【C/C++】巨集引數多對一和巨集部分替換
阿新 • • 發佈:2022-03-29
巨集引數多對一:使用分號分隔多引數
巨集部分替換:替換需要轉換的再與後續巨集接續
#include <stdio.h> #define _MESS_FAILED() printf("%s %d: ASSERT FAILED\r\n", __func__, __LINE__) #define TU_BREAKPOINT() \ do { \ printf("TU_BREAKPOINT()\n"); \ } while (0) #define TU_VERIFY_DEFINE(_cond, _handler, _ret) \ do { \ if (!(_cond)) { \ _handler; \ return _ret; \ } \ } while(0) #define GET_3RD_ARG(arg1, arg2, arg3, ...) arg3 // 巨集引數多對一 ';' #define ASSERT_1ARGS(_cond) TU_VERIFY_DEFINE(_cond, _MESS_FAILED(); TU_BREAKPOINT(), false) #define ASSERT_2ARGS(_cond, _ret) TU_VERIFY_DEFINE(_cond, _MESS_FAILED(); TU_BREAKPOINT(), _ret) // 巨集部分替換 #define TU_ASSERT(...) GET_3RD_ARG(__VA_ARGS__, ASSERT_2ARGS, ASSERT_1ARGS, UNUSED)(__VA_ARGS__) typedef enum{false, true} bool; bool assert_function_true(void) { TU_ASSERT(true); } bool assert_function_false(void) { TU_ASSERT(false); } int main() { /* Write C code in this online editor and run it. */ printf("Hello, World! \n"); TU_ASSERT(1); printf("-------------------------\n"); printf("%d\n", assert_function_true()); printf("-------------------------\n"); printf("%d\n", assert_function_false()); printf("-------------------------\n"); TU_ASSERT(0); return 0; }
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