To
slightly elaborate on yccs27's good answer, at the moment, you can use ? for both Option<T> and Result<T, E>, but you can only use them in functions that return the same type, that is
fn can_use_question_mark_on_option() -> Option<i32> {
fn can_use_question_mark_on_result() -> Result<i32, ()> {
if you have them mixed in the body, they won't work directly. What you should/can do there depends on specifics. For example, if you have a function that returns Option and you have a Result inside, and you want any E to turn into None, you can add .ok() before the ? and then it still looks nice. (The compiler will even suggest this one!)
