c++设计模式-行为型模式-解释器模式

#include "andexpression.h" AndExpression::AndExpression(IExpression *pCity, IExpression *pPerson) { this->pCity = pCity; this->pPerson = pPerson; } bool AndExpression::interpret(const string &info) { vector<string> infos; if (split(info, infos) != 2) { return false; } return pCity->interpret(infos.at(0)) && pPerson->interpret(infos.at(1)); } size_t AndExpression::split(const string &info, vector<string> &infos) { // 分割字符 string spStr = "的"; // 起始位置 size_t pos = 0; while (true) { size_t npos = info.find(spStr, pos); // 未找到分割字符 if (npos == string::npos) { infos.push_back(info.substr(pos, info.size() - 1)); break; } // 截取字符串 string str = info.substr(pos, npos); // 定义下个位置 pos = npos + spStr.size(); infos.push_back(str); } return info.size(); }