I don't know enough about Uniplate to make a judgement on that point,
so I'll just pipe up and say that having Data/Typeable instances for
Expr, Binds and friends would be of much benefit to the GHC plugins
project. I've actually already written my own instances and put them
straight into CoreSyn.hs on the plugins branch, but having them
available via an explicit import is probably a better approach.
How did you define the Data instances for the abstract types
(break the abstraction or define the instances abstractly), and
how do your instances compare to the ones at
http://hackage.haskell.org/trac/ghc/wiki/GhcApiAstTraversals ?
Claus
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