# HG changeset patch
# User Rik <rik@octave.org>
# Date 1453398470 28800
# Node ID df789122470905908f1f549fda31dff450755146
# Parent  ba0a4b4f021da2e85c1da6049ddabc819c340383
maint: Use "return ovl (...)" in DEFUN macros.
* cellfun.cc, data.cc, debug.cc, defaults.cc, det.cc, dirfns.cc, dlmread.cc,
error.cc, file-io.cc, getrusage.cc, graphics.cc, help.cc, input.cc, inv.cc,
kron.cc, load-path.cc, pager.cc, pinv.cc, rand.cc, strfns.cc, urlwrite.cc,
chol.cc, ov-classdef.cc, ov-struct.cc: Use "return ovl (...)" in DEFUN macros,
rather than "return octave_value (...)".

diff -r ba0a4b4f021d -r df7891224709 libinterp/corefcn/cellfun.cc
--- a/libinterp/corefcn/cellfun.cc	Thu Jan 21 11:24:36 2016 -0500
+++ b/libinterp/corefcn/cellfun.cc	Thu Jan 21 09:47:50 2016 -0800
@@ -2343,7 +2343,7 @@
         }
     }
 
-  return octave_value (retcell);
+  return ovl (retcell);
 }
 
 /*
diff -r ba0a4b4f021d -r df7891224709 libinterp/corefcn/data.cc
--- a/libinterp/corefcn/data.cc	Thu Jan 21 11:24:36 2016 -0500
+++ b/libinterp/corefcn/data.cc	Thu Jan 21 09:47:50 2016 -0800
@@ -2423,7 +2423,7 @@
   if (dim < 0)
     error ("cat: DIM must be a valid dimension");
 
-  return octave_value (do_cat (args.slice (1, args.length () - 1), dim, "cat"));
+  return ovl (do_cat (args.slice (1, args.length () - 1), dim, "cat"));
 }
 
 /*
@@ -2653,7 +2653,7 @@
   if (args.length () != 1)
     print_usage ();
 
-  return octave_value (args(0).length ());
+  return ovl (args(0).length ());
 }
 
 DEFUN (ndims, args, ,
@@ -2676,7 +2676,7 @@
   if (args.length () != 1)
     print_usage ();
 
-  return octave_value (args(0).ndims ());
+  return ovl (args(0).ndims ());
 }
 
 DEFUN (numel, args, ,
@@ -2863,7 +2863,7 @@
   if (args.length () != 1)
     print_usage ();
 
-  return octave_value (args(0).nnz ());
+  return ovl (args(0).nnz ());
 }
 
 DEFUN (nzmax, args, ,
@@ -2880,7 +2880,7 @@
   if (args.length () != 1)
     print_usage ();
 
-  return octave_value (args(0).nzmax ());
+  return ovl (args(0).nzmax ());
 }
 
 DEFUN (rows, args, ,
@@ -2893,7 +2893,7 @@
   if (args.length () != 1)
     print_usage ();
 
-  return octave_value (args(0).rows ());
+  return ovl (args(0).rows ());
 }
 
 /*
@@ -2933,7 +2933,7 @@
   if (args.length () != 1)
     print_usage ();
 
-  return octave_value (args(0).columns ());
+  return ovl (args(0).columns ());
 }
 
 DEFUN (sum, args, ,
@@ -3215,7 +3215,7 @@
   if (args.length () != 1)
     print_usage ();
 
-  return octave_value (args(0).is_bool_type ());
+  return ovl (args(0).is_bool_type ());
 }
 
 DEFALIAS (isbool, islogical);
@@ -3247,7 +3247,7 @@
   if (args.length () != 1)
     print_usage ();
 
-  return octave_value (args(0).is_integer_type ());
+  return ovl (args(0).is_integer_type ());
 }
 
 DEFUN (iscomplex, args, ,
@@ -3260,7 +3260,7 @@
   if (args.length () != 1)
     print_usage ();
 
-  return octave_value (args(0).is_complex_type ());
+  return ovl (args(0).is_complex_type ());
 }
 
