1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>unique_copy</title> 5<link rel="stylesheet" href="../../../../../../../../doc/src/boostbook.css" type="text/css"> 6<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> 7<link rel="home" href="../../../../index.html" title="Chapter 1. Range 2.0"> 8<link rel="up" href="../mutating.html" title="Mutating algorithms"> 9<link rel="prev" href="unique.html" title="unique"> 10<link rel="next" href="../non_mutating.html" title="Non-mutating algorithms"> 11</head> 12<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> 13<table cellpadding="2" width="100%"><tr> 14<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../../../boost.png"></td> 15<td align="center"><a href="../../../../../../../../index.html">Home</a></td> 16<td align="center"><a href="../../../../../../../../libs/libraries.htm">Libraries</a></td> 17<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> 18<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> 19<td align="center"><a href="../../../../../../../../more/index.htm">More</a></td> 20</tr></table> 21<hr> 22<div class="spirit-nav"> 23<a accesskey="p" href="unique.html"><img src="../../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../mutating.html"><img src="../../../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../../../index.html"><img src="../../../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="../non_mutating.html"><img src="../../../../../../../../doc/src/images/next.png" alt="Next"></a> 24</div> 25<div class="section"> 26<div class="titlepage"><div><div><h5 class="title"> 27<a name="range.reference.algorithms.mutating.unique_copy"></a><a class="link" href="unique_copy.html" title="unique_copy">unique_copy</a> 28</h5></div></div></div> 29<h6> 30<a name="range.reference.algorithms.mutating.unique_copy.h0"></a> 31 <span class="phrase"><a name="range.reference.algorithms.mutating.unique_copy.prototype"></a></span><a class="link" href="unique_copy.html#range.reference.algorithms.mutating.unique_copy.prototype">Prototype</a> 32 </h6> 33<p> 34</p> 35<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span><span class="keyword">class</span> <span class="identifier">SinglePassRange</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">OutputIterator</span><span class="special">></span> 36<span class="identifier">OutputIterator</span> <span class="identifier">unique_copy</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">SinglePassRange</span><span class="special">&</span> <span class="identifier">rng</span><span class="special">,</span> <span class="identifier">OutputIterator</span> <span class="identifier">out</span><span class="special">);</span> 37 38<span class="keyword">template</span><span class="special"><</span><span class="keyword">class</span> <span class="identifier">SinglePassRange</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">OutputIterator</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">BinaryPredicate</span><span class="special">></span> 39<span class="identifier">OutputIterator</span> <span class="identifier">unique_copy</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">SinglePassRange</span><span class="special">&</span> <span class="identifier">rng</span><span class="special">,</span> <span class="identifier">OutputIterator</span> <span class="identifier">out</span><span class="special">,</span> <span class="identifier">BinaryPredicate</span> <span class="identifier">pred</span><span class="special">);</span> 40</pre> 41<p> 42 </p> 43<h6> 44<a name="range.reference.algorithms.mutating.unique_copy.h1"></a> 45 <span class="phrase"><a name="range.reference.algorithms.mutating.unique_copy.description"></a></span><a class="link" href="unique_copy.html#range.reference.algorithms.mutating.unique_copy.description">Description</a> 46 </h6> 47<p> 48 <code class="computeroutput"><span class="identifier">unique_copy</span></code> copies the 49 first element of each sequence of duplicates encountered in <code class="computeroutput"><span class="identifier">rng</span></code> to <code class="computeroutput"><span class="identifier">out</span></code>. 50 </p> 51<p> 52 Equality is determined by the predicate if one is supplied, or by <code class="computeroutput"><span class="keyword">operator</span><span class="special">==()</span></code> 53 for <code class="computeroutput"><span class="identifier">SinglePassRange</span></code>'s 54 value type. 55 </p> 56<h6> 57<a name="range.reference.algorithms.mutating.unique_copy.h2"></a> 58 <span class="phrase"><a name="range.reference.algorithms.mutating.unique_copy.definition"></a></span><a class="link" href="unique_copy.html#range.reference.algorithms.mutating.unique_copy.definition">Definition</a> 59 </h6> 60<p> 61 Defined in the header file <code class="computeroutput"><span class="identifier">boost</span><span class="special">/</span><span class="identifier">range</span><span class="special">/</span><span class="identifier">algorithm</span><span class="special">/</span><span class="identifier">unique_copy</span><span class="special">.