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28<h2><span class="refentrytitle">Class template dst_calc_engine</span></h2>
29<p>boost::date_time::dst_calc_engine &#8212; Compile-time configurable daylight savings time calculation engine. </p>
30</div>
31<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
32<div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="bold"><strong>template</strong></span>&lt;<span class="bold"><strong>typename</strong></span> date_type, <span class="bold"><strong>typename</strong></span> time_duration_type, <span class="bold"><strong>typename</strong></span> dst_traits&gt; 
33<span class="bold"><strong>class</strong></span> dst_calc_engine {
34<span class="bold"><strong>public</strong></span>:
35  <span class="emphasis"><em>// types</em></span>
36  <span class="bold"><strong>typedef</strong></span> date_type::year_type                            year_type;    
37  <span class="bold"><strong>typedef</strong></span> date_type::calendar_type                        calendar_type;
38  <span class="bold"><strong>typedef</strong></span> <a href="dst_calculator.html" title="Class template dst_calculator">dst_calculator</a>&lt; date_type, time_duration_type &gt; dstcalc;      
39
40  <span class="emphasis"><em>// <a href="dst_calc_engine.html#id2420605-bb">public static functions</a></em></span>
41  <span class="type">time_is_dst_result</span> 
42  <a href="dst_calc_engine.html#id2416353-bb">local_is_dst</a>(<span class="bold"><strong>const</strong></span> date_type &amp;, <span class="bold"><strong>const</strong></span> time_duration_type &amp;) ;
43  <span class="type"><span class="bold"><strong>bool</strong></span></span> <a href="dst_calc_engine.html#id2423485-bb">is_dst_boundary_day</a>(date_type) ;
44  <span class="type">time_duration_type</span> <a href="dst_calc_engine.html#id2458677-bb">dst_offset</a>() ;
45  <span class="type">date_type</span> <a href="dst_calc_engine.html#id2508391-bb">local_dst_start_day</a>(year_type) ;
46  <span class="type">date_type</span> <a href="dst_calc_engine.html#id2522676-bb">local_dst_end_day</a>(year_type) ;
47};</pre></div>
48<div class="refsect1" lang="en">
49<a name="id2632457"></a><h2>Description</h2>
50<div class="refsect2" lang="en">
51<a name="id2632460"></a><h3>
52<a name="id2420605-bb"></a><code class="computeroutput">dst_calc_engine</code> public static functions</h3>
53<div class="orderedlist"><ol type="1">
54<li>
55<pre class="literallayout"><span class="type">time_is_dst_result</span> 
56<a name="id2416353-bb"></a>local_is_dst(<span class="bold"><strong>const</strong></span> date_type &amp; d, <span class="bold"><strong>const</strong></span> time_duration_type &amp; td) ;</pre>
57<p>Determines if the time is really in DST or not. Also checks for invalid and ambiguous.
58</p>
59</li>
60<li><pre class="literallayout"><span class="type"><span class="bold"><strong>bool</strong></span></span> <a name="id2423485-bb"></a>is_dst_boundary_day(date_type d) ;</pre></li>
61<li><pre class="literallayout"><span class="type">time_duration_type</span> <a name="id2458677-bb"></a>dst_offset() ;</pre></li>
62<li><pre class="literallayout"><span class="type">date_type</span> <a name="id2508391-bb"></a>local_dst_start_day(year_type year) ;</pre></li>
63<li><pre class="literallayout"><span class="type">date_type</span> <a name="id2522676-bb"></a>local_dst_end_day(year_type year) ;</pre></li>
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