1<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 2<html> 3<head> 4<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 5<title>Class template time_resolution_traits</title> 6<link rel="stylesheet" href="../../../../doc/src/boostbook.css" type="text/css"> 7<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> 8<link rel="home" href="../../index.html" title="The Boost C++ Libraries BoostBook Documentation Subset"> 9<link rel="up" href="../../date_time/doxy.html#header.boost.date_time.time_resolution_traits_hpp" title="Header <boost/date_time/time_resolution_traits.hpp>"> 10<link rel="prev" href="parse_1_3_14_15_3_52_1_1_3.html" title="Function template parse_delimited_time_duration"> 11<link rel="next" href="time__1_3_14_15_3_53_1_1_2.html" title="Struct time_resolution_traits_adapted32_impl"> 12</head> 13<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> 14<table 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href="time__1_3_14_15_3_53_1_1_2.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a> 25</div> 26<div class="refentry"> 27<a name="boost.date_time.time_resolution_traits"></a><div class="titlepage"></div> 28<div class="refnamediv"> 29<h2><span class="refentrytitle">Class template time_resolution_traits</span></h2> 30<p>boost::date_time::time_resolution_traits</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.time_resolution_traits_hpp" title="Header <boost/date_time/time_resolution_traits.hpp>">boost/date_time/time_resolution_traits.hpp</a>> 34 35</span><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> frac_sec_type<span class="special">,</span> <span class="identifier">time_resolutions</span> res<span class="special">,</span> 36 <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">&&</span><span class="special">(</span><span class="identifier">_MSC_VER</span><span class="special"><</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> 37 <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> 38 <span class="preprocessor">#endif</span> <span class="keyword">unsigned</span> <span class="keyword">short</span> frac_digits<span class="special">,</span> 39 <span class="keyword">typename</span> var_type <span class="special">=</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">int64_t</span><span class="special">></span> 40<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> 41<span class="keyword">public</span><span class="special">:</span> 42 <span class="comment">// types</span> 43 <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> 44 <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> 45 <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> 46 <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> 47 <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> 48 <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> 49 <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> 50 51 <span class="comment">// <a class="link" href="time_resolution_traits.html#id-1_3_14_15_3_53_1_1_1_9-bb">public static functions</a></span> 52 <span class="keyword">static</span> <span class="identifier">BOOST_CXX14_CONSTEXPR</span> <span class="identifier">fractional_seconds_type</span> <a class="link" href="time_resolution_traits.html#id-1_3_14_15_3_53_1_1_1_9_1-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> 53 <span class="keyword">static</span> <span class="identifier">BOOST_CXX14_CONSTEXPR</span> <span class="keyword">bool</span> <a class="link" href="time_resolution_traits.html#id-1_3_14_15_3_53_1_1_1_9_2-bb"><span class="identifier">is_adapted</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span> 54 <span class="keyword">static</span> <span class="identifier">BOOST_CXX14_CONSTEXPR</span> <span class="identifier">time_resolutions</span> <a class="link" href="time_resolution_traits.html#id-1_3_14_15_3_53_1_1_1_9_3-bb"><span class="identifier">resolution</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span> 55 <span class="keyword">static</span> <span class="identifier">BOOST_CXX14_CONSTEXPR</span> <span class="keyword">unsigned</span> <span class="keyword">short</span> <a class="link" href="time_resolution_traits.html#id-1_3_14_15_3_53_1_1_1_9_4-bb"><span class="identifier">num_fractional_digits</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span> 56 <span class="keyword">static</span> <span class="identifier">BOOST_CXX14_CONSTEXPR</span> <span class="identifier">fractional_seconds_type</span> <a