 DEFUN (isfloat, args, ,
@@ -3275,7 +3275,7 @@
   if (args.length () != 1)
     print_usage ();
 
-  return octave_value (args(0).is_float_type ());
+  return ovl (args(0).is_float_type ());
 }
 
 // FIXME: perhaps this should be implemented with an
@@ -3558,7 +3558,7 @@
   if (args.length () != 1)
     print_usage ();
 
-  return octave_value (args(0).is_real_type ());
+  return ovl (args(0).is_real_type ());
 }
 
 DEFUN (isempty, args, ,
@@ -3572,7 +3572,7 @@
   if (args.length () != 1)
     print_usage ();
 
-  return octave_value (args(0).is_empty ());
+  return ovl (args(0).is_empty ());
 }
 
 /*
@@ -3593,7 +3593,7 @@
   if (args.length () != 1)
     print_usage ();
 
-  return octave_value (args(0).is_numeric_type ());
+  return ovl (args(0).is_numeric_type ());
 }
 
 /*
@@ -3622,7 +3622,7 @@
   if (args.length () != 1)
     print_usage ();
 
-  return octave_value (args(0).numel () == 1);
+  return ovl (args(0).numel () == 1);
 }
 
 /*
@@ -3659,7 +3659,7 @@
 
   dim_vector sz = args(0).dims ();
 
-  return octave_value (sz.length () == 2 && (sz(0) == 1 || sz(1) == 1));
+  return ovl (sz.length () == 2 && (sz(0) == 1 || sz(1) == 1));
 }
 
 /*
@@ -3694,7 +3694,7 @@
 
   dim_vector sz = args(0).dims ();
 
-  return octave_value (sz.length () == 2 && sz(0) == 1);
+  return ovl (sz.length () == 2 && sz(0) == 1);
 }
 
 /*
@@ -3739,7 +3739,7 @@
 
   dim_vector sz = args(0).dims ();
 
-  return octave_value (sz.length () == 2 && sz(1) == 1);
+  return ovl (sz.length () == 2 && sz(1) == 1);
 }
 
 /*
@@ -3783,7 +3783,7 @@
 
   dim_vector sz = args(0).dims ();
 
-  return octave_value (sz.length () == 2 && sz(0) >= 0 && sz(1) >= 0);
+  return ovl (sz.length () == 2 && sz(0) >= 0 && sz(1) >= 0);
 }
 
 /*
@@ -3826,7 +3826,7 @@
 
   dim_vector sz = args(0).dims ();
 
-  return octave_value (sz.length () == 2 && sz(0) == sz(1));
+  return ovl (sz.length () == 2 && sz(0) == sz(1));
 }
 
 /*
@@ -5510,7 +5510,7 @@
   if (args.length () != 1)
     print_usage ();
 
-  return octave_value (args(0).squeeze ());
+  return ovl (args(0).squeeze ());
 }
 
 DEFUN (full, args, ,
@@ -5524,7 +5524,7 @@
   if (args.length () != 1)
     print_usage ();
 
-  return octave_value (args(0).full_value ());
+  return ovl (args(0).full_value ());
 }
 
 // Compute various norms of the vector X.
@@ -6709,6 +6709,7 @@
 
   Array<octave_idx_type> idx = arg.sort_rows_idx (smode);
 
+  // This cannot be ovl(), relies on special overloaded octave_value call.
   return octave_value (idx, true, true);
 }
 
@@ -7859,7 +7860,7 @@
       retval = retval.reshape (dims);
     }
 
-  return octave_value (retval);
+  return ovl (retval);
 }
 
 /*
diff -r ba0a4b4f021d -r df7891224709 libinterp/corefcn/debug.cc
--- a/libinterp/corefcn/debug.cc	Thu Jan 21 11:24:36 2016 -0500
+++ b/libinterp/corefcn/debug.cc	Thu Jan 21 09:47:50 2016 -0800
@@ -1432,7 +1432,7 @@
   if (args.length () != 0)
     print_usage ();
 
