# File rexml/xpath_parser.rb, line 200
  def UnaryExpr path, nodeset
			#puts "UnaryExpr( #{path}, #{puta nodeset} )" if DEBUG
			mult = 1 if path[0] == ?-
			while path[0] == ?-
				mult *= -1
				path = path[1..-1]
			end
			rest, results = UnionExpr( path, nodeset )
			join( results, [mult] ) {|a,o,b| a*b} if mult
			[rest, results]
		end