Swift - Coffescript "?" equivalent

CustomOperatorNilCheck.swift

import Cocoa

/*
CoffeeScript funfact: I have 2 values ​`a`​ and ​`b`​, and wanted a 3rd value ​`x`​ that is equal to ​`a`​ if it exists, otherwise is ​`b`​ if it exists, or is ​`undefined`​ if both are
sami [18:27]
I was able to do that with just ​`x = a ? b`
*/

infix operator ?| {}
func ?| <T>(left: T?, right: T?) -> T? {
	if (left != nil) {
		return left
	}
	return right // Either returns right or nil
}

class Car:NSObject {
	internal override var description:String { return "Car"}
}
class Bike:NSObject {
	internal override var description:String { return "Bike"}
}
class Skateboard:NSObject {
	internal override var description:String { return "Skateboard"}
}

let carThatIMayOwn:Car? = nil
let bikethatIMayOwn:Bike? = Bike() // Oh, I have a bike instance!
let skateboardIMayOwn:Skateboard? = Skateboard() // Also have a skateboard

println("Today I will take my \(carThatIMayOwn ?| bikethatIMayOwn ?| skateboardIMayOwn)")

// Prints "Today I will take my Optional(Bike)"

This produced the same result, but maybe I'm missing something?

let carThatIMayOwn:Car? = nil
let bikethatIMayOwn:Bike? = Bike() // Oh, I have a bike instance!
let skateboardIMayOwn:Skateboard? = Skateboard() // Also have a skateboard

print("Today I will take my \(carThatIMayOwn ?? bikethatIMayOwn ?? skateboardIMayOwn)")