gistfile1.swift

import UIKit

protocol myProtocol: class {
    func dothatthing () -> Void
}

var array : [protocol<myProtocol>] = []

class A : myProtocol {
    func dothatthing() {
        println("Class A")
    }
}

let foo = A()
let bar = A()
array.append(foo)
array.append(bar)

for x in array {
    if x === bar {
        println("We got it!")
    }
    else {
        println("We have not it")
    }
}