1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>swap</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. Fusion 2.2"> 8<link rel="up" href="../functions.html" title="Functions"> 9<link rel="prev" href="at_key.html" title="at_key"> 10<link rel="next" href="../metafunctions.html" title="Metafunctions"> 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="at_key.html"><img src="../../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../functions.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="../metafunctions.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="fusion.sequence.intrinsic.functions.swap"></a><a class="link" href="swap.html" title="swap">swap</a> 28</h5></div></div></div> 29<h6> 30<a name="fusion.sequence.intrinsic.functions.swap.h0"></a> 31 <span class="phrase"><a name="fusion.sequence.intrinsic.functions.swap.description"></a></span><a class="link" href="swap.html#fusion.sequence.intrinsic.functions.swap.description">Description</a> 32 </h6> 33<p> 34 Performs an element by element swap of the elements in 2 sequences. 35 </p> 36<h6> 37<a name="fusion.sequence.intrinsic.functions.swap.h1"></a> 38 <span class="phrase"><a name="fusion.sequence.intrinsic.functions.swap.synopsis"></a></span><a class="link" href="swap.html#fusion.sequence.intrinsic.functions.swap.synopsis">Synopsis</a> 39 </h6> 40<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> <span class="identifier">Seq1</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">Seq2</span><span class="special">></span> 41<span class="keyword">typename</span> <a class="link" href="../metafunctions/swap.html" title="swap"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">swap</span></code></a><span class="special"><</span><span class="identifier">Seq1</span><span class="special">,</span> <span class="identifier">Seq2</span><span class="special">>::</span><span class="identifier">type</span> 42<span class="identifier">swap</span><span class="special">(</span><span class="identifier">Seq1</span><span class="special">&</span> <span class="identifier">seq1</span><span class="special">,</span> <span class="identifier">Seq2</span><span class="special">&</span> <span class="identifier">seq2</span><span class="special">);</span> 43</pre> 44<h6> 45<a name="fusion.sequence.intrinsic.functions.swap.h2"></a> 46 <span class="phrase"><a name="fusion.sequence.intrinsic.functions.swap.parameters"></a></span><a class="link" href="swap.html#fusion.sequence.intrinsic.functions.swap.parameters">Parameters</a> 47 </h6> 48<div class="informaltable"><table class="table"> 49<colgroup> 50<col> 51<col> 52<col> 53</colgroup> 54<thead><tr> 55<th> 56 <p> 57 Parameters 58 </p> 59 </th> 60<th> 61 <p> 62 Requirement 63 </p> 64 </th> 65<th> 66 <p> 67 Description 68 </p> 69 </th> 70</tr></thead> 71<tbody><tr> 72<td> 73 <p> 74 <code class="computeroutput"><span class="identifier">seq1</span></code>, <code class="computeroutput"><span class="identifier">seq2</span></code> 75 </p> 76 </td> 77<td> 78 <p> 79 Models of <a class="link" href="../../concepts/forward_sequence.html" title="Forward Sequence">Forward 80 Sequence</a> 81 </p> 82 </td> 83<td> 84 <p> 85 The sequences whose elements we wish to swap. 86 </p> 87 </td> 88</tr></tbody> 89</table></div> 90<h6> 91<a name="fusion.sequence.intrinsic.functions.swap.h3"></a> 92 <span class="phrase"><a name="fusion.sequence.intrinsic.functions.swap.expression_semantics"></a></span><a class="link" href="swap.html#fusion.sequence.intrinsic.functions.swap.expression_semantics">Expression 93 Semantics</a> 94 </h6> 95<pre class="programlisting"><span class="identifier">swap</span><span class="special">(</span><span class="identifier">seq1</span><span class="special">,</span> <span class="identifier">seq2</span><span class="special">);</span> 96</pre> 97<p> 98 <span class="bold"><strong>Return type</strong></span>: <code class="computeroutput"><span class="keyword">void</span></code> 99 </p> 100<p> 101 <span class="bold"><strong>Precondition</strong></span>: <code class="computeroutput"><a class="link" href="size.html" title="size"><code class="computeroutput"><span class="identifier">size</span></code></a><span class="special">(</span><span class="identifier">seq1</span><span class="special">)</span> <span class="special">==</span> <a class="link" href="size.html" title="size"><code class="computeroutput"><span class="identifier">size</span></code></a><span class="special">(</span><span class="identifier">seq2</span><span class="special">)</span></code> 102 </p> 103<p> 104 <span class="bold"><strong>Semantics</strong></span>: Calls <code class="computeroutput"><span class="identifier">swap</span><span class="special">(</span><span class="identifier">a1</span><span class="special">,</span> <span class="identifier">b1</span><span class="special">)</span></code> for corresponding elements in <code class="computeroutput"><span class="identifier">seq1</span></code> and <code class="computeroutput"><span class="identifier">seq2</span></code>. 