projects / ceph.git / blame
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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 | <head> | |
| 5 | <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> | |
| 6 | <meta name="generator" content="Docutils 0.7: http://docutils.sourceforge.net/" /> | |
| 7 | <title>The MPL Reference Manual: single_view</title> | |
| 8 | <link rel="stylesheet" href="../style.css" type="text/css" /> | |
| 9 | </head> | |
| 10 | <body class="docframe refmanual"> | |
| 11 | <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> <a href="./transform-view.html" class="navigation-link">Next</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./joint-view.html" class="navigation-link">Back</a> <a href="./transform-view.html" class="navigation-link">Along</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./views.html" class="navigation-link">Up</a> <a href="../refmanual.html" class="navigation-link">Home</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./refmanual_toc.html" class="navigation-link">Full TOC</a></span></td> | |
| 12 | <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> | |
| 13 | </tr></table><div class="header-separator"></div> | |
| 14 | <div class="section" id="single-view"> | |
| 15 | <h1><a class="toc-backref" href="./views.html#id1421">single_view</a></h1> | |
| 16 | <div class="section" id="id151"> | |
| 17 | <h3><a class="subsection-title" href="#synopsis" name="synopsis">Synopsis</a></h3> | |
| 18 | <pre class="literal-block"> | |
| 19 | template< | |
| 20 | typename T | |
| 21 | > | |
| 22 | struct <a href="./single-view.html" class="identifier">single_view</a> | |
| 23 | { | |
| 24 | // <em>unspecified</em> | |
| 25 | // <em>...</em> | |
| 26 | }; | |
| 27 | </pre> | |
| 28 | </div> | |
| 29 | <div class="section" id="id152"> | |
| 30 | <h3><a class="subsection-title" href="#description" name="description">Description</a></h3> | |
| 31 | <p>A view onto an arbitrary type <tt class="literal"><span class="pre">T</span></tt> as on a single-element sequence.</p> | |
| 32 | </div> | |
| 33 | <div class="section" id="id153"> | |
| 34 | <h3><a class="subsection-title" href="#header" name="header">Header</a></h3> | |
| 35 | <pre class="literal-block"> | |
| 36 | #include <<a href="../../../../boost/mpl/single_view.hpp" class="header">boost/mpl/single_view.hpp</a>> | |
| 37 | </pre> | |
| 38 | </div> | |
| 39 | <div class="section" id="id154"> | |
| 40 | <h3><a class="subsection-title" href="#model-of" name="model-of">Model of</a></h3> | |
| 41 | <ul class="simple"> | |
| 42 | <li><a class="reference internal" href="./random-access-sequence.html">Random Access Sequence</a></li> | |
| 43 | </ul> | |
| 44 | </div> | |
| 45 | <div class="section" id="id155"> | |
| 46 | <h3><a class="subsection-title" href="#parameters" name="parameters">Parameters</a></h3> | |
| 47 | <table border="1" class="docutils table"> | |
| 48 | <colgroup> | |
| 49 | <col width="19%" /> | |
| 50 | <col width="23%" /> | |
| 51 | <col width="58%" /> | |
| 52 | </colgroup> | |
| 53 | <thead valign="bottom"> | |
| 54 | <tr><th class="head">Parameter</th> | |
| 55 | <th class="head">Requirement</th> | |
| 56 | <th class="head">Description</th> | |
| 57 | </tr> | |
| 58 | </thead> | |
| 59 | <tbody valign="top"> | |
| 60 | <tr><td><tt class="literal"><span class="pre">T</span></tt></td> | |
| 61 | <td>Any type</td> | |
| 62 | <td>The type to be wrapped in a sequence.</td> | |
| 63 | </tr> | |
| 64 | </tbody> | |
| 65 | </table> | |
| 66 | </div> | |
| 67 | <div class="section" id="id156"> | |
| 68 | <h3><a class="subsection-title" href="#expression-semantics" name="expression-semantics">Expression semantics</a></h3> | |
| 69 | <p>The semantics of an expression are defined only | |
| 70 | where they differ from, or are not defined in <a class="reference internal" href="./random-access-sequence.html">Random Access Sequence</a>.</p> | |
| 71 | <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> | |
| 72 | <table border="1" class="docutils table"> | |
| 73 | <colgroup> | |
| 74 | <col width="34%" /> | |
| 75 | <col width="66%" /> | |
| 76 | </colgroup> | |
| 77 | <thead valign="bottom"> | |
