[project @ 2005-02-02 14:54:18 by ross]

[ghc-base.git] / Control / Monad / ST.hs

diff --git a/Control/Monad/ST.hs b/Control/Monad/ST.hs
index be57243..0e34857 100644 (file)
--- a/Control/Monad/ST.hs
+++ b/Control/Monad/ST.hs
@@ -33,14 +33,17 @@ module Control.Monad.ST
 import Prelude
 
 import Control.Monad.Fix
-import Data.Typeable
 
 #include "Typeable.h"
 
 #ifdef __HUGS__
+import Data.Typeable
 import Hugs.ST
 import qualified Hugs.LazyST as LazyST
 
+INSTANCE_TYPEABLE2(ST,sTTc,"ST")
+INSTANCE_TYPEABLE0(RealWorld,realWorldTc,"RealWorld")
+
 fixST :: (a -> ST s a) -> ST s a
 fixST f = LazyST.lazyToStrictST (LazyST.fixST (LazyST.strictToLazyST . f))
 
@@ -58,7 +61,3 @@ import GHC.IOBase     ( stToIO, unsafeIOToST )
 instance MonadFix (ST s) where
        mfix = fixST
 
--- ---------------------------------------------------------------------------
--- Typeable instance
-
-INSTANCE_TYPEABLE2(ST,sTTc,"ST")