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home/autoovt/www/vendor-old/psy/psysh/src/CodeCleaner/FunctionReturnInWriteContextPass.php 0000666 00000005276 14772316237 0026234 0 ustar 00 <?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\Array_; use PhpParser\Node\Expr\Assign; use PhpParser\Node\Expr\FuncCall; use PhpParser\Node\Expr\Isset_; use PhpParser\Node\Expr\MethodCall; use PhpParser\Node\Expr\StaticCall; use PhpParser\Node\Stmt\Unset_; use PhpParser\Node\VariadicPlaceholder; use Psy\Exception\FatalErrorException; /** * Validate that the functions are used correctly. * * @author Martin Hasoň <martin.hason@gmail.com> */ class FunctionReturnInWriteContextPass extends CodeCleanerPass { const ISSET_MESSAGE = 'Cannot use isset() on the result of an expression (you can use "null !== expression" instead)'; const EXCEPTION_MESSAGE = "Can't use function return value in write context"; /** * Validate that the functions are used correctly. * * @throws FatalErrorException if a function is passed as an argument reference * @throws FatalErrorException if a function is used as an argument in the isset * @throws FatalErrorException if a value is assigned to a function * * @param Node $node * * @return int|Node|null Replacement node (or special return value) */ public function enterNode(Node $node) { if ($node instanceof Array_ || $this->isCallNode($node)) { $items = $node instanceof Array_ ? $node->items : $node->args; foreach ($items as $item) { if ($item instanceof VariadicPlaceholder) { continue; } if ($item && $item->byRef && $this->isCallNode($item->value)) { throw new FatalErrorException(self::EXCEPTION_MESSAGE, 0, \E_ERROR, null, $node->getStartLine()); } } } elseif ($node instanceof Isset_ || $node instanceof Unset_) { foreach ($node->vars as $var) { if (!$this->isCallNode($var)) { continue; } $msg = $node instanceof Isset_ ? self::ISSET_MESSAGE : self::EXCEPTION_MESSAGE; throw new FatalErrorException($msg, 0, \E_ERROR, null, $node->getStartLine()); } } elseif ($node instanceof Assign && $this->isCallNode($node->var)) { throw new FatalErrorException(self::EXCEPTION_MESSAGE, 0, \E_ERROR, null, $node->getStartLine()); } } private function isCallNode(Node $node): bool { return $node instanceof FuncCall || $node instanceof MethodCall || $node instanceof StaticCall; } }
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