File: assumed-wf-bounds-in-impl.rs

package info (click to toggle)
rustc-web 1.78.0%2Bdfsg1-2~deb11u3
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 1,245,360 kB
  • sloc: xml: 147,985; javascript: 18,022; sh: 11,083; python: 10,265; ansic: 6,172; cpp: 5,023; asm: 4,390; makefile: 4,269
file content (29 lines) | stat: -rw-r--r-- 588 bytes parent folder | download | duplicates (6)
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
//@ check-pass
//@ edition: 2021
// issue: 113796


trait AsyncLendingIterator {
    type Item<'a>
    where
        Self: 'a;

    #[allow(async_fn_in_trait)]
    async fn next(&mut self) -> Option<Self::Item<'_>>;
}

struct Lend<I>(I);
impl<I> AsyncLendingIterator for Lend<I> {
    type Item<'a> = &'a I
    where
        Self: 'a;

    // Checking that the synthetic `<Self as AsyncLendingIterator>::next()` GAT
    // is well-formed requires being able to assume the WF types of `next`.

    async fn next(&mut self) -> Option<Self::Item<'_>> {
        todo!()
    }
}

fn main() {}