X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=Data%2FWord.hs;h=18300d2512c2d1a02557e706fc03cea775668159;hb=HEAD;hp=630855628b0fda02abc9dea8622919c46713d4d4;hpb=4aa4c78edf3cf4607ddeb669f536d646395ae9f0;p=ghc-base.git

diff --git a/Data/Word.hs b/Data/Word.hs
index 6308556..18300d2 100644
--- a/Data/Word.hs
+++ b/Data/Word.hs
@@ -1,4 +1,5 @@
-{-# OPTIONS -fno-implicit-prelude #-}
+{-# LANGUAGE CPP, NoImplicitPrelude #-}
+
 -----------------------------------------------------------------------------
 -- |
 -- Module      :  Data.Word
@@ -14,40 +15,50 @@
 -----------------------------------------------------------------------------
 
 module Data.Word
-  ( 
-	-- * Unsigned integral types
+  (
+        -- * Unsigned integral types
+
+        Word,
+        Word8, Word16, Word32, Word64,
 
-	Word,
-	Word8, Word16, Word32, Word64,
-	
-	-- * Notes
-	
-	-- $notes
-	) where
+        -- * Notes
+
+        -- $notes
+        ) where
 
 #ifdef __GLASGOW_HASKELL__
 import GHC.Word
 #endif
 
+#ifdef __HUGS__
+import Hugs.Word
+#endif
+
+#ifdef __NHC__
+import NHC.FFI (Word8, Word16, Word32, Word64)
+import NHC.SizedTypes (Word8, Word16, Word32, Word64)   -- instances of Bits
+type Word = Word32
+#endif
+
 {- $notes
 
 * All arithmetic is performed modulo 2^n, where n is the number of
-  bits in the type.  One non-obvious consequence of this is that 'negate'
+  bits in the type.  One non-obvious consequence of this is that 'Prelude.negate'
   should /not/ raise an error on negative arguments.
 
 * For coercing between any two integer types, use
-  'fromIntegral', which is specialized for all the
+  'Prelude.fromIntegral', which is specialized for all the
   common cases so should be fast enough.  Coercing word types to and
   from integer types preserves representation, not sign.
 
-* It would be very natural to add a type 'Natural' providing an unbounded 
-  size unsigned integer, just as 'Integer' provides unbounded
+* It would be very natural to add a type @Natural@ providing an unbounded 
+  size unsigned integer, just as 'Prelude.Integer' provides unbounded
   size signed integers.  We do not do that yet since there is no demand
   for it.
 
-* The rules that hold for 'Enum' instances over a bounded type
-  such as 'Int' (see the section of the Haskell report dealing
-  with arithmetic sequences) also hold for the 'Enum' instances
+* The rules that hold for 'Prelude.Enum' instances over a bounded type
+  such as 'Prelude.Int' (see the section of the Haskell report dealing
+  with arithmetic sequences) also hold for the 'Prelude.Enum' instances
   over the various 'Word' types defined here.
 
 * Right and left shifts by amounts greater than or equal to the width