class="link" href="time_resolution_traits.html#id-1_3_14_15_3_53_1_1_1_9_5-bb"><span class="identifier">res_adjust</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span> 57 <span class="keyword">static</span> <span class="identifier">BOOST_CXX14_CONSTEXPR</span> <span class="identifier">tick_type</span> 58 <a class="link" href="time_resolution_traits.html#id-1_3_14_15_3_53_1_1_1_9_6-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> 59 60 <span class="comment">// <a class="link" href="time_resolution_traits.html#id-1_3_14_15_3_53_1_1_1_10-bb">public member functions</a></span> 61 <a class="link" href="time_resolution_traits.html#id-1_3_14_15_3_53_1_1_1_10_1-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> 62 <a class="link" href="time_resolution_traits.html#id-1_3_14_15_3_53_1_1_1_10_2-bb"><span class="identifier">BOOST_STATIC_CONSTANT</span></a><span class="special">(</span><span class="identifier">fractional_seconds_type</span><span class="special">,</span> 63 <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> 64<span class="special">}</span><span class="special">;</span></pre></div> 65<div class="refsect1"> 66<a name="id-1.3.14.15.3.52.3.4"></a><h2>Description</h2> 67<div class="refsect2"> 68<a name="id-1.3.14.15.3.52.3.4.2"></a><h3> 69<a name="id-1_3_14_15_3_53_1_1_1_9-bb"></a><code class="computeroutput">time_resolution_traits</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">BOOST_CXX14_CONSTEXPR</span> <span class="identifier">fractional_seconds_type</span> <a name="id-1_3_14_15_3_53_1_1_1_9_1-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> 72<li class="listitem"><pre class="literallayout"><span class="keyword">static</span> <span class="identifier">BOOST_CXX14_CONSTEXPR</span> <span class="keyword">bool</span> <a name="id-1_3_14_15_3_53_1_1_1_9_2-bb"></a><span class="identifier">is_adapted</span><span class="special">(</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">BOOST_CXX14_CONSTEXPR</span> <span class="identifier">time_resolutions</span> <a name="id-1_3_14_15_3_53_1_1_1_9_3-bb"></a><span class="identifier">resolution</span><span class="special">(</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">BOOST_CXX14_CONSTEXPR</span> <span class="keyword">unsigned</span> <span class="keyword">short</span> <a name="id-1_3_14_15_3_53_1_1_1_9_4-bb"></a><span class="identifier">num_fractional_digits</span><span class="special">(</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="identifier">BOOST_CXX14_CONSTEXPR</span> <span class="identifier">fractional_seconds_type</span> <a name="id-1_3_14_15_3_53_1_1_1_9_5-bb"></a><span class="identifier">res_adjust</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre></li> 76<li class="listitem"> 77<pre class="literallayout"><span class="keyword">static</span> <span class="identifier">BOOST_CXX14_CONSTEXPR</span> <span class="identifier">tick_type</span> 78<a name="id-1_3_14_15_3_53_1_1_1_9_6-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> 79 <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> 80</ol></div> 81</div> 82<div class="refsect2"> 83<a name="id-1.3.14.15.3.52.3.4.3"></a><h3> 84<a name="id-1_3_14_15_3_53_1_1_1_10-bb"></a><code class="computeroutput">time_resolution_traits</code> public member functions</h3> 85<div class="orderedlist"><ol class="orderedlist" type="1"> 86<li class="listitem"><pre class="literallayout"> <a name="id-1_3_14_15_3_53_1_1_1_10_1-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> 87<li class="listitem"><pre class="literallayout"> <a name="id-1_3_14_15_3_53_1_1_1_10_2-bb"></a><span class="identifier">BOOST_STATIC_CONSTANT</span><span class="special">(</span><span class="identifier">fractional_seconds_type</span><span class="special">,</span> 88 <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> 89</ol></div> 90</div> 91</div> 92</div> 93<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 94<td align="left"></td> 95<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 96 <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> 97</div></td> 98</tr></table> 99<hr> 100<div class="spirit-nav"> 101<a accesskey="p" href="parse_1_3_14_15_3_52_1_1_3.html"><img src="../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../date_time/doxy.html#header.boost.date_time.time_resolution_traits_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="time__1_3_14_15_3_53_1_1_2.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a> 102</div> 103</body> 104</html> 105
