> On Mar 18, 2016, at 1:18 PM, Pushkar N Kulkarni via swift-corelibs-dev
> <swift-corelibs-dev@swift.org> wrote:
>
> I am trying to implement some of the methods and properties in NSOrderedSet.
>
> The read-only property "reversedOrderedSet" has the @NSCopying attribute
> according to the NSOrderedSet class reference.
>
> So, I tried to do this:
> @NSCopying public var reversedOrderedSet: NSOrderedSet {
>
> return NSOrderedSet.init(array: _orderedStorage.reverse())
>
> }
>
>
>
swift-corelibs-foundation can’t really implement that in terms of adopting the
decorator of @NSCopying because it does not have objc backing.
> The compiler says "@NSCopying requires the property to be mutable". When
> inherited by NSMutableOrderedSet, doesn't this property qualify to be
> mutable?
>
>
>
The mutable state here is a setter not a NSMutableOrderedSet
> Does @NSCopying not apply here? Is my understanding of "mutable (stored)
> property" flawed? Or is there a problem with the implementation?
>
>
>
just comment it out and you will be good to go likely.
> Nowhere in Foundation is @NSCopying being used currently. So don't have a
> "reference implementation" :)
>
>
>
>
>
> Pushkar N Kulkarni,
> IBM Runtimes
>
> Simplicity is prerequisite for reliability - Edsger W. Dijkstra
>
>
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