l">{</span> AS_OPEN_RANGE, AS_CLOSED_RANGE <span class="special">}</span><span class="special">;</span>

  <span class="comment">// <a class="link" href="period_parser.html#boost.date_time.period_parserconstruct-copy-destruct">construct/copy/destruct</a></span>
  <a class="link" href="period_parser.html#id-1_3_14_15_3_37_1_1_1_16-bb"><span class="identifier">period_parser</span></a><span class="special">(</span><span class="identifier">period_range_option</span> <span class="special">=</span> <span class="i