-  return octave_value (Vdebugging);
+  return ovl (Vdebugging);
 }
 
 DEFUN (__db_next_breakpoint_quiet__, args, ,
diff -r ba0a4b4f021d -r df7891224709 libinterp/corefcn/defaults.cc
--- a/libinterp/corefcn/defaults.cc	Thu Jan 21 11:24:36 2016 -0500
+++ b/libinterp/corefcn/defaults.cc	Thu Jan 21 09:47:50 2016 -0800
@@ -587,7 +587,7 @@
   if (args.length () != 0)
     print_usage ();
 
-  return octave_value (Voctave_home);
+  return ovl (Voctave_home);
 }
 
 /*
@@ -605,7 +605,7 @@
   if (args.length () != 0)
     print_usage ();
 
-  return octave_value (OCTAVE_VERSION);
+  return ovl (OCTAVE_VERSION);
 }
 
 /*
diff -r ba0a4b4f021d -r df7891224709 libinterp/corefcn/det.cc
--- a/libinterp/corefcn/det.cc	Thu Jan 21 11:24:36 2016 -0500
+++ b/libinterp/corefcn/det.cc	Thu Jan 21 09:47:50 2016 -0800
@@ -73,13 +73,13 @@
   octave_idx_type nc = arg.columns ();
 
   if (nr == 0 && nc == 0)
-    return octave_value (1.0);
+    return ovl (1.0);
 
   int arg_is_empty = empty_arg ("det", nr, nc);
   if (arg_is_empty < 0)
     return ovl ();
   if (arg_is_empty > 0)
-    return octave_value (1.0);
+    return ovl (1.0);
 
   if (nr != nc)
     err_square_matrix_required ("det", "A");
diff -r ba0a4b4f021d -r df7891224709 libinterp/corefcn/dirfns.cc
--- a/libinterp/corefcn/dirfns.cc	Thu Jan 21 11:24:36 2016 -0500
+++ b/libinterp/corefcn/dirfns.cc	Thu Jan 21 09:47:50 2016 -0800
@@ -158,7 +158,7 @@
 @seealso{cd, dir, ls, mkdir, rmdir}\n\
 @end deftypefn")
 {
-  return octave_value (octave_env::get_current_directory ());
+  return ovl (octave_env::get_current_directory ());
 }
 
 DEFUN (readdir, args, ,
@@ -483,7 +483,7 @@
 
   glob_match pattern (file_ops::tilde_expand (pat));
 
-  return octave_value (Cell (pattern.glob ()));
+  return ovl (Cell (pattern.glob ()));
 }
 
 /*
diff -r ba0a4b4f021d -r df7891224709 libinterp/corefcn/dlmread.cc
--- a/libinterp/corefcn/dlmread.cc	Thu Jan 21 11:24:36 2016 -0500
+++ b/libinterp/corefcn/dlmread.cc	Thu Jan 21 09:47:50 2016 -0800
@@ -458,9 +458,9 @@
     }
 
   if (iscmplx)
-    return octave_value (cdata);
+    return ovl (cdata);
   else
-    return octave_value (rdata);
+    return ovl (rdata);
 }
 
 /*
diff -r ba0a4b4f021d -r df7891224709 libinterp/corefcn/error.cc
--- a/libinterp/corefcn/error.cc	Thu Jan 21 11:24:36 2016 -0500
+++ b/libinterp/corefcn/error.cc	Thu Jan 21 09:47:50 2016 -0800
@@ -1930,7 +1930,7 @@
         error ("lasterror: argument must be a structure or a string");
     }
 
-  return octave_value (err);
+  return ovl (err);
 }
 
 DEFUN (lasterr, args, nargout,
diff -r ba0a4b4f021d -r df7891224709 libinterp/corefcn/file-io.cc
--- a/libinterp/corefcn/file-io.cc	Thu Jan 21 11:24:36 2016 -0500
+++ b/libinterp/corefcn/file-io.cc	Thu Jan 21 09:47:50 2016 -0800
@@ -248,7 +248,7 @@
   if (args.length () != 1)
     print_usage ();
 
-  return octave_value (octave_stream_list::remove (args(0), "fclose"));
+  return ovl (octave_stream_list::remove (args(0), "fclose"));
 }
 
