note
	description: "Sets represented as arrayed lists"
	library: "Free implementation of ELKS library"
	legal: "See notice at end of class."
	status: "See notice at end of class."
	names: arrayed_set, set, arrayed_list
	representation: array
	size: fixed
	access: membership
	contents: generic
	date: "$Date: 2019-07-05 15:26:16 +0000 (Fri, 05 Jul 2019) $"
	revision: "$Revision: 103325 $"

class 
	ARRAYED_SET [G]

inherit
	LINEAR_SUBSET [G]
		undefine
			prune_all,
			copy,
			is_equal,
			fill
		select
			extend,
			put,
			prune
		end

	ARRAYED_LIST [G]
		rename
			extend as al_extend,
			has as has alias "∋",
			put as al_put,
			prune as al_prune
		export
			{ANY} valid_cursor_index, readable, writable, to_array, new_cursor
			{ARRAYED_SET} go_to, area, area_v2, cursor, full, i_th, Lower, valid_cursor
			{NONE} all
		undefine
			is_inserted,
			changeable_comparison_criterion
		redefine
			make_from_iterable
		end

create 
	make,
	make_from_iterable


create {ARRAYED_SET}
	make_filled

feature {NONE} -- Creation

	make_from_iterable (other: ITERABLE [G])
			-- Create a circular chain with all items obtained from other.
		do
			make (estimated_count_of (other))
			across
				other as o
			loop
				extend (o.item)
			end
		end
	
feature -- Element change

	put (v: G)
			-- Insert v if not present.
			-- Was declared in ARRAYED_SET as synonym of extend.
		do
			if is_empty or else not has (v) then
				al_extend (v)
			end
		end

	extend (v: G)
			-- Insert v if not present.
			-- Was declared in ARRAYED_SET as synonym of put.
		do
			if is_empty or else not has (v) then
				al_extend (v)
			end
		end
	
feature -- Removal

	prune (v: like item)
			-- Remove v if present.
		do
			start
			al_prune (v)
		end
	
note
	copyright: "Copyright (c) 1984-2019, Eiffel Software and others"
	license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
	source: "[
		Eiffel Software
		5949 Hollister Ave., Goleta, CA 93117 USA
		Telephone 805-685-1006, Fax 805-685-6869
		Website http://www.eiffel.com
		Customer support http://support.eiffel.com
	]"

end -- class ARRAYED_SET

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