Given optionals and closures, is it necessary to support optional protocols?
protocol MyProtocol {
var titleForRow:((_ indexPath:IndexPath)->(String))? { get }
}
One disadvantage is that you need Obj-C, which means it doesn’t run on linux,
or several other platforms.
Another disadvantage, as I understand it, is it requires slower Obj-c dispatch,
instead of witness tables. Obj-C dispatch also only considers names, not
argument & return types.
> On Nov 14, 2016, at 5:48 PM, Rick Mann via swift-evolution
> <[email protected]> wrote:
>
> Will Swift ever support optional methods without @objc?
>
> What are the disadvantages of marking a protocol @objc?
>
> Thanks!
>
> --
> Rick Mann
> [email protected]
>
>
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