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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_lite::pin_project;
pin_project! {
/// Stream for the [`into_stream`](super::TryStreamExt::into_stream) method.
#[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 {
Self { 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);
}