Xcode 8 :function types cannot have argument label breaking my build

Question

It seems that for some reason Swift have chosen to make coding in it less readable by forcing users to remove completion handler parameter labels. I have read the Swift dis

Answer 1

A workaround to consider. You can't do:

func doStuff(completion: (foo: Int, bar: String) -> Void) {
    ...
    completion(foo: 0, bar: "")
}

... but you can do:

func doStuff(completion: ((foo: Int, bar: String)) -> Void) {
    ...
    completion((foo: 0, bar: ""))
}

i.e. have a single unnamed argument to your closure which is a tuple, in this case (foo: Int, bar: String).

It's ugly in its own way, but at least you retain the argument labels.