rust/tests/ui/issues/issue-56229.rs
2024-02-16 20:02:50 +00:00

36 lines
480 B
Rust

//@ check-pass
trait Mirror {
type Other;
}
#[derive(Debug)]
struct Even(usize);
struct Odd;
impl Mirror for Even {
type Other = Odd;
}
impl Mirror for Odd {
type Other = Even;
}
trait Dyn<T: Mirror>: AsRef<<T as Mirror>::Other> {}
impl Dyn<Odd> for Even {}
impl AsRef<Even> for Even {
fn as_ref(&self) -> &Even {
self
}
}
fn code<T: Mirror>(d: &dyn Dyn<T>) -> &T::Other {
d.as_ref()
}
fn main() {
println!("{:?}", code(&Even(22)));
}