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[project @ 1998-12-02 13:17:09 by simonm]
[ghc-hetmet.git]
/
ghc
/
interpreter
/
test
/
typechecker
/
t015.hs
1
--!!! Can't derive instances if you use existentials
2
3
data Expr a = App (Expr (b -> a)) (Expr b)
4
| K a
5
deriving (Show)