X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=Foreign%2FPtr.hs;h=b46acc1bea1d9f2602230fdc3753912ed762e344;hb=8bb6db3e726aa1eeb6d512bfb5165f9f9f92210c;hp=f6fac7d550b7ac60fae613a935b2a72977e2470b;hpb=d2063b5b0be014545b21819172c87756efcb0b0c;p=ghc-base.git

diff --git a/Foreign/Ptr.hs b/Foreign/Ptr.hs
index f6fac7d..b46acc1 100644
--- a/Foreign/Ptr.hs
+++ b/Foreign/Ptr.hs
@@ -1,4 +1,10 @@
-{-# OPTIONS_GHC -XNoImplicitPrelude #-}
+{-# LANGUAGE CPP
+           , NoImplicitPrelude
+           , ForeignFunctionInterface
+           , MagicHash
+           , GeneralizedNewtypeDeriving
+  #-}
+
 -----------------------------------------------------------------------------
 -- |
 -- Module      :  Foreign.Ptr
@@ -50,7 +56,6 @@ module Foreign.Ptr (
 
 #ifdef __GLASGOW_HASKELL__
 import GHC.Ptr
-import GHC.IO
 import GHC.Base
 import GHC.Num
 import GHC.Read
@@ -59,7 +64,7 @@ import GHC.Show
 import GHC.Enum
 import GHC.Word         ( Word(..) )
 
-import Data.Int
+-- import Data.Int
 import Data.Word
 #else
 import Control.Monad    ( liftM )
@@ -106,12 +111,14 @@ foreign import ccall unsafe "freeHaskellFunctionPtr"
 
 # ifdef __GLASGOW_HASKELL__
 -- | An unsigned integral type that can be losslessly converted to and from
--- @Ptr@.
+-- @Ptr@. This type is also compatible with the C99 type @uintptr_t@, and
+-- can be marshalled to and from that type safely.
 INTEGRAL_TYPE(WordPtr,tyConWordPtr,"WordPtr",Word)
         -- Word and Int are guaranteed pointer-sized in GHC
 
 -- | A signed integral type that can be losslessly converted to and from
--- @Ptr@.
+-- @Ptr@.  This type is also compatible with the C99 type @intptr_t@, and
+-- can be marshalled to and from that type safely.
 INTEGRAL_TYPE(IntPtr,tyConIntPtr,"IntPtr",Int)
         -- Word and Int are guaranteed pointer-sized in GHC