changeset 31211:8340137bb190

maint: Merge stable to default.
author Markus Mützel <markus.muetzel@gmx.de>
date Mon, 29 Aug 2022 13:58:00 +0200
parents f5db0112f7e8 (diff) 9ad55d2e1bbf (current diff)
children 55415fa6a20f
files libinterp/corefcn/latex-text-renderer.cc
diffstat 1246 files changed, 55180 insertions(+), 59911 deletions(-) [+]
line wrap: on
line diff
--- a/.github/workflows/make.yaml	Sun Aug 28 22:44:49 2022 +0200
+++ b/.github/workflows/make.yaml	Mon Aug 29 13:58:00 2022 +0200
@@ -76,7 +76,7 @@
           key: ccache:${{ matrix.os }}:${{ matrix.compiler }}:${{ github.ref }}:${{ steps.ccache_cache_timestamp.outputs.timestamp }}:${{ github.sha }}
           restore-keys: |
             ccache:${{ matrix.os }}:${{ matrix.compiler }}:${{ github.ref }}
-            ccache:${{ matrix.os }}:${{ matrix.compiler }}:refs/heads/stable
+            ccache:${{ matrix.os }}:${{ matrix.compiler }}:refs/heads/default
 
       - name: configure ccache
         env:
@@ -215,7 +215,7 @@
           key: ccache:${{ matrix.os }}:${{ matrix.compiler }}:${{ github.ref }}:${{ steps.ccache_cache_timestamp.outputs.timestamp }}:${{ github.sha }}
           restore-keys: |
             ccache:${{ matrix.os }}:${{ matrix.compiler }}:${{ github.ref }}
-            ccache:${{ matrix.os }}:${{ matrix.compiler }}:refs/heads/stable
+            ccache:${{ matrix.os }}:${{ matrix.compiler }}:refs/heads/default
 
       - name: configure ccache
         # The cache doesn't seem to compress well on macOS. Is it already compressed?
@@ -435,7 +435,7 @@
           key: ccache:${{ matrix.os }}:${{ matrix.msystem }}:${{ github.ref }}:${{ steps.ccache_cache_timestamp.outputs.timestamp }}:${{ github.sha }}
           restore-keys: |
             ccache:${{ matrix.os }}:${{ matrix.msystem }}:${{ github.ref }}
-            ccache:${{ matrix.os }}:${{ matrix.msystem }}:refs/heads/stable
+            ccache:${{ matrix.os }}:${{ matrix.msystem }}:refs/heads/default
 
       - name: configure ccache
         # Limit the maximum size and switch on compression to avoid exceeding the total disk or cache quota.
@@ -519,3 +519,25 @@
           [ -n "$(grep -e "FAIL\s*0" ./test-suite.log)" ] || echo "::warning::At least one test failed"
           [ -z "$(grep -e "REGRESSION" ./test-suite.log)" ] || echo "::warning::At least one regression in test suite"
           echo Finished analyzing test suite results.
+
+      - name: install and compress
+        if: matrix.msystem == 'MINGW64'
+        continue-on-error: true
+        run: |
+          echo "::group::Installing Octave"
+          mkdir -p /c/octave/pkg
+          make -C ./.build DESTDIR=/c/octave/pkg install
+          echo "::endgroup::"
+          echo "::group::Compressing Octave package"
+          cd /c/octave/pkg
+          tar -cvzf octave.tar.gz *
+          echo "::endgroup::"
+
+      - name: upload build artifact
+        if: matrix.msystem == 'MINGW64'
+        continue-on-error: true
+        uses: actions/upload-artifact@v3
+        with:
+          name: ${{ matrix.target-prefix }}-octave-${{ steps.ccache_cache_timestamp.outputs.timestamp }}
+          path: C:\octave\pkg\octave.tar.gz
+          retention-days: 7
--- a/.hgignore	Sun Aug 28 22:44:49 2022 +0200
+++ b/.hgignore	Mon Aug 29 13:58:00 2022 +0200
@@ -25,7 +25,7 @@
 (^|/)config.log$
 (^|/)config.status$
 
-^Makefile\.in$
+(^|/)Makefile\.in$
 ^INSTALL$
 
 ## CMake associated files
@@ -40,6 +40,7 @@
 ## Scripts associated with building Octave
 ^build-aux/config\.(guess|rpath|sub)$
 (^|/)build-aux/check-subst-vars\.sh$
+^build-aux/compile$
 ^build-aux/depcomp$
 ^build-aux/install-sh$
 ^build-aux/ltmain\.sh$
@@ -123,3 +124,4 @@
 ## Test associated patterns
 -tst$
 
+^.build/*
--- a/Makefile.am	Sun Aug 28 22:44:49 2022 +0200
+++ b/Makefile.am	Mon Aug 29 13:58:00 2022 +0200
@@ -233,7 +233,7 @@
 # See bug #45578.
 BUILT_SOURCES += libgnu/libgnu.la
 
-libgnu/libgnu.la: oct-conf-post.h
+libgnu/libgnu.la: oct-conf-post-private.h oct-conf-post-public.h
 	cd libgnu && $(MAKE) $(AM_MAKEFLAGS) all
 
 include liboctave/module.mk
@@ -298,7 +298,8 @@
 endif
 
 BUILT_SOURCES += \
-  oct-conf-post.h \
+  oct-conf-post-private.h \
+  oct-conf-post-public.h \
   octave-config.h \
   run-octave \
   $(DIRSTAMP_FILES)
@@ -330,6 +331,7 @@
 CONFIG_FILES = @ac_config_headers@ @ac_config_files@
 
 nodist_octinclude_HEADERS += \
+  oct-conf-post-public.h \
   octave-config.h
 
 OCTAVE_INTERPRETER_TARGETS += \
@@ -458,17 +460,18 @@
 	if [ -n "`cat $(OCT_FILE_PKG_ADD_FILES)`" ]; then \
 	  $(INSTALL_DATA) oct-file-pkg-add $(DESTDIR)$(octfiledir)/PKG_ADD; \
 	fi
+	top_build_dir=`pwd` && \
 	cd $(DESTDIR)$(octlibdir) && \
 	for ltlib in $(OCT_FILE_LIBS); do \
 	  f=`echo $$ltlib | $(SED) 's,.*/,,'`; \
-	  dl=`$(SED) -n -e "s/dlname='\([^']*\)'/\1/p" < $$f`; \
+	  dl=`$(SED) -n -e "s/dlname='\([^']*\)'/\1/p" < $$top_build_dir/$$ltlib`; \
 	  if [ -n "$$dl" ]; then \
 	    $(INSTALL_PROGRAM) $$dl $(DESTDIR)$(octfiledir)/`echo $$f | $(SED) 's,^lib,,; s,\.la$$,.oct,'`; \
 	  else \
 	    echo "error: dlname is empty in $$ltlib!"; \
 	    exit 1; \
 	  fi; \
-	  lnames=`$(SED) -n -e "s/library_names='\([^']*\)'/\1/p" < $$f`; \
+	  lnames=`$(SED) -n -e "s/library_names='\([^']*\)'/\1/p" < $$top_build_dir/$$ltlib`; \
 	  if [ -n "$$lnames" ]; then \
 	    rm -f $$f $$lnames $$dl; \
 	  fi \
--- a/bootstrap.conf	Sun Aug 28 22:44:49 2022 +0200
+++ b/bootstrap.conf	Mon Aug 29 13:58:00 2022 +0200
@@ -90,6 +90,7 @@
   stat
   stddef
   stdio
+  strcase
   strdup-posix
   strerror
   strptime
@@ -100,7 +101,6 @@
   sys_times
   sys_wait
   tempname
-  tmpfile
   uname
   unicase/u8-tolower
   unicase/u8-toupper
--- a/build-aux/mk-octave-config-h.sh	Sun Aug 28 22:44:49 2022 +0200
+++ b/build-aux/mk-octave-config-h.sh	Mon Aug 29 13:58:00 2022 +0200
@@ -100,210 +100,22 @@
 #define octave_octave_config_h 1
 
 #if ! defined (OCTAVE_AUTOCONFIG_H_INCLUDED)
-
-#  if defined (__cplusplus)
-#    include <cinttypes>
-#  else
-#    include <inttypes.h>
-#  endif
-
-#  define OCTAVE_NAMESPACE_BEGIN namespace octave {
-#  define OCTAVE_NAMESPACE_END }
-
-#  if defined (__GNUC__)
-#    if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5)
-#      define OCTAVE_DEPRECATED(ver, msg) __attribute__ ((__deprecated__ ("[" #ver "]: " msg)))
-#    else
-#      define OCTAVE_DEPRECATED(ver, msg) __attribute__ ((__deprecated__))
-#    endif
-#    define OCTAVE_NORETURN __attribute__ ((__noreturn__))
-#    define OCTAVE_UNUSED __attribute__ ((__unused__))
-
-#    define HAVE_OCTAVE_DEPRECATED_ATTR 1
-#    define HAVE_OCTAVE_NORETURN_ATTR 1
-#    define HAVE_OCTAVE_UNUSED_ATTR 1
-#  else
-#    define OCTAVE_DEPRECATED(ver, msg)
-#    define OCTAVE_NORETURN
-#    define OCTAVE_UNUSED
-
-/* #    undef HAVE_OCTAVE_DEPRECATED_ATTR */
-/* #    undef HAVE_OCTAVE_NORETURN_ATTR */
-/* #    undef HAVE_OCTAVE_UNUSED_ATTR */
-#  endif
-
-#  if defined (__MINGW32__)
-    /* MinGW requires special handling due to different format specifiers
-     * on different platforms.  The macro __MINGW_PRINTF_FORMAT maps to
-     * either gnu_printf or ms_printf depending on where we are compiling
-     * to avoid warnings on format specifiers that are legal.
-     * See: https://bugzilla.mozilla.org/show_bug.cgi?id=1331349  */
-#    if defined (__cplusplus)
-#      include <cstdio>
-#    else
-#      include <stdio.h>
-#    endif
-
-#    define OCTAVE_FORMAT_PRINTF(stringIndex, firstToCheck) \
-       __attribute__ ((format (__MINGW_PRINTF_FORMAT, stringIndex, firstToCheck)))
-
-#    define HAVE_OCTAVE_FORMAT_PRINTF_ATTR 1
-#  elif defined (__GNUC__)
-     /* The following attributes are used with gcc and clang compilers.  */
-#    define OCTAVE_FORMAT_PRINTF(index, first) \
-       __attribute__ ((__format__(printf, index, first)))
-
-#    define HAVE_OCTAVE_FORMAT_PRINTF_ATTR 1
-#  else
-#    define OCTAVE_FORMAT_PRINTF(index, first)
-
-/* #    undef HAVE_OCTAVE_FORMAT_PRINTF_ATTR */
-#  endif
-
-#  if ! defined (OCTAVE_FALLTHROUGH)
-#    if defined (__cplusplus) && __cplusplus > 201402L
-#      define OCTAVE_FALLTHROUGH [[fallthrough]]
-#    elif defined (__GNUC__) && __GNUC__ < 7
-#      define OCTAVE_FALLTHROUGH ((void) 0)
-#    else
-#      define OCTAVE_FALLTHROUGH __attribute__ ((__fallthrough__))
-#    endif
-#  endif
-
-#  define OCTAVE_PROVIDE_DEPRECATED_SYMBOLS 1
-
-#  if defined (__cplusplus)
-template <typename T>
-static inline void
-octave_unused_parameter (const T&)
-{ }
-#  else
-#    define octave_unused_parameter(param) (void) param;
-#  endif
-
-/* Defined to 1 if Octave libraries were built with visibility flags */
 EOF
 
-$SED -n 's/#\(\(undef\|define\) OCTAVE_ENABLE_LIB_VISIBILITY_FLAGS.*$\)/#  \1/p' $config_h_file
-
-cat << EOF
-
-#  if defined (OCTAVE_ENABLE_LIB_VISIBILITY_FLAGS)
-#    if defined (_WIN32) || defined (__CYGWIN__)
-#      if defined (__GNUC__)
-         /* GCC */
-#        define OCTAVE_EXPORT __attribute__ ((dllexport))
-#        define OCTAVE_IMPORT __attribute__ ((dllimport))
-#      else
-         /* MSVC */
-#        define OCTAVE_EXPORT __declspec(dllexport)
-#        define OCTAVE_IMPORT __declspec(dllimport)
-#      endif
-#    else
-       /* All other platforms. */
-#      define OCTAVE_EXPORT __attribute__ ((visibility ("default")))
-#      define OCTAVE_IMPORT
-#    endif
-#  else
-#      define OCTAVE_EXPORT
-#      define OCTAVE_IMPORT
-#  endif
-
-/* API macro for liboctave */
-#if defined (OCTAVE_DLL)
-#  define OCTAVE_API OCTAVE_EXPORT
-#else
-#  define OCTAVE_API OCTAVE_IMPORT
-#endif
-
-/* API macro for libinterp */
-#if defined (OCTINTERP_DLL)
-#  define OCTINTERP_API OCTAVE_EXPORT
-#else
-#  define OCTINTERP_API OCTAVE_IMPORT
-#endif
-
-/* API macro for the Array class in liboctave and liboctinterp */
-#if (defined (OCTAVE_DLL) || defined (OCTINTERP_DLL))
-#  define OCTARRAY_API OCTAVE_EXPORT
-#else
-#  define OCTARRAY_API OCTAVE_IMPORT
-#endif
-
-/* API macro for libinterp/graphics */
-#if defined (OCTGRAPHICS_DLL)
-#  define OCTGRAPHICS_API OCTAVE_EXPORT
-#else
-#  define OCTGRAPHICS_API OCTAVE_IMPORT
-#endif
-
-/* API macro for libgui */
-#if defined (OCTGUI_DLL)
-#  define OCTGUI_API OCTAVE_EXPORT
-#else
-#  define OCTGUI_API OCTAVE_IMPORT
-#endif
-EOF
-
-octave_idx_type="`$SED -n 's/#define OCTAVE_IDX_TYPE \([_a-zA-Z][_a-zA-Z0-9]*\)/\1/p' $config_h_file`"
-
-if test -z "$octave_idx_type"; then
-  echo "mk-octave-config-h.sh: failed to find OCTAVE_IDX_TYPE in $config_h_file" 1>&2
-  exit 1
-fi
-
-octave_f77_int_type="`$SED -n 's/#define OCTAVE_F77_INT_TYPE \([_a-zA-Z][_a-zA-Z0-9]*\)/\1/p' $config_h_file`"
-
-if test -z "$octave_f77_int_type"; then
-  echo "mk-octave-config-h.sh: failed to find OCTAVE_F77_INT_TYPE in $config_h_file" 1>&2
-  exit 1
-fi
-
-cat << EOF
-
-typedef $octave_idx_type octave_idx_type;
-typedef $octave_f77_int_type octave_f77_int_type;
-
-#  define OCTAVE_HAVE_F77_INT_TYPE 1
-
-/* time type in API is always 64 bits wide */
-#  define OCTAVE_TIME_T int64_t
-
-#  if defined (__cplusplus) && ! defined (OCTAVE_THREAD_LOCAL)
-#    define OCTAVE_THREAD_LOCAL
-#  endif
-
-EOF
-
-if grep "#define OCTAVE_ENABLE_FLOAT_TRUNCATE 1" $config_h_file > /dev/null; then
-  echo "#  define OCTAVE_FLOAT_TRUNCATE volatile"
-else
-  echo "#  define OCTAVE_FLOAT_TRUNCATE"
-fi
-
-echo ""
-
 $SED -n 's/#\(\(undef\|define\) OCTAVE_ENABLE_64.*$\)/#  \1/p' $config_h_file
 $SED -n 's/#\(\(undef\|define\) OCTAVE_ENABLE_BOUNDS_CHECK.*$\)/#  \1/p' $config_h_file
+$SED -n 's/#\(\(undef\|define\) OCTAVE_ENABLE_FLOAT_TRUNCATE.*$\)/#  \1/p' $config_h_file
+$SED -n 's/#\(\(undef\|define\) OCTAVE_ENABLE_LIB_VISIBILITY_FLAGS.*$\)/#  \1/p' $config_h_file
 $SED -n 's/#\(\(undef\|define\) OCTAVE_ENABLE_OPENMP.*$\)/#  \1/p' $config_h_file
+$SED -n 's/#\(\(undef\|define\) OCTAVE_F77_INT_TYPE.*$\)/#  \1/p' $config_h_file
 $SED -n 's/#\(\(undef\|define\) OCTAVE_HAVE_LONG_LONG_INT.*$\)/#  \1/p' $config_h_file
+$SED -n 's/#\(\(undef\|define\) OCTAVE_HAVE_OVERLOAD_CHAR_INT8_TYPES.*$\)/#  \1/p' $config_h_file
+$SED -n 's/#\(\(undef\|define\) OCTAVE_HAVE_STD_PMR_POLYMORPHIC_ALLOCATOR.*$\)/#  \1/p' $config_h_file
 $SED -n 's/#\(\(undef\|define\) OCTAVE_HAVE_UNSIGNED_LONG_LONG_INT.*$\)/#  \1/p' $config_h_file
-$SED -n 's/#\(\(undef\|define\) OCTAVE_HAVE_STD_PMR_POLYMORPHIC_ALLOCATOR.*$\)/#  \1/p' $config_h_file
-$SED -n 's/#\(\(undef\|define\) OCTAVE_HAVE_OVERLOAD_CHAR_INT8_TYPES.*$\)/#  \1/p' $config_h_file
+$SED -n 's/#\(\(undef\|define\) OCTAVE_IDX_TYPE.*$\)/#  \1/p' $config_h_file
 $SED -n 's/#\(\(undef\|define\) OCTAVE_SIZEOF_F77_INT_TYPE.*$\)/#  \1/p' $config_h_file
 $SED -n 's/#\(\(undef\|define\) OCTAVE_SIZEOF_IDX_TYPE.*$\)/#  \1/p' $config_h_file
 $SED -n 's/#\(\(undef\|define\) OCTAVE_SIZEOF_INT.*$\)/#  \1/p' $config_h_file
-
-cat << EOF
-
-#  if defined (OCTAVE_ENABLE_64)
-#    define OCTAVE_IDX_TYPE_FORMAT PRId64
-#  else
-#    define OCTAVE_IDX_TYPE_FORMAT PRId32
-#  endif
-
-EOF
-
 $SED -n 's/#\(\(undef\|define\) gid_t.*$\)/#  \1/p' $config_h_file
 $SED -n 's/#\(\(undef\|define\) uid_t.*$\)/#  \1/p' $config_h_file
 $SED -n 's/#\(\(undef\|define\) nlink_t.*$\)/#  \1/p' $config_h_file
@@ -372,6 +184,14 @@
 
 cat << EOF
 
+/* Enable inline functions or typedefs that provide access to
+   symbols that have been moved to the octave namespace so that
+   users of Octave may continue to access symbols using the
+   deprecated names.  */
+#  define OCTAVE_PROVIDE_DEPRECATED_SYMBOLS 1
+
+#  include "oct-conf-post-public.h"
+
 #endif
 
 #endif
--- a/build-aux/module.mk	Sun Aug 28 22:44:49 2022 +0200
+++ b/build-aux/module.mk	Mon Aug 29 13:58:00 2022 +0200
@@ -27,7 +27,8 @@
 	$(AM_V_GEN)$(SHELL) config.status $@-tmp $@
 
 GEN_CONFIG_INC = \
-  oct-conf-post.h
+  oct-conf-post-private.h \
+  oct-conf-post-public.h
 
 $(GEN_CONFIG_INC) : %.h : %.in.h config.status
 	$(AM_V_GEN)$(SHELL) config.status $@-tmp $@
--- a/configure.ac	Sun Aug 28 22:44:49 2022 +0200
+++ b/configure.ac	Mon Aug 29 13:58:00 2022 +0200
@@ -27,7 +27,7 @@
 
 ### Initialize Autoconf
 AC_PREREQ([2.65])
-AC_INIT([GNU Octave], [7.2.1], [https://octave.org/bugs.html], [octave],
+AC_INIT([GNU Octave], [8.0.0], [https://octave.org/bugs.html], [octave],
         [https://www.gnu.org/software/octave/])
 
 ### Declare version numbers
@@ -39,9 +39,9 @@
 ## explains how to update these numbers for release and development
 ## versions.
 
-OCTAVE_MAJOR_VERSION=7
-OCTAVE_MINOR_VERSION=2
-OCTAVE_PATCH_VERSION=1
+OCTAVE_MAJOR_VERSION=8
+OCTAVE_MINOR_VERSION=0
+OCTAVE_PATCH_VERSION=0
 
 dnl PACKAGE_VERSION is set by the AC_INIT VERSION argument.
 OCTAVE_VERSION="$PACKAGE_VERSION"
@@ -63,7 +63,7 @@
 dnl FIXME: Since we also set libtool versions for liboctave and libinterp,
 dnl perhaps we should be computing the "api version" from those versions numbers
 dnl in some way instead of setting it independently here.
-OCTAVE_API_VERSION="api-v57"
+OCTAVE_API_VERSION="api-v57+"
 
 AC_SUBST(OCTAVE_MAJOR_VERSION)
 AC_SUBST(OCTAVE_MINOR_VERSION)
@@ -135,7 +135,7 @@
   '${libdir}/octave/${version}/oct/${canonical_host_type}')
 
 ## Directories that Octave should search for object files that will be
-## dynamically loaded and that are specific to this site (i.e. customizations),
+## dynamically loaded and that are specific to this site (i.e., customizations),
 ## before consulting ${octfiledir}.  This should be a colon-separated list of
 ## directories.
 OCTAVE_SET_DEFAULT([localoctfiledir],
@@ -156,7 +156,7 @@
 OCTAVE_SET_DEFAULT([fcnfiledir], '${datadir}/octave/${version}/m')
 
 ## Directories that Octave should search for function files specific to this
-## site (i.e. customizations), before consulting ${fcnfiledir}.
+## site (i.e., customizations), before consulting ${fcnfiledir}.
 ## This should be a colon-separated list of directories.
 OCTAVE_SET_DEFAULT([localfcnfiledir], '${datadir}/octave/site/m')
 
@@ -252,7 +252,7 @@
 AM_CONDITIONAL([AMCOND_HAVE_ICON_TOOLS],
   [test -n "$ICOTOOL" && test -n "$RSVG_CONVERT"])
 
-### Path separator.
+### Determine path separator.
 
 sepchar=':'
 AC_ARG_WITH([sepchar],
@@ -279,9 +279,9 @@
   [Define this to be the path separator for your system, as a string.])
 
 ### Define the path to the shell on the host system.
-### Most systems will ensure /bin/sh is the default shell so this can be safely
-### ignored by almost everyone.  However, when building for Android, for
-### example, this will need to be set.
+dnl Most systems will ensure /bin/sh is the default shell so this can be safely
+dnl ignored by almost everyone.  However, there are exceptions, such as
+dnl Android, where this will need to be set.
 SHELL_PATH=/bin/sh
 AC_ARG_WITH([shell],
   [AS_HELP_STRING([--with-shell=SHELL],
@@ -299,34 +299,6 @@
 AC_DEFINE_UNQUOTED([SHELL_PATH], ["$SHELL_PATH"],
   [Define this to be the path to the shell command interpreter.])
 
-### Use the system-wide installation of GNU FreeFont if the user requests it.
-### By default, Octave includes its own copy of the FreeSans font, which it
-### installs in its own directory for use as a fallback default font.  If this
-### configuration option is used, then do not install our own copy of the fonts
-### and assume they can be found in the provided system directory.
-SYSTEM_FREEFONT_DIR=
-AC_ARG_WITH([system-freefont],
-  [AS_HELP_STRING([--with-system-freefont=DIR],
-    [use FreeSans fonts in DIR (default: install and use internal copy)])])
-case $with_system_freefont in
-  no | "")
-    SYSTEM_FREEFONT_DIR=
-    ;;
-  yes)
-    AC_MSG_ERROR([directory argument required for --with-system-freefont])
-    ;;
-  *)
-    SYSTEM_FREEFONT_DIR=$with_system_freefont
-    ;;
-esac
-if test -n "$SYSTEM_FREEFONT_DIR"; then
-  AC_MSG_NOTICE([configuring Octave to use system fonts in $SYSTEM_FREEFONT_DIR])
-  AC_DEFINE_UNQUOTED([SYSTEM_FREEFONT_DIR], ["$SYSTEM_FREEFONT_DIR"],
-    [Define this to be the system directory containing the GNU FreeFont fonts.])
-fi
-AM_CONDITIONAL([AMCOND_INSTALL_INTERNAL_FONT_FILES],
-  [test -z "$SYSTEM_FREEFONT_DIR"])
-
 ### Determine which C++ compiler to use (we expect to find g++).
 
 AC_PROG_CXX
@@ -335,14 +307,14 @@
 ENABLE_STD_PMR_POLYMORPHIC_ALLOCATOR=no
 AC_ARG_ENABLE(std-pmr-polymorphic-allocator,
   [AS_HELP_STRING([--enable-std-pmr-polymorphic-allocator],
-    [build libraries requiring std::pmr::polymorphic_allocator if possible. This allows more efficient transfer of arrays at the .mex file interface. That also means that all libraries including Octave headers (e.g., .oct files) must be able to compile with that C++17 feature.])],
+    [build libraries requiring std::pmr::polymorphic_allocator if possible.  This allows more efficient transfer of arrays at the .mex file interface.  That also means that all libraries including Octave headers (e.g., .oct files) must be able to compile with that C++17 feature.])],
   [case $enableval in
      yes) ENABLE_STD_PMR_POLYMORPHIC_ALLOCATOR=yes ;;
      no) ENABLE_STD_PMR_POLYMORPHIC_ALLOCATOR=no ;;
      *) AC_MSG_ERROR([bad value $enableval for --enable-std-pmr-polymorphic-allocator]) ;;
    esac])
 
-### Check compiler capabilities.
+### Determine compiler capabilities.
 
 if test $ENABLE_STD_PMR_POLYMORPHIC_ALLOCATOR = yes; then
   ## Test for flags to fully support C++17.
@@ -403,16 +375,16 @@
 
 GXX_VERSION=
 if test "$GXX" = yes; then
-  AC_MSG_CHECKING([C++ compiler version number])
-  gxx_version=`$CXX -v 2>&1 | $GREP "^.*g.. version" | \
-    $SED -e 's/^.*g.. version *//' -e 's/cygnus-//' -e 's/egcs-//' -e 's/ .*//'`
-
-  AX_COMPARE_VERSION([$gxx_version], [lt], [4.1],
-    [warn_gxx_version="g++ version $gxx_version is likely to cause problems"
+  AC_CACHE_CHECK([g++ compiler version number],
+    [octave_cv_gxx_version],
+    [octave_cv_gxx_version=[`$CXX -v 2>&1 | $GREP "^.*g.. version" | $SED -e 's/^.*g.. version *//' -e 's/cygnus-//' -e 's/egcs-//' -e 's/ .*//'`]
+  ])
+
+  AX_COMPARE_VERSION([$octave_cv_gxx_version], [lt], [4.1],
+    [warn_gxx_version="g++ version $octave_cv_gxx_version is likely to cause problems"
      OCTAVE_CONFIGURE_WARNING([warn_gxx_version])])
 
-  GXX_VERSION=$gxx_version
-  AC_MSG_RESULT([$GXX_VERSION])
+  GXX_VERSION=$octave_cv_gxx_version
 fi
 AC_SUBST(GXX_VERSION)
 
@@ -431,16 +403,16 @@
 
 GCC_VERSION=
 if test "$GCC" = yes; then
-  AC_MSG_CHECKING([C compiler version number])
-  gcc_version=`$CC -v 2>&1 | $GREP "^.*gcc version" | \
-    $SED -e 's/^.*g.. version *//' -e 's/cygnus-//' -e 's/egcs-//' -e 's/ .*//'`
-
-  AX_COMPARE_VERSION([$gcc_version], [lt], [3],
-    [warn_gcc_version="gcc version $gcc_version is likely to cause problems"
+  AC_CACHE_CHECK([gcc compiler version number],
+    [octave_cv_gcc_version],
+    [octave_cv_gcc_version=[`$CC -v 2>&1 | $GREP "^.*gcc version" | $SED -e 's/^.*g.. version *//' -e 's/cygnus-//' -e 's/egcs-//' -e 's/ .*//'`]
+  ])
+
+  AX_COMPARE_VERSION([$octave_cv_gcc_version], [lt], [3],
+    [warn_gcc_version="gcc version $octave_cv_gcc_version is likely to cause problems"
      OCTAVE_CONFIGURE_WARNING([warn_gcc_version])])
 
-  GCC_VERSION=$gcc_version
-  AC_MSG_RESULT([$GCC_VERSION])
+  GCC_VERSION=$octave_cv_gcc_version
 fi
 AC_SUBST(GCC_VERSION)
 
@@ -487,7 +459,7 @@
 dnl in case -lm is needed to compile Fortran programs.
 AC_CHECK_LIB(m, sin)
 
-### Determine the Fortran compiler and how to invoke it
+### Determine the Fortran compiler and how to invoke it.
 
 ## Prefer gfortran, but the user's F77 environment variable will override.
 AC_PROG_F77([gfortran])
@@ -511,10 +483,10 @@
 AC_F77_DUMMY_MAIN
 AC_F77_WRAPPERS
 
-### Must appear after checks for Fortran compiler.
+## Must appear after checks for Fortran compiler.
 OCTAVE_CHECK_FORTRAN_SYMBOL_AND_CALLING_CONVENTIONS
 
-### Must appear after checks for compilers.
+## Must appear after checks for all compilers.
 OCTAVE_DEFINE_MKOCTFILE_DYNAMIC_LINK_OPTIONS
 
 ### Use a 64-bit integer type for array dimensions and indexing, if possible.
@@ -568,7 +540,7 @@
 AC_DEFINE_UNQUOTED(OCTAVE_IDX_TYPE, [$OCTAVE_IDX_TYPE],
   [Define to the type of octave_idx_type (64 or 32 bit signed integer).])
 
-### Check for pthread library
+### Check for pthread library.
 
 AX_PTHREAD
 dnl Include pthread libs and flags early in case other config tests need them.
@@ -586,7 +558,6 @@
 AM_CONDITIONAL([OCTAVE_CHECK_BROKEN_PTHREAD_STACKSIZE],
   [test $octave_cv_broken_pthread_stacksize = yes])
 
-
 ### Test whether the compiler supports OpenMP.
 dnl This is enabled by default to allow the option of using OpenMP in
 dnl loadable modules.
@@ -619,7 +590,7 @@
   AC_DEFINE(OCTAVE_ENABLE_OPENMP, 1, [Define to 1 if OpenMP is enabled])
 fi
 
-### Start determination of shared vs. static libraries
+### Start determination of shared vs. static libraries.
 
 ## Use -static if compiling on Alpha OSF/1 1.3 systems.
 case $canonical_host_type in
@@ -670,7 +641,6 @@
   AC_MSG_ERROR([You can't disable building both static AND shared libraries!])
 fi
 
-
 ### More configure argument checking related to linking
 
 case $host_os in
@@ -683,7 +653,7 @@
 esac
 AC_ARG_ENABLE([no-undefined],
   [AS_HELP_STRING([--enable-no-undefined],
-    [pass -no-undefined to libtool when linking Octave and its shared libraries. This is done by default for msdosmsvc, mingw*, AIX, BeOS, or OS/2 hosts.])],
+    [pass -no-undefined to libtool when linking Octave and its shared libraries.  This is done by default for msdosmsvc, mingw*, AIX, BeOS, or OS/2 hosts.])],
   [case $enableval in
      yes) NO_UNDEFINED_LDFLAG="-no-undefined" ;;
      no)  NO_UNDEFINED_LDFLAG="" ;;
@@ -704,16 +674,13 @@
   [link_all_deps=no])
 AM_CONDITIONAL([AMCOND_LINK_ALL_DEPS], [test $link_all_deps = yes])
 
-### Check for BLAS and LAPACK libraries:
+### Check for BLAS and LAPACK libraries.
 
 ## Need to adjust FFLAGS to include correct integer size.
 save_FFLAGS="$FFLAGS"
 FFLAGS="$FFLAGS $F77_INTEGER_8_FLAG"
 
-OCTAVE_BLAS_WITH_F77_FUNC([], [],
-  [ax_blas_ok=yes
-  AC_MSG_CHECKING([BLAS can be called from Fortran])
-  AC_MSG_RESULT([yes assumed for cross compilation])])
+OCTAVE_BLAS
 AX_LAPACK
 
 ## Restore FFLAGS.
@@ -724,7 +691,7 @@
   save_FFLAGS="$FFLAGS"
   FFLAGS="-ff2c $FFLAGS $F77_INTEGER_8_FLAG"
 
-  OCTAVE_BLAS_WITH_F77_FUNC
+  OCTAVE_BLAS
   AX_LAPACK
 
   ## Restore FFLAGS, with -ff2c if that was helpful
@@ -753,7 +720,7 @@
          save_FFLAGS="$FFLAGS"
          FFLAGS="$FFLAGS $F77_INTEGER_8_FLAG"
 
-         OCTAVE_BLAS_WITH_F77_FUNC
+         OCTAVE_BLAS
          AX_LAPACK
 
          ## Restore FFLAGS.
@@ -781,7 +748,7 @@
   AC_MSG_ERROR([BLAS and LAPACK libraries are required])
 fi
 
-case $ax_blas_integer_size in
+case $ax_cv_blas_integer_size in
   4)
     HAVE_64_BIT_BLAS=no
   ;;
@@ -794,8 +761,8 @@
 esac
 
 OCTAVE_CHECK_SIZEOF_FORTRAN_INTEGER
-if test $octave_cv_sizeof_fortran_integer -ne $ax_blas_integer_size; then
-  if test $ax_blas_integer_size -eq 8; then
+if test $octave_cv_sizeof_fortran_integer -ne $ax_cv_blas_integer_size; then
+  if test $ax_cv_blas_integer_size -eq 8; then
     case $F77 in
       *gfortran*)
         case $F77_INTEGER_8_FLAG in
@@ -825,8 +792,8 @@
   fi
   ## We intentionally don't attempt to fix things up if the default
   ## Fortran integer size is 8 but BLAS appears to use 4-byte integers.
-  if test $octave_cv_sizeof_fortran_integer -ne $ax_blas_integer_size; then
-    AC_MSG_ERROR([your Fortran compiler must have an option for setting the default integer size to be the same size as your BLAS library uses ($ax_blas_integer_size bytes).  See the file INSTALL for more information.])
+  if test $octave_cv_sizeof_fortran_integer -ne $ax_cv_blas_integer_size; then
+    AC_MSG_ERROR([your Fortran compiler must have an option for setting the default integer size to be the same size as your BLAS library uses ($ax_cv_blas_integer_size bytes).  See the file INSTALL for more information.])
   fi
 fi
 AC_SUBST(F77_INTEGER_8_FLAG)
@@ -866,8 +833,9 @@
 AM_CONDITIONAL([AMCOND_BUILD_EXTERNAL_LIBXERBLA],
   [test -n "$BUILD_EXTERNAL_LIBXERBLA"])
 
-### Dynamic linking is now enabled only if we are building shared
-### libs and some API for dynamic linking has been detected.
+### Set options for dynamic linking if enabled.
+dnl Options set only only if we are building shared libs and some API for
+dnl dynamic linking has been detected.
 
 dnl FIXME: A lot of the following duplicates the functionality of
 dnl code generated by the dlopen option for LT_INIT.
@@ -1374,7 +1342,40 @@
 #endif
 ]])
 
-### Check for the Qhull library.
+### Configure Bison as push or pull parser.
+
+ENABLE_COMMAND_LINE_PUSH_PARSER=yes
+AC_ARG_ENABLE([command-line-push-parser],
+  [AS_HELP_STRING([--disable-command-line-push-parser],
+    [don't use Bison's push parser interface in the command line REPL])],
+  [if test "$enableval" = no; then ENABLE_COMMAND_LINE_PUSH_PARSER=no; fi], [])
+if test $ENABLE_COMMAND_LINE_PUSH_PARSER = yes; then
+  AC_DEFINE(OCTAVE_ENABLE_COMMAND_LINE_PUSH_PARSER, 1,
+    [Define to 1 to use Bison's push parser interface in the command line REPL.])
+fi
+
+### Configure compilation of *experimental* Virtual Machine evaluator.
+
+ENABLE_VM_EVALUATOR=yes
+AC_ARG_ENABLE([vm-evaluator],
+  [AS_HELP_STRING([--disable-vm-evaluator],
+    [don't compile *experimental* virtual machine evaluator])],
+  [if test "$enableval" = no; then ENABLE_VM_EVALUATOR=no; fi], [])
+if test $ENABLE_VM_EVALUATOR = yes; then
+  AC_DEFINE(OCTAVE_ENABLE_VM_EVALUATOR, 1,
+    [Define to 1 to build experimental Virtual Machine evaluator.])
+fi
+
+### Check for PCRE regex library.
+
+OCTAVE_CHECK_LIB(pcre, PCRE,
+  [], [pcre.h pcre/pcre.h], [pcre_compile], [], [],
+  [OCTAVE_CHECK_LIB_PCRE_OK([],
+    [AC_MSG_ERROR([PCRE library must be built with UTF support (--enable-utf)])])
+  ],
+  [libpcre], [REQUIRED])
+
+### Check for Qhull library.
 
 QHULL_CPPFLAGS=
 QHULL_LDFLAGS=
@@ -1395,16 +1396,7 @@
 AC_SUBST(QHULL_LDFLAGS)
 AC_SUBST(QHULL_LIBS)
 
-### Check for PCRE regex library.
-
-OCTAVE_CHECK_LIB(pcre, PCRE,
-  [], [pcre.h pcre/pcre.h], [pcre_compile], [], [],
-  [OCTAVE_CHECK_LIB_PCRE_OK([],
-    [AC_MSG_ERROR([PCRE library must be built with UTF support (--enable-utf)])])
-  ],
-  [libpcre], [REQUIRED])
-
-### Check for RapidJSON header only library.
+### Check for RapidJSON header-only library.
 
 check_for_rapidjson=yes
 AC_ARG_ENABLE([rapidjson],
@@ -1462,18 +1454,6 @@
 ## Find a termlib to use.
 OCTAVE_CHECK_LIB_TERMLIB
 
-### Use push parser by default now.
-
-ENABLE_COMMAND_LINE_PUSH_PARSER=yes
-AC_ARG_ENABLE([command-line-push-parser],
-  [AS_HELP_STRING([--disable-command-line-push-parser],
-    [don't use Bison's push parser interface in the command line REPL])],
-  [if test "$enableval" = no; then ENABLE_COMMAND_LINE_PUSH_PARSER=no; fi], [])
-if test $ENABLE_COMMAND_LINE_PUSH_PARSER = yes; then
-  AC_DEFINE(OCTAVE_ENABLE_COMMAND_LINE_PUSH_PARSER, 1,
-    [Define to 1 to use Bison's push parser interface in the command line REPL.])
-fi
-
 ### Check for ZLIB library.
 
 OCTAVE_CHECK_LIB(z, ZLIB,
@@ -1521,7 +1501,7 @@
 fi
 
 ### Check for FFTW library.
-### Default to Fortran FFTPACK if it is not available.
+dnl Default to Fortran FFTPACK if it is not available.
 
 ## Check for FFTW header and library.
 OCTAVE_CHECK_LIB(fftw3, FFTW3,
@@ -1556,7 +1536,7 @@
   build_fftw_threads=no
 fi
 
-## Check for the multithreaded FFTW library.
+## Check for multithreaded FFTW library.
 ## Fallback to singlethreaded if not found or disabled.
 if test $build_fftw_threads = yes; then
   OCTAVE_CHECK_FFTW_THREADS(fftw3, fftw_plan_with_nthreads)
@@ -1599,7 +1579,7 @@
 LIBS="$save_LIBS"
 CPPFLAGS="$save_CPPFLAGS"
 
-### Checks for cURL header and library.
+### Check for cURL library existence and functionality.
 
 save_CPPFLAGS="$CPPFLAGS"
 save_LIBS="$LIBS"
@@ -1639,7 +1619,7 @@
     [AC_DEFINE(HAVE_SNDFILE, 1, [Define to 1 if sndfile is available.])],
     [warn_sndfile="sndfile library found, but does not seem to work properly; disabling audio file I/O functions"])])
 
-### Check for PortAudio
+### Check for PortAudio library.
 
 OCTAVE_CHECK_LIB(portaudio, PortAudio,
   [PortAudio library not found.  The audioplayer, audiorecorder, and audiodevinfo functions will be disabled.],
@@ -1647,7 +1627,7 @@
   [], [don't use PortAudio library, disable audio playback and recording],
   [], [portaudio-2.0])
 
-### Check for either of Graphics/ImageMagick++ libraries.
+### Check for either of GraphicsMagick++/ImageMagick++ libraries.
 
 check_magick=yes
 use_magick=no
@@ -1726,7 +1706,7 @@
 AC_SUBST(MAGICK_LDFLAGS)
 AC_SUBST(MAGICK_LIBS)
 
-### Check for X11 libraries
+### Check for X11 libraries.
 
 AC_PATH_X
 if test "$have_x" = yes; then
@@ -1874,7 +1854,7 @@
 AC_SUBST(DEFAULT_TERMINAL_FONT)
 AC_SUBST(DEFAULT_TERMINAL_FONT_SIZE)
 
-### Check for FLTK library
+### Check for FLTK library.
 
 check_fltk=yes
 build_fltk_graphics=no
@@ -1989,7 +1969,7 @@
 AC_SUBST(FLTK_LDFLAGS)
 AC_SUBST(FLTK_LIBS)
 
-### Final determination of whether OpenGL graphics can be built
+### Final determination of whether OpenGL graphics can be built.
 if test $build_qt_graphics = no && test $build_fltk_graphics = no; then
   opengl_graphics=no
 else
@@ -2015,7 +1995,35 @@
   AC_SUBST(GL2PS_LIBS)
 fi
 
-### Check for the qrupdate library
+### Use the system-wide installation of GNU FreeFont if the user requests it.
+dnl By default, Octave includes its own copy of the FreeSans font which it
+dnl installs in its own directory for use as a fallback default font.  If this
+dnl configuration option is used, then do not install our own copy of the fonts
+dnl and assume they can be found in the provided system directory.
+SYSTEM_FREEFONT_DIR=
+AC_ARG_WITH([system-freefont],
+  [AS_HELP_STRING([--with-system-freefont=DIR],
+    [use FreeSans fonts in DIR (default: install and use internal copy)])])
+case $with_system_freefont in
+  no | "")
+    SYSTEM_FREEFONT_DIR=
+    ;;
+  yes)
+    AC_MSG_ERROR([directory argument required for --with-system-freefont])
+    ;;
+  *)
+    SYSTEM_FREEFONT_DIR=$with_system_freefont
+    ;;
+esac
+if test -n "$SYSTEM_FREEFONT_DIR"; then
+  AC_MSG_NOTICE([configuring Octave to use system fonts in $SYSTEM_FREEFONT_DIR])
+  AC_DEFINE_UNQUOTED([SYSTEM_FREEFONT_DIR], ["$SYSTEM_FREEFONT_DIR"],
+    [Define this to be the system directory containing the GNU FreeFont fonts.])
+fi
+AM_CONDITIONAL([AMCOND_INSTALL_INTERNAL_FONT_FILES],
+  [test -z "$SYSTEM_FREEFONT_DIR"])
+
+### Check for qrupdate library.
 
 dnl No need to adjust FFLAGS because only link is attempted.
 dnl Must supply proper LIBS, however.
@@ -2069,11 +2077,11 @@
   SUITESPARSECONFIG_LIBS="$SUITESPARSECONFIG_LIBS $LIB_CLOCK_GETTIME"
 fi
 
-### Reset below, after all checks for SuiteSparse libraries.
+## Save and restore LIBS after all checks for SuiteSparse libraries.
 suitesparse_save_LIBS="$LIBS"
 LIBS="$SUITESPARSECONFIG_LIBS $LIBS"
 
-### Check for AMD library
+### Check for AMD library.
 
 OCTAVE_CHECK_LIB(amd, AMD,
   [AMD library not found.  This will result in some lack of functionality for sparse matrices.],
@@ -2081,7 +2089,7 @@
   [amd_postorder],
   [], [don't use AMD library, disable some sparse matrix functionality])
 
-### Check for CAMD library
+### Check for CAMD library.
 
 OCTAVE_CHECK_LIB(camd, CAMD,
   [CAMD library not found.  This will result in some lack of functionality for sparse matrices.],
@@ -2089,7 +2097,7 @@
   [camd_postorder],
   [], [don't use CAMD library, disable some sparse matrix functionality])
 
-### Check for COLAMD library
+### Check for COLAMD library.
 
 OCTAVE_CHECK_LIB(colamd, COLAMD,
   [COLAMD library not found.  This will result in some lack of functionality for sparse matrices.],
@@ -2097,7 +2105,7 @@
   [colamd],
   [], [don't use COLAMD library, disable some sparse matrix functionality])
 
-### Check for CCOLAMD library
+### Check for CCOLAMD library.
 
 OCTAVE_CHECK_LIB(ccolamd, CCOLAMD,
   [CCOLAMD library not found.  This will result in some lack of functionality for sparse matrices.],
@@ -2106,8 +2114,8 @@
   [], [don't use CCOLAMD library, disable some sparse matrix functionality])
 
 ### Check for CHOLMOD library.
-### If your cholmod library requires cblas, then you will need to configure
-### with --with-cholmod="-lcholmod -lcblas".
+dnl If your cholmod library requires cblas, then you will need to configure
+dnl with --with-cholmod="-lcholmod -lcblas".
 
 save_LIBS="$LIBS"
 LIBS="$COLAMD_LDFLAGS $COLAMD_LIBS $AMD_LDFLAGS $AMD_LIBS $LAPACK_LIBS $BLAS_LIBS $FLIBS $LIBS"
@@ -2118,7 +2126,7 @@
   [], [don't use CHOLMOD library, disable some sparse matrix functionality])
 LIBS="$save_LIBS"
 
-### Check for SPQR library
+### Check for SPQR library.
 
 save_LIBS="$LIBS"
 LIBS="$CHOLMOD_LIBS $LIBS"
@@ -2129,7 +2137,7 @@
   [C++], [don't use SPQR library, disable some sparse matrix functionality])
 LIBS="$save_LIBS"
 
-### Check for CXSparse library
+### Check for CXSparse library.
 
 OCTAVE_CHECK_LIB(cxsparse, CXSparse,
   [CXSparse library not found.  This will result in some lack of functionality for sparse matrices.],
@@ -2185,7 +2193,7 @@
   [klu.h suitesparse/klu.h klu/klu.h], [klu_solve],
   [], [don't use KLU library, disable some sparse matrix functionality])
 
-### SUITESPARSECONFIG_LIBS added to LIBS above.
+## Restore LIBS after all suitesparse configuration tests
 LIBS="$suitesparse_save_LIBS"
 
 ## Collections of flags.
@@ -2255,11 +2263,11 @@
   LDFLAGS="$SUNDIALS_IDA_LDFLAGS $SUNDIALS_NVECSERIAL_LDFLAGS $KLU_LDFLAGS $BLAS_LDFLAGS $LDFLAGS"
   LIBS="$SUNDIALS_IDA_LIBS $SUNDIALS_NVECSERIAL_LIBS $KLU_LIBS $BLAS_LIBS $FLIBS $LIBS"
   if test -z "$warn_sundials_nvecserial" && test -z "$warn_sundials_ida"; then
-    dnl Any of the following tests could determine that SUNDIALS is incompatible
-    dnl and should be disabled. In that event, they all populate the same
-    dnl variable with appropriate warning messages, and further tests should be
-    dnl skipped if a warning message has already been generated that SUNDIALS is
-    dnl disabled.
+    dnl Any of the following tests could determine that SUNDIALS is
+    dnl incompatible and should be disabled.  In that event, they all populate
+    dnl the same variable with appropriate warning messages, and further tests
+    dnl should be skipped if a warning message has already been generated that
+    dnl SUNDIALS is disabled.
     warn_sundials_disabled=
     if test -z "$warn_sundials_disabled"; then
       OCTAVE_CHECK_SUNDIALS_COMPATIBLE_API
@@ -2281,10 +2289,10 @@
   LIBS="$save_LIBS"
 fi
 
-dnl Define this way instead of with an #if in oct-conf-post.h so that
+dnl Define this way instead of with an #if in oct-conf-post-private.h so that
 dnl the build features script will get the correct value.
 dnl
-dnl The test on the sunlinsol_klu.h header is a bit of a kluge.
+dnl FIXME: The test on the sunlinsol_klu.h header is a bit of a kluge.
 dnl How can we do a better job here?  Do we need to disable sundials
 dnl any tests fail, or can we fix __ode15__.cc so that it still partially
 dnl works when some things are missing (for example, KLU)?
@@ -2420,7 +2428,7 @@
       ## Under Win32 platform, we want JAVA_HOME to be in MSYS format; that is,
       ## without colon and backslashes, as it is also used as path separator.
       ## Use quoted paths as Java may be installed in a path with whitespaces
-      ## (e.g. C:\Program Files\Java\...).
+      ## (e.g., C:\Program Files\Java\...).
       if test -n "$JAVA_HOME"; then
         JAVA_HOME=`cd "$JAVA_HOME" && pwd`
       fi
@@ -2443,11 +2451,14 @@
   fi
 
   ## Check Java version is recent enough.
-  AC_MSG_CHECKING([for Java version])
-  java_version=[`"$JAVA" -version 2>&1 | $SED -n -e 's/^[^ ]* version[^0-9"]*"\([^"]*\)".*/\1/p'`]
-  AC_MSG_RESULT([$java_version])
-  java_major=[`echo $java_version | $SED -e 's/^\([0-9][0-9]*\)\.\([0-9][0-9]*\)\..*$/\1/'`]
-  java_minor=[`echo $java_version | $SED -e 's/^\([0-9][0-9]*\)\.\([0-9][0-9]*\)\..*$/\2/'`]
+  AC_CACHE_CHECK([for Java version],
+    [octave_cv_java_version],
+    [octave_cv_java_version=[`"$JAVA" -version 2>&1 | $SED -n -e 's/^[^ ]* version[^0-9"]*"\([^"]*\)".*/\1/p'`]
+  ])
+
+  java_major=[`echo $octave_cv_java_version | $SED -e 's/^\([0-9][0-9]*\)\.\([0-9][0-9]*\)\..*$/\1/'`]
+  java_minor=[`echo $octave_cv_java_version | $SED -e 's/^\([0-9][0-9]*\)\.\([0-9][0-9]*\)\..*$/\2/'`]
+
   if test $java_major -gt 1 || (test $java_major -eq 1 && test $java_minor -ge 5); then
     :  # Version is OK.  Do nothing.
   else
@@ -2456,7 +2467,7 @@
   fi
 
   ## At this point Win32 systems have enough configuration data.
-  ## We assume that all appropriate variables (e.g. INCLUDE and LIB) already
+  ## We assume that all appropriate variables (e.g., INCLUDE and LIB) already
   ## contain the required paths to compile and link against JDK.
   case $host_os in
     msdosmsvc)
@@ -2494,55 +2505,59 @@
 
   AC_MSG_CHECKING([for $jvmlib])
 
-  if test -z "$JAVA_LDPATH"; then
-    ## Run Java to try and determine library path to libjvm.so.
-    JAVA_TMP_LDPATH=`$JAVA -classpath ${srcdir}/build-aux OctJavaQry JAVA_LDPATH`
-    JAVA_TMP_LDPATH=`echo $JAVA_TMP_LDPATH | $SED -e "s/${PATH_SEPARATOR}/ /g"`
-    for dir in $JAVA_TMP_LDPATH; do
-      if test -f "$dir/$jvmlib"; then
-        JAVA_LDPATH=$dir
-        break
-      fi
-    done
-  fi
-
-  if test -z "$JAVA_LDPATH"; then
-    ## Nothing found.  Try Java again using bootpath argument.
-    JAVA_TMP_LDPATH=`$JAVA -classpath ${srcdir}/build-aux OctJavaQry JAVA_BOOTPATH`
-    JAVA_TMP_LDPATH="${JAVA_TMP_LDPATH} ${JAVA_TMP_LDPATH}/client ${JAVA_TMP_LDPATH}/server"
-    for dir in $JAVA_TMP_LDPATH; do
-      if test -f "$dir/$jvmlib"; then
-        JAVA_LDPATH=$dir
-        break
+  AC_CACHE_VAL([octave_cv_java_ldpath],[
+    if test -z "$JAVA_LDPATH"; then
+      ## Run Java to try and determine library path to libjvm.so.
+      JAVA_TMP_LDPATH=`$JAVA -classpath ${srcdir}/build-aux OctJavaQry JAVA_LDPATH`
+      JAVA_TMP_LDPATH=`echo $JAVA_TMP_LDPATH | $SED -e "s/${PATH_SEPARATOR}/ /g"`
+      for dir in $JAVA_TMP_LDPATH; do
+        if test -f "$dir/$jvmlib"; then
+          JAVA_LDPATH=$dir
+          break
+        fi
+      done
+    fi
+
+    if test -z "$JAVA_LDPATH"; then
+      ## Nothing found.  Try Java again using bootpath argument.
+      JAVA_TMP_LDPATH=`$JAVA -classpath ${srcdir}/build-aux OctJavaQry JAVA_BOOTPATH`
+      JAVA_TMP_LDPATH="${JAVA_TMP_LDPATH} ${JAVA_TMP_LDPATH}/client ${JAVA_TMP_LDPATH}/server"
+      for dir in $JAVA_TMP_LDPATH; do
+        if test -f "$dir/$jvmlib"; then
+          JAVA_LDPATH=$dir
+          break
+        fi
+      done
+    fi
+
+    if test -z "$JAVA_LDPATH"; then
+      ## Java failed to find its own library path.  Guess wildly.
+      JAVA_TMP_LDPATH=`ls -d $JAVA_HOME/jre/lib/*/client`
+      JAVA_TMP_LDPATH="${JAVA_TMP_LDPATH} `ls -d $JAVA_HOME/jre/lib/*/server`"
+      ## Add some paths that might work on Macs.
+      JAVA_TMP_LDPATH="${JAVA_TMP_LDPATH} ${JAVA_HOME}/../Libraries ${JAVA_HOME}/Libraries"
+      ## Add some paths that might work on MinGW
+      JAVA_TMP_LDPATH="${JAVA_TMP_LDPATH} ${JAVA_HOME}/bin/client ${JAVA_HOME}/bin/server"
+      for dir in $JAVA_TMP_LDPATH; do
+        if test -f "$dir/$jvmlib"; then
+          JAVA_LDPATH=$dir
+          break
+        fi
+      done
+    fi
+
+    ## Verify value passed in option --with-java-libdir
+    if test -n "$JAVA_LDPATH"; then
+      if test -f "${JAVA_LDPATH}/$jvmlib"; then
+        :  # libjvm found
+      else
+        JAVA_LDPATH=""
       fi
-    done
-  fi
-
-  if test -z "$JAVA_LDPATH"; then
-    ## Java failed to find its own library path.  Guess wildly.
-    JAVA_TMP_LDPATH=`ls -d $JAVA_HOME/jre/lib/*/client`
-    JAVA_TMP_LDPATH="${JAVA_TMP_LDPATH} `ls -d $JAVA_HOME/jre/lib/*/server`"
-    ## Add some paths that might work on Macs.
-    JAVA_TMP_LDPATH="${JAVA_TMP_LDPATH} ${JAVA_HOME}/../Libraries ${JAVA_HOME}/Libraries"
-    ## Add some paths that might work on MinGW
-    JAVA_TMP_LDPATH="${JAVA_TMP_LDPATH} ${JAVA_HOME}/bin/client ${JAVA_HOME}/bin/server"
-    for dir in $JAVA_TMP_LDPATH; do
-      if test -f "$dir/$jvmlib"; then
-        JAVA_LDPATH=$dir
-        break
-      fi
-    done
-  fi
-
-  ## Verify value passed in option --with-java-libdir
-  if test -n "$JAVA_LDPATH"; then
-    if test -f "${JAVA_LDPATH}/$jvmlib"; then
-      :  # libjvm found
-    else
-      JAVA_LDPATH=""
     fi
-  fi
-
+
+    octave_cv_java_ldpath=$JAVA_LDPATH
+  ])
+  JAVA_LDPATH=$octave_cv_java_ldpath
   if test -z "$JAVA_LDPATH"; then
     AC_MSG_RESULT([not found])
     warn_java="Library $jvmlib not found.  Octave will not be able to call Java methods."
@@ -2572,13 +2587,19 @@
   esac
 
   ## Verify jni.h include file exists.
-  JNI_PATH=`echo $JAVA_CPPFLAGS | $SED -e 's/-I//g'`
-  have_jni=no
-  for dir in $JNI_PATH; do
-    if test -f "${dir}/jni.h"; then have_jni=yes; break; fi
-  done
-  if test $have_jni = yes; then
-    AC_MSG_RESULT([$dir])
+  AC_CACHE_VAL([octave_cv_java_have_jni],[
+    JNI_PATH=`echo $JAVA_CPPFLAGS | $SED -e 's/-I//g'`
+    octave_cv_java_have_jni=no
+    for dir in $JNI_PATH; do
+      if test -f "${dir}/jni.h"; then
+        octave_cv_java_have_jni=yes
+        octave_cv_java_jni_h_path=$dir
+        break
+      fi
+    done
+  ])
+  if test $octave_cv_java_have_jni = yes; then
+    AC_MSG_RESULT([$octave_cv_java_jni_h_path])
   else
     AC_MSG_RESULT([not found])
     warn_java="Include file <jni.h> not found.  Octave will not be able to call Java methods."
@@ -2664,16 +2685,16 @@
 install_build_logs=no
 AC_ARG_ENABLE([install-build-logs],
   [AS_HELP_STRING([--enable-install-build-logs],
-    [install build logs (i.e. config.log) with Octave])],
+    [install build logs (i.e., config.log) with Octave])],
   [if test "$enableval" = yes; then install_build_logs=yes; fi])
 AM_CONDITIONAL([AMCOND_INSTALL_BUILD_LOGS], [test $install_build_logs = yes])
 
-### Determine whether libraries should be linked with visibility attributes
-
-ENABLE_LIB_VISIBILITY_FLAGS=no
+### Determine whether libraries should be linked with visibility attributes.
+
+ENABLE_LIB_VISIBILITY_FLAGS=yes
 AC_ARG_ENABLE(lib-visibility-flags,
-  [AS_HELP_STRING([--enable-lib-visibility-flags],
-    [Build libraries with visibility flags (don't export all symbols). This feature is experimental and should only be used for testing.])],
+  [AS_HELP_STRING([--disable-lib-visibility-flags],
+    [don't build libraries with visibility flags (export all symbols)])],
   [case $enableval in
      yes) ENABLE_LIB_VISIBILITY_FLAGS=yes ;;
      no) ENABLE_LIB_VISIBILITY_FLAGS=no ;;
@@ -2706,7 +2727,7 @@
 AM_CONDITIONAL([AMCOND_LIB_VISIBILITY_FLAGS],
   [test $ENABLE_LIB_VISIBILITY_FLAGS = yes])
 
-### Set flags for symbol visibility
+### Set flags for symbol visibility.
 
 if test $ENABLE_LIB_VISIBILITY_FLAGS = yes; then
   EXTERNAL_DLL_DEFS="-DEXTERNAL_DLL"
@@ -2886,13 +2907,13 @@
       [Define to 1 if compiler supports -Wimplicit-fallthrough warning])])
 fi
 
-### These are recommended by the gnulib bootstrap script:
+### Recommendations from the gnulib bootstrap script.
 
 GNULIB_LINK_DEPS="$FREXPF_LIBM $FREXP_LIBM $GETHOSTNAME_LIB $LIBSOCKET $LIB_CLOCK_GETTIME $LIB_CRYPTO $LIB_GETLOGIN $LIB_NANOSLEEP $LIB_SELECT $LTLIBICONV $LTLIBINTL $LTLIBTHREAD $INTL_MACOSX_LIBS"
 
-### FIXME: This is a kluge to transform $libdir/libiconv.dll.a to -liconv.
-### It would probably be better to fix gnulib to not give us an absolute
-### file name...
+## FIXME: This is a kluge to transform $libdir/libiconv.dll.a to -liconv.
+## It would probably be better to fix gnulib to not give us an absolute
+## file name...
 
 case $host_os in
   mingw*)
@@ -2910,6 +2931,8 @@
 
 AC_SUBST(GNULIB_LINK_DEPS)
 
+### Set variables for link dependencies and options.
+
 BASE_LIBOCTAVE_LINK_DEPS="$CURL_LIBS $SPARSE_XLIBS $ARPACK_LIBS $QRUPDATE_LIBS $FFTW_XLIBS $LAPACK_LIBS $BLAS_LIBS $READLINE_LIBS $TERM_LIBS $LIBGLOB $PCRE_LIBS $DL_LIBS $PTHREAD_LIBS $FLIBS $LIBS"
 
 LIBOCTAVE_LINK_DEPS="$BASE_LIBOCTAVE_LINK_DEPS $GNULIB_LINK_DEPS"
@@ -2998,15 +3021,16 @@
 AC_SUBST(OCTAVE_GUI_LINK_OPTS)
 
 ##############################################################################
-### Configuration tests done
-
-### Restore original compilation flags
+### Configuration tests done.
+
+### Restore original compilation flags.
 CFLAGS="$original_octave_configure_CFLAGS"
 CXXFLAGS="$original_octave_configure_CXXFLAGS"
 
 ### Add footer to config.h
 
-AH_BOTTOM([#include "oct-conf-post.h"])
+AH_BOTTOM([#include "oct-conf-post-private.h"])
+AH_BOTTOM([#include "oct-conf-post-public.h"])
 
 ### Make all AC_DEFINES available to testif feature of test.m function.
 dnl This must reside at the bottom of configure.ac after all AC_DEFINES
@@ -3104,12 +3128,19 @@
   liboctave/octave.pc:liboctave/octave.in.pc
   libinterp/octinterp.pc:libinterp/octinterp.in.pc])
 
-dnl We use a .in.h file for oct-conf-post.h simply to copy it to the build tree
+dnl We use a .in.h file for oct-conf-post-private.h and
+dnl oct-conf-post-public.h simply to copy it to the build tree
 dnl so that we don't have to add the -I${top_srcdir} to any CPPFLAGS variables.
 
-AC_CONFIG_FILES([oct-conf-post.h-tmp:oct-conf-post.in.h])
-AC_CONFIG_COMMANDS([oct-conf-post.h],
-  [$SHELL $srcdir/build-aux/move-if-change oct-conf-post.h-tmp oct-conf-post.h])
+AC_CONFIG_FILES([
+  oct-conf-post-private.h-tmp:oct-conf-post-private.in.h
+  oct-conf-post-public.h-tmp:oct-conf-post-public.in.h])
+
+AC_CONFIG_COMMANDS([oct-conf-post-private.h],
+  [$SHELL $srcdir/build-aux/move-if-change oct-conf-post-private.h-tmp oct-conf-post-private.h])
+
+AC_CONFIG_COMMANDS([oct-conf-post-public.h],
+  [$SHELL $srcdir/build-aux/move-if-change oct-conf-post-public.h-tmp oct-conf-post-public.h])
 
 OCTAVE_CONFIG_MOVE_IF_CHANGE_FILES([
   liboctave/external/mk-f77-def.sh
--- a/doc/interpreter/contributors.in	Sun Aug 28 22:44:49 2022 +0200
+++ b/doc/interpreter/contributors.in	Mon Aug 29 13:58:00 2022 +0200
@@ -34,6 +34,7 @@
 David Billinghurst
 Don Bindner
 Jakub Bogusz
+Gaël Bonithon
 Moritz Borgmann
 Paul Boven
 Richard Bovey
@@ -404,7 +405,8 @@
 Ariel Tankus
 Falk Tannhäuser
 Duncan Temple Lang
-Matthew Tenny
+Matthew Tennyhg
+Remi Thebault
 Kris Thielemans
 Georg Thimm
 Paul Thomas
--- a/doc/interpreter/expr.txi	Sun Aug 28 22:44:49 2022 +0200
+++ b/doc/interpreter/expr.txi	Mon Aug 29 13:58:00 2022 +0200
@@ -817,6 +817,8 @@
 @opindex @code{'}
 @DOCSTRING(ctranspose)
 
+@DOCSTRING(pagectranspose)
+
 @opindex .\
 @DOCSTRING(ldivide)
 
@@ -850,6 +852,8 @@
 @opindex @code{.'}
 @DOCSTRING(transpose)
 
+@DOCSTRING(pagetranspose)
+
 @opindex -
 @DOCSTRING(uminus)
 
--- a/doc/interpreter/genpropdoc.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/doc/interpreter/genpropdoc.m	Mon Aug 29 13:58:00 2022 +0200
@@ -930,6 +930,15 @@
 for the x-axis.  __modemsg__.   @xref{XREFxlim, , @w{xlim function}}.";
         s.valid = valid_2elvec;
 
+      case "xlimitmethod"
+        s.doc = "Method used to determine the x axis limits when the \
+@code{xlimmode} property is @qcode{\"auto\"}.  The default value, \
+@qcode{\"tickaligned\"} makes limits align with the closest ticks.  With \
+value @qcode{\"tight\"} the limits are adjusted to enclose all the graphics \
+objects in the axes, while with value @qcode{\"padded\"}, an additionnal \
+margin of about 7%% of the data extent is added around the objects. \
+@xref{XREFaxis, , @w{axis function}}.";
+
       case "xlimmode"
       case "xminorgrid"
         s.doc = "Control whether minor x grid lines are displayed.";
@@ -975,6 +984,15 @@
 for the y-axis.  __modemsg__.  @xref{XREFylim, , @w{ylim function}}.";
         s.valid = valid_2elvec;
 
+      case "ylimitmethod"
+        s.doc = "Method used to determine the y axis limits when the \
+@code{xlimmode} property is @qcode{\"auto\"}.  The default value, \
+@qcode{\"tickaligned\"} makes limits align with the closest ticks.  With \
+value @qcode{\"tight\"} the limits are adjusted to enclose all the graphics \
+objects in the axes, while with value @qcode{\"padded\"}, an additionnal \
+margin of about 7%% of the data extent is added around the objects. \
+@xref{XREFaxis, , @w{axis function}}.";
+
       case "ylimmode"
       case "yminorgrid"
         s.doc = "Control whether minor y grid lines are displayed.";
@@ -1013,6 +1031,15 @@
 for the z-axis.  __modemsg__.  @xref{XREFzlim, , @w{zlim function}}.";
         s.valid = valid_2elvec;
 
+      case "zlimitmethod"
+        s.doc = "Method used to determine the z axis limits when the \
+@code{xlimmode} property is @qcode{\"auto\"}.  The default value, \
+@qcode{\"tickaligned\"} makes limits align with the closest ticks.  With \
+value @qcode{\"tight\"} the limits are adjusted to enclose all the graphics \
+objects in the axes, while with value @qcode{\"padded\"}, an additionnal \
+margin of about 7%% of the data extent is added around the objects. \
+@xref{XREFaxis, , @w{axis function}}.";
+
       case "zlimmode"
       case "zminorgrid"
         s.doc = "Control whether minor z grid lines are displayed.";
@@ -1064,6 +1091,29 @@
 before rendering.\n\
 @xref{XREFinterpreterusage, , @w{Use of the interpreter property}}.";
 
+      case "itemhitfcn"
+        s.doc = "Callback function which is executed when a legend item \
+is clicked.  @xref{Callbacks, , @w{Callbacks section}}.\n\
+\n\
+The callback function must have the following prototype \
+@code{fcn (hlegend, evnt)}, where @code{hlegend} is the legend object handle \
+and @code{evnt} is a structure with the following fields:\n\
+@table @code\n\
+@item Peer\n\
+Handle of the plot object to which the clicked item is associated.\n\
+@item Region\n\
+May be @qcode{\"icon\"} or @qcode{\"label\"} depending on which part of \
+the item is clicked.\n\
+@item SelectionType\n\
+One of @qcode{\"normal\"}, @qcode{\"extend\"}, @qcode{\"open\"}, or \
+@qcode{\"alt\"}. \
+@xref{XREFfigureselectiontype, , @w{Figure @qcode{\"selectiontype\"}}}.\n\
+@item Source\n\
+Handle of the legend object.\n\
+@item EventName\n\
+Name is @qcode{\"ItemHit\"}.\n\
+@end table";
+
       case "location"
         s.doc = "Control the location of the legend.";
 
@@ -2077,8 +2127,8 @@
     if (isempty (props))
         props = {"autoupdate", "box", "color", "edgecolor", "fontangle", ...
                  "fontname", "fontsize", "fontunits", "fontweight", ...
-                 "location", "numcolumns", "orientation", "position", ...
-                 "string", "textcolor", "title", "units"};
+                 "itemhitfcn", "location", "numcolumns", "orientation", ...
+                 "position", "string", "textcolor", "title", "units"};
     endif
   elseif (strcmp (objname, "scatter"))
     ## Make sure to get a scatter object independent of graphics toolkit
--- a/doc/interpreter/gui.txi	Sun Aug 28 22:44:49 2022 +0200
+++ b/doc/interpreter/gui.txi	Mon Aug 29 13:58:00 2022 +0200
@@ -108,6 +108,8 @@
 toolkit, although some functionality is available with the @code{fltk} toolkit.
 There is no support for the @code{gnuplot} toolkit.
 
+@DOCSTRING(uifigure)
+
 @DOCSTRING(uipanel)
 
 @DOCSTRING(uibuttongroup)
--- a/doc/interpreter/matrix.txi	Sun Aug 28 22:44:49 2022 +0200
+++ b/doc/interpreter/matrix.txi	Mon Aug 29 13:58:00 2022 +0200
@@ -112,8 +112,6 @@
 
 @DOCSTRING(circshift)
 
-@DOCSTRING(shift)
-
 @DOCSTRING(shiftdim)
 
 @DOCSTRING(sort)
--- a/doc/interpreter/mk-doc-cache.pl	Sun Aug 28 22:44:49 2022 +0200
+++ b/doc/interpreter/mk-doc-cache.pl	Mon Aug 29 13:58:00 2022 +0200
@@ -34,25 +34,22 @@
 use File::Temp;
 
 my $doc_delim = "\x{1d}";
-my $tex_delim_pat = qr/\Q-*- texinfo -*-\E/;
+my $tex_delim_ptn = qr/\Q-*- texinfo -*-\E/;
 
-## Returns a File::Temp object with texinfo code.
+## Returns a File::Temp object with Texinfo code.
 sub make_texinfo_file
 {
   my $srcdir = shift;
   my $macro_fpath = shift;
   my @docstrings = @_;
 
-  my $t_file = File::Temp->new (UNLINK => 1);
+  my $tmpfile = File::Temp->new (UNLINK => 1);
 
   ## Only the first file is the macro file.  Copy its contents verbatim.
-  open (my $macro_fh, "<", $macro_fpath)
+  open (my $FH_macro, "<", $macro_fpath)
     or die "Unable to open $macro_fpath for reading: $!\n";
-  while (<$macro_fh>)
-    {
-      print {$t_file} $_;
-    }
-  close ($macro_fh);
+  while (<$FH_macro>) {  print {$tmpfile} $_;  }
+  close ($FH_macro);
 
   foreach my $filepath (@docstrings)
     {
@@ -64,35 +61,44 @@
           ## tree, from released sources.
           $filepath = File::Spec->catfile ($srcdir, $filepath);
         }
-      open (my $fh, "<", $filepath)
+      open (my $FH, "<", $filepath)
         or die "Unable to open $filepath for reading: $!\n";
 
       my $in_header = 1;
-      while (my $line = <$fh>)
+      while (my $line = <$FH>)
         {
           ## DOCSTRINGS header ends once we find the first function.
           if ($in_header && $line =~ m/^$doc_delim/)
             {
               $in_header = 0;
             }
-          next if $in_header;
-          next if $line =~ /$tex_delim_pat/;
+          next if ($in_header);
+          next if ($line =~ /$tex_delim_ptn/);
 
-          $line =~ s/\@seealso/\@xseealso/g;
+          ## Change @seealso to private @xseealso macro
+          if ($line =~ m'@seealso')
+          {
+            ## Combine @seealso macro spread over multiple lines
+            while ($line !~ m/}$/) {  $line .= <$FH>;  }
 
-          ## escape {}@ characters for texinfo
-          $line =~ s/([{}\@])/\@$1/g
-            if $line =~ m/^$doc_delim/;
+            ## escape @ characters in old-style class names like @ftp
+            $line =~ s/\@(\w)/\@\@$1/g;
+            $line =~ s'@@seealso'@xseealso';
+          }
 
-          print {$t_file} $line;
+          ## escape {}@ characters in Texinfo anchor name (e.g., @ftp/dir.m)
+          $line =~ s/([{}@])/\@$1/g if ($line =~ m/^$doc_delim/);
+
+          print {$tmpfile} $line;
         }
-      close ($fh);
+      close ($FH);
     }
 
-  print {$t_file} $doc_delim;
+  print {$tmpfile} $doc_delim;
 
-  $t_file->flush ();
-  return $t_file;
+  $tmpfile->flush ();
+
+  return $tmpfile;
 }
 
 sub get_info_text
@@ -106,7 +112,7 @@
     if (! defined $info_text);
 
   die "makeinfo produced no output!"
-    if ! $info_text;
+    if (! $info_text);
 
   return $info_text;
 }
@@ -117,7 +123,7 @@
 
   ## Constant patterns.  We only check for two underscores at the end,
   ## and not at the start, to also skip @class/__method__
-  my $private_name_pat = qr/__$/;
+  my $private_name_ptn = qr/__$/;
 
   my @formatted = ();
 
@@ -135,7 +141,7 @@
 
       my ($symbol, $doc) = split (/[\r\n]/, $block, 2);
 
-      next if (length ($symbol) > 2 && $symbol =~ m/$private_name_pat/);
+      next if (length ($symbol) > 2 && $symbol =~ m/$private_name_ptn/);
 
       if (! defined ($doc))
       {
@@ -156,6 +162,7 @@
 
       push (@formatted, [($symbol, $doc, $first_sentence)]);
     }
+
   return @formatted;
 }
 
@@ -164,22 +171,26 @@
   my ($str) = @_;
   my $len = length ($str);
 
-  print "# name: <cell-element>\n";
-  print "# type: sq_string\n";
-  print "# elements: 1\n";
-  print "# length: $len\n";
-  print "$str\n\n\n";
+  print <<__END_OF_ELEMENT__;
+# name: <cell-element>
+# type: sq_string
+# elements: 1
+# length: $len
+$str\n\n
+__END_OF_ELEMENT__
 }
 
 sub print_cache
 {
   my $num = @_;
 
-  print "# created by mk-doc-cache.pl\n";
-  print "# name: cache\n";
-  print "# type: cell\n";
-  print "# rows: 3\n";
-  print "# columns: $num\n";
+  print <<__END_OF_CACHE_HDR__;
+# created by mk-doc-cache.pl
+# name: cache
+# type: cell
+# rows: 3
+# columns: $num
+__END_OF_CACHE_HDR__
 
   foreach my $elt (@_)
     {
@@ -194,6 +205,8 @@
     }
 }
 
+## FIXME: This is a very C/C++ way of coding things.
+## Perl convention would just be to have the executable code at end of file.
 sub main
 {
   my $srcdir = shift;
--- a/doc/interpreter/sparse.txi	Sun Aug 28 22:44:49 2022 +0200
+++ b/doc/interpreter/sparse.txi	Mon Aug 29 13:58:00 2022 +0200
@@ -530,13 +530,6 @@
 @noindent
 returns a full matrix as can be seen.
 
-
-Additionally, if @code{sparse_auto_mutate} is true, all sparse functions
-test the amount of memory occupied by the sparse matrix to see if the
-amount of storage used is larger than the amount used by the full
-equivalent.  Therefore @code{speye (2) * 1} will return a full matrix as
-the memory used is smaller for the full version than the sparse version.
-
 As all of the mixed operators and functions between full and sparse
 matrices exist, in general this does not cause any problems.  However,
 one area where it does cause a problem is where a sparse matrix is
@@ -561,11 +554,6 @@
 always returns a sparse matrix, even if the memory used will be larger
 than its full representation.
 
-@DOCSTRING(sparse_auto_mutate)
-
-Note that the @code{sparse_auto_mutate} option is incompatible with
-@sc{matlab}, and so it is off by default.
-
 @node Mathematical Considerations
 @subsubsection Mathematical Considerations
 
--- a/etc/HACKING.md	Sun Aug 28 22:44:49 2022 +0200
+++ b/etc/HACKING.md	Mon Aug 29 13:58:00 2022 +0200
@@ -399,6 +399,80 @@
 These guidelines also appear in the GNU libtool manual, see
 https://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html.
 
+Merging the default branch to stable before a release
+-----------------------------------------------------
+
+To merge default to stable for a release with version == MAJOR:
+
+NOTE, I use two separate repos, one in `/path/to/octave-stable` that is
+updated to the stable branch and one in `/path/to/octave-default` that
+is updated to the default branch.
+
+1. Update the repo in `/path/to/octave-stable` to the most recent change
+   on the stable branch.  Ensure that there are no pending changes (be
+   careful to avoid wiping out any changes you are currently working
+   on!):
+
+       cd /path/to/octave-stable
+       hg update -C stable
+
+2. Merge default to stable (there should never be any conflicts here;
+   you are just making the stable branch be whatever is on the current
+   default branch):
+
+       hg merge default
+
+3. Commit the change (replace VERSION with the correct version; it
+   should be of the form MAJOR.1.0):
+
+       hg commit -m "maint: Merge default to stable to begin VERSION release process."
+
+4. Bump version numbers and release date in `configure.ac` for pre-release:
+
+  * Set version in AC_INIT to MAJOR.0.1
+  * OCTAVE_MAJOR_VERSION should already be correct.
+  * Set OCTAVE_MINOR_VERSION to 0.
+  * Set OCTAVE_PATCH_VERSION to 1.
+  * Set OCTAVE_RELEASE_DATE to the current date.
+  * Set the year in OCTAVE_COPYRIGHT to the current year.  The
+    copyright dates in the source files should have already been
+    updated during the development cycle.  If not, that should be done
+    in a separate change before the merge.
+  * OCTAVE_API_VERSION and shared library version numbers may be
+    updated in a separate changeset just prior to creating the first
+    test release.
+
+       hg commit  ## Use commit message similar to the one in 8f8fab4c93ae
+
+5. Update the repo in `/path/to/octave-default` to the most recent change
+   on the default branch.  Ensure that there are no pending changes (be
+   careful to avoid wiping out any changes you are currently working
+   on!):
+
+       cd /path/to/octave-default
+       hg update -C default
+
+6. Merge stable back to default (there should not be conflicts in this
+   merge):
+
+       hg merge stable
+       hg commit -m "maint: Merge stable to default."
+
+7. Bump versions in `configure.ac` to begin active development of MAJOR+1:
+
+  * Set version in AC_INIT to MAJOR+1.0.0
+  * Set OCTAVE_MAJOR_VERSION to MAJOR+1
+  * Set OCTAVE_MINOR_VERSION to 0
+  * Set OCTAVE_PATCH_VERSION to 0
+
+       hg commit  ## Use commit message similar to the one in 1455418a5c4c
+
+8. Remove functions and properties deprecated in MAJOR-1 (see ecf207896f76,
+   for example)
+
+9. Update NEWS file for next development cycle (see 0ec5eaabaf2c, for
+   example).
+
 
 ################################################################################
 
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/etc/NEWS.8.md	Mon Aug 29 13:58:00 2022 +0200
@@ -0,0 +1,127 @@
+Summary of important user-visible changes for version 8 (yyyy-mm-dd):
+---------------------------------------------------------------------
+
+### General improvements
+
+- Octave's libraries are now built using symbol visibility by default.
+That means that less symbols are exported from these libraries.
+Configure with `--disable-lib-visibility-flags` to export all symbols
+(as in previous versions).
+
+- `filter` is now 5X faster, which also speeds up `deconv`, `fftfilt`
+and `arma_rnd` by the same amount.
+
+- `integral` can now output a second argument passing the error
+measurement used by the underlying integrator.
+
+- `perms` now accepts a second argument "unique" to return only unique
+permutations for inputs with repeated elements.  It is faster and takes
+less memory to call `perms ('aaaabbbbcccc', "unique")` than to call
+`unique (perms ('aaaabbbbcccc'), "rows")`.
+
+- `quadgk` can now accept the `ArrayValued` input parameter to handle
+array-valued input functions.
+
+### Graphical User Interface
+
+
+### Graphics backend
+
+- Additional properties have been added to the `figure` graphics object:
+    * `"innerposition"` (equivalent to `"position"`)
+    * `"windowstate"` (not yet implemented)
+
+### Matlab compatibility
+
+- `inline` functions now support all Matlab methods.  The performance
+  of `inline` functions has also been improved.
+
+- `sub2ind` now supports index values outside of the size specified by
+  the subscripts.
+
+- `cylinder` now accepts a scalar for the radius argument.
+
+- `clock` now has an optional second output `ISDST` which indicates if
+  Daylight Savings Time is in effect for the system's time zone.
+
+- `print` now accepts option `-image` to specify the "opengl" renderer
+  and `-vector` to specify the "painters" renderer.
+
+- `format` now accepts the option "default", which is equivalent to
+  calling `format` without any options to reset the default state.
+
+- `quadgk` now stops iterating when `error <= tolerance` while the previous
+  condition was `error < tolerance`.
+
+- `var` and `std` now optionally output a second argument containing the mean
+  or weighted mean.
+
+- `integral` can now accept the 'ArrayValued' option in combination with
+  'RelTol' and 'WayPoints'.
+
+- The default state for certain graphics properties has been made
+  consistent with Matlab.
+
+  Object      | Property         | Default State
+  ------------|------------------|------------
+  `figure`    | `"dockcontrols"` | `"on"`
+
+### Alphabetical list of new functions added in Octave 8
+
+* `pagectranspose`
+* `pagetranspose`
+* `uifigure`
+
+### Deprecated functions, properties, and operators
+
+The following functions and properties have been deprecated in Octave 8
+and will be removed from Octave 10 (or whatever version is the second
+major release after 8):
+
+- Functions
+
+  Function               | Replacement
+  -----------------------|------------------
+  `shift`                | `circshift`
+  `sparse_auto_mutate`   | none (see below)
+
+- The `sparse_auto_mutate` function no longer has any effect on Octave's
+  behavior.  Previously, after calling `sparse_auto_mutate (true)`,
+  Octave would automatically convert sparse matrices to full when a
+  sparse matrix required more memory than simply using full matrix
+  storage.  This setting was `false` by default for compatibility with
+  Matlab.  Now you must manually convert to full storage when desired.
+
+
+- Properties
+
+  The following property names are discouraged, but there is no fixed
+  date for their removal.
+
+  Object           | Property    | Replacement
+  -----------------|-------------|------------
+  `uimenu`         | `label`     | `text`
+  `uimenu`         | `callback`  | `menuselectedfcn`
+
+The following functions were deprecated in Octave 6 and have been removed
+from Octave 8.
+
+- Functions
+
+  Function               | Replacement
+  -----------------------|------------------
+  `runtests`             | `oruntests`
+
+- The environment variable used by `mkoctfile` for linker flags is now
+  `LDFLAGS` rather than `LFLAGS`.  `LFLAGS` was deprecated in Octave 6,
+  and will be removed in a future version of Octave.
+
+### Old release news
+
+- [Octave 7.x](etc/NEWS.7)
+- [Octave 6.x](etc/NEWS.6)
+- [Octave 5.x](etc/NEWS.5)
+- [Octave 4.x](etc/NEWS.4)
+- [Octave 3.x](etc/NEWS.3)
+- [Octave 2.x](etc/NEWS.2)
+- [Octave 1.x](etc/NEWS.1)
--- a/etc/module.mk	Sun Aug 28 22:44:49 2022 +0200
+++ b/etc/module.mk	Mon Aug 29 13:58:00 2022 +0200
@@ -12,6 +12,7 @@
   %reldir%/NEWS.5.md \
   %reldir%/NEWS.6.md \
   %reldir%/NEWS.7.md \
+  %reldir%/NEWS.8.md \
   %reldir%/gdbinit
 
 %canon_reldir%_EXTRA_DIST += \
--- a/libgui/graphics/FigureWindow.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libgui/graphics/FigureWindow.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -30,6 +30,7 @@
 #include <QMenu>
 
 #include "FigureWindow.h"
+#include "gui-preferences-global.h"
 
 namespace octave
 {
@@ -38,7 +39,7 @@
     : FigureWindowBase (xparent)
   {
     // set icon from application resources
-    setWindowIcon (QIcon (":/actions/icons/graphic_logo_Figure.png"));
+    setWindowIcon (QIcon (global_icon_paths.at (ICON_THEME_OCTAVE)));
   }
 
   FigureWindow::~FigureWindow (void)
--- a/libgui/graphics/Logger.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libgui/graphics/Logger.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -65,13 +65,13 @@
     return s_instance;
   }
 
-#define STATIC_LOGGER(fun) \
-  void Logger::fun (const char *fmt, ...) \
+#define STATIC_LOGGER(fcn) \
+  void Logger::fcn (const char *fmt, ...) \
   { \
     QMutexLocker lock (s_mutex); \
     va_list vl; \
     va_start (vl, fmt); \
-    instance ()->fun ## V (fmt, vl); \
+    instance ()->fcn ## V (fmt, vl); \
     va_end (vl); \
   }
 
--- a/libgui/graphics/Menu.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libgui/graphics/Menu.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -294,13 +294,13 @@
 
     if (action->isCheckable ())
       action->setChecked (! action->isChecked ());
-    emit gh_callback_event (m_handle, "callback");
+    emit gh_callback_event (m_handle, "menuselectedfcn");
   }
 
   void
   Menu::actionHovered (void)
   {
-    emit gh_callback_event (m_handle, "callback");
+    emit gh_callback_event (m_handle, "menuselectedfcn");
   }
 
   void
--- a/libgui/graphics/ToolBarButton.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libgui/graphics/ToolBarButton.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -29,11 +29,13 @@
 
 #include <QAction>
 #include <QIcon>
+#include <QString>
 #include <QWidget>
 
 #include "ToolBarButton.h"
 #include "QtHandlesUtils.h"
 #include "octave-qobject.h"
+#include "gui-preferences-global.h"
 
 namespace octave
 {
@@ -155,9 +157,7 @@
   template <typename T>
   QIcon ToolBarButton<T>::get_icon (const std::string& name)
   {
-    octave::resource_manager& rmgr = m_octave_qobj.get_resource_manager ();
-
-    return rmgr.icon (QString::fromStdString (name));
+    return QIcon (global_icon_paths.at (ICON_THEME_OCTAVE) + QString::fromStdString (name) + ".png");
   }
 
 }
--- a/libgui/graphics/qopengl-functions.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libgui/graphics/qopengl-functions.h	Mon Aug 29 13:58:00 2022 +0200
@@ -63,9 +63,9 @@
 
 #if defined (HAVE_QOPENGLFUNCTIONS_1_1)
 
-    void glAlphaFunc (GLenum func, GLclampf ref)
+    void glAlphaFunc (GLenum fcn, GLclampf ref)
     {
-      m_glfcns.glAlphaFunc (func, ref);
+      m_glfcns.glAlphaFunc (fcn, ref);
     }
 
     void glBegin (GLenum mode)
@@ -150,9 +150,9 @@
       m_glfcns.glDeleteTextures (n, textures);
     }
 
-    void glDepthFunc (GLenum func)
+    void glDepthFunc (GLenum fcn)
     {
-      m_glfcns.glDepthFunc (func);
+      m_glfcns.glDepthFunc (fcn);
     }
 
     void glDisable (GLenum cap)
--- a/libgui/qterminal/libqterminal/unix/kpty.cpp	Sun Aug 28 22:44:49 2022 +0200
+++ b/libgui/qterminal/libqterminal/unix/kpty.cpp	Mon Aug 29 13:58:00 2022 +0200
@@ -294,8 +294,8 @@
   {
     for (const char* s4 = "0123456789abcdef"; *s4; s4++)
     {
-      ptyName = QString().sprintf("/dev/pty%c%c", *s3, *s4).toAscii();
-      d->ttyName = QString().sprintf("/dev/tty%c%c", *s3, *s4).toAscii();
+      ptyName = QString().sprintf("/dev/pty%c%c", *s3, *s4).toLatin1();
+      d->ttyName = QString().sprintf("/dev/tty%c%c", *s3, *s4).toLatin1();
 
       d->masterFd = ::open(ptyName.data(), O_RDWR);
       if (d->masterFd >= 0)
--- a/libgui/src/command-widget.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libgui/src/command-widget.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -32,7 +32,8 @@
 #include <QLabel>
 #include <QLineEdit>
 #include <QPushButton>
-#include <QTextBrowser>
+#include <QTextEdit>
+#include <QTextBlock>
 #include <QVBoxLayout>
 
 #include "command-widget.h"
@@ -47,44 +48,29 @@
 
 namespace octave
 {
-  command_widget::command_widget (base_qobject&, QWidget *p)
+  command_widget::command_widget (base_qobject& oct_qobj, QWidget *p)
     : QWidget (p), m_incomplete_parse (false),
-      m_prompt (new QLabel ("", this)),
-      m_line_edit (new QLineEdit (this)),
-      m_output_display (new QTextBrowser (this)),
-      m_input_color (QColor ())
+      m_prompt (QString ()),
+      m_console (new console (this, oct_qobj))
   {
     QPushButton *pause_button = new QPushButton (tr("Pause"), this);
     QPushButton *stop_button = new QPushButton (tr("Stop"), this);
     QPushButton *resume_button = new QPushButton (tr("Continue"), this);
 
-    QGroupBox *input_group_box = new QGroupBox (tr("Command Input"));
+    QGroupBox *input_group_box = new QGroupBox ();
     QHBoxLayout *input_layout = new QHBoxLayout;
-    input_layout->addWidget (m_prompt);
-    input_layout->addWidget (m_line_edit);
     input_layout->addWidget (pause_button);
     input_layout->addWidget (stop_button);
     input_layout->addWidget (resume_button);
     input_group_box->setLayout (input_layout);
 
-    QGroupBox *output_group_box = new QGroupBox (tr("Command Output"));
-    QHBoxLayout *output_layout = new QHBoxLayout ();
-    output_layout->addWidget (m_output_display);
-    output_group_box->setLayout (output_layout);
-
     QVBoxLayout *main_layout = new QVBoxLayout ();
-    main_layout->addWidget (output_group_box);
+    main_layout->addWidget (m_console);
     main_layout->addWidget (input_group_box);
 
     setLayout (main_layout);
 
-    setFocusProxy (m_line_edit);
-
-    connect (m_line_edit, &QLineEdit::returnPressed,
-             this, &command_widget::accept_input_line);
-
-    connect (this, &command_widget::clear_line_edit,
-             m_line_edit, &QLineEdit::clear);
+    setFocusProxy (m_console);
 
     connect (pause_button, &QPushButton::clicked,
              this, &command_widget::interpreter_pause);
@@ -94,39 +80,47 @@
 
     connect (stop_button, &QPushButton::clicked,
              this, &command_widget::interpreter_stop);
+
+    connect (this, &command_widget::new_command_line_signal,
+             m_console, &console::new_command_line);
+
+    insert_interpreter_output ("\n\n    Welcome to Octave\n\n");
+
+  }
+
+  void command_widget::init_command_prompt ()
+  {
+    emit interpreter_event
+      ([=] (interpreter& interp)
+       {
+         // INTERPRETER THREAD
+
+         event_manager& evmgr = interp.get_event_manager ();
+         input_system& input_sys = interp.get_input_system ();
+         std::string prompt = input_sys.PS1 ();
+         evmgr.update_prompt (command_editor::decode_prompt_string (prompt));
+
+         emit new_command_line_signal ();
+       });
   }
 
   void command_widget::update_prompt (const QString& prompt)
   {
-    m_prompt->setText (prompt);
+    m_prompt = prompt;
+  }
+
+  QString command_widget::prompt ()
+  {
+    return m_prompt;
   }
 
   void command_widget::insert_interpreter_output (const QString& msg)
   {
-    QTextCursor cursor = m_output_display->textCursor ();
-
-    cursor.insertText (msg);
-
-    m_output_display->setTextCursor (cursor);
+    m_console->append (msg);
   }
 
-  void command_widget::accept_input_line (void)
+  void command_widget::process_input_line (const QString& input_line)
   {
-    QTextCursor cursor = m_output_display->textCursor ();
-
-    QString input_line = m_line_edit->text ();
-
-    QString style;
-    if (! m_incomplete_parse)
-      {
-        style = QString ("<div style=\"color:%1; font-weight:bold;\">[in]:</div> ")
-                .arg (m_input_color.name ());
-        m_output_display->insertHtml (style);
-      }
-    style = QString ("<div style=\"color:%1\">%2</div><br>")
-            .arg (m_input_color.name ()).arg (input_line);
-    m_output_display->insertHtml (style);
-
     emit interpreter_event
       ([=] (interpreter& interp)
        {
@@ -142,9 +136,10 @@
            = m_incomplete_parse ? input_sys.PS2 () : input_sys.PS1 ();
 
          evmgr.update_prompt (command_editor::decode_prompt_string (prompt));
+
+         emit new_command_line_signal ();
        });
 
-    emit clear_line_edit ();
   }
 
   void command_widget::notice_settings (const gui_settings *settings)
@@ -158,20 +153,150 @@
     term_font.setPointSize
       (settings->value (cs_font_size).toInt ());
 
-    m_line_edit->setFont (term_font);
-    m_output_display->setFont (term_font);
+    m_console->setFont (term_font);
 
     // Colors
     int mode = settings->value (cs_color_mode).toInt ();
     QColor fgc = settings->color_value (cs_colors[0], mode);
     QColor bgc = settings->color_value (cs_colors[1], mode);
 
-    m_output_display->setStyleSheet (QString ("color: %1; background-color:%2;")
+    m_console->setStyleSheet (QString ("color: %1; background-color:%2;")
                                      .arg (fgc.name ()).arg (bgc.name ()));
-    m_line_edit->setStyleSheet (QString ("color: %1; background-color:%2;")
-                                .arg (fgc.name ()).arg (bgc.name ()));
+  }
+
+
+  // The console itself using QScintilla.
+  // This implementation is partly based on the basic concept of
+  // "qpconsole" as proposed by user "DerManu" in the Qt-forum thread
+  // https://forum.qt.io/topic/28765/command-terminal-using-qtextedit
+
+  console::console (command_widget *p, base_qobject&)
+    : QsciScintilla (p),
+      m_command_position (-1),
+      m_cursor_position (0),
+      m_text_changed (false),
+      m_command_widget (p),
+      m_last_key_string (QString ())
+  {
+    setMargins (0);
+    setWrapMode (QsciScintilla::WrapWord);
+
+    connect (this, SIGNAL (cursorPositionChanged (int, int)),
+             this, SLOT (cursor_position_changed (int, int)));
+
+    connect (this, SIGNAL (textChanged (void)),
+             this, SLOT (text_changed (void)));
+
+    connect (this, SIGNAL (modificationAttempted (void)),
+             this, SLOT (move_cursor_to_end (void)));
+  }
+
+  // Prepare a new command line with the current prompt
+  void console::new_command_line (const QString& command)
+  {
+    if (! text (lines () -1).isEmpty ())
+      append ("\n");
+
+    append_string (m_command_widget->prompt ());
+
+    int line, index;
+    getCursorPosition (&line,&index);
+    m_command_position = positionFromLineIndex (line, index);
+
+    append_string (command);
+  }
+
+  // Accept the current command line (or block)
+  void console::accept_command_line ()
+  {
+    QString input_line = text (lines () - 1);
+
+    if (input_line.startsWith (m_command_widget->prompt ()))
+      input_line.remove(0, m_command_widget->prompt ().length ());
+
+    input_line = input_line.trimmed ();
+
+    append_string ("\n");
+
+    if (input_line.isEmpty ())
+      new_command_line ();
+    else
+      m_command_widget->process_input_line (input_line);
+  }
+
+  // Execute a command
+  void console::execute_command (const QString& command)
+  {
+    if (command.trimmed ().isEmpty ())
+      return;
 
-    m_input_color = interpolate_color (fgc, bgc, 0.75, 0.5);
+    new_command_line (command);
+    accept_command_line ();
+  }
+
+  // Append a string and update the curdor püosition
+  void console::append_string (const QString& string)
+  {
+    setReadOnly (false);
+    append (string);
+
+    int line, index;
+    lineIndexFromPosition (text ().length (), &line, &index);
+
+    setCursorPosition (line, index);
+  }
+
+  // Cursor position changed: Are we in the command line or not?
+  void console::cursor_position_changed (int line, int col)
+  {
+    m_cursor_position = positionFromLineIndex (line, col);
+    if (m_cursor_position < m_command_position)
+      {
+        // We are in the read only area
+        if (m_text_changed && (m_cursor_position == m_command_position - 1))
+          {
+            setReadOnly (false);
+            insert (m_command_widget->prompt ().right (1)); // And here we have tried to remove the prompt by Backspace
+            setCursorPosition (line+1, col);
+          }
+        setReadOnly (true);
+      }
+    else
+      setReadOnly (false);  // Writable area
+
+    m_text_changed = false;
+  }
+
+  // User attempted to type on read only mode: move cursor at end and allow
+  // editing
+  void console::move_cursor_to_end (void)
+  {
+    if ((! m_last_key_string.isEmpty ()) && (m_last_key_string.at (0).isPrint ()))
+      {
+        append_string (m_last_key_string);
+        setReadOnly (true); // Avoid that changing read only text is done afterwards
+      }
+  }
+
+  // Text has changed: is cursor still in "writable" area?
+  // This signal seems to be emitted before cursor position changed.
+  void console::text_changed (void)
+  {
+    m_text_changed = true;
+  }
+
+  // Re-implement key event
+  void console::keyPressEvent (QKeyEvent *e)
+  {
+    if (e->key () == Qt::Key_Return)
+      // On "return", accept the current command line
+      accept_command_line ();
+    else
+      {
+        // Otherwise, store text process the expected event
+        m_last_key_string = e->text ();
+        QsciScintilla::keyPressEvent(e);
+      }
   }
 
 }
--- a/libgui/src/command-widget.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libgui/src/command-widget.h	Mon Aug 29 13:58:00 2022 +0200
@@ -28,17 +28,55 @@
 
 #include <QWidget>
 
+#include <Qsci/qsciscintilla.h>
+
 #include "octave-qobject.h"
 #include "gui-settings.h"
 
-class QLabel;
-class QLineEdit;
-class QStrung;
-class QTextBrowser;
+class QsciScintilla;
 
 namespace octave
 {
   class base_qobject;
+  class command_widget;
+
+  class console : public QsciScintilla
+  {
+    Q_OBJECT
+
+  public:
+
+    console (command_widget *p, base_qobject& oct_qobj);
+
+  public slots:
+
+    void cursor_position_changed (int line, int col);
+
+    void text_changed (void);
+
+    void move_cursor_to_end (void);
+
+    void new_command_line (const QString& command = QString ());
+
+    void execute_command (const QString& command);
+
+  protected:
+
+    void keyPressEvent (QKeyEvent *e);
+
+  private:
+
+    void append_string (const QString& string);
+
+    void accept_command_line (void);
+
+    int m_command_position;
+    int m_cursor_position;
+    bool m_text_changed;
+    command_widget *m_command_widget;
+    QString m_last_key_string;
+
+  };
 
   class command_widget : public QWidget
   {
@@ -48,6 +86,12 @@
 
     command_widget (base_qobject& oct_qobj, QWidget *p);
 
+    console * get_console ( ) { return m_console; };
+
+    void init_command_prompt ();
+
+    QString prompt (void);
+
   signals:
 
     void clear_line_edit (void);
@@ -59,25 +103,23 @@
     void interpreter_event (const fcn_callback& fcn);
     void interpreter_event (const meth_callback& meth);
 
+    void new_command_line_signal (const QString& command = QString ());
+
   public slots:
 
+    void process_input_line (const QString& input_line);
+
     void update_prompt (const QString& prompt);
 
     void insert_interpreter_output (const QString& msg);
 
     void notice_settings (const gui_settings *settings);
 
-  protected slots:
-
-    void accept_input_line (void);
-
   private:
 
     bool m_incomplete_parse;
-    QLabel *m_prompt;
-    QLineEdit *m_line_edit;
-    QTextBrowser *m_output_display;
-    QColor m_input_color;
+    QString m_prompt;
+    console *m_console;
   };
 }
 
--- a/libgui/src/community-news.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libgui/src/community-news.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -33,6 +33,7 @@
 
 #include "community-news.h"
 #include "gui-utils.h"
+#include "gui-preferences-dw.h"
 #include "gui-preferences-nr.h"
 #include "news-reader.h"
 #include "octave-qobject.h"
@@ -78,9 +79,14 @@
     resource_manager& rmgr = oct_qobj.get_resource_manager ();
     gui_settings *settings = rmgr.get_settings ();
 
-    // FIXME: should be configurable...  See also the icon for the
-    // release notes window.
-    QString icon = ":/actions/icons/logo.png";
+    QString icon;
+    QString icon_set = settings->value (dw_icon_set).toString ();
+    if (icon_set != "NONE")
+      // No extra icon for Community news, take the one of the release notes
+      icon = dw_icon_set_names[icon_set] + "ReleaseWidget.png";
+    else
+      icon = dw_icon_set_names[icon_set];
+
     setWindowIcon (QIcon (icon));
 
     // FIXME: This is a news reader preference, so shouldn't it be used
--- a/libgui/src/documentation-dock-widget.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libgui/src/documentation-dock-widget.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -38,7 +38,6 @@
     : octave_dock_widget ("DocumentationDockWidget", p, oct_qobj),
       m_docs (new documentation (this, oct_qobj))
   {
-    setWindowIcon (QIcon (":/actions/icons/logo.png"));
     set_title (tr ("Documentation"));
     setStatusTip (tr ("See the documentation for help."));
 
--- a/libgui/src/documentation.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libgui/src/documentation.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -96,7 +96,7 @@
     m_help_engine->setProperty ("_q_readonly",
                                 QVariant::fromValue<bool> (true));
 
-    QString tmpdir = QDir::tempPath();
+    QString tmpdir = QString::fromStdString (sys::env::get_temp_directory ());
     m_collection
       = QString::fromStdString (sys::tempnam (tmpdir.toStdString (),
                                               "oct-qhelp-"));
@@ -417,13 +417,13 @@
     // Zoom
     m_tool_bar->addSeparator ();
     m_action_zoom_in
-      = add_action (rmgr.icon ("zoom-in"), tr ("Zoom in"),
+      = add_action (rmgr.icon ("view-zoom-in"), tr ("Zoom in"),
                     SLOT (zoom_in (void)), m_doc_browser, m_tool_bar);
     m_action_zoom_out
-      = add_action (rmgr.icon ("zoom-out"), tr ("Zoom out"),
+      = add_action (rmgr.icon ("view-zoom-out"), tr ("Zoom out"),
                     SLOT (zoom_out (void)), m_doc_browser, m_tool_bar);
     m_action_zoom_original
-      = add_action (rmgr.icon ("zoom-original"), tr ("Zoom original"),
+      = add_action (rmgr.icon ("view-zoom-original"), tr ("Zoom original"),
                     SLOT (zoom_original (void)), m_doc_browser, m_tool_bar);
 
     // Bookmarks (connect slots later)
--- a/libgui/src/files-dock-widget.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libgui/src/files-dock-widget.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -41,6 +41,8 @@
 #include <QMessageBox>
 #include <QProcess>
 #include <QSizePolicy>
+#include <QStyledItemDelegate>
+#include <QTimer>
 #include <QToolButton>
 #include <QUrl>
 
@@ -70,10 +72,116 @@
     }
   };
 
+  // to have file renamed in the file tree, it has to be renamed in
+  // QFileSystemModel::setData.
+  // For the editor to behave correctly, some signals must be sent before
+  // and after the rename
+  class file_system_model : public QFileSystemModel
+  {
+  public:
+    file_system_model (files_dock_widget *p) : QFileSystemModel (p) {}
+
+    ~file_system_model () = default;
+
+    bool setData (const QModelIndex &idx, const QVariant &value,
+                  int role) override
+    {
+      if (!idx.isValid () || idx.column () != 0 || role != Qt::EditRole
+          || (flags (idx) & Qt::ItemIsEditable) == 0)
+        {
+          return false;
+        }
+
+      QString new_name = value.toString ();
+      QString old_name = idx.data ().toString ();
+      if (new_name == old_name)
+        return true;
+      if (new_name.isEmpty ()
+          || QDir::toNativeSeparators (new_name).contains (QDir::separator ()))
+        {
+          display_rename_failed_message (old_name, new_name);
+          return false;
+        }
+
+      auto parent_dir = QDir(filePath (parent (idx)));
+
+      files_dock_widget *fdw = static_cast<files_dock_widget*>(parent());
+
+
+      fdw->file_remove_signal(parent_dir.filePath(old_name), parent_dir.filePath(new_name));
+
+      if (!parent_dir.rename (old_name, new_name))
+        {
+          display_rename_failed_message (old_name, new_name);
+          fdw->file_renamed_signal(false);
+          return false;
+        }
+
+      fdw->file_renamed_signal(true);
+
+      emit fileRenamed(parent_dir.absolutePath(), old_name, new_name);
+      revert();
+
+      return true;
+    }
+
+  private:
+    void display_rename_failed_message (const QString &old_name,
+                                        const QString &new_name)
+    {
+      const QString message =
+
+          files_dock_widget::tr ("Could not rename file \"%1\" to \"%2\".")
+              .arg (old_name)
+              .arg (new_name);
+      QMessageBox::information (static_cast<QWidget *> (parent ()),
+                                QFileSystemModel::tr ("Invalid filename"),
+                                message, QMessageBox::Ok);
+    }
+  };
+
+  // Delegate to improve ergonomy of file renaming by pre-selecting the text
+  // before the extension.
+  class RenameItemDelegate : public QStyledItemDelegate
+  {
+  public:
+    RenameItemDelegate (QObject *parent = nullptr)
+        : QStyledItemDelegate{ parent }
+    {
+    }
+
+    void setEditorData (QWidget *editor,
+                        const QModelIndex &index) const override
+    {
+      QLineEdit *line_edit = qobject_cast<QLineEdit *> (editor);
+
+      if (!line_edit)
+        {
+          QStyledItemDelegate::setEditorData (editor, index);
+          return;
+        }
+
+      QString filename = index.data (Qt::EditRole).toString ();
+
+      int select_len = filename.indexOf (QChar ('.'));
+      if (select_len == -1)
+        select_len = filename.size ();
+
+      line_edit->setText (filename);
+
+      // Qt calls QLineEdit::selectAll after this function is called, so to
+      // actually restrict the selection, we have to post the modification at
+      // the end of the event loop.
+      // QTimer allows this easily with 0 as timeout.
+      QTimer::singleShot (0, [=] () {
+        line_edit->setSelection (0, select_len);
+      });
+    }
+  };
+
   files_dock_widget::files_dock_widget (QWidget *p, base_qobject& oct_qobj)
     : octave_dock_widget ("FilesDockWidget", p, oct_qobj)
   {
-    setWindowIcon (QIcon (":/actions/icons/logo.png"));
     set_title (tr ("File Browser"));
     setToolTip (tr ("Browse your files"));
 
@@ -121,7 +229,7 @@
     resource_manager& rmgr = m_octave_qobj.get_resource_manager ();
 
     QAction *directory_up_action
-      = new QAction (rmgr.icon ("go-up"), "", m_navigation_tool_bar);
+      = new QAction (rmgr.icon ("folder-up", false, "go-up"), "", m_navigation_tool_bar);
     directory_up_action->setToolTip (tr ("One directory up"));
 
     m_sync_browser_directory_action
@@ -146,8 +254,9 @@
     popdown_menu->addAction (m_sync_octave_directory_action);
     popdown_button->setMenu (popdown_menu);
     popdown_button->setPopupMode (QToolButton::InstantPopup);
-    popdown_button->setDefaultAction (new QAction (rmgr.icon ("applications-system"),
-                                                   "", m_navigation_tool_bar));
+    popdown_button->setDefaultAction (
+        new QAction (rmgr.icon ("folder-settings", false, "applications-system"),
+        "", m_navigation_tool_bar));
 
     popdown_menu->addSeparator ();
     popdown_menu->addAction (rmgr.icon ("folder"),
@@ -202,7 +311,7 @@
         startup_dir = QDir ();
       }
 
-    m_file_system_model = new QFileSystemModel (this);
+    m_file_system_model = new file_system_model (this);
     m_file_system_model->setResolveSymlinks (false);
     m_file_system_model->setFilter (
       QDir::System | QDir::NoDotAndDotDot | QDir::AllEntries);
@@ -219,6 +328,24 @@
     m_file_tree_view->setAnimated (true);
     m_file_tree_view->setToolTip (tr ("Double-click to open file/folder, right click for alternatives"));
 
+    // allow renaming directly in the tree view with
+    // m_file_tree_view->edit(index)
+    m_file_system_model->setReadOnly (false);
+    // delegate to improve rename ergonomy by pre-selecting text up to the
+    // extension
+    auto *rename_delegate = new RenameItemDelegate (this);
+    m_file_tree_view->setItemDelegateForColumn (0, rename_delegate);
+    // prevent the tree view to override Octave's double-click behavior
+    m_file_tree_view->setEditTriggers (QAbstractItemView::NoEditTriggers);
+    // create the rename action (that will be added to context menu)
+    // and associate to F2 key shortcut
+    m_rename_action = new QAction (tr ("Rename..."), this);
+    m_rename_action->setShortcut (Qt::Key_F2);
+    m_rename_action->setShortcutContext(Qt::WidgetWithChildrenShortcut);
+    connect (m_rename_action, &QAction::triggered, this,
+             &files_dock_widget::contextmenu_rename);
+    addAction(m_rename_action);
+
     // get sort column and order as well as column state (order and width)
 
     m_file_tree_view->sortByColumn
@@ -582,8 +709,7 @@
           }
 
         menu.addSeparator ();
-        menu.addAction (tr ("Rename..."),
-                        this, &files_dock_widget::contextmenu_rename);
+        menu.addAction (m_rename_action);
         menu.addAction (rmgr.icon ("edit-delete"), tr ("Delete..."),
                         this, &files_dock_widget::contextmenu_delete);
 
@@ -694,37 +820,8 @@
     if (rows.size () > 0)
       {
         QModelIndex index = rows[0];
-
-        QFileInfo info = m_file_system_model->fileInfo (index);
-        QDir path = info.absoluteDir ();
-        QString old_name = info.fileName ();
-        bool ok;
-
-        QString new_name
-          = QInputDialog::getText (this, tr ("Rename file/directory"),
-                                   tr ("Rename file/directory:\n")
-                                   + old_name + tr ("\n to: "),
-                                   QLineEdit::Normal, old_name, &ok);
-        if (ok && new_name.length () > 0)
-          {
-            new_name = path.absolutePath () + '/' + new_name;
-            old_name = path.absolutePath () + '/' + old_name;
-            // editor: close old
-            emit file_remove_signal (old_name, new_name);
-            // Do the renaming
-            QFile f (old_name);  // Must use QFile, not QDir (bug #56298)
-            bool st = f.rename (new_name);
-            if (! st)
-              QMessageBox::warning (this, tr ("Rename error"),
-                                    tr ("Could not rename file \"%1\" to \"%2\".").
-                                    arg (old_name).arg (new_name));
-            // editor: load new/old file depending on success
-            emit file_renamed_signal (st);
-            // Clear cache of file browser
-            m_file_system_model->revert ();
-          }
+        m_file_tree_view->edit(index);
       }
-
   }
 
   void files_dock_widget::contextmenu_delete (bool)
@@ -791,8 +888,8 @@
                                           tr ("Could not delete file \"%1\".").
                                           arg (info.filePath ()));
                     // Reload the old file
-                    emit file_renamed_signal (false);
                   }
+                emit file_renamed_signal (st);
               }
 
             m_file_system_model->revert ();
--- a/libgui/src/files-dock-widget.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libgui/src/files-dock-widget.h	Mon Aug 29 13:58:00 2022 +0200
@@ -207,6 +207,7 @@
     QToolBar *m_navigation_tool_bar;
     QAction *m_sync_octave_directory_action;
     QAction *m_sync_browser_directory_action;
+    QAction *m_rename_action;
 
     //! The file system model.
 
--- a/libgui/src/gui-preferences-dw.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libgui/src/gui-preferences-dw.h	Mon Aug 29 13:58:00 2022 +0200
@@ -51,14 +51,13 @@
 
 const gui_pref dw_icon_set ("DockWidgets/widget_icon_set", QVariant ("NONE"));
 
-const struct { QString name; QString path; } dw_icon_set_names[]
+const QHash <QString, QString> dw_icon_set_names
   = {
       // array of possible icon sets (name, path (complete for NONE))
       // the first entry here is the default!
-      {"NONE",    ":/actions/icons/logo.png"},
-      {"GRAPHIC", ":/actions/icons/graphic_logo_"},
-      {"LETTER",  ":/actions/icons/letter_logo_"},
-      {"", ""} // end marker has empty name
+      {"NONE",    ":/icons/octave/128x128/logo.png"},
+      {"GRAPHIC", ":/icons/octave/128x128/graphic_logo_"},
+      {"LETTER",  ":/icons/octave/128x128/letter_logo_"}
     };
 
 // The following keys have to be used with .arg (objectName ())
--- a/libgui/src/gui-preferences-ed.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libgui/src/gui-preferences-ed.h	Mon Aug 29 13:58:00 2022 +0200
@@ -199,6 +199,9 @@
 const gui_pref
 ed_session_lines ("editor/saved_session_lines", QVariant (QStringList ()));
 
+const gui_pref
+ed_session_bookmarks ("editor/saved_session_bookmarks", QVariant (QStringList ()));
+
 // Tabs
 const QStringList
 ed_tab_position_names (QStringList ()
--- a/libgui/src/gui-preferences-global.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libgui/src/gui-preferences-global.h	Mon Aug 29 13:58:00 2022 +0200
@@ -84,11 +84,48 @@
 const gui_pref
 global_icon_theme ("use_system_icon_theme", QVariant (true));
 
-// Other
+enum
+{
+  ICON_THEME_SYSTEM = 0,
+  ICON_THEME_OCTAVE,
+  ICON_THEME_TANGO,
+  ICON_THEME_CURSORS
+}  ;
+
+const QStringList
+global_icon_paths (QStringList ()
+                        << ""
+                        << ":/icons/octave/128x128/"
+                        << ":/icons/tango/128x128/"
+                        << ":/icons/cursors/"
+                       );
+
+const gui_pref
+global_icon_theme_index ("icon_theme", QVariant (ICON_THEME_SYSTEM));
+const QStringList
+global_all_icon_themes (QStringList ()
+                        << ""
+                        << "octave"
+                        << "tango"
+                        << "cursors");
+const QStringList
+global_all_icon_theme_names (QStringList ()
+                        << "System"
+                        << "Octave"
+                        << "Tango");
 
 const gui_pref
 global_status_bar ("show_status_bar", QVariant (true));
 
+
+enum
+{
+  EXTRA_STYLE_FUSION_DARK = 0
+}  ;
+const QStringList
+global_extra_styles (QStringList ()
+                        << "Fusion-Dark");
+
 #if defined (Q_OS_MAC)
 // prevent native file dialogs on MAC by setting the default "false" and
 // setting the flag for ignoring the pref to "true" (3rd argument)
--- a/libgui/src/history-dock-widget.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libgui/src/history-dock-widget.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -310,7 +310,6 @@
 
     m_filter_checkbox = new QCheckBox ();
 
-    setWindowIcon (QIcon (":/actions/icons/logo.png"));
     set_title (tr ("Command History"));
     setWidget (new QWidget ());
 
Binary file libgui/src/icons/applications-system.png has changed
--- a/libgui/src/icons/applications-system.svg	Sun Aug 28 22:44:49 2022 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
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--- a/libgui/src/icons/bp-rm-all.svg	Sun Aug 28 22:44:49 2022 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
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Binary file libgui/src/icons/db-stop.png has changed
--- a/libgui/src/icons/db-stop.svg	Sun Aug 28 22:44:49 2022 +0200
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Binary file libgui/src/icons/edit-delete.png has changed
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Binary file libgui/src/icons/go-last.png has changed
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--- a/libgui/src/icons/icons_license	Sun Aug 28 22:44:49 2022 +0200
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-===========================================
-Icons based on the Tango-Desktop-Project
-===========================================
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-===========================================
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-===========================================
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-applications-system.svg
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libgui/src/icons/license.md	Mon Aug 29 13:58:00 2022 +0200
@@ -0,0 +1,137 @@
+# Icons for Octave
+
+## Icons based on the Tango-Desktop-Project
+
+The icons in the directory **tango** are taken from the Tango-Desktop-Projekt
+
+- [Tango-Desktop-Project](http://tango.freedesktop.org/Tango_Desktop_Project)
+- [Archive with base icon set](http://tango.freedesktop.org/releases/tango-icon-theme-0.8.90.tar.gz)
+
+The Tango base icon theme is released to the Public Domain.
+
+The following icons excusively used by octave are created by the
+Octave developers using elements of the tango icon theme:
+
+- bp-next
+- bp-prev
+- bp-rm_all
+- bp-toggle
+- db-cont
+- db-step-in
+- db-step-out
+- db-step
+- db-stop
+- system-run
+
+
+## Icons by Octave developers
+
+The icons in the directory **octave** are created by the Octave developers.
+
+### Icons by Luís Eduardo Ribeiro Guerra
+
+The icons are maintained in this
+[repository on github](https://github.com/luisrguerra/cc0-fluent-icons)
+under the CC0 1.0 Universal license.
+
+- applications-system
+- bookmark-new
+- bp-next
+- bp-prev
+- bp-rm-all
+- bp-toggle
+- db-cont
+- db-step-in
+- db-step-out
+- db-step
+- db-stop
+- dialog-error
+- dialog-information
+- document-new
+- document-open
+- document-print
+- document-save-as
+- document-save
+- edit-copy
+- edit-cut
+- edit-find-replace
+- edit-find
+- edit-paste
+- edit-redo
+- edit-undo
+- folder-new
+- figure-axes
+- figure-grid
+- figure-pan
+- figure-rotate
+- figure-text
+- figure-zoom-in
+- figure-zoom-original
+- figure-zoom-out
+- folder-settings
+- folder-up
+- folder
+- go-down
+- go-first
+- go-home
+- go-last
+- go-next
+- go-previous
+- go-up
+- system-run
+- user-home
+- view-zoom-in
+- view-zoom-out
+- view-zoom-original
+
+### Icons containing elements from the Tango theme
+
+- graphic_logo_DocumentationDockWidget
+- graphic_logo_Figure
+- graphic_logo_FileEditor
+- graphic_logo_FilesDockWidget
+- graphic_logo_HistoryDockWidget
+- graphic_logo_NewsDockWidget
+- graphic_logo_ReleaseWidget
+- graphic_logo_TerminalDockWidget
+- graphic_logo_WorkspaceView
+- letter_logo_DocumentationDockWidget
+- letter_logo_FileEditor
+- letter_logo_FilesDockWidget
+- letter_logo_HistoryDockWidget
+- letter_logo_NewsDockWidget
+- letter_logo_ReleaseWidget
+- letter_logo_TerminalDockWidget
+- letter_logo_WorkspaceView
+- plot-xy-curve
+
+### Icons created independently
+
+- logo
+- widget-close
+- widget-dock
+- widget-undock
+
+
+## Cursor icons
+
+The directory **cursors** contains cursor icons required by Octave.
+The following cursors are taken from the [standrad DMZ theme](https://github.com/GalliumOS/dmz-cursor-theme/tree/master/DMZ-White):
+
+- bottom_left_corner
+- bottom_right_corner
+- bottom_side
+- cross
+- fleur
+- hand2
+- left_side
+- right_side
+- top_left_corner
+- top_right_corner
+- top_side
+
+## Cursor created by the Octave developers
+
+The following cursors are created by the Octave developers with elements from the DMZ theme:
+
+- circle
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Binary file libgui/src/icons/octave/128x128/widget-dock-light.png has changed
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libgui/src/icons/octave/index.theme	Mon Aug 29 13:58:00 2022 +0200
@@ -0,0 +1,18 @@
+[Icon Theme]
+Name=Octave-icons
+Comment=icon theme for octave
+
+# Directory list
+Directories=scalable,128
+
+[scalable]
+Size=48
+MinSize=16
+MaxSize=512
+Type=Scalable
+
+[128x128]
+Size=128
+MinSize=16
+MaxSize=512
+Type=Scalable
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
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@@ -0,0 +1,1 @@
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libgui/src/icons/octave/scalable/bookmark-new.svg	Mon Aug 29 13:58:00 2022 +0200
@@ -0,0 +1,1 @@
+<svg width="24px" height="24px" id="Camada_1" data-name="Camada 1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 24 24"><defs><style>.cls-1{fill:#b5b5b5;}.cls-2{fill:#fff;}.cls-3{fill:#8f8f8f;}.cls-4{fill:#53c23d;}.cls-5{fill:url(#Gradiente_sem_nome_21);}</style><linearGradient id="Gradiente_sem_nome_21" x1="3.8607" y1="4.1393" x2="13.1393" y2="13.4178" gradientUnits="userSpaceOnUse"><stop offset="0" stop-color="#f55f51"/><stop offset="1" stop-color="#e32e1e"/></linearGradient></defs><rect class="cls-1" x="4" y="2" width="16" height="20" rx="1.1098"/><rect class="cls-2" x="5" y="3" width="14" height="18" rx="0.9848"/><rect class="cls-3" x="7" y="6" width="10" height="1" rx="0.2282"/><rect class="cls-3" x="7" y="8" width="10" height="1" rx="0.2282"/><rect class="cls-3" x="7" y="10" width="10" height="1" rx="0.2282"/><rect class="cls-3" x="7" y="12" width="10" height="1" rx="0.2282"/><rect class="cls-3" x="7" y="14" width="10" height="1" rx="0.2282"/><rect class="cls-3" x="7" y="16" width="10" height="1" rx="0.2282"/><path class="cls-4" d="M22.397,6H20V3.603A.6029.6029,0,0,0,19.397,3H17.603A.6029.6029,0,0,0,17,3.603V6H14.603A.6029.6029,0,0,0,14,6.603V8.397A.603.603,0,0,0,14.603,9H17v2.397a.603.603,0,0,0,.603.603h1.794A.603.603,0,0,0,20,11.397V9h2.397A.603.603,0,0,0,23,8.397V6.603A.6029.6029,0,0,0,22.397,6Z"/><path class="cls-5" d="M6,2V15.5031c0,.1488.2413.2073.3445.0834L8.5,13l2.1555,2.5865c.1032.1239.3445.0654.3445-.0834V2Z"/></svg>
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@@ -0,0 +1,1 @@
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libgui/src/icons/tango/index.theme	Mon Aug 29 13:58:00 2022 +0200
@@ -0,0 +1,18 @@
+[Icon Theme]
+Name=Tango-icons
+Comment=icon theme tango
+
+# Directory list
+Directories=scalable,128
+
+[scalable]
+Size=48
+MinSize=16
+MaxSize=512
+Type=Scalable
+
+[128x128]
+Size=128
+MinSize=16
+MaxSize=512
+Type=Scalable
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libgui/src/icons/tango/scalable/applications-system.svg	Mon Aug 29 13:58:00 2022 +0200
@@ -0,0 +1,247 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
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--- a/libgui/src/m-editor/file-editor-interface.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libgui/src/m-editor/file-editor-interface.h	Mon Aug 29 13:58:00 2022 +0200
@@ -98,7 +98,8 @@
                                     bool breakpoint_marker = false,
                                     bool insert = true,
                                     const QString& cond = "",
-                                    int index = -1) = 0;
+                                    int index = -1,
+                                    const QString& bookmarks = QString ()) = 0;
   };
 }
 
--- a/libgui/src/m-editor/file-editor-tab.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libgui/src/m-editor/file-editor-tab.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -45,6 +45,7 @@
 #include <QPrintDialog>
 #include <QPushButton>
 #include <QScrollBar>
+#include <QSaveFile>
 #include <QStyle>
 #include <QTextBlock>
 #include <QTextCodec>
@@ -508,6 +509,9 @@
         update_lexer ();
       }
 
+    // set the window title to actual filename (not modified)
+    update_window_title (m_edit_area->isModified ());
+
     // update the file editor with current editing directory
     emit editor_state_changed (m_copy_available, m_is_octave_file,
                                m_edit_area->isModified ());
@@ -531,6 +535,14 @@
     return true;
   }
 
+  void file_editor_tab::enable_file_watcher (bool do_enable)
+  {
+    if (do_enable)
+      m_file_system_watcher.addPath (m_file_name);
+    else
+      m_file_system_watcher.removePath (m_file_name);
+  }
+
   // We cannot create a breakpoint when the file is modified
   // because the line number the editor is providing might
   // not match what Octave core is interpreting in the
@@ -1122,6 +1134,27 @@
     m_edit_area->setCursorPosition (prevline, 0);
   }
 
+
+  QString file_editor_tab::get_all_bookmarks ()
+  {
+    QString bmlist;
+    int line = 0;
+
+    while (line > -1)
+      {
+        line = m_edit_area->markerFindNext (line, (1 << marker::bookmark));
+        if (line > -1)
+          {
+            if (! bmlist.isEmpty ())
+              bmlist += ",";
+            bmlist += QString::number (line);
+            line++;   // search from next line, otherwise same line found again
+          }
+      }
+
+    return bmlist;
+  }
+
   void file_editor_tab::remove_bookmark (const QWidget *ID)
   {
     if (ID != this)
@@ -1844,9 +1877,8 @@
     QApplication::restoreOverrideCursor ();
 
     m_copy_available = false;     // no selection yet available
+    m_edit_area->setModified (false); // loaded file is not modified yet
     set_file_name (file_to_load);
-    update_window_title (false); // window title (no modification)
-    m_edit_area->setModified (false); // loaded file is not modified yet
 
     update_eol_indicator ();
 
@@ -2183,7 +2215,7 @@
                                       bool remove_on_success,
                                       bool restore_breakpoints)
   {
-    QFile file (file_to_save);
+    QSaveFile file (file_to_save);
 
     // stop watching file
     QStringList trackedFiles = m_file_system_watcher.files ();
@@ -2207,7 +2239,7 @@
 
     // open the file for writing (use QIODevice::ReadWrite for avoiding
     // truncating the previous file contents)
-    if (! file.open (QIODevice::ReadWrite))
+    if (! file.open (QIODevice::WriteOnly))
       {
         // Unsuccessful, begin watching file again if it was being
         // watched previously.
@@ -2248,37 +2280,47 @@
 
     out.flush ();
     QApplication::restoreOverrideCursor ();
-    file.resize (file.pos());
-    file.flush ();
-    file.close ();
-
-    // file exists now
-    QFileInfo file_info = QFileInfo (file);
-    QString full_file_to_save = file_info.canonicalFilePath ();
-
-    // save filename after closing file as set_file_name starts watching again
-    set_file_name (full_file_to_save);   // make absolute
-
-    // set the window title to actual filename (not modified)
-    update_window_title (false);
-
-    // file is save -> not modified, update encoding in statusbar
-    m_edit_area->setModified (false);
-    m_enc_indicator->setText (m_encoding);
-
-    emit tab_ready_to_close ();
-
-    if (remove_on_success)
+
+    // Finish writing by committing the changes to disk,
+    // where nothing is done when an error occurred while writing above
+    bool writing_ok = file.commit ();
+
+    if (writing_ok)
       {
-        emit tab_remove_request ();
-        return;  // Don't touch member variables after removal
+        // Writing was successful: file exists now
+        QFileInfo file_info = QFileInfo (file.fileName ());
+        QString full_file_to_save = file_info.canonicalFilePath ();
+
+        // file is save -> not modified, update encoding in statusbar
+        m_edit_area->setModified (false);
+        m_enc_indicator->setText (m_encoding);
+
+        // save filename after closing file as set_file_name starts watching again
+        set_file_name (full_file_to_save);   // make absolute
+
+        emit tab_ready_to_close ();
+
+        if (remove_on_success)
+          {
+            emit tab_remove_request ();
+            return;  // Don't touch member variables after removal
+          }
+
+        // Attempt to restore the breakpoints if that is desired.
+        // This is only allowed if the tab is not closing since changing
+        // breakpoints would reopen the tab in this case.
+        if (restore_breakpoints)
+          check_restore_breakpoints ();
       }
-
-    // Attempt to restore the breakpoints if that is desired.
-    // This is only allowed if the tab is not closing since changing
-    // breakpoints would reopen the tab in this case.
-    if (restore_breakpoints)
-      check_restore_breakpoints ();
+    else
+      {
+        QMessageBox::critical (nullptr,
+                               tr ("Octave Editor"),
+                               tr ("The changes could not be saved to the file\n"
+                                   "%1")
+                                   .arg (file.fileName ())
+                              );
+      }
   }
 
   void file_editor_tab::save_file_as (bool remove_on_success)
--- a/libgui/src/m-editor/file-editor-tab.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libgui/src/m-editor/file-editor-tab.h	Mon Aug 29 13:58:00 2022 +0200
@@ -64,6 +64,8 @@
     bool conditional_close (void);
 
     void update_breakpoints ();
+    void set_file_name (const QString& fileName);
+    void enable_file_watcher (bool do_enable);
 
     QString file_name (void) const { return m_file_name; }
     QString encoding (void) const { return m_encoding; }
@@ -255,7 +257,6 @@
   protected:
 
     void closeEvent (QCloseEvent *event);
-    void set_file_name (const QString& fileName);
 
   private:
 
@@ -275,8 +276,12 @@
     void update_lexer (void);
 
     void show_dialog (QDialog *dlg, bool modal);
+
   public:
+
     int check_file_modified (bool remove = false);
+    QString get_all_bookmarks (void);
+
   private:
     void do_comment_selected_text (bool comment, bool input_str = false);
     void do_indent_selected_text (bool indent);
--- a/libgui/src/m-editor/file-editor.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libgui/src/m-editor/file-editor.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -337,12 +337,16 @@
     QStringList session_lines
       = settings->value (ed_session_lines).toStringList ();
 
+    QStringList session_bookmarks
+      = settings->value (ed_session_bookmarks).toStringList ();
+
     // fill a list of the struct and sort it (depending on index)
     QList<session_data> s_data;
 
     bool do_encoding = (session_encodings.count () == sessionFileNames.count ());
     bool do_index = (session_index.count () == sessionFileNames.count ());
     bool do_lines = (session_lines.count () == sessionFileNames.count ());
+    bool do_bookmarks = (session_bookmarks.count () == sessionFileNames.count ());
 
     for (int n = 0; n < sessionFileNames.count (); ++n)
       {
@@ -351,13 +355,15 @@
           continue;
 
         session_data item = { 0, -1, sessionFileNames.at (n),
-                              QString (), QString ()};
+                              QString (), QString (), QString ()};
         if (do_lines)
           item.line = session_lines.at (n).toInt ();
         if (do_index)
           item.index = session_index.at (n).toInt ();
         if (do_encoding)
           item.encoding = session_encodings.at (n);
+        if (do_bookmarks)
+          item.bookmarks = session_bookmarks.at (n);
 
         s_data << item;
       }
@@ -367,7 +373,8 @@
     // finally open the files with the desired encoding in the desired order
     for (int n = 0; n < s_data.count (); ++n)
       request_open_file (s_data.at (n).file_name, s_data.at (n).encoding,
-                         s_data.at (n).line);
+                         s_data.at (n).line, false, false, true, "", -1,
+                         s_data.at (n).bookmarks);
   }
 
   void file_editor::activate (void)
@@ -440,6 +447,7 @@
     QStringList fet_encodings;
     QStringList fet_index;
     QStringList fet_lines;
+    QStringList fet_bookmarks;
 
     std::list<file_editor_tab *> editor_tab_lst = m_tab_widget->tab_list ();
 
@@ -460,6 +468,8 @@
             int l, c;
             editor_tab->qsci_edit_area ()->getCursorPosition (&l, &c);
             fet_lines.append (index.setNum (l + 1));
+
+            fet_bookmarks.append (editor_tab->get_all_bookmarks ());
           }
       }
 
@@ -467,6 +477,7 @@
     settings->setValue (ed_session_enc.key, fet_encodings);
     settings->setValue (ed_session_ind.key, fet_index);
     settings->setValue (ed_session_lines.key, fet_lines);
+    settings->setValue (ed_session_bookmarks.key, fet_bookmarks);
     settings->sync ();
   }
 
@@ -676,6 +687,11 @@
        {
          // INTERPRETER THREAD
 
+         // Act as though this action was entered at the command propmt
+         // so that the interpreter will check for updated file time
+         // stamps.
+         Vlast_prompt_time.stamp ();
+
          tree_evaluator& tw = interp.get_evaluator ();
 
          if (tw.in_debug_repl ())
@@ -1167,7 +1183,7 @@
   {
     // Clear old list of file data and declare a structure for file data
     m_tmp_closed_files.clear ();
-    session_data f_data;
+    removed_file_data f_data;
 
     // Preprocessing old name(s)
     QString old_name_clean = old_name.trimmed ();
@@ -1201,22 +1217,12 @@
 
             if (editor_tab)
               {
-                // Get index and line.
-
-                f_data.encoding = editor_tab->encoding ();
-                f_data.index = m_tab_widget->indexOf (editor_tab);
-                int l, c;
-                editor_tab->qsci_edit_area ()->getCursorPosition (&l, &c);
-                f_data.line = l + 1;
-
-                // Close it silently
-                m_no_focus = true;  // Remember for not focussing editor
-                editor_tab->file_has_changed (QString (), true);  // Close the tab
-                m_no_focus = false;  // Back to normal
-
-                // For reloading old file if error while removing
-                f_data.file_name = old_names.at (i);
-                // For reloading new file (if new_file is not empty)
+
+                editor_tab->enable_file_watcher (false);
+
+                // For re-enabling tracking if error while removing/renaming
+                f_data.editor_tab = editor_tab;
+                // For renaming into new file (if new_file is not empty)
                 if (new_is_dir)
                   {
                     std::string ndir = new_name.toStdString ();
@@ -1239,27 +1245,24 @@
   {
     m_no_focus = true;  // Remember for not focussing editor
 
-    // Loop over all files that have to be reloaded.  Start at the end of the
+    // Loop over all files that have to be handled.  Start at the end of the
     // list, otherwise the stored indexes are not correct.
     for (int i = m_tmp_closed_files.count () - 1; i >= 0; i--)
       {
-        // Load old or new file
         if (load_new)
           {
-            if (! m_tmp_closed_files.at (i).new_file_name.isEmpty ())
-              request_open_file (m_tmp_closed_files.at (i).new_file_name,
-                                 m_tmp_closed_files.at (i).encoding,
-                                 m_tmp_closed_files.at (i).line,
-                                 false, false, true, "",
-                                 m_tmp_closed_files.at (i).index);
+            // Close file (remove) or rename into new file (rename)
+            if (m_tmp_closed_files.at (i).new_file_name.isEmpty ())
+              m_tmp_closed_files.at (i).editor_tab->file_has_changed (QString (), true);
+            else
+              m_tmp_closed_files.at (i).editor_tab->set_file_name (
+                                    m_tmp_closed_files.at (i).new_file_name);
           }
         else
           {
-            request_open_file (m_tmp_closed_files.at (i).file_name,
-                               m_tmp_closed_files.at (i).encoding,
-                               m_tmp_closed_files.at (i).line,
-                               false, false, true, "",
-                               m_tmp_closed_files.at (i).index);
+            // Something went wrong while renaming or removing:
+            // Leave everything as it is but reactivate tracking
+            m_tmp_closed_files.at (i).editor_tab->enable_file_watcher (true);
           }
 
       }
@@ -1329,10 +1332,13 @@
     // in several Qt versions (https://bugreports.qt.io/browse/QTBUG-61092)
     if (! rotated)
       {
+        QString icon = global_icon_paths.at (ICON_THEME_OCTAVE) + "widget-close.png";
+
         QString close_button_css_mac (
             "QTabBar::close-button"
-            "  { width: 6px; image: url(:/actions/icons/widget-close.png);"
-            "    subcontrol-position: button; }\n"
+            " { image: url(" + icon + ");"
+            " padding: 4px;"
+            "   subcontrol-position: bottom; }\n"
             "QTabBar::close-button:hover"
             "  { background-color: #cccccc; }");
 
@@ -1540,7 +1546,8 @@
                                        const QString& encoding,
                                        int line, bool debug_pointer,
                                        bool breakpoint_marker, bool insert,
-                                       const QString& cond, int index)
+                                       const QString& cond, int index,
+                                       const QString& bookmarks)
   {
     resource_manager& rmgr = m_octave_qobj.get_resource_manager ();
     gui_settings *settings = rmgr.get_settings ();
@@ -1716,6 +1723,17 @@
                   }
               }
 
+            if (! bookmarks.isEmpty ())
+              {
+                // Restore bookmarks
+                for (const auto& bms : bookmarks.split (','))
+                  {
+                    int bm = bms.toInt ();
+                    if (fileEditorTab)
+                      fileEditorTab->qsci_edit_area ()->markerAdd (bm, marker::bookmark);
+                  }
+              }
+
             if (! ((breakpoint_marker || debug_pointer) && is_editor_console_tabbed ()))
               {
                 // update breakpoint pointers, really show editor
@@ -2215,15 +2233,16 @@
     view_menu->addSeparator ();
 
     m_zoom_in_action
-      = add_action (view_menu, rmgr.icon ("zoom-in"), tr ("Zoom &In"),
+      = add_action (view_menu, rmgr.icon ("view-zoom-in"), tr ("Zoom &In"),
                     SLOT (zoom_in (bool)));
 
     m_zoom_out_action
-      = add_action (view_menu, rmgr.icon ("zoom-out"), tr ("Zoom &Out"),
+      = add_action (view_menu, rmgr.icon ("view-zoom-out"), tr ("Zoom &Out"),
                     SLOT (zoom_out (bool)));
 
     m_zoom_normal_action
-      = add_action (view_menu, tr ("&Normal Size"), SLOT (zoom_normal (bool)));
+      = add_action (view_menu, rmgr.icon ("view-zoom-original"), tr ("&Normal Size"),
+                    SLOT (zoom_normal (bool)));
 
     view_menu->addSeparator ();
 
@@ -2379,7 +2398,6 @@
              this, &file_editor::active_tab_changed);
 
     resize (500, 400);
-    setWindowIcon (QIcon (":/actions/icons/logo.png"));
     set_title (tr ("Editor"));
 
     check_actions ();
@@ -2704,7 +2722,7 @@
                                        const QString& new_name)
   {
     QDir old_dir (old_name);
-    session_data f_data;
+    removed_file_data f_data;
 
     std::list<file_editor_tab *> editor_tab_lst = m_tab_widget->tab_list ();
 
@@ -2731,52 +2749,39 @@
             && (rel_path_to_file.left (3) != QString ("../")))
           {
             // The currently considered file is included in the
-            // removed/renamed diectory: Delete it.
-            m_no_focus = true;  // Remember for not focussing editor
-
+            // removed/renamed diectory: remeber it
             if (editor_tab)
               {
-                // Get index and line
-                int l, c;
-                editor_tab->qsci_edit_area ()->getCursorPosition (&l, &c);
-                f_data.line = l + 1;
-                f_data.index = m_tab_widget->indexOf (editor_tab);
-                // Close
-                editor_tab->file_has_changed (QString (), true);
-              }
-            m_no_focus = false;  // Back to normal
-
-            // Store file for possible later reload
-            f_data.file_name = file_name;
-
-            // Add the new file path and the encoding for later reloading
-            // if new_name is given
-            if (! new_name.isEmpty ())
-              {
-                QDir new_dir (new_name);
-                QString append_to_new_dir;
-                if (new_dir.exists ())
+                editor_tab->enable_file_watcher (false);
+                f_data.editor_tab = editor_tab;
+
+                // Add the new file path and the encoding for later reloading
+                // if new_name is given
+                if (! new_name.isEmpty ())
                   {
-                    // The new directory already exists (movefile was used).
-                    // This means, we have to add the name (not the path)
-                    // of the old dir and the relative path to the file
-                    // to new dir.
-                    append_to_new_dir
-                      = old_dir.dirName () + "/" + rel_path_to_file;
+                    QDir new_dir (new_name);
+                    QString append_to_new_dir;
+                    if (new_dir.exists ())
+                      {
+                        // The new directory already exists (movefile was used).
+                        // This means, we have to add the name (not the path)
+                        // of the old dir and the relative path to the file
+                        // to new dir.
+                        append_to_new_dir
+                          = old_dir.dirName () + "/" + rel_path_to_file;
+                      }
+                    else
+                      append_to_new_dir = rel_path_to_file;
+
+                    f_data.new_file_name
+                      = new_dir.absoluteFilePath (append_to_new_dir);
                   }
                 else
-                  append_to_new_dir = rel_path_to_file;
-
-                f_data.new_file_name
-                  = new_dir.absoluteFilePath (append_to_new_dir);
+                  f_data.new_file_name = ""; // no new name, just removing this file
+
+                // Store data in list for later reloading
+                m_tmp_closed_files << f_data;
               }
-            else
-              f_data.new_file_name = ""; // no new name, just removing this file
-
-            f_data.encoding = editor_tab->encoding (); // store the encoding
-
-            // Store data in list for later reloading
-            m_tmp_closed_files << f_data;
           }
       }
   }
--- a/libgui/src/m-editor/file-editor.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libgui/src/m-editor/file-editor.h	Mon Aug 29 13:58:00 2022 +0200
@@ -82,6 +82,7 @@
       QString file_name;
       QString new_file_name;
       QString encoding;
+      QString bookmarks;
 
       bool operator < (const session_data& other) const
       {
@@ -89,6 +90,12 @@
       }
     };
 
+    struct removed_file_data
+    {
+      file_editor_tab *editor_tab;
+      QString new_file_name;
+    };
+
     file_editor (QWidget *p, base_qobject& oct_qobj);
 
     ~file_editor (void) = default;
@@ -307,7 +314,8 @@
                             const QString& encoding = QString (),
                             int line = -1, bool debug_pointer = false,
                             bool breakpoint_marker = false, bool insert = true,
-                            const QString& cond = "", int index = -1);
+                            const QString& cond = "", int index = -1,
+                            const QString& bookmarks = QString ());
     void request_preferences (bool);
     void request_styles_preferences (bool);
 
@@ -487,7 +495,7 @@
     QPointer<find_dialog> m_find_dialog;
 
     // List of data on temporarily closed files for later reloading.
-    QList<session_data> m_tmp_closed_files;
+    QList<removed_file_data> m_tmp_closed_files;
   };
 }
 
--- a/libgui/src/m-editor/find-dialog.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libgui/src/m-editor/find-dialog.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -94,7 +94,6 @@
       m_in_sel (false), m_sel_beg (-1), m_sel_end (-1)
   {
     setWindowTitle (tr ("Editor: Find and Replace"));
-    setWindowIcon (QIcon (":/actions/icons/find.png"));
 
     m_search_label = new QLabel (tr ("Find &what:"));
     m_search_line_edit = new QComboBox (this);
--- a/libgui/src/m-editor/octave-qscintilla.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libgui/src/m-editor/octave-qscintilla.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -948,8 +948,11 @@
 
              // Remove line and column from first line of error message only
              // if it is related to the tmp itself, i.e. only if the
-             // the error stack size is 0 or 1
-             if (stack.size () < 2)
+             // the error stack size is 0, 1, or, if in debug mode, 2
+             size_t max_stack_size = 1;
+             if (dbg)
+               max_stack_size = 2;
+             if (stack.size () <= max_stack_size)
                {
                  QRegExp rx ("source: error sourcing file [^\n]*$");
                  if (new_msg.contains (rx))
@@ -984,9 +987,12 @@
                    }
                }
 
-             // Drop first stack level, i.e. temporary function file
+             // Drop first stack level, which is the temporary function file,
+             // or, if in debug mode, drop first two stack levels
              if (stack.size () > 0)
                stack.pop_back ();
+             if (dbg && (stack.size () > 0))
+               stack.pop_back ();
 
              // Clean up before throwing the modified error.
              emit ctx_menu_run_finished_signal (show_dbg_file, err_line,
--- a/libgui/src/main-window.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libgui/src/main-window.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -135,6 +135,8 @@
 
     setObjectName (gui_obj_name_main_window);
 
+    rmgr.config_icon_theme ();
+
     rmgr.update_network_settings ();
 
     // We provide specific terminal capabilities, so ensure that
@@ -170,6 +172,7 @@
     QApplication *qapp = m_octave_qobj.qapplication ();
 
     m_default_style = qapp->style ()->objectName ();
+    m_default_palette = qapp->palette ();
 
     gui_settings *settings = rmgr.get_settings ();
 
@@ -279,6 +282,11 @@
         connect (cmd_widget, &QTerminal::clear_command_window_request,
                  this, &main_window::handle_clear_command_window_request);
       }
+    else
+      {
+        connect (this, &main_window::execute_command_signal,
+                 m_command_window, &terminal_dock_widget::execute_command_signal);
+      }
   }
 
   void main_window::adopt_documentation_widget (void)
@@ -828,7 +836,6 @@
 
     // Wait for worker to suspend
     qt_link->lock ();
-
     // Close the file if opened
 #if defined (HAVE_QSCINTILLA)
     m_editor_window->handle_file_remove (o, n);
@@ -855,7 +862,7 @@
 
   void main_window::open_octave_packages_page (void)
   {
-    QDesktopServices::openUrl (QUrl ("https://octave.org/packages.html"));
+    QDesktopServices::openUrl (QUrl ("https://packages.octave.org/index.html"));
   }
 
   void main_window::open_contribute_page (void)
@@ -910,32 +917,28 @@
     if (preferred_style == global_style.def.toString ())
       preferred_style = m_default_style;
 
-    QStyle *new_style = QStyleFactory::create (preferred_style);
-    if (new_style)
+    QApplication* qapp = m_octave_qobj.qapplication();
+
+    if (preferred_style == global_extra_styles.at (EXTRA_STYLE_FUSION_DARK))
       {
-        QApplication *qapp = m_octave_qobj.qapplication ();
-
-        qapp->setStyle (new_style);
+        QStyle *new_style = QStyleFactory::create (QStringLiteral("Fusion"));
+        if (new_style)
+          qapp->setStyle (new_style);
+        qapp->setPalette (getFusionDarkPalette());
+        qapp->setStyleSheet ("QToolTip { color: #ffffff; background-color: #2a82da; border: 1px solid white; }");
+      }
+    else
+      {
+        QStyle *new_style = QStyleFactory::create (preferred_style);
+        if (new_style)
+          {
+            qapp->setPalette (m_default_palette);
+            qapp->setStyle (new_style);
+          }
       }
 
     // the widget's icons (when floating)
-    QString icon_set
-      = settings->value (dw_icon_set).toString ();
-
-    int count = 0;
-    int icon_set_found = 0; // default
-
-    while (! dw_icon_set_names[count].name.isEmpty ())
-      {
-        // while not end of data
-        if (dw_icon_set_names[count].name == icon_set)
-          {
-            // data of desired icon set found
-            icon_set_found = count;
-            break;
-          }
-        count++;
-      }
+    QString icon_set = settings->value (dw_icon_set).toString ();
 
     QString icon;
     for (auto *widget : dock_widget_list ())
@@ -944,8 +947,8 @@
         if (! name.isEmpty ())
           {
             // if child has a name
-            icon = dw_icon_set_names[icon_set_found].path; // prefix | octave-logo
-            if (dw_icon_set_names[icon_set_found].name != "NONE")
+            icon = dw_icon_set_names[icon_set];
+            if (icon_set != "NONE")
               icon += name + ".png"; // add widget name and ext.
             widget->setWindowIcon (QIcon (icon));
           }
@@ -1012,6 +1015,33 @@
 
   }
 
+  QPalette main_window::getFusionDarkPalette()
+  {
+    QPalette darkPalette;
+    darkPalette.setColor(QPalette::Window, QColor(53, 53, 53));
+    darkPalette.setColor(QPalette::WindowText, Qt::white);
+    darkPalette.setColor(QPalette::Disabled, QPalette::WindowText, QColor(127, 127, 127));
+    darkPalette.setColor(QPalette::Base, QColor(42, 42, 42));
+    darkPalette.setColor(QPalette::AlternateBase, QColor(66, 66, 66));
+    darkPalette.setColor(QPalette::ToolTipBase, Qt::white);
+    darkPalette.setColor(QPalette::ToolTipText, Qt::white);
+    darkPalette.setColor(QPalette::Text, Qt::white);
+    darkPalette.setColor(QPalette::Disabled, QPalette::Text, QColor(127, 127, 127));
+    darkPalette.setColor(QPalette::Dark, QColor(35, 35, 35));
+    darkPalette.setColor(QPalette::Shadow, QColor(20, 20, 20));
+    darkPalette.setColor(QPalette::Button, QColor(53, 53, 53));
+    darkPalette.setColor(QPalette::ButtonText, Qt::white);
+    darkPalette.setColor(QPalette::Disabled, QPalette::ButtonText, QColor(127, 127, 127));
+    darkPalette.setColor(QPalette::BrightText, Qt::red);
+    darkPalette.setColor(QPalette::Link, QColor(42, 130, 218));
+    darkPalette.setColor(QPalette::Highlight, QColor(42, 130, 218));
+    darkPalette.setColor(QPalette::Disabled, QPalette::Highlight, QColor(80, 80, 80));
+    darkPalette.setColor(QPalette::HighlightedText, Qt::white);
+    darkPalette.setColor(QPalette::Disabled, QPalette::HighlightedText, QColor(127, 127, 127));
+
+    return darkPalette;
+  }
+
   void main_window::prepare_to_exit (void)
   {
     // Find files dialog is constructed dynamically, not at time of main_window
@@ -1116,19 +1146,26 @@
 
   void main_window::execute_command_in_terminal (const QString& command)
   {
-    emit interpreter_event
-      ([=] (void)
-       {
-         // INTERPRETER THREAD
-
-         std::string pending_input = command_editor::get_current_line ();
-
-         command_editor::set_initial_input (pending_input);
-         command_editor::replace_line (command.toStdString ());
-         command_editor::redisplay ();
-         command_editor::interrupt_event_loop ();
-         command_editor::accept_line ();
-       });
+    if (m_octave_qobj.experimental_terminal_widget ())
+      {
+        emit execute_command_signal (command);
+      }
+    else
+      {
+        emit interpreter_event
+          ([=] (void)
+           {
+             // INTERPRETER THREAD
+
+             std::string pending_input = command_editor::get_current_line ();
+
+             command_editor::set_initial_input (pending_input);
+             command_editor::replace_line (command.toStdString ());
+             command_editor::redisplay ();
+             command_editor::interrupt_event_loop ();
+             command_editor::accept_line ();
+           });
+      }
 
     focus_console_after_command ();
   }
@@ -1555,24 +1592,20 @@
         // setting the geometry to the max. available geometry. However, on
         // X11, the available geometry (excluding task bar etc.) is equal to
         // the total geometry leading to a full screen mode without window
-        // decorations. This in turn can be avoided by reducing the max.
-        // size by a few pixels.
-
-        // Get available geometry for current screen.
+        // decorations. This in turn can be avoided by explicitly adding
+        // a title bar in the window flags.
+
+        // Get available geometry for current screen and set this
+        // window's geometry to it.
         QScreen *s = windowHandle ()->screen ();
         QRect av_geom = s->availableGeometry ();
-
-        QList<QScreen *> screen_list = QGuiApplication::screens ();
-        if (screen_list.length () > 1)
-          {
-            // If we have more than one monitor and available and total
-            // geometry are the same, reduce this too large geometry
-            QRect new_geom (av_geom.x () + 1, av_geom.y () + 1,
-                            av_geom.width ()-2, av_geom.height ()-2);
-            setGeometry (new_geom);
-          }
-        else
-          setGeometry (av_geom);  // Set (correct) available geometry
+        setGeometry (av_geom);  // Set (correct) available geometry
+
+        // Force full title bar
+        setWindowFlags(Qt::WindowTitleHint
+                       | Qt::WindowMinMaxButtonsHint
+                       | Qt::WindowSystemMenuHint
+                       | Qt::WindowCloseButtonHint);
       }
 
     if (! restoreState (settings->value (mw_state).toByteArray ()))
@@ -1781,6 +1814,7 @@
           });
       }
 
+    m_command_window->init_command_prompt ();
     focus_command_window ();  // make sure that the command window has focus
   }
 
@@ -2020,7 +2054,7 @@
 
   void main_window::construct (void)
   {
-    setWindowIcon (QIcon (":/actions/icons/logo.png"));
+    setWindowIcon (QIcon (dw_icon_set_names["NONE"]));
 
     interpreter_qobject *interp_qobj = m_octave_qobj.interpreter_qobj ();
 
@@ -2592,7 +2626,7 @@
     m_main_tool_bar->addWidget (m_current_directory_combo_box);
     resource_manager& rmgr = m_octave_qobj.get_resource_manager ();
     QAction *current_dir_up
-      = m_main_tool_bar->addAction (rmgr.icon ("go-up"),
+      = m_main_tool_bar->addAction (rmgr.icon ("folder-up", false, "go-up"),
                                     tr ("One directory up"));
     QAction *current_dir_search
       = m_main_tool_bar->addAction (rmgr.icon ("folder"),
--- a/libgui/src/main-window.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libgui/src/main-window.h	Mon Aug 29 13:58:00 2022 +0200
@@ -129,6 +129,8 @@
     void interpreter_event (const fcn_callback& fcn);
     void interpreter_event (const meth_callback& meth);
 
+    void execute_command_signal (const QString& command);
+
   public slots:
 
     void focus_changed (QWidget *w_old, QWidget *w_new);
@@ -153,10 +155,10 @@
     void open_donate_page (void);
     void process_settings_dialog_request (const QString& desired_tab
                                           = QString ());
-
     void show_about_octave (void);
     void notice_settings (const gui_settings *settings,
                           bool update_by_worker = false);
+    QPalette getFusionDarkPalette();
     void prepare_to_exit (void);
     void go_to_previous_widget (void);
     void reset_windows (void);
@@ -309,6 +311,7 @@
     QString m_default_encoding;
 
     QString m_default_style;
+    QPalette m_default_palette;
 
     //! Toolbar.
 
--- a/libgui/src/module.mk	Sun Aug 28 22:44:49 2022 +0200
+++ b/libgui/src/module.mk	Mon Aug 29 13:58:00 2022 +0200
@@ -1,113 +1,254 @@
 octave_gui_ICONS = \
-  %reldir%/icons/applications-system.png \
-  %reldir%/icons/bookmark-new.png \
-  %reldir%/icons/bottom_left_corner.png \
-  %reldir%/icons/bottom_right_corner.png \
-  %reldir%/icons/bottom_side.png \
-  %reldir%/icons/bp-next.png \
-  %reldir%/icons/bp-prev.png \
-  %reldir%/icons/bp-rm-all.png \
-  %reldir%/icons/bp-toggle.png \
-  %reldir%/icons/circle.png \
-  %reldir%/icons/cross.png \
-  %reldir%/icons/db-cont.png \
-  %reldir%/icons/db-step-in.png \
-  %reldir%/icons/db-step-out.png \
-  %reldir%/icons/db-step.png \
-  %reldir%/icons/db-stop.png \
-  %reldir%/icons/dialog-error.png \
-  %reldir%/icons/dialog-information.png \
-  %reldir%/icons/dialog-warning.png \
-  %reldir%/icons/document-new.png \
-  %reldir%/icons/document-open.png \
-  %reldir%/icons/document-print.png \
-  %reldir%/icons/document-save.png \
-  %reldir%/icons/document-save-as.png \
-  %reldir%/icons/edit-copy.png \
-  %reldir%/icons/edit-cut.png \
-  %reldir%/icons/edit-delete.png \
-  %reldir%/icons/edit-find.png \
-  %reldir%/icons/edit-find-replace.png \
-  %reldir%/icons/edit-paste.png \
-  %reldir%/icons/edit-redo.png \
-  %reldir%/icons/edit-undo.png \
-  %reldir%/icons/figure-axes.png \
-  %reldir%/icons/figure-grid.png \
-  %reldir%/icons/figure-pan.png \
-  %reldir%/icons/figure-rotate.png \
-  %reldir%/icons/figure-text.png \
-  %reldir%/icons/figure-zoom-in.png \
-  %reldir%/icons/figure-zoom-original.png \
-  %reldir%/icons/figure-zoom-out.png \
-  %reldir%/icons/fleur.png \
-  %reldir%/icons/folder.png \
-  %reldir%/icons/folder-new.png \
-  %reldir%/icons/go-down.png \
-  %reldir%/icons/go-first.png \
-  %reldir%/icons/go-home.png \
-  %reldir%/icons/go-last.png \
-  %reldir%/icons/go-next.png \
-  %reldir%/icons/go-previous.png \
-  %reldir%/icons/go-up.png \
-  %reldir%/icons/graphic_logo_DocumentationDockWidget.png \
-  %reldir%/icons/graphic_logo_Figure.png \
-  %reldir%/icons/graphic_logo_FileEditor.png \
-  %reldir%/icons/graphic_logo_FilesDockWidget.png \
-  %reldir%/icons/graphic_logo_HistoryDockWidget.png \
-  %reldir%/icons/graphic_logo_NewsDockWidget.png \
-  %reldir%/icons/graphic_logo_TerminalDockWidget.png \
-  %reldir%/icons/graphic_logo_WorkspaceView.png \
-  %reldir%/icons/graphic_logo_ReleaseWidget.png \
-  %reldir%/icons/graphic_logo_VariableEditor.png \
-  %reldir%/icons/graphic_logo_DocumentationDockWidget.svg \
-  %reldir%/icons/graphic_logo_FileEditor.svg \
-  %reldir%/icons/graphic_logo_FilesDockWidget.svg \
-  %reldir%/icons/graphic_logo_HistoryDockWidget.svg \
-  %reldir%/icons/graphic_logo_NewsDockWidget.svg \
-  %reldir%/icons/graphic_logo_TerminalDockWidget.svg \
-  %reldir%/icons/graphic_logo_WorkspaceView.svg \
-  %reldir%/icons/graphic_logo_ReleaseWidget.svg \
-  %reldir%/icons/graphic_logo_VariableEditor.svg \
-  %reldir%/icons/hand2.png \
-  %reldir%/icons/icons_license \
-  %reldir%/icons/left_side.png \
-  %reldir%/icons/letter_logo_DocumentationDockWidget.png \
-  %reldir%/icons/letter_logo_FileEditor.png \
-  %reldir%/icons/letter_logo_FilesDockWidget.png \
-  %reldir%/icons/letter_logo_HistoryDockWidget.png \
-  %reldir%/icons/letter_logo_NewsDockWidget.png \
-  %reldir%/icons/letter_logo_TerminalDockWidget.png \
-  %reldir%/icons/letter_logo_WorkspaceView.png \
-  %reldir%/icons/letter_logo_ReleaseWidget.png \
-  %reldir%/icons/letter_logo_VariableEditor.png \
-  %reldir%/icons/letter_logo_DocumentationDockWidget.svg \
-  %reldir%/icons/letter_logo_FileEditor.svg \
-  %reldir%/icons/letter_logo_FilesDockWidget.svg \
-  %reldir%/icons/letter_logo_HistoryDockWidget.svg \
-  %reldir%/icons/letter_logo_NewsDockWidget.svg \
-  %reldir%/icons/letter_logo_TerminalDockWidget.svg \
-  %reldir%/icons/letter_logo_WorkspaceView.svg \
-  %reldir%/icons/letter_logo_ReleaseWidget.svg \
-  %reldir%/icons/letter_logo_VariableEditor.svg \
-  %reldir%/icons/logo.png \
-  %reldir%/icons/plot-xy-curve.png \
-  %reldir%/icons/preferences-system.png \
-  %reldir%/icons/right_side.png \
-  %reldir%/icons/system-run.png \
-  %reldir%/icons/top_left_corner.png \
-  %reldir%/icons/top_right_corner.png \
-  %reldir%/icons/top_side.png \
-  %reldir%/icons/user-home.png \
-  %reldir%/icons/view-refresh.png \
-  %reldir%/icons/widget-close.png \
-  %reldir%/icons/widget-dock.png \
-  %reldir%/icons/widget-undock.png \
-  %reldir%/icons/widget-close-light.png \
-  %reldir%/icons/widget-dock-light.png \
-  %reldir%/icons/widget-undock-light.png \
-  %reldir%/icons/zoom-in.png \
-  %reldir%/icons/zoom-original.png \
-  %reldir%/icons/zoom-out.png
+  %reldir%/icons/license.md \
+  %reldir%/icons/cursors/bottom_left_corner.png \
+  %reldir%/icons/cursors/bottom_right_corner.png \
+  %reldir%/icons/cursors/bottom_side.png \
+  %reldir%/icons/cursors/circle.png \
+  %reldir%/icons/cursors/cross.png \
+  %reldir%/icons/cursors/fleur.png \
+  %reldir%/icons/cursors/hand2.png \
+  %reldir%/icons/cursors/left_side.png \
+  %reldir%/icons/cursors/right_side.png \
+  %reldir%/icons/cursors/top_left_corner.png \
+  %reldir%/icons/cursors/top_right_corner.png \
+  %reldir%/icons/cursors/top_side.png \
+  %reldir%/icons/octave/index.theme \
+  %reldir%/icons/octave/128x128/applications-system.png \
+  %reldir%/icons/octave/128x128/bp-next.png \
+  %reldir%/icons/octave/128x128/bp-prev.png \
+  %reldir%/icons/octave/128x128/bp-rm-all.png \
+  %reldir%/icons/octave/128x128/bp-toggle.png \
+  %reldir%/icons/octave/128x128/bookmark-new.png \
+  %reldir%/icons/octave/128x128/db-cont.png \
+  %reldir%/icons/octave/128x128/db-step-in.png \
+  %reldir%/icons/octave/128x128/db-step-out.png \
+  %reldir%/icons/octave/128x128/db-step.png \
+  %reldir%/icons/octave/128x128/db-stop.png \
+  %reldir%/icons/octave/128x128/dialog-information.png \
+  %reldir%/icons/octave/128x128/dialog-error.png \
+  %reldir%/icons/octave/128x128/document-new.png \
+  %reldir%/icons/octave/128x128/document-open.png \
+  %reldir%/icons/octave/128x128/document-print.png \
+  %reldir%/icons/octave/128x128/document-save-as.png \
+  %reldir%/icons/octave/128x128/document-save.png \
+  %reldir%/icons/octave/128x128/edit-copy.png \
+  %reldir%/icons/octave/128x128/edit-cut.png \
+  %reldir%/icons/octave/128x128/edit-find-replace.png \
+  %reldir%/icons/octave/128x128/edit-find.png \
+  %reldir%/icons/octave/128x128/edit-paste.png \
+  %reldir%/icons/octave/128x128/edit-redo.png \
+  %reldir%/icons/octave/128x128/edit-undo.png \
+  %reldir%/icons/octave/128x128/figure-axes.png \
+  %reldir%/icons/octave/128x128/figure-grid.png \
+  %reldir%/icons/octave/128x128/figure-pan.png \
+  %reldir%/icons/octave/128x128/figure-rotate.png \
+  %reldir%/icons/octave/128x128/figure-text.png \
+  %reldir%/icons/octave/128x128/figure-zoom-in.png \
+  %reldir%/icons/octave/128x128/figure-zoom-original.png \
+  %reldir%/icons/octave/128x128/figure-zoom-out.png \
+  %reldir%/icons/octave/128x128/folder-new.png \
+  %reldir%/icons/octave/128x128/folder-settings.png \
+  %reldir%/icons/octave/128x128/folder-up.png \
+  %reldir%/icons/octave/128x128/folder.png \
+  %reldir%/icons/octave/128x128/go-down.png \
+  %reldir%/icons/octave/128x128/go-first.png \
+  %reldir%/icons/octave/128x128/go-home.png \
+  %reldir%/icons/octave/128x128/go-last.png \
+  %reldir%/icons/octave/128x128/go-next.png \
+  %reldir%/icons/octave/128x128/go-previous.png \
+  %reldir%/icons/octave/128x128/go-up.png \
+  %reldir%/icons/octave/128x128/graphic_logo_DocumentationDockWidget.png \
+  %reldir%/icons/octave/128x128/graphic_logo_Figure.png \
+  %reldir%/icons/octave/128x128/graphic_logo_FileEditor.png \
+  %reldir%/icons/octave/128x128/graphic_logo_FilesDockWidget.png \
+  %reldir%/icons/octave/128x128/graphic_logo_HistoryDockWidget.png \
+  %reldir%/icons/octave/128x128/graphic_logo_NewsDockWidget.png \
+  %reldir%/icons/octave/128x128/graphic_logo_ReleaseWidget.png \
+  %reldir%/icons/octave/128x128/graphic_logo_TerminalDockWidget.png \
+  %reldir%/icons/octave/128x128/graphic_logo_VariableEditor.png \
+  %reldir%/icons/octave/128x128/graphic_logo_WorkspaceView.png \
+  %reldir%/icons/octave/128x128/letter_logo_DocumentationDockWidget.png \
+  %reldir%/icons/octave/128x128/letter_logo_FileEditor.png \
+  %reldir%/icons/octave/128x128/letter_logo_FilesDockWidget.png \
+  %reldir%/icons/octave/128x128/letter_logo_HistoryDockWidget.png \
+  %reldir%/icons/octave/128x128/letter_logo_NewsDockWidget.png \
+  %reldir%/icons/octave/128x128/letter_logo_ReleaseWidget.png \
+  %reldir%/icons/octave/128x128/letter_logo_TerminalDockWidget.png \
+  %reldir%/icons/octave/128x128/letter_logo_VariableEditor.png \
+  %reldir%/icons/octave/128x128/letter_logo_WorkspaceView.png \
+  %reldir%/icons/octave/128x128/logo.png \
+  %reldir%/icons/octave/128x128/plot-xy-curve.png \
+  %reldir%/icons/octave/128x128/system-run.png \
+  %reldir%/icons/octave/128x128/user-home.png \
+  %reldir%/icons/octave/128x128/view-zoom-in.png \
+  %reldir%/icons/octave/128x128/view-zoom-original.png \
+  %reldir%/icons/octave/128x128/view-zoom-out.png \
+  %reldir%/icons/octave/128x128/widget-close-light.png \
+  %reldir%/icons/octave/128x128/widget-close.png \
+  %reldir%/icons/octave/128x128/widget-dock-light.png \
+  %reldir%/icons/octave/128x128/widget-dock.png \
+  %reldir%/icons/octave/128x128/widget-undock-light.png \
+  %reldir%/icons/octave/128x128/widget-undock.png \
+  %reldir%/icons/octave/scalable/applications-system.svg \
+  %reldir%/icons/octave/scalable/bookmark-new.svg \
+  %reldir%/icons/octave/scalable/bp-next.svg \
+  %reldir%/icons/octave/scalable/bp-prev.svg \
+  %reldir%/icons/octave/scalable/bp-rm-all.svg \
+  %reldir%/icons/octave/scalable/bp-toggle.svg \
+  %reldir%/icons/octave/scalable/db-cont.svg \
+  %reldir%/icons/octave/scalable/db-step-in.svg \
+  %reldir%/icons/octave/scalable/db-step-out.svg \
+  %reldir%/icons/octave/scalable/db-step.svg \
+  %reldir%/icons/octave/scalable/db-stop.svg \
+  %reldir%/icons/octave/scalable/dialog-information.svg \
+  %reldir%/icons/octave/scalable/dialog-error.svg \
+  %reldir%/icons/octave/scalable/document-new.svg \
+  %reldir%/icons/octave/scalable/document-open.svg \
+  %reldir%/icons/octave/scalable/document-print.svg \
+  %reldir%/icons/octave/scalable/document-save-as.svg \
+  %reldir%/icons/octave/scalable/document-save.svg \
+  %reldir%/icons/octave/scalable/edit-copy.svg \
+  %reldir%/icons/octave/scalable/edit-cut.svg \
+  %reldir%/icons/octave/scalable/edit-find-replace.svg \
+  %reldir%/icons/octave/scalable/edit-find.svg \
+  %reldir%/icons/octave/scalable/edit-paste.svg \
+  %reldir%/icons/octave/scalable/edit-redo.svg \
+  %reldir%/icons/octave/scalable/edit-undo.svg \
+  %reldir%/icons/octave/scalable/figure-axes.svg \
+  %reldir%/icons/octave/scalable/figure-grid.svg \
+  %reldir%/icons/octave/scalable/figure-pan.svg \
+  %reldir%/icons/octave/scalable/figure-rotate.svg \
+  %reldir%/icons/octave/scalable/figure-text.svg \
+  %reldir%/icons/octave/scalable/figure-zoom-in.svg \
+  %reldir%/icons/octave/scalable/figure-zoom-original.svg \
+  %reldir%/icons/octave/scalable/figure-zoom-out.svg \
+  %reldir%/icons/octave/scalable/folder-new.svg \
+  %reldir%/icons/octave/scalable/folder-settings.svg \
+  %reldir%/icons/octave/scalable/folder-up.svg \
+  %reldir%/icons/octave/scalable/folder.svg \
+  %reldir%/icons/octave/scalable/go-down.svg \
+  %reldir%/icons/octave/scalable/go-first.svg \
+  %reldir%/icons/octave/scalable/go-home.svg \
+  %reldir%/icons/octave/scalable/go-last.svg \
+  %reldir%/icons/octave/scalable/go-next.svg \
+  %reldir%/icons/octave/scalable/go-previous.svg \
+  %reldir%/icons/octave/scalable/go-up.svg \
+  %reldir%/icons/octave/scalable/graphic_logo_DocumentationDockWidget.svg \
+  %reldir%/icons/octave/scalable/graphic_logo_Figure.svg \
+  %reldir%/icons/octave/scalable/graphic_logo_FileEditor.svg \
+  %reldir%/icons/octave/scalable/graphic_logo_FilesDockWidget.svg \
+  %reldir%/icons/octave/scalable/graphic_logo_HistoryDockWidget.svg \
+  %reldir%/icons/octave/scalable/graphic_logo_NewsDockWidget.svg \
+  %reldir%/icons/octave/scalable/graphic_logo_ReleaseWidget.svg \
+  %reldir%/icons/octave/scalable/graphic_logo_TerminalDockWidget.svg \
+  %reldir%/icons/octave/scalable/graphic_logo_VariableEditor.svg \
+  %reldir%/icons/octave/scalable/graphic_logo_WorkspaceView.svg \
+  %reldir%/icons/octave/scalable/letter_logo_DocumentationDockWidget.svg \
+  %reldir%/icons/octave/scalable/letter_logo_FileEditor.svg \
+  %reldir%/icons/octave/scalable/letter_logo_FilesDockWidget.svg \
+  %reldir%/icons/octave/scalable/letter_logo_HistoryDockWidget.svg \
+  %reldir%/icons/octave/scalable/letter_logo_NewsDockWidget.svg \
+  %reldir%/icons/octave/scalable/letter_logo_ReleaseWidget.svg \
+  %reldir%/icons/octave/scalable/letter_logo_TerminalDockWidget.svg \
+  %reldir%/icons/octave/scalable/letter_logo_VariableEditor.svg \
+  %reldir%/icons/octave/scalable/letter_logo_WorkspaceView.svg \
+  %reldir%/icons/octave/scalable/plot-xy-curve.svg \
+  %reldir%/icons/octave/scalable/system-run.svg \
+  %reldir%/icons/octave/scalable/user-home.svg \
+  %reldir%/icons/octave/scalable/view-zoom-in.svg \
+  %reldir%/icons/octave/scalable/view-zoom-original.svg \
+  %reldir%/icons/octave/scalable/view-zoom-out.svg \
+  %reldir%/icons/octave/scalable/widget-close-light.svg \
+  %reldir%/icons/octave/scalable/widget-close.svg \
+  %reldir%/icons/octave/scalable/widget-dock-light.svg \
+  %reldir%/icons/octave/scalable/widget-dock.svg \
+  %reldir%/icons/octave/scalable/widget-undock-light.svg \
+  %reldir%/icons/octave/scalable/widget-undock.svg \
+  %reldir%/icons/tango/index.theme \
+  %reldir%/icons/tango/128x128/applications-system.png \
+  %reldir%/icons/tango/128x128/bookmark-new.png \
+  %reldir%/icons/tango/128x128/bp-next.png \
+  %reldir%/icons/tango/128x128/bp-prev.png \
+  %reldir%/icons/tango/128x128/bp-rm-all.png \
+  %reldir%/icons/tango/128x128/bp-toggle.png \
+  %reldir%/icons/tango/128x128/db-cont.png \
+  %reldir%/icons/tango/128x128/db-step-in.png \
+  %reldir%/icons/tango/128x128/db-step-out.png \
+  %reldir%/icons/tango/128x128/db-step.png \
+  %reldir%/icons/tango/128x128/db-stop.png \
+  %reldir%/icons/tango/128x128/dialog-error.png \
+  %reldir%/icons/tango/128x128/dialog-information.png \
+  %reldir%/icons/tango/128x128/dialog-warning.png \
+  %reldir%/icons/tango/128x128/document-new.png \
+  %reldir%/icons/tango/128x128/document-open.png \
+  %reldir%/icons/tango/128x128/document-print.png \
+  %reldir%/icons/tango/128x128/document-save.png \
+  %reldir%/icons/tango/128x128/document-save-as.png \
+  %reldir%/icons/tango/128x128/edit-copy.png \
+  %reldir%/icons/tango/128x128/edit-cut.png \
+  %reldir%/icons/tango/128x128/edit-delete.png \
+  %reldir%/icons/tango/128x128/edit-find-replace.png \
+  %reldir%/icons/tango/128x128/edit-find.png \
+  %reldir%/icons/tango/128x128/edit-paste.png \
+  %reldir%/icons/tango/128x128/edit-redo.png \
+  %reldir%/icons/tango/128x128/edit-undo.png \
+  %reldir%/icons/tango/128x128/folder-new.png \
+  %reldir%/icons/tango/128x128/folder.png \
+  %reldir%/icons/tango/128x128/go-down.png \
+  %reldir%/icons/tango/128x128/go-first.png \
+  %reldir%/icons/tango/128x128/go-home.png \
+  %reldir%/icons/tango/128x128/go-last.png \
+  %reldir%/icons/tango/128x128/go-next.png \
+  %reldir%/icons/tango/128x128/go-previous.png \
+  %reldir%/icons/tango/128x128/go-up.png \
+  %reldir%/icons/tango/128x128/preferences-system.png \
+  %reldir%/icons/tango/128x128/user-home.png \
+  %reldir%/icons/tango/128x128/view-refresh.png \
+  %reldir%/icons/tango/128x128/view-zoom-in.png \
+  %reldir%/icons/tango/128x128/view-zoom-original.png \
+  %reldir%/icons/tango/128x128/view-zoom-out.png \
+  %reldir%/icons/tango/scalable/applications-system.svg \
+  %reldir%/icons/tango/scalable/bookmark-new.svg \
+  %reldir%/icons/tango/scalable/bp-next.svg \
+  %reldir%/icons/tango/scalable/bp-prev.svg \
+  %reldir%/icons/tango/scalable/bp-rm-all.svg \
+  %reldir%/icons/tango/scalable/bp-toggle.svg \
+  %reldir%/icons/tango/scalable/db-cont.svg \
+  %reldir%/icons/tango/scalable/db-step-in.svg \
+  %reldir%/icons/tango/scalable/db-step-out.svg \
+  %reldir%/icons/tango/scalable/db-step.svg \
+  %reldir%/icons/tango/scalable/db-stop.svg \
+  %reldir%/icons/tango/scalable/dialog-error.svg \
+  %reldir%/icons/tango/scalable/dialog-information.svg \
+  %reldir%/icons/tango/scalable/dialog-warning.svg \
+  %reldir%/icons/tango/scalable/document-new.svg \
+  %reldir%/icons/tango/scalable/document-open.svg \
+  %reldir%/icons/tango/scalable/document-print.svg \
+  %reldir%/icons/tango/scalable/document-save.svg \
+  %reldir%/icons/tango/scalable/document-save-as.svg \
+  %reldir%/icons/tango/scalable/edit-copy.svg \
+  %reldir%/icons/tango/scalable/edit-cut.svg \
+  %reldir%/icons/tango/scalable/edit-delete.svg \
+  %reldir%/icons/tango/scalable/edit-find-replace.svg \
+  %reldir%/icons/tango/scalable/edit-find.svg \
+  %reldir%/icons/tango/scalable/edit-paste.svg \
+  %reldir%/icons/tango/scalable/edit-redo.svg \
+  %reldir%/icons/tango/scalable/edit-undo.svg \
+  %reldir%/icons/tango/scalable/folder-new.svg \
+  %reldir%/icons/tango/scalable/folder.svg \
+  %reldir%/icons/tango/scalable/go-down.svg \
+  %reldir%/icons/tango/scalable/go-first.svg \
+  %reldir%/icons/tango/scalable/go-home.svg \
+  %reldir%/icons/tango/scalable/go-last.svg \
+  %reldir%/icons/tango/scalable/go-next.svg \
+  %reldir%/icons/tango/scalable/go-previous.svg \
+  %reldir%/icons/tango/scalable/go-up.svg \
+  %reldir%/icons/tango/scalable/preferences-system.svg \
+  %reldir%/icons/tango/scalable/user-home.svg \
+  %reldir%/icons/tango/scalable/view-refresh.svg \
+  %reldir%/icons/tango/scalable/view-zoom-in.svg \
+  %reldir%/icons/tango/scalable/view-zoom-original.svg \
+  %reldir%/icons/tango/scalable/view-zoom-out.svg
 
 octave_gui_MOC =
 
--- a/libgui/src/octave-dock-widget.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libgui/src/octave-dock-widget.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -73,11 +73,13 @@
           }
       }
 
+    resource_manager& rmgr = m_octave_qobj.get_resource_manager ();
+
     // the custom (extra) title bar of the widget
     m_title_widget = new QWidget ();
 
     m_dock_action = new QAction
-      (QIcon (":/actions/icons/widget-undock.png"), "", this);
+      (rmgr.icon ("widget-undock", true), "", this);
     m_dock_action->setToolTip (tr ("Undock widget"));
     m_dock_button = new QToolButton (m_title_widget);
     m_dock_button->setDefaultAction (m_dock_action);
@@ -85,7 +87,7 @@
     m_dock_button->setIconSize (QSize (m_icon_size, m_icon_size));
 
     m_close_action = new QAction
-      (QIcon (":/actions/icons/widget-close.png"), "", this);
+      (rmgr.icon ("widget-close", true), "", this);
     m_close_action->setToolTip (tr ("Close widget"));
     m_close_button = new QToolButton (m_title_widget);
     m_close_button->setDefaultAction (m_close_action);
@@ -233,13 +235,15 @@
 
     m_close_action->setToolTip (tr ("Hide widget"));
 
-    setStyleSheet (qdockwidget_css (QString (":/actions/icons/widget-close.png"),
-                                    QString ("Close widget"),
-                                    QString (":/actions/icons/widget-undock.png"),
-                                    QString ("Undock widget"),
-                                    m_icon_size,
-                                    QString (""),
-                                    QString ("")));
+    setStyleSheet (qdockwidget_css (
+      global_icon_paths.at (ICON_THEME_OCTAVE) + "widget-close.png",
+      QString ("Close widget"),
+      global_icon_paths.at (ICON_THEME_OCTAVE) + "widget-undock.png",
+      QString ("Undock widget"),
+      m_icon_size,
+      QString (""),
+      QString ("")));
+
     if (widget ())
       widget ()->setToolTip (QString (""));
 
@@ -311,8 +315,8 @@
     // adjust the (un)dock icon
     if (titleBarWidget ())
       {
-        m_dock_action->setIcon (QIcon (":/actions/icons/widget-dock"
-                                       + m_icon_color + ".png"));
+        resource_manager& rmgr = m_octave_qobj.get_resource_manager ();
+        m_dock_action->setIcon (rmgr.icon ("widget-dock" + m_icon_color, true));
         m_dock_action->setToolTip (tr ("Dock widget"));
       }
     else
@@ -370,8 +374,7 @@
              this, &octave_dock_widget::make_window);
     if (titleBarWidget ())
       {
-        m_dock_action->setIcon (QIcon (":/actions/icons/widget-undock"
-                                       + m_icon_color + ".png"));
+        m_dock_action->setIcon (rmgr.icon ("widget-undock" + m_icon_color, true));
         m_dock_action->setToolTip (tr ("Undock widget"));
       }
     else
@@ -798,22 +801,23 @@
         css_background = QString ("");
       }
 
-    QString full_dock_icon = ":/actions/icons/" + dock_icon + icon_col + ".png";
-    QString full_close_icon = ":/actions/icons/widget-close" + icon_col + ".png";
+    QString full_dock_icon = dock_icon + icon_col;
+    QString full_close_icon = "widget-close" + icon_col;
     if (titleBarWidget ())
       {
+        resource_manager& rmgr = m_octave_qobj.get_resource_manager ();
         titleBarWidget ()->setStyleSheet (css_foreground + css_background);
         css_button = QString ("QToolButton {background: transparent; border: 0px;}");
         m_dock_button->setStyleSheet (css_button);
         m_close_button->setStyleSheet (css_button);
-        m_dock_action->setIcon (QIcon (full_dock_icon));
-        m_close_action->setIcon (QIcon (full_close_icon));
+        m_dock_action->setIcon (rmgr.icon (full_dock_icon, true));
+        m_close_action->setIcon (rmgr.icon (full_close_icon, true));
       }
     else
       {
-        setStyleSheet (qdockwidget_css (full_close_icon,
+        setStyleSheet (qdockwidget_css (global_icon_paths.at (ICON_THEME_OCTAVE) + full_close_icon + ".png",
                                         close_tooltip,
-                                        full_dock_icon,
+                                        global_icon_paths.at (ICON_THEME_OCTAVE) + full_dock_icon + ".png",
                                         dock_tooltip,
                                         m_icon_size,
                                         css_foreground,
--- a/libgui/src/octave-qobject.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libgui/src/octave-qobject.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -313,6 +313,7 @@
 
             // After settings.
             config_translators ();
+            m_resource_manager.config_icon_theme ();
 
             // Initilize the shortcut-manager
             m_shortcut_manager.init_data ();
@@ -473,10 +474,13 @@
                      this, &base_qobject::interpreter_stop);
 
             connect (qt_link (), &qt_interpreter_events::interpreter_output_signal,
-                     m_terminal_widget, &terminal_dock_widget::interpreter_output);
+                     m_terminal_widget, &terminal_dock_widget::interpreter_output_signal);
 
             connect (qt_link (), &qt_interpreter_events::update_prompt_signal,
-                     m_terminal_widget, &terminal_dock_widget::update_prompt);
+                     m_terminal_widget, &terminal_dock_widget::update_prompt_signal);
+
+            connect (qt_link (), &qt_interpreter_events::new_command_line_signal,
+                     m_terminal_widget, &terminal_dock_widget::new_command_line_signal);
 
             connect_interpreter_events (cmd_widget);
           }
@@ -731,7 +735,7 @@
   QPointer<release_notes> base_qobject::release_notes_widget (void)
   {
     if (! m_release_notes)
-      m_release_notes = QPointer<release_notes> (new release_notes ());
+      m_release_notes = QPointer<release_notes> (new release_notes (*this));
 
     return m_release_notes;
   }
--- a/libgui/src/qt-interpreter-events.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libgui/src/qt-interpreter-events.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -510,9 +510,12 @@
     if (m_octave_qobj.experimental_terminal_widget ()
         && m_octave_qobj.have_terminal_window ())
       {
+        // Output the exception message
         std::ostringstream buf;
         ee.display (buf);
         emit interpreter_output_signal (QString::fromStdString (buf.str ()));
+        // Create w new command line
+        emit new_command_line_signal ();
       }
     else
       {
--- a/libgui/src/qt-interpreter-events.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libgui/src/qt-interpreter-events.h	Mon Aug 29 13:58:00 2022 +0200
@@ -287,8 +287,9 @@
     void show_community_news_signal (int serial);
     void show_release_notes_signal (void);
 
-    // Note: this signal currently not used by the old terminal widget.
+    // Note: the next two signals are currently not used by the old terminal widget.
     void interpreter_output_signal (const QString& msg);
+    void new_command_line_signal (const QString& msg = QString ());
 
     void gui_status_update_signal (const QString& feature, const QString& status);
 
--- a/libgui/src/release-notes.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libgui/src/release-notes.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -38,6 +38,7 @@
 
 #include "release-notes.h"
 #include "gui-utils.h"
+#include "gui-preferences-dw.h"
 #include "gui-preferences-nr.h"
 #include "news-reader.h"
 #include "octave-qobject.h"
@@ -46,19 +47,20 @@
 
 namespace octave
 {
-  release_notes::release_notes (void)
-    : QWidget (nullptr), m_browser (nullptr),
-      m_release_notes_icon (":/actions/icons/logo.png")
+  release_notes::release_notes (base_qobject& oct_qobj)
+    : QWidget (nullptr), m_browser (nullptr)
   {
-#if 0
-    // The following code was in main-window.cc.  How should that be
-    // handled here?
-    if (dw_icon_set_names[icon_set_found].name != "NONE")
-      m_release_notes_icon = dw_icon_set_names[icon_set_found].path
+
+    resource_manager& rmgr = oct_qobj.get_resource_manager ();
+    gui_settings *settings = rmgr.get_settings ();
+
+    // The icon
+    QString icon_set = settings->value (dw_icon_set).toString ();
+    if (icon_set != "NONE")
+      m_release_notes_icon = dw_icon_set_names[icon_set]
                              + "ReleaseWidget.png";
     else
-      m_release_notes_icon = ":/actions/icons/logo.png";
-#endif
+      m_release_notes_icon = dw_icon_set_names[icon_set];
 
     std::string news_file = config::oct_etc_dir () + "/NEWS";
 
--- a/libgui/src/release-notes.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libgui/src/release-notes.h	Mon Aug 29 13:58:00 2022 +0200
@@ -41,7 +41,7 @@
 
   public:
 
-    release_notes (void);
+    release_notes (base_qobject& qct_qobj);
 
     ~release_notes (void) = default;
 
--- a/libgui/src/resource-manager.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libgui/src/resource-manager.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -27,6 +27,8 @@
 #  include "config.h"
 #endif
 
+#include <unistd.h>
+
 #include <algorithm>
 #include <array>
 #include <string>
@@ -38,11 +40,7 @@
 #include <QLibraryInfo>
 #include <QMessageBox>
 #include <QNetworkProxy>
-#if defined (HAVE_QSTANDARDPATHS)
-#  include <QStandardPaths>
-#else
-#  include <QDesktopServices>
-#endif
+#include <QStandardPaths>
 
 #include <QTextCodec>
 
@@ -67,7 +65,7 @@
 {
   resource_manager::resource_manager (void)
     : m_settings_directory (), m_settings_file (), m_settings (nullptr),
-      m_default_settings (nullptr), m_temporary_files ()
+      m_default_settings (nullptr), m_temporary_files (), m_icon_fallbacks ()
   {
     // Let gui_settings decide where to put the ini file with gui preferences
     m_default_settings
@@ -185,6 +183,52 @@
 
   }
 
+  void resource_manager::config_icon_theme (void)
+  {
+    m_icon_fallbacks.clear ();
+
+    int theme = global_icon_theme_index.def.toInt ();
+
+    if (m_settings)
+      {
+       // check for new and old setting and use old if required
+       if (! m_settings->contains (global_icon_theme_index.key))
+         {
+           // new pref does not exist
+           if (m_settings->value (global_icon_theme).toBool ())
+             theme = ICON_THEME_SYSTEM;
+           else
+             theme = ICON_THEME_OCTAVE;
+           m_settings->setValue (global_icon_theme_index.key, theme);  // add new
+           m_settings->remove (global_icon_theme.key); // remove deprecated key
+         }
+       else
+         {
+           // get new settings
+           theme = m_settings->value (global_icon_theme_index).toInt ();
+         }
+      }
+
+   QIcon::setThemeName (global_all_icon_themes.at (theme));
+
+   // set the required fallback search paths
+   switch (theme)
+    {
+      case ICON_THEME_SYSTEM:
+        m_icon_fallbacks << global_icon_paths.at (ICON_THEME_OCTAVE);
+        m_icon_fallbacks << global_icon_paths.at (ICON_THEME_TANGO);
+        break;
+      case ICON_THEME_TANGO:
+        m_icon_fallbacks << global_icon_paths.at (ICON_THEME_OCTAVE);
+        break;
+      case ICON_THEME_OCTAVE:
+        m_icon_fallbacks << global_icon_paths.at (ICON_THEME_TANGO);
+        break;
+    }
+
+    m_icon_fallbacks << global_icon_paths.at (ICON_THEME_CURSORS);
+  }
+
   gui_settings * resource_manager::get_settings (void) const
   {
     return m_settings;
@@ -581,19 +625,26 @@
     sys::env::putenv ("HTTPS_PROXY", proxy_url_str);
   }
 
-  QIcon resource_manager::icon (const QString& icon_name, bool fallback)
+  QIcon resource_manager::icon (const QString& icon_name, bool octave_only,
+                                const QString& icon_alt_name)
   {
-    // If system icon theme is not desired, take own icon files
-    if (! m_settings->value (global_icon_theme).toBool ())
-      return QIcon (":/actions/icons/" + icon_name + ".png");
+    if (octave_only)
+      return QIcon (global_icon_paths.at (ICON_THEME_OCTAVE) + icon_name + ".png");
 
-    // Use system icon theme with own files as fallback except when the
-    // fallback is explicitly disabled (fallback=false)
-    if (fallback)
-      return QIcon::fromTheme (icon_name,
-                               QIcon (":/actions/icons/" + icon_name + ".png"));
-    else
-      return QIcon::fromTheme (icon_name);
+    if (QIcon::hasThemeIcon (icon_name))
+      return QIcon (QIcon::fromTheme (icon_name));
+    else if ((! icon_alt_name.isEmpty ()) && QIcon::hasThemeIcon (icon_alt_name))
+      return QIcon (QIcon::fromTheme (icon_alt_name));
+
+    for (int i = 0; i < m_icon_fallbacks.length (); i++ )
+      {
+        QString icon_file (m_icon_fallbacks.at (i) + icon_name + ".png");
+        if (QFile (icon_file).exists ())
+          return QIcon (icon_file);
+      }
+
+      //QIcon::setThemeName (current_theme);
+      return QIcon ();
   }
 
   // get a list of all available encodings
@@ -676,6 +727,7 @@
     combo->setMaxVisibleItems (12);
   }
 
+
   QPointer<QTemporaryFile>
   resource_manager::create_tmp_file (const QString& extension,
                                      const QString& contents)
@@ -685,8 +737,7 @@
       ext = QString (".") + ext;
 
     // Create octave dir within temp. dir
-    QString tmp_dir = QDir::tempPath () + QDir::separator() + "octave";
-    QDir::temp ().mkdir ("octave");
+    QString tmp_dir = QString::fromStdString (sys::env::get_temp_directory ());
 
     // Create temp. file
     QPointer<QTemporaryFile> tmp_file
--- a/libgui/src/resource-manager.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libgui/src/resource-manager.h	Mon Aug 29 13:58:00 2022 +0200
@@ -61,6 +61,7 @@
 
     void config_translators (QTranslator *qt_tr, QTranslator *qsci_tr,
                              QTranslator *gui_tr);
+    void config_icon_theme (void);
 
     gui_settings * get_settings (void) const;
 
@@ -96,7 +97,8 @@
 
     void update_network_settings (void);
 
-    QIcon icon (const QString& icon_name, bool fallback = true);
+    QIcon icon (const QString& icon_name, bool octave_only = false,
+                const QString& icon_alt_name = QString ());
 
     void get_codecs (QStringList *codecs);
 
@@ -122,6 +124,8 @@
     gui_settings *m_default_settings;
 
     QList<QTemporaryFile *> m_temporary_files;
+
+    QStringList m_icon_fallbacks;
   };
 }
 
--- a/libgui/src/resource.qrc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libgui/src/resource.qrc	Mon Aug 29 13:58:00 2022 +0200
@@ -1,94 +1,136 @@
 <RCC>
-    <qresource prefix="/actions">
-        <file>icons/applications-system.png</file>
-        <file>icons/bookmark-new.png</file>
-        <file>icons/bp-toggle.png</file>
-        <file>icons/bp-rm-all.png</file>
-        <file>icons/bp-prev.png</file>
-        <file>icons/bp-next.png</file>
-        <file>icons/bottom_left_corner.png</file>
-        <file>icons/bottom_right_corner.png</file>
-        <file>icons/bottom_side.png</file>
-        <file>icons/circle.png</file>
-        <file>icons/cross.png</file>
-        <file>icons/db-cont.png</file>
-        <file>icons/db-step.png</file>
-        <file>icons/db-step-in.png</file>
-        <file>icons/db-step-out.png</file>
-        <file>icons/db-stop.png</file>
-        <file>icons/dialog-error.png</file>
-        <file>icons/dialog-information.png</file>
-        <file>icons/dialog-warning.png</file>
-        <file>icons/document-new.png</file>
-        <file>icons/document-open.png</file>
-        <file>icons/document-print.png</file>
-        <file>icons/document-save.png</file>
-        <file>icons/document-save-as.png</file>
-        <file>icons/edit-copy.png</file>
-        <file>icons/edit-cut.png</file>
-        <file>icons/edit-delete.png</file>
-        <file>icons/edit-find.png</file>
-        <file>icons/edit-find-replace.png</file>
-        <file>icons/edit-paste.png</file>
-        <file>icons/edit-redo.png</file>
-        <file>icons/edit-undo.png</file>
-        <file>icons/figure-axes.png</file>
-        <file>icons/figure-grid.png</file>
-        <file>icons/figure-pan.png</file>
-        <file>icons/figure-rotate.png</file>
-        <file>icons/figure-text.png</file>
-        <file>icons/figure-zoom-in.png</file>
-        <file>icons/figure-zoom-original.png</file>
-        <file>icons/figure-zoom-out.png</file>
-        <file>icons/folder.png</file>
-        <file>icons/folder-new.png</file>
-        <file>icons/go-down.png</file>
-        <file>icons/go-first.png</file>
-        <file>icons/go-home.png</file>
-        <file>icons/go-last.png</file>
-        <file>icons/go-next.png</file>
-        <file>icons/go-previous.png</file>
-        <file>icons/go-up.png</file>
-        <file>icons/graphic_logo_FilesDockWidget.png</file>
-        <file>icons/graphic_logo_Figure.png</file>
-        <file>icons/graphic_logo_FileEditor.png</file>
-        <file>icons/graphic_logo_NewsDockWidget.png</file>
-        <file>icons/graphic_logo_TerminalDockWidget.png</file>
-        <file>icons/graphic_logo_HistoryDockWidget.png</file>
-        <file>icons/graphic_logo_WorkspaceView.png</file>
-        <file>icons/graphic_logo_DocumentationDockWidget.png</file>
-        <file>icons/graphic_logo_ReleaseWidget.png</file>
-        <file>icons/graphic_logo_VariableEditor.png</file>
-        <file>icons/fleur.png</file>
-        <file>icons/hand2.png</file>
-        <file>icons/left_side.png</file>
-        <file>icons/letter_logo_FilesDockWidget.png</file>
-        <file>icons/letter_logo_FileEditor.png</file>
-        <file>icons/letter_logo_NewsDockWidget.png</file>
-        <file>icons/letter_logo_TerminalDockWidget.png</file>
-        <file>icons/letter_logo_HistoryDockWidget.png</file>
-        <file>icons/letter_logo_WorkspaceView.png</file>
-        <file>icons/letter_logo_DocumentationDockWidget.png</file>
-        <file>icons/letter_logo_ReleaseWidget.png</file>
-        <file>icons/letter_logo_VariableEditor.png</file>
-        <file>icons/logo.png</file>
-        <file>icons/plot-xy-curve.png</file>
-        <file>icons/preferences-system.png</file>
-        <file>icons/right_side.png</file>
-        <file>icons/system-run.png</file>
-        <file>icons/top_left_corner.png</file>
-        <file>icons/top_right_corner.png</file>
-        <file>icons/top_side.png</file>
-        <file>icons/user-home.png</file>
-        <file>icons/view-refresh.png</file>
-        <file>icons/widget-close.png</file>
-        <file>icons/widget-dock.png</file>
-        <file>icons/widget-undock.png</file>
-        <file>icons/widget-close-light.png</file>
-        <file>icons/widget-dock-light.png</file>
-        <file>icons/widget-undock-light.png</file>
-        <file>icons/zoom-in.png</file>
-        <file>icons/zoom-original.png</file>
-        <file>icons/zoom-out.png</file>
+    <qresource prefix="/">
+        <file>icons/cursors/bottom_left_corner.png</file>
+        <file>icons/cursors/bottom_right_corner.png</file>
+        <file>icons/cursors/bottom_side.png</file>
+        <file>icons/cursors/circle.png</file>
+        <file>icons/cursors/cross.png</file>
+        <file>icons/cursors/fleur.png</file>
+        <file>icons/cursors/hand2.png</file>
+        <file>icons/cursors/left_side.png</file>
+        <file>icons/cursors/right_side.png</file>
+        <file>icons/cursors/top_left_corner.png</file>
+        <file>icons/cursors/top_right_corner.png</file>
+        <file>icons/cursors/top_side.png</file>
+        <file>icons/octave/128x128/applications-system.png</file>
+        <file>icons/octave/128x128/bookmark-new.png</file>
+        <file>icons/octave/128x128/bp-toggle.png</file>
+        <file>icons/octave/128x128/bp-rm-all.png</file>
+        <file>icons/octave/128x128/bp-prev.png</file>
+        <file>icons/octave/128x128/bp-next.png</file>
+        <file>icons/octave/128x128/db-cont.png</file>
+        <file>icons/octave/128x128/db-step.png</file>
+        <file>icons/octave/128x128/db-step-in.png</file>
+        <file>icons/octave/128x128/db-step-out.png</file>
+        <file>icons/octave/128x128/db-stop.png</file>
+        <file>icons/octave/128x128/dialog-information.png</file>
+        <file>icons/octave/128x128/dialog-error.png</file>
+        <file>icons/octave/128x128/document-new.png</file>
+        <file>icons/octave/128x128/document-open.png</file>
+        <file>icons/octave/128x128/document-print.png</file>
+        <file>icons/octave/128x128/document-save-as.png</file>
+        <file>icons/octave/128x128/document-save.png</file>
+        <file>icons/octave/128x128/edit-copy.png</file>
+        <file>icons/octave/128x128/edit-cut.png</file>
+        <file>icons/octave/128x128/edit-find-replace.png</file>
+        <file>icons/octave/128x128/edit-find.png</file>
+        <file>icons/octave/128x128/edit-paste.png</file>
+        <file>icons/octave/128x128/edit-redo.png</file>
+        <file>icons/octave/128x128/edit-undo.png</file>
+        <file>icons/octave/128x128/figure-axes.png</file>
+        <file>icons/octave/128x128/figure-grid.png</file>
+        <file>icons/octave/128x128/figure-pan.png</file>
+        <file>icons/octave/128x128/figure-rotate.png</file>
+        <file>icons/octave/128x128/figure-text.png</file>
+        <file>icons/octave/128x128/figure-zoom-in.png</file>
+        <file>icons/octave/128x128/figure-zoom-original.png</file>
+        <file>icons/octave/128x128/figure-zoom-out.png</file>
+        <file>icons/octave/128x128/folder.png</file>
+        <file>icons/octave/128x128/folder-new.png</file>
+        <file>icons/octave/128x128/folder-settings.png</file>
+        <file>icons/octave/128x128/folder-up.png</file>
+        <file>icons/octave/128x128/go-down.png</file>
+        <file>icons/octave/128x128/go-first.png</file>
+        <file>icons/octave/128x128/go-home.png</file>
+        <file>icons/octave/128x128/go-last.png</file>
+        <file>icons/octave/128x128/go-next.png</file>
+        <file>icons/octave/128x128/go-previous.png</file>
+        <file>icons/octave/128x128/go-up.png</file>
+        <file>icons/octave/128x128/graphic_logo_FilesDockWidget.png</file>
+        <file>icons/octave/128x128/graphic_logo_Figure.png</file>
+        <file>icons/octave/128x128/graphic_logo_FileEditor.png</file>
+        <file>icons/octave/128x128/graphic_logo_NewsDockWidget.png</file>
+        <file>icons/octave/128x128/graphic_logo_TerminalDockWidget.png</file>
+        <file>icons/octave/128x128/graphic_logo_HistoryDockWidget.png</file>
+        <file>icons/octave/128x128/graphic_logo_WorkspaceView.png</file>
+        <file>icons/octave/128x128/graphic_logo_DocumentationDockWidget.png</file>
+        <file>icons/octave/128x128/graphic_logo_ReleaseWidget.png</file>
+        <file>icons/octave/128x128/graphic_logo_VariableEditor.png</file>
+        <file>icons/octave/128x128/letter_logo_FilesDockWidget.png</file>
+        <file>icons/octave/128x128/letter_logo_FileEditor.png</file>
+        <file>icons/octave/128x128/letter_logo_NewsDockWidget.png</file>
+        <file>icons/octave/128x128/letter_logo_TerminalDockWidget.png</file>
+        <file>icons/octave/128x128/letter_logo_HistoryDockWidget.png</file>
+        <file>icons/octave/128x128/letter_logo_WorkspaceView.png</file>
+        <file>icons/octave/128x128/letter_logo_DocumentationDockWidget.png</file>
+        <file>icons/octave/128x128/letter_logo_ReleaseWidget.png</file>
+        <file>icons/octave/128x128/letter_logo_VariableEditor.png</file>
+        <file>icons/octave/128x128/logo.png</file>
+        <file>icons/octave/128x128/plot-xy-curve.png</file>
+        <file>icons/octave/128x128/system-run.png</file>
+        <file>icons/octave/128x128/user-home.png</file>
+        <file>icons/octave/128x128/view-zoom-in.png</file>
+        <file>icons/octave/128x128/view-zoom-original.png</file>
+        <file>icons/octave/128x128/view-zoom-out.png</file>
+        <file>icons/octave/128x128/widget-close.png</file>
+        <file>icons/octave/128x128/widget-dock.png</file>
+        <file>icons/octave/128x128/widget-undock.png</file>
+        <file>icons/octave/128x128/widget-close-light.png</file>
+        <file>icons/octave/128x128/widget-dock-light.png</file>
+        <file>icons/octave/128x128/widget-undock-light.png</file>
+        <file>icons/octave/index.theme</file>
+        <file>icons/tango/128x128/applications-system.png</file>
+        <file>icons/tango/128x128/bookmark-new.png</file>
+        <file>icons/tango/128x128/bp-toggle.png</file>
+        <file>icons/tango/128x128/bp-rm-all.png</file>
+        <file>icons/tango/128x128/bp-prev.png</file>
+        <file>icons/tango/128x128/bp-next.png</file>
+        <file>icons/tango/128x128/db-cont.png</file>
+        <file>icons/tango/128x128/db-step.png</file>
+        <file>icons/tango/128x128/db-step-in.png</file>
+        <file>icons/tango/128x128/db-step-out.png</file>
+        <file>icons/tango/128x128/db-stop.png</file>
+        <file>icons/tango/128x128/dialog-error.png</file>
+        <file>icons/tango/128x128/dialog-information.png</file>
+        <file>icons/tango/128x128/dialog-warning.png</file>
+        <file>icons/tango/128x128/document-new.png</file>
+        <file>icons/tango/128x128/document-open.png</file>
+        <file>icons/tango/128x128/document-print.png</file>
+        <file>icons/tango/128x128/document-save.png</file>
+        <file>icons/tango/128x128/document-save-as.png</file>
+        <file>icons/tango/128x128/edit-copy.png</file>
+        <file>icons/tango/128x128/edit-cut.png</file>
+        <file>icons/tango/128x128/edit-delete.png</file>
+        <file>icons/tango/128x128/edit-find.png</file>
+        <file>icons/tango/128x128/edit-find-replace.png</file>
+        <file>icons/tango/128x128/edit-paste.png</file>
+        <file>icons/tango/128x128/edit-redo.png</file>
+        <file>icons/tango/128x128/edit-undo.png</file>
+        <file>icons/tango/128x128/folder.png</file>
+        <file>icons/tango/128x128/folder-new.png</file>
+        <file>icons/tango/128x128/go-down.png</file>
+        <file>icons/tango/128x128/go-first.png</file>
+        <file>icons/tango/128x128/go-home.png</file>
+        <file>icons/tango/128x128/go-last.png</file>
+        <file>icons/tango/128x128/go-next.png</file>
+        <file>icons/tango/128x128/go-previous.png</file>
+        <file>icons/tango/128x128/go-up.png</file>
+        <file>icons/tango/128x128/preferences-system.png</file>
+        <file>icons/tango/128x128/user-home.png</file>
+        <file>icons/tango/128x128/view-refresh.png</file>
+        <file>icons/tango/128x128/view-zoom-in.png</file>
+        <file>icons/tango/128x128/view-zoom-original.png</file>
+        <file>icons/tango/128x128/view-zoom-out.png</file>
+        <file>icons/tango/index.theme</file>
     </qresource>
 </RCC>
--- a/libgui/src/settings-dialog.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libgui/src/settings-dialog.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -116,6 +116,7 @@
 
     // Global style
     QStringList styles = QStyleFactory::keys();
+    styles.append (global_extra_styles);
     combo_styles->addItems (styles);
     combo_styles->insertItem (0, global_style.def.toString ());
     combo_styles->insertSeparator (1);
@@ -137,7 +138,9 @@
     icon_size_normal->setChecked (true);  // the default
     icon_size_small->setChecked (icon_size < 0);
     icon_size_large->setChecked (icon_size > 0);
-    cb_system_icon_theme->setChecked (settings->value (global_icon_theme).toBool ());
+    combo_box_icon_theme->addItems (global_all_icon_theme_names);
+    int theme = settings->value (global_icon_theme_index.key).toInt ();
+    combo_box_icon_theme->setCurrentIndex (theme);
 
     // which icon has to be selected
     QButtonGroup *icon_group = new QButtonGroup (this);
@@ -1020,7 +1023,7 @@
     // icon size and theme
     int icon_size = icon_size_large->isChecked () - icon_size_small->isChecked ();
     settings->setValue (global_icon_size.key, icon_size);
-    settings->setValue (global_icon_theme.key, cb_system_icon_theme->isChecked ());
+    settings->setValue (global_icon_theme_index.key, combo_box_icon_theme->currentIndex ());
 
     // native file dialogs
     settings->setValue (global_use_native_dialogs.key, cb_use_native_file_dialogs->isChecked ());
--- a/libgui/src/settings-dialog.ui	Sun Aug 28 22:44:49 2022 +0200
+++ b/libgui/src/settings-dialog.ui	Mon Aug 29 13:58:00 2022 +0200
@@ -35,7 +35,7 @@
       <string/>
      </property>
      <property name="currentIndex">
-      <number>6</number>
+      <number>0</number>
      </property>
      <widget class="QWidget" name="tab_general">
       <property name="enabled">
@@ -55,8 +55,8 @@
            <rect>
             <x>0</x>
             <y>0</y>
-            <width>657</width>
-            <height>629</height>
+            <width>1021</width>
+            <height>618</height>
            </rect>
           </property>
           <layout class="QVBoxLayout" name="verticalLayout_17">
@@ -68,30 +68,44 @@
              <layout class="QVBoxLayout" name="verticalLayout_21">
               <item>
                <layout class="QGridLayout" name="gridLayout">
-                <item row="1" column="1">
-                 <layout class="QHBoxLayout" name="horizontalLayout_8">
+                <item row="7" column="0">
+                 <widget class="QLabel" name="label_15">
+                  <property name="text">
+                   <string>Dock widget title bar</string>
+                  </property>
+                  <property name="alignment">
+                   <set>Qt::AlignLeading|Qt::AlignLeft|Qt::AlignTop</set>
+                  </property>
+                 </widget>
+                </item>
+                <item row="5" column="0">
+                 <widget class="QLabel" name="label_9">
+                  <property name="text">
+                   <string>Dock widgets window icons</string>
+                  </property>
+                 </widget>
+                </item>
+                <item row="2" column="0">
+                 <widget class="QLabel" name="label_29">
+                  <property name="text">
+                   <string>Style</string>
+                  </property>
+                 </widget>
+                </item>
+                <item row="2" column="1">
+                 <layout class="QHBoxLayout" name="horizontalLayout_17">
                   <item>
-                   <widget class="QComboBox" name="comboBox_language">
+                   <widget class="QComboBox" name="combo_styles">
                     <property name="minimumSize">
                      <size>
                       <width>135</width>
                       <height>0</height>
                      </size>
                     </property>
-                    <property name="insertPolicy">
-                     <enum>QComboBox::InsertAtBottom</enum>
-                    </property>
                    </widget>
                   </item>
                   <item>
-                   <widget class="QLabel" name="label_10">
-                    <property name="text">
-                     <string>(requires restart)</string>
-                    </property>
-                   </widget>
-                  </item>
-                  <item>
-                   <spacer name="horizontalSpacer_3">
+                   <spacer name="horizontalSpacer">
                     <property name="orientation">
                      <enum>Qt::Horizontal</enum>
                     </property>
@@ -105,19 +119,26 @@
                   </item>
                  </layout>
                 </item>
-                <item row="7" column="0">
-                 <widget class="QLabel" name="label_15">
+                <item row="1" column="0">
+                 <widget class="QLabel" name="label_2">
                   <property name="text">
-                   <string>Dock widget title bar</string>
-                  </property>
-                  <property name="alignment">
-                   <set>Qt::AlignLeading|Qt::AlignLeft|Qt::AlignTop</set>
+                   <string>Language</string>
                   </property>
                  </widget>
                 </item>
                 <item row="3" column="1">
-                 <layout class="QVBoxLayout" name="verticalLayout_5">
-                  <item>
+                 <layout class="QGridLayout" name="gridLayout_16">
+                  <item row="1" column="0">
+                   <widget class="QLabel" name="label_4">
+                    <property name="text">
+                     <string>Icon theme (requires restart)</string>
+                    </property>
+                   </widget>
+                  </item>
+                  <item row="1" column="1">
+                   <widget class="QComboBox" name="combo_box_icon_theme"/>
+                  </item>
+                  <item row="0" column="0">
                    <layout class="QHBoxLayout" name="horizontalLayout_6">
                     <item>
                      <widget class="QRadioButton" name="icon_size_small">
@@ -143,58 +164,10 @@
                       </property>
                      </widget>
                     </item>
-                    <item>
-                     <spacer name="horizontalSpacer_4">
-                      <property name="orientation">
-                       <enum>Qt::Horizontal</enum>
-                      </property>
-                      <property name="sizeHint" stdset="0">
-                       <size>
-                        <width>40</width>
-                        <height>20</height>
-                       </size>
-                      </property>
-                     </spacer>
-                    </item>
                    </layout>
                   </item>
-                  <item>
-                   <widget class="QCheckBox" name="cb_system_icon_theme">
-                    <property name="text">
-                     <string>Use system icon theme if available (requires restart)</string>
-                    </property>
-                   </widget>
-                  </item>
-                 </layout>
-                </item>
-                <item row="5" column="1">
-                 <layout class="QHBoxLayout" name="horizontalLayout_9">
-                  <item>
-                   <widget class="QRadioButton" name="general_icon_octave">
-                    <property name="text">
-                     <string>Octave logo only</string>
-                    </property>
-                    <property name="checked">
-                     <bool>true</bool>
-                    </property>
-                   </widget>
-                  </item>
-                  <item>
-                   <widget class="QRadioButton" name="general_icon_letter">
-                    <property name="text">
-                     <string>Letter icons</string>
-                    </property>
-                   </widget>
-                  </item>
-                  <item>
-                   <widget class="QRadioButton" name="general_icon_graphic">
-                    <property name="text">
-                     <string>Graphic icons</string>
-                    </property>
-                   </widget>
-                  </item>
-                  <item>
-                   <spacer name="horizontalSpacer_6">
+                  <item row="1" column="2">
+                   <spacer name="horizontalSpacer_5">
                     <property name="orientation">
                      <enum>Qt::Horizontal</enum>
                     </property>
@@ -208,23 +181,6 @@
                   </item>
                  </layout>
                 </item>
-                <item row="3" column="0">
-                 <widget class="QLabel" name="label_8">
-                  <property name="text">
-                   <string>Toolbar Icons</string>
-                  </property>
-                  <property name="alignment">
-                   <set>Qt::AlignLeading|Qt::AlignLeft|Qt::AlignTop</set>
-                  </property>
-                 </widget>
-                </item>
-                <item row="5" column="0">
-                 <widget class="QLabel" name="label_9">
-                  <property name="text">
-                   <string>Icon set for dock widgets</string>
-                  </property>
-                 </widget>
-                </item>
                 <item row="7" column="1">
                  <layout class="QHBoxLayout" name="horizontalLayout_4">
                   <item>
@@ -387,27 +343,40 @@
                   </item>
                  </layout>
                 </item>
-                <item row="1" column="0">
-                 <widget class="QLabel" name="label_2">
+                <item row="3" column="0">
+                 <widget class="QLabel" name="label_8">
                   <property name="text">
-                   <string>Language</string>
+                   <string>Toolbar Icons</string>
+                  </property>
+                  <property name="alignment">
+                   <set>Qt::AlignLeading|Qt::AlignLeft|Qt::AlignTop</set>
                   </property>
                  </widget>
                 </item>
-                <item row="2" column="1">
-                 <layout class="QHBoxLayout" name="horizontalLayout_17">
+                <item row="1" column="1">
+                 <layout class="QHBoxLayout" name="horizontalLayout_8">
                   <item>
-                   <widget class="QComboBox" name="combo_styles">
+                   <widget class="QComboBox" name="comboBox_language">
                     <property name="minimumSize">
                      <size>
                       <width>135</width>
                       <height>0</height>
                      </size>
                     </property>
+                    <property name="insertPolicy">
+                     <enum>QComboBox::InsertAtBottom</enum>
+                    </property>
                    </widget>
                   </item>
                   <item>
-                   <spacer name="horizontalSpacer">
+                   <widget class="QLabel" name="label_10">
+                    <property name="text">
+                     <string>(requires restart)</string>
+                    </property>
+                   </widget>
+                  </item>
+                  <item>
+                   <spacer name="horizontalSpacer_3">
                     <property name="orientation">
                      <enum>Qt::Horizontal</enum>
                     </property>
@@ -421,12 +390,46 @@
                   </item>
                  </layout>
                 </item>
-                <item row="2" column="0">
-                 <widget class="QLabel" name="label_29">
-                  <property name="text">
-                   <string>Style</string>
-                  </property>
-                 </widget>
+                <item row="5" column="1">
+                 <layout class="QHBoxLayout" name="horizontalLayout_9">
+                  <item>
+                   <widget class="QRadioButton" name="general_icon_octave">
+                    <property name="text">
+                     <string>Octave logo only</string>
+                    </property>
+                    <property name="checked">
+                     <bool>true</bool>
+                    </property>
+                   </widget>
+                  </item>
+                  <item>
+                   <widget class="QRadioButton" name="general_icon_letter">
+                    <property name="text">
+                     <string>Letter icons</string>
+                    </property>
+                   </widget>
+                  </item>
+                  <item>
+                   <widget class="QRadioButton" name="general_icon_graphic">
+                    <property name="text">
+                     <string>Graphic icons</string>
+                    </property>
+                   </widget>
+                  </item>
+                  <item>
+                   <spacer name="horizontalSpacer_6">
+                    <property name="orientation">
+                     <enum>Qt::Horizontal</enum>
+                    </property>
+                    <property name="sizeHint" stdset="0">
+                     <size>
+                      <width>40</width>
+                      <height>20</height>
+                     </size>
+                    </property>
+                   </spacer>
+                  </item>
+                 </layout>
                 </item>
                </layout>
               </item>
@@ -584,8 +587,8 @@
            <rect>
             <x>0</x>
             <y>0</y>
-            <width>668</width>
-            <height>267</height>
+            <width>1035</width>
+            <height>569</height>
            </rect>
           </property>
           <layout class="QVBoxLayout" name="verticalLayout_7">
@@ -865,8 +868,8 @@
            <rect>
             <x>0</x>
             <y>0</y>
-            <width>765</width>
-            <height>1515</height>
+            <width>1021</width>
+            <height>1497</height>
            </rect>
           </property>
           <layout class="QVBoxLayout" name="verticalLayout_16">
@@ -2173,8 +2176,8 @@
            <rect>
             <x>0</x>
             <y>0</y>
-            <width>595</width>
-            <height>410</height>
+            <width>1035</width>
+            <height>569</height>
            </rect>
           </property>
           <layout class="QGridLayout" name="gridLayout_8">
@@ -2323,8 +2326,8 @@
            <rect>
             <x>0</x>
             <y>0</y>
-            <width>259</width>
-            <height>67</height>
+            <width>1035</width>
+            <height>569</height>
            </rect>
           </property>
           <layout class="QVBoxLayout" name="verticalLayout_19">
@@ -2385,8 +2388,8 @@
            <rect>
             <x>0</x>
             <y>0</y>
-            <width>605</width>
-            <height>233</height>
+            <width>1035</width>
+            <height>569</height>
            </rect>
           </property>
           <layout class="QVBoxLayout" name="verticalLayout_vesc_manual">
@@ -2770,8 +2773,8 @@
            <rect>
             <x>0</x>
             <y>0</y>
-            <width>703</width>
-            <height>310</height>
+            <width>1035</width>
+            <height>569</height>
            </rect>
           </property>
           <layout class="QVBoxLayout" name="verticalLayout_20">
--- a/libgui/src/terminal-dock-widget.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libgui/src/terminal-dock-widget.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -53,6 +53,7 @@
     if (m_experimental_terminal_widget)
       {
         command_widget *widget = new command_widget (oct_qobj, this);
+        console *con = widget->get_console ();
 
         connect (this, &terminal_dock_widget::settings_changed,
                  widget, &command_widget::notice_settings);
@@ -63,6 +64,12 @@
         connect (this, &terminal_dock_widget::interpreter_output_signal,
                  widget, &command_widget::insert_interpreter_output);
 
+        connect (this, &terminal_dock_widget::execute_command_signal,
+                con, &console::execute_command);
+
+        connect (this, &terminal_dock_widget::new_command_line_signal,
+                con, &console::new_command_line);
+
         m_terminal = widget;
       }
     else
@@ -83,7 +90,6 @@
     m_terminal->setObjectName ("OctaveTerminal");
     m_terminal->setFocusPolicy (Qt::StrongFocus);
 
-    setWindowIcon (QIcon (":/actions/icons/logo.png"));
     set_title (tr ("Command Window"));
 
     setWidget (m_terminal);
@@ -144,16 +150,13 @@
     emit settings_changed (settings);
   }
 
-  void terminal_dock_widget::interpreter_output (const QString& msg)
+  void terminal_dock_widget::init_command_prompt ()
   {
     if (m_experimental_terminal_widget)
-      emit interpreter_output_signal (msg);
+      {
+        command_widget *cmd = get_command_widget ();
+        if (cmd)
+          cmd->init_command_prompt ();
+      }
   }
-
-  void terminal_dock_widget::update_prompt (const QString& prompt)
-  {
-    if (m_experimental_terminal_widget)
-      emit update_prompt_signal (prompt);
-  }
-
 }
--- a/libgui/src/terminal-dock-widget.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libgui/src/terminal-dock-widget.h	Mon Aug 29 13:58:00 2022 +0200
@@ -49,6 +49,8 @@
 
     bool has_focus (void) const;
 
+    void init_command_prompt ();
+
     // FIXME: The next two functions could be eliminated (or combined)
     // if we had a common interface for the old and new terminal
     // widgets.
@@ -63,24 +65,21 @@
 
     void settings_changed (const gui_settings *settings);
 
-    // Note: UPDATE_PROMPT_SIGNAL and INTERPRETER_OUTPUT_SIGNAL are
+    // Note: the following four signals are
     // currently only used by the new experimental terminal widget.
 
     void update_prompt_signal (const QString&);
 
     void interpreter_output_signal (const QString&);
 
+    void new_command_line_signal (const QString& = QString ());
+
+    void execute_command_signal (const QString&);
+
   public slots:
 
     void notice_settings (const gui_settings *settings);
 
-    // Note: INTERPRETER_OUTPUT and UPDATE_PROMPT are currently only
-    // used by the new experimental terminal widget.
-
-    void interpreter_output (const QString&);
-
-    void update_prompt (const QString&);
-
   private:
 
     bool m_experimental_terminal_widget;
--- a/libgui/src/variable-editor.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libgui/src/variable-editor.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -51,6 +51,7 @@
 #include "builtin-defun-decls.h"
 #include "dw-main-window.h"
 #include "gui-preferences-cs.h"
+#include "gui-preferences-dw.h"
 #include "gui-preferences-global.h"
 #include "gui-preferences-sc.h"
 #include "gui-preferences-ve.h"
@@ -171,7 +172,8 @@
   {
     if (toplevel)
       {
-        m_dock_action->setIcon (QIcon (":/actions/icons/widget-dock.png"));
+        m_dock_action->setIcon (QIcon (global_icon_paths.at (ICON_THEME_OCTAVE)
+                                       + "widget-dock.png"));
         m_dock_action->setToolTip (tr ("Dock widget"));
 
         setWindowFlags (Qt::Window);
@@ -188,7 +190,8 @@
       }
     else
       {
-        m_dock_action->setIcon (QIcon (":/actions/icons/widget-undock.png"));
+        m_dock_action->setIcon (QIcon (global_icon_paths.at (ICON_THEME_OCTAVE)
+                                       + "widget-undock.png"));
         m_dock_action->setToolTip (tr ("Undock widget"));
 
         setFocus ();
@@ -1113,7 +1116,6 @@
   {
     set_title (tr ("Variable Editor"));
     setStatusTip (tr ("Edit variables."));
-    setWindowIcon (QIcon (":/actions/icons/logo.png"));
     setAttribute (Qt::WA_AlwaysShowToolTips);
 
     m_main->setParent (this);
--- a/libgui/src/welcome-wizard.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libgui/src/welcome-wizard.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -37,6 +37,7 @@
   #include <windows.h>
 #endif
 
+#include "gui-preferences-dw.h"
 #include "gui-preferences-nr.h"
 #include "octave-qobject.h"
 #include "welcome-wizard.h"
@@ -47,7 +48,7 @@
   make_octave_logo (QWidget *p = nullptr, int height = 100)
   {
     QLabel *logo = new QLabel (p);
-    QPixmap logo_pixmap (":/actions/icons/logo.png");
+    QPixmap logo_pixmap (dw_icon_set_names["NONE"]);
     logo->setPixmap (logo_pixmap.scaledToHeight (height));
     return logo;
   };
--- a/libgui/src/workspace-view.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libgui/src/workspace-view.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -55,7 +55,6 @@
       m_filter (new QComboBox (this)),
       m_filter_widget (new QWidget (this))
   {
-    setWindowIcon (QIcon (":/actions/icons/logo.png"));
     set_title (tr ("Workspace"));
     setStatusTip (tr ("View the variables in the active workspace."));
 
--- a/libinterp/corefcn/__eigs__.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/__eigs__.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -195,7 +195,7 @@
   SparseComplexMatrix ascm, bscm, bsct;
   int b_arg = 0;
   bool have_b = false;
-  bool have_a_fun = false;
+  bool have_a_fcn = false;
   bool a_is_complex = false;
   bool b_is_complex = false;
   bool symmetric = false;
@@ -234,7 +234,7 @@
 
       n = args(1).nint_value ();
       arg_offset = 1;
-      have_a_fun = true;
+      have_a_fcn = true;
     }
   else
     {
@@ -343,7 +343,7 @@
         }
 
       // isreal is ignored if A is not a function
-      if (have_a_fun)
+      if (have_a_fcn)
         {
           tmp = map.getfield ("isreal");
           if (tmp.is_defined ())
@@ -398,7 +398,7 @@
     error ("eigs: incorrect number of arguments");
 
   // Test undeclared (no issym) matrix inputs for symmetry
-  if (! sym_tested && ! have_a_fun)
+  if (! sym_tested && ! have_a_fcn)
     {
       if (a_is_complex)
         {
@@ -452,7 +452,7 @@
       ComplexMatrix eig_vec;
       ComplexColumnVector eig_val;
 
-      if (have_a_fun)
+      if (have_a_fcn)
         {
           if (b_is_sparse)
             nconv = EigsComplexNonSymmetricFunc
@@ -520,7 +520,7 @@
       ComplexMatrix eig_vec;
       ComplexColumnVector eig_val;
 
-      if (have_a_fun)
+      if (have_a_fcn)
         {
           if (b_is_sparse)
             nconv = EigsComplexNonSymmetricFunc
@@ -574,7 +574,7 @@
           Matrix eig_vec;
           ColumnVector eig_val;
 
-          if (have_a_fun)
+          if (have_a_fcn)
             {
               if (b_is_sparse)
                 nconv = EigsRealSymmetricFunc
@@ -624,7 +624,7 @@
           ComplexMatrix eig_vec;
           ComplexColumnVector eig_val;
 
-          if (have_a_fun)
+          if (have_a_fcn)
             {
               if (b_is_sparse)
                 nconv = EigsRealNonSymmetricFunc
--- a/libinterp/corefcn/__ftp__.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/__ftp__.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -82,7 +82,7 @@
 
 DEFMETHOD (__ftp_pwd__, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __ftp_pwd__ (@var{handle})
+@deftypefn {} {@var{pwd} =} __ftp_pwd__ (@var{handle})
 Undocumented internal function
 @end deftypefn */)
 {
@@ -122,7 +122,8 @@
 
 DEFMETHOD (__ftp_dir__, interp, args, nargout,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __ftp_dir__ (@var{handle})
+@deftypefn  {} {} __ftp_dir__ (@var{handle})
+@deftypefnx {} {@var{S} =} __ftp_dir__ (@var{handle})
 Undocumented internal function
 @end deftypefn */)
 {
@@ -248,7 +249,7 @@
 
 DEFMETHOD (__ftp_mode__, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __ftp_mode__ (@var{handle})
+@deftypefn {} {@var{mode} =} __ftp_mode__ (@var{handle})
 Undocumented internal function
 @end deftypefn */)
 {
@@ -345,7 +346,8 @@
 
 DEFMETHOD (__ftp_mput__, interp, args, nargout,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __ftp_mput__ (@var{handle}, @var{files})
+@deftypefn  {} {} __ftp_mput__ (@var{handle}, @var{files})
+@deftypefnx {} {@var{filelist} =} __ftp_mput__ (@var{handle}, @var{files})
 Undocumented internal function
 @end deftypefn */)
 {
--- a/libinterp/corefcn/__isprimelarge__.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/__isprimelarge__.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -98,7 +98,8 @@
 bool
 isprimescalar (uint64_t n)
 {
-  // Fast return for even numbers. n==2 is excluded by the time this function is called.
+  // Fast return for even numbers.
+  // n==2 is excluded by the time this function is called.
   if (! (n & 1))
     return false;
 
@@ -189,7 +190,10 @@
 %!assert (__isprimelarge__ (uint64 (2305843009213693951)), true)
 %!assert (__isprimelarge__ (uint64 (18446744073709551557)), true)
 
-%!assert (__isprimelarge__ ([uint64(12345), uint64(2147483647), uint64(2305843009213693951), uint64(18446744073709551557)]), logical ([0 1 1 1]))
+%!assert (__isprimelarge__ ([uint64(12345), uint64(2147483647), ...
+%!                           uint64(2305843009213693951), ...
+%!                           uint64(18446744073709551557)]),
+%!        logical ([0 1 1 1]))
 
 %!error <unable to convert input> (__isprimelarge__ ({'foo'; 'bar'}))
 */
--- a/libinterp/corefcn/__lin_interpn__.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/__lin_interpn__.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -35,6 +35,8 @@
 #include "error.h"
 #include "ovl.h"
 
+#include <type_traits>
+
 OCTAVE_NAMESPACE_BEGIN
 
 // equivalent to isvector.m
@@ -127,11 +129,11 @@
 
 // n-dimensional linear interpolation
 
-template <typename T>
+template <typename T, typename DT>
 void
 lin_interpn (int n, const octave_idx_type *size, const octave_idx_type *scale,
-             octave_idx_type Ni, T extrapval, const T **x,
-             const T *v, const T **y, T *vi)
+             octave_idx_type Ni, DT extrapval, const T **x,
+             const DT *v, const T **y, DT *vi)
 {
   bool out = false;
   int bit;
@@ -185,13 +187,17 @@
     }
 }
 
-template <typename T, typename M>
+template <typename MT, typename DMT, typename DT>
 octave_value
-lin_interpn (int n, M *X, const M V, M *Y)
+lin_interpn (int n, MT *X, const DMT V, MT *Y, DT extrapval)
 {
+  static_assert(std::is_same<DT, typename DMT::element_type>::value,
+                "Type DMT must be an ArrayType with elements of type DT.");
+  using T = typename MT::element_type;
+
   octave_value retval;
 
-  M Vi = M (Y[0].dims ());
+  DMT Vi = DMT (Y[0].dims ());
 
   OCTAVE_LOCAL_BUFFER (const T *, y, n);
   OCTAVE_LOCAL_BUFFER (octave_idx_type, size, n);
@@ -205,12 +211,10 @@
   OCTAVE_LOCAL_BUFFER (const T *, x, n);
   OCTAVE_LOCAL_BUFFER (octave_idx_type, scale, n);
 
-  const T *v = V.data ();
-  T *vi = Vi.fortran_vec ();
+  const DT *v = V.data ();
+  DT *vi = Vi.fortran_vec ();
   octave_idx_type Ni = Vi.numel ();
 
-  T extrapval = octave_NA;
-
   // offset in memory of each dimension
 
   scale[0] = 1;
@@ -228,7 +232,7 @@
           if (X[i].dims () != V.dims ())
             error ("interpn: incompatible size of argument number %d", i+1);
 
-          M tmp = M (dim_vector (size[i], 1));
+          MT tmp = MT (dim_vector (size[i], 1));
 
           for (octave_idx_type j = 0; j < size[i]; j++)
             tmp(j) = X[i](scale[i]*j);
@@ -284,8 +288,6 @@
       OCTAVE_LOCAL_BUFFER (FloatNDArray, X, n);
       OCTAVE_LOCAL_BUFFER (FloatNDArray, Y, n);
 
-      const FloatNDArray V = args(n).float_array_value ();
-
       for (int i = 0; i < n; i++)
         {
           X[i] = args(i).float_array_value ();
@@ -295,15 +297,24 @@
             error ("interpn: incompatible size of argument number %d", n+i+2);
         }
 
-      retval = lin_interpn<float, FloatNDArray> (n, X, V, Y);
+      if (args(n).iscomplex ())
+        {
+          const FloatComplexNDArray V = args(n).float_complex_array_value ();
+          FloatComplex extrapval (octave_NA, octave_NA);
+          retval = lin_interpn (n, X, V, Y, extrapval);
+        }
+      else
+        {
+          const FloatNDArray V = args(n).float_array_value ();
+          float extrapval = octave_NA;
+          retval = lin_interpn (n, X, V, Y, extrapval);
+        }
     }
   else
     {
       OCTAVE_LOCAL_BUFFER (NDArray, X, n);
       OCTAVE_LOCAL_BUFFER (NDArray, Y, n);
 
-      const NDArray V = args(n).array_value ();
-
       for (int i = 0; i < n; i++)
         {
           X[i] = args(i).array_value ();
@@ -313,15 +324,36 @@
             error ("interpn: incompatible size of argument number %d", n+i+2);
         }
 
-      retval = lin_interpn<double, NDArray> (n, X, V, Y);
+      if (args(n).iscomplex ())
+        {
+          const ComplexNDArray V = args(n).complex_array_value ();
+          Complex extrapval (octave_NA, octave_NA);
+          retval = lin_interpn (n, X, V, Y, extrapval);
+        }
+      else
+        {
+          const NDArray V = args(n).array_value ();
+          double extrapval = octave_NA;
+          retval = lin_interpn (n, X, V, Y, extrapval);
+        }
     }
 
   return retval;
 }
 
 /*
-## No test needed for internal helper function.
-%!assert (1)
+## Test that real and imaginary parts are interpolated the same way
+## and outer points are set to NA + 1i*NA
+%!test <*61907>
+%! x1 = 1:3;
+%! x2 = 1:4;
+%! v = repmat(1:4, 3, 1) + 1i * repmat((1:3)', 1, 4);
+%! [XI2, XI1] = meshgrid(1.5:3.5, 1.5:3.5);
+%! vi_complex = __lin_interpn__ (x1, x2, v, XI1, XI2);
+%! vi_real = __lin_interpn__ (x1, x2, real (v), XI1, XI2);
+%! vi_imag = __lin_interpn__ (x1, x2, imag (v), XI1, XI2);
+%! assert (real (vi_complex), vi_real);
+%! assert (imag (vi_complex), vi_imag);
 */
 
 OCTAVE_NAMESPACE_END
--- a/libinterp/corefcn/__magick_read__.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/__magick_read__.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -1677,7 +1677,7 @@
 // done in Octave language), and then again for the actual reading.
 DEFUN (__magick_ping__, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} __magick_ping__ (@var{fname}, @var{idx})
+@deftypefn {} {@var{fmt} =} __magick_ping__ (@var{fname}, @var{idx})
 Ping image information with GraphicsMagick or ImageMagick.
 
 This is a private internal function not intended for direct use.
@@ -1910,7 +1910,7 @@
 
 DEFUN (__magick_finfo__, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} __magick_finfo__ (@var{fname})
+@deftypefn {} {@var{infostruct} =} __magick_finfo__ (@var{fname})
 Read image information with GraphicsMagick or ImageMagick.
 
 This is a private internal function not intended for direct use.
@@ -2361,7 +2361,7 @@
 
 DEFUN (__magick_formats__, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} __magick_imformats__ (@var{formats})
+@deftypefn {} {@var{fmt_struct} =} __magick_imformats__ (@var{formats})
 Fill formats info with GraphicsMagick CoderInfo.
 
 @seealso{imfinfo, imformats, imread, imwrite}
--- a/libinterp/corefcn/__pchip_deriv__.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/__pchip_deriv__.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -43,7 +43,7 @@
 
 DEFUN (__pchip_deriv__, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} __pchip_deriv__ (@var{x}, @var{y}, @var{dim})
+@deftypefn {} {@var{d} =} __pchip_deriv__ (@var{x}, @var{y}, @var{dim})
 Undocumented internal function.
 @end deftypefn */)
 {
@@ -57,79 +57,167 @@
       if (args(0).is_single_type () || args(1).is_single_type ())
         {
           FloatColumnVector xvec (args(0).float_vector_value ());
-          FloatMatrix ymat (args(1).float_matrix_value ());
-
           F77_INT nx = to_f77_int (xvec.numel ());
-
           if (nx < 2)
             error ("__pchip_deriv__: X must be at least of length 2");
 
-          octave_idx_type nyr = ymat.rows ();
-          octave_idx_type nyc = ymat.columns ();
+          if (args(1).iscomplex ())
+            {
+              FloatComplexMatrix ymat (args(1).float_complex_matrix_value ());
+
+              octave_idx_type nyr = ymat.rows ();
+              octave_idx_type nyc = ymat.columns ();
 
-          if (nx != (rows ? nyc : nyr))
-            error ("__pchip_deriv__: X and Y dimension mismatch");
+              if (nx != (rows ? nyc : nyr))
+                error ("__pchip_deriv__: X and Y dimension mismatch");
+
+              FloatComplexMatrix dmat (nyr, nyc);
+
+              F77_INT ierr;
+              const F77_INT incfd = (rows ? to_f77_int (2*nyr) : 2);
+              volatile const octave_idx_type inc = (rows ? 2 : 2*nyr);
+              volatile octave_idx_type k = 0;
 
-          FloatMatrix dmat (nyr, nyc);
+              for (volatile octave_idx_type i = (rows ? nyr : nyc); i > 0; i--)
+                {
+                  F77_XFCN (pchim, PCHIM, (nx, xvec.data (),
+                                           reinterpret_cast<float const*>(ymat.data ()) + k * inc,
+                                           reinterpret_cast<float*>(dmat.fortran_vec ()) + k * inc,
+                                           incfd, ierr));
 
-          F77_INT ierr;
-          const F77_INT incfd = (rows ? to_f77_int (nyr) : 1);
-          volatile const octave_idx_type inc = (rows ? 1 : nyr);
-          volatile octave_idx_type k = 0;
+                  if (ierr < 0)
+                    error ("__pchip_deriv__: PCHIM failed for real part with ierr = %"
+                          OCTAVE_F77_INT_TYPE_FORMAT, ierr);
+
+                  F77_XFCN (pchim, PCHIM, (nx, xvec.data (),
+                                           reinterpret_cast<float const*>(ymat.data ()) + 1 + k * inc,
+                                           reinterpret_cast<float*>(dmat.fortran_vec ()) + 1 + k * inc,
+                                           incfd, ierr));
+
+                  if (ierr < 0)
+                    error ("__pchip_deriv__: PCHIM failed for imaginary part with ierr = %"
+                          OCTAVE_F77_INT_TYPE_FORMAT, ierr);
 
-          for (volatile octave_idx_type i = (rows ? nyr : nyc); i > 0; i--)
+                  k++;
+                }
+
+              retval = dmat;
+            }
+          else
             {
-              F77_XFCN (pchim, PCHIM, (nx, xvec.data (),
-                                       ymat.data () + k * inc,
-                                       dmat.fortran_vec () + k * inc,
-                                       incfd, ierr));
+              FloatMatrix ymat (args(1).float_matrix_value ());
+
+              octave_idx_type nyr = ymat.rows ();
+              octave_idx_type nyc = ymat.columns ();
+
+              if (nx != (rows ? nyc : nyr))
+                error ("__pchip_deriv__: X and Y dimension mismatch");
+
+              FloatMatrix dmat (nyr, nyc);
 
-              k++;
+              F77_INT ierr;
+              const F77_INT incfd = (rows ? to_f77_int (nyr) : 1);
+              volatile const octave_idx_type inc = (rows ? 1 : nyr);
+              volatile octave_idx_type k = 0;
 
-              if (ierr < 0)
-                error ("__pchip_deriv__: PCHIM failed with ierr = %"
-                       OCTAVE_F77_INT_TYPE_FORMAT, ierr);
+              for (volatile octave_idx_type i = (rows ? nyr : nyc); i > 0; i--)
+                {
+                  F77_XFCN (pchim, PCHIM, (nx, xvec.data (),
+                                           ymat.data () + k * inc,
+                                           dmat.fortran_vec () + k * inc,
+                                           incfd, ierr));
+
+                  k++;
+
+                  if (ierr < 0)
+                    error ("__pchip_deriv__: PCHIM failed with ierr = %"
+                          OCTAVE_F77_INT_TYPE_FORMAT, ierr);
+                }
+
+              retval = dmat;
             }
-
-          retval = dmat;
         }
       else
         {
           ColumnVector xvec (args(0).vector_value ());
-          Matrix ymat (args(1).matrix_value ());
-
           F77_INT nx = to_f77_int (xvec.numel ());
-
           if (nx < 2)
             error ("__pchip_deriv__: X must be at least of length 2");
 
-          octave_idx_type nyr = ymat.rows ();
-          octave_idx_type nyc = ymat.columns ();
+          if (args(1).iscomplex ())
+            {
+              ComplexMatrix ymat (args(1).complex_matrix_value ());
+
+              octave_idx_type nyr = ymat.rows ();
+              octave_idx_type nyc = ymat.columns ();
 
-          if (nx != (rows ? nyc : nyr))
-            error ("__pchip_deriv__: X and Y dimension mismatch");
+              if (nx != (rows ? nyc : nyr))
+                error ("__pchip_deriv__: X and Y dimension mismatch");
+
+              ComplexMatrix dmat (nyr, nyc);
+
+              F77_INT ierr;
+              const F77_INT incfd = (rows ? to_f77_int (2*nyr) : 2);
+              volatile const octave_idx_type inc = (rows ? 2 : 2*nyr);
+              volatile octave_idx_type k = 0;
 
-          Matrix dmat (nyr, nyc);
+              for (volatile octave_idx_type i = (rows ? nyr : nyc); i > 0; i--)
+                {
+                  F77_XFCN (dpchim, DPCHIM, (nx, xvec.data (),
+                                             reinterpret_cast<double const*>(ymat.data ()) + k * inc,
+                                             reinterpret_cast<double*>(dmat.fortran_vec ()) + k * inc,
+                                             incfd, ierr));
 
-          F77_INT ierr;
-          const F77_INT incfd = (rows ? to_f77_int (nyr) : 1);
-          volatile const octave_idx_type inc = (rows ? 1 : nyr);
-          volatile octave_idx_type k = 0;
+                  if (ierr < 0)
+                    error ("__pchip_deriv__: DPCHIM failed for real part with ierr = %"
+                          OCTAVE_F77_INT_TYPE_FORMAT, ierr);
+
+                  F77_XFCN (dpchim, DPCHIM, (nx, xvec.data (),
+                                             reinterpret_cast<double const*>(ymat.data ()) + 1 + k * inc,
+                                             reinterpret_cast<double*>(dmat.fortran_vec ()) + 1 + k * inc,
+                                             incfd, ierr));
+
+                  if (ierr < 0)
+                    error ("__pchip_deriv__: DPCHIM failed for imaginary part with ierr = %"
+                          OCTAVE_F77_INT_TYPE_FORMAT, ierr);
 
-          for (volatile octave_idx_type i = (rows ? nyr : nyc); i > 0; i--)
+                  k++;
+                }
+
+              retval = dmat;
+            }
+          else
             {
-              F77_XFCN (dpchim, DPCHIM, (nx, xvec.data (),
-                                         ymat.data () + k * inc,
-                                         dmat.fortran_vec () + k * inc,
-                                         incfd, ierr));
-              k++;
+              Matrix ymat (args(1).matrix_value ());
+
+              octave_idx_type nyr = ymat.rows ();
+              octave_idx_type nyc = ymat.columns ();
+
+              if (nx != (rows ? nyc : nyr))
+                error ("__pchip_deriv__: X and Y dimension mismatch");
+
+              Matrix dmat (nyr, nyc);
+
+              F77_INT ierr;
+              const F77_INT incfd = (rows ? to_f77_int (nyr) : 1);
+              volatile const octave_idx_type inc = (rows ? 1 : nyr);
+              volatile octave_idx_type k = 0;
 
-              if (ierr < 0)
-                error ("__pchip_deriv__: DPCHIM failed with ierr = %"
-                       OCTAVE_F77_INT_TYPE_FORMAT, ierr);
+              for (volatile octave_idx_type i = (rows ? nyr : nyc); i > 0; i--)
+                {
+                  F77_XFCN (dpchim, DPCHIM, (nx, xvec.data (),
+                                             ymat.data () + k * inc,
+                                             dmat.fortran_vec () + k * inc,
+                                             incfd, ierr));
+                  k++;
+
+                  if (ierr < 0)
+                    error ("__pchip_deriv__: DPCHIM failed with ierr = %"
+                          OCTAVE_F77_INT_TYPE_FORMAT, ierr);
+                }
+
+              retval = dmat;
             }
-
-          retval = dmat;
         }
     }
 
@@ -137,8 +225,37 @@
 }
 
 /*
-## No test needed for internal helper function.
-%!assert (1)
+%!shared x, y
+%! x = 0:3;
+%! y = x.^2 + 1i * x.^3;
+
+%!test
+%! d_complex = __pchip_deriv__ (x, y, 2);
+%! d_real = __pchip_deriv__ (x, real (y), 2);
+%! d_imag = __pchip_deriv__ (x, imag (y), 2);
+%! assert (real (d_complex), d_real);
+%! assert (imag (d_complex), d_imag);
+
+%!test
+%! d_complex = __pchip_deriv__ (x.', y.');
+%! d_real = __pchip_deriv__ (x.', real (y.'));
+%! d_imag = __pchip_deriv__ (x.', imag (y.'));
+%! assert (real (d_complex), d_real);
+%! assert (imag (d_complex), d_imag);
+
+%!test
+%! d_complex = __pchip_deriv__ (single (x), single (y), 2);
+%! d_real = __pchip_deriv__ (single (x), real (single (y)), 2);
+%! d_imag = __pchip_deriv__ (single (x), imag (single (y)), 2);
+%! assert (real (d_complex), d_real);
+%! assert (imag (d_complex), d_imag);
+
+%!test
+%! d_complex = __pchip_deriv__ (single (x'), single (y'));
+%! d_real = __pchip_deriv__ (single (x'), real (single (y')));
+%! d_imag = __pchip_deriv__ (single (x'), imag (single (y')));
+%! assert (real (d_complex), d_real);
+%! assert (imag (d_complex), d_imag);
 */
 
 OCTAVE_NAMESPACE_END
--- a/libinterp/corefcn/besselj.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/besselj.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -83,7 +83,7 @@
   while (0)
 
 octave_value_list
-do_bessel (enum bessel_type type, const char *fn,
+do_bessel (enum bessel_type type, const char *fcn,
            const octave_value_list& args, int nargout)
 {
   int nargin = args.length ();
@@ -112,7 +112,7 @@
         scaled = opt_arg.bool_value ();
 
       if (rpt_error)
-        error ("%s: OPT must be 0 (or false) or 1 (or true)", fn);
+        error ("%s: OPT must be 0 (or false) or 1 (or true)", fcn);
     }
 
   octave_value alpha_arg = args(0);
@@ -122,11 +122,11 @@
     {
       if (alpha_arg.is_scalar_type ())
         {
-          float alpha = args(0).xfloat_value ("%s: ALPHA must be a scalar or matrix", fn);
+          float alpha = args(0).xfloat_value ("%s: ALPHA must be a scalar or matrix", fcn);
 
           if (x_arg.is_scalar_type ())
             {
-              FloatComplex x = x_arg.xfloat_complex_value ("%s: X must be a scalar or matrix", fn);
+              FloatComplex x = x_arg.xfloat_complex_value ("%s: X must be a scalar or matrix", fcn);
 
               octave_idx_type ierr;
               octave_value result;
@@ -139,7 +139,7 @@
             }
           else
             {
-              FloatComplexNDArray x = x_arg.xfloat_complex_array_value ("%s: X must be a scalar or matrix", fn);
+              FloatComplexNDArray x = x_arg.xfloat_complex_array_value ("%s: X must be a scalar or matrix", fcn);
 
               Array<octave_idx_type> ierr;
               octave_value result;
@@ -161,10 +161,10 @@
 
           if (args0_is_row_vector && args1_is_col_vector)
             {
-              FloatRowVector ralpha = args(0).xfloat_row_vector_value ("%s: ALPHA must be a scalar or matrix", fn);
+              FloatRowVector ralpha = args(0).xfloat_row_vector_value ("%s: ALPHA must be a scalar or matrix", fcn);
 
               FloatComplexColumnVector cx
-                = x_arg.xfloat_complex_column_vector_value ("%s: X must be a scalar or matrix", fn);
+                = x_arg.xfloat_complex_column_vector_value ("%s: X must be a scalar or matrix", fcn);
 
               Array<octave_idx_type> ierr;
               octave_value result;
@@ -177,11 +177,11 @@
             }
           else
             {
-              FloatNDArray alpha = args(0).xfloat_array_value ("%s: ALPHA must be a scalar or matrix", fn);
+              FloatNDArray alpha = args(0).xfloat_array_value ("%s: ALPHA must be a scalar or matrix", fcn);
 
               if (x_arg.is_scalar_type ())
                 {
-                  FloatComplex x = x_arg.xfloat_complex_value ("%s: X must be a scalar or matrix", fn);
+                  FloatComplex x = x_arg.xfloat_complex_value ("%s: X must be a scalar or matrix", fcn);
 
                   Array<octave_idx_type> ierr;
                   octave_value result;
@@ -194,7 +194,7 @@
                 }
               else
                 {
-                  FloatComplexNDArray x = x_arg.xfloat_complex_array_value ("%s: X must be a scalar or matrix", fn);
+                  FloatComplexNDArray x = x_arg.xfloat_complex_array_value ("%s: X must be a scalar or matrix", fcn);
 
                   Array<octave_idx_type> ierr;
                   octave_value result;
@@ -212,11 +212,11 @@
     {
       if (alpha_arg.is_scalar_type ())
         {
-          double alpha = args(0).xdouble_value ("%s: ALPHA must be a scalar or matrix", fn);
+          double alpha = args(0).xdouble_value ("%s: ALPHA must be a scalar or matrix", fcn);
 
           if (x_arg.is_scalar_type ())
             {
-              Complex x = x_arg.xcomplex_value ("%s: X must be a scalar or matrix", fn);
+              Complex x = x_arg.xcomplex_value ("%s: X must be a scalar or matrix", fcn);
 
               octave_idx_type ierr;
               octave_value result;
@@ -229,7 +229,7 @@
             }
           else
             {
-              ComplexNDArray x = x_arg.xcomplex_array_value ("%s: X must be a scalar or matrix", fn);
+              ComplexNDArray x = x_arg.xcomplex_array_value ("%s: X must be a scalar or matrix", fcn);
 
               Array<octave_idx_type> ierr;
               octave_value result;
@@ -251,10 +251,10 @@
 
           if (args0_is_row_vector && args1_is_col_vector)
             {
-              RowVector ralpha = args(0).xrow_vector_value ("%s: ALPHA must be a scalar or matrix", fn);
+              RowVector ralpha = args(0).xrow_vector_value ("%s: ALPHA must be a scalar or matrix", fcn);
 
               ComplexColumnVector cx
-                = x_arg.xcomplex_column_vector_value ("%s: X must be a scalar or matrix", fn);
+                = x_arg.xcomplex_column_vector_value ("%s: X must be a scalar or matrix", fcn);
 
               Array<octave_idx_type> ierr;
               octave_value result;
@@ -267,11 +267,11 @@
             }
           else
             {
-              NDArray alpha = args(0).xarray_value ("%s: ALPHA must be a scalar or matrix", fn);
+              NDArray alpha = args(0).xarray_value ("%s: ALPHA must be a scalar or matrix", fcn);
 
               if (x_arg.is_scalar_type ())
                 {
-                  Complex x = x_arg.xcomplex_value ("%s: X must be a scalar or matrix", fn);
+                  Complex x = x_arg.xcomplex_value ("%s: X must be a scalar or matrix", fcn);
 
                   Array<octave_idx_type> ierr;
                   octave_value result;
@@ -284,7 +284,7 @@
                 }
               else
                 {
-                  ComplexNDArray x = x_arg.xcomplex_array_value ("%s: X must be a scalar or matrix", fn);
+                  ComplexNDArray x = x_arg.xcomplex_array_value ("%s: X must be a scalar or matrix", fcn);
 
                   Array<octave_idx_type> ierr;
                   octave_value result;
@@ -355,6 +355,10 @@
 
 /*
 %!# Function besselj is tested along with other bessels at the end of this file
+
+## besselj specific BIST
+%!assert <*48316> (! any (isnan (besselj (1, 10.^[5:12]))))
+
 */
 
 DEFUN (bessely, args, nargout,
@@ -466,6 +470,10 @@
 
 /*
 %!# Function besseli is tested along with other bessels at the end of this file
+
+## besseli specific BIST
+%!assert (! isinf (besseli (0, 700))) 
+
 */
 
 DEFUN (besselk, args, nargout,
@@ -616,12 +624,16 @@
 
 DEFUN (airy, args, nargout,
        doc: /* -*- texinfo -*-
-@deftypefn {} {[@var{a}, @var{ierr}] =} airy (@var{k}, @var{z}, @var{opt})
+@deftypefn  {} {@var{a} =} airy (@var{z})
+@deftypefnx {} {@var{a} =} airy (@var{k}, @var{z})
+@deftypefnx {} {@var{a} =} airy (@var{k}, @var{z}, @var{scale})
+@deftypefnx {} {[@var{a}, @var{ierr}] =} airy (@dots{})
+
 Compute Airy functions of the first and second kind, and their derivatives.
 
 @example
 @group
- K   Function   Scale factor (if "opt" is supplied)
+ K   Function   Scale factor (if @var{scale} is true)
 ---  --------   ---------------------------------------
  0   Ai (Z)     exp ((2/3) * Z * sqrt (Z))
  1   dAi(Z)/dZ  exp ((2/3) * Z * sqrt (Z))
@@ -633,9 +645,12 @@
 The function call @code{airy (@var{z})} is equivalent to
 @code{airy (0, @var{z})}.
 
-The result is the same size as @var{z}.
+The optional third input @var{scale} determines whether to
+apply scaling as described above. It is false by default.
 
-If requested, @var{ierr} contains the following status information and
+The result @var{a} is the same size as @var{z}.
+
+The optional output @var{ierr} contains the following status information and
 is the same size as the result.
 
 @enumerate 0
@@ -677,50 +692,91 @@
         error ("airy: K must be 0, 1, 2, or 3");
     }
 
-  bool scale = (nargin == 3);
+  bool scale = (nargin == 3) && args(2).xbool_value ("airy: scale option must be a logical value");
 
   int idx = (nargin == 1 ? 0 : 1);
 
+  Array<octave_idx_type> ierr;
+  octave_value result;
+
   if (args(idx).is_single_type ())
     {
       FloatComplexNDArray z = args(idx).xfloat_complex_array_value ("airy: Z must be a complex matrix");
 
-      Array<octave_idx_type> ierr;
-      octave_value result;
+      if (kind > 1)
+        result = math::biry (z, kind == 3, scale, ierr);
+      else
+        result = math::airy (z, kind == 1, scale, ierr);
+    }
+  else
+    {
+      ComplexNDArray z = args(idx).xcomplex_array_value ("airy: Z must be a complex matrix");
 
       if (kind > 1)
         result = math::biry (z, kind == 3, scale, ierr);
       else
         result = math::airy (z, kind == 1, scale, ierr);
-
-      retval(0) = result;
-      if (nargout > 1)
-        retval(1) = NDArray (ierr);
     }
-  else
-    {
-      ComplexNDArray z = args(idx).xcomplex_array_value ("airy: Z must be a complex matrix");
 
-      Array<octave_idx_type> ierr;
-      octave_value result;
-
-      if (kind > 1)
-        result = math::biry (z, kind == 3, scale, ierr);
-      else
-        result = math::airy (z, kind == 1, scale, ierr);
-
-      retval(0) = result;
-      if (nargout > 1)
-        retval(1) = NDArray (ierr);
-    }
+  retval(0) = result;
+  if (nargout > 1)
+    retval(1) = NDArray (ierr);
 
   return retval;
 }
 
 /*
-FIXME: Function airy does not yet have BIST tests
+%!test <*62321>
+%! assert (airy (0, +1, false),   0.1352924163128814,                       1e-15);
+%! assert (airy (0, -1, false),   0.5355608832923521,                       1e-15);
+%! assert (airy (0, +i, false),   0.3314933054321411 - 0.3174498589684437i, 1e-15);
+%! assert (airy (0, -i, false),   0.3314933054321411 + 0.3174498589684437i, 1e-15);
+%! assert (airy (0, +1,  true),   0.2635136447491401,                       1e-15);
+%! assert (airy (0, -1,  true),   0.4208904755499093 - 0.3311746779333462i, 1e-15);
+%! assert (airy (0, +i,  true),   0.2743053542644657 - 0.0825606941400591i, 1e-15);
+%! assert (airy (0, -i,  true),   0.2743053542644657 + 0.0825606941400591i, 1e-15);
+%! assert (airy (1, +1, false),  -0.1591474412967932,                       1e-15);
+%! assert (airy (1, -1, false),  -0.0101605671166451,                       1e-15);
+%! assert (airy (1, +i, false),  -0.4324926598418070 + 0.0980478562292432i, 1e-15);
+%! assert (airy (1, -i, false),  -0.4324926598418070 - 0.0980478562292432i, 1e-15);
+%! assert (airy (1, +1,  true),  -0.3099768889605148,                       1e-15);
+%! assert (airy (1, -1,  true),  -0.0079850602592406 + 0.0062829878869967i, 1e-15);
+%! assert (airy (1, +i,  true),  -0.2682792317254506 - 0.0680655016581369i, 1e-15);
+%! assert (airy (1, -i,  true),  -0.2682792317254506 + 0.0680655016581369i, 1e-15);
+%! assert (airy (2, +1, false),   1.2074235949528715,                       1e-15);
+%! assert (airy (2, -1, false),   0.1039973894969446,                       1e-15);
+%! assert (airy (2, +i, false),   0.6488582083303949 + 0.3449586347680484i, 1e-15);
+%! assert (airy (2, -i, false),   0.6488582083303949 - 0.3449586347680484i, 1e-15);
+%! assert (airy (2, +1,  true),   0.6199119435726786,                       1e-15);
+%! assert (airy (2, -1,  true),   0.1039973894969446,                       1e-15);
+%! assert (airy (2, +i,  true),   0.4049686654663902 + 0.2152973271658010i, 1e-15);
+%! assert (airy (2, -i,  true),   0.4049686654663902 - 0.2152973271658010i, 1e-15);
+%! assert (airy (3, +1, false),   0.9324359333927754,                       1e-15);
+%! assert (airy (3, -1, false),   0.5923756264227923,                       1e-15);
+%! assert (airy (3, +i, false),   0.1350266467108190 - 0.1288373867812549i, 1e-15);
+%! assert (airy (3, -i, false),   0.1350266467108190 + 0.1288373867812549i, 1e-15);
+%! assert (airy (3, +1,  true),   0.4787285706049846,                       1e-15);
+%! assert (airy (3, -1,  true),   0.5923756264227923,                       1e-15);
+%! assert (airy (3, +i,  true),   0.0842735134099415 - 0.0804106412111761i, 1e-15);
+%! assert (airy (3, -i,  true),   0.0842735134099415 + 0.0804106412111761i, 1e-15);
+%! z = -1 - 1e-6i;
+%! s1 = exp (2/3 * z * sqrt(z));
+%! s2 = exp (-abs (real (2/3 * z * sqrt(z))));
+%! assert (airy (0, z, true), s1 * airy (0, z, false), 1e-15);
+%! assert (airy (1, z, true), s1 * airy (1, z, false), 1e-15);
+%! assert (airy (2, z, true), s2 * airy (2, z, false), 1e-15);
+%! assert (airy (3, z, true), s2 * airy (3, z, false), 1e-15);
+
+Input validation tests
+%!error airy ()
+%!error airy (0, 1, 2, 3)
+%!error <K must be an integer value> airy ("foo", 2, false)
+%!error <K must be 0, 1, 2, or 3> airy (3743, 2, false)
+%!error <scale option must be a logical value> airy (0, 2, "foo")
+%!error <Z must be a complex matrix> airy (0, "foo", false)
 */
 
+
 /*
 ## Test values computed with GP/PARI version 2.3.3
 %!shared alpha, x, jx, yx, ix, kx, nix
--- a/libinterp/corefcn/bitfcns.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/bitfcns.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -361,7 +361,7 @@
 
 DEFUN (bitand, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} bitand (@var{x}, @var{y})
+@deftypefn {} {@var{z} =} bitand (@var{x}, @var{y})
 Return the bitwise AND of non-negative integers.
 
 @var{x}, @var{y} must be in the range [0,intmax]
@@ -377,7 +377,7 @@
 
 DEFUN (bitor, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} bitor (@var{x}, @var{y})
+@deftypefn {} {@var{z} =} bitor (@var{x}, @var{y})
 Return the bitwise OR of non-negative integers @var{x} and @var{y}.
 
 @seealso{bitor, bitxor, bitset, bitget, bitcmp, bitshift, intmax, flintmax}
@@ -392,7 +392,7 @@
 
 DEFUN (bitxor, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} bitxor (@var{x}, @var{y})
+@deftypefn {} {@var{z} =} bitxor (@var{x}, @var{y})
 Return the bitwise XOR of non-negative integers @var{x} and @var{y}.
 
 @seealso{bitand, bitor, bitset, bitget, bitcmp, bitshift, intmax, flintmax}
@@ -536,14 +536,13 @@
 
 DEFUN (bitshift, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} bitshift (@var{a}, @var{k})
-@deftypefnx {} {} bitshift (@var{a}, @var{k}, @var{n})
-Return a @var{k} bit shift of @var{n}-digit unsigned integers in @var{a}.
+@deftypefn  {} {@var{B} =} bitshift (@var{A}, @var{k})
+@deftypefnx {} {@var{B} =} bitshift (@var{A}, @var{k}, @var{n})
+Return a @var{k} bit shift of @var{n}-digit unsigned integers in @var{A}.
 
 A positive @var{k} leads to a left shift; A negative value to a right shift.
 
-If @var{n} is omitted it defaults to 64.
-@var{n} must be in the range [1,64].
+If @var{n} is omitted it defaults to 64.  @var{n} must be in the range [1,64].
 
 @example
 @group
@@ -658,10 +657,10 @@
 
 DEFUN (flintmax, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} flintmax ()
-@deftypefnx {} {} flintmax ("double")
-@deftypefnx {} {} flintmax ("single")
-@deftypefnx {} {} flintmax (@var{var})
+@deftypefn  {} {@var{Imax} =} flintmax ()
+@deftypefnx {} {@var{Imax} =} flintmax ("double")
+@deftypefnx {} {@var{Imax} =} flintmax ("single")
+@deftypefnx {} {@var{Imax} =} flintmax (@var{var})
 Return the largest integer that can be represented consecutively in a
 floating point value.
 
@@ -726,9 +725,9 @@
 
 DEFUN (intmax, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} intmax ()
-@deftypefnx {} {} intmax ("@var{type}")
-@deftypefnx {} {} intmax (@var{var})
+@deftypefn  {} {@var{Imax} =} intmax ()
+@deftypefnx {} {@var{Imax} =} intmax ("@var{type}")
+@deftypefnx {} {@var{Imax} =} intmax (@var{var})
 Return the largest integer that can be represented by a specific integer type.
 
 The input is either a string @qcode{"@var{type}"} specifying an integer type,
@@ -840,9 +839,9 @@
 
 DEFUN (intmin, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} intmin ()
-@deftypefnx {} {} intmin ("@var{type}")
-@deftypefnx {} {} intmin (@var{var})
+@deftypefn  {} {@var{Imin} =} intmin ()
+@deftypefnx {} {@var{Imin} =} intmin ("@var{type}")
+@deftypefnx {} {@var{Imin} =} intmin (@var{var})
 Return the smallest integer that can be represented by a specific integer type.
 
 The input is either a string @qcode{"@var{type}"} specifying an integer type,
@@ -954,13 +953,13 @@
 
 DEFUN (sizemax, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} sizemax ()
+@deftypefn {} {@var{max_numel} =} sizemax ()
 Return the largest value allowed for the size of an array.
 
 If Octave is compiled with 64-bit indexing, the result is of class int64,
-otherwise it is of class int32.  The maximum array size is slightly
-smaller than the maximum value allowable for the relevant class as reported
-by @code{intmax}.
+otherwise it is of class int32.  The maximum array size is slightly smaller
+than the maximum value allowable for the relevant class as reported by
+@code{intmax}.
 @seealso{intmax}
 @end deftypefn */)
 {
--- a/libinterp/corefcn/bsxfun.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/bsxfun.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -324,7 +324,7 @@
 
 DEFMETHOD (bsxfun, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} bsxfun (@var{f}, @var{A}, @var{B})
+@deftypefn {} {@var{C} =} bsxfun (@var{f}, @var{A}, @var{B})
 Apply a binary function @var{f} element-by-element to two array arguments
 @var{A} and @var{B}, expanding singleton dimensions in either input argument as
 necessary.
@@ -343,16 +343,16 @@
   if (args.length () != 3)
     print_usage ();
 
-  octave_value func = args(0);
-  if (func.is_string ())
+  octave_value fcn = args(0);
+  if (fcn.is_string ())
     {
-      std::string name = func.string_value ();
+      std::string name = fcn.string_value ();
 
       symbol_table& symtab = interp.get_symbol_table ();
 
-      func = symtab.find_function (name);
+      fcn = symtab.find_function (name);
 
-      if (func.is_undefined ())
+      if (fcn.is_undefined ())
         error ("bsxfun: invalid function name: %s", name.c_str ());
     }
   else if (! (args(0).is_function_handle () || args(0).is_inline_function ()))
@@ -363,14 +363,14 @@
   const octave_value A = args(1);
   const octave_value B = args(2);
 
-  if (func.is_builtin_function ()
-      || (func.is_function_handle () && ! A.isobject () && ! B.isobject ()))
+  if (fcn.is_builtin_function ()
+      || (fcn.is_function_handle () && ! A.isobject () && ! B.isobject ()))
     {
       // This may break if the default behavior is overridden.  But if you
       // override arithmetic operators for builtin classes, you should expect
       // mayhem anyway (constant folding etc).  Querying is_overloaded() may
       // not be exactly what we need here.
-      octave_function *fcn_val = func.function_value ();
+      octave_function *fcn_val = fcn.function_value ();
       if (fcn_val)
         {
           octave_value tmp = maybe_optimized_builtin (fcn_val->name (), A, B);
@@ -414,14 +414,14 @@
           octave_value_list inputs (2);
           inputs(0) = A;
           inputs(1) = B;
-          retval = feval (func, inputs, 1);
+          retval = feval (fcn, inputs, 1);
         }
       else if (dvc.numel () < 1)
         {
           octave_value_list inputs (2);
           inputs(0) = A.resize (dvc);
           inputs(1) = B.resize (dvc);
-          retval = feval (func, inputs, 1);
+          retval = feval (fcn, inputs, 1);
         }
       else
         {
@@ -463,7 +463,7 @@
               if (maybe_update_column (Bc, B, dvb, dvc, i, idxB))
                 inputs(1) = Bc;
 
-              octave_value_list tmp = feval (func, inputs, 1);
+              octave_value_list tmp = feval (fcn, inputs, 1);
 
 #define BSXINIT(T, CLS, EXTRACTOR)                                      \
               (result_type == CLS)                                      \
@@ -719,10 +719,12 @@
 %!assert (bsxfun (f, a, b), a - repmat (b, [4, 1, 1]))
 %!assert (bsxfun (f, a, c), a - repmat (c, [1, 4, 1]))
 %!assert (bsxfun (f, a, d), a - repmat (d, [1, 1, 4]))
-%!assert (bsxfun ("minus", ones ([4, 0, 4]), ones ([4, 1, 4])), zeros ([4, 0, 4]))
+%!assert (bsxfun ("minus", ones ([4, 0, 4]), ones ([4, 1, 4])),
+%!        zeros ([4, 0, 4]))
 
 ## The test below is a very hard case to treat
-%!assert (bsxfun (f, ones ([4, 1, 4, 1]), ones ([1, 4, 1, 4])), zeros ([4, 4, 4, 4]))
+%!assert (bsxfun (f, ones ([4, 1, 4, 1]), ones ([1, 4, 1, 4])),
+%!        zeros ([4, 4, 4, 4]))
 
 %!shared a, b, aa, bb
 %! ## FIXME: Set a known "good" random seed.  See bug #51779.
@@ -754,7 +756,7 @@
 ## Test automatic bsxfun
 %
 %!test
-%! funs = {@plus, @minus, @times, @rdivide, @ldivide, @power, @max, @min, ...
+%! fcns = {@plus, @minus, @times, @rdivide, @ldivide, @power, @max, @min, ...
 %!         @rem, @mod, @atan2, @hypot, @eq, @ne, @lt, @le, @gt, @ge, ...
 %!         @and, @or, @xor };
 %!
@@ -770,28 +772,28 @@
 %! x = rand (3) * 10-5;
 %! y = rand (3,1) * 10-5;
 %!
-%! for i=1:length (funs)
+%! for i=1:length (fcns)
 %!   for j = 1:length (float_types)
 %!     for k = 1:length (int_types)
 %!
-%!       fun = funs{i};
+%!       fcn = fcns{i};
 %!       f_type = float_types{j};
 %!       i_type = int_types{k};
 %!
-%!         assert (bsxfun (fun, f_type (x), i_type (y)), ...
-%!                 fun (f_type(x), i_type (y)));
-%!         assert (bsxfun (fun, f_type (y), i_type (x)), ...
-%!                 fun (f_type(y), i_type (x)));
+%!         assert (bsxfun (fcn, f_type (x), i_type (y)), ...
+%!                 fcn (f_type(x), i_type (y)));
+%!         assert (bsxfun (fcn, f_type (y), i_type (x)), ...
+%!                 fcn (f_type(y), i_type (x)));
 %!
-%!         assert (bsxfun (fun, i_type (x), i_type (y)), ...
-%!                 fun (i_type (x), i_type (y)));
-%!         assert (bsxfun (fun, i_type (y), i_type (x)), ...
-%!                 fun (i_type (y), i_type (x)));
+%!         assert (bsxfun (fcn, i_type (x), i_type (y)), ...
+%!                 fcn (i_type (x), i_type (y)));
+%!         assert (bsxfun (fcn, i_type (y), i_type (x)), ...
+%!                 fcn (i_type (y), i_type (x)));
 %!
-%!         assert (bsxfun (fun, f_type (x), f_type (y)), ...
-%!                 fun (f_type (x), f_type (y)));
-%!         assert (bsxfun (fun, f_type(y), f_type(x)), ...
-%!                 fun (f_type (y), f_type (x)));
+%!         assert (bsxfun (fcn, f_type (x), f_type (y)), ...
+%!                 fcn (f_type (x), f_type (y)));
+%!         assert (bsxfun (fcn, f_type(y), f_type(x)), ...
+%!                 fcn (f_type (y), f_type (x)));
 %!     endfor
 %!   endfor
 %! endfor
@@ -813,6 +815,33 @@
 %! r = bsxfun (@times, im, mask);
 %! assert (r(:,:,1), repmat (single ([0, 0, 1+i, 1+i]), [4, 1]));
 
+## automatic broadcasting with inplace times operator
+%!test <38466>
+%! a = ones (2, 2, 2);
+%! b = 2 * ones (2, 1);
+%! a .*= b;
+%! assert (a, 2 * ones (2, 2, 2));
+
+%!test <38466>
+%! a = ones (2, 2, 2);
+%! b = 2 * ones (1, 2);
+%! a .*= b;
+%! assert (a, 2 * ones (2, 2, 2));
+
+%!test <38466>
+%! a = ones (2, 2, 2);
+%! b = 2 * ones (2, 2);
+%! a .*= b;
+%! assert (a, 2 * ones (2, 2, 2));
+
+%!test
+%! a = ones (2, 2, 2);
+%! b = 2 * ones (1, 1, 2);
+%! a .*= b;
+%! assert (a, 2 * ones (2, 2, 2));
+
+%!assert (ones (2,2,2) .* ones (1,2), ones (2,2,2));
+
 */
 
 OCTAVE_NAMESPACE_END
--- a/libinterp/corefcn/call-stack.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/call-stack.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -1138,7 +1138,7 @@
            doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} max_stack_depth ()
 @deftypefnx {} {@var{old_val} =} max_stack_depth (@var{new_val})
-@deftypefnx {} {} max_stack_depth (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} max_stack_depth (@var{new_val}, "local")
 Query or set the internal limit on the number of times a function may
 be called recursively.
 
@@ -1174,7 +1174,7 @@
 @deftypefn  {} {} who
 @deftypefnx {} {} who pattern @dots{}
 @deftypefnx {} {} who option pattern @dots{}
-@deftypefnx {} {C =} who ("pattern", @dots{})
+@deftypefnx {} {C =} who (@dots{})
 List currently defined variables matching the given patterns.
 
 Valid pattern syntax is the same as described for the @code{clear} command.
--- a/libinterp/corefcn/cellfun.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/cellfun.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -71,7 +71,7 @@
 get_output_list (error_system& es,
                  octave_idx_type count, octave_idx_type nargout,
                  const octave_value_list& inputlist,
-                 octave_value& func,
+                 octave_value& fcn,
                  octave_value& error_handler)
 {
   octave_value_list tmp;
@@ -80,14 +80,13 @@
 
   try
     {
-      tmp = feval (func, inputlist, nargout);
+      tmp = feval (fcn, inputlist, nargout);
     }
   catch (const execution_exception& ee)
     {
       if (error_handler.is_defined ())
         {
-          interpreter& interp
-            = __get_interpreter__ ("get_output_list");
+          interpreter& interp = __get_interpreter__ ();
 
           es.save_exception (ee);
           interp.recover_from_exception ();
@@ -270,20 +269,21 @@
 
 DEFMETHOD (cellfun, interp, args, nargout,
            doc: /* -*- texinfo -*-
-@deftypefn  {} {} cellfun (@var{name}, @var{C})
-@deftypefnx {} {} cellfun ("size", @var{C}, @var{k})
-@deftypefnx {} {} cellfun ("isclass", @var{C}, @var{class})
-@deftypefnx {} {} cellfun (@var{func}, @var{C})
-@deftypefnx {} {} cellfun (@var{func}, @var{C}, @var{D})
-@deftypefnx {} {[@var{a}, @dots{}] =} cellfun (@dots{})
-@deftypefnx {} {} cellfun (@dots{}, "ErrorHandler", @var{errfunc})
-@deftypefnx {} {} cellfun (@dots{}, "UniformOutput", @var{val})
+@deftypefn  {} {@var{A} =} cellfun ("@var{fcn}", @var{C})
+@deftypefnx {} {@var{A} =} cellfun ("size", @var{C}, @var{k})
+@deftypefnx {} {@var{A} =} cellfun ("isclass", @var{C}, @var{class})
+@deftypefnx {} {@var{A} =} cellfun (@@@var{fcn}, @var{C})
+@deftypefnx {} {@var{A} =} cellfun (@var{fcn}, @var{C})
+@deftypefnx {} {@var{A} =} cellfun (@var{fcn}, @var{C1}, @var{C2}, @dots{})
+@deftypefnx {} {[@var{A1}, @var{A2}, @dots{}] =} cellfun (@dots{})
+@deftypefnx {} {@var{A} =} cellfun (@dots{}, "ErrorHandler", @var{errfcn})
+@deftypefnx {} {@var{A} =} cellfun (@dots{}, "UniformOutput", @var{val})
 
-Evaluate the function named @var{name} on the elements of the cell array
+Evaluate the function named "@var{fcn}" on the elements of the cell array
 @var{C}.
 
 Elements in @var{C} are passed on to the named function individually.  The
-function @var{name} can be one of the functions
+function @var{fcn} can be one of the functions
 
 @table @code
 @item isempty
@@ -316,11 +316,10 @@
 Return 1 for elements of @var{class}.
 @end table
 
-Additionally, @code{cellfun} accepts an arbitrary function @var{func}
-in the form of an inline function, function handle, or the name of a
-function (in a character string).  The function can take one or more
-arguments, with the inputs arguments given by @var{C}, @var{D}, etc.
-Equally the function can return one or more output arguments.  For example:
+Additionally, @code{cellfun} accepts an arbitrary function @var{fcn} in the
+form of an inline function, function handle, or the name of a function (in a
+character string).  The function can take one or more arguments, with the
+inputs arguments given by @var{C1}, @var{C2}, etc.  For example:
 
 @example
 @group
@@ -329,9 +328,10 @@
 @end group
 @end example
 
-The number of output arguments of @code{cellfun} matches the number of
-output arguments of the function.  The outputs of the function will be
-collected into the output arguments of @code{cellfun} like this:
+The number of output arguments of @code{cellfun} matches the number of output
+arguments of the function and can be greater than one.  When there are multiple
+outputs of the function they will be collected into the output arguments of
+@code{cellfun} like this:
 
 @example
 @group
@@ -348,14 +348,14 @@
 @end group
 @end example
 
-Note that per default the output argument(s) are arrays of the same size as
+Note that, per default, the output argument(s) are arrays of the same size as
 the input arguments.  Input arguments that are singleton (1x1) cells will be
 automatically expanded to the size of the other arguments.
 
