gistfile1.txt

fn unwrap<T, U>(-res: result<T, U>) -> T unsafe {
    let addr = alt res {
      ok(x) { ptr::addr_of(x) }
      err(_) { fail "option none" }
    };
    let liberated_value = unsafe::reinterpret_cast(*addr);
    unsafe::forget(res);
    ret liberated_value;
}