But you can make it work for your types! mikeash.com/pyblog/friday-
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Reminder that copy-on-write in Swift is a feature of Array, Dictionary, etc… not of structs in general. It’s not automatic for your types.
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really!? so all this time, when we’ve been saying “value semantics”, they’re not equal for all value types?
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Huh? No, copy-on-write-ness is what’s different. That’s not part of semantics—it’s an optimization.
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would it be possible to write a category extension that implements this for all your custom structs?