# HG changeset patch
# User Rik <rik@octave.org>
# Date 1668801799 28800
# Node ID caf42f5c3f4e848c3f2c55042883e86a87d961cc
# Parent  d6fd7833f861925111fa16cc378b23f901d5a420
isstring.m: Future proof function so that it will work when string class is implemented (bug #50855)

* isstring.m: Use isa() to test for class 'string' rather than always returning
false.  Remove unnecessary BIST test.

diff -r d6fd7833f861 -r caf42f5c3f4e scripts/strings/isstring.m
--- a/scripts/strings/isstring.m	Fri Nov 18 16:59:14 2022 +0100
+++ b/scripts/strings/isstring.m	Fri Nov 18 12:03:19 2022 -0800
@@ -46,7 +46,7 @@
     print_usage ();
   endif
 
-  tf = false;
+  tf = isa (s, 'string');
 
 endfunction
 
@@ -60,4 +60,3 @@
 %!assert (isstring ({"b"}), false)
 
 %!error <Invalid call> isstring ()
-%!error isstring ("a", "b")