// MoveTest.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <iostream>
#include <set>
#include <functional>

using namespace std;

template <typename ...Args>
    using delegate = std::function<void(Args...)>;


template <typename ...Args>
class Event
{
    private:
        using func = delegate<Args...>;
        std::set<func> eventSet;

    public:
        void operator+=(func f)
        {
            eventSet.insert(f);
        }

        void operator-=(func f)
        {
            eventSet.erase(f);
        }

        void operator()(Args...a)
        {
            for (auto x : eventSet)
                x(a...);
        }
};

void PrintNum(int x) {
    std::cout << x << std::endl;
}

int main() {

    int a = 45;

    Event<int> event;

    event += ([&](int x) { PrintNum(x); });

    event(3);

    system("pause");
    return 0;
};