/** * Accept method of the visitor design pattern. This method will be called * by a visitor during tree traversal. * * @param PHP_Depend_Code_ASTVisitorI $visitor The calling visitor instance. * @param mixed $data Optional previous calculated data. * * @return mixed * @since 0.9.12 */ public function accept(PHP_Depend_Code_ASTVisitorI $visitor, $data = null) { return $visitor->visitUnaryExpression($this, $data); }