Use explicit language extensions & remove extension fields from base.cabal

[ghc-base.git] / GHC / Weak.lhs

diff --git a/GHC/Weak.lhs b/GHC/Weak.lhs
index 6db5b5c..67046f8 100644 (file)
--- a/GHC/Weak.lhs
+++ b/GHC/Weak.lhs
@@ -1,6 +1,12 @@
 \begin{code}
-{-# OPTIONS_GHC -XNoImplicitPrelude #-}
+{-# LANGUAGE CPP
+           , NoImplicitPrelude
+           , BangPatterns
+           , MagicHash
+           , UnboxedTuples
+  #-}
 {-# OPTIONS_HADDOCK hide #-}
+
 -----------------------------------------------------------------------------
 -- |
 -- Module      :  GHC.Weak
@@ -20,7 +26,6 @@ module GHC.Weak where
 
 import GHC.Base
 import Data.Maybe
-import GHC.IOBase       ( IO(..), unIO )
 import Data.Typeable
 
 {-|
@@ -123,7 +128,7 @@ runFinalizerBatch (I# n) arr =
    let  go m  = IO $ \s ->
                   case m of 
                   0# -> (# s, () #)
-                  _  -> let m' = m -# 1# in
+                  _  -> let !m' = m -# 1# in
                         case indexArray# arr m' of { (# io #) -> 
                         case unIO io s of          { (# s', _ #) -> 
                         unIO (go m') s'