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<title>Class template time_resolution_traits</title>
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<h2><span class="refentrytitle">Class template time_resolution_traits</span></h2>
<p>boost::date_time::time_resolution_traits</p>
</div>
<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: &lt;<a class="link" href="../../date_time/doxy.html#header.boost.date_time.time_resolution_traits_hpp" title="Header &lt;boost/date_time/time_resolution_traits.hpp&gt;">boost/date_time/time_resolution_traits.hpp</a>&gt;

</span><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> frac_sec_type<span class="special">,</span> <span class="identifier">time_resolutions</span> res<span class="special">,</span> 
         <span class="preprocessor">#if</span><span class="special">(</span><span class="identifier">defined</span><span class="special">(</span><span class="identifier">BOOST_MSVC</span><span class="special">)</span><span class="special">&amp;&amp;</span><span class="special">(</span><span class="identifier">_MSC_VER</span><span class="special">&lt;</span> <span class="number">1300</span><span class="special">)</span><span class="special">)</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">int64_t</span> resolution_adjust<span class="special">,</span> 
         <span class="preprocessor">#else</span> <span class="keyword">typename</span> <span class="identifier">frac_sec_type</span><span class="special">::</span><span class="identifier">int_type</span> resolution_adjust<span class="special">,</span> 
         <span class="preprocessor">#endif</span> <span class="keyword">unsigned</span> <span class="keyword">short</span> frac_digits<span class="special">,</span> 
         <span class="keyword">typename</span> var_type <span class="special">=</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">int32_t</span><span class="special">&gt;</span> 
<span class="keyword">class</span> <a class="link" href="time_resolution_traits.html" title="Class template time_resolution_traits">time_resolution_traits</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">frac_sec_type</span><span class="special">::</span><span class="identifier">int_type</span>  <a name="boost.date_time.time_resolution_traits.fractional_seconds_type"></a><span class="identifier">fractional_seconds_type</span><span class="special">;</span>
  <span class="keyword">typedef</span> <span class="identifier">frac_sec_type</span><span class="special">::</span><span class="identifier">int_type</span>  <a name="boost.date_time.time_resolution_traits.tick_type"></a><span class="identifier">tick_type</span><span class="special">;</span>              
  <span class="keyword">typedef</span> <span class="identifier">frac_sec_type</span><span class="special">::</span><span class="identifier">impl_type</span> <a name="boost.date_time.time_resolution_traits.impl_type"></a><span class="identifier">impl_type</span><span class="special">;</span>              
  <span class="keyword">typedef</span> <span class="identifier">var_type</span>                 <a name="boost.date_time.time_resolution_traits.day_type"></a><span class="identifier">day_type</span><span class="special">;</span>               
  <span class="keyword">typedef</span> <span class="identifier">var_type</span>                 <a name="boost.date_time.time_resolution_traits.hour_type"></a><span class="identifier">hour_type</span><span class="special">;</span>              
  <span class="keyword">typedef</span> <span class="identifier">var_type</span>                 <a name="boost.date_time.time_resolution_traits.min_type"></a><span class="identifier">min_type</span><span class="special">;</span>               
  <span class="keyword">typedef</span> <span class="identifier">var_type</span>                 <a name="boost.date_time.time_resolution_traits.sec_type"></a><span class="identifier">sec_type</span><span class="special">;</span>               

  <span class="comment">// <a class="link" href="time_resolution_traits.html#idm45507089039552-bb">public static functions</a></span>
  <span class="keyword">static</span> <span class="identifier">fractional_seconds_type</span> <a class="link" href="time_resolution_traits.html#idm45507089038992-bb"><span class="identifier">as_number</span></a><span class="special">(</span><span class="identifier">impl_type</span><span class="special">)</span><span class="special">;</span>
  <span class="keyword">static</span> <span class="keyword">bool</span> <a class="link" href="time_resolution_traits.html#idm45507089037184-bb"><span class="identifier">is_adapted</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
  <span class="keyword">static</span> <span class="identifier">time_resolutions</span> <a class="link" href="time_resolution_traits.html#idm45507091756720-bb"><span class="identifier">resolution</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
  <span class="keyword">static</span> <span class="keyword">unsigned</span> <span class="keyword">short</span> <a class="link" href="time_resolution_traits.html#idm45507091755600-bb"><span class="identifier">num_fractional_digits</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
  <span class="keyword">static</span> <span class="identifier">fractional_seconds_type</span> <a class="link" href="time_resolution_traits.html#idm45507091754480-bb"><span class="identifier">res_adjust</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
  <span class="keyword">static</span> <span class="identifier">tick_type</span> 
  <a class="link" href="time_resolution_traits.html#idm45507159539968-bb"><span class="identifier">to_tick_count</span></a><span class="special">(</span><span class="identifier">hour_type</span><span class="special">,</span> <span class="identifier">min_type</span><span class="special">,</span> <span class="identifier">sec_type</span><span class="special">,</span> <span class="identifier">fractional_seconds_type</span><span class="special">)</span><span class="special">;</span>

