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async-std v1.3.0 Release Notes

Release Date: 2019-12-12 // over 4 years ago

  • 📚 API Documentation

    This patch introduces Stream::delay, more methods on DoubleEndedStream, and improves compile times. Stream::delay is a new API that's similar to 📄 task::sleep, but can be passed as part of as stream, rather than as a separate block. This is 👉 useful for examples, or when manually debugging race conditions.

    Examples

    let start = Instant::now();
let mut s = stream::from_iter(vec![0u8, 1]).delay(Duration::from_millis(200));

// The first time will take more than 200ms due to delay.
s.next().await;
assert!(start.elapsed().as_millis() >= 200);

// There will be no delay after the first time.
s.next().await;
assert!(start.elapsed().as_millis() <= 210);

    ➕ Added

    • ➕ Added Stream::delay as "unstable" (#309)
    • ➕ Added DoubleEndedStream::next_back as "unstable" (#562)
    • ➕ Added DoubleEndedStream::nth_back as "unstable" (#562)
    • ➕ Added DoubleEndedStream::rfind as "unstable" (#562)
    • ➕ Added DoubleEndedStream::rfold as "unstable" (#562)
    • ➕ Added DoubleEndedStream::try_rfold as "unstable" (#562)
    • stream::Once now implements DoubleEndedStream (#562)
    • stream::FromIter now implements DoubleEndedStream (#562)

    🔄 Changed

    • ✂ Removed our dependency on async-macros, speeding up compilation (#610)

    🛠 Fixes

    • 🛠 Fixed a link in the task docs (#598)
    • 🛠 Fixed the UdpSocket::recv example (#603)
    • 🛠 Fixed a link to task::block_on (#608)
    • 🛠 Fixed an incorrect API mention in task::Builder (#612)
    • 🛠 Fixed leftover mentions of futures-preview (#595)
    • 🛠 Fixed a typo in the tutorial (#614)
    • <TcpStream as Write>::poll_close now closes the write half of the stream (#618)