RefCell in Rc (to clone shared reference)

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1

Sorry for maybe stupid question, does ReffCell support shared reference clone to same address in memory (like Rc does) or it's correct to cover RefCell in Rc?

Seems I don't want Rc in case to clone to another thread (as no warnings from analyzer)

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Yo do if you need shared ownership to your RefCell, which you usually want. Rc<RefCell<T>> is the classic type you use to get single-threaded interior mutability.

If you want multi-threaded access to the same memory region, you'd have to use thread-safe types like Arc<Mutex<T>> or Arc<RwLock<T>> instead.

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A RefCell is a Cell, not a Ref, in the same way that a housecat is a cat, not a house. In other words, RefCell isn't a reference or smart pointer, so cloning it doesn't give you "another" reference, whether to the same address or something else. A RefCell<T> contains a T, so cloning it just gives you another RefCell<T> that contains a new, cloned T.

When you .borrow() a RefCell, that gives you a Ref<T>, which is a smart pointer, and can be cloned, although (unlike Rc) it doesn't implement Clone.

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Thanks for explain, guys

When you .borrow() a RefCell, that gives you a Ref<T>, which is a smart pointer, and can be cloned, although (unlike Rc) it doesn't implement Clone.

Clear!