Extending typed Arrays (of primitive types like Bool) in Swift 3?

Question

Previously in Swift 2.2 I\'m able to do:

extension _ArrayType where Generator.Element == Bool{
    var allTrue : Bool{
        return !self.contains(false)
    }         


        

Answer 1

Extending _ArrayProtocol or Collection didn't work for me but Sequence did.

public extension Sequence where Iterator.Element == String
{
    var allTrue: Bool { return !contains(false)
}