Hugs now gets MonadFix(mfix) from its prelude

diff --git a/Control/Monad/Fix.hs b/Control/Monad/Fix.hs
index ea481d8..6196f73 100644 (file)
--- a/Control/Monad/Fix.hs
+++ b/Control/Monad/Fix.hs
@@ -26,7 +26,11 @@ import Prelude
 import System.IO
 import Control.Monad.Instances ()
 import Data.Function (fix)
+#ifdef __HUGS__
+import Hugs.Prelude (MonadFix(mfix))
+#endif
 
+#ifndef __HUGS__
 -- | Monads having fixed points with a \'knot-tying\' semantics.
 -- Instances of 'MonadFix' should satisfy the following laws:
 --
@@ -51,6 +55,7 @@ class (Monad m) => MonadFix m where
        -- output fed back as the input.  Hence @f@ should not be strict,
        -- for then @'mfix' f@ would diverge.
        mfix :: (a -> m a) -> m a
+#endif /* !__HUGS__ */
 
 -- Instances of MonadFix for Prelude monads