diff options
Diffstat (limited to '')
-rw-r--r-- | src/test/ui/async-await/in-trait/issue-102138.rs | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/src/test/ui/async-await/in-trait/issue-102138.rs b/src/test/ui/async-await/in-trait/issue-102138.rs new file mode 100644 index 000000000..f61b34ed9 --- /dev/null +++ b/src/test/ui/async-await/in-trait/issue-102138.rs @@ -0,0 +1,46 @@ +// check-pass +// edition:2021 + +#![feature(async_fn_in_trait)] +#![allow(incomplete_features)] + +use std::future::Future; + +async fn yield_now() {} + +trait AsyncIterator { + type Item; + async fn next(&mut self) -> Option<Self::Item>; +} + +struct YieldingRange { + counter: u32, + stop: u32, +} + +impl AsyncIterator for YieldingRange { + type Item = u32; + + async fn next(&mut self) -> Option<Self::Item> { + if self.counter == self.stop { + None + } else { + let c = self.counter; + self.counter += 1; + yield_now().await; + Some(c) + } + } +} + +async fn async_main() { + let mut x = YieldingRange { counter: 0, stop: 10 }; + + while let Some(v) = x.next().await { + println!("Hi: {v}"); + } +} + +fn main() { + let _ = async_main(); +} |