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@alter_kaker
If you’re reading the tutorial/guide, I’m sure they don’t advertise. It’s a good tutorial, but it’s there to help newcomers get comfortable and not to explain the language’s structure. The reference manual gets more into that.

If you want to dig into how Swift implements optionals, you might find this exercise that I give my p-lang students useful: https://github.com/mac-comp381/swift-optional-desugaring