X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=GHC%2FSTRef.lhs;h=9824b15f932ca851f08988c6ddf20cc20bc80d74;hb=28fb12f4e4059674e9396fc76a2783e0ae8798cd;hp=5eecb85937a73927bead0d69640f8a336992b3cb;hpb=86a17d42a36c3272e993854b9bfa2276ae669324;p=ghc-base.git

diff --git a/GHC/STRef.lhs b/GHC/STRef.lhs
index 5eecb85..9824b15 100644
--- a/GHC/STRef.lhs
+++ b/GHC/STRef.lhs
@@ -1,5 +1,5 @@
 \begin{code}
-{-# OPTIONS -fno-implicit-prelude #-}
+{-# OPTIONS_GHC -fno-implicit-prelude #-}
 -----------------------------------------------------------------------------
 -- |
 -- Module      :  GHC.STRef
@@ -39,10 +39,6 @@ writeSTRef (STRef var#) val = ST $ \s1# ->
     case writeMutVar# var# val s1#      of { s2# ->
     (# s2#, () #) }
 
--- |Mutate the contents of an 'STRef'
-modifySTRef :: STRef s a -> (a -> a) -> ST s ()
-modifySTRef ref f = readSTRef ref >>= writeSTRef ref . f
-
 -- Just pointer equality on mutable references:
 instance Eq (STRef s a) where
     STRef v1# == STRef v2# = sameMutVar# v1# v2#