typedef i27 {}
typedef i9 {}

typedef int_pair {
	i27 a;
	i27 b;

	sum(*int_pair self => i27)
	{
		return self*.a + self*.b;
	}
}

main()
{
	mut p = int_pair!{.a = 9, .b = 10};
	i27 s = p.sum();
}