On Fri, May 5, 2017 at 1:47 AM, Xiaodi Wu via swift-evolution <
swift-evolution@swift.org> wrote:
> On Fri, May 5, 2017 at 12:41 AM, Brent Royal-Gordon <
> br...@architechies.com> wrote:
>
>> I would think only final classes could participate in this, since a
>> subclassable class would need to allow subclasses to override equality, and
>> you can't override a static `==` operator method.
>>
>
> I work so rarely with classes that I'm embarrassed to have to ask this
> question: can classes not satisfy Equatable with a `public class func ==`?
>
Currently:
class C: Equatable {
class func == (lhs: C, rhs: C) -> Bool {
return lhs === rhs
}
}
Yields an error, “Operator '==' declared in non-final class 'C' must be
'final'”.
Nevin
_______________________________________________
swift-evolution mailing list
swift-evolution@swift.org
https://lists.swift.org/mailman/listinfo/swift-evolution
