reference"></a><span class="identifier">reference</span><span class="special">;</span>      
  <span class="keyword">typedef</span> <span class="identifier">super_type</span><span class="special">::</span><span class="identifier">difference_type</span> <a name="boost.compute.buffer_iterator.difference_type"></a><span class="identifier">difference_type</span><span class="special">;</span>

  <span class="comment">// <a class="link" href="buffer_iterator.html#boost.compute.buffer_iteratorconstruct-copy-destru