| 1 | struct Item { |
| 2 | owner_id ?string |
| 3 | } |
| 4 | |
| 5 | fn get_opt() ?int { |
| 6 | return 1 |
| 7 | } |
| 8 | |
| 9 | fn main() { |
| 10 | item := Item{ |
| 11 | owner_id: 'key' |
| 12 | } |
| 13 | arr := [1, 2, 3] |
| 14 | m := { |
| 15 | 'key': 1 |
| 16 | } |
| 17 | |
| 18 | // Optional struct field with map |
| 19 | _ = item.owner_id in m |
| 20 | |
| 21 | // Optional function return with array |
| 22 | _ = get_opt() in arr |
| 23 | } |
| 24 |