End MakeRaw.
(** * Encapsulation  Now, in order to really provide a functor implementing [S], we need to encapsulate everything into a type of strictly ordered lists. *)
Module Make (X: OrderedType) <: S with Module E := X.
Module Raw := MakeRaw X.
Include Raw2Sets X Raw.
End Make.
(** For this specific implementation, eq coincides with Leibniz equality *)
Require Eqdep_dec.
Module Type OrderedTypeWithLeibniz.
Include OrderedType.
Parameter eq_leibniz : forall x y, eq x y -> x = y.
End OrderedTypeWithLeibniz.
Module Type SWithLeibniz.
Declare Module E : OrderedTypeWithLeibniz.
Include SetsOn E.
Parameter eq_leibniz : forall x y, eq x y -> x = y.
End SWithLeibniz.
Module MakeWithLeibniz (X: OrderedTypeWithLeibniz) <: SWithLeibniz with Module E := X.
Module E := X.
Module Raw := MakeRaw X.
Include Raw2SetsOn X Raw.

Lemma eq_leibniz_list : forall xs ys, eqlistA X.eq xs ys -> xs = ys.