note
	description: "External iteration cursor on READABLE_STRING_GENERAL based on CHARACTER_32 item."
	date: "$Date: 2016-04-16 10:44:12 +0000 (Sat, 16 Apr 2016) $"
	revision: "$Revision: 98623 $"

class interface
	STRING_ITERATION_CURSOR

create 
	make,
	make_from_substring

feature -- Initialization

	make (t: like target)
			-- Initialize cursor for target t.
		require
			t_attached: t /= Void

	make_from_substring (t: like target; start_pos, end_pos: INTEGER_32)
			-- Initialize cursor for target t, with a substring containing all characters at indices
			-- between start_pos and end_pos.
		require
			t_attached: t /= Void
			start_position_big_enough: start_pos >= 1
			end_position_big_enough: start_pos <= end_pos + 1
		ensure
			target_set: target = t
			starting_index_set: start_index = start_pos
			target_index_set: target_index = start_index
			end_index_set: end_index = end_pos
	
feature -- Access

	item: CHARACTER_32
			-- Item at current cursor position.

	target_index: INTEGER_32
			-- Index position of target for current iteration.

	new_cursor: STRING_ITERATION_CURSOR
			-- Restarted copy of Current.
	
feature -- Status Report

	after: BOOLEAN
			-- Are there no more items to iterate over?
	
feature -- Cursor movement

	start
			-- Move to first position.
		ensure
			target_index_set_to_one: target_index = start_index

	forth
			-- Move to next position.
		ensure then
			target_index_advanced: target_index = old target_index + 1
	
invariant
	target_attached: target /= Void
	target_index_big_enough: target_index >= start_index
	target_index_small_enough: target_index <= end_index + 1

note
	copyright: "Copyright (c) 1984-2016, 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 STRING_ITERATION_CURSOR

Generated by ISE EiffelStudio