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{-# LANGUAGE DataKinds #-}
{-# LANGUAGE PolyKinds #-}
{-# LANGUAGE TemplateHaskell #-}
{-# LANGUAGE TypeFamilies #-}
{-# OPTIONS_GHC -ddump-splices #-}
module T15243 where
data Unit = Unit
$([d| type family F (a :: k) :: k where
F 'Unit = 'Unit
F '(,) = '(,)
F '[] = '[]
F '(:) = '(:)
|])
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