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
|
//@ check-pass
#![feature(lint_reasons)]
use std::fmt::Display;
use std::ops::Deref;
pub trait Foo {
fn bar(self) -> impl Deref<Target = impl Display + ?Sized>;
}
pub struct A;
impl Foo for A {
#[expect(refining_impl_trait)]
fn bar(self) -> &'static str {
"Hello, world"
}
}
pub struct B;
impl Foo for B {
#[expect(refining_impl_trait)]
fn bar(self) -> Box<i32> {
Box::new(42)
}
}
fn main() {
println!("Message for you: {:?}", &*A.bar());
println!("Another for you: {:?}", &*B.bar());
}
|
