disambiguate uses of foldr for nhc98 to compile without errors

[haskell-directory.git] / Data / Tree.hs

diff --git a/Data/Tree.hs b/Data/Tree.hs
index f2a55f5..a7aab07 100644 (file)
--- a/Data/Tree.hs
+++ b/Data/Tree.hs
@@ -93,7 +93,7 @@ draw (Node x ts0) = x : drawSubTrees ts0
 -- | The elements of a tree in pre-order.
 flatten :: Tree a -> [a]
 flatten t = squish t []
-  where squish (Node x ts) xs = x:foldr squish xs ts
+  where squish (Node x ts) xs = x:Prelude.foldr squish xs ts
 
 -- | Lists of nodes at each level of the tree.
 levels :: Tree a -> [[a]]
@@ -120,7 +120,7 @@ unfoldTreeM f b = do
 #ifndef __NHC__
 unfoldForestM :: Monad m => (b -> m (a, [b])) -> [b] -> m (Forest a)
 #endif
-unfoldForestM f = mapM (unfoldTreeM f)
+unfoldForestM f = Prelude.mapM (unfoldTreeM f)
 
 -- | Monadic tree builder, in breadth-first order,
 -- using an algorithm adapted from
@@ -146,7 +146,7 @@ unfoldForestQ f aQ = case viewl aQ of
        EmptyL -> return empty
        a :< aQ -> do
                (b, as) <- f a
-               tQ <- unfoldForestQ f (foldl (|>) aQ as)
+               tQ <- unfoldForestQ f (Prelude.foldl (|>) aQ as)
                let (tQ', ts) = splitOnto [] as tQ
                return (Node b ts <| tQ')
   where splitOnto :: [a'] -> [b'] -> Seq a' -> (Seq a', [a'])