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docs: notes on poll_frame return values #144

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Jan 31, 2025
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docs: notes on poll_frame return values #144

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0829679
docs: notes on poll_frame return values
cratelyn Jan 10, 2025
eeafd33
review: update stale "data buffer" terminology
cratelyn Jan 10, 2025
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17 changes: 16 additions & 1 deletion http-body/src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -43,7 +43,22 @@ pub trait Body {
type Error;

#[allow(clippy::type_complexity)]
/// Attempt to pull out the next data buffer of this stream.
/// Attempt to pull out the next frame of this stream.
///
/// # Return value
///
/// This function returns:
///
/// - [`Poll::Pending`] if the next frame is not ready yet.
/// - [`Poll::Ready(Some(Ok(frame)))`] when the next frame is available.
/// - [`Poll::Ready(Some(Err(error)))`] when an error has been reached.
/// - [`Poll::Ready(None)`] means that all of the frames in this stream have been returned, and
/// that the end of the stream has been reached.
///
/// If [`Poll::Ready(Some(Err(error)))`] is returned, this body should be discarded.
///
/// Once the end of the stream is reached, implementations should continue to return
/// [`Poll::Ready(None)`].
fn poll_frame(
self: Pin<&mut Self>,
cx: &mut Context<'_>,
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