[swift-evolution] [Pitch] Can we make `default` on switches optional?

[Jeremy Pereira]

> On 5 Oct 2016, at 15:29, Haravikk via swift-evolution <swift-evolution at swift.org> wrote:
> 
> 
> I agree with Tim; I'm a +1 for switch! for a convenient means of erroring out, but I think switch? is a bit too different from normal usage of the question-mark.
> 
> One other alternative might be if there could be some kind of switch else syntax, kind of like a guard statement, allowing options on what to do? Only problem is how best to structure it, as the use of break might confusing as to its scope, like so:
> 
> 	switch(foo) else break { // Break from the switch, or the enclosing block?

We already have that in default, The syntax is different, but at least the meaning of break is unambiguous.