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1 // Regression test for issue #18320.
2 struct CustomStruct {
3 pub:
4     a int
5     b string
6 }
7 
8 interface BaseInterface {
9     a int
10 }
11 
12 fn callback[T](ctx BaseInterface, cb fn (T)) {
13     $if T is BaseInterface {
14         cb(ctx)
15     }
16 }
17 
18 fn main() {
19     custom := CustomStruct{
20         a: 5
21         b: 'test'
22     }
23     callback(custom, fn (ctx CustomStruct) {
24         println(ctx)
25     })
26 }
27

1	// Regression test for issue #18320.
2	struct CustomStruct {
3	pub:
4	a int
5	b string
6	}
7
8	interface BaseInterface {
9	a int
10	}
11
12	fn callback[T](ctx BaseInterface, cb fn (T)) {
13	$if T is BaseInterface {
14	cb(ctx)
15	}
16	}
17
18	fn main() {
19	custom := CustomStruct{
20	a: 5
21	b: 'test'
22	}
23	callback(custom, fn (ctx CustomStruct) {
24	println(ctx)
25	})
26	}
27