1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>replace_if</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="replace_copy_if.html" title="replace_copy_if"> 10<link rel="next" href="reverse.html" title="reverse"> 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="replace_copy_if.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="reverse.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.replace_if"></a><a class="link" href="replace_if.html" title="replace_if">replace_if</a> 28</h5></div></div></div> 29<h6> 30<a name="range.reference.algorithms.mutating.replace_if.h0"></a> 31 <span class="phrase"><a name="range.reference.algorithms.mutating.replace_if.prototype"></a></span><a class="link" href="replace_if.html#range.reference.algorithms.mutating.replace_if.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> <span class="keyword">class</span> <span class="identifier">Value</span><span class="special">></span> 36<span class="identifier">ForwardRange</span><span class="special">&</span> <span class="identifier">replace_if</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> <span class="keyword">const</span> <span class="identifier">Value</span><span class="special">&</span> <span class="identifier">with_what</span><span class="special">);</span> 37 38<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> <span class="keyword">class</span> <span class="identifier">Value</span><span class="special">></span> 39<span class="keyword">const</span> <span class="identifier">ForwardRange</span><span class="special">&</span> <span class="identifier">replace_if</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> <span class="keyword">const</span> <span class="identifier">Value</span><span class="special">&</span> <span class="identifier">with_what</span><span class="special">);</span> 40</pre> 41<p> 42 </p> 43<h6> 44<a name="range.reference.algorithms.mutating.replace_if.h1"></a> 45 <span class="phrase"><a name="range.reference.algorithms.mutating.replace_if.description"></a></span><a class="link" href="replace_if.html#range.reference.algorithms.mutating.replace_if.description">Description</a> 46 </h6> 47<p> 48 <code class="computeroutput"><span class="identifier">replace_if</span></code> replaces every 49 element <code class="computeroutput"><span class="identifier">x</span></code> in <code class="computeroutput"><span class="identifier">rng</span></code> for which <code class="computeroutput"><span class="identifier">pred</span><span class="special">(</span><span class="identifier">x</span><span class="special">)</span> <span class="special">==</span> <span class="keyword">true</span></code> with <code class="computeroutput"><span class="identifier">with_what</span></code>. 50 Returns a reference to <code class="computeroutput"><span class="identifier">rng</span></code>. 51 </p> 52<h6> 53<a name="range.reference.algorithms.mutating.replace_if.h2"></a> 54 <span class="phrase"><a name="range.reference.algorithms.mutating.replace_if.definition"></a></span><a class="link" href="replace_if.html#range.reference.algorithms.mutating.replace_if.definition">Definition</a> 55 </h6> 56<p> 57 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">replace_if</span><span class="special">.</span><span class="identifier">hpp</span></code> 58 </p> 59<h6> 60<a name="range.reference.algorithms.mutating.replace_if.h3"></a> 61 <span class="phrase"><a name="range.reference.algorithms.mutating.replace_if.requirements"></a></span><a class="link" href="replace_if.html#range.reference.algorithms.mutating.replace_if.requirements">Requirements</a> 62 </h6> 63<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> 64<li class="listitem"> 65 <code class="computeroutput"><span class="identifier">ForwardRange</span></code> is a 66 model of the <a class="link" href="../../../concepts/forward_range.html" title="Forward Range">Forward 67 Range</a> Concept. 68 </li> 69<li class="listitem"> 70 <code class="computeroutput"><span class="identifier">ForwardRange</span></code> is mutable. 71 </li> 72<li class="listitem"> 73 <code class="computeroutput"><span class="identifier">UnaryPredicate</span></code> is 74 a model of the <code class="computeroutput"><span class="identifier">PredicateConcept</span></code> 75 </li> 76<li class="listitem"> 77 <code class="computeroutput"><span class="identifier">ForwardRange</span></code>'s value 78 type is convertible to <code class="computeroutput"><span class="identifier">UnaryPredicate</span></code>'s 79 argument type. 80 </li> 81<li class="listitem"> 82 <code class="computeroutput"><span class="identifier">Value</span></code> is convertible 83 to <code class="computeroutput"><span class="identifier">ForwardRange</span></code>'s 84 value type. 85 </li> 86<li class="listitem"> 87 <code class="computeroutput"><span class="identifier">Value</span></code> is a model 88 of the <code class="computeroutput"><span class="identifier">AssignableConcept</span></code>. 89 </li> 90</ul></div> 91<h6> 92<a name="range.reference.algorithms.mutating.replace_if.h4"></a> 93 <span class="phrase"><a name="range.reference.algorithms.mutating.replace_if.complexity"></a></span><a class="link" href="replace_if.html#range.reference.algorithms.mutating.replace_if.complexity">Complexity</a> 94 </h6> 95<p> 96 Linear. <code class="computeroutput"><span class="identifier">replace_if</span></code> performs 97 exactly <code class="computeroutput"><span class="identifier">distance</span><span class="special">(</span><span class="identifier">rng</span><span class="special">)</span></code> 98 applications of <code class="computeroutput"><span class="identifier">pred</span></code>, 99 and at most <code class="computeroutput"><span class="identifier">distance</span><span class="special">(</span><span class="identifier">rng</span><span class="special">)</span></code> assignments. 100 </p> 101</div> 102<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 103<td align="left"></td> 104<td align="right"><div class="copyright-footer">Copyright © 2003-2010 Thorsten Ottosen, 105 Neil Groves<p> 106 Distributed under the Boost Software License, Version 1.0. (See accompanying 107 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>) 108 </p> 109</div></td> 110</tr></table> 111<hr> 112<div class="spirit-nav"> 113<a accesskey="p" href="replace_copy_if.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="reverse.html"><img src="../../../../../../../../doc/src/images/next.png" alt="Next"></a> 114</div> 115</body> 116</html> 117
