| 58 | type Output = Result<A, Report<[C]>>; |
| 59 | |
| 60 | fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> { |
| 61 | let mut this = self.project(); |
| 62 | |
| 63 | let value = loop { |
| 64 | if *this.context_len >= *this.context_bound { |
| 65 | break mem::replace(this.output, Ok(A::default())); |
| 66 | } |
| 67 | |
| 68 | let next = ready!(this.stream.as_mut().try_poll_next(cx)); |
| 69 | match (next, &mut *this.output) { |
| 70 | (Some(Ok(value)), Ok(output)) => { |
| 71 | output.extend(core::iter::once(value)); |
| 72 | } |
| 73 | (Some(Ok(_)), Err(_)) => { |
| 74 | // we're now just consuming the iterator to return all related errors |
| 75 | // so we can just ignore the output |
| 76 | } |
| 77 | (Some(Err(error)), output @ Ok(_)) => { |
| 78 | *output = Err(error.into()); |
| 79 | *this.context_len += 1; |
| 80 | } |
| 81 | (Some(Err(error)), Err(report)) => { |
| 82 | report.append(error.into()); |
| 83 | *this.context_len += 1; |
| 84 | } |
| 85 | (None, output) => { |
| 86 | break mem::replace(output, Ok(A::default())); |
| 87 | } |
| 88 | } |
| 89 | }; |
| 90 | |
| 91 | Poll::Ready(value) |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | /// Trait extending [`TryStream`] with methods for collecting error-stack results in a fail-slow |