[swift-users] Identity based object hash?

[Travis Griggs via swift-users]

I have a class that I’d rather not have based off of NSObject, but I do want to 
have identity based equality. I’ve done that as follows:

class Foobar { }

extension Foobar:Equatable { }

func == (a:Foobar, b:Foobar) -> Bool {
        return a === b
}

What’s less clear to me is how to go about implementing an identity based hash

extension Foobar:Hashable {
        var hashValue:Int {
                // what magic should happen here?
        }
}
_______________________________________________
swift-users mailing list
swift-users@swift.org
https://lists.swift.org/mailman/listinfo/swift-users