Description:
------------
The PHP parser currently cannot handle "__CLASS__" directly after "instanceof". I think this should be possible.

Reproduce code:
---------------
class myclass {
    function mymethod($otherObject) {
        if ($otherObject instanceof __CLASS__) {
            $otherObject->mymethod(null);
        }
        return 'works!';
    }
}

$a = new myclass();
print $a->mymethod($a);

Expected result:
----------------
works!

Actual result:
--------------
Parse error: syntax error, unexpected T_CLASS_C, expecting T_STRING or T_VARIABLE or '$' in ... on line 4