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source: downloads/boost_1_34_1/libs/graph/doc/property.html @ 47

Last change on this file since 47 was 29, checked in by landauf, 17 years ago

updated boost from 1_33_1 to 1_34_1
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1<HTML>
2<!--
3  -- Copyright (c) Jeremy Siek, Lie-Quan Lee, and Andrew Lumsdaine 2000
4  --
5  -- Distributed under the Boost Software License, Version 1.0.
6  -- (See accompanying file LICENSE_1_0.txt or copy at
7  -- http://www.boost.org/LICENSE_1_0.txt)
8  -->
9<Head>
10<Title>Boost Graph Library: Property</Title>
11<BODY BGCOLOR="#ffffff" LINK="#0000ee" TEXT="#000000" VLINK="#551a8b" 
12        ALINK="#ff0000"> 
13<IMG SRC="../../../boost.png" 
14     ALT="C++ Boost" width="277" height="86"> 
15
16<BR Clear>
17
18<H1><A NAME="sec:property"></A>
19<TT>property&lt;PropertyTag, T, NextProperty&gt;</TT>
20</H1>
21
22This class can be used with the <a
23href="./adjacency_list.html"><tt>adjacency_list</tt></a> and the <a
24href="./adjacency_matrix.html"><tt>adjacency_matrix</tt></a> classes
25to specify what kind of properties should be attached to the vertices
26and edges of the graph, and to the graph object itself.
27
28
29<h3>Synopsis</h3>
30
31<pre>
32namespace boost {
33  template &lt;class Tag, class T, class NextProperty = no_property&gt;
34  struct property : public NextProperty {
35    typedef NextProperty next_type;
36    typedef Tag tag_type;
37    typedef T value_type;
38    property();
39    property(const T&amp; v);
40    property(const T&amp; v, const NextProperty&amp; b);
41    // copy constructor and assignment operator will be generated by compiler
42    T m_value;
43  };
44}
45</pre>
46
47<h3>Template Parameters</h3>
48
49
50<P>
51<TABLE border>
52<TR>
53<th>Parameter</th><th>Description</th><th>Default</th>
54</tr>
55
56<tr>
57<td><tt>PropertyTag</tt></td>
58
59<td>A type to identify (give a unique name to) the property. There are
60several predefined tags, and it is easy to add more. For convenience,
61BGL also provides predefined objects of the tag types (enum values)
62for use as arguments to functions that expect property tag objects
63(such as <tt>adjacency_list</tt>'s <a
64href="./adjacency_list.html#property-map-accessors"> property map
65accessor</a> functions). </td>
66
67<td>&nbsp;</td>
68</tr>
69
70<tr>
71<td><tt>T</tt></td>
72<td> This type specifies the type of the property values. </td>
73<td>&nbsp;</td>
74</tr>
75
76<tr>
77<td><tt>NextProperty</tt></td>
78<td>This parameter allows <tt>property</tt> types to be
79  nested, so that an arbitrary number of properties can be attached to
80  the same graph.</td>
81<td><tt>no_property</tt></td>
82</tr>
83</table>
84
85<h3>Where Defined</h3>
86
87<a href="../../../boost/pending/property.hpp"><tt>boost/pending/property.hpp</tt></a>
88
89<hr>
90
91<H3>Associated Types</H3>
92
93<pre>
94next_type
95</pre>
96The <tt>NextProperty</tt> type parameter.
97
98<pre>
99tag_type
100</pre>
101The <tt>Tag</tt> type parameter.
102
103<pre>
104value_type
105</pre>
106The <tt>T</tt> type parameter.
107
108<hr>
109
110<H3>Member Functions</H3>
111
112<pre>
113property()
114</pre>
115
116Construct a property object with member <tt>m_value</tt> a default
117constructed instance of type <tt>T</tt> and with the super object
118default constructed. Note that <tt>T</tt> must be Default
119Constructible for this property, and all the inherited property types.
120
121<hr>
122
123<pre>
124property(const T& v)
125</pre>
126
127Construct a property object with member <tt>m_value</tt> a copy
128of <tt>v</tt>.
129
130<hr>
131
132<pre>
133property(const T& v, const NextProperty& b)
134</pre>
135
136Construct a property object with member <tt>m_value</tt> a copy
137of <tt>v</tt> and whose super class <tt>NextProperty</tt> is
138constructed from <tt>b</tt>.
139
140<hr>
141
142
143<h3>Property Tags</h3>
144
145The following property tags are defined in
146<tt>boost/graph/properties.hpp</tt>.
147
148<pre>
149  namespace boost {
150    enum edge_name_t { edge_name };
151    enum edge_weight_t { edge_weight };
152    enum edge_index_t { edge_index };
153    enum edge_capacity_t { edge_capacity };
154    enum edge_residual_capacity_t { edge_residual_capacity };
155    enum edge_reverse_t { edge_reverse };
156    enum vertex_name_t { vertex_name };
157    enum vertex_distance_t { vertex_distance };
158    enum vertex_index_t { vertex_index };
159    enum vertex_color_t { vertex_color };
160    enum vertex_degree_t { vertex_degree };
161    enum vertex_out_degree_t { vertex_out_degree };
162    enum vertex_in_degree_t { vertex_in_degree };
163    enum vertex_discover_time_t { vertex_discover_time };
164    enum vertex_finish_time_t { vertex_finish_time };
165    enum graph_name_t { graph_name };
166
167    BOOST_INSTALL_PROPERTY(vertex, index);
168    BOOST_INSTALL_PROPERTY(edge, index);
169    // ...
170  }
171</pre>
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