Variadic macros with zero arguments

Question

I am working on a call macro,

#define CALL(f,...) FN(f)->call((ref(new LinkedList()), __VA_ARGS__))

which when called,

C         


        

Answer 1

If you are using GCC, it has an extension to swallow up the comma preceding the __VA_ARGS__. See: http://gcc.gnu.org/onlinedocs/cpp/Variadic-Macros.html.