CC-ing haskell-cafe again: Immanuel Normann writes:

2010/7/24 Ivan Lazar Miljenovic

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Immanuel Normann writes:

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Afterall, my purpose is to get access to the map in a NodeMap and finally to apply lookup to it. But I don't know how to access the map from a NodeMap (the map selector isn't accessible either).

You're not meant to; the point of NodeMap is to serve as a wrapper around the normal graph types, not for you to use directly (exactly the same as why the constructor for Map isn't exported).

May I ask, however, why you want to use Data.Graph.Inductive.NodeMap?

Some of my lnodes in the graph have by construction unique labels and I want to lookup the lnode from a graph given only the label of that lnode.

Well, from my understanding NodeMap doesn't do what you want, since it assumes that _all_ of the node labels are unique. Furthemore, the way of using it seems to be analogous of how one would use a State monad rather than for actual interactive use throughout. -- Ivan Lazar Miljenovic Ivan.Miljenovic@gmail.com IvanMiljenovic.wordpress.com