DesignPattern/24.VisitorPattern/2.Code/Demo.h

#ifndef __DEMO_H__
#define __DEMO_H__

// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> Visitor
class Visitor
{
public:
	virtual ~Visitor() {}
	virtual void visit(ConcreteElementA*) = 0;
	virtual void visit(ConcreteElementB*) = 0;
};

// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> ConcreteVisitor
class ConcreteVisitor :public Visitor
{
public:
	// ʵ<><CAB5>һ<EFBFBD><D2BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ض<EFBFBD>Ԫ<EFBFBD>صķ<D8B5><C4B7>ʲ<EFBFBD><CAB2><EFBFBD>
	void visit(ConcreteElementA*){
		// Ԫ<><D4AA>A<EFBFBD>ķ<EFBFBD><C4B7>ʲ<EFBFBD><CAB2><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	}
	void visit(ConcreteElementB*){
		// Ԫ<><D4AA>B<EFBFBD>ķ<EFBFBD><C4B7>ʲ<EFBFBD><CAB2><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	}
};

// <20><><EFBFBD><EFBFBD>Ԫ<EFBFBD><D4AA>
class Element
{
public:
	virtual ~Element() {}
	// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>󷽷<EFBFBD><F3B7BDB7><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ߵ<EFBFBD>ָ<EFBFBD><D6B8><EFBFBD><EFBFBD>Ϊ<EFBFBD><CEAA><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	virtual void accept(Visitor*) = 0;
};

// <20><><EFBFBD><EFBFBD>Ԫ<EFBFBD><D4AA>
class ConcreteElement :public Element
{
public:
	void accept(Visitor* visitor){
		visitor->visit(this);
	}
};

// <20><><EFBFBD><EFBFBD><EFBFBD>ṹ
class ObjectStructure
{
public:
	//  <20>ṩ<EFBFBD>ӿڽ<D3BF><DABD>ܷ<EFBFBD><DCB7><EFBFBD><EFBFBD>߷<EFBFBD><DFB7><EFBFBD>
	void accept(Visitor* visitor){
		// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʶ<EFBFBD><CAB6><EFBFBD><EFBFBD>ṹ<EFBFBD>е<EFBFBD>Ԫ<EFBFBD><D4AA>
		for (){
			elementList[i]->accept(visitor);
		}
	}
	void addElement(){}
	void removeElement(){}
private:
	lsit<Element*>elementList;
};

#endif