Method mixedGuard

examples/demo.php:374–383

Positive instanceof + early return on a mixed parameter. */

(mixed $value)

    /** Positive instanceof + early return on a mixed parameter. */
    public function mixedGuard(mixed $value): void
    {
        if ($value instanceof Banana) {
            return;                               // $value is Banana → exit
        }
        // After the guard, $value is NOT Banana.
        if ($value instanceof Rock) {
            $value->crush();                      // narrowed to Rock (not Banana)
        }
    }
}