home/alospiesjs/www/apis/youtube/vendor/psy/psysh/src/CodeCleaner/ListPass.php000060400000006331151163373130023612 0ustar00atLeastPhp71 = \version_compare(\PHP_VERSION, '7.1', '>='); } /** * Validate use of list assignment. * * @throws ParseErrorException if the user used empty with anything but a variable * * @param Node $node */ public function enterNode(Node $node) { if (!$node instanceof Assign) { return; } if (!$node->var instanceof Array_ && !$node->var instanceof List_) { return; } if (!$this->atLeastPhp71 && $node->var instanceof Array_) { $msg = "syntax error, unexpected '='"; throw new ParseErrorException($msg, $node->expr->getLine()); } // Polyfill for PHP-Parser 2.x $items = isset($node->var->items) ? $node->var->items : $node->var->vars; if ($items === [] || $items === [null]) { throw new ParseErrorException('Cannot use empty list', $node->var->getLine()); } $itemFound = false; foreach ($items as $item) { if ($item === null) { continue; } $itemFound = true; // List_->$vars in PHP-Parser 2.x is Variable instead of ArrayItem. if (!$this->atLeastPhp71 && $item instanceof ArrayItem && $item->key !== null) { $msg = 'Syntax error, unexpected T_CONSTANT_ENCAPSED_STRING, expecting \',\' or \')\''; throw new ParseErrorException($msg, $item->key->getLine()); } if (!self::isValidArrayItem($item)) { $msg = 'Assignments can only happen to writable values'; throw new ParseErrorException($msg, $item->getLine()); } } if (!$itemFound) { throw new ParseErrorException('Cannot use empty list'); } } /** * Validate whether a given item in an array is valid for short assignment. * * @param Expr $item * * @return bool */ private static function isValidArrayItem(Expr $item): bool { $value = ($item instanceof ArrayItem) ? $item->value : $item; while ($value instanceof ArrayDimFetch || $value instanceof PropertyFetch) { $value = $value->var; } // We just kind of give up if it's a method call. We can't tell if it's // valid via static analysis. return $value instanceof Variable || $value instanceof MethodCall || $value instanceof FuncCall; } }