generic
    type Item is private;
package Set_Simple_Sequential_Unbounded_Unmanaged_Noniterator is

    type Set is limited private;

    procedure Copy (From_The_Set : in Set; To_The_Set : in out Set);
    procedure Clear (The_Set : in out Set);
    procedure Add (The_Item : in Item; To_The_Set : in out Set);
    procedure Remove (The_Item : in Item; From_The_Set : in out Set);
    procedure Union (Of_The_Set : in Set;
                     And_The_Set : in Set;
                     To_The_Set : in out Set);
    procedure Intersection (Of_The_Set : in Set;
                            And_The_Set : in Set;
                            To_The_Set : in out Set);
    procedure Difference (Of_The_Set : in Set;
                          And_The_Set : in Set;
                          To_The_Set : in out Set);

    function Is_Equal (Left : in Set; Right : in Set) return Boolean;
    function Extent_Of (The_Set : in Set) return Natural;
    function Is_Empty (The_Set : in Set) return Boolean;
    function Is_A_Member
                (The_Item : in Item; Of_The_Set : in Set) return Boolean;
    function Is_A_Subset (Left : in Set; Right : in Set) return Boolean;
    function Is_A_Proper_Subset (Left : in Set; Right : in Set) return Boolean;

    Overflow : exception;
    Item_Is_In_Set : exception;
    Item_Is_Not_In_Set : exception;

private
    type Node;
    type Set is access Node;
end Set_Simple_Sequential_Unbounded_Unmanaged_Noniterator;