#define AT __FILE__ ":" TOSTRING(__LINE__)
#define AT __FILE__ “:” TOSTRING(__LINE__)
有时候为了增加调试程序信息具体,加上:
#define STRINGIFY(x) #x
#define TOSTRING(x) STRINGIFY(x)
#define AT __FILE__ ":" TOSTRING(__LINE__)
example.c:
#include <stdio.h>
#define STRINGIFY(x) #x
#define TOSTRING(x) STRINGIFY(x)
#define AT __FILE__ ":" TOSTRING(__LINE__)
void error(const char *location, const char *msg)
{
printf("Error at %s: %s\n", location, msg);
}
int main(int , char**)
{
error(AT, "fake error");
return 0;
}
运行结果:
$./example
Error at example.c fake error
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