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

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  14 <div class="section" id="reverse-transform">
  15 <h1><a class="toc-backref" href="./transformation-algorithms.html#id1500">reverse_transform</a></h1>
  16 <div class="section" id="id740">
  17 <h3><a class="subsection-title" href="#synopsis" name="synopsis">Synopsis</a></h3>
  18 <pre class="literal-block">
  19 template&lt;
  20       typename Seq
  21     , typename Op
  22     , typename In = <em>unspecified</em>
  23     &gt;
  24 struct <a href="./reverse-transform.html" class="identifier">reverse_transform</a>
  25 {
  26     typedef <em>unspecified</em> type;
  27 };
  28
  29 template&lt;
  30       typename Seq1
  31     , typename Seq2
  32     , typename BinaryOp
  33     , typename In = <em>unspecified</em>
  34     &gt;
  35 struct <a href="./reverse-transform.html" class="identifier">reverse_transform</a>
  36 {
  37     typedef <em>unspecified</em> type;
  38 };
  39 </pre>
  40 </div>
  41 <div class="section" id="id741">
  42 <h3><a class="subsection-title" href="#description" name="description">Description</a></h3>
  43 <p><tt class="literal"><span class="pre"><a href="./reverse-transform.html" class="identifier">reverse_transform</a></span></tt> is an <a class="reference internal" href="./terminology.html#overloaded-name">overloaded name</a>:</p>
  44 <ul class="simple">
  45 <li><tt class="literal"><span class="pre"><a href="./reverse-transform.html" class="identifier">reverse_transform</a>&lt;Seq,Op&gt;</span></tt> returns a reversed, transformed copy of the
  46 original sequence produced by applying an unary transformation <tt class="literal"><span class="pre">Op</span></tt> to
  47 every element in the [<tt class="literal"><span class="pre"><a href="./begin.html" class="identifier">begin</a>&lt;Sequence&gt;::type</span></tt>, <tt class="literal"><span class="pre"><a href="./end.html" class="identifier">end</a>&lt;Sequence&gt;::type</span></tt>) range.</li>
  48 <li><tt class="literal"><span class="pre"><a href="./reverse-transform.html" class="identifier">reverse_transform</a>&lt;Seq1,Seq2,Op&gt;</span></tt> returns a new sequence produced by applying a
  49 binary transformation <tt class="literal"><span class="pre">BinaryOp</span></tt> to a pair of elements (e<sub>1</sub>, e2<sub>1</sub>)
  50 from the corresponding [<tt class="literal"><span class="pre"><a href="./begin.html" class="identifier">begin</a>&lt;Seq1&gt;::type</span></tt>, <tt class="literal"><span class="pre"><a href="./end.html" class="identifier">end</a>&lt;Seq1&gt;::type</span></tt>) and [<tt class="literal"><span class="pre"><a href="./begin.html" class="identifier">begin</a>&lt;Seq2&gt;::type</span></tt>, <tt class="literal"><span class="pre"><a href="./end.html" class="identifier">end</a>&lt;Seq2&gt;::type</span></tt>) ranges in reverse
  51 order.</li>
  52 </ul>
  53 <p>[<em>Note:</em> This wording applies to a no-inserter version(s) of the algorithm. See the
  54 <cite>Expression semantics</cite> subsection for a precise specification of the algorithm's
  55 details in all cases — <em>end note</em>]</p>
  56 </div>
  57 <div class="section" id="id742">
  58 <h3><a class="subsection-title" href="#header" name="header">Header</a></h3>
  59 <pre class="literal-block">
  60 #include &lt;<a href="../../../../boost/mpl/transform.hpp" class="header">boost/mpl/transform.hpp</a>&gt;
  61 </pre>
  62 </div>
  63 <div class="section" id="id743">
  64 <h3><a class="subsection-title" href="#model-of" name="model-of">Model of</a></h3>
