| use core::pin::Pin; |
| use futures_core::stream::{FusedStream, Stream, TryStream}; |
| use futures_core::task::{Context, Poll}; |
| #[cfg(feature = "sink")] |
| use futures_sink::Sink; |
| use pin_project::pin_project; |
| |
| /// Stream for the [`into_stream`](super::TryStreamExt::into_stream) method. |
| #[pin_project] |
| #[derive(Debug)] |
| #[must_use = "streams do nothing unless polled"] |
| pub struct IntoStream<St> { |
| #[pin] |
| stream: St, |
| } |
| |
| impl<St> IntoStream<St> { |
| #[inline] |
| pub(super) fn new(stream: St) -> Self { |
| IntoStream { stream } |
| } |
| |
| delegate_access_inner!(stream, St, ()); |
| } |
| |
| impl<St: TryStream + FusedStream> FusedStream for IntoStream<St> { |
| fn is_terminated(&self) -> bool { |
| self.stream.is_terminated() |
| } |
| } |
| |
| impl<St: TryStream> Stream for IntoStream<St> { |
| type Item = Result<St::Ok, St::Error>; |
| |
| #[inline] |
| fn poll_next( |
| self: Pin<&mut Self>, |
| cx: &mut Context<'_>, |
| ) -> Poll<Option<Self::Item>> { |
| self.project().stream.try_poll_next(cx) |
| } |
| |
| fn size_hint(&self) -> (usize, Option<usize>) { |
| self.stream.size_hint() |
| } |
| } |
| |
| // Forwarding impl of Sink from the underlying stream |
| #[cfg(feature = "sink")] |
| impl<S: Sink<Item>, Item> Sink<Item> for IntoStream<S> { |
| type Error = S::Error; |
| |
| delegate_sink!(stream, Item); |
| } |