struct Hoge { var foo: Int = 0 var bar: Int = 0 } var hoge: Hoge = Hoge() { didSet { print("didSet") } }
hoge.foo = 12 hoge.bar = 13
_ = { $0.foo = 12 $0.bar = 13 }(&hoge)
(hoge.foo, hoge.bar) = (12, 13)
