| $ cargo run |
| Compiling enums v0.1.0 (file:///projects/enums) |
| error[E0277]: cannot add `Option<i8>` to `i8` |
| --> src/main.rs:5:17 |
| | |
| 5 | let sum = x + y; |
| | ^ no implementation for `i8 + Option<i8>` |
| | |
| = help: the trait `Add<Option<i8>>` is not implemented for `i8` |
| = help: the following other types implement trait `Add<Rhs>`: |
| <i8 as Add> |
| <i8 as Add<&i8>> |
| <&'a i8 as Add<i8>> |
| <&i8 as Add<&i8>> |
| |
| For more information about this error, try `rustc --explain E0277`. |
| error: could not compile `enums` (bin "enums") due to 1 previous error |