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Add 'null_vertex' support to subgraph.

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[SVN r22558]
This commit is contained in:
Vladimir Prus
2004-03-26 16:35:19 +00:00
parent 91b24b6363
commit ff0ea074ab
1 changed files with 6 additions and 0 deletions
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6
include/boost/graph/subgraph.hpp
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@@ -66,6 +66,12 @@ namespace boost {
typedef typename Traits::edge_parallel_category edge_parallel_category;
typedef typename Traits::traversal_category traversal_category;
static vertex_descriptor null_vertex()
{
return Traits::null_vertex();
}
// IncidenceGraph requirements
typedef typename Traits::out_edge_iterator out_edge_iterator;
typedef typename Traits::degree_size_type degree_size_type;