      <li><code><a href=
            "#output_iteratable">output_iteratable&lt;T&gt;</a></code></li>
          </ul>
          See also [<a href="#1">1</a>], [<a href="#2">2</a>].
        </td>
      </tr>

      <tr valign="baseline">
        <td><code><a name=
        "forward_iterator_helper">forward_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="#forward_iteratable">fo