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- <title>The MPL Reference Manual: copy</title>
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- <div class="section" id="copy">
- <h1><a class="toc-backref" href="./transformation-algorithms.html#id1486">copy</a></h1>
- <div class="section" id="id615">
- <h3><a class="subsection-title" href="#synopsis" name="synopsis">Synopsis</a></h3>
- <pre class="literal-block">
- template<
- typename Sequence
- , typename In = <em>unspecified</em>
- >
- struct <a href="./copy.html" class="identifier">copy</a>
- {
- typedef <em>unspecified</em> type;
- };
- </pre>
- </div>
- <div class="section" id="id616">
- <h3><a class="subsection-title" href="#description" name="description">Description</a></h3>
- <p>Returns a copy of the original sequence.</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="id617">
- <h3><a class="subsection-title" href="#header" name="header">Header</a></h3>
- <pre class="literal-block">
- #include <<a href="../../../../boost/mpl/copy.hpp" class="header">boost/mpl/copy.hpp</a>>
- </pre>
- </div>
- <div class="section" id="id618">
- <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="id619">
- <h3><a class="subsection-title" href="#parameters" name="parameters">Parameters</a></h3>
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- <col width="37%" />
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- <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">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="id620">
- <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>, 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="./copy.html" class="identifier">copy</a><s,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="./fold.html" class="identifier">fold</a>< s,in::state,in::operation >::type r;
- </pre>
- </td>
- </tr>
- </tbody>
- </table>
- </div>
- <div class="section" id="id621">
- <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">in::operation</span></tt>.</p>
- </div>
- <div class="section" id="id622">
- <h3><a class="subsection-title" href="#example" name="example">Example</a></h3>
- <pre class="literal-block">
- typedef <a href="./vector-c.html" class="identifier">vector_c</a><int,0,1,2,3,4,5,6,7,8,9> numbers;
- typedef <a href="./copy.html" class="identifier">copy</a><
- <a href="./range-c.html" class="identifier">range_c</a><int,10,20>
- , <a href="./back-inserter.html" class="identifier">back_inserter</a>< numbers >
- >::type result;
- <a href="./assert-relation.html" class="identifier">BOOST_MPL_ASSERT_RELATION</a>( <a href="./size.html" class="identifier">size</a><result>::value, ==, 20 );
- <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,0,20> > ));
- </pre>
- </div>
- <div class="section" id="id623">
- <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="./reverse-copy.html">reverse_copy</a>, <a class="reference internal" href="./copy-if.html">copy_if</a>, <a class="reference internal" href="./transform.html">transform</a></p>
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- <td><div class="copyright-footer"><div class="copyright">Copyright © 2001-2009 Aleksey Gurtovoy and David Abrahams</div>
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