Changes to m4/src/Attic/builtin.c,v [branch-1_4]

[Eric Blake]

CVSROOT:        /sources/m4
Module name:    m4
Branch:         branch-1_4
Changes by:     Eric Blake <ericb>      06/10/29 15:22:42

Index: src/builtin.c
===================================================================
RCS file: /sources/m4/m4/src/Attic/builtin.c,v
retrieving revision 1.1.1.1.2.46
retrieving revision 1.1.1.1.2.47
diff -u -b -r1.1.1.1.2.46 -r1.1.1.1.2.47
--- src/builtin.c       26 Oct 2006 21:11:56 -0000      1.1.1.1.2.46
+++ src/builtin.c       29 Oct 2006 15:22:42 -0000      1.1.1.1.2.47
@@ -1146,6 +1146,7 @@
   if (bad_argc (argv[0], argc, 1, 3))
     return;
 
+  /* Explicit NULL distinguishes between empty and missing argument.  */
   set_quotes ((argc >= 2) ? TOKEN_DATA_TEXT (argv[1]) : NULL,
             (argc >= 3) ? TOKEN_DATA_TEXT (argv[2]) : NULL);
 }
@@ -1161,10 +1162,8 @@
   if (bad_argc (argv[0], argc, 1, 3))
     return;
 
-  if (argc == 1)
-    set_comment ("", "");      /* disable comments */
-  else
-    set_comment (TOKEN_DATA_TEXT (argv[1]),
+  /* Explicit NULL distinguishes between empty and missing argument.  */
+  set_comment ((argc >= 2) ? TOKEN_DATA_TEXT (argv[1]) : NULL,
                (argc >= 3) ? TOKEN_DATA_TEXT (argv[2]) : NULL);
 }