      </p>
            </td>
<td>
              <p>
                8.02
              </p>
            </td>
</tr>
</tbody>
</table></div>
</div>
<br class="table-break"><h5>
<a name="boost_typetraits.background.h4"></a>
      <span class="phrase"><a name="boost_typetraits.background.pair_of_references"></a></span><a class="link" href="background.html#boost_typetraits.background.pair_of_references">Pair
      of References</a>
    </h5>
<p>
      The optimized copy example shows how type traits may be used