h_day_base</span></a><span class="special">(</span><span class="identifier">YearType</span><span class="special">,</span> <span class="identifier">MonthType</span><span class="special">,</span> <span class="identifier">DayType</span><span class="special">)</span><span class="special">;</span>

  <span class="comment">// public data members</span>
  <span class="identifier">YearType</span> <span class="identifier">year</span><span class="special">;</span>
  <span class="identifier">MonthType</span> <span cla