ref: a4f5892f3b4aa79446f85e4b60f01564a1f18a9c
dir: /lib/Control/Arrow.hs/
module Control.Arrow(module Control.Arrow) where import Prelude() -- do not import Prelude first :: forall a b c . (a -> c) -> (a, b) -> (c, b) first f (a, b) = (f a, b) second :: forall a b c . (b -> c) -> (a, b) -> (a, c) second f (a, b) = (a, f b)