X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=Data%2FTuple.hs;h=a1495854a5982aa2ae141848a4de544de871bc83;hb=49283ebbb8870082ed2da7f2f564ab890a248e5f;hp=88d2c67fa5202860fb6becec0b8bcff190117a67;hpb=c0bf3d8da1e85d3dcaf94434b9fc46304ec7b39a;p=ghc-base.git

diff --git a/Data/Tuple.hs b/Data/Tuple.hs
index 88d2c67..a149585 100644
--- a/Data/Tuple.hs
+++ b/Data/Tuple.hs
@@ -1,4 +1,4 @@
-{-# OPTIONS -fno-implicit-prelude #-}
+{-# OPTIONS_GHC -fno-implicit-prelude #-}
 -----------------------------------------------------------------------------
 -- |
 -- Module      :  Data.Tuple
@@ -13,18 +13,60 @@
 --
 -----------------------------------------------------------------------------
 
-module Data.Tuple (
-	  fst		-- :: (a,b) -> a
-	, snd		-- :: (a,b) -> a
-	, curry		-- :: ((a, b) -> c) -> a -> b -> c
-	, uncurry	-- :: (a -> b -> c) -> ((a, b) -> c)
-  ) where
+module Data.Tuple
+  ( fst		-- :: (a,b) -> a
+  , snd		-- :: (a,b) -> a
+  , curry	-- :: ((a, b) -> c) -> a -> b -> c
+  , uncurry	-- :: (a -> b -> c) -> ((a, b) -> c)
+#ifdef __NHC__
+  , (,)(..)
+  , (,,)(..)
+  , (,,,)(..)
+  , (,,,,)(..)
+  , (,,,,,)(..)
+  , (,,,,,,)(..)
+  , (,,,,,,,)(..)
+  , (,,,,,,,,)(..)
+  , (,,,,,,,,,)(..)
+  , (,,,,,,,,,,)(..)
+  , (,,,,,,,,,,,)(..)
+  , (,,,,,,,,,,,,)(..)
+  , (,,,,,,,,,,,,,)(..)
+  , (,,,,,,,,,,,,,,)(..)
+#endif
+  )
+    where
 
 #ifdef __GLASGOW_HASKELL__
 import GHC.Base
+#endif  /* __GLASGOW_HASKELL__ */
+
+#ifdef __NHC__
+import Prelude
+import Prelude
+  ( (,)(..)
+  , (,,)(..)
+  , (,,,)(..)
+  , (,,,,)(..)
+  , (,,,,,)(..)
+  , (,,,,,,)(..)
+  , (,,,,,,,)(..)
+  , (,,,,,,,,)(..)
+  , (,,,,,,,,,)(..)
+  , (,,,,,,,,,,)(..)
+  , (,,,,,,,,,,,)(..)
+  , (,,,,,,,,,,,,)(..)
+  , (,,,,,,,,,,,,,)(..)
+  , (,,,,,,,,,,,,,,)(..)
+  -- nhc98's prelude only supplies tuple instances up to size 15
+  , fst, snd
+  , curry, uncurry
+  )
+#endif
 
 default ()		-- Double isn't available yet
 
+#ifdef __GLASGOW_HASKELL__
 data (,) a b = (,) a b deriving (Eq, Ord)
 data (,,) a b c = (,,) a b c deriving (Eq, Ord)
 data (,,,) a b c d = (,,,) a b c d deriving (Eq, Ord)
@@ -215,18 +257,20 @@ data (,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
 -- ---------------------------------------------------------------------------
 -- Standard functions over tuples
 
-#ifndef __HUGS__
+#if !defined(__HUGS__) && !defined(__NHC__)
+-- | Extract the first component of a pair.
 fst			:: (a,b) -> a
 fst (x,_)		=  x
 
+-- | Extract the second component of a pair.
 snd			:: (a,b) -> b
 snd (_,y)		=  y
 
--- curry converts an uncurried function to a curried function;
--- uncurry converts a curried function to a function on pairs.
+-- | 'curry' converts an uncurried function to a curried function.
 curry                   :: ((a, b) -> c) -> a -> b -> c
 curry f x y             =  f (x, y)
 
+-- | 'uncurry' converts a curried function to a function on pairs.
 uncurry                 :: (a -> b -> c) -> ((a, b) -> c)
 uncurry f p             =  f (fst p) (snd p)
-#endif  /* __HUGS__ */
+#endif  /* neither __HUGS__ nor __NHC__ */