Repeated Search

We will now introduce the concept of iterators in regular expressions.

It’s quite convenient to iterate with std::regex_iterator and std::regex_token_iterator over the matched texts. std::regex_iterator supports the matches and their capture groups. std::regex_token_iterator supports more. You can address the components of each capture and by using a negative index, your can access the text between the matches.


C++ defines the following four type synonyms for std::regex_iterator.

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