{α : Type} →
  [Lean.Compiler.LCNF.Simp.ConstantFold.Literal α] →
    [BEq α] →
      (annihilator zero : α) →
        (op : α → α → α) →
          autoParam (∀ (x : α), op x annihilator = zero)
              Lean.Compiler.LCNF.Simp.ConstantFold.Folder.rightAnnihilator._auto_1 →
            Lean.Compiler.LCNF.Simp.ConstantFold.Folder