70 lines
2.1 KiB
PHP
70 lines
2.1 KiB
PHP
<?php
|
|
|
|
/**
|
|
* Useful PHP Basics
|
|
* Copyright (C) 2023 Sebastian Meyer <sebastian.meyer@opencultureconsulting.com>
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
declare(strict_types=1);
|
|
|
|
namespace OCC\Basics\DataStructures;
|
|
|
|
use RuntimeException;
|
|
|
|
/**
|
|
* A type-sensitive, taversable First In, First Out Queue (FIFO).
|
|
*
|
|
* @author Sebastian Meyer <sebastian.meyer@opencultureconsulting.com>
|
|
* @package opencultureconsulting/basics
|
|
*
|
|
* @implements \ArrayAccess
|
|
* @implements \Countable
|
|
* @implements \Iterator
|
|
* @implements \Serializable
|
|
*/
|
|
class StrictQueue extends StrictList
|
|
{
|
|
/**
|
|
* Set the mode of iteration.
|
|
* @see SplDoublyLinkedList::setIteratorMode()
|
|
*
|
|
* @param int $mode The new iterator mode (0 or 1)
|
|
*
|
|
* @return int The set of flags and modes of iteration
|
|
*
|
|
* @throws \RuntimeException
|
|
*/
|
|
final public function setIteratorMode(int $mode): int
|
|
{
|
|
if ($mode > 1) {
|
|
throw new RuntimeException('Changing the iterator direction of ' . static::class . ' is prohibited.');
|
|
}
|
|
return parent::setIteratorMode($mode);
|
|
}
|
|
|
|
/**
|
|
* Create a type-sensitive, traversable queue of items.
|
|
*
|
|
* @param iterable $items Initial set of items
|
|
* @param string[] $allowedTypes Allowed types of items (optional)
|
|
*/
|
|
public function __construct(iterable $items = [], array $allowedTypes = [])
|
|
{
|
|
parent::__construct($items, $allowedTypes);
|
|
$this->setIteratorMode(0);
|
|
}
|
|
}
|