Evolution idea: implicit return in single-line switch cases

Evolution Discussion
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6

This is something I have wished for ever since implicit returns were introduced.

However, I see it as purely a generalization of the current rules for implicit returns, to allow branching using control flow statements, rather than just treating control flow blocks as expressions universally.

IOW I’m not a huge fan of things like using a switch on the right hand of an assignment expression (let result = switch value { … }), but I do wish I could use implicit returns in control flow as a generalization of the current implicit return rules. :grinning:

[Note: I most often find myself wanting this when switching over self on an enum.]

enum Pet {
    case dog, cat, bird, other(String)

    var description: String {
        switch self {
            case .dog: "Dog"
            case .cat: "Cat"
            case .bird: "Bird"
            case .other(let petName): petName
    }
}
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