1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>stable_partition</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="sort.html" title="sort"> 10<link rel="next" href="stable_sort.html" title="stable_sort"> 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="sort.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="stable_sort.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.stable_partition"></a><a class="link" href="stable_partition.html" title="stable_partition">stable_partition</a> 28</h5></div></div></div> 29<h6> 30<a name="range.reference.algorithms.mutating.stable_partition.h0"></a> 31 <span class="phrase"><a name="range.reference.algorithms.mutating.stable_partition.prototype"></a></span><a class="link" href="stable_partition.html#range.reference.algorithms.mutating.stable_partition.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">ForwardRange</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">UnaryPredicate</span><span class="special">></span> 36<span class="keyword">typename</span> <span class="identifier">range_iterator</span><span class="special"><</span><span class="identifier">ForwardRange</span><span class="special">>::</span><span class="identifier">type</span> 37<span class="identifier">stable_partition</span><span class="special">(</span><span class="identifier">ForwardRange</span><span class="special">&</span> <span class="identifier">rng</span><span class="special">,</span> <span class="identifier">UnaryPredicate</span> <span class="identifier">pred</span><span class="special">);</span> 38 39<span class="keyword">template</span><span class="special"><</span><span class="keyword">class</span> <span class="identifier">ForwardRange</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">UnaryPredicate</span><span class="special">></span> 40<span class="keyword">typename</span> <span class="identifier">range_iterator</span><span class="special"><</span><span class="keyword">const</span> <span class="identifier">ForwardRange</span><span class="special">>::</span><span class="identifier">type</span> 41<span class="identifier">stable_partition</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">ForwardRange</span><span class="special">&</span> <span class="identifier">rng</span><span class="special">,</span> <span class="identifier">UnaryPredicate</span> <span class="identifier">pred</span><span class="special">);</span> 42 43<span class="keyword">template</span><span class="special"><</span> 44 <span class="identifier">range_return_value</span> <span class="identifier">re</span><span class="special">,</span> 45 <span class="keyword">class</span> <span class="identifier">ForwardRange</span><span class="special">,</span> 46 <span class="keyword">class</span> <span class="identifier">UnaryPredicate</span> 47<span class="special">></span> 48<span class="keyword">typename</span> <span class="identifier">range_return</span><span class="special"><</span><span class="identifier">ForwardRange</span><span class="special">,</span> <span class="identifier">re</span><span class="special">>::</span><span class="identifier">type</span> 49<span class="identifier">stable_partition</span><span class="special">(</span><span class="identifier">ForwardRange</span><span class="special">&</span> <span class="identifier">rng</span><span class="special">,</span> <span class="identifier">UnaryPredicate</span> <span class="identifier">pred</span><span class="special">);</span> 50 51<span class="keyword">template</span><span class="special"><</span> 52 <span class="identifier">range_return_value</span> <span class="identifier">re</span><span class="special">,</span> 53 <span class="keyword">class</span> <span class="identifier">ForwardRange</span><span class="special">,</span> 54 <span class="keyword">class</span> <span class="identifier">UnaryPredicate</span> 55<span class="special">></span> 56<span class="keyword">typename</span> <span class="identifier">range_return</span><span class="special"><</span><span class="keyword">const</span> <span class="identifier">ForwardRange</span><span class="special">,</span> <span class="identifier">re</span><span class="special">>::</span><span class="identifier">type</span> 57<span class="identifier">stable_partition</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">ForwardRange</span><span class="special">&</span> <span class="identifier">rng</span><span class="special">,</span> <span class="identifier">UnaryPredicate</span> <span class="identifier">pred</span><span class="special">);</span> 58</pre> 59<p> 60 </p> 61<h6> 62<a name="range.reference.algorithms.mutating.stable_partition.h1"></a> 63 <span class="phrase"><a name="range.reference.algorithms.mutating.stable_partition.description"></a></span><a class="link" href="stable_partition.html#range.reference.algorithms.mutating.stable_partition.description">Description</a> 64 </h6> 65<p> 66 <code class="computeroutput"><span class="identifier">stable_partition</span></code> reorders 67 the elements in the range <code class="computeroutput"><span class="identifier">rng</span></code> 68 base on the function object <code class="computeroutput"><span class="identifier">pred</span></code>. 