Implementation of Delegates in C++ using Signal and Slot pattern

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

#include <algorithm>
#include "stdafx.h"
#include "CppSlot.h"

using namespace std;

class MyModel
{
public:

	void modelChanged()
	{
		m_signal.emit_sig(1);		
	} 

	CppSignal1<int,int> m_signal;
};

class MyView
{
public:

	MyView()
		: m_slot(this,&MyView::onModelChanged)
	{}

	int onModelChanged(int i)
	{
		cout << "model changed:" << i << endl;
		return 1;
	}

	CppSlot1<MyView,int,int> m_slot;
};

class MyView1
{
public:

	MyView1()
		: m_slot(this,&MyView1::onModelChanged)
	{}

	int onModelChanged(int i)
	{
		cout << "model changed 1:" << i << endl;
		return 2;
	}

	CppSlot1<MyView1,int,int> m_slot;
};

class ResponseAccumulator
{
	
public:
	
	typedef int return_type;
	template <typename iterator>
	int operator () (iterator begin,iterator end)
	{
		int sum = 0;
		for(iterator it=begin; it!=end; ++it)
			sum+=*it;

		return sum;
	}
	 
};

int _tmain(int argc, _TCHAR* argv[])
{
	// create model conaining CppSignal
	MyModel model;
	// create view with CppSlot
	MyView view;

	// connect signal to slot
	model.m_signal.connect(&view.m_slot);
	model.modelChanged();

	// create another 2 views and connect it to the model
	MyView1* view1 = new MyView1();
	model.m_signal.connect(&view1->m_slot);

	// use ResponseAccumulator function object 
	// to collect responses from models
	int res = model.m_signal.emit_sig(3,ResponseAccumulator());
	cout << "sum of responses is " << res << endl;

	// now we can delete second model end it
	// automatically disconnect itself from the 
	// model
	delete view1;
	res = model.m_signal.emit_sig(3,ResponseAccumulator());
	cout << "new sum of responses is " << res << endl;

	return 0;
}