 DEFUN (fclear, args, ,
@@ -741,7 +741,7 @@
 
   octave_value origin_arg = (nargin == 3) ? args(2) : octave_value (-1.0);
 
-  return octave_value (os.seek (args(1), origin_arg));
+  return ovl (os.seek (args(1), origin_arg));
 }
 
 DEFUN (ftell, args, ,
@@ -757,7 +757,7 @@
 
   octave_stream os = octave_stream_list::lookup (args(0), "ftell");
 
-  return octave_value (os.tell ());
+  return ovl (os.tell ());
 }
 
 DEFUN (fprintf, args, nargout,
@@ -815,7 +815,7 @@
   result = os.printf (args(fmt_n), tmp_args, who);
 
   if (nargout > 0)
-    return octave_value (result);
+    return ovl (result);
   else
     return ovl ();
 }
@@ -889,7 +889,7 @@
 
   octave_stream os = octave_stream_list::lookup (args(0), who);
 
-  return octave_value (os.puts (args(1), who));
+  return ovl (os.puts (args(1), who));
 }
 
 DEFUN (puts, args, ,
@@ -910,7 +910,7 @@
   if (args.length () != 1)
     print_usage ();
 
-  return octave_value (stdout_stream.puts (args(0), who));
+  return ovl (stdout_stream.puts (args(0), who));
 }
 
 DEFUN (sprintf, args, ,
@@ -1509,7 +1509,7 @@
       skip = 0;
     }
 
-  return octave_value (do_fwrite (os, data, prec, skip, arch));
+  return ovl (do_fwrite (os, data, prec, skip, arch));
 }
 
 DEFUNX ("feof", Ffeof, args, ,
@@ -1529,7 +1529,7 @@
 
   octave_stream os = octave_stream_list::lookup (args(0), "feof");
 
-  return octave_value (os.eof () ? 1.0 : 0.0);
+  return ovl (os.eof () ? 1.0 : 0.0);
 }
 
 DEFUNX ("ferror", Fferror, args, ,
@@ -1652,7 +1652,7 @@
   if (args.length () != 1)
     print_usage ();
 
-  return octave_value (octave_stream_list::remove (args(0), "pclose"));
+  return ovl (octave_stream_list::remove (args(0), "pclose"));
 }
 
 DEFUN (tempname, args, ,
@@ -1690,7 +1690,7 @@
   if (nargin > 1)
     pfx = args(1).xstring_value ("tempname: PREFIX must be a string");
 
-  return octave_value (octave_tempnam (dir, pfx));
+  return ovl (octave_tempnam (dir, pfx));
 }
 
 /*
@@ -1948,7 +1948,7 @@
   if (args.length () != 0)
     print_usage ();
 
-  return octave_value (get_P_tmpdir ());
+  return ovl (get_P_tmpdir ());
 }
 
 // NOTE: the values of SEEK_SET, SEEK_CUR, and SEEK_END have to be
diff -r ba0a4b4f021d -r df7891224709 libinterp/corefcn/getrusage.cc
--- a/libinterp/corefcn/getrusage.cc	Thu Jan 21 11:24:36 2016 -0500
+++ b/libinterp/corefcn/getrusage.cc	Thu Jan 21 09:47:50 2016 -0800
@@ -202,7 +202,7 @@
 
 #endif
 
-  return octave_value (m);
+  return ovl (m);
 }
 
 /*
diff -r ba0a4b4f021d -r df7891224709 libinterp/corefcn/graphics.cc
--- a/libinterp/corefcn/graphics.cc	Thu Jan 21 11:24:36 2016 -0500
+++ b/libinterp/corefcn/graphics.cc	Thu Jan 21 09:47:50 2016 -0800
@@ -10062,9 +10062,9 @@
   octave_idx_type vals_len = vals.numel ();
 
   if (vals_len > 1)
-    return octave_value (vals);
+    return ovl (vals);
   else if (vals_len == 1)
-    return octave_value (vals(0));
+    return ovl (vals(0));
   else
     return ovl ();
 }
@@ -10275,7 +10275,7 @@
 
   double h = args(0).xdouble_value ("__calc_dimensions__: first argument must be a graphics handle");
 