69 Once this function has completed all of the elements that satisfy <code class="computeroutput"><span class="identifier">pred</span></code> appear before all of the elements 70 that fail to satisfy it. <code class="computeroutput"><span class="identifier">stable_partition</span></code> 71 differs from <code class="computeroutput"><span class="identifier">partition</span></code> 72 because it preserves relative order. It is stable. 73 </p> 74<p> 75 For the versions that return an iterator, the return value is the iterator 76 to the first element that fails to satisfy <code class="computeroutput"><span class="identifier">pred</span></code>. 77 </p> 78<p> 79 For versions that return a <code class="computeroutput"><span class="identifier">range_return</span></code>, 80 the <code class="computeroutput"><span class="identifier">found</span></code> iterator is 81 the iterator to the first element that fails to satisfy <code class="computeroutput"><span class="identifier">pred</span></code>. 82 </p> 83<h6> 84<a name="range.reference.algorithms.mutating.stable_partition.h2"></a> 85 <span class="phrase"><a name="range.reference.algorithms.mutating.stable_partition.definition"></a></span><a class="link" href="stable_partition.html#range.reference.algorithms.mutating.stable_partition.definition">Definition</a> 86 </h6> 87<p> 88 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">stable_partition</span><span class="special">.</span><span class="identifier">hpp</span></code> 89 </p> 90<h6> 91<a name="range.reference.algorithms.mutating.stable_partition.h3"></a> 92 <span class="phrase"><a name="range.reference.algorithms.mutating.stable_partition.requirements"></a></span><a class="link" href="stable_partition.html#range.reference.algorithms.mutating.stable_partition.requirements">Requirements</a> 93 </h6> 94<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> 95<li class="listitem"> 96 <code class="computeroutput"><span class="identifier">ForwardRange</span></code> is a 97 model of the <a class="link" href="../../../concepts/forward_range.html" title="Forward Range">Forward 98 Range</a> Concept. 99 </li> 100<li class="listitem"> 101 <code class="computeroutput"><span class="identifier">ForwardRange</span></code> is mutable. 102 </li> 103<li class="listitem"> 104 <code class="computeroutput"><span class="identifier">UnaryPredicate</span></code> is 105 a model of the <code class="computeroutput"><span class="identifier">PredicateConcept</span></code>. 106 </li> 107</ul></div> 108<h6> 109<a name="range.reference.algorithms.mutating.stable_partition.h4"></a> 110 <span class="phrase"><a name="range.reference.algorithms.mutating.stable_partition.complexity"></a></span><a class="link" href="stable_partition.html#range.reference.algorithms.mutating.stable_partition.complexity">Complexity</a> 111 </h6> 112<p> 113 Best case: <code class="computeroutput"><span class="identifier">O</span><span class="special">(</span><span class="identifier">N</span><span class="special">)</span></code> 114 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>. 115 Worst case: <code class="computeroutput"><span class="identifier">N</span> <span class="special">*</span> 116 <span class="identifier">log</span><span class="special">(</span><span class="identifier">N</span><span class="special">)</span></code> 117 swaps, 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>. 118 </p> 119</div> 120<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 121<td align="left"></td> 122<td align="right"><div class="copyright-footer">Copyright © 2003-2010 Thorsten Ottosen, 123 Neil Groves<p> 124 Distributed under the Boost Software License, Version 1.0. (See accompanying 125 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>) 126 </p> 127</div></td> 128</tr></table> 129<hr> 130<div class="spirit-nav"> 131<a accesskey="p" href="sort.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="stable_sort.html"><img src="../../../../../../../../doc/src/images/next.png" alt="Next"></a> 132</div> 133</body> 134</html> 135
