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>Struct template as_expr</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="../../../proto/reference.html#header.boost.proto.traits_hpp" title="Header <boost/proto/traits.hpp>"> 10<link rel="prev" href="../tag/function.html" title="Struct function"> 11<link rel="next" href="as_expr/resu_1_3_33_5_39_2_1_4_1_4.html" title="Struct template result<This(T)>"> 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="../tag/function.html"><img src="../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../../proto/reference.html#header.boost.proto.traits_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="as_expr/resu_1_3_33_5_39_2_1_4_1_4.html"><img src="../../../../../doc/src/images/next.png" alt="Next"></a> 25</div> 26<div class="refentry"> 27<a name="boost.proto.functional.as_expr"></a><div class="titlepage"></div> 28<div class="refnamediv"> 29<h2><span class="refentrytitle">Struct template as_expr</span></h2> 30<p>boost::proto::functional::as_expr — A callable <a class="link" href="../../../PolymorphicFunctionObject.html" title="Concept PolymorphicFunctionObject">PolymorphicFunctionObject</a> that is equivalent to the 31 <code class="computeroutput"><a class="link" href="../as_expr.html" title="Function as_expr">proto::as_expr()</a></code> function. 32 </p> 33</div> 34<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2> 35<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.traits_hpp" title="Header <boost/proto/traits.hpp>">boost/proto/traits.hpp</a>> 36 37</span><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> <a class="link" href="../../../Domain.html" title="Concept Domain">Domain</a> <span class="special">=</span> <a class="link" href="../default_domain.html" title="Struct default_domain">proto::default_domain</a><span class="special">></span> 38<span class="keyword">struct</span> <a class="link" href="as_expr.html" title="Struct template as_expr">as_expr</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> 39 <span class="comment">// member classes/structs/unions</span> 40 <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> 41 <span class="keyword">struct</span> <a class="link" href="as_expr/resu_1_3_33_5_39_2_1_4_1_4.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="keyword"></span> <a class="link" href="../result_of/as_expr.html" title="Struct template as_expr">proto::result_of::as_expr</a><span class="special"><</span> <span class="keyword">typename</span> <span class="identifier">remove_reference</span><span class="special"><</span> <span class="identifier">T</span> <span class="special">></span><span class="special">::</span><span class="identifier">type</span><span class="special">,</span> <span class="identifier">Domain</span> <span class="special">></span> 42 <span class="special">{</span> 43 <span class="special">}</span><span class="special">;</span> 44 45 <span class="comment">// <a class="link" href="as_expr.html#id-1_3_33_5_39_2_1_4_1_5-bb">public member functions</a></span> 46 <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> T<span class="special">></span> 47 <span class="keyword">typename</span> <a class="link" href="../result_of/as_expr.html" title="Struct template as_expr">proto::result_of::as_expr</a><span class="special"><</span> <span class="identifier">T</span><span class="special">,</span> <span class="identifier">Domain</span> <span class="special">></span><span class="special">::</span><span class="identifier">type</span> 48 <a class="link" href="as_expr.html#id-1_3_33_5_39_2_1_4_1_5_1-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="special">&</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> 49 <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> T<span class="special">></span> 50 <span class="keyword">typename</span> <a class="link" href="../result_of/as_expr.html" title="Struct template as_expr">proto::result_of::as_expr</a><span class="special"><</span> <span class="identifier">T</span> <span class="keyword">const</span><span class="special">,</span> <span class="identifier">Domain</span> <span class="special">></span><span class="special">::</span><span class="identifier">type</span> 51 <a class="link" href="as_expr.html#id-1_3_33_5_39_2_1_4_1_5_2-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> 52<span class="special">}</span><span class="special">;</span></pre></div> 53<div class="refsect1"> 54<a name="id-1.3.33.5.41.4.4"></a><h2>Description</h2> 55<div class="refsect2"> 56<a name="id-1.3.33.5.41.4.4.2"></a><h3> 57<a name="id-1_3_33_5_39_2_1_4_1_5-bb"></a><code class="computeroutput">as_expr</code> public member functions</h3> 58<div class="orderedlist"><ol class="orderedlist" type="1"> 59<li class="listitem"> 60<pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> T<span class="special">></span> 61 <span class="keyword">typename</span> <a class="link" href="../result_of/as_expr.html" title="Struct template as_expr">proto::result_of::as_expr</a><span class="special"><</span> <span class="identifier">T</span><span class="special">,</span> <span class="identifier">Domain</span> <span class="special">></span><span class="special">::</span><span class="identifier">type</span> 62 <a name="id-1_3_33_5_39_2_1_4_1_5_1-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="special">&</span> t<span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre> 63<p> 64 Wrap an object in a Proto terminal if it isn't a Proto expression already. 65 </p> 66<div class="variablelist"><table border="0" class="variablelist compact"> 67<colgroup> 68<col align="left" valign="top"> 69<col> 70</colgroup> 71<tbody> 72<tr> 73<td><p><span class="term">Parameters:</span></p></td> 74<td><div class="variablelist"><table border="0" class="variablelist compact"> 75<colgroup> 76<col align="left" valign="top"> 77<col> 78</colgroup> 79<tbody><tr> 80<td><p><span class="term"><code class="computeroutput">t</code></span></p></td> 81<td><p>The object to wrap. </p></td> 82</tr></tbody> 83</table></div></td> 84</tr> 85<tr> 86<td><p><span class="term">Returns:</span></p></td> 87<td><p> 88 <code class="computeroutput"><a class="link" href="../as_expr.html" title="Function as_expr">proto::as_expr</a><Domain>(t)</code> 89 </p></td> 90</tr> 91</tbody> 92</table></div> 93</li> 94<li class="listitem"> 95<pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> T<span class="special">></span> 96 <span class="keyword">typename</span> <a class="link" href="../result_of/as_expr.html" title="Struct template as_expr">proto::result_of::as_expr</a><span class="special"><</span> <span class="identifier">T</span> <span class="keyword">const</span><span class="special">,</span> <span class="identifier">Domain</span> <span class="special">></span><span class="special">::</span><span class="identifier">type</span> 97 <a name="id-1_3_33_5_39_2_1_4_1_5_2-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> 98<p>This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. </p> 99</li> 100</ol></div> 101</div> 102</div> 103</div> 104<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 105<td align="left"></td> 106<td align="right"><div class="copyright-footer">Copyright © 2008 Eric Niebler<p> 107 Distributed under the Boost Software License, Version 1.0. (See accompanying 108 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>) 109 </p> 110</div></td> 111</tr></table> 112<hr> 113<div class="spirit-nav"> 114<a accesskey="p" href="../tag/function.html"><img src="../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../../proto/reference.html#header.boost.proto.traits_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="as_expr/resu_1_3_33_5_39_2_1_4_1_4.html"><img src="../../../../../doc/src/images/next.png" alt="Next"></a> 115</div> 116</body> 117</html> 118