-  return octave_value (calc_dimensions (gh_manager::get_object (h)));
+  return ovl (calc_dimensions (gh_manager::get_object (h)));
 }
 
 DEFUN (__go_axes__, args, ,
@@ -10484,7 +10484,7 @@
   if (args.length () > 0)
     show_hidden = args(0).bool_value ();
 
-  return octave_value (gh_manager::handle_list (show_hidden));
+  return ovl (gh_manager::handle_list (show_hidden));
 }
 
 DEFUN (__go_figure_handles__, args, ,
@@ -10500,7 +10500,7 @@
   if (args.length () > 0)
     show_hidden = args(0).bool_value ();
 
-  return octave_value (gh_manager::figure_handle_list (show_hidden));
+  return ovl (gh_manager::figure_handle_list (show_hidden));
 }
 
 DEFUN (__go_execute_callback__, args, ,
@@ -10651,7 +10651,7 @@
 {
   gh_manager::auto_lock guard;
 
-  return octave_value (gtk_manager::available_toolkits_list ());
+  return ovl (gtk_manager::available_toolkits_list ());
 }
 
 DEFUN (register_graphics_toolkit, args, ,
@@ -10682,7 +10682,7 @@
 {
   gh_manager::auto_lock guard;
 
-  return octave_value (gtk_manager::loaded_toolkits_list ());
+  return ovl (gtk_manager::loaded_toolkits_list ());
 }
 
 DEFUN (drawnow, args, ,
diff -r ba0a4b4f021d -r df7891224709 libinterp/corefcn/help.cc
--- a/libinterp/corefcn/help.cc	Thu Jan 21 11:24:36 2016 -0500
+++ b/libinterp/corefcn/help.cc	Thu Jan 21 09:47:50 2016 -0800
@@ -1167,7 +1167,7 @@
 Undocumented internal function.\n\
 @end deftypefn")
 {
-  return octave_value (Cell (names (operators_map)));
+  return ovl (Cell (names (operators_map)));
 }
 
 // Return a cell array of strings containing the names of all
@@ -1179,7 +1179,7 @@
 Undocumented internal function.\n\
 @end deftypefn")
 {
-  return octave_value (Cell (names (keywords_map)));
+  return ovl (Cell (names (keywords_map)));
 }
 
 // Return a cell array of strings containing the names of all builtin
@@ -1193,7 +1193,7 @@
 {
   const string_vector bif = symbol_table::built_in_function_names ();
 
-  return octave_value (Cell (bif));
+  return ovl (Cell (bif));
 }
 
 static std::string
diff -r ba0a4b4f021d -r df7891224709 libinterp/corefcn/input.cc
--- a/libinterp/corefcn/input.cc	Thu Jan 21 11:24:36 2016 -0500
+++ b/libinterp/corefcn/input.cc	Thu Jan 21 09:47:50 2016 -0800
@@ -852,7 +852,7 @@
   if (nargin == 1)
     prompt = args(0).xstring_value ("yes_or_no: PROMPT must be a string");
 
-  return octave_value (octave_yes_or_no (prompt));
+  return ovl (octave_yes_or_no (prompt));
 }
 
 octave_value
@@ -1250,7 +1250,7 @@
 
   input_event_hook_functions.insert (hook_fcn.id (), hook_fcn);
 
-  return octave_value (hook_fcn.id ());
+  return ovl (hook_fcn.id ());
 }
 
 DEFUN (remove_input_event_hook, args, ,
diff -r ba0a4b4f021d -r df7891224709 libinterp/corefcn/inv.cc
--- a/libinterp/corefcn/inv.cc	Thu Jan 21 11:24:36 2016 -0500
+++ b/libinterp/corefcn/inv.cc	Thu Jan 21 09:47:50 2016 -0800
@@ -71,7 +71,7 @@
   if (arg_is_empty < 0)
     return ovl ();
   else if (arg_is_empty > 0)
-    return octave_value (Matrix ());
+    return ovl (Matrix ());
 
