Lesson 11

Reborrowing and Rust's Invisible Lifetimes

We dig further into reborrowing, to learn about the invisible lifetime information attached to every reference type.

Coding Practice

Example: Move vs Reborrow

// https://rustcurious.com/11

// Example: Move vs Reborrow
//
// Add an explicit type for `c` to change the
// assignment from a move into a reborrow.
//
// Alternatives to try:
//
//     let c: &mut i32 = b;
//     let c: &mut _ = b;
//     let c = b as &mut _;
//     let c = &mut *b;

fn main() {
    let mut a = 10;
    let b = &mut a;
    *b += 1;
    let c = b;
    *c += 1;

    *b += 1;

    println!("{}", a);
}