CONST ENCODE_BASE_64        = 1;

        CONST UUID_CLEAR_VER        = 15;
        CONST UUID_VERSION_4        = 64;
        CONST UUID_CLEAR_VAR        = 63;
        CONST UUID_VAR_RFC      = 128;

        static function uuid(array $__options = [])
        {
            $__options +=
            [
                'delimiter'     => self::MINUS,
                'before'    => self::DEVOID,
                'after'     => self::DEVOID
            ];

            $uuid       = static::random(0x10);

            $uuid[0x06] = chr(ord($uuid[0x06]) & static::UUID_CLEAR_VER | static::UUID_VERSION_4);
            $uuid[0x08] = chr(ord($uuid[0x08]) & static::UUID_CLEAR_VAR | static::UUID_VAR_RFC);

            return static::insert('{:before}{:value}{:after}', ['value' => static::join([
                bin2hex(static::sub($uuid, 0x00, 0x04)),
                bin2hex(static::sub($uuid, 0x04, 0x02)),
                bin2hex(static::sub($uuid, 0x06, 0x02)),
                bin2hex(static::sub($uuid, 0x08, 0x02)),
                bin2hex(static::sub($uuid, 0x0A, 0x06))], $__options['delimiter'])] + $__options);
        }