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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 — 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: <<a class="link" href="../../date_time/doxy.html#header.boost.date_time.local_timezone_defs_hpp" title="Header <boost/date_time/local_timezone_defs.hpp>">boost/date_time/local_timezone_defs.hpp</a>> 34 35</span><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> date_type<span class="special">></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"><</span> <span class="identifier">date_type</span> <span class="special">></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"><</span> <span class="identifier">date_type</span> <span class="special">></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#id-1_3_14_15_3_32_1_1_2_9-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#id-1_3_14_15_3_32_1_1_2_9_1-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#id-1_3_14_15_3_32_1_1_2_9_2-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#id-1_3_14_15_3_32_1_1_2_9_3-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#id-1_3_14_15_3_32_1_1_2_9_4-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#id-1_3_14_15_3_32_1_1_2_9_5-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#id-1_3_14_15_3_32_1_1_2_9_6-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#id-1_3_14_15_3_32_1_1_2_9_7-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#id-1_3_14_15_3_32_1_1_2_9_8-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#id-1_3_14_15_3_32_1_1_2_9_9-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="id-1.3.14.15.3.32.4.4"></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="id-1.3.14.15.3.32.4.4.3"></a><h3> 69<a name="id-1_3_14_15_3_32_1_1_2_9-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="id-1_3_14_15_3_32_1_1_2_9_1-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="id-1_3_14_15_3_32_1_1_2_9_2-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="id-1_3_14_15_3_32_1_1_2_9_3-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="id-1_3_14_15_3_32_1_1_2_9_4-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="id-1_3_14_15_3_32_1_1_2_9_5-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="id-1_3_14_15_3_32_1_1_2_9_6-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="id-1_3_14_15_3_32_1_1_2_9_7-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="id-1_3_14_15_3_32_1_1_2_9_8-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="id-1_3_14_15_3_32_1_1_2_9_9-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> 82</div> 83</div> 84<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 85<td align="left"></td> 86<td align="right"><div class="copyright-footer">Copyright © 2001-2005 CrystalClear Software, Inc<p>Subject to the Boost Software License, Version 1.0. (See accompanying file 87 <code class="filename">LICENSE_1_0.txt</code> or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)</p> 88</div></td> 89</tr></table> 90<hr> 91<div class="spirit-nav"> 92<a accesskey="p" href="acst_dst_trait.html"><img src="../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../date_time/doxy.html#header.boost.date_time.local_timezone_defs_hpp"><img src="../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="uk_dst_trait.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a> 93</div> 94</body> 95</html> 96
