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<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <title>Class template date_duration</title> <link rel="stylesheet" href="../../../../doc/src/boostbook.css" type="text/css"> <meta name="generator" content="DocBook XSL Stylesheets V1.78.1"> <link rel="home" href="../../index.html" title="The Boost C++ Libraries BoostBook Documentation Subset"> <link rel="up" href="../../date_time/doxy.html#header.boost.date_time.date_duration_hpp" title="Header <boost/date_time/date_duration.hpp>"> <link rel="prev" href="day_clock.html" title="Class template day_clock"> <link rel="next" href="duration_traits_long.html" title="Struct duration_traits_long"> </head> <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> <table cellpadding="2" width="100%"><tr> <td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../boost.png"></td> <td align="center"><a href="../../../../index.html">Home</a></td> <td align="center"><a href="../../../../libs/libraries.htm">Libraries</a></td> <td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> <td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> <td align="center"><a href="../../../../more/index.htm">More</a></td> </tr></table> <hr> <div class="spirit-nav"> <a accesskey="p" href="day_clock.html"><img src="../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../date_time/doxy.html#header.boost.date_time.date_duration_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="duration_traits_long.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a> </div> <div class="refentry"> <a name="boost.date_time.date_duration"></a><div class="titlepage"></div> <div class="refnamediv"> <h2>Class template date_duration</h2> boost::date_time::date_duration — Duration type with date level resolution. </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">// In header: <<a class="link" href="../../date_time/doxy.html#header.boost.date_time.date_duration_hpp" title="Header <boost/date_time/date_duration.hpp>">boost/date_time/date_duration.hpp</a>> template<typename duration_rep_traits> class <a class="link" href="date_duration.html" title="Class template date_duration">date_duration</a> : private boost::less_than_comparable1< date_duration< duration_rep_traits >, boost::equality_comparable1< date_duration< duration_rep_traits >, boost::addable1< date_duration< duration_rep_traits >, boost::subtractable1< date_duration< duration_rep_traits >, boost::dividable2< date_duration< duration_rep_traits >, int > > > > > { public: // types typedef duration_rep_traits::int_type <a name="boost.date_time.date_duration.duration_rep_type"></a>duration_rep_type; typedef duration_rep_traits::impl_type <a name="boost.date_time.date_duration.duration_rep"></a>duration_rep; // <a class="link" href="date_duration.html#boost.date_time.date_durationconstruct-copy-destruct">construct/copy/destruct</a> explicit <a class="link" href="date_duration.html#idp113239072-bb">date_duration</a>(duration_rep); <a class="link" href="date_duration.html#idp105140336-bb">date_duration</a>(special_values); <a class="link" href="date_duration.html#idp38444208-bb">date_duration</a>(const <a class="link" href="date_duration.html" title="Class template date_duration">date_duration</a>< duration_rep_traits > &); // <a class="link" href="date_duration.html#idp100962896-bb">public member functions</a> duration_rep <a class="link" href="date_duration.html#idp99951696-bb">get_rep</a>() const; bool <a class="link" href="date_duration.html#idp98385808-bb">is_special</a>() const; duration_rep_type <a class="link" href="date_duration.html#idp107058784-bb">days</a>() const; bool <a class="link" href="date_duration.html#idp107028336-bb">operator==</a>(const <a class="link" href="date_duration.html" title="Class template date_duration">date_duration</a> &) const; bool <a class="link" href="date_duration.html#idp55417152-bb">operator<</a>(const <a class="link" href="date_duration.html" title="Class template date_duration">date_duration</a> &) const; <a class="link" href="date_duration.html" title="Class template date_duration">date_duration</a> & <a class="link" href="date_duration.html#idp70186608-bb">operator-=</a>(const <a class="link" href="date_duration.html" title="Class template date_duration">date_duration</a> &); <a class="link" href="date_duration.html" title="Class template date_duration">date_duration</a> & <a class="link" href="date_duration.html#idp105040032-bb">operator+=</a>(const <a class="link" href="date_duration.html" title="Class template date_duration">date_duration</a> &); <a class="link" href="date_duration.html" title="Class template date_duration">date_duration</a> <a class="link" href="date_duration.html#idp96827328-bb">operator-</a>() const; <a class="link" href="date_duration.html" title="Class template date_duration">date_duration</a> & <a class="link" href="date_duration.html#idp74369712-bb">operator/=</a>(int); bool <a class="link" href="date_duration.html#idp110799904-bb">is_negative</a>() const; // <a class="link" href="date_duration.html#idp44073248-bb">public static functions</a> static <a class="link" href="date_duration.html" title="Class