Subversion-Projekte lars-tiefland.laravel_shop

<?php

/*

 * This file is part of Psy Shell.

 *

 * (c) 2012-2022 Justin Hileman

 *

 * For the full copyright and license information, please view the LICENSE

 * file that was distributed with this source code.

 */

namespace Psy\CodeCleaner;

use PhpParser\Node;

use PhpParser\Node\Expr\ArrayDimFetch;

use PhpParser\Node\Expr\Isset_;

use PhpParser\Node\Expr\NullsafePropertyFetch;

use PhpParser\Node\Expr\PropertyFetch;

use PhpParser\Node\Expr\Variable;

use Psy\Exception\FatalErrorException;

/**

 * Code cleaner pass to ensure we only allow variables, array fetch and property

 * fetch expressions in isset() calls.

 */

class IssetPass extends CodeCleanerPass

{

    const EXCEPTION_MSG = 'Cannot use isset() on the result of an expression (you can use "null !== expression" instead)';

    /**

     * @throws FatalErrorException

     *

     * @param Node $node

     *

     * @return int|Node|null Replacement node (or special return value)

     */

    public function enterNode(Node $node)

    {

        if (!$node instanceof Isset_) {

            return;

        }

        foreach ($node->vars as $var) {

            if (!$var instanceof Variable && !$var instanceof ArrayDimFetch && !$var instanceof PropertyFetch && !$var instanceof NullsafePropertyFetch) {

                throw new FatalErrorException(self::EXCEPTION_MSG, 0, \E_ERROR, null, $node->getLine());

            }

        }

    }

}