How do I return the number of arguments of a function?

Question

For example if I have

int MyFunction(int,...);//no. of parameters is unknown

And in main()

MyFunction(1,2,3,4);

The returned value should be 4.I've tried stdarg.h but to use that you have to know the number of parameters, so it doesn't hold up for me.Thanks!

Answer 1

Just return the number of arguments in a parameter pack.

template<typename ...Args>
unsigned MyFunction(Args... args) {
    return sizeof...(args);
}

int main() {
    return MyFunction(1,2,3);
}