template<typename ... TArgs>
void prn() {
	((cout << typeid(TArgs).name() << endl), ...);
};

template<typename Function>
struct f;

template<typename TReturn, typename... TArgs>
struct f<TReturn(TArgs...)> {
	f() {
		prn<TReturn(TArgs...)>();
		prn<TReturn>();
		prn<TArgs...>();
	}
};

int main() {
	using T = int(float, double);
	f<T>();
}