template date_duration">date_duration</a> <a class="link" href="date_duration.html#idp44073808-bb">unit</a>(); };</pre></div> <div class="refsect1"> <a name="idp182928224"></a><h2>Description</h2> <div class="refsect2"> <a name="idp182928640"></a><h3> <a name="boost.date_time.date_durationconstruct-copy-destruct"></a><code class="computeroutput">date_duration</code> public construct/copy/destruct</h3> <div class="orderedlist"><ol class="orderedlist" type="1"> <li class="listitem"> <pre class="literallayout">explicit <a name="idp113239072-bb"></a>date_duration(duration_rep day_count);</pre>Construct from a day count. </li> <li class="listitem"> <pre class="literallayout"><a name="idp105140336-bb"></a>date_duration(special_values sv);</pre> construct from special_values - only works when instantiated with <code class="computeroutput"><a class="link" href="duration_traits_adapted.html" title="Struct duration_traits_adapted">duration_traits_adapted</a></code> </li> <li class="listitem"> <pre class="literallayout"><a name="idp38444208-bb"></a>date_duration(const <a class="link" href="date_duration.html" title="Class template date_duration">date_duration</a>< duration_rep_traits > & other);</pre>Construct from another <code class="computeroutput"><a class="link" href="date_duration.html" title="Class template date_duration">date_duration</a></code> (Copy Constructor) </li> </ol></div> </div> <div class="refsect2"> <a name="idp182951376"></a><h3> <a name="idp100962896-bb"></a><code class="computeroutput">date_duration</code> public member functions</h3> <div class="orderedlist"><ol class="orderedlist" type="1"> <li class="listitem"> <pre class="literallayout">duration_rep <a name="idp99951696-bb"></a>get_rep() const;</pre>returns days_ as it's instantiated type - used for streaming </li> <li class="listitem"><pre class="literallayout">bool <a name="idp98385808-bb"></a>is_special() const;</pre></li> <li class="listitem"> <pre class="literallayout">duration_rep_type <a name="idp107058784-bb"></a>days() const;</pre>returns days as value, not object. </li> <li class="listitem"> <pre class="literallayout">bool <a name="idp107028336-bb"></a>operator==(const <a class="link" href="date_duration.html" title="Class template date_duration">date_duration</a> & rhs) const;</pre>Equality. </li> <li class="listitem"> <pre class="literallayout">bool <a name="idp55417152-bb"></a>operator<(const <a class="link" href="date_duration.html" title="Class template date_duration">date_duration</a> & rhs) const;</pre>Less. </li> <li class="listitem"> <pre class="literallayout"><a class="link" href="date_duration.html" title="Class template date_duration">date_duration</a> & <a name="idp70186608-bb"></a>operator-=(const <a class="link" href="date_duration.html" title="Class template date_duration">date_duration</a> & rhs);</pre>Subtract another duration <ndash></ndash> result is signed. </li> <li class="listitem"> <pre class="literallayout"><a class="link" href="date_duration.html" title="Class template date_duration">date_duration</a> & <a name="idp105040032-bb"></a>operator+=(const <a class="link" href="date_duration.html" title="Class template date_duration">date_duration</a> & rhs);</pre>Add a duration <ndash></ndash> result is signed. </li> <li class="listitem"> <pre class="literallayout"><a class="link" href="date_duration.html" title="Class template date_duration">date_duration</a> <a name="idp96827328-bb"></a>operator-() const;</pre>unary- Allows for dd = -date_duration(2); -> dd == -2 </li> <li class="listitem"> <pre class="literallayout"><a class="link" href="date_duration.html" title="Class template date_duration">date_duration</a> & <a name="idp74369712-bb"></a>operator/=(int divisor);</pre>Division operations on a duration with an integer. </li> <li class="listitem"> <pre class="literallayout">bool <a name="idp110799904-bb"></a>is_negative() const;</pre>return sign information </li> </ol></div> </div> <div class="refsect2"> <a name="idp183019216"></a><h3> <a name="idp44073248-bb"></a><code class="computeroutput">date_duration</code> public static functions</h3> <div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem"> <pre class="literallayout">static <a class="link" href="date_duration.html" title="Class template date_duration">date_duration</a> <a name="idp44073808-bb"></a>unit();</pre>Returns the smallest duration <ndash></ndash> used by to calculate 'end'. </li></ol></div> </div> </div> </div> <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> <td align="left"></td> <td align="right"><div class="copyright-footer">Copyright © 2001-2005 CrystalClear Software, IncSubject to the Boost Software License, Version 1.0. (See accompanying file <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>) </div></td> </tr></table> <hr> <div class="spirit-nav"> <a accesskey="p" href="day_clock.html"><img src="../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../date_time/doxy.html#header.boost.date_time.date_duration_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="duration_traits_long.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a> </div> </body> </html>