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Revision Autor Zeilennr. Zeile
148 lars 1 
<?php
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/*
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 * This file is part of Psy Shell.
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 *
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 * (c) 2012-2023 Justin Hileman
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 *
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 * For the full copyright and license information, please view the LICENSE
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 * file that was distributed with this source code.
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 */
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namespace Psy\CodeCleaner;
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use PhpParser\Node;
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use PhpParser\Node\Expr\Assign;
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use PhpParser\Node\Expr\Variable;
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use Psy\Exception\FatalErrorException;
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/**
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 * Validate that the user input does not assign the `$this` variable.
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 *
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 * @author Martin Hasoň <martin.hason@gmail.com>
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 */
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class AssignThisVariablePass extends CodeCleanerPass
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{
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    /**
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     * Validate that the user input does not assign the `$this` variable.
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     *
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     * @throws FatalErrorException if the user assign the `$this` variable
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     *
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     * @param Node $node
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     *
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     * @return int|Node|null Replacement node (or special return value)
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     */
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    public function enterNode(Node $node)
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    {
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        if ($node instanceof Assign && $node->var instanceof Variable && $node->var->name === 'this') {
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            throw new FatalErrorException('Cannot re-assign $this', 0, \E_ERROR, null, $node->getLine());
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        }
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    }
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}