  65 <p><a class="reference internal" href="./reversible-algorithm.html">Reversible Algorithm</a></p>
  66 </div>
  67 <div class="section" id="id744">
  68 <h3><a class="subsection-title" href="#parameters" name="parameters">Parameters</a></h3>
  69 <table border="1" class="docutils table">
  70 <colgroup>
  71 <col width="21%" />
  72 <col width="39%" />
  73 <col width="39%" />
  74 </colgroup>
  75 <thead valign="bottom">
  76 <tr><th class="head">Parameter</th>
  77 <th class="head">Requirement</th>
  78 <th class="head">Description</th>
  79 </tr>
  80 </thead>
  81 <tbody valign="top">
  82 <tr><td><tt class="literal"><span class="pre">Sequence</span></tt>,
  83 <tt class="literal"><span class="pre">Seq1</span></tt>, <tt class="literal"><span class="pre">Seq2</span></tt></td>
  84 <td><a class="reference internal" href="./forward-sequence.html">Forward Sequence</a></td>
  85 <td>Sequences to transform.</td>
  86 </tr>
  87 <tr><td><tt class="literal"><span class="pre">Op</span></tt>,
  88 <tt class="literal"><span class="pre">BinaryOp</span></tt></td>
  89 <td><a class="reference internal" href="./lambda-expression.html">Lambda Expression</a></td>
  90 <td>A transformation.</td>
  91 </tr>
  92 <tr><td><tt class="literal"><span class="pre">In</span></tt></td>
  93 <td><a class="reference internal" href="./inserter.html">Inserter</a></td>
  94 <td>An inserter.</td>
  95 </tr>
  96 </tbody>
  97 </table>
  98 </div>
  99 <div class="section" id="id745">
 100 <h3><a class="subsection-title" href="#expression-semantics" name="expression-semantics">Expression semantics</a></h3>
 101 <p>The semantics of an expression are defined only
 102 where they differ from, or are not defined in <a class="reference internal" href="./reversible-algorithm.html">Reversible Algorithm</a>.</p>
 103 <p>For any <a class="reference internal" href="./forward-sequence.html">Forward Sequence</a>s <tt class="literal"><span class="pre">s</span></tt>, <tt class="literal"><span class="pre">s1</span></tt> and <tt class="literal"><span class="pre">s2</span></tt>, <a class="reference internal" href="./lambda-expression.html">Lambda Expression</a>s <tt class="literal"><span class="pre">op</span></tt> and <tt class="literal"><span class="pre">op2</span></tt>,
 104 and an <a class="reference internal" href="./inserter.html">Inserter</a> <tt class="literal"><span class="pre">in</span></tt>:</p>
 105 <pre class="literal-block">
 106 typedef <a href="./reverse-transform.html" class="identifier">reverse_transform</a>&lt;s,op,in&gt;::type r;
 107 </pre>
 108 <table class="docutils field-list" frame="void" rules="none">
 109 <col class="field-name" />
 110 <col class="field-body" />
 111 <tbody valign="top">
 112 <tr class="field"><th class="field-name">Return type:</th><td class="field-body"><p class="first">A type.</p>
 113 </td>
 114 </tr>
 115 <tr class="field"><th class="field-name">Postcondition:</th><td class="field-body"><p class="first">Equivalent to</p>
 116 <pre class="last literal-block">
 117 typedef <a href="./lambda.html" class="identifier">lambda</a>&lt;op&gt;::type f;
 118 typedef <a href="./lambda.html" class="identifier">lambda</a>&lt;in::operation&gt;::type in_op;
 119
 120 typedef <a href="./reverse-fold.html" class="identifier">reverse_fold</a>&lt;
 121       s
 122     , in::state
 123     , <a href="./bind.html" class="identifier">bind</a>&lt; in_op, <a href="./placeholders.html" class="identifier">_1</a>, <a href="./bind.html" class="identifier">bind</a>&lt;f, <a href="./placeholders.html" class="identifier">_2</a>&gt; &gt;
