> On Mar 13, 2017, at 5:13 AM, Kim Burgestrand via swift-users
> <[email protected]> wrote:
>
> Here are two implementations that I'd expect to be equivalent, but
> something's different because the first example crashes, whereas the second
> example does not crash.
>
> What's the difference between these two? Why does casting to Any before the
> forced downcast to T have any effect?
It shouldn't. Please file a bug, if you haven't already.
-Joe
> Example 1: (`unexpectedly found nil while unwrapping an Optional value`)
> ```
> func cast<T>(_ name: String?) -> T {
> return name as! T
> }
>
> debugPrint((cast(nil) as String?) as Any))
> ```
>
> Example 2: (prints `nil`)
> ```
> func cast<T>(_ name: String?) -> T {
> return (name as Any) as! T
> }
>
>
> debugPrint((cast(nil) as String?) as Any)
> ```
> _______________________________________________
> swift-users mailing list
> [email protected]
> https://lists.swift.org/mailman/listinfo/swift-users
_______________________________________________
swift-users mailing list
[email protected]
https://lists.swift.org/mailman/listinfo/swift-users