-If the parameter @qcode{"UniformOutput"} is set to true (the default),
-then the function must return scalars which will be concatenated into the
-return array(s).  If @qcode{"UniformOutput"} is false, the outputs are
-concatenated into a cell array (or cell arrays).  For example:
+If the parameter @qcode{"UniformOutput"} is set to true (the default), then the
+function must return scalars which will be concatenated into the return
+array(s).  If @qcode{"UniformOutput"} is false, the outputs are concatenated
+into a cell array (or cell arrays).  For example:
 
 @example
 @group
@@ -365,17 +365,17 @@
 @end group
 @end example
 
-Given the parameter @qcode{"ErrorHandler"}, then @var{errfunc} defines a
-function to call in case @var{func} generates an error.  The form of the
+Given the parameter @qcode{"ErrorHandler"}, then @var{errfcn} defines a
+function to call in case @var{fcn} generates an error.  The form of the
 function is
 
 @example
-function [@dots{}] = errfunc (@var{s}, @dots{})
+function [@dots{}] = errfcn (@var{s}, @dots{})
 @end example
 
 @noindent
-where there is an additional input argument to @var{errfunc} relative to
-@var{func}, given by @var{s}.  This is a structure with the elements
+where there is an additional input argument to @var{errfcn} relative to
+@var{fcn}, given by @var{s}.  This is a structure with the elements
 @qcode{"identifier"}, @qcode{"message"}, and @qcode{"index"} giving
 respectively the error identifier, the error message, and the index into the
 input arguments of the element that caused the error.  For example:
@@ -388,18 +388,18 @@
 @end group
 @end example
 
-Use @code{cellfun} intelligently.  The @code{cellfun} function is a
-useful tool for avoiding loops.  It is often used with anonymous
-function handles; however, calling an anonymous function involves an
-overhead quite comparable to the overhead of an m-file function.
-Passing a handle to a built-in function is faster, because the
-interpreter is not involved in the internal loop.  For example:
+Use @code{cellfun} intelligently.  The @code{cellfun} function is a useful tool
+for avoiding loops.  It is often used with anonymous function handles; however,
+calling an anonymous function involves an overhead quite comparable to the
+overhead of an m-file function.  Passing a handle to a built-in function is
+faster, because the interpreter is not involved in the internal loop.  For
+example:
 
 @example
 @group
-a = @{@dots{}@}
-v = cellfun (@@(x) det (x), a); # compute determinants
-v = cellfun (@@det, a); # faster
+C = @{@dots{}@}
+v = cellfun (@@(x) det (x), C); # compute determinants
+v = cellfun (@@det, C);         # 40% faster
 @end group
 @end example
 
@@ -417,11 +417,11 @@
   octave_value_list retval;
   int nargout1 = (nargout < 1 ? 1 : nargout);
 
-  octave_value func = args(0);
+  octave_value fcn = args(0);
 
   symbol_table& symtab = interp.get_symbol_table ();
 
-  if (func.is_string ())
+  if (fcn.is_string ())
     {
       retval = try_cellfun_internal_ops<boolNDArray, NDArray> (args, nargin);
 
@@ -433,18 +433,18 @@
       std::string name = args(0).string_value ();
 
       if (! valid_identifier (name))
-        func = get_function_handle (interp, args(0), "x");
+        fcn = get_function_handle (interp, args(0), "x");
       else
         {
-          func = symtab.find_function (name);
+          fcn = symtab.find_function (name);
 
-          if (func.is_undefined ())
+          if (fcn.is_undefined ())
             error ("cellfun: invalid function NAME: %s", name.c_str ());
         }
     }
 
-  if (! func.is_function_handle () && ! func.is_inline_function ()
-      && ! func.is_function ())
+  if (! fcn.is_function_handle () && ! fcn.is_inline_function ()
+      && ! fcn.is_function ())
     error ("cellfun: argument NAME must be a string or function handle");
 
   bool uniform_output = true;
@@ -456,7 +456,7 @@
   // more specific function class, so this can result in fewer polymorphic
   // function calls as the function gets called for each value of the array.
   {
-    if (func.is_function_handle () || func.is_inline_function ())
+    if (fcn.is_function_handle () || fcn.is_inline_function ())
       {
         // FIXME: instead of checking for overloaded functions as we did
         // previously but is no longer possible, we could check whether
@@ -466,7 +466,7 @@
         goto nevermind;
       }
 
-    std::string name = func.function_value () -> name ();
+    std::string name = fcn.function_value () -> name ();
     octave_value f = symtab.find_function (name);
 
     if (f.is_defined ())
@@ -489,7 +489,7 @@
 
         // Okay, we tried, doesn't work, let's do the best we can instead
         // and avoid polymorphic calls for each element of the array.
-        func = f;
+        fcn = f;
       }
   }
 
@@ -559,7 +559,7 @@
             }
 
           const octave_value_list tmp
-            = get_output_list (es, count, nargout, inputlist, func,
+            = get_output_list (es, count, nargout, inputlist, fcn,
                                error_handler);
 
           int tmp_numel = tmp.length ();
@@ -645,7 +645,7 @@
             }
 
           const octave_value_list tmp
-            = get_output_list (es, count, nargout, inputlist, func,
+            = get_output_list (es, count, nargout, inputlist, fcn,
                                error_handler);
 
           if (nargout > 0 && tmp.length () < nargout)
@@ -859,19 +859,27 @@
 %! A = cellfun (@(x,y) cell2str (x,y), {1.1, 4}, {3.1, 6}, ...
 %!              "ErrorHandler", @__cellfunerror);
 %! B = isfield (A(1), "message") && isfield (A(1), "index");
-%! assert ([(isfield (A(1), "identifier")), (isfield (A(2), "identifier"))], [true, true]);
-%! assert ([(isfield (A(1), "message")), (isfield (A(2), "message"))], [true, true]);
-%! assert ([(isfield (A(1), "index")), (isfield (A(2), "index"))], [true, true]);
-%! assert ([(isempty (A(1).message)), (isempty (A(2).message))], [false, false]);
+%! assert ([(isfield (A(1), "identifier")), (isfield (A(2), "identifier"))],
+%!         [true, true]);
+%! assert ([(isfield (A(1), "message")), (isfield (A(2), "message"))],
+%!         [true, true]);
+%! assert ([(isfield (A(1), "index")), (isfield (A(2), "index"))],
+%!         [true, true]);
+%! assert ([(isempty (A(1).message)), (isempty (A(2).message))],
+%!         [false, false]);
 %! assert ([A(1).index, A(2).index], [1, 2]);
 %!test  # Overwriting setting of "UniformOutput" true
 %! A = cellfun (@(x,y) cell2str (x,y), {1.1, 4}, {3.1, 6}, ...
 %!              "UniformOutput", true, "ErrorHandler", @__cellfunerror);
 %! B = isfield (A(1), "message") && isfield (A(1), "index");
-%! assert ([(isfield (A(1), "identifier")), (isfield (A(2), "identifier"))], [true, true]);
-%! assert ([(isfield (A(1), "message")), (isfield (A(2), "message"))], [true, true]);
-%! assert ([(isfield (A(1), "index")), (isfield (A(2), "index"))], [true, true]);
-%! assert ([(isempty (A(1).message)), (isempty (A(2).message))], [false, false]);
+%! assert ([(isfield (A(1), "identifier")), (isfield (A(2), "identifier"))],
+%!         [true, true]);
+%! assert ([(isfield (A(1), "message")), (isfield (A(2), "message"))],
+%!         [true, true]);
+%! assert ([(isfield (A(1), "index")), (isfield (A(2), "index"))],
+%!         [true, true]);
+%! assert ([(isempty (A(1).message)), (isempty (A(2).message))],
+%!         [false, false]);
 %! assert ([A(1).index, A(2).index], [1, 2]);
 
 ## Input arguments can be of type cell arrays of character or strings
@@ -886,18 +894,26 @@
 %!test
 %! A = cellfun (@(x,y) cell2str (x,y), {"a", "d"}, {"c", "f"}, ...
 %!              "ErrorHandler", @__cellfunerror);
-%! assert ([(isfield (A(1), "identifier")), (isfield (A(2), "identifier"))], [true, true]);
-%! assert ([(isfield (A(1), "message")), (isfield (A(2), "message"))], [true, true]);
-%! assert ([(isfield (A(1), "index")), (isfield (A(2), "index"))], [true, true]);
-%! assert ([(isempty (A(1).message)), (isempty (A(2).message))], [false, false]);
+%! assert ([(isfield (A(1), "identifier")), (isfield (A(2), "identifier"))],
+%!         [true, true]);
+%! assert ([(isfield (A(1), "message")), (isfield (A(2), "message"))],
+%!         [true, true]);
+%! assert ([(isfield (A(1), "index")), (isfield (A(2), "index"))],
+%!         [true, true]);
+%! assert ([(isempty (A(1).message)), (isempty (A(2).message))],
+%!         [false, false]);
 %! assert ([A(1).index, A(2).index], [1, 2]);
 %!test  # Overwriting setting of "UniformOutput" true
 %! A = cellfun (@(x,y) cell2str (x,y), {"a", "d"}, {"c", "f"}, ...
 %!              "UniformOutput", true, "ErrorHandler", @__cellfunerror);
-%! assert ([(isfield (A(1), "identifier")), (isfield (A(2), "identifier"))], [true, true]);
-%! assert ([(isfield (A(1), "message")), (isfield (A(2), "message"))], [true, true]);
-%! assert ([(isfield (A(1), "index")), (isfield (A(2), "index"))], [true, true]);
-%! assert ([(isempty (A(1).message)), (isempty (A(2).message))], [false, false]);
+%! assert ([(isfield (A(1), "identifier")), (isfield (A(2), "identifier"))],
+%!         [true, true]);
+%! assert ([(isfield (A(1), "message")), (isfield (A(2), "message"))],
+%!         [true, true]);
+%! assert ([(isfield (A(1), "index")), (isfield (A(2), "index"))],
+%!         [true, true]);
+%! assert ([(isempty (A(1).message)), (isempty (A(2).message))],
+%!         [false, false]);
 %! assert ([A(1).index, A(2).index], [1, 2]);
 
 ## Structures cannot be handled by cellfun
@@ -920,18 +936,26 @@
 %!test
 %! A = cellfun (@(x,y) mat2str (x,y), {{1.1}, {4.2}}, {{3.1}, {2}}, ...
 %!              "ErrorHandler", @__cellfunerror);
-%! assert ([(isfield (A(1), "identifier")), (isfield (A(2), "identifier"))], [true, true]);
-%! assert ([(isfield (A(1), "message")), (isfield (A(2), "message"))], [true, true]);
-%! assert ([(isfield (A(1), "index")), (isfield (A(2), "index"))], [true, true]);
-%! assert ([(isempty (A(1).message)), (isempty (A(2).message))], [false, false]);
+%! assert ([(isfield (A(1), "identifier")), (isfield (A(2), "identifier"))],
+%!         [true, true]);
+%! assert ([(isfield (A(1), "message")), (isfield (A(2), "message"))],
+%!         [true, true]);
+%! assert ([(isfield (A(1), "index")), (isfield (A(2), "index"))],
+%!         [true, true]);
+%! assert ([(isempty (A(1).message)), (isempty (A(2).message))],
+%!         [false, false]);
 %! assert ([A(1).index, A(2).index], [1, 2]);
 %!test  # Overwriting setting of "UniformOutput" true
 %! A = cellfun (@(x,y) mat2str (x,y), {{1.1}, {4.2}}, {{3.1}, {2}}, ...
 %!              "UniformOutput", true, "ErrorHandler", @__cellfunerror);
-%! assert ([(isfield (A(1), "identifier")), (isfield (A(2), "identifier"))], [true, true]);
-%! assert ([(isfield (A(1), "message")), (isfield (A(2), "message"))], [true, true]);
-%! assert ([(isfield (A(1), "index")), (isfield (A(2), "index"))], [true, true]);
-%! assert ([(isempty (A(1).message)), (isempty (A(2).message))], [false, false]);
+%! assert ([(isfield (A(1), "identifier")), (isfield (A(2), "identifier"))],
+%!         [true, true]);
+%! assert ([(isfield (A(1), "message")), (isfield (A(2), "message"))],
+%!         [true, true]);
+%! assert ([(isfield (A(1), "index")), (isfield (A(2), "index"))],
+%!         [true, true]);
+%! assert ([(isempty (A(1).message)), (isempty (A(2).message))],
+%!         [false, false]);
 %! assert ([A(1).index, A(2).index], [1, 2]);
 
 ## Input arguments can be of type cell array of structure arrays
@@ -984,7 +1008,8 @@
 %!assert (cellfun ("size", {zeros([1,2,3]),1}, 2), [2,1])
 %!assert (cellfun ("size", {zeros([1,2,3]),1}, 3), [3,1])
 %!assert (cellfun (@atan2, {1,1}, {1,2}), [atan2(1,1), atan2(1,2)])
-%!assert (cellfun (@atan2, {1,1}, {1,2},"UniformOutput", false), {atan2(1,1), atan2(1,2)})
+%!assert (cellfun (@atan2, {1,1}, {1,2},"UniformOutput", false),
+%!        {atan2(1,1), atan2(1,2)})
 %!assert (cellfun (@sin, {1,2;3,4}), sin ([1,2;3,4]))
 %!assert (cellfun (@atan2, {1,1;1,1}, {1,2;1,2}), atan2 ([1,1;1,1],[1,2;1,2]))
 %!error cellfun (@factorial, {-1,3})
@@ -997,9 +1022,12 @@
 %! assert (c, {".d", ".h"});
 
 %!assert <*40467> (cellfun (@isreal, {1 inf nan []}), [true, true, true, true])
-%!assert <*40467> (cellfun (@isreal, {1 inf nan []}, "UniformOutput", false), {true, true, true, true})
-%!assert <*40467> (cellfun (@iscomplex, {1 inf nan []}), [false, false, false, false])
-%!assert <*40467> (cellfun (@iscomplex, {1 inf nan []}, "UniformOutput", false), {false, false, false, false})
+%!assert <*40467> (cellfun (@isreal, {1 inf nan []}, "UniformOutput", false),
+%!                 {true, true, true, true})
+%!assert <*40467> (cellfun (@iscomplex, {1 inf nan []}),
+%!                 [false, false, false, false])
+%!assert <*40467> (cellfun (@iscomplex, {1 inf nan []}, "UniformOutput", false),
+%!                 {false, false, false, false})
 
 %!error cellfun (1)
 %!error cellfun ("isclass", 1)
@@ -1015,7 +1043,8 @@
 %!endfunction
 %!test <*58411>
 %! global __errmsg;
-%! assert (cellfun (@factorial, {1, 2, -3}, "ErrorHandler", @__errfcn), [1, 2, NaN]);
+%! assert (cellfun (@factorial, {1, 2, -3}, "ErrorHandler", @__errfcn),
+%!         [1, 2, NaN]);
 %! assert (! isempty (__errmsg));
 %! clear -global __errmsg;
 */
@@ -1026,31 +1055,38 @@
 
 DEFMETHOD (arrayfun, interp, args, nargout,
            doc: /* -*- texinfo -*-
-@deftypefn  {} {} arrayfun (@var{func}, @var{A})
-@deftypefnx {} {@var{x} =} arrayfun (@var{func}, @var{A})
-@deftypefnx {} {@var{x} =} arrayfun (@var{func}, @var{A}, @var{b}, @dots{})
-@deftypefnx {} {[@var{x}, @var{y}, @dots{}] =} arrayfun (@var{func}, @var{A}, @dots{})
-@deftypefnx {} {} arrayfun (@dots{}, "UniformOutput", @var{val})
-@deftypefnx {} {} arrayfun (@dots{}, "ErrorHandler", @var{errfunc})
+@deftypefn  {} {@var{B} =} arrayfun (@var{fcn}, @var{A})
+@deftypefnx {} {@var{B} =} arrayfun (@var{fcn}, @var{A1}, @var{A2}, @dots{})
+@deftypefnx {} {[@var{B1}, @var{B2}, @dots{}] =} arrayfun (@var{fcn}, @var{A}, @dots{})
+@deftypefnx {} {@var{B} =} arrayfun (@dots{}, "UniformOutput", @var{val})
+@deftypefnx {} {@var{B} =} arrayfun (@dots{}, "ErrorHandler", @var{errfcn})
 
 Execute a function on each element of an array.
 
 This is useful for functions that do not accept array arguments.  If the
-function does accept array arguments it is better to call the function
+function does accept array arguments it is @emph{better} to call the function
 directly.
 
-The first input argument @var{func} can be a string, a function
-handle, an inline function, or an anonymous function.  The input
-argument @var{A} can be a logic array, a numeric array, a string
-array, a structure array, or a cell array.  By a call of the function
-@code{arrayfun} all elements of @var{A} are passed on to the named
-function @var{func} individually.
+The first input argument @var{fcn} can be a string, a function handle, an
+inline function, or an anonymous function.  The input argument @var{A} can be a
+logical array, a numeric array, a string array, a structure array, or a cell
+array.  @code{arrayfun} passes all elements of @var{A} individually to the
+function @var{fcn} and collects the results.  The equivalent pseudo-code is
 
-The named function can also take more than two input arguments, with
-the input arguments given as third input argument @var{b}, fourth
-input argument @var{c}, @dots{}  If given more than one array input
-argument then all input arguments must have the same sizes, for
-example:
+@example
+@group
+cls = class (@var{fcn} (@var{A}(1));
+@var{B} = zeros (size (@var{A}), cls);
+for i = 1:numel (@var{A})
+  @var{B}(i) = @var{fcn} (@var{A}(i))
+endfor
+@end group
+@end example
+
+The named function can also take more than two input arguments, with the input
+arguments given as third input argument @var{A2}, fourth input argument
+@var{A2}, @dots{}  If given more than one array input argument then all input
+arguments must have the same sizes.  For example:
 
 @example
 @group
@@ -1061,10 +1097,10 @@
 
 If the parameter @var{val} after a further string input argument
 @qcode{"UniformOutput"} is set @code{true} (the default), then the named
-function @var{func} must return a single element which then will be
-concatenated into the return value and is of type matrix.  Otherwise,
-if that parameter is set to @code{false}, then the outputs are
-concatenated in a cell array.  For example:
+function @var{fcn} must return a single element which then will be concatenated
+into the return value and is of type matrix.  Otherwise, if that parameter is
+set to @code{false}, then the outputs are concatenated in a cell array.  For
+example:
 
 @example
 @group
@@ -1078,9 +1114,8 @@
 @end group
 @end example
 
-If more than one output arguments are given then the named function
-must return the number of return values that also are expected, for
-example:
+If more than one output arguments are given then the named function must return
+the number of return values that also are expected, for example:
 
 @example
 @group
@@ -1104,25 +1139,24 @@
 @end group
 @end example
 
-If the parameter @var{errfunc} after a further string input argument
+If the parameter @var{errfcn} after a further string input argument
 @qcode{"ErrorHandler"} is another string, a function handle, an inline
-function, or an anonymous function, then @var{errfunc} defines a
-function to call in the case that @var{func} generates an error.
-The definition of the function must be of the form
+function, or an anonymous function, then @var{errfcn} defines a function to
+call in the case that @var{fcn} generates an error.  The definition of the
+function must be of the form
 
 @example
-function [@dots{}] = errfunc (@var{s}, @dots{})
+function [@dots{}] = errfcn (@var{s}, @dots{})
 @end example
 
 @noindent
-where there is an additional input argument to @var{errfunc}
-relative to @var{func}, given by @var{s}.  This is a structure with
-the elements @qcode{"identifier"}, @qcode{"message"}, and
-@qcode{"index"} giving, respectively, the error identifier, the error
-message, and the index of the array elements that caused the error.  The
-size of the output argument of @var{errfunc} must have the same size as the
-output argument of @var{func}, otherwise a real error is thrown.  For
-example:
+where there is an additional input argument to @var{errfcn} relative to
+@var{fcn}, given by @var{s}.  This is a structure with the elements
+@qcode{"identifier"}, @qcode{"message"}, and @qcode{"index"} giving,
+respectively, the error identifier, the error message, and the index of the
+array elements that caused the error.  The size of the output argument of
+@var{errfcn} must have the same size as the output argument of @var{fcn},
+otherwise a real error is thrown.  For example:
 
 @example
 @group
@@ -1147,22 +1181,22 @@
   octave_value_list retval;
   int nargout1 = (nargout < 1 ? 1 : nargout);
   bool symbol_table_lookup = false;
-  octave_value func = args(0);
+  octave_value fcn = args(0);
 
   symbol_table& symtab = interp.get_symbol_table ();
 
-  if (func.is_string ())
+  if (fcn.is_string ())
     {
       // See if we can convert the string into a function.
       std::string name = args(0).string_value ();
 
       if (! valid_identifier (name))
-        func = get_function_handle (interp, args(0), "x");
+        fcn = get_function_handle (interp, args(0), "x");
       else
         {
-          func = symtab.find_function (name);
+          fcn = symtab.find_function (name);
 
-          if (func.is_undefined ())
+          if (fcn.is_undefined ())
             error_with_id ("Octave:invalid-input-arg",
                            "arrayfun: invalid function NAME: %s",
                            name.c_str ());
@@ -1171,8 +1205,8 @@
         }
     }
 
-  if (func.is_function_handle () || func.is_inline_function ()
-      || func.is_function ())
+  if (fcn.is_function_handle () || fcn.is_inline_function ()
+      || fcn.is_function ())
     {
       // The following is an optimization because the symbol table can give a
       // more specific function class, so this can result in fewer polymorphic
@@ -1180,7 +1214,7 @@
 
       if (! symbol_table_lookup)
         {
-          if (func.is_function_handle () || func.class_name () == "inline")
+          if (fcn.is_function_handle () || fcn.class_name () == "inline")
             {
               // FIXME: instead of checking for overloaded functions as
               // we did previously but is no longer possible, we could
@@ -1192,10 +1226,10 @@
             }
 
           octave_value f
-            = symtab.find_function (func.function_value () -> name ());
+            = symtab.find_function (fcn.function_value () -> name ());
 
           if (f.is_defined ())
-            func = f;
+            fcn = f;
         }
 
     nevermind:
@@ -1266,7 +1300,7 @@
                 }
 
               const octave_value_list tmp
-                = get_output_list (es, count, nargout, inputlist, func,
+                = get_output_list (es, count, nargout, inputlist, fcn,
                                    error_handler);
 
               if (nargout > 0 && tmp.length () < nargout)
@@ -1358,7 +1392,7 @@
                 }
 
               const octave_value_list tmp
-                = get_output_list (es, count, nargout, inputlist, func,
+                = get_output_list (es, count, nargout, inputlist, fcn,
                                    error_handler);
 
               if (nargout > 0 && tmp.length () < nargout)
@@ -1537,19 +1571,27 @@
 %! A = arrayfun (@(x,y) array2str (x,y), {1.1, 4}, {3.1, 6}, ...
 %!               "ErrorHandler", @__arrayfunerror);
 %! B = isfield (A(1), "message") && isfield (A(1), "index");
-%! assert ([(isfield (A(1), "identifier")), (isfield (A(2), "identifier"))], [true, true]);
-%! assert ([(isfield (A(1), "message")), (isfield (A(2), "message"))], [true, true]);
-%! assert ([(isfield (A(1), "index")), (isfield (A(2), "index"))], [true, true]);
-%! assert ([(isempty (A(1).message)), (isempty (A(2).message))], [false, false]);
+%! assert ([(isfield (A(1), "identifier")), (isfield (A(2), "identifier"))],
+%!         [true, true]);
+%! assert ([(isfield (A(1), "message")), (isfield (A(2), "message"))],
+%!         [true, true]);
+%! assert ([(isfield (A(1), "index")), (isfield (A(2), "index"))],
+%!         [true, true]);
+%! assert ([(isempty (A(1).message)), (isempty (A(2).message))],
+%!         [false, false]);
 %! assert ([A(1).index, A(2).index], [1, 2]);
 %!test  # Overwriting setting of "UniformOutput" true
 %! A = arrayfun (@(x,y) array2str (x,y), {1.1, 4}, {3.1, 6}, ...
 %!               "UniformOutput", true, "ErrorHandler", @__arrayfunerror);
 %! B = isfield (A(1), "message") && isfield (A(1), "index");
-%! assert ([(isfield (A(1), "identifier")), (isfield (A(2), "identifier"))], [true, true]);
-%! assert ([(isfield (A(1), "message")), (isfield (A(2), "message"))], [true, true]);
-%! assert ([(isfield (A(1), "index")), (isfield (A(2), "index"))], [true, true]);
-%! assert ([(isempty (A(1).message)), (isempty (A(2).message))], [false, false]);
+%! assert ([(isfield (A(1), "identifier")), (isfield (A(2), "identifier"))],
+%!         [true, true]);
+%! assert ([(isfield (A(1), "message")), (isfield (A(2), "message"))],
+%!         [true, true]);
+%! assert ([(isfield (A(1), "index")), (isfield (A(2), "index"))],
+%!         [true, true]);
+%! assert ([(isempty (A(1).message)), (isempty (A(2).message))],
+%!         [false, false]);
 %! assert ([A(1).index, A(2).index], [1, 2]);
 
 ## Input arguments can be of type character or strings
@@ -1565,7 +1607,8 @@
 %!test
 %! A = arrayfun (@(x,y) cell2str (x,y), ["a", "d"], ["c", "f"], ...
 %!               "ErrorHandler", @__arrayfunerror);
-%! B = isfield (A(1), "identifier") && isfield (A(1), "message") && isfield (A(1), "index");
+%! B = isfield (A(1), "identifier") && isfield (A(1), "message") ...
+%!     && isfield (A(1), "index");
 %! assert (B, true);
 
 ## Input arguments can be of type structure
@@ -1609,18 +1652,26 @@
 %! assert (A, {true, false});
 %!test
 %! A = arrayfun (@(x,y) num2str(x,y), {1.1, 4.2}, {3.1, 2}, "ErrorHandler", @__arrayfunerror);
-%! assert ([(isfield (A(1), "identifier")), (isfield (A(2), "identifier"))], [true, true]);
-%! assert ([(isfield (A(1), "message")), (isfield (A(2), "message"))], [true, true]);
-%! assert ([(isfield (A(1), "index")), (isfield (A(2), "index"))], [true, true]);
-%! assert ([(isempty (A(1).message)), (isempty (A(2).message))], [false, false]);
+%! assert ([(isfield (A(1), "identifier")), (isfield (A(2), "identifier"))],
+%!         [true, true]);
+%! assert ([(isfield (A(1), "message")), (isfield (A(2), "message"))],
+%!         [true, true]);
+%! assert ([(isfield (A(1), "index")), (isfield (A(2), "index"))],
+%!         [true, true]);
+%! assert ([(isempty (A(1).message)), (isempty (A(2).message))],
+%!         [false, false]);
 %! assert ([A(1).index, A(2).index], [1, 2]);
 %!test
 %! A = arrayfun (@(x,y) num2str (x,y), {1.1, 4.2}, {3.1, 2}, ...
 %!               "UniformOutput", true, "ErrorHandler", @__arrayfunerror);
-%! assert ([(isfield (A(1), "identifier")), (isfield (A(2), "identifier"))], [true, true]);
-%! assert ([(isfield (A(1), "message")), (isfield (A(2), "message"))], [true, true]);
-%! assert ([(isfield (A(1), "index")), (isfield (A(2), "index"))], [true, true]);
-%! assert ([(isempty (A(1).message)), (isempty (A(2).message))], [false, false]);
+%! assert ([(isfield (A(1), "identifier")), (isfield (A(2), "identifier"))],
+%!         [true, true]);
+%! assert ([(isfield (A(1), "message")), (isfield (A(2), "message"))],
+%!         [true, true]);
+%! assert ([(isfield (A(1), "index")), (isfield (A(2), "index"))],
+%!         [true, true]);
+%! assert ([(isempty (A(1).message)), (isempty (A(2).message))],
+%!         [false, false]);
 %! assert ([A(1).index, A(2).index], [1, 2]);
 */
 
@@ -1944,8 +1995,8 @@
 do_mat2cell_2d (const Array2D& a, const Array<octave_idx_type> *d, int nd)
 {
   Cell retval;
-  assert (nd == 1 || nd == 2);
-  assert (a.ndims () == 2);
+  error_unless (nd == 1 || nd == 2);
+  error_unless (a.ndims () == 2);
 
   if (mat2cell_mismatch (a.dims (), d, nd))
     return retval;
@@ -2001,7 +2052,7 @@
 do_mat2cell_nd (const ArrayND& a, const Array<octave_idx_type> *d, int nd)
 {
   Cell retval;
-  assert (nd >= 1);
+  error_unless (nd >= 1);
 
   if (mat2cell_mismatch (a.dims (), d, nd))
     return retval;
@@ -2065,7 +2116,7 @@
 do_mat2cell (octave_value& a, const Array<octave_idx_type> *d, int nd)
 {
   Cell retval;
-  assert (nd >= 1);
+  error_unless (nd >= 1);
 
   if (mat2cell_mismatch (a.dims (), d, nd))
     return retval;
--- a/libinterp/corefcn/chol.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/chol.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -314,7 +314,8 @@
 
 /*
 %!assert (chol ([2, 1; 1, 1]), [sqrt(2), 1/sqrt(2); 0, 1/sqrt(2)], sqrt (eps))
-%!assert (chol (single ([2, 1; 1, 1])), single ([sqrt(2), 1/sqrt(2); 0, 1/sqrt(2)]), sqrt (eps ("single")))
+%!assert (chol (single ([2, 1; 1, 1])),
+%!        single ([sqrt(2), 1/sqrt(2); 0, 1/sqrt(2)]), sqrt (eps ("single")))
 
 %!assert (chol ([2, 1; 1, 1], "upper"), [sqrt(2), 1/sqrt(2); 0, 1/sqrt(2)],
 %!        sqrt (eps))
@@ -359,7 +360,7 @@
 
 DEFUN (cholinv, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} cholinv (@var{A})
+@deftypefn {} {@var{Ainv} =} cholinv (@var{A})
 Compute the inverse of the symmetric positive definite matrix @var{A} using
 the Cholesky@tie{}factorization.
 @seealso{chol, chol2inv, inv}
@@ -483,13 +484,13 @@
 
 DEFUN (chol2inv, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} chol2inv (@var{U})
+@deftypefn {} {@var{Ainv} =} chol2inv (@var{R})
 Invert a symmetric, positive definite square matrix from its Cholesky
-decomposition, @var{U}.
+decomposition, @var{R}.
 
-Note that @var{U} should be an upper-triangular matrix with positive
-diagonal elements.  @code{chol2inv (@var{U})} provides
-@code{inv (@var{U}'*@var{U})} but it is much faster than using @code{inv}.
+Note that @var{R} should be an upper-triangular matrix with positive diagonal
+elements.  @code{chol2inv (@var{U})} provides @code{inv (@var{R}'*@var{R})} but
+is much faster than using @code{inv}.
 @seealso{chol, cholinv, inv}
 @end deftypefn */)
 {
--- a/libinterp/corefcn/conv2.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/conv2.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -40,9 +40,9 @@
 
 DEFUN (conv2, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} conv2 (@var{A}, @var{B})
-@deftypefnx {} {} conv2 (@var{v1}, @var{v2}, @var{m})
-@deftypefnx {} {} conv2 (@dots{}, @var{shape})
+@deftypefn  {} {@var{C} =} conv2 (@var{A}, @var{B})
+@deftypefnx {} {@var{C} =} conv2 (@var{v1}, @var{v2}, @var{m})
+@deftypefnx {} {@var{C} =} conv2 (@dots{}, @var{shape})
 Return the 2-D convolution of @var{A} and @var{B}.
 
 The size of the result is determined by the optional @var{shape} argument
--- a/libinterp/corefcn/daspk.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/daspk.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -68,7 +68,7 @@
 {
   ColumnVector retval;
 
-  assert (x.numel () == xdot.numel ());
+  error_unless (x.numel () == xdot.numel ());
 
   octave_value_list args;
 
@@ -117,7 +117,7 @@
 {
   Matrix retval;
 
-  assert (x.numel () == xdot.numel ());
+  error_unless (x.numel () == xdot.numel ());
 
   octave_value_list args;
 
@@ -367,11 +367,11 @@
 
   double tzero = out_times (0);
 
-  DAEFunc func (daspk_user_function);
+  DAEFunc fcn (daspk_user_function);
   if (daspk_jac.is_defined ())
-    func.set_jacobian_function (daspk_user_jacobian);
+    fcn.set_jacobian_function (daspk_user_jacobian);
 
-  DASPK dae (state, deriv, tzero, func);
+  DASPK dae (state, deriv, tzero, fcn);
   dae.set_options (daspk_opts);
 
   Matrix output;
--- a/libinterp/corefcn/dasrt.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/dasrt.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -69,7 +69,7 @@
 {
   ColumnVector retval;
 
-  assert (x.numel () == xdot.numel ());
+  error_unless (x.numel () == xdot.numel ());
 
   octave_value_list args;
 
@@ -155,7 +155,7 @@
 {
   Matrix retval;
 
-  assert (x.numel () == xdot.numel ());
+  error_unless (x.numel () == xdot.numel ());
 
   octave_value_list args;
 
@@ -432,7 +432,7 @@
   if (dasrt_fcn.is_undefined ())
     error ("dasrt: FCN argument is not a valid function name or handle");
 
-  DAERTFunc func (dasrt_user_f);
+  DAERTFunc fcn (dasrt_user_f);
 
   argp++;
 
@@ -457,7 +457,7 @@
         {
           argp++;
 
-          func.set_constraint_function (dasrt_user_cf);
+          fcn.set_constraint_function (dasrt_user_cf);
         }
     }
 
@@ -485,11 +485,11 @@
     }
 
   if (dasrt_jac.is_defined ())
-    func.set_jacobian_function (dasrt_user_j);
+    fcn.set_jacobian_function (dasrt_user_j);
 
   DASRT_result output;
 
-  DASRT dae = DASRT (state, stateprime, tzero, func);
+  DASRT dae = DASRT (state, stateprime, tzero, fcn);
 
   dae.set_options (dasrt_opts);
 
--- a/libinterp/corefcn/dassl.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/dassl.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -67,7 +67,7 @@
 {
   ColumnVector retval;
 
-  assert (x.numel () == xdot.numel ());
+  error_unless (x.numel () == xdot.numel ());
 
   octave_value_list args;
 
@@ -116,7 +116,7 @@
 {
   Matrix retval;
 
-  assert (x.numel () == xdot.numel ());
+  error_unless (x.numel () == xdot.numel ());
 
   octave_value_list args;
 
@@ -367,11 +367,11 @@
 
   double tzero = out_times (0);
 
-  DAEFunc func (dassl_user_function);
+  DAEFunc fcn (dassl_user_function);
   if (dassl_jac.is_defined ())
-    func.set_jacobian_function (dassl_user_jacobian);
+    fcn.set_jacobian_function (dassl_user_jacobian);
 
-  DASSL dae (state, deriv, tzero, func);
+  DASSL dae (state, deriv, tzero, fcn);
 
   dae.set_options (dassl_opts);
 
--- a/libinterp/corefcn/data.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/data.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -70,14 +70,14 @@
 
 DEFUN (all, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} all (@var{x})
-@deftypefnx {} {} all (@var{x}, @var{dim})
+@deftypefn  {} {@var{tf} =} all (@var{x})
+@deftypefnx {} {@var{tf} =} all (@var{x}, @var{dim})
 For a vector argument, return true (logical 1) if all elements of the vector
 are nonzero.
 
-For a matrix argument, return a row vector of logical ones and
-zeros with each element indicating whether all of the elements of the
-corresponding column of the matrix are nonzero.  For example:
+For a matrix argument, return a row vector of logical ones and zeros with each
+element indicating whether all of the elements of the corresponding column of
+the matrix are nonzero.  For example:
 
 @example
 @group
@@ -86,8 +86,7 @@
 @end group
 @end example
 
-If the optional argument @var{dim} is supplied, work along dimension
-@var{dim}.
+If the optional argument @var{dim} is supplied, work along dimension @var{dim}.
 @seealso{any}
 @end deftypefn */)
 {
@@ -128,14 +127,14 @@
 
 DEFUN (any, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} any (@var{x})
-@deftypefnx {} {} any (@var{x}, @var{dim})
+@deftypefn  {} {@var{tf} =} any (@var{x})
+@deftypefnx {} {@var{tf} =} any (@var{x}, @var{dim})
 For a vector argument, return true (logical 1) if any element of the vector
 is nonzero.
 
-For a matrix argument, return a row vector of logical ones and
-zeros with each element indicating whether any of the elements of the
-corresponding column of the matrix are nonzero.  For example:
+For a matrix argument, return a row vector of logical ones and zeros with each
+element indicating whether any of the elements of the corresponding column of
+the matrix are nonzero.  For example:
 
 @example
 @group
@@ -144,8 +143,8 @@
 @end group
 @end example
 
-If the optional argument @var{dim} is supplied, work along dimension
-@var{dim}.  For example:
+If the optional argument @var{dim} is supplied, work along dimension @var{dim}.
+For example: 
 
 @example
 @group
@@ -195,13 +194,13 @@
 
 DEFUN (atan2, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} atan2 (@var{y}, @var{x})
-Compute atan (@var{y} / @var{x}) for corresponding elements of @var{y}
-and @var{x}.
-
-@var{y} and @var{x} must match in size and orientation.  The signs of
-elements of @var{y} and @var{x} are used to determine the quadrants of each
-resulting value.
+@deftypefn {} {@var{angle} =} atan2 (@var{y}, @var{x})
+Compute atan (@var{y} / @var{x}) for corresponding elements of @var{y} and
+@var{x}.
+
+@var{y} and @var{x} must match in size and orientation.  The signs of elements
+of @var{y} and @var{x} are used to determine the quadrants of each resulting
+value.
 
 This function is equivalent to @code{arg (complex (@var{x}, @var{y}))}.
 @seealso{tan, tand, tanh, atanh}
@@ -365,8 +364,8 @@
 
 DEFUN (hypot, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} hypot (@var{x}, @var{y})
-@deftypefnx {} {} hypot (@var{x}, @var{y}, @var{z}, @dots{})
+@deftypefn  {} {@var{h} =} hypot (@var{x}, @var{y})
+@deftypefnx {} {@var{h} =} hypot (@var{x}, @var{y}, @var{z}, @dots{})
 Compute the element-by-element square root of the sum of the squares of
 @var{x} and @var{y}.
 
@@ -571,7 +570,7 @@
 
 DEFUN (rem, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} rem (@var{x}, @var{y})
+@deftypefn {} {@var{r} =} rem (@var{x}, @var{y})
 Return the remainder of the division @code{@var{x} / @var{y}}.
 
 The remainder is computed using the expression
@@ -703,8 +702,10 @@
 %!assert (rem ([1, 2, 3; -1, -2, -3], 2), [1, 0, 1; -1, 0, -1])
 %!assert (rem ([1, 2, 3; -1, -2, -3], 2 * ones (2, 3)),[1, 0, 1; -1, 0, -1])
 %!assert (rem ([0, 1, 2], [0, 0, 1]), [NaN, NaN, 0])
-%!assert (rem (uint8 ([1, 2, 3; -1, -2, -3]), uint8 (2)), uint8 ([1, 0, 1; -1, 0, -1]))
-%!assert (uint8 (rem ([1, 2, 3; -1, -2, -3], 2 * ones (2, 3))),uint8 ([1, 0, 1; -1, 0, -1]))
+%!assert (rem (uint8 ([1, 2, 3; -1, -2, -3]), uint8 (2)),
+%!        uint8 ([1, 0, 1; -1, 0, -1]))
+%!assert (uint8 (rem ([1, 2, 3; -1, -2, -3], 2 * ones (2, 3))),
+%!        uint8 ([1, 0, 1; -1, 0, -1]))
 %!assert (rem (uint8 ([0, 1, 2]), [0, 0, 1]), uint8 ([0, 0, 0]))
 
 ## Test sparse implementations
@@ -750,7 +751,7 @@
 
 DEFUN (mod, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} mod (@var{x}, @var{y})
+@deftypefn {} {@var{m} =} mod (@var{x}, @var{y})
 Compute the modulo of @var{x} and @var{y}.
 
 Conceptually this is given by
@@ -995,8 +996,8 @@
 
 DEFUN (cumprod, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} cumprod (@var{x})
-@deftypefnx {} {} cumprod (@var{x}, @var{dim})
+@deftypefn  {} {@var{y} =} cumprod (@var{x})
+@deftypefnx {} {@var{y} =} cumprod (@var{x}, @var{dim})
 Cumulative product of elements along dimension @var{dim}.
 
 If @var{dim} is omitted, it defaults to the first non-singleton dimension.
@@ -1020,12 +1021,15 @@
 %!assert (cumprod ([1, 2, 3]), [1, 2, 6])
 %!assert (cumprod ([-1; -2; -3]), [-1; 2; -6])
 %!assert (cumprod ([i, 2+i, -3+2i, 4]), [i, -1+2i, -1-8i, -4-32i])
-%!assert (cumprod ([1, 2, 3; i, 2i, 3i; 1+i, 2+2i, 3+3i]), [1, 2, 3; i, 4i, 9i; -1+i, -8+8i, -27+27i])
+%!assert (cumprod ([1, 2, 3; i, 2i, 3i; 1+i, 2+2i, 3+3i]),
+%!        [1, 2, 3; i, 4i, 9i; -1+i, -8+8i, -27+27i])
 
 %!assert (cumprod (single ([1, 2, 3])), single ([1, 2, 6]))
 %!assert (cumprod (single ([-1; -2; -3])), single ([-1; 2; -6]))
-%!assert (cumprod (single ([i, 2+i, -3+2i, 4])), single ([i, -1+2i, -1-8i, -4-32i]))
-%!assert (cumprod (single ([1, 2, 3; i, 2i, 3i; 1+i, 2+2i, 3+3i])), single ([1, 2, 3; i, 4i, 9i; -1+i, -8+8i, -27+27i]))
+%!assert (cumprod (single ([i, 2+i, -3+2i, 4])),
+%!        single ([i, -1+2i, -1-8i, -4-32i]))
+%!assert (cumprod (single ([1, 2, 3; i, 2i, 3i; 1+i, 2+2i, 3+3i])),
+%!        single ([1, 2, 3; i, 4i, 9i; -1+i, -8+8i, -27+27i]))
 
 %!assert (cumprod ([2, 3; 4, 5], 1), [2, 3; 8, 15])
 %!assert (cumprod ([2, 3; 4, 5], 2), [2, 6; 4, 20])
@@ -1038,10 +1042,10 @@
 
 DEFUN (cumsum, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} cumsum (@var{x})
-@deftypefnx {} {} cumsum (@var{x}, @var{dim})
-@deftypefnx {} {} cumsum (@dots{}, "native")
-@deftypefnx {} {} cumsum (@dots{}, "double")
+@deftypefn  {} {@var{y} =} cumsum (@var{x})
+@deftypefnx {} {@var{y} =} cumsum (@var{x}, @var{dim})
+@deftypefnx {} {@var{y} =} cumsum (@dots{}, "native")
+@deftypefnx {} {@var{y} =} cumsum (@dots{}, "double")
 Cumulative sum of elements along dimension @var{dim}.
 
 If @var{dim} is omitted, it defaults to the first non-singleton dimension.
@@ -1170,12 +1174,15 @@
 %!assert (cumsum ([1, 2, 3]), [1, 3, 6])
 %!assert (cumsum ([-1; -2; -3]), [-1; -3; -6])
 %!assert (cumsum ([i, 2+i, -3+2i, 4]), [i, 2+2i, -1+4i, 3+4i])
-%!assert (cumsum ([1, 2, 3; i, 2i, 3i; 1+i, 2+2i, 3+3i]), [1, 2, 3; 1+i, 2+2i, 3+3i; 2+2i, 4+4i, 6+6i])
+%!assert (cumsum ([1, 2, 3; i, 2i, 3i; 1+i, 2+2i, 3+3i]),
+%!        [1, 2, 3; 1+i, 2+2i, 3+3i; 2+2i, 4+4i, 6+6i])
 
 %!assert (cumsum (single ([1, 2, 3])), single ([1, 3, 6]))
 %!assert (cumsum (single ([-1; -2; -3])), single ([-1; -3; -6]))
-%!assert (cumsum (single ([i, 2+i, -3+2i, 4])), single ([i, 2+2i, -1+4i, 3+4i]))
-%!assert (cumsum (single ([1, 2, 3; i, 2i, 3i; 1+i, 2+2i, 3+3i])), single ([1, 2, 3; 1+i, 2+2i, 3+3i; 2+2i, 4+4i, 6+6i]))
+%!assert (cumsum (single ([i, 2+i, -3+2i, 4])),
+%!        single ([i, 2+2i, -1+4i, 3+4i]))
+%!assert (cumsum (single ([1, 2, 3; i, 2i, 3i; 1+i, 2+2i, 3+3i])),
+%!        single ([1, 2, 3; 1+i, 2+2i, 3+3i; 2+2i, 4+4i, 6+6i]))
 
 %!assert (cumsum ([1, 2; 3, 4], 1), [1, 2; 4, 6])
 %!assert (cumsum ([1, 2; 3, 4], 2), [1, 3; 3, 7])
@@ -1254,35 +1261,53 @@
 
 %!assert (full (diag ([1; 2; 3])), [1, 0, 0; 0, 2, 0; 0, 0, 3])
 %!assert (diag ([1; 2; 3], 1), [0, 1, 0, 0; 0, 0, 2, 0; 0, 0, 0, 3; 0, 0, 0, 0])
-%!assert (diag ([1; 2; 3], 2), [0, 0, 1, 0, 0; 0, 0, 0, 2, 0; 0, 0, 0, 0, 3; 0, 0, 0, 0, 0; 0, 0, 0, 0, 0])
-%!assert (diag ([1; 2; 3],-1), [0, 0, 0, 0; 1, 0, 0, 0; 0, 2, 0, 0; 0, 0, 3, 0])
-%!assert (diag ([1; 2; 3],-2), [0, 0, 0, 0, 0; 0, 0, 0, 0, 0; 1, 0, 0, 0, 0; 0, 2, 0, 0, 0; 0, 0, 3, 0, 0])
+%!assert (diag ([1; 2; 3], 2),
+%!        [0 0 1 0 0; 0 0 0 2 0; 0 0 0 0 3; 0 0 0 0 0; 0 0 0 0 0])
+%!assert (diag ([1; 2; 3],-1),
+%!       [0 0 0 0; 1 0 0 0; 0 2 0 0; 0 0 3 0])
+%!assert (diag ([1; 2; 3],-2),
+%!        [0 0 0 0 0; 0 0 0 0 0; 1 0 0 0 0; 0 2 0 0 0; 0 0 3 0 0])
 
 %!assert (diag ([1, 0, 0; 0, 2, 0; 0, 0, 3]), [1; 2; 3])
-%!assert (diag ([0, 1, 0, 0; 0, 0, 2, 0; 0, 0, 0, 3; 0, 0, 0, 0], 1), [1; 2; 3])
-%!assert (diag ([0, 0, 0, 0; 1, 0, 0, 0; 0, 2, 0, 0; 0, 0, 3, 0], -1), [1; 2; 3])
+%!assert (diag ([0, 1, 0, 0; 0, 0, 2, 0; 0, 0, 0, 3; 0, 0, 0, 0], 1),
+%!        [1; 2; 3])
+%!assert (diag ([0, 0, 0, 0; 1, 0, 0, 0; 0, 2, 0, 0; 0, 0, 3, 0], -1),
+%!        [1; 2; 3])
 %!assert (diag (ones (1, 0), 2), zeros (2))
 %!assert (diag (1:3, 4, 2), [1, 0; 0, 2; 0, 0; 0, 0])
 
-%!assert (full (diag (single ([1; 2; 3]))), single ([1, 0, 0; 0, 2, 0; 0, 0, 3]))
-%!assert (diag (single ([1; 2; 3]), 1), single ([0, 1, 0, 0; 0, 0, 2, 0; 0, 0, 0, 3; 0, 0, 0, 0]))
-%!assert (diag (single ([1; 2; 3]), 2), single ([0, 0, 1, 0, 0; 0, 0, 0, 2, 0; 0, 0, 0, 0, 3; 0, 0, 0, 0, 0; 0, 0, 0, 0, 0]))
-%!assert (diag (single ([1; 2; 3]),-1), single ([0, 0, 0, 0; 1, 0, 0, 0; 0, 2, 0, 0; 0, 0, 3, 0]))
-%!assert (diag (single ([1; 2; 3]),-2), single ([0, 0, 0, 0, 0; 0, 0, 0, 0, 0; 1, 0, 0, 0, 0; 0, 2, 0, 0, 0; 0, 0, 3, 0, 0]))
+%!assert (full (diag (single ([1; 2; 3]))),
+%!        single ([1, 0, 0; 0, 2, 0; 0, 0, 3]))
+%!assert (diag (single ([1; 2; 3]), 1),
+%!        single ([0, 1, 0, 0; 0, 0, 2, 0; 0, 0, 0, 3; 0, 0, 0, 0]))
+%!assert (diag (single ([1; 2; 3]), 2),
+%!        single ([0 0 1 0 0; 0 0 0 2 0; 0 0 0 0 3; 0 0 0 0 0; 0 0 0 0 0]))
+%!assert (diag (single ([1; 2; 3]),-1),
+%!        single ([0, 0, 0, 0; 1, 0, 0, 0; 0, 2, 0, 0; 0, 0, 3, 0]))
+%!assert (diag (single ([1; 2; 3]),-2),
+%!        single ([0 0 0 0 0; 0 0 0 0 0; 1 0 0 0 0; 0 2 0 0 0; 0 0 3 0 0]))
 
 %!assert (diag (single ([1, 0, 0; 0, 2, 0; 0, 0, 3])), single ([1; 2; 3]))
-%!assert (diag (single ([0, 1, 0, 0; 0, 0, 2, 0; 0, 0, 0, 3; 0, 0, 0, 0]), 1), single ([1; 2; 3]))
-%!assert (diag (single ([0, 0, 0, 0; 1, 0, 0, 0; 0, 2, 0, 0; 0, 0, 3, 0]), -1), single ([1; 2; 3]))
+%!assert (diag (single ([0, 1, 0, 0; 0, 0, 2, 0; 0, 0, 0, 3; 0, 0, 0, 0]), 1),
+%!        single ([1; 2; 3]))
+%!assert (diag (single ([0, 0, 0, 0; 1, 0, 0, 0; 0, 2, 0, 0; 0, 0, 3, 0]), -1),
+%!        single ([1; 2; 3]))
 
 %!assert (diag (int8 ([1; 2; 3])), int8 ([1, 0, 0; 0, 2, 0; 0, 0, 3]))
-%!assert (diag (int8 ([1; 2; 3]), 1), int8 ([0, 1, 0, 0; 0, 0, 2, 0; 0, 0, 0, 3; 0, 0, 0, 0]))
-%!assert (diag (int8 ([1; 2; 3]), 2), int8 ([0, 0, 1, 0, 0; 0, 0, 0, 2, 0; 0, 0, 0, 0, 3; 0, 0, 0, 0, 0; 0, 0, 0, 0, 0]))
-%!assert (diag (int8 ([1; 2; 3]),-1), int8 ([0, 0, 0, 0; 1, 0, 0, 0; 0, 2, 0, 0; 0, 0, 3, 0]))
-%!assert (diag (int8 ([1; 2; 3]),-2), int8 ([0, 0, 0, 0, 0; 0, 0, 0, 0, 0; 1, 0, 0, 0, 0; 0, 2, 0, 0, 0; 0, 0, 3, 0, 0]))
+%!assert (diag (int8 ([1; 2; 3]), 1),
+%!        int8 ([0, 1, 0, 0; 0, 0, 2, 0; 0, 0, 0, 3; 0, 0, 0, 0]))
+%!assert (diag (int8 ([1; 2; 3]), 2),
+%!        int8 ([0 0 1 0 0; 0 0 0 2 0; 0 0 0 0 3; 0 0 0 0 0; 0 0 0 0 0]))
+%!assert (diag (int8 ([1; 2; 3]),-1),
+%!        int8 ([0 0 0 0; 1 0 0 0; 0 2 0 0; 0 0 3 0]))
+%!assert (diag (int8 ([1; 2; 3]),-2),
+%!        int8 ([0 0 0 0 0; 0 0 0 0 0; 1 0 0 0 0; 0 2 0 0 0; 0 0 3 0 0]))
 
 %!assert (diag (int8 ([1, 0, 0; 0, 2, 0; 0, 0, 3])), int8 ([1; 2; 3]))
-%!assert (diag (int8 ([0, 1, 0, 0; 0, 0, 2, 0; 0, 0, 0, 3; 0, 0, 0, 0]), 1), int8 ([1; 2; 3]))
-%!assert (diag (int8 ([0, 0, 0, 0; 1, 0, 0, 0; 0, 2, 0, 0; 0, 0, 3, 0]), -1), int8 ([1; 2; 3]))
+%!assert (diag (int8 ([0, 1, 0, 0; 0, 0, 2, 0; 0, 0, 0, 3; 0, 0, 0, 0]), 1),
+%!        int8 ([1; 2; 3]))
+%!assert (diag (int8 ([0, 0, 0, 0; 1, 0, 0, 0; 0, 2, 0, 0; 0, 0, 3, 0]), -1),
+%!        int8 ([1; 2; 3]))
 
 %!assert (diag (1, 3, 3), diag ([1, 0, 0]))
 %!assert (diag (i, 3, 3), diag ([i, 0, 0]))
@@ -1295,7 +1320,8 @@
 
 %!assert <*37411> (diag (diag ([5, 2, 3])(:,1)), diag([5 0 0 ]))
 %!assert <*37411> (diag (diag ([5, 2, 3])(:,1), 2),  [0 0 5 0 0; zeros(4, 5)])
-%!assert <*37411> (diag (diag ([5, 2, 3])(:,1), -2), [[0 0 5 0 0]', zeros(5, 4)])
+%!assert <*37411> (diag (diag ([5, 2, 3])(:,1), -2),
+%!                 [[0 0 5 0 0]', zeros(5, 4)])
 
 ## Test non-square size
 %!assert (diag ([1,2,3], 6, 3), [1 0 0; 0 2 0; 0 0 3; 0 0 0; 0 0 0; 0 0 0])
@@ -1320,10 +1346,10 @@
 
 DEFUN (prod, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} prod (@var{x})
-@deftypefnx {} {} prod (@var{x}, @var{dim})
-@deftypefnx {} {} prod (@dots{}, "native")
-@deftypefnx {} {} prod (@dots{}, "double")
+@deftypefn  {} {@var{y} =} prod (@var{x})
+@deftypefnx {} {@var{y} =} prod (@var{x}, @var{dim})
+@deftypefnx {} {@var{y} =} prod (@dots{}, "native")
+@deftypefnx {} {@var{y} =} prod (@dots{}, "double")
 Product of elements along dimension @var{dim}.
 
 If @var{dim} is omitted, it defaults to the first non-singleton dimension.
@@ -1464,14 +1490,16 @@
 %!assert (prod (single ([1, 2, 3])), single (6))
 %!assert (prod (single ([-1; -2; -3])), single (-6))
 %!assert (prod (single ([i, 2+i, -3+2i, 4])), single (-4 - 32i))
-%!assert (prod (single ([1, 2, 3; i, 2i, 3i; 1+i, 2+2i, 3+3i])), single ([-1+i, -8+8i, -27+27i]))
+%!assert (prod (single ([1, 2, 3; i, 2i, 3i; 1+i, 2+2i, 3+3i])),
+%!        single ([-1+i, -8+8i, -27+27i]))
 
 ## Test sparse
 %!assert (prod (sparse ([1, 2, 3])), sparse (6))
 %!assert (prod (sparse ([-1; -2; -3])), sparse (-6))
 ## Commented out until bug #42290 is fixed
 #%!assert (prod (sparse ([i, 2+i, -3+2i, 4])), sparse (-4 - 32i))
-#%!assert (prod (sparse ([1, 2, 3; i, 2i, 3i; 1+i, 2+2i, 3+3i])), sparse ([-1+i, -8+8i, -27+27i]))
+#%!assert (prod (sparse ([1, 2, 3; i, 2i, 3i; 1+i, 2+2i, 3+3i])),
+#%!         sparse ([-1+i, -8+8i, -27+27i]))
 
 %!assert (prod ([1, 2; 3, 4], 1), [3, 8])
 %!assert (prod ([1, 2; 3, 4], 2), [2; 12])
@@ -1507,7 +1535,8 @@
 %!assert (prod (single ([1, 2, 3]), "double"), 6)
 %!assert (prod (single ([-1; -2; -3]), "double"), -6)
 %!assert (prod (single ([i, 2+i, -3+2i, 4]), "double"), -4 - 32i)
-%!assert (prod (single ([1, 2, 3; i, 2i, 3i; 1+i, 2+2i, 3+3i]), "double"), [-1+i, -8+8i, -27+27i])
+%!assert (prod (single ([1, 2, 3; i, 2i, 3i; 1+i, 2+2i, 3+3i]), "double"),
+%!        [-1+i, -8+8i, -27+27i])
 
 ## Test "native" type argument
 %!assert (prod (uint8 ([1, 2, 3]), "native"), uint8 (6))
@@ -1651,7 +1680,7 @@
 
   std::string cname = ov.class_name ();
 
-  symbol_table& symtab = __get_symbol_table__ ("attempt_type_conversion");
+  symbol_table& symtab = __get_symbol_table__ ();
 
   octave_value fcn = symtab.find_method (dtype, cname);
 
@@ -1717,7 +1746,7 @@
 
   std::string dtype = get_dispatch_type (ovl);
 
-  symbol_table& symtab = __get_symbol_table__ ("do_class_concat");
+  symbol_table& symtab = __get_symbol_table__ ();
 
   octave_value fcn = symtab.find_method (cattype, dtype);
 
@@ -1996,7 +2025,7 @@
 
 DEFUN (horzcat, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} horzcat (@var{array1}, @var{array2}, @dots{}, @var{arrayN})
+@deftypefn {} {@var{A} =} horzcat (@var{array1}, @var{array2}, @dots{}, @var{arrayN})
 Return the horizontal concatenation of N-D array objects, @var{array1},
 @var{array2}, @dots{}, @var{arrayN} along dimension 2.
 
@@ -2004,8 +2033,11 @@
 new matrices.  For example:
 
 @example
-@var{hcat} = [ @var{array1}, @var{array2}, @dots{} ]
+@var{A} = [ @var{array1}, @var{array2}, @dots{} ]
 @end example
+
+This syntax is slightly more efficient because the Octave parser can
+concatenate the arrays without the overhead of a function call.
 @seealso{cat, vertcat}
 @end deftypefn */)
 {
@@ -2235,7 +2267,7 @@
 
 DEFUN (vertcat, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} vertcat (@var{array1}, @var{array2}, @dots{}, @var{arrayN})
+@deftypefn {} {@var{A} =} vertcat (@var{array1}, @var{array2}, @dots{}, @var{arrayN})
 Return the vertical concatenation of N-D array objects, @var{array1},
 @var{array2}, @dots{}, @var{arrayN} along dimension 1.
 
@@ -2243,8 +2275,11 @@
 new matrices.  For example:
 
 @example
-@var{vcat} = [ @var{array1}; @var{array2}; @dots{} ]
+@var{A} = [ @var{array1}; @var{array2}; @dots{} ]
 @end example
+
+This syntax is slightly more efficient because the Octave parser can
+concatenate the arrays without the overhead of a function call.
 @seealso{cat, horzcat}
 @end deftypefn */)
 {
@@ -2254,14 +2289,15 @@
 /*
 %!test
 %! c = {"foo"; "bar"; "bazoloa"};
-%! assert (vertcat (c, "a", "bc", "def"), {"foo"; "bar"; "bazoloa"; "a"; "bc"; "def"});
+%! assert (vertcat (c, "a", "bc", "def"),
+%!         {"foo"; "bar"; "bazoloa"; "a"; "bc"; "def"});
 */
 
 DEFUN (cat, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} cat (@var{dim}, @var{array1}, @var{array2}, @dots{}, @var{arrayN})
-Return the concatenation of N-D array objects, @var{array1},
-@var{array2}, @dots{}, @var{arrayN} along dimension @var{dim}.
+@deftypefn {} {@var{A} =} cat (@var{dim}, @var{array1}, @var{array2}, @dots{}, @var{arrayN})
+Return the concatenation of N-D array objects, @var{array1}, @var{array2},
+@dots{}, @var{arrayN} along dimension @var{dim}.
 
 @example
 @group
@@ -2273,8 +2309,8 @@
 @end group
 @end example
 
-Alternatively, we can concatenate @var{A} and @var{B} along the
-second dimension in the following way:
+Alternatively, we can concatenate @var{A} and @var{B} along the second
+dimension in the following way:
 
 @example
 @group
@@ -2282,9 +2318,8 @@
 @end group
 @end example
 
-@var{dim} can be larger than the dimensions of the N-D array objects
-and the result will thus have @var{dim} dimensions as the
-following example shows:
+@var{dim} can be larger than the dimensions of the N-D array objects and the
+result will thus have @var{dim} dimensions as the following example shows:
 
 @example
 @group
@@ -2321,11 +2356,13 @@
 %!  assert (cat (1, cast (1, t1), cast (2, t2)), cast ([1; 2], tr));
 %!  assert (cat (1, cast (1, t1), cast ([2; 3], t2)), cast ([1; 2; 3], tr));
 %!  assert (cat (1, cast ([1; 2], t1), cast (3, t2)), cast ([1; 2; 3], tr));
-%!  assert (cat (1, cast ([1; 2], t1), cast ([3; 4], t2)), cast ([1; 2; 3; 4], tr));
+%!  assert (cat (1, cast ([1; 2], t1), cast ([3; 4], t2)),
+%!          cast ([1; 2; 3; 4], tr));
 %!  assert (cat (2, cast (1, t1), cast (2, t2)), cast ([1, 2], tr));
 %!  assert (cat (2, cast (1, t1), cast ([2, 3], t2)), cast ([1, 2, 3], tr));
 %!  assert (cat (2, cast ([1, 2], t1), cast (3, t2)), cast ([1, 2, 3], tr));
-%!  assert (cat (2, cast ([1, 2], t1), cast ([3, 4], t2)), cast ([1, 2, 3, 4], tr));
+%!  assert (cat (2, cast ([1, 2], t1), cast ([3, 4], t2)),
+%!          cast ([1, 2, 3, 4], tr));
 %!
 %!  assert ([cast(1, t1); cast(2, t2)], cast ([1; 2], tr));
 %!  assert ([cast(1, t1); cast([2; 3], t2)], cast ([1; 2; 3], tr));
@@ -2340,12 +2377,13 @@
 %!    assert (cat (1, cast (1i, t1), cast (2, t2)), cast ([1i; 2], tr));
 %!    assert (cat (1, cast (1i, t1), cast ([2; 3], t2)), cast ([1i; 2; 3], tr));
 %!    assert (cat (1, cast ([1i; 2], t1), cast (3, t2)), cast ([1i; 2; 3], tr));
-%!    assert (cat (1, cast ([1i; 2], t1), cast ([3; 4], t2)), cast ([1i; 2; 3; 4], tr));
+%!    assert (cat (1, cast ([1i; 2], t1), cast ([3; 4], t2)),
+%!            cast ([1i; 2; 3; 4], tr));
 %!    assert (cat (2, cast (1i, t1), cast (2, t2)), cast ([1i, 2], tr));
 %!    assert (cat (2, cast (1i, t1), cast ([2, 3], t2)), cast ([1i, 2, 3], tr));
 %!    assert (cat (2, cast ([1i, 2], t1), cast (3, t2)), cast ([1i, 2, 3], tr));
-%!    assert (cat (2, cast ([1i, 2], t1), cast ([3, 4], t2)), cast ([1i, 2, 3, 4], tr));
-%!
+%!    assert (cat (2, cast ([1i, 2], t1), cast ([3, 4], t2)),
+%!            cast ([1i, 2, 3, 4], tr));
 %!    assert ([cast(1i, t1); cast(2, t2)], cast ([1i; 2], tr));
 %!    assert ([cast(1i, t1); cast([2; 3], t2)], cast ([1i; 2; 3], tr));
 %!    assert ([cast([1i; 2], t1); cast(3, t2)], cast ([1i; 2; 3], tr));
@@ -2358,12 +2396,13 @@
 %!    assert (cat (1, cast (1, t1), cast (2i, t2)), cast ([1; 2i], tr));
 %!    assert (cat (1, cast (1, t1), cast ([2i; 3], t2)), cast ([1; 2i; 3], tr));
 %!    assert (cat (1, cast ([1; 2], t1), cast (3i, t2)), cast ([1; 2; 3i], tr));
-%!    assert (cat (1, cast ([1; 2], t1), cast ([3i; 4], t2)), cast ([1; 2; 3i; 4], tr));
+%!    assert (cat (1, cast ([1; 2], t1), cast ([3i; 4], t2)),
+%!            cast ([1; 2; 3i; 4], tr));
 %!    assert (cat (2, cast (1, t1), cast (2i, t2)), cast ([1, 2i], tr));
 %!    assert (cat (2, cast (1, t1), cast ([2i, 3], t2)), cast ([1, 2i, 3], tr));
 %!    assert (cat (2, cast ([1, 2], t1), cast (3i, t2)), cast ([1, 2, 3i], tr));
-%!    assert (cat (2, cast ([1, 2], t1), cast ([3i, 4], t2)), cast ([1, 2, 3i, 4], tr));
-%!
+%!    assert (cat (2, cast ([1, 2], t1), cast ([3i, 4], t2)),
+%!            cast ([1, 2, 3i, 4], tr));
 %!    assert ([cast(1, t1); cast(2i, t2)], cast ([1; 2i], tr));
 %!    assert ([cast(1, t1); cast([2i; 3], t2)], cast ([1; 2i; 3], tr));
 %!    assert ([cast([1; 2], t1); cast(3i, t2)], cast ([1; 2; 3i], tr));
@@ -2374,22 +2413,30 @@
 %!    assert ([cast([1, 2], t1), cast([3i, 4], t2)], cast ([1, 2, 3i, 4], tr));
 %!
 %!    assert (cat (1, cast (1i, t1), cast (2i, t2)), cast ([1i; 2i], tr));
-%!    assert (cat (1, cast (1i, t1), cast ([2i; 3], t2)), cast ([1i; 2i; 3], tr));
-%!    assert (cat (1, cast ([1i; 2], t1), cast (3i, t2)), cast ([1i; 2; 3i], tr));
-%!    assert (cat (1, cast ([1i; 2], t1), cast ([3i; 4], t2)), cast ([1i; 2; 3i; 4], tr));
+%!    assert (cat (1, cast (1i, t1), cast ([2i; 3], t2)),
+%!            cast ([1i; 2i; 3], tr));
+%!    assert (cat (1, cast ([1i; 2], t1), cast (3i, t2)),
+%!            cast ([1i; 2; 3i], tr));
+%!    assert (cat (1, cast ([1i; 2], t1), cast ([3i; 4], t2)),
+%!            cast ([1i; 2; 3i; 4], tr));
 %!    assert (cat (2, cast (1i, t1), cast (2i, t2)), cast ([1i, 2i], tr));
-%!    assert (cat (2, cast (1i, t1), cast ([2i, 3], t2)), cast ([1i, 2i, 3], tr));
-%!    assert (cat (2, cast ([1i, 2], t1), cast (3i, t2)), cast ([1i, 2, 3i], tr));
-%!    assert (cat (2, cast ([1i, 2], t1), cast ([3i, 4], t2)), cast ([1i, 2, 3i, 4], tr));
+%!    assert (cat (2, cast (1i, t1), cast ([2i, 3], t2)),
+%!            cast ([1i, 2i, 3], tr));
+%!    assert (cat (2, cast ([1i, 2], t1), cast (3i, t2)),
+%!            cast ([1i, 2, 3i], tr));
+%!    assert (cat (2, cast ([1i, 2], t1), cast ([3i, 4], t2)),
+%!            cast ([1i, 2, 3i, 4], tr));
 %!
 %!    assert ([cast(1i, t1); cast(2i, t2)], cast ([1i; 2i], tr));
 %!    assert ([cast(1i, t1); cast([2i; 3], t2)], cast ([1i; 2i; 3], tr));
 %!    assert ([cast([1i; 2], t1); cast(3i, t2)], cast ([1i; 2; 3i], tr));
-%!    assert ([cast([1i; 2], t1); cast([3i; 4], t2)], cast ([1i; 2; 3i; 4], tr));
+%!    assert ([cast([1i; 2], t1); cast([3i; 4], t2)],
+%!            cast ([1i; 2; 3i; 4], tr));
 %!    assert ([cast(1i, t1), cast(2i, t2)], cast ([1i, 2i], tr));
 %!    assert ([cast(1i, t1), cast([2i, 3], t2)], cast ([1i, 2i, 3], tr));
 %!    assert ([cast([1i, 2], t1), cast(3i, t2)], cast ([1i, 2, 3i], tr));
-%!    assert ([cast([1i, 2], t1), cast([3i, 4], t2)], cast ([1i, 2, 3i, 4], tr));
+%!    assert ([cast([1i, 2], t1), cast([3i, 4], t2)],
+%!            cast ([1i, 2, 3i, 4], tr));
 %!  endif
 %!  ret = true;
 %!endfunction
@@ -2482,7 +2529,7 @@
 
 DEFUN (permute, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} permute (@var{A}, @var{perm})
+@deftypefn {} {@var{B} =} permute (@var{A}, @var{perm})
 Return the generalized transpose for an N-D array object @var{A}.
 
 The permutation vector @var{perm} must contain the elements
@@ -2515,7 +2562,7 @@
 
 DEFUN (ipermute, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} ipermute (@var{A}, @var{iperm})
+@deftypefn {} {@var{A} =} ipermute (@var{B}, @var{iperm})
 The inverse of the @code{permute} function.
 
 The expression
@@ -2534,13 +2581,13 @@
 
 DEFUN (length, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} length (@var{a})
-Return the length of the object @var{a}.
+@deftypefn {} {@var{n} =} length (@var{A})
+Return the length of the object @var{A}.
 
 The length is 0 for empty objects, 1 for scalars, and the number of elements
 for vectors.  For matrix or N-dimensional objects, the length is the number
 of elements along the largest dimension
-(equivalent to @w{@code{max (size (@var{a}))}}).
+(equivalent to @w{@code{max (size (@var{A}))}}).
 @seealso{numel, size}
 @end deftypefn */)
 {
@@ -2552,12 +2599,12 @@
 
 DEFUN (ndims, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} ndims (@var{a})
-Return the number of dimensions of @var{a}.
+@deftypefn {} {@var{n} =} ndims (@var{A})
+Return the number of dimensions of @var{A}.
 
 For any array, the result will always be greater than or equal to 2.
-Trailing singleton dimensions are not counted, i.e., tailing dimensions @var{d}
-greater than 2, for which @code{size (@var{a}, @var{d}) = 1}.
+Trailing singleton dimensions are not counted, i.e., trailing dimensions @var{d}
+greater than 2 for which @code{size (@var{A}, @var{d}) = 1}.
 
 @example
 @group
@@ -2592,15 +2639,15 @@
 
 DEFUN (numel, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} numel (@var{a})
-@deftypefnx {} {} numel (@var{a}, @var{idx1}, @var{idx2}, @dots{})
-Return the number of elements in the object @var{a}.
+@deftypefn  {} {@var{n} =} numel (@var{A})
+@deftypefnx {} {@var{n} =} numel (@var{A}, @var{idx1}, @var{idx2}, @dots{})
+Return the number of elements in the object @var{A}.
 
 Optionally, if indices @var{idx1}, @var{idx2}, @dots{} are supplied,
 return the number of elements that would result from the indexing
 
 @example
-@var{a}(@var{idx1}, @var{idx2}, @dots{})
+@var{A}(@var{idx1}, @var{idx2}, @dots{})
 @end example
 
 Note that the indices do not have to be scalar numbers.  For example,
@@ -2620,8 +2667,8 @@
 
 @example
 @group
-@var{a} = ones (5, 3);
-numel (@var{a}, 2, ":")
+@var{A} = ones (5, 3);
+numel (@var{A}, 2, ":")
 @end group
 @end example
 
@@ -2654,12 +2701,12 @@
 
 DEFUN (size, args, nargout,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {@var{sz} =} size (@var{a})
-@deftypefnx {} {@var{dim_sz} =} size (@var{a}, @var{dim})
-@deftypefnx {} {@var{dim_sz} =} size (@var{a}, @var{d1}, @var{d2}, @dots{})
+@deftypefn  {} {@var{sz} =} size (@var{A})
+@deftypefnx {} {@var{dim_sz} =} size (@var{A}, @var{dim})
+@deftypefnx {} {@var{dim_sz} =} size (@var{A}, @var{d1}, @var{d2}, @dots{})
 @deftypefnx {} {[@var{rows}, @var{cols}, @dots{}, @var{dim_N_sz}] =} size (@dots{})
 Return a row vector with the size (number of elements) of each dimension for
-the object @var{a}.
+the object @var{A}.
 
 When given a second argument, @var{dim}, return the size of the corresponding
 dimension.  If @var{dim} is a vector, return each of the corresponding
@@ -2669,7 +2716,7 @@
 with multiple output arguments, @code{size} returns the size of dimension N
 in the Nth argument.  The number of rows, dimension 1, is returned in the
 first argument, the number of columns, dimension 2, is returned in the
-second argument, etc.  If there are more dimensions in @var{a} than there are
+second argument, etc.  If there are more dimensions in @var{A} than there are
 output arguments, @code{size} returns the total number of elements in the
 remaining dimensions in the final output argument.
 
@@ -2863,7 +2910,8 @@
 
 DEFUN (size_equal, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} size_equal (@var{a}, @var{b}, @dots{})
+@deftypefn  {} {@var{TF} =} size_equal (@var{A}, @var{B})
+@deftypefnx {} {@var{TF} =} size_equal (@var{A}, @var{B}, @dots{})
 Return true if the dimensions of all arguments agree.
 
 Trailing singleton dimensions are ignored.  When called with a single argument,
@@ -2891,8 +2939,8 @@
 
 DEFUN (nnz, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {@var{n} =} nnz (@var{a})
-Return the number of nonzero elements in @var{a}.
+@deftypefn {} {@var{n} =} nnz (@var{A})
+Return the number of nonzero elements in @var{A}.
 @seealso{nzmax, nonzeros, find}
 @end deftypefn */)
 {
@@ -2940,9 +2988,10 @@
 
 DEFUN (rows, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} rows (@var{a})
-Return the number of rows of @var{a}.  This is equivalent to
-@code{size (@var{a}, 1)}.
+@deftypefn {} {@var{nr} =} rows (@var{A})
+Return the number of rows of @var{A}.
+
+This is equivalent to @code{size (@var{A}, 1)}.
 @seealso{columns, size, length, numel, isscalar, isvector, ismatrix}
 @end deftypefn */)
 {
@@ -2984,9 +3033,10 @@
 
 DEFUN (columns, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} columns (@var{a})
-Return the number of columns of @var{a}.  This is equivalent to
-@code{size (@var{a}, 2)}.
+@deftypefn {} {@var{nc} =} columns (@var{A})
+Return the number of columns of @var{A}.
+
+This is equivalent to @code{size (@var{A}, 2)}.
 @seealso{rows, size, length, numel, isscalar, isvector, ismatrix}
 @end deftypefn */)
 {
@@ -3001,11 +3051,11 @@
 
 DEFUN (sum, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} sum (@var{x})
-@deftypefnx {} {} sum (@var{x}, @var{dim})
-@deftypefnx {} {} sum (@dots{}, "native")
-@deftypefnx {} {} sum (@dots{}, "double")
-@deftypefnx {} {} sum (@dots{}, "extra")
+@deftypefn  {} {@var{y} =} sum (@var{x})
+@deftypefnx {} {@var{y} =} sum (@var{x}, @var{dim})
+@deftypefnx {} {@var{y} =} sum (@dots{}, "native")
+@deftypefnx {} {@var{y} =} sum (@dots{}, "double")
+@deftypefnx {} {@var{y} =} sum (@dots{}, "extra")
 Sum of elements along dimension @var{dim}.
 
 If @var{dim} is omitted, it defaults to the first non-singleton dimension.
@@ -3173,7 +3223,8 @@
 %!assert (sum (single ([1, 2, 3])), single (6))
 %!assert (sum (single ([-1; -2; -3])), single (-6))
 %!assert (sum (single ([i, 2+i, -3+2i, 4])), single (3+4i))
-%!assert (sum (single ([1, 2, 3; i, 2i, 3i; 1+i, 2+2i, 3+3i])), single ([2+2i, 4+4i, 6+6i]))
+%!assert (sum (single ([1, 2, 3; i, 2i, 3i; 1+i, 2+2i, 3+3i])),
+%!        single ([2+2i, 4+4i, 6+6i]))
 
 %!assert (sum ([1, 2; 3, 4], 1), [4, 6])
 %!assert (sum ([1, 2; 3, 4], 2), [3; 7])
@@ -3231,8 +3282,8 @@
 
 DEFUN (sumsq, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} sumsq (@var{x})
-@deftypefnx {} {} sumsq (@var{x}, @var{dim})
+@deftypefn  {} {@var{y} =} sumsq (@var{x})
+@deftypefnx {} {@var{y} =} sumsq (@var{x}, @var{dim})
 Sum of squares of elements along dimension @var{dim}.
 
 If @var{dim} is omitted, it defaults to the first non-singleton dimension.
@@ -3271,8 +3322,8 @@
 
 DEFUN (islogical, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} islogical (@var{x})
-@deftypefnx {} {} isbool (@var{x})
+@deftypefn  {} {@var{tf} =} islogical (@var{x})
+@deftypefnx {} {@var{tf} =} isbool (@var{x})
 Return true if @var{x} is a logical object.
 @seealso{ischar, isfloat, isinteger, isstring, isnumeric, isa}
 @end deftypefn */)
@@ -3301,7 +3352,7 @@
 
 DEFUN (isinteger, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} isinteger (@var{x})
+@deftypefn {} {@var{tf} =} isinteger (@var{x})
 Return true if @var{x} is an integer object (int8, uint8, int16, etc.).
 
 Note that @w{@code{isinteger (14)}} is false because numeric constants in
@@ -3359,7 +3410,7 @@
 
 DEFUN (iscomplex, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} iscomplex (@var{x})
+@deftypefn {} {@var{tf} =} iscomplex (@var{x})
 Return true if @var{x} is a complex-valued numeric object.
 @seealso{isreal, isnumeric, ischar, isfloat, islogical, isstring, isa}
 @end deftypefn */)
@@ -3389,7 +3440,7 @@
 
 DEFUN (isfloat, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} isfloat (@var{x})
+@deftypefn {} {@var{tf} =} isfloat (@var{x})
 Return true if @var{x} is a floating-point numeric object.
 
 Objects of class double or single are floating-point objects.
@@ -3407,8 +3458,8 @@
 
 DEFUN (complex, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} complex (@var{x})
-@deftypefnx {} {} complex (@var{re}, @var{im})
+@deftypefn  {} {@var{z} =} complex (@var{x})
+@deftypefnx {} {@var{z} =} complex (@var{re}, @var{im})
 Return a complex value from real arguments.
 
 With 1 real argument @var{x}, return the complex result
@@ -3428,6 +3479,12 @@
 @end example
 @seealso{real, imag, iscomplex, abs, arg}
 @end deftypefn */)
+// Programming Note: Throughout this function the coding pattern
+// octave_value (new XXX)) is used.  This is done specifically because the
+// default octave_value constructor would otherwise perform automatic narrowing
+// (i.e., complex values with 0 for the imaginary part would be converted
+// to real values).  The complex() function *must* return a complex value
+// even when the imaginary part is 0.
 {
   int nargin = args.length ();
 
@@ -3565,11 +3622,10 @@
                 {
                   const FloatNDArray im_val = im.float_array_value ();
 
-                  FloatComplexNDArray result (im_val.dims (),
-                                              FloatComplex ());
+                  FloatComplexNDArray result (im_val.dims ());
 
                   for (octave_idx_type i = 0; i < im_val.numel (); i++)
-                    result.xelem (i) = FloatComplex (re_val, im_val(i));
+                    result.xelem (i) = FloatComplex (re_val, im_val.xelem (i));
 
                   retval = octave_value (new octave_float_complex_matrix
                                          (result));
@@ -3583,11 +3639,10 @@
                 {
                   float im_val = im.float_value ();
 
-                  FloatComplexNDArray result (re_val.dims (),
-                                              FloatComplex ());
+                  FloatComplexNDArray result (re_val.dims ());
 
                   for (octave_idx_type i = 0; i < re_val.numel (); i++)
-                    result.xelem (i) = FloatComplex (re_val(i), im_val);
+                    result.xelem (i) = FloatComplex (re_val.xelem (i), im_val);
 
                   retval = octave_value (new octave_float_complex_matrix
                                          (result));
@@ -3599,12 +3654,11 @@
                   if (re_val.dims () != im_val.dims ())
                     error ("complex: dimension mismatch");
 
-                  FloatComplexNDArray result (re_val.dims (),
-                                              FloatComplex ());
+                  FloatComplexNDArray result (re_val.dims ());
 
                   for (octave_idx_type i = 0; i < re_val.numel (); i++)
-                    result.xelem (i) = FloatComplex (re_val(i),
-                                                     im_val(i));
+                    result.xelem (i) = FloatComplex (re_val.xelem (i),
+                                                     im_val.xelem (i));
 
                   retval = octave_value (new octave_float_complex_matrix
                                          (result));
@@ -3626,10 +3680,10 @@
             {
               const NDArray im_val = im.array_value ();
 
-              ComplexNDArray result (im_val.dims (), Complex ());
+              ComplexNDArray result (im_val.dims ());
 
               for (octave_idx_type i = 0; i < im_val.numel (); i++)
-                result.xelem (i) = Complex (re_val, im_val(i));
+                result.xelem (i) = Complex (re_val, im_val.xelem (i));
 
               retval = octave_value (new octave_complex_matrix (result));
             }
@@ -3642,10 +3696,10 @@
             {
               double im_val = im.double_value ();
 
-              ComplexNDArray result (re_val.dims (), Complex ());
+              ComplexNDArray result (re_val.dims ());
 
               for (octave_idx_type i = 0; i < re_val.numel (); i++)
-                result.xelem (i) = Complex (re_val(i), im_val);
+                result.xelem (i) = Complex (re_val.xelem (i), im_val);
 
               retval = octave_value (new octave_complex_matrix (result));
             }
@@ -3659,7 +3713,8 @@
               ComplexNDArray result (re_val.dims (), Complex ());
 
               for (octave_idx_type i = 0; i < re_val.numel (); i++)
-                result.xelem (i) = Complex (re_val(i), im_val(i));
+                result.xelem (i) = Complex (re_val.xelem (i),
+                                            im_val.xelem (i));
 
               retval = octave_value (new octave_complex_matrix (result));
             }
@@ -3714,7 +3769,7 @@
 
 DEFUN (isreal, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} isreal (@var{x})
+@deftypefn {} {@var{tf} =} isreal (@var{x})
 Return true if @var{x} is a non-complex matrix or scalar.
 
 For compatibility with @sc{matlab}, this includes logical and character
@@ -3730,8 +3785,8 @@
 
 DEFUN (isempty, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} isempty (@var{a})
-Return true if @var{a} is an empty matrix (any one of its dimensions is
+@deftypefn {} {@var{tf} =} isempty (@var{A})
+Return true if @var{A} is an empty matrix (any one of its dimensions is
 zero).
 @seealso{isnull, isa}
 @end deftypefn */)
@@ -3749,7 +3804,7 @@
 
 DEFUN (isnumeric, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} isnumeric (@var{x})
+@deftypefn {} {@var{tf} =} isnumeric (@var{x})
 Return true if @var{x} is a numeric object, i.e., an integer, real, or
 complex array.
 
@@ -3782,7 +3837,7 @@
 
 DEFUN (isscalar, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} isscalar (@var{x})
+@deftypefn {} {@var{tf} =} isscalar (@var{x})
 Return true if @var{x} is a scalar.
 
 A scalar is an object with two dimensions for which @code{size (@var{x})}
@@ -3821,7 +3876,7 @@
 
 DEFUN (isvector, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} isvector (@var{x})
+@deftypefn {} {@var{tf} =} isvector (@var{x})
 Return true if @var{x} is a vector.
 
 A vector is a 2-D array where one of the dimensions is equal to 1 (either
@@ -3862,7 +3917,7 @@
 
 DEFUN (isrow, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} isrow (@var{x})
+@deftypefn {} {@var{tf} =} isrow (@var{x})
 Return true if @var{x} is a row vector.
 
 A row vector is a 2-D array for which @code{size (@var{x})} returns
@@ -3911,7 +3966,7 @@
 
 DEFUN (iscolumn, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} iscolumn (@var{x})
+@deftypefn {} {@var{tf} =} iscolumn (@var{x})
 Return true if @var{x} is a column vector.
 
 A column vector is a 2-D array for which @code{size (@var{x})} returns
@@ -3960,7 +4015,7 @@
 
 DEFUN (ismatrix, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} ismatrix (@var{x})
+@deftypefn {} {@var{tf} =} ismatrix (@var{x})
 Return true if @var{x} is a 2-D array.
 
 A matrix is an object with two dimensions (@code{ndims (@var{x}) == 2}) for
@@ -4009,7 +4064,7 @@
 
 DEFUN (issquare, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} issquare (@var{x})
+@deftypefn {} {@var{tf} =} issquare (@var{x})
 Return true if @var{x} is a 2-D square array.
 
 A square array is a 2-D object for which @code{size (@var{x})} returns
@@ -4093,7 +4148,12 @@
         dims.resize (nargin);
 
         for (int i = 0; i < nargin; i++)
-          dims(i) = (args(i).isempty () ? 0 : args(i).idx_type_value (true));
+          {
+            if (args(i).numel () > 1)
+              error ("%s: dimensions must be scalars.", fcn);
+
+            dims(i) = (args(i).isempty () ? 0 : args(i).idx_type_value (true));
+          }
       }
       break;
     }
@@ -4245,7 +4305,12 @@
         dims.resize (nargin);
 
         for (int i = 0; i < nargin; i++)
-          dims(i) = (args(i).isempty () ? 0 : args(i).idx_type_value (true));
+          {
+            if (args(i).numel () > 1)
+              error ("%s: dimensions must be scalars.", fcn);
+
+            dims(i) = (args(i).isempty () ? 0 : args(i).idx_type_value (true));
+          }
       }
       break;
     }
@@ -4327,7 +4392,12 @@
         dims.resize (nargin);
 
         for (int i = 0; i < nargin; i++)
-          dims(i) = (args(i).isempty () ? 0 : args(i).idx_type_value (true));
+          {
+            if (args(i).numel () > 1)
+              error ("%s: dimensions must be scalars.", fcn);
+
+            dims(i) = (args(i).isempty () ? 0 : args(i).idx_type_value (true));
+          }
       }
       break;
     }
@@ -4391,7 +4461,12 @@
         dims.resize (nargin);
 
         for (int i = 0; i < nargin; i++)
-          dims(i) = (args(i).isempty () ? 0 : args(i).idx_type_value (true));
+          {
+            if (args(i).numel () > 1)
+              error ("%s: dimensions must be scalars.", fcn);
+
+            dims(i) = (args(i).isempty () ? 0 : args(i).idx_type_value (true));
+          }
       }
       break;
     }
@@ -4469,7 +4544,12 @@
         dims.resize (nargin);
 
         for (int i = 0; i < nargin; i++)
-          dims(i) = (args(i).isempty () ? 0 : args(i).idx_type_value (true));
+          {
+            if (args(i).numel () > 1)
+              error ("%s: dimensions must be scalars.", fcn);
+
+            dims(i) = (args(i).isempty () ? 0 : args(i).idx_type_value (true));
+          }
       }
       break;
     }
@@ -4563,6 +4643,10 @@
 %!error <conversion of 1.1 .*failed> ones (1, 1.1)
 %!error <conversion of 1.1 .*failed> ones ([1, 1.1])
 %!error <sparse ND .* not supported> ones (3, 3, 3, "like", speye (1))
+%!error <must be scalar> ones (1:3, 1)
+%!error <must be scalar> ones (1, 1:3)
+%!error <must be scalar> ones (1, 2, 1:3)
+%!error <must be scalar> ones (1:3, 1, "like", single (1))
 */
 
 /*
@@ -4571,14 +4655,14 @@
 ## n to be a 1x0 vector (returns 0x0) but not a 0x1 vector.  Octave supports
 ## any vector and therefore must support 0x1, 1x0, and 0x0x1 (but not 0x1x1).
 %!test <*47298>
-%! funcs = {@zeros, @ones, @inf, @nan, @NA, @i, @pi, @e};
-%! for idx = 1:numel (funcs)
-%!   func = funcs{idx};
-%!   assert (func (zeros (1, 0)), zeros (0, 0));
-%!   assert (func (zeros (0, 1)), zeros (0, 0));
-%!   assert (func (zeros (0, 1, 1)), zeros (0, 0));
-%!   fail ([func2str(func) " ([])"]);
-%!   fail ([func2str(func) " (zeros (0, 0, 1))"]);
+%! fcns = {@zeros, @ones, @inf, @nan, @NA, @i, @pi, @e};
+%! for idx = 1:numel (fcns)
+%!   fcn = fcns{idx};
+%!   assert (fcn (zeros (1, 0)), zeros (0, 0));
+%!   assert (fcn (zeros (0, 1)), zeros (0, 0));
+%!   assert (fcn (zeros (0, 1, 1)), zeros (0, 0));
+%!   fail ([func2str(fcn) " ([])"]);
+%!   fail ([func2str(fcn) " (zeros (0, 0, 1))"]);
 %! endfor
 */
 
@@ -4644,6 +4728,10 @@
 %!error <conversion of 1.1 .*failed> zeros (1, 1.1, 2)
 %!error <conversion of 1.1 .*failed> zeros ([1, 1.1, 2])
 %!error <sparse ND .* not supported> zeros (3, 3, 3, "like", speye (1))
+%!error <must be scalar> zeros (1:3, 1)
+%!error <must be scalar> zeros (1, 1:3)
+%!error <must be scalar> zeros (1, 2, 1:3)
+%!error <must be scalar> zeros (1:3, 1, "like", single (1))
 */
 
 DEFUN (Inf, args, ,
@@ -4651,11 +4739,11 @@
 @c List other form of function in documentation index
 @findex inf
 
-@deftypefn  {} {} Inf
-@deftypefnx {} {} Inf (@var{n})
-@deftypefnx {} {} Inf (@var{n}, @var{m})
-@deftypefnx {} {} Inf (@var{n}, @var{m}, @var{k}, @dots{})
-@deftypefnx {} {} Inf (@dots{}, @var{class})
+@deftypefn  {} {@var{A} =} Inf
+@deftypefnx {} {@var{A} =} Inf (@var{n})
+@deftypefnx {} {@var{A} =} Inf (@var{n}, @var{m})
+@deftypefnx {} {@var{A} =} Inf (@var{n}, @var{m}, @var{k}, @dots{})
+@deftypefnx {} {@var{A} =} Inf (@dots{}, @var{class})
 Return a scalar, matrix or N-dimensional array whose elements are all equal
 to the IEEE representation for positive infinity.
 
@@ -4696,7 +4784,8 @@
 %!assert (Inf (3, 2), [Inf, Inf; Inf, Inf; Inf, Inf])
 %!assert (size (Inf (3, 4, 5)), [3, 4, 5])
 
-%!assert (Inf (3, "single"), single ([Inf, Inf, Inf; Inf, Inf, Inf; Inf, Inf, Inf]))
+%!assert (Inf (3, "single"),
+%!        single ([Inf, Inf, Inf; Inf, Inf, Inf; Inf, Inf, Inf]))
 %!assert (Inf (2, 3, "single"), single ([Inf, Inf, Inf; Inf, Inf, Inf]))
 %!assert (Inf (3, 2, "single"), single ([Inf, Inf; Inf, Inf; Inf, Inf]))
 %!assert (size (inf (3, 4, 5, "single")), [3, 4, 5])
@@ -4704,7 +4793,8 @@
 %!assert (Inf (2, 2, "like", speye (2)), sparse ([Inf, Inf; Inf, Inf]))
 %!assert (Inf (2, 2, "like", complex (ones (2, 2))), [Inf, Inf; Inf, Inf])
 %!assert (Inf (2, 2, "like", double (1)), double ([Inf, Inf; Inf, Inf]))
-%!assert (Inf (3, 3, "like", single (1)), single ([Inf, Inf, Inf; Inf, Inf, Inf; Inf, Inf, Inf]))
+%!assert (Inf (3, 3, "like", single (1)),
+%!        single ([Inf, Inf, Inf; Inf, Inf, Inf; Inf, Inf, Inf]))
 %!assert (Inf (2, "like", single (1i)), single ([Inf, Inf; Inf, Inf]))
 
 %!error Inf (3, "like", int8 (1))
@@ -4715,6 +4805,10 @@
 %!error Inf (3, 4, 5, "int8")
 %!error <input .* floating> Inf (3, 3, "like", true)
 %!error <input .* floating> Inf (2, "like", uint8 (1))
+%!error <must be scalar> Inf (1:3, 1)
+%!error <must be scalar> Inf (1, 1:3)
+%!error <must be scalar> Inf (1, 2, 1:3)
+%!error <must be scalar> Inf (1:3, 1, "like", single (1))
 */
 
 DEFUN (NaN, args, ,
@@ -4775,14 +4869,16 @@
 %!assert (NaN (3, 2), [NaN, NaN; NaN, NaN; NaN, NaN])
 %!assert (size (NaN (3, 4, 5)), [3, 4, 5])
 
-%!assert (NaN (3, "single"), single ([NaN, NaN, NaN; NaN, NaN, NaN; NaN, NaN, NaN]))
+%!assert (NaN (3, "single"),
+%!        single ([NaN, NaN, NaN; NaN, NaN, NaN; NaN, NaN, NaN]))
 %!assert (NaN (2, 3, "single"), single ([NaN, NaN, NaN; NaN, NaN, NaN]))
 %!assert (NaN (3, 2, "single"), single ([NaN, NaN; NaN, NaN; NaN, NaN]))
 %!assert (size (NaN (3, 4, 5, "single")), [3, 4, 5])
 
 %!assert (NaN (2, 2, "like", double (1)), double ([NaN, NaN; NaN, NaN]))
 %!assert (NaN (2, 2, "like", complex (ones(2, 2))), [NaN, NaN; NaN, NaN])
-%!assert (NaN (3, 3, "like", single (1)), single ([NaN, NaN, NaN; NaN, NaN, NaN; NaN, NaN, NaN]))
+%!assert (NaN (3, 3, "like", single (1)),
+%!        single ([NaN, NaN, NaN; NaN, NaN, NaN; NaN, NaN, NaN]))
 %!assert (NaN (2, "like", single (1i)), single ([NaN, NaN; NaN, NaN]))
 %!assert (NaN (2, 2, "like", speye (2)), sparse ([NaN, NaN; NaN, NaN]))
 
@@ -4794,15 +4890,19 @@
 %!error NaN (3, 4, 5, "int8")
 %!error <input .* floating> NaN (3, 3, "like", true)
 %!error <input .* floating> NaN (2, "like", uint8 (1))
+%!error <must be scalar> NaN (1:3, 1)
+%!error <must be scalar> NaN (1, 1:3)
+%!error <must be scalar> NaN (1, 2, 1:3)
+%!error <must be scalar> NaN (1:3, 1, "like", single (1))
 */
 
 DEFUN (e, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} e
-@deftypefnx {} {} e (@var{n})
-@deftypefnx {} {} e (@var{n}, @var{m})
-@deftypefnx {} {} e (@var{n}, @var{m}, @var{k}, @dots{})
-@deftypefnx {} {} e (@dots{}, @var{class})
+@deftypefn  {} {@var{A} =} e
+@deftypefnx {} {@var{A} =} e (@var{n})
+@deftypefnx {} {@var{A} =} e (@var{n}, @var{m})
+@deftypefnx {} {@var{A} =} e (@var{n}, @var{m}, @var{k}, @dots{})
+@deftypefnx {} {@var{A} =} e (@dots{}, @var{class})
 Return a scalar, matrix, or N-dimensional array whose elements are all equal
 to the base of natural logarithms.
 
@@ -4816,15 +4916,15 @@
 
 When called with no arguments, return a scalar with the value @math{e}.
 
-When called with a single argument, return a square matrix with the
-dimension specified.
+When called with a single argument, return a square matrix with the dimension
+specified.
 
 When called with more than one scalar argument the first two arguments are
 taken as the number of rows and columns and any further arguments specify
 additional matrix dimensions.
 
-The optional argument @var{class} specifies the return type and may be
-either @qcode{"double"} or @qcode{"single"}.
+The optional argument @var{class} specifies the return type and may be either
+@qcode{"double"} or @qcode{"single"}.
 @seealso{log, exp, pi, I}
 @end deftypefn */)
 {
@@ -4864,11 +4964,11 @@
 
 DEFUN (eps, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} eps
-@deftypefnx {} {} eps (@var{x})
-@deftypefnx {} {} eps (@var{n}, @var{m})
-@deftypefnx {} {} eps (@var{n}, @var{m}, @var{k}, @dots{})
-@deftypefnx {} {} eps (@dots{}, @var{class})
+@deftypefn  {} {@var{d} =} eps
+@deftypefnx {} {@var{d} =} eps (@var{x})
+@deftypefnx {} {@var{d} =} eps (@var{n}, @var{m})
+@deftypefnx {} {@var{d} =} eps (@var{n}, @var{m}, @var{k}, @dots{})
+@deftypefnx {} {@var{d} =} eps (@dots{}, @var{class})
 Return a scalar, matrix or N-dimensional array whose elements are all eps,
 the machine precision.
 
@@ -4933,7 +5033,7 @@
 %!assert (eps (Inf), NaN)
 %!assert (eps (NaN), NaN)
 %!assert (eps ([1/2 1 2 realmax 0 realmin/2 realmin/16 Inf NaN]),
-%!             [2^(-53) 2^(-52) 2^(-51) 2^971 2^(-1074) 2^(-1074) 2^(-1074) NaN NaN])
+%!        [2^-53 2^-52 2^-51 2^971 2^-1074 2^-1074 2^-1074 NaN NaN])
 %!assert (eps (single (1/2)), single (2^(-24)))
 %!assert (eps (single (1)), single (2^(-23)))
 %!assert (eps (single (2)), single (2^(-22)))
@@ -4944,17 +5044,21 @@
 %!assert (eps (single (Inf)), single (NaN))
 %!assert (eps (single (NaN)), single (NaN))
 %!assert (eps (single ([1/2 1 2 realmax("single") 0 realmin("single")/2 realmin("single")/16 Inf NaN])),
-%!             single ([2^(-24) 2^(-23) 2^(-22) 2^104 2^(-149) 2^(-149) 2^(-149) NaN NaN]))
+%!        single ([2^-24 2^-23 2^-22 2^104 2^-149 2^-149 2^-149 NaN NaN]))
 %!error <X must be of a floating point type> eps (uint8 ([0 1 2]))
+%!error <must be scalar> eps (1:3, 1)
+%!error <must be scalar> eps (1, 1:3)
+%!error <must be scalar> eps (1, 2, 1:3)
+%!error <must be scalar> eps (1:3, 1, "single")
 */
 
 DEFUN (pi, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} pi
-@deftypefnx {} {} pi (@var{n})
-@deftypefnx {} {} pi (@var{n}, @var{m})
-@deftypefnx {} {} pi (@var{n}, @var{m}, @var{k}, @dots{})
-@deftypefnx {} {} pi (@dots{}, @var{class})
+@deftypefn  {} {@var{p} =} pi
+@deftypefnx {} {@var{p} =} pi (@var{n})
+@deftypefnx {} {@var{p} =} pi (@var{n}, @var{m})
+@deftypefnx {} {@var{p} =} pi (@var{n}, @var{m}, @var{k}, @dots{})
+@deftypefnx {} {@var{p} =} pi (@dots{}, @var{class})
 Return a scalar, matrix, or N-dimensional array whose elements are all equal
 to the ratio of the circumference of a circle to its
 @tex
@@ -4964,8 +5068,6 @@
 diameter.
 @end ifnottex
 
-Internally, @code{pi} is computed as @samp{4.0 * atan (1.0)}.
-
 When called with no arguments, return a scalar with the value of
 @tex
 $\pi$.
@@ -4974,15 +5076,15 @@
 pi.
 @end ifnottex
 
-When called with a single argument, return a square matrix with the
-dimension specified.
+When called with a single argument, return a square matrix with the dimension
+specified.
 
 When called with more than one scalar argument the first two arguments are
 taken as the number of rows and columns and any further arguments specify
 additional matrix dimensions.
 
-The optional argument @var{class} specifies the return type and may be
-either @qcode{"double"} or @qcode{"single"}.
+The optional argument @var{class} specifies the return type and may be either
+@qcode{"double"} or @qcode{"single"}.
 @seealso{e, I}
 @end deftypefn */)
 {
@@ -4997,11 +5099,11 @@
 
 DEFUN (realmax, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} realmax
-@deftypefnx {} {} realmax (@var{n})
-@deftypefnx {} {} realmax (@var{n}, @var{m})
-@deftypefnx {} {} realmax (@var{n}, @var{m}, @var{k}, @dots{})
-@deftypefnx {} {} realmax (@dots{}, @var{class})
+@deftypefn  {} {@var{Rmax} =} realmax
+@deftypefnx {} {@var{Rmax} =} realmax (@var{n})
+@deftypefnx {} {@var{Rmax} =} realmax (@var{n}, @var{m})
+@deftypefnx {} {@var{Rmax} =} realmax (@var{n}, @var{m}, @var{k}, @dots{})
+@deftypefnx {} {@var{Rmax} =} realmax (@dots{}, @var{class})
 Return a scalar, matrix, or N-dimensional array whose elements are all equal
 to the largest floating point number that is representable.
 
@@ -5036,16 +5138,16 @@
 
 DEFUN (realmin, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} realmin
-@deftypefnx {} {} realmin (@var{n})
-@deftypefnx {} {} realmin (@var{n}, @var{m})
-@deftypefnx {} {} realmin (@var{n}, @var{m}, @var{k}, @dots{})
-@deftypefnx {} {} realmin (@dots{}, @var{class})
+@deftypefn  {} {@var{Rmin} =} realmin
+@deftypefnx {} {@var{Rmin} =} realmin (@var{n})
+@deftypefnx {} {@var{Rmin} =} realmin (@var{n}, @var{m})
+@deftypefnx {} {@var{Rmin} =} realmin (@var{n}, @var{m}, @var{k}, @dots{})
+@deftypefnx {} {@var{Rmin} =} realmin (@dots{}, @var{class})
 Return a scalar, matrix, or N-dimensional array whose elements are all equal
 to the smallest normalized floating point number that is representable.
 
-The actual value is system dependent.  On machines that support
-IEEE floating point arithmetic, @code{realmin} is approximately
+The actual value is system dependent.  On machines that support IEEE floating
+point arithmetic, @code{realmin} is approximately
 @tex
 $2.2251\times10^{-308}$ for double precision and $1.1755\times10^{-38}$
 @end tex
@@ -5057,15 +5159,15 @@
 When called with no arguments, return a scalar with the value
 @code{realmin (@qcode{"double"})}.
 
-When called with a single argument, return a square matrix with the
-dimension specified.
+When called with a single argument, return a square matrix with the dimension
+specified.
 
 When called with more than one scalar argument the first two arguments are
 taken as the number of rows and columns and any further arguments specify
 additional matrix dimensions.
 
-The optional argument @var{class} specifies the return type and may be
-either @qcode{"double"} or @qcode{"single"}.
+The optional argument @var{class} specifies the return type and may be either
+@qcode{"double"} or @qcode{"single"}.
 @seealso{realmax, intmin, eps}
 @end deftypefn */)
 {
@@ -5080,11 +5182,11 @@
 @findex j
 @findex J
 
-@deftypefn  {} {} I
-@deftypefnx {} {} I (@var{n})
-@deftypefnx {} {} I (@var{n}, @var{m})
-@deftypefnx {} {} I (@var{n}, @var{m}, @var{k}, @dots{})
-@deftypefnx {} {} I (@dots{}, @var{class})
+@deftypefn  {} {@var{A} =} I
+@deftypefnx {} {@var{A} =} I (@var{n})
+@deftypefnx {} {@var{A} =} I (@var{n}, @var{m})
+@deftypefnx {} {@var{A} =} I (@var{n}, @var{m}, @var{k}, @dots{})
+@deftypefnx {} {@var{A} =} I (@dots{}, @var{class})
 Return a scalar, matrix, or N-dimensional array whose elements are all equal
 to the pure imaginary unit, defined as
 @tex
@@ -5188,6 +5290,9 @@
 
 %!error false (2, 3, "double")
 %!error <input .* logical> false (2, 1, "like", sparse (1))
+%!error <must be scalar> false (1:3, 1)
+%!error <must be scalar> false (1, 1:3)
+%!error <must be scalar> false (1, 2, 1:3)
 */
 
 DEFUN (true, args, ,
@@ -5220,6 +5325,9 @@
 
 %!error true (2, 3, "double")
 %!error <input .* logical> true (2, 1, "like", double (1))
+%!error <must be scalar> true (1:3, 1)
+%!error <must be scalar> true (1, 1:3)
+%!error <must be scalar> true (1, 2, 1:3)
 */
 
 template <typename MT>
@@ -5335,10 +5443,10 @@
 
 DEFUN (eye, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} eye (@var{n})
-@deftypefnx {} {} eye (@var{m}, @var{n})
-@deftypefnx {} {} eye ([@var{m} @var{n}])
-@deftypefnx {} {} eye (@dots{}, @var{class})
+@deftypefn  {} {@var{I} =} eye (@var{n})
+@deftypefnx {} {@var{I} =} eye (@var{m}, @var{n})
+@deftypefnx {} {@var{I} =} eye ([@var{m} @var{n}])
+@deftypefnx {} {@var{I} =} eye (@dots{}, @var{class})
 Return an identity matrix.
 
 If invoked with a single scalar argument @var{n}, return a square
@@ -5485,8 +5593,8 @@
 
 DEFUN (linspace, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} linspace (@var{start}, @var{end})
-@deftypefnx {} {} linspace (@var{start}, @var{end}, @var{n})
+@deftypefn  {} {@var{y} =} linspace (@var{start}, @var{end})
+@deftypefnx {} {@var{y} =} linspace (@var{start}, @var{end}, @var{n})
 Return a row vector with @var{n} linearly spaced elements between @var{start}
 and @var{end}.
 
@@ -5662,19 +5770,19 @@
 
 DEFUN (resize, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} resize (@var{x}, @var{m})
-@deftypefnx {} {} resize (@var{x}, @var{m}, @var{n}, @dots{})
-@deftypefnx {} {} resize (@var{x}, [@var{m} @var{n} @dots{}])
-Resize @var{x} cutting off elements as necessary.
+@deftypefn  {} {@var{B} =} resize (@var{A}, @var{m})
+@deftypefnx {} {@var{B} =} resize (@var{A}, @var{m}, @var{n}, @dots{})
+@deftypefnx {} {@var{B} =} resize (@var{A}, [@var{m} @var{n} @dots{}])
+Resize @var{A} cutting off elements as necessary.
 
 In the result, element with certain indices is equal to the corresponding
-element of @var{x} if the indices are within the bounds of @var{x};
-otherwise, the element is set to zero.
+element of @var{A} if the indices are within the bounds of @var{A}; otherwise,
+the element is set to zero.
 
 In other words, the statement
 
 @example
-y = resize (x, dv)
+B = resize (A, dv)
 @end example
 
 @noindent
@@ -5682,28 +5790,27 @@
 
 @example
 @group
-y = zeros (dv, class (x));
-sz = min (dv, size (x));
+B = zeros (dv, class (A));
+sz = min (dv, size (A));
 for i = 1:length (sz)
   idx@{i@} = 1:sz(i);
 endfor
-y(idx@{:@}) = x(idx@{:@});
+B(idx@{:@}) = A(idx@{:@});
 @end group
 @end example
 
 @noindent
 but is performed more efficiently.
 
-If only @var{m} is supplied, and it is a scalar, the dimension of the
-result is @var{m}-by-@var{m}.
-If @var{m}, @var{n}, @dots{} are all scalars, then the dimensions of
-the result are @var{m}-by-@var{n}-by-@dots{}.
-If given a vector as input, then the
-dimensions of the result are given by the elements of that vector.
-
-An object can be resized to more dimensions than it has;
-in such case the missing dimensions are assumed to be 1.
-Resizing an object to fewer dimensions is not possible.
+If only @var{m} is supplied, and it is a scalar, the dimension of the result is
+@var{m}-by-@var{m}.  If @var{m}, @var{n}, @dots{} are all scalars, then the
+dimensions of the result are @var{m}-by-@var{n}-by-@dots{}.  If given a vector
+as input, then the dimensions of the result are given by the elements of that
+vector.
+
+An object can be resized to more dimensions than it has; in such case the
+missing dimensions are assumed to be 1.  Resizing an object to fewer dimensions
+is not possible.
 @seealso{reshape, postpad, prepad, cat}
 @end deftypefn */)
 {
@@ -5752,10 +5859,10 @@
 
 DEFUN (reshape, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} reshape (@var{A}, @var{m}, @var{n}, @dots{})
-@deftypefnx {} {} reshape (@var{A}, [@var{m} @var{n} @dots{}])
-@deftypefnx {} {} reshape (@var{A}, @dots{}, [], @dots{})
-@deftypefnx {} {} reshape (@var{A}, @var{size})
+@deftypefn  {} {@var{B} =} reshape (@var{A}, @var{m}, @var{n}, @dots{})
+@deftypefnx {} {@var{B} =} reshape (@var{A}, [@var{m} @var{n} @dots{}])
+@deftypefnx {} {@var{B} =} reshape (@var{A}, @dots{}, [], @dots{})
+@deftypefnx {} {@var{B} =} reshape (@var{A}, @var{size})
 Return a matrix with the specified dimensions (@var{m}, @var{n}, @dots{})
 whose elements are taken from the matrix @var{A}.
 
@@ -5950,8 +6057,8 @@
 
 DEFUN (squeeze, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} squeeze (@var{x})
-Remove singleton dimensions from @var{x} and return the result.
+@deftypefn {} {@var{B} =} squeeze (@var{A})
+Remove singleton dimensions from @var{A} and return the result.
 
 Note that for compatibility with @sc{matlab}, all objects have
 a minimum of two dimensions and row vectors are left unchanged.
@@ -5968,7 +6075,7 @@
        doc: /* -*- texinfo -*-
 @deftypefn {} {@var{FM} =} full (@var{SM})
 Return a full storage matrix from a sparse, diagonal, or permutation matrix,
-or a range.
+or from a range.
 @seealso{sparse, issparse}
 @end deftypefn */)
 {
@@ -5982,9 +6089,9 @@
 
 DEFUN (norm, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} norm (@var{A})
-@deftypefnx {} {} norm (@var{A}, @var{p})
-@deftypefnx {} {} norm (@var{A}, @var{p}, @var{opt})
+@deftypefn  {} {@var{n} =} norm (@var{A})
+@deftypefnx {} {@var{n} =} norm (@var{A}, @var{p})
+@deftypefnx {} {@var{n} =} norm (@var{A}, @var{p}, @var{opt})
 Compute the p-norm of the matrix @var{A}.
 
 If the second argument is not given, @w{@code{p = 2}} is used.
@@ -6244,8 +6351,8 @@
 
 DEFUN (uplus, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} uplus (@var{x})
-This function and @w{@tcode{+ @var{x}}} are equivalent.
+@deftypefn {} {@var{B} =} uplus (@var{A})
+This function and @w{@tcode{+ @var{A}}} are equivalent.
 @seealso{uminus, plus}
 @end deftypefn */)
 {
@@ -6254,8 +6361,8 @@
 
 DEFUN (uminus, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} uminus (@var{x})
-This function and @w{@tcode{- @var{x}}} are equivalent.
+@deftypefn {} {@var{B} =} uminus (@var{A})
+This function and @w{@tcode{- @var{A}}} are equivalent.
 @seealso{uplus, minus}
 @end deftypefn */)
 {
@@ -6264,10 +6371,10 @@
 
 DEFUN (transpose, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} transpose (@var{x})
-Return the transpose of @var{x}.
-
-This function and @tcode{@var{x}.'@:} are equivalent.
+@deftypefn {} {@var{B} =} transpose (@var{A})
+Return the transpose of @var{A}.
+
+This function and @tcode{@var{A}.'@:} are equivalent.
 @seealso{ctranspose}
 @end deftypefn */)
 {
@@ -6296,10 +6403,10 @@
 
 DEFUN (ctranspose, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} ctranspose (@var{x})
-Return the complex conjugate transpose of @var{x}.
-
-This function and @tcode{@var{x}'} are equivalent.
+@deftypefn {} {@var{B} =} ctranspose (@var{A})
+Return the complex conjugate transpose of @var{A}.
+
+This function and @tcode{@var{A}'} are equivalent.
 @seealso{transpose}
 @end deftypefn */)
 {
@@ -6363,15 +6470,15 @@
 
 DEFUN (plus, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} plus (@var{x}, @var{y})
-@deftypefnx {} {} plus (@var{x1}, @var{x2}, @dots{})
-This function and @w{@tcode{@var{x} + @var{y}}} are equivalent.
+@deftypefn  {} {@var{C} =} plus (@var{A}, @var{B})
+@deftypefnx {} {@var{C} =} plus (@var{A1}, @var{A2}, @dots{})
+This function and @w{@tcode{@var{A} + @var{B}}} are equivalent.
 
 If more arguments are given, the summation is applied
 cumulatively from left to right:
 
 @example
-(@dots{}((@var{x1} + @var{x2}) + @var{x3}) + @dots{})
+(@dots{}((@var{A1} + @var{A2}) + @var{A3}) + @dots{})
 @end example
 
 @seealso{minus, uplus}
@@ -6394,8 +6501,8 @@
 
 DEFUN (minus, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} minus (@var{x}, @var{y})
-This function and @w{@tcode{@var{x} - @var{y}}} are equivalent.
+@deftypefn {} {@var{C} =} minus (@var{A}, @var{B})
+This function and @w{@tcode{@var{A} - @var{B}}} are equivalent.
 @seealso{plus, uminus}
 @end deftypefn */)
 {
@@ -6404,16 +6511,16 @@
 
 DEFUN (mtimes, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} mtimes (@var{x}, @var{y})
-@deftypefnx {} {} mtimes (@var{x1}, @var{x2}, @dots{})
+@deftypefn  {} {@var{C} =} mtimes (@var{A}, @var{B})
+@deftypefnx {} {@var{C} =} mtimes (@var{A1}, @var{A2}, @dots{})
 Return the matrix multiplication product of inputs.
 
-This function and @w{@tcode{@var{x} * @var{y}}} are equivalent.
+This function and @w{@tcode{@var{A} * @var{B}}} are equivalent.
 If more arguments are given, the multiplication is applied
 cumulatively from left to right:
 
 @example
-(@dots{}((@var{x1} * @var{x2}) * @var{x3}) * @dots{})
+(@dots{}((@var{A1} * @var{A2}) * @var{A3}) * @dots{})
 @end example
 
 @seealso{times, plus, minus, rdivide, mrdivide, mldivide, mpower}
@@ -6425,10 +6532,10 @@
 
 DEFUN (mrdivide, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} mrdivide (@var{x}, @var{y})
-Return the matrix right division of @var{x} and @var{y}.
-
-This function and @w{@tcode{@var{x} / @var{y}}} are equivalent.
+@deftypefn {} {@var{C} =} mrdivide (@var{A}, @var{B})
+Return the matrix right division of @var{A} and @var{B}.
+
+This function and @w{@tcode{@var{A} / @var{B}}} are equivalent.
 
 If the system is not square, or if the coefficient matrix is singular, a
 minimum norm solution is computed.
@@ -6440,10 +6547,10 @@
 
 DEFUN (mpower, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} mpower (@var{x}, @var{y})
-Return the matrix power operation of @var{x} raised to the @var{y} power.
-
-This function and @w{@tcode{@var{x} ^ @var{y}}} are equivalent.
+@deftypefn {} {@var{C} =} mpower (@var{A}, @var{B})
+Return the matrix power operation of @var{A} raised to the @var{B} power.
+
+This function and @w{@tcode{@var{A} ^ @var{B}}} are equivalent.
 @seealso{power, mtimes, plus, minus}
 @end deftypefn */)
 {
@@ -6452,10 +6559,10 @@
 
 DEFUN (mldivide, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} mldivide (@var{x}, @var{y})
-Return the matrix left division of @var{x} and @var{y}.
-
-This function and @w{@tcode{@var{x} @backslashchar{} @var{y}}} are equivalent.
+@deftypefn {} {@var{C} =} mldivide (@var{A}, @var{B})
+Return the matrix left division of @var{A} and @var{B}.
+
+This function and @w{@tcode{@var{A} @backslashchar{} @var{B}}} are equivalent.
 
 If the system is not square, or if the coefficient matrix is singular, a
 minimum norm solution is computed.
@@ -6467,8 +6574,8 @@
 
 DEFUN (lt, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} lt (@var{x}, @var{y})
-This function is equivalent to @w{@code{@var{x} < @var{y}}}.
+@deftypefn {} {@var{TF} =} lt (@var{A}, @var{B})
+This function is equivalent to @w{@code{@var{A} < @var{B}}}.
 @seealso{le, eq, ge, gt, ne}
 @end deftypefn */)
 {
@@ -6477,8 +6584,8 @@
 
 DEFUN (le, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} le (@var{x}, @var{y})
-This function is equivalent to @w{@code{@var{x} <= @var{y}}}.
+@deftypefn {} {@var{TF} =} le (@var{A}, @var{B})
+This function is equivalent to @w{@code{@var{A} <= @var{B}}}.
 @seealso{eq, ge, gt, ne, lt}
 @end deftypefn */)
 {
@@ -6487,10 +6594,10 @@
 
 DEFUN (eq, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} eq (@var{x}, @var{y})
+@deftypefn {} {@var{TF} =} eq (@var{A}, @var{B})
 Return true if the two inputs are equal.
 
-This function is equivalent to @w{@code{@var{x} == @var{y}}}.
+This function is equivalent to @w{@code{@var{A} == @var{B}}}.
 @seealso{ne, isequal, le, ge, gt, ne, lt}
 @end deftypefn */)
 {
@@ -6499,8 +6606,8 @@
 
 DEFUN (ge, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} ge (@var{x}, @var{y})
-This function is equivalent to @w{@code{@var{x} >= @var{y}}}.
+@deftypefn {} {@var{TF} =} ge (@var{A}, @var{B})
+This function is equivalent to @w{@code{@var{A} >= @var{B}}}.
 @seealso{le, eq, gt, ne, lt}
 @end deftypefn */)
 {
@@ -6509,8 +6616,8 @@
 
 DEFUN (gt, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} gt (@var{x}, @var{y})
-This function is equivalent to @w{@code{@var{x} > @var{y}}}.
+@deftypefn {} {@var{TF} =} gt (@var{A}, @var{B})
+This function is equivalent to @w{@code{@var{A} > @var{B}}}.
 @seealso{le, eq, ge, ne, lt}
 @end deftypefn */)
 {
@@ -6519,10 +6626,10 @@
 
 DEFUN (ne, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} ne (@var{x}, @var{y})
+@deftypefn {} {@var{TF} =} ne (@var{A}, @var{B})
 Return true if the two inputs are not equal.
 
-This function is equivalent to @w{@code{@var{x} != @var{y}}}.
+This function is equivalent to @w{@code{@var{A} != @var{B}}}.
 @seealso{eq, isequal, le, ge, lt}
 @end deftypefn */)
 {
@@ -6531,16 +6638,16 @@
 
 DEFUN (times, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} times (@var{x}, @var{y})
-@deftypefnx {} {} times (@var{x1}, @var{x2}, @dots{})
+@deftypefn  {} {@var{C} =} times (@var{A}, @var{B})
+@deftypefnx {} {@var{C} =} times (@var{A1}, @var{A2}, @dots{})
 Return the element-by-element multiplication product of inputs.
 
-This function and @w{@tcode{@var{x} .* @var{y}}} are equivalent.
+This function and @w{@tcode{@var{A} .* @var{B}}} are equivalent.
 If more arguments are given, the multiplication is applied
 cumulatively from left to right:
 
 @example
-(@dots{}((@var{x1} .* @var{x2}) .* @var{x3}) .* @dots{})
+(@dots{}((@var{A1} .* @var{A2}) .* @var{A3}) .* @dots{})
 @end example
 
 @seealso{mtimes, rdivide}
@@ -6552,10 +6659,10 @@
 
 DEFUN (rdivide, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} rdivide (@var{x}, @var{y})
-Return the element-by-element right division of @var{x} and @var{y}.
-
-This function and @w{@tcode{@var{x} ./ @var{y}}} are equivalent.
+@deftypefn {} {@var{C} =} rdivide (@var{A}, @var{B})
+Return the element-by-element right division of @var{A} and @var{B}.
+
+This function and @w{@tcode{@var{A} ./ @var{B}}} are equivalent.
 @seealso{ldivide, mrdivide, times, plus}
 @end deftypefn */)
 {
@@ -6564,11 +6671,11 @@
 
 DEFUN (power, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} power (@var{x}, @var{y})
-Return the element-by-element operation of @var{x} raised to the
-@var{y} power.
-
-This function and @w{@tcode{@var{x} .^ @var{y}}} are equivalent.
+@deftypefn {} {@var{C} =} power (@var{A}, @var{B})
+Return the element-by-element operation of @var{A} raised to the
+@var{B} power.
+
+This function and @w{@tcode{@var{A} .^ @var{B}}} are equivalent.
 
 If several complex results are possible, returns the one with smallest
 non-negative argument (angle).  Use @code{realpow}, @code{realsqrt},
@@ -6582,10 +6689,10 @@
 
 DEFUN (ldivide, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} ldivide (@var{x}, @var{y})
-Return the element-by-element left division of @var{x} and @var{y}.
-
-This function and @w{@tcode{@var{x} .@backslashchar{} @var{y}}} are
+@deftypefn {} {@var{C} =} ldivide (@var{A}, @var{B})
+Return the element-by-element left division of @var{A} and @var{B}.
+
+This function and @w{@tcode{@var{A} .@backslashchar{} @var{B}}} are
 equivalent.
 @seealso{rdivide, mldivide, times, plus}
 @end deftypefn */)
@@ -6595,8 +6702,8 @@
 
 DEFUN (and, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {@var{z} =} and (@var{x}, @var{y})
-@deftypefnx {} {@var{z} =} and (@var{x1}, @var{x2}, @dots{})
+@deftypefn  {} {@var{TF} =} and (@var{x}, @var{y})
+@deftypefnx {} {@var{TF} =} and (@var{x1}, @var{x2}, @dots{})
 Return the logical AND of @var{x} and @var{y}.
 
 This function is equivalent to the operator syntax
@@ -6616,8 +6723,8 @@
 
 DEFUN (or, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {@var{z} =} or (@var{x}, @var{y})
-@deftypefnx {} {@var{z} =} or (@var{x1}, @var{x2}, @dots{})
+@deftypefn  {} {@var{TF} =} or (@var{x}, @var{y})
+@deftypefnx {} {@var{TF} =} or (@var{x1}, @var{x2}, @dots{})
 Return the logical OR of @var{x} and @var{y}.
 
 This function is equivalent to the operator syntax
@@ -7007,16 +7114,26 @@
 
 ## Single
 %!assert (sort (single ([NaN, 1, -1, 2, Inf])), single ([-1, 1, 2, Inf, NaN]))
-%!assert (sort (single ([NaN, 1, -1, 2, Inf]), 1), single ([NaN, 1, -1, 2, Inf]))
-%!assert (sort (single ([NaN, 1, -1, 2, Inf]), 2), single ([-1, 1, 2, Inf, NaN]))
-%!assert (sort (single ([NaN, 1, -1, 2, Inf]), 3), single ([NaN, 1, -1, 2, Inf]))
-%!assert (sort (single ([NaN, 1, -1, 2, Inf]), "ascend"), single ([-1, 1, 2, Inf, NaN]))
-%!assert (sort (single ([NaN, 1, -1, 2, Inf]), 2, "ascend"), single ([-1, 1, 2, Inf, NaN]))
-%!assert (sort (single ([NaN, 1, -1, 2, Inf]), "descend"), single ([NaN, Inf, 2, 1, -1]))
-%!assert (sort (single ([NaN, 1, -1, 2, Inf]), 2, "descend"), single ([NaN, Inf, 2, 1, -1]))
-%!assert (sort (single ([3, 1, 7, 5; 8, 2, 6, 4])), single ([3, 1, 6, 4; 8, 2, 7, 5]))
-%!assert (sort (single ([3, 1, 7, 5; 8, 2, 6, 4]), 1), single ([3, 1, 6, 4; 8, 2, 7, 5]))
-%!assert (sort (single ([3, 1, 7, 5; 8, 2, 6, 4]), 2), single ([1, 3, 5, 7; 2, 4, 6, 8]))
+%!assert (sort (single ([NaN, 1, -1, 2, Inf]), 1),
+%!        single ([NaN, 1, -1, 2, Inf]))
+%!assert (sort (single ([NaN, 1, -1, 2, Inf]), 2),
+%!        single ([-1, 1, 2, Inf, NaN]))
+%!assert (sort (single ([NaN, 1, -1, 2, Inf]), 3),
+%!        single ([NaN, 1, -1, 2, Inf]))
+%!assert (sort (single ([NaN, 1, -1, 2, Inf]), "ascend"),
+%!        single ([-1, 1, 2, Inf, NaN]))
+%!assert (sort (single ([NaN, 1, -1, 2, Inf]), 2, "ascend"),
+%!        single ([-1, 1, 2, Inf, NaN]))
+%!assert (sort (single ([NaN, 1, -1, 2, Inf]), "descend"),
+%!        single ([NaN, Inf, 2, 1, -1]))
+%!assert (sort (single ([NaN, 1, -1, 2, Inf]), 2, "descend"),
+%!        single ([NaN, Inf, 2, 1, -1]))
+%!assert (sort (single ([3, 1, 7, 5; 8, 2, 6, 4])),
+%!        single ([3, 1, 6, 4; 8, 2, 7, 5]))
+%!assert (sort (single ([3, 1, 7, 5; 8, 2, 6, 4]), 1),
+%!        single ([3, 1, 6, 4; 8, 2, 7, 5]))
+%!assert (sort (single ([3, 1, 7, 5; 8, 2, 6, 4]), 2),
+%!        single ([1, 3, 5, 7; 2, 4, 6, 8]))
 %!assert (sort (single (1)), single (1))
 
 %!test
@@ -7026,16 +7143,26 @@
 
 ## Single Complex
 %!assert (sort (single ([NaN, 1i, -1, 2, Inf])), single ([1i, -1, 2, Inf, NaN]))
-%!assert (sort (single ([NaN, 1i, -1, 2, Inf]), 1), single ([NaN, 1i, -1, 2, Inf]))
-%!assert (sort (single ([NaN, 1i, -1, 2, Inf]), 2), single ([1i, -1, 2, Inf, NaN]))
-%!assert (sort (single ([NaN, 1i, -1, 2, Inf]), 3), single ([NaN, 1i, -1, 2, Inf]))
-%!assert (sort (single ([NaN, 1i, -1, 2, Inf]), "ascend"), single ([1i, -1, 2, Inf, NaN]))
-%!assert (sort (single ([NaN, 1i, -1, 2, Inf]), 2, "ascend"), single ([1i, -1, 2, Inf, NaN]))
-%!assert (sort (single ([NaN, 1i, -1, 2, Inf]), "descend"), single ([NaN, Inf, 2, -1, 1i]))
-%!assert (sort (single ([NaN, 1i, -1, 2, Inf]), 2, "descend"), single ([NaN, Inf, 2, -1, 1i]))
-%!assert (sort (single ([3, 1i, 7, 5; 8, 2, 6, 4])), single ([3, 1i, 6, 4; 8, 2, 7, 5]))
-%!assert (sort (single ([3, 1i, 7, 5; 8, 2, 6, 4]), 1), single ([3, 1i, 6, 4; 8, 2, 7, 5]))
-%!assert (sort (single ([3, 1i, 7, 5; 8, 2, 6, 4]), 2), single ([1i, 3, 5, 7; 2, 4, 6, 8]))
+%!assert (sort (single ([NaN, 1i, -1, 2, Inf]), 1),
+%!        single ([NaN, 1i, -1, 2, Inf]))
+%!assert (sort (single ([NaN, 1i, -1, 2, Inf]), 2),
+%!        single ([1i, -1, 2, Inf, NaN]))
+%!assert (sort (single ([NaN, 1i, -1, 2, Inf]), 3),
+%!        single ([NaN, 1i, -1, 2, Inf]))
+%!assert (sort (single ([NaN, 1i, -1, 2, Inf]), "ascend"),
+%!        single ([1i, -1, 2, Inf, NaN]))
+%!assert (sort (single ([NaN, 1i, -1, 2, Inf]), 2, "ascend"),
+%!        single ([1i, -1, 2, Inf, NaN]))
+%!assert (sort (single ([NaN, 1i, -1, 2, Inf]), "descend"),
+%!        single ([NaN, Inf, 2, -1, 1i]))
+%!assert (sort (single ([NaN, 1i, -1, 2, Inf]), 2, "descend"),
+%!        single ([NaN, Inf, 2, -1, 1i]))
+%!assert (sort (single ([3, 1i, 7, 5; 8, 2, 6, 4])),
+%!        single ([3, 1i, 6, 4; 8, 2, 7, 5]))
+%!assert (sort (single ([3, 1i, 7, 5; 8, 2, 6, 4]), 1),
+%!        single ([3, 1i, 6, 4; 8, 2, 7, 5]))
+%!assert (sort (single ([3, 1i, 7, 5; 8, 2, 6, 4]), 2),
+%!        single ([1i, 3, 5, 7; 2, 4, 6, 8]))
 %!assert (sort (single (1i)), single (1i))
 
 %!test
@@ -7048,10 +7175,14 @@
 %!assert (sort ([true, false, true, false], 1), [true, false, true, false])
 %!assert (sort ([true, false, true, false], 2), [false, false, true, true])
 %!assert (sort ([true, false, true, false], 3), [true, false, true, false])
-%!assert (sort ([true, false, true, false], "ascend"), [false, false, true, true])
-%!assert (sort ([true, false, true, false], 2, "ascend"), [false, false, true, true])
-%!assert (sort ([true, false, true, false], "descend"), [true, true, false, false])
-%!assert (sort ([true, false, true, false], 2, "descend"), [true, true, false, false])
+%!assert (sort ([true, false, true, false], "ascend"),
+%!        [false, false, true, true])
+%!assert (sort ([true, false, true, false], 2, "ascend"),
+%!        [false, false, true, true])
+%!assert (sort ([true, false, true, false], "descend"),
+%!        [true, true, false, false])
+%!assert (sort ([true, false, true, false], 2, "descend"),
+%!        [true, true, false, false])
 %!assert (sort (true), true)
 
 %!test
@@ -7060,14 +7191,22 @@
 %! assert (i, [2, 4, 1, 3]);
 
 ## Sparse Double
-%!assert (sort (sparse ([0, NaN, 1, 0, -1, 2, Inf])), sparse ([-1, 0, 0, 1, 2, Inf, NaN]))
-%!assert (sort (sparse ([0, NaN, 1, 0, -1, 2, Inf]), 1), sparse ([0, NaN, 1, 0, -1, 2, Inf]))
-%!assert (sort (sparse ([0, NaN, 1, 0, -1, 2, Inf]), 2), sparse ([-1, 0, 0, 1, 2, Inf, NaN]))
-%!assert (sort (sparse ([0, NaN, 1, 0, -1, 2, Inf]), 3), sparse ([0, NaN, 1, 0, -1, 2, Inf]))
-%!assert (sort (sparse ([0, NaN, 1, 0, -1, 2, Inf]), "ascend"), sparse ([-1, 0, 0, 1, 2, Inf, NaN]))
-%!assert (sort (sparse ([0, NaN, 1, 0, -1, 2, Inf]), 2, "ascend"), sparse ([-1, 0, 0, 1, 2, Inf, NaN]))
-%!assert (sort (sparse ([0, NaN, 1, 0, -1, 2, Inf]), "descend"), sparse ([NaN, Inf, 2, 1, 0, 0, -1]))
-%!assert (sort (sparse ([0, NaN, 1, 0, -1, 2, Inf]), 2, "descend"), sparse ([NaN, Inf, 2, 1, 0, 0, -1]))
+%!assert (sort (sparse ([0, NaN, 1, 0, -1, 2, Inf])),
+%!        sparse ([-1, 0, 0, 1, 2, Inf, NaN]))
+%!assert (sort (sparse ([0, NaN, 1, 0, -1, 2, Inf]), 1),
+%!        sparse ([0, NaN, 1, 0, -1, 2, Inf]))
+%!assert (sort (sparse ([0, NaN, 1, 0, -1, 2, Inf]), 2),
+%!        sparse ([-1, 0, 0, 1, 2, Inf, NaN]))
+%!assert (sort (sparse ([0, NaN, 1, 0, -1, 2, Inf]), 3),
+%!        sparse ([0, NaN, 1, 0, -1, 2, Inf]))
+%!assert (sort (sparse ([0, NaN, 1, 0, -1, 2, Inf]), "ascend"),
+%!        sparse ([-1, 0, 0, 1, 2, Inf, NaN]))
+%!assert (sort (sparse ([0, NaN, 1, 0, -1, 2, Inf]), 2, "ascend"),
+%!        sparse ([-1, 0, 0, 1, 2, Inf, NaN]))
+%!assert (sort (sparse ([0, NaN, 1, 0, -1, 2, Inf]), "descend"),
+%!        sparse ([NaN, Inf, 2, 1, 0, 0, -1]))
+%!assert (sort (sparse ([0, NaN, 1, 0, -1, 2, Inf]), 2, "descend"),
+%!        sparse ([NaN, Inf, 2, 1, 0, 0, -1]))
 
 %!shared a
 %! a = randn (10, 10);
@@ -7082,14 +7221,22 @@
 %! assert (is, i);
 
 ## Sparse Complex
-%!assert (sort (sparse ([0, NaN, 1i, 0, -1, 2, Inf])), sparse ([0, 0, 1i, -1, 2, Inf, NaN]))
-%!assert (sort (sparse ([0, NaN, 1i, 0, -1, 2, Inf]), 1), sparse ([0, NaN, 1i, 0, -1, 2, Inf]))
-%!assert (sort (sparse ([0, NaN, 1i, 0, -1, 2, Inf]), 2), sparse ([0, 0, 1i, -1, 2, Inf, NaN]))
-%!assert (sort (sparse ([0, NaN, 1i, 0, -1, 2, Inf]), 3), sparse ([0, NaN, 1i, 0, -1, 2, Inf]))
-%!assert (sort (sparse ([0, NaN, 1i, 0, -1, 2, Inf]), "ascend"), sparse ([0, 0, 1i, -1, 2, Inf, NaN]))
-%!assert (sort (sparse ([0, NaN, 1i, 0, -1, 2, Inf]), 2, "ascend"), sparse ([0, 0, 1i, -1, 2, Inf, NaN]))
-%!assert (sort (sparse ([0, NaN, 1i, 0, -1, 2, Inf]), "descend"), sparse ([NaN, Inf, 2, -1, 1i, 0, 0]))
-%!assert (sort (sparse ([0, NaN, 1i, 0, -1, 2, Inf]), 2, "descend"), sparse ([NaN, Inf, 2, -1, 1i, 0, 0]))
+%!assert (sort (sparse ([0, NaN, 1i, 0, -1, 2, Inf])),
+%!        sparse ([0, 0, 1i, -1, 2, Inf, NaN]))
+%!assert (sort (sparse ([0, NaN, 1i, 0, -1, 2, Inf]), 1),
+%!        sparse ([0, NaN, 1i, 0, -1, 2, Inf]))
+%!assert (sort (sparse ([0, NaN, 1i, 0, -1, 2, Inf]), 2),
+%!        sparse ([0, 0, 1i, -1, 2, Inf, NaN]))
+%!assert (sort (sparse ([0, NaN, 1i, 0, -1, 2, Inf]), 3),
+%!        sparse ([0, NaN, 1i, 0, -1, 2, Inf]))
+%!assert (sort (sparse ([0, NaN, 1i, 0, -1, 2, Inf]), "ascend"),
+%!        sparse ([0, 0, 1i, -1, 2, Inf, NaN]))
+%!assert (sort (sparse ([0, NaN, 1i, 0, -1, 2, Inf]), 2, "ascend"),
+%!        sparse ([0, 0, 1i, -1, 2, Inf, NaN]))
+%!assert (sort (sparse ([0, NaN, 1i, 0, -1, 2, Inf]), "descend"),
+%!        sparse ([NaN, Inf, 2, -1, 1i, 0, 0]))
+%!assert (sort (sparse ([0, NaN, 1i, 0, -1, 2, Inf]), 2, "descend"),
+%!        sparse ([NaN, Inf, 2, -1, 1i, 0, 0]))
 
 %!shared a
 %! a = randn (10, 10);
@@ -7105,14 +7252,22 @@
 %! assert (is, i);
 
 ## Sparse Bool
-%!assert (sort (sparse ([true, false, true, false])), sparse ([false, false, true, true]))
-%!assert (sort (sparse ([true, false, true, false]), 1), sparse ([true, false, true, false]))
-%!assert (sort (sparse ([true, false, true, false]), 2), sparse ([false, false, true, true]))
-%!assert (sort (sparse ([true, false, true, false]), 3), sparse ([true, false, true, false]))
-%!assert (sort (sparse ([true, false, true, false]), "ascend"), sparse ([false, false, true, true]))
-%!assert (sort (sparse ([true, false, true, false]), 2, "ascend"), sparse ([false, false, true, true]))
-%!assert (sort (sparse ([true, false, true, false]), "descend"), sparse ([true, true, false, false]))
-%!assert (sort (sparse ([true, false, true, false]), 2, "descend"), sparse ([true, true, false, false]))
+%!assert (sort (sparse ([true, false, true, false])),
+%!        sparse ([false, false, true, true]))
+%!assert (sort (sparse ([true, false, true, false]), 1),
+%!        sparse ([true, false, true, false]))
+%!assert (sort (sparse ([true, false, true, false]), 2),
+%!        sparse ([false, false, true, true]))
+%!assert (sort (sparse ([true, false, true, false]), 3),
+%!        sparse ([true, false, true, false]))
+%!assert (sort (sparse ([true, false, true, false]), "ascend"),
+%!        sparse ([false, false, true, true]))
+%!assert (sort (sparse ([true, false, true, false]), 2, "ascend"),
+%!        sparse ([false, false, true, true]))
+%!assert (sort (sparse ([true, false, true, false]), "descend"),
+%!        sparse ([true, true, false, false]))
+%!assert (sort (sparse ([true, false, true, false]), 2, "descend"),
+%!        sparse ([true, true, false, false]))
 
 %!test
 %! [v, i] = sort (sparse ([true, false, true, false]));
@@ -7145,13 +7300,12 @@
 // specified by @var{mode}, which can either be 'ascend' or 'descend'
 // and return the index vector corresponding to the sort order.
 //
-// This function does not yet support sparse matrices.
-
-// FIXME: Is this function used anymore?  12/14/2015
+// FIXME: This function does not yet support sparse matrices.
+
 DEFUN (__sort_rows_idx__, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} __sort_rows_idx__ (@var{a}, @var{mode})
-Undocumented internal function.
+@deftypefn {} {@var{idx} =} __sort_rows_idx__ (@var{A}, @var{mode})
+Called internally from @file{sortrows.m}.
 @end deftypefn */)
 {
   int nargin = args.length ();
@@ -7212,17 +7366,17 @@
 
 DEFUN (issorted, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} issorted (@var{a})
-@deftypefnx {} {} issorted (@var{a}, @var{mode})
-@deftypefnx {} {} issorted (@var{a}, "rows", @var{mode})
-Return true if the array is sorted according to @var{mode}, which may be either
-@qcode{"ascend"}, @qcode{"descend"}, or @qcode{"either"}.
+@deftypefn  {} {@var{tf} =} issorted (@var{A})
+@deftypefnx {} {@var{tf} =} issorted (@var{A}, @var{mode})
+@deftypefnx {} {@var{tf} =} issorted (@var{A}, "rows", @var{mode})
+Return true if the vector @var{A} is sorted according to @var{mode}, which
+may be either @qcode{"ascend"}, @qcode{"descend"}, or @qcode{"either"}.
 
 By default, @var{mode} is @qcode{"ascend"}.  NaNs are treated in the same
 manner as @code{sort}.
 
-If the optional argument @qcode{"rows"} is supplied, check whether the array is
-sorted by rows as output by the function @code{sortrows} (with no options).
+If the optional argument @qcode{"rows"} is supplied, check whether the matrix
+is sorted by rows as output by the function @code{sortrows} (with no options).
 
 This function does not support sparse matrices.
 @seealso{sort, sortrows}
@@ -7341,8 +7495,8 @@
 
 DEFUN (nth_element, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} nth_element (@var{x}, @var{n})
-@deftypefnx {} {} nth_element (@var{x}, @var{n}, @var{dim})
+@deftypefn  {} {@var{nel} =} nth_element (@var{x}, @var{n})
+@deftypefnx {} {@var{nel} =} nth_element (@var{x}, @var{n}, @var{dim})
 Select the n-th smallest element of a vector, using the ordering defined by
 @code{sort}.
 
@@ -7562,7 +7716,7 @@
 }
 
 static octave_value_list
-do_accumarray_minmax_fun (const octave_value_list& args,
+do_accumarray_minmax_fcn (const octave_value_list& args,
                           bool ismin)
 {
   int nargin = args.length ();
@@ -7637,7 +7791,7 @@
     }
   catch (const index_exception& ie)
     {
-      error ("do_accumarray_minmax_fun: invalid index %s", ie.what ());
+      error ("do_accumarray_minmax_fcn: invalid index %s", ie.what ());
     }
 
   return retval;
@@ -7649,7 +7803,7 @@
 Undocumented internal function.
 @end deftypefn */)
 {
-  return do_accumarray_minmax_fun (args, true);
+  return do_accumarray_minmax_fcn (args, true);
 }
 
 DEFUN (__accumarray_max__, args, ,
@@ -7658,7 +7812,7 @@
 Undocumented internal function.
 @end deftypefn */)
 {
-  return do_accumarray_minmax_fun (args, false);
+  return do_accumarray_minmax_fcn (args, false);
 }
 
 template <typename NDT>
@@ -7816,8 +7970,8 @@
 
 DEFUN (merge, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} merge (@var{mask}, @var{tval}, @var{fval})
-@deftypefnx {} {} ifelse (@var{mask}, @var{tval}, @var{fval})
+@deftypefn  {} {@var{M} =} merge (@var{mask}, @var{tval}, @var{fval})
+@deftypefnx {} {@var{M} =} ifelse (@var{mask}, @var{tval}, @var{fval})
 Merge elements of @var{true_val} and @var{false_val}, depending on the
 value of @var{mask}.
 
@@ -7935,7 +8089,7 @@
           idx_vector col1 (':'), col2 (':'), sl1 (1, k), sl2 (0, k-1);
           retval = SparseT (retval.index (col1, sl1))
                    - SparseT (retval.index (col2, sl2));
-          assert (retval.columns () == k-1);
+          error_unless (retval.columns () == k-1);
           order--;
           k--;
         }
@@ -7948,7 +8102,7 @@
           idx_vector col1 (':'), col2 (':'), sl1 (1, k), sl2 (0, k-1);
           retval = SparseT (retval.index (sl1, col1))
                    - SparseT (retval.index (sl2, col2));
-          assert (retval.rows () == k-1);
+          error_unless (retval.rows () == k-1);
           order--;
           k--;
         }
@@ -8047,9 +8201,9 @@
 
 DEFUN (diff, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} diff (@var{x})
-@deftypefnx {} {} diff (@var{x}, @var{k})
-@deftypefnx {} {} diff (@var{x}, @var{k}, @var{dim})
+@deftypefn  {} {@var{y} =} diff (@var{x})
+@deftypefnx {} {@var{y} =} diff (@var{x}, @var{k})
+@deftypefnx {} {@var{y} =} diff (@var{x}, @var{k}, @var{dim})
 If @var{x} is a vector of length @math{n}, @w{@code{diff (@var{x})}} is the
 vector of first differences
 @tex
@@ -8128,7 +8282,8 @@
 {
   Array<T> retval;
 
-  assert (rep.ndims () == 2 && rep.rows () == 2);
+  if (rep.ndims () != 2 || rep.rows () != 2)
+    error ("repelems: R must be a 2-row, N-column matrix of integers");
 
   octave_idx_type n = rep.columns ();
   octave_idx_type l = 0;
@@ -8156,7 +8311,7 @@
 
 DEFUN (repelems, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} repelems (@var{x}, @var{r})
+@deftypefn {} {@var{y} =} repelems (@var{x}, @var{r})
 Construct a vector of repeated elements from @var{x}.
 
 @var{r} is a 2x@var{N} integer matrix specifying which elements to repeat
--- a/libinterp/corefcn/debug.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/debug.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -78,13 +78,13 @@
 
 DEFMETHOD (dbstop, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn  {} {} dbstop @var{func}
-@deftypefnx {} {} dbstop @var{func} @var{line}
-@deftypefnx {} {} dbstop @var{func} @var{line1} @var{line2} @dots{}
+@deftypefn  {} {} dbstop @var{fcn}
+@deftypefnx {} {} dbstop @var{fcn} @var{line}
+@deftypefnx {} {} dbstop @var{fcn} @var{line1} @var{line2} @dots{}
 @deftypefnx {} {} dbstop @var{line1} @dots{}
-@deftypefnx {} {} dbstop in @var{func}
-@deftypefnx {} {} dbstop in @var{func} at @var{line}
-@deftypefnx {} {} dbstop in @var{func} at @var{line} if "@var{condition}"
+@deftypefnx {} {} dbstop in @var{fcn}
+@deftypefnx {} {} dbstop in @var{fcn} at @var{line}
+@deftypefnx {} {} dbstop in @var{fcn} at @var{line} if "@var{condition}"
 @deftypefnx {} {} dbstop in @var{class} at @var{method}
 @deftypefnx {} {} dbstop if @var{event}
 @deftypefnx {} {} dbstop if @var{event} @var{ID}
@@ -93,16 +93,16 @@
 
 Set breakpoints for the built-in debugger.
 
-@var{func} is the name of a function on the current @code{path}.  When
-already in debug mode the @var{func} argument can be omitted and the current
+@var{fcn} is the name of a function on the current @code{path}.  When
+already in debug mode the @var{fcn} argument can be omitted and the current
 function will be used.  Breakpoints at subfunctions are set with the scope
 operator @samp{>}.  For example, If @file{file.m} has a subfunction
-@code{func2}, then a breakpoint in @code{func2} can be specified by
-@code{file>func2}.
+@code{fcn2}, then a breakpoint in @code{fcn2} can be specified by
+@code{file>fcn2}.
 
 @var{line} is the line number at which to break.  If @var{line} is not
 specified, it defaults to the first executable line in the file
-@file{func.m}.  Multiple lines can be specified in a single command; when
+@file{fcn.m}.  Multiple lines can be specified in a single command; when
 function syntax is used, the lines may also be passed as a single vector
 argument (@code{[@var{line1}, @var{line2}, @dots{}]}).
 
@@ -111,24 +111,24 @@
 @var{condition} will be evaluated, and execution will stop if
 @var{condition} is true.  If @var{condition} cannot be evaluated, for
 example because it refers to an undefined variable, an error will be thrown.
- Expressions with side effects (such as @code{y++ > 1}) will alter
-variables, and should generally be avoided.  Conditions containing quotes
-(@samp{"}, @samp{'}) or comment characters (@samp{#}, @samp{%}) must be
-enclosed in quotes.  (This does not apply to conditions entered from the
-editor's context menu.)  For example:
+Expressions with side effects (such as @code{y++ > 1}) will alter variables,
+and should generally be avoided.  Conditions containing quotes (@samp{"},
+@samp{'}) or comment characters (@samp{#}, @samp{%}) must be enclosed in
+quotes.  (This does not apply to conditions entered from the editor's context
+menu.)  For example:
 
 @example
 dbstop in axis at 246 if 'any (opt == "x")'
 @end example
 
-The form specifying @var{event} does not cause a specific breakpoint at a
-given function and line number.  Instead it causes debug mode to be entered
-when certain unexpected events are encountered.  Possible values are
+The form specifying @var{event} does not cause a specific breakpoint at a given
+function and line number.  Instead it causes debug mode to be entered when
+certain unexpected events are encountered.  Possible values are
 
 @table @code
 @item error
-Stop when an error is reported.  This is equivalent to specifying
-both @code{debug_on_error (true)} and @code{debug_on_interrupt (true)}.
+Stop when an error is reported.  This is equivalent to specifying both
+@code{debug_on_error (true)} and @code{debug_on_interrupt (true)}.
 
 @item caught error
 Stop when an error is caught by a try-catch block (not yet implemented).
@@ -145,10 +145,9 @@
 @end table
 
 The events @code{error}, @code{caught error}, and @code{warning} can all be
-followed by a string specifying an error ID or warning ID@.  If that is
-done, only errors with the specified ID will cause execution to stop.  To
-stop on one of a set of IDs, multiple @code{dbstop} commands must be
-issued.
+followed by a string specifying an error ID or warning ID@.  If that is done,
+only errors with the specified ID will cause execution to stop.  To stop on one
+of a set of IDs, multiple @code{dbstop} commands must be issued.
 
 Breakpoints and events can be removed using the @code{dbclear} command with
 the same syntax.
@@ -158,11 +157,11 @@
 
 The optional output @var{rline} is the real line number where the breakpoint
 was set.  This can differ from the specified line if the line is not
-executable.  For example, if a breakpoint attempted on a blank line then
-Octave will set the real breakpoint at the next executable line.
+executable.  For example, if a breakpoint attempted on a blank line then Octave
+will set the real breakpoint at the next executable line.
 
-When a file is re-parsed, such as when it is modified outside the GUI,
-all breakpoints within the file are cleared.
+When a file is re-parsed, such as when it is modified outside the GUI, all
+breakpoints within the file are cleared.
 
 @seealso{dbclear, dbstatus, dbstep, debug_on_error, debug_on_warning,
 debug_on_interrupt}
@@ -256,26 +255,26 @@
 
 DEFMETHOD (dbclear, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn  {} {} dbclear @var{func}
-@deftypefnx {} {} dbclear @var{func} @var{line}
-@deftypefnx {} {} dbclear @var{func} @var{line1} @var{line2} @dots{}
+@deftypefn  {} {} dbclear @var{fcn}
+@deftypefnx {} {} dbclear @var{fcn} @var{line}
+@deftypefnx {} {} dbclear @var{fcn} @var{line1} @var{line2} @dots{}
 @deftypefnx {} {} dbclear @var{line} @dots{}
 @deftypefnx {} {} dbclear all
-@deftypefnx {} {} dbclear in @var{func}
-@deftypefnx {} {} dbclear in @var{func} at @var{line}
+@deftypefnx {} {} dbclear in @var{fcn}
+@deftypefnx {} {} dbclear in @var{fcn} at @var{line}
 @deftypefnx {} {} dbclear if @var{event}
-@deftypefnx {} {} dbclear ("@var{func}")
-@deftypefnx {} {} dbclear ("@var{func}", @var{line})
-@deftypefnx {} {} dbclear ("@var{func}", @var{line1}, @var{line2}, @dots{})
-@deftypefnx {} {} dbclear ("@var{func}", @var{line1}, @dots{})
+@deftypefnx {} {} dbclear ("@var{fcn}")
+@deftypefnx {} {} dbclear ("@var{fcn}", @var{line})
+@deftypefnx {} {} dbclear ("@var{fcn}", @var{line1}, @var{line2}, @dots{})
+@deftypefnx {} {} dbclear ("@var{fcn}", @var{line1}, @dots{})
 @deftypefnx {} {} dbclear (@var{line}, @dots{})
 @deftypefnx {} {} dbclear ("all")
-Delete a breakpoint at line number @var{line} in the function @var{func}.
+Delete a breakpoint at line number @var{line} in the function @var{fcn}.
 
 Arguments are
 
 @table @var
-@item func
+@item fcn
 Function name as a string variable.  When already in debug mode this
 argument can be omitted and the current function will be used.
 
@@ -332,7 +331,7 @@
 DEFMETHOD (dbstatus, interp, args, nargout,
            doc: /* -*- texinfo -*-
 @deftypefn  {} {} dbstatus
-@deftypefnx {} {} dbstatus @var{func}
+@deftypefnx {} {} dbstatus @var{fcn}
 @deftypefnx {} {@var{bp_list} =} dbstatus @dots{}
 Report the location of active breakpoints.
 
@@ -340,16 +339,16 @@
 functions with breakpoints and the line numbers where those breakpoints are
 set.
 
-If a function name @var{func} is specified then only report breakpoints
+If a function name @var{fcn} is specified then only report breakpoints
 for the named function and its subfunctions.
 
 The optional return argument @var{bp_list} is a struct array with the
-following fields.
+following fields:
 
 @table @asis
 @item name
-The name of the function with a breakpoint.  A subfunction, say @code{func2}
-within an m-file, say @file{file.m}, is specified as @code{file>func2}.
+The name of the function with a breakpoint.  A subfunction, say @code{fcn2}
+within an m-file, say @file{file.m}, is specified as @code{file>fcn2}.
 
 @item file
 The name of the m-file where the function code is located.
@@ -484,9 +483,9 @@
       for (const auto& fnm_bp_p : bp_list)
         {
           std::string filename = fnm_bp_p.first;
-          const char *sub_fun = strchr (filename.c_str (), '>');
-          if (sub_fun)
-            filename = filename.substr(0, sub_fun - filename.c_str ());
+          const char *sub_fcn = strchr (filename.c_str (), '>');
+          if (sub_fcn)
+            filename = filename.substr(0, sub_fcn - filename.c_str ());
           octave_value path_name;
           path_name
             = octave::sys::canonicalize_file_name (help_sys.which (filename));
@@ -529,12 +528,12 @@
 %!test
 %! if (isguirunning ())
 %!   orig_show_dbg = __event_manager_gui_preference__ ("editor/show_dbg_file",
-%!                                                   "0");
+%!                                                     "0");
 %! endif
 %! unwind_protect
 %!   dbclear all;   # Clear out breakpoints before test
 %!   dbstop @ftp/dir;
-%!   dbstop @audioplayer/set 70;
+%!   dbstop @audioplayer/set 75;
 %!   dbstop quantile>__quantile__;
 %!   dbstop ls;
 %!   s = dbstatus;
@@ -603,10 +602,10 @@
 @deftypefnx {} {} dbtype @var{lineno}
 @deftypefnx {} {} dbtype @var{startl:endl}
 @deftypefnx {} {} dbtype @var{startl:end}
-@deftypefnx {} {} dbtype @var{func}
-@deftypefnx {} {} dbtype @var{func} @var{lineno}
-@deftypefnx {} {} dbtype @var{func} @var{startl:endl}
-@deftypefnx {} {} dbtype @var{func} @var{startl:end}
+@deftypefnx {} {} dbtype @var{fcn}
+@deftypefnx {} {} dbtype @var{fcn} @var{lineno}
+@deftypefnx {} {} dbtype @var{fcn} @var{startl:endl}
+@deftypefnx {} {} dbtype @var{fcn} @var{startl:end}
 Display a script file with line numbers.
 
 When called with no arguments in debugging mode, display the script file
@@ -640,7 +639,7 @@
 
       break;
 
-    case 1:  // (dbtype start:end) || (dbtype func) || (dbtype lineno)
+    case 1:  // (dbtype start:end) || (dbtype fcn) || (dbtype lineno)
       {
         std::string arg = argv[1];
 
@@ -672,11 +671,11 @@
                            start, end);
               }
           }
-        else  // (dbtype func) || (dbtype lineno)
+        else  // (dbtype fcn) || (dbtype lineno)
           {
             int line = atoi (arg.c_str ());
 
-            if (line == 0)  // (dbtype func)
+            if (line == 0)  // (dbtype fcn)
               {
                 dbg_fcn = tw.get_user_code (arg);
 
@@ -701,7 +700,7 @@
       }
       break;
 
-    case 2:  // (dbtype func start:end) || (dbtype func start)
+    case 2:  // (dbtype fcn start:end) || (dbtype fcn start)
       {
         dbg_fcn = tw.get_user_code (argv[1]);
 
@@ -940,7 +939,7 @@
 void
 show_octave_dbstack (void)
 {
-  do_dbstack (octave::__get_interpreter__ ("show_octave_dbstack"),
+  do_dbstack (octave::__get_interpreter__ (),
               octave_value_list (), 0, std::cerr);
 }
 
@@ -1171,7 +1170,7 @@
 
 DEFMETHOD (isdebugmode, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} isdebugmode ()
+@deftypefn {} {@var{tf} =} isdebugmode ()
 Return true if in debugging mode, otherwise false.
 @seealso{dbwhere, dbstack, dbstatus}
 @end deftypefn */)
--- a/libinterp/corefcn/defaults.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/defaults.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -450,8 +450,9 @@
 
 DEFUN (OCTAVE_HOME, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} OCTAVE_HOME ()
+@deftypefn {} {@var{dir} =} OCTAVE_HOME ()
 Return the name of the top-level Octave installation directory.
+
 OCTAVE_HOME corresponds to the configuration variable @var{prefix}.
 @seealso{EXEC_PATH, IMAGE_PATH, OCTAVE_EXEC_HOME}
 @end deftypefn */)
@@ -469,11 +470,12 @@
 
 DEFUN (OCTAVE_EXEC_HOME, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} OCTAVE_EXEC_HOME ()
+@deftypefn {} {@var{dir} =} OCTAVE_EXEC_HOME ()
 Return the name of the top-level Octave installation directory for
-architecture-dependent files.  If not specified separately, the value
-is the same as OCTAVE_HOME@.  OCTAVE_EXEC_HOME corresponds to the
-configuration variable @var{exec_prefix}.
+architecture-dependent files.
+
+If not specified separately, the value is the same as OCTAVE_HOME@.
+OCTAVE_EXEC_HOME corresponds to the configuration variable @var{exec_prefix}.
 @seealso{EXEC_PATH, IMAGE_PATH, OCTAVE_HOME}
 @end deftypefn */)
 {
@@ -490,7 +492,7 @@
 
 DEFUNX ("OCTAVE_VERSION", FOCTAVE_VERSION, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} OCTAVE_VERSION ()
+@deftypefn {} {@var{verstr} =} OCTAVE_VERSION ()
 Return the version number of Octave as a string.
 @seealso{ver, version}
 @end deftypefn */)
--- a/libinterp/corefcn/defun.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/defun.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -54,7 +54,7 @@
 void
 print_usage (void)
 {
-  tree_evaluator& tw = __get_evaluator__ ("print_usage");
+  tree_evaluator& tw = __get_evaluator__ ();
 
   const octave_function *cur = tw.current_function ();
 
@@ -97,7 +97,7 @@
 
   octave_value fval (fcn);
 
-  symbol_table& symtab = __get_symbol_table__ ("install_dld_function");
+  symbol_table& symtab = __get_symbol_table__ ();
 
   symtab.install_built_in_function (name, fval);
 }
@@ -114,7 +114,7 @@
 
   octave_value fval (fcn);
 
-  symbol_table& symtab = __get_symbol_table__ ("install_dld_function");
+  symbol_table& symtab = __get_symbol_table__ ();
 
   symtab.install_built_in_function (name, fval);
 }
@@ -130,7 +130,7 @@
 
   octave_value fval (fcn);
 
-  symbol_table& symtab = __get_symbol_table__ ("install_mex_function");
+  symbol_table& symtab = __get_symbol_table__ ();
 
   symtab.install_built_in_function (name, fval);
 }
@@ -140,7 +140,7 @@
 {
   dynamic_library retval;
 
-  tree_evaluator& tw = __get_evaluator__ ("get_current_shlib");
+  tree_evaluator& tw = __get_evaluator__ ();
 
   octave_function *curr_fcn = tw.current_function ();
 
--- a/libinterp/corefcn/det.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/det.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -54,7 +54,7 @@
 
 DEFUN (det, args, nargout,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} det (@var{A})
+@deftypefn  {} {@var{d} =} det (@var{A})
 @deftypefnx {} {[@var{d}, @var{rcond}] =} det (@var{A})
 Compute the determinant of @var{A}.
 
--- a/libinterp/corefcn/dirfns.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/dirfns.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -91,8 +91,8 @@
 directory does not exist, an error message is printed and the working
 directory is not changed.
 
-@code{chdir} is an alias for @code{cd} and can be used in all of the same
-calling formats.
+Programming Note: @code{chdir} is an alias for @code{cd} and can be used with
+all of the same calling formats.
 
 Compatibility Note: When called with no arguments, @sc{matlab} prints the
 present working directory rather than changing to the user's home directory.
@@ -131,8 +131,7 @@
 
 DEFUN (pwd, , ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} pwd ()
-@deftypefnx {} {@var{dir} =} pwd ()
+@deftypefn {} {@var{dir} =} pwd ()
 Return the current working directory.
 @seealso{cd, dir, ls, mkdir, rmdir}
 @end deftypefn */)
@@ -182,7 +181,9 @@
 
 DEFUN (__mkdir__, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} __mkdir__ (@var{parent}, @var{dir})
+@deftypefn  {} {} __mkdir__ (@var{dir})
+@deftypefnx {} {} __mkdir__ (@var{parent}, @var{dir})
+@deftypefnx {} {[@var{status}, @var{msg}, @var{msgid}] =} __mkdir__ (@dots{})
 Internal function called by mkdir.m.
 @seealso{mkdir, rmdir, pwd, cd, umask}
 @end deftypefn */)
@@ -392,7 +393,7 @@
 
 DEFUNX ("readlink", Freadlink, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn  {} {} readlink @var{symlink}
+@deftypefn  {} {@var{result} =} readlink @var{symlink}
 @deftypefnx {} {[@var{result}, @var{err}, @var{msg}] =} readlink (@var{symlink})
 Read the value of the symbolic link @var{symlink}.
 
@@ -470,7 +471,7 @@
 
 DEFUN (glob, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} glob (@var{pattern})
+@deftypefn {} {@var{cstr} =} glob (@var{pattern})
 Given an array of pattern strings (as a char array or a cell array) in
 @var{pattern}, return a cell array of filenames that match any of
 them, or an empty cell array if no patterns match.
@@ -577,7 +578,7 @@
 
 DEFUN (__wglob__, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} __wglob__ (@var{pattern})
+@deftypefn {} {@var{cstr} =} __wglob__ (@var{pattern})
 Windows-like glob for dir.
 
 Given an array of pattern strings (as a char array or a cell array) in
@@ -690,7 +691,7 @@
 
 DEFUN (__fnmatch__, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} fnmatch (@var{pattern}, @var{string})
+@deftypefn {} {@var{TF} =} fnmatch (@var{pattern}, @var{string})
 Return true or false for each element of @var{string} that matches any of
 the elements of the string array @var{pattern}, using the rules of
 filename pattern matching.
@@ -719,7 +720,7 @@
 
 DEFUN (filesep, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} filesep ()
+@deftypefn  {} {@var{sep} =} filesep ()
 @deftypefnx {} {} filesep ("all")
 Return the system-dependent character used to separate directory names.
 
@@ -768,7 +769,7 @@
        doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} confirm_recursive_rmdir ()
 @deftypefnx {} {@var{old_val} =} confirm_recursive_rmdir (@var{new_val})
-@deftypefnx {} {} confirm_recursive_rmdir (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} confirm_recursive_rmdir (@var{new_val}, "local")
 Query or set the internal variable that controls whether Octave
 will ask for confirmation before recursively removing a directory tree.
 
--- a/libinterp/corefcn/display.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/display.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -55,7 +55,7 @@
 
 DEFMETHOD (have_window_system, interp, , ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} have_window_system ()
+@deftypefn {} {@var{tf} =} have_window_system ()
 Return true if a window system is available (X11, Windows, or Apple OS X)
 and false otherwise.
 @seealso{isguirunning}
--- a/libinterp/corefcn/dot.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/dot.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -37,12 +37,14 @@
 
 OCTAVE_NAMESPACE_BEGIN
 
+// FIXME: input 'y' is no longer necessary (2/5/2022).
+//        At some point it would be better to change all occurrences of
+//        get_red_dims to eliminate this input parameter.
 static void
-get_red_dims (const dim_vector& x, const dim_vector& y, int dim,
+get_red_dims (const dim_vector& x, const dim_vector& /* y */, int dim,
               dim_vector& z, F77_INT& m, F77_INT& n, F77_INT& k)
 {
   int nd = x.ndims ();
-  assert (nd == y.ndims ());
   z = dim_vector::alloc (nd);
   octave_idx_type tmp_m = 1;
   octave_idx_type tmp_n = 1;
@@ -73,7 +75,8 @@
 
 DEFUN (dot, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} dot (@var{x}, @var{y}, @var{dim})
+@deftypefn  {} {@var{z} =} dot (@var{x}, @var{y})
+@deftypefnx {} {@var{z} =} dot (@var{x}, @var{y}, @var{dim})
 Compute the dot product of two vectors.
 
 If @var{x} and @var{y} are matrices, calculate the dot products along the
@@ -349,7 +352,7 @@
 
 DEFUN (blkmm, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} blkmm (@var{A}, @var{B})
+@deftypefn {} {@var{C} =} blkmm (@var{A}, @var{B})
 Compute products of matrix blocks.
 
 The blocks are given as 2-dimensional subarrays of the arrays @var{A},
--- a/libinterp/corefcn/environment.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/environment.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -157,7 +157,7 @@
            doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} EDITOR ()
 @deftypefnx {} {@var{old_val} =} EDITOR (@var{new_val})
-@deftypefnx {} {} EDITOR (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} EDITOR (@var{new_val}, "local")
 Query or set the internal variable that specifies the default text editor.
 
 The default value is taken from the environment variable @w{@env{EDITOR}}
@@ -192,7 +192,7 @@
            doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} EXEC_PATH ()
 @deftypefnx {} {@var{old_val} =} EXEC_PATH (@var{new_val})
-@deftypefnx {} {} EXEC_PATH (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} EXEC_PATH (@var{new_val}, "local")
 Query or set the internal variable that specifies a colon separated
 list of directories to append to the shell PATH when executing external
 programs.
@@ -229,7 +229,7 @@
            doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} IMAGE_PATH ()
 @deftypefnx {} {@var{old_val} =} IMAGE_PATH (@var{new_val})
-@deftypefnx {} {} IMAGE_PATH (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} IMAGE_PATH (@var{new_val}, "local")
 Query or set the internal variable that specifies a colon separated
 list of directories in which to search for image files.
 
--- a/libinterp/corefcn/error.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/error.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -76,7 +76,7 @@
 error_1 (octave::execution_exception& ee, const char *id, const char *fmt,
          va_list args)
 {
-  octave::error_system& es = octave::__get_error_system__ ("error_1");
+  octave::error_system& es = octave::__get_error_system__ ();
 
   es.error_1 (ee, id, fmt, args);
 }
@@ -85,7 +85,7 @@
 static void
 error_1 (const char *id, const char *fmt, va_list args)
 {
-  octave::error_system& es = octave::__get_error_system__ ("error_1");
+  octave::error_system& es = octave::__get_error_system__ ();
 
   es.error_1 (id, fmt, args);
 }
@@ -111,7 +111,7 @@
 static void
 vwarning (const char *id, const char *fmt, va_list args)
 {
-  octave::error_system& es = octave::__get_error_system__ ("warning");
+  octave::error_system& es = octave::__get_error_system__ ();
 
   es.vwarning (id, fmt, args);
 }
@@ -125,10 +125,10 @@
   va_end (args);
 }
 
-typedef void (*error_fun)(const char *, const char *, ...);
+typedef void (*error_fcn)(const char *, const char *, ...);
 
 static std::string
-handle_message (error_fun f, const char *id, const char *msg,
+handle_message (error_fcn f, const char *id, const char *msg,
                 const octave_value_list& args, bool have_fmt)
 {
   std::string retval;
@@ -657,7 +657,7 @@
 
     octave_idx_type nel = ident.numel ();
 
-    assert (nel != 0);
+    panic_if (nel == 0);
 
     bool found = false;
 
@@ -689,8 +689,7 @@
     // The warning state "all" is always supposed to remain in the list,
     // so we should always find a state, either explicitly or by using the
     // state for "all".
-
-    assert (found);
+    panic_unless (found);
 
     retval.assign ("identifier", id);
     retval.assign ("state", val);
@@ -956,7 +955,7 @@
 void
 vusage_with_id (const char *id, const char *fmt, va_list args)
 {
-  octave::error_system& es = octave::__get_error_system__ ("warning_enabled");
+  octave::error_system& es = octave::__get_error_system__ ();
 
   es.vusage (id, fmt, args);
 }
@@ -1109,7 +1108,7 @@
 void
 vpanic (const char *fmt, va_list args)
 {
-  octave::error_system& es = octave::__get_error_system__ ("vpanic");
+  octave::error_system& es = octave::__get_error_system__ ();
 
   es.vpanic (fmt, args);
 }
@@ -1255,7 +1254,6 @@
 @seealso{warning, lasterror}
 @end deftypefn */)
 {
-
   int nargin = args.length ();
 
   if (nargin == 0)
@@ -1816,7 +1814,7 @@
   args(1) = id;
   args(0) = state;
 
-  interpreter& interp = __get_interpreter__ ("set_warning_state");
+  interpreter& interp = __get_interpreter__ ();
 
   return Fwarning (interp, args, 1);
 }
@@ -1824,7 +1822,7 @@
 octave_value_list
 set_warning_state (const octave_value_list& args)
 {
-  interpreter& interp = __get_interpreter__ ("set_warning_state");
+  interpreter& interp = __get_interpreter__ ();
 
   return Fwarning (interp, args, 1);
 }
@@ -1832,7 +1830,7 @@
 int
 warning_enabled (const std::string& id)
 {
-  error_system& es = __get_error_system__ ("warning_enabled");
+  error_system& es = __get_error_system__ ();
 
   return es.warning_enabled (id);
 }
@@ -1840,7 +1838,7 @@
 void
 disable_warning (const std::string& id)
 {
-  error_system& es = __get_error_system__ ("disable_warning");
+  error_system& es = __get_error_system__ ();
 
   es.disable_warning (id);
 }
@@ -2079,7 +2077,7 @@
 
 With one argument, set the last warning message to @var{msg}.
 
-With two arguments, also set the last message identifier.
+With two arguments, also set the last message identifier to @var{msgid}.
 @seealso{warning, lasterror, lasterr}
 @end deftypefn */)
 {
@@ -2116,7 +2114,7 @@
            doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} beep_on_error ()
 @deftypefnx {} {@var{old_val} =} beep_on_error (@var{new_val})
-@deftypefnx {} {} beep_on_error (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} beep_on_error (@var{new_val}, "local")
 Query or set the internal variable that controls whether Octave will try
 to ring the terminal bell before printing an error message.
 
@@ -2134,7 +2132,7 @@
            doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} debug_on_error ()
 @deftypefnx {} {@var{old_val} =} debug_on_error (@var{new_val})
-@deftypefnx {} {} debug_on_error (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} debug_on_error (@var{new_val}, "local")
 Query or set the internal variable that controls whether Octave will try
 to enter the debugger when an error is encountered.
 
@@ -2156,7 +2154,7 @@
            doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} debug_on_warning ()
 @deftypefnx {} {@var{old_val} =} debug_on_warning (@var{new_val})
-@deftypefnx {} {} debug_on_warning (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} debug_on_warning (@var{new_val}, "local")
 Query or set the internal variable that controls whether Octave will try
 to enter the debugger when a warning is encountered.
 
@@ -2174,14 +2172,9 @@
 void
 interpreter_try (unwind_protect& frame)
 {
-  error_system& es = __get_error_system__ ("interpreter_try");
+  error_system& es = __get_error_system__ ();
 
   es.interpreter_try (frame);
 }
 
 OCTAVE_NAMESPACE_END
-
-// Deprecated variables and functions.
-
-// This variable is obsolete and always has the value 0.
-int error_state = 0;
--- a/libinterp/corefcn/error.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/error.h	Mon Aug 29 13:58:00 2022 +0200
@@ -174,7 +174,8 @@
 
     octave_map warning_options (void) const { return m_warning_options; }
 
-    void set_warning_options (const octave_map& val) { m_warning_options = val; }
+    void set_warning_options (const octave_map& val)
+    { m_warning_options = val; }
 
     octave_map warning_options (const octave_map& new_val)
     {
@@ -187,9 +188,7 @@
     last_error_message (const octave_value_list& args, int nargout);
 
     void set_last_error_message (const std::string& val)
-    {
-      m_last_error_message = val;
-    }
+    { m_last_error_message = val; }
 
     std::string last_error_message (void) const { return m_last_error_message; }
 
@@ -203,9 +202,11 @@
     OCTINTERP_API octave_value
     last_warning_message (const octave_value_list& args, int nargout);
 
-    void set_last_warning_message (const std::string& val) { m_last_warning_message = val; }
+    void set_last_warning_message (const std::string& val)
+    { m_last_warning_message = val; }
 
-    std::string last_warning_message (void) const { return m_last_warning_message; }
+    std::string last_warning_message (void) const
+    { return m_last_warning_message; }
 
     std::string last_warning_message (const std::string& s)
     {
@@ -217,7 +218,8 @@
     OCTINTERP_API octave_value
     last_warning_id (const octave_value_list& args, int nargout);
 
-    void set_last_warning_id (const std::string& val) { m_last_warning_id = val; }
+    void set_last_warning_id (const std::string& val)
+    { m_last_warning_id = val; }
 
     std::string last_warning_id (void) const { return m_last_warning_id; }
 
@@ -408,9 +410,6 @@
 // not deprecated and eventually removed, does it make sense to also
 // define them inside the octave namespace?
 
-#define panic_impossible()                                              \
-  panic ("impossible state reached in file '%s' at line %d", __FILE__, __LINE__)
-
 extern OCTINTERP_API void
 vmessage (const char *name, const char *fmt, va_list args);
 
@@ -506,6 +505,52 @@
 OCTAVE_NORETURN
 extern OCTINTERP_API void panic (const char *fmt, ...);
 
+#define panic_impossible()                                              \
+  panic ("impossible state reached in file '%s' at line %d", __FILE__, __LINE__)
+
+inline void
+panic_if (bool cond)
+{
+#ifndef NDEBUG
+  if (cond)
+    panic_impossible ();
+  else
+    return;
+
+#else
+  octave_unused_parameter (cond);
+#endif
+}
+
+inline void
+panic_unless (bool cond)
+{
+  panic_if (! cond);
+}
+
+#define error_impossible()                                              \
+  error ("impossible state reached in file '%s' at line %d", __FILE__, __LINE__)
+
+inline void
+error_if (bool cond)
+{
+#ifndef NDEBUG
+  if (cond)
+    error_impossible ();
+  else
+    return;
+
+#else
+  octave_unused_parameter (cond);
+#endif
+}
+
+inline void
+error_unless (bool cond)
+{
+  error_if (! cond);
+}
+
 OCTAVE_NAMESPACE_BEGIN
 
 //! Helper function for print_usage defined in defun.cc.
@@ -566,14 +611,6 @@
   octave::interpreter_try (uwp);
 }
 
-OCTAVE_DEPRECATED (6, "this function is obsolete and should not be needed")
-inline void reset_error_handler (void) { }
 #endif
 
-// This symbol must have be declared with the correct visibility
-// attributes when Octave is built, so it must appear unconditionally in
-// this header file.
-OCTAVE_DEPRECATED (6, "this variable is obsolete and always has the value 0")
-extern OCTINTERP_API int error_state;
-
 #endif
--- a/libinterp/corefcn/errwarn.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/errwarn.h	Mon Aug 29 13:58:00 2022 +0200
@@ -188,11 +188,4 @@
 extern OCTINTERP_API void
 warn_wrong_type_arg (const char *name, const octave_value& tc);
 
-#if defined (OCTAVE_PROVIDE_DEPRECATED_SYMBOLS)
-OCTAVE_DEPRECATED (6, "this function will be removed in a future version of Octave")
-inline void
-warn_divide_by_zero (void)
-{ }
 #endif
-
-#endif
--- a/libinterp/corefcn/event-manager.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/event-manager.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -48,7 +48,7 @@
 
   static int readline_event_hook (void)
   {
-    event_manager& evmgr = __get_event_manager__ ("octave_readline_hook");
+    event_manager& evmgr = __get_event_manager__ ();
 
     evmgr.process_events ();
 
@@ -225,7 +225,7 @@
 
 DEFMETHOD (__event_manager_enabled__, interp, , ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __event_manager_enabled__ ()
+@deftypefn {} {@var{tf} =} __event_manager_enabled__ ()
 Undocumented internal function.
 @end deftypefn */)
 {
@@ -236,7 +236,7 @@
 
 DEFMETHOD (__event_manager_have_dialogs__, interp, , ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __event_manager_have_dialogs__ ()
+@deftypefn {} {@var{tf} =} __event_manager_have_dialogs__ ()
 Undocumented internal function.
 @end deftypefn */)
 {
@@ -247,7 +247,7 @@
 
 DEFMETHOD (__event_manager_edit_file__, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __event_manager_edit_file__ (@var{file})
+@deftypefn {} {@var{status} =} __event_manager_edit_file__ (@var{file})
 Undocumented internal function.
 @end deftypefn */)
 {
@@ -279,7 +279,7 @@
 
 DEFMETHOD (__event_manager_question_dialog__, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __event_manager_question_dialog__ (@var{msg}, @var{title}, @var{btn1}, @var{btn2}, @var{btn3}, @var{default})
+@deftypefn {} {@var{btn_val} =} __event_manager_question_dialog__ (@var{msg}, @var{title}, @var{btn1}, @var{btn2}, @var{btn3}, @var{default})
 Undocumented internal function.
 @end deftypefn */)
 {
@@ -306,7 +306,7 @@
 
 DEFMETHOD (__event_manager_file_dialog__, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __event_manager_file_dialog__ (@var{filterlist}, @var{title}, @var{filename}, @var{multiselect}, @var{pathname})
+@deftypefn {} {[@var{fname}, @var{fpath}, @var{fltidx}] =} __event_manager_file_dialog__ (@var{filterlist}, @var{title}, @var{filename}, @var{multiselect}, @var{pathname})
 Undocumented internal function.
 @end deftypefn */)
 {
@@ -375,7 +375,7 @@
 
 DEFMETHOD (__event_manager_list_dialog__, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __event_manager_list_dialog__ (@var{list}, @var{mode}, @var{size}, @var{initial}, @var{name}, @var{prompt}, @var{ok_string}, @var{cancel_string})
+@deftypefn {} {[@var{sel}, @var{ok}] =} __event_manager_list_dialog__ (@var{list}, @var{mode}, @var{size}, @var{initial}, @var{name}, @var{prompt}, @var{ok_string}, @var{cancel_string})
 Undocumented internal function.
 @end deftypefn */)
 {
@@ -431,7 +431,7 @@
 
 DEFMETHOD (__event_manager_input_dialog__, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __event_manager_input_dialog__ (@var{prompt}, @var{title}, @var{rowscols}, @var{defaults})
+@deftypefn {} {@var{cstr} =} __event_manager_input_dialog__ (@var{prompt}, @var{title}, @var{rowscols}, @var{defaults})
 Undocumented internal function.
 @end deftypefn */)
 {
@@ -483,7 +483,7 @@
 
 DEFMETHOD (__event_manager_named_icon__, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __event_manager_dialog_icons__ (@var{icon_name})
+@deftypefn {} {@var{icon} =} __event_manager_dialog_icons__ (@var{icon_name})
 Undocumented internal function.
 @end deftypefn */)
 {
@@ -501,9 +501,10 @@
   return ovl (retval);
 }
 
+// FIXME: Why does this function return any value at all?
 DEFMETHOD (__event_manager_show_preferences__, interp, , ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __event_manager_show_preferences__ ()
+@deftypefn {} {@var{status} =} __event_manager_show_preferences__ ()
 Undocumented internal function.
 @end deftypefn */)
 {
@@ -514,7 +515,7 @@
 
 DEFMETHOD (__event_manager_apply_preferences__, interp, , ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __event_manager_apply_preferences__ ()
+@deftypefn {} {@var{status} =} __event_manager_apply_preferences__ ()
 Undocumented internal function.
 @end deftypefn */)
 {
@@ -525,7 +526,8 @@
 
 DEFMETHOD (__event_manager_gui_preference__, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __event_manager_gui_preference__ ()
+@deftypefn  {} {@var{prefval} =} __event_manager_gui_preference__ (@var{key})
+@deftypefnx {} {@var{prefval} =} __event_manager_gui_preference__ (@var{key}, @var{value})
 Undocumented internal function.
 @end deftypefn */)
 {
@@ -645,7 +647,7 @@
 
 DEFMETHOD (__event_manager_show_documentation__, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __event_manager_show_documentation__ (@var{filename})
+@deftypefn {} {@var{status} =} __event_manager_show_documentation__ (@var{filename})
 Undocumented internal function.
 @end deftypefn */)
 {
@@ -661,7 +663,7 @@
 
 DEFMETHOD (__event_manager_register_documentation__, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __event_manager_register_documentation__ (@var{filename})
+@deftypefn {} {@var{status} =} __event_manager_register_documentation__ (@var{filename})
 Undocumented internal function.
 @end deftypefn */)
 {
@@ -677,7 +679,7 @@
 
 DEFMETHOD (__event_manager_unregister_documentation__, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __event_manager_unregister_documentation__ (@var{filename})
+@deftypefn {} {@var{status} =} __event_manager_unregister_documentation__ (@var{filename})
 Undocumented internal function.
 @end deftypefn */)
 {
@@ -758,7 +760,7 @@
 
 DEFMETHOD (__event_manager_gui_status_update__, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __event_manager_gui_status_update__ (@var{feature}, @var{status})
+@deftypefn {} {@var{status} =} __event_manager_gui_status_update__ (@var{feature}, @var{status})
 Internal function for updating the status of some features in the GUI.
 @end deftypefn */)
 {
@@ -792,7 +794,7 @@
 
 DEFMETHOD (__event_manager_update_gui_lexer__, interp, , ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __event_manager_update_gui_lexer__ ()
+@deftypefn {} {@var{status} =} __event_manager_update_gui_lexer__ ()
 Undocumented internal function.
 @end deftypefn */)
 {
--- a/libinterp/corefcn/event-manager.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/event-manager.h	Mon Aug 29 13:58:00 2022 +0200
@@ -623,7 +623,8 @@
         return false;
     }
 
-    bool gui_status_update (const std::string& feature, const std::string& status)
+    bool gui_status_update (const std::string& feature,
+                            const std::string& status)
     {
       if (enabled ())
         {
--- a/libinterp/corefcn/fcn-info.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/fcn-info.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -54,8 +54,7 @@
   {
     octave_value retval;
 
-    load_path& lp
-      = __get_load_path__ ("fcn_info::fcn_info_rep::load_private_function");
+    load_path& lp = __get_load_path__ ();
 
     std::string file_name = lp.find_private_fcn (dir_name, name);
 
@@ -98,8 +97,7 @@
 
     std::string dir_name;
 
-    load_path& lp
-      = __get_load_path__ ("fcn_info::fcn_info_rep::load_class_constructor");
+    load_path& lp = __get_load_path__ ();
 
     std::string file_name = lp.find_method (name, name, dir_name, package_name);
 
@@ -159,8 +157,7 @@
       retval = load_class_constructor ();
     else
       {
-        cdef_manager& cdm
-          = __get_cdef_manager__ ("fcn_info::fcn_info_rep::load_class_method");
+        cdef_manager& cdm = __get_cdef_manager__ ();
 
         retval = cdm.find_method_symbol (name, dispatch_type);
 
@@ -168,7 +165,7 @@
           {
             std::string dir_name;
 
-            load_path& lp = __get_load_path__ ("fcn_info::fcn_info_rep::load_class_method");
+            load_path& lp = __get_load_path__ ();
 
             std::string file_name = lp.find_method (dispatch_type, name,
                                                     dir_name);
@@ -196,8 +193,7 @@
               {
                 // Search parent classes
 
-                symbol_table& symtab
-                  = __get_symbol_table__ ("fcn_info::fcn_info_rep::load_class_method");
+                symbol_table& symtab = __get_symbol_table__ ();
 
                 const std::list<std::string>& plist
                   = symtab.parent_classes (dispatch_type);
@@ -303,7 +299,7 @@
             // There's a non-builtin class in the argument list.
             dispatch_type = args(i).class_name ();
 
-            symbol_table& symtab = __get_symbol_table__ ("get_dispatch_type");
+            symbol_table& symtab = __get_symbol_table__ ();
 
             for (int j = i+1; j < n; j++)
               {
@@ -356,7 +352,7 @@
   {
     symbol_scope search_scope
       = (scope
-         ? scope : __get_current_scope__("fcn_info::fcn_info_rep::find"));
+         ? scope : __get_current_scope__ ());
 
     octave_value retval = xfind (search_scope, args);
 
@@ -366,7 +362,7 @@
         // the last prompt or chdir, so try updating the load path and
         // searching again.
 
-        load_path& lp = __get_load_path__ ("fcn_info::fcn_info_rep::find");
+        load_path& lp = __get_load_path__ ();
 
         lp.update ();
 
@@ -525,8 +521,7 @@
 
                             if (! dispatch_type.empty ())
                               {
-                                load_path& lp
-                                  = __get_load_path__ ("out_of_date_check");
+                                load_path& lp = __get_load_path__ ();
 
                                 file = lp.find_method (dispatch_type, nm,
                                                        dir_name, pack);
@@ -536,8 +531,7 @@
                                     std::string s_name;
                                     std::string s_pack;
 
-                                    symbol_table& symtab
-                                      = __get_symbol_table__ ("out_of_date_check");
+                                    symbol_table& symtab = __get_symbol_table__ ();
 
                                     const std::list<std::string>& plist
                                       = symtab.parent_classes (dispatch_type);
@@ -566,16 +560,14 @@
                             // Maybe it's an autoload?
                             if (file.empty ())
                               {
-                                tree_evaluator& tw
-                                  = __get_evaluator__ ("out_of_data_check");
+                                tree_evaluator& tw = __get_evaluator__ ();
 
                                 file = tw.lookup_autoload (nm);
                               }
 
                             if (file.empty ())
                               {
-                                load_path& lp
-                                  = __get_load_path__ ("out_of_date_check");
+                                load_path& lp = __get_load_path__ ();
                                 file = lp.find_fcn (nm, dir_name, pack);
                               }
                           }
@@ -648,8 +640,7 @@
                     // breakpoints associated with it
                     if (clear_breakpoints)
                       {
-                        bp_table& bptab
-                          = __get_bp_table__ ("out_of_date_check");
+                        bp_table& bptab = __get_bp_table__ ();
 
                         bptab.remove_all_breakpoints_from_function (canonical_nm,
                                                                     true);
@@ -857,7 +848,7 @@
   {
     symbol_scope search_scope
       = (scope
-         ? scope : __get_current_scope__("fcn_info::fcn_info_rep::find"));
+         ? scope : __get_current_scope__ ());
 
     octave_value retval = x_builtin_find (search_scope);
 
@@ -867,7 +858,7 @@
         // the last prompt or chdir, so try updating the load path and
         // searching again.
 
-        load_path& lp = __get_load_path__ ("fcn_info::fcn_info_rep::builtin_find");
+        load_path& lp = __get_load_path__ ();
 
         lp.update ();
 
@@ -1017,8 +1008,7 @@
 
     if (! autoload_function.is_defined ())
       {
-        tree_evaluator& tw
-          = __get_evaluator__ ("fcn_info::fcn_info_rep::x_builtin_find");
+        tree_evaluator& tw = __get_evaluator__ ();
 
         std::string file_name = tw.lookup_autoload (name);
 
@@ -1051,8 +1041,7 @@
       {
         std::string dir_name;
 
-        load_path& lp
-          = __get_load_path__ ("fcn_info::fcn_info_rep::find_user_function");
+        load_path& lp = __get_load_path__ ();
 
 
         std::string file_name = lp.find_fcn (name, dir_name, package_name);
@@ -1079,8 +1068,7 @@
 
     if (package.is_undefined ())
       {
-        cdef_manager& cdm
-          = __get_cdef_manager__ ("fcn_info::fcn_info_rep::find_package");
+        cdef_manager& cdm = __get_cdef_manager__ ();
 
         package = cdm.find_package_symbol (full_name ());
       }
--- a/libinterp/corefcn/fft.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/fft.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -195,9 +195,9 @@
 
 DEFUN (fft, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} fft (@var{x})
-@deftypefnx {} {} fft (@var{x}, @var{n})
-@deftypefnx {} {} fft (@var{x}, @var{n}, @var{dim})
+@deftypefn  {} {@var{y} =} fft (@var{x})
+@deftypefnx {} {@var{y} =} fft (@var{x}, @var{n})
+@deftypefnx {} {@var{y} =} fft (@var{x}, @var{n}, @var{dim})
 Compute the discrete Fourier transform of @var{x} using
 a Fast Fourier Transform (FFT) algorithm.
 
@@ -224,23 +224,23 @@
 
 DEFUN (ifft, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} ifft (@var{x})
-@deftypefnx {} {} ifft (@var{x}, @var{n})
-@deftypefnx {} {} ifft (@var{x}, @var{n}, @var{dim})
-Compute the inverse discrete Fourier transform of @var{x}
+@deftypefn  {} {@var{x} =} ifft (@var{y})
+@deftypefnx {} {@var{x} =} ifft (@var{y}, @var{n})
+@deftypefnx {} {@var{x} =} ifft (@var{y}, @var{n}, @var{dim})
+Compute the inverse discrete Fourier transform of @var{y}
 using a Fast Fourier Transform (FFT) algorithm.
 
 The inverse FFT is calculated along the first non-singleton dimension
-of the array.  Thus if @var{x} is a matrix, @code{fft (@var{x})} computes
-the inverse FFT for each column of @var{x}.
+of the array.  Thus if @var{y} is a matrix, @code{ifft (@var{y})} computes
+the inverse FFT for each column of @var{y}.
 
 If called with two arguments, @var{n} is expected to be an integer
-specifying the number of elements of @var{x} to use, or an empty
+specifying the number of elements of @var{y} to use, or an empty
 matrix to specify that its value should be ignored.  If @var{n} is
 larger than the dimension along which the inverse FFT is calculated, then
-@var{x} is resized and padded with zeros.  Otherwise, if @var{n} is
+@var{y} is resized and padded with zeros.  Otherwise, if @var{n} is
 smaller than the dimension along which the inverse FFT is calculated,
-then @var{x} is truncated.
+then @var{y} is truncated.
 
 If called with three arguments, @var{dim} is an integer specifying the
 dimension of the matrix along which the inverse FFT is performed.
--- a/libinterp/corefcn/fft2.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/fft2.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -139,8 +139,8 @@
 
 DEFUN (fft2, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} fft2 (@var{A})
-@deftypefnx {} {} fft2 (@var{A}, @var{m}, @var{n})
+@deftypefn  {} {@var{B} =} fft2 (@var{A})
+@deftypefnx {} {@var{B} =} fft2 (@var{A}, @var{m}, @var{n})
 Compute the two-dimensional discrete Fourier transform of @var{A} using
 a Fast Fourier Transform (FFT) algorithm.
 
@@ -159,17 +159,17 @@
 
 DEFUN (ifft2, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} ifft2 (@var{A})
-@deftypefnx {} {} ifft2 (@var{A}, @var{m}, @var{n})
-Compute the inverse two-dimensional discrete Fourier transform of @var{A}
+@deftypefn  {} {@var{A} =} ifft2 (@var{B})
+@deftypefnx {} {@var{A} =} ifft2 (@var{B}, @var{m}, @var{n})
+Compute the inverse two-dimensional discrete Fourier transform of @var{B}
 using a Fast Fourier Transform (FFT) algorithm.
 
 The optional arguments @var{m} and @var{n} may be used specify the number of
-rows and columns of @var{A} to use.  If either of these is larger than the
-size of @var{A}, @var{A} is resized and padded with zeros.
+rows and columns of @var{B} to use.  If either of these is larger than the
+size of @var{B}, @var{B} is resized and padded with zeros.
 
-If @var{A} is a multi-dimensional matrix, each two-dimensional sub-matrix
-of @var{A} is treated separately.
+If @var{B} is a multi-dimensional matrix, each two-dimensional sub-matrix
+of @var{B} is treated separately.
 @seealso{fft2, ifft, ifftn, fftw}
 @end deftypefn */)
 {
--- a/libinterp/corefcn/fftn.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/fftn.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -126,8 +126,8 @@
 
 DEFUN (fftn, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} fftn (@var{A})
-@deftypefnx {} {} fftn (@var{A}, @var{size})
+@deftypefn  {} {@var{B} =} fftn (@var{A})
+@deftypefnx {} {@var{B} =} fftn (@var{A}, @var{size})
 Compute the N-dimensional discrete Fourier transform of @var{A} using
 a Fast Fourier Transform (FFT) algorithm.
 
@@ -145,16 +145,16 @@
 
 DEFUN (ifftn, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} ifftn (@var{A})
-@deftypefnx {} {} ifftn (@var{A}, @var{size})
-Compute the inverse N-dimensional discrete Fourier transform of @var{A}
+@deftypefn  {} {@var{A} =} ifftn (@var{B})
+@deftypefnx {} {@var{A} =} ifftn (@var{B}, @var{size})
+Compute the inverse N-dimensional discrete Fourier transform of @var{B}
 using a Fast Fourier Transform (FFT) algorithm.
 
 The optional vector argument @var{size} may be used specify the dimensions
 of the array to be used.  If an element of @var{size} is smaller than the
-corresponding dimension of @var{A}, then the dimension of @var{A} is
+corresponding dimension of @var{B}, then the dimension of @var{B} is
 truncated prior to performing the inverse FFT@.  Otherwise, if an element of
-@var{size} is larger than the corresponding dimension then @var{A} is
+@var{size} is larger than the corresponding dimension then @var{B} is
 resized and padded with zeros.
 @seealso{fftn, ifft, ifft2, fftw}
 @end deftypefn */)
--- a/libinterp/corefcn/file-io.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/file-io.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -60,14 +60,12 @@
 #include "mkostemp-wrapper.h"
 #include "oct-env.h"
 #include "oct-locbuf.h"
-#include "tmpfile-wrapper.h"
 #include "unistd-wrappers.h"
 
 #include "builtin-defun-decls.h"
 #include "defun.h"
 #include "error.h"
 #include "errwarn.h"
-#include "file-io.h"
 #include "interpreter-private.h"
 #include "interpreter.h"
 #include "load-path.h"
@@ -177,8 +175,7 @@
 
 DEFMETHOD (fclose, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn  {} {} fclose (@var{fid})
-@deftypefnx {} {} fclose ("all")
+@deftypefn  {} {@var{status} =} fclose (@var{fid})
 @deftypefnx {} {@var{status} =} fclose ("all")
 Close the file specified by the file descriptor @var{fid}.
 
@@ -221,7 +218,7 @@
 
 DEFMETHOD (fflush, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} fflush (@var{fid})
+@deftypefn {} {@var{status} =} fflush (@var{fid})
 Flush output to file descriptor @var{fid}.
 
 @code{fflush} returns 0 on success and an OS dependent error value
@@ -704,8 +701,11 @@
 Move the file pointer to the beginning of the file specified by file
 descriptor @var{fid}.
 
-@code{frewind} returns 0 for success, and -1 if an error is encountered.  It
-is equivalent to @code{fseek (@var{fid}, 0, SEEK_SET)}.
+If an output @var{status} is requested then @code{frewind} returns 0 for
+success, and -1 if an error is encountered.
+
+Programming Note: @code{frewind} is equivalent to
+@code{fseek (@var{fid}, 0, SEEK_SET)}.
 @seealso{fseek, ftell, fopen}
 @end deftypefn */)
 {
@@ -728,9 +728,8 @@
 
 DEFMETHOD (fseek, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn  {} {} fseek (@var{fid}, @var{offset})
-@deftypefnx {} {} fseek (@var{fid}, @var{offset}, @var{origin})
-@deftypefnx {} {@var{status} =} fseek (@dots{})
+@deftypefn  {} {@var{status} =} fseek (@var{fid}, @var{offset})
+@deftypefnx {} {@var{status} =} fseek (@var{fid}, @var{offset}, @var{origin})
 Set the file pointer to the location @var{offset} within the file @var{fid}.
 
 The pointer is positioned @var{offset} characters from the @var{origin}, which
@@ -833,7 +832,8 @@
 If @var{fid} is omitted, the output is written to @code{stdout} making the
 function exactly equivalent to @code{printf}.
 
-The optional output returns the number of bytes written to the file.
+The optional output @var{numbytes} returns the number of bytes written to the
+file.
 
 Implementation Note: For compatibility with @sc{matlab}, escape sequences in
 the template string (e.g., @qcode{"@backslashchar{}n"} => newline) are
@@ -848,16 +848,19 @@
 
 DEFMETHOD (printf, interp, args, nargout,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} printf (@var{template}, @dots{})
+@deftypefn  {} {} printf (@var{template}, @dots{})
+@deftypefnx {} {@var{numbytes} =} printf (@dots{})
 Print optional arguments under the control of the template string
-@var{template} to the stream @code{stdout} and return the number of
-characters printed.
+@var{template} to the stream @code{stdout} and return the number of characters
+printed.
 @ifclear OCTAVE_MANUAL
 
-See the Formatted Output section of the GNU Octave manual for a
-complete description of the syntax of the template string.
+See the Formatted Output section of the GNU Octave manual for a complete
+description of the syntax of the template string.
 @end ifclear
 
+The optional output @var{numbytes} returns the number of bytes printed.
+
 Implementation Note: For compatibility with @sc{matlab}, escape sequences in
 the template string (e.g., @qcode{"@backslashchar{}n"} => newline) are
 expanded even when the template string is defined with single quotes.
@@ -883,20 +886,20 @@
 
   stream os = streams.lookup (args(0), who);
 
-  return ovl (os.puts (args(1), who));
+  return ovl (- (os.puts (args(1), who) < 0));
 }
 
 DEFMETHOD (fputs, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn  {} {} fputs (@var{fid}, @var{string})
-@deftypefnx {} {@var{status} =} fputs (@var{fid}, @var{string})
+@deftypefn {} {@var{status} =} fputs (@var{fid}, @var{string})
 Write the string @var{string} to the file with file descriptor @var{fid}.
 
 The string is written to the file with no additional formatting.  Use
 @code{fdisp} instead to automatically append a newline character appropriate
 for the local machine.
 
-Return a non-negative number on success or EOF on error.
+The optional output @var{status} is 0 for success, or -1 if an error was
+encountered.
 @seealso{fdisp, fprintf, fwrite, fopen}
 @end deftypefn */)
 {
@@ -905,16 +908,44 @@
   return puts_internal (interp, who, args);
 }
 
+/*
+## Check if text is correctly converted to output encoding
+%!test <*61839>
+%! str = "aäöu";  # string with non-ASCII characters
+%! fname = tempname ();
+%! fid = fopen (fname, "wt", "n", "ISO-8859-1");
+%! unwind_protect
+%!   fprintf (fid, '%s\n', str);
+%!   fdisp (fid, str);
+%!   fputs (fid, str);
+%!   fclose (fid);
+%!   ## re-open file for reading in binary mode
+%!   fid = fopen (fname, "rb");
+%!   fb = fread (fid);
+%!   fclose (fid);
+%!   ## check file content
+%!   encoded = [97 228 246 117];  # original string in ISO-8859-1 encoding
+%!   if (ispc ())
+%!     eol = double ("\r\n");
+%!   else
+%!     eol = double ("\n");
+%!   endif
+%!   assert (fb.', [encoded eol encoded eol encoded])
+%! unwind_protect_cleanup
+%!   unlink (fname);
+%! end_unwind_protect
+*/
+
 DEFMETHOD (puts, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn  {} {} puts (@var{string})
-@deftypefnx {} {@var{status} =} puts (@var{string})
+@deftypefn {} {@var{status} =} puts (@var{string})
 Write a string to the standard output with no formatting.
 
 The string is written verbatim to the standard output.  Use @code{disp} to
 automatically append a newline character appropriate for the local machine.
 
-Return a non-negative number on success and EOF on error.
+The optional output @var{status} is 0 for success, or -1 if an error was
+encountered.
 @seealso{fputs, disp}
 @end deftypefn */)
 {
@@ -927,7 +958,7 @@
 
 DEFUN (sprintf, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} sprintf (@var{template}, @dots{})
+@deftypefn {} {@var{str} =} sprintf (@var{template}, @dots{})
 This is like @code{printf}, except that the output is returned as a
 string.
 
@@ -2278,6 +2309,7 @@
 %! fid = fopen (f, "w+", "n", "iso-8859-1");
 %! unwind_protect
 %!   fprintf (fid, "abc,äöü\n");
+%!   fflush (fid);
 %!   fseek (fid, 0, "bof");
 %!   obs = textscan (fid, "%s", "delimiter", ",");
 %!   fclose (fid);
@@ -2329,6 +2361,8 @@
 %! C = textscan ('5973459727478852968', '%u64');
 %! assert (C{1}, uint64 (5973459727478852968));
 
+%!assert <*60711> (textscan('1,.,2', '%f', 'Delimiter', ','), {1});
+
 */
 
 // These tests have end-comment sequences, so can't just be in a comment
@@ -2648,23 +2682,23 @@
 
 DEFMETHOD (fwrite, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn  {} {} fwrite (@var{fid}, @var{data})
-@deftypefnx {} {} fwrite (@var{fid}, @var{data}, @var{precision})
-@deftypefnx {} {} fwrite (@var{fid}, @var{data}, @var{precision}, @var{skip})
-@deftypefnx {} {} fwrite (@var{fid}, @var{data}, @var{precision}, @var{skip}, @var{arch})
-@deftypefnx {} {@var{count} =} fwrite (@dots{})
+@deftypefn  {} {@var{count} =} fwrite (@var{fid}, @var{data})
+@deftypefnx {} {@var{count} =} fwrite (@var{fid}, @var{data}, @var{precision})
+@deftypefnx {} {@var{count} =} fwrite (@var{fid}, @var{data}, @var{precision}, @var{skip})
+@deftypefnx {} {@var{count} =} fwrite (@var{fid}, @var{data}, @var{precision}, @var{skip}, @var{arch})
 Write data in binary form to the file specified by the file descriptor
-@var{fid}, returning the number of values @var{count} successfully written
-to the file.
-
-The argument @var{data} is a matrix of values that are to be written to
-the file.  The values are extracted in column-major order.
+@var{fid}.
+
+The argument @var{data} is a matrix of values that are to be written to the
+file.  The values are extracted in column-major order.
 
 The remaining arguments @var{precision}, @var{skip}, and @var{arch} are
 optional, and are interpreted as described for @code{fread}.
 
-The behavior of @code{fwrite} is undefined if the values in @var{data}
-are too large to fit in the specified precision.
+The output @var{count} is the number of data items successfully written.
+
+Programming Note: The behavior of @code{fwrite} is undefined if the values in
+@var{data} are too large to fit in the specified precision.
 @seealso{fread, fputs, fprintf, fopen}
 @end deftypefn */)
 {
@@ -2838,10 +2872,13 @@
 
 DEFMETHODX ("pclose", Fpclose, interp, args, ,
             doc: /* -*- texinfo -*-
-@deftypefn {} {} pclose (@var{fid})
-Close a file identifier that was opened by @code{popen}.
-
-The function @code{fclose} may also be used for the same purpose.
+@deftypefn {} {@var{status} =} pclose (@var{fid})
+Close a file identifier @var{fid} that was opened by @code{popen}.
+
+If successful, @code{fclose} returns 0, otherwise, it returns -1.
+
+Programming Note: The function @code{fclose} may also be used for the same
+purpose.
 @seealso{fclose, popen}
 @end deftypefn */)
 {
@@ -2853,6 +2890,51 @@
   return ovl (streams.remove (args(0), "pclose"));
 }
 
+DEFUN (tempdir, args, ,
+       doc: /* -*- texinfo -*-
+@deftypefn {} {@var{dir} =} tempdir ()
+Return the name of the host system's directory for temporary files.
+
+The directory name is taken first from the environment variable @env{TMPDIR}.
+If that does not exist, the environment variable @env{TMP} (and on Windows
+platforms also with higher priority the environment variable @env{TEMP}) is
+checked.  If none of those are set, the system default returned by
+@code{P_tmpdir} is used.
+@seealso{P_tmpdir, tempname, mkstemp, tmpfile}
+@end deftypefn */)
+{
+  int nargin = args.length ();
+
+  if (nargin > 0)
+    print_usage ();
+
+  std::string tmpdir = sys::env::get_temp_directory ();
+
+  if (! sys::file_ops::is_dir_sep (tmpdir.back ()))
+    tmpdir += sys::file_ops::dir_sep_str ();
+
+  return ovl (tmpdir);
+}
+
+/*
+%!assert (ischar (tempdir ()))
+
+%!test
+%! old_wstate = warning ("off");
+%! old_tmpdir = getenv ("TMPDIR");
+%! unwind_protect
+%!   setenv ("TMPDIR", "__MY_TMP_DIR__");
+%!   assert (tempdir (), ["__MY_TMP_DIR__" filesep()]);
+%! unwind_protect_cleanup
+%!   if (! isempty (old_tmpdir))
+%!     setenv ("TMPDIR", old_tmpdir);
+%!   else
+%!     unsetenv ("TMPDIR");
+%!   endif
+%!   warning (old_wstate);
+%! end_unwind_protect
+*/
+
 DEFUN (tempname, args, ,
        doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{fname} =} tempname ()
@@ -2882,8 +2964,6 @@
 
   if (nargin > 0)
     dir = args(0).xstring_value ("tempname: DIR must be a string");
-  else
-    dir = sys::env::getenv ("TMPDIR");
 
   std::string pfx ("oct-");
 
@@ -2966,15 +3046,15 @@
 
   octave_value_list retval;
 
-  FILE *fid = octave_tmpfile_wrapper ();
+  std::string tmpfile (sys::tempnam (sys::env::get_temp_directory (), "oct-"));
+
+  FILE *fid = sys::fopen_tmp (tmpfile, "w+b");
 
   if (fid)
     {
-      std::string nm;
-
       std::ios::openmode md = fopen_mode_to_ios_mode ("w+b");
 
-      stream s = stdiostream::create (nm, fid, md);
+      stream s = stdiostream::create (tmpfile, fid, md);
 
       if (! s)
         {
@@ -3101,7 +3181,7 @@
 
 DEFUNX ("umask", Fumask, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} umask (@var{mask})
+@deftypefn {} {@var{oldmask} =} umask (@var{mask})
 Set the permission mask for file creation.
 
 The parameter @var{mask} is an integer, interpreted as an octal number.
@@ -3146,7 +3226,7 @@
 
 DEFUNX ("P_tmpdir", FP_tmpdir, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} P_tmpdir ()
+@deftypefn {} {@var{sys_tmpdir} =} P_tmpdir ()
 Return the name of the host system's @strong{default} directory for
 temporary files.
 
@@ -3168,7 +3248,7 @@
 
 DEFUNX ("SEEK_SET", FSEEK_SET, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} SEEK_SET ()
+@deftypefn {} {@var{fseek_origin} =} SEEK_SET ()
 Return the numerical value to pass to @code{fseek} to position the file pointer
 relative to the beginning of the file.
 @seealso{SEEK_CUR, SEEK_END, fseek}
@@ -3179,7 +3259,7 @@
 
 DEFUNX ("SEEK_CUR", FSEEK_CUR, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} SEEK_CUR ()
+@deftypefn {} {@var{fseek_origin} =} SEEK_CUR ()
 Return the numerical value to pass to @code{fseek} to position the file pointer
 relative to the current position.
 @seealso{SEEK_SET, SEEK_END, fseek}
@@ -3190,7 +3270,7 @@
 
 DEFUNX ("SEEK_END", FSEEK_END, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} SEEK_END ()
+@deftypefn {} {@var{fseek_origin} =} SEEK_END ()
 Return the numerical value to pass to @code{fseek} to position the file pointer
 relative to the end of the file.
 @seealso{SEEK_SET, SEEK_CUR, fseek}
@@ -3211,7 +3291,7 @@
 
 DEFMETHODX ("stdin", Fstdin, interp, args, ,
             doc: /* -*- texinfo -*-
-@deftypefn {} {} stdin ()
+@deftypefn {} {@var{fid} =} stdin ()
 Return the numeric value corresponding to the standard input stream.
 
 When Octave is used interactively, stdin is filtered through the command
@@ -3226,7 +3306,7 @@
 
 DEFMETHODX ("stdout", Fstdout, interp, args, ,
             doc: /* -*- texinfo -*-
-@deftypefn {} {} stdout ()
+@deftypefn {} {@var{fid} =} stdout ()
 Return the numeric value corresponding to the standard output stream.
 
 Data written to the standard output may be filtered through the pager.
@@ -3240,7 +3320,7 @@
 
 DEFMETHODX ("stderr", Fstderr, interp, args, ,
             doc: /* -*- texinfo -*-
-@deftypefn {} {} stderr ()
+@deftypefn {} {@var{fid} =} stderr ()
 Return the numeric value corresponding to the standard error stream.
 
 Even if paging is turned on, the standard error is not sent to the pager.
@@ -3253,24 +3333,4 @@
   return const_value ("stderr", args, streams.stderr_file ());
 }
 
-// Deprecated variables and functions.
-
-// Remove when corresponding global deprecated function is removed.
-void mark_for_deletion_deprecated (const std::string& file)
-{
-  octave::interpreter& interp
-    = octave::__get_interpreter__ ("mark_for_deletion");
-
-  interp.mark_for_deletion (file);
-}
-
-// Remove when corresponding global deprecated function is removed.
-void cleanup_tmp_files_deprecated (void)
-{
-  octave::interpreter& interp
-    = octave::__get_interpreter__ ("cleanup_tmp_files");
-
-  interp.cleanup_tmp_files ();
-}
-
 OCTAVE_NAMESPACE_END
--- a/libinterp/corefcn/file-io.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/file-io.h	Mon Aug 29 13:58:00 2022 +0200
@@ -23,43 +23,9 @@
 //
 ////////////////////////////////////////////////////////////////////////
 
-// Written by John C. Campbell <jcc@bevo.che.wisc.edu>
-
 #if ! defined (octave_file_io_h)
 #define octave_file_io_h 1
 
-#include "octave-config.h"
-
-#include <string>
-
-OCTAVE_NAMESPACE_BEGIN
-
-// Use this function internally until the function that uses it is
-// removed.  Remove when corresponding global deprecated function is
-// removed.
-extern void mark_for_deletion_deprecated (const std::string&);
-
-// Use this function internally until the function that uses it is
-// removed.  Remove when corresponding global deprecated function is
-// removed.
-extern void cleanup_tmp_files_deprecated (void);
-
-OCTAVE_NAMESPACE_END
-
-#if defined (OCTAVE_PROVIDE_DEPRECATED_SYMBOLS)
-
-OCTAVE_DEPRECATED (6, "use 'interpreter::mark_for_deletion' instead")
-inline void mark_for_deletion (const std::string& fname)
-{
-  octave::mark_for_deletion_deprecated (fname);
-}
-
-OCTAVE_DEPRECATED (6, "use 'interpreter::cleanup_tmp_files' instead")
-inline void cleanup_tmp_files (void)
-{
-  octave::cleanup_tmp_files_deprecated ();
-}
+#warning "file-io.h was deprecated in Octave 8 and will be removed in a future version."
 
 #endif
-
-#endif
--- a/libinterp/corefcn/filter.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/filter.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -106,6 +106,8 @@
   if (a_len <= 1 && si_len <= 0)
     return b(0) * x;
 
+  // Here onwards, either a_len > 1 or si_len >= 1 or both.
+
   y.resize (x_dims, 0.0);
 
   octave_idx_type x_stride = 1;
@@ -113,29 +115,69 @@
     x_stride *= x_dims(i);
 
   octave_idx_type x_num = x_dims.numel () / x_len;
+  // For deconv and fftfilt, x_num seems to always be 1.
+  // For directly calling filter, it can be more than 1.
+
   for (octave_idx_type num = 0; num < x_num; num++)
     {
-      octave_idx_type x_offset;
-      if (x_stride == 1)
-        x_offset = num * x_len;
-      else
-        {
-          x_offset = num;
-          octave_idx_type n_strides = num / x_stride;
-          x_offset += n_strides * x_stride * (x_len - 1);
-        }
+      octave_idx_type x_offset = (x_stride == 1) ? num * x_len
+                         : num + (num / x_stride) * x_stride * (x_len - 1);
+
       octave_idx_type si_offset = num * si_len;
 
+      // Try to achieve a balance between speed and interruptibility.
+      //
+      // One extreme is to not check for interruptions at all, which gives
+      // good speed but the user cannot use Ctrl-C for the whole duration.
+      // The other end is to check frequently from inside an inner loop,
+      // which slows down performance by 5X or 6X.
+      //
+      // Putting any sort of check in an inner loop seems to prevent the
+      // compiler from optimizing the loop, so we cannot say "check for
+      // interruptions every M iterations" using an if-statement.
+      //
+      // This is a compromise approach to split the total numer of loop
+      // executions into num_outer and num_inner, to provide periodic checks
+      // for interruptions without writing a conditional inside a tight loop.
+      //
+      // To make it more interruptible and run more slowly, reduce num_inner.
+      // To speed it up but make it less interruptible, increase it.
+      // May need to increase it slowly over time as computers get faster.
+      // The aim is to not lose Ctrl-C ability for longer than about 2 seconds.
+      //
+      // In December 2021, num_inner = 100000 is acceptable.
+
+      octave_idx_type num_execs = si_len-1; // 0 to num_execs-1
+      octave_idx_type num_inner = 100000;
+      octave_idx_type num_outer = num_execs / num_inner;
+
+      // The following if-else block depends on a_len and si_len,
+      // both of which are loop invariants in this 0 <= num < x_num loop.
+      // But x_num is so small in practice that using the if-else inside
+      // the loop has more benefits than duplicating the outer for-loop,
+      // even though the checks are on loop invariants.
+
+      // We cannot have a_len <= 1 AND si_len <= 0 because that case already
+      // returned above. This means exactly one of the following blocks
+      // inside the if-conditional will be obeyed: it is not possible for the
+      // if-block and the else-block to *both* skip. Therefore any code that
+      // is common to both branches can be pulled out here without affecting
+      // correctness or speed.
+
+      T *py = y.fortran_vec ();
+      T *psi = si.fortran_vec ();
+      const T *pb = b.data ();
+      const T *px = x.data ();
+      psi += si_offset;
+
       if (a_len > 1)
         {
-          T *py = y.fortran_vec ();
-          T *psi = si.fortran_vec ();
+          const T *pa = a.data ();
 
-          const T *pa = a.data ();
-          const T *pb = b.data ();
-          const T *px = x.data ();
-
-          psi += si_offset;
+          // Usually the last element to be written will be si_len-1
+          // but if si_len is 0, then we need the 0th element to be written.
+          // Pulling this check out of the for-loop makes it run faster.
+          octave_idx_type iidx = (si_len > 0) ? si_len-1 : 0;
 
           for (octave_idx_type i = 0, idx = x_offset;
                i < x_len;
@@ -143,34 +185,27 @@
             {
               py[idx] = psi[0] + pb[0] * px[idx];
 
-              if (si_len > 0)
+              // Outer and inner loops for interruption management
+              for (octave_idx_type u = 0; u <= num_outer; u++)
                 {
-                  for (octave_idx_type j = 0; j < si_len - 1; j++)
-                    {
-                      octave_quit ();
-
-                      psi[j] = psi[j+1] - pa[j+1] * py[idx] + pb[j+1] * px[idx];
-                    }
+                  octave_idx_type lo = u * num_inner;
+                  octave_idx_type hi = (lo + num_inner < num_execs-1)
+                                     ? lo + num_inner : num_execs-1;
 
-                  psi[si_len-1] = pb[si_len] * px[idx] - pa[si_len] * py[idx];
+                  // Inner loop, no interruption
+                  for (octave_idx_type j = lo; j <= hi; j++)
+                    psi[j] = psi[j+1] - pa[j+1] * py[idx] + pb[j+1] * px[idx];
+
+                  octave_quit();  // Check for interruptions
                 }
-              else
-                {
-                  octave_quit ();
 
-                  psi[0] = pb[si_len] * px[idx] - pa[si_len] * py[idx];
-                }
+              psi[iidx] = pb[si_len] * px[idx] - pa[si_len] * py[idx];
             }
         }
-      else if (si_len > 0)
+      else // a_len <= 1 ==> si_len MUST be > 0
         {
-          T *py = y.fortran_vec ();
-          T *psi = si.fortran_vec ();
-
-          const T *pb = b.data ();
-          const T *px = x.data ();
-
-          psi += si_offset;
+          // This else-block is almost the same as the above if-block,
+          // except for the absence of variable pa.
 
           for (octave_idx_type i = 0, idx = x_offset;
                i < x_len;
@@ -178,23 +213,21 @@
             {
               py[idx] = psi[0] + pb[0] * px[idx];
 
-              if (si_len > 1)
+              // Outer and inner loops for interruption management
+              for (octave_idx_type u = 0; u <= num_outer; u++)
                 {
-                  for (octave_idx_type j = 0; j < si_len - 1; j++)
-                    {
-                      octave_quit ();
-
-                      psi[j] = psi[j+1] + pb[j+1] * px[idx];
-                    }
+                  octave_idx_type lo = u * num_inner;
+                  octave_idx_type hi = (lo + num_inner < num_execs-1)
+                                     ? lo + num_inner : num_execs-1;
 
-                  psi[si_len-1] = pb[si_len] * px[idx];
+                  // Inner loop, no interruption
+                  for (octave_idx_type j = lo; j <= hi; j++)
+                    psi[j] = psi[j+1] + pb[j+1] * px[idx];
+
+                  octave_quit();  // Check for interruptions
                 }
-              else
-                {
-                  octave_quit ();
 
-                  psi[0] = pb[1] * px[idx];
-                }
+              psi[si_len-1] = pb[si_len] * px[idx];
             }
         }
     }
@@ -596,14 +629,16 @@
 
 %!assert (filter (1, ones (10,1) / 10, []), [])
 %!assert (filter (1, ones (10,1) / 10, zeros (0,10)), zeros (0,10))
-%!assert (filter (1, ones (10,1) / 10, single (1:5)), repmat (single (10), 1, 5))
+%!assert (filter (1, ones (10,1) / 10, single (1:5)),
+%!        repmat (single (10), 1, 5))
 
 ## Test using initial conditions
 %!assert (filter ([1, 1, 1], [1, 1], [1 2], [1, 1]), [2 2])
 %!assert (filter ([1, 1, 1], [1, 1], [1 2], [1, 1]'), [2 2])
 %!assert (filter ([1, 3], [1], [1 2; 3 4; 5 6], [4, 5]), [5 7; 6 10; 14 18])
 %!error filter ([1, 3], [1], [1 2; 3 4; 5 6], [4, 5]')
-%!assert (filter ([1, 3, 2], [1], [1 2; 3 4; 5 6], [1 0 0; 1 0 0], 2), [2 6; 3 13; 5 21])
+%!assert (filter ([1, 3, 2], [1], [1 2; 3 4; 5 6], [1 0 0; 1 0 0], 2),
+%!        [2 6; 3 13; 5 21])
 
 ## Test of DIM parameter
 %!test
--- a/libinterp/corefcn/find.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/find.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -54,7 +54,8 @@
     idx = nda.find ();
 
   // The maximum element is always at the end.
-  octave_idx_type iext = (idx.isempty () ? 0 : idx.xelem (idx.numel () - 1) + 1);
+  octave_idx_type iext = (idx.isempty () ? 0
+                                         : idx.xelem (idx.numel () - 1) + 1);
 
   switch (nargout)
     {
--- a/libinterp/corefcn/gcd.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/gcd.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -511,7 +511,8 @@
 /*
 %!assert (gcd (200, 300, 50, 35), 5)
 %!assert (gcd (int16 (200), int16 (300), int16 (50), int16 (35)), int16 (5))
-%!assert (gcd (uint64 (200), uint64 (300), uint64 (50), uint64 (35)), uint64 (5))
+%!assert (gcd (uint64 (200), uint64 (300), uint64 (50), uint64 (35)),
+%!        uint64 (5))
 %!assert (gcd (18-i, -29+3i), -3-4i)
 
 %!test
--- a/libinterp/corefcn/getgrent.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/getgrent.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -136,7 +136,7 @@
 
 DEFUN (setgrent, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} setgrent ()
+@deftypefn {} {[@var{status}, @var{msg}] =} setgrent ()
 Return the internal pointer to the beginning of the group database.
 @seealso{getgrent, endgrent}
 @end deftypefn */)
@@ -154,7 +154,7 @@
 
 DEFUN (endgrent, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} endgrent ()
+@deftypefn {} {[@var{status}, @var{msg}] =} endgrent ()
 Close the group database.
 @seealso{getgrent, setgrent}
 @end deftypefn */)
--- a/libinterp/corefcn/getpwent.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/getpwent.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -142,7 +142,7 @@
 
 DEFUN (setpwent, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} setpwent ()
+@deftypefn {} {[@var{status}, @var{msg}] =} setpwent ()
 Return the internal pointer to the beginning of the password database.
 @seealso{getpwent, endpwent}
 @end deftypefn */)
@@ -160,7 +160,7 @@
 
 DEFUN (endpwent, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} endpwent ()
+@deftypefn {} {[@var{status}, @var{msg}] =} endpwent ()
 Close the password database.
 @seealso{getpwent, setpwent}
 @end deftypefn */)
--- a/libinterp/corefcn/getrusage.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/getrusage.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -38,7 +38,7 @@
 
 DEFUN (getrusage, , ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} getrusage ()
+@deftypefn {} {@var{procstats} =} getrusage ()
 Return a structure containing a number of statistics about the current
 Octave process.
 
--- a/libinterp/corefcn/gl-render.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/gl-render.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -1551,8 +1551,7 @@
   {
 #if defined (HAVE_OPENGL)
 
-    gh_manager& gh_mgr
-      = __get_gh_manager__ ("opengl_renderer::draw_axes_x_grid");
+    gh_manager& gh_mgr = __get_gh_manager__ ();
 
     int xstate = props.get_xstate ();
 
@@ -1748,8 +1747,7 @@
   {
 #if defined (HAVE_OPENGL)
 
-    gh_manager& gh_mgr
-      = __get_gh_manager__ ("opengl_renderer::draw_axes_y_grid");
+    gh_manager& gh_mgr = __get_gh_manager__ ();
 
     int ystate = props.get_ystate ();
 
@@ -1944,8 +1942,7 @@
   void
   opengl_renderer::draw_axes_z_grid (const axes::properties& props)
   {
-    gh_manager& gh_mgr
-      = __get_gh_manager__ ("opengl_renderer::draw_axes_z_grid");
+    gh_manager& gh_mgr = __get_gh_manager__ ();
 
     int zstate = props.get_zstate ();
 
@@ -2167,8 +2164,7 @@
                                     std::list<graphics_object>& obj_list)
   {
 #if defined (HAVE_OPENGL)
-    gh_manager& gh_mgr
-      = __get_gh_manager__ ("opengl_renderer::draw_axes_all_lights");
+    gh_manager& gh_mgr = __get_gh_manager__ ();
 
     Matrix children = props.get_all_children ();
 
@@ -3771,8 +3767,7 @@
 
         if (props.markerfacecolor_is ("auto"))
           {
-            gh_manager& gh_mgr
-              = __get_gh_manager__ ("opengl_renderer::draw_scatter");
+            gh_manager& gh_mgr = __get_gh_manager__ ();
             graphics_object go = gh_mgr.get_object (props.get___myhandle__ ());
             graphics_object ax = go.get_ancestor ("axes");
             const axes::properties& ax_props
@@ -4163,7 +4158,7 @@
   {
     int len = hlist.numel ();
 
-    gh_manager& gh_mgr = __get_gh_manager__ ("opengl_renderer::draw");
+    gh_manager& gh_mgr = __get_gh_manager__ ();
 
     for (int i = len-1; i >= 0; i--)
       {
@@ -4664,7 +4659,7 @@
   double
   opengl_renderer::points_to_pixels (const double val) const
   {
-    gh_manager& gh_mgr = __get_gh_manager__ ("opengl_renderer::points_to_pixels");
+    gh_manager& gh_mgr = __get_gh_manager__ ();
 
     // FIXME: Does making this static cause problems if figure is moved to a
     //        2nd monitor with a different value for "screenpixelsperinch"?
--- a/libinterp/corefcn/gl-render.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/gl-render.h	Mon Aug 29 13:58:00 2022 +0200
@@ -146,7 +146,8 @@
                               double p1, double p1N, double p2, double p2N,
                               int xyz, bool is_3D);
 
-    virtual void render_tickmarks (const Matrix& ticks, double lim1, double lim2,
+    virtual void render_tickmarks (const Matrix& ticks,
+                                   double lim1, double lim2,
                                    double p1, double p1N, double p2, double p2N,
                                    double dx, double dy, double dz,
                                    int xyz, bool doubleside);
--- a/libinterp/corefcn/gl2ps-print.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/gl2ps-print.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -42,7 +42,7 @@
 #include "file-ops.h"
 #include "lo-mappers.h"
 #include "oct-locbuf.h"
-#include "tmpfile-wrapper.h"
+#include "oct-env.h"
 #include "unistd-wrappers.h"
 #include "unistr-wrappers.h"
 #include "unwind-prot.h"
@@ -91,7 +91,7 @@
     {
       bool retval = false;
 
-      gh_manager& gh_mgr = __get_gh_manager__ ("gl2ps_renderer::has_alpha");
+      gh_manager& gh_mgr = __get_gh_manager__ ();
 
       graphics_object go = gh_mgr.get_object (h);
 
@@ -295,7 +295,7 @@
   {
     bool retval = true;
 
-    gh_manager& gh_mgr = __get_gh_manager__ ("gl2ps_renderer::has_2D_axes");
+    gh_manager& gh_mgr = __get_gh_manager__ ();
 
     graphics_object go = gh_mgr.get_object (h);
 
@@ -327,7 +327,7 @@
   {
     std::string retval;
 
-    gh_manager& gh_mgr = __get_gh_manager__ ("gl2ps_renderer::get_title");
+    gh_manager& gh_mgr = __get_gh_manager__ ();
 
     graphics_object go = gh_mgr.get_object (h);
 
@@ -396,7 +396,9 @@
           gl2ps_sort = GL2PS_NO_SORT;
 
         // Use a temporary file in case an overflow happens
-        FILE *tmpf = octave_tmpfile_wrapper ();
+        std::string tmpfile (sys::tempnam (sys::env::get_temp_directory (),
+                             "oct-"));
+        FILE *tmpf = sys::fopen_tmp (tmpfile, "w+b");
 
         if (! tmpf)
           error ("gl2ps_renderer::draw: couldn't open temporary file for printing");
@@ -1329,16 +1331,20 @@
       std::swap (vp_lim_min(1), vp_lim_max(1));
 
     float clip_xmin
-      = do_clip ? (vp_lim_min(0) > m_xmin ? vp_lim_min(0) : m_xmin) : vp_lim_min(0);
+      = do_clip ? (vp_lim_min(0) > m_xmin ? vp_lim_min(0) : m_xmin)
+                : vp_lim_min(0);
 
     float clip_ymin
-      = do_clip ? (vp_lim_min(1) > m_ymin ? vp_lim_min(1) : m_ymin) : vp_lim_min(1);
+      = do_clip ? (vp_lim_min(1) > m_ymin ? vp_lim_min(1) : m_ymin)
+                : vp_lim_min(1);
 
     float clip_xmax
-      = do_clip ? (vp_lim_max(0) < m_xmax ? vp_lim_max(0) : m_xmax) : vp_lim_max(0);
+      = do_clip ? (vp_lim_max(0) < m_xmax ? vp_lim_max(0) : m_xmax)
+                : vp_lim_max(0);
 
     float clip_ymax
-      = do_clip ? (vp_lim_max(1) < m_ymax ? vp_lim_max(1) : m_ymax) : vp_lim_max(1);
+      = do_clip ? (vp_lim_max(1) < m_ymax ? vp_lim_max(1) : m_ymax)
+                : vp_lim_max(1);
 
     if (im_xmin < clip_xmin)
       j0 += (clip_xmin - im_xmin)/nor_dx + 1;
--- a/libinterp/corefcn/graphics-toolkit.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/graphics-toolkit.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -36,7 +36,7 @@
   void
   base_graphics_toolkit::update (const graphics_handle& h, int id)
   {
-    gh_manager& gh_mgr = __get_gh_manager__ ("base_graphics_toolkit::update");
+    gh_manager& gh_mgr = __get_gh_manager__ ();
 
     graphics_object go = gh_mgr.get_object (h);
 
@@ -46,8 +46,7 @@
   bool
   base_graphics_toolkit::initialize (const graphics_handle& h)
   {
-    gh_manager& gh_mgr
-      = __get_gh_manager__ ("base_graphics_toolkit::initialize");
+    gh_manager& gh_mgr = __get_gh_manager__ ();
 
     graphics_object go = gh_mgr.get_object (h);
 
@@ -57,8 +56,7 @@
   void
   base_graphics_toolkit::finalize (const graphics_handle& h)
   {
-    gh_manager& gh_mgr
-      = __get_gh_manager__ ("base_graphics_toolkit::finalize");
+    gh_manager& gh_mgr = __get_gh_manager__ ();
 
     graphics_object go = gh_mgr.get_object (h);
 
--- a/libinterp/corefcn/graphics-toolkit.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/graphics-toolkit.h	Mon Aug 29 13:58:00 2022 +0200
@@ -284,12 +284,4 @@
   };
 }
 
-#if defined (OCTAVE_PROVIDE_DEPRECATED_SYMBOLS)
-OCTAVE_DEPRECATED (6, "use 'octave::graphics_toolkit' instead")
-typedef octave::graphics_toolkit graphics_toolkit;
-
-OCTAVE_DEPRECATED (6, "use 'octave::base_graphics_toolkit' instead")
-typedef octave::base_graphics_toolkit base_graphics_toolkit;
 #endif
-
-#endif
--- a/libinterp/corefcn/graphics.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/graphics.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -224,8 +224,7 @@
 static double
 default_screendepth (void)
 {
-  octave::display_info& dpy_info
-    = octave::__get_display_info__ ("default_screendepth");
+  octave::display_info& dpy_info = octave::__get_display_info__ ();
 
   return dpy_info.depth ();
 }
@@ -235,8 +234,7 @@
 {
   Matrix retval (1, 4);
 
-  octave::display_info& dpy_info
-    = octave::__get_display_info__ ("default_screensize");
+  octave::display_info& dpy_info = octave::__get_display_info__ ();
 
   retval(0) = 1.0;
   retval(1) = 1.0;
@@ -249,8 +247,7 @@
 static double
 default_screenpixelsperinch (void)
 {
-  octave::display_info& dpy_info
-    = octave::__get_display_info__ ("default_screenpixelsperinch");
+  octave::display_info& dpy_info = octave::__get_display_info__ ();
 
   return (dpy_info.x_dpi () + dpy_info.y_dpi ()) / 2;
 }
@@ -538,8 +535,7 @@
 static std::string
 default_graphics_toolkit (void)
 {
-  octave::gtk_manager& gtk_mgr
-    = octave::__get_gtk_manager__ ("default_graphics_toolkit");
+  octave::gtk_manager& gtk_mgr = octave::__get_gtk_manager__ ();
 
   return gtk_mgr.default_toolkit ();
 }
@@ -626,7 +622,7 @@
                       bool call_createfcn = true,
                       bool notify_toolkit = true)
 {
-  gh_manager& gh_mgr = octave::__get_gh_manager__ ("make_graphics_handle");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   return gh_mgr.make_graphics_handle (go_name, parent, integer_figure_handle,
                                       call_createfcn, notify_toolkit);
@@ -838,7 +834,7 @@
                        const caseless_str& from_units,
                        const caseless_str& to_units)
 {
-  gh_manager& gh_mgr = octave::__get_gh_manager__ ("convert_text_position");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object go = gh_mgr.get_object (props.get___myhandle__ ());
 
@@ -928,7 +924,7 @@
 static Matrix
 screen_size_pixels (void)
 {
-  gh_manager& gh_mgr = octave::__get_gh_manager__ ("scren_size_pixels");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object obj = gh_mgr.get_object (0);
 
@@ -943,7 +939,7 @@
 {
   double retval = 1.0;
 
-  gh_manager& gh_mgr = octave::__get_gh_manager__ ("device_pixel_ratio");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object fig = gh_mgr.get_object (h).get_ancestor ("figure");
 
@@ -1008,7 +1004,7 @@
   Matrix cmap (1, 3, 0.0);
   Matrix clim (1, 2, 0.0);
 
-  gh_manager& gh_mgr = octave::__get_gh_manager__ ("convert_cdata");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object go = gh_mgr.get_object (props.get___myhandle__ ());
   graphics_object ax = go.get_ancestor ("axes");
@@ -1264,8 +1260,7 @@
       // Notify graphics toolkit.
       if (m_id >= 0 && do_notify_toolkit)
         {
-          gh_manager& gh_mgr
-            = octave::__get_gh_manager__ ("base_property::set");
+          gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
           graphics_object go = gh_mgr.get_object (m_parent);
           if (go)
@@ -1287,8 +1282,7 @@
 {
   const octave_value_list& l = m_listeners[mode];
 
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("base_property::run_listeners");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   for (int i = 0; i < l.length (); i++)
     gh_mgr.execute_listener (m_parent, l(i));
@@ -1789,7 +1783,7 @@
   double dv = v.xdouble_value (R"(set: invalid graphics handle for property "%s")",
                                get_name ().c_str ());
 
-  gh_manager& gh_mgr = octave::__get_gh_manager__ ("handle_property::do_set");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_handle gh = gh_mgr.lookup (dv);
 
@@ -1851,8 +1845,7 @@
   Matrix retval (m_children_list.size (), 1);
   octave_idx_type k = 0;
 
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("children_property::do_get_children");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object go = gh_mgr.get_object (0);
 
@@ -1888,8 +1881,7 @@
 void
 children_property::do_delete_children (bool clear, bool from_root)
 {
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("children_property::do_delete_children");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   if (from_root)
     {
@@ -1996,8 +1988,7 @@
 
       if (m_callback.is_defined () && ! m_callback.isempty ())
         {
-          gh_manager& gh_mgr
-            = octave::__get_gh_manager__ ("callback_property::execute");
+          gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
           gh_mgr.execute_callback (get_parent (), m_callback, data);
         }
@@ -2135,7 +2126,7 @@
 static void
 finalize_r (const graphics_handle& h)
 {
-  gh_manager& gh_mgr = octave::__get_gh_manager__ ("finalize_r");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object go = gh_mgr.get_object (h);
 
@@ -2153,7 +2144,7 @@
 static void
 initialize_r (const graphics_handle& h)
 {
-  gh_manager& gh_mgr = octave::__get_gh_manager__ ("initialize_r");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object go = gh_mgr.get_object (h);
 
@@ -2247,8 +2238,7 @@
 {
   if (! is_handle_visible ())
     {
-      gh_manager& gh_mgr
-        = octave::__get_gh_manager__ ("figure::properties::update_handlevisibility");
+      gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
       octave_value cf = gh_mgr.get_object (0).get ("currentfigure");
 
@@ -2274,7 +2264,7 @@
 static void
 update_text_pos (graphics_handle h)
 {
-  gh_manager& gh_mgr = octave::__get_gh_manager__ ("update_text_pos");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object go = gh_mgr.get_object (h);
 
@@ -2879,7 +2869,7 @@
 static bool
 isfigure (double val)
 {
-  gh_manager& gh_mgr = octave::__get_gh_manager__ ("isfigure");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object go = gh_mgr.get_object (val);
 
@@ -2982,7 +2972,7 @@
 xset (const graphics_handle& h, const caseless_str& pname,
       const octave_value& val)
 {
-  gh_manager& gh_mgr = octave::__get_gh_manager__ ("xset");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object go = gh_mgr.get_object (h);
 
@@ -2994,7 +2984,7 @@
 {
   if (args.length () > 0)
     {
-      gh_manager& gh_mgr = octave::__get_gh_manager__ ("xset");
+      gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
       graphics_object go = gh_mgr.get_object (h);
 
@@ -3005,7 +2995,7 @@
 static octave_value
 xget (const graphics_handle& h, const caseless_str& pname)
 {
-  gh_manager& gh_mgr = octave::__get_gh_manager__ ("xget");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object go = gh_mgr.get_object (h);
 
@@ -3020,7 +3010,7 @@
   double hv = ov.xdouble_value ("%s: %s must be a graphics handle",
                                 who.c_str (), pname.c_str ());
 
-  gh_manager& gh_mgr = octave::__get_gh_manager__ ("reparent");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_handle h = gh_mgr.lookup (hv);
 
@@ -3069,8 +3059,7 @@
 {
   if (h.ok ())
     {
-      gh_manager& gh_mgr
-        = octave::__get_gh_manager__ ("delete_graphics_object");
+      gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
       graphics_object go = gh_mgr.get_object (h);
 
@@ -3090,7 +3079,7 @@
 static void
 delete_graphics_object (double val, bool from_root = false)
 {
-  gh_manager& gh_mgr = octave::__get_gh_manager__ ("delete_graphics_object");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   delete_graphics_object (gh_mgr.lookup (val), from_root || isfigure (val));
 }
@@ -3113,7 +3102,7 @@
 {
   octave_value closerequestfcn = xget (h, "closerequestfcn");
 
-  gh_manager& gh_mgr = octave::__get_gh_manager__ ("close_figure");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   gh_mgr.execute_callback (h, closerequestfcn);
 }
@@ -3177,7 +3166,7 @@
 static void
 adopt (const graphics_handle& parent_h, const graphics_handle& h)
 {
-  gh_manager& gh_mgr = octave::__get_gh_manager__ ("adopt");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object parent_go = gh_mgr.get_object (parent_h);
 
@@ -3193,7 +3182,7 @@
 static bool
 ishghandle (double val)
 {
-  gh_manager& gh_mgr = octave::__get_gh_manager__ ("ishghandle");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_handle h = gh_mgr.lookup (val);
 
@@ -3225,7 +3214,7 @@
 static void
 xcreatefcn (const graphics_handle& h)
 {
-  gh_manager& gh_mgr = octave::__get_gh_manager__ ("xcreatefcn");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object go = gh_mgr.get_object (h);
 
@@ -3235,7 +3224,7 @@
 static void
 xinitialize (const graphics_handle& h)
 {
-  gh_manager& gh_mgr = octave::__get_gh_manager__ ("xinitialize");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object go = gh_mgr.get_object (h);
 
@@ -3267,8 +3256,7 @@
 xreset_default_properties (graphics_handle h,
                            property_list::pval_map_type factory_pval)
 {
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("xreset_default_properties");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object go = gh_mgr.get_object (h);
 
@@ -3431,8 +3419,7 @@
   if (hp == m___myhandle__)
     error ("set: can not set object parent to be object itself");
 
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("base_properties::set_parent");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_handle new_parent = gh_mgr.lookup (hp);
   if (! new_parent.ok ())
@@ -3481,8 +3468,7 @@
 
   // Attempt to mark parent object as modified if it exists
 
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("base_properties::mark_modified");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object parent_go = gh_mgr.get_object (get_parent ());
 
@@ -3493,8 +3479,7 @@
 void
 base_properties::override_defaults (base_graphics_object& obj)
 {
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("base_properties::override_defaults");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object parent_go = gh_mgr.get_object (get_parent ());
 
@@ -3505,8 +3490,7 @@
 void
 base_properties::update_axis_limits (const std::string& axis_type) const
 {
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("base_properties::update_axis_limits");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object go = gh_mgr.get_object (m___myhandle__);
 
@@ -3518,8 +3502,7 @@
 base_properties::update_axis_limits (const std::string& axis_type,
                                      const graphics_handle& h) const
 {
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("base_properties::update_axis_limits");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object go = gh_mgr.get_object (m___myhandle__);
 
@@ -3533,8 +3516,7 @@
   if (m_contextmenu.get ().isempty ())
     return;
 
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("base_properties::update_contextmenu");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object go = gh_mgr.get_object (m_contextmenu.get ());
 
@@ -3556,8 +3538,7 @@
 octave::graphics_toolkit
 base_properties::get_toolkit (void) const
 {
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("base_properties::get_toolkit");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object go = gh_mgr.get_object (get_parent ());
 
@@ -3572,8 +3553,7 @@
 {
   Matrix kids = get_children ();
 
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("base_properties::update_boundingbox");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   for (int i = 0; i < kids.numel (); i++)
     {
@@ -3587,8 +3567,7 @@
 void
 base_properties::update_autopos (const std::string& elem_type)
 {
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("base_properties::update_autopos");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object parent_go = gh_mgr.get_object (get_parent ());
 
@@ -3604,8 +3583,7 @@
 
   // This object should not be the figure "currentobject"
 
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("base_properties::update_handlevisibility");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object go (gh_mgr.get_object (get___myhandle__ ()));
 
@@ -3690,8 +3668,7 @@
                                        bool traverse,
                                        std::list<graphics_object>& children_list) const
 {
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("base_properties::get_children_of_type");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   Matrix ch = get_children ();
 
@@ -3724,8 +3701,7 @@
   if (! valid_object ())
     error ("base_graphics_object::update_axis_limits: invalid graphics object");
 
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("base_graphics_object::update_axis_limits");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object parent_go = gh_mgr.get_object (get_parent ());
 
@@ -3740,8 +3716,7 @@
   if (! valid_object ())
     error ("base_graphics_object::update_axis_limits: invalid graphics object");
 
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("base_graphics_object::update_axis_limits");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object parent_go = gh_mgr.get_object (get_parent ());
 
@@ -3775,8 +3750,7 @@
         }
       catch (const octave::execution_exception&)
         {
-          octave::interpreter& interp
-            = octave::__get_interpreter__ ("remove_all_listeners");
+          octave::interpreter& interp = octave::__get_interpreter__ ();
 
           interp.recover_from_exception ();
         }
@@ -3801,8 +3775,7 @@
         }
     }
 
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("base_graphics_object::build_user_defaults_map");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object parent_go = gh_mgr.get_object (get_parent ());
 
@@ -3815,8 +3788,7 @@
 {
   if (valid_object ())
     {
-      gh_manager& gh_mgr
-        = octave::__get_gh_manager__ ("base_graphics_object::reset_default_properties");
+      gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
       property_list::pval_map_type factory_pval
         = gh_mgr.get_object (0).get_factory_defaults_list ().find (type ())->second;
@@ -3835,8 +3807,7 @@
   std::string retval;
   octave_map m = get ().map_value ();
 
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("base_graphics_object::values_as_string");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object go = gh_mgr.get_object (get_handle ());
 
@@ -3870,8 +3841,7 @@
   if (! valid_object ())
     error ("base_graphics_object::value_as_string: invalid graphics object");
 
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("base_graphics_object::value_as_string");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object go = gh_mgr.get_object (get_handle ());
 
@@ -3902,8 +3872,7 @@
 
   octave_scalar_map m = get ().scalar_map_value ();
 
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("base_graphics_object::values_as_struct");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object go = gh_mgr.get_object (get_handle ());
 
@@ -3956,8 +3925,7 @@
         return *this;
       else
         {
-          gh_manager& gh_mgr
-            = octave::__get_gh_manager__ ("graphics_object::get_ancestor");
+          gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
           return gh_mgr.get_object (get_parent ()).get_ancestor (obj_type);
         }
@@ -3996,8 +3964,7 @@
 
       if (val.ok ())
         {
-          gh_manager& gh_mgr
-            = octave::__get_gh_manager__ ("root_figure::properties::set_currentfigure");
+          gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
           gh_mgr.push_figure (val);
         }
@@ -4013,8 +3980,7 @@
     {
       bool int_fig_handle = m_integerhandle.is_on ();
 
-      gh_manager& gh_mgr
-        = octave::__get_gh_manager__ ("figure::properties::set_integerhandle");
+      gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
       graphics_object this_go = gh_mgr.get_object (m___myhandle__);
 
@@ -4136,7 +4102,8 @@
 %!   set (0, "units", "pixels");
 %!   assert (get (0, "screensize"), sz + [1, 1, 0, 0]);
 %!   set (0, "units", "characters");
-%!   assert (get (0, "screensize"), sz / dpi * (74.951 / 12.0), 0.5 / dpi * (74.951 / 12.0));
+%!   assert (get (0, "screensize"),
+%!           sz / dpi * (74.951 / 12.0), 0.5 / dpi * (74.951 / 12.0));
 %! unwind_protect_cleanup
 %!   set (0, "units", old_units);
 %! end_unwind_protect
@@ -4145,8 +4112,7 @@
 void
 root_figure::properties::remove_child (const graphics_handle& h, bool)
 {
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("root_figure::properties::remove_child");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   gh_mgr.pop_figure (h);
 
@@ -4192,8 +4158,7 @@
 
       Matrix kids = get_children ();
 
-      gh_manager& gh_mgr
-        = octave::__get_gh_manager__ ("root_figure::properties::remove_child");
+      gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
       for (octave_idx_type i = 0; i < kids.numel (); i++)
         {
@@ -4235,8 +4200,7 @@
 
   std::string nm = val.string_value ();
 
-  octave::gtk_manager& gtk_mgr
-    = octave::__get_gtk_manager__ ("figure::properties::set___graphics_toolkit__");
+  octave::gtk_manager& gtk_mgr = octave::__get_gtk_manager__ ();
 
   octave::graphics_toolkit b = gtk_mgr.find_toolkit (nm);
 
@@ -4257,8 +4221,7 @@
 
   if (! get_currentaxes ().ok ())
     {
-      gh_manager& gh_mgr
-        = octave::__get_gh_manager__ ("figure::properties::adopt");
+      gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
       graphics_object go = gh_mgr.get_object (h);
 
@@ -4388,8 +4351,7 @@
     {
       if (old_bb(2) != new_bb(2) || old_bb(3) != new_bb(3))
         {
-          gh_manager& gh_mgr
-            = octave::__get_gh_manager__ ("figure::properties::set_position");
+          gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
           if (! get_resizefcn ().isempty ())
             gh_mgr.post_callback (m___myhandle__, "resizefcn");
@@ -5082,7 +5044,7 @@
     {
       graphics_handle parent_h = get_parent ();
 
-      gh_manager& gh_mgr = octave::__get_gh_manager__ ("figure::get_default");
+      gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
       graphics_object parent_go = gh_mgr.get_object (parent_h);
 
@@ -5188,7 +5150,8 @@
                    yaxislocation_is ("origin"),
                    m_xscale.is ("log") ? 2 : (xaxislocation_is ("origin") ? 0 :
                    (xaxislocation_is ("bottom") ? -1 : 1)), m_ylim);
-  calc_ticklabels (m_ztick, m_zticklabel, m_zscale.is ("log"), false, 2, m_zlim);
+  calc_ticklabels (m_ztick, m_zticklabel, m_zscale.is ("log"),
+                   false, 2, m_zlim);
 
   xset (m_xlabel.handle_value (), "handlevisibility", "off");
   xset (m_ylabel.handle_value (), "handlevisibility", "off");
@@ -5274,8 +5237,7 @@
 {
   Matrix pos = init_pos;
 
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("axes::properties::calc_tightbox");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object go = gh_mgr.get_object (get_parent ());
 
@@ -5413,8 +5375,7 @@
 
   graphics_handle val;
 
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("axes::properties::set_text_child");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object go = gh_mgr.get_object (gh_mgr.lookup (v));
 
@@ -5500,11 +5461,11 @@
   // FIXME: Should this have all properties in it?
   // Including ones we do don't implement?
 
-  // FIXME: This function is probably never called without mode == "reset"
-  //        Check that this is the case with an assert statement (1/6/2017).
+  // FIXME: This function is probably never called without mode == "reset".
+  //        Verify this is the case with error_unless() (1/6/2017).
   //        If there are reports of problems then figure out what code is
   //        calling it with the mode set to something else.
-  assert (mode == "reset");
+  error_unless (mode == "reset");
 
   Matrix tlim (1, 2, 0.0);
   tlim(1) = 1;
@@ -5642,8 +5603,7 @@
 
   m_visible = "on";
 
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("axes::properties::set_defaults");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object go = gh_mgr.get_object (m_xlabel.handle_value ());
   go.reset_default_properties ();
@@ -5709,8 +5669,7 @@
 {
   if (m___colormap__.get ().isempty ())
     {
-      gh_manager& gh_mgr
-        = octave::__get_gh_manager__ ("axes::properties::get_colormap");
+      gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
       graphics_object go (gh_mgr.get_object (get___myhandle__ ()));
       graphics_object go_f (go.get_ancestor ("figure"));
@@ -5727,8 +5686,7 @@
 {
   graphics_handle h = hp.handle_value ();
 
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("axes::properties::delete_text_child");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   if (h.ok ())
     {
@@ -5756,8 +5714,7 @@
 void
 axes::properties::remove_child (const graphics_handle& h, bool from_root)
 {
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("axes::properties::remove_child");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object go = gh_mgr.get_object (h);
 
@@ -5793,7 +5750,7 @@
 void
 axes::properties::adopt (const graphics_handle& h)
 {
-  gh_manager& gh_mgr = octave::__get_gh_manager__ ("axes::properties::adopt");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object go (gh_mgr.get_object (h));
 
@@ -6463,8 +6420,7 @@
   if (updating_xlabel_position)
     return;
 
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("axes::properties::update_xlabel_position");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object go = gh_mgr.get_object (get_xlabel ());
 
@@ -6484,7 +6440,8 @@
       if (xlabel_props.horizontalalignmentmode_is ("auto"))
         {
           xlabel_props.set_horizontalalignment
-            (m_xstate > AXE_DEPTH_DIR ? "center" : (m_xyzSym ? "left" : "right"));
+            (m_xstate > AXE_DEPTH_DIR ? "center"
+                                      : (m_xyzSym ? "left" : "right"));
 
           xlabel_props.set_horizontalalignmentmode ("auto");
         }
@@ -6567,8 +6524,7 @@
   if (updating_ylabel_position)
     return;
 
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("axes::properties::update_ylabel_position");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object go = gh_mgr.get_object (get_ylabel ());
 
@@ -6588,7 +6544,8 @@
       if (ylabel_props.horizontalalignmentmode_is ("auto"))
         {
           ylabel_props.set_horizontalalignment
-            (m_ystate > AXE_DEPTH_DIR ? "center" : (! m_xyzSym ? "left" : "right"));
+            (m_ystate > AXE_DEPTH_DIR ? "center"
+                                      : (! m_xyzSym ? "left" : "right"));
 
           ylabel_props.set_horizontalalignmentmode ("auto");
         }
@@ -6671,8 +6628,7 @@
   if (updating_zlabel_position)
     return;
 
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("axes::properties::update_zlabel_position");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object go = gh_mgr.get_object (get_zlabel ());
 
@@ -6798,8 +6754,7 @@
   if (updating_title_position)
     return;
 
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("axes::properties::update_title_position");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object go = gh_mgr.get_object (get_title ());
 
@@ -7010,8 +6965,7 @@
 axes::properties::update_label_color (handle_property label,
                                       color_property col)
 {
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("axes::properties::update_label_color");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   gh_mgr.get_object (label.handle_value ()).set ("color", col.get ());
 }
@@ -7019,8 +6973,7 @@
 void
 axes::properties::update_font (std::string prop)
 {
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("axes::properties::update_font");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   if (! prop.empty ())
     {
@@ -7064,8 +7017,7 @@
 
   if (parent_size.isempty ())
     {
-      gh_manager& gh_mgr
-        = octave::__get_gh_manager__ ("axes::properties::get_boundingbox");
+      gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
       graphics_object go = gh_mgr.get_object (get_parent ());
 
@@ -7120,8 +7072,7 @@
           else if (i == 3)
             htext = get_zlabel ();
 
-          gh_manager& gh_mgr
-            = octave::__get_gh_manager__ ("axes::properties::get_extent");
+          gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
           text::properties& text_props
             = reinterpret_cast<text::properties&>
@@ -7339,8 +7290,7 @@
 void
 axes::properties::update_units (const caseless_str& old_units)
 {
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("axes::properties::update_units");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object parent_go = gh_mgr.get_object (get_parent ());
 
@@ -7452,8 +7402,7 @@
     {
       graphics_handle parent_h = get_parent ();
 
-      gh_manager& gh_mgr
-        = octave::__get_gh_manager__ ("axes::properties::get_default");
+      gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
       graphics_object parent_go = gh_mgr.get_object (parent_h);
 
@@ -7780,7 +7729,8 @@
 Matrix
 axes::properties::get_axis_limits (double xmin, double xmax,
                                    double min_pos, double max_neg,
-                                   const bool logscale)
+                                   const bool logscale,
+                                   const std::string& method)
 {
   Matrix retval;
 
@@ -7832,17 +7782,38 @@
                   max_val *= 0.9;
                 }
             }
-          if (min_val > 0)
-            {
-              // Log plots with all positive data
-              min_val = std::pow (10, std::floor (log10 (min_val)));
-              max_val = std::pow (10, std::ceil (log10 (max_val)));
-            }
-          else
-            {
-              // Log plots with all negative data
-              min_val = -std::pow (10, std::ceil (log10 (-min_val)));
-              max_val = -std::pow (10, std::floor (log10 (-max_val)));
+
+          if (method == "tickaligned")
+            {
+              if (min_val > 0)
+                {
+                  // Log plots with all positive data
+                  min_val = std::pow (10, std::floor (log10 (min_val)));
+                  max_val = std::pow (10, std::ceil (log10 (max_val)));
+                }
+              else
+                {
+                  // Log plots with all negative data
+                  min_val = -std::pow (10, std::ceil (log10 (-min_val)));
+                  max_val = -std::pow (10, std::floor (log10 (-max_val)));
+                }
+            }
+          else if (method == "padded")
+            {
+              if (min_val > 0)
+                {
+                  // Log plots with all positive data
+                  double pad = (log10 (max_val) - log10 (min_val)) * 0.07;
+                  min_val = std::pow (10, log10 (min_val) - pad);
+                  max_val = std::pow (10, log10 (max_val) + pad);
+                }
+              else
+                {
+                  // Log plots with all negative data
+                  double pad = (log10 (-min_val) - log10 (-max_val)) * 0.07;
+                  min_val = -std::pow (10, log10 (-min_val) + pad);
+                  max_val = -std::pow (10, log10 (-max_val) - pad);
+                }
             }
         }
       else
@@ -7860,12 +7831,21 @@
               max_val += 0.1 * std::abs (max_val);
             }
 
-          double tick_sep = calc_tick_sep (min_val, max_val);
-          double min_tick = std::floor (min_val / tick_sep);
-          double max_tick = std::ceil (max_val / tick_sep);
-          // Prevent round-off from cropping ticks
-          min_val = std::min (min_val, tick_sep * min_tick);
-          max_val = std::max (max_val, tick_sep * max_tick);
+          if (method == "tickaligned")
+            {
+              double tick_sep = calc_tick_sep (min_val, max_val);
+              double min_tick = std::floor (min_val / tick_sep);
+              double max_tick = std::ceil (max_val / tick_sep);
+              // Prevent round-off from cropping ticks
+              min_val = std::min (min_val, tick_sep * min_tick);
+              max_val = std::max (max_val, tick_sep * max_tick);
+            }
+          else if (method == "padded")
+            {
+              double pad = 0.07 * (max_val - min_val);
+              min_val -= pad;
+              max_val += pad;
+            }
         }
     }
 
@@ -8080,13 +8060,16 @@
                                        array_property& mticks,
                                        bool limmode_is_auto,
                                        bool tickmode_is_auto,
-                                       bool is_logscale)
+                                       bool is_logscale,
+                                       bool method_is_padded,
+                                       bool method_is_tight)
 {
   if (lims.get ().isempty ())
     return;
 
   double lo = (lims.get ().matrix_value ())(0);
   double hi = (lims.get ().matrix_value ())(1);
+
   double lo_lim = lo;
   double hi_lim = hi;
   bool is_negative = lo < 0 && hi < 0;
@@ -8130,17 +8113,28 @@
 
       if (limmode_is_auto)
         {
-          // Adjust limits to include min and max ticks
           Matrix tmp_lims (1, 2);
-          tmp_lims(0) = std::min (tick_sep * i1, lo);
-          tmp_lims(1) = std::max (tick_sep * i2, hi);
+
+          if (! method_is_padded && ! method_is_tight)
+            {
+              // Adjust limits to include min and max ticks
+              tmp_lims(0) = std::min (tick_sep * i1, lo);
+              tmp_lims(1) = std::max (tick_sep * i2, hi);
+            }
+          else
+            {
+              tmp_lims(0) = lo;
+              tmp_lims(1) = hi;
+            }
 
           if (is_logscale)
             {
               tmp_lims(0) = std::pow (10., tmp_lims(0));
               tmp_lims(1) = std::pow (10., tmp_lims(1));
+
               if (tmp_lims(0) <= 0)
                 tmp_lims(0) = std::pow (10., lo);
+
               if (is_negative)
                 {
                   double tmp = tmp_lims(0);
@@ -8148,6 +8142,7 @@
                   tmp_lims(1) = -tmp;
                 }
             }
+
           lims = tmp_lims;
         }
       else
@@ -8360,8 +8355,7 @@
 
           if (m_txt_renderer.ok ())
             {
-              gh_manager& gh_mgr
-                = octave::__get_gh_manager__ ("axes::properties::get_ticklabel_extents");
+              gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
               octave::autolock guard (gh_mgr.graphics_lock ());
 
@@ -8395,7 +8389,7 @@
 {
   octave_idx_type n = kids.numel ();
 
-  gh_manager& gh_mgr = octave::__get_gh_manager__ ("get_children_limits");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   switch (limit_type)
     {
@@ -8516,9 +8510,11 @@
         {
           get_children_limits (min_val, max_val, min_pos, max_neg, kids, 'x');
 
+          std::string method = m_properties.get_xlimitmethod ();
           limits = m_properties.get_axis_limits (min_val, max_val,
                                                  min_pos, max_neg,
-                                                 m_properties.xscale_is ("log"));
+                                                 m_properties.xscale_is ("log"),
+                                                 method);
         }
       else
         m_properties.check_axis_limits (limits, kids,
@@ -8537,9 +8533,11 @@
         {
           get_children_limits (min_val, max_val, min_pos, max_neg, kids, 'y');
 
+          std::string method = m_properties.get_ylimitmethod ();
           limits = m_properties.get_axis_limits (min_val, max_val,
                                                  min_pos, max_neg,
-                                                 m_properties.yscale_is ("log"));
+                                                 m_properties.yscale_is ("log"),
+                                                 method);
         }
       else
         m_properties.check_axis_limits (limits, kids,
@@ -8561,9 +8559,11 @@
           m_properties.set_has3Dkids ((max_val - min_val) >
                                       std::numeric_limits<double>::epsilon ());
 
+          std::string method = m_properties.get_zlimitmethod ();
           limits = m_properties.get_axis_limits (min_val, max_val,
                                                  min_pos, max_neg,
-                                                 m_properties.zscale_is ("log"));
+                                                 m_properties.zscale_is ("log"),
+                                                 method);
         }
       else
         {
@@ -8716,9 +8716,11 @@
         {
           get_children_limits (min_val, max_val, min_pos, max_neg, kids, 'x');
 
+          std::string method = m_properties.get_xlimitmethod ();
           limits = m_properties.get_axis_limits (min_val, max_val,
                                                  min_pos, max_neg,
-                                                 m_properties.xscale_is ("log"));
+                                                 m_properties.xscale_is ("log"),
+                                                 method);
         }
       else
         {
@@ -8739,9 +8741,11 @@
         {
           get_children_limits (min_val, max_val, min_pos, max_neg, kids, 'y');
 
+          std::string method = m_properties.get_ylimitmethod ();
           limits = m_properties.get_axis_limits (min_val, max_val,
                                                  min_pos, max_neg,
-                                                 m_properties.yscale_is ("log"));
+                                                 m_properties.yscale_is ("log"),
+                                                 method);
         }
       else
         {
@@ -8771,9 +8775,11 @@
               && ! m_properties.zscale_is ("log"))
             min_val = max_val = 0.;
 
+          std::string method = m_properties.get_zlimitmethod ();
           limits = m_properties.get_axis_limits (min_val, max_val,
                                                  min_pos, max_neg,
-                                                 m_properties.zscale_is ("log"));
+                                                 m_properties.zscale_is ("log"),
+                                                 method);
         }
       else
         {
@@ -9268,8 +9274,7 @@
 {
   if (! is_handle_visible ())
     {
-      gh_manager& gh_mgr
-        = octave::__get_gh_manager__ ("axes::properties::update_handlevisibility");
+      gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
       graphics_object go (gh_mgr.get_object (get___myhandle__ ()));
 
@@ -9296,8 +9301,7 @@
 void
 figure::properties::init_toolkit (void)
 {
-  octave::gtk_manager& gtk_mgr
-    = octave::__get_gtk_manager__ ("figure::properties::init_toolkit");
+  octave::gtk_manager& gtk_mgr = octave::__get_gtk_manager__ ();
 
   m_toolkit = gtk_mgr.get_toolkit ();
 }
@@ -9500,8 +9504,7 @@
 
   if (new_units == "normalized" || old_units == "normalized")
     {
-      gh_manager& gh_mgr
-        = octave::__get_gh_manager__ ("text::properties::update_fontunits");
+      gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
       graphics_object go (gh_mgr.get_object (get___myhandle__ ()));
 
@@ -9520,8 +9523,7 @@
 {
   double dpr = device_pixel_ratio (get___myhandle__ ());
 
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("text::properties::update_font");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   octave::autolock guard (gh_mgr.graphics_lock ());
 
@@ -9566,8 +9568,7 @@
 
   string_vector sv = string_prop.string_vector_value ();
 
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("text::properties::update_text_extent");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   octave::autolock guard (gh_mgr.graphics_lock ());
 
@@ -9633,8 +9634,7 @@
   double fontsz = get_fontsize ();
   double parent_height = box_pix_height;
 
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("text::properties::get___fontsize_points__");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object go (gh_mgr.get_object (get___myhandle__ ()));
 
@@ -9672,8 +9672,7 @@
 void
 light::properties::update_visible (void)
 {
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("light::properties::update_visible");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object go = gh_mgr.get_object (get___myhandle__ ());
 
@@ -9690,8 +9689,7 @@
 bool
 patch::properties::get_do_lighting (void) const
 {
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("patch::properties::get_do_lighting");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object go = gh_mgr.get_object (get___myhandle__ ());
 
@@ -10322,8 +10320,8 @@
   if (! cd.isempty () && (c_rows != 1 || c_cols != 3)
       && (c_rows != x_rows || (c_cols != 1 && c_cols != 3)))
     {
-      m_bad_data_msg = "cdata must be an rgb triplet or have the same number of "
-                       "rows as X and one or three columns";
+      m_bad_data_msg = "cdata must be an rgb triplet or have the same number "
+                       "of rows as X and one or three columns";
       return;
     }
 
@@ -10348,8 +10346,7 @@
   if (series_idx.isempty ())
     return;
 
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("scatter::properties::update_color");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object go = gh_mgr.get_object (get___myhandle__ ());
 
@@ -10411,8 +10408,7 @@
 bool
 surface::properties::get_do_lighting (void) const
 {
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("surface::properties::get_do_lighting");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object go = gh_mgr.get_object (get___myhandle__ ());
 
@@ -10704,8 +10700,7 @@
 void
 hggroup::properties::remove_child (const graphics_handle& h, bool from_root)
 {
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("hggroup::properties::remove_child");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object go = gh_mgr.get_object (h);
 
@@ -10722,8 +10717,7 @@
 void
 hggroup::properties::adopt (const graphics_handle& h)
 {
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("hggroup::properties::adopt");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object go = gh_mgr.get_object (h);
 
@@ -10740,8 +10734,7 @@
 void
 hggroup::properties::update_limits (void) const
 {
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("hggroup::properties::update_limits");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object go = gh_mgr.get_object (m___myhandle__);
 
@@ -10758,8 +10751,7 @@
 void
 hggroup::properties::update_limits (const graphics_handle& h) const
 {
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("hggroup::properties::update_limits");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object go = gh_mgr.get_object (m___myhandle__);
 
@@ -10979,8 +10971,7 @@
   // Clear the uicontextmenu property of dependent objects
   if (m_beingdeleted.is ("on"))
     {
-      gh_manager& gh_mgr
-        = octave::__get_gh_manager__ ("uicontextmenu::properties::update_beingdeleted");
+      gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
       std::list<graphics_handle> lst = get_dependent_obj_list ();
 
@@ -11029,8 +11020,7 @@
 {
   Matrix m = m_extent.get ().matrix_value ();
 
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("uicontrol::properties::get_extent");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object parent_go = gh_mgr.get_object (get_parent ());
 
@@ -11045,8 +11035,7 @@
 {
   // FIXME: support multiline text
 
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("uicontrol::properties::update_text_extent");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object go = gh_mgr.get_object (get___myhandle__ ());
 
@@ -11058,8 +11047,7 @@
 {
   Matrix pos = get_position ().matrix_value ();
 
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("uicontrol::properties::update_units");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object parent_go = gh_mgr.get_object (get_parent ());
 
@@ -11075,8 +11063,7 @@
 void
 uicontrol::properties::set_style (const octave_value& st)
 {
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("uicontrol::properties::set_style");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object go_parent = gh_mgr.get_object (get_parent ());
   if (go_parent.valid_object () && go_parent.isa ("uibuttongroup"))
@@ -11129,8 +11116,7 @@
 
   if (parent_size.isempty ())
     {
-      gh_manager& gh_mgr
-        = octave::__get_gh_manager__ ("uicontrol::properties::get_boundingbox");
+      gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
       graphics_object go = gh_mgr.get_object (get_parent ());
 
@@ -11196,8 +11182,7 @@
 
   if (parent_size.isempty ())
     {
-      gh_manager& gh_mgr
-        = octave::__get_gh_manager__ ("uibuttongroup::properties::get_boundingbox");
+      gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
       graphics_object go = gh_mgr.get_object (get_parent ());
 
@@ -11272,8 +11257,7 @@
     {
       if (old_bb(2) != new_bb(2) || old_bb(3) != new_bb(3))
         {
-          gh_manager& gh_mgr
-            = octave::__get_gh_manager__ ("uibuttongroup::properties::set_position");
+          gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
           if (! get_resizefcn ().isempty ())
             gh_mgr.post_callback (m___myhandle__, "resizefcn");
@@ -11309,8 +11293,7 @@
 {
   Matrix pos = get_position ().matrix_value ();
 
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("uibuttongroup::properties::update_units");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object parent_go = gh_mgr.get_object (get_parent ());
 
@@ -11375,8 +11358,7 @@
   graphics_handle val (v);
   if (val.ok ())
     {
-      gh_manager& gh_mgr
-        = octave::__get_gh_manager__ ("uibuttongroup::properties::set_selectedobject");
+      gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
       graphics_object go (gh_mgr.get_object (val));
 
@@ -11419,8 +11401,7 @@
   graphics_handle current_selected = get_selectedobject ();
   bool has_selected = current_selected.ok ();
 
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("uibuttongroup::properties::adopt");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object go = gh_mgr.get_object (h);
 
@@ -11444,8 +11425,7 @@
 
   if (parent_size.isempty ())
     {
-      gh_manager& gh_mgr
-        = octave::__get_gh_manager__ ("uipanel::properties::get_boundingbox");
+      gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
       graphics_object go = gh_mgr.get_object (get_parent ());
 
@@ -11520,8 +11500,7 @@
     {
       if (old_bb(2) != new_bb(2) || old_bb(3) != new_bb(3))
         {
-          gh_manager& gh_mgr
-            = octave::__get_gh_manager__ ("uipanel::properties::set_position");
+          gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
           if (! get_resizefcn ().isempty ())
             gh_mgr.post_callback (m___myhandle__, "resizefcn");
@@ -11558,8 +11537,7 @@
 {
   Matrix pos = get_position ().matrix_value ();
 
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("uipanel::properties::update_units");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object parent_go = gh_mgr.get_object (get_parent ());
 
@@ -11617,8 +11595,7 @@
 
   if (parent_size.isempty ())
     {
-      gh_manager& gh_mgr
-        = octave::__get_gh_manager__ ("uitable::properties::get_boundingbox");
+      gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
       graphics_object go = gh_mgr.get_object (get_parent ());
 
@@ -11744,8 +11721,7 @@
 {
   Matrix pos = get_position ().matrix_value ();
 
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("uitable::properties::update_units");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object parent_go = gh_mgr.get_object (get_parent ());
 
@@ -11834,8 +11810,7 @@
   // FIXME: Is it really acceptable to just let the toolkit update the extent?
   Matrix m = m_extent.get ().matrix_value ();
 
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("uitable::properties::get_extent");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object parent_go = gh_mgr.get_object (get_parent ());
 
@@ -11861,8 +11836,7 @@
     {
       graphics_handle parent_h = get_parent ();
 
-      gh_manager& gh_mgr
-        = octave::__get_gh_manager__ ("uitoolbar::get_default");
+      gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
       graphics_object parent_go = gh_mgr.get_object (parent_h);
 
@@ -11889,8 +11863,7 @@
 {
   graphics_handle parent_h = get_parent ();
 
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("base_graphics_object::get_default");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object parent_go = gh_mgr.get_object (parent_h);
 
@@ -11900,8 +11873,7 @@
 octave_value
 base_graphics_object::get_factory_default (const caseless_str& name) const
 {
-  gh_manager& gh_mgr
-    = octave::__get_gh_manager__ ("base_graphics_object::get_factory_default");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object parent_go = gh_mgr.get_object (0);
 
@@ -11918,7 +11890,7 @@
 {
   m_handle_map[0] = graphics_object (new root_figure ());
 
-  octave::gtk_manager& gtk_mgr = octave::__get_gtk_manager__ ("gh_manager");
+  octave::gtk_manager& gtk_mgr = octave::__get_gtk_manager__ ();
 
   // Make sure the default graphics toolkit is registered.
   gtk_mgr.default_toolkit ();
@@ -12038,8 +12010,7 @@
 
   void execute (void)
   {
-    gh_manager& gh_mgr
-      = octave::__get_gh_manager__ ("callback_event::execute");
+    gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
     if (m_callback.is_defined ())
       gh_mgr.execute_callback (m_handle, m_callback, m_callback_data);
@@ -12073,8 +12044,7 @@
   {
     if (! m_mcode.empty ())
       {
-        gh_manager& gh_mgr
-          = octave::__get_gh_manager__ ("mcode_event::execute");
+        gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
         graphics_object go = gh_mgr.get_object (m_handle);
 
@@ -12141,7 +12111,7 @@
 
   void execute (void)
   {
-    gh_manager& gh_mgr = octave::__get_gh_manager__ ("set_event::execute");
+    gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
     octave::autolock guard (gh_mgr.graphics_lock ());
 
@@ -12249,7 +12219,7 @@
 static void
 xset_gcbo (const graphics_handle& h)
 {
-  gh_manager& gh_mgr = octave::__get_gh_manager__ ("xset_gcbo");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object go = gh_mgr.get_object (0);
 
@@ -12388,7 +12358,7 @@
 static int
 process_graphics_events (void)
 {
-  gh_manager& gh_mgr = octave::__get_gh_manager__ ("process_graphics_events");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   return gh_mgr.process_events ();
 }
@@ -12644,7 +12614,7 @@
 
 DEFMETHOD (ishghandle, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} ishghandle (@var{h})
+@deftypefn {} {@var{tf} =} ishghandle (@var{h})
 Return true if @var{h} is a graphics handle and false otherwise.
 
 @var{h} may also be a matrix of handles in which case a logical array is
@@ -12685,7 +12655,7 @@
 static bool
 is_handle_visible (const graphics_handle& h)
 {
-  gh_manager& gh_mgr = octave::__get_gh_manager__ ("is_handle_visible");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   return h.ok () && gh_mgr.is_handle_visible (h);
 }
@@ -12693,7 +12663,7 @@
 static bool
 is_handle_visible (double val)
 {
-  gh_manager& gh_mgr = octave::__get_gh_manager__ ("is_handle_visible");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   return is_handle_visible (gh_mgr.lookup (val));
 }
@@ -12722,7 +12692,7 @@
 
 DEFUN (__is_handle_visible__, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} __is_handle_visible__ (@var{h})
+@deftypefn {} {@var{tf} =} __is_handle_visible__ (@var{h})
 Undocumented internal function.
 @end deftypefn */)
 {
@@ -13046,7 +13016,7 @@
 {
   std::string retval;
 
-  gh_manager& gh_mgr = octave::__get_gh_manager__ ("get_graphics_object_type");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_object go = gh_mgr.get_object (val);
 
@@ -13187,7 +13157,7 @@
 
 DEFMETHOD (__get__, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __get__ (@var{h})
+@deftypefn {} {@var{props} =} __get__ (@var{h})
 Undocumented internal function.
 @end deftypefn */)
 {
@@ -13264,7 +13234,7 @@
   if (octave::math::isnan (val))
     val = args(0).xdouble_value ("__go_%s__: invalid parent", go_name.c_str ());
 
-  gh_manager& gh_mgr = octave::__get_gh_manager__ ("make_graphics_object");
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   graphics_handle parent = gh_mgr.lookup (val);
 
@@ -13309,7 +13279,7 @@
 
 DEFMETHOD (__go_figure__, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __go_figure__ (@var{fignum})
+@deftypefn {} {@var{hfig} =} __go_figure__ (@var{fignum})
 Undocumented internal function.
 @end deftypefn */)
 {
@@ -13427,7 +13397,7 @@
     {
       Matrix kids = go.get_properties ().get_children ();
 
-      gh_manager& gh_mgr = octave::__get_gh_manager__ ("calc_dimensions");
+      gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
       for (octave_idx_type i = 0; i < kids.numel (); i++)
         {
@@ -13451,7 +13421,7 @@
 
 DEFMETHOD (__calc_dimensions__, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __calc_dimensions__ (@var{axes})
+@deftypefn {} {@var{ndims} =} __calc_dimensions__ (@var{axes})
 Internal function.
 
