>
  <span class="comment">// types</span>
  <span class="keyword">typedef</span> <span class="emphasis"><em><span class="identifier">unspecified</span></em></span>                 <a name="boost.compute.buffer_iterator.super_type"></a><span class="identifier">super_type</span><span class="special">;</span>     
  <span class="keyword">typedef</span> <span class="identifier">super_type</span><span class="special">::</span><span class="identifier">reference</span>       <a name="boost.compute.buffer_iterator.