module Case;
  open import Stdlib.Prelude;

  isZero : Nat → Bool;
  isZero n := case n
      | zero := true
      | k@(suc _) := false;

  id' : Bool → {A : Type} → A → A;
  id' b := case b
      | true := id
      | false := id;

  pred : Nat → Nat;
  pred n := case n
      | zero := zero
      | suc n := n;

  appIf : {A : Type} → Bool → (A → A) → A → A;
  appIf b f := case b
      | true := f
      | false := id;

  appIf2 : {A : Type} → Bool → (A → A) → A → A;
  appIf2 b f a := (case b
        | true := f
        | false := id)
    a;

  nestedCase1 : {A : Type} → Bool → (A → A) → A → A;
  nestedCase1 b f := case b
      | true := (case b
        | _ := id)
      | false := id;
end;