 Determine the number of dimensions in a graphics object, either 2 or 3.
@@ -13471,7 +13441,7 @@
 
 DEFMETHOD (__go_axes__, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __go_axes__ (@var{parent})
+@deftypefn {} {@var{hax} =} __go_axes__ (@var{parent})
 Undocumented internal function.
 @end deftypefn */)
 {
@@ -13480,7 +13450,7 @@
 
 DEFMETHOD (__go_line__, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __go_line__ (@var{parent})
+@deftypefn {} {@var{hl} =} __go_line__ (@var{parent})
 Undocumented internal function.
 @end deftypefn */)
 {
@@ -13489,7 +13459,7 @@
 
 DEFMETHOD (__go_text__, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __go_text__ (@var{parent})
+@deftypefn {} {@var{ht} =} __go_text__ (@var{parent})
 Undocumented internal function.
 @end deftypefn */)
 {
@@ -13498,7 +13468,7 @@
 
 DEFMETHOD (__go_image__, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __go_image__ (@var{parent})
+@deftypefn {} {@var{hi} =} __go_image__ (@var{parent})
 Undocumented internal function.
 @end deftypefn */)
 {
@@ -13507,7 +13477,7 @@
 
 DEFMETHOD (__go_surface__, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __go_surface__ (@var{parent})
+@deftypefn {} {@var{hs} =} __go_surface__ (@var{parent})
 Undocumented internal function.
 @end deftypefn */)
 {
@@ -13516,7 +13486,7 @@
 
 DEFMETHOD (__go_patch__, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __go_patch__ (@var{parent})
+@deftypefn {} {@var{hp} =} __go_patch__ (@var{parent})
 Undocumented internal function.
 @end deftypefn */)
 {
@@ -13525,7 +13495,7 @@
 
 DEFMETHOD (__go_scatter__, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __go_scatter__ (@var{parent})
+@deftypefn {} {@var{hs} =} __go_scatter__ (@var{parent})
 Undocumented internal function.
 @end deftypefn */)
 {
@@ -13534,7 +13504,7 @@
 
 DEFMETHOD (__go_light__, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __go_light__ (@var{parent})
+@deftypefn {} {@var{hl} =} __go_light__ (@var{parent})
 Undocumented internal function.
 @end deftypefn */)
 {
@@ -13543,7 +13513,7 @@
 
 DEFMETHOD (__go_hggroup__, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __go_hggroup__ (@var{parent})
+@deftypefn {} {@var{hgg} =} __go_hggroup__ (@var{parent})
 Undocumented internal function.
 @end deftypefn */)
 {
@@ -13552,7 +13522,7 @@
 
 DEFMETHOD (__go_uimenu__, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __go_uimenu__ (@var{parent})
+@deftypefn {} {@var{hui} =} __go_uimenu__ (@var{parent})
 Undocumented internal function.
 @end deftypefn */)
 {
@@ -13561,7 +13531,7 @@
 
 DEFMETHOD (__go_uicontrol__, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __go_uicontrol__ (@var{parent})
+@deftypefn {} {@var{hui} =} __go_uicontrol__ (@var{parent})
 Undocumented internal function.
 @end deftypefn */)
 {
@@ -13570,7 +13540,7 @@
 
 DEFMETHOD (__go_uibuttongroup__, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __go_uibuttongroup__ (@var{parent})
+@deftypefn {} {@var{hui} =} __go_uibuttongroup__ (@var{parent})
 Undocumented internal function.
 @end deftypefn */)
 {
@@ -13579,7 +13549,7 @@
 
 DEFMETHOD (__go_uipanel__, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __go_uipanel__ (@var{parent})
+@deftypefn {} {@var{hui} =} __go_uipanel__ (@var{parent})
 Undocumented internal function.
 @end deftypefn */)
 {
@@ -13588,7 +13558,7 @@
 
 DEFMETHOD (__go_uicontextmenu__, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __go_uicontextmenu__ (@var{parent})
+@deftypefn {} {@var{hui} =} __go_uicontextmenu__ (@var{parent})
 Undocumented internal function.
 @end deftypefn */)
 {
@@ -13597,7 +13567,7 @@
 
 DEFMETHOD (__go_uitable__, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __go_uitable__ (@var{parent})
+@deftypefn {} {@var{hui} =} __go_uitable__ (@var{parent})
 Undocumented internal function.
 @end deftypefn */)
 {
@@ -13606,7 +13576,7 @@
 
 DEFMETHOD (__go_uitoolbar__, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __go_uitoolbar__ (@var{parent})
+@deftypefn {} {@var{hui} =} __go_uitoolbar__ (@var{parent})
 Undocumented internal function.
 @end deftypefn */)
 {
@@ -13615,7 +13585,7 @@
 
 DEFMETHOD (__go_uipushtool__, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __go_uipushtool__ (@var{parent})
+@deftypefn {} {@var{hui} =} __go_uipushtool__ (@var{parent})
 Undocumented internal function.
 @end deftypefn */)
 {
@@ -13624,7 +13594,7 @@
 
 DEFMETHOD (__go_uitoggletool__, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __go_uitoggletool__ (@var{parent})
+@deftypefn {} {@var{hui} =} __go_uitoggletool__ (@var{parent})
 Undocumented internal function.
 @end deftypefn */)
 {
@@ -13665,7 +13635,7 @@
 
 DEFMETHOD (__go_handles__, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __go_handles__ (@var{show_hidden})
+@deftypefn {} {@var{hg_list} =} __go_handles__ (@var{show_hidden})
 Undocumented internal function.
 @end deftypefn */)
 {
@@ -13683,7 +13653,7 @@
 
 DEFMETHOD (__go_figure_handles__, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __go_figure_handles__ (@var{show_hidden})
+@deftypefn {} {@var{hfig_list} =} __go_figure_handles__ (@var{show_hidden})
 Undocumented internal function.
 @end deftypefn */)
 {
@@ -13800,7 +13770,7 @@
 
 DEFMETHOD (available_graphics_toolkits, interp, , ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} available_graphics_toolkits ()
+@deftypefn {} {@var{toolkits} =} available_graphics_toolkits ()
 Return a cell array of registered graphics toolkits.
 @seealso{graphics_toolkit, register_graphics_toolkit}
 @end deftypefn */)
@@ -13816,8 +13786,11 @@
 
 DEFMETHOD (register_graphics_toolkit, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} register_graphics_toolkit (@var{toolkit})
+@deftypefn {} {} register_graphics_toolkit ("@var{toolkit}")
 List @var{toolkit} as an available graphics toolkit.
+
+Programming Note: No input validation is done on the input string; it is simply
+added to the list of possible graphics toolkits.
 @seealso{available_graphics_toolkits}
 @end deftypefn */)
 {
@@ -13839,7 +13812,7 @@
 
 DEFMETHOD (loaded_graphics_toolkits, interp, , ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} loaded_graphics_toolkits ()
+@deftypefn {} {@var{toolkits} =} loaded_graphics_toolkits ()
 Return a cell array of the currently loaded graphics toolkits.
 @seealso{available_graphics_toolkits}
 @end deftypefn */)
@@ -14253,32 +14226,32 @@
 
 octave_value
 get_property_from_handle (double handle, const std::string& property,
-                          const std::string& func)
-{
-  gh_manager& gh_mgr = octave::__get_gh_manager__ ("get_property_from_handle");
+                          const std::string& fcn)
+{
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   octave::autolock guard (gh_mgr.graphics_lock ());
 
   graphics_object go = gh_mgr.get_object (handle);
 
   if (! go)
-    error ("%s: invalid handle (= %g)", func.c_str (), handle);
+    error ("%s: invalid handle (= %g)", fcn.c_str (), handle);
 
   return go.get (caseless_str (property));
 }
 
 bool
 set_property_in_handle (double handle, const std::string& property,
-                        const octave_value& arg, const std::string& func)
-{
-  gh_manager& gh_mgr = octave::__get_gh_manager__ ("set_property_in_handle");
+                        const octave_value& arg, const std::string& fcn)
+{
+  gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
   octave::autolock guard (gh_mgr.graphics_lock ());
 
   graphics_object go = gh_mgr.get_object (handle);
 
   if (! go)
-    error ("%s: invalid handle (= %g)", func.c_str (), handle);
+    error ("%s: invalid handle (= %g)", fcn.c_str (), handle);
 
   go.set (caseless_str (property), arg);
 
@@ -14321,8 +14294,7 @@
 
       caseless_str pname = c(3).string_value ();
 
-      gh_manager& gh_mgr
-        = octave::__get_gh_manager__ ("do_cleanup_waitfor_listener");
+      gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
       octave::autolock guard (gh_mgr.graphics_lock ());
 
@@ -14364,7 +14336,7 @@
 
           caseless_str pname = args(4).string_value ();
 
-          gh_manager& gh_mgr = octave::__get_gh_manager__ ("waitfor_listener");
+          gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
           octave::autolock guard (gh_mgr.graphics_lock ());
 
--- a/libinterp/corefcn/graphics.in.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/graphics.in.h	Mon Aug 29 13:58:00 2022 +0200
@@ -950,7 +950,8 @@
 
   const std::string& current_value (void) const { return m_current_val; }
 
-  std::string values_as_string (void) const { return m_vals.values_as_string (); }
+  std::string values_as_string (void) const
+  { return m_vals.values_as_string (); }
 
   Cell values_as_cell (void) const { return m_vals.values_as_cell (); }
 
@@ -1378,7 +1379,8 @@
   array_property (void)
     : base_property ("", graphics_handle ()), m_data (Matrix ()),
       m_min_val (), m_max_val (), m_min_pos (), m_max_neg (),
-      m_type_constraints (), m_size_constraints (), m_finite_constraint (NO_CHECK),
+      m_type_constraints (), m_size_constraints (),
+      m_finite_constraint (NO_CHECK),
       m_minval (std::pair<double, bool> (octave_NaN, true)),
       m_maxval (std::pair<double, bool> (octave_NaN, true))
   {
@@ -1389,7 +1391,8 @@
                   const octave_value& m)
     : base_property (nm, h), m_data (m.issparse () ? m.full_value () : m),
       m_min_val (), m_max_val (), m_min_pos (), m_max_neg (),
-      m_type_constraints (), m_size_constraints (), m_finite_constraint (NO_CHECK),
+      m_type_constraints (), m_size_constraints (),
+      m_finite_constraint (NO_CHECK),
       m_minval (std::pair<double, bool> (octave_NaN, true)),
       m_maxval (std::pair<double, bool> (octave_NaN, true))
   {
@@ -1401,8 +1404,10 @@
   // copy constraints.
   array_property (const array_property& p)
     : base_property (p), m_data (p.m_data),
-      m_min_val (p.m_min_val), m_max_val (p.m_max_val), m_min_pos (p.m_min_pos), m_max_neg (p.m_max_neg),
-      m_type_constraints (), m_size_constraints (), m_finite_constraint (NO_CHECK),
+      m_min_val (p.m_min_val), m_max_val (p.m_max_val),
+      m_min_pos (p.m_min_pos), m_max_neg (p.m_max_neg),
+      m_type_constraints (), m_size_constraints (),
+      m_finite_constraint (NO_CHECK),
       m_minval (std::pair<double, bool> (octave_NaN, true)),
       m_maxval (std::pair<double, bool> (octave_NaN, true))
   { }
@@ -3144,6 +3149,17 @@
 
     OCTINTERP_API void adopt (const graphics_handle& h);
 
+    // Alias "innerposition" to "position".
+    octave_value get_innerposition (void) const
+    {
+      return get_position ();
+    }
+
+    void set_innerposition (const octave_value& val)
+    {
+      set_position (val);
+    }
+
     OCTINTERP_API void set_position (const octave_value& val,
                                      bool do_notify_toolkit = true);
 
@@ -3184,9 +3200,10 @@
       string_property currentcharacter r , ""
       handle_property currentobject r , graphics_handle ()
       array_property currentpoint r , Matrix (2, 1, 0)
-      bool_property dockcontrols , "off"
+      bool_property dockcontrols , "on"
       string_property filename , ""
       bool_property graphicssmoothing , "on"
+      array_property innerposition sg , default_figure_position ()
       bool_property integerhandle S , "on"
       bool_property inverthardcopy , "on"
       callback_property keypressfcn , Matrix ()
@@ -3204,7 +3221,7 @@
       array_property papersize U , default_figure_papersize ()
       radio_property papertype SU , "{usletter}|uslegal|a0|a1|a2|a3|a4|a5|b0|b1|b2|b3|b4|b5|arch-a|arch-b|arch-c|arch-d|arch-e|a|b|c|d|e|tabloid|<custom>"
       radio_property paperunits Su , "{inches}|centimeters|normalized|points"
-      radio_property pointer , "crosshair|{arrow}|ibeam|watch|topl|topr|botl|botr|left|top|right|bottom|circle|cross|fleur|custom|hand"
+      radio_property pointer , "{arrow}|crosshair|ibeam|watch|topl|topr|botl|botr|left|top|right|bottom|circle|cross|fleur|custom|hand"
       array_property pointershapecdata , Matrix (16, 16, 1)
       array_property pointershapehotspot , Matrix (1, 2, 1)
       array_property position s , default_figure_position ()
@@ -3225,6 +3242,7 @@
       callback_property windowkeypressfcn , Matrix ()
       callback_property windowkeyreleasefcn , Matrix ()
       callback_property windowscrollwheelfcn , Matrix ()
+      radio_property windowstate , "{normal}|minimized|maximized|fullscreen"
       radio_property windowstyle , "{normal}|modal|docked"
 
       // Overridden base property
@@ -3383,7 +3401,9 @@
   graphics_xform (const Matrix& xm, const Matrix& xim,
                   const scaler& x, const scaler& y, const scaler& z,
                   const Matrix& zl)
-    : m_xform (xm), m_xform_inv (xim), m_sx (x), m_sy (y), m_sz (z), m_zlim (zl) { }
+    : m_xform (xm), m_xform_inv (xim), m_sx (x), m_sy (y),
+      m_sz (z), m_zlim (zl)
+  { }
 
   graphics_xform (const graphics_xform& g)
     : m_xform (g.m_xform), m_xform_inv (g.m_xform_inv), m_sx (g.m_sx),
@@ -3553,7 +3573,10 @@
     OCTINTERP_API void update_title_position (void);
 
     graphics_xform get_transform (void) const
-    { return graphics_xform (m_x_render, m_x_render_inv, m_sx, m_sy, m_sz, m_x_zlim); }
+    {
+      return graphics_xform (m_x_render, m_x_render_inv,
+                             m_sx, m_sy, m_sz, m_x_zlim);
+    }
 
     Matrix get_transform_matrix (void) const { return m_x_render; }
     Matrix get_inverse_transform_matrix (void) const { return m_x_render_inv; }
@@ -3603,7 +3626,10 @@
     bool get_nearhoriz (void) const { return m_nearhoriz; }
 
     ColumnVector pixel2coord (double px, double py) const
-    { return get_transform ().untransform (px, py, (m_x_zlim(0)+m_x_zlim(1))/2); }
+    {
+      return get_transform ().untransform (px, py,
+                                           (m_x_zlim(0)+m_x_zlim(1))/2);
+    }
 
     ColumnVector coord2pixel (double x, double y, double z) const
     { return get_transform ().transform (x, y, z); }
@@ -3766,7 +3792,8 @@
       radio_property gridcolormode , "{auto}|manual"
       radio_property gridlinestyle , "{-}|--|:|-.|none"
       array_property innerposition sg , default_axes_position ()
-      // FIXME: Should be an array of "interaction objects". Make it read-only for now.
+      // FIXME: Should be an array of "interaction objects".
+      // Make it read-only for now.
       any_property interactions r , Matrix ()
       double_property labelfontsizemultiplier u , 1.1
       radio_property layer u , "{bottom}|top"
@@ -3814,6 +3841,7 @@
       bool_property xgrid , "off"
       handle_property xlabel SOf , make_graphics_handle ("text", m___myhandle__, false, false, false)
       row_vector_property xlim mu , default_lim ()
+      radio_property xlimitmethod u , "{tickaligned}|tight|padded"
       radio_property xlimmode al , "{auto}|manual"
       bool_property xminorgrid , "off"
       bool_property xminortick , "off"
@@ -3833,6 +3861,7 @@
       bool_property ygrid , "off"
       handle_property ylabel SOf , make_graphics_handle ("text", m___myhandle__, false, false, false)
       row_vector_property ylim mu , default_lim ()
+      radio_property ylimitmethod u , "{tickaligned}|tight|padded"
       radio_property ylimmode al , "{auto}|manual"
       bool_property yminorgrid , "off"
       bool_property yminortick , "off"
@@ -3850,6 +3879,7 @@
       bool_property zgrid , "off"
       handle_property zlabel SOf , make_graphics_handle ("text", m___myhandle__, false, false, false)
       row_vector_property zlim mu , default_lim ()
+      radio_property zlimitmethod u , "{tickaligned}|tight|padded"
       radio_property zlimmode al , "{auto}|manual"
       bool_property zminorgrid , "off"
       bool_property zminortick , "off"
@@ -4029,7 +4059,8 @@
     {
       calc_ticks_and_lims (m_xlim, m_xtick, m_xminortickvalues,
                            m_xlimmode.is ("auto"), m_xtickmode.is ("auto"),
-                           m_xscale.is ("log"));
+                           m_xscale.is ("log"), m_xlimitmethod.is ("padded"),
+                           m_xlimitmethod.is ("tight"));
       if (m_xticklabelmode.is ("auto"))
         calc_ticklabels (m_xtick, m_xticklabel, m_xscale.is ("log"),
                          xaxislocation_is ("origin"),
@@ -4045,7 +4076,8 @@
     {
       calc_ticks_and_lims (m_ylim, m_ytick, m_yminortickvalues,
                            m_ylimmode.is ("auto"), m_ytickmode.is ("auto"),
-                           m_yscale.is ("log"));
+                           m_yscale.is ("log"), m_ylimitmethod.is ("padded"),
+                           m_ylimitmethod.is ("tight"));
       if (m_yticklabelmode.is ("auto"))
         calc_ticklabels (m_ytick, m_yticklabel, m_yscale.is ("log"),
                          yaxislocation_is ("origin"),
@@ -4061,7 +4093,8 @@
     {
       calc_ticks_and_lims (m_zlim, m_ztick, m_zminortickvalues,
                            m_zlimmode.is ("auto"), m_ztickmode.is ("auto"),
-                           m_zscale.is ("log"));
+                           m_zscale.is ("log"), m_zlimitmethod.is ("padded"),
+                           m_zlimitmethod.is ("tight"));
       if (m_zticklabelmode.is ("auto"))
         calc_ticklabels (m_ztick, m_zticklabel, m_zscale.is ("log"), false,
                          2, m_zlim);
@@ -4109,7 +4142,8 @@
     void update_zticklabelmode (void)
     {
       if (m_zticklabelmode.is ("auto"))
-        calc_ticklabels (m_ztick, m_zticklabel, m_zscale.is ("log"), false, 2, m_zlim);
+        calc_ticklabels (m_ztick, m_zticklabel, m_zscale.is ("log"),
+                         false, 2, m_zlim);
     }
 
     void update_fontname (void)
@@ -4165,7 +4199,8 @@
     OCTINTERP_API void
     calc_ticks_and_lims (array_property& lims, array_property& ticks,
                          array_property& mticks, bool limmode_is_auto,
-                         bool tickmode_is_auto, bool is_logscale);
+                         bool tickmode_is_auto, bool is_logscale,
+                         bool method_is_padded, bool method_is_tight);
     OCTINTERP_API void
     calc_ticklabels (const array_property& ticks, any_property& labels,
                      bool is_logscale, const bool is_origin,
@@ -4214,7 +4249,7 @@
     OCTINTERP_API Matrix
     get_axis_limits (double xmin, double xmax,
                      double min_pos, double max_neg,
-                     const bool logscale);
+                     const bool logscale, const std::string& method);
 
     OCTINTERP_API void
     check_axis_limits (Matrix& limits, const Matrix kids,
@@ -4226,7 +4261,8 @@
 
       calc_ticks_and_lims (m_xlim, m_xtick, m_xminortickvalues,
                            m_xlimmode.is ("auto"), m_xtickmode.is ("auto"),
-                           m_xscale.is ("log"));
+                           m_xscale.is ("log"), m_xlimitmethod.is ("padded"),
+                           m_xlimitmethod.is ("tight"));
       if (m_xticklabelmode.is ("auto"))
         calc_ticklabels (m_xtick, m_xticklabel, m_xscale.is ("log"),
                          m_xaxislocation.is ("origin"),
@@ -4242,13 +4278,19 @@
       update_axes_layout ();
     }
 
+    void update_xlimitmethod ()
+    {
+      update_xlim ();
+    }
+
     void update_ylim (void)
     {
       update_axis_limits ("ylim");
 
       calc_ticks_and_lims (m_ylim, m_ytick, m_yminortickvalues,
                            m_ylimmode.is ("auto"), m_ytickmode.is ("auto"),
-                           m_yscale.is ("log"));
+                           m_yscale.is ("log"), m_ylimitmethod.is ("padded"),
+                           m_ylimitmethod.is ("tight"));
       if (m_yticklabelmode.is ("auto"))
         calc_ticklabels (m_ytick, m_yticklabel, m_yscale.is ("log"),
                          yaxislocation_is ("origin"),
@@ -4264,13 +4306,19 @@
       update_axes_layout ();
     }
 
+    void update_ylimitmethod ()
+    {
+      update_ylim ();
+    }
+
     void update_zlim (void)
     {
       update_axis_limits ("zlim");
 
       calc_ticks_and_lims (m_zlim, m_ztick, m_zminortickvalues,
                            m_zlimmode.is ("auto"), m_ztickmode.is ("auto"),
-                           m_zscale.is ("log"));
+                           m_zscale.is ("log"), m_zlimitmethod.is ("padded"),
+                           m_zlimitmethod.is ("tight"));
       if (m_zticklabelmode.is ("auto"))
         calc_ticklabels (m_ztick, m_zticklabel, m_zscale.is ("log"), false,
                          2, m_zlim);
@@ -4282,6 +4330,11 @@
       update_axes_layout ();
     }
 
+    void update_zlimitmethod ()
+    {
+      update_zlim ();
+    }
+
     void trigger_normals_calc (void);
 
   };
@@ -5753,11 +5806,16 @@
 
     BEGIN_PROPERTIES (uimenu)
       string_property accelerator , ""
-      callback_property callback , Matrix ()
+      // Deprecated in R2017b (replaced by "MenuSelectedFcn")
+      callback_property callback hgs , Matrix ()
       bool_property checked , "off"
       bool_property enable , "on"
       color_property foregroundcolor , color_values (0, 0, 0)
-      string_property label gs , ""
+      // Deprecated in R2017b (replaced by "Text")
+      string_property label hgs , ""
+      callback_property menuselectedfcn , Matrix ()
+      // Deprecated in R2017b, but replacement of re-ordering "children"
+      // property of parent does not work yet in Octave.
       double_property position , 0
       bool_property separator , "off"
       string_property text , ""
@@ -5767,7 +5825,7 @@
       any_property __object__ h , Matrix ()
     END_PROPERTIES
 
-    // Redirect calls from "Label" to "Text".
+    // Make "Label" an alias for "Text".
     std::string get_label (void) const
     {
       return get_text ();
@@ -5778,6 +5836,17 @@
       set_text (val);
     }
 
+    // Make "Callback" an alias for "MenuSelectedFcn".
+    octave_value get_callback (void) const
+    {
+      return get_menuselectedfcn ();
+    }
+
+    void set_callback (const octave_value& val)
+    {
+      set_menuselectedfcn (val);
+    }
+
   protected:
     void init (void)
     {
@@ -6526,10 +6595,10 @@
 
 OCTINTERP_API octave_value
 get_property_from_handle (double handle, const std::string& property,
-                          const std::string& func);
+                          const std::string& fcn);
 OCTINTERP_API bool
 set_property_in_handle (double handle, const std::string& property,
-                        const octave_value& arg, const std::string& func);
+                        const octave_value& arg, const std::string& fcn);
 
 // ---------------------------------------------------------------------
 
--- a/libinterp/corefcn/gzfstream.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/gzfstream.h	Mon Aug 29 13:58:00 2022 +0200
@@ -469,7 +469,7 @@
 private:
   // Underlying manipulator function
   gzofstream&
-  (*func)(gzofstream&, T1, T2);
+  (*fcn)(gzofstream&, T1, T2);
 
   // Arguments for manipulator function
   T1 val1;
@@ -490,14 +490,14 @@
 gzomanip2<T1, T2>::gzomanip2 (gzofstream &(*f)(gzofstream&, T1, T2),
                               T1 v1,
                               T2 v2)
-  : func(f), val1(v1), val2(v2)
+  : fcn(f), val1(v1), val2(v2)
 { }
 
 // Insertor applies underlying manipulator function to stream
 template <typename T1, typename T2>
 inline gzofstream&
 operator<<(gzofstream& s, const gzomanip2<T1, T2>& m)
-{ return (*m.func)(s, m.val1, m.val2); }
+{ return (*m.fcn)(s, m.val1, m.val2); }
 
 // Insert this onto stream to simplify setting of compression level
 inline gzomanip2<int, int>
--- a/libinterp/corefcn/hash.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/hash.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -53,9 +53,9 @@
 
 DEFUN (hash, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} hash (@var{hfun}, @var{str})
+@deftypefn {} {@var{hashval} =} hash ("@var{hashfcn}", @var{str})
 Calculate the hash value of the string @var{str} using the hash function
-@var{hfun}.
+@var{hashfcn}.
 
 The available hash functions are given in the table below.
 
@@ -206,18 +206,19 @@
 %!assert <*31689> (hash ("md2", "abc\0"), "5a636d615002a7874ac1c9e9a43361f7")
 %!assert <*31689> (hash ("md4", "abc\0"), "0ee5201897ecb206c4eaba1d2da5224d")
 %!assert <*31689> (hash ("md5", "abc\0"), "147a664a2ca9410911e61986d3f0d52a")
-%!assert <*31689> (hash ("sha1", "abc\0"), "686483805ac47ca14e03514f7481a7973b401762")
+%!assert <*31689> (hash ("sha1", "abc\0"),
+%!                 "686483805ac47ca14e03514f7481a7973b401762")
 %!assert <*31689> (hash ("sha224", "abc\0"),
-%!        "fbc8e47920e108bb1d0b631d18b36ae9b1549d28362aa15ebe960cfb");
+%!                 "fbc8e47920e108bb1d0b631d18b36ae9b1549d28362aa15ebe960cfb");
 %!assert <*31689> (hash ("sha256", "abc\0"),
-%!        "dc1114cd074914bd872cc1f9a23ec910ea2203bc79779ab2e17da25782a624fc");
+%!       "dc1114cd074914bd872cc1f9a23ec910ea2203bc79779ab2e17da25782a624fc");
 %!assert <*31689> (hash ("sha384", "abc\0"),
-%!        ["eba81f2dfba4ec60d3f786c89d91b08e6c0b63d55986874378e385", ...
-%!         "e6fac587cce7a520ca9437290fe626cbf75c855e17"]);
+%!       ["eba81f2dfba4ec60d3f786c89d91b08e6c0b63d55986874378e385", ...
+%!        "e6fac587cce7a520ca9437290fe626cbf75c855e17"]);
 %!assert <*31689> (hash ("sha512", "abc\0"),
-%!        ["7ce05eda233e545a2d5c626862a5ddaafb09b9d8ec3bec08aa458b", ...
-%!         "7c9e7d939d84a57d5a20d8a9002983aabae2457b19c50ba326bf5b", ...
-%!         "081f75b41342f42c3383"]);
+%!       ["7ce05eda233e545a2d5c626862a5ddaafb09b9d8ec3bec08aa458b", ...
+%!        "7c9e7d939d84a57d5a20d8a9002983aabae2457b19c50ba326bf5b", ...
+%!        "081f75b41342f42c3383"]);
 
 ## Test equivalence to deprecated md5sum offering file hashing
 %!test
--- a/libinterp/corefcn/help.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/help.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -637,7 +637,8 @@
             std::string name;
             int i = 0;
             int c;
-            while (file && (c = file.get ()) != std::istream::traits_type::eof ())
+            while (file
+                   && (c = file.get ()) != std::istream::traits_type::eof ())
               {
                 if (c == '\n' || c == '\r')
                   {
@@ -726,7 +727,7 @@
 
   string_vector make_name_list (void)
   {
-    help_system& help_sys = __get_help_system__ ("make_name_list");
+    help_system& help_sys = __get_help_system__ ();
 
     return help_sys.make_name_list ();
   }
@@ -785,8 +786,8 @@
 
 DEFUN (__operators__, , ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} __operators__ ()
-Undocumented internal function.
+@deftypefn {} {@var{cstr} =} __operators__ ()
+Return a cell array of strings of all possible Octave operators.
 @end deftypefn */)
 {
   return ovl (Cell (operator_names));
@@ -803,7 +804,7 @@
 DEFMETHOD (__builtins__, interp, , ,
            doc: /* -*- texinfo -*-
 @deftypefn {} {} __builtins__ ()
-Undocumented internal function.
+Return a cell array of all builtin (compiled) functions available to Octave.
 @end deftypefn */)
 {
   symbol_table& symtab = interp.get_symbol_table ();
@@ -815,7 +816,7 @@
 
 DEFMETHOD (localfunctions, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} localfunctions ()
+@deftypefn {} {@var{subfcn_list} =} localfunctions ()
 Return a list of all local functions, i.e., subfunctions, within the current
 file.
 
@@ -871,7 +872,7 @@
 
 DEFMETHOD (__which__, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __which__ (@var{name}, @dots{})
+@deftypefn {} {@var{var_struct} =} __which__ (@var{name}, @dots{})
 Undocumented internal function.
 @end deftypefn */)
 {
@@ -954,7 +955,7 @@
            doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} built_in_docstrings_file ()
 @deftypefnx {} {@var{old_val} =} built_in_docstrings_file (@var{new_val})
-@deftypefnx {} {} built_in_docstrings_file (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} built_in_docstrings_file (@var{new_val}, "local")
 Query or set the internal variable that specifies the name of the
 file containing docstrings for built-in Octave functions.
 
@@ -979,7 +980,7 @@
            doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} doc_cache_file ()
 @deftypefnx {} {@var{old_val} =} doc_cache_file (@var{new_val})
-@deftypefnx {} {} doc_cache_file (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} doc_cache_file (@var{new_val}, "local")
 Query or set the internal variable that specifies the name of the
 Octave documentation cache file.
 
@@ -1008,7 +1009,7 @@
            doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} info_file ()
 @deftypefnx {} {@var{old_val} =} info_file (@var{new_val})
-@deftypefnx {} {} info_file (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} info_file (@var{new_val}, "local")
 Query or set the internal variable that specifies the name of the
 Octave info file.
 
@@ -1034,7 +1035,7 @@
            doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} info_program ()
 @deftypefnx {} {@var{old_val} =} info_program (@var{new_val})
-@deftypefnx {} {} info_program (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} info_program (@var{new_val}, "local")
 Query or set the internal variable that specifies the name of the
 info program to run.
 
@@ -1057,7 +1058,7 @@
            doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} makeinfo_program ()
 @deftypefnx {} {@var{old_val} =} makeinfo_program (@var{new_val})
-@deftypefnx {} {} makeinfo_program (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} makeinfo_program (@var{new_val}, "local")
 Query or set the internal variable that specifies the name of the
 program that Octave runs to format help text containing
 Texinfo markup commands.
@@ -1079,7 +1080,7 @@
            doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} suppress_verbose_help_message ()
 @deftypefnx {} {@var{old_val} =} suppress_verbose_help_message (@var{new_val})
-@deftypefnx {} {} suppress_verbose_help_message (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} suppress_verbose_help_message (@var{new_val}, "local")
 Query or set the internal variable that controls whether Octave
 will add additional help information to the end of the output from
 the @code{help} command and usage messages for built-in commands.
@@ -1098,7 +1099,7 @@
            doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} texi_macros_file ()
 @deftypefnx {} {@var{old_val} =} texi_macros_file (@var{new_val})
-@deftypefnx {} {} texi_macros_file (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} texi_macros_file (@var{new_val}, "local")
 Query or set the internal variable that specifies the name of the
 file containing Texinfo macros that are prepended to documentation strings
 before they are passed to makeinfo.
--- a/libinterp/corefcn/hex2num.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/hex2num.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -361,8 +361,10 @@
 }
 
 /*
-%!assert (num2hex (-2:2), ["c000000000000000";"bff0000000000000";"0000000000000000";"3ff0000000000000";"4000000000000000"])
-%!assert (num2hex (single (-2:2)), ["c0000000";"bf800000";"00000000";"3f800000";"40000000"])
+%!assert (num2hex (-2:2),
+%!        ["c000000000000000";"bff0000000000000";"0000000000000000";"3ff0000000000000";"4000000000000000"])
+%!assert (num2hex (single (-2:2)),
+%!        ["c0000000";"bf800000";"00000000";"3f800000";"40000000"])
 %!assert (num2hex (intmax ("uint8")), "ff")
 %!assert (num2hex (intmax ("uint16")), "ffff")
 %!assert (num2hex (intmax ("uint32")), "ffffffff")
--- a/libinterp/corefcn/input.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/input.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -44,6 +44,7 @@
 #include "file-ops.h"
 #include "iconv-wrappers.h"
 #include "localcharset-wrapper.h"
+#include "oct-env.h"
 #include "oct-string.h"
 #include "quit.h"
 #include "str-vec.h"
@@ -89,11 +90,6 @@
 // the next user prompt.
 bool Vdrawnow_requested = false;
 
-// TRUE if we are recording line numbers in a source file.
-// Always true except when debugging and taking input directly from
-// the terminal.
-bool Vtrack_line_num = true;
-
 OCTAVE_NAMESPACE_BEGIN
 
   static std::string
@@ -183,8 +179,7 @@
         if (pos != std::string::npos)
           base_name = base_name.substr (0, pos);
 
-        interpreter& interp
-          = __get_interpreter__ ("generate_struct_completions");
+        interpreter& interp = __get_interpreter__ ();
 
         if (interp.is_variable (base_name))
           {
@@ -377,8 +372,7 @@
                   }
                 else
                   {
-                    input_system& input_sys
-                      = __get_input_system__ ("generate_completion");
+                    input_system& input_sys = __get_input_system__ ();
 
                     command_editor::set_completion_append_character
                       (input_sys.completion_append_char ());
@@ -396,8 +390,7 @@
   {
     octave_quit ();
 
-    input_system& input_sys
-      = __get_input_system__ ("internal_input_event_hook_fcn");
+    input_system& input_sys = __get_input_system__ ();
 
     input_sys.run_input_event_hooks ();
 
@@ -581,8 +574,10 @@
   std::string input_system::dir_encoding (const std::string& dir)
   {
     std::string enc = m_mfile_encoding;
+    // use canonicalized path as key
+    const std::string key = sys::canonicalize_file_name (dir);
 
-    auto enc_it = m_dir_encoding.find (load_path_dir (dir));
+    auto enc_it = m_dir_encoding.find (key);
     if (enc_it != m_dir_encoding.end ())
       enc = enc_it->second;
 
@@ -966,7 +961,8 @@
     : m_rep (new file_reader (interp, file))
   { }
 
-  input_reader::input_reader (interpreter& interp, FILE *file, const std::string& enc)
+  input_reader::input_reader (interpreter& interp, FILE *file,
+                              const std::string& enc)
     : m_rep (new file_reader (interp, file, enc))
   { }
 
@@ -1252,13 +1248,24 @@
 
 DEFUN (completion_matches, args, nargout,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} completion_matches (@var{hint})
-Generate possible completions given @var{hint}.
+@deftypefn {} {@var{completion_list} =} completion_matches ("@var{hint}")
+Generate possible word completions for Octave given the character sequence
+@var{hint}.
+
+This function is provided for the benefit of programs like Emacs which might be
+controlling Octave and handling user input.  For example:
 
-This function is provided for the benefit of programs like Emacs which
-might be controlling Octave and handling user input.  The current
-command number is not incremented when this function is called.  This is
-a feature, not a bug.
+@example
+@group
+completion_matches ("sine")
+@result{}
+sinetone
+sinewave
+@end group
+@end example
+
+Programming Note: The current command number in Octave is not incremented when
+this function is called.  This is a feature, not a bug.
 @end deftypefn */)
 {
   if (args.length () != 1)
@@ -1336,7 +1343,8 @@
 
 DEFUN (readline_read_init_file, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} readline_read_init_file (@var{file})
+@deftypefn  {} {} readline_read_init_file ()
+@deftypefnx {} {} readline_read_init_file (@var{file})
 Read the readline library initialization file @var{file}.
 
 If @var{file} is omitted, read the default initialization file
@@ -1453,7 +1461,7 @@
            doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} PS1 ()
 @deftypefnx {} {@var{old_val} =} PS1 (@var{new_val})
-@deftypefnx {} {} PS1 (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} PS1 (@var{new_val}, "local")
 Query or set the primary prompt string.
 
 When executing interactively, Octave displays the primary prompt when it is
@@ -1497,7 +1505,7 @@
            doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} PS2 ()
 @deftypefnx {} {@var{old_val} =} PS2 (@var{new_val})
-@deftypefnx {} {} PS2 (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} PS2 (@var{new_val}, "local")
 Query or set the secondary prompt string.
 
 The secondary prompt is printed when Octave is expecting additional input to
@@ -1521,7 +1529,7 @@
            doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} completion_append_char ()
 @deftypefnx {} {@var{old_val} =} completion_append_char (@var{new_val})
-@deftypefnx {} {} completion_append_char (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} completion_append_char (@var{new_val}, "local")
 Query or set the internal character variable that is appended to
 successful command-line completion attempts.
 
@@ -1559,7 +1567,7 @@
 
 DEFMETHOD (__gud_mode__, interp, args, nargout,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __gud_mode__ ()
+@deftypefn {} {@var{state} =} __gud_mode__ ()
 Undocumented internal function.
 @end deftypefn */)
 {
@@ -1570,8 +1578,12 @@
 
 DEFMETHOD (__mfile_encoding__, interp, args, nargout,
            doc: /* -*- texinfo -*-
-@deftypefn {} {@var{current_encoding} =} __mfile_encoding__ (@var{new_encoding})
-Set and query the codepage that is used for reading .m files.
+@deftypefn  {} {@var{current_encoding} =} __mfile_encoding__ ()
+@deftypefnx {} {} __mfile_encoding__ (@var{new_encoding})
+@deftypefnx {} {@var{old_encoding} =} __mfile_encoding__ (@var{new_encoding})
+Query or set the codepage that is used for reading m-files.
+
+The input and output are strings naming a particular codepage, e.g., "utf-8".
 @end deftypefn */)
 {
   input_system& input_sys = interp.get_input_system ();
@@ -1582,22 +1594,22 @@
 DEFMETHOD (dir_encoding, interp, args, nargout,
            doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{current_encoding} =} dir_encoding (@var{dir})
-@deftypefnx {} {@var{prev_encoding} =} dir_encoding (@var{dir}, @var{encoding})
-@deftypefnx {} {} dir_encoding (@dots{})
-Set and query the @var{encoding} that is used for reading m-files in @var{dir}.
+@deftypefnx {} {} dir_encoding (@var{dir}, @var{new_encoding})
+@deftypefnx {} {} dir_encoding (@var{dir}, "delete")
+@deftypefnx {} {@var{old_encoding} =} dir_encoding (@var{dir}, @var{new_encoding})
+Query or set the @var{encoding} that is used for reading m-files in @var{dir}.
 
-That encoding overrides the (globally set) m-file encoding.
+The per-directory encoding overrides the (globally set) m-file encoding.
 
-The string @var{DIR} must match the form how the directory would appear in the
-load path.
+The string @var{DIR} must match how the directory would appear in the load
+path.
 
-The @var{encoding} must be a valid encoding identifier or @qcode{"delete"}.  In
-the latter case, the (globally set) m-file encoding will be used for the given
-@var{dir}.
+The @var{new_encoding} input must be a valid encoding identifier or
+@qcode{"delete"}.  In the latter case, any per-directory encoding is removed
+and the (globally set) m-file encoding will be used for the given @var{dir}.
 
-The currently or previously used encoding is returned in @var{current_encoding}
-or @var{prev_encoding}, respectively.  The output argument must be explicitly
-requested.
+The currently or previously used encoding is returned only if an output
+argument is requested.
 
 The directory encoding is automatically read from the file @file{.oct-config}
 when a new path is added to the load path (for example with @code{addpath}).
@@ -1650,7 +1662,7 @@
            doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} auto_repeat_debug_command ()
 @deftypefnx {} {@var{old_val} =} auto_repeat_debug_command (@var{new_val})
-@deftypefnx {} {} auto_repeat_debug_command (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} auto_repeat_debug_command (@var{new_val}, "local")
 Query or set the internal variable that controls whether debugging
 commands are automatically repeated when the input line is empty (typing
 just @key{RET}).
--- a/libinterp/corefcn/input.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/input.h	Mon Aug 29 13:58:00 2022 +0200
@@ -48,11 +48,6 @@
 // the next user prompt.
 extern OCTINTERP_API bool Vdrawnow_requested;
 
-#if defined (OCTAVE_PROVIDE_DEPRECATED_SYMBOLS)
-OCTAVE_DEPRECATED (6, "'Vtrack_line_num' is an obsolete internal variable; any uses should be removed")
-extern OCTINTERP_API bool Vtrack_line_num;
-#endif
-
 extern OCTINTERP_API octave::sys::time Vlast_prompt_time;
 
 class octave_value;
--- a/libinterp/corefcn/interpreter-private.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/interpreter-private.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -27,6 +27,7 @@
 #  include "config.h"
 #endif
 
+#include <iostream>
 #include <list>
 #include <string>
 
@@ -50,151 +51,151 @@
 
 namespace octave
 {
-  interpreter& __get_interpreter__ (const std::string& who)
+  interpreter& __get_interpreter__ (void)
   {
     interpreter *interp = interpreter::the_interpreter ();
 
     if (! interp)
       {
+        std::cerr << "fatal error: octave interpreter context missing" << std::endl;
         abort ();
-        error ("%s: interpreter context missing", who.c_str ());
       }
 
     return *interp;
   }
 
-  dynamic_loader& __get_dynamic_loader__ (const std::string& who)
+  dynamic_loader& __get_dynamic_loader__ (void)
   {
-    interpreter& interp = __get_interpreter__ (who);
+    interpreter& interp = __get_interpreter__ ();
 
     return interp.get_dynamic_loader ();
   }
 
-  error_system& __get_error_system__ (const std::string& who)
+  error_system& __get_error_system__ (void)
   {
-    interpreter& interp = __get_interpreter__ (who);
+    interpreter& interp = __get_interpreter__ ();
 
     return interp.get_error_system ();
   }
 
-  gh_manager& __get_gh_manager__ (const std::string& who)
+  gh_manager& __get_gh_manager__ (void)
   {
-    interpreter& interp = __get_interpreter__ (who);
+    interpreter& interp = __get_interpreter__ ();
 
     return interp.get_gh_manager ();
   }
 
-  help_system& __get_help_system__ (const std::string& who)
+  help_system& __get_help_system__ (void)
   {
-    interpreter& interp = __get_interpreter__ (who);
+    interpreter& interp = __get_interpreter__ ();
 
     return interp.get_help_system ();
   }
 
-  input_system& __get_input_system__ (const std::string& who)
+  input_system& __get_input_system__ (void)
   {
-    interpreter& interp = __get_interpreter__ (who);
+    interpreter& interp = __get_interpreter__ ();
 
     return interp.get_input_system ();
   }
 
-  output_system& __get_output_system__ (const std::string& who)
+  output_system& __get_output_system__ (void)
   {
-    interpreter& interp = __get_interpreter__ (who);
+    interpreter& interp = __get_interpreter__ ();
 
     return interp.get_output_system ();
   }
 
-  load_path& __get_load_path__ (const std::string& who)
+  load_path& __get_load_path__ (void)
   {
-    interpreter& interp = __get_interpreter__ (who);
+    interpreter& interp = __get_interpreter__ ();
 
     return interp.get_load_path ();
   }
 
-  load_save_system& __get_load_save_system__ (const std::string& who)
+  load_save_system& __get_load_save_system__ (void)
   {
-    interpreter& interp = __get_interpreter__ (who);
+    interpreter& interp = __get_interpreter__ ();
 
     return interp.get_load_save_system ();
   }
 
-  event_manager& __get_event_manager__ (const std::string& who)
+  event_manager& __get_event_manager__ (void)
   {
-    interpreter& interp = __get_interpreter__ (who);
+    interpreter& interp = __get_interpreter__ ();
 
     return interp.get_event_manager ();
   }
 
-  type_info& __get_type_info__ (const std::string& who)
+  type_info& __get_type_info__ (void)
   {
-    interpreter& interp = __get_interpreter__ (who);
+    interpreter& interp = __get_interpreter__ ();
 
     return interp.get_type_info ();
   }
 
-  symbol_table& __get_symbol_table__ (const std::string& who)
+  symbol_table& __get_symbol_table__ (void)
   {
-    interpreter& interp = __get_interpreter__ (who);
+    interpreter& interp = __get_interpreter__ ();
 
     return interp.get_symbol_table ();
   }
 
-  symbol_scope __get_current_scope__ (const std::string& who)
+  symbol_scope __get_current_scope__ (void)
   {
-    interpreter& interp = __get_interpreter__ (who);
+    interpreter& interp = __get_interpreter__ ();
 
     return interp.get_current_scope ();
   }
 
-  symbol_scope __require_current_scope__ (const std::string& who)
+  symbol_scope __require_current_scope__ (void)
   {
-    symbol_scope scope = __get_current_scope__ (who);
+    symbol_scope scope = __get_current_scope__ ();
 
     if (! scope)
-      error ("%s: symbol table scope missing", who.c_str ());
+      error ("__require_current_scope__: symbol table scope missing");
 
     return scope;
   }
 
-  tree_evaluator& __get_evaluator__ (const std::string& who)
+  tree_evaluator& __get_evaluator__ (void)
   {
-    interpreter& interp = __get_interpreter__ (who);
+    interpreter& interp = __get_interpreter__ ();
 
     return interp.get_evaluator ();
   }
 
-  bp_table& __get_bp_table__ (const std::string& who)
+  bp_table& __get_bp_table__ (void)
   {
-    tree_evaluator& tw = __get_evaluator__ (who);
+    tree_evaluator& tw = __get_evaluator__ ();
 
     return tw.get_bp_table ();
   }
 
-  child_list& __get_child_list__ (const std::string& who)
+  child_list& __get_child_list__ (void)
   {
-    interpreter& interp = __get_interpreter__ (who);
+    interpreter& interp = __get_interpreter__ ();
 
     return interp.get_child_list ();
   }
 
-  cdef_manager& __get_cdef_manager__ (const std::string& who)
+  cdef_manager& __get_cdef_manager__ (void)
   {
-    interpreter& interp = __get_interpreter__ (who);
+    interpreter& interp = __get_interpreter__ ();
 
     return interp.get_cdef_manager ();
   }
 
-  display_info& __get_display_info__ (const std::string& who)
+  display_info& __get_display_info__ (void)
   {
-    interpreter& interp = __get_interpreter__ (who);
+    interpreter& interp = __get_interpreter__ ();
 
     return interp.get_display_info ();
   }
 
-  gtk_manager& __get_gtk_manager__ (const std::string& who)
+  gtk_manager& __get_gtk_manager__ (void)
   {
-    interpreter& interp = __get_interpreter__ (who);
+    interpreter& interp = __get_interpreter__ ();
 
     return interp.get_gtk_manager ();
   }
--- a/libinterp/corefcn/interpreter-private.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/interpreter-private.h	Mon Aug 29 13:58:00 2022 +0200
@@ -53,45 +53,45 @@
   class tree_evaluator;
   class type_info;
 
-  extern OCTINTERP_API interpreter& __get_interpreter__ (const std::string& who);
+  extern OCTINTERP_API interpreter& __get_interpreter__ (void);
 
-  extern OCTINTERP_API dynamic_loader& __get_dynamic_loader__ (const std::string& who);
+  extern OCTINTERP_API dynamic_loader& __get_dynamic_loader__ (void);
 
-  extern OCTINTERP_API error_system& __get_error_system__ (const std::string& who);
+  extern OCTINTERP_API error_system& __get_error_system__ (void);
 
-  extern OCTINTERP_API gh_manager& __get_gh_manager__ (const std::string& who);
+  extern OCTINTERP_API gh_manager& __get_gh_manager__ (void);
 
-  extern OCTINTERP_API help_system& __get_help_system__ (const std::string& who);
+  extern OCTINTERP_API help_system& __get_help_system__ (void);
 
-  extern OCTINTERP_API input_system& __get_input_system__ (const std::string& who);
+  extern OCTINTERP_API input_system& __get_input_system__ (void);
 
-  extern OCTINTERP_API load_path& __get_load_path__ (const std::string& who);
+  extern OCTINTERP_API load_path& __get_load_path__ (void);
 
-  extern OCTINTERP_API load_save_system& __get_load_save_system__ (const std::string& who);
+  extern OCTINTERP_API load_save_system& __get_load_save_system__ (void);
 
-  extern OCTINTERP_API event_manager& __get_event_manager__ (const std::string& who);
+  extern OCTINTERP_API event_manager& __get_event_manager__ (void);
 
-  extern OCTINTERP_API output_system& __get_output_system__ (const std::string& who);
+  extern OCTINTERP_API output_system& __get_output_system__ (void);
 
-  extern OCTINTERP_API type_info& __get_type_info__ (const std::string& who);
+  extern OCTINTERP_API type_info& __get_type_info__ (void);
 
-  extern OCTINTERP_API symbol_table& __get_symbol_table__ (const std::string& who);
+  extern OCTINTERP_API symbol_table& __get_symbol_table__ (void);
 
-  extern OCTINTERP_API symbol_scope __get_current_scope__ (const std::string& who);
+  extern OCTINTERP_API symbol_scope __get_current_scope__ (void);
 
-  extern OCTINTERP_API symbol_scope __require_current_scope__ (const std::string& who);
+  extern OCTINTERP_API symbol_scope __require_current_scope__ (void);
 
-  extern OCTINTERP_API tree_evaluator& __get_evaluator__ (const std::string& who);
+  extern OCTINTERP_API tree_evaluator& __get_evaluator__ (void);
 
-  extern OCTINTERP_API bp_table& __get_bp_table__ (const std::string& who);
+  extern OCTINTERP_API bp_table& __get_bp_table__ (void);
 
-  extern OCTINTERP_API child_list& __get_child_list__ (const std::string& who);
+  extern OCTINTERP_API child_list& __get_child_list__ (void);
 
-  extern OCTINTERP_API cdef_manager& __get_cdef_manager__ (const std::string& who);
+  extern OCTINTERP_API cdef_manager& __get_cdef_manager__ (void);
 
-  extern OCTINTERP_API display_info& __get_display_info__ (const std::string& who);
+  extern OCTINTERP_API display_info& __get_display_info__ (void);
 
-  extern OCTINTERP_API gtk_manager& __get_gtk_manager__ (const std::string& who);
+  extern OCTINTERP_API gtk_manager& __get_gtk_manager__ (void);
 
   // Functions that could be methods in the interpreter class but maybe
   // shouldn't be exposed as part of the public interface.
--- a/libinterp/corefcn/interpreter.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/interpreter.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -56,7 +56,6 @@
 #include "display.h"
 #include "error.h"
 #include "event-manager.h"
-#include "file-io.h"
 #include "graphics.h"
 #include "help.h"
 #include "input.h"
@@ -237,7 +236,9 @@
 DEFMETHOD (atexit, interp, args, nargout,
            doc: /* -*- texinfo -*-
 @deftypefn  {} {} atexit (@var{fcn})
-@deftypefnx {} {} atexit (@var{fcn}, @var{flag})
+@deftypefnx {} {} atexit (@var{fcn}, true)
+@deftypefnx {} {} atexit (@var{fcn}, false)
+@deftypefnx {} {@var{status} =} atexit (@var{fcn}, false)
 Register a function to be called when Octave exits.
 
 For example,
@@ -268,8 +269,12 @@
 will remove the function from the list and Octave will not call
 @code{last_words} when it exits.
 
-Note that @code{atexit} only removes the first occurrence of a function
-from the list, so if a function was placed in the list multiple times with
+The optional output @var{status} is only available when unregistering a
+function.  The value is true if the unregistering was succesful and false
+otherwise.
+
+Progamming Note: @code{atexit} only removes the first occurrence of a function
+from the list; if a function was placed in the list multiple times with
 @code{atexit}, it must also be removed from the list multiple times.
 @seealso{quit}
 @end deftypefn */)
@@ -302,8 +307,8 @@
 
 DEFMETHOD (__traditional__, interp, , ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __traditional__ ()
-Undocumented internal function.
+@deftypefn {} {@var{tf} =} __traditional__ ()
+Return true if Octave was invoked with the @env{--traditional} option.
 @end deftypefn */)
 {
   return ovl (interp.traditional ());
@@ -344,7 +349,7 @@
                                bool verbose = false,
                                bool require_file = true)
   {
-    interpreter& interp = __get_interpreter__ ("safe_source_file");
+    interpreter& interp = __get_interpreter__ ();
 
     try
       {
@@ -2028,24 +2033,6 @@
     return found;
   }
 
-  // Remove when corresponding public deprecated function is removed.
-  void interpreter::add_atexit_function_deprecated (const std::string& fname)
-  {
-    interpreter& interp
-      = __get_interpreter__ ("interpreter::add_atexit_function");
-
-    interp.add_atexit_fcn (fname);
-  }
-
-  // Remove when corresponding public deprecated function is removed.
-  bool interpreter::remove_atexit_function_deprecated (const std::string& fname)
-  {
-    interpreter& interp
-      = __get_interpreter__ ("interpreter::remove_atexit_function");
-
-    return interp.remove_atexit_fcn (fname);
-  }
-
   // What internal options get configured by --traditional.
 
   void interpreter::maximum_braindamage (void)
--- a/libinterp/corefcn/interpreter.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/interpreter.h	Mon Aug 29 13:58:00 2022 +0200
@@ -536,30 +536,6 @@
 
     bool remove_atexit_fcn (const std::string& fname);
 
-  private:
-
-    // Remove when corresponding public deprecated function is removed.
-    static void add_atexit_function_deprecated (const std::string& fname);
-
-    // Remove when corresponding public deprecated function is removed.
-    static bool remove_atexit_function_deprecated (const std::string& fname);
-
-  public:
-
-#if defined (OCTAVE_PROVIDE_DEPRECATED_SYMBOLS)
-    OCTAVE_DEPRECATED (6, "use interpreter::add_atexit_fcn member function instead")
-    static void add_atexit_function (const std::string& fname)
-    {
-      add_atexit_function_deprecated (fname);
-    }
-
-    OCTAVE_DEPRECATED (6, "use interpreter::remove_atexit_fcn member function instead")
-    static bool remove_atexit_function (const std::string& fname)
-    {
-      return remove_atexit_function_deprecated (fname);
-    }
-    #endif
-
     static interpreter * the_interpreter (void) { return m_instance; }
 
   private:
--- a/libinterp/corefcn/inv.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/inv.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -70,11 +70,14 @@
 
   octave_value arg = args(0);
 
+  if (! arg.isnumeric ())
+    err_wrong_type_arg ("inv", arg);
+
   if (arg.isempty ())
     return ovl (Matrix ());
 
   if (arg.rows () != arg.columns ())
-    err_square_matrix_required ("inverse", "A");
+    err_square_matrix_required ("inv", "A");
 
   octave_value result;
   octave_idx_type info;
@@ -191,6 +194,8 @@
             }
         }
       else
+        // Shouldn't get here since we checked for suitable arg earlier.
+        // Maybe for some user-defined classes?
         err_wrong_type_arg ("inv", arg);
     }
 
@@ -233,6 +238,12 @@
 %! assert (xinv, single ([-2, 1; 1.5, -0.5]), 5*eps ("single"));
 %! assert (isa (rcond, "single"));
 
+## Basic test for integer inputs
+%!assert (inv (int32 (2)), 0.5)
+%!assert (inv (uint32 (2)), 0.5)
+%!assert (inv (int64 (2)), 0.5)
+%!assert (inv (uint64 (2)), 0.5)
+
 ## Normal scalar cases
 %!assert (inv (2), 0.5)
 %!test
@@ -367,11 +378,15 @@
 %! assert (A, sparse ([Inf, Inf; 0, 0]));
 
 %!testif HAVE_UMFPACK <*56232>
-%! fail ("A = inv (sparse ([1, 0, 0; 0, 0, 0; 0, 0, 1]))", "warning", "matrix singular");
+%! fail ("A = inv (sparse ([1, 0, 0; 0, 0, 0; 0, 0, 1]))",
+%!       "warning", "matrix singular");
 %! assert (A, sparse ([Inf, 0, 0; 0, 0, 0; 0, 0, Inf]));
 
-%!error inv ()
-%!error inv ([1, 2; 3, 4], 2)
+%!error <Invalid call> inv ()
+%!error <Invalid call> inv ([1, 2; 3, 4], 2)
+%!error <wrong type argument> inv ("Hello World")
+%!error <wrong type argument> inv ({1})
+%!error <wrong type argument> inv (true)
 %!error <must be a square matrix> inv ([1, 2; 3, 4; 5, 6])
 %!error <inverse of the null matrix not defined> inv (sparse (2, 2, 0))
 %!error <inverse of the null matrix not defined> inv (diag ([0, 0]))
--- a/libinterp/corefcn/kron.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/kron.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -55,8 +55,8 @@
 static MArray<T>
 kron (const MArray<R>& a, const MArray<T>& b)
 {
-  assert (a.ndims () == 2);
-  assert (b.ndims () == 2);
+  error_unless (a.ndims () == 2);
+  error_unless (b.ndims () == 2);
 
   octave_idx_type nra = a.rows ();
   octave_idx_type nrb = b.rows ();
@@ -86,7 +86,7 @@
 static MArray<T>
 kron (const MDiagArray2<R>& a, const MArray<T>& b)
 {
-  assert (b.ndims () == 2);
+  error_unless (b.ndims () == 2);
 
   octave_idx_type nra = a.rows ();
   octave_idx_type nrb = b.rows ();
@@ -245,14 +245,14 @@
 
 DEFUN (kron, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} kron (@var{A}, @var{B})
-@deftypefnx {} {} kron (@var{A1}, @var{A2}, @dots{})
+@deftypefn  {} {@var{C} =} kron (@var{A}, @var{B})
+@deftypefnx {} {@var{C} =} kron (@var{A1}, @var{A2}, @dots{})
 Form the Kronecker product of two or more matrices.
 
 This is defined block by block as
 
 @example
-x = [ a(i,j)*b ]
+c = [ a(i,j)*b ]
 @end example
 
 For example:
--- a/libinterp/corefcn/latex-text-renderer.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/latex-text-renderer.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -128,7 +128,7 @@
       text_renderer::string str ("", fnt, 0.0, 0.0);
       str.set_color (m_color);
 
-      gh_manager& gh_mgr = octave::__get_gh_manager__ ("text_to_strlist");
+      gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
       gh_manager::latex_data ldata = gh_mgr.get_latex_data (key (txt, halign));
 
@@ -323,8 +323,7 @@
                          "latex_renderer:: failed to read png data. %s",
                          ee.message ().c_str ());
 
-        interpreter& interp
-          = __get_interpreter__ ("latex_renderer::read_image");
+        interpreter& interp = __get_interpreter__ ();
 
         interp.recover_from_exception ();
 
@@ -372,7 +371,7 @@
   latex_renderer::render (const std::string& txt, int halign)
   {
     // Render if it was not already done
-    gh_manager& gh_mgr = octave::__get_gh_manager__ ("latex_renderer::render");
+    gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
     gh_manager::latex_data ldata = gh_mgr.get_latex_data (key (txt, halign));
 
--- a/libinterp/corefcn/load-path.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/load-path.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -158,7 +158,7 @@
     // Look in private directory corresponding to current function (if
     // any).
 
-    symbol_scope scope = __get_current_scope__ ("find_private_file");
+    symbol_scope scope = __get_current_scope__ ();
 
     octave_user_code *curr_code = scope ? scope.user_code () : nullptr;
 
@@ -210,12 +210,12 @@
   static void
   rehash_internal (void)
   {
-    load_path& lp = __get_load_path__ ("rehash_internal");
+    load_path& lp = __get_load_path__ ();
 
     lp.update ();
 
     // Signal the GUI allowing updating the load path dialog
-    event_manager& evmgr = __get_event_manager__ ("rehash_internal");
+    event_manager& evmgr = __get_event_manager__ ();
     evmgr.update_path_dialog ();
 
     // FIXME: maybe we should rename this variable since it is being
@@ -1035,7 +1035,8 @@
       source_file (file, "base");
   }
 
-  // FIXME: maybe we should also maintain a map to speed up this method of access.
+  // FIXME: maybe we should also maintain a map to speed up this method of
+  //        access.
 
   load_path::const_dir_info_list_iterator
   load_path::find_dir_info (const std::string& dir_arg) const
@@ -1203,20 +1204,22 @@
   void
   load_path::read_dir_config (const std::string& dir) const
   {
+    // use canonicalized path as key
+    const std::string key = sys::canonicalize_file_name (dir);
+
     // read file with directory configuration
-    std::string conf_file = dir + sys::file_ops::dir_sep_str ()
-                            + ".oct-config";
+    const std::string
+    conf_file = key + sys::file_ops::dir_sep_str () + ".oct-config";
 
     FILE* cfile = sys::fopen (conf_file, "rb");
 
     if (! cfile)
       {
         // reset directory encoding
-        input_system& input_sys
-          = __get_input_system__ ("load_path::read_dir_config");
+        input_system& input_sys = __get_input_system__ ();
 
         std::string enc_val = "delete";
-        input_sys.set_dir_encoding (dir, enc_val);
+        input_sys.set_dir_encoding (key, enc_val);
         return;
       }
 
@@ -1256,16 +1259,14 @@
               continue;
 
             // set encoding for this directory in input system
-            input_system& input_sys
-              = __get_input_system__ ("load_path::read_dir_config");
-            input_sys.set_dir_encoding (dir, enc_val);
+            input_system& input_sys = __get_input_system__ ();
+            input_sys.set_dir_encoding (key, enc_val);
             return;
           }
       }
 
     // reset directory encoding
-    input_system& input_sys
-      = __get_input_system__ ("load_path::read_dir_config");
+    input_system& input_sys = __get_input_system__ ();
 
     std::string enc_val = "delete";
     input_sys.set_dir_encoding (dir, enc_val);
@@ -1447,8 +1448,7 @@
             // Skip updating if we don't know where we are, but don't
             // treat it as an error.
 
-            interpreter& interp
-              = __get_interpreter__ ("load_path::dir_info::update");
+            interpreter& interp = __get_interpreter__ ();
 
             interp.recover_from_exception ();
           }
@@ -1516,8 +1516,7 @@
             // Skip updating if we don't know where we are but don't treat
             // it as an error.
 
-            interpreter& interp
-              = __get_interpreter__ ("load_path::dir_info::initialize");
+            interpreter& interp = __get_interpreter__ ();
 
             interp.recover_from_exception ();
           }
@@ -1799,7 +1798,8 @@
         if (p != fcn_file_map.end ())
           {
             std::string fname
-              = sys::file_ops::concat (sys::file_ops::concat (dir, "private"), fcn);
+              = sys::file_ops::concat (sys::file_ops::concat (dir, "private"),
+                                       fcn);
 
             if (check_file_type (fname, type, p->second, fcn,
                                  "load_path::find_private_fcn"))
@@ -1965,12 +1965,12 @@
               {
                 if (file_info_list.empty ())
                   {
-                    symbol_table& symtab
-                      = __get_symbol_table__ ("load_path::package_info::add_to_fcn_map");
+                    symbol_table& symtab = __get_symbol_table__ ();
 
                     if (symtab.is_built_in_function_name (base))
                       {
-                        std::string fcn_path = sys::file_ops::concat (dir_name, fname);
+                        std::string fcn_path = sys::file_ops::concat (dir_name,
+                                                                      fname);
 
                         warning_with_id ("Octave:shadowed-function",
                                          "function %s shadows a built-in function",
@@ -1992,7 +1992,8 @@
                         && s_sys_path.find (old.dir_name) != std::string::npos
                         && in_path_list (s_sys_path, old.dir_name))
                       {
-                        std::string fcn_path = sys::file_ops::concat (dir_name, fname);
+                        std::string fcn_path = sys::file_ops::concat (dir_name,
+                                                                      fname);
 
                         warning_with_id ("Octave:shadowed-function",
                                          "function %s shadows a core library function",
@@ -2092,7 +2093,8 @@
 
   void
   load_path::package_info::move_fcn_map (const std::string& dir_name,
-                                         const string_vector& fcn_files, bool at_end)
+                                         const string_vector& fcn_files,
+                                         bool at_end)
   {
     octave_idx_type len = fcn_files.numel ();
 
@@ -2446,7 +2448,8 @@
                 sys::file_stat fs (nm);
 
                 if (fs && fs.is_dir ())
-                  retval += directory_path::path_sep_str () + genpath (nm, skip);
+                  retval += (directory_path::path_sep_str ()
+                             + genpath (nm, skip));
               }
           }
       }
@@ -2456,8 +2459,8 @@
 
 DEFUN (genpath, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} genpath (@var{dir})
-@deftypefnx {} {} genpath (@var{dir}, @var{skip}, @dots{})
+@deftypefn  {} {@var{pathstr} =} genpath (@var{dir})
+@deftypefnx {} {@var{pathstr} =} genpath (@var{dir}, @var{skipdir1}, @dots{})
 Return a path constructed from @var{dir} and all its subdirectories.
 
 The path does not include package directories (beginning with @samp{+}),
@@ -2510,8 +2513,9 @@
 
 DEFMETHOD (command_line_path, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} command_line_path ()
-Return the command line path variable.
+@deftypefn {} {@var{pathstr} =} command_line_path ()
+Return the path argument given to Octave at the command line when the
+interpreter was started (@env{--path @var{arg}}).
 
 @seealso{path, addpath, rmpath, genpath, pathdef, savepath, pathsep}
 @end deftypefn */)
@@ -2526,9 +2530,10 @@
 
 DEFMETHOD (restoredefaultpath, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} restoredefaultpath ()
+@deftypefn {} {@var{pathstr} =} restoredefaultpath ()
 Restore Octave's path to its initial state at startup.
 
+The re-initialized path is returned as an output.
 @seealso{path, addpath, rmpath, genpath, pathdef, savepath, pathsep}
 @end deftypefn */)
 {
@@ -2549,7 +2554,7 @@
 
 DEFMETHOD (__pathorig__, interp, , ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {@var{val} =} __pathorig__ ()
+@deftypefn {} {@var{str} =} __pathorig__ ()
 Undocumented internal function.
 @end deftypefn */)
 {
@@ -2618,6 +2623,7 @@
            doc: /* -*- texinfo -*-
 @deftypefn  {} {} addpath (@var{dir1}, @dots{})
 @deftypefnx {} {} addpath (@var{dir1}, @dots{}, @var{option})
+@deftypefnx {} {@var{oldpath} =} addpath (@dots{})
 Add named directories to the function search path.
 
 If @var{option} is @qcode{"-begin"} or 0 (the default), prepend the directory
@@ -2755,7 +2761,8 @@
 
 DEFMETHOD (rmpath, interp, args, nargout,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} rmpath (@var{dir1}, @dots{})
+@deftypefn  {} {} rmpath (@var{dir1}, @dots{})
+@deftypefnx {} {@var{oldpath} =} rmpath (@var{dir1}, @dots{})
 Remove @var{dir1}, @dots{} from the current function search path.
 
 In addition to accepting individual directory arguments, lists of
@@ -2815,7 +2822,7 @@
 DEFMETHOD (__dump_load_path__, interp, , ,
            doc: /* -*- texinfo -*-
 @deftypefn {} {} __dump_load_path__ ()
-Undocumented internal function.
+Pretty print Octave path directories and the files within each directory.
 @end deftypefn */)
 {
   load_path& lp = interp.get_load_path ();
--- a/libinterp/corefcn/load-save.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/load-save.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -855,7 +855,8 @@
                                       OCTAVE_VERSION ", %Y-%m-%d %T UTC";
           std::string comment_string = now.strftime (matlab_format);
 
-          std::size_t len = std::min (comment_string.length (), static_cast<std::size_t> (124));
+          std::size_t len = std::min (comment_string.length (),
+                                      static_cast<std::size_t> (124));
           memset (headertext, ' ', 124);
           memcpy (headertext, comment_string.data (), len);
 
@@ -1915,7 +1916,7 @@
            doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} crash_dumps_octave_core ()
 @deftypefnx {} {@var{old_val} =} crash_dumps_octave_core (@var{new_val})
-@deftypefnx {} {} crash_dumps_octave_core (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} crash_dumps_octave_core (@var{new_val}, "local")
 Query or set the internal variable that controls whether Octave tries
 to save all current variables to the file @file{octave-workspace} if it
 crashes or receives a hangup, terminate or similar signal.
@@ -1936,7 +1937,7 @@
            doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} save_default_options ()
 @deftypefnx {} {@var{old_val} =} save_default_options (@var{new_val})
-@deftypefnx {} {} save_default_options (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} save_default_options (@var{new_val}, "local")
 Query or set the internal variable that specifies the default options
 for the @code{save} command, and defines the default format.
 
@@ -1958,7 +1959,7 @@
            doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} octave_core_file_limit ()
 @deftypefnx {} {@var{old_val} =} octave_core_file_limit (@var{new_val})
-@deftypefnx {} {} octave_core_file_limit (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} octave_core_file_limit (@var{new_val}, "local")
 Query or set the internal variable that specifies the maximum amount of memory
 that Octave will save when writing a crash dump file.
 
@@ -1987,7 +1988,7 @@
            doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} octave_core_file_name ()
 @deftypefnx {} {@var{old_val} =} octave_core_file_name (@var{new_val})
-@deftypefnx {} {} octave_core_file_name (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} octave_core_file_name (@var{new_val}, "local")
 Query or set the internal variable that specifies the name of the file
 used for saving data from the top-level workspace if Octave aborts.
 
@@ -2009,7 +2010,7 @@
            doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} octave_core_file_options ()
 @deftypefnx {} {@var{old_val} =} octave_core_file_options (@var{new_val})
-@deftypefnx {} {} octave_core_file_options (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} octave_core_file_options (@var{new_val}, "local")
 Query or set the internal variable that specifies the options used for
 saving the workspace data if Octave aborts.
 
@@ -2032,7 +2033,7 @@
            doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} save_header_format_string ()
 @deftypefnx {} {@var{old_val} =} save_header_format_string (@var{new_val})
-@deftypefnx {} {} save_header_format_string (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} save_header_format_string (@var{new_val}, "local")
 Query or set the internal variable that specifies the format string used for
 the comment line written at the beginning of text-format data files saved by
 Octave.
@@ -2065,8 +2066,7 @@
 void
 dump_octave_core (void)
 {
-  octave::load_save_system& load_save_sys
-    = octave::__get_load_save_system__ ("dump_octave_core");
+  octave::load_save_system& load_save_sys = octave::__get_load_save_system__ ();
 
   load_save_sys.dump_octave_core ();
 }
--- a/libinterp/corefcn/ls-hdf5.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/ls-hdf5.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -307,17 +307,17 @@
   // HDF5 doesn't print out all sorts of error messages if we
   // call H5Aopen for a non-existing attribute
 
-  H5E_auto_t err_func;
-  void *err_func_data;
+  H5E_auto_t err_fcn;
+  void *err_fcn_data;
 
   // turn off error reporting temporarily, but save the error
   // reporting function:
 
 #if defined (HAVE_HDF5_18)
-  H5Eget_auto (octave_H5E_DEFAULT, &err_func, &err_func_data);
+  H5Eget_auto (octave_H5E_DEFAULT, &err_fcn, &err_fcn_data);
   H5Eset_auto (octave_H5E_DEFAULT, nullptr, nullptr);
 #else
-  H5Eget_auto (&err_func, &err_func_data);
+  H5Eget_auto (&err_fcn, &err_fcn_data);
   H5Eset_auto (nullptr, nullptr);
 #endif
 
@@ -332,9 +332,9 @@
 
   // restore error reporting:
 #if defined (HAVE_HDF5_18)
-  H5Eset_auto (octave_H5E_DEFAULT, err_func, err_func_data);
+  H5Eset_auto (octave_H5E_DEFAULT, err_fcn, err_fcn_data);
 #else
-  H5Eset_auto (err_func, err_func_data);
+  H5Eset_auto (err_fcn, err_fcn_data);
 #endif
   return retval;
 
@@ -355,17 +355,17 @@
   // HDF5 doesn't print out all sorts of error messages if we
   // call H5Aopen for a non-existing attribute
 
-  H5E_auto_t err_func;
-  void *err_func_data;
+  H5E_auto_t err_fcn;
+  void *err_fcn_data;
 
   // turn off error reporting temporarily, but save the error
   // reporting function:
 
 #if defined (HAVE_HDF5_18)
-  H5Eget_auto (octave_H5E_DEFAULT, &err_func, &err_func_data);
+  H5Eget_auto (octave_H5E_DEFAULT, &err_fcn, &err_fcn_data);
   H5Eset_auto (octave_H5E_DEFAULT, nullptr, nullptr);
 #else
-  H5Eget_auto (&err_func, &err_func_data);
+  H5Eget_auto (&err_fcn, &err_fcn_data);
   H5Eset_auto (nullptr, nullptr);
 #endif
 
@@ -384,9 +384,9 @@
 
   // restore error reporting:
 #if defined (HAVE_HDF5_18)
-  H5Eset_auto (octave_H5E_DEFAULT, err_func, err_func_data);
+  H5Eset_auto (octave_H5E_DEFAULT, err_fcn, err_fcn_data);
 #else
-  H5Eset_auto (err_func, err_func_data);
+  H5Eset_auto (err_fcn, err_fcn_data);
 #endif
   return retval;
 
@@ -622,8 +622,7 @@
 
   args(0) = std::string (iftext_tmp);
 
-  octave::interpreter& interp
-    = octave::__get_interpreter__ ("load_inline_fcn");
+  octave::interpreter& interp = octave::__get_interpreter__ ();
 
   octave_value_list tmp = interp.feval ("inline", args, 1);
 
@@ -672,8 +671,7 @@
 
   std::string vname = name;
 
-  octave::type_info& type_info
-    = octave::__get_type_info__ ("hdf5_read_next_data_internal");
+  octave::type_info& type_info = octave::__get_type_info__ ();
 
   // Allow identifiers as all digits so we can load lists saved by
   // earlier versions of Octave.
@@ -1272,7 +1270,8 @@
   if (space_hid < 0) return space_hid;
 #if defined (HAVE_HDF5_18)
   data_hid = H5Dcreate (loc_id, name, H5T_NATIVE_IDX, space_hid,
-                        octave_H5P_DEFAULT, octave_H5P_DEFAULT, octave_H5P_DEFAULT);
+                        octave_H5P_DEFAULT, octave_H5P_DEFAULT,
+                        octave_H5P_DEFAULT);
 #else
   data_hid = H5Dcreate (loc_id, name, H5T_NATIVE_IDX, space_hid,
                         octave_H5P_DEFAULT);
--- a/libinterp/corefcn/ls-hdf5.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/ls-hdf5.h	Mon Aug 29 13:58:00 2022 +0200
@@ -53,7 +53,8 @@
 
   ~hdf5_fstreambase () { close (); }
 
-  OCTINTERP_API hdf5_fstreambase (const char *name, int mode, int /* prot */ = 0);
+  OCTINTERP_API hdf5_fstreambase (const char *name, int mode,
+                                  int /* prot */ = 0);
 
   OCTINTERP_API void close (void);
 
--- a/libinterp/corefcn/ls-mat-ascii.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/ls-mat-ascii.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -356,8 +356,7 @@
     }
   catch (const octave::execution_exception&)
     {
-      octave::interpreter& interp
-        = octave::__get_interpreter__ ("save_mat_ascii_data");
+      octave::interpreter& interp = octave::__get_interpreter__ ();
 
       interp.recover_from_exception ();
 
--- a/libinterp/corefcn/ls-mat5.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/ls-mat5.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -512,8 +512,7 @@
   if (read_mat5_tag (is, swap, type, element_length, is_small_data_element))
     return retval;                      // EOF
 
-  octave::interpreter& interp
-    = octave::__get_interpreter__ ("read_mat5_binary_element");
+  octave::interpreter& interp = octave::__get_interpreter__ ();
 
   if (type == miCOMPRESSED)
     {
@@ -913,7 +912,8 @@
 
                         if (ov_fcn.is_defined ())
                           // XXX FCN_HANDLE: SIMPLE/SCOPED
-                          tc = octave_value (new octave_fcn_handle (ov_fcn, fname));
+                          tc = octave_value (new octave_fcn_handle (ov_fcn,
+                                                                    fname));
                       }
                     else
                       {
@@ -940,7 +940,8 @@
 
                         if (ov_fcn.is_defined ())
                           // XXX FCN_HANDLE: SIMPLE/SCOPED
-                          tc = octave_value (new octave_fcn_handle (ov_fcn, fname));
+                          tc = octave_value (new octave_fcn_handle (ov_fcn,
+                                                                    fname));
                         else
                           {
                             warning_with_id ("Octave:load:file-not-found",
@@ -1041,7 +1042,8 @@
               error ("load: failed to load anonymous function handle");
 
             // XXX FCN_HANDLE: ANONYMOUS
-            tc = octave_value (new octave_fcn_handle (fh->fcn_val (), local_vars));
+            tc = octave_value (new octave_fcn_handle (fh->fcn_val (),
+                                                      local_vars));
           }
         else
           error ("load: invalid function handle type");
@@ -2703,7 +2705,8 @@
     {
       if (tc.is_inline_function () || tc.isobject ())
         {
-          std::string classname = (tc.isobject () ? tc.class_name () : "inline");
+          std::string classname = (tc.isobject () ? tc.class_name ()
+                                                  : "inline");
           std::size_t namelen = classname.length ();
 
           if (namelen > max_namelen)
@@ -2720,8 +2723,7 @@
 
       octave_map m;
 
-      octave::load_path& lp
-        = octave::__get_load_path__ ("save_mat5_binary_element");
+      octave::load_path& lp = octave::__get_load_path__ ();
 
       if (tc.isobject ()
           && lp.find_method (tc.class_name (), "saveobj") != "")
--- a/libinterp/corefcn/ls-oct-binary.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/ls-oct-binary.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -113,8 +113,7 @@
         {
           args(0) = std::string (ctmp2);
 
-          octave::interpreter& interp
-            = octave::__get_interpreter__ ("load_inline_fcn");
+          octave::interpreter& interp = octave::__get_interpreter__ ();
 
           octave_value_list tmp_inl = interp.feval ("inline", args, 1);
 
@@ -247,8 +246,7 @@
   if (! is.read (reinterpret_cast<char *> (&tmp), 1))
     error ("load: trouble reading binary file '%s'", filename.c_str ());
 
-  octave::type_info& type_info
-    = octave::__get_type_info__ ("read_binary_data");
+  octave::type_info& type_info = octave::__get_type_info__ ();
 
   // All cases except 255 kept for backwards compatibility
   switch (tmp)
--- a/libinterp/corefcn/ls-oct-text.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/ls-oct-text.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -270,8 +270,7 @@
         {
           args(0) = std::string (buf);
 
-          octave::interpreter& interp
-            = octave::__get_interpreter__ ("load_inline_fcn");
+          octave::interpreter& interp = octave::__get_interpreter__ ();
 
           octave_value_list tmp = interp.feval ("inline", args, 1);
 
@@ -336,8 +335,7 @@
     }
   else
     {
-      octave::type_info& type_info
-        = octave::__get_type_info__ ("read_text_data");
+      octave::type_info& type_info = octave::__get_type_info__ ();
 
       tc = type_info.lookup_type (typ);
     }
@@ -463,7 +461,7 @@
        doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} save_precision ()
 @deftypefnx {} {@var{old_val} =} save_precision (@var{new_val})
-@deftypefnx {} {} save_precision (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} save_precision (@var{new_val}, "local")
 Query or set the internal variable that specifies the number of digits to
 keep when saving data in text format.
 
--- a/libinterp/corefcn/lsode.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/lsode.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -379,12 +379,12 @@
 
   double tzero = out_times (0);
 
-  ODEFunc func (lsode_user_function);
+  ODEFunc fcn (lsode_user_function);
 
   if (lsode_jac.is_defined ())
-    func.set_jacobian_function (lsode_user_jacobian);
+    fcn.set_jacobian_function (lsode_user_jacobian);
 
-  LSODE ode (state, tzero, func);
+  LSODE ode (state, tzero, fcn);
 
   ode.set_options (lsode_opts);
 
--- a/libinterp/corefcn/lu.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/lu.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -781,14 +781,16 @@
 %! [L,U] = luupdate (L,U,P*single (u), single (v));
 %! assert (norm (vec (tril (L)-L), Inf) == 0);
 %! assert (norm (vec (triu (U)-U), Inf) == 0);
-%! assert (norm (vec (P'*L*U - single (A) - single (u)*single (v).'), Inf) < norm (single (A))*1e1*eps ("single"));
+%! assert (norm (vec (P'*L*U - single (A) - single (u)*single (v).'), Inf)
+%!         < norm (single (A))*1e1*eps ("single"));
 %!
 %!testif HAVE_QRUPDATE_LUU
 %! [L,U,P] = lu (single (Ac));
 %! [L,U] = luupdate (L,U,P*single (uc),single (vc));
 %! assert (norm (vec (tril (L)-L), Inf) == 0);
 %! assert (norm (vec (triu (U)-U), Inf) == 0);
-%! assert (norm (vec (P'*L*U - single (Ac) - single (uc)*single (vc).'), Inf) < norm (single (Ac))*1e1*eps ("single"));
+%! assert (norm (vec (P'*L*U - single (Ac) - single (uc)*single (vc).'), Inf)
+%!         < norm (single (Ac))*1e1*eps ("single"));
 
 %!testif HAVE_QRUPDATE_LUU
 %! [L,U,P] = lu (A);
@@ -823,14 +825,16 @@
 %! [L,U,P] = luupdate (L,U,P,single (u),single (v));
 %! assert (norm (vec (tril (L)-L), Inf) == 0);
 %! assert (norm (vec (triu (U)-U), Inf) == 0);
-%! assert (norm (vec (P'*L*U - single (A) - single (u)*single (v).'), Inf) < norm (single (A))*1e1*eps ("single"));
+%! assert (norm (vec (P'*L*U - single (A) - single (u)*single (v).'), Inf)
+%!         < norm (single (A))*1e1*eps ("single"));
 %!
 %!testif HAVE_QRUPDATE_LUU
 %! [L,U,P] = lu (single (Ac));
 %! [L,U,P] = luupdate (L,U,P,single (uc),single (vc));
 %! assert (norm (vec (tril (L)-L), Inf) == 0);
 %! assert (norm (vec (triu (U)-U), Inf) == 0);
-%! assert (norm (vec (P'*L*U - single (Ac) - single (uc)*single (vc).'), Inf) < norm (single (Ac))*1e1*eps ("single"));
+%! assert (norm (vec (P'*L*U - single (Ac) - single (uc)*single (vc).'), Inf)
+%!         < norm (single (Ac))*1e1*eps ("single"));
 */
 
 OCTAVE_NAMESPACE_END
--- a/libinterp/corefcn/mappers.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/mappers.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -41,8 +41,8 @@
 
 DEFUN (abs, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} abs (@var{z})
-Compute the magnitude of @var{z}.
+@deftypefn {} {@var{z} =} abs (@var{x})
+Compute the magnitude of @var{x}.
 
 The magnitude is defined as
 @tex
@@ -88,7 +88,7 @@
 
 DEFUN (acos, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} acos (@var{x})
+@deftypefn {} {@var{y} =} acos (@var{x})
 Compute the inverse cosine in radians for each element of @var{x}.
 @seealso{cos, acosd}
 @end deftypefn */)
@@ -148,7 +148,7 @@
 
 DEFUN (acosh, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} acosh (@var{x})
+@deftypefn {} {@var{y} =} acosh (@var{x})
 Compute the inverse hyperbolic cosine for each element of @var{x}.
 @seealso{cosh}
 @end deftypefn */)
@@ -220,7 +220,7 @@
 
 DEFUN (angle, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} angle (@var{z})
+@deftypefn {} {@var{theta} =} angle (@var{z})
 @xref{XREFarg,,@code{arg}}.
 @seealso{arg}
 @end deftypefn */)
@@ -233,8 +233,8 @@
 
 DEFUN (arg, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} arg (@var{z})
-@deftypefnx {} {} angle (@var{z})
+@deftypefn  {} {@var{theta} =} arg (@var{z})
+@deftypefnx {} {@var{theta} =} angle (@var{z})
 Compute the argument, i.e., angle of @var{z}.
 
 This is defined as,
@@ -280,7 +280,8 @@
 %!   assert (arg (single (-1)), single (pi));
 %! endif
 %!assert (arg (single (-i)), single (-pi/2))
-%!assert (arg (single ([1, i; -1, -i])), single ([0, pi/2; pi, -pi/2]), 2e1*eps ("single"))
+%!assert (arg (single ([1, i; -1, -i])),
+%!        single ([0, pi/2; pi, -pi/2]), 2e1*eps ("single"))
 
 %!error arg ()
 %!error arg (1, 2)
@@ -288,7 +289,7 @@
 
 DEFUN (asin, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} asin (@var{x})
+@deftypefn {} {@var{y} =} asin (@var{x})
 Compute the inverse sine in radians for each element of @var{x}.
 @seealso{sin, asind}
 @end deftypefn */)
@@ -353,7 +354,7 @@
 
 DEFUN (asinh, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} asinh (@var{x})
+@deftypefn {} {@var{y} =} asinh (@var{x})
 Compute the inverse hyperbolic sine for each element of @var{x}.
 @seealso{sinh}
 @end deftypefn */)
@@ -395,7 +396,7 @@
 
 DEFUN (atan, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} atan (@var{x})
+@deftypefn {} {@var{y} =} atan (@var{x})
 Compute the inverse tangent in radians for each element of @var{x}.
 @seealso{tan, atand}
 @end deftypefn */)
@@ -434,7 +435,7 @@
 
 DEFUN (atanh, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} atanh (@var{x})
+@deftypefn {} {@var{y} =} atanh (@var{x})
 Compute the inverse hyperbolic tangent for each element of @var{x}.
 @seealso{tanh}
 @end deftypefn */)
@@ -469,7 +470,7 @@
 
 DEFUN (cbrt, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} cbrt (@var{x})
+@deftypefn {} {@var{y} =} cbrt (@var{x})
 Compute the real-valued cube root of each element of @var{x}.
 
 Unlike @code{@var{x}^(1/3)}, the result will be negative if @var{x} is
@@ -501,7 +502,7 @@
 
 DEFUN (ceil, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} ceil (@var{x})
+@deftypefn {} {@var{y} =} ceil (@var{x})
 Return the smallest integer not less than @var{x}.
 
 This is equivalent to rounding towards positive infinity.
@@ -535,7 +536,8 @@
 %!assert (ceil (single ([2, 1.1, -1.1, -1])), single ([2, 2, -1, -1]))
 
 ## complex single precision
-%!assert (ceil (single ([2+2i, 1.1+1.1i, -1.1-1.1i, -1-i])), single ([2+2i, 2+2i, -1-i, -1-i]))
+%!assert (ceil (single ([2+2i, 1.1+1.1i, -1.1-1.1i, -1-i])),
+%!        single ([2+2i, 2+2i, -1-i, -1-i]))
 
 %!error ceil ()
 %!error ceil (1, 2)
@@ -543,7 +545,7 @@
 
 DEFUN (conj, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} conj (@var{z})
+@deftypefn {} {@var{zc} =} conj (@var{z})
 Return the complex conjugate of @var{z}.
 
 The complex conjugate is defined as
@@ -581,7 +583,7 @@
 
 DEFUN (cos, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} cos (@var{x})
+@deftypefn {} {@var{y} =} cos (@var{x})
 Compute the cosine for each element of @var{x} in radians.
 @seealso{acos, cosd, cosh}
 @end deftypefn */)
@@ -615,7 +617,7 @@
 
 DEFUN (cosh, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} cosh (@var{x})
+@deftypefn {} {@var{y} =} cosh (@var{x})
 Compute the hyperbolic cosine for each element of @var{x}.
 @seealso{acosh, sinh, tanh}
 @end deftypefn */)
@@ -643,7 +645,7 @@
 
 DEFUN (erf, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} erf (@var{z})
+@deftypefn {} {@var{v} =} erf (@var{z})
 Compute the error function.
 
 The error function is defined as
@@ -712,7 +714,7 @@
 
 DEFUN (erfinv, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} erfinv (@var{x})
+@deftypefn {} {@var{y} =} erfinv (@var{x})
 Compute the inverse error function.
 
 The inverse error function is defined such that
@@ -732,13 +734,18 @@
 /*
 ## middle region
 %!assert (erf (erfinv ([-0.9 -0.3 0 0.4 0.8])), [-0.9 -0.3 0 0.4 0.8], eps)
-%!assert (erf (erfinv (single ([-0.9 -0.3 0 0.4 0.8]))), single ([-0.9 -0.3 0 0.4 0.8]), eps ("single"))
+%!assert (erf (erfinv (single ([-0.9 -0.3 0 0.4 0.8]))),
+%!        single ([-0.9 -0.3 0 0.4 0.8]), eps ("single"))
 ## tail region
-%!assert (erf (erfinv ([-0.999 -0.99 0.9999 0.99999])), [-0.999 -0.99 0.9999 0.99999], eps)
-%!assert (erf (erfinv (single ([-0.999 -0.99 0.9999 0.99999]))), single ([-0.999 -0.99 0.9999 0.99999]), eps ("single"))
+%!assert (erf (erfinv ([-0.999 -0.99 0.9999 0.99999])),
+%!        [-0.999 -0.99 0.9999 0.99999], eps)
+%!assert (erf (erfinv (single ([-0.999 -0.99 0.9999 0.99999]))),
+%!        single ([-0.999 -0.99 0.9999 0.99999]), eps ("single"))
 ## backward - loss of accuracy
-%!assert (erfinv (erf ([-3 -1 -0.4 0.7 1.3 2.8])), [-3 -1 -0.4 0.7 1.3 2.8], -1e-12)
-%!assert (erfinv (erf (single ([-3 -1 -0.4 0.7 1.3 2.8]))), single ([-3 -1 -0.4 0.7 1.3 2.8]), -1e-4)
+%!assert (erfinv (erf ([-3 -1 -0.4 0.7 1.3 2.8])),
+%!        [-3 -1 -0.4 0.7 1.3 2.8], -1e-12)
+%!assert (erfinv (erf (single ([-3 -1 -0.4 0.7 1.3 2.8]))),
+%!        single ([-3 -1 -0.4 0.7 1.3 2.8]), -1e-4)
 ## exceptional
 %!assert (erfinv ([-1, 1, 1.1, -2.1]), [-Inf, Inf, NaN, NaN])
 %!error erfinv (1+2i)
@@ -749,7 +756,7 @@
 
 DEFUN (erfcinv, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} erfcinv (@var{x})
+@deftypefn {} {@var{y} =} erfcinv (@var{x})
 Compute the inverse complementary error function.
 
 The inverse complementary error function is defined such that
@@ -769,13 +776,18 @@
 /*
 ## middle region
 %!assert (erfc (erfcinv ([1.9 1.3 1 0.6 0.2])), [1.9 1.3 1 0.6 0.2], eps)
-%!assert (erfc (erfcinv (single ([1.9 1.3 1 0.6 0.2]))), single ([1.9 1.3 1 0.6 0.2]), eps ("single"))
+%!assert (erfc (erfcinv (single ([1.9 1.3 1 0.6 0.2]))),
+%!        single ([1.9 1.3 1 0.6 0.2]), eps ("single"))
 ## tail region
-%!assert (erfc (erfcinv ([0.001 0.01 1.9999 1.99999])), [0.001 0.01 1.9999 1.99999], eps)
-%!assert (erfc (erfcinv (single ([0.001 0.01 1.9999 1.99999]))), single ([0.001 0.01 1.9999 1.99999]), eps ("single"))
+%!assert (erfc (erfcinv ([0.001 0.01 1.9999 1.99999])),
+%!        [0.001 0.01 1.9999 1.99999], eps)
+%!assert (erfc (erfcinv (single ([0.001 0.01 1.9999 1.99999]))),
+%!        single ([0.001 0.01 1.9999 1.99999]), eps ("single"))
 ## backward - loss of accuracy
-%!assert (erfcinv (erfc ([-3 -1 -0.4 0.7 1.3 2.8])), [-3 -1 -0.4 0.7 1.3 2.8], -1e-12)
-%!assert (erfcinv (erfc (single ([-3 -1 -0.4 0.7 1.3 2.8]))), single ([-3 -1 -0.4 0.7 1.3 2.8]), -1e-4)
+%!assert (erfcinv (erfc ([-3 -1 -0.4 0.7 1.3 2.8])),
+%!        [-3 -1 -0.4 0.7 1.3 2.8], -1e-12)
+%!assert (erfcinv (erfc (single ([-3 -1 -0.4 0.7 1.3 2.8]))),
+%!        single ([-3 -1 -0.4 0.7 1.3 2.8]), -1e-4)
 ## exceptional
 %!assert (erfcinv ([2, 0, -0.1, 2.1]), [-Inf, Inf, NaN, NaN])
 %!error erfcinv (1+2i)
@@ -786,7 +798,7 @@
 
 DEFUN (erfc, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} erfc (@var{z})
+@deftypefn {} {@var{v} =} erfc (@var{z})
 Compute the complementary error function.
 
 The complementary error function is defined as
@@ -816,7 +828,7 @@
 
 DEFUN (erfcx, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} erfcx (@var{z})
+@deftypefn {} {@var{v} =} erfcx (@var{z})
 Compute the scaled complementary error function.
 
 The scaled complementary error function is defined as
@@ -858,7 +870,7 @@
 
 DEFUN (erfi, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} erfi (@var{z})
+@deftypefn {} {@var{v} =} erfi (@var{z})
 Compute the imaginary error function.
 
 The imaginary error function is defined as
@@ -895,7 +907,7 @@
 
 DEFUN (dawson, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} dawson (@var{z})
+@deftypefn {} {@var{v} =} dawson (@var{z})
 Compute the Dawson (scaled imaginary error) function.
 
 The Dawson function is defined as
@@ -934,7 +946,7 @@
 
 DEFUN (exp, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} exp (@var{x})
+@deftypefn {} {@var{y} =} exp (@var{x})
 Compute
 @tex
 $e^{x}$
@@ -957,8 +969,10 @@
 /*
 %!assert (exp ([0, 1, -1, -1000]), [1, e, 1/e, 0], sqrt (eps))
 %!assert (exp (1+i), e * (cos (1) + sin (1) * i), sqrt (eps))
-%!assert (exp (single ([0, 1, -1, -1000])), single ([1, e, 1/e, 0]), sqrt (eps ("single")))
-%!assert (exp (single (1+i)), single (e * (cos (1) + sin (1) * i)), sqrt (eps ("single")))
+%!assert (exp (single ([0, 1, -1, -1000])),
+%!        single ([1, e, 1/e, 0]), sqrt (eps ("single")))
+%!assert (exp (single (1+i)),
+%!        single (e * (cos (1) + sin (1) * i)), sqrt (eps ("single")))
 
 %!assert (exp ([Inf, -Inf, NaN]), [Inf 0 NaN])
 %!assert (exp (single ([Inf, -Inf, NaN])), single ([Inf 0 NaN]))
@@ -969,7 +983,7 @@
 
 DEFUN (expm1, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} expm1 (@var{x})
+@deftypefn {} {@var{y} =} expm1 (@var{x})
 Compute
 @tex
 $ e^{x} - 1 $
@@ -999,7 +1013,7 @@
 
 DEFUN (isfinite, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} isfinite (@var{x})
+@deftypefn {} {@var{tf} =} isfinite (@var{x})
 Return a logical array which is true where the elements of @var{x} are
 finite values and false where they are not.
 
@@ -1036,7 +1050,7 @@
 
 DEFUN (fix, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} fix (@var{x})
+@deftypefn {} {@var{y} =} fix (@var{x})
 Truncate fractional portion of @var{x} and return the integer portion.
 
 This is equivalent to rounding towards zero.  If @var{x} is complex, return
@@ -1061,7 +1075,8 @@
 %!assert (fix ([1.1, 1, -1.1, -1]), [1, 1, -1, -1])
 %!assert (fix ([1.1+1.1i, 1+i, -1.1-1.1i, -1-i]), [1+i, 1+i, -1-i, -1-i])
 %!assert (fix (single ([1.1, 1, -1.1, -1])), single ([1, 1, -1, -1]))
-%!assert (fix (single ([1.1+1.1i, 1+i, -1.1-1.1i, -1-i])), single ([1+i, 1+i, -1-i, -1-i]))
+%!assert (fix (single ([1.1+1.1i, 1+i, -1.1-1.1i, -1-i])),
+%!        single ([1+i, 1+i, -1-i, -1-i]))
 
 %!error fix ()
 %!error fix (1, 2)
@@ -1069,7 +1084,7 @@
 
 DEFUN (floor, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} floor (@var{x})
+@deftypefn {} {@var{y} =} floor (@var{x})
 Return the largest integer not greater than @var{x}.
 
 This is equivalent to rounding towards negative infinity.  If @var{x} is
@@ -1094,7 +1109,8 @@
 %!assert (floor ([2, 1.1, -1.1, -1]), [2, 1, -2, -1])
 %!assert (floor ([2+2i, 1.1+1.1i, -1.1-1.1i, -1-i]), [2+2i, 1+i, -2-2i, -1-i])
 %!assert (floor (single ([2, 1.1, -1.1, -1])), single ([2, 1, -2, -1]))
-%!assert (floor (single ([2+2i, 1.1+1.1i, -1.1-1.1i, -1-i])), single ([2+2i, 1+i, -2-2i, -1-i]))
+%!assert (floor (single ([2+2i, 1.1+1.1i, -1.1-1.1i, -1-i])),
+%!        single ([2+2i, 1+i, -2-2i, -1-i]))
 
 %!error floor ()
 %!error floor (1, 2)
@@ -1102,7 +1118,7 @@
 
 DEFUN (gamma, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} gamma (@var{z})
+@deftypefn {} {@var{v} =} gamma (@var{z})
 Compute the Gamma function.
 
 The Gamma function is defined as
@@ -1171,7 +1187,7 @@
 
 DEFUN (imag, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} imag (@var{z})
+@deftypefn {} {@var{y} =} imag (@var{z})
 Return the imaginary part of @var{z} as a real number.
 @seealso{real, conj}
 @end deftypefn */)
@@ -1199,7 +1215,7 @@
 
 DEFUNX ("isalnum", Fisalnum, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} isalnum (@var{s})
+@deftypefn {} {@var{tf} =} isalnum (@var{s})
 Return a logical array which is true where the elements of @var{s} are
 letters or digits and false where they are not.
 
@@ -1229,7 +1245,7 @@
 
 DEFUNX ("isalpha", Fisalpha, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} isalpha (@var{s})
+@deftypefn {} {@var{tf} =} isalpha (@var{s})
 Return a logical array which is true where the elements of @var{s} are
 letters and false where they are not.
 
@@ -1258,7 +1274,7 @@
 
 DEFUNX ("isascii", Fisascii, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} isascii (@var{s})
+@deftypefn {} {@var{tf} =} isascii (@var{s})
 Return a logical array which is true where the elements of @var{s} are
 ASCII characters (in the range 0 to 127 decimal) and false where they are
 not.
@@ -1282,7 +1298,7 @@
 
 DEFUNX ("iscntrl", Fiscntrl, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} iscntrl (@var{s})
+@deftypefn {} {@var{tf} =} iscntrl (@var{s})
 Return a logical array which is true where the elements of @var{s} are
 control characters and false where they are not.
 @seealso{ispunct, isspace, isalpha, isdigit}
@@ -1308,7 +1324,7 @@
 
 DEFUNX ("isdigit", Fisdigit, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} isdigit (@var{s})
+@deftypefn {} {@var{tf} =} isdigit (@var{s})
 Return a logical array which is true where the elements of @var{s} are
 decimal digits (0-9) and false where they are not.
 @seealso{isxdigit, isalpha, isletter, ispunct, isspace, iscntrl}
@@ -1334,7 +1350,7 @@
 
 DEFUN (isinf, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} isinf (@var{x})
+@deftypefn {} {@var{tf} =} isinf (@var{x})
 Return a logical array which is true where the elements of @var{x} are
 infinite and false where they are not.
 
@@ -1360,13 +1376,15 @@
 %!assert (! isinf (NaN))
 %!assert (! isinf (NA))
 %!assert (isinf (rand (1,10)), false (1,10))
-%!assert (isinf ([NaN -Inf -1 0 1 Inf NA]), [false, true, false, false, false, true, false])
+%!assert (isinf ([NaN -Inf -1 0 1 Inf NA]),
+%!        [false, true, false, false, false, true, false])
 
 %!assert (isinf (single (Inf)))
 %!assert (! isinf (single (NaN)))
 %!assert (! isinf (single (NA)))
 %!assert (isinf (single (rand (1,10))), false (1,10))
-%!assert (isinf (single ([NaN -Inf -1 0 1 Inf NA])), [false, true, false, false, false, true, false])
+%!assert (isinf (single ([NaN -Inf -1 0 1 Inf NA])),
+%!        [false, true, false, false, false, true, false])
 %!assert (! isinf ('a'))
 
 %!error isinf ()
@@ -1375,7 +1393,7 @@
 
 DEFUNX ("isgraph", Fisgraph, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} isgraph (@var{s})
+@deftypefn {} {@var{tf} =} isgraph (@var{s})
 Return a logical array which is true where the elements of @var{s} are
 printable characters (but not the space character) and false where they are
 not.
@@ -1402,7 +1420,7 @@
 
 DEFUNX ("islower", Fislower, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} islower (@var{s})
+@deftypefn {} {@var{tf} =} islower (@var{s})
 Return a logical array which is true where the elements of @var{s} are
 lowercase letters and false where they are not.
 @seealso{isupper, isalpha, isletter, isalnum}
@@ -1428,7 +1446,7 @@
 
 DEFUN (isna, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} isna (@var{x})
+@deftypefn {} {@var{tf} =} isna (@var{x})
 Return a logical array which is true where the elements of @var{x} are
 NA (missing) values and false where they are not.
 
@@ -1454,13 +1472,15 @@
 %!assert (! isna (NaN))
 %!assert (isna (NA))
 %!assert (isna (rand (1,10)), false (1,10))
-%!assert (isna ([NaN -Inf -1 0 1 Inf NA]), [false, false, false, false, false, false, true])
+%!assert (isna ([NaN -Inf -1 0 1 Inf NA]),
+%!        [false, false, false, false, false, false, true])
 
 %!assert (! isna (single (Inf)))
 %!assert (! isna (single (NaN)))
 %!assert (isna (single (NA)))
 %!assert (isna (single (rand (1,10))), false (1,10))
-%!assert (isna (single ([NaN -Inf -1 0 1 Inf NA])), [false, false, false, false, false, false, true])
+%!assert (isna (single ([NaN -Inf -1 0 1 Inf NA])),
+%!        [false, false, false, false, false, false, true])
 
 %!error isna ()
 %!error isna (1, 2)
@@ -1468,7 +1488,7 @@
 
 DEFUN (isnan, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} isnan (@var{x})
+@deftypefn {} {@var{tf} =} isnan (@var{x})
 Return a logical array which is true where the elements of @var{x} are
 NaN values and false where they are not.
 
@@ -1494,13 +1514,15 @@
 %!assert (isnan (NaN))
 %!assert (isnan (NA))
 %!assert (isnan (rand (1,10)), false (1,10))
-%!assert (isnan ([NaN -Inf -1 0 1 Inf NA]), [true, false, false, false, false, false, true])
+%!assert (isnan ([NaN -Inf -1 0 1 Inf NA]),
+%!        [true, false, false, false, false, false, true])
 
 %!assert (! isnan (single (Inf)))
 %!assert (isnan (single (NaN)))
 %!assert (isnan (single (NA)))
 %!assert (isnan (single (rand (1,10))), false (1,10))
-%!assert (isnan (single ([NaN -Inf -1 0 1 Inf NA])), [true, false, false, false, false, false, true])
+%!assert (isnan (single ([NaN -Inf -1 0 1 Inf NA])),
+%!        [true, false, false, false, false, false, true])
 %!assert (! isnan ('a'))
 
 %!error isnan ()
@@ -1509,7 +1531,7 @@
 
 DEFUNX ("isprint", Fisprint, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} isprint (@var{s})
+@deftypefn {} {@var{tf} =} isprint (@var{s})
 Return a logical array which is true where the elements of @var{s} are
 printable characters (including the space character) and false where they
 are not.
@@ -1536,7 +1558,7 @@
 
 DEFUNX ("ispunct", Fispunct, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} ispunct (@var{s})
+@deftypefn {} {@var{tf} =} ispunct (@var{s})
 Return a logical array which is true where the elements of @var{s} are
 punctuation characters and false where they are not.
 @seealso{isalpha, isdigit, isspace, iscntrl}
@@ -1565,7 +1587,7 @@
 
 DEFUNX ("isspace", Fisspace, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} isspace (@var{s})
+@deftypefn {} {@var{tf} =} isspace (@var{s})
 Return a logical array which is true where the elements of @var{s} are
 whitespace characters (space, formfeed, newline, carriage return, tab, and
 vertical tab) and false where they are not.
@@ -1592,7 +1614,7 @@
 
 DEFUNX ("isupper", Fisupper, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} isupper (@var{s})
+@deftypefn {} {@var{tf} =} isupper (@var{s})
 Return a logical array which is true where the elements of @var{s} are
 uppercase letters and false where they are not.
 @seealso{islower, isalpha, isletter, isalnum}
@@ -1618,7 +1640,7 @@
 
 DEFUNX ("isxdigit", Fisxdigit, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} isxdigit (@var{s})
+@deftypefn {} {@var{tf} =} isxdigit (@var{s})
 Return a logical array which is true where the elements of @var{s} are
 hexadecimal digits (0-9 and @nospell{a-fA-F}).
 @seealso{isdigit}
@@ -1646,9 +1668,12 @@
 
 DEFUN (lgamma, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} gammaln (@var{x})
-@deftypefnx {} {} lgamma (@var{x})
+@deftypefn  {} {@var{y} =} gammaln (@var{x})
+@deftypefnx {} {@var{y} =} lgamma (@var{x})
 Return the natural logarithm of the gamma function of @var{x}.
+
+Programming Note: @code{lgamma} is an alias for @code{gammaln} and either name
+can be used in Octave.
 @seealso{gamma, gammainc}
 @end deftypefn */)
 {
@@ -1689,7 +1714,7 @@
 
 DEFUN (log, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} log (@var{x})
+@deftypefn {} {@var{y} =} log (@var{x})
 Compute the natural logarithm,
 @tex
 $\ln{(x)},$
@@ -1714,7 +1739,8 @@
 %!assert (log ([-0.5, -1.5, -2.5]), log ([0.5, 1.5, 2.5]) + pi*1i, sqrt (eps))
 
 %!assert (log (single ([1, e, e^2])), single ([0, 1, 2]), sqrt (eps ("single")))
-%!assert (log (single ([-0.5, -1.5, -2.5])), single (log ([0.5, 1.5, 2.5]) + pi*1i), 4*eps ("single"))
+%!assert (log (single ([-0.5, -1.5, -2.5])),
+%!        single (log ([0.5, 1.5, 2.5]) + pi*1i), 4*eps ("single"))
 
 %!error log ()
 %!error log (1, 2)
@@ -1722,7 +1748,7 @@
 
 DEFUN (log10, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} log10 (@var{x})
+@deftypefn {} {@var{y} =} log10 (@var{x})
 Compute the base-10 logarithm of each element of @var{x}.
 @seealso{log, log2, logspace, exp}
 @end deftypefn */)
@@ -1735,7 +1761,8 @@
 
 /*
 %!assert (log10 ([0.01, 0.1, 1, 10, 100]), [-2, -1, 0, 1, 2], sqrt (eps))
-%!assert (log10 (single ([0.01, 0.1, 1, 10, 100])), single ([-2, -1, 0, 1, 2]), sqrt (eps ("single")))
+%!assert (log10 (single ([0.01, 0.1, 1, 10, 100])),
+%!        single ([-2, -1, 0, 1, 2]), sqrt (eps ("single")))
 
 %!error log10 ()
 %!error log10 (1, 2)
@@ -1743,7 +1770,7 @@
 
 DEFUN (log1p, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} log1p (@var{x})
+@deftypefn {} {@var{y} =} log1p (@var{x})
 Compute
 @tex
 $\ln{(1 + x)}$
@@ -1778,7 +1805,7 @@
 
 DEFUN (real, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} real (@var{z})
+@deftypefn {} {@var{x} =} real (@var{z})
 Return the real part of @var{z}.
 @seealso{imag, conj}
 @end deftypefn */)
@@ -1806,7 +1833,7 @@
 
 DEFUN (round, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} round (@var{x})
+@deftypefn {} {@var{y} =} round (@var{x})
 Return the integer nearest to @var{x}.
 
 If @var{x} is complex, return
@@ -1851,7 +1878,7 @@
 
 DEFUN (roundb, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} roundb (@var{x})
+@deftypefn {} {@var{y} =} roundb (@var{x})
 Return the integer nearest to @var{x}.  If there are two nearest
 integers, return the even one (banker's rounding).
 
@@ -1891,7 +1918,7 @@
 
 DEFUN (sign, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} sign (@var{x})
+@deftypefn {} {@var{y} =} sign (@var{x})
 Compute the @dfn{signum} function.
 
 This is defined as
@@ -1943,7 +1970,7 @@
 
 DEFUNX ("signbit", Fsignbit, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} signbit (@var{x})
+@deftypefn {} {@var{y} =} signbit (@var{x})
 Return logical true if the value of @var{x} has its sign bit set and false
 otherwise.
 
@@ -1982,7 +2009,7 @@
 
 DEFUN (sin, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} sin (@var{x})
+@deftypefn {} {@var{y} =} sin (@var{x})
 Compute the sine for each element of @var{x} in radians.
 @seealso{asin, sind, sinh}
 @end deftypefn */)
@@ -2014,7 +2041,7 @@
 
 DEFUN (sinh, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} sinh (@var{x})
+@deftypefn {} {@var{y} =} sinh (@var{x})
 Compute the hyperbolic sine for each element of @var{x}.
 @seealso{asinh, cosh, tanh}
 @end deftypefn */)
@@ -2042,7 +2069,7 @@
 
 DEFUN (sqrt, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} sqrt (@var{x})
+@deftypefn {} {@var{y} =} sqrt (@var{x})
 Compute the square root of each element of @var{x}.
 
 If @var{x} is negative, a complex result is returned.
@@ -2061,12 +2088,16 @@
 %!assert (sqrt (4), 2)
 %!assert (sqrt (-1), i)
 %!assert (sqrt (1+i), exp (0.5 * log (1+i)), sqrt (eps))
-%!assert (sqrt ([4, -4; i, 1-i]), [2, 2i; exp(0.5 * log (i)), exp(0.5 * log (1-i))], sqrt (eps))
+%!assert (sqrt ([4, -4; i, 1-i]),
+%!        [2, 2i; exp(0.5 * log (i)), exp(0.5 * log (1-i))], sqrt (eps))
 
 %!assert (sqrt (single (4)), single (2))
 %!assert (sqrt (single (-1)), single (i))
-%!assert (sqrt (single (1+i)), single (exp (0.5 * log (1+i))), sqrt (eps ("single")))
-%!assert (sqrt (single ([4, -4; i, 1-i])), single ([2, 2i; exp(0.5 * log (i)), exp(0.5 * log (1-i))]), sqrt (eps ("single")))
+%!assert (sqrt (single (1+i)),
+%!        single (exp (0.5 * log (1+i))), sqrt (eps ("single")))
+%!assert (sqrt (single ([4, -4; i, 1-i])),
+%!        single ([2, 2i; exp(0.5 * log (i)), exp(0.5 * log (1-i))]),
+%!        sqrt (eps ("single")))
 
 %!error sqrt ()
 %!error sqrt (1, 2)
@@ -2074,7 +2105,7 @@
 
 DEFUN (tan, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} tan (@var{z})
+@deftypefn {} {@var{y} =} tan (@var{z})
 Compute the tangent for each element of @var{x} in radians.
 @seealso{atan, tand, tanh}
 @end deftypefn */)
@@ -2106,7 +2137,7 @@
 
 DEFUN (tanh, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} tanh (@var{x})
+@deftypefn {} {@var{y} =} tanh (@var{x})
 Compute hyperbolic tangent for each element of @var{x}.
 @seealso{atanh, sinh, cosh}
 @end deftypefn */)
@@ -2134,8 +2165,8 @@
 
 DEFUNX ("tolower", Ftolower, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn  {} {} tolower (@var{s})
-@deftypefnx {} {} lower (@var{s})
+@deftypefn  {} {@var{y} =} tolower (@var{s})
+@deftypefnx {} {@var{y} =} lower (@var{s})
 Return a copy of the string or cell string @var{s}, with each uppercase
 character replaced by the corresponding lowercase one; non-alphabetic
 characters are left unchanged.
@@ -2148,6 +2179,10 @@
       @result{} "mixed case 123"
 @end group
 @end example
+
+Programming Note: @code{lower} is an alias for @code{tolower} and either name
+can be used in Octave.
+
 @seealso{toupper}
 @end deftypefn */)
 {
@@ -2162,10 +2197,12 @@
 /*
 %!assert (tolower ("OCTAVE"), "octave")
 %!assert (tolower ("123OCTave! _&"), "123octave! _&")
-%!assert (tolower ({"ABC", "DEF", {"GHI", {"JKL"}}}), {"abc", "def", {"ghi", {"jkl"}}})
+%!assert (tolower ({"ABC", "DEF", {"GHI", {"JKL"}}}),
+%!        {"abc", "def", {"ghi", {"jkl"}}})
 %!assert (tolower (["ABC"; "DEF"]), ["abc"; "def"])
 %!assert (tolower ({["ABC"; "DEF"]}), {["abc";"def"]})
-%!assert (tolower (["ABCÄÖÜSS"; "abcäöüß"]), ["abcäöüss"; "abcäöüß"])
+%!assert (tolower (["ABCÄÖÜSS"; "abcäöüß"]),
+%!        ["abcäöüss"; "abcäöüß"])
 %!assert (tolower (repmat ("ÄÖÜ", 2, 1, 3)), repmat ("äöü", 2, 1, 3))
 %!assert (tolower (68), 68)
 %!assert (tolower ({[68, 68; 68, 68]}), {[68, 68; 68, 68]})
@@ -2200,8 +2237,8 @@
 
 DEFUNX ("toupper", Ftoupper, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn  {} {} toupper (@var{s})
-@deftypefnx {} {} upper (@var{s})
+@deftypefn  {} {@var{y} =} toupper (@var{s})
+@deftypefnx {} {@var{y} =} upper (@var{s})
 Return a copy of the string or cell string @var{s}, with each lowercase
 character replaced by the corresponding uppercase one; non-alphabetic
 characters are left unchanged.
@@ -2214,6 +2251,10 @@
       @result{} "MIXED CASE 123"
 @end group
 @end example
+
+Programming Note: @code{upper} is an alias for @code{toupper} and either name
+can be used in Octave.
+
 @seealso{tolower}
 @end deftypefn */)
 {
@@ -2228,10 +2269,12 @@
 /*
 %!assert (toupper ("octave"), "OCTAVE")
 %!assert (toupper ("123OCTave! _&"), "123OCTAVE! _&")
-%!assert (toupper ({"abc", "def", {"ghi", {"jkl"}}}), {"ABC", "DEF", {"GHI", {"JKL"}}})
+%!assert (toupper ({"abc", "def", {"ghi", {"jkl"}}}),
+%!        {"ABC", "DEF", {"GHI", {"JKL"}}})
 %!assert (toupper (["abc"; "def"]), ["ABC"; "DEF"])
 %!assert (toupper ({["abc"; "def"]}), {["ABC";"DEF"]})
-%!assert (toupper (["ABCÄÖÜSS"; "abcäöüß"]), ["ABCÄÖÜSS"; "ABCÄÖÜSS"])
+%!assert (toupper (["ABCÄÖÜSS"; "abcäöüß"]),
+%!        ["ABCÄÖÜSS"; "ABCÄÖÜSS"])
 %!assert (toupper (repmat ("äöü", 2, 1, 3)), repmat ("ÄÖÜ", 2, 1, 3))
 %!assert (toupper (100), 100)
 %!assert (toupper ({[100, 100; 100, 100]}), {[100, 100; 100, 100]})
--- a/libinterp/corefcn/matrix_type.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/matrix_type.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -458,10 +458,13 @@
 
 %!assert (matrix_type (speye (10,10)), "Diagonal")
 %!assert (matrix_type (speye (10,10)([2:10,1],:)), "Permuted Diagonal")
-%!assert (matrix_type ([[speye(10,10);sparse(1,10)],[1;sparse(9,1);1]]), "Upper")
-%!assert (matrix_type ([[speye(10,10);sparse(1,10)],[1;sparse(9,1);1]](:,[2,1,3:11])), "Permuted Upper")
+%!assert (matrix_type ([[speye(10,10);sparse(1,10)],[1;sparse(9,1);1]]),
+%!        "Upper")
+%!assert (matrix_type ([[speye(10,10);sparse(1,10)],[1;sparse(9,1);1]](:,[2,1,3:11])),
+%!        "Permuted Upper")
 %!assert (matrix_type ([speye(10,10),sparse(10,1);1,sparse(1,9),1]), "Lower")
-%!assert (matrix_type ([speye(10,10),sparse(10,1);1,sparse(1,9),1]([2,1,3:11],:)), "Permuted Lower")
+%!assert (matrix_type ([speye(10,10),sparse(10,1);1,sparse(1,9),1]([2,1,3:11],:)),
+%!        "Permuted Lower")
 
 %!test
 %! bnd = spparms ("bandden");
@@ -486,30 +489,40 @@
 %!assert (matrix_type (speye (10,11)([2:10,1],:)), "Permuted Diagonal")
 %!assert (matrix_type (speye (11,10)), "Diagonal")
 %!assert (matrix_type (speye (11,10)([2:11,1],:)), "Permuted Diagonal")
-%#!assert (matrix_type ([[speye(10,10);sparse(1,10)],[[1,1];sparse(9,2);[1,1]]]), "Upper")
-%#!assert (matrix_type ([[speye(10,10);sparse(1,10)],[[1,1];sparse(9,2);[1,1]]](:,[2,1,3:12])), "Permuted Upper")
+%!#assert (matrix_type ([[speye(10,10);sparse(1,10)],[[1,1];sparse(9,2);[1,1]]]), "Upper")
+%!#assert (matrix_type ([[speye(10,10);sparse(1,10)],[[1,1];sparse(9,2);[1,1]]](:,[2,1,3:12])), "Permuted Upper")
 %!assert (matrix_type ([speye(11,9),[1;sparse(8,1);1;0]]), "Upper")
-%!assert (matrix_type ([speye(11,9),[1;sparse(8,1);1;0]](:,[2,1,3:10])), "Permuted Upper")
-%#!assert (matrix_type ([speye(10,10),sparse(10,1);[1;1],sparse(2,9),[1;1]]), "Lower")
-%#!assert (matrix_type ([speye(10,10),sparse(10,1);[1;1],sparse(2,9),[1;1]]([2,1,3:12],:)), "Permuted Lower")
+%!assert (matrix_type ([speye(11,9),[1;sparse(8,1);1;0]](:,[2,1,3:10])),
+%!        "Permuted Upper")
+
+%!#assert (matrix_type ([speye(10,10),sparse(10,1);[1;1],sparse(2,9),[1;1]]),
+%!         "Lower")
+%!#assert (matrix_type ([speye(10,10),sparse(10,1);[1;1],sparse(2,9),[1;1]]([2,1,3:12],:)),
+%!         "Permuted Lower")
 %!assert (matrix_type ([speye(9,11);[1,sparse(1,8),1,0]]), "Lower")
-%!assert (matrix_type ([speye(9,11);[1,sparse(1,8),1,0]]([2,1,3:10],:)), "Permuted Lower")
+%!assert (matrix_type ([speye(9,11);[1,sparse(1,8),1,0]]([2,1,3:10],:)),
+%!        "Permuted Lower")
 %!assert (matrix_type (spdiags (randn (10,4),[-2:1],10,9)), "Rectangular")
 
 %!assert (matrix_type (1i*speye (10,10)), "Diagonal")
 %!assert (matrix_type (1i*speye (10,10)([2:10,1],:)), "Permuted Diagonal")
-%!assert (matrix_type ([[speye(10,10);sparse(1,10)],[1i;sparse(9,1);1]]), "Upper")
-%!assert (matrix_type ([[speye(10,10);sparse(1,10)],[1i;sparse(9,1);1]](:,[2,1,3:11])), "Permuted Upper")
+%!assert (matrix_type ([[speye(10,10);sparse(1,10)],[1i;sparse(9,1);1]]),
+%!        "Upper")
+%!assert (matrix_type ([[speye(10,10);sparse(1,10)],[1i;sparse(9,1);1]](:,[2,1,3:11])),
+%!        "Permuted Upper")
 %!assert (matrix_type ([speye(10,10),sparse(10,1);1i,sparse(1,9),1]), "Lower")
-%!assert (matrix_type ([speye(10,10),sparse(10,1);1i,sparse(1,9),1]([2,1,3:11],:)), "Permuted Lower")
+%!assert (matrix_type ([speye(10,10),sparse(10,1);1i,sparse(1,9),1]([2,1,3:11],:)),
+%!        "Permuted Lower")
 
 %!test
 %! bnd = spparms ("bandden");
 %! spparms ("bandden", 0.5);
-%! assert (matrix_type (spdiags (1i*randn (10,3),[-1,0,1],10,10)), "Tridiagonal");
+%! assert (matrix_type (spdiags (1i*randn (10,3),[-1,0,1],10,10)),
+%!         "Tridiagonal");
 %! a = 1i*(rand (9,1)-0.5);
 %! a = [[a;0],ones(10,1),[0;-a]];
-%! assert (matrix_type (spdiags (a,[-1,0,1],10,10)), "Tridiagonal Positive Definite");
+%! assert (matrix_type (spdiags (a,[-1,0,1],10,10)),
+%!         "Tridiagonal Positive Definite");
 %! spparms ("bandden", bnd);
 %!test
 %! bnd = spparms ("bandden");
@@ -528,14 +541,16 @@
 %!assert (matrix_type (1i*speye (10,11)([2:10,1],:)), "Permuted Diagonal")
 %!assert (matrix_type (1i*speye (11,10)), "Diagonal")
 %!assert (matrix_type (1i*speye (11,10)([2:11,1],:)), "Permuted Diagonal")
-%#!assert (matrix_type ([[speye(10,10);sparse(1,10)],[[1i,1i];sparse(9,2);[1i,1i]]]), "Upper")
-%#!assert (matrix_type ([[speye(10,10);sparse(1,10)],[[1i,1i];sparse(9,2);[1i,1i]]](:,[2,1,3:12])), "Permuted Upper")
+%!#assert (matrix_type ([[speye(10,10);sparse(1,10)],[[1i,1i];sparse(9,2);[1i,1i]]]), "Upper")
+%!#assert (matrix_type ([[speye(10,10);sparse(1,10)],[[1i,1i];sparse(9,2);[1i,1i]]](:,[2,1,3:12])), "Permuted Upper")
 %!assert (matrix_type ([speye(11,9),[1i;sparse(8,1);1i;0]]), "Upper")
-%!assert (matrix_type ([speye(11,9),[1i;sparse(8,1);1i;0]](:,[2,1,3:10])), "Permuted Upper")
-%#!assert (matrix_type ([speye(10,10),sparse(10,1);[1i;1i],sparse(2,9),[1i;1i]]), "Lower")
-%#!assert (matrix_type ([speye(10,10),sparse(10,1);[1i;1i],sparse(2,9),[1i;1i]]([2,1,3:12],:)), "Permuted Lower")
+%!assert (matrix_type ([speye(11,9),[1i;sparse(8,1);1i;0]](:,[2,1,3:10])),
+%!        "Permuted Upper")
+%!#assert (matrix_type ([speye(10,10),sparse(10,1);[1i;1i],sparse(2,9),[1i;1i]]), "Lower")
+%!#assert (matrix_type ([speye(10,10),sparse(10,1);[1i;1i],sparse(2,9),[1i;1i]]([2,1,3:12],:)), "Permuted Lower")
 %!assert (matrix_type ([speye(9,11);[1i,sparse(1,8),1i,0]]), "Lower")
-%!assert (matrix_type ([speye(9,11);[1i,sparse(1,8),1i,0]]([2,1,3:10],:)), "Permuted Lower")
+%!assert (matrix_type ([speye(9,11);[1i,sparse(1,8),1i,0]]([2,1,3:10],:)),
+%!        "Permuted Lower")
 %!assert (matrix_type (1i*spdiags(randn(10,4),[-2:1],10,9)), "Rectangular")
 
 %!test
--- a/libinterp/corefcn/max.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/max.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -248,7 +248,7 @@
 
   octave_value_list retval (nargout > 1 ? 2 : 1);
 
-  const char *func = (ismin ? "min" : "max");
+  const char *fcn = (ismin ? "min" : "max");
 
   if (nargin == 3 || nargin == 1)
     {
@@ -259,10 +259,10 @@
           dim = args(2).int_value (true) - 1;
 
           if (dim < 0)
-            error ("%s: DIM must be a valid dimension", func);
+            error ("%s: DIM must be a valid dimension", fcn);
 
           if (! args(1).isempty ())
-            warning ("%s: second argument is ignored", func);
+            warning ("%s: second argument is ignored", fcn);
         }
 
       switch (arg.builtin_type ())
@@ -290,7 +290,8 @@
                     retval(0) = range.max ();
                     if (nargout > 1)
                       retval(1) = static_cast<double>
-                                  (range.increment () >= 0 ? range.numel () : 1);
+                                  (range.increment () >= 0 ? range.numel ()
+                                                           : 1);
                   }
               }
             else if (arg.issparse ())
@@ -347,7 +348,7 @@
           break;
 
         default:
-          err_wrong_type_arg (func, arg);
+          err_wrong_type_arg (fcn, arg);
         }
     }
   else
@@ -424,7 +425,7 @@
         //   break;
 
         default:
-          error ("%s: cannot compute %s (%s, %s)", func, func,
+          error ("%s: cannot compute %s (%s, %s)", fcn, fcn,
                  argx.type_name ().c_str (), argy.type_name ().c_str ());
         }
 
@@ -439,10 +440,10 @@
 
 DEFUN (min, args, nargout,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} min (@var{x})
-@deftypefnx {} {} min (@var{x}, [], @var{dim})
-@deftypefnx {} {[@var{w}, @var{iw}] =} min (@var{x})
-@deftypefnx {} {} min (@var{x}, @var{y})
+@deftypefn  {} {@var{m} =} min (@var{x})
+@deftypefnx {} {@var{m} =} min (@var{x}, [], @var{dim})
+@deftypefnx {} {[@var{m}, @var{im}] =} min (@var{x})
+@deftypefnx {} {@var{m} =} min (@var{x}, @var{y})
 Find minimum values in the array @var{x}.
 
 For a vector argument, return the minimum value.  For a matrix argument,
@@ -661,10 +662,10 @@
 
 DEFUN (max, args, nargout,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} max (@var{x})
-@deftypefnx {} {} max (@var{x}, [], @var{dim})
-@deftypefnx {} {[@var{w}, @var{iw}] =} max (@var{x})
-@deftypefnx {} {} max (@var{x}, @var{y})
+@deftypefn  {} {@var{m} =} max (@var{x})
+@deftypefnx {} {@var{m} =} max (@var{x}, [], @var{dim})
+@deftypefnx {} {[@var{m}, @var{im}] =} max (@var{x})
+@deftypefnx {} {@var{m} =} max (@var{x}, @var{y})
 Find maximum values in the array @var{x}.
 
 For a vector argument, return the maximum value.  For a matrix argument,
@@ -924,7 +925,7 @@
   if (nargin < 1 || nargin > 2)
     print_usage ();
 
-  const char *func = (ismin ? "cummin" : "cummax");
+  const char *fcn = (ismin ? "cummin" : "cummax");
 
   octave_value arg = args(0);
   int dim = -1;
@@ -933,7 +934,7 @@
       dim = args(1).int_value (true) - 1;
 
       if (dim < 0)
-        error ("%s: DIM must be a valid dimension", func);
+        error ("%s: DIM must be a valid dimension", fcn);
     }
 
   octave_value_list retval;
@@ -984,7 +985,7 @@
       break;
 
     default:
-      err_wrong_type_arg (func, arg);
+      err_wrong_type_arg (fcn, arg);
     }
 
   return retval;
@@ -992,9 +993,9 @@
 
 DEFUN (cummin, args, nargout,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} cummin (@var{x})
-@deftypefnx {} {} cummin (@var{x}, @var{dim})
-@deftypefnx {} {[@var{w}, @var{iw}] =} cummin (@var{x})
+@deftypefn  {} {@var{M} =} cummin (@var{x})
+@deftypefnx {} {@var{M} =} cummin (@var{x}, @var{dim})
+@deftypefnx {} {[@var{M}, @var{IM}] =} cummin (@var{x})
 Return the cumulative minimum values along dimension @var{dim}.
 
 If @var{dim} is unspecified it defaults to column-wise operation.  For
@@ -1012,10 +1013,10 @@
 
 @example
 @group
-[w, iw] = cummin ([5 4 6 2 3 1])
+[M, IM] = cummin ([5 4 6 2 3 1])
 @result{}
-w =  5  4  4  2  2  1
-iw = 1  2  2  4  4  6
+M =  5  4  4  2  2  1
+IM = 1  2  2  4  4  6
 @end group
 @end example
 
@@ -1047,9 +1048,9 @@
 
 DEFUN (cummax, args, nargout,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} cummax (@var{x})
-@deftypefnx {} {} cummax (@var{x}, @var{dim})
-@deftypefnx {} {[@var{w}, @var{iw}] =} cummax (@dots{})
+@deftypefn  {} {@var{M} =} cummax (@var{x})
+@deftypefnx {} {@var{M} =} cummax (@var{x}, @var{dim})
+@deftypefnx {} {[@var{M}, @var{IM}] =} cummax (@dots{})
 Return the cumulative maximum values along dimension @var{dim}.
 
 If @var{dim} is unspecified it defaults to column-wise operation.  For
@@ -1069,8 +1070,8 @@
 @group
 [w, iw] = cummax ([1 3 2 6 4 5])
 @result{}
-w =  1  3  3  6  6  6
-iw = 1  2  2  4  4  4
+M =  1  3  3  6  6  6
+IM = 1  2  2  4  4  4
 @end group
 @end example
 
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libinterp/corefcn/mex-private.h	Mon Aug 29 13:58:00 2022 +0200
@@ -0,0 +1,39 @@
+////////////////////////////////////////////////////////////////////////
+//
+// Copyright (C) 2022 The Octave Project Developers
+//
+// See the file COPYRIGHT.md in the top-level directory of this
+// distribution or <https://octave.org/copyright/>.
+//
+// This file is part of Octave.
+//
+// Octave is free software: you can redistribute it and/or modify it
+// under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Octave is distributed in the hope that it will be useful, but
+// WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Octave; see the file COPYING.  If not, see
+// <https://www.gnu.org/licenses/>.
+//
+////////////////////////////////////////////////////////////////////////
+
+#if ! defined (octave_mex_private_h)
+#define octave_mex_private_h 1
+
+#include "octave-config.h"
+
+OCTAVE_NAMESPACE_BEGIN
+
+extern OCTINTERP_API octave_value_list
+call_mex (octave_mex_function& mex_fcn, const octave_value_list& args,
+          int nargout_arg);
+
+OCTAVE_NAMESPACE_END
+
+#endif
--- a/libinterp/corefcn/mex.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/mex.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -489,7 +489,7 @@
     mxArray *retval = m_val.as_mxArray (m_interleaved);
 
     // RETVAL is assumed to be an mxArray_matlab object.  Should we
-    // assert that condition here?
+    // error_unless that condition here?
 
     if (retval)
       {
@@ -799,9 +799,11 @@
 
   GET_DATA_METHOD (mxUint64, get_uint64s, mxUINT64_CLASS, mxREAL);
 
-  GET_DATA_METHOD (mxComplexDouble, get_complex_doubles, mxDOUBLE_CLASS, mxCOMPLEX);
-
-  GET_DATA_METHOD (mxComplexSingle, get_complex_singles, mxDOUBLE_CLASS, mxCOMPLEX);
+  GET_DATA_METHOD (mxComplexDouble, get_complex_doubles,
+                   mxDOUBLE_CLASS, mxCOMPLEX);
+
+  GET_DATA_METHOD (mxComplexSingle, get_complex_singles,
+                   mxDOUBLE_CLASS, mxCOMPLEX);
 
 #if 0
   /* We don't have these yet. */
@@ -1558,8 +1560,8 @@
 protected:
 
   mxArray_matlab (bool interleaved, mxClassID id = mxUNKNOWN_CLASS)
-    : mxArray_base (interleaved), m_class_name (nullptr), m_id (id), m_ndims (0),
-      m_dims (nullptr)
+    : mxArray_base (interleaved), m_class_name (nullptr), m_id (id),
+      m_ndims (0), m_dims (nullptr)
   { }
 
   mxArray_matlab (bool interleaved, mxClassID id, mwSize ndims,
@@ -1609,7 +1611,8 @@
   }
 
   mxArray_matlab (bool interleaved, mxClassID id, mwSize m, mwSize n)
-    : mxArray_base (interleaved), m_class_name (nullptr), m_id (id), m_ndims (2),
+    : mxArray_base (interleaved), m_class_name (nullptr), m_id (id),
+      m_ndims (2),
       m_dims (static_cast<mwSize *> (mxArray::malloc (m_ndims * sizeof (mwSize))))
   {
     m_dims[0] = m;
@@ -3445,8 +3448,7 @@
   {
     if (! m_fname)
       {
-        octave::tree_evaluator& tw
-          = octave::__get_evaluator__ ("mex::function_name");
+        octave::tree_evaluator& tw = octave::__get_evaluator__ ();
 
         octave_function *fcn = tw.current_function ();
 
@@ -4774,6 +4776,8 @@
 typedef F77_RET_T (*fmex_fptr) (F77_INT& nlhs, mxArray **plhs,
                                 F77_INT& nrhs, mxArray **prhs);
 
+OCTAVE_NAMESPACE_BEGIN
+
 octave_value_list
 call_mex (octave_mex_function& mex_fcn, const octave_value_list& args,
           int nargout_arg)
@@ -4845,6 +4849,8 @@
   return retval;
 }
 
+OCTAVE_NAMESPACE_END
+
 // C interface to mex functions:
 
 const char *
@@ -4888,7 +4894,7 @@
 {
   octave_value_list args = mx_to_ov_args (nargin, argin);
 
-  octave::interpreter& interp = octave::__get_interpreter__ ("mexCallMATLAB");
+  octave::interpreter& interp = octave::__get_interpreter__ ();
 
   bool execution_error = false;
 
@@ -4985,7 +4991,7 @@
 {
   int retval = 0;
 
-  octave::interpreter& interp = octave::__get_interpreter__ ("mexEvalString");
+  octave::interpreter& interp = octave::__get_interpreter__ ();
 
   int parse_status;
   bool execution_error = false;
@@ -5014,7 +5020,7 @@
 {
   mxArray *mx = nullptr;
 
-  octave::interpreter& interp = octave::__get_interpreter__ ("mexEvalString");
+  octave::interpreter& interp = octave::__get_interpreter__ ();
 
   int parse_status;
   bool execution_error = false;
@@ -5152,7 +5158,7 @@
 
   octave_value val;
 
-  octave::interpreter& interp = octave::__get_interpreter__ ("mexGetVariable");
+  octave::interpreter& interp = octave::__get_interpreter__ ();
 
   if (! strcmp (space, "global"))
     val = interp.global_varval (name);
@@ -5217,7 +5223,7 @@
   if (! name || name[0] == '\0')
     return 1;
 
-  octave::interpreter& interp = octave::__get_interpreter__ ("mexPutVariable");
+  octave::interpreter& interp = octave::__get_interpreter__ ();
 
   if (! strcmp (space, "global"))
     {
@@ -5347,7 +5353,7 @@
     {
       const char *fname = mexFunctionName ();
 
-      octave::interpreter& interp = octave::__get_interpreter__ ("mexIsLocked");
+      octave::interpreter& interp = octave::__get_interpreter__ ();
 
       retval = interp.mislocked (fname);
     }
@@ -5369,7 +5375,7 @@
       else
         mex_lock_count[fname]++;
 
-      octave::interpreter& interp = octave::__get_interpreter__ ("mexLock");
+      octave::interpreter& interp = octave::__get_interpreter__ ();
 
       interp.mlock ();
     }
@@ -5411,8 +5417,7 @@
 
           if (count == 0)
             {
-              octave::interpreter& interp
-                = octave::__get_interpreter__ ("mexUnLock");
+              octave::interpreter& interp = octave::__get_interpreter__ ();
 
               interp.munlock (fname);
 
--- a/libinterp/corefcn/module.mk	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/module.mk	Mon Aug 29 13:58:00 2022 +0200
@@ -103,6 +103,7 @@
 
 NOINSTALL_COREFCN_INC = \
   %reldir%/interpreter-private.h \
+  %reldir%/mex-private.h \
   %reldir%/oct-hdf5.h \
   %reldir%/oct-opengl.h
 
@@ -231,6 +232,7 @@
   %reldir%/ordschur.cc \
   %reldir%/pager.cc \
   %reldir%/pinv.cc \
+  %reldir%/pow2.cc \
   %reldir%/pr-flt-fmt.cc \
   %reldir%/pr-output.cc \
   %reldir%/procstream.cc \
--- a/libinterp/corefcn/mxarray.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/mxarray.h	Mon Aug 29 13:58:00 2022 +0200
@@ -652,7 +652,8 @@
   void set_field_by_number (mwIndex index, int key_num, mxArray *val)
   { DO_VOID_MUTABLE_METHOD (set_field_by_number (index, key_num, val)); }
 
-  int get_number_of_fields (void) const { return m_rep->get_number_of_fields (); }
+  int get_number_of_fields (void) const
+  { return m_rep->get_number_of_fields (); }
 
   const char * get_field_name_by_number (int key_num) const
   { DO_MUTABLE_METHOD (const char*, get_field_name_by_number (key_num)); }
@@ -668,7 +669,8 @@
   mwIndex calc_single_subscript (mwSize nsubs, mwIndex *subs) const
   { return m_rep->calc_single_subscript (nsubs, subs); }
 
-  std::size_t get_element_size (void) const { return m_rep->get_element_size (); }
+  std::size_t get_element_size (void) const
+  { return m_rep->get_element_size (); }
 
   bool mutation_needed (void) const { return m_rep->mutation_needed (); }
 
--- a/libinterp/corefcn/nproc.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/nproc.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -36,8 +36,8 @@
 
 DEFUN (nproc, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} nproc ()
-@deftypefnx {} {} nproc (@var{query})
+@deftypefn  {} {@var{n} =} nproc ()
+@deftypefnx {} {@var{n} =} nproc (@var{query})
 Return the current number of available (logical) processors.
 
 This returns the number of logical processors.  For processors with
--- a/libinterp/corefcn/oct-errno.in.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/oct-errno.in.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -321,7 +321,8 @@
 int
 octave_errno::do_lookup (const std::string& name)
 {
-  return (m_errno_tbl.find (name) != m_errno_tbl.end ()) ? m_errno_tbl[name] : -1;
+  return (m_errno_tbl.find (name) != m_errno_tbl.end ()) ? m_errno_tbl[name]
+                                                         : -1;
 }
 
 octave_scalar_map
--- a/libinterp/corefcn/oct-hist.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/oct-hist.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -142,8 +142,7 @@
           {
             if (command_history::add (tmp))
               {
-                event_manager& evmgr
-                  = __get_event_manager__ ("edit_history_add_hist");
+                event_manager& evmgr = __get_event_manager__ ();
 
                 evmgr.append_history (tmp);
               }
@@ -614,7 +613,6 @@
 @end deftypefn */)
 {
   // FIXME: should this be limited to the top-level context?
-
   if (args.length () > 2)
     print_usage ();
 
@@ -629,8 +627,8 @@
            doc: /* -*- texinfo -*-
 @deftypefn  {} {} history
 @deftypefnx {} {} history @var{opt1} @dots{}
-@deftypefnx {} {@var{h} =} history ()
-@deftypefnx {} {@var{h} =} history (@var{opt1}, @dots{})
+@deftypefnx {} {@var{H} =} history ()
+@deftypefnx {} {@var{H} =} history (@var{opt1}, @dots{})
 If invoked with no arguments, @code{history} displays a list of commands
 that you have executed.
 
@@ -867,7 +865,7 @@
            doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} history_timestamp_format_string ()
 @deftypefnx {} {@var{old_val} =} history_timestamp_format_string (@var{new_val})
-@deftypefnx {} {} history_timestamp_format_string (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} history_timestamp_format_string (@var{new_val}, "local")
 Query or set the internal variable that specifies the format string
 for the comment line that is written to the history file when Octave
 exits.
@@ -902,7 +900,7 @@
        doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} history_save ()
 @deftypefnx {} {@var{old_val} =} history_save (@var{new_val})
-@deftypefnx {} {} history_save (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} history_save (@var{new_val}, "local")
 Query or set the internal variable that controls whether commands entered
 on the command line are saved in the history file.
 
--- a/libinterp/corefcn/oct-map.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/oct-map.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -498,8 +498,6 @@
 octave_map
 octave_map::transpose (void) const
 {
-  assert (ndims () == 2);
-
   octave_map retval (m_keys);
 
   retval.m_dimensions = dim_vector (m_dimensions (1), m_dimensions (0));
@@ -614,7 +612,7 @@
   for (octave_idx_type j = 0; j < nf; j++)
     {
       retval.m_vals.push_back (Cell (rd));
-      assert (retval.m_vals[j].numel () == n);
+      error_unless (retval.m_vals[j].numel () == n);
       for (octave_idx_type i = 0; i < n; i++)
         retval.m_vals[j].xelem (i) = map_list[i].m_vals[j];
     }
@@ -984,7 +982,8 @@
 octave_map
 octave_map::page (octave_idx_type k) const
 {
-  static Array<octave::idx_vector> ia (dim_vector (3, 1), octave::idx_vector::colon);
+  static Array<octave::idx_vector> ia (dim_vector (3, 1),
+                                       octave::idx_vector::colon);
 
   ia(2) = k;
   return index (ia);
@@ -1032,7 +1031,7 @@
           error (ee, "incompatible fields in struct assignment");
         }
 
-      assert (rhs1.m_keys.is_same (m_keys));
+      error_unless (rhs1.m_keys.is_same (m_keys));
       assign (i, rhs1);
     }
 }
@@ -1080,7 +1079,7 @@
           error (ee, "incompatible fields in struct assignment");
         }
 
-      assert (rhs1.m_keys.is_same (m_keys));
+      error_unless (rhs1.m_keys.is_same (m_keys));
       assign (i, j, rhs1);
     }
 }
@@ -1128,7 +1127,7 @@
           error (ee, "incompatible fields in struct assignment");
         }
 
-      assert (rhs1.m_keys.is_same (m_keys));
+      error_unless (rhs1.m_keys.is_same (m_keys));
       assign (ia, rhs1);
     }
 }
--- a/libinterp/corefcn/oct-opengl.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/oct-opengl.h	Mon Aug 29 13:58:00 2022 +0200
@@ -70,9 +70,9 @@
     // class that does nothing.  This makes the implementation of
     // other things that rely on this class slightly simpler.
 
-    virtual void glAlphaFunc (GLenum func, GLclampf ref)
+    virtual void glAlphaFunc (GLenum fcn, GLclampf ref)
     {
-      ::glAlphaFunc (func, ref);
+      ::glAlphaFunc (fcn, ref);
     }
 
     virtual void glBegin (GLenum mode)
@@ -160,9 +160,9 @@
       ::glDeleteTextures (n, textures);
     }
 
-    virtual void glDepthFunc (GLenum func)
+    virtual void glDepthFunc (GLenum fcn)
     {
-      ::glDepthFunc (func);
+      ::glDepthFunc (fcn);
     }
 
     virtual void glDisable (GLenum cap)
--- a/libinterp/corefcn/oct-stream.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/oct-stream.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -34,6 +34,7 @@
 #include <algorithm>
 #include <deque>
 #include <fstream>
+#include <limits>
 #include <iomanip>
 #include <iostream>
 #include <sstream>
@@ -42,7 +43,6 @@
 #include "Array.h"
 #include "Cell.h"
 #include "byte-swap.h"
-#include "lo-cutils.h"
 #include "lo-ieee.h"
 #include "lo-mappers.h"
 #include "lo-utils.h"
@@ -50,6 +50,7 @@
 #include "octave-preserve-stream-state.h"
 #include "quit.h"
 #include "str-vec.h"
+#include "strcase-wrappers.h"
 
 #include "error.h"
 #include "errwarn.h"
@@ -99,7 +100,7 @@
       }
     catch (const execution_exception&)
       {
-        interpreter& interp = __get_interpreter__ ("convert_to_valid_int");
+        interpreter& interp = __get_interpreter__ ();
 
         interp.recover_from_exception ();
 
@@ -351,9 +352,9 @@
     void add_elt_to_list (int width, bool discard, char type, char modifier,
                           const std::string& char_class = "");
 
-    void process_conversion (const std::string& s, std::size_t& i, std::size_t n,
-                             int& width, bool& discard, char& type,
-                             char& modifier);
+    void process_conversion (const std::string& s, std::size_t& i,
+                             std::size_t n, int& width, bool& discard,
+                             char& type, char& modifier);
 
     int finish_conversion (const std::string& s, std::size_t& i, std::size_t n,
                            int width, bool discard, char& type,
@@ -1248,7 +1249,7 @@
 
     // Load new data into buffer, and set eob, last, idx.
     // Return EOF at end of file, 0 otherwise.
-    int refresh_buf (void);
+    int refresh_buf (bool initialize = false);
 
     // Get a character, relying on caller to call field_done if
     // a delimiter has been reached.
@@ -1293,7 +1294,7 @@
 
     bool eof (void)
     {
-      return (m_eob == m_buf && m_i_stream.eof ())
+      return (m_eob == m_buf + m_overlap && m_i_stream.eof ())
               || (m_flags & std::ios_base::eofbit);
     }
 
@@ -1319,6 +1320,17 @@
 
     bool no_progress (void) { return m_progress_marker == m_idx; }
 
+    // Number of characters remaining until end of stream if it is already
+    // buffered. int_max otherwise.
+
+    std::ptrdiff_t remaining (void)
+    {
+      if (m_eob < m_buf + m_bufsize)
+        return m_eob - m_idx;
+      else
+        return std::numeric_limits<std::ptrdiff_t>::max ();
+    }
+
   private:
 
     // Number of characters to read from the file at once.
@@ -1340,6 +1352,9 @@
     // Position after last character in buffer.
     char *m_eob;
 
+    // Overlap with old content when refreshing buffer.
+    std::ptrdiff_t m_overlap;
+
     // True if there is delimiter in the buffer after idx.
     bool m_delimited;
 
@@ -1374,7 +1389,7 @@
     m_eob = m_buf + m_bufsize;
     m_idx = m_eob;                // refresh_buf shouldn't try to copy old data
     m_progress_marker = m_idx;
-    refresh_buf ();               // load the first batch of data
+    refresh_buf (true);           // load the first batch of data
   }
 
   // Used to create a stream from a strstream from data read from a dstr.
@@ -1390,7 +1405,7 @@
       {
         m_i_stream.clear ();
         m_i_stream.seekg (m_buf_in_file);
-        m_i_stream.read (m_buf, m_idx - m_buf);
+        m_i_stream.read (m_buf, m_idx - m_buf - m_overlap);
       }
 
     delete [] m_buf;
@@ -1448,7 +1463,7 @@
   // processed.
 
   int
-  delimited_stream::refresh_buf (void)
+  delimited_stream::refresh_buf (bool initialize)
   {
     if (eof ())
       return std::istream::traits_type::eof ();
@@ -1459,36 +1474,54 @@
       m_idx = m_eob;
 
     std::size_t old_remaining = m_eob - m_idx;
+    std::size_t old_overlap = 0;
+
+    if (initialize || (m_idx - m_buf <= 0))
+      m_overlap = 0;
+    else
+      {
+        old_overlap = m_overlap;
+        // Retain the last 25 bytes in the buffer.  That should be more than enough
+        // to putback an entire double precision floating point number in decimal
+        // including 3 digit exponent and signs.  Do we ever need to putback more
+        // than that?
+        m_overlap = 25;
+        // Assure we don't "underflow" with the overlap
+        m_overlap = std::min (m_overlap, m_idx - m_buf - 1);
+      }
 
     octave_quit ();                       // allow ctrl-C
 
-    if (old_remaining > 0)
-      {
-        m_buf_in_file += (m_idx - m_buf);
-        memmove (m_buf, m_idx, old_remaining);
+    if (old_remaining + m_overlap > 0)
+      {
+        m_buf_in_file += (m_idx - old_overlap - m_buf);
+        std::memmove (m_buf, m_idx - m_overlap, m_overlap + old_remaining);
       }
     else
       m_buf_in_file = m_i_stream.tellg ();  // record for destructor
 
-    m_progress_marker -= m_idx - m_buf;  // where original idx would have been
-    m_idx = m_buf;
+    // where original idx would have been
+    m_progress_marker -= m_idx - m_overlap - m_buf;
+    m_idx = m_buf + m_overlap;
 
     int gcount;   // chars read
     if (! m_i_stream.eof ())
       {
-        m_i_stream.read (m_buf + old_remaining, m_bufsize - old_remaining);
+        m_i_stream.read (m_buf + m_overlap + old_remaining,
+                         m_bufsize - m_overlap - old_remaining);
         gcount = m_i_stream.gcount ();
       }
     else
       gcount = 0;
 
-    m_eob = m_buf + old_remaining + gcount;
+    m_eob = m_buf + m_overlap + old_remaining + gcount;
     m_last = m_eob;
     if (gcount == 0)
       {
         m_delimited = false;
 
-        if (m_eob != m_buf)   // no more data in file, but still some to go
+        if (m_eob != m_buf + m_overlap)
+          // no more data in file, but still some to go
           retval = 0;
         else
           // file and buffer are both done.
@@ -1498,13 +1531,14 @@
       {
         m_delimited = true;
 
-        for (m_last = m_eob - m_longest; m_last - m_buf >= 0; m_last--)
+        for (m_last = m_eob - m_longest; m_last - m_buf - m_overlap >= 0;
+             m_last--)
           {
             if (m_delims.find (*m_last) != std::string::npos)
               break;
           }
 
-        if (m_last < m_buf)
+        if (m_last < m_buf + m_overlap)
           m_delimited = false;
 
         retval = 0;
@@ -1528,7 +1562,7 @@
   {
     char *retval;
 
-    if (m_eob - m_idx > size)
+    if (m_eob - m_idx >= size)
       {
         retval = m_idx;
         m_idx += size;
@@ -1755,7 +1789,8 @@
 
     int read_first_row (delimited_stream& is, textscan& ts);
 
-    std::list<octave_value> out_buf (void) const { return (m_output_container); }
+    std::list<octave_value> out_buf (void) const
+    { return (m_output_container); }
 
   private:
 
@@ -2616,8 +2651,8 @@
       }
     // Finally, create the stream.
     delimited_stream is (isp,
-                         (m_delim_table.empty () ? m_whitespace + "\r\n"
-                                               : m_delims),
+                         (m_delims.empty () ? m_whitespace + "\r\n"
+                                            : m_delims),
                          max_lookahead, buf_size);
 
     // Grow retval dynamically.  "size" is half the initial size
@@ -2792,12 +2827,12 @@
     double retval = 0;
     bool valid = false;         // syntactically correct double?
 
-    int ch = is.peek ();
+    int ch = is.peek_undelim ();
 
     if (ch == '+')
       {
         is.get ();
-        ch = is.peek ();
+        ch = is.peek_undelim ();
         if (width_left)
           width_left--;
       }
@@ -2805,7 +2840,7 @@
       {
         sign = -1;
         is.get ();
-        ch = is.peek ();
+        ch = is.peek_undelim ();
         if (width_left)
           width_left--;
       }
@@ -2853,6 +2888,11 @@
 
         if (i > 0)
           valid = true;           // valid if at least one digit after '.'
+        else if (! valid)         // if there was nothing before and after '.'
+          {
+            is.putback (ch);
+            ch = '.';
+          }
 
         // skip remainder after '.', to field width, to look for exponent
         if (i == precision)
@@ -2866,7 +2906,7 @@
     bool used_exp = false;
     if (valid && width_left > 1 && m_exp_chars.find (ch) != std::string::npos)
       {
-        int ch1 = is.peek ();
+        int ch1 = is.peek_undelim ();
         if (ch1 == '-' || ch1 == '+' || (ch1 >= '0' && ch1 <= '9'))
           {
             // if 1.0e+$ or some such, this will set failbit, as we want
@@ -2885,7 +2925,7 @@
                 is.get ();
               }
             valid = false;
-            while (width_left-- && is && (ch = is.get ()) >= '0' && ch <= '9')
+            while (width_left-- && is && (ch = is.get_undelim ()) >= '0' && ch <= '9')
               {
                 exp = exp*10 + ch - '0';
                 valid = true;
@@ -2908,9 +2948,9 @@
       is.putback (ch);
 
     // Check for +/- inf and NaN
-    if (! valid && width_left >= 3)
-      {
-        int i = lookahead (is, m_inf_nan, 3, false);  // false -> case insensitive
+    if (! valid && width_left >= 3 && is.remaining () >= 3)
+      {
+        int i = lookahead (is, m_inf_nan, 3, false);  // false->case insensitive
         if (i == 0)
           {
             retval = numeric_limits<double>::Inf ();
@@ -2944,23 +2984,23 @@
     bool as_empty = false;  // did we fail but match a "treat_as_empty" string?
     bool inf = false;
 
-    int ch = is.peek ();
+    int ch = is.peek_undelim ();
     if (ch == '+' || ch == '-')   // check for [+-][ij] with no coefficients
       {
         ch = is.get ();
-        int ch2 = is.peek ();
+        int ch2 = is.peek_undelim ();
         if (ch2 == 'i' || ch2 == 'j')
           {
             double value = 1;
             is.get ();
             // Check not -inf
-            if (is.peek () == 'n')
+            if (is.peek_undelim () == 'n')
               {
                 char *pos = is.tellg ();
                 std::ios::iostate state = is.rdstate ();
 
                 is.get ();
-                ch2 = is.get ();
+                ch2 = is.get_undelim ();
                 if (ch2 == 'f')
                   {
                     inf = true;
@@ -2971,6 +3011,8 @@
                 else
                   {
                     is.clear (state);
+                    // FIXME: Buffer might have refreshed.
+                    //        pos might no longer be valid.
                     is.seekg (pos);   // reset to position before look-ahead
                   }
               }
@@ -2986,6 +3028,7 @@
         char *pos = is.tellg ();
         std::ios::iostate state = is.rdstate ();
         //re = read_value<double> (is);
+        // FIXME: read_double might refresh the buffer.  So seekg might be off.
         re = read_double (is, fmt);
 
         // check for "treat as empty" string
@@ -3037,7 +3080,8 @@
           {
             state = is.rdstate ();   // before tellg, since that fails at EOF
 
-            ch = is.peek ();   // ch == EOF if read failed; no need to chk fail
+            ch = is.peek_undelim ();
+            // ch == EOF if read failed; no need to chk fail
             if (ch == 'i' || ch == 'j')           // pure imaginary
               {
                 is.get ();
@@ -3051,11 +3095,13 @@
                 state = is.rdstate ();
 
                 //im = read_value<double> (is);
+                // FIXME: read_double might refresh the buffer.
+                //        So seekg might be off after this.
                 im = read_double (is, fmt);
                 if (is.fail ())
                   im = 1;
 
-                if (is.peek () == 'i' || is.peek () == 'j')
+                if (is.peek_undelim () == 'i' || is.peek_undelim () == 'j')
                   is.get ();
                 else
                   {
@@ -3166,7 +3212,7 @@
               val.append (std::max (val.length (),
                                     static_cast<std::size_t> (16)), '\0');
 
-            int ch = is.get ();
+            int ch = is.get_undelim ();
             if (is_delim (ch) || ch == std::istream::traits_type::eof ())
               {
                 is.putback (ch);
@@ -3224,7 +3270,7 @@
   {
     skip_whitespace (is);
 
-    if (is.peek () != '"')
+    if (is.peek_undelim () != '"')
       scan_string (is, fmt, val);
     else
       {
@@ -3505,7 +3551,7 @@
               {
                 if (m_delim_list.isempty ())
                   {
-                    if (! is_delim (is.peek ()))
+                    if (! is_delim (is.peek_undelim ()))
                       this_conversion_failed = true;
                   }
                 else  // Cell array of multi-character delimiters
@@ -3929,7 +3975,7 @@
           {
             is.get ();
             if (c1 == m_eol1 && is.peek_undelim () == m_eol2)
-              is.get_undelim ();          // if \r\n, skip the \n too.
+              is.get ();          // if \r\n, skip the \n too.
 
             if (multiple_delims_as_one)
               {
@@ -4042,7 +4088,7 @@
   base_stream::clearerr (void)
   {
     std::istream *is = input_stream ();
-    std::ostream *os = output_stream ();
+    std::ostream *os = preferred_output_stream ();
 
     if (is)
       is->clear ();
@@ -4058,7 +4104,7 @@
   base_stream::do_gets (octave_idx_type max_len, bool& err,
                         bool strip_newline, const std::string& who)
   {
-    interpreter& interp = __get_interpreter__ ("base_stream::do_gets");
+    interpreter& interp = __get_interpreter__ ();
 
     if (interp.interactive () && file_number () == 0)
       ::error ("%s: unable to read from stdin while running interactively",
@@ -4175,7 +4221,7 @@
   off_t
   base_stream::skipl (off_t num, bool& err, const std::string& who)
   {
-    interpreter& interp = __get_interpreter__ ("base_stream::skipl");
+    interpreter& interp = __get_interpreter__ ();
 
     if (interp.interactive () && file_number () == 0)
       ::error ("%s: unable to read from stdin while running interactively",
@@ -4670,7 +4716,7 @@
                          octave_idx_type& conversion_count,
                          const std::string& who)
   {
-    interpreter& interp = __get_interpreter__ ("base_stream::do_scanf");
+    interpreter& interp = __get_interpreter__ ();
 
     if (interp.interactive () && file_number () == 0)
       ::error ("%s: unable to read from stdin while running interactively",
@@ -5297,7 +5343,7 @@
 
         // FIXME: is this the right thing to do?
 
-        interpreter& interp = __get_interpreter__ ("base_stream::do_oscanf");
+        interpreter& interp = __get_interpreter__ ();
 
         if (interp.interactive () && ! application::forced_interactive ()
             && name () == "stdin")
@@ -5392,7 +5438,7 @@
                             const std::string& who,
                             octave_idx_type& read_count)
   {
-    interpreter& interp = __get_interpreter__ ("base_stream::do_textscan");
+    interpreter& interp = __get_interpreter__ ();
 
     if (interp.interactive () && file_number () == 0)
       ::error ("%s: unable to read from stdin while running interactively",
@@ -5422,7 +5468,7 @@
   {
     int retval = -1;
 
-    std::ostream *os = output_stream ();
+    std::ostream *os = preferred_output_stream ();
 
     if (! os)
       invalid_operation ("fflush", "writing");
@@ -5632,24 +5678,23 @@
 
   template <typename T>
   static int
-  do_printf_conv (std::ostream& os, const std::string& encoding,
-                  const char *fmt, int nsa, int sa_1, int sa_2, T arg,
-                  const std::string& who)
+  do_printf_conv (std::ostream& os, const char *fmt, int nsa, int sa_1,
+                  int sa_2, T arg, const std::string& who)
   {
     int retval = 0;
 
     switch (nsa)
       {
       case 2:
-        retval = format (os, encoding, fmt, sa_1, sa_2, arg);
+        retval = format (os, fmt, sa_1, sa_2, arg);
         break;
 
       case 1:
-        retval = format (os, encoding, fmt, sa_1, arg);
+        retval = format (os, fmt, sa_1, arg);
         break;
 
       case 0:
-        retval = format (os, encoding, fmt, arg);
+        retval = format (os, fmt, arg);
         break;
 
       default:
@@ -5663,7 +5708,7 @@
   static std::size_t
   do_printf_string (std::ostream& os, const printf_format_elt *elt,
                     int nsa, int sa_1, int sa_2, const std::string& arg,
-                    const std::string& encoding, const std::string& who)
+                    const std::string& who)
   {
     if (nsa > 2)
       ::error ("%s: internal error handling format", who.c_str ());
@@ -5677,12 +5722,6 @@
     std::size_t prec = (nsa > 1 ? sa_2 : (elt->prec == -1 ? len : elt->prec));
 
     std::string print_str = prec < arg.length () ? arg.substr (0, prec) : arg;
-    if (encoding.compare ("utf-8"))
-      {
-        std::size_t src_len = print_str.length ();
-        print_str = string::u8_to_encoding (who, print_str, encoding);
-        len -= src_len - print_str.length ();
-      }
 
     std::size_t fw = (nsa > 0 ? sa_1 : (elt->fw == -1 ? len : elt->fw));
 
@@ -5809,8 +5848,8 @@
               tval = (lo_ieee_is_NA (dval) ? "NA" : "NaN");
           }
 
-        retval += do_printf_conv (os, encoding (), tfmt.c_str (), nsa, sa_1,
-                                  sa_2, tval, who);
+        retval += do_printf_conv (os, tfmt.c_str (), nsa, sa_1, sa_2, tval,
+                                  who);
       }
     else
       {
@@ -5829,8 +5868,8 @@
                 // Insert "long" modifier.
                 tfmt.replace (tfmt.rfind (type), 1, llmod + type);
 
-                retval += do_printf_conv (os, encoding (), tfmt.c_str (), nsa,
-                                          sa_1, sa_2, tval.value (), who);
+                retval += do_printf_conv (os, tfmt.c_str (), nsa, sa_1, sa_2,
+                                          tval.value (), who);
               }
             else
               {
@@ -5838,8 +5877,8 @@
 
                 double dval = val.double_value (true);
 
-                retval += do_printf_conv (os, encoding (), tfmt.c_str (), nsa,
-                                          sa_1, sa_2, dval, who);
+                retval += do_printf_conv (os, tfmt.c_str (), nsa, sa_1, sa_2,
+                                          dval, who);
               }
             break;
 
@@ -5851,8 +5890,8 @@
                 // Insert "long" modifier.
                 tfmt.replace (tfmt.rfind (type), 1, llmod + type);
 
-                retval += do_printf_conv (os, encoding (), tfmt.c_str (), nsa,
-                                          sa_1, sa_2, tval.value (), who);
+                retval += do_printf_conv (os, tfmt.c_str (), nsa, sa_1, sa_2,
+                                          tval.value (), who);
               }
             else
               {
@@ -5860,8 +5899,8 @@
 
                 double dval = val.double_value (true);
 
-                retval += do_printf_conv (os, encoding (), tfmt.c_str (), nsa,
-                                          sa_1, sa_2, dval, who);
+                retval += do_printf_conv (os, tfmt.c_str (), nsa, sa_1, sa_2,
+                                          dval, who);
               }
             break;
 
@@ -5870,8 +5909,8 @@
             {
               double dval = val.double_value (true);
 
-              retval += do_printf_conv (os, encoding (), tfmt.c_str (), nsa,
-                                        sa_1, sa_2, dval, who);
+              retval += do_printf_conv (os, tfmt.c_str (), nsa, sa_1, sa_2,
+                                        dval, who);
             }
             break;
 
@@ -5903,7 +5942,7 @@
 
     octave_idx_type m_nconv = fmt_list.num_conversions ();
 
-    std::ostream *osp = output_stream ();
+    std::ostream *osp = preferred_output_stream ();
 
     if (! osp)
       invalid_operation (who, "writing");
@@ -5956,18 +5995,12 @@
 
             if (elt->type == '%')
               {
-                if (encoding ().compare ("utf-8"))
-                  os << string::u8_to_encoding (who, "%", encoding ());
-                else
-                  os << '%';
+                os << '%';
                 retval++;
               }
             else if (elt->args == 0 && ! elt->text.empty ())
               {
-                if (encoding ().compare ("utf-8"))
-                  os << string::u8_to_encoding (who, elt->text, encoding ());
-                else
-                  os << elt->text;
+                os << elt->text;
                 retval += (elt->text.length ());
               }
             else if (elt->type == 's' || elt->type == 'c')
@@ -5981,8 +6014,7 @@
                         std::string sval = val.string_value ();
 
                         retval += do_printf_string (os, elt, nsa, sa_1,
-                                                    sa_2, sval, encoding (),
-                                                    who);
+                                                    sa_2, sval, who);
                       }
                     else
                       retval += do_numeric_printf_conv (os, elt, nsa, sa_1,
@@ -6039,7 +6071,7 @@
   {
     int retval = -1;
 
-    std::ostream *osp = output_stream ();
+    std::ostream *osp = preferred_output_stream ();
 
     if (! osp)
       invalid_operation (who, "writing");
@@ -6365,7 +6397,10 @@
   stream::close (void)
   {
     if (stream_ok ())
+    {
+      m_rep->flush ();
       m_rep->close ();
+    }
   }
 
   template <typename SRC_T, typename DST_T>
@@ -6595,9 +6630,6 @@
     // consistent with the order of the elements in the data_type enum in the
     // oct_data_conv class.
 
-    // Expose this in a future version?
-    std::size_t char_count = 0;
-
     std::ptrdiff_t tmp_count = 0;
 
     try
@@ -6660,7 +6692,7 @@
     std::ptrdiff_t input_buf_size
       = static_cast<std::ptrdiff_t> (input_buf_elts) * input_elt_size;
 
-    assert (input_buf_size >= 0);
+    error_if (input_buf_size < 0);
 
     // Must also work and return correct type object for 0 elements to read.
     std::istream *isp = input_stream ();
@@ -6701,7 +6733,6 @@
 
             std::size_t gcount = is.gcount ();
 
-            char_count += gcount;
             cur_pos += gcount;
 
             octave_idx_type nel = gcount / input_elt_size;
--- a/libinterp/corefcn/oct-stream.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/oct-stream.h	Mon Aug 29 13:58:00 2022 +0200
@@ -35,6 +35,8 @@
 #include <memory>
 #include <string>
 
+#include "oct-string.h"
+
 // These only appear as reference arguments or return values.
 
 class Cell;
@@ -73,7 +75,8 @@
                  mach_info::float_format ff = mach_info::native_float_format (),
                  const std::string& encoding = "utf-8")
       : m_mode (arg_md), m_flt_fmt (ff), m_encoding (encoding),
-        m_fail (false), m_open_state (true), m_errmsg ()
+        m_conv_ostream (nullptr), m_fail (false), m_open_state (true),
+        m_errmsg ()
     { }
 
     // No copying!
@@ -115,6 +118,31 @@
 
     virtual std::ostream * output_stream (void) { return nullptr; }
 
+    // Return either the original output stream or one wrapped with the
+    // encoding facet.
+
+    std::ostream * preferred_output_stream (void)
+    {
+      if (! m_encoding.compare ("utf-8"))
+        return output_stream ();
+
+      if (m_conv_ostream)
+        return m_conv_ostream;
+
+      // wrap the output stream with encoding conversion facet
+      std::ostream *os = output_stream ();
+      if (os && *os)
+      {
+        convfacet_u8 *facet = new convfacet_u8 (m_encoding);
+        std::wbuffer_convert<convfacet_u8, char> *converter
+          = new std::wbuffer_convert<convfacet_u8, char> (os->rdbuf (),
+                                                          facet);
+        m_conv_ostream = new std::ostream (converter);
+      }
+
+      return (m_conv_ostream ? m_conv_ostream : output_stream ());
+    }
+
     // Return TRUE if this stream is open.
 
     bool is_open (void) const { return m_open_state; }
@@ -183,6 +211,16 @@
     // Code page
     std::string m_encoding;
 
+    // encoding conversion facet
+    typedef string::deletable_facet<string::codecvt_u8> convfacet_u8;
+
+    std::wbuffer_convert<convfacet_u8, char> *m_converter;
+
+    // wrappers for encoding conversion
+    // std::istream *m_conv_istream;
+
+    std::ostream *m_conv_ostream;
+
     // TRUE if an error has occurred.
     bool m_fail;
 
@@ -415,7 +453,7 @@
 
     std::ostream * output_stream (void)
     {
-      return m_rep ? m_rep->output_stream () : nullptr;
+      return (m_rep ? m_rep->preferred_output_stream () : nullptr);
     }
 
     void clearerr (void) { if (m_rep) m_rep->clearerr (); }
@@ -476,7 +514,8 @@
     lookup (const octave_value& fid, const std::string& who = "") const;
 
     OCTINTERP_API int remove (int fid, const std::string& who = "");
-    OCTINTERP_API int remove (const octave_value& fid, const std::string& who = "");
+    OCTINTERP_API int remove (const octave_value& fid,
+                              const std::string& who = "");
 
     OCTINTERP_API void clear (bool flush = true);
 
--- a/libinterp/corefcn/pager.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/pager.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -127,7 +127,7 @@
   int
   pager_buf::sync (void)
   {
-    output_system& output_sys = __get_output_system__ ("pager_buf::sync");
+    output_system& output_sys = __get_output_system__ ();
 
     char *buf = pbase ();
 
@@ -164,7 +164,7 @@
   int
   diary_buf::sync (void)
   {
-    output_system& output_sys = __get_output_system__ ("__stdout__");
+    output_system& output_sys = __get_output_system__ ();
 
     std::ofstream& external_diary_file = output_sys.external_diary_file ();
 
@@ -259,7 +259,7 @@
 
   void flush_stdout (void)
   {
-    output_system& output_sys = __get_output_system__ ("flush_stdout");
+    output_system& output_sys = __get_output_system__ ();
 
     output_sys.flush_stdout ();
   }
@@ -491,14 +491,14 @@
 
   std::ostream& __stdout__ (void)
   {
-    output_system& output_sys = __get_output_system__ ("__stdout__");
+    output_system& output_sys = __get_output_system__ ();
 
     return output_sys.__stdout__ ();
   }
 
   std::ostream& __diary__ (void)
   {
-    output_system& output_sys = __get_output_system__ ("__diary__");
+    output_system& output_sys = __get_output_system__ ();
 
     return output_sys.__diary__ ();
   }
@@ -623,13 +623,14 @@
 
 DEFUN (terminal_size, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} terminal_size ()
-Query or set the size of the terminal window.  If called with no
-arguments, return a two-element row vector containing the current size
-of the terminal window in characters (rows and columns).  If called with
-a two-element vector of integer values, set the terminal size and return
-the previous setting.  Setting the size manually should not be needed
-when using readline for command-line editing.
+@deftypefn  {} {[@var{rows}, @var{cols}] =} terminal_size ()
+@deftypefnx {} {} terminal_size ([@var{rows}, @var{cols}])
+Query or set the size of the terminal window.  If called with no arguments,
+return a two-element row vector containing the current size of the terminal
+window in characters (rows and columns).  If called with a two-element vector
+of integer values, set the terminal size and return the previous setting.
+Setting the size manually should not be needed when using readline for
+command-line editing.
 @seealso{list_in_columns}
 @end deftypefn */)
 {
@@ -666,7 +667,7 @@
            doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} page_output_immediately ()
 @deftypefnx {} {@var{old_val} =} page_output_immediately (@var{new_val})
-@deftypefnx {} {} page_output_immediately (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} page_output_immediately (@var{new_val}, "local")
 Query or set the internal variable that controls whether Octave sends
 output to the pager as soon as it is available.
 
@@ -690,7 +691,7 @@
            doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} page_screen_output ()
 @deftypefnx {} {@var{old_val} =} page_screen_output (@var{new_val})
-@deftypefnx {} {} page_screen_output (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} page_screen_output (@var{new_val}, "local")
 Query or set the internal variable that controls whether output intended
 for the terminal window that is longer than one page is sent through a
 pager.
@@ -714,7 +715,7 @@
            doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} PAGER ()
 @deftypefnx {} {@var{old_val} =} PAGER (@var{new_val})
-@deftypefnx {} {} PAGER (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} PAGER (@var{new_val}, "local")
 Query or set the internal variable that specifies the program to use
 to display terminal output on your system.
 
@@ -737,7 +738,7 @@
            doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} PAGER_FLAGS ()
 @deftypefnx {} {@var{old_val} =} PAGER_FLAGS (@var{new_val})
-@deftypefnx {} {} PAGER_FLAGS (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} PAGER_FLAGS (@var{new_val}, "local")
 Query or set the internal variable that specifies the options to pass
 to the pager.
 
--- a/libinterp/corefcn/pinv.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/pinv.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -42,9 +42,9 @@
 
 DEFUN (pinv, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} pinv (@var{x})
-@deftypefnx {} {} pinv (@var{x}, @var{tol})
-Return the @nospell{Moore-Penrose} pseudoinverse of @var{x}.
+@deftypefn  {} {@var{B} =} pinv (@var{A})
+@deftypefnx {} {@var{B} =} pinv (@var{A}, @var{tol})
+Return the @nospell{Moore-Penrose} pseudoinverse of @var{A}.
 
 Singular values less than @var{tol} are ignored.
 
@@ -64,6 +64,9 @@
 
   octave_value arg = args(0);
 
+  if (! arg.isnumeric ())
+    err_wrong_type_arg ("pinv", arg);
+
   if (arg.isempty ())
     return ovl (Matrix ());
 
@@ -197,6 +200,12 @@
 %! y = pinv (x, 2);
 %! assert (diag (y), [1/3 1/2 0 0 0]');
 
+## Basic test for integer inputs
+%!assert (pinv (int32 (2)), 0.5)
+%!assert (pinv (uint32 (2)), 0.5)
+%!assert (pinv (int64 (2)), 0.5)
+%!assert (pinv (uint64 (2)), 0.5)
+
 ## Test special case of 0 scalars and vectors
 %!assert (pinv (0), 0)
 %!assert (pinv ([0, 0, 0]), [0; 0; 0])
@@ -206,6 +215,12 @@
 %!assert (pinv (complex ([0,0,0], [0,0,0])), [0; 0; 0])
 %!assert (pinv (complex (single (0),0)), single (0))
 %!assert (pinv (complex (single ([0,0,0]), [0,0,0])), single ([0; 0; 0]))
+
+## Test input validation
+%!error <wrong type argument> pinv ("Hello World")
+%!error <wrong type argument> pinv ({1})
+%!error <wrong type argument> pinv (true)
+
 */
 
 OCTAVE_NAMESPACE_END
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libinterp/corefcn/pow2.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -0,0 +1,325 @@
+////////////////////////////////////////////////////////////////////////
+//
+// Copyright (C) 2022 The Octave Project Developers
+//
+// See the file COPYRIGHT.md in the top-level directory of this
+// distribution or <https://octave.org/copyright/>.
+//
+// This file is part of Octave.
+//
+// Octave is free software: you can redistribute it and/or modify it
+// under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Octave is distributed in the hope that it will be useful, but
+// WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Octave; see the file COPYING.  If not, see
+// <https://www.gnu.org/licenses/>.
+//
+////////////////////////////////////////////////////////////////////////
+
+#if defined (HAVE_CONFIG_H)
+#  include "config.h"
+#endif
+
+#include <cmath>
+
+#include "lo-array-errwarn.h"
+
+#include "defun.h"
+#include "error.h"
+#include "errwarn.h"
+
+// FIXME: According to cppreference.com the implementation of `ldexp (f, e)`
+// might be less efficient that the corresponding `f * exp2 (e)`.  Consider
+// replacing our implementation with the latter.
+
+template <typename T>
+void
+map_2_xldexp (Array<T>& y, const Array<T>& f, const Array<T>& e)
+{
+  if (f.numel () == e.numel () || e.numel () == 1)
+    y = Array<T> (f.dims ());
+  else if (f.numel () == 1)
+    y = Array<T> (e.dims ());
+  else
+    octave::err_nonconformant ("pow2", f.dims (), e.dims ());
+
+  octave_idx_type f_inc = (f.numel () == 1) ? 0 : 1;
+  octave_idx_type e_inc = (e.numel () == 1) ? 0 : 1;
+
+  for (octave_idx_type i = 0; i < y.numel (); i++)
+    y.xelem (i) = std::ldexp (f.xelem (i * f_inc),
+                              static_cast<int> (e.xelem (i * e_inc)));
+}
+
+void
+map_2_xldexp_sparse (SparseMatrix& y, const SparseMatrix& f,
+                                      const SparseMatrix& e)
+{
+  if (e.numel () == 1)
+    {
+      int ee = static_cast<int> (e.data (0));
+      for (octave_idx_type i = 0; i < y.nnz (); i++)
+        y.data (i) = std::ldexp (f.data (i), ee);
+    }
+  else if (f.numel () == e.numel ())
+    {
+      octave_idx_type col = 1;
+      for (octave_idx_type i = 0; i < y.nnz (); i++)
+        {
+          // Determine current column.
+          while (i >= f.cidx (col))
+            col++;
+          int ee = static_cast<int> (e.xelem (f.ridx (i), col - 1));
+          y.data (i) = std::ldexp (f.data (i), ee);
+        }
+    }
+  else
+    octave::err_nonconformant ("pow2", f.dims (), e.dims ());
+}
+
+OCTAVE_NAMESPACE_BEGIN
+
+DEFUN (pow2, args, ,
+       doc: /* -*- texinfo -*-
+@deftypefn  {} {@var{y} =} pow2 (@var{x})
+@deftypefnx {} {@var{y} =} pow2 (@var{f}, @var{e})
+With one input argument, compute
+@tex
+$y = 2^x$
+@end tex
+@ifnottex
+y = 2 .^ x
+@end ifnottex
+for each element of @var{x}.
+
+With two input arguments, return
+@tex
+$y = f \cdot 2^e$,
+@end tex
+@ifnottex
+y = f .* (2 .^ e).
+@end ifnottex
+where for complex inputs only the real part of both inputs is regarded
+and from @var{e} only the real integer part.  This calling form corresponds
+to C/C++ standard function @code{ldexp()}.
+@seealso{log2, nextpow2, power}
+@end deftypefn */)
+{
+  if (args.length () < 1 || args.length () > 2)
+    print_usage ();
+
+  if (! args(0).isfloat ())
+    err_wrong_type_arg ("pow2", args(0));
+
+  // Call exp2(f) where possible for numerical more accurate results.
+  if (args.length () == 1)
+    {
+      if (args(0).iscomplex ())
+        {
+          // The C++ standard does not define exp2 for complex arguments.
+          // Therefore call `2.^x`.
+          octave_value retval = octave::binary_op (octave_value::op_el_pow,
+                                                   2, args(0));
+
+          // Preserve sparse datatype, but even for sparse input fill-up
+          // is unavoidable `2^0 == 1` thus cast only.
+          if (args(0).issparse ())
+            retval = octave_value (retval.sparse_complex_matrix_value ());
+
+          return ovl (retval);
+        }
+      else if (args(0).is_single_type ())
+        {
+          FloatNDArray x = args(0).float_array_value ();
+          FloatNDArray y (x.dims ());
+          for (octave_idx_type i = 0; i < y.numel (); i++)
+            y.xelem (i) = std::exp2 (x.xelem (i));
+          return ovl (y);
+        }
+      else
+        {
+          NDArray x = args(0).array_value ();
+          NDArray y (x.dims ());
+          for (octave_idx_type i = 0; i < y.numel (); i++)
+            y.xelem (i) = std::exp2 (x.xelem (i));
+
+          // Preserve sparse datatype, but even for sparse input fill-up
+          // is unavoidable `2^0 == 1` thus cast only.
+          if (args(0).issparse ())
+            return ovl (SparseMatrix (y));
+          else
+            return ovl (y);
+        }
+    }
+
+  // For Matlab compatibility, the two argument call `y = pow2 (f, e)`
+  // corresponds to std::ldexp() (see bug #61968).  The resulting y is
+  // computed quickly by adding the integer part of e to the floating-point
+  // exponent of f.
+
+  if (! args(1).isfloat ())
+    err_wrong_type_arg ("pow2", args(1));
+
+  if (args(0).iscomplex () || args(1).iscomplex ())
+    warning_with_id ("Octave:pow2:imaginary-ignored",
+                     "pow2: imaginary part is ignored");
+
+  // Note: Matlab R2021a errors on `pow2 (sparse (f), single (e))`,
+  //       but sparsity in f determines output and can significantly
+  //       reduce computation, e.g. `N=1e5; pow2(speye(N),sparse(N,N))`.
+  if (args(0).issparse ())
+    {
+      SparseMatrix f = args(0).sparse_matrix_value ();
+
+      // Special case: return a sparse zero matrix in size of e.
+      if ((f.numel () == 1) && (f.nnz () == 0))
+        return ovl (SparseMatrix (args(1).rows (), args(1).columns ()));
+
+      // Only do sparse computation, if it pays off.  For scalar f fill-up
+      // is unavoidable even for sparse e because `f * 2^0 == f`.  Use dense
+      // code below in this case.
+      if (f.numel () > 1)
+        {
+          SparseMatrix e = args(1).sparse_matrix_value ();
+          SparseMatrix y = SparseMatrix (f);
+          map_2_xldexp_sparse (y, f, e);
+          return ovl (y);
+        }
+    }
+
+  if (args(0).is_single_type () || args(1).is_single_type ())
+    {
+      FloatNDArray f = args(0).float_array_value ();
+      FloatNDArray e = args(1).float_array_value ();
+      FloatNDArray y;
+      map_2_xldexp (y, f, e);
+      return ovl (y);
+    }
+  else
+    {
+      NDArray f = args(0).array_value ();
+      NDArray e = args(1).array_value ();
+      NDArray y;
+      map_2_xldexp (y, f, e);
+
+      // Preserve sparse datatype.
+      // Cases for efficient use of sparsity were treated above already.
+      if (args(0).issparse ())
+        return ovl (SparseMatrix (y));
+      else
+        return ovl (y);
+    }
+}
+
+/*
+## Call `y = pow2 (x)`
+
+%!test
+%! fcns = {@double, @single, @complex};
+%! x = [3, 0, -3];
+%! v = [8, 1, .125];
+%! for i = 1:numel (fcns)
+%!   fcn = fcns{i};
+%!   assert (pow2 (fcn (x)), fcn (v), sqrt (eps));
+%! endfor
+
+%!test
+%! fcns = {@double, @single, @complex, @sparse};
+%! x = [3, 1, -3];
+%! v = [8, 2, .125];
+%! for i = 1:numel (fcns)
+%!   fcn = fcns{i};
+%!   assert (pow2 (fcn (x)), fcn (v), sqrt (eps));
+%! endfor
+
+%!test
+%! fcns = {@double, @single, @complex, @sparse};
+%! x = [1, 1+1i, 1i];
+%! for i = 1:numel (fcns)
+%!   fcn = fcns{i};
+%!   assert (pow2 (fcn (x)), fcn (2) .^ fcn (x), sqrt (eps));
+%! endfor
+
+## Call `y = pow2 (f, e)`
+
+%!test
+%! fcns = {@double, @single, @complex, @sparse};
+%! f = [2 2];
+%! e = [2 2];
+%! z = [8 8];
+%! warning ("off", "Octave:pow2:imaginary-ignored", "local");
+%! for i = 1:numel (fcns)
+%!   fcn = fcns{i};
+%!   assert (pow2 (fcn (f), fcn (e)), real (fcn (z)));
+%! endfor
+
+## Only integer part is taken into account.
+%!test
+%! f = 2;
+%! e = [2, 2.1, 2.2, 2.4, 2.5, 2.8];
+%! z = 8 .* ones (1, length (e));
+%! assert (pow2 (f, e), z);
+
+## Only real part is taken into account.
+%!test
+%! f = [1+1i, 1];
+%! e = 2;
+%! z = [4, 4];
+%! warning ("off", "Octave:pow2:imaginary-ignored", "local");
+%! assert (pow2 (f, e), z);
+
+%!test
+%! f = 1;
+%! e = [1+1i, 1];
+%! z = [2, 2];
+%! warning ("off", "Octave:pow2:imaginary-ignored", "local");
+%! assert (pow2 (f, e), z);
+
+%!test
+%! f = [1/2, pi/4, -3/4, 1/2, 1-eps()/2, 1/2];
+%! e = [1, 2, 2, -51, 1024, -1021];
+%! z = [1, pi, -3, eps(), realmax(), realmin()];
+%! assert (pow2 (f, e), z);
+
+## Tests for sparsity.
+%!assert (pow2 (sparse (0), ones  (3)), sparse (3, 3));
+%!assert (pow2 (sparse (1), ones  (3)), 2 .* sparse (ones (3)));
+%!assert (pow2 (sparse (1), speye (3)), sparse (ones (3) + eye (3)));
+%!assert (pow2 (sparse (3, 3), ones (3)), sparse (3, 3));
+%!assert (pow2 (speye (3), ones (3)), 2 .* speye (3));
+%!assert (pow2 (speye (3), 1),        2 .* speye (3));
+
+%!test
+%! f = speye (3);
+%! e = sparse (3, 3);
+%! e(1,1) = 1;
+%! e(1,3) = 1;
+%! z = f;
+%! z(1,1) = 2;
+%! assert (pow2 (f, e), z);
+
+## Large sparse matrix (only few real elements).
+%!test
+%! ## FIXME: `N = 1e5` would be a better test, but `assert` fills-up somehow.
+%! N = 1e3;
+%! assert (pow2 (speye  (N), sparse (N,N)), speye (N));
+%! assert (pow2 (sparse (0), speye  (N)),   sparse(N,N));
+
+%!error <Invalid call> pow2 ()
+%!error <Invalid call> pow2 (1,2,3)
+%!error <wrong type argument> pow2 (int8 (1))
+%!error <wrong type argument> pow2 (2, int8 (1))
+%!warning <imaginary part is ignored> pow2 (i, 2);
+%!warning <imaginary part is ignored> pow2 (2, i);
+%!error <pow2: nonconformant arguments> pow2 ([1,2], [3,4,5])
+%!error <pow2: nonconformant arguments> pow2 (sparse ([1,2]), sparse ([3,4,5]))
+*/
+
+OCTAVE_NAMESPACE_END
--- a/libinterp/corefcn/pr-flt-fmt.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/pr-flt-fmt.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -54,7 +54,7 @@
        doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} output_precision ()
 @deftypefnx {} {@var{old_val} =} output_precision (@var{new_val})
-@deftypefnx {} {} output_precision (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} output_precision (@var{new_val}, "local")
 Query or set the internal variable that specifies the minimum number of
 significant figures to display for numeric output.
 
--- a/libinterp/corefcn/pr-output.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/pr-output.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -300,7 +300,7 @@
 pr_max_internal (const MArray<T>& m)
 {
   // We expect a 2-d array.
-  assert (m.ndims () == 2);
+  error_unless (m.ndims () == 2);
 
   octave_idx_type nr = m.rows ();
   octave_idx_type nc = m.columns ();
@@ -680,7 +680,7 @@
 static inline float_display_format
 make_matrix_format (const MT& m)
 {
-  assert (m.ndims () == 2);
+  error_unless (m.ndims () == 2);
 
   if (free_format)
     return float_display_format ();
@@ -1570,7 +1570,7 @@
 print_empty_matrix (std::ostream& os, octave_idx_type nr, octave_idx_type nc,
                     bool pr_as_read_syntax)
 {
-  assert (nr == 0 || nc == 0);
+  error_unless (nr == 0 || nc == 0);
 
   if (pr_as_read_syntax)
     {
@@ -1592,7 +1592,7 @@
 print_empty_nd_array (std::ostream& os, const dim_vector& dims,
                       bool pr_as_read_syntax)
 {
-  assert (dims.any_zero ());
+  error_unless (dims.any_zero ());
 
   if (pr_as_read_syntax)
     os << "zeros (" << dims.str (',') << ')';
@@ -2558,7 +2558,8 @@
           octave_idx_type col = 0;
           while (col < num_elem)
             {
-              octave_idx_type lim = (col + inc < num_elem ? col + inc : num_elem);
+              octave_idx_type lim = (col + inc < num_elem ? col + inc
+                                                          : num_elem);
 
               pr_col_num_header (os, total_width, max_width, lim, col,
                                  extra_indent);
@@ -2917,7 +2918,7 @@
 }
 
 #define PRINT_INT_SCALAR_INTERNAL(TYPE)                                 \
-  OCTINTERP_API void                                                    \
+  void                                                                  \
   octave_print_internal (std::ostream& os,                              \
                          const float_display_format& fmt,               \
                          const octave_int<TYPE>& val, bool dummy)       \
@@ -3398,12 +3399,11 @@
 
   std::ostream *osp = os.output_stream ();
 
+  if (! osp)
+    error ("fdisp: stream FID not open for writing");
+
   octave_value arg = args(1);
-
-  if (osp)
-    arg.print (*osp);
-  else
-    error ("fdisp: stream FID not open for writing");
+  arg.print (*osp);
 
   return ovl ();
 }
@@ -3614,7 +3614,15 @@
       std::string arg = argv[idx++];
       std::transform (arg.begin (), arg.end (), arg.begin (), tolower);
 
-      if (arg == "short")
+      if (arg == "default")
+        {
+          format = "short";
+          init_format_state ();
+          set_output_prec (5);
+          Vcompact_format = false;
+          uppercase_format = false;
+        }
+      else if (arg == "short")
         {
           format = arg;
           init_format_state ();
@@ -3806,6 +3814,7 @@
        doc: /* -*- texinfo -*-
 @deftypefn  {} {} format
 @deftypefnx {} {} format options
+@deftypefnx {} {} format (@var{options})
 @deftypefnx {} {[@var{format}, @var{formatspacing}, @var{uppercase}] =} format
 Reset or specify the format of the output produced by @code{disp} and Octave's
 normal echoing mechanism.
@@ -3817,13 +3826,16 @@
 
 By default, Octave displays 5 significant digits in a human readable form
 (option @samp{short}, option @samp{lowercase}, and option @samp{loose} format
-for matrices).  If @code{format} is invoked without any options, this default
-format is restored.
+for matrices).  If @code{format} is invoked without any options, or the option
+@samp{default} is specified, then this default format is restored.
 
 Valid format options for floating point numbers are listed in the following
 table.
 
 @table @code
+@item default
+Restore the default format state described above.
+
 @item short
 Fixed point format with 5 significant figures (default).
 
@@ -3972,10 +3984,12 @@
 @end table
 
 If @code{format} is called with multiple competing options, the rightmost one
-is used.  In case of an error the format remains unchanged.
+is used, except for @samp{default} which will override all other options. In
+case of an error the format remains unchanged.
 
 If called with one to three output arguments, and no inputs, return the current
-format, format spacing, and uppercase preference.
+format, format spacing, and uppercase preference.  Specifying both outputs and
+inputs will produce an error.
 
 @seealso{fixed_point_format, output_precision, split_long_rows,
 print_empty_dimensions, rats}
@@ -4023,7 +4037,7 @@
 %!   assert (str, "3.1415927E+00\n");
 %!   new_fmt = format ();
 %!   assert (new_fmt, "longe");
-%!   ## Test resetting format
+%!   ## Test resetting format (method #1)
 %!   format compact;
 %!   [~, new_spacing] = format ();
 %!   assert (new_spacing, "compact");
@@ -4032,6 +4046,17 @@
 %!   assert (new_fmt, "short");
 %!   assert (new_spacing, "loose");
 %!   assert (new_case, "lowercase");
+%!   ## Test resetting format (method #2)
+%!   format compact uppercase long e;
+%!   [new_fmt, new_spacing, new_case] = format ();
+%!   assert (new_fmt, "longe");
+%!   assert (new_spacing, "compact");
+%!   assert (new_case, "uppercase");
+%!   format ("default");
+%!   [new_fmt, new_spacing, new_case] = format ();
+%!   assert (new_fmt, "short");
+%!   assert (new_spacing, "loose");
+%!   assert (new_case, "lowercase");
 %! unwind_protect_cleanup
 %!   format (old_fmt);
 %!   format (old_spacing);
@@ -4062,7 +4087,7 @@
        doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} fixed_point_format ()
 @deftypefnx {} {@var{old_val} =} fixed_point_format (@var{new_val})
-@deftypefnx {} {} fixed_point_format (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} fixed_point_format (@var{new_val}, "local")
 Query or set the internal variable that controls whether Octave will
 use a scaled format to print matrix values.
 
@@ -4105,7 +4130,7 @@
        doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} print_empty_dimensions ()
 @deftypefnx {} {@var{old_val} =} print_empty_dimensions (@var{new_val})
-@deftypefnx {} {} print_empty_dimensions (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} print_empty_dimensions (@var{new_val}, "local")
 Query or set the internal variable that controls whether the dimensions of
 empty matrices are printed along with the empty matrix symbol, @samp{[]}.
 
@@ -4136,7 +4161,7 @@
        doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} split_long_rows ()
 @deftypefnx {} {@var{old_val} =} split_long_rows (@var{new_val})
-@deftypefnx {} {} split_long_rows (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} split_long_rows (@var{new_val}, "local")
 Query or set the internal variable that controls whether rows of a matrix
 may be split when displayed to a terminal window.
 
--- a/libinterp/corefcn/psi.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/psi.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -39,8 +39,8 @@
 
 DEFUN (psi, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} psi (@var{z})
-@deftypefnx {} {} psi (@var{k}, @var{z})
+@deftypefn  {} {@var{y} =} psi (@var{z})
+@deftypefnx {} {@var{y} =} psi (@var{k}, @var{z})
 Compute the psi (polygamma) function.
 
 The polygamma functions are the @var{k}th derivative of the logarithm
@@ -179,7 +179,8 @@
 ## Interesting identities of the digamma function, in section of 5.1.3
 %!assert (psi (1/3), - em - (3/2) * log (3) - ((sqrt (3) / 6) * pi), eps*10)
 %!assert (psi (1/4), - em -3 * log (2) - pi/2, eps*10)
-%!assert (psi (1/6), - em -2 * log (2) - (3/2) * log (3) - ((sqrt (3) / 2) * pi), eps*10)
+%!assert (psi (1/6),
+%!        - em -2 * log (2) - (3/2) * log (3) - ((sqrt (3) / 2) * pi), eps*10)
 
 ## First 6 zeros of the digamma function, in section of 5.1.5 (and also on
 ## Abramowitz and Stegun, page 258, eq 6.3.19)
--- a/libinterp/corefcn/qr.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/qr.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -116,6 +116,7 @@
 @deftypefnx {} {@var{X} =} qr (@var{A}, @var{B}) # sparse A
 @deftypefnx {} {[@var{C}, @var{R}] =} qr (@var{A}, @var{B})
 @deftypefnx {} {[@dots{}] =} qr (@dots{}, 0)
+@deftypefnx {} {[@dots{}] =} qr (@dots{}, "econ")
 @deftypefnx {} {[@dots{}] =} qr (@dots{}, "vector")
 @deftypefnx {} {[@dots{}] =} qr (@dots{}, "matrix")
 @cindex QR factorization
@@ -270,14 +271,14 @@
 The default, however, is to return a permutation matrix and this may be
 explicitly specified by using a final argument of @qcode{"matrix"}.
 
-If the final argument is the scalar 0 an @qcode{"economy"} factorization is
-returned.  If the original matrix @var{A} has size MxN and M > N, then the
-@qcode{"economy"} factorization will calculate just N rows in @var{R} and N
-columns in @var{Q} and omit the zeros in @var{R}.  If M @leq{} N, there is no
-difference between the economy and standard factorizations.  When calculating
-an @qcode{"economy"} factorization and @var{A} is dense, the output @var{P} is
-always a vector rather than a matrix.  If @var{A} is sparse, output
-@var{P} is a sparse permutation matrix.
+If the final argument is the scalar 0 or the string @qcode{"econ"}, an
+economy factorization is returned.  If the original matrix @var{A} has size
+MxN and M > N, then the economy factorization will calculate just N rows in
+@var{R} and N columns in @var{Q} and omit the zeros in @var{R}.  If M @leq{}
+N, there is no difference between the economy and standard factorizations.
+When calculating an economy factorization and @var{A} is dense, the output
+@var{P} is always a vector rather than a matrix.  If @var{A} is sparse,
+output @var{P} is a sparse permutation matrix.
 
 Background: The QR factorization has applications in the solution of least
 squares problems
@@ -344,9 +345,14 @@
           std::string str = args(nargin-1).string_value ();
           if (str == "vector")
             vector_p = true;
+          else if (str == "econ")
+            {
+              economy = true;
+              have_b = (nargin > 2);
+            }
           else if (str != "matrix")
-            error ("qr: type for P must be 'matrix' or 'vector', not %s",
-                   str.c_str ());
+            error ("qr: option string must be 'econ' or 'matrix' or " \
+                   "'vector', not \"%s\"", str.c_str ());
           have_b = (nargin > 2);
         }
       else if (! args(nargin-1).is_matrix_type ())
@@ -704,45 +710,55 @@
 %!
 %! [q, r] = qr (a);
 %! [qe, re] = qr (a, 0);
+%! [qe2, re2] = qr (a, "econ");
 %!
 %! assert (q * r, a, sqrt (eps));
 %! assert (qe * re, a, sqrt (eps));
+%! assert (qe2 * re2, a, sqrt (eps));
 
 %!test
 %! a = [0, 2, 1; 2, 1, 2];
 %!
 %! [q, r] = qr (a);
 %! [qe, re] = qr (a, 0);
+%! [qe2, re2] = qr (a, "econ");
 %!
 %! assert (q * r, a, sqrt (eps));
 %! assert (qe * re, a, sqrt (eps));
+%! assert (qe2 * re2, a, sqrt (eps));
 
 %!test
 %! a = [0, 2, 1; 2, 1, 2];
 %!
 %! [q, r, p] = qr (a);  # FIXME: not giving right dimensions.
 %! [qe, re, pe] = qr (a, 0);
+%! [qe2, re2, pe2] = qr (a, "econ");
 %!
 %! assert (q * r, a * p, sqrt (eps));
 %! assert (qe * re, a(:, pe), sqrt (eps));
+%! assert (qe2 * re2, a(:, pe2), sqrt (eps));
 
 %!test
 %! a = [0, 2; 2, 1; 1, 2];
 %!
 %! [q, r] = qr (a);
 %! [qe, re] = qr (a, 0);
+%! [qe2, re2] = qr (a, "econ");
 %!
 %! assert (q * r, a, sqrt (eps));
 %! assert (qe * re, a, sqrt (eps));
+%! assert (qe2 * re2, a, sqrt (eps));
 
 %!test
 %! a = [0, 2; 2, 1; 1, 2];
 %!
 %! [q, r, p] = qr (a);
 %! [qe, re, pe] = qr (a, 0);
+%! [qe2, re2, pe2] = qr (a, "econ");
 %!
 %! assert (q * r, a * p, sqrt (eps));
 %! assert (qe * re, a(:, pe), sqrt (eps));
+%! assert (qe2 * re2, a(:, pe2), sqrt (eps));
 
 %!test
 %! a = [0, 2, 1; 2, 1, 2; 3, 1, 2];
@@ -791,6 +807,8 @@
 
 %!error qr ()
 %!error qr ([1, 2; 3, 4], 0, 2)
+%!error <option string must be .*, not "foo"> qr (magic (3), "foo")
+%!error <option string must be .*, not "foo"> qr (magic (3), rand (3, 1), "foo")
 %!error <too many output arguments for dense A with B>
 %! [q, r, p] = qr (rand (3, 2), rand (3, 1));
 %!error <too many output arguments for dense A with B>
@@ -1417,14 +1435,16 @@
 %! [Q,R] = qrupdate (Q, R, single (u), single (v));
 %! assert (norm (vec (Q'*Q - eye (5,"single")), Inf) < 1e1*eps ("single"));
 %! assert (norm (vec (triu (R)-R), Inf) == 0);
-%! assert (norm (vec (Q*R - single (A) - single (u)*single (v)'), Inf) < norm (single (A))*1e1*eps ("single"));
+%! assert (norm (vec (Q*R - single (A) - single (u)*single (v)'), Inf)
+%!         < norm (single (A))*1e1*eps ("single"));
 %!
 %!test
 %! [Q,R] = qr (single (Ac));
 %! [Q,R] = qrupdate (Q, R, single (uc), single (vc));
 %! assert (norm (vec (Q'*Q - eye (5,"single")), Inf) < 1e1*eps ("single"));
 %! assert (norm (vec (triu (R)-R), Inf) == 0);
-%! assert (norm (vec (Q*R - single (Ac) - single (uc)*single (vc)'), Inf) < norm (single (Ac))*1e1*eps ("single"));
+%! assert (norm (vec (Q*R - single (Ac) - single (uc)*single (vc)'), Inf)
+%!         < norm (single (Ac))*1e1*eps ("single"));
 */
 
 DEFUN (qrinsert, args, ,
@@ -1599,13 +1619,15 @@
 %! [Q,R] = qrinsert (Q, R, 3, single (u));
 %! assert (norm (vec (Q'*Q - eye (5,"single")), Inf) < 1e1*eps ("single"));
 %! assert (norm (vec (triu (R) - R), Inf) == 0);
-%! assert (norm (vec (Q*R - single ([A(:,1:2) u A(:,3)])), Inf) < norm (single (A))*1e1*eps ("single"));
+%! assert (norm (vec (Q*R - single ([A(:,1:2) u A(:,3)])), Inf)
+%!         < norm (single (A))*1e1*eps ("single"));
 %!test
 %! [Q,R] = qr (single (Ac));
 %! [Q,R] = qrinsert (Q, R, 3, single (uc));
 %! assert (norm (vec (Q'*Q - eye (5,"single")), Inf) < 1e1*eps ("single"));
 %! assert (norm (vec (triu (R) - R), Inf) == 0);
-%! assert (norm (vec (Q*R - single ([Ac(:,1:2) uc Ac(:,3)])), Inf) < norm (single (Ac))*1e1*eps ("single"));
+%! assert (norm (vec (Q*R - single ([Ac(:,1:2) uc Ac(:,3)])), Inf)
+%!         < norm (single (Ac))*1e1*eps ("single"));
 %!test
 %! x = single ([0.85082  0.76426  0.42883 ]);
 %!
@@ -1613,7 +1635,8 @@
 %! [Q,R] = qrinsert (Q, R, 3, x, "row");
 %! assert (norm (vec (Q'*Q - eye (6,"single")), Inf) < 1e1*eps ("single"));
 %! assert (norm (vec (triu (R) - R), Inf) == 0);
-%! assert (norm (vec (Q*R - single ([A(1:2,:);x;A(3:5,:)])), Inf) < norm (single (A))*1e1*eps ("single"));
+%! assert (norm (vec (Q*R - single ([A(1:2,:);x;A(3:5,:)])), Inf)
+%!         < norm (single (A))*1e1*eps ("single"));
 %!test
 %! x = single ([0.20351 + 0.05401i  0.13141 + 0.43708i  0.29808 + 0.08789i ]);
 %!
@@ -1621,7 +1644,8 @@
 %! [Q,R] = qrinsert (Q, R, 3, x, "row");
 %! assert (norm (vec (Q'*Q - eye (6,"single")), Inf) < 1e1*eps ("single"));
 %! assert (norm (vec (triu (R) - R), Inf) == 0);
-%! assert (norm (vec (Q*R - single ([Ac(1:2,:);x;Ac(3:5,:)])), Inf) < norm (single (Ac))*1e1*eps ("single"));
+%! assert (norm (vec (Q*R - single ([Ac(1:2,:);x;Ac(3:5,:)])), Inf)
+%!         < norm (single (Ac))*1e1*eps ("single"));
 */
 
 DEFUN (qrdelete, args, ,
@@ -1815,7 +1839,8 @@
 %! [Q,R] = qrdelete (Q, R, 3);
 %! assert (norm (vec (Q'*Q - eye (5,"single")), Inf) < 1e1*eps ("single"));
 %! assert (norm (vec (triu (R) - R), Inf) == 0);
-%! assert (norm (vec (Q*R - [AA(:,1:2) AA(:,4)]), Inf) < norm (AA)*1e1*eps ("single"));
+%! assert (norm (vec (Q*R - [AA(:,1:2) AA(:,4)]), Inf)
+%!         < norm (AA)*1e1*eps ("single"));
 %!
 %!test
 %! AA = single ([0.364554 + 0.993117i  0.669818 + 0.510234i  0.426568 + 0.041337i  0.847051 + 0.233291i;
@@ -1828,8 +1853,9 @@
 %! [Q,R] = qrdelete (Q, R, 3);
 %! assert (norm (vec (Q'*Q - eye (5,"single")), Inf) < 1e1*eps ("single"));
 %! assert (norm (vec (triu (R) - R), Inf) == 0);
-%! assert (norm (vec (Q*R - [AA(:,1:2) AA(:,4)]), Inf) < norm (AA)*1e1*eps ("single"));
-%!
+%! assert (norm (vec (Q*R - [AA(:,1:2) AA(:,4)]), Inf)
+%!         < norm (AA)*1e1*eps ("single"));
+
 %!test
 %! AA = single ([0.091364  0.613038  0.027504  0.999083;
 %!               0.594638  0.425302  0.562834  0.603537;
@@ -1841,7 +1867,8 @@
 %! [Q,R] = qrdelete (Q, R, 3, "row");
 %! assert (norm (vec (Q'*Q - eye (4,"single")), Inf) < 1.5e1*eps ("single"));
 %! assert (norm (vec (triu (R) - R), Inf) == 0);
-%! assert (norm (vec (Q*R - [AA(1:2,:);AA(4:5,:)]), Inf) < norm (AA)*1e1*eps ("single"));
+%! assert (norm (vec (Q*R - [AA(1:2,:);AA(4:5,:)]), Inf)
+%!         < norm (AA)*1e1*eps ("single"));
 %!testif HAVE_QRUPDATE
 %! ## Same test as above but with more precicision
 %! AA = single ([0.091364  0.613038  0.027504  0.999083;
@@ -1854,7 +1881,8 @@
 %! [Q,R] = qrdelete (Q, R, 3, "row");
 %! assert (norm (vec (Q'*Q - eye (4,"single")), Inf) < 1e1*eps ("single"));
 %! assert (norm (vec (triu (R) - R), Inf) == 0);
-%! assert (norm (vec (Q*R - [AA(1:2,:);AA(4:5,:)]), Inf) < norm (AA)*1e1*eps ("single"));
+%! assert (norm (vec (Q*R - [AA(1:2,:);AA(4:5,:)]), Inf)
+%!         < norm (AA)*1e1*eps ("single"));
 %!
 %!test
 %! AA = single ([0.364554 + 0.993117i  0.669818 + 0.510234i  0.426568 + 0.041337i  0.847051 + 0.233291i;
@@ -1867,7 +1895,8 @@
 %! [Q,R] = qrdelete (Q, R, 3, "row");
 %! assert (norm (vec (Q'*Q - eye (4,"single")), Inf) < 1e1*eps ("single"));
 %! assert (norm (vec (triu (R) - R), Inf) == 0);
-%! assert (norm (vec (Q*R - [AA(1:2,:);AA(4:5,:)]), Inf) < norm (AA)*1e1*eps ("single"));
+%! assert (norm (vec (Q*R - [AA(1:2,:);AA(4:5,:)]), Inf)
+%!         < norm (AA)*1e1*eps ("single"));
 */
 
 DEFUN (qrshift, args, ,
--- a/libinterp/corefcn/quad.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/quad.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -134,7 +134,7 @@
 @deftypefn  {} {@var{q} =} quad (@var{f}, @var{a}, @var{b})
 @deftypefnx {} {@var{q} =} quad (@var{f}, @var{a}, @var{b}, @var{tol})
 @deftypefnx {} {@var{q} =} quad (@var{f}, @var{a}, @var{b}, @var{tol}, @var{sing})
-@deftypefnx {} {[@var{q}, @var{ier}, @var{nfun}, @var{err}] =} quad (@dots{})
+@deftypefnx {} {[@var{q}, @var{ier}, @var{nfev}, @var{err}] =} quad (@dots{})
 Numerically evaluate the integral of @var{f} from @var{a} to @var{b} using
 Fortran routines from @w{@sc{quadpack}}.
 
@@ -161,7 +161,7 @@
 @var{ier} contains an integer error code (0 indicates a successful
 integration).
 
-@var{nfun} indicates the number of function evaluations that were
+@var{nfev} indicates the number of function evaluations that were
 made.
 
 @var{err} contains an estimate of the error in the solution.
@@ -220,7 +220,7 @@
         }
 
       octave_idx_type ier = 0;
-      octave_idx_type nfun = 0;
+      octave_idx_type nfev = 0;
       float abserr = 0.0;
       float val = 0.0;
       bool have_sing = false;
@@ -262,7 +262,7 @@
               FloatIndefQuad iq (quad_float_user_function, bound,
                                  indef_type);
               iq.set_options (quad_opts);
-              val = iq.float_integrate (ier, nfun, abserr);
+              val = iq.float_integrate (ier, nfev, abserr);
             }
           else
             {
@@ -270,13 +270,13 @@
                 {
                   FloatDefQuad dq (quad_float_user_function, a, b, sing);
                   dq.set_options (quad_opts);
-                  val = dq.float_integrate (ier, nfun, abserr);
+                  val = dq.float_integrate (ier, nfev, abserr);
                 }
               else
                 {
                   FloatDefQuad dq (quad_float_user_function, a, b);
                   dq.set_options (quad_opts);
-                  val = dq.float_integrate (ier, nfun, abserr);
+                  val = dq.float_integrate (ier, nfev, abserr);
                 }
             }
           break;
@@ -286,7 +286,7 @@
           break;
         }
 
-      retval = ovl (val, ier, nfun, abserr);
+      retval = ovl (val, ier, nfev, abserr);
 
     }
   else
@@ -316,7 +316,7 @@
         }
 
       octave_idx_type ier = 0;
-      octave_idx_type nfun = 0;
+      octave_idx_type nfev = 0;
       double abserr = 0.0;
       double val = 0.0;
       bool have_sing = false;
@@ -357,7 +357,7 @@
             {
               IndefQuad iq (quad_user_function, bound, indef_type);
               iq.set_options (quad_opts);
-              val = iq.integrate (ier, nfun, abserr);
+              val = iq.integrate (ier, nfev, abserr);
             }
           else
             {
@@ -365,13 +365,13 @@
                 {
                   DefQuad dq (quad_user_function, a, b, sing);
                   dq.set_options (quad_opts);
-                  val = dq.integrate (ier, nfun, abserr);
+                  val = dq.integrate (ier, nfev, abserr);
                 }
               else
                 {
                   DefQuad dq (quad_user_function, a, b);
                   dq.set_options (quad_opts);
-                  val = dq.integrate (ier, nfun, abserr);
+                  val = dq.integrate (ier, nfev, abserr);
                 }
             }
           break;
@@ -381,7 +381,7 @@
           break;
         }
 
-      retval = ovl (val, ier, nfun, abserr);
+      retval = ovl (val, ier, nfev, abserr);
     }
 
   return retval;
@@ -393,17 +393,17 @@
 %!endfunction
 
 %!test
-%! [v, ier, nfun, err] = quad ("__f", 0, 5);
+%! [v, ier, nfev, err] = quad ("__f", 0, 5);
 %! assert (ier, 0);
 %! assert (v, 17.5, sqrt (eps));
-%! assert (nfun > 0);
+%! assert (nfev > 0);
 %! assert (err < sqrt (eps));
 
 %!test
-%! [v, ier, nfun, err] = quad ("__f", single (0), single (5));
+%! [v, ier, nfev, err] = quad ("__f", single (0), single (5));
 %! assert (ier, 0);
 %! assert (v, 17.5, sqrt (eps ("single")));
-%! assert (nfun > 0);
+%! assert (nfev > 0);
 %! assert (err < sqrt (eps ("single")));
 
 %!function y = __f (x)
@@ -411,43 +411,43 @@
 %!endfunction
 
 %!test
-%!  [v, ier, nfun, err] = quad ("__f", 0.001, 3);
+%!  [v, ier, nfev, err] = quad ("__f", 0.001, 3);
 %! assert (ier == 0 || ier == 1);
 %! assert (v, 1.98194120273598, sqrt (eps));
-%! assert (nfun > 0);
+%! assert (nfev > 0);
 
 %!test
-%!  [v, ier, nfun, err] = quad (@__f, 0.001, 3);
+%!  [v, ier, nfev, err] = quad (@__f, 0.001, 3);
 %! assert (ier == 0 || ier == 1);
 %! assert (v, 1.98194120273598, sqrt (eps));
-%! assert (nfun > 0);
+%! assert (nfev > 0);
 
 %!test
 %!  fstr = "x .* sin (1 ./ x) .* sqrt (abs (1 - x))";
-%!  [v, ier, nfun, err] = quad (fstr, 0.001, 3);
+%!  [v, ier, nfev, err] = quad (fstr, 0.001, 3);
 %! assert (ier == 0 || ier == 1);
 %! assert (v, 1.98194120273598, sqrt (eps));
-%! assert (nfun > 0);
+%! assert (nfev > 0);
 
 %!test
 %!  anon_fcn = @(x) x .* sin (1 ./ x) .* sqrt (abs (1 - x));
-%!  [v, ier, nfun, err] = quad (anon_fcn, 0.001, 3);
+%!  [v, ier, nfev, err] = quad (anon_fcn, 0.001, 3);
 %! assert (ier == 0 || ier == 1);
 %! assert (v, 1.98194120273598, sqrt (eps));
-%! assert (nfun > 0);
+%! assert (nfev > 0);
 
 %!test
 %!  inline_fcn = inline ("x .* sin (1 ./ x) .* sqrt (abs (1 - x))", "x");
-%!  [v, ier, nfun, err] = quad (inline_fcn, 0.001, 3);
+%!  [v, ier, nfev, err] = quad (inline_fcn, 0.001, 3);
 %! assert (ier == 0 || ier == 1);
 %! assert (v, 1.98194120273598, sqrt (eps));
-%! assert (nfun > 0);
+%! assert (nfev > 0);
 
 %!test
-%!  [v, ier, nfun, err] = quad ("__f", single (0.001), single (3));
+%!  [v, ier, nfev, err] = quad ("__f", single (0.001), single (3));
 %! assert (ier == 0 || ier == 1);
 %! assert (v, 1.98194120273598, sqrt (eps ("single")));
-%! assert (nfun > 0);
+%! assert (nfev > 0);
 
 %!error quad ()
 %!error quad ("__f", 1, 2, 3, 4, 5)
--- a/libinterp/corefcn/quadcc.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/quadcc.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -1488,7 +1488,7 @@
 
 // The actual integration routine.
 
-DEFMETHOD (quadcc, interp, args, ,
+DEFMETHOD (quadcc, interp, args, nargout,
            doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{q} =} quadcc (@var{f}, @var{a}, @var{b})
 @deftypefnx {} {@var{q} =} quadcc (@var{f}, @var{a}, @var{b}, @var{tol})
@@ -1537,8 +1537,11 @@
 @var{nr_points} is the number of points at which the integrand was evaluated.
 
 If the adaptive integration did not converge, the value of @var{err} will be
-larger than the requested tolerance.  Therefore, it is recommended to verify
-this value for difficult integrands.
+larger than the requested tolerance.  If only a single output is requested then
+a warning will be emitted when the requested tolerance is not met.  If the
+second output @var{err} is requested then no warning is issued and it is the
+responsibility of the programmer to inspect and determine whether the results
+are satisfactory.
 
 @code{quadcc} is capable of dealing with non-numeric values of the integrand
 such as @code{NaN} or @code{Inf}.  If the integral diverges, and @code{quadcc}
@@ -2205,6 +2208,9 @@
     }
 #endif
 
+ if (nargout < 2 && err > std::max (abstol, reltol * std::abs (igral)))
+    warning ("quadcc: Error tolerance not met.  Estimated error: %g\n", err);
+
   if (issingle)
     return ovl (static_cast<float> (igral), err, neval);
   else
@@ -2213,14 +2219,16 @@
 
 /*
 %!assert (quadcc (@sin, -pi, pi), 0, 1e-10)
-%!assert (quadcc (inline ("sin"), -pi, pi), 0, 1e-10)
+%!test
+%! warning ("off", "Octave:legacy-function", "local");
+%! assert (quadcc (inline ("sin"), -pi, pi), 0, 1e-10);
 %!assert (quadcc ("sin", -pi, pi), 0, 1e-10)
 
 %!assert (quadcc (@sin, -pi, 0), -2, 1e-10)
 %!assert (quadcc (@sin, 0, pi), 2, 1e-10)
 %!assert (quadcc (@(x) 1./sqrt (x), 0, 1), 2, -1e-6)
 %!assert (quadcc (@(x) 1./(sqrt (x).*(x+1)), 0, Inf), pi, -1e-6)
-%!assert (quadcc (@(x) 1./(sqrt (x).*(x+1)), 0, Inf, [0, 1e-8]), pi, -1e-8)
+%!assert (quadcc (@(x) 1./(sqrt (x).*(x+1)), 0, Inf, [0, 2e-7]), pi, -2e-7)
 
 %!assert (quadcc (@(x) exp (-x .^ 2), -Inf, Inf), sqrt (pi), 1e-10)
 %!assert (quadcc (@(x) exp (-x .^ 2), -Inf, 0), sqrt (pi)/2, 1e-10)
@@ -2244,6 +2252,12 @@
 %! assert (class (quadcc (@sin, 0, single (1))), "single");
 %! assert (class (quadcc (@sin, single (0), single (1))), "single");
 
+%!test <*62412>
+%! f = @(t) -1 ./ t.^1.1;
+%! fail ("quadcc (f, 1, Inf)", "warning", "Error tolerance not met");
+%! [q, err] = quadcc (f, 1, Inf);
+%! assert (err > 1e-5);
+
 ## Test input validation
 %!error quadcc ()
 %!error quadcc (@sin)
--- a/libinterp/corefcn/rand.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/rand.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -357,17 +357,17 @@
 
 DEFUN (rand, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} rand (@var{n})
-@deftypefnx {} {} rand (@var{m}, @var{n}, @dots{})
-@deftypefnx {} {} rand ([@var{m} @var{n} @dots{}])
+@deftypefn  {} {@var{x} =} rand (@var{n})
+@deftypefnx {} {@var{x} =} rand (@var{m}, @var{n}, @dots{})
+@deftypefnx {} {@var{x} =} rand ([@var{m} @var{n} @dots{}])
+@deftypefnx {} {@var{x} =} rand (@dots{}, "single")
+@deftypefnx {} {@var{x} =} rand (@dots{}, "double")
 @deftypefnx {} {@var{v} =} rand ("state")
 @deftypefnx {} {} rand ("state", @var{v})
 @deftypefnx {} {} rand ("state", "reset")
 @deftypefnx {} {@var{v} =} rand ("seed")
 @deftypefnx {} {} rand ("seed", @var{v})
 @deftypefnx {} {} rand ("seed", "reset")
-@deftypefnx {} {} rand (@dots{}, "single")
-@deftypefnx {} {} rand (@dots{}, "double")
 Return a matrix with random elements uniformly distributed on the
 interval (0, 1).
 
@@ -550,17 +550,17 @@
 
 DEFUN (randn, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} randn (@var{n})
-@deftypefnx {} {} randn (@var{m}, @var{n}, @dots{})
-@deftypefnx {} {} randn ([@var{m} @var{n} @dots{}])
+@deftypefn  {} {@var{x} =} randn (@var{n})
+@deftypefnx {} {@var{x} =} randn (@var{m}, @var{n}, @dots{})
+@deftypefnx {} {@var{x} =} randn ([@var{m} @var{n} @dots{}])
+@deftypefnx {} {@var{x} =} randn (@dots{}, "single")
+@deftypefnx {} {@var{x} =} randn (@dots{}, "double")
 @deftypefnx {} {@var{v} =} randn ("state")
 @deftypefnx {} {} randn ("state", @var{v})
 @deftypefnx {} {} randn ("state", "reset")
 @deftypefnx {} {@var{v} =} randn ("seed")
 @deftypefnx {} {} randn ("seed", @var{v})
 @deftypefnx {} {} randn ("seed", "reset")
-@deftypefnx {} {} randn (@dots{}, "single")
-@deftypefnx {} {} randn (@dots{}, "double")
 Return a matrix with normally distributed random elements having zero mean
 and variance one.
 
@@ -617,17 +617,17 @@
 
 DEFUN (rande, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} rande (@var{n})
-@deftypefnx {} {} rande (@var{m}, @var{n}, @dots{})
-@deftypefnx {} {} rande ([@var{m} @var{n} @dots{}])
+@deftypefn  {} {@var{x} =} rande (@var{n})
+@deftypefnx {} {@var{x} =} rande (@var{m}, @var{n}, @dots{})
+@deftypefnx {} {@var{x} =} rande ([@var{m} @var{n} @dots{}])
+@deftypefnx {} {@var{x} =} rande (@dots{}, "single")
+@deftypefnx {} {@var{x} =} rande (@dots{}, "double")
 @deftypefnx {} {@var{v} =} rande ("state")
 @deftypefnx {} {} rande ("state", @var{v})
 @deftypefnx {} {} rande ("state", "reset")
 @deftypefnx {} {@var{v} =} rande ("seed")
 @deftypefnx {} {} rande ("seed", @var{v})
 @deftypefnx {} {} rande ("seed", "reset")
-@deftypefnx {} {} rande (@dots{}, "single")
-@deftypefnx {} {} rande (@dots{}, "double")
 Return a matrix with exponentially distributed random elements.
 
 The arguments are handled the same as the arguments for @code{rand}.
@@ -686,17 +686,17 @@
 
 DEFUN (randg, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} randg (@var{a}, @var{n})
-@deftypefnx {} {} randg (@var{a}, @var{m}, @var{n}, @dots{})
-@deftypefnx {} {} randg (@var{a}, [@var{m} @var{n} @dots{}])
+@deftypefn  {} {@var{x} =} randg (@var{a}, @var{n})
+@deftypefnx {} {@var{x} =} randg (@var{a}, @var{m}, @var{n}, @dots{})
+@deftypefnx {} {@var{x} =} randg (@var{a}, [@var{m} @var{n} @dots{}])
+@deftypefnx {} {@var{x} =} randg (@dots{}, "single")
+@deftypefnx {} {@var{x} =} randg (@dots{}, "double")
 @deftypefnx {} {@var{v} =} randg ("state")
 @deftypefnx {} {} randg ("state", @var{v})
 @deftypefnx {} {} randg ("state", "reset")
 @deftypefnx {} {@var{v} =} randg ("seed")
 @deftypefnx {} {} randg ("seed", @var{v})
 @deftypefnx {} {} randg ("seed", "reset")
-@deftypefnx {} {} randg (@dots{}, "single")
-@deftypefnx {} {} randg (@dots{}, "double")
 
 Return a matrix with @code{gamma (@var{a},1)} distributed random elements.
 
@@ -796,7 +796,7 @@
 /*
 %!test
 %! randg ("state", 12);
-%! assert (randg ([-inf, -1, 0, inf, nan]), [nan, nan, nan, nan, nan]); # *** Please report
+%! assert (randg ([-inf, -1, 0, inf, nan]), [nan, nan, nan, nan, nan]);
 
 %!test
 %! ## Test a known fixed state
@@ -901,7 +901,7 @@
 %! endif
 %!test
 %! randg ("seed", 12);
-%!assert (randg ([-inf, -1, 0, inf, nan]), [nan, nan, nan, nan, nan]) # *** Please report
+%! assert (randg ([-inf, -1, 0, inf, nan]), [nan, nan, nan, nan, nan]);
 %!test
 %! if (__random_statistical_tests__)
 %!   ## statistical tests may fail occasionally.
@@ -961,17 +961,17 @@
 
 DEFUN (randp, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} randp (@var{l}, @var{n})
-@deftypefnx {} {} randp (@var{l}, @var{m}, @var{n}, @dots{})
-@deftypefnx {} {} randp (@var{l}, [@var{m} @var{n} @dots{}])
+@deftypefn  {} {@var{x} =} randp (@var{l}, @var{n})
+@deftypefnx {} {@var{x} =} randp (@var{l}, @var{m}, @var{n}, @dots{})
+@deftypefnx {} {@var{x} =} randp (@var{l}, [@var{m} @var{n} @dots{}])
+@deftypefnx {} {@var{x} =} randp (@dots{}, "single")
+@deftypefnx {} {@var{x} =} randp (@dots{}, "double")
 @deftypefnx {} {@var{v} =} randp ("state")
 @deftypefnx {} {} randp ("state", @var{v})
 @deftypefnx {} {} randp ("state", "reset")
 @deftypefnx {} {@var{v} =} randp ("seed")
 @deftypefnx {} {} randp ("seed", @var{v})
 @deftypefnx {} {} randp ("seed", "reset")
-@deftypefnx {} {} randp (@dots{}, "single")
-@deftypefnx {} {} randp (@dots{}, "double")
 Return a matrix with Poisson distributed random elements with mean value
 parameter given by the first argument, @var{l}.
 
@@ -1021,7 +1021,7 @@
 /*
 %!test
 %! randp ("state", 12);
-%! assert (randp ([-inf, -1, 0, inf, nan]), [nan, nan, 0, nan, nan]);   # *** Please report
+%! assert (randp ([-inf, -1, 0, inf, nan]), [nan, nan, 0, nan, nan]);
 %!test
 %! ## Test a known fixed state
 %! randp ("state", 1);
@@ -1033,7 +1033,9 @@
 %!test
 %! ## Test a known fixed state
 %! randp ("state", 1);
-%! assert (randp (1e9, 1, 6), [999915677 999976657 1000047684 1000019035 999985749 999977692], -1e-6);
+%! assert (randp (1e9, 1, 6),
+%!         [999915677 999976657 1000047684 1000019035 999985749 999977692],
+%!         -1e-6);
 %!test
 %! ## Test a known fixed seed
 %! randp ("seed", 1);
@@ -1046,7 +1048,9 @@
 %!test
 %! ## Test a known fixed seed
 %! randp ("seed", 1);
-%! assert (randp (1e9, 1, 6), [1000006208 1000012224 999981120 999963520 999963072 999981440], -1e-6);
+%! assert (randp (1e9, 1, 6),
+%!         [1000006208 1000012224 999981120 999963520 999963072 999981440],
+%!         -1e-6);
 %!test
 %! if (__random_statistical_tests__)
 %!   ## statistical tests may fail occasionally.
@@ -1075,7 +1079,7 @@
 %! endif
 %!test
 %! randp ("seed", 12);
-%! assert (randp ([-inf, -1, 0, inf, nan]), [nan, nan, 0, nan, nan]);   # *** Please report
+%! assert (randp ([-inf, -1, 0, inf, nan]), [nan, nan, 0, nan, nan]);
 %!test
 %! if (__random_statistical_tests__)
 %!   ## statistical tests may fail occasionally.
@@ -1106,8 +1110,8 @@
 
 DEFUN (randperm, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} randperm (@var{n})
-@deftypefnx {} {} randperm (@var{n}, @var{m})
+@deftypefn  {} {@var{v} =} randperm (@var{n})
+@deftypefnx {} {@var{v} =} randperm (@var{n}, @var{m})
 Return a row vector containing a random permutation of @code{1:@var{n}}.
 
 If @var{m} is supplied, return @var{m} unique entries, sampled without
--- a/libinterp/corefcn/regexp.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/regexp.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -1128,8 +1128,10 @@
 %! assert (isempty (fieldnames (nm)));
 %! assert (sp, { "", "", "A", "", "E", "" });
 
-%!assert (regexp ({'asdfg-dfd';'-dfd-dfd-';'qasfdfdaq'}, '-'), {6;[1,5,9];zeros(1,0)})
-%!assert (regexp ({'asdfg-dfd';'-dfd-dfd-';'qasfdfdaq'}, {'-';'f';'q'}), {6;[3,7];[1,9]})
+%!assert (regexp ({'asdfg-dfd';'-dfd-dfd-';'qasfdfdaq'}, '-'),
+%!        {6;[1,5,9];zeros(1,0)})
+%!assert (regexp ({'asdfg-dfd';'-dfd-dfd-';'qasfdfdaq'}, {'-';'f';'q'}),
+%!        {6;[3,7];[1,9]})
 %!assert (regexp ('Strings', {'t','s'}), {2, 7})
 
 ## Test case for lookaround operators
@@ -1198,6 +1200,12 @@
 %! assert (regexp ('foo!+bar\nbar!+foo', '.\>'), [3, 4, 8, 13, 14, 18]);
 %! assert (regexp ('foo!+bar\nbar!+foo', '\<\w'), [1, 6, 10, 16]);
 
+## Test "incomplete" named patterns
+%!assert <*62705> (regexpi ('<', '\(?<'), 1)
+%!assert <*62705> (regexpi ('<n>', '\(?<n\>'), 1)
+%!assert <*62705> (regexpi ('<n>', '\(?<n\>\)?'), 1)
+%!assert <62705> (regexpi ('<n>a', '\(?<n\>a\)?'), 1)
+
 ## Test input validation
 %!error regexp ('string', 'tri', 'BadArg')
 %!error regexp ('string')
@@ -1352,9 +1360,12 @@
 %!error regexpi ('string', 'tri', 'BadArg')
 %!error regexpi ('string')
 
-%!assert (regexpi ({'asdfg-dfd';'-dfd-dfd-';'qasfdfdaq'}, '-'), {6;[1,5,9];zeros(1, 0)})
-%!assert (regexpi ({'asdfg-dfd', '-dfd-dfd-', 'qasfdfdaq'}, '-'), {6, [1,5,9], zeros(1,0)})
-%!assert (regexpi ({'asdfg-dfd';'-dfd-dfd-';'qasfdfdaq'}, {'-';'f';'q'}), {6;[3,7];[1,9]})
+%!assert (regexpi ({'asdfg-dfd';'-dfd-dfd-';'qasfdfdaq'}, '-'),
+%!        {6;[1,5,9];zeros(1, 0)})
+%!assert (regexpi ({'asdfg-dfd', '-dfd-dfd-', 'qasfdfdaq'}, '-'),
+%!        {6, [1,5,9], zeros(1,0)})
+%!assert (regexpi ({'asdfg-dfd';'-dfd-dfd-';'qasfdfdaq'}, {'-';'f';'q'}),
+%!        {6;[3,7];[1,9]})
 %!assert (regexpi ('Strings', {'t', 's'}), {2, [1, 7]})
 
 %!assert (regexpi ("\n", '\n'), 1)
@@ -1589,7 +1600,8 @@
 
 ## Empty matches were broken on ARM architecture
 %!test <*52810>
-%! assert (strcmp (regexprep ("\nabc", "^(\t*)(abc)$", "$1$2", "lineanchors"), "\nabc"))
+%! assert (strcmp (regexprep ("\nabc", "^(\t*)(abc)$", "$1$2", "lineanchors"),
+%!                 "\nabc"));
 */
 
 OCTAVE_NAMESPACE_END
--- a/libinterp/corefcn/schur.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/schur.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -46,7 +46,7 @@
   octave_value retval = a;
 
   octave_idx_type n = a.rows ();
-  assert (a.columns () == n);
+  error_unless (a.columns () == n);
 
   const typename Matrix::element_type zero = typename Matrix::element_type ();
 
--- a/libinterp/corefcn/settings.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/settings.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -57,7 +57,9 @@
 
 DEFMETHOD (__display_tokens__, interp, args, nargout,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __display_tokens__ ()
+@deftypefn  {} {@var{val} =} __display_tokens__ ()
+@deftypefnx {} {@var{old_val} =} __display_tokens__ (@var{new_val})
+@deftypefnx {} {@var{old_val} =} __display_tokens__ (@var{new_val}, "local")
 Query or set the internal variable that determines whether Octave's
 lexer displays tokens as they are read.
 @seealso{__lexer_debug_flag__, __token_count__}
@@ -70,7 +72,7 @@
 
 DEFMETHOD (__token_count__, interp, , ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __token_count__ ()
+@deftypefn {} {@var{n} =} __token_count__ ()
 Return the number of language tokens processed since Octave startup.
 @seealso{__lexer_debug_flag__, __display_tokens__}
 @end deftypefn */)
--- a/libinterp/corefcn/sighandlers.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/sighandlers.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -93,8 +93,7 @@
 
     if (save_vars)
       {
-        load_save_system& load_save_sys
-          = __get_load_save_system__ ("my_friendly_exit");
+        load_save_system& load_save_sys = __get_load_save_system__ ();
 
         load_save_sys.dump_octave_core ();
       }
@@ -191,7 +190,7 @@
     static const bool have_sigusr2
       = octave_get_sig_number ("SIGUSR2", &sigusr2);
 
-    child_list& kids = __get_child_list__ ("respond_to_pending_signals");
+    child_list& kids = __get_child_list__ ();
 
     for (int sig = 0; sig < octave_num_signals (); sig++)
       {
@@ -494,7 +493,7 @@
 
 DEFUN (SIG, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} SIG ()
+@deftypefn {} {@var{S} =} SIG ()
 Return a structure containing Unix signal names and their defined values.
 @end deftypefn */)
 {
@@ -517,7 +516,7 @@
        doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} debug_on_interrupt ()
 @deftypefnx {} {@var{old_val} =} debug_on_interrupt (@var{new_val})
-@deftypefnx {} {} debug_on_interrupt (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} debug_on_interrupt (@var{new_val}, "local")
 Query or set the internal variable that controls whether Octave will try
 to enter debugging mode when it receives an interrupt signal (typically
 generated with @kbd{C-c}).
@@ -551,7 +550,7 @@
        doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} sighup_dumps_octave_core ()
 @deftypefnx {} {@var{old_val} =} sighup_dumps_octave_core (@var{new_val})
-@deftypefnx {} {} sighup_dumps_octave_core (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} sighup_dumps_octave_core (@var{new_val}, "local")
 Query or set the internal variable that controls whether Octave tries
 to save all current variables to the file @file{octave-workspace} if it
 receives a hangup signal.
@@ -582,7 +581,7 @@
        doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} sigquit_dumps_octave_core ()
 @deftypefnx {} {@var{old_val} =} sigquit_dumps_octave_core (@var{new_val})
-@deftypefnx {} {} sigquit_dumps_octave_core (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} sigquit_dumps_octave_core (@var{new_val}, "local")
 Query or set the internal variable that controls whether Octave tries
 to save all current variables to the file @file{octave-workspace} if it
 receives a quit signal.
@@ -613,7 +612,7 @@
        doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} sigterm_dumps_octave_core ()
 @deftypefnx {} {@var{old_val} =} sigterm_dumps_octave_core (@var{new_val})
-@deftypefnx {} {} sigterm_dumps_octave_core (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} sigterm_dumps_octave_core (@var{new_val}, "local")
 Query or set the internal variable that controls whether Octave tries
 to save all current variables to the file @file{octave-workspace} if it
 receives a terminate signal.
--- a/libinterp/corefcn/sparse-xdiv.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/sparse-xdiv.h	Mon Aug 29 13:58:00 2022 +0200
@@ -157,7 +157,8 @@
 
 OCTAVE_DEPRECATED (7, "use 'octave::xdiv' instead")
 inline SparseComplexMatrix
-xdiv (const SparseComplexMatrix& a, const SparseComplexMatrix& b, MatrixType& typ)
+xdiv (const SparseComplexMatrix& a, const SparseComplexMatrix& b,
+      MatrixType& typ)
 {
   return octave::xdiv (a, b, typ);
 }
@@ -269,7 +270,8 @@
 
 OCTAVE_DEPRECATED (7, "use 'octave::xleftdiv' instead")
 inline SparseComplexMatrix
-xleftdiv (const SparseComplexMatrix& a, const SparseComplexMatrix& b, MatrixType& typ)
+xleftdiv (const SparseComplexMatrix& a, const SparseComplexMatrix& b,
+          MatrixType& typ)
 {
   return octave::xleftdiv (a, b, typ);
 }
@@ -297,7 +299,8 @@
 
 OCTAVE_DEPRECATED (7, "use 'octave::xleftdiv' instead")
 inline SparseComplexMatrix
-xleftdiv (const ComplexDiagMatrix& a, const SparseComplexMatrix& b, MatrixType& typ)
+xleftdiv (const ComplexDiagMatrix& a, const SparseComplexMatrix& b,
+          MatrixType& typ)
 {
   return octave::xleftdiv (a, b, typ);
 }
--- a/libinterp/corefcn/sparse.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/sparse.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -46,7 +46,7 @@
 
 DEFUN (issparse, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} issparse (@var{x})
+@deftypefn {} {@var{tf} =} issparse (@var{x})
 Return true if @var{x} is a sparse matrix.
 @seealso{ismatrix}
 @end deftypefn */)
@@ -155,9 +155,6 @@
 
   octave_value retval;
 
-  // Temporarily disable sparse_auto_mutate if set (it's obsolete anyway).
-  unwind_protect_var<bool> restore_var (Vsparse_auto_mutate, false);
-
   if (nargin == 1)
     {
       octave_value arg = args(0);
--- a/libinterp/corefcn/stack-frame.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/stack-frame.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -31,6 +31,7 @@
 #include "str-vec.h"
 
 #include "defun.h"
+#include "error.h"
 #include "interpreter.h"
 #include "interpreter-private.h"
 #include "oct-map.h"
@@ -1041,7 +1042,8 @@
                                      const std::shared_ptr<stack_frame>& parent_link,
                                      const std::shared_ptr<stack_frame>& static_link)
   {
-    return new compiled_fcn_stack_frame (tw, fcn, index, parent_link, static_link);
+    return new compiled_fcn_stack_frame (tw, fcn, index,
+                                         parent_link, static_link);
   }
 
   stack_frame * stack_frame::create (tree_evaluator& tw,
@@ -1059,7 +1061,8 @@
                                      const std::shared_ptr<stack_frame>& static_link,
                                      const std::shared_ptr<stack_frame>& access_link)
   {
-    return new user_fcn_stack_frame (tw, fcn, index, parent_link, static_link, access_link);
+    return new user_fcn_stack_frame (tw, fcn, index,
+                                     parent_link, static_link, access_link);
   }
 
   stack_frame * stack_frame::create (tree_evaluator& tw,
@@ -1069,7 +1072,9 @@
                                      const local_vars_map& local_vars,
                                      const std::shared_ptr<stack_frame>& access_link)
   {
-    return new user_fcn_stack_frame (tw, fcn, index, parent_link, static_link, local_vars, access_link);
+    return new user_fcn_stack_frame (tw, fcn, index,
+                                     parent_link, static_link, local_vars,
+                                     access_link);
   }
 
   stack_frame * stack_frame::create (tree_evaluator& tw,
@@ -1599,7 +1604,7 @@
     // scope.  If the symbol wasn't present before, it should be outside
     // the range so we need to resize then update offsets.
 
-    assert (data_offset >= size ());
+    panic_unless (data_offset >= size ());
 
     resize (data_offset+1);
 
@@ -1650,7 +1655,7 @@
 
     if (sym)
       {
-        assert (sym.frame_offset () == 0);
+        panic_unless (sym.frame_offset () == 0);
 
         return sym;
       }
@@ -1679,7 +1684,7 @@
         // All symbol records in a script scope should have zero offset,
         // which means we redirect our lookup using
         // lexical_frame_offsets and values_offets.
-        assert (sym.frame_offset () == 0);
+        panic_unless (sym.frame_offset () == 0);
 
         return sym;
       }
@@ -1689,7 +1694,7 @@
 
     sym = scope.find_symbol (name);
 
-    assert (sym);
+    panic_unless (sym.is_valid ());
 
     resize_and_update_script_offsets (sym);
 
@@ -2100,7 +2105,7 @@
           {
             // FIXME: do we need to ensure that the called
             // function is a child of the caller?  Does it hurt
-            // to assert this condition, at least for now?
+            // to panic_unless this condition, at least for now?
 
             alink = static_link;
           }
@@ -2108,7 +2113,7 @@
           {
             // FIXME: do we need to check that the parent of the
             // called function is also a parent of the caller?
-            // Does it hurt to assert this condition, at least
+            // Does it hurt to panic_unless this condition, at least
             // for now?
 
             int links_to_follow = caller_nesting_depth - nesting_depth + 1;
@@ -2221,7 +2226,7 @@
 
     sym = scope.find_symbol (name);
 
-    assert (sym);
+    panic_unless (sym.is_valid ());
 
     return sym;
   }
@@ -2388,7 +2393,7 @@
 
     sym = m_scope.find_symbol (name);
 
-    assert (sym);
+    panic_unless (sym.is_valid ());
 
     return sym;
   }
--- a/libinterp/corefcn/stream-euler.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/stream-euler.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -506,7 +506,7 @@
 
 DEFUN (__streameuler2d__, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} __streameuler2d__ (@var{U}, @var{V}, @var{TX}, @var{TY}, @var{ZETA}, @var{XI}, @var{H}, @var{MAXNVERTS})
+@deftypefn {} {@var{output} =} __streameuler2d__ (@var{U}, @var{V}, @var{TX}, @var{TY}, @var{ZETA}, @var{XI}, @var{H}, @var{MAXNVERTS})
 Calculates the streamline in a vector field @code{[@var{U}, @var{V}]} starting
 from a seed point at position @code{[@var{ZETA}, @var{XI}]}.  The integrator
 used is Heun's Scheme.  The step size can be controlled by @var{H}.  The
@@ -521,7 +521,7 @@
 
 DEFUN (__streameuler3d__, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} __streameuler3d__ (@var{U}, @var{V}, @var{W}, @var{TX}, @var{TY}, @var{TZ}, @var{ZETA}, @var{XI}, @var{RHO}, @var{H}, @var{MAXNVERTS})
+@deftypefn {} {@var{output} =} __streameuler3d__ (@var{U}, @var{V}, @var{W}, @var{TX}, @var{TY}, @var{TZ}, @var{ZETA}, @var{XI}, @var{RHO}, @var{H}, @var{MAXNVERTS})
 Calculates the streamline in a vector field @code{[@var{U}, @var{V}, @var{W}]}
 starting from a seed point at position
 @code{[@var{ZETA}, @var{XI}, @var{RHO}]}.  The integrator used is Heun's
--- a/libinterp/corefcn/strfind.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/strfind.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -299,8 +299,10 @@
 %!assert (strfind ("abababa", "aba", "forcecelloutput", false), [1, 3, 5])
 %!assert (strfind ("abababa", "aba", "forcecelloutput", true), {[1, 3, 5]})
 %!assert (strfind ({"abababa", "bla", "bla"}, "a"), {[1, 3, 5, 7], 3, 3})
-%!assert (strfind ({"abababa", "bla", "bla"}, "a", "forcecelloutput", false), {[1, 3, 5, 7], 3, 3})
-%!assert (strfind ({"abababa", "bla", "bla"}, "a", "forcecelloutput", true), {[1, 3, 5, 7], 3, 3})
+%!assert (strfind ({"abababa", "bla", "bla"}, "a", "forcecelloutput", false),
+%!        {[1, 3, 5, 7], 3, 3})
+%!assert (strfind ({"abababa", "bla", "bla"}, "a", "forcecelloutput", true),
+%!        {[1, 3, 5, 7], 3, 3})
 %!assert (strfind ("Linux _is_ user-friendly. It just isn't ignorant-friendly or idiot-friendly.", "friendly"), [17, 50, 68])
 %!assert (strfind ("abc", ""), [])
 %!assert (strfind ("abc", {"", "b", ""}), {[], 2, []})
--- a/libinterp/corefcn/strfns.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/strfns.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -52,10 +52,10 @@
 
 DEFUN (char, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} char (@var{x})
-@deftypefnx {} {} char (@var{x}, @dots{})
-@deftypefnx {} {} char (@var{s1}, @var{s2}, @dots{})
-@deftypefnx {} {} char (@var{cell_array})
+@deftypefn  {} {@var{C} =} char (@var{A})
+@deftypefnx {} {@var{C} =} char (@var{A}, @dots{})
+@deftypefnx {} {@var{C} =} char (@var{str1}, @var{str2}, @dots{})
+@deftypefnx {} {@var{C} =} char (@var{cell_array})
 Create a string array from one or more numeric matrices, character
 matrices, or cell arrays.
 
@@ -177,10 +177,10 @@
 
 DEFUN (strvcat, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} strvcat (@var{x})
-@deftypefnx {} {} strvcat (@var{x}, @dots{})
-@deftypefnx {} {} strvcat (@var{s1}, @var{s2}, @dots{})
-@deftypefnx {} {} strvcat (@var{cell_array})
+@deftypefn  {} {@var{C} =} strvcat (@var{A})
+@deftypefnx {} {@var{C} =} strvcat (@var{A}, @dots{})
+@deftypefnx {} {@var{C} =} strvcat (@var{str1}, @var{str2}, @dots{})
+@deftypefnx {} {@var{C} =} strvcat (@var{cell_array})
 Create a character array from one or more numeric matrices, character
 matrices, or cell arrays.
 
@@ -290,7 +290,7 @@
 
 DEFUN (ischar, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} ischar (@var{x})
+@deftypefn {} {@var{tf} =} ischar (@var{x})
 Return true if @var{x} is a character array.
 @seealso{isfloat, isinteger, islogical, isnumeric, isstring, iscellstr, isa}
 @end deftypefn */)
@@ -319,7 +319,7 @@
 */
 
 static octave_value
-do_strcmp_fun (const octave_value& arg0, const octave_value& arg1,
+do_strcmp_fcn (const octave_value& arg0, const octave_value& arg1,
                octave_idx_type n, const char *fcn_name,
                bool (*array_op) (const Array<char>&, const Array<char>&,
                                  octave_idx_type),
@@ -526,7 +526,7 @@
 
 
 // These are required so that they match the same signature as strncmp
-// and strncmpi and can therefore be used in do_strcmp_fun.
+// and strncmpi and can therefore be used in do_strcmp_fcn.
 
 template <typename T, typename T_size_type>
 static bool
@@ -541,11 +541,11 @@
 
 DEFUN (strcmp, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} strcmp (@var{s1}, @var{s2})
-Return 1 if the character strings @var{s1} and @var{s2} are the same,
+@deftypefn {} {@var{tf} =} strcmp (@var{str1}, @var{str2})
+Return 1 if the character strings @var{str1} and @var{str2} are the same,
 and 0 otherwise.
 
-If either @var{s1} or @var{s2} is a cell array of strings, then an array
+If either @var{str1} or @var{str2} is a cell array of strings, then an array
 of the same size is returned, containing the values described above for
 every member of the cell array.  The other argument may also be a cell
 array of strings (of the same size or with only one element), char matrix
@@ -560,7 +560,7 @@
   if (args.length () != 2)
     print_usage ();
 
-  return ovl (do_strcmp_fun (args(0), args(1), 0, "strcmp",
+  return ovl (do_strcmp_fcn (args(0), args(1), 0, "strcmp",
                              strcmp_ignore_n, strcmp_ignore_n));
 }
 
@@ -615,8 +615,8 @@
 
 DEFUN (strncmp, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} strncmp (@var{s1}, @var{s2}, @var{n})
-Return 1 if the first @var{n} characters of strings @var{s1} and @var{s2}
+@deftypefn {} {@var{tf} =} strncmp (@var{str1}, @var{str2}, @var{n})
+Return 1 if the first @var{n} characters of strings @var{str1} and @var{str2}
 are the same, and 0 otherwise.
 
 @example
@@ -626,7 +626,7 @@
 @end group
 @end example
 
-If either @var{s1} or @var{s2} is a cell array of strings, then an array
+If either @var{str1} or @var{str2} is a cell array of strings, then an array
 of the same size is returned, containing the values described above for
 every member of the cell array.  The other argument may also be a cell
 array of strings (of the same size or with only one element), char matrix
@@ -651,7 +651,7 @@
   octave_idx_type n = args(2).idx_type_value ();
 
   if (n > 0)
-    return ovl (do_strcmp_fun (args(0), args(1), n, "strncmp",
+    return ovl (do_strcmp_fcn (args(0), args(1), n, "strncmp",
                                string::strncmp,
                                string::strncmp));
   else
@@ -665,7 +665,8 @@
 %!assert (strncmp ("abce", {"abcd", "bca", "abc"}, 3), logical ([1, 0, 1]))
 %!assert (strncmp ("abc",  {"abcd", "bca", "abc"}, 4), logical ([0, 0, 1]))
 %!assert (strncmp ({"abcd", "bca", "abc"},"abce", 3), logical ([1, 0, 1]))
-%!assert (strncmp ({"abcd", "bca", "abc"},{"abcd", "bca", "abe"}, 3), logical ([1, 1, 0]))
+%!assert (strncmp ({"abcd", "bca", "abc"},{"abcd", "bca", "abe"}, 3),
+%!        logical ([1, 1, 0]))
 %!assert (strncmp ("abc", {"abcd", 10}, 2), logical ([1, 0]))
 
 %!assert <*54373> (strncmp ("abc", "abc", 100))
@@ -676,11 +677,11 @@
 
 DEFUNX ("strcmpi", Fstrcmpi, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} strcmpi (@var{s1}, @var{s2})
-Return 1 if the character strings @var{s1} and @var{s2} are the same,
+@deftypefn {} {@var{tf} =} strcmpi (@var{str1}, @var{str2})
+Return 1 if the character strings @var{str1} and @var{str2} are the same,
 disregarding case of alphabetic characters, and 0 otherwise.
 
-If either @var{s1} or @var{s2} is a cell array of strings, then an array
+If either @var{str1} or @var{str2} is a cell array of strings, then an array
 of the same size is returned, containing the values described above for
 every member of the cell array.  The other argument may also be a cell
 array of strings (of the same size or with only one element), char matrix
@@ -697,7 +698,7 @@
   if (args.length () != 2)
     print_usage ();
 
-  return ovl (do_strcmp_fun (args(0), args(1), 0, "strcmpi",
+  return ovl (do_strcmp_fcn (args(0), args(1), 0, "strcmpi",
                              strcmpi_ignore_n, strcmpi_ignore_n));
 }
 
@@ -707,11 +708,11 @@
 
 DEFUNX ("strncmpi", Fstrncmpi, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} strncmpi (@var{s1}, @var{s2}, @var{n})
+@deftypefn {} {@var{tf} =} strncmpi (@var{str1}, @var{str2}, @var{n})
 Return 1 if the first @var{n} character of @var{s1} and @var{s2} are the
 same, disregarding case of alphabetic characters, and 0 otherwise.
 
-If either @var{s1} or @var{s2} is a cell array of strings, then an array
+If either @var{str1} or @var{str2} is a cell array of strings, then an array
 of the same size is returned, containing the values described above for
 every member of the cell array.  The other argument may also be a cell
 array of strings (of the same size or with only one element), char matrix
@@ -731,7 +732,7 @@
   octave_idx_type n = args(2).idx_type_value ();
 
   if (n > 0)
-    return ovl (do_strcmp_fun (args(0), args(1), n, "strncmpi",
+    return ovl (do_strcmp_fcn (args(0), args(1), n, "strncmpi",
                                string::strncmpi,
                                string::strncmpi));
   else
@@ -746,7 +747,7 @@
 
 DEFUN (str2double, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} str2double (@var{s})
+@deftypefn {} {@var{d} =} str2double (@var{str})
 Convert a string to a real or complex number.
 
 The string must be in one of the following formats where a and b are real
@@ -771,12 +772,12 @@
 more digits.  The special input values @code{Inf}, @code{NaN}, and @code{NA}
 are also accepted.
 
-@var{s} may be a character string, character matrix, or cell array.  For
+@var{str} may be a character string, character matrix, or cell array.  For
 character arrays the conversion is repeated for every row, and a double or
 complex array is returned.  Empty rows in @var{s} are deleted and not
 returned in the numeric array.  For cell arrays each character string
 element is processed and a double or complex array of the same dimensions as
-@var{s} is returned.
+@var{str} is returned.
 
 For unconvertible scalar or character string input @code{str2double} returns
 a NaN@.  Similarly, for character array input @code{str2double} returns a
@@ -786,8 +787,8 @@
 cell array are not strings and the conversion will fail for these elements
 and return NaN.
 
-@code{str2double} can replace @code{str2num}, and it avoids the security
-risk of using @code{eval} on unknown data.
+Programming Note: @code{str2double} can replace @code{str2num}, is more
+efficient, and avoids the security risk of using @code{eval} on unknown data.
 @seealso{str2num}
 @end deftypefn */)
 {
@@ -1141,7 +1142,7 @@
 
 DEFUN (newline, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} newline
+@deftypefn {} {@var{c} =} newline
 Return the character corresponding to a newline.
 
 This is equivalent to @qcode{"@backslashchar{}n"}.
@@ -1179,7 +1180,7 @@
 
 DEFUN (list_in_columns, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} list_in_columns (@var{arg}, @var{width}, @var{prefix})
+@deftypefn {} {@var{str} =} list_in_columns (@var{arg}, @var{width}, @var{prefix})
 Return a string containing the elements of @var{arg} listed in columns with
 an overall maximum width of @var{width} and optional prefix @var{prefix}.
 
--- a/libinterp/corefcn/sub2ind.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/sub2ind.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -27,6 +27,8 @@
 #  include "config.h"
 #endif
 
+#include <utility>
+
 #include "Array-util.h"
 #include "oct-locbuf.h"
 #include "quit.h"
@@ -195,7 +197,7 @@
 
 The input @var{dims} is a dimension vector where each element is the size of
 the array in the respective dimension (@pxref{XREFsize,,@code{size}}).  The
-second input @var{ind} contains linear indies to be converted.
+second input @var{ind} contains linear indices to be converted.
 
 The outputs @var{s1}, @dots{}, @var{sN} contain the converted subscripts.
 
@@ -220,12 +222,8 @@
 The left matrix contains the linear indices for each matrix element.  The right
 matrix shows the subscript tuples for the same matrix.
 
-The following example shows how to convert the two-dimensional indices
-@code{(2,1)} and @code{(2,3)} of a 3-by-3 matrix to linear indices with a
-single call to @code{sub2ind}.
-
 The following example shows how to convert the linear indices @code{2} and
-@code{8} in a 3-by-3 matrix into subscripts.
+@code{8} to appropriate subscripts of a 3-by-3 matrix.
 
 @example
 @group
@@ -264,12 +262,20 @@
 
   octave_value_list retval;
 
-  // Redimension to provided number of subscripts.
+  int nd = (nargout == 0) ? 1 : nargout;
+
   dim_vector dv = get_dim_vector (args(0), "ind2sub").redim (nargout);
 
+  // Redim for 1 will give us a column vector but we want a row vector.
+  if (nd == 1)
+    std::swap (dv(0), dv(1));
+
   try
     {
       retval = Array<octave_value> (ind2sub (dv, args(1).index_vector ()));
+
+      if (nd == 1)
+        retval(0) = retval(1);
     }
   catch (const index_exception& ie)
     {
@@ -314,8 +320,18 @@
 %! r = ind2sub ([2, 2, 2], 1:8);
 %! assert (r, 1:8);
 
+## Indexing beyond specified size (bug #62184)
+%!assert <*62184> (ind2sub (1, 2), 2)
+%!assert <*62184> (ind2sub ([3,3], 10), 10)
+%!test <*62184>
+%! [r,c] = ind2sub ([3,3], 10);
+%! assert ([r, c], [1, 4]);
+%!test <*62184>
+%! [r,c,p] = ind2sub ([3,3], 10);
+%! assert ([r, c, p], [1, 1, 2]);
+
+## Test input validation
 %!error <DIMS must contain integers> ind2sub ([2, -2], 3)
-%!error <index out of range> ind2sub ([2, 2, 2], 1:9)
 %!error <invalid index> ind2sub ([2, 2, 2], -1:8)
 */
 
--- a/libinterp/corefcn/svd.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/svd.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -400,7 +400,7 @@
        doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} svd_driver ()
 @deftypefnx {} {@var{old_val} =} svd_driver (@var{new_val})
-@deftypefnx {} {} svd_driver (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} svd_driver (@var{new_val}, "local")
 Query or set the underlying @sc{lapack} driver used by @code{svd}.
 
 Currently recognized values are @qcode{"gesdd"}, @qcode{"gesvd"}, and
--- a/libinterp/corefcn/sylvester.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/sylvester.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -158,8 +158,10 @@
 }
 
 /*
-%!assert (sylvester ([1, 2; 3, 4], [5, 6; 7, 8], [9, 10; 11, 12]), [1/2, 2/3; 2/3, 1/2], sqrt (eps))
-%!assert (sylvester (single ([1, 2; 3, 4]), single ([5, 6; 7, 8]), single ([9, 10; 11, 12])), single ([1/2, 2/3; 2/3, 1/2]), sqrt (eps ("single")))
+%!assert (sylvester ([1, 2; 3, 4], [5, 6; 7, 8], [9, 10; 11, 12]),
+%!        [1/2, 2/3; 2/3, 1/2], sqrt (eps))
+%!assert (sylvester (single ([1, 2; 3, 4]), single ([5, 6; 7, 8]), single ([9, 10; 11, 12])),
+%!        single ([1/2, 2/3; 2/3, 1/2]), sqrt (eps ("single")))
 
 ## Test input validation
 %!error sylvester ()
--- a/libinterp/corefcn/symbfact.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/symbfact.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -427,7 +427,8 @@
 %! fail ("symbfact (sparse (1), {1})", "TYP must be a string");
 %! fail ("symbfact (sparse (1), 'foobar')", 'unrecognized TYP "foobar"');
 %! fail ("symbfact (sparse (1), 'sym', {'L'})", "MODE must be a string");
-%! fail ('symbfact (sparse (1), "sym", "foobar")', 'unrecognized MODE "foobar"');
+%! fail ('symbfact (sparse (1), "sym", "foobar")',
+%!       'unrecognized MODE "foobar"');
 %! fail ("symbfact (sparse ([1, 2; 3, 4; 5, 6]))", "S must be a square matrix");
 
 */
--- a/libinterp/corefcn/symrec.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/symrec.h	Mon Aug 29 13:58:00 2022 +0200
@@ -194,11 +194,13 @@
 
     explicit operator bool () const { return is_valid (); }
 
-    void set_frame_offset (std::size_t offset) { m_rep->set_frame_offset (offset); }
+    void set_frame_offset (std::size_t offset)
+    { m_rep->set_frame_offset (offset); }
 
     std::size_t frame_offset (void) const { return m_rep->frame_offset (); }
 
-    void set_data_offset (std::size_t offset) { m_rep->set_data_offset (offset); }
+    void set_data_offset (std::size_t offset)
+    { m_rep->set_data_offset (offset); }
 
     std::size_t data_offset (void) const { return m_rep->data_offset (); }
 
--- a/libinterp/corefcn/symscope.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/symscope.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -335,7 +335,8 @@
   }
 
   bool symbol_scope_rep::look_nonlocal (const std::string& name,
-                                        std::size_t offset, symbol_record& result)
+                                        std::size_t offset,
+                                        symbol_record& result)
   {
     offset++;
 
--- a/libinterp/corefcn/symtab.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/symtab.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -722,103 +722,11 @@
     return octave_value (info_map);
   }
 
-  // Remove when corresponding public deprecated function is removed.
-  bool symbol_table::at_top_level_deprecated (void)
-  {
-    return m_interpreter.at_top_level ();
-  }
-
-  // Remove when corresponding public deprecated function is removed.
-  octave_value symbol_table::varval_deprecated (const std::string& name) const
-  {
-    return m_interpreter.varval (name);
-  }
-
-  // Remove when corresponding public deprecated function is removed.
-  octave_value symbol_table::global_varval_deprecated (const std::string& name) const
-  {
-    return m_interpreter.global_varval (name);
-  }
-
-  // Remove when corresponding public deprecated function is removed.
-  octave_value symbol_table::top_level_varval_deprecated (const std::string& name) const
-  {
-    return m_interpreter.top_level_varval (name);
-  }
-
-  // Remove when corresponding public deprecated function is removed.
-  std::list<std::string> symbol_table::global_variable_names_deprecated (void)
-  {
-    return m_interpreter.global_variable_names ();
-  }
-
-  // Remove when corresponding public deprecated function is removed.
-  std::list<std::string> symbol_table::top_level_variable_names_deprecated (void)
-  {
-    return m_interpreter.top_level_variable_names ();
-  }
-
-  // Remove when corresponding public deprecated function is removed.
-  std::list<std::string> symbol_table::variable_names_deprecated (void)
-  {
-    return m_interpreter.variable_names ();
-  }
-
-  // Remove when corresponding public deprecated function is removed.
-  void symbol_table::assign_deprecated (const std::string& name, const octave_value& value)
-  {
-    return m_interpreter.assign (name, value);
-  }
-
-  // Remove when corresponding public deprecated function is removed.
-  void symbol_table::clear_all_deprecated (bool force)
-  {
-    return m_interpreter.clear_all (force);
-  }
-
-  // Remove when corresponding public deprecated function is removed.
-  void symbol_table::clear_global_deprecated (const std::string& name)
-  {
-    return m_interpreter.clear_global_variable (name);
-  }
-
-  // Remove when corresponding public deprecated function is removed.
-  void symbol_table::clear_global_pattern_deprecated (const std::string& pattern)
-  {
-    return m_interpreter.clear_global_variable_pattern (pattern);
-  }
-
-  // Remove when corresponding public deprecated function is removed.
-  void symbol_table::clear_symbol_deprecated (const std::string& name)
-  {
-    return m_interpreter.clear_symbol (name);
-  }
-
-  // Remove when corresponding public deprecated function is removed.
-  void symbol_table::clear_symbol_pattern_deprecated (const std::string& pattern)
-  {
-    return m_interpreter.clear_symbol_pattern (pattern);
-  }
-
-  // Remove when corresponding public deprecated function is removed.
-  void symbol_table::global_assign_deprecated (const std::string& name,
-                                    const octave_value& value)
-  {
-    return m_interpreter.global_assign (name, value);
-  }
-
-  // Remove when corresponding public deprecated function is removed.
-  void symbol_table::top_level_assign_deprecated (const std::string& name,
-                                       const octave_value& value)
-  {
-    return m_interpreter.top_level_assign (name, value);
-  }
-
 DEFMETHOD (__dump_symtab_info__, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn  {} {} __dump_symtab_info__ ()
-@deftypefnx {} {} __dump_symtab_info__ (@var{function})
-Undocumented internal function.
+@deftypefn  {} {@var{S} =} __dump_symtab_info__ ()
+@deftypefnx {} {@var{S} =} __dump_symtab_info__ (@var{function})
+Return a structure with information from the symbol table.
 @end deftypefn */)
 {
   int nargin = args.length ();
@@ -845,7 +753,7 @@
 
 DEFMETHOD (__get_cmdline_fcn_txt__, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __get_cmdline_fcn_txt__ (@var{name})
+@deftypefn {} {@var{str} =} __get_cmdline_fcn_txt__ (@var{name})
 Undocumented internal function.
 @end deftypefn */)
 {
--- a/libinterp/corefcn/symtab.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/symtab.h	Mon Aug 29 13:58:00 2022 +0200
@@ -185,170 +185,6 @@
 
     fcn_info * get_fcn_info (const std::string& name);
 
-    // The remaining functions are all provided for backward
-    // compatibility.  New code should use the functions provided by the
-    // interpreter class.
-
-  private:
-
-    // Remove when corresponding public deprecated function is removed.
-    bool at_top_level_deprecated (void);
-
-    // Remove when corresponding public deprecated function is removed.
-    octave_value varval_deprecated (const std::string& name) const;
-
-    // Remove when corresponding public deprecated function is removed.
-    octave_value global_varval_deprecated (const std::string& name) const;
-
-    // Remove when corresponding public deprecated function is removed.
-    octave_value top_level_varval_deprecated (const std::string& name) const;
-
-    // Remove when corresponding public deprecated function is removed.
-    std::list<std::string> global_variable_names_deprecated (void);
-
-    // Remove when corresponding public deprecated function is removed.
-    std::list<std::string> top_level_variable_names_deprecated (void);
-
-    // Remove when corresponding public deprecated function is removed.
-    std::list<std::string> variable_names_deprecated (void);
-
-    // Remove when corresponding public deprecated function is removed.
-    void assign_deprecated (const std::string& name,
-                            const octave_value& value = octave_value ());
-
-    // Remove when corresponding public deprecated function is removed.
-    // Note, FORCE_ADD no longer has any meaning.
-    void assign_deprecated (const std::string& name, const octave_value& value,
-                            bool /*force_add*/);
-
-    // Remove when corresponding public deprecated function is removed.
-    void clear_all_deprecated (bool force = false);
-
-    // Remove when corresponding public deprecated function is removed.
-    void clear_global_deprecated (const std::string& name);
-
-    // Remove when corresponding public deprecated function is removed.
-    void clear_global_pattern_deprecated (const std::string& pattern);
-
-    // Remove when corresponding public deprecated function is removed.
-    void clear_symbol_deprecated (const std::string& name);
-
-    // Remove when corresponding public deprecated function is removed.
-    void clear_symbol_pattern_deprecated (const std::string& pattern);
-
-    // Remove when corresponding public deprecated function is removed.
-    void global_assign_deprecated (const std::string& name,
-                                   const octave_value& value = octave_value ());
-
-    // Remove when corresponding public deprecated function is removed.
-    void top_level_assign_deprecated (const std::string& name,
-                                      const octave_value& value = octave_value ());
-
-  public:
-
-#if defined (OCTAVE_PROVIDE_DEPRECATED_SYMBOLS)
-    OCTAVE_DEPRECATED (6, "use 'interpreter::at_top_level' instead")
-    bool at_top_level (void)
-    {
-      return at_top_level_deprecated ();
-    }
-
-    OCTAVE_DEPRECATED (6, "use 'interpreter::varval' instead")
-    octave_value varval (const std::string& name) const
-    {
-      return varval_deprecated (name);
-    }
-
-    OCTAVE_DEPRECATED (6, "use 'interpreter::global_varval' instead")
-    octave_value global_varval (const std::string& name) const
-    {
-      return global_varval_deprecated (name);
-    }
-
-    OCTAVE_DEPRECATED (6, "use 'interpreter::top_level_varval' instead")
-    octave_value top_level_varval (const std::string& name) const
-    {
-      return top_level_varval_deprecated (name);
-    }
-
-    OCTAVE_DEPRECATED (6, "use 'interpreter::global_variable_names' instead")
-    std::list<std::string> global_variable_names (void)
-    {
-      return global_variable_names_deprecated ();
-    }
-
-    OCTAVE_DEPRECATED (6, "use 'interpreter::top_level_variable_names' instead")
-    std::list<std::string> top_level_variable_names (void)
-    {
-      return top_level_variable_names_deprecated ();
-    }
-
-    OCTAVE_DEPRECATED (6, "use 'interpreter::variable_names' instead")
-    std::list<std::string> variable_names (void)
-    {
-      return variable_names_deprecated ();
-    }
-
-    OCTAVE_DEPRECATED (6, "use 'interpreter::assign' instead")
-    void assign (const std::string& name,
-                 const octave_value& value = octave_value ())
-    {
-      assign_deprecated (name, value);
-    }
-
-    // Note, FORCE_ADD no longer has any meaning.
-    OCTAVE_DEPRECATED (6, "use 'interpreter::assign' instead")
-    void assign (const std::string& name, const octave_value& value,
-                 bool /*force_add*/)
-    {
-      assign_deprecated (name, value);
-    }
-
-    OCTAVE_DEPRECATED (6, "use 'interpreter::clear_all' instead")
-    void clear_all (bool force = false)
-    {
-      clear_all_deprecated (force);
-    }
-
-    OCTAVE_DEPRECATED (6, "use 'interpreter::clear_global' instead")
-    void clear_global (const std::string& name)
-    {
-      clear_global_deprecated (name);
-    }
-
-    OCTAVE_DEPRECATED (6, "use 'interpreter::clear_global_pattern' instead")
-    void clear_global_pattern (const std::string& pattern)
-    {
-      clear_global_pattern_deprecated (pattern);
-    }
-
-    OCTAVE_DEPRECATED (6, "use 'interpreter::clear_symbol' instead")
-    void clear_symbol (const std::string& name)
-    {
-      clear_symbol_deprecated (name);
-    }
-
-    OCTAVE_DEPRECATED (6, "use 'interpreter::clear_symbol_pattern' instead")
-    void clear_symbol_pattern (const std::string& pattern)
-    {
-      clear_symbol_pattern_deprecated (pattern);
-    }
-
-    OCTAVE_DEPRECATED (6, "use 'interpreter::global_assign' instead")
-    void global_assign (const std::string& name,
-                        const octave_value& value = octave_value ())
-    {
-      global_assign_deprecated (name, value);
-    }
-
-    OCTAVE_DEPRECATED (6, "use 'interpreter::top_level_assign' instead")
-    void top_level_assign (const std::string& name,
-                           const octave_value& value = octave_value ())
-    {
-      top_level_assign_deprecated (name, value);
-    }
-#endif
-
   private:
 
     interpreter& m_interpreter;
--- a/libinterp/corefcn/syscalls.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/syscalls.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -930,7 +930,7 @@
 
 DEFUNX ("S_ISREG", FS_ISREG, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} S_ISREG (@var{mode})
+@deftypefn {} {@var{tf} =} S_ISREG (@var{mode})
 Return true if @var{mode} corresponds to a regular file.
 
 The value of @var{mode} is assumed to be returned from a call to
@@ -948,7 +948,7 @@
 
 DEFUNX ("S_ISDIR", FS_ISDIR, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} S_ISDIR (@var{mode})
+@deftypefn {} {@var{tf} =} S_ISDIR (@var{mode})
 Return true if @var{mode} corresponds to a directory.
 
 The value of @var{mode} is assumed to be returned from a call to
@@ -966,7 +966,7 @@
 
 DEFUNX ("S_ISCHR", FS_ISCHR, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} S_ISCHR (@var{mode})
+@deftypefn {} {@var{tf} =} S_ISCHR (@var{mode})
 Return true if @var{mode} corresponds to a character device.
 
 The value of @var{mode} is assumed to be returned from a call to
@@ -984,7 +984,7 @@
 
 DEFUNX ("S_ISBLK", FS_ISBLK, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} S_ISBLK (@var{mode})
+@deftypefn {} {@var{tf} =} S_ISBLK (@var{mode})
 Return true if @var{mode} corresponds to a block device.
 
 The value of @var{mode} is assumed to be returned from a call to
@@ -1002,7 +1002,7 @@
 
 DEFUNX ("S_ISFIFO", FS_ISFIFO, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} S_ISFIFO (@var{mode})
+@deftypefn {} {@var{tf} =} S_ISFIFO (@var{mode})
 Return true if @var{mode} corresponds to a fifo.
 
 The value of @var{mode} is assumed to be returned from a call to
@@ -1020,7 +1020,7 @@
 
 DEFUNX ("S_ISLNK", FS_ISLNK, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} S_ISLNK (@var{mode})
+@deftypefn {} {@var{tf} =} S_ISLNK (@var{mode})
 Return true if @var{mode} corresponds to a symbolic link.
 
 The value of @var{mode} is assumed to be returned from a call to
@@ -1038,7 +1038,7 @@
 
 DEFUNX ("S_ISSOCK", FS_ISSOCK, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} S_ISSOCK (@var{mode})
+@deftypefn {} {@var{tf} =} S_ISSOCK (@var{mode})
 Return true if @var{mode} corresponds to a socket.
 
 The value of @var{mode} is assumed to be returned from a call to
@@ -1056,7 +1056,7 @@
 
 DEFUN (gethostname, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} gethostname ()
+@deftypefn {} {@var{name} =} gethostname ()
 Return the hostname of the system where Octave is running.
 @end deftypefn */)
 {
@@ -1249,7 +1249,7 @@
 
 DEFUNX ("WIFEXITED", FWIFEXITED, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} WIFEXITED (@var{status})
+@deftypefn {} {@var{tf} =} WIFEXITED (@var{status})
 Given @var{status} from a call to @code{waitpid}, return
 true if the child terminated normally.
 @seealso{waitpid, WEXITSTATUS, WIFSIGNALED, WTERMSIG, WCOREDUMP, WIFSTOPPED,
@@ -1266,7 +1266,7 @@
 
 DEFUNX ("WEXITSTATUS", FWEXITSTATUS, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} WEXITSTATUS (@var{status})
+@deftypefn {} {@var{tf} =} WEXITSTATUS (@var{status})
 Given @var{status} from a call to @code{waitpid}, return
 the exit status of the child.
 
@@ -1285,7 +1285,7 @@
 
 DEFUNX ("WIFSIGNALED", FWIFSIGNALED, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} WIFSIGNALED (@var{status})
+@deftypefn {} {@var{tf} =} WIFSIGNALED (@var{status})
 Given @var{status} from a call to @code{waitpid}, return
 true if the child process was terminated by a signal.
 @seealso{waitpid, WIFEXITED, WEXITSTATUS, WTERMSIG, WCOREDUMP, WIFSTOPPED,
@@ -1302,7 +1302,7 @@
 
 DEFUNX ("WTERMSIG", FWTERMSIG, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} WTERMSIG (@var{status})
+@deftypefn {} {@var{tf} =} WTERMSIG (@var{status})
 Given @var{status} from a call to @code{waitpid}, return
 the number of the signal that caused the child process to terminate.
 
@@ -1321,7 +1321,7 @@
 
 DEFUNX ("WCOREDUMP", FWCOREDUMP, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} WCOREDUMP (@var{status})
+@deftypefn {} {@var{tf} =} WCOREDUMP (@var{status})
 Given @var{status} from a call to @code{waitpid}, return
 true if the child produced a core dump.
 
@@ -1342,7 +1342,7 @@
 
 DEFUNX ("WIFSTOPPED", FWIFSTOPPED, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} WIFSTOPPED (@var{status})
+@deftypefn {} {@var{tf} =} WIFSTOPPED (@var{status})
 Given @var{status} from a call to @code{waitpid}, return
 true if the child process was stopped by delivery of a signal.
 
@@ -1362,7 +1362,7 @@
 
 DEFUNX ("WSTOPSIG", FWSTOPSIG, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} WSTOPSIG (@var{status})
+@deftypefn {} {@var{tf} =} WSTOPSIG (@var{status})
 Given @var{status} from a call to @code{waitpid}, return
 the number of the signal which caused the child to stop.
 
