#define MY_EXPANSION(...) __VA_ARGS__
#define MY_MACRO_FNC(one, two, three) ONE = one, TWO = two, THREE = three
#define MY_VARIADIC_MACRO(...) MY_EXAPNASION(MY_MACRO_FNC(__VA_ARGS__))

MY_MACRO_FNC(1, 2, 3)
MY_VARIADIC_MACRO_FNC(1, 2, 3)