105 </p> 106<h6> 107<a name="fusion.sequence.intrinsic.functions.swap.h4"></a> 108 <span class="phrase"><a name="fusion.sequence.intrinsic.functions.swap.header"></a></span><a class="link" href="swap.html#fusion.sequence.intrinsic.functions.swap.header">Header</a> 109 </h6> 110<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">fusion</span><span class="special">/</span><span class="identifier">sequence</span><span class="special">/</span><span class="identifier">intrinsic</span><span class="special">/</span><span class="identifier">swap</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> 111<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">fusion</span><span class="special">/</span><span class="identifier">include</span><span class="special">/</span><span class="identifier">swap</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> 112</pre> 113<h6> 114<a name="fusion.sequence.intrinsic.functions.swap.h5"></a> 115 <span class="phrase"><a name="fusion.sequence.intrinsic.functions.swap.example"></a></span><a class="link" href="swap.html#fusion.sequence.intrinsic.functions.swap.example">Example</a> 116 </h6> 117<pre class="programlisting"><a class="link" href="../../../container/vector.html" title="vector"><code class="computeroutput"><span class="identifier">vector</span></code></a><span class="special"><</span><span class="keyword">int</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">></span> <span class="identifier">v1</span><span class="special">(</span><span class="number">1</span><span class="special">,</span> <span class="string">"hello"</span><span class="special">),</span> <span class="identifier">v2</span><span class="special">(</span><span class="number">2</span><span class="special">,</span> <span class="string">"world"</span><span class="special">);</span> 118<span class="identifier">swap</span><span class="special">(</span><span class="identifier">v1</span><span class="special">,</span> <span class="identifier">v2</span><span class="special">);</span> 119<span class="identifier">assert</span><span class="special">(</span><span class="identifier">v1</span> <span class="special">==</span> <a class="link" href="../../../container/generation/functions/make_vector.html" title="make_vector"><code class="computeroutput"><span class="identifier">make_vector</span></code></a><span class="special">(</span><span class="number">2</span><span class="special">,</span> <span class="string">"world"</span><span class="special">));</span> 120<span class="identifier">assert</span><span class="special">(</span><span class="identifier">v2</span> <span class="special">==</span> <a class="link" href="../../../container/generation/functions/make_vector.html" title="make_vector"><code class="computeroutput"><span class="identifier">make_vector</span></code></a><span class="special">(</span><span class="number">1</span><span class="special">,</span> <span class="string">"hello"</span><span class="special">));</span> 121</pre> 122</div> 123<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 124<td align="left"></td> 125<td align="right"><div class="copyright-footer">Copyright © 2001-2006, 2011, 2012 Joel de Guzman, 126 Dan Marsden, Tobias Schwinger<p> 127 Distributed under the Boost Software License, Version 1.0. (See accompanying 128 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>) 129 </p> 130</div></td> 131</tr></table> 132<hr> 133<div class="spirit-nav"> 134<a accesskey="p" href="at_key.html"><img src="../../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../functions.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="../metafunctions.html"><img src="../../../../../../../../doc/src/images/next.png" alt="Next"></a> 135</div> 136</body> 137</html> 138
