Chris@13: <?php
Chris@13: 
Chris@13: /*
Chris@13:  * This file is part of Psy Shell.
Chris@13:  *
Chris@13:  * (c) 2012-2018 Justin Hileman
Chris@13:  *
Chris@13:  * For the full copyright and license information, please view the LICENSE
Chris@13:  * file that was distributed with this source code.
Chris@13:  */
Chris@13: 
Chris@13: namespace Psy\CodeCleaner;
Chris@13: 
Chris@13: use PhpParser\Node;
Chris@13: use PhpParser\Node\Expr\ConstFetch;
Chris@13: use PhpParser\Node\Expr\Instanceof_;
Chris@13: use PhpParser\Node\Scalar;
Chris@13: use PhpParser\Node\Scalar\Encapsed;
Chris@13: use Psy\Exception\FatalErrorException;
Chris@13: 
Chris@13: /**
Chris@13:  * Validate that the instanceof statement does not receive a scalar value or a non-class constant.
Chris@13:  *
Chris@13:  * @author Martin Hasoň <martin.hason@gmail.com>
Chris@13:  */
Chris@13: class InstanceOfPass extends CodeCleanerPass
Chris@13: {
Chris@13:     const EXCEPTION_MSG = 'instanceof expects an object instance, constant given';
Chris@13: 
Chris@13:     /**
Chris@13:      * Validate that the instanceof statement does not receive a scalar value or a non-class constant.
Chris@13:      *
Chris@13:      * @throws FatalErrorException if a scalar or a non-class constant is given
Chris@13:      *
Chris@13:      * @param Node $node
Chris@13:      */
Chris@13:     public function enterNode(Node $node)
Chris@13:     {
Chris@13:         if (!$node instanceof Instanceof_) {
Chris@13:             return;
Chris@13:         }
Chris@13: 
Chris@13:         if (($node->expr instanceof Scalar && !$node->expr instanceof Encapsed) || $node->expr instanceof ConstFetch) {
Chris@13:             throw new FatalErrorException(self::EXCEPTION_MSG, 0, E_ERROR, null, $node->getLine());
Chris@13:         }
Chris@13:     }
Chris@13: }