30 lines
585 B
Rust
30 lines
585 B
Rust
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// check-pass
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// edition: 2021
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// issue: 113796
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#![feature(async_fn_in_trait)]
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trait AsyncLendingIterator {
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type Item<'a>
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where
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Self: 'a;
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async fn next(&mut self) -> Option<Self::Item<'_>>;
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}
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struct Lend<I>(I);
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impl<I> AsyncLendingIterator for Lend<I> {
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type Item<'a> = &'a I
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where
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Self: 'a;
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// Checking that the synthetic `<Self as AsyncLendingIterator>::next()` GAT
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// is well-formed requires being able to assume the WF types of `next`.
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async fn next(&mut self) -> Option<Self::Item<'_>> {
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todo!()
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}
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}
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fn main() {}
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