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| <title>The MPL Reference Manual: reverse_copy_if</title> |
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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-copy-if.html" class="navigation-link">reverse_copy_if</a></td> |
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| <div class="section" id="reverse-copy-if"> |
| <h1><a class="toc-backref" href="./transformation-algorithms.html#id1499">reverse_copy_if</a></h1> |
| <div class="section" id="id731"> |
| <h3><a class="subsection-title" href="#synopsis" name="synopsis">Synopsis</a></h3> |
| <pre class="literal-block"> |
| template< |
| typename Sequence |
| , typename Pred |
| , typename In = <em>unspecified</em> |
| > |
| struct <a href="./reverse-copy-if.html" class="identifier">reverse_copy_if</a> |
| { |
| typedef <em>unspecified</em> type; |
| }; |
| </pre> |
| </div> |
| <div class="section" id="id732"> |
| <h3><a class="subsection-title" href="#description" name="description">Description</a></h3> |
| <p>Returns a reversed, filtered copy of the original sequence containing the |
| elements that satisfy the predicate <tt class="literal"><span class="pre">Pred</span></tt>.</p> |
| <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="id733"> |
| <h3><a class="subsection-title" href="#header" name="header">Header</a></h3> |
| <pre class="literal-block"> |
| #include <<a href="../../../../boost/mpl/copy_if.hpp" class="header">boost/mpl/copy_if.hpp</a>> |
| </pre> |
| </div> |
| <div class="section" id="id734"> |
| <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="id735"> |
| <h3><a class="subsection-title" href="#parameters" name="parameters">Parameters</a></h3> |
| <table border="1" class="docutils table"> |
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| <col width="19%" /> |
| <col width="43%" /> |
| <col width="38%" /> |
| </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></td> |
| <td><a class="reference internal" href="./forward-sequence.html">Forward Sequence</a></td> |
| <td>A sequence to copy.</td> |
| </tr> |
| <tr><td><tt class="literal"><span class="pre">Pred</span></tt></td> |
| <td>Unary <a class="reference internal" href="./lambda-expression.html">Lambda Expression</a></td> |
| <td>A copying condition.</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="id736"> |
| <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> <tt class="literal"><span class="pre">s</span></tt>, an unary <a class="reference internal" href="./lambda-expression.html">Lambda Expression</a> <tt class="literal"><span class="pre">pred</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-copy-if.html" class="identifier">reverse_copy_if</a><s,pred,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">Semantics:</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><pred>::type p; |
| typedef <a href="./lambda.html" class="identifier">lambda</a><in::operation>::type op; |
| |
| typedef <a href="./reverse-fold.html" class="identifier">reverse_fold</a>< |
| s |
| , in::state |
| , <a href="./eval-if.html" class="identifier">eval_if</a>< |
| <a href="./apply-wrap.html" class="identifier">apply_wrap</a><tt class="literal"><span class="pre">1</span></tt><p,<a href="./placeholders.html" class="identifier">_2</a>> |
| , <a href="./apply-wrap.html" class="identifier">apply_wrap</a><tt class="literal"><span class="pre">2</span></tt><op,<a href="./placeholders.html" class="identifier">_1</a>,<a href="./placeholders.html" class="identifier">_2</a>> |
| , <a href="./identity.html" class="identifier">identity</a><<a href="./placeholders.html" class="identifier">_1</a>> |
| > |
| >::type r; |
| </pre> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| <div class="section" id="id737"> |
| <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> applications of <tt class="literal"><span class="pre">pred</span></tt>, and at |
| most <tt class="literal"><span class="pre"><a href="./size.html" class="identifier">size</a><s>::value</span></tt> applications of <tt class="literal"><span class="pre">in::operation</span></tt>.</p> |
| </div> |
| <div class="section" id="id738"> |
| <h3><a class="subsection-title" href="#example" name="example">Example</a></h3> |
| <pre class="literal-block"> |
| typedef <a href="./reverse-copy-if.html" class="identifier">reverse_copy_if</a>< |
| <a href="./range-c.html" class="identifier">range_c</a><int,0,10> |
| , <a href="./less.html" class="identifier">less</a>< <a href="./placeholders.html" class="identifier">_1</a>, <a href="./int.html" class="identifier">int_</a><5> > |
| , <a href="./front-inserter.html" class="identifier">front_inserter</a>< <a href="./vector.html" class="identifier">vector</a><> > |
| >::type result; |
| |
| <a href="./assert-relation.html" class="identifier">BOOST_MPL_ASSERT_RELATION</a>( <a href="./size.html" class="identifier">size</a><result>::value, ==, 5 ); |
| <a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( <a href="./equal.html" class="identifier">equal</a><result,<a href="./range-c.html" class="identifier">range_c</a><int,0,5> > )); |
| </pre> |
| </div> |
| <div class="section" id="id739"> |
| <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="./copy-if.html">copy_if</a>, <a class="reference internal" href="./reverse-copy.html">reverse_copy</a>, <a class="reference internal" href="./remove-if.html">remove_if</a>, <a class="reference internal" href="./replace-if.html">replace_if</a></p> |
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