code class="computeroutput"><span class="identifier">regex_token_iterator</span></code></a> is an iterator
        adapter; that is to say it represents a new view of an existing iterator
        sequence, by enumerating all the occurrences of a regular expression within
        that sequence, and presenting one or more character sequence for each match
        found. Each position enumerated by the iterator is a <a class="link" href="sub_match.html" title="sub_match"><code class="computeroutput"><span clas