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{-# Language PatternSynonyms, ViewPatterns, GADTs, ConstraintKinds, RankNTypes, KindSignatures, PolyKinds, ScopedTypeVariables, DataKinds, TypeInType, TypeOperators, TypeApplications, TypeFamilies, TypeFamilyDependencies #-}
module T14507 where
import Type.Reflection
import Data.Kind
foo :: TypeRep a -> (Bool :~~: k, TypeRep a)
foo rep = error "urk"
type family SING :: k -> Type where
SING = (TypeRep :: Bool -> Type)
pattern RepN :: forall (a::kk). () => Bool~kk => SING a -> TypeRep (a::kk)
pattern RepN tr <- (foo -> ( HRefl :: Bool:~~:kk
, tr :: TypeRep (a::Bool)))
pattern SO x <- RepN (id -> x)
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