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<?php /* * This file is part of Psy Shell. * * (c) 2012-2015 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\ConstFetch; use PhpParser\Node\Expr\FuncCall; use PhpParser\Node\Name; use PhpParser\Node\Stmt\Class_ as ClassStmt; use PhpParser\Node\Stmt\Trait_ as TraitStmt; use Psy\Exception\ErrorException; /** * The called class pass throws warnings for get_class() and get_called_class() * outside a class context. */ class CalledClassPass extends CodeCleanerPass { private $inClass; /** * @param array $nodes */ public function beforeTraverse(array $nodes) { $this->inClass = false; } /** * @throws ErrorException if get_class or get_called_class is called without an object from outside a class * * @param Node $node */ public function enterNode(Node $node) { if ($node instanceof ClassStmt || $node instanceof TraitStmt) { $this->inClass = true; } elseif ($node instanceof FuncCall && !$this->inClass) { // We'll give any args at all (besides null) a pass. // Technically we should be checking whether the args are objects, but this will do for now. // // TODO: switch this to actually validate args when we get context-aware code cleaner passes. if (!empty($node->args) && !$this->isNull($node->args[0])) { return; } // We'll ignore name expressions as well (things like `$foo()`) if (!($node->name instanceof Name)) { return; } $name = strtolower($node->name); if (in_array($name, array('get_class', 'get_called_class'))) { $msg = sprintf('%s() called without object from outside a class', $name); throw new ErrorException($msg, 0, E_USER_WARNING, null, $node->getLine()); } } } /** * @param Node $node */ public function leaveNode(Node $node) { if ($node instanceof ClassStmt) { $this->inClass = false; } } private function isNull(Node $node) { return $node->value instanceof ConstFetch && strtolower($node->value->name) === 'null'; } }