[swift-evolution] Consolidate Code for Each Case in Enum

[Anton Zhilin]

2017-01-12 0:51 GMT+03:00 David Sweeris <davesweeris at mac.com>:
>
> I don't understand the lines in the struct version where you assign
> something to `self`. What is ".invalid", for example? I thought you'd
> removed the enum altogether.
>

I totally overlooked it. That can't be done with protocols, scrap that
suggestion.

> But pattern matching on structs is impossible—we can change that with a
> separate proposal. For example, we can allow destructuring
> structs/enums/classes by any combination of their properties:
>
> struct S {
>     var foo: Int
>     var bar: Double
>     var buz: String { return "42" }
> }
> let s = S(foo: 42, bar: 42.0)
> let S(foo: x, buz: z) = s
>
> I was under the impression that we could switch over anything that had the
> `~=` operator defined. Is that not the case?
>

Well, this one is a bit different, but it's horribly off-topic for this
thread.
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