| <html> |
| <head> |
| <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> |
| <title>Struct _byval</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="../../proto/reference.html#header.boost.proto.transform.arg_hpp" title="Header <boost/proto/transform/arg.hpp>"> |
| <link rel="prev" href="_byref/result_This_T__id1291225.html" title="Struct template result<This(T)>"> |
| <link rel="next" href="_byval/result_This_boost_refer_id1291431.html" title="Struct template result<This(boost::reference_wrapper< T >)>"> |
| </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="_byref/result_This_T__id1291225.html"><img src="../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../proto/reference.html#header.boost.proto.transform.arg_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="_byval/result_This_boost_refer_id1291431.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a> |
| </div> |
| <div class="refentry"> |
| <a name="boost.proto._byval"></a><div class="titlepage"></div> |
| <div class="refnamediv"> |
| <h2><span class="refentrytitle">Struct _byval</span></h2> |
| <p>boost::proto::_byval — |
| A unary callable <a class="link" href="../../PolymorphicFunctionObject.html" title="Concept PolymorphicFunctionObject">PolymorphicFunctionObject</a> that strips references and |
| <code class="computeroutput">boost::reference_wrapper<></code> from its argument. |
| </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="../../proto/reference.html#header.boost.proto.transform.arg_hpp" title="Header <boost/proto/transform/arg.hpp>">boost/proto/transform/arg.hpp</a>> |
| |
| </span> |
| <span class="keyword">struct</span> <a class="link" href="_byval.html" title="Struct _byval">_byval</a> <span class="special">:</span> <span class="keyword"></span> <a class="link" href="callable.html" title="Struct callable">proto::callable</a> <span class="special">{</span> |
| <span class="comment">// member classes/structs/unions</span> |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> This<span class="special">,</span> <span class="keyword">typename</span> T<span class="special">></span> |
| <span class="keyword">struct</span> <a class="link" href="_byval/result_This_boost_refer_id1291431.html" title="Struct template result<This(boost::reference_wrapper< T >)>">result</a><span class="special"><</span><span class="identifier">This</span><span class="special">(</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">reference_wrapper</span><span class="special"><</span> <span class="identifier">T</span> <span class="special">></span><span class="special">)</span><span class="special">></span> <span class="special">:</span> <span class="keyword"></span> <span class="identifier">result</span><span class="special"><</span><span class="identifier">This</span><span class="special">(</span><span class="identifier">T</span><span class="special">)</span><span class="special">></span> <span class="special">{</span> |
| <span class="special">}</span><span class="special">;</span> |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> This<span class="special">,</span> <span class="keyword">typename</span> T<span class="special">></span> |
| <span class="keyword">struct</span> <a class="link" href="_byval/result_This_T____id1291461.html" title="Struct template result<This(T &)>">result</a><span class="special"><</span><span class="identifier">This</span><span class="special">(</span><span class="identifier">T</span> <span class="special">&</span><span class="special">)</span><span class="special">></span> <span class="special">:</span> <span class="keyword"></span> <span class="identifier">result</span><span class="special"><</span><span class="identifier">This</span><span class="special">(</span><span class="identifier">T</span><span class="special">)</span><span class="special">></span> <span class="special">{</span> |
| <span class="special">}</span><span class="special">;</span> |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> This<span class="special">,</span> <span class="keyword">typename</span> T<span class="special">></span> |
| <span class="keyword">struct</span> <a class="link" href="_byval/result_This_T__id1291491.html" title="Struct template result<This(T)>">result</a><span class="special"><</span><span class="identifier">This</span><span class="special">(</span><span class="identifier">T</span><span class="special">)</span><span class="special">></span> <span class="special">{</span> |
| <span class="comment">// types</span> |
| <span class="keyword">typedef</span> <span class="identifier">T</span> <a class="link" href="_byval/result_This_T__id1291491.html#boost.proto._byval.result_This(T)_id1291491.type"><span class="identifier">type</span></a><span class="special">;</span> |
| <span class="special">}</span><span class="special">;</span> |
| |
| <span class="comment">// <a class="link" href="_byval.html#id1291527-bb">public member functions</a></span> |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> T<span class="special">></span> <span class="identifier">T</span> <a class="link" href="_byval.html#id1291532-bb"><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span></a><span class="special">(</span><span class="identifier">T</span> <span class="keyword">const</span> <span class="special">&</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> T<span class="special">></span> |
