> On Oct 24, 2017, at 5:02 PM, Slava Pestov via swift-evolution
> <swift-evolution@swift.org> wrote:
>
> Thoughts? Does anyone actually rely on this feature, instead of just
> stumbling on it by accident once in a while?
The main thing I can think of off the top of my head is getting the tag from
the sender in an IBAction:
@IBAction private func someAction(_ sender: Any?) {
guard let tag = (sender as AnyObject?)?.tag as Int? else { return }
...
}
Unfortunately given how many unrelated Cocoa objects there are that implement
-tag, it’s not really practical to implement this without the AnyObject
dispatch. If a TagContaining protocol could be introduced and all the objects
that implement -tag could be made to conform to it, then that would work around
the problem (I believe I pitched this at some point long ago, but without
catching any interest).
Charles
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