(motive : Option Lean.ConstantInfo → Sort u_1) →
  (x : Option Lean.ConstantInfo) →
    ((val : Lean.ConstructorVal) → motive (some (Lean.ConstantInfo.ctorInfo val))) →
      ((val : Lean.ConstantInfo) → motive (some val)) → (Unit → motive none) → motive x