Modern C++ Programming Cookbook

How to do it...

In order to perform text transformations using regular expressions, you should perform the following:

1. Include the <regex> and <string> and the namespace std::string_literals for C++14 standard user defined literals for strings:

        #include <regex>         #include <string>         using namespace std::string_literals;

2. Use the std::regex_replace() algorithm with a replacement string as the third argument. Consider this example: replace all words composed of exactly three characters that are either a, b, or c with three hyphens:

        auto text{"abc aa bca ca bbbb"s};         auto rx = std::regex{ R"(\b[a|b|c]{3}\b)"s };         auto newtext = std::regex_replace(text, rx, "---"s);

3. Use the std::regex_replace() algorithm with match identifiers prefixed with ...