error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `std::ops::Try`)
--> $DIR/try-on-option.rs:13:5
|
-LL | x?;
- | ^^ cannot use the `?` operator in a function that returns `u32`
+LL | / fn bar() -> u32 {
+LL | | let x: Option<u32> = None;
+LL | | x?;
+ | | ^^ cannot use the `?` operator in a function that returns `u32`
+LL | | 22
+LL | | }
+ | |_- this function should return `Result` or `Option` to accept `?`
|
= help: the trait `std::ops::Try` is not implemented for `u32`
= note: required by `std::ops::Try::from_error`