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* * For the full copyright and license information, please view the LICENSE file * that was distributed with this source code. */ declare(strict_types=1); namespace Respect\Validation\Rules; /** * Validates if the input is a Roman numeral. * * @author Alexander Wühr
* @author Henrique Moody
* @author Jean Pimentel
*/ final class Roman extends AbstractEnvelope { public function __construct() { parent::__construct(new Regex('/^(?=[MDCLXVI])M*(C[MD]|D?C{0,3})(X[CL]|L?X{0,3})(I[XV]|V?I{0,3})$/')); } }