$ cargo run
   Compiling enums v0.1.0 (file:///projects/enums)
error[E0277]: cannot add `std::option::Option<i8>` to `i8`
 --> src/main.rs:5:17
  |
5 |     let sum = x + y;
  |                 ^ no implementation for `i8 + std::option::Option<i8>`
  |
  = help: the trait `std::ops::Add<std::option::Option<i8>>` is not implemented for `i8`

error: aborting due to previous error

For more information about this error, try `rustc --explain E0277`.
error: could not compile `enums`.

To learn more, run the command again with --verbose.
