n> as if by calling <code class="computeroutput"><span class="identifier">os</span>
        <span class="special">&lt;&lt;</span> <span class="identifier">m</span><span class="special">.</span><span class="identifier">str</span><span class="special">()</span></code>;
        Returns <span class="emphasis"><em>os</em></span>.
      </p>
<a name="boost_regex.match_results.op_swap"></a><pre class="programlisting"><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class