mirror of
https://github.com/boostorg/graph.git
synced 2025-05-11 13:24:01 +00:00
91 lines
2.4 KiB
HTML
91 lines
2.4 KiB
HTML
<HTML>
|
|
<!--
|
|
-- Copyright (c) Jeremy Siek 2000
|
|
--
|
|
-- Permission to use, copy, modify, distribute and sell this software
|
|
-- and its documentation for any purpose is hereby granted without fee,
|
|
-- provided that the above copyright notice appears in all copies and
|
|
-- that both that copyright notice and this permission notice appear
|
|
-- in supporting documentation. Silicon Graphics makes no
|
|
-- representations about the suitability of this software for any
|
|
-- purpose. It is provided "as is" without express or implied warranty.
|
|
-->
|
|
<Head>
|
|
<Title>AdjacencyMatrix</Title>
|
|
<BODY BGCOLOR="#ffffff" LINK="#0000ee" TEXT="#000000" VLINK="#551a8b"
|
|
ALINK="#ff0000">
|
|
<IMG SRC="../../../c++boost.gif"
|
|
ALT="C++ Boost" width="277" height="86">
|
|
|
|
<BR Clear>
|
|
|
|
|
|
|
|
<H2><A NAME="concept:AdjacencyMatrix"></A>
|
|
AdjacencyMatrix
|
|
</H2>
|
|
|
|
<P>
|
|
The AdjacencyMatrix concept refines <a href="./Graph.html">Graph</a>
|
|
concept and adds the requirement for efficient access to any edge in
|
|
the graph given the source and target vertices. No Boost Graph Library
|
|
algorithms currently use this concept. However there are algorithms
|
|
not yet implemented such as Floyd-Warshall that would require this
|
|
concept.
|
|
|
|
<H3>Refinement of</H3>
|
|
|
|
<a href="./Graph.html">Graph</a>
|
|
|
|
<H3>Valid Expressions</H3>
|
|
|
|
<table border>
|
|
|
|
<tr>
|
|
<th>Name</th><th>Expression</th><th>Return Type</th><th>Description</th>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td>Direct Edge Access</td>
|
|
<TD><TT>edge(u,v,g)</TT></TD>
|
|
<TD><TT>std::pair<edge_descriptor, bool></TT></TD>
|
|
<TD>
|
|
Returns a pair consisting of a flag saying whether there exists an
|
|
edge between <TT>u</TT> and <TT>v</TT> in graph <TT>g</TT>, and
|
|
consisting of the edge descriptor if the edge was found.
|
|
</TD>
|
|
</TR>
|
|
</TABLE>
|
|
|
|
<H3>Models</H3>
|
|
|
|
<a href="./adjacency_matrix.html"><tt>adjacency_matrix</tt></a>
|
|
|
|
<H3>Concept Checking Class</H3>
|
|
|
|
<PRE>
|
|
template <class G>
|
|
struct AdjacencyMatrix
|
|
{
|
|
typedef typename boost::graph_traits<G>::edge_descriptor edge_descriptor;
|
|
void constraints() {
|
|
p = edge(u, v, g);
|
|
}
|
|
typename boost::graph_traits<G>::vertex_descriptor u, v;
|
|
std::pair<bool, edge_descriptor> p;
|
|
G g;
|
|
};
|
|
</PRE>
|
|
|
|
|
|
<br>
|
|
<HR>
|
|
<TABLE>
|
|
<TR valign=top>
|
|
<TD nowrap>Copyright © 2000-2001</TD><TD>
|
|
<A HREF="../../../people/jeremy_siek.htm">Jeremy Siek</A>, Indiana University (<A HREF="mailto:jsiek@osl.iu.edu">jsiek@osl.iu.edu</A>)
|
|
</TD></TR></TABLE>
|
|
|
|
</BODY>
|
|
</HTML>
|