an class="identifier">Traits</span><span class="special">::</span><span class="identifier">absorbs_identities</span> <span class="special">&gt;</span>                                              <a name="boost.icl.map.on_identity_absorbtion"></a><span class="identifier">on_identity_absorbtion</span><span class="special">;</span>    
  <span class="keyword">typedef</span> <span class="identifier">base_type</span><span class="special">::</span><span class="identifier">pointer</span>                          