code: private function _call() : bool {
          if (!isset($this->_pCall)) {
              Console::warning('Failed to call. Invalid pointer.');
              return false;
          }
          $g_count = count($this->_generators);
          foreach ($this->_generators as $key => $generator)
              $generator->send($key + 1 == $g_count);
          $ret = $this->_routerCall();
          while ($generator = array_pop($this->_generators))
              $generator->next();
          $this->_generators = [];
          return $ret;
      }
docs: 路由事件处理，包括中间件和路由回调
  
  @return bool