1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>Random Access Iterator</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="../concepts.html" title="Concepts"> 9<link rel="prev" href="bidirectional_iterator.html" title="Bidirectional Iterator"> 10<link rel="next" href="associative_iterator.html" title="Associative Iterator"> 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="bidirectional_iterator.html"><img src="../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../concepts.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="associative_iterator.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.concepts.random_access_iterator"></a><a class="link" href="random_access_iterator.html" title="Random Access Iterator">Random 28 Access Iterator</a> 29</h4></div></div></div> 30<h6> 31<a name="fusion.iterator.concepts.random_access_iterator.h0"></a> 32 <span class="phrase"><a name="fusion.iterator.concepts.random_access_iterator.description"></a></span><a class="link" href="random_access_iterator.html#fusion.iterator.concepts.random_access_iterator.description">Description</a> 33 </h6> 34<p> 35 A Random Access Iterator traverses a <a class="link" href="../../sequence.html" title="Sequence">Sequence</a> 36 moving in either direction, permitting efficient arbitrary distance movements 37 back and forward through the sequence. 38 </p> 39<div class="variablelist"> 40<p class="title"><b>Notation</b></p> 41<dl class="variablelist"> 42<dt><span class="term"><code class="computeroutput"><span class="identifier">i</span></code>, <code class="computeroutput"><span class="identifier">j</span></code></span></dt> 43<dd><p> 44 Random Access Iterators 45 </p></dd> 46<dt><span class="term"><code class="computeroutput"><span class="identifier">I</span></code>, <code class="computeroutput"><span class="identifier">J</span></code></span></dt> 47<dd><p> 48 Random Access Iterator types 49 </p></dd> 50<dt><span class="term"><code class="computeroutput"><span class="identifier">M</span></code></span></dt> 51<dd><p> 52 An <a href="http://www.boost.org/libs/mpl" target="_top">MPL</a> integral 53 constant 54 </p></dd> 55<dt><span class="term"><code class="computeroutput"><span class="identifier">N</span></code></span></dt> 56<dd><p> 57 An integral constant 58 </p></dd> 59</dl> 60</div> 61<h6> 62<a name="fusion.iterator.concepts.random_access_iterator.h1"></a> 63 <span class="phrase"><a name="fusion.iterator.concepts.random_access_iterator.refinement_of"></a></span><a class="link" href="random_access_iterator.html#fusion.iterator.concepts.random_access_iterator.refinement_of">Refinement 64 of</a> 65 </h6> 66<p> 67 <a class="link" href="bidirectional_iterator.html" title="Bidirectional Iterator">Bidirectional 68 Iterator</a> 69 </p> 70<h6> 71<a name="fusion.iterator.concepts.random_access_iterator.h2"></a> 72 <span class="phrase"><a name="fusion.iterator.concepts.random_access_iterator.expression_requirements"></a></span><a class="link" href="random_access_iterator.html#fusion.iterator.concepts.random_access_iterator.expression_requirements">Expression 73 requirements</a> 74 </h6> 75<p> 76 In addition to the requirements defined in <a class="link" href="bidirectional_iterator.html" title="Bidirectional Iterator">Bidirectional 77 Iterator</a>, the following expressions must be valid: 78 </p> 79<div class="informaltable"><table class="table"> 80<colgroup> 81<col> 82<col> 83<col> 84</colgroup> 85<thead><tr> 86<th> 87 <p> 88 Expression 89 </p> 90 </th> 91<th> 92 <p> 93 Return type 94 </p> 95 </th> 96<th> 97 <p> 98 Runtime Complexity 99 </p> 100 </th> 101</tr></thead> 102<tbody> 103<tr> 104<td> 105 <p> 106 <code class="computeroutput"><a class="link" href="../functions/next.html" title="next"><code class="computeroutput"><span class="identifier">next</span></code></a><span class="special">(</span><span class="identifier">i</span><span class="special">)</span></code> 107 </p> 108 </td> 109<td> 110 <p> 111 <a class="link" href="random_access_iterator.html" title="Random Access Iterator">Random 112 Access Iterator</a> 113 </p> 114 </td> 115<td> 116 <p> 117 Constant 118 </p> 119 </td> 120</tr> 121<tr> 122<td> 123 <p> 124 <code class="computeroutput"><a class="link" href="../functions/prior.html" title="prior"><code class="computeroutput"><span class="identifier">prior</span></code></a><span class="special">(</span><span class="identifier">i</span><span class="special">)</span></code> 125 </p> 126 </td> 127<td> 128 <p> 129 <a class="link" href="random_access_iterator.html" title="Random Access Iterator">Random 130 Access Iterator</a> 131 </p> 132 </td> 133<td> 134 <p> 135 Constant 136 </p> 137 </td> 138</tr> 139<tr> 140<td> 141 <p> 142 <code class="computeroutput"><a class="link" href="../functions/advance_c.html" title="advance_c"><code class="computeroutput"><span class="identifier">advance_c</span></code></a><span class="special"><</span><span class="identifier">N</span><span class="special">>(</span><span class="identifier">i</span><span class="special">)</span></code> 143 </p> 144 </td> 145<td> 146 <p> 147 <a class="link" href="random_access_iterator.html" title="Random Access Iterator">Random 148 Access Iterator</a> 149 </p> 150 </td> 151<td> 152 <p> 153 Constant 154 </p> 155 </td> 156</tr> 157<tr> 158<td> 159 <p> 160 <code class="computeroutput"><a class="link" href="../functions/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></code> 161 </p> 162 </td> 163<td> 164 <p> 165 <a