# File lib/racc/grammar.rb, line 228
      def method_missing(mid, *args, &block)
        unless mid.to_s[-1,1] == '='
          super   # raises NoMethodError
        end
        target = @grammar.intern(mid.to_s.chop.intern)
        unless args.size == 1
          raise ArgumentError, "too many arguments for #{mid} (#{args.size} for 1)"
        end
        _add target, args.first
      end