ket</code>
                </p>
              </td>
<td>
                <p>
                  A type that satisfies the requirements of <code class="computeroutput">Destructible</code>
                  (C++Std [destructible]) and <code class="computeroutput">MoveConstructible</code> (C++Std
                  [moveconstructible]), and that is publicly and unambiguously derived
                  from <code class="computeroutput">basic_socket&lt;X&gt;</code>.
                </p>
              </td>
<td>
   