>=</span> <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_default</span><span class="special">);</span>
</pre>
<p>
        <span class="bold"><strong>Effects</strong></span>: returns a <a class="link" href="regex_token_iterator.html" title="regex_token_iterator"><code class="computeroutput"><span class="identifier">regex_token_iterator</span></code></a> that enumerates
        one <a class="link" href="sub_match.html" title="sub_match"><code class