doc/html/boost/proto/call/impl.html

   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=US-ASCII">
   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="../call.html#idp480086192" title="Description">
  10 <link rel="prev" href="../call.html" title="Struct template call">
  11 <link rel="next" href="../_default.html" title="Struct template _default">
  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="../call.html"><img src="../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../call.html#idp480086192"><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="../_default.html"><img src="../../../../../doc/src/images/next.png" alt="Next"></a>
  25 </div>
  26 <div class="refentry">
  27 <a name="boost.proto.call.impl"></a><div class="titlepage"></div>
  28 <div class="refnamediv">
  29 <h2><span class="refentrytitle">Struct template impl</span></h2>
  30 <p>boost::proto::call::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: &lt;<a class="link" href="../../../proto/reference.html#header.boost.proto.transform.call_hpp" title="Header &lt;boost/proto/transform/call.hpp&gt;">boost/proto/transform/call.hpp</a>&gt;
  34
  35 </span>
  36 <span class="keyword">template</span><span class="special">&lt;</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">&gt;</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>&lt;Expr, State, Data&gt; <span class="special">{</span>
  38   <span class="comment">// <a class="link" href="impl.html#boost.proto.call.impltypes">types</a></span>
  39   <span class="keyword">typedef</span> <em class="replaceable"><code><span class="identifier">see</span><span class="special">-</span><span class="identifier">below</span></code></em> <a class="link" href="impl.html#boost.proto.call.impl.result_type"><span class="identifier">result_type</span></a><span class="special">;</span>
  40
  41   <span class="comment">// <a class="link" href="impl.html#idp704795584-bb">public member functions</a></span>
  42   <span class="identifier">result_type</span> <a class="link" href="impl.html#idp704796144-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>
  43                          <span class="keyword">typename</span> <span class="identifier">impl</span><span class="special">::</span><span class="identifier">state_param</span><span class="special">,</span>
  44                          <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>
  45 <span class="special">}</span><span class="special">;</span></pre></div>
  46 <div class="refsect1">
  47 <a name="idp480130288"></a><h2>Description</h2>
  48 <div class="refsect2">
  49 <a name="idp480130704"></a><h3>
  50 <a name="boost.proto.call.impltypes"></a><code class="computeroutput">impl</code>
  51         public
  52        types</h3>
  53 <div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem">
  54 <p>
  55 <span class="keyword">typedef</span> <em class="replaceable"><code><span class="identifier">see</span><span class="special">-</span><span class="identifier">below</span></code></em> <a name="boost.proto.call.impl.result_type"></a><span class="identifier">result_type</span><span class="special">;</span></p>
  56 <p>
  57                 In the description that follows, a type <code class="computeroutput">T</code> is determined to model the
  58                 <a class="link" href="../../../PrimitiveTransform.html" title="Concept PrimitiveTransform">PrimitiveTransform</a> concept if
  59                 <code class="computeroutput"><a class="link" href="../is_transform.html" title="Struct template is_transform">proto::is_transform</a>&lt;T&gt;::value</code> is
  60                 <code class="computeroutput">true</code>.
