#include <iostream>
	
	template<typename... Ts>
	void expander(Ts&&... ts)
	{
	    int dummy[sizeof...(Ts)] = {(std::forward<Ts>(ts)(), 0)...};
	}
	void f()
	{
	    std::cout << __PRETTY_FUNCTION__ << std::endl;
	}
	int main()
	{
	    expander(f, f, f);
	    expander();
	}