async-std/CHANGELOG.md

Changelog

All notable changes to async-std will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

Unreleased

0.99.9 - 2019-10-08

This patch upgrades our futures-rs version, allowing us to build on the 1.39 beta. Additionally we've introduced map and for_each to Stream. And we've added about a dozen new FromStream implementations for std types, bringing us up to par with std's FromIterator implementations.

And finally we've added a new "unstable" task::blocking function which can be used to convert blocking code into async code using a threadpool. We've been using this internally for a while now to async-std to power our fs and net::SocketAddr implementations. With this patch userland code now finally has access to this too.

Example

Create a stream of tuples, and collect into a hashmap

let a = stream::once(1u8);
let b = stream::once(0u8);

let s = a.zip(b);

let map: HashMap<u8, u8> = s.collect().await;
assert_eq!(map.get(&1), Some(&0u8));

Spawn a blocking task on a dedicated threadpool

task::blocking(async {
    println!("long-running task here");
}).await;

Added

• Added stream::Stream::map
• Added stream::Stream::for_each
• Added stream::Stream::try_for_each
• Added task::blocking as "unstable"
• Added FromStream for all std::{option, collections, result, string, sync} types.
• Added the path submodule as "unstable".

Changed

• Updated futures-preview to 0.3.0-alpha.19, allowing us to build on rustc 1.39.0-beta.
• As a consequence of this upgrade, all of our concrete stream implementations now make use of Stream::size_hint to optimize internal allocations.
• We now use GitHub Actions through actions-rs, in addition to Travis CI. We intend to fully switch in the near future.
• Fixed a bug introduced in 0.99.6 where Unix Domain Listeners would sometimes become unresponsive.
• Updated our sync::Barrier docs to match std.
• Updated our stream::FromStream docs to match std's FromIterator.

0.99.8 - 2019-09-28

Added

• Added README to examples directory.
• Added concurrency documentation to the futures submodule.
• Added io::Read::take method.
• Added io::Read::by_ref method.
• Added io::Read::chain method.

Changed

• Pin futures-preview to 0.3.0-alpha.18, to avoid rustc upgrade problems.
• Simplified extension traits using a macro.
• Use the broadcast module with std::sync::Mutex, reducing dependencies.

0.99.7 - 2019-09-26

Added

• Added future::join macro as "unstable"
• Added future::select macro as "unstable"
• Added future::try_join macro as "unstable"
• Added future::try_select macro as "unstable"
• Added io::BufWriter struct
• Added stream::Extend trait
• Added stream::Stream::chain method
• Added stream::Stream::filter method
• Added stream::Stream::inspect method
• Added stream::Stream::skip_while method
• Added stream::Stream::skip method
• Added stream::Stream::step_by method
• Added sync::Arc struct from stdlib
• Added sync::Barrier struct as "unstable"
• Added sync::Weak struct from stdlib
• Added task::ready macro as "unstable"

Changed

• Correctly marked the pin submodule as "unstable" in the docs
• Updated tutorial to have certain functions suffixed with _loop
• io traits are now re-exports of futures-rs types, allowing them to be implemented
• stream traits are now re-exports of futures-rs types, allowing them to be implemented
• prelude::* now needs to be in scope for functions io and stream traits to work

0.99.6 - 2019-09-19

Added

• Added stream::Stream::collect as "unstable"
• Added stream::Stream::enumerate
• Added stream::Stream::fuse
• Added stream::Stream::fold
• Added stream::Stream::scan
• Added stream::Stream::zip
• Added stream::join macro as "unstable"
• Added stream::DoubleEndedStream as "unstable"
• Added stream::FromStream trait as "unstable"
• Added stream::IntoStream trait as "unstable"
• Added io::Cursor as "unstable"
• Added io::BufRead::consume method
• Added io::repeat
• Added io::Slice and io::SliceMut
• Added documentation for feature flags
• Added pin submodule as "unstable"
• Added the ability to collect a stream of Result<T, E>s into a Result<impl FromStream<T>, E>

Changed

• Refactored the scheduling algorithm of our executor to use work stealing
• Refactored the network driver, removing 400 lines of code
• Removed the Send bound from task::block_on
• Removed Unpin bound from impl<T: futures::stream::Stream> Stream for T

0.99.5 - 2019-09-12

Added

• Added tests for io::timeout
• Added io::BufRead::fill_buf, an async fn counterpart to poll_fill_buf
• Added fs::create_dir_all
• Added future::timeout, a free function to time out futures after a threshold
• Added io::prelude
• Added net::ToSocketAddrs, a non-blocking version of std's ToSocketAddrs
• Added stream::Stream::all
• Added stream::Stream::filter_map
• Added stream::Stream::find_map
• Added stream::Stream::find
• Added stream::Stream::min_by
• Added stream::Stream::nth

Changed

• Polished the text and examples of the tutorial
• cargo fmt on all examples
• Simplified internals of TcpStream::connect_to
• Modularized our CI setup, enabled a rustfmt fallback, and improved caching
• Reduced our dependency on the futures-rs crate, improving compilation times
• Split io::Read, io::Write, io::BufRead, and stream::Stream into multiple files
• fs::File now flushes more often to prevent flushes during seek
• Updated all dependencies
• Fixed a bug in the conversion of File into raw handle
• Fixed compilation errors on the latest nightly

Removed

0.99.4 - 2019-08-21

Changes

• Many small changes in the book, mostly typos
• Documentation fixes correcting examples
• Now works with recent nightly with stabilised async/await (> 2019-08-21)

0.99.3 - 2019-08-16

• Initial beta release