# File lib/kramdown/parser/kramdown.rb, line 194
      def parse_spans(el, stop_re = nil, parsers = nil, text_type = @text_type)
        @stack.push([@tree, @text_type]) unless @tree.nil?
        @tree, @text_type = el, text_type

        span_start = @span_start
        span_start_re = @span_start_re
        span_start, span_start_re = span_parser_regexps(parsers) if parsers
        parsers = parsers || @span_parsers

        used_re = (stop_re.nil? ? span_start_re : /(?=#{Regexp.union(stop_re, span_start)})/)
        stop_re_found = false
        while !@src.eos? && !stop_re_found
          if result = @src.scan_until(used_re)
            add_text(result)
            if stop_re && (stop_re_matched = @src.check(stop_re))
              stop_re_found = (block_given? ? yield : true)
            end
            processed = parsers.any? do |name|
              if @src.check(@parsers[name].start_re)
                send(@parsers[name].method)
                true
              else
                false
              end
            end unless stop_re_found
            add_text(@src.getch) if !processed && !stop_re_found
          else
            (add_text(@src.rest); @src.terminate) unless stop_re
            break
          end
        end

        @tree, @text_type = @stack.pop

        stop_re_found
      end