class E {}

/**
 * @template T of E
 */
class R {
	/** @var T */
	public $e;
	
	/** @return T */
	function ret() { return $this->e; } // nonsense, to silence missing return
	
	function test(): void {
		$this->e = static::ret(); // not ok
		$this->e = self::ret(); // not ok
		$this->e = $this->ret(); // ok
	}
}