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13<body class="docframe refmanual">
14<table class="header"><tr class="header"><td class="header-group navigation-bar"><span class="navigation-group"><a href="./reverse-copy-if.html" class="navigation-link">Prev</a>&nbsp;<a href="./reverse-replace.html" class="navigation-link">Next</a></span><span class="navigation-group-separator">&nbsp;|&nbsp;</span><span class="navigation-group"><a href="./reverse-copy-if.html" class="navigation-link">Back</a>&nbsp;<a href="./reverse-replace.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>
15<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-transform.html" class="navigation-link">reverse_transform</a></td>
16</tr></table><div class="header-separator"></div>
17<div class="section" id="reverse-transform">
18<h1><a class="toc-backref" href="./transformation-algorithms.html#id428" name="reverse-transform">reverse_transform</a></h1>
19<div class="section" id="id122">
20<h3><a class="subsection-title" href="#synopsis" name="synopsis">Synopsis</a></h3>
21<pre class="literal-block">
22template&lt;
23      typename Seq
24    , typename Op
25    , typename In = <em>unspecified</em>
26    &gt;
27struct <a href="./reverse-transform.html" class="identifier">reverse_transform</a>
28{
29    typedef <em>unspecified</em> type;
30};
31
32template&lt;
33      typename Seq1
34    , typename Seq2
35    , typename BinaryOp
36    , typename In = <em>unspecified</em>
37    &gt;
38struct <a href="./reverse-transform.html" class="identifier">reverse_transform</a>
39{
40    typedef <em>unspecified</em> type;
41};
42</pre>
43</div>
44<div class="section" id="id123">
45<h3><a class="subsection-title" href="#description" name="description">Description</a></h3>
46<p><tt class="literal"><span class="pre"><a href="./reverse-transform.html" class="identifier">reverse_transform</a></span></tt> is an <a class="reference" href="./terminology.html#overloaded-name">overloaded name</a>:</p>
47<ul class="simple">
48<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
49original sequence produced by applying an unary transformation <tt class="literal"><span class="pre">Op</span></tt> to
50every 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>
51<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
52binary transformation <tt class="literal"><span class="pre">BinaryOp</span></tt> to a pair of elements (e<sub>1</sub>, e2<sub>1</sub>)
53from 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
54order.</li>
55</ul>
56<p>[<em>Note:</em> This wording applies to a no-inserter version(s) of the algorithm. See the
57<cite>Expression semantics</cite> subsection for a precise specification of the algorithm's
58details in all cases — <em>end note</em>]</p>
59</div>
60<div class="section" id="id124">
61<h3><a class="subsection-title" href="#header" name="header">Header</a></h3>
62<pre class="literal-block">
63#include &lt;<a href="../../../../boost/mpl/transform.hpp" class="header">boost/mpl/transform.hpp</a>&gt;
64</pre>
65</div>
66<div class="section" id="algorithms-transformation-reverse-model-of">
67<h3><a class="subsection-title" href="#model-of" name="model-of">Model of</a></h3>
68<p><a class="reference" href="./reversible-algorithm.html">Reversible Algorithm</a></p>
69</div>
70<div class="section" id="id125">
71<h3><a class="subsection-title" href="#parameters" name="parameters">Parameters</a></h3>
72<table border="1" class="table">
73<colgroup>
74<col width="21%" />
75<col width="39%" />
76<col width="39%" />
77</colgroup>
78<thead valign="bottom">
79<tr><th>Parameter</th>
80<th>Requirement</th>
81<th>Description</th>
82</tr>
83</thead>
84<tbody valign="top">
85<tr><td><tt class="literal"><span class="pre">Sequence</span></tt>,
86<tt class="literal"><span class="pre">Seq1</span></tt>, <tt class="literal"><span class="pre">Seq2</span></tt></td>
87<td><a class="reference" href="./forward-sequence.html">Forward Sequence</a></td>
88<td>Sequences to transform.</td>
89</tr>
90<tr><td><tt class="literal"><span class="pre">Op</span></tt>,
91<tt class="literal"><span class="pre">BinaryOp</span></tt></td>
92<td><a class="reference" href="./lambda-expression.html">Lambda Expression</a></td>
93<td>A transformation.</td>
94</tr>
95<tr><td><tt class="literal"><span class="pre">In</span></tt></td>
96<td><a class="reference" href="./inserter.html">Inserter</a></td>
97<td>An inserter.</td>
98</tr>
99</tbody>
100</table>
101</div>
102<div class="section" id="id126">
103<h3><a class="subsection-title" href="#expression-semantics" name="expression-semantics">Expression semantics</a></h3>
