[Boost-users] Fwd: Why am I not hearing that my edge has already been added?

From: Eric Fowler (eric.fowler_at_[hidden])
Date: 2006-09-07 11:53:36

OK, thanks. Now how do I declare a graph that does not allow parallel edges?

---------- Forwarded message ----------
From: moritz Hilger <moritz.hilger_at_[hidden]>
Date: Sep 7, 2006 2:18 AM
Subject: Re: [Boost-users] Why am I not hearing that my edge has already
been added?
To: boost-users_at_[hidden]

The problem is that add_edge() never clears boolvar - it is always true,
> even when I coerce redundant edges, as in the following code:
>

the problem is that your graph allows parallel edges, therefor the adding
always succeeds. you would have to check for existing edges via
out_edges(va).
cheers,
moritz

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