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| <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> |
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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< |
| typename Seq |
| , typename Op |
| , typename In = <em>unspecified</em> |
| > |
| struct <a href="./reverse-transform.html" class="identifier">reverse_transform</a> |
| { |
| typedef <em>unspecified</em> type; |
| }; |
| |
| template< |
| typename Seq1 |
| , typename Seq2 |
| , typename BinaryOp |
| , typename In = <em>unspecified</em> |
| > |
| 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><Seq,Op></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><Sequence>::type</span></tt>, <tt class="literal"><span class="pre"><a href="./end.html" class="identifier">end</a><Sequence>::type</span></tt>) range.</li> |
| <li><tt class="literal"><span class="pre"><a href="./reverse-transform.html" class="identifier">reverse_transform</a><Seq1,Seq2,Op></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><Seq1>::type</span></tt>, <tt class="literal"><span class="pre"><a href="./end.html" class="identifier">end</a><Seq1>::type</span></tt>) and [<tt class="literal"><span class="pre"><a href="./begin.html" class="identifier">begin</a><Seq2>::type</span></tt>, <tt class="literal"><span class="pre"><a href="./end.html" class="identifier">end</a><Seq2>::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 <<a href="../../../../boost/mpl/transform.hpp" class="header">boost/mpl/transform.hpp</a>> |
| </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><s,op,in>::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><op>::type f; |
| typedef <a href="./lambda.html" class="identifier">lambda</a><in::operation>::type in_op; |
| |
| typedef <a href="./reverse-fold.html" class="identifier">reverse_fold</a>< |
| s |
| , in::state |
| , <a href="./bind.html" class="identifier">bind</a>< in_op, <a href="./placeholders.html" class="identifier">_1</a>, <a href="./bind.html" class="identifier">bind</a><f, <a href="./placeholders.html" class="identifier">_2</a>> > |
| >::type r; |
| </pre> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| <pre class="literal-block"> |
| typedef <a href="./transform.html" class="identifier">transform</a><s1,s2,op,in>::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><op2>::type f; |
| typedef <a href="./lambda.html" class="identifier">lambda</a><in::operation>::type in_op; |
| |
| typedef <a href="./reverse-fold.html" class="identifier">reverse_fold</a>< |
| pair_view<s1,s2> |
| , in::state |
| , <a href="./bind.html" class="identifier">bind</a>< |
| in_op |
| , <a href="./placeholders.html" class="identifier">_1</a> |
| , <a href="./bind.html" class="identifier">bind</a><f, <a href="./bind.html" class="identifier">bind</a><first<>,<a href="./placeholders.html" class="identifier">_2</a>>, <a href="./bind.html" class="identifier">bind</a><second<>,<a href="./placeholders.html" class="identifier">_2</a>> > |
| > |
| >::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><s>::value</span></tt> / <tt class="literal"><span class="pre"><a href="./size.html" class="identifier">size</a><s1>::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><char,short,int,long,float,double> types; |
| typedef <a href="./vector.html" class="identifier">vector</a><double*,float*,long*,int*,short*,char*> pointers; |
| typedef <a href="./reverse-transform.html" class="identifier">reverse_transform</a>< types,boost::add_pointer<<a href="./placeholders.html" class="identifier">_1</a>> >::type result; |
| |
| <a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( <a href="./equal.html" class="identifier">equal</a><result,pointers> )); |
| </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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