#include <iostream>
#include <functional>
 
struct Bar {
    int z;
 
	Bar(int z) : z(z) {}
 
	void add(int x, int y) { std::cout << x + y + z << std::endl; }
};
 
template <typename T, typename Ft, Ft ff>
struct Foo {
	template <typename... Arguments>
	void execute(Arguments... args) {
		T d(3);
 
		std::function<void(T&, Arguments...)> f = ff;
		f(d, args ...);
	}
};
 
int main() {
	auto b = Foo<Bar, decltype(&Bar::add), &Bar::add>();
	b.execute(4, 5);
 
	return 0;
}
 

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