# File lib/treetop/compiler/metagrammar.rb, line 2035
      def _nt_double_quoted_string
        start_index = index
        if node_cache[:double_quoted_string].has_key?(index)
          cached = node_cache[:double_quoted_string][index]
          @index = cached.interval.end if cached
          return cached
        end

        i0, s0 = index, []
        if input.index('"', index) == index
          r1 = instantiate_node(SyntaxNode,input, index...(index + 1))
          @index += 1
        else
          terminal_parse_failure('"')
          r1 = nil
        end
        s0 << r1
        if r1
          s2, i2 = [], index
          loop do
            i3, s3 = index, []
            i4 = index
            if input.index('"', index) == index
              r5 = instantiate_node(SyntaxNode,input, index...(index + 1))
              @index += 1
            else
              terminal_parse_failure('"')
              r5 = nil
            end
            if r5
              r4 = nil
            else
              self.index = i4
              r4 = instantiate_node(SyntaxNode,input, index...index)
            end
            s3 << r4
            if r4
              i6 = index
              if input.index("\\\\", index) == index
                r7 = instantiate_node(SyntaxNode,input, index...(index + 2))
                @index += 2
              else
                terminal_parse_failure("\\\\")
                r7 = nil
              end
              if r7
                r6 = r7
              else
                if input.index('\"', index) == index
                  r8 = instantiate_node(SyntaxNode,input, index...(index + 2))
                  @index += 2
                else
                  terminal_parse_failure('\"')
                  r8 = nil
                end
                if r8
                  r6 = r8
                else
                  if index < input_length
                    r9 = instantiate_node(SyntaxNode,input, index...(index + 1))
                    @index += 1
                  else
                    terminal_parse_failure("any character")
                    r9 = nil
                  end
                  if r9
                    r6 = r9
                  else
                    self.index = i6
                    r6 = nil
                  end
                end
              end
              s3 << r6
            end
            if s3.last
              r3 = instantiate_node(SyntaxNode,input, i3...index, s3)
              r3.extend(DoubleQuotedString0)
            else
              self.index = i3
              r3 = nil
            end
            if r3
              s2 << r3
            else
              break
            end
          end
          r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
          s0 << r2
          if r2
            if input.index('"', index) == index
              r10 = instantiate_node(SyntaxNode,input, index...(index + 1))
              @index += 1
            else
              terminal_parse_failure('"')
              r10 = nil
            end
            s0 << r10
          end
        end
        if s0.last
          r0 = instantiate_node(Terminal,input, i0...index, s0)
          r0.extend(DoubleQuotedString1)
        else
          self.index = i0
          r0 = nil
        end

        node_cache[:double_quoted_string][start_index] = r0

        return r0
      end