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iOS engineer who worked on the Fabric app here :) I gave a talk about this topic at a Swift conference last year, if you wanna check that out! https://www.youtube.com/watch?v=Ent6L…

Oh yeah that's a good point! (and a really interesting optimization that can be applied to immutable values)

I agree that it would be a little cleaner, because it would express the intention better (the fact that you're simply giving out the same error). However, the type would be wrong: …

Yeah, this is correct. This would be wrong: func map (f: T -> U) -> Result { switch self { case let .Value(value): return Result .Value(Box(f(value.unbox))) case let .Error(error):…

Thanks! I think that would make for another interesting article. I purposely ignored those details to make sure I kept my article more practical and less academic :) I also didn't …