1<?xml version="1.0" encoding="utf-8" ?> 2<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 3<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> 4<head> 5<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 6<meta name="generator" content="Docutils 0.7: http://docutils.sourceforge.net/" /> 7<title>The MPL Reference Manual: copy</title> 8<link rel="stylesheet" href="../style.css" type="text/css" /> 9</head> 10<body class="docframe refmanual"> 11<table class="header"><tr class="header"><td class="header-group navigation-bar"><span class="navigation-group"><a href="./transformation-algorithms.html" class="navigation-link">Prev</a> <a href="./copy-if.html" class="navigation-link">Next</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group">Back <a href="./copy-if.html" class="navigation-link">Along</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./transformation-algorithms.html" class="navigation-link">Up</a> <a href="../refmanual.html" class="navigation-link">Home</a></span><span class="navigation-group-separator"> | </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="./copy.html" class="navigation-link">copy</a></td> 13</tr></table><div class="header-separator"></div> 14<div class="section" id="copy"> 15<h1><a class="toc-backref" href="./transformation-algorithms.html#id1486">copy</a></h1> 16<div class="section" id="id615"> 17<h3><a class="subsection-title" href="#synopsis" name="synopsis">Synopsis</a></h3> 18<pre class="literal-block"> 19template< 20 typename Sequence 21 , typename In = <em>unspecified</em> 22 > 23struct <a href="./copy.html" class="identifier">copy</a> 24{ 25 typedef <em>unspecified</em> type; 26}; 27</pre> 28</div> 29<div class="section" id="id616"> 30<h3><a class="subsection-title" href="#description" name="description">Description</a></h3> 31<p>Returns a copy of the original sequence.</p> 32<p>[<em>Note:</em> This wording applies to a no-inserter version(s) of the algorithm. See the 33<cite>Expression semantics</cite> subsection for a precise specification of the algorithm's 34details in all cases — <em>end note</em>]</p> 35</div> 36<div class="section" id="id617"> 37<h3><a class="subsection-title" href="#header" name="header">Header</a></h3> 38<pre class="literal-block"> 39#include <<a href="../../../../boost/mpl/copy.hpp" class="header">boost/mpl/copy.hpp</a>> 40</pre> 41</div> 42<div class="section" id="id618"> 43<h3><a class="subsection-title" href="#model-of" name="model-of">Model of</a></h3> 44<p><a class="reference internal" href="./reversible-algorithm.html">Reversible Algorithm</a></p> 45</div> 46<div class="section" id="id619"> 47<h3><a class="subsection-title" href="#parameters" name="parameters">Parameters</a></h3> 48<table border="1" class="docutils table"> 49<colgroup> 50<col width="21%" /> 51<col width="37%" /> 52<col width="42%" /> 53</colgroup> 54<thead valign="bottom"> 55<tr><th class="head">Parameter</th> 56<th class="head">Requirement</th> 57<th class="head">Description</th> 58</tr> 59</thead> 60<tbody valign="top"> 61<tr><td><tt class="literal"><span class="pre">Sequence</span></tt></td> 62<td><a class="reference internal" href="./forward-sequence.html">Forward Sequence</a></td> 63<td>A sequence to copy.</td> 64</tr> 65<tr><td><tt class="literal"><span class="pre">In</span></tt></td> 66<td><a class="reference internal" href="./inserter.html">Inserter</a></td> 67<td>An inserter.</td> 68</tr> 69</tbody> 70</table> 71</div> 72<div class="section" id="id620"> 73<h3><a class="subsection-title" href="#expression-semantics" name="expression-semantics">Expression semantics</a></h3> 74<p>The semantics of an expression are defined only 75where they differ from, or are not defined in <a class="reference internal" href="./reversible-algorithm.html">Reversible Algorithm</a>.</p> 76<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> 77<pre class="literal-block"> 78typedef <a href="./copy.html" class="identifier">copy</a><s,in>::type r; 79</pre> 80<table class="docutils field-list" frame="void" rules="none"> 81<col class="field-name" /> 82<col class="field-body" /> 83<tbody valign="top"> 84<tr class="field"><th class="field-name">Return type:</th><td class="field-body"><p class="first">A type.</p> 85</td> 86</tr> 87<tr class="field"><th class="field-name">Semantics:</th><td class="field-body"><p class="first">Equivalent to</p> 88<pre class="last literal-block"> 89typedef <a href="./fold.html" class="identifier">fold</a>< s,in::state,in::operation >::type r; 90</pre> 91</td> 92</tr> 93</tbody> 94</table> 95</div> 96<div class="section" id="id621"> 97<h3><a class="subsection-title" href="#complexity" name="complexity">Complexity</a></h3> 98<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> 99</div> 100<div class="section" id="id622"> 101<h3><a class="subsection-title" href="#example" name="example">Example</a></h3> 102<pre class="literal-block"> 103typedef <a href="./vector-c.html" class="identifier">vector_c</a><int,0,1,2,3,4,5,6,7,8,9> numbers; 104typedef <a href="./copy.html" class="identifier">copy</a>< 105 <a href="./range-c.html" class="identifier">range_c</a><int,10,20> 106 , <a href="./back-inserter.html" class="identifier">back_inserter</a>< numbers > 107 >::type result; 108 109<a href="./assert-relation.html" class="identifier">BOOST_MPL_ASSERT_RELATION</a>( <a href="./size.html" class="identifier">size</a><result>::value, ==, 20 ); 110<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> > )); 111</pre> 112</div> 113<div class="section" id="id623"> 114<h3><a class="subsection-title" href="#see-also" name="see-also">See also</a></h3> 115<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> 116<!-- Algorithms/Transformation Algorithms//copy_if |20 --> 117</div> 118</div> 119 120<div class="footer-separator"></div> 121<table class="footer"><tr class="footer"><td class="header-group navigation-bar"><span class="navigation-group"><a href="./transformation-algorithms.html" class="navigation-link">Prev</a> <a href="./copy-if.html" class="navigation-link">Next</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group">Back <a href="./copy-if.html" class="navigation-link">Along</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./transformation-algorithms.html" class="navigation-link">Up</a> <a href="../refmanual.html" class="navigation-link">Home</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./refmanual_toc.html" class="navigation-link">Full TOC</a></span></td> 122<td><div class="copyright-footer"><div class="copyright">Copyright © 2001-2009 Aleksey Gurtovoy and David Abrahams</div> 123Distributed under the Boost Software License, Version 1.0. (See accompanying 124file LICENSE_1_0.txt or copy at <a class="reference external" href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)</div></td></tr></table></body> 125</html> 126