| 1 | fn main() { |
| 2 | list := ['string'] |
| 3 | _ = return_string_or_error() !in list |
| 4 | _ = return_string_or_error() in list |
| 5 | _ = return_string_or_none() in list |
| 6 | _ = return_string_or_error() !in list |
| 7 | } |
| 8 | |
| 9 | fn return_string_or_error() !string { |
| 10 | return '' |
| 11 | } |
| 12 | |
| 13 | fn return_string_or_none() ?string { |
| 14 | return '' |
| 15 | } |
| 16 |