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

As for the updated question, by the use of auxiliary macro VA_ARGS like the following, the arguments will be expanded as expected.

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