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Yes, but so does Rust. Reference counting is orthogonal to, although related to, to borrow checking.

Vala's wiki has a page all about its ownership mechanism: https://wiki.gnome.org/Projects/Vala/Ownership

Rust does not use reference counting for ownership, or borrow checking. It is true that you can introduce it for your own types though, with Rc/Arc. That's not really "rust using" it though; it's just a library.

Thanks for the link, I'll dig in!

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