#Swift uses something like this:
“Simple Fast Value Semantics”, Tibor ‘zupa’ Halter, #Boomla (boomla.com/docs/simple-...).
“isKnownUniquelyReferenced(_:)” (developer.apple.com/documentatio....
Via Lobsters: lobste.rs/s/xo7a4v/sim...
On HN: news.ycombinator.com/item?id=4113...
#PLDI #CopyOnWrite
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