Comment by 9rx
6 days ago
> Rust has straightforward support for every part of OOP other than implementation inheritance
Except the only thing that makes OOP OOP: Message passing.
Granted, Swift only just barely supports it, and only for the sake of interop with Objective-C. Still, Swift has better OO support because of it. Rust doesn't even try.
Not that OOP is much of a goal. There is likely good reason why Smalltalk, Objective-C, and Ruby are really the only OOP languages in existence (some esoteric language nobody has ever heard of notwithstanding).
I’m pretty sure when the Ladybird team said “Swift has strictly better OOP support”, they were not referring to ObjC style message passing, so it’s not even relevant.
I'm pretty sure your guessing is silly. I assume you are trying to be here in good faith, so make your case. Since it is not support for message passing, what else makes Swift have "strictly better OOP support"?
That's the thing man, there isn't anything. It was an odd thing in the tweet to say that it has better OOP.
(source: iOS dev from jailbreak days, so like 8 years before Swift, till 2019. He did not mean dynamic dispatch and Swift has dynamic dispatch by way of "you can annotate a Swift method with @objc and we'll emit it as an ObjC method instead of Swift", not Smalltalk-ish, like, at all. if you're the poster who originally said "because of dynamic dispatch", I understand why you're frustrated but I have 0 idea why you think dynamic dispatch in Swift would matter, much less say it makes Swift much better at OOP than Rust. It's impolite to say "utterly baffling engineering decision" in public, so there's subtext in the conversation. Namely that both claims made 0 sense if you had practical familiarity with either)
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You just need to define a trait, then you can use dynamic dispatch.
You can, but then you don't get any of what OOP actually offers. Message passing isn't the same thing as dynamic dispatch. OOP is a very different paradigm.
I think you are both unknowingly talking past each other: my understanding is that Smalltalk-style "object-oriented programming" ("everything is a message!") is quite distinct from C++/C#/Java/Rust "object-oriented programming" ("my structs have methods!")
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