Dangling References

Rust will statically forbid dangling references:

1. fn main() {
2. let ref_x: &i32;
3. {
4. let x: i32 = 10;
5. ref_x = &x;
6. }
7. println!("ref_x: {ref_x}");
8. }

• 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.