alc_engine.html" title="Class template dst_calc_engine">dst_calc_engine</a> <span class="special">{</span>
<span class="keyword">public</span><span class="special">:</span>
  <span class="comment">// types</span>
  <span class="keyword">typedef</span> <span class="identifier">date_type</span><span class="special">::</span><span class="identifier">year_type</span>                            <a name="boost.date_time.dst_calc_engine.year_type"></a><span class="identifier">year_type</span><span class="special">