4 * This file is part of Psy Shell.
6 * (c) 2012-2017 Justin Hileman
8 * For the full copyright and license information, please view the LICENSE
9 * file that was distributed with this source code.
12 namespace Psy\CodeCleaner;
14 use PhpParser\Node as Node;
15 use PhpParser\Node\Expr\Assign;
16 use PhpParser\Node\Expr\Variable;
17 use Psy\Exception\FatalErrorException;
20 * Validate that the user input does not assign the `$this` variable.
22 * @author Martin HasoĊ <martin.hason@gmail.com>
24 class AssignThisVariablePass extends CodeCleanerPass
27 * Validate that the user input does not assign the `$this` variable.
29 * @throws RuntimeException if the user assign the `$this` variable
33 public function enterNode(Node $node)
35 if ($node instanceof Assign && $node->var instanceof Variable && $node->var->name === 'this') {
36 throw new FatalErrorException('Cannot re-assign $this');