X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=Data%2FFoldable.hs;h=096a3470c71b7f70fb03ad244494b339978cfcfe;hb=a2a70b9bf60672c72b35654105402cf21238b6f4;hp=1111a3747cfd57a9dd7488afe8a283dbefdc0269;hpb=19685800646d947586b0900b8ad63fed9d02e577;p=haskell-directory.git

diff --git a/Data/Foldable.hs b/Data/Foldable.hs
index 1111a37..096a347 100644
--- a/Data/Foldable.hs
+++ b/Data/Foldable.hs
@@ -65,6 +65,10 @@ import Data.Maybe (fromMaybe, listToMaybe)
 import Data.Monoid
 import Data.Array
 
+#ifdef __NHC__
+import Control.Arrow (ArrowZero(..)) -- work around nhc98 typechecker problem
+#endif
+
 #ifdef __GLASGOW_HASKELL__
 import GHC.Exts (build)
 #endif
@@ -181,7 +185,7 @@ for_ :: (Foldable t, Applicative f) => t a -> (a -> f b) -> f ()
 {-# INLINE for_ #-}
 for_ = flip traverse_
 
--- | Map each element of a structure to an monadic action, evaluate
+-- | Map each element of a structure to a monadic action, evaluate
 -- these actions from left to right, and ignore the results.
 mapM_ :: (Foldable t, Monad m) => (a -> m b) -> t a -> m ()
 mapM_ f = foldr ((>>) . f) (return ())