-{-# OPTIONS -fno-implicit-prelude #-}
+{-# LANGUAGE NoImplicitPrelude #-}
+
module Data.Typeable where
+
+import Data.Maybe
+import GHC.Base
+
data TypeRep
+data TyCon
+
+mkTyCon :: String -> TyCon
+mkTyConApp :: TyCon -> [TypeRep] -> TypeRep
+
+cast :: (Typeable a, Typeable b) => a -> Maybe b
+
+class Typeable a where
+ typeOf :: a -> TypeRep
+