X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=Foreign%2FPtr.hs;h=8dd220f7699e1b3e53c4fd2c5c75d8e26a271bc7;hb=85ed71ab833a40f5acfeb4610a0aa3c3c3e1a35b;hp=a394074151f6af53bb8c3e2548f4404af27351d4;hpb=fc6c3c6e5a508b74bed8559c2e4ff6bf74b9ae92;p=ghc-base.git

diff --git a/Foreign/Ptr.hs b/Foreign/Ptr.hs
index a394074..8dd220f 100644
--- a/Foreign/Ptr.hs
+++ b/Foreign/Ptr.hs
@@ -1,4 +1,4 @@
-{-# OPTIONS_GHC -fno-implicit-prelude #-}
+{-# OPTIONS_GHC -XNoImplicitPrelude #-}
 -----------------------------------------------------------------------------
 -- |
 -- Module      :  Foreign.Ptr
@@ -50,7 +50,6 @@ module Foreign.Ptr (
 
 #ifdef __GLASGOW_HASKELL__
 import GHC.Ptr
-import GHC.IOBase
 import GHC.Base
 import GHC.Num
 import GHC.Read
@@ -59,7 +58,7 @@ import GHC.Show
 import GHC.Enum
 import GHC.Word         ( Word(..) )
 
-import Data.Int
+-- import Data.Int
 import Data.Word
 #else
 import Control.Monad    ( liftM )
@@ -67,7 +66,7 @@ import Foreign.C.Types
 #endif
 
 import Data.Bits
-import Data.Typeable    ( Typeable(..), mkTyCon, mkTyConApp )
+import Data.Typeable
 import Foreign.Storable ( Storable(..) )
 
 #ifdef __NHC__
@@ -106,12 +105,14 @@ 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