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Subject: [boost] [BGL] Why source() needs a graph argument?
From: Cosimo Calabrese (cosimo.calabrese_at_[hidden])
Date: 2009-10-02 07:12:23

Hi to all,

the question is in subject. I don't understand it. Either source() and
target() functions only return the m_source member and the m_target of
edge_base. They don't use the graph argument, that is not even used.

I need to know it because I'm implementing an union_graph adaptor, that
provides the join's view of 2 graph. When I call the source() function
on a union_graph, I provide an edge_descriptor; but whereas the source()
function of an adjacency_list needs a graph argument, I need to know
which graph belongs the edge, which is an 2 * O|E| operation on 2 graphs.

Cosimo Calabrese

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