| 1 | struct Animal { |
| 2 | mut: |
| 3 | age fn (p int) int = unsafe { nil } |
| 4 | duck Duck |
| 5 | } |
| 6 | |
| 7 | struct Duck { |
| 8 | mut: |
| 9 | age &fn (p int) int = unsafe { nil } |
| 10 | } |
| 11 | |
| 12 | fn test_main() { |
| 13 | mut animal := Animal{ |
| 14 | age: fn (x int) int { |
| 15 | return 5 |
| 16 | } |
| 17 | } |
| 18 | animal.duck = Duck{ |
| 19 | age: &animal.age |
| 20 | } |
| 21 | assert animal.duck.age(1) == 5 |
| 22 | } |
| 23 |