control-monad-free-0.6.1: Free monads and monad transformers
Control.Monad.Free.Zip
zipFree :: (Traversable f, Eq (f ()), Monad m) => (Free f a -> Free f b -> m (Free f c)) -> Free f a -> Free f b -> m (Free f c) Source
zipFree_ :: (Traversable f, Eq (f ()), Monad m) => (Free f a -> Free f b -> m ()) -> Free f a -> Free f b -> m () Source