class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
  <span class="keyword">void</span> <a class="link" href="basic_regex.html#idp114734496-bb"><span class="identifier">swap</span></a><span class="special">(</span><a class="link" href="basic_regex.html" title="Struct template basic_regex">basic_regex</a><span class="special">&lt;</span> <span class="identifier">BidiIter</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">)</s