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<?php
/**
* Copyright © 2018 Thomas Klein, All rights reserved.
* See LICENSE bundled with this library for license details.
*/
declare(strict_types=1);
namespace LogicTree\Operator\Comparator;
* Class NullOperator
*
* The NULL:
* The output is "true" if $expression is null
final class NullOperator extends AbstractCompareOne
{
public const CODE = 'null';
* {@inheritdoc}
public function executeComparison($expression): bool
return $expression === null;
}