标签：style cout ssi ace let VID exp out reg
Boost.Regex provides three different functions to search for regular expressions
1. regex_match
#include <boost/regex.hpp> #include <string> #include <iostream> int main() { std::string s = "Boost Libraries"; boost::regex expr("\\w+\\s\\w+"); std::cout << std::boolalpha << boost::regex_match(s, expr) << std::endl; return 0; }
boost::regex_match() compares a string with a regular expression. It will return true only if the expression matches the complete string.
2. regex_search
#include <boost/regex.hpp> #include <string> #include <iostream> int main() { std::string s = "Boost Libraries"; boost::regex expr("(\\w+)\\s(\\w+)"); boost::smatch what; if (boost::regex_search(s, what, expr)) { std::cout << what[0] << std::endl; std::cout << what[1] << "_" << what[2] << std::endl; } return 0; }
3. regex_replace
#include <boost/regex.hpp> #include <string> #include <iostream> int main() { std::string s = " Boost Libraries"; boost::regex expr("\\s"); std::string fmt("_"); std::cout << boost::regex_replace(s, expr, fmt) << std::endl; return 0; }
标签：style cout ssi ace let VID exp out reg
原文地址：https://www.cnblogs.com/sssblog/p/10981214.html
