pt Expr">Expr</a><span class="special">&gt;</span> <a class="link" href="basic_regex.html#idp114742656-bb"><span class="identifier">basic_regex</span></a><span class="special">(</span><span class="identifier">Expr</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  basic_regex&amp; <a class="link" href="basic_regex.html#idp114740688-bb"><span class="keyword">operator</span><span class="special">=</span></a><span class="sp