From cd780b84a66d1490ed89a2952c269a2bba998624 Mon Sep 17 00:00:00 2001
From: Dave Beazley <dave-swig@dabeaz.com>
Date: Fri, 11 Apr 2003 16:33:17 +0000
Subject: [PATCH] patch to macros with no arguments (again).

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@4677 626c5289-ae23-0410-ae9c-e8d60b6d4f22
---
 SWIG/Source/Preprocessor/cpp.c | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/SWIG/Source/Preprocessor/cpp.c b/SWIG/Source/Preprocessor/cpp.c
index 27a3e10f5..12942c8a8 100644
--- a/SWIG/Source/Preprocessor/cpp.c
+++ b/SWIG/Source/Preprocessor/cpp.c
@@ -593,6 +593,11 @@ expand_macro(String_or_char *name, List *args)
     return 0;
   }
 
+  /* If the macro expects arguments, but none were supplied, we leave it in place */
+  if (!args && (margs)) {
+    return NewString(name);
+  }
+
   /* Copy the macro value */
   ns = Copy(mvalue);
   copy_location(mvalue,ns);
@@ -600,8 +605,6 @@ expand_macro(String_or_char *name, List *args)
   /* Tag the macro as being expanded.   This is to avoid recursion in
      macro expansion */
 
-
-
   temp = NewString("");
   tempa = NewString("");
   if (args && margs) {
@@ -847,15 +850,13 @@ Preprocessor_replace(DOH *s)
 	  if (Getattr(m,"args")) {
 	    /* Yep.  We need to go find the arguments and do a substitution */
 	    args = find_args(s);
+	    if (!Len(args)) {
+	      Delete(args);
+	      args = 0;
+	    }
 	  } else {
 	    args = 0;
 	  }
-	  if (args) {
-	    /*	    List *nargs = evaluate_args(args);
-		    Delete(args);
-		    args = nargs; */
-	  }
-
 	  e = expand_macro(id,args);
 	  if (e) {
 	    Printf(ns,"%s",e);