X-Git-Url: https://git.lizzy.rs/?a=blobdiff_plain;f=RELEASES.md;h=8f04980e390367dcf5bb9c187f710a00ead0d819;hb=907ba75eb0b063c1da72703642e5710b91868dc8;hp=9fd796fd775bf995f9d8a624704a36f1bbbabe7d;hpb=d3eb49baa9bf836997dccaf3c9aae41dd0a55e8e;p=rust.git diff --git a/RELEASES.md b/RELEASES.md index 9fd796fd775..8f04980e390 100644 --- a/RELEASES.md +++ b/RELEASES.md @@ -1,3 +1,131 @@ +Version 1.49.0 (2020-12-31) +============================ + +Language +----------------------- + +- [Unions can now implement `Drop`, and you can now have a field in a union + with `ManuallyDrop`.][77547] +- [You can now cast uninhabited enums to integers.][76199] +- [You can now bind by reference and by move in patterns.][76119] This + allows you to selectively borrow individual components of a type. E.g. + ```rust + #[derive(Debug)] + struct Person { + name: String, + age: u8, + } + + let person = Person { + name: String::from("Alice"), + age: 20, + }; + + // `name` is moved out of person, but `age` is referenced. + let Person { name, ref age } = person; + println!("{} {}", name, age); + ``` + +Compiler +----------------------- + +- [Added tier 1\* support for `aarch64-unknown-linux-gnu`.][78228] +- [Added tier 2 support for `aarch64-apple-darwin`.][75991] +- [Added tier 2 support for `aarch64-pc-windows-msvc`.][75914] +- [Added tier 3 support for `mipsel-unknown-none`.][78676] +- [Raised the minimum supported LLVM version to LLVM 9.][78848] +- [Output from threads spawned in tests is now captured.][78227] +- [Change os and vendor values to "none" and "unknown" for some targets][78951] + +\* Refer to Rust's [platform support page][forge-platform-support] for more +information on Rust's tiered platform support. + +Libraries +----------------------- + +- [`RangeInclusive` now checks for exhaustion when calling `contains` and indexing.][78109] +- [`ToString::to_string` now no longer shrinks the internal buffer in the default implementation.][77997] +- [`ops::{Index, IndexMut}` are now implemented for fixed sized arrays of any length.][74989] + +Stabilized APIs +--------------- + +- [`slice::select_nth_unstable`] +- [`slice::select_nth_unstable_by`] +- [`slice::select_nth_unstable_by_key`] + +The following previously stable methods are now `const`. + +- [`Poll::is_ready`] +- [`Poll::is_pending`] + +Cargo +----------------------- +- [Building a crate with `cargo-package` should now be independently reproducible.][cargo/8864] +- [`cargo-tree` now marks proc-macro crates.][cargo/8765] +- [Added `CARGO_PRIMARY_PACKAGE` build-time environment variable.][cargo/8758] This + variable will be set if the crate being built is one the user selected to build, either + with `-p` or through defaults. +- [You can now use glob patterns when specifying packages & targets.][cargo/8752] + + +Compatibility Notes +------------------- + +- [Demoted `i686-unknown-freebsd` from host tier 2 to target tier 2 support.][78746] +- [Macros that end with a semi-colon are now treated as statements even if they expand to nothing.][78376] +- [Rustc will now check for the validity of some built-in attributes on enum variants.][77015] + Previously such invalid or unused attributes could be ignored. +- Leading whitespace is stripped more uniformly in documentation comments, which may change behavior. You + read [this post about the changes][rustdoc-ws-post] for more details. +- [Trait bounds are no longer inferred for associated types.][79904] + +Internal Only +------------- +These changes provide no direct user facing benefits, but represent significant +improvements to the internals and overall performance of rustc and +related tools. + +- [rustc's internal crates are now compiled using the `initial-exec` Thread + Local Storage