Replacing the content of a string using regular expressions

In the previous two recipes, we looked at how to match a regular expression on a string or a part of a string and iterate through matches and submatches. The regular expression library also supports text replacement based on regular expressions. In this recipe, we will learn how to use std::regex_replace() to perform such text transformations.

Getting ready

For general information about regular expression support in C++11, refer to the Verifying the format of a string using regular expressions recipe earlier in this chapter.

How to do it...

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

• Include <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;
  

• Use the std::regex_replace...