add support for named warning codes

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk/SWIG@8249 626c5289-ae23-0410-ae9c-e8d60b6d4f22

Source/Preprocessor/cpp.c

@@ -1581,7 +1581,11 @@ Preprocessor_parse(String *s)
 	  while (*c && (isspace((int)*c))) c++;
 	  if (*c) {
 	    if (strncmp(c,"nowarn=",7) == 0) {
-	      Swig_warnfilter(c+7,1);
+	      String *val = NewString(c+7);
+	      String *nowarn = Preprocessor_replace(val);
+	      Swig_warnfilter(nowarn,1);
+	      Delete(nowarn);
+	      Delete(val);
 	    }
 	    else if (strncmp(c,"cpperraswarn=",7) == 0) {
 	      error_as_warning = atoi(c+13);

Source/Swig/error.c

@@ -173,10 +173,20 @@ Swig_error_silent(int s) {
 void
 Swig_warnfilter(const String_or_char *wlist, int add) {
   char *c;
+  char *cw;
   String *s;
 
   if (!filter) filter = NewStringEmpty();
-  s = NewString(wlist);
+  
+  s = NewString("");
+  Clear(s);
+  cw = Char(wlist);
+  while (*cw != '\0') {
+    if (*cw != ' ') {
+      Putc(*cw, s);
+    }
+    ++cw;
+  }
   c = Char(s);
   c = strtok(c,", ");
   while (c) {