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deferred class
	CURSOR_TREE_ITERATOR [G]

General
	cluster: elks
	description: 
		"Objects that are able to iterate over cursor trees, 
		on which they can perform repeated actions and tests according
		to a number of predefined control structures such as if,
		until and others."

Ancestors
	LINEAR_ITERATOR [G]
	LINEAR_ITERATOR [G]
	LINEAR_ITERATOR [G]

Queries
	breadth_for_all (test: FUNCTION [G, BOOLEAN]): BOOLEAN
	breadth_there_exists (test: FUNCTION [G, BOOLEAN]): BOOLEAN
	exhausted: BOOLEAN
	invariant_value: BOOLEAN
	item: G
	item_tuple: TUPLE [G]
	off: BOOLEAN
	post_for_all (test: FUNCTION [G, BOOLEAN]): BOOLEAN
	post_there_exists (test: FUNCTION [G, BOOLEAN]): BOOLEAN
	pre_for_all (test: FUNCTION [G, BOOLEAN]): BOOLEAN
	pre_there_exists (test: FUNCTION [G, BOOLEAN]): BOOLEAN
	target: CURSOR_TREE [G]

Commands
	breadth_continue_for (action: PROCEDURE [G]; n, k: INTEGER_32)
	breadth_continue_search (test: FUNCTION [G, BOOLEAN]; b: BOOLEAN)
	breadth_continue_until (action: PROCEDURE [G]; test: FUNCTION [G, BOOLEAN])
	breadth_continue_while (action: PROCEDURE [G]; test: FUNCTION [G, BOOLEAN])
	breadth_do_all (action: PROCEDURE [G])
	breadth_do_for (action: PROCEDURE [G]; i, n, k: INTEGER_32)
	breadth_do_if (action: PROCEDURE [G]; test: FUNCTION [G, BOOLEAN])
	breadth_do_until (action: PROCEDURE [G]; test: FUNCTION [G, BOOLEAN])
	breadth_do_while (action: PROCEDURE [G]; test: FUNCTION [G, BOOLEAN])
	breadth_forth
	breadth_search (test: FUNCTION [G, BOOLEAN]; b: BOOLEAN)
	breadth_start
	breadth_until_do (action: PROCEDURE [G]; test: FUNCTION [G, BOOLEAN])
	breadth_while_continue (action: PROCEDURE [G]; test: FUNCTION [G, BOOLEAN])
	breadth_while_do (action: PROCEDURE [G]; test: FUNCTION [G, BOOLEAN])
	post_continue_for (action: PROCEDURE [G]; n, k: INTEGER_32)
	post_continue_search (test: FUNCTION [G, BOOLEAN]; b: BOOLEAN)
	post_continue_until (action: PROCEDURE [G]; test: FUNCTION [G, BOOLEAN])
	post_continue_while (action: PROCEDURE [G]; test: FUNCTION [G, BOOLEAN])
	post_do_all (action: PROCEDURE [G])
	post_do_for (action: PROCEDURE [G]; i, n, k: INTEGER_32)
	post_do_if (action: PROCEDURE [G]; test: FUNCTION [G, BOOLEAN])
	post_do_until (action: PROCEDURE [G]; test: FUNCTION [G, BOOLEAN])
	post_do_while (action: PROCEDURE [G]; test: FUNCTION [G, BOOLEAN])
	post_forth
	post_search (test: FUNCTION [G, BOOLEAN]; b: BOOLEAN)
	post_start
	post_until_do (action: PROCEDURE [G]; test: FUNCTION [G, BOOLEAN])
	post_while_continue (action: PROCEDURE [G]; test: FUNCTION [G, BOOLEAN])
	post_while_do (action: PROCEDURE [G]; test: FUNCTION [G, BOOLEAN])
	pre_continue_for (action: PROCEDURE [G]; n, k: INTEGER_32)
	pre_continue_search (test: FUNCTION [G, BOOLEAN]; b: BOOLEAN)
	pre_continue_until (action: PROCEDURE [G]; test: FUNCTION [G, BOOLEAN])
	pre_continue_while (action: PROCEDURE [G]; test: FUNCTION [G, BOOLEAN])
	pre_do_all (action: PROCEDURE [G])
	pre_do_for (action: PROCEDURE [G]; i, n, k: INTEGER_32)
	pre_do_if (action: PROCEDURE [G]; test: FUNCTION [G, BOOLEAN])
	pre_do_until (action: PROCEDURE [G]; test: FUNCTION [G, BOOLEAN])
	pre_do_while (action: PROCEDURE [G]; test: FUNCTION [G, BOOLEAN])
	pre_forth
	pre_search (test: FUNCTION [G, BOOLEAN]; b: BOOLEAN)
	pre_start
	pre_until_do (action: PROCEDURE [G]; test: FUNCTION [G, BOOLEAN])
	pre_while_continue (action: PROCEDURE [G]; test: FUNCTION [G, BOOLEAN])
	pre_while_do (action: PROCEDURE [G]; test: FUNCTION [G, BOOLEAN])
	set (s: [like target] CURSOR_TREE [G])
	start
	until_continue (action: PROCEDURE [G]; test: FUNCTION [G, BOOLEAN])



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