# Create a new SAXParseException from a message and a Locator.
	#
	# This constructor is especially useful when an application is
	# creating its own exception from within a `ContentHandler` callback.
	#
	# Parameters:
	#
	# * `message`: error or warning message.
	# * `locator`: locator object for the error or warning.
	init with_locator(message: String, locator: SAXLocator) do
		init(message)
		public_id = locator.public_id
		system_id = locator.system_id
		line_number = locator.line_number
		column_number = locator.column_number
	end