Idris2/tests/idris2/literate/literate011/IEdit.md

data Vect : Nat -> Type -> Type where
     Nil : Vect Z a
     (::) : a -> Vect k a -> Vect (S k) a

dupAll : Vect n a -> Vect n (a, a)
dupAll xs = zipHere xs xs
  where
    zipHere : forall n . Vect n a -> Vect n b -> Vect n (a, b)

showFooBar : Foobar -> String
showFooBar MkFoo = "MkFoo"