#![allow(dead_code, deprecated, unused_variables, unused_mut)]
fn main() {
    let good_result: Result<i32, i32> = Ok(10);
    let bad_result: Result<i32, i32> = Err(10);
    assert!(good_result.is_ok() && ! good_result.is_err());
    assert!(bad_result.is_err() && ! bad_result.is_ok());
    let good_result: Result<i32, i32> = good_result.map(|i| i + 1);
    let bad_result: Result<i32, i32> = bad_result.map_err(|i| i - 1);
    assert_eq!(good_result, Ok(11));
    assert_eq!(bad_result, Err(9));
    let good_result: Result<bool, i32> = good_result.and_then(|i| Ok(i == 11));
    assert_eq!(good_result, Ok(true));
    let bad_result: Result<i32, i32> = bad_result.or_else(|i| Ok(i + 20));
    assert_eq!(bad_result, Ok(29));
    let final_awesome_result = good_result.unwrap();
    assert!(final_awesome_result)
}