model.][78201] +- [Calculate visibilities once in resolve.][78077] +- [Added `system` to the `llvm-libunwind` bootstrap config option.][77703] +- [Added `--color` for configuring terminal color support to bootstrap.][79004] + + +[75991]: https://github.com/rust-lang/rust/pull/75991 +[78951]: https://github.com/rust-lang/rust/pull/78951 +[78848]: https://github.com/rust-lang/rust/pull/78848 +[78746]: https://github.com/rust-lang/rust/pull/78746 +[78376]: https://github.com/rust-lang/rust/pull/78376 +[78228]: https://github.com/rust-lang/rust/pull/78228 +[78227]: https://github.com/rust-lang/rust/pull/78227 +[78201]: https://github.com/rust-lang/rust/pull/78201 +[78109]: https://github.com/rust-lang/rust/pull/78109 +[78077]: https://github.com/rust-lang/rust/pull/78077 +[77997]: https://github.com/rust-lang/rust/pull/77997 +[77703]: https://github.com/rust-lang/rust/pull/77703 +[77547]: https://github.com/rust-lang/rust/pull/77547 +[77015]: https://github.com/rust-lang/rust/pull/77015 +[76199]: https://github.com/rust-lang/rust/pull/76199 +[76119]: https://github.com/rust-lang/rust/pull/76119 +[75914]: https://github.com/rust-lang/rust/pull/75914 +[74989]: https://github.com/rust-lang/rust/pull/74989 +[79004]: https://github.com/rust-lang/rust/pull/79004 +[78676]: https://github.com/rust-lang/rust/pull/78676 +[79904]: https://github.com/rust-lang/rust/issues/79904 +[cargo/8864]: https://github.com/rust-lang/cargo/pull/8864 +[cargo/8765]: https://github.com/rust-lang/cargo/pull/8765 +[cargo/8758]: https://github.com/rust-lang/cargo/pull/8758 +[cargo/8752]: https://github.com/rust-lang/cargo/pull/8752 +[`slice::select_nth_unstable`]: https://doc.rust-lang.org/nightly/std/primitive.slice.html#method.select_nth_unstable +[`slice::select_nth_unstable_by`]: https://doc.rust-lang.org/nightly/std/primitive.slice.html#method.select_nth_unstable_by +[`slice::select_nth_unstable_by_key`]: https://doc.rust-lang.org/nightly/std/primitive.slice.html#method.select_nth_unstable_by_key +[`hint::spin_loop`]: https://doc.rust-lang.org/stable/std/hint/fn.spin_loop.html +[`Poll::is_ready`]: https://doc.rust-lang.org/stable/std/task/enum.Poll.html#method.is_ready +[`Poll::is_pending`]: https://doc.rust-lang.org/stable/std/task/enum.Poll.html#method.is_pending +[rustdoc-ws-post]: https://blog.guillaume-gomez.fr/articles/2020-11-11+New+doc+comment+handling+in+rustdoc + Version 1.48.0 (2020-11-19) ========================== @@ -10,7 +138,7 @@ Language Compiler -------- - [Stabilised the `-C link-self-contained=` compiler flag.][76158] This tells - `rustc` whether to link its own C runtime and libraries or to rely on a external + `rustc` whether to link its own C runtime and libraries or to rely on a external linker to find them. (Supported only on `windows-gnu`, `linux-musl`, and `wasi` platforms.) - [You can now use `-C target-feature=+crt-static` on `linux-gnu` targets.][77386] Note: If you're using cargo you must explicitly pass the `--target` flag. @@ -82,7 +210,7 @@ Compatibility Notes - [Foreign exceptions are now caught by `catch_unwind` and will cause an abort.][70212] Note: This behaviour is not guaranteed and is still considered undefined behaviour, see the [`catch_unwind`] documentation for further information. - + Internal Only @@ -102,7 +230,7 @@ related tools. [76030]: https://github.com/rust-lang/rust/pull/76030/ [70212]: https://github.com/rust-lang/rust/pull/70212/ [27675]: https://github.com/rust-lang/rust/issues/27675/ -[54121]: https://github.com/rust-lang/rust/issues/54121/ +[54121]: https://github.com/rust-lang/rust/issues/54121/ [71274]: https://github.com/rust-lang/rust/pull/71274/ [77386]: https://github.com/rust-lang/rust/pull/77386/ [77153]: https://github.com/rust-lang/rust/pull/77153/