class="link" href="random_access_iterator.html" title="Random Access Iterator">Random 166 Access Iterator</a> 167 </p> 168 </td> 169<td> 170 <p> 171 Constant 172 </p> 173 </td> 174</tr> 175</tbody> 176</table></div> 177<h6> 178<a name="fusion.iterator.concepts.random_access_iterator.h3"></a> 179 <span class="phrase"><a name="fusion.iterator.concepts.random_access_iterator.meta_expressions"></a></span><a class="link" href="random_access_iterator.html#fusion.iterator.concepts.random_access_iterator.meta_expressions">Meta 180 Expressions</a> 181 </h6> 182<div class="informaltable"><table class="table"> 183<colgroup> 184<col> 185<col> 186</colgroup> 187<thead><tr> 188<th> 189 <p> 190 Expression 191 </p> 192 </th> 193<th> 194 <p> 195 Compile Time Complexity 196 </p> 197 </th> 198</tr></thead> 199<tbody> 200<tr> 201<td> 202 <p> 203 <code class="computeroutput"><a class="link" href="../metafunctions/advance_c.html" title="advance_c"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">advance_c</span></code></a><span class="special"><</span><span class="identifier">I</span><span class="special">,</span> 204 <span class="identifier">N</span><span class="special">>::</span><span class="identifier">type</span></code> 205 </p> 206 </td> 207<td> 208 <p> 209 Amortized constant time 210 </p> 211 </td> 212</tr> 213<tr> 214<td> 215 <p> 216 <code class="computeroutput"><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> 217 <span class="identifier">M</span><span class="special">>::</span><span class="identifier">type</span></code> 218 </p> 219 </td> 220<td> 221 <p> 222 Amortized constant time 223 </p> 224 </td> 225</tr> 226<tr> 227<td> 228 <p> 229 <code class="computeroutput"><a class="link" href="../metafunctions/distance.html" title="distance"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">distance</span></code></a><span class="special"><</span><span class="identifier">I</span> <span class="special">,</span><span class="identifier">J</span><span class="special">>::</span><span class="identifier">type</span></code> 230 </p> 231 </td> 232<td> 233 <p> 234 Amortized constant time 235 </p> 236 </td> 237</tr> 238</tbody> 239</table></div> 240<h6> 241<a name="fusion.iterator.concepts.random_access_iterator.h4"></a> 242 <span class="phrase"><a name="fusion.iterator.concepts.random_access_iterator.models"></a></span><a class="link" href="random_access_iterator.html#fusion.iterator.concepts.random_access_iterator.models">Models</a> 243 </h6> 244<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> 245<li class="listitem"> 246 <a class="link" href="../../container/vector.html" title="vector"><code class="computeroutput"><span class="identifier">vector</span></code></a> 247 iterator 248 </li> 249<li class="listitem"> 250 <a class="link" href="../../container/map.html" title="map"><code class="computeroutput"><span class="identifier">map</span></code></a> 251 iterator 252 </li> 253<li class="listitem"> 254 <a class="link" href="../../adapted/std__pair.html" title="std::pair"><code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">pair</span></code></a> 255 iterator 256 </li> 257<li class="listitem"> 258 <a class="link" href="../../adapted/boost__array.html" title="boost::array"><code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">array</span></code></a> 259 iterator 260 </li> 261<li class="listitem"> 262 <a class="link" href="../../view/single_view.html" title="single_view"><code class="computeroutput"><span class="identifier">single_view</span></code></a> 263 iterator 264 </li> 265<li class="listitem"> 266 <a class="link" href="../../view/iterator_range.html" title="iterator_range"><code class="computeroutput"><span class="identifier">iterator_range</span></code></a> 267 iterator (where adapted sequence is a <a class="link" href="../../sequence/concepts/random_access_sequence.html" title="Random Access Sequence">Random 268 Access Sequence</a>) 269 </li> 270<li class="listitem"> 271 <a class="link" href="../../view/transform_view.html" title="transform_view"><code class="computeroutput"><span class="identifier">transform_view</span></code></a> 272 iterator (where adapted sequence is a <a class="link" href="../../sequence/concepts/random_access_sequence.html" title="Random Access Sequence">Random 273 Access Sequence</a>) 274 </li> 275<li class="listitem"> 276 <a class="link" href="../../view/reverse_view.html" title="reverse_view"><code class="computeroutput"><span class="identifier">reverse_view</span></code></a> 277 iterator (where adapted sequence is a <a class="link" href="../../sequence/concepts/random_access_sequence.html" title="Random Access Sequence">Random 278 Access Sequence</a>) 279 </li> 280</ul></div> 281</div> 282<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 283<td align="left"></td> 284<td align="right"><div class="copyright-footer">Copyright © 2001-2006, 2011, 2012 Joel de Guzman, 285 Dan Marsden, Tobias Schwinger<p> 286 Distributed under the Boost Software License, Version 1.0. (See accompanying 287 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>) 288 </p> 289</div></td> 290</tr></table> 291<hr> 292<div class="spirit-nav"> 293<a accesskey="p" href="bidirectional_iterator.html"><img src="../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../concepts.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="associative_iterator.html"><img src="../../../../../../../doc/src/images/next.png" alt="Next"></a> 294</div> 295</body> 296</html> 297
