C Macros: How to map another macro to variadic arguments?

Question

I\'d like to know how to apply a unary function (or another macro) to variadic arguments of a macro, like

int f(int a);

#define apply(args...) 

        

Answer 1

IMO impossible unless you use horrible tricks and hacks like this

https://groups.google.com/forum/#!topic/comp.std.c/d-6Mj5Lko_s

And as I see it calls the same function so the type of the parameter is known - why you do not use stdarg instead.