protected function lib_e()
{
$arg = func_get_arg(0);
switch ($arg[0]) {
case "list":
$items = $arg[2];
if (isset($items[0])) {
return $this->lib_unquote($items[0]);
}
return self::$defaultValue;
case "string":
$arg[1] = "";
return $arg;
case "keyword":
return $arg;
default:
return array("keyword", $this->compileValue($arg));
}
}