I'm trying to convert a string to a regex, string looks like so:
std::string term = "apples oranges"; and I wanted the regex to be term with all spaces replaced by any character and any length of characters and I thought that this might work:
boost::replace_all(term , " " , "[.*]"); std::regex rgx(s_term); so in std::regex_search term would return true when looking at:
std::string term = "apples pears oranges"; but its not working out, how do you do this properly?
You could do everything with basic_regex, no need for boost:
#include <iostream> #include <string> #include <regex> int main() { std::string search_term = "apples oranges"; search_term = std::regex_replace(search_term, std::regex("\\s+"), ".*"); std::string term = "apples pears oranges"; std::smatch matches; if (std::regex_search(term, matches, std::regex(search_term))) std::cout << "Match: " << matches[0] << std::endl; else std::cout << "No match!" << std::endl; return 0; } This will return when 1st occurrence of apples<something>oranges found. If you need match the whole string, use std::regex_match
You should use boost::replace_all(term , " " , ".*"); that is without the []. The .* simply means any character, and any number of them.
