ring_type</span><span class="special">;</span>    
  <span class="keyword">typedef</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">istreambuf_iterator</span><span class="special">&lt;</span> <span class="identifier">charT</span> <span class="special">&gt;</span>         <a name="boost.date_time.special_values_parser.stream_itr_type"></a><span class="identifier">stream_itr_type</span><span class="special">;</span>
  <span class="keyword">typedef</span> <span 