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 unit</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="../../boost_units/Reference.html#header.boost.units.unit_hpp" title="Header <boost/units/unit.hpp>"> 10<link rel="prev" href="root__1_3_44_10_2_42_1_1_3.html" title="Struct template root_typeof_helper<unit< Dim, System >, static_rational< N, D >>"> 11<link rel="next" href="amount_base_dimension.html" title="Struct amount_base_dimension"> 12</head> 13<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> 14<table cellpadding="2" width="100%"><tr> 15<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../boost.png"></td> 16<td align="center"><a href="../../../../index.html">Home</a></td> 17<td align="center"><a href="../../../../libs/libraries.htm">Libraries</a></td> 18<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> 19<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> 20<td align="center"><a href="../../../../more/index.htm">More</a></td> 21</tr></table> 22<hr> 23<div class="spirit-nav"> 24<a accesskey="p" href="root__1_3_44_10_2_42_1_1_3.html"><img src="../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../boost_units/Reference.html#header.boost.units.unit_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="amount_base_dimension.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a> 25</div> 26<div class="refentry"> 27<a name="boost.units.unit"></a><div class="titlepage"></div> 28<div class="refnamediv"> 29<h2><span class="refentrytitle">Class template unit</span></h2> 30<p>boost::units::unit — class representing a model-dependent unit with no associated value </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="../../boost_units/Reference.html#header.boost.units.unit_hpp" title="Header <boost/units/unit.hpp>">boost/units/unit.hpp</a>> 34 35</span><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Dim<span class="special">,</span> <span class="keyword">typename</span> System<span class="special">,</span> <span class="keyword">typename</span> Enable<span class="special">></span> 36<span class="keyword">class</span> <a class="link" href="unit.html" title="Class template unit">unit</a> <span class="special">{</span> 37<span class="keyword">public</span><span class="special">:</span> 38 <span class="comment">// types</span> 39 <span class="keyword">typedef</span> <a class="link" href="unit.html" title="Class template unit">unit</a><span class="special"><</span> <span class="identifier">Dim</span><span class="special">,</span> <span class="identifier">System</span> <span class="special">></span> <a name="boost.units.unit.unit_type"></a><span class="identifier">unit_type</span><span class="special">;</span> 40 <span class="keyword">typedef</span> <a class="link" href="unit.html" title="Class template unit">unit</a><span class="special"><</span> <span class="identifier">Dim</span><span class="special">,</span> <span class="identifier">System</span> <span class="special">></span> <a name="boost.units.unit.this_type"></a><span class="identifier">this_type</span><span class="special">;</span> 41 <span class="keyword">typedef</span> <span class="identifier">Dim</span> <a name="boost.units.unit.dimension_type"></a><span class="identifier">dimension_type</span><span class="special">;</span> 42 <span class="keyword">typedef</span> <span class="identifier">System</span> <a name="boost.units.unit.system_type"></a><span class="identifier">system_type</span><span class="special">;</span> 43 44 <span class="comment">// <a class="link" href="unit.html#boost.units.unitconstruct-copy-destruct">construct/copy/destruct</a></span> 45 <a class="link" href="unit.html#id-1_3_44_10_2_42_1_1_4_9-bb"><span class="identifier">unit</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span> 46 <a class="link" href="unit.html#id-1_3_44_10_2_42_1_1_4_10-bb"><span class="identifier">unit</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">this_type</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> 47 <span class="identifier">BOOST_CXX14_CONSTEXPR</span> <span class="identifier">this_type</span> <span class="special">&</span> <a class="link" href="unit.html#id-1_3_44_10_2_42_1_1_4_11-bb"><span class="keyword">operator</span><span class="special">=</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">this_type</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> 48<span class="special">}</span><span class="special">;</span></pre></div> 49<div class="refsect1"> 50<a name="id-1.3.44.10.2.42.6.4"></a><h2>Description</h2> 51<p>(e.g. meters, Kelvin, feet, etc...) </p> 52<div class="refsect2"> 53<a name="id-1.3.44.10.2.42.6.4.3"></a><h3> 54<a name="boost.units.unitconstruct-copy-destruct"></a><code class="computeroutput">unit</code> 55 public 56 construct/copy/destruct</h3> 57<div class="orderedlist"><ol class="orderedlist" type="1"> 58<li class="listitem"><pre class="literallayout"><a name="id-1_3_44_10_2_42_1_1_4_9-bb"></a><span class="identifier">unit</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre></li> 59<li class="listitem"><pre class="literallayout"><a name="id-1_3_44_10_2_42_1_1_4_10-bb"></a><span class="identifier">unit</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">this_type</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span></pre></li> 60<li class="listitem"><pre class="literallayout"><span class="identifier">BOOST_CXX14_CONSTEXPR</span> <span class="identifier">this_type</span> <span class="special">&</span> <a name="id-1_3_44_10_2_42_1_1_4_11-bb"></a><span class="keyword">operator</span><span class="special">=</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">this_type</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span></pre></li> 61</ol></div> 62</div> 63</div> 64</div> 65<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 66<td align="left"></td> 67<td align="right"><div class="copyright-footer">Copyright © 2003-2008 Matthias Christian Schabel<br>Copyright © 2007-2010 Steven 68 Watanabe<p> 69 Distributed under the Boost Software License, Version 1.0. (See accompanying 70 file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) 71 </p> 72</div></td> 73</tr></table> 74<hr> 75<div class="spirit-nav"> 76<a accesskey="p" href="root__1_3_44_10_2_42_1_1_3.html"><img src="../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../boost_units/Reference.html#header.boost.units.unit_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="amount_base_dimension.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a> 77</div> 78</body> 79</html> 80
