Planet
navi homePPSaboutscreenshotsdownloaddevelopmentforum

source: downloads/boost_1_34_1/libs/mpl/doc/refmanual/single-view.html @ 29

Last change on this file since 29 was 29, checked in by landauf, 17 years ago

updated boost from 1_33_1 to 1_34_1
File size: 8.5 KB
Line 
1<?xml version="1.0" encoding="utf-8" ?>
2<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
3<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
4<!-- Copyright Aleksey Gurtovoy 2006. Distributed under the Boost -->
5<!-- Software License, Version 1.0. (See accompanying -->
6<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
7<head>
8<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
9<meta name="generator" content="Docutils 0.3.6: http://docutils.sourceforge.net/" />
10<title>The MPL Reference Manual: single_view</title>
11<link rel="stylesheet" href="../style.css" type="text/css" />
12</head>
13<body class="docframe refmanual">
14<table class="header"><tr class="header"><td class="header-group navigation-bar"><span class="navigation-group"><a href="./joint-view.html" class="navigation-link">Prev</a>&nbsp;<a href="./transform-view.html" class="navigation-link">Next</a></span><span class="navigation-group-separator">&nbsp;|&nbsp;</span><span class="navigation-group"><a href="./joint-view.html" class="navigation-link">Back</a>&nbsp;<a href="./transform-view.html" class="navigation-link">Along</a></span><span class="navigation-group-separator">&nbsp;|&nbsp;</span><span class="navigation-group"><a href="./views.html" class="navigation-link">Up</a>&nbsp;<a href="../refmanual.html" class="navigation-link">Home</a></span><span class="navigation-group-separator">&nbsp;|&nbsp;</span><span class="navigation-group"><a href="./refmanual_toc.html" class="navigation-link">Full TOC</a></span></td>
15<td class="header-group page-location"><a href="../refmanual.html" class="navigation-link">Front Page</a> / <a href="./sequences.html" class="navigation-link">Sequences</a> / <a href="./views.html" class="navigation-link">Views</a> / <a href="./single-view.html" class="navigation-link">single_view</a></td>
16</tr></table><div class="header-separator"></div>
17<div class="section" id="single-view">
18<h1><a class="toc-backref" href="./views.html#id349" name="single-view">single_view</a></h1>
19<div class="section" id="single-synopsis">
20<h3><a class="subsection-title" href="#synopsis" name="synopsis">Synopsis</a></h3>
21<pre class="literal-block">
22template&lt;
23      typename T
24    &gt;
25struct <a href="./single-view.html" class="identifier">single_view</a>
26{
27    // <em>unspecified</em>
28    // <em>...</em>
29};
30</pre>
31</div>
32<div class="section" id="single-description">
33<h3><a class="subsection-title" href="#description" name="description">Description</a></h3>
34<p>A view onto an arbitrary type <tt class="literal"><span class="pre">T</span></tt> as on a single-element sequence.</p>
35</div>
36<div class="section" id="single-header">
37<h3><a class="subsection-title" href="#header" name="header">Header</a></h3>
38<pre class="literal-block">
39#include &lt;<a href="../../../../boost/mpl/single_view.hpp" class="header">boost/mpl/single_view.hpp</a>&gt;
40</pre>
41</div>
42<div class="section" id="single-model-of">
43<h3><a class="subsection-title" href="#model-of" name="model-of">Model of</a></h3>
44<ul class="simple">
45<li><a class="reference" href="./random-access-sequence.html">Random Access Sequence</a></li>
46</ul>
47</div>
48<div class="section" id="single-parameters">
49<h3><a class="subsection-title" href="#parameters" name="parameters">Parameters</a></h3>
50<table border="1" class="table">
51<colgroup>
52<col width="19%" />
53<col width="23%" />
54<col width="58%" />
55</colgroup>
56<thead valign="bottom">
57<tr><th>Parameter</th>
58<th>Requirement</th>
59<th>Description</th>
60</tr>
61</thead>
62<tbody valign="top">
63<tr><td><tt class="literal"><span class="pre">T</span></tt></td>
64<td>Any type</td>
65<td>The type to be wrapped in a sequence.</td>
66</tr>
67</tbody>
68</table>
69</div>
70<div class="section" id="single-expression-semantics">
71<h3><a class="subsection-title" href="#expression-semantics" name="expression-semantics">Expression semantics</a></h3>
72<p>The semantics of an expression are defined only
73where they differ from, or are not defined in <a class="reference" href="./random-access-sequence.html">Random Access Sequence</a>.</p>
74<p>In the following table, <tt class="literal"><span class="pre">v</span></tt> is an instance of <tt class="literal"><span class="pre"><a href="./single-view.html" class="identifier">single_view</a></span></tt>, <tt class="literal"><span class="pre">x</span></tt> is an arbitrary type.</p>
