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 0.5: http://docutils.sourceforge.net/" /> 7<title>Incrementable Iterator Concept</title> 8<link rel="stylesheet" href="../../../rst.css" type="text/css" /> 9</head> 10<body> 11<div class="document" id="incrementable-iterator-concept"> 12<h1 class="title">Incrementable Iterator Concept</h1> 13 14<!-- Copyright David Abrahams 2006. Distributed under the Boost --> 15<!-- Software License, Version 1.0. (See accompanying --> 16<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) --> 17<p>A class or built-in type <tt class="docutils literal"><span class="pre">X</span></tt> models the <em>Incrementable Iterator</em> 18concept if, in addition to <tt class="docutils literal"><span class="pre">X</span></tt> being Assignable and Copy 19Constructible, the following expressions are valid and respect the 20stated semantics.</p> 21<table border="1" class="docutils"> 22<colgroup> 23<col width="39%" /> 24<col width="37%" /> 25<col width="24%" /> 26</colgroup> 27<thead valign="bottom"> 28<tr><th class="head" colspan="3">Incrementable Iterator Requirements (in addition to Assignable, Copy Constructible)</th> 29</tr> 30<tr><th class="head">Expression</th> 31<th class="head">Return Type</th> 32<th class="head">Assertion/Semantics</th> 33</tr> 34</thead> 35<tbody valign="top"> 36<tr><td><tt class="docutils literal"><span class="pre">++r</span></tt></td> 37<td><tt class="docutils literal"><span class="pre">X&</span></tt></td> 38<td><tt class="docutils literal"><span class="pre">&r</span> <span class="pre">==</span> <span class="pre">&++r</span></tt></td> 39</tr> 40<tr><td><tt class="docutils literal"><span class="pre">r++</span></tt></td> 41<td><tt class="docutils literal"><span class="pre">X</span></tt></td> 42<td><pre class="first last literal-block"> 43{ 44 X tmp = r; 45 ++r; 46 return tmp; 47} 48</pre> 49</td> 50</tr> 51<tr><td><tt class="docutils literal"><span class="pre">iterator_traversal<X>::type</span></tt></td> 52<td>Convertible to 53<tt class="docutils literal"><span class="pre">incrementable_traversal_tag</span></tt></td> 54<td> </td> 55</tr> 56</tbody> 57</table> 58</div> 59<div class="footer"> 60<hr class="footer" /> 61<a class="reference external" href="IncrementableIterator.rst">View document source</a>. 62Generated by <a class="reference external" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference external" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source. 63 64</div> 65</body> 66</html> 67