| <span class="identifier">T</span> <a class="link" href="_byval.html#id1291588-bb"><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span></a><span class="special">(</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">reference_wrapper</span><span class="special"><</span> <span class="identifier">T</span> <span class="special">></span> <span class="keyword">const</span> <span class="special">&</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> |
| <span class="special">}</span><span class="special">;</span></pre></div> |
| <div class="refsect1"> |
| <a name="id2422278"></a><h2>Description</h2> |
| <p> |
| Example: |
| </p> |
| <pre class="programlisting"><a class="link" href="terminal.html" title="Struct template terminal">proto::terminal</a><span class="special"><</span><span class="keyword">int</span><span class="special">></span><span class="special">::</span><span class="identifier">type</span> <span class="identifier">i</span> <span class="special">=</span> <span class="special">{</span><span class="number">42</span><span class="special">}</span><span class="special">;</span> |
| <span class="keyword">int</span> <span class="identifier">j</span> <span class="special">=</span> <span class="number">67</span><span class="special">;</span> |
| <span class="keyword">int</span> <span class="identifier">k</span> <span class="special">=</span> <a class="link" href="when.html" title="Struct template when">proto::when</a><span class="special"><</span><a class="link" href="_.html" title="Struct _">proto::_</a><span class="special">,</span> <span class="identifier">proto</span><span class="special">::</span><span class="identifier">_byval</span><span class="special">(</span><a class="link" href="_state.html" title="Struct _state">proto::_state</a><span class="special">)</span><span class="special">></span><span class="special">(</span><span class="special">)</span><span class="special">(</span><span class="identifier">i</span><span class="special">,</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">ref</span><span class="special">(</span><span class="identifier">j</span><span class="special">)</span><span class="special">)</span><span class="special">;</span> |
| <span class="identifier">assert</span><span class="special">(</span> <span class="number">67</span> <span class="special">==</span> <span class="identifier">k</span> <span class="special">)</span><span class="special">;</span></pre> |
| <p> |
| </p> |
| <div class="refsect2"> |
| <a name="id2422538"></a><h3> |
| <a name="id1291527-bb"></a><code class="computeroutput">_byval</code> public member functions</h3> |
| <div class="orderedlist"><ol class="orderedlist" type="1"> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> T<span class="special">></span> <span class="identifier">T</span> <a name="id1291532-bb"></a><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span><span class="special">(</span><span class="identifier">T</span> <span class="keyword">const</span> <span class="special">&</span> t<span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre> |
| <div class="variablelist"><table border="0"> |
| <col align="left" valign="top"> |
| <tbody> |
| <tr> |
| <td><p><span class="term">Parameters:</span></p></td> |
| <td><div class="variablelist"><table border="0"> |
| <col align="left" valign="top"> |
| <tbody><tr> |
| <td><p><span class="term"><code class="computeroutput">t</code></span></p></td> |
| <td><p>The object to unref </p></td> |
| </tr></tbody> |
| </table></div></td> |
| </tr> |
| <tr> |
| <td><p><span class="term">Returns:</span></p></td> |
| <td><p> |
| <code class="computeroutput">t</code> |
| </p></td> |
| </tr> |
| <tr> |
| <td><p><span class="term">Throws:</span></p></td> |
| <td>Will not throw.</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> T<span class="special">></span> |
| <span class="identifier">T</span> <a name="id1291588-bb"></a><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span><span class="special">(</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">reference_wrapper</span><span class="special"><</span> <span class="identifier">T</span> <span class="special">></span> <span class="keyword">const</span> <span class="special">&</span> t<span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre> |
| <p>This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. </p> |
| </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 © 2008 Eric Niebler<p> |
| Distributed under the Boost Software License, Version 1.0. (See accompanying |
| 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>) |
| </p> |
| </div></td> |
| </tr></table> |
| <hr> |
| <div class="spirit-nav"> |
| <a accesskey="p" href="_byref/result_This_T__id1291225.html"><img src="../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../proto/reference.html#header.boost.proto.transform.arg_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="_byval/result_This_boost_refer_id1291431.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a> |
| </div> |
| </body> |
| </html> |