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<?php
/**
* This file is part of the ramsey/uuid library
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*
* @copyright Copyright (c) Ben Ramsey <ben@benramsey.com>
* @license http://opensource.org/licenses/MIT MIT
*/
declare(strict_types=1);
namespace Ramsey\Uuid\Rfc4122;
/**
* Provides common functionality for nil UUIDs
*
* The nil UUID is special form of UUID that is specified to have all 128 bits
* set to zero.
*
* @link https://tools.ietf.org/html/rfc4122#section-4.1.7 RFC 4122, § 4.1.7: Nil UUID
*
* @psalm-immutable
*/
trait NilTrait
{
/**
* Returns the bytes that comprise the fields
*/
abstract public function getBytes(): string;
/**
* Returns true if the byte string represents a nil UUID
*/
public function isNil(): bool
{
return $this->getBytes() === "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0";
}
}
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