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  26 <div class="refentry">
  27 <a name="boost.date_time.eu_dst_trait"></a><div class="titlepage"></div>
  28 <div class="refnamediv">
  29 <h2><span class="refentrytitle">Struct template eu_dst_trait</span></h2>
  30 <p>boost::date_time::eu_dst_trait &#8212; Rules for daylight savings start in the EU (Last Sun in Mar) </p>
  31 </div>
  32 <h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
  33 <div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: &lt;<a class="link" href="../../date_time/doxy.html#header.boost.date_time.local_timezone_defs_hpp" title="Header &lt;boost/date_time/local_timezone_defs.hpp&gt;">boost/date_time/local_timezone_defs.hpp</a>&gt;
  34
  35 </span><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> date_type<span class="special">&gt;</span>
  36 <span class="keyword">struct</span> <a class="link" href="eu_dst_trait.html" title="Struct template eu_dst_trait">eu_dst_trait</a> <span class="special">{</span>
  37   <span class="comment">// types</span>
  38   <span class="keyword">typedef</span> <span class="identifier">date_type</span><span class="special">::</span><span class="identifier">day_of_week_type</span>                <a name="boost.date_time.eu_dst_trait.day_of_week_type"></a><span class="identifier">day_of_week_type</span><span class="special">;</span>
  39   <span class="keyword">typedef</span> <span class="identifier">date_type</span><span class="special">::</span><span class="identifier">month_type</span>                      <a name="boost.date_time.eu_dst_trait.month_type"></a><span class="identifier">month_type</span><span class="special">;</span>
  40   <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.eu_dst_trait.year_type"></a><span class="identifier">year_type</span><span class="special">;</span>
  41   <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">&lt;</span> <span class="identifier">date_type</span> <span class="special">&gt;</span> <a name="boost.date_time.eu_dst_trait.start_rule_functor"></a><span class="identifier">start_rule_functor</span><span class="special">;</span>
  42   <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">&lt;</span> <span class="identifier">date_type</span> <span class="special">&gt;</span> <a name="boost.date_time.eu_dst_trait.end_rule_functor"></a><span class="identifier">end_rule_functor</span><span class="special">;</span>
  43
  44   <span class="comment">// <a class="link" href="eu_dst_trait.html#idp496599376-bb">public static functions</a></span>
  45   <span class="keyword">static</span> <span class="identifier">day_of_week_type</span> <a class="link" href="eu_dst_trait.html#idp496599936-bb"><span class="identifier">start_day</span></a><span class="special">(</span><span class="identifier">year_type</span><span class="special">)</span><span class="special">;</span>
  46   <span class="keyword">static</span> <span class="identifier">month_type</span> <a class="link" href="eu_dst_trait.html#idp496601744-bb"><span class="identifier">start_month</span></a><span class="special">(</span><span class="identifier">year_type</span><span class="special">)</span><span class="special">;</span>
  47   <span class="keyword">static</span> <span class="identifier">day_of_week_type</span> <a class="link" href="eu_dst_trait.html#idp496603552-bb"><span class="identifier">end_day</span></a><span class="special">(</span><span class="identifier">year_type</span><span class="special">)</span><span class="special">;</span>
  48   <span class="keyword">static</span> <span class="identifier">month_type</span> <a class="link" href="eu_dst_trait.html#idp496605360-bb"><span class="identifier">end_month</span></a><span class="special">(</span><span class="identifier">year_type</span><span class="special">)</span><span class="special">;</span>
  49   <span class="keyword">static</span> <span class="keyword">int</span> <a class="link" href="eu_dst_trait.html#idp496607168-bb"><span class="identifier">dst_start_offset_minutes</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
  50   <span class="keyword">static</span> <span class="keyword">int</span> <a class="link" href="eu_dst_trait.html#idp496608304-bb"><span class="identifier">dst_end_offset_minutes</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
  51   <span class="keyword">static</span> <span class="keyword">int</span> <a class="link" href="eu_dst_trait.html#idp496609424-bb"><span class="identifier">dst_shift_length_minutes</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
  52   <span class="keyword">static</span> <span class="identifier">date_type</span> <a class="link" href="eu_dst_trait.html#idp496610560-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>
  53   <span class="keyword">static</span> <span class="identifier">date_type</span> <a class="link" href="eu_dst_trait.html#idp496612368-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>
  54 <span class="special">}</span><span class="special">;</span></pre></div>
  55 <div class="refsect1">
  56 <a name="idp225708784"></a><h2>Description</h2>
  57 <p>These amount to the following:</p>
  58 <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
  59 <li class="listitem"><p>Start of dst day is last Sunday in March</p></li>
  60 <li class="listitem"><p>End day of dst is last Sunday in Oct</p></li>
  61 <li class="listitem"><p>Going forward switch time is 2:00 am (offset 120 minutes)</p></li>
  62 <li class="listitem"><p>Going back switch time is 3:00 am (off set 180 minutes)</p></li>
  63 <li class="listitem"><p>Shift duration is one hour (60 minutes) </p></li>
  64 </ul></div>
  65 <p>
  66 </p>
  67 <div class="refsect2">
  68 <a name="idp225712128"></a><h3>
  69 <a name="idp496599376-bb"></a><code class="computeroutput">eu_dst_trait</code> public static functions</h3>
  70 <div class="orderedlist"><ol class="orderedlist" type="1">
  71 <li class="listitem"><pre class="literallayout"><span class="keyword">static</span> <span class="identifier">day_of_week_type</span> <a name="idp496599936-bb"></a><span class="identifier">start_day</span><span class="special">(</span><span class="identifier">year_type</span><span class="special">)</span><span class="special">;</span></pre></li>
  72 <li class="listitem"><pre class="literallayout"><span class="keyword">static</span> <span class="identifier">month_type</span> <a name="idp496601744-bb"></a><span class="identifier">start_month</span><span class="special">(</span><span class="identifier">year_type</span><span class="special">)</span><span class="special">;</span></pre></li>
  73 <li class="listitem"><pre class="literallayout"><span class="keyword">static</span> <span class="identifier">day_of_week_type</span> <a name="idp496603552-bb"></a><span class="identifier">end_day</span><span class="special">(</span><span class="identifier">year_type</span><span class="special">)</span><span class="special">;</span></pre></li>
  74 <li class="listitem"><pre class="literallayout"><span class="keyword">static</span> <span class="identifier">month_type</span> <a name="idp496605360-bb"></a><span class="identifier">end_month</span><span class="special">(</span><span class="identifier">year_type</span><span class="special">)</span><span class="special">;</span></pre></li>
  75 <li class="listitem"><pre class="literallayout"><span class="keyword">static</span> <span class="keyword">int</span> <a name="idp496607168-bb"></a><span class="identifier">dst_start_offset_minutes</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre></li>
  76 <li class="listitem"><pre class="literallayout"><span class="keyword">static</span> <span class="keyword">int</span> <a name="idp496608304-bb"></a><span class="identifier">dst_end_offset_minutes</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre></li>
  77 <li class="listitem"><pre class="literallayout"><span class="keyword">static</span> <span class="keyword">int</span> <a name="idp496609424-bb"></a><span class="identifier">dst_shift_length_minutes</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre></li>
  78 <li class="listitem"><pre class="literallayout"><span class="keyword">static</span> <span class="identifier">date_type</span> <a name="idp496610560-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>
  79 <li class="listitem"><pre class="literallayout"><span class="keyword">static</span> <span class="identifier">date_type</span> <a name="idp496612368-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>
  80 </ol></div>
  81 </div>
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