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//@ check-pass
//@ edition: 2021
use std::marker::PhantomData;
pub struct Struct<I, T>(PhantomData<fn() -> <Self as It>::Item>)
where
Self: It;
impl<I> It for Struct<I, I::Item>
where
I: It,
{
type Item = ();
}
pub trait It {
type Item;
}
fn f() -> impl Send {
async {
let _x = Struct::<Empty<&'static ()>, _>(PhantomData);
async {}.await;
}
}
pub struct Empty<T>(PhantomData<fn() -> T>);
impl<T> It for Empty<T> {
type Item = T;
}
fn main() {}
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