rward_iteratable&lt;T,
            P&gt;</a></code></li>
          </ul>
        </td>
      </tr>

      <tr valign="baseline">
        <td><code><a name=
        "bidirectional_iterator_helper">bidirectional_iterator_helper&lt;T,
        V, D, P, R&gt;</a></code></td>

        <td>
          Supports the operations and has the requirements of

          <ul>
            <li><code><a href=
            "#bidirectional_iteratable">bidirectional_iteratable&lt;T,
            P&gt;</a></code></li>
          </u