Dangling References

Rust will statically forbid dangling references:

fn main() {
    let ref_x: &i32;
        let x: i32 = 10;
        ref_x = &x;
    println!("ref_x: {ref_x}");
  • A reference is said to “borrow” the value it refers to.
  • Rust is tracking the lifetimes of all references to ensure they live long enough.
  • We will talk more about borrowing when we get to ownership.