I wrote an article for this month's on how to use value types to improve your code's flexibility + clarity.
objc.io/issue-16/swift
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FWIW function values are also reference types (observable via captures).
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Word, thank you. I'll see if I can slip in a note about how putting closures in a value type can create dependencies.
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Dunno how special it is. It's the same as putting class references in a value, really.
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Absolutely: I just think it's worth a specific callout because it's slightly less intuitive how this could create harm.