Extend Array constrained when Element is a tuple

Question

Is there a way to extend an Array when the element is a type of tuple ?

public extension Array where Element: (timeZoneName: String, formattedName: String){

}

This declaration returns 4 errors:

• Statement cannot begin with a closure expression
• Braced block statements is an unused closure
• Expected '{' in extension
• Expected identifier for type name

I can't tell if the errors shown are accurate. Any ideas?

Answer 1

Swift 3 version of appzYourLife's answer:

extension Sequence where Iterator.Element == Tuple2 {
    func foo() {}
}

Answer 2

It's now possible in Swift 3.1.

extension Array where Element == (String, String) {
    ...
}