Just released a brand new collection type on GitHub with a native Swift wrapper you might like 😎 github.com/intuit/Grouped
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Cool! Why a reference type instead of a value type?
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It made more sense that way to be able to mirror the underlying ObjC structure. Do you see a meaningful diff. as a class?
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Value semantics are enormously different (cf my objc.io article). You do have the tools.
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how do you solve the issue of hoisting "unshare()" calls out of loops, etc? Doesn't that required compiler support?
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Not sure why you need to hoist unshare out of loops if you avoid making a copy of the internal reference until value is mutated
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to be clear, I'm talking about in a Swift wrapper as written - not a from-scratch Swift type (e.g. built with Array)