lass="special">&gt;&amp;</span> <span class="identifier">m1</span><span class="special">,</span>
         <span class="identifier">match_results</span><span class="special">&lt;</span><span class="identifier">BidirectionalIterator</span><span class="special">,</span> <span class="identifier">Allocator</span><span class="special">&gt;&amp;</span> <span class="identifier">m2</span><span class="special">);</span>
</pre>
<p>
        <span class="bold"><strong>Effects</strong></span>: Swaps the contents of the t