/**
* Registers the Twig autoloader after first ensuring that Twig_Autoloader
* is a valid class, which it should be assuming the Twig package has been
* installed into classes/Twig. If this is not true, a
* BadMethodCallException is thrown.
*/
private static function _registerTwigAutoloader()
{
if (self::$_registeredTwigAutoloader) {
return;
}
if (!class_exists('Twig_Autoloader')) {
throw new BadMethodCallException('The Twig_Autoloader class does not exist.');
}
Twig_Autoloader::register();
self::$_registeredTwigAutoloader = true;
}
