ceph/src/boost/libs/mpl/doc/refmanual/reverse-copy-if.html

   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: reverse_copy_if</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="./reverse-copy.html" class="navigation-link">Prev</a>&nbsp;<a href="./reverse-transform.html" class="navigation-link">Next</a></span><span class="navigation-group-separator">&nbsp;|&nbsp;</span><span class="navigation-group"><a href="./reverse-copy.html" class="navigation-link">Back</a>&nbsp;<a href="./reverse-transform.html" class="navigation-link">Along</a></span><span class="navigation-group-separator">&nbsp;|&nbsp;</span><span class="navigation-group"><a href="./transformation-algorithms.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>
  12 <td class="header-group page-location"><a href="../refmanual.html" class="navigation-link">Front Page</a> / <a href="./algorithms.html" class="navigation-link">Algorithms</a> / <a href="./transformation-algorithms.html" class="navigation-link">Transformation Algorithms</a> / <a href="./reverse-copy-if.html" class="navigation-link">reverse_copy_if</a></td>
  13 </tr></table><div class="header-separator"></div>
  14 <div class="section" id="reverse-copy-if">
  15 <h1><a class="toc-backref" href="./transformation-algorithms.html#id1499">reverse_copy_if</a></h1>
  16 <div class="section" id="id731">
  17 <h3><a class="subsection-title" href="#synopsis" name="synopsis">Synopsis</a></h3>
  18 <pre class="literal-block">
  19 template&lt;
  20       typename Sequence
  21     , typename Pred
  22     , typename In = <em>unspecified</em>
  23     &gt;
  24 struct <a href="./reverse-copy-if.html" class="identifier">reverse_copy_if</a>
  25 {
  26     typedef <em>unspecified</em> type;
  27 };
  28 </pre>
  29 </div>
  30 <div class="section" id="id732">
  31 <h3><a class="subsection-title" href="#description" name="description">Description</a></h3>
  32 <p>Returns a reversed, filtered copy of the original sequence containing the
  33 elements that satisfy the predicate <tt class="literal"><span class="pre">Pred</span></tt>.</p>
  34 <p>[<em>Note:</em> This wording applies to a no-inserter version(s) of the algorithm. See the
  35 <cite>Expression semantics</cite> subsection for a precise specification of the algorithm's
  36 details in all cases — <em>end note</em>]</p>
  37 </div>
  38 <div class="section" id="id733">
  39 <h3><a class="subsection-title" href="#header" name="header">Header</a></h3>
  40 <pre class="literal-block">
  41 #include &lt;<a href="../../../../boost/mpl/copy_if.hpp" class="header">boost/mpl/copy_if.hpp</a>&gt;
  42 </pre>
  43 </div>
  44 <div class="section" id="id734">
  45 <h3><a class="subsection-title" href="#model-of" name="model-of">Model of</a></h3>
  46 <p><a class="reference internal" href="./reversible-algorithm.html">Reversible Algorithm</a></p>
  47 </div>
  48 <div class="section" id="id735">
  49 <h3><a class="subsection-title" href="#parameters" name="parameters">Parameters</a></h3>
  50 <table border="1" class="docutils table">
  51 <colgroup>
  52 <col width="19%" />
  53 <col width="43%" />
  54 <col width="38%" />
  55 </colgroup>
  56 <thead valign="bottom">
  57 <tr><th class="head">Parameter</th>
  58 <th class="head">Requirement</th>
  59 <th class="head">Description</th>
  60 </tr>
  61 </thead>
  62 <tbody valign="top">
  63 <tr><td><tt class="literal"><span class="pre">Sequence</span></tt></td>
  64 <td><a class="reference internal" href="./forward-sequence.html">Forward Sequence</a></td>
  65 <td>A sequence to copy.</td>
  66 </tr>
  67 <tr><td><tt class="literal"><span class="pre">Pred</span></tt></td>
  68 <td>Unary <a class="reference internal" href="./lambda-expression.html">Lambda Expression</a></td>
  69 <td>A copying condition.</td>
  70 </tr>
  71 <tr><td><tt class="literal"><span class="pre">In</span></tt></td>
  72 <td><a class="reference internal" href="./inserter.html">Inserter</a></td>
  73 <td>An inserter.</td>
  74 </tr>
  75 </tbody>
  76 </table>
  77 </div>
  78 <div class="section" id="id736">
  79 <h3><a class="subsection-title" href="#expression-semantics" name="expression-semantics">Expression semantics</a></h3>
  80 <p>The semantics of an expression are defined only
  81 where they differ from, or are not defined in <a class="reference internal" href="./reversible-algorithm.html">Reversible Algorithm</a>.</p>
  82 <p>For any <a class="reference internal" href="./forward-sequence.html">Forward Sequence</a> <tt class="literal"><span class="pre">s</span></tt>, an unary <a class="reference internal" href="./lambda-expression.html">Lambda Expression</a> <tt class="literal"><span class="pre">pred</span></tt>, and
  83 an <a class="reference internal" href="./inserter.html">Inserter</a> <tt class="literal"><span class="pre">in</span></tt>:</p>
  84 <pre class="literal-block">
  85 typedef <a href="./reverse-copy-if.html" class="identifier">reverse_copy_if</a>&lt;s,pred,in&gt;::type r;
