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lib: Add MAP_LIST macro

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Signed-off-by: Donald Lee <dlqs@gmx.com>
This commit is contained in:
Donald Lee 2021-06-11 17:37:37 +08:00
parent cd551a0fd5
commit 249cd5daa7
1 changed files with 23 additions and 0 deletions
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23
lib/compiler.h
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@ -173,6 +173,29 @@ extern "C" {
#define MACRO_REPEAT(NAME, ...) \
MACRO_VARIANT(_MACRO_REPEAT, ##__VA_ARGS__)(NAME, ##__VA_ARGS__)
/* per-arglist repeat macro, use like this:
* #define SEP_SEMICOLON ;
* #define foo(...) MAP_LISTS(F, SEP_SEMICOLON, ##__VA_ARGS__)
* where F is a n-ary function where n is the number of args in each arglist.
* e.g.: MAP_LISTS(f, SEP_SEMICOLON, (a, b), (c, d, e))
* expands to: f(a, b); f(c, d, e)
*/
#define ESC(...) __VA_ARGS__
#define MAP_LISTS(M, ...) \
_CONCAT(_MAP_LISTS_, PP_NARG(__VA_ARGS__))(M, ##__VA_ARGS__)
#define _MAP_LISTS_0(M)
#define _MAP_LISTS_1(M, _1) ESC(M _1)
#define _MAP_LISTS_2(M, _1, _2) ESC(M _1; M _2)
#define _MAP_LISTS_3(M, _1, _2, _3) ESC(M _1; M _2; M _3)
#define _MAP_LISTS_4(M, _1, _2, _3, _4) ESC(M _1; M _2; M _3; M _4)
#define _MAP_LISTS_5(M, _1, _2, _3, _4, _5) ESC(M _1; M _2; M _3; M _4; M _5)
#define _MAP_LISTS_6(M, _1, _2, _3, _4, _5, _6) \
ESC(M _1; M _2; M _3; M _4; M _5; M _6)
#define _MAP_LISTS_7(M, _1, _2, _3, _4, _5, _6, _7) \
ESC(M _1; M _2; M _3; M _4; M _5; M _6; M _7)
#define _MAP_LISTS_8(M, _1, _2, _3, _4, _5, _6, _7, _8) \
ESC(M _1; M _2; M _3; M _4; M _5; M _6; M _7; M _8)
/*
* for warnings on macros, put in the macro content like this:
* #define MACRO BLA CPP_WARN("MACRO has been deprecated")