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

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

using namespace std;

/*THIS IS THE OLD STRUCTURE*/
class Device
{
public:
	virtual void Print() = 0;
};

class InputDevice: public Device
{
public:
	void Print() override { cout << "InputDevicePrint" << endl; }

	virtual void InputPrint() = 0;
};

class InputOutputDevice: public Device
{
public:
	void Print() override { cout << "InputOutputDevicePrint" << endl; }

	virtual void InputPrint() = 0;
	virtual void OutputPrint() = 0;
};

class OldInput:public InputDevice
{
public:
	void InputPrint() override { cout << "OldInputPrint" << endl; }
};

class OldInputOutput:public InputOutputDevice
{
public:
	void InputPrint() override { cout << "OldInputPrint" << endl; }
	void OutputPrint() override { cout << "OldOutputPrint" << endl; }

};

/*THE NEW ENVELOPE*/
template <typename T> class NewInputDevice:public T
{
public:
	void Print() override { cout << "newPrint" << endl; }
	void InputPrint() override { cout << "NewInputPrint" << endl; }

};

class NewInputOutputPrint:public NewInputDevice<InputOutputDevice>
{
public:
	void OutputPrint() override { cout << "NewOutputPrint" << endl; }
};
int main()
{
	OldInput oInput;
	oInput.Print();					//Shows InputDevicePrint
	oInput.InputPrint();			//Shows OldInputPrint

	OldInputOutput oInputOutput;
	oInputOutput.Print();			//Shows InputDevicePrint
	oInputOutput.InputPrint();		//Shows OldInputPrint
	oInputOutput.OutputPrint();		//Shows OldOutputPrint

	NewInputDevice<InputDevice> nInput;
	nInput.Print();					//Shows NewPrint
	nInput.InputPrint();			//Shows NewInputPrint

	NewInputOutputPrint nInputOutpur;
	nInputOutpur.Print();			//Shows NewPrint
	nInputOutpur.InputPrint();		//Shows NewInputPrint
	nInputOutpur.OutputPrint();		//NewOutputPrint
	
	return 0;
}