Re: [Boost-users] Boost.Graph set of edges

On Wed, Mar 11, 2009 at 6:30 PM, Michael Fawcett wrote:

On Wed, Mar 11, 2009 at 1:18 PM, Johan Oudinet wrote:

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I finally found the implementation of edge_descriptor in boost/graph/detail/edge.hpp Since I found that operator== use get_property method, I defined an operator < that compares results of get_property()

I think it works for my graphs. But I have no idea of the limitations of this silly workaround!

Strangely enough, I use std::set without having to define a less-than operator.  Perhaps it has to do with what the vertex and edge storage types are?  I use vecS for both.

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Hope it will be useful for someone else.

There have been threads in the past where this same solution was posted.  I can't remember what the authors said about portability and correctness, but I would search the mailing lists for "edge_descriptor" + "operator".

Ok. It's because I use boost 1.34.1 (that is the current version in Ubuntu Intrepid repositories!). I've just checked for in the last Boost version (1.38) and, now, the operator< is defined in the file boost/graph/detail/edge.hpp Since they compare get_property() as I do, I know I can safety do it ;) Thanks Michael for pointing me out that I'm using an old version. Regards, -- Johan