tests/ui/async-await/in-trait/coherence-constrained.rs


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24

//@ edition: 2021

trait Foo {
    type T;

    async fn foo(&self) -> Self::T;
}

struct Bar;

impl Foo for Bar {
    type T = ();

    async fn foo(&self) {}
}

impl Foo for Bar {
    //~^ ERROR conflicting implementations of trait `Foo` for type `Bar`
    type T = ();

    async fn foo(&self) {}
}

fn main() {}