vendor/symfony/security-acl/Permission/AbstractMaskBuilder.php

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<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\Security\Acl\Permission;

/**
 * This abstract class implements nearly all the MaskBuilderInterface methods.
 */
abstract class AbstractMaskBuilder implements MaskBuilderInterface
{
    /**
     * @var int
     */
    protected $mask;

    /**
     * Constructor.
     *
     * @param int $mask optional; defaults to 0
     */
    public function __construct($mask = 0)
    {
        $this->set($mask);
    }

    /**
     * {@inheritdoc}
     */
    public function set($mask)
    {
        if (!is_int($mask)) {
            throw new \InvalidArgumentException('$mask must be an integer.');
        }

        $this->mask = $mask;

        return $this;
    }

    /**
     * {@inheritdoc}
     */
    public function get()
    {
        return $this->mask;
    }

    /**
     * {@inheritdoc}
     */
    public function add($mask)
    {