Rust 값 대여

대여한 값이 사용되기 전에 값이 변경되면 에러가 발생한다.

fn main() {
    let mut bag = MyBag { item: 32i32 };
    let b = &mut bag;
    bag.item = 13;// error
    b.item = 5;
    println!("{}", bag.item);
}

  --> src\main.rs:12:5
   |
11 |     let b = &mut bag;
   |             -------- borrow of `bag.item` occurs here
12 |     bag.item = 13;
   |     ^^^^^^^^^^^^^ assignment to borrowed `bag.item` occurs here
13 |     b.item = 5;
   |     ---------- borrow later used here

참고

https://github.com/utilForever/2022-Korea-Rust-Backend