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| <Head> |
| <Title>Boost Graph Library: incident</Title> |
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| |
| <H1><A NAME="sec:incident"></A> |
| <TT>incident</TT> |
| </H1> |
| |
| <P> |
| <DIV ALIGN="left"> |
| <TABLE CELLPADDING=3 border> |
| |
| <TR><TH ALIGN="LEFT"><B>Complexity:</B></TH> |
| <TD ALIGN="LEFT"><i>O(1)</i> |
| </TD> |
| </TR> |
| |
| <TR><TH ALIGN="LEFT"><B>Where Defined:</B></TH> |
| <TD ALIGN="LEFT"> |
| <a href="../../../boost/graph/graph_utility.hpp"><TT>boost/graph/graph_utility.hpp</TT></a> |
| </TD> |
| |
| </TABLE> |
| </DIV> |
| |
| <P> |
| <PRE> |
| template <class Graph> |
| std::pair<typename graph_traits<Graph>::vertex_descriptor, |
| typename graph_traits<Graph>::vertex_descriptor> |
| incident(typename graph_traits<Graph>::edge_descriptor e, Graph& g) |
| </pre> |
| |
| This function takes and edge descriptor and returns the pair of |
| vertices that are <i>incident</i> to the edge. For directed graphs, |
| the <tt>first</tt> vertex is the source and the <tt>second</tt> vertex |
| is the target. This function is equivalent to the expression |
| <tt>std::make_pair(source(e, g), target(e, g))</tt>. |
| |
| |
| <h3>Example</h3> |
| |
| <pre> |
| edge_descriptor e; |
| vertex_descriptor u, v; |
| ... |
| tie(u, v) = incident(e, g); |
| </pre> |
| |
| |
| <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="http://www.osl.iu.edu/~lums">Andrew Lumsdaine</A>, |
| Indiana University (<A |
| HREF="mailto:lums@osl.iu.edu">lums@osl.iu.edu</A>) |
| </TD></TR></TABLE> |
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