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: reverse_replace_if</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="./reverse-replace.html" class="navigation-link">Prev</a> <a href="./reverse-remove.html" class="navigation-link">Next</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./reverse-replace.html" class="navigation-link">Back</a> <a href="./reverse-remove.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="./reverse-replace-if.html" class="navigation-link">reverse_replace_if</a></td> 13</tr></table><div class="header-separator"></div> 14<div class="section" id="reverse-replace-if"> 15<h1><a class="toc-backref" href="./transformation-algorithms.html#id1502">reverse_replace_if</a></h1> 16<div class="section" id="id758"> 17<h3><a class="subsection-title" href="#synopsis" name="synopsis">Synopsis</a></h3> 18<pre class="literal-block"> 19template< 20 typename Sequence 21 , typename Pred 22 , typename In = <em>unspecified</em> 23 > 24struct <a href="./reverse-replace-if.html" class="identifier">reverse_replace_if</a> 25{ 26 typedef <em>unspecified</em> type; 27}; 28</pre> 29</div> 30<div class="section" id="id759"> 31<h3><a class="subsection-title" href="#description" name="description">Description</a></h3> 32<p>Returns a reversed copy of the original sequence where every type that satisfies 33the predicate <tt class="literal"><span class="pre">Pred</span></tt> has been replaced with <tt class="literal"><span class="pre">NewType</span></tt>.</p> 34<p>[<em>Note:</em> This wording applies to a no-inserter version(s) of the algorithm. See the 35<cite>Expression semantics</cite> subsection for a precise specification of the algorithm's 36details in all cases — <em>end note</em>]</p> 37</div> 38<div class="section" id="id760"> 39<h3><a class="subsection-title" href="#header" name="header">Header</a></h3> 40<pre class="literal-block"> 41#include <<a href="../../../../boost/mpl/replace_if.hpp" class="header">boost/mpl/replace_if.hpp</a>> 42</pre> 43</div> 44<div class="section" id="id761"> 45<h3><a class="subsection-title" href="#model-of" name="model-of">Model of</a></h3> 46<p><a class="reference internal" href="./reversible-algorithm.html">Reversible Algorithm</a></p> 47</div> 48<div class="section" id="id762"> 49<h3><a class="subsection-title" href="#parameters" name="parameters">Parameters</a></h3> 50<table border="1" class="docutils table"> 51<colgroup> 52<col width="19%" /> 53<col width="43%" /> 54<col width="38%" /> 55</colgroup> 56<thead valign="bottom"> 57<tr><th class="head">Parameter</th> 58<th class="head">Requirement</th> 59<th class="head">Description</th> 60</tr> 61</thead> 62<tbody valign="top"> 63<tr><td><tt class="literal"><span class="pre">Sequence</span></tt></td> 64<td><a class="reference internal" href="./forward-sequence.html">Forward Sequence</a></td> 65<td>An original sequence.</td> 66</tr> 67<tr><td><tt class="literal"><span class="pre">Pred</span></tt></td> 68<td>Unary <a class="reference internal" href="./lambda-expression.html">Lambda Expression</a></td> 69<td>A replacement condition.</td> 70</tr> 71<tr><td><tt class="literal"><span class="pre">NewType</span></tt></td> 72<td>Any type</td> 73<td>A type to replace with.</td> 74</tr> 75<tr><td><tt class="literal"><span class="pre">In</span></tt></td> 76<td><a class="reference internal" href="./inserter.html">Inserter</a></td> 77<td>An inserter.</td> 78</tr> 79</tbody> 80</table> 81</div> 82<div class="section" id="id763"> 83<h3><a class="subsection-title" href="#expression-semantics" name="expression-semantics">Expression semantics</a></h3> 84<p>The semantics of an expression are defined only 85where they differ from, or are not defined in <a class="reference internal" href="./reversible-algorithm.html">Reversible Algorithm</a>.