Can we get generateA?

[treeowl]

generateA :: Applicative f => Int -> (Int -> f a) -> f (Vector a)
-- specification
generateA n f = sequenceA (generate n f)

The Monad m constraint on generateM seems to flow from unstreamM. unstreamM, in turn, absolutely requires a Monad m constraint because of the way general streams are structured. For generating vectors, this all seems a bit sad, since the exact shape of the result stream is known in advance (a specific number of Yields followed by Done). I don't know that there's any way around that annoyance.