rustRust borrow checker example

The Rust borrow checker is a compile-time mechanism that ensures memory safety in Rust programs. It prevents data races and other memory safety issues by enforcing the borrowing rules.

Example code

fn main() {
    let mut x = 5;
    let y = &mut x;
    *y += 1;
    println!("x = {}", x);
}

Output example

x = 6

The code above shows an example of the Rust borrow checker in action. The code declares a mutable variable x and creates a mutable reference y to it. The code then attempts to modify the value of x through the reference y. The Rust borrow checker will detect this and prevent the code from compiling, as it would result in a data race.

Parts of the code:

• let mut x = 5;: declares a mutable variable x with an initial value of 5.
• let y = &mut x;: creates a mutable reference y to x.
• *y += 1;: attempts to modify the value of x through the reference y.

Helpful links

• Rust Borrow Checker

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