| 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
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
 | //@ run-pass
trait Foo: PartialEq<i32> + std::fmt::Debug + Send + Sync {
    fn a(&self) -> i32 {
        10
    }
    fn z(&self) -> i32 {
        11
    }
    fn y(&self) -> i32 {
        12
    }
}
trait Bar: Foo {
    fn b(&self) -> i32 {
        20
    }
    fn w(&self) -> i32 {
        21
    }
}
trait Baz: Bar {
    fn c(&self) -> i32 {
        30
    }
}
impl Foo for i32 {
    fn a(&self) -> i32 {
        100
    }
}
impl Bar for i32 {
    fn b(&self) -> i32 {
        200
    }
}
impl Baz for i32 {
    fn c(&self) -> i32 {
        300
    }
}
fn main() {
    let baz: &dyn Baz = &1;
    let _: &dyn std::fmt::Debug = baz;
    assert_eq!(*baz, 1);
    assert_eq!(baz.a(), 100);
    assert_eq!(baz.b(), 200);
    assert_eq!(baz.c(), 300);
    assert_eq!(baz.z(), 11);
    assert_eq!(baz.y(), 12);
    assert_eq!(baz.w(), 21);
    let bar: &dyn Bar = baz;
    let _: &dyn std::fmt::Debug = bar;
    assert_eq!(*bar, 1);
    assert_eq!(bar.a(), 100);
    assert_eq!(bar.b(), 200);
    assert_eq!(bar.z(), 11);
    assert_eq!(bar.y(), 12);
    assert_eq!(bar.w(), 21);
    let foo: &dyn Foo = baz;
    let _: &dyn std::fmt::Debug = foo;
    assert_eq!(*foo, 1);
    assert_eq!(foo.a(), 100);
    assert_eq!(foo.z(), 11);
    assert_eq!(foo.y(), 12);
    let foo: &dyn Foo = bar;
    let _: &dyn std::fmt::Debug = foo;
    assert_eq!(*foo, 1);
    assert_eq!(foo.a(), 100);
    assert_eq!(foo.z(), 11);
    assert_eq!(foo.y(), 12);
}
 |