fix wxWeakRef<> for Borland C++ (slightly modified patch 1902415)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@52155 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/defs.h

@@ -472,6 +472,18 @@ typedef short int WXTYPE;
     #endif
 #endif // __VISUALC__
 
+
+#ifndef HAVE_TEMPLATE_OVERLOAD_RESOLUTION
+    // assume the compiler can use type or const expressions as template
+    // arguments if it supports partial specialization -- except if it's a
+    // Borland one which can't
+    #ifdef HAVE_PARTIAL_SPECIALIZATION && !defined(__BORLANDC__)
+        #define HAVE_TEMPLATE_OVERLOAD_RESOLUTION
+    #endif
+#endif // __BORLANDC__
+
+#endif // !defined(HAVE_TEMPLATE_OVERLOAD_RESOLUTION)
+
 /*  ---------------------------------------------------------------------------- */
 /*  portable calling conventions macros */
 /*  ---------------------------------------------------------------------------- */

include/wx/weakref.h

@@ -74,8 +74,13 @@ protected:
     T *m_pobj;
 };
 
-#ifdef HAVE_PARTIAL_SPECIALIZATION
 
+#if !defined(HAVE_PARTIAL_SPECIALIZATION) || !defined(HAVE_TEMPLATE_OVERLOAD_RESOLUTION)
+    #define USE_STATIC_WEAKREF
+#endif 
+
+
+#ifndef USE_STATIC_WEAKREF
 template<class T,bool use_static>
 struct wxWeakRefImpl;
 
@@ -169,17 +174,18 @@ protected:
     wxTrackable *m_ptbase;
 };
 
-#endif // HAVE_PARTIAL_SPECIALIZATION
+#endif // #ifndef USE_STATIC_WEAKREF
+
 
 
 // A weak reference to an object of type T, where T has type wxTrackable
 // (usually statically but if not dynamic_cast<> is tried).
 template <class T>
 class wxWeakRef : public
-#ifdef HAVE_PARTIAL_SPECIALIZATION
-                  wxWeakRefImpl<T, wxIsStaticTrackable<T>::value>
-#else
+#ifdef USE_STATIC_WEAKREF
                   wxWeakRefStatic<T>
+#else
+                  wxWeakRefImpl<T, wxIsStaticTrackable<T>::value>
 #endif
 {
 public: