🔒The borrow checker in Rust enforces rules to ensure memory safety.
🔄Interior mutability allows for mutating values even in situations where the borrow checker restricts it.
❗Cell and RefCell are smart pointers in Rust that implement interior mutability.
🔗RefCell allows for multiple mutable references within the same scope, but with runtime borrow checking.
🧵Cell provides interior mutability for copyable types and ensures thread safety.
Why do we need interior mutability in Rust?
—Interior mutability is needed in Rust to work around situations where the borrow checker's strict rules prevent mutation of values.
What is the difference between Cell and RefCell?
—Cell provides interior mutability for copyable types and ensures thread safety, while RefCell allows for multiple mutable references within the same scope, with runtime borrow checking.
Can I use interior mutability on non-copyable types?
—Yes, you can use RefCell to provide interior mutability even for non-copyable types, but it requires runtime borrow checking.
When should I use interior mutability in Rust?
—Interior mutability should be used when you need to mutate values in situations where the borrow checker's rules would prevent it.
Is interior mutability safe?
—Interior mutability is safe as long as you follow the borrowing rules and avoid data races in concurrent situations.
00:00The borrow checker in Rust enforces rules to ensure memory safety.
01:15Interior mutability allows for mutating values even in situations where the borrow checker restricts it.
03:30Cell and RefCell are smart pointers in Rust that implement interior mutability.
05:45RefCell allows for multiple mutable references within the same scope, but with runtime borrow checking.
07:30Cell provides interior mutability for copyable types and ensures thread safety.
