1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>is_rvalue_reference</title> 5<link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css"> 6<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> 7<link rel="home" href="../../index.html" title="Chapter 1. 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class="keyword">public</span> <em class="replaceable"><code><a class="link" href="integral_constant.html" title="integral_constant">true_type</a>-or-<a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code></em> <span class="special">{};</span> 31</pre> 32<p> 33 <span class="bold"><strong>Inherits:</strong></span> If T is an rvalue reference type 34 then inherits from <a class="link" href="integral_constant.html" title="integral_constant">true_type</a>, 35 otherwise inherits from <a class="link" href="integral_constant.html" title="integral_constant">false_type</a>. 36 </p> 37<p> 38 <span class="bold"><strong>C++ Standard Reference:</strong></span> 3.9.2 and 8.3.2. 39 </p> 40<p> 41 <span class="bold"><strong>Compiler Compatibility:</strong></span> All current compilers 42 are supported by this trait. 43 </p> 44<p> 45 <span class="bold"><strong>Header:</strong></span> <code class="computeroutput"> <span class="preprocessor">#include</span> 46 <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">is_rvalue_reference</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span></code> 47 or <code class="computeroutput"> <span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span></code> 48 </p> 49<p> 50 <span class="bold"><strong>Examples:</strong></span> 51 </p> 52<div class="blockquote"><blockquote class="blockquote"><p> 53 <code class="computeroutput"><span class="identifier">is_rvalue_reference</span><span class="special"><</span><span class="keyword">int</span><span class="special">&&></span></code> 54 inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>. 55 </p></blockquote></div> 56<div class="blockquote"><blockquote class="blockquote"><p> 57 <code class="computeroutput"><span class="identifier">is_rvalue_reference</span><span class="special"><</span><span class="keyword">int</span> <span class="keyword">const</span><span class="special">&&>::</span><span class="identifier">type</span></code> 58 is the type <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>. 59 </p></blockquote></div> 60<div class="blockquote"><blockquote class="blockquote"><p> 61 <code class="computeroutput"><span class="identifier">is_rvalue_reference</span><span class="special"><</span><span class="keyword">int</span> <span class="keyword">const</span><span class="special">&>::</span><span class="identifier">type</span></code> 62 is the type <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>. 63 </p></blockquote></div> 64<div class="blockquote"><blockquote class="blockquote"><p> 65 <code class="computeroutput"><span class="identifier">is_rvalue_reference</span><span class="special"><</span><span class="keyword">int</span> <span class="special">(&&)(</span><span class="keyword">long</span><span class="special">)>::</span><span class="identifier">value</span></code> is an integral constant expression 66 that evaluates to <span class="emphasis"><em>true</em></span> (the argument in this case 67 is an rvalue reference to a function). 68 </p></blockquote></div> 69<div class="blockquote"><blockquote class="blockquote"><p> 70 <code class="computeroutput"><span class="identifier">is_rvalue_reference</span><span class="special"><</span><span class="identifier">T</span><span class="special">>::</span><span class="identifier">value_type</span></code> is the type <code class="computeroutput"><span class="keyword">bool</span></code>. 71 </p></blockquote></div> 72</div> 73<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 74<td align="left"></td> 75<td align="right"><div class="copyright-footer">Copyright © 2000, 2011 Adobe Systems Inc, David Abrahams, 76 Frederic Bron, Steve Cleary, Beman Dawes, Glen Fernandes, Aleksey Gurtovoy, 77 Howard Hinnant, Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander 78 Nasonov, Thorsten Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert 79 Stewart and Steven Watanabe<p> 80 Distributed under the Boost Software License, Version 1.0. (See accompanying 81 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>) 82 </p> 83</div></td> 84</tr></table> 85<hr> 86<div class="spirit-nav"> 87<a accesskey="p" href="is_reference.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><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="is_same.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a> 88</div> 89</body> 90</html> 91
