fn my_fn<T>(t: T, t2: i8) -> i32

    where i8: std::convert::From<T>
{
    let new_t = i8::from(t);
    if new_t == t2 {
        0
    } else {
        i32::from(new_t + t2)
    }
}

#[test]
fn test_t() {
    let t: i8 = 32;
    assert_eq!(my_fn(t, 3), 35);
}