Remove MSVC6 support.

Don't support this compiler any more, this allows to get rid of tons of
MSVC6-specific workarounds, in particular we can now use Bind() and natural
template functions calls in the library code.

Also remove MSVC6 project and solution files and don't generate them when
bakefile_gen is ran any more (removing the remaining occurrences of msvc6prj
from the bakefiles results in weird bake-time errors, so it's simpler to just
leave them there).

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76532 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/meta/pod.h

@@ -18,22 +18,11 @@
 //       <tr1/type_traits>, while GCC 4.3 and later have it in <type_traits>.
 //
 
-// This macro declares something called "value" inside a class declaration.
-//
-// It has to be used because VC6 doesn't handle initialization of the static
-// variables in the class declaration itself while BCC5.82 doesn't understand
-// enums (it compiles the template fine but can't use it later)
-#if defined(__VISUALC__) && !wxCHECK_VISUALC_VERSION(7)
-    #define wxDEFINE_TEMPLATE_BOOL_VALUE(val) enum { value = val }
-#else
-    #define wxDEFINE_TEMPLATE_BOOL_VALUE(val) static const bool value = val
-#endif
-
 // Helper to decide if an object of type T is POD (Plain Old Data)
 template<typename T>
 struct wxIsPod
 {
-    wxDEFINE_TEMPLATE_BOOL_VALUE(false);
+    static const bool value = false;
 };
 
 // Macro to add wxIsPod<T> specialization for given type that marks it
@@ -41,7 +30,7 @@ struct wxIsPod
 #define WX_DECLARE_TYPE_POD(type)                           \
     template<> struct wxIsPod<type>                         \
     {                                                       \
-        wxDEFINE_TEMPLATE_BOOL_VALUE(true);                 \
+        static const bool value = true;                     \
     };
 
 WX_DECLARE_TYPE_POD(bool)
@@ -64,11 +53,6 @@ WX_DECLARE_TYPE_POD(wxLongLong_t)
 WX_DECLARE_TYPE_POD(wxULongLong_t)
 #endif
 
-// Visual C++ 6.0 can't compile partial template specializations and as this is
-// only an optimization, we can live with pointers not being recognized as
-// POD types under VC6
-#if !defined(__VISUALC__) || wxCHECK_VISUALC_VERSION(7)
-
 // pointers are Plain Old Data:
 template<typename T>
 struct wxIsPod<T*>
@@ -82,6 +66,4 @@ struct wxIsPod<const T*>
     static const bool value = true;
 };
 
-#endif // !VC++ < 7
-
 #endif // _WX_META_POD_H_