blob: 5bff537c58aff11ea3e6d65cf1e03c0ad27dfeba (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
|
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>Concept Checking</title>
<link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.76.1">
<link rel="home" href="../../index.html" title="Chapter 1. Range 2.0">
<link rel="up" href="../concepts.html" title="Range Concepts">
<link rel="prev" href="random_access_range.html" title="Random Access Range">
<link rel="next" href="../reference.html" title="Reference">
</head>
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
<table cellpadding="2" width="100%"><tr>
<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../boost.png"></td>
<td align="center"><a href="../../../../../../index.html">Home</a></td>
<td align="center"><a href="../../../../../../libs/libraries.htm">Libraries</a></td>
<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td>
<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td>
<td align="center"><a href="../../../../../../more/index.htm">More</a></td>
</tr></table>
<hr>
<div class="spirit-nav">
<a accesskey="p" href="random_access_range.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="../reference.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="range.concepts.concept_checking"></a><a class="link" href="concept_checking.html" title="Concept Checking">Concept Checking</a>
</h3></div></div></div>
<p>
Each of the range concepts has a corresponding concept checking class in
the file <a href="../../../../../../boost/range/concepts.hpp" target="_top"><code class="computeroutput"><span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">range</span><span class="special">/</span><span class="identifier">concepts</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span></code></a>.
These classes may be used in conjunction with the <a href="../../../../../../libs/concept_check/index.html" target="_top">Boost
Concept Check library</a> to ensure that the type of a template parameter
is compatible with a range concept. If not, a meaningful compile time error
is generated. Checks are provided for the range concepts related to iterator
traversal categories. For example, the following line checks that the type
<code class="computeroutput"><span class="identifier">T</span></code> models the <a class="link" href="forward_range.html" title="Forward Range">Forward
Range</a> concept.
</p>
<p>
</p>
<pre class="programlisting"><span class="identifier">BOOST_CONCEPT_ASSERT</span><span class="special">((</span> <span class="identifier">ForwardRangeConcept</span><span class="special"><</span><span class="identifier">T</span><span class="special">></span> <span class="special">));</span>
</pre>
<p>
</p>
<p>
An additional concept check is required for the value access property of
the range based on the range's iterator type. For example to check for a
ForwardReadableRange, the following code is required.
</p>
<p>
</p>
<pre class="programlisting"><span class="identifier">BOOST_CONCEPT_ASSERT</span><span class="special">((</span> <span class="identifier">ForwardRangeConcept</span><span class="special"><</span><span class="identifier">T</span><span class="special">></span> <span class="special">));</span>
<span class="identifier">BOOST_CONCEPT_ASSERT</span><span class="special">((</span> <span class="identifier">ReadableIteratorConcept</span><span class="special"><</span><span class="keyword">typename</span> <span class="identifier">range_iterator</span><span class="special"><</span><span class="identifier">T</span><span class="special">>::</span><span class="identifier">type</span><span class="special">></span> <span class="special">));</span>
</pre>
<p>
</p>
<p>
The following range concept checking classes are provided.
</p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
Class SinglePassRangeConcept checks for <a class="link" href="single_pass_range.html" title="Single Pass Range">Single
Pass Range</a>
</li>
<li class="listitem">
Class ForwardRangeConcept checks for <a class="link" href="forward_range.html" title="Forward Range">Forward
Range</a>
</li>
<li class="listitem">
Class BidirectionalRangeConcept checks for <a class="link" href="bidirectional_range.html" title="Bidirectional Range">Bidirectional
Range</a>
</li>
<li class="listitem">
Class RandomAccessRangeConcept checks for <a class="link" href="random_access_range.html" title="Random Access Range">Random
Access Range</a>
</li>
</ul></div>
<h5>
<a name="range.concepts.concept_checking.h0"></a>
<span><a name="range.concepts.concept_checking.see_also"></a></span><a class="link" href="concept_checking.html#range.concepts.concept_checking.see_also">See
also</a>
</h5>
<p>
<a class="link" href="../style_guide.html" title="Terminology and style guidelines">Range Terminology and style guidelines</a>
</p>
<p>
<a href="../../../../../../libs/iterator/doc/iterator_concepts.html" target="_top">Iterator concepts</a>
</p>
<p>
<a href="../../../../../../libs/concept_check/index.html" target="_top">Boost Concept Check library</a>
</p>
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright © 2003-2010 Thorsten Ottosen,
Neil Groves<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying
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>)
</p>
</div></td>
</tr></table>
<hr>
<div class="spirit-nav">
<a accesskey="p" href="random_access_range.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="../reference.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
</div>
</body>
</html>
|
