[swift-evolution] A native option set construct

[Dan Stenmark]

One of the things that surprised me is that there still isn’t concise syntax for creating option sets, a pattern I see out in the wild a fair bit.  While Swift 2 did introduce OptionSetType for structs, it still feels somewhat obtuse and non-obvious.  It would be great if we could something like:

options NotSoSecretVariations {
	case ProteinStyle,
	case AnimalStyle,
	case GrilledOnions,
	...
}

That said, I have a feeling this isn’t the first time the Swift team has come across a pitch like this.  If this really is unfeasible, it would be great and really educational to hear what the challenges are.

Dan
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