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<title>Class template us_dst_rules</title>
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<a name="boost.date_time.us_dst_rules"></a><div class="titlepage"></div>
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<h2><span class="refentrytitle">Class template us_dst_rules</span></h2>
<p>boost::date_time::us_dst_rules — Depricated: Class to calculate dst boundaries for US time zones. </p>
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<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
<div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: <<a class="link" href="../../date_time/doxy.html#header.boost.date_time.dst_rules_hpp" title="Header <boost/date_time/dst_rules.hpp>">boost/date_time/dst_rules.hpp</a>>
</span><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> date_type_<span class="special">,</span> <span class="keyword">typename</span> time_duration_type_<span class="special">,</span>
<span class="keyword">unsigned</span> <span class="keyword">int</span> dst_start_offset_minutes <span class="special">=</span> <span class="number">120</span><span class="special">,</span>
<span class="keyword">short</span> dst_length_minutes <span class="special">=</span> <span class="number">60</span><span class="special">></span>
<span class="keyword">class</span> <a class="link" href="us_dst_rules.html" title="Class template us_dst_rules">us_dst_rules</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">time_duration_type_</span> <a name="boost.date_time.us_dst_rules.time_duration_type"></a><span class="identifier">time_duration_type</span><span class="special">;</span>
<span class="keyword">typedef</span> <span class="identifier">date_type_</span> <a name="boost.date_time.us_dst_rules.date_type"></a><span class="identifier">date_type</span><span class="special">;</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.us_dst_rules.year_type"></a><span class="identifier">year_type</span><span class="special">;</span>
<span class="keyword">typedef</span> <span class="identifier">date_type</span><span class="special">::</span><span class="identifier">calendar_type</span> <a name="boost.date_time.us_dst_rules.calendar_type"></a><span class="identifier">calendar_type</span><span class="special">;</span>
<span class="keyword">typedef</span> <a class="link" href="last_kday_of_month.html" title="Class template last_kday_of_month">date_time::last_kday_of_month</a><span class="special"><</span> <span class="identifier">date_type</span> <span class="special">></span> <a name="boost.date_time.us_dst_rules.lkday"></a><span class="identifier">lkday</span><span class="special">;</span>
<span class="keyword">typedef</span> <a class="link" href="first_kday_of_month.html" title="Class template first_kday_of_month">date_time::first_kday_of_month</a><span class="special"><</span> <span class="identifier">date_type</span> <span class="special">></span> <a name="boost.date_time.us_dst_rules.fkday"></a><span class="identifier">fkday</span><span class="special">;</span>
<span class="keyword">typedef</span> <a class="link" href="nth_kday_of_month.html" title="Class template nth_kday_of_month">date_time::nth_kday_of_month</a><span class="special"><</span> <span class="identifier">date_type</span> <span class="special">></span> <a name="boost.date_time.us_dst_rules.nkday"></a><span class="identifier">nkday</span><span class="special">;</span>
<span class="keyword">typedef</span> <a class="link" href="dst_calculator.html" title="Class template dst_calculator">dst_calculator</a><span class="special"><</span> <span class="identifier">date_type</span><span class="special">,</span> <span class="identifier">time_duration_type</span> <span class="special">></span> <a name="boost.date_time.us_dst_rules.dstcalc"></a><span class="identifier">dstcalc</span><span class="special">;</span>
<span class="comment">// <a class="link" href="us_dst_rules.html#id378716-bb">public static functions</a></span>
<span class="keyword">static</span> <span class="identifier">time_is_dst_result</span>
<a class="link" href="us_dst_rules.html#id378719-bb"><span class="identifier">local_is_dst</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">date_type</span> <span class="special">&</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">time_duration_type</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">static</span> <span class="keyword">bool</span> <a class="link" href="us_dst_rules.html#id686267-bb"><span class="identifier">is_dst_boundary_day</span></a><span class="special">(</span><span class="identifier">date_type</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">static</span> <span class="identifier">date_type</span> <a class="link" href="us_dst_rules.html#id724618-bb"><span class="identifier">local_dst_start_day</span></a><span class="special">(</span><span class="identifier">year_type</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">static</span> <span class="identifier">date_type</span> <a class="link" href="us_dst_rules.html#id373813-bb"><span class="identifier">local_dst_end_day</span></a><span class="special">(</span><span class="identifier">year_type</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">static</span> <span class="identifier">time_duration_type</span> <a class="link" href="us_dst_rules.html#id704552-bb"><span class="identifier">dst_offset</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
<span class="special">}</span><span class="special">;</span></pre></div>
<div class="refsect1">
<a name="id1402108"></a><h2>Description</h2>
<div class="refsect2">
<a name="id1402112"></a><h3>
<a name="id378716-bb"></a><code class="computeroutput">us_dst_rules</code> public static functions</h3>
<div class="orderedlist"><ol class="orderedlist" type="1">
<li class="listitem">
<pre class="literallayout"><span class="keyword">static</span> <span class="identifier">time_is_dst_result</span>
<a name="id378719-bb"></a><span class="identifier">local_is_dst</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">date_type</span> <span class="special">&</span> d<span class="special">,</span> <span class="keyword">const</span> <span class="identifier">time_duration_type</span> <span class="special">&</span> td<span class="special">)</span><span class="special">;</span></pre>Calculates if the given local time is dst or not. <p>Determines if the time is really in DST or not. Also checks for invalid and ambiguous.
</p>
</li>
<li class="listitem"><pre class="literallayout"><span class="keyword">static</span> <span class="keyword">bool</span> <a name="id686267-bb"></a><span class="identifier">is_dst_boundary_day</span><span class="special">(</span><span class="identifier">date_type</span> d<span class="special">)</span><span class="special">;</span></pre></li>
<li class="listitem"><pre class="literallayout"><span class="keyword">static</span> <span class="identifier">date_type</span> <a name="id724618-bb"></a><span class="identifier">local_dst_start_day</span><span class="special">(</span><span class="identifier">year_type</span> year<span class="special">)</span><span class="special">;</span></pre></li>
<li class="listitem"><pre class="literallayout"><span class="keyword">static</span> <span class="identifier">date_type</span> <a name="id373813-bb"></a><span class="identifier">local_dst_end_day</span><span class="special">(</span><span class="identifier">year_type</span> year<span class="special">)</span><span class="special">;</span></pre></li>
<li class="listitem"><pre class="literallayout"><span class="keyword">static</span> <span class="identifier">time_duration_type</span> <a name="id704552-bb"></a><span class="identifier">dst_offset</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre></li>
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