From 4c3699f01a3d1cb51e5cd1c0e913a3739adc4fc9 Mon Sep 17 00:00:00 2001 From: Josh Stone Date: Fri, 12 Nov 2021 08:17:57 -0800 Subject: [PATCH] Add 1.57.0 release notes --- RELEASES.md | 114 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 114 insertions(+) diff --git a/RELEASES.md b/RELEASES.md index a38ab7cabf46..4b9b20f4cba6 100644 --- a/RELEASES.md +++ b/RELEASES.md @@ -1,3 +1,117 @@ +Version 1.57.0 (2021-12-02) +========================== + +Language +-------- + +- [Macro attributes may follow `#[derive]` and will see the original (pre-`cfg`) input.][87220] +- [Accept curly-brace macros in expressions, like `m!{ .. }.method()` and `m!{ .. }?`.][88690] +- [Allow panicking in constant evaluation.][89508] + +Compiler +-------- + +- [Create more accurate debuginfo for vtables.][89597] +- [Add `armv6k-nintendo-3ds` at Tier 3\*.][88529] +- [Add `armv7-unknown-linux-uclibceabihf` at Tier 3\*.][88952] +- [Add `m68k-unknown-linux-gnu` at Tier 3\*.][88321] +- [Add SOLID targets at Tier 3\*:][86191] `aarch64-kmc-solid_asp3`, `armv7a-kmc-solid_asp3-eabi`, `armv7a-kmc-solid_asp3-eabihf` + +\* Refer to Rust's [platform support page][platform-support-doc] for more + information on Rust's tiered platform support. + +Libraries +--------- + +- [Avoid allocations and copying in `Vec::leak`][89337] +- [Add `#[repr(i8)]` to `Ordering`][89507] +- [Optimize `File::read_to_end` and `read_to_string`][89582] +- [Update to Unicode 14.0][89614] +- [Many more functions are marked `#[must_use]`][89692], producing a warning + when ignoring their return value. This helps catch mistakes such as expecting + a function to mutate a value in place rather than return a new value. + +Stabilised APIs +--------------- + +- [`[T; N]::as_mut_slice`][`array::as_mut_slice`] +- [`[T; N]::as_slice`][`array::as_slice`] +- [`collections::TryReserveError`] +- [`HashMap::try_reserve`] +- [`HashSet::try_reserve`] +- [`String::try_reserve`] +- [`String::try_reserve_exact`] +- [`Vec::try_reserve`] +- [`Vec::try_reserve_exact`] +- [`VecDeque::try_reserve`] +- [`VecDeque::try_reserve_exact`] +- [`Iterator::map_while`] +- [`iter::MapWhile`] +- [`proc_macro::is_available`] +- [`Command::get_program`] +- [`Command::get_args`] +- [`Command::get_envs`] +- [`Command::get_current_dir`] +- [`CommandArgs`] +- [`CommandEnvs`] + +These APIs are now usable in const contexts: + +- [`hint::unreachable_unchecked`] + +Cargo +----- + +- [Stabilize custom profiles][cargo/9943] + +Compatibility notes +------------------- + +Internal changes +---------------- +These changes provide no direct user facing benefits, but represent significant +improvements to the internals and overall performance of rustc +and related tools. + +- [Added an experimental backend for codegen with `libgccjit`.][87260] + +[86191]: https://github.com/rust-lang/rust/pull/86191/ +[87220]: https://github.com/rust-lang/rust/pull/87220/ +[87260]: https://github.com/rust-lang/rust/pull/87260/ +[88243]: https://github.com/rust-lang/rust/pull/88243/ +[88321]: https://github.com/rust-lang/rust/pull/88321/ +[88529]: https://github.com/rust-lang/rust/pull/88529/ +[88690]: https://github.com/rust-lang/rust/pull/88690/ +[88952]: https://github.com/rust-lang/rust/pull/88952/ +[89337]: https://github.com/rust-lang/rust/pull/89337/ +[89507]: https://github.com/rust-lang/rust/pull/89507/ +[89508]: https://github.com/rust-lang/rust/pull/89508/ +[89582]: https://github.com/rust-lang/rust/pull/89582/ +[89597]: https://github.com/rust-lang/rust/pull/89597/ +[89614]: https://github.com/rust-lang/rust/pull/89614/ +[89692]: https://github.com/rust-lang/rust/issues/89692/ +[cargo/9943]: https://github.com/rust-lang/cargo/pull/9943/ +[`array::as_mut_slice`]: https://doc.rust-lang.org/std/primitive.array.html#method.as_mut_slice +[`array::as_slice`]: https://doc.rust-lang.org/std/primitive.array.html#method.as_slice +[`collections::TryReserveError`]: https://doc.rust-lang.org/std/collections/struct.TryReserveError.html +[`HashMap::try_reserve`]: https://doc.rust-lang.org/std/collections/hash_map/struct.HashMap.html#method.try_reserve +[`HashSet::try_reserve`]: https://doc.rust-lang.org/std/collections/hash_set/struct.HashSet.html#method.try_reserve +[`String::try_reserve`]: https://doc.rust-lang.org/alloc/string/struct.String.html#method.try_reserve +[`String::try_reserve_exact`]: https://doc.rust-lang.org/alloc/string/struct.String.html#method.try_reserve_exact +[`Vec::try_reserve`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.try_reserve +[`Vec::try_reserve_exact`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.try_reserve_exact +[`VecDeque::try_reserve`]: https://doc.rust-lang.org/std/collections/struct.VecDeque.html#method.try_reserve +[`VecDeque::try_reserve_exact`]: https://doc.rust-lang.org/std/collections/struct.VecDeque.html#method.try_reserve_exact +[`Iterator::map_while`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.map_while +[`iter::MapWhile`]: https://doc.rust-lang.org/std/iter/struct.MapWhile.html +[`proc_macro::is_available`]: https://doc.rust-lang.org/proc_macro/fn.is_available.html +[`Command::get_program`]: https://doc.rust-lang.org/std/process/struct.Command.html#method.get_program +[`Command::get_args`]: https://doc.rust-lang.org/std/process/struct.Command.html#method.get_args +[`Command::get_envs`]: https://doc.rust-lang.org/std/process/struct.Command.html#method.get_envs +[`Command::get_current_dir`]: https://doc.rust-lang.org/std/process/struct.Command.html#method.get_current_dir +[`CommandArgs`]: https://doc.rust-lang.org/std/process/struct.CommandArgs.html +[`CommandEnvs`]: https://doc.rust-lang.org/std/process/struct.CommandEnvs.html + Version 1.56.1 (2021-11-01) ===========================