shithub: MicroHs

ref: 1aa307355c68e60a2cfb8be104ad6f2783d7bd14
dir: /tests/StandDer.hs/

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module StandDer where

data X = X
deriving instance Show X

data T a = A | B | C a | D (T a)

deriving instance (Show a) => Show (T a)

main :: IO ()
main = do
  print X
  print [A, B, C True, D A]