on_defined.child_list_iterator"></a><span class="identifier">child_list_iterator</span><span class="special">;</span>
  <span class="keyword">typedef</span> <span class="emphasis"><em><span class="identifier">unspecified</span></em></span>                     <a name="boost.heap.skew_heap.implementation_defined.iterator"></a><span class="identifier">iterator</span><span class="special">;</span>           
  <span class="keyword">typedef</span> <span class="identifier">iterator</span>                        