NARG
Description
Count the number of arguments in a variadic macro pack, 0 through 16. Requires __VA_OPT__ (C23 / current GCC, clang, MSVC).
Usage: NARG(a, b, c) -> 3, NARG() -> 0.
Usage example (Cross-references)
Usage examples (Cross-references)
- In
Types.h:915:
/// concatenation in `OVERLOAD__`.
///
#define OVERLOAD(name, ...) OVERLOAD_(name, NARG(__VA_ARGS__), __VA_ARGS__)
#define OVERLOAD_(name, N, ...) OVERLOAD__(name, N, __VA_ARGS__)
#define OVERLOAD__(name, N, ...) CONCAT(name##_, N)(__VA_ARGS__)
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