1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
|
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>Struct template impl</title>
<link rel="stylesheet" href="../../../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
<link rel="home" href="../../../index.html" title="The Boost C++ Libraries BoostBook Documentation Subset">
<link rel="up" href="../_default.html#idp381116608" title="Description">
<link rel="prev" href="../_default.html" title="Struct template _default">
<link rel="next" href="../functional/as_env.html" title="Struct as_env">
</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="../_default.html"><img src="../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../_default.html#idp381116608"><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="../functional/as_env.html"><img src="../../../../../doc/src/images/next.png" alt="Next"></a>
</div>
<div class="refentry">
<a name="boost.proto._default.impl"></a><div class="titlepage"></div>
<div class="refnamediv">
<h2><span class="refentrytitle">Struct template impl</span></h2>
<p>boost::proto::_default::impl</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.default_hpp" title="Header <boost/proto/transform/default.hpp>">boost/proto/transform/default.hpp</a>>
</span>
<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>
<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><Expr, State, Data> <span class="special">{</span>
<span class="comment">// <a class="link" href="impl.html#boost.proto._default.impltypes">types</a></span>
<span class="keyword">typedef</span> <span class="keyword">typename</span> <span class="identifier">Expr</span><span class="special">::</span><span class="identifier">tag_type</span> <a name="boost.proto._default.impl.Tag"></a><span class="identifier">Tag</span><span class="special">;</span> <span class="comment">// For exposition only</span>
<span class="keyword">typedef</span> <span class="emphasis"><em><span class="identifier">see</span><span class="special">-</span><span class="identifier">below</span></em></span> <a class="link" href="impl.html#boost.proto._default.impl.result_type"><span class="identifier">result_type</span></a><span class="special">;</span>
<span class="comment">// <a class="link" href="impl.html#idp195270208-bb">public member functions</a></span>
<span class="identifier">result_type</span> <a class="link" href="impl.html#idp195270768-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>
<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>
<span class="comment">// public data members</span>
<span class="keyword">static</span> <span class="identifier">Expr</span> <span class="identifier">s_expr</span><span class="special">;</span> <span class="comment">// For exposition only</span>
<span class="keyword">static</span> <span class="identifier">State</span> <span class="identifier">s_state</span><span class="special">;</span> <span class="comment">// For exposition only</span>
<span class="keyword">static</span> <span class="identifier">Data</span> <span class="identifier">s_data</span><span class="special">;</span> <span class="comment">// For exposition only</span>
<span class="special">}</span><span class="special">;</span></pre></div>
<div class="refsect1">
<a name="idp381174496"></a><h2>Description</h2>
<p>
Let <code class="computeroutput"><code class="computeroutput">OP</code></code> be the C++ operator
corresponding to <code class="computeroutput">Expr::proto_tag</code>. (For example, if
<code class="computeroutput">Tag</code> is <code class="computeroutput">
<a class="link" href="../tag/plus.html" title="Struct plus">proto::tag::plus</a></code>, let <code class="computeroutput">
<code class="computeroutput">OP</code></code> be <code class="computeroutput">+</code>.)
</p>
<p>
The behavior of this class is specified in terms of the C++0x <code class="computeroutput">decltype</code>
keyword. In systems where this keyword is not available, Proto uses the Boost.Typeof library to
approximate the behavior.
