src/test/ui/impl-trait/issue-55872-2.rs


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19

// edition:2018

#![feature(type_alias_impl_trait)]

pub trait Bar {
    type E: Send;

    fn foo<T>() -> Self::E;
}

impl<S> Bar for S {
    type E = impl std::marker::Send;
    fn foo<T>() -> Self::E {
        async {}
        //~^ ERROR type parameter `T` is part of concrete type but not used in parameter list for the `impl Trait` type alias
    }
}

fn main() {}