(With thanks to https://groups.google.com/d/topic/comp.std.c/d-6Mj5Lko_s/discussion
and http://stackoverflow.com/questions/1872220/is-it-possible-to-iterate-over-arguments-in-variadic-macros)
*/
-#define wxCALL_FOR_EACH_NARG(...) wxCALL_FOR_EACH_NARG_(__VA_ARGS__, wxCALL_FOR_EACH_RSEQ_N())
-#define wxCALL_FOR_EACH_NARG_(...) wxCALL_FOR_EACH_ARG_N(__VA_ARGS__)
+#define wxCALL_FOR_EACH_NARG(...) wxCALL_FOR_EACH_NARG_((__VA_ARGS__, wxCALL_FOR_EACH_RSEQ_N()))
+#define wxCALL_FOR_EACH_NARG_(args) wxCALL_FOR_EACH_ARG_N args
#define wxCALL_FOR_EACH_ARG_N(_1, _2, _3, _4, _5, _6, _7, _8, N, ...) N
#define wxCALL_FOR_EACH_RSEQ_N() 8, 7, 6, 5, 4, 3, 2, 1, 0
#define wxCALL_FOR_EACH_7(what, x, ...) what(7, x) wxCALL_FOR_EACH_6(what, __VA_ARGS__)
#define wxCALL_FOR_EACH_8(what, x, ...) what(8, x) wxCALL_FOR_EACH_7(what, __VA_ARGS__)
-#define wxCALL_FOR_EACH_(N, what, ...) \
- wxCONCAT(wxCALL_FOR_EACH_, N)(what, __VA_ARGS__)
+#define wxCALL_FOR_EACH_(N, args) \
+ wxCONCAT(wxCALL_FOR_EACH_, N) args
#define wxCALL_FOR_EACH(what, ...) \
- wxCALL_FOR_EACH_(wxCALL_FOR_EACH_NARG(__VA_ARGS__), what, __VA_ARGS__)
+ wxCALL_FOR_EACH_(wxCALL_FOR_EACH_NARG(__VA_ARGS__), (what, __VA_ARGS__))
#else
#define wxCALL_FOR_EACH Error_wx_CALL_FOR_EACH_requires_variadic_macros_support