  61               </p>
  62 <p>
  63                 <code class="computeroutput"><a class="link" href="../call.html" title="Struct template call">proto::call</a>&lt;T&gt;::impl&lt;Expr,State,Data&gt;::result_type</code>
  64                 is computed as follows:
  65                 </p>
  66 <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
  67 <li class="listitem">
  68 <p>
  69                       If <code class="computeroutput">T</code> if of the form
  70                       <code class="computeroutput"><a class="link" href="../../../PrimitiveTransform.html" title="Concept PrimitiveTransform">PrimitiveTransform</a></code> or
  71                       <code class="computeroutput"><a class="link" href="../../../PrimitiveTransform.html" title="Concept PrimitiveTransform">PrimitiveTransform</a>()</code>, then
  72                       <code class="computeroutput">result_type</code> is:
  73                       </p>
  74 <pre class="programlisting"><span class="keyword">typename</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">result_of</span><span class="special">&lt;</span><span class="identifier">PrimitiveTransform</span><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">&gt;</span><span class="special">::</span><span class="identifier">type</span></pre>
  75 <p>
  76                     </p>
  77 </li>
  78 <li class="listitem">
  79 <p>
  80                       If <code class="computeroutput">T</code> is of the form
  81                       <code class="computeroutput"><a class="link" href="../../../PrimitiveTransform.html" title="Concept PrimitiveTransform">PrimitiveTransform</a>(A<sub>0</sub>)</code>, then
  82                       <code class="computeroutput">result_type</code> is:
  83                       </p>
  84 <pre class="programlisting"><span class="keyword">typename</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">result_of</span><span class="special">&lt;</span><span class="identifier">PrimitiveTransform</span><span class="special">(</span>
  85   <span class="keyword">typename</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">result_of</span><span class="special">&lt;</span><a class="link" href="../when.html" title="Struct template when">when</a><span class="special">&lt;</span><a class="link" href="../_.html" title="Struct _">_</a><span class="special">,</span><span class="identifier">A</span><sub><span class="number">0</span></sub><span class="special">&gt;</span><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">&gt;</span><span class="special">::</span><span class="identifier">type</span><span class="special">,</span>
  86   <span class="identifier">State</span><span class="special">,</span>
  87   <span class="identifier">Data</span>
  88 <span class="special">)</span><span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span></pre>
  89 <p>
  90                     </p>
  91 </li>
  92 <li class="listitem">
  93 <p>
  94                       If <code class="computeroutput">T</code> is of the form
  95                       <code class="computeroutput"><a class="link" href="../../../PrimitiveTransform.html" title="Concept PrimitiveTransform">PrimitiveTransform</a>(A<sub>0</sub>, A<sub>1</sub>)</code>, then
  96                       <code class="computeroutput">result_type</code> is:
  97                       </p>
  98 <pre class="programlisting"><span class="keyword">typename</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">result_of</span><span class="special">&lt;</span><span class="identifier">PrimitiveTransform</span><span class="special">(</span>
  99   <span class="keyword">typename</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">result_of</span><span class="special">&lt;</span><a class="link" href="../when.html" title="Struct template when">when</a><span class="special">&lt;</span><a class="link" href="../_.html" title="Struct _">_</a><span class="special">,</span><span class="identifier">A</span><sub><span class="number">0</span></sub><span class="special">&gt;</span><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">&gt;</span><span class="special">::</span><span class="identifier">type</span><span class="special">,</span>
 100   <span class="keyword">typename</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">result_of</span><span class="special">&lt;</span><a class="link" href="../when.html" title="Struct template when">when</a><span class="special">&lt;</span><a class="link" href="../_.html" title="Struct _">_</a><span class="special">,</span><span class="identifier">A</span><sub><span class="number">1</span></sub><span class="special">&gt;</span><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">&gt;</span><span class="special">::</span><span class="identifier">type</span><span class="special">,</span>
 101   <span class="identifier">Data</span>
 102 <span class="special">)</span><span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span></pre>
 103 <p>
 104                     </p>
 105 </li>
 106 <li class="listitem">
 107 <p>
 108                       If <code class="computeroutput">T</code> is of the form
 109                       <code class="computeroutput"><a class="link" href="../../../PrimitiveTransform.html" title="Concept PrimitiveTransform">PrimitiveTransform</a>(A<sub>0</sub>, A<sub>1</sub>, A<sub>2</sub>)</code>, then
