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authorRyan Scott <ryan.gl.scott@gmail.com>2019-10-23 09:42:20 -0400
committerAlec Theriault <alec.theriault@gmail.com>2019-10-23 10:37:17 -0400
commit2a5fc0ad50c857098558461434c29abd478ea0a1 (patch)
tree0c1b0312461b6e23380e73d5187747d50970cb8f /html-test/src/Bug1103.hs
parentcdf4445a877428f5969f712a95830af38029b9a0 (diff)
Reify oversaturated data family instances correctly (#1103)
This fixes #1103 by adapting the corresponding patch for GHC (see https://gitlab.haskell.org/ghc/ghc/issues/17296 and https://gitlab.haskell.org/ghc/ghc/merge_requests/1877).
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diff --git a/html-test/src/Bug1103.hs b/html-test/src/Bug1103.hs
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+{-# LANGUAGE DataKinds #-}
+{-# LANGUAGE GADTs #-}
+{-# LANGUAGE PolyKinds #-}
+{-# LANGUAGE TypeFamilies #-}
+module Bug1103 where
+
+import Data.Kind
+
+data family Foo1 :: Type -> Type
+data instance Foo1 Bool = Foo1Bool
+data instance Foo1 (Maybe a)
+
+data family Foo2 :: k -> Type
+data instance Foo2 Bool = Foo2Bool
+data instance Foo2 (Maybe a)
+data instance Foo2 :: Char -> Type
+data instance Foo2 :: (Char -> Char) -> Type where
+
+data family Foo3 :: k
+data instance Foo3
+data instance Foo3 Bool = Foo3Bool
+data instance Foo3 (Maybe a)
+data instance Foo3 :: Char -> Type
+data instance Foo3 :: (Char -> Char) -> Type where