rrences
            of marked sub-expression sub in regular expression <span class="emphasis"><em>e</em></span>,
            found in text <span class="emphasis"><em>s</em></span>, using match_flags <span class="emphasis"><em>m</em></span>.
          </p>
<pre class="programlisting"><span class="keyword">template</span> <span class="special">&lt;</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">N</span><span class="specia