@@ -1381,7 +1381,7 @@
 
 DEFUNX ("WIFCONTINUED", FWIFCONTINUED, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} WIFCONTINUED (@var{status})
+@deftypefn {} {@var{tf} =} WIFCONTINUED (@var{status})
 Given @var{status} from a call to @code{waitpid}, return
 true if the child process was resumed by delivery of @code{SIGCONT}.
 @seealso{waitpid, WIFEXITED, WEXITSTATUS, WIFSIGNALED, WTERMSIG, WCOREDUMP,
@@ -1430,13 +1430,13 @@
 
 DEFUNX ("F_DUPFD", FF_DUPFD, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} F_DUPFD ()
+@deftypefn {} {@var{v} =} F_DUPFD ()
 Return the numerical value to pass to @code{fcntl} to return
 a duplicate file descriptor.
 @seealso{fcntl, F_GETFD, F_GETFL, F_SETFD, F_SETFL}
 @end deftypefn */)
 {
-  static int val = octave_f_dupfd_wrapper ();
+  static const int val = octave_f_dupfd_wrapper ();
 
   if (val < 0)
     err_disabled_feature ("F_DUPFD", "F_DUPFD");
@@ -1446,13 +1446,13 @@
 
 DEFUNX ("F_GETFD", FF_GETFD, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} F_GETFD ()
+@deftypefn {} {@var{v} =} F_GETFD ()
 Return the numerical value to pass to @code{fcntl} to return
 the file descriptor flags.
 @seealso{fcntl, F_DUPFD, F_GETFL, F_SETFD, F_SETFL}
 @end deftypefn */)
 {
-  static int val = octave_f_getfd_wrapper ();
+  static const int val = octave_f_getfd_wrapper ();
 
   if (val < 0)
     err_disabled_feature ("F_GETFD", "F_GETFD");
@@ -1462,13 +1462,13 @@
 
 DEFUNX ("F_GETFL", FF_GETFL, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} F_GETFL ()
+@deftypefn {} {@var{v} =} F_GETFL ()
 Return the numerical value to pass to @code{fcntl} to return
 the file status flags.
 @seealso{fcntl, F_DUPFD, F_GETFD, F_SETFD, F_SETFL}
 @end deftypefn */)
 {
-  static int val = octave_f_getfl_wrapper ();
+  static const int val = octave_f_getfl_wrapper ();
 
   if (val < 0)
     err_disabled_feature ("F_GETFL", "F_GETFL");
@@ -1478,13 +1478,13 @@
 
 DEFUNX ("F_SETFD", FF_SETFD, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} F_SETFD ()
+@deftypefn {} {@var{v} =} F_SETFD ()
 Return the numerical value to pass to @code{fcntl} to set the file
 descriptor flags.
 @seealso{fcntl, F_DUPFD, F_GETFD, F_GETFL, F_SETFL}
 @end deftypefn */)
 {
-  static int val = octave_f_setfd_wrapper ();
+  static const int val = octave_f_setfd_wrapper ();
 
   if (val < 0)
     err_disabled_feature ("F_SETFD", "F_SETFD");
@@ -1494,13 +1494,13 @@
 
 DEFUNX ("F_SETFL", FF_SETFL, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} F_SETFL ()
+@deftypefn {} {@var{v} =} F_SETFL ()
 Return the numerical value to pass to @code{fcntl} to set the file
 status flags.
 @seealso{fcntl, F_DUPFD, F_GETFD, F_GETFL, F_SETFD}
 @end deftypefn */)
 {
-  static int val = octave_f_setfl_wrapper ();
+  static const int val = octave_f_setfl_wrapper ();
 
   if (val < 0)
     err_disabled_feature ("F_SETFL", "F_SETFL");
@@ -1510,7 +1510,7 @@
 
 DEFUNX ("O_APPEND", FO_APPEND, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} O_APPEND ()
+@deftypefn {} {@var{v} =} O_APPEND ()
 Return the numerical value of the @code{O_APPEND} macro.
 
 @code{O_APPEND} is file status flag that may be returned by @code{fcntl}
@@ -1520,7 +1520,7 @@
 O_TRUNC, O_WRONLY}
 @end deftypefn */)
 {
-  static int val = octave_o_append_wrapper ();
+  static const int val = octave_o_append_wrapper ();
 
   if (val < 0)
     err_disabled_feature ("O_APPEND", "O_APPEND");
@@ -1530,7 +1530,7 @@
 
 DEFUNX ("O_ASYNC", FO_ASYNC, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} O_ASYNC ()
+@deftypefn {} {@var{v} =} O_ASYNC ()
 Return the numerical value of the @code{O_ASYNC} macro.
 
 @code{O_ASYNC} is the file status flag that may be returned by
@@ -1539,7 +1539,7 @@
 O_TRUNC, O_WRONLY}
 @end deftypefn */)
 {
-  static int val = octave_o_async_wrapper ();
+  static const int val = octave_o_async_wrapper ();
 
   if (val < 0)
     err_disabled_feature ("O_ASYNC", "O_ASYNC");
@@ -1549,7 +1549,7 @@
 
 DEFUNX ("O_CREAT", FO_CREAT, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} O_CREAT ()
+@deftypefn {} {@var{v} =} O_CREAT ()
 Return the numerical value of the @code{O_CREAT}.
 
 @code{O_CREAT} is the file status flag that may be returned by
@@ -1559,7 +1559,7 @@
 O_TRUNC, O_WRONLY}
 @end deftypefn */)
 {
-  static int val = octave_o_creat_wrapper ();
+  static const int val = octave_o_creat_wrapper ();
 
   if (val < 0)
     err_disabled_feature ("O_CREAT", "O_CREAT");
@@ -1569,7 +1569,7 @@
 
 DEFUNX ("O_EXCL", FO_EXCL, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} O_EXCL ()
+@deftypefn {} {@var{v} =} O_EXCL ()
 Return the numerical value of the @code{O_EXCL}.
 
 @code{O_EXCL} is the file status flag that may be returned by
@@ -1578,7 +1578,7 @@
 O_SYNC, O_TRUNC, O_WRONLY}
 @end deftypefn */)
 {
-  static int val = octave_o_excl_wrapper ();
+  static const int val = octave_o_excl_wrapper ();
 
   if (val < 0)
     err_disabled_feature ("O_EXCL", "O_EXCL");
@@ -1588,7 +1588,7 @@
 
 DEFUNX ("O_NONBLOCK", FO_NONBLOCK, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} O_NONBLOCK ()
+@deftypefn {} {@var{v} =} O_NONBLOCK ()
 Return the numerical value of the @code{O_NONBLOCK}.
 
 @code{O_NONBLOCK} is the file status flag that may be returned by
@@ -1598,7 +1598,7 @@
 O_TRUNC, O_WRONLY}
 @end deftypefn */)
 {
-  static int val = octave_o_nonblock_wrapper ();
+  static const int val = octave_o_nonblock_wrapper ();
 
   if (val < 0)
     err_disabled_feature ("O_NONBLOCK", "O_NONBLOCK");
@@ -1608,7 +1608,7 @@
 
 DEFUNX ("O_RDONLY", FO_RDONLY, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} O_RDONLY ()
+@deftypefn {} {@var{v} =} O_RDONLY ()
 Return the numerical value of the @code{O_RDONLY}.
 
 @code{O_RDONLY} is the file status flag that may be returned by
@@ -1617,7 +1617,7 @@
 O_TRUNC, O_WRONLY}
 @end deftypefn */)
 {
-  static int val = octave_o_rdonly_wrapper ();
+  static const int val = octave_o_rdonly_wrapper ();
 
   if (val < 0)
     err_disabled_feature ("O_RDONLY", "O_RDONLY");
@@ -1627,7 +1627,7 @@
 
 DEFUNX ("O_RDWR", FO_RDWR, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} O_RDWR ()
+@deftypefn {} {@var{v} =} O_RDWR ()
 Return the numerical value of the @code{O_RDWR}.
 
 @code{O_RDWR} is the file status flag that may be returned by
@@ -1637,7 +1637,7 @@
 O_SYNC, O_TRUNC, O_WRONLY}
 @end deftypefn */)
 {
-  static int val = octave_o_rdwr_wrapper ();
+  static const int val = octave_o_rdwr_wrapper ();
 
   if (val < 0)
     err_disabled_feature ("O_RDWR", "O_RDWR");
@@ -1647,7 +1647,7 @@
 
 DEFUNX ("O_SYNC", FO_SYNC, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} O_SYNC ()
+@deftypefn {} {@var{v} =} O_SYNC ()
 Return the numerical value of the @code{O_SYNC}.
 
 @code{O_SYNC} is the file status flag that may be returned by
@@ -1656,7 +1656,7 @@
 O_RDWR, O_TRUNC, O_WRONLY}
 @end deftypefn */)
 {
-  static int val = octave_o_sync_wrapper ();
+  static const int val = octave_o_sync_wrapper ();
 
   if (val < 0)
     err_disabled_feature ("O_SYNC", "O_SYNC");
@@ -1666,7 +1666,7 @@
 
 DEFUNX ("O_TRUNC", FO_TRUNC, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} O_TRUNC ()
+@deftypefn {} {@var{v} =} O_TRUNC ()
 Return the numerical value of the @code{O_TRUNC}.
 
 @code{O_TRUNC} is the file status flag that may be returned by
@@ -1676,7 +1676,7 @@
 O_RDWR, O_SYNC, O_WRONLY}
 @end deftypefn */)
 {
-  static int val = octave_o_trunc_wrapper ();
+  static const int val = octave_o_trunc_wrapper ();
 
   if (val < 0)
     err_disabled_feature ("O_TRUNC", "O_TRUNC");
@@ -1686,7 +1686,7 @@
 
 DEFUNX ("O_WRONLY", FO_WRONLY, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} O_WRONLY ()
+@deftypefn {} {@var{v} =} O_WRONLY ()
 Return the numerical value of the @code{O_WRONLY}.
 
 @code{O_WRONLY} is the file status flag that may be returned by
@@ -1695,7 +1695,7 @@
 O_RDWR, O_SYNC, O_TRUNC}
 @end deftypefn */)
 {
-  static int val = octave_o_wronly_wrapper ();
+  static const int val = octave_o_wronly_wrapper ();
 
   if (val < 0)
     err_disabled_feature ("O_WRONLY", "O_WRONLY");
@@ -1705,7 +1705,7 @@
 
 DEFUNX ("WNOHANG", FWNOHANG, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} WNOHANG ()
+@deftypefn {} {@var{v} =} WNOHANG ()
 Return the numerical value of the @code{WNOHANG} macro.
 
 @code{WNOHANG} is the option argument that may be passed to
@@ -1719,7 +1719,7 @@
 
 DEFUNX ("WUNTRACED", FWUNTRACED, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} WUNTRACED ()
+@deftypefn {} {@var{v} =} WUNTRACED ()
 Return the numerical value of the @code{WUNTRACED} macro.
 
 @code{WUNTRACED} is the option argument that may be passed to
@@ -1733,7 +1733,7 @@
 
 DEFUNX ("WCONTINUE", FWCONTINUE, args, ,
         doc: /* -*- texinfo -*-
-@deftypefn {} {} WCONTINUE ()
+@deftypefn {} {@var{v} =} WCONTINUE ()
 Return the numerical value of the @code{WCONTINUE} macro.
 
 @code{WCONTINUE} is the option argument that may be passed to
--- a/libinterp/corefcn/sysdep.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/sysdep.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -191,8 +191,8 @@
 
 DEFUN (__open_with_system_app__, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} __open_with_system_app__ (@var{file})
-Internal function.  Returns 1 on successful system call and 0 otherwise.
+@deftypefn {} {@var{status} =} __open_with_system_app__ (@var{file})
+Return 1 on successful system call and 0 otherwise.
 @end deftypefn */)
 {
   if (args.length () != 1)
@@ -551,7 +551,7 @@
     int tty_fd = STDIN_FILENO;
     if (! octave_isatty_wrapper (tty_fd))
       {
-        interpreter& interp = __get_interpreter__ ("raw_mode");
+        interpreter& interp = __get_interpreter__ ();
 
         if (interp.interactive () && ! application::forced_interactive ())
           error ("stdin is not a tty!");
@@ -819,7 +819,7 @@
 
 DEFUN (getenv, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} getenv (@var{var})
+@deftypefn {} {@var{val} =} getenv ("@var{var}")
 Return the value of the environment variable @var{var}.
 
 For example,
@@ -847,13 +847,16 @@
 
 DEFUN (setenv, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} setenv (@var{var}, @var{value})
+@deftypefn  {} {} setenv ("@var{var}", @var{value})
 @deftypefnx {} {} setenv (@var{var})
 @deftypefnx {} {} putenv (@dots{})
 Set the value of the environment variable @var{var} to @var{value}.
 
 If no @var{value} is specified then the variable will be assigned the null
 string.
+
+Programming Note: @code{putenv} is an alias for @code{setenv} and can be used
+interchangeably.
 @seealso{unsetenv, getenv}
 @end deftypefn */)
 {
@@ -1209,29 +1212,31 @@
 
 DEFMETHOD (kbhit, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn  {} {} kbhit ()
-@deftypefnx {} {} kbhit (1)
+@deftypefn  {} {@var{c} =} kbhit ()
+@deftypefnx {} {@var{c} =} kbhit (1)
 Read a single keystroke from the keyboard.
 
-If called with an argument, don't wait for a keypress.
+If called with an argument (typically 1), don't wait for a keypress and
+immediately return the next keystroke in the keyboard input buffer or an empty
+string ("") if no keystroke is available.
 
 For example,
 
 @example
-x = kbhit ();
+c = kbhit ();
 @end example
 
 @noindent
-will set @var{x} to the next character typed at the keyboard as soon as
-it is typed.
+will set @var{c} to the next character typed at the keyboard as soon as it is
+typed.
 
 @example
-x = kbhit (1);
+c = kbhit (1);
 @end example
 
 @noindent
-is identical to the above example, but doesn't wait for a keypress,
-returning the empty string if no key is available.
+is identical to the above example, but doesn't wait for a keypress, returning
+the empty string if no key is available.
 @seealso{input, pause}
 @end deftypefn */)
 {
@@ -1272,8 +1277,8 @@
 @end group
 @end example
 
-The following example prints a message and then waits 5 seconds before
-clearing the screen.
+The following example prints a message and then waits 5 seconds before clearing
+the screen.
 
 @example
 @group
@@ -1362,7 +1367,7 @@
 
 DEFUN (isieee, , ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} isieee ()
+@deftypefn {} {@var{tf} =} isieee ()
 Return true if your computer @emph{claims} to conform to the IEEE standard
 for floating point calculations.
 
@@ -1381,7 +1386,7 @@
 
 DEFUN (native_float_format, , ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} native_float_format ()
+@deftypefn {} {@var{fmtstr} =} native_float_format ()
 Return the native floating point format as a string.
 @end deftypefn */)
 {
@@ -1396,8 +1401,8 @@
 
 DEFUN (tilde_expand, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} tilde_expand (@var{string})
-@deftypefnx {} {} tilde_expand (@var{cellstr})
+@deftypefn  {} {@var{newstr} =} tilde_expand (@var{string})
+@deftypefnx {} {@var{newcstr} =} tilde_expand (@var{cellstr})
 Perform tilde expansion on @var{string}.
 
 If @var{string} begins with a tilde character, (@samp{~}), all of the
@@ -1469,7 +1474,7 @@
 
 DEFUN (__blas_version__, , ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} __blas_version__ ()
+@deftypefn {} {@var{verstr} =} __blas_version__ ()
 Undocumented internal function.
 @end deftypefn */)
 {
@@ -1478,7 +1483,7 @@
 
 DEFUN (__lapack_version__, , ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} __lapack_version__ ()
+@deftypefn {} {@var{verstr} =} __lapack_version__ ()
 Undocumented internal function.
 @end deftypefn */)
 {
--- a/libinterp/corefcn/time.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/time.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -293,7 +293,7 @@
 
 DEFUN (strftime, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} strftime (@var{fmt}, @var{tm_struct})
+@deftypefn {} {@var{str} =} strftime (@var{fmt}, @var{tm_struct})
 Format the time structure @var{tm_struct} in a flexible way using the format
 string @var{fmt} that contains @samp{%} substitutions similar to those in
 @code{printf}.
--- a/libinterp/corefcn/toplev.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/toplev.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -54,7 +54,6 @@
 #include "defaults.h"
 #include "defun.h"
 #include "error.h"
-#include "file-io.h"
 #include "help.h"
 #include "interpreter-private.h"
 #include "octave.h"
@@ -114,8 +113,7 @@
   iprocstream *cmd = new iprocstream (cmd_str.c_str ());
   frame.add_delete (cmd);
 
-  child_list& kids
-    = __get_child_list__ ("run_command_and_return_output");
+  child_list& kids = __get_child_list__ ();
   frame.add (&child_list::remove, kids, cmd->pid ());
 
   if (! *cmd)
@@ -342,8 +340,8 @@
 
 DEFUN (__octave_config_info__, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} __octave_config_info__ ()
-@deftypefnx {} {} __octave_config_info__ (@var{option})
+@deftypefn  {} {@var{S} =} __octave_config_info__ ()
+@deftypefnx {} {@var{S} =} __octave_config_info__ (@var{option})
 Return a structure containing configuration and installation information for
 Octave.
 
--- a/libinterp/corefcn/typecast.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/typecast.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -206,8 +206,6 @@
       else if (array.is_uint64_type ())
         get_data_and_bytesize (array.uint64_array_value (), data, byte_size,
                                old_dims, frame);
-      else
-        assert (0);
     }
   else if (array.iscomplex ())
     {
@@ -239,8 +237,8 @@
     ;
   else if (numclass == "char")
     retval = octave_value (reinterpret_copy<charNDArray>
-                           (data, byte_size, old_dims), array.is_dq_string () ? '"'
-                           : '\'');
+                           (data, byte_size, old_dims),
+                           array.is_dq_string () ? '"' : '\'');
   else if (numclass[0] == 'i')
     {
       if (numclass == "int8")
@@ -548,8 +546,6 @@
         retval = do_bitunpack (array.uint32_array_value ());
       else if (array.is_uint64_type ())
         retval = do_bitunpack (array.uint64_array_value ());
-      else
-        assert (0);
     }
   else if (array.iscomplex ())
     {
--- a/libinterp/corefcn/utils.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/utils.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -48,6 +48,7 @@
 #include "pathsearch.h"
 #include "quit.h"
 #include "str-vec.h"
+#include "strcase-wrappers.h"
 #include "vasprintf-wrapper.h"
 
 #include "Cell.h"
@@ -93,7 +94,7 @@
 
 DEFUN (isvarname, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} isvarname (@var{name})
+@deftypefn {} {@var{tf} =} isvarname (@var{name})
 Return true if @var{name} is a valid variable name.
 
 A valid variable name is composed of letters, digits, and underscores ("_"),
@@ -614,8 +615,8 @@
 
 DEFUN (file_in_path, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} file_in_path (@var{path}, @var{file})
-@deftypefnx {} {} file_in_path (@var{path}, @var{file}, "all")
+@deftypefn  {} {@var{fname} =} file_in_path (@var{path}, @var{file})
+@deftypefnx {} {@var{fname} =} file_in_path (@var{path}, @var{file}, "all")
 Return the absolute name of @var{file} if it can be found in @var{path}.
 
 The value of @var{path} should be a colon-separated list of directories in
@@ -692,7 +693,7 @@
     if (! suffix.empty ())
       nm.append (suffix);
 
-    load_path& lp = __get_load_path__ ("file_in_path");
+    load_path& lp = __get_load_path__ ();
 
     return sys::env::make_absolute (lp.find_file (nm));
   }
@@ -716,7 +717,7 @@
 
         if (! local_file_ok)
           {
-            load_path& lp = __get_load_path__ ("find_data_file_in_load_path");
+            load_path& lp = __get_load_path__ ();
 
             // Not directly found; search load path.
             std::string tmp = sys::env::make_absolute (lp.find_file (fname));
@@ -753,7 +754,7 @@
           }
         else if (len > 2 && name[len - 2] == '.' && name[len - 1] == 'm')
           {
-            load_path& lp = __get_load_path__ ("fcn_file_in_path");
+            load_path& lp = __get_load_path__ ();
 
             retval = lp.find_fcn_file (name.substr (0, len-2));
           }
@@ -764,7 +765,7 @@
             if (pos != std::string::npos)
               fname = name.substr (0, pos);
 
-            load_path& lp = __get_load_path__ ("fcn_file_in_path");
+            load_path& lp = __get_load_path__ ();
 
             retval = lp.find_fcn_file (fname);
           }
@@ -782,7 +783,7 @@
 
     if (! dir.empty ())
       {
-        load_path& lp = __get_load_path__ ("contents_file_in_path");
+        load_path& lp = __get_load_path__ ();
 
         std::string tcontents
           = sys::file_ops::concat (lp.find_dir (dir), "Contents.m");
@@ -925,7 +926,7 @@
 
 DEFUN (do_string_escapes, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} do_string_escapes (@var{string})
+@deftypefn {} {@var{newstr} =} do_string_escapes (@var{string})
 Convert escape sequences in @var{string} to the characters they represent.
 
 Escape sequences begin with a leading backslash
@@ -1038,13 +1039,13 @@
 
 DEFUN (undo_string_escapes, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} undo_string_escapes (@var{s})
-Convert special characters in strings back to their escaped forms.
+@deftypefn {} {@var{newstr} =} undo_string_escapes (@var{string})
+Convert special characters in @var{string} back to their escaped forms.
 
 For example, the expression
 
 @example
-bell = "\a";
+@var{bell} = "\a";
 @end example
 
 @noindent
@@ -1070,7 +1071,7 @@
   if (args.length () != 1)
     print_usage ();
 
-  std::string str = args(0).xstring_value ("undo_string_escapes: S argument must be a string");
+  std::string str = args(0).xstring_value ("undo_string_escapes: STRING argument must be a string");
 
   return ovl (undo_string_escapes (str));
 }
@@ -1099,7 +1100,7 @@
 
 DEFUN (is_absolute_filename, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} is_absolute_filename (@var{file})
+@deftypefn {} {@var{tf} =} is_absolute_filename (@var{file})
 Return true if @var{file} is an absolute filename.
 @seealso{is_rooted_relative_filename, make_absolute_filename, isfolder}
 @end deftypefn */)
@@ -1120,7 +1121,7 @@
 
 DEFUN (is_rooted_relative_filename, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} is_rooted_relative_filename (@var{file})
+@deftypefn {} {@var{tf} =} is_rooted_relative_filename (@var{file})
 Return true if @var{file} is a rooted-relative filename.
 @seealso{is_absolute_filename, make_absolute_filename, isfolder}
 @end deftypefn */)
@@ -1141,9 +1142,8 @@
 
 DEFUN (make_absolute_filename, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} make_absolute_filename (@var{file})
-Return the full name of @var{file} beginning from the root of the file
-system.
+@deftypefn {} {@var{abs_fname} =} make_absolute_filename (@var{file})
+Return the full name of @var{file} beginning from the root of the file system.
 
 No check is done for the existence of @var{file}.  No tilde expansion of
 @var{file} is performed.
@@ -1288,7 +1288,7 @@
 
 DEFUN (errno_list, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} errno_list ()
+@deftypefn {} {@var{S} =} errno_list ()
 Return a structure containing the system-dependent errno values.
 @seealso{errno}
 @end deftypefn */)
@@ -1491,33 +1491,6 @@
     return s.length ();
   }
 
-  std::size_t format (std::ostream& os, const std::string& enc, const char *fmt, ...)
-  {
-    std::size_t retval;
-
-    va_list args;
-    va_start (args, fmt);
-
-    retval = vformat (os, enc, fmt, args);
-
-    va_end (args);
-
-    return retval;
-  }
-
-  std::size_t vformat (std::ostream& os, const std::string& enc, const char *fmt,
-                  va_list args)
-  {
-    std::string s = vasprintf (fmt, args);
-
-    if (enc.compare ("utf-8"))
-      os << string::u8_to_encoding ("printf", s, enc);
-    else
-      os << s;
-
-    return s.length ();
-  }
-
   std::string vasprintf (const char *fmt, va_list args)
   {
     std::string retval;
@@ -1562,7 +1535,7 @@
     // Allow free access to graphics resources while the interpreter thread
     // is asleep
 
-    gh_manager& gh_mgr = __get_gh_manager__ ("sleep");
+    gh_manager& gh_mgr = __get_gh_manager__ ();
 
     if (do_graphics_events)
       gh_mgr.unlock ();
@@ -1628,8 +1601,8 @@
 
 DEFMETHOD (isindex, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn  {} {} isindex (@var{ind})
-@deftypefnx {} {} isindex (@var{ind}, @var{n})
+@deftypefn  {} {@var{tf} =} isindex (@var{ind})
+@deftypefnx {} {@var{tf} =} isindex (@var{ind}, @var{n})
 Return true if @var{ind} is a valid index.
 
 Valid indices are either positive integers (although possibly of real data
@@ -1685,8 +1658,8 @@
 */
 
   octave_value_list
-  do_simple_cellfun (octave_value_list (*fun) (const octave_value_list&, int),
-                     const char *fun_name, const octave_value_list& args,
+  do_simple_cellfun (octave_value_list (*fcn) (const octave_value_list&, int),
+                     const char *fcn_name, const octave_value_list& args,
                      int nargout)
   {
     octave_value_list new_args = args;
@@ -1720,7 +1693,7 @@
                 dims = ccells[i].dims ();
               }
             else if (dims != ccells[i].dims ())
-              error ("%s: cell arguments must have matching sizes", fun_name);
+              error ("%s: cell arguments must have matching sizes", fcn_name);
           }
       }
 
@@ -1735,10 +1708,10 @@
 
         octave_quit ();
 
-        const octave_value_list tmp = fun (new_args, nargout);
+        const octave_value_list tmp = fcn (new_args, nargout);
 
         if (tmp.length () < nargout)
-          error ("%s: do_simple_cellfun: internal error", fun_name);
+          error ("%s: do_simple_cellfun: internal error", fcn_name);
 
         for (int i = 0; i < nargout; i++)
           rcells[i](j) = tmp(i);
@@ -1753,12 +1726,12 @@
   }
 
   octave_value
-  do_simple_cellfun (octave_value_list (*fun) (const octave_value_list&, int),
-                     const char *fun_name, const octave_value_list& args)
+  do_simple_cellfun (octave_value_list (*fcn) (const octave_value_list&, int),
+                     const char *fcn_name, const octave_value_list& args)
   {
     octave_value retval;
 
-    const octave_value_list tmp = do_simple_cellfun (fun, fun_name, args, 1);
+    const octave_value_list tmp = do_simple_cellfun (fcn, fcn_name, args, 1);
 
     if (tmp.length () > 0)
       retval = tmp(0);
@@ -1768,7 +1741,7 @@
 
 DEFUN (isstudent, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} isstudent ()
+@deftypefn {} {@var{tf} =} isstudent ()
 Return true if running in the student edition of @sc{matlab}.
 
 @code{isstudent} always returns false in Octave.
--- a/libinterp/corefcn/utils.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/utils.h	Mon Aug 29 13:58:00 2022 +0200
@@ -169,15 +169,8 @@
   format (std::ostream& os, const char *fmt, ...);
 
   extern OCTINTERP_API std::size_t
-  format (std::ostream& os, const std::string& enc, const char *fmt, ...);
-
-  extern OCTINTERP_API std::size_t
   vformat (std::ostream& os, const char *fmt, va_list args);
 
-  extern OCTINTERP_API std::size_t
-  vformat (std::ostream& os, const std::string& enc,
-           const char *fmt, va_list args);
-
   extern OCTINTERP_API std::string
   vasprintf (const char *fmt, va_list args);
 
@@ -188,14 +181,14 @@
 
   extern OCTINTERP_API
   octave_value_list
-  do_simple_cellfun (octave_value_list (*fun) (const octave_value_list&, int),
-                     const char *fun_name, const octave_value_list& args,
+  do_simple_cellfun (octave_value_list (*fcn) (const octave_value_list&, int),
+                     const char *fcn_name, const octave_value_list& args,
                      int nargout);
 
   extern OCTINTERP_API
   octave_value
-  do_simple_cellfun (octave_value_list (*fun) (const octave_value_list&, int),
-                     const char *fun_name, const octave_value_list& args);
+  do_simple_cellfun (octave_value_list (*fcn) (const octave_value_list&, int),
+                     const char *fcn_name, const octave_value_list& args);
 
 OCTAVE_NAMESPACE_END
 
--- a/libinterp/corefcn/variables.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/variables.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -81,8 +81,7 @@
 
   if (! fcn_name.empty ())
     {
-      octave::symbol_table& symtab
-        = octave::__get_symbol_table__ ("is_valid_function");
+      octave::symbol_table& symtab = octave::__get_symbol_table__ ();
 
       octave_value val = symtab.find_function (fcn_name);
 
@@ -124,7 +123,7 @@
 
 DEFMETHOD (isglobal, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} isglobal (@var{name})
+@deftypefn {} {@var{tf} =} isglobal (@var{name})
 Return true if @var{name} is a globally visible variable.
 
 For example:
@@ -328,7 +327,7 @@
 int
 symbol_exist (const std::string& name, const std::string& type)
 {
-  octave::interpreter& interp = octave::__get_interpreter__ ("symbol_exist");
+  octave::interpreter& interp = octave::__get_interpreter__ ();
 
   return octave::symbol_exist (interp, name, type);
 }
@@ -352,8 +351,7 @@
   if (nm.substr (0, 2) == "__")
     nm.append ("__");
 
-  octave::interpreter& interp
-    = octave::__get_interpreter__ ("unique_symbol_name");
+  octave::interpreter& interp = octave::__get_interpreter__ ();
 
   while (symbol_exist (interp, nm, "any"))
     nm.insert (pos++, 1, alpha[GET_IDX (len)]);
@@ -562,8 +560,7 @@
 static octave::unwind_protect *
 curr_fcn_unwind_protect_frame (void)
 {
-  octave::tree_evaluator& tw
-    = octave::__get_evaluator__ ("curr_fcn_unwind_protect_frame");
+  octave::tree_evaluator& tw = octave::__get_evaluator__ ();
 
   return tw.curr_fcn_unwind_protect_frame ();
 }
@@ -772,7 +769,7 @@
 
   int nargin = args.length ();
 
-  assert (var < nchoices);
+  error_unless (var < nchoices);
 
   if (nargout > 0 || nargin == 0)
     retval = choices[var];
@@ -905,8 +902,8 @@
 
 DEFMETHOD (mislocked, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn  {} {} mislocked ()
-@deftypefnx {} {} mislocked (@var{fcn})
+@deftypefn  {} {@var{tf} =} mislocked ()
+@deftypefnx {} {@var{tf} =} mislocked (@var{fcn})
 Return true if the named function @var{fcn} is locked in memory.
 
 If no function is named then return true if the current function is locked.
@@ -1395,7 +1392,7 @@
        doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} missing_function_hook ()
 @deftypefnx {} {@var{old_val} =} missing_function_hook (@var{new_val})
-@deftypefnx {} {} missing_function_hook (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} missing_function_hook (@var{new_val}, "local")
 Query or set the internal variable that specifies the function to call
 to provide extra information when an unknown identifier is referenced.
 
@@ -1412,8 +1409,7 @@
 std::string
 maybe_missing_function_hook (const std::string& name)
 {
-  octave::interpreter& interp
-    = octave::__get_interpreter__ ("maybe_missing_function_hook");
+  octave::interpreter& interp = octave::__get_interpreter__ ();
 
   // Don't do this if we're handling errors.
   if (Vmissing_function_hook.empty ())
@@ -1430,11 +1426,11 @@
         restore_var (Vmissing_function_hook);
 
       // Clear the variable prior to calling the function.
-      const std::string func_name = Vmissing_function_hook;
+      const std::string fcn_name = Vmissing_function_hook;
       Vmissing_function_hook.clear ();
 
       // Call.
-      octave_value_list tmp = octave::feval (func_name, octave_value (name), 1);
+      octave_value_list tmp = octave::feval (fcn_name, octave_value (name), 1);
 
       if (tmp.length () == 1 && tmp(0).is_string ())
         return tmp(0).string_value ();
@@ -1496,7 +1492,7 @@
        doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} missing_component_hook ()
 @deftypefnx {} {@var{old_val} =} missing_component_hook (@var{new_val})
-@deftypefnx {} {} missing_component_hook (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} missing_component_hook (@var{new_val}, "local")
 Query or set the internal variable that specifies the function to call when
 a component of Octave is missing.
 
@@ -1525,45 +1521,3 @@
 }
 
 OCTAVE_NAMESPACE_END
-
-// DEPRECATED in Octave 6
-
-octave_function *
-extract_function (const octave_value& arg, const std::string& warn_for,
-                  const std::string& fname, const std::string& header,
-                  const std::string& trailer)
-{
-  octave_function *retval = is_valid_function (arg, warn_for, 0);
-
-  if (! retval)
-    {
-      std::string s = arg.xstring_value ("%s: argument must be a string",
-                                         warn_for.c_str ());
-
-      std::string cmd = header;
-      cmd.append (s);
-      cmd.append (trailer);
-
-      int parse_status;
-
-      octave::interpreter& interp
-        = octave::__get_interpreter__ ("extract_function");
-
-      interp.eval_string (cmd, true, parse_status, 0);
-
-      if (parse_status != 0)
-        error ("%s: '%s' is not valid as a function",
-               warn_for.c_str (), fname.c_str ());
-
-      retval = is_valid_function (fname, warn_for, 0);
-
-      if (! retval)
-        error ("%s: '%s' is not valid as a function",
-               warn_for.c_str (), fname.c_str ());
-
-      warning ("%s: passing function body as a string is obsolete; please use anonymous functions",
-               warn_for.c_str ());
-    }
-
-  return retval;
-}
--- a/libinterp/corefcn/variables.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/variables.h	Mon Aug 29 13:58:00 2022 +0200
@@ -124,29 +124,34 @@
 
 OCTAVE_DEPRECATED (7, "use 'octave::set_internal_variable' instead")
 inline octave_value
-set_internal_variable (bool& var, const octave_value_list& args, int nargout, const char *nm)
+set_internal_variable (bool& var, const octave_value_list& args, int nargout,
+                       const char *nm)
 {
   return octave::set_internal_variable (var, args, nargout, nm);
 }
 
 OCTAVE_DEPRECATED (7, "use 'octave::set_internal_variable' instead")
 inline octave_value
-set_internal_variable (char& var, const octave_value_list& args, int nargout, const char *nm)
+set_internal_variable (char& var, const octave_value_list& args, int nargout,
+                       const char *nm)
 {
   return octave::set_internal_variable (var, args, nargout, nm);
 }
 
 OCTAVE_DEPRECATED (7, "use 'octave::set_internal_variable' instead")
 inline octave_value
-set_internal_variable (int& var, const octave_value_list& args, int nargout, const char *nm,
-                       int minval = std::numeric_limits<int>::min (), int maxval = std::numeric_limits<int>::max ())
+set_internal_variable (int& var, const octave_value_list& args, int nargout,
+                       const char *nm,
+                       int minval = std::numeric_limits<int>::min (),
+                       int maxval = std::numeric_limits<int>::max ())
 {
   return octave::set_internal_variable (var, args, nargout, nm, minval, maxval);
 }
 
 OCTAVE_DEPRECATED (7, "use 'octave::set_internal_variable' instead")
 inline octave_value
-set_internal_variable (double& var, const octave_value_list& args, int nargout, const char *nm,
+set_internal_variable (double& var, const octave_value_list& args, int nargout,
+                       const char *nm,
                        double minval = -octave::numeric_limits<double>::Inf (),
                        double maxval = octave::numeric_limits<double>::Inf ())
 {
@@ -155,24 +160,24 @@
 
 OCTAVE_DEPRECATED (7, "use 'octave::set_internal_variable' instead")
 inline octave_value
-set_internal_variable (std::string& var, const octave_value_list& args, int nargout, const char *nm,
-                       bool empty_ok = true)
+set_internal_variable (std::string& var, const octave_value_list& args,
+                       int nargout, const char *nm, bool empty_ok = true)
 {
   return octave::set_internal_variable (var, args, nargout, nm, empty_ok);
 }
 
 OCTAVE_DEPRECATED (7, "use 'octave::set_internal_variable' instead")
 inline octave_value
-set_internal_variable (std::string& var, const octave_value_list& args, int nargout, const char *nm,
-                       const char **choices)
+set_internal_variable (std::string& var, const octave_value_list& args,
+                       int nargout, const char *nm, const char **choices)
 {
   return octave::set_internal_variable (var, args, nargout, nm, choices);
 }
 
 OCTAVE_DEPRECATED (7, "use 'octave::set_internal_variable' instead")
 inline octave_value
-set_internal_variable (int& var, const octave_value_list& args, int nargout, const char *nm,
-                       const char **choices)
+set_internal_variable (int& var, const octave_value_list& args, int nargout,
+                       const char *nm, const char **choices)
 {
   return octave::set_internal_variable (var, args, nargout, nm, choices);
 }
@@ -184,12 +189,6 @@
   return octave::maybe_missing_function_hook (name);
 }
 
-OCTAVE_DEPRECATED (6, "use 'octave::get_function_handle' instead")
-extern OCTINTERP_API octave_function *
-extract_function (const octave_value& arg, const std::string& warn_for,
-                  const std::string& fname, const std::string& header,
-                  const std::string& trailer);
-
 #endif
 
 // The following macros should also be considered obsolete.
--- a/libinterp/corefcn/xdiv.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/xdiv.h	Mon Aug 29 13:58:00 2022 +0200
@@ -77,7 +77,8 @@
 
 extern FloatMatrix elem_xdiv (float a, const FloatMatrix& b);
 extern FloatComplexMatrix elem_xdiv (float a, const FloatComplexMatrix& b);
-extern FloatComplexMatrix elem_xdiv (const FloatComplex a, const FloatMatrix& b);
+extern FloatComplexMatrix elem_xdiv (const FloatComplex a,
+                                     const FloatMatrix& b);
 extern FloatComplexMatrix elem_xdiv (const FloatComplex a,
                                      const FloatComplexMatrix& b);
 
@@ -243,31 +244,32 @@
 
 OCTAVE_DEPRECATED (7, "use 'octave::xleftdiv' instead")
 inline Matrix
-xleftdiv (const Matrix& a, const Matrix& b, MatrixType& typ, blas_trans_type transt = blas_no_trans)
+xleftdiv (const Matrix& a, const Matrix& b,
+          MatrixType& typ, blas_trans_type transt = blas_no_trans)
 {
   return octave::xleftdiv (a, b, typ, transt);
 }
 
 OCTAVE_DEPRECATED (7, "use 'octave::xleftdiv' instead")
 inline ComplexMatrix
-xleftdiv (const Matrix& a, const ComplexMatrix& b, MatrixType& typ,
-          blas_trans_type transt = blas_no_trans)
+xleftdiv (const Matrix& a, const ComplexMatrix& b,
+          MatrixType& typ, blas_trans_type transt = blas_no_trans)
 {
   return octave::xleftdiv (a, b, typ, transt);
 }
 
 OCTAVE_DEPRECATED (7, "use 'octave::xleftdiv' instead")
 inline ComplexMatrix
-xleftdiv (const ComplexMatrix& a, const Matrix& b, MatrixType& typ,
-          blas_trans_type transt = blas_no_trans)
+xleftdiv (const ComplexMatrix& a, const Matrix& b,
+          MatrixType& typ, blas_trans_type transt = blas_no_trans)
 {
   return octave::xleftdiv (a, b, typ, transt);
 }
 
 OCTAVE_DEPRECATED (7, "use 'octave::xleftdiv' instead")
 inline ComplexMatrix
-xleftdiv (const ComplexMatrix& a, const ComplexMatrix& b, MatrixType& typ,
-          blas_trans_type transt = blas_no_trans)
+xleftdiv (const ComplexMatrix& a, const ComplexMatrix& b,
+          MatrixType& typ, blas_trans_type transt = blas_no_trans)
 {
   return octave::xleftdiv (a, b, typ, transt);
 }
--- a/libinterp/corefcn/xpow.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/corefcn/xpow.h	Mon Aug 29 13:58:00 2022 +0200
@@ -77,7 +77,8 @@
 
 extern OCTINTERP_API octave_value elem_xpow (double a, const Matrix& b);
 extern OCTINTERP_API octave_value elem_xpow (double a, const ComplexMatrix& b);
-extern OCTINTERP_API octave_value elem_xpow (double a, const octave::range<double>& r);
+extern OCTINTERP_API octave_value elem_xpow (double a,
+                                             const octave::range<double>& r);
 
 extern OCTINTERP_API octave_value elem_xpow (const Matrix& a, double b);
 extern OCTINTERP_API octave_value elem_xpow (const Matrix& a, const Matrix& b);
@@ -88,7 +89,8 @@
 extern OCTINTERP_API octave_value elem_xpow (const Complex& a, const Matrix& b);
 extern OCTINTERP_API octave_value elem_xpow (const Complex& a,
                                              const ComplexMatrix& b);
-extern OCTINTERP_API octave_value elem_xpow (const Complex& a, const octave::range<double>& r);
+extern OCTINTERP_API octave_value elem_xpow (const Complex& a,
+                                             const octave::range<double>& r);
 
 extern OCTINTERP_API octave_value elem_xpow (const ComplexMatrix& a, double b);
 extern OCTINTERP_API octave_value elem_xpow (const ComplexMatrix& a,
--- a/libinterp/dldfcn/__fltk_uigetfile__.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/dldfcn/__fltk_uigetfile__.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -58,7 +58,7 @@
 
 DEFUN_DLD (__fltk_uigetfile__, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __fltk_uigetfile__ (@dots{})
+@deftypefn {} {[@var{fname}, @var{fpath}, @var{fltidx}] =} __fltk_uigetfile__ (@dots{})
 Undocumented internal function.
 @end deftypefn */)
 {
--- a/libinterp/dldfcn/__init_fltk__.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/dldfcn/__init_fltk__.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -159,14 +159,14 @@
 
   void print (const std::string& cmd, const std::string& term)
   {
-    gh_manager& gh_mgr = octave::__get_gh_manager__ ("OpenGL_fltk::print");
+    gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
     octave::gl2ps_print (m_glfcns, gh_mgr.get_object (m_number), cmd, term);
   }
 
   uint8NDArray get_pixels (void)
   {
-    gh_manager& gh_mgr = octave::__get_gh_manager__ ("OpenGL_fltk::get_pixels");
+    gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
     m_renderer.draw (gh_mgr.get_object (m_number));
 
@@ -230,7 +230,7 @@
         m_glfcns.glViewport (0, 0, w (), h ());
       }
 
-    gh_manager& gh_mgr = octave::__get_gh_manager__ ("OpenGL_fltk::draw");
+    gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
     m_renderer.draw (gh_mgr.get_object (m_number));
 
@@ -297,7 +297,7 @@
 
 static void script_cb (Fl_Widget *, void *data)
 {
-  static_cast<uimenu::properties *> (data)->execute_callback ();
+  static_cast<uimenu::properties *> (data)->execute_menuselectedfcn ();
 }
 
 class fltk_uimenu
@@ -411,8 +411,7 @@
 
     for (octave_idx_type ii = 0; ii < uimenu_childs.numel (); ii++)
       {
-        gh_manager& gh_mgr
-          = octave::__get_gh_manager__ ("fltk_uimenu::do_find_uimenu_children");
+        gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
         graphics_object kidgo = gh_mgr.get_object (uimenu_childs (ii));
 
@@ -463,7 +462,7 @@
       }
   }
 
-  void update_callback (uimenu::properties& uimenup)
+  void update_menuselectedfcn (uimenu::properties& uimenup)
   {
     std::string fltk_label = uimenup.get___fltk_label__ ();
     if (! fltk_label.empty ())
@@ -472,7 +471,7 @@
           = const_cast<Fl_Menu_Item *> (m_menubar->find_item (fltk_label.c_str ()));
         if (item)
           {
-            if (! uimenup.get_callback ().isempty ())
+            if (! uimenup.get_menuselectedfcn ().isempty ())
               item->callback (static_cast<Fl_Callback *> (script_cb),
                               static_cast<void *> (&uimenup));
             else
@@ -635,13 +634,13 @@
 
     add_entry (uimenup);
     update_foregroundcolor (uimenup);
-    update_callback (uimenup);
+    update_menuselectedfcn (uimenup);
     update_accelerator (uimenup);
     update_enable (uimenup);
     update_visible (uimenup);
     update_seperator (uimenup);
 
-    gh_manager& gh_mgr = octave::__get_gh_manager__ ("fltk_uimenu::add_to_menu");
+    gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
     for (octave_idx_type ii = 0; ii < len; ii++)
       {
@@ -687,7 +686,7 @@
 
     m_menubar->clear ();
 
-    gh_manager& gh_mgr = octave::__get_gh_manager__ ("fltk_uimenu::add_to_menu");
+    gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
     for (octave_idx_type ii = 0; ii < len; ii++)
       {
@@ -733,7 +732,7 @@
     kids = find_uimenu_children (prop);
     int len = kids.numel ();
 
-    gh_manager& gh_mgr = octave::__get_gh_manager__ ("fltk_uimenu::remove_from_menu");
+    gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
     for (octave_idx_type ii = 0; ii < len; ii++)
       {
@@ -935,7 +934,7 @@
 
   void uimenu_update (const graphics_handle& gh, int id)
   {
-    gh_manager& gh_mgr = octave::__get_gh_manager__ ("plot_window::uimenu_update");
+    gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
     graphics_object uimenu_obj = gh_mgr.get_object (gh);
 
@@ -962,8 +961,8 @@
             m_uimenu->update_accelerator (uimenup);
             break;
 
-          case uimenu::properties::ID_CALLBACK:
-            m_uimenu->update_callback (uimenup);
+          case uimenu::properties::ID_MENUSELECTEDFCN:
+            m_uimenu->update_menuselectedfcn (uimenup);
             break;
 
           case uimenu::properties::ID_CHECKED:
@@ -1155,8 +1154,7 @@
         graphics_handle gh = m_fp.get_currentaxes ();
         if (gh.ok ())
           {
-            gh_manager& gh_mgr
-              = octave::__get_gh_manager__ ("plot_window::set_on_ax_obj");
+            gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
             graphics_object go = gh_mgr.get_object (gh);
 
@@ -1193,7 +1191,7 @@
   void pixel2pos (const graphics_handle& ax, int px, int py, double& xx,
                   double& yy) const
   {
-    gh_manager& gh_mgr = octave::__get_gh_manager__ ("plot_window::pixel2pos");
+    gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
     pixel2pos (gh_mgr.get_object (ax), px, py, xx, yy);
   }
@@ -1216,7 +1214,7 @@
     Matrix kids = m_fp.get_children ();
     int len = kids.numel ();
 
-    gh_manager& gh_mgr = octave::__get_gh_manager__ ("plot_window::pixel2axes_or_ca");
+    gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
     for (int k = 0; k < len; k++)
       {
@@ -1244,7 +1242,7 @@
   void pixel2status (const graphics_handle& ax, int px0, int py0,
                      int px1 = -1, int py1 = -1)
   {
-    gh_manager& gh_mgr = octave::__get_gh_manager__ ("plot_window::pixel2status");
+    gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
     pixel2status (gh_mgr.get_object (ax), px0, py0, px1, py1);
   }
@@ -1292,8 +1290,7 @@
         Matrix pos = m_fp.map_from_boundingbox (px, py);
         m_fp.set_currentpoint (pos);
 
-        gh_manager& gh_mgr
-          = octave::__get_gh_manager__ ("plot_window::set_currentpoint");
+        gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
         graphics_object robj = gh_mgr.get_object (m_fp.get_parent ());
 
@@ -1340,7 +1337,8 @@
       return 0;
   }
 
-  octave_scalar_map format_key_event (int e_key, const char *e_text, int e_state)
+  octave_scalar_map format_key_event (int e_key, const char *e_text,
+                                      int e_state)
   {
     octave_scalar_map evt;
 
@@ -1512,7 +1510,7 @@
         // See Event Propagation http://www.fltk.org/doc-1.3/events.html
         static bool key_resent_detected = false;
 
-        gh_manager& gh_mgr = octave::__get_gh_manager__ ("plot_window::handle");
+        gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
         switch (event)
           {
@@ -1798,7 +1796,8 @@
             case FL_RELEASE:
               if (! m_fp.get_windowbuttonupfcn ().isempty ())
                 {
-                  set_currentpoint (Fl::event_x (), Fl::event_y () - menu_dy ());
+                  set_currentpoint (Fl::event_x (),
+                                    Fl::event_y () - menu_dy ());
                   m_fp.execute_windowbuttonupfcn ();
                 }
 
@@ -2234,7 +2233,7 @@
 
   static int hnd2idx (double h)
   {
-    gh_manager& gh_mgr = octave::__get_gh_manager__ ("figure_manager::hnd2idx");
+    gh_manager& gh_mgr = octave::__get_gh_manager__ ();
 
     graphics_object fobj = gh_mgr.get_object (h);
 
--- a/libinterp/dldfcn/__init_gnuplot__.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/dldfcn/__init_gnuplot__.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -237,8 +237,7 @@
     }
   catch (const octave::execution_exception&)
     {
-      octave::interpreter& interp
-        = octave::__get_interpreter__ ("have_gnuplot_binary");
+      octave::interpreter& interp = octave::__get_interpreter__ ();
 
       interp.recover_from_exception ();
     }
--- a/libinterp/dldfcn/__ode15__.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/dldfcn/__ode15__.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -169,22 +169,22 @@
 
     //Default
     IDA (void)
-      : m_t0 (0.0), m_y0 (), m_yp0 (), m_havejac (false), m_havejacfun (false),
-        m_havejacsparse (false), m_mem (nullptr), m_num (), m_ida_fun (),
+      : m_t0 (0.0), m_y0 (), m_yp0 (), m_havejac (false), m_havejacfcn (false),
+        m_havejacsparse (false), m_mem (nullptr), m_num (), m_ida_fcn (),
         m_ida_jac (), m_dfdy (nullptr), m_dfdyp (nullptr), m_spdfdy (nullptr),
-        m_spdfdyp (nullptr), m_fun (nullptr), m_jacfun (nullptr),
-        m_jacspfun (nullptr), m_jacdcell (nullptr), m_jacspcell (nullptr),
+        m_spdfdyp (nullptr), m_fcn (nullptr), m_jacfcn (nullptr),
+        m_jacspfcn (nullptr), m_jacdcell (nullptr), m_jacspcell (nullptr),
         m_sunJacMatrix (nullptr), m_sunLinearSolver (nullptr)
     { }
 
 
     IDA (realtype t, ColumnVector y, ColumnVector yp,
          const octave_value& ida_fcn, DAERHSFuncIDA daefun)
-      : m_t0 (t), m_y0 (y), m_yp0 (yp), m_havejac (false), m_havejacfun (false),
-        m_havejacsparse (false), m_mem (nullptr), m_num (), m_ida_fun (ida_fcn),
+      : m_t0 (t), m_y0 (y), m_yp0 (yp), m_havejac (false), m_havejacfcn (false),
+        m_havejacsparse (false), m_mem (nullptr), m_num (), m_ida_fcn (ida_fcn),
         m_ida_jac (), m_dfdy (nullptr), m_dfdyp (nullptr), m_spdfdy (nullptr),
-        m_spdfdyp (nullptr), m_fun (daefun), m_jacfun (nullptr),
-        m_jacspfun (nullptr), m_jacdcell (nullptr), m_jacspcell (nullptr),
+        m_spdfdyp (nullptr), m_fcn (daefun), m_jacfcn (nullptr),
+        m_jacspfcn (nullptr), m_jacdcell (nullptr), m_jacspcell (nullptr),
         m_sunJacMatrix (nullptr), m_sunLinearSolver (nullptr)
     { }
 
@@ -202,10 +202,10 @@
     IDA&
     set_jacobian (const octave_value& jac, DAEJacFuncDense j)
     {
-      m_jacfun = j;
+      m_jacfcn = j;
       m_ida_jac = jac;
       m_havejac = true;
-      m_havejacfun = true;
+      m_havejacfcn = true;
       m_havejacsparse = false;
 
       return *this;
@@ -214,10 +214,10 @@
     IDA&
     set_jacobian (const octave_value& jac, DAEJacFuncSparse j)
     {
-      m_jacspfun = j;
+      m_jacspfcn = j;
       m_ida_jac = jac;
       m_havejac = true;
-      m_havejacfun = true;
+      m_havejacfcn = true;
       m_havejacsparse = true;
 
       return *this;
@@ -230,7 +230,7 @@
       m_dfdy = dy;
       m_dfdyp = dyp;
       m_havejac = true;
-      m_havejacfun = false;
+      m_havejacfcn = false;
       m_havejacsparse = false;
 
       return *this;
@@ -244,7 +244,7 @@
       m_spdfdy = dy;
       m_spdfdyp = dyp;
       m_havejac = true;
-      m_havejacfun = false;
+      m_havejacfcn = false;
       m_havejacsparse = true;
 
       return *this;
@@ -358,19 +358,19 @@
     ColumnVector m_y0;
     ColumnVector m_yp0;
     bool m_havejac;
-    bool m_havejacfun;
+    bool m_havejacfcn;
     bool m_havejacsparse;
     void *m_mem;
     octave_f77_int_type m_num;
-    octave_value m_ida_fun;
+    octave_value m_ida_fcn;
     octave_value m_ida_jac;
     Matrix *m_dfdy;
     Matrix *m_dfdyp;
     SparseMatrix *m_spdfdy;
     SparseMatrix *m_spdfdyp;
-    DAERHSFuncIDA m_fun;
-    DAEJacFuncDense m_jacfun;
-    DAEJacFuncSparse m_jacspfun;
+    DAERHSFuncIDA m_fcn;
+    DAEJacFuncDense m_jacfcn;
+    DAEJacFuncSparse m_jacspfcn;
     DAEJacCellDense m_jacdcell;
     DAEJacCellSparse m_jacspcell;
 #  if defined (HAVE_SUNDIALS_SUNCONTEXT)
@@ -397,7 +397,7 @@
 
     ColumnVector yp = IDA::NVecToCol (yyp, m_num);
 
-    ColumnVector res = (*m_fun) (y, yp, t, m_ida_fun);
+    ColumnVector res = (*m_fcn) (y, yp, t, m_ida_fcn);
 
     realtype *puntrr = nv_data_s (rr);
 
@@ -487,8 +487,8 @@
 
     Matrix jac;
 
-    if (m_havejacfun)
-      jac = (*m_jacfun) (y, yp, t, cj, m_ida_jac);
+    if (m_havejacfcn)
+      jac = (*m_jacfcn) (y, yp, t, cj, m_ida_jac);
     else
       jac = (*m_jacdcell) (m_dfdy, m_dfdyp, cj);
 
@@ -510,8 +510,8 @@
 
     SparseMatrix jac;
 
-    if (m_havejacfun)
-      jac = (*m_jacspfun) (y, yp, t, cj, m_ida_jac);
+    if (m_havejacfcn)
+      jac = (*m_jacspfcn) (y, yp, t, cj, m_ida_jac);
     else
       jac = (*m_jacspcell) (m_spdfdy, m_spdfdyp, cj);
 
@@ -863,7 +863,8 @@
 
           }
         else if (index.numel () > 0)
-          // Not first step: register all events and test if stop integration or not
+          // Not first step: register all events and test
+          // if stop integration or not
           {
             te.resize (temp + index.numel ());
             ye.resize (temp + index.numel (), m_num);
@@ -1148,14 +1149,14 @@
 
     bool havejacsparse = options.getfield ("havejacsparse").bool_value ();
 
-    bool havejacfun = options.getfield ("havejacfun").bool_value ();
+    bool havejacfcn = options.getfield ("havejacfcn").bool_value ();
 
     Matrix ida_dfdy, ida_dfdyp;
     SparseMatrix ida_spdfdy, ida_spdfdyp;
 
     if (havejac)
       {
-        if (havejacfun)
+        if (havejacfcn)
           {
             octave_value ida_jac = options.getfield ("Jacobian");
 
@@ -1277,7 +1278,7 @@
 
 DEFUN_DLD (__ode15__, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {@var{t}, @var{y} =} __ode15__ (@var{fun}, @var{tspan}, @var{y0}, @var{yp0}, @var{options}, @var{num_event_args})
+@deftypefn {} {@var{t}, @var{y} =} __ode15__ (@var{fcn}, @var{tspan}, @var{y0}, @var{yp0}, @var{ode_opt}, @var{num_event_args})
 Undocumented internal function.
 @end deftypefn */)
 {
@@ -1288,11 +1289,11 @@
   if (args.length () != 6)
     print_usage ();
 
-  // Check odefun
+  // Check ODE function
   octave_value ida_fcn = args(0);
 
   if (! ida_fcn.is_function_handle ())
-    error ("__ode15__: odefun must be a function handle");
+    error ("__ode15__: FCN must be a function handle");
 
   // Check input tspan
   ColumnVector tspan
@@ -1300,7 +1301,7 @@
 
   octave_idx_type numt = tspan.numel ();
 
-  realtype t0 = tspan (0);
+  realtype t0 = tspan(0);
 
   if (numt < 2)
     error ("__ode15__: TRANGE must contain at least 2 elements");
@@ -1309,23 +1310,23 @@
 
   // input y0 and yp0
   ColumnVector y0
-    = args(2).xvector_value ("__ode15__: initial state y0 must be a vector");
+    = args(2).xvector_value ("__ode15__: initial state Y0 must be a vector");
 
   ColumnVector yp0
-    = args(3).xvector_value ("__ode15__: initial state yp0 must be a vector");
+    = args(3).xvector_value ("__ode15__: initial state YP0 must be a vector");
 
 
   if (y0.numel () != yp0.numel ())
-    error ("__ode15__: initial state y0 and yp0 must have the same length");
+    error ("__ode15__: initial state Y0 and YP0 must have the same length");
   else if (y0.numel () < 1)
-    error ("__ode15__: initial state yp0 must be a vector or a scalar");
+    error ("__ode15__: initial state YP0 must be a vector or a scalar");
 
 
   if (! args(4).isstruct ())
-    error ("__ode15__: OPTS argument must be a structure");
+    error ("__ode15__: ODE_OPT argument must be a structure");
 
   octave_scalar_map options
-    = args(4).xscalar_map_value ("__ode15__: OPTS argument must be a scalar structure");
+    = args(4).xscalar_map_value ("__ode15__: ODE_OPT argument must be a scalar structure");
 
   // Provided number of arguments in the ode callback function
   octave_idx_type num_event_args
--- a/libinterp/dldfcn/audiodevinfo.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/dldfcn/audiodevinfo.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -499,7 +499,8 @@
 %! devinfo = audiodevinfo;
 %! nout = audiodevinfo (0);
 %! nin = audiodevinfo (1);
-%! ## There might be multiple devices with the same name (e.g. on Windows WDM-KS)
+%! ## There might be multiple devices with the same name
+%! ## (e.g., on Windows WDM-KS)
 %! ## Check only the first of each unique device name.
 %! [unq_out_name, idx_unique] = unique ({devinfo.output(:).Name});
 %! unq_out_id = [devinfo.output(idx_unique).ID];
@@ -537,8 +538,8 @@
   void init (void);
   void init_fn (void);
   void set_y (const octave_value& y);
-  void set_y (octave_function *fn);
-  void set_y (std::string fn);
+  void set_y (octave_function *fcn);
+  void set_y (std::string fcn);
   Matrix& get_y (void);
   RowVector get_left (void) const;
   RowVector get_right (void) const;
@@ -563,8 +564,8 @@
   octave_value get_userdata (void);
   PaStream * get_stream (void);
 
+  void play (void);
   void playblocking (void);
-  void play (void);
   void pause (void);
   void resume (void);
   void stop (void);
@@ -884,7 +885,7 @@
   if (isplaying ())
     {
       warning_with_id ("Octave:audio-interrupt",
-                       "interrupting playing audioplayer");
+                       "interrupting audioplayer during playback");
       stop ();
     }
 }
@@ -1003,9 +1004,9 @@
 }
 
 void
-audioplayer::set_y (octave_function *fn)
+audioplayer::set_y (octave_function *fcn)
 {
-  octave_callback_function = fn;
+  octave_callback_function = fcn;
   channels = 2;
   reset_end_sample ();
 }
@@ -1556,7 +1557,7 @@
   if (isrecording ())
     {
       warning_with_id ("Octave:audio-interrupt",
-                       "interrupting recording audiorecorder");
+                       "interrupting audiorecorder during recording");
       stop ();
     }
 }
@@ -1655,7 +1656,9 @@
 void
 audiorecorder::set_channels (int channels_arg)
 {
-  assert (channels_arg == 1 || channels_arg == 2);
+  if (channels_arg != 1 && channels_arg != 2)
+    error ("audiorecorder: number of channels must be 1 or 2");
+
   channels = channels_arg;
 }
 
@@ -1931,7 +1934,7 @@
                           || args(0).is_inline_function ());
 
       if (is_function)
-        error ("audiorecorder: callbacks not yet implemented");
+        error ("audiorecorder: callback functions are not yet implemented");
     }
 
   if (nargin >= 3)
@@ -2159,7 +2162,7 @@
 
 DEFUN_DLD (__recorder_isrecording__, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __recorder_isrecording__ (@var{recorder})
+@deftypefn {} {@var{tf} =} __recorder_isrecording__ (@var{recorder})
 Undocumented internal function.
 @end deftypefn */)
 {
@@ -2343,7 +2346,7 @@
                       || args(0).is_inline_function ());
 
   if (is_function)
-    error ("audioplayer: callbacks not yet implemented");
+    error ("audioplayer: callback functions are not yet implemented");
 
   recorder->set_y (args(0));
   recorder->set_fs (args(1).int_value ());
@@ -2572,7 +2575,7 @@
 
 DEFUN_DLD (__player_isplaying__, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __player_isplaying__ (@var{player})
+@deftypefn {} {@var{tf} =} __player_isplaying__ (@var{player})
 Undocumented internal function.
 @end deftypefn */)
 {
--- a/libinterp/dldfcn/audioread.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/dldfcn/audioread.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -465,8 +465,9 @@
       offset += chunk_size;
     }
 
-  // FIXME: shouldn't we return something to indicate whether the file
-  // was written successfully?
+  // FIXME: Shouldn't we return something to indicate whether the file
+  //        was written successfully?  On the other hand, Matlab doesn't
+  //        return anything.
   return ovl ();
 
 #else
@@ -545,17 +546,26 @@
 ## Test input validation
 %!testif HAVE_SNDFILE
 %! fail ("audiowrite (1, 1, 8e3)", "FILENAME must be a string");
-%! fail ("audiowrite ('foo', int64 (1), 8e3)", "wrong type argument 'int64 scalar'");
-%! fail ("audiowrite ('foo', [0 1], [8e3, 8e3])", "FS must be a positive scalar");
+%! fail ("audiowrite ('foo', int64 (1), 8e3)",
+%!       "wrong type argument 'int64 scalar'");
+%! fail ("audiowrite ('foo', [0 1], [8e3, 8e3])",
+%!       "FS must be a positive scalar");
 %! fail ("audiowrite ('foo', 1, {8e3})", "FS must be a .* integer");
 %! fail ("audiowrite ('foo', 1, -8e3)", "FS must be a positive");
-%! fail ("audiowrite ('foo', 1, 8e3, 'bitspersample')", "invalid number of arguments");
-%! fail ("audiowrite ('foo', 1, 8e3, 'bitspersample', 48)", "wrong number of bits specified");
-%! fail ("audiowrite ('foo', 1, 8e3, 'quality', [2 3 4])", "Quality value must be a scalar");
-%! fail ("audiowrite ('foo', 1, 8e3, 'quality', NaN)", "Quality value must be .* between 0 and 100");
-%! fail ("audiowrite ('foo', 1, 8e3, 'quality', -1)", "Quality value must be .* between 0 and 100");
-%! fail ("audiowrite ('foo', 1, 8e3, 'quality', 101)", "Quality value must be .* between 0 and 100");
-%! fail ("audiowrite ('foo', 1, 8e3, 'foo', 'bar')", "unrecognized option: 'foo'");
+%! fail ("audiowrite ('foo', 1, 8e3, 'bitspersample')",
+%!       "invalid number of arguments");
+%! fail ("audiowrite ('foo', 1, 8e3, 'bitspersample', 48)",
+%!       "wrong number of bits specified");
+%! fail ("audiowrite ('foo', 1, 8e3, 'quality', [2 3 4])",
+%!       "Quality value must be a scalar");
+%! fail ("audiowrite ('foo', 1, 8e3, 'quality', NaN)",
+%!       "Quality value must be .* between 0 and 100");
+%! fail ("audiowrite ('foo', 1, 8e3, 'quality', -1)",
+%!       "Quality value must be .* between 0 and 100");
+%! fail ("audiowrite ('foo', 1, 8e3, 'quality', 101)",
+%!       "Quality value must be .* between 0 and 100");
+%! fail ("audiowrite ('foo', 1, 8e3, 'foo', 'bar')",
+%!       "unrecognized option: 'foo'");
 */
 
 DEFUN_DLD (audioinfo, args, ,
@@ -771,6 +781,8 @@
         }
     }
 
+  return octave_value_list ();
+
 #else
 
   octave_unused_parameter (args);
@@ -779,8 +791,6 @@
                         "getting sound formats through libsndfile");
 
 #endif
-
-  return octave_value_list ();
 }
 
 OCTAVE_NAMESPACE_END
--- a/libinterp/dldfcn/convhulln.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/dldfcn/convhulln.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -304,7 +304,8 @@
 %! [h, v] = convhulln (cube, "Qt");
 %! assert (size (h), [12 3]);
 %! h = sortrows (sort (h, 2), [1:3]);
-%! assert (h, [1 2 4; 1 2 6; 1 4 8; 1 5 6; 1 5 8; 2 3 4; 2 3 7; 2 6 7; 3 4 7; 4 7 8; 5 6 7; 5 7 8]);
+%! assert (h,
+%!         [1 2 4; 1 2 6; 1 4 8; 1 5 6; 1 5 8; 2 3 4; 2 3 7; 2 6 7; 3 4 7; 4 7 8; 5 6 7; 5 7 8]);
 %! assert (v, 1, 10*eps);
 %! [h2, v2] = convhulln (cube);  # Test default option = "Qt"
 %! assert (size (h2), size (h));
@@ -316,7 +317,8 @@
 %! cube = [0 0 0;1 0 0;1 1 0;0 1 0;0 0 1;1 0 1;1 1 1;0 1 1];
 %! [h, v] = convhulln (cube, "QJ");
 %! assert (size (h), [12 3]);
-%! assert (sortrows (sort (h, 2), [1:3]), [1 2 4; 1 2 5; 1 4 5; 2 3 4; 2 3 6; 2 5 6; 3 4 8; 3 6 7; 3 7 8; 4 5 8; 5 6 8; 6 7 8]);
+%! assert (sortrows (sort (h, 2), [1:3]),
+%!         [1 2 4; 1 2 5; 1 4 5; 2 3 4; 2 3 6; 2 5 6; 3 4 8; 3 6 7; 3 7 8; 4 5 8; 5 6 8; 6 7 8]);
 %! assert (v, 1.0, 1e6*eps);
 
 %!testif HAVE_QHULL
--- a/libinterp/dldfcn/fftw.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/dldfcn/fftw.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -49,8 +49,8 @@
 @deftypefnx {} {} fftw ("planner", @var{method})
 @deftypefnx {} {@var{wisdom} =} fftw ("dwisdom")
 @deftypefnx {} {} fftw ("dwisdom", @var{wisdom})
+@deftypefnx {} {@var{nthreads} =} fftw ("threads")
 @deftypefnx {} {} fftw ("threads", @var{nthreads})
-@deftypefnx {} {@var{nthreads} =} fftw ("threads")
 
 Manage @sc{fftw} wisdom data.
 
@@ -134,9 +134,9 @@
 fftw ("threads", @var{NTHREADS})
 @end example
 
-Note that octave must be compiled with multi-threaded @sc{fftw} support for
-this feature.  The number of processors available to the current process is
-used per default.
+Note that Octave must be compiled with multi-threaded @sc{fftw} support for
+this feature.  By default, the number of (logical) processors available to the
+current process or @var{3} is used (whichever is smaller).
 
 @seealso{fft, ifft, fft2, ifft2, fftn, ifftn}
 @end deftypefn */)
--- a/libinterp/dldfcn/gzip.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/dldfcn/gzip.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -577,7 +577,7 @@
 
   template<typename X>
   static octave_value_list
-  xzip (const std::string& func_name, const octave_value_list& args)
+  xzip (const std::string& fcn_name, const octave_value_list& args)
   {
     const octave_idx_type nargin = args.length ();
     if (nargin < 1 || nargin > 2)
@@ -585,7 +585,7 @@
 
     const Array<std::string> source_patterns
       = args(0).xcellstr_value ("%s: FILES must be a character array or cellstr",
-                                func_name.c_str ());
+                                fcn_name.c_str ());
     if (nargin == 1)
       return octave_value (Cell (xzip<X> (source_patterns)));
     else // nargin == 2
--- a/libinterp/octave-value/cdef-class.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/cdef-class.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -312,7 +312,8 @@
   }
 
   void
-  cdef_class::cdef_class_rep::find_methods (std::map<std::string, cdef_method>& meths,
+  cdef_class::cdef_class_rep::find_methods (std::map<std::string,
+                                            cdef_method>& meths,
                                             bool only_inherited,
                                             bool include_ctor)
   {
@@ -633,8 +634,7 @@
   void
   cdef_class::cdef_class_rep::meta_release (void)
   {
-    cdef_manager& cdm
-      = __get_cdef_manager__ ("cdef_class::cdef_class_rep::meta_release");
+    cdef_manager& cdm = __get_cdef_manager__ ();
 
     cdm.unregister_class (wrap ());
   }
@@ -744,8 +744,7 @@
 
         static cdef_object empty_class;
 
-        cdef_manager& cdm
-          = __get_cdef_manager__ ("cdef_class::cdef_class_rep::construct_object");
+        cdef_manager& cdm = __get_cdef_manager__ ();
 
         if (this_cls == cdm.meta_class ())
           {
@@ -891,7 +890,7 @@
           }
       }
 
-    cdef_manager& cdm = __get_cdef_manager__ ("cdef_class::make_meta_class");
+    cdef_manager& cdm = __get_cdef_manager__ ();
 
     retval = cdm.make_class (full_class_name, slist);
 
@@ -1020,9 +1019,9 @@
             // Look for all external methods visible on octave path at the
             // time of loading of the class.
             //
-            // FIXME: This is an "extension" to Matlab behavior, which only looks
-            // in the @-folder containing the original classdef file.  However,
-            // this is easier to implement it that way at the moment.
+            // FIXME: This is an "extension" to Matlab behavior, which only
+            // looks in the @-folder containing the original classdef file.
+            // However, this is easier to implement it that way at the moment.
 
             std::list<std::string> external_methods
               = lp.methods (full_class_name);
@@ -1052,9 +1051,9 @@
         // Property blocks
 
         // FIXME: default property expression should be able to call static
-        //        methods of the class being constructed.  A restricted CLASSNAME
-        //        symbol should be added to the scope before evaluating default
-        //        value expressions.
+        //        methods of the class being constructed.  A restricted
+        //        CLASSNAME symbol should be added to the scope before
+        //        evaluating default value expressions.
 
         std::list<tree_classdef_properties_block *> pb_list
           = b->properties_list ();
@@ -1127,17 +1126,17 @@
                     // list of all valid properties that can be used to
                     // validate the attribute list (see bug #60593).
 
-                    // Install property attributes.  This is done before assigning
-                    // the property accessors so we can do validation by using
-                    // cdef_property methods.
+                    // Install property attributes.  This is done before
+                    // assigning the property accessors so we can do validation
+                    // by using cdef_property methods.
 
                     for (auto& attrnm_val : amap)
                       prop.put (attrnm_val.first, attrnm_val.second);
 
                     // Install property access methods, if any.  Remove the
-                    // accessor methods from the temporary storage map, so we can
-                    // detect which ones are invalid and do not correspond to a
-                    // defined property.
+                    // accessor methods from the temporary storage map, so we
+                    // can detect which ones are invalid and do not correspond
+                    // to a defined property.
 
                     auto git = get_methods.find (prop_name);
 
--- a/libinterp/octave-value/cdef-class.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/cdef-class.h	Mon Aug 29 13:58:00 2022 +0200
@@ -214,7 +214,7 @@
       bool m_handle_class;
 
       // The list of super-class constructors that are called implicitly by the
-      // the classdef engine when creating an object.  These constructors are not
+      // classdef engine when creating an object.  These constructors are not
       // called explicitly by the class constructor.
 
       std::list<cdef_class> m_implicit_ctor_list;
@@ -239,7 +239,8 @@
 
     cdef_class (void) : cdef_meta_object () { }
 
-    cdef_class (const std::string& nm, const std::list<cdef_class>& superclasses)
+    cdef_class (const std::string& nm,
+                const std::list<cdef_class>& superclasses)
       : cdef_meta_object (new cdef_class_rep (superclasses))
     {
       get_rep ()->set_name (nm);
@@ -430,7 +431,7 @@
     friend OCTINTERP_API bool operator != (const cdef_class&, const cdef_class&);
     friend OCTINTERP_API bool operator < (const cdef_class&, const cdef_class&);
 
-    friend OCTINTERP_API void install_classdef (interpreter& interp);
+    friend void install_classdef (octave::interpreter& interp);
   };
 
   inline bool
--- a/libinterp/octave-value/cdef-manager.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/cdef-manager.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -172,7 +172,7 @@
     return retval;
   }
 
-#define META_CLASS_CMP(OP, CLSA, CLSB, FUN)                             \
+#define META_CLASS_CMP(OP, CLSA, CLSB, FCN)                             \
   static octave_value_list                                              \
   class_ ## OP (const octave_value_list& args, int /* nargout */)       \
   {                                                                     \
@@ -189,7 +189,7 @@
                                                                         \
     cdef_class clsb = to_cdef (args(1));                                \
                                                                         \
-    retval(0) = FUN (CLSA, CLSB);                                       \
+    retval(0) = FCN (CLSA, CLSB);                                       \
                                                                         \
     return retval;                                                      \
   }
@@ -281,7 +281,8 @@
 
   static octave_value_list
   package_getAllPackages (interpreter& interp,
-                          const octave_value_list& /* args */, int /* nargout */)
+                          const octave_value_list& /* args */,
+                          int /* nargout */)
   {
     std::map<std::string, cdef_package> toplevel_packages;
 
--- a/libinterp/octave-value/cdef-method.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/cdef-method.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -74,8 +74,7 @@
       {
         if (is_dummy_method (m_function))
           {
-            load_path& lp
-              = __get_load_path__ ("cdef_method::cdef_method_rep::check_method");
+            load_path& lp = __get_load_path__ ();
 
             std::string name = get_name ();
             std::string cls_name = m_dispatch_type;
@@ -218,7 +217,8 @@
     switch (type[0])
       {
       case '(':
-        retval = (execute (idx.front (), type.length () > 1 ? 1 : nargout, true));
+        retval = (execute (idx.front (),
+                           type.length () > 1 ? 1 : nargout, true));
         break;
 
       default:
--- a/libinterp/octave-value/cdef-object.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/cdef-object.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -68,7 +68,7 @@
         frame.protect_var (quit_allowed);
         quit_allowed = false;
 
-        interpreter& interp = __get_interpreter__ ("cdef_object_rep::release");
+        interpreter& interp = __get_interpreter__ ();
 
         interpreter_try (frame);
 
--- a/libinterp/octave-value/cdef-object.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/cdef-object.h	Mon Aug 29 13:58:00 2022 +0200
@@ -207,7 +207,8 @@
     // FIXME: use a null object?
     cdef_object (void) : m_rep (new cdef_object_rep ()) { }
 
-    cdef_object (const cdef_object& obj) : m_rep (obj.m_rep) { m_rep->m_count++; }
+    cdef_object (const cdef_object& obj) : m_rep (obj.m_rep)
+    { m_rep->m_count++; }
 
     cdef_object (cdef_object_rep *r) : m_rep (r) { }
 
@@ -256,7 +257,8 @@
 
     bool is_meta_object (void) const { return m_rep->is_meta_object (); }
 
-    Array<cdef_object> array_value (void) const { return m_rep->array_value (); }
+    Array<cdef_object> array_value (void) const
+    { return m_rep->array_value (); }
 
     void put (const std::string& pname, const octave_value& val)
     {
--- a/libinterp/octave-value/cdef-package.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/cdef-package.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -114,8 +114,7 @@
   {
     std::string symbol_name = get_name () + '.' + nm;
 
-    interpreter& interp
-      = __get_interpreter__ ("cdef_package::cdef_package_rep::find");
+    interpreter& interp = __get_interpreter__ ();
 
     return interp.find (symbol_name);
   }
@@ -194,8 +193,7 @@
     //        match the one already referenced by those classes or
     //        sub-packages.
 
-    cdef_manager& cdm
-      = __get_cdef_manager__ ("cdef_package::cdef_package_rep::meta_release");
+    cdef_manager& cdm = __get_cdef_manager__ ();
 
     // Don't delete the "meta" package.
     if (this != cdm.meta ().get_rep ())
--- a/libinterp/octave-value/cdef-package.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/cdef-package.h	Mon Aug 29 13:58:00 2022 +0200
@@ -61,7 +61,8 @@
 
       ~cdef_package_rep (void) = default;
 
-      cdef_object_rep * copy (void) const { return new cdef_package_rep (*this); }
+      cdef_object_rep * copy (void) const
+      { return new cdef_package_rep (*this); }
 
       bool is_package (void) const { return true; }
 
@@ -226,7 +227,7 @@
       return dynamic_cast<const cdef_package_rep *> (cdef_object::get_rep ());
     }
 
-    friend OCTINTERP_API void install_classdef (interpreter& interp);
+    friend void install_classdef (octave::interpreter& interp);
   };
 }
 
--- a/libinterp/octave-value/cdef-property.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/cdef-property.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -55,7 +55,7 @@
   static bool
   is_method_executing (const octave_value& ov, const cdef_object& obj)
   {
-    tree_evaluator& tw = __get_evaluator__ ("is_method_executing");
+    tree_evaluator& tw = __get_evaluator__ ();
 
     octave_function *stack_fcn = tw.current_function ();
 
--- a/libinterp/octave-value/cdef-utils.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/cdef-utils.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -80,7 +80,7 @@
   lookup_class (const std::string& name, bool error_if_not_found,
                 bool load_if_not_found)
   {
-    cdef_manager& cdm = __get_cdef_manager__ ("lookup_class");
+    cdef_manager& cdm = __get_cdef_manager__ ();
 
     return cdm.find_class (name, error_if_not_found, load_if_not_found);
   }
@@ -238,7 +238,7 @@
   lookup_package (const std::string& name, bool error_if_not_found,
                   bool load_if_not_found)
   {
-    cdef_manager& cdm = __get_cdef_manager__ ("lookup_package");
+    cdef_manager& cdm = __get_cdef_manager__ ();
 
     return cdm.find_package (name, error_if_not_found, load_if_not_found);
   }
@@ -257,7 +257,7 @@
     // methods will use the dispatch class of the class in which they
     // are defined instead of the class in which they are executing.
 
-    tree_evaluator& tw = __get_evaluator__ ("get_class_context");
+    tree_evaluator& tw = __get_evaluator__ ();
 
     std::string dispatch_class = tw.get_dispatch_class ();
 
@@ -318,16 +318,17 @@
                   return true;
                 else if (is_strict_superclass (ctx, cls))
                   {
-                    // Calling a protected method or property in a derived class.
-                    // This is only allowed if the context class knows about it
-                    // and has access to it.
+                    // Calling a protected method or property in a derived
+                    // class.  This is only allowed if the context class knows
+                    // about it and has access to it.
 
                     if (! meth_name.empty ())
                       {
                         cdef_method m = ctx.find_method (meth_name);
 
                         if (m.ok ())
-                          return check_access (ctx, m.get ("Access"), meth_name);
+                          return check_access (ctx,
+                                               m.get ("Access"), meth_name);
 
                         return false;
                       }
--- a/libinterp/octave-value/ov-base-diag.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-base-diag.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -299,7 +299,8 @@
 // FIXME: We really need some traits so that ad hoc hooks like this
 //        are not necessary.
 template <typename T> inline T helper_iscomplex (T) { return false; }
-template <typename T> inline T helper_iscomplex (std::complex<T>) { return true; }
+template <typename T> inline T helper_iscomplex (std::complex<T>)
+{ return true; }
 
 template <typename DMT, typename MT>
 double
--- a/libinterp/octave-value/ov-base-int.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-base-int.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -148,9 +148,9 @@
 {
   octave_base_value *retval = nullptr;
 
-  if (this->matrix.numel () == 1)
+  if (this->m_matrix.numel () == 1)
     retval = new typename octave_value_int_traits<T>::scalar_type
-               (this->matrix (0));
+               (this->m_matrix (0));
 
   return retval;
 }
@@ -171,7 +171,7 @@
     {
       octave_quit ();
 
-      typename T::element_type tmp = this->matrix(i);
+      typename T::element_type tmp = this->m_matrix(i);
 
       typedef typename T::element_type::val_type val_type;
 
@@ -207,70 +207,70 @@
 octave_value
 octave_base_int_matrix<MT>::as_double (void) const
 {
-  return NDArray (this->matrix);
+  return NDArray (this->m_matrix);
 }
 
 template <typename MT>
 octave_value
 octave_base_int_matrix<MT>::as_single (void) const
 {
-  return FloatNDArray (this->matrix);
+  return FloatNDArray (this->m_matrix);
 }
 
 template <typename MT>
 octave_value
 octave_base_int_matrix<MT>::as_int8 (void) const
 {
-  return int8NDArray (this->matrix);
+  return int8NDArray (this->m_matrix);
 }
 
 template <typename MT>
 octave_value
 octave_base_int_matrix<MT>::as_int16 (void) const
 {
-  return int16NDArray (this->matrix);
+  return int16NDArray (this->m_matrix);
 }
 
 template <typename MT>
 octave_value
 octave_base_int_matrix<MT>::as_int32 (void) const
 {
-  return int32NDArray (this->matrix);
+  return int32NDArray (this->m_matrix);
 }
 
 template <typename MT>
 octave_value
 octave_base_int_matrix<MT>::as_int64 (void) const
 {
-  return int64NDArray (this->matrix);
+  return int64NDArray (this->m_matrix);
 }
 
 template <typename MT>
 octave_value
 octave_base_int_matrix<MT>::as_uint8 (void) const
 {
-  return uint8NDArray (this->matrix);
+  return uint8NDArray (this->m_matrix);
 }
 
 template <typename MT>
 octave_value
 octave_base_int_matrix<MT>::as_uint16 (void) const
 {
-  return uint16NDArray (this->matrix);
+  return uint16NDArray (this->m_matrix);
 }
 
 template <typename MT>
 octave_value
 octave_base_int_matrix<MT>::as_uint32 (void) const
 {
-  return uint32NDArray (this->matrix);
+  return uint32NDArray (this->m_matrix);
 }
 
 template <typename MT>
 octave_value
 octave_base_int_matrix<MT>::as_uint64 (void) const
 {
-  return uint64NDArray (this->matrix);
+  return uint64NDArray (this->m_matrix);
 }
 
 template <typename T>
@@ -280,7 +280,7 @@
                                          octave_idx_type j) const
 {
   std::ostringstream buf;
-  octave_print_internal (buf, fmt, this->matrix(i, j));
+  octave_print_internal (buf, fmt, this->m_matrix(i, j));
   return buf.str ();
 }
 
@@ -295,7 +295,7 @@
   for (int i = 0; i < dv.ndims (); i++)
     os << ' ' << dv(i);
 
-  os << "\n" << this->matrix;
+  os << "\n" << this->m_matrix;
 
   return true;
 }
@@ -325,7 +325,7 @@
   if (! is)
     error ("load: failed to load matrix constant");
 
-  this->matrix = tmp;
+  this->m_matrix = tmp;
 
   return true;
 }
@@ -347,7 +347,7 @@
       os.write (reinterpret_cast<char *> (&tmp), 4);
     }
 
-  os.write (reinterpret_cast<const char *> (this->matrix.data ()),
+  os.write (reinterpret_cast<const char *> (this->m_matrix.data ()),
             this->byte_size ());
 
   return true;
@@ -419,7 +419,7 @@
           }
     }
 
-  this->matrix = m;
+  this->m_matrix = m;
   return true;
 }
 
@@ -453,7 +453,8 @@
   if (space_hid < 0) return false;
 #if defined (HAVE_HDF5_18)
   data_hid = H5Dcreate (loc_id, name, save_type_hid, space_hid,
-                        octave_H5P_DEFAULT, octave_H5P_DEFAULT, octave_H5P_DEFAULT);
+                        octave_H5P_DEFAULT, octave_H5P_DEFAULT,
+                        octave_H5P_DEFAULT);
 #else
   data_hid = H5Dcreate (loc_id, name, save_type_hid, space_hid,
                         octave_H5P_DEFAULT);
@@ -465,7 +466,7 @@
     }
 
   retval = H5Dwrite (data_hid, save_type_hid, octave_H5S_ALL, octave_H5S_ALL,
-                     octave_H5P_DEFAULT, this->matrix.data ()) >= 0;
+                     octave_H5P_DEFAULT, this->m_matrix.data ()) >= 0;
 
   H5Dclose (data_hid);
   H5Sclose (space_hid);
@@ -495,7 +496,7 @@
   dim_vector dv;
   int empty = load_hdf5_empty (loc_id, name, dv);
   if (empty > 0)
-    this->matrix.resize (dv);
+    this->m_matrix.resize (dv);
   if (empty)
     return (empty > 0);
 
@@ -539,7 +540,7 @@
                octave_H5P_DEFAULT, m.fortran_vec ()) >= 0)
     {
       retval = true;
-      this->matrix = m;
+      this->m_matrix = m;
     }
 
   H5Sclose (space_id);
@@ -561,7 +562,7 @@
 octave_base_int_matrix<T>::print_raw (std::ostream& os,
                                       bool pr_as_read_syntax) const
 {
-  octave_print_internal (os, this->matrix, pr_as_read_syntax,
+  octave_print_internal (os, this->m_matrix, pr_as_read_syntax,
                          this->current_print_indent_level ());
 }
 
@@ -742,7 +743,8 @@
 
 #if defined (HAVE_HDF5_18)
   data_hid = H5Dcreate (loc_id, name, save_type_hid, space_hid,
-                        octave_H5P_DEFAULT, octave_H5P_DEFAULT, octave_H5P_DEFAULT);
+                        octave_H5P_DEFAULT, octave_H5P_DEFAULT,
+                        octave_H5P_DEFAULT);
 #else
   data_hid = H5Dcreate (loc_id, name, save_type_hid, space_hid,
                         octave_H5P_DEFAULT);
--- a/libinterp/octave-value/ov-base-mat.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-base-mat.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -137,8 +137,8 @@
 
   octave_idx_type n_idx = idx.length ();
 
-  int nd = matrix.ndims ();
-  const MT& cmatrix = matrix;
+  int nd = m_matrix.ndims ();
+  const MT& cmatrix = m_matrix;
 
   // If we catch an indexing error in index_vector, we flag an error in
   // index k.  Ensure it is the right value before each idx_vector call.
@@ -152,7 +152,7 @@
         {
         case 0:
           warn_empty_index (type_name ());
-          retval = matrix;
+          retval = m_matrix;
           break;
 
         case 1:
@@ -163,7 +163,7 @@
             if (! resize_ok && i.is_scalar ())
               retval = cmatrix.checkelem (i(0));
             else
-              retval = MT (matrix.index (i, resize_ok));
+              retval = MT (m_matrix.index (i, resize_ok));
           }
           break;
 
@@ -178,7 +178,7 @@
             if (! resize_ok && i.is_scalar () && j.is_scalar ())
               retval = cmatrix.checkelem (i(0), j(0));
             else
-              retval = MT (matrix.index (i, j, resize_ok));
+              retval = MT (m_matrix.index (i, j, resize_ok));
           }
           break;
 
@@ -186,7 +186,7 @@
           {
             Array<octave::idx_vector> idx_vec (dim_vector (n_idx, 1));
             bool scalar_opt = n_idx == nd && ! resize_ok;
-            const dim_vector dv = matrix.dims ();
+            const dim_vector dv = m_matrix.dims ();
 
             for (k = 0; k < n_idx; k++)
               {
@@ -198,7 +198,7 @@
             if (scalar_opt)
               retval = cmatrix.checkelem (conv_to_int_array (idx_vec));
             else
-              retval = MT (matrix.index (idx_vec, resize_ok));
+              retval = MT (m_matrix.index (idx_vec, resize_ok));
           }
           break;
         }
@@ -244,7 +244,7 @@
           {
             octave::idx_vector i = idx (0).index_vector ();
 
-            matrix.assign (i, rhs);
+            m_matrix.assign (i, rhs);
           }
           break;
 
@@ -255,7 +255,7 @@
             k = 1;
             octave::idx_vector j = idx (1).index_vector ();
 
-            matrix.assign (i, j, rhs);
+            m_matrix.assign (i, j, rhs);
           }
           break;
 
@@ -266,7 +266,7 @@
             for (k = 0; k < n_idx; k++)
               idx_vec(k) = idx(k).index_vector ();
 
-            matrix.assign (idx_vec, rhs);
+            m_matrix.assign (idx_vec, rhs);
           }
           break;
         }
@@ -284,11 +284,11 @@
 
 template <typename MT>
 MatrixType
-octave_base_matrix<MT>::matrix_type (const MatrixType& _typ) const
+octave_base_matrix<MT>::matrix_type (const MatrixType& typ) const
 {
-  delete typ;
-  typ = new MatrixType (_typ);
-  return *typ;
+  delete m_typ;
+  m_typ = new MatrixType (typ);
+  return *m_typ;
 }
 
 template <typename MT>
@@ -298,7 +298,7 @@
 {
   octave_idx_type n_idx = idx.length ();
 
-  int nd = matrix.ndims ();
+  int nd = m_matrix.ndims ();
 
   MT mrhs (dim_vector (1, 1), rhs);
 
@@ -321,10 +321,10 @@
             octave::idx_vector i = idx (0).index_vector ();
 
             // optimize single scalar index.
-            if (i.is_scalar () && i(0) < matrix.numel ())
-              matrix(i(0)) = rhs;
+            if (i.is_scalar () && i(0) < m_matrix.numel ())
+              m_matrix(i(0)) = rhs;
             else
-              matrix.assign (i, mrhs);
+              m_matrix.assign (i, mrhs);
           }
           break;
 
@@ -337,10 +337,10 @@
 
             // optimize two scalar indices.
             if (i.is_scalar () && j.is_scalar () && nd == 2
-                && i(0) < matrix.rows () && j(0) < matrix.columns ())
-              matrix(i(0), j(0)) = rhs;
+                && i(0) < m_matrix.rows () && j(0) < m_matrix.columns ())
+              m_matrix(i(0), j(0)) = rhs;
             else
-              matrix.assign (i, j, mrhs);
+              m_matrix.assign (i, j, mrhs);
           }
           break;
 
@@ -348,7 +348,7 @@
           {
             Array<octave::idx_vector> idx_vec (dim_vector (n_idx, 1));
             bool scalar_opt = n_idx == nd;
-            const dim_vector dv = matrix.dims ().redim (n_idx);
+            const dim_vector dv = m_matrix.dims ().redim (n_idx);
 
             for (k = 0; k < n_idx; k++)
               {
@@ -369,10 +369,10 @@
                     j += idx_vec(i)(0) * n;
                     n *= dv (i);
                   }
-                matrix(j) = rhs;
+                m_matrix(j) = rhs;
               }
             else
-              matrix.assign (idx_vec, mrhs);
+              m_matrix.assign (idx_vec, mrhs);
           }
           break;
         }
@@ -399,7 +399,7 @@
   for (octave_idx_type i = 0; i < len; i++)
     ra_idx(i) = idx(i).index_vector ();
 
-  matrix.delete_elements (ra_idx);
+  m_matrix.delete_elements (ra_idx);
 
   // Clear cache.
   clear_cached_info ();
@@ -409,7 +409,7 @@
 octave_value
 octave_base_matrix<MT>::resize (const dim_vector& dv, bool fill) const
 {
-  MT retval (matrix);
+  MT retval (m_matrix);
   if (fill)
     retval.resize (dv, 0);
   else
@@ -423,12 +423,12 @@
 octave_base_matrix<MT>::is_true (void) const
 {
   bool retval = false;
-  dim_vector dv = matrix.dims ();
+  dim_vector dv = m_matrix.dims ();
   int nel = dv.numel ();
 
   if (nel > 0)
     {
-      MT t1 (matrix.reshape (dim_vector (nel, 1)));
+      MT t1 (m_matrix.reshape (dim_vector (nel, 1)));
 
       if (t1.any_element_is_nan ())
         octave::err_nan_to_logical_conversion ();
@@ -466,25 +466,25 @@
 octave_base_matrix<MT>::print_info (std::ostream& os,
                                     const std::string& prefix) const
 {
-  matrix.print_info (os, prefix);
+  m_matrix.print_info (os, prefix);
 }
 
 template <typename MT>
 void
 octave_base_matrix<MT>::short_disp (std::ostream& os) const
 {
-  if (matrix.isempty ())
+  if (m_matrix.isempty ())
     os << "[]";
-  else if (matrix.ndims () == 2)
+  else if (m_matrix.ndims () == 2)
     {
       // FIXME: should this be configurable?
       octave_idx_type max_elts = 10;
       octave_idx_type elts = 0;
 
-      octave_idx_type nel = matrix.numel ();
+      octave_idx_type nel = m_matrix.numel ();
 
-      octave_idx_type nr = matrix.rows ();
-      octave_idx_type nc = matrix.columns ();
+      octave_idx_type nr = m_matrix.rows ();
+      octave_idx_type nc = m_matrix.columns ();
 
       os << '[';
 
@@ -493,7 +493,7 @@
           for (octave_idx_type j = 0; j < nc; j++)
             {
               std::ostringstream buf;
-              octave_print_internal (buf, matrix(j*nr+i));
+              octave_print_internal (buf, m_matrix(j*nr+i));
               std::string tmp = buf.str ();
               std::size_t pos = tmp.find_first_not_of (' ');
               if (pos != std::string::npos)
@@ -525,7 +525,7 @@
 float_display_format
 octave_base_matrix<MT>::get_edit_display_format (void) const
 {
-  return make_format (matrix);
+  return make_format (m_matrix);
 }
 
 template <typename MT>
@@ -535,7 +535,7 @@
                                       octave_idx_type j) const
 {
   std::ostringstream buf;
-  octave_print_internal (buf, fmt, matrix(i, j));
+  octave_print_internal (buf, fmt, m_matrix(i, j));
   return buf.str ();
 }
 
@@ -543,8 +543,8 @@
 octave_value
 octave_base_matrix<MT>::fast_elem_extract (octave_idx_type n) const
 {
-  if (n < matrix.numel ())
-    return matrix(n);
+  if (n < m_matrix.numel ())
+    return m_matrix(n);
   else
     return octave_value ();
 }
@@ -554,7 +554,7 @@
 octave_base_matrix<MT>::fast_elem_insert (octave_idx_type n,
                                           const octave_value& x)
 {
-  if (n < matrix.numel ())
+  if (n < m_matrix.numel ())
     {
       // Don't use builtin_type () here to avoid an extra VM call.
       typedef typename MT::element_type ET;
@@ -563,7 +563,7 @@
         return false;
 
       // Set up the pointer to the proper place.
-      void *here = reinterpret_cast<void *> (&matrix(n));
+      void *here = reinterpret_cast<void *> (&m_matrix(n));
       // Ask x to store there if it can.
       return x.get_rep ().fast_elem_insert_self (here, btyp);
     }
--- a/libinterp/octave-value/ov-base-mat.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-base-mat.h	Mon Aug 29 13:58:00 2022 +0200
@@ -54,31 +54,32 @@
   typedef MT object_type;
 
   octave_base_matrix (void)
-    : octave_base_value (), matrix (), typ (), idx_cache () { }
+    : octave_base_value (), m_matrix (), m_typ (), m_idx_cache () { }
 
   octave_base_matrix (const MT& m, const MatrixType& t = MatrixType ())
-    : octave_base_value (), matrix (m),
-      typ (t.is_known () ? new MatrixType (t) : nullptr), idx_cache ()
+    : octave_base_value (), m_matrix (m),
+      m_typ (t.is_known () ? new MatrixType (t) : nullptr), m_idx_cache ()
   {
-    if (matrix.ndims () == 0)
-      matrix.resize (dim_vector (0, 0));
+    if (m_matrix.ndims () == 0)
+      m_matrix.resize (dim_vector (0, 0));
   }
 
   octave_base_matrix (const octave_base_matrix& m)
-    : octave_base_value (), matrix (m.matrix),
-      typ (m.typ ? new MatrixType (*m.typ) : nullptr),
-      idx_cache (m.idx_cache ? new octave::idx_vector (*m.idx_cache) : nullptr)
+    : octave_base_value (), m_matrix (m.m_matrix),
+      m_typ (m.m_typ ? new MatrixType (*m.m_typ) : nullptr),
+      m_idx_cache (m.m_idx_cache ? new octave::idx_vector (*m.m_idx_cache)
+                                 : nullptr)
   { }
 
   ~octave_base_matrix (void) { clear_cached_info (); }
 
-  std::size_t byte_size (void) const { return matrix.byte_size (); }
+  std::size_t byte_size (void) const { return m_matrix.byte_size (); }
 
-  octave_value squeeze (void) const { return MT (matrix.squeeze ()); }
+  octave_value squeeze (void) const { return MT (m_matrix.squeeze ()); }
 
-  octave_value full_value (void) const { return matrix; }
+  octave_value full_value (void) const { return m_matrix; }
 
-  void maybe_economize (void) { matrix.maybe_economize (); }
+  void maybe_economize (void) { m_matrix.maybe_economize (); }
 
   // We don't need to override all three forms of subsref.  The using
   // declaration will avoid warnings about partially-overloaded virtual
@@ -113,48 +114,48 @@
 
   OCTINTERP_API void delete_elements (const octave_value_list& idx);
 
-  dim_vector dims (void) const { return matrix.dims (); }
+  dim_vector dims (void) const { return m_matrix.dims (); }
 
-  octave_idx_type numel (void) const { return matrix.numel (); }
+  octave_idx_type numel (void) const { return m_matrix.numel (); }
 
-  int ndims (void) const { return matrix.ndims (); }
+  int ndims (void) const { return m_matrix.ndims (); }
 
-  octave_idx_type nnz (void) const { return matrix.nnz (); }
+  octave_idx_type nnz (void) const { return m_matrix.nnz (); }
 
   octave_value reshape (const dim_vector& new_dims) const
-  { return MT (matrix.reshape (new_dims)); }
+  { return MT (m_matrix.reshape (new_dims)); }
 
   octave_value permute (const Array<int>& vec, bool inv = false) const
-  { return MT (matrix.permute (vec, inv)); }
+  { return MT (m_matrix.permute (vec, inv)); }
 
   octave_value resize (const dim_vector& dv, bool fill = false) const;
 
-  octave_value all (int dim = 0) const { return matrix.all (dim); }
-  octave_value any (int dim = 0) const { return matrix.any (dim); }
+  octave_value all (int dim = 0) const { return m_matrix.all (dim); }
+  octave_value any (int dim = 0) const { return m_matrix.any (dim); }
 
-  MatrixType matrix_type (void) const { return typ ? *typ : MatrixType (); }
+  MatrixType matrix_type (void) const { return m_typ ? *m_typ : MatrixType (); }
   MatrixType matrix_type (const MatrixType& _typ) const;
 
   octave_value diag (octave_idx_type k = 0) const
-  { return octave_value (matrix.diag (k)); }
+  { return octave_value (m_matrix.diag (k)); }
 
   octave_value diag (octave_idx_type m, octave_idx_type n) const
-  { return octave_value (matrix.diag (m, n)); }
+  { return octave_value (m_matrix.diag (m, n)); }
 
   octave_value sort (octave_idx_type dim = 0, sortmode mode = ASCENDING) const
-  { return octave_value (matrix.sort (dim, mode)); }
+  { return octave_value (m_matrix.sort (dim, mode)); }
   octave_value sort (Array<octave_idx_type>& sidx, octave_idx_type dim = 0,
                      sortmode mode = ASCENDING) const
-  { return octave_value (matrix.sort (sidx, dim, mode)); }
+  { return octave_value (m_matrix.sort (sidx, dim, mode)); }
 
   sortmode issorted (sortmode mode = UNSORTED) const
-  { return matrix.issorted (mode); }
+  { return m_matrix.issorted (mode); }
 
   Array<octave_idx_type> sort_rows_idx (sortmode mode = ASCENDING) const
-  { return matrix.sort_rows_idx (mode); }
+  { return m_matrix.sort_rows_idx (mode); }
 
   sortmode is_sorted_rows (sortmode mode = UNSORTED) const
-  { return matrix.is_sorted_rows (mode); }
+  { return m_matrix.is_sorted_rows (mode); }
 
   bool is_matrix_type (void) const { return true; }
 
@@ -184,12 +185,12 @@
   MT& matrix_ref (void)
   {
     clear_cached_info ();
-    return matrix;
+    return m_matrix;
   }
 
   const MT& matrix_ref (void) const
   {
-    return matrix;
+    return m_matrix;
   }
 
   OCTINTERP_API octave_value
@@ -200,27 +201,27 @@
 
   // This function exists to support the MEX interface.
   // You should not use it anywhere else.
-  const void * mex_get_data (void) const { return matrix.data (); }
+  const void * mex_get_data (void) const { return m_matrix.data (); }
 
 protected:
 
-  MT matrix;
+  MT m_matrix;
 
   octave::idx_vector set_idx_cache (const octave::idx_vector& idx) const
   {
-    delete idx_cache;
-    idx_cache = (idx ? new octave::idx_vector (idx) : nullptr);
+    delete m_idx_cache;
+    m_idx_cache = (idx ? new octave::idx_vector (idx) : nullptr);
     return idx;
   }
 
   void clear_cached_info (void) const
   {
-    delete typ; typ = nullptr;
-    delete idx_cache; idx_cache = nullptr;
+    delete m_typ; m_typ = nullptr;
+    delete m_idx_cache; m_idx_cache = nullptr;
   }
 
-  mutable MatrixType *typ;
-  mutable octave::idx_vector *idx_cache;
+  mutable MatrixType *m_typ;
+  mutable octave::idx_vector *m_idx_cache;
 
 private:
 
--- a/libinterp/octave-value/ov-base.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-base.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -98,8 +98,7 @@
 DEFINE_OV_TYPEID_FUNCTIONS_AND_DATA (octave_base_value,
                                      "<unknown type>", "unknown");
 
-// TRUE means to perform automatic sparse to real mutation if there
-// is memory to be saved
+// DEPRECATED in Octave 8.
 bool Vsparse_auto_mutate = false;
 
 octave_base_value *
@@ -1239,8 +1238,7 @@
   int t_lhs = type_id ();
   int t_rhs = rhs.type_id ();
 
-  octave::type_info& ti
-    = octave::__get_type_info__ ("octave_base_value::numeric_assign");
+  octave::type_info& ti = octave::__get_type_info__ ();
 
   octave::type_info::assign_op_fcn f
     = ti.lookup_assign_op (octave_value::op_asn_eq, t_lhs, t_rhs);
@@ -1363,7 +1361,7 @@
 void
 octave_base_value::indent (std::ostream& os) const
 {
-  assert (s_curr_print_indent_level >= 0);
+  panic_unless (s_curr_print_indent_level >= 0);
 
   if (s_beginning_of_line)
     {
@@ -1518,8 +1516,7 @@
 bool
 called_from_builtin (void)
 {
-  octave::tree_evaluator& tw
-    = octave::__get_evaluator__ ("called_from_builtin");
+  octave::tree_evaluator& tw = octave::__get_evaluator__ ();
 
   octave_function *fcn = tw.caller_function ();
 
@@ -1555,49 +1552,4 @@
   INSTALL_WIDENOP_TI (ti, octave_base_value, octave_cell, cell_conv);
 }
 
-DEFUN (sparse_auto_mutate, args, nargout,
-       doc: /* -*- texinfo -*-
-@deftypefn  {} {@var{val} =} sparse_auto_mutate ()
-@deftypefnx {} {@var{old_val} =} sparse_auto_mutate (@var{new_val})
-@deftypefnx {} {} sparse_auto_mutate (@var{new_val}, "local")
-Query or set the internal variable that controls whether Octave will
-automatically mutate sparse matrices to full matrices to save memory.
-
-For example:
-
-@example
-@group
-s = speye (3);
-sparse_auto_mutate (false);
-s(:, 1) = 1;
-typeinfo (s)
-@result{} sparse matrix
-sparse_auto_mutate (true);
-s(1, :) = 1;
-typeinfo (s)
-@result{} matrix
-@end group
-@end example
-
-When called from inside a function with the @qcode{"local"} option, the
-variable is changed locally for the function and any subroutines it calls.
-The original variable value is restored when exiting the function.
-@end deftypefn */)
-{
-  return set_internal_variable (Vsparse_auto_mutate, args, nargout,
-                                "sparse_auto_mutate");
-}
-
-/*
-%!test
-%! s = speye (3);
-%! sparse_auto_mutate (false);
-%! s(:, 1) = 1;
-%! assert (typeinfo (s), "sparse matrix");
-%! sparse_auto_mutate (true);
-%! s(1, :) = 1;
-%! assert (typeinfo (s), "matrix");
-%! sparse_auto_mutate (false);
-*/
-
 OCTAVE_NAMESPACE_END
--- a/libinterp/octave-value/ov-base.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-base.h	Mon Aug 29 13:58:00 2022 +0200
@@ -51,9 +51,16 @@
 
   // FIXME: This is not ideal, but it avoids including
   // interpreter-private.h here and bringing in a lot of unnecessary
-  // symbols that require even more header files.
+  // symbols that require even more header files.  Since the typeinfo
+  // object is required to load a user-defined octave_value object,
+  // maybe this function should be declared in a public header file?
 
-  extern OCTINTERP_API type_info& __get_type_info__ (const std::string&);
+  extern OCTINTERP_API type_info& __get_type_info__ (void);
+
+  // For now just preserve the old interface and don't mark it as deprecated.
+  // This function is currently an internal, private function.  Additional
+  // changes may be made before version 8 is finally released.
+  inline type_info& __get_type_info__ (const std::string&) { return __get_type_info__ (); }
 }
 
 class Cell;
@@ -205,8 +212,7 @@
   tspec const std::string t::c_name (c);                                \
   tspec void t::register_type (void)                                    \
   {                                                                     \
-    octave::type_info& type_info                                        \
-      = octave::__get_type_info__ (#t "::register_type");               \
+    octave::type_info& type_info = octave::__get_type_info__ ();        \
                                                                         \
     register_type (type_info);                                          \
   }                                                                     \
@@ -302,7 +308,8 @@
   virtual octave_value as_uint32 (void) const;
   virtual octave_value as_uint64 (void) const;
 
-  virtual octave_base_value * try_narrowing_conversion (void) { return nullptr; }
+  virtual octave_base_value * try_narrowing_conversion (void)
+  { return nullptr; }
 
   virtual void maybe_economize (void) { }
 
@@ -942,8 +949,7 @@
   octave::auto_shlib m_containing_dynamic_library;
 };
 
-// TRUE means to perform automatic sparse to real mutation if there
-// is memory to be saved
+OCTAVE_DEPRECATED (8, "Vsparse_auto_mutate is obsolete and is now always false")
 extern OCTINTERP_API bool Vsparse_auto_mutate;
 
 // Utility function to convert C++ arguments used in subsref/subsasgn into an
--- a/libinterp/octave-value/ov-bool-mat.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-bool-mat.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -90,9 +90,9 @@
 {
   octave_base_value *retval = nullptr;
 
-  if (matrix.ndims () == 2)
+  if (m_matrix.ndims () == 2)
     {
-      boolMatrix bm (matrix);
+      boolMatrix bm (m_matrix);
 
       octave_idx_type nr = bm.rows ();
       octave_idx_type nc = bm.cols ();
@@ -113,7 +113,7 @@
   warn_implicit_conversion ("Octave:array-to-scalar",
                             "bool matrix", "real scalar");
 
-  return matrix(0, 0);
+  return m_matrix(0, 0);
 }
 
 float
@@ -125,7 +125,7 @@
   warn_implicit_conversion ("Octave:array-to-scalar",
                             "bool matrix", "real scalar");
 
-  return matrix(0, 0);
+  return m_matrix(0, 0);
 }
 
 Complex
@@ -137,7 +137,7 @@
   warn_implicit_conversion ("Octave:array-to-scalar",
                             "bool matrix", "complex scalar");
 
-  return Complex (matrix(0, 0), 0);
+  return Complex (m_matrix(0, 0), 0);
 }
 
 FloatComplex
@@ -153,7 +153,7 @@
   warn_implicit_conversion ("Octave:array-to-scalar",
                             "bool matrix", "complex scalar");
 
-  retval = matrix(0, 0);
+  retval = m_matrix(0, 0);
 
   return retval;
 }
@@ -169,68 +169,68 @@
 octave_value
 octave_bool_matrix::as_double (void) const
 {
-  return NDArray (matrix);
+  return NDArray (m_matrix);
 }
 
 octave_value
 octave_bool_matrix::as_single (void) const
 {
-  return FloatNDArray (matrix);
+  return FloatNDArray (m_matrix);
 }
 
 octave_value
 octave_bool_matrix::as_int8 (void) const
 {
-  return int8NDArray (matrix);
+  return int8NDArray (m_matrix);
 }
 
 octave_value
 octave_bool_matrix::as_int16 (void) const
 {
-  return int16NDArray (matrix);
+  return int16NDArray (m_matrix);
 }
 
 octave_value
 octave_bool_matrix::as_int32 (void) const
 {
-  return int32NDArray (matrix);
+  return int32NDArray (m_matrix);
 }
 
 octave_value
 octave_bool_matrix::as_int64 (void) const
 {
-  return int64NDArray (matrix);
+  return int64NDArray (m_matrix);
 }
 
 octave_value
 octave_bool_matrix::as_uint8 (void) const
 {
-  return uint8NDArray (matrix);
+  return uint8NDArray (m_matrix);
 }
 
 octave_value
 octave_bool_matrix::as_uint16 (void) const
 {
-  return uint16NDArray (matrix);
+  return uint16NDArray (m_matrix);
 }
 
 octave_value
 octave_bool_matrix::as_uint32 (void) const
 {
-  return uint32NDArray (matrix);
+  return uint32NDArray (m_matrix);
 }
 
 octave_value
 octave_bool_matrix::as_uint64 (void) const
 {
-  return uint64NDArray (matrix);
+  return uint64NDArray (m_matrix);
 }
 
 void
 octave_bool_matrix::print_raw (std::ostream& os,
                                bool pr_as_read_syntax) const
 {
-  octave_print_internal (os, matrix, pr_as_read_syntax,
+  octave_print_internal (os, m_matrix, pr_as_read_syntax,
                          current_print_indent_level ());
 }
 
@@ -296,7 +296,7 @@
       boolNDArray btmp (dv);
 
       if (btmp.isempty ())
-        matrix = btmp;
+        m_matrix = btmp;
       else
         {
           NDArray tmp(dv);
@@ -308,7 +308,7 @@
           for (octave_idx_type i = 0; i < btmp.numel (); i++)
             btmp.elem (i) = (tmp.elem (i) != 0.);
 
-          matrix = btmp;
+          m_matrix = btmp;
         }
     }
   else if (kw == "rows")
@@ -331,10 +331,10 @@
             for (octave_idx_type i = 0; i < nr; i++)
               btmp.elem (i, j) = (tmp.elem (i, j) != 0.);
 
-          matrix = btmp;
+          m_matrix = btmp;
         }
       else if (nr == 0 || nc == 0)
-        matrix = boolMatrix (nr, nc);
+        m_matrix = boolMatrix (nr, nc);
       else
         panic_impossible ();
     }
@@ -423,7 +423,7 @@
   bool *mtmp = m.fortran_vec ();
   for (octave_idx_type i = 0; i < nel; i++)
     mtmp[i] = (htmp[i] ? 1 : 0);
-  matrix = m;
+  m_matrix = m;
 
   return true;
 }
@@ -456,7 +456,8 @@
   if (space_hid < 0) return false;
 #if defined (HAVE_HDF5_18)
   data_hid = H5Dcreate (loc_id, name, H5T_NATIVE_HBOOL, space_hid,
-                        octave_H5P_DEFAULT, octave_H5P_DEFAULT, octave_H5P_DEFAULT);
+                        octave_H5P_DEFAULT, octave_H5P_DEFAULT,
+                        octave_H5P_DEFAULT);
 #else
   data_hid = H5Dcreate (loc_id, name, H5T_NATIVE_HBOOL, space_hid,
                         octave_H5P_DEFAULT);
@@ -500,7 +501,7 @@
   dim_vector dv;
   int empty = load_hdf5_empty (loc_id, name, dv);
   if (empty > 0)
-    matrix.resize (dv);
+    m_matrix.resize (dv);
   if (empty)
     return (empty > 0);
 
@@ -550,7 +551,7 @@
       for (octave_idx_type i = 0; i < nel; i++)
         btmp.elem (i) = htmp[i];
 
-      matrix = btmp;
+      m_matrix = btmp;
     }
 
   H5Dclose (data_hid);
@@ -574,7 +575,7 @@
 
   mwSize nel = numel ();
 
-  const bool *pdata = matrix.data ();
+  const bool *pdata = m_matrix.data ();
 
   for (mwIndex i = 0; i < nel; i++)
     pd[i] = pdata[i];
@@ -586,15 +587,14 @@
 
 DEFUN (logical, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} logical (@var{x})
+@deftypefn {} {@var{TF} =} logical (@var{x})
 Convert the numeric object @var{x} to logical type.
 
 Any nonzero values will be converted to true (1) while zero values will be
-converted to false (0).  The non-numeric value NaN cannot be converted and
-will produce an error.
+converted to false (0).  The non-numeric value NaN cannot be converted and will
+produce an error.
 
-Compatibility Note: Octave accepts complex values as input, whereas
-@sc{matlab} issues an error.
+Compatibility Note: Octave accepts complex values as input, whereas @sc{matlab} issues an error.
 @seealso{double, single, char}
 @end deftypefn */)
 {
--- a/libinterp/octave-value/ov-bool-mat.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-bool-mat.h	Mon Aug 29 13:58:00 2022 +0200
@@ -91,7 +91,8 @@
 
   octave::idx_vector index_vector (bool /* require_integers */ = false) const
   {
-    return idx_cache ? *idx_cache : set_idx_cache (octave::idx_vector (matrix));
+    return m_idx_cache ? *m_idx_cache
+                       : set_idx_cache (octave::idx_vector (m_matrix));
   }
 
   builtin_type_t builtin_type (void) const { return btyp_bool; }
@@ -105,28 +106,28 @@
   bool isnumeric (void) const { return false; }
 
   int8NDArray
-  int8_array_value (void) const { return int8NDArray (matrix); }
+  int8_array_value (void) const { return int8NDArray (m_matrix); }
 
   int16NDArray
-  int16_array_value (void) const { return int16NDArray (matrix); }
+  int16_array_value (void) const { return int16NDArray (m_matrix); }
 
   int32NDArray
-  int32_array_value (void) const { return int32NDArray (matrix); }
+  int32_array_value (void) const { return int32NDArray (m_matrix); }
 
   int64NDArray
-  int64_array_value (void) const { return int64NDArray (matrix); }
+  int64_array_value (void) const { return int64NDArray (m_matrix); }
 
   uint8NDArray
-  uint8_array_value (void) const { return uint8NDArray (matrix); }
+  uint8_array_value (void) const { return uint8NDArray (m_matrix); }
 
   uint16NDArray
-  uint16_array_value (void) const { return uint16NDArray (matrix); }
+  uint16_array_value (void) const { return uint16NDArray (m_matrix); }
 
   uint32NDArray
-  uint32_array_value (void) const { return uint32NDArray (matrix); }
+  uint32_array_value (void) const { return uint32NDArray (m_matrix); }
 
   uint64NDArray
-  uint64_array_value (void) const { return uint64NDArray (matrix); }
+  uint64_array_value (void) const { return uint64NDArray (m_matrix); }
 
   double double_value (bool = false) const;
 
@@ -136,32 +137,32 @@
   { return double_value (frc_str_conv); }
 
   Matrix matrix_value (bool = false) const
-  { return Matrix (boolMatrix (matrix)); }
+  { return Matrix (boolMatrix (m_matrix)); }
 
   FloatMatrix float_matrix_value (bool = false) const
-  { return FloatMatrix (boolMatrix (matrix)); }
+  { return FloatMatrix (boolMatrix (m_matrix)); }
 
   NDArray array_value (bool = false) const
-  { return NDArray (matrix); }
+  { return NDArray (m_matrix); }
 
   FloatNDArray float_array_value (bool = false) const
-  { return FloatNDArray (matrix); }
+  { return FloatNDArray (m_matrix); }
 
   Complex complex_value (bool = false) const;
 
   FloatComplex float_complex_value (bool = false) const;
 
   ComplexMatrix complex_matrix_value (bool = false) const
-  { return ComplexMatrix (boolMatrix (matrix)); }
+  { return ComplexMatrix (boolMatrix (m_matrix)); }
 
   FloatComplexMatrix float_complex_matrix_value (bool = false) const
-  { return FloatComplexMatrix (boolMatrix (matrix)); }
+  { return FloatComplexMatrix (boolMatrix (m_matrix)); }
 
   ComplexNDArray complex_array_value (bool = false) const
-  { return ComplexNDArray (matrix); }
+  { return ComplexNDArray (m_matrix); }
 
   FloatComplexNDArray float_complex_array_value (bool = false) const
-  { return FloatComplexNDArray (matrix); }
+  { return FloatComplexNDArray (m_matrix); }
 
   charNDArray
   char_array_value (bool = false) const
@@ -171,25 +172,25 @@
     octave_idx_type nel = numel ();
 
     for (octave_idx_type i = 0; i < nel; i++)
-      retval(i) = static_cast<char> (matrix(i));
+      retval(i) = static_cast<char> (m_matrix(i));
 
     return retval;
   }
 
   boolMatrix bool_matrix_value (bool = false) const
-  { return boolMatrix (matrix); }
+  { return boolMatrix (m_matrix); }
 
   boolNDArray bool_array_value (bool = false) const
-  { return matrix; }
+  { return m_matrix; }
 
   SparseMatrix sparse_matrix_value (bool = false) const
-  { return SparseMatrix (Matrix (boolMatrix (matrix))); }
+  { return SparseMatrix (Matrix (boolMatrix (m_matrix))); }
 
   SparseComplexMatrix sparse_complex_matrix_value (bool = false) const
-  { return SparseComplexMatrix (ComplexMatrix (boolMatrix (matrix))); }
+  { return SparseComplexMatrix (ComplexMatrix (boolMatrix (m_matrix))); }
 
   SparseBoolMatrix sparse_bool_matrix_value (bool = false) const
-  { return SparseBoolMatrix (boolMatrix (matrix)); }
+  { return SparseBoolMatrix (boolMatrix (m_matrix)); }
 
   octave_value convert_to_str_internal (bool pad, bool force, char type) const;
 
@@ -227,7 +228,7 @@
   int write (octave::stream& os, int block_size,
              oct_data_conv::data_type output_type, int skip,
              octave::mach_info::float_format flt_fmt) const
-  { return os.write (matrix, block_size, output_type, skip, flt_fmt); }
+  { return os.write (m_matrix, block_size, output_type, skip, flt_fmt); }
 
   mxArray * as_mxArray (bool interleaved) const;
 
--- a/libinterp/octave-value/ov-bool-sparse.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-bool-sparse.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -73,32 +73,6 @@
                                             octave_sparse_matrix::static_type_id ());
 }
 
-octave_base_value *
-octave_sparse_bool_matrix::try_narrowing_conversion (void)
-{
-  octave_base_value *retval = nullptr;
-
-  if (Vsparse_auto_mutate)
-    {
-      // Don't use numel, since it can overflow for very large matrices
-      // Note that for the second test, this means it becomes approximative
-      // since it involves a cast to double to avoid issues of overflow
-      if (matrix.rows () == 1 && matrix.cols () == 1)
-        {
-          // Const copy of the matrix, so the right version of () operator used
-          const SparseBoolMatrix tmp (matrix);
-
-          retval = new octave_bool (tmp (0));
-        }
-      else if (matrix.cols () > 0 && matrix.rows () > 0
-               && (double (matrix.byte_size ()) > double (matrix.rows ())
-                   * double (matrix.cols ()) * sizeof (bool)))
-        retval = new octave_bool_matrix (matrix.matrix_value ());
-    }
-
-  return retval;
-}
-
 double
 octave_sparse_bool_matrix::double_value (bool) const
 {
--- a/libinterp/octave-value/ov-bool-sparse.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-bool-sparse.h	Mon Aug 29 13:58:00 2022 +0200
@@ -84,8 +84,6 @@
 
   type_conv_info numeric_conversion_function (void) const;
 
-  octave_base_value * try_narrowing_conversion (void);
-
   // FIXME: Adapt idx_vector to allow sparse logical indexing without overflow!
   octave::idx_vector index_vector (bool /* require_integers */ = false) const
   {
--- a/libinterp/octave-value/ov-bool.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-bool.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -241,7 +241,8 @@
   if (space_hid < 0) return false;
 #if defined (HAVE_HDF5_18)
   data_hid = H5Dcreate (loc_id, name, H5T_NATIVE_DOUBLE, space_hid,
-                        octave_H5P_DEFAULT, octave_H5P_DEFAULT, octave_H5P_DEFAULT);
+                        octave_H5P_DEFAULT, octave_H5P_DEFAULT,
+                        octave_H5P_DEFAULT);
 #else
   data_hid = H5Dcreate (loc_id, name, H5T_NATIVE_DOUBLE, space_hid,
                         octave_H5P_DEFAULT);
@@ -253,8 +254,8 @@
     }
 
   double tmp = double_value ();
-  retval = H5Dwrite (data_hid, H5T_NATIVE_DOUBLE, octave_H5S_ALL, octave_H5S_ALL,
-                     octave_H5P_DEFAULT, &tmp) >= 0;
+  retval = H5Dwrite (data_hid, H5T_NATIVE_DOUBLE, octave_H5S_ALL,
+                     octave_H5S_ALL, octave_H5P_DEFAULT, &tmp) >= 0;
 
   H5Dclose (data_hid);
   H5Sclose (space_hid);
--- a/libinterp/octave-value/ov-builtin.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-builtin.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -46,45 +46,7 @@
 octave_builtin::execute (octave::tree_evaluator& tw, int nargout,
                          const octave_value_list& args)
 {
-  octave_value_list retval;
-
-  if (args.has_magic_colon ())
-    error ("invalid use of colon in function argument list");
-
-  octave::profiler& profiler = tw.get_profiler ();
-
-  octave::profiler::enter<octave_builtin> block (profiler, *this);
-
-  if (m_fcn)
-    retval = (*m_fcn) (args, nargout);
-  else
-    {
-      octave::interpreter& interp
-        = octave::__get_interpreter__ ("octave_builtin::call");
-
-      retval = (*m_meth) (interp, args, nargout);
-    }
-
-  // Do not allow null values to be returned from functions.
-  // FIXME: perhaps true builtins should be allowed?
-
-  retval.make_storable_values ();
-
-  // Fix the case of a single undefined value.
-  // This happens when a compiled function uses
-  //
-  //   octave_value retval;
-  //
-  // instead of
-  //
-  //   octave_value_list retval;
-  //
-  // the idiom is very common, so we solve that here.
-
-  if (retval.length () == 1 && retval.xelem (0).is_undefined ())
-    retval.clear ();
-
-  return retval;
+  return tw.execute_builtin_function (*this, nargout, args);
 }
 
 octave_builtin::fcn
--- a/libinterp/octave-value/ov-cell.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-cell.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -70,14 +70,14 @@
 octave_base_matrix<Cell>::do_index_op (const octave_value_list& idx,
                                        bool resize_ok)
 {
-  return matrix.index (idx, resize_ok);
+  return m_matrix.index (idx, resize_ok);
 }
 
 template <>
 void
 octave_base_matrix<Cell>::assign (const octave_value_list& idx, const Cell& rhs)
 {
-  matrix.assign (idx, rhs);
+  m_matrix.assign (idx, rhs);
 }
 
 template <>
@@ -87,16 +87,16 @@
 {
   // FIXME: Really?
   if (rhs.iscell ())
-    matrix.assign (idx, rhs.cell_value ());
+    m_matrix.assign (idx, rhs.cell_value ());
   else
-    matrix.assign (idx, Cell (rhs));
+    m_matrix.assign (idx, Cell (rhs));
 }
 
 template <>
 void
 octave_base_matrix<Cell>::delete_elements (const octave_value_list& idx)
 {
-  matrix.delete_elements (idx);
+  m_matrix.delete_elements (idx);
 }
 
 // FIXME: this list of specializations is becoming so long that we should
@@ -108,7 +108,7 @@
                                         octave_idx_type i,
                                         octave_idx_type j) const
 {
-  octave_value val = matrix(i, j);
+  octave_value val = m_matrix(i, j);
 
   std::string tname = val.type_name ();
   dim_vector dv = val.dims ();
@@ -120,8 +120,8 @@
 octave_value
 octave_base_matrix<Cell>::fast_elem_extract (octave_idx_type n) const
 {
-  if (n < matrix.numel ())
-    return Cell (matrix(n));
+  if (n < m_matrix.numel ())
+    return Cell (m_matrix(n));
   else
     return octave_value ();
 }
@@ -133,9 +133,9 @@
 {
   const octave_cell *xrep = dynamic_cast<const octave_cell *> (&x.get_rep ());
 
-  bool retval = xrep && xrep->matrix.numel () == 1 && n < matrix.numel ();
+  bool retval = xrep && xrep->m_matrix.numel () == 1 && n < m_matrix.numel ();
   if (retval)
-    matrix(n) = xrep->matrix(0);
+    m_matrix(n) = xrep->m_matrix(0);
 
   return retval;
 }
@@ -146,8 +146,8 @@
 
 void octave_cell::break_closure_cycles (const std::shared_ptr<octave::stack_frame>& frame)
 {
-  for (octave_idx_type i = 0; i < matrix.numel (); i++)
-    matrix(i).break_closure_cycles (frame);
+  for (octave_idx_type i = 0; i < m_matrix.numel (); i++)
+    m_matrix(i).break_closure_cycles (frame);
 }
 
 octave_value_list
@@ -306,8 +306,8 @@
 
         case '{':
           {
-            matrix.make_unique ();
-            Cell tmpc = matrix.index (idx.front (), true);
+            m_matrix.make_unique ();
+            Cell tmpc = m_matrix.index (idx.front (), true);
 
             std::list<octave_value_list> next_idx (idx);
 
@@ -435,7 +435,7 @@
     retval = true;
   else
     {
-      retval = matrix.iscellstr ();
+      retval = m_matrix.iscellstr ();
       // Allocate empty cache to mark that this is indeed a cellstr.
       if (retval)
         m_cellstr_cache.reset (new Array<std::string> ());
@@ -471,7 +471,7 @@
   std::size_t retval = 0;
 
   for (octave_idx_type i = 0; i < numel (); i++)
-    retval += matrix(i).byte_size ();
+    retval += m_matrix(i).byte_size ();
 
   return retval;
 }
@@ -567,7 +567,7 @@
 octave_value_list
 octave_cell::list_value (void) const
 {
-  return octave_value_list (matrix);
+  return octave_value_list (m_matrix);
 }
 
 string_vector
@@ -585,7 +585,7 @@
 
   for (octave_idx_type i = 0; i < nel; i++)
     {
-      string_vector s = matrix(i).string_vector_value ();
+      string_vector s = m_matrix(i).string_vector_value ();
 
       octave_idx_type s_len = s.numel ();
 
@@ -639,7 +639,7 @@
     error ("invalid conversion from cell array to array of strings");
 
   if (m_cellstr_cache->isempty ())
-    *m_cellstr_cache = matrix.cellstr_value ();
+    *m_cellstr_cache = m_matrix.cellstr_value ();
 
   return *m_cellstr_cache;
 }
@@ -659,7 +659,7 @@
 void
 octave_cell::print_raw (std::ostream& os, bool) const
 {
-  int nd = matrix.ndims ();
+  int nd = m_matrix.ndims ();
 
   if (nd == 2)
     {
@@ -683,7 +683,7 @@
                   std::ostringstream buf;
                   buf << '[' << i+1 << ',' << j+1 << ']';
 
-                  octave_value val = matrix(i, j);
+                  octave_value val = m_matrix(i, j);
 
                   val.print_with_name (os, buf.str ());
                 }
@@ -707,7 +707,7 @@
   else
     {
       indent (os);
-      dim_vector dv = matrix.dims ();
+      dim_vector dv = m_matrix.dims ();
       os << '{' << dv.str () << " Cell Array}";
       newline (os);
     }
@@ -735,7 +735,7 @@
 void
 octave_cell::short_disp (std::ostream& os) const
 {
-  os << (matrix.isempty () ? "{}" : "...");
+  os << (m_matrix.isempty () ? "{}" : "...");
 }
 
 #define CELL_ELT_TAG "<cell-element>"
@@ -844,7 +844,7 @@
       if (! is)
         error ("load: failed to load matrix constant");
 
-      matrix = tmp;
+      m_matrix = tmp;
     }
   else if (kw == "rows")
     {
@@ -880,10 +880,10 @@
           if (! is)
             error ("load: failed to load cell element");
 
-          matrix = tmp;
+          m_matrix = tmp;
         }
       else if (nr == 0 || nc == 0)
-        matrix = Cell (nr, nc);
+        m_matrix = Cell (nr, nc);
       else
         panic_impossible ();
     }
@@ -989,7 +989,7 @@
   if (! is)
     error ("load: failed to load matrix constant");
 
-  matrix = tmp;
+  m_matrix = tmp;
 
   return true;
 }
@@ -998,7 +998,7 @@
 octave_cell::mex_get_data (void) const
 {
   clear_cellstr_cache ();
-  return matrix.data ();
+  return m_matrix.data ();
 }
 
 bool
@@ -1045,7 +1045,8 @@
 
 #if defined (HAVE_HDF5_18)
   size_hid = H5Dcreate (data_hid, "dims", H5T_NATIVE_IDX, space_hid,
-                        octave_H5P_DEFAULT, octave_H5P_DEFAULT, octave_H5P_DEFAULT);
+                        octave_H5P_DEFAULT, octave_H5P_DEFAULT,
+                        octave_H5P_DEFAULT);
 #else
   size_hid = H5Dcreate (data_hid, "dims", H5T_NATIVE_IDX, space_hid,
                         octave_H5P_DEFAULT);
@@ -1118,7 +1119,7 @@
   dim_vector dv;
   int empty = load_hdf5_empty (loc_id, name, dv);
   if (empty > 0)
-    matrix.resize (dv);
+    m_matrix.resize (dv);
   if (empty)
     return (empty > 0);
 
@@ -1205,7 +1206,7 @@
 
   if (retval2 >= 0)
     {
-      matrix = m;
+      m_matrix = m;
       retval = true;
     }
 
@@ -1223,7 +1224,7 @@
 
 DEFUN (iscell, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} iscell (@var{x})
+@deftypefn {} {@var{tf} =} iscell (@var{x})
 Return true if @var{x} is a cell array object.
 @seealso{ismatrix, isstruct, iscellstr, isa}
 @end deftypefn */)
@@ -1236,10 +1237,10 @@
 
 DEFUN (cell, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} cell (@var{n})
-@deftypefnx {} {} cell (@var{m}, @var{n})
-@deftypefnx {} {} cell (@var{m}, @var{n}, @var{k}, @dots{})
-@deftypefnx {} {} cell ([@var{m} @var{n} @dots{}])
+@deftypefn  {} {@var{C} =} cell (@var{n})
+@deftypefnx {} {@var{C} =} cell (@var{m}, @var{n})
+@deftypefnx {} {@var{C} =} cell (@var{m}, @var{n}, @var{k}, @dots{})
+@deftypefnx {} {@var{C} =} cell ([@var{m} @var{n} @dots{}])
 Create a new cell array object.
 
 If invoked with a single scalar integer argument, return a square
@@ -1289,7 +1290,7 @@
 
 DEFUN (iscellstr, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} iscellstr (@var{cell})
+@deftypefn {} {@var{tf} =} iscellstr (@var{cell})
 Return true if every element of the cell array @var{cell} is a character
 string.
 @seealso{ischar, isstring}
@@ -1425,7 +1426,7 @@
 
   mwSize nel = numel ();
 
-  const octave_value *p = matrix.data ();
+  const octave_value *p = m_matrix.data ();
 
   for (mwIndex i = 0; i < nel; i++)
     elts[i] = new mxArray (interleaved, p[i]);
@@ -1440,7 +1441,7 @@
     {
 #define FORWARD_MAPPER(UMAP)                  \
     case umap_ ## UMAP:                       \
-      return matrix.UMAP ()
+      return m_matrix.UMAP ()
 
     FORWARD_MAPPER (xisalnum);
     FORWARD_MAPPER (xisalpha);
--- a/libinterp/octave-value/ov-cell.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-cell.h	Mon Aug 29 13:58:00 2022 +0200
@@ -136,7 +136,7 @@
 
   bool is_true (void) const;
 
-  Cell cell_value (void) const { return matrix; }
+  Cell cell_value (void) const { return m_matrix; }
 
   octave_value_list list_value (void) const;
 
--- a/libinterp/octave-value/ov-ch-mat.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-ch-mat.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -60,7 +60,7 @@
 octave::idx_vector
 octave_char_matrix::index_vector (bool /* require_integers */) const
 {
-  const char *p = matrix.data ();
+  const char *p = m_matrix.data ();
   if (numel () == 1 && *p == ':')
     return octave::idx_vector (':');
   else
@@ -76,7 +76,7 @@
   warn_implicit_conversion ("Octave:array-to-scalar",
                             "character matrix", "real scalar");
 
-  return static_cast<unsigned char> (matrix(0, 0));
+  return static_cast<unsigned char> (m_matrix(0, 0));
 }
 
 float
@@ -88,7 +88,7 @@
   warn_implicit_conversion ("Octave:array-to-scalar",
                             "character matrix", "real scalar");
 
-  return static_cast<unsigned char> (matrix(0, 0));
+  return static_cast<unsigned char> (m_matrix(0, 0));
 }
 
 octave_int64
@@ -102,7 +102,7 @@
   warn_implicit_conversion ("Octave:array-to-scalar",
                             "character matrix", "int64 scalar");
 
-  retval = octave_int64 (matrix(0, 0));
+  retval = octave_int64 (m_matrix(0, 0));
 
   return retval;
 }
@@ -118,7 +118,7 @@
   warn_implicit_conversion ("Octave:array-to-scalar",
                             "character matrix", "uint64 scalar");
 
-  retval = octave_uint64 (matrix(0, 0));
+  retval = octave_uint64 (m_matrix(0, 0));
 
   return retval;
 }
@@ -132,7 +132,7 @@
   warn_implicit_conversion ("Octave:array-to-scalar",
                             "character matrix", "complex scalar");
 
-  return Complex (static_cast<unsigned char> (matrix(0, 0)), 0);
+  return Complex (static_cast<unsigned char> (m_matrix(0, 0)), 0);
 }
 
 FloatComplex
@@ -148,7 +148,7 @@
   warn_implicit_conversion ("Octave:array-to-scalar",
                             "character matrix", "complex scalar");
 
-  retval = static_cast<unsigned char> (matrix(0, 0));
+  retval = static_cast<unsigned char> (m_matrix(0, 0));
 
   return retval;
 }
@@ -156,68 +156,68 @@
 octave_value
 octave_char_matrix::as_double (void) const
 {
-  return NDArray (matrix);
+  return NDArray (m_matrix);
 }
 
 octave_value
 octave_char_matrix::as_single (void) const
 {
-  return FloatNDArray (matrix);
+  return FloatNDArray (m_matrix);
 }
 
 octave_value
 octave_char_matrix::as_int8 (void) const
 {
-  return int8NDArray (matrix);
+  return int8NDArray (m_matrix);
 }
 
 octave_value
 octave_char_matrix::as_int16 (void) const
 {
-  return int16NDArray (matrix);
+  return int16NDArray (m_matrix);
 }
 
 octave_value
 octave_char_matrix::as_int32 (void) const
 {
-  return int32NDArray (matrix);
+  return int32NDArray (m_matrix);
 }
 
 octave_value
 octave_char_matrix::as_int64 (void) const
 {
-  return int64NDArray (matrix);
+  return int64NDArray (m_matrix);
 }
 
 octave_value
 octave_char_matrix::as_uint8 (void) const
 {
-  return uint8NDArray (matrix);
+  return uint8NDArray (m_matrix);
 }
 
 octave_value
 octave_char_matrix::as_uint16 (void) const
 {
-  return uint16NDArray (matrix);
+  return uint16NDArray (m_matrix);
 }
 
 octave_value
 octave_char_matrix::as_uint32 (void) const
 {
-  return uint32NDArray (matrix);
+  return uint32NDArray (m_matrix);
 }
 
 octave_value
 octave_char_matrix::as_uint64 (void) const
 {
-  return uint64NDArray (matrix);
+  return uint64NDArray (m_matrix);
 }
 
 void
 octave_char_matrix::print_raw (std::ostream& os,
                                bool pr_as_read_syntax) const
 {
-  octave_print_internal (os, matrix, pr_as_read_syntax,
+  octave_print_internal (os, m_matrix, pr_as_read_syntax,
                          current_print_indent_level ());
 }
 
@@ -230,7 +230,7 @@
 
   mwSize nel = numel ();
 
-  const char *pdata = matrix.data ();
+  const char *pdata = m_matrix.data ();
 
   for (mwIndex i = 0; i < nel; i++)
     pd[i] = pdata[i];
@@ -261,22 +261,22 @@
     {
 #define STRING_MAPPER(UMAP,FCN,TYPE)                                  \
     case umap_ ## UMAP:                                               \
-      return octave_value (matrix.map<TYPE, int (&) (int)> (FCN))
+      return octave_value (m_matrix.map<TYPE, int (&) (int)> (FCN))
 
     STRING_MAPPER (xisascii, xisascii, bool);
 
 #define STRING_U8_MAPPER(UMAP,FCN)                                             \
     case umap_ ## UMAP:                                                        \
       {                                                                        \
-        charNDArray in_m = matrix;                                             \
-        Array<octave_idx_type> p (dim_vector (matrix.ndims (), 1));            \
-        if (matrix.ndims () > 1)                                               \
+        charNDArray in_m = m_matrix;                                           \
+        Array<octave_idx_type> p (dim_vector (m_matrix.ndims (), 1));          \
+        if (m_matrix.ndims () > 1)                                             \
           {                                                                    \
-            for (octave_idx_type i=0; i < matrix.ndims (); i++)                \
+            for (octave_idx_type i=0; i < m_matrix.ndims (); i++)              \
               p(i) = i;                                                        \
             p(0) = 1;                                                          \
             p(1) = 0;                                                          \
-            in_m = matrix.permute (p);                                         \
+            in_m = m_matrix.permute (p);                                       \
           }                                                                    \
         boolNDArray b_array = boolNDArray (in_m.dims ());                      \
         const uint8_t *in = reinterpret_cast<const uint8_t *> (in_m.data ());  \
@@ -291,8 +291,8 @@
             b_array(i+j) = is_upper;                                           \
           i += mblen;                                                          \
         }                                                                      \
-        return octave_value ((matrix.ndims () > 1) ? b_array.permute (p, true) \
-                                                   : b_array);                 \
+        return octave_value ((m_matrix.ndims () > 1) ? b_array.permute (p, true) \
+                                                     : b_array);               \
       }
 
     STRING_U8_MAPPER (xisalnum, octave_uc_is_alnum_wrapper);
@@ -310,29 +310,29 @@
 #define STRING_U8_FCN(UMAP,U8_FCN,STD_FCN)                                     \
     case umap_ ## UMAP:                                                        \
       {                                                                        \
-        charNDArray in_m = matrix;                                             \
-        Array<octave_idx_type> p (dim_vector (matrix.ndims (), 1));            \
-        if (matrix.ndims () > 1)                                               \
+        charNDArray in_m = m_matrix;                                           \
+        Array<octave_idx_type> p (dim_vector (m_matrix.ndims (), 1));          \
+        if (m_matrix.ndims () > 1)                                             \
           {                                                                    \
-            for (octave_idx_type i=0; i < matrix.ndims (); i++)                \
+            for (octave_idx_type i=0; i < m_matrix.ndims (); i++)              \
               p(i) = i;                                                        \
             p(0) = 1;                                                          \
             p(1) = 0;                                                          \
-            in_m = matrix.permute (p);                                         \
+            in_m = m_matrix.permute (p);                                       \
           }                                                                    \
-        std::size_t output_length = in_m.numel ();                                  \
+        std::size_t output_length = in_m.numel ();                             \
         charNDArray ch_array = charNDArray (in_m.dims ());                     \
         const uint8_t *in = reinterpret_cast<const uint8_t *> (in_m.data ());  \
         uint8_t *buf = reinterpret_cast<uint8_t *> (ch_array.fortran_vec ());  \
-        U8_FCN (in, matrix.numel (), nullptr, buf, &output_length);            \
-        if (output_length != static_cast<std::size_t> (matrix.numel ()))            \
+        U8_FCN (in, m_matrix.numel (), nullptr, buf, &output_length);          \
+        if (output_length != static_cast<std::size_t> (m_matrix.numel ()))     \
           {                                                                    \
             warning_with_id ("Octave:multi_byte_char_length",                  \
                              "UMAP: Possible multi-byte error.");              \
-            return octave_value (matrix.map<char, int (&) (int)> (STD_FCN));   \
+            return octave_value (m_matrix.map<char, int (&) (int)> (STD_FCN)); \
           }                                                                    \
-        return octave_value ((matrix.ndims () > 1) ? ch_array.permute (p, true)\
-                                                   : ch_array);                \
+        return octave_value ((m_matrix.ndims () > 1) ? ch_array.permute (p, true)\
+                                                     : ch_array);              \
       }
 
     STRING_U8_FCN (xtolower, octave_u8_tolower_wrapper, std::tolower);
--- a/libinterp/octave-value/ov-ch-mat.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-ch-mat.h	Mon Aug 29 13:58:00 2022 +0200
@@ -112,41 +112,41 @@
   octave_uint64 uint64_scalar_value () const;
 
   Matrix matrix_value (bool = false) const
-  { return Matrix (charMatrix (matrix)); }
+  { return Matrix (charMatrix (m_matrix)); }
 
   FloatMatrix float_matrix_value (bool = false) const
-  { return FloatMatrix (charMatrix (matrix)); }
+  { return FloatMatrix (charMatrix (m_matrix)); }
 
   NDArray array_value (bool = false) const
-  { return NDArray (matrix); }
+  { return NDArray (m_matrix); }
 
   FloatNDArray float_array_value (bool = false) const
-  { return FloatNDArray (matrix); }
+  { return FloatNDArray (m_matrix); }
 
   Complex complex_value (bool = false) const;
 
   FloatComplex float_complex_value (bool = false) const;
 
   ComplexMatrix complex_matrix_value (bool = false) const
-  { return ComplexMatrix (charMatrix (matrix)); }
+  { return ComplexMatrix (charMatrix (m_matrix)); }
 
   FloatComplexMatrix float_complex_matrix_value (bool = false) const
-  { return FloatComplexMatrix (charMatrix (matrix)); }
+  { return FloatComplexMatrix (charMatrix (m_matrix)); }
 
   ComplexNDArray complex_array_value (bool = false) const
-  { return ComplexNDArray (matrix); }
+  { return ComplexNDArray (m_matrix); }
 
   FloatComplexNDArray float_complex_array_value (bool = false) const
-  { return FloatComplexNDArray (matrix); }
+  { return FloatComplexNDArray (m_matrix); }
 
   charMatrix char_matrix_value (bool = false) const
-  { return charMatrix (matrix); }
+  { return charMatrix (m_matrix); }
 
   charNDArray char_array_value (bool = false) const
-  { return matrix; }
+  { return m_matrix; }
 
   octave_value convert_to_str_internal (bool, bool, char type) const
-  { return octave_value (matrix, type); }
+  { return octave_value (m_matrix, type); }
 
   octave_value as_double (void) const;
   octave_value as_single (void) const;
--- a/libinterp/octave-value/ov-class.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-class.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -200,7 +200,7 @@
         }
     }
 
-  octave::symbol_table& symtab = octave::__get_symbol_table__ ("octave_class");
+  octave::symbol_table& symtab = octave::__get_symbol_table__ ();
 
   symtab.add_to_parent_map (id, m_parent_list);
 }
@@ -231,8 +231,7 @@
 
   if (nparents () > 0)
     {
-      octave::tree_evaluator& tw
-        = octave::__get_evaluator__ ("octave_class::get_current_method_class");
+      octave::tree_evaluator& tw = octave::__get_evaluator__ ();
 
       octave_function *fcn = tw.current_function ();
 
@@ -281,7 +280,7 @@
 Cell
 octave_class::dotref (const octave_value_list& idx)
 {
-  assert (idx.length () == 1);
+  panic_if (idx.length () != 1);
 
   std::string method_class = get_current_method_class ();
 
@@ -313,8 +312,7 @@
 
   Matrix retval (1, 2, 1.0);
 
-  octave::symbol_table& symtab
-    = octave::__get_symbol_table__ ("octave_class::size");
+  octave::symbol_table& symtab = octave::__get_symbol_table__ ();
 
   octave_value meth = symtab.find_method ("size", class_name ());
 
@@ -354,8 +352,7 @@
   octave_idx_type retval = -1;
   const std::string cn = class_name ();
 
-  octave::symbol_table& symtab
-    = octave::__get_symbol_table__ ("octave_class::numel");
+  octave::symbol_table& symtab = octave::__get_symbol_table__ ();
 
   octave_value meth = symtab.find_method ("numel", cn);
 
@@ -450,8 +447,7 @@
     }
   else
     {
-      octave::symbol_table& symtab
-        = octave::__get_symbol_table__ ("octave_class::subsref");
+      octave::symbol_table& symtab = octave::__get_symbol_table__ ();
 
       octave_value meth = symtab.find_method ("subsref", class_name ());
 
@@ -551,8 +547,7 @@
 
   if (! (in_class_method () || called_from_builtin ()))
     {
-      octave::symbol_table& symtab
-        = octave::__get_symbol_table__ ("octave_class::subsasgn_common");
+      octave::symbol_table& symtab = octave::__get_symbol_table__ ();
 
       octave_value meth = symtab.find_method ("subsasgn", class_name ());
 
@@ -654,7 +649,7 @@
 
                 octave_value_list key_idx = *++p;
 
-                assert (key_idx.length () == 1);
+                panic_if (key_idx.length () != 1);
 
                 std::string key = key_idx(0).xstring_value ("invalid index for class assignment");
 
@@ -692,7 +687,7 @@
           {
             octave_value_list key_idx = idx.front ();
 
-            assert (key_idx.length () == 1);
+            panic_if (key_idx.length () != 1);
 
             std::string key = key_idx(0).string_value ();
 
@@ -747,7 +742,7 @@
             auto p = idx.begin ();
             octave_value_list key_idx = *++p;
 
-            assert (key_idx.length () == 1);
+            panic_if (key_idx.length () != 1);
 
             std::string key = key_idx(0).xstring_value ("assignment to class element failed");
 
@@ -785,7 +780,7 @@
       {
         octave_value_list key_idx = idx.front ();
 
-        assert (key_idx.length () == 1);
+        panic_if (key_idx.length () != 1);
 
         std::string key = key_idx(0).string_value ();
 
@@ -828,8 +823,7 @@
 octave::idx_vector
 octave_class::index_vector (bool require_integers) const
 {
-  octave::symbol_table& symtab
-    = octave::__get_symbol_table__ ("octave_class::index_vector");
+  octave::symbol_table& symtab = octave::__get_symbol_table__ ();
 
   octave_value meth = symtab.find_method ("subsindex", class_name ());
 
@@ -877,8 +871,7 @@
 {
   bool retval = false;
 
-  octave::symbol_table& symtab
-    = octave::__get_symbol_table__ ("octave_class::is_true");
+  octave::symbol_table& symtab = octave::__get_symbol_table__ ();
 
   octave_value meth = symtab.find_method ("logical", class_name ());
 
@@ -996,8 +989,7 @@
 {
   string_vector retval;
 
-  octave::symbol_table& symtab
-    = octave::__get_symbol_table__ ("octave_class::string_vector_value");
+  octave::symbol_table& symtab = octave::__get_symbol_table__ ();
 
   octave_value meth = symtab.find_method ("char", class_name ());
 
@@ -1049,8 +1041,7 @@
     retval = true;
   else
     {
-      octave::interpreter& interp
-        = octave::__get_interpreter__  ("octave_class::reconstruct_exemplar");
+      octave::interpreter& interp = octave::__get_interpreter__ ();
 
       octave::symbol_table& symtab = interp.get_symbol_table ();
 
@@ -1068,7 +1059,7 @@
           // Something has gone terribly wrong if
           // symbol_table::find_method (c_name, c_name) does not return
           // a class constructor for the class c_name...
-          assert (have_ctor);
+          panic_unless (have_ctor);
         }
 
       if (have_ctor)
@@ -1174,7 +1165,7 @@
   os << "# classname: " << class_name () << "\n";
   octave_map m;
 
-  octave::load_path& lp = octave::__get_load_path__ ("octave_class::save_ascii");
+  octave::load_path& lp = octave::__get_load_path__ ();
 
   if (lp.find_method (class_name (), "saveobj") != "")
     {
@@ -1248,7 +1239,7 @@
       if (! reconstruct_parents ())
         warning ("load: unable to reconstruct object inheritance");
 
-      octave::load_path& lp = octave::__get_load_path__ ("octave_class::load_ascii");
+      octave::load_path& lp = octave::__get_load_path__ ();
 
       if (lp.find_method (classname, "loadobj") != "")
         {
@@ -1279,7 +1270,7 @@
 
   octave_map m;
 
-  octave::load_path& lp = octave::__get_load_path__ ("octave_class::save_binary");
+  octave::load_path& lp = octave::__get_load_path__ ();
 
   if (lp.find_method (class_name (), "saveobj") != "")
     {
@@ -1368,7 +1359,7 @@
           if (! reconstruct_parents ())
             warning ("load: unable to reconstruct object inheritance");
 
-          octave::load_path& lp = octave::__get_load_path__ ("octave_class::load_binary");
+          octave::load_path& lp = octave::__get_load_path__ ();
 
           if (lp.find_method (c_name, "loadobj") != "")
             {
@@ -1407,7 +1398,7 @@
   octave_map m;
   octave_map::iterator i;
 
-  octave::load_path& lp = octave::__get_load_path__ ("octave_class::save_hdf5");
+  octave::load_path& lp = octave::__get_load_path__ ();
 
 #if defined (HAVE_HDF5_18)
   group_hid = H5Gcreate (loc_id, name, octave_H5P_DEFAULT, octave_H5P_DEFAULT,
@@ -1617,7 +1608,7 @@
       if (! reconstruct_parents ())
         warning ("load: unable to reconstruct object inheritance");
 
-      octave::load_path& lp = octave::__get_load_path__ ("octave_class::load_hdf5");
+      octave::load_path& lp = octave::__get_load_path__ ();
 
       if (lp.find_method (c_name, "loadobj") != "")
         {
@@ -1655,8 +1646,7 @@
 bool
 octave_class::in_class_method (void)
 {
-  octave::tree_evaluator& tw
-    = octave::__get_evaluator__ ("octave_class::in_class_method");
+  octave::tree_evaluator& tw = octave::__get_evaluator__ ();
 
   octave_function *fcn = tw.current_function ();
 
@@ -1727,13 +1717,13 @@
 DEFMETHOD (class, interp, args, ,
            doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{classname} =} class (@var{obj})
-@deftypefnx {} {} class (@var{s}, @var{id})
-@deftypefnx {} {} class (@var{s}, @var{id}, @var{p}, @dots{})
-Return the class of the object @var{obj}, or create a class with
-fields from structure @var{s} and name (string) @var{id}.
-
-Additional arguments name a list of parent classes from which the new class
-is derived.
+@deftypefnx {} {@var{cls} =} class (@var{s}, @var{classname})
+@deftypefnx {} {@var{cls} =} class (@var{s}, @var{classname}, @var{parent1}, @dots{})
+Return the class of the object @var{obj}, or create a class with fields from
+structure @var{s} and name (string) @var{classname}.
+
+Additional arguments name a list of parent classes from which the new class is
+derived.
 @seealso{typeinfo, isa}
 @end deftypefn */)
 {
@@ -1802,7 +1792,7 @@
 
 DEFUN (isa, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} isa (@var{obj}, @var{classname})
+@deftypefn {} {@var{tf} =} isa (@var{obj}, @var{classname})
 Return true if @var{obj} is an object from the class @var{classname}.
 
 @var{classname} may also be one of the following class categories:
@@ -1911,7 +1901,7 @@
 
 DEFUN (__parent_classes__, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} __parent_classes__ (@var{x})
+@deftypefn {} {@var{Ccls} =} __parent_classes__ (@var{x})
 Undocumented internal function.
 @end deftypefn */)
 {
@@ -1928,7 +1918,7 @@
 
 DEFUN (isobject, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} isobject (@var{x})
+@deftypefn {} {@var{tf} =} isobject (@var{x})
 Return true if @var{x} is a class object.
 @seealso{class, typeinfo, isa, ismethod, isprop}
 @end deftypefn */)
@@ -2038,7 +2028,7 @@
                inf_class.c_str (), sup_class.c_str ());
     }
 
-  return octave_value();
+  return ovl ();
 }
 
 // The following classes allow us to define "inline" function objects as
@@ -2148,14 +2138,11 @@
 
 DEFUN (__inline_ctor__, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} __inline_ctor__ (@var{prop_struct})
-Internal function.
-
+@deftypefn {} {@var{inline_obj} =} __inline_ctor__ (@var{prop_struct})
 Implements final construction for inline objects.
 @end deftypefn */)
 {
   // Input validation has already been done in input.m.
-
   return octave_value (new octave_inline (args(0).map_value ()));
 }
 
--- a/libinterp/octave-value/ov-class.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-class.h	Mon Aug 29 13:58:00 2022 +0200
@@ -188,7 +188,8 @@
 
   OCTINTERP_API void print (std::ostream& os, bool pr_as_read_syntax = false);
 
-  OCTINTERP_API void print_raw (std::ostream& os, bool pr_as_read_syntax = false) const;
+  OCTINTERP_API void print_raw (std::ostream& os,
+                                bool pr_as_read_syntax = false) const;
 
   OCTINTERP_API bool reconstruct_exemplar (void);
 
--- a/libinterp/octave-value/ov-classdef.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-classdef.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -140,7 +140,8 @@
         }
     }
 
-  retval = m_object.subsref (type, idx, 1, skip, octave::cdef_class (), auto_add);
+  retval = m_object.subsref (type, idx, 1, skip,
+                             octave::cdef_class (), auto_add);
 
   if (type.length () > skip && idx.size () > skip)
     retval = retval(0).next_subsref (1, type, idx, skip);
@@ -254,7 +255,7 @@
 
           // Temporarily set lvalue list of current statement to NULL, to avoid
           // using that list for the execution of the method "numel"
-          octave::interpreter& interp = octave::__get_interpreter__ ("octave_classdef::xnumel");
+          octave::interpreter& interp = octave::__get_interpreter__ ();
           octave::tree_evaluator& tw = interp.get_evaluator();
 
           octave::unwind_action act ([&tw] (const std::list<octave::octave_lvalue> *lvl)
@@ -602,21 +603,21 @@
 
 DEFUN (__meta_get_package__, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} __meta_get_package__ ()
+@deftypefn {} {@var{pkg} =} __meta_get_package__ (@var{pkg_name})
 Undocumented internal function.
 @end deftypefn */)
 {
   if (args.length () != 1)
     print_usage ();
 
-  std::string cname = args(0).xstring_value ("PACKAGE_NAME must be a string");
+  std::string cname = args(0).xstring_value ("PKG_NAME must be a string");
 
   return to_ov (lookup_package (cname));
 }
 
 DEFUN (metaclass, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} metaclass (obj)
+@deftypefn {} {@var{metaclass_obj} =} metaclass (obj)
 Returns the meta.class object corresponding to the class of @var{obj}.
 @end deftypefn */)
 {
@@ -635,17 +636,17 @@
 
 DEFUN (properties, args, nargout,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} properties (@var{class_name})
-@deftypefnx {} {} properties (@var{obj})
-@deftypefnx {} {@var{plist} =} properties (@dots{})
-Return or display the public properties for the named class
-@var{class_name} or classdef object @var{obj}.
+@deftypefn  {} {} properties (@var{obj})
+@deftypefnx {} {} properties (@var{class_name})
+@deftypefnx {} {@var{proplist} =} properties (@dots{})
+Display or return the public properties for the classdef object @var{obj} or
+the named class @var{class_name}.
 
-If an output value is requested, return the list of property names in a
-cell array.
+If an output value is requested, return the list of property names in a cell
+array.
 
-Programming Note: Property names are returned if the @code{GetAccess}
-attribute is public and if the @code{Hidden} attribute is false.
+Programming Note: Property names are returned if the @code{GetAccess} attribute
+is public and if the @code{Hidden} attribute is false.
 @seealso{methods}
 @end deftypefn */)
 {
@@ -721,10 +722,8 @@
 
 DEFMETHOD (__methods__, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn  {} {} __methods__ (@var{x})
-@deftypefnx {} {} __methods__ ("classname")
-Internal function.
-
+@deftypefn  {} {@var{mtds} =} __methods__ (@var{obj})
+@deftypefnx {} {@var{mtds} =} __methods__ ("classname")
 Implements @code{methods} for Octave class objects and classnames.
 @seealso{methods}
 @end deftypefn */)
@@ -775,8 +774,3 @@
 
 OCTAVE_NAMESPACE_END
 
-/*
-;;; Local Variables: ***
-;;; mode: C++ ***
-;;; End: ***
-*/
--- a/libinterp/octave-value/ov-classdef.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-classdef.h	Mon Aug 29 13:58:00 2022 +0200
@@ -166,7 +166,7 @@
   static const std::string t_name;
 };
 
-OCTINTERP_API void install_classdef (octave::interpreter& interp);
+void install_classdef (octave::interpreter& interp);
 
 class octave_classdef_meta : public octave_function
 {
@@ -284,8 +284,3 @@
 
 #endif
 
-/*
-;;; Local Variables: ***
-;;; mode: C++ ***
-;;; End: ***
-*/
--- a/libinterp/octave-value/ov-colon.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-colon.h	Mon Aug 29 13:58:00 2022 +0200
@@ -73,7 +73,8 @@
 
   OCTINTERP_API void print (std::ostream& os, bool pr_as_read_syntax = false);
 
-  OCTINTERP_API void print_raw (std::ostream& os, bool pr_as_read_syntax = false) const;
+  OCTINTERP_API void print_raw (std::ostream& os,
+                                bool pr_as_read_syntax = false) const;
 
 private:
 
--- a/libinterp/octave-value/ov-complex.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-complex.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -385,7 +385,8 @@
     }
 #if defined (HAVE_HDF5_18)
   data_hid = H5Dcreate (loc_id, name, type_hid, space_hid,
-                        octave_H5P_DEFAULT, octave_H5P_DEFAULT, octave_H5P_DEFAULT);
+                        octave_H5P_DEFAULT, octave_H5P_DEFAULT,
+                        octave_H5P_DEFAULT);
 #else
   data_hid = H5Dcreate (loc_id, name, type_hid, space_hid, octave_H5P_DEFAULT);
 #endif
--- a/libinterp/octave-value/ov-cx-mat.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-cx-mat.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -91,17 +91,17 @@
 {
   octave_base_value *retval = nullptr;
 
-  if (matrix.numel () == 1)
+  if (m_matrix.numel () == 1)
     {
-      Complex c = matrix (0);
+      Complex c = m_matrix (0);
 
       if (c.imag () == 0.0)
         retval = new octave_scalar (c.real ());
       else
         retval = new octave_complex (c);
     }
-  else if (matrix.all_elements_are_real ())
-    retval = new octave_matrix (::real (matrix));
+  else if (m_matrix.all_elements_are_real ())
+    retval = new octave_matrix (::real (m_matrix));
 
   return retval;
 }
@@ -119,7 +119,7 @@
   warn_implicit_conversion ("Octave:array-to-scalar",
                             "complex matrix", "real scalar");
 
-  return std::real (matrix(0, 0));
+  return std::real (m_matrix(0, 0));
 }
 
 float
@@ -135,7 +135,7 @@
   warn_implicit_conversion ("Octave:array-to-scalar",
                             "complex matrix", "real scalar");
 
-  return std::real (matrix(0, 0));
+  return std::real (m_matrix(0, 0));
 }
 
 NDArray
@@ -147,7 +147,7 @@
     warn_implicit_conversion ("Octave:imag-to-real",
                               "complex matrix", "real matrix");
 
-  retval = ::real (matrix);
+  retval = ::real (m_matrix);
 
   return retval;
 }
@@ -161,7 +161,7 @@
     warn_implicit_conversion ("Octave:imag-to-real",
                               "complex matrix", "real matrix");
 
-  retval = ::real (ComplexMatrix (matrix));
+  retval = ::real (ComplexMatrix (m_matrix));
 
   return retval;
 }
@@ -175,7 +175,7 @@
     warn_implicit_conversion ("Octave:imag-to-real",
                               "complex matrix", "real matrix");
 
-  retval = ::real (ComplexMatrix (matrix));
+  retval = ::real (ComplexMatrix (m_matrix));
 
   return retval;
 }
@@ -189,7 +189,7 @@
   warn_implicit_conversion ("Octave:array-to-scalar",
                             "complex matrix", "complex scalar");
 
-  return matrix(0, 0);
+  return m_matrix(0, 0);
 }
 
 FloatComplex
@@ -205,7 +205,7 @@
   warn_implicit_conversion ("Octave:array-to-scalar",
                             "complex matrix", "complex scalar");
 
-  retval = matrix(0, 0);
+  retval = m_matrix(0, 0);
 
   return retval;
 }
@@ -213,25 +213,25 @@
 ComplexMatrix
 octave_complex_matrix::complex_matrix_value (bool) const
 {
-  return ComplexMatrix (matrix);
+  return ComplexMatrix (m_matrix);
 }
 
 FloatComplexMatrix
 octave_complex_matrix::float_complex_matrix_value (bool) const
 {
-  return FloatComplexMatrix (ComplexMatrix (matrix));
+  return FloatComplexMatrix (ComplexMatrix (m_matrix));
 }
 
 boolNDArray
 octave_complex_matrix::bool_array_value (bool warn) const
 {
-  if (matrix.any_element_is_nan ())
+  if (m_matrix.any_element_is_nan ())
     octave::err_nan_to_logical_conversion ();
-  if (warn && (! matrix.all_elements_are_real ()
-               || real (matrix).any_element_not_one_or_zero ()))
+  if (warn && (! m_matrix.all_elements_are_real ()
+               || real (m_matrix).any_element_not_one_or_zero ()))
     warn_logical_conversion ();
 
-  return mx_el_ne (matrix, Complex (0.0));
+  return mx_el_ne (m_matrix, Complex (0.0));
 }
 
 charNDArray
@@ -248,7 +248,7 @@
       octave_idx_type nel = numel ();
 
       for (octave_idx_type i = 0; i < nel; i++)
-        retval.elem (i) = static_cast<char> (std::real (matrix.elem (i)));
+        retval.elem (i) = static_cast<char> (std::real (m_matrix.elem (i)));
     }
 
   return retval;
@@ -257,7 +257,7 @@
 FloatComplexNDArray
 octave_complex_matrix::float_complex_array_value (bool) const
 {
-  return FloatComplexNDArray (matrix);
+  return FloatComplexNDArray (m_matrix);
 }
 
 SparseMatrix
@@ -269,7 +269,7 @@
     warn_implicit_conversion ("Octave:imag-to-real",
                               "complex matrix", "real matrix");
 
-  retval = SparseMatrix (::real (ComplexMatrix (matrix)));
+  retval = SparseMatrix (::real (ComplexMatrix (m_matrix)));
 
   return retval;
 }
@@ -277,28 +277,28 @@
 SparseComplexMatrix
 octave_complex_matrix::sparse_complex_matrix_value (bool) const
 {
-  return SparseComplexMatrix (ComplexMatrix (matrix));
+  return SparseComplexMatrix (ComplexMatrix (m_matrix));
 }
 
 octave_value
 octave_complex_matrix::as_double (void) const
 {
-  return matrix;
+  return m_matrix;
 }
 
 octave_value
 octave_complex_matrix::as_single (void) const
 {
-  return FloatComplexNDArray (matrix);
+  return FloatComplexNDArray (m_matrix);
 }
 
 octave_value
 octave_complex_matrix::diag (octave_idx_type k) const
 {
   octave_value retval;
-  if (k == 0 && matrix.ndims () == 2
-      && (matrix.rows () == 1 || matrix.columns () == 1))
-    retval = ComplexDiagMatrix (DiagArray2<Complex> (matrix));
+  if (k == 0 && m_matrix.ndims () == 2
+      && (m_matrix.rows () == 1 || m_matrix.columns () == 1))
+    retval = ComplexDiagMatrix (DiagArray2<Complex> (m_matrix));
   else
     retval = octave_base_matrix<ComplexNDArray>::diag (k);
 
@@ -308,11 +308,11 @@
 octave_value
 octave_complex_matrix::diag (octave_idx_type m, octave_idx_type n) const
 {
-  if (matrix.ndims () != 2
-      || (matrix.rows () != 1 && matrix.columns () != 1))
+  if (m_matrix.ndims () != 2
+      || (m_matrix.rows () != 1 && m_matrix.columns () != 1))
     error ("diag: expecting vector argument");
 
-  ComplexMatrix mat (matrix);
+  ComplexMatrix mat (m_matrix);
 
   return mat.diag (m, n);
 }
@@ -391,7 +391,7 @@
       if (! is)
         error ("load: failed to load matrix constant");
 
-      matrix = tmp;
+      m_matrix = tmp;
     }
   else if (kw == "rows")
     {
@@ -408,10 +408,10 @@
           if (! is)
             error ("load: failed to load matrix constant");
 
-          matrix = tmp;
+          m_matrix = tmp;
         }
       else if (nr == 0 || nc == 0)
-        matrix = ComplexMatrix (nr, nc);
+        m_matrix = ComplexMatrix (nr, nc);
       else
         panic_impossible ();
     }
@@ -512,7 +512,7 @@
       if (! is)
         return false;
 
-      matrix = m;
+      m_matrix = m;
     }
   else
     {
@@ -533,7 +533,7 @@
       if (! is)
         return false;
 
-      matrix = m;
+      m_matrix = m;
     }
   return true;
 }
@@ -596,7 +596,8 @@
     }
 #if defined (HAVE_HDF5_18)
   data_hid = H5Dcreate (loc_id, name, type_hid, space_hid,
-                        octave_H5P_DEFAULT, octave_H5P_DEFAULT, octave_H5P_DEFAULT);
+                        octave_H5P_DEFAULT, octave_H5P_DEFAULT,
+                        octave_H5P_DEFAULT);
 #else
   data_hid = H5Dcreate (loc_id, name, type_hid, space_hid, octave_H5P_DEFAULT);
 #endif
@@ -650,7 +651,7 @@
   dim_vector dv;
   int empty = load_hdf5_empty (loc_id, name, dv);
   if (empty > 0)
-    matrix.resize (dv);
+    m_matrix.resize (dv);
   if (empty)
     return (empty > 0);
 
@@ -708,7 +709,7 @@
       >= 0)
     {
       retval = true;
-      matrix = m;
+      m_matrix = m;
     }
 
   H5Tclose (complex_type);
@@ -729,7 +730,7 @@
 octave_complex_matrix::print_raw (std::ostream& os,
                                   bool pr_as_read_syntax) const
 {
-  octave_print_internal (os, matrix, pr_as_read_syntax,
+  octave_print_internal (os, m_matrix, pr_as_read_syntax,
                          current_print_indent_level ());
 }
 
@@ -741,7 +742,7 @@
 
   mwSize nel = numel ();
 
-  const Complex *pdata = matrix.data ();
+  const Complex *pdata = m_matrix.data ();
 
   if (interleaved)
     {
@@ -776,20 +777,20 @@
     {
     // Mappers handled specially.
     case umap_real:
-      return ::real (matrix);
+      return ::real (m_matrix);
     case umap_imag:
-      return ::imag (matrix);
+      return ::imag (m_matrix);
     case umap_conj:
-      return ::conj (matrix);
+      return ::conj (m_matrix);
 
     // Special cases for Matlab compatibility.
     case umap_xtolower:
     case umap_xtoupper:
-      return matrix;
+      return m_matrix;
 
 #define ARRAY_METHOD_MAPPER(UMAP, FCN)        \
     case umap_ ## UMAP:                       \
-      return octave_value (matrix.FCN ())
+      return octave_value (m_matrix.FCN ())
 
     ARRAY_METHOD_MAPPER (abs, abs);
     ARRAY_METHOD_MAPPER (isnan, isnan);
@@ -798,7 +799,7 @@
 
 #define ARRAY_MAPPER(UMAP, TYPE, FCN)                 \
     case umap_ ## UMAP:                               \
-      return octave_value (matrix.map<TYPE> (FCN))
+      return octave_value (m_matrix.map<TYPE> (FCN))
 
     ARRAY_MAPPER (acos, Complex, octave::math::acos);
     ARRAY_MAPPER (acosh, Complex, octave::math::acosh);
--- a/libinterp/octave-value/ov-cx-mat.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-cx-mat.h	Mon Aug 29 13:58:00 2022 +0200
@@ -126,7 +126,7 @@
 
   FloatComplexMatrix float_complex_matrix_value (bool = false) const;
 
-  ComplexNDArray complex_array_value (bool = false) const { return matrix; }
+  ComplexNDArray complex_array_value (bool = false) const { return m_matrix; }
 
   FloatComplexNDArray float_complex_array_value (bool = false) const;
 
@@ -145,11 +145,11 @@
 
   octave_value diag (octave_idx_type m, octave_idx_type n) const;
 
-  void increment (void) { matrix += Complex (1.0); }
+  void increment (void) { m_matrix += Complex (1.0); }
 
-  void decrement (void) { matrix -= Complex (1.0); }
+  void decrement (void) { m_matrix -= Complex (1.0); }
 
-  void changesign (void) { matrix.changesign (); }
+  void changesign (void) { m_matrix.changesign (); }
 
   bool save_ascii (std::ostream& os);
 
--- a/libinterp/octave-value/ov-cx-sparse.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-cx-sparse.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -60,49 +60,8 @@
 octave_base_value *
 octave_sparse_complex_matrix::try_narrowing_conversion (void)
 {
-  octave_base_value *retval = nullptr;
-
-  if (Vsparse_auto_mutate)
-    {
-      int nr = matrix.rows ();
-      int nc = matrix.cols ();
-
-      // Don't use numel, since it can overflow for very large matrices
-      // Note that for the tests on matrix size, they become approximative
-      // since they involves a cast to double to avoid issues of overflow
-      if (matrix.rows () == 1 && matrix.cols () == 1)
-        {
-          // Const copy of the matrix, so the right version of () operator used
-          const SparseComplexMatrix tmp (matrix);
-
-          Complex c = tmp (0, 0);
-
-          if (c.imag () == 0.0)
-            retval = new octave_scalar (c.real ());
-          else
-            retval = new octave_complex (c);
-        }
-      else if (nr == 0 || nc == 0)
-        retval = new octave_matrix (Matrix (nr, nc));
-      else if (matrix.all_elements_are_real ())
-        if (matrix.cols () > 0 && matrix.rows () > 0
-            && (double (matrix.byte_size ()) > double (matrix.rows ())
-                * double (matrix.cols ()) * sizeof (double)))
-          retval = new octave_matrix (::real (matrix.matrix_value ()));
-        else
-          retval = new octave_sparse_matrix (::real (matrix));
-      else if (matrix.cols () > 0 && matrix.rows () > 0
-               && (double (matrix.byte_size ()) > double (matrix.rows ())
-                   * double (matrix.cols ()) * sizeof (Complex)))
-        retval = new octave_complex_matrix (matrix.matrix_value ());
-    }
-  else
-    {
-      if (matrix.all_elements_are_real ())
-        retval = new octave_sparse_matrix (::real (matrix));
-    }
-
-  return retval;
+  return (matrix.all_elements_are_real ()
+          ? new octave_sparse_matrix (::real (matrix)) : nullptr);
 }
 
 double
@@ -400,7 +359,8 @@
 
 #if defined (HAVE_HDF5_18)
   data_hid = H5Dcreate (group_hid, "nr", H5T_NATIVE_IDX, space_hid,
-                        octave_H5P_DEFAULT, octave_H5P_DEFAULT, octave_H5P_DEFAULT);
+                        octave_H5P_DEFAULT, octave_H5P_DEFAULT,
+                        octave_H5P_DEFAULT);
 #else
   data_hid = H5Dcreate (group_hid, "nr", H5T_NATIVE_IDX, space_hid,
                         octave_H5P_DEFAULT);
@@ -425,7 +385,8 @@
 
 #if defined (HAVE_HDF5_18)
   data_hid = H5Dcreate (group_hid, "nc", H5T_NATIVE_IDX, space_hid,
-                        octave_H5P_DEFAULT, octave_H5P_DEFAULT, octave_H5P_DEFAULT);
+                        octave_H5P_DEFAULT, octave_H5P_DEFAULT,
+                        octave_H5P_DEFAULT);
 #else
   data_hid = H5Dcreate (group_hid, "nc", H5T_NATIVE_IDX, space_hid,
                         octave_H5P_DEFAULT);
@@ -450,7 +411,8 @@
 
 #if defined (HAVE_HDF5_18)
   data_hid = H5Dcreate (group_hid, "nz", H5T_NATIVE_IDX, space_hid,
-                        octave_H5P_DEFAULT, octave_H5P_DEFAULT, octave_H5P_DEFAULT);
+                        octave_H5P_DEFAULT, octave_H5P_DEFAULT,
+                        octave_H5P_DEFAULT);
 #else
   data_hid = H5Dcreate (group_hid, "nz", H5T_NATIVE_IDX, space_hid,
                         octave_H5P_DEFAULT);
@@ -488,7 +450,8 @@
 
 #if defined (HAVE_HDF5_18)
   data_hid = H5Dcreate (group_hid, "cidx", H5T_NATIVE_IDX, space_hid,
-                        octave_H5P_DEFAULT, octave_H5P_DEFAULT, octave_H5P_DEFAULT);
+                        octave_H5P_DEFAULT, octave_H5P_DEFAULT,
+                        octave_H5P_DEFAULT);
 #else
   data_hid = H5Dcreate (group_hid, "cidx", H5T_NATIVE_IDX, space_hid,
                         octave_H5P_DEFAULT);
@@ -526,7 +489,8 @@
 
 #if defined (HAVE_HDF5_18)
   data_hid = H5Dcreate (group_hid, "ridx", H5T_NATIVE_IDX, space_hid,
-                        octave_H5P_DEFAULT, octave_H5P_DEFAULT, octave_H5P_DEFAULT);
+                        octave_H5P_DEFAULT, octave_H5P_DEFAULT,
+                        octave_H5P_DEFAULT);
 #else
   data_hid = H5Dcreate (group_hid, "ridx", H5T_NATIVE_IDX, space_hid,
                         octave_H5P_DEFAULT);
@@ -582,7 +546,8 @@
     }
 #if defined (HAVE_HDF5_18)
   data_hid = H5Dcreate (group_hid, "data", type_hid, space_hid,
-                        octave_H5P_DEFAULT, octave_H5P_DEFAULT, octave_H5P_DEFAULT);
+                        octave_H5P_DEFAULT, octave_H5P_DEFAULT,
+                        octave_H5P_DEFAULT);
 #else
   data_hid = H5Dcreate (group_hid, "data", type_hid, space_hid,
                         octave_H5P_DEFAULT);
@@ -601,8 +566,8 @@
     {
       Complex *ctmp = m.xdata ();
 
-      retval = H5Dwrite (data_hid, complex_type_hid, octave_H5S_ALL, octave_H5S_ALL,
-                         octave_H5P_DEFAULT, ctmp) >= 0;
+      retval = H5Dwrite (data_hid, complex_type_hid, octave_H5S_ALL,
+                         octave_H5S_ALL, octave_H5P_DEFAULT, ctmp) >= 0;
     }
 
   H5Dclose (data_hid);
--- a/libinterp/octave-value/ov-dld-fcn.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-dld-fcn.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -85,8 +85,7 @@
 
 octave_dld_function::~octave_dld_function (void)
 {
-  octave::dynamic_loader& dyn_loader
-    = octave::__get_dynamic_loader__ ("~octave_dld_function");
+  octave::dynamic_loader& dyn_loader = octave::__get_dynamic_loader__ ();
 
   dyn_loader.remove_oct (m_name, m_sh_lib);
 }
--- a/libinterp/octave-value/ov-dld-fcn.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-dld-fcn.h	Mon Aug 29 13:58:00 2022 +0200
@@ -63,13 +63,14 @@
 
   // No copying!
 
-  octave_dld_function (const octave_dld_function& fn) = delete;
+  octave_dld_function (const octave_dld_function& fcn) = delete;
 
-  octave_dld_function& operator = (const octave_dld_function& fn) = delete;
+  octave_dld_function& operator = (const octave_dld_function& fcn) = delete;
 
   ~octave_dld_function (void);
 
-  void mark_fcn_file_up_to_date (const octave::sys::time& t) { m_time_checked = t; }
+  void mark_fcn_file_up_to_date (const octave::sys::time& t)
+  { m_time_checked = t; }
 
   std::string fcn_file_name (void) const;
 
--- a/libinterp/octave-value/ov-fcn-handle.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-fcn-handle.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -217,7 +217,8 @@
 
     bool load_binary (std::istream& is, bool swap, mach_info::float_format fmt);
 
-    bool save_hdf5 (octave_hdf5_id loc_hid, const char *name, bool save_as_floats);
+    bool save_hdf5 (octave_hdf5_id loc_hid, const char *name,
+                    bool save_as_floats);
 
     bool load_hdf5 (octave_hdf5_id& group_hid, octave_hdf5_id& space_hid,
                     octave_hdf5_id& type_hid);
@@ -289,7 +290,8 @@
 
     bool load_binary (std::istream& is, bool swap, mach_info::float_format fmt);
 
-    bool save_hdf5 (octave_hdf5_id loc_id, const char *name, bool save_as_floats);
+    bool save_hdf5 (octave_hdf5_id loc_id, const char *name,
+                    bool save_as_floats);
 
     bool load_hdf5 (octave_hdf5_id& group_hid, octave_hdf5_id& space_hid,
                     octave_hdf5_id& type_hid);
@@ -362,7 +364,8 @@
 
     bool load_binary (std::istream& is, bool swap, mach_info::float_format fmt);
 
-    bool save_hdf5 (octave_hdf5_id loc_id, const char *name, bool save_as_floats);
+    bool save_hdf5 (octave_hdf5_id loc_id, const char *name,
+                    bool save_as_floats);
 
     bool load_hdf5 (octave_hdf5_id& group_hid, octave_hdf5_id& space_hid,
                     octave_hdf5_id& type_hid);
@@ -517,8 +520,7 @@
       if (m_fcn.is_defined ())
         return m_fcn.function_value ();
 
-      symbol_table& symtab
-        = __get_symbol_table__ ("class_simple_fcn_handle::function_value");
+      symbol_table& symtab = __get_symbol_table__ ();
 
       // FIXME: is caching the correct thing to do?
       // Cache this value so that the pointer will be valid as long as the
@@ -553,7 +555,8 @@
 
     bool load_binary (std::istream& is, bool swap, mach_info::float_format fmt);
 
-    bool save_hdf5 (octave_hdf5_id loc_id, const char *name, bool save_as_floats);
+    bool save_hdf5 (octave_hdf5_id loc_id, const char *name,
+                    bool save_as_floats);
 
     bool load_hdf5 (octave_hdf5_id& group_hid, octave_hdf5_id& space_hid,
                     octave_hdf5_id& type_hid);
@@ -657,7 +660,8 @@
 
     bool load_binary (std::istream& is, bool swap, mach_info::float_format fmt);
 
-    bool save_hdf5 (octave_hdf5_id loc_id, const char *name, bool save_as_floats);
+    bool save_hdf5 (octave_hdf5_id loc_id, const char *name,
+                    bool save_as_floats);
 
     bool load_hdf5 (octave_hdf5_id& group_hid, octave_hdf5_id& space_hid,
                     octave_hdf5_id& type_hid);
@@ -912,7 +916,7 @@
   octave_value_list
   internal_fcn_handle::call (int nargout, const octave_value_list& args)
   {
-    interpreter& interp = __get_interpreter__ ("internal_fcn_handle::call");
+    interpreter& interp = __get_interpreter__ ();
 
     return interp.feval (m_fcn, args, nargout);
   }
@@ -945,7 +949,7 @@
     // it is a classdef meta object, then build TYPE and IDX arguments and
     // make a subsref call using them.
 
-    interpreter& interp = __get_interpreter__ ("simple_fcn_handle::call");
+    interpreter& interp = __get_interpreter__ ();
 
     octave_value fcn_to_call;
 
@@ -1132,8 +1136,7 @@
     if (m_fcn.is_defined ())
       return m_fcn.function_value ();
 
-    symbol_table& symtab
-      = __get_symbol_table__ ("simple_fcn_handle::function_value");
+    symbol_table& symtab = __get_symbol_table__ ();
 
     // FIXME: is caching the correct thing to do?
     // Cache this value so that the pointer will be valid as long as the
@@ -1152,8 +1155,7 @@
     if (m_fcn.is_defined ())
       return m_fcn.user_function_value ();
 
-    symbol_table& symtab
-      = __get_symbol_table__ ("simple_fcn_handle::user_function_value");
+    symbol_table& symtab = __get_symbol_table__ ();
 
     // FIXME: is caching the correct thing to do?
     // Cache this value so that the pointer will be valid as long as the
@@ -1169,8 +1171,7 @@
     if (m_fcn.is_defined ())
       return m_fcn;
 
-    symbol_table& symtab
-      = __get_symbol_table__ ("simple_fcn_handle::user_function_value");
+    symbol_table& symtab = __get_symbol_table__ ();
 
     // FIXME: is caching the correct thing to do?
     // Cache this value so that the pointer will be valid as long as the
@@ -1360,7 +1361,8 @@
     a_id = H5Acreate (group_hid, "FILE", type_hid, space_hid,
                       octave_H5P_DEFAULT, octave_H5P_DEFAULT);
 #else
-    a_id = H5Acreate (group_hid, "FILE", type_hid, space_hid, octave_H5P_DEFAULT);
+    a_id = H5Acreate (group_hid, "FILE", type_hid, space_hid,
+                      octave_H5P_DEFAULT);
 #endif
 
     if (a_id >= 0)
@@ -1459,7 +1461,7 @@
   {
     // FIXME: we aren't really using the scope yet.  Hmm.
 
-    interpreter& interp = __get_interpreter__ ("simple_fcn_handle::call");
+    interpreter& interp = __get_interpreter__ ();
 
     if (! m_fcn.is_defined ())
       {
@@ -1636,8 +1638,7 @@
     // It is not an error if this fails.  We can report later that the
     // handle is invalid.
 
-    symbol_table& symtab
-      = __get_symbol_table__ ("scoped_fcn_handle::find_function");
+    symbol_table& symtab = __get_symbol_table__ ();
 
     if (m_parentage.size () == 1)
       {
@@ -1678,10 +1679,10 @@
                 if (file_name.substr (0, oct_home.size ()) == oct_home)
                   file_name = file_name.substr (oct_home.size ());
 
-                octave_value subfun = fcn->find_subfunction (m_name);
-
-                if (subfun.is_defined ())
-                  m_fcn = subfun;
+                octave_value subfcn = fcn->find_subfunction (m_name);
+
+                if (subfcn.is_defined ())
+                  m_fcn = subfcn;
               }
           }
       }
@@ -1815,7 +1816,7 @@
   octave_value_list
   nested_fcn_handle::call (int nargout, const octave_value_list& args)
   {
-    tree_evaluator& tw = __get_evaluator__ ("nested_fcn_handle::call");
+    tree_evaluator& tw = __get_evaluator__ ();
 
     octave_user_function *oct_usr_fcn = m_fcn.user_function_value ();
 
@@ -1843,7 +1844,7 @@
   octave_value_list
   weak_nested_fcn_handle::call (int nargout, const octave_value_list& args)
   {
-    tree_evaluator& tw = __get_evaluator__ ("weak_nested_fcn_handle::call");
+    tree_evaluator& tw = __get_evaluator__ ();
 
     octave_user_function *oct_usr_fcn = m_fcn.user_function_value ();
 
@@ -1897,7 +1898,7 @@
   octave_value_list
   class_simple_fcn_handle::call (int nargout, const octave_value_list& args)
   {
-    interpreter& interp = __get_interpreter__ ("class_simple_fcn_handle::call");
+    interpreter& interp = __get_interpreter__ ();
 
     if (m_obj.is_defined ())
       {
@@ -2116,8 +2117,7 @@
     // Set up temporary scope to use for evaluating the text that
     // defines the anonymous function.
 
-    interpreter& interp
-      = __get_interpreter__ ("base_anonymous_fcn_handle::load_ascii");
+    interpreter& interp = __get_interpreter__ ();
 
     tree_evaluator& tw = interp.get_evaluator ();
 
@@ -2210,7 +2210,7 @@
         std::istringstream nm_is (m_name.substr (anl));
         nm_is >> len;
 
-        // Anonymous functons don't have names.  We just used this
+        // Anonymous functions don't have names.  We just used this
         // string as temporary storage to pass the number of local
         // variable values.
 
@@ -2233,8 +2233,7 @@
     // Set up temporary scope to use for evaluating the text that
     // defines the anonymous function.
 
-    interpreter& interp
-      = __get_interpreter__ ("base_anonymous_fcn_handle::load_binary");
+    interpreter& interp = __get_interpreter__ ();
 
     tree_evaluator& tw = interp.get_evaluator ();
 
@@ -2390,7 +2389,8 @@
           retval = false;
 #if defined (HAVE_HDF5_18)
         data_hid = H5Gcreate (group_hid, "symbol table",
-                              octave_H5P_DEFAULT, octave_H5P_DEFAULT, octave_H5P_DEFAULT);
+                              octave_H5P_DEFAULT, octave_H5P_DEFAULT,
+                              octave_H5P_DEFAULT);
 #else
         data_hid = H5Gcreate (group_hid, "symbol table", 0);
 #endif
@@ -2515,16 +2515,16 @@
     // HDF5 doesn't print out all sorts of error messages if we
     // call H5Aopen for a non-existing attribute
 
-    H5E_auto_t err_func;
-    void *err_func_data;
+    H5E_auto_t err_fcn;
+    void *err_fcn_data;
 
     // turn off error reporting temporarily, but save the error
     // reporting function:
 #if defined (HAVE_HDF5_18)
-    H5Eget_auto (octave_H5E_DEFAULT, &err_func, &err_func_data);
+    H5Eget_auto (octave_H5E_DEFAULT, &err_fcn, &err_fcn_data);
     H5Eset_auto (octave_H5E_DEFAULT, nullptr, nullptr);
 #else
-    H5Eget_auto (&err_func, &err_func_data);
+    H5Eget_auto (&err_fcn, &err_fcn_data);
     H5Eset_auto (nullptr, nullptr);
 #endif
 
@@ -2540,16 +2540,15 @@
 
     // restore error reporting:
 #if defined (HAVE_HDF5_18)
-    H5Eset_auto (octave_H5E_DEFAULT, err_func, err_func_data);
+    H5Eset_auto (octave_H5E_DEFAULT, err_fcn, err_fcn_data);
 #else
-    H5Eset_auto (err_func, err_func_data);
+    H5Eset_auto (err_fcn, err_fcn_data);
 #endif
 
     // Set up temporary scope to use for evaluating the text that
     // defines the anonymous function.
 
-    interpreter& interp
-      = __get_interpreter__ ("base_anonymous_fcn_handle::load_hdf5");
+    interpreter& interp = __get_interpreter__ ();
 
     tree_evaluator& tw = interp.get_evaluator ();
 
@@ -2622,14 +2621,14 @@
 
     tree_statement_list *b = f->body ();
 
-    assert (b->length () == 1);
+    panic_if (b->length () != 1);
 
     tree_statement *s = b->front ();
 
     if (! s)
       error ("invalid anonymous function handle");
 
-    assert (s->is_expression ());
+    panic_unless (s->is_expression ());
 
     tree_expression *e = s->expression ();
 
@@ -2647,8 +2646,7 @@
     // values to the object returned by eval_string?  This code is also is
     // duplicated in read_mat5_binary_element in ls-mat5.cc.
 
-    interpreter& interp
-      = __get_interpreter__ ("base_anonymous_fcn_handle::parse");
+    interpreter& interp = __get_interpreter__ ();
 
     // Set up temporary scope to use for evaluating the text that defines
     // the anonymous function so that we don't pick up values of random
@@ -2705,7 +2703,7 @@
   octave_value_list
   anonymous_fcn_handle::call (int nargout, const octave_value_list& args)
   {
-    tree_evaluator& tw = __get_evaluator__ ("anonymous_fcn_handle::call");
+    tree_evaluator& tw = __get_evaluator__ ();
 
     octave_user_function *oct_usr_fcn = m_fcn.user_function_value ();
 
@@ -2757,7 +2755,7 @@
   octave_value_list
   weak_anonymous_fcn_handle::call (int nargout, const octave_value_list& args)
   {
-    tree_evaluator& tw = __get_evaluator__ ("anonymous_fcn_handle::call");
+    tree_evaluator& tw = __get_evaluator__ ();
 
     octave_user_function *oct_usr_fcn = m_fcn.user_function_value ();
 
@@ -2958,14 +2956,16 @@
           std::string name;
           is >> name;
 
-          new_rep.reset (new octave::simple_fcn_handle (name, fpath, octaveroot));
+          new_rep.reset (new octave::simple_fcn_handle (name, fpath,
+                                                        octaveroot));
         }
       else if (subtype == "scopedfunction")
         {
           std::string name;
           is >> name;
 
-          new_rep.reset (new octave::scoped_fcn_handle (name, fpath, octaveroot));
+          new_rep.reset (new octave::scoped_fcn_handle (name, fpath,
+                                                        octaveroot));
         }
       else if (subtype == "anonymous")
         new_rep.reset (new octave::anonymous_fcn_handle ());
@@ -2974,14 +2974,16 @@
           std::string name;
           is >> name;
 
-          new_rep.reset (new octave::nested_fcn_handle (name, fpath, octaveroot));
+          new_rep.reset (new octave::nested_fcn_handle (name, fpath,
+                                                        octaveroot));
         }
       else if (subtype == "classsimple")
         {
           std::string name;
           is >> name;
 
-          new_rep.reset (new octave::class_simple_fcn_handle (name, fpath, octaveroot));
+          new_rep.reset (new octave::class_simple_fcn_handle (name, fpath,
+                                                              octaveroot));
         }
     }
 
@@ -3081,7 +3083,8 @@
       else if (subtype == "nested")
         new_rep.reset (new octave::nested_fcn_handle (name, fpath, octaveroot));
       else if (subtype == "classsimple")
-        new_rep.reset (new octave::class_simple_fcn_handle (name, fpath, octaveroot));
+        new_rep.reset (new octave::class_simple_fcn_handle (name, fpath,
+                                                            octaveroot));
     }
 
   if (! new_rep)
@@ -3234,7 +3237,8 @@
       else if (subtype == "nested")
         new_rep.reset (new octave::nested_fcn_handle (name, fpath, octaveroot));
       else if (subtype == "classsimple")
-        new_rep.reset (new octave::class_simple_fcn_handle (name, fpath, octaveroot));
+        new_rep.reset (new octave::class_simple_fcn_handle (name, fpath,
+                                                            octaveroot));
     }
 
   bool status = false;
@@ -3401,16 +3405,6 @@
 
 OCTAVE_NAMESPACE_BEGIN
 
-  // DEPRECATED in Octave 6.
-
-  octave_value
-  make_fcn_handle (interpreter& interp, const std::string& nm)
-  {
-    tree_evaluator& tw = interp.get_evaluator ();
-
-    return tw.make_fcn_handle (nm);
-  }
-
 DEFUN (functions, args, ,
        doc: /* -*- texinfo -*-
 @deftypefn {} {@var{s} =} functions (@var{fcn_handle})
@@ -3472,9 +3466,9 @@
 
 DEFUN (func2str, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} func2str (@var{fcn_handle})
-Return a string containing the name of the function referenced by the
-function handle @var{fcn_handle}.
+@deftypefn {} {@var{str} =} func2str (@var{fcn_handle})
+Return a string containing the name of the function referenced by the function
+handle @var{fcn_handle}.
 @seealso{str2func, functions}
 @end deftypefn */)
 {
@@ -3506,12 +3500,23 @@
 
 DEFMETHOD (str2func, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} str2func (@var{fcn_name})
-Return a function handle constructed from the string @var{fcn_name}.
-
-Previous versions of Octave accepted an optional second argument,
-@qcode{"global"}, that caused str2func to ignore locally visible
-functions.  This option is no longer supported.
+@deftypefn {} {@var{hfcn} =} str2func (@var{str})
+Return a function handle constructed from the string @var{str}.
+
+The input may be the name of a function such as @qcode{"sin"} or a string
+defining a function such as @qcode{"@@(x) sin (x + pi)"}.
+
+Programming Note: In most cases it will be better to use anonymous function
+syntax and let the Octave parser create the function handle rather than use
+@code{str2func}.  For example:
+
+@example
+@group
+hfcn = @@sin ;
+hfcn = @@(x) sin (x + pi) ;
+@end group
+@end example
+
 @seealso{func2str, functions}
 @end deftypefn */)
 {
@@ -3532,7 +3537,7 @@
       // temporary scope to use for evaluating the text that defines
       // the anonymous function.  Here we want
       //
-      //   str2fun ("@(args) expr")
+      //   str2func ("@(args) expr")
       //
       // to behave the same as if
       //
@@ -3577,7 +3582,7 @@
 */
 
 /*
-%!function y = __testrecursionfunc (f, x, n)
+%!function y = __testrecursionfcn (f, x, n)
 %!  if (nargin < 3)
 %!    n = 0;
 %!  endif
@@ -3585,16 +3590,16 @@
 %!    y = f (x);
 %!  else
 %!    n++;
-%!    y = __testrecursionfunc (@(x) f (2*x), x, n);
+%!    y = __testrecursionfcn (@(x) f (2*x), x, n);
 %!  endif
 %!endfunction
 %!
-%!assert (__testrecursionfunc (@(x) x, 1), 8)
+%!assert (__testrecursionfcn (@(x) x, 1), 8)
 */
 
 DEFUN (is_function_handle, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} is_function_handle (@var{x})
+@deftypefn {} {@var{tf} =} is_function_handle (@var{x})
 Return true if @var{x} is a function handle.
 @seealso{isa, typeinfo, class, functions}
 @end deftypefn */)
--- a/libinterp/octave-value/ov-fcn-handle.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-fcn-handle.h	Mon Aug 29 13:58:00 2022 +0200
@@ -373,14 +373,4 @@
 extern bool
 is_equal_to (const octave_fcn_handle& fh1, const octave_fcn_handle& fh2);
 
-OCTAVE_NAMESPACE_BEGIN
-
-#if defined (OCTAVE_PROVIDE_DEPRECATED_SYMBOLS)
-  OCTAVE_DEPRECATED (6, "use 'tree_evaluator::make_fcn_handle' instead")
-  extern octave_value
-  make_fcn_handle (interpreter& interp, const std::string& name);
 #endif
-
-OCTAVE_NAMESPACE_END
-
-#endif
--- a/libinterp/octave-value/ov-float.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-float.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -262,7 +262,8 @@
   if (space_hid < 0) return false;
 #if defined (HAVE_HDF5_18)
   data_hid = H5Dcreate (loc_id, name, H5T_NATIVE_FLOAT, space_hid,
-                        octave_H5P_DEFAULT, octave_H5P_DEFAULT, octave_H5P_DEFAULT);
+                        octave_H5P_DEFAULT, octave_H5P_DEFAULT,
+                        octave_H5P_DEFAULT);
 #else
   data_hid = H5Dcreate (loc_id, name, H5T_NATIVE_FLOAT, space_hid,
                         octave_H5P_DEFAULT);
--- a/libinterp/octave-value/ov-flt-complex.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-flt-complex.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -326,7 +326,8 @@
     }
 #if defined (HAVE_HDF5_18)
   data_hid = H5Dcreate (loc_id, name, type_hid, space_hid,
-                        octave_H5P_DEFAULT, octave_H5P_DEFAULT, octave_H5P_DEFAULT);
+                        octave_H5P_DEFAULT, octave_H5P_DEFAULT,
+                        octave_H5P_DEFAULT);
 #else
   data_hid = H5Dcreate (loc_id, name, type_hid, space_hid, octave_H5P_DEFAULT);
 #endif
--- a/libinterp/octave-value/ov-flt-cx-diag.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-flt-cx-diag.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -148,8 +148,7 @@
       return ::imag (m_matrix);
     case umap_sqrt:
       {
-        FloatComplexColumnVector tmp = m_matrix.extract_diag ().map<FloatComplex>
-                                       (std::sqrt);
+        FloatComplexColumnVector tmp = m_matrix.extract_diag ().map<FloatComplex> (std::sqrt);
         FloatComplexDiagMatrix retval (tmp);
         retval.resize (m_matrix.rows (), m_matrix.columns ());
         return retval;
--- a/libinterp/octave-value/ov-flt-cx-mat.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-flt-cx-mat.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -79,17 +79,17 @@
 {
   octave_base_value *retval = nullptr;
 
-  if (matrix.numel () == 1)
+  if (m_matrix.numel () == 1)
     {
-      FloatComplex c = matrix (0);
+      FloatComplex c = m_matrix (0);
 
       if (c.imag () == 0.0)
         retval = new octave_float_scalar (c.real ());
       else
         retval = new octave_float_complex (c);
     }
-  else if (matrix.all_elements_are_real ())
-    retval = new octave_float_matrix (::real (matrix));
+  else if (m_matrix.all_elements_are_real ())
+    retval = new octave_float_matrix (::real (m_matrix));
 
   return retval;
 }
@@ -107,7 +107,7 @@
   warn_implicit_conversion ("Octave:array-to-scalar",
                             "complex matrix", "real scalar");
 
-  return std::real (matrix(0, 0));
+  return std::real (m_matrix(0, 0));
 }
 
 float
@@ -123,7 +123,7 @@
   warn_implicit_conversion ("Octave:array-to-scalar",
                             "complex matrix", "real scalar");
 
-  return std::real (matrix(0, 0));
+  return std::real (m_matrix(0, 0));
 }
 
 Matrix
@@ -135,7 +135,7 @@
     warn_implicit_conversion ("Octave:imag-to-real",
                               "complex matrix", "real matrix");
 
-  retval = ::real (FloatComplexMatrix (matrix));
+  retval = ::real (FloatComplexMatrix (m_matrix));
 
   return retval;
 }
@@ -149,7 +149,7 @@
     warn_implicit_conversion ("Octave:imag-to-real",
                               "complex matrix", "real matrix");
 
-  retval = ::real (FloatComplexMatrix (matrix));
+  retval = ::real (FloatComplexMatrix (m_matrix));
 
   return retval;
 }
@@ -163,7 +163,7 @@
   warn_implicit_conversion ("Octave:array-to-scalar",
                             "complex matrix", "complex scalar");
 
-  return matrix(0, 0);
+  return m_matrix(0, 0);
 }
 
 FloatComplex
@@ -179,7 +179,7 @@
   warn_implicit_conversion ("Octave:array-to-scalar",
                             "complex matrix", "complex scalar");
 
-  retval = matrix(0, 0);
+  retval = m_matrix(0, 0);
 
   return retval;
 }
@@ -187,25 +187,25 @@
 ComplexMatrix
 octave_float_complex_matrix::complex_matrix_value (bool) const
 {
-  return FloatComplexMatrix (matrix);
+  return FloatComplexMatrix (m_matrix);
 }
 
 FloatComplexMatrix
 octave_float_complex_matrix::float_complex_matrix_value (bool) const
 {
-  return FloatComplexMatrix (matrix);
+  return FloatComplexMatrix (m_matrix);
 }
 
 boolNDArray
 octave_float_complex_matrix::bool_array_value (bool warn) const
 {
-  if (matrix.any_element_is_nan ())
+  if (m_matrix.any_element_is_nan ())
     octave::err_nan_to_logical_conversion ();
-  if (warn && (! matrix.all_elements_are_real ()
-               || real (matrix).any_element_not_one_or_zero ()))
+  if (warn && (! m_matrix.all_elements_are_real ()
+               || real (m_matrix).any_element_not_one_or_zero ()))
     warn_logical_conversion ();
 
-  return mx_el_ne (matrix, FloatComplex (0.0));
+  return mx_el_ne (m_matrix, FloatComplex (0.0));
 }
 
 charNDArray
@@ -222,7 +222,7 @@
       octave_idx_type nel = numel ();
 
       for (octave_idx_type i = 0; i < nel; i++)
-        retval.elem (i) = static_cast<char> (std::real (matrix.elem (i)));
+        retval.elem (i) = static_cast<char> (std::real (m_matrix.elem (i)));
     }
 
   return retval;
@@ -231,7 +231,7 @@
 FloatComplexNDArray
 octave_float_complex_matrix::float_complex_array_value (bool) const
 {
-  return FloatComplexNDArray (matrix);
+  return FloatComplexNDArray (m_matrix);
 }
 
 SparseMatrix
@@ -257,22 +257,22 @@
 octave_value
 octave_float_complex_matrix::as_double (void) const
 {
-  return ComplexNDArray (matrix);
+  return ComplexNDArray (m_matrix);
 }
 
 octave_value
 octave_float_complex_matrix::as_single (void) const
 {
-  return matrix;
+  return m_matrix;
 }
 
 octave_value
 octave_float_complex_matrix::diag (octave_idx_type k) const
 {
   octave_value retval;
-  if (k == 0 && matrix.ndims () == 2
-      && (matrix.rows () == 1 || matrix.columns () == 1))
-    retval = FloatComplexDiagMatrix (DiagArray2<FloatComplex> (matrix));
+  if (k == 0 && m_matrix.ndims () == 2
+      && (m_matrix.rows () == 1 || m_matrix.columns () == 1))
+    retval = FloatComplexDiagMatrix (DiagArray2<FloatComplex> (m_matrix));
   else
     retval = octave_base_matrix<FloatComplexNDArray>::diag (k);
 
@@ -282,11 +282,11 @@
 octave_value
 octave_float_complex_matrix::diag (octave_idx_type m, octave_idx_type n) const
 {
-  if (matrix.ndims () != 2
-      || (matrix.rows () != 1 && matrix.columns () != 1))
+  if (m_matrix.ndims () != 2
+      || (m_matrix.rows () != 1 && m_matrix.columns () != 1))
     error ("diag: expecting vector argument");
 
-  FloatComplexMatrix mat (matrix);
+  FloatComplexMatrix mat (m_matrix);
 
   return mat.diag (m, n);
 }
@@ -366,7 +366,7 @@
       if (! is)
         error ("load: failed to load matrix constant");
 
-      matrix = tmp;
+      m_matrix = tmp;
     }
   else if (kw == "rows")
     {
@@ -383,10 +383,10 @@
           if (! is)
             error ("load: failed to load matrix constant");
 
-          matrix = tmp;
+          m_matrix = tmp;
         }
       else if (nr == 0 || nc == 0)
-        matrix = FloatComplexMatrix (nr, nc);
+        m_matrix = FloatComplexMatrix (nr, nc);
       else
         panic_impossible ();
     }
@@ -477,7 +477,7 @@
       if (! is)
         return false;
 
-      matrix = m;
+      m_matrix = m;
     }
   else
     {
@@ -498,7 +498,7 @@
       if (! is)
         return false;
 
-      matrix = m;
+      m_matrix = m;
     }
   return true;
 }
@@ -552,7 +552,8 @@
     }
 #if defined (HAVE_HDF5_18)
   data_hid = H5Dcreate (loc_id, name, type_hid, space_hid,
-                        octave_H5P_DEFAULT, octave_H5P_DEFAULT, octave_H5P_DEFAULT);
+                        octave_H5P_DEFAULT, octave_H5P_DEFAULT,
+                        octave_H5P_DEFAULT);
 #else
   data_hid = H5Dcreate (loc_id, name, type_hid, space_hid, octave_H5P_DEFAULT);
 #endif
@@ -603,7 +604,7 @@
   dim_vector dv;
   int empty = load_hdf5_empty (loc_id, name, dv);
   if (empty > 0)
-    matrix.resize (dv);
+    m_matrix.resize (dv);
   if (empty)
     return (empty > 0);
 
@@ -661,7 +662,7 @@
       >= 0)
     {
       retval = true;
-      matrix = m;
+      m_matrix = m;
     }
 
   H5Tclose (complex_type);
@@ -682,7 +683,7 @@
 octave_float_complex_matrix::print_raw (std::ostream& os,
                                         bool pr_as_read_syntax) const
 {
-  octave_print_internal (os, matrix, pr_as_read_syntax,
+  octave_print_internal (os, m_matrix, pr_as_read_syntax,
                          current_print_indent_level ());
 }
 
@@ -694,7 +695,7 @@
 
   mwSize nel = numel ();
 
-  const FloatComplex *pdata = matrix.data ();
+  const FloatComplex *pdata = m_matrix.data ();
 
   if (interleaved)
     {
@@ -729,20 +730,20 @@
     {
     // Mappers handled specially.
     case umap_real:
-      return ::real (matrix);
+      return ::real (m_matrix);
     case umap_imag:
-      return ::imag (matrix);
+      return ::imag (m_matrix);
     case umap_conj:
-      return ::conj (matrix);
+      return ::conj (m_matrix);
 
     // Special cases for Matlab compatibility.
     case umap_xtolower:
     case umap_xtoupper:
-      return matrix;
+      return m_matrix;
 
 #define ARRAY_METHOD_MAPPER(UMAP, FCN)        \
     case umap_ ## UMAP:                       \
-      return octave_value (matrix.FCN ())
+      return octave_value (m_matrix.FCN ())
 
     ARRAY_METHOD_MAPPER (abs, abs);
     ARRAY_METHOD_MAPPER (isnan, isnan);
@@ -751,7 +752,7 @@
 
 #define ARRAY_MAPPER(UMAP, TYPE, FCN)                 \
     case umap_ ## UMAP:                               \
-      return octave_value (matrix.map<TYPE> (FCN))
+      return octave_value (m_matrix.map<TYPE> (FCN))
 
     ARRAY_MAPPER (acos, FloatComplex, octave::math::acos);
     ARRAY_MAPPER (acosh, FloatComplex, octave::math::acosh);
--- a/libinterp/octave-value/ov-flt-cx-mat.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-flt-cx-mat.h	Mon Aug 29 13:58:00 2022 +0200
@@ -122,7 +122,7 @@
 
   FloatComplexMatrix float_complex_matrix_value (bool = false) const;
 
-  ComplexNDArray complex_array_value (bool = false) const { return matrix; }
+  ComplexNDArray complex_array_value (bool = false) const { return m_matrix; }
 
   FloatComplexNDArray float_complex_array_value (bool = false) const;
 
@@ -141,11 +141,11 @@
 
   octave_value diag (octave_idx_type m, octave_idx_type n) const;
 
-  void increment (void) { matrix += FloatComplex (1.0); }
+  void increment (void) { m_matrix += FloatComplex (1.0); }
 
-  void decrement (void) { matrix -= FloatComplex (1.0); }
+  void decrement (void) { m_matrix -= FloatComplex (1.0); }
 
-  void changesign (void) { matrix.changesign (); }
+  void changesign (void) { m_matrix.changesign (); }
 
   bool save_ascii (std::ostream& os);
 
--- a/libinterp/octave-value/ov-flt-re-diag.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-flt-re-diag.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -166,8 +166,7 @@
       return DiagMatrix (m_matrix.rows (), m_matrix.cols (), 0.0);
     case umap_sqrt:
       {
-        FloatComplexColumnVector tmp = m_matrix.extract_diag ().map<FloatComplex>
-                                       (octave::math::rc_sqrt);
+        FloatComplexColumnVector tmp = m_matrix.extract_diag ().map<FloatComplex> (octave::math::rc_sqrt);
         FloatComplexDiagMatrix retval (tmp);
         retval.resize (m_matrix.rows (), m_matrix.columns ());
         return retval;
--- a/libinterp/octave-value/ov-flt-re-mat.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-flt-re-mat.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -94,8 +94,8 @@
 {
   octave_base_value *retval = nullptr;
 
-  if (matrix.numel () == 1)
-    retval = new octave_float_scalar (matrix (0));
+  if (m_matrix.numel () == 1)
+    retval = new octave_float_scalar (m_matrix (0));
 
   return retval;
 }
@@ -109,7 +109,7 @@
   warn_implicit_conversion ("Octave:array-to-scalar",
                             "real matrix", "real scalar");
 
-  return matrix(0, 0);
+  return m_matrix(0, 0);
 }
 
 float
@@ -121,7 +121,7 @@
   warn_implicit_conversion ("Octave:array-to-scalar",
                             "real matrix", "real scalar");
 
-  return matrix(0, 0);
+  return m_matrix(0, 0);
 }
 
 // FIXME
@@ -129,13 +129,13 @@
 Matrix
 octave_float_matrix::matrix_value (bool) const
 {
-  return Matrix (FloatMatrix (matrix));
+  return Matrix (FloatMatrix (m_matrix));
 }
 
 FloatMatrix
 octave_float_matrix::float_matrix_value (bool) const
 {
-  return FloatMatrix (matrix);
+  return FloatMatrix (m_matrix);
 }
 
 Complex
@@ -147,7 +147,7 @@
   warn_implicit_conversion ("Octave:array-to-scalar",
                             "real matrix", "complex scalar");
 
-  return Complex (matrix(0, 0), 0);
+  return Complex (m_matrix(0, 0), 0);
 }
 
 FloatComplex
@@ -163,7 +163,7 @@
   warn_implicit_conversion ("Octave:array-to-scalar",
                             "real matrix", "complex scalar");
 
-  retval = matrix(0, 0);
+  retval = m_matrix(0, 0);
 
   return retval;
 }
@@ -173,42 +173,42 @@
 ComplexMatrix
 octave_float_matrix::complex_matrix_value (bool) const
 {
-  return ComplexMatrix (FloatMatrix (matrix));
+  return ComplexMatrix (FloatMatrix (m_matrix));
 }
 
 FloatComplexMatrix
 octave_float_matrix::float_complex_matrix_value (bool) const
 {
-  return FloatComplexMatrix (FloatMatrix (matrix));
+  return FloatComplexMatrix (FloatMatrix (m_matrix));
 }
 
 ComplexNDArray
 octave_float_matrix::complex_array_value (bool) const
 {
-  return ComplexNDArray (matrix);
+  return ComplexNDArray (m_matrix);
 }
 
 FloatComplexNDArray
 octave_float_matrix::float_complex_array_value (bool) const
 {
-  return FloatComplexNDArray (matrix);
+  return FloatComplexNDArray (m_matrix);
 }
 
 NDArray
 octave_float_matrix::array_value (bool) const
 {
-  return NDArray (matrix);
+  return NDArray (m_matrix);
 }
 
 boolNDArray
 octave_float_matrix::bool_array_value (bool warn) const
 {
-  if (matrix.any_element_is_nan ())
+  if (m_matrix.any_element_is_nan ())
     octave::err_nan_to_logical_conversion ();
-  if (warn && matrix.any_element_not_one_or_zero ())
+  if (warn && m_matrix.any_element_not_one_or_zero ())
     warn_logical_conversion ();
 
-  return boolNDArray (matrix);
+  return boolNDArray (m_matrix);
 }
 
 charNDArray
@@ -219,7 +219,7 @@
   octave_idx_type nel = numel ();
 
   for (octave_idx_type i = 0; i < nel; i++)
-    retval.elem (i) = static_cast<char> (matrix.elem (i));
+    retval.elem (i) = static_cast<char> (m_matrix.elem (i));
 
   return retval;
 }
@@ -242,70 +242,70 @@
 octave_value
 octave_float_matrix::as_double (void) const
 {
-  return NDArray (matrix);
+  return NDArray (m_matrix);
 }
 
 octave_value
 octave_float_matrix::as_single (void) const
 {
-  return FloatNDArray (matrix);
+  return FloatNDArray (m_matrix);
 }
 
 octave_value
 octave_float_matrix::as_int8 (void) const
 {
-  return int8NDArray (matrix);
+  return int8NDArray (m_matrix);
 }
 
 octave_value
 octave_float_matrix::as_int16 (void) const
 {
-  return int16NDArray (matrix);
+  return int16NDArray (m_matrix);
 }
 
 octave_value
 octave_float_matrix::as_int32 (void) const
 {
-  return int32NDArray (matrix);
+  return int32NDArray (m_matrix);
 }
 
 octave_value
 octave_float_matrix::as_int64 (void) const
 {
-  return int64NDArray (matrix);
+  return int64NDArray (m_matrix);
 }
 
 octave_value
 octave_float_matrix::as_uint8 (void) const
 {
-  return uint8NDArray (matrix);
+  return uint8NDArray (m_matrix);
 }
 
 octave_value
 octave_float_matrix::as_uint16 (void) const
 {
-  return uint16NDArray (matrix);
+  return uint16NDArray (m_matrix);
 }
 
 octave_value
 octave_float_matrix::as_uint32 (void) const
 {
-  return uint32NDArray (matrix);
+  return uint32NDArray (m_matrix);
 }
 
 octave_value
 octave_float_matrix::as_uint64 (void) const
 {
-  return uint64NDArray (matrix);
+  return uint64NDArray (m_matrix);
 }
 
 octave_value
 octave_float_matrix::diag (octave_idx_type k) const
 {
   octave_value retval;
-  if (k == 0 && matrix.ndims () == 2
-      && (matrix.rows () == 1 || matrix.columns () == 1))
-    retval = FloatDiagMatrix (DiagArray2<float> (matrix));
+  if (k == 0 && m_matrix.ndims () == 2
+      && (m_matrix.rows () == 1 || m_matrix.columns () == 1))
+    retval = FloatDiagMatrix (DiagArray2<float> (m_matrix));
   else
     retval = octave_base_matrix<FloatNDArray>::diag (k);
 
@@ -315,11 +315,11 @@
 octave_value
 octave_float_matrix::diag (octave_idx_type m, octave_idx_type n) const
 {
-  if (matrix.ndims () != 2
-      || (matrix.rows () != 1 && matrix.columns () != 1))
+  if (m_matrix.ndims () != 2
+      || (m_matrix.rows () != 1 && m_matrix.columns () != 1))
     error ("diag: expecting vector argument");
 
-  FloatMatrix mat (matrix);
+  FloatMatrix mat (m_matrix);
 
   return mat.diag (m, n);
 }
@@ -339,7 +339,7 @@
     {
       octave_quit ();
 
-      float d = matrix(i);
+      float d = m_matrix(i);
 
       if (octave::math::isnan (d))
         octave::err_nan_to_character_conversion ();
@@ -442,7 +442,7 @@
       if (! is)
         error ("load: failed to load matrix constant");
 
-      matrix = tmp;
+      m_matrix = tmp;
     }
   else if (kw == "rows")
     {
@@ -459,10 +459,10 @@
           if (! is)
             error ("load: failed to load matrix constant");
 
-          matrix = tmp;
+          m_matrix = tmp;
         }
       else if (nr == 0 || nc == 0)
-        matrix = FloatMatrix (nr, nc);
+        m_matrix = FloatMatrix (nr, nc);
       else
         panic_impossible ();
     }
@@ -552,7 +552,7 @@
       if (! is)
         return false;
 
-      matrix = m;
+      m_matrix = m;
     }
   else
     {
@@ -572,7 +572,7 @@
       if (! is)
         return false;
 
-      matrix = m;
+      m_matrix = m;
     }
   return true;
 }
@@ -619,7 +619,8 @@
 #endif
 #if defined (HAVE_HDF5_18)
   data_hid = H5Dcreate (loc_id, name, save_type_hid, space_hid,
-                        octave_H5P_DEFAULT, octave_H5P_DEFAULT, octave_H5P_DEFAULT);
+                        octave_H5P_DEFAULT, octave_H5P_DEFAULT,
+                        octave_H5P_DEFAULT);
 #else
   data_hid = H5Dcreate (loc_id, name, save_type_hid, space_hid,
                         octave_H5P_DEFAULT);
@@ -657,7 +658,7 @@
   dim_vector dv;
   int empty = load_hdf5_empty (loc_id, name, dv);
   if (empty > 0)
-    matrix.resize (dv);
+    m_matrix.resize (dv);
   if (empty)
     return (empty > 0);
 
@@ -702,7 +703,7 @@
                octave_H5P_DEFAULT, re) >= 0)
     {
       retval = true;
-      matrix = m;
+      m_matrix = m;
     }
 
   H5Sclose (space_id);
@@ -722,7 +723,7 @@
 octave_float_matrix::print_raw (std::ostream& os,
                                 bool pr_as_read_syntax) const
 {
-  octave_print_internal (os, matrix, pr_as_read_syntax,
+  octave_print_internal (os, m_matrix, pr_as_read_syntax,
                          current_print_indent_level ());
 }
 
@@ -735,7 +736,7 @@
 
   mwSize nel = numel ();
 
-  const float *pdata = matrix.data ();
+  const float *pdata = m_matrix.data ();
 
   for (mwIndex i = 0; i < nel; i++)
     pd[i] = pdata[i];
@@ -788,16 +789,16 @@
   switch (umap)
     {
     case umap_imag:
-      return FloatNDArray (matrix.dims (), 0.0);
+      return FloatNDArray (m_matrix.dims (), 0.0);
 
     case umap_real:
     case umap_conj:
-      return matrix;
+      return m_matrix;
 
     // Mappers handled specially.
 #define ARRAY_METHOD_MAPPER(UMAP, FCN)        \
     case umap_ ## UMAP:                       \
-      return octave_value (matrix.FCN ())
+      return octave_value (m_matrix.FCN ())
 
     ARRAY_METHOD_MAPPER (abs, abs);
     ARRAY_METHOD_MAPPER (isnan, isnan);
@@ -806,11 +807,11 @@
 
 #define ARRAY_MAPPER(UMAP, TYPE, FCN)                 \
     case umap_ ## UMAP:                               \
-      return octave_value (matrix.map<TYPE> (FCN))
+      return octave_value (m_matrix.map<TYPE> (FCN))
 
 #define RC_ARRAY_MAPPER(UMAP, TYPE, FCN)      \
     case umap_ ## UMAP:                       \
-      return do_rc_map (matrix, FCN)
+      return do_rc_map (m_matrix, FCN)
 
     RC_ARRAY_MAPPER (acos, FloatComplex, octave::math::rc_acos);
     RC_ARRAY_MAPPER (acosh, FloatComplex, octave::math::rc_acosh);
@@ -855,7 +856,7 @@
     // Special cases for Matlab compatibility.
     case umap_xtolower:
     case umap_xtoupper:
-      return matrix;
+      return m_matrix;
 
     case umap_xisalnum:
     case umap_xisalpha:
--- a/libinterp/octave-value/ov-flt-re-mat.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-flt-re-mat.h	Mon Aug 29 13:58:00 2022 +0200
@@ -92,7 +92,8 @@
 
   octave::idx_vector index_vector (bool /* require_integers */ = false) const
   {
-    return idx_cache ? *idx_cache : set_idx_cache (octave::idx_vector (matrix));
+    return m_idx_cache ? *m_idx_cache
+                       : set_idx_cache (octave::idx_vector (m_matrix));
   }
 
   builtin_type_t builtin_type (void) const { return btyp_float; }
@@ -106,28 +107,28 @@
   bool isfloat (void) const { return true; }
 
   int8NDArray
-  int8_array_value (void) const { return int8NDArray (matrix); }
+  int8_array_value (void) const { return int8NDArray (m_matrix); }
 
   int16NDArray
-  int16_array_value (void) const { return int16NDArray (matrix); }
+  int16_array_value (void) const { return int16NDArray (m_matrix); }
 
   int32NDArray
-  int32_array_value (void) const { return int32NDArray (matrix); }
+  int32_array_value (void) const { return int32NDArray (m_matrix); }
 
   int64NDArray
-  int64_array_value (void) const { return int64NDArray (matrix); }
+  int64_array_value (void) const { return int64NDArray (m_matrix); }
 
   uint8NDArray
-  uint8_array_value (void) const { return uint8NDArray (matrix); }
+  uint8_array_value (void) const { return uint8NDArray (m_matrix); }
 
   uint16NDArray
-  uint16_array_value (void) const { return uint16NDArray (matrix); }
+  uint16_array_value (void) const { return uint16NDArray (m_matrix); }
 
   uint32NDArray
-  uint32_array_value (void) const { return uint32NDArray (matrix); }
+  uint32_array_value (void) const { return uint32NDArray (m_matrix); }
 
   uint64NDArray
-  uint64_array_value (void) const { return uint64NDArray (matrix); }
+  uint64_array_value (void) const { return uint64NDArray (m_matrix); }
 
   double double_value (bool = false) const;
 
@@ -161,7 +162,7 @@
 
   NDArray array_value (bool = false) const;
 
-  FloatNDArray float_array_value (bool = false) const { return matrix; }
+  FloatNDArray float_array_value (bool = false) const { return m_matrix; }
 
   SparseMatrix sparse_matrix_value (bool = false) const;
 
@@ -211,7 +212,7 @@
   int write (octave::stream& os, int block_size,
              oct_data_conv::data_type output_type, int skip,
              octave::mach_info::float_format flt_fmt) const
-  { return os.write (matrix, block_size, output_type, skip, flt_fmt); }
+  { return os.write (m_matrix, block_size, output_type, skip, flt_fmt); }
 
   mxArray * as_mxArray (bool interleaved) const;
 
--- a/libinterp/octave-value/ov-int16.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-int16.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -56,8 +56,8 @@
 #include "ls-utils.h"
 #include "ls-hdf5.h"
 
-octave_hdf5_id octave_int16_matrix::hdf5_save_type = HDF5_SAVE_TYPE;
-octave_hdf5_id octave_int16_scalar::hdf5_save_type = HDF5_SAVE_TYPE;
+octave_hdf5_id octave_int16_matrix::s_hdf5_save_type = HDF5_SAVE_TYPE;
+octave_hdf5_id octave_int16_scalar::s_hdf5_save_type = HDF5_SAVE_TYPE;
 
 // Prevent implicit instantiations on some systems (Windows, others?)
 // that can lead to duplicate definitions of static data members.
--- a/libinterp/octave-value/ov-int32.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-int32.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -56,8 +56,8 @@
 #include "ls-utils.h"
 #include "ls-hdf5.h"
 
-octave_hdf5_id octave_int32_matrix::hdf5_save_type = HDF5_SAVE_TYPE;
-octave_hdf5_id octave_int32_scalar::hdf5_save_type = HDF5_SAVE_TYPE;
+octave_hdf5_id octave_int32_matrix::s_hdf5_save_type = HDF5_SAVE_TYPE;
+octave_hdf5_id octave_int32_scalar::s_hdf5_save_type = HDF5_SAVE_TYPE;
 
 // Prevent implicit instantiations on some systems (Windows, others?)
 // that can lead to duplicate definitions of static data members.
--- a/libinterp/octave-value/ov-int64.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-int64.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -56,8 +56,8 @@
 #include "ls-utils.h"
 #include "ls-hdf5.h"
 
-octave_hdf5_id octave_int64_matrix::hdf5_save_type = HDF5_SAVE_TYPE;
-octave_hdf5_id octave_int64_scalar::hdf5_save_type = HDF5_SAVE_TYPE;
+octave_hdf5_id octave_int64_matrix::s_hdf5_save_type = HDF5_SAVE_TYPE;
+octave_hdf5_id octave_int64_scalar::s_hdf5_save_type = HDF5_SAVE_TYPE;
 
 // Prevent implicit instantiations on some systems (Windows, others?)
 // that can lead to duplicate definitions of static data members.
--- a/libinterp/octave-value/ov-int8.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-int8.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -56,8 +56,8 @@
 #include "ls-utils.h"
 #include "ls-hdf5.h"
 
-octave_hdf5_id octave_int8_matrix::hdf5_save_type = HDF5_SAVE_TYPE;
-octave_hdf5_id octave_int8_scalar::hdf5_save_type = HDF5_SAVE_TYPE;
+octave_hdf5_id octave_int8_matrix::s_hdf5_save_type = HDF5_SAVE_TYPE;
+octave_hdf5_id octave_int8_scalar::s_hdf5_save_type = HDF5_SAVE_TYPE;
 
 // Prevent implicit instantiations on some systems (Windows, others?)
 // that can lead to duplicate definitions of static data members.
--- a/libinterp/octave-value/ov-intx.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-intx.h	Mon Aug 29 13:58:00 2022 +0200
@@ -83,28 +83,28 @@
 public:
 
   int8NDArray
-  int8_array_value (void) const { return int8NDArray (matrix); }
+  int8_array_value (void) const { return int8NDArray (m_matrix); }
 
   int16NDArray
-  int16_array_value (void) const { return int16NDArray (matrix); }
+  int16_array_value (void) const { return int16NDArray (m_matrix); }
 
   int32NDArray
-  int32_array_value (void) const { return int32NDArray (matrix); }
+  int32_array_value (void) const { return int32NDArray (m_matrix); }
 
   int64NDArray
-  int64_array_value (void) const { return int64NDArray (matrix); }
+  int64_array_value (void) const { return int64NDArray (m_matrix); }
 
   uint8NDArray
-  uint8_array_value (void) const { return uint8NDArray (matrix); }
+  uint8_array_value (void) const { return uint8NDArray (m_matrix); }
 
   uint16NDArray
-  uint16_array_value (void) const { return uint16NDArray (matrix); }
+  uint16_array_value (void) const { return uint16NDArray (m_matrix); }
 
   uint32NDArray
-  uint32_array_value (void) const { return uint32NDArray (matrix); }
+  uint32_array_value (void) const { return uint32NDArray (m_matrix); }
 
   uint64NDArray
-  uint64_array_value (void) const { return uint64NDArray (matrix); }
+  uint64_array_value (void) const { return uint64NDArray (m_matrix); }
 
   double
   double_value (bool = false) const
@@ -117,7 +117,7 @@
     warn_implicit_conversion ("Octave:array-to-scalar",
                               type_name (), "real scalar");
 
-    retval = matrix(0).double_value ();
+    retval = m_matrix(0).double_value ();
 
     return retval;
   }
@@ -133,7 +133,7 @@
     warn_implicit_conversion ("Octave:array-to-scalar",
                               type_name (), "real scalar");
 
-    retval = matrix(0).float_value ();
+    retval = m_matrix(0).float_value ();
 
     return retval;
   }
@@ -152,9 +152,9 @@
 
     retval = Matrix (dv(0), dv(1));
     double *vec = retval.fortran_vec ();
-    octave_idx_type nel = matrix.numel ();
+    octave_idx_type nel = m_matrix.numel ();
     for (octave_idx_type i = 0; i < nel; i++)
-      vec[i] = matrix(i).double_value ();
+      vec[i] = m_matrix(i).double_value ();
 
     return retval;
   }
@@ -169,9 +169,9 @@
 
     retval = FloatMatrix (dv(0), dv(1));
     float *vec = retval.fortran_vec ();
-    octave_idx_type nel = matrix.numel ();
+    octave_idx_type nel = m_matrix.numel ();
     for (octave_idx_type i = 0; i < nel; i++)
-      vec[i] = matrix(i).float_value ();
+      vec[i] = m_matrix(i).float_value ();
 
     return retval;
   }
@@ -186,9 +186,9 @@
 
     retval = ComplexMatrix (dv(0), dv(1));
     Complex *vec = retval.fortran_vec ();
-    octave_idx_type nel = matrix.numel ();
+    octave_idx_type nel = m_matrix.numel ();
     for (octave_idx_type i = 0; i < nel; i++)
-      vec[i] = Complex (matrix(i).double_value ());
+      vec[i] = Complex (m_matrix(i).double_value ());
 
     return retval;
   }
@@ -203,9 +203,9 @@
 
     retval = FloatComplexMatrix (dv(0), dv(1));
     FloatComplex *vec = retval.fortran_vec ();
-    octave_idx_type nel = matrix.numel ();
+    octave_idx_type nel = m_matrix.numel ();
     for (octave_idx_type i = 0; i < nel; i++)
-      vec[i] = FloatComplex (matrix(i).float_value ());
+      vec[i] = FloatComplex (m_matrix(i).float_value ());
 
     return retval;
   }
@@ -213,44 +213,44 @@
   NDArray
   array_value (bool = false) const
   {
-    NDArray retval (matrix.dims ());
+    NDArray retval (m_matrix.dims ());
     double *vec = retval.fortran_vec ();
-    octave_idx_type nel = matrix.numel ();
+    octave_idx_type nel = m_matrix.numel ();
     for (octave_idx_type i = 0; i < nel; i++)
-      vec[i] = matrix(i).double_value ();
+      vec[i] = m_matrix(i).double_value ();
     return retval;
   }
 
   FloatNDArray
   float_array_value (bool = false) const
   {
-    FloatNDArray retval (matrix.dims ());
+    FloatNDArray retval (m_matrix.dims ());
     float *vec = retval.fortran_vec ();
-    octave_idx_type nel = matrix.numel ();
+    octave_idx_type nel = m_matrix.numel ();
     for (octave_idx_type i = 0; i < nel; i++)
-      vec[i] = matrix(i).float_value ();
+      vec[i] = m_matrix(i).float_value ();
     return retval;
   }
 
   ComplexNDArray
   complex_array_value (bool = false) const
   {
-    ComplexNDArray retval (matrix.dims ());
+    ComplexNDArray retval (m_matrix.dims ());
     Complex *vec = retval.fortran_vec ();
-    octave_idx_type nel = matrix.numel ();
+    octave_idx_type nel = m_matrix.numel ();
     for (octave_idx_type i = 0; i < nel; i++)
-      vec[i] = Complex (matrix(i).double_value ());
+      vec[i] = Complex (m_matrix(i).double_value ());
     return retval;
   }
 
   FloatComplexNDArray
   float_complex_array_value (bool = false) const
   {
-    FloatComplexNDArray retval (matrix.dims ());
+    FloatComplexNDArray retval (m_matrix.dims ());
     FloatComplex *vec = retval.fortran_vec ();
-    octave_idx_type nel = matrix.numel ();
+    octave_idx_type nel = m_matrix.numel ();
     for (octave_idx_type i = 0; i < nel; i++)
-      vec[i] = FloatComplex (matrix(i).float_value ());
+      vec[i] = FloatComplex (m_matrix(i).float_value ());
     return retval;
   }
 
@@ -261,12 +261,12 @@
 
     octave_idx_type nel = numel ();
 
-    if (warn && matrix.any_element_not_one_or_zero ())
+    if (warn && m_matrix.any_element_not_one_or_zero ())
       warn_logical_conversion ();
 
     bool *vec = retval.fortran_vec ();
     for (octave_idx_type i = 0; i < nel; i++)
-      vec[i] = matrix(i).bool_value ();
+      vec[i] = m_matrix(i).bool_value ();
 
     return retval;
   }
@@ -280,7 +280,7 @@
 
     char *vec = retval.fortran_vec ();
     for (octave_idx_type i = 0; i < nel; i++)
-      vec[i] = matrix(i).char_value ();
+      vec[i] = m_matrix(i).char_value ();
 
     return retval;
   }
@@ -303,13 +303,14 @@
 
   octave::idx_vector index_vector (bool /* require_integers */ = false) const
   {
-    return idx_cache ? *idx_cache : set_idx_cache (octave::idx_vector (matrix));
+    return m_idx_cache ? *m_idx_cache
+                       : set_idx_cache (octave::idx_vector (m_matrix));
   }
 
   int write (octave::stream& os, int block_size,
              oct_data_conv::data_type output_type, int skip,
              octave::mach_info::float_format flt_fmt) const
-  { return os.write (matrix, block_size, output_type, skip, flt_fmt); }
+  { return os.write (m_matrix, block_size, output_type, skip, flt_fmt); }
 
   mxArray * as_mxArray (bool interleaved) const
   {
@@ -321,7 +322,7 @@
 
     mwSize nel = numel ();
 
-    const OCTAVE_INT_T *pdata = matrix.data ();
+    const OCTAVE_INT_T *pdata = m_matrix.data ();
 
     for (mwIndex i = 0; i < nel; i++)
       pd[i] = pdata[i].value ();
@@ -334,29 +335,29 @@
     switch (umap)
       {
       case umap_abs:
-        return matrix.abs ();
+        return m_matrix.abs ();
       case umap_signum:
-        return matrix.signum ();
+        return m_matrix.signum ();
       case umap_ceil:
       case umap_conj:
       case umap_fix:
       case umap_floor:
       case umap_real:
       case umap_round:
-        return matrix;
+        return m_matrix;
       case umap_imag:
-        return intNDArray<OCTAVE_INT_T> (matrix.dims (), OCTAVE_INT_T ());
+        return intNDArray<OCTAVE_INT_T> (m_matrix.dims (), OCTAVE_INT_T ());
       case umap_isnan:
       case umap_isna:
       case umap_isinf:
-        return boolNDArray (matrix.dims (), false);
+        return boolNDArray (m_matrix.dims (), false);
       case umap_isfinite:
-        return boolNDArray (matrix.dims (), true);
+        return boolNDArray (m_matrix.dims (), true);
 
       // Special cases for Matlab compatibility.
       case umap_xtolower:
       case umap_xtoupper:
-        return matrix;
+        return m_matrix;
 
       default:
         {
@@ -370,17 +371,17 @@
 
   bool save_hdf5 (octave_hdf5_id loc_id, const char *name, bool flag)
   {
-    return save_hdf5_internal (loc_id, hdf5_save_type, name, flag);
+    return save_hdf5_internal (loc_id, s_hdf5_save_type, name, flag);
   }
 
   bool load_hdf5 (octave_hdf5_id loc_id, const char *name)
   {
-    return load_hdf5_internal (loc_id, hdf5_save_type, name);
+    return load_hdf5_internal (loc_id, s_hdf5_save_type, name);
   }
 
 private:
 
-  static octave_hdf5_id hdf5_save_type;
+  static octave_hdf5_id s_hdf5_save_type;
 
   DECLARE_OV_TYPEID_FUNCTIONS_AND_DATA
 };
@@ -683,17 +684,17 @@
 
   bool save_hdf5 (octave_hdf5_id loc_id, const char *name, bool flag)
   {
-    return save_hdf5_internal (loc_id, hdf5_save_type, name, flag);
+    return save_hdf5_internal (loc_id, s_hdf5_save_type, name, flag);
   }
 
   bool load_hdf5 (octave_hdf5_id loc_id, const char *name)
   {
-    return load_hdf5_internal (loc_id, hdf5_save_type, name);
+    return load_hdf5_internal (loc_id, s_hdf5_save_type, name);
   }
 
 private:
 
-  static octave_hdf5_id hdf5_save_type;
+  static octave_hdf5_id s_hdf5_save_type;
 
   DECLARE_OV_TYPEID_FUNCTIONS_AND_DATA
 };
--- a/libinterp/octave-value/ov-java.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-java.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -1265,7 +1265,8 @@
 }
 
 static octave_value
-convert_to_string (JNIEnv *jni_env, jobject m_java_object, bool force, char type)
+convert_to_string (JNIEnv *jni_env, jobject m_java_object, bool force,
+                   char type)
 {
   octave_value retval;
 
@@ -1274,7 +1275,8 @@
       jclass_ref cls (jni_env, jni_env->FindClass ("java/lang/String"));
 
       if (jni_env->IsInstanceOf (m_java_object, cls))
-        retval = octave_value (jstring_to_string (jni_env, m_java_object), type);
+        retval = octave_value (jstring_to_string (jni_env, m_java_object),
+                               type);
       else if (force)
         {
           cls = jni_env->FindClass ("[Ljava/lang/String;");
@@ -2026,10 +2028,10 @@
 }
 
 JNIEXPORT jboolean JNICALL
-Java_org_octave_Octave_call (JNIEnv *env, jclass, jstring funcName,
+Java_org_octave_Octave_call (JNIEnv *env, jclass, jstring fcnName,
                              jobjectArray argin, jobjectArray argout)
 {
-  std::string fname = jstring_to_string (env, funcName);
+  std::string fname = jstring_to_string (env, fcnName);
 
   int nargout = env->GetArrayLength (argout);
   int nargin = env->GetArrayLength (argin);
@@ -2095,8 +2097,7 @@
 JNIEXPORT void JNICALL
 Java_org_octave_Octave_doEvalString (JNIEnv *env, jclass, jstring cmd)
 {
-  octave::interpreter& interp
-    = octave::__get_interpreter__ ("Java_org_octave_Octave_doEvalString");
+  octave::interpreter& interp = octave::__get_interpreter__ ();
 
   std::string s = jstring_to_string (env, cmd);
   int pstatus;
@@ -2366,7 +2367,8 @@
   JNIEnv *current_env = thread_jni_env ();
 
   if (current_env)
-    return convert_to_string (current_env, TO_JOBJECT (to_java ()), force, type);
+    return convert_to_string (current_env, TO_JOBJECT (to_java ()), force,
+                              type);
   else
     return octave_value ("");
 
@@ -3034,10 +3036,14 @@
 
 DEFUN (__java_init__, , ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} __java_init__ ()
-Internal function used @strong{only} when debugging Java interface.
-
-Function will directly call initialize_java to create an instance of a JVM.
+@deftypefn {} {@var{status} =} __java_init__ ()
+Internal function used @strong{only} when debugging the Java interface.
+
+This function will directly call @code{initialize_java} to create an instance
+of a JVM.
+
+The return variable @var{status} is 1 if the Java interface has been created,
+and 0 otherwise.
 @end deftypefn */)
 {
 #if defined (HAVE_JAVA)
@@ -3062,8 +3068,7 @@
 @deftypefn {} {} __java_exit__ ()
 Internal function used @strong{only} when debugging Java interface.
 
-Function will directly call terminate_jvm to destroy the current JVM
-instance.
+Function will directly call terminate_jvm to destroy the current JVM instance.
 @end deftypefn */)
 {
 #if defined (HAVE_JAVA)
@@ -3334,7 +3339,7 @@
 
 DEFUN (__java2mat__, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} __java2mat__ (@var{javaobj})
+@deftypefn {} {@var{mat} =} __java2mat__ (@var{javaobj})
 Undocumented internal function.
 @end deftypefn */)
 {
@@ -3372,7 +3377,7 @@
        doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} java_matrix_autoconversion ()
 @deftypefnx {} {@var{old_val} =} java_matrix_autoconversion (@var{new_val})
-@deftypefnx {} {} java_matrix_autoconversion (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} java_matrix_autoconversion (@var{new_val}, "local")
 Query or set the internal variable that controls whether Java arrays are
 automatically converted to Octave matrices.
 
@@ -3403,7 +3408,7 @@
        doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} java_unsigned_autoconversion ()
 @deftypefnx {} {@var{old_val} =} java_unsigned_autoconversion (@var{new_val})
-@deftypefnx {} {} java_unsigned_autoconversion (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} java_unsigned_autoconversion (@var{new_val}, "local")
 Query or set the internal variable that controls how integer classes are
 converted when @code{java_matrix_autoconversion} is enabled.
 
@@ -3435,7 +3440,7 @@
        doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} debug_java ()
 @deftypefnx {} {@var{old_val} =} debug_java (@var{new_val})
-@deftypefnx {} {} debug_java (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} debug_java (@var{new_val}, "local")
 Query or set the internal variable that determines whether extra debugging
 information regarding the initialization of the JVM and any Java exceptions
 is printed.
@@ -3466,7 +3471,7 @@
 
 DEFUN (isjava, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} isjava (@var{x})
+@deftypefn {} {@var{tf} =} isjava (@var{x})
 Return true if @var{x} is a Java object.
 @seealso{class, typeinfo, isa, javaObject}
 @end deftypefn */)
@@ -3494,14 +3499,22 @@
 
 ## Check we can create objects that wrap java literals
 %!testif HAVE_JAVA; usejava ("jvm") <*38821>
-%! assert (class (javaObject ("java.lang.Byte",     uint8 (1))), "java.lang.Byte");
-%! assert (class (javaObject ("java.lang.Byte",      int8 (1))), "java.lang.Byte");
-%! assert (class (javaObject ("java.lang.Short",   uint16 (1))), "java.lang.Short");
-%! assert (class (javaObject ("java.lang.Short",    int16 (1))), "java.lang.Short");
-%! assert (class (javaObject ("java.lang.Integer", uint32 (1))), "java.lang.Integer");
-%! assert (class (javaObject ("java.lang.Integer",  int32 (1))), "java.lang.Integer");
-%! assert (class (javaObject ("java.lang.Long",    uint64 (1))), "java.lang.Long");
-%! assert (class (javaObject ("java.lang.Long",     int64 (1))), "java.lang.Long");
+%! assert (class (javaObject ("java.lang.Byte",     uint8 (1))),
+%!         "java.lang.Byte");
+%! assert (class (javaObject ("java.lang.Byte",      int8 (1))),
+%!         "java.lang.Byte");
+%! assert (class (javaObject ("java.lang.Short",   uint16 (1))),
+%!         "java.lang.Short");
+%! assert (class (javaObject ("java.lang.Short",    int16 (1))),
+%!         "java.lang.Short");
+%! assert (class (javaObject ("java.lang.Integer", uint32 (1))),
+%!         "java.lang.Integer");
+%! assert (class (javaObject ("java.lang.Integer",  int32 (1))),
+%!         "java.lang.Integer");
+%! assert (class (javaObject ("java.lang.Long",    uint64 (1))),
+%!         "java.lang.Long");
+%! assert (class (javaObject ("java.lang.Long",     int64 (1))),
+%!         "java.lang.Long");
 
 ## More checks of java numeric and boolean class instances
 %!testif HAVE_JAVA; usejava ("jvm")
@@ -3559,8 +3572,10 @@
 %! assert (javaMethod ("valueOf", "java.lang.Long",    int64 (1)), 1)
 %! assert (javaMethod ("valueOf", "java.lang.Float",  single (1)), 1)
 %! assert (javaMethod ("valueOf", "java.lang.Double", double (1)), 1)
-%! assert (class (javaMethod ("valueOf", "java.math.BigDecimal", double (1))), "java.math.BigDecimal")
-%! assert (class (javaMethod ("valueOf", "java.math.BigInteger",  int64 (1))), "java.math.BigInteger")
+%! assert (class (javaMethod ("valueOf", "java.math.BigDecimal", double (1))),
+%!         "java.math.BigDecimal")
+%! assert (class (javaMethod ("valueOf", "java.math.BigInteger",  int64 (1))),
+%!         "java.math.BigInteger")
 
 ## Automatic conversion from string cell array into String[]
 %!testif HAVE_JAVA; usejava ("jvm") <*45290>
--- a/libinterp/octave-value/ov-lazy-idx.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-lazy-idx.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -99,7 +99,8 @@
 octave_value
 octave_lazy_index::squeeze (void) const
 {
-  return octave::idx_vector (m_index.as_array ().squeeze (), m_index.extent (0));
+  return octave::idx_vector (m_index.as_array ().squeeze (),
+                             m_index.extent (0));
 }
 
 octave_value
--- a/libinterp/octave-value/ov-lazy-idx.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-lazy-idx.h	Mon Aug 29 13:58:00 2022 +0200
@@ -60,7 +60,8 @@
 
   octave_value fast_elem_extract (octave_idx_type n) const;
 
-  std::size_t byte_size (void) const { return numel () * sizeof (octave_idx_type); }
+  std::size_t byte_size (void) const
+  { return numel () * sizeof (octave_idx_type); }
 
   octave_value squeeze (void) const;
 
--- a/libinterp/octave-value/ov-mex-fcn.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-mex-fcn.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -73,8 +73,7 @@
   if (m_exit_fcn_ptr)
     (*m_exit_fcn_ptr) ();
 
-  octave::dynamic_loader& dyn_loader
-    = octave::__get_dynamic_loader__ ("~octave_mex_function");
+  octave::dynamic_loader& dyn_loader = octave::__get_dynamic_loader__ ();
 
   dyn_loader.remove_mex (m_name, m_sh_lib);
 }
@@ -91,25 +90,9 @@
   return m_sh_lib.time_loaded ();
 }
 
-// FIXME: shouldn't this declaration be a header file somewhere?
-extern octave_value_list
-call_mex (octave_mex_function& curr_mex_fcn, const octave_value_list& args,
-          int nargout);
-
 octave_value_list
 octave_mex_function::execute (octave::tree_evaluator& tw, int nargout,
                               const octave_value_list& args)
 {
-  octave_value_list retval;
-
-  if (args.has_magic_colon ())
-    error ("invalid use of colon in function argument list");
-
-  octave::profiler& profiler = tw.get_profiler ();
-
-  octave::profiler::enter<octave_mex_function> block (profiler, *this);
-
-  retval = call_mex (*this, args, nargout);
-
-  return retval;
+  return tw.execute_mex_function (*this, nargout, args);
 }
--- a/libinterp/octave-value/ov-mex-fcn.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-mex-fcn.h	Mon Aug 29 13:58:00 2022 +0200
@@ -63,9 +63,9 @@
 
   // No copying!
 
-  octave_mex_function (const octave_mex_function& fn) = delete;
+  octave_mex_function (const octave_mex_function& fcn) = delete;
 
-  octave_mex_function& operator = (const octave_mex_function& fn) = delete;
+  octave_mex_function& operator = (const octave_mex_function& fcn) = delete;
 
   ~octave_mex_function (void);
 
--- a/libinterp/octave-value/ov-null-mat.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-null-mat.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -100,7 +100,7 @@
 
 DEFUN (isnull, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} isnull (@var{x})
+@deftypefn {} {@var{tf} =} isnull (@var{x})
 Return true if @var{x} is a special null matrix, string, or single quoted
 string.
 
--- a/libinterp/octave-value/ov-oncleanup.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-oncleanup.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -164,8 +164,7 @@
   frame.protect_var (quit_allowed);
   quit_allowed = false;
 
-  octave::interpreter& interp
-    = octave::__get_interpreter__ ("octave_oncleanup::call_object_destructor");
+  octave::interpreter& interp = octave::__get_interpreter__ ();
 
   octave::interpreter_try (frame);
 
--- a/libinterp/octave-value/ov-range.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-range.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -1079,7 +1079,8 @@
     }
 #  if defined (HAVE_HDF5_18)
   data_hid = H5Dcreate (loc_id, name, type_hid, space_hid,
-                        octave_H5P_DEFAULT, octave_H5P_DEFAULT, octave_H5P_DEFAULT);
+                        octave_H5P_DEFAULT, octave_H5P_DEFAULT,
+                        octave_H5P_DEFAULT);
 #  else
   data_hid = H5Dcreate (loc_id, name, type_hid, space_hid, octave_H5P_DEFAULT);
 #  endif
--- a/libinterp/octave-value/ov-re-mat.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-re-mat.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -110,8 +110,8 @@
 {
   octave_base_value *retval = nullptr;
 
-  if (matrix.numel () == 1)
-    retval = new octave_scalar (matrix (0));
+  if (m_matrix.numel () == 1)
+    retval = new octave_scalar (m_matrix (0));
 
   return retval;
 }
@@ -125,7 +125,7 @@
   warn_implicit_conversion ("Octave:array-to-scalar",
                             "real matrix", "real scalar");
 
-  return matrix(0, 0);
+  return m_matrix(0, 0);
 }
 
 float
@@ -137,7 +137,7 @@
   warn_implicit_conversion ("Octave:array-to-scalar",
                             "real matrix", "real scalar");
 
-  return matrix(0, 0);
+  return m_matrix(0, 0);
 }
 
 // FIXME
@@ -145,13 +145,13 @@
 Matrix
 octave_matrix::matrix_value (bool) const
 {
-  return Matrix (matrix);
+  return Matrix (m_matrix);
 }
 
 FloatMatrix
 octave_matrix::float_matrix_value (bool) const
 {
-  return FloatMatrix (Matrix (matrix));
+  return FloatMatrix (Matrix (m_matrix));
 }
 
 Complex
@@ -163,7 +163,7 @@
   warn_implicit_conversion ("Octave:array-to-scalar",
                             "real matrix", "complex scalar");
 
-  return Complex (matrix(0, 0), 0);
+  return Complex (m_matrix(0, 0), 0);
 }
 
 FloatComplex
@@ -179,7 +179,7 @@
   warn_implicit_conversion ("Octave:array-to-scalar",
                             "real matrix", "complex scalar");
 
-  retval = matrix(0, 0);
+  retval = m_matrix(0, 0);
 
   return retval;
 }
@@ -189,36 +189,36 @@
 ComplexMatrix
 octave_matrix::complex_matrix_value (bool) const
 {
-  return ComplexMatrix (Matrix (matrix));
+  return ComplexMatrix (Matrix (m_matrix));
 }
 
 FloatComplexMatrix
 octave_matrix::float_complex_matrix_value (bool) const
 {
-  return FloatComplexMatrix (Matrix (matrix));
+  return FloatComplexMatrix (Matrix (m_matrix));
 }
 
 ComplexNDArray
 octave_matrix::complex_array_value (bool) const
 {
-  return ComplexNDArray (matrix);
+  return ComplexNDArray (m_matrix);
 }
 
 FloatComplexNDArray
 octave_matrix::float_complex_array_value (bool) const
 {
-  return FloatComplexNDArray (matrix);
+  return FloatComplexNDArray (m_matrix);
 }
 
 boolNDArray
 octave_matrix::bool_array_value (bool warn) const
 {
-  if (matrix.any_element_is_nan ())
+  if (m_matrix.any_element_is_nan ())
     octave::err_nan_to_logical_conversion ();
-  if (warn && matrix.any_element_not_one_or_zero ())
+  if (warn && m_matrix.any_element_not_one_or_zero ())
     warn_logical_conversion ();
 
-  return boolNDArray (matrix);
+  return boolNDArray (m_matrix);
 }
 
 charNDArray
@@ -229,7 +229,7 @@
   octave_idx_type nel = numel ();
 
   for (octave_idx_type i = 0; i < nel; i++)
-    retval.elem (i) = static_cast<char> (matrix.elem (i));
+    retval.elem (i) = static_cast<char> (m_matrix.elem (i));
 
   return retval;
 }
@@ -237,7 +237,7 @@
 SparseMatrix
 octave_matrix::sparse_matrix_value (bool) const
 {
-  return SparseMatrix (Matrix (matrix));
+  return SparseMatrix (Matrix (m_matrix));
 }
 
 SparseComplexMatrix
@@ -252,70 +252,70 @@
 octave_value
 octave_matrix::as_double (void) const
 {
-  return NDArray (matrix);
+  return NDArray (m_matrix);
 }
 
 octave_value
 octave_matrix::as_single (void) const
 {
-  return FloatNDArray (matrix);
+  return FloatNDArray (m_matrix);
 }
 
 octave_value
 octave_matrix::as_int8 (void) const
 {
-  return int8NDArray (matrix);
+  return int8NDArray (m_matrix);
 }
 
 octave_value
 octave_matrix::as_int16 (void) const
 {
-  return int16NDArray (matrix);
+  return int16NDArray (m_matrix);
 }
 
 octave_value
 octave_matrix::as_int32 (void) const
 {
-  return int32NDArray (matrix);
+  return int32NDArray (m_matrix);
 }
 
 octave_value
 octave_matrix::as_int64 (void) const
 {
-  return int64NDArray (matrix);
+  return int64NDArray (m_matrix);
 }
 
 octave_value
 octave_matrix::as_uint8 (void) const
 {
-  return uint8NDArray (matrix);
+  return uint8NDArray (m_matrix);
 }
 
 octave_value
 octave_matrix::as_uint16 (void) const
 {
-  return uint16NDArray (matrix);
+  return uint16NDArray (m_matrix);
 }
 
 octave_value
 octave_matrix::as_uint32 (void) const
 {
-  return uint32NDArray (matrix);
+  return uint32NDArray (m_matrix);
 }
 
 octave_value
 octave_matrix::as_uint64 (void) const
 {
-  return uint64NDArray (matrix);
+  return uint64NDArray (m_matrix);
 }
 
 octave_value
 octave_matrix::diag (octave_idx_type k) const
 {
   octave_value retval;
-  if (k == 0 && matrix.ndims () == 2
-      && (matrix.rows () == 1 || matrix.columns () == 1))
-    retval = DiagMatrix (DiagArray2<double> (matrix));
+  if (k == 0 && m_matrix.ndims () == 2
+      && (m_matrix.rows () == 1 || m_matrix.columns () == 1))
+    retval = DiagMatrix (DiagArray2<double> (m_matrix));
   else
     retval = octave_base_matrix<NDArray>::diag (k);
 
@@ -325,11 +325,11 @@
 octave_value
 octave_matrix::diag (octave_idx_type m, octave_idx_type n) const
 {
-  if (matrix.ndims () != 2
-      || (matrix.rows () != 1 && matrix.columns () != 1))
+  if (m_matrix.ndims () != 2
+      || (m_matrix.rows () != 1 && m_matrix.columns () != 1))
     error ("diag: expecting vector argument");
 
-  Matrix mat (matrix);
+  Matrix mat (m_matrix);
 
   return mat.diag (m, n);
 }
@@ -339,11 +339,11 @@
 octave_value
 octave_matrix::reshape (const dim_vector& new_dims) const
 {
-  if (idx_cache)
+  if (m_idx_cache)
     {
-      return new octave_matrix (matrix.reshape (new_dims),
-                                octave::idx_vector (idx_cache->as_array ().reshape (new_dims),
-                                                    idx_cache->extent (0)));
+      return new octave_matrix (m_matrix.reshape (new_dims),
+                                octave::idx_vector (m_idx_cache->as_array ().reshape (new_dims),
+                                                    m_idx_cache->extent (0)));
     }
   else
     return octave_base_matrix<NDArray>::reshape (new_dims);
@@ -352,11 +352,11 @@
 octave_value
 octave_matrix::squeeze (void) const
 {
-  if (idx_cache)
+  if (m_idx_cache)
     {
-      return new octave_matrix (matrix.squeeze (),
-                                octave::idx_vector (idx_cache->as_array ().squeeze (),
-                                                    idx_cache->extent (0)));
+      return new octave_matrix (m_matrix.squeeze (),
+                                octave::idx_vector (m_idx_cache->as_array ().squeeze (),
+                                                    m_idx_cache->extent (0)));
     }
   else
     return octave_base_matrix<NDArray>::squeeze ();
@@ -365,11 +365,11 @@
 octave_value
 octave_matrix::sort (octave_idx_type dim, sortmode mode) const
 {
-  if (idx_cache)
+  if (m_idx_cache)
     {
       // This is a valid index matrix, so sort via integers because it's
       // generally more efficient.
-      return octave_lazy_index (*idx_cache).sort (dim, mode);
+      return octave_lazy_index (*m_idx_cache).sort (dim, mode);
     }
   else
     return octave_base_matrix<NDArray>::sort (dim, mode);
@@ -379,11 +379,11 @@
 octave_matrix::sort (Array<octave_idx_type>& sidx, octave_idx_type dim,
                      sortmode mode) const
 {
-  if (idx_cache)
+  if (m_idx_cache)
     {
       // This is a valid index matrix, so sort via integers because it's
       // generally more efficient.
-      return octave_lazy_index (*idx_cache).sort (sidx, dim, mode);
+      return octave_lazy_index (*m_idx_cache).sort (sidx, dim, mode);
     }
   else
     return octave_base_matrix<NDArray>::sort (sidx, dim, mode);
@@ -392,11 +392,11 @@
 sortmode
 octave_matrix::issorted (sortmode mode) const
 {
-  if (idx_cache)
+  if (m_idx_cache)
     {
       // This is a valid index matrix, so check via integers because it's
       // generally more efficient.
-      return idx_cache->as_array ().issorted (mode);
+      return m_idx_cache->as_array ().issorted (mode);
     }
   else
     return octave_base_matrix<NDArray>::issorted (mode);
@@ -404,11 +404,11 @@
 Array<octave_idx_type>
 octave_matrix::sort_rows_idx (sortmode mode) const
 {
-  if (idx_cache)
+  if (m_idx_cache)
     {
       // This is a valid index matrix, so sort via integers because it's
       // generally more efficient.
-      return octave_lazy_index (*idx_cache).sort_rows_idx (mode);
+      return octave_lazy_index (*m_idx_cache).sort_rows_idx (mode);
     }
   else
     return octave_base_matrix<NDArray>::sort_rows_idx (mode);
@@ -417,11 +417,11 @@
 sortmode
 octave_matrix::is_sorted_rows (sortmode mode) const
 {
-  if (idx_cache)
+  if (m_idx_cache)
     {
       // This is a valid index matrix, so check via integers because it's
       // generally more efficient.
-      return idx_cache->as_array ().is_sorted_rows (mode);
+      return m_idx_cache->as_array ().is_sorted_rows (mode);
     }
   else
     return octave_base_matrix<NDArray>::is_sorted_rows (mode);
@@ -442,7 +442,7 @@
     {
       octave_quit ();
 
-      double d = matrix(i);
+      double d = m_matrix(i);
 
       if (octave::math::isnan (d))
         octave::err_nan_to_character_conversion ();
@@ -545,7 +545,7 @@
       if (! is)
         error ("load: failed to load matrix constant");
 
-      matrix = tmp;
+      m_matrix = tmp;
     }
   else if (kw == "rows")
     {
@@ -562,10 +562,10 @@
           if (! is)
             error ("load: failed to load matrix constant");
 
-          matrix = tmp;
+          m_matrix = tmp;
         }
       else if (nr == 0 || nc == 0)
-        matrix = Matrix (nr, nc);
+        m_matrix = Matrix (nr, nc);
       else
         panic_impossible ();
     }
@@ -666,7 +666,7 @@
       if (! is)
         return false;
 
-      matrix = m;
+      m_matrix = m;
     }
   else
     {
@@ -686,7 +686,7 @@
       if (! is)
         return false;
 
-      matrix = m;
+      m_matrix = m;
     }
   return true;
 }
@@ -745,7 +745,8 @@
 
 #if defined (HAVE_HDF5_18)
   data_hid = H5Dcreate (loc_id, name, save_type_hid, space_hid,
-                        octave_H5P_DEFAULT, octave_H5P_DEFAULT, octave_H5P_DEFAULT);
+                        octave_H5P_DEFAULT, octave_H5P_DEFAULT,
+                        octave_H5P_DEFAULT);
 #else
   data_hid = H5Dcreate (loc_id, name, save_type_hid, space_hid,
                         octave_H5P_DEFAULT);
@@ -757,8 +758,8 @@
     }
 
   double *mtmp = m.fortran_vec ();
-  retval = H5Dwrite (data_hid, H5T_NATIVE_DOUBLE, octave_H5S_ALL, octave_H5S_ALL,
-                     octave_H5P_DEFAULT, mtmp) >= 0;
+  retval = H5Dwrite (data_hid, H5T_NATIVE_DOUBLE, octave_H5S_ALL,
+                     octave_H5S_ALL, octave_H5P_DEFAULT, mtmp) >= 0;
 
   H5Dclose (data_hid);
   H5Sclose (space_hid);
@@ -784,7 +785,7 @@
   dim_vector dv;
   int empty = load_hdf5_empty (loc_id, name, dv);
   if (empty > 0)
-    matrix.resize (dv);
+    m_matrix.resize (dv);
   if (empty)
     return (empty > 0);
 
@@ -829,7 +830,7 @@
                octave_H5P_DEFAULT, re) >= 0)
     {
       retval = true;
-      matrix = m;
+      m_matrix = m;
     }
 
   H5Sclose (space_id);
@@ -849,7 +850,7 @@
 octave_matrix::print_raw (std::ostream& os,
                           bool pr_as_read_syntax) const
 {
-  octave_print_internal (os, matrix, pr_as_read_syntax,
+  octave_print_internal (os, m_matrix, pr_as_read_syntax,
                          current_print_indent_level ());
 }
 
@@ -862,7 +863,7 @@
 
   mwSize nel = numel ();
 
-  const double *pdata = matrix.data ();
+  const double *pdata = m_matrix.data ();
 
   for (mwIndex i = 0; i < nel; i++)
     pd[i] = pdata[i];
@@ -915,16 +916,16 @@
   switch (umap)
     {
     case umap_imag:
-      return NDArray (matrix.dims (), 0.0);
+      return NDArray (m_matrix.dims (), 0.0);
 
     case umap_real:
     case umap_conj:
-      return matrix;
+      return m_matrix;
 
     // Mappers handled specially.
 #define ARRAY_METHOD_MAPPER(UMAP, FCN)        \
     case umap_ ## UMAP:                       \
-      return octave_value (matrix.FCN ())
+      return octave_value (m_matrix.FCN ())
 
     ARRAY_METHOD_MAPPER (abs, abs);
     ARRAY_METHOD_MAPPER (isnan, isnan);
@@ -933,11 +934,11 @@
 
 #define ARRAY_MAPPER(UMAP, TYPE, FCN)                 \
     case umap_ ## UMAP:                               \
-      return octave_value (matrix.map<TYPE> (FCN))
+      return octave_value (m_matrix.map<TYPE> (FCN))
 
 #define RC_ARRAY_MAPPER(UMAP, TYPE, FCN)      \
     case umap_ ## UMAP:                       \
-      return do_rc_map (matrix, FCN)
+      return do_rc_map (m_matrix, FCN)
 
     RC_ARRAY_MAPPER (acos, Complex, octave::math::rc_acos);
     RC_ARRAY_MAPPER (acosh, Complex, octave::math::rc_acosh);
@@ -982,7 +983,7 @@
     // Special cases for Matlab compatibility.
     case umap_xtolower:
     case umap_xtoupper:
-      return matrix;
+      return m_matrix;
 
     case umap_xisalnum:
     case umap_xisalpha:
--- a/libinterp/octave-value/ov-re-mat.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-re-mat.h	Mon Aug 29 13:58:00 2022 +0200
@@ -106,7 +106,10 @@
   octave_base_value * try_narrowing_conversion (void);
 
   octave::idx_vector index_vector (bool /* require_integers */ = false) const
-  { return idx_cache ? *idx_cache : set_idx_cache (octave::idx_vector (matrix)); }
+  {
+    return m_idx_cache ? *m_idx_cache
+                     : set_idx_cache (octave::idx_vector (m_matrix));
+  }
 
   builtin_type_t builtin_type (void) const { return btyp_double; }
 
@@ -119,28 +122,28 @@
   bool isfloat (void) const { return true; }
 
   int8NDArray
-  int8_array_value (void) const { return int8NDArray (matrix); }
+  int8_array_value (void) const { return int8NDArray (m_matrix); }
 
   int16NDArray
-  int16_array_value (void) const { return int16NDArray (matrix); }
+  int16_array_value (void) const { return int16NDArray (m_matrix); }
 
   int32NDArray
-  int32_array_value (void) const { return int32NDArray (matrix); }
+  int32_array_value (void) const { return int32NDArray (m_matrix); }
 
   int64NDArray
-  int64_array_value (void) const { return int64NDArray (matrix); }
+  int64_array_value (void) const { return int64NDArray (m_matrix); }
 
   uint8NDArray
-  uint8_array_value (void) const { return uint8NDArray (matrix); }
+  uint8_array_value (void) const { return uint8NDArray (m_matrix); }
 
   uint16NDArray
-  uint16_array_value (void) const { return uint16NDArray (matrix); }
+  uint16_array_value (void) const { return uint16NDArray (m_matrix); }
 
   uint32NDArray
-  uint32_array_value (void) const { return uint32NDArray (matrix); }
+  uint32_array_value (void) const { return uint32NDArray (m_matrix); }
 
   uint64NDArray
-  uint64_array_value (void) const { return uint64NDArray (matrix); }
+  uint64_array_value (void) const { return uint64NDArray (m_matrix); }
 
   double double_value (bool = false) const;
 
@@ -169,9 +172,9 @@
 
   charNDArray char_array_value (bool = false) const;
 
-  NDArray array_value (bool = false) const { return matrix; }
+  NDArray array_value (bool = false) const { return m_matrix; }
 
-  FloatNDArray float_array_value (bool = false) const { return matrix; }
+  FloatNDArray float_array_value (bool = false) const { return m_matrix; }
 
   SparseMatrix sparse_matrix_value (bool = false) const;
 
@@ -235,7 +238,7 @@
   int write (octave::stream& os, int block_size,
              oct_data_conv::data_type output_type, int skip,
              octave::mach_info::float_format flt_fmt) const
-  { return os.write (matrix, block_size, output_type, skip, flt_fmt); }
+  { return os.write (m_matrix, block_size, output_type, skip, flt_fmt); }
 
   mxArray * as_mxArray (bool interleaved) const;
 
--- a/libinterp/octave-value/ov-re-sparse.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-re-sparse.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -69,32 +69,6 @@
     }
 }
 
-octave_base_value *
-octave_sparse_matrix::try_narrowing_conversion (void)
-{
-  octave_base_value *retval = nullptr;
-
-  if (Vsparse_auto_mutate)
-    {
-      // Don't use numel, since it can overflow for very large matrices
-      // Note that for the second test, this means it becomes approximative
-      // since it involves a cast to double to avoid issues of overflow
-      if (matrix.rows () == 1 && matrix.cols () == 1)
-        {
-          // Const copy of the matrix, so the right version of () operator used
-          const SparseMatrix tmp (matrix);
-
-          retval = new octave_scalar (tmp (0));
-        }
-      else if (matrix.cols () > 0 && matrix.rows () > 0
-               && (double (matrix.byte_size ()) > double (matrix.rows ())
-                   * double (matrix.cols ()) * sizeof (double)))
-        retval = new octave_matrix (matrix.matrix_value ());
-    }
-
-  return retval;
-}
-
 double
 octave_sparse_matrix::double_value (bool) const
 {
@@ -421,7 +395,8 @@
     }
 #if defined (HAVE_HDF5_18)
   data_hid = H5Dcreate (group_hid, "nr", H5T_NATIVE_IDX, space_hid,
-                        octave_H5P_DEFAULT, octave_H5P_DEFAULT, octave_H5P_DEFAULT);
+                        octave_H5P_DEFAULT, octave_H5P_DEFAULT,
+                        octave_H5P_DEFAULT);
 #else
   data_hid = H5Dcreate (group_hid, "nr", H5T_NATIVE_IDX, space_hid,
                         octave_H5P_DEFAULT);
@@ -445,7 +420,8 @@
     }
 #if defined (HAVE_HDF5_18)
   data_hid = H5Dcreate (group_hid, "nc", H5T_NATIVE_IDX, space_hid,
-                        octave_H5P_DEFAULT, octave_H5P_DEFAULT, octave_H5P_DEFAULT);
+                        octave_H5P_DEFAULT, octave_H5P_DEFAULT,
+                        octave_H5P_DEFAULT);
 #else
   data_hid = H5Dcreate (group_hid, "nc", H5T_NATIVE_IDX, space_hid,
                         octave_H5P_DEFAULT);
@@ -470,7 +446,8 @@
 
 #if defined (HAVE_HDF5_18)
   data_hid = H5Dcreate (group_hid, "nz", H5T_NATIVE_IDX, space_hid,
-                        octave_H5P_DEFAULT, octave_H5P_DEFAULT, octave_H5P_DEFAULT);
+                        octave_H5P_DEFAULT, octave_H5P_DEFAULT,
+                        octave_H5P_DEFAULT);
 #else
   data_hid = H5Dcreate (group_hid, "nz", H5T_NATIVE_IDX, space_hid,
                         octave_H5P_DEFAULT);
@@ -508,7 +485,8 @@
 
 #if defined (HAVE_HDF5_18)
   data_hid = H5Dcreate (group_hid, "cidx", H5T_NATIVE_IDX, space_hid,
-                        octave_H5P_DEFAULT, octave_H5P_DEFAULT, octave_H5P_DEFAULT);
+                        octave_H5P_DEFAULT, octave_H5P_DEFAULT,
+                        octave_H5P_DEFAULT);
 #else
   data_hid = H5Dcreate (group_hid, "cidx", H5T_NATIVE_IDX, space_hid,
                         octave_H5P_DEFAULT);
@@ -545,7 +523,8 @@
     }
 #if defined (HAVE_HDF5_18)
   data_hid = H5Dcreate (group_hid, "ridx", H5T_NATIVE_IDX, space_hid,
-                        octave_H5P_DEFAULT, octave_H5P_DEFAULT, octave_H5P_DEFAULT);
+                        octave_H5P_DEFAULT, octave_H5P_DEFAULT,
+                        octave_H5P_DEFAULT);
 #else
   data_hid = H5Dcreate (group_hid, "ridx", H5T_NATIVE_IDX, space_hid,
                         octave_H5P_DEFAULT);
@@ -594,7 +573,8 @@
 
 #if defined (HAVE_HDF5_18)
   data_hid = H5Dcreate (group_hid, "data", save_type_hid, space_hid,
-                        octave_H5P_DEFAULT, octave_H5P_DEFAULT, octave_H5P_DEFAULT);
+                        octave_H5P_DEFAULT, octave_H5P_DEFAULT,
+                        octave_H5P_DEFAULT);
 #else
   data_hid = H5Dcreate (group_hid, "data", save_type_hid, space_hid,
                         octave_H5P_DEFAULT);
@@ -607,8 +587,8 @@
     }
 
   double *dtmp = m.xdata ();
-  retval = H5Dwrite (data_hid, H5T_NATIVE_DOUBLE, octave_H5S_ALL, octave_H5S_ALL,
-                     octave_H5P_DEFAULT, dtmp) >= 0;
+  retval = H5Dwrite (data_hid, H5T_NATIVE_DOUBLE, octave_H5S_ALL,
+                     octave_H5S_ALL, octave_H5P_DEFAULT, dtmp) >= 0;
   H5Dclose (data_hid);
   H5Sclose (space_hid);
   H5Gclose (group_hid);
--- a/libinterp/octave-value/ov-re-sparse.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-re-sparse.h	Mon Aug 29 13:58:00 2022 +0200
@@ -91,8 +91,6 @@
   octave_base_value * empty_clone (void) const
   { return new octave_sparse_matrix (); }
 
-  octave_base_value * try_narrowing_conversion (void);
-
   octave::idx_vector index_vector (bool require_integers = false) const;
 
   builtin_type_t builtin_type (void) const { return btyp_double; }
--- a/libinterp/octave-value/ov-scalar.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-scalar.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -283,7 +283,8 @@
 
 #if defined (HAVE_HDF5_18)
   data_hid = H5Dcreate (loc_id, name, H5T_NATIVE_DOUBLE, space_hid,
-                        octave_H5P_DEFAULT, octave_H5P_DEFAULT, octave_H5P_DEFAULT);
+                        octave_H5P_DEFAULT, octave_H5P_DEFAULT,
+                        octave_H5P_DEFAULT);
 #else
   data_hid = H5Dcreate (loc_id, name, H5T_NATIVE_DOUBLE, space_hid,
                         octave_H5P_DEFAULT);
@@ -295,8 +296,8 @@
     }
 
   double tmp = double_value ();
-  retval = H5Dwrite (data_hid, H5T_NATIVE_DOUBLE, octave_H5S_ALL, octave_H5S_ALL,
-                     octave_H5P_DEFAULT, &tmp) >= 0;
+  retval = H5Dwrite (data_hid, H5T_NATIVE_DOUBLE, octave_H5S_ALL,
+                     octave_H5S_ALL, octave_H5P_DEFAULT, &tmp) >= 0;
 
   H5Dclose (data_hid);
   H5Sclose (space_hid);
--- a/libinterp/octave-value/ov-str-mat.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-str-mat.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -105,14 +105,14 @@
       switch (len)
         {
         case 0:
-          retval = octave_value (matrix, type);
+          retval = octave_value (m_matrix, type);
           break;
 
         case 1:
           {
             octave::idx_vector i = idx (0).index_vector ();
 
-            retval = octave_value (charNDArray (matrix.index (i, resize_ok)),
+            retval = octave_value (charNDArray (m_matrix.index (i, resize_ok)),
                                    type);
           }
           break;
@@ -123,7 +123,7 @@
             k = 1;
             octave::idx_vector j = idx (1).index_vector ();
 
-            retval = octave_value (charNDArray (matrix.index (i, j, resize_ok)),
+            retval = octave_value (charNDArray (m_matrix.index (i, j, resize_ok)),
                                    type);
           }
           break;
@@ -135,7 +135,7 @@
             for (k = 0; k < len; k++)
               idx_vec(k) = idx(k).index_vector ();
 
-            retval = octave_value (charNDArray (matrix.index (idx_vec, resize_ok)), type);
+            retval = octave_value (charNDArray (m_matrix.index (idx_vec, resize_ok)), type);
           }
           break;
         }
@@ -153,7 +153,7 @@
 octave_value
 octave_char_matrix_str::resize (const dim_vector& dv, bool fill) const
 {
-  charNDArray retval (matrix);
+  charNDArray retval (m_matrix);
   if (fill)
     retval.resize (dv, 0);
   else
@@ -211,10 +211,10 @@
 {
   string_vector retval;
 
-  if (matrix.ndims () != 2)
+  if (m_matrix.ndims () != 2)
     error ("invalid conversion of charNDArray to string_vector");
 
-  charMatrix chm (matrix);
+  charMatrix chm (m_matrix);
 
   octave_idx_type n = chm.rows ();
 
@@ -229,10 +229,10 @@
 std::string
 octave_char_matrix_str::string_value (bool) const
 {
-  if (matrix.ndims () != 2)
+  if (m_matrix.ndims () != 2)
     error ("invalid conversion of charNDArray to string");
 
-  charMatrix chm (matrix);
+  charMatrix chm (m_matrix);
 
   if (chm.rows () > 1)
     warning_with_id ("Octave:charmat-truncated",
@@ -256,10 +256,10 @@
 {
   Array<std::string> retval;
 
-  if (matrix.ndims () != 2)
+  if (m_matrix.ndims () != 2)
     error ("cellstr: cannot convert multidimensional arrays");
 
-  const charMatrix chm (matrix);
+  const charMatrix chm (m_matrix);
   octave_idx_type nr = chm.rows ();
   retval.clear (nr, 1);
   for (octave_idx_type i = 0; i < nr; i++)
@@ -272,16 +272,16 @@
 octave_char_matrix_str::print_raw (std::ostream& os,
                                    bool pr_as_read_syntax) const
 {
-  octave_print_internal (os, matrix, pr_as_read_syntax,
+  octave_print_internal (os, m_matrix, pr_as_read_syntax,
                          current_print_indent_level (), true);
 }
 
 void
 octave_char_matrix_str::short_disp (std::ostream& os) const
 {
-  if (matrix.ndims () == 2 && numel () > 0)
+  if (m_matrix.ndims () == 2 && numel () > 0)
     {
-      charMatrix chm (matrix);
+      charMatrix chm (m_matrix);
       std::string tmp = chm.row_as_string (0);
 
       // FIXME: should this be configurable?
@@ -312,7 +312,7 @@
     }
 
   std::string tname = type_name ();
-  dim_vector dv = matrix.dims ();
+  dim_vector dv = m_matrix.dims ();
   std::string dimstr = dv.str ();
   return "[" + dimstr + " " + tname + "]";
 }
@@ -388,7 +388,7 @@
       charNDArray tmp(dv);
 
       if (tmp.isempty ())
-        matrix = tmp;
+        m_matrix = tmp;
       else
         {
           char *ftmp = tmp.fortran_vec ();
@@ -398,7 +398,7 @@
           if (! is.read (ftmp, dv.numel ()) || ! is)
             error ("load: failed to load string constant");
 
-          matrix = tmp;
+          m_matrix = tmp;
         }
     }
   else if (kw == "elements")
@@ -437,7 +437,7 @@
           chm.insert (tmp, i, 0);
         }
 
-      matrix = chm;
+      m_matrix = chm;
     }
   else if (kw == "length")
     {
@@ -459,7 +459,7 @@
           if (! is)
             error ("load: failed to load string constant");
 
-          matrix = tmp;
+          m_matrix = tmp;
         }
     }
   else
@@ -535,7 +535,7 @@
       if (! is)
         return false;
 
-      matrix = m;
+      m_matrix = m;
     }
   else
     {
@@ -559,7 +559,7 @@
             }
           chm.insert (btmp, i, 0);
         }
-      matrix = chm;
+      m_matrix = chm;
     }
   return true;
 }
@@ -593,7 +593,8 @@
     return false;
 #if defined (HAVE_HDF5_18)
   data_hid = H5Dcreate (loc_id, name, H5T_NATIVE_CHAR, space_hid,
-                        octave_H5P_DEFAULT, octave_H5P_DEFAULT, octave_H5P_DEFAULT);
+                        octave_H5P_DEFAULT, octave_H5P_DEFAULT,
+                        octave_H5P_DEFAULT);
 #else
   data_hid = H5Dcreate (loc_id, name, H5T_NATIVE_CHAR, space_hid,
                         octave_H5P_DEFAULT);
@@ -635,7 +636,7 @@
   dim_vector dv;
   int empty = load_hdf5_empty (loc_id, name, dv);
   if (empty > 0)
-    matrix.resize (dv);
+    m_matrix.resize (dv);
   if (empty)
     return (empty > 0);
 
@@ -684,7 +685,7 @@
                    octave_H5P_DEFAULT, str) >= 0)
         {
           retval = true;
-          matrix = m;
+          m_matrix = m;
         }
 
       H5Tclose (type_hid);
@@ -722,7 +723,7 @@
                   return false;
                 }
 
-              matrix = charMatrix (s);
+              m_matrix = charMatrix (s);
 
               H5Tclose (st_id);
               H5Tclose (type_hid);
@@ -773,7 +774,7 @@
                   chm.insert (s + i*(slen+1), i, 0);
                 }
 
-              matrix = chm;
+              m_matrix = chm;
 
               H5Tclose (st_id);
               H5Tclose (type_hid);
--- a/libinterp/octave-value/ov-str-mat.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-str-mat.h	Mon Aug 29 13:58:00 2022 +0200
@@ -98,13 +98,13 @@
   { return do_index_op_internal (idx, resize_ok); }
 
   octave_value squeeze (void) const
-  { return octave_value (charNDArray (matrix.squeeze ())); }
+  { return octave_value (charNDArray (m_matrix.squeeze ())); }
 
   octave_value reshape (const dim_vector& new_dims) const
-  { return octave_value (charNDArray (matrix.reshape (new_dims))); }
+  { return octave_value (charNDArray (m_matrix.reshape (new_dims))); }
 
   octave_value permute (const Array<int>& vec, bool inv = false) const
-  { return octave_value (charNDArray (matrix.permute (vec, inv))); }
+  { return octave_value (charNDArray (m_matrix.permute (vec, inv))); }
 
   octave_value resize (const dim_vector& dv, bool fill = false) const;
 
@@ -114,7 +114,7 @@
   using octave_char_matrix::diag;
 
   octave_value diag (octave_idx_type k = 0) const
-  { return octave_value (matrix.diag (k)); }
+  { return octave_value (m_matrix.diag (k)); }
 
   bool is_string (void) const { return true; }
 
@@ -141,11 +141,11 @@
   Array<std::string> cellstr_value (void) const;
 
   octave_value sort (octave_idx_type dim = 0, sortmode mode = ASCENDING) const
-  { return octave_value (matrix.sort (dim, mode)); }
+  { return octave_value (m_matrix.sort (dim, mode)); }
 
   octave_value sort (Array<octave_idx_type>& sidx, octave_idx_type dim = 0,
                      sortmode mode = ASCENDING) const
-  { return octave_value (matrix.sort (sidx, dim, mode)); }
+  { return octave_value (m_matrix.sort (sidx, dim, mode)); }
 
   bool print_as_scalar (void) const { return (rows () <= 1); }
 
@@ -172,7 +172,7 @@
   int write (octave::stream& os, int block_size,
              oct_data_conv::data_type output_type, int skip,
              octave::mach_info::float_format flt_fmt) const
-  { return os.write (matrix, block_size, output_type, skip, flt_fmt); }
+  { return os.write (m_matrix, block_size, output_type, skip, flt_fmt); }
 
 protected:
 
@@ -229,17 +229,17 @@
   { return new octave_char_matrix_sq_str (); }
 
   octave_value squeeze (void) const
-  { return octave_value (charNDArray (matrix.squeeze ()), '\''); }
+  { return octave_value (charNDArray (m_matrix.squeeze ()), '\''); }
 
   octave_value reshape (const dim_vector& new_dims) const
-  { return octave_value (charNDArray (matrix.reshape (new_dims)), '\''); }
+  { return octave_value (charNDArray (m_matrix.reshape (new_dims)), '\''); }
 
   octave_value permute (const Array<int>& vec, bool inv = false) const
-  { return octave_value (charNDArray (matrix.permute (vec, inv)), '\''); }
+  { return octave_value (charNDArray (m_matrix.permute (vec, inv)), '\''); }
 
   octave_value resize (const dim_vector& dv, bool = false) const
   {
-    charNDArray retval (matrix);
+    charNDArray retval (m_matrix);
     retval.resize (dv);
     return octave_value (retval, '\'');
   }
@@ -250,7 +250,7 @@
   using octave_char_matrix_str::diag;
 
   octave_value diag (octave_idx_type k = 0) const
-  { return octave_value (matrix.diag (k), '\''); }
+  { return octave_value (m_matrix.diag (k), '\''); }
 
   bool is_sq_string (void) const { return true; }
 
@@ -259,11 +259,11 @@
   { return do_index_op_internal (idx, resize_ok, '\''); }
 
   octave_value sort (octave_idx_type dim = 0, sortmode mode = ASCENDING) const
-  { return octave_value (matrix.sort (dim, mode), '\''); }
+  { return octave_value (m_matrix.sort (dim, mode), '\''); }
 
   octave_value sort (Array<octave_idx_type>& sidx, octave_idx_type dim = 0,
                      sortmode mode = ASCENDING) const
-  { return octave_value (matrix.sort (sidx, dim, mode), '\''); }
+  { return octave_value (m_matrix.sort (sidx, dim, mode), '\''); }
 
 private:
 
--- a/libinterp/octave-value/ov-struct.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-struct.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -91,7 +91,7 @@
 {
   Cell retval;
 
-  assert (idx.length () == 1);
+  panic_if (idx.length () != 1);
 
   std::string nm = idx(0).string_value ();
 
@@ -321,7 +321,7 @@
 
                 octave_value_list key_idx = *++p;
 
-                assert (key_idx.length () == 1);
+                panic_if (key_idx.length () != 1);
 
                 std::string key = key_idx(0).string_value ();
 
@@ -377,7 +377,7 @@
           {
             octave_value_list key_idx = idx.front ();
 
-            assert (key_idx.length () == 1);
+            panic_if (key_idx.length () != 1);
 
             std::string key = key_idx(0).string_value ();
 
@@ -443,7 +443,7 @@
             octave_value_list key_idx = *++p;
             octave_value_list idxf = idx.front ();
 
-            assert (key_idx.length () == 1);
+            panic_if (key_idx.length () != 1);
 
             std::string key = key_idx(0).string_value ();
 
@@ -514,7 +514,7 @@
       {
         octave_value_list key_idx = idx.front ();
 
-        assert (key_idx.length () == 1);
+        panic_if (key_idx.length () != 1);
 
         std::string key = key_idx(0).string_value ();
 
@@ -1107,7 +1107,7 @@
 {
   octave_value retval;
 
-  assert (idx.length () == 1);
+  panic_if (idx.length () != 1);
 
   std::string nm = idx(0).string_value ();
 
@@ -1228,7 +1228,7 @@
 
       octave_value_list key_idx = idx.front ();
 
-      assert (key_idx.length () == 1);
+      panic_if (key_idx.length () != 1);
 
       std::string key = key_idx(0).string_value ();
 
@@ -1885,14 +1885,16 @@
 %!assert (size (x), [0,0])
 %!assert (isstruct (x))
 %!assert (isempty (fieldnames (x)))
-%!fail ('struct ("a",{1,2},"b",{1,2,3})', 'dimensions of parameter 2 do not match those of parameter 4')
+%!fail ('struct ("a",{1,2},"b",{1,2,3})',
+%!      'dimensions of parameter 2 do not match those of parameter 4')
 %!error <arguments must occur as "field", VALUE pairs> struct (1,2,3,4)
-%!fail ('struct ("1",2,"3")', 'struct: additional arguments must occur as "field", VALUE pairs')
+%!fail ('struct ("1",2,"3")',
+%!      'struct: additional arguments must occur as "field", VALUE pairs')
 */
 
 DEFUN (isstruct, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} isstruct (@var{x})
+@deftypefn {} {@var{tf} =} isstruct (@var{x})
 Return true if @var{x} is a structure or a structure array.
 @seealso{ismatrix, iscell, isa}
 @end deftypefn */)
@@ -1905,8 +1907,8 @@
 
 DEFUN (__fieldnames__, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} __fieldnames__ (@var{struct})
-@deftypefnx {} {} __fieldnames__ (@var{obj})
+@deftypefn  {} {@var{names} =} __fieldnames__ (@var{struct})
+@deftypefnx {} {@var{names} =} __fieldnames__ (@var{obj})
 Internal function.
 