 110                       <code class="computeroutput">result_type</code> is:
 111                       </p>
 112 <pre class="programlisting"><span class="keyword">typename</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">result_of</span><span class="special">&lt;</span><span class="identifier">PrimitiveTransform</span><span class="special">(</span>
 113   <span class="keyword">typename</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">result_of</span><span class="special">&lt;</span><a class="link" href="../when.html" title="Struct template when">when</a><span class="special">&lt;</span><a class="link" href="../_.html" title="Struct _">_</a><span class="special">,</span><span class="identifier">A</span><sub><span class="number">0</span></sub><span class="special">&gt;</span><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">&gt;</span><span class="special">::</span><span class="identifier">type</span><span class="special">,</span>
 114   <span class="keyword">typename</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">result_of</span><span class="special">&lt;</span><a class="link" href="../when.html" title="Struct template when">when</a><span class="special">&lt;</span><a class="link" href="../_.html" title="Struct _">_</a><span class="special">,</span><span class="identifier">A</span><sub><span class="number">1</span></sub><span class="special">&gt;</span><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">&gt;</span><span class="special">::</span><span class="identifier">type</span><span class="special">,</span>
 115   <span class="keyword">typename</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">result_of</span><span class="special">&lt;</span><a class="link" href="../when.html" title="Struct template when">when</a><span class="special">&lt;</span><a class="link" href="../_.html" title="Struct _">_</a><span class="special">,</span><span class="identifier">A</span><sub><span class="number">2</span></sub><span class="special">&gt;</span><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">&gt;</span><span class="special">::</span><span class="identifier">type</span>
 116 <span class="special">)</span><span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span></pre>
 117 <p>
 118                     </p>
 119 </li>
 120 <li class="listitem">
 121 <p>
 122                       If <code class="computeroutput">T</code> is of the form
 123                       <code class="computeroutput"><a class="link" href="../../../PolymorphicFunctionObject.html" title="Concept PolymorphicFunctionObject">PolymorphicFunctionObject</a>(A<sub>0</sub>,&#8230;A<sub>n</sub>)</code>, then
 124                       <code class="computeroutput">result_type</code> is:
 125                       </p>
 126 <pre class="programlisting"><span class="keyword">typename</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">result_of</span><span class="special">&lt;</span><span class="identifier">PolymorphicFunctionObject</span><span class="special">(</span>
 127   <span class="keyword">typename</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">result_of</span><span class="special">&lt;</span><a class="link" href="../when.html" title="Struct template when">when</a><span class="special">&lt;</span><a class="link" href="../_.html" title="Struct _">_</a><span class="special">,</span><span class="identifier">A</span><sub><span class="number">0</span></sub><span class="special">&gt;</span><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">&gt;</span><span class="special">::</span><span class="identifier">type</span><span class="special">,</span>
 128   &#8230;
 129   <span class="keyword">typename</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">result_of</span><span class="special">&lt;</span><a class="link" href="../when.html" title="Struct template when">when</a><span class="special">&lt;</span><a class="link" href="../_.html" title="Struct _">_</a><span class="special">,</span><span class="identifier">A</span><sub><span class="identifier">n</span></sub><span class="special">&gt;</span><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">&gt;</span><span class="special">::</span><span class="identifier">type</span>
 130 <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span></pre>
 131 <p>
 132                     </p>
 133 </li>
 134 <li class="listitem">
 135 <p>
 136                       If <code class="computeroutput">T</code> is of the form
 137                       <code class="computeroutput"><a class="link" href="../../../PolymorphicFunctionObject.html" title="Concept PolymorphicFunctionObject">PolymorphicFunctionObject</a>(A<sub>0</sub>,&#8230;A<sub>n</sub> ...)</code>, then
 138                       let <code class="computeroutput">T'</code> be <code class="computeroutput"><a class="link" href="../../../PolymorphicFunctionObject.html" title="Concept PolymorphicFunctionObject">PolymorphicFunctionObject</a>(A<sub>0</sub>,&#8230;A<sub>n-1</sub>, <em class="replaceable"><code>S</code></em>)</code>,
 139                       where <em class="replaceable"><code>S</code></em> is a type sequence computed from the unpacking expression <code class="computeroutput">A<sub>n</sub></code>
 140                       as described in the reference for <code class="computeroutput"><a class="link" href="../pack.html" title="Struct pack">proto::pack</a></code>.
