I have a function f :: a -> Maybe a that I want to feed into itself with some initial input until it returns Nothing.untilNothing :: (a -> Maybe a) -> a -> a
untilNothing f x = case f x of
Just x' -> untilNothing f x'
Nothing -> x
Is there a better way to do this? I feel like there is something more general going on with Monads being fed into themselves, but maybe I'm wrong. Thoughts?