#include <iostream>
#include <functional>
#include <vector>
 
using namespace std;
 
template<typename... TArgs>
    class Delegate;
template<typename... TArgs>
    class Delegate<void, TArgs...>
    {
        private:
            typedef std::function<void(TArgs...)> Func;
            std::vector<Func> funcs;
 
        public:
            template<typename T> Delegate& operator+=(T mFunc) { funcs.push_back(Func(mFunc)); return *this; }
            void operator()(TArgs... mParams) { /*for (auto& f : funcs) f(mParams...);* gcc 4.5 does not support ranged based for*/ }
    };
 
    void test(int x, int y) { x - y; }
int main()
{
Delegate<void, int, int> d2;
d2 += test;
}

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