special">;</span>       
  <span class="keyword">typedef</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">input_iterator_tag</span>  <a name="boost.date_time.date_itr_base.iterator_category"></a><span class="identifier">iterator_category</span><span class="special">;</span>

  <span class="comment">// <a class="link" href="date_itr_base.html#boost.date_time.date_itr_baseconstruct-copy-destruct">construct/copy/destruct</a></span>
  <a class="link" href="date_i