         <span class="keyword">int</span> <span class="identifier">submatch</span> <span class="special">=</span> <span class="number">0</span><span class="special">,</span>
                     <span class="identifier">match_flag_type</span> <span class="identifier">m</span> <span class="special">=</span> <span class="identifier">match_default</span><span class="special">);</span>
</pre>
<p>
        <span class="bold"><strong>Preconditions</strong></span>: <code class="computeroutput"><span class="special"