| 1 | module main |
| 2 | |
| 3 | interface Backend { |
| 4 | foo() |
| 5 | } |
| 6 | |
| 7 | struct MetalBackend {} |
| 8 | |
| 9 | fn (m MetalBackend) foo() {} |
| 10 | |
| 11 | fn (m MetalBackend) bar() { |
| 12 | println('bar') |
| 13 | } |
| 14 | |
| 15 | fn make_backend() Backend { |
| 16 | return MetalBackend{} |
| 17 | } |
| 18 | |
| 19 | fn main() { |
| 20 | mut backend := make_backend() |
| 21 | if mut backend is MetalBackend { |
| 22 | backend.bar() |
| 23 | } |
| 24 | } |
| 25 |