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<?php declare(strict_types=1);
/*
* This file is part of the pinepain/js-sandbox PHP library.
*
* Copyright (c) 2016-2017 Bogdan Padalko <[email protected]>
* Licensed under the MIT license: http://opensource.org/licenses/MIT
* For the full copyright and license information, please view the
* LICENSE file that was distributed with this source or visit
* http://opensource.org/licenses/MIT
*/
namespace Pinepain\JsSandbox\Modules;
class ModulesStack implements ModulesStackInterface
{
private $stack = [];
/**
* {@inheritdoc}
public function push(ModuleInterface $module)
$this->stack[] = $module;
}
public function pop(): ModuleInterface
return array_pop($this->stack);
public function top(): ?ModuleInterface
return reset($this->stack) ?: null;
public function bottom(): ?ModuleInterface
return end($this->stack) ?: null;