note
	description: "Sequential lists, without commitment to a particular representation"
	library: "Free implementation of ELKS library"
	legal: "See notice at end of class."
	status: "See notice at end of class."
	names: list, sequence
	access: index, cursor, membership
	contents: generic
	date: "$Date: 2017-03-23 19:18:26 +0000 (Thu, 23 Mar 2017) $"
	revision: "$Revision: 100033 $"

deferred class interface
	LIST [G]

feature -- Comparison

	is_equal (other: like Current): BOOLEAN
			-- Does other contain the same elements?
		ensure then
			indices_unchanged: index = old index and other.index = old other.index
			true_implies_same_size: Result implies count = other.count
	
feature -- Status report

	after: BOOLEAN
			-- Is there no valid cursor position to the right of cursor?

	before: BOOLEAN
			-- Is there no valid cursor position to the left of cursor?
	
feature -- Cursor movement

	forth
			-- Move to next position; if no next position,
			-- ensure that exhausted will be true.
		ensure then
			moved_forth: index = old index + 1
	
invariant
	before_definition: before = (index = 0)
	after_definition: after = (index = count + 1)

note
	copyright: "Copyright (c) 1984-2017, 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 LIST

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