From: simonmar <unknown>
Date: Fri, 29 Jun 2001 09:41:37 +0000 (+0000)
Subject: [project @ 2001-06-29 09:41:37 by simonmar]
X-Git-Tag: nhc98-1-18-release~1232
X-Git-Url: http://git.megacz.com/?a=commitdiff_plain;h=77af63d30b55fd40254d0674feff81b01bc85585;p=haskell-directory.git

[project @ 2001-06-29 09:41:37 by simonmar]
merge fptools/hslibs/lang/ST.lhs rev. 1.4
---

diff --git a/Control/Monad/ST.hs b/Control/Monad/ST.hs
index 6cbae95..7817add 100644
--- a/Control/Monad/ST.hs
+++ b/Control/Monad/ST.hs
@@ -8,7 +8,7 @@
 -- Stability   :  experimental
 -- Portability :  non-portable
 --
--- $Id: ST.hs,v 1.1 2001/06/28 14:15:02 simonmar Exp $
+-- $Id: ST.hs,v 1.2 2001/06/29 09:41:37 simonmar Exp $
 --
 -- The State Transformer Monad, ST
 --
@@ -37,9 +37,7 @@ import GHC.Prim		( unsafeCoerce#, RealWorld )
 import GHC.IOBase 	( IO(..), stToIO )
 
 unsafeIOToST        :: IO a -> ST s a
-unsafeIOToST (IO io) = ST $ \ s ->
-    case ((unsafeCoerce# io) s) of
-      (#  new_s, a #) -> unsafeCoerce# (STret new_s a)
+unsafeIOToST (IO io) = ST $ \ s -> (unsafeCoerce# io) s
 #endif
 
 -- ---------------------------------------------------------------------------