late Pattern". C++ Report, Feb. 1995) enables the base <tt>indexing_suite</tt> class to call policy function of the most derived class </td>
          <td>&nbsp; </td>
        </tr>
      </table>
      <pre>
    template &lt;<br>        class Container,<br>        bool NoProxy = false,<br>        class DerivedPolicies = unspecified_default<br>    class map_indexing_suite : unspecified_base<br>    {<br>    public:<br><br>        typedef typename Container::value_type value_type;<br>        typedef typename 