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AbstractClassPass.php (2.33 KB)

AssignThisVariablePass.php (1.09 KB)

CallTimePassByReferencePass.php (1.57 KB)

CalledClassPass.php (2.69 KB)

CodeCleanerPass.php (415 B)

EmptyArrayDimFetchPass.php (1.99 KB)

ExitPass.php (859 B)

FinalClassPass.php (1.75 KB)

FunctionContextPass.php (1.52 KB)

ImplicitReturnPass.php (4.12 KB)

IssetPass.php (1.37 KB)

LabelContextPass.php (2.55 KB)

LeavePsyshAlonePass.php (992 B)

ListPass.php (2.81 KB)

LoopContextPass.php (3.95 KB)

MagicConstantsPass.php (1.04 KB)

NamespaceAwarePass.php (2.29 KB)

NamespacePass.php (2.78 KB)

NoReturnValue.php (828 B)

PassableByReferencePass.php (4.48 KB)

RequirePass.php (4.78 KB)

ReturnTypePass.php (3.63 KB)

StrictTypesPass.php (3.11 KB)

UseStatementPass.php (4.66 KB)

ValidClassNamePass.php (9.17 KB)

ValidConstructorPass.php (4.03 KB)

ValidFunctionNamePass.php (2.37 KB)

Edit: EmptyArrayDimFetchPass.php

<?php

/*
 * This file is part of Psy Shell.
 *
 * (c) 2012-2023 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\Assign;
use PhpParser\Node\Expr\AssignRef;
use PhpParser\Node\Stmt\Foreach_;
use Psy\Exception\FatalErrorException;

/**
 * Validate empty brackets are only used for assignment.
 */
class EmptyArrayDimFetchPass extends CodeCleanerPass
{
    const EXCEPTION_MESSAGE = 'Cannot use [] for reading';

private array $theseOnesAreFine = [];

/**
     * @return Node[]|null Array of nodes
     */
    public function beforeTraverse(array $nodes)
    {
        $this->theseOnesAreFine = [];
    }

/**
     * @throws FatalErrorException if the user used empty array dim fetch outside of assignment
     *
     * @param Node $node
     *
     * @return int|Node|null Replacement node (or special return value)
     */
    public function enterNode(Node $node)
    {
        if ($node instanceof Assign && $node->var instanceof ArrayDimFetch) {
            $this->theseOnesAreFine[] = $node->var;
        } elseif ($node instanceof AssignRef && $node->expr instanceof ArrayDimFetch) {
            $this->theseOnesAreFine[] = $node->expr;
        } elseif ($node instanceof Foreach_ && $node->valueVar instanceof ArrayDimFetch) {
            $this->theseOnesAreFine[] = $node->valueVar;
        } elseif ($node instanceof ArrayDimFetch && $node->var instanceof ArrayDimFetch) {
            // $a[]['b'] = 'c'
            if (\in_array($node, $this->theseOnesAreFine)) {
                $this->theseOnesAreFine[] = $node->var;
            }
        }

if ($node instanceof ArrayDimFetch && $node->dim === null) {
            if (!\in_array($node, $this->theseOnesAreFine)) {
                throw new FatalErrorException(self::EXCEPTION_MESSAGE, $node->getStartLine());
            }
        }
    }
}