module Haskell.Prim.Maybe where -------------------------------------------------- -- Maybe data Maybe {@0 ℓ} (a : Set ℓ) : Set ℓ where Nothing : Maybe a Just : a -> Maybe a maybe : ∀ {@0 ℓ₁ ℓ₂} {@0 a : Set ℓ₁} {@0 b : Set ℓ₂} → b → (a → b) → Maybe a → b maybe n j Nothing = n maybe n j (Just x) = j x