1s complement

main.rs

fn main() {

    // bitwise complement of unsigned int
    let bw: u32 = 1;
    let nbw = !bw;
    assert_eq!(nbw, 4294967294);


    // bitwise complement of signed int
    let bw: i32 = 1;
    let nbw = !bw;
    assert_eq!(nbw, -2);
}