1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>advance</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="distance.html" title="distance"> 10<link rel="next" href="advance_c.html" title="advance_c"> 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="distance.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="advance_c.html"><img src="../../../../../../../doc/src/images/next.png" alt="Next"></a> 24</div> 25<div class="section"> 26<div class="titlepage"><div><div><h4 class="title"> 27<a name="fusion.iterator.functions.advance"></a><a class="link" href="advance.html" title="advance">advance</a> 28</h4></div></div></div> 29<h6> 30<a name="fusion.iterator.functions.advance.h0"></a> 31 <span class="phrase"><a name="fusion.iterator.functions.advance.description"></a></span><a class="link" href="advance.html#fusion.iterator.functions.advance.description">Description</a> 32 </h6> 33<p> 34 Moves an iterator by a specified distance. 35 </p> 36<h6> 37<a name="fusion.iterator.functions.advance.h1"></a> 38 <span class="phrase"><a name="fusion.iterator.functions.advance.synopsis"></a></span><a class="link" href="advance.html#fusion.iterator.functions.advance.synopsis">Synopsis</a> 39 </h6> 40<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span> 41 <span class="keyword">typename</span> <span class="identifier">M</span><span class="special">,</span> 42 <span class="keyword">typename</span> <span class="identifier">I</span> 43 <span class="special">></span> 44<span class="keyword">typename</span> <a class="link" href="../metafunctions/advance.html" title="advance"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">advance</span></code></a><span class="special"><</span><span class="identifier">I</span><span class="special">,</span> <span class="identifier">M</span><span class="special">>::</span><span class="identifier">type</span> <span class="identifier">advance</span><span class="special">(</span><span class="identifier">I</span> <span class="keyword">const</span><span class="special">&</span> <span class="identifier">i</span><span class="special">);</span> 45</pre> 46<div class="table"> 47<a name="fusion.iterator.functions.advance.t0"></a><p class="title"><b>Table 1.5. Parameters</b></p> 48<div class="table-contents"><table class="table" summary="Parameters"> 49<colgroup> 50<col> 51<col> 52<col> 53</colgroup> 54<thead><tr> 55<th> 56 <p> 57 Parameter 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> 72<tr> 73<td> 74 <p> 75 <code class="computeroutput"><span class="identifier">i</span></code> 76 </p> 77 </td> 78<td> 79 <p> 80 Model of <a class="link" href="../concepts/forward_iterator.html" title="Forward Iterator">Forward 81 Iterator</a> 82 </p> 83 </td> 84<td> 85 <p> 86 Iterator to move relative to 87 </p> 88 </td> 89</tr> 90<tr> 91<td> 92 <p> 93 <code class="computeroutput"><span class="identifier">M</span></code> 94 </p> 95 </td> 96<td> 97 <p> 98 An <a href="http://www.boost.org/libs/mpl/doc/refmanual/integral-constant.html" target="_top">MPL 99 Integral Constant</a> 100 </p> 101 </td> 102<td> 103 <p> 104 Number of positions to move 105 </p> 106 </td> 107</tr> 108</tbody> 109</table></div> 110</div> 111<br class="table-break"><h6> 112<a name="fusion.iterator.functions.advance.h2"></a> 113 <span class="phrase"><a name="fusion.iterator.functions.advance.expression_semantics"></a></span><a class="link" href="advance.html#fusion.iterator.functions.advance.expression_semantics">Expression 114 Semantics</a> 115 </h6> 116<pre class="programlisting"><a class="link" href="advance.html" title="advance"><code class="computeroutput"><span class="identifier">advance</span></code></a><span class="special"><</span><span class="identifier">M</span><span class="special">>(</span><span class="identifier">i</span><span class="special">);</span> 117</pre> 118<p> 119 <span class="bold"><strong>Return type</strong></span>: A model of the same iterator 120 concept as <code class="computeroutput"><span class="identifier">i</span></code>. 121 </p> 122<p> 123 <span class="bold"><strong>Semantics</strong></span>: Returns an iterator to the 124 element <code class="computeroutput"><span class="identifier">M</span></code> positions from 125 <code class="computeroutput"><span class="identifier">i</span></code>. If <code class="computeroutput"><span class="identifier">i</span></code> 126 is a <a class="link" href="../concepts/bidirectional_iterator.html" title="Bidirectional Iterator">Bidirectional 127 Iterator</a> then <code class="computeroutput"><span class="identifier">M</span></code> 128 may be negative. 129 </p> 130<h6> 131<a name="fusion.iterator.functions.advance.h3"></a> 132 <span class="phrase"><a name="fusion.iterator.functions.advance.header"></a></span><a class="link" href="advance.html#fusion.iterator.functions.advance.header">Header</a> 133 </h6> 134<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">iterator</span><span class="special">/</span><span class="identifier">advance</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> 135<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">advance</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> 136</pre> 137<h6> 138<a name="fusion.iterator.functions.advance.h4"></a> 139 <span class="phrase"><a name="fusion.iterator.functions.advance.example"></a></span><a class="link" href="advance.html#fusion.iterator.functions.advance.example">Example</a> 140 </h6> 141<pre class="programlisting"><span class="keyword">typedef</span> <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="keyword">int</span><span class="special">,</span><span class="keyword">int</span><span class="special">></span> <span class="identifier">vec</span><span class="special">;</span> 142 143<span class="identifier">vec</span> <span class="identifier">v</span><span class="special">(</span><span class="number">1</span><span class="special">,</span><span class="number">2</span><span class="special">,</span><span class="number">3</span><span class="special">);</span> 144<span class="identifier">assert</span><span class="special">(</span><a class="link" href="deref.html" title="deref"><code class="computeroutput"><span class="identifier">deref</span></code></a><span class="special">(</span><a class="link" href="advance.html" title="advance"><code class="computeroutput"><span class="identifier">advance</span></code></a><span class="special"><</span><span class="identifier">mpl</span><span class="special">::</span><span class="identifier">int_</span><span class="special"><</span><span class="number">2</span><span class="special">></span> <span class="special">>(</span><a class="link" href="../../sequence/intrinsic/functions/begin.html" title="begin"><code class="computeroutput"><span class="identifier">begin</span></code></a><span class="special">(</span><span class="identifier">v</span><span class="special">)))</span> <span class="special">==</span> <span class="number">3</span><span class="special">);</span> 145</pre> 146</div> 147<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 148<td align="left"></td> 149<td align="right"><div class="copyright-footer">Copyright © 2001-2006, 2011, 2012 Joel de Guzman, 150 Dan Marsden, Tobias Schwinger<p> 151 Distributed under the Boost Software License, Version 1.0. (See accompanying 152 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>) 153 </p> 154</div></td> 155</tr></table> 156<hr> 157<div class="spirit-nav"> 158<a accesskey="p" href="distance.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="advance_c.html"><img src="../../../../../../../doc/src/images/next.png" alt="Next"></a> 159</div> 160</body> 161</html> 162
