Fix type-punning issues with C++.

* include/freetype/internal/ftmemory.h (FT_ASSIGNP) [__cplusplus]:
Emulate a `typeof' operator with an inline template which uses
`static_cast'.

ChangeLog

@@ -1,9 +1,17 @@
+2010-07-12  malc  <av1474@comtv.ru>
+
+	Fix type-punning issues with C++.
+
+	* include/freetype/internal/ftmemory.h (FT_ASSIGNP) [__cplusplus]:
+	Emulate a `typeof' operator with an inline template which uses
+	`static_cast'.
+
 2010-07-11  Werner Lemberg  <wl@gnu.org>
 
 	Fix C++ compilation issue.
 
 	* src/tools/apinames.c (names_dump) <OUTPUT_WATCOM_LBC>: Fix
-	typo of `dot' variable.
+	type of `dot' variable.
 
 2010-07-10  suzuki toshiya  <mpsuzuki@hiroshima-u.ac.jp>
 

include/freetype/internal/ftmemory.h

@@ -4,7 +4,7 @@
 /*                                                                         */
 /*    The FreeType memory management macros (specification).               */
 /*                                                                         */
-/*  Copyright 1996-2001, 2002, 2004, 2005, 2006, 2007 by                   */
+/*  Copyright 1996-2001, 2002, 2004, 2005, 2006, 2007, 2010 by             */
 /*  David Turner, Robert Wilhelm, and Werner Lemberg                       */
 /*                                                                         */
 /*  This file is part of the FreeType project, and may only be used,       */
@@ -58,15 +58,27 @@ FT_BEGIN_HEADER
 
 
   /*
-   *  C++ refuses to handle statements like p = (void*)anything; where `p'
-   *  is a typed pointer.  Since we don't have a `typeof' operator in
-   *  standard C++, we have to use ugly casts.
+   *  C++ refuses to handle statements like p = (void*)anything, with `p' a
+   *  typed pointer.  Since we don't have a `typeof' operator in standard
+   *  C++, we have to use a template to emulate it.
    */
 
 #ifdef __cplusplus
-#define FT_ASSIGNP( p, val )  *((void**)&(p)) = (val)
+
+  extern "C++"
+  template <typename T> inline T*
+  cplusplus_typeof(        T*,
+                    void  *v )
+  {
+    return static_cast <T*> ( v );
+  }
+
+#define FT_ASSIGNP( p, val )  (p) = cplusplus_typeof( (p), (val) )
+
 #else
+
 #define FT_ASSIGNP( p, val )  (p) = (val)
+
 #endif