X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=Data%2FEither.hs;h=20dfe47ef5f745ed7b8d0a28dec615fac03e4ed8;hb=d9e5fa673b75cdffbcd0e85cdcc98d706acbb29a;hp=f3cd10665590c3bac229e32e91231d52c4f46b3c;hpb=7f1f4e7a695c402ddd3a1dc2cc7114e649a78ebc;p=ghc-base.git

diff --git a/Data/Either.hs b/Data/Either.hs
index f3cd106..20dfe47 100644
--- a/Data/Either.hs
+++ b/Data/Either.hs
@@ -7,9 +7,9 @@
 -- 
 -- Maintainer  :  libraries@haskell.org
 -- Stability   :  experimental
--- Portability :  non-portable
+-- Portability :  portable
 --
--- $Id: Either.hs,v 1.1 2001/06/28 14:15:02 simonmar Exp $
+-- $Id: Either.hs,v 1.3 2001/07/03 14:13:32 simonmar Exp $
 --
 -- The Either type, and associated operations.
 --
@@ -21,5 +21,11 @@ module Data.Either (
  ) where
 
 #ifdef __GLASGOW_HASKELL__
-import GHC.Maybe
+import GHC.Base
 #endif
+
+data  Either a b  =  Left a | Right b	deriving (Eq, Ord )
+
+either                  :: (a -> c) -> (b -> c) -> Either a b -> c
+either f _ (Left x)     =  f x
+either _ g (Right y)    =  g y