indexing
	description:
		"Evaluator to check if stack is empty"

	status:	"See note at end of class"
	date: "$Date$"
	revision: "$Revision$"

class EMPTY_STACK_EVALUATOR inherit

	EVALUATOR
		rename
			is_true as empty
		redefine
			test_step
		end

feature -- Status report

	empty: BOOLEAN is
			-- Is stack empty?
		do
			Result := test_step.stack.empty
		end

feature {NONE} -- Implementation

	test_step: POP_STEP
			-- Callback to test step

end -- class EMPTY_STACK_EVALUATOR

--|----------------------------------------------------------------------
--| EiffelTest: Reusable components for developing unit tests.
--| Copyright (C) 2000-2001 Interactive Software Engineering Inc (ISE).
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--| License (IFELL) at http://eiffel.com/products/base/license.html.
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