</p>
<div class="refsect2">
<a name="idp381182656"></a><h3>
<a name="boost.proto._default.impltypes"></a><code class="computeroutput">impl</code>
public
types</h3>
<div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem">
<p>
<span class="keyword">typedef</span> <span class="emphasis"><em><span class="identifier">see</span><span class="special">-</span><span class="identifier">below</span></em></span> <a name="boost.proto._default.impl.result_type"></a><span class="identifier">result_type</span><span class="special">;</span></p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
<p>
If <code class="computeroutput">Tag</code> corresponds to a unary prefix operator,
then the result type is
</p>
<pre class="programlisting"><span class="keyword">decltype</span><span class="special">(</span>
<span class="identifier">OP</span> <span class="identifier">Grammar</span><span class="special">(</span><span class="special">)</span><span class="special">(</span><a class="link" href="../child_idp194850880.html" title="Function child">proto::child</a><span class="special">(</span><span class="identifier">s_expr</span><span class="special">)</span><span class="special">,</span> <span class="identifier">s_state</span><span class="special">,</span> <span class="identifier">s_data</span><span class="special">)</span>
<span class="special">)</span></pre>
<p>
</p>
</li>
<li class="listitem">
<p>
If <code class="computeroutput">Tag</code> corresponds to a unary postfix operator,
then the result type is
</p>
<pre class="programlisting"><span class="keyword">decltype</span><span class="special">(</span>
<span class="identifier">Grammar</span><span class="special">(</span><span class="special">)</span><span class="special">(</span><a class="link" href="../child_idp194850880.html" title="Function child">proto::child</a><span class="special">(</span><span class="identifier">s_expr</span><span class="special">)</span><span class="special">,</span> <span class="identifier">s_state</span><span class="special">,</span> <span class="identifier">s_data</span><span class="special">)</span> <span class="identifier">OP</span>
<span class="special">)</span></pre>
<p>
</p>
</li>
<li class="listitem">
<p>
If <code class="computeroutput">Tag</code> corresponds to a binary infix operator,
then the result type is
</p>
<pre class="programlisting"><span class="keyword">decltype</span><span class="special">(</span>
<span class="identifier">Grammar</span><span class="special">(</span><span class="special">)</span><span class="special">(</span><a class="link" href="../left_idp194910704.html" title="Function left">proto::left</a><span class="special">(</span><span class="identifier">s_expr</span><span class="special">)</span><span class="special">,</span> <span class="identifier">s_state</span><span class="special">,</span> <span class="identifier">s_data</span><span class="special">)</span> <span class="identifier">OP</span>
<span class="identifier">Grammar</span><span class="special">(</span><span class="special">)</span><span class="special">(</span><a class="link" href="../right_idp194925184.html" title="Function right">proto::right</a><span class="special">(</span><span class="identifier">s_expr</span><span class="special">)</span><span class="special">,</span> <span class="identifier">s_state</span><span class="special">,</span> <span class="identifier">s_data</span><span class="special">)</span>
<span class="special">)</span></pre>
<p>
</p>
</li>
<li class="listitem">
<p>
If <code class="computeroutput">Tag</code> is <code class="computeroutput">
<a class="link" href="../tag/subscript.html" title="Struct subscript">proto::tag::subscript</a>
</code>,
then the result type is
</p>
<pre class="programlisting"><span class="keyword">decltype</span><span class="special">(</span>
<span class="identifier">Grammar</span><span class="special">(</span><span class="special">)</span><span class="special">(</span><a class="link" href="../left_idp194910704.html" title="Function left">proto::left</a><span class="special">(</span><span class="identifier">s_expr</span><span class="special">)</span><span class="special">,</span> <span class="identifier">s_state</span><span class="special">,</span> <span class="identifier">s_data</span><span class="special">)</span> <span class="special">[</span>
<span class="identifier">Grammar</span><span class="special">(</span><span class="special">)</span><span class="special">(</span><a class="link" href="../right_idp194925184.html" title="Function right">proto::right</a><span class="special">(</span><span class="identifier">s_expr</span><span class="special">)</span><span class="special">,</span> <span class="identifier">s_state</span><span class="special">,</span> <span class="identifier">s_data</span><span class="special">)</span> <span class="special">]</span>
