Tim Newsham's approach with invertible functions is interesting, though it feels like it's another layer wrapped on top of the primitive idea of functional references.
Not all of the refs are using invertible functions.. however, the ones that are invertible are more flexible.. you can use them to make functional references that are mapped over lists, for example. I've reformulated my code a few times since initially posting it.. In the latest incarnation, FRefGen (generic FRefs with arbitrary get/modify) and Inv (invertible functions) are both instances of an FRef class. In earlier versions I had a function for converting an invertible into an FRef.
~wren
Tim Newsham http://www.thenewsh.com/~newsham/ _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
