[project @ 2004-10-17 00:09:58 by ross]

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

diff --git a/Control/Monad/ST.hs b/Control/Monad/ST.hs
index 5ea1052..be57243 100644 (file)
--- a/Control/Monad/ST.hs
+++ b/Control/Monad/ST.hs
@@ -50,15 +50,9 @@ unsafeInterleaveST =
 #endif
 
 #ifdef __GLASGOW_HASKELL__
-import GHC.ST
-import GHC.Base                ( unsafeCoerce#, RealWorld )
-import GHC.IOBase      ( IO(..), stToIO )
-
--- This relies on IO and ST having the same representation modulo the
--- constraint on the type of the state
---
-unsafeIOToST        :: IO a -> ST s a
-unsafeIOToST (IO io) = ST $ \ s -> (unsafeCoerce# io) s
+import GHC.ST          ( ST, runST, fixST, unsafeInterleaveST )
+import GHC.Base                ( RealWorld )
+import GHC.IOBase      ( stToIO, unsafeIOToST )
 #endif
 
 instance MonadFix (ST s) where