Description:
------------
Operator `new' accepts either class name as either symbol token or variable
containing class name (T_STRING or
T_VARIABLE), but does not allow expressions returning class name.

Test script:
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/* first form, works */
$handler = new SomeClass($constructorParam);

/* second form, works */
$handlerClass = handlerFor($something); /* returns name of some class to be instantiated */
$handler = new $handlerClass($constructorParam);

/* third form -- does not work */
$handler = new (handlerFor($something))($constructorParam);

Expected result:
----------------
The third form ought to work just like the other two, so one doesn't need to
create extra variable for single use.

Actual result:
--------------
PHP Parse error:  syntax error, unexpected '(', expecting T_STRING or T_VARIABLE
or '$'