moving the 'unnamed' macros outside swig.swg, for better mantainance

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@5809 626c5289-ae23-0410-ae9c-e8d60b6d4f22

SWIG/Examples/test-suite/python/cpp_enum_runme.py

@@ -0,0 +1,14 @@
+import cpp_enum
+
+f = cpp_enum.Foo()
+
+f.hola = f.Hi
+if f.hola != f.Hi:
+  print f.hola
+  raise RuntimeError
+
+f.hola = f.Hello
+
+if f.hola != f.Hello:
+  print f.hola
+  raise RuntimeError

SWIG/Lib/swig.swg

@@ -402,37 +402,4 @@ static int NAME(TYPE x) {
 %}
 %enddef
 
-
-/* 
-   Auxiliary 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; };
-
-   Activate the following for compilers that do not support unnamed
-   template parameters (under your own risk).
-
-   #define SWIG_UNNAMED_USE_MEMCPY
-*/
-%insert("runtime") %{
-#ifdef __cplusplus
-/* here, the C++ compilers that do not accept unnamed template parameters */
-#if defined(_SGI_COMPILER_VERSION)
-#ifdef SWIG_UNNAMED_USE_MEMCPY
-/* dangerous assigment, but for enums could work */
-#define swig_assign_unnamed(eval, val) memcpy(&(eval),&(val), sizeof(eval))
-#else
-#define swig_assign_unnamed(eval, val) printf("unnamed member assigment not sopperted")
-#endif
-#else
-template <class T, class V>
-inline
-void swig_assign_unnamed(T& eval, const V& val)
-{
-  eval = static_cast<T>(val);
-}
-#endif
-#else
-#define swig_assign_unnamed(eval, val) eval = val
-#endif
-%}
+%include unnamed.swg

SWIG/Lib/unnamed.swg

@@ -0,0 +1,42 @@
+/* 
+   Auxiliary 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; };
+
+   These are very specific macros, that could keep growing as more
+   compilers require especial support, or could vanish latter if the
+   enum mapping changes drastically. Therefore, better we put them in
+   this separate file, so swig.swg doesn't change every time we update
+   something here.
+
+*/
+
+%insert("runtime") %{
+#ifdef __cplusplus
+// here, the C++ compilers that do not accept unnamed template parameters 
+#if defined(_SGI_COMPILER_VERSION)
+//
+// Activate the following macro for compilers that do not support
+// unnamed template parameters, but where memcpy works.
+//
+//#define SWIG_UNNAMED_USE_MEMCPY
+//
+#ifdef SWIG_UNNAMED_USE_MEMCPY
+// dangerous assigment, but for enums it should work.
+#define swig_assign_unnamed(eval, val) memcpy(&(eval),&(val), sizeof(eval))
+#else
+#define swig_assign_unnamed(eval, val) printf("unnamed member assigment not supported\n")
+#endif
+#else
+template <class T, class V>
+inline
+void swig_assign_unnamed(T& eval, const V& val)
+{
+  eval = static_cast<T>(val);
+}
+#endif
+#else
+#define swig_assign_unnamed(eval, val) eval = val
+#endif
+%}