What is (()?) And ()? means fast?

Question

var aa: (()?) = (john.residence?.address = someAddress)
var bb: ()? = john.residence?.printNumberOfRooms()

Does it only share zero?

+3

jjaeko 26 Aug 14 at 14:17

1 answer

Mike pollard · Accepted Answer · 2014-08-26T14:39:02+0000

()

- an empty tuple type (same as Void

).

()?

is a complementary version of this.

(()?)

is a set containing a type ()?

, so it boils down to just()?