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- Copyright (c) Jeremy Siek, Lie-Quan Lee, and Andrew Lumsdaine 2000
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- Distributed under the Boost Software License, Version 1.0.
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- <Head>
- <Title>Boost Graph Library: bfs_visitor</Title>
- <BODY BGCOLOR="#ffffff" LINK="#0000ee" TEXT="#000000" VLINK="#551a8b"
- ALINK="#ff0000">
- <IMG SRC="../../../boost.png"
- ALT="C++ Boost" width="277" height="86">
- <BR Clear>
- <H1>
- <pre>
- bfs_visitor<EventVisitorList>
- </pre>
- </H1>
- This class is an adapter that converts a list of <a
- href="./EventVisitor.html">EventVisitor</a>s (constructed using
- <tt>std::pair</tt>) into a <a href="./BFSVisitor.html">BFSVisitor</a>.
- <h3>Example</h3>
- This is an excerpt from <a
- href="../example/bfs.cpp"><tt>examples/bfs.cpp</tt></a> where three
- event-visitors are combined to make a BFS visitor. The functions
- <tt>boost::record_distances</tt>, <tt>boost::record_predecessors</tt>,
- and <tt>copy_graph</tt> are all functions that create an event
- visitor.
- <pre>
- // Construct graph G and obtain the source vertex s ...
- boost::breadth_first_search(G, s,
- boost::make_bfs_visitor(
- std::make_pair(boost::record_distances(d, boost::on_tree_edge()),
- std::make_pair(boost::record_predecessors(p.begin(),
- boost::on_tree_edge()),
- copy_graph(G_copy, boost::on_examine_edge())))) );
- </pre>
- <h3>Model of</h3>
- <a href="./BFSVisitor.html">BFSVisitor</a>
- <H3>Template Parameters</H3>
- <P>
- <TABLE border>
- <TR>
- <th>Parameter</th><th>Description</th><th>Default</th>
- </tr>
- <TR><TD><TT>EventVisitorList</TT></TD>
- <TD>
- A list of <a href="./EventVisitor.html">EventVisitor</a>'s created
- with <tt>std::pair</tt>.
- </TD>
- <TD><a href="./null_visitor.html"><tt>null_visitor</tt></a></TD>
- </TR>
- </table>
- <H3>Where Defined</H3>
- <P>
- <a href="../../../boost/graph/breadth_first_search.hpp">
- <TT>boost/graph/breadth_first_search.hpp</TT></a>
- <h3>Member Functions</h3>
- This class implements all of the member functions required by <a
- href="./BFSVisitor.html">BFSVisitor</a>. In each function the
- appropriate event is dispatched to the <a
- href="./EventVisitor.html">EventVisitor</a> in the EventVisitorList.
- <h3>Non-Member Functions</h3>
- <table border>
- <tr>
- <th>Function</th><th>Description</th>
- </tr>
- <tr><td><tt>
- template <class EventVisitorList><br>
- bfs_visitor<EventVisitorList><br>
- make_bfs_visitor(EventVisitorList ev_list);
- </tt></td><td>
- Returns the event visitor list adapted to be a BFS visitor.
- </td></tr>
- </table>
- <h3>See Also</h3>
- <a href="./visitor_concepts.html">Visitor concepts</a>
- <p>
- The following are event visitors: <a
- href="./predecessor_recorder.html"><tt>predecessor_recorder</tt></a>,
- <a href="./distance_recorder.html"><tt>distance_recorder</tt></a>,
- <a href="./time_stamper.html"><tt>time_stamper</tt></a>,
- and <a href="./property_writer.html"><tt>property_writer</tt></a>.
- <br>
- <HR>
- <TABLE>
- <TR valign=top>
- <TD nowrap>Copyright © 2000-2001</TD><TD>
- <A HREF="http://www.boost.org/people/jeremy_siek.htm">Jeremy Siek</A>,
- Indiana University (<A
- HREF="mailto:jsiek@osl.iu.edu">jsiek@osl.iu.edu</A>)<br>
- <A HREF="http://www.boost.org/people/liequan_lee.htm">Lie-Quan Lee</A>, Indiana University (<A HREF="mailto:llee@cs.indiana.edu">llee@cs.indiana.edu</A>)<br>
- <A HREF="https://homes.cs.washington.edu/~al75">Andrew Lumsdaine</A>,
- Indiana University (<A
- HREF="mailto:lums@osl.iu.edu">lums@osl.iu.edu</A>)
- </TD></TR></TABLE>
- </BODY>
- </HTML>
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