75<table border="1" class="table">
76<colgroup>
77<col width="34%" />
78<col width="66%" />
79</colgroup>
80<thead valign="bottom">
81<tr><th>Expression</th>
82<th>Semantics</th>
83</tr>
84</thead>
85<tbody valign="top">
86<tr><td><pre class="first last literal-block">
87<a href="./single-view.html" class="identifier">single_view</a>&lt;x&gt;
88<a href="./single-view.html" class="identifier">single_view</a>&lt;x&gt;::type
89</pre>
90</td>
91<td>A single-element <a class="reference" href="./random-access-sequence.html">Random Access Sequence</a> <tt class="literal"><span class="pre">v</span></tt> such that
92<tt class="literal"><span class="pre"><a href="./front.html" class="identifier">front</a>&lt;v&gt;::type</span></tt> is identical to <tt class="literal"><span class="pre">x</span></tt>.</td>
93</tr>
94<tr><td><tt class="literal"><span class="pre"><a href="./size.html" class="identifier">size</a>&lt;v&gt;::type</span></tt></td>
95<td>The size of <tt class="literal"><span class="pre">v</span></tt>; <tt class="literal"><span class="pre"><a href="./size.html" class="identifier">size</a>&lt;v&gt;::value</span> <span class="pre">==</span> <span class="pre">1</span></tt>;
96see <a class="reference" href="./random-access-sequence.html">Random Access Sequence</a>.</td>
97</tr>
98</tbody>
99</table>
100</div>
101<div class="section" id="single-example">
102<h3><a class="subsection-title" href="#example" name="example">Example</a></h3>
103<pre class="literal-block">
104typedef <a href="./single-view.html" class="identifier">single_view</a>&lt;int&gt; view;
105typedef <a href="./begin.html" class="identifier">begin</a>&lt;view&gt;::type first;
106typedef <a href="./end.html" class="identifier">end</a>&lt;view&gt;::type last;
107
108<a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( is_same&lt; <a href="./deref.html" class="identifier">deref</a>&lt;first&gt;::type,int &gt; ));
109<a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( is_same&lt; <a href="./next.html" class="identifier">next</a>&lt;first&gt;::type,last &gt; ));
110<a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( is_same&lt; <a href="./prior.html" class="identifier">prior</a>&lt;last&gt;::type,first &gt; ));
111
112<a href="./assert-relation.html" class="identifier">BOOST_MPL_ASSERT_RELATION</a>( <a href="./size.html" class="identifier">size</a>&lt;view&gt;::value, ==, 1 );
113</pre>
114</div>
115<div class="section" id="single-see-also">
116<h3><a class="subsection-title" href="#see-also" name="see-also">See also</a></h3>
117<p><a class="reference" href="./sequences.html">Sequences</a>, <a class="reference" href="./views.html">Views</a>, <a class="refentry reference" href="./iterator-range.html"><tt class="refentry literal"><span class="pre">iterator_range</span></tt></a>, <a class="refentry reference" href="./filter-view.html"><tt class="refentry literal"><span class="pre">filter_view</span></tt></a>, <a class="refentry reference" href="./transform-view.html"><tt class="refentry literal"><span class="pre">transform_view</span></tt></a>, <a class="refentry reference" href="./joint-view.html"><tt class="refentry literal"><span class="pre">joint_view</span></tt></a>, <a class="refentry reference" href="./zip-view.html"><tt class="refentry literal"><span class="pre">zip_view</span></tt></a></p>
118<!-- modtime: November 13, 2004 01:12:56 +0000 -->
119<!-- Sequences/Views//transform_view -->
120</div>
121</div>
122
123<div class="footer-separator"></div>
124<table class="footer"><tr class="footer"><td class="header-group navigation-bar"><span class="navigation-group"><a href="./joint-view.html" class="navigation-link">Prev</a>&nbsp;<a href="./transform-view.html" class="navigation-link">Next</a></span><span class="navigation-group-separator">&nbsp;|&nbsp;</span><span class="navigation-group"><a href="./joint-view.html" class="navigation-link">Back</a>&nbsp;<a href="./transform-view.html" class="navigation-link">Along</a></span><span class="navigation-group-separator">&nbsp;|&nbsp;</span><span class="navigation-group"><a href="./views.html" class="navigation-link">Up</a>&nbsp;<a href="../refmanual.html" class="navigation-link">Home</a></span><span class="navigation-group-separator">&nbsp;|&nbsp;</span><span class="navigation-group"><a href="./refmanual_toc.html" class="navigation-link">Full TOC</a></span></td>
125</tr></table></body>
126</html>
Note: See TracBrowser for help on using the repository browser.