File: DerivingStrategies.hs.prettyprinter.golden

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{-# LANGUAGE DeriveAnyClass #-}
{-# LANGUAGE DerivingStrategies #-}
{-# LANGUAGE GeneralizedNewtypeDeriving #-}
{-# LANGUAGE StandaloneDeriving #-}
module DerivingStrategies where

class C a

class D a

newtype Foo a = MkFoo a
                  deriving ()
                  deriving stock (Eq, Ord)
                  deriving newtype Show
                  deriving anyclass C

deriving stock instance Read a => Read (Foo a)

deriving newtype instance Num a => Num (Foo a)

deriving anyclass instance D (Foo a)