 141                       Then, <code class="computeroutput">result_type</code> is:
 142                       </p>
 143 <pre class="programlisting"><code class="computeroutput"><span class="keyword">typename</span> <a class="link" href="../call.html" title="Struct template call">proto::call</a><span class="special">&lt;</span><span class="identifier">T</span><span class="char">'&gt;::impl&lt;Expr,State,Data&gt;::result_type</span></code></pre>
 144 <p>
 145                     </p>
 146 </li>
 147 </ul></div>
 148 <p>
 149               </p>
 150 </li></ol></div>
 151 </div>
 152 <div class="refsect2">
 153 <a name="idp480326576"></a><h3>
 154 <a name="idp704795584-bb"></a><code class="computeroutput">impl</code> public member functions</h3>
 155 <div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem">
 156 <pre class="literallayout"><span class="identifier">result_type</span> <a name="idp704796144-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>
 157                        <span class="keyword">typename</span> <span class="identifier">impl</span><span class="special">::</span><span class="identifier">state_param</span> state<span class="special">,</span>
 158                        <span class="keyword">typename</span> <span class="identifier">impl</span><span class="special">::</span><span class="identifier">data_param</span> data<span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
 159 <p>
 160                   In the description that follows, a type <code class="computeroutput">T</code> is determined to model the
 161                   <a class="link" href="../../../PrimitiveTransform.html" title="Concept PrimitiveTransform">PrimitiveTransform</a> concept if
 162                   <code class="computeroutput"><code class="computeroutput"><a class="link" href="../is_transform.html" title="Struct template is_transform">proto::is_transform</a></code>&lt;T&gt;::value</code> is
 163                   <code class="computeroutput">true</code>.
 164                 </p>
 165 <p>
 166                   <code class="computeroutput"><code class="computeroutput"><a class="link" href="../call.html" title="Struct template call">proto::call</a></code>&lt;T&gt;::impl&lt;Expr,State,Data&gt;::operator()</code> behaves as follows:
 167                   </p>
 168 <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
 169 <li class="listitem">
 170 <p>
 171                         If <code class="computeroutput">T</code> if of the form
 172                         <code class="computeroutput"><a class="link" href="../../../PrimitiveTransform.html" title="Concept PrimitiveTransform">PrimitiveTransform</a></code> or
 173                         <code class="computeroutput"><a class="link" href="../../../PrimitiveTransform.html" title="Concept PrimitiveTransform">PrimitiveTransform</a>()</code>, then
 174                         return
 175                         </p>
 176 <pre class="programlisting">PrimitiveTransform()(expr, state, data)</pre>
 177 <p>
 178                       </p>
 179 </li>
 180 <li class="listitem">
 181 <p>
 182                         If <code class="computeroutput">T</code> is of the form
 183                         <code class="computeroutput"><a class="link" href="../../../PrimitiveTransform.html" title="Concept PrimitiveTransform">PrimitiveTransform</a>(A<sub>0</sub>)</code>, then
 184                         return
 185                         </p>
 186 <pre class="programlisting">PrimitiveTransform()(
 187   <code class="computeroutput"><a class="link" href="../when.html" title="Struct template when">when</a></code>&lt;<code class="computeroutput"><a class="link" href="../_.html" title="Struct _">_</a></code>,A<sub>0</sub>&gt;()(expr, state, data),
 188   state,
 189   sata
 190 )</pre>
 191 <p>
 192                       </p>
 193 </li>
 194 <li class="listitem">
 195 <p>
 196                         If <code class="computeroutput">T</code> is of the form
 197                         <code class="computeroutput"><a class="link" href="../../../PrimitiveTransform.html" title="Concept PrimitiveTransform">PrimitiveTransform</a>(A<sub>0</sub>, A<sub>1</sub>)</code>, then
 198                         return:
 199                         </p>
 200 <pre class="programlisting">PrimitiveTransform()(
 201   <code class="computeroutput"><a class="link" href="../when.html" title="Struct template when">when</a></code>&lt;<code class="computeroutput"><a class="link" href="../_.html" title="Struct _">_</a></code>,A<sub>0</sub>&gt;()(expr, state, data),
 202   <code class="computeroutput"><a class="link" href="../when.html" title="Struct template when">when</a></code>&lt;<code class="computeroutput"><a class="link" href="../_.html" title="Struct _">_</a></code>,A<sub>1</sub>&gt;()(expr, state, data),
