1 /* 2 * Copyright (c) 2025 Antmicro 3 * Originally created by William Swanson in 2012, donated to the public domain. 4 */ 5 6 #ifndef MAP_H_INCLUDED 7 #define MAP_H_INCLUDED 8 9 #define EVAL0(...) __VA_ARGS__ 10 #define EVAL1(...) EVAL0(EVAL0(EVAL0(__VA_ARGS__))) 11 #define EVAL2(...) EVAL1(EVAL1(EVAL1(__VA_ARGS__))) 12 #define EVAL3(...) EVAL2(EVAL2(EVAL2(__VA_ARGS__))) 13 #define EVAL4(...) EVAL3(EVAL3(EVAL3(__VA_ARGS__))) 14 #define EVAL(...) EVAL4(EVAL4(EVAL4(__VA_ARGS__))) 15 16 #define MAP_END(...) 17 #define MAP_OUT 18 #define MAP_COMMA , 19 20 #define MAP_GET_END2() 0, MAP_END 21 #define MAP_GET_END1(...) MAP_GET_END2 22 #define MAP_GET_END(...) MAP_GET_END1 23 #define MAP_NEXT0(test, next, ...) next MAP_OUT 24 #define MAP_NEXT1(test, next) MAP_NEXT0(test, next, 0) 25 #define MAP_NEXT(test, next) MAP_NEXT1(MAP_GET_END test, next) 26 27 #define MAP0(f, x, peek, ...) f(x) MAP_NEXT(peek, MAP1)(f, peek, __VA_ARGS__) 28 #define MAP1(f, x, peek, ...) f(x) MAP_NEXT(peek, MAP0)(f, peek, __VA_ARGS__) 29 30 #define MAP_LIST_NEXT1(test, next) MAP_NEXT0(test, MAP_COMMA next, 0) 31 #define MAP_LIST_NEXT(test, next) MAP_LIST_NEXT1(MAP_GET_END test, next) 32 33 #define MAP_LIST0(f, x, peek, ...) f(x) MAP_LIST_NEXT(peek, MAP_LIST1)(f, peek, __VA_ARGS__) 34 #define MAP_LIST1(f, x, peek, ...) f(x) MAP_LIST_NEXT(peek, MAP_LIST0)(f, peek, __VA_ARGS__) 35 36 /** 37 * Applies the function macro `f` to each of the remaining parameters. 38 */ 39 #define MAP(f, ...) EVAL(MAP1(f, __VA_ARGS__, ()()(), ()()(), ()()(), 0)) 40 41 /** 42 * Applies the function macro `f` to each of the remaining parameters and 43 * inserts commas between the results. 44 */ 45 #define MAP_LIST(f, ...) EVAL(MAP_LIST1(f, __VA_ARGS__, ()()(), ()()(), ()()(), 0)) 46 47 #endif 48
