Parentheses for complex new/instanceof expressions
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<?php
new ('a' . 'b');
new (x);
new (foo());
new ('foo');
new (x[0]);
new (x->y);
new ((x)::$y);
$x instanceof ('a' . 'b');
$x instanceof ($y++);
-----
new ('a' . 'b')();
new (x)();
new (foo())();
new ('foo')();
new (x[0])();
new (x->y)();
new ((x)::$y)();
$x instanceof ('a' . 'b');
$x instanceof ($y++);