| 1 | struct Foo { |
| 2 | mut: |
| 3 | func ?fn (voidptr) bool = unsafe { nil } |
| 4 | } |
| 5 | |
| 6 | fn callback(foo &Foo) bool { |
| 7 | return foo.func != none |
| 8 | } |
| 9 | |
| 10 | type OptFn = fn (&Foo) bool |
| 11 | |
| 12 | fn test_main() { |
| 13 | t := Foo{ |
| 14 | func: callback |
| 15 | } |
| 16 | assert t.func? == callback |
| 17 | if t.func != none { |
| 18 | assert t.func(&t) |
| 19 | } else { |
| 20 | assert false |
| 21 | } |
| 22 | |
| 23 | a := ?OptFn(callback) |
| 24 | if a != none { |
| 25 | assert a(&t) |
| 26 | } else { |
| 27 | assert false |
| 28 | } |
| 29 | } |
| 30 |