[swift-users] Will it be better if `fallthrough` works with `label` in nested `switch - case`?

[Saagar Jha]

This seems like a better solution to me. The other one smacks of goto.
On Fri, Oct 14, 2016 at 20:52 Zhao Xin via swift-users <
swift-users at swift.org> wrote:

> I manage to use below work around.
>
> let count = 1
>
>
> switch count {
>
> case 0, 1:
>
>     let buttonId = NSAlertThirdButtonReturn
>
>     let shouldFallthrough = { () -> Bool in
>
>         switch buttonId {
>
>         case NSAlertFirstButtonReturn:
>
>             print("do something")
>
>         case NSAlertSecondButtonReturn:
>
>             print("do something")
>
>         case NSAlertThirdButtonReturn:
>
>             print("do something")
>
>             return true
>
>         default:
>
>             fatalError()
>
>         }
>
>
>
>         return false
>
>     }()
>
>     if shouldFallthrough { fallthrough }
>
> default:
>
>     print("do extra things")
>
> }
>
> Zhaoxin
>
>
> On Sat, Oct 15, 2016 at 10:44 AM, Zhao Xin <owenzx at gmail.com> wrote:
>
> I thought below code would work. It didn't.
>
> let count = 1
>
>
> outerSwitch: switch count {
>
> case 0, 1:
>
>     let buttonId = 0
>
>     switch  buttonId {
>
>     case NSAlertFirstButtonReturn:
>
>         print("do something")
>
>     case NSAlertSecondButtonReturn:
>
>         print("do something")
>
>     case NSAlertThirdButtonReturn:
>
>         print("do something")
>
>         fallthrough outerSwitch // error here
>
>     default:
>
>         fatalError()
>
>     }
>
> default:
>
>     print("do extra things")
>
> }
>
> So I have to use `if - else if - else` instead. I think if `fallthrouh`
> works with `label`, the code will be more elegant.
>
> Zhaoxin
>
>
>
>
>
>
>
>
>
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