  86 </pre>
  87 <table class="docutils field-list" frame="void" rules="none">
  88 <col class="field-name" />
  89 <col class="field-body" />
  90 <tbody valign="top">
  91 <tr class="field"><th class="field-name">Return type:</th><td class="field-body"><p class="first">A type</p>
  92 </td>
  93 </tr>
  94 <tr class="field"><th class="field-name">Semantics:</th><td class="field-body"><p class="first">Equivalent to</p>
  95 <pre class="last literal-block">
  96 typedef <a href="./lambda.html" class="identifier">lambda</a>&lt;pred&gt;::type p;
  97 typedef <a href="./lambda.html" class="identifier">lambda</a>&lt;in::operation&gt;::type op;
  98
  99 typedef <a href="./reverse-fold.html" class="identifier">reverse_fold</a>&lt;
 100       s
 101     , in::state
 102     , <a href="./eval-if.html" class="identifier">eval_if</a>&lt;
 103           <a href="./apply-wrap.html" class="identifier">apply_wrap</a><tt class="literal"><span class="pre">1</span></tt>&lt;p,<a href="./placeholders.html" class="identifier">_2</a>&gt;
 104         , <a href="./apply-wrap.html" class="identifier">apply_wrap</a><tt class="literal"><span class="pre">2</span></tt>&lt;op,<a href="./placeholders.html" class="identifier">_1</a>,<a href="./placeholders.html" class="identifier">_2</a>&gt;
 105         , <a href="./identity.html" class="identifier">identity</a>&lt;<a href="./placeholders.html" class="identifier">_1</a>&gt;
 106         &gt;
 107     &gt;::type r;
 108 </pre>
 109 </td>
 110 </tr>
 111 </tbody>
 112 </table>
 113 </div>
 114 <div class="section" id="id737">
 115 <h3><a class="subsection-title" href="#complexity" name="complexity">Complexity</a></h3>
 116 <p>Linear. Exactly <tt class="literal"><span class="pre"><a href="./size.html" class="identifier">size</a>&lt;s&gt;::value</span></tt> applications of <tt class="literal"><span class="pre">pred</span></tt>, and at
 117 most <tt class="literal"><span class="pre"><a href="./size.html" class="identifier">size</a>&lt;s&gt;::value</span></tt> applications of <tt class="literal"><span class="pre">in::operation</span></tt>.</p>
 118 </div>
 119 <div class="section" id="id738">
 120 <h3><a class="subsection-title" href="#example" name="example">Example</a></h3>
 121 <pre class="literal-block">
 122 typedef <a href="./reverse-copy-if.html" class="identifier">reverse_copy_if</a>&lt;
 123       <a href="./range-c.html" class="identifier">range_c</a>&lt;int,0,10&gt;
 124     , <a href="./less.html" class="identifier">less</a>&lt; <a href="./placeholders.html" class="identifier">_1</a>, <a href="./int.html" class="identifier">int_</a>&lt;5&gt; &gt;
 125     , <a href="./front-inserter.html" class="identifier">front_inserter</a>&lt; <a href="./vector.html" class="identifier">vector</a>&lt;&gt; &gt;
 126     &gt;::type result;
 127
 128 <a href="./assert-relation.html" class="identifier">BOOST_MPL_ASSERT_RELATION</a>( <a href="./size.html" class="identifier">size</a>&lt;result&gt;::value, ==, 5 );
 129 <a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( <a href="./equal.html" class="identifier">equal</a>&lt;result,<a href="./range-c.html" class="identifier">range_c</a>&lt;int,0,5&gt; > ));
 130 </pre>
 131 </div>
 132 <div class="section" id="id739">
 133 <h3><a class="subsection-title" href="#see-also" name="see-also">See also</a></h3>
 134 <p><a class="reference internal" href="./transformation-algorithms.html">Transformation Algorithms</a>, <a class="reference internal" href="./reversible-algorithm.html">Reversible Algorithm</a>, <a class="reference internal" href="./copy-if.html">copy_if</a>, <a class="reference internal" href="./reverse-copy.html">reverse_copy</a>, <a class="reference internal" href="./remove-if.html">remove_if</a>, <a class="reference internal" href="./replace-if.html">replace_if</a></p>
 135 <!-- Algorithms/Transformation Algorithms//reverse_transform |130 -->
 136 </div>
 137 </div>
 138
 139 <div class="footer-separator"></div>
 140 <table class="footer"><tr class="footer"><td class="header-group navigation-bar"><span class="navigation-group"><a href="./reverse-copy.html" class="navigation-link">Prev</a>&nbsp;<a href="./reverse-transform.html" class="navigation-link">Next</a></span><span class="navigation-group-separator">&nbsp;|&nbsp;</span><span class="navigation-group"><a href="./reverse-copy.html" class="navigation-link">Back</a>&nbsp;<a href="./reverse-transform.html" class="navigation-link">Along</a></span><span class="navigation-group-separator">&nbsp;|&nbsp;</span><span class="navigation-group"><a href="./transformation-algorithms.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>
 141 <td><div class="copyright-footer"><div class="copyright">Copyright ©  2001-2009 Aleksey Gurtovoy and David Abrahams</div>
 142 Distributed under the Boost Software License, Version 1.0. (See accompanying
 143 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>
 144 </html>