c++11中正则表达式的使用

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环境：Ubuntu 15.10 QtCreator CMake c++

头文件 #include <regex>

regex_search:

std::regex pattern;pattern = "(HTTP/1\\.1|HTTP/1\\.0) \\d{3} [ \\-a-zA-Z]+\r\n(.+: .+\r\n)+\r\n";    test = "HTTP/1.1 200 OK\r\n"           "Date: Thu, 24 Dec 2015 15:25:43 GMT\r\n"           "Server: Apache/2.2.15 (CentOS)\r\n"           "X-Powered-By: PHP/5.3.3\r\n"           "Set-Cookie: PHPSESSID=ioa4vje3mm8t3utigst4rjgdk4; path=/\r\n"           "Expires: Thu, 19 Nov 1981 08:52:00 GMT\r\n"           "Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0\r\n"           "Pragma: no-cache\r\n"           "Content-Length: 22\r\n"           "Connection: close\r\n"           "Content-Type: text/html; charset=utf-8\r\n"           "\r\n"            "cannot connect server\r\n";if(regex_search(test, pattern))        cout << "successful" << endl;    else        cout << "failed" << endl;

regex_match:

std::regex pattern;pattern = "^((\\d|[1-9]\\d|1\\d\\d|2[0-4]\\d|25[0-5])\\.){3}(\\d|[1-9]\\d|1\\d\\d|2[0-4]\\d|25[0-5])$";    test = "123.123.123.123";if(regex_search(test, pattern))        cout << "successful" << endl;    else        cout << "failed" << endl;

在使用过程中遇到的问题为换行符(\r\n)的匹配，找了一圈并没有找到有单行模式的选项，最后只能用regex_search来代替 regex_match的使用。

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