  <span class="comment">// <a class="link" href="time_resolution_traits.html#idm45507086401168-bb">public member functions</a></span>
   <a class="link" href="time_resolution_traits.html#idm45507086400608-bb"><span class="identifier">BOOST_STATIC_CONSTANT</span></a><span class="special">(</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">int64_t</span><span class="special">,</span> <span class="identifier">ticks_per_second</span> <span class="special">=</span> <span class="identifier">resolution_adjust</span><span class="special">)</span><span class="special">;</span>
   <a class="link" href="time_resolution_traits.html#idm45507155152912-bb"><span class="identifier">BOOST_STATIC_CONSTANT</span></a><span class="special">(</span><span class="identifier">fractional_seconds_type</span><span class="special">,</span> 
                         <span class="identifier">ticks_per_second</span> <span class="special">=</span> <span class="identifier">resolution_adjust</span><span class="special">)</span><span class="special">;</span>
<span class="special">}</span><span class="special">;</span></pre></div>
<div class="refsect1">
<a name="idm45555362778496"></a><h2>Description</h2>
<div class="refsect2">
<a name="idm45555362778080"></a><h3>
<a name="idm45507089039552-bb"></a><code class="computeroutput">time_resolution_traits</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">fractional_seconds_type</span> <a name="idm45507089038992-bb"></a><span class="identifier">as_number</span><span class="special">(</span><span class="identifier">impl_type</span> i<span class="special">)</span><span class="special">;</span></pre></li>
<li class="listitem"><pre class="literallayout"><span class="keyword">static</span> <span class="keyword">bool</span> <a name="idm45507089037184-bb"></a><span class="identifier">is_adapted</span><span class="special">(</span><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_resolutions</span> <a name="idm45507091756720-bb"></a><span class="identifier">resolution</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre></li>
<li class="listitem"><pre class="literallayout"><span class="keyword">static</span> <span class="keyword">unsigned</span> <span class="keyword">short</span> <a name="idm45507091755600-bb"></a><span class="identifier">num_fractional_digits</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre></li>
<li class="listitem"><pre class="literallayout"><span class="keyword">static</span> <span class="identifier">fractional_seconds_type</span> <a name="idm45507091754480-bb"></a><span class="identifier">res_adjust</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre></li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">static</span> <span class="identifier">tick_type</span> 
<a name="idm45507159539968-bb"></a><span class="identifier">to_tick_count</span><span class="special">(</span><span class="identifier">hour_type</span> hours<span class="special">,</span> <span class="identifier">min_type</span> minutes<span class="special">,</span> <span class="identifier">sec_type</span> seconds<span class="special">,</span> 
              <span class="identifier">fractional_seconds_type</span> fs<span class="special">)</span><span class="special">;</span></pre>Any negative argument results in a negative tick_count. </li>
</ol></div>
</div>
<div class="refsect2">
<a name="idm45555362739504"></a><h3>
<a name="idm45507086401168-bb"></a><code class="computeroutput">time_resolution_traits</code> public member functions</h3>
<div class="orderedlist"><ol class="orderedlist" type="1">
<li class="listitem"><pre class="literallayout"> <a name="idm45507086400608-bb"></a><span class="identifier">BOOST_STATIC_CONSTANT</span><span class="special">(</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">int64_t</span><span class="special">,</span> <span class="identifier">ticks_per_second</span> <span class="special">=</span> <span class="identifier">resolution_adjust</span><span class="special">)</span><span class="special">;</span></pre></li>
<li class="listitem"><pre class="literallayout"> <a name="idm45507155152912-bb"></a><span class="identifier">BOOST_STATIC_CONSTANT</span><span class="special">(</span><span class="identifier">fractional_seconds_type</span><span class="special">,</span> 
                       <span class="identifier">ticks_per_second</span> <span class="special">=</span> <span class="identifier">resolution_adjust</span><span class="special">)</span><span class="special">;</span></pre></li>
</ol></div>
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