104<p>The semantics of an expression are defined only
105where they differ from, or are not defined in <a class="reference" href="./reversible-algorithm.html">Reversible Algorithm</a>.</p>
106<p>For any <a class="reference" 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" 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>,
107and an <a class="reference" href="./inserter.html">Inserter</a> <tt class="literal"><span class="pre">in</span></tt>:</p>
108<pre class="literal-block">
109typedef <a href="./reverse-transform.html" class="identifier">reverse_transform</a>&lt;s,op,in&gt;::type r;
110</pre>
111<table class="field-list" frame="void" rules="none">
112<col class="field-name" />
113<col class="field-body" />
114<tbody valign="top">
115<tr class="field"><th class="field-name">Return type:</th><td class="field-body">A type.</td>
116</tr>
117<tr class="field"><th class="field-name">Postcondition:</th><td class="field-body"><p class="first">Equivalent to</p>
118<pre class="last literal-block">
119typedef <a href="./lambda.html" class="identifier">lambda</a>&lt;op&gt;::type f;
120typedef <a href="./lambda.html" class="identifier">lambda</a>&lt;in::operation&gt;::type in_op;
121
122typedef <a href="./reverse-fold.html" class="identifier">reverse_fold</a>&lt; 
123      s
124    , in::state
125    , <a href="./bind.html" class="identifier">bind</a>&lt; in_op, _1, <a href="./bind.html" class="identifier">bind</a>&lt;f, _2&gt; &gt; 
126    &gt;::type r;
127</pre>
128</td>
129</tr>
130</tbody>
131</table>
132<pre class="literal-block">
133typedef <a href="./transform.html" class="identifier">transform</a>&lt;s1,s2,op,in&gt;::type r;
134</pre>
135<table class="field-list" frame="void" rules="none">
136<col class="field-name" />
137<col class="field-body" />
138<tbody valign="top">
139<tr class="field"><th class="field-name">Return type:</th><td class="field-body">A type.</td>
140</tr>
141<tr class="field"><th class="field-name">Postcondition:</th><td class="field-body"><p class="first">Equivalent to</p>
142<pre class="last literal-block">
143typedef <a href="./lambda.html" class="identifier">lambda</a>&lt;op2&gt;::type f;
144typedef <a href="./lambda.html" class="identifier">lambda</a>&lt;in::operation&gt;::type in_op;
145
146typedef <a href="./reverse-fold.html" class="identifier">reverse_fold</a>&lt; 
147      pair_view&lt;s1,s2&gt;
148    , in::state
149    , <a href="./bind.html" class="identifier">bind</a>&lt; 
150          in_op
151        , _1
152        , <a href="./bind.html" class="identifier">bind</a>&lt;f, <a href="./bind.html" class="identifier">bind</a>&lt;first&lt;&gt;,_2&gt;, <a href="./bind.html" class="identifier">bind</a>&lt;second&lt;&gt;,_2&gt; &gt;
153        &gt; 
154    &gt;::type r;
155</pre>
156</td>
157</tr>
158</tbody>
159</table>
160</div>
161<div class="section" id="id127">
162<h3><a class="subsection-title" href="#complexity" name="complexity">Complexity</a></h3>
163<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
164<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>
165</div>
166<div class="section" id="id128">
167<h3><a class="subsection-title" href="#example" name="example">Example</a></h3>
168<pre class="literal-block">
169typedef <a href="./vector.html" class="identifier">vector</a>&lt;char,short,int,long,float,double&gt; types;
170typedef <a href="./vector.html" class="identifier">vector</a>&lt;double*,float*,long*,int*,short*,char*&gt; pointers;
171typedef <a href="./reverse-transform.html" class="identifier">reverse_transform</a>&lt; types,boost::add_pointer&lt;_1&gt; &gt;::type result;
172
173<a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( <a href="./equal.html" class="identifier">equal</a>&lt;result,pointers&gt; ));
174</pre>
175</div>
176<div class="section" id="id129">
177<h3><a class="subsection-title" href="#see-also" name="see-also">See also</a></h3>
178<p><a class="reference" href="./transformation-algorithms.html">Transformation Algorithms</a>, <a class="reference" href="./reversible-algorithm.html">Reversible Algorithm</a>, <a class="refentry reference" href="./transform.html"><tt class="refentry literal"><span class="pre">transform</span></tt></a>, <a class="refentry reference" href="./reverse-copy.html"><tt class="refentry literal"><span class="pre">reverse_copy</span></tt></a>, <a class="refentry reference" href="./replace-if.html"><tt class="refentry literal"><span class="pre">replace_if</span></tt></a></p>
179<!-- modtime: November 10, 2004 04:32:21 +0000 -->
180<!-- Algorithms/Transformation Algorithms//reverse_replace |140 -->
181</div>
182</div>
183
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