</span><span class="identifier">hpp</span></code> 62 </p> 63<h6> 64<a name="range.reference.algorithms.mutating.unique_copy.h3"></a> 65 <span class="phrase"><a name="range.reference.algorithms.mutating.unique_copy.requirements"></a></span><a class="link" href="unique_copy.html#range.reference.algorithms.mutating.unique_copy.requirements">Requirements</a> 66 </h6> 67<p> 68 <span class="bold"><strong>For the non-predicate versions of unique:</strong></span> 69 </p> 70<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> 71<li class="listitem"> 72 <code class="computeroutput"><span class="identifier">SinglePassRange</span></code> is 73 a model of the <a class="link" href="../../../concepts/single_pass_range.html" title="Single Pass Range">Single 74 Pass Range</a> Concept. 75 </li> 76<li class="listitem"> 77 <code class="computeroutput"><span class="identifier">SinglePassRange</span></code> is 78 mutable. 79 </li> 80<li class="listitem"> 81 <code class="computeroutput"><span class="identifier">SinglePassRange</span></code>'s 82 value type is a model of the <code class="computeroutput"><span class="identifier">EqualityComparableConcept</span></code>. 83 </li> 84<li class="listitem"> 85 <code class="computeroutput"><span class="identifier">OutputIterator</span></code> is 86 a model of the <code class="computeroutput"><span class="identifier">OutputIteratorConcept</span></code>. 87 </li> 88</ul></div> 89<p> 90 <span class="bold"><strong>For the predicate versions of unique:</strong></span> 91 </p> 92<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> 93<li class="listitem"> 94 <code class="computeroutput"><span class="identifier">SinglePassRange</span></code> is 95 a model of the <a class="link" href="../../../concepts/single_pass_range.html" title="Single Pass Range">Single 96 Pass Range</a> Concept. 97 </li> 98<li class="listitem"> 99 <code class="computeroutput"><span class="identifier">SinglePassRange</span></code> is 100 mutable. 101 </li> 102<li class="listitem"> 103 <code class="computeroutput"><span class="identifier">BinaryPredicate</span></code> is 104 a model of the <code class="computeroutput"><span class="identifier">BinaryPredicateConcept</span></code>. 105 </li> 106<li class="listitem"> 107 <code class="computeroutput"><span class="identifier">SinglePassRange</span></code>'s 108 value type is convertible to <code class="computeroutput"><span class="identifier">BinaryPredicate</span></code>'s 109 first argument type and to <code class="computeroutput"><span class="identifier">BinaryPredicate</span></code>'s 110 second argument type. 111 </li> 112<li class="listitem"> 113 <code class="computeroutput"><span class="identifier">OutputIterator</span></code> is 114 a model of the <code class="computeroutput"><span class="identifier">OutputIteratorConcept</span></code>. 115 </li> 116</ul></div> 117<h6> 118<a name="range.reference.algorithms.mutating.unique_copy.h4"></a> 119 <span class="phrase"><a name="range.reference.algorithms.mutating.unique_copy.complexity"></a></span><a class="link" href="unique_copy.html#range.reference.algorithms.mutating.unique_copy.complexity">Complexity</a> 120 </h6> 121<p> 122 Linear. <code class="computeroutput"><span class="identifier">O</span><span class="special">(</span><span class="identifier">N</span><span class="special">)</span></code> 123 where <code class="computeroutput"><span class="identifier">N</span></code> is <code class="computeroutput"><span class="identifier">distance</span><span class="special">(</span><span class="identifier">rng</span><span class="special">)</span></code>. 124 Exactly <code class="computeroutput"><span class="identifier">distance</span><span class="special">(</span><span class="identifier">rng</span><span class="special">)</span></code> 125 comparisons are performed. 126 </p> 127</div> 128<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 129<td align="left"></td> 130<td align="right"><div class="copyright-footer">Copyright © 2003-2010 Thorsten Ottosen, 131 Neil Groves<p> 132 Distributed under the Boost Software License, Version 1.0. (See accompanying 133 file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) 134 </p> 135</div></td> 136</tr></table> 137<hr> 138<div class="spirit-nav"> 139<a accesskey="p" href="unique.html"><img src="../../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../mutating.html"><img src="../../../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../../../index.html"><img src="../../../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="../non_mutating.html"><img src="../../../../../../../../doc/src/images/next.png" alt="Next"></a> 140</div> 141</body> 142</html> 143