   if (nr != nc)
     err_square_matrix_required ("inverse", "A");
diff -r ba0a4b4f021d -r df7891224709 libinterp/corefcn/kron.cc
--- a/libinterp/corefcn/kron.cc	Thu Jan 21 11:24:36 2016 -0500
+++ b/libinterp/corefcn/kron.cc	Thu Jan 21 09:47:50 2016 -0800
@@ -156,6 +156,7 @@
 {
   MTA am = octave_value_extract<MTA> (a);
   MTB bm = octave_value_extract<MTB> (b);
+
   return octave_value (kron (am, bm));
 }
 
diff -r ba0a4b4f021d -r df7891224709 libinterp/corefcn/load-path.cc
--- a/libinterp/corefcn/load-path.cc	Thu Jan 21 11:24:36 2016 -0500
+++ b/libinterp/corefcn/load-path.cc	Thu Jan 21 09:47:50 2016 -0800
@@ -2300,7 +2300,7 @@
 @seealso{path, addpath, rmpath, genpath, pathdef, savepath, pathsep}\n\
 @end deftypefn")
 {
-  return octave_value (load_path::get_command_line_path ());
+  return ovl (load_path::get_command_line_path ());
 }
 
 DEFUN (restoredefaultpath, , ,
@@ -2313,7 +2313,7 @@
 {
   load_path::initialize (true);
 
-  return octave_value (load_path::system_path ());
+  return ovl (load_path::system_path ());
 }
 
 // Return Octave's original default list of directories in which to
@@ -2327,7 +2327,7 @@
 Undocumented internal function.\n\
 @end deftypefn")
 {
-  return octave_value (load_path::system_path ());
+  return ovl (load_path::system_path ());
 }
 
 DEFUN (path, args, nargout,
@@ -2368,7 +2368,7 @@
     }
 
   if (nargout > 0)
-    return octave_value (load_path::path ());
+    return ovl (load_path::path ());
   else if (nargin == 0 && nargout == 0)
     {
       octave_stdout <<
diff -r ba0a4b4f021d -r df7891224709 libinterp/corefcn/pager.cc
--- a/libinterp/corefcn/pager.cc	Thu Jan 21 11:24:36 2016 -0500
+++ b/libinterp/corefcn/pager.cc	Thu Jan 21 09:47:50 2016 -0800
@@ -635,7 +635,7 @@
   size(0) = command_editor::terminal_rows ();
   size(1) = command_editor::terminal_cols ();
 
-  return octave_value (size);
+  return ovl (size);
 }
 
 DEFUN (page_output_immediately, args, nargout,
diff -r ba0a4b4f021d -r df7891224709 libinterp/corefcn/pinv.cc
--- a/libinterp/corefcn/pinv.cc	Thu Jan 21 11:24:36 2016 -0500
+++ b/libinterp/corefcn/pinv.cc	Thu Jan 21 09:47:50 2016 -0800
@@ -66,7 +66,7 @@
   if (arg_is_empty < 0)
     return ovl ();
   else if (arg_is_empty > 0)
-    return octave_value (Matrix ());
+    return ovl (Matrix ());
 
   octave_value retval;
 
diff -r ba0a4b4f021d -r df7891224709 libinterp/corefcn/rand.cc
--- a/libinterp/corefcn/rand.cc	Thu Jan 21 11:24:36 2016 -0500
+++ b/libinterp/corefcn/rand.cc	Thu Jan 21 09:47:50 2016 -0800
@@ -1173,7 +1173,7 @@
     idx.resize (dim_vector (1, m));
 
   // Now create an array object with a cached idx_vector.
-  return octave_value (new octave_matrix (r, idx_vector (idx)));
+  return ovl (new octave_matrix (r, idx_vector (idx)));
 }
 
 /*
diff -r ba0a4b4f021d -r df7891224709 libinterp/corefcn/strfns.cc
--- a/libinterp/corefcn/strfns.cc	Thu Jan 21 11:24:36 2016 -0500
+++ b/libinterp/corefcn/strfns.cc	Thu Jan 21 09:47:50 2016 -0800
@@ -259,6 +259,7 @@
         }
     }
 