 203   Data
 204 )</pre>
 205 <p>
 206                       </p>
 207 </li>
 208 <li class="listitem">
 209 <p>
 210                         If <code class="computeroutput">T</code> is of the form
 211                         <code class="computeroutput"><a class="link" href="../../../PrimitiveTransform.html" title="Concept PrimitiveTransform">PrimitiveTransform</a>(A<sub>0</sub>, A<sub>1</sub>, A<sub>2</sub>)</code>, then
 212                         return
 213                         </p>
 214 <pre class="programlisting">PrimitiveTransform()(
 215   <code class="computeroutput"><a class="link" href="../when.html" title="Struct template when">when</a></code>&lt;<code class="computeroutput"><a class="link" href="../_.html" title="Struct _">_</a></code>,A<sub>0</sub>&gt;()(expr, state, data),
 216   <code class="computeroutput"><a class="link" href="../when.html" title="Struct template when">when</a></code>&lt;<code class="computeroutput"><a class="link" href="../_.html" title="Struct _">_</a></code>,A<sub>1</sub>&gt;()(expr, state, data),
 217   <code class="computeroutput"><a class="link" href="../when.html" title="Struct template when">when</a></code>&lt;<code class="computeroutput"><a class="link" href="../_.html" title="Struct _">_</a></code>,A<sub>2</sub>&gt;()(expr, state, data)
 218 )</pre>
 219 <p>
 220                       </p>
 221 </li>
 222 <li class="listitem">
 223 <p>
 224                         If <code class="computeroutput">T</code> is of the form
 225                         <code class="computeroutput"><a class="link" href="../../../PolymorphicFunctionObject.html" title="Concept PolymorphicFunctionObject">PolymorphicFunctionObject</a>(A<sub>0</sub>,&#8230;A<sub>n</sub>)</code>, then
 226                         return:
 227                         </p>
 228 <pre class="programlisting">PolymorphicFunctionObject()(
 229   <code class="computeroutput"><a class="link" href="../when.html" title="Struct template when">when</a></code>&lt;<code class="computeroutput"><a class="link" href="../_.html" title="Struct _">_</a></code>,A<sub>0</sub>&gt;()(expr, state, data),
 230   ...
 231   <code class="computeroutput"><a class="link" href="../when.html" title="Struct template when">when</a></code>&lt;<code class="computeroutput"><a class="link" href="../_.html" title="Struct _">_</a></code>,A<sub>n</sub>&gt;()(expr, state, data)
 232 )</pre>
 233 <p>
 234                       </p>
 235 </li>
 236 <li class="listitem">
 237 <p>
 238                       If <code class="computeroutput">T</code> is of the form
 239                       <code class="computeroutput"><a class="link" href="../../../PolymorphicFunctionObject.html" title="Concept PolymorphicFunctionObject">PolymorphicFunctionObject</a>(A<sub>0</sub>,&#8230;A<sub>n</sub> ...)</code>, then
 240                       let <code class="computeroutput">T'</code> be <code class="computeroutput"><a class="link" href="../../../PolymorphicFunctionObject.html" title="Concept PolymorphicFunctionObject">PolymorphicFunctionObject</a>(A<sub>0</sub>,&#8230;A<sub>n-1</sub>, <em class="replaceable"><code>S</code></em>)</code>,
 241                       where <em class="replaceable"><code>S</code></em> is a type sequence computed from the unpacking expression <code class="computeroutput">A<sub>n</sub></code>
 242                       as described in the reference for <code class="computeroutput"><code class="computeroutput"><a class="link" href="../pack.html" title="Struct pack">proto::pack</a></code></code>.
 243                       Then, return:
 244                       </p>
 245 <pre class="programlisting"><code class="computeroutput"><code class="computeroutput"><a class="link" href="../call.html" title="Struct template call">proto::call</a></code>&lt;T'&gt;()(expr, state, data)</code></pre>
 246 <p>
 247                     </p>
 248 </li>
 249 </ul></div>
 250 <p>
 251                 </p>
 252 </li></ol></div>
 253 </div>
 254 </div>
 255 </div>
 256 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
 257 <td align="left"></td>
 258 <td align="right"><div class="copyright-footer">Copyright &#169; 2008 Eric Niebler<p>
 259         Distributed under the Boost Software License, Version 1.0. (See accompanying
 260         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>)
 261       </p>
 262 </div></td>
 263 </tr></table>
 264 <hr>
 265 <div class="spirit-nav">
 266 <a accesskey="p" href="../call.html"><img src="../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../call.html#idp480086192"><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="../_default.html"><img src="../../../../../doc/src/images/next.png" alt="Next"></a>
 267 </div>
 268 </body>
 269 </html>