 Implements @code{fieldnames()} for structures and Octave objects.
@@ -1932,8 +1934,8 @@
 
 DEFUN (isfield, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} isfield (@var{x}, "@var{name}")
-@deftypefnx {} {} isfield (@var{x}, @var{name})
+@deftypefn  {} {@var{tf} =} isfield (@var{x}, "@var{name}")
+@deftypefnx {} {@var{tf} =} isfield (@var{x}, @var{name})
 Return true if the @var{x} is a structure and it includes an element named
 @var{name}.
 
@@ -1986,7 +1988,7 @@
 
 DEFUN (numfields, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} numfields (@var{s})
+@deftypefn {} {@var{n} =} numfields (@var{s})
 Return the number of fields of the structure @var{s}.
 @seealso{fieldnames}
 @end deftypefn */)
@@ -2054,8 +2056,8 @@
 
 DEFUN (cell2struct, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn  {} {} cell2struct (@var{cell}, @var{fields})
-@deftypefnx {} {} cell2struct (@var{cell}, @var{fields}, @var{dim})
+@deftypefn  {} {@var{S} =} cell2struct (@var{cell}, @var{fields})
+@deftypefnx {} {@var{S} =} cell2struct (@var{cell}, @var{fields}, @var{dim})
 Convert @var{cell} to a structure.
 
 The number of fields in @var{fields} must match the number of elements in
@@ -2065,10 +2067,10 @@
 
 @example
 @group
-A = cell2struct (@{"Peter", "Hannah", "Robert";
+S = cell2struct (@{"Peter", "Hannah", "Robert";
                    185, 170, 168@},
                  @{"Name","Height"@}, 1);
-A(1)
+S(1)
    @result{}
       @{
         Name   = Peter
@@ -2112,7 +2114,7 @@
   // result dimensions.
   dim_vector rdv = vals.dims ().redim (nd);
 
-  assert (ext == rdv(dim));
+  panic_unless (ext == rdv(dim));
   if (nd == 2)
     {
       rdv(0) = rdv(1-dim);
@@ -2213,7 +2215,7 @@
        doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} struct_levels_to_print ()
 @deftypefnx {} {@var{old_val} =} struct_levels_to_print (@var{new_val})
-@deftypefnx {} {} struct_levels_to_print (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} struct_levels_to_print (@var{new_val}, "local")
 Query or set the internal variable that specifies the number of
 structure levels to display.
 
@@ -2232,7 +2234,7 @@
        doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} print_struct_array_contents ()
 @deftypefnx {} {@var{old_val} =} print_struct_array_contents (@var{new_val})
-@deftypefnx {} {} print_struct_array_contents (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} print_struct_array_contents (@var{new_val}, "local")
 Query or set the internal variable that specifies whether to print struct
 array contents.
 
--- a/libinterp/octave-value/ov-typeinfo.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-typeinfo.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -645,7 +645,8 @@
   {
     octave_scalar_map retval;
 
-    int len = std::min (static_cast<int> (m_binary_ops.columns ()), m_num_types);
+    int len = std::min (static_cast<int> (m_binary_ops.columns ()),
+                        m_num_types);
 
     dim_vector tab_dims (len, len);
 
@@ -697,7 +698,8 @@
   {
     octave_scalar_map retval;
 
-    int len = std::min (static_cast<int> (m_assign_ops.columns ()), m_num_types);
+    int len = std::min (static_cast<int> (m_assign_ops.columns ()),
+                        m_num_types);
 
     dim_vector tab_dims (len, len);
 
@@ -722,7 +724,8 @@
   {
     octave_scalar_map retval;
 
-    int len = std::min (static_cast<int> (m_assignany_ops.columns ()), m_num_types);
+    int len = std::min (static_cast<int> (m_assignany_ops.columns ()),
+                        m_num_types);
 
     dim_vector tab_dims (1, len);
 
@@ -767,32 +770,28 @@
   int register_type (const std::string& t_name, const std::string& c_name,
                      const octave_value& val)
   {
-    octave::type_info& type_info
-      = octave::__get_type_info__ ("register_type");
+    octave::type_info& type_info = octave::__get_type_info__ ();
 
     return type_info.register_type (t_name, c_name, val);
   }
 
   octave_value lookup_type (const std::string& nm)
   {
-    octave::type_info& type_info
-      = octave::__get_type_info__ ("lookup_type");
+    octave::type_info& type_info = octave::__get_type_info__ ();
 
     return type_info.lookup_type (nm);
   }
 
   unary_class_op_fcn lookup_unary_class_op (octave_value::unary_op op)
   {
-    octave::type_info& type_info
-      = octave::__get_type_info__ ("lookup_unary_class_op");
+    octave::type_info& type_info = octave::__get_type_info__ ();
 
     return type_info.lookup_unary_class_op (op);
   }
 
   unary_op_fcn lookup_unary_op (octave_value::unary_op op, int t)
   {
-    octave::type_info& type_info
-      = octave::__get_type_info__ ("lookup_unary_op");
+    octave::type_info& type_info = octave::__get_type_info__ ();
 
     return type_info.lookup_unary_op (op, t);
   }
@@ -800,8 +799,7 @@
   non_const_unary_op_fcn
   lookup_non_const_unary_op (octave_value::unary_op op, int t)
   {
-    octave::type_info& type_info
-      = octave::__get_type_info__ ("lookup_non_const_unary_op");
+    octave::type_info& type_info = octave::__get_type_info__ ();
 
     return type_info.lookup_non_const_unary_op (op, t);
   }
@@ -809,8 +807,7 @@
   binary_class_op_fcn
   lookup_binary_class_op (octave_value::binary_op op)
   {
-    octave::type_info& type_info
-      = octave::__get_type_info__ ("lookup_binary_class_op");
+    octave::type_info& type_info = octave::__get_type_info__ ();
 
     return type_info.lookup_binary_class_op (op);
   }
@@ -818,8 +815,7 @@
   binary_op_fcn
   lookup_binary_op (octave_value::binary_op op, int t1, int t2)
   {
-    octave::type_info& type_info
-      = octave::__get_type_info__ ("lookup_binary_op");
+    octave::type_info& type_info = octave::__get_type_info__ ();
 
     return type_info.lookup_binary_op (op, t1, t2);
   }
@@ -827,8 +823,7 @@
   binary_class_op_fcn
   lookup_binary_class_op (octave_value::compound_binary_op op)
   {
-    octave::type_info& type_info
-      = octave::__get_type_info__ ("lookup_binary_class_op");
+    octave::type_info& type_info = octave::__get_type_info__ ();
 
     return type_info.lookup_binary_class_op (op);
   }
@@ -836,16 +831,14 @@
   binary_op_fcn
   lookup_binary_op (octave_value::compound_binary_op op, int t1, int t2)
   {
-    octave::type_info& type_info
-      = octave::__get_type_info__ ("lookup_binary_op");
+    octave::type_info& type_info = octave::__get_type_info__ ();
 
     return type_info.lookup_binary_op (op, t1, t2);
   }
 
   cat_op_fcn lookup_cat_op (int t1, int t2)
   {
-    octave::type_info& type_info
-      = octave::__get_type_info__ ("lookup_cat_op");
+    octave::type_info& type_info = octave::__get_type_info__ ();
 
     return type_info.lookup_cat_op (t1, t2);
   }
@@ -853,8 +846,7 @@
   assign_op_fcn
   lookup_assign_op (octave_value::assign_op op, int t_lhs, int t_rhs)
   {
-    octave::type_info& type_info
-      = octave::__get_type_info__ ("lookup_assign_op");
+    octave::type_info& type_info = octave::__get_type_info__ ();
 
     return type_info.lookup_assign_op (op, t_lhs, t_rhs);
   }
@@ -862,16 +854,14 @@
   assignany_op_fcn
   lookup_assignany_op (octave_value::assign_op op, int t_lhs)
   {
-    octave::type_info& type_info
-      = octave::__get_type_info__ ("lookup_assignany_op");
+    octave::type_info& type_info = octave::__get_type_info__ ();
 
     return type_info.lookup_assignany_op (op, t_lhs);
   }
 
   int lookup_pref_assign_conv (int t_lhs, int t_rhs)
   {
-    octave::type_info& type_info
-      = octave::__get_type_info__ ("lookup_pref_assign_conv");
+    octave::type_info& type_info = octave::__get_type_info__ ();
 
     return type_info.lookup_pref_assign_conv (t_lhs, t_rhs);
   }
@@ -879,24 +869,21 @@
   octave_base_value::type_conv_fcn
   lookup_widening_op (int t, int t_result)
   {
-    octave::type_info& type_info
-      = octave::__get_type_info__ ("lookup_widening_op");
+    octave::type_info& type_info = octave::__get_type_info__ ();
 
     return type_info.lookup_widening_op (t, t_result);
   }
 
   string_vector installed_type_names (void)
   {
-    octave::type_info& type_info
-      = octave::__get_type_info__ ("installed_type_names");
+    octave::type_info& type_info = octave::__get_type_info__ ();
 
     return type_info.installed_type_names ();
   }
 
   octave_scalar_map installed_type_info (void)
   {
-    octave::type_info& type_info
-      = octave::__get_type_info__ ("installed_type_info");
+    octave::type_info& type_info = octave::__get_type_info__ ();
 
     return type_info.installed_type_info ();
   }
@@ -906,8 +893,8 @@
 
 DEFMETHOD (typeinfo, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn  {} {} typeinfo ()
-@deftypefnx {} {} typeinfo (@var{expr})
+@deftypefn  {} {@var{typestr} =} typeinfo (@var{expr})
+@deftypefnx {} {@var{cstr} =} typeinfo ()
 
 Return the type of the expression @var{expr}, as a string.
 
--- a/libinterp/octave-value/ov-uint16.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-uint16.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -57,8 +57,8 @@
 #include "ls-utils.h"
 #include "ls-hdf5.h"
 
-octave_hdf5_id octave_uint16_matrix::hdf5_save_type = HDF5_SAVE_TYPE;
-octave_hdf5_id octave_uint16_scalar::hdf5_save_type = HDF5_SAVE_TYPE;
+octave_hdf5_id octave_uint16_matrix::s_hdf5_save_type = HDF5_SAVE_TYPE;
+octave_hdf5_id octave_uint16_scalar::s_hdf5_save_type = HDF5_SAVE_TYPE;
 
 // Prevent implicit instantiations on some systems (Windows, others?)
 // that can lead to duplicate definitions of static data members.
--- a/libinterp/octave-value/ov-uint32.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-uint32.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -56,8 +56,8 @@
 #include "ls-utils.h"
 #include "ls-hdf5.h"
 
-octave_hdf5_id octave_uint32_matrix::hdf5_save_type = HDF5_SAVE_TYPE;
-octave_hdf5_id octave_uint32_scalar::hdf5_save_type = HDF5_SAVE_TYPE;
+octave_hdf5_id octave_uint32_matrix::s_hdf5_save_type = HDF5_SAVE_TYPE;
+octave_hdf5_id octave_uint32_scalar::s_hdf5_save_type = HDF5_SAVE_TYPE;
 
 // Prevent implicit instantiations on some systems (Windows, others?)
 // that can lead to duplicate definitions of static data members.
--- a/libinterp/octave-value/ov-uint64.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-uint64.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -56,8 +56,8 @@
 #include "ls-utils.h"
 #include "ls-hdf5.h"
 
-octave_hdf5_id octave_uint64_matrix::hdf5_save_type = HDF5_SAVE_TYPE;
-octave_hdf5_id octave_uint64_scalar::hdf5_save_type = HDF5_SAVE_TYPE;
+octave_hdf5_id octave_uint64_matrix::s_hdf5_save_type = HDF5_SAVE_TYPE;
+octave_hdf5_id octave_uint64_scalar::s_hdf5_save_type = HDF5_SAVE_TYPE;
 
 // Prevent implicit instantiations on some systems (Windows, others?)
 // that can lead to duplicate definitions of static data members.
--- a/libinterp/octave-value/ov-uint8.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-uint8.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -56,8 +56,8 @@
 #include "ls-utils.h"
 #include "ls-hdf5.h"
 
-octave_hdf5_id octave_uint8_matrix::hdf5_save_type = HDF5_SAVE_TYPE;
-octave_hdf5_id octave_uint8_scalar::hdf5_save_type = HDF5_SAVE_TYPE;
+octave_hdf5_id octave_uint8_matrix::s_hdf5_save_type = HDF5_SAVE_TYPE;
+octave_hdf5_id octave_uint8_scalar::s_hdf5_save_type = HDF5_SAVE_TYPE;
 
 // Prevent implicit instantiations on some systems (Windows, others?)
 // that can lead to duplicate definitions of static data members.
--- a/libinterp/octave-value/ov-usr-fcn.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-usr-fcn.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -75,8 +75,7 @@
   // FIXME: shouldn't this happen automatically when deleting cmd_list?
   if (m_cmd_list)
     {
-      octave::event_manager& evmgr
-        = octave::__get_event_manager__ ("octave_user_code::~octave_user_code");
+      octave::event_manager& evmgr = octave::__get_event_manager__ ();
 
       m_cmd_list->remove_all_breakpoints (evmgr, m_file_name);
     }
@@ -410,35 +409,35 @@
   return m_scope.subfunctions ();
 }
 
-// Find definition of final subfunction in list of subfuns:
+// Find definition of final subfunction in list of subfcns:
 //
 //  sub1>sub2>...>subN
 
 octave_value
-octave_user_function::find_subfunction (const std::string& subfuns_arg) const
+octave_user_function::find_subfunction (const std::string& subfcns_arg) const
 {
-  std::string subfuns = subfuns_arg;
+  std::string subfcns = subfcns_arg;
 
-  std::string first_fun = subfuns;
+  std::string first_fcn = subfcns;
 
-  std::size_t pos = subfuns.find ('>');
+  std::size_t pos = subfcns.find ('>');
 
   if (pos == std::string::npos)
-    subfuns = "";
+    subfcns = "";
   else
     {
-      first_fun = subfuns.substr (0, pos-1);
-      subfuns = subfuns.substr (pos+1);
+      first_fcn = subfcns.substr (0, pos-1);
+      subfcns = subfcns.substr (pos+1);
     }
 
-  octave_value ov_fcn = m_scope.find_subfunction (first_fun);
+  octave_value ov_fcn = m_scope.find_subfunction (first_fcn);
 
-  if (subfuns.empty ())
+  if (subfcns.empty ())
     return ov_fcn;
 
   octave_user_function *fcn = ov_fcn.user_function_value ();
 
-  return fcn->find_subfunction (subfuns);
+  return fcn->find_subfunction (subfcns);
 }
 
 bool
@@ -504,8 +503,8 @@
 octave::tree_expression *
 octave_user_function::special_expr (void)
 {
-  assert (is_special_expr ());
-  assert (m_cmd_list->length () == 1);
+  panic_unless (is_special_expr ());
+  panic_if (m_cmd_list->length () != 1);
 
   octave::tree_statement *stmt = m_cmd_list->front ();
   return stmt->expression ();
@@ -622,8 +621,7 @@
 void
 octave_user_function::restore_warning_states (void)
 {
-  octave::interpreter& interp
-    = octave::__get_interpreter__ ("octave_user_function::restore_warning_states");
+  octave::interpreter& interp = octave::__get_interpreter__ ();
 
   octave::tree_evaluator& tw = interp.get_evaluator ();
 
@@ -652,8 +650,8 @@
 
 DEFMETHOD (nargin, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn  {} {} nargin ()
-@deftypefnx {} {} nargin (@var{fcn})
+@deftypefn  {} {@var{n} =} nargin ()
+@deftypefnx {} {@var{n} =} nargin (@var{fcn})
 Report the number of input arguments to a function.
 
 Called from within a function, return the number of arguments passed to the
@@ -692,25 +690,25 @@
 
   if (nargin == 1)
     {
-      octave_value func = args(0);
+      octave_value fcn = args(0);
 
-      if (func.is_string ())
+      if (fcn.is_string ())
         {
           symbol_table& symtab = interp.get_symbol_table ();
 
-          std::string name = func.string_value ();
-          func = symtab.find_function (name);
-          if (func.is_undefined ())
+          std::string name = fcn.string_value ();
+          fcn = symtab.find_function (name);
+          if (fcn.is_undefined ())
             error ("nargin: invalid function name: %s", name.c_str ());
         }
 
-      octave_function *fcn_val = func.function_value (true);
+      octave_function *fcn_val = fcn.function_value (true);
       if (! fcn_val)
         error ("nargin: FCN must be a string or function handle");
 
-      octave_user_function *fcn = fcn_val->user_function_value (true);
+      octave_user_function *ufcn = fcn_val->user_function_value (true);
 
-      if (! fcn)
+      if (! ufcn)
         {
           // Matlab gives up for histc, so maybe it's ok that we
           // give up sometimes too?
@@ -720,10 +718,10 @@
                  type.c_str ());
         }
 
-      tree_parameter_list *m_param_list = fcn->parameter_list ();
+      tree_parameter_list *m_param_list = ufcn->parameter_list ();
 
       retval = (m_param_list ? m_param_list->length () : 0);
-      if (fcn->takes_varargs ())
+      if (ufcn->takes_varargs ())
         retval = -1 - retval;
     }
   else
@@ -741,8 +739,8 @@
 
 DEFMETHOD (nargout, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn  {} {} nargout ()
-@deftypefnx {} {} nargout (@var{fcn})
+@deftypefn  {} {@var{n} =} nargout ()
+@deftypefnx {} {@var{n} =} nargout (@var{fcn})
 Report the number of output arguments from a function.
 
 Called from within a function, return the number of values the caller
@@ -803,36 +801,36 @@
 
   if (nargin == 1)
     {
-      octave_value func = args(0);
+      octave_value fcn = args(0);
 
-      if (func.is_string ())
+      if (fcn.is_string ())
         {
           symbol_table& symtab = interp.get_symbol_table ();
 
-          std::string name = func.string_value ();
-          func = symtab.find_function (name);
-          if (func.is_undefined ())
+          std::string name = fcn.string_value ();
+          fcn = symtab.find_function (name);
+          if (fcn.is_undefined ())
             error ("nargout: invalid function name: %s", name.c_str ());
         }
 
-      if (func.is_inline_function ())
+      if (fcn.is_inline_function ())
         return ovl (1);
 
-      if (func.is_function_handle ())
+      if (fcn.is_function_handle ())
         {
-          octave_fcn_handle *fh = func.fcn_handle_value ();
+          octave_fcn_handle *fh = fcn.fcn_handle_value ();
 
           if (fh->is_anonymous ())
             return ovl (-1);
         }
 
-      octave_function *fcn_val = func.function_value (true);
+      octave_function *fcn_val = fcn.function_value (true);
       if (! fcn_val)
         error ("nargout: FCN must be a string or function handle");
 
-      octave_user_function *fcn = fcn_val->user_function_value (true);
+      octave_user_function *ufcn = fcn_val->user_function_value (true);
 
-      if (! fcn)
+      if (! ufcn)
         {
           // Matlab gives up for histc, so maybe it's ok that we
           // give up sometimes too?
@@ -842,11 +840,11 @@
                  type.c_str ());
         }
 
-      tree_parameter_list *m_ret_list = fcn->return_list ();
+      tree_parameter_list *m_ret_list = ufcn->return_list ();
 
       retval = (m_ret_list ? m_ret_list->length () : 0);
 
-      if (fcn->takes_var_return ())
+      if (ufcn->takes_var_return ())
         retval = -1 - retval;
     }
   else
@@ -869,7 +867,7 @@
        doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} optimize_subsasgn_calls ()
 @deftypefnx {} {@var{old_val} =} optimize_subsasgn_calls (@var{new_val})
-@deftypefnx {} {} optimize_subsasgn_calls (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} optimize_subsasgn_calls (@var{new_val}, "local")
 Query or set the internal flag for @code{subsasgn} method call
 optimizations.
 
@@ -905,7 +903,7 @@
 
 DEFMETHOD (isargout, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} isargout (@var{k})
+@deftypefn {} {@var{tf} =} isargout (@var{k})
 Within a function, return a logical value indicating whether the argument
 @var{k} will be assigned to a variable on output.
 
--- a/libinterp/octave-value/ov-usr-fcn.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov-usr-fcn.h	Mon Aug 29 13:58:00 2022 +0200
@@ -216,9 +216,9 @@
 
   // No copying!
 
-  octave_user_function (const octave_user_function& fn) = delete;
+  octave_user_function (const octave_user_function& fcn) = delete;
 
-  octave_user_function& operator = (const octave_user_function& fn) = delete;
+  octave_user_function& operator = (const octave_user_function& fcn) = delete;
 
   ~octave_user_function (void);
 
--- a/libinterp/octave-value/ov.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -1306,7 +1306,7 @@
 
 DEFUN (double, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} double (@var{x})
+@deftypefn {} {@var{y} =} double (@var{x})
 Convert @var{x} to double precision type.
 @seealso{single}
 @end deftypefn */)
@@ -1350,7 +1350,7 @@
 
 DEFUN (single, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} single (@var{x})
+@deftypefn {} {@var{y} =} single (@var{x})
 Convert @var{x} to single precision type.
 @seealso{double}
 @end deftypefn */)
@@ -1391,7 +1391,7 @@
 
 DEFUN (int8, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} int8 (@var{x})
+@deftypefn {} {@var{y} =} int8 (@var{x})
 Convert @var{x} to 8-bit integer type.
 @seealso{uint8, int16, uint16, int32, uint32, int64, uint64}
 @end deftypefn */)
@@ -1413,7 +1413,7 @@
 
 DEFUN (int16, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} int16 (@var{x})
+@deftypefn {} {@var{y} =} int16 (@var{x})
 Convert @var{x} to 16-bit integer type.
 @seealso{int8, uint8, uint16, int32, uint32, int64, uint64}
 @end deftypefn */)
@@ -1435,7 +1435,7 @@
 
 DEFUN (int32, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} int32 (@var{x})
+@deftypefn {} {@var{y} =} int32 (@var{x})
 Convert @var{x} to 32-bit integer type.
 @seealso{int8, uint8, int16, uint16, uint32, int64, uint64}
 @end deftypefn */)
@@ -1457,7 +1457,7 @@
 
 DEFUN (int64, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} int64 (@var{x})
+@deftypefn {} {@var{y} =} int64 (@var{x})
 Convert @var{x} to 64-bit integer type.
 @seealso{int8, uint8, int16, uint16, int32, uint32, uint64}
 @end deftypefn */)
@@ -1479,7 +1479,7 @@
 
 DEFUN (uint8, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} uint8 (@var{x})
+@deftypefn {} {@var{y} =} uint8 (@var{x})
 Convert @var{x} to unsigned 8-bit integer type.
 @seealso{int8, int16, uint16, int32, uint32, int64, uint64}
 @end deftypefn */)
@@ -1501,7 +1501,7 @@
 
 DEFUN (uint16, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} uint16 (@var{x})
+@deftypefn {} {@var{y} =} uint16 (@var{x})
 Convert @var{x} to unsigned 16-bit integer type.
 @seealso{int8, uint8, int16, int32, uint32, int64, uint64}
 @end deftypefn */)
@@ -1523,7 +1523,7 @@
 
 DEFUN (uint32, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} uint32 (@var{x})
+@deftypefn {} {@var{y} =} uint32 (@var{x})
 Convert @var{x} to unsigned 32-bit integer type.
 @seealso{int8, uint8, int16, uint16, int32, int64, uint64}
 @end deftypefn */)
@@ -1545,7 +1545,7 @@
 
 DEFUN (uint64, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} uint64 (@var{x})
+@deftypefn {} {@var{y} =} uint64 (@var{x})
 Convert @var{x} to unsigned 64-bit integer type.
 @seealso{int8, uint8, int16, uint16, int32, uint32, int64}
 @end deftypefn */)
@@ -1691,8 +1691,7 @@
           int tthis = this->type_id ();
           int trhs = rhs.type_id ();
 
-          octave::type_info& ti
-            = octave::__get_type_info__ ("octave_value::assign");
+          octave::type_info& ti = octave::__get_type_info__ ();
 
           f = ti.lookup_assign_op (op, tthis, trhs);
         }
@@ -2495,7 +2494,7 @@
       // Genuine.
       int t = type_id ();
 
-      octave::type_info& ti = octave::__get_type_info__ ("non_const_unary_op");
+      octave::type_info& ti = octave::__get_type_info__ ();
 
       octave::type_info::non_const_unary_op_fcn f
         = ti.lookup_non_const_unary_op (op, t);
@@ -2558,8 +2557,7 @@
       // Only attempt to operate in-place if this variable is unshared.
       if (m_rep->count == 1)
         {
-          octave::type_info& ti
-            = octave::__get_type_info__ ("non_const_unary_op");
+          octave::type_info& ti = octave::__get_type_info__ ();
 
           f = ti.lookup_non_const_unary_op (op, t);
         }
@@ -2843,7 +2841,7 @@
   binary_op (octave_value::binary_op op, const octave_value& v1,
              const octave_value& v2)
   {
-    type_info& ti = __get_type_info__ ("binary_op");
+    type_info& ti = __get_type_info__ ();
 
     return binary_op (ti, op, v1, v2);
   }
@@ -2937,7 +2935,7 @@
   binary_op (octave_value::compound_binary_op op,
              const octave_value& v1, const octave_value& v2)
   {
-    type_info& ti = __get_type_info__ ("binary_op");
+    type_info& ti = __get_type_info__ ();
 
     return binary_op (ti, op, v1, v2);
   }
@@ -3024,7 +3022,7 @@
   cat_op (const octave_value& v1, const octave_value& v2,
           const Array<octave_idx_type>& ra_idx)
   {
-    type_info& ti = __get_type_info__ ("cat_op");
+    type_info& ti = __get_type_info__ ();
 
     return cat_op (ti, v1, v2, ra_idx);
   }
@@ -3489,7 +3487,7 @@
             tmp1(0) = base;
           }
 
-        interpreter& interp = __get_interpreter__ ("colon_op");
+        interpreter& interp = __get_interpreter__ ();
 
         symbol_table& symtab = interp.get_symbol_table ();
 
@@ -3630,7 +3628,7 @@
   octave_value
   unary_op (octave_value::unary_op op, const octave_value& v)
   {
-    type_info& ti = __get_type_info__ ("unary_op");
+    type_info& ti = __get_type_info__ ();
 
     return unary_op (ti, op, v);
   }
@@ -3724,7 +3722,7 @@
 
 DEFUN (sizeof, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} sizeof (@var{val})
+@deftypefn {} {@var{sz} =} sizeof (@var{val})
 Return the size of @var{val} in bytes.
 @seealso{whos}
 @end deftypefn */)
@@ -3802,7 +3800,7 @@
 
 DEFUN (subsref, args, nargout,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} subsref (@var{val}, @var{idx})
+@deftypefn {} {@var{newval} =} subsref (@var{val}, @var{idx})
 Perform the subscripted element selection operation on @var{val} according
 to the subscript specified by @var{idx}.
 
@@ -3854,7 +3852,7 @@
 
 DEFUN (subsasgn, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} subsasgn (@var{val}, @var{idx}, @var{rhs})
+@deftypefn {} {@var{newval} =} subsasgn (@var{val}, @var{idx}, @var{rhs})
 Perform the subscripted assignment operation according to the subscript
 specified by @var{idx}.
 
@@ -3986,7 +3984,7 @@
 
 DEFUN (is_sq_string, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} is_sq_string (@var{x})
+@deftypefn {} {@var{tf} =} is_sq_string (@var{x})
 Return true if @var{x} is a single-quoted character string.
 @seealso{is_dq_string, ischar}
 @end deftypefn */)
@@ -4009,7 +4007,7 @@
 
 DEFUN (is_dq_string, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} is_dq_string (@var{x})
+@deftypefn {} {@var{tf} =} is_dq_string (@var{x})
 Return true if @var{x} is a double-quoted character string.
 @seealso{is_sq_string, ischar}
 @end deftypefn */)
@@ -4034,7 +4032,7 @@
        doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} optimize_permutation_matrix ()
 @deftypefnx {} {@var{old_val} =} optimize_permutation_matrix (@var{new_val})
-@deftypefnx {} {} optimize_permutation_matrix (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} optimize_permutation_matrix (@var{new_val}, "local")
 Query or set whether a special space-efficient format is used for storing
 permutation matrices.
 
@@ -4065,7 +4063,7 @@
        doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} optimize_diagonal_matrix ()
 @deftypefnx {} {@var{old_val} =} optimize_diagonal_matrix (@var{new_val})
-@deftypefnx {} {} optimize_diagonal_matrix (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} optimize_diagonal_matrix (@var{new_val}, "local")
 Query or set whether a special space-efficient format is used for storing
 diagonal matrices.
 
@@ -4110,7 +4108,7 @@
        doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} optimize_range ()
 @deftypefnx {} {@var{old_val} =} optimize_range (@var{new_val})
-@deftypefnx {} {} optimize_range (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} optimize_range (@var{new_val}, "local")
 Query or set whether a special space-efficient format is used for storing
 ranges.
 
--- a/libinterp/octave-value/ov.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ov.h	Mon Aug 29 13:58:00 2022 +0200
@@ -1901,6 +1901,8 @@
 extern OCTINTERP_API void install_types (octave::type_info&);
 
 // Templated value extractors.
+// FIXME: would be more consistent to use panic_impossible(), rather than
+//        assert(), but including "error.h" leads to compilation errors.
 template <typename Value>
 inline Value octave_value_extract (const octave_value&)
 { assert (false); }
--- a/libinterp/octave-value/ovl.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave-value/ovl.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -71,7 +71,7 @@
             m_data[k++] = ovl(i);
         }
 
-      assert (k == nel);
+      panic_unless (k == nel);
     }
 
 }
--- a/libinterp/octave.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -242,7 +242,7 @@
     octave_scalar_map m;
 
     m.assign ("sys_argc", sys_argc ());
-    m.assign ("sys_argv", string_vector (sys_argv ()));
+    m.assign ("sys_argv", Cell (string_vector (sys_argv ())));
     m.assign ("echo_commands", echo_commands ());
     m.assign ("forced_interactive", forced_interactive ());
     m.assign ("forced_line_editing", forced_line_editing ());
@@ -267,8 +267,8 @@
     m.assign ("info_file", info_file ());
     m.assign ("info_program", info_program ());
     m.assign ("texi_macros_file", texi_macros_file ());
-    m.assign ("all_args", all_args ());
-    m.assign ("remaining_args", remaining_args ());
+    m.assign ("all_args", Cell (all_args ()));
+    m.assign ("remaining_args", Cell (remaining_args ()));
 
     return m;
   }
@@ -429,7 +429,7 @@
 
 DEFUN (isguirunning, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} isguirunning ()
+@deftypefn {} {@var{tf} =} isguirunning ()
 Return true if Octave is running in GUI mode and false otherwise.
 @seealso{have_window_system}
 @end deftypefn */)
@@ -450,7 +450,7 @@
 
 DEFUN (argv, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} argv ()
+@deftypefn {} {@var{args} =} argv ()
 Return the command line arguments passed to Octave.
 
 For example, if you invoked Octave using the command
@@ -481,9 +481,9 @@
 
 DEFUN (cmdline_options, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} argv ()
-Return a structure containing info about the command line arguments
-passed to Octave.
+@deftypefn {} {@var{opt_struct} =} cmdline_options ()
+Return a structure containing info about the command line arguments passed to
+Octave.
 @end deftypefn */)
 {
   if (args.length () != 0)
@@ -501,13 +501,13 @@
 
 DEFUN (program_invocation_name, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} program_invocation_name ()
+@deftypefn {} {@var{name} =} program_invocation_name ()
 Return the name that was typed at the shell prompt to run Octave.
 
-If executing a script from the command line (e.g., @code{octave foo.m})
-or using an executable Octave script, the program name is set to the
-name of the script.  @xref{Executable Octave Programs}, for an example of
-how to create an executable Octave script.
+If executing a script from the command line (e.g., @code{octave foo.m}) or
+using an executable Octave script, the program name is set to the name of the
+script.  @xref{Executable Octave Programs}, for an example of how to create an
+executable Octave script.
 @seealso{program_name}
 @end deftypefn */)
 {
@@ -524,7 +524,7 @@
 
 DEFUN (program_name, args, ,
        doc: /* -*- texinfo -*-
-@deftypefn {} {} program_name ()
+@deftypefn {} {@var{name} =} program_name ()
 Return the last component of the value returned by
 @code{program_invocation_name}.
 @seealso{program_invocation_name}
--- a/libinterp/octave.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/octave.h	Mon Aug 29 13:58:00 2022 +0200
@@ -57,11 +57,13 @@
 
     bool echo_commands (void) const { return m_echo_commands; }
 
-    bool experimental_terminal_widget (void) const { return m_experimental_terminal_widget; }
+    bool experimental_terminal_widget (void) const
+    { return m_experimental_terminal_widget; }
     bool forced_interactive (void) const { return m_forced_interactive; }
     bool forced_line_editing (void) const { return m_forced_line_editing; }
     bool gui (void) const { return m_gui; }
-    bool inhibit_startup_message (void) const { return m_inhibit_startup_message; }
+    bool inhibit_startup_message (void) const
+    { return m_inhibit_startup_message; }
     bool line_editing (void) const { return m_line_editing; }
 
     bool no_window_system (void) const { return m_no_window_system; }
@@ -74,7 +76,8 @@
     bool traditional (void) const { return m_traditional; }
     bool verbose_flag (void) const { return m_verbose_flag; }
     std::string code_to_eval (void) const { return m_code_to_eval; }
-    std::list<std::string> command_line_path (void) const { return m_command_line_path; }
+    std::list<std::string> command_line_path (void) const
+    { return m_command_line_path; }
     std::string docstrings_file (void) const { return m_docstrings_file; }
     std::string doc_cache_file (void) const { return m_doc_cache_file; }
     std::string exec_path (void) const { return m_exec_path; }
@@ -87,7 +90,8 @@
 
     void echo_commands (bool arg) { m_echo_commands = arg; }
 
-    void experimental_terminal_widget (bool arg) { m_experimental_terminal_widget = arg; }
+    void experimental_terminal_widget (bool arg)
+    { m_experimental_terminal_widget = arg; }
     void forced_line_editing (bool arg) { m_forced_line_editing = arg; }
     void forced_interactive (bool arg) { m_forced_interactive = arg; }
     void gui (bool arg) { m_gui = arg; }
@@ -104,7 +108,8 @@
     void traditional (bool arg) { m_traditional = arg; }
     void verbose_flag (bool arg) { m_verbose_flag = arg; }
     void code_to_eval (const std::string& arg) { m_code_to_eval = arg; }
-    void command_line_path (const std::list<std::string>& arg) { m_command_line_path = arg; }
+    void command_line_path (const std::list<std::string>& arg)
+    { m_command_line_path = arg; }
     void docstrings_file (const std::string& arg) { m_docstrings_file = arg; }
     void doc_cache_file (const std::string& arg) { m_doc_cache_file = arg; }
     void exec_path (const std::string& arg) { m_exec_path = arg; }
@@ -282,7 +287,8 @@
     virtual bool gui_running (void) const { return false; }
     virtual void gui_running (bool) { }
 
-    void program_invocation_name (const std::string& nm) { m_program_invocation_name = nm; }
+    void program_invocation_name (const std::string& nm)
+    { m_program_invocation_name = nm; }
 
     void program_name (const std::string& nm) { m_program_name = nm; }
 
--- a/libinterp/operators/op-class.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/operators/op-class.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -55,9 +55,9 @@
 {
   std::string class_name = a.class_name ();
 
-  octave_value meth
-    = octave::__get_symbol_table__ ("oct_unop_" + opname)
-      .find_method (opname, class_name);
+  octave::symbol_table& symtab = octave::__get_symbol_table__ ();
+
+  octave_value meth = symtab.find_method (opname, class_name);
 
   if (meth.is_defined ())
     {
@@ -140,8 +140,7 @@
 oct_binop_default (const octave_value& a1, const octave_value& a2,
                    const std::string& opname)
 {
-  octave::symbol_table& symtab
-    = octave::__get_symbol_table__ ("oct_binop_" + opname);
+  octave::symbol_table& symtab = octave::__get_symbol_table__ ();
 
   // Dispatch to first (leftmost) operand by default.
   std::string dispatch_type = a1.class_name ();
--- a/libinterp/operators/ops.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/operators/ops.h	Mon Aug 29 13:58:00 2022 +0200
@@ -29,6 +29,7 @@
 #include "octave-config.h"
 
 #include "Array-util.h"
+#include "error.h"
 
 namespace octave
 {
@@ -130,7 +131,7 @@
     CONCAT2 (octave_, t1)& v1 = dynamic_cast<CONCAT2 (octave_, t1)&> (a1); \
     const CONCAT2 (octave_, t2)& v2 = dynamic_cast<const CONCAT2 (octave_, t2)&> (a2); \
                                                                         \
-    assert (idx.empty ());                                              \
+    error_unless (idx.empty ());                                        \
     v1.matrix_ref () op v2.CONCAT2 (f, _value) ();                      \
                                                                         \
     return octave_value ();                                             \
@@ -145,7 +146,7 @@
     CONCAT2 (octave_, t1)& v1 = dynamic_cast<CONCAT2 (octave_, t1)&> (a1); \
     const CONCAT2 (octave_, t2)& v2 = dynamic_cast<const CONCAT2 (octave_, t2)&> (a2); \
                                                                         \
-    assert (idx.empty ());                                              \
+    error_unless (idx.empty ());                                        \
     fnop (v1.matrix_ref (), v2.CONCAT2 (f, _value) ());                 \
                                                                         \
     return octave_value ();                                             \
--- a/libinterp/parse-tree/bp-table.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/parse-tree/bp-table.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -176,7 +176,7 @@
       {
         Array<octave_value> W = U.index (0);
         if (W.isempty () || W(0).isempty ())
-          es.debug_on_caught (true);    // like "dbstop if caught error" with no ID
+          es.debug_on_caught (true);  // like "dbstop if caught error" with no ID
         else if (! W(0).iscell ())
           fail = true;
         else
@@ -338,13 +338,13 @@
 
   void bp_table::parse_dbfunction_params (const char *who,
                                           const octave_value_list& args,
-                                          std::string& func_name,
+                                          std::string& fcn_name,
                                           std::string& class_name,
                                           bp_table::bp_lines& lines,
                                           std::string& cond)
   {
     int nargin = args.length ();
-    func_name = "";
+    fcn_name = "";
     class_name = "";
     lines = bp_table::bp_lines ();
 
@@ -395,10 +395,10 @@
         switch (tok)
           {
           case dbstop_in:
-            func_name = args(pos).string_value ();
+            fcn_name = args(pos).string_value ();
             if (seen_in)
               error ("%s: Too many function names specified -- %s",
-                     who, func_name.c_str ());
+                     who, fcn_name.c_str ());
             else if (seen_at || seen_if)
               error ("%s: function name must come before line number and 'if'",
                      who);
@@ -426,9 +426,9 @@
                 if (atoi (arg.c_str ()) == 0)
                   {
                     // We have class and function names but already
-                    // stored the class name in func_name.
-                    class_name = func_name;
-                    func_name = arg;
+                    // stored the class name in fcn_name.
+                    class_name = fcn_name;
+                    fcn_name = arg;
                     pos++;
                     break;
                   }
@@ -438,7 +438,7 @@
               {
                 // It was a line number.  Get function name from debugger.
                 if (m_evaluator.in_debug_repl ())
-                  func_name = m_evaluator.get_user_code ()->profiler_name ();
+                  fcn_name = m_evaluator.get_user_code ()->profiler_name ();
                 else
                   error ("%s: function name must come before line number "
                          "and 'if'", who);
@@ -538,14 +538,14 @@
 %! dbclear all;   # Clear out breakpoints before test
 %! dbstop help;
 %! dbstop in ls;
-%! dbstop help at 104;
-%! dbstop in ls 123;     ## 123 is a comment; code line is at 126
+%! dbstop help at 105;  # 105 is a comment; code line is at 106
+%! dbstop in ls 123;    # 123 is a comment; code line is at 126
 %! dbstop help 204 if a==5;
 %! dbstop if error Octave:undefined-function;
 %! s = dbstatus;
 %! dbclear all;
 %! assert ({s.bkpt(:).name}, {"help", "help", "help>do_contents", "ls", "ls"});
-%! assert ([s.bkpt(:).line], [55, 105, 207, 63, 126]);
+%! assert ([s.bkpt(:).line], [56, 106, 208, 63, 126]);
 %! assert (s.errs, {"Octave:undefined-function"});
 */
 
@@ -670,7 +670,8 @@
   // a breakpoint there.  Put the system into debug_mode.
   int bp_table::add_breakpoint_in_function (const std::string& fname,
                                             const std::string& class_name,
-                                            int line, const std::string& condition)
+                                            int line,
+                                            const std::string& condition)
   {
     bp_lines line_info;
     line_info.insert (line);
--- a/libinterp/parse-tree/bp-table.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/parse-tree/bp-table.h	Mon Aug 29 13:58:00 2022 +0200
@@ -208,9 +208,12 @@
 
     bool condition_valid (const std::string& cond);
 
-    void parse_dbfunction_params (const char *who, const octave_value_list& args,
-                                  std::string& func_name, std::string& class_name,
-                                  bp_table::bp_lines& lines, std::string& cond);
+    void parse_dbfunction_params (const char *who,
+                                  const octave_value_list& args,
+                                  std::string& fcn_name,
+                                  std::string& class_name,
+                                  bp_table::bp_lines& lines,
+                                  std::string& cond);
 
   private:
 
--- a/libinterp/parse-tree/lex.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/parse-tree/lex.h	Mon Aug 29 13:58:00 2022 +0200
@@ -294,7 +294,7 @@
         m_bracketflag (0),
         m_braceflag (0),
         m_looping (0),
-        m_defining_func (0),
+        m_defining_fcn (0),
         m_looking_at_function_handle (0),
         m_block_comment_nesting_level (0),
         m_command_arg_paren_count (0),
@@ -451,7 +451,7 @@
     int m_looping;
 
     // nonzero means we're in the middle of defining a function.
-    int m_defining_func;
+    int m_defining_fcn;
 
     // nonzero means we are parsing a function handle.
     int m_looking_at_function_handle;
@@ -777,7 +777,8 @@
     { }
 
     lexer (FILE *file, interpreter& interp, const std::string& encoding)
-      : base_lexer (interp), m_reader (interp, file, encoding), m_initial_input (true)
+      : base_lexer (interp), m_reader (interp, file, encoding),
+        m_initial_input (true)
     { }
 
     lexer (const std::string& eval_string, interpreter& interp)
--- a/libinterp/parse-tree/lex.ll	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/parse-tree/lex.ll	Mon Aug 29 13:58:00 2022 +0200
@@ -699,7 +699,7 @@
         curr_lexer->m_looking_for_object_index = false;
         curr_lexer->m_at_beginning_of_statement = false;
 
-        if (curr_lexer->m_defining_func
+        if (curr_lexer->m_defining_fcn
             && ! curr_lexer->m_parsed_function_name.top ())
           curr_lexer->m_looking_at_return_list = true;
         else
@@ -2256,7 +2256,7 @@
     m_bracketflag = 0;
     m_braceflag = 0;
     m_looping = 0;
-    m_defining_func = 0;
+    m_defining_fcn = 0;
     m_looking_at_function_handle = 0;
     m_block_comment_nesting_level = 0;
     m_command_arg_paren_count = 0;
@@ -2697,7 +2697,7 @@
 
       case end_kw:
         if (inside_any_object_index ()
-            || (m_defining_func
+            || (m_defining_fcn
                 && ! (m_looking_at_return_list
                       || m_parsed_function_name.top ())))
           {
@@ -2846,7 +2846,7 @@
         break;
 
       case function_kw:
-        m_defining_func++;
+        m_defining_fcn++;
         m_parsed_function_name.push (false);
 
         if (! m_force_script && m_token_count == 0 && input_from_file ())
--- a/libinterp/parse-tree/module.mk	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/parse-tree/module.mk	Mon Aug 29 13:58:00 2022 +0200
@@ -86,6 +86,7 @@
   %reldir%/pt-stmt.cc \
   %reldir%/pt-tm-const.cc \
   %reldir%/pt-unop.cc \
+  %reldir%/pt-vm-eval.cc \
   %reldir%/pt-walk.cc \
   %reldir%/pt.cc \
   %reldir%/token.cc
--- a/libinterp/parse-tree/oct-lvalue.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/parse-tree/oct-lvalue.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -237,8 +237,7 @@
         // could happen because there is an index is out of range
         // and we will be resizing a cell array.
 
-        interpreter& interp
-          = __get_interpreter__ ("octave_lvalue::eval_for_numel");
+        interpreter& interp = __get_interpreter__ ();
 
         interp.recover_from_exception ();
 
--- a/libinterp/parse-tree/oct-lvalue.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/parse-tree/oct-lvalue.h	Mon Aug 29 13:58:00 2022 +0200
@@ -68,7 +68,8 @@
 
     octave_idx_type numel (void) const;
 
-    void set_index (const std::string& t, const std::list<octave_value_list>& i);
+    void set_index (const std::string& t,
+                    const std::list<octave_value_list>& i);
 
     void clear_index (void) { m_type = ""; m_idx.clear (); }
 
@@ -105,8 +106,6 @@
     std::string m_type;
 
     std::list<octave_value_list> m_idx;
-
-    octave_idx_type m_nel;
   };
 }
 
--- a/libinterp/parse-tree/oct-parse.yy	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/parse-tree/oct-parse.yy	Mon Aug 29 13:58:00 2022 +0200
@@ -2099,12 +2099,12 @@
                   {
                     OCTAVE_YYUSE ($3);
 
-                    lexer.m_defining_func++;
+                    lexer.m_defining_fcn++;
                     lexer.m_parsed_function_name.push (false);
                   }
                   method_decl1
                   {
-                    lexer.m_defining_func--;
+                    lexer.m_defining_fcn--;
                     lexer.m_parsed_function_name.pop ();
 
                     $$ = parser.finish_classdef_external_method ($5, $2, $1);
@@ -2996,7 +2996,7 @@
     if (base->is_constant () && limit->is_constant ()
         && (! incr || incr->is_constant ()))
       {
-        interpreter& interp = __get_interpreter__ ("finish_colon_expression");
+        interpreter& interp = __get_interpreter__ ();
 
         try
           {
@@ -4271,7 +4271,7 @@
     m_curr_fcn_depth--;
     m_function_scopes.pop ();
 
-    m_lexer.m_defining_func--;
+    m_lexer.m_defining_fcn--;
     m_lexer.m_parsed_function_name.pop ();
     m_lexer.m_looking_at_return_list = false;
     m_lexer.m_looking_at_parameter_list = false;
@@ -4838,8 +4838,7 @@
 
     if (local_fcns)
       {
-        symbol_table& symtab
-          = __get_symbol_table__ ("base_parser::finish_classdef_file");
+        symbol_table& symtab = __get_symbol_table__ ();
 
         for (tree_statement *elt : *local_fcns)
           {
@@ -5129,8 +5128,7 @@
 
     if (e->is_constant ())
       {
-        tree_evaluator& tw
-          = __get_evaluator__ ("validate_matrix_for_assignment");
+        tree_evaluator& tw = __get_evaluator__ ();
 
         octave_value ov = e->evaluate (tw);
 
@@ -5193,7 +5191,7 @@
 
     if (array_list->all_elements_are_constant ())
       {
-        interpreter& interp = __get_interpreter__ ("finish_array_list");
+        interpreter& interp = __get_interpreter__ ();
 
         try
           {
@@ -5957,7 +5955,7 @@
 
     if (! file.empty ())
       {
-        interpreter& interp = __get_interpreter__ ("get_help_from_file");
+        interpreter& interp = __get_interpreter__ ();
 
         symbol_found = true;
 
@@ -6023,7 +6021,7 @@
 
     int len = file.length ();
 
-    interpreter& interp = __get_interpreter__ ("load_fcn_from_file");
+    interpreter& interp = __get_interpreter__ ();
 
     dynamic_loader& dyn_loader = interp.get_dynamic_loader ();
 
@@ -6190,7 +6188,7 @@
   source_file (const std::string& file_name, const std::string& context,
                bool verbose, bool require_file)
   {
-    interpreter& interp = __get_interpreter__ ("source_file");
+    interpreter& interp = __get_interpreter__ ();
 
     interp.source_file (file_name, context, verbose, require_file);
   }
@@ -6240,7 +6238,7 @@
   octave_value_list
   feval (const char *name, const octave_value_list& args, int nargout)
   {
-    interpreter& interp = __get_interpreter__ ("feval");
+    interpreter& interp = __get_interpreter__ ();
 
     return interp.feval (name, args, nargout);
   }
@@ -6248,7 +6246,7 @@
   octave_value_list
   feval (const std::string& name, const octave_value_list& args, int nargout)
   {
-    interpreter& interp = __get_interpreter__ ("feval");
+    interpreter& interp = __get_interpreter__ ();
 
     return interp.feval (name, args, nargout);
   }
@@ -6256,7 +6254,7 @@
   octave_value_list
   feval (octave_function *fcn, const octave_value_list& args, int nargout)
   {
-    interpreter& interp = __get_interpreter__ ("feval");
+    interpreter& interp = __get_interpreter__ ();
 
     return interp.feval (fcn, args, nargout);
   }
@@ -6264,7 +6262,7 @@
   octave_value_list
   feval (const octave_value& val, const octave_value_list& args, int nargout)
   {
-    interpreter& interp = __get_interpreter__ ("feval");
+    interpreter& interp = __get_interpreter__ ();
 
     return interp.feval (val, args, nargout);
   }
@@ -6272,7 +6270,7 @@
   octave_value_list
   feval (const octave_value_list& args, int nargout)
   {
-    interpreter& interp = __get_interpreter__ ("feval");
+    interpreter& interp = __get_interpreter__ ();
 
     return interp.feval (args, nargout);
   }
--- a/libinterp/parse-tree/profiler.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/parse-tree/profiler.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -52,8 +52,6 @@
     for (const auto& nm : list)
       retval(i++) = nm;
 
-    assert (i == n);
-
     return retval;
   }
 
@@ -88,10 +86,10 @@
   profiler::tree_node*
   profiler::tree_node::exit (octave_idx_type /* fcn */)
   {
-    // FIXME: These assert statements don't make sense if profile() is called
-    //        from within a function hierarchy to begin with.  See bug #39587.
-    //  assert (m_parent);
-    //  assert (m_fcn_id == fcn);
+    // FIXME: These panic_unless statements don't make sense if profile() is
+    //  called from within a function hierarchy to begin with.  See bug #39587.
+    //  panic_unless (m_parent);
+    //  panic_unless (m_fcn_id == fcn);
 
     return m_parent;
   }
@@ -99,7 +97,8 @@
   void
   profiler::tree_node::build_flat (flat_profile& data) const
   {
-    // If this is not the top-level node, update profile entry for this function.
+    // If this is not the top-level node,
+    // update profile entry for this function.
     if (m_fcn_id != 0)
       {
         stats& entry = data[m_fcn_id - 1];
@@ -107,7 +106,7 @@
         entry.m_time += m_time;
         entry.m_calls += m_calls;
 
-        assert (m_parent);
+        panic_unless (m_parent);
         if (m_parent->m_fcn_id != 0)
           {
             entry.m_parents.insert (m_parent->m_fcn_id);
@@ -161,7 +160,6 @@
 
         ++i;
       }
-    assert (i == n);
 
     octave_map retval;
 
@@ -195,8 +193,8 @@
   profiler::enter_function (const std::string& fcn)
   {
     // The enter class will check and only call us if the profiler is active.
-    assert (enabled ());
-    assert (m_call_tree);
+    panic_unless (enabled ());
+    panic_unless (m_call_tree);
 
     // If there is already an active function, add to its time before
     // pushing the new one.
@@ -229,21 +227,23 @@
   {
     if (m_active_fcn)
       {
-        assert (m_call_tree);
-        // FIXME: This assert statements doesn't make sense if profile() is called
-        //        from within a function hierarchy to begin with.  See bug #39587.
-        //assert (m_active_fcn != m_call_tree);
+        panic_unless (m_call_tree);
+        // FIXME: This panic_unless statements doesn't make sense if profile()
+        //        is called from within a function hierarchy to begin with.
+        //        See bug #39587.
+        // panic_unless (m_active_fcn != m_call_tree);
 
-        // Usually, if we are disabled this function is not even called.  But the
-        // call disabling the profiler is an exception.  So also check here
+        // Usually, if we are disabled this function is not even called.  But
+        // the call disabling the profiler is an exception.  So also check here
         // and only record the time if enabled.
         if (enabled ())
           add_current_time ();
 
         fcn_index_map::iterator pos = m_fcn_index.find (fcn);
-        // FIXME: This assert statements doesn't make sense if profile() is called
-        //        from within a function hierarchy to begin with.  See bug #39587.
-        //assert (pos != m_fcn_index.end ());
+        // FIXME: This panic_unless statements doesn't make sense if profile()
+        //        is called from within a function hierarchy to begin with.
+        //        See bug #39587.
+        // panic_unless (pos != m_fcn_index.end ());
         m_active_fcn = m_active_fcn->exit (pos->second);
 
         // If this was an "inner call", we resume executing the parent function
@@ -385,7 +385,7 @@
 // Enable or disable the profiler data collection.
 DEFMETHOD (__profiler_enable__, interp, args, ,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __profiler_enable__ ()
+@deftypefn {} {@var{state} =} __profiler_enable__ ()
 Undocumented internal function.
 @end deftypefn */)
 {
@@ -431,7 +431,7 @@
 // Query the timings collected by the profiler.
 DEFMETHOD (__profiler_data__, interp, args, nargout,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} __profiler_data__ ()
+@deftypefn {} {@var{data} =} __profiler_data__ ()
 Undocumented internal function.
 @end deftypefn */)
 {
--- a/libinterp/parse-tree/profiler.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/parse-tree/profiler.h	Mon Aug 29 13:58:00 2022 +0200
@@ -185,7 +185,8 @@
 
     // Each function we see in the profiler is given a unique index (which
     // simply counts starting from 1).  We thus have to map profiler-names to
-    // those indices.  For all other stuff, we identify functions by their index.
+    // those indices.  For all other stuff, we identify functions by their
+    // index.
 
     typedef std::vector<std::string> function_set;
     typedef std::map<std::string, octave_idx_type> fcn_index_map;
@@ -198,7 +199,8 @@
     tree_node *m_call_tree;
     tree_node *m_active_fcn;
 
-    // Store last timestamp we had, when the currently active function was called.
+    // Store last timestamp we had, when the currently active function was
+    // called.
     double m_last_time;
 
     // These are private as only the unwind-protecting inner class enter
--- a/libinterp/parse-tree/pt-binop.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/parse-tree/pt-binop.h	Mon Aug 29 13:58:00 2022 +0200
@@ -76,7 +76,8 @@
 
     void mark_braindead_shortcircuit (void)
     {
-      if (m_etype == octave_value::op_el_and || m_etype == octave_value::op_el_or)
+      if (m_etype == octave_value::op_el_and
+          || m_etype == octave_value::op_el_or)
         {
           m_eligible_for_braindead_shortcircuit = true;
 
--- a/libinterp/parse-tree/pt-classdef.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/parse-tree/pt-classdef.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -61,10 +61,9 @@
         // part of an index expression.  It is also not an identifier in
         // the syntax tree but we need to handle it as if it were.  So
         // call the function here.
-
         octave_function *f = tmp.function_value (true);
 
-        assert (f);
+        panic_unless (f);
 
         return f->call (tw, nargout);
       }
--- a/libinterp/parse-tree/pt-colon.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/parse-tree/pt-colon.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -42,7 +42,8 @@
     tree_colon_expression *new_ce
       = new tree_colon_expression (m_base ? m_base->dup (scope) : nullptr,
                                    m_limit ? m_limit->dup (scope) : nullptr,
-                                   m_increment ? m_increment->dup (scope) : nullptr,
+                                   m_increment ? m_increment->dup (scope)
+                                               : nullptr,
                                    line (), column ());
 
     new_ce->copy_base (*this);
--- a/libinterp/parse-tree/pt-eval.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/parse-tree/pt-eval.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -53,9 +53,11 @@
 #include "input.h"
 #include "interpreter-private.h"
 #include "interpreter.h"
+#include "mex-private.h"
 #include "octave.h"
 #include "ov-classdef.h"
 #include "ov-fcn-handle.h"
+#include "ov-mex-fcn.h"
 #include "ov-usr-fcn.h"
 #include "ov-re-sparse.h"
 #include "ov-cx-sparse.h"
@@ -107,7 +109,7 @@
       };
 
     debugger (interpreter& interp, std::size_t level)
-      : m_interpreter (interp), m_level (level), m_debug_frame (0),
+      : m_interpreter (interp), m_level (level),
         m_execution_mode (EX_NORMAL), m_in_debug_repl (false)
     { }
 
@@ -134,7 +136,6 @@
     interpreter& m_interpreter;
 
     std::size_t m_level;
-    std::size_t m_debug_frame;
     execution_mode m_execution_mode;
     bool m_in_debug_repl;
   };
@@ -3324,11 +3325,162 @@
       body->accept (*this);
   }
 
-  void
-  tree_evaluator::visit_octave_user_script (octave_user_script&)
-  {
-    // ??
-    panic_impossible ();
+  octave_value
+  tree_evaluator::evaluate_anon_fcn_handle (tree_anon_fcn_handle& afh)
+  {
+    // FIXME: should CMD_LIST be limited to a single expression?
+    // I think that is what Matlab does.
+
+    symbol_scope new_scope;
+    symbol_scope scope = afh.scope ();
+    if (scope)
+      new_scope = scope.dup ();
+
+    tree_parameter_list *param_list = afh.parameter_list ();
+    tree_parameter_list *param_list_dup
+      = param_list ? param_list->dup (new_scope) : nullptr;
+
+    tree_parameter_list *ret_list = nullptr;
+
+    tree_statement_list *stmt_list = nullptr;
+
+    symbol_scope parent_scope = get_current_scope ();
+
+    new_scope.set_parent (parent_scope);
+    new_scope.set_primary_parent (parent_scope);
+
+    tree_expression *expr = afh.expression ();
+    if (expr)
+      {
+        tree_expression *expr_dup = expr->dup (new_scope);
+        tree_statement *stmt = new tree_statement (expr_dup, nullptr);
+        stmt_list = new tree_statement_list (stmt);
+      }
+
+    tree_anon_scopes anon_fcn_ctx (afh);
+
+    std::set<std::string> free_vars = anon_fcn_ctx.free_variables ();
+
+    stack_frame::local_vars_map local_vars;
+
+    std::shared_ptr<stack_frame> frame
+      = m_call_stack.get_current_stack_frame ();
+
+    for (auto& name : free_vars)
+      {
+        octave_value val = frame->varval (name);
+
+        if (val.is_defined ())
+          local_vars[name] = val;
+      }
+
+    octave_user_function *af
+      = new octave_user_function (new_scope, param_list_dup, ret_list,
+                                  stmt_list);
+
+    octave_function *curr_fcn = m_call_stack.current_function ();
+
+    bool is_nested = false;
+
+    if (curr_fcn)
+      {
+        // FIXME: maybe it would be better to just stash curr_fcn
+        // instead of individual bits of info about it?
+
+        // An anonymous function defined inside another nested function
+        // or parent of a nested function also behaves like a nested
+        // function.
+
+        if (curr_fcn->is_parent_function () || curr_fcn->is_nested_function ())
+          {
+            is_nested = true;
+            af->mark_as_nested_function ();
+            new_scope.set_nesting_depth (parent_scope.nesting_depth () + 1);
+          }
+
+        af->stash_dir_name (curr_fcn->dir_name ());
+
+        new_scope.cache_fcn_file_name (curr_fcn->fcn_file_name ());
+        new_scope.cache_dir_name (curr_fcn->dir_name ());
+
+        // The following is needed so that class method dispatch works
+        // properly for anonymous functions that wrap class methods.
+
+        if (curr_fcn->is_class_method () || curr_fcn->is_class_constructor ())
+          af->stash_dispatch_class (curr_fcn->dispatch_class ());
+
+        af->stash_fcn_file_name (curr_fcn->fcn_file_name ());
+      }
+
+    af->mark_as_anonymous_function ();
+
+    octave_value ov_fcn (af);
+
+    return (is_nested
+            ? octave_value (new octave_fcn_handle (ov_fcn, local_vars, frame))
+            : octave_value (new octave_fcn_handle (ov_fcn, local_vars)));
+  }
+
+  octave_value_list
+  tree_evaluator::execute_builtin_function (octave_builtin& builtin_function,
+                                            int nargout,
+                                            const octave_value_list& args)
+  {
+    octave_value_list retval;
+
+    if (args.has_magic_colon ())
+      error ("invalid use of colon in function argument list");
+
+    profiler::enter<octave_builtin> block (m_profiler, builtin_function);
+
+    octave_builtin::fcn fcn = builtin_function.function ();
+
+    if (fcn)
+      retval = (*fcn) (args, nargout);
+    else
+      {
+        octave_builtin::meth meth = builtin_function.method ();
+
+        retval = (*meth) (m_interpreter, args, nargout);
+      }
+
+    // Do not allow null values to be returned from functions.
+    // FIXME: perhaps true builtins should be allowed?
+
+    retval.make_storable_values ();
+
+    // Fix the case of a single undefined value.
+    // This happens when a compiled function uses
+    //
+    //   octave_value retval;
+    //
+    // instead of
+    //
+    //   octave_value_list retval;
+    //
+    // the idiom is very common, so we solve that here.
+
+    if (retval.length () == 1 && retval.xelem (0).is_undefined ())
+      retval.clear ();
+
+    return retval;
+  }
+
+  octave_value_list
+  tree_evaluator::execute_mex_function (octave_mex_function& mex_function,
+                                        int nargout,
+                                        const octave_value_list& args)
+  {
+    octave_value_list retval;
+
+    if (args.has_magic_colon ())
+      error ("invalid use of colon in function argument list");
+
+    profiler::enter<octave_mex_function> block (m_profiler, mex_function);
+
+    retval = call_mex (mex_function, args, nargout);
+
+    return retval;
   }
 
   octave_value_list
@@ -3375,7 +3527,7 @@
   }
 
   void
-  tree_evaluator::visit_octave_user_function (octave_user_function&)
+  tree_evaluator::visit_octave_user_script (octave_user_script&)
   {
     // ??
     panic_impossible ();
@@ -3495,7 +3647,7 @@
 
         if (user_function.is_special_expr ())
           {
-            assert (cmd_list->length () == 1);
+            panic_if (cmd_list->length () != 1);
 
             tree_statement *stmt = cmd_list->front ();
 
@@ -3541,6 +3693,13 @@
   }
 
   void
+  tree_evaluator::visit_octave_user_function (octave_user_function&)
+  {
+    // ??
+    panic_impossible ();
+  }
+
+  void
   tree_evaluator::visit_octave_user_function_header (octave_user_function&)
   {
     panic_impossible ();
@@ -4309,11 +4468,11 @@
           {
             if (m_dbstep_flag == 1 || is_end_of_fcn_or_script)
               {
-                // We get here if we are doing a "dbstep" or a "dbstep N" and the
-                // count has reached 1 so that we must stop and return to debug
-                // prompt.  Alternatively, "dbstep N" has been used but the end
-                // of the frame has been reached so we stop at the last line and
-                // return to prompt.
+                // We get here if we are doing a "dbstep" or a "dbstep N" and
+                // the count has reached 1 so that we must stop and return to
+                // debug prompt.  Alternatively, "dbstep N" has been used but
+                // the end of the frame has been reached so we stop at the last
+                // line and return to prompt.
 
                 break_on_this_statement = true;
               }
@@ -4421,13 +4580,13 @@
 
   octave_map tree_evaluator::get_autoload_map (void) const
   {
-    Cell func_names (dim_vector (m_autoload_map.size (), 1));
+    Cell fcn_names (dim_vector (m_autoload_map.size (), 1));
     Cell file_names (dim_vector (m_autoload_map.size (), 1));
 
     octave_idx_type i = 0;
     for (const auto& fcn_fname : m_autoload_map)
       {
-        func_names(i) = fcn_fname.first;
+        fcn_names(i) = fcn_fname.first;
         file_names(i) = fcn_fname.second;
 
         i++;
@@ -4435,7 +4594,7 @@
 
     octave_map m;
 
-    m.assign ("function", func_names);
+    m.assign ("function", fcn_names);
     m.assign ("file", file_names);
 
     return m;
@@ -5120,7 +5279,7 @@
            doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} max_recursion_depth ()
 @deftypefnx {} {@var{old_val} =} max_recursion_depth (@var{new_val})
-@deftypefnx {} {} max_recursion_depth (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} max_recursion_depth (@var{new_val}, "local")
 Query or set the internal limit on the number of times a function may
 be called recursively.
 
@@ -5155,7 +5314,7 @@
            doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} whos_line_format ()
 @deftypefnx {} {@var{old_val} =} whos_line_format (@var{new_val})
-@deftypefnx {} {} whos_line_format (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} whos_line_format (@var{new_val}, "local")
 Query or set the format string used by the command @code{whos}.
 
 A full format string is:
@@ -5236,7 +5395,7 @@
            doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} silent_functions ()
 @deftypefnx {} {@var{old_val} =} silent_functions (@var{new_val})
-@deftypefnx {} {} silent_functions (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} silent_functions (@var{new_val}, "local")
 Query or set the internal variable that controls whether internal
 output from a function is suppressed.
 
@@ -5270,7 +5429,7 @@
            doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} string_fill_char ()
 @deftypefnx {} {@var{old_val} =} string_fill_char (@var{new_val})
-@deftypefnx {} {} string_fill_char (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} string_fill_char (@var{new_val}, "local")
 Query or set the internal variable used to pad all rows of a character
 matrix to the same length.
 
@@ -5319,7 +5478,7 @@
            doc: /* -*- texinfo -*-
 @deftypefn  {} {@var{val} =} PS4 ()
 @deftypefnx {} {@var{old_val} =} PS4 (@var{new_val})
-@deftypefnx {} {} PS4 (@var{new_val}, "local")
+@deftypefnx {} {@var{old_val} =} PS4 (@var{new_val}, "local")
 Query or set the character string used to prefix output produced
 when echoing commands is enabled.
 
--- a/libinterp/parse-tree/pt-eval.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/parse-tree/pt-eval.h	Mon Aug 29 13:58:00 2022 +0200
@@ -44,7 +44,11 @@
 #include "pt-walk.h"
 #include "stack-frame.h"
 
+class octave_builtin;
+class octave_mex_function;
 class octave_user_code;
+class octave_user_function;
+class octave_user_script;
 
 OCTAVE_NAMESPACE_BEGIN
 
@@ -246,6 +250,15 @@
 
     void visit_spmd_command (tree_spmd_command&);
 
+    octave_value evaluate_anon_fcn_handle (tree_anon_fcn_handle& afh);
+
+    octave_value_list
+    execute_builtin_function (octave_builtin& builtin_function, int nargout,
+                              const octave_value_list& args);
+    octave_value_list
+    execute_mex_function (octave_mex_function& mex_function, int nargout,
+                          const octave_value_list& args);
+
     void visit_octave_user_script (octave_user_script&);
 
     octave_value_list
@@ -417,8 +430,6 @@
 
     profiler& get_profiler (void) { return m_profiler; }
 
-    call_stack& get_call_stack (void) { return m_call_stack; }
-
     void push_stack_frame (const symbol_scope& scope);
 
     void push_stack_frame (octave_user_function *fcn,
--- a/libinterp/parse-tree/pt-exp.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/parse-tree/pt-exp.h	Mon Aug 29 13:58:00 2022 +0200
@@ -91,7 +91,8 @@
 
     int paren_count (void) const { return m_num_parens; }
 
-    bool is_postfix_indexed (void) const { return (m_postfix_index_type != '\0'); }
+    bool is_postfix_indexed (void) const
+    { return (m_postfix_index_type != '\0'); }
 
     char postfix_index (void) const { return m_postfix_index_type; }
 
--- a/libinterp/parse-tree/pt-fcn-handle.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/parse-tree/pt-fcn-handle.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -101,95 +101,7 @@
   octave_value
   tree_anon_fcn_handle::evaluate (tree_evaluator& tw, int)
   {
-    // FIXME: should CMD_LIST be limited to a single expression?
-    // I think that is what Matlab does.
-
-    symbol_scope new_scope;
-    if (m_scope)
-      new_scope = m_scope.dup ();
-
-    tree_parameter_list *param_list_dup
-      = m_parameter_list ? m_parameter_list->dup (new_scope) : nullptr;
-
-    tree_parameter_list *ret_list = nullptr;
-
-    tree_statement_list *stmt_list = nullptr;
-
-    symbol_scope parent_scope = tw.get_current_scope ();
-
-    new_scope.set_parent (parent_scope);
-    new_scope.set_primary_parent (parent_scope);
-
-    if (m_expression)
-      {
-        tree_expression *expr_dup = m_expression->dup (new_scope);
-        tree_statement *stmt = new tree_statement (expr_dup, nullptr);
-        stmt_list = new tree_statement_list (stmt);
-      }
-
-    tree_anon_scopes anon_fcn_ctx (*this);
-
-    std::set<std::string> free_vars = anon_fcn_ctx.free_variables ();
-
-    stack_frame::local_vars_map local_vars;
-
-    call_stack& cs = tw.get_call_stack ();
-
-    std::shared_ptr<stack_frame> frame = cs.get_current_stack_frame ();
-
-    for (auto& name : free_vars)
-      {
-        octave_value val = frame->varval (name);
-
-        if (val.is_defined ())
-          local_vars[name] = val;
-      }
-
-    octave_user_function *af
-      = new octave_user_function (new_scope, param_list_dup, ret_list,
-                                  stmt_list);
-
-    octave_function *curr_fcn = cs.current_function ();
-
-    bool is_nested = false;
-
-    if (curr_fcn)
-      {
-        // FIXME: maybe it would be better to just stash curr_fcn
-        // instead of individual bits of info about it?
-
-        // An anonymous function defined inside another nested function
-        // or parent of a nested function also behaves like a nested
-        // function.
-
-        if (curr_fcn->is_parent_function () || curr_fcn->is_nested_function ())
-          {
-            is_nested = true;
-            af->mark_as_nested_function ();
-            new_scope.set_nesting_depth (parent_scope.nesting_depth () + 1);
-          }
-
-        af->stash_dir_name (curr_fcn->dir_name ());
-
-        new_scope.cache_fcn_file_name (curr_fcn->fcn_file_name ());
-        new_scope.cache_dir_name (curr_fcn->dir_name ());
-
-        // The following is needed so that class method dispatch works
-        // properly for anonymous functions that wrap class methods.
-
-        if (curr_fcn->is_class_method () || curr_fcn->is_class_constructor ())
-          af->stash_dispatch_class (curr_fcn->dispatch_class ());
-
-        af->stash_fcn_file_name (curr_fcn->fcn_file_name ());
-      }
-
-    af->mark_as_anonymous_function ();
-
-    octave_value ov_fcn (af);
-
-    return (is_nested
-            ? octave_value (new octave_fcn_handle (ov_fcn, local_vars, frame))
-            : octave_value (new octave_fcn_handle (ov_fcn, local_vars)));
+    return tw.evaluate_anon_fcn_handle (*this);
   }
 }
 
--- a/libinterp/parse-tree/pt-idx.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/parse-tree/pt-idx.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -346,7 +346,7 @@
   {
     octave_value_list retval;
 
-    assert (! m_args.empty ());
+    panic_if (m_args.empty ());
 
     auto p_args = m_args.begin ();
     auto p_arg_nm = m_arg_nm.begin ();
--- a/libinterp/parse-tree/pt-pr-code.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/parse-tree/pt-pr-code.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -1203,7 +1203,7 @@
   void
   tree_print_code::indent (void)
   {
-    assert (m_curr_print_indent_level >= 0);
+    panic_unless (m_curr_print_indent_level >= 0);
 
     if (m_beginning_of_line)
       {
--- a/libinterp/parse-tree/pt-select.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/parse-tree/pt-select.h	Mon Aug 29 13:58:00 2022 +0200
@@ -45,7 +45,8 @@
   public:
 
     tree_if_clause (int l = -1, int c = -1)
-      : tree (l, c), m_expr (nullptr), m_list (nullptr), m_lead_comm (nullptr) { }
+      : tree (l, c), m_expr (nullptr), m_list (nullptr), m_lead_comm (nullptr)
+    { }
 
     tree_if_clause (tree_statement_list *sl, comment_list *lc = nullptr,
                     int l = -1, int c = -1)
@@ -130,7 +131,8 @@
 
     tree_if_command (tree_if_command_list *lst, comment_list *lc,
                      comment_list *tc, int l = -1, int c = -1)
-      : tree_command (l, c), m_list (lst), m_lead_comm (lc), m_trail_comm (tc) { }
+      : tree_command (l, c), m_list (lst), m_lead_comm (lc), m_trail_comm (tc)
+    { }
 
     // No copying!
 
@@ -170,7 +172,8 @@
   public:
 
     tree_switch_case (int l = -1, int c = -1)
-      : tree (l, c), m_label (nullptr), m_list (nullptr), m_lead_comm (nullptr) { }
+      : tree (l, c), m_label (nullptr), m_list (nullptr), m_lead_comm (nullptr)
+    { }
 
     tree_switch_case (tree_statement_list *sl, comment_list *lc = nullptr,
                       int l = -1, int c = -1)
--- a/libinterp/parse-tree/pt-tm-const.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/parse-tree/pt-tm-const.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -608,7 +608,8 @@
           {
             // Optimize all scalars case.
             TYPE result (m_dv);
-            assert (static_cast<std::size_t> (result.numel ()) == row.length ());
+            panic_unless (static_cast<std::size_t> (result.numel ())
+                          == row.length ());
             octave_idx_type i = 0;
             for (const auto& elt : row)
               result(i++) = octave_value_extract<ELT_T> (elt);
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libinterp/parse-tree/pt-vm-eval.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -0,0 +1,72 @@
+////////////////////////////////////////////////////////////////////////
+//
+// Copyright (C) 2022 The Octave Project Developers
+//
+// See the file COPYRIGHT.md in the top-level directory of this
+// distribution or <https://octave.org/copyright/>.
+//
+// This file is part of Octave.
+//
+// Octave is free software: you can redistribute it and/or modify it
+// under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Octave is distributed in the hope that it will be useful, but
+// WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Octave; see the file COPYING.  If not, see
+// <https://www.gnu.org/licenses/>.
+//
+////////////////////////////////////////////////////////////////////////
+
+#if defined (HAVE_CONFIG_H)
+#  include "config.h"
+#endif
+
+#include "defun.h"
+#include "variables.h"
+
+OCTAVE_NAMESPACE_BEGIN
+
+// If TRUE, use VM evaluator rather than tree walker.
+
+static bool V__enable_vm_eval__ = false;
+
+DEFUN (__enable_vm_eval__, args, nargout,
+       doc: /* -*- texinfo -*-
+@deftypefn  {} {@var{val} =} __enable_vm_eval__ ()
+@deftypefnx {} {@var{old_val} =} __enable_vm_eval__ (@var{new_val})
+@deftypefnx {} {@var{old_val} =} __enable_vm_eval__ (@var{new_val}, "local")
+Query or set whether Octave uses a virtual machine (VM) for evaluation of
+parsed statements.
+
+The default value is false.  When false, Octave uses a traditional tree walker
+to evaluate statements parsed from m-code.  When true, Octave translates parsed
+statements to an intermediate representation that is then evaluated by a
+virtual machine.
+
+When called from inside a function with the @qcode{"local"} option, the setting
+is changed locally for the function and any subroutines it calls.  The original
+setting is restored when exiting the function.
+@end deftypefn */)
+{
+#if defined (OCTAVE_ENABLE_VM_EVALUATOR)
+
+  return set_internal_variable (V__enable_vm_eval__, args, nargout,
+                                "__enable_vm_eval__");
+
+#else
+
+  octave_unused_parameter (args);
+
+  err_disabled_feature ("vm-evaluator",
+                        "using a Virtual Machine for statement evaluation");
+
+#endif
+}
+
+OCTAVE_NAMESPACE_END
--- a/libinterp/parse-tree/token.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/libinterp/parse-tree/token.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -29,6 +29,7 @@
 
 #include <cassert>
 
+#include "error.h"
 #include "token.h"
 
 namespace octave
@@ -95,14 +96,14 @@
   std::string
   token::text (void) const
   {
-    assert (m_type_tag == string_token);
+    panic_if (m_type_tag != string_token);
     return *m_tok_info.m_str;
   }
 
   octave_value
   token::number (void) const
   {
-    assert (m_type_tag == numeric_token);
+    panic_if (m_type_tag != numeric_token);
     return *m_tok_info.m_num;
   }
 
@@ -115,21 +116,21 @@
   token::end_tok_type
   token::ettype (void) const
   {
-    assert (m_type_tag == ettype_token);
+    panic_if (m_type_tag != ettype_token);
     return m_tok_info.m_et;
   }
 
   std::string
   token::superclass_method_name (void) const
   {
-    assert (m_type_tag == scls_name_token);
+    panic_if (m_type_tag != scls_name_token);
     return m_tok_info.m_superclass_info->m_method_name;
   }
 
   std::string
   token::superclass_class_name (void) const
   {
-    assert (m_type_tag == scls_name_token);
+    panic_if (m_type_tag != scls_name_token);
     return m_tok_info.m_superclass_info->m_class_name;
   }
 
--- a/liboctave/array/Array-util.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/liboctave/array/Array-util.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -623,17 +623,16 @@
   Array<octave::idx_vector> retval (dim_vector (n, 1));
   octave_idx_type numel = dv.numel ();
 
-  if (idx.extent (numel) > numel)
-    (*current_liboctave_error_handler) ("ind2sub: index out of range");
-
   if (idx.is_scalar ())
     {
       octave_idx_type k = idx(0);
-      for (octave_idx_type j = 0; j < n; j++)
+      for (octave_idx_type j = 0; j < n-1; j++)
         {
           retval(j) = k % dv(j);
           k /= dv(j);
         }
+
+      retval(n-1) = idx(0) < numel ? k % dv(n-1) : k;
     }
   else
     {
@@ -646,11 +645,13 @@
       for (octave_idx_type i = 0; i < len; i++)
         {
           octave_idx_type k = idx(i);
-          for (octave_idx_type j = 0; j < n; j++)
+          for (octave_idx_type j = 0; j < n-1; j++)
             {
               rdata[j](i) = k % dv(j);
               k /= dv(j);
             }
+
+          rdata[n-1](i) = idx(i) < numel ? k % dv(n-1) : k;
         }
 
       for (octave_idx_type j = 0; j < n; j++)
--- a/liboctave/array/idx-vector.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/liboctave/array/idx-vector.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -103,8 +103,10 @@
                                             octave_idx_type limit,
                                             octave_idx_type step)
     : idx_base_rep (), m_start(start),
-      m_len (step ? std::max ((limit - start) / step,
-                              static_cast<octave_idx_type> (0))
+      // Round length away from zero to catch incomplete intervals
+      m_len (step
+             ? std::max ((limit - start + step - (step > 0 ? 1 : -1)) / step,
+                         static_cast<octave_idx_type> (0))
              : -1),
       m_step (step)
   {
--- a/liboctave/array/idx-vector.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/liboctave/array/idx-vector.h	Mon Aug 29 13:58:00 2022 +0200
@@ -171,7 +171,8 @@
                      octave_idx_type step, direct)
         : idx_base_rep (), m_start (start), m_len (len), m_step (step) { }
 
-      // Zero-based constructor.
+      // Zero-based constructor for index range starting at `start` (inclusive)
+      // and ending at `limit` (exclusive) in steps of `step`.
       idx_range_rep (octave_idx_type start, octave_idx_type limit,
                      octave_idx_type step);
 
--- a/liboctave/numeric/DAEFunc.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/liboctave/numeric/DAEFunc.h	Mon Aug 29 13:58:00 2022 +0200
@@ -48,22 +48,22 @@
                                 double t, double cj);
 
   DAEFunc (void)
-    : m_fun (nullptr), m_jac (nullptr), m_reset (true) { }
+    : m_fcn (nullptr), m_jac (nullptr), m_reset (true) { }
 
   DAEFunc (DAERHSFunc f)
-    : m_fun (f), m_jac (nullptr), m_reset (true) { }
+    : m_fcn (f), m_jac (nullptr), m_reset (true) { }
 
   DAEFunc (DAERHSFunc f, DAEJacFunc j)
-    : m_fun (f), m_jac (j), m_reset (true) { }
+    : m_fcn (f), m_jac (j), m_reset (true) { }
 
   DAEFunc (const DAEFunc& a)
-    : m_fun (a.m_fun), m_jac (a.m_jac), m_reset (a.m_reset) { }
+    : m_fcn (a.m_fcn), m_jac (a.m_jac), m_reset (a.m_reset) { }
 
   DAEFunc& operator = (const DAEFunc& a)
   {
     if (this != &a)
       {
-        m_fun = a.m_fun;
+        m_fcn = a.m_fcn;
         m_jac = a.m_jac;
         m_reset = a.m_reset;
       }
@@ -72,11 +72,11 @@
 
   virtual ~DAEFunc (void) = default;
 
-  DAERHSFunc function (void) const { return m_fun; }
+  DAERHSFunc function (void) const { return m_fcn; }
 
   DAEFunc& set_function (DAERHSFunc f)
   {
-    m_fun = f;
+    m_fcn = f;
     m_reset = true;
     return *this;
   }
@@ -92,7 +92,7 @@
 
 protected:
 
-  DAERHSFunc m_fun;
+  DAERHSFunc m_fcn;
   DAEJacFunc m_jac;
 
   // This variable is TRUE when this object is constructed, and also
--- a/liboctave/numeric/DASPK.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/liboctave/numeric/DASPK.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -61,7 +61,7 @@
                              daspk_jac_ptr, daspk_psol_ptr);
 }
 
-static DAEFunc::DAERHSFunc user_fun;
+static DAEFunc::DAERHSFunc user_fcn;
 static DAEFunc::DAEJacFunc user_jac;
 static F77_INT nn;
 
@@ -81,7 +81,7 @@
 
   octave_idx_type tmp_ires = ires;
 
-  tmp_delta = user_fun (tmp_state, tmp_deriv, time, tmp_ires);
+  tmp_delta = user_fcn (tmp_state, tmp_deriv, time, tmp_ires);
 
   ires = octave::to_f77_int (tmp_ires);
 
@@ -172,14 +172,14 @@
 
       // DAEFunc
 
-      user_fun = DAEFunc::function ();
+      user_fcn = DAEFunc::function ();
       user_jac = DAEFunc::jacobian_function ();
 
-      if (user_fun)
+      if (user_fcn)
         {
           octave_idx_type ires = 0;
 
-          ColumnVector res = (*user_fun) (m_x, m_xdot, m_t, ires);
+          ColumnVector res = (*user_fcn) (m_x, m_xdot, m_t, ires);
 
           if (res.numel () != m_x.numel ())
             {
--- a/liboctave/numeric/DASSL.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/liboctave/numeric/DASSL.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -55,7 +55,7 @@
                              dassl_jac_ptr);
 }
 
-static DAEFunc::DAERHSFunc user_fun;
+static DAEFunc::DAERHSFunc user_fcn;
 static DAEFunc::DAEJacFunc user_jac;
 
 static F77_INT nn;
@@ -78,7 +78,7 @@
 
   octave_idx_type tmp_ires = ires;
 
-  tmp_delta = user_fun (tmp_state, tmp_deriv, time, tmp_ires);
+  tmp_delta = user_fcn (tmp_state, tmp_deriv, time, tmp_ires);
 
   ires = octave::to_f77_int (tmp_ires);
 
@@ -161,14 +161,14 @@
 
       // DAEFunc
 
-      user_fun = DAEFunc::function ();
+      user_fcn = DAEFunc::function ();
       user_jac = DAEFunc::jacobian_function ();
 
-      if (user_fun)
+      if (user_fcn)
         {
           octave_idx_type ires = 0;
 
-          ColumnVector res = (*user_fun) (m_x, m_xdot, m_t, ires);
+          ColumnVector res = (*user_fcn) (m_x, m_xdot, m_t, ires);
 
           if (res.numel () != m_x.numel ())
             {
--- a/liboctave/numeric/LSODE.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/liboctave/numeric/LSODE.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -52,7 +52,7 @@
                              F77_INT&);
 }
 
-static ODEFunc::ODERHSFunc user_fun;
+static ODEFunc::ODERHSFunc user_fcn;
 static ODEFunc::ODEJacFunc user_jac;
 static ColumnVector *tmp_x;
 
@@ -66,7 +66,7 @@
   //       In that case we have to create a temporary vector object
   //       and copy.
 
-  tmp_deriv = (*user_fun) (*tmp_x, time);
+  tmp_deriv = (*user_fcn) (*tmp_x, time);
 
   if (tmp_deriv.isempty ())
     ierr = -1;
@@ -192,10 +192,10 @@
 
       tmp_x = &m_x;
 
-      user_fun = function ();
+      user_fcn = function ();
       user_jac = jacobian_function ();
 
-      ColumnVector m_xdot = (*user_fun) (m_x, m_t);
+      ColumnVector m_xdot = (*user_fcn) (m_x, m_t);
 
       if (m_x.numel () != m_xdot.numel ())
         {
--- a/liboctave/numeric/ODEFunc.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/liboctave/numeric/ODEFunc.h	Mon Aug 29 13:58:00 2022 +0200
@@ -39,22 +39,22 @@
   typedef Matrix (*ODEJacFunc) (const ColumnVector&, double);
 
   ODEFunc (void)
-    : m_fun (nullptr), m_jac (nullptr), m_reset (true) { }
+    : m_fcn (nullptr), m_jac (nullptr), m_reset (true) { }
 
   ODEFunc (ODERHSFunc f)
-    : m_fun (f), m_jac (nullptr), m_reset (true) { }
+    : m_fcn (f), m_jac (nullptr), m_reset (true) { }
 
   ODEFunc (ODERHSFunc f, ODEJacFunc j)
-    : m_fun (f), m_jac (j), m_reset (true) { }
+    : m_fcn (f), m_jac (j), m_reset (true) { }
 
   ODEFunc (const ODEFunc& a)
-    : m_fun (a.m_fun), m_jac (a.m_jac), m_reset (true) { }
+    : m_fcn (a.m_fcn), m_jac (a.m_jac), m_reset (true) { }
 
   ODEFunc& operator = (const ODEFunc& a)
   {
     if (this != &a)
       {
-        m_fun = a.m_fun;
+        m_fcn = a.m_fcn;
         m_jac = a.m_jac;
         m_reset = a.m_reset;
       }
@@ -63,11 +63,11 @@
 
   virtual ~ODEFunc (void) = default;
 
-  ODERHSFunc function (void) const { return m_fun; }
+  ODERHSFunc function (void) const { return m_fcn; }
 
   ODEFunc& set_function (ODERHSFunc f)
   {
-    m_fun = f;
+    m_fcn = f;
     m_reset = true;
     return *this;
   }
@@ -83,7 +83,7 @@
 
 protected:
 
-  ODERHSFunc m_fun;
+  ODERHSFunc m_fcn;
   ODEJacFunc m_jac;
 
   // This variable is TRUE when this object is constructed, and also
--- a/liboctave/numeric/eigs-base.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/liboctave/numeric/eigs-base.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -1378,7 +1378,7 @@
 
 template <typename M>
 octave_idx_type
-EigsRealSymmetricFunc (EigsFunc fun, octave_idx_type n_arg,
+EigsRealSymmetricFunc (EigsFunc fcn, octave_idx_type n_arg,
                        const std::string& _typ, double sigma,
                        octave_idx_type k_arg, octave_idx_type p_arg,
                        octave_idx_type& info, Matrix& eig_vec,
@@ -1592,7 +1592,7 @@
                     mtmp(i, 0) = workd[i + iptr(0) - 1];
 
                   mtmp = utsolve (bt, permB, mtmp);
-                  ColumnVector y = fun (mtmp, err);
+                  ColumnVector y = fcn (mtmp, err);
 
                   if (err)
                     return false;
@@ -1615,7 +1615,7 @@
                       for (F77_INT i = 0; i < n; i++)
                         x(i) = dtmp[i];
 
-                      ColumnVector y = fun (x, err);
+                      ColumnVector y = fcn (x, err);
 
                       if (err)
                         return false;
@@ -1634,7 +1634,7 @@
                       for (F77_INT i = 0; i < n; i++)
                         x(i) = *ip2++;
 
-                      ColumnVector y = fun (x, err);
+                      ColumnVector y = fcn (x, err);
 
                       if (err)
                         return false;
@@ -1653,7 +1653,7 @@
               for (F77_INT i = 0; i < n; i++)
                 x(i) = *ip2++;
 
-              ColumnVector y = fun (x, err);
+              ColumnVector y = fcn (x, err);
 
               if (err)
                 return false;
@@ -2482,7 +2482,7 @@
 
 template <typename M>
 octave_idx_type
-EigsRealNonSymmetricFunc (EigsFunc fun, octave_idx_type n_arg,
+EigsRealNonSymmetricFunc (EigsFunc fcn, octave_idx_type n_arg,
                           const std::string& _typ, double sigmar,
                           octave_idx_type k_arg, octave_idx_type p_arg,
                           octave_idx_type& info, ComplexMatrix& eig_vec,
@@ -2701,7 +2701,7 @@
                     mtmp(i, 0) = workd[i + iptr(0) - 1];
 
                   mtmp = utsolve (bt, permB, mtmp);
-                  ColumnVector y = fun (mtmp, err);
+                  ColumnVector y = fcn (mtmp, err);
 
                   if (err)
                     return false;
@@ -2724,7 +2724,7 @@
                       for (F77_INT i = 0; i < n; i++)
                         x(i) = dtmp[i];
 
-                      ColumnVector y = fun (x, err);
+                      ColumnVector y = fcn (x, err);
 
                       if (err)
                         return false;
@@ -2743,7 +2743,7 @@
                       for (F77_INT i = 0; i < n; i++)
                         x(i) = *ip2++;
 
-                      ColumnVector y = fun (x, err);
+                      ColumnVector y = fcn (x, err);
 
                       if (err)
                         return false;
@@ -2762,7 +2762,7 @@
               for (F77_INT i = 0; i < n; i++)
                 x(i) = *ip2++;
 
-              ColumnVector y = fun (x, err);
+              ColumnVector y = fcn (x, err);
 
               if (err)
                 return false;
@@ -3550,7 +3550,7 @@
 
 template <typename M>
 octave_idx_type
-EigsComplexNonSymmetricFunc (EigsComplexFunc fun, octave_idx_type n_arg,
+EigsComplexNonSymmetricFunc (EigsComplexFunc fcn, octave_idx_type n_arg,
                              const std::string& _typ, Complex sigma,
                              octave_idx_type k_arg, octave_idx_type p_arg,
                              octave_idx_type& info, ComplexMatrix& eig_vec,
@@ -3770,7 +3770,7 @@
                     mtmp(i, 0) = workd[i + iptr(0) - 1];
 
                   mtmp = utsolve (bt, permB, mtmp);
-                  ComplexColumnVector y = fun (mtmp, err);
+                  ComplexColumnVector y = fcn (mtmp, err);
 
                   if (err)
                     return false;
@@ -3793,7 +3793,7 @@
                       for (F77_INT i = 0; i < n; i++)
                         x(i) = ctmp[i];
 
-                      ComplexColumnVector y = fun (x, err);
+                      ComplexColumnVector y = fcn (x, err);
 
                       if (err)
                         return false;
@@ -3812,7 +3812,7 @@
                       for (F77_INT i = 0; i < n; i++)
                         x(i) = *ip2++;
 
-                      ComplexColumnVector y = fun (x, err);
+                      ComplexColumnVector y = fcn (x, err);
 
                       if (err)
                         return false;
@@ -3831,7 +3831,7 @@
               for (F77_INT i = 0; i < n; i++)
                 x(i) = *ip2++;
 
-              ComplexColumnVector y = fun (x, err);
+              ComplexColumnVector y = fcn (x, err);
 
               if (err)
                 return false;
@@ -3965,7 +3965,7 @@
 template
 OCTAVE_API octave_idx_type
 EigsRealSymmetricFunc<Matrix>
-(EigsFunc fun, octave_idx_type n, const std::string& _typ, double sigma,
+(EigsFunc fcn, octave_idx_type n, const std::string& _typ, double sigma,
    octave_idx_type k, octave_idx_type p, octave_idx_type& info,
    Matrix& eig_vec, ColumnVector& eig_val, const Matrix& _b,
    ColumnVector& permB, ColumnVector& resid, std::ostream& os, double tol,
@@ -3992,7 +3992,7 @@
 template
 OCTAVE_API octave_idx_type
 EigsRealNonSymmetricFunc<Matrix>
-(EigsFunc fun, octave_idx_type n, const std::string& _typ, double sigmar,
+(EigsFunc fcn, octave_idx_type n, const std::string& _typ, double sigmar,
    octave_idx_type k, octave_idx_type p, octave_idx_type& info,
    ComplexMatrix& eig_vec, ComplexColumnVector& eig_val, const Matrix& _b,
    ColumnVector& permB, ColumnVector& resid, std::ostream& os, double tol,
@@ -4021,7 +4021,7 @@
 template
 OCTAVE_API octave_idx_type
 EigsRealSymmetricFunc<SparseMatrix>
-(EigsFunc fun, octave_idx_type n, const std::string& _typ, double sigma,
+(EigsFunc fcn, octave_idx_type n, const std::string& _typ, double sigma,
    octave_idx_type k, octave_idx_type p, octave_idx_type& info,
    Matrix& eig_vec, ColumnVector& eig_val, const SparseMatrix& _b,
    ColumnVector& permB, ColumnVector& resid, std::ostream& os, double tol,
@@ -4048,7 +4048,7 @@
 template
 OCTAVE_API octave_idx_type
 EigsRealNonSymmetricFunc<SparseMatrix>
-(EigsFunc fun, octave_idx_type n, const std::string& _typ, double sigmar,
+(EigsFunc fcn, octave_idx_type n, const std::string& _typ, double sigmar,
    octave_idx_type k, octave_idx_type p, octave_idx_type& info,
    ComplexMatrix& eig_vec, ComplexColumnVector& eig_val,
    const SparseMatrix& _b, ColumnVector& permB, ColumnVector& resid,
@@ -4077,7 +4077,7 @@
 template
 OCTAVE_API octave_idx_type
 EigsComplexNonSymmetricFunc<ComplexMatrix>
-(EigsComplexFunc fun, octave_idx_type n, const std::string& _typ, Complex sigma,
+(EigsComplexFunc fcn, octave_idx_type n, const std::string& _typ, Complex sigma,
    octave_idx_type k, octave_idx_type p, octave_idx_type& info,
    ComplexMatrix& eig_vec, ComplexColumnVector& eig_val,
    const ComplexMatrix& _b, ColumnVector& permB, ComplexColumnVector& cresid,
@@ -4106,7 +4106,7 @@
 template
 OCTAVE_API octave_idx_type
 EigsComplexNonSymmetricFunc<SparseComplexMatrix>
-(EigsComplexFunc fun, octave_idx_type n, const std::string& _typ, Complex sigma,
+(EigsComplexFunc fcn, octave_idx_type n, const std::string& _typ, Complex sigma,
    octave_idx_type k, octave_idx_type p, octave_idx_type& info,
    ComplexMatrix& eig_vec, ComplexColumnVector& eig_val,
    const SparseComplexMatrix& _b, ColumnVector& permB,
--- a/liboctave/numeric/eigs-base.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/liboctave/numeric/eigs-base.h	Mon Aug 29 13:58:00 2022 +0200
@@ -64,7 +64,7 @@
 
 template <typename M>
 OCTAVE_API octave_idx_type
-EigsRealSymmetricFunc (EigsFunc fun, octave_idx_type n,
+EigsRealSymmetricFunc (EigsFunc fcn, octave_idx_type n,
                        const std::string& _typ, double sigma,
                        octave_idx_type k, octave_idx_type p,
                        octave_idx_type& info, Matrix& eig_vec,
@@ -96,7 +96,7 @@
 
 template <typename M>
 OCTAVE_API octave_idx_type
-EigsRealNonSymmetricFunc (EigsFunc fun, octave_idx_type n,
+EigsRealNonSymmetricFunc (EigsFunc fcn, octave_idx_type n,
                           const std::string& _typ, double sigmar,
                           octave_idx_type k, octave_idx_type p,
                           octave_idx_type& info, ComplexMatrix& eig_vec,
@@ -130,7 +130,7 @@
 
 template <typename M>
 OCTAVE_API octave_idx_type
-EigsComplexNonSymmetricFunc (EigsComplexFunc fun, octave_idx_type n,
+EigsComplexNonSymmetricFunc (EigsComplexFunc fcn, octave_idx_type n,
                              const std::string& _typ, Complex sigma,
                              octave_idx_type k, octave_idx_type p,
                              octave_idx_type& info, ComplexMatrix& eig_vec,
--- a/liboctave/numeric/lo-specfun.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/liboctave/numeric/lo-specfun.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -138,24 +138,12 @@
 
       F77_INT id = (deriv ? 1 : 0);
       F77_INT nz, t_ierr;
+      F77_INT sc = (scaled ? 2 : 1);
 
-      F77_FUNC (zairy, ZAIRY) (zr, zi, id, 2, ar, ai, nz, t_ierr);
+      F77_FUNC (zairy, ZAIRY) (zr, zi, id, sc, ar, ai, nz, t_ierr);
 
       ierr = t_ierr;
 
-      if (! scaled)
-        {
-          Complex expz = exp (- 2.0 / 3.0 * z * sqrt (z));
-
-          double rexpz = expz.real ();
-          double iexpz = expz.imag ();
-
-          double tmp = ar*rexpz - ai*iexpz;
-
-          ai = ar*iexpz + ai*rexpz;
-          ar = tmp;
-        }
-
       if (zi == 0.0 && (! scaled || zr >= 0.0))
         ai = 0.0;
 
@@ -204,8 +192,9 @@
 
       F77_INT id = (deriv ? 1 : 0);
       F77_INT nz, t_ierr;
+      F77_INT sc = (scaled ? 2 : 1);
 
-      F77_FUNC (cairy, CAIRY) (F77_CONST_CMPLX_ARG (&z), id, 2,
+      F77_FUNC (cairy, CAIRY) (F77_CONST_CMPLX_ARG (&z), id, sc,
                                F77_CMPLX_ARG (&a), nz, t_ierr);
 
       ierr = t_ierr;
@@ -213,19 +202,6 @@
       float ar = a.real ();
       float ai = a.imag ();
 
-      if (! scaled)
-        {
-          FloatComplex expz = exp (- 2.0f / 3.0f * z * sqrt (z));
-
-          float rexpz = expz.real ();
-          float iexpz = expz.imag ();
-
-          float tmp = ar*rexpz - ai*iexpz;
-
-          ai = ar*iexpz + ai*rexpz;
-          ar = tmp;
-        }
-
       if (z.imag () == 0.0 && (! scaled || z.real () >= 0.0))
         ai = 0.0;
 
@@ -1384,24 +1360,12 @@
 
       F77_INT id = (deriv ? 1 : 0);
       F77_INT t_ierr;
+      F77_INT sc = (scaled ? 2 : 1);
 
-      F77_FUNC (zbiry, ZBIRY) (zr, zi, id, 2, ar, ai, t_ierr);
+      F77_FUNC (zbiry, ZBIRY) (zr, zi, id, sc, ar, ai, t_ierr);
 
       ierr = t_ierr;
 
-      if (! scaled)
-        {
-          Complex expz = exp (std::abs (std::real (2.0 / 3.0 * z * sqrt (z))));
-
-          double rexpz = expz.real ();
-          double iexpz = expz.imag ();
-
-          double tmp = ar*rexpz - ai*iexpz;
-
-          ai = ar*iexpz + ai*rexpz;
-          ar = tmp;
-        }
-
       if (zi == 0.0 && (! scaled || zr >= 0.0))
         ai = 0.0;
 
@@ -1450,8 +1414,9 @@
 
       F77_INT id = (deriv ? 1 : 0);
       F77_INT t_ierr;
+      F77_INT sc = (scaled ? 2 : 1);
 
-      F77_FUNC (cbiry, CBIRY) (F77_CONST_CMPLX_ARG (&z), id, 2,
+      F77_FUNC (cbiry, CBIRY) (F77_CONST_CMPLX_ARG (&z), id, sc,
                                F77_CMPLX_ARG (&a), t_ierr);
 
       ierr = t_ierr;
@@ -1459,20 +1424,6 @@
       float ar = a.real ();
       float ai = a.imag ();
 
-      if (! scaled)
-        {
-          FloatComplex expz
-            = exp (std::abs (std::real (2.0f / 3.0f * z * sqrt (z))));
-
-          float rexpz = expz.real ();
-          float iexpz = expz.imag ();
-
-          float tmp = ar*rexpz - ai*iexpz;
-
-          ai = ar*iexpz + ai*rexpz;
-          ar = tmp;
-        }
-
       if (z.imag () == 0.0 && (! scaled || z.real () >= 0.0))
         ai = 0.0;
 
--- a/liboctave/numeric/oct-fftw.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/liboctave/numeric/oct-fftw.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -80,11 +80,16 @@
     if (! init_ret)
       (*current_liboctave_error_handler) ("Error initializing FFTW threads");
 
-    // Use number of processors available to the current process
-    // This can be later changed with fftw ("threads", nthreads).
+    // Check number of processors available to the current process
     m_nthreads =
       octave_num_processors_wrapper (OCTAVE_NPROC_CURRENT_OVERRIDABLE);
 
+    // Limit number of threads to 3 by default
+    // See: https://octave.discourse.group/t/3121
+    // This can be later changed with fftw ("threads", nthreads).
+    if (m_nthreads > 3)
+      m_nthreads = 3;
+
     fftw_plan_with_nthreads (m_nthreads);
 #endif
 
--- a/liboctave/numeric/oct-norm.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/liboctave/numeric/oct-norm.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -320,28 +320,28 @@
   }
 
   // now the dispatchers
-#define DEFINE_DISPATCHER(FUNC_NAME, ARG_TYPE, RES_TYPE)        \
+#define DEFINE_DISPATCHER(FCN_NAME, ARG_TYPE, RES_TYPE)         \
   template <typename T, typename R>                             \
-  RES_TYPE FUNC_NAME (const ARG_TYPE& v, R p)                   \
+  RES_TYPE FCN_NAME (const ARG_TYPE& v, R p)                    \
   {                                                             \
     RES_TYPE res;                                               \
     if (p == 2)                                                 \
-      FUNC_NAME (v, res, norm_accumulator_2<R> ());             \
+      FCN_NAME (v, res, norm_accumulator_2<R> ());              \
     else if (p == 1)                                            \
-      FUNC_NAME (v, res, norm_accumulator_1<R> ());             \
+      FCN_NAME (v, res, norm_accumulator_1<R> ());              \
     else if (lo_ieee_isinf (p))                                 \
       {                                                         \
         if (p > 0)                                              \
-          FUNC_NAME (v, res, norm_accumulator_inf<R> ());       \
+          FCN_NAME (v, res, norm_accumulator_inf<R> ());        \
         else                                                    \
-          FUNC_NAME (v, res, norm_accumulator_minf<R> ());      \
+          FCN_NAME (v, res, norm_accumulator_minf<R> ());       \
       }                                                         \
     else if (p == 0)                                            \
-      FUNC_NAME (v, res, norm_accumulator_0<R> ());             \
+      FCN_NAME (v, res, norm_accumulator_0<R> ());              \
     else if (p > 0)                                             \
-      FUNC_NAME (v, res, norm_accumulator_p<R> (p));            \
+      FCN_NAME (v, res, norm_accumulator_p<R> (p));             \
     else                                                        \
-      FUNC_NAME (v, res, norm_accumulator_mp<R> (p));           \
+      FCN_NAME (v, res, norm_accumulator_mp<R> (p));            \
     return res;                                                 \
   }
 
@@ -564,7 +564,7 @@
 
   // and finally, here's what we've promised in the header file
 
-#define DEFINE_XNORM_FUNCS(PREFIX, RTYPE)                               \
+#define DEFINE_XNORM_FCNS(PREFIX, RTYPE)                                \
   RTYPE xnorm (const PREFIX##ColumnVector& x, RTYPE p)                  \
   {                                                                     \
     return vector_norm (x, p);                                          \
@@ -582,10 +582,10 @@
     return vector_norm (x, static_cast<RTYPE> (2));                     \
   }
 
-  DEFINE_XNORM_FUNCS(, double)
-  DEFINE_XNORM_FUNCS(Complex, double)
-  DEFINE_XNORM_FUNCS(Float, float)
-  DEFINE_XNORM_FUNCS(FloatComplex, float)
+  DEFINE_XNORM_FCNS(, double)
+  DEFINE_XNORM_FCNS(Complex, double)
+  DEFINE_XNORM_FCNS(Float, float)
+  DEFINE_XNORM_FCNS(FloatComplex, float)
 
   // this is needed to avoid copying the sparse matrix for xfrobnorm
   template <typename T, typename R>
@@ -598,7 +598,7 @@
     res = acc;
   }
 
-#define DEFINE_XNORM_SPARSE_FUNCS(PREFIX, RTYPE)                \
+#define DEFINE_XNORM_SPARSE_FCNS(PREFIX, RTYPE)                 \
   RTYPE xnorm (const Sparse##PREFIX##Matrix& x, RTYPE p)        \
   {                                                             \
     return matrix_norm (x, p, PREFIX##Matrix ());               \
@@ -610,10 +610,10 @@
     return res;                                                 \
   }
 
-  DEFINE_XNORM_SPARSE_FUNCS(, double)
-  DEFINE_XNORM_SPARSE_FUNCS(Complex, double)
+  DEFINE_XNORM_SPARSE_FCNS(, double)
+  DEFINE_XNORM_SPARSE_FCNS(Complex, double)
 
-#define DEFINE_COLROW_NORM_FUNCS(PREFIX, RPREFIX, RTYPE)        \
+#define DEFINE_COLROW_NORM_FCNS(PREFIX, RPREFIX, RTYPE)         \
   RPREFIX##RowVector                                            \
   xcolnorms (const PREFIX##Matrix& m, RTYPE p)                  \
   {                                                             \
@@ -625,11 +625,11 @@
     return row_norms (m, p);                                    \
   }                                                             \
 
-  DEFINE_COLROW_NORM_FUNCS(, , double)
-  DEFINE_COLROW_NORM_FUNCS(Complex, , double)
-  DEFINE_COLROW_NORM_FUNCS(Float, Float, float)
-  DEFINE_COLROW_NORM_FUNCS(FloatComplex, Float, float)
+  DEFINE_COLROW_NORM_FCNS(, , double)
+  DEFINE_COLROW_NORM_FCNS(Complex, , double)
+  DEFINE_COLROW_NORM_FCNS(Float, Float, float)
+  DEFINE_COLROW_NORM_FCNS(FloatComplex, Float, float)
 
-  DEFINE_COLROW_NORM_FUNCS(Sparse, , double)
-  DEFINE_COLROW_NORM_FUNCS(SparseComplex, , double)
+  DEFINE_COLROW_NORM_FCNS(Sparse, , double)
+  DEFINE_COLROW_NORM_FCNS(SparseComplex, , double)
 }
--- a/liboctave/operators/mx-inlines.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/liboctave/operators/mx-inlines.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -441,18 +441,18 @@
 
 // Arbitrary function appliers.
 // The function is a template parameter to enable inlining.
-template <typename R, typename X, R fun (X x)>
+template <typename R, typename X, R fcn (X x)>
 inline void mx_inline_map (std::size_t n, R *r, const X *x)
 {
   for (std::size_t i = 0; i < n; i++)
-    r[i] = fun (x[i]);
+    r[i] = fcn (x[i]);
 }
 
-template <typename R, typename X, R fun (const X& x)>
+template <typename R, typename X, R fcn (const X& x)>
 inline void mx_inline_map (std::size_t n, R *r, const X *x)
 {
   for (std::size_t i = 0; i < n; i++)
-    r[i] = fun (x[i]);
+    r[i] = fcn (x[i]);
 }
 
 // Appliers.  Since these call the operation just once, we pass it as
@@ -470,18 +470,18 @@
 
 // Shortcuts for applying mx_inline_map.
 
-template <typename R, typename X, R fun (X)>
+template <typename R, typename X, R fcn (X)>
 inline Array<R>
 do_mx_unary_map (const Array<X>& x)
 {
-  return do_mx_unary_op<R, X> (x, mx_inline_map<R, X, fun>);
+  return do_mx_unary_op<R, X> (x, mx_inline_map<R, X, fcn>);
 }
 
-template <typename R, typename X, R fun (const X&)>
+template <typename R, typename X, R fcn (const X&)>
 inline Array<R>
 do_mx_unary_map (const Array<X>& x)
 {
-  return do_mx_unary_op<R, X> (x, mx_inline_map<R, X, fun>);
+  return do_mx_unary_op<R, X> (x, mx_inline_map<R, X, fcn>);
 }
 
 template <typename R>
--- a/liboctave/system/lo-sysdep.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/liboctave/system/lo-sysdep.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -382,6 +382,30 @@
 #endif
     }
 
+    std::FILE *
+    fopen_tmp (const std::string& name, const std::string& mode)
+    {
+#if defined (OCTAVE_USE_WINDOWS_API)
+
+      // Append "D" to the mode string to indicate that this is a temporary
+      // file that should be deleted when the last open handle is closed.
+      std::string tmp_mode = mode + "D";
+
+      return std::fopen (name.c_str (), tmp_mode.c_str ());
+
+#else
+
+      std::FILE *fptr = std::fopen (name.c_str (), mode.c_str ());
+
+      // From gnulib: This relies on the Unix semantics that a file is not
+      // really removed until it is closed.
+      octave_unlink_wrapper (name.c_str ());
+
+      return fptr;
+
+#endif
+    }
+
     std::fstream
     fstream (const std::string& filename, const std::ios::openmode mode)
     {
@@ -699,17 +723,19 @@
         = (oct_ascii_dir + file_ops::dir_sep_str ()
            + crypto::hash ("SHA1", orig_file_name));
 
+      // FIXME: This is just to check if the file exists.  Use a more efficient
+      // method.
       std::string abs_filename_hash = canonicalize_file_name (filename_hash);
 
       if (! abs_filename_hash.empty ())
         sys::unlink (filename_hash);
 
-      wchar_t w_filename_hash[filename_hash.length ()+1] = {0};
+      // At this point, we know that we have only ASCII characters.
+      // So instead of converting, just copy the characters to std::wstring.
+      std::wstring w_filename_hash (filename_hash.begin (),
+                                    filename_hash.end ());
 
-      for (std::size_t i=0; i < filename_hash.length (); i++)
-        w_filename_hash[i] = filename_hash.at (i);
-
-      if (CreateHardLinkW (w_filename_hash, w_orig_file_name, nullptr))
+      if (CreateHardLinkW (w_filename_hash.c_str (), w_orig_file_name, nullptr))
         return filename_hash;
 
 #else
--- a/liboctave/system/lo-sysdep.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/liboctave/system/lo-sysdep.h	Mon Aug 29 13:58:00 2022 +0200
@@ -54,6 +54,9 @@
     extern OCTAVE_API std::FILE *
     fopen (const std::string& name, const std::string& mode);
 
+    extern OCTAVE_API std::FILE *
+    fopen_tmp (const std::string& name, const std::string& mode);
+
     extern OCTAVE_API std::fstream
     fstream (const std::string& name,
              const std::ios::openmode mode = std::ios::in | std::ios::out);
--- a/liboctave/system/oct-env.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/liboctave/system/oct-env.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -207,11 +207,12 @@
     std::string
     env::do_get_temp_directory (void) const
     {
-      std::string tempd;
+      std::string tempd = do_getenv ("TMPDIR");
 
 #if defined (__MINGW32__) || defined (_MSC_VER)
 
-      tempd = do_getenv ("TEMP");
+      if (tempd.empty ())
+        tempd = do_getenv ("TEMP");
 
       if (tempd.empty ())
         tempd = do_getenv ("TMP");
@@ -228,7 +229,8 @@
 
 #else
 
-      tempd = do_getenv ("TMP");
+      if (tempd.empty ())
+        tempd = do_getenv ("TMP");
 
 #if defined (P_tmpdir)
       if (tempd.empty ())
--- a/liboctave/util/f2c-main.c	Sun Aug 28 22:44:49 2022 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,41 +0,0 @@
-////////////////////////////////////////////////////////////////////////
-//
-// Copyright (C) 1996-2022 The Octave Project Developers
-//
-// See the file COPYRIGHT.md in the top-level directory of this
-// distribution or <https://octave.org/copyright/>.
-//
-// This file is part of Octave.
-//
-// Octave is free software: you can redistribute it and/or modify it
-// under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// Octave is distributed in the hope that it will be useful, but
-// WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with Octave; see the file COPYING.  If not, see
-// <https://www.gnu.org/licenses/>.
-//
-////////////////////////////////////////////////////////////////////////
-
-#if defined (HAVE_CONFIG_H)
-#  include "config.h"
-#endif
-
-#include <assert.h>
-
-/* Dummy Fortran main declaration, needed in order to link to some
-   Fortran libraries.  See the AC_F77_DUMMY_MAIN macro documentation.
-   This function should never be called. */
-
-#if defined (F77_DUMMY_MAIN)
-#  if defined (__cplusplus)
-extern "C"
-#  endif
-int F77_DUMMY_MAIN () { assert (0); return 1; }
-#endif
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/liboctave/util/f77-dummy-main.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -0,0 +1,47 @@
+////////////////////////////////////////////////////////////////////////
+//
+// Copyright (C) 1996-2022 The Octave Project Developers
+//
+// See the file COPYRIGHT.md in the top-level directory of this
+// distribution or <https://octave.org/copyright/>.
+//
+// This file is part of Octave.
+//
+// Octave is free software: you can redistribute it and/or modify it
+// under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Octave is distributed in the hope that it will be useful, but
+// WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Octave; see the file COPYING.  If not, see
+// <https://www.gnu.org/licenses/>.
+//
+////////////////////////////////////////////////////////////////////////
+
+#if defined (HAVE_CONFIG_H)
+#  include "config.h"
+#endif
+
+#include <cassert>
+
+// Dummy Fortran main declaration, needed in order to link to some
+// Fortran libraries.  See the AC_F77_DUMMY_MAIN macro documentation.
+// This function should never be called.
+
+#if defined (F77_DUMMY_MAIN)
+
+extern "C"
+int
+F77_DUMMY_MAIN (void)
+{
+  assert (0);
+
+  return 1;
+}
+
+#endif
--- a/liboctave/util/lo-array-errwarn.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/liboctave/util/lo-array-errwarn.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -301,21 +301,6 @@
            "matrix singular to machine precision, rcond = %g", rcond);
       }
   }
-
-  // DEPRECATED in Octave 6.
-
-  // Complain of an index that is out of range, but we don't know matrix size
-  void
-  err_index_out_of_range (int nd, int dim, octave_idx_type idx,
-                          octave_idx_type ext)
-  {
-    // The dim_vector setting here doesn't really make sense.  However,
-    // this function has been deprecated and will be removed in version
-    // 8, so there's no need to attempt to fix it.
-
-    throw out_of_range (std::to_string (idx), nd, dim, ext,
-                        dim_vector (1, 1, 1, 1, 1, 1, 1));
-  }
 }
 
 /* Tests in test/index.tst */
--- a/liboctave/util/lo-array-errwarn.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/liboctave/util/lo-array-errwarn.h	Mon Aug 29 13:58:00 2022 +0200
@@ -131,13 +131,6 @@
   err_index_out_of_range (int ndims, int dim, octave_idx_type idx,
                           octave_idx_type ext, const dim_vector& dv);
 
-#if defined (OCTAVE_PROVIDE_DEPRECATED_SYMBOLS)
-  OCTAVE_DEPRECATED (6, "use err_index_out_of_range (int, int, octave_idx_type, octave_idx_type, const dim_vector&) instead")
-  OCTAVE_NORETURN extern OCTAVE_API void
-  err_index_out_of_range (int ndims, int dim, octave_idx_type idx,
-                          octave_idx_type ext);
-#endif
-
   OCTAVE_NORETURN extern OCTAVE_API void
   err_del_index_out_of_range (bool is1d, octave_idx_type iext,
                               octave_idx_type ext);
--- a/liboctave/util/lo-cutils.c	Sun Aug 28 22:44:49 2022 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,52 +0,0 @@
-////////////////////////////////////////////////////////////////////////
-//
-// Copyright (C) 2000-2022 The Octave Project Developers
-//
-// See the file COPYRIGHT.md in the top-level directory of this
-// distribution or <https://octave.org/copyright/>.
-//
-// This file is part of Octave.
-//
-// Octave is free software: you can redistribute it and/or modify it
-// under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// Octave is distributed in the hope that it will be useful, but
-// WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with Octave; see the file COPYING.  If not, see
-// <https://www.gnu.org/licenses/>.
-//
-////////////////////////////////////////////////////////////////////////
-
-#if defined (HAVE_CONFIG_H)
-#  include "config.h"
-#endif
-
-#include <stdlib.h>
-#include <string.h>
-
-#include "lo-cutils.h"
-
-OCTAVE_API void
-octave_qsort (void *base, size_t n, size_t size,
-              int (*cmp) (const void *, const void *))
-{
-  qsort (base, n, size, cmp);
-}
-
-OCTAVE_API int
-octave_strcasecmp (const char *s1, const char *s2)
-{
-  return strcasecmp (s1, s2);
-}
-
-OCTAVE_API int
-octave_strncasecmp (const char *s1, const char *s2, size_t n)
-{
-  return strncasecmp (s1, s2, n);
-}
--- a/liboctave/util/lo-cutils.h	Sun Aug 28 22:44:49 2022 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,53 +0,0 @@
-////////////////////////////////////////////////////////////////////////
-//
-// Copyright (C) 2012-2022 The Octave Project Developers
-//
-// See the file COPYRIGHT.md in the top-level directory of this
-// distribution or <https://octave.org/copyright/>.
-//
-// This file is part of Octave.
-//
-// Octave is free software: you can redistribute it and/or modify it
-// under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// Octave is distributed in the hope that it will be useful, but
-// WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with Octave; see the file COPYING.  If not, see
-// <https://www.gnu.org/licenses/>.
-//
-////////////////////////////////////////////////////////////////////////
-
-#if ! defined (octave_lo_cutils_h)
-#define octave_lo_cutils_h 1
-
-#include "octave-config.h"
-
-#if defined (__cplusplus)
-#include <cstddef>
-using std::size_t;
-extern "C" {
-#else
-#include <stddef.h>
-#endif
-
-OCTAVE_API void
-octave_qsort (void *base, size_t n, size_t size,
-              int (*cmp) (const void *, const void *));
-
-OCTAVE_API int
-octave_strcasecmp (const char *s1, const char *s2);
-
-OCTAVE_API int
-octave_strncasecmp (const char *s1, const char *s2, size_t n);
-
-#if defined (__cplusplus)
-}
-#endif
-
-#endif
--- a/liboctave/util/lo-regexp.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/liboctave/util/lo-regexp.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -83,11 +83,15 @@
 
     while ((new_pos = m_pattern.find ("(?", pos)) != std::string::npos)
       {
+        std::size_t tmp_pos;
         if (m_pattern.size () > new_pos + 2
             && m_pattern.at (new_pos + 2) == '<'
             && ! (m_pattern.size () > new_pos + 3
                   && (m_pattern.at (new_pos + 3) == '='
-                      || m_pattern.at (new_pos + 3) == '!')))
+                      || m_pattern.at (new_pos + 3) == '!'))
+            && (tmp_pos = m_pattern.find_first_of ('>', new_pos))
+               != std::string::npos
+            && m_pattern.find_first_of (')', tmp_pos) != std::string::npos)
           {
             // The syntax of named tokens in pcre is "(?P<name>...)" while
             // we need a syntax "(?<name>...)", so fix that here.  Also an
@@ -98,12 +102,6 @@
             // that here by replacing name tokens by dummy names, and dealing
             // with the dummy names later.
 
-            std::size_t tmp_pos = m_pattern.find_first_of ('>', new_pos);
-
-            if (tmp_pos == std::string::npos)
-              (*current_liboctave_error_handler)
-                ("regexp: syntax error in pattern");
-
             std::string tmp_name
               = m_pattern.substr (new_pos+3, tmp_pos-new_pos-3);
 
--- a/liboctave/util/lo-utils.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/liboctave/util/lo-utils.h	Mon Aug 29 13:58:00 2022 +0200
@@ -33,7 +33,6 @@
 #include <iosfwd>
 #include <string>
 
-#include "lo-cutils.h"
 #include "oct-cmplx.h"
 #include "quit.h"
 
--- a/liboctave/util/module.mk	Sun Aug 28 22:44:49 2022 +0200
+++ b/liboctave/util/module.mk	Mon Aug 29 13:58:00 2022 +0200
@@ -9,7 +9,6 @@
   %reldir%/file-info.h \
   %reldir%/glob-match.h \
   %reldir%/lo-array-errwarn.h \
-  %reldir%/lo-cutils.h \
   %reldir%/lo-hash.h \
   %reldir%/lo-ieee.h \
   %reldir%/lo-regexp.h \
@@ -51,8 +50,6 @@
   %reldir%/r1mach.f
 
 UTIL_C_SRC = \
-  %reldir%/f2c-main.c \
-  %reldir%/lo-cutils.c \
   %reldir%/blaswrap.c \
   %reldir%/f77-fcn.c \
   %reldir%/lo-error.c \
@@ -64,6 +61,7 @@
   %reldir%/cmd-edit.cc \
   %reldir%/cmd-hist.cc \
   %reldir%/data-conv.cc \
+  %reldir%/f77-dummy-main.cc \
   %reldir%/file-info.cc \
   %reldir%/glob-match.cc \
   %reldir%/kpse.cc \
@@ -75,6 +73,7 @@
   %reldir%/quit.cc \
   %reldir%/oct-atomic.c \
   %reldir%/oct-base64.cc \
+  %reldir%/oct-cmplx.cc \
   %reldir%/oct-glob.cc \
   %reldir%/oct-inttypes.cc \
   %reldir%/oct-mutex.cc \
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/liboctave/util/oct-cmplx.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -0,0 +1,201 @@
+////////////////////////////////////////////////////////////////////////
+//
+// Copyright (C) 1995-2022 The Octave Project Developers
+//
+// See the file COPYRIGHT.md in the top-level directory of this
+// distribution or <https://octave.org/copyright/>.
+//
+// This file is part of Octave.
+//
+// Octave is free software: you can redistribute it and/or modify it
+// under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Octave is distributed in the hope that it will be useful, but
+// WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Octave; see the file COPYING.  If not, see
+// <https://www.gnu.org/licenses/>.
+//
+////////////////////////////////////////////////////////////////////////
+
+#if defined (HAVE_CONFIG_H)
+#  include "config.h"
+#endif
+
+#include <complex>
+
+// For complex-complex and complex-real comparisons, Octave uses the following
+// ordering: compare absolute values first; if they match, compare phase
+// angles.  This is partially inconsistent with M*b, which compares complex
+// numbers only by their real parts; OTOH, it uses the same definition for
+// max/min and sort.  The abs/arg comparison is definitely more useful (the
+// other one is emulated rather trivially), so let's be consistent and use that
+// all over.
+
+// The standard C library function arg() returns [-pi,pi], which creates a
+// non-unique representation for numbers along the negative real axis branch
+// cut.  Change this to principal value (-pi,pi] by mapping -pi to pi.
+
+// General templated code for all (double, float) complex operators
+#define DEF_COMPLEXR_COMP(OP, OPS)                                           \
+   template <typename T>                                                     \
+   bool operator OP (const std::complex<T>& a, const std::complex<T>& b)     \
+   {                                                                         \
+     OCTAVE_FLOAT_TRUNCATE const T ax = std::abs (a);                        \
+     OCTAVE_FLOAT_TRUNCATE const T bx = std::abs (b);                        \
+     if (ax == bx)                                                           \
+       {                                                                     \
+         OCTAVE_FLOAT_TRUNCATE const T ay = std::arg (a);                    \
+         OCTAVE_FLOAT_TRUNCATE const T by = std::arg (b);                    \
+         if (ay == static_cast<T> (-M_PI))                                   \
+           {                                                                 \
+             if (by != static_cast<T> (-M_PI))                               \
+               return static_cast<T> (M_PI) OP by;                           \
+           }                                                                 \
+         else if (by == static_cast<T> (-M_PI))                              \
+           {                                                                 \
+             return ay OP static_cast<T> (M_PI);                             \
+           }                                                                 \
+         return ay OP by;                                                    \
+       }                                                                     \
+     else                                                                    \
+       return ax OPS bx;                                                     \
+   }                                                                         \
+   template <typename T>                                                     \
+   bool operator OP (const std::complex<T>& a, T b)                          \
+   {                                                                         \
+     OCTAVE_FLOAT_TRUNCATE const T ax = std::abs (a);                        \
+     OCTAVE_FLOAT_TRUNCATE const T bx = std::abs (b);                        \
+     if (ax == bx)                                                           \
+       {                                                                     \
+         OCTAVE_FLOAT_TRUNCATE const T ay = std::arg (a);                    \
+         if (ay == static_cast<T> (-M_PI))                                   \
+           return static_cast<T> (M_PI) OP 0;                                \
+         return ay OP 0;                                                     \
+       }                                                                     \
+     else                                                                    \
+       return ax OPS bx;                                                     \
+   }                                                                         \
+   template <typename T>                                                     \
+   bool operator OP (T a, const std::complex<T>& b)                          \
+   {                                                                         \
+     OCTAVE_FLOAT_TRUNCATE const T ax = std::abs (a);                        \
+     OCTAVE_FLOAT_TRUNCATE const T bx = std::abs (b);                        \
+     if (ax == bx)                                                           \
+       {                                                                     \
+         OCTAVE_FLOAT_TRUNCATE const T by = std::arg (b);                    \
+         if (by == static_cast<T> (-M_PI))                                   \
+           return 0 OP static_cast<T> (M_PI);                                \
+         return 0 OP by;                                                     \
+       }                                                                     \
+     else                                                                    \
+       return ax OPS bx;                                                     \
+   }
+
+#if defined (__APPLE__)
+   // Apple specializations
+
+   // FIXME: Apple's math library chooses to return a different value for
+   // std::arg with floats than the constant static_cast<float> (M_PI).
+   // Work around this obtuse behavior by providing the constant A_PI which
+   // is Apple's definition of the constant PI for float variables.
+   // The template code for doubles is the same as that for UNIX platforms.
+   // Use C++ template specialization to add specific functions for float
+   // values that make use of A_PI.
+
+   // Apple version of PI in single precision
+#  define A_PI 3.1415925025939941f
+
+#  define INST_SPECIAL_COMPLEXR_COMP(OP, OPS)                                \
+     template <> OCTAVE_API                                                  \
+     bool operator OP<float> (const std::complex<float>& a,                  \
+                              const std::complex<float>& b)                  \
+     {                                                                       \
+       OCTAVE_FLOAT_TRUNCATE const float ax = std::abs (a);                  \
+       OCTAVE_FLOAT_TRUNCATE const float bx = std::abs (b);                  \
+       if (ax == bx)                                                         \
+         {                                                                   \
+           OCTAVE_FLOAT_TRUNCATE const float ay = std::arg (a);              \
+           OCTAVE_FLOAT_TRUNCATE const float by = std::arg (b);              \
+           if (ay == -A_PI)                                                  \
+             {                                                               \
+               if (by != -A_PI)                                              \
+                 return static_cast<float> (M_PI) OP by;                     \
+             }                                                               \
+           else if (by == -A_PI)                                             \
+             {                                                               \
+               return ay OP static_cast<float> (M_PI);                       \
+             }                                                               \
+           return ay OP by;                                                  \
+         }                                                                   \
+       else                                                                  \
+         return ax OPS bx;                                                   \
+     }                                                                       \
+     template <> OCTAVE_API                                                  \
+     bool operator OP<float> (const std::complex<float>& a, float b)         \
+     {                                                                       \
+       OCTAVE_FLOAT_TRUNCATE const float ax = std::abs (a);                  \
+       OCTAVE_FLOAT_TRUNCATE const float bx = std::abs (b);                  \
+       if (ax == bx)                                                         \
+         {                                                                   \
+           OCTAVE_FLOAT_TRUNCATE const float ay = std::arg (a);              \
+           if (ay == -A_PI)                                                  \
+             return static_cast<float> (M_PI) OP 0;                          \
+           return ay OP 0;                                                   \
+         }                                                                   \
+       else                                                                  \
+         return ax OPS bx;                                                   \
+     }                                                                       \
+     template <> OCTAVE_API                                                  \
+     bool operator OP<float> (float a, const std::complex<float>& b)         \
+     {                                                                       \
+       OCTAVE_FLOAT_TRUNCATE const float ax = std::abs (a);                  \
+       OCTAVE_FLOAT_TRUNCATE const float bx = std::abs (b);                  \
+       if (ax == bx)                                                         \
+         {                                                                   \
+           OCTAVE_FLOAT_TRUNCATE const float by = std::arg (b);              \
+           if (by == -A_PI)                                                  \
+             return 0 OP static_cast<float> (M_PI);                          \
+           return 0 OP by;                                                   \
+         }                                                                   \
+       else                                                                  \
+         return ax OPS bx;                                                   \
+     }
+
+#endif
+
+DEF_COMPLEXR_COMP (>, >)
+DEF_COMPLEXR_COMP (<, <)
+DEF_COMPLEXR_COMP (>=, >)
+DEF_COMPLEXR_COMP (<=, <)
+
+
+// Instantiate templates
+
+# define INST_COMPLEXR_COMP(OP, T)                                           \
+    template OCTAVE_API bool operator OP (const std::complex<T>& a,          \
+                                          const std::complex<T>& b);         \
+    template OCTAVE_API bool operator OP (const std::complex<T>& a, T b);    \
+    template OCTAVE_API bool operator OP (T a, const std::complex<T>& b);
+
+INST_COMPLEXR_COMP (>, double)
+INST_COMPLEXR_COMP (<, double)
+INST_COMPLEXR_COMP (>=, double)
+INST_COMPLEXR_COMP (<=, double)
+
+#if defined (__APPLE__)
+INST_SPECIAL_COMPLEXR_COMP (>, >)
+INST_SPECIAL_COMPLEXR_COMP (<, <)
+INST_SPECIAL_COMPLEXR_COMP (>=, >)
+INST_SPECIAL_COMPLEXR_COMP (<=, <)
+#else
+INST_COMPLEXR_COMP (>, float)
+INST_COMPLEXR_COMP (<, float)
+INST_COMPLEXR_COMP (>=, float)
+INST_COMPLEXR_COMP (<=, float)
+#endif
--- a/liboctave/util/oct-cmplx.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/liboctave/util/oct-cmplx.h	Mon Aug 29 13:58:00 2022 +0200
@@ -33,206 +33,34 @@
 typedef std::complex<double> Complex;
 typedef std::complex<float> FloatComplex;
 
-// For complex-complex and complex-real comparisons, Octave uses the following
-// ordering: compare absolute values first; if they match, compare phase
-// angles.  This is partially inconsistent with M*b, which compares complex
-// numbers only by their real parts; OTOH, it uses the same definition for
-// max/min and sort.  The abs/arg comparison is definitely more useful (the
-// other one is emulated rather trivially), so let's be consistent and use that
-// all over.
-
-// The standard C library function arg() returns [-pi,pi], which creates a
-// non-unique representation for numbers along the negative real axis branch
-// cut.  Change this to principal value (-pi,pi] by mapping -pi to pi.
-
-#if ! defined (__APPLE__)
+// template declaration
+# define DECL_COMPLEXR_COMP(OP)                                               \
+    template <typename T> bool operator OP (const std::complex<T>& a,         \
+                                            const std::complex<T>& b);        \
+    template <typename T> bool operator OP (const std::complex<T>& a, T b);   \
+    template <typename T> bool operator OP (T a, const std::complex<T>& b);
 
-   // General templated code for all (double, float) complex operators
-#  define DEF_COMPLEXR_COMP(OP, OPS)                                         \
-     template <typename T>                                                   \
-     inline bool operator OP (const std::complex<T>& a,                      \
-                              const std::complex<T>& b)                      \
-     {                                                                       \
-       OCTAVE_FLOAT_TRUNCATE const T ax = std::abs (a);                      \
-       OCTAVE_FLOAT_TRUNCATE const T bx = std::abs (b);                      \
-       if (ax == bx)                                                         \
-         {                                                                   \
-           OCTAVE_FLOAT_TRUNCATE const T ay = std::arg (a);                  \
-           OCTAVE_FLOAT_TRUNCATE const T by = std::arg (b);                  \
-           if (ay == static_cast<T> (-M_PI))                                 \
-             {                                                               \
-               if (by != static_cast<T> (-M_PI))                             \
-                 return static_cast<T> (M_PI) OP by;                         \
-             }                                                               \
-           else if (by == static_cast<T> (-M_PI))                            \
-             {                                                               \
-               return ay OP static_cast<T> (M_PI);                           \
-             }                                                               \
-           return ay OP by;                                                  \
-         }                                                                   \
-       else                                                                  \
-         return ax OPS bx;                                                   \
-     }                                                                       \
-     template <typename T>                                                   \
-     inline bool operator OP (const std::complex<T>& a, T b)                 \
-     {                                                                       \
-       OCTAVE_FLOAT_TRUNCATE const T ax = std::abs (a);                      \
-       OCTAVE_FLOAT_TRUNCATE const T bx = std::abs (b);                      \
-       if (ax == bx)                                                         \
-         {                                                                   \
-           OCTAVE_FLOAT_TRUNCATE const T ay = std::arg (a);                  \
-           if (ay == static_cast<T> (-M_PI))                                 \
-             return static_cast<T> (M_PI) OP 0;                              \
-           return ay OP 0;                                                   \
-         }                                                                   \
-       else                                                                  \
-         return ax OPS bx;                                                   \
-     }                                                                       \
-     template <typename T>                                                   \
-     inline bool operator OP (T a, const std::complex<T>& b)                 \
-     {                                                                       \
-       OCTAVE_FLOAT_TRUNCATE const T ax = std::abs (a);                      \
-       OCTAVE_FLOAT_TRUNCATE const T bx = std::abs (b);                      \
-       if (ax == bx)                                                         \
-         {                                                                   \
-           OCTAVE_FLOAT_TRUNCATE const T by = std::arg (b);                  \
-           if (by == static_cast<T> (-M_PI))                                 \
-             return 0 OP static_cast<T> (M_PI);                              \
-           return 0 OP by;                                                   \
-         }                                                                   \
-       else                                                                  \
-         return ax OPS bx;                                                   \
-     }
-
-#else
-   // Apple specialization.
-
-   // FIXME: Apple's math library chooses to return a different value for
-   // std::arg with floats than the constant static_cast<float> (M_PI).
-   // Work around this obtuse behavior by providing the constant A_PI which
-   // is Apple's definition of the constant PI for float variables.
-   // The template code for doubles is the same as that for UNIX platforms.
-   // Use C++ template specialization to add specific functions for float
-   // values that make use of A_PI.
-
-   // Apple version of PI
-#  define A_PI 3.1415925025939941f
+DECL_COMPLEXR_COMP(>)
+DECL_COMPLEXR_COMP(<)
+DECL_COMPLEXR_COMP(>=)
+DECL_COMPLEXR_COMP(<=)
 
-#  define DEF_COMPLEXR_COMP(OP, OPS)                                         \
-     template <typename T>                                                   \
-     inline bool operator OP (const std::complex<T>& a,                      \
-                              const std::complex<T>& b)                      \
-     {                                                                       \
-       OCTAVE_FLOAT_TRUNCATE const T ax = std::abs (a);                      \
-       OCTAVE_FLOAT_TRUNCATE const T bx = std::abs (b);                      \
-       if (ax == bx)                                                         \
-         {                                                                   \
-           OCTAVE_FLOAT_TRUNCATE const T ay = std::arg (a);                  \
-           OCTAVE_FLOAT_TRUNCATE const T by = std::arg (b);                  \
-           if (ay == static_cast<T> (-M_PI))                                 \
-             {                                                               \
-               if (by != static_cast<T> (-M_PI))                             \
-                 return static_cast<T> (M_PI) OP by;                         \
-             }                                                               \
-           else if (by == static_cast<T> (-M_PI))                            \
-             {                                                               \
-               return ay OP static_cast<T> (M_PI);                           \
-             }                                                               \
-           return ay OP by;                                                  \
-         }                                                                   \
-       else                                                                  \
-         return ax OPS bx;                                                   \
-     }                                                                       \
-     template <typename T>                                                   \
-     inline bool operator OP (const std::complex<T>& a, T b)                 \
-     {                                                                       \
-       OCTAVE_FLOAT_TRUNCATE const T ax = std::abs (a);                      \
-       OCTAVE_FLOAT_TRUNCATE const T bx = std::abs (b);                      \
-       if (ax == bx)                                                         \
-         {                                                                   \
-           OCTAVE_FLOAT_TRUNCATE const T ay = std::arg (a);                  \
-           if (ay == static_cast<T> (-M_PI))                                 \
-             return static_cast<T> (M_PI) OP 0;                              \
-           return ay OP 0;                                                   \
-         }                                                                   \
-       else                                                                  \
-         return ax OPS bx;                                                   \
-     }                                                                       \
-     template <typename T>                                                   \
-     inline bool operator OP (T a, const std::complex<T>& b)                 \
-     {                                                                       \
-       OCTAVE_FLOAT_TRUNCATE const T ax = std::abs (a);                      \
-       OCTAVE_FLOAT_TRUNCATE const T bx = std::abs (b);                      \
-       if (ax == bx)                                                         \
-         {                                                                   \
-           OCTAVE_FLOAT_TRUNCATE const T by = std::arg (b);                  \
-           if (by == static_cast<T> (-M_PI))                                 \
-             return 0 OP static_cast<T> (M_PI);                              \
-           return 0 OP by;                                                   \
-         }                                                                   \
-       else                                                                  \
-         return ax OPS bx;                                                   \
-     }                                                                       \
-     template <>                                                             \
-     inline bool operator OP<float> (const std::complex<float>& a,           \
-                                     const std::complex<float>& b)           \
-     {                                                                       \
-       OCTAVE_FLOAT_TRUNCATE const float ax = std::abs (a);                  \
-       OCTAVE_FLOAT_TRUNCATE const float bx = std::abs (b);                  \
-       if (ax == bx)                                                         \
-         {                                                                   \
-           OCTAVE_FLOAT_TRUNCATE const float ay = std::arg (a);              \
-           OCTAVE_FLOAT_TRUNCATE const float by = std::arg (b);              \
-           if (ay == -A_PI)                                                  \
-             {                                                               \
-               if (by != -A_PI)                                              \
-                 return static_cast<float> (M_PI) OP by;                     \
-             }                                                               \
-           else if (by == -A_PI)                                             \
-             {                                                               \
-               return ay OP static_cast<float> (M_PI);                       \
-             }                                                               \
-           return ay OP by;                                                  \
-         }                                                                   \
-       else                                                                  \
-         return ax OPS bx;                                                   \
-     }                                                                       \
-     template <>                                                             \
-     inline bool operator OP<float> (const std::complex<float>& a, float b)  \
-     {                                                                       \
-       OCTAVE_FLOAT_TRUNCATE const float ax = std::abs (a);                  \
-       OCTAVE_FLOAT_TRUNCATE const float bx = std::abs (b);                  \
-       if (ax == bx)                                                         \
-         {                                                                   \
-           OCTAVE_FLOAT_TRUNCATE const float ay = std::arg (a);              \
-           if (ay == -A_PI)                                                  \
-             return static_cast<float> (M_PI) OP 0;                          \
-           return ay OP 0;                                                   \
-         }                                                                   \
-       else                                                                  \
-         return ax OPS bx;                                                   \
-     }                                                                       \
-     template <>                                                             \
-     inline bool operator OP<float> (float a, const std::complex<float>& b)  \
-     {                                                                       \
-       OCTAVE_FLOAT_TRUNCATE const float ax = std::abs (a);                  \
-       OCTAVE_FLOAT_TRUNCATE const float bx = std::abs (b);                  \
-       if (ax == bx)                                                         \
-         {                                                                   \
-           OCTAVE_FLOAT_TRUNCATE const float by = std::arg (b);              \
-           if (by == -A_PI)                                                  \
-             return 0 OP static_cast<float> (M_PI);                          \
-           return 0 OP by;                                                   \
-         }                                                                   \
-       else                                                                  \
-         return ax OPS bx;                                                   \
-     }
+// extern template instantiations
+# define EXT_INST_COMPLEXR_COMP(OP, T)                                       \
+    extern template OCTAVE_API                                               \
+    bool operator OP (const std::complex<T>& a, const std::complex<T>& b);   \
+    extern template OCTAVE_API                                               \
+    bool operator OP (const std::complex<T>& a, T b);                        \
+    extern template OCTAVE_API                                               \
+    bool operator OP (T a, const std::complex<T>& b);
+
+EXT_INST_COMPLEXR_COMP(>, double)
+EXT_INST_COMPLEXR_COMP(>, float)
+EXT_INST_COMPLEXR_COMP(<, double)
+EXT_INST_COMPLEXR_COMP(<, float)
+EXT_INST_COMPLEXR_COMP(>=, double)
+EXT_INST_COMPLEXR_COMP(>=, float)
+EXT_INST_COMPLEXR_COMP(<=, double)
+EXT_INST_COMPLEXR_COMP(<=, float)
 
 #endif
-
-DEF_COMPLEXR_COMP (>, >)
-DEF_COMPLEXR_COMP (<, <)
-DEF_COMPLEXR_COMP (<=, <)
-DEF_COMPLEXR_COMP (>=, >)
-
-#endif
--- a/liboctave/util/oct-inttypes.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/liboctave/util/oct-inttypes.h	Mon Aug 29 13:58:00 2022 +0200
@@ -862,6 +862,12 @@
 
 #undef OCTAVE_INT_UN_OP
 
+  octave_int<T> operator ~ (void) const
+  {
+    T bitinv = ~ m_ival;
+    return bitinv;
+  }
+
   // Homogeneous binary integer operations.
 #define OCTAVE_INT_BIN_OP(OP, NAME, ARGT)               \
   inline octave_int<T>                                  \
--- a/liboctave/util/oct-string.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/liboctave/util/oct-string.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -607,6 +607,90 @@
   return num_replacements;
 }
 
+typedef octave::string::codecvt_u8::InternT InternT;
+typedef octave::string::codecvt_u8::ExternT ExternT;
+typedef octave::string::codecvt_u8::StateT StateT;
+
+typename std::codecvt<InternT, ExternT, StateT>::result
+octave::string::codecvt_u8::do_out
+  (StateT& /* state */,
+   const InternT* from, const InternT* from_end, const InternT*& from_next,
+   ExternT* to, ExternT* to_end, ExternT*& to_next) const
+{
+  if (from_end < from)
+    return std::codecvt<InternT, ExternT, StateT>::noconv;
+
+  // Convert from UTF-8 to output encoding
+  std::size_t srclen = (from_end-from) * sizeof (InternT);
+  std::size_t lengthp = (to_end-to) * sizeof (ExternT);
+  const uint8_t *u8_str = reinterpret_cast<const uint8_t *> (from);
+  char *enc_str = octave_u8_conv_to_encoding (m_enc.c_str (), u8_str, srclen,
+                                              &lengthp);
+
+  size_t max = to_end - to;
+  if (lengthp < max)
+    max = lengthp;
+
+  // copy conversion result to output
+  // FIXME: Handle incomplete UTF-8 characters at end of buffer.
+  std::copy_n (enc_str, max, to);
+  ::free (enc_str);
+
+  from_next = from + srclen;
+  to_next = to + max;
+
+  return std::codecvt<InternT, ExternT, StateT>::ok;
+}
+
+typename std::codecvt<InternT, ExternT, StateT>::result
+octave::string::codecvt_u8::do_in
+  (StateT& /* state */,
+   const ExternT* from, const ExternT* from_end, const ExternT*& from_next,
+   InternT* to, InternT* to_end, InternT*& to_next) const
+{
+  // Convert from input encoding to UTF-8
+  std::size_t srclen = (from_end-from) * sizeof (ExternT);
+  std::size_t lengthp = (to_end-to) * sizeof (InternT);
+  const char *enc_str = reinterpret_cast<const char *> (from);
+  uint8_t *u8_str = octave_u8_conv_from_encoding (m_enc.c_str (),
+                                                  enc_str, srclen, &lengthp);
+
+  std::size_t max = to_end - to;
+  if (lengthp < max)
+    max = lengthp;
+
+  // copy conversion result to output
+  std::copy_n (u8_str, max, to);
+  ::free (u8_str);
+
+  from_next = from + srclen;
+  to_next = to + max;
+
+  return std::codecvt<InternT, ExternT, StateT>::ok;
+}
+
+int octave::string::codecvt_u8::do_length
+  (StateT& /* state */, const ExternT *src, const ExternT *end,
+   std::size_t max) const
+{
+  // return number of external characters that produce MAX internal ones
+  std::size_t srclen = end-src;
+  std::size_t offsets[srclen];
+  std::size_t lengthp = max;
+  octave_u8_conv_from_encoding_offsets (m_enc.c_str (), src, srclen, offsets,
+                                        &lengthp);
+  std::size_t ext_char;
+  for (ext_char = 0; ext_char < srclen; ext_char++)
+  {
+    if (offsets[ext_char] != static_cast<size_t> (-1)
+        && offsets[ext_char] >= max)
+      break;
+  }
+
+  return ext_char;
+}
+
+
 template <typename T>
 std::string
 rational_approx (T val, int len)
--- a/liboctave/util/oct-string.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/liboctave/util/oct-string.h	Mon Aug 29 13:58:00 2022 +0200
@@ -28,6 +28,8 @@
 
 #include "octave-config.h"
 
+#include <locale>
+
 #include "oct-cmplx.h"
 
 namespace octave
@@ -155,6 +157,94 @@
     extern OCTAVE_API unsigned int
     u8_validate (const std::string& who, std::string& in_string,
                  const u8_fallback_type type = U8_REPLACEMENT_CHAR);
+
+
+    template<class Facet>
+    struct
+    deletable_facet : Facet
+    {
+      template<class ...Args>
+      deletable_facet (Args&& ...args)
+      : Facet (std::forward<Args> (args)...)
+      { }
+
+      // destructor needs to be public
+      ~deletable_facet () {}
+    };
+
+    class
+    OCTAVE_API
+    codecvt_u8 : public std::codecvt<char, char, std::mbstate_t>
+    {
+    public:
+
+      // No copying!
+
+      codecvt_u8 (codecvt_u8 &) = delete;
+
+      codecvt_u8& operator = (codecvt_u8 &) = delete;
+
+      codecvt_u8 (const std::string &enc)
+      : m_enc (enc)
+      { }
+
+      virtual ~codecvt_u8 () { }
+
+      typedef char InternT;
+      typedef char ExternT;
+      typedef std::mbstate_t StateT;
+
+    private:
+
+      OCTAVE_API
+      typename std::codecvt<InternT, ExternT, StateT>::result
+      do_out (StateT& state,
+              const InternT* from, const InternT* from_end, const InternT*& from_next,
+              ExternT* to, ExternT* to_end, ExternT*& to_next) const;
+
+      OCTAVE_API
+      typename std::codecvt<InternT, ExternT, StateT>::result
+      do_in (StateT& state,
+             const ExternT* from, const ExternT* from_end, const ExternT*& from_next,
+             InternT* to, InternT* to_end, InternT*& to_next) const;
+
+      typename std::codecvt<InternT, ExternT, StateT>::result
+      do_unshift (StateT& /* state */, ExternT* to, ExternT* /* to_end */,
+                  ExternT*& to_next) const
+      {
+        // FIXME: What is the correct thing to unshift?
+        // Just reset?
+        to_next = to;
+
+        return std::codecvt<InternT, ExternT, StateT>::ok;
+      }
+
+      int do_encoding () const throw ()
+      {
+        // return 0 because UTF-8 encoding is variable length
+        return 0;
+      }
+
+      bool do_always_noconv () const throw ()
+      {
+        // return false to indicate non-identity conversion
+        return false;
+      }
+
+      OCTAVE_API int
+      do_length (StateT& state, const ExternT *src, const ExternT *end,
+                 std::size_t max) const;
+
+      int do_max_length() const throw ()
+      {
+        // For UTF-8, a maximum of 4 bytes are needed for one character.
+        return 4;
+      }
+
+      std::string m_enc;
+
+    };
+
   }
 }
 
--- a/liboctave/util/quit.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/liboctave/util/quit.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -37,32 +37,11 @@
 
 sig_atomic_t octave_interrupt_state = 0;
 
-// DEPRECATED in Octave 6.
-// This variable should never have been public.
-sig_atomic_t octave_exception_state = 0;
-// Use this variable internally until the functions that use it can be
-// removed.
-static sig_atomic_t internal_exception_state;
-
 volatile sig_atomic_t octave_signal_caught = 0;
 
 void (*octave_signal_hook) (void) = nullptr;
 void (*octave_interrupt_hook) (void) = nullptr;
 
-// DEPRECATED in Octave 6.
-void (*octave_bad_alloc_hook) (void) = nullptr;
-
-// The octave_exception enum values were DEPRECATED in Octave 6.
-// Use these values internally until the functions that use them can be
-// removed.
-enum octave_internal_exception
-{
-  octave_internal_no_exception = 0,
-  octave_internal_exec_exception = 1,
-  octave_internal_alloc_exception = 3,
-  octave_internal_quit_exception = 4
-};
-
 namespace octave
 {
   std::string execution_exception::stack_trace (void) const
@@ -130,61 +109,3 @@
       throw octave::interrupt_exception ();
     }
 }
-
-// DEPRECATED in Octave 6
-void
-octave_throw_interrupt_exception (void)
-{
-  if (octave_interrupt_hook)
-    octave_interrupt_hook ();
-
-  throw octave::interrupt_exception ();
-}
-
-// DEPRECATED in Octave 6
-void
-octave_throw_execution_exception (void)
-{
-  // FIXME: would a hook function be useful here?
-
-  internal_exception_state = octave_internal_exec_exception;
-
-  throw octave::execution_exception ();
-}
-
-// DEPRECATED in Octave 6
-void
-octave_throw_bad_alloc (void)
-{
-  internal_exception_state = octave_internal_alloc_exception;
-
-  throw std::bad_alloc ();
-}
-
-// DEPRECATED in Octave 6
-void
-octave_rethrow_exception (void)
-{
-  if (octave_interrupt_state)
-    {
-      octave_interrupt_state = -1;
-
-      throw octave::interrupt_exception ();
-    }
-  else
-    {
-      switch (internal_exception_state)
-        {
-        case octave_internal_exec_exception:
-          throw octave::execution_exception ();
-          break;
-
-        case octave_internal_alloc_exception:
-          throw std::bad_alloc ();
-          break;
-
-        default:
-          break;
-        }
-    }
-}
--- a/liboctave/util/quit.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/liboctave/util/quit.h	Mon Aug 29 13:58:00 2022 +0200
@@ -224,29 +224,10 @@
 */
 extern OCTAVE_API sig_atomic_t octave_interrupt_state;
 
-#if defined (OCTAVE_PROVIDE_DEPRECATED_SYMBOLS)
-OCTAVE_DEPRECATED (6, "'octave_exception_state' is an obsolete internal variable; any uses should be removed")
-extern OCTAVE_API sig_atomic_t octave_exception_state;
-#endif
-
 extern OCTAVE_API volatile sig_atomic_t octave_signal_caught;
 
 extern OCTAVE_API void octave_handle_signal (void);
 
-#if defined (OCTAVE_PROVIDE_DEPRECATED_SYMBOLS)
-OCTAVE_DEPRECATED (6, "use 'throw octave::interrupt_exception' instead")
-OCTAVE_NORETURN extern OCTAVE_API void octave_throw_interrupt_exception (void);
-
-OCTAVE_DEPRECATED (6, "use 'throw octave::execution_exception' instead")
-OCTAVE_NORETURN extern OCTAVE_API void octave_throw_execution_exception (void);
-
-OCTAVE_DEPRECATED (6, "use 'throw std::bad_alloc' instead")
-OCTAVE_NORETURN extern OCTAVE_API void octave_throw_bad_alloc (void);
-
-OCTAVE_DEPRECATED (6, "use 'throw' instead")
-extern OCTAVE_API void octave_rethrow_exception (void);
-#endif
-
 #if defined (__cplusplus)
 
 inline void octave_quit (void)
@@ -312,11 +293,6 @@
 extern OCTAVE_API void (*octave_signal_hook) (void);
 extern OCTAVE_API void (*octave_interrupt_hook) (void);
 
-#if defined (OCTAVE_PROVIDE_DEPRECATED_SYMBOLS)
-OCTAVE_DEPRECATED (6, "'octave_bad_alloc_hook' is obsolete and no longer used")
-extern OCTAVE_API void (*octave_bad_alloc_hook) (void);
 #endif
 
 #endif
-
-#endif
--- a/liboctave/util/str-vec.cc	Sun Aug 28 22:44:49 2022 +0200
+++ b/liboctave/util/str-vec.cc	Mon Aug 29 13:58:00 2022 +0200
@@ -244,7 +244,6 @@
   for (octave_idx_type row = 0; row < nr; row++)
     {
       count = row;
-      octave_idx_type pos = 0;
 
       // Print the next row.
 
@@ -264,7 +263,6 @@
           octave_idx_type spaces_to_pad = max_name_length - name_length;
           for (octave_idx_type i = 0; i < spaces_to_pad; i++)
             os << ' ';
-          pos += max_name_length;
         }
       os << "\n";
     }
--- a/liboctave/wrappers/module.mk	Sun Aug 28 22:44:49 2022 +0200
+++ b/liboctave/wrappers/module.mk	Mon Aug 29 13:58:00 2022 +0200
@@ -24,12 +24,12 @@
   %reldir%/set-program-name-wrapper.h \
   %reldir%/signal-wrappers.h \
   %reldir%/stat-wrappers.h \
+  %reldir%/strcase-wrappers.h \
   %reldir%/strdup-wrapper.h \
   %reldir%/strftime-wrapper.h \
   %reldir%/strmode-wrapper.h \
   %reldir%/strptime-wrapper.h \
   %reldir%/time-wrappers.h \
-  %reldir%/tmpfile-wrapper.h \
   %reldir%/uname-wrapper.h \
   %reldir%/unicase-wrappers.h \
   %reldir%/uniconv-wrappers.h \
@@ -67,12 +67,12 @@
   %reldir%/set-program-name-wrapper.c \
   %reldir%/signal-wrappers.c \
   %reldir%/stat-wrappers.c \
+  %reldir%/strcase-wrappers.c \
   %reldir%/strdup-wrapper.c \
   %reldir%/strftime-wrapper.c \
   %reldir%/strmode-wrapper.c \
   %reldir%/strptime-wrapper.c \
   %reldir%/time-wrappers.c \
-  %reldir%/tmpfile-wrapper.c \
   %reldir%/uname-wrapper.c \
   %reldir%/unicase-wrappers.c \
   %reldir%/uniconv-wrappers.c \
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/liboctave/wrappers/strcase-wrappers.c	Mon Aug 29 13:58:00 2022 +0200
@@ -0,0 +1,44 @@
+////////////////////////////////////////////////////////////////////////
+//
+// Copyright (C) 2022 The Octave Project Developers
+//
+// See the file COPYRIGHT.md in the top-level directory of this
+// distribution or <https://octave.org/copyright/>.
+//
+// This file is part of Octave.
+//
+// Octave is free software: you can redistribute it and/or modify it
+// under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Octave is distributed in the hope that it will be useful, but
+// WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Octave; see the file COPYING.  If not, see
+// <https://www.gnu.org/licenses/>.
+//
+////////////////////////////////////////////////////////////////////////
+
+#if defined (HAVE_CONFIG_H)
+#  include "config.h"
+#endif
+
+#include <strings.h>
+
+#include "strcase-wrappers.h"
+
+OCTAVE_API int
+octave_strcasecmp (const char *s1, const char *s2)
+{
+  return strcasecmp (s1, s2);
+}
+
+OCTAVE_API int
+octave_strncasecmp (const char *s1, const char *s2, size_t n)
+{
+  return strncasecmp (s1, s2, n);
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/liboctave/wrappers/strcase-wrappers.h	Mon Aug 29 13:58:00 2022 +0200
@@ -0,0 +1,49 @@
+////////////////////////////////////////////////////////////////////////
+//
+// Copyright (C) 2022 The Octave Project Developers
+//
+// See the file COPYRIGHT.md in the top-level directory of this
+// distribution or <https://octave.org/copyright/>.
+//
+// This file is part of Octave.
+//
+// Octave is free software: you can redistribute it and/or modify it
+// under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Octave is distributed in the hope that it will be useful, but
+// WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Octave; see the file COPYING.  If not, see
+// <https://www.gnu.org/licenses/>.
+//
+////////////////////////////////////////////////////////////////////////
+
+#if ! defined (octave_strcase_wrappers_h)
+#define octave_strcase_wrappers_h 1
+
+#include "octave-config.h"
+
+#if defined (__cplusplus)
+#include <cstddef>
+using std::size_t;
+extern "C" {
+#else
+#include <stddef.h>
+#endif
+
+OCTAVE_API int
+octave_strcasecmp (const char *s1, const char *s2);
+
+OCTAVE_API int
+octave_strncasecmp (const char *s1, const char *s2, size_t n);
+
+#if defined (__cplusplus)
+}
+#endif
+
+#endif
--- a/liboctave/wrappers/tmpfile-wrapper.c	Sun Aug 28 22:44:49 2022 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,42 +0,0 @@
-////////////////////////////////////////////////////////////////////////
-//
-// Copyright (C) 2016-2022 The Octave Project Developers
-//
-// See the file COPYRIGHT.md in the top-level directory of this
-// distribution or <https://octave.org/copyright/>.
-//
-// This file is part of Octave.
-//
-// Octave is free software: you can redistribute it and/or modify it
-// under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// Octave is distributed in the hope that it will be useful, but
-// WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with Octave; see the file COPYING.  If not, see
-// <https://www.gnu.org/licenses/>.
-//
-////////////////////////////////////////////////////////////////////////
-
-// tmpfile may be provided by gnulib.  We don't include gnulib headers
-// directly in Octave's C++ source files to avoid problems that may be
-// caused by the way that gnulib overrides standard library functions.
-
-#if defined (HAVE_CONFIG_H)
-#  include "config.h"
-#endif
-
-#include <stdio.h>
-
-#include "tmpfile-wrapper.h"
-
-FILE *
-octave_tmpfile_wrapper (void)
-{
-  return tmpfile ();
-}
--- a/liboctave/wrappers/tmpfile-wrapper.h	Sun Aug 28 22:44:49 2022 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,48 +0,0 @@
-////////////////////////////////////////////////////////////////////////
-//
-// Copyright (C) 2016-2022 The Octave Project Developers
-//
-// See the file COPYRIGHT.md in the top-level directory of this
-// distribution or <https://octave.org/copyright/>.
-//
-// This file is part of Octave.
-//
-// Octave is free software: you can redistribute it and/or modify it
-// under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// Octave is distributed in the hope that it will be useful, but
-// WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with Octave; see the file COPYING.  If not, see
-// <https://www.gnu.org/licenses/>.
-//
-////////////////////////////////////////////////////////////////////////
-
-#if ! defined (octave_tmpfile_wrapper_h)
-#define octave_tmpfile_wrapper_h 1
-
-#if defined __cplusplus
-#  include <cstdio>
-#else
-#  include <stdio.h>
-#endif
-
-#if defined __cplusplus
-extern "C" {
-#endif
-
-// c++11 provides std::tmpfile but it appears to fail on 64-bit
-// Windows systems.
-
-extern OCTAVE_API FILE * octave_tmpfile_wrapper (void);
-
-#if defined __cplusplus
-}
-#endif
-
-#endif
--- a/liboctave/wrappers/uniconv-wrappers.c	Sun Aug 28 22:44:49 2022 +0200
+++ b/liboctave/wrappers/uniconv-wrappers.c	Mon Aug 29 13:58:00 2022 +0200
@@ -72,6 +72,24 @@
                                src, srclen, NULL, NULL, lengthp);
 }
 
+uint8_t *
+octave_u8_conv_from_encoding_offsets
+  (const char *fromcode, const char *src, size_t srclen,
+   size_t *offsets, size_t *lengthp)
+{
+  return u8_conv_from_encoding (fromcode, iconveh_question_mark,
+                                src, srclen, offsets, NULL, lengthp);
+}
+
+char *
+octave_u8_conv_to_encoding_offsets
+  (const char *tocode, const uint8_t *src, size_t srclen,
+   size_t *offsets, size_t *lengthp)
+{
+  return u8_conv_to_encoding (tocode, iconveh_question_mark,
+                              src, srclen, offsets, NULL, lengthp);
+}
+
 char *
 u8_from_wchar (const wchar_t *wc)
 {
--- a/liboctave/wrappers/uniconv-wrappers.h	Sun Aug 28 22:44:49 2022 +0200
+++ b/liboctave/wrappers/uniconv-wrappers.h	Mon Aug 29 13:58:00 2022 +0200
@@ -57,6 +57,16 @@
 octave_u32_conv_to_encoding_strict (const char *tocode, const uint32_t *src,
                                     size_t srclen, size_t *lengthp);
 
+extern OCTAVE_API uint8_t *
+octave_u8_conv_from_encoding_offsets
+  (const char *fromcode, const char *src, size_t srclen,
+   size_t *offsets, size_t *lengthp);
+
+extern OCTAVE_API char *
+octave_u8_conv_to_encoding_offsets
+  (const char *tocode, const uint8_t *src, size_t srclen,
+   size_t *offsets, size_t *lengthp);
+
 extern OCTAVE_API char * u8_from_wchar (const wchar_t *wc);
 
 extern OCTAVE_API wchar_t * u8_to_wchar (const char *u8_char);
--- a/m4/acinclude.m4	Sun Aug 28 22:44:49 2022 +0200
+++ b/m4/acinclude.m4	Mon Aug 29 13:58:00 2022 +0200
@@ -1,12 +1,11 @@
-dnl aclocal.m4 -- extra macros for configuring Octave
+dnl acinclude.m4 -- extra macros for configuring Octave
 dnl
 dnl --------------------------------------------------------------------
 dnl
 dnl Copyright (C) 1995-2022 The Octave Project Developers
 dnl
 dnl See the file COPYRIGHT.md in the top-level directory of this
-dnl or <https://octave.org/copyright/>.
-dnl
+dnl distribution or <https://octave.org/copyright/>.
 dnl
 dnl This file is part of Octave.
 dnl
@@ -689,7 +688,7 @@
 dnl
 AC_DEFUN([OCTAVE_CHECK_FUNC_QPRINTER_SETPAGESIZE], [
   AC_CACHE_CHECK([for QPrinter::setPageSize in <QPrinter>],
-    [octave_cv_func_qprinter_setpagesizes],
+    [octave_cv_func_qprinter_setpagesize],
     [AC_LANG_PUSH(C++)
     ac_octave_save_CPPFLAGS="$CPPFLAGS"
     ac_octave_save_CXXFLAGS="$CXXFLAGS"
@@ -1354,7 +1353,7 @@
       [octave_cv_lib_hdf5_dll=no],
       [save_CFLAGS="$CFLAGS"
       CFLAGS="$CFLAGS -DWIN32 -D_HDF5USEDLL_"
-      save_LIBS="$LIBS"
+      ac_octave_save_LIBS="$LIBS"
       LIBS="$HDF5_LIBS $LIBS"
       AC_LINK_IFELSE([AC_LANG_PROGRAM([[
           #include <hdf5.h>
@@ -1365,7 +1364,7 @@
         octave_cv_lib_hdf5_dll=yes,
         octave_cv_lib_hdf5_dll=no)
       CFLAGS="$save_CFLAGS"
-      LIBS="$save_LIBS"
+      LIBS="$ac_octave_save_LIBS"
     ])
   ])
   if test $octave_cv_lib_hdf5_dll = yes; then
@@ -1433,7 +1432,7 @@
       ])
       case $canonical_host_type in
         *-*-mingw32* | *-*-msdosmsvc)
-          save_LIBS="$LIBS"
+          ac_octave_save_LIBS="$LIBS"
           LIBS="$LIBS -lopengl32"
           AC_MSG_CHECKING([for glEnable in -lopengl32])
           AC_LINK_IFELSE([AC_LANG_PROGRAM([[
@@ -1449,7 +1448,7 @@
             glEnable(GL_SMOOTH);
             ]])], [OPENGL_LIBS="-lopengl32 -lglu32"])
 
-          LIBS="$save_LIBS"
+          LIBS="$ac_octave_save_LIBS"
           if test -n "$OPENGL_LIBS"; then
             AC_MSG_RESULT([yes])
           else
@@ -1760,7 +1759,7 @@
       [save_CPPFLAGS="$CPPFLAGS"
       save_CXXFLAGS="$CXXFLAGS"
       save_LDFLAGS="$LDFLAGS"
-      save_LIBS="$LIBS"
+      ac_octave_save_LIBS="$LIBS"
       CPPFLAGS="$QT_CPPFLAGS $CXXPICFLAG $CPPFLAGS"
       CXXFLAGS="$CXXPICFLAG $CXXFLAGS"
       LDFLAGS="$QT_LDFLAGS $LDFLAGS"
@@ -1783,7 +1782,7 @@
       CPPFLAGS="$save_CPPFLAGS"
       CXXFLAGS="$save_CXXFLAGS"
       LDFLAGS="$save_LDFLAGS"
-      LIBS="$save_LIBS"
+      LIBS="$ac_octave_save_LIBS"
       AC_LANG_POP([C++])
     ])
 
@@ -3240,7 +3239,7 @@
 AC_DEFUN([OCTAVE_PROG_GHOSTSCRIPT], [
   case "$canonical_host_type" in
     *-*-mingw* | *-*-msdosmsvc)
-      ac_octave_gs_names="gswin32c gs mgs"
+      ac_octave_gs_names="gs gswin32c gswin64c mgs"
     ;;
     *)
       ac_octave_gs_names="gs"
@@ -3409,7 +3408,7 @@
 dnl Find Python program.
 dnl
 AC_DEFUN([OCTAVE_PROG_PYTHON], [
-  AC_CHECK_PROG(PYTHON, python, python, [])
+  AC_CHECK_PROGS(PYTHON, [python3 python], python, [])
   AC_SUBST(PYTHON)
 ])
 dnl
@@ -3500,23 +3499,26 @@
 dnl
 AC_DEFUN([OCTAVE_PROG_TAR_REPRODUCIBLE], [
   AC_MSG_CHECKING([for options to make reproducible archives with GNU tar])
-dnl This uses Automake's logic for finding GNU tar under various names
-  for octave_tar in tar gnutar gtar :; do
-    $octave_tar --version >/dev/null 2>&1 && break
-  done
-dnl If we have a valid GNU tar program, see if it supports sets of options
-  if test x"$octave_tar" != x:; then
-    octave_tar_flags=
-    echo > conftest.txt
-    for octave_tar_flag in --owner=0 --group=0 --numeric-owner --sort=name; do
-      $octave_tar -cf conftest.tar $octave_tar_flags $octave_tar_flag conftest.txt 2>/dev/null
-      if test $? -eq 0; then
-        octave_tar_flags="${octave_tar_flags:+$octave_tar_flags }$octave_tar_flag"
-      fi
+  AC_CACHE_VAL([octave_cv_tar_flags],
+    [octave_cv_tar_flags=
+    dnl This uses Automake's logic for finding GNU tar under various names
+    for octave_tar in tar gnutar gtar :; do
+      $octave_tar --version >/dev/null 2>&1 && break
     done
-    rm -f conftest.tar conftest.txt
-    REPRODUCIBLE_TAR_FLAGS="$octave_tar_flags"
-  fi
+    dnl If we have a valid GNU tar program, see if it supports sets of options
+    if test x"$octave_tar" != x:; then
+      echo > conftest.txt
+      for octave_tar_flag in --owner=0 --group=0 --numeric-owner --sort=name; do
+        $octave_tar -cf conftest.tar $octave_cv_tar_flags $octave_tar_flag conftest.txt 2>/dev/null
+        if test $? -eq 0; then
+          octave_cv_tar_flags="${octave_cv_tar_flags:+$octave_cv_tar_flags }$octave_tar_flag"
+        fi
+      done
+      rm -f conftest.tar conftest.txt
+    fi
+  ])
+
+  REPRODUCIBLE_TAR_FLAGS="$octave_cv_tar_flags"
   AC_SUBST(REPRODUCIBLE_TAR_FLAGS)
   AC_MSG_RESULT([$REPRODUCIBLE_TAR_FLAGS])
 ])
--- a/m4/ax_cxx_compile_stdcxx.m4	Sun Aug 28 22:44:49 2022 +0200
+++ b/m4/ax_cxx_compile_stdcxx.m4	Mon Aug 29 13:58:00 2022 +0200
@@ -10,8 +10,8 @@
 #
 #   Check for baseline language coverage in the compiler for the specified
 #   version of the C++ standard.  If necessary, add switches to CXX and
-#   CXXCPP to enable support.  VERSION may be '11' (for the C++11 standard)
-#   or '14' (for the C++14 standard).
+#   CXXCPP to enable support.  VERSION may be '11', '14', '17', or '20' for
+#   the respective C++ standard version.
 #
 #   The second argument, if specified, indicates whether you insist on an
 #   extended mode (e.g. -std=gnu++11) or a strict conformance mode (e.g.
@@ -36,13 +36,14 @@
 #   Copyright (c) 2016, 2018 Krzesimir Nowak <qdlacz@gmail.com>
 #   Copyright (c) 2019 Enji Cooper <yaneurabeya@gmail.com>
 #   Copyright (c) 2020 Jason Merrill <jason@redhat.com>
+#   Copyright (c) 2021 Jörn Heusipp <osmanx@problemloesungsmaschine.de>
 #
 #   Copying and distribution of this file, with or without modification, are
 #   permitted in any medium without royalty provided the copyright notice
 #   and this notice are preserved.  This file is offered as-is, without any
 #   warranty.
 
-#serial 12
+#serial 14
 
 dnl  This macro is based on the code from the AX_CXX_COMPILE_STDCXX_11 macro
 dnl  (serial version number 13).
@@ -51,6 +52,7 @@
   m4_if([$1], [11], [ax_cxx_compile_alternatives="11 0x"],
         [$1], [14], [ax_cxx_compile_alternatives="14 1y"],
         [$1], [17], [ax_cxx_compile_alternatives="17 1z"],
+        [$1], [20], [ax_cxx_compile_alternatives="20"],
         [m4_fatal([invalid first argument `$1' to AX_CXX_COMPILE_STDCXX])])dnl
   m4_if([$2], [], [],
         [$2], [ext], [],
@@ -151,7 +153,6 @@
   _AX_CXX_COMPILE_STDCXX_testbody_new_in_11
 )
 
-
 dnl  Test body for checking C++14 support
 
 m4_define([_AX_CXX_COMPILE_STDCXX_testbody_14],
@@ -159,12 +160,24 @@
   _AX_CXX_COMPILE_STDCXX_testbody_new_in_14
 )
 
+dnl  Test body for checking C++17 support
+
 m4_define([_AX_CXX_COMPILE_STDCXX_testbody_17],
   _AX_CXX_COMPILE_STDCXX_testbody_new_in_11
   _AX_CXX_COMPILE_STDCXX_testbody_new_in_14
   _AX_CXX_COMPILE_STDCXX_testbody_new_in_17
 )
 
+dnl  Test body for checking C++20 support
+
+m4_define([_AX_CXX_COMPILE_STDCXX_testbody_20],
+  _AX_CXX_COMPILE_STDCXX_testbody_new_in_11
+  _AX_CXX_COMPILE_STDCXX_testbody_new_in_14
+  _AX_CXX_COMPILE_STDCXX_testbody_new_in_17
+  _AX_CXX_COMPILE_STDCXX_testbody_new_in_20
+)
+
+
 dnl  Tests for new features in C++11
 
 m4_define([_AX_CXX_COMPILE_STDCXX_testbody_new_in_11], [[
@@ -960,3 +973,33 @@
 #endif  // __cplusplus < 201703L
 
 ]])
+
+
+dnl  Tests for new features in C++20
+
+m4_define([_AX_CXX_COMPILE_STDCXX_testbody_new_in_20], [[
+
+#ifndef __cplusplus
+
+#error "This is not a C++ compiler"
+
+#elif __cplusplus < 202002L
+
+#error "This is not a C++20 compiler"
+
+#else
+
+#include <version>
+
+namespace cxx20
+{
+
+// As C++20 supports feature test macros in the standard, there is no
+// immediate need to actually test for feature availability on the
+// Autoconf side.
+
+}  // namespace cxx20
+
+#endif  // __cplusplus < 202002L
+
+]])
--- a/m4/module.mk	Sun Aug 28 22:44:49 2022 +0200
+++ b/m4/module.mk	Mon Aug 29 13:58:00 2022 +0200
@@ -12,5 +12,5 @@
   %reldir%/ltsugar.m4 \
   %reldir%/ltversion.m4 \
   %reldir%/lt~obsolete.m4 \
-  %reldir%/octave_blas_f77_func.m4 \
+  %reldir%/octave_blas.m4 \
   %reldir%/pkg.m4
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/m4/octave_blas.m4	Mon Aug 29 13:58:00 2022 +0200
@@ -0,0 +1,109 @@
+dnl --------------------------------------------------------------------
+dnl
+dnl Copyright (C) 2022 The Octave Project Developers
+dnl
+dnl See the file COPYRIGHT.md in the top-level directory of this
+dnl distribution or <https://octave.org/copyright/>.
+dnl
+dnl This file is part of Octave.
+dnl
+dnl Octave is free software: you can redistribute it and/or modify it
+dnl under the terms of the GNU General Public License as published by
+dnl the Free Software Foundation, either version 3 of the License, or
+dnl (at your option) any later version.
+dnl
+dnl Octave is distributed in the hope that it will be useful, but
+dnl WITHOUT ANY WARRANTY; without even the implied warranty of
+dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+dnl GNU General Public License for more details.
+dnl
+dnl You should have received a copy of the GNU General Public License
+dnl along with Octave; see the file COPYING.  If not, see
+dnl <https://www.gnu.org/licenses/>.
+dnl
+dnl --------------------------------------------------------------------
+dnl
+dnl Check for BLAS library and, if valid, determine integer size of library
+dnl
+AC_DEFUN([OCTAVE_BLAS], [
+  AC_PREREQ(2.50)
+  dnl Call reference macro to find BLAS library
+  AX_BLAS
+
+  if test "$cross_compiling" = yes ; then
+    dnl Assume BLAS library exists when cross compiling
+    ax_blas_ok=yes
+    AC_MSG_CHECKING([BLAS can be called from Fortran])
+    AC_MSG_RESULT([yes assumed for cross compilation])
+    dnl Assume generic 4-byte BLAS library if not specified
+    AC_MSG_CHECKING([BLAS library integer size])
+    if test -z "$ax_cv_blas_integer_size" ; then
+      ax_cv_blas_integer_size=4
+    fi
+    AC_MSG_RESULT([$ax_cv_blas_integer_size assumed for cross compilation])
+  elif test $ax_blas_ok = yes; then
+    ac_octave_save_LIBS="$LIBS"
+    LIBS="$BLAS_LIBS $LIBS"
+    AC_LANG_PUSH(Fortran 77)
+    ## Check BLAS library integer size.
+    ## If it does not appear to be 8 bytes, we assume it is 4 bytes.
+    ## FIXME: this may fail with options like -ftrapping-math.
+    AC_CACHE_CHECK([BLAS library integer size],
+      [ax_cv_blas_integer_size],
+      [AC_RUN_IFELSE([AC_LANG_PROGRAM(,[[
+      integer*8 two, n
+      integer*4 n2(2)
+      double precision d, a(1), b(1), ddot
+      equivalence (n, n2)
+
+      a(1) = 1.0
+      b(1) = 1.0
+
+c Generate 2**32 + 1 in an 8-byte integer.  Whether we have a big
+c endian or little endian system, both 4-byte words of this value
+c should be 1.
+
+      two = 2
+      n = (two ** 32) + 1
+
+c Check that our expectation about the type conversions are correct.
+
+      if (n2(1) .ne. 1 .or. n2(2) .ne. 1) then
+        print *, 'invalid assumption about integer type conversion'
+        stop 2
+      endif
+
+*     print *, n, n2(1), n2(2)
+*     print *, a(1), b(1)
+
+c DDOT will either see 1 or a large value for N.  Since INCX and INCY
+c are both 0, we will never increment the index, so A and B only need to
+c have a single element.  If N is interpreted as 1 (BLAS compiled with
+c 4-byte integers) then the result will be 1.  If N is interpreted as a
+c large value (BLAS compiled with 8-byte integers) then the result will
+c be the summation a(1)*b(1) 2^32+1 times.  This will also take some
+c time to compute, but at least for now it is the unusual case so we are
+c much more likely to exit quickly after detecting that the BLAS library
+c was compiled with 4-byte integers.
+
+      d = ddot (n, a, 0, b, 0)
+
+*     print *, a(1), b(1), d
+
+c Success (0 exit status) means we detected BLAS compiled with
+c 8-byte integers.
+
+      if (d .eq. 1.0) then
+        stop 1
+      endif
+
+        ]])],
+        ax_cv_blas_integer_size=8,
+        ax_cv_blas_integer_size=4)
+      ])
+
+  AC_LANG_POP(Fortran 77)
+  LIBS="$ac_octave_save_LIBS"
+fi
+
+])
--- a/m4/octave_blas_f77_func.m4	Sun Aug 28 22:44:49 2022 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,238 +0,0 @@
-# OCTAVE_BLAS_F77_FUNC
-#
-# The same as AX_BLAS_F77_FUNC (described below) except attempt to
-# determine whether the BLAS library uses 32- or 64-bit integers instead
-# of failing if the default size of Fortran integers does not appear to
-# match the size of integers used by the BLAS library.
-
-# ===========================================================================
-#     https://www.gnu.org/software/autoconf-archive/ax_blas_f77_func.html
-# ===========================================================================
-#
-# SYNOPSIS
-#
-#   AX_BLAS_F77_FUNC([ACTION-IF-PASS[, ACTION-IF-FAIL[, ACTION-IF-CROSS-COMPILING]])
-#   AX_BLAS_WITH_F77_FUNC([ACTION-IF-FOUND-AND-PASS[, ACTION-IF-NOT-FOUND-OR-FAIL]])
-#
-# DESCRIPTION
-#
-#   These macros are intended as a supplement to the AX_BLAS macro, to
-#   verify that BLAS functions are properly callable from Fortran. This is
-#   necessary, for example, if you want to build the LAPACK library on top
-#   of the BLAS.
-#
-#   AX_BLAS_F77_FUNC uses the defined BLAS_LIBS and Fortran environment to
-#   check for compatibility, and takes a specific action in case of success,
-#   resp. failure, resp. cross-compilation.
-#
-#   AX_BLAS_WITH_F77_FUNC is a drop-in replacement wrapper for AX_BLAS that
-#   calls AX_BLAS_F77_FUNC after detecting a BLAS library and rejects it on
-#   failure (i.e. pretends that no library was found).
-#
-# LICENSE
-#
-#   Copyright (c) 2008 Jaroslav Hajek <highegg@gmail.com>
-#
-#   This program is free software: you can redistribute it and/or modify it
-#   under the terms of the GNU General Public License as published by the
-#   Free Software Foundation, either version 3 of the License, or (at your
-#   option) any later version.
-#
-#   This program is distributed in the hope that it will be useful, but
-#   WITHOUT ANY WARRANTY; without even the implied warranty of
-#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
-#   Public License for more details.
-#
-#   You should have received a copy of the GNU General Public License along
-#   with this program. If not, see <https://www.gnu.org/licenses/>.
-#
-#   As a special exception, the respective Autoconf Macro's copyright owner
-#   gives unlimited permission to copy, distribute and modify the configure
-#   scripts that are the output of Autoconf when processing the Macro. You
-#   need not follow the terms of the GNU General Public License when using
-#   or distributing such scripts, even though portions of the text of the
-#   Macro appear in them. The GNU General Public License (GPL) does govern
-#   all other use of the material that constitutes the Autoconf Macro.
-#
-#   This special exception to the GPL applies to versions of the Autoconf
-#   Macro released by the Autoconf Archive. When you make and distribute a
-#   modified version of the Autoconf Macro, you may extend this special
-#   exception to the GPL to apply to your modified version as well.
-
-#serial 8
-
-## Derived from
-AC_DEFUN([OCTAVE_BLAS_F77_FUNC], [
-AC_PREREQ(2.50)
-AC_REQUIRE([AX_BLAS])
-
-# F77 call-compatibility checks
-if test "$cross_compiling" = yes ; then
-        ifelse($3, ,$1,$3)
-elif test x"$ax_blas_ok" = xyes; then
-        save_ax_blas_f77_func_LIBS="$LIBS"
-        LIBS="$BLAS_LIBS $LIBS"
-        AC_LANG_PUSH(Fortran 77)
-# LSAME check (LOGICAL return values)
-        AC_MSG_CHECKING([whether LSAME is called correctly from Fortran])
-        AC_RUN_IFELSE(AC_LANG_PROGRAM(,[[
-      logical lsame,w
-      external lsame
-      character c1,c2
-      c1 = 'A'
-      c2 = 'B'
-      w = lsame(c1,c2)
-      if (w) stop 1
-      w = lsame(c1,c1)
-      if (.not. w) stop 1
-      ]]),[ax_blas_lsame_fcall_ok=yes],
-        [ax_blas_lsame_fcall_ok=no])
-        AC_MSG_RESULT([$ax_blas_lsame_fcall_ok])
-# ISAMAX check (INTEGER return values)
-        AC_MSG_CHECKING([whether ISAMAX is called correctly from Fortran])
-        AC_RUN_IFELSE(AC_LANG_PROGRAM(,[[
-      integer isamax,i
-      external isamax
-      real a(2)
-      a(1) = 1e0
-      a(2) = -2e0
-      i = isamax(2,a,1)
-      if (i.ne.2) stop 1
-      ]]),[ax_blas_isamax_fcall_ok=yes],
-        [ax_blas_isamax_fcall_ok=no])
-        AC_MSG_RESULT([$ax_blas_isamax_fcall_ok])
-# SDOT check (REAL return values)
-        AC_MSG_CHECKING([whether SDOT is called correctly from Fortran])
-        AC_RUN_IFELSE(AC_LANG_PROGRAM(,[[
-      real sdot,a(1),b(1),w
-      external sdot
-      a(1) = 1e0
-      b(1) = 2e0
-      w = sdot(1,a,1,b,1)
-      if (w .ne. a(1)*b(1)) stop 1
-      ]]),[ax_blas_sdot_fcall_ok=yes],
-        [ax_blas_sdot_fcall_ok=no])
-        AC_MSG_RESULT([$ax_blas_sdot_fcall_ok])
-# DDOT check (DOUBLE return values)
-        AC_MSG_CHECKING([whether DDOT is called correctly from Fortran])
-        AC_RUN_IFELSE(AC_LANG_PROGRAM(,[[
-      double precision ddot,a(1),b(1),w
-      external ddot
-      a(1) = 1d0
-      b(1) = 2d0
-      w = ddot(1,a,1,b,1)
-      if (w .ne. a(1)*b(1)) stop 1
-      ]]),[ax_blas_ddot_fcall_ok=yes],
-        [ax_blas_ddot_fcall_ok=no])
-        AC_MSG_RESULT([$ax_blas_ddot_fcall_ok])
-# CDOTU check (COMPLEX return values)
-        AC_MSG_CHECKING([whether CDOTU is called correctly from Fortran])
-        AC_RUN_IFELSE(AC_LANG_PROGRAM(,[[
-      complex cdotu,a(1),b(1),w
-      external cdotu
-      a(1) = cmplx(1e0,1e0)
-      b(1) = cmplx(1e0,2e0)
-      w = cdotu(1,a,1,b,1)
-      if (w .ne. a(1)*b(1)) stop 1
-      ]]),[ax_blas_cdotu_fcall_ok=yes],
-        [ax_blas_cdotu_fcall_ok=no])
-        AC_MSG_RESULT([$ax_blas_cdotu_fcall_ok])
-# ZDOTU check (DOUBLE COMPLEX return values)
-        AC_MSG_CHECKING([whether ZDOTU is called correctly from Fortran])
-        AC_RUN_IFELSE(AC_LANG_PROGRAM(,[[
-      double complex zdotu,a(1),b(1),w
-      external zdotu
-      a(1) = dcmplx(1d0,1d0)
-      b(1) = dcmplx(1d0,2d0)
-      w = zdotu(1,a,1,b,1)
-      if (w .ne. a(1)*b(1)) stop 1
-      ]]),[ax_blas_zdotu_fcall_ok=yes],
-        [ax_blas_zdotu_fcall_ok=no])
-        AC_MSG_RESULT([$ax_blas_zdotu_fcall_ok])
-# Check BLAS library integer size.  If it does not appear to be
-# 8 bytes, we assume it is 4 bytes.
-# FIXME: this may fail with things like -ftrapping-math.
-        AC_MSG_CHECKING([BLAS library integer size])
-        AC_RUN_IFELSE(AC_LANG_PROGRAM(,[[
-      integer*8 two, n
-      integer*4 n2(2)
-      double precision d, a(1), b(1), ddot
-      equivalence (n, n2)
-
-      a(1) = 1.0
-      b(1) = 1.0
-
-c Generate 2**32 + 1 in an 8-byte integer.  Whether we have a big
-c endian or little endian system, both 4-byte words of this value
-c should be 1.
-
-      two = 2
-      n = (two ** 32) + 1
-
-c Check that our expectation about the type conversions are correct.
-
-      if (n2(1) .ne. 1 .or. n2(2) .ne. 1) then
-        print *, 'invalid assumption about integer type conversion'
-        stop 2
-      endif
-
-*     print *, n, n2(1), n2(2)
-*     print *, a(1), b(1)
-
-c DDOT will either see 1 or a large value for N.  Since INCX and INCY
-c are both 0, we will never increment the index, so A and B only need to
-c have a single element.  If N is interpreted as 1 (BLAS compiled with 4
-c byte integers) then the result will be 1.  If N is interpreted as a
-c large value (BLAS compiled with 8 byte integers) then the result will
-c be the summation a(1)*b(1) 2^32+1 times.  This will also take some
-c time to compute, but at least for now it is the unusual case so we are
-c much more likely to exit quickly after detecting that the BLAS library
-c was compiled with 4-byte integers.
-
-      d = ddot (n, a, 0, b, 0)
-
-*     print *, a(1), b(1), d
-
-c Success (0 exit status) means we detected BLAS compiled with
-c 8-byte integers.
-
-      if (d .eq. 1.0) then
-        stop 1
-      endif
-
-       ]]),[ax_blas_integer_size=8],
-        [ax_blas_integer_size=4])
-        AC_MSG_RESULT([$ax_blas_integer_size])
-
-        AC_LANG_POP(Fortran 77)
-
-# if any of the tests failed, reject the BLAS library
-        if test $ax_blas_lsame_fcall_ok = yes \
-                -a $ax_blas_sdot_fcall_ok = yes \
-                -a $ax_blas_ddot_fcall_ok = yes \
-                -a $ax_blas_cdotu_fcall_ok = yes \
-                -a $ax_blas_zdotu_fcall_ok = yes ; then
-                ax_blas_f77_func_ok=yes;
-                $1
-        else
-                ax_blas_f77_func_ok=no;
-                $2
-        fi
-        LIBS="$save_ax_blas_f77_func_LIBS"
-fi
-
-])dnl AX_BLAS_F77_FUNC
-
-AC_DEFUN([OCTAVE_BLAS_WITH_F77_FUNC], [
-AC_PREREQ(2.50)
-AX_BLAS([# disable special action], [])
-if test x$ax_blas_ok = xyes ; then
-        OCTAVE_BLAS_F77_FUNC(
-        [ifelse([$1],,AC_DEFINE(HAVE_BLAS,1,[Define if you have a BLAS library.]),[$1])],
-        [ax_blas_ok=no; BLAS_LIBS=])
-fi
-if test x$ax_blas_ok = xno ; then
-        :
-        $2
-fi
-])dnl AX_BLAS_WITH_F77_FUNC
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/oct-conf-post-private.in.h	Mon Aug 29 13:58:00 2022 +0200
@@ -0,0 +1,112 @@
+////////////////////////////////////////////////////////////////////////
+//
+// Copyright (C) 1993-2022 The Octave Project Developers
+//
+// See the file COPYRIGHT.md in the top-level directory of this
+// distribution or <https://octave.org/copyright/>.
+//
+// This file is part of Octave.
+//
+// Octave is free software: you can redistribute it and/or modify it
+// under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Octave is distributed in the hope that it will be useful, but
+// WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Octave; see the file COPYING.  If not, see
+// <https://www.gnu.org/licenses/>.
+//
+////////////////////////////////////////////////////////////////////////
+
+#if ! defined (HAVE_DEV_T)
+typedef short dev_t;
+#endif
+
+#if ! defined (HAVE_INO_T)
+typedef unsigned long ino_t;
+#endif
+
+#if defined (_MSC_VER)
+#  define __WIN32__ 1
+#  define WIN32 1
+   /* missing parameters in macros */
+#  pragma warning (disable: 4003)
+   /* missing implementations in template instantiation */
+#  pragma warning (disable: 4996)
+   /* deprecated function names (FIXME: ???) */
+#  pragma warning (disable: 4661)
+#endif
+
+#if defined (__APPLE__) && defined (__MACH__)
+#  define OCTAVE_USE_OS_X_API 1
+#endif
+
+/* Silence deprecated API warning from Apple OS > 10.14 */
+#if defined (__APPLE__) && defined (__MACH__) && defined (HAVE_OPENGL)
+#  define GL_SILENCE_DEPRECATION 1
+#endif
+
+/* Define to 1 if we expect to have <windows.h>, Sleep, etc. */
+#if defined (__WIN32__) && ! defined (__CYGWIN__)
+#  define OCTAVE_USE_WINDOWS_API 1
+#endif
+
+#if defined (OCTAVE_USE_WINDOWS_API)
+#  define OCTAVE_HAVE_WINDOWS_FILESYSTEM 1
+#elif defined (__CYGWIN__)
+#  define OCTAVE_HAVE_WINDOWS_FILESYSTEM 1
+#  define OCTAVE_HAVE_POSIX_FILESYSTEM 1
+#else
+#  define OCTAVE_HAVE_POSIX_FILESYSTEM 1
+#endif
+
+#if defined (__MINGW32__)
+  /* We need to include this header or __MSVCRT_VERSION__ might not be defined
+     to the correct value */
+#  include <_mingw.h>
+#endif
+/* assume that Windows will support UTF-8 locales when using UCRT */
+#if defined (__MSVCRT_VERSION__) && __MSVCRT_VERSION__ == 0x0E00
+#  define OCTAVE_HAVE_WINDOWS_UTF8_LOCALE 1
+#endif
+
+/* sigsetjmp is a macro, not a function. */
+#if defined (sigsetjmp) && defined (HAVE_SIGLONGJMP)
+#  define OCTAVE_HAVE_SIG_JUMP 1
+#endif
+
+/* To be able to use long doubles for 64-bit mixed arithmetics, we need
+   them at least 80 bits wide and we need roundl declared in math.h.
+   FIXME: Maybe substitute this by a more precise check in the future?  */
+#if (SIZEOF_LONG_DOUBLE >= 10) && defined (HAVE_ROUNDL)
+#  define OCTAVE_INT_USE_LONG_DOUBLE
+#  if (SIZEOF_LONG_DOUBLE < 16                                          \
+       && (defined __i386__ || defined __x86_64__) && defined __GNUC__)
+#    define OCTAVE_ENSURE_LONG_DOUBLE_OPERATIONS_ARE_NOT_TRUNCATED 1
+#  endif
+#endif
+
+/* Make all .oct file interpreter functions and methods static.  */
+#define OCTAVE_USE_STATIC_DEFUN
+
+/* This macro is intended to be used only to enable inline functions or
+   typedefs that provide access to symbols that have been moved to the
+   octave namespace.  It may be temporarily useful to define this macro
+   when moving a symbol to the octave namespace but it should not be
+   defined when building released versions of Octave, as building those
+   should not require deprecated symbols.  It is defined in
+   octave-config.h, so users of Octave may continue to access symbols
+   using the deprecated names.  */
+/* #undef OCTAVE_PROVIDE_DEPRECATED_SYMBOLS */
+
+/* Tag indicating Octave's autoconf-generated config.h has been
+   included.  This symbol is provided because autoconf-generated
+   config.h files do not define a multiple-inclusion guard.  See also
+   the notes at the top of the generated octave-config.h file.  */
+
+#define OCTAVE_AUTOCONFIG_H_INCLUDED 1
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/oct-conf-post-public.in.h	Mon Aug 29 13:58:00 2022 +0200
@@ -0,0 +1,210 @@
+////////////////////////////////////////////////////////////////////////
+//
+// Copyright (C) 1993-2022 The Octave Project Developers
+//
+// See the file COPYRIGHT.md in the top-level directory of this
+// distribution or <https://octave.org/copyright/>.
+//
+// This file is part of Octave.
+//
+// Octave is free software: you can redistribute it and/or modify it
+// under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Octave is distributed in the hope that it will be useful, but
+// WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Octave; see the file COPYING.  If not, see
+// <https://www.gnu.org/licenses/>.
+//
+////////////////////////////////////////////////////////////////////////
+
+#if defined (__cplusplus)
+#  include <cinttypes>
+#else
+#  include <inttypes.h>
+#endif
+
+#  define OCTAVE_NAMESPACE_BEGIN namespace octave {
+#  define OCTAVE_NAMESPACE_END }
+
+/* The C++ standard is evolving to allow attribute hints in a
+   compiler-independent manner.  In C++ 2011 support for noreturn was
+   added.  In C++ 2014 support for deprecated was added.  The Octave
+   code base has been future-proofed by using macros of the form
+   OCTAVE_ATTRIBUTE_NAME in place of vendor specific attribute
+   mechanisms.  As compilers evolve, the underlying implementation can
+   be changed with the macro definitions below.  FIXME: Update macros
+   to use C++ standard attribute syntax when Octave moves to C++ 2011
+   standard.  */
+
+#if defined (__GNUC__)
+   /* The following attributes are used with gcc and clang compilers.  */
+#  if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5)
+#    define OCTAVE_DEPRECATED(ver, msg) __attribute__ ((__deprecated__ ("[" #ver "]: " msg)))
+#  else
+#    define OCTAVE_DEPRECATED(ver, msg) __attribute__ ((__deprecated__))
+#  endif
+#  define HAVE_OCTAVE_DEPRECATED_ATTR 1
+
+#  define OCTAVE_NORETURN __attribute__ ((__noreturn__))
+#  define HAVE_OCTAVE_NORETURN_ATTR 1
+
+#  define OCTAVE_UNUSED __attribute__ ((__unused__))
+#  define HAVE_OCTAVE_UNUSED_ATTR 1
+#else
+#  define OCTAVE_DEPRECATED(ver, msg)
+#  define OCTAVE_NORETURN
+#  define OCTAVE_UNUSED
+
+/* #  undef HAVE_OCTAVE_DEPRECATED_ATTR */
+/* #  undef HAVE_OCTAVE_NORETURN_ATTR */
+/* #  undef HAVE_OCTAVE_UNUSED_ATTR */
+#endif
+
+#if defined (__MINGW32__)
+  /* MinGW requires special handling due to different format specifiers
+   * on different platforms.  The macro __MINGW_PRINTF_FORMAT maps to
+   * either gnu_printf or ms_printf depending on where we are compiling
+   * to avoid warnings on format specifiers that are legal.
+   * See: https://bugzilla.mozilla.org/show_bug.cgi?id=1331349  */
+#  if defined (__cplusplus)
+#    include <cstdio>
+#  else
+#    include <stdio.h>
+#  endif
+
+#  define OCTAVE_FORMAT_PRINTF(stringIndex, firstToCheck) \
+     __attribute__ ((format (__MINGW_PRINTF_FORMAT, stringIndex, firstToCheck)))
+
+#  define HAVE_OCTAVE_FORMAT_PRINTF_ATTR 1
+#elif defined (__GNUC__)
+   /* The following attributes are used with gcc and clang compilers.  */
+#  define OCTAVE_FORMAT_PRINTF(index, first) \
+     __attribute__ ((__format__(printf, index, first)))
+
+#  define HAVE_OCTAVE_FORMAT_PRINTF_ATTR 1
+#else
+#  define OCTAVE_FORMAT_PRINTF(index, first)
+
+/* #  undef HAVE_OCTAVE_FORMAT_PRINTF_ATTR */
+#endif
+
+#if ! defined (OCTAVE_FALLTHROUGH)
+#  if defined (__cplusplus) && __cplusplus > 201402L
+#    define OCTAVE_FALLTHROUGH [[fallthrough]]
+#  elif defined (__GNUC__) && __GNUC__ < 7
+#    define OCTAVE_FALLTHROUGH ((void) 0)
+#  else
+#    define OCTAVE_FALLTHROUGH __attribute__ ((__fallthrough__))
+#  endif
+#endif
+
+#if defined (__cplusplus)
+template <typename T>
+static inline void
+octave_unused_parameter (const T&)
+{ }
+#else
+#  define octave_unused_parameter(param) (void) param;
+#endif
+
+#if defined (OCTAVE_ENABLE_LIB_VISIBILITY_FLAGS)
+#  if defined (_WIN32) || defined (__CYGWIN__)
+#    if defined (__GNUC__)
+       /* GCC */
+#      define OCTAVE_EXPORT __attribute__ ((dllexport))
+#      define OCTAVE_IMPORT __attribute__ ((dllimport))
+#    else
+       /* MSVC */
+#      define OCTAVE_EXPORT __declspec(dllexport)
+#      define OCTAVE_IMPORT __declspec(dllimport)
+#    endif
+#  else
+     /* All other platforms. */
+#    define OCTAVE_EXPORT __attribute__ ((visibility ("default")))
+#    define OCTAVE_IMPORT
+#  endif
+#else
+#  define OCTAVE_EXPORT
+#  define OCTAVE_IMPORT
+#endif
+
+/* API macro for liboctave */
+#if defined (OCTAVE_DLL)
+#  define OCTAVE_API OCTAVE_EXPORT
+#else
+#  define OCTAVE_API OCTAVE_IMPORT
+#endif
+
+/* API macro for liboctinterp */
+#if defined (OCTINTERP_DLL)
+#  define OCTINTERP_API OCTAVE_EXPORT
+#else
+#  define OCTINTERP_API OCTAVE_IMPORT
+#endif
+
+/* API macro for the Array class in liboctave and liboctinterp */
+#if (defined (OCTAVE_DLL) || defined (OCTINTERP_DLL))
+#  define OCTARRAY_API OCTAVE_EXPORT
+#else
+#  define OCTARRAY_API OCTAVE_IMPORT
+#endif
+
+/* API macro for libinterp/graphics */
+#if defined (OCTGRAPHICS_DLL)
+#  define OCTGRAPHICS_API OCTAVE_EXPORT
+#else
+#  define OCTGRAPHICS_API OCTAVE_IMPORT
+#endif
+
+/* API macro for libgui */
+#if defined (OCTGUI_DLL)
+#  define OCTGUI_API OCTAVE_EXPORT
+#else
+#  define OCTGUI_API OCTAVE_IMPORT
+#endif
+
+#if defined (OCTAVE_ENABLE_64)
+#  define OCTAVE_IDX_TYPE_FORMAT PRId64
+#else
+#  define OCTAVE_IDX_TYPE_FORMAT PRId32
+#endif
+
+#if OCTAVE_SIZEOF_F77_INT_TYPE == 8
+#  define OCTAVE_F77_INT_TYPE_FORMAT PRId64
+#else
+#  define OCTAVE_F77_INT_TYPE_FORMAT PRId32
+#endif
+
+#define OCTAVE_HAVE_F77_INT_TYPE 1
+
+/* time type in API is always 64 bits wide */
+#define OCTAVE_TIME_T int64_t
+
+#if defined (__cplusplus) && ! defined (OCTAVE_THREAD_LOCAL)
+#  define OCTAVE_THREAD_LOCAL
+#endif
+
+typedef OCTAVE_IDX_TYPE octave_idx_type;
+typedef OCTAVE_F77_INT_TYPE octave_f77_int_type;
+
+/* Backward compatibility */
+
+#if defined (OCTAVE_ENABLE_64)
+#  define USE_64_BIT_IDX_T 1
+#endif
+
+#if defined (OCTAVE_ENABLE_OPENMP)
+#  define HAVE_OPENMP 1
+#endif
+
+#if defined (OCTAVE_ENABLE_FLOAT_TRUNCATE)
+#  define OCTAVE_FLOAT_TRUNCATE volatile
+#else
+#  define OCTAVE_FLOAT_TRUNCATE
+#endif
--- a/oct-conf-post.in.h	Sun Aug 28 22:44:49 2022 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,297 +0,0 @@
-////////////////////////////////////////////////////////////////////////
-//
-// Copyright (C) 1993-2022 The Octave Project Developers
-//
-// See the file COPYRIGHT.md in the top-level directory of this
-// distribution or <https://octave.org/copyright/>.
-//
-// This file is part of Octave.
-//
-// Octave is free software: you can redistribute it and/or modify it
-// under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// Octave is distributed in the hope that it will be useful, but
-// WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with Octave; see the file COPYING.  If not, see
-// <https://www.gnu.org/licenses/>.
-//
-////////////////////////////////////////////////////////////////////////
-
-#  define OCTAVE_NAMESPACE_BEGIN namespace octave {
-#  define OCTAVE_NAMESPACE_END }
-
-/* The C++ standard is evolving to allow attribute hints in a
-   compiler-independent manner.  In C++ 2011 support for noreturn was
-   added.  In C++ 2014 support for deprecated was added.  The Octave
-   code base has been future-proofed by using macros of the form
-   OCTAVE_ATTRIBUTE_NAME in place of vendor specific attribute
-   mechanisms.  As compilers evolve, the underlying implementation can
-   be changed with the macro definitions below.  FIXME: Update macros
-   to use C++ standard attribute syntax when Octave moves to C++ 2011
-   standard.  */
-
-#if defined (__GNUC__)
-   /* The following attributes are used with gcc and clang compilers.  */
-#  if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5)
-#    define OCTAVE_DEPRECATED(ver, msg) __attribute__ ((__deprecated__ ("[" #ver "]: " msg)))
-#  else
-#    define OCTAVE_DEPRECATED(ver, msg) __attribute__ ((__deprecated__))
-#  endif
-#  define HAVE_OCTAVE_DEPRECATED_ATTR 1
-
-#  define OCTAVE_NORETURN __attribute__ ((__noreturn__))
-#  define HAVE_OCTAVE_NORETURN_ATTR 1
-
-#  define OCTAVE_UNUSED __attribute__ ((__unused__))
-#  define HAVE_OCTAVE_UNUSED_ATTR 1
-#else
-#  define OCTAVE_DEPRECATED(ver, msg)
-#  define OCTAVE_NORETURN
-#  define OCTAVE_UNUSED
-#endif
-
-#if defined (__MINGW32__)
-  /* MinGW requires special handling due to different format specifiers
-   * on different platforms.  The macro __MINGW_PRINTF_FORMAT maps to
-   * either gnu_printf or ms_printf depending on where we are compiling
-   * to avoid warnings on format specifiers that are legal.
-   * See: https://bugzilla.mozilla.org/show_bug.cgi?id=1331349  */
-#  if defined (__cplusplus)
-#    include <cstdio>
-#  else
-#    include <stdio.h>
-#  endif
-
-#  define OCTAVE_FORMAT_PRINTF(stringIndex, firstToCheck) \
-     __attribute__ ((format (__MINGW_PRINTF_FORMAT, stringIndex, firstToCheck)))
-
-#  define HAVE_OCTAVE_FORMAT_PRINTF_ATTR 1
-#elif defined (__GNUC__)
-   /* The following attributes are used with gcc and clang compilers.  */
-#  define OCTAVE_FORMAT_PRINTF(index, first) \
-     __attribute__ ((__format__(printf, index, first)))
-
-#  define HAVE_OCTAVE_FORMAT_PRINTF_ATTR 1
-#else
-#  define OCTAVE_FORMAT_PRINTF(index, first)
-
-/* #  undef HAVE_OCTAVE_FORMAT_PRINTF_ATTR */
-#endif
-
-#if ! defined (OCTAVE_FALLTHROUGH)
-#  if defined (__cplusplus) && __cplusplus > 201402L
-#    define OCTAVE_FALLTHROUGH [[fallthrough]]
-#  elif defined (__GNUC__) && __GNUC__ < 7
-#    define OCTAVE_FALLTHROUGH ((void) 0)
-#  else
-#    define OCTAVE_FALLTHROUGH __attribute__ ((__fallthrough__))
-#  endif
-#endif
-
-/* This macro is intended to be used only to enable inline functions or
-   typedefs that provide access to symbols that have been moved to the
-   octave namespace.  It may be temporarily useful to define this macro
-   when moving a symbol to the octave namespace but it should not be
-   defined when building released versions of Octave, as building those
-   should not require deprecated symbols.  It is defined in
-   octave-config.h, so users of Octave may continue to access symbols
-   using the deprecated names.  */
-/* #undef OCTAVE_PROVIDE_DEPRECATED_SYMBOLS */
-
-#if defined (__cplusplus)
-template <typename T>
-static inline void
-octave_unused_parameter (const T&)
-{ }
-#else
-#  define octave_unused_parameter(param) (void) param;
-#endif
-
-#if ! defined (HAVE_DEV_T)
-typedef short dev_t;
-#endif
-
-#if ! defined (HAVE_INO_T)
-typedef unsigned long ino_t;
-#endif
-
-#if defined (_MSC_VER)
-#  define __WIN32__ 1
-#  define WIN32 1
-   /* missing parameters in macros */
-#  pragma warning (disable: 4003)
-   /* missing implementations in template instantiation */
-#  pragma warning (disable: 4996)
-   /* deprecated function names (FIXME: ???) */
-#  pragma warning (disable: 4661)
-#endif
-
-#if defined (__APPLE__) && defined (__MACH__)
-#  define OCTAVE_USE_OS_X_API 1
-#endif
-
-/* Silence deprecated API warning from Apple OS > 10.14 */
-#if defined (__APPLE__) && defined (__MACH__) && defined (HAVE_OPENGL)
-#  define GL_SILENCE_DEPRECATION 1
-#endif
-
-/* Define to 1 if we expect to have <windows.h>, Sleep, etc. */
-#if defined (__WIN32__) && ! defined (__CYGWIN__)
-#  define OCTAVE_USE_WINDOWS_API 1
-#endif
-
-#if defined (OCTAVE_USE_WINDOWS_API)
-#  define OCTAVE_HAVE_WINDOWS_FILESYSTEM 1
-#elif defined (__CYGWIN__)
-#  define OCTAVE_HAVE_WINDOWS_FILESYSTEM 1
-#  define OCTAVE_HAVE_POSIX_FILESYSTEM 1
-#else
-#  define OCTAVE_HAVE_POSIX_FILESYSTEM 1
-#endif
-
-#if defined (__MINGW32__)
-  /* We need to include this header or __MSVCRT_VERSION__ might not be defined
-     to the correct value */
-#  include <_mingw.h>
-#endif
-/* assume that Windows will support UTF-8 locales when using UCRT */
-#if defined (__MSVCRT_VERSION__) && __MSVCRT_VERSION__ == 0x0E00
-#  define OCTAVE_HAVE_WINDOWS_UTF8_LOCALE 1
-#endif
-
-/* sigsetjmp is a macro, not a function. */
-#if defined (sigsetjmp) && defined (HAVE_SIGLONGJMP)
-#  define OCTAVE_HAVE_SIG_JUMP 1
-#endif
-
-/* To be able to use long doubles for 64-bit mixed arithmetics, we need
-   them at least 80 bits wide and we need roundl declared in math.h.
-   FIXME: Maybe substitute this by a more precise check in the future?  */
-#if (SIZEOF_LONG_DOUBLE >= 10) && defined (HAVE_ROUNDL)
-#  define OCTAVE_INT_USE_LONG_DOUBLE
-#  if (SIZEOF_LONG_DOUBLE < 16                                          \
-       && (defined __i386__ || defined __x86_64__) && defined __GNUC__)
-#    define OCTAVE_ENSURE_LONG_DOUBLE_OPERATIONS_ARE_NOT_TRUNCATED 1
-#  endif
-#endif
-
-/* oct-dlldefs.h */
-
-#if defined (OCTAVE_ENABLE_LIB_VISIBILITY_FLAGS)
-#  if defined (_WIN32) || defined (__CYGWIN__)
-#    if defined (__GNUC__)
-       /* GCC */
-#      define OCTAVE_EXPORT __attribute__ ((dllexport))
-#      define OCTAVE_IMPORT __attribute__ ((dllimport))
-#    else
-       /* MSVC */
-#      define OCTAVE_EXPORT __declspec(dllexport)
-#      define OCTAVE_IMPORT __declspec(dllimport)
-#    endif
-#  else
-     /* All other platforms. */
-#    define OCTAVE_EXPORT __attribute__ ((visibility ("default")))
-#    define OCTAVE_IMPORT
-#  endif
-#else
-#  define OCTAVE_EXPORT
-#  define OCTAVE_IMPORT
-#endif
-
-/* API macro for liboctave */
-#if defined (OCTAVE_DLL)
-#  define OCTAVE_API OCTAVE_EXPORT
-#else
-#  define OCTAVE_API OCTAVE_IMPORT
-#endif
-
-/* API macro for liboctinterp */
-#if defined (OCTINTERP_DLL)
-#  define OCTINTERP_API OCTAVE_EXPORT
-#else
-#  define OCTINTERP_API OCTAVE_IMPORT
-#endif
-
-/* API macro for the Array class in liboctave and liboctinterp */
-#if (defined (OCTAVE_DLL) || defined (OCTINTERP_DLL))
-#  define OCTARRAY_API OCTAVE_EXPORT
-#else
-#  define OCTARRAY_API OCTAVE_IMPORT
-#endif
-
-/* API macro for libinterp/graphics */
-#if defined (OCTGRAPHICS_DLL)
-#  define OCTGRAPHICS_API OCTAVE_EXPORT
-#else
-#  define OCTGRAPHICS_API OCTAVE_IMPORT
-#endif
-
-/* API macro for libgui */
-#if defined (OCTGUI_DLL)
-#  define OCTGUI_API OCTAVE_EXPORT
-#else
-#  define OCTGUI_API OCTAVE_IMPORT
-#endif
-
-/* Backward compatibility */
-
-#if defined (OCTAVE_ENABLE_64)
-#  define USE_64_BIT_IDX_T 1
-#endif
-
-#if defined (OCTAVE_ENABLE_OPENMP)
-#  define HAVE_OPENMP 1
-#endif
-
-#if defined (OCTAVE_ENABLE_FLOAT_TRUNCATE)
-#  define OCTAVE_FLOAT_TRUNCATE volatile
-#else
-#  define OCTAVE_FLOAT_TRUNCATE
-#endif
-
-#if defined (__cplusplus)
-#  include <cinttypes>
-#else
-#  include <inttypes.h>
-#endif
-
-typedef OCTAVE_IDX_TYPE octave_idx_type;
-
-#if defined (OCTAVE_ENABLE_64)
-#  define OCTAVE_IDX_TYPE_FORMAT PRId64
-#else
-#  define OCTAVE_IDX_TYPE_FORMAT PRId32
-#endif
-
-typedef OCTAVE_F77_INT_TYPE octave_f77_int_type;
-
-#if OCTAVE_SIZEOF_F77_INT_TYPE == 8
-#  define OCTAVE_F77_INT_TYPE_FORMAT PRId64
-#else
-#  define OCTAVE_F77_INT_TYPE_FORMAT PRId32
-#endif
-
-#define OCTAVE_HAVE_F77_INT_TYPE 1
-
-/* time type in API is always 64 bits wide */
-#define OCTAVE_TIME_T int64_t
-
-#if defined (__cplusplus) && ! defined (OCTAVE_THREAD_LOCAL)
-#  define OCTAVE_THREAD_LOCAL
-#endif
-
-/* Make all .oct file interpreter functions and methods static.  */
-#define OCTAVE_USE_STATIC_DEFUN
-
-/* Tag indicating Octave's autoconf-generated config.h has been
-   included.  This symbol is provided because autoconf-generated
-   config.h files do not define a multiple-inclusion guard.  See also
-   the notes at the top of the generated octave-config.h file.  */
-
-#define OCTAVE_AUTOCONFIG_H_INCLUDED 1
--- a/scripts/+containers/Map.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/+containers/Map.m	Mon Aug 29 13:58:00 2022 +0200
@@ -305,6 +305,7 @@
 
       ## -*- texinfo -*-
       ## @deftypefn {} {} Map.remove (@var{keySet})
+      ## @deftypefn {} {@var{newMap) =} Map.remove (@var{keySet})
       ## Remove the list of key/value pairs specified by a cell array of keys
       ## @var{keySet} from the map.
       ##
--- a/scripts/@ftp/ascii.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/@ftp/ascii.m	Mon Aug 29 13:58:00 2022 +0200
@@ -32,6 +32,7 @@
 ## representation.
 ##
 ## @var{f} is an FTP object returned by the @code{ftp} function.
+## @seealso{@ftp/binary, @ftp/ftp}
 ## @end deftypefn
 
 function ascii (f)
--- a/scripts/@ftp/binary.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/@ftp/binary.m	Mon Aug 29 13:58:00 2022 +0200
@@ -31,6 +31,7 @@
 ## representation to the local representation.
 ##
 ## @var{f} is an FTP object returned by the @code{ftp} function.
+## @seealso{@ftp/ascii, @ftp/ftp}
 ## @end deftypefn
 
 function binary (f)
--- a/scripts/@ftp/cd.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/@ftp/cd.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,9 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} cd (@var{f})
+## @deftypefn  {} {@var{cwd} =} cd (@var{f})
 ## @deftypefnx {} {} cd (@var{f}, @var{path})
+## @deftypefnx {} {@var{new_cwd} =} cd (@var{f}, @var{path})
 ## Get or set the remote directory on the FTP connection @var{f}.
 ##
 ## @var{f} is an FTP object returned by the @code{ftp} function.
@@ -36,14 +37,11 @@
 ##
 ## If the directory does not exist, an error message is printed and the
 ## working directory is not changed.
+## @seealso{@ftp/dir, @ftp/ftp}
 ## @end deftypefn
 
 function path = cd (f, path)
 
-  if (nargin < 1)
-    print_usage ();
-  endif
-
   if (nargin == 2)
     __ftp_cwd__ (f.curlhandle, path);
   endif
--- a/scripts/@ftp/close.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/@ftp/close.m	Mon Aug 29 13:58:00 2022 +0200
@@ -28,6 +28,7 @@
 ## Close the FTP connection represented by the FTP object @var{f}.
 ##
 ## @var{f} is an FTP object returned by the @code{ftp} function.
+## @seealso{@ftp/ftp}
 ## @end deftypefn
 
 function close (f)
--- a/scripts/@ftp/delete.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/@ftp/delete.m	Mon Aug 29 13:58:00 2022 +0200
@@ -28,6 +28,7 @@
 ## Delete the remote file @var{file} over the FTP connection @var{f}.
 ##
 ## @var{f} is an FTP object returned by the @code{ftp} function.
+## @seealso{@ftp/rmdir, @ftp/rename, @ftp/ftp}
 ## @end deftypefn
 
 function delete (f, file)
--- a/scripts/@ftp/dir.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/@ftp/dir.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,10 +24,16 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {@var{lst} =} dir (@var{f})
+## @deftypefn  {} {} dir (@var{f})
+## @deftypefnx {} {@var{lst} =} dir (@var{f})
 ## List the current directory in verbose form for the FTP connection @var{f}.
 ##
 ## @var{f} is an FTP object returned by the @code{ftp} function.
+##
+## If the optional output @var{lst} is requested return a struct array
+## with one entry per file with the fields @code{name}, @code{date},
+## @code{bytes}, @code{isdir}, @code{datenum}.
+## @seealso{@ftp/cd, @ftp/mkdir, @ftp/rmdir, @ftp/ftp}
 ## @end deftypefn
 
 function lst = dir (f)
--- a/scripts/@ftp/disp.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/@ftp/disp.m	Mon Aug 29 13:58:00 2022 +0200
@@ -25,10 +25,6 @@
 
 function disp (obj)
 
-  if (nargin < 1)
-    print_usage ();
-  endif
-
   printf ("  FTP object\n");
   printf ("    host: %s\n", obj.host);
   printf ("    user: %s\n", obj.username);
--- a/scripts/@ftp/ftp.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/@ftp/ftp.m	Mon Aug 29 13:58:00 2022 +0200
@@ -50,6 +50,8 @@
 ## @item rmdir @tab Remove remote directory
 ## @end multitable
 ##
+## @seealso{@ftp/ascii, @ftp/binary, @ftp/cd, @ftp/close, @ftp/delete,
+## @ftp/dir, @ftp/mget, @ftp/mkdir, @ftp/mput, @ftp/rename, @ftp/rmdir}
 ## @end deftypefn
 
 function obj = ftp (host = "", username = "anonymous", password = "")
--- a/scripts/@ftp/mget.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/@ftp/mget.m	Mon Aug 29 13:58:00 2022 +0200
@@ -38,6 +38,7 @@
 ## If a third string argument @var{target} is given, then it must indicate
 ## the path to the local destination directory.  @var{target} may be a
 ## relative or absolute path.
+## @seealso{@ftp/mput, @ftp/ftp}
 ## @end deftypefn
 
 function mget (f, file, target = "")
--- a/scripts/@ftp/mkdir.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/@ftp/mkdir.m	Mon Aug 29 13:58:00 2022 +0200
@@ -28,6 +28,7 @@
 ## Create the remote directory @var{path}, over the FTP connection @var{f}.
 ##
 ## @var{f} is an FTP object returned by the @code{ftp} function.
+## @seealso{@ftp/rmdir, @ftp/ftp}
 ## @end deftypefn
 
 function mkdir (f, path)
--- a/scripts/@ftp/mput.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/@ftp/mput.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,14 +24,19 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} mput (@var{f}, @var{file})
+## @deftypefn  {} {} mput (@var{f}, @var{file})
+## @deftypefnx {} {@var{file_list} =} mput (@var{f}, @var{file})
 ## Upload the local file @var{file} into the current remote directory on the
 ## FTP connection @var{f}.
 ##
-## @var{f} is an FTP object returned by the ftp function.
+## @var{f} is an FTP object returned by the @code{ftp} function.
 ##
 ## The argument @var{file} is passed through the @code{glob} function and any
 ## files that match the wildcards in @var{file} will be uploaded.
+##
+## The optional output argument @var{file_list} contains a cell array of
+## strings with the names of the uploaded files.
+## @seealso{@ftp/mget, @ftp/mkdir, @ftp/ftp}
 ## @end deftypefn
 
 function retval = mput (f, file)
--- a/scripts/@ftp/rename.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/@ftp/rename.m	Mon Aug 29 13:58:00 2022 +0200
@@ -28,7 +28,8 @@
 ## Rename or move the remote file or directory @var{oldname} to @var{newname},
 ## over the FTP connection @var{f}.
 ##
-## @var{f} is an FTP object returned by the ftp function.
+## @var{f} is an FTP object returned by the @code{ftp} function.
+## @seealso{@ftp/delete, @ftp/rmdir, @ftp/ftp}
 ## @end deftypefn
 
 function rename (f, oldname, newname)
--- a/scripts/@ftp/rmdir.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/@ftp/rmdir.m	Mon Aug 29 13:58:00 2022 +0200
@@ -28,6 +28,7 @@
 ## Remove the remote directory @var{path}, over the FTP connection @var{f}.
 ##
 ## @var{f} is an FTP object returned by the @code{ftp} function.
+## @seealso{@ftp/delete, @ftp/mkdir, @ftp/rename, @ftp/ftp}
 ## @end deftypefn
 
 function rmdir (f, path)
--- a/scripts/audio/@audioplayer/__get_properties__.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/audio/@audioplayer/__get_properties__.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,51 +24,44 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {@var{properties} =} __get_properties__ (@var{player})
+## @deftypefn {} {@var{props} =} __get_properties__ (@var{player})
 ## Return a struct containing all named properties of the audioplayer object
 ## @var{player}.
+## @seealso{@audioplayer/get, @audioplayer/set, @audioplayer/audioplayer}
 ## @end deftypefn
 
 function props = __get_properties__ (player)
 
-  if (nargin < 1)
-    print_usage ();
-  endif
-
-  if (__player_isplaying__ (struct (player).player))
-    running = "on";
-  else
-    running = "off";
-  endif
+  hplayer = struct (player).player;
 
   props = struct ("BitsPerSample",
-                  __player_get_nbits__ (struct (player).player),
+                  __player_get_nbits__ (hplayer),
 
                   "CurrentSample",
-                  __player_get_sample_number__ (struct (player).player),
+                  __player_get_sample_number__ (hplayer),
 
                   "DeviceID",
-                  __player_get_id__ (struct (player).player),
+                  __player_get_id__ (hplayer),
 
                   "NumberOfChannels",
-                  __player_get_channels__ (struct (player).player),
+                  __player_get_channels__ (hplayer),
 
                   "Running",
-                  running,
+                  ifelse (__player_isplaying__ (hplayer), "on", "off"),
 
                   "SampleRate",
-                  __player_get_fs__ (struct (player).player),
+                  __player_get_fs__ (hplayer),
 
                   "TotalSamples",
-                  __player_get_total_samples__ (struct (player).player),
+                  __player_get_total_samples__ (hplayer),
 
                   "Tag",
-                  __player_get_tag__ (struct (player).player),
+                  __player_get_tag__ (hplayer),
 
                   "Type",
                   "audioplayer",
 
                   "UserData",
-                  __player_get_userdata__ (struct (player).player));
+                  __player_get_userdata__ (hplayer));
 
 endfunction
--- a/scripts/audio/@audioplayer/audioplayer.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/audio/@audioplayer/audioplayer.m	Mon Aug 29 13:58:00 2022 +0200
@@ -32,16 +32,35 @@
 ## Create an audioplayer object that will play back data @var{y} at sample
 ## rate @var{fs}.
 ##
-## The optional arguments @var{nbits}, and @var{id} specify the bit depth and
-## player device id, respectively.  Device IDs may be found using the
-## audiodevinfo function.  Given an audioplayer object, use the data from the
-## object to initialize the player.
+## The signal @var{y} can be a vector (mono audio) or a two-dimensional array
+## (multi-channel audio).
+##
+## The optional arguments @var{nbits} and @var{id} specify the number of bits
+## per sample and player device ID, respectively.  Device IDs may be found
+## using the @code{audiodevinfo} function.
+##
+## Given an audiorecorder object @var{recorder}, use the data from the object
+## to initialize the player.
+##
+## The list of actions for an audioplayer object are shown below.  All
+## methods require an audioplayer object as the first argument.
 ##
-## The signal @var{y} can be a vector or a two-dimensional array.
+## @multitable @columnfractions 0.2 0.75
+## @headitem Method @tab Description
+## @item get @tab Read audioplayer property values
+## @item isplaying @tab Return true if audioplayer is playing
+## @item pause @tab Pause audioplayer playback
+## @item play @tab Play audio stored in audioplayer object w/o blocking
+## @item playblocking @tab Play audio stored in audioplayer object
+## @item resume @tab Resume playback after pause
+## @item set @tab Write audioplayer property values
+## @item stop @tab Stop playback
+## @end multitable
 ##
-## The following example will create an audioplayer object that will play
-## back one second of white noise at 44100 sample rate using 8 bits per
-## sample.
+## Example
+##
+## Create an audioplayer object that will play back one second of white noise
+## at 44100 sample rate using 8 bits per sample.
 ##
 ## @example
 ## @group
@@ -50,8 +69,13 @@
 ## play (player);
 ## @end group
 ## @end example
+## @seealso{@audioplayer/get, @audioplayer/isplaying, @audioplayer/pause,
+## @audioplayer/play, @audioplayer/playblocking, @audioplayer/resume,
+## @audioplayer/set, @audioplayer/stop, audiodevinfo,
+## @audiorecorder/audiorecorder, sound, soundsc}
 ## @end deftypefn
 
+################################################################################
 ## FIXME: callbacks don't work properly, apparently because portaudio
 ## will execute the callbacks in a separate thread, and calling Octave
 ## functions in a separate thread which is likely to cause trouble with
@@ -85,6 +109,7 @@
 ## # play for as long as you want
 ## stop (player);
 ## @end group
+################################################################################
 
 function player = audioplayer (varargin)
 
@@ -100,15 +125,22 @@
     elseif (nargin == 2)
       recorder = varargin{1};
       data = getaudiodata (recorder);
-      player = audioplayer (data, get (recorder, "SampleRate"),
-                            get (recorder, "BitsPerSample"), varargin{2});
+      player = audioplayer (data,
+                            get (recorder, "SampleRate"),
+                            get (recorder, "BitsPerSample"),
+                            varargin{2});
     else
       print_usage ();
     endif
   else
-    if (ischar (varargin{1}))
-      varargin{1} = str2func (varargin{1});
+    ## FIXME: Prevent use of callbacks until situation is fixed.
+    if (is_function_handle (varargin{1}) || ischar (varargin{1}))
+      error ("audioplayer: first argument cannot be a callback function");
     endif
+    ## FIXME: Uncomment when callback functions are supported.
+    ## if (ischar (varargin{1}))
+    ##   varargin{1} = str2func (varargin{1});
+    ## endif
     player.player = __player_audioplayer__ (varargin{:});
     player = class (player, "audioplayer");
   endif
@@ -117,6 +149,7 @@
 
 
 %!demo
+%! ## Generate 2 seconds of white noise and play it back with a pause
 %! fs = 44100;
 %! audio = 0.25 * randn (2, 2*fs);
 %! player = audioplayer (audio, fs);
@@ -144,37 +177,34 @@
 %! assert (player2.TotalSamples, 44100);
 
 %!testif HAVE_PORTAUDIO; audiodevinfo (0) > 0
-%! audio = 0.25 * randn (2, 44100);
-%! fs = 44100;
-%! player = audioplayer (audio, fs);
-%! set (player, {"SampleRate", "Tag", "UserData"}, {8000, "tag", [1, 2; 3, 4]});
-%! assert (player.SampleRate, 8000);
-%! assert (player.Tag, "tag");
-%! assert (player.UserData, [1, 2; 3, 4]);
-
-%!testif HAVE_PORTAUDIO; audiodevinfo (0) > 0
-%! audio = 0.25 * randn (2, 44100);
+%! audio = randn (8000, 1);
 %! fs = 44100;
-%! player = audioplayer (audio, fs);
-%! settable = set (player);
-%! settable.SampleRate = 8000;
-%! settable.Tag = "tag";
-%! settable.UserData = [1, 2; 3, 4];
-%! set (player, settable);
-%! assert (player.SampleRate, 8000);
-%! assert (player.Tag, "tag");
-%! assert (player.UserData, [1, 2; 3, 4]);
+%! player = audioplayer (audio, fs, 16);
+%! assert (player.NumberOfChannels, 1);
+%! assert (player.SampleRate, 44100);
+%! assert (player.BitsPerSample, 16);
+
+## FIXME: Callbacks do not work currently (5/31/2020) so BIST tests commented.
+%!#function [sound, status] = callback (samples)
+%!#  sound = rand (samples, 2) - 0.5;
+%!#  status = 0;
+%!#endfunction
 
-%!testif HAVE_PORTAUDIO; audiodevinfo (0) > 0
-%! audio = 0.25 * randn (2, 44100);
-%! fs = 44100;
-%! player = audioplayer (audio, fs);
-%! player.SampleRate = 8000;
-%! player.Tag = "tag";
-%! player.UserData = [1, 2; 3, 4];
-%! properties = get (player, {"SampleRate", "Tag", "UserData"});
-%! assert (properties, {8000, "tag", [1, 2; 3, 4]});
+%!#testif HAVE_PORTAUDIO
+%!# player = audioplayer (@callback, 44100);
+%!# play (player);
+%!# pause (2);
+%!# stop (player);
+%!# assert (1);
 
+%!#testif HAVE_PORTAUDIO
+%!# player = audioplayer ("callback", 44100, 16);
+%!# play (player);
+%!# pause (2);
+%!# stop (player);
+%!# assert (1);
+
+## Verify input validation
 %!testif HAVE_PORTAUDIO; audiodevinfo (0) > 0
 %! ## Verify nbits option only accepts 8, 16, 24
 %! fail ("audioplayer (1, 8e3, 9)", "NBITS must be 8, 16, or 24");
@@ -183,22 +213,5 @@
 %! player = audioplayer (1, 8e3, 16);
 %! player = audioplayer (1, 8e3, 24);
 
-## FIXME: Callbacks do not work currently (5/31/2020) so BIST tests commented.
-#%!function [sound, status] = callback (samples)
-#%!  sound = rand (samples, 2) - 0.5;
-#%!  status = 0;
-#%!endfunction
-
-#%!testif HAVE_PORTAUDIO
-#%! player = audioplayer (@callback, 44100);
-#%! play (player);
-#%! pause (2);
-#%! stop (player);
-#%! assert (1);
-
-#%!testif HAVE_PORTAUDIO
-#%! player = audioplayer ("callback", 44100, 16);
-#%! play (player);
-#%! pause (2);
-#%! stop (player);
-#%! assert (1);
+%!error <first argument cannot be a callback> audioplayer (@ls, 8000)
+%!error <first argument cannot be a callback> audioplayer ("ls", 8000)
--- a/scripts/audio/@audioplayer/disp.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/audio/@audioplayer/disp.m	Mon Aug 29 13:58:00 2022 +0200
@@ -26,17 +26,18 @@
 ## -*- texinfo -*-
 ## @deftypefn {} {} disp (@var{player})
 ## Display the properties of the audioplayer object @var{player}.
+## @seealso{@audioplayer/audioplayer}
 ## @end deftypefn
 
 function disp (player)
 
-  if (nargin < 1)
-    print_usage ();
-  endif
-
   printf ("audioplayer object with properties:\n\n");
   for [val, prop] = __get_properties__ (player)
     printf ("  %s = ", prop), disp (val);
   endfor
 
 endfunction
+
+
+## No tests possible/needed for this function
+%!assert (1)
--- a/scripts/audio/@audioplayer/get.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/audio/@audioplayer/get.m	Mon Aug 29 13:58:00 2022 +0200
@@ -25,38 +25,74 @@
 
 ## -*- texinfo -*-
 ## @deftypefn  {} {@var{value} =} get (@var{player}, @var{name})
+## @deftypefnx {} {@var{values} =} get (@var{player}, @lbracechar{}@var{name1}, @var{name2}, @dots{}@rbracechar{})
 ## @deftypefnx {} {@var{values} =} get (@var{player})
 ## Return the @var{value} of the property identified by @var{name}.
 ##
 ## If @var{name} is a cell array return the values of the properties
 ## identified by the elements of the cell array.  Given only the player
-## object, return a scalar structure with values of all properties of
-## @var{player}.  The field names of the structure correspond to property
+## object, return a scalar structure with values for all properties of
+## @var{player}.  The field names of the structure correspond to the property
 ## names.
+## @seealso{@audioplayer/set, @audioplayer/audioplayer}
 ## @end deftypefn
 
-function retval = get (varargin)
+function value = get (player, name)
 
-  if (nargin < 1 || nargin > 2)
-    print_usage ();
-  endif
-
-  properties = __get_properties__ (varargin{1});
+  properties = __get_properties__ (player);
 
   if (nargin == 1)
-    retval = properties;
+    value = properties;
   elseif (nargin == 2)
-    pnames = varargin{2};
+    pnames = name;
     if (ischar (pnames))
-      retval = getfield (properties, pnames);
+      value = getproperty (properties, pnames);
     elseif (iscellstr (pnames))
-      retval = cell (size (pnames));
+      value = cell (size (pnames));
       for i = 1:numel (pnames)
-        retval{i} = getfield (properties, pnames{i});
+        value{i} = getproperty (properties, pnames{i});
       endfor
     else
-      error ("@audioplayer/get: invalid NAME argument");
+      error ("@audioplayer/get: NAME must be a string or cell array of strings");
     endif
   endif
 
 endfunction
+
+function value = getproperty (properties, pname)
+
+  persistent valid_props;
+  if (isempty (valid_props))
+    valid_props = { "BitsPerSample", "CurrentSample", "DeviceID", ...
+                    "NumberOfChannels", "Running", "SampleRate", ...
+                    "TotalSamples", "Tag", "Type", "UserData" };
+  endif
+
+  idx = find (strcmpi (pname, valid_props), 1);
+  if (isempty (idx))
+    error ('@audioplayer/get: "%s" is not a valid property name', pname);
+  endif
+
+  value = properties.(valid_props{idx});
+
+endfunction
+
+
+%!testif HAVE_PORTAUDIO; audiodevinfo (0) > 0
+%! player = audioplayer ([-1, 1], 44100, 8);
+%! props = get (player);
+%! assert (fieldnames (props), {"BitsPerSample"; "CurrentSample"; "DeviceID";
+%!         "NumberOfChannels"; "Running"; "SampleRate"; "TotalSamples"; "Tag";
+%!         "Type"; "UserData"});
+%! value = get (player, "Running");
+%! assert (value, "off");
+%! value = get (player, "ruNNIng");  # test case insensitivity
+%! assert (value, "off");
+%! values = get (player, {"SampleRate", "BitsPerSample", "TotalSamples"});
+%! assert (values, {44100, 8, 2});
+
+## Test input validation
+%!testif HAVE_PORTAUDIO; audiodevinfo (0) > 0
+%! player = audioplayer ([-1, 1], 44100, 8);
+%! fail ("get (player, 1)", "NAME must be a string");
+%! fail ('get (player, "foobar")', '"foobar" is not a valid property');
--- a/scripts/audio/@audioplayer/isplaying.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/audio/@audioplayer/isplaying.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,17 +24,19 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} isplaying (@var{player})
+## @deftypefn {} {@var{tf} =} isplaying (@var{player})
 ## Return true if the audioplayer object @var{player} is currently playing back
 ## audio and false otherwise.
+## @seealso{@audioplayer/pause, @audioplayer/audioplayer}
 ## @end deftypefn
 
-function result = isplaying (player)
+function tf = isplaying (player)
 
-  if (nargin < 1)
-    print_usage ();
-  endif
-
-  result = __player_isplaying__ (struct (player).player);
+  tf = __player_isplaying__ (struct (player).player);
 
 endfunction
+
+
+%!testif HAVE_PORTAUDIO; audiodevinfo (1) > 0
+%! player = audioplayer ([-1, 1], 44100, 8);
+%! assert (isplaying (player), false);
--- a/scripts/audio/@audioplayer/pause.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/audio/@audioplayer/pause.m	Mon Aug 29 13:58:00 2022 +0200
@@ -25,15 +25,16 @@
 
 ## -*- texinfo -*-
 ## @deftypefn {} {} pause (@var{player})
-## Pause the audioplayer @var{player}.
+## Pause playback of audioplayer @var{player}.
+## @seealso{@audioplayer/resume, @audioplayer/stop, @audioplayer/audioplayer}
 ## @end deftypefn
 
 function pause (player)
 
-  if (nargin < 1)
-    print_usage ();
-  endif
-
   __player_pause__ (struct (player).player);
 
 endfunction
+
+
+## No tests possible for this function
+%!assert (1)
--- a/scripts/audio/@audioplayer/play.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/audio/@audioplayer/play.m	Mon Aug 29 13:58:00 2022 +0200
@@ -26,20 +26,30 @@
 ## -*- texinfo -*-
 ## @deftypefn  {} {} play (@var{player})
 ## @deftypefnx {} {} play (@var{player}, @var{start})
-## @deftypefnx {} {} play (@var{player}, @var{limits})
+## @deftypefnx {} {} play (@var{player}, [@var{start}, @var{end}])
 ## Play audio stored in the audioplayer object @var{player} without blocking.
 ##
-## Given optional argument start, begin playing at @var{start} samples in the
-## recording.  Given a two-element vector @var{limits}, begin and end playing
-## at the number of samples specified by the elements of the vector.
+## If the optional argument @var{start} is provided, begin playing
+## @var{start} samples in to the recording.
+##
+## If the optional argument @var{end} is provided, stop playing at
+## @var{end} samples into the recording.
+## @seealso{@audioplayer/playblocking, @audioplayer/pause, @audioplayer/stop,
+## @audioplayer/audioplayer}
 ## @end deftypefn
 
-function play (varargin)
+function play (player, length)
+
+  hplayer = struct (player).player;
 
-  if (nargin < 1 || nargin > 2)
-    print_usage ();
+  if (nargin == 1)
+    __player_play__ (hplayer);
+  else
+    __player_play__ (hplayer, length);
   endif
 
-  __player_play__ (struct (varargin{1}).player, varargin{2:end});
+endfunction
+
 
-endfunction
+## No tests possible for this function
+%!assert (1)
--- a/scripts/audio/@audioplayer/playblocking.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/audio/@audioplayer/playblocking.m	Mon Aug 29 13:58:00 2022 +0200
@@ -26,20 +26,29 @@
 ## -*- texinfo -*-
 ## @deftypefn  {} {} playblocking (@var{player})
 ## @deftypefnx {} {} playblocking (@var{player}, @var{start})
-## @deftypefnx {} {} playblocking (@var{player}, @var{limits})
-## Play audio stored in the audioplayer object @var{player} with blocking.
+## @deftypefnx {} {} playblocking (@var{player}, [@var{start}, @var{end}])
+## Play audio stored in the audioplayer object @var{player} with blocking
+## (synchronous I/O).
 ##
-## Given optional argument start, begin playing at @var{start} samples in the
-## recording.  Given a two-element vector @var{limits}, begin and end playing
-## at the number of samples specified by the elements of the vector.
+## If the optional argument @var{start} is provided, begin playing
+## @var{start} samples into the recording.
+##
+## If the optional argument @var{end} is provided, stop playing at
+## @var{end} samples into the recording.
+## @seealso{@audioplayer/play, @audioplayer/pause, @audioplayer/stop,
+## @audioplayer/audioplayer}
 ## @end deftypefn
 
-function playblocking (varargin)
+function playblocking (player, length)
 
-  if (nargin < 1 || nargin > 2)
+  if (nargin != 2)
     print_usage ();
   endif
 
-  __player_playblocking__ (struct (varargin{1}).player, varargin{2:end});
+  __player_playblocking__ (struct (player).player, length);
 
 endfunction
+
+
+## No tests possible for this function
+%!assert (1)
--- a/scripts/audio/@audioplayer/resume.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/audio/@audioplayer/resume.m	Mon Aug 29 13:58:00 2022 +0200
@@ -26,14 +26,15 @@
 ## -*- texinfo -*-
 ## @deftypefn {} {} resume (@var{player})
 ## Resume playback for the paused audioplayer object @var{player}.
+## @seealso{@audioplayer/pause, @audioplayer/stop, @audioplayer/audioplayer}
 ## @end deftypefn
 
 function resume (player)
 
-  if (nargin < 1)
-    print_usage ();
-  endif
-
   __player_resume__ (struct (player).player);
 
 endfunction
+
+
+## No tests possible for this function
+%!assert (1)
--- a/scripts/audio/@audioplayer/set.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/audio/@audioplayer/set.m	Mon Aug 29 13:58:00 2022 +0200
@@ -25,60 +25,94 @@
 
 ## -*- texinfo -*-
 ## @deftypefn  {} {} set (@var{player}, @var{name}, @var{value})
-## @deftypefnx {} {} set (@var{player}, @var{properties})
+## @deftypefnx {} {} set (@var{player}, @var{name_cell}, @var{value_cell})
+## @deftypefnx {} {} set (@var{player}, @var{properties_struct})
 ## @deftypefnx {} {@var{properties} =} set (@var{player})
 ## Set the value of property specified by @var{name} to a given @var{value}.
 ##
 ## If @var{name} and @var{value} are cell arrays, set each property to the
-## corresponding value.  Given a structure of @var{properties} with fields
+## corresponding value.  Given a structure of properties with fields
 ## corresponding to property names, set the value of those properties to the
-## field values.  Given only the audioplayer object, return a structure of
-## settable properties.
+## corresponding field values.  Given only an audioplayer object, return a
+## structure of configurable properties (i.e., writeable properties).
+## @seealso{@audioplayer/get, @audioplayer/audioplayer}
 ## @end deftypefn
 
-function settable = set (varargin)
+function properties = set (player, varargin)
 
-  if (nargin < 1 || nargin > 3)
+  if (nargin > 3)
     print_usage ();
   endif
 
-  player = struct (varargin{1}).player;
+  hplayer = struct (player).player;
 
   if (nargin == 1)
-    settable.SampleRate = {};
-    settable.Tag = {};
-    settable.UserData = {};
+    properties = struct ("SampleRate", {{}}, "Tag", {{}}, "UserData", {{}});
   elseif (nargin == 2)
-    for [value, property] = varargin{2}
-      setproperty (player, property, value);
+    for [value, property] = varargin{1}
+      setproperty (hplayer, property, value);
     endfor
   elseif (nargin == 3)
-    if (iscell (varargin{2}))
+    if (iscell (varargin{1}))
       index = 1;
-      for property = varargin{2}
-        setproperty (player, char (property), varargin{3}{index});
+      for property = varargin{1}
+        setproperty (hplayer, char (property), varargin{2}{index});
         index += 1;
       endfor
     else
-      setproperty (player, varargin{2}, varargin{3});
+      setproperty (hplayer, varargin{1}, varargin{2});
     endif
-  else
-    error ("@audioplayer/set: wrong number of arguments to the set method");
   endif
 
 endfunction
 
 function setproperty (player, property, value)
 
-  switch (property)
-    case "SampleRate"
+  switch (lower (property))
+    case "samplerate"
       __player_set_fs__ (player, value);
-    case "Tag"
+    case "tag"
       __player_set_tag__ (player, value);
-    case "UserData"
+    case "userdata"
       __player_set_userdata__ (player, value);
     otherwise
-      error ("audioplayer: no such property or the property specified is read-only");
+      error ('@audioplayer/set: "%s" is not a valid property name or is read-only', property);
   endswitch
 
 endfunction
+
+
+%!testif HAVE_PORTAUDIO; audiodevinfo (0) > 0
+%! player = audioplayer ([-1, 1], 44100, 8);
+%! set (player, "SampleRate", 8800);
+%! set (player, "Tag", "mytag");
+%! ## Also test case insensitivity
+%! set (player, "USERdata", [1, 2; 3, 4]);
+%! assert (player.SampleRate, 8800);
+%! assert (player.Tag, "mytag");
+%! assert (player.UserData, [1, 2; 3, 4]);
+
+%!testif HAVE_PORTAUDIO; audiodevinfo (0) > 0
+%! player = audioplayer ([-1, 1], 44100, 8);
+%! set (player, {"SampleRate", "Tag", "UserData"},
+%!              {8800, "mytag", [1, 2; 3, 4]});
+%! assert (player.SampleRate, 8800);
+%! assert (player.Tag, "mytag");
+%! assert (player.UserData, [1, 2; 3, 4]);
+
+%!testif HAVE_PORTAUDIO; audiodevinfo (0) > 0
+%! player = audioplayer ([-1, 1], 44100, 8);
+%! props = set (player);
+%! props.SampleRate = 8800;
+%! props.Tag = "mytag";
+%! props.UserData = [1, 2; 3, 4];
+%! set (player, props);
+%! assert (player.SampleRate, 8800);
+%! assert (player.Tag, "mytag");
+%! assert (player.UserData, [1, 2; 3, 4]);
+
+## Test input validation
+%!testif HAVE_PORTAUDIO; audiodevinfo (0) > 0
+%! player = audioplayer ([-1, 1], 44100, 8);
+%! fail ('set (player, "foobar", 1)', "not a valid property name"); 
+%! fail ('set (player, "Running", 1)', "is read-only"); 
--- a/scripts/audio/@audioplayer/stop.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/audio/@audioplayer/stop.m	Mon Aug 29 13:58:00 2022 +0200
@@ -25,16 +25,17 @@
 
 ## -*- texinfo -*-
 ## @deftypefn {} {} stop (@var{player})
-## Stop the playback for the audioplayer @var{player} and reset the
-## relevant variables to their starting values.
+## Stop playback of the audioplayer @var{player} and reset relevant variables
+## to their initial values.
+## @seealso{@audioplayer/pause, @audioplayer/resume, @audioplayer/audioplayer}
 ## @end deftypefn
 
 function stop (player)
 
-  if (nargin < 1)
-    print_usage ();
-  endif
-
   __player_stop__ (struct (player).player);
 
 endfunction
+
+
+## No tests possible for this function
+%!assert (1)
--- a/scripts/audio/@audioplayer/subsasgn.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/audio/@audioplayer/subsasgn.m	Mon Aug 29 13:58:00 2022 +0200
@@ -28,10 +28,15 @@
 ## Perform subscripted assignment on the audio player object @var{player}.
 ##
 ## Assign the value of @var{rhs} to the player property named by @var{idx}.
+## @seealso{@audioplayer/audioplayer}
 ## @end deftypefn
 
 function value = subsasgn (player, idx, rhs)
 
+  if (nargin != 3)
+    print_usage ();
+  endif
+
   if (isempty (idx))
     error ("audioplayer: missing index");
   endif
@@ -45,3 +50,15 @@
   endif
 
 endfunction
+
+
+%!testif HAVE_PORTAUDIO; audiodevinfo (0) > 0
+%! player = audioplayer ([-1, 1], 44100, 8);
+%! player.Tag = "mytag";
+%! assert (get (player, "Tag"), "mytag");
+
+## Test input validation
+%!testif HAVE_PORTAUDIO; audiodevinfo (0) > 0
+%! player = audioplayer ([-1, 1], 44100, 8);
+%! fail ("player(1).Tag = 5", "invalid subscript type");
+%! fail ("player{1}.Tag = 5", "invalid subscript type");
--- a/scripts/audio/@audioplayer/subsref.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/audio/@audioplayer/subsref.m	Mon Aug 29 13:58:00 2022 +0200
@@ -28,6 +28,7 @@
 ## Perform subscripted selection on the audio player object @var{player}.
 ##
 ## Return the player property value named by @var{idx}.
+## @seealso{@audioplayer/audioplayer}
 ## @end deftypefn
 
 function value = subsref (player, idx)
@@ -48,3 +49,15 @@
   endif
 
 endfunction
+
+
+%!testif HAVE_PORTAUDIO; audiodevinfo (0) > 0
+%! player = audioplayer ([-1, 1], 44100, 8);
+%! set (player, "Tag", "mytag");
+%! assert (player.Tag, "mytag");
+
+## Test input validation
+%!testif HAVE_PORTAUDIO; audiodevinfo (0) > 0
+%! player = audioplayer ([-1, 1], 44100, 8);
+%! fail ("player(1).Tag", "invalid subscript type");
+%! fail ("player{1}.Tag", "invalid subscript type");
--- a/scripts/audio/@audiorecorder/__get_properties__.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/audio/@audiorecorder/__get_properties__.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,51 +24,45 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {@var{properties} =} __get_properties__ (@var{recorder})
+## @deftypefn {} {@var{props} =} __get_properties__ (@var{recorder})
 ## Return a struct containing all named properties of the recorder object
 ## @var{recorder}.
+## @seealso{@audiorecorder/get, @audiorecorder/set,
+## @audiorecorder/audiorecorder}
 ## @end deftypefn
 
 function props = __get_properties__ (recorder)
 
-  if (nargin < 1)
-    print_usage ();
-  endif
-
-  if (__recorder_isrecording__ (struct (recorder).recorder))
-    running = "on";
-  else
-    running = "off";
-  endif
+  hrecorder = struct (recorder).recorder;
 
   props = struct ("BitsPerSample",
-                  __recorder_get_nbits__ (struct (recorder).recorder),
+                  __recorder_get_nbits__ (hrecorder),
 
                   "CurrentSample",
-                  __recorder_get_sample_number__ (struct (recorder).recorder),
+                  __recorder_get_sample_number__ (hrecorder),
 
                   "DeviceID",
-                  __recorder_get_id__ (struct (recorder).recorder),
+                  __recorder_get_id__ (hrecorder),
 
                   "NumberOfChannels",
-                  __recorder_get_channels__ (struct (recorder).recorder),
+                  __recorder_get_channels__ (hrecorder),
 
                   "Running",
-                  running,
+                  ifelse (__recorder_isrecording__ (hrecorder), "on", "off"),
 
                   "SampleRate",
-                  __recorder_get_fs__ (struct (recorder).recorder),
+                  __recorder_get_fs__ (hrecorder),
 
                   "TotalSamples",
-                  __recorder_get_total_samples__ (struct (recorder).recorder),
+                  __recorder_get_total_samples__ (hrecorder),
 
                   "Tag",
-                  __recorder_get_tag__ (struct (recorder).recorder),
+                  __recorder_get_tag__ (hrecorder),
 
                   "Type",
                   "audiorecorder",
 
                   "UserData",
-                  __recorder_get_userdata__ (struct (recorder).recorder));
+                  __recorder_get_userdata__ (hrecorder));
 
 endfunction
--- a/scripts/audio/@audiorecorder/audiorecorder.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/audio/@audiorecorder/audiorecorder.m	Mon Aug 29 13:58:00 2022 +0200
@@ -25,25 +25,50 @@
 
 ## -*- texinfo -*-
 ## @deftypefn  {} {@var{recorder} =} audiorecorder ()
-## @deftypefnx {} {@var{recorder} =} audiorecorder (@var{fs}, @var{nbits}, @var{channels})
-## @deftypefnx {} {@var{recorder} =} audiorecorder (@var{fs}, @var{nbits}, @var{channels}, @var{id})
-## Create an audiorecorder object recording 8 bit mono audio at 8000 Hz
+## @deftypefnx {} {@var{recorder} =} audiorecorder (@var{fs}, @var{nbits}, @var{nchannels})
+## @deftypefnx {} {@var{recorder} =} audiorecorder (@var{fs}, @var{nbits}, @var{nchannels}, @var{id})
+## Create an audiorecorder object recording 8-bit mono audio at 8000 Hz
 ## sample rate.
 ##
-## The optional arguments @var{fs}, @var{nbits}, @var{channels}, and @var{id}
-## specify the sample rate, bit depth, number of channels and recording
-## device id, respectively.  Device IDs may be found using the audiodevinfo
-## function.
+## The optional arguments @var{fs}, @var{nbits}, @var{nchannels}, and @var{id}
+## specify the sample rate, number of bits per sample, number of channels, and
+## recording device ID, respectively.  Device IDs may be found using the
+## @code{audiodevinfo} function.
+##
+## The list of actions for an audiorecorder object are shown below.  All
+## methods require an audiorecorder object as the first argument.
+##
+## @multitable @columnfractions 0.22 0.73
+## @headitem Method @tab Description
+## @item get @tab Read audiorecorder property values
+## @item getaudiodata @tab Return audio data as a numeric matrix
+## @item getplayer @tab Return audioplayer loaded with data from audiorecorder
+## @item isrecording @tab Return true if audiorecorder is recording
+## @item pause @tab Pause recording
+## @item play @tab Play audio stored in audiorecorder object
+## @item record @tab Record audio in audiorecorder object w/o blocking
+## @item recordblocking @tab Record audio in audiorecorder object
+## @item resume @tab Resume recording after pause
+## @item set @tab Write audiorecorder property values
+## @item stop @tab Stop recording
+## @end multitable
 ## @end deftypefn
+## @seealso{@audiorecorder/get, @audiorecorder/getaudiodata,
+## @audiorecorder/getplayer, @audiorecorder/isrecording,
+## @audiorecorder/pause, @audiorecorder/play, @audiorecorder/record,
+## @audiorecorder/recordblocking, @audioplayer/resume, @audiorecorder/set,
+## @audiorecorder/stop, audiodevinfo, @audioplayer/audioplayer, record}
 
+################################################################################
 ## FIXME: callbacks don't work properly, apparently because portaudio
 ## will execute the callbacks in a separate thread, and calling Octave
-## functions in a separate thread which is likely to cause trouble with
+## functions in a separate thread is likely to cause trouble with
 ## all of Octave's global data...
 ##
 ## @deftypefnx {} {@var{recorder} =} audiorecorder (@var{function}, @dots{})
 ##
 ## Given a function handle, use that function to process the audio.
+################################################################################
 
 function recorder = audiorecorder (varargin)
 
@@ -51,9 +76,15 @@
     print_usage ();
   endif
 
-  if (nargin > 0 && ischar (varargin{1}))
-    varargin{1} = str2func (varargin{1});
+  ## FIXME: Prevent use of callbacks until situation is fixed.
+  if (nargin > 0 && (is_function_handle (varargin{1}) || ischar (varargin{1})))
+    error ("audiorecorder: first argument cannot be a callback function");
   endif
+  
+  ## FIXME: Uncomment when callback functions are supported.
+  ## if (nargin > 0 && ischar (varargin{1}))
+  ##   varargin{1} = str2func (varargin{1});
+  ## endif
 
   recorder.recorder = __recorder_audiorecorder__ (varargin{:});
   recorder = class (recorder, "audiorecorder");
@@ -62,6 +93,7 @@
 
 
 %!demo
+%! ## Record 1 second of audio and play it back in two ways
 %! recorder = audiorecorder (44100, 16, 2);
 %! record (recorder, 1);
 %! pause (2);
@@ -76,67 +108,34 @@
 
 ## Tests of audiorecorder must not actually record anything.
 
-%!testif HAVE_PORTAUDIO; audiodevinfo (1) > 0
-%! recorder = audiorecorder (44100, 16, 2);
-%! data = getaudiodata (recorder, "int16");
-%! assert (strcmp (class (data), "int16"));
-%! data = getaudiodata (recorder, "int8");
-%! assert (strcmp (class (data), "int8"));
-%! data = getaudiodata (recorder, "uint8");
-%! assert (strcmp (class (data), "uint8"));
-%! assert (size (data)(1), recorder.TotalSamples);
-%! assert (size (data)(2), 2);
-
-%!testif HAVE_PORTAUDIO; audiodevinfo (1) > 0
-%! recorder = audiorecorder ();
-%! set (recorder, {"SampleRate", "Tag", "UserData"},
-%!                {8000, "tag", [1, 2; 3, 4]});
-%! assert (recorder.SampleRate, 8000);
-%! assert (recorder.Tag, "tag");
-%! assert (recorder.UserData, [1, 2; 3, 4]);
-
-%!testif HAVE_PORTAUDIO; audiodevinfo (1) > 0
-%! recorder = audiorecorder ();
-%! settable = set (recorder);
-%! settable.SampleRate = 8000;
-%! settable.Tag = "tag";
-%! settable.UserData = [1, 2; 3, 4];
-%! set (recorder, settable);
-%! assert (recorder.SampleRate, 8000);
-%! assert (recorder.Tag, "tag");
-%! assert (recorder.UserData, [1, 2; 3, 4]);
+## FIXME: Uncomment when callbacks are supported
+%!#function status = callback_record (sound)
+%!#  fid = fopen ("record.txt", "at");
+%!#  for index = 1:rows(sound)
+%!#    fprintf (fid, "%.4f, %.4f\n", sound(index, 1), sound(index, 2));
+%!#  endfor
+%!#  fclose (fid);
+%!#  status = 0;
+%!#endfunction
 
-%!testif HAVE_PORTAUDIO; audiodevinfo (1) > 0
-%! recorder = audiorecorder ();
-%! recorder.SampleRate = 8000;
-%! recorder.Tag = "tag";
-%! recorder.UserData = [1, 2; 3, 4];
-%! properties = get (recorder, {"SampleRate", "Tag", "UserData"});
-%! assert (properties, {8000, "tag", [1, 2; 3, 4]});
-
-#%!function status = callback_record (sound)
-#%!  fid = fopen ("record.txt", "at");
-#%!  for index = 1:rows(sound)
-#%!    fprintf (fid, "%.4f, %.4f\n", sound(index, 1), sound(index, 2));
-#%!  endfor
-#%!  fclose (fid);
-#%!  status = 0;
-#%!endfunction
+%!#testif HAVE_PORTAUDIO
+%!# recorder = audiorecorder (@callback_record, 44100);
+%!# unlink ("record.txt")
+%!# record (recorder);
+%!# pause (2);
+%!# stop (recorder);
+%!# s = stat ("record.txt");
+%!# assert (s.size > 0);
 
-#%!testif HAVE_PORTAUDIO
-#%! recorder = audiorecorder (@callback_record, 44100);
-#%! unlink ("record.txt")
-#%! record (recorder);
-#%! pause (2);
-#%! stop (recorder);
-#%! s = stat ("record.txt");
-#%! assert (s.size > 0);
+%!#testif HAVE_PORTAUDIO
+%!# recorder = audiorecorder (@callback_record, 44100);
+%!# unlink ("record.txt")
+%!# record (recorder);
+%!# pause (2);
+%!# stop (recorder);
+%!# s = stat ("record.txt");
+%!# assert (s.size > 0);
 
-#%!testif HAVE_PORTAUDIO
-#%! recorder = audiorecorder (@callback_record, 44100);
-#%! unlink ("record.txt")
-#%! record (recorder);
-#%! pause (2);
-#%! stop (recorder);
-#%! s = stat ("record.txt");
-#%! assert (s.size > 0);
+## Test input validation
+%!error <first argument cannot be a callback> audiorecorder (@ls)
+%!error <first argument cannot be a callback> audiorecorder ("ls")
--- a/scripts/audio/@audiorecorder/disp.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/audio/@audiorecorder/disp.m	Mon Aug 29 13:58:00 2022 +0200
@@ -26,17 +26,18 @@
 ## -*- texinfo -*-
 ## @deftypefn {} {} disp (@var{recorder})
 ## Display the properties of the audiorecorder object @var{recorder}.
+## @seealso{@audiorecorder/audiorecorder}
 ## @end deftypefn
 
 function disp (recorder)
 
-  if (nargin < 1)
-    print_usage ();
-  endif
-
   printf ("audiorecorder object with properties:\n\n");
   for [val, prop] = __get_properties__ (recorder)
     printf ("  %s = ", prop), disp (val);
   endfor
 
 endfunction
+
+
+## No tests possible/needed for this function
+%!assert (1)
--- a/scripts/audio/@audiorecorder/get.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/audio/@audiorecorder/get.m	Mon Aug 29 13:58:00 2022 +0200
@@ -25,38 +25,72 @@
 
 ## -*- texinfo -*-
 ## @deftypefn  {} {@var{value} =} get (@var{recorder}, @var{name})
+## @deftypefnx {} {@var{values} =} get (@var{recorder}, @lbracechar{}@var{name1}, @var{name2}, @dots{}@rbracechar{})
 ## @deftypefnx {} {@var{values} =} get (@var{recorder})
 ## Return the @var{value} of the property identified by @var{name}.
 ##
-## If @var{name} is a cell array, return the values of the properties
-## corresponding to the elements of the cell array.  Given only the recorder
-## object, return a scalar structure with values of all properties of
-## @var{recorder}.  The field names of the structure correspond to property
+## If @var{name} is a cell array return the values of the properties
+## identified by the elements of the cell array.  Given only the recorder
+## object, return a scalar structure with values for all properties of
+## @var{recorder}.  The field names of the structure correspond to the property
 ## names.
+## @seealso{@audiorecorder/set, @audiorecorder/audiorecorder}
 ## @end deftypefn
 
-function retval = get (varargin)
+function value = get (recorder, name)
 
-  if (nargin < 1 || nargin > 2)
-    print_usage ();
-  endif
-
-  properties = __get_properties__ (varargin{1});
+  properties = __get_properties__ (recorder);
 
   if (nargin == 1)
-    retval = properties;
+    value = properties;
   elseif (nargin == 2)
-    pnames = varargin{2};
+    pnames = name;
     if (ischar (pnames))
-      retval = getfield (properties, pnames);
+      value = getproperty (properties, pnames);
     elseif (iscellstr (pnames))
-      retval = cell (size (pnames));
+      value = cell (size (pnames));
       for i = 1:numel (pnames)
-        retval{i} = getfield (properties, pnames{i});
+        value{i} = getproperty (properties, pnames{i});
       endfor
     else
-      error ("@audiorecorder/get: invalid NAME argument");
+      error ("@audiorecorder/get: NAME must be a string or cell array of strings");
     endif
   endif
 
 endfunction
+
+function value = getproperty (properties, pname)
+
+  persistent valid_props;
+  if (isempty (valid_props))
+    valid_props = { "BitsPerSample", "CurrentSample", "DeviceID", ...
+                    "NumberOfChannels", "Running", "SampleRate", ...
+                    "TotalSamples", "Tag", "Type", "UserData" };
+  endif
+
+  idx = find (strcmpi (pname, valid_props), 1);
+  if (isempty (idx))
+    error ('@audiorecorder/get: "%s" is not a valid property name', pname);
+  endif
+
+  value = properties.(valid_props{idx});
+
+endfunction
+
+
+%!testif HAVE_PORTAUDIO; audiodevinfo (1) > 0
+%! recorder = audiorecorder (44100, 16, 2);
+%! props = get (recorder);
+%! assert (fieldnames (props), {"BitsPerSample"; "CurrentSample"; "DeviceID";
+%!         "NumberOfChannels"; "Running"; "SampleRate"; "TotalSamples"; "Tag";
+%!         "Type"; "UserData"});
+%! value = get (recorder, "Running");
+%! assert (value, "off");
+%! values = get (recorder, {"SampleRate", "BitsPerSample", "NumberOfChannels"});
+%! assert (values, {44100, 16, 2});
+
+## Test input validation
+%!testif HAVE_PORTAUDIO; audiodevinfo (1) > 0
+%! recorder = audiorecorder (44100, 16, 2);
+%! fail ("get (recorder, 1)", "NAME must be a string");
+%! fail ('get (recorder, "foobar")', '"foobar" is not a valid property');
--- a/scripts/audio/@audiorecorder/getaudiodata.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/audio/@audiorecorder/getaudiodata.m	Mon Aug 29 13:58:00 2022 +0200
@@ -26,41 +26,74 @@
 ## -*- texinfo -*-
 ## @deftypefn  {} {@var{data} =} getaudiodata (@var{recorder})
 ## @deftypefnx {} {@var{data} =} getaudiodata (@var{recorder}, @var{datatype})
-## Return recorder audio data as a matrix with values between -1.0 and 1.0
-## and with as many columns as there are channels in the recorder.
+## Return audio data from audiorecorder object @var{recorder} as a double
+## matrix with values between -1.0 and 1.0 and with as many columns as there
+## are channels in @var{recorder}.
 ##
 ## Given the optional argument @var{datatype}, convert the recorded data
 ## to the specified type, which may be one of @qcode{"double"},
 ## @qcode{"single"}, @qcode{"int16"}, @qcode{"int8"} or @qcode{"uint8"}.
+## @seealso{@audiorecorder/audiorecorder}
 ## @end deftypefn
 
-function data = getaudiodata (varargin)
+function data = getaudiodata (recorder, datatype)
 
-  if (nargin < 1 || nargin > 2)
-    print_usage ();
-  endif
-
-  recorder = varargin{1};
+  hrecorder = struct (recorder).recorder;
 
   if (nargin == 1)
-    data = __recorder_getaudiodata__ (struct (recorder).recorder);
+    data = __recorder_getaudiodata__ (hrecorder);
   else
-    data = __recorder_getaudiodata__ (struct (recorder).recorder);
-    type = varargin{2};
-    switch (type)
+    data = __recorder_getaudiodata__ (hrecorder);
+    switch (datatype)
+      case "double"
+        ## Do nothing, data is already of type double
+      case "single"
+        data = single (data);
       case "int16"
         data = int16 (data * (2.0 ^ 15));
       case "int8"
         data = int8 (data * (2.0 ^ 7));
       case "uint8"
         data = uint8 ((data + 1.0) * 0.5 * (2.0 ^ 8 - 1));
+      otherwise
+        error ('@audiorecorder/getaudiodata: invalid DATATYPE "%s"', datatype)
     endswitch
   endif
 
   if (get (recorder, "NumberOfChannels") == 2)
-    data = data';
+    data = data.';
   else
-    data = data(1,:)';
+    data = data(1,:).';
   endif
 
 endfunction
+
+
+## Tests of audiorecorder must not actually record anything.
+%!testif HAVE_PORTAUDIO; audiodevinfo (1) > 0
+%! recorder = audiorecorder (44100, 16, 2);
+%! data = getaudiodata (recorder);
+%! assert (isa (data, "double"));
+%! data = getaudiodata (recorder, "double");
+%! assert (isa (data, "double"));
+%! data = getaudiodata (recorder, "single");
+%! assert (isa (data, "single"));
+%! data = getaudiodata (recorder, "int16");
+%! assert (isa (data, "int16"));
+%! data = getaudiodata (recorder, "int8");
+%! assert (isa (data, "int8"));
+%! data = getaudiodata (recorder, "uint8");
+%! assert (isa (data, "uint8"));
+%! assert (size (data)(1), recorder.TotalSamples);
+%! assert (size (data)(2), 2);
+
+%!testif HAVE_PORTAUDIO; audiodevinfo (1) > 0
+%! recorder = audiorecorder (44100, 8, 1);
+%! data = getaudiodata (recorder);
+%! assert (size (data)(1), recorder.TotalSamples);
+%! assert (size (data)(2), 1);
+
+## Test input validation
+%!testif HAVE_PORTAUDIO; audiodevinfo (1) > 0
+%! recorder = audiorecorder (44100, 16, 2);
+%! fail ("getaudiodata (recorder, 'foobar')", "invalid DATATYPE");
--- a/scripts/audio/@audiorecorder/getplayer.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/audio/@audiorecorder/getplayer.m	Mon Aug 29 13:58:00 2022 +0200
@@ -27,17 +27,23 @@
 ## @deftypefn {} {@var{player} =} getplayer (@var{recorder})
 ## Return an audioplayer object with data recorded by the audiorecorder object
 ## @var{recorder}.
+## @seealso{@audioplayer/audioplayer, @audiorecorder/audiorecorder}
 ## @end deftypefn
 
