👾 原型模式(Prototype模式)

#include<iostream>
using namespace std;

class Prototype {
public:
    virtual ~Prototype();
    virtual Prototype* clone()const = 0;
protected:
    Prototype();
};

class ConcretePrototype :public Prototype {
public:
    ConcretePrototype()=default;
    ConcretePrototype(const ConcretePrototype&obj);//拷贝构造函数
    ~ConcretePrototype()=default;
    Prototype* clone()const;
};

Prototype::Prototype(){}
Prototype::~Prototype(){}

//拷贝构造函数
ConcretePrototype::ConcretePrototype(const ConcretePrototype& obj) {
    cout << "copy construct" << endl;
    //...再次进行浅拷贝或者深拷贝等操作
}

Prototype* ConcretePrototype::clone()const {
    return new ConcretePrototype(*this);
}


int main() {
    Prototype* prototype = new ConcretePrototype();
    Prototype* prototypeOther = prototype->clone();//copy construct
    delete prototype;
    delete prototypeOther;
    return 0;
}