gistfile1.txt

#include <stdio.h>

// With love from http://stackoverflow.com/a/13459454/447288
#define EVAL0(...) __VA_ARGS__
#define EVAL1(...) EVAL0 (EVAL0 (EVAL0 (__VA_ARGS__)))
#define EVAL2(...) EVAL1 (EVAL1 (EVAL1 (__VA_ARGS__)))
#define EVAL3(...) EVAL2 (EVAL2 (EVAL2 (__VA_ARGS__)))
#define EVAL4(...) EVAL3 (EVAL3 (EVAL3 (__VA_ARGS__)))
#define EVAL(...)  EVAL4 (EVAL4 (EVAL4 (__VA_ARGS__)))

#define MAP_END(...)
#define MAP_OUT
#define MAP_GET_END() 0, MAP_END
#define MAP_NEXT0(item, next, ...) next MAP_OUT
#define MAP_NEXT1(item, next) MAP_NEXT0 (item, next, 0)
#define MAP_NEXT(item, next)  MAP_NEXT1 (MAP_GET_END item, next)

#define MAP0(f, x, peek, ...) f(x) MAP_NEXT (peek, MAP1) (f, peek, __VA_ARGS__)
#define MAP1(f, x, peek, ...) f(x) MAP_NEXT (peek, MAP0) (f, peek, __VA_ARGS__)

#define MAP(f, ...) EVAL (MAP1 (f, __VA_ARGS__, (), 0))

#define STR(x) #x

#define ARG(x) " " STR(x) ":%x"
#define TRACE(...) printf("%s:%d" MAP(ARG, __VA_ARGS__) "\n", __func__, __LINE__, __VA_ARGS__);


int main(int argc, char** argv) {
    int x = 0;
    int y = 1;
    int z = 0;

    // printf(__func__ ":%d x:%x y:%x z:%x", __LINE__, x, y, z);
    TRACE(x, y, z);
}