-function player = getplayer (varargin)
+function player = getplayer (recorder)
 
-  if (nargin < 1 || nargin > 2)
-    print_usage ();
-  endif
-
-  recorder = varargin{1};
   data = getaudiodata (recorder);
-  player = audioplayer (data, get (recorder, "SampleRate"),
+  player = audioplayer (data,
+                        get (recorder, "SampleRate"),
                         get (recorder, "BitsPerSample"));
 
 endfunction
+
+
+## FIXME: Uncomment when audioplayer constructor supports null data
+%!#testif HAVE_PORTAUDIO; audiodevinfo (1) > 0
+%!# recorder = audiorecorder (44100, 16, 2);
+%!# player = getplayer (recorder);
+%!# assert (isa (player, "audioplayer"));
+%!# assert (player.SampleRate, 44100);
+%!# assert (player.BitsPerSample, 16);
--- a/scripts/audio/@audiorecorder/isrecording.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/audio/@audiorecorder/isrecording.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,17 +24,19 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} isrecording (@var{recorder})
+## @deftypefn {} {@var{tf} =} isrecording (@var{recorder})
 ## Return true if the audiorecorder object @var{recorder} is currently
 ## recording audio and false otherwise.
+## @seealso{@audiorecorder/pause, @audiorecorder/audiorecorder}
 ## @end deftypefn
 
-function result = isrecording (recorder)
+function tf = isrecording (recorder)
 
-  if (nargin < 1)
-    print_usage ();
-  endif
-
-  result = __recorder_isrecording__ (struct (recorder).recorder);
+  tf = __recorder_isrecording__ (struct (recorder).recorder);
 
 endfunction
+
+
+%!testif HAVE_PORTAUDIO; audiodevinfo (1) > 0
+%! recorder = audiorecorder (44100, 16, 2);
+%! assert (isrecording (recorder), false);
--- a/scripts/audio/@audiorecorder/pause.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/audio/@audiorecorder/pause.m	Mon Aug 29 13:58:00 2022 +0200
@@ -25,15 +25,17 @@
 
 ## -*- texinfo -*-
 ## @deftypefn {} {} pause (@var{recorder})
-## Pause recording with audiorecorder object @var{recorder}.
+## Pause recording for audiorecorder @var{recorder}.
+## @seealso{@audiorecorder/resume, @audiorecorder/stop,
+## @audiorecorder/audiorecorder}
 ## @end deftypefn
 
 function pause (recorder)
 
-  if (nargin < 1)
-    print_usage ();
-  endif
-
   __recorder_pause__ (struct (recorder).recorder);
 
 endfunction
+
+
+## No tests possible for this function
+%!assert (1)
--- a/scripts/audio/@audiorecorder/play.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/audio/@audiorecorder/play.m	Mon Aug 29 13:58:00 2022 +0200
@@ -27,30 +27,33 @@
 ## @deftypefn  {} {@var{player} =} play (@var{recorder})
 ## @deftypefnx {} {@var{player} =} play (@var{recorder}, @var{start})
 ## @deftypefnx {} {@var{player} =} play (@var{recorder}, [@var{start}, @var{end}])
-## Play the audio recorded in @var{recorder} and return a corresponding
-## audioplayer object.
+## Play the audio recorded in @var{recorder} without blocking and return a
+## corresponding audioplayer object.
 ##
 ## If the optional argument @var{start} is provided, begin playing
-## @var{start} seconds in to the recording.
+## @var{start} seconds into the recording.
 ##
 ## If the optional argument @var{end} is provided, stop playing at
-## @var{end} seconds in the recording.
+## @var{end} seconds into the recording.
+## @seealso{@audiorecorder/getplayer, @audioplayer/audioplayer, 
+## @audiorecorder/audiorecorder}
 ## @end deftypefn
 
-function player = play (varargin)
+function player = play (recorder, start)
 
-  if (nargin < 1 || nargin > 2)
-    print_usage ();
-  endif
+  data = getaudiodata (recorder);
+  player = audioplayer (data,
+                        get (recorder, "SampleRate"),
+                        get (recorder, "BitsPerSample"));
 
-  recorder = varargin{1};
-  data = getaudiodata (recorder);
-  player = audioplayer (data, get (recorder, "SampleRate"),
-                        get (recorder, "BitsPerSample"));
   if (nargin == 1)
     play (player);
   else
-    play (player, varargin{2});
+    play (player, start);
   endif
 
 endfunction
+
+
+## No tests possible for this function
+%!assert (1)
--- a/scripts/audio/@audiorecorder/record.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/audio/@audiorecorder/record.m	Mon Aug 29 13:58:00 2022 +0200
@@ -27,18 +27,25 @@
 ## @deftypefn  {} {} record (@var{recorder})
 ## @deftypefnx {} {} record (@var{recorder}, @var{length})
 ## Record audio without blocking using the audiorecorder object
-## @var{recorder} until stopped or paused by the @var{stop} or @var{pause}
-## method.
+## @var{recorder} until paused or stopped by the @var{pause} or @var{stop}
+## methods.
 ##
 ## Given the optional argument @var{length}, record for @var{length} seconds.
+## @seealso{@audiorecorder/recordblocking, @audiorecorder/audiorecorder}
 ## @end deftypefn
 
-function record (varargin)
+function record (recorder, length)
+
+  hrecorder = struct (recorder).recorder;
 
-  if (nargin < 1 || nargin > 2)
-    print_usage ();
+  if (nargin == 1)
+    __recorder_record__ (hrecorder);
+  else
+    __recorder_record__ (hrecorder, length);
   endif
 
-  __recorder_record__ (struct (varargin{1}).recorder, varargin{2:end});
+endfunction
+
 
-endfunction
+## No tests possible for this function
+%!assert (1)
--- a/scripts/audio/@audiorecorder/recordblocking.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/audio/@audiorecorder/recordblocking.m	Mon Aug 29 13:58:00 2022 +0200
@@ -28,14 +28,19 @@
 ## Record audio with blocking (synchronous I/O).
 ##
 ## The length of the recording in seconds (@var{length}) must be specified.
+## @seealso{@audiorecorder/record, @audiorecorder/audiorecorder}
 ## @end deftypefn
 
-function recordblocking (varargin)
+function recordblocking (recorder, length)
 
   if (nargin != 2)
     print_usage ();
   endif
 
-  __recorder_recordblocking__ (struct (varargin{1}).recorder, varargin{2});
+  __recorder_recordblocking__ (struct (recorder).recorder, length);
 
 endfunction
+
+
+## No tests possible for this function
+%!assert (1)
--- a/scripts/audio/@audiorecorder/resume.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/audio/@audiorecorder/resume.m	Mon Aug 29 13:58:00 2022 +0200
@@ -26,14 +26,16 @@
 ## -*- texinfo -*-
 ## @deftypefn {} {} resume (@var{recorder})
 ## Resume recording with the paused audiorecorder object @var{recorder}.
+## @seealso{@audiorecorder/pause, @audiorecorder/stop,
+## @audiorecorder/audiorecorder}
 ## @end deftypefn
 
 function resume (recorder)
 
-  if (nargin < 1)
-    print_usage ();
-  endif
-
   __recorder_resume__ (struct (recorder).recorder);
 
 endfunction
+
+
+## No tests possible for this function
+%!assert (1)
--- a/scripts/audio/@audiorecorder/set.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/audio/@audiorecorder/set.m	Mon Aug 29 13:58:00 2022 +0200
@@ -25,42 +25,44 @@
 
 ## -*- texinfo -*-
 ## @deftypefn  {} {} set (@var{recorder}, @var{name}, @var{value})
-## @deftypefnx {} {} set (@var{recorder}, @var{properties})
+## @deftypefnx {} {} set (@var{recorder}, @var{name_cell}, @var{value_cell})
+## @deftypefnx {} {} set (@var{recorder}, @var{properties_struct})
 ## @deftypefnx {} {@var{properties} =} set (@var{recorder})
 ## Set the value of property specified by @var{name} to a given @var{value}.
 ##
-## If @var{name} and @var{value} are cell arrays of the same size, set each
-## property to a corresponding value.  Given a structure with fields
+## If @var{name} and @var{value} are cell arrays, set each property to a
+## corresponding value.  Given a structure of properties with fields
 ## corresponding to property names, set the value of those properties to the
-## corresponding field values.  Given only the recorder object, return a
-## structure of settable properties.
+## corresponding field values.  Given only a recorder object, return a
+## structure of configurable properties (i.e., writeable properties).
+## @seealso{@audiorecorder/get, @audiorecorder/audiorecorder}
 ## @end deftypefn
 
-function settable = set (varargin)
+function properties = set (recorder, varargin)
 
-  if (nargin < 1 || nargin > 3)
+  if (nargin > 3)
     print_usage ();
   endif
 
-  recorder = struct (varargin{1}).recorder;
+  hrecorder = struct (recorder).recorder;
 
   if (nargin == 1)
-    settable.SampleRate = {};
-    settable.Tag = {};
-    settable.UserData = {};
+    properties = struct ("SampleRate", {{}}, "Tag", {{}}, "UserData", {{}});
+
   elseif (nargin == 2)
-    for [value, property] = varargin{2}
-      setproperty (recorder, property, value);
+    for [value, property] = varargin{1}
+      setproperty (hrecorder, property, value);
     endfor
+
   elseif (nargin == 3)
-    if (iscell (varargin{2}))
+    if (iscell (varargin{1}))
       index = 1;
-      for property = varargin{2}
-        setproperty (recorder, char (property), varargin{3}{index});
+      for property = varargin{1}
+        setproperty (hrecorder, char (property), varargin{2}{index});
         index += 1;
       endfor
     else
-      setproperty (recorder, varargin{2}, varargin{3});
+      setproperty (hrecorder, varargin{1}, varargin{2});
     endif
   endif
 
@@ -68,15 +70,52 @@
 
 function setproperty (recorder, property, value)
 
-  switch (property)
-    case "SampleRate"
+  switch (lower (property))
+    case "samplerate"
       __recorder_set_fs__ (recorder, value);
-    case "Tag"
+    case "tag"
       __recorder_set_tag__ (recorder, value);
-    case "UserData"
+    case "userdata"
       __recorder_set_userdata__ (recorder, value);
     otherwise
-      error ("@audiorecorder/set: no such property or the property specified is read-only");
+      error ('@audiorecorder/set: "%s" is not a valid property name or is read-only', property);
   endswitch
 
 endfunction
+
+
+## Tests of audiorecorder must not actually record anything.
+%!testif HAVE_PORTAUDIO; audiodevinfo (1) > 0
+%! recorder = audiorecorder ();
+%! set (recorder, "SampleRate", 8800);
+%! set (recorder, "Tag", "mytag");
+%! ## Also test case insensitivity
+%! set (recorder, "USERdata", [1, 2; 3, 4]);
+%! assert (recorder.SampleRate, 8800);
+%! assert (recorder.Tag, "mytag");
+%! assert (recorder.UserData, [1, 2; 3, 4]);
+
+%!testif HAVE_PORTAUDIO; audiodevinfo (1) > 0
+%! recorder = audiorecorder ();
+%! set (recorder, {"SampleRate", "Tag", "UserData"},
+%!                {8800, "mytag", [1, 2; 3, 4]});
+%! assert (recorder.SampleRate, 8800);
+%! assert (recorder.Tag, "mytag");
+%! assert (recorder.UserData, [1, 2; 3, 4]);
+
+%!testif HAVE_PORTAUDIO; audiodevinfo (1) > 0
+%! recorder = audiorecorder ();
+%! props = set (recorder);
+%! props.SampleRate = 8800;
+%! props.Tag = "mytag";
+%! props.UserData = [1, 2; 3, 4];
+%! set (recorder, props);
+%! assert (recorder.SampleRate, 8800);
+%! assert (recorder.Tag, "mytag");
+%! assert (recorder.UserData, [1, 2; 3, 4]);
+
+## Test input validation
+%!testif HAVE_PORTAUDIO; audiodevinfo (1) > 0
+%! recorder = audiorecorder ();
+%! fail ('set (recorder, "foobar", 1)', "not a valid property name"); 
+%! fail ('set (recorder, "Running", 1)', "is read-only"); 
--- a/scripts/audio/@audiorecorder/stop.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/audio/@audiorecorder/stop.m	Mon Aug 29 13:58:00 2022 +0200
@@ -25,15 +25,18 @@
 
 ## -*- texinfo -*-
 ## @deftypefn {} {} stop (@var{recorder})
-## Stop the audiorecorder object @var{recorder} and clean up any audio streams.
+## Stop recording with audiorecorder object @var{recorder} and clean up any
+## audio streams.
+## @seealso{@audiorecorder/pause, @audiorecorder/resume,
+## @audiorecorder/audiorecorder}
 ## @end deftypefn
 
 function stop (recorder)
 
-  if (nargin < 1)
-    print_usage ();
-  endif
-
   __recorder_stop__ (struct (recorder).recorder);
 
 endfunction
+
+
+## No tests possible for this function
+%!assert (1)
--- a/scripts/audio/@audiorecorder/subsasgn.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/audio/@audiorecorder/subsasgn.m	Mon Aug 29 13:58:00 2022 +0200
@@ -28,9 +28,10 @@
 ## Perform subscripted assignment on the audio recorder object @var{recorder}.
 ##
 ## Assign the value of @var{rhs} to the recorder property named by @var{idx}.
+## @seealso{@audiorecorder/audiorecorder}
 ## @end deftypefn
 
-function value = subsasgn (recorder, idx, rhs)
+function recorder = subsasgn (recorder, idx, rhs)
 
   if (nargin != 3)
     print_usage ();
@@ -43,9 +44,20 @@
   if (strcmp (idx(1).type, "."))
     field = idx.subs;
     set (recorder, field, rhs);
-    value = recorder;
   else
     error ("@audiorecorder/subsasgn: invalid subscript type");
   endif
 
 endfunction
+
+
+%!testif HAVE_PORTAUDIO; audiodevinfo (1) > 0
+%! recorder = audiorecorder (44100, 16, 2);
+%! recorder.Tag = "mytag";
+%! assert (get (recorder, "Tag"), "mytag");
+
+## Test input validation
+%!testif HAVE_PORTAUDIO; audiodevinfo (1) > 0
+%! recorder = audiorecorder (44100, 16, 2);
+%! fail ("recorder(1).Tag = 5", "invalid subscript type");
+%! fail ("recorder{1}.Tag = 5", "invalid subscript type");
--- a/scripts/audio/@audiorecorder/subsref.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/audio/@audiorecorder/subsref.m	Mon Aug 29 13:58:00 2022 +0200
@@ -28,6 +28,7 @@
 ## Perform subscripted selection on the audio recorder object @var{recorder}.
 ##
 ## Return the recorder property value named by @var{idx}.
+## @seealso{@audiorecorder/audiorecorder}
 ## @end deftypefn
 
 function value = subsref (recorder, idx)
@@ -48,3 +49,15 @@
   endif
 
 endfunction
+
+
+%!testif HAVE_PORTAUDIO; audiodevinfo (1) > 0
+%! recorder = audiorecorder (44100, 16, 2);
+%! set (recorder, "Tag", "mytag");
+%! assert (recorder.Tag, "mytag");
+
+## Test input validation
+%!testif HAVE_PORTAUDIO; audiodevinfo (1) > 0
+%! recorder = audiorecorder (44100, 16, 2);
+%! fail ("recorder(1).Tag", "invalid subscript type");
+%! fail ("recorder{1}.Tag", "invalid subscript type");
--- a/scripts/audio/lin2mu.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/audio/lin2mu.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,47 +24,41 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {@var{y} =} lin2mu (@var{x}, @var{n})
+## @deftypefn  {} {@var{y} =} lin2mu (@var{x})
+## @deftypefnx {} {@var{y} =} lin2mu (@var{x}, @var{n})
 ## Convert audio data from linear to mu-law.
 ##
-## Mu-law values use 8-bit unsigned integers.  Linear values use @var{n}-bit
-## signed integers or floating point values in the range -1 @leq{} @var{x}
-## @leq{} 1 if @var{n} is 0.
-##
-## If @var{n} is not specified it defaults to 0, 8, or 16 depending on
-## the range of values in @var{x}.
+## Linear values use floating point values in the range -1 @leq{} @var{x}
+## @leq{} 1 if @var{n} is 0 (default), or @var{n}-bit signed integers if @var{n}
+## is 8 or 16.  Mu-law values are 8-bit unsigned integers in the range
+## 0 @leq{} @var{y} @leq{} 255.
 ## @seealso{mu2lin}
 ## @end deftypefn
 
-
-function y = lin2mu (x, n)
+function y = lin2mu (x, n = 0)
 
   if (nargin < 1)
     print_usage ();
   endif
 
-  if (nargin == 1)
-    range = max (abs (x (:)));
-    if (range <= 1)
+  ## Convert to floating point integers per Matlab.
+  x = double (x);
+
+  if (nargin == 2)
+    if (! isscalar (n) && ! isreal (n)
+        || (n != 0 && n != 8 && n != 16))
+      error ("lin2mu: N must be either 0, 8, or 16");
+    elseif (isempty (n))
       n = 0;
-    elseif (range <= 128)
-      n = 8;
-      warning ("lin2mu: no precision specified, so using %d", n);
-    else
-      n = 16;
-    endif
-  else
-    if (n != 0 && n != 8 && n != 16)
-      error ("lin2mu: N must be either 0, 8 or 16");
     endif
   endif
 
   ## Transform real and n-bit format to 16-bit.
   if (n == 0)
     ## [-1,1] -> [-32768, 32768]
-    x = 32768 * x;
+    x *= 32768;
   elseif (n != 16)
-    x = 2^(16-n) .* x;
+    x *= 256;
   endif
 
   ## Determine sign of x, set sign(0) = 1.
@@ -74,9 +68,36 @@
   ## add bias.
   x = min (abs (x), 32635) + 132;
 
-  ## Find exponent and fraction of bineary representation.
+  ## Find exponent and fraction of binary representation.
   [f, e] = log2 (x);
 
   y = 64 * sig - 16 * e - fix (32 * f) + 335;
 
 endfunction
+
+
+## Test functionality
+%!test
+%! x = -1:1;
+%! y = x';
+%! assert (lin2mu (x), (lin2mu (y))')
+%! assert (lin2mu (x), [0, 255, 128])
+
+%!assert (lin2mu ([0, 1, NaN, inf, -inf], 8), [255, 231, NaN, 128, 0])
+%!assert (lin2mu ([]), [])
+%!assert (lin2mu (0), 255)
+%!assert (lin2mu (0, 0), 255)
+%!assert (lin2mu (0, 8), 255)
+%!assert (lin2mu (0, 16), 255)
+%!assert (lin2mu (2, 8), 219)
+%!assert (lin2mu (3, []), 128)
+%!assert (lin2mu (3, 16), 255)
+%!assert (lin2mu (repmat (-0.23, 1, 1000), 0), repmat (34, 1, 1000))
+%!assert (lin2mu (ones (2, 2), 0), repmat (128, 2))
+
+## Test input validation
+%!error <Invalid call> lin2mu ()
+%!error <N must be either 0, 8, or 16> lin2mu (1, 2)
+%!error <N must be either 0, 8, or 16> lin2mu (1, [1,2])
+%!error <N must be either 0, 8, or 16> lin2mu (1, ones (1, 2))
+%!error <invalid conversion> lin2mu ({2:5})
--- a/scripts/audio/mu2lin.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/audio/mu2lin.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,14 +24,20 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {@var{y} =} mu2lin (@var{x}, @var{n})
+## @deftypefn  {} {@var{y} =} mu2lin (@var{x})
+## @deftypefnx {} {@var{y} =} mu2lin (@var{x}, @var{n})
 ## Convert audio data from mu-law to linear.
 ##
-## Mu-law values are 8-bit unsigned integers.  Linear values use @var{n}-bit
-## signed integers or floating point values in the range -1 @leq{} @var{y}
-## @leq{} 1 if @var{n} is 0.
+## Mu-law values are 8-bit unsigned integers in the range 0 @leq{} @var{y}
+## @leq{} 255.  Linear values use floating point values in the range
+## -@var{linmax} @leq{} @var{x} @var{linmax} (where
+## @code{@var{linmax} = 32124/32768 =~ 0.98}) when @var{n} is zero (default).
+## If @var{n} is 8 or 16 then @var{n}-bit signed integers are used instead.
 ##
-## If @var{n} is not specified it defaults to 0.
+## Programming Note: @code{mu2lin} maps maximum mu-law inputs to values
+## slightly below the maximum ([-0.98, +0.98]) representable with a linear
+## scale.  Because of this, @code{mu2lin (lin2mu (@var{x}))} might not
+## reproduce the original input.
 ## @seealso{lin2mu}
 ## @end deftypefn
 
@@ -41,8 +47,13 @@
     print_usage ();
   endif
 
-  if (n != 0 && n != 8 && n != 16)
-    error ("mu2lin: N must be either 0, 8, or 16");
+  if (nargin == 2)
+    if (! isscalar (n) && ! isreal (n)
+        || (n != 0 && n != 8 && n != 16))
+      error ("lin2mu: N must be either 0, 8, or 16");
+    elseif (isempty (n))
+      n = 0;
+    endif
   endif
 
   ulaw = [32124, 31100, 30076, 29052, 28028, 27004, 25980, 24956, ...
@@ -74,7 +85,7 @@
     ## [ -32768, 32767 ] -> [ -1, 1)
     y /= 32768;
   elseif (n == 8)
-    ld = max (abs (y (:)));
+    ld = max (abs (y(:)));
     if (ld < 16384 && ld > 0)
       sc = 64 / ld;
     else
@@ -84,3 +95,32 @@
   endif
 
 endfunction
+
+
+## Test functionality
+%!shared linmax
+%! linmax = 32124 / 32768;
+
+%!test
+%! x = [0, 128, 255];
+%! y = x';
+%! assert (mu2lin (x), (mu2lin (y))');
+%! assert (mu2lin (x), [-linmax, +linmax, 0]);
+
+%!assert (mu2lin ([]), [])
+%!assert (mu2lin (255), 0)
+%!assert (mu2lin (255, 0), 0)
+%!assert (mu2lin (255, 8), 0)
+%!assert (mu2lin (255, 16), 0)
+%!assert (mu2lin (128, []), linmax)
+%!assert (mu2lin (128, 8), 125)
+%!assert (mu2lin (128, 16), 32124)
+%!assert (mu2lin (zeros (1, 1000), 0), repmat (-linmax, 1, 1000))
+%!assert (mu2lin (255*ones (2, 2), 0), zeros (2, 2))
+
+## Test input validation
+%!error <Invalid call> mu2lin ()
+%!error <N must be either 0, 8, or 16> mu2lin (1, 2)
+%!error <N must be either 0, 8, or 16> mu2lin (1, [1,2])
+%!error <N must be either 0, 8, or 16> mu2lin (1, ones (1, 2))
+%!error mu2lin ({2:5})
--- a/scripts/audio/record.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/audio/record.m	Mon Aug 29 13:58:00 2022 +0200
@@ -33,10 +33,10 @@
 ## for recording.
 ##
 ## For more control over audio recording, use the @code{audiorecorder} class.
-## @seealso{sound, soundsc}
+## @seealso{@audiorecorder/audiorecorder, sound, soundsc}
 ## @end deftypefn
 
-function x = record (sec, fs = 8000)
+function data = record (sec, fs = 8000)
 
   if (nargin < 1)
     print_usage ();
@@ -50,16 +50,14 @@
     error ("record: sample rate FS must be a positive number");
   endif
 
-  x = [];
+  data = [];
 
   if (sec > 0)
-
     rec = audiorecorder (fs, 16, 1);
 
     recordblocking (rec, sec);
 
-    x = getaudiodata (rec);
-
+    data = getaudiodata (rec);
   endif
 
 endfunction
--- a/scripts/audio/sound.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/audio/sound.m	Mon Aug 29 13:58:00 2022 +0200
@@ -30,7 +30,7 @@
 ## Play audio data @var{y} at sample rate @var{fs} to the default audio
 ## device.
 ##
-## The audio signal @var{y} can be a vector or a two-column array, representing
+## The audio signal @var{y} can be a vector or a two-column array representing
 ## mono or stereo audio, respectively.
 ##
 ## If @var{fs} is not given, a default sample rate of 8000 samples per second
@@ -40,7 +40,7 @@
 ## audio device and defaults to 8 bits.
 ##
 ## For more control over audio playback, use the @code{audioplayer} class.
-## @seealso{soundsc, record}
+## @seealso{soundsc, @audioplayer/audioplayer, record}
 ## @end deftypefn
 
 function sound (y, fs, nbits)
--- a/scripts/audio/soundsc.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/audio/soundsc.m	Mon Aug 29 13:58:00 2022 +0200
@@ -31,7 +31,7 @@
 ## Scale the audio data @var{y} and play it at sample rate @var{fs} to the
 ## default audio device.
 ##
-## The audio signal @var{y} can be a vector or a two-column array, representing
+## The audio signal @var{y} can be a vector or a two-column array representing
 ## mono or stereo audio, respectively.
 ##
 ## If @var{fs} is not given, a default sample rate of 8000 samples per second
@@ -46,19 +46,15 @@
 ## are scaled to the range [-1, 1] instead.
 ##
 ## For more control over audio playback, use the @code{audioplayer} class.
-## @seealso{sound, record}
+## @seealso{sound, @audioplayer/audioplayer, record}
 ## @end deftypefn
 
-function soundsc (y, fs, nbits, yrange)
+function soundsc (y, fs, nbits, yrange = [])
 
   if (nargin < 1)
     print_usage ();
   endif
 
-  if (nargin < 4)
-    yrange = [];
-  endif
-
   if (nargin < 2 || isempty (fs))
     fs = 8000;
   elseif (nargin == 2 && numel (fs) > 1)
--- a/scripts/deprecated/disable_diagonal_matrix.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/deprecated/disable_diagonal_matrix.m	Mon Aug 29 13:58:00 2022 +0200
@@ -26,7 +26,7 @@
 ## -*- texinfo -*-
 ## @deftypefn  {} {@var{val} =} disable_diagonal_matrix ()
 ## @deftypefnx {} {@var{old_val} =} disable_diagonal_matrix (@var{new_val})
-## @deftypefnx {} {} disable_diagonal_matrix (@var{new_val}, "local")
+## @deftypefnx {} {@var{old_val} =} disable_diagonal_matrix (@var{new_val}, "local")
 ##
 ## @code{disable_diagonal_matrix} is deprecated and will be removed in Octave
 ## version 9.  Use @code{optimize_diagonal_matrix} instead.
--- a/scripts/deprecated/disable_permutation_matrix.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/deprecated/disable_permutation_matrix.m	Mon Aug 29 13:58:00 2022 +0200
@@ -26,7 +26,7 @@
 ## -*- texinfo -*-
 ## @deftypefn  {} {@var{val} =} disable_permutation_matrix ()
 ## @deftypefnx {} {@var{old_val} =} disable_permutation_matrix (@var{new_val})
-## @deftypefnx {} {} disable_permutation_matrix (@var{new_val}, "local")
+## @deftypefnx {} {@var{old_val} =} disable_permutation_matrix (@var{new_val}, "local")
 ##
 ## @code{disable_permutation_matrix} is deprecated and will be removed in
 ## Octave version 9.  Use @code{optimize_permutation_matrix} instead.
--- a/scripts/deprecated/disable_range.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/deprecated/disable_range.m	Mon Aug 29 13:58:00 2022 +0200
@@ -26,7 +26,7 @@
 ## -*- texinfo -*-
 ## @deftypefn  {} {@var{val} =} disable_range ()
 ## @deftypefnx {} {@var{old_val} =} disable_range (@var{new_val})
-## @deftypefnx {} {} disable_range (@var{new_val}, "local")
+## @deftypefnx {} {@var{old_val} =} disable_range (@var{new_val}, "local")
 ##
 ## @code{disable_range} is deprecated and will be removed in Octave version 9.
 ## Use @code{optimize_range} instead.
--- a/scripts/deprecated/module.mk	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/deprecated/module.mk	Mon Aug 29 13:58:00 2022 +0200
@@ -5,7 +5,8 @@
   %reldir%/disable_diagonal_matrix.m \
   %reldir%/disable_permutation_matrix.m \
   %reldir%/disable_range.m \
-  %reldir%/runtests.m
+  %reldir%/shift.m \
+  %reldir%/sparse_auto_mutate.m
 
 %canon_reldir%dir = $(fcnfiledir)/deprecated
 
--- a/scripts/deprecated/runtests.m	Sun Aug 28 22:44:49 2022 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,57 +0,0 @@
-########################################################################
-##
-## Copyright (C) 2010-2022 The Octave Project Developers
-##
-## See the file COPYRIGHT.md in the top-level directory of this
-## distribution or <https://octave.org/copyright/>.
-##
-## This file is part of Octave.
-##
-## Octave is free software: you can redistribute it and/or modify it
-## under the terms of the GNU General Public License as published by
-## the Free Software Foundation, either version 3 of the License, or
-## (at your option) any later version.
-##
-## Octave is distributed in the hope that it will be useful, but
-## WITHOUT ANY WARRANTY; without even the implied warranty of
-## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-## GNU General Public License for more details.
-##
-## You should have received a copy of the GNU General Public License
-## along with Octave; see the file COPYING.  If not, see
-## <https://www.gnu.org/licenses/>.
-##
-########################################################################
-
-## -*- texinfo -*-
-## @deftypefn  {} {} runtests ()
-## @deftypefnx {} {} runtests (@var{directory})
-##
-##
-## @code{runtests} is deprecated and will be removed in Octave version 8.
-## Use @code{oruntests} instead.
-##
-## Execute built-in tests for all m-files in the specified @var{directory}.
-##
-## Test blocks in any C++ source files (@file{*.cc}) will also be executed
-## for use with dynamically linked oct-file functions.
-##
-## If no directory is specified, operate on all directories in Octave's search
-## path for functions.
-## @seealso{oruntests, rundemos, test, path}
-## @end deftypefn
-
-## FIXME: DEPRECATED: Remove in version 8.
-
-function runtests (varargin)
-
-  persistent warned = false;
-  if (! warned)
-    warned = true;
-    warning ("Octave:deprecated-function",
-             "runtests is obsolete and will be removed from a future version of Octave, please use oruntests instead\n");
-  endif
-
-  oruntests (varargin{:});
-
-endfunction
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/scripts/deprecated/shift.m	Mon Aug 29 13:58:00 2022 +0200
@@ -0,0 +1,115 @@
+########################################################################
+##
+## Copyright (C) 1995-2022 The Octave Project Developers
+##
+## See the file COPYRIGHT.md in the top-level directory of this
+## distribution or <https://octave.org/copyright/>.
+##
+## This file is part of Octave.
+##
+## Octave is free software: you can redistribute it and/or modify it
+## under the terms of the GNU General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## Octave is distributed in the hope that it will be useful, but
+## WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with Octave; see the file COPYING.  If not, see
+## <https://www.gnu.org/licenses/>.
+##
+########################################################################
+
+## -*- texinfo -*-
+## @deftypefn  {} {@var{y} =} shift (@var{x}, @var{b})
+## @deftypefnx {} {@var{y} =} shift (@var{x}, @var{b}, @var{dim})
+##
+## @code{shift} is deprecated and will be removed in Octave version 10.  Use
+## @code{circshift} instead.
+##
+## If @var{x} is a vector, perform a circular shift of length @var{b} of
+## the elements of @var{x}.
+##
+## If @var{x} is a matrix, do the same for each column of @var{x}.
+##
+## If the optional @var{dim} argument is given, operate along this dimension.
+## @seealso{circshift}
+## @end deftypefn
+
+## FIXME: DEPRECATED: Remove in version 10.
+
+function y = shift (x, b, dim)
+
+  persistent warned = false;
+  if (! warned)
+    warned = true;
+    warning ("Octave:deprecated-function",
+             "shift is deprecated and will be removed from a future version of Octave, please use circshift instead\n");
+  endif
+
+  if (nargin < 2)
+    print_usage ();
+  endif
+
+  if (numel (x) < 1)
+    error ("shift: X must not be empty");
+  elseif (! (isscalar (b) && b == fix (b)))
+    error ("shift: B must be an integer");
+  endif
+
+  nd = ndims (x);
+  sz = size (x);
+
+  if (nargin == 3)
+    if (!(isscalar (dim) && dim == fix (dim))
+        || !(1 <= dim && dim <= nd))
+      error ("shift: DIM must be an integer and a valid dimension");
+    endif
+  else
+    ## Find the first non-singleton dimension.
+    (dim = find (sz > 1, 1)) || (dim = 1);
+  endif
+
+  d = sz(dim);
+
+  idx = repmat ({':'}, nd, 1);
+  if (b > 0)
+    b = rem (b, d);
+    idx{dim} = [d-b+1:d, 1:d-b];
+  elseif (b < 0)
+    b = rem (abs (b), d);
+    idx{dim} = [b+1:d, 1:b];
+  endif
+
+  y = x(idx{:});
+
+endfunction
+
+
+%!test
+%! a = [1, 2, 3];
+%! b = [4, 5, 6];
+%! c = [7, 8, 9];
+%!
+%! r = [a, b, c];
+%! m = [a; b; c];
+%!
+%! assert (shift (r, 0), r);
+%! assert (shift (r, 3), [c, a, b]);
+%! assert (shift (r, -6), [c, a, b]);
+%! assert (shift (r, -3), [b, c, a]);
+%! assert (shift (m, 1), [c; a; b]);
+%! assert (shift (m, -2), [c; a; b]);
+
+## Test input validation
+%!error <Invalid call> shift ()
+%!error <Invalid call> shift (1)
+%!error <X must not be empty> shift ([], 1)
+%!error <B must be an integer> shift (ones (2), ones (2))
+%!error <B must be an integer> shift (ones (2), 1.5)
+%!error <DIM must be an integer> shift (1, 1, 1.5)
+%!error <DIM must be .* a valid dimension> shift (1, 1, 0)
+%!error <DIM must be .* a valid dimension> shift (1, 1, 3)
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/scripts/deprecated/sparse_auto_mutate.m	Mon Aug 29 13:58:00 2022 +0200
@@ -0,0 +1,81 @@
+########################################################################
+##
+## Copyright (C) 2022 The Octave Project Developers
+##
+## See the file COPYRIGHT.md in the top-level directory of this
+## distribution or <https://octave.org/copyright/>.
+##
+## This file is part of Octave.
+##
+## Octave is free software: you can redistribute it and/or modify it
+## under the terms of the GNU General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## Octave is distributed in the hope that it will be useful, but
+## WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with Octave; see the file COPYING.  If not, see
+## <https://www.gnu.org/licenses/>.
+##
+########################################################################
+
+## -*- texinfo -*-
+## @deftypefn  {} {@var{val} =} sparse_auto_mutate ()
+## @deftypefnx {} {@var{old_val} =} sparse_auto_mutate (@var{new_val})
+## @deftypefnx {} {@var{old_val} =} sparse_auto_mutate (@var{new_val}, "local")
+##
+## @code{sparse_auto_mutate} is deprecated and will be removed in Octave
+## version 9.  Use @code{optimize_diagonal_matrix} instead.
+##
+## Query or set whether storing diagonal matrices in a special space-efficient
+## format is disabled.
+##
+## The default value is false.  If this option is set to true, Octave will
+## store ranges as full matrices.
+##
+## When called from inside a function with the @qcode{"local"} option, the
+## setting is changed locally for the function and any subroutines it calls.
+## The original setting is restored when exiting the function.
+## @seealso{sparse_auto_mutate, disable_permutation_matrix}
+## @end deftypefn
+
+## FIXME: DEPRECATED: Remove in version 10.
+
+function retval = sparse_auto_mutate (val, opt)
+
+  persistent warned = false;
+  if (! warned)
+    warned = true;
+    warning ("Octave:deprecated-function",
+             "sparse_auto_mutate is obsolete, has no effect, and will be removed from a future version of Octave\n");
+  endif
+
+  if (nargin == 0 || nargout > 0)
+    ## Always false now.
+    retval = false;
+    return;
+  endif
+
+  if (nargin == 2)
+    if (! (ischar (opt) && strcmp (opt, "local")))
+      error ('sparse_auto_mutate: second argument must be "local"');
+    endif
+    nargin = 1;
+  endif
+
+  ## Don't bother warning that "local" is invalid outside of a
+  ## function.
+
+  if (nargin > 1)
+    print_usage ();
+  endif
+
+  if (! islogical (val))
+    error ("sparse_auto_mutate: argument must be a logical value");
+  endif
+
+endfunction
--- a/scripts/elfun/acosd.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/elfun/acosd.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} acosd (@var{x})
+## @deftypefn {} {@var{y} =} acosd (@var{x})
 ## Compute the inverse cosine in degrees for each element of @var{x}.
 ## @seealso{cosd, acos}
 ## @end deftypefn
--- a/scripts/elfun/acot.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/elfun/acot.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} acot (@var{x})
+## @deftypefn {} {@var{y} =} acot (@var{x})
 ## Compute the inverse cotangent in radians for each element of @var{x}.
 ## @seealso{cot, acotd}
 ## @end deftypefn
--- a/scripts/elfun/acotd.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/elfun/acotd.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} acotd (@var{x})
+## @deftypefn {} {@var{y} =} acotd (@var{x})
 ## Compute the inverse cotangent in degrees for each element of @var{x}.
 ## @seealso{cotd, acot}
 ## @end deftypefn
--- a/scripts/elfun/acoth.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/elfun/acoth.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} acoth (@var{x})
+## @deftypefn {} {@var{y} =} acoth (@var{x})
 ## Compute the inverse hyperbolic cotangent of each element of @var{x}.
 ## @seealso{coth}
 ## @end deftypefn
--- a/scripts/elfun/acsc.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/elfun/acsc.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} acsc (@var{x})
+## @deftypefn {} {@var{y} =} acsc (@var{x})
 ## Compute the inverse cosecant in radians for each element of @var{x}.
 ## @seealso{csc, acscd}
 ## @end deftypefn
--- a/scripts/elfun/acscd.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/elfun/acscd.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} acscd (@var{x})
+## @deftypefn {} {@var{y} =} acscd (@var{x})
 ## Compute the inverse cosecant in degrees for each element of @var{x}.
 ## @seealso{cscd, acsc}
 ## @end deftypefn
--- a/scripts/elfun/acsch.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/elfun/acsch.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} acsch (@var{x})
+## @deftypefn {} {@var{y} =} acsch (@var{x})
 ## Compute the inverse hyperbolic cosecant of each element of @var{x}.
 ## @seealso{csch}
 ## @end deftypefn
--- a/scripts/elfun/asec.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/elfun/asec.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} asec (@var{x})
+## @deftypefn {} {@var{y} =} asec (@var{x})
 ## Compute the inverse secant in radians for each element of @var{x}.
 ## @seealso{sec, asecd}
 ## @end deftypefn
--- a/scripts/elfun/asecd.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/elfun/asecd.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} asecd (@var{x})
+## @deftypefn {} {@var{y} =} asecd (@var{x})
 ## Compute the inverse secant in degrees for each element of @var{x}.
 ## @seealso{secd, asec}
 ## @end deftypefn
--- a/scripts/elfun/asech.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/elfun/asech.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} asech (@var{x})
+## @deftypefn {} {@var{y} =} asech (@var{x})
 ## Compute the inverse hyperbolic secant of each element of @var{x}.
 ## @seealso{sech}
 ## @end deftypefn
--- a/scripts/elfun/asind.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/elfun/asind.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} asind (@var{x})
+## @deftypefn {} {@var{y} =} asind (@var{x})
 ## Compute the inverse sine in degrees for each element of @var{x}.
 ## @seealso{sind, asin}
 ## @end deftypefn
--- a/scripts/elfun/atan2d.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/elfun/atan2d.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,19 +24,19 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} atan2d (@var{y}, @var{x})
+## @deftypefn {} {@var{d} =} atan2d (@var{y}, @var{x})
 ## Compute atan (@var{y} / @var{x}) in degrees for corresponding elements
 ## from @var{y} and @var{x}.
 ## @seealso{tand, atan2}
 ## @end deftypefn
 
-function retval = atan2d (y, x)
+function d = atan2d (y, x)
 
   if (nargin != 2)
     print_usage ();
   endif
 
-  retval = 180 ./ pi .* atan2 (y, x);
+  d = 180 ./ pi .* atan2 (y, x);
 
 endfunction
 
--- a/scripts/elfun/atand.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/elfun/atand.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} atand (@var{x})
+## @deftypefn {} {@var{y} =} atand (@var{x})
 ## Compute the inverse tangent in degrees for each element of @var{x}.
 ## @seealso{tand, atan}
 ## @end deftypefn
--- a/scripts/elfun/cosd.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/elfun/cosd.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} cosd (@var{x})
+## @deftypefn {} {@var{y} =} cosd (@var{x})
 ## Compute the cosine for each element of @var{x} in degrees.
 ##
 ## The function is more accurate than @code{cos} for large values of @var{x}
--- a/scripts/elfun/cot.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/elfun/cot.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} cot (@var{x})
+## @deftypefn {} {@var{y} =} cot (@var{x})
 ## Compute the cotangent for each element of @var{x} in radians.
 ## @seealso{acot, cotd, coth}
 ## @end deftypefn
--- a/scripts/elfun/cotd.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/elfun/cotd.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} cotd (@var{x})
+## @deftypefn {} {@var{y} =} cotd (@var{x})
 ## Compute the cotangent for each element of @var{x} in degrees.
 ## @seealso{acotd, cot}
 ## @end deftypefn
--- a/scripts/elfun/coth.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/elfun/coth.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} coth (@var{x})
+## @deftypefn {} {@var{y} =} coth (@var{x})
 ## Compute the hyperbolic cotangent of each element of @var{x}.
 ## @seealso{acoth}
 ## @end deftypefn
--- a/scripts/elfun/csc.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/elfun/csc.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} csc (@var{x})
+## @deftypefn {} {@var{y} =} csc (@var{x})
 ## Compute the cosecant for each element of @var{x} in radians.
 ## @seealso{acsc, cscd, csch}
 ## @end deftypefn
--- a/scripts/elfun/cscd.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/elfun/cscd.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} cscd (@var{x})
+## @deftypefn {} {@var{y} =} cscd (@var{x})
 ## Compute the cosecant for each element of @var{x} in degrees.
 ## @seealso{acscd, csc}
 ## @end deftypefn
--- a/scripts/elfun/csch.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/elfun/csch.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} csch (@var{x})
+## @deftypefn {} {@var{y} =} csch (@var{x})
 ## Compute the hyperbolic cosecant of each element of @var{x}.
 ## @seealso{acsch}
 ## @end deftypefn
--- a/scripts/elfun/sec.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/elfun/sec.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} sec (@var{x})
+## @deftypefn {} {@var{y} =} sec (@var{x})
 ## Compute the secant for each element of @var{x} in radians.
 ## @seealso{asec, secd, sech}
 ## @end deftypefn
--- a/scripts/elfun/secd.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/elfun/secd.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} secd (@var{x})
+## @deftypefn {} {@var{y} =} secd (@var{x})
 ## Compute the secant for each element of @var{x} in degrees.
 ## @seealso{asecd, sec}
 ## @end deftypefn
--- a/scripts/elfun/sech.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/elfun/sech.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} sech (@var{x})
+## @deftypefn {} {@var{y} =} sech (@var{x})
 ## Compute the hyperbolic secant of each element of @var{x}.
 ## @seealso{asech}
 ## @end deftypefn
--- a/scripts/elfun/sind.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/elfun/sind.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} sind (@var{x})
+## @deftypefn {} {@var{y} =} sind (@var{x})
 ## Compute the sine for each element of @var{x} in degrees.
 ##
 ## The function is more accurate than @code{sin} for large values of @var{x}
--- a/scripts/elfun/tand.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/elfun/tand.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} tand (@var{x})
+## @deftypefn {} {@var{y} =} tand (@var{x})
 ## Compute the tangent for each element of @var{x} in degrees.
 ##
 ## Returns zero for elements where @code{@var{x}/180} is an integer and
--- a/scripts/general/accumarray.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/general/accumarray.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,11 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} accumarray (@var{subs}, @var{vals}, @var{sz}, @var{func}, @var{fillval}, @var{issparse})
-## @deftypefnx {} {} accumarray (@var{subs}, @var{vals}, @dots{})
+## @deftypefn  {} {@var{A} =} accumarray (@var{subs}, @var{vals})
+## @deftypefnx {} {@var{A} =} accumarray (@var{subs}, @var{vals}, @var{sz})
+## @deftypefnx {} {@var{A} =} accumarray (@var{subs}, @var{vals}, @var{sz}, @var{fcn})
+## @deftypefnx {} {@var{A} =} accumarray (@var{subs}, @var{vals}, @var{sz}, @var{fcn}, @var{fillval})
+## @deftypefnx {} {@var{A} =} accumarray (@var{subs}, @var{vals}, @var{sz}, @var{fcn}, @var{fillval}, @var{issparse})
 ##
 ## Create an array by accumulating the elements of a vector into the
 ## positions defined by their subscripts.
@@ -46,14 +49,14 @@
 ##
 ## The default action of @code{accumarray} is to sum the elements with
 ## the same subscripts.  This behavior can be modified by defining the
-## @var{func} function.  This should be a function or function handle
+## @var{fcn} function.  This should be a function or function handle
 ## that accepts a column vector and returns a scalar.  The result of the
 ## function should not depend on the order of the subscripts.
 ##
 ## The elements of the returned array that have no subscripts associated
 ## with them are set to zero.  Defining @var{fillval} to some other value
 ## allows these values to be defined.  This behavior changes, however,
-## for certain values of @var{func}.  If @var{func} is @code{@@min}
+## for certain values of @var{fcn}.  If @var{fcn} is @code{@@min}
 ## (respectively, @code{@@max}) then the result will be filled with the
 ## minimum (respectively, maximum) integer if @var{vals} is of integral
 ## type, logical false (respectively, logical true) if @var{vals} is of
@@ -123,7 +126,7 @@
 ## The complexity of accumarray in general for the non-sparse case is
 ## generally O(M+N), where N is the number of subscripts and M is the
 ## maximum subscript (linearized in multi-dimensional case).  If
-## @var{func} is one of @code{@@sum} (default), @code{@@max},
+## @var{fcn} is one of @code{@@sum} (default), @code{@@max},
 ## @code{@@min} or @code{@@(x) @{x@}}, an optimized code path is used.
 ## Note that for general reduction function the interpreter overhead can
 ## play a major part and it may be more efficient to do multiple
@@ -132,7 +135,7 @@
 ## @seealso{accumdim, unique, sparse}
 ## @end deftypefn
 
-function A = accumarray (subs, vals, sz = [], func = [], fillval = [], issparse = [])
+function A = accumarray (subs, vals, sz = [], fcn = [], fillval = [], issparse = [])
 
   if (nargin < 2)
     print_usage ();
@@ -160,10 +163,10 @@
     endif
   endif
 
-  if (isempty (func))
-    func = @sum;
-  elseif (! is_function_handle (func))
-    error ("accumarray: FUNC must be a function handle");
+  if (isempty (fcn))
+    fcn = @sum;
+  elseif (! is_function_handle (fcn))
+    error ("accumarray: FCN must be a function handle");
   endif
 
   if (isempty (fillval))
@@ -201,7 +204,7 @@
       error ("accumarray: in the sparse case, values must be numeric or logical");
     endif
 
-    if (func != @sum)
+    if (fcn != @sum)
 
       ## Reduce values.  This is not needed if we're about to sum them,
       ## because "sparse" can do that.
@@ -213,7 +216,7 @@
       jdx = find (any (diff (subs, 1, 1), 2));
       jdx = [jdx; n];
 
-      vals = cellfun (func, mat2cell (vals(:)(idx), diff ([0; jdx])));
+      vals = cellfun (fcn, mat2cell (vals(:)(idx), diff ([0; jdx])));
       subs = subs(jdx, :);
       mode = "unique";
     else
@@ -264,7 +267,7 @@
 
     ## Some built-in reductions handled efficiently.
 
-    if (func == @sum)
+    if (fcn == @sum)
       ## Fast summation.
       if (isempty (sz))
         A = __accumarray_sum__ (subs, vals);
@@ -280,7 +283,7 @@
         mask(subs) = false;
         A(mask) = fillval;
       endif
-    elseif (func == @max)
+    elseif (fcn == @max)
       ## Fast maximization.
 
       if (isinteger (vals))
@@ -307,7 +310,7 @@
         mask(subs) = false;
         A(mask) = fillval;
       endif
-    elseif (func == @min)
+    elseif (fcn == @min)
       ## Fast minimization.
 
       if (isinteger (vals))
@@ -355,8 +358,8 @@
       ## Optimize the case when function is @(x) {x}, i.e., we just want
       ## to collect the values to cells.
       persistent simple_cell_str = func2str (@(x) {x});
-      if (! strcmp (func2str (func), simple_cell_str))
-        vals = cellfun (func, vals);
+      if (! strcmp (func2str (fcn), simple_cell_str))
+        vals = cellfun (fcn, vals);
       endif
 
       subs = subs(jdx);
@@ -455,9 +458,9 @@
 %!   assert (accumarray (zeros (0, 1), [], [] , funcs{idx}), zeros (0, 1));
 %! endfor
 
-## Matlab returns an array of doubles even though FUNC returns cells.  In
+## Matlab returns an array of doubles even though FCN returns cells.  In
 ## Octave, we do not have that bug, at least for this case.
 %!assert (accumarray (zeros (0, 1), [], [0 1] , @(x) {x}), cell (0, 1))
 
-%!error <FUNC must be a function handle>
+%!error <FCN must be a function handle>
 %! accumarray ([1; 2; 3], [1; 2; 3], [3 1], '@(x) {x}')
--- a/scripts/general/accumdim.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/general/accumdim.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,11 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} accumdim (@var{subs}, @var{vals}, @var{dim}, @var{n}, @var{func}, @var{fillval})
+## @deftypefn  {} {@var{A} =} accumdim (@var{subs}, @var{vals})
+## @deftypefnx {} {@var{A} =} accumdim (@var{subs}, @var{vals}, @var{dim})
+## @deftypefnx {} {@var{A} =} accumdim (@var{subs}, @var{vals}, @var{dim}, @var{n})
+## @deftypefnx {} {@var{A} =} accumdim (@var{subs}, @var{vals}, @var{dim}, @var{n}, @var{fcn})
+## @deftypefnx {} {@var{A} =} accumdim (@var{subs}, @var{vals}, @var{dim}, @var{n}, @var{fcn}, @var{fillval})
 ## Create an array by accumulating the slices of an array into the
 ## positions defined by their subscripts along a specified dimension.
 ##
@@ -39,7 +43,7 @@
 ##
 ## The default action of @code{accumdim} is to sum the subarrays with the
 ## same subscripts.  This behavior can be modified by defining the
-## @var{func} function.  This should be a function or function handle
+## @var{fcn} function.  This should be a function or function handle
 ## that accepts an array and a dimension, and reduces the array along
 ## this dimension.  As a special exception, the built-in @code{min} and
 ## @code{max} functions can be used directly, and @code{accumdim}
@@ -65,7 +69,7 @@
 ## @seealso{accumarray}
 ## @end deftypefn
 
-function A = accumdim (subs, vals, dim, n = 0, func = [], fillval = 0)
+function A = accumdim (subs, vals, dim, n = 0, fcn = [], fillval = 0)
 
   if (nargin < 2)
     print_usage ();
@@ -104,7 +108,7 @@
     error ("accumdim: dimension mismatch");
   endif
 
-  if (isempty (func) || func == @sum)
+  if (isempty (fcn) || fcn == @sum)
     ## Fast summation case.
     A = __accumdim_sum__ (subs, vals, dim, n);
 
@@ -133,10 +137,10 @@
   subsc{dim} = idx;
   vals = mat2cell (vals(subsc{:}), szc{:});
   ## Apply reductions.  Special case min, max.
-  if (func == @min || func == @max)
-    vals = cellfun (func, vals, {[]}, {dim}, "uniformoutput", false);
+  if (fcn == @min || fcn == @max)
+    vals = cellfun (fcn, vals, {[]}, {dim}, "uniformoutput", false);
   else
-    vals = cellfun (func, vals, {dim}, "uniformoutput", false);
+    vals = cellfun (fcn, vals, {dim}, "uniformoutput", false);
   endif
   subs = subs(jdx);
 
--- a/scripts/general/bincoeff.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/general/bincoeff.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} bincoeff (@var{n}, @var{k})
+## @deftypefn {} {@var{b} =} bincoeff (@var{n}, @var{k})
 ## Return the binomial coefficient of @var{n} and @var{k}.
 ##
 ## The binomial coefficient is defined as
--- a/scripts/general/bitcmp.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/general/bitcmp.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} bitcmp (@var{A}, @var{k})
+## @deftypefn {} {@var{C} =} bitcmp (@var{A}, @var{k})
 ## Return the @var{k}-bit complement of integers in @var{A}.
 ##
 ## If @var{k} is omitted @code{k = log2 (flintmax) + 1} is assumed.
--- a/scripts/general/bitget.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/general/bitget.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,9 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {@var{c} =} bitget (@var{A}, @var{n})
-## Return the status of bit(s) @var{n} of the unsigned integers in @var{A}.
+## @deftypefn {} {@var{b} =} bitget (@var{A}, @var{n})
+## Return the bit value at position(s) @var{n} of the unsigned integers in
+## @var{A}.
 ##
 ## The least significant bit is @var{n} = 1.
 ##
@@ -40,7 +41,7 @@
 
 ## Liberally based of the version by Kai Habel from Octave Forge
 
-function C = bitget (A, n)
+function b = bitget (A, n)
 
   if (nargin != 2)
     print_usage ();
@@ -87,7 +88,7 @@
     error ("bitget: N must be in the range [1,%d]", Amax);
   endif
 
-  C = bitand (A, bitshift (_conv (1), uint8 (n) - uint8 (1))) != _conv (0);
+  b = bitand (A, bitshift (_conv (1), uint8 (n) - uint8 (1))) != _conv (0);
 
 endfunction
 
--- a/scripts/general/bitset.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/general/bitset.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,9 +24,9 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {@var{C} =} bitset (@var{A}, @var{n})
-## @deftypefnx {} {@var{C} =} bitset (@var{A}, @var{n}, @var{val})
-## Set or reset bit(s) @var{n} of the unsigned integers in @var{A}.
+## @deftypefn  {} {@var{B} =} bitset (@var{A}, @var{n})
+## @deftypefnx {} {@var{B} =} bitset (@var{A}, @var{n}, @var{val})
+## Set or reset bit(s) at position @var{n} of the unsigned integers in @var{A}.
 ##
 ## The least significant bit is @var{n} = 1.  @w{@var{val} = 0} resets bits and
 ## @w{@var{val} = 1} sets bits.  If no @var{val} is specified it defaults to
@@ -62,7 +62,7 @@
 ## @seealso{bitand, bitor, bitxor, bitget, bitcmp, bitshift, intmax, flintmax}
 ## @end deftypefn
 
-function C = bitset (A, n, val = true)
+function B = bitset (A, n, val = true)
 
   if (nargin < 2)
     print_usage ();
@@ -79,28 +79,28 @@
 
   ## Special case of empty input
   if (isempty (A))
-    C = [];
+    B = [];
     return;
   endif
 
   sz = size (A);
-  cl = class (A);
+  cls = class (A);
 
   if (isfloat (A) && isreal (A))
-    Bmax = flintmax (cl);
+    Bmax = flintmax (cls);
     Amax = ceil (log2 (Bmax));
   elseif (isinteger (A))
-    Bmax = intmax (cl);
+    Bmax = intmax (cls);
     Amax = ceil (log2 (Bmax));
   else
-    error ("bitset: invalid class %s", cl);
+    error ("bitset: invalid class %s", cls);
   endif
 
-  if (any ((n < 1)(:)) || any ((n > Amax)(:)))
+  if (any (n(:) < 1) || any (n(:) > Amax))
     error ("bitset: N must be in the range [1,%d]", Amax);
   endif
 
-  mask = bitshift (cast (1, cl), uint8 (n) - uint8 (1));
+  mask = bitshift (cast (1, cls), uint8 (n) - uint8 (1));
 
   on = logical (val);
   off = ! on;
@@ -113,9 +113,9 @@
     offmask = mask(off);
   endif
 
-  C = zeros (sz, cl);
-  C(on) = bitor (A(on), onmask);
-  C(off) = bitand (A(off), bitcmp (offmask));
+  B = zeros (sz, cls);
+  B(on) = bitor (A(on), onmask);
+  B(off) = bitand (A(off), bitcmp (offmask));
 
 endfunction
 
@@ -131,6 +131,7 @@
 %!   endfor
 %! endfor
 
+## Special case of empty input
 %!assert (bitset ([], 1), [])
 
 %!assert <*36458> (bitset (uint8 ([1, 2;3 4]), 1, [0 1; 0 1]),
@@ -145,16 +146,16 @@
 %!error <Invalid call> bitset ()
 %!error <Invalid call> bitset (1)
 %!error <A must be .= 0> bitset (-1, 2)
+%!error <must be the same size or scalar> bitset ([1 2], [1 2 3])
 %!error <must be the same size or scalar> bitset (1, [1 2], [1 2 3])
-%!error <must be the same size or scalar> bitset ([1 2], [1 2 3])
 %!error <invalid class char> bitset ("1", 2)
 %!error <N must be in the range \[1,53\]> bitset (0, 0)
 %!error <N must be in the range \[1,53\]> bitset (0, 55)
 %!error <N must be in the range \[1,24\]> bitset (single (0), 0)
 %!error <N must be in the range \[1,24\]> bitset (single (0), 26)
-%!error <N must be in the range \[1,8\]> bitset (uint8 (0), 0)
+%!error <N must be in the range \[1,7\]> bitset (int8 (0), 0)
+%!error <N must be in the range \[1,7\]> bitset (int8 (0), 9)
 %!error <N must be in the range \[1,8\]> bitset (uint8 (0), 9)
-%!error <N must be in the range \[1,7\]> bitset (int8 (0), 9)
 %!error <N must be in the range \[1,15\]> bitset (int16 (0), 17)
 %!error <N must be in the range \[1,16\]> bitset (uint16 (0), 17)
 %!error <N must be in the range \[1,31\]> bitset (int32 (0), 33)
--- a/scripts/general/blkdiag.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/general/blkdiag.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} blkdiag (@var{A}, @var{B}, @var{C}, @dots{})
+## @deftypefn {} {@var{M} =} blkdiag (@var{A}, @var{B}, @var{C}, @dots{})
 ## Build a block diagonal matrix from @var{A}, @var{B}, @var{C}, @dots{}
 ##
 ## All arguments must be numeric and either two-dimensional matrices or
@@ -32,7 +32,7 @@
 ## @seealso{diag, horzcat, vertcat, sparse}
 ## @end deftypefn
 
-function retval = blkdiag (varargin)
+function M = blkdiag (varargin)
 
   if (nargin < 1)
     print_usage ();
@@ -53,15 +53,15 @@
   csz = cumsum ([0 0; tmp], 1);
 
   if (any (cellfun ("issparse", varargin)))
-    retval = sparse (csz(end,1), csz(end,2));
+    M = sparse (csz(end,1), csz(end,2));
   else
-    retval = zeros (csz(end,:));
+    M = zeros (csz(end,:));
   endif
 
   for p = 1:nargin
     vp = varargin{p};
     if (! isempty (vp))
-      retval((csz(p,1)+1):csz(p+1,1),(csz(p,2)+1):csz(p+1,2)) = vp;
+      M((csz(p,1)+1):csz(p+1,1),(csz(p,2)+1):csz(p+1,2)) = vp;
     endif
   endfor
 
--- a/scripts/general/celldisp.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/general/celldisp.m	Mon Aug 29 13:58:00 2022 +0200
@@ -51,7 +51,7 @@
 ## @seealso{disp}
 ## @end deftypefn
 
-## This is ugly, but seems to be what matlab does..
+## This is ugly, but seems to be what Matlab does..
 
 function celldisp (c, name)
 
--- a/scripts/general/cplxpair.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/general/cplxpair.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,9 +24,9 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} cplxpair (@var{z})
-## @deftypefnx {} {} cplxpair (@var{z}, @var{tol})
-## @deftypefnx {} {} cplxpair (@var{z}, @var{tol}, @var{dim})
+## @deftypefn  {} {@var{zsort} =} cplxpair (@var{z})
+## @deftypefnx {} {@var{zsort} =} cplxpair (@var{z}, @var{tol})
+## @deftypefnx {} {@var{zsort} =} cplxpair (@var{z}, @var{tol}, @var{dim})
 ## Sort the numbers @var{z} into complex conjugate pairs ordered by increasing
 ## real part.
 ##
@@ -57,14 +57,14 @@
 
 ## 2006-05-12 David Bateman - Modified for NDArrays
 
-function y = cplxpair (z, tol, dim)
+function zsort = cplxpair (z, tol, dim)
 
   if (nargin < 1)
     print_usage ();
   endif
 
   if (isempty (z))
-    y = zeros (size (z));
+    zsort = zeros (size (z));
     return;
   endif
 
@@ -108,7 +108,7 @@
   [~, idx] = sort (q, 1);
   midx = idx + rows (idx) * ones (rows (idx), 1) * [0:columns(idx)-1];
   z = z(midx);
-  y = z;
+  zsort = z;
 
   ## For each remaining z, place the value and its conjugate at the start of
   ## the returned list, and remove them from further consideration.
@@ -125,16 +125,16 @@
       ## For pairs, select the one with positive imaginary part and use it and
       ## it's conjugate, but list the negative imaginary pair first.
       if (imag (z(i,j)) > 0)
-        y([i, i+1],j) = [conj(z(i,j)), z(i,j)];
+        zsort([i, i+1],j) = [conj(z(i,j)), z(i,j)];
       else
-        y([i, i+1],j) = [conj(z(idx+i,j)), z(idx+i,j)];
+        zsort([i, i+1],j) = [conj(z(idx+i,j)), z(idx+i,j)];
       endif
       z(idx+i,j) = z(i+1,j);
     endfor
   endfor
 
   ## Reshape the output matrix.
-  y = ipermute (reshape (y, sz), perm);
+  zsort = ipermute (reshape (zsort, sz), perm);
 
 endfunction
 
--- a/scripts/general/dblquad.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/general/dblquad.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,10 +24,10 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} dblquad (@var{f}, @var{xa}, @var{xb}, @var{ya}, @var{yb})
-## @deftypefnx {} {} dblquad (@var{f}, @var{xa}, @var{xb}, @var{ya}, @var{yb}, @var{tol})
-## @deftypefnx {} {} dblquad (@var{f}, @var{xa}, @var{xb}, @var{ya}, @var{yb}, @var{tol}, @var{quadf})
-## @deftypefnx {} {} dblquad (@var{f}, @var{xa}, @var{xb}, @var{ya}, @var{yb}, @var{tol}, @var{quadf}, @dots{})
+## @deftypefn  {} {@var{q} =} dblquad (@var{f}, @var{xa}, @var{xb}, @var{ya}, @var{yb})
+## @deftypefnx {} {@var{q} =} dblquad (@var{f}, @var{xa}, @var{xb}, @var{ya}, @var{yb}, @var{tol})
+## @deftypefnx {} {@var{q} =} dblquad (@var{f}, @var{xa}, @var{xb}, @var{ya}, @var{yb}, @var{tol}, @var{quadf})
+## @deftypefnx {} {@var{q} =} dblquad (@var{f}, @var{xa}, @var{xb}, @var{ya}, @var{yb}, @var{tol}, @var{quadf}, @dots{})
 ## Numerically evaluate the double integral of @var{f}.
 ##
 ## @var{f} is a function handle, inline function, or string containing the name
--- a/scripts/general/flip.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/general/flip.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,9 +24,9 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} flip (@var{x})
-## @deftypefnx {} {} flip (@var{x}, @var{dim})
-## Return a copy of array @var{x} flipped across dimension @var{dim}.
+## @deftypefn  {} {@var{B} =} flip (@var{A})
+## @deftypefnx {} {@var{B} =} flip (@var{A}, @var{dim})
+## Return a copy of array @var{A} flipped across dimension @var{dim}.
 ##
 ## If @var{dim} is unspecified it defaults to the first non-singleton
 ## dimension.
@@ -59,14 +59,14 @@
 ## @seealso{fliplr, flipud, rot90, rotdim, permute, transpose}
 ## @end deftypefn
 
-function y = flip (x, dim)
+function B = flip (A, dim)
 
   if (nargin < 1)
     print_usage ();
   endif
 
-  nd = ndims (x);
-  sz = size (x);
+  nd = ndims (A);
+  sz = size (A);
   if (nargin == 1)
     ## Find the first non-singleton dimension.
     (dim = find (sz > 1, 1)) || (dim = 1);
@@ -75,8 +75,8 @@
   endif
 
   idx(1:max(nd, dim)) = {':'};
-  idx{dim} = size (x, dim):-1:1;
-  y = x(idx{:});
+  idx{dim} = size (A, dim):-1:1;
+  B = A(idx{:});
 
 endfunction
 
--- a/scripts/general/fliplr.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/general/fliplr.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,11 +24,11 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} fliplr (@var{x})
+## @deftypefn {} {@var{B} =} fliplr (@var{A})
 ## Flip array left to right.
 ##
-## Return a copy of @var{x} with the order of the columns reversed.  In other
-## words, @var{x} is flipped left-to-right about a vertical axis.  For example:
+## Return a copy of @var{A} with the order of the columns reversed.  In other
+## words, @var{A} is flipped left-to-right about a vertical axis.  For example:
 ##
 ## @example
 ## @group
@@ -41,13 +41,13 @@
 ## @seealso{flipud, flip, rot90, rotdim}
 ## @end deftypefn
 
-function y = fliplr (x)
+function B = fliplr (A)
 
   if (nargin < 1)
     print_usage ();
   endif
 
-  y = flip (x, 2);
+  B = flip (A, 2);
 
 endfunction
 
--- a/scripts/general/flipud.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/general/flipud.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,11 +24,11 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} flipud (@var{x})
+## @deftypefn {} {@var{B} =} flipud (@var{A})
 ## Flip array upside down.
 ##
-## Return a copy of @var{x} with the order of the rows reversed.  In other
-## words, @var{x} is flipped upside-down about a horizontal axis.  For example:
+## Return a copy of @var{A} with the order of the rows reversed.  In other
+## words, @var{A} is flipped upside-down about a horizontal axis.  For example:
 ##
 ## @example
 ## @group
@@ -41,12 +41,12 @@
 ## @seealso{fliplr, flip, rot90, rotdim}
 ## @end deftypefn
 
-function y = flipud (x)
+function B = flipud (A)
 
   if (nargin < 1)
     print_usage ();
   endif
-  y = flip (x, 1);
+  B = flip (A, 1);
 
 endfunction
 
--- a/scripts/general/idivide.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/general/idivide.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,10 +24,10 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} idivide (@var{x}, @var{y}, @var{op})
+## @deftypefn {} {@var{C} =} idivide (@var{A}, @var{B}, @var{op})
 ## Integer division with different rounding rules.
 ##
-## The standard behavior of integer division such as @code{@var{a} ./ @var{b}}
+## The standard behavior of integer division such as @code{@var{A} ./ @var{B}}
 ## is to round the result to the nearest integer.  This is not always the
 ## desired behavior and @code{idivide} permits integer element-by-element
 ## division to be performed with different treatment for the fractional
@@ -36,19 +36,19 @@
 ##
 ## @table @asis
 ## @item @qcode{"fix"}
-## Calculate @code{@var{a} ./ @var{b}} with the fractional part rounded
+## Calculate @code{@var{A} ./ @var{B}} with the fractional part rounded
 ## towards zero.
 ##
 ## @item @qcode{"round"}
-## Calculate @code{@var{a} ./ @var{b}} with the fractional part rounded
+## Calculate @code{@var{A} ./ @var{B}} with the fractional part rounded
 ## towards the nearest integer.
 ##
 ## @item @qcode{"floor"}
-## Calculate @code{@var{a} ./ @var{b}} with the fractional part rounded
+## Calculate @code{@var{A} ./ @var{B}} with the fractional part rounded
 ## towards negative infinity.
 ##
 ## @item @qcode{"ceil"}
-## Calculate @code{@var{a} ./ @var{b}} with the fractional part rounded
+## Calculate @code{@var{A} ./ @var{B}} with the fractional part rounded
 ## towards positive infinity.
 ## @end table
 ##
@@ -69,10 +69,10 @@
 ## @end group
 ## @end example
 ##
-## @seealso{ldivide, rdivide}
+## @seealso{ceil, floor, fix, round, ldivide, rdivide}
 ## @end deftypefn
 
-function z = idivide (x, y, op)
+function C = idivide (A, B, op)
 
   if (nargin < 2)
     print_usage ();
@@ -84,74 +84,74 @@
     op = tolower (op);
   endif
 
-  if (! isinteger (x) && ! isinteger (y))
-    error ("idivide: at least one input (X or Y) must be an integer type");
-  elseif (isinteger (x) && isinteger (y) && ! strcmp (class (x), class (y)))
-    error ("idivide: integer type of X (%s) must match integer type of Y (%s)",
-           class (x), class (y));
+  if (! isinteger (A) && ! isinteger (B))
+    error ("idivide: at least one input (A or B) must be an integer type");
+  elseif (isinteger (A) && isinteger (B) && ! strcmp (class (A), class (B)))
+    error ("idivide: integer type of A (%s) must match integer type of B (%s)",
+           class (A), class (B));
   endif
 
-  z = x ./ y;
+  C = A ./ B;
   if (strcmp (op, "fix"))
-    ## The following is an optimized version of `z -= (z .* y > x) .* sign (y)`.
-    if (isscalar (y))
-      if (y > 0)
-        z -= (z * y > x);
+    ## The following is an optimized version of `C -= (C .* B > A) .* sign (B)`.
+    if (isscalar (B))
+      if (B > 0)
+        C -= (C * B > A);
       else
-        z += (z * y > x);
+        C += (C * B > A);
       endif
     else
-      y_sel = (y > 0);
-      if (isscalar (x))
-        z(y_sel) -= (z(y_sel) .* y(y_sel) > x);
+      y_sel = (B > 0);
+      if (isscalar (A))
+        C(y_sel) -= (C(y_sel) .* B(y_sel) > A);
         y_sel = ! y_sel;
-        z(y_sel) += (z(y_sel) .* y(y_sel) > x);
+        C(y_sel) += (C(y_sel) .* B(y_sel) > A);
       else
-        z(y_sel) -= (z(y_sel) .* y(y_sel) > x(y_sel));
+        C(y_sel) -= (C(y_sel) .* B(y_sel) > A(y_sel));
         y_sel = ! y_sel;
-        z(y_sel) += (z(y_sel) .* y(y_sel) > x(y_sel));
+        C(y_sel) += (C(y_sel) .* B(y_sel) > A(y_sel));
       endif
     endif
   elseif (strcmp (op, "round"))
     return;
   elseif (strcmp (op, "floor"))
-    ## The following is an optimized version of `z -= (z .* abs (y) > sign (y) .* x)`.
-    if (isscalar (y))
-      if (y > 0)
-        z -= (z * y > x);
+    ## The following is an optimized version of `C -= (C .* abs (B) > sign (B) .* A)`.
+    if (isscalar (B))
+      if (B > 0)
+        C -= (C * B > A);
       else
-        z -= (z * y < x);
+        C -= (C * B < A);
       endif
     else
-      y_sel = (y > 0);
-      if (isscalar (x))
-        z(y_sel) -= (z(y_sel) .* y(y_sel) > x);
+      y_sel = (B > 0);
+      if (isscalar (A))
+        C(y_sel) -= (C(y_sel) .* B(y_sel) > A);
         y_sel = ! y_sel;
-        z(y_sel) -= (z(y_sel) .* y(y_sel) < x);
+        C(y_sel) -= (C(y_sel) .* B(y_sel) < A);
       else
-        z(y_sel) -= (z(y_sel) .* y(y_sel) > x(y_sel));
+        C(y_sel) -= (C(y_sel) .* B(y_sel) > A(y_sel));
         y_sel = ! y_sel;
-        z(y_sel) -= (z(y_sel) .* y(y_sel) < x(y_sel));
+        C(y_sel) -= (C(y_sel) .* B(y_sel) < A(y_sel));
       endif
     endif
   elseif (strcmp (op, "ceil"))
-    ## The following is an optimized version of `z += (z .* abs (y) < sign (y) .* x)`.
-    if (isscalar (y))
-      if (y > 0)
-        z += (z * y < x);
+    ## The following is an optimized version of `C += (C .* abs (B) < sign (B) .* A)`.
+    if (isscalar (B))
+      if (B > 0)
+        C += (C * B < A);
       else
-        z += (z * y > x);
+        C += (C * B > A);
       endif
     else
-      y_sel = (y > 0);
-      if (isscalar (x))
-        z(y_sel) += (z(y_sel) .* y(y_sel) < x);
+      y_sel = (B > 0);
+      if (isscalar (A))
+        C(y_sel) += (C(y_sel) .* B(y_sel) < A);
         y_sel = ! y_sel;
-        z(y_sel) += (z(y_sel) .* y(y_sel) > x);
+        C(y_sel) += (C(y_sel) .* B(y_sel) > A);
       else
-        z(y_sel) += (z(y_sel) .* y(y_sel) < x(y_sel));
+        C(y_sel) += (C(y_sel) .* B(y_sel) < A(y_sel));
         y_sel = ! y_sel;
-        z(y_sel) += (z(y_sel) .* y(y_sel) > x(y_sel));
+        C(y_sel) += (C(y_sel) .* B(y_sel) > A(y_sel));
       endif
     endif
   else
@@ -201,5 +201,5 @@
 %!error idivide (uint8 (1), 2, 3)
 %!error <at least one input> idivide (1, 2)
 %!error <at least one input> idivide ({1}, 2)
-%!error <X \(int8\) must match.* Y \(uint8\)> idivide (int8 (1), uint8 (2))
+%!error <A \(int8\) must match.* B \(uint8\)> idivide (int8 (1), uint8 (2))
 %!error <unrecognized rounding type "foo"> idivide (int8 (1), 2, "foo")
--- a/scripts/general/int2str.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/general/int2str.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} int2str (@var{n})
+## @deftypefn {} {@var{str} =} int2str (@var{n})
 ## Convert an integer (or array of integers) to a string (or a character
 ## array).
 ##
@@ -58,7 +58,7 @@
 ## @seealso{sprintf, num2str, mat2str}
 ## @end deftypefn
 
-function retval = int2str (n)
+function str = int2str (n)
 
   if (nargin < 1)
     print_usage ();
@@ -67,10 +67,10 @@
   endif
 
   if (ischar (n))
-    retval = n;
+    str = n;
     return;
   elseif (isempty (n))
-    retval = "";
+    str = "";
     return;
   endif
 
@@ -96,7 +96,7 @@
   n  = permute (n, [2, 3:nd, 1]);
   fmt = [repmat(fmt, 1, nc), "\n"];
   strtmp = sprintf (fmt, n);
-  retval = strtrim (char (ostrsplit (strtmp, "\n", true)));
+  str = strtrim (char (ostrsplit (strtmp, "\n", true)));
 
 endfunction
 
--- a/scripts/general/integral.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/general/integral.m	Mon Aug 29 13:58:00 2022 +0200
@@ -26,16 +26,16 @@
 ## -*- texinfo -*-
 ## @deftypefn  {} {@var{q} =} integral (@var{f}, @var{a}, @var{b})
 ## @deftypefnx {} {@var{q} =} integral (@var{f}, @var{a}, @var{b}, @var{prop}, @var{val}, @dots{})
+## @deftypefnx {} {[@var{q}, @var{err}] =} integral (@dots{})
 ##
 ## Numerically evaluate the integral of @var{f} from @var{a} to @var{b} using
 ## adaptive quadrature.
 ##
 ## @code{integral} is a wrapper for @code{quadcc} (general real-valued, scalar
-## integrands and limits), @code{quadgk} (integrals with specified integration
-## paths), and @code{quadv} (array-valued integrands) that is intended to
-## provide @sc{matlab} compatibility.  More control of the numerical
-## integration may be achievable by calling the various quadrature functions
-## directly.
+## integrands and limits), and @code{quadgk} (integrals with specified
+## integration paths and array-valued integrands) that is intended to provide
+## @sc{matlab} compatibility.  More control of the numerical integration may be
+## achievable by calling the various quadrature functions directly.
 ##
 ## @var{f} is a function handle, inline function, or string containing the name
 ## of the function to evaluate.  The function @var{f} must be vectorized and
@@ -62,7 +62,7 @@
 ## @var{arrayvalued} is specified as true.  This option will cause
 ## @code{integral} to perform the integration over the entire array and return
 ## @var{q} with the same dimensions as returned by @var{f}.  For more detail
-## @pxref{XREFquadv,,@code{quadv}}.
+## @pxref{XREFquadgk,,@code{quadgk}}.
 ##
 ## @item AbsTol
 ## Define the absolute error tolerance for the quadrature.  The default
@@ -73,6 +73,9 @@
 ## relative tolerance is 1e-6 (1e-4 for single).
 ## @end table
 ##
+## The optional output @var{err} contains the absolute error estimate used by
+## the called integrator.
+##
 ## Adaptive quadrature is used to minimize the estimate of error until the
 ## following is satisfied:
 ## @tex
@@ -98,25 +101,21 @@
 ## above.  If tighter tolerances are desired they must be specified.
 ## @sc{matlab} leaves the tighter tolerances appropriate for @code{double}
 ## inputs in place regardless of the class of the integration limits.
-##
-## @item
-## As a consequence of using @code{quadcc}, @code{quadgk}, and @code{quadv},
-## certain option combinations are not supported.  Currently,
-## @qcode{"ArrayValued"} cannot be combined with @qcode{"RelTol"} or
-## @qcode{"Waypoints"}.
 ## @end enumerate
 ##
 ## @seealso{integral2, integral3, quad, quadgk, quadv, quadl, quadcc, trapz,
 ##          dblquad, triplequad}
 ## @end deftypefn
 
-function q = integral (f, a, b, varargin)
+function [q, err] = integral (f, a, b, varargin)
 
   if (nargin < 3 || (mod (nargin, 2) == 0))
     print_usage ();
   endif
 
-  ## quadcc can't handle complex limits or integrands, but quadgk & quadv can.
+  error_flag = (nargout == 2);
+
+  ## quadcc can't handle complex limits or integrands, but quadgk can.
   ## Check for simple cases of complex limits and integrand.
   f_is_complex = false;
   if (iscomplex (a) || iscomplex (b))
@@ -130,11 +129,19 @@
     ## Let quadcc function handle input checks on function and limits.
     if (! f_is_complex)
       try
-        q = quadcc (f, a, b);
+        if (error_flag)
+          [q, err] = quadcc (f, a, b);
+        else
+          q = quadcc (f, a, b);
+        endif
       catch quaderror
         if (strcmp (quaderror.message,
-                    "quadcc: integrand F must return a single, real-valued vector"))
-          q = quadgk (f, a, b);
+                "quadcc: integrand F must return a single, real-valued vector"))
+          if (error_flag)
+            [q, err] = quadgk (f, a, b);
+          else
+            q = quadgk (f, a, b);
+          endif
         else
           error (quaderror.message);
         endif
@@ -142,7 +149,11 @@
 
     else
       ## Complex-valued integral
-      q = quadgk (f, a, b);
+      if (error_flag)
+        [q, err] = quadgk (f, a, b);
+      else
+        q = quadgk (f, a, b);
+      endif
     endif
 
   else
@@ -151,6 +162,7 @@
     reltol = [];
     waypoints = [];
     arrayvalued = false;
+    use_quadgk = false;
 
     idx = 1;
     while (idx < nargin - 3)
@@ -166,8 +178,10 @@
           abstol = varargin{idx++};
         case "waypoints"
           waypoints = varargin{idx++}(:);
+          use_quadgk = true;
         case "arrayvalued"
           arrayvalued = varargin{idx++};
+          use_quadgk = true;
         otherwise
           error ("integral: unknown property '%s'", prop);
       endswitch
@@ -176,51 +190,50 @@
     issingle = (isa (a, "single") || isa (b, "single")
                 || isa (waypoints, "single"));
 
-    if (arrayvalued)
-      ## Pass vector-valued function to quadv, checking for conflicting params
-
-      ## FIXME: Replace warning when have array compatible call with waypoints
-      if (! isempty (waypoints))
-        warning (["integral: array-valued quadrature routine currently ", ...
-                 "unable to handle WayPoints.  WayPoints are ignored."]);
-      endif
+    if (isempty (abstol))
+      abstol = ifelse (issingle, 1e-5, 1e-10);
+    endif
+    if (isempty (reltol))
+      reltol = ifelse (issingle, 1e-4, 1e-6);
+    endif
 
-      ## FIXME: Remove warning once we have reltol compatible arrayval'd quadfn
-      if (! isempty (reltol))
-        warning (["integral: array-valued quadrature only accepts AbsTol.", ...
-                 "  RelTol ignored."]);
+    if (use_quadgk)
+      ## Array valued functions or waypoint definitions require quadgk
+      ## no need to test for complex components
+      if (error_flag)
+        [q, err] = quadgk (f, a, b, "AbsTol", abstol, "RelTol", reltol,
+                            "WayPoints", waypoints, "ArrayValued", arrayvalued);
+      else
+        q = quadgk (f, a, b, "AbsTol", abstol, "RelTol", reltol,
+                            "WayPoints", waypoints, "ArrayValued", arrayvalued);
       endif
-      if (isempty (abstol))
-        abstol = ifelse (issingle, 1e-5, 1e-10);
-      endif
-
-      q = quadv (f, a, b, abstol);
 
     else
-      if (isempty (abstol))
-        abstol = ifelse (issingle, 1e-5, 1e-10);
-      endif
-      if (isempty (reltol))
-        reltol = ifelse (issingle, 1e-4, 1e-6);
-      endif
-
-      if (! isempty (waypoints))
-        q = quadgk (f, a, b, "AbsTol", abstol, "RelTol", reltol,
-                             "WayPoints", waypoints);
+      ## otherwise try quadcc first, switch to quadgk if complex test fails
+      if (! f_is_complex)
+        try
+          if (error_flag)
+            [q, err] = quadcc (f, a, b, [abstol, reltol]);
+          else
+            q = quadcc (f, a, b, [abstol, reltol]);
+          endif
+        catch quaderror
+          if (strcmp (quaderror.message,
+                "quadcc: integrand F must return a single, real-valued vector"))
+            if (error_flag)
+              [q, err] = quadgk (f, a, b, "AbsTol", abstol, "RelTol", reltol);
+            else
+              q = quadgk (f, a, b, "AbsTol", abstol, "RelTol", reltol);
+            endif
+          else
+            error (quaderror.message);
+          endif
+        end_try_catch
       else
-        if (! f_is_complex)
-          try
-            q = quadcc (f, a, b, [abstol, reltol]);
-          catch quaderror
-            if (strcmp (quaderror.message,
-                        "quadcc: integrand F must return a single, real-valued vector"))
-              q = quadgk (f, a, b, "AbsTol", abstol, "RelTol", reltol);
-            else
-              error (quaderror.message);
-            endif
-          end_try_catch
+        ## Complex-valued integral
+        if (error_flag)
+          [q, err] = quadgk (f, a, b, "AbsTol", abstol, "RelTol", reltol);
         else
-          ## Complex-valued integral
           q = quadgk (f, a, b, "AbsTol", abstol, "RelTol", reltol);
         endif
       endif
@@ -296,15 +309,26 @@
 %!assert (integral (@(z) log (z),1+1i,1+1i, "WayPoints", [1-1i, -1,-1i, -1+1i]),
 %!        complex (0, pi), 1e-10)
 
-## tests from quadv
 ## Test vector-valued functions
 %!assert (integral (@(x) [(sin (x)), (sin (2*x))], 0, pi, "ArrayValued", 1),
 %!        [2, 0], 1e-10)
 
 ## Test matrix-valued functions
-%!test
-%! assert (integral (@(x) [x,x,x; x,exp(x),x; x,x,x], 0, 1, "ArrayValued", 1),
-%!         [0.5,0.5,0.5; 0.5,(exp (1) - 1),0.5; 0.5,0.5,0.5], 1e-10);
+%!assert (integral (@(x) [x,x,x; x,exp(x),x; x,x,x], 0, 1, "ArrayValued", 1),
+%!                    [0.5,0.5,0.5; 0.5,(exp (1) - 1),0.5; 0.5,0.5,0.5], 1e-10);
+
+## Test combined parameters
+%!assert (integral (@(x) [sin(x), cos(x)], 0, pi, "ArrayValued", 1,
+%!                   "Waypoints", [0.5]), [2, 0], 2*eps);
+
+##test 2nd output
+%!test <*62412>
+%! [~, err] = integral (@(x) ones (size (x)), 0, 1);  # quadcc
+%! assert (err, 0, 5*eps);  # err ~3e-16
+%! [~, err] = integral (@(x) ones (size (x)), 0, 1, "waypoints", 1);  # quadgk
+%! assert (err, 0, 1000*eps);  # err ~7e-14
+%! [~, err] = integral (@(x) ones (size (x)), 0, 1, "arrayvalued", true);  # quadgk
+%! assert (err, 0, 1000*eps);  # err ~7e-14
 
 ## Test input validation
 %!error integral (@sin)
--- a/scripts/general/interp2.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/general/interp2.m	Mon Aug 29 13:58:00 2022 +0200
@@ -69,7 +69,8 @@
 ## interpolation with smooth first derivative.
 ##
 ## @item @qcode{"cubic"}
-## Cubic interpolation (same as @qcode{"pchip"}).
+## Cubic interpolation using a convolution kernel function---third order
+## method with smooth first derivative.
 ##
 ## @item @qcode{"spline"}
 ## Cubic spline interpolation---smooth first and second derivatives
@@ -149,7 +150,7 @@
     ## Calculate the interleaved input vectors.
     p = 2^n;
     XI = (p:p*zc)/p;
-    YI = (p:p*zr)'/p;
+    YI = (p:p*zr).'/p;
   endif
   if (! isnumeric (XI) || ! isnumeric (YI))
     error ("interp2: XI, YI must be numeric");
@@ -180,7 +181,13 @@
     error ("interp2: Y must be strictly monotonic");
   endif
 
-  if (any (strcmp (method, {"nearest", "linear", "pchip", "cubic"})))
+  if (strcmp (method, "cubic") && (rows (Z) < 3 || columns (Z) < 3))
+    warning (["interp2: cubic requires at least 3 points in each " ...
+              "dimension.  Falling back to linear interpolation."]);
+    method = "linear";
+  endif
+
+  if (any (strcmp (method, {"nearest", "linear", "pchip"})))
 
     ## If Xi and Yi are vectors of different orientation build a grid
     if ((isrow (XI) && iscolumn (YI)) || (iscolumn (XI) && isrow (YI)))
@@ -244,30 +251,17 @@
       idx = sub2ind (size (Z), yidx+jj, xidx+ii);
       ZI = Z(idx);
 
-    elseif (strcmp (method, "pchip") || strcmp (method, "cubic"))
+    elseif (strcmp (method, "pchip"))
 
       if (length (X) < 2 || length (Y) < 2)
-        error ("interp2: %s requires at least 2 points in each dimension",
-               method);
+        error ("interp2: pchip requires at least 2 points in each dimension");
       endif
 
       ## first order derivatives
       DX = __pchip_deriv__ (X, Z, 2);
       DY = __pchip_deriv__ (Y, Z, 1);
       ## Compute mixed derivatives row-wise and column-wise.  Use the average.
-      DXY = (__pchip_deriv__ (X, DY, 2) + __pchip_deriv__ (Y, DX, 1))/2;
-
-      if (iscomplex (Z))
-        ## __pchip_deriv__ works only on real part.  Do it again for imag part.
-        ## FIXME: Adapt __pchip_deriv__ to correctly handle complex input.
-
-        ## first order derivatives
-        DX += 1i * __pchip_deriv__ (X, imag (Z), 2);
-        DY += 1i * __pchip_deriv__ (Y, imag (Z), 1);
-        ## Compute mixed derivatives row-wise and column-wise.  Use the average.
-        DXY += 1i * (__pchip_deriv__ (X, imag (DY), 2)
-                     + __pchip_deriv__ (Y, imag (DX), 1))/2;
-      endif
+      DXY = (__pchip_deriv__ (X, DY, 2) + __pchip_deriv__ (Y, DX, 1)) / 2;
 
       ## do the bicubic interpolation
       hx = diff (X); hx = hx(xidx);
@@ -304,19 +298,19 @@
       yb{1,1} = t2 + 1;
 
       ZI = zeros (size (XI));
-      for i = 1:2
-        for j = 1:2
-          zidx = sub2ind (size (Z), yidx+(j-1), xidx+(i-1));
-          ZI += xb{1,i} .* yb{1,j} .*   Z(zidx);
-          ZI += xb{2,i} .* yb{1,j} .*  DX(zidx);
-          ZI += xb{1,i} .* yb{2,j} .*  DY(zidx);
-          ZI += xb{2,i} .* yb{2,j} .* DXY(zidx);
+      for ix = 1:2
+        for iy = 1:2
+          zidx = sub2ind (size (Z), yidx+(iy-1), xidx+(ix-1));
+          ZI += xb{1,ix} .* yb{1,iy} .*   Z(zidx);
+          ZI += xb{2,ix} .* yb{1,iy} .*  DX(zidx);
+          ZI += xb{1,ix} .* yb{2,iy} .*  DY(zidx);
+          ZI += xb{2,ix} .* yb{2,iy} .* DXY(zidx);
         endfor
       endfor
 
     endif
 
-  else
+  else  # cubic or spline methods
 
     ## Check dimensions of XI and YI
     if (isvector (XI) && isvector (YI) && ! size_equal (XI, YI))
@@ -326,15 +320,50 @@
     endif
 
     if (strcmp (method, "spline"))
-      if (isgriddata (XI) && isgriddata (YI'))
+      if (isgriddata (XI) && isgriddata (YI.'))
         ZI = __splinen__ ({Y, X}, Z, {YI(:,1), XI(1,:)}, extrap, "spline");
       else
         error ("interp2: XI, YI must have uniform spacing ('meshgrid' format)");
       endif
-    endif
+      return;  # spline doesn't use extrapolation value (MATLAB compatibility)
+    elseif (strcmp (method, "cubic"))
+      ## reduce to vectors if interpolation points are a meshgrid
+      if (size_equal (XI, YI) && all (all (XI(1, :) == XI & YI(:, 1) == YI)))
+        XI = XI(1, :);
+        YI = YI(:, 1);
+      endif
+
+      ## make X a row vector
+      X = X.';
 
-    return; # spline doesn't need NA extrapolation value (MATLAB compatibility)
+      ## quadratic padding + additional zeros for the special case of copying
+      ## the last line (like x=1:5, xi=5, requires to have indices 6 and 7)
+      row_1 = 3*Z(1, :, :) - 3*Z(2, :, :) + Z(3, :, :);
+      row_end = 3*Z(end, :, :) - 3*Z(end-1, :, :) + Z(end-2, :, :);
+      ZI = [3*row_1(:, 1, :) - 3*row_1(:, 2, :) + row_1(:, 3, :), ...
+            row_1, ...
+            3*row_1(:, end, :) - 3*row_1(:, end-1, :) + row_1(:, end-2, :), ...
+            0;
+            #
+            3*Z(:, 1, :) - 3*Z(:, 2, :) + Z(:, 3, :), ...
+            Z, ...
+            3*Z(:, end, :) - 3*Z(:, end-1, :) + Z(:, end-2, :), ...
+            zeros(rows (Z), 1, size (Z, 3));
+            #
+            3*row_end(:, 1, :) - 3*row_end(:, 2, :) + row_end(:, 3, :), ...
+            row_end, ...
+            3*row_end(:, end, :) - 3*row_end(:, end-1, :) + row_end(:, end-2, :), ...
+            0;
+            zeros(1, columns (Z) + 3, size (Z, 3))];
 
+      ## interpolate
+      if (isrow (XI) && iscolumn (YI))
+        ZI = conv_interp_vec (ZI, Y, YI, @cubic, [-2, 2], 1);
+        ZI = conv_interp_vec (ZI, X, XI, @cubic, [-2, 2], 2);
+      else
+        ZI = conv_interp_pairs (ZI, X, Y, XI, YI, @cubic, [-2, 2]);
+      endif
+    endif
   endif
 
   ## extrapolation 'extrap'
@@ -367,6 +396,70 @@
   b = ! any (d1(:) != 0);
 endfunction
 
+## cubic convolution kernel with a = -0.5 for MATLAB compatibility.
+function w = cubic (h)
+
+  absh = abs (h);
+  absh01 = absh <= 1;
+  absh12 = absh <= 2 & ! absh01;
+  absh_sqr = absh .* absh;
+  absh_cube = absh_sqr .* absh;
+  w = ...  # for |h| <= 1
+      (1.5 * absh_cube - 2.5 * absh_sqr + 1) .* absh01 ...
+      ...  # for 1 < |h| <= 2
+      + (-0.5 * absh_cube + 2.5 * absh_sqr - 4 * absh + 2) .* absh12;
+
+endfunction
+
+## bicubic interpolation of full matrix in one direction with vector
+function out = conv_interp_vec (Z, XY, XIYI, kernel, kernel_bounds, axis)
+
+  ## allocate output
+  out_shape = size (Z);
+  out_shape(axis) = length (XIYI);
+  out = zeros (out_shape);
+
+  ## get indexes and distances h
+  spread = abs (XY(1) - XY(2));
+  idx = lookup (XY, XIYI, "l");
+  h = (XIYI - XY(idx)) / spread;
+  idx += -kernel_bounds(1) - 1;  # apply padding for indexes
+
+  ## interpolate
+  for shift = kernel_bounds(1)+1 : kernel_bounds(2)
+    if (axis == 1)
+      out += Z(idx + shift, :) .* kernel (shift - h);
+    else
+      out += Z(:, idx + shift) .* kernel (shift - h);
+    endif
+  endfor
+
+endfunction
+
+## bicubic interpolation of arbitrary XI-YI-pairs
+function out = conv_interp_pairs (Z, X, Y, XI, YI, kernel, kernel_bounds)
+
+  spread_x = abs (X(1, 1) - X(1, 2));
+  spread_y = abs (Y(1, 1) - Y(2, 1));
+  idx_x = lookup (X, XI, "l");
+  idx_y = lookup (Y, YI, "l");
+  h_x = (XI - reshape (X(idx_x), size (idx_x))) / spread_x;
+  h_y = (YI - reshape (Y(idx_y), size (idx_y))) / spread_y;
+
+  # adjust indexes for padding
+  idx_x += -kernel_bounds(1) - 1;
+  idx_y += -kernel_bounds(1) - 1;
+
+  shifts = kernel_bounds(1)+1 : kernel_bounds(2);
+  [SX(1,1,:,:), SY(1,1,:,:)] = meshgrid (shifts, shifts);
+  pixels = Z(sub2ind (size (Z), idx_y + SY, idx_x + SX));
+  kernel_y = kernel (reshape (shifts, 1, 1, [], 1) - h_y);
+  kernel_x = kernel (reshape (shifts, 1, 1, 1, []) - h_x);
+  out_x = sum (pixels .* kernel_x, 4);
+  out = sum (out_x .* kernel_y, 3);
+
+endfunction
+
 
 %!demo
 %! clf;
@@ -374,7 +467,7 @@
 %! A = [13,-1,12;5,4,3;1,6,2];
 %! x = [0,1,4];  y = [10,11,12];
 %! xi = linspace (min (x), max (x), 17);
-%! yi = linspace (min (y), max (y), 26)';
+%! yi = linspace (min (y), max (y), 26).';
 %! mesh (xi,yi,interp2 (x,y,A,xi,yi, "linear"));
 %! [x,y] = meshgrid (x,y);
 %! hold on; plot3 (x,y,A,"b*"); hold off;
@@ -383,9 +476,9 @@
 %! clf;
 %! colormap ("default");
 %! [x,y,A] = peaks (10);
-%! x = x(1,:)';  y = y(:,1);
+%! x = x(1,:).';  y = y(:,1);
 %! xi = linspace (min (x), max (x), 41);
-%! yi = linspace (min (y), max (y), 41)';
+%! yi = linspace (min (y), max (y), 41).';
 %! mesh (xi,yi,interp2 (x,y,A,xi,yi, "linear"));
 %! [x,y] = meshgrid (x,y);
 %! hold on; plot3 (x,y,A,"b*"); hold off;
@@ -396,7 +489,7 @@
 %! A = [13,-1,12;5,4,3;1,6,2];
 %! x = [0,1,4];  y = [10,11,12];
 %! xi = linspace (min (x), max (x), 17);
-%! yi = linspace (min (y), max (y), 26)';
+%! yi = linspace (min (y), max (y), 26).';
 %! mesh (xi,yi,interp2 (x,y,A,xi,yi, "nearest"));
 %! [x,y] = meshgrid (x,y);
 %! hold on; plot3 (x,y,A,"b*"); hold off;
@@ -405,33 +498,31 @@
 %! clf;
 %! colormap ("default");
 %! [x,y,A] = peaks (10);
-%! x = x(1,:)';  y = y(:,1);
+%! x = x(1,:).';  y = y(:,1);
 %! xi = linspace (min (x), max (x), 41);
-%! yi = linspace (min (y), max (y), 41)';
+%! yi = linspace (min (y), max (y), 41).';
 %! mesh (xi,yi,interp2 (x,y,A,xi,yi, "nearest"));
 %! [x,y] = meshgrid (x,y);
 %! hold on; plot3 (x,y,A,"b*"); hold off;
 
-## 'pchip' commented out since it is the same as 'cubic'
-%!#demo
+%!demo
 %! clf;
 %! colormap ("default");
 %! A = [13,-1,12;5,4,3;1,6,2];
 %! x = [0,1,2];  y = [10,11,12];
 %! xi = linspace (min (x), max (x), 17);
-%! yi = linspace (min (y), max (y), 26)';
+%! yi = linspace (min (y), max (y), 26).';
 %! mesh (xi,yi,interp2 (x,y,A,xi,yi, "pchip"));
 %! [x,y] = meshgrid (x,y);
 %! hold on; plot3 (x,y,A,"b*"); hold off;
 
-## 'pchip' commented out since it is the same as 'cubic'
-%!#demo
+%!demo
 %! clf;
 %! colormap ("default");
 %! [x,y,A] = peaks (10);
-%! x = x(1,:)';  y = y(:,1);
+%! x = x(1,:).';  y = y(:,1);
 %! xi = linspace (min (x), max (x), 41);
-%! yi = linspace (min (y), max (y), 41)';
+%! yi = linspace (min (y), max (y), 41).';
 %! mesh (xi,yi,interp2 (x,y,A,xi,yi, "pchip"));
 %! [x,y] = meshgrid (x,y);
 %! hold on; plot3 (x,y,A,"b*"); hold off;
@@ -442,7 +533,7 @@
 %! A = [13,-1,12;5,4,3;1,6,2];
 %! x = [0,1,2];  y = [10,11,12];
 %! xi = linspace (min (x), max (x), 17);
-%! yi = linspace (min (y), max (y), 26)';
+%! yi = linspace (min (y), max (y), 26).';
 %! mesh (xi,yi,interp2 (x,y,A,xi,yi, "cubic"));
 %! [x,y] = meshgrid (x,y);
 %! hold on; plot3 (x,y,A,"b*"); hold off;
@@ -451,9 +542,9 @@
 %! clf;
 %! colormap ("default");
 %! [x,y,A] = peaks (10);
-%! x = x(1,:)';  y = y(:,1);
+%! x = x(1,:).';  y = y(:,1);
 %! xi = linspace (min (x), max (x), 41);
-%! yi = linspace (min (y), max (y), 41)';
+%! yi = linspace (min (y), max (y), 41).';
 %! mesh (xi,yi,interp2 (x,y,A,xi,yi, "cubic"));
 %! [x,y] = meshgrid (x,y);
 %! hold on; plot3 (x,y,A,"b*"); hold off;
@@ -464,7 +555,7 @@
 %! A = [13,-1,12;5,4,3;1,6,2];
 %! x = [0,1,2];  y = [10,11,12];
 %! xi = linspace (min (x), max (x), 17);
-%! yi = linspace (min (y), max (y), 26)';
+%! yi = linspace (min (y), max (y), 26).';
 %! mesh (xi,yi,interp2 (x,y,A,xi,yi, "spline"));
 %! [x,y] = meshgrid (x,y);
 %! hold on; plot3 (x,y,A,"b*"); hold off;
@@ -473,36 +564,115 @@
 %! clf;
 %! colormap ("default");
 %! [x,y,A] = peaks (10);
-%! x = x(1,:)';  y = y(:,1);
+%! x = x(1,:).';  y = y(:,1);
 %! xi = linspace (min (x), max (x), 41);
-%! yi = linspace (min (y), max (y), 41)';
+%! yi = linspace (min (y), max (y), 41).';
 %! mesh (xi,yi,interp2 (x,y,A,xi,yi, "spline"));
 %! [x,y] = meshgrid (x,y);
 %! hold on; plot3 (x,y,A,"b*"); hold off;
 
+%!shared x, y, orig, xi, yi, expected
 %!test  # simple test
 %! x = [1,2,3];
 %! y = [4,5,6,7];
 %! [X, Y] = meshgrid (x, y);
 %! orig = X.^2 + Y.^3;
-%! xi = [1.2,2, 1.5];
-%! yi = [6.2, 4.0, 5.0]';
+%! xi = [0.8, 1.2, 2.0, 1.5];
+%! yi = [6.2, 4.0, 5.0, 7.1].';
+%!
+%! # check nearest neighbor
+%! expected = ...
+%!   [NA, 217, 220, 220;
+%!    NA,  65,  68,  68;
+%!    NA, 126, 129, 129;
+%!    NA,  NA,  NA,  NA];
+%! result = interp2 (x, y, orig, xi, yi, "nearest");
+%! assert (result, expected);
 %!
+%! # check invariance of translation
+%! result = interp2 (x+3, y-7, orig, xi+3, yi-7, "nearest");
+%! assert (result, expected);
+%!
+%! # check invariance of scaling
+%! result = interp2 (x*3, y*(-7), orig, xi*3, yi*(-7), "nearest");
+%! assert (result, expected);
+%!
+%! # check interpolation with index pairs
+%! result = interp2 (x, y, orig, xi(2:4), yi(1:3).', "nearest");
+%! assert (result, expected(sub2ind(size(expected), 1:3, 2:4)));
+%!
+%! # check bilinear interpolation
 %! expected = ...
-%!   [243,   245.4,  243.9;
-%!     65.6,  68,     66.5;
-%!    126.6, 129,    127.5];
-%! result = interp2 (x,y,orig, xi, yi);
+%!   [NA, 243,     245.4,   243.9;
+%!    NA,  65.6,    68,      66.5;
+%!    NA, 126.6,   129,     127.5;
+%!    NA,  NA,      NA,      NA];
+%! result = interp2 (x, y, orig, xi, yi);
+%! assert (result, expected, 1000*eps);
+%!
+%! # check invariance of translation
+%! result = interp2 (x+3, y-7, orig, xi+3, yi-7);
+%! assert (result, expected, 1000*eps);
+%!
+%! # check invariance of scaling
+%! result = interp2 (x*3, y*(-7), orig, xi*3, yi*(-7));
+%! assert (result, expected, 1000*eps);
+%!
+%! # check interpolation with index pairs
+%! result = interp2 (x, y, orig, xi(2:4), yi(1:3).');
+%! assert (result, expected(sub2ind(size(expected), 1:3, 2:4)), 1000*eps);
+%!
+%! # check spline interpolation
+%! expected = ...
+%!   [238.968,  239.768,  242.328,  240.578;
+%!     64.64,    65.44,    68,       66.25;
+%!    125.64,   126.44,   129,      127.25;
+%!    358.551,  359.351,  361.911,  360.161];
+%! result = interp2 (x, y, orig, xi, yi, "spline");
+%! assert (result, expected, 1000*eps);
 %!
+%! # check invariance of translation
+%! result = interp2 (x+3, y-7, orig, xi+3, yi-7, "spline");
 %! assert (result, expected, 1000*eps);
+%!
+%! # check invariance of scaling
+%! result = interp2 (x*3, y*(-7), orig, xi*3, yi*(-7), "spline");
+%! assert (result, expected, 1000*eps);
+%!
+%!test <62133>
+%! # FIXME: spline interpolation does not support index pairs, Matlab does.
+%! result = interp2 (x, y, orig, xi(2:4), yi(1:3).', "spline");
+%! assert (result, expected(sub2ind(size(expected), 1:3, 2:4)), 1000*eps);
+%!
+%!test <*61754>
+%! # check bicubic interpolation
+%! expected = ...
+%!   [NA, 239.96,  242.52,  240.77;
+%!    NA,  65.44,   68,      66.25;
+%!    NA, 126.44,  129,     127.25;
+%!    NA,  NA,      NA,      NA];
+%! result = interp2 (x, y, orig, xi, yi, "cubic");
+%! assert (result, expected, 10000*eps);
+%!
+%! # check invariance of translation
+%! result = interp2 (x+3, y-7, orig, xi+3, yi-7, "cubic");
+%! assert (result, expected, 10000*eps);
+%!
+%! # check invariance of scaling
+%! result = interp2 (x*3, y*(-7), orig, xi*3, yi*(-7), "cubic");
+%! assert (result, expected, 10000*eps);
+%!
+%! # check interpolation with index pairs
+%! result = interp2 (x, y, orig, xi(2:4), yi(1:3).', "cubic");
+%! assert (result, expected(sub2ind(size(expected), 1:3, 2:4)), 10000*eps);
 
 ## Test that interpolating a complex matrix is equivalent to interpolating its
 ## real and imaginary parts separately.
-%!test <61863>
+%!test <*61863>
 %! xi = [2.5, 3.5];
-%! yi = [0.5, 1.5]';
-%! orig = rand (2, 3) + 1i * rand (2, 3);
-%! for method = {"nearest", "linear", "pchip", "spline"}
+%! yi = [0.5, 1.5].';
+%! orig = rand (4, 3) + 1i * rand (4, 3);
+%! for method = {"nearest", "linear", "pchip", "cubic", "spline"}
 %!   interp_complex = interp2 (orig, xi, yi, method{1});
 %!   interp_real = interp2 (real (orig), xi, yi, method{1});
 %!   interp_imag = interp2 (imag (orig), xi, yi, method{1});
@@ -515,7 +685,7 @@
 %! y = [4,5,6,7];
 %! [X, Y] = meshgrid (x, y);
 %! orig = X.^2 + Y.^3;
-%! xi = [1:0.25:3];  yi = [4:0.25:7]';
+%! xi = [1:0.25:3];  yi = [4:0.25:7].';
 %! expected = interp2 (x,y,orig, xi, yi);
 %! result = interp2 (orig, 2);
 %!
@@ -535,18 +705,20 @@
 %! [X, Y] = meshgrid (x,y);
 %! orig = X.^2 + Y.^3;
 %! xi = [0,4];
-%! yi = [3,8]';
+%! yi = [3,8].';
 %! assert (interp2 (x,y,orig, xi, yi), [NA,NA;NA,NA]);
 %! assert (interp2 (x,y,orig, xi, yi,"linear", 0), [0,0;0,0]);
 %! assert (interp2 (x,y,orig, xi, yi,"linear", 2), [2,2;2,2]);
 %! assert (interp2 (x,y,orig, xi, yi,"spline", 2), [2,2;2,2]);
 %! assert (interp2 (x,y,orig, xi, yi,"linear", 0+1i), [0+1i,0+1i;0+1i,0+1i]);
 %! assert (interp2 (x,y,orig, xi, yi,"spline"), [27,43;512,528]);
+%! assert (interp2 (x,y,orig, xi, yi,"cubic"), [NA,NA;NA,NA]);
+%! assert (interp2 (x,y,orig, xi, yi,"cubic", 2), [2,2;2,2]);
 
 %!test  # for values at boundaries
 %! A = [1,2;3,4];
 %! x = [0,1];
-%! y = [2,3]';
+%! y = [2,3].';
 %! assert (interp2 (x,y,A,x,y,"linear"), A);
 %! assert (interp2 (x,y,A,x,y,"nearest"), A);
 
@@ -569,20 +741,26 @@
 %!assert (interp2 (z), zout, tol)
 %!assert (interp2 (z, "linear"), zout, tol)
 %!assert (interp2 (z, "pchip"), zout, tol)
-%!assert (interp2 (z, "cubic"), zout, 10 * tol)
+%!assert (interp2 (z, "cubic"), zout, tol)
 %!assert (interp2 (z, "spline"), zout, tol)
-%!assert (interp2 (z, [2 3 1], [2 2 2]', "linear"),
+%!assert (interp2 (z, [2 3 1], [2 2 2].', "linear"),
 %!        repmat ([5, 7, 3], [3, 1]), tol)
-%!assert (interp2 (z, [2 3 1], [2 2 2]', "pchip"),
+%!assert (interp2 (z, [2 3 1], [2 2 2].', "pchip"),
 %!        repmat ([5, 7, 3], [3, 1]), tol)
-%!assert (interp2 (z, [2 3 1], [2 2 2]', "cubic"),
-%!        repmat ([5, 7, 3], [3, 1]), 10 * tol)
-%!assert (interp2 (z, [2 3 1], [2 2 2]', "spline"),
+%!assert (interp2 (z, [2 3 1], [2 2 2].', "cubic"),
+%!        repmat ([5, 7, 3], [3, 1]), tol)
+%!assert (interp2 (z, [2 3 1], [2 2 2].', "spline"),
 %!        repmat ([5, 7, 3], [3, 1]), tol)
 %!assert (interp2 (z, [2 3 1], [2 2 2], "linear"), [5 7 3], tol)
 %!assert (interp2 (z, [2 3 1], [2 2 2], "pchip"), [5 7 3], tol)
-%!assert (interp2 (z, [2 3 1], [2 2 2], "cubic"), [5 7 3], 10 * tol)
+%!assert (interp2 (z, [2 3 1], [2 2 2], "cubic"), [5 7 3], tol)
 %!assert (interp2 (z, [2 3 1], [2 2 2], "spline"), [5 7 3], tol)
+%!assert (interp2 (z, [3; 3; 3], [2; 3; 1], "linear"), [7; 9; 5], tol)
+%!assert (interp2 (z, [3; 3; 3], [2; 3; 1], "pchip"), [7; 9; 5], tol)
+%!assert (interp2 (z, [3; 3; 3], [2; 3; 1], "cubic"), [7; 9; 5], tol)
+%!test <62132>
+%! # FIXME: single column yields single row with spline interpolation (numbers are correct)
+%! assert (interp2 (z, [3; 3; 3], [2; 3; 1], "spline"), [7; 9; 5], tol)
 
 ## Test input validation
 %!error interp2 (1, 1, 1, 1, 1, 2)    # only 5 numeric inputs
@@ -594,10 +772,10 @@
 %!error <N must be an integer .= 0> interp2 (ones (2), -1)
 %!error <N must be an integer .= 0> interp2 (ones (2), 1.5)
 %!warning <ignoring unsupported '\*' flag> interp2 (rand (3,3), 1, "*linear");
-%!error <EXTRAP must be a numeric scalar> interp2 (1, 1, 1, 1, 1, 'linear', {1})
-%!error <EXTRAP must be a numeric scalar> interp2 (1, 1, 1, 1, 1, 'linear', ones (2,2))
-%!error <EXTRAP must be a numeric scalar> interp2 (1, 1, 1, 1, 1, 'linear', "abc")
-%!error <EXTRAP must be a numeric scalar> interp2 (1, 1, 1, 1, 1, 'linear', "extrap")
+%!error <EXTRAP must be a numeric scalar> interp2 (1, 1, 1, 1, 1, "linear", {1})
+%!error <EXTRAP must be a numeric scalar> interp2 (1, 1, 1, 1, 1, "linear", ones (2,2))
+%!error <EXTRAP must be a numeric scalar> interp2 (1, 1, 1, 1, 1, "linear", "abc")
+%!error <EXTRAP must be a numeric scalar> interp2 (1, 1, 1, 1, 1, "linear", "extrap")
 %!error <X, Y must be numeric matrices> interp2 ({1}, 1, ones (2), 1, 1)
 %!error <X, Y must be numeric matrices> interp2 (1, {1}, ones (2), 1, 1)
 %!error <XI, YI must be numeric> interp2 (1, 1, ones (2), {1}, 1)
@@ -608,6 +786,7 @@
 %!error <X and Y size must match the dimensions of Z> interp2 (1:2, 1:2, ones (3,2), 1, 1)
 %!error <X must be strictly monotonic> interp2 ([1 0 2], 1:3, ones (3,3), 1, 1)
 %!error <Y must be strictly monotonic> interp2 (1:3, [1 0 2], ones (3,3), 1, 1)
+%!warning <cubic requires at least 3 points in each dimension.> interp2 (eye(2), 1.5, 1.5, "cubic");
 %!error <XI and YI must be matrices of equal size> interp2 (1:2, 1:2, ones (2), ones (2,2), 1)
 %!error <XI and YI must be matrices of equal size> interp2 (1:2, 1:2, ones (2), 1, ones (2,2))
 %!error <XI, YI must have uniform spacing> interp2 (1:2, 1:2, ones (2), [1 2 4], [1 2 3], "spline")
--- a/scripts/general/interpft.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/general/interpft.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} interpft (@var{x}, @var{n})
-## @deftypefnx {} {} interpft (@var{x}, @var{n}, @var{dim})
+## @deftypefn  {} {@var{y} =} interpft (@var{x}, @var{n})
+## @deftypefnx {} {@var{y} =} interpft (@var{x}, @var{n}, @var{dim})
 ##
 ## Fourier interpolation.
 ##
@@ -41,7 +41,7 @@
 ## @seealso{interp1}
 ## @end deftypefn
 
-function z = interpft (x, n, dim)
+function y = interpft (x, n, dim)
 
   if (nargin < 2)
     print_usage ();
@@ -70,36 +70,36 @@
   m = rows (x);
 
   inc = ceil (m/n);
-  y = fft (x) / m;
+  xfft = fft (x) / m;
   k = ceil (m / 2);
   sz = size (x);
   sz(1) = n * inc - m;
 
   idx = repmat ({':'}, nd, 1);
   idx{1} = 1:k;
-  z = cat (1, y(idx{:}), zeros (sz));
+  y = cat (1, xfft(idx{:}), zeros (sz));
   idx{1} = k+1:m;
-  z = cat (1, z, y(idx{:}));
+  y = cat (1, y, xfft(idx{:}));
 
   ## When m is an even number of rows, the FFT has a single Nyquist bin.
   ## If zero-padded above, distribute the value of the Nyquist bin evenly
   ## between the new corresponding positive and negative frequency bins.
   if (sz(1) > 0 && k == m/2)
     idx{1} = n * inc - k + 1;
-    tmp = z(idx{:}) / 2;
-    z(idx{:}) = tmp;
+    tmp = y(idx{:}) / 2;
+    y(idx{:}) = tmp;
     idx{1} = k + 1;
-    z(idx{:}) = tmp;
+    y(idx{:}) = tmp;
   endif
 
-  z = n * ifft (z);
+  y = n * ifft (y);
 
   if (inc != 1)
     sz(1) = n;
-    z = inc * reshape (z(1:inc:end), sz);
+    y = inc * reshape (y(1:inc:end), sz);
   endif
 
-  z = ipermute (z, perm);
+  y = ipermute (y, perm);
 
 endfunction
 
--- a/scripts/general/interpn.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/general/interpn.m	Mon Aug 29 13:58:00 2022 +0200
@@ -185,11 +185,6 @@
 
   if (strcmp (method, "linear"))
     vi = __lin_interpn__ (x{:}, v, y{:});
-    if (iscomplex (v))
-      ## __lin_interpn__ ignores imaginary part. Do it again for imag part.
-      ## FIXME: Adapt __lin_interpn__ to correctly handle complex input.
-      vi += 1i * __lin_interpn__ (x{:}, imag (v), y{:});
-    endif
     vi(isna (vi)) = extrapval;
   elseif (strcmp (method, "nearest"))
     ## FIXME: This seems overly complicated.  Is there a way to simplify
--- a/scripts/general/isequal.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/general/isequal.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} isequal (@var{x1}, @var{x2}, @dots{})
+## @deftypefn {} {@var{tf} =} isequal (@var{x1}, @var{x2}, @dots{})
 ## Return true if all of @var{x1}, @var{x2}, @dots{} are equal.
 ## @seealso{isequaln}
 ## @end deftypefn
@@ -46,7 +46,7 @@
 ##    e. cell       compare each member with isequal (recursive)
 ##    f. fcn_handle compare using overloaded "eq" operator
 
-function t = isequal (x, varargin)
+function tf = isequal (x, varargin)
 
   if (nargin < 2)
     print_usage ();
@@ -65,22 +65,22 @@
   ## All arguments must either be of the same class,
   ##  or they must be "numeric" values.
   if (two_args)
-    t = (strcmp (class (x), class (y))
-         || ((isreal (x) || iscomplex (x)) && (isreal (y) || iscomplex (y))));
+    tf = (strcmp (class (x), class (y))
+          || ((isreal (x) || iscomplex (x)) && (isreal (y) || iscomplex (y))));
   else
-    t = (all (cellfun ("isclass", varargin, class (x)))
-         || ((isreal (x) || iscomplex (x))
-             && all (cellfun ("isreal", varargin)
-                     | cellfun ("isnumeric", varargin))));
+    tf = (all (cellfun ("isclass", varargin, class (x)))
+          || ((isreal (x) || iscomplex (x))
+              && all (cellfun ("isreal", varargin)
+                      | cellfun ("isnumeric", varargin))));
   endif
 
   ## Test that everything is the same size (which also tests dimensions)
-  if (t)
-    t = size_equal (x, varargin{:});
+  if (tf)
+    tf = size_equal (x, varargin{:});
   endif
 
   ## From here on, compare any objects as if they were structures.
-  if (t && isobject (x))
+  if (tf && isobject (x))
     ## Locally suppress class-to-struct warning.  We know what we are doing.
     warning ("off", "Octave:classdef-to-struct", "local");
     x = builtin ("struct", x);
@@ -98,44 +98,44 @@
   ############################################################
   ## Check individual classes.
 
-  if (t)
+  if (tf)
     if (two_args)
 
       if (ischar (x) && ischar (y))
         ## char type.  Optimization, strcmp is ~35% faster than '==' operator.
-        t = strcmp (x, y);
+        tf = strcmp (x, y);
 
       elseif (isreal (x) || iscomplex (x))
         if (issparse (x))
           ## sparse types.
           [xi, xj, xv] = find (x);
           [yi, yj, yv] = find (y);
-          t = (length (xi) == length (yi)) && all (xi == yi) ...
+          tf = (length (xi) == length (yi)) && all (xi == yi) ...
               && all (xj == yj) && all (xv == yv);
         else
           ## general "numeric" type.  Use '==' operator.
           m = (x == y);
-          t = all (m(:));
+          tf = all (m(:));
         endif
 
       elseif (isstruct (x))
         ## struct type.  Compare # of fields, fieldnames, then field values.
 
         ## Test number of fields are equal.
-        t = (numfields (x) == numfields (y));
+        tf = (numfields (x) == numfields (y));
 
         ## Test that all the field names are equal.
-        if (t)
+        if (tf)
           s_fnm_x = sort (fieldnames (x));
-          t = all (strcmp (s_fnm_x, sort (fieldnames (y))));
+          tf = all (strcmp (s_fnm_x, sort (fieldnames (y))));
         endif
 
         ## Test that all field values are equal.  Slow because of recursion.
-        if (t)
+        if (tf)
           if (isscalar (x))
             for fldnm = s_fnm_x.'
-              t = isequal (x.(fldnm{1}), y.(fldnm{1}));
-              if (! t)
+              tf = isequal (x.(fldnm{1}), y.(fldnm{1}));
+              if (! tf)
                 break;
               endif
             endfor
@@ -143,8 +143,8 @@
             ## struct arrays have to have the contents of each field wrapped
             ## in a cell since it expands to a collection of values.
             for fldnm = s_fnm_x.'
-              t = isequal ({x.(fldnm{1})}, {y.(fldnm{1})});
-              if (! t)
+              tf = isequal ({x.(fldnm{1})}, {y.(fldnm{1})});
+              if (! tf)
                 break;
               endif
             endfor
@@ -156,20 +156,27 @@
         ## FIXME: It would be faster to use strcmp on whole cellstr arrays,
         ## but bug #51412 needs to be fixed.  Instead, time/space trade-off.
         ## Convert to char (space) for faster processing with strcmp (time).
-        t = strcmp (char (x), char (y));
+        tf = strcmp (char (x), char (y));
 
       elseif (iscell (x))
         ## cell type.  Check that each element of a cell is equal.  Slow.
         n = numel (x);
         idx = 1;
-        while (t && idx <= n)
-          t = isequal (x{idx}, y{idx});
+        while (tf && idx <= n)
+          tf = isequal (x{idx}, y{idx});
           idx += 1;
         endwhile
 
       elseif (is_function_handle (x))
         ## function type.  Use '==' operator which is overloaded.
-        t = (x == y);
+        tf = (x == y);
+
+      elseif (isjava (x))
+        try
+          tf = x.equals (y);
+        catch
+          error ('isequal: Java object does not implement "equals" function');
+        end_try_catch
 
       else
         error ("isequal: Impossible to reach code.  File a bug report.");
@@ -181,8 +188,8 @@
       if (ischar (x) && all (cellfun ("isclass", varargin, "char")))
         ## char type.  Optimization, strcmp is ~35% faster than '==' operator.
         idx = 1;
-        while (t && idx <= nvarargin)
-          t = strcmp (x, varargin{idx});
+        while (tf && idx <= nvarargin)
+          tf = strcmp (x, varargin{idx});
           idx += 1;
         endwhile
 
@@ -193,11 +200,11 @@
 
           idx = 1;
           [xi, xj, xv] = find (x);
-          while (t && idx <= nvarargin)
+          while (tf && idx <= nvarargin)
             y = varargin{idx};
             [yi, yj, yv] = find (y);
-            t = (length (xi) == length (yi)) && all (xi == yi) ...
-                && all (xj == yj) && all (xv == yv);
+            tf = (length (xi) == length (yi)) && all (xi == yi) ...
+                 && all (xj == yj) && all (xv == yv);
 
             idx += 1;
           endwhile
@@ -206,10 +213,10 @@
           ## general "numeric" type.  Use '==' operator.
 
           idx = 1;
-          while (t && idx <= nvarargin)
+          while (tf && idx <= nvarargin)
             y = varargin{idx};
             m = (x == y);
-            t = all (m(:));
+            tf = all (m(:));
 
             idx += 1;
           endwhile
@@ -223,21 +230,21 @@
         fnm_x = fieldnames (x);
         n = numel (fnm_x);
         fnm_v = cellfun ("fieldnames", varargin, "uniformoutput", false);
-        t = all (n == cellfun ("numel", fnm_v));
+        tf = all (n == cellfun ("numel", fnm_v));
 
         ## Test that all the field names are equal.
-        if (t)
+        if (tf)
           fnm_x = sort (fnm_x);
           idx = 1;
-          while (t && idx <= nvarargin)
+          while (tf && idx <= nvarargin)
             ## Allow the fieldnames to be in a different order.
-            t = all (strcmp (fnm_x, sort (fnm_v{idx})));
+            tf = all (strcmp (fnm_x, sort (fnm_v{idx})));
             idx += 1;
           endwhile
         endif
 
         ## Test that all field values are equal.  Slow because of recursion.
-        if (t)
+        if (tf)
           args = cell (1, 1 + nvarargin);
           if (isscalar (x))
             for fldnm = fnm_x.'
@@ -246,9 +253,9 @@
                 args{argn+1} = varargin{argn}.(fldnm{1});
               endfor
 
-              t = isequal (args{:});
+              tf = isequal (args{:});
 
-              if (! t)
+              if (! tf)
                 break;
               endif
             endfor
@@ -261,9 +268,9 @@
                 args{argn+1} = { varargin{argn}.(fldnm{1}) };
               endfor
 
-              t = isequal (args{:});
+              tf = isequal (args{:});
 
-              if (! t)
+              if (! tf)
                 break;
               endif
             endfor
@@ -277,8 +284,8 @@
         ## Convert to char (space) for faster processing with strcmp (time).
         idx = 1;
         x = char (x);
-        while (t && idx <= nvarargin)
-          t = strcmp (x, char (varargin{idx}));
+        while (tf && idx <= nvarargin)
+          tf = strcmp (x, char (varargin{idx}));
           idx += 1;
         endwhile
 
@@ -287,18 +294,18 @@
         n = numel (x);
         args = cell (1, 1 + nvarargin);
         idx = 1;
-        while (t && idx <= n)
+        while (tf && idx <= n)
           args(1) = x{idx};
           args(2:end) = [cellindexmat(varargin, idx){:}];
 
-          t = isequal (args{:});
+          tf = isequal (args{:});
 
           idx += 1;
         endwhile
 
       elseif (is_function_handle (x))
         ## function type.  Use '==' operator which is overloaded.
-        t = all (cellfun ("eq", {x}, varargin));
+        tf = all (cellfun ("eq", {x}, varargin));
 
       else
         error ("isequal: Impossible to reach code.  File a bug report.");
@@ -308,7 +315,7 @@
     endif
   endif
 
-  t = full (t);  # Always return full logical value for Matlab compatibility.
+  tf = full (tf);  # Always return full logical value for Matlab compatibility.
 
 endfunction
 
@@ -544,6 +551,14 @@
 %!assert (isequal (sparse (1), sparse (1)), true)
 %!assert (isequal (sparse (1), sparse (1)), sparse (1), true)
 
+## Java objects
+%!testif HAVE_JAVA; usejava ("jvm")  <*62930>
+%! int1 = javaObject ("java.lang.Integer", 1.0);
+%! int2 = javaObject ("java.lang.Integer", 2.0);
+%! assert (isequal (int1, int1));
+%! assert (! isequal (int1, 1.0));
+%! assert (! isequal (int1, int2));
+
 ## test input validation
 %!error <Invalid call> isequal ()
 %!error <Invalid call> isequal (1)
--- a/scripts/general/isequaln.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/general/isequaln.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} isequaln (@var{x1}, @var{x2}, @dots{})
+## @deftypefn {} {@var{tf} =} isequaln (@var{x1}, @var{x2}, @dots{})
 ## Return true if all of @var{x1}, @var{x2}, @dots{} are equal under the
 ## additional assumption that NaN == NaN (no comparison of NaN placeholders
 ## in dataset).
@@ -48,7 +48,7 @@
 ##    e. cell       compare each member with isequaln (recursive)
 ##    f. fcn_handle compare using overloaded "eq" operator
 
-function t = isequaln (x, varargin)
+function tf = isequaln (x, varargin)
 
   if (nargin < 2)
     print_usage ();
@@ -67,22 +67,22 @@
   ## All arguments must either be of the same class,
   ##  or they must be "numeric" values.
   if (two_args)
-    t = (strcmp (class (x), class (y))
-         || ((isreal (x) || iscomplex (x)) && (isreal (y) || iscomplex (y))));
+    tf = (strcmp (class (x), class (y))
+          || ((isreal (x) || iscomplex (x)) && (isreal (y) || iscomplex (y))));
   else
-    t = (all (cellfun ("isclass", varargin, class (x)))
-         || ((isreal (x) || iscomplex (x))
-             && all (cellfun ("isreal", varargin)
-                     | cellfun ("isnumeric", varargin))));
+    tf = (all (cellfun ("isclass", varargin, class (x)))
+          || ((isreal (x) || iscomplex (x))
+              && all (cellfun ("isreal", varargin)
+                      | cellfun ("isnumeric", varargin))));
   endif
 
   ## Test that everything is the same size (which also tests dimensions)
-  if (t)
-    t = size_equal (x, varargin{:});
+  if (tf)
+    tf = size_equal (x, varargin{:});
   endif
 
   ## From here on, compare any objects as if they were structures.
-  if (t && isobject (x))
+  if (tf && isobject (x))
     ## Locally suppress class-to-struct warning.  We know what we are doing.
     warning ("off", "Octave:classdef-to-struct", "local");
     x = builtin ("struct", x);
@@ -100,40 +100,40 @@
   ############################################################
   ## Check individual classes.
 
-  if (t)
+  if (tf)
     if (two_args)
 
       if (ischar (x) && ischar (y))
         ## char type.  Optimization, strcmp is ~35% faster than '==' operator.
-        t = strcmp (x, y);
+        tf = strcmp (x, y);
 
       elseif (isreal (x) || iscomplex (x))
         ## general "numeric" type.  Use '==' operator.
         m = (x == y);
-        t = all (m(:));
+        tf = all (m(:));
 
-        if (! t && isfloat (x) && isfloat (y))
-          t = isnan (x(! m)) && isnan (y(! m));
+        if (! tf && isfloat (x) && isfloat (y))
+          tf = isnan (x(! m)) && isnan (y(! m));
         endif
 
       elseif (isstruct (x))
         ## struct type.  Compare # of fields, fieldnames, then field values.
 
         ## Test number of fields are equal.
-        t = (numfields (x) == numfields (y));
+        tf = (numfields (x) == numfields (y));
 
         ## Test that all the field names are equal.
-        if (t)
+        if (tf)
           s_fnm_x = sort (fieldnames (x));
-          t = all (strcmp (s_fnm_x, sort (fieldnames (y))));
+          tf = all (strcmp (s_fnm_x, sort (fieldnames (y))));
         endif
 
         ## Test that all field values are equal.  Slow because of recursion.
-        if (t)
+        if (tf)
           if (isscalar (x))
             for fldnm = s_fnm_x.'
-              t = isequaln (x.(fldnm{1}), y.(fldnm{1}));
-              if (! t)
+              tf = isequaln (x.(fldnm{1}), y.(fldnm{1}));
+              if (! tf)
                 break;
               endif
             endfor
@@ -141,8 +141,8 @@
             ## struct arrays have to have the contents of each field wrapped
             ## in a cell since it expands to a collection of values.
             for fldnm = s_fnm_x.'
-              t = isequaln ({x.(fldnm{1})}, {y.(fldnm{1})});
-              if (! t)
+              tf = isequaln ({x.(fldnm{1})}, {y.(fldnm{1})});
+              if (! tf)
                 break;
               endif
             endfor
@@ -154,20 +154,20 @@
         ## FIXME: It would be faster to use strcmp on whole cellstr arrays,
         ## but bug #51412 needs to be fixed.  Instead, time/space trade-off.
         ## Convert to char (space) for faster processing with strcmp (time).
-        t = strcmp (char (x), char (y));
+        tf = strcmp (char (x), char (y));
 
       elseif (iscell (x))
         ## cell type.  Check that each element of a cell is equal.  Slow.
         n = numel (x);
         idx = 1;
-        while (t && idx <= n)
-          t = isequaln (x{idx}, y{idx});
+        while (tf && idx <= n)
+          tf = isequaln (x{idx}, y{idx});
           idx += 1;
         endwhile
 
       elseif (is_function_handle (x))
         ## function type.  Use '==' operator which is overloaded.
-        t = (x == y);
+        tf = (x == y);
 
       else
         error ("isequaln: Impossible to reach code.  File a bug report.");
@@ -179,8 +179,8 @@
       if (ischar (x) && all (cellfun ("isclass", varargin, "char")))
         ## char type.  Optimization, strcmp is ~35% faster than '==' operator.
         idx = 1;
-        while (t && idx <= nvarargin)
-          t = strcmp (x, varargin{idx});
+        while (tf && idx <= nvarargin)
+          tf = strcmp (x, varargin{idx});
           idx += 1;
         endwhile
 
@@ -188,13 +188,13 @@
         ## general "numeric" type.  Use '==' operator.
 
         idx = 1;
-        while (t && idx <= nvarargin)
+        while (tf && idx <= nvarargin)
           y = varargin{idx};
           m = (x == y);
-          t = all (m(:));
+          tf = all (m(:));
 
-          if (! t && isfloat (x) && isfloat (y))
-            t = isnan (x(! m)) && isnan (y(! m));
+          if (! tf && isfloat (x) && isfloat (y))
+            tf = isnan (x(! m)) && isnan (y(! m));
           endif
 
           idx += 1;
@@ -207,21 +207,21 @@
         fnm_x = fieldnames (x);
         n = numel (fnm_x);
         fnm_v = cellfun ("fieldnames", varargin, "uniformoutput", false);
-        t = all (n == cellfun ("numel", fnm_v));
+        tf = all (n == cellfun ("numel", fnm_v));
 
         ## Test that all the field names are equal.
-        if (t)
+        if (tf)
           fnm_x = sort (fnm_x);
           idx = 1;
-          while (t && idx <= nvarargin)
+          while (tf && idx <= nvarargin)
             ## Allow the fieldnames to be in a different order.
-            t = all (strcmp (fnm_x, sort (fnm_v{idx})));
+            tf = all (strcmp (fnm_x, sort (fnm_v{idx})));
             idx += 1;
           endwhile
         endif
 
         ## Test that all field values are equal.  Slow because of recursion.
-        if (t)
+        if (tf)
           args = cell (1, 1 + nvarargin);
           if (isscalar (x))
             for fldnm = fnm_x.'
@@ -230,9 +230,9 @@
                 args{argn+1} = varargin{argn}.(fldnm{1});
               endfor
 
-              t = isequaln (args{:});
+              tf = isequaln (args{:});
 
-              if (! t)
+              if (! tf)
                 break;
               endif
             endfor
@@ -245,9 +245,9 @@
                 args{argn+1} = { varargin{argn}.(fldnm{1}) };
               endfor
 
-              t = isequaln (args{:});
+              tf = isequaln (args{:});
 
-              if (! t)
+              if (! tf)
                 break;
               endif
             endfor
@@ -261,8 +261,8 @@
         ## Convert to char (space) for faster processing with strcmp (time).
         idx = 1;
         x = char (x);
-        while (t && idx <= nvarargin)
-          t = strcmp (x, char (varargin{idx}));
+        while (tf && idx <= nvarargin)
+          tf = strcmp (x, char (varargin{idx}));
           idx += 1;
         endwhile
 
@@ -271,18 +271,18 @@
         n = numel (x);
         args = cell (1, 1 + nvarargin);
         idx = 1;
-        while (t && idx <= n)
+        while (tf && idx <= n)
           args(1) = x{idx};
           args(2:end) = [cellindexmat(varargin, idx){:}];
 
-          t = isequaln (args{:});
+          tf = isequaln (args{:});
 
           idx += 1;
         endwhile
 
       elseif (is_function_handle (x))
         ## function type.  Use '==' operator which is overloaded.
-        t = all (cellfun ("eq", {x}, varargin));
+        tf = all (cellfun ("eq", {x}, varargin));
 
       else
         error ("isequaln: Impossible to reach code.  File a bug report.");
@@ -292,7 +292,7 @@
     endif
   endif
 
-  t = full (t);  # Always return full logical value for Matlab compatibility.
+  tf = full (tf);  # Always return full logical value for Matlab compatibility.
 
 endfunction
 
--- a/scripts/general/logspace.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/general/logspace.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,9 +24,9 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} logspace (@var{a}, @var{b})
-## @deftypefnx {} {} logspace (@var{a}, @var{b}, @var{n})
-## @deftypefnx {} {} logspace (@var{a}, pi, @var{n})
+## @deftypefn  {} {@var{y} =} logspace (@var{a}, @var{b})
+## @deftypefnx {} {@var{y} =} logspace (@var{a}, @var{b}, @var{n})
+## @deftypefnx {} {@var{y} =} logspace (@var{a}, pi, @var{n})
 ## Return a row vector with @var{n} elements logarithmically spaced from
 ## @tex
 ## $10^{a}$ to $10^{b}$.
@@ -72,7 +72,7 @@
 ## @seealso{linspace}
 ## @end deftypefn
 
-function retval = logspace (a, b, n = 50)
+function y = logspace (a, b, n = 50)
 
   if (nargin < 2)
     print_usage ();
@@ -88,7 +88,7 @@
     b = log10 (pi);
   endif
 
-  retval = 10 .^ (linspace (a, b, npoints));
+  y = 10 .^ (linspace (a, b, npoints));
 
 endfunction
 
--- a/scripts/general/module.mk	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/general/module.mk	Mon Aug 29 13:58:00 2022 +0200
@@ -47,6 +47,8 @@
   %reldir%/logspace.m \
   %reldir%/nextpow2.m \
   %reldir%/num2str.m \
+  %reldir%/pagectranspose.m \
+  %reldir%/pagetranspose.m \
   %reldir%/pol2cart.m \
   %reldir%/polyarea.m \
   %reldir%/postpad.m \
@@ -64,7 +66,6 @@
   %reldir%/rng.m \
   %reldir%/rot90.m \
   %reldir%/rotdim.m \
-  %reldir%/shift.m \
   %reldir%/shiftdim.m \
   %reldir%/sortrows.m \
   %reldir%/sph2cart.m \
--- a/scripts/general/num2str.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/general/num2str.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,9 +24,9 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} num2str (@var{x})
-## @deftypefnx {} {} num2str (@var{x}, @var{precision})
-## @deftypefnx {} {} num2str (@var{x}, @var{format})
+## @deftypefn  {} {@var{str} =} num2str (@var{x})
+## @deftypefnx {} {@var{str} =} num2str (@var{x}, @var{precision})
+## @deftypefnx {} {@var{str} =} num2str (@var{x}, @var{format})
 ## Convert a number (or array) to a string (or a character array).
 ##
 ## The optional second argument may either give the number of significant
@@ -78,7 +78,7 @@
 ## @seealso{sprintf, int2str, mat2str}
 ## @end deftypefn
 
-function retval = num2str (x, arg)
+function str = num2str (x, arg)
 
   if (nargin < 1)
     print_usage ();
@@ -87,9 +87,9 @@
   endif
 
   if (ischar (x))
-    retval = x;
+    str = x;
   elseif (isempty (x))
-    retval = "";
+    str = "";
   elseif (isreal (x))
     if (nargin == 2)
       if (ischar (arg))
@@ -143,7 +143,7 @@
       fmt = [deblank(repmat (fmt, 1, nc)), "\n"];
     endif
     strtmp = sprintf (fmt, x);
-    retval = strtrim (char (ostrsplit (strtmp, "\n", true)));
+    str = strtrim (char (ostrsplit (strtmp, "\n", true)));
   else   # Complex matrix input
     if (nargin == 2)
       if (ischar (arg))
@@ -195,7 +195,7 @@
     tmp = regexprep (tmp, " +i\n", "i\n");
     tmp = regexprep (tmp, "( +)i", "i$1");
 
-    retval = strtrim (char (ostrsplit (tmp(1:end-1), "\n")));
+    str = strtrim (char (ostrsplit (tmp(1:end-1), "\n")));
   endif
 
 endfunction
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/scripts/general/pagectranspose.m	Mon Aug 29 13:58:00 2022 +0200
@@ -0,0 +1,58 @@
+########################################################################
+##
+## Copyright (C) 2022 The Octave Project Developers
+##
+## See the file COPYRIGHT.md in the top-level directory of this
+## distribution or <https://octave.org/copyright/>.
+##
+## This file is part of Octave.
+##
+## Octave is free software: you can redistribute it and/or modify it
+## under the terms of the GNU General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## Octave is distributed in the hope that it will be useful, but
+## WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with Octave; see the file COPYING.  If not, see
+## <https://www.gnu.org/licenses/>.
+##
+########################################################################
+
+## -*- texinfo -*-
+## @deftypefn {} {@var{y} =} pagectranspose (@var{A})
+## Return the page-wise complex conjugate transpose of the N-dimensional array
+## @var{A}.
+##
+## This is equivalent to @tcode{@var{A}(:,:, @var{k})'} for each page @var{k}.
+##
+## @seealso{pagetranspose, ctranspose, permute}
+## @end deftypefn
+
+function B = pagectranspose (A)
+
+  if (nargin != 1)
+    print_usage ();
+  endif
+
+  B = permute (conj (A), [2, 1, 3:ndims(A)]);
+
+endfunction
+
+
+%!test
+%! A = reshape (1:8, [2, 2, 2]);
+%! B = pagectranspose (A);
+%! assert (B, cat (3, [1,2;3,4], [5,6;7,8]));
+
+%!test
+%! A = reshape ((1:8)*i, [2, 2, 2]);
+%! B = pagectranspose (A);
+%! assert (B, -i * cat (3, [1,2;3,4], [5,6;7,8]));
+
+## Test input validation
+%!error <Invalid call> pagectranspose ()
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/scripts/general/pagetranspose.m	Mon Aug 29 13:58:00 2022 +0200
@@ -0,0 +1,58 @@
+########################################################################
+##
+## Copyright (C) 2022 The Octave Project Developers
+##
+## See the file COPYRIGHT.md in the top-level directory of this
+## distribution or <https://octave.org/copyright/>.
+##
+## This file is part of Octave.
+##
+## Octave is free software: you can redistribute it and/or modify it
+## under the terms of the GNU General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## Octave is distributed in the hope that it will be useful, but
+## WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with Octave; see the file COPYING.  If not, see
+## <https://www.gnu.org/licenses/>.
+##
+########################################################################
+
+## -*- texinfo -*-
+## @deftypefn {} {@var{B} =} pagetranspose (@var{A})
+## Return the page-wise transpose of the N-dimensional array @var{A}.
+##
+## This is equivalent to @tcode{@var{A}(:,:, @var{k}).@:'} for each page
+## @var{k}.
+##
+## @seealso{pagectranspose, transpose, permute}
+## @end deftypefn
+
+function B = pagetranspose (A)
+
+  if (nargin != 1)
+    print_usage ();
+  endif
+
+  B = permute (A, [2, 1, 3:ndims(A)]);
+
+endfunction
+
+
+%!test
+%! A = reshape (1:8, [2, 2, 2]);
+%! B = pagetranspose (A);
+%! assert (B, cat (3, [1,2;3,4], [5,6;7,8]));
+
+%!test
+%! A = reshape ((1:8)*i, [2, 2, 2]);
+%! B = pagetranspose (A);
+%! assert (B, i * cat (3, [1,2;3,4], [5,6;7,8]));
+
+## Test input validation
+%!error <Invalid call> pagetranspose ()
--- a/scripts/general/polyarea.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/general/polyarea.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} polyarea (@var{x}, @var{y})
-## @deftypefnx {} {} polyarea (@var{x}, @var{y}, @var{dim})
+## @deftypefn  {} {@var{a} =} polyarea (@var{x}, @var{y})
+## @deftypefnx {} {@var{a} =} polyarea (@var{x}, @var{y}, @var{dim})
 ##
 ## Determine area of a polygon by triangle method.
 ##
@@ -55,9 +55,9 @@
   endif
 
   if (nargin == 2)
-    a = abs (sum (x .* (shift (y, -1) - shift (y, 1)))) / 2;
+    a = abs (sum (x .* (circshift (y, -1) - circshift (y, 1)))) / 2;
   else
-    a = abs (sum (x .* (shift (y, -1, dim) - shift (y, 1, dim)), dim)) / 2;
+    a = abs (sum (x .* (circshift (y, -1, dim) - circshift (y, 1, dim)), dim)) / 2;
   endif
 
 endfunction
--- a/scripts/general/postpad.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/general/postpad.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,25 +24,25 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} postpad (@var{x}, @var{l})
-## @deftypefnx {} {} postpad (@var{x}, @var{l}, @var{c})
-## @deftypefnx {} {} postpad (@var{x}, @var{l}, @var{c}, @var{dim})
-## Append the scalar value @var{c} to the vector @var{x} until it is of length
+## @deftypefn  {} {@var{B} =} postpad (@var{A}, @var{l})
+## @deftypefnx {} {@var{B} =} postpad (@var{A}, @var{l}, @var{c})
+## @deftypefnx {} {@var{B} =} postpad (@var{A}, @var{l}, @var{c}, @var{dim})
+## Append the scalar value @var{c} to the vector @var{A} until it is of length
 ## @var{l}.  If @var{c} is not given, a value of 0 is used.
 ##
-## If @code{length (@var{x}) > @var{l}}, elements from the end of @var{x} are
+## If @code{length (@var{A}) > @var{l}}, elements from the end of @var{A} are
 ## removed until a vector of length @var{l} is obtained.
 ##
-## If @var{x} is a matrix, elements are appended or removed from each row.
+## If @var{A} is a matrix, elements are appended or removed from each row.
 ##
 ## If the optional argument @var{dim} is given, operate along this dimension.
 ##
-## If @var{dim} is larger than the dimensions of @var{x}, the result will have
+## If @var{dim} is larger than the dimensions of @var{A}, the result will have
 ## @var{dim} dimensions.
 ## @seealso{prepad, cat, resize}
 ## @end deftypefn
 
-function y = postpad (x, l, c, dim)
+function B = postpad (A, l, c, dim)
 
   if (nargin < 2)
     print_usage ();
@@ -56,8 +56,8 @@
     endif
   endif
 
-  nd = ndims (x);
-  sz = size (x);
+  nd = ndims (A);
+  sz = size (A);
   if (nargin < 4)
     ## Find the first non-singleton dimension.
     (dim = find (sz > 1, 1)) || (dim = 1);
@@ -84,14 +84,14 @@
     ##    ml = max (numel (v1), numel (v2));
     ##    v1 = postpad (v1, ml);
     ##    v2 = postpad (v2, ml);
-    y = x;
+    B = A;
   elseif (d >= l)
     idx = repmat ({':'}, nd, 1);
     idx{dim} = 1:l;
-    y = x(idx{:});
+    B = A(idx{:});
   else
     sz(dim) = l - d;
-    y = cat (dim, x, c(ones (sz)));
+    B = cat (dim, A, c(ones (sz)));
   endif
 
 endfunction
--- a/scripts/general/prepad.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/general/prepad.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,25 +24,25 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} prepad (@var{x}, @var{l})
-## @deftypefnx {} {} prepad (@var{x}, @var{l}, @var{c})
-## @deftypefnx {} {} prepad (@var{x}, @var{l}, @var{c}, @var{dim})
-## Prepend the scalar value @var{c} to the vector @var{x} until it is of length
+## @deftypefn  {} {@var{B} =} prepad (@var{A}, @var{l})
+## @deftypefnx {} {@var{B} =} prepad (@var{A}, @var{l}, @var{c})
+## @deftypefnx {} {@var{B} =} prepad (@var{A}, @var{l}, @var{c}, @var{dim})
+## Prepend the scalar value @var{c} to the vector @var{A} until it is of length
 ## @var{l}.  If @var{c} is not given, a value of 0 is used.
 ##
-## If @code{length (@var{x}) > @var{l}}, elements from the beginning of @var{x}
+## If @code{length (@var{A}) > @var{l}}, elements from the beginning of @var{A}
 ## are removed until a vector of length @var{l} is obtained.
 ##
-## If @var{x} is a matrix, elements are prepended or removed from each row.
+## If @var{A} is a matrix, elements are prepended or removed from each row.
 ##
 ## If the optional argument @var{dim} is given, operate along this dimension.
 ##
-## If @var{dim} is larger than the dimensions of @var{x}, the result will have
+## If @var{dim} is larger than the dimensions of @var{A}, the result will have
 ## @var{dim} dimensions.
 ## @seealso{postpad, cat, resize}
 ## @end deftypefn
 
-function y = prepad (x, l, c, dim)
+function B = prepad (A, l, c, dim)
 
   if (nargin < 2)
     print_usage ();
@@ -56,8 +56,8 @@
     endif
   endif
 
-  nd = ndims (x);
-  sz = size (x);
+  nd = ndims (A);
+  sz = size (A);
   if (nargin < 4)
     ## Find the first non-singleton dimension.
     (dim = find (sz > 1, 1)) || (dim = 1);
@@ -84,14 +84,14 @@
     ##    ml = max (numel (v1), numel (v2));
     ##    v1 = prepad (v1, ml);
     ##    v2 = prepad (v2, ml);
-    y = x;
+    B = A;
   elseif (d >= l)
     idx = repmat ({':'}, nd, 1);
     idx{dim} = d-l+1:d;
-    y = x(idx{:});
+    B = A(idx{:});
   else
     sz(dim) = l - d;
-    y = cat (dim, c(ones (sz)), x);
+    B = cat (dim, c(ones (sz)), A);
   endif
 
 endfunction
--- a/scripts/general/quadgk.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/general/quadgk.m	Mon Aug 29 13:58:00 2022 +0200
@@ -27,7 +27,7 @@
 ## @deftypefn  {} {@var{q} =} quadgk (@var{f}, @var{a}, @var{b})
 ## @deftypefnx {} {@var{q} =} quadgk (@var{f}, @var{a}, @var{b}, @var{abstol})
 ## @deftypefnx {} {@var{q} =} quadgk (@var{f}, @var{a}, @var{b}, @var{abstol}, @var{trace})
-## @deftypefnx {} {@var{q} =} quadgk (@var{f}, @var{a}, @var{b}, @var{prop}, @var{val}, @dots{})
+## @deftypefnx {} {@var{q} =} quadgk (@var{f}, @var{a}, @var{b}, "@var{prop}", @var{val}, @dots{})
 ## @deftypefnx {} {[@var{q}, @var{err}] =} quadgk (@dots{})
 ##
 ## Numerically evaluate the integral of @var{f} from @var{a} to @var{b}
@@ -35,7 +35,8 @@
 ##
 ## @var{f} is a function handle, inline function, or string containing the name
 ## of the function to evaluate.  The function @var{f} must be vectorized and
-## return a vector of output values when given a vector of input values.
+## return a vector of output values when given a vector of input values (See
+## property @qcode{"ArrayValued"} for an exception to this rule).
 ##
 ## @var{a} and @var{b} are the lower and upper limits of integration.  Either
 ## or both limits may be infinite or contain weak end singularities.  Variable
@@ -51,7 +52,7 @@
 ## operator @code{./} and all user functions to @code{quadgk} should do the
 ## same.
 ##
-## The optional argument @var{tol} defines the absolute tolerance used to stop
+## The optional argument @var{abstol} defines the absolute tolerance used to stop
 ## the integration procedure.  The default value is 1e-10 (1e-5 for single).
 ##
 ## The algorithm used by @code{quadgk} involves subdividing the integration
@@ -60,8 +61,8 @@
 ## subintervals at this step, (2) the current estimate of the error @var{err},
 ## (3) the current estimate for the integral @var{q}.
 ##
-## The behavior of the algorithm can be configured by passing arguments
-## to @code{quadgk} as pairs @qcode{"@var{prop}", @var{val}}.  Valid properties
+## The behavior of the algorithm can be configured by passing arguments to
+## @code{quadgk} as pairs @qcode{"@var{prop}", @var{val}}.  Valid properties
 ## are
 ##
 ## @table @code
@@ -73,28 +74,52 @@
 ## Define the relative error tolerance for the quadrature.  The default
 ## relative tolerance is 1e-6 (1e-4 for single).
 ##
-## @item MaxIntervalCount
-## @code{quadgk} initially subdivides the interval on which to perform the
-## quadrature into 10 intervals.  Subintervals that have an unacceptable error
-## are subdivided and re-evaluated.  If the number of subintervals exceeds 650
-## subintervals at any point then a poor convergence is signaled and the
-## current estimate of the integral is returned.  The property
-## @qcode{"MaxIntervalCount"} can be used to alter the number of subintervals
-## that can exist before exiting.
+## @item ArrayValued
+## When set to true, the function @var{f} produces an array output for a scalar
+## input.  The default is false which requires that @var{f} produce an output
+## that is the same size as the input.  For example,
+##
+## @example
+## quadgk (@@(x) x .^ (1:5), 0, 2, "ArrayValued", 1)
+## @end example
+##
+## will integrate @code{[x.^1, x.^2, x.^3, x.^4, x.^5]} in one function call
+## rather than having to repeatedly define a single anonymous function and
+## use a normal invocation of @code{quadgk}.
 ##
 ## @item WayPoints
-## Discontinuities in the first derivative of the function to integrate can be
-## flagged with the @qcode{"WayPoints"} property.  This forces the ends of a
-## subinterval to fall on the breakpoints of the function and can result in
-## significantly improved estimation of the error in the integral, faster
-## computation, or both.  For example,
+## Specify points which will become endpoints for subintervals in the
+## algorithm which can result in significantly improved estimation of the error
+## in the integral, faster computation, or both.  It can be useful to specify
+## more subintervals around a region where the integrand is rapidly changing or
+## to flag locations where there is a discontinuity in the first derivative
+## of the function.  For example, the signum function has a discontinuity at
+## @code{x == 0} and by specifying a waypoint
 ##
 ## @example
-## quadgk (@@(x) abs (1 - x.^2), 0, 2, "Waypoints", 1)
+## quadgk (@@(x) sign (x), -0.5, 1, "Waypoints", [0])
 ## @end example
 ##
 ## @noindent
-## signals the breakpoint in the integrand at @code{@var{x} = 1}.
+## the error bound is reduced from 4e-7 to 1e-13.
+##
+## If the function has @strong{singularities} within the region of integration
+## those should not be addressed with waypoints.  Instead, the overall integral
+## should be decomposed into a sum of several smaller integrals such that the
+## singularity occurs as one of the bounds of integration in the call to
+## @code{quadgk}.
+##
+## If any of the waypoints are complex then contour integration is performed as
+## documented below.
+##
+## @item MaxIntervalCount
+## @code{quadgk} initially subdivides the interval on which to perform the
+## quadrature into 10 intervals or, if WayPoints are given, at each waypoint.
+## Subintervals that have an unacceptable error are subdivided and
+## re-evaluated.  If the number of subintervals exceeds 650 subintervals at any
+## point then a poor convergence is signaled and the current estimate of the
+## integral is returned.  The property @qcode{"MaxIntervalCount"} can be used
+## to alter the number of subintervals that can exist before exiting.
 ##
 ## @item Trace
 ## If logically true @code{quadgk} prints information on the convergence of the
@@ -102,7 +127,7 @@
 ## @end table
 ##
 ## If any of @var{a}, @var{b}, or @var{waypoints} is complex then the
-## quadrature is treated as a contour integral along a piecewise continuous
+## quadrature is treated as a contour integral along a piecewise linear
 ## path defined by
 ## @code{[@var{a}, @var{waypoints}(1), @var{waypoints}(2), @dots{}, @var{b}]}.
 ## In this case the integral is assumed to have no edge singularities.  For
@@ -123,7 +148,12 @@
 ##
 ## @var{err} is an approximate bound on the error in the integral
 ## @w{@code{abs (@var{q} - @var{I})}}, where @var{I} is the exact value of the
-## integral.
+## integral.  If the adaptive integration did not converge, the value of
+## @var{err} will be larger than the requested tolerance.  If only a single
+## output is requested then a warning will be emitted when the requested
+## tolerance is not met.  If the second output @var{err} is requested then no
+## warning is issued and it is the responsibility of the programmer to inspect
+## and determine whether the results are satisfactory.
 ##
 ## Reference: @nospell{L.F. Shampine},
 ## @cite{"Vectorized adaptive quadrature in @sc{matlab}"}, Journal of
@@ -131,7 +161,7 @@
 ## Feb 2008.
 ##
 ## @seealso{quad, quadv, quadl, quadcc, trapz, dblquad, triplequad, integral,
-##           integral2, integral3}
+##          integral2, integral3}
 ## @end deftypefn
 
 function [q, err] = quadgk (f, a, b, varargin)
@@ -140,17 +170,11 @@
     print_usage ();
   endif
 
-  if (b < a)
-    ## Reverse integration
-    [q, err] = quadgk (f, b, a, varargin{:});
-    q = -q;
-    return;
-  endif
-
   abstol = [];
   reltol = [];
   waypoints = [];
   maxint = 650;
+  arrayvalued = false;
   trace = false;
 
   ## Parse options if present.
@@ -176,28 +200,36 @@
         if (! ischar (varargin{idx}))
           error ("quadgk: property PROP must be a string");
         endif
-        str = varargin{idx++};
-        switch (tolower (str))
+        prop = varargin{idx++};
+        switch (tolower (prop))
           case "reltol"
             reltol = varargin{idx++};
           case "abstol"
             abstol = varargin{idx++};
           case "waypoints"
             waypoints = varargin{idx++}(:);
-            if (isreal (waypoints))
-              waypoints(waypoints < a | waypoints > b) = [];
-            endif
           case "maxintervalcount"
             maxint = varargin{idx++};
+          case "arrayvalued"
+            arrayvalued = varargin{idx++};
           case "trace"
             trace = varargin{idx++};
           otherwise
-            error ("quadgk: unknown property '%s'", str);
+            error ("quadgk: unknown property '%s'", prop);
         endswitch
       endwhile
     endif
   endif
 
+  reverse = 1;
+  contour = iscomplex (a) || iscomplex (b) || iscomplex (waypoints);
+  if ((b < a) && ! contour)
+    ## Reverse integration
+    [b, a] = deal (a, b);
+    waypoints = sort (waypoints(waypoints > a & waypoints < b));
+    reverse = -1;
+  endif
+
   issingle = (isa (a, "single") || isa (b, "single")
               || isa (waypoints, "single"));
 
@@ -213,6 +245,9 @@
     error ("quadgk: RELTOL must be a scalar >=0");
   endif
 
+  ## FIXME: No validation of inputs MaxIntervalCount, Waypoints, ArrayValued,
+  ##        Trace.
+
   ## Convert function given as a string to a function handle
   if (ischar (f))
     f = @(x) feval (f, x);
@@ -221,12 +256,13 @@
   ## Use variable substitution to weaken endpoint singularities and
   ## to perform integration with endpoints at infinity.
   ## No transform for contour integrals.
-  if (iscomplex (a) || iscomplex (b) || iscomplex (waypoints))
+  if (contour)
     ## contour integral, no transform
     subs = [a; waypoints; b];
     h = sum (abs (diff (subs)));
-    h0 = h;
     trans = @(t) t;
+    ## Ensure f is always vectorized even if specified as, e.g., f = @(x) 1;
+    f = @(t) f (t) + 0*t;
   elseif (isinf (a) && isinf (b))
     ## Standard infinite to finite integral transformation.
     ##   \int_{-\infinity_^\infinity f(x) dx = \int_-1^1 f (g(t)) g'(t) dt
@@ -242,7 +278,6 @@
       subs = linspace (-1, 1, 11)';
     endif
     h = 2;
-    h0 = b - a;
     trans = @(t) t ./ (1 - t.^2);
     f = @(t) f (t ./ (1 - t .^ 2)) .* (1 + t .^ 2) ./ ((1 - t .^ 2) .^ 2);
   elseif (isinf (a))
@@ -268,7 +303,6 @@
       subs = linspace (-1, 0, 11)';
     endif
     h = 1;
-    h0 = b - a;
     trans = @(t) b - (t ./ (1 + t)).^2;
     f = @(s) - 2 * s .* f (b -  (s ./ (1 + s)) .^ 2) ./ ((1 + s) .^ 3);
   elseif (isinf (b))
@@ -293,7 +327,6 @@
       subs = linspace (0, 1, 11)';
     endif
     h = 1;
-    h0 = b - a;
     trans = @(t) a + (t ./ (1 - t)).^2;
     f = @(s) 2 * s .* f (a +  (s ./ (1 - s)) .^ 2) ./ ((1 - s) .^ 3);
   else
@@ -315,7 +348,6 @@
       subs = linspace (-1, 1, 11)';
     endif
     h = 2;
-    h0 = b - a;
     trans = @(t) ((b - a) ./ 4) * t .* (3 - t.^2) + (b + a) ./ 2;
     f = @(t) f((b - a) ./ 4 .* t .* (3 - t.^2) + (b + a) ./ 2) .* ...
          3 .* (b - a) ./ 4 .* (1 - t.^2);
@@ -323,92 +355,170 @@
 
   ## Split interval into at least 10 subinterval with a 15 point
   ## Gauss-Kronrod rule giving a minimum of 150 function evaluations.
-  while (length (subs) < 11)
-    subs = [subs.' ; subs(1:end-1).' + diff(subs.') ./ 2, NaN](:)(1 : end - 1);
+  while (numel (subs) < 11)
+    subs = [subs.' ; subs(1:end-1).' + diff(subs.') ./ 2, NaN](:)(1:end-1);
   endwhile
   subs = [subs(1:end-1), subs(2:end)];
 
   warn_id = "Octave:quadgk:warning-termination";
 
-  if (issingle)
-    eps1 = eps ("single");
-  else
-    eps1 = eps ("double");
-  endif
+  if (! arrayvalued)
+    ## Initial evaluation of the integrand on the subintervals.
+    [q_subs, q_errs] = __quadgk_eval__ (f, subs, trans);
+    q0 = sum (q_subs);
+    err0 = sum (q_errs);
 
-  ## Initial evaluation of the integrand on the subintervals
-  [q_subs, q_errs] = __quadgk_eval__ (f, subs, eps1, trans);
-  q0 = sum (q_subs);
-  err0 = sum (q_errs);
+    first = true;
+    while (true)
+      ## Quit if any evaluations are not finite (Inf or NaN).
+      if (any (! isfinite (q_subs)))
+        warning (warn_id, "quadgk: non-finite integrand encountered");
+        q = q0;
+        err = err0;
+        break;
+      endif
+
+      tol = max (abstol, reltol .* abs (q0));
+
+      ## If the global error estimate is met then exit.
+      if (err0 <= tol)
+        q = q0;
+        err = err0;
+        break;
+      endif
 
-  first = true;
-  while (true)
-    ## Quit if any evaluations are not finite (Inf or NaN).
-    if (any (! isfinite (q_subs)))
-      warning (warn_id, "quadgk: non-finite integrand encountered");
-      q = q0;
-      err = err0;
-      break;
-    endif
+      ## Accept the subintervals that meet the convergence criteria.
+      idx = find (abs (q_errs) < tol .* abs (diff (subs, 1, 2)) ./ h);
+      if (first)
+        q = sum (q_subs(idx));
+        err = sum (q_errs(idx));
+        first = false;
+      else
+        q0 = q + sum (q_subs);
+        err0 = err + sum (q_errs);
+        q += sum (q_subs(idx));
+        err += sum (q_errs(idx));
+      endif
+      subs(idx,:) = [];
+
+      ## If no remaining subintervals then exit.
+      if (isempty (subs))
+        break;
+      endif
 
-    tol = max (abstol, reltol .* abs (q0));
+      if (trace)
+        disp ([rows(subs), err, q0]);
+      endif
+
+      ## Split remaining subintervals in two
+      mid = (subs(:,1) + subs(:,2)) ./ 2;
+      subs = [subs(:,1), mid; mid, subs(:,2)];
 
-    ## If the global error estimate is met then exit
-    if (err0 < tol)
-      q = q0;
-      err = err0;
-      break;
+      ## If the maximum subinterval count is met, then
+      ## accept remaining subinterval and exit.
+      if (rows (subs) > maxint)
+        warning (warn_id, "quadgk: maximum interval count (%d) exceeded", maxint);
+        q += sum (q_subs);
+        err += sum (q_errs);
+        break;
+      endif
+
+      ## Evaluation of the integrand on the remaining subintervals
+      [q_subs, q_errs] = __quadgk_eval__ (f, subs, trans);
+    endwhile
+
+    if (nargout < 2 && err > max (abstol, reltol * abs (q)))
+      warning (warn_id,
+               "quadgk: Error tolerance not met.  Estimated error %g", err);
     endif
 
-    ## Accept the subintervals that meet the convergence criteria.
-    idx = find (abs (q_errs) < tol .* abs (diff (subs, [], 2)) ./ h);
-    if (first)
-      q = sum (q_subs(idx));
-      err = sum (q_errs(idx));
-      first = false;
-    else
-      q0 = q + sum (q_subs);
-      err0 = err + sum (q_errs);
-      q += sum (q_subs(idx));
-      err += sum (q_errs(idx));
-    endif
-    subs(idx,:) = [];
+    ## Reverse integral if necessary.
+    q = reverse * q;
+
+  else
+    ## f is array-valued
+    sz = size (f (subs(1)));
+
+    ## Initial evaluation of the integrand on the subintervals
+    [q_subs, q_errs] = __quadgk_eval_array__ (f, subs, trans, prod (sz));
+    q0 = sum (q_subs, 1);
+    err0 = sum (q_errs, 1);
+
+    first = true;
+    while (true)
+      ## Quit if any evaluations are not finite (Inf or NaN).
+      if (any (! isfinite (q_subs)(:)))
+        warning (warn_id, "quadgk: non-finite integrand encountered");
+        q = q0;
+        err = err0;
+        break;
+      endif
+
+      tol = max (abstol, reltol .* abs (q0));
+
+      ## If the global error estimate is met then exit
+      if (err0 <= tol)
+        q = q0;
+        err = err0;
+        break;
+      endif
 
-    ## If no remaining subintervals exit
-    if (rows (subs) == 0)
-      break;
+      ## Accept subintervals that meet the convergence criteria in all entries.
+      idx = find (all (abs (q_errs) < tol .* abs (diff (subs, 1, 2)) ./ h, 2));
+      if (first)
+        q = sum (q_subs(idx,:), 1);
+        err = sum (q_errs(idx,:), 1);
+        first = false;
+      else
+        q0 = q + sum (q_subs, 1);
+        err0 = err + sum (q_errs, 1);
+        q += sum (q_subs(idx,:), 1);
+        err += sum (q_errs(idx,:), 1);
+      endif
+      subs(idx,:) = [];
+
+      ## If no remaining subintervals exit
+      if (isempty (subs))
+        break;
+      endif
+
+      if (trace)
+        disp ([rows(subs), err(1, 1), q0(1, 1)]); # print only first entry
+      endif
+
+      ## Split remaining subintervals in two
+      mid = (subs(:,1) + subs(:,2)) ./ 2;
+      subs = [subs(:,1), mid; mid, subs(:,2)];
+
+      ## If the maximum subinterval count is met accept remaining subinterval
+      ## and exit
+      if (rows (subs) > maxint)
+        warning (warn_id, "quadgk: maximum interval count (%d) exceeded", maxint);
+        q += sum (q_subs, 1);
+        err += sum (q_errs, 1);
+        break;
+      endif
+
+      ## Evaluation of the integrand on the remaining subintervals
+      [q_subs, q_errs] = __quadgk_eval_array__ (f, subs, trans, prod (sz));
+    endwhile
+
+    i = find (err > max (abstol, reltol * abs (q)), 1);
+    if (nargout < 2 && length (i) > 0)
+      ## like ind2sub, only as vector.
+      j = mod (floor ((i-1)./cumprod ([1 sz(1:end-1)])),sz)+1;
+      s = ["(" sprintf("%d,",j)(1:end-1) ")"];
+      warning (warn_id,
+               "quadgk: Error tolerance not met.  First entry at index %s with estimated error %g", s, err(i));
     endif
 
-    if (trace)
-      disp ([rows(subs), err, q0]);
-    endif
-
-    ## Split remaining subintervals in two
-    mid = (subs(:,2) + subs(:,1)) ./ 2;
-    subs = [subs(:,1), mid; mid, subs(:,2)];
-
-    ## If the maximum subinterval count is met accept remaining subinterval
-    ## and exit
-    if (rows (subs) > maxint)
-      warning (warn_id, "quadgk: maximum interval count (%d) exceeded", maxint);
-      q += sum (q_subs);
-      err += sum (q_errs);
-      break;
-    endif
-
-    ## Evaluation of the integrand on the remaining subintervals
-    [q_subs, q_errs] = __quadgk_eval__ (f, subs, eps1, trans);
-  endwhile
-
-  if (err > max (abstol, reltol * abs (q)))
-    warning (warn_id,
-             "quadgk: Error tolerance not met.  Estimated error %g", err);
+    q = reverse * reshape (q, sz);
+    err = reshape (err, sz);
   endif
 
 endfunction
 
-## FIXME: too_close output is never used in function that calls this one.
-function [q, err, too_close] = __quadgk_eval__ (f, subs, eps1, trans)
+function [q, err] = __quadgk_eval__ (f, subs, trans)
 
   ## A (15,7) point pair of Gauss-Kronrod quadrature rules.
   ## The abscissa and weights are copied directly from dqk15w.f from quadpack.
@@ -438,20 +548,11 @@
              0.3818300505051889e+00,  0.2797053914892767e+00, ...
              0.1294849661688697e+00]);
 
-  halfwidth = diff (subs, [], 2) ./ 2;
+  halfwidth = diff (subs, 1, 2) ./ 2;
   center = sum (subs, 2) ./ 2;
   t = (halfwidth * abscissa) + center;
   x = trans ([t(:,1), t(:,end)]);
 
-  ## Shampine suggests 100 * eps1, beginning of section 6.
-  if (any (abs (diff (x, [], 2) ./ max (abs (x), [], 2))) < 100 * eps1)
-    too_close = true;
-    q = 0;
-    err = 0;
-    return;
-  endif
-
-  too_close = false;
   y = reshape (f (t(:)), size (t));
 
   ## This is faster than using bsxfun as the * operator can use a
@@ -461,6 +562,54 @@
 
 endfunction
 
+function [q, err] = __quadgk_eval_array__ (f, subs, trans, nel)
+
+  ## A (15,7) point pair of Gauss-Kronrod quadrature rules.
+  ## The abscissa and weights are copied directly from dqk15w.f from quadpack.
+
+  persistent abscissa = [-0.9914553711208126e+00, -0.9491079123427585e+00, ...
+                         -0.8648644233597691e+00, -0.7415311855993944e+00, ...
+                         -0.5860872354676911e+00, -0.4058451513773972e+00, ...
+                         -0.2077849550078985e+00,  0.0000000000000000e+00, ...
+                          0.2077849550078985e+00,  0.4058451513773972e+00, ...
+                          0.5860872354676911e+00,  0.7415311855993944e+00, ...
+                          0.8648644233597691e+00,  0.9491079123427585e+00, ...
+                          0.9914553711208126e+00];
+
+  persistent weights15 = ...
+            [0.2293532201052922e-01,  0.6309209262997855e-01, ...
+             0.1047900103222502e+00,  0.1406532597155259e+00, ...
+             0.1690047266392679e+00,  0.1903505780647854e+00, ...
+             0.2044329400752989e+00,  0.2094821410847278e+00, ...
+             0.2044329400752989e+00,  0.1903505780647854e+00, ...
+             0.1690047266392679e+00,  0.1406532597155259e+00, ...
+             0.1047900103222502e+00,  0.6309209262997855e-01, ...
+             0.2293532201052922e-01];
+
+  persistent weights7 = ...
+            [0.1294849661688697e+00,  0.2797053914892767e+00, ...
+             0.3818300505051889e+00,  0.4179591836734694e+00, ...
+             0.3818300505051889e+00,  0.2797053914892767e+00, ...
+             0.1294849661688697e+00];
+
+  halfwidth = diff (subs, 1, 2) ./ 2;
+  center = sum (subs, 2) ./ 2;
+  t = (halfwidth * abscissa) + center;
+  x = trans ([t(:,1), t(:,end)]);
+
+  y = zeros (nel, columns(t), rows(t));
+  for i = 1:rows (t)
+    for j = 1:columns(t)
+      y(:,j,i) = f (t(i,j))(:);
+    endfor
+  endfor
+  y = permute (y, [2 3 1]);
+
+  q = reshape (weights15 * y(:,:), [rows(t), nel]) .* halfwidth;
+  err = abs (reshape (weights7 * y(2:2:end,:), rows (t), nel) .* halfwidth - q);
+
+endfunction
+
 function t = __quadgk_finite_waypoint__ (x, a, b)
   c = (-4 .* x + 2.* (b + a)) ./ (b - a);
   k = ((sqrt (c .^ 2 - 4) + c) ./ 2) .^ (1/3);
@@ -469,7 +618,9 @@
 
 
 %!assert (quadgk (@sin,-pi,pi), 0, 1e-10)
-%!assert (quadgk (inline ("sin"),-pi,pi), 0, 1e-10)
+%!test
+%! warning ("off", "Octave:legacy-function", "local");
+%! assert (quadgk (inline ("sin"), -pi, pi), 0, 1e-10);
 %!assert (quadgk ("sin",-pi,pi), 0, 1e-10)
 %!assert (quadgk (@sin,-pi,pi, "WayPoints", 0, "MaxIntervalCount", 100,
 %!                "RelTol", 1e-3, "AbsTol", 1e-6, "trace", false), 0, 1e-6)
@@ -495,6 +646,19 @@
 %! f = @(x) x .^ 5 .* exp (-x) .* sin (x);
 %! assert (quadgk (f, 0, Inf, "RelTol", 1e-8, "AbsTol", 1e-12), -15, -1e-8);
 
+## Test vector-valued functions
+%!assert (quadgk (@(x) [(sin (x)), (sin (2 * x))], 0, pi, "arrayvalued", 1),
+%!        [2, 0], 1e-6)
+
+## Test matrix-valued functions
+%!assert (quadgk (@(x) [ x,x,x; x,1./sqrt(x),x; x,x,x ], 0, 1, "arrayvalued",1),
+%!        [0.5,0.5,0.5; 0.5,2,0.5; 0.5,0.5,0.5], 15*1e-6);
+
+## Bug #62412
+%!warning <Error tolerance not met>
+%! f = @(t) -1 ./ t.^1.1;
+%! quadgk (f, 1, Inf);
+
 ## Test input validation
 %!error quadgk (@sin)
 %!error quadgk (@sin, 0)
--- a/scripts/general/quadl.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/general/quadl.m	Mon Aug 29 13:58:00 2022 +0200
@@ -28,7 +28,7 @@
 ## @deftypefnx {} {@var{q} =} quadl (@var{f}, @var{a}, @var{b}, @var{tol})
 ## @deftypefnx {} {@var{q} =} quadl (@var{f}, @var{a}, @var{b}, @var{tol}, @var{trace})
 ## @deftypefnx {} {@var{q} =} quadl (@var{f}, @var{a}, @var{b}, @var{tol}, @var{trace}, @var{p1}, @var{p2}, @dots{})
-## @deftypefnx {} {[@var{q}, @var{nfun}] =} quadl (@dots{})
+## @deftypefnx {} {[@var{q}, @var{nfev}] =} quadl (@dots{})
 ##
 ## Numerically evaluate the integral of @var{f} from @var{a} to @var{b} using
 ## an adaptive @nospell{Lobatto} rule.
@@ -55,7 +55,7 @@
 ##
 ## The result of the integration is returned in @var{q}.
 ##
-## The optional output @var{nfun} indicates the total number of function
+## The optional output @var{nfev} indicates the total number of function
 ## evaluations performed.
 ##
 ## Reference: @nospell{W. Gander and W. Gautschi}, @cite{Adaptive Quadrature -
@@ -72,7 +72,7 @@
 ## 2003-08-05 Shai Ayal
 ##   * permission from author to release as GPL
 
-function [q, nfun] = quadl (f, a, b, tol = [], trace = false, varargin)
+function [q, nfev] = quadl (f, a, b, tol = [], trace = false, varargin)
 
   if (nargin < 3)
     print_usage ();
@@ -97,17 +97,17 @@
   endif
 
   y = feval (f, [a, b], varargin{:});
-  nfun = 1;
+  nfev = 1;
 
   fa = y(1);
   fb = y(2);
 
   h = b - a;
 
-  [q, nfun, hmin] = adaptlobstp (f, a, b, fa, fb, Inf, nfun, abs (h),
+  [q, nfev, hmin] = adaptlobstp (f, a, b, fa, fb, Inf, nfev, abs (h),
                                  tol, trace, varargin{:});
 
-  if (nfun > 10_000)
+  if (nfev > 10_000)
     warning ("quadl: maximum iteration count reached -- possible singular integral");
   elseif (any (! isfinite (q(:))))
     warning ("quadl: infinite or NaN function evaluations were returned");
@@ -117,13 +117,13 @@
 
 endfunction
 
-function [q, nfun, hmin] = adaptlobstp (f, a, b, fa, fb, q0, nfun, hmin,
+function [q, nfev, hmin] = adaptlobstp (f, a, b, fa, fb, q0, nfev, hmin,
                                         tol, trace, varargin)
 
   persistent alpha = sqrt (2/3);
   persistent beta = 1 / sqrt (5);
 
-  if (nfun > 10_000)
+  if (nfev > 10_000)
     q = q0;
     return;
   endif
@@ -136,7 +136,7 @@
   mrr = m + alpha*h;
   x = [mll, ml, m, mr, mrr];
   y = feval (f, x, varargin{:});
-  nfun += 1;
+  nfev += 1;
   fmll = y(1);
   fml  = y(2);
   fm   = y(3);
@@ -150,25 +150,25 @@
   endif
 
   if (trace)
-    disp ([nfun, a, b-a, i1]);
+    disp ([nfev, a, b-a, i1]);
   endif
 
-  ## Force at least one adaptive step (nfun > 2 test).
-  if ((abs (i1-i2) < tol || mll <= a || b <= mrr) && nfun > 2)
+  ## Force at least one adaptive step (nfev > 2 test).
+  if ((abs (i1-i2) < tol || mll <= a || b <= mrr) && nfev > 2)
     q = i1;
   else
     q = zeros (6, 1, class (x));
-    [q(1), nfun, hmin] = adaptlobstp (f, a  , mll, fa  , fmll, q0/6, nfun, hmin,
+    [q(1), nfev, hmin] = adaptlobstp (f, a  , mll, fa  , fmll, q0/6, nfev, hmin,
                                       tol, trace, varargin{:});
-    [q(2), nfun, hmin] = adaptlobstp (f, mll, ml , fmll, fml , q0/6, nfun, hmin,
+    [q(2), nfev, hmin] = adaptlobstp (f, mll, ml , fmll, fml , q0/6, nfev, hmin,
                                       tol, trace, varargin{:});
-    [q(3), nfun, hmin] = adaptlobstp (f, ml , m  , fml , fm  , q0/6, nfun, hmin,
+    [q(3), nfev, hmin] = adaptlobstp (f, ml , m  , fml , fm  , q0/6, nfev, hmin,
                                       tol, trace, varargin{:});
-    [q(4), nfun, hmin] = adaptlobstp (f, m  , mr , fm  , fmr , q0/6, nfun, hmin,
+    [q(4), nfev, hmin] = adaptlobstp (f, m  , mr , fm  , fmr , q0/6, nfev, hmin,
                                       tol, trace, varargin{:});
-    [q(5), nfun, hmin] = adaptlobstp (f, mr , mrr, fmr , fmrr, q0/6, nfun, hmin,
+    [q(5), nfev, hmin] = adaptlobstp (f, mr , mrr, fmr , fmrr, q0/6, nfev, hmin,
                                       tol, trace, varargin{:});
-    [q(6), nfun, hmin] = adaptlobstp (f, mrr, b  , fmrr, fb  , q0/6, nfun, hmin,
+    [q(6), nfev, hmin] = adaptlobstp (f, mrr, b  , fmrr, fb  , q0/6, nfev, hmin,
                                       tol, trace, varargin{:});
     q = sum (q);
   endif
@@ -189,11 +189,11 @@
 
 ## test different tolerances.
 %!test
-%! [q, nfun1] = quadl (@(x) sin (2 + 3*x).^2, 0, 10, 0.5, []);
+%! [q, nfev1] = quadl (@(x) sin (2 + 3*x).^2, 0, 10, 0.5, []);
 %! assert (q, (60 + sin (4) - sin (64))/12, 0.5);
-%! [q, nfun2] = quadl (@(x) sin (2 + 3*x).^2, 0, 10, 0.1, []);
+%! [q, nfev2] = quadl (@(x) sin (2 + 3*x).^2, 0, 10, 0.1, []);
 %! assert (q, (60 + sin (4) - sin (64))/12, 0.1);
-%! assert (nfun2 > nfun1);
+%! assert (nfev2 > nfev1);
 
 %!test  # test single input/output
 %! assert (class (quadl (@sin, 0, 1)), "double");
--- a/scripts/general/quadv.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/general/quadv.m	Mon Aug 29 13:58:00 2022 +0200
@@ -28,7 +28,7 @@
 ## @deftypefnx {} {@var{q} =} quadv (@var{f}, @var{a}, @var{b}, @var{tol})
 ## @deftypefnx {} {@var{q} =} quadv (@var{f}, @var{a}, @var{b}, @var{tol}, @var{trace})
 ## @deftypefnx {} {@var{q} =} quadv (@var{f}, @var{a}, @var{b}, @var{tol}, @var{trace}, @var{p1}, @var{p2}, @dots{})
-## @deftypefnx {} {[@var{q}, @var{nfun}] =} quadv (@dots{})
+## @deftypefnx {} {[@var{q}, @var{nfev}] =} quadv (@dots{})
 ##
 ## Numerically evaluate the integral of @var{f} from @var{a} to @var{b}
 ## using an adaptive Simpson's rule.
@@ -57,7 +57,7 @@
 ##
 ## The result of the integration is returned in @var{q}.
 ##
-## The optional output @var{nfun} indicates the total number of function
+## The optional output @var{nfev} indicates the total number of function
 ## evaluations performed.
 ##
 ## Note: @code{quadv} is written in Octave's scripting language and can be
@@ -70,7 +70,7 @@
 ## Algorithm: See https://en.wikipedia.org/wiki/Adaptive_Simpson%27s_method
 ## for basic explanation.  See NOTEs and FIXME for Octave modifications.
 
-function [q, nfun] = quadv (f, a, b, tol = [], trace = false, varargin)
+function [q, nfev] = quadv (f, a, b, tol = [], trace = false, varargin)
 
   if (nargin < 3)
     print_usage ();
@@ -89,7 +89,7 @@
 
   if (trace)
     ## Print column headers once above trace display.
-    printf ("  nfun          a            (b - a)         q_interval\n");
+    printf ("  nfev          a            (b - a)         q_interval\n");
   endif
 
   ## NOTE: Split the interval into 3 parts which avoids problems with periodic
@@ -110,46 +110,46 @@
   fb2 = feval (f, b2, varargin{:});
   fc3 = feval (f, c3, varargin{:});
   fb  = feval (f, b,  varargin{:});
-  nfun = 7;
+  nfev = 7;
 
   ## NOTE: If there are edge singularities, move edge point by eps*(b-a) as
   ## discussed in Shampine paper used to implement quadgk.
   if (any (isinf (fa(:))))
     fa = feval (f, a + eps * (b-a), varargin{:});
-    nfun++;
+    nfev++;
   endif
   if (any (isinf (fb(:))))
     fb = feval (f, b - eps * (b-a), varargin{:});
-    nfun++;
+    nfev++;
   endif
 
   ## Region 1
   h = (b1 - a);
   q1 = h / 6 * (fa + 4*fc1 + fb1);
 
-  [q1, nfun, hmin1] = simpsonstp (f, a, b1, c1, fa, fb1, fc1, q1, tol,
-                                  nfun, abs (h), trace, varargin{:});
+  [q1, nfev, hmin1] = simpsonstp (f, a, b1, c1, fa, fb1, fc1, q1, tol,
+                                  nfev, abs (h), trace, varargin{:});
 
   ## Region 2
   h = (b2 - b1);
   q2 = h / 6 * (fb1 + 4*fc2 + fb2);
 
-  [q2, nfun, hmin2] = simpsonstp (f, b1, b2, c2, fb1, fb2, fc2, q2, tol,
-                                  nfun, abs (h), trace, varargin{:});
+  [q2, nfev, hmin2] = simpsonstp (f, b1, b2, c2, fb1, fb2, fc2, q2, tol,
+                                  nfev, abs (h), trace, varargin{:});
 
   ## Region 3
   h = (b - b2);
   q3 = h / 6 * (fb2 + 4*fc3 + fb);
 
-  [q3, nfun, hmin3] = simpsonstp (f, b2, b, c3, fb2, fb, fc3, q3, tol,
-                                  nfun, abs (h), trace, varargin{:});
+  [q3, nfev, hmin3] = simpsonstp (f, b2, b, c3, fb2, fb, fc3, q3, tol,
+                                  nfev, abs (h), trace, varargin{:});
 
   ## Total integral over all 3 regions and verify results
   q = q1 + q2 + q3;
 
   hmin = min ([hmin1, hmin2, hmin3]);
 
-  if (nfun > 10_000)
+  if (nfev > 10_000)
     warning ("quadv: maximum iteration count reached -- possible singular integral");
   elseif (any (! isfinite (q(:))))
     warning ("quadv: infinite or NaN function evaluations were returned");
@@ -159,10 +159,10 @@
 
 endfunction
 
-function [q, nfun, hmin] = simpsonstp (f, a, b, c, fa, fb, fc, q0, tol,
-                                       nfun, hmin, trace, varargin)
+function [q, nfev, hmin] = simpsonstp (f, a, b, c, fa, fb, fc, q0, tol,
+                                       nfev, hmin, trace, varargin)
 
-  if (nfun > 10_000)   # stop endless recursion
+  if (nfev > 10_000)   # stop endless recursion
     q = q0;
     return;
   endif
@@ -171,7 +171,7 @@
   e = (c + b) / 2;
   fd = feval (f, d, varargin{:});
   fe = feval (f, e, varargin{:});
-  nfun += 2;
+  nfev += 2;
   q1 = (c - a) / 6 * (fa + 4*fd + fc);
   q2 = (b - c) / 6 * (fc + 4*fe + fb);
   q = q1 + q2;
@@ -184,7 +184,7 @@
 
   if (trace)
     printf ("%5d   %#14.11g   %16.10e   %-16.11g\n",
-            nfun,  a,         b-a,      q + delta/15);
+            nfev,  a,         b-a,      q + delta/15);
   endif
 
   ## NOTE: Not vectorizing q-q0 in the norm provides a more rigid criterion
@@ -194,10 +194,10 @@
     ## each bisection interval should use tol/2.  However, Matlab does not
     ## do this, and it would also profoundly increase the number of function
     ## evaluations required.
-    [q1, nfun, hmin] = simpsonstp (f, a, c, d, fa, fc, fd, q1, tol,
-                                   nfun, hmin, trace, varargin{:});
-    [q2, nfun, hmin] = simpsonstp (f, c, b, e, fc, fb, fe, q2, tol,
-                                   nfun, hmin, trace, varargin{:});
+    [q1, nfev, hmin] = simpsonstp (f, a, c, d, fa, fc, fd, q1, tol,
+                                   nfev, hmin, trace, varargin{:});
+    [q2, nfev, hmin] = simpsonstp (f, c, b, e, fc, fb, fe, q2, tol,
+                                   nfev, hmin, trace, varargin{:});
     q = q1 + q2;
   else
     q += delta / 15;   # NOTE: Richardson extrapolation correction
--- a/scripts/general/randi.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/general/randi.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,11 +24,11 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} randi (@var{imax})
-## @deftypefnx {} {} randi (@var{imax}, @var{n})
-## @deftypefnx {} {} randi (@var{imax}, @var{m}, @var{n}, @dots{})
-## @deftypefnx {} {} randi ([@var{imin} @var{imax}], @dots{})
-## @deftypefnx {} {} randi (@dots{}, "@var{class}")
+## @deftypefn  {} {@var{R} =} randi (@var{imax})
+## @deftypefnx {} {@var{R} =} randi (@var{imax}, @var{n})
+## @deftypefnx {} {@var{R} =} randi (@var{imax}, @var{m}, @var{n}, @dots{})
+## @deftypefnx {} {@var{R} =} randi ([@var{imin} @var{imax}], @dots{})
+## @deftypefnx {} {@var{R} =} randi (@dots{}, "@var{class}")
 ## Return random integers in the range 1:@var{imax}.
 ##
 ## Additional arguments determine the shape of the return matrix.  When no
@@ -37,7 +37,7 @@
 ## is returned.  Two or more arguments will return a multi-dimensional matrix
 ## @w{(@var{m} x @var{n} x @dots{})}.
 ##
-## The integer range may optionally be described by a two element matrix with a
+## The integer range may optionally be described by a two-element matrix with a
 ## lower and upper bound in which case the returned integers will be on the
 ## interval @w{[@var{imin}, @var{imax}]}.
 ##
@@ -56,10 +56,10 @@
 ## returned by the @code{flintmax} function.  For IEEE floating point numbers
 ## this value is @w{@math{2^{53} - 1}}.
 ##
-## @seealso{rand}
+## @seealso{rand, randn}
 ## @end deftypefn
 
-function ri = randi (bounds, varargin)
+function R = randi (bounds, varargin)
 
   if (nargin < 1)
     print_usage ();
@@ -121,7 +121,7 @@
     r_prim = r_prim(r_prim < K*rng);
   until (numel (r_prim) >= N)           # should practically always be true
 
-  ri = imin + floor (reshape (r_prim(1:N), varargin{:}) / K);
+  R = imin + floor (reshape (r_prim(1:N), varargin{:}) / K);
 
   if (! strcmp (rclass, "double"))
     if (strfind (rclass, "int"))
@@ -141,7 +141,7 @@
                 " Values might be truncated to requested type."]);
     endif
 
-    ri = cast (ri, rclass);
+    R = cast (R, rclass);
   endif
 
 endfunction
@@ -188,9 +188,9 @@
 %! max_single = double (flintmax ("single"));
 
 ## Test that no warning thrown if IMAX is exactly on the limits of the range
-%!function test_no_warning (func, varargin)
+%!function test_no_warning (fcn, varargin)
 %!  lastwarn ("");
-%!  func (varargin{:});
+%!  fcn (varargin{:});
 %!  assert (lastwarn (), "");
 %!endfunction
 %!test test_no_warning (@randi, max_int8, "int8");
--- a/scripts/general/repmat.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/general/repmat.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,11 +24,11 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} repmat (@var{A}, @var{m})
-## @deftypefnx {} {} repmat (@var{A}, @var{m}, @var{n})
-## @deftypefnx {} {} repmat (@var{A}, @var{m}, @var{n}, @var{p} @dots{})
-## @deftypefnx {} {} repmat (@var{A}, [@var{m} @var{n}])
-## @deftypefnx {} {} repmat (@var{A}, [@var{m} @var{n} @var{p} @dots{}])
+## @deftypefn  {} {@var{B} =} repmat (@var{A}, @var{m})
+## @deftypefnx {} {@var{B} =} repmat (@var{A}, @var{m}, @var{n})
+## @deftypefnx {} {@var{B} =} repmat (@var{A}, @var{m}, @var{n}, @var{p} @dots{})
+## @deftypefnx {} {@var{B} =} repmat (@var{A}, [@var{m} @var{n}])
+## @deftypefnx {} {@var{B} =} repmat (@var{A}, [@var{m} @var{n} @var{p} @dots{}])
 ## Repeat matrix or N-D array.
 ##
 ## Form a block matrix of size @var{m} by @var{n}, with a copy of matrix
@@ -42,7 +42,7 @@
 ## @seealso{bsxfun, kron, repelems}
 ## @end deftypefn
 
-function x = repmat (A, m, varargin)
+function B = repmat (A, m, varargin)
 
   if (nargin < 2)
     print_usage ();
@@ -107,21 +107,21 @@
   if (numel (A) == 1)
     ## optimize the scalar fill case.
     if (any (idx == 0))
-      x = resize (A, idx);
+      B = resize (A, idx);
     else
-      x(1:prod (idx)) = A;
-      x = reshape (x, idx);
+      B(1:prod (idx)) = A;
+      B = reshape (B, idx);
     endif
   elseif (ndims (A) == 2 && length (idx) < 3)
     if (issparse (A))
-      x = kron (ones (idx), A);
+      B = kron (ones (idx), A);
     else
       ## indexing is now faster, so we use it rather than kron.
       m = rows (A); n = columns (A);
       p = idx(1); q = idx(2);
-      x = reshape (A, m, 1, n, 1);
-      x = x(:, ones (1, p), :, ones (1, q));
-      x = reshape (x, m*p, n*q);
+      B = reshape (A, m, 1, n, 1);
+      B = B(:, ones (1, p), :, ones (1, q));
+      B = reshape (B, m*p, n*q);
     endif
   else
     aidx = size (A);
@@ -138,7 +138,7 @@
     ## add singleton dims
     aaidx(2,:) = 1;
     A = reshape (A, aaidx(:));
-    x = reshape (A (cidx{:}), idx .* aidx);
+    B = reshape (A (cidx{:}), idx .* aidx);
   endif
 
 endfunction
--- a/scripts/general/rng.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/general/rng.m	Mon Aug 29 13:58:00 2022 +0200
@@ -75,7 +75,7 @@
 ## @seealso{rand, randn}
 ## @end deftypefn
 
-function retval = rng (varargin)
+function s = rng (varargin)
 
   if (nargin > 2)
     print_usage ();
@@ -93,12 +93,12 @@
   ## Type is the generator name.
   ## Seed is the initial seed value.
   ## State is a structure describing internal state of the generator.
-  s = struct ("Type", "twister",
-              "Seed", "Not applicable",
-              "State", {{rand("state"), randn("state")}});
+  srng = struct ("Type", "twister",
+                 "Seed", "Not applicable",
+                 "State", {{rand("state"), randn("state")}});
 
   if (nargin == 0)
-    retval = s;
+    s = srng;
     return;
   endif
 
@@ -135,7 +135,7 @@
 
   ## Set the type of random number generator and seed it
   if (isempty (generator))
-    generator = s.Type;
+    generator = srng.Type;
   endif
   switch (generator)
     case "twister"
@@ -158,7 +158,7 @@
   endswitch
 
   if (nargout > 0)
-    retval = s;
+    s = srng;
   endif
 
 endfunction
--- a/scripts/general/rot90.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/general/rot90.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} rot90 (@var{A})
-## @deftypefnx {} {} rot90 (@var{A}, @var{k})
+## @deftypefn  {} {@var{B} =} rot90 (@var{A})
+## @deftypefnx {} {@var{B} =} rot90 (@var{A}, @var{k})
 ## Rotate array by 90 degree increments.
 ##
 ## Return a copy of @var{A} with the elements rotated counterclockwise in
--- a/scripts/general/rotdim.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/general/rotdim.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,10 +24,10 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} rotdim (@var{x})
-## @deftypefnx {} {} rotdim (@var{x}, @var{n})
-## @deftypefnx {} {} rotdim (@var{x}, @var{n}, @var{plane})
-## Return a copy of @var{x} with the elements rotated counterclockwise in
+## @deftypefn  {} {@var{B} =} rotdim (@var{A})
+## @deftypefnx {} {@var{B} =} rotdim (@var{A}, @var{n})
+## @deftypefnx {} {@var{B} =} rotdim (@var{A}, @var{n}, @var{plane})
+## Return a copy of @var{A} with the elements rotated counterclockwise in
 ## 90-degree increments.
 ##
 ## The second argument @var{n} is optional, and specifies how many 90-degree
@@ -63,7 +63,7 @@
 ## @seealso{rot90, fliplr, flipud, flip}
 ## @end deftypefn
 
-function y = rotdim (x, n, plane)
+function B = rotdim (A, n, plane)
 
   if (nargin < 1)
     print_usage ();
@@ -77,8 +77,8 @@
     n = 1;
   endif
 
-  nd = ndims (x);
-  sz = size (x);
+  nd = ndims (A);
+  sz = size (A);
   if (nargin < 3)
     if (nd > 2)
       ## Find the first two non-singleton dimension.
@@ -105,7 +105,7 @@
     if (! (isvector (plane) && length (plane) == 2
            && all (plane == fix (plane)) && all (plane > 0)
            && all (plane < (nd + 1)) && plane(1) != plane(2)))
-      error ("rotdim: PLANE must be a 2 element integer vector defining a valid PLANE");
+      error ("rotdim: PLANE must be a 2-element integer vector defining a valid plane");
     endif
   endif
 
@@ -114,21 +114,19 @@
     n += 4;
   endif
   if (n == 0)
-    y = x;
+    B = A;
   elseif (n == 2)
-    y = flip (flip (x, plane(1)), plane(2));
+    B = flip (flip (A, plane(1)), plane(2));
   elseif (n == 1 || n == 3)
     perm = 1:nd;
     perm(plane(1)) = plane(2);
     perm(plane(2)) = plane(1);
-    y = permute (x, perm);
+    B = permute (A, perm);
     if (n == 1)
-      y = flip (y, min (plane));
+      B = flip (B, min (plane));
     else
-      y = flip (y, max (plane));
+      B = flip (B, max (plane));
     endif
-  else
-    error ("rotdim: internal error!");
   endif
 
 endfunction
--- a/scripts/general/shift.m	Sun Aug 28 22:44:49 2022 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,101 +0,0 @@
-########################################################################
-##
-## Copyright (C) 1995-2022 The Octave Project Developers
-##
-## See the file COPYRIGHT.md in the top-level directory of this
-## distribution or <https://octave.org/copyright/>.
-##
-## This file is part of Octave.
-##
-## Octave is free software: you can redistribute it and/or modify it
-## under the terms of the GNU General Public License as published by
-## the Free Software Foundation, either version 3 of the License, or
-## (at your option) any later version.
-##
-## Octave is distributed in the hope that it will be useful, but
-## WITHOUT ANY WARRANTY; without even the implied warranty of
-## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-## GNU General Public License for more details.
-##
-## You should have received a copy of the GNU General Public License
-## along with Octave; see the file COPYING.  If not, see
-## <https://www.gnu.org/licenses/>.
-##
-########################################################################
-
-## -*- texinfo -*-
-## @deftypefn  {} {} shift (@var{x}, @var{b})
-## @deftypefnx {} {} shift (@var{x}, @var{b}, @var{dim})
-## If @var{x} is a vector, perform a circular shift of length @var{b} of
-## the elements of @var{x}.
-##
-## If @var{x} is a matrix, do the same for each column of @var{x}.
-##
-## If the optional @var{dim} argument is given, operate along this dimension.
-## @end deftypefn
-
-function y = shift (x, b, dim)
-
-  if (nargin < 2)
-    print_usage ();
-  endif
-
-  if (numel (x) < 1)
-    error ("shift: X must not be empty");
-  elseif (! (isscalar (b) && b == fix (b)))
-    error ("shift: B must be an integer");
-  endif
-
-  nd = ndims (x);
-  sz = size (x);
-
-  if (nargin == 3)
-    if (!(isscalar (dim) && dim == fix (dim))
-        || !(1 <= dim && dim <= nd))
-      error ("shift: DIM must be an integer and a valid dimension");
-    endif
-  else
-    ## Find the first non-singleton dimension.
-    (dim = find (sz > 1, 1)) || (dim = 1);
-  endif
-
-  d = sz(dim);
-
-  idx = repmat ({':'}, nd, 1);
-  if (b > 0)
-    b = rem (b, d);
-    idx{dim} = [d-b+1:d, 1:d-b];
-  elseif (b < 0)
-    b = rem (abs (b), d);
-    idx{dim} = [b+1:d, 1:b];
-  endif
-
-  y = x(idx{:});
-
-endfunction
-
-
-%!test
-%! a = [1, 2, 3];
-%! b = [4, 5, 6];
-%! c = [7, 8, 9];
-%!
-%! r = [a, b, c];
-%! m = [a; b; c];
-%!
-%! assert (shift (r, 0), r);
-%! assert (shift (r, 3), [c, a, b]);
-%! assert (shift (r, -6), [c, a, b]);
-%! assert (shift (r, -3), [b, c, a]);
-%! assert (shift (m, 1), [c; a; b]);
-%! assert (shift (m, -2), [c; a; b]);
-
-## Test input validation
-%!error <Invalid call> shift ()
-%!error <Invalid call> shift (1)
-%!error <X must not be empty> shift ([], 1)
-%!error <B must be an integer> shift (ones (2), ones (2))
-%!error <B must be an integer> shift (ones (2), 1.5)
-%!error <DIM must be an integer> shift (1, 1, 1.5)
-%!error <DIM must be .* a valid dimension> shift (1, 1, 0)
-%!error <DIM must be .* a valid dimension> shift (1, 1, 3)
--- a/scripts/general/structfun.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/general/structfun.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,16 +24,16 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} structfun (@var{func}, @var{S})
-## @deftypefnx {} {[@var{A}, @dots{}] =} structfun (@dots{})
-## @deftypefnx {} {} structfun (@dots{}, "ErrorHandler", @var{errfunc})
-## @deftypefnx {} {} structfun (@dots{}, "UniformOutput", @var{val})
+## @deftypefn  {} {@var{A} =} structfun (@var{fcn}, @var{S})
+## @deftypefnx {} {@var{A} =} structfun (@dots{}, "ErrorHandler", @var{errfcn})
+## @deftypefnx {} {@var{A} =} structfun (@dots{}, "UniformOutput", @var{val})
+## @deftypefnx {} {[@var{A}, @var{B}, @dots{}] =} structfun (@dots{})
 ##
 ## Evaluate the function named @var{name} on the fields of the structure
-## @var{S}.  The fields of @var{S} are passed to the function @var{func}
+## @var{S}.  The fields of @var{S} are passed to the function @var{fcn}
 ## individually.
 ##
-## @code{structfun} accepts an arbitrary function @var{func} in the form of an
+## @code{structfun} accepts an arbitrary function @var{fcn} in the form of an
 ## inline function, function handle, or the name of a function (in a character
 ## string).  In the case of a character string argument, the function must
 ## accept a single argument named @var{x}, and it must return a string value.
@@ -57,16 +57,16 @@
 ## @end group
 ## @end example
 ##
-## Given the parameter @qcode{"ErrorHandler"}, @var{errfunc} defines a function
-## to call in case @var{func} generates an error.  The form of the function is
+## Given the parameter @qcode{"ErrorHandler"}, @var{errfcn} defines a function
+## to call in case @var{fcn} generates an error.  The form of the function is
 ##
 ## @example
-## function [@dots{}] = errfunc (@var{se}, @dots{})
+## function [@dots{}] = errfcn (@var{se}, @dots{})
 ## @end example
 ##
 ## @noindent
-## where there is an additional input argument to @var{errfunc} relative to
-## @var{func}, given by @nospell{@var{se}}.  This is a structure with the
+## where there is an additional input argument to @var{errfcn} relative to
+## @var{fcn}, given by @nospell{@var{se}}.  This is a structure with the
 ## elements @qcode{"identifier"}, @qcode{"message"} and @qcode{"index"},
 ## giving respectively the error identifier, the error message, and the index
 ## into the input arguments of the element that caused the error.  For an
@@ -75,7 +75,7 @@
 ## @seealso{cellfun, arrayfun, spfun}
 ## @end deftypefn
 
-function varargout = structfun (func, S, varargin)
+function varargout = structfun (fcn, S, varargin)
 
   if (nargin < 2)
     print_usage ();
@@ -105,7 +105,7 @@
   endif
 
   varargout = cell (max ([nargout, 1]), 1);
-  [varargout{:}] = cellfun (func, struct2cell (S), varargin{:});
+  [varargout{:}] = cellfun (fcn, struct2cell (S), varargin{:});
 
   if (! uniform_output)
     varargout = cellfun ("cell2struct", varargout, {fieldnames(S)}, {1}, ...
--- a/scripts/general/triplequad.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/general/triplequad.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,10 +24,10 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} triplequad (@var{f}, @var{xa}, @var{xb}, @var{ya}, @var{yb}, @var{za}, @var{zb})
-## @deftypefnx {} {} triplequad (@var{f}, @var{xa}, @var{xb}, @var{ya}, @var{yb}, @var{za}, @var{zb}, @var{tol})
-## @deftypefnx {} {} triplequad (@var{f}, @var{xa}, @var{xb}, @var{ya}, @var{yb}, @var{za}, @var{zb}, @var{tol}, @var{quadf})
-## @deftypefnx {} {} triplequad (@var{f}, @var{xa}, @var{xb}, @var{ya}, @var{yb}, @var{za}, @var{zb}, @var{tol}, @var{quadf}, @dots{})
+## @deftypefn  {} {@var{q} =} triplequad (@var{f}, @var{xa}, @var{xb}, @var{ya}, @var{yb}, @var{za}, @var{zb})
+## @deftypefnx {} {@var{q} =} triplequad (@var{f}, @var{xa}, @var{xb}, @var{ya}, @var{yb}, @var{za}, @var{zb}, @var{tol})
+## @deftypefnx {} {@var{q} =} triplequad (@var{f}, @var{xa}, @var{xb}, @var{ya}, @var{yb}, @var{za}, @var{zb}, @var{tol}, @var{quadf})
+## @deftypefnx {} {@var{q} =} triplequad (@var{f}, @var{xa}, @var{xb}, @var{ya}, @var{yb}, @var{za}, @var{zb}, @var{tol}, @var{quadf}, @dots{})
 ## Numerically evaluate the triple integral of @var{f}.
 ##
 ## @var{f} is a function handle, inline function, or string containing the name
--- a/scripts/gui/module.mk	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/gui/module.mk	Mon Aug 29 13:58:00 2022 +0200
@@ -36,6 +36,7 @@
   %reldir%/uicontrol.m \
   %reldir%/uigetdir.m \
   %reldir%/uigetfile.m \
+  %reldir%/uifigure.m \
   %reldir%/uimenu.m \
   %reldir%/uipanel.m \
   %reldir%/uipushtool.m \
--- a/scripts/gui/private/__is_function__.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/gui/private/__is_function__.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,13 +24,14 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {@var{result} =} __is_function__ (@var{func})
-## Undocumented internal function.
+## @deftypefn {} {@var{tf} =} __is_function__ (@var{fcn})
+## Return true if @var{fcn} is an m-file function, @file{.oct} or @file{.mex}
+## function, or a built-in function.
 ## @end deftypefn
 
-function result = __is_function__ (func)
+function tf = __is_function__ (fcn)
 
-  existval = exist (func);
-  result = (existval == 2 || existval == 3 || existval == 5);
+  existval = exist (fcn);
+  tf = (existval == 2 || existval == 3 || existval == 5);
 
 endfunction
--- a/scripts/gui/uibuttongroup.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/gui/uibuttongroup.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,12 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {@var{hui} =} uibuttongroup (@var{property}, @var{value}, @dots{})
+## @deftypefn  {} {@var{hui} =} uibuttongroup ()
+## @deftypefnx {} {@var{hui} =} uibuttongroup (@var{property}, @var{value}, @dots{})
+## @deftypefnx {} {@var{hui} =} uibuttongroup (@var{parent})
 ## @deftypefnx {} {@var{hui} =} uibuttongroup (@var{parent}, @var{property}, @var{value}, @dots{})
+## @c FIXME: 3rd form is not documented by Matlab nor implemented in Octave.
+## @c        Should it be removed?  (1/9/2022).
 ## @deftypefnx {} {} uibuttongroup (@var{h})
 ##
 ## Create a uibuttongroup object and return a handle to it.
--- a/scripts/gui/uicontrol.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/gui/uicontrol.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,9 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {@var{hui} =} uicontrol (@var{property}, @var{value}, @dots{})
+## @deftypefn  {} {@var{hui} =} uicontrol ()
+## @deftypefnx {} {@var{hui} =} uicontrol (@var{property}, @var{value}, @dots{})
+## @deftypefnx {} {@var{hui} =} uicontrol (@var{parent})
 ## @deftypefnx {} {@var{hui} =} uicontrol (@var{parent}, @var{property}, @var{value}, @dots{})
 ## @deftypefnx {} {} uicontrol (@var{h})
 ##
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/scripts/gui/uifigure.m	Mon Aug 29 13:58:00 2022 +0200
@@ -0,0 +1,79 @@
+########################################################################
+##
+## Copyright (C) 2022 The Octave Project Developers
+##
+## See the file COPYRIGHT.md in the top-level directory of this
+## distribution or <https://octave.org/copyright/>.
+##
+## This file is part of Octave.
+##
+## Octave is free software: you can redistribute it and/or modify it
+## under the terms of the GNU General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## Octave is distributed in the hope that it will be useful, but
+## WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with Octave; see the file COPYING.  If not, see
+## <https://www.gnu.org/licenses/>.
+##
+########################################################################
+
+## -*- texinfo -*-
+## @deftypefn  {} {@var{h} =} uifigure ()
+## @deftypefnx {} {@var{h} =} uifigure ("@var{property}", @var{value}, @dots{})
+## Create a new figure window for applications.
+##
+## Multiple property-value pairs may be specified for the figure object, but
+## they must occur in pairs.
+##
+## The return value @var{h} is a graphics handle to the created figure object.
+##
+## Programming Note: The full list of properties is documented at
+## @ref{Figure Properties}.  This function differs from @code{figure} in that
+## the created figure is optimized for application development, rather than
+## plotting.  This means features such as menubars and toolbars are turned off.
+## @seealso{uipanel, uibuttongroup}
+## @end deftypefn
+
+## FIXME: This is not a perfect replica of a Matlab uifigure object because
+## some ordinary figure object properties are exposed (e.g., the "PaperXXX"
+## properties).  In addition, the following properties are missing:
+## "AutoResizeChildren", "Icon", "Scrollable".
+
+function h = uifigure (varargin)
+
+  if (mod (nargin, 2) != 0)
+    error ("uifigure: PROPERTY/VALUE parameters must occur in pairs");
+  endif
+
+  h = __go_figure__ (NaN, "handlevisibility", "off",
+                          "numbertitle", "off", "integerhandle", "off",
+                          "menubar", "none", "toolbar", "none");
+
+  ## Add uifigure-specific properties on top of regular figure graphics object
+  ## FIXME: There is no implementation behind these properties.
+  addproperty ("AutoResizeChildren", h, "boolean", "on");
+  addproperty ("Scrollable", h, "boolean", "off");
+
+  ## Apply any overrides.
+  set (h, varargin{:});
+
+endfunction
+
+
+%!test
+%! hf = uifigure ("visible", "off");
+%! unwind_protect
+%!   assert (isfigure (hf));
+%!   assert (get (hf, {"numbertitle", "menubar", "scrollable"}),
+%!                    {"off", "none", "off"});
+%! unwind_protect_cleanup
+%!   close (hf);
+%! end_unwind_protect
+
+%!error <parameters must occur in pairs> uifigure ("PROP1")
--- a/scripts/gui/uigetfile.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/gui/uigetfile.m	Mon Aug 29 13:58:00 2022 +0200
@@ -41,7 +41,7 @@
 ## If a filename is given then the file extension is extracted and used as
 ## filter.  In addition, the path is selected as current path in the dialog and
 ## the filename is selected as default file.
-## Example: @code{uigetfile ("myfun.m")}
+## Example: @code{uigetfile ("myfcn.m")}
 ##
 ## @item A single file extension @qcode{"*.ext"}
 ## Example: @code{uigetfile ("*.ext")}
--- a/scripts/gui/uimenu.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/gui/uimenu.m	Mon Aug 29 13:58:00 2022 +0200
@@ -35,37 +35,39 @@
 ##
 ## @table @asis
 ## @item @qcode{"accelerator"}
-## A string containing the key combination together with CTRL to execute this
+## A string containing the key, together with CTRL, to execute this
 ## menu entry (e.g., @qcode{"x"} for CTRL+x).
 ##
-## @item @qcode{"callback"}
-## Is the function called when this menu entry is executed.  It can be either a
-## function string (e.g., @qcode{"myfun"}), a function handle (e.g., @@myfun)
-## or a cell array containing the function handle and arguments for the
-## callback function (e.g., @{@@myfun, arg1, arg2@}).
-##
 ## @item @qcode{"checked"}
 ## Can be set @qcode{"on"} or @qcode{"off"}.  Sets a mark at this menu entry.
 ##
 ## @item @qcode{"enable"}
-## Can be set @qcode{"on"} or @qcode{"off"}.  If disabled the menu entry
-## cannot be selected and it is grayed out.
+## Can be set @qcode{"on"} or @qcode{"off"}.  If disabled then the menu entry
+## cannot be selected and is grayed out.
 ##
 ## @item @qcode{"foregroundcolor"}
-## A color value setting the text color for this menu entry.
+## A color value for the text of the menu entry.
 ##
-## @item @qcode{"label"}
-## A string containing the label for this menu entry.  A @qcode{"&"}-symbol
-## can be used to mark the @qcode{"accelerator"} character (e.g.,
-## @nospell{@qcode{"E&xit"}})
+## @item @qcode{"menuselectedfcn"}
+## The function called when this menu entry is executed.  It can be either a
+## function string (e.g., @qcode{"myfcn"}), a function handle (e.g., @@myfcn)
+## or a cell array containing the function handle and arguments for the
+## callback function (e.g., @{@@myfcn, arg1, arg2@}).
 ##
 ## @item @qcode{"position"}
-## An scalar value containing the relative menu position.  The entry with the
-## lowest value is at the first position starting from left or top.
+## A scalar value containing the relative menu position.  The first position
+## has value 1 and will be either the left or top depending on the orientation
+## of the uimenu.
 ##
 ## @item @qcode{"separator"}
-## Can be set @qcode{"on"} or @qcode{"off"}.  If enabled it draws a separator
-## line above the current position.  It is ignored for top level entries.
+## Can be set @qcode{"on"} or @qcode{"off"}.  If enabled, a separator
+## line is drawn above the current position.  This property is ignored for
+## top-level entries.
+##
+## @item @qcode{"text"}
+## A string containing the text for this menu entry.  A @qcode{"&"}-symbol
+## can be used to mark the @qcode{"accelerator"} character (e.g.,
+## @nospell{@qcode{"E&xit"}}).
 ##
 ## @end table
 ##
@@ -75,12 +77,12 @@
 ##
 ## @example
 ## @group
-## f = uimenu ("label", "&File", "accelerator", "f");
-## e = uimenu ("label", "&Edit", "accelerator", "e");
-## uimenu (f, "label", "Close", "accelerator", "q", ...
-##            "callback", "close (gcf)");
-## uimenu (e, "label", "Toggle &Grid", "accelerator", "g", ...
-##            "callback", "grid (gca)");
+## f = uimenu ("text", "&File", "accelerator", "f");
+## e = uimenu ("text", "&Edit", "accelerator", "e");
+## uimenu (f, "text", "Close", "accelerator", "q", ...
+##            "menuselectedfcn", "close (gcf)");
+## uimenu (e, "text", "Toggle &Grid", "accelerator", "g", ...
+##            "menuselectedfcn", "grid (gca)");
 ## @end group
 ## @end example
 ## @seealso{figure}
@@ -91,10 +93,10 @@
   [h, args] = __uiobject_split_args__ ("uimenu", varargin,
                                        {"figure", "uicontextmenu", "uimenu"});
 
-  tmp = __go_uimenu__ (h, args{:});
+  htmp = __go_uimenu__ (h, args{:});
 
   if (nargout > 0)
-    hui = tmp;
+    hui = htmp;
   endif
 
 endfunction
@@ -105,18 +107,20 @@
 %! surfl (peaks);
 %! colormap (copper (64));
 %! shading ('interp');
-%! f = uimenu ('label', '&File', 'accelerator', 'f');
-%! e = uimenu ('label', '&Edit', 'accelerator', 'e');
-%! uimenu (f, 'label', 'Close', 'accelerator', 'q', 'callback', 'close (gcf)');
-%! uimenu (e, 'label', 'Toggle &Grid', 'accelerator', 'g', 'callback', 'grid (gca)');
+%! f = uimenu ('text', '&File', 'accelerator', 'f');
+%! e = uimenu ('text', '&Edit', 'accelerator', 'e');
+%! uimenu (f, 'text', 'Close', 'accelerator', 'q', ...
+%!            'menuselectedfcn', 'close (gcf)');
+%! uimenu (e, 'text', 'Toggle &Grid', 'accelerator', 'g', ...
+%!            'menuselectedfcn', 'grid (gca)');
 
 %!testif HAVE_OPENGL, HAVE_QT; have_window_system () && any (strcmp ("qt", available_graphics_toolkits ()))
 %! toolkit = graphics_toolkit ("qt");
 %! hf = figure ("visible", "off");
 %! unwind_protect
-%!   ui = uimenu ("label", "mylabel");
+%!   ui = uimenu ("text", "mytext");
 %!   assert (findobj (hf, "type", "uimenu"), ui);
-%!   assert (get (ui, "label"), "mylabel");
+%!   assert (get (ui, "text"), "mytext");
 %!   assert (get (ui, "checked"), "off");
 %!   assert (get (ui, "separator"), "off");
 %!   assert (get (ui, "enable"), "on");
@@ -131,9 +135,9 @@
 %! toolkit = graphics_toolkit ("qt");
 %! hf = figure ("visible", "off");
 %! unwind_protect
-%!   uif = findall (hf, "label", "&file");
+%!   uif = findall (hf, "text", "&file");
 %!   assert (ishghandle (uif));
-%!   uie = findall (hf, "label", "&edit");
+%!   uie = findall (hf, "text", "&edit");
 %!   assert (ishghandle (uie));
 %! unwind_protect_cleanup
 %!   close (hf);
@@ -144,8 +148,8 @@
 %! toolkit = graphics_toolkit ("qt");
 %! hf = figure ("visible", "off");
 %! unwind_protect
-%!   uie = findall (hf, "label", "&edit");
-%!   myui = uimenu (uie, "label", "mylabel");
+%!   uie = findall (hf, "text", "&edit");
+%!   myui = uimenu (uie, "text", "mytext");
 %!   assert (ancestor (myui, "uimenu", "toplevel"), uie);
 %! unwind_protect_cleanup
 %!   close (hf);
--- a/scripts/gui/uipanel.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/gui/uipanel.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,9 +24,10 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} uipanel (@var{property}, @var{value}, @dots{})
-## @deftypefnx {} {} uipanel (@var{parent}, @var{property}, @var{value}, @dots{})
-## @deftypefnx {} {@var{hui} =} uipanel (@dots{})
+## @deftypefn  {} {@var{hui} =} uipanel ()
+## @deftypefnx {} {@var{hui} =} uipanel (@var{property}, @var{value}, @dots{})
+## @deftypefnx {} {@var{hui} =} uipanel (@var{parent})
+## @deftypefnx {} {@var{hui} =} uipanel (@var{parent}, @var{property}, @var{value}, @dots{})
 ##
 ## Create a uipanel object.
 ##
--- a/scripts/gui/uipushtool.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/gui/uipushtool.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,9 +24,10 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} uipushtool (@var{property}, @var{value}, @dots{})
+## @deftypefn  {} {} uipushtool ()
+## @deftypefnx {} {} uipushtool (@var{property}, @var{value}, @dots{})
+## @deftypefnx {} {} uipushtool (@var{parent})
 ## @deftypefnx {} {} uipushtool (@var{parent}, @var{property}, @var{value}, @dots{})
-## @deftypefnx {} {@var{hui} =} uipushtool (@dots{})
 ##
 ## Create a uipushtool object.
 ##
--- a/scripts/gui/uiputfile.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/gui/uiputfile.m	Mon Aug 29 13:58:00 2022 +0200
@@ -37,7 +37,7 @@
 ## @item @qcode{"/path/to/filename.ext"}
 ## If a filename is given the file extension is extracted and used as filter.
 ## In addition the path is selected as current path in the dialog and the
-## filename is selected as default file.  Example: @code{uiputfile ("myfun.m")}
+## filename is selected as default file.  Example: @code{uiputfile ("myfcn.m")}
 ##
 ## @item @qcode{"*.ext"}
 ## A single file extension.
--- a/scripts/gui/uitoggletool.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/gui/uitoggletool.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,9 +24,10 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} uitoggletool (@var{property}, @var{value}, @dots{})
-## @deftypefnx {} {} uitoggletool (@var{parent}, @var{property}, @var{value}, @dots{})
-## @deftypefnx {} {@var{hui} =} uitoggletool (@dots{})
+## @deftypefn  {} {@var{hui} =} uitoggletool ()
+## @deftypefnx {} {@var{hui} =} uitoggletool (@var{property}, @var{value}, @dots{})
+## @deftypefnx {} {@var{hui} =} uitoggletool (@var{parent})
+## @deftypefnx {} {@var{hui} =} uitoggletool (@var{parent}, @var{property}, @var{value}, @dots{})
 ##
 ## Create a uitoggletool object.
 ##
--- a/scripts/gui/uitoolbar.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/gui/uitoolbar.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,9 +24,10 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} uitoolbar (@var{property}, @var{value}, @dots{})
-## @deftypefnx {} {} uitoolbar (@var{parent}, @var{property}, @var{value}, @dots{})
-## @deftypefnx {} {@var{hui} =} uitoolbar (@dots{})
+## @deftypefn  {} {@var{hui} =} uitoolbar ()
+## @deftypefnx {} {@var{hui} =} uitoolbar (@var{property}, @var{value}, @dots{})
+## @deftypefnx {} {@var{hui} =} uitoolbar (@var{parent})
+## @deftypefnx {} {@var{hui} =} uitoolbar (@var{parent}, @var{property}, @var{value}, @dots{})
 ##
 ## Create a uitoolbar object.  A uitoolbar displays uitoggletool and uipushtool
 ## buttons.
--- a/scripts/gui/waitforbuttonpress.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/gui/waitforbuttonpress.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} waitforbuttonpress ()
-## @deftypefnx {} {@var{b} =} waitforbuttonpress ()
+## @deftypefn {} {@var{b} =} waitforbuttonpress ()
 ## Wait for mouse click or key press over the current figure window.
 ##
 ## The return value of @var{b} is 0 if a mouse button was pressed or 1 if a
--- a/scripts/help/__makeinfo__.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/help/__makeinfo__.m	Mon Aug 29 13:58:00 2022 +0200
@@ -101,7 +101,12 @@
   endif
   ## Texinfo crashes if @end tex does not appear first on the line.
   text = regexprep (text, '^ +@end tex', '@end tex', 'lineanchors');
-  text = regexprep (text, '@seealso', '@xseealso');
+  ## Replace @seealso with Octave specific @xseealso macro, and escape '@'
+  [s, e] = regexp (text, '@seealso{.*}');
+  if (! isempty (s))
+    esc_text = strrep (text(s+8:e), '@', '@@');
+    text = [text(1:s), 'xseealso', esc_text, text(e+1:end)];
+  endif
 
   ## We don't want *ref macros to clutter plain text output with "Note ..."
   if (strcmp (output_type, "plain text"))
--- a/scripts/help/doc_cache_create.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/help/doc_cache_create.m	Mon Aug 29 13:58:00 2022 +0200
@@ -147,8 +147,8 @@
   endif
 
   ## create cache
-  func = @(s_) create_cache (__list_functions__ (s_));
-  cache = cellfun (func, directory, "UniformOutput", false);
+  f_lsfcn = @(dir) create_cache (__list_functions__ (dir));
+  cache = cellfun (f_lsfcn, directory, "UniformOutput", false);
 
   ## concatenate results
   cache = [cache{:}];
--- a/scripts/help/help.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/help/help.m	Mon Aug 29 13:58:00 2022 +0200
@@ -28,6 +28,7 @@
 ## @deftypefnx {} {} help --list
 ## @deftypefnx {} {} help .
 ## @deftypefnx {} {} help
+## @deftypefnx {} {@var{help_text} =} help (@dots{})
 ## Display the help text for @var{name}.
 ##
 ## For example, the command @kbd{help help} prints a short message describing
--- a/scripts/help/private/__additional_help_message__.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/help/private/__additional_help_message__.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} __additional_help_message__ ()
+## @deftypefn {} {@var{msg} =} __additional_help_message__ ()
 ## Undocumented internal function.
 ## @end deftypefn
 
--- a/scripts/help/warning_ids.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/help/warning_ids.m	Mon Aug 29 13:58:00 2022 +0200
@@ -178,6 +178,13 @@
 ## different file target than the programmer intended is being used.
 ## By default, the @code{Octave:data-file-in-path} warning is enabled.
 ##
+## @item Octave:datevec:date-format-spec
+## If the @code{Octave:datevec:date-format-spec} warning is enabled, a warning
+## is printed if the date format specification contains questionable date or
+## time specifiers.  Typical bad patterns are using upper case date specifiers
+## or lower case time specifiers.
+## By default, the @code{Octave:datevec:date-format-spec} warning is enabled.
+##
 ## @item Octave:deprecated-function
 ## If the @code{Octave:deprecated-function} warning is enabled, a
 ## warning is issued when Octave encounters a function that is obsolete and
@@ -359,6 +366,11 @@
 ## By default, the @code{Octave:possible-matlab-short-circuit-operator} warning
 ## is enabled.
 ##
+## @item Octave:pow2:imaginary-ignored
+## If the @code{Octave:pow2:imaginary-ignored} warning is enabled, a warning is
+## printed if either input to @code{pow2} is complex.
+## By default, the @code{Octave:pow2:imaginary-ignored} warning is enabled.
+##
 ## @item Octave:recursive-path-search
 ## If the @code{Octave:recursive-path-search} warning is enabled, Octave
 ## will issue a warning if @code{addpath} is used with double trailing
--- a/scripts/image/hsv.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/image/hsv.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} hsv (@var{n})
+## @deftypefn  {} {@var{map} =} hsv ()
+## @deftypefnx {} {@var{map} =} hsv (@var{n})
 ## Create color colormap.  This colormap begins with red, changes through
 ## yellow, green, cyan, blue, and magenta, before returning to red.
 ##
--- a/scripts/image/im2double.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/image/im2double.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,20 +24,19 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} im2double (@var{img})
-## @deftypefnx {} {} im2double (@var{img}, "indexed")
+## @deftypefn  {} {@var{dimg} =} im2double (@var{img})
+## @deftypefnx {} {@var{dimg} =} im2double (@var{img}, "indexed")
 ## Convert image to double precision.
 ##
-## The conversion of @var{img} to double precision, is dependent
-## on the type of input image.  The following input classes are
-## supported:
+## The conversion of @var{img} to double precision, is dependent on the type of
+## input image.  The following input classes are supported:
 ##
 ## @table @samp
 ## @item uint8, uint16, and int16
 ## The range of values from the class is scaled to the interval [0 1].
 ##
 ## @item logical
-## True and false values are assigned a value of 0 and 1 respectively.
+## True and false values are assigned a value of 1 and 0 respectively.
 ##
 ## @item single
 ## Values are cast to double.
@@ -47,15 +46,15 @@
 ##
 ## @end table
 ##
-## If @var{img} is an indexed image, then the second argument should be
-## the string @qcode{"indexed"}.  If so, then @var{img} must either be
-## of floating point class, or unsigned integer class and it will simply
-## be cast to double.  If it is an integer class, a +1 offset is applied.
+## If @var{img} is an indexed image, then the second argument should be the
+## string @qcode{"indexed"}.  If so, then @var{img} must either be of floating
+## point class, or unsigned integer class and it will simply be cast to double.
+## If it is an integer class, an offset of +1 is applied.
 ##
 ## @seealso{double}
 ## @end deftypefn
 
-function img = im2double (img, im_type)
+function dimg = im2double (img, im_type)
 
   if (nargin < 1)
     print_usage ();
@@ -64,12 +63,12 @@
   if (nargin == 1)
     ## "normal" (non-indexed) images
     switch (class (img))
-      case "uint8",   img = double (img) / 255;
-      case "uint16",  img = double (img) / 65535;
-      case "int16",   img = (double (img) + 32768) / 65535;
-      case "single",  img = double (img);
-      case "logical", img = double (img);
-      case "double",  # do nothing
+      case "uint8",   dimg = double (img) / 255;
+      case "uint16",  dimg = double (img) / 65535;
+      case "int16",   dimg = (double (img) + 32768) / 65535;
+      case "single",  dimg = double (img);
+      case "logical", dimg = double (img);
+      case "double",  dimg = img;
       otherwise, error ('im2double: IMG is of unsupported class "%s"', class (img));
     endswitch
   else
@@ -77,9 +76,9 @@
     if (! strcmpi (im_type, "indexed"))
       error ('im2double: second input argument must be the string "indexed"');
     elseif (any (isa (img, {"uint8", "uint16"})))
-      img = double (img) + 1;
+      dimg = double (img) + 1;
     elseif (isfloat (img) || isbool (img))
-      img = double (img);
+      dimg = double (img);
     else
       ## Technically, it could also be of logical class and we do not
       ## enforce positive integers for floating for Matlab compatibility.
--- a/scripts/image/im2frame.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/image/im2frame.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} im2frame (@var{rgb})
-## @deftypefnx {} {} im2frame (@var{x}, @var{map})
+## @deftypefn  {} {@var{frame} =} im2frame (@var{rgb})
+## @deftypefnx {} {@var{frame} =} im2frame (@var{x}, @var{map})
 ## Convert image to movie frame.
 ##
 ## A movie frame is simply a struct with the fields @qcode{"cdata"} and
--- a/scripts/image/iscolormap.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/image/iscolormap.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} iscolormap (@var{cmap})
+## @deftypefn {} {@var{tf} =} iscolormap (@var{cmap})
 ## Return true if @var{cmap} is a colormap.
 ##
 ## A colormap is a real matrix, of class single or double, with 3 columns.
@@ -38,15 +38,14 @@
 ## @seealso{colormap, rgbplot}
 ## @end deftypefn
 
-function retval = iscolormap (cmap)
+function tf = iscolormap (cmap)
 
   if (nargin < 1)
     print_usage ();
   endif
 
-  retval = (isnumeric (cmap) && isreal (cmap)
-            && ndims (cmap) == 2 && columns (cmap) == 3
-            && isfloat (cmap));
+  tf = isnumeric (cmap) && isreal (cmap) && isfloat (cmap) ...
+       && ndims (cmap) == 2 && columns (cmap) == 3;
 
 endfunction
 
--- a/scripts/image/private/__imread__.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/image/private/__imread__.m	Mon Aug 29 13:58:00 2022 +0200
@@ -61,7 +61,7 @@
     if (sum (idx) > 1)
       error ("imread: Index or Frames may only be specified once");
     endif
-    val = varargin{shift (idx, 1)};
+    val = varargin{circshift (idx, 1)};
     if (! is_valid_index_option (val) && ! strcmpi (val, "all"))
       error ("imread: %s must be a vector or the string 'all'", varargin{idx});
     endif
--- a/scripts/image/private/colorspace_conversion_input_check.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/image/private/colorspace_conversion_input_check.m	Mon Aug 29 13:58:00 2022 +0200
@@ -29,7 +29,7 @@
 ## by the complementary private function colorspace_conversion_revert()
 
 function [in_arg, sz, is_im, is_nd] ...
-            = colorspace_conversion_input_check (func, arg_name, in_arg)
+            = colorspace_conversion_input_check (fcn, arg_name, in_arg)
 
   cls = class (in_arg);
   sz = size (in_arg);
@@ -38,11 +38,11 @@
   if (! iscolormap (in_arg))
     if (! any (strcmp (cls, {"uint8", "int8", "int16", "uint16", ...
                              "single", "double"})))
-      error ("%s: %s of invalid data type '%s'", func, arg_name, cls);
+      error ("%s: %s of invalid data type '%s'", fcn, arg_name, cls);
     elseif (size (in_arg, 3) != 3)
-      error ("%s: %s must be a colormap or %s image", func, arg_name, arg_name);
+      error ("%s: %s must be a colormap or %s image", fcn, arg_name, arg_name);
     elseif (! isreal (in_arg) || ! isnumeric (in_arg))
-      error ("%s: %s must be numeric and real", func, arg_name);
+      error ("%s: %s must be numeric and real", fcn, arg_name);
     endif
     is_im = true;
 
@@ -60,7 +60,7 @@
       is_nd = true;
       in_arg = permute (in_arg, [1 2 4 3]);
     elseif (nd > 4)
-      error ("%s: invalid %s with more than 4 dimensions", func, arg_name);
+      error ("%s: invalid %s with more than 4 dimensions", fcn, arg_name);
     endif
     in_arg = reshape (in_arg, [numel(in_arg)/3 3]);
   else
--- a/scripts/image/private/imageIO.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/image/private/imageIO.m	Mon Aug 29 13:58:00 2022 +0200
@@ -35,8 +35,8 @@
 ##
 ## Usage:
 ##
-## func      - Function name to use on error message.
-## core_func - Function handle for the default function to use if we can't
+## fcn       - Function name to use on error message.
+## core_fcn  - Function handle for the default function to use if we can't
 ##             find the format in imformats.
 ## fieldname - Name of the field in the struct returned by imformats that
 ##             has the function to use.
@@ -46,7 +46,7 @@
 ## varargin  - Followed by all the OTHER arguments passed to imread and
 ##             imfinfo.
 
-function varargout = imageIO (func, core_func, fieldname, filename, varargin)
+function varargout = imageIO (fcn, core_fcn, fieldname, filename, varargin)
 
   ## First thing: figure out the filename and possibly download it.
   ## The first attempt is to try the filename and see if it exists.  If it
@@ -77,7 +77,7 @@
   endif
 
   if (isempty (fn))
-    error ([func ": unable to find file '" filename "'"]);
+    error ([fcn ": unable to find file '" filename "'"]);
   endif
 
   ## unwind_protect block because we may have a file to remove in the end
@@ -89,7 +89,7 @@
     ## try to guess the format from the file extension.  Finally, if
     ## we still don't know the format, we use the Octave core functions
     ## which is the same for all formats.
-    foo = []; # the function we will use
+    hfcn = []; # the function we will use
 
     ## We check if the call to imformats (ext) worked using
     ## "numfields (fmt) > 0 because when it fails, the returned
@@ -99,13 +99,13 @@
     if (! isempty (varargin) && ischar (varargin{1}))
       fmt = imformats (varargin{1});
       if (numfields (fmt) > 0)
-        foo = fmt.(fieldname);
+        hfcn = fmt.(fieldname);
         varargin(1) = []; # remove format name from arguments
       endif
     endif
 
     ## try extension from filename
-    if (isempty (foo))
+    if (isempty (hfcn))
       [~, ~, ext] = fileparts (fn);
       if (! isempty (ext))
         ## remove dot from extension
@@ -113,16 +113,16 @@
       endif
       fmt = imformats (ext);
       if (numfields (fmt) > 0)
-        foo = fmt.(fieldname);
+        hfcn = fmt.(fieldname);
       endif
     endif
 
     ## use the core function
-    if (isempty (foo))
-      foo = core_func;
+    if (isempty (hfcn))
+      hfcn = core_fcn;
     endif
 
-    [varargout{1:nargout}] = foo (fn, varargin{:});
+    [varargout{1:nargout}] = hfcn (fn, varargin{:});
 
   unwind_protect_cleanup
     if (file_2_delete)
--- a/scripts/image/spinmap.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/image/spinmap.m	Mon Aug 29 13:58:00 2022 +0200
@@ -56,7 +56,7 @@
 
   t0 = clock ();
   while (etime (clock (), t0) < t)
-    cmap = shift (cmap, inc, 1);
+    cmap = circshift (cmap, inc, 1);
     set (gcf (), "colormap", cmap);
     drawnow ();
   endwhile
--- a/scripts/io/is_valid_file_id.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/io/is_valid_file_id.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,23 +24,23 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} is_valid_file_id (@var{fid})
+## @deftypefn {} {@var{tf} =} is_valid_file_id (@var{fid})
 ## Return true if @var{fid} refers to an open file.
 ## @seealso{freport, fopen}
 ## @end deftypefn
 
-function retval = is_valid_file_id (fid)
+function tf = is_valid_file_id (fid)
 
   if (nargin < 1)
     print_usage ();
   endif
 
-  retval = false;
+  tf = false;
 
   try
     if (isscalar (fid))
       [file, mode, arch] = fopen (fid);
-      retval = ! isempty (file);
+      tf = ! isempty (file);
     endif
   end_try_catch
 
--- a/scripts/java/javachk.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/java/javachk.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,9 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} javachk (@var{feature})
-## @deftypefnx {} {} javachk (@var{feature}, @var{caller})
-## @deftypefnx {} {@var{msg} =} javachk (@dots{})
+## @deftypefn  {} {@var{msg} =} javachk (@var{feature})
+## @deftypefnx {} {@var{msg} =} javachk (@var{feature}, @var{caller})
 ## Check for the presence of the Java @var{feature} in the current session.
 ## Return an error structure if @var{feature} is not available, not enabled,
 ## or not recognized.
--- a/scripts/java/usejava.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/java/usejava.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} usejava (@var{feature})
+## @deftypefn {} {@var{tf} =} usejava (@var{feature})
 ## Return true if the Java element @var{feature} is available.
 ##
 ## Possible features are:
@@ -52,32 +52,32 @@
 ## @seealso{javachk}
 ## @end deftypefn
 
-function retval = usejava (feature)
+function tf = usejava (feature)
 
   if (nargin < 1 || ! ischar (feature))
     print_usage ();
   endif
 
-  retval = false;
+  tf = false;
 
   switch (feature)
     ## For each feature, try methods() on a Java class of a feature
     case "awt"
       try
         dum = methods ("java.awt.Frame");
-        retval = ! javaMethod ("isHeadless", "java.awt.GraphicsEnvironment");
+        tf = ! javaMethod ("isHeadless", "java.awt.GraphicsEnvironment");
       end_try_catch
     case "desktop"
-      ## Octave has no Java based GUI/desktop, leave retval = false
+      ## Octave has no Java based GUI/desktop, leave tf = false
     case "jvm"
       try
         dum = methods ("java.lang.Runtime");
-        retval = true;
+        tf = true;
       end_try_catch
     case "swing"
       try
         dum = methods ("javax.swing.Popup");
-        retval = ! javaMethod ("isHeadless", "java.awt.GraphicsEnvironment");
+        tf = ! javaMethod ("isHeadless", "java.awt.GraphicsEnvironment");
       end_try_catch
     otherwise
       error ("usejava: unrecognized FEATURE '%s'", feature);
--- a/scripts/legacy/@inline/argnames.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/legacy/@inline/argnames.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,18 +24,17 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} argnames (@var{fun})
+## @deftypefn {} {@var{args} =} argnames (@var{fobj})
 ## Return a cell array of character strings containing the names of the
-## arguments of the inline function @var{fun}.
-## @seealso{inline, formula, vectorize}
+## arguments of the inline function object @var{fobj}.
+##
+## Programming Note: @code{symvar (@var{fobj})} is equivalent to
+## @code{argnames (@var{fobj})}.
+## @seealso{symvar, formula, vectorize, inline}
 ## @end deftypefn
 
-function args = argnames (obj)
+function args = argnames (fobj)
 
-  if (nargin < 1)
-    print_usage ();
-  endif
-
-  args = obj.args;
+  args = fobj.args;
 
 endfunction
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/scripts/legacy/@inline/cat.m	Mon Aug 29 13:58:00 2022 +0200
@@ -0,0 +1,39 @@
+########################################################################
+##
+## Copyright (C) 2022 The Octave Project Developers
+##
+## See the file COPYRIGHT.md in the top-level directory of this
+## distribution or <https://octave.org/copyright/>.
+##
+## This file is part of Octave.
+##
+## Octave is free software: you can redistribute it and/or modify it
+## under the terms of the GNU General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## Octave is distributed in the hope that it will be useful, but
+## WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with Octave; see the file COPYING.  If not, see
+## <https://www.gnu.org/licenses/>.
+##
+########################################################################
+
+## -*- texinfo -*-
+## @deftypefn {} {} cat (@var{fobj1}, @var{dots})
+## Concatenate inline function objects.
+##
+## Concatenating inline function objects is @strong{not} possible;
+## Octave emits an error if this function is called.
+## @seealso{inline}
+## @end deftypefn
+
+function cat (varargin)
+
+  error ("@inline/cat: concatenating inline function objects is not possible");
+
+endfunction
--- a/scripts/legacy/@inline/char.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/legacy/@inline/char.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,20 +24,17 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} char (@var{fun})
-## Return a character string representing the inline function @var{fun}.
+## @deftypefn {} {@var{fcnstr} =} char (@var{fobj})
+## Return a character string representing the inline function object
+## @var{fobj}.
 ##
-## Note that @code{char (@var{fun})} is equivalent to
-## @code{formula (@var{fun})}.
-## @seealso{char, argnames, inline, vectorize}
+## Programming Note: @code{char (@var{fobj})} is equivalent to
+## @code{formula (@var{fobj})}.
+## @seealso{formula, argnames, vectorize, inline}
 ## @end deftypefn
 
-function expr = char (obj)
+function fcnstr = char (fobj)
 
-  if (nargin < 1)
-    print_usage ();
-  endif
-
-  expr = obj.expr;
+  fcnstr = fobj.expr;
 
 endfunction
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/scripts/legacy/@inline/disp.m	Mon Aug 29 13:58:00 2022 +0200
@@ -0,0 +1,42 @@
+########################################################################
+##
+## Copyright (C) 2017-2022 The Octave Project Developers
+##
+## See the file COPYRIGHT.md in the top-level directory of this
+## distribution or <https://octave.org/copyright/>.
+##
+## This file is part of Octave.
+##
+## Octave is free software: you can redistribute it and/or modify it
+## under the terms of the GNU General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## Octave is distributed in the hope that it will be useful, but
+## WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with Octave; see the file COPYING.  If not, see
+## <https://www.gnu.org/licenses/>.
+##
+########################################################################
+
+## -*- texinfo -*-
+## @deftypefn {} {} disp (@var{fobj})
+## Display an @code{inline} function object.
+## @seealso{display}
+## @end deftypefn
+
+function disp (fobj)
+
+  disp ("inline function object:");
+  ## FIXME: inputname doesn't work with @class methods
+  ## str = inputname (1);
+  ## args = strjoin (fobj.args, ',');
+  ## str = [str '(' args ')' " = " fobj.expr];
+  ## disp (str);
+  disp (formula (fobj));
+
+endfunction
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/scripts/legacy/@inline/exist.m	Mon Aug 29 13:58:00 2022 +0200
@@ -0,0 +1,37 @@
+########################################################################
+##
+## Copyright (C) 2022 The Octave Project Developers
+##
+## See the file COPYRIGHT.md in the top-level directory of this
+## distribution or <https://octave.org/copyright/>.
+##
+## This file is part of Octave.
+##
+## Octave is free software: you can redistribute it and/or modify it
+## under the terms of the GNU General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## Octave is distributed in the hope that it will be useful, but
+## WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with Octave; see the file COPYING.  If not, see
+## <https://www.gnu.org/licenses/>.
+##
+########################################################################
+
+## -*- texinfo -*-
+## @deftypefn {} {@var{C} =} exist (@var{fobj})
+## Return code 1 indicating @var{fobj} is an Octave variable.
+##
+## @seealso{inline}
+## @end deftypefn
+
+function retval = exist (fobj)
+
+  retval = 1;
+
+endfunction
--- a/scripts/legacy/@inline/feval.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/legacy/@inline/feval.m	Mon Aug 29 13:58:00 2022 +0200
@@ -23,14 +23,8 @@
 ##
 ########################################################################
 
-function retval = feval (fcn, varargin)
+function retval = feval (fobj, varargin)
 
-  if (nargin < 1)
-    print_usage ();
-  endif
-
-  fh = eval (sprintf ("@(%s) %s", strjoin (fcn.args, ","), fcn.expr));
-
-  retval = fh (varargin{:});
+  retval = fobj.fh (varargin{:});
 
 endfunction
--- a/scripts/legacy/@inline/formula.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/legacy/@inline/formula.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,20 +24,16 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} formula (@var{fun})
-## Return a character string representing the inline function @var{fun}.
+## @deftypefn {} {@var{fcnstr} =} formula (@var{fobj})
+## Return a character string representing the inline function @var{fobj}.
 ##
-## Note that @code{char (@var{fun})} is equivalent to
-## @code{formula (@var{fun})}.
-## @seealso{char, argnames, inline, vectorize}
+## Programming Note: @code{char (@var{fobj})} is equivalent to
+## @code{formula (@var{fobj})}.
+## @seealso{char, argnames, vectorize, inline}
 ## @end deftypefn
 
-function expr = formula (obj)
+function fcnstr = formula (obj)
 
-  if (nargin < 1)
-    print_usage ();
-  endif
-
-  expr = obj.expr;
+  fcnstr = obj.expr;
 
 endfunction
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/scripts/legacy/@inline/horzcat.m	Mon Aug 29 13:58:00 2022 +0200
@@ -0,0 +1,39 @@
+########################################################################
+##
+## Copyright (C) 2022 The Octave Project Developers
+##
+## See the file COPYRIGHT.md in the top-level directory of this
+## distribution or <https://octave.org/copyright/>.
+##
+## This file is part of Octave.
+##
+## Octave is free software: you can redistribute it and/or modify it
+## under the terms of the GNU General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## Octave is distributed in the hope that it will be useful, but
+## WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with Octave; see the file COPYING.  If not, see
+## <https://www.gnu.org/licenses/>.
+##
+########################################################################
+
+## -*- texinfo -*-
+## @deftypefn {} {} horzcat (@var{fobj1}, @var{dots})
+## Horizontally concatenate inline function objects.
+##
+## Concatenating inline function objects is @strong{not} possible;
+## Octave emits an error if this function is called.
+## @seealso{inline}
+## @end deftypefn
+
+function horzcat (varargin)
+
+  error ("@inline/horzcat: concatenating inline function objects is not possible");
+
+endfunction
--- a/scripts/legacy/@inline/inline.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/legacy/@inline/inline.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,20 +24,20 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} inline (@var{str})
-## @deftypefnx {} {} inline (@var{str}, @var{arg1}, @dots{})
-## @deftypefnx {} {} inline (@var{str}, @var{n})
+## @deftypefn  {} {@var{fobj} =} inline (@var{str})
+## @deftypefnx {} {@var{fobj} =} inline (@var{str}, @var{arg1}, @dots{})
+## @deftypefnx {} {@var{fobj} =} inline (@var{str}, @var{n})
 ##
 ## This function is obsolete.  Use anonymous functions
 ## (@pxref{Anonymous Functions}) instead.
 ##
-## Create an inline function from the character string @var{str}.
+## Create an inline function object from the character string @var{str}.
 ##
 ## If called with a single argument, the arguments of the generated
 ## function are extracted from the function itself.  The generated
 ## function arguments will then be in alphabetical order.  It should be
 ## noted that i and j are ignored as arguments due to the ambiguity
-## between their use as a variable or their use as an built-in constant.
+## between their use as a variable and their use as an built-in constant.
 ## All arguments followed by a parenthesis are considered to be
 ## functions.  If no arguments are found, a function taking a single
 ## argument named @code{x} will be created.
@@ -55,7 +55,7 @@
 ## @seealso{argnames, formula, vectorize, str2func}
 ## @end deftypefn
 
-function obj = inline (expr, varargin)
+function fobj = inline (expr, varargin)
 
   persistent warned = false;
   if (! warned)
@@ -97,13 +97,16 @@
 
   p.expr = expr;
   p.args = args(:);
-  p.numArgs = numel (args);
+  p.nargs = numel (args);
+  p.fh = eval (sprintf ("@(%s) %s", strjoin (args(:), ","), expr));
+
+  ## FIXME: Do we need these parts of inline struct anymore (4/6/22)?
   tmp = [args; num2cell(1:numel(args))];
   p.inputExpr = sprintf ("%s = INLINE_INPUTS_{%d}; ", tmp{:});
   p.isEmpty = false;
   p.version = 1;
 
-  obj = __inline_ctor__ (p);
+  fobj = __inline_ctor__ (p);
 
 endfunction
 
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/scripts/legacy/@inline/nargin.m	Mon Aug 29 13:58:00 2022 +0200
@@ -0,0 +1,37 @@
+########################################################################
+##
+## Copyright (C) 2022 The Octave Project Developers
+##
+## See the file COPYRIGHT.md in the top-level directory of this
+## distribution or <https://octave.org/copyright/>.
+##
+## This file is part of Octave.
+##
+## Octave is free software: you can redistribute it and/or modify it
+## under the terms of the GNU General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## Octave is distributed in the hope that it will be useful, but
+## WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with Octave; see the file COPYING.  If not, see
+## <https://www.gnu.org/licenses/>.
+##
+########################################################################
+
+## -*- texinfo -*-
+## @deftypefn {} {@var{n} =} nargin (@var{fobj})
+## Return the number of input arguments for the inline function object
+## @var{fobj}.
+## @seealso{nargout, argnames, inline}
+## @end deftypefn
+
+function n = nargin (fobj)
+
+  n = fobj.nargs;
+
+endfunction
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/scripts/legacy/@inline/nargout.m	Mon Aug 29 13:58:00 2022 +0200
@@ -0,0 +1,40 @@
+########################################################################
+##
+## Copyright (C) 2022 The Octave Project Developers
+##
+## See the file COPYRIGHT.md in the top-level directory of this
+## distribution or <https://octave.org/copyright/>.
+##
+## This file is part of Octave.
+##
+## Octave is free software: you can redistribute it and/or modify it
+## under the terms of the GNU General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## Octave is distributed in the hope that it will be useful, but
+## WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with Octave; see the file COPYING.  If not, see
+## <https://www.gnu.org/licenses/>.
+##
+########################################################################
+
+## -*- texinfo -*-
+## @deftypefn {} {@var{n} =} nargout (@var{fobj})
+## Return the number of output arguments for the inline function object
+## @var{fobj}.
+##
+## Programming Note: The return value is always 1 because @code{inline}
+## function objects only support one output.
+## @seealso{nargin, inline}
+## @end deftypefn
+
+function n = nargout (fobj)
+
+  n = 1;
+
+endfunction
--- a/scripts/legacy/@inline/subsref.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/legacy/@inline/subsref.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,11 +24,11 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {@var{value} =} subsref (@var{fcn}, @var{idx})
-## Perform subscripted function call on the inline function object @var{fcn}.
+## @deftypefn {} {@var{value} =} subsref (@var{fobj}, @var{idx})
+## Perform subscripted function call on the inline function object @var{fobj}.
 ## @end deftypefn
 
-function retval = subsref (fcn, idx)
+function retval = subsref (fobj, idx)
 
   if (nargin != 2)
     print_usage ();
@@ -41,9 +41,9 @@
   if (strcmp (idx(1).type, "()"))
     args = idx.subs;
     if (numel (args) > 0)
-      retval = feval (fcn, args{:});
+      retval = feval (fobj, args{:});
     else
-      retval = feval (fcn);
+      retval = feval (fobj);
     endif
   else
     error ("@inline/subsref: invalid subscript type");
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/scripts/legacy/@inline/symvar.m	Mon Aug 29 13:58:00 2022 +0200
@@ -0,0 +1,40 @@
+########################################################################
+##
+## Copyright (C) 2022 The Octave Project Developers
+##
+## See the file COPYRIGHT.md in the top-level directory of this
+## distribution or <https://octave.org/copyright/>.
+##
+## This file is part of Octave.
+##
+## Octave is free software: you can redistribute it and/or modify it
+## under the terms of the GNU General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## Octave is distributed in the hope that it will be useful, but
+## WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with Octave; see the file COPYING.  If not, see
+## <https://www.gnu.org/licenses/>.
+##
+########################################################################
+
+## -*- texinfo -*-
+## @deftypefn {} {@var{args} =} symvar (@var{fobj})
+## Return a cell array of character strings containing the names of the
+## arguments of the inline function object @var{fobj}.
+##
+## Programming Note: @code{symvar (@var{fobj})} is equivalent to
+## @code{argnames (@var{fobj})}.
+## @seealso{argnames, formula, vectorize, inline}
+## @end deftypefn
+
+function args = symvar (fobj)
+
+  args = fobj.args;
+
+endfunction
--- a/scripts/legacy/@inline/vectorize.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/legacy/@inline/vectorize.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} vectorize (@var{fun})
-## Create a vectorized version of the inline function @var{fun} by
+## @deftypefn {} {@var{vfcn} =} vectorize (@var{fobj})
+## Create a vectorized version of the inline function @var{fobj} by
 ## replacing all occurrences of @code{*}, @code{/}, etc., with
 ## @code{.*}, @code{./}, etc.
 ##
@@ -35,27 +35,17 @@
 ##
 ## @example
 ## @group
-## fcn = vectorize (inline ("x^2 - 1"))
-##    @result{} fcn = f(x) = x.^2 - 1
-## quadv (fcn, 0, 3)
+## fobj = vectorize (inline ("x^2 - 1"))
+##    @result{} fobj = f(x) = x.^2 - 1
+## quadv (fobj, 0, 3)
 ##    @result{} 6
 ## @end group
 ## @end example
 ## @seealso{inline, formula, argnames}
 ## @end deftypefn
 
-## The following function was translated directly from the original C++
-## version.  Yes, it will be slow, but the use of inline functions is
-## strongly discouraged anyway, and most expressions will probably be
-## short.  It may also be buggy.  Well, don't use this object!  Use
-## function handles instead!
+function vfcn = vectorize (fobj)
 
-function fcn = vectorize (obj)
-
-  if (nargin < 1)
-    print_usage ();
-  endif
-
-  fcn = inline (__vectorize__ (obj.expr));
+  vfcn = inline (__vectorize__ (fobj.expr));
 
 endfunction
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/scripts/legacy/@inline/vertcat.m	Mon Aug 29 13:58:00 2022 +0200
@@ -0,0 +1,39 @@
+########################################################################
+##
+## Copyright (C) 2022 The Octave Project Developers
+##
+## See the file COPYRIGHT.md in the top-level directory of this
+## distribution or <https://octave.org/copyright/>.
+##
+## This file is part of Octave.
+##
+## Octave is free software: you can redistribute it and/or modify it
+## under the terms of the GNU General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## Octave is distributed in the hope that it will be useful, but
+## WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with Octave; see the file COPYING.  If not, see
+## <https://www.gnu.org/licenses/>.
+##
+########################################################################
+
+## -*- texinfo -*-
+## @deftypefn {} {} vertcat (@var{fobj1}, @var{dots})
+## Vertically concatenate inline function objects.
+##
+## Concatenating inline function objects is @strong{not} possible;
+## Octave emits an error if this function is called.
+## @seealso{inline}
+## @end deftypefn
+
+function vertcat (varargin)
+
+  error ("@inline/vertcat: concatenating inline function objects is not possible");
+
+endfunction
--- a/scripts/legacy/__vectorize__.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/legacy/__vectorize__.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,10 +24,15 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} __vectorize__ (@var{expr})
+## @deftypefn {} {@var{new_expr} =} __vectorize__ (@var{expr})
 ## Undocumented internal function.
 ## @end deftypefn
 
+## The following function was translated directly from the original C++
+## version.  Yes, it will be slow, but its use is strongly discouraged
+## anyway, and most expressions will probably be short.  It may also be
+## buggy.  Well, don't use this function!
+
 function new_expr = __vectorize__ (expr);
 
   new_expr = "";
--- a/scripts/legacy/findstr.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/legacy/findstr.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} findstr (@var{s}, @var{t})
-## @deftypefnx {} {} findstr (@var{s}, @var{t}, @var{overlap})
+## @deftypefn  {} {@var{v} =} findstr (@var{s}, @var{t})
+## @deftypefnx {} {@var{v} =} findstr (@var{s}, @var{t}, @var{overlap})
 ##
 ## This function is obsolete.  Use @code{strfind} instead.
 ##
--- a/scripts/legacy/flipdim.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/legacy/flipdim.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,13 +24,13 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} flipdim (@var{x})
-## @deftypefnx {} {} flipdim (@var{x}, @var{dim})
+## @deftypefn  {} {@var{B} =} flipdim (@var{A})
+## @deftypefnx {} {@var{B} =} flipdim (@var{A}, @var{dim})
 ## This function is obsolete.  Use @code{flip} instead.
 ## @seealso{flip, fliplr, flipud, rot90, rotdim}
 ## @end deftypefn
 
-function y = flipdim (varargin)
+function B = flipdim (varargin)
 
   persistent warned = false;
   if (! warned)
@@ -39,6 +39,6 @@
              "flipdim is obsolete; please use flip instead");
   endif
 
-  y = flip (varargin{:});
+  B = flip (varargin{:});
 
 endfunction
--- a/scripts/legacy/isdir.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/legacy/isdir.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} isdir (@var{f})
+## @deftypefn {} {@var{tf} =} isdir (@var{f})
 ##
 ## This function is not recommended.  Use @code{isfolder} or
 ## @code{file_in_loadpath} instead.
@@ -43,7 +43,7 @@
 ## is_rooted_relative_filename}
 ## @end deftypefn
 
-function retval = isdir (f)
+function tf = isdir (f)
 
   persistent warned = false;
   if (! warned)
@@ -57,7 +57,7 @@
   endif
 
   ## Exist returns an integer but isdir should return a logical.
-  retval = (exist (f, "dir") == 7);
+  tf = (exist (f, "dir") == 7);
 
 endfunction
 
--- a/scripts/legacy/isstr.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/legacy/isstr.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} isstr (@var{x})
+## @deftypefn {} {@var{tf} =} isstr (@var{x})
 ## This function is obsolete.  Use @code{ischar} instead.
 ## @seealso{ischar}
 ## @end deftypefn
@@ -33,7 +33,7 @@
 ## removed in some future version.  Now users are told that it should be
 ## avoided, but there is no mention of possible future removal.
 
-function retval = isstr (varargin)
+function tf = isstr (varargin)
 
   persistent warned = false;
   if (! warned)
@@ -42,6 +42,6 @@
              "isstr is obsolete; please use ischar instead");
   endif
 
-  retval = ischar (varargin{:});
+  tf = ischar (varargin{:});
 
 endfunction
--- a/scripts/legacy/module.mk	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/legacy/module.mk	Mon Aug 29 13:58:00 2022 +0200
@@ -26,12 +26,20 @@
 
 %canon_reldir%_@inline_FCN_FILES = \
   %reldir%/@inline/argnames.m \
+  %reldir%/@inline/cat.m \
   %reldir%/@inline/char.m \
+  %reldir%/@inline/disp.m \
+  %reldir%/@inline/exist.m \
   %reldir%/@inline/feval.m \
   %reldir%/@inline/formula.m \
+  %reldir%/@inline/horzcat.m \
   %reldir%/@inline/inline.m \
+  %reldir%/@inline/nargin.m \
+  %reldir%/@inline/nargout.m \
   %reldir%/@inline/subsref.m \
-  %reldir%/@inline/vectorize.m
+  %reldir%/@inline/symvar.m \
+  %reldir%/@inline/vectorize.m \
+  %reldir%/@inline/vertcat.m
 
 %canon_reldir%_@inlinedir = $(fcnfiledir)/legacy/@inline
 
--- a/scripts/legacy/strmatch.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/legacy/strmatch.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} strmatch (@var{s}, @var{A})
-## @deftypefnx {} {} strmatch (@var{s}, @var{A}, "exact")
+## @deftypefn  {} {@var{idx} =} strmatch (@var{s}, @var{A})
+## @deftypefnx {} {@var{idx} =} strmatch (@var{s}, @var{A}, "exact")
 ##
 ## This function is obsolete.  @strong{Use an alternative} such as
 ## @code{strncmp} or @code{strcmp} instead.
--- a/scripts/legacy/vectorize.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/legacy/vectorize.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,9 +24,9 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} vectorize (@var{fun})
+## @deftypefn {} {@var{vfcn} =} vectorize (@var{fcn})
 ## Create a vectorized version of the anonymous function or expression
-## @var{fun} by replacing all occurrences of @code{*}, @code{/}, etc.,
+## @var{fcn} by replacing all occurrences of @code{*}, @code{/}, etc.,
 ## with @code{.*}, @code{./}, etc.
 ##
 ## Note that the transformation is extremely simplistic.  Use of this
@@ -34,12 +34,7 @@
 ## version of Octave.
 ## @end deftypefn
 
-## The following function was translated directly from the original C++
-## version.  Yes, it will be slow, but its use is strongly discouraged
-## anyway, and most expressions will probably be short.  It may also be
-## buggy.  Well, don't use this function!
-
-function retval = vectorize (fun)
+function vfcn = vectorize (fcn)
 
   persistent warned = false;
   if (! warned)
@@ -52,21 +47,21 @@
     print_usage ();
   endif
 
-  if (isa (fun, "function_handle"))
-    finfo = functions (fun);
+  if (isa (fcn, "function_handle"))
+    finfo = functions (fcn);
     if (! strcmp (finfo.type, "anonymous"))
-      error ("vectorize: FUN must be a string or anonymous function handle");
+      error ("vectorize: FCN must be a string or anonymous function handle");
     endif
     expr = finfo.function;
     idx = index (expr, ")");
     args = expr(1:idx);
     expr = expr(idx+1:end);
     new_expr = __vectorize__ (expr);
-    retval = str2func ([args, new_expr]);
-  elseif (ischar (fun))
-    retval = __vectorize__ (fun);
+    vfcn = str2func ([args, new_expr]);
+  elseif (ischar (fcn))
+    vfcn = __vectorize__ (fcn);
   else
-    error ("vectorize: FUN must be a string or anonymous function handle");
+    error ("vectorize: FCN must be a string or anonymous function handle");
   endif
 
 endfunction
@@ -92,4 +87,4 @@
 
 ## Test input validation
 %!error <Invalid call> vectorize ()
-%!error <FUN must be a string or anonymous function handle> vectorize (1)
+%!error <FCN must be a string or anonymous function handle> vectorize (1)
--- a/scripts/linear-algebra/commutation_matrix.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/linear-algebra/commutation_matrix.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} commutation_matrix (@var{m}, @var{n})
+## @deftypefn {} {@var{k} =} commutation_matrix (@var{m}, @var{n})
 ## Return the commutation matrix
 ## @tex
 ##  $K_{m,n}$
--- a/scripts/linear-algebra/cond.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/linear-algebra/cond.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} cond (@var{A})
-## @deftypefnx {} {} cond (@var{A}, @var{p})
+## @deftypefn  {} {@var{c} =} cond (@var{A})
+## @deftypefnx {} {@var{c} =} cond (@var{A}, @var{p})
 ## Compute the @var{p}-norm condition number of a matrix with respect to
 ## inversion.
 ##
@@ -51,7 +51,7 @@
 ## @seealso{condest, rcond, condeig, norm, svd}
 ## @end deftypefn
 
-function retval = cond (A, p = 2)
+function c = cond (A, p = 2)
 
   if (nargin < 1)
     print_usage ();
@@ -63,7 +63,7 @@
 
   if (p == 2)
     if (isempty (A))
-      retval = 0.0;
+      c = 0.0;
     elseif (any (! isfinite (A(:))))
       error ("cond: A must not contain Inf or NaN values");
     else
@@ -71,13 +71,13 @@
       sigma_1 = sigma(1);
       sigma_n = sigma(end);
       if (sigma_1 == 0 || sigma_n == 0)
-        retval = Inf;
+        c = Inf;
       else
-        retval = sigma_1 / sigma_n;
+        c = sigma_1 / sigma_n;
       endif
     endif
   else
-    retval = norm (A, p) * norm (inv (A), p);
+    c = norm (A, p) * norm (inv (A), p);
   endif
 
 endfunction
--- a/scripts/linear-algebra/cross.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/linear-algebra/cross.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} cross (@var{x}, @var{y})
-## @deftypefnx {} {} cross (@var{x}, @var{y}, @var{dim})
+## @deftypefn  {} {@var{z} =} cross (@var{x}, @var{y})
+## @deftypefnx {} {@var{z} =} cross (@var{x}, @var{y}, @var{dim})
 ## Compute the vector cross product of two 3-dimensional vectors @var{x} and
 ## @var{y}.
 ##
--- a/scripts/linear-algebra/duplication_matrix.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/linear-algebra/duplication_matrix.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} duplication_matrix (@var{n})
+## @deftypefn {} {@var{d} =} duplication_matrix (@var{n})
 ## Return the duplication matrix
 ## @tex
 ##  $D_n$
@@ -37,21 +37,21 @@
 ##  $n^2 \times n(n+1)/2$
 ## @end tex
 ## @ifnottex
-## @math{n^2} by @math{n*(n+1)/2}
+## @math{N^2}-by-@math{N*(N+1)/2}
 ## @end ifnottex
 ## matrix such that
 ## @tex
 ##  $D_n * {\rm vech} (A) = {\rm vec} (A)$
 ## @end tex
 ## @ifnottex
-## @nospell{@math{Dn vech (A) = vec (A)}}
+## @nospell{@code{Dn * vech (A) = vec (A)}}
 ## @end ifnottex
 ## for all symmetric
 ## @tex
 ##  $n \times n$
 ## @end tex
 ## @ifnottex
-## @math{n} by @math{n}
+## @math{N}-by-@math{N}
 ## @end ifnottex
 ## matrices
 ## @tex
--- a/scripts/linear-algebra/expm.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/linear-algebra/expm.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} expm (@var{A})
+## @deftypefn {} {@var{r} =} expm (@var{A})
 ## Return the exponential of a matrix.
 ##
 ## The matrix exponential is defined as the infinite Taylor series
--- a/scripts/linear-algebra/isbanded.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/linear-algebra/isbanded.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} isbanded (@var{A}, @var{lower}, @var{upper})
+## @deftypefn {} {@var{tf} =} isbanded (@var{A}, @var{lower}, @var{upper})
 ## Return true if @var{A} is a matrix with entries confined between
 ## @var{lower} diagonals below the main diagonal and @var{upper} diagonals
 ## above the main diagonal.
@@ -33,7 +33,7 @@
 ## @seealso{isdiag, istril, istriu, bandwidth}
 ## @end deftypefn
 
-function retval = isbanded (A, lower, upper)
+function tf = isbanded (A, lower, upper)
 
   if (nargin != 3)
     print_usage ();
@@ -44,16 +44,16 @@
   endif
 
   if (isempty (A))
-    retval = [];
+    tf = [];
   else
-    retval = (isnumeric (A) || islogical (A)) && ndims (A) == 2;
-    if (retval)
+    tf = (isnumeric (A) || islogical (A)) && ndims (A) == 2;
+    if (tf)
       [i, j] = find (A);
       pupp = j >= i;
-      retval = all (j(pupp) - i(pupp) <= upper);
-      if (retval)
+      tf = all (j(pupp) - i(pupp) <= upper);
+      if (tf)
         plow = i >= j;
-        retval = all (i(plow) - j(plow) <= lower);
+        tf = all (i(plow) - j(plow) <= lower);
       endif
     endif
   endif
--- a/scripts/linear-algebra/isdefinite.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/linear-algebra/isdefinite.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} isdefinite (@var{A})
-## @deftypefnx {} {} isdefinite (@var{A}, @var{tol})
+## @deftypefn  {} {@var{tf} =} isdefinite (@var{A})
+## @deftypefnx {} {@var{tf} =} isdefinite (@var{A}, @var{tol})
 ## Return true if @var{A} is symmetric positive definite matrix within the
 ## tolerance specified by @var{tol}.
 ##
@@ -47,14 +47,14 @@
 ## @seealso{issymmetric, ishermitian}
 ## @end deftypefn
 
-function retval = isdefinite (A, tol)
+function tf = isdefinite (A, tol)
 
   if (nargin < 1)
     print_usage ();
   endif
 
   ## Validate inputs
-  retval = false;
+  tf = false;
   if (! isnumeric (A))
     return;
   endif
@@ -76,7 +76,7 @@
   e = tol * eye (rows (A));
   [~, p] = chol (A - e);
   if (p == 0)
-    retval = true;
+    tf = true;
   endif
 
 endfunction
--- a/scripts/linear-algebra/isdiag.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/linear-algebra/isdiag.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,24 +24,24 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} isdiag (@var{A})
+## @deftypefn {} {@var{tf} =} isdiag (@var{A})
 ## Return true if @var{A} is a diagonal matrix.
 ## @seealso{isbanded, istril, istriu, diag, bandwidth}
 ## @end deftypefn
 
-function retval = isdiag (A)
+function tf = isdiag (A)
 
   if (nargin < 1)
     print_usage ();
   endif
 
   if (strfind (typeinfo (A), "diagonal matrix"))
-    retval = true;
+    tf = true;
   elseif ((isnumeric (A) || islogical (A)) && ndims (A) == 2)
     [i, j] = find (A);
-    retval = all (i == j);
+    tf = all (i == j);
   else
-    retval = false;
+    tf = false;
   endif
 
 endfunction
--- a/scripts/linear-algebra/ishermitian.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/linear-algebra/ishermitian.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,10 +24,10 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} ishermitian (@var{A})
-## @deftypefnx {} {} ishermitian (@var{A}, @var{tol})
-## @deftypefnx {} {} ishermitian (@var{A}, @qcode{"skew"})
-## @deftypefnx {} {} ishermitian (@var{A}, @qcode{"skew"}, @var{tol})
+## @deftypefn  {} {@var{tf} =} ishermitian (@var{A})
+## @deftypefnx {} {@var{tf} =} ishermitian (@var{A}, @var{tol})
+## @deftypefnx {} {@var{tf} =} ishermitian (@var{A}, @qcode{"skew"})
+## @deftypefnx {} {@var{tf} =} ishermitian (@var{A}, @qcode{"skew"}, @var{tol})
 ## Return true if @var{A} is a Hermitian or skew-Hermitian matrix within the
 ## tolerance specified by @var{tol}.
 ##
@@ -50,7 +50,7 @@
 ## @seealso{issymmetric, isdefinite}
 ## @end deftypefn
 
-function retval = ishermitian (A, skewopt = "nonskew", tol = 0)
+function tf = ishermitian (A, skewopt = "nonskew", tol = 0)
 
   if (nargin < 1)
     print_usage ();
@@ -67,8 +67,8 @@
   endif
 
   ## Validate inputs
-  retval = (isnumeric (A) || islogical (A)) && issquare (A);
-  if (! retval)
+  tf = (isnumeric (A) || islogical (A)) && issquare (A);
+  if (! tf)
     return;
   endif
 
@@ -84,26 +84,26 @@
   if (strcmp (skewopt, "nonskew"))
     if (tol == 0)
       ## check for exact symmetry
-      retval = full (! any ((A != A')(:)));
+      tf = full (! any ((A != A')(:)));
     else
       if (islogical (A))
         ## Hack to allow norm to work.  Choose single to minimize memory.
         A = single (A);
       endif
       norm_x = norm (A, Inf);
-      retval = norm_x == 0 || norm (A - A', Inf) / norm_x <= tol;
+      tf = norm_x == 0 || norm (A - A', Inf) / norm_x <= tol;
     endif
   else
     ## skew-Hermitian
     if (tol == 0)
-      retval = full (! any ((A != -A')(:)));
+      tf = full (! any ((A != -A')(:)));
     else
       if (islogical (A))
         ## Hack to allow norm to work.  Choose single to minimize memory.
         A = single (A);
       endif
       norm_x = norm (A, Inf);
-      retval = norm_x == 0 || norm (A + A', Inf) / norm_x <= tol;
+      tf = norm_x == 0 || norm (A + A', Inf) / norm_x <= tol;
     endif
   endif
 
--- a/scripts/linear-algebra/issymmetric.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/linear-algebra/issymmetric.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,10 +24,10 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} issymmetric (@var{A})
-## @deftypefnx {} {} issymmetric (@var{A}, @var{tol})
-## @deftypefnx {} {} issymmetric (@var{A}, @qcode{"skew"})
-## @deftypefnx {} {} issymmetric (@var{A}, @qcode{"skew"}, @var{tol})
+## @deftypefn  {} {@var{tf} =} issymmetric (@var{A})
+## @deftypefnx {} {@var{tf} =} issymmetric (@var{A}, @var{tol})
+## @deftypefnx {} {@var{tf} =} issymmetric (@var{A}, @qcode{"skew"})
+## @deftypefnx {} {@var{tf} =} issymmetric (@var{A}, @qcode{"skew"}, @var{tol})
 ## Return true if @var{A} is a symmetric or skew-symmetric matrix within the
 ## tolerance specified by @var{tol}.
 ##
@@ -49,7 +49,7 @@
 ## @seealso{ishermitian, isdefinite}
 ## @end deftypefn
 
-function retval = issymmetric (A, skewopt = "nonskew", tol = 0)
+function tf = issymmetric (A, skewopt = "nonskew", tol = 0)
 
   if (nargin < 1)
     print_usage ();
@@ -79,7 +79,7 @@
   endif
 
   if (! issquare (A))
-    retval = false;
+    tf = false;
     return;
   endif
 
@@ -87,26 +87,26 @@
   if (strcmp (skewopt, "nonskew"))
     if (tol == 0)
       ## check for exact symmetry
-      retval = full (! any ((A != A.')(:)));
+      tf = full (! any ((A != A.')(:)));
     else
       if (! isnumeric (A))
         ## Hack to allow norm to work.  Choose single to minimize memory.
         A = single (A);
       endif
       norm_x = norm (A, Inf);
-      retval = norm_x == 0 || norm (A - A.', Inf) / norm_x <= tol;
+      tf = norm_x == 0 || norm (A - A.', Inf) / norm_x <= tol;
     endif
   else
     ## skew symmetry
     if (tol == 0)
-      retval = full (! any ((A != -A.')(:)));
+      tf = full (! any ((A != -A.')(:)));
     else
       if (! isnumeric (A))
         ## Hack to allow norm to work.  Choose single to minimize memory.
         A = single (A);
       endif
       norm_x = norm (A, Inf);
-      retval = norm_x == 0 || norm (A + A.', Inf) / norm_x <= tol;
+      tf = norm_x == 0 || norm (A + A.', Inf) / norm_x <= tol;
     endif
   endif
 
--- a/scripts/linear-algebra/istril.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/linear-algebra/istril.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} istril (@var{A})
+## @deftypefn {} {@var{tf} =} istril (@var{A})
 ## Return true if @var{A} is a lower triangular matrix.
 ##
 ## A lower triangular matrix has nonzero entries only on the main diagonal and
@@ -32,16 +32,16 @@
 ## @seealso{istriu, isbanded, isdiag, tril, bandwidth}
 ## @end deftypefn
 
-function retval = istril (A)
+function tf = istril (A)
 
   if (nargin < 1)
     print_usage ();
   endif
 
-  retval = (isnumeric (A) || islogical (A)) && ndims (A) == 2;
-  if (retval)
+  tf = (isnumeric (A) || islogical (A)) && ndims (A) == 2;
+  if (tf)
     [i, j] = find (A);
-    retval = all (i >= j);
+    tf = all (i >= j);
   endif
 
 endfunction
--- a/scripts/linear-algebra/istriu.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/linear-algebra/istriu.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} istriu (@var{A})
+## @deftypefn {} {@var{tf} =} istriu (@var{A})
 ## Return true if @var{A} is an upper triangular matrix.
 ##
 ## An upper triangular matrix has nonzero entries only on the main diagonal and
@@ -32,16 +32,16 @@
 ## @seealso{isdiag, isbanded, istril, triu, bandwidth}
 ## @end deftypefn
 
-function retval = istriu (A)
+function tf = istriu (A)
 
   if (nargin < 1)
     print_usage ();
   endif
 
-  retval = (isnumeric (A) || islogical (A)) && ndims (A) == 2;
-  if (retval)
+  tf = (isnumeric (A) || islogical (A)) && ndims (A) == 2;
+  if (tf)
     [i, j] = find (A);
-    retval = all (i <= j);
+    tf = all (i <= j);
   endif
 
 endfunction
--- a/scripts/linear-algebra/normest1.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/linear-algebra/normest1.m	Mon Aug 29 13:58:00 2022 +0200
@@ -27,7 +27,7 @@
 ## @deftypefn  {} {@var{nest} =} normest1 (@var{A})
 ## @deftypefnx {} {@var{nest} =} normest1 (@var{A}, @var{t})
 ## @deftypefnx {} {@var{nest} =} normest1 (@var{A}, @var{t}, @var{x0})
-## @deftypefnx {} {@var{nest} =} normest1 (@var{Afun}, @var{t}, @var{x0}, @var{p1}, @var{p2}, @dots{})
+## @deftypefnx {} {@var{nest} =} normest1 (@var{Afcn}, @var{t}, @var{x0}, @var{p1}, @var{p2}, @dots{})
 ## @deftypefnx {} {[@var{nest}, @var{v}] =} normest1 (@var{A}, @dots{})
 ## @deftypefnx {} {[@var{nest}, @var{v}, @var{w}] =} normest1 (@var{A}, @dots{})
 ## @deftypefnx {} {[@var{nest}, @var{v}, @var{w}, @var{iter}] =} normest1 (@var{A}, @dots{})
@@ -39,7 +39,7 @@
 ## estimate of the 1-norm of a linear operator @var{A} when matrix-vector
 ## products @code{@var{A} * @var{x}} and @code{@var{A}' * @var{x}} can be
 ## cheaply computed.  In this case, instead of the matrix @var{A}, a function
-## @code{@var{Afun} (@var{flag}, @var{x})} is used; it must return:
+## @code{@var{Afcn} (@var{flag}, @var{x})} is used; it must return:
 ##
 ## @itemize @bullet
 ## @item
@@ -69,7 +69,7 @@
 ## @end example
 ##
 ## The parameters @var{p1}, @var{p2}, @dots{} are arguments of
-## @code{@var{Afun} (@var{flag}, @var{x}, @var{p1}, @var{p2}, @dots{})}.
+## @code{@var{Afcn} (@var{flag}, @var{x}, @var{p1}, @var{p2}, @dots{})}.
 ##
 ## The default value for @var{t} is 2.  The algorithm requires matrix-matrix
 ## products with sizes @var{n} x @var{n} and @var{n} x @var{t}.
@@ -134,8 +134,8 @@
     Aismat = false;
     Aisreal = A ("real", [], varargin{:});
     n = A ("dim", [], varargin{:});
-    Afun = @(x) A ("notransp", x, varargin{:});
-    A1fun = @(x) A ("transp", x, varargin{:});
+    Afcn = @(x) A ("notransp", x, varargin{:});
+    A1fcn = @(x) A ("transp", x, varargin{:});
   else
     error ("normest1: A must be a square matrix or a function handle");
   endif
@@ -175,7 +175,7 @@
     if (Aismat)
       Y = A * X;
     else
-      Y = Afun (X);
+      Y = Afcn (X);
     endif
     iter(2)++;
     [nest, j] = max (sum (abs (Y), 1), [], 2);
@@ -222,7 +222,7 @@
       if (Aismat)
         Z = A' * S;
       else
-        Z = A1fun (S);  # (3) of Algorithm 2.4
+        Z = A1fcn (S);  # (3) of Algorithm 2.4
       endif
       iter(2)++;
       h = max (abs (Z), [], 2);
@@ -254,7 +254,7 @@
 endfunction
 
 
-%!function z = afun_A (flag, x, A, n)
+%!function z = afcn_A (flag, x, A, n)
 %!  switch (flag)
 %!  case {"dim"}
 %!    z = n;
@@ -266,7 +266,7 @@
 %!    z = A * x;
 %!  endswitch
 %!endfunction
-%!function z = afun_A_P (flag, x, A, m)
+%!function z = afcn_A_P (flag, x, A, m)
 %!  switch (flag)
 %!  case "dim"
 %!    z = length (A);
@@ -297,17 +297,17 @@
 %! X = [1,1,-1;1,1,1;1,1,-1;1,-1,-1]/3;
 %! assert (normest1 (A, 3, X), norm (A, 1), 2 * eps);
 
-## test Afun
+## test Afcn
 %!test
 %! A = rand (10);
 %! n = length (A);
-%! Afun = @(flag, x) afun_A (flag, x, A, n);
-%! assert (normest1 (Afun), norm (A, 1), 2 * eps);
+%! Afcn = @(flag, x) afcn_A (flag, x, A, n);
+%! assert (normest1 (Afcn), norm (A, 1), 2 * eps);
 
-## test Afun with parameters
+## test Afcn with parameters
 %!test
 %! A = rand (10);
-%! assert (normest1 (@afun_A_P, [], [], A, 3), norm (A ^ 3, 1), 1000 * eps);
+%! assert (normest1 (@afcn_A_P, [], [], A, 3), norm (A ^ 3, 1), 1000 * eps);
 
 ## test output
 %!test
--- a/scripts/linear-algebra/orth.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/linear-algebra/orth.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} orth (@var{A})
-## @deftypefnx {} {} orth (@var{A}, @var{tol})
+## @deftypefn  {} {@var{B} =} orth (@var{A})
+## @deftypefnx {} {@var{B} =} orth (@var{A}, @var{tol})
 ## Return an orthonormal basis of the range space of @var{A}.
 ##
 ## The dimension of the range space is taken as the number of singular values
@@ -38,14 +38,14 @@
 ## @seealso{null}
 ## @end deftypefn
 
-function retval = orth (A, tol)
+function B = orth (A, tol)
 
   if (nargin < 1)
     print_usage ();
   endif
 
   if (isempty (A))
-    retval = [];
+    B = [];
     return;
   endif
 
@@ -72,9 +72,9 @@
   rank = sum (s > tol);
 
   if (rank > 0)
-    retval = -U(:, 1:rank);
+    B = -U(:, 1:rank);
   else
-    retval = zeros (rows, 0);
+    B = zeros (rows, 0);
   endif
 
 endfunction
--- a/scripts/linear-algebra/rank.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/linear-algebra/rank.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} rank (@var{A})
-## @deftypefnx {} {} rank (@var{A}, @var{tol})
+## @deftypefn  {} {@var{k} =} rank (@var{A})
+## @deftypefnx {} {@var{k} =} rank (@var{A}, @var{tol})
 ## Compute the rank of matrix @var{A}, using the singular value decomposition.
 ##
 ## The rank is taken to be the number of singular values of @var{A} that are
@@ -79,7 +79,7 @@
 ## @seealso{null, orth, sprank, svd, eps}
 ## @end deftypefn
 
-function retval = rank (A, tol)
+function k = rank (A, tol)
 
   if (nargin < 1)
     print_usage ();
@@ -101,7 +101,7 @@
     tolerance = tol;
   endif
 
-  retval = sum (sigma > tolerance);
+  k = sum (sigma > tolerance);
 
 endfunction
 
--- a/scripts/linear-algebra/rref.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/linear-algebra/rref.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} rref (@var{A})
-## @deftypefnx {} {} rref (@var{A}, @var{tol})
+## @deftypefn  {} {@var{r} =} rref (@var{A})
+## @deftypefnx {} {@var{r} =} rref (@var{A}, @var{tol})
 ## @deftypefnx {} {[@var{r}, @var{k}] =} rref (@dots{})
 ## Return the reduced row echelon form of @var{A}.
 ##
@@ -89,7 +89,9 @@
       endif
     endif
   endfor
-  k = find (used);
+  if (nargout > 1)
+    k = find (used);
+  endif
 
 endfunction
 
--- a/scripts/linear-algebra/trace.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/linear-algebra/trace.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} trace (@var{A})
+## @deftypefn {} {@var{t} =} trace (@var{A})
 ## Compute the trace of @var{A}, the sum of the elements along the main
 ## diagonal.
 ##
@@ -32,7 +32,7 @@
 ## @seealso{eig}
 ## @end deftypefn
 
-function y = trace (A)
+function t = trace (A)
 
   if (nargin < 1)
     print_usage ();
@@ -41,11 +41,11 @@
   if (ndims (A) > 2)
     error ("trace: only valid on 2-D objects");
   elseif (isempty (A))
-    y = 0;
+    t = 0;
   elseif (isvector (A))
-    y = A(1);
+    t = A(1);
   else
-    y = sum (diag (A));
+    t = sum (diag (A));
   endif
 
 endfunction
--- a/scripts/linear-algebra/vech.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/linear-algebra/vech.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} vech (@var{x})
+## @deftypefn {} {@var{v} =} vech (@var{x})
 ## Return the vector obtained by eliminating all superdiagonal elements of
 ## the square matrix @var{x} and stacking the result one column above the
 ## other.
@@ -37,8 +37,6 @@
 ## See Magnus and Neudecker (1988), Matrix differential calculus with
 ## applications in statistics and econometrics.
 
