1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>Concept Checking</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. Boost.Iterator"> 8<link rel="up" href="../utilities.html" title="Utilities"> 9<link rel="prev" href="../utilities.html" title="Utilities"> 10<link rel="next" href="iterator_traits.html" title="Iterator Traits"> 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="../utilities.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../utilities.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="iterator_traits.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a> 24</div> 25<div class="section"> 26<div class="titlepage"><div><div><h3 class="title"> 27<a name="iterator.utilities.concept_checking"></a><a class="link" href="concept_checking.html" title="Concept Checking">Concept Checking</a> 28</h3></div></div></div> 29<p> 30 The iterator concept checking classes provide a mechanism for a template 31 to report better error messages when a user instantiates the template with 32 a type that does not meet the requirements of the template. For an introduction 33 to using concept checking classes, see the documentation for the <a href="../../../../../concept_check/index.html" target="_top">Boost.ConceptCheck</a> 34 library. 35 </p> 36<h3> 37<a name="iterator.utilities.concept_checking.h0"></a> 38 <span class="phrase"><a name="iterator.utilities.concept_checking.iterator_concepts_hpp_synopsis"></a></span><a class="link" href="concept_checking.html#iterator.utilities.concept_checking.iterator_concepts_hpp_synopsis"><code class="computeroutput"><span class="identifier">iterator_concepts</span><span class="special">.</span><span class="identifier">hpp</span></code> Synopsis</a> 39 </h3> 40<pre class="programlisting"><span class="keyword">namespace</span> <span class="identifier">boost_concepts</span> <span class="special">{</span> 41 42 <span class="comment">// Iterator Access Concepts</span> 43 44 <span class="keyword">template</span> <span class="special"><</span><span class="keyword">typename</span> <span class="identifier">Iterator</span><span class="special">></span> 45 <span class="keyword">class</span> <span class="identifier">ReadableIteratorConcept</span><span class="special">;</span> 46 47 <span class="keyword">template</span> <span class="special"><</span> 48 <span class="keyword">typename</span> <span class="identifier">Iterator</span> 49 <span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">ValueType</span> <span class="special">=</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">iterator_traits</span><span class="special"><</span><span class="identifier">Iterator</span><span class="special">>::</span><span class="identifier">value_type</span> 50 <span class="special">></span> 51 <span class="keyword">class</span> <span class="identifier">WritableIteratorConcept</span><span class="special">;</span> 52 53 <span class="keyword">template</span> <span class="special"><</span><span class="keyword">typename</span> <span class="identifier">Iterator</span><span class="special">></span> 54 <span class="keyword">class</span> <span class="identifier">SwappableIteratorConcept</span><span class="special">;</span> 55 56 <span class="keyword">template</span> <span class="special"><</span><span class="keyword">typename</span> <span class="identifier">Iterator</span><span class="special">></span> 57 <span class="keyword">class</span> <span class="identifier">LvalueIteratorConcept</span><span class="special">;</span> 58 59 <span class="comment">// Iterator Traversal Concepts</span> 60 61 <span class="keyword">template</span> <span class="special"><</span><span class="keyword">typename</span> <span class="identifier">Iterator</span><span class="special">></span> 62 <span class="keyword">class</span> <span class="identifier">IncrementableIteratorConcept</span><span class="special">;</span> 63 64 <span class="keyword">template</span> <span class="special"><</span><span class="keyword">typename</span> <span class="identifier">Iterator</span><span class="special">></span> 65 <span class="keyword">class</span> <span class="identifier">SinglePassIteratorConcept</span><span class="special">;</span> 66 67 <span class="keyword">template</span> <span class="special"><</span><span class="keyword">typename</span> <span class="identifier">Iterator</span><span class="special">></span> 68 <span class="keyword">class</span> <span class="identifier">ForwardTraversalConcept</span><span class="special">;</span> 69 70 <span class="keyword">template</span> <span class="special"><</span><span class="keyword">typename</span> <span class="identifier">Iterator</span><span class="special">></span> 71 <span class="keyword">class</span> <span class="identifier">BidirectionalTraversalConcept</span><span class="special">;</span> 72 73 <span class="keyword">template</span> <span class="special"><</span><span class="keyword">typename</span> <span class="identifier">Iterator</span><span class="special">></span> 74 <span class="keyword">class</span> <span class="identifier">RandomAccessTraversalConcept</span><span class="special">;</span> 75 76 <span class="comment">// Interoperability</span> 77 78 <span class="keyword">template</span> <span class="special"><</span><span class="keyword">typename</span> <span class="identifier">Iterator</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">ConstIterator</span><span class="special">></span> 79 <span class="keyword">class</span> <span class="identifier">InteroperableIteratorConcept</span><span class="special">;</span> 80 81<span class="special">}</span> 82</pre> 83</div> 84<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 85<td align="left"></td> 86<td align="right"><div class="copyright-footer">Copyright © 2003, 2005 David Abrahams Jeremy Siek Thomas 87 Witt<p> 88 Distributed under the Boost Software License, Version 1.0. (See accompanying 89 file LICENSE_1_0.txt or copy at <ulink url="http://www.boost.org/LICENSE_1_0.txt"> 90 http://www.boost.org/LICENSE_1_0.txt </ulink>) 91 </p> 92</div></td> 93</tr></table> 94<hr> 95<div class="spirit-nav"> 96<a accesskey="p" href="../utilities.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../utilities.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="iterator_traits.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a> 97</div> 98</body> 99</html> 100
