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11<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>
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-transform.html" class="navigation-link">reverse_transform</a></td>
13</tr></table><div class="header-separator"></div>
14<div class="section" id="reverse-transform">
15<h1><a class="toc-backref" href="./transformation-algorithms.html#id428" name="reverse-transform">reverse_transform</a></h1>
16<div class="section" id="id122">
17<h3><a class="subsection-title" href="#synopsis" name="synopsis">Synopsis</a></h3>
18<pre class="literal-block">
19template&lt;
20      typename Seq
21    , typename Op
22    , typename In = <em>unspecified</em>
23    &gt;
24struct <a href="./reverse-transform.html" class="identifier">reverse_transform</a>
25{
26    typedef <em>unspecified</em> type;
27};
28
29template&lt;
30      typename Seq1
31    , typename Seq2
32    , typename BinaryOp
33    , typename In = <em>unspecified</em>
34    &gt;
35struct <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="id123">
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" 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
46original sequence produced by applying an unary transformation <tt class="literal"><span class="pre">Op</span></tt> to
47every 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
49binary transformation <tt class="literal"><span class="pre">BinaryOp</span></tt> to a pair of elements (e<sub>1</sub>, e2<sub>1</sub>)
50from 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
51order.</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
55details in all cases — <em>end note</em>]</p>
56</div>
57<div class="section" id="id124">
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="algorithms-transformation-reverse-model-of">
64<h3><a class="subsection-title" href="#model-of" name="model-of">Model of</a></h3>
65<p><a class="reference" href="./reversible-algorithm.html">Reversible Algorithm</a></p>
66</div>
67<div class="section" id="id125">
68<h3><a class="subsection-title" href="#parameters" name="parameters">Parameters</a></h3>
69<table border="1" class="table">
70<colgroup>
71<col width="21%" />
72<col width="39%" />
73<col width="39%" />
74</colgroup>
75<thead valign="bottom">
76<tr><th>Parameter</th>
77<th>Requirement</th>
78<th>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" 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" 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" href="./inserter.html">Inserter</a></td>
94<td>An inserter.</td>
95</tr>
96</tbody>
97</table>
98</div>
99<div class="section" id="id126">
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
102where they differ from, or are not defined in <a class="reference" href="./reversible-algorithm.html">Reversible Algorithm</a>.</p>
103<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>,
104and an <a class="reference" href="./inserter.html">Inserter</a> <tt class="literal"><span class="pre">in</span></tt>:</p>
105<pre class="literal-block">
106typedef <a href="./reverse-transform.html" class="identifier">reverse_transform</a>&lt;s,op,in&gt;::type r;
107</pre>
108<table class="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">A type.</td>
113</tr>
114<tr class="field"><th class="field-name">Postcondition:</th><td class="field-body"><p class="first">Equivalent to</p>
115<pre class="last literal-block">
116typedef <a href="./lambda.html" class="identifier">lambda</a>&lt;op&gt;::type f;
117typedef <a href="./lambda.html" class="identifier">lambda</a>&lt;in::operation&gt;::type in_op;
118
119typedef <a href="./reverse-fold.html" class="identifier">reverse_fold</a>&lt; 
120      s
121    , in::state
122    , <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; 
123    &gt;::type r;
124</pre>
125</td>
126</tr>
127</tbody>
128</table>
129<pre class="literal-block">
130typedef <a href="./transform.html" class="identifier">transform</a>&lt;s1,s2,op,in&gt;::type r;
131</pre>
132<table class="field-list" frame="void" rules="none">
133<col class="field-name" />
134<col class="field-body" />
135<tbody valign="top">
136<tr class="field"><th class="field-name">Return type:</th><td class="field-body">A type.</td>
137</tr>
138<tr class="field"><th class="field-name">Postcondition:</th><td class="field-body"><p class="first">Equivalent to</p>
139<pre class="last literal-block">
140typedef <a href="./lambda.html" class="identifier">lambda</a>&lt;op2&gt;::type f;
141typedef <a href="./lambda.html" class="identifier">lambda</a>&lt;in::operation&gt;::type in_op;
142
143typedef <a href="./reverse-fold.html" class="identifier">reverse_fold</a>&lt; 
144      pair_view&lt;s1,s2&gt;
145    , in::state
146    , <a href="./bind.html" class="identifier">bind</a>&lt; 
147          in_op
148        , _1
149        , <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;
150        &gt; 
151    &gt;::type r;
152</pre>
153</td>
154</tr>
155</tbody>
156</table>
157</div>
158<div class="section" id="id127">
159<h3><a class="subsection-title" href="#complexity" name="complexity">Complexity</a></h3>
160<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
161<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>
162</div>
163<div class="section" id="id128">
164<h3><a class="subsection-title" href="#example" name="example">Example</a></h3>
165<pre class="literal-block">
166typedef <a href="./vector.html" class="identifier">vector</a>&lt;char,short,int,long,float,double&gt; types;
167typedef <a href="./vector.html" class="identifier">vector</a>&lt;double*,float*,long*,int*,short*,char*&gt; pointers;
168typedef <a href="./reverse-transform.html" class="identifier">reverse_transform</a>&lt; types,boost::add_pointer&lt;_1&gt; &gt;::type result;
169
170<a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( <a href="./equal.html" class="identifier">equal</a>&lt;result,pointers&gt; ));
171</pre>
172</div>
173<div class="section" id="id129">
174<h3><a class="subsection-title" href="#see-also" name="see-also">See also</a></h3>
175<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>
176<!-- modtime: November 10, 2004 04:32:21 +0000 -->
177<!-- Algorithms/Transformation Algorithms//reverse_replace |140 -->
178</div>
179</div>
180
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