class
	EL_IMMUTABLE_8_MANAGER

inherit
	EL_IMMUTABLE_STRING_MANAGER [CHARACTER_8, READABLE_STRING_8, IMMUTABLE_STRING_8]
		undefine
			bit_count
		end

	EL_STRING_8_BIT_COUNTABLE [IMMUTABLE_STRING_8]

feature {NONE} -- Initialization

	initialize
		do
		-- cannot use shared extended string because it will cause a circular call
			create extended_string.make_empty
		end

feature -- Status query

	item_has_left_padding: BOOLEAN
		do
			Result := item.count > 0 and then item [1].is_space
		end

	item_has_right_padding: BOOLEAN
		do
			Result := item.count > 0 and then item [item.count].is_space
		end

feature {NONE} -- Implementation

	is_space (a_area: SPECIAL [CHARACTER_8]; i: INTEGER): BOOLEAN
		do
			Result := a_area [i].is_space
		end

	new_immutable_substring (str: IMMUTABLE_STRING_8; start_index, end_index: INTEGER): IMMUTABLE_STRING_8
		do
			Result := str.shared_substring (start_index, end_index)
		end

	string_area (str: READABLE_STRING_8): SPECIAL [CHARACTER_8]
		do
			if attached {STRING_8} str as str_8 then
				Result := str_8.area
			else
				Result := str.as_string_8.area
			end
		end

feature {NONE} -- Internal attributes

	extended_string: EL_READABLE_STRING_8

feature {NONE} -- Constants

	Shared_field_table: SPECIAL [INTEGER]
		once
			Result := new_field_table
		end

end