设计模式总篇-解释器模式

/*
@作者：莫忘输赢
@时间：
2020/02/23 6:43
@版本：v1

@解释器模式：

@实现：
实现一个小型解释器所用模式
*/

#include<iostream>
#include<vector>
#include<string>

//using namespace std;
//#include <vld.h>


class Context;
class AbstractExpression
{
public:
	virtual void Interpret(Context *context) = 0;
};

class Expression : public AbstractExpression
{
	virtual void Interpret(Context *context)
	{
		std::cout << "终端解释器" << std::endl;
	}
};
class NonterminalExpression : public AbstractExpression
{
	virtual void Interpret(Context *context)
	{
		std::cout << "非终端解释器" << std::endl;
	}
};
class Context
{
public:
	std::string input;
	std::string output;

};
int main()
{
	Context* context = new Context();
	std::vector<AbstractExpression*> expressList;
	Expression *expression= new Expression();
	expressList.push_back(expression);
	NonterminalExpression  *nonterminalExpression = new NonterminalExpression();
	expressList.push_back(nonterminalExpression);

	std::vector<AbstractExpression*> ::iterator p = expressList.begin();
	while (p != expressList.end())
	{
		(*p)->Interpret(context);
		p++;
	}

	delete nonterminalExpression;
	delete expression;
	delete context;
	
	expressList.clear();

	return 0;
}