module SignatureWithBody;

import Stdlib.Prelude open;

isNull : {A : Type} → List A → Bool :=
  λ{
    | nil := true
    | _ := false
  };

isNull' : {A : Type} → List A → Bool :=
  let
    aux : {A : Type} → List A → Bool :=
      λ{
        | nil := true
        | _ := false
      };
  in aux;