<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <title>Class template is_reference_wrapper</title> <link rel="stylesheet" href="../../../doc/src/boostbook.css" type="text/css"> <meta name="generator" content="DocBook XSL Stylesheets V1.75.2"> <link rel="home" href="../index.html" title="The Boost C++ Libraries BoostBook Documentation Subset"> <link rel="up" href="../ref/reference.html#header.boost.ref_hpp" title="Header <boost/ref.hpp>"> <link rel="prev" href="reference_wrapper.html" title="Class template reference_wrapper"> <link rel="next" href="unwrap_reference.html" title="Class template unwrap_reference"> </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="reference_wrapper.html"><img src="../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../ref/reference.html#header.boost.ref_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="unwrap_reference.html"><img src="../../../doc/src/images/next.png" alt="Next"></a> </div> <div class="refentry"> <a name="boost.is_reference_wrapper"></a><div class="titlepage"></div> <div class="refnamediv"> <h2><span class="refentrytitle">Class template is_reference_wrapper</span></h2> <p>boost::is_reference_wrapper — Determine if a type <code class="computeroutput">T</code> is an instantiation of <code class="computeroutput"><a class="link" href="reference_wrapper.html" title="Class template reference_wrapper">reference_wrapper</a></code>.</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: <<a class="link" href="../ref/reference.html#header.boost.ref_hpp" title="Header <boost/ref.hpp>">boost/ref.hpp</a>> </span><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> T<span class="special">></span> <span class="keyword">class</span> <a class="link" href="is_reference_wrapper.html" title="Class template is_reference_wrapper">is_reference_wrapper</a> <span class="special">{</span> <span class="keyword">public</span><span class="special">:</span> <span class="comment">// static constants</span> <span class="keyword">static</span> <span class="keyword">const</span> <span class="keyword">bool</span> <span class="identifier">value</span> = <span class="identifier">unspecified</span><span class="special">;</span> <span class="special">}</span><span class="special">;</span></pre></div> <div class="refsect1"> <a name="id2534805"></a><h2>Description</h2> <p>The <code class="computeroutput">value</code> static constant will be <code class="computeroutput">true</code> iff the type <code class="computeroutput">T</code> is a specialization of <code class="computeroutput"><a class="link" href="reference_wrapper.html" title="Class template reference_wrapper">reference_wrapper</a></code>.</p> </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 © 1999, 2000 Jaakko Järvi<br>Copyright © 2001, 2002 Peter Dimov<br>Copyright © 2002 David Abrahams<p>Subject 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>. </p> </div></td> </tr></table> <hr> <div class="spirit-nav"> <a accesskey="p" href="reference_wrapper.html"><img src="../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../ref/reference.html#header.boost.ref_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="unwrap_reference.html"><img src="../../../doc/src/images/next.png" alt="Next"></a> </div> </body> </html>