正则表达式备忘录

// boost_regex_test.cpp : Defines the entry point for the console application.//#include "stdafx.h"#pragma comment(lib, "libboost_regex-vc90-mt-gd-1_43.lib")#include "boost/regex/v4/regex.hpp"#include <iostream>#include <string>#include "boost/regex/v4/match_results.hpp"#include "boost/regex/v4/regex_split.hpp"//#include ""using namespace std;void xxxx(){boost::regex reg("(new)|(delete)"); boost::smatch m; //boost::match_results mrs;std::string s= "Calls to new must be (delete delete) followed by delete. / Calling simply new results in a leak!"; if (boost::regex_search(s,m,reg)) {// Did new match? if (m[1].matched) std::cout << "The expression (new) matched!/n"; if (m[2].matched) std::cout << "The expression (delete) matched!/n"; } }//替换字符串函数void  string_replace( std::string &strBig, const std::string &strsrc, const std::string &strdst )  {  std::string::size_type pos = 0;  std::string::size_type srclen = strsrc.size();  std::string::size_type dstlen = strdst.size();  while( (pos=strBig.find(strsrc, pos)) != std::string::npos )  {  strBig.replace( pos, srclen, strdst );  pos += dstlen;  }  }  void ForRegexTest2(){//?和*给非程序人员定义的通配符std::string iniStr("s?h?i?t*on y*o*u");std::string exprEvaluatedFromIniStr(iniStr);//在这里把通配符替换成正则表达式语法string_replace(exprEvaluatedFromIniStr,  string("?"), string(".{0,6}"));string_replace(exprEvaluatedFromIniStr,  string("*"), string(".{0,1}"));boost::regex expression(exprEvaluatedFromIniStr, boost::regex::perl | boost::regex::icase);boost::smatch what;std::string instr("xx dfd sxh i~t hahahahah shit on y o u");if (boost::regex_search(instr, what, expression)){size_t tmpSize = what.size();for (size_t i = 0; i < what.size(); ++i){cout<< "Match String: " << what[i].str() << endl;cout << "Match Position: " << what.position(i) << endl;cout << "matchResults prefix: " << what.prefix() << endl;cout << "matchResults suffix: " << what.suffix() << endl;cout << "After first found string: " << instr.substr(what.position(i) + what.length(i)) << endl;std::string mingganci(what[i]);size_t foundPos = instr.find(mingganci);instr.replace(foundPos, mingganci.length(), mingganci.length(), '*'); std::cout<<instr<<std::endl;}}}int _tmain(int argc, _TCHAR* argv[]){ForRegexTest2();return 0;}

20140122: 这两天研究了一下正则表达式，备忘之 ...