Import r67258 of the wxWidgets trunk, which I expect will before

long become wxWidgets 2.9.2, which in turn is expected to be the
last 2.9 release before the 3.0 stable release.

Since the full wxWidgets distribution is rather large, I have
imported only the parts that we use, on a subdirectory basis:

art
include/wx/*.*
include/wx/aui
include/wx/cocoa
include/wx/generic
include/wx/gtk
include/wx/meta
include/wx/msw
include/wx/osx
include/wx/persist
include/wx/private
include/wx/protocol
include/wx/unix
src/aui
src/common
src/generic
src/gtk
src/msw
src/osx
src/unix


git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@7380 8ced0084-cf51-0410-be5f-012b33b47a6e

Externals/wxWidgets3/include/wx/meta/convertible.h

@@ -0,0 +1,39 @@
+/////////////////////////////////////////////////////////////////////////////
+// Name:        wx/meta/convertible.h
+// Purpose:     Test if types are convertible
+// Author:      Arne Steinarson
+// Created:     2008-01-10
+// RCS-ID:      $Id: convertible.h 61724 2009-08-21 10:41:26Z VZ $
+// Copyright:   (c) 2008 Arne Steinarson
+// Licence:     wxWindows licence
+/////////////////////////////////////////////////////////////////////////////
+
+#ifndef _WX_META_CONVERTIBLE_H_
+#define _WX_META_CONVERTIBLE_H_
+
+//
+// Introduce an extra class to make this header compilable with g++3.2
+//
+template <class D, class B>
+struct wxConvertibleTo_SizeHelper
+{
+    static char Match(B* pb);
+    static int  Match(...);
+};
+
+// Helper to decide if an object of type D is convertible to type B (the test
+// succeeds in particular when D derives from B)
+template <class D, class B>
+struct wxConvertibleTo
+{
+    enum
+    {
+        value =
+            sizeof(wxConvertibleTo_SizeHelper<D,B>::Match(static_cast<D*>(NULL)))
+            ==
+            sizeof(char)
+    };
+};
+
+#endif // _WX_META_CONVERTIBLE_H_
+