[swift-evolution] [discussion] Class stored properties?

Robert Widmann rwidmann at apple.com
Wed Aug 9 13:09:05 CDT 2017


This is a singleton, it just happens to be in class scope.

~Robert Widmann

> On Aug 9, 2017, at 3:55 AM, Mathew Huusko V via swift-evolution <swift-evolution at swift.org> wrote:
> 
> Curious if class stored properties have ever been discussed (doesn't seem so..)?
> 
> Also, assuming no, and assuming there's a good reason no/they're not coming anytime soon, what are some patterns people have been using in their place? I was considering something like..
> 
> class SomeClass {
>     private static var _classValues = [SomeClass.Type: Int]()
> 
>     class var value: Int {
>         get { _classValues[self] }
>         set { _classValues[self] = newValue }
>     }
> }
> 
> .. but then I remembered types aren't hashable yet either (so I guess I need to stringify it first).
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