-## Author KH <Kurt.Hornik@wu-wien.ac.at>
-
 function v = vech (x)
 
   if (nargin < 1)
@@ -58,4 +56,6 @@
 
 %!assert (vech ([1, 2, 3; 4, 5, 6; 7, 8, 9]), [1; 4; 7; 5; 8; 9])
 
+## Test input validation
 %!error <Invalid call> vech ()
+%!error <X must be square> vech ([1,2,3;4,5,6])
--- a/scripts/miscellaneous/cast.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/miscellaneous/cast.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,16 +24,16 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} cast (@var{val}, "@var{type}")
-## @deftypefnx {} {} cast (@var{val}, "@var{like}", @var{var})
-## Convert @var{val} to data type @var{type}.
+## @deftypefn  {} {@var{y} =} cast (@var{x}, "@var{type}")
+## @deftypefnx {} {@var{y} =} cast (@var{x}, "@var{like}", @var{var})
+## Convert @var{x} to data type @var{type}.
 ##
-## The input @var{val} may be a scalar, vector, or matrix of a class that is
+## The input @var{x} may be a scalar, vector, or matrix of a class that is
 ## convertible to the target class (see below).
 ##
-## If a variable @var{var} is specified after @qcode{"like"}, @var{val} is
+## If a variable @var{var} is specified after @qcode{"like"}, @var{x} is
 ## converted to the same data type and sparsity attribute.  If @var{var} is
-## complex, @var{val} will be complex, too.
+## complex, @var{x} will be complex, too.
 ##
 ## @var{var} may be and @var{type} may name any of the following built-in
 ## numeric classes:
@@ -55,7 +55,7 @@
 ## @end group
 ## @end example
 ##
-## The value @var{val} may be modified to fit within the range of the new type.
+## The value @var{x} may be modified to fit within the range of the new type.
 ##
 ## Examples:
 ##
@@ -68,7 +68,7 @@
 ## @end group
 ## @end example
 ##
-## Programming Note: This function relies on the object @var{val} having a
+## Programming Note: This function relies on the object @var{x} having a
 ## conversion method named @var{type}.  User-defined classes may implement only
 ## a subset of the full list of types shown above.  In that case, it may be
 ## necessary to call cast twice in order to reach the desired type.
@@ -84,7 +84,7 @@
 ## double, single, logical, char, class, typeinfo}
 ## @end deftypefn
 
-function retval = cast (val, type, var)
+function y = cast (x, type, var)
 
   if (nargin < 2 || nargin > 3)
     print_usage ();
@@ -105,8 +105,8 @@
     print_usage ();
   endif
 
-  if (! isnumeric (val) && ! islogical (val) && ! ischar (val))
-    error ("cast: type conversion from '%s' is not supported", class (val));
+  if (! isnumeric (x) && ! islogical (x) && ! ischar (x))
+    error ("cast: type conversion from '%s' is not supported", class (x));
   endif
 
   if (! any (strcmp (type, {"int8"; "uint8"; "int16"; "uint16"; "int32";
@@ -115,17 +115,17 @@
     error ("cast: type conversion to '%s' is not supported", type);
   endif
 
-  retval = feval (type, val);
+  y = feval (type, x);
 
   if (is_like)
-    if (issparse (var) && ! issparse (retval))
-      ## retval is of the same type as var, so it must be convertible to sparse
-      retval = sparse (retval);
-    elseif (! issparse (var) && issparse (retval))
-      retval = full (retval);
+    if (issparse (var) && ! issparse (y))
+      ## y is of the same type as var, so it must be convertible to sparse
+      y = sparse (y);
+    elseif (! issparse (var) && issparse (y))
+      y = full (y);
     endif
-    if (iscomplex (var) || iscomplex (val))
-      retval = complex (retval);
+    if (iscomplex (var) || iscomplex (x))
+      y = complex (y);
     endif
   endif
 
--- a/scripts/miscellaneous/compare_versions.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/miscellaneous/compare_versions.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} compare_versions (@var{v1}, @var{v2}, @var{operator})
+## @deftypefn {} {@var{tf} =} compare_versions (@var{v1}, @var{v2}, @var{operator})
 ## Compare two version strings using the given @var{operator}.
 ##
 ## This function assumes that versions @var{v1} and @var{v2} are arbitrarily
@@ -72,7 +72,7 @@
 ## @code{double ("1").}
 ## @end deftypefn
 
-function out = compare_versions (v1, v2, operator)
+function tf = compare_versions (v1, v2, operator)
 
   if (nargin != 3)
     print_usage ();
@@ -165,18 +165,18 @@
 
   if (isempty (firstdiff))
     ## They're equal.
-    out = equal_op;
+    tf = equal_op;
   elseif (lt_op || gt_op)
     ## They're correctly less than or greater than.
-    out = (vcmp(firstdiff) > 0);
+    tf = (vcmp(firstdiff) > 0);
   else
     ## They're not correctly less than or greater than, and they're not equal.
-    out = false;
+    tf = false;
   endif
 
   ## Reverse the output if not is given.
   if (not_op)
-    out = ! out;
+    tf = ! tf;
   endif
 
 endfunction
--- a/scripts/miscellaneous/delete.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/miscellaneous/delete.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,9 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} delete (@var{file})
+## @deftypefn  {} {} delete @var{file}
+## @deftypefnx {} {} delete @var{file1} @var{file2} @dots{}
+## @deftypefnx {} {} delete (@var{file})
 ## @deftypefnx {} {} delete (@var{file1}, @var{file2}, @dots{})
 ## @deftypefnx {} {} delete (@var{handle})
 ## Delete the named file or graphics handle.
--- a/scripts/miscellaneous/dir.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/miscellaneous/dir.m	Mon Aug 29 13:58:00 2022 +0200
@@ -25,7 +25,7 @@
 
 ## -*- texinfo -*-
 ## @deftypefn  {} {} dir
-## @deftypefnx {} {} dir (@var{directory})
+## @deftypefnx {} {} dir @var{directory}
 ## @deftypefnx {} {[@var{list}] =} dir (@var{directory})
 ## Display file listing for directory @var{directory}.
 ##
@@ -79,13 +79,13 @@
 ## FIXME: This is quite slow for large directories.
 ##        Perhaps it should be converted to C++?
 
-function retval = dir (directory = ".")
+function list = dir (directory = ".")
 
   if (! ischar (directory))
     error ("dir: DIRECTORY argument must be a string");
   endif
 
-  ## Prep the retval.
+  ## Prep the list.
   info = struct (zeros (0, 1),
            {"name", "folder" "date", "bytes", "isdir", "datenum", "statinfo"});
 
@@ -150,42 +150,41 @@
         endif
         fn = regexprep (fn, re, '$2$3');
         info(++cnt).name = fn;
-        if (no_dir && ! strcmp (fn, "."))
-          tmpdir = ".";
-        endif
-        if (! is_same_file (last_dir, tmpdir))
-          ## Caching mechanism to speed up function
-          last_dir = tmpdir;
-          if (ispc () && strncmp (last_dir, '\\', 2))
-            ## Windows UNC network file name is used as is
-            last_absdir = last_dir;
-          else
+        if (nargout > 0)
+          if (no_dir && ! strcmp (fn, "."))
+            tmpdir = ".";
+          endif
+          if (! is_same_file (last_dir, tmpdir))
+            ## Caching mechanism to speed up function
+            last_dir = tmpdir;
             last_absdir = canonicalize_file_name (last_dir);
           endif
+          info(cnt).folder = last_absdir;
+          lt = localtime (st.mtime);
+          info(cnt).date = strftime ("%d-%b-%Y %T", lt);
+          info(cnt).bytes = st.size;
+          info(cnt).isdir = S_ISDIR (st.mode);
+          info(cnt).datenum = [lt.year + 1900, lt.mon + 1, lt.mday, ...
+                               lt.hour, lt.min, lt.sec];
+          info(cnt).statinfo = st;
         endif
-        info(cnt).folder = last_absdir;
-        lt = localtime (st.mtime);
-        info(cnt).date = strftime ("%d-%b-%Y %T", lt);
-        info(cnt).bytes = st.size;
-        info(cnt).isdir = S_ISDIR (st.mode);
-        info(cnt).datenum = [lt.year + 1900, lt.mon + 1, lt.mday, ...
-                             lt.hour, lt.min, lt.sec];
-        info(cnt).statinfo = st;
       endif
     endfor
     info((cnt+1):end) = [];  # remove any unused entries
-    ## A lot of gymnastics in order to call datenum just once.  2x speed up.
-    dvec = [info.datenum]([[1:6:end]', [2:6:end]', [3:6:end]', ...
-                           [4:6:end]', [5:6:end]', [6:6:end]']);
-    dnum = datenum (dvec);
-    ctmp = mat2cell (dnum, ones (cnt,1), 1);
-    [info.datenum] = ctmp{:};
+    if (nargout > 0)
+      ## A lot of gymnastics in order to call datenum just once.  2x speed up.
+      dvec = [info.datenum]([[1:6:end]', [2:6:end]', [3:6:end]', ...
+                             [4:6:end]', [5:6:end]', [6:6:end]']);
+      dnum = datenum (dvec);
+      ctmp = mat2cell (dnum, ones (cnt,1), 1);
+      [info.datenum] = ctmp{:};
+    endif
   endif
 
   ## Return the output arguments.
   if (nargout > 0)
     ## Return the requested structure.
-    retval = info;
+    list = info;
   elseif (numel (info) > 0)
     ## Print the structure to the screen.
     printf ("%s", list_in_columns ({info.name}));
--- a/scripts/miscellaneous/fileattrib.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/miscellaneous/fileattrib.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} fileattrib ()
+## @deftypefn  {} {} fileattrib
+## @deftypefnx {} {} fileattrib @var{file}
 ## @deftypefnx {} {} fileattrib (@var{file})
 ## @deftypefnx {} {[@var{status}, @var{attrib}] =} fileattrib (@dots{})
 ## @deftypefnx {} {[@var{status}, @var{msg}, @var{msgid}] =} fileattrib (@dots{})
--- a/scripts/miscellaneous/grabcode.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/miscellaneous/grabcode.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} grabcode (@var{url})
-## @deftypefnx {} {} grabcode (@var{filename})
+## @deftypefn  {} {} grabcode @var{filename}
+## @deftypefnx {} {} grabcode @var{url}
 ## @deftypefnx {} {@var{code_str} =} grabcode (@dots{})
 ##
 ## Grab the code from a report created by the @code{publish} function.
@@ -35,8 +35,8 @@
 ## The @code{publish} function creates this format automatically.
 ##
 ## If no return value is requested the code is saved to a temporary file and
-## opened in the default editor.  NOTE: The temporary file must be saved under
-## a new or the code will be lost.
+## opened in the default editor.  NOTE: The temporary file must be saved to a
+## new filename or the code will be lost.
 ##
 ## If an output is requested the grabbed code will be returned as string
 ## @var{code_str}.
--- a/scripts/miscellaneous/gunzip.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/miscellaneous/gunzip.m	Mon Aug 29 13:58:00 2022 +0200
@@ -25,34 +25,34 @@
 
 ## -*- texinfo -*-
 ## @deftypefn  {} {} gunzip (@var{gzfile})
-## @deftypefnx {} {} gunzip (@var{gzfile}, @var{dir})
+## @deftypefnx {} {} gunzip (@var{gzfile}, @var{outdir})
 ## @deftypefnx {} {@var{filelist} =} gunzip (@dots{})
 ## Unpack the gzip archive @var{gzfile}.
 ##
 ## If @var{gzfile} is a directory, all gzfiles in the directory will be
 ## recursively unpacked.
 ##
-## If @var{dir} is specified the files are unpacked in this directory rather
+## If @var{outdir} is specified the files are unpacked in this directory rather
 ## than the one where @var{gzfile} is located.
 ##
 ## The optional output @var{filelist} is a list of the uncompressed files.
 ## @seealso{gzip, unpack, bunzip2, unzip, untar}
 ## @end deftypefn
 
-function filelist = gunzip (gzfile, dir = [])
+function filelist = gunzip (gzfile, outdir = [])
 
   if (nargin < 1)
     print_usage ();
   endif
 
-  if (isempty (dir) && ischar (gzfile))
-    dir = fileparts (gzfile);
+  if (isempty (outdir) && ischar (gzfile))
+    outdir = fileparts (gzfile);
   endif
 
   if (nargout > 0)
-    filelist = unpack (gzfile, dir, "gz");
+    filelist = unpack (gzfile, outdir, "gz");
   else
-    unpack (gzfile, dir, "gz");
+    unpack (gzfile, outdir, "gz");
   endif
 
 endfunction
--- a/scripts/miscellaneous/inputname.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/miscellaneous/inputname.m	Mon Aug 29 13:58:00 2022 +0200
@@ -27,8 +27,8 @@
 ## public domain.
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} inputname (@var{n})
-## @deftypefnx {} {} inputname (@var{n}, @var{ids_only})
+## @deftypefn  {} {@var{namestr} =} inputname (@var{n})
+## @deftypefnx {} {@var{namestr} =} inputname (@var{n}, @var{ids_only})
 ## Return the name of the @var{n}-th argument to the calling function.
 ##
 ## If the argument is not a simple variable name, return an empty string.
@@ -59,9 +59,9 @@
 ##
 ##   c = {'a', 'b'}
 ##   y = 1; z = 2;
-##   func (c, y, z)
+##   fcn (c, y, z)
 ##   % inputname() would return 'c', 'y', 'z' for the inputs.
-##   func (c{1}, y, z)
+##   fcn (c{1}, y, z)
 ##   % inputname() would return '', '', '' for the inputs.
 ##
 ## 3) If inputname is not called from a function, Matlab walks up the stack
@@ -73,7 +73,7 @@
 ##   arrayfun (fn, a, 'uniformoutput', false)
 ##   % output is {'fn', 'a', '', ''}
 
-function name = inputname (n, ids_only = true)
+function namestr = inputname (n, ids_only = true)
 
   if (nargin < 1)
     print_usage ();
@@ -84,16 +84,16 @@
   endif
 
   try
-    name = evalin ("caller", sprintf ("__varval__ ('.argn.'){%d}", n));
+    namestr = evalin ("caller", sprintf ("__varval__ ('.argn.'){%d}", n));
   catch
-    name = "";
+    namestr = "";
     return;
   end_try_catch
 
   ## For compatibility with Matlab, return empty string if argument name is
   ## not a valid identifier.
-  if (ids_only && ! isvarname (name))
-    name = "";
+  if (ids_only && ! isvarname (namestr))
+    namestr = "";
   elseif (ids_only)
     ## More complicated checking is required to verify name (bug #59103).
     ## NAME may be text, like "Inf", which is an acceptable variable name
@@ -101,9 +101,9 @@
     ## variable name, rather than a function or IEEE number.
     try
       v = evalin ("caller",
-                  sprintf ("evalin ('caller', '__varval__ (\"%s\")')", name));
+                  sprintf ("evalin ('caller', '__varval__ (\"%s\")')", namestr));
     catch
-      name = "";
+      namestr = "";
     end_try_catch
   endif
 
--- a/scripts/miscellaneous/isdeployed.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/miscellaneous/isdeployed.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} isdeployed ()
+## @deftypefn {} {@var{tf} =} isdeployed ()
 ## Return true if the current program has been compiled and is running
 ## separately from the Octave interpreter and false if it is running in
 ## the Octave interpreter.
@@ -32,8 +32,8 @@
 ## Currently, this function always returns false in Octave.
 ## @end deftypefn
 
-function retval = isdeployed ()
-  retval = false;
+function tf = isdeployed ()
+  tf = false;
 endfunction
 
 
--- a/scripts/miscellaneous/isfolder.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/miscellaneous/isfolder.m	Mon Aug 29 13:58:00 2022 +0200
@@ -33,7 +33,7 @@
 ## is_rooted_relative_filename}
 ## @end deftypefn
 
-function retval = isfolder (f)
+function tf = isfolder (f)
 
   if (nargin < 1)
     print_usage ();
@@ -44,10 +44,10 @@
   endif
 
   f = cellstr (f);
-  retval = false (size (f));
+  tf = false (size (f));
   for i = 1:numel (f)
     [info, err] = stat (f{i});
-    retval(i) = (! err && S_ISDIR (info.mode));
+    tf(i) = (! err && S_ISDIR (info.mode));
   endfor
 
 endfunction
--- a/scripts/miscellaneous/ismac.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/miscellaneous/ismac.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,14 +24,14 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} ismac ()
+## @deftypefn {} {@var{tf} =} ismac ()
 ## Return true if Octave is running on a Mac OS X system and false otherwise.
 ## @seealso{isunix, ispc}
 ## @end deftypefn
 
-function retval = ismac ()
+function tf = ismac ()
 
-  retval = __octave_config_info__ ("mac");
+  tf = __octave_config_info__ ("mac");
 
 endfunction
 
--- a/scripts/miscellaneous/ismethod.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/miscellaneous/ismethod.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,14 +24,14 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} ismethod (@var{obj}, @var{method})
-## @deftypefnx {} {} ismethod (@var{class_name}, @var{method})
+## @deftypefn  {} {@var{tf} =} ismethod (@var{obj}, @var{method})
+## @deftypefnx {} {@var{tf} =} ismethod (@var{class_name}, @var{method})
 ## Return true if the string @var{method} is a valid method of the object
 ## @var{obj} or of the class @var{clsname}.
 ## @seealso{isprop, isobject, isjava, methods}
 ## @end deftypefn
 
-function retval = ismethod (obj, method)
+function tf = ismethod (obj, method)
 
   if (nargin != 2)
     print_usage ();
@@ -47,7 +47,7 @@
 
   method_list = methods (obj);
 
-  retval = ismember (method, method_list);
+  tf = ismember (method, method_list);
 
 endfunction
 
--- a/scripts/miscellaneous/ispc.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/miscellaneous/ispc.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,14 +24,14 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} ispc ()
+## @deftypefn {} {@var{tf} =} ispc ()
 ## Return true if Octave is running on a Windows system and false otherwise.
 ## @seealso{isunix, ismac}
 ## @end deftypefn
 
-function retval = ispc ()
+function tf = ispc ()
 
-  retval = __octave_config_info__ ("windows");
+  tf = __octave_config_info__ ("windows");
 
 endfunction
 
--- a/scripts/miscellaneous/isunix.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/miscellaneous/isunix.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,14 +24,14 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} isunix ()
+## @deftypefn {} {@var{tf} =} isunix ()
 ## Return true if Octave is running on a Unix-like system and false otherwise.
 ## @seealso{ismac, ispc}
 ## @end deftypefn
 
-function retval = isunix ()
+function tf = isunix ()
 
-  retval = __octave_config_info__ ("unix");
+  tf = __octave_config_info__ ("unix");
 
 endfunction
 
--- a/scripts/miscellaneous/license.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/miscellaneous/license.m	Mon Aug 29 13:58:00 2022 +0200
@@ -28,10 +28,11 @@
 ## @deftypefnx {} {} license inuse
 ## @deftypefnx {} {} license inuse @var{feature}
 ## @deftypefnx {} {} license ("inuse")
-## @deftypefnx {} {@var{retval} =} license ("inuse")
-## @deftypefnx {} {@var{retval} =} license ("test", @var{feature})
-## @deftypefnx {} {@var{retval} =} license ("checkout", @var{feature})
-## @deftypefnx {} {[@var{retval}, @var{errmsg}] =} license ("checkout", @var{feature})
+## @deftypefnx {} {@var{license_struct} =} license ("inuse")
+## @deftypefnx {} {@var{license_struct} =} license ("inuse", @var{feature})
+## @deftypefnx {} {@var{status} =} license ("test", @var{feature})
+## @deftypefnx {} {@var{status} =} license ("checkout", @var{feature})
+## @deftypefnx {} {[@var{status}, @var{errmsg}] =} license ("checkout", @var{feature})
 ## Get license information for Octave and Octave packages.
 ##
 ## GNU Octave is free software distributed under the GNU General Public
@@ -41,12 +42,12 @@
 ## When called with no extra input arguments, it returns the Octave license,
 ## otherwise the first input defines the operation mode and must be one of
 ## the following strings: @code{inuse}, @code{test}, and @code{checkout}.
-## The optional @var{feature} argument can either be @qcode{"octave"} (core),
-## or an Octave package.
+## The optional @var{feature} argument can either be @qcode{"octave"} (core)
+## or the name of an Octave package.
 ##
 ## @table @asis
 ## @item @qcode{"inuse"}
-## Returns a list of loaded features, i.e., octave and the list of loaded
+## Print a list of loaded features, i.e., "octave" and the list of loaded
 ## packages.  If an output is requested, it returns a struct array with
 ## the fields @qcode{"feature"}, and @qcode{"user"}.
 ##
@@ -66,11 +67,11 @@
 ## @seealso{pkg, ver, version}
 ## @end deftypefn
 
-function [retval, errmsg] = license (cmd, feature, toggle)
+function [status, errmsg] = license (cmd, feature, toggle)
 
   if (nargin == 0)
     ## then only give information about Octave core
-    retval = "GNU General Public License";
+    status = "GNU General Public License";
     return;
   endif
 
@@ -86,7 +87,7 @@
       if (nargout == 0)
         printf ("%s\n", features{:});
       else
-        retval = struct ("feature", features, "user", get_username ());
+        status = struct ("feature", features, "user", get_username ());
       endif
 
     case "test"
@@ -105,7 +106,7 @@
         endswitch
       endif
 
-      retval = any (strcmp (features, feature));
+      status = any (strcmp (features, feature));
 
     case "checkout"
       ## I guess we could have the checkout command load packages but it's not
@@ -116,10 +117,10 @@
         print_usage ();
       endif
 
-      retval = any (strcmp (features, feature));
+      status = any (strcmp (features, feature));
       errmsg = "";
 
-      if (! retval)
+      if (! status)
         errmsg = ['No package named "' feature '" installed'];
       endif
 
--- a/scripts/miscellaneous/list_primes.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/miscellaneous/list_primes.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,15 +24,15 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} list_primes ()
-## @deftypefnx {} {} list_primes (@var{n})
+## @deftypefn  {} {@var{p} =} list_primes ()
+## @deftypefnx {} {@var{p} =} list_primes (@var{n})
 ## List the first @var{n} primes.
 ##
 ## If @var{n} is unspecified, the first 25 primes are listed.
 ## @seealso{primes, isprime}
 ## @end deftypefn
 
-function retval = list_primes (n = 25)
+function p = list_primes (n = 25)
 
   if (! isreal (n) || ! isscalar (n))
     error ("list_primes: N must be a real scalar");
@@ -41,10 +41,10 @@
   n = floor (n);
 
   if (n < 1)
-    retval = [];
+    p = [];
     return;
   elseif (n == 1)
-    retval = 2;
+    p = 2;
     return;
   endif
 
@@ -54,7 +54,7 @@
     error ("list_primes: Algorithm failed.  Try primes (n*log (6*n))(1:n)");
   endif
 
-  retval = list(1:n);
+  p = list(1:n);
 
 endfunction
 
--- a/scripts/miscellaneous/ls.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/miscellaneous/ls.m	Mon Aug 29 13:58:00 2022 +0200
@@ -58,7 +58,7 @@
 ## @seealso{dir, readdir, glob, what, stat, filesep, ls_command}
 ## @end deftypefn
 
-function retval = ls (varargin)
+function list = ls (varargin)
 
   if (! iscellstr (varargin))
     error ("ls: all arguments must be character strings");
@@ -117,7 +117,7 @@
     elseif (nargout == 0)
       puts (output);
     else
-      retval = strvcat (regexp (output, "[\r\n]+", "split"){:});
+      list = strvcat (regexp (output, "[\r\n]+", "split"){:});
     endif
   else
     ## Just let the output flow if the pager is off.  That way the
--- a/scripts/miscellaneous/mexext.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/miscellaneous/mexext.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,13 +24,17 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} mexext ()
+## @deftypefn {} {@var{ext} =} mexext ()
 ## Return the filename extension used for MEX files.
+##
+## Programming Note: Octave uses the extension @file{mex} for all MEX files
+## regardless of the operating system (Linux, Windows, Apple) or the bit-width
+## (32-bit or 64-bit) of the hardware.
 ## @seealso{mex}
 ## @end deftypefn
 
-function retval = mexext ()
-  retval = "mex";
+function ext = mexext ()
+  ext = "mex";
 endfunction
 
 
--- a/scripts/miscellaneous/module.mk	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/miscellaneous/module.mk	Mon Aug 29 13:58:00 2022 +0200
@@ -94,7 +94,6 @@
   %reldir%/swapbytes.m \
   %reldir%/symvar.m \
   %reldir%/tar.m \
-  %reldir%/tempdir.m \
   %reldir%/unix.m \
   %reldir%/unpack.m \
   %reldir%/untar.m \
--- a/scripts/miscellaneous/movefile.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/miscellaneous/movefile.m	Mon Aug 29 13:58:00 2022 +0200
@@ -30,6 +30,8 @@
 ## @deftypefnx {} {} movefile (@var{f1})
 ## @deftypefnx {} {} movefile (@var{f1}, @var{f2})
 ## @deftypefnx {} {} movefile (@var{f1}, @var{f2}, 'f')
+## @deftypefnx {} {[@var{status}] =} movefile (@dots{})
+## @deftypefnx {} {[@var{status}, @var{msg}] =} movefile (@dots{})
 ## @deftypefnx {} {[@var{status}, @var{msg}, @var{msgid}] =} movefile (@dots{})
 ## Move the source file or directory @var{f1} to the destination @var{f2}.
 ##
--- a/scripts/miscellaneous/namelengthmax.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/miscellaneous/namelengthmax.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} namelengthmax ()
+## @deftypefn {} {@var{n} =} namelengthmax ()
 ## Return the @sc{matlab} compatible maximum variable name length.
 ##
 ## Octave is capable of storing strings up to @math{2^{31} - 1} in length.
--- a/scripts/miscellaneous/nargoutchk.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/miscellaneous/nargoutchk.m	Mon Aug 29 13:58:00 2022 +0200
@@ -49,12 +49,12 @@
 
 function msg = nargoutchk (minargs, maxargs, nargs, outtype)
 
-  ## before matlab's 2011b, nargoutchk would return an error message (just the
+  ## Before Matlab 2011b, nargoutchk would return an error message (just the
   ## message in a string).  With 2011b, it no longer returns anything, it
   ## simply gives an error if the args number is incorrect.
   ## To try to keep compatibility with both versions, check nargout and nargin
-  ## to guess if the caller is expecting a value (old syntax)
-  ## or none (new syntax).
+  ## to guess if the caller is expecting a value (old syntax) or none
+  ## (new syntax).
 
   if (nargout == 1 && (nargin == 3 || nargin == 4))
 
--- a/scripts/miscellaneous/nthargout.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/miscellaneous/nthargout.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,20 +24,20 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} nthargout (@var{n}, @var{func}, @dots{})
-## @deftypefnx {} {} nthargout (@var{n}, @var{ntot}, @var{func}, @dots{})
+## @deftypefn  {} {@var{arg} =} nthargout (@var{n}, @var{fcn}, @dots{})
+## @deftypefnx {} {@var{arg} =} nthargout (@var{n}, @var{ntot}, @var{fcn}, @dots{})
 ## Return the @var{n}th output argument of the function specified by the
-## function handle or string @var{func}.
+## function handle or string @var{fcn}.
 ##
-## Any additional arguments are passed directly to @var{func}.  The total
-## number of arguments to call @var{func} with can be passed in @var{ntot}; by
+## Any additional arguments are passed directly to @var{fcn}.  The total
+## number of arguments to call @var{fcn} with can be passed in @var{ntot}; by
 ## default @var{ntot} is @var{n}.  The input @var{n} can also be a vector of
 ## indices of the output, in which case the output will be a cell array of the
 ## requested output arguments.
 ##
-## The intended use @code{nthargout} is to avoid intermediate variables.  For
-## example, when finding the indices of the maximum entry of a matrix, the
-## following two compositions of nthargout
+## The intended use of @code{nthargout} is to avoid intermediate variables.
+## For  example, when finding the indices of the maximum entry of a matrix, the
+## following two compositions of @code{nthargout}
 ##
 ## @example
 ## @group
@@ -61,8 +61,8 @@
 ## @end group
 ## @end example
 ##
-## It can also be helpful to have all output arguments in a single cell in the
-## following manner:
+## It can also be helpful to have all output arguments collected in a single
+## cell array as the following code demonstrates:
 ##
 ## @example
 ## @var{USV} = nthargout ([1:3], @@svd, hilb (5));
@@ -71,7 +71,7 @@
 ## @seealso{nargin, nargout, varargin, varargout, isargout}
 ## @end deftypefn
 
-function out = nthargout (n, varargin)
+function arg = nthargout (n, varargin)
 
   if (nargin < 2)
     print_usage ();
@@ -79,12 +79,12 @@
 
   if (is_function_handle (varargin{1}) || ischar (varargin{1}))
     ntot = max (n(:));
-    func = varargin{1};
+    fcn = varargin{1};
     args = varargin(2:end);
   elseif (isnumeric (varargin{1})
           && (is_function_handle (varargin{2}) || ischar (varargin{2})))
     ntot = varargin{1};
-    func = varargin{2};
+    fcn = varargin{2};
     args = varargin(3:end);
   else
     print_usage ();
@@ -97,11 +97,11 @@
   outargs = cell (1, ntot);
 
   try
-    [outargs{:}] = feval (func, args{:});
+    [outargs{:}] = feval (fcn, args{:});
     if (numel (n) > 1)
-      out = outargs(n);
+      arg = outargs(n);
     else
-      out = outargs{n};
+      arg = outargs{n};
     endif
   catch
     err = lasterr ();
--- a/scripts/miscellaneous/perl.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/miscellaneous/perl.m	Mon Aug 29 13:58:00 2022 +0200
@@ -36,27 +36,32 @@
 ## @seealso{system, python}
 ## @end deftypefn
 
-function [output, status] = perl (scriptfile = "-e ''", varargin)
+function [output, status] = perl (scriptfile, varargin)
 
-  ## VARARGIN is initialized to {}(1x0) if no additional arguments are
-  ## supplied, so there is no need to check for it, or provide an
-  ## initial value in the argument list of the function definition.
+  if (nargin < 1)
+    print_usage ();
+  endif
 
-  if (ischar (scriptfile)
-      && (   (nargin == 1 && ! isempty (scriptfile))
-          || (nargin != 1 && iscellstr (varargin))))
-    if (! strcmp (scriptfile(1:2), "-e"))
-      ## Attempt to find file in loadpath.  No effect for absolute filenames.
-      scriptfile = file_in_loadpath (scriptfile);
-    endif
+  if (! ischar (scriptfile) || isempty (scriptfile))
+    error ("perl: SCRIPTFILE must be a non-empty string");
+  endif
+  if (nargin > 1 && ! iscellstr (varargin))
+    error ("perl: ARGUMENTS must be strings");
+  endif
 
-    [status, output] = system (["perl " scriptfile ...
-                                sprintf(" %s", varargin{:})]);
-  else
-    error ("perl: invalid arguments");
+  if (numel (scriptfile) < 2 || ! strcmp (scriptfile(1:2), "-e"))
+    ## Attempt to find file in loadpath.  No effect for absolute filenames.
+    scriptfile = file_in_loadpath (scriptfile);
   endif
 
+  [status, output] = system (["perl " scriptfile ...
+                              sprintf(" %s", varargin{:})]);
+
 endfunction
 
 
-%!error <invalid arguments> perl (123)
+## Test input validation
+%!error <Invalid call> perl ()
+%!error <SCRIPTFILE must be a non-empty string> perl (123)
+%!error <SCRIPTFILE must be a non-empty string> perl ("")
+%!error <ARGUMENTS must be strings> perl ("perlfile", 123)
--- a/scripts/miscellaneous/private/display_info_file.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/miscellaneous/private/display_info_file.m	Mon Aug 29 13:58:00 2022 +0200
@@ -26,10 +26,10 @@
 ## news() and citation() are very much alike.  They both do the same thing,
 ## just for different files.  This function does all the work.
 
-function display_info_file (func, package, file)
+function display_info_file (fcn, package, file)
 
   if (! ischar (package))
-    error ("%s: PACKAGE must be a string", func);
+    error ("%s: PACKAGE must be a string", fcn);
   endif
 
   if (strcmpi (package, "octave"))
@@ -40,16 +40,16 @@
     names     = cellfun (@(x) x.name, installed, "UniformOutput", false);
     pos       = strcmpi (names, package);
     if (! any (pos))
-      error ("%s: package '%s' is not installed", func, package);
+      error ("%s: package '%s' is not installed", fcn, package);
     endif
     filepath = fullfile (installed{pos}.dir, "packinfo", file);
   endif
 
   if (! exist (filepath, "file"))
     if (strcmpi (package, "octave"))
-      error ("%s: broken installation -- unable to locate %s file", func, file);
+      error ("%s: broken installation -- unable to locate %s file", fcn, file);
     else
-      error ("%s: unable to locate %s file for package %s", func, file, package);
+      error ("%s: unable to locate %s file for package %s", fcn, file, package);
     endif
   endif
 
--- a/scripts/miscellaneous/python.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/miscellaneous/python.m	Mon Aug 29 13:58:00 2022 +0200
@@ -33,26 +33,58 @@
 ## Return output in @var{output} and optional status in @var{status}.  If
 ## @var{scriptfile} is not an absolute filename it is searched for in the
 ## current directory and then in the Octave loadpath.
+##
+## Programming Note: On UNIX systems, the script will be executed by
+## @command{python3} and on Windows by @command{python}.  You can override
+## these defaults by setting the @env{PYTHON} environment variable, for example
+## from within Octave using @code{setenv PYTHON /usr/local/bin/python3}.
+##
 ## @seealso{system, perl}
 ## @end deftypefn
 
-function [output, status] = python (scriptfile = "-c ''", varargin)
+function [output, status] = python (scriptfile, varargin)
+
+  persistent pyexec = get_python_executable ();
+
+  if (nargin < 1)
+    print_usage ();
+  endif
 
-  if (ischar (scriptfile)
-      && (   (nargin == 1 && ! isempty (scriptfile))
-          || (nargin != 1 && iscellstr (varargin))))
-    if (! strcmp (scriptfile(1:2), "-c"))
+  if (! ischar (scriptfile) || isempty (scriptfile))
+    error ("python: SCRIPTFILE must be a non-empty string");
+  endif
+  if (nargin > 1 && ! iscellstr (varargin))
+    error ("python: ARGUMENTS must be strings");
+  endif
+
+  if (numel (scriptfile) < 2 || ! strcmp (scriptfile(1:2), "-c"))
       ## Attempt to find file in loadpath.  No effect for absolute filenames.
       scriptfile = file_in_loadpath (scriptfile);
     endif
 
-    [status, output] = system (["python ", scriptfile, ...
-                                sprintf(" %s", varargin{:})]);
-  else
-    error ("python: invalid arguments");
+  [status, output] = system ([pyexec " " scriptfile, ...
+                              sprintf(" %s", varargin{:})]);
+
+endfunction
+
+function pyexec = get_python_executable ()
+
+  pyexec = getenv ("PYTHON");
+  if (isempty (pyexec))
+    ## PEP394 says Python 3 installs should all provide this command
+    pyexec = "python3";
+
+    if (ispc () && (! isunix ()))
+      ## 2020-03: Python.org installer/Anaconda do not provide python3
+      pyexec = "python";
+    endif
   endif
 
 endfunction
 
 
-%!error <invalid arguments> python (123)
+## Test input validation
+%!error <Invalid call> python ()
+%!error <SCRIPTFILE must be a non-empty string> python (123)
+%!error <SCRIPTFILE must be a non-empty string> python ("")
+%!error <ARGUMENTS must be strings> python ("pythonfile", 123)
--- a/scripts/miscellaneous/substruct.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/miscellaneous/substruct.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} substruct (@var{type}, @var{subs}, @dots{})
+## @deftypefn {} {@var{s} =} substruct (@var{type}, @var{subs}, @dots{})
 ## Create a subscript structure for use with @code{subsref} or @code{subsasgn}.
 ##
 ## For example:
@@ -50,7 +50,7 @@
 ## @seealso{subsref, subsasgn}
 ## @end deftypefn
 
-function retval = substruct (varargin)
+function s = substruct (varargin)
 
   if (nargin < 2 || mod (nargin, 2) != 0)
     print_usage ();
@@ -72,7 +72,7 @@
     error ('substruct: TYPE must be one of "()", "{}", or ""');
   endif
 
-  retval = struct ("type", typ, "subs", sub);
+  s = struct ("type", typ, "subs", sub);
 
 endfunction
 
--- a/scripts/miscellaneous/swapbytes.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/miscellaneous/swapbytes.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} swapbytes (@var{x})
+## @deftypefn {} {@var{y} =} swapbytes (@var{x})
 ## Swap the byte order on values, converting from little endian to big endian
 ## and vice versa.
 ##
--- a/scripts/miscellaneous/tempdir.m	Sun Aug 28 22:44:49 2022 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,70 +0,0 @@
-########################################################################
-##
-## Copyright (C) 2003-2022 The Octave Project Developers
-##
-## See the file COPYRIGHT.md in the top-level directory of this
-## distribution or <https://octave.org/copyright/>.
-##
-## This file is part of Octave.
-##
-## Octave is free software: you can redistribute it and/or modify it
-## under the terms of the GNU General Public License as published by
-## the Free Software Foundation, either version 3 of the License, or
-## (at your option) any later version.
-##
-## Octave is distributed in the hope that it will be useful, but
-## WITHOUT ANY WARRANTY; without even the implied warranty of
-## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-## GNU General Public License for more details.
-##
-## You should have received a copy of the GNU General Public License
-## along with Octave; see the file COPYING.  If not, see
-## <https://www.gnu.org/licenses/>.
-##
-########################################################################
-
-## -*- texinfo -*-
-## @deftypefn {} {@var{dir} =} tempdir ()
-## Return the name of the host system's directory for temporary files.
-##
-## The directory name is taken first from the environment variable
-## @env{TMPDIR}.  If that does not exist the system default returned by
-## @code{P_tmpdir} is used.
-## @seealso{P_tmpdir, tempname, mkstemp, tmpfile}
-## @end deftypefn
-
-function dirname = tempdir ()
-
-  dirname = getenv ("TMPDIR");
-  if (isempty (dirname))
-    dirname = P_tmpdir ();
-  endif
-
-  if (! strcmp (dirname(end), filesep))
-    dirname = [dirname filesep];
-  endif
-
-  if (! isfolder (dirname))
-    warning ("tempdir: '%s' does not exist or is not a directory", dirname);
-  endif
-
-endfunction
-
-
-%!assert (ischar (tempdir ()))
-
-%!test
-%! old_wstate = warning ("query");
-%! warning ("off");
-%! old_tmpdir = getenv ("TMPDIR");
-%! unwind_protect
-%!   setenv ("TMPDIR", "__MY_TMP_DIR__");
-%!   assert (tempdir (), ["__MY_TMP_DIR__" filesep()]);
-%! unwind_protect_cleanup
-%!   if (! isempty (old_tmpdir))
-%!     setenv ("TMPDIR", old_tmpdir);
-%!   else
-%!     unsetenv ("TMPDIR");
-%!   endif
-%!   warning (old_wstate);
-%! end_unwind_protect
--- a/scripts/miscellaneous/ver.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/miscellaneous/ver.m	Mon Aug 29 13:58:00 2022 +0200
@@ -56,7 +56,7 @@
 ## @seealso{version, usejava, pkg}
 ## @end deftypefn
 
-function retval = ver (package = "")
+function v = ver (package = "")
 
   if (nargout == 0)
     hg_id = __octave_config_info__ ("hg_id");
@@ -91,24 +91,24 @@
     if (isempty (package))
       ## Start with the version info for Octave
       [octver, octdate] = version ();
-      retval = struct ("Name", "Octave", "Version", octver,
-                       "Release", [], "Date", octdate);
+      v = struct ("Name", "Octave", "Version", octver,
+                  "Release", [], "Date", octdate);
       lst = pkg ("list");
       for i = 1:numel (lst)
-        retval(end+1) = struct ("Name", lst{i}.name, "Version", lst{i}.version,
-                                "Release", [], "Date", lst{i}.date);
+        v(end+1) = struct ("Name", lst{i}.name, "Version", lst{i}.version,
+                           "Release", [], "Date", lst{i}.date);
       endfor
     elseif (strcmpi (package, "Octave"))
       [octver, octdate] = version ();
-      retval = struct ("Name", "Octave", "Version", octver,
-                       "Release", [], "Date", octdate);
+      v = struct ("Name", "Octave", "Version", octver,
+                  "Release", [], "Date", octdate);
     else
       lst = pkg ("list", package);
       if (isempty (lst))
-        retval = struct ("Name", {}, "Version", {}, "Release", {}, "Date", {});
+        v = struct ("Name", {}, "Version", {}, "Release", {}, "Date", {});
       else
-        retval = struct ("Name", lst{1}.name, "Version", lst{1}.version,
-                         "Release", [], "Date", lst{1}.date);
+        v = struct ("Name", lst{1}.name, "Version", lst{1}.version,
+                    "Release", [], "Date", lst{1}.date);
       endif
     endif
   endif
--- a/scripts/miscellaneous/verLessThan.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/miscellaneous/verLessThan.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} verLessThan (@var{package}, @var{version})
+## @deftypefn {} {@var{tf} =} verLessThan (@var{package}, @var{version})
 ## Return true if the installed version of the package is less than
 ## @var{version}.
 ##
@@ -56,7 +56,7 @@
 ## @seealso{compare_versions, version, ver, pkg}
 ## @end deftypefn
 
-function retval = verLessThan (package, version)
+function tf = verLessThan (package, version)
 
   if (nargin != 2)
     print_usage ();
@@ -72,7 +72,7 @@
     error ('verLessThan: package "%s" is not installed', package);
   endif
 
-  retval = compare_versions (v(idx).Version, version, "<");
+  tf = compare_versions (v(idx).Version, version, "<");
 
 endfunction
 
--- a/scripts/miscellaneous/what.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/miscellaneous/what.m	Mon Aug 29 13:58:00 2022 +0200
@@ -71,7 +71,7 @@
 ## @seealso{which, ls, exist}
 ## @end deftypefn
 
-function retval = what (dir)
+function w = what (dir)
 
   if (nargin == 0)
     dir = { pwd() };
@@ -98,26 +98,26 @@
 
    ## Lookup info for each directory
    for i = 1 : numel (dir)
-     w(i) = __what__ (dir{i});
+     ws(i) = __what__ (dir{i});
    endfor
 
    ## If none was found, return an empty struct
    if (numel (dir) == 0)
-     w = __what__ ("");
-     w = resize (w, [0, 1]);  # Matlab compatibility, return 0x1 empty array
+     ws = __what__ ("");
+     ws = resize (ws, [0, 1]);  # Matlab compatibility, return 0x1 empty array
    endif
 
   if (nargout == 0)
-    for i = 1 : numel (w)
-      __print_fnames__ ("M-files in directory", w(i).path, w(i).m);
-      __print_fnames__ ("\nMAT-files in directory", w(i).path, w(i).mat);
-      __print_fnames__ ("\nMEX-files in directory", w(i).path, w(i).mex);
-      __print_fnames__ ("\nOCT-files in directory", w(i).path, w(i).oct);
-      __print_fnames__ ("\nClasses in directory", w(i).path, w(i).classes);
-      __print_fnames__ ("\nPackages in directory", w(i).path, w(i).packages);
+    for i = 1 : numel (ws)
+      __print_fnames__ ("M-files in directory", ws(i).path, ws(i).m);
+      __print_fnames__ ("\nMAT-files in directory", ws(i).path, ws(i).mat);
+      __print_fnames__ ("\nMEX-files in directory", ws(i).path, ws(i).mex);
+      __print_fnames__ ("\nOCT-files in directory", ws(i).path, ws(i).oct);
+      __print_fnames__ ("\nClasses in directory", ws(i).path, ws(i).classes);
+      __print_fnames__ ("\nPackages in directory", ws(i).path, ws(i).packages);
     endfor
   else
-    retval = w;
+    w = ws;
   endif
 
 endfunction
--- a/scripts/ode/decic.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/ode/decic.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {[@var{y0_new}, @var{yp0_new}] =} decic (@var{fun}, @var{t0}, @var{y0}, @var{fixed_y0}, @var{yp0}, @var{fixed_yp0})
-## @deftypefnx {} {[@var{y0_new}, @var{yp0_new}] =} decic (@var{fun}, @var{t0}, @var{y0}, @var{fixed_y0}, @var{yp0}, @var{fixed_yp0}, @var{options})
+## @deftypefn  {} {[@var{y0_new}, @var{yp0_new}] =} decic (@var{fcn}, @var{t0}, @var{y0}, @var{fixed_y0}, @var{yp0}, @var{fixed_yp0})
+## @deftypefnx {} {[@var{y0_new}, @var{yp0_new}] =} decic (@var{fcn}, @var{t0}, @var{y0}, @var{fixed_y0}, @var{yp0}, @var{fixed_yp0}, @var{options})
 ## @deftypefnx {} {[@var{y0_new}, @var{yp0_new}, @var{resnorm}] =} decic (@dots{})
 ##
 ## Compute consistent implicit ODE initial conditions @var{y0_new} and
@@ -34,12 +34,12 @@
 ## A maximum of @code{length (@var{y0})} components between @var{fixed_y0} and
 ## @var{fixed_yp0} may be chosen as fixed values.
 ##
-## @var{fun} is a function handle.  The function must accept three inputs where
+## @var{fcn} is a function handle.  The function must accept three inputs where
 ## the first is time @var{t}, the second is a column vector of unknowns
 ## @var{y}, and the third is a column vector of unknowns @var{yp}.
 ##
 ## @var{t0} is the initial time such that
-## @code{@var{fun}(@var{t0}, @var{y0_new}, @var{yp0_new}) = 0}, specified as a
+## @code{@var{fcn}(@var{t0}, @var{y0_new}, @var{yp0_new}) = 0}, specified as a
 ## scalar.
 ##
 ## @var{y0} is a vector used as the initial guess for @var{y}.
@@ -93,7 +93,7 @@
 ## @seealso{ode15i, odeset}
 ## @end deftypefn
 
-function [y0_new, yp0_new, resnorm] = decic (fun, t0,
+function [y0_new, yp0_new, resnorm] = decic (fcn, t0,
                                              y0, fixed_y0, yp0, fixed_yp0,
                                              options)
 
@@ -102,9 +102,9 @@
   endif
 
   ## Validate inputs
-  if (! is_function_handle (fun))
+  if (! is_function_handle (fcn))
     error ("Octave:invalid-input-arg",
-           "decic: FUN must be a valid function handle");
+           "decic: FCN must be a valid function handle");
   endif
 
   if (! (isnumeric (t0) && isscalar (t0)))
@@ -171,7 +171,7 @@
   x0 = [y0(! fixed_y0); yp0(! fixed_yp0)];
   opt = optimset ("tolfun", TolFun, "tolx", TolX, "FinDiffType", "central");
   x = ...
-    fminunc (@(x) objective (x, t0, y0, fixed_y0, yp0, fixed_yp0, nl, nu, fun),
+    fminunc (@(x) objective (x, t0, y0, fixed_y0, yp0, fixed_yp0, nl, nu, fcn),
              x0, opt);
 
   y0_new  = y0;
@@ -180,18 +180,18 @@
   y0_new(! fixed_y0)   = x(1:nl);
   yp0_new(! fixed_yp0) = x(nl+1:nl+nu);
   if (isargout (3))
-    resnorm = fun (t0, y0_new, yp0_new);
+    resnorm = fcn (t0, y0_new, yp0_new);
   endif
 
 endfunction
 
-function res = objective (x, t0, y0, fixed_y0, yp0, fixed_yp0, nl, nu, fun)
+function res = objective (x, t0, y0, fixed_y0, yp0, fixed_yp0, nl, nu, fcn)
 
   y = y0;
   y(! fixed_y0) = x(1:nl);
   yp = yp0;
   yp(! fixed_yp0) = x(nl+1:nl+nu);
-  res = sqrt (sum (fun (t0, y, yp) .^ 2));
+  res = sqrt (sum (fcn (t0, y, yp) .^ 2));
 
 endfunction
 
@@ -221,7 +221,7 @@
 %!error <Invalid call> decic (1,2,3)
 %!error <Invalid call> decic (1,2,3,4)
 %!error <Invalid call> decic (1,2,3,4,5)
-%!error <FUN must be a valid function handle>
+%!error <FCN must be a valid function handle>
 %! decic (1, 0, [1; 0; 0], [1; 1; 0], [-1e-4; 1; 0], [0; 0; 0]);
 %!error <T0 must be a numeric scalar>
 %! decic (@rob, [1, 1], [1; 0; 0], [1; 1; 0], [-1e-4; 1; 0], [0; 0; 0]);
--- a/scripts/ode/ode15i.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/ode/ode15i.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {[@var{t}, @var{y}] =} ode15i (@var{fun}, @var{trange}, @var{y0}, @var{yp0})
-## @deftypefnx {} {[@var{t}, @var{y}] =} ode15i (@var{fun}, @var{trange}, @var{y0}, @var{yp0}, @var{ode_opt})
+## @deftypefn  {} {[@var{t}, @var{y}] =} ode15i (@var{fcn}, @var{trange}, @var{y0}, @var{yp0})
+## @deftypefnx {} {[@var{t}, @var{y}] =} ode15i (@var{fcn}, @var{trange}, @var{y0}, @var{yp0}, @var{ode_opt})
 ## @deftypefnx {} {[@var{t}, @var{y}, @var{te}, @var{ye}, @var{ie}] =} ode15i (@dots{})
 ## @deftypefnx {} {@var{solution} =} ode15i (@dots{})
 ## @deftypefnx {} {} ode15i (@dots{})
@@ -35,7 +35,7 @@
 ## @code{ode15i} uses a variable step, variable order BDF (Backward
 ## Differentiation Formula) method that ranges from order 1 to 5.
 ##
-## @var{fun} is a function handle, inline function, or string containing the
+## @var{fcn} is a function handle, inline function, or string containing the
 ## name of the function that defines the ODE: @code{0 = f(t,y,yp)}.  The
 ## function must accept three inputs where the first is time @var{t}, the
 ## second is the function value @var{y} (a column vector), and the third
@@ -96,7 +96,7 @@
 ## @seealso{decic, odeset, odeget}
 ## @end deftypefn
 
-function varargout = ode15i (fun, trange, y0, yp0, varargin)
+function varargout = ode15i (fcn, trange, y0, yp0, varargin)
 
   if (nargin < 4)
     print_usage ();
@@ -112,8 +112,8 @@
    options = odeset ();
   endif
 
-  ## Check fun, trange, y0, yp0
-  fun = check_default_input (fun, trange, solver, y0, yp0);
+  ## Check fcn, trange, y0, yp0
+  fcn = check_default_input (fcn, trange, solver, y0, yp0);
 
   if (! isempty (options.Jacobian))
     if (ischar (options.Jacobian))
@@ -172,7 +172,7 @@
   ## Jacobian
   options.havejac       = false;
   options.havejacsparse = false;
-  options.havejacfun    = false;
+  options.havejacfcn    = false;
 
   if (! isempty (options.Jacobian))
     options.havejac = true;
@@ -196,7 +196,7 @@
       endif
 
     elseif (is_function_handle (options.Jacobian))
-      options.havejacfun = true;
+      options.havejacfcn = true;
       if (nargin (options.Jacobian) == 3)
         [J1, J2] = options.Jacobian (trange(1), y0, yp0);
 
@@ -208,7 +208,7 @@
                  'ode15i: "Jacobian" function must evaluate to a real square matrix');
         endif
         if (issparse (J1) && issparse (J2))
-          options.havejacsparse = true;  # Jac is sparse fun
+          options.havejacsparse = true;  # Jac is sparse fcn
         endif
       else
         error ("Octave:invalid-input-arg",
@@ -256,7 +256,7 @@
   options.haveeventfunction = ! isempty (options.Events);
 
   ## 3 arguments in the event callback of ode15i
-  [t, y, te, ye, ie] = __ode15__ (fun, trange, y0, yp0, options, 3);
+  [t, y, te, ye, ie] = __ode15__ (fcn, trange, y0, yp0, options, 3);
 
   if (nargout == 2)
     varargout{1} = t;
@@ -286,7 +286,7 @@
 
 %!demo
 %! ## Solve Robertson's equations with ode15i
-%! fun = @(t, y, yp) [-(yp(1) + 0.04*y(1) - 1e4*y(2)*y(3));
+%! fcn = @(t, y, yp) [-(yp(1) + 0.04*y(1) - 1e4*y(2)*y(3));
 %!                    -(yp(2) - 0.04*y(1) + 1e4*y(2)*y(3) + 3e7*y(2)^2);
 %!                    y(1) + y(2) + y(3) - 1];
 %!
@@ -295,7 +295,7 @@
 %! yp0 = [-1e-4; 1e-4; 0];
 %! tspan = [0 4*logspace(-6, 6)];
 %!
-%! [t, y] = ode15i (fun, tspan, y0, yp0, opt);
+%! [t, y] = ode15i (fcn, tspan, y0, yp0, opt);
 %!
 %! y(:,2) = 1e4 * y(:, 2);
 %! figure (2);
@@ -442,19 +442,19 @@
 %! [t, y] = ode15i (@rob, [0, 100], [1; 0; 0], [-1e-4; 1e-4; 0], opt);
 %! assert ([t(end), y(end,:)], fref, 1e-3);
 
-## Jacobian fun dense
+## Jacobian fcn dense
 %!testif HAVE_SUNDIALS
 %! opt = odeset ("Jacobian", @jacfundense);
 %! [t, y] = ode15i (@rob, [0, 100], [1; 0; 0], [-1e-4; 1e-4; 0], opt);
 %! assert ([t(end), y(end,:)], fref, 1e-3);
 
-## Jacobian fun dense as string
+## Jacobian fcn dense as string
 %!testif HAVE_SUNDIALS
 %! opt = odeset ("Jacobian", "jacfundense");
 %! [t, y] = ode15i (@rob, [0, 100], [1; 0; 0], [-1e-4; 1e-4; 0], opt);
 %! assert ([t(end), y(end,:)], fref, 1e-3);
 
-## Jacobian fun sparse
+## Jacobian fcn sparse
 %!testif HAVE_SUNDIALS_SUNLINSOL_KLU
 %! opt = odeset ("Jacobian", @jacfunsparse, "AbsTol", 1e-7, "RelTol", 1e-7);
 %! [t, y] = ode15i (@rob, [0, 100], [1; 0; 0], [-1e-4; 1e-4; 0], opt);
@@ -532,7 +532,7 @@
 %! [0, 1], [1, 1], [1; 1]);
 %! assert (size (yout), [20, 2]);
 
-## Jacobian fun wrong dimension
+## Jacobian fcn wrong dimension
 %!testif HAVE_SUNDIALS
 %! opt = odeset ("Jacobian", @jacwrong);
 %! fail ("[t, y] = ode15i (@rob, [0, 4e6], [1; 0; 0], [-1e-4; 1e-4; 0], opt)",
@@ -585,7 +585,7 @@
 %! fail ("[t, y] = ode15i (@rob, [0, 4e6], [1; 0; 0], [-1e-4; 1e-4; 0], opt)",
 %!       '"Jacobian" function "_5yVNhWVJWJn47RKnzxPsyb_" not found');
 
-%!function ydot = fun (t, y, yp)
+%!function ydot = fcn (t, y, yp)
 %!  ydot = [y - yp];
 %!endfunction
 
@@ -602,54 +602,54 @@
 %! fail ("ode15i (1, 1, 1)", "Invalid call to ode15i");
 
 %!testif HAVE_SUNDIALS
-%! fail ("ode15i (1, 1, 1, 1)", "ode15i: fun must be of class:");
+%! fail ("ode15i (1, 1, 1, 1)", "ode15i: fcn must be of class:");
 
 %!testif HAVE_SUNDIALS
-%! fail ("ode15i (1, 1, 1, 1, 1)", "ode15i: fun must be of class:");
+%! fail ("ode15i (1, 1, 1, 1, 1)", "ode15i: fcn must be of class:");
 
 %!testif HAVE_SUNDIALS
-%! fail ("ode15i (1, 1, 1, 1, 1, 1)", "ode15i: fun must be of class:");
+%! fail ("ode15i (1, 1, 1, 1, 1, 1)", "ode15i: fcn must be of class:");
 
 %!testif HAVE_SUNDIALS
-%! fail ("ode15i (@fun, 1, 1, 1)",
+%! fail ("ode15i (@fcn, 1, 1, 1)",
 %!       "ode15i: invalid value assigned to field 'trange'");
 
 %!testif HAVE_SUNDIALS
-%! fail ("ode15i (@fun, [1, 1], 1, 1)",
+%! fail ("ode15i (@fcn, [1, 1], 1, 1)",
 %!       "ode15i: invalid value assigned to field 'trange'");
 
 %!testif HAVE_SUNDIALS
-%! fail ("ode15i (@fun, [1, 2], 1, [1, 2])",
+%! fail ("ode15i (@fcn, [1, 2], 1, [1, 2])",
 %!       "ode15i: y0 must have 2 elements");
 
 %!testif HAVE_SUNDIALS
 %! opt = odeset ("RelTol", "_5yVNhWVJWJn47RKnzxPsyb_");
-%! fail ("[t, y] = ode15i (@fun, [0, 2], 2, 2, opt)",
+%! fail ("[t, y] = ode15i (@fcn, [0, 2], 2, 2, opt)",
 %!       "ode15i: RelTol must be of class:");
 
 %!testif HAVE_SUNDIALS
 %! opt = odeset ("RelTol", [1, 2]);
-%! fail ("[t, y] = ode15i (@fun, [0, 2], 2, 2, opt)",
+%! fail ("[t, y] = ode15i (@fcn, [0, 2], 2, 2, opt)",
 %!       "ode15i: RelTol must be scalar");
 
 %!testif HAVE_SUNDIALS
 %! opt = odeset ("RelTol", -2);
-%! fail ("[t, y] = ode15i (@fun, [0, 2], 2, 2, opt)",
+%! fail ("[t, y] = ode15i (@fcn, [0, 2], 2, 2, opt)",
 %!       "ode15i: RelTol must be positive");
 
 %!testif HAVE_SUNDIALS
 %! opt = odeset ("AbsTol", "_5yVNhWVJWJn47RKnzxPsyb_");
-%! fail ("[t, y] = ode15i (@fun, [0, 2], 2, 2, opt)",
+%! fail ("[t, y] = ode15i (@fcn, [0, 2], 2, 2, opt)",
 %!       "ode15i: AbsTol must be of class:");
 
 %!testif HAVE_SUNDIALS
 %! opt = odeset ("AbsTol", -1);
-%! fail ("[t, y] = ode15i (@fun, [0, 2], 2, 2, opt)",
+%! fail ("[t, y] = ode15i (@fcn, [0, 2], 2, 2, opt)",
 %!       "ode15i: AbsTol must be positive");
 
 %!testif HAVE_SUNDIALS
 %! opt = odeset ("AbsTol", [1, 1, 1]);
-%! fail ("[t, y] = ode15i (@fun, [0, 2], 2, 2, opt)",
+%! fail ("[t, y] = ode15i (@fcn, [0, 2], 2, 2, opt)",
 %!       'ode15i: invalid value assigned to field "AbsTol"');
 
 %!testif HAVE_SUNDIALS
--- a/scripts/ode/ode15s.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/ode/ode15s.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {[@var{t}, @var{y}] =} ode15s (@var{fun}, @var{trange}, @var{y0})
-## @deftypefnx {} {[@var{t}, @var{y}] =} ode15s (@var{fun}, @var{trange}, @var{y0}, @var{ode_opt})
+## @deftypefn  {} {[@var{t}, @var{y}] =} ode15s (@var{fcn}, @var{trange}, @var{y0})
+## @deftypefnx {} {[@var{t}, @var{y}] =} ode15s (@var{fcn}, @var{trange}, @var{y0}, @var{ode_opt})
 ## @deftypefnx {} {[@var{t}, @var{y}, @var{te}, @var{ye}, @var{ie}] =} ode15s (@dots{})
 ## @deftypefnx {} {@var{solution} =} ode15s (@dots{})
 ## @deftypefnx {} {} ode15s (@dots{})
@@ -35,7 +35,7 @@
 ## @code{ode15s} uses a variable step, variable order BDF (Backward
 ## Differentiation Formula) method that ranges from order 1 to 5.
 ##
-## @var{fun} is a function handle, inline function, or string containing the
+## @var{fcn} is a function handle, inline function, or string containing the
 ## name of the function that defines the ODE: @code{y' = f(t,y)}.  The function
 ## must accept two inputs where the first is time @var{t} and the second is a
 ## column vector of unknowns @var{y}.
@@ -91,15 +91,15 @@
 ## @seealso{decic, odeset, odeget, ode23, ode45}
 ## @end deftypefn
 
-function varargout = ode15s (fun, trange, y0, varargin)
+function varargout = ode15s (fcn, trange, y0, varargin)
 
   if (nargin < 3)
     print_usage ();
   endif
 
   solver = "ode15s";
-  ## Check fun, trange, y0, yp0
-  fun = check_default_input (fun, trange, solver, y0);
+  ## Check fcn, trange, y0, yp0
+  fcn = check_default_input (fcn, trange, solver, y0);
 
   n = numel (y0);
 
@@ -175,14 +175,14 @@
                           classes, attributes, solver);
 
   ## Mass
-  options.havemassfun    = false;
+  options.havemassfcn    = false;
   options.havestatedep   = false;
   options.havetimedep    = false;
   options.havemasssparse = false;
 
   if (! isempty (options.Mass))
     if (is_function_handle (options.Mass))
-      options.havemassfun = true;
+      options.havemassfcn = true;
       if (nargin (options.Mass) == 2)
         options.havestatedep = true;
         M = options.Mass (trange(1), y0);
@@ -216,19 +216,19 @@
   ## Jacobian
   options.havejac       = false;
   options.havejacsparse = false;
-  options.havejacfun    = false;
+  options.havejacfcn    = false;
 
   if (! isempty (options.Jacobian))
     options.havejac = true;
     if (is_function_handle (options.Jacobian))
-      options.havejacfun = true;
+      options.havejacfcn = true;
       if (nargin (options.Jacobian) == 2)
         A = options.Jacobian (trange(1), y0);
         if (! issquare (A) || rows (A) != n || ! isnumeric (A) || ! isreal (A))
           error ("Octave:invalid-input-arg",
                  'ode15s: "Jacobian" function must evaluate to a real square matrix');
         endif
-        options.havejacsparse = issparse (A);  # Jac is sparse fun
+        options.havejacsparse = issparse (A);  # Jac is sparse fcn
       else
         error ("Octave:invalid-input-arg",
                'ode15s: invalid value assigned to field "Jacobian"');
@@ -261,15 +261,15 @@
     options.havejacsparse = false;
   endif
 
-  ## If Mass or Jacobian is fun, then new Jacobian is fun
+  ## If Mass or Jacobian is fcn, then new Jacobian is fcn
   if (options.havejac)
-    if (options.havejacfun || options.havetimedep)
-      options.Jacobian = @ (t, y, yp) wrapjacfun (t, y, yp,
+    if (options.havejacfcn || options.havetimedep)
+      options.Jacobian = @ (t, y, yp) wrapjacfcn (t, y, yp,
                                                   options.Jacobian,
                                                   options.Mass,
                                                   options.havetimedep,
-                                                  options.havejacfun);
-      options.havejacfun = true;
+                                                  options.havejacfcn);
+      options.havejacfcn = true;
     else   # All matrices are constant
       if (! isempty (options.Mass))
         options.Jacobian = {[- options.Jacobian], [options.Mass]};
@@ -324,7 +324,7 @@
   [t, y, te, ye, ie] = __ode15__ (@ (t, y, yp) wrap (t, y, yp, options.Mass,
                                                      options.havetimedep,
                                                      options.havestatedep,
-                                                     fun),
+                                                     fcn),
                                   trange, y0, yp0, options, 2);
 
   if (nargout == 2)
@@ -352,24 +352,24 @@
 
 endfunction
 
-function res = wrap (t, y, yp, Mass, havetimedep, havestatedep, fun)
+function res = wrap (t, y, yp, Mass, havetimedep, havestatedep, fcn)
 
   if (! isempty (Mass) && havestatedep)
-    res = Mass (t, y) * yp - fun (t, y);
+    res = Mass (t, y) * yp - fcn (t, y);
   elseif (! isempty (Mass) && havetimedep)
-    res = Mass (t) * yp - fun (t, y);
+    res = Mass (t) * yp - fcn (t, y);
   elseif (! isempty (Mass))
-    res = Mass * yp - fun (t, y);
+    res = Mass * yp - fcn (t, y);
   else
-    res = yp - fun (t, y);
+    res = yp - fcn (t, y);
   endif
 
 endfunction
 
-function [jac, jact] = wrapjacfun (t, y, yp, Jac, Mass,
-                                   havetimedep, havejacfun)
+function [jac, jact] = wrapjacfcn (t, y, yp, Jac, Mass,
+                                   havetimedep, havejacfcn)
 
-  if (havejacfun)
+  if (havejacfcn)
     jac = - Jac (t, y);
   else
     jac = - Jac;
@@ -388,7 +388,7 @@
 
 %!demo
 %! ## Solve Robertson's equations with ode15s
-%! fun = @ (t, y) [-0.04*y(1) + 1e4*y(2).*y(3);
+%! fcn = @ (t, y) [-0.04*y(1) + 1e4*y(2).*y(3);
 %!                  0.04*y(1) - 1e4*y(2).*y(3) - 3e7*y(2).^2;
 %!                  y(1) + y(2) + y(3) - 1];
 %!
@@ -399,7 +399,7 @@
 %! options = odeset ("RelTol", 1e-4, "AbsTol", [1e-6, 1e-10, 1e-6],
 %!                   "MStateDependence", "none", "Mass", M);
 %!
-%! [t, y] = ode15s (fun, tspan, y0, options);
+%! [t, y] = ode15s (fcn, tspan, y0, options);
 %!
 %! y(:,2) = 1e4 * y(:,2);
 %! figure (2);
--- a/scripts/ode/ode23.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/ode/ode23.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {[@var{t}, @var{y}] =} ode23 (@var{fun}, @var{trange}, @var{init})
-## @deftypefnx {} {[@var{t}, @var{y}] =} ode23 (@var{fun}, @var{trange}, @var{init}, @var{ode_opt})
+## @deftypefn  {} {[@var{t}, @var{y}] =} ode23 (@var{fcn}, @var{trange}, @var{init})
+## @deftypefnx {} {[@var{t}, @var{y}] =} ode23 (@var{fcn}, @var{trange}, @var{init}, @var{ode_opt})
 ## @deftypefnx {} {[@var{t}, @var{y}, @var{te}, @var{ye}, @var{ie}] =} ode23 (@dots{})
 ## @deftypefnx {} {@var{solution} =} ode23 (@dots{})
 ## @deftypefnx {} {} ode23 (@dots{})
@@ -33,7 +33,7 @@
 ## Solve a set of non-stiff Ordinary Differential Equations (non-stiff ODEs)
 ## with the well known explicit @nospell{Bogacki-Shampine} method of order 3.
 ##
-## @var{fun} is a function handle, inline function, or string containing the
+## @var{fcn} is a function handle, inline function, or string containing the
 ## name of the function that defines the ODE: @code{y' = f(t,y)}.  The function
 ## must accept two inputs where the first is time @var{t} and the second is a
 ## column vector of unknowns @var{y}.
@@ -92,7 +92,7 @@
 ## @seealso{odeset, odeget, ode45, ode15s}
 ## @end deftypefn
 
-function varargout = ode23 (fun, trange, init, varargin)
+function varargout = ode23 (fcn, trange, init, varargin)
 
   if (nargin < 3)
     print_usage ();
@@ -103,7 +103,7 @@
 
   if (nargin >= 4)
     if (! isstruct (varargin{1}))
-      ## varargin{1:len} are parameters for fun
+      ## varargin{1:len} are parameters for fcn
       odeopts = odeset ();
       funarguments = varargin;
     elseif (numel (varargin) > 1)
@@ -142,16 +142,16 @@
   endif
   init = init(:);
 
-  if (ischar (fun))
-    if (! exist (fun))
+  if (ischar (fcn))
+    if (! exist (fcn))
       error ("Octave:invalid-input-arg",
-             ['ode23: function "' fun '" not found']);
+             ['ode23: function "' fcn '" not found']);
     endif
-    fun = str2func (fun);
+    fcn = str2func (fcn);
   endif
-  if (! is_function_handle (fun))
+  if (! is_function_handle (fcn))
     error ("Octave:invalid-input-arg",
-           "ode23: FUN must be a valid function handle");
+           "ode23: FCN must be a valid function handle");
   endif
 
   ## Start preprocessing, have a look which options are set in odeopts,
@@ -194,7 +194,7 @@
 
   if (isempty (odeopts.InitialStep))
     odeopts.InitialStep = odeopts.direction * ...
-                          starting_stepsize (order, fun, trange(1), init,
+                          starting_stepsize (order, fcn, trange(1), init,
                                              odeopts.AbsTol, odeopts.RelTol,
                                              strcmpi (odeopts.NormControl, "on"),
                                              odeopts.funarguments);
@@ -220,12 +220,12 @@
     if (! strcmp (odeopts.MStateDependence, "none"))
       ## constant mass matrices have already been handled
       mass = @(t,x) odeopts.Mass (t, x, odeopts.funarguments{:});
-      fun = @(t,x) mass (t, x, odeopts.funarguments{:}) ...
-                   \ fun (t, x, odeopts.funarguments{:});
+      fcn = @(t,x) mass (t, x, odeopts.funarguments{:}) ...
+                   \ fcn (t, x, odeopts.funarguments{:});
     else
       mass = @(t) odeopts.Mass (t, odeopts.funarguments{:});
-      fun = @(t,x) mass (t, odeopts.funarguments{:}) ...
-                   \ fun (t, x, odeopts.funarguments{:});
+      fcn = @(t,x) mass (t, odeopts.funarguments{:}) ...
+                   \ fcn (t, x, odeopts.funarguments{:});
     endif
   endif
 
@@ -239,7 +239,7 @@
   endif
 
   solution = integrate_adaptive (@runge_kutta_23,
-                                 order, fun, trange, init, odeopts);
+                                 order, fcn, trange, init, odeopts);
 
   ## Postprocessing, do whatever when terminating integration algorithm
   if (odeopts.haveoutputfunction)  # Cleanup plotter
@@ -511,4 +511,4 @@
 %!error <invalid time span>  ode23 (@fpol, [1 1], [3 15 1])
 %!error <INIT must be a numeric> ode23 (@fpol, [0 25], {[3 15 1]})
 %!error <INIT must be a .* vector> ode23 (@fpol, [0 25], [3 15 1; 3 15 1])
-%!error <FUN must be a valid function handle> ode23 (1, [0 25], [3 15 1])
+%!error <FCN must be a valid function handle> ode23 (1, [0 25], [3 15 1])
--- a/scripts/ode/ode23s.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/ode/ode23s.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {[@var{t}, @var{y}] =} ode23s (@var{fun}, @var{trange}, @var{init})
-## @deftypefnx {} {[@var{t}, @var{y}] =} ode23s (@var{fun}, @var{trange}, @var{init}, @var{ode_opt})
+## @deftypefn  {} {[@var{t}, @var{y}] =} ode23s (@var{fcn}, @var{trange}, @var{init})
+## @deftypefnx {} {[@var{t}, @var{y}] =} ode23s (@var{fcn}, @var{trange}, @var{init}, @var{ode_opt})
 ## @deftypefnx {} {[@var{t}, @var{y}] =} ode23s (@dots{}, @var{par1}, @var{par2}, @dots{})
 ## @deftypefnx {} {[@var{t}, @var{y}, @var{te}, @var{ye}, @var{ie}] =} ode23s (@dots{})
 ## @deftypefnx {} {@var{solution} =} ode23s (@dots{})
@@ -33,7 +33,7 @@
 ## Solve a set of stiff Ordinary Differential Equations (stiff ODEs) with a
 ## @nospell{Rosenbrock} method of order (2,3).
 ##
-## @var{fun} is a function handle, inline function, or string containing the
+## @var{fcn} is a function handle, inline function, or string containing the
 ## name of the function that defines the ODE: @code{M y' = f(t,y)}.  The
 ## function must accept two inputs where the first is time @var{t} and the
 ## second is a column vector of unknowns @var{y}.  @var{M} is a constant mass
@@ -93,7 +93,7 @@
 ## @seealso{odeset, daspk, dassl}
 ## @end deftypefn
 
-function varargout = ode23s (fun, trange, init, varargin)
+function varargout = ode23s (fcn, trange, init, varargin)
 
   if (nargin < 3)
     print_usage ();
@@ -104,7 +104,7 @@
 
   if (nargin >= 4)
     if (! isstruct (varargin{1}))
-      ## varargin{1:len} are parameters for fun
+      ## varargin{1:len} are parameters for fcn
       odeopts = odeset ();
       funarguments = varargin;
     elseif (numel (varargin) > 1)
@@ -143,16 +143,16 @@
   endif
   init = init(:);
 
-  if (ischar (fun))
-    if (! exist (fun))
+  if (ischar (fcn))
+    if (! exist (fcn))
       error ("Octave:invalid-input-arg",
-             ['ode23s: function "' fun '" not found']);
+             ['ode23s: function "' fcn '" not found']);
     endif
-    fun = str2func (fun);
+    fcn = str2func (fcn);
   endif
-  if (! is_function_handle (fun))
+  if (! is_function_handle (fcn))
     error ("Octave:invalid-input-arg",
-           "ode23s: FUN must be a valid function handle");
+           "ode23s: FCN must be a valid function handle");
   endif
 
   ## Start preprocessing, have a look which options are set in odeopts,
@@ -184,7 +184,7 @@
 
   if (isempty (odeopts.InitialStep))
     odeopts.InitialStep = odeopts.direction * ...
-                          starting_stepsize (order, fun, trange(1), init,
+                          starting_stepsize (order, fcn, trange(1), init,
                                              odeopts.AbsTol, odeopts.RelTol,
                                              strcmpi (odeopts.NormControl,
                                                       "on"),
@@ -215,7 +215,7 @@
   endif
 
   solution = integrate_adaptive (@runge_kutta_23s, ...
-                                 order, fun, trange, init, odeopts);
+                                 order, fcn, trange, init, odeopts);
 
   ## Postprocessing, do whatever when terminating integration algorithm
   if (odeopts.haveoutputfunction)  # Cleanup plotter
@@ -277,45 +277,45 @@
 
 %!demo
 %! ## Demo function: stiff Van Der Pol equation
-%! fun = @(t,y) [y(2); 10*(1-y(1)^2)*y(2)-y(1)];
+%! fcn = @(t,y) [y(2); 10*(1-y(1)^2)*y(2)-y(1)];
 %! ## Calling ode23s method
 %! tic ()
-%! [vt, vy] = ode23s (fun, [0 20], [2 0]);
+%! [vt, vy] = ode23s (fcn, [0 20], [2 0]);
 %! toc ()
 %! ## Plotting the result
 %! plot (vt,vy(:,1),'-o');
 
 %!demo
 %! ## Demo function: stiff Van Der Pol equation
-%! fun = @(t,y) [y(2); 10*(1-y(1)^2)*y(2)-y(1)];
+%! fcn = @(t,y) [y(2); 10*(1-y(1)^2)*y(2)-y(1)];
 %! ## Calling ode23s method
 %! odeopts = odeset ("Jacobian", @(t,y) [0 1; -20*y(1)*y(2)-1, 10*(1-y(1)^2)],
 %!                   "InitialStep", 1e-3)
 %! tic ()
-%! [vt, vy] = ode23s (fun, [0 20], [2 0], odeopts);
+%! [vt, vy] = ode23s (fcn, [0 20], [2 0], odeopts);
 %! toc ()
 %! ## Plotting the result
 %! plot (vt,vy(:,1),'-o');
 
 %!demo
 %! ## Demo function: stiff Van Der Pol equation
-%! fun = @(t,y) [y(2); 100*(1-y(1)^2)*y(2)-y(1)];
+%! fcn = @(t,y) [y(2); 100*(1-y(1)^2)*y(2)-y(1)];
 %! ## Calling ode23s method
 %! odeopts = odeset ("InitialStep", 1e-4);
 %! tic ()
-%! [vt, vy] = ode23s (fun, [0 200], [2 0]);
+%! [vt, vy] = ode23s (fcn, [0 200], [2 0]);
 %! toc ()
 %! ## Plotting the result
 %! plot (vt,vy(:,1),'-o');
 
 %!demo
 %! ## Demo function: stiff Van Der Pol equation
-%! fun = @(t,y) [y(2); 100*(1-y(1)^2)*y(2)-y(1)];
+%! fcn = @(t,y) [y(2); 100*(1-y(1)^2)*y(2)-y(1)];
 %! ## Calling ode23s method
 %! odeopts = odeset ("Jacobian", @(t,y) [0 1; -200*y(1)*y(2)-1, 100*(1-y(1)^2)],
 %!                   "InitialStep", 1e-4);
 %! tic ()
-%! [vt, vy] = ode23s (fun, [0 200], [2 0], odeopts);
+%! [vt, vy] = ode23s (fcn, [0 200], [2 0], odeopts);
 %! toc ()
 %! ## Plotting the result
 %! plot (vt,vy(:,1),'-o');
@@ -509,4 +509,4 @@
 %!error <invalid time span>  ode23s (@fpol, [1 1], [3 15 1])
 %!error <INIT must be a numeric> ode23s (@fpol, [0 25], {[3 15 1]})
 %!error <INIT must be a .* vector> ode23s (@fpol, [0 25], [3 15 1; 3 15 1])
-%!error <FUN must be a valid function handle> ode23s (1, [0 25], [3 15 1])
+%!error <FCN must be a valid function handle> ode23s (1, [0 25], [3 15 1])
--- a/scripts/ode/ode45.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/ode/ode45.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {[@var{t}, @var{y}] =} ode45 (@var{fun}, @var{trange}, @var{init})
-## @deftypefnx {} {[@var{t}, @var{y}] =} ode45 (@var{fun}, @var{trange}, @var{init}, @var{ode_opt})
+## @deftypefn  {} {[@var{t}, @var{y}] =} ode45 (@var{fcn}, @var{trange}, @var{init})
+## @deftypefnx {} {[@var{t}, @var{y}] =} ode45 (@var{fcn}, @var{trange}, @var{init}, @var{ode_opt})
 ## @deftypefnx {} {[@var{t}, @var{y}, @var{te}, @var{ye}, @var{ie}] =} ode45 (@dots{})
 ## @deftypefnx {} {@var{solution} =} ode45 (@dots{})
 ## @deftypefnx {} {} ode45 (@dots{})
@@ -33,7 +33,7 @@
 ## Solve a set of non-stiff Ordinary Differential Equations (non-stiff ODEs)
 ## with the well known explicit @nospell{Dormand-Prince} method of order 4.
 ##
-## @var{fun} is a function handle, inline function, or string containing the
+## @var{fcn} is a function handle, inline function, or string containing the
 ## name of the function that defines the ODE: @code{y' = f(t,y)}.  The function
 ## must accept two inputs where the first is time @var{t} and the second is a
 ## column vector of unknowns @var{y}.
@@ -89,7 +89,7 @@
 ## @seealso{odeset, odeget, ode23, ode15s}
 ## @end deftypefn
 
-function varargout = ode45 (fun, trange, init, varargin)
+function varargout = ode45 (fcn, trange, init, varargin)
 
   if (nargin < 3)
     print_usage ();
@@ -100,7 +100,7 @@
 
   if (nargin >= 4)
     if (! isstruct (varargin{1}))
-      ## varargin{1:len} are parameters for fun
+      ## varargin{1:len} are parameters for fcn
       odeopts = odeset ();
       funarguments = varargin;
     elseif (numel (varargin) > 1)
@@ -139,16 +139,16 @@
   endif
   init = init(:);
 
-  if (ischar (fun))
-    if (! exist (fun))
+  if (ischar (fcn))
+    if (! exist (fcn))
       error ("Octave:invalid-input-arg",
-             ['ode45: function "' fun '" not found']);
+             ['ode45: function "' fcn '" not found']);
     endif
-    fun = str2func (fun);
+    fcn = str2func (fcn);
   endif
-  if (! is_function_handle (fun))
+  if (! is_function_handle (fcn))
     error ("Octave:invalid-input-arg",
-           "ode45: FUN must be a valid function handle");
+           "ode45: FCN must be a valid function handle");
   endif
 
   ## Start preprocessing, have a look which options are set in odeopts,
@@ -194,7 +194,7 @@
 
   if (isempty (odeopts.InitialStep))
     odeopts.InitialStep = odeopts.direction * ...
-                          starting_stepsize (order, fun, trange(1), init,
+                          starting_stepsize (order, fcn, trange(1), init,
                                              odeopts.AbsTol, odeopts.RelTol,
                                              strcmpi (odeopts.NormControl, "on"),
                                              odeopts.funarguments);
@@ -220,12 +220,12 @@
     if (! strcmp (odeopts.MStateDependence, "none"))
       ### constant mass matrices have already
       mass = @(t,x) odeopts.Mass (t, x, odeopts.funarguments{:});
-      fun = @(t,x) mass (t, x, odeopts.funarguments{:}) ...
-                   \ fun (t, x, odeopts.funarguments{:});
+      fcn = @(t,x) mass (t, x, odeopts.funarguments{:}) ...
+                   \ fcn (t, x, odeopts.funarguments{:});
     else
       mass = @(t) odeopts.Mass (t, odeopts.funarguments{:});
-      fun = @(t,x) mass (t, odeopts.funarguments{:}) ...
-                   \ fun (t, x, odeopts.funarguments{:});
+      fcn = @(t,x) mass (t, odeopts.funarguments{:}) ...
+                   \ fcn (t, x, odeopts.funarguments{:});
     endif
   endif
 
@@ -239,7 +239,7 @@
   endif
 
   solution = integrate_adaptive (@runge_kutta_45_dorpri,
-                                 order, fun, trange, init, odeopts);
+                                 order, fcn, trange, init, odeopts);
 
   ## Postprocessing, do whatever when terminating integration algorithm
   if (odeopts.haveoutputfunction)  # Cleanup plotter
@@ -523,4 +523,4 @@
 %!error <invalid time span> ode45 (@fpol, [1 1], [3 15 1])
 %!error <INIT must be a numeric> ode45 (@fpol, [0 25], {[3 15 1]})
 %!error <INIT must be a .* vector> ode45 (@fpol, [0 25], [3 15 1; 3 15 1])
-%!error <FUN must be a valid function handle> ode45 (1, [0 25], [3 15 1])
+%!error <FCN must be a valid function handle> ode45 (1, [0 25], [3 15 1])
--- a/scripts/ode/odeset.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/ode/odeset.m	Mon Aug 29 13:58:00 2022 +0200
@@ -139,7 +139,7 @@
 ## Print solver statistics after simulation.
 ##
 ## @item @code{Vectorized}: @{@qcode{"off"}@} | @qcode{"on"}
-## Specify whether @code{odefun} can be passed multiple values of the
+## Specify whether @code{odefcn} can be passed multiple values of the
 ## state at once.
 ##
 ## @end table
--- a/scripts/ode/private/check_default_input.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/ode/private/check_default_input.m	Mon Aug 29 13:58:00 2022 +0200
@@ -23,30 +23,30 @@
 ##
 ########################################################################
 
-function fun = check_default_input (fun, trange, solver, y0, yp0);
+function fcn = check_default_input (fcn, trange, solver, y0, yp0);
 
   if (nargin < 4)
     print_usage ();
   endif
 
-  ## Check fun
-  validateattributes (fun, {"function_handle", "char"}, {}, solver, "fun");
+  ## Check fcn
+  validateattributes (fcn, {"function_handle", "char"}, {}, solver, "fcn");
 
-  if (! (nargin (fun) == nargin - 2))
+  if (! (nargin (fcn) == nargin - 2))
     error ("Octave:invalid-input-arg",
-           [solver ": invalid value assigned to field 'fun'"]);
+           [solver ": invalid value assigned to field 'fcn'"]);
   endif
 
-  if (ischar (fun))
-    if (! exist (fun))
+  if (ischar (fcn))
+    if (! exist (fcn))
       error ("Octave:invalid-input-arg",
-             [solver ": function '" fun "' not found"]);
+             [solver ": function '" fcn "' not found"]);
     endif
-    fun = str2func (fun);
+    fcn = str2func (fcn);
   endif
-  if (! is_function_handle (fun))
+  if (! is_function_handle (fcn))
     error ("Octave:invalid-input-arg",
-           [solver ": invalid value assigned to field '" fun "'"]);
+           [solver ": invalid value assigned to field '" fcn "'"]);
   endif
 
   ## Check trange
@@ -74,10 +74,10 @@
     endif
     yp0 = yp0(:);
 
-    n = numel (feval (fun, trange(1), y0, yp0));
+    n = numel (feval (fcn, trange(1), y0, yp0));
     validateattributes (yp0, {"float"}, {"numel", n}, solver, "yp0");
   else
-    n = numel (feval (fun, trange (1), y0));
+    n = numel (feval (fcn, trange(1), y0));
   endif
 
   validateattributes (y0, {"float"}, {"numel", n}, solver, "y0");
--- a/scripts/ode/private/integrate_adaptive.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/ode/private/integrate_adaptive.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {@var{solution} =} integrate_adaptive (@var{@@stepper}, @var{order}, @var{@@func}, @var{tspan}, @var{x0}, @var{options})
+## @deftypefn {} {@var{solution} =} integrate_adaptive (@var{@@stepper}, @var{order}, @var{@@fcn}, @var{tspan}, @var{x0}, @var{options})
 ##
 ## This function file can be called by an ODE solver function in order to
 ## integrate the set of ODEs on the interval @var{[t0, t1]} with an adaptive
@@ -68,7 +68,7 @@
 ##
 ## @end deftypefn
 
-function solution = integrate_adaptive (stepper, order, func, tspan, x0,
+function solution = integrate_adaptive (stepper, order, fcn, tspan, x0,
                                         options)
 
   fixed_times = numel (tspan) > 2;
@@ -79,7 +79,7 @@
   ## Get first initial timestep
   dt = options.InitialStep;
   if (isempty (dt))
-    dt = starting_stepsize (order, func, t, x,
+    dt = starting_stepsize (order, fcn, t, x,
                             options.AbsTol, options.RelTol,
                             strcmp (options.NormControl, "on"),
                             options.funarguments);
@@ -133,7 +133,7 @@
     ## Compute integration step from t_old to t_new = t_old + dt
     [t_new, options.comp] = kahan (t_old, options.comp, dt);
     [t_new, x_new, x_est, new_k_vals] = ...
-      stepper (func, t_old, x_old, dt, options, k_vals, t_new);
+      stepper (fcn, t_old, x_old, dt, options, k_vals, t_new);
 
     solution.cntcycles += 1;
 
@@ -163,7 +163,7 @@
           iout = max (t_caught);
           x(:, t_caught) = ...
             runge_kutta_interpolate (order, [t_old t_new], [x_old x_new],
-                                     t(t_caught), new_k_vals, dt, func,
+                                     t(t_caught), new_k_vals, dt, fcn,
                                      options.funarguments);
 
           istep += 1;
--- a/scripts/ode/private/ode_event_handler.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/ode/private/ode_event_handler.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,9 +24,9 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {@var{retval} =} ode_event_handler (@var{@@evtfun}, @var{t}, @var{y}, @var{flag}, @var{par1}, @var{par2}, @dots{})
+## @deftypefn {} {@var{retval} =} ode_event_handler (@var{@@evtfcn}, @var{t}, @var{y}, @var{flag}, @var{par1}, @var{par2}, @dots{})
 ##
-## Return the solution of the event function (@var{@@evtfun}) which is
+## Return the solution of the event function (@var{@@evtfcn}) which is
 ## specified in the form of a function handle.
 ##
 ## The second input argument @var{t} is a scalar double and specifies the time
@@ -60,7 +60,7 @@
 ## necessary to call it directly.
 ## @end deftypefn
 
-function retval = ode_event_handler (evtfun, t, y, flag = "", varargin)
+function retval = ode_event_handler (evtfcn, t, y, flag = "", varargin)
 
   ## No error handling has been implemented in this function to achieve
   ## the highest performance possible.
@@ -85,9 +85,9 @@
     ## Process the event, i.e.,
     ## find the zero crossings for either a rising or falling edge
     if (! iscell (y))
-      inpargs = {evtfun, t, y};
+      inpargs = {evtfcn, t, y};
     else
-      inpargs = {evtfun, t, y{1}, y{2}};
+      inpargs = {evtfcn, t, y{1}, y{2}};
       y = y{1};  # Delete cell element 2
     endif
     if (nargin > 4)
@@ -141,9 +141,9 @@
     firstrun = true;
 
     if (! iscell (y))
-      inpargs = {evtfun, t, y};
+      inpargs = {evtfcn, t, y};
     else
-      inpargs = {evtfun, t, y{1}, y{2}};
+      inpargs = {evtfcn, t, y{1}, y{2}};
       y = y{1};  # Delete cell element 2
     endif
     if (nargin > 4)
--- a/scripts/ode/private/runge_kutta_23.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/ode/private/runge_kutta_23.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,10 +24,10 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {[@var{t_next}, @var{x_next}] =} runge_kutta_23 (@var{fun}, @var{t}, @var{x}, @var{dt})
-## @deftypefnx {} {[@var{t_next}, @var{x_next}] =} runge_kutta_23 (@var{fun}, @var{t}, @var{x}, @var{dt}, @var{options})
-## @deftypefnx {} {[@var{t_next}, @var{x_next}] =} runge_kutta_23 (@var{fun}, @var{t}, @var{x}, @var{dt}, @var{options}, @var{k_vals})
-## @deftypefnx {} {[@var{t_next}, @var{x_next}] =} runge_kutta_23 (@var{fun}, @var{t}, @var{x}, @var{dt}, @var{options}, @var{k_vals}, @var{t_next})
+## @deftypefn  {} {[@var{t_next}, @var{x_next}] =} runge_kutta_23 (@var{fcn}, @var{t}, @var{x}, @var{dt})
+## @deftypefnx {} {[@var{t_next}, @var{x_next}] =} runge_kutta_23 (@var{fcn}, @var{t}, @var{x}, @var{dt}, @var{options})
+## @deftypefnx {} {[@var{t_next}, @var{x_next}] =} runge_kutta_23 (@var{fcn}, @var{t}, @var{x}, @var{dt}, @var{options}, @var{k_vals})
+## @deftypefnx {} {[@var{t_next}, @var{x_next}] =} runge_kutta_23 (@var{fcn}, @var{t}, @var{x}, @var{dt}, @var{options}, @var{k_vals}, @var{t_next})
 ## @deftypefnx {} {[@var{t_next}, @var{x_next}, @var{x_est}] =} runge_kutta_23 (@dots{})
 ## @deftypefnx {} {[@var{t_next}, @var{x_next}, @var{x_est}, @var{k_vals_out}] =} runge_kutta_23 (@dots{})
 ##
@@ -36,7 +36,7 @@
 ## method of third order.  For the definition of this method see
 ## @url{http://en.wikipedia.org/wiki/List_of_Runge%E2%80%93Kutta_methods}.
 ##
-## @var{fun} is a function handle that defines the ODE: @code{y' = f(tau,y)}.
+## @var{fcn} is a function handle that defines the ODE: @code{y' = f(tau,y)}.
 ## The function must accept two inputs where the first is time @var{tau} and
 ## the second is a column vector of unknowns @var{y}.
 ##
@@ -49,7 +49,7 @@
 ## The optional fourth argument @var{options} specifies options for the ODE
 ## solver.  It is a structure generated by @code{odeset}.  In particular it
 ## contains the field @var{funarguments} with the optional arguments to be used
-## in the evaluation of @var{fun}.
+## in the evaluation of @var{fcn}.
 ##
 ## The optional fifth argument @var{k_vals_in} contains the Runge-Kutta
 ## evaluations of the previous step to use in a FSAL scheme.
@@ -66,7 +66,7 @@
 ## @seealso{runge_kutta_45_dorpri}
 ## @end deftypefn
 
-function [t_next, x_next, x_est, k] = runge_kutta_23 (fun, t, x, dt,
+function [t_next, x_next, x_est, k] = runge_kutta_23 (fcn, t, x, dt,
                                                       options = [],
                                                       k_vals = [],
                                                       t_next = t + dt)
@@ -92,11 +92,11 @@
   if (! isempty (k_vals))    # k values from previous step are passed
     k(:,1) = k_vals(:,end);  # FSAL property
   else
-    k(:,1) = feval (fun, t, x, args{:});
+    k(:,1) = feval (fcn, t, x, args{:});
   endif
 
-  k(:,2) = feval (fun, s(2), x + k(:,1) * aa(2, 1).', args{:});
-  k(:,3) = feval (fun, s(3), x + k(:,2) * aa(3, 2).', args{:});
+  k(:,2) = feval (fcn, s(2), x + k(:,1) * aa(2, 1).', args{:});
+  k(:,3) = feval (fcn, s(3), x + k(:,2) * aa(3, 2).', args{:});
 
   ## compute new time and new values for the unknowns
   ## t_next = t + dt;
@@ -105,7 +105,7 @@
   ## if the estimation of the error is required
   if (nargout >= 3)
     ## new solution to be compared with the previous one
-    k(:,4) = feval (fun, t_next, x_next, args{:});
+    k(:,4) = feval (fcn, t_next, x_next, args{:});
     cc_prime = dt * c_prime;
     x_est = x + k * cc_prime(:);
   endif
--- a/scripts/ode/private/runge_kutta_23s.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/ode/private/runge_kutta_23s.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,10 +24,10 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {[@var{t_next}, @var{x_next}] =} runge_kutta_23s (@var{fun}, @var{t}, @var{x}, @var{dt})
-## @deftypefnx {} {[@var{t_next}, @var{x_next}] =} runge_kutta_23s (@var{fun}, @var{t}, @var{x}, @var{dt}, @var{options})
-## @deftypefnx {} {[@var{t_next}, @var{x_next}] =} runge_kutta_23s (@var{fun}, @var{t}, @var{x}, @var{dt}, @var{options}, @var{k_vals})
-## @deftypefnx {} {[@var{t_next}, @var{x_next}] =} runge_kutta_23s (@var{fun}, @var{t}, @var{x}, @var{dt}, @var{options}, @var{k_vals}, @var{t_next})
+## @deftypefn  {} {[@var{t_next}, @var{x_next}] =} runge_kutta_23s (@var{fcn}, @var{t}, @var{x}, @var{dt})
+## @deftypefnx {} {[@var{t_next}, @var{x_next}] =} runge_kutta_23s (@var{fcn}, @var{t}, @var{x}, @var{dt}, @var{options})
+## @deftypefnx {} {[@var{t_next}, @var{x_next}] =} runge_kutta_23s (@var{fcn}, @var{t}, @var{x}, @var{dt}, @var{options}, @var{k_vals})
+## @deftypefnx {} {[@var{t_next}, @var{x_next}] =} runge_kutta_23s (@var{fcn}, @var{t}, @var{x}, @var{dt}, @var{options}, @var{k_vals}, @var{t_next})
 ## @deftypefnx {} {[@var{t_next}, @var{x_next}, @var{x_est}] =} runge_kutta_23s (@dots{})
 ## @deftypefnx {} {[@var{t_next}, @var{x_next}, @var{x_est}, @var{k_vals_out}] =} runge_kutta_23s (@dots{})
 ##
@@ -50,7 +50,7 @@
 ## The optional fourth argument @var{options} specifies options for the ODE
 ## solver.  It is a structure generated by @code{odeset}.  In particular it
 ## contains the field @var{funarguments} with the optional arguments to be used
-## in the evaluation of @var{fun}.
+## in the evaluation of @var{fcn}.
 ##
 ## The optional fifth argument @var{k_vals_in} contains the Runge-Kutta
 ## evaluations of the previous step to use in a FSAL scheme.
@@ -67,7 +67,7 @@
 ## @seealso{runge_kutta_23}
 ## @end deftypefn
 
-function [t_next, x_next, x_est, k] = runge_kutta_23s (fun, t, x, dt,
+function [t_next, x_next, x_est, k] = runge_kutta_23s (fcn, t, x, dt,
                                                        options = [],
                                                        k_vals = [],
                                                        t_next = t + dt)
@@ -83,14 +83,14 @@
     args = {};
   endif
 
-  jacfun = false;
+  jacfcn = false;
   jacmat = false;
   if (! isempty (options.Jacobian))
     if (ischar (options.Jacobian))
-      jacfun = true;
+      jacfcn = true;
       jac = str2fun (options.Jacobian);
     elseif (is_function_handle (options.Jacobian))
-      jacfun = true;
+      jacfcn = true;
       jac = options.Jacobian;
     elseif (ismatrix (options.Jacobian))
       jacmat = true;
@@ -110,15 +110,15 @@
   ## Jacobian matrix, dfxpdp
   if (jacmat)
     J = jac;
-  elseif (jacfun)
+  elseif (jacfcn)
     J = jac (t, x);
   elseif (! jacpat)
-    J = __dfxpdp__ (x, @(a) feval (fun, t, a, args{:}), options.RelTol);
+    J = __dfxpdp__ (x, @(a) feval (fcn, t, a, args{:}), options.RelTol);
   elseif (jacpat)
-    J = __dfxpdp__ (x, @(a) feval (fun, t, a, args{:}), options.RelTol, pattern);
+    J = __dfxpdp__ (x, @(a) feval (fcn, t, a, args{:}), options.RelTol, pattern);
   endif
 
-  T = (feval (fun, t + .1 * dt, x) - feval (fun, t, x, args{:})) / (.1 * dt);
+  T = (feval (fcn, t + .1 * dt, x) - feval (fcn, t, x, args{:})) / (.1 * dt);
 
   ## Wolfbrandt coefficient
   if (isempty (options.Mass))
@@ -135,13 +135,13 @@
   endif
 
   ## compute the slopes
-  F(:,1) = feval (fun, t, x, args{:});
+  F(:,1) = feval (fcn, t, x, args{:});
   if (issparse (W))
     k(:,1) = Qw * (Uw \ (Lw \ (Pw * (Rw \ (F(:,1) + dt*d*T)))));
   else
     k(:,1) = Uw \ (Lw \ (Pw * (F(:,1) + dt*d*T)));
   endif
-  F(:,2) = feval (fun, t+a*dt, x+a*dt*k(:,1), args{:});
+  F(:,2) = feval (fcn, t+a*dt, x+a*dt*k(:,1), args{:});
   if (issparse (W))
     k(:,2) = Uw * (Uw \ (Lw \ (Pw * (Rw \ (F(:,2) - M*k(:,1)))))) + k(:,1);
   else
@@ -153,7 +153,7 @@
 
   if (nargout >= 3)
     ## 3rd order, needed in error formula
-    F(:,3) = feval (fun, t+dt, x_next, args{:});
+    F(:,3) = feval (fcn, t+dt, x_next, args{:});
     if (issparse (W))
       k(:,3) = Qw * (Uw \ (Lw \ (Pw * (Rw \ (F(:,3) - e32 * (M*k(:,2) - F(:,2)) - 2 * (M*k(:,1) - F(:,1)) + dt*d*T)))));
     else
@@ -170,12 +170,12 @@
 endfunction
 
 
-function prt = __dfxpdp__ (p, func, rtol, pattern)
+function prt = __dfxpdp__ (p, fcn, rtol, pattern)
 
   ## This subfunction was copied 2011 from the OF "optim" package
   ## "inst/private/__dfdp__.m".
 
-  f = func (p)(:);
+  f = fcn (p)(:);
   m = numel (f);
   n = numel (p);
 
@@ -193,9 +193,9 @@
     prt = pattern;  # initialize Jacobian
     for j = find (any (pattern, 1))
       ps(j) = p1(j);
-      tp1 = func (ps);
+      tp1 = fcn (ps);
       ps(j) = p2(j);
-      tp2 = func (ps);
+      tp2 = fcn (ps);
       pattern_nnz = find (pattern(:, j));
       prt(pattern_nnz, j) = (tp1(pattern_nnz) - tp2(pattern_nnz)) / absdel(j);
       ps(j) = p(j);
@@ -204,9 +204,9 @@
     prt = zeros (m, n); # initialize Jacobian
     for j = 1:n
       ps(j) = p1(j);
-      tp1 = func (ps);
+      tp1 = fcn (ps);
       ps(j) = p2(j);
-      tp2 = func (ps);
+      tp2 = fcn (ps);
       prt(:, j) = (tp1(:) - tp2(:)) / absdel(j);
       ps(j) = p(j);
     endfor
--- a/scripts/ode/private/runge_kutta_45_dorpri.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/ode/private/runge_kutta_45_dorpri.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,10 +24,10 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {[@var{t_next}, @var{x_next}] =} runge_kutta_45_dorpri (@var{@@fun}, @var{t}, @var{x}, @var{dt})
-## @deftypefnx {} {[@var{t_next}, @var{x_next}] =} runge_kutta_45_dorpri (@var{@@fun}, @var{t}, @var{x}, @var{dt}, @var{options})
-## @deftypefnx {} {[@var{t_next}, @var{x_next}] =} runge_kutta_45_dorpri (@var{@@fun}, @var{t}, @var{x}, @var{dt}, @var{options}, @var{k_vals})
-## @deftypefnx {} {[@var{t_next}, @var{x_next}] =} runge_kutta_45_dorpri (@var{@@fun}, @var{t}, @var{x}, @var{dt}, @var{options}, @var{k_vals}, @var{t_next})
+## @deftypefn  {} {[@var{t_next}, @var{x_next}] =} runge_kutta_45_dorpri (@var{@@fcn}, @var{t}, @var{x}, @var{dt})
+## @deftypefnx {} {[@var{t_next}, @var{x_next}] =} runge_kutta_45_dorpri (@var{@@fcn}, @var{t}, @var{x}, @var{dt}, @var{options})
+## @deftypefnx {} {[@var{t_next}, @var{x_next}] =} runge_kutta_45_dorpri (@var{@@fcn}, @var{t}, @var{x}, @var{dt}, @var{options}, @var{k_vals})
+## @deftypefnx {} {[@var{t_next}, @var{x_next}] =} runge_kutta_45_dorpri (@var{@@fcn}, @var{t}, @var{x}, @var{dt}, @var{options}, @var{k_vals}, @var{t_next})
 ## @deftypefnx {} {[@var{t_next}, @var{x_next}, @var{x_est}] =} runge_kutta_45_dorpri (@dots{})
 ## @deftypefnx {} {[@var{t_next}, @var{x_next}, @var{x_est}, @var{k_vals_out}] =} runge_kutta_45_dorpri (@dots{})
 ##
@@ -67,7 +67,7 @@
 ## to use in an FSAL scheme or for dense output.
 ## @end deftypefn
 
-function [t_next, x_next, x_est, k] = runge_kutta_45_dorpri (fun, t, x, dt,
+function [t_next, x_next, x_est, k] = runge_kutta_45_dorpri (fcn, t, x, dt,
                                                              options = [],
                                                              k_vals = [],
                                                              t_next = t + dt)
@@ -100,14 +100,14 @@
   if (! isempty (k_vals))    # k values from previous step are passed
     k(:,1) = k_vals(:,end);  # FSAL property
   else
-    k(:,1) = feval (fun, t, x, args{:});
+    k(:,1) = feval (fcn, t, x, args{:});
   endif
 
-  k(:,2) = feval (fun, s(2), x + k(:,1)   * aa(2, 1).'  , args{:});
-  k(:,3) = feval (fun, s(3), x + k(:,1:2) * aa(3, 1:2).', args{:});
-  k(:,4) = feval (fun, s(4), x + k(:,1:3) * aa(4, 1:3).', args{:});
-  k(:,5) = feval (fun, s(5), x + k(:,1:4) * aa(5, 1:4).', args{:});
-  k(:,6) = feval (fun, s(6), x + k(:,1:5) * aa(6, 1:5).', args{:});
+  k(:,2) = feval (fcn, s(2), x + k(:,1)   * aa(2, 1).'  , args{:});
+  k(:,3) = feval (fcn, s(3), x + k(:,1:2) * aa(3, 1:2).', args{:});
+  k(:,4) = feval (fcn, s(4), x + k(:,1:3) * aa(4, 1:3).', args{:});
+  k(:,5) = feval (fcn, s(5), x + k(:,1:4) * aa(5, 1:4).', args{:});
+  k(:,6) = feval (fcn, s(6), x + k(:,1:5) * aa(6, 1:5).', args{:});
 
   ## compute new time and new values for the unknowns
   ## t_next = t + dt;
@@ -116,7 +116,7 @@
   ## if the estimation of the error is required
   if (nargout >= 3)
     ## new solution to be compared with the previous one
-    k(:,7) = feval (fun, t_next, x_next, args{:});
+    k(:,7) = feval (fcn, t_next, x_next, args{:});
     cc_prime = dt * c_prime;
     x_est = x + k * cc_prime(:);
   endif
--- a/scripts/ode/private/runge_kutta_interpolate.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/ode/private/runge_kutta_interpolate.m	Mon Aug 29 13:58:00 2022 +0200
@@ -23,7 +23,7 @@
 ##
 ########################################################################
 
-function u_interp = runge_kutta_interpolate (order, z, u, t, k_vals, dt, func, args)
+function u_interp = runge_kutta_interpolate (order, z, u, t, k_vals, dt, fcn, args)
 
   switch (order)
 
@@ -34,7 +34,7 @@
       if (! isempty (k_vals))
         der = k_vals(:,1);
       else
-        der = feval (func, z(1) , u(:,1), args);
+        der = feval (fcn, z(1) , u(:,1), args);
       endif
       u_interp = quadratic_interpolation (z, u, der, t);
 
@@ -48,8 +48,8 @@
     otherwise
       warning (["High order interpolation not yet implemented: ", ...
                 "using cubic interpolation instead"]);
-      der(:,1) = feval (func, z(1), u(:,1), args);
-      der(:,2) = feval (func, z(2), u(:,2), args);
+      der(:,1) = feval (fcn, z(1), u(:,1), args);
+      der(:,2) = feval (fcn, z(2), u(:,2), args);
       u_interp = hermite_cubic_interpolation (z, u, der, t);
 
   endswitch
--- a/scripts/ode/private/starting_stepsize.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/ode/private/starting_stepsize.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,12 +24,12 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {@var{h} =} starting_stepsize (@var{order}, @var{func}, @var{t0}, @var{x0}, @var{AbsTol}, @var{RelTol}, @var{normcontrol}, @var{args})
+## @deftypefn {} {@var{h} =} starting_stepsize (@var{order}, @var{fcn}, @var{t0}, @var{x0}, @var{AbsTol}, @var{RelTol}, @var{normcontrol}, @var{args})
 ##
 ## Determine a good initial timestep for an ODE solver of order @var{order}
 ## using the algorithm described in reference [1].
 ##
-## The input argument @var{func}, is the function describing the differential
+## The input argument @var{fcn}, is the function describing the differential
 ## equations, @var{t0} is the initial time, and @var{x0} is the initial
 ## condition.  @var{AbsTol} and @var{RelTol} are the absolute and relative
 ## tolerance on the ODE integration taken from an ode options structure.
@@ -42,7 +42,7 @@
 ##
 ## @seealso{odepkg}
 
-function h = starting_stepsize (order, func, t0, x0,
+function h = starting_stepsize (order, fcn, t0, x0,
                                 AbsTol, RelTol, normcontrol,
                                 args = {})
 
@@ -50,7 +50,7 @@
   d0 = AbsRel_norm (x0, x0, AbsTol, RelTol, normcontrol);
 
   ## compute norm of the function evaluated at initial conditions
-  y = func (t0, x0, args{:});
+  y = fcn (t0, x0, args{:});
   if (iscell (y))
     y = y{1};
   endif
@@ -66,7 +66,7 @@
   x1 = x0 + h0 * y;
 
   ## approximate the derivative norm
-  yh = func (t0+h0, x1, args{:});
+  yh = fcn (t0+h0, x1, args{:});
   if (iscell (yh))
     yh = yh{1};
   endif
--- a/scripts/optimization/__all_opts__.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/optimization/__all_opts__.m	Mon Aug 29 13:58:00 2022 +0200
@@ -55,8 +55,8 @@
     for i = 1:nargin
       try
         opts = optimset (varargin{i});
-        fn = fieldnames (opts).';
-        names = [names, fn];
+        fcn = fieldnames (opts).';
+        names = [names, fcn];
       catch
         ## throw the error as a warning.
         warning (lasterr ());
--- a/scripts/optimization/fminbnd.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/optimization/fminbnd.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,12 +24,12 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {@var{x} =} fminbnd (@var{fun}, @var{a}, @var{b})
-## @deftypefnx {} {@var{x} =} fminbnd (@var{fun}, @var{a}, @var{b}, @var{options})
+## @deftypefn  {} {@var{x} =} fminbnd (@var{fcn}, @var{a}, @var{b})
+## @deftypefnx {} {@var{x} =} fminbnd (@var{fcn}, @var{a}, @var{b}, @var{options})
 ## @deftypefnx {} {[@var{x}, @var{fval}, @var{info}, @var{output}] =} fminbnd (@dots{})
 ## Find a minimum point of a univariate function.
 ##
-## @var{fun} is a function handle, inline function, or string containing the
+## @var{fcn} is a function handle, inline function, or string containing the
 ## name of the function to evaluate.
 ##
 ## The starting interval is specified by @var{a} (left boundary) and @var{b}
@@ -88,10 +88,10 @@
 ## PKG_ADD: ## Discard result to avoid polluting workspace with ans at startup.
 ## PKG_ADD: [~] = __all_opts__ ("fminbnd");
 
-function [x, fval, info, output] = fminbnd (fun, a, b, options = struct ())
+function [x, fval, info, output] = fminbnd (fcn, a, b, options = struct ())
 
   ## Get default options if requested.
-  if (nargin == 1 && ischar (fun) && strcmp (fun, "defaults"))
+  if (nargin == 1 && ischar (fcn) && strcmp (fcn, "defaults"))
     x = struct ("Display", "notify", "FunValCheck", "off",
                 "MaxFunEvals", 500, "MaxIter", 500,
                 "OutputFcn", [], "TolX", 1e-4);
@@ -107,8 +107,8 @@
            "fminbnd: the lower bound cannot be greater than the upper one");
   endif
 
-  if (ischar (fun))
-    fun = str2func (fun);
+  if (ischar (fcn))
+    fcn = str2func (fcn);
   endif
 
   displ = optimget (options, "Display", "notify");
@@ -119,8 +119,8 @@
   maxfev = optimget (options, "MaxFunEvals", 500);
 
   if (funvalchk)
-    ## Replace fun with a guarded version.
-    fun = @(x) guarded_eval (fun, x);
+    ## Replace fcn with a guarded version.
+    fcn = @(x) guarded_eval (fcn, x);
   endif
 
   ## The default exit flag if exceeded number of iterations.
@@ -132,7 +132,7 @@
   v = a + c*(b-a);
   w = x = v;
   e = 0;
-  fv = fw = fval = fun (x);
+  fv = fw = fval = fcn (x);
   nfev += 1;
 
   if (isa (a, "single") || isa (b, "single") || isa (fval, "single"))
@@ -199,7 +199,7 @@
 
     ## f must not be evaluated too close to x.
     u = x + max (abs (d), tol) * (sign (d) + (d == 0));
-    fu = fun (u);
+    fu = fcn (u);
 
     niter += 1;
 
@@ -275,9 +275,9 @@
 endfunction
 
 ## A helper function that evaluates a function and checks for bad results.
-function fx = guarded_eval (fun, x)
+function fx = guarded_eval (fcn, x)
 
-  fx = fun (x);
+  fx = fcn (x);
   fx = fx(1);
   if (! isreal (fx))
     error ("Octave:fmindbnd:notreal", "fminbnd: non-real value encountered");
@@ -289,7 +289,7 @@
 
 ## A hack for printing a formatted table
 function print_formatted_table (table)
-  printf ("\n Func-count     x          f(x)         Procedure\n");
+  printf ("\n Fcn-count     x          f(x)         Procedure\n");
   for row=table
     printf ("%5.5s        %7.7s    %8.8s\t%s\n",
             int2str (row.funccount), num2str (row.x,"%.5f"),
--- a/scripts/optimization/fminsearch.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/optimization/fminsearch.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,15 +24,15 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {@var{x} =} fminsearch (@var{fun}, @var{x0})
-## @deftypefnx {} {@var{x} =} fminsearch (@var{fun}, @var{x0}, @var{options})
+## @deftypefn  {} {@var{x} =} fminsearch (@var{fcn}, @var{x0})
+## @deftypefnx {} {@var{x} =} fminsearch (@var{fcn}, @var{x0}, @var{options})
 ## @deftypefnx {} {@var{x} =} fminsearch (@var{problem})
 ## @deftypefnx {} {[@var{x}, @var{fval}, @var{exitflag}, @var{output}] =} fminsearch (@dots{})
 ##
 ## Find a value of @var{x} which minimizes the multi-variable function
-## @var{fun}.
+## @var{fcn}.
 ##
-## @var{fun} is a function handle, inline function, or string containing the
+## @var{fcn} is a function handle, inline function, or string containing the
 ## name of the function to evaluate.
 ##
 ## The search begins at the point @var{x0} and iterates using the
@@ -103,7 +103,7 @@
 ##
 ## The fourth output is a structure @var{output} containing runtime
 ## about the algorithm.  Fields in the structure are @code{funcCount}
-## containing the number of function calls to @var{fun}, @code{iterations}
+## containing the number of function calls to @var{fcn}, @code{iterations}
 ## containing the number of iteration steps, @code{algorithm} with the name of
 ## the search algorithm (always:
 ## @nospell{@qcode{"Nelder-Mead simplex direct search"}}), and @code{message}
@@ -146,7 +146,7 @@
     if (! isstruct (problem))
       error ("fminsearch: PROBLEM must be a structure");
     endif
-    fun = problem.objective;
+    fcn = problem.objective;
     x0 = problem.x0;
     if (! strcmp (problem.solver, "fminsearch"))
       error ('fminsearch: problem.solver must be set to "fminsearch"');
@@ -157,7 +157,7 @@
       options = [];
     endif
   elseif (nargin > 1)
-    fun = varargin{1};
+    fcn = varargin{1};
     x0 = varargin{2};
     if (nargin > 2)
       options = varargin{3};
@@ -168,25 +168,25 @@
     endif
   endif
 
-  if (ischar (fun))
-    fun = str2func (fun);
+  if (ischar (fcn))
+    fcn = str2func (fcn);
   endif
 
   if (isempty (options))
     options = struct ();
   endif
 
-  [x, exitflag, output] = nmsmax (fun, x0, options, varargin{:});
+  [x, exitflag, output] = nmsmax (fcn, x0, options, varargin{:});
 
   if (isargout (2))
-    fval = feval (fun, x);
+    fval = feval (fcn, x);
   endif
 
 endfunction
 
 ## NMSMAX  Nelder-Mead simplex method for direct search optimization.
-##        [x, fmax, nf] = NMSMAX(FUN, x0, STOPIT, SAVIT) attempts to
-##        maximize the function FUN, using the starting vector x0.
+##        [x, fmax, nf] = NMSMAX(FCN, x0, STOPIT, SAVIT) attempts to
+##        maximize the function FCN, using the starting vector x0.
 ##        The Nelder-Mead direct search method is used.
 ##        Output arguments:
 ##               x    = vector yielding largest function value found,
@@ -210,8 +210,8 @@
 ##        'SAVE SAVIT x fmax nf' is executed after each inner iteration.
 ##        NB: x0 can be a matrix.  In the output argument, in SAVIT saves,
 ##            and in function calls, x has the same shape as x0.
-##        NMSMAX(fun, x0, STOPIT, SAVIT, P1, P2,...) allows additional
-##        arguments to be passed to fun, via feval(fun,x,P1,P2,...).
+##        NMSMAX(FCN, x0, STOPIT, SAVIT, P1, P2,...) allows additional
+##        arguments to be passed to FCN, via feval(FCN,x,P1,P2,...).
 ## References:
 ## N. J. Higham, Optimization by direct search in matrix computations,
 ##    SIAM J. Matrix Anal. Appl, 14(2): 317-333, 1993.
@@ -270,16 +270,16 @@
 
 endfunction
 
-function [x, exitflag, output] = nmsmax (fun, x, options, varargin)
+function [x, exitflag, output] = nmsmax (fcn, x, options, varargin)
 
   [stopit, savit, dirn, trace, tol, maxiter, tol_f, outfcn] = ...
                                                     parse_options (options, x);
 
   if (strcmpi (optimget (options, "FunValCheck", "off"), "on"))
     ## Replace fcn with a guarded version.
-    fun = @(x) guarded_eval (fun, x, varargin{:});
+    fcn = @(x) guarded_eval (fcn, x, varargin{:});
   else
-    fun = @(x) real (fun (x, varargin{:}));
+    fcn = @(x) real (fcn (x, varargin{:}));
   endif
 
   x0 = x(:);  # Work with column vector internally.
@@ -288,7 +288,7 @@
   V = [zeros(n,1) eye(n)];
   f = zeros (n+1,1);
   V(:,1) = x0;
-  f(1) = dirn * fun (x);
+  f(1) = dirn * fcn (x);
   fmax_old = f(1);
   nf = 1;
 
@@ -308,7 +308,7 @@
     for j = 2:n+1
       V(j-1,j) = x0(j-1) + alpha(1);
       x(:) = V(:,j);
-      f(j) = dirn * fun (x);
+      f(j) = dirn * fcn (x);
     endfor
   else
     ## Right-angled simplex based on co-ordinate axes.
@@ -316,7 +316,7 @@
     for j = 2:n+1
       V(:,j) = x0 + alpha(j)*V(:,j);
       x(:) = V(:,j);
-      f(j) = dirn * fun (x);
+      f(j) = dirn * fcn (x);
     endfor
   endif
   nf += n;
@@ -419,14 +419,14 @@
     vbar = (sum (V(:,1:n)')/n)';  # Mean value
     vr = (1 + alpha)*vbar - alpha*V(:,n+1);
     x(:) = vr;
-    fr = dirn * fun (x);
+    fr = dirn * fcn (x);
     nf += 1;
     vk = vr;  fk = fr; how = "reflect";
     if (fr > f(n))
       if (fr > f(1))
         ve = gamma*vr + (1-gamma)*vbar;
         x(:) = ve;
-        fe = dirn * fun (x);
+        fe = dirn * fcn (x);
         nf += 1;
         if (fe > f(1))
           vk = ve;
@@ -443,7 +443,7 @@
       endif
       vc = beta*vt + (1-beta)*vbar;
       x(:) = vc;
-      fc = dirn * fun (x);
+      fc = dirn * fcn (x);
       nf += 1;
       if (fc > f(n))
         vk = vc; fk = fc;
@@ -452,12 +452,12 @@
         for j = 2:n
           V(:,j) = (V(:,1) + V(:,j))/2;
           x(:) = V(:,j);
-          f(j) = dirn * fun (x);
+          f(j) = dirn * fcn (x);
         endfor
         nf += n-1;
         vk = (V(:,1) + V(:,n+1))/2;
         x(:) = vk;
-        fk = dirn * fun (x);
+        fk = dirn * fcn (x);
         nf += 1;
         how = "shrink";
       endif
@@ -497,9 +497,9 @@
 endfunction
 
 ## A helper function that evaluates a function and checks for bad results.
-function y = guarded_eval (fun, x, varargin)
+function y = guarded_eval (fcn, x, varargin)
 
-  y = fun (x, varargin{:});
+  y = fcn (x, varargin{:});
 
   if (! (isreal (y)))
     error ("fminsearch:notreal", "fminsearch: non-real value encountered");
--- a/scripts/optimization/fminunc.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/optimization/fminunc.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,12 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} fminunc (@var{fcn}, @var{x0})
-## @deftypefnx {} {} fminunc (@var{fcn}, @var{x0}, @var{options})
+## @deftypefn  {} {@var{x} =} fminunc (@var{fcn}, @var{x0})
+## @deftypefnx {} {@var{x} =} fminunc (@var{fcn}, @var{x0}, @var{options})
+## @deftypefnx {} {[@var{x}, @var{fval}] =} fminunc (@var{fcn}, @dots{})
+## @deftypefnx {} {[@var{x}, @var{fval}, @var{info}] =} fminunc (@var{fcn}, @dots{})
+## @deftypefnx {} {[@var{x}, @var{fval}, @var{info}, @var{output}] =} fminunc (@var{fcn}, @dots{})
+## @deftypefnx {} {[@var{x}, @var{fval}, @var{info}, @var{output}, @var{grad}] =} fminunc (@var{fcn}, @dots{})
 ## @deftypefnx {} {[@var{x}, @var{fval}, @var{info}, @var{output}, @var{grad}, @var{hess}] =} fminunc (@var{fcn}, @dots{})
 ## Solve an unconstrained optimization problem defined by the function
 ## @var{fcn}.
@@ -33,7 +37,7 @@
 ## @code{fminunc} attempts to determine a vector @var{x} such that
 ## @code{@var{fcn} (@var{x})} is a local minimum.
 ##
-## @var{fun} is a function handle, inline function, or string containing the
+## @var{fcn} is a function handle, inline function, or string containing the
 ## name of the function to evaluate.  @var{fcn} should accept a vector (array)
 ## defining the unknown variables, and return the objective function value,
 ## optionally with gradient.
@@ -409,12 +413,12 @@
 endfunction
 
 ## A helper function that evaluates a function and checks for bad results.
-function [fx, gx] = guarded_eval (fun, x)
+function [fx, gx] = guarded_eval (fcn, x)
 
   if (nargout > 1)
-    [fx, gx] = fun (x);
+    [fx, gx] = fcn (x);
   else
-    fx = fun (x);
+    fx = fcn (x);
     gx = [];
   endif
 
--- a/scripts/optimization/fsolve.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/optimization/fsolve.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,12 +24,15 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} fsolve (@var{fcn}, @var{x0})
-## @deftypefnx {} {} fsolve (@var{fcn}, @var{x0}, @var{options})
+## @deftypefn  {} {@var{x} =} fsolve (@var{fcn}, @var{x0})
+## @deftypefnx {} {@var{x} =} fsolve (@var{fcn}, @var{x0}, @var{options})
+## @deftypefnx {} {[@var{x}, @var{fval}] =} fsolve (@dots{})
+## @deftypefnx {} {[@var{x}, @var{fval}, @var{info}] =} fsolve (@dots{})
+## @deftypefnx {} {[@var{x}, @var{fval}, @var{info}, @var{output}] =} fsolve (@dots{})
 ## @deftypefnx {} {[@var{x}, @var{fval}, @var{info}, @var{output}, @var{fjac}] =} fsolve (@dots{})
 ## Solve a system of nonlinear equations defined by the function @var{fcn}.
 ##
-## @var{fun} is a function handle, inline function, or string containing the
+## @var{fcn} is a function handle, inline function, or string containing the
 ## name of the function to evaluate.  @var{fcn} should accept a vector (array)
 ## defining the unknown variables, and return a vector of left-hand sides of
 ## the equations.  Right-hand sides are defined to be zeros.  In other words,
@@ -149,7 +152,7 @@
 ## recent vector.  A short example how this can be achieved follows:
 ##
 ## @example
-## function [fval, fjac] = user_func (x, optimvalues, state)
+## function [fval, fjac] = user_fcn (x, optimvalues, state)
 ## persistent sav = [], sav0 = [];
 ## if (nargin == 1)
 ##   ## evaluation call
@@ -170,7 +173,7 @@
 ##
 ## ## @dots{}
 ##
-## fsolve (@@user_func, x0, optimset ("OutputFcn", @@user_func, @dots{}))
+## fsolve (@@user_fcn, x0, optimset ("OutputFcn", @@user_fcn, @dots{}))
 ## @end example
 ## @seealso{fzero, optimset}
 ## @end deftypefn
@@ -506,12 +509,12 @@
 endfunction
 
 ## A helper function that evaluates a function and checks for bad results.
-function [fx, jx] = guarded_eval (fun, x, complexeqn)
+function [fx, jx] = guarded_eval (fcn, x, complexeqn)
 
   if (nargout > 1)
-    [fx, jx] = fun (x);
+    [fx, jx] = fcn (x);
   else
-    fx = fun (x);
+    fx = fcn (x);
     jx = [];
   endif
 
@@ -672,7 +675,7 @@
 %! assert (norm (c - c_opt, Inf) < tol);
 %! assert (norm (fval) < norm (noise));
 
-%!function y = cfun (x)
+%!function y = cfcn (x)
 %!  y(1) = (1+i)*x(1)^2 - (1-i)*x(2) - 2;
 %!  y(2) = sqrt (x(1)*x(2)) - (1-2i)*x(3) + (3-4i);
 %!  y(3) = x(1) * x(2) - x(3)^2 + (3+2i);
@@ -682,7 +685,7 @@
 %! x_opt = [-1+i, 1-i, 2+i];
 %! x = [i, 1, 1+i];
 %!
-%! [x, f, info] = fsolve (@cfun, x, optimset ("ComplexEqn", "on"));
+%! [x, f, info] = fsolve (@cfcn, x, optimset ("ComplexEqn", "on"));
 %! tol = 1e-5;
 %! assert (norm (f) < tol);
 %! assert (norm (x - x_opt, Inf) < tol);
--- a/scripts/optimization/fzero.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/optimization/fzero.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,12 +24,14 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} fzero (@var{fun}, @var{x0})
-## @deftypefnx {} {} fzero (@var{fun}, @var{x0}, @var{options})
+## @deftypefn  {} {@var{x} =} fzero (@var{fcn}, @var{x0})
+## @deftypefnx {} {@var{x} =} fzero (@var{fcn}, @var{x0}, @var{options})
+## @deftypefnx {} {[@var{x}, @var{fval}] =} fzero (@dots{})
+## @deftypefnx {} {[@var{x}, @var{fval}, @var{info}] =} fzero (@dots{})
 ## @deftypefnx {} {[@var{x}, @var{fval}, @var{info}, @var{output}] =} fzero (@dots{})
 ## Find a zero of a univariate function.
 ##
-## @var{fun} is a function handle, inline function, or string containing the
+## @var{fcn} is a function handle, inline function, or string containing the
 ## name of the function to evaluate.
 ##
 ## @var{x0} should be a two-element vector specifying two points which
@@ -38,7 +40,7 @@
 ## following must hold
 ##
 ## @example
-## sign (@var{fun}(@var{x0}(1))) * sign (@var{fun}(@var{x0}(2))) <= 0
+## sign (@var{fcn}(@var{x0}(1))) * sign (@var{fcn}(@var{x0}(2))) <= 0
 ## @end example
 ##
 ## If @var{x0} is a single scalar then several nearby and distant values are
@@ -125,10 +127,10 @@
 ## PKG_ADD: ## Discard result to avoid polluting workspace with ans at startup.
 ## PKG_ADD: [~] = __all_opts__ ("fzero");
 
-function [x, fval, info, output] = fzero (fun, x0, options = struct ())
+function [x, fval, info, output] = fzero (fcn, x0, options = struct ())
 
   ## Get default options if requested.
-  if (nargin == 1 && ischar (fun) && strcmp (fun, "defaults"))
+  if (nargin == 1 && ischar (fcn) && strcmp (fcn, "defaults"))
     x = struct ("Display", "notify", "FunValCheck", "off",
                 "MaxFunEvals", Inf, "MaxIter", Inf,
                 "OutputFcn", [], "TolX", eps);
@@ -139,8 +141,8 @@
     print_usage ();
   endif
 
-  if (ischar (fun))
-    fun = str2func (fun);
+  if (ischar (fcn))
+    fcn = str2func (fcn);
   endif
 
   displev = optimget (options, "Display", "notify");
@@ -164,8 +166,8 @@
   mu = 0.5;
 
   if (funvalchk)
-    ## Replace fun with a guarded version.
-    fun = @(x) guarded_eval (fun, x);
+    ## Replace fcn with a guarded version.
+    fcn = @(x) guarded_eval (fcn, x);
   endif
 
   info = 0;  # The default exit flag if number of iterations exceeded.
@@ -176,20 +178,20 @@
 
   ## Prepare...
   a = x0(1);
-  fa = fun (a);
+  fa = fcn (a);
   nfev = 1;
   if (length (x0) > 1)
     b = x0(2);
-    fb = fun (b);
+    fb = fcn (b);
     nfev += 1;
   else
     ## Try to find a value for b which brackets a zero-crossing
     if (displev == 1)
       printf ( ...
         "\nSearch for an interval around %g containing a sign change:\n", a);
-      printf (" Func-count    a          f(a)             b          ");
+      printf (" Fcn-count    a          f(a)             b          ");
       printf ("f(b)        Procedure\n");
-      fmt_str = " %4d   %13.6g %13.6g %13.6g %13.6g   %s\n";
+      fmt_str = " %4d  %13.6g %13.6g %13.6g %13.6g   %s\n";
     endif
 
     ## For very small values, switch to absolute rather than relative search
@@ -204,7 +206,7 @@
     ## Search in an ever-widening range around the initial point.
     for srch = [-.01 +.025 -.05 +.10 -.25 +.50 -1 +2.5 -5 +10 -50 +100 -500 +1000]
       b = aa + aa*srch;
-      fb = fun (b);
+      fb = fcn (b);
       nfev += 1;
       if (displev == 1)
         printf (fmt_str, nfev, a, fa, b, fb, "search");
@@ -231,8 +233,8 @@
 
   if (displev == 1)
     printf ("\nSearch for a zero in the interval [%g, %g]:\n", a, b);
-    disp (" Func-count    x          f(x)             Procedure");
-    fmt_str = " %4d   %13.6g %13.6g        %s\n";
+    disp (" Fcn-count    x          f(x)             Procedure");
+    fmt_str = " %4d  %13.6g %13.6g        %s\n";
   endif
 
   slope0 = (fb - fa) / (b - a);
@@ -343,7 +345,7 @@
 
     ## Calculate new point.
     x = c;
-    fval = fc = fun (c);
+    fval = fc = fcn (c);
     niter += 1; nfev += 1;
     if (displev == 1)
       printf (fmt_str, nfev, x, fc, "interpolation");
@@ -438,9 +440,9 @@
 endfunction
 
 ## A helper function that evaluates a function and checks for bad results.
-function fx = guarded_eval (fun, x)
+function fx = guarded_eval (fcn, x)
 
-  fx = fun (x);
+  fx = fcn (x);
   fx = fx(1);
   if (! isreal (fx))
     error ("Octave:fzero:notreal", "fzero: non-real value encountered");
--- a/scripts/optimization/optimget.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/optimization/optimget.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,43 +24,43 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} optimget (@var{options}, @var{parname})
-## @deftypefnx {} {} optimget (@var{options}, @var{parname}, @var{default})
-## Return the specific option @var{parname} from the optimization options
+## @deftypefn  {} {@var{optval} =} optimget (@var{options}, @var{optname})
+## @deftypefnx {} {@var{optval} =} optimget (@var{options}, @var{optname}, @var{default})
+## Return the specific option @var{optname} from the optimization options
 ## structure @var{options} created by @code{optimset}.
 ##
-## If @var{parname} is not defined then return @var{default} if supplied,
+## If @var{optname} is not defined then return @var{default} if supplied,
 ## otherwise return an empty matrix.
 ## @seealso{optimset}
 ## @end deftypefn
 
-function retval = optimget (options, parname, default)
+function optval = optimget (options, optname, default)
 
-  if (nargin < 2 || ! isstruct (options) || ! ischar (parname))
+  if (nargin < 2 || ! isstruct (options) || ! ischar (optname))
     print_usage ();
   endif
 
   ## Expand partial-length names into full names
   opts = __all_opts__ ();
-  idx = strncmpi (opts, parname, length (parname));
+  idx = strncmpi (opts, optname, length (optname));
   nmatch = sum (idx);
 
   if (nmatch == 1)
-    parname = opts{idx};
+    optname = opts{idx};
   elseif (nmatch == 0)
-    warning ("optimget: unrecognized option: %s", parname);
+    warning ("optimget: unrecognized option: %s", optname);
   else
     fmt = sprintf ("optimget: ambiguous option: %%s (%s%%s)",
                    repmat ("%s, ", 1, nmatch-1));
-    warning (fmt, parname, opts{idx});
+    warning (fmt, optname, opts{idx});
   endif
 
-  if (isfield (options, parname) && ! isempty (options.(parname)))
-    retval = options.(parname);
+  if (isfield (options, optname) && ! isempty (options.(optname)))
+    optval = options.(optname);
   elseif (nargin > 2)
-    retval = default;
+    optval = default;
   else
-    retval = [];
+    optval = [];
   endif
 
 endfunction
--- a/scripts/optimization/private/__fdjac__.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/optimization/private/__fdjac__.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} __fdjac__ (@var{fcn}, @var{x}, @var{fvec}, @var{typicalx}, @var{cdif}, @var{err})
+## @deftypefn {} {@var{fjac} =} __fdjac__ (@var{fcn}, @var{x}, @var{fvec}, @var{typicalx}, @var{cdif}, @var{err})
 ## Undocumented internal function.
 ## @end deftypefn
 
--- a/scripts/optimization/qp.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/optimization/qp.m	Mon Aug 29 13:58:00 2022 +0200
@@ -347,7 +347,12 @@
   in_infeasible = (n_in > 0 && any (Ain*x0-bin < -rtol*(1+abs (bin))));
 
   info = 0;
-  if (eq_infeasible || in_infeasible)
+
+  if (isdefinite (H) != 1)
+    info = 2;
+  endif
+
+  if (info == 0 && (eq_infeasible || in_infeasible))
     ## The initial guess is not feasible.
     ## First, define an xbar that is feasible with respect to the
     ## equality constraints.
@@ -454,3 +459,9 @@
 %!
 %! assert (isstruct (INFO) && isfield (INFO, "info") && (INFO.info == 0));
 %! assert ([x obj_qp], [1.0 0.5], eps);
+
+%!test <*61762>
+%! [x, obj, info] = qp ([], [21, 30, 39; 30, 45, 60; 39, 60, 81], [-40; -65; -90]);
+%! assert (x, zeros (3, 1));
+%! assert (obj, 0);
+%! assert (info.info, 2);
--- a/scripts/optimization/sqp.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/optimization/sqp.m	Mon Aug 29 13:58:00 2022 +0200
@@ -213,14 +213,14 @@
   if (iscell (objf))
     switch (numel (objf))
       case 1
-        obj_fun = objf{1};
-        obj_grd = @(x, obj) fd_obj_grd (x, obj, obj_fun);
+        obj_fcn = objf{1};
+        obj_grd = @(x, obj) fd_obj_grd (x, obj, obj_fcn);
       case 2
-        obj_fun = objf{1};
+        obj_fcn = objf{1};
         obj_grd = objf{2};
         have_grd = 1;
       case 3
-        obj_fun = objf{1};
+        obj_fcn = objf{1};
         obj_grd = objf{2};
         obj_hess = objf{3};
         have_grd = 1;
@@ -229,31 +229,31 @@
         error ("sqp: invalid objective function specification");
     endswitch
   else
-    obj_fun = objf;   # No cell array, only obj_fun set
-    obj_grd = @(x, obj) fd_obj_grd (x, obj, obj_fun);
+    obj_fcn = objf;   # No cell array, only obj_fcn set
+    obj_grd = @(x, obj) fd_obj_grd (x, obj, obj_fcn);
   endif
 
-  ce_fun = @empty_cf;
+  ce_fcn = @empty_cf;
   ce_grd = @empty_jac;
   if (nargin > 2)
     if (iscell (cef))
       switch (numel (cef))
         case 1
-          ce_fun = cef{1};
-          ce_grd = @(x) fd_ce_jac (x, ce_fun);
+          ce_fcn = cef{1};
+          ce_grd = @(x) fd_ce_jac (x, ce_fcn);
         case 2
-          ce_fun = cef{1};
+          ce_fcn = cef{1};
           ce_grd = cef{2};
         otherwise
           error ("sqp: invalid equality constraint function specification");
       endswitch
     elseif (! isempty (cef))
-      ce_fun = cef;   # No cell array, only constraint equality function set
-      ce_grd = @(x) fd_ce_jac (x, ce_fun);
+      ce_fcn = cef;   # No cell array, only constraint equality function set
+      ce_grd = @(x) fd_ce_jac (x, ce_fcn);
     endif
   endif
 
-  ci_fun = @empty_cf;
+  ci_fcn = @empty_cf;
   ci_grd = @empty_jac;
   if (nargin > 3)
     ## constraint function given by user with possible gradient
@@ -274,15 +274,15 @@
       if (iscell (cif))
         switch (length (cif))
           case 1
-            ci_fun = cif{1};
+            ci_fcn = cif{1};
           case 2
-            ci_fun = cif{1};
+            ci_fcn = cif{1};
             ci_grd = cif{2};
           otherwise
            error ("sqp: invalid inequality constraint function specification");
         endswitch
       elseif (! isempty (cif))
-        ci_fun = cif;   # No cell array, only constraint inequality function set
+        ci_fcn = cif;   # No cell array, only constraint inequality function set
       endif
     else
       ## constraint inequality function with bounds present
@@ -322,7 +322,7 @@
         error ("sqp: upper bound smaller than lower bound");
       endif
       bounds_grad = [lb_grad; ub_grad];
-      ci_fun = @(x) cf_ub_lb (x, lb_idx, ub_idx, globals);
+      ci_fcn = @(x) cf_ub_lb (x, lb_idx, ub_idx, globals);
       ci_grd = @(x) cigrad_ub_lb (x, bounds_grad, globals);
     endif
 
@@ -350,15 +350,15 @@
   ## Seed x with initial guess and evaluate objective function, constraints,
   ## and gradients at initial value x0.
   ##
-  ## obj_fun   -- objective function
+  ## obj_fcn   -- objective function
   ## obj_grad  -- objective gradient
-  ## ce_fun    -- equality constraint functions
-  ## ci_fun    -- inequality constraint functions
+  ## ce_fcn    -- equality constraint functions
+  ## ci_fcn    -- inequality constraint functions
   ## A == [grad_{x_1} cx_fun, grad_{x_2} cx_fun, ..., grad_{x_n} cx_fun]^T
   x = x0;
 
-  obj = feval (obj_fun, x0);
-  globals.nfun = 1;
+  obj = feval (obj_fcn, x0);
+  globals.nfev = 1;
 
   if (have_grd)
     c = feval (obj_grd, x0);
@@ -374,10 +374,10 @@
     B = eye (n, n);
   endif
 
-  ce = feval (ce_fun, x0);
+  ce = feval (ce_fcn, x0);
   F = feval (ce_grd, x0);
 
-  ci = feval (ci_fun, x0);
+  ci = feval (ci_fcn, x0);
   C = feval (ci_grd, x0);
 
   A = [F; C];
@@ -391,7 +391,7 @@
   info = 0;
   iter = 0;
   ## report ();  # Called with no arguments to initialize reporting
-  ## report (iter, qp_iter, alpha, __sqp_nfun__, obj);
+  ## report (iter, qp_iter, alpha, __sqp_nfev__, obj);
 
   while (++iter < iter_max)
 
@@ -445,7 +445,7 @@
     ## Choose mu such that p is a descent direction for the chosen
     ## merit function phi.
     [x_new, alpha, obj_new, globals] = ...
-        linesearch_L1 (x, p, obj_fun, obj_grd, ce_fun, ci_fun, lambda, ...
+        linesearch_L1 (x, p, obj_fcn, obj_grd, ce_fcn, ci_fcn, lambda, ...
                        obj, c, globals);
 
     delx = x_new - x;
@@ -463,10 +463,10 @@
       c_new = feval (obj_grd, x_new, obj_new);
     endif
 
-    ce_new = feval (ce_fun, x_new);
+    ce_new = feval (ce_fcn, x_new);
     F_new = feval (ce_grd, x_new);
 
-    ci_new = feval (ci_fun, x_new);
+    ci_new = feval (ci_fcn, x_new);
     C_new = feval (ci_grd, x_new);
 
     A_new = [F_new; C_new];
@@ -533,7 +533,7 @@
 
     A = A_new;
 
-    ## report (iter, qp_iter, alpha, __sqp_nfun__, obj);
+    ## report (iter, qp_iter, alpha, __sqp_nfev__, obj);
 
   endwhile
 
@@ -542,24 +542,24 @@
     info = 103;
   endif
 
-  nf = globals.nfun;
+  nf = globals.nfev;
 
 endfunction
 
 
-function [merit, obj, globals] = phi_L1 (obj, obj_fun, ce_fun, ci_fun, ...
+function [merit, obj, globals] = phi_L1 (obj, obj_fcn, ce_fcn, ci_fcn, ...
                                          x, mu, globals)
 
-  ce = feval (ce_fun, x);
-  ci = feval (ci_fun, x);
+  ce = feval (ce_fcn, x);
+  ci = feval (ci_fcn, x);
 
   idx = ci < 0;
 
   con = [ce; ci(idx)];
 
   if (isempty (obj))
-    obj = feval (obj_fun, x);
-    globals.nfun += 1;
+    obj = feval (obj_fcn, x);
+    globals.nfev += 1;
   endif
 
   merit = obj;
@@ -573,7 +573,7 @@
 
 
 function [x_new, alpha, obj, globals] = ...
-  linesearch_L1 (x, p, obj_fun, obj_grd, ce_fun, ci_fun, lambda, obj, c, globals)
+  linesearch_L1 (x, p, obj_fcn, obj_grd, ce_fcn, ci_fcn, lambda, obj, c, globals)
 
   ## Choose parameters
   ##
@@ -593,13 +593,13 @@
 
   alpha = 1;
 
-  ce = feval (ce_fun, x);
+  ce = feval (ce_fcn, x);
 
-  [phi_x_mu, obj, globals] = phi_L1 (obj, obj_fun, ce_fun, ci_fun, x, ...
+  [phi_x_mu, obj, globals] = phi_L1 (obj, obj_fcn, ce_fcn, ci_fcn, x, ...
                                      mu, globals);
 
   D_phi_x_mu = c' * p;
-  d = feval (ci_fun, x);
+  d = feval (ci_fcn, x);
   ## only those elements of d corresponding
   ## to violated constraints should be included.
   idx = d < 0;
@@ -609,7 +609,7 @@
   endif
 
   while (1)
-    [p1, obj, globals] = phi_L1 ([], obj_fun, ce_fun, ci_fun, ...
+    [p1, obj, globals] = phi_L1 ([], obj_fcn, ce_fcn, ci_fcn, ...
                                  x+alpha*p, mu, globals);
     p2 = phi_x_mu+eta*alpha*D_phi_x_mu;
     if (p1 > p2)
@@ -668,9 +668,9 @@
 endfunction
 
 
-function grd = fd_obj_grd (x, obj, obj_fun)
+function grd = fd_obj_grd (x, obj, obj_fcn)
 
-  grd = fdgrd (obj_fun, x, obj);
+  grd = fdgrd (obj_fcn, x, obj);
 
 endfunction
 
@@ -689,9 +689,9 @@
 endfunction
 
 
-function jac = fd_ce_jac (x, ce_fun)
+function jac = fd_ce_jac (x, ce_fcn)
 
-  jac = fdjac (ce_fun, x);
+  jac = fdjac (ce_fcn, x);
 
 endfunction
 
@@ -734,12 +734,12 @@
 endfunction
 
 ## Utility function used to debug sqp
-function report (iter, qp_iter, alpha, nfun, obj)
+function report (iter, qp_iter, alpha, nfev, obj)
 
   if (nargin == 0)
-    printf ("  Itn ItQP     Step  Nfun     Objective\n");
+    printf ("  Itn ItQP     Step  Nfev     Objective\n");
   else
-    printf ("%5d %4d %8.1g %5d %13.6e\n", iter, qp_iter, alpha, nfun, obj);
+    printf ("%5d %4d %8.1g %5d %13.6e\n", iter, qp_iter, alpha, nfev, obj);
   endif
 
 endfunction
--- a/scripts/path/matlabroot.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/path/matlabroot.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} matlabroot ()
+## @deftypefn {} {@var{dir} =} matlabroot ()
 ## Return the name of the top-level Octave installation directory.
 ##
 ## This is an alias for the function @w{@code{OCTAVE_HOME}} provided for
@@ -32,9 +32,9 @@
 ## @seealso{OCTAVE_HOME}
 ## @end deftypefn
 
-function retval = matlabroot ()
+function dir = matlabroot ()
 
-  retval = OCTAVE_HOME ();
+  dir = OCTAVE_HOME ();
 
 endfunction
 
--- a/scripts/path/savepath.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/path/savepath.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} savepath ()
-## @deftypefnx {} {} savepath (@var{file})
+## @deftypefn  {} {} savepath
+## @deftypefnx {} {} savepath @var{file}
 ## @deftypefnx {} {@var{status} =} savepath (@dots{})
 ## Save the unique portion of the current function search path that is
 ## not set during Octave's initialization process to @var{file}.
@@ -46,7 +46,7 @@
 ## @seealso{path, addpath, rmpath, genpath, pathdef}
 ## @end deftypefn
 
-function retval = savepath (file)
+function status = savepath (file)
 
   beginstring = "## Begin savepath auto-created section, do not edit";
   endstring   = "## End savepath auto-created section";
@@ -170,8 +170,8 @@
 
     fprintf (fid, "%s\n", post{:});
   unwind_protect_cleanup
-    status = fclose (fid);
-    if (status < 0)
+    sts = fclose (fid);
+    if (sts < 0)
       error ("savepath: could not close savefile after writing, %s", file);
     elseif (nargin == 0)
       warning ("off", "backtrace", "local");
@@ -181,7 +181,7 @@
   end_unwind_protect
 
   if (nargout > 0)
-    retval = 0;
+    status = 0;
   endif
 
 endfunction
--- a/scripts/pkg/pkg.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/pkg/pkg.m	Mon Aug 29 13:58:00 2022 +0200
@@ -534,6 +534,10 @@
         if (octave_forge)
           [urls, local_files] = cellfun ("get_forge_download", files,
                                          "uniformoutput", false);
+          if (verbose)
+            fprintf ("downloading tarball(s) from:%s\n", ...
+                     sprintf ("\n- %s", urls{:}));
+          endif
           [files, succ] = cellfun ("urlwrite", urls, local_files,
                                    "uniformoutput", false);
           succ = [succ{:}];
--- a/scripts/pkg/private/configure_make.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/pkg/private/configure_make.m	Mon Aug 29 13:58:00 2022 +0200
@@ -53,13 +53,13 @@
     endif
 
     if (ispc () && ! isunix ())
-      # replace all backslashes with forward slashes
+      ## Replace all backslashes with forward slashes
       mkoctfile_program = strrep (mkoctfile_program, '\', '/');
       octave_config_program = strrep (octave_config_program, '\', '/');
       octave_binary = strrep (octave_binary, '\', '/');
     endif
 
-    # escape spaces in file paths unless they are already escaped
+    ## Escape spaces in file paths unless they are already escaped
     mkoctfile_program = regexprep (mkoctfile_program, '([^\\]) ', '$1\\ ');
     octave_config_program = regexprep (octave_config_program, ...
                                        '([^\\]) ', '$1\\ ');
--- a/scripts/plot/appearance/axis.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/appearance/axis.m	Mon Aug 29 13:58:00 2022 +0200
@@ -83,9 +83,16 @@
 ## @item @qcode{"manual"}
 ## Fix the current axes limits.
 ##
+## @item @qcode{"tickaligned"}
+## Fix axes to the limits of the closest ticks.
+##
 ## @item @qcode{"tight"}
 ## Fix axes to the limits of the data.
 ##
+## @item @qcode{"padded"}
+## Fix axes to the limits of the data plus margins of about 7% of the
+## data extent.
+##
 ## @item @qcode{"image"}
 ## Equivalent to @qcode{"tight"} and @qcode{"equal"}.
 ##
@@ -213,8 +220,10 @@
       ## aspect ratio
       elseif (strcmpi (opt, "image"))
         __axis__ (ca, "equal");
-        set (ca, "plotboxaspectratiomode", "auto");
-        __do_tight_option__ (ca);
+        set (ca, "plotboxaspectratiomode", "auto", ...
+                 "xlimmode", "auto", "ylimmode", "auto", ...
+                 "zlimmode", "auto", ...
+                 "xlimitmethod", "tight", "ylimitmethod", "tight");
       elseif (strcmpi (opt, "square"))
         set (ca, "dataaspectratiomode", "auto",
                  "plotboxaspectratio", [1, 1, 1]);
@@ -280,10 +289,26 @@
         ## fixes the axis limits
         set (ca, "xlimmode", "manual", "ylimmode", "manual",
                  "zlimmode", "manual");
+      elseif (strcmpi (opt, "tickaligned"))
+        ## sets the axis limits to closest ticks.
+        set (ca, "xlimmode", "auto", "ylimmode", "auto", ...
+                 "zlimmode", "auto", ...
+                 "xlimitmethod", "tickaligned", ...
+                 "ylimitmethod", "tickaligned", ...
+                 "zlimitmethod", "tickaligned");
       elseif (strcmpi (opt, "tight"))
         ## sets the axis limits to the min and max of all data.
-        __do_tight_option__ (ca);
-
+        set (ca, "xlimmode", "auto", "ylimmode", "auto", ...
+                 "zlimmode", "auto", ...
+                 "xlimitmethod", "tight", "ylimitmethod", "tight",
+                 "zlimitmethod", "tight");
+      elseif (strcmpi (opt, "padded"))
+        ## sets the axis limits to the min and max of all data plus padding.
+        set (ca, "xlimmode", "auto", "ylimmode", "auto", ...
+                 "zlimmode", "auto", ...
+                 "xlimitmethod", "padded", ...
+                 "ylimitmethod", "padded", ...
+                 "zlimitmethod", "padded");
       ## visibility
       elseif (strcmpi (opt, "on"))
         set (ca, "visible", "on");
@@ -376,87 +401,6 @@
 
 endfunction
 
-## Find the limits for axis ("tight").
-## AX should be one of "x", "y", or "z".
-function lims = __get_tight_lims__ (ca, ax)
-
-  kids = findobj (ca, "-property", [ax "data"]);
-  ## The data properties for hggroups mirror their children.
-  ## Exclude the redundant hggroup values.
-  hg_kids = findobj (kids, "type", "hggroup");
-  kids = setdiff (kids, hg_kids);
-  if (isempty (kids))
-    ## Return the current limits.
-    ## FIXME: Is this the correct thing to do?
-    lims = get (ca, [ax "lim"]);
-  else
-    data = get (kids, [ax "data"]);
-    types = get (kids, "type");
-
-    scale = get (ca, [ax "scale"]);
-    if (! iscell (data))
-      data = {data};
-    endif
-
-    ## Extend image data one pixel
-    idx = strcmp (types, "image");
-    if (any (idx) && (ax == "x" || ax == "y"))
-      imdata = data(idx);
-      px = arrayfun (@__image_pixel_size__, kids(idx), "uniformoutput", false);
-      ipx = ifelse (ax == "x", 1, 2);
-      imdata = cellfun (@(x,dx) [(min (x) - dx(ipx)), (max (x) + dx(ipx))],
-                        imdata, px, "uniformoutput", false);
-      data(idx) = imdata;
-    endif
-
-    if (strcmp (scale, "log"))
-      tmp = data;
-      data = cellfun (@(x) x(x>0), tmp, "uniformoutput", false);
-      n = cellfun ("isempty", data);
-      data(n) = cellfun (@(x) x(x<0), tmp(n), "uniformoutput", false);
-    endif
-    data = cellfun (@(x) x(isfinite (x)), data, "uniformoutput", false);
-    data = data(! cellfun ("isempty", data));
-    if (! isempty (data))
-      ## Change data from cell array of various sizes to a single column vector
-      data = cat (1, cellindexmat (data, ":"){:});
-      lims = [min(data), max(data)];
-    else
-      lims = [0, 1];
-    endif
-  endif
-
-endfunction
-
-function __do_tight_option__ (ca)
-
-  xlim = __get_tight_lims__ (ca, "x");
-  if (all (xlim == 0))
-    xlim = [-eps, +eps];
-  elseif (diff (xlim == 0))
-    xlim .*= [1-eps, 1+eps];
-  endif
-  ylim = __get_tight_lims__ (ca, "y");
-  if (all (ylim == 0))
-    ylim = [-eps, +eps];
-  elseif (diff (ylim == 0))
-    ylim .*= [1-eps, 1+eps];
-  endif
-  set (ca, "xlim", xlim, "ylim", ylim);
-  nd = __calc_dimensions__ (ca);
-  is3dview = (get (ca, "view")(2) != 90);
-  if (nd > 2 && is3dview)
-    zlim = __get_tight_lims__ (ca, "z");
-    if (all (zlim == 0))
-      zlim = [-eps, +eps];
-    elseif (diff (zlim == 0))
-      zlim .*= [1-eps, 1+eps];
-    endif
-    set (ca, "zlim", zlim);
-  endif
-
-endfunction
-
 
 %!demo
 %! clf;
@@ -618,6 +562,38 @@
 %! axis tight;
 %! title ('"tight" on loglog plot');
 
+%!demo
+%! clf;
+%! x = y = 0.5:0.5:12;
+%! subplot (3,1,1);
+%! plot (x, y, "-s");
+%! axis tickaligned
+%! title ("tickaligned");
+%! subplot (3,1,2);
+%! plot (x, y, "-s");
+%! axis padded
+%! title ("padded");
+%! subplot (3,1,3);
+%! plot (x, y, "-s");
+%! axis tight
+%! title ("tight");
+
+%!demo
+%! clf;
+%! x = y = 0.5:0.5:12;
+%! subplot (3,1,1);
+%! loglog (x, y, "-s");
+%! axis tickaligned
+%! title ("tickaligned");
+%! subplot (3,1,2);
+%! loglog (x, y, "-s");
+%! axis padded
+%! title ("padded");
+%! subplot (3,1,3);
+%! loglog (x, y, "-s");
+%! axis tight
+%! title ("tight");
+
 %!test
 %! hf = figure ("visible", "off");
 %! unwind_protect
@@ -655,6 +631,19 @@
 %!   close (hf);
 %! end_unwind_protect
 
+## Test 'axis tight' remains after addition of new data
+%!test
+%! hf = figure ("visible", "off");
+%! unwind_protect
+%!   plot (1:10)
+%!   axis tight;
+%!   assert (axis (), [1 10 1 10]);
+%!   plot (1:11)
+%!   assert (axis (), [1 11 1 11]);
+%! unwind_protect_cleanup
+%!   close (hf);
+%! end_unwind_protect
+
 ## Even on errors, axis can display a figure.
 %!error <LIMITS vector must have .* elements>
 %! hf = figure ("visible", "off");
--- a/scripts/plot/appearance/camlookat.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/appearance/camlookat.m	Mon Aug 29 13:58:00 2022 +0200
@@ -281,7 +281,7 @@
 %! end_unwind_protect
 
 ## compare to Matlab R2016a output
-%!test
+%!test <61532>
 %! hf = figure ("visible", "off");
 %! unwind_protect
 %!   [x, y, z] = peaks ();
--- a/scripts/plot/appearance/campos.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/appearance/campos.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,12 +24,12 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {@var{P} =} campos ()
+## @deftypefn  {} {@var{p} =} campos ()
 ## @deftypefnx {} {} campos ([@var{x} @var{y} @var{z}])
 ## @deftypefnx {} {@var{mode} =} campos ("mode")
 ## @deftypefnx {} {} campos (@var{mode})
-## @deftypefnx {} {} campos (@var{ax}, @dots{})
-## Set or get the camera position.
+## @deftypefnx {} {} campos (@var{hax}, @dots{})
+## Get or set the camera position.
 ##
 ## The default camera position is determined automatically based on the scene.
 ## For example, to get the camera position:
@@ -77,7 +77,7 @@
 ## @end example
 ##
 ## By default, these commands affect the current axis; alternatively, an axis
-## can be specified by the optional argument @var{ax}.
+## can be specified by the optional argument @var{hax}.
 ##
 ## @seealso{camup, camtarget, camva}
 ## @end deftypefn
@@ -161,7 +161,7 @@
 %!   delete (hf);
 %! end_unwind_protect
 
-## test ax input by creating another axis
+## test hax input by creating another axis
 %!test
 %! hf = figure ("visible", "off");
 %! unwind_protect
--- a/scripts/plot/appearance/camroll.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/appearance/camroll.m	Mon Aug 29 13:58:00 2022 +0200
@@ -25,7 +25,7 @@
 
 ## -*- texinfo -*-
 ## @deftypefn  {} {} camroll (@var{theta})
-## @deftypefnx {} {} camroll (@var{ax}, @var{theta})
+## @deftypefnx {} {} camroll (@var{hax}, @var{theta})
 ## Roll the camera.
 ##
 ## Roll the camera clockwise by @var{theta} degrees.
@@ -60,7 +60,7 @@
 ## @end example
 ##
 ## By default, these commands affect the current axis; alternatively, an axis
-## can be specified by the optional argument @var{ax}.
+## can be specified by the optional argument @var{hax}.
 ##
 ## @seealso{camzoom, camorbit, camlookat, camup}
 ## @end deftypefn
@@ -149,7 +149,7 @@
 %!   close (hf);
 %! end_unwind_protect
 
-## test ax input by creating another axis
+## test hax input by creating another axis
 %!test
 %! hf = figure ("visible", "off");
 %! unwind_protect
--- a/scripts/plot/appearance/camtarget.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/appearance/camtarget.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,12 +24,12 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {@var{T} =} camtarget ()
+## @deftypefn  {} {@var{t} =} camtarget ()
 ## @deftypefnx {} {} camtarget ([@var{x} @var{y} @var{z}])
 ## @deftypefnx {} {@var{mode} =} camtarget ("mode")
 ## @deftypefnx {} {} camtarget (@var{mode})
-## @deftypefnx {} {} camtarget (@var{ax}, @dots{})
-## Set or get where the camera is pointed.
+## @deftypefnx {} {} camtarget (@var{hax}, @dots{})
+## Get or set where the camera is pointed.
 ##
 ## The camera target is a point in space where the camera is pointing.
 ## Usually, it is determined automatically based on the scene:
@@ -89,13 +89,13 @@
 ## @end example
 ##
 ## By default, these commands affect the current axis; alternatively, an axis
-## can be specified by the optional argument @var{ax}.
+## can be specified by the optional argument @var{hax}.
 ##
 ## @seealso{campos, camup, camva}
 ## @end deftypefn
 
 
-function p = camtarget (varargin)
+function t = camtarget (varargin)
 
   [hax, varargin, nargin] = __plt_get_axis_arg__ ("camtarget", varargin{:});
 
@@ -111,13 +111,13 @@
 
   prop = "cameratarget";
   if (nargin == 0)
-    p = get (hax, prop);
+    t = get (hax, prop);
   elseif (nargin == 1 && isnumeric (varargin{1}) && numel (varargin{1}) == 3)
     set (hax, prop, varargin{1});
   elseif (nargin == 1 && ischar (varargin{1}))
     s = varargin{1};
     if (strcmp (s, "mode"))
-      p = get (hax, [prop "mode"]);
+      t = get (hax, [prop "mode"]);
     else
       set (hax, [prop "mode"], s);
     endif
@@ -172,7 +172,7 @@
 %!   delete (hf);
 %! end_unwind_protect
 
-## test ax input by creating another axis
+## test hax input by creating another axis
 %!test
 %! hf = figure ("visible", "off");
 %! unwind_protect
--- a/scripts/plot/appearance/camup.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/appearance/camup.m	Mon Aug 29 13:58:00 2022 +0200
@@ -28,8 +28,8 @@
 ## @deftypefnx {} {} camup ([@var{x} @var{y} @var{z}])
 ## @deftypefnx {} {@var{mode} =} camup ("mode")
 ## @deftypefnx {} {} camup (@var{mode})
-## @deftypefnx {} {} camup (@var{ax}, @dots{})
-## Set or get the camera up vector.
+## @deftypefnx {} {} camup (@var{hax}, @dots{})
+## Get or set the camera up vector.
 ##
 ## By default, the camera is oriented so that ``up'' corresponds to the
 ## positive z-axis:
@@ -85,13 +85,13 @@
 ## @end example
 ##
 ## By default, these commands affect the current axis; alternatively, an axis
-## can be specified by the optional argument @var{ax}.
+## can be specified by the optional argument @var{hax}.
 ##
 ## @seealso{campos, camtarget, camva}
 ## @end deftypefn
 
 
-function p = camup (varargin)
+function up = camup (varargin)
 
   [hax, varargin, nargin] = __plt_get_axis_arg__ ("camup", varargin{:});
 
@@ -107,13 +107,13 @@
 
   prop = "cameraupvector";
   if (nargin == 0)
-    p = get (hax, prop);
+    up = get (hax, prop);
   elseif (nargin == 1 && isnumeric (varargin{1}) && numel (varargin{1}) == 3)
     set (hax, prop, varargin{1});
   elseif (nargin == 1 && ischar (varargin{1}))
     s = varargin{1};
     if (strcmp (s, "mode"))
-      p = get (hax, [prop "mode"]);
+      up = get (hax, [prop "mode"]);
     else
       set (hax, [prop "mode"], s);
     endif
@@ -168,7 +168,7 @@
 %!   close (hf);
 %! end_unwind_protect
 
-## test ax input by creating another axis
+## test hax input by creating another axis
 %!test
 %! hf = figure ("visible", "off");
 %! unwind_protect
--- a/scripts/plot/appearance/camva.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/appearance/camva.m	Mon Aug 29 13:58:00 2022 +0200
@@ -28,8 +28,8 @@
 ## @deftypefnx {} {} camva (@var{a})
 ## @deftypefnx {} {@var{mode} =} camva ("mode")
 ## @deftypefnx {} {} camva (@var{mode})
-## @deftypefnx {} {} camva (@var{ax}, @dots{})
-## Set or get the camera viewing angle.
+## @deftypefnx {} {} camva (@var{hax}, @dots{})
+## Get or set the camera viewing angle.
 ##
 ## The camera has a viewing angle which determines how much can be seen.  By
 ## default this is:
@@ -68,13 +68,13 @@
 ## @end example
 ##
 ## By default, these commands affect the current axis; alternatively, an axis
-## can be specified by the optional argument @var{ax}.
+## can be specified by the optional argument @var{hax}.
 ##
 ## @seealso{campos, camtarget, camup}
 ## @end deftypefn
 
 
-function p = camva (varargin)
+function a = camva (varargin)
 
   [hax, varargin, nargin] = __plt_get_axis_arg__ ("camva", varargin{:});
 
@@ -90,13 +90,13 @@
 
   prop = "cameraviewangle";
   if (nargin == 0)
-    p = get (hax, prop);
+    a = get (hax, prop);
   elseif (nargin == 1 && isnumeric (varargin{1}) && isscalar (varargin{1}))
     set (hax, prop, varargin{1});
   elseif (nargin == 1 && ischar (varargin{1}))
     s = varargin{1};
     if (strcmp (s, "mode"))
-      p = get (hax, [prop "mode"]);
+      a = get (hax, [prop "mode"]);
     else
       set (hax, [prop "mode"], s);
     endif
@@ -151,7 +151,7 @@
 %!   close (hf);
 %! end_unwind_protect
 
-## test ax input by creating another axis
+## test hax input by creating another axis
 %!test
 %! hf = figure ("visible", "off");
 %! unwind_protect
--- a/scripts/plot/appearance/camzoom.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/appearance/camzoom.m	Mon Aug 29 13:58:00 2022 +0200
@@ -25,7 +25,7 @@
 
 ## -*- texinfo -*-
 ## @deftypefn  {} {} camzoom (@var{zf})
-## @deftypefnx {} {} camzoom (@var{ax}, @var{zf})
+## @deftypefnx {} {} camzoom (@var{hax}, @var{zf})
 ## Zoom the camera in or out.
 ##
 ## A value of @var{zf} larger than 1 ``zooms in'' such that the scene appears
@@ -59,7 +59,7 @@
 ## @end example
 ##
 ## By default, these commands affect the current axis; alternatively, an axis
-## can be specified by the optional argument @var{ax}.
+## can be specified by the optional argument @var{hax}.
 ##
 ## @seealso{camroll, camorbit, camlookat, camva}
 ## @end deftypefn
@@ -143,7 +143,7 @@
 %!   close (hf);
 %! end_unwind_protect
 
-## test ax input by creating another axis
+## test hax input by creating another axis
 %!test
 %! hf = figure ("visible", "off");
 %! unwind_protect
--- a/scripts/plot/appearance/clabel.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/appearance/clabel.m	Mon Aug 29 13:58:00 2022 +0200
@@ -29,7 +29,7 @@
 ## @deftypefnx {} {} clabel (@var{c}, @var{h}, "manual")
 ## @deftypefnx {} {} clabel (@var{c})
 ## @deftypefnx {} {} clabel (@dots{}, @var{prop}, @var{val}, @dots{})
-## @deftypefnx {} {@var{h} =} clabel (@dots{})
+## @deftypefnx {} {@var{hlabels} =} clabel (@dots{})
 ## Add labels to the contours of a contour plot.
 ##
 ## The contour levels are specified by the contour matrix @var{c} which is
@@ -51,7 +51,7 @@
 ## determines the spacing between labels on a contour to be specified.  The
 ## default is 144 points, or 2 inches.
 ##
-## The optional return value @var{h} is a vector of graphics handles to
+## The optional return value @var{hlabels} is a vector of graphics handles to
 ## the text objects representing each label.
 ## The @qcode{"userdata"} property of the text objects contains the numerical
 ## value of the contour label.
@@ -69,7 +69,7 @@
 ## @seealso{contour, contourf, contour3, meshc, surfc, text}
 ## @end deftypefn
 
-function h = clabel (c, varargin)
+function hlabels = clabel (c, varargin)
 
   have_hg = false;
   have_labelspacing = false;
@@ -138,7 +138,7 @@
   endif
 
   if (nargout > 0)
-    h = htmp;
+    hlabels = htmp;
   endif
 
 endfunction
--- a/scripts/plot/appearance/diffuse.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/appearance/diffuse.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} diffuse (@var{sx}, @var{sy}, @var{sz}, @var{lv})
+## @deftypefn {} {@var{d} =} diffuse (@var{sx}, @var{sy}, @var{sz}, @var{lv})
 ## Calculate the diffuse reflection strength of a surface defined by the normal
 ## vector elements @var{sx}, @var{sy}, @var{sz}.
 ##
@@ -33,7 +33,7 @@
 ## @seealso{specular, surfl}
 ## @end deftypefn
 
-function retval = diffuse (sx, sy, sz, lv)
+function d = diffuse (sx, sy, sz, lv)
 
   if (nargin != 4)
     print_usage ();
@@ -57,7 +57,7 @@
   endif
 
   ns = sqrt (sx.^2 + sy.^2 + sz.^2);
-  retval = (sx * lv(1) + sy * lv(2) + sz * lv(3)) ./ ns;
-  retval(retval < 0) = 0;
+  d = (sx * lv(1) + sy * lv(2) + sz * lv(3)) ./ ns;
+  d(d < 0) = 0;
 
 endfunction
--- a/scripts/plot/appearance/legend.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/appearance/legend.m	Mon Aug 29 13:58:00 2022 +0200
@@ -34,7 +34,7 @@
 ## @deftypefnx {} {} legend ("@var{command}")
 ## @deftypefnx {} {} legend (@var{hax}, @dots{})
 ## @deftypefnx {} {} legend (@var{hleg}, @dots{})
-## @deftypefnx {} {@var{hleg, hplt} =} legend (@dots{})
+## @deftypefnx {} {@var{hleg} =} legend (@dots{})
 ##
 ## Display a legend for the current axes using the specified strings as labels.
 ##
@@ -308,7 +308,7 @@
                       "deletefcn", {@reset_cb, hl});
 
     ## Listeners to foreign objects properties are stored for later
-    ## deletion in "delfunction"
+    ## deletion in "reset_cb"
     hax = opts.axes_handles(1);
     hf = ancestor (hax, "figure");
 
@@ -350,7 +350,7 @@
 
     addlistener (hl, "textcolor", ...
                  @(h, ~) set (findobj (h, "type", "text"), ...
-                               "color", get (hl, "textcolor")));
+                              "color", get (hl, "textcolor")));
 
     addlistener (hl, "visible", @update_visible_cb);
 
@@ -1076,14 +1076,22 @@
 
       ## Main line
       vals = get (hplt(1), lprops);
-      hicon = __go_line__ (hl, [lprops; vals]{:});
+      hicon = __go_line__ (hl, [lprops; vals]{:}, ...
+                           "pickableparts", "all", ...
+                           "buttondownfcn", ...
+                           {@execute_itemhit, hl, hplt, "icon"});
+
       addproperty ("markerxdata", hicon, "double", 0);
       addproperty ("markerydata", hicon, "double", 0);
 
       ## Additional line for the marker
       vals = get (hplt(end), mprops);
       hmarker = __go_line__ (hl, "handlevisibility", "off", ...
-                             "xdata", 0, "ydata", 0, [mprops; vals]{:});
+                             "xdata", 0, "ydata", 0, [mprops; vals]{:}, ...
+                             "pickableparts", "all", ...
+                             "buttondownfcn", ...
+                             {@execute_itemhit, hl, hplt, "icon"});
+      addproperty ("markertruesize", hmarker, "double", NaN);
       update_marker_cb (hmarker);
 
       ## Listeners
@@ -1095,7 +1103,8 @@
                    @(h, ~) set (hmarker, "xdata", get (h, "markerxdata")));
       addlistener (hicon, "visible", ...
                    @(h, ~) set (hmarker, "visible", get (h, "visible")));
-      addlistener (hmarker, "markersize", @update_marker_cb);
+      addlistener (hmarker, "markersize", {@update_marker_cb, true});
+      addlistener (hmarker, "marker", {@update_marker_cb, false});
       add_safe_listener (hl, hplt(1), "beingdeleted",
                          @(~, ~) delete ([hicon hmarker]))
       if (! strcmp (typ, "__errplot__"))
@@ -1127,7 +1136,10 @@
       vals {end-1} = mean (vals {end-1}, 1);
       vals {end} = mean (vals {end}, 1);
 
-      hicon = __go_scatter__ (hl, [all_sprops; vals]{:});
+      hicon = __go_scatter__ (hl, [all_sprops; vals]{:}, ...
+                              "pickableparts", "all", ...
+                              "buttondownfcn", ...
+                              {@execute_itemhit, hl, hplt, "icon"});
 
       ## Simple Listeners
       safe_property_link (hplt(1), hicon, sprops);
@@ -1151,7 +1163,10 @@
       ## Main patch
 
       vals = get (hplt(1), pprops);
-      hicon = __go_patch__ (hl, [pprops; vals]{:});
+      hicon = __go_patch__ (hl, [pprops; vals]{:}, ...
+                            "pickableparts", "all", ...
+                            "buttondownfcn", ...
+                            {@execute_itemhit, hl, hplt, "icon"});
 
       addproperty ("innerxdata", hicon, "any", 0);
       addproperty ("innerydata", hicon, "any", 0);
@@ -1159,7 +1174,10 @@
       ## Additional patch for the inner contour
       vals = get (hplt(end), pprops);
       htmp =  __go_patch__ (hl, "handlevisibility", "off", ...
-                            "xdata", 0, "ydata", 0, [pprops; vals]{:});
+                            "xdata", 0, "ydata", 0, [pprops; vals]{:}, ...
+                            "pickableparts", "all", ...
+                            "buttondownfcn", ...
+                            {@execute_itemhit, hl, hplt, "icon"});
 
       ## Listeners
       safe_property_link (hplt(1), hicon, pprops);
@@ -1177,13 +1195,30 @@
 
   endswitch
 
-  htxt = __go_text__ (hl, txtpval{:}, "string", str);
+  htxt = __go_text__ (hl, txtpval{:}, "string", str, ...
+                      "pickableparts", "all", ...
+                      "buttondownfcn", {@execute_itemhit, hl, hplt, "label"});
+
+  set (htxt, "buttondownfcn", {@execute_itemhit, hl, hplt, "label"});
 
   addproperty ("peer_object", htxt, "double", base_hplt);
   addproperty ("peer_object", hicon, "double", base_hplt);
 
 endfunction
 
+function execute_itemhit (h, ~, hl, hplt, region)
+
+  fcn = get (hl, "itemhitfcn");
+
+  if (! isempty (fcn))
+    evt = struct ("Peer", hplt, "Region", region, ...
+                  "SelectionType", get (gcbf (), "selectiontype"), ...
+                  "Source", hl, "EventName", "ItemHit");
+    fcn (hl, evt)
+  endif
+
+endfunction
+
 function safe_property_link (h1, h2, props)
 
   for ii = 1:numel (props)
@@ -1213,10 +1248,47 @@
 
 endfunction
 
-function update_marker_cb (h, ~)
+## Enforce maximum size of marker so it doesn't overflow legend key
+function update_marker_cb (h, ~, sz_updated = true)
+  persistent is_updating = false;
+
+  if (is_updating)
+    return;
+  endif
+
+  if (sz_updated)
+    ## Size was changed
+    sz = get (h, "markersize");
+    set (h, "markertruesize", sz);  # store true marker size
+
+    if (sz > 8)
+      is_updating = true;
 
-  if (get (h, "markersize") > 8)
-    set (h, "markersize", 8);
+      mark = get (h, "marker");
+      if (strcmp (mark, '.'))
+        set (h, "markersize", min ([sz, 24]));
+      else
+        set (h, "markersize", 8);
+      endif
+
+      is_updating = false;
+    endif
+
+  else
+    ## Marker style was changed
+    sz = get (h, "markertruesize");
+    if (sz > 8)
+      is_updating = true;
+
+      mark = get (h, "marker");
+      if (strcmp (mark, '.'))
+        set (h, "markersize", min ([sz, 24]));
+      else
+        set (h, "markersize", 8);
+      endif
+
+      is_updating = false;
+    endif
   endif
 
 endfunction
@@ -2040,6 +2112,18 @@
 %! legend ("Legend Text");
 %! title ({"Multi-line", "titles", "are *not* a", "problem"});
 
+%!demo  # bug 61814
+%! clf;
+%! data = [ [1:5]' , [5:-1:1]', 2.5*ones(5,1) ];
+%! hp = plot (data);
+%! set (hp(1), "marker", 'x', "markersize", 15);
+%! set (hp(2), "marker", 'o', "markersize", 30);
+%! set (hp(3), "marker", '.', "markersize", 30);
+%! legend ({"data1", "data2", "data3"}, "location", "north");
+%! set (hp(2), "marker", '.');
+%! set (hp(3), "marker", 'o');
+%! title ("Marker sizes do not overflow legend box");
+
 ## Test input validation
 %!test
 %! hf = figure ("visible", "off");
--- a/scripts/plot/appearance/orient.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/appearance/orient.m	Mon Aug 29 13:58:00 2022 +0200
@@ -51,7 +51,7 @@
 ## @seealso{print, saveas}
 ## @end deftypefn
 
-function retval = orient (varargin)
+function orientation = orient (varargin)
 
   cf = [];
   if (nargin > 0 && isscalar (varargin{1}) && isfigure (varargin{1}))
@@ -73,28 +73,28 @@
     set (cf, "paperunits", "inches");  # All Matlab calculations assume inches.
 
     if (nargin == 0)
-      retval = get (cf, "paperorientation");
-      if (strcmp (retval, "portrait"))
+      orientation = get (cf, "paperorientation");
+      if (strcmp (orientation, "portrait"))
         papersize = get (cf, "papersize");
         paperposition = get (cf, "paperposition");
         if (paperposition == [0.25 0.25 (papersize - 0.5)])
-          retval = "tall";
+          orientation = "tall";
         endif
       endif
     else
-      orientation = varargin{1};
-      if (strcmpi (orientation, "landscape")
-          || strcmpi (orientation, "portrait"))
-        if (! strcmpi (get (cf, "paperorientation"), orientation))
+      paporient = varargin{1};
+      if (strcmpi (paporient, "landscape")
+          || strcmpi (paporient, "portrait"))
+        if (! strcmpi (get (cf, "paperorientation"), paporient))
           ## FIXME: with the proper listeners in place there won't be a need to
           ##        set the papersize and paperposition here.
           papersize = get (cf, "papersize");
           paperposition = get (cf, "paperposition");
-          set (cf, "paperorientation", orientation,
+          set (cf, "paperorientation", paporient,
                    "papersize", papersize([2, 1]),
                    "paperposition", paperposition([2, 1, 4, 3]));
         endif
-        if (strcmpi (orientation, "portrait"))
+        if (strcmpi (paporient, "portrait"))
           ## portrait restores the default
           ## FIXME: Should use "default" here, but Octave complains
           ##        that "paperposition" is not a default property.
@@ -104,7 +104,7 @@
           papersize = get (cf, "papersize");
           set (cf, "paperposition", [0.25, 0.25, (papersize - 0.5)]);
         endif
-      elseif (strcmpi (orientation, "tall"))
+      elseif (strcmpi (paporient, "tall"))
         orient ("portrait");
         papersize = get (cf, "papersize");
         set (cf, "paperposition", [0.25, 0.25, (papersize - 0.5)]);
--- a/scripts/plot/appearance/rticks.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/appearance/rticks.m	Mon Aug 29 13:58:00 2022 +0200
@@ -48,17 +48,17 @@
 ## @seealso{thetaticks, xticks, yticks, zticks, polar, get, set}
 ## @end deftypefn
 
-function retval = rticks (varargin)
+function tickval = rticks (varargin)
 
   hax = [];
   switch (nargin)
     case 0
-      retval = get (gca (), "rtick");  # will error if no rtick exists.
+      tickval = get (gca (), "rtick");  # will error if no rtick exists.
       return;
 
     case 1
       if (isaxes (varargin{1}))
-        retval = get (varargin{1}, "rtick");
+        tickval = get (varargin{1}, "rtick");
         return;
       else
         arg = varargin{1};
@@ -95,7 +95,7 @@
     ## arg = tolower (arg);
     ## switch (arg)
     ##   case "mode"
-    ##     retval = get (hax, "rtickmode");
+    ##     tickval = get (hax, "rtickmode");
     ##
     ##   case {"auto", "manual"}
     ##     if (nargout > 0)
--- a/scripts/plot/appearance/specular.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/appearance/specular.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} specular (@var{sx}, @var{sy}, @var{sz}, @var{lv}, @var{vv})
-## @deftypefnx {} {} specular (@var{sx}, @var{sy}, @var{sz}, @var{lv}, @var{vv}, @var{se})
+## @deftypefn  {} {@var{refl} =} specular (@var{sx}, @var{sy}, @var{sz}, @var{lv}, @var{vv})
+## @deftypefnx {} {@var{refl} =} specular (@var{sx}, @var{sy}, @var{sz}, @var{lv}, @var{vv}, @var{se})
 ## Calculate the specular reflection strength of a surface defined by the
 ## normal vector elements @var{sx}, @var{sy}, @var{sz} using Phong's
 ## approximation.
@@ -40,7 +40,7 @@
 ## @seealso{diffuse, surfl}
 ## @end deftypefn
 
-function retval = specular (sx, sy, sz, lv, vv, se)
+function refl = specular (sx, sy, sz, lv, vv, se)
 
   if (nargin < 5)
     print_usage ();
@@ -86,13 +86,13 @@
   v_dot_n = (sx * vv(1) + sy * vv(2) + sz * vv(3)) ./ ns;
 
   ## Calculate specular reflection using Phong's approximation
-  retval = 2 * l_dot_n .* v_dot_n - dot (lv, vv);
+  refl = 2 * l_dot_n .* v_dot_n - dot (lv, vv);
 
   ## Set reflectance to zero if light is on the other side
-  retval(l_dot_n < 0) = 0;
+  refl(l_dot_n < 0) = 0;
 
   ## Allow positive values only
-  retval(retval < 0) = 0;
-  retval .^= se;
+  refl(refl < 0) = 0;
+  refl .^= se;
 
 endfunction
--- a/scripts/plot/appearance/thetaticks.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/appearance/thetaticks.m	Mon Aug 29 13:58:00 2022 +0200
@@ -48,7 +48,7 @@
 ## @seealso{rticks, xticks, yticks, zticks, polar, get, set}
 ## @end deftypefn
 
-function retval = thetaticks (varargin)
+function tickval = thetaticks (varargin)
 
   ## FIXME: Update function to work with polaraxes objects once that function
   ##        is implemented in Octave.  For compatibility with Matlab this may
@@ -57,12 +57,12 @@
   hax = [];
   switch (nargin)
     case 0
-      retval = get (gca , "ttick");  # will error if no ttick exists.
+      tickval = get (gca , "ttick");  # will error if no ttick exists.
       return;
 
     case 1
       if (isaxes (varargin{1}))
-        retval = get (varargin{1}, "ttick");
+        tickval = get (varargin{1}, "ttick");
         return;
       else
         arg = varargin{1};
@@ -99,7 +99,7 @@
     ##    arg = tolower (arg);
     ## switch (arg)
     ##   case "mode"
-    ##     retval = get (hax, "ttickmode");
+    ##     tickval = get (hax, "ttickmode");
     ##
     ##   case {"auto", "manual"}
     ##     if (nargout > 0)
--- a/scripts/plot/appearance/xlim.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/appearance/xlim.m	Mon Aug 29 13:58:00 2022 +0200
@@ -55,12 +55,12 @@
 ## @seealso{ylim, zlim, axis, set, get, gca}
 ## @end deftypefn
 
-function retval = xlim (varargin)
+function xlimits = xlim (varargin)
 
-  ret = __axis_limits__ ("xlim", varargin{:});
+  lims = __axis_limits__ ("xlim", varargin{:});
 
-  if (! isempty (ret))
-    retval = ret;
+  if (! isempty (lims))
+    xlimits = lims;
   endif
 
 endfunction
--- a/scripts/plot/appearance/xtickangle.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/appearance/xtickangle.m	Mon Aug 29 13:58:00 2022 +0200
@@ -45,22 +45,22 @@
 ## @seealso{ytickangle, ztickangle, get, set}
 ## @end deftypefn
 
-function retval = xtickangle (hax, angle)
+function angle = xtickangle (hax, angle)
 
   switch (nargin)
     case 0
-      retval = __tickangle__ (mfilename ());
+      angle = __tickangle__ (mfilename ());
 
     case 1
       if (nargout > 0)
-        retval = __tickangle__ (mfilename (), hax);
+        angle = __tickangle__ (mfilename (), hax);
       else
         __tickangle__ (mfilename (), hax);
       endif
 
     case 2
       if (nargout > 0)
-        retval = __tickangle__ (mfilename (), hax, angle);
+        angle = __tickangle__ (mfilename (), hax, angle);
       else
         __tickangle__ (mfilename (), hax, angle);
       endif
--- a/scripts/plot/appearance/xticklabels.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/appearance/xticklabels.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {@var{tickval} =} xticklabels
+## @deftypefn  {} {@var{labels} =} xticklabels
 ## @deftypefnx {} {@var{mode} =} xticklabels ("mode")
 ## @deftypefnx {} {} xticklabels (@var{tickval})
 ## @deftypefnx {} {} xticklabels ("auto")
@@ -56,17 +56,17 @@
 ## @seealso{xticks, yticklabels, zticklabels, get, set}
 ## @end deftypefn
 
-function retval = xticklabels (varargin)
+function labels = xticklabels (varargin)
 
   hax = [];
   switch (nargin)
     case 0
-      retval = get (gca , "xticklabel");  # will error if no xticklabel exists.
+      labels = get (gca , "xticklabel");  # will error if no xticklabel exists.
       return;
 
     case 1
       if (isaxes (varargin{1}))
-        retval = get (varargin{1}, "xticklabel");
+        labels = get (varargin{1}, "xticklabel");
         return;
       else
         arg = varargin{1};
@@ -117,7 +117,7 @@
     arg = tolower (arg);
     switch (arg)
       case "mode"
-        retval = get (hax, "xticklabelmode");
+        labels = get (hax, "xticklabelmode");
 
       case {"auto", "manual"}
         if (nargout > 0)
--- a/scripts/plot/appearance/xticks.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/appearance/xticks.m	Mon Aug 29 13:58:00 2022 +0200
@@ -53,17 +53,17 @@
 ## @seealso{xticklabels, yticks, zticks, rticks, thetaticks, get, set}
 ## @end deftypefn
 
-function retval = xticks (varargin)
+function tickval = xticks (varargin)
 
   hax = [];
   switch (nargin)
     case 0
-      retval = get (gca, "xtick");  # will error if no xtick exists.
+      tickval = get (gca, "xtick");  # will error if no xtick exists.
       return;
 
     case 1
       if (isaxes (varargin{1}))
-        retval = get (varargin{1}, "xtick");
+        tickval = get (varargin{1}, "xtick");
         return;
       else
         arg = varargin{1};
@@ -97,7 +97,7 @@
     arg = tolower (arg);
     switch (arg)
       case "mode"
-        retval = get (hax, "xtickmode");
+        tickval = get (hax, "xtickmode");
 
       case {"auto", "manual"}
         if (nargout > 0)
--- a/scripts/plot/appearance/ylim.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/appearance/ylim.m	Mon Aug 29 13:58:00 2022 +0200
@@ -55,12 +55,12 @@
 ## @seealso{xlim, zlim, axis, set, get, gca}
 ## @end deftypefn
 
-function retval = ylim (varargin)
+function ylimits = ylim (varargin)
 
-  ret = __axis_limits__ ("ylim", varargin{:});
+  lims = __axis_limits__ ("ylim", varargin{:});
 
-  if (! isempty (ret))
-    retval = ret;
+  if (! isempty (lims))
+    ylimits = lims;
   endif
 
 endfunction
--- a/scripts/plot/appearance/ytickangle.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/appearance/ytickangle.m	Mon Aug 29 13:58:00 2022 +0200
@@ -45,22 +45,22 @@
 ## @seealso{xtickangle, ztickangle, get, set}
 ## @end deftypefn
 
-function retval = ytickangle (hax, angle)
+function angle = ytickangle (hax, angle)
 
   switch (nargin)
     case 0
-      retval = __tickangle__ (mfilename ());
+      angle = __tickangle__ (mfilename ());
 
     case 1
       if (nargout > 0)
-        retval = __tickangle__ (mfilename (), hax);
+        angle = __tickangle__ (mfilename (), hax);
       else
         __tickangle__ (mfilename (), hax);
       endif
 
     case 2
       if (nargout > 0)
-        retval = __tickangle__ (mfilename (), hax, angle);
+        angle = __tickangle__ (mfilename (), hax, angle);
       else
         __tickangle__ (mfilename (), hax, angle);
       endif
--- a/scripts/plot/appearance/yticklabels.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/appearance/yticklabels.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {@var{tickval} =} yticklabels
+## @deftypefn  {} {@var{labels} =} yticklabels
 ## @deftypefnx {} {@var{mode} =} yticklabels ("mode")
 ## @deftypefnx {} {} yticklabels (@var{tickval})
 ## @deftypefnx {} {} yticklabels ("auto")
@@ -56,17 +56,17 @@
 ## @seealso{yticks, xticklabels, zticklabels, get, set}
 ## @end deftypefn
 
-function retval = yticklabels (varargin)
+function labels = yticklabels (varargin)
 
   hax = [];
   switch (nargin)
     case 0
-      retval = get (gca , "yticklabel"); # will error if no yticklabel exists.
+      labels = get (gca , "yticklabel"); # will error if no yticklabel exists.
       return;
 
     case 1
       if (isaxes (varargin{1}))
-        retval = get (varargin{1}, "yticklabel");
+        labels = get (varargin{1}, "yticklabel");
         return;
       else
         arg = varargin{1};
@@ -117,7 +117,7 @@
     arg = tolower (arg);
     switch (arg)
       case "mode"
-        retval = get (hax, "yticklabelmode");
+        labels = get (hax, "yticklabelmode");
 
       case {"auto", "manual"}
         if (nargout > 0)
--- a/scripts/plot/appearance/yticks.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/appearance/yticks.m	Mon Aug 29 13:58:00 2022 +0200
@@ -53,17 +53,17 @@
 ## @seealso{yticklabels, xticks, zticks, rticks, thetaticks, get, set}
 ## @end deftypefn
 
-function retval = yticks (varargin)
+function tickval = yticks (varargin)
 
   hax = [];
   switch (nargin)
     case 0
-      retval = get (gca , "ytick");  # will error if no ytick exists.
+      tickval = get (gca , "ytick");  # will error if no ytick exists.
       return;
 
     case 1
       if (isaxes (varargin{1}))
-        retval = get (varargin{1}, "ytick");
+        tickval = get (varargin{1}, "ytick");
         return;
       else
         arg = varargin{1};
@@ -99,7 +99,7 @@
     arg = tolower (arg);
     switch (arg)
       case "mode"
-        retval = get (hax, "ytickmode");
+        tickval = get (hax, "ytickmode");
 
       case {"auto", "manual"}
         if (nargout > 0)
--- a/scripts/plot/appearance/zlim.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/appearance/zlim.m	Mon Aug 29 13:58:00 2022 +0200
@@ -55,12 +55,12 @@
 ## @seealso{xlim, ylim, axis, set, get, gca}
 ## @end deftypefn
 
-function retval = zlim (varargin)
+function zlimits = zlim (varargin)
 
-  ret = __axis_limits__ ("zlim", varargin{:});
+  lims = __axis_limits__ ("zlim", varargin{:});
 
-  if (! isempty (ret))
-    retval = ret;
+  if (! isempty (lims))
+    zlimits = lims;
   endif
 
 endfunction
--- a/scripts/plot/appearance/ztickangle.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/appearance/ztickangle.m	Mon Aug 29 13:58:00 2022 +0200
@@ -45,22 +45,22 @@
 ## @seealso{xtickangle, ytickangle, get, set}
 ## @end deftypefn
 
-function retval = ztickangle (hax, angle)
+function angle = ztickangle (hax, angle)
 
   switch (nargin)
     case 0
-      retval = __tickangle__ (mfilename ());
+      angle = __tickangle__ (mfilename ());
 
     case 1
       if (nargout > 0)
-        retval = __tickangle__ (mfilename (), hax);
+        angle = __tickangle__ (mfilename (), hax);
       else
         __tickangle__ (mfilename (), hax);
       endif
 
     case 2
       if (nargout > 0)
-        retval = __tickangle__ (mfilename (), hax, angle);
+        angle = __tickangle__ (mfilename (), hax, angle);
       else
         __tickangle__ (mfilename (), hax, angle);
       endif
--- a/scripts/plot/appearance/zticklabels.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/appearance/zticklabels.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {@var{tickval} =} zticklabels
+## @deftypefn  {} {@var{labels} =} zticklabels
 ## @deftypefnx {} {@var{mode} =} zticklabels ("mode")
 ## @deftypefnx {} {} zticklabels (@var{tickval})
 ## @deftypefnx {} {} zticklabels ("auto")
@@ -56,17 +56,17 @@
 ## @seealso{zticks, xticklabels, zticklabels, get, set}
 ## @end deftypefn
 
-function retval = zticklabels (varargin)
+function labels = zticklabels (varargin)
 
   hax = [];
   switch (nargin)
     case 0
-      retval = get (gca , "zticklabel"); # will error if no zticklabel exists.
+      labels = get (gca , "zticklabel"); # will error if no zticklabel exists.
       return;
 
     case 1
       if (isaxes (varargin{1}))
-        retval = get (varargin{1}, "zticklabel");
+        labels = get (varargin{1}, "zticklabel");
         return;
       else
         arg = varargin{1};
@@ -117,7 +117,7 @@
     arg = tolower (arg);
     switch (arg)
       case "mode"
-        retval = get (hax, "zticklabelmode");
+        labels = get (hax, "zticklabelmode");
 
       case {"auto", "manual"}
         if (nargout > 0)
--- a/scripts/plot/appearance/zticks.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/appearance/zticks.m	Mon Aug 29 13:58:00 2022 +0200
@@ -53,17 +53,17 @@
 ## @seealso{zticklabels, xticks, yticks, rticks, thetaticks, get, set}
 ## @end deftypefn
 
-function retval = zticks (varargin)
+function tickval = zticks (varargin)
 
   hax = [];
   switch (nargin)
     case 0
-      retval = get (gca , "ztick");  # will error if no ztick exists.
+      tickval = get (gca , "ztick");  # will error if no ztick exists.
       return;
 
     case 1
       if (isaxes (varargin{1}))
-        retval = get (varargin{1}, "ztick");
+        tickval = get (varargin{1}, "ztick");
         return;
       else
         arg = varargin{1};
@@ -97,7 +97,7 @@
     arg = tolower (arg);
     switch (arg)
       case "mode"
-        retval = get (hax, "ztickmode");
+        tickval = get (hax, "ztickmode");
 
       case {"auto", "manual"}
         if (nargout > 0)
--- a/scripts/plot/draw/cylinder.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/draw/cylinder.m	Mon Aug 29 13:58:00 2022 +0200
@@ -57,7 +57,7 @@
 ## @seealso{ellipsoid, rectangle, sphere}
 ## @end deftypefn
 
-function [xx, yy, zz] = cylinder (varargin)
+function [x, y, z] = cylinder (varargin)
 
   [hax, args, nargs] = __plt_get_axis_arg__ ("cylinder", varargin{:});
 
@@ -74,21 +74,24 @@
     n = args{2};
   endif
 
-  if (length (r) < 2)
-    error ("cylinder: length (R) must be larger than 2");
+  if (! isvector (r))
+    error ("cylinder: R must be a scalar or vector");
+  endif
+  if (isscalar (r))
+    r .*= [1 1];  # expand single radius specification to required 2-term form
   endif
 
   phi = linspace (0, 2*pi, n+1);
   idx = 1:length (r);
   [phi, idx] = meshgrid (phi, idx);
-  z = (idx - 1) / (length (r) - 1);
+  zz = (idx - 1) / (length (r) - 1);
   r = r(idx);
-  [x, y] = pol2cart (phi, r);
+  [xx, yy] = pol2cart (phi, r);
 
   if (nargout > 0)
-    xx = x;
-    yy = y;
-    zz = z;
+    x = xx;
+    y = yy;
+    z = zz;
   else
     oldfig = [];
     if (! isempty (hax))
@@ -96,7 +99,7 @@
     endif
     unwind_protect
       hax = newplot (hax);
-      surf (x, y, z);
+      surf (xx, yy, zz);
     unwind_protect_cleanup
       if (! isempty (oldfig))
         set (0, "currentfigure", oldfig);
@@ -113,3 +116,8 @@
 %! [x, y, z] = cylinder (10:-1:0, 50);
 %! surf (x, y, z);
 %! title ("cylinder() with linearly shrinking radius produces a cone");
+
+## Test input validation
+%!error <Invalid call> cylinder (1,2,3)
+%!error <R must be a scalar> cylinder ([])
+%!error <R must be a scalar or vector> cylinder (ones (2,2))
--- a/scripts/plot/draw/ellipsoid.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/draw/ellipsoid.m	Mon Aug 29 13:58:00 2022 +0200
@@ -64,20 +64,24 @@
     n = 20;
   else
     n = varargin{7};
+    if (! (isreal (n) && isscalar (n) && n > 0))
+      error ("ellipsoid: N must be a real scalar > 0");
+    endif
+    n = floor (n);
   endif
 
   theta = linspace (0, 2 * pi, n + 1);
   phi = linspace (-pi / 2, pi / 2, n + 1);
   [theta, phi] = meshgrid (theta, phi);
 
-  x = xr .* cos (phi) .* cos (theta) + xc;
-  y = yr .* cos (phi) .* sin (theta) + yc;
-  z = zr .* sin (phi) + zc;
+  xx = xr .* cos (phi) .* cos (theta) + xc;
+  yy = yr .* cos (phi) .* sin (theta) + yc;
+  zz = zr .* sin (phi) + zc;
 
   if (nargout > 0)
-    xx = x;
-    yy = y;
-    zz = z;
+    x = xx;
+    y = yy;
+    z = zz;
   else
     oldfig = [];
     if (! isempty (hax))
@@ -86,7 +90,7 @@
     unwind_protect
       hax = newplot (hax);
 
-      surf (x, y, z);
+      surf (xx, yy, zz);
     unwind_protect_cleanup
       if (! isempty (oldfig))
         set (0, "currentfigure", oldfig);
@@ -101,3 +105,10 @@
 %! clf;
 %! ellipsoid (0, 0, 1, 2, 3, 4, 20);
 %! title ("ellipsoid()");
+
+## Test input validation
+%!error <Invalid call> ellipsoid (1,2,3,4,5)
+%!error <Invalid call> ellipsoid (1,2,3,4,5,6,7,8)
+%!error <N must be a real scalar> ellipsoid (1,2,3,4,5,6, 2i)
+%!error <N must be a real scalar> ellipsoid (1,2,3,4,5,6, ones (2,2))
+%!error <N must be a real scalar . 0> ellipsoid (1,2,3,4,5,6, -1)
--- a/scripts/plot/draw/fill.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/draw/fill.m	Mon Aug 29 13:58:00 2022 +0200
@@ -141,12 +141,9 @@
         ## For Matlab compatibility, return 1 patch object for each column
         for j = 1 : columns (x)
           if (one_color)
-            [htmp, err] = __patch__ (hax, x(:,j), y(:,j), cdata, opts{:});
+            htmp = __patch__ (hax, x(:,j), y(:,j), cdata, opts{:});
           else
-            [htmp, err] = __patch__ (hax, x(:,j), y(:,j), cdata(:,j), opts{:});
-          endif
-          if (err)
-            print_usage ();
+            htmp = __patch__ (hax, x(:,j), y(:,j), cdata(:,j), opts{:});
           endif
           hlist(end+1, 1) = htmp;
         endfor
--- a/scripts/plot/draw/fill3.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/draw/fill3.m	Mon Aug 29 13:58:00 2022 +0200
@@ -154,14 +154,9 @@
         ## For Matlab compatibility, return 1 patch object for each column
         for j = 1 : columns (x)
           if (one_color)
-            [htmp, err] = __patch__ (hax, x(:,j), y(:,j), z(:,j), ...
-                                     cdata, opts{:});
+            htmp = __patch__ (hax, x(:,j), y(:,j), z(:,j), cdata, opts{:});
           else
-            [htmp, err] = __patch__ (hax, x(:,j), y(:,j), z(:,j), ...
-                                     cdata(:,j), opts{:});
-          endif
-          if (err)
-            print_usage ();
+            htmp = __patch__ (hax, x(:,j), y(:,j), z(:,j), cdata(:,j), opts{:});
           endif
           hlist(end+1, 1) = htmp;
         endfor
--- a/scripts/plot/draw/fplot.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/draw/fplot.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,17 +24,17 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} fplot (@var{fn})
-## @deftypefnx {} {} fplot (@var{fn}, @var{limits})
+## @deftypefn  {} {} fplot (@var{fcn})
+## @deftypefnx {} {} fplot (@var{fcn}, @var{limits})
 ## @deftypefnx {} {} fplot (@dots{}, @var{tol})
 ## @deftypefnx {} {} fplot (@dots{}, @var{n})
 ## @deftypefnx {} {} fplot (@dots{}, @var{fmt})
 ## @deftypefnx {} {} fplot (@dots{}, @var{property}, @var{value}, @dots{})
 ## @deftypefnx {} {} fplot (@var{hax}, @dots{})
 ## @deftypefnx {} {[@var{x}, @var{y}] =} fplot (@dots{})
-## Plot a function @var{fn} within the range defined by @var{limits}.
+## Plot a function @var{fcn} within the range defined by @var{limits}.
 ##
-## @var{fn} is a function handle, inline function, or string containing the
+## @var{fcn} is a function handle, inline function, or string containing the
 ## name of the function to evaluate.
 ##
 ## The limits of the plot are of the form @w{@code{[@var{xlo}, @var{xhi}]}} or
@@ -99,19 +99,23 @@
     print_usage ();
   endif
 
-  fn = varargin{1};
-  if (isa (fn, "inline"))
-    fn = vectorize (inline (fn));
-    nam = formula (fn);
-  elseif (is_function_handle (fn))
-    nam = func2str (fn);
-  elseif (all (isalnum (fn)))
-    nam = fn;
-  elseif (ischar (fn))
-    fn = vectorize (inline (fn));
-    nam = formula (fn);
+  fcn = varargin{1};
+  if (isa (fcn, "inline"))
+    ## Don't warn about intentional use of inline functions (Bug #62682)
+    warning ("off", "Octave:legacy-function", "local");
+    fcn = vectorize (inline (fcn));
+    nam = formula (fcn);
+  elseif (is_function_handle (fcn))
+    nam = func2str (fcn);
+  elseif (all (isalnum (fcn)))
+    nam = fcn;
+  elseif (ischar (fcn))
+    ## Don't warn about intentional use of inline functions (Bug #62682)
+    warning ("off", "Octave:legacy-function", "local");
+    fcn = vectorize (inline (fcn));
+    nam = formula (fcn);
   else
-    error ("fplot: FN must be a function handle, inline function, or string");
+    error ("fplot: FCN must be a function handle, inline function, or string");
   endif
 
   if (nargin > 1 && isnumeric (varargin{2}))
@@ -163,21 +167,21 @@
   endif
 
   try
-    y0 = feval (fn, x0);
+    y0 = feval (fcn, x0);
     if (isscalar (y0))
-      warning ("fplot: FN is not a vectorized function which reduces performance");
-      fn = @(x) arrayfun (fn, x);  # Create a new fn that accepts vectors
-      y0 = feval (fn, x0);
+      warning ("fplot: FCN is not a vectorized function which reduces performance");
+      fcn = @(x) arrayfun (fcn, x);  # Create a new fcn that accepts vectors
+      y0 = feval (fcn, x0);
     endif
   catch
     ## feval failed, maybe it is because the function is not vectorized?
-    fn = @(x) arrayfun (fn, x);  # Create a new fn that accepts vectors
-    y0 = feval (fn, x0);
-    warning ("fplot: FN is not a vectorized function which reduces performance");
+    fcn = @(x) arrayfun (fcn, x);  # Create a new fcn that accepts vectors
+    y0 = feval (fcn, x0);
+    warning ("fplot: FCN is not a vectorized function which reduces performance");
   end_try_catch
 
   x = linspace (limits(1), limits(2), n)';
-  y = feval (fn, x);
+  y = feval (fcn, x);
 
   if (rows (x0) == rows (y0))
     fcn_transpose = false;
@@ -186,7 +190,7 @@
     y0 = y0.';
     y = y.';
   else
-    error ("fplot: invalid function FN (# of outputs not equal to inputs)");
+    error ("fplot: invalid function FCN (# of outputs not equal to inputs)");
   endif
 
   err0 = Inf;
@@ -213,7 +217,7 @@
     err0 = err;
     n = 2 * (n - 1) + 1;
     x = linspace (limits(1), limits(2), n)';
-    y = feval (fn, x);
+    y = feval (fcn, x);
     if (fcn_transpose)
       y = y.';
     endif
@@ -274,16 +278,16 @@
 
 %!test
 %! ## Function requiring transpose
-%! fn = @(x) 2 * x(:).';
-%! [x, y] = fplot (fn, [-1, 1]);
+%! fcn = @(x) 2 * x(:).';
+%! [x, y] = fplot (fcn, [-1, 1]);
 %! assert (columns (y) == 1);
 %! assert (rows (x) == rows (y));
 %! assert (y, 2*x);
 
 %!test
 %! ## Constant value function
-%! fn = @(x) 0;
-%! [x, y] = fplot (fn, [-1, 1]);
+%! fcn = @(x) 0;
+%! [x, y] = fplot (fcn, [-1, 1]);
 %! assert (columns (y) == 1);
 %! assert (rows (x) == rows (y));
 %! assert (y, repmat ([0], size (x)));
@@ -313,15 +317,15 @@
 ## Test input validation
 %!error <Invalid call> fplot ()
 %!error <Invalid call> fplot (1,2,3,4,5,6)
-%!error <FN must be a function handle> fplot (1, [0 1])
+%!error <FCN must be a function handle> fplot (1, [0 1])
 %!error <LIMITS must be a real vector> fplot (@cos, [i, 2*i])
 %!error <LIMITS must be a real vector with 2 or 4> fplot (@cos, [1])
 %!error <LIMITS must be a real vector with 2 or 4> fplot (@cos, [1 2 3])
 %!error <bad input in position 2> fplot (@cos, "linewidth")
 %!error <bad input in position 3> fplot (@cos, [-1,1], {1})
-%!warning <FN is not a vectorized function>
-%! fn = @(x) 0;
-%! [x,y] = fplot (fn, [-1,1]);
-%!error <invalid function FN>
-%! fn = @(x) [x;x];
-%! fplot (fn, [-1,1]);
+%!warning <FCN is not a vectorized function>
+%! fcn = @(x) 0;
+%! [x,y] = fplot (fcn, [-1,1]);
+%!error <invalid function FCN>
+%! fcn = @(x) [x;x];
+%! fplot (fcn, [-1,1]);
--- a/scripts/plot/draw/isocolors.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/draw/isocolors.m	Mon Aug 29 13:58:00 2022 +0200
@@ -28,8 +28,8 @@
 ## @deftypefnx {} {@var{cdat} =} isocolors (@var{x}, @var{y}, @var{z}, @var{c}, @var{v})
 ## @deftypefnx {} {@var{cdat} =} isocolors (@var{x}, @var{y}, @var{z}, @var{r}, @var{g}, @var{b}, @var{v})
 ## @deftypefnx {} {@var{cdat} =} isocolors (@var{r}, @var{g}, @var{b}, @var{v})
-## @deftypefnx {} {@var{cdat} =} isocolors (@dots{}, @var{p})
-## @deftypefnx {} {} isocolors (@dots{})
+## @deftypefnx {} {@var{cdat} =} isocolors (@dots{}, @var{hp})
+## @deftypefnx {} {} isocolors (@dots{}, @var{hp})
 ##
 ## Compute isosurface colors.
 ##
@@ -50,10 +50,10 @@
 ## @var{y}, @var{z} are not given then @code{meshgrid} computed values are
 ## used.
 ##
-## Optionally, a patch handle @var{p} can be given as the last input argument
+## Optionally, a patch handle @var{hp} can be given as the last input argument
 ## to all function call variations and the vertex data will be extracted
 ## from the isosurface patch object.  Finally, if no output argument is given
-## then the colors of the patch given by the patch handle @var{p} are changed.
+## then the colors of the patch given by the patch handle @var{hp} are changed.
 ##
 ## @seealso{isosurface, isonormals}
 ## @end deftypefn
@@ -97,11 +97,11 @@
   endswitch
 
   if (isnumeric (vp) && columns (vp) == 3)
-    pa = [];
+    hp = [];
     v = vp;
   elseif (isgraphics (vp, "patch"))
-    pa = vp;
-    v = get (pa, "Vertices");
+    hp = vp;
+    v = get (hp, "Vertices");
   else
     error ("isocolors: last argument must be a vertex list or patch handle");
   endif
@@ -116,8 +116,8 @@
   endif
 
   if (nargout == 0)
-    if (! isempty (pa))
-      set (pa, "FaceVertexCData", new_colors);
+    if (! isempty (hp))
+      set (hp, "FaceVertexCData", new_colors);
     endif
   else
     cdat = new_colors;
--- a/scripts/plot/draw/isonormals.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/draw/isonormals.m	Mon Aug 29 13:58:00 2022 +0200
@@ -97,11 +97,11 @@
   endswitch
 
   if (isnumeric (vp) && columns (vp) == 3)
-    pa = [];
+    hp = [];
     v = vp;
   elseif (isgraphics (vp, "patch"))
-    pa = vp;
-    v = get (pa, "Vertices");
+    hp = vp;
+    v = get (hp, "Vertices");
   else
     error ("isonormals: input must be a list of vertices or a patch handle");
   endif
@@ -113,8 +113,8 @@
   endif
 
   if (nargout == 0)
-    if (! isempty (pa))
-      set (pa, "VertexNormals", normals);
+    if (! isempty (hp))
+      set (hp, "VertexNormals", normals);
     endif
   else
     vn = normals;
--- a/scripts/plot/draw/patch.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/draw/patch.m	Mon Aug 29 13:58:00 2022 +0200
@@ -28,7 +28,7 @@
 ## @deftypefnx {} {} patch (@var{x}, @var{y}, @var{c})
 ## @deftypefnx {} {} patch (@var{x}, @var{y}, @var{z}, @var{c})
 ## @deftypefnx {} {} patch ("Faces", @var{faces}, "Vertices", @var{verts}, @dots{})
-## @deftypefnx {} {} patch (@dots{}, @var{prop}, @var{val}, @dots{})
+## @deftypefnx {} {} patch (@dots{}, "@var{prop}", @var{val}, @dots{})
 ## @deftypefnx {} {} patch (@dots{}, @var{propstruct}, @dots{})
 ## @deftypefnx {} {} patch (@var{hax}, @dots{})
 ## @deftypefnx {} {@var{h} =} patch (@dots{})
@@ -82,17 +82,11 @@
 
   [hax, varargin] = __plt_get_axis_arg__ ("patch", varargin{:});
 
-  if (isempty (hax))
-    hax = gca ();
-  else
+  if (! isempty (hax))
     hax = hax(1);
-  endif
+  endif 
 
-  [htmp, failed] = __patch__ (hax, varargin{:});
-
-  if (failed)
-    print_usage ();
-  endif
+  htmp = __patch__ (hax, varargin{:});
 
   if (nargout > 0)
     h = htmp;
@@ -308,3 +302,9 @@
 %! unwind_protect_cleanup
 %!   close (hf);
 %! end_unwind_protect
+
+## Test input validation
+%!error <invalid color specification C> patch (1, 1, 'x')
+%!error <invalid TrueColor data C> patch (1, 1, rand (1,2,3))
+%!error <size of X, Y, and C must be equal> patch (1, 1, [1, 2])
+%!error <invalid color specification C> patch (1, 1, {1})
--- a/scripts/plot/draw/plotyy.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/draw/plotyy.m	Mon Aug 29 13:58:00 2022 +0200
@@ -25,7 +25,7 @@
 
 ## -*- texinfo -*-
 ## @deftypefn  {} {} plotyy (@var{x1}, @var{y1}, @var{x2}, @var{y2})
-## @deftypefnx {} {} plotyy (@dots{}, @var{fun})
+## @deftypefnx {} {} plotyy (@dots{}, @var{fcn})
 ## @deftypefnx {} {} plotyy (@dots{}, @var{fun1}, @var{fun2})
 ## @deftypefnx {} {} plotyy (@var{hax}, @dots{})
 ## @deftypefnx {} {[@var{ax}, @var{h1}, @var{h2}] =} plotyy (@dots{})
@@ -36,8 +36,8 @@
 ##
 ## By default the arguments are evaluated with
 ## @code{feval (@@plot, @var{x}, @var{y})}.  However the type of plot can be
-## modified with the @var{fun} argument, in which case the plots are
-## generated by @code{feval (@var{fun}, @var{x}, @var{y})}.  @var{fun} can be
+## modified with the @var{fcn} argument, in which case the plots are
+## generated by @code{feval (@var{fcn}, @var{x}, @var{y})}.  @var{fcn} can be
 ## a function handle, an inline function, or a string of a function name.
 ##
 ## The function to use for each of the plots can be independently defined
--- a/scripts/plot/draw/private/__bar__.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/draw/private/__bar__.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,16 +24,16 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} __bar__ (@var{vertical}, @var{func}, @dots{})
+## @deftypefn {} {} __bar__ (@var{vertical}, @var{fcn}, @dots{})
 ## Undocumented internal function.
 ## @end deftypefn
 
-function varargout = __bar__ (func, vertical, varargin)
+function varargout = __bar__ (fcn, vertical, varargin)
 
-  [hax, varargin, nargin] = __plt_get_axis_arg__ (func, varargin{:});
+  [hax, varargin, nargin] = __plt_get_axis_arg__ (fcn, varargin{:});
 
   if (! isnumeric (varargin{1}))
-    error ("%s: Y must be numeric", func);
+    error ("%s: Y must be numeric", fcn);
   endif
 
   width = 0.8;
@@ -63,9 +63,9 @@
       idx = 2;
     else
       if (! isvector (x))
-        error ("%s: X must be a vector", func);
+        error ("%s: X must be a vector", fcn);
       elseif (numel (unique (x)) != numel (x))
-        error ("%s: X vector values must be unique", func);
+        error ("%s: X vector values must be unique", fcn);
       endif
       idx = 3;
     endif
@@ -99,7 +99,7 @@
     else
       if ((ischar (varargin{idx}) || iscellstr (varargin{idx}))
           && ! have_line_spec)
-        [linespec, valid] = __pltopt__ (func, varargin{idx}, false);
+        [linespec, valid] = __pltopt__ (fcn, varargin{idx}, false);
         if (valid)
           have_line_spec = true;
           ## FIXME: strange parse error requires semicolon to be spaced
@@ -133,7 +133,7 @@
     y = y.';
   endif
   if (ngrp != rows (y))
-    error ("%s: length of X and Y must be equal", func);
+    error ("%s: length of X and Y must be equal", fcn);
   endif
 
   nbars = columns (y);
--- a/scripts/plot/draw/private/__ezplot__.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/draw/private/__ezplot__.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {[@var{h}, @var{needusage}] =} __ezplot__ (@var{pltfunc}, @var{varargin})
+## @deftypefn {} {[@var{h}, @var{needusage}] =} __ezplot__ (@var{pltfcn}, @var{varargin})
 ## Undocumented internal function.
 ## @end deftypefn
 
@@ -34,11 +34,11 @@
 ##           called was called correctly.  The actual plotting occurs near
 ##           the end in an unwind_protect block.
 
-function [h, needusage] = __ezplot__ (pltfunc, varargin)
+function [h, needusage] = __ezplot__ (pltfcn, varargin)
 
-  ezfunc = ["ez" pltfunc];
+  ezfcn = ["ez" pltfcn];
 
-  [hax, varargin, nargin] = __plt_get_axis_arg__ (ezfunc, varargin{:});
+  [hax, varargin, nargin] = __plt_get_axis_arg__ (ezfcn, varargin{:});
 
   ## Define outputs early in case of shorting out of function with return;
   h = [];
@@ -48,14 +48,14 @@
     return;
   endif
 
-  iscontour = strncmp (pltfunc, "contour", 7);
+  iscontour = strncmp (pltfcn, "contour", 7);
 
   ## Defaults for ezplot
   isplot  = true;
   isplot3 = false;
   ispolar = false;
   nargs = 1;
-  switch (pltfunc)
+  switch (pltfcn)
     case "plot"
       ## defaults already set
 
@@ -75,24 +75,26 @@
   endswitch
 
   parametric = false;
-  fun = varargin{1};
-  if (ischar (fun))
-    if (exist (fun, "file") || exist (fun, "builtin"))
-      fun = str2func (fun);            # convert to function handle
+  fcn = varargin{1};
+  ## Don't warn about intentional use of inline functions (Bug #62682)
+  warning ("off", "Octave:legacy-function", "local");
+  if (ischar (fcn))
+    if (exist (fcn, "file") || exist (fcn, "builtin"))
+      fcn = str2func (fcn);            # convert to function handle
     else
-      fun = vectorize (inline (fun));  # convert to inline function
+      fcn = vectorize (inline (fcn));  # convert to inline function
     endif
   endif
 
-  if (isa (fun, "inline"))
-    argids = argnames (fun);
+  if (isa (fcn, "inline"))
+    argids = argnames (fcn);
     if (isplot && length (argids) == 2)
       nargs = 2;
     elseif (numel (argids) != nargs)
-      error ("%s: expecting a function of %d arguments", ezfunc, nargs);
+      error ("%s: expecting a function of %d arguments", ezfcn, nargs);
     endif
-    fun = vectorize (fun);
-    fstr = formula (fun);
+    fcn = vectorize (fcn);
+    fstr = formula (fcn);
     if (isplot)
       xarg = argids{1};
       if (nargs == 2)
@@ -110,8 +112,8 @@
       xarg = argids{1};
       yarg = argids{2};
     endif
-  elseif (is_function_handle (fun))
-    fstr = func2str (fun);
+  elseif (is_function_handle (fcn))
+    fstr = func2str (fcn);
     idx = index (fstr, ')');
     if (idx != 0)
       args = regexp (fstr(3:(idx-1)), '\w+', 'match');
@@ -119,7 +121,7 @@
     else
       args = {"x"};
       try
-        if (builtin ("nargin", fun) == 2)
+        if (builtin ("nargin", fcn) == 2)
           args{2} = "y";
         endif
       end_try_catch
@@ -127,7 +129,7 @@
     if (isplot && length (args) == 2)
       nargs = 2;
     elseif (numel (args) != nargs)
-      error ("%s: expecting a function of %d arguments", ezfunc, nargs);
+      error ("%s: expecting a function of %d arguments", ezfcn, nargs);
     endif
     if (isplot)
       xarg = args{1};
@@ -147,11 +149,11 @@
       yarg = args{2};
     endif
   else
-    error ("%s: F must be a string or function handle", ezfunc);
+    error ("%s: F must be a string or function handle", ezfcn);
   endif
 
   if (nargin > 2 || (nargin == 2 && isplot))
-    funx = fun;
+    funx = fcn;
     fstrx = fstr;
     funy = varargin{2};
     if (ischar (funy) && ! strcmp (funy, "circ") && ! strcmp (funy, "animate"))
@@ -162,13 +164,13 @@
         funy = vectorize (inline (funy));
       endif
       if (numel (argnames (funy)) != nargs)
-        error ("%s: expecting a function of %d arguments", ezfunc, nargs);
+        error ("%s: expecting a function of %d arguments", ezfcn, nargs);
       endif
       fstry = formula (funy);
     elseif (isa (funy, "inline"))
       parametric = true;
       if (numel (argnames (funy)) != nargs)
-        error ("%s: expecting a function of %d arguments", ezfunc, nargs);
+        error ("%s: expecting a function of %d arguments", ezfcn, nargs);
       endif
       funy = vectorize (funy);
       fstry = formula (funy);
@@ -183,7 +185,7 @@
         args = {"y"};
       endif
       if (numel (args) != nargs)
-        error ("%s: expecting a function of %d arguments", ezfunc, nargs);
+        error ("%s: expecting a function of %d arguments", ezfcn, nargs);
       endif
     endif
 
@@ -192,7 +194,7 @@
       return;
     elseif (parametric && isplot)
       if (nargs == 2)
-        error ("%s: can not define a parametric function in this manner", ezfunc);
+        error ("%s: can not define a parametric function in this manner", ezfcn);
       else
         xarg = "x";
         yarg = "y";
@@ -207,12 +209,12 @@
           funz = vectorize (inline (funz));
         endif
         if (numel (argnames (funz)) > nargs)
-          error ("%s: expecting a function of %d arguments", ezfunc, nargs);
+          error ("%s: expecting a function of %d arguments", ezfcn, nargs);
         endif
         fstrz = formula (funz);
       elseif (isa (funz, "inline"))
         if (numel (argnames (funz)) != nargs)
-          error ("%s: expecting a function of %d arguments", ezfunc, nargs);
+          error ("%s: expecting a function of %d arguments", ezfcn, nargs);
         endif
         funz = vectorize (funz);
         fstrz = formula (funz);
@@ -226,10 +228,10 @@
           args = {"z"};
         endif
         if (numel (args) != nargs)
-          error ("%s: expecting a function of %d arguments", ezfunc, nargs);
+          error ("%s: expecting a function of %d arguments", ezfcn, nargs);
         endif
       else
-        error ("%s: parametric plots require 3 functions", ezfunc);
+        error ("%s: parametric plots require 3 functions", ezfcn);
       endif
     endif
   endif
@@ -264,7 +266,7 @@
     elseif (numel (arg) == 4 && isempty (domain))
       domain = arg(:).';
     else
-      error ("%s: expecting scalar N, or 2-/4-element vector DOM", ezfunc);
+      error ("%s: expecting scalar N, or 2-/4-element vector DOM", ezfcn);
     endif
   endwhile
 
@@ -273,11 +275,11 @@
     return;
   elseif (circ && parametric)
     error ("%s: can not have both circular domain and parametric function",
-           ezfunc);
+           ezfcn);
   endif
 
   if (animate && ! isplot3)
-    error ("%s: animate option only valid for ezplot3", ezfunc);
+    error ("%s: animate option only valid for ezplot3", ezfcn);
   endif
 
   if (parametric)
@@ -366,7 +368,7 @@
       endif
     else  # non-parametric plots
       if (isplot && nargs == 2)
-        Z = feval (fun, X, Y);
+        Z = feval (fcn, X, Y);
 
         ## Matlab returns line objects for this case and so can't call
         ## contour directly as it returns patch objects to allow colormaps
@@ -385,18 +387,18 @@
         endwhile
       else
         if (ispolar)
-          Z = feval (fun, X);
+          Z = feval (fcn, X);
           ## FIXME: Why aren't singularities eliminated for polar plots?
         elseif (isplot)
-          Z = feval (fun, X);
+          Z = feval (fcn, X);
           ## Eliminate the singularities
           Z = __eliminate_sing__ (Z);
           domain = find_valid_domain (X, [], Z);
         elseif (iscontour)
-          Z = feval (fun, X, Y);
+          Z = feval (fcn, X, Y);
           Z = __eliminate_sing__ (Z);
         else  #  mesh, surf plots
-          Z = feval (fun, X, Y);
+          Z = feval (fcn, X, Y);
           Z = __eliminate_sing__ (Z);
           if (circ)
             ## Use domain calculated at the start.
@@ -426,7 +428,7 @@
   unwind_protect
     hax = newplot (hax);
     if (iscontour)
-      [~, h] = feval (pltfunc, hax, X, Y, Z);
+      [~, h] = feval (pltfcn, hax, X, Y, Z);
     elseif (isplot && nargs == 2)
       h = zeros (length (XX), 1);
       hold_state = get (hax, "nextplot");
@@ -442,7 +444,7 @@
       set (hax, "nextplot", hold_state);
       axis (hax, domain);
     elseif (isplot || ispolar)
-      h = feval (pltfunc, hax, X, Z);
+      h = feval (pltfcn, hax, X, Z);
       if (isplot)
         if (! parametric)
           axis (hax, domain);
@@ -454,12 +456,12 @@
       if (animate)
         comet3 (hax, X, Y, Z);
       else
-        h = feval (pltfunc, hax, X, Y, Z);
+        h = feval (pltfcn, hax, X, Y, Z);
       endif
       grid (hax, "on");
       zlabel (hax, "z");
     else  # mesh and surf plots
-      h = feval (pltfunc, hax, X, Y, Z);
+      h = feval (pltfcn, hax, X, Y, Z);
       ## FIXME: surf, mesh should really do a better job of setting zlim
       if (! parametric)
         axis (hax, domain);
--- a/scripts/plot/draw/private/__patch__.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/draw/private/__patch__.m	Mon Aug 29 13:58:00 2022 +0200
@@ -32,153 +32,154 @@
 ## Create patch object from x and y with color c and parent p.
 ## Return handle to patch object.
 
-function [h, failed] = __patch__ (p, varargin)
+function h = __patch__ (p, varargin)
 
   h = NaN;
-  failed = false;
+  nargin = nargin - 1;
 
   is_numeric_arg = cellfun (@isnumeric, varargin);
 
   if (isempty (varargin))
-    args = varargin;
+    args = {};
   elseif (is_numeric_arg(1))
     if (nargin < 3 || ! is_numeric_arg(2))
-      failed = true;
-    else
-      if (nargin > 4 && all (is_numeric_arg(1:4)))
-        x = varargin{1};
-        y = varargin{2};
+      print_usage ("patch");
+    endif
+
+    if (nargin >= 4 && all (is_numeric_arg(1:4)))
+      x = varargin{1};
+      y = varargin{2};
+      z = varargin{3};
+      c = varargin{4};
+      iarg = 5;
+    elseif (nargin >= 3 && all (is_numeric_arg(1:3)))
+      x = varargin{1};
+      y = varargin{2};
+      if (nargin > 3 && iscolorspec (varargin{4}))
         z = varargin{3};
         c = varargin{4};
         iarg = 5;
-      elseif (nargin > 3 && all (is_numeric_arg(1:3)))
-        x = varargin{1};
-        y = varargin{2};
-        if (nargin > 4 && iscolorspec (varargin{4}))
-          z = varargin{3};
-          c = varargin{4};
-          iarg = 5;
-        else
-          z = [];
-          c = varargin{3};
-          iarg = 4;
-        endif
-      elseif (nargin > 2 && all (is_numeric_arg(1:2)))
-        x = varargin{1};
-        y = varargin{2};
+      else
         z = [];
-        if (iscolorspec (varargin{3}))
-          c = varargin{3};
-          iarg = 4;
-        else
-          c = [];
-          iarg = 3;
-        endif
+        c = varargin{3};
+        iarg = 4;
       endif
+    elseif (nargin >= 3 && all (is_numeric_arg(1:2)))
+      x = varargin{1};
+      y = varargin{2};
+      z = [];
+      if (iscolorspec (varargin{3}))
+        c = varargin{3};
+        iarg = 4;
+      elseif (nargin == 3)
+        error ("patch: invalid color specification C");
+      else
+        c = [];
+        iarg = 3;
+      endif
+    endif
 
-      if (isvector (x))
-        x = x(:);
-        y = y(:);
-        z = z(:);
-        if (isnumeric (c))
-          if (isvector (c))
-            if (isequal (size (c), [1, 3]))
-              ## Do nothing, this is a single RGB color specification
-            elseif (numel (c) == numel (x))
-              c = c(:);
-            endif
-          elseif (rows (c) != numel (x) && columns (c) == numel (x))
-            c = c.';
+    if (isvector (x))
+      x = x(:);
+      y = y(:);
+      z = z(:);
+      if (isnumeric (c))
+        if (isvector (c))
+          if (isequal (size (c), [1, 3]))
+            ## Do nothing, this is a single RGB color specification
+          elseif (numel (c) == numel (x))
+            c = c(:);
           endif
+        elseif (rows (c) != numel (x) && columns (c) == numel (x))
+          c = c.';
         endif
       endif
-      args{1} = "xdata";
-      args{2} = x;
-      args{3} = "ydata";
-      args{4} = y;
-      args{5} = "zdata";
-      args{6} = z;
+    endif
+    args{1} = "xdata";
+    args{2} = x;
+    args{3} = "ydata";
+    args{4} = y;
+    args{5} = "zdata";
+    args{6} = z;
 
-      if (isnumeric (c))
+    if (isnumeric (c) && ! isempty (c))
 
-        if (ndims (c) == 3 && columns (c) == 1)
-          c = permute (c, [1, 3, 2]);
-        endif
+      if (ndims (c) == 3 && columns (c) == 1)
+        c = permute (c, [1, 3, 2]);
+      endif
 
-        if (isvector (c) && numel (c) == columns (x))
-          if (isnan (c))
-            args{7} = "facecolor";
-            args{8} = [1, 1, 1];
-            args{9} = "cdata";
-            args{10} = c;
-          elseif (isnumeric (c))
-            args{7} = "facecolor";
-            args{8} = "flat";
-            args{9} = "cdata";
-            args{10} = c;
-          else
-            error ("patch: color data C must be numeric");
-          endif
-        elseif (isrow (c) && numel (c) == 3)
+      if (isvector (c) && numel (c) == columns (x))
+        ## One color per face
+        if (isnan (c))
+          args{7} = "facecolor";
+          args{8} = [1, 1, 1];
+        else
           args{7} = "facecolor";
-          args{8} = c;
+          args{8} = "flat";
+        endif
+        args{9} = "cdata";
+        args{10} = c;
+      elseif (isrow (c) && numel (c) == 3)
+        ## One RGB color
+        args{7} = "facecolor";
+        args{8} = c;
+        args{9} = "cdata";
+        args{10} = [];
+      elseif (ndims (c) == 3 && size (c, 3) == 3)
+        ## CDATA is specified as 3-D RGB data
+        if ((rows (c) == 1 && columns (c) == 1) ...
+            || (rows (c) == 1 && columns (c) == columns (x)))
+          ## Single patch color or per-face color
+          args{7} = "facecolor";
+          args{8} = "flat";
+          args{9} = "cdata";
+          args{10} = c;
+        elseif (rows (c) == rows (x) && columns (c) == columns (x))
+          ## Per-vertex color
+          args{7} = "facecolor";
+          args{8} = "interp";
+          args{9} = "cdata";
+          args{10} = c;
+        else
+          error ("patch: invalid TrueColor data C");
+        endif
+      else
+        ## Color vectors
+        if (isempty (c))
+          args{7} = "facecolor";
+          args{8} = "interp";
           args{9} = "cdata";
           args{10} = [];
-        elseif (ndims (c) == 3 && size (c, 3) == 3)
-          ## CDATA is specified as RGB data
-          if ((rows (c) == 1 && columns (c) == 1) ...
-              || (rows (c) == 1 && columns (c) == columns (x)))
-            ## Single patch color or per-face color
-            args{7} = "facecolor";
-            args{8} = "flat";
-            args{9} = "cdata";
-            args{10} = c;
-          elseif (rows (c) == rows (x) && columns (c) == columns (x))
-            ## Per-vertex color
-            args{7} = "facecolor";
-            args{8} = "interp";
-            args{9} = "cdata";
-            args{10} = c;
-          else
-            error ("patch: Invalid TrueColor data C");
-          endif
+        elseif (size_equal (c, x) && size_equal (c, y))
+          args{7} = "facecolor";
+          args{8} = "interp";
+          args{9} = "cdata";
+          args{10} = c;
         else
-          ## Color Vectors
-          if (isempty (c))
-            args{7} = "facecolor";
-            args{8} = "interp";
-            args{9} = "cdata";
-            args{10} = [];
-          elseif (size_equal (c, x) && size_equal (c, y))
-            args{7} = "facecolor";
-            args{8} = "interp";
-            args{9} = "cdata";
-            args{10} = c;
-          else
-            error ("patch: size of X, Y, and C must be equal");
-          endif
+          error ("patch: size of X, Y, and C must be equal");
         endif
-      elseif (iscolorspec (c))
-        args{7} = "facecolor";
-        args{8} = tolower (c);
-        args{9} = "cdata";
-        args{10} = [];
-      else
-        args{7} = "facecolor";
-        args{8} = [0, 0, 0];
-        args{9} = "cdata";
-        args{10} = [];
       endif
+    elseif (iscolorspec (c))
+      ## Color specification is a string
+      args{7} = "facecolor";
+      args{8} = tolower (c);
+      args{9} = "cdata";
+      args{10} = [];
+    elseif (! isempty (c))
+      error ("patch: invalid color specification C");
+    endif
 
-      args = [args, varargin(iarg:end)];
-    endif
+    args = [args, varargin(iarg:end)];
+
   else
+    ## "Property"/Value pair input
     args = varargin;
   endif
 
-  if (! failed)
-    h = __go_patch__ (p, args{:});
+  if (isempty (p))
+    p = gca ();
   endif
+  h = __go_patch__ (p, args{:});
 
 endfunction
 
--- a/scripts/plot/draw/sphere.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/draw/sphere.m	Mon Aug 29 13:58:00 2022 +0200
@@ -53,7 +53,7 @@
 ## @seealso{cylinder, ellipsoid, rectangle}
 ## @end deftypefn
 
-function [xx, yy, zz] = sphere (varargin)
+function [x, y, z] = sphere (varargin)
 
   [hax, varargin, nargin] = __plt_get_axis_arg__ ("sphere", varargin{:});
 
@@ -61,22 +61,25 @@
     print_usage ();
   elseif (nargin == 1)
     n = varargin{1};
+    if (! (isreal (n) && isscalar (n) && n > 0))
+      error ("sphere: N must be a real scalar > 0");
+    endif
   else
     n = 20;
   endif
 
   theta = linspace (0, 2*pi, n+1);
   phi = linspace (-pi/2, pi/2, n+1);
-  [theta,phi] = meshgrid (theta, phi);
+  [theta, phi] = meshgrid (theta, phi);
 
-  x = cos (phi) .* cos (theta);
-  y = cos (phi) .* sin (theta);
-  z = sin (phi);
+  xx = cos (phi) .* cos (theta);
+  yy = cos (phi) .* sin (theta);
+  zz = sin (phi);
 
   if (nargout > 0)
-    xx = x;
-    yy = y;
-    zz = z;
+    x = xx;
+    y = yy;
+    z = zz;
   else
     oldfig = [];
     if (! isempty (hax))
@@ -85,7 +88,7 @@
     unwind_protect
       hax = newplot (hax);
 
-      surf (x, y, z);
+      surf (xx, yy, zz);
     unwind_protect_cleanup
       if (! isempty (oldfig))
         set (0, "currentfigure", oldfig);
@@ -94,3 +97,19 @@
   endif
 
 endfunction
+
+
+%!demo
+%! clf;
+%! colormap ("default");
+%! [x, y, z] = sphere (40);
+%! surf (3*x, 3*y, 3*z);
+%! axis equal;
+%! title ("sphere of radius 3");
+
+## Test input validation
+%!error <Invalid call> sphere (-1,1)
+%!error <N must be a real scalar> sphere (2i)
+%!error <N must be a real scalar> sphere ([])
+%!error <N must be a real scalar> sphere (ones (2,2))
+%!error <N must be a real scalar . 0> sphere (-1)
--- a/scripts/plot/draw/stairs.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/draw/stairs.m	Mon Aug 29 13:58:00 2022 +0200
@@ -71,7 +71,7 @@
 ## @seealso{bar, hist, plot, stem}
 ## @end deftypefn
 
-function [xs, ys] = stairs (varargin)
+function [xstep, ystep] = stairs (varargin)
 
   [hax, varargin, nargin] = __plt_get_axis_arg__ ("stairs", varargin{:});
 
@@ -86,7 +86,7 @@
     endif
     unwind_protect
       hax = newplot (hax);
-      [htmp, xxs, yys] = __stairs__ (true, varargin{:});
+      htmp = __stairs__ (true, varargin{:});
 
       if (! ishold ())
         set (hax, "box", "on");
@@ -98,10 +98,10 @@
       endif
     end_unwind_protect
     if (nargout == 1)
-      xs = htmp;
+      xstep = htmp;
     endif
   else
-    [~, xs, ys] = __stairs__ (false, varargin{:});
+    [~, xstep, ystep] = __stairs__ (false, varargin{:});
   endif
 
 endfunction
--- a/scripts/plot/draw/surfnorm.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/draw/surfnorm.m	Mon Aug 29 13:58:00 2022 +0200
@@ -28,7 +28,7 @@
 ## @deftypefnx {} {} surfnorm (@var{z})
 ## @deftypefnx {} {} surfnorm (@dots{}, @var{prop}, @var{val}, @dots{})
 ## @deftypefnx {} {} surfnorm (@var{hax}, @dots{})
-## @deftypefnx {} {[@var{nx}, @var{ny}, @var{nz}] =} surfnorm (@dots{})
+## @deftypefnx {} {[@var{Nx}, @var{Ny}, @var{Nz}] =} surfnorm (@dots{})
 ## Find the vectors normal to a meshgridded surface.
 ##
 ## If @var{x} and @var{y} are vectors, then a typical vertex is
@@ -48,7 +48,7 @@
 ## rather than the current axes returned by @code{gca}.
 ##
 ## If output arguments are requested then the components of the normal
-## vectors are returned in @var{nx}, @var{ny}, and @var{nz} and no plot is
+## vectors are returned in @var{Nx}, @var{Ny}, and @var{Nz} and no plot is
 ## made.  The normal vectors are unnormalized (magnitude != 1).  To normalize,
 ## use
 ##
--- a/scripts/plot/util/__actual_axis_position__.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/util/__actual_axis_position__.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} __actual_axis_position__ (@var{h})
-## @deftypefnx {} {} __actual_axis_position__ (@var{axis_struct})
+## @deftypefn  {} {@var{pos} =} __actual_axis_position__ (@var{h})
+## @deftypefnx {} {@var{pos} =} __actual_axis_position__ (@var{axis_struct})
 ## Undocumented internal function.
 ## @end deftypefn
 
--- a/scripts/plot/util/__pltopt__.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/util/__pltopt__.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} __pltopt__ (@var{caller}, @var{opt}, @var{err_on_invalid})
+## @deftypefn {} {[@var{options}, @var{valid}] =} __pltopt__ (@var{caller}, @var{opt}, @var{err_on_invalid})
 ##
 ## Decode plot option strings.
 ##
--- a/scripts/plot/util/close.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/util/close.m	Mon Aug 29 13:58:00 2022 +0200
@@ -30,6 +30,7 @@
 ## @deftypefnx {} {} close all
 ## @deftypefnx {} {} close all hidden
 ## @deftypefnx {} {} close all force
+## @deftypefnx {} {@var{status} =} close (@dots{})
 ## Close figure window(s).
 ##
 ## When called with no arguments, close the current figure.  This is equivalent
@@ -48,6 +49,9 @@
 ## even when @qcode{"closerequestfcn"} has been altered to prevent closing the
 ## window.
 ##
+## If the optional output @var{status} is requested then Octave returns 1 if
+## the figure windows were closed successfully.
+##
 ## Implementation Note: @code{close} operates by making the handle @var{h} the
 ## current figure, and then calling the function specified by the
 ## @qcode{"closerequestfcn"} property of the figure.  By default, the function
@@ -59,7 +63,7 @@
 ## @seealso{closereq, delete}
 ## @end deftypefn
 
-function retval = close (arg1, arg2)
+function status = close (arg1, arg2)
 
   figs = [];
 
@@ -122,7 +126,7 @@
   endif
 
   if (nargout > 0)
-    retval = 1;
+    status = 1;
   endif
 
 endfunction
--- a/scripts/plot/util/findobj.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/util/findobj.m	Mon Aug 29 13:58:00 2022 +0200
@@ -219,7 +219,7 @@
 
   numpairs = np - 1;
   if (! isempty (logicaloperator))
-    logicaloperator = shift (logicaloperator, 1);
+    logicaloperator = circshift (logicaloperator, 1);
   endif
 
   ## Load all objects which qualify for being searched.
@@ -238,7 +238,7 @@
   if (numpairs > 0)
     match = true (numel (h), numpairs);
     for nh = 1 : numel (h)
-      p = get (h(nh));
+      p = __get__ (h(nh));
       for np = 1 : numpairs
         fields = fieldnames (p);
         fieldindex = find (strcmpi (fields, pname{np}), 1);
--- a/scripts/plot/util/graphics_toolkit.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/util/graphics_toolkit.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {@var{name} =} graphics_toolkit ()
-## @deftypefnx {} {@var{name} =} graphics_toolkit (@var{hlist})
+## @deftypefn  {} {@var{tkit} =} graphics_toolkit ()
+## @deftypefnx {} {@var{tkit} =} graphics_toolkit (@var{hlist})
 ## @deftypefnx {} {} graphics_toolkit (@var{name})
 ## @deftypefnx {} {} graphics_toolkit (@var{hlist}, @var{name})
 ## Query or set the default graphics toolkit which is assigned to new figures.
@@ -43,19 +43,19 @@
 ## @seealso{available_graphics_toolkits}
 ## @end deftypefn
 
-function retval = graphics_toolkit (name, hlist = [])
+function tkit = graphics_toolkit (name, hlist = [])
 
   if (nargout > 0 || nargin == 0)
-    retval = get (0, "defaultfigure__graphics_toolkit__");
+    tkit = get (0, "defaultfigure__graphics_toolkit__");
     ## Handle case where graphics_toolkit has been called before any plotting
-    if (isempty (retval))
+    if (isempty (tkit))
       toolkits = available_graphics_toolkits ();
       if (any (strcmp ("qt", toolkits)))
-        retval = "qt";
+        tkit = "qt";
       elseif (any (strcmp ("fltk", toolkits)))
-        retval = "fltk";
+        tkit = "fltk";
       elseif (! isempty (toolkits))
-        retval = toolkits{1};
+        tkit = toolkits{1};
       endif
     endif
   endif
@@ -65,7 +65,7 @@
   elseif (nargin == 1)
     if (all (isfigure (name)))
       hlist = name;
-      retval = get (hlist, "__graphics_toolkit__");
+      tkit = get (hlist, "__graphics_toolkit__");
       return;
     elseif (! ischar (name))
       error ("graphics_toolkit: invalid graphics toolkit NAME");
--- a/scripts/plot/util/isaxes.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/util/isaxes.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} isaxes (@var{h})
+## @deftypefn {} {@var{tf} =} isaxes (@var{h})
 ## Return true if @var{h} is an axes graphics handle and false otherwise.
 ##
 ## If @var{h} is a matrix then return a logical array which is true where the
@@ -32,16 +32,16 @@
 ## @seealso{isfigure, ishghandle, isgraphics}
 ## @end deftypefn
 
-function retval = isaxes (h)
+function tf = isaxes (h)
 
   if (nargin < 1)
     print_usage ();
   endif
 
-  retval = ishghandle (h);
+  tf = ishghandle (h);
 
-  if (any (retval))
-    retval(retval) = strcmp (get (h(retval), "type"), "axes");
+  if (any (tf))
+    tf(tf) = strcmp (get (h(tf), "type"), "axes");
   endif
 
 endfunction
--- a/scripts/plot/util/isfigure.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/util/isfigure.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} isfigure (@var{h})
+## @deftypefn {} {@var{tf} =} isfigure (@var{h})
 ## Return true if @var{h} is a figure graphics handle and false otherwise.
 ##
 ## If @var{h} is a matrix then return a logical array which is true where the
@@ -33,16 +33,16 @@
 ## @seealso{isaxes, ishghandle, isgraphics}
 ## @end deftypefn
 
-function retval = isfigure (h)
+function tf = isfigure (h)
 
   if (nargin < 1)
     print_usage ();
   endif
 
-  retval = ishghandle (h);
+  tf = ishghandle (h);
 
-  if (any (retval))
-    retval(retval) = strcmp (get (h(retval), "type"), "figure");
+  if (any (tf))
+    tf(tf) = strcmp (get (h(tf), "type"), "figure");
   endif
 
 endfunction
--- a/scripts/plot/util/isgraphics.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/util/isgraphics.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} isgraphics (@var{h})
-## @deftypefnx {} {} isgraphics (@var{h}, @var{type})
+## @deftypefn  {} {@var{tf} =} isgraphics (@var{h})
+## @deftypefnx {} {@var{tf} =} isgraphics (@var{h}, @var{type})
 ## Return true if @var{h} is a graphics handle (of type @var{type}) and false
 ## otherwise.
 ##
@@ -34,7 +34,7 @@
 ## @seealso{ishghandle, ishandle, isaxes, isfigure}
 ## @end deftypefn
 
-function retval = isgraphics (h, type = "")
+function tf = isgraphics (h, type = "")
 
   if (nargin < 1)
     print_usage ();
@@ -45,10 +45,10 @@
   endif
 
   ## Octave has no Simulink equivalent so it is sufficient to call ishghandle.
-  retval = ishghandle (h);
+  tf = ishghandle (h);
 
-  if (nargin == 2 && any (retval))
-    retval(retval) = strcmpi (get (h(retval), "type"), type);
+  if (nargin == 2 && any (tf))
+    tf(tf) = strcmpi (get (h(tf), "type"), type);
   endif
 
 endfunction
--- a/scripts/plot/util/ishandle.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/util/ishandle.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} ishandle (@var{h})
+## @deftypefn {} {@var{tf} =} ishandle (@var{h})
 ## Return true if @var{h} is a handle to a graphics or Java object and false
 ## otherwise.
 ##
@@ -39,13 +39,13 @@
 ## @seealso{ishghandle, isgraphics, isjava}
 ## @end deftypefn
 
-function retval = ishandle (h)
+function tf = ishandle (h)
 
   if (nargin < 1)
     print_usage ();
   endif
 
-  retval = ishghandle (h) | isjava (h);
+  tf = ishghandle (h) | isjava (h);
 
 endfunction
 
--- a/scripts/plot/util/ishold.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/util/ishold.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,9 +24,9 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} ishold
-## @deftypefnx {} {} ishold (@var{hax})
-## @deftypefnx {} {} ishold (@var{hfig})
+## @deftypefn  {} {@var{tf} =} ishold
+## @deftypefnx {} {@var{tf} =} ishold (@var{hax})
+## @deftypefnx {} {@var{tf} =} ishold (@var{hfig})
 ## Return true if the next plot will be added to the current plot, or
 ## false if the plot device will be cleared before drawing the next plot.
 ##
@@ -35,7 +35,7 @@
 ## @seealso{hold, newplot}
 ## @end deftypefn
 
-function retval = ishold (h)
+function tf = ishold (h)
 
   if (nargin == 0)
     fig = gcf ();
@@ -60,7 +60,7 @@
     endswitch
   endif
 
-  retval = (strcmp (get (fig, "nextplot"), "add")
+  tf = (strcmp (get (fig, "nextplot"), "add")
             && ! isempty (ax) && strcmp (get (ax, "nextplot"), "add"));
 
 endfunction
--- a/scripts/plot/util/pan.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/util/pan.m	Mon Aug 29 13:58:00 2022 +0200
@@ -46,7 +46,7 @@
 ## @seealso{rotate3d, zoom}
 ## @end deftypefn
 
-function h = pan (hfig, option)
+function pan (hfig, option)
 
   ## FIXME: Presumably should implement this for Matlab compatibility.
   if (nargin == 1 && nargout > 0 && isfigure (hfig))
--- a/scripts/plot/util/print.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/util/print.m	Mon Aug 29 13:58:00 2022 +0200
@@ -28,7 +28,7 @@
 ## @deftypefnx {} {} print (@var{options})
 ## @deftypefnx {} {} print (@var{filename}, @var{options})
 ## @deftypefnx {} {} print (@var{hfig}, @dots{})
-## @deftypefnx {} {@var{rgb} =} print (@qcode{"-RGBImage"}, @dots{})
+## @deftypefnx {} {@var{RGB} =} print (@qcode{"-RGBImage"}, @dots{})
 ## Format a figure for printing and either save it to a file, send it to a
 ## printer, or return an RGB image.
 ##
@@ -116,15 +116,15 @@
 ## @end group
 ## @end example
 ##
-## @item  -opengl
-## @itemx -painters
-##   Specifies whether the opengl (pixel-based) or painters (vector-based)
-## renderer is used.  This is equivalent to changing the figure's
-## @qcode{"Renderer"} property.  When the figure
-## @nospell{@qcode{"RendererMode"}} property is @qcode{"auto"} (the default)
-## Octave will use the @qcode{"opengl"} renderer for raster formats (e.g.,
-## JPEG) and @qcode{"painters"} for vector formats (e.g., PDF).  Those options
-## are only supported for the "qt" graphics toolkit.
+## @item  -image | -opengl
+## @itemx -vector | -painters
+##   Specifies whether the pixel-based renderer (@env{-image} or @env{-opengl})
+## or vector-based renderer (@env{-vector} or @env{-painters}) is used.  This
+## is equivalent to changing the figure's @qcode{"Renderer"} property.  When
+## the figure @nospell{@qcode{"RendererMode"}} property is @qcode{"auto"} (the
+## default) Octave will use the @qcode{"opengl"} renderer for raster formats
+## (e.g., JPEG) and @qcode{"painters"} for vector formats (e.g., PDF)@.  These
+## options are only supported for the "qt" graphics toolkit.
 ##
 ## @item -svgconvert
 ##   When using the @option{-painters} renderer, this enables a different
@@ -415,7 +415,7 @@
 ## @seealso{saveas, getframe, savefig, hgsave, orient, figure}
 ## @end deftypefn
 
-function rgbout = print (varargin)
+function RGB = print (varargin)
 
   opts = __print_parse_opts__ (varargin{:});
 
@@ -754,7 +754,7 @@
       otherwise
         if (strcmp (opts.renderer, "opengl"))
           if (opts.rgb_output)
-            rgbout = __get_frame__ (opts.figure);
+            RGB = __get_frame__ (opts.figure);
           else
             compression = "none";
 
--- a/scripts/plot/util/printd.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/util/printd.m	Mon Aug 29 13:58:00 2022 +0200
@@ -30,7 +30,7 @@
 ## Convert any object acceptable to @code{disp} into the format selected by
 ## the suffix of @var{filename}.
 ##
-## If the return argument @var{out_file} is given, the name of the created
+## If the optional output @var{out_file} is requested, the name of the created
 ## file is returned.
 ##
 ## This function is intended to facilitate manipulation of the output of
--- a/scripts/plot/util/private/__add_default_menu__.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/util/private/__add_default_menu__.m	Mon Aug 29 13:58:00 2022 +0200
@@ -49,104 +49,108 @@
     ## File menu
     hui = uimenu (hf, "label", "&File", "tag", "__default_menu__File", ...
                       "handlevisibility", "off");
-    uimenu (hui, "label", "&Open...", "callback", @open_cb, ...
-            "accelerator", "o");
-    uimenu (hui, "label", "&Save", "callback", {@save_cb, "save"}, ...
-            "accelerator", "s");
-    uimenu (hui, "label", "Save &As...", "callback", {@save_cb, "saveas"}, ...
-            "accelerator", "S");
-    uimenu (hui, "label", "&Close", "callback", @close_cb, ...
-            "accelerator", "w", "separator", "on");
+    uimenu (hui, "label", "&Open...", "menuselectedfcn", @open_cb, ...
+                 "accelerator", "o");
+    uimenu (hui, "label", "&Save", "menuselectedfcn", {@save_cb, "save"}, ...
+                 "accelerator", "s");
+    uimenu (hui, "label", "Save &As...", ...
+                 "menuselectedfcn", {@save_cb, "saveas"}, ...
+                 "accelerator", "S");
+    uimenu (hui, "label", "&Close", "menuselectedfcn", @close_cb, ...
+                 "accelerator", "w", "separator", "on");
     hmenu(1) = hui;
 
     ## Edit menu
     hui = uimenu (hf, "label", "&Edit", "handlevisibility", "off", ...
-                  "tag", "__default_menu__Edit");
-    uimenu (hui, "label", "&New Figure", "callback", "figure ();", ...
-            "accelerator", "n");
+                      "tag", "__default_menu__Edit");
+    uimenu (hui, "label", "&New Figure", "menuselectedfcn", "figure ();", ...
+                 "accelerator", "n");
     uimenu (hui, "label", "&Duplicate Figure",
-            "callback", "copyobj (gcbf (), groot ());", ...
-            "accelerator", "d");
+                 "menuselectedfcn", "copyobj (gcbf (), groot ());", ...
+                 "accelerator", "d");
     uimenu (hui, "label", "Clea&r Figure",
-            "callback", "clf (gcbf ());");
+                 "menuselectedfcn", "clf (gcbf ());");
     uimenu (hui, "label", "Reset Figure",
-            "callback", "reset (gcbf ());");
+                 "menuselectedfcn", "reset (gcbf ());");
     uimenu (hui, "label", "Copy Figure to Clipboard", ...
-            "callback", @clipboard_cb, "separator", "on", ...
-            "accelerator", "c");
+                 "menuselectedfcn", @clipboard_cb, "separator", "on", ...
+                 "accelerator", "c");
     hmenu(2) = hui;
 
     ## Tools menu
     hui = uimenu (hf, "label", "&Tools", "handlevisibility", "off", ...
-                  "tag", "__default_menu__Tools");
+                      "tag", "__default_menu__Tools");
     uimenu (hui, "label", "Toggle &grid on all axes", "tag", "toggle", ...
-            "callback", @grid_cb);
+                 "menuselectedfcn", @grid_cb);
     uimenu (hui, "label", "Show grid on all axes", "tag", "on", ...
-            "callback", @grid_cb);
+                 "menuselectedfcn", @grid_cb);
     uimenu (hui, "label", "Hide grid on all axes", "tag", "off", ...
-            "callback", @grid_cb);
-    uimenu (hui, "label", "Auto&scale all axes", "callback", @autoscale_cb);
+                 "menuselectedfcn", @grid_cb);
+    uimenu (hui, "label", "Auto&scale all axes",
+                 "menuselectedfcn", @autoscale_cb);
 
     hui2 = uimenu (hui, "label", "GUI &Mode (on all axes)");
     uimenu (hui2, "label", "Pan x and y", "tag", "pan_on", ...
-            "callback", @guimode_cb);
+                  "menuselectedfcn", @guimode_cb);
     uimenu (hui2, "label", "Pan x only", "tag", "pan_xon", ...
-            "callback", @guimode_cb);
+                  "menuselectedfcn", @guimode_cb);
     uimenu (hui2, "label", "Pan y only", "tag", "pan_yon", ...
-            "callback", @guimode_cb);
+                  "menuselectedfcn", @guimode_cb);
     uimenu (hui2, "label", "Disable pan and rotate", "tag", ...
-            "no_pan_rotate", "callback", @guimode_cb);
+                  "no_pan_rotate", "menuselectedfcn", @guimode_cb);
     uimenu (hui2, "label", "Rotate on", "tag", "rotate3d", ...
-            "callback", @guimode_cb);
+                  "menuselectedfcn", @guimode_cb);
     uimenu (hui2, "label", "Enable mousezoom", "tag", "zoom_on", ...
-            "callback", @guimode_cb);
+                  "menuselectedfcn", @guimode_cb);
     uimenu (hui2, "label", "Disable mousezoom", "tag", "zoom_off", ...
-            "callback", @guimode_cb);
+                  "menuselectedfcn", @guimode_cb);
     hmenu(3) = hui;
 
     ## Default toolbar
     init_mouse_tools (hf);
     htb = uitoolbar (hf, "tag", "__default_toolbar__", ...
-                     "handlevisibility", "off", "visible", "off");
+                         "handlevisibility", "off", "visible", "off");
 
     ht(1) = uitoggletool (htb, "tooltipstring", "Pan", ...
-                          "tag", "__default_button_pan__", ...
-                          "__named_icon__", "figure-pan");
+                               "tag", "__default_button_pan__", ...
+                               "__named_icon__", "figure-pan");
     ht(2) = uitoggletool (htb, "tooltipstring", "Rotate", ...
-                          "tag", "__default_button_rotate__", ...
-                          "__named_icon__", "figure-rotate");
+                               "tag", "__default_button_rotate__", ...
+                               "__named_icon__", "figure-rotate");
 
     ht(3) = uitoggletool (htb, "tooltipstring", "Zoom In", ...
-                          "tag", "__default_button_zoomin__", ...
-                          "__named_icon__", "figure-zoom-in", ...
-                          "separator", "on");
+                               "tag", "__default_button_zoomin__", ...
+                               "__named_icon__", "figure-zoom-in", ...
+                               "separator", "on");
     ht(4) = uitoggletool (htb, "tooltipstring", "Zoom Out", ...
-                          "tag", "__default_button_zoomout__", ...
-                          "__named_icon__", "figure-zoom-out");
+                               "tag", "__default_button_zoomout__", ...
+                               "__named_icon__", "figure-zoom-out");
     uipushtool (htb, "tooltipstring", "Automatic limits for current axes", ...
-                "clickedcallback", @auto_cb, ...
-                "__named_icon__", "figure-zoom-original");
+                     "clickedcallback", @auto_cb, ...
+                     "__named_icon__", "figure-zoom-original");
 
     ht(5) = uitoggletool (htb, "tooltipstring", "Insert Text", ...
-                          "tag", "__default_button_text__", ...
-                          "separator", "on", "__named_icon__", "figure-text");
+                               "tag", "__default_button_text__", ...
+                               "separator", "on", ...
+                               "__named_icon__", "figure-text");
 
     uipushtool (htb, "tooltipstring", "Toggle current axes visibility", ...
-                "clickedcallback", @axes_cb, "separator", "on", ...
-                "__named_icon__", "figure-axes");
+                     "clickedcallback", @axes_cb, "separator", "on", ...
+                     "__named_icon__", "figure-axes");
     uipushtool (htb, "tooltipstring", "Toggle current axes grid visibility", ...
-                "clickedcallback", @grid_cb,  "__named_icon__", "figure-grid");
+                     "clickedcallback", @grid_cb, ...
+                     "__named_icon__", "figure-grid");
 
     set (ht(1), "oncallback", {@mouse_tools_cb, ht, "pan"}, ...
-         "offcallback", {@mouse_tools_cb, ht, "pan"});
+                "offcallback", {@mouse_tools_cb, ht, "pan"});
     set (ht(2), "oncallback", {@mouse_tools_cb, ht, "rotate"}, ...
-         "offcallback", {@mouse_tools_cb, ht, "rotate"});
+                "offcallback", {@mouse_tools_cb, ht, "rotate"});
     set (ht(3), "oncallback", {@mouse_tools_cb, ht, "zoomin"}, ...
-         "offcallback", {@mouse_tools_cb, ht, "zoomin"});
+                "offcallback", {@mouse_tools_cb, ht, "zoomin"});
     set (ht(4), "oncallback", {@mouse_tools_cb, ht, "zoomout"}, ...
-         "offcallback", {@mouse_tools_cb, ht, "zoomout"});
+                "offcallback", {@mouse_tools_cb, ht, "zoomout"});
     set (ht(5), "oncallback", {@mouse_tools_cb, ht, "text"}, ...
-         "offcallback", {@mouse_tools_cb, ht, "text"});
+                "offcallback", {@mouse_tools_cb, ht, "text"});
   endif
 
   if (! exist ("ht", "var"))
--- a/scripts/plot/util/private/__ghostscript__.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/util/private/__ghostscript__.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} __ghostscript__ (@var{@dots{}})
+## @deftypefn {} {[@var{gs_cmd}, @var{cleanup_cmd}] =} __ghostscript__ (@var{@dots{}})
 ## Undocumented internal function.
 ## @end deftypefn
 
--- a/scripts/plot/util/private/__gnuplot_print__.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/util/private/__gnuplot_print__.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} __gnuplot_print__ (@var{@dots{}})
+## @deftypefn {} {@var{opts} =} __gnuplot_print__ (@var{@dots{}})
 ## Undocumented internal function.
 ## @end deftypefn
 
--- a/scripts/plot/util/private/__opengl_print__.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/util/private/__opengl_print__.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} __opengl_print__ (@var{@dots{}})
+## @deftypefn {} {@var{opts} =} __opengl_print__ (@var{@dots{}})
 ## Undocumented internal function.
 ## @end deftypefn
 
@@ -71,9 +71,8 @@
       gl2ps_device = {sprintf("%snotxt", lower (suffix))};
       gl2ps_device{2} = "tex";
       if (dos_shell)
-        ## FIXME: this will only work on MinGW with the MSYS shell
-        pipeline = {sprintf('cat > "%s-inc.%s"', name, suffix)};
-        pipeline{2} = sprintf ('cat > "%s.tex"', name);
+        pipeline = {sprintf('findstr . > "%s-inc.%s"', name, suffix)};
+        pipeline{2} = sprintf ('findstr . > "%s.tex"', name);
       else
         pipeline = {sprintf('cat > "%s-inc.%s"', name, suffix)};
         pipeline{2} = sprintf ('cat > "%s.tex"', name);
--- a/scripts/plot/util/private/__print_parse_opts__.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/util/private/__print_parse_opts__.m	Mon Aug 29 13:58:00 2022 +0200
@@ -108,6 +108,10 @@
         arg_st.force_solid = -1;
       elseif (any (strcmp (arg, {"-opengl", "-painters"})))
         arg_st.renderer = arg(2:end);
+      elseif (strcmp (arg, "-image"))
+        arg_st.renderer = "opengl";
+      elseif (strcmp (arg, "-vector"))
+        arg_st.renderer = "painters";
       elseif (strcmp (arg, "-RGBImage"))
         arg_st.rgb_output = true;
         arg_st.renderer = "opengl";
--- a/scripts/plot/util/rotate3d.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/util/rotate3d.m	Mon Aug 29 13:58:00 2022 +0200
@@ -41,7 +41,7 @@
 ## @seealso{pan, zoom}
 ## @end deftypefn
 
-function h = rotate3d (hfig, option)
+function rotate3d (hfig, option)
 
   ## FIXME: Presumably should implement this for Matlab compatibility.
   if (nargin == 1 && nargout > 0 && isfigure (hfig))
--- a/scripts/plot/util/subplot.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/util/subplot.m	Mon Aug 29 13:58:00 2022 +0200
@@ -132,7 +132,7 @@
 ## @seealso{axes, plot, gca, set}
 ## @end deftypefn
 
-function h = subplot (varargin)
+function hax = subplot (varargin)
 
   align_axes = false;
   replace_axes = false;
@@ -357,7 +357,7 @@
   end_unwind_protect
 
   if (nargout > 0)
-    h = hsubplot;
+    hax = hsubplot;
   endif
 
 endfunction
--- a/scripts/plot/util/zoom.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/plot/util/zoom.m	Mon Aug 29 13:58:00 2022 +0200
@@ -64,7 +64,7 @@
 ## Eventually we need to also support these features:
 ## @deftypefnx {} {zoom_object_handle =} zoom (@var{hfig})
 
-function h = zoom (hfig, option)
+function zoom (hfig, option)
 
   ## FIXME: Presumably should implement this for Matlab compatibility.
   if (nargin == 1 && nargout > 0 && isfigure (hfig))
--- a/scripts/polynomial/compan.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/polynomial/compan.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} compan (@var{c})
+## @deftypefn {} {@var{A} =} compan (@var{c})
 ## Compute the companion matrix corresponding to polynomial coefficient vector
 ## @var{c}.
 ##
@@ -63,7 +63,7 @@
 
 function A = compan (c)
 
-  if (nargin < 1)
+  if (nargin != 1)
     print_usage ();
   endif
 
--- a/scripts/polynomial/conv.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/polynomial/conv.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} conv (@var{a}, @var{b})
-## @deftypefnx {} {} conv (@var{a}, @var{b}, @var{shape})
+## @deftypefn  {} {@var{y} =} conv (@var{a}, @var{b})
+## @deftypefnx {} {@var{y} =} conv (@var{a}, @var{b}, @var{shape})
 ## Convolve two vectors @var{a} and @var{b}.
 ##
 ## When @var{a} and @var{b} are the coefficient vectors of two polynomials, the
--- a/scripts/polynomial/pchip.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/polynomial/pchip.m	Mon Aug 29 13:58:00 2022 +0200
@@ -111,11 +111,6 @@
 
   ## Compute derivatives.
   d = __pchip_deriv__ (x, y, 2);
-  if (iscomplex (y))
-    ## __pchip_deriv__ ignores imaginary part.  Do it again for imag part.
-    ## FIXME: Adapt __pchip_deriv__ to correctly handle complex input.
-    d += 1i * __pchip_deriv__ (x, imag (y), 2);
-  endif
   d1 = d(:, 1:n-1);
   d2 = d(:, 2:n);
 
--- a/scripts/polynomial/poly.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/polynomial/poly.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} poly (@var{A})
-## @deftypefnx {} {} poly (@var{x})
+## @deftypefn  {} {@var{y} =} poly (@var{A})
+## @deftypefnx {} {@var{y} =} poly (@var{x})
 ## If @var{A} is a square @math{N}-by-@math{N} matrix, @code{poly (@var{A})}
 ## is the row vector of the coefficients of @code{det (z * eye (N) - A)},
 ## the characteristic polynomial of @var{A}.
@@ -61,17 +61,21 @@
     print_usage ();
   endif
 
-  m = min (size (x));
-  n = max (size (x));
-  if (m == 0)
+  if (! isnumeric (x))
+    error ("poly: input must be numeric, not type %s", class (x));
+  elseif (ndims (x) > 2)
+    error ("poly: input must be a vector or a square matrix");
+  elseif (isempty (x))
     y = 1;
     return;
-  elseif (m == 1)
+  elseif (isvector (x))
+    n = numel (x);
     v = x;
-  elseif (m == n)
+  elseif (! issquare (x))
+    error ("poly: input matrix must be square");
+  else
+    n = size (x,1);
     v = eig (x);
-  else
-    print_usage ();
   endif
 
   y = zeros (1, n+1);
@@ -113,4 +117,7 @@
 %! assert (y, [1 + 0i, -9 - 3i, 25 + 24i, -17 - 57i, -12 + 36i]);
 
 %!error <Invalid call> poly ()
-%!error poly ([1, 2, 3; 4, 5, 6])
+%!error <input must be numeric> poly ("foo")
+%!error <input must be numeric> poly ({1, "foo"; "bar", 1})
+%!error <input must be a vector or a square matrix> poly (ones (2, 2, 2))
+%!error <matrix must be square> poly ([1, 2, 3; 4, 5, 6])
--- a/scripts/polynomial/polyaffine.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/polynomial/polyaffine.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} polyaffine (@var{f}, @var{mu})
+## @deftypefn {} {@var{g} =} polyaffine (@var{f}, @var{mu})
 ## Return the coefficients of the polynomial vector @var{f} after an affine
 ## transformation.
 ##
--- a/scripts/polynomial/polyder.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/polynomial/polyder.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} polyder (@var{p})
-## @deftypefnx {} {[@var{k}] =} polyder (@var{a}, @var{b})
+## @deftypefn  {} {@var{k} =} polyder (@var{p})
+## @deftypefnx {} {@var{k} =} polyder (@var{a}, @var{b})
 ## @deftypefnx {} {[@var{q}, @var{d}] =} polyder (@var{b}, @var{a})
 ## Return the coefficients of the derivative of the polynomial whose
 ## coefficients are given by the vector @var{p}.
--- a/scripts/polynomial/polyint.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/polynomial/polyint.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} polyint (@var{p})
-## @deftypefnx {} {} polyint (@var{p}, @var{k})
+## @deftypefn  {} {@var{q} =} polyint (@var{p})
+## @deftypefnx {} {@var{q} =} polyint (@var{p}, @var{k})
 ## Return the coefficients of the integral of the polynomial whose
 ## coefficients are represented by the vector @var{p}.
 ##
@@ -34,7 +34,7 @@
 ## @seealso{polyder, polyval}
 ## @end deftypefn
 
-function retval = polyint (p, k)
+function q = polyint (p, k)
 
   if (nargin < 1)
     print_usage ();
@@ -53,7 +53,7 @@
   lp = length (p);
 
   if (lp == 0)
-    retval = [];
+    q = [];
     return;
   endif
 
@@ -62,7 +62,7 @@
     p = p.';
   endif
 
-  retval = [(p ./ [lp:-1:1]), k];
+  q = [(p ./ [lp:-1:1]), k];
 
 endfunction
 
--- a/scripts/polynomial/polyout.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/polynomial/polyout.m	Mon Aug 29 13:58:00 2022 +0200
@@ -47,7 +47,7 @@
 ## @seealso{polyreduce}
 ## @end deftypefn
 
-function y = polyout (c, x)
+function str = polyout (c, x)
 
   if (nargin < 1)
     print_usage ();
@@ -67,26 +67,26 @@
   if (n > 0)
     n1 = n+1;
 
-    tmp = coeff (c(1));
-    for ii = 2:n
-      if (real (c(ii)) < 0)
+    s = coeff (c(1));
+    for i = 2:n
+      if (real (c(i)) < 0)
         ns = " - ";
-        c(ii) = -c(ii);
+        c(i) = -c(i);
       else
         ns = " + ";
       endif
 
