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Created January 4, 2019 17:55
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typeable43.hs
import Data.HashMap.Strict as Map
insert :: Typeable a => a -> TyMap -> TyMap
insert x = Map.insert (SomeTypeRep (typeRep :: TypeRep a)) (toDynamic x)
lookup :: Typeable a => TyMap -> Maybe a
lookup = fromDynamic <=< Map.lookup (SomeTypeRep (typeRep :: TypeRep a))
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