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[ghc-base.git] / Data / Typeable.hs-boot

diff --git a/Data/Typeable.hs-boot b/Data/Typeable.hs-boot
index d9bc373..9da3620 100644 (file)
--- a/Data/Typeable.hs-boot
+++ b/Data/Typeable.hs-boot
@@ -1,17 +1,18 @@
 
-{-# OPTIONS -fno-implicit-prelude #-}
+{-# OPTIONS_GHC -XNoImplicitPrelude #-}
 
 module Data.Typeable where
 
+import Data.Maybe
 import GHC.Base
-import GHC.Show
 
 data TypeRep
 data TyCon
 
 mkTyCon      :: String -> TyCon
 mkTyConApp   :: TyCon -> [TypeRep] -> TypeRep
-showsTypeRep :: TypeRep -> ShowS
+
+cast :: (Typeable a, Typeable b) => a -> Maybe b
 
 class Typeable a where
   typeOf :: a -> TypeRep