="identifier">date_type</span><span class="special">,</span> <span class="identifier">time_duration_type</span> <span class="special">&gt;</span> <a name="boost.date_time.dst_calc_engine.dstcalc"></a><span class="identifier">dstcalc</span><span class="special">;</span>      

  <span class="comment">// <a class="link" href="dst_calc_engine.html#id-1_3_14_15_3_23_2_1_2_6-bb">public static functions</a></span>
  <span class="keyword">static</span> <span class="identifier">time_is_dst_result</span> 
  <a class