<span class="special">)</span></pre>
<p>
</p>
</li>
<li class="listitem">
<p>
If <code class="computeroutput">Tag</code> is <code class="computeroutput">
<a class="link" href="../tag/if_else_.html" title="Struct if_else_">proto::tag::if_else_</a>
</code>,
then the result type is
</p>
<pre class="programlisting"><span class="keyword">decltype</span><span class="special">(</span>
<span class="identifier">Grammar</span><span class="special">(</span><span class="special">)</span><span class="special">(</span><a class="link" href="../child_c_idp194879248.html" title="Function child_c">proto::child_c</a><span class="special"><</span><span class="number">0</span><span class="special">></span><span class="special">(</span><span class="identifier">s_expr</span><span class="special">)</span><span class="special">,</span> <span class="identifier">s_state</span><span class="special">,</span> <span class="identifier">s_data</span><span class="special">)</span> <span class="special">?</span>
<span class="identifier">Grammar</span><span class="special">(</span><span class="special">)</span><span class="special">(</span><a class="link" href="../child_c_idp194879248.html" title="Function child_c">proto::child_c</a><span class="special"><</span><span class="number">1</span><span class="special">></span><span class="special">(</span><span class="identifier">s_expr</span><span class="special">)</span><span class="special">,</span> <span class="identifier">s_state</span><span class="special">,</span> <span class="identifier">s_data</span><span class="special">)</span> <span class="special">:</span>
<span class="identifier">Grammar</span><span class="special">(</span><span class="special">)</span><span class="special">(</span><a class="link" href="../child_c_idp194879248.html" title="Function child_c">proto::child_c</a><span class="special"><</span><span class="number">2</span><span class="special">></span><span class="special">(</span><span class="identifier">s_expr</span><span class="special">)</span><span class="special">,</span> <span class="identifier">s_state</span><span class="special">,</span> <span class="identifier">s_data</span><span class="special">)</span>
<span class="special">)</span></pre>
<p>
</p>
</li>
<li class="listitem">
<p>
If <code class="computeroutput">Tag</code> is <code class="computeroutput">
<a class="link" href="../tag/function.html" title="Struct function">proto::tag::function</a>
</code>,
then the result type is
</p>
<pre class="programlisting"><span class="keyword">decltype</span><span class="special">(</span>
<span class="identifier">Grammar</span><span class="special">(</span><span class="special">)</span><span class="special">(</span><a class="link" href="../child_c_idp194879248.html" title="Function child_c">proto::child_c</a><span class="special"><</span><span class="number">0</span><span class="special">></span><span class="special">(</span><span class="identifier">s_expr</span><span class="special">)</span><span class="special">,</span> <span class="identifier">s_state</span><span class="special">,</span> <span class="identifier">s_data</span><span class="special">)</span> <span class="special">(</span>
<span class="identifier">Grammar</span><span class="special">(</span><span class="special">)</span><span class="special">(</span><a class="link" href="../child_c_idp194879248.html" title="Function child_c">proto::child_c</a><span class="special"><</span><span class="number">1</span><span class="special">></span><span class="special">(</span><span class="identifier">s_expr</span><span class="special">)</span><span class="special">,</span> <span class="identifier">s_state</span><span class="special">,</span> <span class="identifier">s_data</span><span class="special">)</span><span class="special">,</span>
<span class="special">...</span>
<span class="identifier">Grammar</span><span class="special">(</span><span class="special">)</span><span class="special">(</span><a class="link" href="../child_c_idp194879248.html" title="Function child_c">proto::child_c</a><span class="special"><</span><span class="identifier">N</span><span class="special">></span><span class="special">(</span><span class="identifier">s_expr</span><span class="special">)</span><span class="special">,</span> <span class="identifier">s_state</span><span class="special">,</span> <span class="identifier">s_data</span><span class="special">)</span> <span class="special">)</span>
