pan><span class="special">::</span><span class="identifier">pointer</span>         <a name="boost.heap.skew_heap.implementation_defined.node_pointer"></a><span class="identifier">node_pointer</span><span class="special">;</span>       
  <span class="keyword">typedef</span> <span class="identifier">allocator_type</span><span class="special">::</span><span class="identifier">const_pointer</span>   <a name="boost.heap.skew_heap.implementation_defined.const_node_pointer"></a><span class="identifier">const_node