use std::convert::TryFrom;

fn main() {
    let v = 257usize;
    println!(
        "{:?} {:?} {:?} {:?} {:?}",
        u8::try_from(v),
        i8::try_from(v),
        u32::try_from(v),
        i32::try_from(v),
        u64::try_from(v)
    );
}