</p> 86<p>For any <a class="reference internal" href="./forward-sequence.html">Forward Sequence</a> <tt class="literal"><span class="pre">s</span></tt>, an unary <a class="reference internal" href="./lambda-expression.html">Lambda Expression</a> <tt class="literal"><span class="pre">pred</span></tt>, 87an <a class="reference internal" href="./inserter.html">Inserter</a> <tt class="literal"><span class="pre">in</span></tt>, and arbitrary type <tt class="literal"><span class="pre">x</span></tt>:</p> 88<pre class="literal-block"> 89typedef <a href="./reverse-replace-if.html" class="identifier">reverse_replace_if</a><s,pred,x,in>::type r; 90</pre> 91<table class="docutils field-list" frame="void" rules="none"> 92<col class="field-name" /> 93<col class="field-body" /> 94<tbody valign="top"> 95<tr class="field"><th class="field-name">Return type:</th><td class="field-body"><p class="first">A type.</p> 96</td> 97</tr> 98<tr class="field"><th class="field-name">Semantics:</th><td class="field-body"><p class="first">Equivalent to</p> 99<pre class="last literal-block"> 100typedef <a href="./lambda.html" class="identifier">lambda</a><pred>::type p; 101typedef <a href="./reverse-transform.html" class="identifier">reverse_transform</a>< s, <a href="./if.html" class="identifier">if_</a>< apply_wrap1<p,<a href="./placeholders.html" class="identifier">_1</a>>,x,<a href="./placeholders.html" class="identifier">_1</a>>, in >::type r; 102</pre> 103</td> 104</tr> 105</tbody> 106</table> 107</div> 108<div class="section" id="id764"> 109<h3><a class="subsection-title" href="#complexity" name="complexity">Complexity</a></h3> 110<p>Linear. Performs 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">pred</span></tt>, and at most 111<tt class="literal"><span class="pre"><a href="./size.html" class="identifier">size</a><s>::value</span></tt> insertions.</p> 112</div> 113<div class="section" id="id765"> 114<h3><a class="subsection-title" href="#example" name="example">Example</a></h3> 115<pre class="literal-block"> 116typedef <a href="./vector-c.html" class="identifier">vector_c</a><int,1,4,5,2,7,5,3,5> numbers; 117typedef <a href="./vector-c.html" class="identifier">vector_c</a><int,1,4,0,2,0,0,3,0> expected; 118typedef <a href="./reverse-replace-if.html" class="identifier">reverse_replace_if</a>< 119 numbers 120 , <a href="./greater.html" class="identifier">greater</a>< _, <a href="./int.html" class="identifier">int_</a><4> > 121 , <a href="./int.html" class="identifier">int_</a><0> 122 , <a href="./front-inserter.html" class="identifier">front_inserter</a>< <a href="./vector.html" class="identifier">vector</a><> > 123 >::type result; 124 125<a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( <a href="./equal.html" class="identifier">equal</a>< result,expected, <a href="./equal-to.html" class="identifier">equal_to</a><_,_> > )); 126</pre> 127</div> 128<div class="section" id="id766"> 129<h3><a class="subsection-title" href="#see-also" name="see-also">See also</a></h3> 130<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="./replace-if.html">replace_if</a>, <a class="reference internal" href="./reverse-replace.html">reverse_replace</a>, <a class="reference internal" href="./remove-if.html">remove_if</a>, <a class="reference internal" href="./transform.html">transform</a></p> 131<!-- Algorithms/Transformation Algorithms//reverse_remove |160 --> 132</div> 133</div> 134 135<div class="footer-separator"></div> 136<table class="footer"><tr class="footer"><td class="header-group navigation-bar"><span class="navigation-group"><a href="./reverse-replace.html" class="navigation-link">Prev</a> <a href="./reverse-remove.html" class="navigation-link">Next</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./reverse-replace.html" class="navigation-link">Back</a> <a href="./reverse-remove.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> 137<td><div class="copyright-footer"><div class="copyright">Copyright © 2001-2009 Aleksey Gurtovoy and David Abrahams</div> 138Distributed under the Boost Software License, Version 1.0. (See accompanying 139file 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> 140</html> 141