<span class="special">)</span></pre>
<p>
</p>
</li>
</ul></div>
</li></ol></div>
</div>
<div class="refsect2">
<a name="idp381325344"></a><h3>
<a name="idp195270208-bb"></a><code class="computeroutput">impl</code> public member functions</h3>
<div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem">
<pre class="literallayout"><span class="identifier">result_type</span> <a name="idp195270768-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> state<span class="special">,</span>
<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>
<code class="computeroutput">
<code class="computeroutput"><a class="link" href="../_default.html" title="Struct template _default">proto::_default</a></code><Grammar>::impl<Expr, State, Data>::operator()
</code><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
<p>
If <code class="computeroutput">Tag</code> corresponds to a unary prefix operator,
then return
</p>
<pre class="programlisting">OP Grammar()(<code class="computeroutput"><a class="link" href="../child_idp194850880.html" title="Function child">proto::child</a></code>(expr), state, data)</pre>
<p>
</p>
</li>
<li class="listitem">
<p>
If <code class="computeroutput">Tag</code> corresponds to a unary postfix operator,
then return
</p>
<pre class="programlisting">Grammar()(<code class="computeroutput"><a class="link" href="../child_idp194850880.html" title="Function child">proto::child</a></code>(expr), state, data) OP</pre>
<p>
</p>
</li>
<li class="listitem">
<p>
If <code class="computeroutput">Tag</code> corresponds to a binary infix operator,
then return
</p>
<pre class="programlisting">Grammar()(<code class="computeroutput"><a class="link" href="../left_idp194910704.html" title="Function left">proto::left</a></code>(expr), state, data) OP
Grammar()(<code class="computeroutput"><a class="link" href="../right_idp194925184.html" title="Function right">proto::right</a></code>(expr), state, data)</pre>
<p>
</p>
</li>
<li class="listitem">
<p>
If <code class="computeroutput">Tag</code> is <code class="computeroutput">
<code class="computeroutput"><a class="link" href="../tag/subscript.html" title="Struct subscript">proto::tag::subscript</a></code>
</code>,
then return
</p>
<pre class="programlisting">Grammar()(<code class="computeroutput"><a class="link" href="../left_idp194910704.html" title="Function left">proto::left</a></code>(expr), state, data) [
Grammar()(<code class="computeroutput"><a class="link" href="../right_idp194925184.html" title="Function right">proto::right</a></code>(expr), state, data) ]</pre>
<p>
</p>
</li>
<li class="listitem">
<p>
If <code class="computeroutput">Tag</code> is <code class="computeroutput">
<code class="computeroutput"><a class="link" href="../tag/if_else_.html" title="Struct if_else_">proto::tag::if_else_</a></code>
</code>,
then return
</p>
<pre class="programlisting">Grammar()(<code class="computeroutput"><a class="link" href="../child_c_idp194879248.html" title="Function child_c">proto::child_c</a></code><0>(expr), state, data) ?
Grammar()(<code class="computeroutput"><a class="link" href="../child_c_idp194879248.html" title="Function child_c">proto::child_c</a></code><1>(expr), state, data) :
Grammar()(<code class="computeroutput"><a class="link" href="../child_c_idp194879248.html" title="Function child_c">proto::child_c</a></code><2>(expr), state, data)</pre>
<p>
</p>
</li>
<li class="listitem">
<p>
If <code class="computeroutput">Tag</code> is <code class="computeroutput">
<code class="computeroutput"><a class="link" href="../tag/function.html" title="Struct function">proto::tag::function</a></code>
</code>,
then return
</p>
<pre class="programlisting">Grammar()(<code class="computeroutput"><a class="link" href="../child_c_idp194879248.html" title="Function child_c">proto::child_c</a></code><0>(expr), state, data) (
Grammar()(<code class="computeroutput"><a class="link" href="../child_c_idp194879248.html" title="Function child_c">proto::child_c</a></code><1>(expr), state, data),
...
Grammar()(<code class="computeroutput"><a class="link" href="../child_c_idp194879248.html" title="Function child_c">proto::child_c</a></code><N>(expr), state, data) )</pre>
<p>
</p>
</li>
</ul></div>
</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="../_default.html"><img src="../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../_default.html#idp381116608"><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="../functional/as_env.html"><img src="../../../../../doc/src/images/next.png" alt="Next"></a>
</div>
</body>
</html>
|
