I do not understand when you need a loan?

Question

Rust

It's hard for me to understand when to use links, and when the arguments themselves? Like self and &self or when should the function return a reference(fn some_fn(v) -> (&)i32)?

Answer 1

If a function receives a reference, then it does not control its lifetime. When a function has received an object not by reference, it owns it and no one else has access to it until the function returns it or passes it somewhere. If the function did not return it and did not save it anywhere, the memory occupied by the object is freed when the function ends.