1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
|
//@ check-pass
struct TestA {}
struct TestB {}
impl TestTrait for TestA {
type Output = ();
}
impl TestTrait for TestB {
type Output = ();
}
trait TestTrait {
type Output;
}
impl<A, B> TestTrait for GreeterOutput<A, B>
where
A: TestTrait<Output = ()>,
B: TestTrait<Output = ()>,
{
type Output = ();
}
enum GreeterOutput<A, B>
where
A: TestTrait<Output = ()>,
B: TestTrait<Output = ()>,
{
SayHello(A),
SayGoodbye(B),
}
trait Greeter {
fn test_func(&self, func: &str) -> impl TestTrait<Output = ()> {
match func {
"SayHello" => GreeterOutput::SayHello(TestA {}),
"SayGoodbye" => GreeterOutput::SayGoodbye(TestB {}),
_ => GreeterOutput::SayHello(TestA {}),
}
}
}
fn main() {
println!("Hello, world!");
}
|
