AnyObject

Using Swift
9

Thanks a lot @AlexanderM, @cukr and @anon9791410

Just my observation, it doesn't tell why it is happening but looks like all free bridging will satisfy is clause

struct S {}
let s1 = S()
print(s1 is AnyObject) //compiler: 'is' test is always true

import Foundation
let str : String = ""
print(str is NSString) //compiler: 'is' test is always true

Question:

So is there a way to be sure only class instances can be passed to a function (Example below)?

func f1(anyObject: AnyObject) {} //Is there any way to restrict the parameter to only class instances?

let a : AnyObject = S() as AnyObject //S is a struct

f1(anyObject: a) //valid