Custom Ternary Shorthand

gistfile1.swift

import Cocoa

operator infix ~~ {}

@infix func ~~ (left: Any?, right: Any?) -> Any? {
    if let temp = left {
        return temp
    }

    if let temp = right {
        return temp
    }
    
    return nil
}


let isSet:NSString? = "I'm isSet"
let notSet:NSString?

let test1 = notSet ~~ isSet

let test2 = isSet ~~ notSet

Output of both test1 and test2 will be a nillable version of isSet

Could also do:

@infix func ~~ (left: Any?, right: Any?) -> Any {
    if let temp = left {
        return temp
    }

    assert(right)

    return right!
}

Which will give you a non-nillable, but will fail the assert if you ever pass a nil value to the right hand.