indexing
	description: "Regions (RGN) constants."
	status: "See notice at end of class."
	date: "$Date$"
	revision: "$Revision$"

class interface
	WEL_RGN_CONSTANTS

feature -- Access

	rgn_and: INTEGER

	rgn_copy: INTEGER

	rgn_diff: INTEGER

	rgn_or: INTEGER

	rgn_xor: INTEGER
	
feature -- Status report

	valid_region_constant (c: INTEGER): BOOLEAN
			-- Is c a valid region constant?
	
invariant

		-- from ANY
	reflexive_equality: standard_is_equal (Current)
	reflexive_conformance: conforms_to (Current)

end -- class WEL_RGN_CONSTANTS