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If you are on C++11 (or newer), it should be possible to use variadic templates to write a simple (compile-time) function to count the number of arguments: template<typename... Ts> constexp...
#1: Initial revision
by
mr Tsjolder
·
2025-06-09T11:00:11Z (about 7 hours ago)
If you are on C++11 (or newer), it should be possible to use [variadic templates](https://en.cppreference.com/w/cpp/language/parameter_pack.html) to write a simple (compile-time) function to count the number of arguments:
```cpp
template<typename... Ts>
constexpr int countArgs(const Ts&... args) {
return sizeof...(args);
}
```
With this function, we can go ahead and write the desired macro as follows:
```cpp
#define F(...) f(countArgs(__VA_ARGS__), __VA_ARGS__)
```
This should work no matter what the types of the variadic arguments are.