--- a/scripts/legacy/@inline/argnames.m	Wed Apr 06 16:30:23 2022 -0700
+++ b/scripts/legacy/@inline/argnames.m	Wed Apr 06 21:25:58 2022 -0700
@@ -24,14 +24,17 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {@var{args} =} argnames (@var{fcn})
+## @deftypefn {} {@var{args} =} argnames (@var{fobj})
 ## Return a cell array of character strings containing the names of the
-## arguments of the inline function @var{fcn}.
-## @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 (fcn)
+function args = argnames (fobj)
 
-  args = fcn.args;
+  args = fobj.args;
 
 endfunction

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/scripts/legacy/@inline/cat.m	Wed Apr 06 21:25:58 2022 -0700
@@ -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	Wed Apr 06 16:30:23 2022 -0700
+++ b/scripts/legacy/@inline/char.m	Wed Apr 06 21:25:58 2022 -0700
@@ -24,16 +24,17 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {@var{fcnstr} =} char (@var{fcn})
-## Return a character string representing the inline function @var{fcn}.
+## @deftypefn {} {@var{fcnstr} =} char (@var{fobj})
+## Return a character string representing the inline function object
+## @var{fobj}.
 ##
-## Note that @code{char (@var{fcn})} is equivalent to
-## @code{formula (@var{fcn})}.
-## @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 fcnstr = char (obj)
+function fcnstr = char (fobj)
 
-  fcnstr = obj.expr;
+  fcnstr = fobj.expr;
 
 endfunction

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/scripts/legacy/@inline/disp.m	Wed Apr 06 21:25:58 2022 -0700
@@ -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	Wed Apr 06 21:25:58 2022 -0700
@@ -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	Wed Apr 06 16:30:23 2022 -0700
+++ b/scripts/legacy/@inline/feval.m	Wed Apr 06 21:25:58 2022 -0700
@@ -23,9 +23,9 @@
 ##
 ########################################################################
 
-function retval = feval (fcn, varargin)
+function retval = feval (fobj, varargin)
 
-  fh = eval (sprintf ("@(%s) %s", strjoin (fcn.args, ","), fcn.expr));
+  fh = eval (sprintf ("@(%s) %s", strjoin (fobj.args, ","), fobj.expr));
 
   retval = fh (varargin{:});
 

--- a/scripts/legacy/@inline/formula.m	Wed Apr 06 16:30:23 2022 -0700
+++ b/scripts/legacy/@inline/formula.m	Wed Apr 06 21:25:58 2022 -0700
@@ -24,12 +24,12 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {@var{fcnstr} =} formula (@var{fcn})
-## Return a character string representing the inline function @var{fcn}.
+## @deftypefn {} {@var{fcnstr} =} formula (@var{fobj})
+## Return a character string representing the inline function @var{fobj}.
 ##
-## Note that @code{char (@var{fcn})} is equivalent to
-## @code{formula (@var{fcn})}.
-## @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 fcnstr = formula (obj)

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/scripts/legacy/@inline/horzcat.m	Wed Apr 06 21:25:58 2022 -0700
@@ -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	Wed Apr 06 16:30:23 2022 -0700
+++ b/scripts/legacy/@inline/inline.m	Wed Apr 06 21:25:58 2022 -0700
@@ -37,7 +37,7 @@
 ## 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.

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/scripts/legacy/@inline/nargin.m	Wed Apr 06 21:25:58 2022 -0700
@@ -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.numArgs;
+
+endfunction

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/scripts/legacy/@inline/nargout.m	Wed Apr 06 21:25:58 2022 -0700
@@ -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	Wed Apr 06 16:30:23 2022 -0700
+++ b/scripts/legacy/@inline/subsref.m	Wed Apr 06 21:25:58 2022 -0700
@@ -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	Wed Apr 06 21:25:58 2022 -0700
@@ -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	Wed Apr 06 16:30:23 2022 -0700
+++ b/scripts/legacy/@inline/vectorize.m	Wed Apr 06 21:25:58 2022 -0700
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {@var{vfcn} =} vectorize (@var{fcn})
-## Create a vectorized version of the inline function @var{fcn} 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.
 ##
@@ -35,23 +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 function!  Use
-## function handles instead!
+function vfcn = vectorize (fobj)
 
-function vfcn = vectorize (fcn)
-
-  vfcn = inline (__vectorize__ (fcn.expr));
+  vfcn = inline (__vectorize__ (fobj.expr));
 
 endfunction

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/scripts/legacy/@inline/vertcat.m	Wed Apr 06 21:25:58 2022 -0700
@@ -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	Wed Apr 06 16:30:23 2022 -0700
+++ b/scripts/legacy/__vectorize__.m	Wed Apr 06 21:25:58 2022 -0700
@@ -28,6 +28,11 @@
 ## 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/module.mk	Wed Apr 06 16:30:23 2022 -0700
+++ b/scripts/legacy/module.mk	Wed Apr 06 21:25:58 2022 -0700
@@ -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/vectorize.m	Wed Apr 06 16:30:23 2022 -0700
+++ b/scripts/legacy/vectorize.m	Wed Apr 06 21:25:58 2022 -0700
@@ -34,11 +34,6 @@
 ## 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 vfcn = vectorize (fcn)
 
   persistent warned = false;