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<?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;
use Ramsey\Collection\Exception\InvalidArgumentException;
/**
* 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.
*/
abstract class AbstractSet extends AbstractCollection
{
/**
* Adds the specified element to this set, if it is not already present.
*
* @param mixed $element The element to add to the set.
*
* @return bool `true` if this set did not already contain the specified
* element.
*
* @throws InvalidArgumentException when the element does not match the
* specified type for this set.
*/
public function add($element): bool
{
if ($this->contains($element)) {
return false;
}
return parent::add($element);
}
/**
* Sets the given value to the given offset in this set, if it is not
* already present.
*
* @param mixed|null $offset The offset is ignored and is treated as `null`.
* @param mixed $value The value to set at the given offset.
*
* @throws InvalidArgumentException when the value does not match the
* specified type for this set.
*/
public function offsetSet($offset, $value): void
{
if ($this->contains($value)) {
return;
}
parent::offsetSet($offset, $value);
}
}
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