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fix explanation of 'zero bytes read' case #6790

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Aug 19, 2024
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fix explanation of 'zero bytes read' case #6790

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3 changes: 2 additions & 1 deletion tokio/src/io/async_read.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -18,7 +18,8 @@ use std::task::{Context, Poll};
/// * `Poll::Ready(Ok(()))` means that data was immediately read and placed into
/// the output buffer. The amount of data read can be determined by the
/// increase in the length of the slice returned by `ReadBuf::filled`. If the
/// difference is 0, EOF has been reached.
/// difference is 0, either EOF has been reached, or the output buffer had zero
/// capacity (i.e. `buf.remaining()` == 0).
///
/// * `Poll::Pending` means that no data was read into the buffer
/// provided. The I/O object is not currently readable but may become readable
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