AbstractSet.php

<?php


/**
 * This file is part of the ramsey/collection 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\Collection;


/**
 * This class contains the basic implementation of a collection that does not
 * allow duplicated values (a set), to minimize the effort required to implement
 * this specific type of collection.
 *
 * @template T
 * @extends AbstractCollection<T>
 */
abstract class AbstractSet extends AbstractCollection {
    public function add(mixed $element) : bool {
        if ($this->contains($element)) {
            return false;
        }
        return parent::add($element);
    }
    public function offsetSet(mixed $offset, mixed $value) : void {
        if ($this->contains($value)) {
            return;
        }
        parent::offsetSet($offset, $value);
    }

}