X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=Data%2FMonoid.hs;h=aaefd42169c7bdc85ba028ddd1d1df4aeda4089b;hb=HEAD;hp=65e3bb76d770999e349df511b9303765bbb06d8b;hpb=4d9023e9281493aea632196980543dfdedfd9910;p=ghc-base.git

diff --git a/Data/Monoid.hs b/Data/Monoid.hs
index 65e3bb7..aaefd42 100644
--- a/Data/Monoid.hs
+++ b/Data/Monoid.hs
@@ -1,3 +1,5 @@
+{-# LANGUAGE CPP, NoImplicitPrelude #-}
+
 -----------------------------------------------------------------------------
 -- |
 -- Module      :  Data.Monoid
@@ -30,7 +32,17 @@ module Data.Monoid (
         Last(..)
   ) where
 
+-- Push down the module in the dependency hierarchy.
+#if defined(__GLASGOW_HASKELL__)
+import GHC.Base hiding (Any)
+import GHC.Enum
+import GHC.Num
+import GHC.Read
+import GHC.Show
+import Data.Maybe
+#else
 import Prelude
+#endif
 
 {-
 -- just for testing
@@ -42,11 +54,11 @@ import Test.QuickCheck
 -- | The class of monoids (types with an associative binary operation that
 -- has an identity).  Instances should satisfy the following laws:
 --
---  * @mempty `mappend` x = x@
+--  * @mappend mempty x = x@
 --
---  * @x `mappend` mempty = x@
+--  * @mappend x mempty = x@
 --
---  * @x `mappend` (y `mappend` z) = (x `mappend` y) `mappend` z@
+--  * @mappend x (mappend y z) = mappend (mappend x y) z@
 --
 --  * @mconcat = 'foldr' mappend mempty@
 --