Case .none:
Case .some("string"):
> On Jun 28, 2016, at 06:40, Lucas Jordan via swift-evolution
> <swift-evolution@swift.org> wrote:
>
> Forgive me if this was/is discussed already, I am new to the process here....
>
> (code is attached as a playground too)
>
>
>
> Sometimes when I am working with a String? nil can be a reasonable value, and
> what I want to do is something like the following:
>
> import UIKit
>
>
>
> var str:String? = "Hello, playground"
>
>
>
> switch str{
>
> case nil:
>
> print("Nil!")
>
> case "Hello, playground": //it would be super nice if this worked.
>
> print("Match")
>
> default:
>
> print("Some other non nil value?")
>
> }
>
>
>
> But it does not work, the orange text is a compile time error, "Expression
> pattern of type 'String' cannot match value of type 'String?'. I realize that
> this can be replaced with a let statement (case let s where s == "Hello,
> playground":), but that is verbose.
>
> Seems like the compiler could be OK with the orange text, since it is clearly
> not nil.
>
> Thoughts?
>
> -Lucas
>
>
>
>
>
> <NilInSwitchStatements.playground.zip>
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