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{-# LANGUAGE Haskell2010 #-}
{-# LANGUAGE PatternSynonyms #-}
{-# LANGUAGE ExistentialQuantification #-}
{-# LANGUAGE GADTs #-}
{-# LANGUAGE KindSignatures #-}
module ConstructorPatternExport (
pattern FooCons
, pattern MyRecCons
, pattern (:+)
, pattern BlubCons
, pattern MyGADTCons
) where
data Foo a = FooCons String a
data MyRec = MyRecCons { one :: Bool, two :: Int }
data MyInfix a = String :+ a
data Blub = forall b. Show b => BlubCons b
data MyGADT :: * -> * where
MyGADTCons :: forall a. Eq a => a -> Int -> MyGADT (Maybe String)
pattern MyGADTCons' :: () => forall a. Eq a => a -> Int -> MyGADT (Maybe String)
pattern MyGADTCons' x y = MyGADTCons x y
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