        If T has a nested type allocator_type, returns t.get_allocator().
                  Otherwise returns a.
                </p>
              </td>
</tr></tbody>
</table></div>
<p>
        A program may specialise this traits type if the <code class="computeroutput">T</code> template
        parameter in the specialisation is a user-defined type. The template parameter
        <code class="computeroutput">Allocator</code> shall be a type meeting the Allocator requirements.
      </p>
<p>
        Speci