class Kramdown::Parser::Kramdown

def parse_codespan
  start_line_number = @src.current_line_number
  result = @src.scan(CODESPAN_DELIMITER)
  simple = (result.length == 1)
  saved_pos = @src.save_pos
  if simple && @src.pre_match =~ /\s\Z|\A\Z/ && @src.match?(/\s/)
    add_text(result)
    return
  end
  # assign static regex to avoid allocating the same on every instance
  # where +result+ equals a single-backtick. Interpolate otherwise.
  if result == '`'
    scan_pattern = /`/
    str_sub_pattern = /`\Z/
  else
    scan_pattern = /#{result}/
    str_sub_pattern = /#{result}\Z/
  end
  if (text = @src.scan_until(scan_pattern))
    text.sub!(str_sub_pattern, '')
    unless simple
      text = text[1..-1] if text[0..0] == ' '
      text = text[0..-2] if text[-1..-1] == ' '
    end
    @tree.children << Element.new(:codespan, text, nil, {
                                    codespan_delimiter: result,
                                    location: start_line_number
                                  })
  else
    @src.revert_pos(saved_pos)
    add_text(result)
  end
end