> On Jan 11, 2018, at 11:15 PM, Jean-Daniel via swift-evolution > <swift-evolution@swift.org> wrote: > > A question about the new #unknown behavior. Is it intended to be used for > error handling too ? > Will it be possible to use in catch clause ?
If we go with the #unknown approach, then yes of course it will work in catch clauses. They are patterns, so it naturally falls out. If we go with the “unknown default:” / “unknown case:" approach, then no, this has nothing to do with error handling. IMO, this pivots on the desired semantics for “unknown cases in enums”: if you intentionally try to match on this, do we get a warning or error if you don’t handle all the cases? If we can get to consensus on that point, then the design is pretty obvious IMO. -Chris _______________________________________________ swift-evolution mailing list swift-evolution@swift.org https://lists.swift.org/mailman/listinfo/swift-evolution
