C++ 代理模式（Proxy Pattern）

随意写的，主要用作代码练习，防止代码生疏，敬请见谅！

本意是能够写成一个多用途的代理模式，结果还是写废了，其他方面来说，没有时间重整它，有的写法是没有太大意义的。期望有点价值吧

首先放一个代理模式的讲解，个人觉得写得不错，如果你是寻求代理模式的用法用途的话，值得一看：

代理模式原理及实例讲解

//ProxyPattern.h

#pragma once
#include <iostream>
#include <typeinfo>
#include <string>
template<typename ReturnValue,typename T,typename T2>
class IMutiUser
{
public:
    virtual	ReturnValue (T)(...)= 0;
	virtual ReturnValue GetReturnType()const = 0;
};
template<typename ReturnValue, typename T,typename T2>
class IMutiProxy :public IMutiUser<ReturnValue,T,T2>
{
protected:
	T2*  mMImpl;
public:
	virtual ReturnValue (T)(...) override;
	virtual ReturnValue GetReturnType()const override;
};
template<typename ReturnValue, typename T,typename T2>
ReturnValue IMutiProxy<ReturnValue,T,T2>::T(...)
{
	mMImpl = new T2();
	if (mMImpl != nullptr)
	{
		std::cout << "Show Something of IMutiProxy!" << std::endl;
		mMImpl->T();
	}
	ReturnValue temp= NULL;
	return temp;
}
template<typename ReturnValue, typename T,typename T2>
ReturnValue IMutiProxy<ReturnValue, T,T2>::GetReturnType()const
{
	ReturnValue temp=NULL;
	return temp;
}
template<typename ReturnValue, typename T,typename T2>
class IMutiImplement :public IMutiUser<ReturnValue,T,T2>
{
public:
	virtual ReturnValue(T)(...) override;
	virtual ReturnValue GetReturnType() const override;
};
template<typename ReturnValue, typename T,typename T2>
ReturnValue IMutiImplement<ReturnValue, T,T2>::T(...)
{
	std::cout << "show something!" << std::endl;
	std::cout << "You could dispose something for custom function ." << std::endl;
	ReturnValue temp=NULL;
	return temp;
}
template<typename ReturnValue, typename T,typename T2>
ReturnValue IMutiImplement<ReturnValue, T,T2>::GetReturnType() const
{
	ReturnValue temp=NULL;
	return temp;
}

//ProxyPattern.cpp

#include "ProxyPattern.h"
int show(int number)
{
	std::cout << "Current Number is :" + number << std::endl;
	return 1;
}
int main(...)
{
	int(*func)(int b);
	func = show;
	IMutiUser<int, decltype(func),IMutiImplement<int,decltype(func),void>>* temp = new IMutiProxy<int, decltype(func),IMutiImplement<int, decltype(func),void>>();
	temp->T();
	temp->GetReturnType();
	system("pause");
	return 0;
}