| 1 | <html> |
|---|
| 2 | |
|---|
| 3 | <head> |
|---|
| 4 | <meta http-equiv="Content-Type" content="text/html; charset=windows-1252"> |
|---|
| 5 | <meta name="GENERATOR" content="Microsoft FrontPage 4.0"> |
|---|
| 6 | <meta name="ProgId" content="FrontPage.Editor.Document"> |
|---|
| 7 | <title>Adjacency Iterator Adaptor Documentation</title> |
|---|
| 8 | </head> |
|---|
| 9 | |
|---|
| 10 | <body bgcolor="#FFFFFF" text="#000000"> |
|---|
| 11 | |
|---|
| 12 | <img src="../../../boost.png" alt="boost.png (6897 bytes)" |
|---|
| 13 | align="center" width="277" height="86"> |
|---|
| 14 | |
|---|
| 15 | <h1>Adjacency Iterator Adaptor</h1> |
|---|
| 16 | |
|---|
| 17 | Defined in header |
|---|
| 18 | <a href="../../../boost/graph/adjacency_iterator.hpp">boost/graph/adjacency_iterator.hpp</a> |
|---|
| 19 | |
|---|
| 20 | <p> |
|---|
| 21 | The adjacency iterator adaptor transforms an |
|---|
| 22 | <tt>out_edge_iterator</tt> into an adjacency iterator. That is, it |
|---|
| 23 | takes an iterator that traverses over edges, and creates an iterator |
|---|
| 24 | that traverses over the <b><i>target</i></b> vertices of those edges. |
|---|
| 25 | With this adaptor it is trivial to take a graph type that models <a |
|---|
| 26 | href="IncidenceGraph.html">Incidence Graph</a> and add the |
|---|
| 27 | capabilities required of <a href="AdjacencyGraph.html">Adjacency |
|---|
| 28 | Graph</a>. |
|---|
| 29 | |
|---|
| 30 | |
|---|
| 31 | <h2>Synopsis</h2> |
|---|
| 32 | |
|---|
| 33 | <pre> |
|---|
| 34 | namespace boost { |
|---|
| 35 | template <class Graph, class VertexDescriptor, class OutEdgeIter> |
|---|
| 36 | class adjacency_iterator_generator { |
|---|
| 37 | public: |
|---|
| 38 | typedef <a href="../../iterator/doc/iterator_adaptor.html">iterator_adaptor</a><...> type; |
|---|
| 39 | }; |
|---|
| 40 | } |
|---|
| 41 | </pre> |
|---|
| 42 | |
|---|
| 43 | <hr> |
|---|
| 44 | |
|---|
| 45 | <h3>Example</h3> |
|---|
| 46 | |
|---|
| 47 | <p> |
|---|
| 48 | The following is an example of how to use the |
|---|
| 49 | <tt>adjacency_iterator_generator</tt> class. |
|---|
| 50 | |
|---|
| 51 | <p> |
|---|
| 52 | <PRE> |
|---|
| 53 | #include <boost/graph/adjacency_iterator.hpp> |
|---|
| 54 | |
|---|
| 55 | class my_graph { |
|---|
| 56 | // ... |
|---|
| 57 | typedef ... out_edge_iterator; |
|---|
| 58 | typedef ... vertex_descriptor; |
|---|
| 59 | typedef boost::adjacency_iterator_generator<my_graph, vertex_descriptor, out_edge_iterator>::type adjacency_iterator; |
|---|
| 60 | // ... |
|---|
| 61 | }; |
|---|
| 62 | |
|---|
| 63 | </PRE> |
|---|
| 64 | |
|---|
| 65 | <h3>Template Parameters</h3> |
|---|
| 66 | |
|---|
| 67 | <Table border> |
|---|
| 68 | <TR> |
|---|
| 69 | <TH>Parameter</TH><TH>Description</TH> |
|---|
| 70 | </TR> |
|---|
| 71 | |
|---|
| 72 | <TR> |
|---|
| 73 | <TD><tt>Graph</tt></TD> |
|---|
| 74 | <TD>The graph type, which must model <a |
|---|
| 75 | href="./IncidenceGraph.html">Incidence Graph</a>.</TD> |
|---|
| 76 | </TR> |
|---|
| 77 | |
|---|
| 78 | <TR> |
|---|
| 79 | <TD><tt>VertexDescriptor</tt></TD> |
|---|
| 80 | <TD>This must be the same type as |
|---|
| 81 | <tt>graph_traits<Graph>::vertex_descriptor</tt>. The reason why |
|---|
| 82 | this is a template parameter is that the primary use of |
|---|
| 83 | <tt>adjacency_iterator_generator</tt> is <b><i>inside</i></b> the |
|---|
| 84 | definition of the graph class, and in that context we can not use |
|---|
| 85 | <tt>graph_traits</tt> on the not yet fully defined graph class.<br> |
|---|
| 86 | <b>Default:</b> <tt>graph_traits<Graph>::vertex_descriptor</tt></TD> |
|---|
| 87 | </TR> |
|---|
| 88 | |
|---|
| 89 | <TR> |
|---|
| 90 | <TD><tt>OutEdgeIter</tt></TD> |
|---|
| 91 | <TD>This must be the same type as |
|---|
| 92 | <tt>graph_traits<Graph>::out_edge_iterator</tt>.<br> |
|---|
| 93 | <b>Default:</b> <tt>graph_traits<Graph>::out_edge_iterator |
|---|
| 94 | </TD> |
|---|
| 95 | </TR> |
|---|
| 96 | |
|---|
| 97 | </Table> |
|---|
| 98 | |
|---|
| 99 | <h3>Model of</h3> |
|---|
| 100 | |
|---|
| 101 | The adjacency iterator adaptor (the type |
|---|
| 102 | <tt>adjacency_iterator_generator<...>::type</tt>) is a model of <a |
|---|
| 103 | href="../../utility/MultiPassInputIterator.html">Multi-Pass Input Iterator</a> |
|---|
| 104 | </a>. |
|---|
| 105 | |
|---|
| 106 | |
|---|
| 107 | <h3>Members</h3> |
|---|
| 108 | |
|---|
| 109 | The adjacency iterator type implements the member functions and |
|---|
| 110 | operators required of the <a |
|---|
| 111 | href="http://www.sgi.com/tech/stl/RandomAccessIterator.html">Random Access Iterator</a> |
|---|
| 112 | concept, except that the <tt>reference</tt> type is the same as the <tt>value_type</tt> |
|---|
| 113 | so <tt>operator*()</tt> returns by-value. In addition it has the following constructor: |
|---|
| 114 | |
|---|
| 115 | <pre> |
|---|
| 116 | adjacency_iterator_generator::type(const OutEdgeIter& it, const Graph* g) |
|---|
| 117 | </pre> |
|---|
| 118 | |
|---|
| 119 | <hr> |
|---|
| 120 | <p>Revised <!--webbot bot="Timestamp" s-type="EDITED" s-format="%d %b %Y" startspan -->19 Aug 2001<!--webbot bot="Timestamp" endspan i-checksum="14767" --></p> |
|---|
| 121 | <p>© Copyright Jeremy Siek 2000. Permission to copy, use, |
|---|
| 122 | modify, sell and distribute this document is granted provided this copyright |
|---|
| 123 | notice appears in all copies. This document is provided "as is" |
|---|
| 124 | without express or implied warranty, and with no claim as to its suitability for |
|---|
| 125 | any purpose.</p> |
|---|
| 126 | |
|---|
| 127 | </body> |
|---|
| 128 | |
|---|
| 129 | </html> |
|---|
