boost

1、匹配 InterGateway.Device.{i}.user 并替换为 InterGateway.Device.user

    

#include <iostream>
#include <string>
#include <boost/regex.hpp>

boost::regex reg("^(InterGateway\\.Device\\.)\\d\\.(user|name)$");

int main(int argc, char **argv)
{
    std::string str("InterGateway.Device.1.user");
    if(argc == 2)
    {
	str = argv[1];
    }
    std::cout << "test string:" << str << std::endl;
    boost::smatch what;

    if(boost::regex_match(str, what, reg))
    {
        std::cout << "match" << std::endl;
        std::string s = boost::regex_replace(str, reg, "$1$2");
	std::cout << "result:" << s << std::endl;
    }
    else
    {
        std::cout << "not match" << std::endl;
    }

    return 0;
}

　　编译 g++ -o boost_regex_test boost_regex_test.cpp -lboost_regex

需要安装 boost库

  下载：https://sourceforge.net/projects/boost/files/

  安装：

        tar -jxvf boost_1_53_0.tar.bz2

        cd boost_1_53_0

        ./bootstrap.sh --with-libraries=regex

        ./b2

        ./b2 install --prefix=/usr