AliceFactory2.hx

class AliceFactory2 implements PersonInterface<Alice> {
	public function new() { }

	public function make() : AbsPerson<Alice> {
		return Alice.AliceConst;
	}
}

Test2.hx

class Test {
	static function test<T>(m : PersonInterface<T>) : T {
		return m.make();
	}

	static function main() {
		var x = test(new AliceFactory2());
		
		$type(x);
		trace(x);
	}
}