Proxy(代理）-对象结构型模式

//Subject.h


#include <memory>

class Subject
{
public:
    virtual void Request() = 0;
};


class RealSubject : public Subject
{
public:
    void Request();
};

class Proxy : public Subject
{
public:
    Proxy();
    void Request();
private:
    std::shared_ptr<Subject> m_pSubject;
};

//Subject.cpp


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



void RealSubject::Request()
{
    std::cout<<"RealSubject Request Exectued" << std::endl;
}

Proxy::Proxy()
{
    m_pSubject = std::shared_ptr<Subject>(new RealSubject);
}

void Proxy::Request()
{
    m_pSubject->Request();
}

//Client.cpp



#include "Subject.h"

int main()
{
    std::shared_ptr<Subject> pProxy(new Proxy);
    pProxy->Request();

    while(1);
}