 124     &gt;::type r;
 125 </pre>
 126 </td>
 127 </tr>
 128 </tbody>
 129 </table>
 130 <pre class="literal-block">
 131 typedef <a href="./transform.html" class="identifier">transform</a>&lt;s1,s2,op,in&gt;::type r;
 132 </pre>
 133 <table class="docutils field-list" frame="void" rules="none">
 134 <col class="field-name" />
 135 <col class="field-body" />
 136 <tbody valign="top">
 137 <tr class="field"><th class="field-name">Return type:</th><td class="field-body"><p class="first">A type.</p>
 138 </td>
 139 </tr>
 140 <tr class="field"><th class="field-name">Postcondition:</th><td class="field-body"><p class="first">Equivalent to</p>
 141 <pre class="last literal-block">
 142 typedef <a href="./lambda.html" class="identifier">lambda</a>&lt;op2&gt;::type f;
 143 typedef <a href="./lambda.html" class="identifier">lambda</a>&lt;in::operation&gt;::type in_op;
 144
 145 typedef <a href="./reverse-fold.html" class="identifier">reverse_fold</a>&lt;
 146       pair_view&lt;s1,s2&gt;
 147     , in::state
 148     , <a href="./bind.html" class="identifier">bind</a>&lt;
 149           in_op
 150         , <a href="./placeholders.html" class="identifier">_1</a>
 151         , <a href="./bind.html" class="identifier">bind</a>&lt;f, <a href="./bind.html" class="identifier">bind</a>&lt;first&lt;&gt;,<a href="./placeholders.html" class="identifier">_2</a>&gt;, <a href="./bind.html" class="identifier">bind</a>&lt;second&lt;&gt;,<a href="./placeholders.html" class="identifier">_2</a>&gt; &gt;
 152         &gt;
 153     &gt;::type r;
 154 </pre>
 155 </td>
 156 </tr>
 157 </tbody>
 158 </table>
 159 </div>
 160 <div class="section" id="id746">
 161 <h3><a class="subsection-title" href="#complexity" name="complexity">Complexity</a></h3>
 162 <p>Linear. Exactly <tt class="literal"><span class="pre"><a href="./size.html" class="identifier">size</a>&lt;s&gt;::value</span></tt> / <tt class="literal"><span class="pre"><a href="./size.html" class="identifier">size</a>&lt;s1&gt;::value</span></tt> applications of
 163 <tt class="literal"><span class="pre">op</span></tt> / <tt class="literal"><span class="pre">op2</span></tt> and <tt class="literal"><span class="pre">in::operation</span></tt>.</p>
 164 </div>
 165 <div class="section" id="id747">
 166 <h3><a class="subsection-title" href="#example" name="example">Example</a></h3>
 167 <pre class="literal-block">
 168 typedef <a href="./vector.html" class="identifier">vector</a>&lt;char,short,int,long,float,double&gt; types;
 169 typedef <a href="./vector.html" class="identifier">vector</a>&lt;double*,float*,long*,int*,short*,char*&gt; pointers;
 170 typedef <a href="./reverse-transform.html" class="identifier">reverse_transform</a>&lt; types,boost::add_pointer&lt;<a href="./placeholders.html" class="identifier">_1</a>&gt; &gt;::type result;
 171
 172 <a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( <a href="./equal.html" class="identifier">equal</a>&lt;result,pointers&gt; ));
 173 </pre>
 174 </div>
 175 <div class="section" id="id748">
 176 <h3><a class="subsection-title" href="#see-also" name="see-also">See also</a></h3>
 177 <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="./transform.html">transform</a>, <a class="reference internal" href="./reverse-copy.html">reverse_copy</a>, <a class="reference internal" href="./replace-if.html">replace_if</a></p>
 178 <!-- Algorithms/Transformation Algorithms//reverse_replace |140 -->
 179 </div>
 180 </div>
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