How to detect that parameter is a tuple of two arbitrary types?

Question

What I am actually doing is more complex but it comes down to being able to implement function to detect that something is a tuple, regardless of what the are the types of i

Answer 1

In Swift 3, it's now done this way:

func isTuple(value: Any) -> Bool {
    if let type = Mirror(reflecting: value).displayStyle, type == .tuple {
        return true
    }

    return false
}

isTuple(value: ()) // true
isTuple(value: (1, 2) // true
isTuple(value: 3) // false