Re: [Boost-users] [Graph] edge() not working

From: Daniel Wallin (daniel_at_[hidden])
Date: 2007-08-31 15:50:03

David A. Greene wrote:
> [Apologies if this has been asked before.  Gmane is down and Google didn't 
>  return anything interesting.]
> 
> I have a Boost (1.34.1) Graph declared like this:
> 
>       typedef boost::adjacency_list<boost::setS,    // Out edge list type
> 				    boost::listS,    // Vertex list type 
> 				    boost::undirectedS,
> 				    vertex_property_bundle // Vertex properties
> 				    // Edge properties
> 				    > my_graph_type;
> 
> I want to find out if an edge is in the graph:
> 
>       typedef typename boost::graph_traits<my_graph_type>::
>       edge_descriptor_type edge;
> 
>       edge e;
>       bool present;
>       boost::tie(e, present) = edge(v1, v2, my_graph);
                                 ^^^^

I think you want to use boost::edge() here, rather than creating an
edge_descriptor.

-- 
Daniel Wallin
Boost Consulting
www.boost-consulting.com