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File Content: `ValidFunctionNamePass.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\Stmt\Do_;
use PhpParser\Node\Stmt\Function_;
use PhpParser\Node\Stmt\If_;
use PhpParser\Node\Stmt\Switch_;
use PhpParser\Node\Stmt\While_;
use Psy\Exception\FatalErrorException;

/**
 * Validate that function calls will succeed.
 *
 * This pass throws a FatalErrorException rather than letting PHP run
 * headfirst into a real fatal error and die.
 */
class ValidFunctionNamePass extends NamespaceAwarePass
{
    private $conditionalScopes = 0;

    /**
     * Store newly defined function names on the way in, to allow recursion.
     *
     * @throws FatalErrorException if a function is redefined in a non-conditional scope
     *
     * @param Node $node
     *
     * @return int|Node|null Replacement node (or special return value)
     */
    public function enterNode(Node $node)
    {
        parent::enterNode($node);

        if (self::isConditional($node)) {
            $this->conditionalScopes++;
        } elseif ($node instanceof Function_) {
            $name = $this->getFullyQualifiedName($node->name);

            // @todo add an "else" here which adds a runtime check for instances where we can't tell
            // whether a function is being redefined by static analysis alone.
            if ($this->conditionalScopes === 0) {
                if (\function_exists($name) ||
                    isset($this->currentScope[\strtolower($name)])) {
                    $msg = \sprintf('Cannot redeclare %s()', $name);
                    throw new FatalErrorException($msg, 0, \E_ERROR, null, $node->getStartLine());
                }
            }

            $this->currentScope[\strtolower($name)] = true;
        }
    }

    /**
     * @param Node $node
     *
     * @return int|Node|Node[]|null Replacement node (or special return value)
     */
    public function leaveNode(Node $node)
    {
        if (self::isConditional($node)) {
            $this->conditionalScopes--;
        }
    }

    private static function isConditional(Node $node)
    {
        return $node instanceof If_ ||
            $node instanceof While_ ||
            $node instanceof Do_ ||
            $node instanceof Switch_;
    }
}

Name	Size	Permission
AbstractClassPass.php	2377 bytes	0775
AssignThisVariablePass.php	1119 bytes	0775
CallTimePassByReferencePass.php	1612 bytes	0775
CalledClassPass.php	2741 bytes	0775
CodeCleanerPass.php	415 bytes	0775
EmptyArrayDimFetchPass.php	2030 bytes	0775
ExitPass.php	859 bytes	0775
FinalClassPass.php	1786 bytes	0775
FunctionContextPass.php	1568 bytes	0775
FunctionReturnInWriteContextPass.php	2750 bytes	0775
ImplicitReturnPass.php	4219 bytes	0775
IssetPass.php	1406 bytes	0775
LabelContextPass.php	2648 bytes	0775
LeavePsyshAlonePass.php	992 bytes	0775
ListPass.php	2712 bytes	0775
LoopContextPass.php	3714 bytes	0775
MagicConstantsPass.php	1068 bytes	0775
NamespaceAwarePass.php	2318 bytes	0775
NamespacePass.php	2821 bytes	0775
NoReturnValue.php	828 bytes	0775
PassableByReferencePass.php	4212 bytes	0775
RequirePass.php	4666 bytes	0775
ReturnTypePass.php	3484 bytes	0775
StrictTypesPass.php	2565 bytes	0775
UseStatementPass.php	4564 bytes	0775
ValidClassNamePass.php	9384 bytes	0775
ValidConstructorPass.php	4096 bytes	0775
ValidFunctionNamePass.php	2424 bytes	0775

Command Bosku:

File Content: ValidFunctionNamePass.php

File Content: `ValidFunctionNamePass.php`