# HG changeset patch
# User Jordi Gutiérrez Hermoso <jordigh@gmail.com>
# Date 1311810433 18000
# Node ID 503865c2e542ae1b37b2be715d4d36346436b7a8
# Parent  8edece28cf4da09ac8eb89db6a22f5b1de8b4f2a
strfns.cc: Return empty string in strvcat if called sans arguments (bug #33533)

diff --git a/src/strfns.cc b/src/strfns.cc
--- a/src/strfns.cc
+++ b/src/strfns.cc
@@ -170,6 +170,7 @@
 @deftypefnx {Built-in Function} {} strvcat (@var{x}, @dots{})\n\
 @deftypefnx {Built-in Function} {} strvcat (@var{s1}, @var{s2}, @dots{})\n\
 @deftypefnx {Built-in Function} {} strvcat (@var{cell_array})\n\
+@deftypefnx {Built-in Function} {} strvcat ()\n\
 Create a character array from one or more numeric matrices, character\n\
 matrices, or cell arrays.  Arguments are concatenated vertically.\n\
 The returned values are padded with blanks as needed to make each row\n\
@@ -196,6 +197,9 @@
          \"half   \"]\n\
 @end group\n\
 @end example\n\
+\n\
+For compatibility with @sc{Matlab}, calling @code{strvcat} without arguments\n\
+returns the empty string.\n\
 @seealso{char, strcat, cstrcat}\n\
 @end deftypefn")
 {
@@ -273,7 +277,7 @@
       retval = octave_value (result, '\'');
     }
   else
-    print_usage ();
+    retval = octave_value ("");
 
   return retval;
 }