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Direktori : /home/q/g/b/qgbqkvz/www/wp-content/plugins/wp-scss/scssphp/src/Value/ |
Current File : /home/q/g/b/qgbqkvz/www/wp-content/plugins/wp-scss/scssphp/src/Value/SassNull.php |
<?php /** * SCSSPHP * * @copyright 2012-2020 Leaf Corcoran * * @license http://opensource.org/licenses/MIT MIT * * @link http://scssphp.github.io/scssphp */ namespace ScssPhp\ScssPhp\Value; use ScssPhp\ScssPhp\Visitor\ValueVisitor; /** * The SassScript `null` value. */ final class SassNull extends Value { /** * @var SassNull|null */ private static $instance; public static function create(): SassNull { if (self::$instance === null) { self::$instance = new self(); } return self::$instance; } private function __construct() { } public function isTruthy(): bool { return false; } public function isBlank(): bool { return true; } public function accept(ValueVisitor $visitor) { return $visitor->visitNull(); } public function equals(object $other): bool { return $other instanceof SassNull; } public function unaryNot(): Value { return SassBoolean::create(true); } }