enum-max-discriminant.rs

#[repr(i64)]
enum E0 {
    A = 18446744073709551615,
    B = 18446744073709551614
}

/*
#[repr(i8)]
enum E1 {
    A = 256,
    B = 255
}
*/

fn main() {
    println!("{} {}", E0::A as i64, E0::B as u64);
//    println!("{}", E1::A as i8);
    
    let _: u64 = 1 << 63;
    
    println!("{}", 1i64 << 63);
}