| 78 | <tr><th class="head">Expression</th> | |
| 79 | <th class="head">Semantics</th> | |
| 80 | </tr> | |
| 81 | </thead> | |
| 82 | <tbody valign="top"> | |
| 83 | <tr><td><pre class="first last literal-block"> | |
| 84 | <a href="./single-view.html" class="identifier">single_view</a><x> | |
| 85 | <a href="./single-view.html" class="identifier">single_view</a><x>::type | |
| 86 | </pre> | |
| 87 | </td> | |
| 88 | <td>A single-element <a class="reference internal" href="./random-access-sequence.html">Random Access Sequence</a> <tt class="literal"><span class="pre">v</span></tt> such that | |
| 89 | <tt class="literal"><span class="pre"><a href="./front.html" class="identifier">front</a><v>::type</span></tt> is identical to <tt class="literal"><span class="pre">x</span></tt>.</td> | |
| 90 | </tr> | |
| 91 | <tr><td><tt class="literal"><span class="pre"><a href="./size.html" class="identifier">size</a><v>::type</span></tt></td> | |
| 92 | <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><v>::value</span> <span class="pre">==</span> <span class="pre">1</span></tt>; | |
| 93 | see <a class="reference internal" href="./random-access-sequence.html">Random Access Sequence</a>.</td> | |
| 94 | </tr> | |
| 95 | </tbody> | |
| 96 | </table> | |
| 97 | </div> | |
| 98 | <div class="section" id="id157"> | |
| 99 | <h3><a class="subsection-title" href="#example" name="example">Example</a></h3> | |
| 100 | <pre class="literal-block"> | |
| 101 | typedef <a href="./single-view.html" class="identifier">single_view</a><int> view; | |
| 102 | typedef <a href="./begin.html" class="identifier">begin</a><view>::type first; | |
| 103 | typedef <a href="./end.html" class="identifier">end</a><view>::type last; | |
| 104 | ||
| 105 | <a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( is_same< <a href="./deref.html" class="identifier">deref</a><first>::type,int > )); | |
| 106 | <a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( is_same< <a href="./next.html" class="identifier">next</a><first>::type,last > )); | |
| 107 | <a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( is_same< <a href="./prior.html" class="identifier">prior</a><last>::type,first > )); | |
| 108 | ||
| 109 | <a href="./assert-relation.html" class="identifier">BOOST_MPL_ASSERT_RELATION</a>( <a href="./size.html" class="identifier">size</a><view>::value, ==, 1 ); | |
| 110 | </pre> | |
| 111 | </div> | |
| 112 | <div class="section" id="id158"> | |
| 113 | <h3><a class="subsection-title" href="#see-also" name="see-also">See also</a></h3> | |
| 114 | <p><a class="reference internal" href="./sequences.html">Sequences</a>, <a class="reference internal" href="./views.html">Views</a>, <a class="reference internal" href="./iterator-range.html">iterator_range</a>, <a class="reference internal" href="./filter-view.html">filter_view</a>, <a class="reference internal" href="./transform-view.html">transform_view</a>, <a class="reference internal" href="./joint-view.html">joint_view</a>, <a class="reference internal" href="./zip-view.html">zip_view</a></p> | |
| 115 | <!-- Sequences/Views//transform_view --> | |
| 116 | </div> | |
| 117 | </div> | |
| 118 | ||
| 119 | <div class="footer-separator"></div> | |
| 120 | <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> <a href="./transform-view.html" class="navigation-link">Next</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./joint-view.html" class="navigation-link">Back</a> <a href="./transform-view.html" class="navigation-link">Along</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./views.html" class="navigation-link">Up</a> <a href="../refmanual.html" class="navigation-link">Home</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./refmanual_toc.html" class="navigation-link">Full TOC</a></span></td> | |
| 121 | <td><div class="copyright-footer"><div class="copyright">Copyright © 2001-2009 Aleksey Gurtovoy and David Abrahams</div> | |
| 122 | Distributed under the Boost Software License, Version 1.0. (See accompanying | |
| 123 | file LICENSE_1_0.txt or copy at <a class="reference external" href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)</div></td></tr></table></body> | |
| 124 | </html> |