indexing
	description: 
		"AST representation of a class invariant."
	date: "$Date$"
	revision: "$Revision$"

class
	INVARIANT_AS

inherit
	AST_EIFFEL

feature {AST_FACTORY} -- Initialization

	initialize (a: like assertion_list) is
			-- Create a new INVARIANT AST node.
		do
			assertion_list := a
		ensure
			assertion_list_set: assertion_list = a
		end

feature -- Visitor

	process (v: AST_VISITOR) is
			-- process current element.
		do
			v.process_invariant_as (Current)
		end

feature -- Attributes

	assertion_list: EIFFEL_LIST [TAGGED_AS]
			-- Assertion list

feature -- Comparison

	is_equivalent (other: like Current): BOOLEAN is
			-- Is `other' equivalent to the current object ?
		do
				-- FIXME: optimize (order doesn't matter)
			Result := equivalent (assertion_list, other.assertion_list)
		end

--feature {AST_EIFFEL} -- Output
--
--	simple_format (ctxt: FORMAT_CONTEXT) is
--			-- Reconstitute text.
--		do
--			ctxt.put_text_item (ti_Invariant_keyword);
--			ctxt.indent;
--			ctxt.new_line;
--			ctxt.set_separator (ti_Semi_colon);
--			ctxt.set_new_line_between_tokens;
--			if assertion_list /= Void then
--				simple_format_assertions (ctxt);
--				ctxt.new_line;
--				ctxt.new_line;
--			end
--			ctxt.exdent;
--		end
--
--	simple_format_assertions (ctxt: FORMAT_CONTEXT) is
--			-- Format assertions of this invariant.
--		local
--			i, l_count: INTEGER;
--			not_first: BOOLEAN
--		do
--			ctxt.begin;
--			from
--				i := 1;
--				l_count := assertion_list.count;
--			until
--				i > l_count
--			loop
--				if not_first then
--					ctxt.put_separator;
--				end
--				ctxt.new_expression;
--				assertion_list.i_th(i).simple_format(ctxt);
--				not_first := True
--				i := i + 1
--			end
--			ctxt.commit;
--		end

feature	-- Duplication

	set_assertion_list (a: like assertion_list) is
		do
			assertion_list := a
		end

end -- class INVARIANT_AS