         <a name="boost.interprocess.shared_ptr.reference"></a><span class="identifier">reference</span><span class="special">;</span>              
  <span class="keyword">typedef</span> <span class="emphasis"><em><span class="identifier">unspecified</span></em></span>                                                                                                               <a name="boost.interprocess.shared_ptr.const_reference"></a><span class="identifier">const_reference</span><span class="special">;<