tests/functor.lac


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signature S = sig
        type t
        val z : t
        val s : t -> t
end

signature T = sig
        type t
        val three : t
end

functor F (M : S) : T where type t = M.t = struct
        type t = M.t
        val three = M.s (M.s (M.s M.z))
end