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 impl</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="../_expr.html#id-1.3.33.5.43.4.4" title="Description"> 10<link rel="prev" href="../_expr.html" title="Struct _expr"> 11<link rel="next" href="../_state.html" title="Struct _state"> 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 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class="refentrytitle">Struct template impl</span></h2> 30<p>boost::proto::_expr::impl</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="../../../proto/reference.html#header.boost.proto.transform.arg_hpp" title="Header <boost/proto/transform/arg.hpp>">boost/proto/transform/arg.hpp</a>> 34 35</span> 36<span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> <a class="link" href="../../../Expr.html" title="Concept Expr">Expr</a><span class="special">,</span> <span class="keyword">typename</span> State<span class="special">,</span> <span class="keyword">typename</span> Data<span class="special">></span> 37<span class="keyword">struct</span> <a class="link" href="impl.html" title="Struct template impl">impl</a> <span class="special">:</span> <span class="keyword"></span> <a class="link" href="../transform_impl.html" title="Struct template transform_impl">proto::transform_impl</a><span class="special"><</span> <span class="identifier">Expr</span><span class="special">,</span> <span class="identifier">State</span><span class="special">,</span> <span class="identifier">Data</span> <span class="special">></span> <span class="special">{</span> 38 <span class="comment">// types</span> 39 <span class="keyword">typedef</span> <span class="identifier">Expr</span> <a name="boost.proto._expr.impl.result_type"></a><span class="identifier">result_type</span><span class="special">;</span> 40 41 <span class="comment">// <a class="link" href="impl.html#id-1_3_33_5_41_2_1_1_4_4-bb">public member functions</a></span> 42 <span class="identifier">Expr</span> <a class="link" href="impl.html#id-1_3_33_5_41_2_1_1_4_4_1-bb"><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span></a><span class="special">(</span><span class="keyword">typename</span> <span class="identifier">impl</span><span class="special">::</span><span class="identifier">expr_param</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">impl</span><span class="special">::</span><span class="identifier">state_param</span><span class="special">,</span> 43 <span class="keyword">typename</span> <span class="identifier">impl</span><span class="special">::</span><span class="identifier">data_param</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> 44<span class="special">}</span><span class="special">;</span></pre></div> 45<div class="refsect1"> 46<a name="id-1.3.33.5.43.4.4.3.4"></a><h2>Description</h2> 47<div class="refsect2"> 48<a name="id-1.3.33.5.43.4.4.3.4.2"></a><h3> 49<a name="id-1_3_33_5_41_2_1_1_4_4-bb"></a><code class="computeroutput">impl</code> public member functions</h3> 50<div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem"> 51<pre class="literallayout"><span class="identifier">Expr</span> <a name="id-1_3_33_5_41_2_1_1_4_4_1-bb"></a><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span><span class="special">(</span><span class="keyword">typename</span> <span class="identifier">impl</span><span class="special">::</span><span class="identifier">expr_param</span> expr<span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">impl</span><span class="special">::</span><span class="identifier">state_param</span><span class="special">,</span> 52 <span class="keyword">typename</span> <span class="identifier">impl</span><span class="special">::</span><span class="identifier">data_param</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre> 53<p> 54 Returns the current expression. 55 </p> 56<div class="variablelist"><table border="0" class="variablelist compact"> 57<colgroup> 58<col align="left" valign="top"> 59<col> 60</colgroup> 61<tbody> 62<tr> 63<td><p><span class="term">Parameters:</span></p></td> 64<td><div class="variablelist"><table border="0" class="variablelist compact"> 65<colgroup> 66<col align="left" valign="top"> 67<col> 68</colgroup> 69<tbody><tr> 70<td><p><span class="term"><code class="computeroutput">expr</code></span></p></td> 71<td><p>The current expression. </p></td> 72</tr></tbody> 73</table></div></td> 74</tr> 75<tr> 76<td><p><span class="term">Returns:</span></p></td> 77<td><p> 78 <code class="computeroutput">expr</code> 79 </p></td> 80</tr> 81<tr> 82<td><p><span class="term">Throws:</span></p></td> 83<td>Will not throw.</td> 84</tr> 85</tbody> 86</table></div> 87</li></ol></div> 88</div> 89</div> 90</div> 91<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 92<td align="left"></td> 93<td align="right"><div class="copyright-footer">Copyright © 2008 Eric Niebler<p> 94 Distributed under the Boost Software License, Version 1.0. (See accompanying 95 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>) 96 </p> 97</div></td> 98</tr></table> 99<hr> 100<div class="spirit-nav"> 101<a accesskey="p" href="../_expr.html"><img src="../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../_expr.html#id-1.3.33.5.43.4.4"><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="../_state.html"><img src="../../../../../doc/src/images/next.png" alt="Next"></a> 102</div> 103</body> 104</html> 105
