# File lib/bson/bson_ruby.rb, line 344
    def deserialize_regex_data(buf)
      str = deserialize_cstr(buf)
      options_str = deserialize_cstr(buf)
      opts = 0
      opts |= Regexp::IGNORECASE if options_str.include?('i')
      opts |= Regexp::MULTILINE if options_str.include?('m')
      opts |= Regexp::MULTILINE if options_str.include?('s')
      opts |= Regexp::EXTENDED if options_str.include?('x')
      Regexp.new(str, opts)
    end