# File lib/cucumber/parser/feature.rb, line 415
      def _nt_comment_line
        start_index = index
        if node_cache[:comment_line].has_key?(index)
          cached = node_cache[:comment_line][index]
          @index = cached.interval.end if cached
          return cached
        end

        i0, s0 = index, []
        s1, i1 = [], index
        loop do
          r2 = _nt_space
          if r2
            s1 << r2
          else
            break
          end
        end
        r1 = instantiate_node(SyntaxNode,input, i1...index, s1)
        s0 << r1
        if r1
          if has_terminal?('#', false, index)
            r3 = instantiate_node(SyntaxNode,input, index...(index + 1))
            @index += 1
          else
            terminal_parse_failure('#')
            r3 = nil
          end
          s0 << r3
          if r3
            r4 = _nt_line_to_eol
            s0 << r4
          end
        end
        if s0.last
          r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
          r0.extend(CommentLine0)
        else
          @index = i0
          r0 = nil
        end

        node_cache[:comment_line][start_index] = r0

        r0
      end