error_handle.ai

// class FileNotFound! {
//     name: str,
// }
// print(FileNotFound!);

enum IOError! {
    DiskFull = "the disk is fulled",
    Interrupted = "io is interrupted",
}
// print(IOError!);

// fn check_error(e: IOError!) {
//     print(e);
// }

// check_error(IOError!::DiskFull);

enum ArithError! {
    DivideZero,
}

fn divide(a, b) -> int | ArithError! {
    if b == 0 {
        raise ArithError!::DivideZero;
    }

    return a / b;
}

fn do_math() {
    let x = 0;
    let v = divide(1, 0) |err| {
        let a = 1;
        print("error:", err);
        999
    };
    print(v);
    // let y = divide(1, 1)?;
    // print(y);
}

let x = do_math();
print(x);
// {
//     print(1);
//     let a = IOError!::DiskFull;
//     let x = a;
// }