-      tmp = sprintf ("%s*%s^%d%s%s", tmp, x, n1-ii, ns, coeff (c(ii)));
+      s = sprintf ("%s*%s^%d%s%s", s, x, n1-i, ns, coeff (c(i)));
 
     endfor
   else
-    tmp = " ";
+    s = " ";
   endif
 
   if (nargout == 0)
-    disp (tmp);
+    disp (s);
   else
-    y = tmp;
+    str = s;
   endif
 
 endfunction
--- a/scripts/polynomial/polyreduce.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/polynomial/polyreduce.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} polyreduce (@var{c})
+## @deftypefn {} {@var{p} =} polyreduce (@var{c})
 ## Reduce a polynomial coefficient vector to a minimum number of terms by
 ## stripping off any leading zeros.
 ## @seealso{polyout}
--- a/scripts/polynomial/polyvalm.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/polynomial/polyvalm.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} polyvalm (@var{c}, @var{x})
+## @deftypefn {} {@var{y} =} polyvalm (@var{c}, @var{x})
 ## Evaluate a polynomial in the matrix sense.
 ##
 ## @code{polyvalm (@var{c}, @var{x})} will evaluate the polynomial in the
--- a/scripts/polynomial/roots.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/polynomial/roots.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} roots (@var{c})
+## @deftypefn {} {@var{r} =} roots (@var{c})
 ##
 ## Compute the roots of the polynomial @var{c}.
 ##
--- a/scripts/prefs/ispref.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/prefs/ispref.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,9 +24,9 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} ispref ("@var{group}", "@var{pref}")
-## @deftypefnx {} {} ispref ("@var{group}", @{"@var{pref1}", "@var{pref2"}, @dots{}@})
-## @deftypefnx {} {} ispref ("@var{group}")
+## @deftypefn  {} {@var{tf} =} ispref ("@var{group}", "@var{pref}")
+## @deftypefnx {} {@var{tf} =} ispref ("@var{group}", @{"@var{pref1}", "@var{pref2"}, @dots{}@})
+## @deftypefnx {} {@var{tf} =} ispref ("@var{group}")
 ## Return true if the named preference @var{pref} exists in the preference
 ## group @var{group}.
 ##
@@ -39,7 +39,7 @@
 ## @seealso{getpref, addpref, setpref, rmpref}
 ## @end deftypefn
 
-function retval = ispref (group, pref = "")
+function tf = ispref (group, pref = "")
 
   if (nargin == 0)
     print_usage ();
@@ -53,16 +53,16 @@
   endif
 
   if (nargin == 1)
-    retval = isfield (loadprefs (), group);
+    tf = isfield (loadprefs (), group);
   else
     prefs = loadprefs ();
     if (isfield (prefs, group))
-      retval = isfield (prefs.(group), pref);
+      tf = isfield (prefs.(group), pref);
     else
       if (ischar (pref))
-        retval = false;
+        tf = false;
       else
-        retval = false (size (pref));
+        tf = false (size (pref));
       endif
     endif
   endif
--- a/scripts/prefs/prefdir.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/prefs/prefdir.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,9 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} prefdir
-## @deftypefnx {} {} prefdir (1)
-## @deftypefnx {} {@var{dir} =} prefdir
+## @deftypefn  {} {@var{dir} =} prefdir
+## @deftypefnx {} {@var{dir} =} prefdir (1)
 ## Return the directory that holds the preferences for Octave.
 ##
 ## Examples:
--- a/scripts/prefs/private/prefsfile.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/prefs/private/prefsfile.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,12 +24,12 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} prefsfile ()
+## @deftypefn {} {@var{fname} =} prefsfile ()
 ## Return the full path and name of the file containing Octave preferences.
 ## @end deftypefn
 
-function retval = prefsfile ()
+function fname = prefsfile ()
 
-  retval = [prefdir() filesep() ".octave_prefs"];
+  fname = [prefdir() filesep() ".octave_prefs"];
 
 endfunction
--- a/scripts/profiler/html/flat_entry.html	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/profiler/html/flat_entry.html	Mon Aug 29 13:58:00 2022 +0200
@@ -1,5 +1,5 @@
 <tr>
-  <td><a href="func-%num.html">%name</a></td>
+  <td><a href="function-%num.html">%name</a></td>
   <td>%timeabs</td>
   <td>%timerel</td>
   <td>%calls</td>
--- a/scripts/profiler/profexplore.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/profiler/profexplore.m	Mon Aug 29 13:58:00 2022 +0200
@@ -36,13 +36,10 @@
 ## @seealso{profile, profshow}
 ## @end deftypefn
 
-## Built-in profiler.
 function profexplore (data)
 
   if (nargin == 0)
     data = profile ("info");
-  elseif (nargin < 1)
-    print_usage ();
   endif
 
   ## The actual work is done by a recursive worker function, since that
--- a/scripts/profiler/profexport.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/profiler/profexport.m	Mon Aug 29 13:58:00 2022 +0200
@@ -44,7 +44,6 @@
 ## @seealso{profshow, profexplore, profile}
 ## @end deftypefn
 
-## Built-in profiler.
 function profexport (dir, name = "", data)
 
   if (nargin < 1)
@@ -88,7 +87,7 @@
 
   __writeFlat (fullfile (dir, "index.html"), name, data.FunctionTable);
   for i = 1 : length (data.FunctionTable)
-    __writeFunc (fullfile (dir, sprintf ("func-%d.html", i)), name, ...
+    __writeFunc (fullfile (dir, sprintf ("function-%d.html", i)), name, ...
                  data.FunctionTable, i);
   endfor
 
@@ -176,7 +175,7 @@
     return;
   endif
 
-  template = "<a href='func-%num.html'>%name</a>";
+  template = "<a href='function-%num.html'>%name</a>";
 
   lst = "";
   for i = 1 : length (inds)
--- a/scripts/profiler/profshow.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/profiler/profshow.m	Mon Aug 29 13:58:00 2022 +0200
@@ -43,7 +43,6 @@
 ## @seealso{profexplore, profile}
 ## @end deftypefn
 
-## Built-in profiler.
 function profshow (data, n = 20)
 
   if (nargin == 0)
--- a/scripts/set/powerset.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/set/powerset.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} powerset (@var{a})
-## @deftypefnx {} {} powerset (@var{a}, "rows")
+## @deftypefn  {} {@var{p} =} powerset (@var{a})
+## @deftypefnx {} {@var{p} =} powerset (@var{a}, "rows")
 ## Compute the powerset (all subsets) of the set @var{a}.
 ##
 ## The set @var{a} must be a numerical matrix or a cell array of strings.  The
--- a/scripts/set/unique.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/set/unique.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,10 +24,10 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} unique (@var{x})
-## @deftypefnx {} {} unique (@var{x}, "rows")
-## @deftypefnx {} {} unique (@dots{}, "sorted")
-## @deftypefnx {} {} unique (@dots{}, "stable")
+## @deftypefn  {} {@var{y} =} unique (@var{x})
+## @deftypefnx {} {@var{y} =} unique (@var{x}, "rows")
+## @deftypefnx {} {@var{y} =} unique (@dots{}, "sorted")
+## @deftypefnx {} {@var{y} =} unique (@dots{}, "stable")
 ## @deftypefnx {} {[@var{y}, @var{i}, @var{j}] =} unique (@dots{})
 ## @deftypefnx {} {[@var{y}, @var{i}, @var{j}] =} unique (@dots{}, "first")
 ## @deftypefnx {} {[@var{y}, @var{i}, @var{j}] =} unique (@dots{}, "last")
--- a/scripts/set/uniquetol.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/set/uniquetol.m	Mon Aug 29 13:58:00 2022 +0200
@@ -33,7 +33,8 @@
 ## Two values, @var{x} and @var{y}, are within relative tolerance if
 ## @code{abs (@var{x} - @var{y}) <= @var{tol} * max (abs (@var{A}(:)))}.
 ##
-## The input @var{A} must be a floating point type (double or single).
+## The input @var{A} must be a real (non-complex) floating point type (double
+## or single).
 ##
 ## If @var{tol} is unspecified, the default tolerance is 1e-12 for double
 ## precision input or 1e-6 for single precision input.
@@ -89,7 +90,7 @@
 ## ## Inverse_Function (Function (x)) should return exactly x
 ## y = exp (log (x));
 ## D = unique ([x, y])
-## @result{} [1.0000   2.0000   3.0000   3.0000   4.0000   5.0000   5.0000]
+## @result{} [1   2   3   3   4   5   5]
 ## C = uniquetol ([x, y])
 ## @result{} [1   2   3   4   5]
 ## @end group
@@ -98,43 +99,36 @@
 ## @seealso{unique, union, intersect, setdiff, setxor, ismember}
 ## @end deftypefn
 
-
 function [c, ia, ic] = uniquetol (A, varargin)
 
   if (nargin < 1)
     print_usage ();
   endif
 
-  if (isempty (A))
-    c = A;
-    ia = [];
-    ic = [];
-    return;
-  endif
-
-  if (! isfloat (A) || iscomplex (A))
+  if (! (isfloat (A) && isreal (A)))
     error ("Octave:uniquetol:unsupported-type",
-           "uniquetol: A must be a double or single precision non-complex array");
+           "uniquetol: A must be a real floating point array");
   endif
 
   if (nargin == 1 || ischar (varargin{1}))
     tol = ifelse (isa (A, "double"), 1e-12, 1e-6);
-  elseif (! (isfloat (varargin{1}) && isscalar (varargin{1}))
-          || iscomplex (varargin{1}))
-    error ("Octave:uniquetol:unsupported-type",
-           "uniquetol: TOL must be a double or single precision non-complex scalar");
   else
     tol = varargin{1};
     varargin(1) = [];
+    if (! (isfloat (tol) && isreal (tol) && isscalar (tol)))
+      error ("Octave:uniquetol:unsupported-type",
+             "uniquetol: TOL must be a real floating point scalar");
+     endif
   endif
 
   if (mod (numel (varargin), 2))
-    error ("uniquetol: PROPERTY/VALUE arguments must be passed in pairs");
+    error ("uniquetol: PROPERTY/VALUE arguments must occur in pairs");
   endif
 
   by_rows = false;
   output_all_indices = false;
   data_scale = [];
+  calc_indices = nargout > 1;
 
   for k = 1:2:numel (varargin)
     if (! ischar (varargin{k}))
@@ -147,12 +141,12 @@
         error ('uniquetol: A must be a 2-D array when "ByRows" is true');
       endif
     elseif (strcmpi (varargin{k}, "OutputAllIndices"))
-      output_all_indices = logical (varargin{k+1});
+      output_all_indices = logical (varargin{k+1}) & calc_indices;
     elseif (strcmpi (varargin{k}, "DataScale"))
       data_scale = varargin{k+1}(:).';
       if (! isfloat (data_scale) || iscomplex (data_scale)
           || any (data_scale(:) < 0) || any (isnan (data_scale(:))))
-        error ("uniquetol: DataScale must be a non-NaN, positive floating point scalar or vector");
+        error ("uniquetol: DataScale must be a positive floating point scalar or vector, without NaNs");
       endif
       cols_data_scale = columns (data_scale);
       if (cols_data_scale != 1 && cols_data_scale != columns (A))
@@ -163,6 +157,25 @@
     endif
   endfor
 
+  if (isempty (A))
+    ## hack for Matlab empty input compatibility
+    sz_A = size (A);
+    if (by_rows)
+      c = A;
+      sz_A(2) = 1;
+      ia = ones (sz_A);
+      ic = ones (sz_A);
+    else
+      c = ones (0, 1, class (A));
+      if (sz_A(1) == 1)
+        c = c.';
+      endif
+      ia = ones (0, 1);
+      ic = ones (0, 1);
+    endif
+    return;
+  endif
+
   if (isempty (data_scale))
     data_scale = max (abs (A(! isinf (A))(:)));
   endif
@@ -170,43 +183,48 @@
   tol *= data_scale;
 
   if (by_rows)
+    ## Start matrix in sorted order, retain sorting and inverting indices.
+    if (calc_indices)
+      [A, srtA] = sortrows (A);
+      [~, inv_srtA] = sort (srtA);
+    else
+      A = sortrows (A);
+    endif
 
-    nr = rows (A);
-    nc = columns (A);
-    Iall = zeros (nr, 1);
-    I = NaN (nc, 1);
+    [nr, nc] = size (A);
+    I = zeros (nr, 1);
     ia = {};
-    J = NaN (nc, 1);
+    J = zeros (nr, 1);
     j = 1;
-    ii = 0;
 
     for i = 1:nr
-      if (any (Iall == i))
-        continue;
+      if (J(i))
+        continue;  # row previously compared equal
+      endif
+
+      Arow_i = A(i,:);
+      eq_rows = all (abs (A - Arow_i) <= tol, 2);
+      eq_rows(i,1) = eq_rows(i,1) || any (! isfinite (Arow_i), 2);
+      if (output_all_indices)
+        ia_tmp = find (eq_rows);
+        ia{end+1,1} = sort (srtA(ia_tmp));
       else
-        equ = all (abs (A - A(i,:)) <= tol, 2);
-        equ(i,1) = equ(i,1) || any (! isfinite (A(i,:)), 2);
-        sumeq = sum (equ);
-        ia_tmp = find (equ);
-        if (output_all_indices)
-          ia{end+1} = ia_tmp;
-        endif
-        Iall(ii+(1:sumeq)) = ia_tmp;
-        I(j) = ia_tmp(1);
-        J(equ) = j;
-        ii += sumeq;
-        j += 1;
+        ia_tmp = find (eq_rows, 1);
       endif
+      I(j) = ia_tmp(1);
+      J(eq_rows) = j;
+      j += 1;
     endfor
 
-    I(isnan (I)) = [];
-    J(isnan (J)) = [];
+    I = I(1:j-1);
     c = A(I,:);
 
-    if (! output_all_indices)
-      ia = I(1:j-1);
+    if (calc_indices)
+      if (! output_all_indices)
+        ia = srtA(I(1:j-1));
+      endif
+      ic = J(inv_srtA);
     endif
-    ic = J;
 
   else
     isrowvec = isrow (A);
@@ -247,7 +265,7 @@
     endif
     if (output_all_indices)
       nu = cumsumue(end);
-      ia = cell (1, nu);
+      ia = cell (nu, 1);
       for k = 1:nu
         ia{k} = setdiff (sAi(cumsumue==k), findisnanA);
       endfor
@@ -256,20 +274,31 @@
     endif
 
     if (anyisnanA)
-      rowsc1 = rows (c) + (1:sum (isnanA));
+      rowsc1 = [1:sum(isnanA(:))]';
+      if (! all (isnanA))
+        rowsc1 += rows (c);
+      endif
       c(rowsc1) = NaN;
-      ia(rowsc1) = findisnanA;
       ic(isnanA) = rowsc1;
+      if (output_all_indices)
+        ia(rowsc1) = num2cell (findisnanA);
+      else
+        ia(rowsc1) = findisnanA;
+      endif
+
+      ## if numel (c) was 1, appending NaNs creates a row vector instead of
+      ## expected column vector.
+      if (isrow (c))
+        c = c.';
+      endif
     endif
 
-    ## FIXME: Matlab-compatible orientation of output
-    ## Actually, Matlab prefers row vectors (2021/03/24), but this is different
-    ## from all the other set functions which prefer column vectors.  Assume
-    ## that this is a bug in Matlab's implementation and prefer column vectors.
+    ## Matlab compatibility: Outputs are column vectors unless the input
+    ## is a row vector, in which case the output c is also a row vector.
+    ## ia and ic are always column vectors. (verified Matlab 2022a)
     if (isrowvec)
       c = c.';
     endif
-
   endif
 
 endfunction
@@ -277,14 +306,11 @@
 
 %!assert (uniquetol ([1 1 2; 1 2 1; 1 1 2+10*eps]), [1;2])
 %!assert (uniquetol ([1 1 2; 1 0 1; 1 1 2+10*eps], "byrows", true),
-%!        [1 1 2; 1 0 1])
-%!assert (uniquetol ([]), [])
+%!        [1 0 1; 1 1 2])
 %!assert (uniquetol ([1]), [1])
 %!assert (uniquetol ([2, 1]), [1, 2]);
 %!assert (uniquetol ([1; 2]), [1; 2])
 %!assert (uniquetol ([-Inf, 1, NaN, Inf, NaN, Inf]), [-Inf, 1, Inf, NaN, NaN]);
-%!assert (uniquetol (zeros (1, 0)), zeros (1, 0));
-%!assert (uniquetol (zeros (1, 0), "byrows", true), zeros (1, 0))
 %!assert (uniquetol ([1,2,2,3,2,4], "byrows", true), [1,2,2,3,2,4])
 %!assert (uniquetol ([1,2,2,3,2,4]), [1,2,3,4])
 %!assert (uniquetol ([1,2,2,3,2,4].', "byrows", true), [1;2;3;4])
@@ -296,6 +322,12 @@
 %!assert (uniquetol (single ([1,2,2,3,2,4].'), "byrows", true),
 %!        single ([1;2;3;4]))
 
+## Test 2D array sorting
+%!test
+%! a = [magic(3); 2 * magic(3)];
+%! assert (uniquetol (a), [1:10,12,14,16,18]')
+%! assert (uniquetol (a, "byrows", true), sortrows (a))
+
 ## Matlab compatibility of output
 %!test
 %! x = 1:0.045:3;
@@ -314,8 +346,8 @@
 %! A = [2, 3, 4; 2, 3, 4];
 %! [c, ia, ic] = uniquetol (A, "byrows", true);
 %! assert (c, [2, 3, 4]);
-%! assert (A(ia,:), c);
-%! assert (c(ic,:), A);
+%! assert (ia, 1);
+%! assert (ic, [1;1]);
 
 %!test
 %! x = (2:7)'*pi;
@@ -328,7 +360,7 @@
 %! A = [0.06, 0.21, 0.38; 0.38, 0.21, 0.39; 0.54, 0.56, 0.41; 0.46, 0.52, 0.95];
 %! B = log (exp (A));
 %! C = uniquetol ([A; B], "ByRows", true);
-%! assert (C, A);
+%! assert (C, sortrows(A), 10*eps);
 
 ## Test "DataScale" Property
 %!test
@@ -341,23 +373,128 @@
 %! A = [.1 .2 .3 10];
 %! [C, ia, ic] = uniquetol (A, .1, "OutputAllIndices", true);
 %! assert (C, [.1, 10]);
-%! assert (ia, {(1:3)', 4});
+%! assert (ia, {(1:3)'; 4});
 %! assert (ic, [1; 1; 1; 2]);
 
+## Test NaN inputs
+%!assert (uniquetol (NaN), NaN)
+%!assert (uniquetol ([NaN NaN]), [NaN NaN])
+%!assert (uniquetol ([NaN NaN]'), [NaN NaN]')
+%!assert (uniquetol (NaN(2,2)), NaN(4,1))
+
+%!test
+%! a = [magic(3); 2 * magic(3)];
+%! a(4:5) = NaN;
+%! [c, ia, ic] = uniquetol (a);
+%! assert (c, [1:10,12,14,18, NaN, NaN]');
+%! assert (ia, [7,10,2,3,8,13,14,1,9,11,16,17,12,4,5]');
+%! assert (ic, [8,3,4,14,15,8,1,5,9,2,10,13,6,7,2,11,12,4]');
+%! [c, ia, ic] = uniquetol (single (a));
+%! assert (class (c), "single");
+%! assert (class (ia), "double");
+%! assert (class (ic), "double");
+%! [c, ia, ic] = uniquetol (a, "ByRows", true);
+%! assert (c, sortrows (a));
+%! assert (ia, [2,3,1,6,4,5]');
+%! assert (ic, [3,1,2,5,6,4]');
+%! [c, ia, ic] = uniquetol (single (a), "ByRows", true);
+%! assert (class (c), "single");
+%! assert (class (ia), "double");
+%! assert (class (ic), "double");
+%! [c, ia, ic] = uniquetol (a, "OutputAllIndices", true);
+%! assert (ia, {7;[10;15];2;[3;18];8;13;14;[1;6];9;11;16;17;12;4;5});
+%! [c, ia, ic] = uniquetol (single (a), "OutputAllIndices", true);
+%! assert (class (c), "single");
+%! assert (class (ia{1}), "double");
+%! assert (class (ic), "double");
+%! [c, ia, ic] = uniquetol (a, "OutputAllIndices", true, "ByRows", true);
+%! assert (ia, {2;3;1;6;4;5});
+%! [c, ia, ic] = uniquetol (single (a),
+%!                          "OutputAllIndices", true, "ByRows", true);
+%! assert (class (c), "single");
+%! assert (class (ia{1}), "double");
+%! assert (class (ic), "double");
+
+## Test empty input compatibility
+%!test
+%! [c, ia, ic] = uniquetol ([]);
+%! assert (c, ones (0,1));
+%! assert (ia, ones (0,1));
+%! assert (ic, ones (0,1));
+%!test
+%! [c, ia, ic] = uniquetol ([], "byrows", true);
+%! assert (c, []);
+%! assert (ia, ones (0,1));
+%! assert (ic, ones (0,1));
+%!test
+%! [c, ia, ic] = uniquetol (ones (0,1));
+%! assert (c, ones (0,1));
+%! assert (ia, ones (0,1));
+%! assert (ic, ones (0,1));
+%!test
+%! [c, ia, ic] = uniquetol (ones (0,1), "byrows", true);
+%! assert (c, ones (0,1));
+%! assert (ia, ones (0,1));
+%! assert (ic, ones (0,1));
+%!test
+%! [c, ia, ic] = uniquetol (ones (1,0));
+%! assert (c, ones (1,0));
+%! assert (ia, ones (0,1));
+%! assert (ic, ones (0,1));
+%!test
+%! [c, ia, ic] = uniquetol (ones (1,0), "byrows", true);
+%! assert (c, ones (1,0));
+%! assert (ia, 1);
+%! assert (ic, 1);
+%!test
+%! [c, ia, ic] = uniquetol (ones (1,0,2));
+%! assert (c, ones (1,0));
+%! assert (ia, ones (0,1));
+%! assert (ic, ones (0,1));
+%!test
+%! [c, ia, ic] = uniquetol (ones (0,1,2));
+%! assert (c, ones (0,1));
+%! assert (ia, ones (0,1));
+%! assert (ic, ones (0,1));
+%!test
+%! [c, ia, ic] = uniquetol (ones (1,2,0));
+%! assert (c, ones (1,0));
+%! assert (ia, ones (0,1));
+%! assert (ic, ones (0,1));
+%!test
+%! [c, ia, ic] = uniquetol (single ([]));
+%! assert (class (c), "single");
+%! assert (class (ia), "double");
+%! assert (class (ic), "double");
+%!test
+%! [c, ia, ic] = uniquetol (single ([]), "byrows", true);
+%! assert (class (c), "single");
+%! assert (class (ia), "double");
+%! assert (class (ic), "double");
+%!test
+%! [c, ia, ic] = uniquetol (single ([]), "OutputAllIndices", true);
+%! assert (class (c), "single");
+%! assert (class (ia), "double");
+%! assert (class (ic), "double");
+
+
 ## Test input validation
 %!error <Invalid call> uniquetol ()
-%!error <A must be a double or single precision> uniquetol (int8 (1))
-%!error <A must be .* non-complex> uniquetol (1i)
-%!error <TOL must be a double .* precision> uniquetol (1, int8 (1))
-%!error <TOL must be a .* scalar> uniquetol (1, [1, 2])
-%!error <TOL must be .* non-complex> uniquetol (1, 1i)
-%!error <arguments must be passed in pairs> uniquetol (1, 2, "byrows")
+%!error <A must be a real floating point array> uniquetol (int8 (1))
+%!error <A must be a real floating point array> uniquetol (1i)
+%!error <TOL must be a real floating point scalar> uniquetol (1, int8 (1))
+%!error <TOL must be a real floating point scalar> uniquetol (1, [1, 2])
+%!error <TOL must be a real floating point scalar> uniquetol (1, 1i)
+%!error <arguments must occur in pairs> uniquetol (1, 2, "byrows")
 %!error <PROPERTY must be a string> uniquetol (1, 2, 3, "bar")
 %!error <A must be a 2-D array> uniquetol (ones (2,2,2), "byrows", true)
+%!error <A must be a 2-D array> uniquetol (ones (0,1,2), "byrows", true)
+%!error <A must be a 2-D array> uniquetol (ones (1,0,2), "byrows", true)
+%!error <A must be a 2-D array> uniquetol (ones (1,2,0), "byrows", true)
 %!error <DataScale must be a .* floating point> uniquetol (1, "DataScale", '1')
+%!error <DataScale must be .* positive> uniquetol (1, "DataScale", 1i)
 %!error <DataScale must be .* positive> uniquetol (1, "DataScale", -1)
-%!error <DataScale must be .* positive> uniquetol (1, "DataScale", 1i)
-%!error <DataScale must be a non-NaN> uniquetol (1, "DataScale", NaN)
+%!error <DataScale must be .* without NaNs> uniquetol (1, "DataScale", NaN)
 %!error <invalid DataScale size> uniquetol (1, "DataScale", [1 2])
 %!error <unknown property 'foo'> uniquetol (1, "foo", "bar")
 %!error <unknown property 'foo'> uniquetol (1, 2, "foo", "bar")
--- a/scripts/signal/arch_rnd.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/signal/arch_rnd.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} arch_rnd (@var{a}, @var{b}, @var{t})
+## @deftypefn {} {@var{y} =} arch_rnd (@var{a}, @var{b}, @var{t})
 ## Simulate an ARCH sequence of length @var{t} with AR coefficients @var{b} and
 ## CH coefficients @var{a}.
 ##
--- a/scripts/signal/arma_rnd.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/signal/arma_rnd.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} arma_rnd (@var{a}, @var{b}, @var{v}, @var{t}, @var{n})
+## @deftypefn {} {@var{x} =} arma_rnd (@var{a}, @var{b}, @var{v}, @var{t}, @var{n})
 ## Return a simulation of the ARMA model.
 ##
 ## The ARMA model is defined by
--- a/scripts/signal/autoreg_matrix.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/signal/autoreg_matrix.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} autoreg_matrix (@var{y}, @var{k})
+## @deftypefn {} {@var{x} =} autoreg_matrix (@var{y}, @var{k})
 ## Given a time series (vector) @var{y}, return a matrix with ones in the first
 ## column and the first @var{k} lagged values of @var{y} in the other columns.
 ##
@@ -35,7 +35,7 @@
 ## The resulting matrix may be used as a regressor matrix in autoregressions.
 ## @end deftypefn
 
-function X = autoreg_matrix (y, k)
+function x = autoreg_matrix (y, k)
 
   if (nargin != 2)
     print_usage ();
@@ -47,9 +47,9 @@
 
   T = length (y);
   y = reshape (y, T, 1);
-  X = ones (T, k+1);
+  x = ones (T, k+1);
   for j = 1 : k
-    X(:, j+1) = [(zeros (j, 1)); y(1:T-j)];
+    x(:, j+1) = [(zeros (j, 1)); y(1:T-j)];
   endfor
 
 endfunction
--- a/scripts/signal/bartlett.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/signal/bartlett.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} bartlett (@var{m})
+## @deftypefn {} {@var{c} =} bartlett (@var{m})
 ## Return the filter coefficients of a Bartlett (triangular) window of length
 ## @var{m}.
 ##
@@ -35,11 +35,11 @@
 
 function c = bartlett (m)
 
-  if (nargin < 1)
+  if (nargin != 1)
     print_usage ();
   endif
 
-  if (! (isscalar (m) && (m == fix (m)) && (m > 0)))
+  if (! (isscalar (m) && m > 0 && m == fix (m)))
     error ("bartlett: M must be a positive integer");
   endif
 
--- a/scripts/signal/blackman.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/signal/blackman.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,9 +24,9 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} blackman (@var{m})
-## @deftypefnx {} {} blackman (@var{m}, "periodic")
-## @deftypefnx {} {} blackman (@var{m}, "symmetric")
+## @deftypefn  {} {@var{c} =} blackman (@var{m})
+## @deftypefnx {} {@var{c} =} blackman (@var{m}, "periodic")
+## @deftypefnx {} {@var{c} =} blackman (@var{m}, "symmetric")
 ## Return the filter coefficients of a @nospell{Blackman} window of length
 ## @var{m}.
 ##
@@ -46,7 +46,7 @@
     print_usage ();
   endif
 
-  if (! (isscalar (m) && (m == fix (m)) && (m > 0)))
+  if (! (isscalar (m) && m > 0 && m == fix (m)))
     error ("blackman: M must be a positive integer");
   endif
 
--- a/scripts/signal/detrend.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/signal/detrend.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} detrend (@var{x}, @var{p})
+## @deftypefn {} {@var{y} =} detrend (@var{x}, @var{p})
 ## If @var{x} is a vector, @code{detrend (@var{x}, @var{p})} removes the
 ## best fit of a polynomial of order @var{p} from the data @var{x}.
 ##
@@ -55,7 +55,7 @@
   elseif (ischar (p) && strcmpi (p, "linear"))
     p = 1;
   elseif (! isscalar (p) || p < 0 || p != fix (p))
-    error ("detrend: P must be \"constant\", \"linear\", or a positive integer");
+    error ('detrend: P must be "constant", "linear", or a positive integer');
   endif
 
   [m, n] = size (x);
@@ -107,4 +107,3 @@
 %!error detrend (1, "invalid")
 %!error detrend (1, -1)
 %!error detrend (1, 1.25)
-
--- a/scripts/signal/durbinlevinson.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/signal/durbinlevinson.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} durbinlevinson (@var{c}, @var{oldphi}, @var{oldv})
+## @deftypefn {} {[@var{newphi}, @var{newv}] =} durbinlevinson (@var{c}, @var{oldphi}, @var{oldv})
 ## Perform one step of the @nospell{Durbin-Levinson} algorithm.
 ##
 ## The vector @var{c} specifies the autocovariances
--- a/scripts/signal/fftconv.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/signal/fftconv.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} fftconv (@var{x}, @var{y})
-## @deftypefnx {} {} fftconv (@var{x}, @var{y}, @var{n})
+## @deftypefn  {} {@var{c} =} fftconv (@var{x}, @var{y})
+## @deftypefnx {} {@var{c} =} fftconv (@var{x}, @var{y}, @var{n})
 ## Convolve two vectors using the FFT for computation.
 ##
 ## @code{c = fftconv (@var{x}, @var{y})} returns a vector of length equal to
--- a/scripts/signal/fftfilt.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/signal/fftfilt.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} fftfilt (@var{b}, @var{x})
-## @deftypefnx {} {} fftfilt (@var{b}, @var{x}, @var{n})
+## @deftypefn  {} {@var{y} =} fftfilt (@var{b}, @var{x})
+## @deftypefnx {} {@var{y} =} fftfilt (@var{b}, @var{x}, @var{n})
 ## Filter @var{x} with the FIR filter @var{b} using the FFT.
 ##
 ## If @var{x} is a matrix, filter each column of the matrix.
--- a/scripts/signal/fftshift.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/signal/fftshift.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} fftshift (@var{x})
-## @deftypefnx {} {} fftshift (@var{x}, @var{dim})
+## @deftypefn  {} {@var{y} =} fftshift (@var{x})
+## @deftypefnx {} {@var{y} =} fftshift (@var{x}, @var{dim})
 ## Perform a shift of the vector @var{x}, for use with the @code{fft} and
 ## @code{ifft} functions, in order to move the frequency 0 to the center of
 ## the vector or matrix.
@@ -49,7 +49,7 @@
 ## @seealso{ifftshift}
 ## @end deftypefn
 
-function retval = fftshift (x, dim)
+function y = fftshift (x, dim)
 
   if (nargin < 1)
     print_usage ();
@@ -69,12 +69,12 @@
     idx = cell ();
     idx = repmat ({':'}, nd, 1);
     idx{dim} = [sz2+1:sz(dim), 1:sz2];
-    retval = x(idx{:});
+    y = x(idx{:});
   else
     if (isvector (x))
       xl = length (x);
       xx = ceil (xl/2);
-      retval = x([xx+1:xl, 1:xx]);
+      y = x([xx+1:xl, 1:xx]);
     else
       nd = ndims (x);
       sz = size (x);
@@ -83,7 +83,7 @@
       for i = 1:nd
         idx{i} = [sz2(i)+1:sz(i), 1:sz2(i)];
       endfor
-      retval = x(idx{:});
+      y = x(idx{:});
     endif
   endif
 
--- a/scripts/signal/fractdiff.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/signal/fractdiff.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} fractdiff (@var{x}, @var{d})
+## @deftypefn {} {@var{fd} =} fractdiff (@var{x}, @var{d})
 ## Compute the fractional differences @math{(1-L)^d x} where @math{L}
 ## denotes the lag-operator and @math{d} is greater than -1.
 ## @end deftypefn
--- a/scripts/signal/hamming.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/signal/hamming.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,9 +24,9 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} hamming (@var{m})
-## @deftypefnx {} {} hamming (@var{m}, "periodic")
-## @deftypefnx {} {} hamming (@var{m}, "symmetric")
+## @deftypefn  {} {@var{c} =} hamming (@var{m})
+## @deftypefnx {} {@var{c} =} hamming (@var{m}, "periodic")
+## @deftypefnx {} {@var{c} =} hamming (@var{m}, "symmetric")
 ## Return the filter coefficients of a Hamming window of length @var{m}.
 ##
 ## If the optional argument @qcode{"periodic"} is given, the periodic form
@@ -45,7 +45,7 @@
     print_usage ();
   endif
 
-  if (! (isscalar (m) && (m == fix (m)) && (m > 0)))
+  if (! (isscalar (m) && m > 0 && m == fix (m)))
     error ("hamming: M must be a positive integer");
   endif
 
--- a/scripts/signal/hanning.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/signal/hanning.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,9 +24,9 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} hanning (@var{m})
-## @deftypefnx {} {} hanning (@var{m}, "periodic")
-## @deftypefnx {} {} hanning (@var{m}, "symmetric")
+## @deftypefn  {} {@var{c} =} hanning (@var{m})
+## @deftypefnx {} {@var{c} =} hanning (@var{m}, "periodic")
+## @deftypefnx {} {@var{c} =} hanning (@var{m}, "symmetric")
 ## Return the filter coefficients of a Hanning window of length @var{m}.
 ##
 ## If the optional argument @qcode{"periodic"} is given, the periodic form
@@ -45,7 +45,7 @@
     print_usage ();
   endif
 
-  if (! (isscalar (m) && (m == fix (m)) && (m > 0)))
+  if (! (isscalar (m) && m > 0 && m == fix (m)))
     error ("hanning: M must be a positive integer");
   endif
 
--- a/scripts/signal/hurst.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/signal/hurst.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} hurst (@var{x})
+## @deftypefn {} {@var{H} =} hurst (@var{x})
 ## Estimate the Hurst parameter of sample @var{x} via the rescaled range
 ## statistic.
 ##
@@ -33,14 +33,14 @@
 
 function H = hurst (x)
 
-  if (nargin < 1)
+  if (nargin != 1)
     print_usage ();
   endif
 
   if (isscalar (x))
     error ("hurst: X must not be a scalar");
   elseif (isvector (x))
-    x = reshape (x, length (x), 1);
+    x = x(:);  # always use column vector
   endif
 
   [xr, xc] = size (x);
--- a/scripts/signal/ifftshift.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/signal/ifftshift.m	Mon Aug 29 13:58:00 2022 +0200
@@ -33,40 +33,40 @@
 ## @seealso{fftshift}
 ## @end deftypefn
 
-function retval = ifftshift (x, dim)
+function x = ifftshift (y, dim)
 
   if (nargin < 1)
     print_usage ();
   endif
 
-  if (! (isnumeric (x) || islogical (x) || ischar (x)))
-    error ("ifftshift: X must be a vector or matrix");
+  if (! (isnumeric (y) || islogical (y) || ischar (y)))
+    error ("ifftshift: Y must be a vector or matrix");
   endif
 
   if (nargin == 2)
     if (! (isscalar (dim) && dim > 0 && dim == fix (dim)))
       error ("ifftshift: dimension DIM must be a positive integer");
     endif
-    nd = ndims (x);
-    sz = size (x);
+    nd = ndims (y);
+    sz = size (y);
     sz2 = floor (sz(dim) / 2);
     idx = repmat ({':'}, nd, 1);
     idx{dim} = [sz2+1:sz(dim), 1:sz2];
-    retval = x(idx{:});
+    x = y(idx{:});
   else
-    if (isvector (x))
-      xl = length (x);
-      xx = floor (xl/2);
-      retval = x([xx+1:xl, 1:xx]);
+    if (isvector (y))
+      yl = length (y);
+      y2 = floor (yl/2);
+      x = y([y2+1:yl, 1:y2]);
     else
-      nd = ndims (x);
-      sz = size (x);
+      nd = ndims (y);
+      sz = size (y);
       sz2 = floor (sz ./ 2);
       idx = cell ();
       for i = 1:nd
         idx{i} = [sz2(i)+1:sz(i), 1:sz2(i)];
       endfor
-      retval = x(idx{:});
+      x = y(idx{:});
     endif
   endif
 
--- a/scripts/signal/movfun.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/signal/movfun.m	Mon Aug 29 13:58:00 2022 +0200
@@ -227,29 +227,29 @@
 
   ## Obtain function for boundary conditions
   if (isnumeric (bc))
-    bcfunc = @replaceval_bc;
-    bcfunc (true, bc);  # initialize replaceval function with value
+    bcfcn = @replaceval_bc;
+    bcfcn (true, bc);  # initialize replaceval function with value
   else
     switch (tolower (bc))
       case "shrink"
-        bcfunc = @shrink_bc;
+        bcfcn = @shrink_bc;
 
       case "discard"
-        bcfunc = [];
+        bcfcn = [];
         C -= length (Cpre);
         Cpre = Cpos = [];
         N = length (C);
         szx(dperm(1)) = N;
 
       case "fill"
-        bcfunc = @replaceval_bc;
-        bcfunc (true, NaN);
+        bcfcn = @replaceval_bc;
+        bcfcn (true, NaN);
 
       case "same"
-        bcfunc = @same_bc;
+        bcfcn = @same_bc;
 
       case "periodic"
-        bcfunc = @periodic_bc;
+        bcfcn = @periodic_bc;
 
     endswitch
   endif
@@ -279,7 +279,7 @@
   ## FIXME: Is it faster with cellfun?  Don't think so, but needs testing.
   y = zeros (N, ncols, soutdim);
   parfor i = 1:ncols
-    y(:,i,:) = movfun_oncol (fcn_, x(:,i), wlen, bcfunc,
+    y(:,i,:) = movfun_oncol (fcn_, x(:,i), wlen, bcfcn,
                              slc, C, Cpre, Cpos, win, soutdim);
   endparfor
 
@@ -290,7 +290,7 @@
 
 endfunction
 
-function y = movfun_oncol (fcn, x, wlen, bcfunc, slcidx, C, Cpre, Cpos, win, odim)
+function y = movfun_oncol (fcn, x, wlen, bcfcn, slcidx, C, Cpre, Cpos, win, odim)
 
   N = length (Cpre) + length (C) + length (Cpos);
   y = NA (N, odim);
@@ -300,10 +300,10 @@
 
   ## Process boundaries
   if (! isempty (Cpre))
-    y(Cpre,:) = bcfunc (fcn, x, Cpre, win, wlen, odim);
+    y(Cpre,:) = bcfcn (fcn, x, Cpre, win, wlen, odim);
   endif
   if (! isempty (Cpos))
-    y(Cpos,:) = bcfunc (fcn, x, Cpos, win, wlen, odim);
+    y(Cpos,:) = bcfcn (fcn, x, Cpos, win, wlen, odim);
   endif
 
 endfunction
--- a/scripts/signal/private/rectangle_lw.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/signal/private/rectangle_lw.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,16 +24,18 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} rectangle_lw (@var{n}, @var{b})
-## Rectangular lag window.  Subfunction used for spectral density
-## estimation.
+## @deftypefn {} {@var{c} =} rectangle_lw (@var{n}, @var{b})
+## Rectangular lag window.
+##
+## Subfunction used for spectral density estimation.
+## @seealso{spectral_adf}
 ## @end deftypefn
 
-function retval = rectangle_lw (n, b)
+function c = rectangle_lw (n, b)
 
-  retval = zeros (n, 1);
+  c = zeros (n, 1);
   t = floor (1 / b);
 
-  retval(1:t, 1) = ones (t, 1);
+  c(1:t) = 1;
 
 endfunction
--- a/scripts/signal/private/rectangle_sw.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/signal/private/rectangle_sw.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,19 +24,21 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} rectangle_sw (@var{n}, @var{b})
-## Rectangular spectral window.  Subfunction used for spectral density
-## estimation.
+## @deftypefn {} {@var{c} =} rectangle_sw (@var{n}, @var{b})
+## Rectangular spectral window.
+##
+## Subfunction used for spectral density estimation.
+## @seealso{spectral_xdf}
 ## @end deftypefn
 
-function retval = rectangle_sw (n, b)
+function c = rectangle_sw (n, b)
 
-  retval = zeros (n, 1);
-  retval(1) = 2 / b + 1;
+  c = zeros (n, 1);
+  c(1) = 2 / b + 1;
 
   l = (2:n)' - 1;
   l = 2 * pi * l / n;
 
-  retval(2:n) = sin ((2/b + 1) * l / 2) ./ sin (l / 2);
+  c(2:n) = sin ((2/b + 1) * l / 2) ./ sin (l / 2);
 
 endfunction
--- a/scripts/signal/private/triangle_lw.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/signal/private/triangle_lw.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,14 +24,16 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} triangle_lw (@var{n}, @var{b})
-## Triangular lag window.  Subfunction used for spectral density
-## estimation.
+## @deftypefn {} {@var{c} =} triangle_lw (@var{n}, @var{b})
+## Triangular lag window.
+##
+## Subfunction used for spectral density estimation.
+## @seealso{spectral_adf}
 ## @end deftypefn
 
-function retval = triangle_lw (n, b)
+function c = triangle_lw (n, b)
 
-  retval = 1 - (0 : n-1)' * b;
-  retval = max ([retval'; (zeros (1, n))])';
+  c = 1 - (0 : n-1)' * b;
+  c = max ([c'; (zeros (1, n))])';
 
 endfunction
--- a/scripts/signal/sinc.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/signal/sinc.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} sinc (@var{x})
+## @deftypefn {} {@var{y} =} sinc (@var{x})
 ## Compute the sinc function.
 ##
 ## Return
@@ -36,19 +36,19 @@
 ## @end ifnottex
 ## @end deftypefn
 
-function result = sinc (x)
+function y = sinc (x)
 
-  if (nargin < 1)
+  if (nargin != 1)
     print_usage ();
   endif
 
-  result = ones (size (x));
+  y = ones (size (x));
 
   i = (x != 0);
 
   if (any (i(:)))
     t = pi * x(i);
-    result(i) = sin (t) ./ t;
+    y(i) = sin (t) ./ t;
   endif
 
 endfunction
--- a/scripts/signal/sinetone.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/signal/sinetone.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} sinetone (@var{freq}, @var{rate}, @var{sec}, @var{ampl})
+## @deftypefn {} {@var{y} =} sinetone (@var{freq}, @var{rate}, @var{sec}, @var{ampl})
 ## Return a sinetone of frequency @var{freq} with a length of @var{sec}
 ## seconds at sampling rate @var{rate} and with amplitude @var{ampl}.
 ##
@@ -34,7 +34,7 @@
 ## @seealso{sinewave}
 ## @end deftypefn
 
-function retval = sinetone (freq, rate = 8000, sec = 1, ampl = 64)
+function y = sinetone (freq, rate = 8000, sec = 1, ampl = 64)
 
   if (nargin < 1)
     print_usage ();
@@ -52,10 +52,10 @@
   n = length (freq);
   ns = round (rate * sec);
 
-  retval = zeros (ns, n);
+  y = zeros (ns, n);
 
   for k = 1:n
-    retval(:, k) = ampl(k) * sin (2 * pi * (1:ns) / rate * freq(k))';
+    y(:, k) = ampl(k) * sin (2 * pi * (1:ns) / rate * freq(k))';
   endfor
 
 endfunction
--- a/scripts/signal/sinewave.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/signal/sinewave.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} sinewave (@var{m}, @var{n}, @var{d})
+## @deftypefn {} {@var{y} =} sinewave (@var{m}, @var{n}, @var{d})
 ## Return an @var{m}-element vector with @var{i}-th element given by
 ## @code{sin (2 * pi * (@var{i}+@var{d}-1) / @var{n})}.
 ##
@@ -33,7 +33,7 @@
 ## @seealso{sinetone}
 ## @end deftypefn
 
-function x = sinewave (m, n, d = 0)
+function y = sinewave (m, n, d = 0)
 
   if (nargin < 1)
     print_usage ();
@@ -47,7 +47,7 @@
     d = 0;
   endif
 
-  x = sin (((1 : m) + d - 1) * 2 * pi / n);
+  y = sin (((1 : m) + d - 1) * 2 * pi / n);
 
 endfunction
 
--- a/scripts/signal/spectral_adf.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/signal/spectral_adf.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,9 +24,9 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} spectral_adf (@var{c})
-## @deftypefnx {} {} spectral_adf (@var{c}, @var{win})
-## @deftypefnx {} {} spectral_adf (@var{c}, @var{win}, @var{b})
+## @deftypefn  {} {@var{sde} =} spectral_adf (@var{c})
+## @deftypefnx {} {@var{sde} =} spectral_adf (@var{c}, @var{win})
+## @deftypefnx {} {@var{sde} =} spectral_adf (@var{c}, @var{win}, @var{b})
 ## Return the spectral density estimator given a vector of autocovariances
 ## @var{c}, window name @var{win}, and bandwidth, @var{b}.
 ##
@@ -39,7 +39,7 @@
 ## @seealso{spectral_xdf}
 ## @end deftypefn
 
-function retval = spectral_adf (c, win, b)
+function sde = spectral_adf (c, win, b)
 
   if (nargin < 1)
     print_usage ();
@@ -66,9 +66,9 @@
 
   c .*= w;
 
-  retval = 2 * real (fft (c)) - c(1);
-  retval = [(zeros (cr, 1)), retval];
-  retval(:, 1) = (0 : cr-1)' / cr;
+  sde = 2 * real (fft (c)) - c(1);
+  sde = [(zeros (cr, 1)), sde];
+  sde(:, 1) = (0 : cr-1)' / cr;
 
 endfunction
 
--- a/scripts/signal/spectral_xdf.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/signal/spectral_xdf.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,9 +24,9 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} spectral_xdf (@var{x})
-## @deftypefnx {} {} spectral_xdf (@var{x}, @var{win})
-## @deftypefnx {} {} spectral_xdf (@var{x}, @var{win}, @var{b})
+## @deftypefn  {} {@var{sde} =} spectral_xdf (@var{x})
+## @deftypefnx {} {@var{sde} =} spectral_xdf (@var{x}, @var{win})
+## @deftypefnx {} {@var{sde} =} spectral_xdf (@var{x}, @var{win}, @var{b})
 ## Return the spectral density estimator given a data vector @var{x}, window
 ## name @var{win}, and bandwidth, @var{b}.
 ##
@@ -39,7 +39,7 @@
 ## @seealso{spectral_adf}
 ## @end deftypefn
 
-function retval = spectral_xdf (x, win, b)
+function sde = spectral_xdf (x, win, b)
 
   if (nargin < 1)
     print_usage ();
@@ -66,11 +66,11 @@
 
   x -= sum (x) / xr;
 
-  retval = (abs (fft (x)) / xr).^2;
-  retval = real (ifft (fft (retval) .* fft (w)));
+  sde = (abs (fft (x)) / xr).^2;
+  sde = real (ifft (fft (sde) .* fft (w)));
 
-  retval = [(zeros (xr, 1)), retval];
-  retval(:, 1) = (0 : xr-1)' / xr;
+  sde = [(zeros (xr, 1)), sde];
+  sde(:, 1) = (0 : xr-1)' / xr;
 
 endfunction
 
--- a/scripts/signal/spencer.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/signal/spencer.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,14 +24,14 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} spencer (@var{x})
+## @deftypefn {} {@var{savg} =} spencer (@var{x})
 ## Return @nospell{Spencer's} 15-point moving average of each column of
 ## @var{x}.
 ## @end deftypefn
 
-function retval = spencer (x)
+function savg = spencer (x)
 
-  if (nargin < 1)
+  if (nargin != 1)
     print_usage ();
   endif
 
@@ -48,9 +48,9 @@
 
   w = [-3, -6, -5, 3, 21, 46, 67, 74, 67, 46, 21, 3, -5, -6, -3] / 320;
 
-  retval = fftfilt (w, x);
-  retval = [zeros(7,c); retval(15:n,:); zeros(7,c);];
+  savg = fftfilt (w, x);
+  savg = [zeros(7,c); savg(15:n,:); zeros(7,c);];
 
-  retval = reshape (retval, xr, xc);
+  savg = reshape (savg, xr, xc);
 
 endfunction
--- a/scripts/sparse/bicg.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/sparse/bicg.m	Mon Aug 29 13:58:00 2022 +0200
@@ -43,9 +43,9 @@
 ##
 ## @item @var{A} is the matrix of the linear system and it must be square.
 ## @var{A} can be passed as a matrix, function handle, or inline function
-## @code{Afun} such that @w{@code{Afun (x, "notransp") = A * x}} and
-## @w{@code{Afun (x, "transp") = A' * x}}.  Additional parameters to
-## @code{Afun} may be passed after @var{x0}.
+## @code{Afcn} such that @w{@code{Afcn (x, "notransp") = A * x}} and
+## @w{@code{Afcn (x, "transp") = A' * x}}.  Additional parameters to
+## @code{Afcn} may be passed after @var{x0}.
 ##
 ## @item @var{b} is the right-hand side vector.  It must be a column vector
 ## with the same number of rows as @var{A}.
@@ -84,7 +84,7 @@
 ## @end itemize
 ##
 ## Any arguments which follow @var{x0} are treated as parameters, and passed in
-## an appropriate manner to any of the functions (@var{Afun} or @var{Mfun}) or
+## an appropriate manner to any of the functions (@var{Afcn} or @var{Mfcn}) or
 ## that have been given to @code{bicg}.
 ##
 ## The output parameters are:
@@ -140,13 +140,13 @@
 ## restart = 5;
 ## [M1, M2] = ilu (A);  # in this tridiag case, it corresponds to lu (A)
 ## M = M1 * M2;
-## Afun = @@(x, string) strcmp (string, "notransp") * (A * x) + ...
+## Afcn = @@(x, string) strcmp (string, "notransp") * (A * x) + ...
 ##                      strcmp (string, "transp") * (A' * x);
-## Mfun = @@(x, string) strcmp (string, "notransp") * (M \ x) + ...
+## Mfcn = @@(x, string) strcmp (string, "notransp") * (M \ x) + ...
 ##                      strcmp (string, "transp") * (M' \ x);
-## M1fun = @@(x, string) strcmp (string, "notransp") * (M1 \ x) + ...
+## M1fcn = @@(x, string) strcmp (string, "notransp") * (M1 \ x) + ...
 ##                      strcmp (string, "transp") * (M1' \ x);
-## M2fun = @@(x, string) strcmp (string, "notransp") * (M2 \ x) + ...
+## M2fcn = @@(x, string) strcmp (string, "notransp") * (M2 \ x) + ...
 ##                      strcmp (string, "transp") * (M2' \ x);
 ## @end group
 ## @end example
@@ -161,7 +161,7 @@
 ## @code{@var{A}*@var{x}} and @code{@var{A'}*@var{x}}
 ##
 ## @example
-## x = bicg (Afun, b, [], n)
+## x = bicg (Afcn, b, [], n)
 ## @end example
 ##
 ## @sc{Example 3:} @code{bicg} with a preconditioner matrix @var{M}
@@ -173,7 +173,7 @@
 ## @sc{Example 4:} @code{bicg} with a function as preconditioner
 ##
 ## @example
-## x = bicg (Afun, b, 1e-6, n, Mfun)
+## x = bicg (Afcn, b, 1e-6, n, Mfcn)
 ## @end example
 ##
 ## @sc{Example 5:} @code{bicg} with preconditioner matrices @var{M1}
@@ -186,7 +186,7 @@
 ## @sc{Example 6:} @code{bicg} with functions as preconditioners
 ##
 ## @example
-## x = bicg (Afun, b, 1e-6, n, M1fun, M2fun)
+## x = bicg (Afcn, b, 1e-6, n, M1fcn, M2fcn)
 ## @end example
 ##
 ## @sc{Example 7:} @code{bicg} with as input a function requiring an argument
@@ -207,8 +207,8 @@
 ##   endif
 ## endfunction
 ##
-## Apfun = @@(x, string, p) Ap (A, x, string, p);
-## x = bicg (Apfun, b, [], [], [], [], [], 2);
+## Apfcn = @@(x, string, p) Ap (A, x, string, p);
+## x = bicg (Apfcn, b, [], [], [], [], [], 2);
 ## @end group
 ## @end example
 ##
@@ -223,7 +223,7 @@
 function [x_min, flag, relres, iter_min, resvec] = ...
          bicg (A, b, tol = [], maxit = [], M1 = [], M2 = [], x0 = [], varargin)
 
-  [Afun, M1fun, M2fun] =  __alltohandles__ (A, b, M1, M2, "bicg");
+  [Afcn, M1fcn, M2fcn] =  __alltohandles__ (A, b, M1, M2, "bicg");
 
   [tol, maxit, x0] = __default__input__ ({1e-06, min(rows(b), 20), ...
                                           zeros(rows (b),1)}, tol, maxit, x0);
@@ -253,17 +253,17 @@
   iter = iter_min = 0;
   flag = 1;  # Default flag is "maximum number of iterations reached"
   resvec = zeros (maxit + 1, 1);
-  r0 = b - Afun (x, "notransp", varargin{:});  # Residual of the system
-  s0 = c - Afun (x, "transp", varargin{:});    # Res. of the "dual system"
+  r0 = b - Afcn (x, "notransp", varargin{:});  # Residual of the system
+  s0 = c - Afcn (x, "transp", varargin{:});    # Res. of the "dual system"
   resvec(1) = norm (r0, 2);
 
   try
     warning ("error", "Octave:singular-matrix", "local");
-    prec_r0 = M1fun (r0, "notransp", varargin{:});  # r0 preconditioned
+    prec_r0 = M1fcn (r0, "notransp", varargin{:});  # r0 preconditioned
     prec_s0 = s0;
-    prec_r0 = M2fun (prec_r0, "notransp", varargin{:});
-    prec_s0 = M2fun (prec_s0, "transp", varargin{:});
-    prec_s0 = M1fun (prec_s0, "transp", varargin{:});  # s0 preconditioned
+    prec_r0 = M2fcn (prec_r0, "notransp", varargin{:});
+    prec_s0 = M2fcn (prec_s0, "transp", varargin{:});
+    prec_s0 = M1fcn (prec_s0, "transp", varargin{:});  # s0 preconditioned
     p = prec_r0;  # Direction of the system
     q = prec_s0;  # Direction of the "dual system"
   catch
@@ -271,7 +271,7 @@
   end_try_catch
 
   while ((flag != 2) && (iter < maxit) && (resvec(iter+1) >= norm_b * tol))
-    v = Afun (p, "notransp", varargin{:});
+    v = Afcn (p, "notransp", varargin{:});
     prod_qv = q' * v;
     alpha = (s0' * prec_r0);
     if (abs (prod_qv) <= eps * abs (alpha))
@@ -282,18 +282,18 @@
     x += alpha * p;
     prod_rs = (s0' * prec_r0);  # Product between r0 and s0
     r0 -= alpha * v;
-    s0 -= conj (alpha) * Afun (q, "transp", varargin{:});
-    prec_r0 = M1fun (r0, "notransp", varargin{:});
+    s0 -= conj (alpha) * Afcn (q, "transp", varargin{:});
+    prec_r0 = M1fcn (r0, "notransp", varargin{:});
     prec_s0 = s0;
-    prec_r0 = M2fun (prec_r0, "notransp", varargin{:});
+    prec_r0 = M2fcn (prec_r0, "notransp", varargin{:});
     beta = s0' * prec_r0;
     if (abs (prod_rs) <= abs (beta))
       flag = 4;
       break;
     endif
     beta ./= prod_rs;
-    prec_s0 = M2fun (prec_s0, "transp", varargin{:});
-    prec_s0 = M1fun (prec_s0, "transp", varargin{:});
+    prec_s0 = M2fcn (prec_s0, "transp", varargin{:});
+    prec_s0 = M1fcn (prec_s0, "transp", varargin{:});
     iter += 1;
     resvec(iter+1) = norm (r0);
     if (resvec(iter+1) <= resvec(iter_min+1))
@@ -378,11 +378,11 @@
 %!   endif
 %! endfunction
 %!
-%! Afun = @(x, string) Ap (A, x, string, 1);
-%! x = bicg (Afun, b, [], n);
+%! Afcn = @(x, string) Ap (A, x, string, 1);
+%! x = bicg (Afcn, b, [], n);
 %! x = bicg (A, b, 1e-6, n, M);
 %! x = bicg (A, b, 1e-6, n, M1, M2);
-%! function y = Mfun (M, x, string)
+%! function y = Mfcn (M, x, string)
 %!   if (strcmp (string, "notransp"))
 %!     y = M \ x;
 %!   else
@@ -390,14 +390,14 @@
 %!   endif
 %! endfunction
 %!
-%! M1fun = @(x, string) Mfun (M, x, string);
-%! x = bicg (Afun, b, 1e-6, n, M1fun);
-%! M1fun = @(x, string) Mfun (M1, x, string);
-%! M2fun = @(x, string) Mfun (M2, x, string);
-%! x = bicg (Afun, b, 1e-6, n, M1fun, M2fun);
-%! Afun = @(x, string, p) Ap (A, x, string, p);
+%! M1fcn = @(x, string) Mfcn (M, x, string);
+%! x = bicg (Afcn, b, 1e-6, n, M1fcn);
+%! M1fcn = @(x, string) Mfcn (M1, x, string);
+%! M2fcn = @(x, string) Mfcn (M2, x, string);
+%! x = bicg (Afcn, b, 1e-6, n, M1fcn, M2fcn);
+%! Afcn = @(x, string, p) Ap (A, x, string, p);
 %! ## Solution of A^2 * x = b
-%! x = bicg (Afun, b, [], 2*n, [], [], [], 2);
+%! x = bicg (Afcn, b, [], 2*n, [], [], [], 2);
 
 %!test
 %! ## Check that all type of inputs work
@@ -405,31 +405,31 @@
 %! b = A * ones (5, 1);
 %! M1 = diag (sqrt (diag (A)));
 %! M2 = M1;
-%! Afun = @(z, string) strcmp (string, "notransp") * (A * z) + ...
+%! Afcn = @(z, string) strcmp (string, "notransp") * (A * z) + ...
 %!                     strcmp (string, "transp") * (A' * z);
-%! M1_fun = @(z, string) strcmp (string,"notransp") * (M1 \ z) + ...
+%! M1_fcn = @(z, string) strcmp (string,"notransp") * (M1 \ z) + ...
 %!                         strcmp (string, "transp") * (M1' \ z);
-%! M2_fun = @(z, string) strcmp (string, "notransp") * (M2 \ z) + ...
+%! M2_fcn = @(z, string) strcmp (string, "notransp") * (M2 \ z) + ...
 %!                         strcmp (string, "transp") * (M2' \ z);
 %! [x, flag] = bicg (A, b);
 %! assert (flag, 0);
 %! [x, flag] = bicg (A, b, [], [], M1, M2);
 %! assert (flag, 0);
-%! [x, flag] = bicg (A, b, [], [], M1_fun, M2_fun);
+%! [x, flag] = bicg (A, b, [], [], M1_fcn, M2_fcn);
 %! assert (flag, 0);
-%! [x, flag] = bicg (A, b,[], [], M1_fun, M2);
+%! [x, flag] = bicg (A, b,[], [], M1_fcn, M2);
 %! assert (flag, 0);
-%! [x, flag] = bicg (A, b,[], [], M1, M2_fun);
+%! [x, flag] = bicg (A, b,[], [], M1, M2_fcn);
 %! assert (flag, 0);
-%! [x, flag] = bicg (Afun, b);
+%! [x, flag] = bicg (Afcn, b);
 %! assert (flag, 0);
-%! [x, flag] = bicg (Afun, b,[], [], M1, M2);
+%! [x, flag] = bicg (Afcn, b,[], [], M1, M2);
 %! assert (flag, 0);
-%! [x, flag] = bicg (Afun, b,[], [], M1_fun, M2);
+%! [x, flag] = bicg (Afcn, b,[], [], M1_fcn, M2);
 %! assert (flag, 0);
-%! [x, flag] = bicg (Afun, b,[], [], M1, M2_fun);
+%! [x, flag] = bicg (Afcn, b,[], [], M1, M2_fcn);
 %! assert (flag, 0);
-%! [x, flag] = bicg (Afun, b,[], [], M1_fun, M2_fun);
+%! [x, flag] = bicg (Afcn, b,[], [], M1_fcn, M2_fcn);
 %! assert (flag, 0);
 
 %!test
@@ -443,7 +443,7 @@
 %! [x, flag, relres, iter, resvec] = bicg (A, b, tol, maxit, M1, M2);
 %! assert (norm (b - A*x) / norm (b), 0, tol);
 
-%!function y = afun (x, t, a)
+%!function y = afcn (x, t, a)
 %!  switch (t)
 %!    case "notransp"
 %!      y = a * x;
@@ -461,7 +461,7 @@
 %! M1 = spdiags ([ones(n,1)/(-2) ones(n,1)],-1:0, n, n);
 %! M2 = spdiags ([4*ones(n,1) -ones(n,1)], 0:1, n, n);
 %!
-%! [x, flag, relres, iter, resvec] = bicg (@(x, t) afun (x, t, A),
+%! [x, flag, relres, iter, resvec] = bicg (@(x, t) afcn (x, t, A),
 %!                                         b, tol, maxit, M1, M2);
 %! assert (x, ones (size (b)), 1e-7);
 
@@ -516,7 +516,7 @@
 %! assert (class (x), "single");
 
 %!test
-%!function y = Afun (x, trans)
+%!function y = Afcn (x, trans)
 %!  A = sparse (toeplitz ([2, 1, 0, 0], [2, -1, 0, 0]));
 %!  if (strcmp (trans, "notransp"))
 %!     y = A * x;
@@ -525,7 +525,7 @@
 %!  endif
 %!endfunction
 %!
-%! [x, flag] = bicg ("Afun", [1; 2; 2; 3]);
+%! [x, flag] = bicg ("Afcn", [1; 2; 2; 3]);
 %! assert (x, ones (4, 1), 1e-6);
 
 %!test
--- a/scripts/sparse/bicgstab.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/sparse/bicgstab.m	Mon Aug 29 13:58:00 2022 +0200
@@ -36,8 +36,8 @@
 ##
 ## @item @var{A} is the matrix of the linear system and it must be square.
 ## @var{A} can be passed as a matrix, function handle, or inline
-## function @code{Afun} such that @code{Afun(x) = A * x}.  Additional
-## parameters to @code{Afun} are passed after @var{x0}.
+## function @code{Afcn} such that @code{Afcn(x) = A * x}.  Additional
+## parameters to @code{Afcn} are passed after @var{x0}.
 ##
 ## @item @var{b} is the right hand side vector.  It must be a column vector
 ## with the same number of rows as @var{A}.
@@ -118,10 +118,10 @@
 ## restart = 5;
 ## [M1, M2] = ilu (A); # in this tridiag case, it corresponds to lu (A)
 ## M = M1 * M2;
-## Afun = @@(x) A * x;
-## Mfun = @@(x) M \ x;
-## M1fun = @@(x) M1 \ x;
-## M2fun = @@(x) M2 \ x;
+## Afcn = @@(x) A * x;
+## Mfcn = @@(x) M \ x;
+## M1fcn = @@(x) M1 \ x;
+## M2fcn = @@(x) M2 \ x;
 ## @end group
 ## @end example
 ##
@@ -135,7 +135,7 @@
 ## @code{@var{A} * @var{x}}
 ##
 ## @example
-## x = bicgstab (Afun, b, [], n)
+## x = bicgstab (Afcn, b, [], n)
 ## @end example
 ##
 ## @sc{Example 3:} @code{bicgstab} with a preconditioner matrix @var{M}
@@ -147,7 +147,7 @@
 ## @sc{Example 4:} @code{bicgstab} with a function as preconditioner
 ##
 ## @example
-## x = bicgstab (Afun, b, 1e-6, n, Mfun)
+## x = bicgstab (Afcn, b, 1e-6, n, Mfcn)
 ## @end example
 ##
 ## @sc{Example 5:} @code{bicgstab} with preconditioner matrices @var{M1}
@@ -160,7 +160,7 @@
 ## @sc{Example 6:} @code{bicgstab} with functions as preconditioners
 ##
 ## @example
-## x = bicgstab (Afun, b, 1e-6, n, M1fun, M2fun)
+## x = bicgstab (Afcn, b, 1e-6, n, M1fcn, M2fcn)
 ## @end example
 ##
 ## @sc{Example 7:} @code{bicgstab} with as input a function requiring
@@ -174,8 +174,8 @@
 ##      y = A * y;
 ##    endfor
 ##  endfunction
-## Apfun = @@(x, string, p) Ap (A, x, string, p);
-## x = bicgstab (Apfun, b, [], [], [], [], [], 2);
+## Apfcn = @@(x, string, p) Ap (A, x, string, p);
+## x = bicgstab (Apfcn, b, [], [], [], [], [], 2);
 ## @end group
 ## @end example
 ##
@@ -211,7 +211,7 @@
                    x0 = [], varargin)
 
   ## Check consistency and  type of A, M1, M2
-  [Afun, M1fun, M2fun] =  __alltohandles__ (A, b, M1, M2, "bicgstab");
+  [Afcn, M1fcn, M2fcn] =  __alltohandles__ (A, b, M1, M2, "bicgstab");
 
   ## Check if input tol are empty (set them to default if necessary)
   [tol, maxit, x0] = __default__input__ ({1e-06, min(rows(b), 20), ...
@@ -240,7 +240,7 @@
   ## default setting of flag is 1 (i.e. max number of iterations reached)
   flag = 1;
 
-  res = b - feval (Afun, x, varargin{:});
+  res = b - feval (Afcn, x, varargin{:});
   rr = p = res; # rr is r_star
   rho_1 = rr' * res;
   resvec (1) = norm (res,2);
@@ -249,14 +249,14 @@
   ## To check if the preconditioners are singular or they have some NaN
   try
     warning ("error", "Octave:singular-matrix", "local");
-    p_hat = feval (M1fun, p, varargin{:});
-    p_hat = feval (M2fun, p_hat, varargin{:});
+    p_hat = feval (M1fcn, p, varargin{:});
+    p_hat = feval (M2fcn, p_hat, varargin{:});
   catch
     flag = 2;
   end_try_catch
 
   while (flag !=2) && (iter < d_maxit) && (resvec (iter + 1) >= real_tol)
-    v = feval (Afun, p_hat, varargin{:});
+    v = feval (Afcn, p_hat, varargin{:});
     prod_tmp = (rr' * v);
     if (prod_tmp == 0)
       flag = 4;
@@ -275,9 +275,9 @@
       x_min = x;
       iter_min = iter;
     endif
-    s_hat = feval (M1fun, s, varargin{:});
-    s_hat = feval (M2fun, s_hat, varargin{:});
-    t = feval (Afun, s_hat, varargin{:});
+    s_hat = feval (M1fcn, s, varargin{:});
+    s_hat = feval (M2fcn, s_hat, varargin{:});
+    t = feval (Afcn, s_hat, varargin{:});
     omega = (t' * s) / (t' * t);
     if (omega == 0) # x and residual don't change and the next it will be NaN
       flag = 4;
@@ -304,8 +304,8 @@
     endif
     beta = (rho_1 / rho_2) * (alpha / omega);
     p = res + beta * (p - omega*  v);
-    p_hat = feval (M1fun, p, varargin{:});
-    p_hat = feval (M2fun, p_hat, varargin{:});
+    p_hat = feval (M1fcn, p, varargin{:});
+    p_hat = feval (M2fcn, p_hat, varargin{:});
   endwhile
   resvec = resvec (1:iter+1,1);
 
@@ -362,15 +362,15 @@
 %! [M1, M2] = ilu (A + 0.1 * eye (n));
 %! M = M1 * M2;
 %! x = bicgstab (A, b, [], n);
-%! Afun = @(x) A * x;
-%! x = bicgstab (Afun, b, [], n);
+%! Afcn = @(x) A * x;
+%! x = bicgstab (Afcn, b, [], n);
 %! x = bicgstab (A, b, 1e-6, n, M);
 %! x = bicgstab (A, b, 1e-6, n, M1, M2);
-%! Mfun = @(z) M \ z;
-%! x = bicgstab (Afun, b, 1e-6, n, Mfun);
-%! M1fun = @(z) M1 \ z;
-%! M2fun = @(z) M2 \ z;
-%! x = bicgstab (Afun, b, 1e-6, n, M1fun, M2fun);
+%! Mfcn = @(z) M \ z;
+%! x = bicgstab (Afcn, b, 1e-6, n, Mfcn);
+%! M1fcn = @(z) M1 \ z;
+%! M2fcn = @(z) M2 \ z;
+%! x = bicgstab (Afcn, b, 1e-6, n, M1fcn, M2fcn);
 %! function y = Ap (A, x, z)
 %!   ## compute A^z * x or (A^z)' * x
 %!   y = x;
@@ -378,8 +378,8 @@
 %!     y = A * y;
 %!   endfor
 %! endfunction
-%! Afun = @(x, p) Ap (A, x, p);
-%! x = bicgstab (Afun, b, [], 2 * n, [], [], [], 2); # solution of A^2 * x = b
+%! Afcn = @(x, p) Ap (A, x, p);
+%! x = bicgstab (Afcn, b, [], 2 * n, [], [], [], 2); # solution of A^2 * x = b
 
 %!demo
 %! n = 10;
@@ -406,28 +406,28 @@
 %! M1 = diag (sqrt (diag (A)));
 %! M2 = M1;
 %! maxit = 20;
-%! Afun = @(z) A*z;
-%! M1_fun = @(z) M1 \ z;
-%! M2_fun = @(z) M2 \ z;
+%! Afcn = @(z) A*z;
+%! M1_fcn = @(z) M1 \ z;
+%! M2_fcn = @(z) M2 \ z;
 %! [x, flag] = bicgstab (A,b );
 %! assert (flag, 0);
 %! [x, flag] = bicgstab (A, b, [], maxit, M1, M2);
 %! assert (flag, 0);
-%! [x, flag] = bicgstab (A, b, [], maxit, M1_fun, M2_fun);
+%! [x, flag] = bicgstab (A, b, [], maxit, M1_fcn, M2_fcn);
 %! assert (flag, 0);
-%! [x, flag] = bicgstab (A, b, [], maxit, M1_fun, M2);
+%! [x, flag] = bicgstab (A, b, [], maxit, M1_fcn, M2);
 %! assert (flag, 0);
-%! [x, flag] = bicgstab (A, b, [], maxit, M1, M2_fun);
+%! [x, flag] = bicgstab (A, b, [], maxit, M1, M2_fcn);
 %! assert (flag, 0);
-%! [x, flag] = bicgstab (Afun, b);
+%! [x, flag] = bicgstab (Afcn, b);
 %! assert (flag, 0);
-%! [x, flag] = bicgstab (Afun, b, [], maxit, M1, M2);
+%! [x, flag] = bicgstab (Afcn, b, [], maxit, M1, M2);
 %! assert (flag, 0);
-%! [x, flag] = bicgstab (Afun, b, [], maxit, M1_fun, M2);
+%! [x, flag] = bicgstab (Afcn, b, [], maxit, M1_fcn, M2);
 %! assert (flag, 0);
-%! [x, flag] = bicgstab (Afun, b, [], maxit, M1, M2_fun);
+%! [x, flag] = bicgstab (Afcn, b, [], maxit, M1, M2_fcn);
 %! assert (flag, 0);
-%! [x, flag] = bicgstab (Afun, b, [], maxit, M1_fun, M2_fun);
+%! [x, flag] = bicgstab (Afcn, b, [], maxit, M1_fcn, M2_fcn);
 %! assert (flag, 0);
 
 %!shared n, A, b, tol, maxit, M1, M2
@@ -443,12 +443,12 @@
 %! [x, flag, relres, iter, resvec] = bicgstab (A, b, tol, maxit, M1, M2);
 %! assert (norm (b - A*x) / norm (b), 0, tol);
 
-%!function y = afun (x, a)
+%!function y = afcn (x, a)
 %!  y = a * x;
 %!endfunction
 %!
 %!test
-%! [x, flag, relres, iter, resvec] = bicgstab (@(x) afun (x, A), b,
+%! [x, flag, relres, iter, resvec] = bicgstab (@(x) afcn (x, A), b,
 %!                                             tol, maxit, M1, M2);
 %! assert (norm (b - A*x) / norm (b), 0, tol);
 
@@ -501,13 +501,13 @@
 %! assert (class (x), "single");
 
 %!test
-%!function y = Afun (x)
+%!function y = Afcn (x)
 %!  A = sparse (toeplitz ([2, 1, 0, 0], [2, -1, 0, 0]));
 %!  y = A * x;
 %!endfunction
 %!
 %! b = [1; 2; 2; 3];
-%! [x, flag] = bicgstab ("Afun", b);
+%! [x, flag] = bicgstab ("Afcn", b);
 %! assert (norm (b - A*x) / norm (b), 0, 1e-6);
 
 %!test
--- a/scripts/sparse/cgs.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/sparse/cgs.m	Mon Aug 29 13:58:00 2022 +0200
@@ -36,8 +36,8 @@
 ##
 ## @item @var{A} is the matrix of the linear system and it must be square.
 ## @var{A} can be passed as a matrix, function handle, or inline
-## function @code{Afun} such that @code{Afun(x) = A * x}.  Additional
-## parameters to @code{Afun} are passed after @var{x0}.
+## function @code{Afcn} such that @code{Afcn(x) = A * x}.  Additional
+## parameters to @code{Afcn} are passed after @var{x0}.
 ##
 ## @item @var{b} is the right hand side vector.  It must be a column vector
 ## with same number of rows of @var{A}.
@@ -107,10 +107,10 @@
 ## restart = 5;
 ## [M1, M2] = ilu (A); # in this tridiag case it corresponds to chol (A)'
 ## M = M1 * M2;
-## Afun = @@(x) A * x;
-## Mfun = @@(x) M \ x;
-## M1fun = @@(x) M1 \ x;
-## M2fun = @@(x) M2 \ x;
+## Afcn = @@(x) A * x;
+## Mfcn = @@(x) M \ x;
+## M1fcn = @@(x) M1 \ x;
+## M2fcn = @@(x) M2 \ x;
 ## @end group
 ## @end example
 ##
@@ -124,7 +124,7 @@
 ## @code{@var{A} * @var{x}}
 ##
 ## @example
-## x = cgs (Afun, b, [], n)
+## x = cgs (Afcn, b, [], n)
 ## @end example
 ##
 ## @sc{Example 3:} @code{cgs} with a preconditioner matrix @var{M}
@@ -136,7 +136,7 @@
 ## @sc{Example 4:} @code{cgs} with a function as preconditioner
 ##
 ## @example
-## x = cgs (Afun, b, 1e-6, n, Mfun)
+## x = cgs (Afcn, b, 1e-6, n, Mfcn)
 ## @end example
 ##
 ## @sc{Example 5:} @code{cgs} with preconditioner matrices @var{M1}
@@ -149,7 +149,7 @@
 ## @sc{Example 6:} @code{cgs} with functions as preconditioners
 ##
 ## @example
-## x = cgs (Afun, b, 1e-6, n, M1fun, M2fun)
+## x = cgs (Afcn, b, 1e-6, n, M1fcn, M2fcn)
 ## @end example
 ##
 ## @sc{Example 7:} @code{cgs} with as input a function requiring an argument
@@ -162,8 +162,8 @@
 ##      y = A * y;
 ##    endfor
 ##  endfunction
-## Apfun = @@(x, string, p) Ap (A, x, string, p);
-## x = cgs (Apfun, b, [], [], [], [], [], 2);
+## Apfcn = @@(x, string, p) Ap (A, x, string, p);
+## x = cgs (Apfcn, b, [], [], [], [], [], 2);
 ## @end group
 ## @end example
 ##
@@ -196,7 +196,7 @@
 function [x_min, flag, relres, iter_min, resvec] = ...
          cgs (A, b, tol = [], maxit = [], M1 = [] , M2 = [], x0 = [], varargin)
 
-  [Afun, M1fun, M2fun] = __alltohandles__ (A, b, M1, M2, "cgs");
+  [Afcn, M1fcn, M2fcn] = __alltohandles__ (A, b, M1, M2, "cgs");
 
   [tol, maxit, x0] = __default__input__ ({1e-06, min( rows(b), 20), ...
                                           zeros(size (b))}, tol, maxit, x0);
@@ -224,21 +224,21 @@
   ## x_min approximation with the minimum residual
   ## x_pr approximation at the previous iteration (to check stagnation)
 
-  r0 = rr = u = p = b - feval (Afun, x, varargin{:});
+  r0 = rr = u = p = b - feval (Afcn, x, varargin{:});
   resvec (1) = norm (r0, 2);
   rho_1 = rr' * r0;
 
   try
     warning ("error","Octave:singular-matrix","local");
-    p_hat = feval (M1fun, p, varargin{:});
-    p_hat = feval (M2fun, p_hat, varargin {:});
+    p_hat = feval (M1fcn, p, varargin{:});
+    p_hat = feval (M2fcn, p_hat, varargin {:});
   catch
     flag = 2;
   end_try_catch
 
   while ((flag != 2) && (iter < maxit) && ...
          (resvec (iter + 1) >= tol * norm_b))
-    v = feval (Afun, p_hat, varargin{:});
+    v = feval (Afcn, p_hat, varargin{:});
     prod_tmp = (rr' * v);
     if (prod_tmp == 0)
       flag = 4;
@@ -246,10 +246,10 @@
     endif
     alpha = rho_1 / prod_tmp;
     q = u - alpha * v;
-    u_hat = feval(M1fun, u + q, varargin{:});
-    u_hat = feval (M2fun, u_hat, varargin{:});
+    u_hat = feval(M1fcn, u + q, varargin{:});
+    u_hat = feval (M2fcn, u_hat, varargin{:});
     x += alpha*u_hat;
-    r0 -= alpha* feval (Afun, u_hat, varargin{:});
+    r0 -= alpha* feval (Afcn, u_hat, varargin{:});
     iter += 1;
     resvec (iter + 1) = norm (r0, 2);
     if (norm (x - x_pr, 2) <= norm (x, 2) * eps) # Stagnation
@@ -270,8 +270,8 @@
     beta = rho_1 / rho_2;
     u = r0 + beta * q;
     p = u + beta * (q + beta * p);
-    p_hat = feval (M1fun, p, varargin {:});
-    p_hat = feval (M2fun, p_hat, varargin{:});
+    p_hat = feval (M1fcn, p, varargin {:});
+    p_hat = feval (M2fcn, p_hat, varargin{:});
   endwhile
   resvec = resvec (1: (iter + 1));
 
@@ -331,15 +331,15 @@
 %! [M1, M2] = ilu (A + 0.1 * eye (n));
 %! M = M1 * M2;
 %! x = cgs (A, b, [], n);
-%! Afun = @(x) A * x;
-%! x = cgs (Afun, b, [], n);
+%! Afcn = @(x) A * x;
+%! x = cgs (Afcn, b, [], n);
 %! x = cgs (A, b, 1e-6, n, M);
 %! x = cgs (A, b, 1e-6, n, M1, M2);
-%! Mfun = @(z) M \ z;
-%! x = cgs (Afun, b, 1e-6, n, Mfun);
-%! M1fun = @(z) M1 \ z;
-%! M2fun = @(z) M2 \ z;
-%! x = cgs (Afun, b, 1e-6, n, M1fun, M2fun);
+%! Mfcn = @(z) M \ z;
+%! x = cgs (Afcn, b, 1e-6, n, Mfcn);
+%! M1fcn = @(z) M1 \ z;
+%! M2fcn = @(z) M2 \ z;
+%! x = cgs (Afcn, b, 1e-6, n, M1fcn, M2fcn);
 %! function y = Ap (A, x, z)
 %!   ## compute A^z * x or (A^z)' * x
 %!   y = x;
@@ -347,8 +347,8 @@
 %!     y = A * y;
 %!   endfor
 %! endfunction
-%! Afun = @(x, p) Ap (A, x, p);
-%! x = cgs (Afun, b, [], 2*n, [], [], [], 2); # solution of A^2 * x = b
+%! Afcn = @(x, p) Ap (A, x, p);
+%! x = cgs (Afcn, b, [], 2*n, [], [], [], 2); # solution of A^2 * x = b
 
 %!demo
 %! n = 10;
@@ -375,28 +375,28 @@
 %! M1 = diag (sqrt (diag (A)));
 %! M2 = M1;
 %! maxit = 10;
-%! Afun = @(z) A * z;
-%! M1_fun = @(z) M1 \ z;
-%! M2_fun = @(z) M2 \ z;
+%! Afcn = @(z) A * z;
+%! M1_fcn = @(z) M1 \ z;
+%! M2_fcn = @(z) M2 \ z;
 %! [x, flag] = cgs (A,b);
 %! assert (flag, 0);
 %! [x, flag] = cgs (A, b, [], maxit, M1, M2);
 %! assert (flag, 0);
-%! [x, flag] = cgs (A, b, [], maxit, M1_fun, M2_fun);
+%! [x, flag] = cgs (A, b, [], maxit, M1_fcn, M2_fcn);
 %! assert (flag, 0);
-%! [x, flag] = cgs (A, b, [], maxit, M1_fun, M2);
+%! [x, flag] = cgs (A, b, [], maxit, M1_fcn, M2);
 %! assert (flag, 0);
-%! [x, flag] = cgs (A, b, [], maxit, M1, M2_fun);
+%! [x, flag] = cgs (A, b, [], maxit, M1, M2_fcn);
 %! assert (flag, 0);
-%! [x, flag] = cgs (Afun, b);
+%! [x, flag] = cgs (Afcn, b);
 %! assert (flag, 0);
-%! [x, flag] = cgs (Afun, b, [], maxit, M1, M2);
+%! [x, flag] = cgs (Afcn, b, [], maxit, M1, M2);
 %! assert (flag, 0);
-%! [x, flag] = cgs (Afun, b, [], maxit, M1_fun, M2);
+%! [x, flag] = cgs (Afcn, b, [], maxit, M1_fcn, M2);
 %! assert (flag, 0);
-%! [x, flag] = cgs (Afun, b, [], maxit, M1, M2_fun);
+%! [x, flag] = cgs (Afcn, b, [], maxit, M1, M2_fcn);
 %! assert (flag, 0);
-%! [x, flag] = cgs (Afun, b, [], maxit, M1_fun, M2_fun);
+%! [x, flag] = cgs (Afcn, b, [], maxit, M1_fcn, M2_fcn);
 %! assert (flag, 0);
 
 %!shared n, A, b, tol, maxit, M
@@ -451,11 +451,11 @@
 %! assert (class (x), "single");
 
 %!test
-%!function y = Afun (x)
+%!function y = Afcn (x)
 %!  A = toeplitz ([2, 1, 0, 0], [2, -1, 0, 0]);
 %!  y = A * x;
 %!endfunction
-%! [x, flag] = cgs ("Afun", [1; 2; 2; 3]);
+%! [x, flag] = cgs ("Afcn", [1; 2; 2; 3]);
 %! assert (norm (b - A*x) / norm (b), 0, 1e-6);
 
 %!test
--- a/scripts/sparse/eigs.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/sparse/eigs.m	Mon Aug 29 13:58:00 2022 +0200
@@ -534,25 +534,25 @@
 %!testif HAVE_ARPACK, HAVE_UMFPACK
 %! assert (eigs (A, k, 4.1), eigs (A, speye (n), k, 4.1), 1e-11);
 %!testif HAVE_ARPACK
-%! fn = @(x) A * x;
+%! fcn = @(x) A * x;
 %! opts.issym = 1;  opts.isreal = 1;
-%! d1 = eigs (fn, n, k, "lm", opts);
+%! d1 = eigs (fcn, n, k, "lm", opts);
 %! assert (d1, d0(end:-1:(end-k+1)), 1e-11);
 %!testif HAVE_ARPACK
-%! fn = @(x) A \ x;
+%! fcn = @(x) A \ x;
 %! opts.issym = 1;  opts.isreal = 1;
-%! d1 = eigs (fn, n, k, "sm", opts);
+%! d1 = eigs (fcn, n, k, "sm", opts);
 %! assert (d1, d0(k:-1:1), 1e-11);
 %!testif HAVE_ARPACK, HAVE_UMFPACK
-%! fn = @(x) (A - 4.1 * eye (n)) \ x;
+%! fcn = @(x) (A - 4.1 * eye (n)) \ x;
 %! opts.issym = 1;  opts.isreal = 1;
-%! d1 = eigs (fn, n, k, 4.1, opts);
+%! d1 = eigs (fcn, n, k, 4.1, opts);
 %! assert (d1, eigs (A, k, 4.1), 1e-11);
 %!testif HAVE_ARPACK, HAVE_UMFPACK, HAVE_CHOLMOD
 %! AA = speye (10);
-%! fn = @(x) AA * x;
+%! fcn = @(x) AA * x;
 %! opts.issym = 1;  opts.isreal = 1;
-%! assert (eigs (fn, 10, AA, 3, "lm", opts), [1; 1; 1], 10*eps);
+%! assert (eigs (fcn, 10, AA, 3, "lm", opts), [1; 1; 1], 10*eps);
 %!testif HAVE_ARPACK
 %! [v1,d1] = eigs (A, k, "lm");
 %! d1 = diag (d1);
@@ -662,19 +662,19 @@
 %! assert (sort (imag (eigs (A, k, 4.1))),
 %!         sort (imag (eigs (A, speye (n), k, 4.1))), 1e-11);
 %!testif HAVE_ARPACK
-%! fn = @(x) A * x;
+%! fcn = @(x) A * x;
 %! opts.issym = 0;  opts.isreal = 1;
-%! d1 = eigs (fn, n, k, "lm", opts);
+%! d1 = eigs (fcn, n, k, "lm", opts);
 %! assert (abs (d1), abs (d0(end:-1:(end-k+1))), 1e-11);
 %!testif HAVE_ARPACK
-%! fn = @(x) A \ x;
+%! fcn = @(x) A \ x;
 %! opts.issym = 0;  opts.isreal = 1;
-%! d1 = eigs (fn, n, k, "sm", opts);
+%! d1 = eigs (fcn, n, k, "sm", opts);
 %! assert (abs (d1), d0(1:k), 1e-11);
 %!testif HAVE_ARPACK, HAVE_UMFPACK
-%! fn = @(x) (A - 4.1 * eye (n)) \ x;
+%! fcn = @(x) (A - 4.1 * eye (n)) \ x;
 %! opts.issym = 0;  opts.isreal = 1;
-%! d1 = eigs (fn, n, k, 4.1, opts);
+%! d1 = eigs (fcn, n, k, 4.1, opts);
 %! assert (abs (d1), eigs (A, k, 4.1), 1e-11);
 %!testif HAVE_ARPACK
 %! [v1,d1] = eigs (A, k, "lm");
@@ -794,19 +794,19 @@
 %! assert (sort (imag (eigs (A, k, 4.1))),
 %!         sort (imag (eigs (A, speye (n), k, 4.1))), 1e-11);
 %!testif HAVE_ARPACK
-%! fn = @(x) A * x;
+%! fcn = @(x) A * x;
 %! opts.issym = 0;  opts.isreal = 0;
-%! d1 = eigs (fn, n, k, "lm", opts);
+%! d1 = eigs (fcn, n, k, "lm", opts);
 %! assert (abs (d1), abs (d0(end:-1:(end-k+1))), 1e-11);
 %!testif HAVE_ARPACK
-%! fn = @(x) A \ x;
+%! fcn = @(x) A \ x;
 %! opts.issym = 0;  opts.isreal = 0;
-%! d1 = eigs (fn, n, k, "sm", opts);
+%! d1 = eigs (fcn, n, k, "sm", opts);
 %! assert (abs (d1), d0(1:k), 1e-11);
 %!testif HAVE_ARPACK, HAVE_UMFPACK
-%! fn = @(x) (A - 4.1 * eye (n)) \ x;
+%! fcn = @(x) (A - 4.1 * eye (n)) \ x;
 %! opts.issym = 0;  opts.isreal = 0;
-%! d1 = eigs (fn, n, k, 4.1, opts);
+%! d1 = eigs (fcn, n, k, 4.1, opts);
 %! assert (abs (d1), eigs (A, k, 4.1), 1e-11);
 %!testif HAVE_ARPACK
 %! [v1,d1] = eigs (A, k, "lm");
@@ -1033,19 +1033,19 @@
 %!testif HAVE_ARPACK
 %! assert (eigs (A, k, 4.1), eigs (A, eye (n), k, 4.1), 1e-11);
 %!testif HAVE_ARPACK
-%! fn = @(x) A * x;
+%! fcn = @(x) A * x;
 %! opts.issym = 1;  opts.isreal = 1;
-%! d1 = eigs (fn, n, k, "lm", opts);
+%! d1 = eigs (fcn, n, k, "lm", opts);
 %! assert (d1, d0(end:-1:(end-k+1)), 1e-11);
 %!testif HAVE_ARPACK
-%! fn = @(x) A \ x;
+%! fcn = @(x) A \ x;
 %! opts.issym = 1;  opts.isreal = 1;
-%! d1 = eigs (fn, n, k, "sm", opts);
+%! d1 = eigs (fcn, n, k, "sm", opts);
 %! assert (d1, d0(k:-1:1), 1e-11);
 %!testif HAVE_ARPACK
-%! fn = @(x) (A - 4.1 * eye (n)) \ x;
+%! fcn = @(x) (A - 4.1 * eye (n)) \ x;
 %! opts.issym = 1;  opts.isreal = 1;
-%! d1 = eigs (fn, n, k, 4.1, opts);
+%! d1 = eigs (fcn, n, k, 4.1, opts);
 %! assert (d1, eigs (A, k, 4.1), 1e-11);
 %!testif HAVE_ARPACK
 %! [v1,d1] = eigs (A, k, "lm");
@@ -1156,19 +1156,19 @@
 %! assert (sort (imag (eigs (A, k, 4.1))),
 %!         sort (imag (eigs (A, eye (n), k, 4.1))), 1e-11);
 %!testif HAVE_ARPACK
-%! fn = @(x) A * x;
+%! fcn = @(x) A * x;
 %! opts.issym = 0;  opts.isreal = 1;
-%! d1 = eigs (fn, n, k, "lm", opts);
+%! d1 = eigs (fcn, n, k, "lm", opts);
 %! assert (abs (d1), abs (d0(end:-1:(end-k+1))), 1e-11);
 %!testif HAVE_ARPACK
-%! fn = @(x) A \ x;
+%! fcn = @(x) A \ x;
 %! opts.issym = 0;  opts.isreal = 1;
-%! d1 = eigs (fn, n, k, "sm", opts);
+%! d1 = eigs (fcn, n, k, "sm", opts);
 %! assert (abs (d1), d0(1:k), 1e-11);
 %!testif HAVE_ARPACK
-%! fn = @(x) (A - 4.1 * eye (n)) \ x;
+%! fcn = @(x) (A - 4.1 * eye (n)) \ x;
 %! opts.issym = 0;  opts.isreal = 1;
-%! d1 = eigs (fn, n, k, 4.1, opts);
+%! d1 = eigs (fcn, n, k, 4.1, opts);
 %! assert (abs (d1), eigs (A, k, 4.1), 1e-11);
 %!testif HAVE_ARPACK
 %! [v1,d1] = eigs (A, k, "lm");
@@ -1287,19 +1287,19 @@
 %! assert (sort (imag (eigs (A, k, 4.1))),
 %!         sort (imag (eigs (A, eye (n), k, 4.1))), 1e-11);
 %!testif HAVE_ARPACK
-%! fn = @(x) A * x;
+%! fcn = @(x) A * x;
 %! opts.issym = 0;  opts.isreal = 0;
-%! d1 = eigs (fn, n, k, "lm", opts);
+%! d1 = eigs (fcn, n, k, "lm", opts);
 %! assert (abs (d1), abs (d0(end:-1:(end-k+1))), 1e-11);
 %!testif HAVE_ARPACK
-%! fn = @(x) A \ x;
+%! fcn = @(x) A \ x;
 %! opts.issym = 0;  opts.isreal = 0;
-%! d1 = eigs (fn, n, k, "sm", opts);
+%! d1 = eigs (fcn, n, k, "sm", opts);
 %! assert (abs (d1), d0(1:k), 1e-11);
 %!testif HAVE_ARPACK
-%! fn = @(x) (A - 4.1 * eye (n)) \ x;
+%! fcn = @(x) (A - 4.1 * eye (n)) \ x;
 %! opts.issym = 0;  opts.isreal = 0;
-%! d1 = eigs (fn, n, k, 4.1, opts);
+%! d1 = eigs (fcn, n, k, 4.1, opts);
 %! assert (abs (d1), eigs (A, k, 4.1), 1e-11);
 %!testif HAVE_ARPACK
 %! [v1,d1] = eigs (A, k, "lm");
@@ -1452,12 +1452,12 @@
 %!testif HAVE_ARPACK
 %! A = toeplitz ([-2, 1, zeros(1, 8)]);
 %! A = kron (A, eye (10)) + kron (eye (10), A);
-%! Afun = @(x) A * x;
+%! Afcn = @(x) A * x;
 %! opts.v0 = (1:100)';
 %! opts.maxit = 3;
 %! opts.issym = true;
 %! warning ("off", "Octave:eigs:UnconvergedEigenvalues", "local");
-%! d = eigs (Afun, 100, 4, "sm", opts);
+%! d = eigs (Afcn, 100, 4, "sm", opts);
 %! assert (d(3:4), [NaN; NaN]);
 %!testif HAVE_ARPACK
 %! A = toeplitz ([-2, 1, zeros(1, 8)]);
@@ -1510,11 +1510,11 @@
 %!testif HAVE_ARPACK
 %! A = toeplitz ([0, 1, zeros(1, 8)], [0, -1, zeros(1, 8)]);
 %! A = kron (A, eye (10)) + kron (eye (10), A);
-%! Afun = @(x) A * x;
+%! Afcn = @(x) A * x;
 %! opts.v0 = (1:100)';
 %! opts.maxit = 4;
 %! warning ("off", "Octave:eigs:UnconvergedEigenvalues", "local");
-%! d = eigs (Afun, 100, 4, "lm", opts);
+%! d = eigs (Afcn, 100, 4, "lm", opts);
 %! assert (d(3:4), [NaN+1i*NaN; NaN+1i*NaN]);
 %!testif HAVE_ARPACK
 %! A = 1i * magic (100);
@@ -1532,12 +1532,12 @@
 %! assert (d(9:10), [NaN+1i*NaN; NaN+1i*NaN]);
 %!testif HAVE_ARPACK
 %! A = 1i * magic (100);
-%! Afun = @(x) A * x;
+%! Afcn = @(x) A * x;
 %! opts.v0 = (1:100)';
 %! opts.maxit = 1;
 %! opts.isreal = false;
 %! warning ("off", "Octave:eigs:UnconvergedEigenvalues", "local");
-%! d = eigs (Afun, 100, 6, "lm", opts);
+%! d = eigs (Afcn, 100, 6, "lm", opts);
 %! assert (d(6), NaN+1i*NaN);
 %!testif HAVE_ARPACK, HAVE_CHOLMOD
 %! A = sparse (magic (10));
@@ -1567,8 +1567,8 @@
 %! B = B * B';
 %! opts.v0 = (1:10)';
 %! [Evector, Evalues] = eigs (A, B, 4, "LM", opts);
-%! Afun = @(x) A * x;
-%! [Evector_f Evalues_f] = eigs (Afun, 10, B, 4, "LM", opts);
+%! Afcn = @(x) A * x;
+%! [Evector_f Evalues_f] = eigs (Afcn, 10, B, 4, "LM", opts);
 %! assert (Evector, Evector_f);
 %! assert (Evalues, Evalues_f);
 %!testif HAVE_ARPACK
@@ -1579,8 +1579,8 @@
 %! opts.v0 = (1:10)';
 %! [Evector, Evalues] = eigs (A, B, 4, "SM", opts);
 %! [L, U, P] = lu (A);
-%! Afun = @(x) U \ (L \ (P * x));
-%! [Evector_f Evalues_f] = eigs (Afun, 10, B, 4, "SM", opts);
+%! Afcn = @(x) U \ (L \ (P * x));
+%! [Evector_f Evalues_f] = eigs (Afcn, 10, B, 4, "SM", opts);
 %! assert (Evector, Evector_f);
 %! assert (Evalues, Evalues_f);
 %!testif HAVE_ARPACK
@@ -1591,9 +1591,9 @@
 %! B = B * B';
 %! opts.v0 = (1:10)';
 %! [Evector, Evalues] = eigs (A, B, 4, "LM", opts);
-%! Afun = @(x) A * x;
+%! Afcn = @(x) A * x;
 %! opts.issym = true;
-%! [Evector_f Evalues_f] = eigs (Afun, 10, B, 4, "LM", opts);
+%! [Evector_f Evalues_f] = eigs (Afcn, 10, B, 4, "LM", opts);
 %! assert (Evector, Evector_f);
 %! assert (Evalues, Evalues_f);
 %!testif HAVE_ARPACK
@@ -1605,9 +1605,9 @@
 %! opts.v0 = (1:10)';
 %! [Evector, Evalues] = eigs (A, B, 4, "SM", opts);
 %! [L, U, P] = lu (A);
-%! Afun = @(x) U \ (L \ (P * x));
+%! Afcn = @(x) U \ (L \ (P * x));
 %! opts.issym = true;
-%! [Evector_f Evalues_f] = eigs (Afun, 10, B, 4, "SM", opts);
+%! [Evector_f Evalues_f] = eigs (Afcn, 10, B, 4, "SM", opts);
 %! assert (Evector, Evector_f);
 %! assert (Evalues, Evalues_f);
 %!testif HAVE_ARPACK
@@ -1617,9 +1617,9 @@
 %! B = B * B';
 %! opts.v0 = (1:10)';
 %! [Evector, Evalues] = eigs (A, B, 4, "LM", opts);
-%! Afun = @(x) A * x;
+%! Afcn = @(x) A * x;
 %! opts.isreal = false;
-%! [Evector_f Evalues_f] = eigs (Afun, 10, B, 4, "LM", opts);
+%! [Evector_f Evalues_f] = eigs (Afcn, 10, B, 4, "LM", opts);
 %! assert (Evector, Evector_f);
 %! assert (Evalues, Evalues_f);
 %!testif HAVE_ARPACK
@@ -1630,9 +1630,9 @@
 %! opts.v0 = (1:10)';
 %! [Evector, Evalues] = eigs (A, B, 4, "SM", opts);
 %! [L, U, P] = lu (A);
-%! Afun = @(x) U \ (L \ (P *x));
+%! Afcn = @(x) U \ (L \ (P *x));
 %! opts.isreal = false;
-%! [Evector_f, Evalues_f] = eigs (Afun, 10, B, 4, "SM", opts);
+%! [Evector_f, Evalues_f] = eigs (Afcn, 10, B, 4, "SM", opts);
 %! assert (Evector, Evector_f);
 %! assert (Evalues, Evalues_f);
 
--- a/scripts/sparse/gmres.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/sparse/gmres.m	Mon Aug 29 13:58:00 2022 +0200
@@ -36,8 +36,8 @@
 ##
 ## @item @var{A} is the matrix of the linear system and it must be square.
 ## @var{A} can be passed as a matrix, function handle, or inline
-## function @code{Afun} such that @code{Afun(x) = A * x}.  Additional
-## parameters to @code{Afun} are passed after @var{x0}.
+## function @code{Afcn} such that @code{Afcn(x) = A * x}.  Additional
+## parameters to @code{Afcn} are passed after @var{x0}.
 ##
 ## @item @var{b} is the right hand side vector.  It must be a column vector
 ## with the same numbers of rows as @var{A}.
@@ -141,10 +141,10 @@
 ## restart = 5;
 ## [M1, M2] = ilu (A); # in this tridiag case, it corresponds to lu (A)
 ## M = M1 * M2;
-## Afun = @@(x) A * x;
-## Mfun = @@(x) M \ x;
-## M1fun = @@(x) M1 \ x;
-## M2fun = @@(x) M2 \ x;
+## Afcn = @@(x) A * x;
+## Mfcn = @@(x) M \ x;
+## M1fcn = @@(x) M1 \ x;
+## M2fcn = @@(x) M2 \ x;
 ## @end group
 ## @end example
 ##
@@ -158,7 +158,7 @@
 ## @code{@var{A} * @var{x}}
 ##
 ## @example
-## x = gmres (Afun, b, [], [], n)
+## x = gmres (Afcn, b, [], [], n)
 ## @end example
 ##
 ## @sc{Example 3:} usage of @code{gmres} with the restart
@@ -180,7 +180,7 @@
 ## @sc{Example 5:} @code{gmres} with a function as preconditioner
 ##
 ## @example
-## x = gmres (Afun, b, [], 1e-6, n, Mfun)
+## x = gmres (Afcn, b, [], 1e-6, n, Mfcn)
 ## @end example
 ##
 ## @sc{Example 6:} @code{gmres} with preconditioner matrices @var{M1}
@@ -193,7 +193,7 @@
 ## @sc{Example 7:} @code{gmres} with functions as preconditioners
 ##
 ## @example
-## x = gmres (Afun, b, 1e-6, n, M1fun, M2fun)
+## x = gmres (Afcn, b, 1e-6, n, M1fcn, M2fcn)
 ## @end example
 ##
 ## @sc{Example 8:} @code{gmres} with as input a function requiring an argument
@@ -206,8 +206,8 @@
 ##        y = A * y;
 ##      endfor
 ##   endfunction
-## Apfun = @@(x, p) Ap (A, x, p);
-## x = gmres (Apfun, b, [], [], [], [], [], [], 2);
+## Apfcn = @@(x, p) Ap (A, x, p);
+## x = gmres (Apfcn, b, [], [], [], [], [], [], 2);
 ## @end group
 ## @end example
 ##
@@ -248,7 +248,7 @@
     class_name = "double";
   endif
 
-  [Afun, M1fun, M2fun] = __alltohandles__ (A, b, M1, M2, "gmres");
+  [Afcn, M1fcn, M2fcn] = __alltohandles__ (A, b, M1, M2, "gmres");
 
   ## Check if the inputs are empty, and in case set them
   [tol, x0] = __default__input__ ({1e-06, zeros(size (b))}, tol, x0);
@@ -329,15 +329,15 @@
   flag = 1; # Default flag is maximum # of iterations exceeded
 
   ## begin loop
-  u = feval (Afun, x_old, varargin{:});
+  u = feval (Afcn, x_old, varargin{:});
   try
     warning ("error", "Octave:singular-matrix", "local");
-    prec_res = feval (M1fun, b - u, varargin{:});  # M1*(b-u)
-    prec_res = feval (M2fun, prec_res, varargin{:});
+    prec_res = feval (M1fcn, b - u, varargin{:});  # M1*(b-u)
+    prec_res = feval (M2fcn, prec_res, varargin{:});
     presn = norm (prec_res, 2);
     resvec(1) = presn;
-    z = feval (M1fun, b, varargin{:});
-    z = feval (M2fun, z, varargin{:});
+    z = feval (M1fcn, b, varargin{:});
+    z = feval (M2fcn, z, varargin{:});
     prec_b_norm = norm (z, 2);
     B (1) = presn;
     V(:, 1) = prec_res / presn;
@@ -352,18 +352,18 @@
       restart_it = 1;
       outer_it += 1;
       x_old = x;
-      u = feval (Afun, x_old, varargin{:});
-      prec_res = feval (M1fun, b - u, varargin{:});
-      prec_res = feval (M2fun, prec_res, varargin{:});
+      u = feval (Afcn, x_old, varargin{:});
+      prec_res = feval (M1fcn, b - u, varargin{:});
+      prec_res = feval (M2fcn, prec_res, varargin{:});
       presn = norm (prec_res, 2);
       B(1) = presn;
       H(:) = 0;
       V(:, 1) = prec_res / presn;
     endif
     ## basic iteration
-    u = feval (Afun, V(:, restart_it), varargin{:});
-    tmp = feval (M1fun, u, varargin{:});
-    tmp = feval (M2fun, tmp, varargin{:});
+    u = feval (Afcn, V(:, restart_it), varargin{:});
+    tmp = feval (M1fcn, u, varargin{:});
+    tmp = feval (M2fcn, tmp, varargin{:});
     [V(:,restart_it + 1), H(1:restart_it + 1, restart_it)] = ...
       mgorth (tmp, V(:,1:restart_it));
     Y = (H(1:restart_it + 1, 1:restart_it) \ B(1:restart_it + 1));
@@ -469,23 +469,23 @@
 %! M = M1 * M2;
 %! x = gmres (A, b, [], [], n);
 %! x = gmres (A, b, restart, [], n);  # gmres with restart
-%! Afun = @(x) A * x;
-%! x = gmres (Afun, b, [], [], n);
+%! Afcn = @(x) A * x;
+%! x = gmres (Afcn, b, [], [], n);
 %! x = gmres (A, b, [], 1e-6, n, M);  # gmres without restart
 %! x = gmres (A, b, [], 1e-6, n, M1, M2);
-%! Mfun = @(x) M \ x;
-%! x = gmres (Afun, b, [], 1e-6, n, Mfun);
-%! M1fun = @(x) M1 \ x;
-%! M2fun = @(x) M2 \ x;
-%! x = gmres (Afun, b, [], 1e-6, n, M1fun, M2fun);
+%! Mfcn = @(x) M \ x;
+%! x = gmres (Afcn, b, [], 1e-6, n, Mfcn);
+%! M1fcn = @(x) M1 \ x;
+%! M2fcn = @(x) M2 \ x;
+%! x = gmres (Afcn, b, [], 1e-6, n, M1fcn, M2fcn);
 %! function y = Ap (A, x, p)  # compute A^p * x
 %!    y = x;
 %!    for i = 1:p
 %!      y = A * y;
 %!    endfor
 %!  endfunction
-%! Afun = @(x, p) Ap (A, x, p);
-%! x = gmres (Afun, b, [], [], n, [], [], [], 2);  # solution of A^2 * x = b
+%! Afcn = @(x, p) Ap (A, x, p);
+%! x = gmres (Afcn, b, [], [], n, [], [], [], 2);  # solution of A^2 * x = b
 
 %!demo
 %! n = 10;
@@ -510,28 +510,28 @@
 %! b = sum (A, 2);
 %! M1 = diag (sqrt (diag (A)));
 %! M2 = M1;
-%! Afun = @(z) A * z;
-%! M1_fun = @(z) M1 \ z;
-%! M2_fun = @(z) M2 \ z;
+%! Afcn = @(z) A * z;
+%! M1_fcn = @(z) M1 \ z;
+%! M2_fcn = @(z) M2 \ z;
 %! [x, flag] = gmres (A, b);
 %! assert (flag, 0);
 %! [x, flag] = gmres (A, b, [], [], [], M1, M2);
 %! assert (flag, 0);
-%! [x, flag] = gmres (A, b, [], [], [], M1_fun, M2_fun);
+%! [x, flag] = gmres (A, b, [], [], [], M1_fcn, M2_fcn);
 %! assert (flag, 0);
-%! [x, flag] = gmres (A, b, [], [], [], M1_fun, M2);
+%! [x, flag] = gmres (A, b, [], [], [], M1_fcn, M2);
 %! assert (flag, 0);
-%! [x, flag] = gmres (A, b, [], [], [], M1, M2_fun);
+%! [x, flag] = gmres (A, b, [], [], [], M1, M2_fcn);
 %! assert (flag, 0);
-%! [x, flag] = gmres (Afun, b);
+%! [x, flag] = gmres (Afcn, b);
 %! assert (flag, 0);
-%! [x, flag] = gmres (Afun, b, [],[],[], M1, M2);
+%! [x, flag] = gmres (Afcn, b, [],[],[], M1, M2);
 %! assert (flag, 0);
-%! [x, flag] = gmres (Afun, b, [],[],[], M1_fun, M2);
+%! [x, flag] = gmres (Afcn, b, [],[],[], M1_fcn, M2);
 %! assert (flag, 0);
-%! [x, flag] = gmres (Afun, b, [],[],[], M1, M2_fun);
+%! [x, flag] = gmres (Afcn, b, [],[],[], M1, M2_fcn);
 %! assert (flag, 0);
-%! [x, flag] = gmres (Afun, b, [],[],[], M1_fun, M2_fun);
+%! [x, flag] = gmres (Afcn, b, [],[],[], M1_fcn, M2_fcn);
 %! assert (flag, 0);
 
 %!test
@@ -634,11 +634,11 @@
 %! assert (class (x), "single");
 
 %!test
-%!function y = Afun (x)
+%!function y = Afcn (x)
 %!   A = toeplitz ([2, 1, 0, 0], [2, -1, 0, 0]);
 %!   y = A * x;
 %!endfunction
-%! [x, flag] = gmres ("Afun", [1; 2; 2; 3]);
+%! [x, flag] = gmres ("Afcn", [1; 2; 2; 3]);
 %! assert (x, ones (4, 1), 1e-6);
 
 %!test # preconditioned residual
--- a/scripts/sparse/ilu.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/sparse/ilu.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} ilu (@var{A})
-## @deftypefnx {} {} ilu (@var{A}, @var{opts})
+## @deftypefn  {} {@var{LUA} =} ilu (@var{A})
+## @deftypefnx {} {@var{LUA} =} ilu (@var{A}, @var{opts})
 ## @deftypefnx {} {[@var{L}, @var{U}] =} ilu (@dots{})
 ## @deftypefnx {} {[@var{L}, @var{U}, @var{P}] =} ilu (@dots{})
 ##
--- a/scripts/sparse/pcg.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/sparse/pcg.m	Mon Aug 29 13:58:00 2022 +0200
@@ -36,8 +36,8 @@
 ## @itemize
 ## @item @var{A} is the matrix of the linear system and it must be square.
 ## @var{A} can be passed as a matrix, function handle, or inline function
-## @code{Afun} such that @code{Afun(x) = A * x}.  Additional parameters to
-## @code{Afun} may be passed after @var{x0}.
+## @code{Afcn} such that @code{Afcn(x) = A * x}.  Additional parameters to
+## @code{Afcn} may be passed after @var{x0}.
 ##
 ## @var{A} has to be Hermitian and Positive Definite (@nospell{HPD})@.  If
 ## @code{pcg} detects @var{A} not to be positive definite, a warning is printed
@@ -163,10 +163,10 @@
 ## M1 = ichol (A); # in this tridiagonal case it corresponds to chol (A)'
 ## M2 = M1';
 ## M = M1 * M2;
-## Afun = @@(x) A * x;
-## Mfun = @@(x) M \ x;
-## M1fun = @@(x) M1 \ x;
-## M2fun = @@(x) M2 \ x;
+## Afcn = @@(x) A * x;
+## Mfcn = @@(x) M \ x;
+## M1fcn = @@(x) M1 \ x;
+## M2fcn = @@(x) M2 \ x;
 ## @end group
 ## @end example
 ##
@@ -180,7 +180,7 @@
 ## @code{@var{A} * @var{x}}
 ##
 ## @example
-## x = pcg (Afun, b)
+## x = pcg (Afcn, b)
 ## @end example
 ##
 ## @sc{Example 3:} @code{pcg} with a preconditioner matrix @var{M}
@@ -192,7 +192,7 @@
 ## @sc{Example 4:} @code{pcg} with a function as preconditioner
 ##
 ## @example
-## x = pcg (Afun, b, 1e-6, 100, Mfun)
+## x = pcg (Afcn, b, 1e-6, 100, Mfcn)
 ## @end example
 ##
 ## @sc{Example 5:} @code{pcg} with preconditioner matrices @var{M1}
@@ -205,7 +205,7 @@
 ## @sc{Example 6:} @code{pcg} with functions as preconditioners
 ##
 ## @example
-## x = pcg (Afun, b, 1e-6, 100, M1fun, M2fun)
+## x = pcg (Afcn, b, 1e-6, 100, M1fcn, M2fcn)
 ## @end example
 ##
 ## @sc{Example 7:} @code{pcg} with as input a function requiring an argument
@@ -218,8 +218,8 @@
 ##        y = A * y;
 ##      endfor
 ##   endfunction
-## Apfun = @@(x, p) Ap (A, x, p);
-## x = pcg (Apfun, b, [], [], [], [], [], 2);
+## Apfcn = @@(x, p) Ap (A, x, p);
+## x = pcg (Apfcn, b, [], [], [], [], [], 2);
 ## @end group
 ## @end example
 ##
@@ -275,7 +275,7 @@
   ## Check if the input data A,b,m1,m2 are consistent (i.e. if they are
   ## matrix or function handle)
 
-  [Afun, M1fun, M2fun] = __alltohandles__ (A, b, M1, M2, "pcg");
+  [Afcn, M1fcn, M2fcn] = __alltohandles__ (A, b, M1, M2, "pcg");
 
   maxit += 2;
   n_arg_out = nargout;
@@ -301,7 +301,7 @@
   ## x_pr (x previous) needs to check the stagnation
   ## x_min needs to save the iterated with minimum residual
 
-  r = b - feval (Afun, x, varargin{:});
+  r = b - feval (Afcn, x, varargin{:});
   iter = 2;
   iter_min = 0;
   flag = 1;
@@ -320,15 +320,15 @@
     if (iter == 2) # Check whether M1 or M2 are singular
       try
         warning ("error","Octave:singular-matrix","local");
-        z = feval (M1fun, r, varargin{:});
-        z = feval (M2fun, z, varargin{:});
+        z = feval (M1fcn, r, varargin{:});
+        z = feval (M2fcn, z, varargin{:});
       catch
         flag = 2;
         break;
       end_try_catch
     else
-      z = feval (M1fun, r, varargin{:});
-      z = feval (M2fun, z, varargin{:});
+      z = feval (M1fcn, r, varargin{:});
+      z = feval (M2fcn, z, varargin{:});
     endif
 
     tau = z' * r;
@@ -336,7 +336,7 @@
     beta = tau / old_tau;
     old_tau = tau;
     p = z + beta * p;
-    w = feval (Afun, p, varargin{:});
+    w = feval (Afcn, p, varargin{:});
 
     ## Needed only for eigest.
 
@@ -378,8 +378,8 @@
   if (n_arg_out > 5)
   ## Apply the preconditioner once more and finish with the precond
   ## residual.
-    z = feval (M1fun, r, varargin{:});
-    z = feval (M2fun, z, varargin{:});
+    z = feval (M1fcn, r, varargin{:});
+    z = feval (M2fcn, z, varargin{:});
   endif
 
   ## (Eventually) computes the eigenvalue of inv(m2)*inv(m1)*A
@@ -466,24 +466,24 @@
 %! M2 = M1';
 %! M = M1 * M2;
 %! x = pcg (A, b);
-%! Afun = @(x) A * x;
-%! x = pcg (Afun, b);
+%! Afcn = @(x) A * x;
+%! x = pcg (Afcn, b);
 %! x = pcg (A, b, 1e-6, 100, M);
 %! x = pcg (A, b, 1e-6, 100, M1, M2);
-%! Mfun = @(x) M \ x;
-%! x = pcg (Afun, b, 1e-6, 100, Mfun);
-%! M1fun = @(x) M1 \ x;
-%! M2fun = @(x) M2 \ x;
-%! x = pcg (Afun, b, 1e-6, 100, M1fun, M2fun);
+%! Mfcn = @(x) M \ x;
+%! x = pcg (Afcn, b, 1e-6, 100, Mfcn);
+%! M1fcn = @(x) M1 \ x;
+%! M2fcn = @(x) M2 \ x;
+%! x = pcg (Afcn, b, 1e-6, 100, M1fcn, M2fcn);
 %! function y = Ap (A, x, p)  # compute A^p * x
 %!    y = x;
 %!    for i = 1:p
 %!      y = A * y;
 %!    endfor
 %!  endfunction
-%! Afun = @(x, p) Ap (A, x, p);
+%! Afcn = @(x, p) Ap (A, x, p);
 %! ## solution of A^2 * x = b
-%! x = pcg (Afun, b, [], [], [], [], [], 2);
+%! x = pcg (Afcn, b, [], [], [], [], [], 2);
 
 %!demo
 %! n = 10;
@@ -506,32 +506,32 @@
 %! b = A * ones (5, 1);
 %! M1 = diag (sqrt (diag (A)));
 %! M2 = M1;  # M1 * M2 is the Jacobi preconditioner
-%! Afun = @(z) A*z;
-%! M1_fun = @(z) M1 \ z;
-%! M2_fun = @(z) M2 \ z;
+%! Afcn = @(z) A*z;
+%! M1_fcn = @(z) M1 \ z;
+%! M2_fcn = @(z) M2 \ z;
 %! [x, flag, ~, iter] = pcg (A,b);
 %! assert (flag, 0);
 %! [x, flag, ~ , iter] = pcg (A, b, [], [], M1 * M2);
 %! assert (flag, 0);
 %! [x, flag, ~ , iter] = pcg (A, b, [], [], M1, M2);
 %! assert (flag, 0);
-%! [x, flag] = pcg (A, b, [], [], M1_fun, M2_fun);
+%! [x, flag] = pcg (A, b, [], [], M1_fcn, M2_fcn);
 %! assert (flag, 0);
-%! [x, flag] = pcg (A, b,[],[], M1_fun, M2);
+%! [x, flag] = pcg (A, b,[],[], M1_fcn, M2);
 %! assert (flag, 0);
-%! [x, flag] = pcg (A, b,[],[], M1, M2_fun);
+%! [x, flag] = pcg (A, b,[],[], M1, M2_fcn);
 %! assert (flag, 0);
-%! [x, flag] = pcg (Afun, b);
+%! [x, flag] = pcg (Afcn, b);
 %! assert (flag, 0);
-%! [x, flag] = pcg (Afun, b,[],[], M1 * M2);
+%! [x, flag] = pcg (Afcn, b,[],[], M1 * M2);
 %! assert (flag, 0);
-%! [x, flag] = pcg (Afun, b,[],[], M1, M2);
+%! [x, flag] = pcg (Afcn, b,[],[], M1, M2);
 %! assert (flag, 0);
-%! [x, flag] = pcg (Afun, b,[],[], M1_fun, M2);
+%! [x, flag] = pcg (Afcn, b,[],[], M1_fcn, M2);
 %! assert (flag, 0);
-%! [x, flag] = pcg (Afun, b,[],[], M1, M2_fun);
+%! [x, flag] = pcg (Afcn, b,[],[], M1, M2_fcn);
 %! assert (flag, 0);
-%! [x, flag] = pcg (Afun, b,[],[], M1_fun, M2_fun);
+%! [x, flag] = pcg (Afcn, b,[],[], M1_fcn, M2_fcn);
 %! assert (flag, 0);
 
 %!test
@@ -658,11 +658,11 @@
 %! assert (class (x), "single");
 
 %!test
-%!function y = Afun (x)
+%!function y = Afcn (x)
 %!   A = toeplitz ([2, 1, 0, 0]);
 %!   y = A * x;
 %!endfunction
-%! [x, flag] = pcg ("Afun", [3; 4; 4; 3]);
+%! [x, flag] = pcg ("Afcn", [3; 4; 4; 3]);
 %! assert (x, ones (4, 1), 1e-6);
 
 %!test
--- a/scripts/sparse/private/__alltohandles__.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/sparse/private/__alltohandles__.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {[@var{Afun}, @var{M1fun}, @var{M2fun}] =} __alltohandles__ (@var{A}, @var{b}, @var{M1}, @var{M2}, @var{solver_name})
+## @deftypefn {} {[@var{Afcn}, @var{M1fcn}, @var{M2fcn}] =} __alltohandles__ (@var{A}, @var{b}, @var{M1}, @var{M2}, @var{solver_name})
 ##
 ## Check if the parameters @var{A} (matrix of our linear system), @var{b}
 ## (right hand side vector), @var{M1}, @var{M2} (preconditioner matrices) are
@@ -47,13 +47,13 @@
 ##
 ## @itemize
 ##
-## @item @var{Afun}, @var{M1fun}, @var{M2fun} are the corresponding
+## @item @var{Afcn}, @var{M1fcn}, @var{M2fcn} are the corresponding
 ## function handles.
 ##
 ## @end itemize
 ## @end deftypefn
 
-function [Afun, M1fun, M2fun] = __alltohandles__ (A, b, M1, M2, solver_name)
+function [Afcn, M1fcn, M2fcn] = __alltohandles__ (A, b, M1, M2, solver_name)
 
   A_is_numeric = false;
   M1_is_numeric = false;
@@ -61,9 +61,9 @@
 
   ## Check A and set its type
   if (is_function_handle (A))
-     Afun = A;
+     Afcn = A;
   elseif (ischar (A))
-    Afun = str2func (A);
+    Afcn = str2func (A);
   elseif (! isnumeric (A) || ! issquare (A))
     error ([solver_name, ": A must be a square matrix or a function handle"]);
   else
@@ -78,18 +78,18 @@
     switch (solver_name)
       case {"pcg", "gmres", "bicgstab", "cgs", "tfqmr"}
         ## methods which do not require the transpose
-        M1fun = @(x) x;
+        M1fcn = @(x) x;
       case {"bicg"}
         ## methods which do require the transpose
-        M1fun = @(x, ~) x;
+        M1fcn = @(x, ~) x;
       otherwise
         error (["__alltohandles__: unknown method: ", solver_name]);
     endswitch
   else # M1 not empty
     if (is_function_handle (M1))
-      M1fun = M1;
+      M1fcn = M1;
     elseif (ischar (M1))
-      M1fun = str2func (M1);
+      M1fcn = str2func (M1);
     elseif (! isnumeric (M1) || ! issquare (M1))
       error ([solver_name, ": M1 must be a square matrix or a function handle"]);
     else
@@ -101,18 +101,18 @@
     switch (solver_name)
       case {"pcg", "gmres", "bicgstab", "cgs", "tfqmr"}
         ## methods which do not require the transpose
-        M2fun = @(x) x;
+        M2fcn = @(x) x;
       case {"bicg"}
         ## methods which do require the transpose
-        M2fun = @(x, ~) x;
+        M2fcn = @(x, ~) x;
       otherwise
         error (["__alltohandles__: unknown method: ", solver_name]);
     endswitch
   else # M2 not empty
     if (is_function_handle (M2))
-      M2fun = M2;
+      M2fcn = M2;
     elseif (ischar (M2))
-      M2fun = str2func (M2);
+      M2fcn = str2func (M2);
     elseif (! isnumeric (M2) || ! issquare (M2))
       error ([solver_name, ": M2 must be a square matrix or a function handle"]);
     else
@@ -124,24 +124,24 @@
     case {"pcg", "gmres", "bicgstab", "cgs", "tfqmr"}
       ## methods which do not require the transpose
       if (A_is_numeric)
-        Afun = @(x) A * x;
+        Afcn = @(x) A * x;
       endif
       if (M1_is_numeric)
-        M1fun = @(x) M1 \ x;
+        M1fcn = @(x) M1 \ x;
       endif
       if (M2_is_numeric)
-        M2fun = @(x) M2 \ x;
+        M2fcn = @(x) M2 \ x;
       endif
     case {"bicg"}
       ## methods which do require the transpose
       if (A_is_numeric)
-        Afun = @(x, trans) A_sub (A, x, trans);
+        Afcn = @(x, trans) A_sub (A, x, trans);
       endif
       if (M1_is_numeric)
-        M1fun = @(x, trans) M_sub (M1, x, trans);
+        M1fcn = @(x, trans) M_sub (M1, x, trans);
       endif
       if (M2_is_numeric)
-        M2fun = @(x, trans) M_sub (M2, x, trans);
+        M2fcn = @(x, trans) M_sub (M2, x, trans);
       endif
     otherwise
       error (["__alltohandles__: unknown method: ", solver_name]);
--- a/scripts/sparse/private/__sprand__.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/sparse/private/__sprand__.m	Mon Aug 29 13:58:00 2022 +0200
@@ -27,9 +27,9 @@
 ## public domain.
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} __sprand__ (@var{s}, @var{randfun})
-## @deftypefnx {} {} __sprand__ (@var{m}, @var{n}, @var{d}, @var{fcnname}, @var{randfun})
-## @deftypefnx {} {} __sprand__ (@var{m}, @var{n}, @var{d}, @var{rc}, @var{fcnname}, @var{randfun})
+## @deftypefn  {} {@var{S} =} __sprand__ (@var{s}, @var{randfcn})
+## @deftypefnx {} {@var{S} =} __sprand__ (@var{m}, @var{n}, @var{d}, @var{fcnname}, @var{randfcn})
+## @deftypefnx {} {@var{S} =} __sprand__ (@var{m}, @var{n}, @var{d}, @var{rc}, @var{fcnname}, @var{randfcn})
 ## Undocumented internal function.
 ## @end deftypefn
 
@@ -38,15 +38,15 @@
 function S = __sprand__ (varargin)
 
   if (nargin == 2)
-    [m, randfun] = deal (varargin{1:2});
+    [m, randfcn] = deal (varargin{1:2});
     [i, j] = find (m);
     [nr, nc] = size (m);
-    S = sparse (i, j, randfun (size (i)), nr, nc);
+    S = sparse (i, j, randfcn (size (i)), nr, nc);
   else
     if (nargin == 5)
-      [m, n, d, fcnname, randfun] = deal (varargin{:});
+      [m, n, d, fcnname, randfcn] = deal (varargin{:});
     else
-      [m, n, d, rc, fcnname, randfun] = deal (varargin{:});
+      [m, n, d, rc, fcnname, randfcn] = deal (varargin{:});
     endif
 
     if (! (isscalar (m) && m == fix (m) && m >= 0))
@@ -87,7 +87,7 @@
         [i, j] = ind2sub ([m, n], idx);
       endif
 
-      S = sparse (i, j, randfun (k, 1), m, n);
+      S = sparse (i, j, randfcn (k, 1), m, n);
 
     elseif (nargin == 6)
       ## Create a matrix with specified reciprocal condition number.
--- a/scripts/sparse/qmr.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/sparse/qmr.m	Mon Aug 29 13:58:00 2022 +0200
@@ -97,9 +97,9 @@
   if (nargin >= 2 && isvector (full (b)))
 
     if (ischar (A))
-      fun = str2func (A);
-      Ax  = @(x) feval (fun, x, "notransp");
-      Atx = @(x) feval (fun, x, "transp");
+      fcn = str2func (A);
+      Ax  = @(x) feval (fcn, x, "notransp");
+      Atx = @(x) feval (fcn, x, "transp");
     elseif (is_function_handle (A))
       Ax  = @(x) feval (A, x, "notransp");
       Atx = @(x) feval (A, x, "transp");
@@ -124,9 +124,9 @@
       M1m1x = @(x, ignore) x;
       M1tm1x = M1m1x;
     elseif (ischar (M1))
-      fun = str2func (M1);
-      M1m1x  = @(x) feval (fun, x, "notransp");
-      M1tm1x = @(x) feval (fun, x, "transp");
+      fcn = str2func (M1);
+      M1m1x  = @(x) feval (fcn, x, "notransp");
+      M1tm1x = @(x) feval (fcn, x, "transp");
     elseif (is_function_handle (M1))
       M1m1x  = @(x) feval (M1, x, "notransp");
       M1tm1x = @(x) feval (M1, x, "transp");
@@ -141,9 +141,9 @@
       M2m1x = @(x, ignore) x;
       M2tm1x = M2m1x;
     elseif (ischar (M2))
-      fun = str2func (M2);
-      M2m1x  = @(x) feval (fun, x, "notransp");
-      M2tm1x = @(x) feval (fun, x, "transp");
+      fcn = str2func (M2);
+      M2m1x  = @(x) feval (fcn, x, "notransp");
+      M2tm1x = @(x) feval (fcn, x, "transp");
     elseif (is_function_handle (M2))
       M2m1x  = @(x) feval (M2, x, "notransp");
       M2tm1x = @(x) feval (M2, x, "transp");
@@ -290,7 +290,7 @@
 %! [x, flag, relres, iter, resvec] = qmr (A, b, rtol, maxit, M1, M2);
 %! assert (x, ones (size (b)), 1e-7);
 
-%!function y = afun (x, t, a)
+%!function y = afcn (x, t, a)
 %!  switch (t)
 %!    case "notransp"
 %!      y = a * x;
@@ -308,7 +308,7 @@
 %! M1 = spdiags ([ones(n,1)/(-2) ones(n,1)],-1:0, n, n);
 %! M2 = spdiags ([4*ones(n,1) -ones(n,1)], 0:1, n, n);
 %!
-%! [x, flag, relres, iter, resvec] = qmr (@(x, t) afun (x, t, A),
+%! [x, flag, relres, iter, resvec] = qmr (@(x, t) afcn (x, t, A),
 %!                                         b, rtol, maxit, M1, M2);
 %! assert (x, ones (size (b)), 1e-7);
 
--- a/scripts/sparse/sprand.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/sparse/sprand.m	Mon Aug 29 13:58:00 2022 +0200
@@ -27,9 +27,9 @@
 ## public domain.
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} sprand (@var{m}, @var{n}, @var{d})
-## @deftypefnx {} {} sprand (@var{m}, @var{n}, @var{d}, @var{rc})
-## @deftypefnx {} {} sprand (@var{s})
+## @deftypefn  {} {@var{s} =} sprand (@var{m}, @var{n}, @var{d})
+## @deftypefnx {} {@var{s} =} sprand (@var{m}, @var{n}, @var{d}, @var{rc})
+## @deftypefnx {} {@var{s} =} sprand (@var{s})
 ## Generate a sparse matrix with uniformly distributed random values.
 ##
 ## The size of the matrix is @var{m}x@var{n} with a density of values @var{d}.
--- a/scripts/sparse/sprandn.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/sparse/sprandn.m	Mon Aug 29 13:58:00 2022 +0200
@@ -27,9 +27,9 @@
 ## public domain.
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} sprandn (@var{m}, @var{n}, @var{d})
-## @deftypefnx {} {} sprandn (@var{m}, @var{n}, @var{d}, @var{rc})
-## @deftypefnx {} {} sprandn (@var{s})
+## @deftypefn  {} {@var{s} =} sprandn (@var{m}, @var{n}, @var{d})
+## @deftypefnx {} {@var{s} =} sprandn (@var{m}, @var{n}, @var{d}, @var{rc})
+## @deftypefnx {} {@var{s} =} sprandn (@var{s})
 ## Generate a sparse matrix with normally distributed random values.
 ##
 ## The size of the matrix is @var{m}x@var{n} with a density of values @var{d}.
--- a/scripts/sparse/sprandsym.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/sparse/sprandsym.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} sprandsym (@var{n}, @var{d})
-## @deftypefnx {} {} sprandsym (@var{s})
+## @deftypefn  {} {@var{S} =} sprandsym (@var{n}, @var{d})
+## @deftypefnx {} {@var{S} =} sprandsym (@var{s})
 ## Generate a symmetric random sparse matrix.
 ##
 ## The size of the matrix will be @var{n}x@var{n}, with a density of values
--- a/scripts/sparse/tfqmr.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/sparse/tfqmr.m	Mon Aug 29 13:58:00 2022 +0200
@@ -35,8 +35,8 @@
 ##
 ## @item @var{A} is the matrix of the linear system and it must be square.
 ## @var{A} can be passed as a matrix, function handle, or inline
-## function @code{Afun} such that @code{Afun(x) = A * x}.  Additional
-## parameters to @code{Afun} are passed after @var{x0}.
+## function @code{Afcn} such that @code{Afcn(x) = A * x}.  Additional
+## parameters to @code{Afcn} are passed after @var{x0}.
 ##
 ## @item @var{b} is the right hand side vector.  It must be a column vector
 ## with the same number of rows as @var{A}.
@@ -115,10 +115,10 @@
 ## restart = 5;
 ## [M1, M2] = ilu (A); # in this tridiag case it corresponds to chol (A)'
 ## M = M1 * M2;
-## Afun = @@(x) A * x;
-## Mfun = @@(x) M \ x;
-## M1fun = @@(x) M1 \ x;
-## M2fun = @@(x) M2 \ x;
+## Afcn = @@(x) A * x;
+## Mfcn = @@(x) M \ x;
+## M1fcn = @@(x) M1 \ x;
+## M2fcn = @@(x) M2 \ x;
 ## @end group
 ## @end example
 ##
@@ -132,7 +132,7 @@
 ## @code{@var{A} * @var{x}}
 ##
 ## @example
-## x = tfqmr (Afun, b, [], n)
+## x = tfqmr (Afcn, b, [], n)
 ## @end example
 ##
 ## @sc{Example 3:} @code{tfqmr} with a preconditioner matrix @var{M}
@@ -144,7 +144,7 @@
 ## @sc{Example 4:} @code{tfqmr} with a function as preconditioner
 ##
 ## @example
-## x = tfqmr (Afun, b, 1e-6, n, Mfun)
+## x = tfqmr (Afcn, b, 1e-6, n, Mfcn)
 ## @end example
 ##
 ## @sc{Example 5:} @code{tfqmr} with preconditioner matrices @var{M1}
@@ -157,7 +157,7 @@
 ## @sc{Example 6:} @code{tfmqr} with functions as preconditioners
 ##
 ## @example
-## x = tfqmr (Afun, b, 1e-6, n, M1fun, M2fun)
+## x = tfqmr (Afcn, b, 1e-6, n, M1fcn, M2fcn)
 ## @end example
 ##
 ## @sc{Example 7:} @code{tfqmr} with as input a function requiring an argument
@@ -170,8 +170,8 @@
 ##      y = A * y;
 ##    endfor
 ##  endfunction
-## Apfun = @@(x, string, p) Ap (A, x, string, p);
-## x = tfqmr (Apfun, b, [], [], [], [], [], 2);
+## Apfcn = @@(x, string, p) Ap (A, x, string, p);
+## x = tfqmr (Apfcn, b, [], [], [], [], [], 2);
 ## @end group
 ## @end example
 ##
@@ -206,7 +206,7 @@
          tfqmr (A, b, tol = [], maxit = [], M1 = [], M2 = [], ...
                 x0 = [], varargin)
 
-  [Afun, M1fun, M2fun] = __alltohandles__ (A, b, M1, M2, "tfqmr");
+  [Afcn, M1fcn, M2fcn] = __alltohandles__ (A, b, M1, M2, "tfqmr");
 
   [tol, maxit, x0] = __default__input__ ({1e-06, 2 * min(20, rows (b)), ...
                                           zeros(rows (b), 1)}, tol, ...
@@ -233,7 +233,7 @@
   resvec = zeros (maxit, 1);
   flag = 1;
 
-  w = u = r = r_star = b - feval (Afun, x0, varargin{:});
+  w = u = r = r_star = b - feval (Afcn, x0, varargin{:});
   rho_1 = (r_star' * r);
   d = 0;
   tau = norm (r, 2);
@@ -243,9 +243,9 @@
 
   try
     warning ("error", "Octave:singular-matrix", "local");
-    u_hat = feval (M1fun, u, varargin{:});
-    u_hat = feval (M2fun, u_hat, varargin{:});
-    v = feval (Afun, u_hat, varargin{:});
+    u_hat = feval (M1fcn, u, varargin{:});
+    u_hat = feval (M2fcn, u_hat, varargin{:});
+    v = feval (Afcn, u_hat, varargin{:});
   catch
     flag = 2;
   end_try_catch
@@ -262,16 +262,16 @@
       alpha = rho_1 / v_r;
       u_1 = u - alpha * v;  # u at the after iteration
     endif
-    u_hat = feval (M1fun, u, varargin{:});
-    u_hat = feval (M2fun, u_hat, varargin{:});
-    w -= alpha * feval (Afun, u_hat, varargin{:});
+    u_hat = feval (M1fcn, u, varargin{:});
+    u_hat = feval (M2fcn, u_hat, varargin{:});
+    w -= alpha * feval (Afcn, u_hat, varargin{:});
     d = u_hat + ((theta * theta) / alpha) * eta * d;
     theta = norm (w, 2) / tau;
     c = 1 / sqrt (1 + theta * theta);
     tau *= theta * c;
     eta = (c * c) * alpha;
     x += eta * d;
-    r -= eta * feval (Afun, d, varargin{:});
+    r -= eta * feval (Afcn, d, varargin{:});
     if (it < 0) # iter is odd
       rho_2 = rho_1;
       rho_1 = (r_star' * w);
@@ -283,10 +283,10 @@
       endif
       beta = rho_1 / rho_2;
       u_1 = w + beta * u; # u at the after iteration
-      u1_hat = feval (M1fun, u_1, varargin{:});
-      u1_hat = feval (M2fun, u1_hat, varargin{:});
-      v = feval (Afun, u1_hat, varargin{:}) + ...
-          beta * (feval (Afun, u_hat, varargin{:}) + beta * v);
+      u1_hat = feval (M1fcn, u_1, varargin{:});
+      u1_hat = feval (M2fcn, u1_hat, varargin{:});
+      v = feval (Afcn, u1_hat, varargin{:}) + ...
+          beta * (feval (Afcn, u_hat, varargin{:}) + beta * v);
     endif
     u = u_1;
     iter += 1;
@@ -355,28 +355,28 @@
 %! M1 = diag (sqrt (diag (A)));
 %! M2 = M1;
 %! maxit = 10;
-%! Afun = @(z) A * z;
-%! M1_fun = @(z) M1 \ z;
-%! M2_fun = @(z) M2 \ z;
+%! Afcn = @(z) A * z;
+%! M1_fcn = @(z) M1 \ z;
+%! M2_fcn = @(z) M2 \ z;
 %! [x, flag] = tfqmr (A,b);
 %! assert (flag, 0);
 %! [x, flag] = tfqmr (A, b, [], maxit, M1, M2);
 %! assert (flag, 0);
-%! [x, flag] = tfqmr (A, b, [], maxit, M1_fun, M2_fun);
+%! [x, flag] = tfqmr (A, b, [], maxit, M1_fcn, M2_fcn);
 %! assert (flag, 0);
-%! [x, flag] = tfqmr (A, b, [], maxit, M1_fun, M2);
+%! [x, flag] = tfqmr (A, b, [], maxit, M1_fcn, M2);
 %! assert (flag, 0);
-%! [x, flag] = tfqmr (A, b, [], maxit, M1, M2_fun);
+%! [x, flag] = tfqmr (A, b, [], maxit, M1, M2_fcn);
 %! assert (flag, 0);
-%! [x, flag] = tfqmr (Afun, b);
+%! [x, flag] = tfqmr (Afcn, b);
 %! assert (flag, 0);
-%! [x, flag] = tfqmr (Afun, b, [], maxit, M1, M2);
+%! [x, flag] = tfqmr (Afcn, b, [], maxit, M1, M2);
 %! assert (flag, 0);
-%! [x, flag] = tfqmr (Afun, b, [], maxit, M1_fun, M2);
+%! [x, flag] = tfqmr (Afcn, b, [], maxit, M1_fcn, M2);
 %! assert (flag, 0);
-%! [x, flag] = tfqmr (Afun, b, [], maxit, M1, M2_fun);
+%! [x, flag] = tfqmr (Afcn, b, [], maxit, M1, M2_fcn);
 %! assert (flag, 0);
-%! [x, flag] = tfqmr (Afun, b, [], maxit, M1_fun, M2_fun);
+%! [x, flag] = tfqmr (Afcn, b, [], maxit, M1_fcn, M2_fcn);
 %! assert (flag, 0);
 
 %!shared A, b, n, M1, M2
@@ -393,15 +393,15 @@
 %! assert (x, ones (size (b)), 1e-7);
 %!
 %!test
-%!function y = afun (x, a)
+%!function y = afcn (x, a)
 %!  y = a * x;
 %!endfunction
 %!
 %! tol = 1e-8;
 %! maxit = 15;
 %!
-%! [x, flag, relres, iter, resvec] = tfqmr (@(x) afun (x, A), b,
-%!                                             tol, maxit, M1, M2);
+%! [x, flag, relres, iter, resvec] = tfqmr (@(x) afcn (x, A), b,
+%!                                          tol, maxit, M1, M2);
 %! assert (x, ones (size (b)), 1e-7);
 
 %!test
@@ -458,11 +458,11 @@
 %! assert (class (x), "single");
 
 %!test
-%!function y = Afun (x)
+%!function y = Afcn (x)
 %!  A = toeplitz ([2, 1, 0, 0], [2, -1, 0, 0]);
 %!  y = A * x;
 %!endfunction
-%! [x, flag] = tfqmr ("Afun", [1; 2; 2; 3]);
+%! [x, flag] = tfqmr ("Afcn", [1; 2; 2; 3]);
 %! assert (x, ones (4, 1), 1e-6);
 
 %!test # unpreconditioned residual
@@ -481,23 +481,23 @@
 %! [M1, M2] = ilu (A + 0.1 * eye (n));
 %! M = M1 * M2;
 %! x = tfqmr (A, b, [], n);
-%! Afun = @(x) A * x;
-%! x = tfqmr (Afun, b, [], n);
+%! Afcn = @(x) A * x;
+%! x = tfqmr (Afcn, b, [], n);
 %! x = tfqmr (A, b, 1e-6, n, M);
 %! x = tfqmr (A, b, 1e-6, n, M1, M2);
-%! Mfun = @(z) M \ z;
-%! x = tfqmr (Afun, b, 1e-6, n, Mfun);
-%! M1fun = @(z) M1 \ z;
-%! M2fun = @(z) M2 \ z;
-%! x = tfqmr (Afun, b, 1e-6, n, M1fun, M2fun);
+%! Mfcn = @(z) M \ z;
+%! x = tfqmr (Afcn, b, 1e-6, n, Mfcn);
+%! M1fcn = @(z) M1 \ z;
+%! M2fcn = @(z) M2 \ z;
+%! x = tfqmr (Afcn, b, 1e-6, n, M1fcn, M2fcn);
 %! function y = Ap (A, x, z) # compute A^z * x or (A^z)' * x
 %!    y = x;
 %!    for i = 1:z
 %!      y = A * y;
 %!    endfor
 %!  endfunction
-%! Afun = @(x, p) Ap (A, x, p);
-%! x = tfqmr (Afun, b, [], 2*n, [], [], [], 2); # solution of A^2 * x = b
+%! Afcn = @(x, p) Ap (A, x, p);
+%! x = tfqmr (Afcn, b, [], 2*n, [], [], [], 2); # solution of A^2 * x = b
 
 %!demo
 %! n = 10;
--- a/scripts/sparse/treelayout.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/sparse/treelayout.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,21 +24,21 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} treelayout (@var{tree})
-## @deftypefnx {} {} treelayout (@var{tree}, @var{permutation})
+## @deftypefn  {} {[@var{x}, @var{y}] =} treelayout (@var{tree})
+## @deftypefnx {} {[@var{x}, @var{y}] =} treelayout (@var{tree}, @var{permutation})
+## @deftypefnx {} {[@var{x}, @var{y}, @var{h}, @var{s}] =} treelayout (@dots{})
 ## treelayout lays out a tree or a forest.
 ##
 ## The first argument @var{tree} is a vector of predecessors.
 ##
-## The parameter @var{permutation} is an optional postorder permutation.
+## The optional parameter @var{permutation} is a postorder permutation.
 ##
 ## The complexity of the algorithm is O(n) in terms of time and memory
 ## requirements.
 ## @seealso{etreeplot, gplot, treeplot}
 ## @end deftypefn
 
-function [x_coordinate, y_coordinate, height, s] = ...
-                                                 treelayout (tree, permutation)
+function [x, y, h, s] = treelayout (tree, permutation)
 
   if (nargin < 1)
     print_usage ();
@@ -162,16 +162,16 @@
     ## If there is not any descendant of "parent node":
     if (stk(end,2) != par_number)
      left_most += 1;
-     x_coordinate_r(par_number) = left_most;
+     x_r(par_number) = left_most;
      max_ht = min (max_ht, level);
-     if (length (stk) > 1 && find ((shift (stk,1) - stk) == 0) > 1
+     if (length (stk) > 1 && find ((circshift (stk,1) - stk) == 0) > 1
          && stk(end,2) != stk(end-1,2))
         ## Return to the nearest branching the position to return
         ## position is the position on the stack, where should be
         ## started further search (there are two nodes which has the
         ## same parent node).
 
-        position = (find ((shift (stk(:,2), 1) - stk(:,2)) == 0))(end) + 1;
+        position = (find ((circshift (stk(:,2), 1) - stk(:,2)) == 0))(end) + 1;
         par_number_vec = stk(position:end,2);
 
         ## The vector of removed nodes (the content of stack form
@@ -181,7 +181,7 @@
 
         ## The level have to be decreased.
 
-        x_coordinate_r(par_number_vec) = left_most;
+        x_r(par_number_vec) = left_most;
         stk(position:end,:) = [];
       endif
 
@@ -192,8 +192,8 @@
       par_number = stk(end,1);
       ## If there is another branch start to search it.
       if (par_number != -1)
-        y_coordinate(par_number) = level;
-        x_coordinate_l(par_number) = left_most + 1;
+        y(par_number) = level;
+        x_l(par_number) = left_most + 1;
       endif
     else
 
@@ -201,16 +201,16 @@
       ## them and go on through it.
       level -= 1;
       par_number = stk(end,1);
-      y_coordinate(par_number) = level;
-      x_coordinate_l(par_number) = left_most + 1;
+      y(par_number) = level;
+      x_l(par_number) = left_most + 1;
     endif
   endwhile
 
   ## Calculate the x coordinates (the known values are the position
   ## of most left and most right descendants).
-  x_coordinate = (x_coordinate_l + x_coordinate_r) / 2;
+  x = (x_l + x_r) / 2;
 
-  height = num_nodes - max_ht - 1;
+  h = num_nodes - max_ht - 1;
 
 endfunction
 
--- a/scripts/sparse/treeplot.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/sparse/treeplot.m	Mon Aug 29 13:58:00 2022 +0200
@@ -127,13 +127,13 @@
       left_most += 1;
       x_coordinate_r(par_number) = left_most;
       max_ht = min (max_ht, level);
-      if (length (stk) > 1 && find ((shift (stk,1) - stk) == 0) > 1
+      if (length (stk) > 1 && find ((circshift (stk,1) - stk) == 0) > 1
           && stk(end,2) != stk(end-1,2))
         ## Return to the nearest branching the position to return
         ## position is the position on the stack, where should be
         ## started further search (there are two nodes which has the
         ## same parent node).
-        position = (find ((shift (stk(:,2),1) - stk(:,2)) == 0))(end) + 1;
+        position = (find ((circshift (stk(:,2),1) - stk(:,2)) == 0))(end) + 1;
         par_number_vec = stk(position:end,2);
         ## The vector of removed nodes (the content of stack form
         ## position to end).
--- a/scripts/specfun/beta.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/specfun/beta.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} beta (@var{a}, @var{b})
+## @deftypefn {} {@var{y} =} beta (@var{a}, @var{b})
 ## Compute the Beta function for real inputs @var{a} and @var{b}.
 ##
 ## The Beta function definition is
@@ -48,7 +48,7 @@
 ## @seealso{betaln, betainc, betaincinv}
 ## @end deftypefn
 
-function retval = beta (a, b)
+function y = beta (a, b)
 
   if (nargin != 2)
     print_usage ();
@@ -60,7 +60,7 @@
     error ("beta: A and B must have consistent sizes");
   endif
 
-  retval = real (exp (gammaln (a) + gammaln (b) - gammaln (a+b)));
+  y = real (exp (gammaln (a) + gammaln (b) - gammaln (a+b)));
 
 endfunction
 
--- a/scripts/specfun/betainc.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/specfun/betainc.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} betainc (@var{x}, @var{a}, @var{b})
-## @deftypefnx {} {} betainc (@var{x}, @var{a}, @var{b}, @var{tail})
+## @deftypefn  {} {@var{I} =} betainc (@var{x}, @var{a}, @var{b})
+## @deftypefnx {} {@var{I} =} betainc (@var{x}, @var{a}, @var{b}, @var{tail})
 ## Compute the incomplete beta function.
 ##
 ## This is defined as
@@ -72,7 +72,7 @@
 ## @seealso{beta, betaincinv, betaln}
 ## @end deftypefn
 
-function y = betainc (x, a, b, tail = "lower")
+function I = betainc (x, a, b, tail = "lower")
 
   if (nargin < 3)
     print_usage ();
@@ -115,7 +115,7 @@
 
   ## Convert to floating point if necessary
   if (isinteger (x))
-    y = double (x);
+    I = double (x);
   endif
   if (isinteger (a))
     a = double (a);
@@ -125,7 +125,7 @@
   endif
 
   ## Initialize output array
-  y = zeros (size (x), class (x));
+  I = zeros (size (x), class (x));
 
   ## Trivial cases (long code here trades memory for speed)
   a_one = (a == 1);
@@ -138,17 +138,17 @@
   b_one &= a_not_one;
 
   if (strcmpi (tail, "lower"))
-    y(a_b_one) = x(a_b_one);
+    I(a_b_one) = x(a_b_one);
     ## See bug #62329.
     ## equivalent to "1 - (1 - x(a_one)) .^ b(a_one)", but less roundoff error
-    y(a_one) = - expm1 (log1p (- x(a_one)) .* b(a_one));
-    y(b_one) = x(b_one) .^ a(b_one);
+    I(a_one) = - expm1 (log1p (- x(a_one)) .* b(a_one));
+    I(b_one) = x(b_one) .^ a(b_one);
   elseif (strcmpi (tail, "upper"))
-    y(a_b_one) = 1 - x(a_b_one);
+    I(a_b_one) = 1 - x(a_b_one);
     ## equivalent to "(1 - x(a_one)) .^ b(a_one)", but less roundoff error
-    y(a_one) = exp (log1p (- x(a_one)) .* b(a_one));
+    I(a_one) = exp (log1p (- x(a_one)) .* b(a_one));
     ## equivalent to "1 - x(b_one) .^ a(b_one)", but less roundoff error
-    y(b_one) = - expm1 (log (x(b_one)) .* a(b_one));
+    I(b_one) = - expm1 (log (x(b_one)) .* a(b_one));
   endif
 
   ## Non-Trivial cases
@@ -187,10 +187,10 @@
   y_nt = real (exp (y_nt));
   y_nt(fflag) = 1 - y_nt(fflag);
 
-  y(non_trivial) = y_nt;
+  I(non_trivial) = y_nt;
 
   ## Restore original shape
-  y = reshape (y, orig_sz);
+  I = reshape (I, orig_sz);
 
 endfunction
 
--- a/scripts/specfun/betaincinv.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/specfun/betaincinv.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,9 +24,9 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} betaincinv (@var{y}, @var{a}, @var{b})
-## @deftypefnx {} {} betaincinv (@var{y}, @var{a}, @var{b}, "lower")
-## @deftypefnx {} {} betaincinv (@var{y}, @var{a}, @var{b}, "upper")
+## @deftypefn  {} {@var{x} =} betaincinv (@var{y}, @var{a}, @var{b})
+## @deftypefnx {} {@var{x} =} betaincinv (@var{y}, @var{a}, @var{b}, "lower")
+## @deftypefnx {} {@var{x} =} betaincinv (@var{y}, @var{a}, @var{b}, "upper")
 ## Compute the inverse of the normalized incomplete beta function.
 ##
 ## The normalized incomplete beta function is defined as
--- a/scripts/specfun/betaln.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/specfun/betaln.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} betaln (@var{a}, @var{b})
+## @deftypefn {} {@var{lnb} =} betaln (@var{a}, @var{b})
 ## Compute the natural logarithm of the Beta function for real inputs @var{a}
 ## and @var{b}.
 ##
@@ -48,7 +48,7 @@
 ## @seealso{beta, betainc, betaincinv, gammaln}
 ## @end deftypefn
 
-function retval = betaln (a, b)
+function lnb = betaln (a, b)
 
   if (nargin != 2)
     print_usage ();
@@ -60,7 +60,7 @@
     error ("betaln: A and B must have consistent sizes");
   endif
 
-  retval = gammaln (a) + gammaln (b) - gammaln (a + b);
+  lnb = gammaln (a) + gammaln (b) - gammaln (a + b);
 
 endfunction
 
--- a/scripts/specfun/cosint.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/specfun/cosint.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} cosint (@var{x})
+## @deftypefn {} {@var{y} =} cosint (@var{x})
 ## Compute the cosine integral function:
 ## @tex
 ## $$
@@ -76,7 +76,7 @@
 
 function y = cosint (x)
 
-  if (nargin < 1)
+  if (nargin != 1)
     print_usage ();
   endif
 
--- a/scripts/specfun/expint.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/specfun/expint.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} expint (@var{x})
+## @deftypefn {} {@var{y} =} expint (@var{x})
 ## Compute the exponential integral.
 ##
 ## The exponential integral is defined as:
--- a/scripts/specfun/factorial.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/specfun/factorial.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,10 +24,12 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} factorial (@var{n})
+## @deftypefn {} {@var{f} =} factorial (@var{n})
 ## Return the factorial of @var{n} where @var{n} is a real non-negative
 ## integer.
 ##
+## @c FIXME: This documentation is wrong.  Apparently gamma() is used for
+## @c        calculations rather than prod().
 ## If @var{n} is a scalar, this is equivalent to @code{prod (1:@var{n})}.  For
 ## vector or matrix arguments, return the factorial of each element in the
 ## array.
@@ -39,7 +41,7 @@
 ## @seealso{prod, gamma, gammaln}
 ## @end deftypefn
 
-function x = factorial (n)
+function f = factorial (n)
 
   if (nargin < 1)
     print_usage ();
@@ -47,14 +49,14 @@
     error ("factorial: all N must be real non-negative integers");
   endif
 
-  x = round (gamma (n+1));
+  f = round (gamma (n+1));
 
   ## FIXME: Matlab returns an output of the same type as the input.
   ## This doesn't seem particularly worth copying--for example uint8 would
   ## saturate for n > 5.  If desired, however, the following code could be
   ## uncommented.
-  ## if (! isfloat (x))
-  ##   x = cast (x, class (n));
+  ## if (! isfloat (f))
+  ##   f = cast (f, class (n));
   ## endif
 
 endfunction
--- a/scripts/specfun/gammainc.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/specfun/gammainc.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} gammainc (@var{x}, @var{a})
-## @deftypefnx {} {} gammainc (@var{x}, @var{a}, @var{tail})
+## @deftypefn  {} {@var{y} =} gammainc (@var{x}, @var{a})
+## @deftypefnx {} {@var{y} =} gammainc (@var{x}, @var{a}, @var{tail})
 ## Compute the normalized incomplete gamma function.
 ##
 ## This is defined as
--- a/scripts/specfun/gammaincinv.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/specfun/gammaincinv.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} gammaincinv (@var{y}, @var{a})
-## @deftypefnx {} {} gammaincinv (@var{y}, @var{a}, @var{tail})
+## @deftypefn  {} {@var{x} =} gammaincinv (@var{y}, @var{a})
+## @deftypefnx {} {@var{x} =} gammaincinv (@var{y}, @var{a}, @var{tail})
 ## Compute the inverse of the normalized incomplete gamma function.
 ##
 ## The normalized incomplete gamma function is defined as
--- a/scripts/specfun/isprime.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/specfun/isprime.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} isprime (@var{x})
+## @deftypefn {} {@var{tf} =} isprime (@var{x})
 ## Return a logical array which is true where the elements of @var{x} are prime
 ## numbers and false where they are not.
 ##
@@ -72,7 +72,7 @@
 ## @seealso{primes, factor, gcd, lcm}
 ## @end deftypefn
 
-function t = isprime (x)
+function tf = isprime (x)
 
   if (nargin < 1)
     print_usage ();
@@ -81,12 +81,12 @@
   endif
 
   if (isempty (x))
-    t = x;
+    tf = x;
     return;
   endif
 
   if (iscomplex (x))
-    t = isgaussianprime (x);
+    tf = isgaussianprime (x);
     return;
   endif
 
@@ -101,7 +101,7 @@
   ## because of the method used by __isprimelarge__ below.
   maxp = 37;
   pr = [2 3 5 7 11 13 17 19 23 29 31 37];
-  t = lookup (pr, x, "b");  # quick search for table matches.
+  tf = lookup (pr, x, "b");  # quick search for table matches.
 
   THRESHOLD = 195e8;
   ## FIXME: THRESHOLD is the input value at which Miller-Rabin
@@ -141,7 +141,7 @@
     ## Start by dividing through by the small primes until the remaining list
     ## of entries is small (and most likely prime themselves).
     pr2 = primes (sqrt (max (m)));
-    t |= lookup (pr2, x, "b");
+    tf |= lookup (pr2, x, "b");
     for p = pr2
       m = m(rem (m, p) != 0);
       if (numel (m) < numel (pr) / 10)
@@ -158,20 +158,20 @@
 
     ## Add any remaining entries, which are truly prime, to the results.
     if ( ! isempty (m))
-      t |= lookup (sort (m), x, "b");
+      tf |= lookup (sort (m), x, "b");
     endif
   endif
 
   ## Process remaining entries (everything above THRESHOLD) with Miller-Rabin
   ii = (x(:)' > THRESHOLD);
-  t(ii) = __isprimelarge__ (x(ii));
+  tf(ii) = __isprimelarge__ (x(ii));
 
 endfunction
 
-function t = isgaussianprime (z)
+function tf = isgaussianprime (z)
 
   ## Assume prime unless proven otherwise
-  t = true (size (z));
+  tf = true (size (z));
 
   x = real (z);
   y = imag (z);
@@ -181,13 +181,13 @@
   xidx = y==0 & mod (x, 4) == 3;
   yidx = x==0 & mod (y, 4) == 3;
 
-  t(xidx) &= isprime (x(xidx));
-  t(yidx) &= isprime (y(yidx));
+  tf(xidx) &= isprime (x(xidx));
+  tf(yidx) &= isprime (y(yidx));
 
   ## Otherwise, prime if x^2 + y^2 is prime
   zidx = ! (xidx | yidx);          # Skip entries that were already evaluated
   zabs = x(zidx).^2 + y(zidx).^2;
-  t(zidx) &= isprime (zabs);
+  tf(zidx) &= isprime (zabs);
 
 endfunction
 
--- a/scripts/specfun/lcm.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/specfun/lcm.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} lcm (@var{x}, @var{y})
-## @deftypefnx {} {} lcm (@var{x}, @var{y}, @dots{})
+## @deftypefn  {} {@var{l} =} lcm (@var{x}, @var{y})
+## @deftypefnx {} {@var{l} =} lcm (@var{x}, @var{y}, @dots{})
 ## Compute the least common multiple of @var{x} and @var{y}, or of the list of
 ## all arguments.
 ##
--- a/scripts/specfun/module.mk	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/specfun/module.mk	Mon Aug 29 13:58:00 2022 +0200
@@ -19,7 +19,6 @@
   %reldir%/nchoosek.m \
   %reldir%/nthroot.m \
   %reldir%/perms.m \
-  %reldir%/pow2.m \
   %reldir%/primes.m \
   %reldir%/reallog.m \
   %reldir%/realpow.m \
--- a/scripts/specfun/nthroot.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/specfun/nthroot.m	Mon Aug 29 13:58:00 2022 +0200
@@ -27,7 +27,7 @@
 ## public domain.
 
 ## -*- texinfo -*-
-## @deftypefn {} {} nthroot (@var{x}, @var{n})
+## @deftypefn {} {@var{y} =} nthroot (@var{x}, @var{n})
 ##
 ## Compute the real (non-complex) @var{n}-th root of @var{x}.
 ##
--- a/scripts/specfun/perms.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/specfun/perms.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,15 +24,19 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} perms (@var{v})
+## @deftypefn  {} {@var{P} =} perms (@var{v})
+## @deftypefnx {} {@var{P} =} perms (@var{v}, "unique")
 ## Generate all permutations of vector @var{v} with one row per permutation.
 ##
 ## Results are returned in inverse lexicographic order.  The result has size
 ## @code{factorial (@var{n}) * @var{n}}, where @var{n} is the length of
-## @var{v}.  Any repetitions are included in the output.  To generate just the
-## unique permutations use @code{unique (perms (@var{v}), "rows")(end:-1:1,:)}.
+## @var{v}.  Any repeated elements are included in the output.
 ##
-## Example
+## If the optional argument @qcode{"unique"} is given then only unique
+## permutations are returned, using less memory and generally taking less time
+## than calling @code{unique (perms (@var{v}), "rows")}.
+##
+## Example 1
 ##
 ## @example
 ## @group
@@ -47,8 +51,25 @@
 ## @end group
 ## @end example
 ##
-## Programming Note: The maximum length of @var{v} should be less than or
-## equal to 10 to limit memory consumption.
+## Example 2
+##
+## @example
+## @group
+## perms ([1, 1, 2, 2], "unique")
+## @result{}
+##   1   1   2   2
+##   1   2   1   2
+##   1   2   2   1
+##   2   1   1   2
+##   2   1   2   1
+##   2   2   1   1
+## @end group
+## @end example
+##
+## Programming Note: If the @qcode{"unique"} option is not used, the length of
+## @var{v} should be no more than 10-12 to limit memory consumption.  Even with
+## @qcode{"unique"}, there should be no more than 10-12 unique elements in
+## @var{v}.
 ## @seealso{permute, randperm, nchoosek}
 ## @end deftypefn
 
@@ -56,32 +77,45 @@
 ## type.  However, benchmarking shows doubles are faster.  If this changes in
 ## a later version of Octave the index variables here can be made uint8.
 
-function A = perms (v)
+function P = perms (v, opt)
 
   if (nargin < 1)
     print_usage ();
   endif
 
-  v = v(:).';
+  unique_v = false;
+  if (nargin == 2)
+    if (! strcmpi (opt, "unique"))
+      error ('perms: option must be the string "unique"');
+    endif
+    unique_v = true;
+  endif
+
+  v = v(:).';  # convert to row vector
   if (isnumeric (v) || ischar (v))
     ## Order of output is only dependent on the actual values for
     ## character and numeric arrays.
     v = sort (v, "ascend");
   endif
+
   n = numel (v);
-
   if (n < 4)    # special cases for small n
     switch (n)
       case 0
-        A = reshape (v, 1, 0);
+        P = reshape (v, 1, 0);
       case 1
-        A = v;
+        P = v;
       case 2
-        A = [v([2 1]);v];
+        P = [v([2 1]);v];
       case 3
-        A = v([3 2 1; 3 1 2; 2 3 1; 2 1 3; 1 3 2; 1 2 3]);
+        P = v([3 2 1; 3 1 2; 2 3 1; 2 1 3; 1 3 2; 1 2 3]);
     endswitch
-  else
+    if (unique_v)
+      P = unique (P, "rows");
+    endif
+
+  elseif (! unique_v)
+    ## FIXME: Brief explanation of the algorithm being used would be useful.
     v = v(end:-1:1);
     n-= 1;
 
@@ -93,7 +127,7 @@
       f *= j;
       perm = idx(1:f, n-(j-1):n);
       idx(1:(j+1)*f, n-j) = (n-j:n)(ones (f, 1),:)(:);
-      for i=0:j
+      for i = 0:j
         b(i+n-j) -= 1;
         idx((1:f)+i*f, n-(j-1):n) = b(perm);
       endfor
@@ -101,13 +135,45 @@
 
     n += 1;
     f *= n-1;
-    A = v(1)(ones (factorial (n), n));
-    A(:,1) = v(ones (f, 1),:)(:);
+    P = v(1)(ones (factorial (n), n));
+    P(:,1) = v(ones (f, 1),:)(:);
 
     for i = 1:n
       b = v([1:i-1 i+1:n]);
-      A((1:f)+(i-1)*f, 2:end) = b(idx);
+      P((1:f)+(i-1)*f, 2:end) = b(idx);
     endfor
+
+  else  # unique permutations
+    [v, ~, j] = unique (v);
+    h = accumarray (j, 1)';
+    idx = m_perms (h);
+    P = v(sortrows (idx'));
+  endif
+
+endfunction
+
+function out_perms = m_perms (multis)
+  ## FIXME: Brief explanation of the algorithm being used would be useful.
+
+  l = numel (multis);
+  if (l == 1)
+    out_perms = uint8 (ones (multis, 1));
+  else
+    p1 = m_perms (multis (1:floor (l/2)));
+    p2 = m_perms (multis (floor (l/2+1):l)) + max (p1(:, 1));
+    l1 = rows (p1);
+    l2 = rows (p2);
+    cp1 = columns (p1);
+    cp2 = columns (p2);
+
+    p = nchoosek (1:l1+l2, l1);
+    rp = rows (p);
+
+    ii = false (l1+l2, rp);
+    ii(p + (0:rp - 1)' * (l1 + l2)) = true;
+    out_perms = zeros (l1 + l2, cp1 * cp2 * rp, "uint8");
+    out_perms(repmat ( ii, cp1 * cp2, 1)(:)) = repmat (p1, cp2, rp)(:);
+    out_perms(repmat (!ii, cp1 * cp2, 1)(:)) = repmat (p2, 1, cp1 * rp)(:);
   endif
 
 endfunction
@@ -123,10 +189,12 @@
 %!assert (unique (perms (1:5)(:))', 1:5)
 %!assert (perms (int8 (1:4)), int8 (perms (1:4)))
 
-%!error <Invalid call> perms ()
+%!assert (sortrows (perms ("abb", "unique")), ["abb"; "bab"; "bba"]);
+%!assert (size (perms ([1 1 1 1 2 2 2 3 3], "unique")), [1260 9])
+%!assert (size (perms (int8([1 1 1 1 1 2 2 2 2 3 3 3]), "unique")), [27720 12])
 
-## Should work for any array type, such as cells and structs, and not
-## only for numeric data.
+## Should work for any array type, such as cells and structs,
+## and not only for numeric data.
 
 %!assert <*52431> (perms ({1}), {1})
 %!assert <*52431> (perms ({0.1, "foo"}), {"foo", 0.1; 0.1, "foo"})
@@ -162,3 +230,9 @@
 %! s(1) = [];
 %! assert (perms (reshape (s, 0, 0)), reshape (s, 1, 0));
 %! assert (perms (reshape (s, 0, 1)), reshape (s, 1, 0));
+
+## Test input validation
+%!error <Invalid call> perms ()
+%!error <option must be the string "unique"> perms (1:5, "foobar")
+%!error <option must be the string "unique"> perms (1:5, {"foo"})
+
--- a/scripts/specfun/pow2.m	Sun Aug 28 22:44:49 2022 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,74 +0,0 @@
-########################################################################
-##
-## Copyright (C) 1995-2022 The Octave Project Developers
-##
-## See the file COPYRIGHT.md in the top-level directory of this
-## distribution or <https://octave.org/copyright/>.
-##
-## This file is part of Octave.
-##
-## Octave is free software: you can redistribute it and/or modify it
-## under the terms of the GNU General Public License as published by
-## the Free Software Foundation, either version 3 of the License, or
-## (at your option) any later version.
-##
-## Octave is distributed in the hope that it will be useful, but
-## WITHOUT ANY WARRANTY; without even the implied warranty of
-## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-## GNU General Public License for more details.
-##
-## You should have received a copy of the GNU General Public License
-## along with Octave; see the file COPYING.  If not, see
-## <https://www.gnu.org/licenses/>.
-##
-########################################################################
-
-## -*- texinfo -*-
-## @deftypefn  {} {} pow2 (@var{x})
-## @deftypefnx {} {} pow2 (@var{f}, @var{e})
-## With one input argument, compute
-## @tex
-## $2^x$
-## @end tex
-## @ifnottex
-## 2 .^ x
-## @end ifnottex
-## for each element of @var{x}.
-##
-## With two input arguments, return
-## @tex
-## $f \cdot 2^e$.
-## @end tex
-## @ifnottex
-## f .* (2 .^ e).
-## @end ifnottex
-## @seealso{log2, nextpow2, power}
-## @end deftypefn
-
-function y = pow2 (f, e)
-
-  if (nargin < 1)
-    print_usage ();
-  endif
-
-  if (nargin == 1)
-    y = 2 .^ f;
-  else
-    y = f .* (2 .^ e);
-  endif
-
-endfunction
-
-
-%!test
-%! x = [3, 0, -3];
-%! v = [8, 1, .125];
-%! assert (pow2 (x), v, sqrt (eps));
-
-%!test
-%! x = [3, 0, -3, 4, 0, -4, 5, 0, -5];
-%! y = [-2, -2, -2, 1, 1, 1, 3, 3, 3];
-%! z = x .* (2 .^ y);
-%! assert (pow2 (x,y), z, sqrt (eps));
-
-%!error <Invalid call> pow2 ()
--- a/scripts/specfun/reallog.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/specfun/reallog.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} reallog (@var{x})
+## @deftypefn {} {@var{y} =} reallog (@var{x})
 ## Return the real-valued natural logarithm of each element of @var{x}.
 ##
 ## If any element results in a complex return value @code{reallog} aborts and
--- a/scripts/specfun/realpow.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/specfun/realpow.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} realpow (@var{x}, @var{y})
+## @deftypefn {} {@var{z} =} realpow (@var{x}, @var{y})
 ## Compute the real-valued, element-by-element power operator.
 ##
 ## This is equivalent to @w{@code{@var{x} .^ @var{y}}}, except that
--- a/scripts/specfun/realsqrt.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/specfun/realsqrt.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} realsqrt (@var{x})
+## @deftypefn {} {@var{y} =} realsqrt (@var{x})
 ## Return the real-valued square root of each element of @var{x}.
 ##
 ## If any element results in a complex return value @code{realsqrt} aborts and
--- a/scripts/specfun/sinint.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/specfun/sinint.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} sinint (@var{x})
+## @deftypefn {} {@var{y} =} sinint (@var{x})
 ## Compute the sine integral function:
 ## @tex
 ## $$
--- a/scripts/special-matrix/hadamard.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/special-matrix/hadamard.m	Mon Aug 29 13:58:00 2022 +0200
@@ -27,7 +27,7 @@
 ## public domain.
 
 ## -*- texinfo -*-
-## @deftypefn {} {} hadamard (@var{n})
+## @deftypefn {} {@var{h} =} hadamard (@var{n})
 ## Construct a Hadamard matrix (@nospell{Hn}) of size @var{n}-by-@var{n}.
 ##
 ## The size @var{n} must be of the form @math{2^k * p} in which p is one of
--- a/scripts/special-matrix/hankel.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/special-matrix/hankel.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} hankel (@var{c})
-## @deftypefnx {} {} hankel (@var{c}, @var{r})
+## @deftypefn  {} {@var{h} =} hankel (@var{c})
+## @deftypefnx {} {@var{h} =} hankel (@var{c}, @var{r})
 ## Return the Hankel matrix constructed from the first column @var{c}, and
 ## (optionally) the last row @var{r}.
 ##
@@ -54,7 +54,7 @@
 ## @seealso{hadamard, toeplitz}
 ## @end deftypefn
 
-function retval = hankel (c, r)
+function h = hankel (c, r)
 
   if (nargin < 1)
     print_usage ();
@@ -85,7 +85,7 @@
   endif
 
   slices = cellslices (data, 1:nc, nr:1:nc+nr-1);
-  retval = horzcat (slices{:});
+  h = horzcat (slices{:});
 
 endfunction
 
--- a/scripts/special-matrix/hilb.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/special-matrix/hilb.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} hilb (@var{n})
+## @deftypefn {} {@var{h} =} hilb (@var{n})
 ## Return the Hilbert matrix of order @var{n}.
 ##
 ## The @math{i,j} element of a Hilbert matrix is defined as
@@ -58,9 +58,9 @@
 ## @seealso{invhilb}
 ## @end deftypefn
 
-function retval = hilb (n)
+function h = hilb (n)
 
-  if (nargin < 1)
+  if (nargin != 1)
     print_usage ();
   elseif (! isscalar (n))
     error ("hilb: N must be a scalar integer");
@@ -69,7 +69,7 @@
   ## Very elegant solution by N. Higham
   ## https://nhigham.com/2020/06/30/what-is-the-hilbert-matrix/
   j = 1:n;
-  retval = 1 ./ (j' + j - 1);
+  h = 1 ./ (j' + j - 1);
 
 endfunction
 
--- a/scripts/special-matrix/invhilb.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/special-matrix/invhilb.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} invhilb (@var{n})
+## @deftypefn {} {@var{hinv} =} invhilb (@var{n})
 ## Return the inverse of the Hilbert matrix of order @var{n}.
 ##
 ## This can be computed exactly using
@@ -79,7 +79,7 @@
 ## @seealso{hilb}
 ## @end deftypefn
 
-function retval = invhilb (n)
+function hinv = invhilb (n)
 
   if (nargin < 1)
     print_usage ();
@@ -101,17 +101,17 @@
   ## However, it rounds the answer to the nearest integer, which
   ## justifies the claim about exactness made above.
 
-  retval = zeros (n);
+  hinv = zeros (n);
   k = [1:n];
   p = k .* bincoeff (k+n-1, k-1) .* bincoeff (n, k);
   p(2:2:n) = -p(2:2:n);
   if (n < 203)
     for l = 1:n
-      retval(l,:) = (p(l) * p) ./ [l:l+n-1];
+      hinv(l,:) = (p(l) * p) ./ [l:l+n-1];
     endfor
   else
     for l = 1:n
-      retval(l,:) = p(l) * (p ./ [l:l+n-1]);
+      hinv(l,:) = p(l) * (p ./ [l:l+n-1]);
     endfor
   endif
 
--- a/scripts/special-matrix/magic.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/special-matrix/magic.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} magic (@var{n})
+## @deftypefn {} {@var{M} =} magic (@var{n})
 ##
 ## Create an @var{n}-by-@var{n} magic square.
 ##
@@ -36,7 +36,7 @@
 ## degenerate magic squares 1 and [].
 ## @end deftypefn
 
-function A = magic (n)
+function M = magic (n)
 
   if (nargin < 1)
     print_usage ();
@@ -46,40 +46,40 @@
   if (n < 0)
     error ("magic: N must be non-negative");
   elseif (n < 1)
-    A = [];
+    M = [];
   elseif (mod (n, 2) == 1)
 
     shift = floor ((0:n*n-1)/n);
     c = mod ([1:n*n] - shift + (n-3)/2, n);
     r = mod ([n*n:-1:1] + 2*shift, n);
-    A(c*n+r+1) = 1:n*n;
-    A = reshape (A, n, n);
+    M(c*n+r+1) = 1:n*n;
+    M = reshape (M, n, n);
 
   elseif (mod (n, 4) == 0)
 
-    A = reshape (1:n*n, n, n)';
+    M = reshape (1:n*n, n, n)';
     I = [1:4:n, 4:4:n];
     J = fliplr (I);
-    A(I,I) = A(J,J);
+    M(I,I) = M(J,J);
     I = [2:4:n, 3:4:n];
     J = fliplr (I);
-    A(I,I) = A(J,J);
+    M(I,I) = M(J,J);
 
   elseif (mod (n, 4) == 2)
 
     m = n/2;
-    A = magic (m);
-    A = [A, A+2*m*m; A+3*m*m, A+m*m];
+    M = magic (m);
+    M = [M, M+2*m*m; M+3*m*m, M+m*m];
     k = (m-1)/2;
     if (k > 1)
       I = 1:m;
       J = [2:k, n-k+2:n];
-      A([I,I+m],J) = A([I+m,I],J);
+      M([I,I+m],J) = M([I+m,I],J);
     endif
     I = [1:k, k+2:m];
-    A([I,I+m],1) = A([I+m,I],1);
+    M([I,I+m],1) = M([I+m,I],1);
     I = k + 1;
-    A([I,I+m],I) = A([I+m,I],I);
+    M([I,I+m],I) = M([I+m,I],I);
 
   endif
 
--- a/scripts/special-matrix/pascal.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/special-matrix/pascal.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} pascal (@var{n})
-## @deftypefnx {} {} pascal (@var{n}, @var{t})
+## @deftypefn  {} {@var{P} =} pascal (@var{n})
+## @deftypefnx {} {@var{P} =} pascal (@var{n}, @var{t})
 ## Return the Pascal matrix of order @var{n} if @code{@var{t} = 0}.
 ##
 ## The default value of @var{t} is 0.
@@ -45,7 +45,7 @@
 ## @seealso{chol}
 ## @end deftypefn
 
-function retval = pascal (n, t = 0)
+function P = pascal (n, t = 0)
 
   if (nargin < 1)
     print_usage ();
@@ -55,27 +55,27 @@
     error ("pascal: T must be -1, 0, 1, or 2, found %d", t);
   endif
 
-  retval = zeros (n);
+  P = zeros (n);
   if (n > 0)
-    retval(:,1) = 1;
+    P(:,1) = 1;
   endif
 
   if (t == -1)
     for j = 2:n
-      retval(j:n,j) = cumsum (retval(j-1:n-1,j-1));
+      P(j:n,j) = cumsum (P(j-1:n-1,j-1));
     endfor
   else
     for j = 2:n
-      retval(j:n,j) = -cumsum (retval(j-1:n-1,j-1));
+      P(j:n,j) = -cumsum (P(j-1:n-1,j-1));
     endfor
   endif
 
   if (t == 0)
-    retval = retval*retval';
+    P = P*P';
   elseif (t == 2)
-    retval = rot90 (retval, 3);
+    P = rot90 (P, 3);
     if (rem (n,2) != 1)
-      retval *= -1;
+      P *= -1;
     endif
   endif
 
--- a/scripts/special-matrix/rosser.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/special-matrix/rosser.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,23 +24,23 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} rosser ()
+## @deftypefn {} {@var{R} =} rosser ()
 ## Return the @nospell{Rosser} matrix.
 ##
 ## This is a difficult test case used to evaluate eigenvalue algorithms.
 ## @seealso{wilkinson, eig}
 ## @end deftypefn
 
-function retval = rosser ()
+function R = rosser ()
 
-  retval = [611,   196,  -192,   407,    -8,   -52,   -49,    29;
-            196,   899,   113,  -192,   -71,   -43,    -8,   -44;
-           -192,   113,   899,   196,    61,    49,     8,    52;
-            407,  -192,   196,   611,     8,    44,    59,   -23;
-             -8,   -71,    61,     8,   411,  -599,   208,   208;
-            -52,   -43,    49,    44,  -599,   411,   208,   208;
-            -49,    -8,     8,    59,   208,   208,    99,  -911;
-             29,   -44,    52,   -23,   208,   208,  -911,    99];
+  R = [611,   196,  -192,   407,    -8,   -52,   -49,    29;
+       196,   899,   113,  -192,   -71,   -43,    -8,   -44;
+      -192,   113,   899,   196,    61,    49,     8,    52;
+       407,  -192,   196,   611,     8,    44,    59,   -23;
+        -8,   -71,    61,     8,   411,  -599,   208,   208;
+       -52,   -43,    49,    44,  -599,   411,   208,   208;
+       -49,    -8,     8,    59,   208,   208,    99,  -911;
+        29,   -44,    52,   -23,   208,   208,  -911,    99];
 
 endfunction
 
--- a/scripts/special-matrix/toeplitz.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/special-matrix/toeplitz.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} toeplitz (@var{c})
-## @deftypefnx {} {} toeplitz (@var{c}, @var{r})
+## @deftypefn  {} {@var{T} =} toeplitz (@var{c})
+## @deftypefnx {} {@var{T} =} toeplitz (@var{c}, @var{r})
 ## Return the Toeplitz matrix constructed from the first column @var{c},
 ## and optionally the first row @var{r}.
 ##
@@ -63,7 +63,7 @@
 ## @seealso{hankel}
 ## @end deftypefn
 
-function retval = toeplitz (c, r)
+function T = toeplitz (c, r)
 
   if (nargin < 1)
     print_usage ();
@@ -90,7 +90,7 @@
 
   if (nr == 0 || nc == 0)
     ## Empty matrix.
-    retval = zeros (nr, nc, class (c));
+    T = zeros (nr, nc, class (c));
     return;
   endif
 
@@ -112,8 +112,8 @@
     ridx = ridx(ridx > 1);
 
     ## Form matrix.
-    retval = spdiags (repmat (c(cidx),nr,1),1-cidx,nr,nc) + ...
-             spdiags (repmat (r(ridx),nr,1),ridx-1,nr,nc);
+    T = spdiags (repmat (c(cidx),nr,1),1-cidx,nr,nc) + ...
+                 spdiags (repmat (r(ridx),nr,1),ridx-1,nr,nc);
   else
     ## Concatenate data into a single column vector.
     data = [r(end:-1:2)(:); c(:)];
@@ -122,7 +122,7 @@
     slices = cellslices (data, nc:-1:1, nc+nr-1:-1:nr);
 
     ## Form matrix.
-    retval = horzcat (slices{:});
+    T = horzcat (slices{:});
   endif
 
 endfunction
--- a/scripts/special-matrix/vander.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/special-matrix/vander.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} vander (@var{c})
-## @deftypefnx {} {} vander (@var{c}, @var{n})
+## @deftypefn  {} {@var{V} =} vander (@var{c})
+## @deftypefnx {} {@var{V} =} vander (@var{c}, @var{n})
 ## Return the @nospell{Vandermonde} matrix whose next to last column is
 ## @var{c}.
 ##
@@ -58,11 +58,9 @@
 ## @seealso{polyfit}
 ## @end deftypefn
 
-function retval = vander (c, n)
+function V = vander (c, n)
 
-  if (nargin == 1)
-    n = length (c);
-  elseif (nargin != 2)
+  if (nargin < 1)
     print_usage ();
   endif
 
@@ -70,12 +68,18 @@
     error ("vander: polynomial C must be a vector");
   endif
 
+  if (nargin == 1)
+    n = length (c);
+  elseif (! isscalar (n))
+    error ("vander: N must be a positive scalar integer");
+  endif
+
   ## avoiding many ^s appears to be faster for n >= 100.
-  retval = zeros (length (c), n, class (c));
+  V = zeros (numel (c), n, class (c));
+  c = c(:);
   d = 1;
-  c = c(:);
   for i = n:-1:1
-    retval(:,i) = d;
+    V(:,i) = d;
     d .*= c;
   endfor
 
@@ -95,5 +99,7 @@
 %!assert (vander (2, 3), [4, 2, 1])
 %!assert (vander ([2, 3], 3), [4, 2, 1; 9, 3, 1])
 
+## Test input validation
 %!error <Invalid call> vander ()
 %!error <polynomial C must be a vector> vander ([1, 2; 3, 4])
+%!error <N must be a positive scalar integer> vander (1, [1, 2])
--- a/scripts/special-matrix/wilkinson.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/special-matrix/wilkinson.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} wilkinson (@var{n})
+## @deftypefn {} {@var{W} =} wilkinson (@var{n})
 ## Return the Wilkinson matrix of order @var{n}.
 ##
 ## Wilkinson matrices are symmetric and tridiagonal with pairs of nearly, but
@@ -34,7 +34,7 @@
 ## @seealso{rosser, eig}
 ## @end deftypefn
 
-function retval = wilkinson (n)
+function W = wilkinson (n)
 
   if (nargin < 1)
     print_usage ();
@@ -46,7 +46,7 @@
 
   side = ones (n-1, 1);
   center = abs (-(n-1)/2:(n-1)/2);
-  retval = diag (side, -1) + diag (center) + diag (side, 1);
+  W = diag (side, -1) + diag (center) + diag (side, 1);
 
 endfunction
 
--- a/scripts/statistics/center.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/statistics/center.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} center (@var{x})
-## @deftypefnx {} {} center (@var{x}, @var{dim})
+## @deftypefn  {} {@var{y} =} center (@var{x})
+## @deftypefnx {} {@var{y} =} center (@var{x}, @var{dim})
 ## Center data by subtracting its mean.
 ##
 ## If @var{x} is a vector, subtract its mean.
@@ -42,7 +42,7 @@
 ## @seealso{zscore}
 ## @end deftypefn
 
-function retval = center (x, dim)
+function y = center (x, dim)
 
   if (nargin < 1)
     print_usage ();
@@ -70,12 +70,12 @@
   n = size (x, dim);
 
   if (n == 0)
-    retval = x;
+    y = x;
   else
     ## FIXME: Use bsxfun, rather than broadcasting, until broadcasting
     ##        supports diagonal and sparse matrices (Bugs #41441, #35787).
-    retval = bsxfun (@minus, x, mean (x, dim));
-    ## retval = x - mean (x, dim);   # automatic broadcasting
+    y = bsxfun (@minus, x, mean (x, dim));
+    ## y = x - mean (x, dim);   # automatic broadcasting
   endif
 
 endfunction
--- a/scripts/statistics/corr.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/statistics/corr.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} corr (@var{x})
-## @deftypefnx {} {} corr (@var{x}, @var{y})
+## @deftypefn  {} {@var{r} =} corr (@var{x})
+## @deftypefnx {} {@var{r} =} corr (@var{x}, @var{y})
 ## Compute matrix of correlation coefficients.
 ##
 ## If each row of @var{x} and @var{y} is an observation and each column is
@@ -49,7 +49,7 @@
 ## @seealso{cov}
 ## @end deftypefn
 
-function retval = corr (x, y = [])
+function r = corr (x, y = [])
 
   if (nargin < 1)
     print_usage ();
@@ -60,9 +60,9 @@
   ## Special case, scalar is always 100% correlated with itself
   if (isscalar (x))
     if (isa (x, "single"))
-      retval = single (1);
+      r = single (1);
     else
-      retval = 1;
+      r = 1;
     endif
     return;
   endif
@@ -72,11 +72,11 @@
   if (nargin == 2)
     c = cov (x, y);
     s = std (x)' * std (y);
-    retval = c ./ s;
+    r = c ./ s;
   else
     c = cov (x);
     s = sqrt (diag (c));
-    retval = c ./ (s * s');
+    r = c ./ (s * s');
   endif
 
 endfunction
--- a/scripts/statistics/cov.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/statistics/cov.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,10 +24,10 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} cov (@var{x})
-## @deftypefnx {} {} cov (@var{x}, @var{opt})
-## @deftypefnx {} {} cov (@var{x}, @var{y})
-## @deftypefnx {} {} cov (@var{x}, @var{y}, @var{opt})
+## @deftypefn  {} {@var{c} =} cov (@var{x})
+## @deftypefnx {} {@var{c} =} cov (@var{x}, @var{opt})
+## @deftypefnx {} {@var{c} =} cov (@var{x}, @var{y})
+## @deftypefnx {} {@var{c} =} cov (@var{x}, @var{y}, @var{opt})
 ## Compute the covariance matrix.
 ##
 ## If each row of @var{x} and @var{y} is an observation, and each column is
--- a/scripts/statistics/discrete_cdf.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/statistics/discrete_cdf.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} discrete_cdf (@var{x}, @var{v}, @var{p})
+## @deftypefn {} {@var{cdf} =} discrete_cdf (@var{x}, @var{v}, @var{p})
 ## For each element of @var{x}, compute the cumulative distribution function
 ## (CDF) at @var{x} of a univariate discrete distribution which assumes the
 ## values in @var{v} with probabilities @var{p}.
--- a/scripts/statistics/discrete_inv.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/statistics/discrete_inv.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,13 +24,13 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} discrete_inv (@var{x}, @var{v}, @var{p})
+## @deftypefn {} {@var{q} =} discrete_inv (@var{x}, @var{v}, @var{p})
 ## For each element of @var{x}, compute the quantile (the inverse of the CDF)
 ## at @var{x} of the univariate distribution which assumes the values in
 ## @var{v} with probabilities @var{p}.
 ## @end deftypefn
 
-function inv = discrete_inv (x, v, p)
+function q = discrete_inv (x, v, p)
 
   if (nargin != 3)
     print_usage ();
@@ -47,9 +47,9 @@
   endif
 
   if (isa (x, "single") || isa (v, "single") || isa (p, "single"))
-    inv = NaN (size (x), "single");
+    q = NaN (size (x), "single");
   else
-    inv = NaN (size (x));
+    q = NaN (size (x));
   endif
 
   ## FIXME: This isn't elegant.  But cumsum and lookup together produce
@@ -62,13 +62,13 @@
   p = cumsum (p(idx)(:)) / sum (p);  # Reshape and normalize probability vector
 
   k = (x == 0);
-  inv(k) = v(1);
+  q(k) = v(1);
 
   k = (x == 1);
-  inv(k) = v(end);
+  q(k) = v(end);
 
   k = (x > 0) & (x < 1);
-  inv(k) = v(length (p) - lookup (sort (p, "descend"), x(k)) + 1);
+  q(k) = v(length (p) - lookup (sort (p, "descend"), x(k)) + 1);
 
 endfunction
 
--- a/scripts/statistics/discrete_pdf.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/statistics/discrete_pdf.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} discrete_pdf (@var{x}, @var{v}, @var{p})
+## @deftypefn {} {@var{pdf} =} discrete_pdf (@var{x}, @var{v}, @var{p})
 ## For each element of @var{x}, compute the probability density function (PDF)
 ## at @var{x} of a univariate discrete distribution which assumes the values
 ## in @var{v} with probabilities @var{p}.
--- a/scripts/statistics/discrete_rnd.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/statistics/discrete_rnd.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,10 +24,10 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} discrete_rnd (@var{v}, @var{p})
-## @deftypefnx {} {} discrete_rnd (@var{v}, @var{p}, @var{r})
-## @deftypefnx {} {} discrete_rnd (@var{v}, @var{p}, @var{r}, @var{c}, @dots{})
-## @deftypefnx {} {} discrete_rnd (@var{v}, @var{p}, [@var{sz}])
+## @deftypefn  {} {@var{rnd} =} discrete_rnd (@var{v}, @var{p})
+## @deftypefnx {} {@var{rnd} =} discrete_rnd (@var{v}, @var{p}, @var{r})
+## @deftypefnx {} {@var{rnd} =} discrete_rnd (@var{v}, @var{p}, @var{r}, @var{c}, @dots{})
+## @deftypefnx {} {@var{rnd} =} discrete_rnd (@var{v}, @var{p}, [@var{sz}])
 ## Return a matrix of random samples from the univariate distribution which
 ## assumes the values in @var{v} with probabilities @var{p}.
 ##
--- a/scripts/statistics/empirical_cdf.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/statistics/empirical_cdf.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} empirical_cdf (@var{x}, @var{data})
+## @deftypefn {} {@var{cdf} =} empirical_cdf (@var{x}, @var{data})
 ## For each element of @var{x}, compute the cumulative distribution function
 ## (CDF) at @var{x} of the empirical distribution obtained from
 ## the univariate sample @var{data}.
--- a/scripts/statistics/empirical_inv.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/statistics/empirical_inv.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,13 +24,13 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} empirical_inv (@var{x}, @var{data})
+## @deftypefn {} {@var{q} =} empirical_inv (@var{x}, @var{data})
 ## For each element of @var{x}, compute the quantile (the inverse of the CDF)
 ## at @var{x} of the empirical distribution obtained from the
 ## univariate sample @var{data}.
 ## @end deftypefn
 
-function inv = empirical_inv (x, data)
+function q = empirical_inv (x, data)
 
   if (nargin != 2)
     print_usage ();
@@ -40,7 +40,7 @@
     error ("empirical_inv: DATA must be a vector");
   endif
 
-  inv = discrete_inv (x, data, ones (size (data)));
+  q = discrete_inv (x, data, ones (size (data)));
 
 endfunction
 
--- a/scripts/statistics/empirical_pdf.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/statistics/empirical_pdf.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} empirical_pdf (@var{x}, @var{data})
+## @deftypefn {} {@var{pdf} =} empirical_pdf (@var{x}, @var{data})
 ## For each element of @var{x}, compute the probability density function (PDF)
 ## at @var{x} of the empirical distribution obtained from the
 ## univariate sample @var{data}.
--- a/scripts/statistics/empirical_rnd.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/statistics/empirical_rnd.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,10 +24,10 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} empirical_rnd (@var{data})
-## @deftypefnx {} {} empirical_rnd (@var{data}, @var{r})
-## @deftypefnx {} {} empirical_rnd (@var{data}, @var{r}, @var{c}, @dots{})
-## @deftypefnx {} {} empirical_rnd (@var{data}, [@var{sz}])
+## @deftypefn  {} {@var{rnd} =} empirical_rnd (@var{data})
+## @deftypefnx {} {@var{rnd} =} empirical_rnd (@var{data}, @var{r})
+## @deftypefnx {} {@var{rnd} =} empirical_rnd (@var{data}, @var{r}, @var{c}, @dots{})
+## @deftypefnx {} {@var{rnd} =} empirical_rnd (@var{data}, [@var{sz}])
 ## Return a matrix of random samples from the empirical distribution obtained
 ## from the univariate sample @var{data}.
 ##
--- a/scripts/statistics/kendall.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/statistics/kendall.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} kendall (@var{x})
-## @deftypefnx {} {} kendall (@var{x}, @var{y})
+## @deftypefn  {} {@var{tau} =} kendall (@var{x})
+## @deftypefnx {} {@var{tau} =} kendall (@var{x}, @var{y})
 ## @cindex Kendall's Tau
 ## Compute Kendall's
 ## @tex
--- a/scripts/statistics/kurtosis.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/statistics/kurtosis.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,9 +24,9 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} kurtosis (@var{x})
-## @deftypefnx {} {} kurtosis (@var{x}, @var{flag})
-## @deftypefnx {} {} kurtosis (@var{x}, @var{flag}, @var{dim})
+## @deftypefn  {} {@var{y} =} kurtosis (@var{x})
+## @deftypefnx {} {@var{y} =} kurtosis (@var{x}, @var{flag})
+## @deftypefnx {} {@var{y} =} kurtosis (@var{x}, @var{flag}, @var{dim})
 ## Compute the sample kurtosis of the elements of @var{x}.
 ##
 ## The sample kurtosis is defined as
--- a/scripts/statistics/mad.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/statistics/mad.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,9 +24,9 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} mad (@var{x})
-## @deftypefnx {} {} mad (@var{x}, @var{opt})
-## @deftypefnx {} {} mad (@var{x}, @var{opt}, @var{dim})
+## @deftypefn  {} {@var{y} =} mad (@var{x})
+## @deftypefnx {} {@var{y} =} mad (@var{x}, @var{opt})
+## @deftypefnx {} {@var{y} =} mad (@var{x}, @var{opt}, @var{dim})
 ## Compute the mean or median absolute deviation of the elements of @var{x}.
 ##
 ## The mean absolute deviation is defined as
--- a/scripts/statistics/mean.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/statistics/mean.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,11 +24,11 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} mean (@var{x})
-## @deftypefnx {} {} mean (@var{x}, @var{dim})
-## @deftypefnx {} {} mean (@var{x}, @var{opt})
-## @deftypefnx {} {} mean (@var{x}, @var{dim}, @var{opt})
-## @deftypefnx {} {} mean (@dots{}, @var{outtype})
+## @deftypefn  {} {@var{y} =} mean (@var{x})
+## @deftypefnx {} {@var{y} =} mean (@var{x}, @var{dim})
+## @deftypefnx {} {@var{y} =} mean (@var{x}, @var{opt})
+## @deftypefnx {} {@var{y} =} mean (@var{x}, @var{dim}, @var{opt})
+## @deftypefnx {} {@var{y} =} mean (@dots{}, @var{outtype})
 ## Compute the mean of the elements of the vector @var{x}.
 ##
 ## The mean is defined as
--- a/scripts/statistics/meansq.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/statistics/meansq.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} meansq (@var{x})
-## @deftypefnx {} {} meansq (@var{x}, @var{dim})
+## @deftypefn  {} {@var{y} =} meansq (@var{x})
+## @deftypefnx {} {@var{y} =} meansq (@var{x}, @var{dim})
 ## Compute the mean square of the elements of the vector @var{x}.
 ##
 ## The mean square is defined as
--- a/scripts/statistics/median.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/statistics/median.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} median (@var{x})
-## @deftypefnx {} {} median (@var{x}, @var{dim})
+## @deftypefn  {} {@var{y} =} median (@var{x})
+## @deftypefnx {} {@var{y} =} median (@var{x}, @var{dim})
 ## Compute the median value of the elements of the vector @var{x}.
 ##
 ## When the elements of @var{x} are sorted, say
@@ -60,7 +60,7 @@
 ## @seealso{mean, mode}
 ## @end deftypefn
 
-function retval = median (x, dim)
+function y = median (x, dim)
 
   if (nargin < 1)
     print_usage ();
@@ -88,16 +88,16 @@
   n = size (x, dim);
   k = floor ((n+1) / 2);
   if (mod (n, 2) == 1)
-    retval = nth_element (x, k, dim);
+    y = nth_element (x, k, dim);
   else
-    retval = sum (nth_element (x, k:k+1, dim), dim, "native") / 2;
+    y = sum (nth_element (x, k:k+1, dim), dim, "native") / 2;
     if (islogical (x))
-      retval = logical (retval);
+      y = logical (y);
     endif
   endif
   ## Inject NaNs where needed, to be consistent with Matlab.
   if (isfloat (x))
-    retval(any (isnan (x), dim)) = NaN;
+    y(any (isnan (x), dim)) = NaN;
   endif
 
 endfunction
--- a/scripts/statistics/mode.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/statistics/mode.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} mode (@var{x})
-## @deftypefnx {} {} mode (@var{x}, @var{dim})
+## @deftypefn  {} {@var{m} =} mode (@var{x})
+## @deftypefnx {} {@var{m} =} mode (@var{x}, @var{dim})
 ## @deftypefnx {} {[@var{m}, @var{f}, @var{c}] =} mode (@dots{})
 ## Compute the most frequently occurring value in a dataset (mode).
 ##
--- a/scripts/statistics/moment.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/statistics/moment.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,11 +24,11 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} moment (@var{x}, @var{p})
-## @deftypefnx {} {} moment (@var{x}, @var{p}, @var{type})
-## @deftypefnx {} {} moment (@var{x}, @var{p}, @var{dim})
-## @deftypefnx {} {} moment (@var{x}, @var{p}, @var{type}, @var{dim})
-## @deftypefnx {} {} moment (@var{x}, @var{p}, @var{dim}, @var{type})
+## @deftypefn  {} {@var{m} =} moment (@var{x}, @var{p})
+## @deftypefnx {} {@var{m} =} moment (@var{x}, @var{p}, @var{type})
+## @deftypefnx {} {@var{m} =} moment (@var{x}, @var{p}, @var{dim})
+## @deftypefnx {} {@var{m} =} moment (@var{x}, @var{p}, @var{type}, @var{dim})
+## @deftypefnx {} {@var{m} =} moment (@var{x}, @var{p}, @var{dim}, @var{type})
 ## Compute the @var{p}-th central moment of the vector @var{x}.
 ##
 ## The @var{p}-th central moment of @var{x} is defined as:
--- a/scripts/statistics/range.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/statistics/range.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} range (@var{x})
-## @deftypefnx {} {} range (@var{x}, @var{dim})
+## @deftypefn  {} {@var{y} =} range (@var{x})
+## @deftypefnx {} {@var{y} =} range (@var{x}, @var{dim})
 ## Return the range, i.e., the difference between the maximum and the minimum
 ## of the input data.
 ##
--- a/scripts/statistics/ranks.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/statistics/ranks.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,9 +24,9 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} ranks (@var{x})
-## @deftypefnx {} {} ranks (@var{x}, @var{dim})
-## @deftypefnx {} {} ranks (@var{x}, @var{dim}, @var{rtype})
+## @deftypefn  {} {@var{y} =} ranks (@var{x})
+## @deftypefnx {} {@var{y} =} ranks (@var{x}, @var{dim})
+## @deftypefnx {} {@var{y} =} ranks (@var{x}, @var{dim}, @var{rtype})
 ## Return the ranks (in the sense of order statistics) of @var{x} along the
 ## first non-singleton dimension adjusted for ties.
 ##
--- a/scripts/statistics/run_count.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/statistics/run_count.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} run_count (@var{x}, @var{n})
-## @deftypefnx {} {} run_count (@var{x}, @var{n}, @var{dim})
+## @deftypefn  {} {@var{cnt} =} run_count (@var{x}, @var{n})
+## @deftypefnx {} {@var{cnt} =} run_count (@var{x}, @var{n}, @var{dim})
 ## Count the upward runs along the first non-singleton dimension of @var{x}
 ## of length 1, 2, @dots{}, @var{n}-1 and greater than or equal to @var{n}.
 ##
@@ -34,7 +34,7 @@
 ## @seealso{runlength}
 ## @end deftypefn
 
-function retval = run_count (x, n, dim)
+function cnt = run_count (x, n, dim)
 
   if (nargin < 2)
     print_usage ();
@@ -44,7 +44,7 @@
     error ("run_count: X must be a numeric vector or matrix");
   endif
 
-  if (!(isscalar (n) && n == fix (n) && n > 0))
+  if (! (isscalar (n) && n == fix (n) && n > 0))
     error ("run_count: N must be a positive integer");
   endif
 
@@ -82,16 +82,16 @@
   tmp = tmp(idx{:});
 
   sz(1) = n;
-  retval = zeros (sz);
+  cnt = zeros (sz);
   for k = 1 : (n-1)
     idx{1} = k;
-    retval(idx{:}) = sum (tmp == k);
+    cnt(idx{:}) = sum (tmp == k);
   endfor
   idx{1} = n;
-  retval(idx{:}) = sum (tmp >= n);
+  cnt(idx{:}) = sum (tmp >= n);
 
   if (dim != 1)
-    retval = ipermute (retval, perm);
+    cnt = ipermute (cnt, perm);
   endif
 
 endfunction
--- a/scripts/statistics/skewness.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/statistics/skewness.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,9 +24,9 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} skewness (@var{x})
-## @deftypefnx {} {} skewness (@var{x}, @var{flag})
-## @deftypefnx {} {} skewness (@var{x}, @var{flag}, @var{dim})
+## @deftypefn  {} {@var{y} =} skewness (@var{x})
+## @deftypefnx {} {@var{y} =} skewness (@var{x}, @var{flag})
+## @deftypefnx {} {@var{y} =} skewness (@var{x}, @var{flag}, @var{dim})
 ## Compute the sample skewness of the elements of @var{x}.
 ##
 ## The sample skewness is defined as
--- a/scripts/statistics/spearman.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/statistics/spearman.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} spearman (@var{x})
-## @deftypefnx {} {} spearman (@var{x}, @var{y})
+## @deftypefn  {} {@var{rho} =} spearman (@var{x})
+## @deftypefnx {} {@var{rho} =} spearman (@var{x}, @var{y})
 ## @cindex Spearman's Rho
 ## Compute Spearman's rank correlation coefficient
 ## @tex
--- a/scripts/statistics/statistics.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/statistics/statistics.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} statistics (@var{x})
-## @deftypefnx {} {} statistics (@var{x}, @var{dim})
+## @deftypefn  {} {@var{stats} =} statistics (@var{x})
+## @deftypefnx {} {@var{stats} =} statistics (@var{x}, @var{dim})
 ## Return a vector with the minimum, first quartile, median, third quartile,
 ## maximum, mean, standard deviation, skewness, and kurtosis of the elements of
 ## the vector @var{x}.
--- a/scripts/statistics/std.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/statistics/std.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,10 +24,11 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} std (@var{x})
-## @deftypefnx {} {} std (@var{x}, @var{w})
-## @deftypefnx {} {} std (@var{x}, @var{w}, @var{dim})
-## @deftypefnx {} {} std (@var{x}, @var{w}, @qcode{"ALL"})
+## @deftypefn  {} {@var{y} =} std (@var{x})
+## @deftypefnx {} {@var{y} =} std (@var{x}, @var{w})
+## @deftypefnx {} {@var{y} =} std (@var{x}, @var{w}, @var{dim})
+## @deftypefnx {} {@var{y} =} std (@var{x}, @var{w}, @qcode{"ALL"})
+## @deftypefnx {} {[@var{y}, @var{mu}] =} std (@dots{})
 ## Compute the standard deviation of the elements of the vector @var{x}.
 ##
 ## The standard deviation is defined as
@@ -62,34 +63,46 @@
 ## unbiased estimator of the variance.
 ##
 ## @item 1:
-## Normalize with @math{N}. This provides the square root of the second moment
-## around the mean.
+## Normalize with @math{N}@.  This provides the square root of the second
+## moment around the mean.
 ##
 ## @item a vector:
-## Compute the weighted standard deviation with nonnegative scalar weights. The
-## length of @var{w} must be equal to the size of @var{x} along dimension
+## Compute the weighted standard deviation with non-negative scalar weights.
+## The length of @var{w} must equal the size of @var{x} along dimension
 ## @var{dim}.
 ## @end table
 ##
-## If @math{N} is equal to 1 the value of @var{W} is ignored and
-## normalization by @math{N} is used.
+## If @math{N} is equal to 1 the value of @var{W} is ignored and normalization
+## by @math{N} is used.
 ##
 ## The optional variable @var{dim} forces @code{std} to operate over the
-## specified dimension.  @var{dim} can either be a scalar dimension or a vector
-## of non-repeating dimensions over which to operate.  Dimensions must be
-## positive integers, and the standard deviation is calculated over the array
-## slice defined by @var{dim}.
+## specified dimension(s).  @var{dim} can either be a scalar dimension or a
+## vector of non-repeating dimensions.  Dimensions must be positive integers,
+## and the standard deviation is calculated over the array slice defined by
+## @var{dim}.
 ##
-## Specifying dimension @qcode{"ALL"} will force @code{std} to operate on all
+## Specifying dimension @qcode{"all"} will force @code{std} to operate on all
 ## elements of @var{x}, and is equivalent to @code{std (@var{x}(:))}.
 ##
-## When @var{dim} is a vector or @qcode{"ALL"}, @var{w} must be either 0 or 1.
+## When @var{dim} is a vector or @qcode{"all"}, @var{w} must be either 0 or 1.
+##
+## The optional second output variable @var{mu} contains the mean or weighted
+## mean used to calculate @var{y}, and will be the same size as @var{y}.
 ## @seealso{var, bounds, mad, range, iqr, mean, median}
 ## @end deftypefn
 
-function retval = std (varargin)
+function [y, mu] = std (varargin)
+
+  if (nargin < 1)
+    print_usage ();
+  endif
 
-  retval = sqrt (var (varargin{:}));
+  if (nargout < 2)
+    y = sqrt (var (varargin{:}));
+  else
+    [y, mu] = var (varargin{:});
+    y = sqrt (y);
+  endif
 
 endfunction
 
@@ -108,31 +121,5 @@
 %!assert (std (single (1)), single (0))
 %!assert (std ([1 2 3], [], 3), [0 0 0])
 
-##Test empty inputs
-%!assert (std ([]), NaN)
-%!assert (std ([],[],1), NaN(1,0))
-%!assert (std ([],[],2), NaN(0,1))
-%!assert (std ([],[],3), [])
-%!assert (std (ones (0,1)), NaN)
-%!assert (std (ones (1,0)), NaN)
-%!assert (std (ones (1,0), [], 1), NaN(1,0))
-%!assert (std (ones (1,0), [], 2), NaN)
-%!assert (std (ones (1,0), [], 3), NaN(1,0))
-%!assert (std (ones (0,1)), NaN)
-%!assert (std (ones (0,1), [], 1), NaN)
-%!assert (std (ones (0,1), [], 2), NaN(0,1))
-%!assert (std (ones (0,1), [], 3), NaN(0,1))
-%!assert (std (ones (1,3,0,2)), NaN(1,1,0,2))
-%!assert (std (ones (1,3,0,2), [], 1), NaN(1,3,0,2))
-%!assert (std (ones (1,3,0,2), [], 2), NaN(1,1,0,2))
-%!assert (std (ones (1,3,0,2), [], 3), NaN(1,3,1,2))
-%!assert (std (ones (1,3,0,2), [], 4), NaN(1,3,0))
-
-
 ## Test input validation
 %!error <Invalid call> std ()
-%!error <X must be a numeric> std (['A'; 'B'])
-%!error <W must be 0> std ([1 2], 2)
-%!error <DIM must be a positive integer> std (1, [], ones (2,2))
-%!error <DIM must be a positive integer> std (1, [], 1.5)
-%!error <DIM must be a positive integer> std (1, [], 0)
--- a/scripts/statistics/var.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/statistics/var.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,10 +24,11 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} var (@var{x})
-## @deftypefnx {} {} var (@var{x}, @var{w})
-## @deftypefnx {} {} var (@var{x}, @var{w}, @var{dim})
-## @deftypefnx {} {} var (@var{x}, @var{w}, @qcode{"ALL"})
+## @deftypefn  {} {@var{v} =} var (@var{x})
+## @deftypefnx {} {@var{v} =} var (@var{x}, @var{w})
+## @deftypefnx {} {@var{v} =} var (@var{x}, @var{w}, @var{dim})
+## @deftypefnx {} {@var{v} =} var (@var{x}, @var{w}, @qcode{"ALL"})
+## @deftypefnx {} {[@var{v}, @var{m}] =} var (@dots{})
 ## Compute the variance of the elements of the vector @var{x}.
 ##
 ## The variance is defined as
@@ -51,9 +52,9 @@
 ## where @math{N} is the length of the @var{x} vector.
 ##
 ## @end ifnottex
-## If @var{x} is an array, compute the variance for each column and return
-## them in a row vector (or for an n-D array, the result is returned as
-## an array of dimension 1 x n x m x @dots{}).
+## If @var{x} is an array, compute the variance for each column and return them
+## in a row vector (or for an n-D array, the result is returned as an array of
+## dimension 1 x n x m x @dots{}).
 ##
 ## The optional argument @var{w} determines the weighting scheme to use.  Valid
 ## values are
@@ -64,166 +65,172 @@
 ## unbiased estimator of the variance.
 ##
 ## @item 1:
-## Normalize with @math{N}, this provides the square root of the second moment
-## around the mean
+## Normalize with @math{N}@.  This provides the square root of the second
+## moment around the mean.
 ##
 ## @item a vector:
-## Compute the weighted variance with nonnegative scalar weights.  The length of
-## @var{w} must be equal to the size of @var{x} along dimension @var{dim}.
+## Compute the weighted variance with non-negative scalar weights.  The length
+## of @var{w} must equal the size of @var{x} along dimension @var{dim}.
 ## @end table
 ##
-## If @math{N} is equal to 1 the value of @var{W} is ignored and
-## normalization by @math{N} is used.
+## If @math{N} is equal to 1 the value of @var{W} is ignored and normalization
+## by @math{N} is used.
 ##
 ## The optional variable @var{dim} forces @code{var} to operate over the
-## specified dimension.  @var{dim} can either be a scalar dimension or a vector
-## of non-repeating dimensions over which to operate.  Dimensions must be
-## positive integers, and the variance is calculated over the array slice
-## defined by @var{dim}.
+## specified dimension(s).  @var{dim} can either be a scalar dimension or a
+## vector of non-repeating dimensions.  Dimensions must be positive integers,
+## and the variance is calculated over the array slice defined by @var{dim}.
 ##
-## Specifying dimension @qcode{"ALL"} will force @code{var} to operate on all
+## Specifying dimension @qcode{"all"} will force @code{var} to operate on all
 ## elements of @var{x}, and is equivalent to @code{var (@var{x}(:))}.
 ##
-## When @var{dim} is a vector or @qcode{"ALL"}, @var{w} must be either 0 or 1.
+## When @var{dim} is a vector or @qcode{"all"}, @var{w} must be either 0 or 1.
+##
+## The optional second output variable @var{mu} contains the mean or weighted
+## mean used to calculate @var{v}, and will be the same size as @var{v}.
 ## @seealso{cov, std, skewness, kurtosis, moment}
 ## @end deftypefn
 
-function retval = var (x, w = 0, dim)
+function [v, mu] = var (x, w = 0, dim = [])
 
   if (nargin < 1)
     print_usage ();
-  elseif (nargin < 3)
-    dim = [];
   endif
 
   if (! (isnumeric (x) || islogical (x)))
     error ("var: X must be a numeric vector or matrix");
   endif
 
+  if (isempty (w))
+    w = 0;
+  endif
+
   nd = ndims (x);
   sz = size (x);
   emptydimflag = false;
 
   if (isempty (dim))
-    emptydimflag = true;  ## Compatibliity hack for empty x, ndims==2
+    emptydimflag = true;  # Compatibility hack for empty x, ndims==2
+
     ## Find the first non-singleton dimension.
-   (dim = find (sz != 1, 1)) || (dim = 1);
+    (dim = find (sz != 1, 1)) || (dim = 1);
 
   else
-    if (! (isscalar (dim) && dim == fix (dim) && dim > 0))
-      if (isvector (dim) &&
-          isnumeric (dim) &&
-          all (dim > 0) &&
-          all (rem (dim, 1) == 0))
-        if (dim != unique (dim, "stable"))
-          error (["var: vector DIM must contain non-repeating positive"...
-                  "integers"]);
-        endif
-        ## Check W
-        if (! isscalar (w))
-          error ("var: W must be either 0 or 1 when DIM is a vector");
-        endif
-
-        ## Reshape X to compute the variance over an array slice
-        if (iscolumn (dim))
-          dim = transpose (dim);
-        endif
-
-        collapsed_dims = dim;
-        dim = dim(end);
-
-        ## Permute X to cluster the dimensions to collapse
-        highest_dim = max ([nd, collapsed_dims]);
-        perm_start = perm_end = [1:highest_dim];
-        perm_start(dim:end) = [];
-        perm_start(ismember (perm_start, collapsed_dims)) = [];
-        perm_end(1:dim) = [];
-        perm_end(ismember (perm_end, collapsed_dims)) = [];
-        perm = [perm_start, collapsed_dims, perm_end];
-
-        x = permute (x, perm);
-
-        ## Collapse the given dimensions
-        newshape = ones (1, highest_dim);
-        newshape(1:nd) = sz;
-        newshape(collapsed_dims(1:(end - 1))) = 1;
-        newshape(dim) = prod (sz(collapsed_dims));
-
-        ## New X with collapsed dimensions
-        x = reshape (x, newshape);
-      elseif (ischar (dim) &&
-              strcmp (tolower (dim), "all"))
-        ## Check W
-        if (! isscalar (w))
-          error ("var: W must be either 0 or 1 when using 'ALL' as dimension");
-        endif
-
-        ## "ALL" equals to collapsing all elements to a single vector
-        x = x(:);
-        dim = 1;
-        sz = size (x);
-      else
+    if (isscalar (dim))
+      if (dim < 1 || dim != fix (dim))
+        error ("var: DIM must be a positive integer scalar, vector, or 'all'");
+      endif
+    elseif (isnumeric (dim))
+      if (! isvector (dim) && all (dim > 0) && all (rem (dim, 1) == 0))
         error ("var: DIM must be a positive integer scalar, vector, or 'all'");
       endif
+      if (dim != unique (dim, "stable"))
+        error ("var: vector DIM must contain non-repeating positive integers");
+      endif
+      if (! isscalar (w))
+        error ("var: W must be either 0 or 1 when DIM is a vector");
+      endif
+
+      ## Reshape X to compute the variance over an array slice
+      if (iscolumn (dim))
+        dim = dim.';
+      endif
+
+      collapsed_dims = dim;
+      dim = dim(end);
+
+      ## Permute X to cluster the dimensions to collapse
+      max_dim = max ([nd, collapsed_dims]);
+      perm_start = perm_end = [1:max_dim];
+      perm_start(dim:end) = [];
+      perm_start(ismember (perm_start, collapsed_dims)) = [];
+      perm_end(1:dim) = [];
+      perm_end(ismember (perm_end, collapsed_dims)) = [];
+      perm = [perm_start, collapsed_dims, perm_end];
+
+      x = permute (x, perm);
+
+      ## Collapse the given dimensions
+      newshape = ones (1, max_dim);
+      newshape(1:nd) = sz;
+      newshape(collapsed_dims(1:(end-1))) = 1;
+      newshape(dim) = prod (sz(collapsed_dims));
+
+      ## New X with collapsed dimensions
+      x = reshape (x, newshape);
+
+    elseif (ischar (dim) && strcmpi (dim, "all"))
+      if (! isscalar (w))
+        error ("var: W must be either 0 or 1 when using 'all' as dimension");
+      endif
+
+      ## "all" equates to collapsing all elements to a single vector
+      x = x(:);
+      dim = 1;
+      sz = size (x);
+    else
+      error ("var: DIM must be a positive integer scalar, vector, or 'all'");
     endif
   endif
 
   n = size (x, dim);
-  if (isempty (w))
-    w = 0;
-  elseif (! isvector (w) ||
-          ! isnumeric (w) ||
-          (isvector (w) && any (w < 0)) ||
+  if (! isvector (w) || ! isnumeric (w)
+      || (isvector (w) && any (w < 0)) ||
           (isscalar (w) && ((w != 0 && w != 1) && (n != 1))))
     error ("var: W must be 0, 1, or a vector of positive integers");
   endif
 
   if (isempty (x))
-    if (emptydimflag && isequal (sz, [0 0]))
-      retval = NaN;
+    ## Empty matrix special case
+    if (emptydimflag && nd == 2 && all (sz == [0, 0]))
+      v = NaN;
+      mu = NaN;
     else
-      output_size = sz;
-      output_size(dim) = 1;
-      retval = NaN(output_size);
+      sz(dim) = 1;
+      v = NaN (sz);
+      mu = NaN (sz);
+    endif
+  elseif (n == 1)
+    ## Scalar special case
+    if (! isscalar (w))
+      error (["var: the length of W must be equal to the size of X " ...
+              "in the dimension along which variance is calculated"]);
+    endif
+    if (isa (x, "single"))
+      v = zeros (sz, "single");
+      mu = x;
+    else
+      v = zeros (sz);
+      mu = x;
     endif
   else
-    if (n == 1)
-      if (! isscalar (w))
-        error (["var: the length of W must be equal to the size of X "...
-                  "in the dimension along which variance is calculated"])
-      else
-        if (isa (x, "single"))
-          retval = zeros (sz, "single");
-        else
-          retval = zeros (sz);
-        endif
+    ## Regular algorithm
+    if (isscalar (w))
+      v = sumsq (center (x, dim), dim) / (n - 1 + w);
+      if (nargout == 2)
+        mu = mean (x, dim);
       endif
     else
-      if (isscalar (w))
-        retval = sumsq (center (x, dim), dim) / (n - 1 + w);
-      else
-        ## Weighted variance
-        if (length (w) != n)
-          error (["var: the length of W must be equal to the size of X "...
-                  "in the dimension along which variance is calculated"]);
-        else
-          if ((dim == 1 && rows (w) == 1) ||
-              (dim == 2 && columns (w) == 1))
-            w = transpose (w);
-          elseif (dim > 2)
-            newdims = [(ones (1, (dim - 1))), (length (w))];
-            w = reshape (w, newdims);
-          endif
-          den = sum (w);
-          mu = sum (w .* x, dim) ./ sum (w);
-          retval = sum (w .* ((x - mu) .^ 2), dim) / den;
-        endif
+      ## Weighted variance
+      if (numel (w) != n)
+        error (["var: the length of W must be equal to the size of X " ...
+                "in the dimension along which variance is calculated"]);
       endif
+      if ((dim == 1 && isrow (w)) || (dim == 2 && iscolumn (w)))
+        w = w.';
+      elseif (dim > 2)
+        newdims = [ones(1, dim - 1), numel(w)];
+        w = reshape (w, newdims);
+      endif
+      den = sum (w);
+      mu = sum (w .* x, dim) ./ den;
+      v = sum (w .* ((x - mu) .^ 2), dim) ./ den;
     endif
   endif
 
 endfunction
 
+
 %!assert (var (13), 0)
 %!assert (var (single (13)), single (0))
 %!assert (var ([1,2,3]), 1)
@@ -238,8 +245,9 @@
 %!assert (var (ones (2,2,2), [1:2], 3), [(zeros (2,2))])
 %!assert (var ([1 2; 3 4], 0, 'all'), var ([1:4]))
 %!assert (var (reshape ([1:8], 2, 2, 2), 0, [1 3]), [17/3 17/3], eps)
+%!assert (var ([1 2 3;1 2 3], [], [1 2]), 0.8, eps)
 
-##Test empty inputs
+## Test empty inputs
 %!assert (var ([]), NaN)
 %!assert (var ([],[],1), NaN(1,0))
 %!assert (var ([],[],2), NaN(0,1))
@@ -259,6 +267,49 @@
 %!assert (var (ones (1,3,0,2), [], 3), NaN(1,3,1,2))
 %!assert (var (ones (1,3,0,2), [], 4), NaN(1,3,0))
 
+## Test second output
+%!test <*62395>
+%! [~, m] = var (13);
+%! assert (m, 13);
+%! [~, m] = var (single(13));
+%! assert (m, single(13));
+%! [~, m] = var ([1, 2, 3; 3 2 1], []);
+%! assert (m, [2 2 2]);
+%! [~, m] = var ([1, 2, 3; 3 2 1], [], 1);
+%! assert (m, [2 2 2]);
+%! [~, m] = var ([1, 2, 3; 3 2 1], [], 2);
+%! assert (m, [2 2]');
+%! [~, m] = var ([1, 2, 3; 3 2 1], [], 3);
+%! assert (m, [1 2 3; 3 2 1]);
+
+## 2nd output, weighted inputs, vector dims
+%!test <*62395>
+%! [~, m] = var(5,99);
+%! assert (m, 5);
+%! [~, m] = var ([1:7], [1:7]);
+%! assert (m, 5);
+%! [~, m] = var ([eye(3)], [1:3]);
+%! assert (m, [1/6, 1/3, 0.5], eps);
+%! [~, m] = var (ones (2,2,2), [1:2], 3);
+%! assert (m, ones (2,2));
+%! [~, m] = var ([1 2; 3 4], 0, 'all');
+%! assert (m, 2.5, eps);
+%! [~, m] = var (reshape ([1:8], 2, 2, 2), 0, [1 3]);
+%! assert (m, [3.5, 5.5], eps);
+
+## 2nd output, empty inputs
+%!test <*62395>
+%! [~, m] = var ([]);
+%! assert (m, NaN);
+%! [~, m] = var ([],[],1);
+%! assert (m, NaN(1,0));
+%! [~, m] = var ([],[],2);
+%! assert (m, NaN(0,1));
+%! [~, m] = var ([],[],3);
+%! assert (m, []);
+%! [~, m] = var (ones (1,3,0,2));
+%! assert (m, NaN(1,1,0,2));
+
 ## Test input validation
 %!error <Invalid call> var ()
 %!error <X must be a numeric> var (['A'; 'B'])
--- a/scripts/strings/base2dec.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/strings/base2dec.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} base2dec (@var{s}, @var{base})
-## Convert @var{s} from a string of digits in base @var{base} to a decimal
+## @deftypefn {} {@var{d} =} base2dec (@var{str}, @var{base})
+## Convert @var{str} from a string of digits in base @var{base} to a decimal
 ## integer (base 10).
 ##
 ## @example
@@ -35,15 +35,16 @@
 ## @end group
 ## @end example
 ##
-## If @var{s} is a string matrix, return a column vector with one value per
-## row of @var{s}.  If a row contains invalid symbols then the corresponding
+## If @var{str} is a string matrix, return a column vector with one value per
+## row of @var{str}.  If a row contains invalid symbols then the corresponding
 ## value will be NaN@.
 ##
-## If @var{s} is a cell array of strings, return a column vector with one
-## value per cell element in @var{s}.
+## If @var{str} is a cell array of strings, return a column vector with one
+## value per cell element in @var{str}.
 ##
 ## If @var{base} is a string, the characters of @var{base} are used as the
-## symbols for the digits of @var{s}.  Space (' ') may not be used as a symbol.
+## symbols for the digits of @var{str}.  Space (' ') may not be used as a
+## symbol.
 ##
 ## @example
 ## @group
@@ -54,16 +55,16 @@
 ## @seealso{dec2base, bin2dec, hex2dec}
 ## @end deftypefn
 
-function out = base2dec (s, base)
+function d = base2dec (str, base)
 
   if (nargin != 2)
     print_usage ();
   endif
 
-  if (iscellstr (s))
-    s = char (s);
-  elseif (! ischar (s))
-    error ("base2dec: S must be a string or cellstring");
+  if (iscellstr (str))
+    str = char (str);
+  elseif (! ischar (str))
+    error ("base2dec: STR must be a string or cellstring");
   endif
 
   symbols = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
@@ -81,16 +82,16 @@
   elseif (! (base >= 2 && base <= length (symbols)))
     error ("base2dec: BASE must be between 2 and 36, or a string of symbols");
   else
-    s = toupper (s);
+    str = toupper (str);
   endif
 
   ## Right justify the values and squeeze out any spaces.
   ## This looks complicated, but indexing solution is very fast
   ## compared to alternatives which use cellstr or cellfun or looping.
-  [nr, nc] = size (s);
+  [nr, nc] = size (str);
   if (nc > 1)   # Bug #35621
-    s = s.';
-    nonbl = s != " ";
+    str = str.';
+    nonbl = str != " ";
     num_nonbl = sum (nonbl);
     nc = max (num_nonbl);
     num_blank = nc - num_nonbl;
@@ -102,8 +103,8 @@
 
     ## Create a blank matrix and position the nonblank characters.
     s2 = repmat (" ", nc, nr);
-    s2(idx) = s(nonbl);
-    s = s2.';
+    s2(idx) = str(nonbl);
+    str = s2.';
   endif
 
   ## Lookup value of symbols in symbol table, with invalid symbols
@@ -111,11 +112,11 @@
   table = NaN (1, 256);
   table(double (symbols(1:base))) = 0 : base-1;
   table(double (" ")) = 0;
-  s = reshape (table(double (s)), size (s));
+  str = reshape (table(double (str)), size (str));
 
   ## Multiply the resulting digits by the appropriate power
   ## and sum the rows.
-  out = s * (base .^ (columns (s)-1 : -1 : 0)');
+  d = str * (base .^ (columns (str)-1 : -1 : 0)');
 
 endfunction
 
--- a/scripts/strings/bin2dec.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/strings/bin2dec.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,9 +24,9 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} bin2dec (@var{s})
+## @deftypefn {} {} bin2dec (@var{str})
 ## Return the decimal number corresponding to the binary number represented
-## by the string @var{s}.
+## by the string @var{str}.
 ##
 ## For example:
 ##
@@ -47,21 +47,21 @@
 ## @end group
 ## @end example
 ##
-## If @var{s} is a string matrix, return a column vector with one converted
-## number per row of @var{s}; Invalid rows evaluate to NaN@.
+## If @var{str} is a string matrix, return a column vector with one converted
+## number per row of @var{str}; Invalid rows evaluate to NaN@.
 ##
-## If @var{s} is a cell array of strings, return a column vector with one
-## converted number per cell element in @var{s}.
+## If @var{str} is a cell array of strings, return a column vector with one
+## converted number per cell element in @var{str}.
 ## @seealso{dec2bin, base2dec, hex2dec}
 ## @end deftypefn
 
-function d = bin2dec (s)
+function d = bin2dec (str)
 
-  if (nargin < 1)
+  if (nargin != 1)
     print_usage ();
   endif
 
-  d = base2dec (s, 2);
+  d = base2dec (str, 2);
 
 endfunction
 
@@ -76,4 +76,4 @@
 
 ## Test input validation
 %!error <Invalid call> bin2dec ()
-%!error <S must be a string> bin2dec (1)
+%!error <STR must be a string> bin2dec (1)
--- a/scripts/strings/blanks.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/strings/blanks.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} blanks (@var{n})
+## @deftypefn {} {@var{str} =} blanks (@var{n})
 ## Return a string of @var{n} blanks.
 ##
 ## For example:
@@ -42,7 +42,7 @@
 ## @seealso{repmat}
 ## @end deftypefn
 
-function s = blanks (n)
+function str = blanks (n)
 
   if (nargin < 1)
     print_usage ();
@@ -52,7 +52,7 @@
 
   ## If 1:n is empty, the following expression will create an empty
   ## character string.  Otherwise, it will create a row vector.
-  s(1:n) = " ";
+  str(1:n) = " ";
 
 endfunction
 
--- a/scripts/strings/cstrcat.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/strings/cstrcat.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} cstrcat (@var{s1}, @var{s2}, @dots{})
+## @deftypefn {} {@var{str} =} cstrcat (@var{s1}, @var{s2}, @dots{})
 ## Return a string containing all the arguments concatenated horizontally
 ## with trailing white space preserved.
 ##
@@ -48,14 +48,14 @@
 ## @seealso{strcat, char, strvcat}
 ## @end deftypefn
 
-function st = cstrcat (varargin)
+function str = cstrcat (varargin)
 
   if (nargin == 0)
-    ## Special because if varargin is empty, iscellstr still returns
+    ## Special case because if varargin is empty, iscellstr still returns
     ## true but then "[varargin{:}]" would be of class double.
-    st = "";
+    str = "";
   elseif (iscellstr (varargin))
-    st = [varargin{:}];
+    str = [varargin{:}];
   else
     error ("cstrcat: arguments must be character strings");
   endif
@@ -64,15 +64,16 @@
 
 
 ## Test the dimensionality
-## 1d
+## 1-D
 %!assert (cstrcat ("ab ", "ab "), "ab ab ")
-## 2d
+## 2-D
 %!assert (cstrcat (["ab ";"cde"], ["ab ";"cde"]), ["ab ab ";"cdecde"])
 
 %!assert (cstrcat ("foo", "bar"), "foobar")
 %!assert (cstrcat (["a "; "bb"], ["foo"; "bar"]), ["a foo"; "bbbar"])
 
+## Special null case
 %!assert (cstrcat (), "")
 
 ## Test input validation
-%!error cstrcat (1, 2)
+%!error <arguments must be character strings> cstrcat (1, 2)
--- a/scripts/strings/deblank.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/strings/deblank.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,11 +24,11 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} deblank (@var{s})
+## @deftypefn {} {@var{s} =} deblank (@var{s})
 ## Remove trailing whitespace and nulls from @var{s}.
 ##
 ## If @var{s} is a matrix, @var{deblank} trims each row to the length of
-## longest string.  If @var{s} is a cell array of strings, operate
+## the longest string.  If @var{s} is a cell array of strings, operate
 ## recursively on each string element.
 ##
 ## Examples:
@@ -47,7 +47,7 @@
 
 function s = deblank (s)
 
-  if (nargin < 1)
+  if (nargin != 1)
     print_usage ();
   endif
 
--- a/scripts/strings/dec2base.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/strings/dec2base.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} dec2base (@var{d}, @var{base})
-## @deftypefnx {} {} dec2base (@var{d}, @var{base}, @var{len})
+## @deftypefn  {} {@var{str} =} dec2base (@var{d}, @var{base})
+## @deftypefnx {} {@var{str} =} dec2base (@var{d}, @var{base}, @var{len})
 ## Return a string of symbols in base @var{base} corresponding to the
 ## non-negative integer @var{d}.
 ##
@@ -56,7 +56,7 @@
 ## @seealso{base2dec, dec2bin, dec2hex}
 ## @end deftypefn
 
-function retval = dec2base (d, base, len)
+function str = dec2base (d, base, len)
 
   if (nargin < 2)
     print_usage ();
@@ -109,7 +109,7 @@
   endfor
 
   ## convert digits to symbols
-  retval = reshape (symbols(digits+1), size (digits));
+  str = reshape (symbols(digits+1), size (digits));
 
   ## Check if the first element is the zero symbol.  It seems possible
   ## that LEN is provided, and is less than the computed MAX_LEN and
@@ -117,8 +117,8 @@
   ## have a leading zero to remove.  But if LEN >= MAX_LEN, we should
   ## not remove any leading zeros.
   if ((nargin == 2 || (nargin == 3 && max_len > len))
-      && columns (retval) != 1 && ! any (retval(:,1) != symbols(1)))
-    retval = retval(:,2:end);
+      && columns (str) != 1 && ! any (str(:,1) != symbols(1)))
+    str = str(:,2:end);
   endif
 
 endfunction
--- a/scripts/strings/dec2bin.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/strings/dec2bin.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} dec2bin (@var{d})
-## @deftypefnx {} {} dec2bin (@var{d}, @var{len})
+## @deftypefn  {} {@var{bstr} =} dec2bin (@var{d})
+## @deftypefnx {} {@var{bstr} =} dec2bin (@var{d}, @var{len})
 ## Return a string of ones and zeros representing the conversion of the integer
 ## @var{d} to a binary number.
 ##
@@ -63,7 +63,7 @@
 ## @seealso{bin2dec, dec2base, dec2hex}
 ## @end deftypefn
 
-function b = dec2bin (d, len)
+function bstr = dec2bin (d, len)
 
   if (nargin == 0)
     print_usage ();
@@ -92,9 +92,9 @@
   endif
 
   if (nargin == 1)
-    b = dec2base (d, 2);
+    bstr = dec2base (d, 2);
   else
-    b = dec2base (d, 2, len);
+    bstr = dec2base (d, 2, len);
   endif
 
 endfunction
--- a/scripts/strings/dec2hex.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/strings/dec2hex.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} dec2hex (@var{d})
-## @deftypefnx {} {} dec2hex (@var{d}, @var{len})
+## @deftypefn  {} {@var{hstr} =} dec2hex (@var{d})
+## @deftypefnx {} {@var{hstr} =} dec2hex (@var{d}, @var{len})
 ## Return a string representing the conversion of the integer @var{d} to a
 ## hexadecimal (base16) number.
 ##
@@ -53,7 +53,7 @@
 ## @seealso{hex2dec, dec2base, dec2bin}
 ## @end deftypefn
 
-function h = dec2hex (d, len)
+function hstr = dec2hex (d, len)
 
   if (nargin == 0)
     print_usage ();
@@ -82,9 +82,9 @@
   endif
 
   if (nargin == 1)
-    h = dec2base (d, 16);
+    hstr = dec2base (d, 16);
   else
-    h = dec2base (d, 16, len);
+    hstr = dec2base (d, 16, len);
   endif
 
 endfunction
--- a/scripts/strings/hex2dec.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/strings/hex2dec.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,9 +24,9 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} hex2dec (@var{s})
+## @deftypefn {} {@var{d} =} hex2dec (@var{str})
 ## Return the integer corresponding to the hexadecimal number represented by
-## the string @var{s}.
+## the string @var{str}.
 ##
 ## For example:
 ##
@@ -39,22 +39,22 @@
 ## @end group
 ## @end example
 ##
-## If @var{s} is a string matrix, return a column vector with one converted
-## number per row of @var{s}; Invalid rows evaluate to NaN@.
+## If @var{str} is a string matrix, return a column vector with one converted
+## number per row of @var{str}; Invalid rows evaluate to NaN@.
 ##
-## If @var{s} is a cell array of strings, return a column vector with one
-## converted number per cell element in @var{s}.
+## If @var{str} is a cell array of strings, return a column vector with one
+## converted number per cell element in @var{str}.
 ##
 ## @seealso{dec2hex, base2dec, bin2dec}
 ## @end deftypefn
 
-function d = hex2dec (s)
+function d = hex2dec (str)
 
-  if (nargin < 1)
+  if (nargin != 1)
     print_usage ();
   endif
 
-  d = base2dec (s, 16);
+  d = base2dec (str, 16);
 
 endfunction
 
@@ -66,4 +66,4 @@
 
 ## Test input validation
 %!error <Invalid call> hex2dec ()
-%!error <S must be a string> hex2dec (1)
+%!error <STR must be a string> hex2dec (1)
--- a/scripts/strings/index.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/strings/index.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} index (@var{s}, @var{t})
-## @deftypefnx {} {} index (@var{s}, @var{t}, @var{direction})
+## @deftypefn  {} {@var{n} =} index (@var{s}, @var{t})
+## @deftypefnx {} {@var{n} =} index (@var{s}, @var{t}, @var{direction})
 ## Return the position of the first occurrence of the string @var{t} in the
 ## string @var{s}, or 0 if no occurrence is found.
 ##
--- a/scripts/strings/isletter.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/strings/isletter.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} isletter (@var{s})
+## @deftypefn {} {@var{tf} =} isletter (@var{s})
 ## Return a logical array which is true where the elements of @var{s}
 ## are letters and false where they are not.
 ##
@@ -32,13 +32,13 @@
 ## @seealso{isalpha, isdigit, ispunct, isspace, iscntrl, isalnum}
 ## @end deftypefn
 
-function retval = isletter (s)
+function tf = isletter (s)
 
   if (nargin < 1)
     print_usage ();
   endif
 
-  retval = isalpha (s);
+  tf = isalpha (s);
 
 endfunction
 
--- a/scripts/strings/isstring.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/strings/isstring.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} isstring (@var{s})
+## @deftypefn {} {@var{tf} =} isstring (@var{s})
 ## Return true if @var{s} is a string array.
 ##
 ## A string array is a data type that stores strings (row vectors of
@@ -40,13 +40,13 @@
 ## @seealso{ischar, iscellstr, isfloat, isinteger, islogical, isnumeric, isa}
 ## @end deftypefn
 
-function retval = isstring (s)
+function tf = isstring (s)
 
   if (nargin < 1)
     print_usage ();
   endif
 
-  retval = false;
+  tf = false;
 
 endfunction
 
--- a/scripts/strings/isstrprop.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/strings/isstrprop.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} isstrprop (@var{str}, @var{prop})
+## @deftypefn {} {@var{tf} =} isstrprop (@var{str}, @var{prop})
 ## Test character string properties.
 ##
 ## For example:
@@ -91,7 +91,7 @@
 ## isspace, ispunct, iscntrl, isgraph, isprint, isascii}
 ## @end deftypefn
 
-function retval = isstrprop (str, prop)
+function tf = isstrprop (str, prop)
 
   if (nargin != 2)
     print_usage ();
@@ -99,29 +99,29 @@
 
   switch (prop)
     case "alpha"
-      retval = isalpha (str);
+      tf = isalpha (str);
     case {"alnum", "alphanum"}
-      retval = isalnum (str);
+      tf = isalnum (str);
     case "ascii"
-      retval = isascii (str);
+      tf = isascii (str);
     case "cntrl"
-      retval = iscntrl (str);
+      tf = iscntrl (str);
     case "digit"
-      retval = isdigit (str);
+      tf = isdigit (str);
     case {"graph", "graphic"}
-      retval = isgraph (str);
+      tf = isgraph (str);
     case "lower"
-      retval = islower (str);
+      tf = islower (str);
     case "print"
-      retval = isprint (str);
+      tf = isprint (str);
     case "punct"
-      retval = ispunct (str);
+      tf = ispunct (str);
     case {"space", "wspace"}
-      retval = isspace (str);
+      tf = isspace (str);
     case "upper"
-      retval = isupper (str);
+      tf = isupper (str);
     case "xdigit"
-      retval = isxdigit (str);
+      tf = isxdigit (str);
     otherwise
       error ("isstrprop: invalid string property");
   endswitch
--- a/scripts/strings/regexptranslate.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/strings/regexptranslate.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} regexptranslate (@var{op}, @var{s})
+## @deftypefn {} {@var{str} =} regexptranslate (@var{op}, @var{s})
 ## Translate a string for use in a regular expression.
 ##
 ## This may include either wildcard replacement or special character escaping.
@@ -59,7 +59,7 @@
 ## @seealso{regexp, regexpi, regexprep}
 ## @end deftypefn
 
-function y = regexptranslate (op, s)
+function str = regexptranslate (op, s)
 
   if (nargin != 2)
     print_usage ();
@@ -71,11 +71,11 @@
 
   op = tolower (op);
   if (strcmp ("wildcard", op))
-    y = strrep (strrep (strrep (s, '.', '\.'),
-                                   '*', '.*'),
-                                   '?', '.');
+    str = strrep (strrep (strrep (s, '.', '\.'),
+                                     '*', '.*'),
+                                     '?', '.');
   elseif (strcmp ("escape", op))
-    y = regexprep (s, '([][(){}.*+?^$|\\])', '\\$1');
+    str = regexprep (s, '([][(){}.*+?^$|\\])', '\\$1');
   else
     error ("regexptranslate: invalid operation OP");
   endif
--- a/scripts/strings/rindex.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/strings/rindex.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} rindex (@var{s}, @var{t})
+## @deftypefn {} {@var{n} =} rindex (@var{s}, @var{t})
 ## Return the position of the last occurrence of the character string
 ## @var{t} in the character string @var{s}, or 0 if no occurrence is
 ## found.
--- a/scripts/strings/strcat.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/strings/strcat.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,9 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} strcat (@var{s1}, @var{s2}, @dots{})
-## Return a string containing all the arguments concatenated
-## horizontally.
+## @deftypefn {} {@var{str} =} strcat (@var{s1}, @var{s2}, @dots{})
+## Return a string containing all the arguments concatenated horizontally.
 ##
 ## If the arguments are cell strings, @code{strcat} returns a cell string
 ## with the individual cells concatenated.  For numerical input, each element
@@ -83,15 +82,15 @@
 ## @seealso{cstrcat, char, strvcat}
 ## @end deftypefn
 
-function st = strcat (varargin)
+function str = strcat (varargin)
 
   if (nargin == 0)
-    st = "";
+    str = "";
   elseif (nargin == 1)
     if (iscellstr (varargin{1}))
-      st = varargin{1};
+      str = varargin{1};
     elseif (isreal (varargin{1}) || ischar (varargin{1}))
-      st = char (cellstr (varargin{1}));
+      str = char (cellstr (varargin{1}));
     else
       error ("strcat: inputs must be strings or cells of strings");
     endif
@@ -118,11 +117,11 @@
     endif
 
     ## Cellfun handles everything for us.
-    st = cellfun ("horzcat", varargin{:}, uo, false);
+    str = cellfun ("horzcat", varargin{:}, uo, false);
 
     if (allchar)
       ## If all inputs were strings, return strings.
-      st = char (st);
+      str = char (str);
     endif
   endif
 
--- a/scripts/strings/strjust.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/strings/strjust.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} strjust (@var{s})
-## @deftypefnx {} {} strjust (@var{s}, @var{pos})
+## @deftypefn  {} {@var{str} =} strjust (@var{s})
+## @deftypefnx {} {@var{str} =} strjust (@var{s}, @var{pos})
 ## Return the text, @var{s}, justified according to @var{pos}, which may
 ## be @qcode{"left"}, @qcode{"center"}, or @qcode{"right"}.
 ##
@@ -49,7 +49,7 @@
 ## @seealso{deblank, strrep, strtrim, untabify}
 ## @end deftypefn
 
-function y = strjust (s, pos = "right")
+function str = strjust (s, pos = "right")
 
   if (nargin < 1)
     print_usage ();
@@ -58,7 +58,7 @@
   endif
 
   if (isempty (s))
-    y = s;
+    str = s;
     return;
   endif
 
@@ -94,11 +94,11 @@
   endif
 
   ## Adjust the column indices.
-  jdx += shift (idx);
+  jdx += shift(idx);
 
   ## Create a blank matrix and position the nonblank characters.
-  y = repmat (" ", nr, nc);
-  y(sub2ind ([nr, nc], idx, jdx)) = s(nonbl);
+  str = repmat (" ", nr, nc);
+  str(sub2ind ([nr, nc], idx, jdx)) = s(nonbl);
 
 endfunction
 
--- a/scripts/strings/strtrim.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/strings/strtrim.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} strtrim (@var{s})
+## @deftypefn {} {@var{s} =} strtrim (@var{s})
 ## Remove leading and trailing whitespace from @var{s}.
 ##
 ## If @var{s} is a matrix, @var{strtrim} trims each row to the length of
--- a/scripts/strings/strtrunc.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/strings/strtrunc.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} strtrunc (@var{s}, @var{n})
+## @deftypefn {} {@var{s} =} strtrunc (@var{s}, @var{n})
 ## Truncate the character string @var{s} to length @var{n}.
 ##
 ## If @var{s} is a character matrix, then the number of columns is adjusted.
--- a/scripts/strings/substr.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/strings/substr.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} substr (@var{s}, @var{offset})
+## @deftypefn  {} {@var{str} =} substr (@var{s}, @var{offset})
 ## @deftypefnx {} {} substr (@var{s}, @var{offset}, @var{len})
 ## Return the substring of @var{s} which starts at character number
 ## @var{offset} and is @var{len} characters long.
@@ -52,7 +52,7 @@
 ## This function is patterned after the equivalent function in Perl.
 ## @end deftypefn
 
-function t = substr (s, offset, len)
+function str = substr (s, offset, len)
 
   if (nargin < 2)
     print_usage ();
@@ -91,7 +91,7 @@
     error ("substr: No overlap with chosen values of OFFSET and LEN");
   endif
 
-  t = s(:, offset:eos);
+  str = s(:, offset:eos);
 
 endfunction
 
--- a/scripts/strings/untabify.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/strings/untabify.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,9 +24,9 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} untabify (@var{t})
-## @deftypefnx {} {} untabify (@var{t}, @var{tw})
-## @deftypefnx {} {} untabify (@var{t}, @var{tw}, @var{deblank})
+## @deftypefn  {} {@var{str} =} untabify (@var{t})
+## @deftypefnx {} {@var{str} =} untabify (@var{t}, @var{tw})
+## @deftypefnx {} {@var{str} =} untabify (@var{t}, @var{tw}, @var{deblank})
 ## Replace TAB characters in @var{t} with spaces.
 ##
 ## The input, @var{t}, may be either a 2-D character array, or a cell array of
@@ -55,7 +55,7 @@
 ## @seealso{strjust, strsplit, deblank}
 ## @end deftypefn
 
-function s = untabify (t, tw = 8, deblank_arg = false)
+function str = untabify (t, tw = 8, deblank_arg = false)
 
   if (nargin < 1)
     print_usage ();
@@ -64,13 +64,13 @@
   endif
 
   if (ischar (t))
-    s = replace_tabs (t, tw);
+    str = replace_tabs (t, tw);
   else
-    s = cellfun (@replace_tabs, t, {tw}, "uniformoutput", false);
+    str = cellfun (@replace_tabs, t, {tw}, "uniformoutput", false);
   endif
 
   if (deblank_arg)
-    s = deblank (s);
+    str = deblank (str);
   endif
 
 endfunction
--- a/scripts/testfun/__have_feature__.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/testfun/__have_feature__.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,11 +24,11 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} __have_feature__ (feature)
+## @deftypefn {} {@var{tf} =} __have_feature__ (feature)
 ## Undocumented internal function.
 ## @end deftypefn
 
-function retval = __have_feature__ (feature)
+function tf = __have_feature__ (feature)
 
   if (strncmp (feature, "ENABLE_", 7))
     features = __octave_config_info__ ();
@@ -37,12 +37,12 @@
   endif
 
   if (iscellstr (feature))
-    retval = (all (isfield (features, feature))
+    tf = (all (isfield (features, feature))
               && all (cellfun (@(x) features.(x), feature)));
   elseif (ischar (feature))
-    retval = isfield (features, feature) && features.(feature);
+    tf = isfield (features, feature) && features.(feature);
   else
-    retval = false;
+    tf = false;
   endif
 
 endfunction
--- a/scripts/testfun/__prog_output_assert__.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/testfun/__prog_output_assert__.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,19 +24,19 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} __prog_output_assert__ (@var{str})
+## @deftypefn {} {@var{retval} =} __prog_output_assert__ (@var{str})
 ## Undocumented internal function.
 ## @end deftypefn
 
-function ret = __prog_output_assert__ (str)
+function retval = __prog_output_assert__ (str)
   global __assert_printf__ = "";
 
   if (isempty (__assert_printf__))
-    ret = isempty (str);
+    retval = isempty (str);
   elseif (__assert_printf__(end) == "\n")
-    ret = strcmp (__assert_printf__(1:(end-1)), str);
+    retval = strcmp (__assert_printf__(1:(end-1)), str);
   else
-    ret = strcmp (__assert_printf__, str);
+    retval = strcmp (__assert_printf__, str);
   endif
 
   __assert_printf__ = "";
--- a/scripts/testfun/__run_test_suite__.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/testfun/__run_test_suite__.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} __run_test_suite__ (@var{fcndirs}, @var{fixedtestdirs})
-## @deftypefnx {} {} __run_test_suite__ (@var{fcndirs}, @var{fixedtestdirs}, @var{topsrcdir}, @var{topbuilddir})
+## @deftypefn  {} {[@var{pass}, @var{fail}, @var{xfail}, @var{xbug}, @var{skip}, @var{rtskip}, @var{regress}]} __run_test_suite__ (@var{fcndirs}, @var{fixedtestdirs})
+## @deftypefnx {} {[@var{pass}, @var{fail}, @var{xfail}, @var{xbug}, @var{skip}, @var{rtskip}, @var{regress}]} __run_test_suite__ (@var{fcndirs}, @var{fixedtestdirs}, @var{topsrcdir}, @var{topbuilddir})
 ## Undocumented internal function.
 ## @end deftypefn
 
--- a/scripts/testfun/example.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/testfun/example.m	Mon Aug 29 13:58:00 2022 +0200
@@ -28,7 +28,7 @@
 ## @deftypefnx {} {} example @var{name} @var{n}
 ## @deftypefnx {} {} example ("@var{name}")
 ## @deftypefnx {} {} example ("@var{name}", @var{n})
-## @deftypefnx {} {[@var{s}, @var{idx}] =} example (@dots{})
+## @deftypefnx {} {[@var{codestr}, @var{codeidx}] =} example (@dots{})
 ##
 ## Display the code for example @var{n} associated with the function
 ## @var{name}, but do not run it.
@@ -36,14 +36,14 @@
 ## If @var{n} is not specified, all examples are displayed.
 ##
 ## When called with output arguments, the examples are returned in the form of
-## a string @var{s}, with @var{idx} indicating the ending position of the
-## various examples.
+## a string @var{codestr}, with @var{codeidx} indicating the ending position of
+## the various examples.
 ##
 ## For a complete explanation @pxref{XREFdemo,,@code{demo}}.
 ## @seealso{demo, test}
 ## @end deftypefn
 
-function [ex_code, ex_idx] = example (name, n = 0)
+function [codestr, codeidx] = example (name, n = 0)
 
   if (nargin < 1)
     print_usage ();
@@ -74,15 +74,15 @@
   if (nargout > 0)
     if (n > 0)
       if (n <= length (idx))
-        ex_code = code(idx(n):idx(n+1)-1);
-        ex_idx = [1, length(ex_code)+1];
+        codestr = code(idx(n):idx(n+1)-1);
+        codeidx = [1, length(codestr)+1];
       else
-        ex_code = "";
-        ex_idx = [];
+        codestr = "";
+        codeidx = [];
       endif
     else
-      ex_code = code;
-      ex_idx = idx;
+      codestr = code;
+      codeidx = idx;
     endif
   else
     if (n > 0)
--- a/scripts/testfun/fail.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/testfun/fail.m	Mon Aug 29 13:58:00 2022 +0200
@@ -27,10 +27,10 @@
 ## public domain.
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} fail (@var{code})
-## @deftypefnx {} {} fail (@var{code}, @var{pattern})
-## @deftypefnx {} {} fail (@var{code}, "warning")
-## @deftypefnx {} {} fail (@var{code}, "warning", @var{pattern})
+## @deftypefn  {} {@var{status} =} fail (@var{code})
+## @deftypefnx {} {@var{status} =} fail (@var{code}, @var{pattern})
+## @deftypefnx {} {@var{status} =} fail (@var{code}, "warning")
+## @deftypefnx {} {@var{status} =} fail (@var{code}, "warning", @var{pattern})
 ##
 ## Return true if @var{code} fails with an error message matching
 ## @var{pattern}, otherwise produce an error.
@@ -65,7 +65,7 @@
 ## @seealso{assert, error}
 ## @end deftypefn
 
-function retval = fail (code, pattern, warning_pattern)
+function status = fail (code, pattern, warning_pattern)
 
   if (nargin < 1)
     print_usage ();
@@ -95,7 +95,7 @@
 
   ## Allow assert (fail ())
   if (nargout)
-    retval = true;
+    status = true;
   endif
 
   if (test_warning)
--- a/scripts/testfun/oruntests.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/testfun/oruntests.m	Mon Aug 29 13:58:00 2022 +0200
@@ -119,6 +119,11 @@
     endif
     str = fread (fid, "*char")';
     fclose (fid);
+    enc = dir_encoding (fileparts (f));
+    if (! strcmp (enc, "utf-8"))
+      ## convert from input encoding to UTF-8
+      str = native2unicode (uint8 (str), enc);
+    endif
     retval = ! isempty (regexp (str,'^(?:DEFUN|DEFUN_DLD|DEFUNX)\>',
                                     'lineanchors', 'once'));
   elseif (n > 2 && strcmpi (f((end-1):end), ".m"))
@@ -138,6 +143,11 @@
 
   str = fread (fid, "*char").';
   fclose (fid);
+  enc = dir_encoding (fileparts (f));
+  if (! strcmp (enc, "utf-8"))
+    ## convert from input encoding to UTF-8
+    str = native2unicode (uint8 (str), enc);
+  endif
   retval = ! isempty (regexp (str,
                               '^%!(assert|error|fail|test|xtest|warning)',
                               'lineanchors', 'once'));
--- a/scripts/testfun/private/dump_demos.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/testfun/private/dump_demos.m	Mon Aug 29 13:58:00 2022 +0200
@@ -196,11 +196,11 @@
     demos = get_demos (fcn);
     for d = 1:numel (demos)
       idx = sprintf ("%02d", d);
-      base_fn = sprintf ("%s_%s", fcn, idx);
-      fn = sprintf ('%s.%s', base_fn, fmt);
+      base_fcn = sprintf ("%s_%s", fcn, idx);
+      fn = sprintf ('%s.%s', base_fcn, fmt);
       ## Wrap each demo in a function which create a local scope
       ## to prevent that a previous demo overwrites i or pi, for example
-      fprintf (fid, "\nfunction %s ()\n", base_fn);
+      fprintf (fid, "\nfunction %s ()\n", base_fcn);
       fprintf (fid, "    %s\n\n", demos{d});
       fprintf (fid, "end\n\n");
 
@@ -212,7 +212,7 @@
       ## here (https://savannah.gnu.org/bugs/?42557).
       fprintf (fid, "    rand ('seed', 1);\n");
       fprintf (fid, "    tic ();\n");
-      fprintf (fid, "    %s ();\n", base_fn);
+      fprintf (fid, "    %s ();\n", base_fcn);
       fprintf (fid, "    t_plot = toc ();\n");
       fprintf (fid, "    fig = (get (0, 'currentfigure'));\n");
       fprintf (fid, "    if (~ isempty (fig))\n");
@@ -229,8 +229,8 @@
       fprintf (fid, "    fprintf ('File ""%s"" already exists.\\n');\n", fn);
       fprintf (fid, "  end\n");
       fprintf (fid, "catch\n");
-      fprintf (fid, "  fprintf ('ERROR in %s: %%s\\n', lasterr ());\n", base_fn);
-      fprintf (fid, "  err_fid = fopen ('%s.err', 'w');\n", base_fn);
+      fprintf (fid, "  fprintf ('ERROR in %s: %%s\\n', lasterr ());\n", base_fcn);
+      fprintf (fid, "  err_fid = fopen ('%s.err', 'w');\n", base_fcn);
       fprintf (fid, "  fprintf (err_fid, '%%s', lasterr ());\n");
       fprintf (fid, "  fclose (err_fid);\n");
       fprintf (fid, "end\n");
--- a/scripts/testfun/test.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/testfun/test.m	Mon Aug 29 13:58:00 2022 +0200
@@ -445,7 +445,6 @@
 ### FUNCTION
 
       elseif (strcmp (__type, "function"))
-        persistent __fn = 0;
         __name_position = function_name (__block);
         if (isempty (__name_position))
           __success = false;
--- a/scripts/time/asctime.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/time/asctime.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} asctime (@var{tm_struct})
+## @deftypefn {} {@var{str} =} asctime (@var{tm_struct})
 ## Convert a time structure to a string using the following
 ## format: @qcode{"ddd mmm mm HH:MM:SS yyyy@backslashchar{}n"}.
 ##
@@ -41,13 +41,13 @@
 ## @seealso{ctime, localtime, time}
 ## @end deftypefn
 
-function retval = asctime (tm_struct)
+function str = asctime (tm_struct)
 
   if (nargin < 1)
     print_usage ();
   endif
 
-  retval = strftime ("%a %b %d %H:%M:%S %Y\n", tm_struct);
+  str = strftime ("%a %b %d %H:%M:%S %Y\n", tm_struct);
 
 endfunction
 
--- a/scripts/time/calendar.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/time/calendar.m	Mon Aug 29 13:58:00 2022 +0200
@@ -41,7 +41,7 @@
 ## @seealso{datenum, datestr}
 ## @end deftypefn
 
-function varargout = calendar (varargin)
+function c = calendar (y, m)
 
   switch (nargin)
     case 0
@@ -49,31 +49,30 @@
       y = v(1);
       m = v(2);
       d = v(3);
+
     case 1
-      v = datevec (varargin{1});
+      v = datevec (y);
       y = v(1);
       m = v(2);
       d = v(3);
+
     case 2
-      y = varargin{1};
-      m = varargin{2};
       d = [];
-    otherwise
-      print_usage ();
+
   endswitch
 
-  c = zeros (7, 6);
+  cal = zeros (7, 6);
   dayone = datenum (y, m, 1);
   ndays = eomday (y, m);
-  c(weekday (dayone) - 1 + [1:ndays]) = 1:ndays;
+  cal(weekday (dayone) - 1 + [1:ndays]) = 1:ndays;
 
   if (nargout > 0)
-    varargout{1} = c';
+    c = cal';
   else
     ## Layout the calendar days, 6 columns per day, 7 days per row.
-    str = sprintf ("    %2d    %2d    %2d    %2d    %2d    %2d    %2d\n", c);
+    str = sprintf ("    %2d    %2d    %2d    %2d    %2d    %2d    %2d\n", cal);
 
-    ## Print an asterisk before the specified date
+    ## Print an asterisk before the specified date.
     if (! isempty (d))
       pos = weekday (dayone) + d - 1;
       idx = 6*pos + fix (pos / 7.1) - ifelse (d < 10, 1, 2);
@@ -101,6 +100,3 @@
 
 %!assert ((calendar(2000,2))'(2:31), [0:29])
 %!assert ((calendar(1957,10))'(2:33), [0:31])
-
-## Test input validation
-%!error calendar (1,2,3)
--- a/scripts/time/clock.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/time/clock.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,13 +24,17 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} clock ()
+## @deftypefn  {} {@var{datevec} =} clock ()
+## @deftypefnx {} {[@var{datevec}, @var{isdst}] =} clock ()
 ## Return the current local date and time as a date vector.
 ##
 ## The date vector contains the following fields: current year, month (1-12),
 ## day (1-31), hour (0-23), minute (0-59), and second (0-61).  The seconds
 ## field has a fractional part after the decimal point for extended accuracy.
 ##
+## The optional second output @var{isdst} is true if Daylight Savings Time
+## (DST) is in effect for the system's time zone.
+##
 ## For example:
 ##
 ## @example
@@ -45,18 +49,19 @@
 ## @seealso{now, date, datevec}
 ## @end deftypefn
 
-function retval = clock ()
+function [datevec, isdst] = clock ()
 
   tm = localtime (time ());
 
-  retval = zeros (1, 6);
+  datevec = zeros (1, 6);
+  datevec(1) = tm.year + 1900;
+  datevec(2) = tm.mon + 1;
+  datevec(3) = tm.mday;
+  datevec(4) = tm.hour;
+  datevec(5) = tm.min;
+  datevec(6) = tm.sec + tm.usec / 1e6;
 
-  retval(1) = tm.year + 1900;
-  retval(2) = tm.mon + 1;
-  retval(3) = tm.mday;
-  retval(4) = tm.hour;
-  retval(5) = tm.min;
-  retval(6) = tm.sec + tm.usec / 1e6;
+  isdst = tm.isdst;
 
 endfunction
 
--- a/scripts/time/ctime.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/time/ctime.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} ctime (@var{t})
+## @deftypefn {} {@var{str} =} ctime (@var{t})
 ## Convert a value returned from @code{time} (or any other non-negative
 ## integer), to the local time and return a string of the same form as
 ## @code{asctime}.
@@ -41,13 +41,13 @@
 ## @seealso{asctime, time, localtime}
 ## @end deftypefn
 
-function retval = ctime (t)
+function str = ctime (t)
 
-  if (nargin < 1)
+  if (nargin != 1)
     print_usage ();
   endif
 
-  retval = asctime (localtime (t));
+  str = asctime (localtime (t));
 
 endfunction
 
--- a/scripts/time/date.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/time/date.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} date ()
+## @deftypefn {} {@var{str} =} date ()
 ## Return the current date as a character string in the form DD-MMM-YYYY@.
 ##
 ## For example:
@@ -38,9 +38,9 @@
 ## @seealso{now, clock, datestr, localtime}
 ## @end deftypefn
 
-function retval = date ()
+function str = date ()
 
-  retval = strftime ("%d-%b-%Y", localtime (time ()));
+  str = strftime ("%d-%b-%Y", localtime (time ()));
 
 endfunction
 
--- a/scripts/time/datevec.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/time/datevec.m	Mon Aug 29 13:58:00 2022 +0200
@@ -208,6 +208,13 @@
 
   original_f = f;   # Store for error messages.
 
+  if (any (strchr (f, "hsfYD", 1)))
+    warning ("Octave:datevec:date-format-spec", ...
+             ["datevec: Format specifiers for dates should be lower case,", ...
+              " format specifiers for time should be upper case. ", ...
+              " Possible issue with 'm' (month) and 'M' (minutes)?"]);
+  endif
+
   ## Play safe with percent signs.
   f = strrep (f, "%", "%%");
 
@@ -461,3 +468,8 @@
 %!error <multiple hour specifiers> datevec ("15:38:21.251", "HH:HH:SS")
 %!error <multiple minute specifiers> datevec ("15:38:21.251", "MM:MM:SS")
 %!error <multiple second specifiers> datevec ("15:38:21.251", "HH:SS:SS")
+%!fail ("datevec ('2015-03-31 0:00','YYYY-mm-DD HH:MM')", ...
+%!      "warning", "Format specifiers for dates should be lower case");
+%!fail ("datevec ('2015-03-31 hh:00','yyyy-mm-dd hh:MM')", ...
+%!      "warning", "format specifiers for time should be upper case");
+
--- a/scripts/time/etime.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/time/etime.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,7 +24,7 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} etime (@var{t2}, @var{t1})
+## @deftypefn {} {@var{secs} =} etime (@var{t2}, @var{t1})
 ## Return the difference in seconds between two time values returned from
 ## @code{clock} (@math{@var{t2} - @var{t1}}).
 ##
--- a/scripts/time/is_leap_year.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/time/is_leap_year.m	Mon Aug 29 13:58:00 2022 +0200
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {} is_leap_year ()
-## @deftypefnx {} {} is_leap_year (@var{year})
+## @deftypefn  {} {@var{tf} =} is_leap_year ()
+## @deftypefnx {} {@var{tf} =} is_leap_year (@var{year})
 ## Return true if @var{year} is a leap year and false otherwise.
 ##
 ## If no year is specified, @code{is_leap_year} uses the current year.
@@ -41,14 +41,14 @@
 ## @seealso{weekday, eomday, calendar}
 ## @end deftypefn
 
-function retval = is_leap_year (year)
+function tf = is_leap_year (year)
 
   if (nargin == 0)
     t = clock ();
     year = t(1);
   endif
 
-  retval = (rem (year, 4) == 0 & rem (year, 100) != 0) | (rem (year, 400) == 0);
+  tf = (rem (year, 4) == 0 & rem (year, 100) != 0) | (rem (year, 400) == 0);
 
 endfunction
 
--- a/scripts/web/webwrite.m	Sun Aug 28 22:44:49 2022 +0200
+++ b/scripts/web/webwrite.m	Mon Aug 29 13:58:00 2022 +0200
@@ -92,7 +92,12 @@
     error ("webwrite: DATA must be a string");
   elseif (nargs == 1)
     if (ischar (varargin{1}) && isrow (varargin{1}))
-      param = strsplit (varargin{1}, {"=", "&"});
+      param = regexp (varargin{1}, '([^=]*)=([^&]*)&?', 'tokens');
+      if (isempty (param) || isempty (param{1}))
+        error ("webwrite: DATA not a valid query string");
+      else
+        param = [param{:}];
+      endif
       response = __restful_service__ (url, param, options);
     elseif (! iscellstr (varargin))
       error ("webwrite: DATA must be a string");
--- a/test/Makefile.am	Sun Aug 28 22:44:49 2022 +0200
+++ b/test/Makefile.am	Mon Aug 29 13:58:00 2022 +0200
@@ -114,6 +114,7 @@
 include colon-op/module.mk
 include ctor-vs-method/module.mk
 include fcn-handle/module.mk
+include file-encoding/module.mk
 include json/module.mk
 include jupyter-notebook/module.mk
 include local-functions/module.mk
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/file-encoding/.oct-config	Mon Aug 29 13:58:00 2022 +0200
@@ -0,0 +1,1 @@
+encoding=windows-1252
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/file-encoding/CP1251/.oct-config	Mon Aug 29 13:58:00 2022 +0200
@@ -0,0 +1,1 @@
+encoding=windows-1251
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/file-encoding/CP1251/test_CP1251.m	Mon Aug 29 13:58:00 2022 +0200
@@ -0,0 +1,37 @@
+########################################################################
+##
+## Copyright (C) 2022 The Octave Project Developers
+##
+## See the file COPYRIGHT.md in the top-level directory of this
+## distribution or <https://octave.org/copyright/>.
+##
+## This program is free software; you can redistribute it and/or
+## modify it under the terms of the GNU General Public License as
+## published by the Free Software Foundation; either version 3 of the
+## License, or (at your option) any later version.
+##
+## This program is distributed in the hope that it will be useful, but
+## WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+## General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with this program; if not, see <http://www.gnu.org/licenses/>.
+##
+########################################################################
+
+## -*- texinfo -*-
+## @deftypefn {} {} test_CP1251 ()
+## Test function with some characters from CP1251
+##
+## ÄÖÜäöü ŠŽšž
+##
+## @end deftypefn
+
+function test_CP1251 ()
+  help ("test_CP1251");
+endfunction
+
+%!assert (double ("ÄÖÜäöü ŠŽšž"),
+%!        [208 148 208 166 208 172 208 180 209 134 209 140 32 ...
+%!         208 137 208 139 209 153 209 155])
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/file-encoding/file-encoding.tst	Mon Aug 29 13:58:00 2022 +0200
@@ -0,0 +1,146 @@
+########################################################################
+##
+## Copyright (C) 2022 The Octave Project Developers
+##
+## See the file COPYRIGHT.md in the top-level directory of this
+## distribution or <https://octave.org/copyright/>.
+##
+## This file is part of Octave.
+##
+## Octave is free software: you can redistribute it and/or modify it
+## under the terms of the GNU General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## Octave is distributed in the hope that it will be useful, but
+## WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with Octave; see the file COPYING.  If not, see
+## <https://www.gnu.org/licenses/>.
+##
+########################################################################
+
+## Note: The cache of dir_encoding from .oct-config files in the load path
+## persists even after removing the folder from the load path.
+## Explictily, delete it when removing the path.
+
+## test file in current directory
+
+%!assert (dir_encoding ("."), "windows-1252")
+%!assert (dir_encoding (pwd ()), "windows-1252")
+
+%!test
+%! help_str = get_help_text ("test_CP1252");
+%! ## The help text contains the string "ÄÖÜäöü ŠŽšž".  Compare to the
+%! ## corresponding UTF-8 byte sequence to make sure this test is independent
+%! ## of how this .tst file is interpreted.
+%! ref_str = char ([195 132 195 150 195 156 195 164 195 182 195 188 32 ...
+%!                  197 160 197 189 197 161 197 190]);
+%! assert (strfind (help_str, ref_str));
+
+
+## test file in load path (relative)
+
+%!test
+%! path_orig = path ();
+%! unwind_protect
+%!   addpath ("CP1251");
+%!   assert (dir_encoding ("CP1251"), "windows-1251");
+%!   assert (dir_encoding (fullfile (pwd (), "CP1251")), "windows-1251");
+%! unwind_protect_cleanup
+%!   path (path_orig);
+%!   dir_encoding (canonicalize_file_name ("CP1251"), "delete");
+%! end_unwind_protect
+
+%!test
+%! path_orig = path ();
+%! unwind_protect
+%!   addpath ("CP1251");
+%!   help_str = get_help_text ("test_CP1251");
+%!   ## The help text contains the string "ДЦЬдць ЉЋљћ".  Compare to the
+%!   ## corresponding UTF-8 byte sequence to make sure this test is independent
+%!   ## of how this .tst of how this .tst file is interpreted.
+%!   ref_str = char ([208 148 208 166 208 172 208 180 209 134 209 140 32 ...
+%!                    208 137 208 139 209 153 209 155]);
+%!   assert (strfind (help_str, ref_str));
+%! unwind_protect_cleanup
+%!   path (path_orig);
+%!   dir_encoding (canonicalize_file_name ("CP1251"), "delete");
+%! end_unwind_protect
+
+
+## test file in load path (absolute)
+
+%!test
+%! clear all;  # make sure files are re-parsed
+%! path_orig = path ();
+%! unwind_protect
+%!   new_path = canonicalize_file_name ("CP1251");
+%!   addpath (new_path);
+%!   assert (dir_encoding (new_path), "windows-1251");
+%!   assert (dir_encoding ("CP1251"), "windows-1251");
+%!   assert (dir_encoding (fullfile (pwd (), "CP1251")), "windows-1251");
+%! unwind_protect_cleanup
+%!   path (path_orig);
+%!   dir_encoding (canonicalize_file_name ("CP1251"), "delete");
+%! end_unwind_protect
+
+%!test
+%! clear all;  # make sure files are re-parsed
+%! path_orig = path ();
+%! unwind_protect
+%!   addpath (canonicalize_file_name ("CP1251"));
+%!   help_str = get_help_text ("test_CP1251");
+%!   ## The help text contains the string "ДЦЬдць ЉЋљћ".  Compare to the UTF-8
+%!   ## byte sequence to make sure this test is independent of how this .tst
+%!   ## file is interpreted.
+%!   ref_str = char ([208 148 208 166 208 172 208 180 209 134 209 140 32 ...
+%!                    208 137 208 139 209 153 209 155]);
+%!   assert (strfind (help_str, ref_str));
+%! unwind_protect_cleanup
+%!   path (path_orig);
+%!   dir_encoding (canonicalize_file_name ("CP1251"), "delete");
+%! end_unwind_protect
+
+
+## oruntests with file in current folder with .oct-config file
+%!test <*62780>
+%! ## wrap in "evalc" to suppress output to the log
+%! evalc ('oruntests (".");');
+
+## oruntests with file in different folder (not in load path) with
+## "dir_encoding"
+%!test <*62780>
+%! unwind_protect
+%!   dir_encoding (canonicalize_file_name ("CP1251"), "windows-1251");
+%!   ## use "evalc" to suppress output to the log
+%!   evalc ('oruntests ("CP1251");');
+%! unwind_protect_cleanup
+%!   dir_encoding (canonicalize_file_name ("CP1251"), "delete");
+%! end_unwind_protect
+
+## oruntests with file in different folder (not in load path) with
+## "__mfile_encoding__"
+%!test <*62780>
+%! old_mfile_encoding = __mfile_encoding__ ("windows-1251");
+%! unwind_protect
+%!   ## use "evalc" to suppress output to the log
+%!   evalc ('oruntests ("CP1251");');
+%! unwind_protect_cleanup
+%!   __mfile_encoding__ (old_mfile_encoding);
+%! end_unwind_protect
+
+## oruntests with file in different folder with .oct-config file (in load path)
+%!test <*62780>
+%! path_orig = path ();
+%! unwind_protect
+%!   addpath (canonicalize_file_name ("CP1251"));
+%!   ## use "evalc" to suppress output to the log
+%!   evalc ('oruntests ("CP1251");');
+%! unwind_protect_cleanup
+%!   path (path_orig);
+%!   dir_encoding (canonicalize_file_name ("CP1251"), "delete");
+%! end_unwind_protect
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/file-encoding/module.mk	Mon Aug 29 13:58:00 2022 +0200
@@ -0,0 +1,8 @@
+file_encoding_TEST_FILES = \
+    %reldir%/.oct-config \
+    %reldir%/file-encoding.tst \
+    %reldir%/test_CP1252.m \
+    %reldir%/CP1251/.oct-config \
+    %reldir%/CP1251/test_CP1251.m
+
+TEST_FILES += $(file_encoding_TEST_FILES)
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/file-encoding/test_CP1252.m	Mon Aug 29 13:58:00 2022 +0200
@@ -0,0 +1,37 @@
+########################################################################
+##
+## Copyright (C) 2022 The Octave Project Developers
+##
+## See the file COPYRIGHT.md in the top-level directory of this
+## distribution or <https://octave.org/copyright/>.
+##
+## This program is free software; you can redistribute it and/or
+## modify it under the terms of the GNU General Public License as
+## published by the Free Software Foundation; either version 3 of the
+## License, or (at your option) any later version.
+##
+## This program is distributed in the hope that it will be useful, but
+## WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+## General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with this program; if not, see <http://www.gnu.org/licenses/>.
+##
+########################################################################
+
+## -*- texinfo -*-
+## @deftypefn {} {} test_CP1252 ()
+## Test function with some characters from CP1252
+##
+## ÄÖÜäöü ŠŽšž
+##
+## @end deftypefn
+
+function test_CP1252 ()
+  help ("test_CP1252");
+endfunction
+
+%!assert (double ("ÄÖÜäöü ŠŽšž"),
+%!        [195 132 195 150 195 156 195 164 195 182 195 188 32 ...
+%!         197 160 197 189 197 161 197 190])
--- a/test/pkg/pkg.tst	Sun Aug 28 22:44:49 2022 +0200
+++ b/test/pkg/pkg.tst	Mon Aug 29 13:58:00 2022 +0200
@@ -73,7 +73,9 @@
 %!testif HAVE_Z
 %! for i = 1:numel (mfile_pkg_name)
 %!   silent_pkg_install (mfile_pkg_tgz{i});
-%!   system (["chmod -Rf u+w '" prefix "'"]);   ## FIXME: Work around bug #53578
+%!   if (isunix ())
+%!     system (["chmod -Rf u+w '" prefix "'"]);   ## FIXME: Work around bug #53578
+%!   endif
 %!   pkg ("uninstall", mfile_pkg_name{i});
 %! endfor
 %!
@@ -83,7 +85,9 @@
 %!testif HAVE_Z
 %! for i = 1:numel (mfile_pkg_name)
 %!   silent_pkg_install ("-local", mfile_pkg_tgz{i});
-%!   system (["chmod -Rf u+w '" prefix "'"]);   ## FIXME: Work around bug #53578
+%!   if (isunix)
+%!     system (["chmod -Rf u+w '" prefix "'"]);   ## FIXME: Work around bug #53578
+%!   endif
 %!   pkg ("uninstall", mfile_pkg_name{i});
 %! endfor
 
@@ -111,7 +115,9 @@
 %!     pkg ("load", name);
 %!     pkg ("unload", name);
 %!   unwind_protect_cleanup
-%!     system (["chmod -Rf u+w '" prefix "'"]); ## FIXME: Work around bug #53578
+%!     if (isunix)
+%!       system (["chmod -Rf u+w '" prefix "'"]); ## FIXME: Work around bug #53578
+%!     endif
 %!     pkg ("uninstall", name);
 %!   end_unwind_protect
 %! endfor
@@ -138,7 +144,9 @@
 %! [desc, flag] = pkg ("describe", mfile_pkg_name{1});
 %! ## FIXME: this only tests that the describe command runs,
 %! ##        not that the output is in anyway correct.
-%! system (["chmod -Rf u+w '" prefix "'"]);     ## FIXME: Work around bug #53578
+%! if (isunix)
+%!   system (["chmod -Rf u+w '" prefix "'"]);     ## FIXME: Work around bug #53578
+%! endif
 %! pkg ("uninstall", mfile_pkg_name{1});
 
 ## -verbose