# File lib/cucumber/parser/feature.rb, line 222
      def _nt_tags
        start_index = index
        if node_cache[:tags].has_key?(index)
          cached = node_cache[:tags][index]
          @index = cached.interval.end if cached
          return cached
        end

        i0, s0 = index, []
        r1 = _nt_white
        s0 << r1
        if r1
          s2, i2 = [], index
          loop do
            i3, s3 = index, []
            r4 = _nt_tag
            s3 << r4
            if r4
              s5, i5 = [], index
              loop do
                i6 = index
                r7 = _nt_space
                if r7
                  r6 = r7
                else
                  r8 = _nt_eol
                  if r8
                    r6 = r8
                  else
                    @index = i6
                    r6 = nil
                  end
                end
                if r6
                  s5 << r6
                else
                  break
                end
              end
              if s5.empty?
                @index = i5
                r5 = nil
              else
                r5 = instantiate_node(SyntaxNode,input, i5...index, s5)
              end
              s3 << r5
            end
            if s3.last
              r3 = instantiate_node(SyntaxNode,input, i3...index, s3)
              r3.extend(Tags0)
            else
              @index = i3
              r3 = nil
            end
            if r3
              s2 << r3
            else
              break
            end
          end
          r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
          s0 << r2
        end
        if s0.last
          r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
          r0.extend(Tags1)
          r0.extend(Tags2)
        else
          @index = i0
          r0 = nil
        end

        node_cache[:tags][start_index] = r0

        r0
      end