To ensure memory and thread safety, Rust's borrow checker has three simple rules. They are enforced all through the code except in unsafe scopes. Here they are:
- Each binding will have an owner
- There can only be one owner for a binding
- When the owner goes out of the scope, the binding gets dropped
These three rules seem simple enough, but they have a great implication on how we code. The compiler can know beforehand when an owner goes out of scope, so it will always know when to drop/destruct a binding/variable. This means that you can write your code without having to think about where you create variables, where you call destructors, or whether you have already called a destructor or you are calling it twice. ...