+  // Cannot use ovl.  Relies on overloaded octave_value call.
   return octave_value (result, '\'');
 }
 
diff -r ba0a4b4f021d -r df7891224709 libinterp/corefcn/urlwrite.cc
--- a/libinterp/corefcn/urlwrite.cc	Thu Jan 21 11:24:36 2016 -0500
+++ b/libinterp/corefcn/urlwrite.cc	Thu Jan 21 09:47:50 2016 -0800
@@ -515,7 +515,7 @@
   curl_handle ch
     = ch_manager::make_curl_handle (host, user, passwd, octave_stdout);
 
-  return octave_value (ch.value ());
+  return ovl (ch.value ());
 }
 
 DEFUN (__ftp_pwd__, args, ,
diff -r ba0a4b4f021d -r df7891224709 libinterp/dldfcn/chol.cc
--- a/libinterp/dldfcn/chol.cc	Thu Jan 21 11:24:36 2016 -0500
+++ b/libinterp/dldfcn/chol.cc	Thu Jan 21 09:47:50 2016 -0800
@@ -182,7 +182,7 @@
   if (arg_is_empty < 0)
     return ovl ();
   if (arg_is_empty > 0)
-    return octave_value (Matrix ());
+    return ovl (Matrix ());
 
   if (arg.is_sparse_type ())
     {
diff -r ba0a4b4f021d -r df7891224709 libinterp/octave-value/ov-classdef.cc
--- a/libinterp/octave-value/ov-classdef.cc	Thu Jan 21 11:24:36 2016 -0500
+++ b/libinterp/octave-value/ov-classdef.cc	Thu Jan 21 09:47:50 2016 -0800
@@ -3730,7 +3730,7 @@
 Undocumented internal function.\n\
 @end deftypefn")
 {
-  return octave_value (new octave_classdef_superclass_ref (args));
+  return ovl (new octave_classdef_superclass_ref (args));
 }
 
 DEFUN (__meta_class_query__, args, ,
diff -r ba0a4b4f021d -r df7891224709 libinterp/octave-value/ov-struct.cc
--- a/libinterp/octave-value/ov-struct.cc	Thu Jan 21 11:24:36 2016 -0500
+++ b/libinterp/octave-value/ov-struct.cc	Thu Jan 21 09:47:50 2016 -0800
@@ -1671,8 +1671,6 @@
 @seealso{cell2struct, fieldnames, getfield, setfield, rmfield, isfield, orderfields, isstruct, structfun}\n\
 @end deftypefn")
 {
-  octave_value retval;
-
   int nargin = args.length ();
 
   // struct ([]) returns an empty struct.
@@ -1684,14 +1682,10 @@
   // compatibility with Matlab.
 
   if (nargin == 1 && args(0).is_map ())
-    return args(0);
+    return ovl (args(0));
 
   if (nargin == 1 && args(0).is_object ())
-    {
-      retval = args(0).map_value ();
-
-      return retval;
-    }
+    return ovl (args(0).map_value ());
 
   if ((nargin == 1 || nargin == 2)
       && args(0).is_empty () && args(0).is_real_matrix ())
@@ -1700,12 +1694,10 @@
         {
           Array<std::string> cstr = args(1).xcellstr_value ("struct: second argument should be a cell array of field names");
 
-          retval = octave_map (args(0).dims (), cstr);
+          return ovl (octave_map (args(0).dims (), cstr));
         }
       else
-        retval = octave_map (args(0).dims ());
-
-      return retval;
+        return ovl (octave_map (args(0).dims ()));
     }
 
   // Check for "field", VALUE pairs.
@@ -1737,9 +1729,9 @@
                 }
               else if (dims != argdims)
                 {
-                  error ("struct: dimensions of parameter %d do not match those of parameter %d",
+                  error ("struct: dimensions of parameter %d "
+                         "do not match those of parameter %d",
                          first_dimensioned_value, i+1);
-                  return retval;
                 }
             }
         }
@@ -1776,7 +1768,7 @@
         map.setfield (key, Cell (dims, args(i+1)));
     }
 
-  return octave_value (map);
+  return ovl (map);
 }
 
 /*