C preprocessor IV: VA Args

And things just got even more awesome in our preprocessor series: if just passing a known number of parameters is not cool enough for you you can use a variable number of arguments on a macro definition too. This is very useful to implement printf style debug macros which get replaced by no tokens on a release build. Or to make debugging a bit more complicated, your choice.

#define DEBUG(fmt, ...) printf(fmt, __VA_ARGS__);

Combining this with stringify will provide you hours of fun. Combining this with token pasting… well, that’s just evil.


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