added support for unnamed C++ enum members

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk/SWIG@5805 626c5289-ae23-0410-ae9c-e8d60b6d4f22

Examples/test-suite/cpp_enum.i

@@ -24,4 +24,11 @@ struct StructWithEnums {
     enum SOME_ENUM& enum_test8() { return some_enum; };
 };
 
+
+ struct Foo
+ {
+   enum {Hi, Hello } hola;
+   
+ };
+
 %}

Lib/swig.swg

@@ -403,3 +403,19 @@ static int NAME(TYPE x) {
 %enddef
 
 
+/* Auxiliar methods for assigning unnamed type C++ variables, where
+   swig doesn't know the casting type, but C++ can derived it:
+
+     struct Foo { enum {Hi, Hello } hola; };
+*/
+%insert("runtime") %{
+#ifdef __cplusplus
+template <class T, class V>
+void swig_assign_unnamed(T& eval, const V& val)
+{
+  eval = static_cast<T>(val);
+}
+#else
+#define swig_assign_unnamed(eval, val) eval = val
+#endif
+%}

Source/Swig/cwrap.c

@@ -557,7 +557,13 @@ Swig_cmemberset_call(String_or_char *name, SwigType *type, String_or_char *self)
   else self = NewString(self);
   Replaceall(self,"this",Swig_cparm_name(0,0));
   if (SwigType_type(type) != T_ARRAY) {
-    Printf(func,"if (%s) %s%s = %s",Swig_cparm_name(0,0), self,name, Swig_wrapped_var_deref(type, Swig_cparm_name(0,1)));
+    if (!Strstr(type,"$unnamed")) {
+      Printf(func,"if (%s) %s%s = %s",Swig_cparm_name(0,0), self,name,
+	     Swig_wrapped_var_deref(type, Swig_cparm_name(0,1)));
+    } else {
+      Printf(func,"if (%s) swig_assign_unnamed(%s%s, %s)",Swig_cparm_name(0,0), self,name,
+	     Swig_cparm_name(0,1));
+    }
   }
   Delete(self);
   return(func);