#define FB_THIRD(a, b, ...) __VA_ARGS__
#endif
+// MSVC's preprocessor is a pain, so we have to
+// forcefully expand the VA args in some places.
+#define FB_VA_GLUE(a, b) a b
+
/**
* Helper macro that extracts the first argument out of a list of any
* number of arguments.
* number of arguments. If only one argument is given, it returns
* that.
*/
+#ifdef _MSC_VER
+// GCC refuses to expand this correctly if this macro itself was
+// called with FB_VA_GLUE :(
+#define FB_ARG_2_OR_1(...) \
+ FB_VA_GLUE(FB_ARG_2_OR_1_IMPL, (__VA_ARGS__, __VA_ARGS__))
+#else
#define FB_ARG_2_OR_1(...) FB_ARG_2_OR_1_IMPL(__VA_ARGS__, __VA_ARGS__)
+#endif
// Support macro for the above
#define FB_ARG_2_OR_1_IMPL(a, b, ...) b