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<div class="section" id="reverse-transform">
<h1><a class="toc-backref" href="./transformation-algorithms.html#id1500">reverse_transform</a></h1>
<div class="section" id="id740">
<h3><a class="subsection-title" href="#synopsis" name="synopsis">Synopsis</a></h3>
<pre class="literal-block">
template&lt;
      typename Seq
    , typename Op
    , typename In = <em>unspecified</em>
    &gt;
struct <a href="./reverse-transform.html" class="identifier">reverse_transform</a>
{
    typedef <em>unspecified</em> type;
};

template&lt;
      typename Seq1
    , typename Seq2
    , typename BinaryOp
    , typename In = <em>unspecified</em>
    &gt;
struct <a href="./reverse-transform.html" class="identifier">reverse_transform</a>
{
    typedef <em>unspecified</em> type;
};
</pre>
</div>
<div class="section" id="id741">
<h3><a class="subsection-title" href="#description" name="description">Description</a></h3>
<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>
<ul class="simple">
<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
original sequence produced by applying an unary transformation <tt class="literal"><span class="pre">Op</span></tt> to
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>
<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
binary transformation <tt class="literal"><span class="pre">BinaryOp</span></tt> to a pair of elements (e<sub>1</sub>, e2<sub>1</sub>)
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
order.</li>
</ul>
<p>[<em>Note:</em> This wording applies to a no-inserter version(s) of the algorithm. See the
<cite>Expression semantics</cite> subsection for a precise specification of the algorithm's
details in all cases — <em>end note</em>]</p>
</div>
<div class="section" id="id742">
<h3><a class="subsection-title" href="#header" name="header">Header</a></h3>
<pre class="literal-block">
#include &lt;<a href="../../../../boost/mpl/transform.hpp" class="header">boost/mpl/transform.hpp</a>&gt;
</pre>
</div>
<div class="section" id="id743">
<h3><a class="subsection-title" href="#model-of" name="model-of">Model of</a></h3>
<p><a class="reference internal" href="./reversible-algorithm.html">Reversible Algorithm</a></p>
</div>
<div class="section" id="id744">
<h3><a class="subsection-title" href="#parameters" name="parameters">Parameters</a></h3>
<table border="1" class="docutils table">
<colgroup>
<col width="21%" />
<col width="39%" />
<col width="39%" />
</colgroup>
<thead valign="bottom">
<tr><th class="head">Parameter</th>
<th class="head">Requirement</th>
<th class="head">Description</th>
</tr>
</thead>
<tbody valign="top">
<tr><td><tt class="literal"><span class="pre">Sequence</span></tt>,
<tt class="literal"><span class="pre">Seq1</span></tt>, <tt class="literal"><span class="pre">Seq2</span></tt></td>
<td><a class="reference internal" href="./forward-sequence.html">Forward Sequence</a></td>
<td>Sequences to transform.</td>
</tr>
<tr><td><tt class="literal"><span class="pre">Op</span></tt>,
<tt class="literal"><span class="pre">BinaryOp</span></tt></td>
<td><a class="reference internal" href="./lambda-expression.html">Lambda Expression</a></td>
<td>A transformation.</td>
</tr>
<tr><td><tt class="literal"><span class="pre">In</span></tt></td>
<td><a class="reference internal" href="./inserter.html">Inserter</a></td>
<td>An inserter.</td>
</tr>
</tbody>
</table>
</div>
<div class="section" id="id745">
<h3><a class="subsection-title" href="#expression-semantics" name="expression-semantics">Expression semantics</a></h3>
<p>The semantics of an expression are defined only
where they differ from, or are not defined in <a class="reference internal" href="./reversible-algorithm.html">Reversible Algorithm</a>.</p>
<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>,
and an <a class="reference internal" href="./inserter.html">Inserter</a> <tt class="literal"><span class="pre">in</span></tt>:</p>
<pre class="literal-block">
typedef <a href="./reverse-transform.html" class="identifier">reverse_transform</a>&lt;s,op,in&gt;::type r;
</pre>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Return type:</th><td class="field-body"><p class="first">A type.</p>
</td>
</tr>
<tr class="field"><th class="field-name">Postcondition:</th><td class="field-body"><p class="first">Equivalent to</p>
<pre class="last literal-block">
typedef <a href="./lambda.html" class="identifier">lambda</a>&lt;op&gt;::type f;
typedef <a href="./lambda.html" class="identifier">lambda</a>&lt;in::operation&gt;::type in_op;

typedef <a href="./reverse-fold.html" class="identifier">reverse_fold</a>&lt;
      s
    , in::state
    , <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;
    &gt;::type r;
</pre>
</td>
</tr>
</tbody>
</table>
<pre class="literal-block">
typedef <a href="./transform.html" class="identifier">transform</a>&lt;s1,s2,op,in&gt;::type r;
</pre>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Return type:</th><td class="field-body"><p class="first">A type.</p>
</td>
</tr>
<tr class="field"><th class="field-name">Postcondition:</th><td class="field-body"><p class="first">Equivalent to</p>
<pre class="last literal-block">
typedef <a href="./lambda.html" class="identifier">lambda</a>&lt;op2&gt;::type f;
typedef <a href="./lambda.html" class="identifier">lambda</a>&lt;in::operation&gt;::type in_op;

typedef <a href="./reverse-fold.html" class="identifier">reverse_fold</a>&lt;
      pair_view&lt;s1,s2&gt;
    , in::state
    , <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="./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;
        &gt;
    &gt;::type r;
</pre>
</td>
</tr>
</tbody>
</table>
</div>
<div class="section" id="id746">
<h3><a class="subsection-title" href="#complexity" name="complexity">Complexity</a></h3>
<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
<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>
</div>
<div class="section" id="id747">
<h3><a class="subsection-title" href="#example" name="example">Example</a></h3>
<pre class="literal-block">
typedef <a href="./vector.html" class="identifier">vector</a>&lt;char,short,int,long,float,double&gt; types;
typedef <a href="./vector.html" class="identifier">vector</a>&lt;double*,float*,long*,int*,short*,char*&gt; pointers;
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;

<a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( <a href="./equal.html" class="identifier">equal</a>&lt;result,pointers&gt; ));
</pre>
</div>
<div class="section" id="id748">
<h3><a class="subsection-title" href="#see-also" name="see-also">See also</a></h3>
<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>
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