Shouldn't there be more instances of Data and friends?
I thought that tuples beyond size 2 were mentioned
here before ghc 6.2, but this silly example doesn't work
because of missing Data instance (it does work with d
instead of d3):
import Data.Generics
-- file = "Tst.hs"
d = (["hi","head"],("ho",(True,"head")))
d3 = (["hi","head"],"ho",(True,"head"))
main = print $ everywhere (id `extT` worker) d3
where
worker "head" = "tail"
worker s = s
Since these instances claim to be derivable: shouldn't
that be done for the stuff in Language.Haskell.Syntax?
cheers,
claus
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