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Add warning to BufWriter documentation #43136

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Jul 12, 2017
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Add warning to BufWriter documentation #43136

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6 changes: 5 additions & 1 deletion src/libstd/io/buffered.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -276,7 +276,10 @@ impl<R: Seek> Seek for BufReader<R> {
/// `BufWriter` keeps an in-memory buffer of data and writes it to an underlying
/// writer in large, infrequent batches.
///
/// The buffer will be written out when the writer is dropped.
/// When the `BufWriter` is dropped, the contents of its buffer will be written
/// out. However, any errors that happen in the process of flushing the buffer
/// when the writer is dropped will be ignored. Code that wishes to handle such
/// errors must manually call [`flush`] before the writer is dropped.
///
/// # Examples
///
Expand Down Expand Up @@ -316,6 +319,7 @@ impl<R: Seek> Seek for BufReader<R> {
/// [`Write`]: ../../std/io/trait.Write.html
/// [`Tcpstream::write`]: ../../std/net/struct.TcpStream.html#method.write
/// [`TcpStream`]: ../../std/net/struct.TcpStream.html
/// [`flush`]: #method.flush
#[stable(feature = "rust1", since = "1.0.0")]
pub struct BufWriter<W: Write> {
inner: Option<W>,
Expand Down