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// Repro for <https://github.com/rust-lang/rust/issues/100013#issue-1323807923>.
//@ edition: 2021
//@ revisions: assumptions no_assumptions
//@[assumptions] compile-flags: -Zhigher-ranked-assumptions
//@[assumptions] check-pass
//@[no_assumptions] known-bug: #110338
#![feature(impl_trait_in_assoc_type)]
use std::future::Future;
pub trait FutureIterator: 'static {
type Iterator;
type Future<'s, 'cx>: Future<Output = Self::Iterator> + Send + 'cx
where
's: 'cx;
fn get_iter<'s, 'cx>(&'s self, info: &'cx ()) -> Self::Future<'s, 'cx>;
}
trait IterCaller: 'static {
type Future1<'cx>: Future<Output = ()> + Send + 'cx;
type Future2<'cx>: Future<Output = ()> + Send + 'cx;
fn call_1<'s, 'cx>(&'s self, cx: &'cx ()) -> Self::Future1<'cx>
where
's: 'cx;
fn call_2<'s, 'cx>(&'s self, cx: &'cx ()) -> Self::Future2<'cx>
where
's: 'cx;
}
struct UseIter<FI1, FI2> {
fi_1: FI1,
fi_2: FI2,
}
impl<FI1, FI2> IterCaller for UseIter<FI1, FI2>
where
FI1: FutureIterator + 'static + Send + Sync,
for<'s, 'cx> FI1::Future<'s, 'cx>: Send,
FI2: FutureIterator + 'static + Send + Sync,
{
type Future1<'cx> = impl Future<Output = ()> + Send + 'cx
where
Self: 'cx;
type Future2<'cx> = impl Future<Output = ()> + Send + 'cx
where
Self: 'cx;
fn call_1<'s, 'cx>(&'s self, cx: &'cx ()) -> Self::Future1<'cx>
where
's: 'cx,
{
async {
self.fi_1.get_iter(cx).await;
}
}
fn call_2<'s, 'cx>(&'s self, cx: &'cx ()) -> Self::Future2<'cx>
where
's: 'cx,
{
async {
self.fi_2.get_iter(cx).await;
}
}
}
fn main() {}
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