# File lib/treetop/compiler/metagrammar.rb, line 1589
      def _nt_suffix
        start_index = index
        if node_cache[:suffix].has_key?(index)
          cached = node_cache[:suffix][index]
          @index = cached.interval.end if cached
          return cached
        end

        i0 = index
        r1 = _nt_repetition_suffix
        if r1
          r0 = r1
        else
          r2 = _nt_optional_suffix
          if r2
            r0 = r2
          else
            self.index = i0
            r0 = nil
          end
        end

        node_cache[:suffix][start_index] = r0

        return r0
      end