From: Vladimir Prus (ghost_at_[hidden])
Date: 2003-01-29 11:01:25
Well, external properties still confuse me. Assume I want to attach
some data to vertices in adjacency_list. No problem:
vector< vertex > alternative_s ;
property_map<G, vertex_index_t> > alternative = ...
The problem is that I have to pass alternative_s.begin() when
constructig alternative, but I might want to add new vertices.
In that case the iterator can be invalidated.
Is there a solution to this problem, except for resorting to internal
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