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| -rw-r--r-- | RELEASES.md | 126 |
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diff --git a/RELEASES.md b/RELEASES.md index 83c44774da2..d2d92512d44 100644 --- a/RELEASES.md +++ b/RELEASES.md @@ -1,3 +1,129 @@ +Version 1.33.0 (2019-02-28) +========================== + +Language +-------- +- [You can now use the `cfg(target_vendor)` attribute.][57465] E.g. + `#[cfg(target_vendor="linux")] fn main() { println!("Hello Linux!"); }` +- [You can now have multiple patterns in `if let` and `while let` + expressions.][57532] You can do this with the same syntax as a `match` + expression. E.g. + ```rust + enum Creature { + Crab(String), + Person(String), + } + + fn main() { + let state = Creature::Crab("Ferrous"); + + if let Creature::Crab(name) | Creature::Person(name) { + println!("This creature's name is: {}", name); + } + } + ``` +- [You can now have irrefutable `if let` and `while let` patterns.][57535] Using + this feature will by default produce a warning as this behaviour can be + unintuitive. E.g. `if let _ = 5 {}` +- [You can now use `let` bindings and pattern destructurcting in + constant functions.][57175] +- [You can now specify multiple attributes in a `cfg_attr` attribute.][57332] + E.g. `#[cfg_attr(all(), must_use, optimize)]` +- [You can now specify a specific alignment with the `#[repr(packed)]` + attribute.][57049] E.g. `#[repr(packed(2))] struct Foo(i16, i32);` is a struct + with an alignment of 2 bytes and a size of 6 bytes. +- [You can now call unsafe constant functions.][57067] E.g. + ```rust + unsafe const fn foo() -> i32 { 5 } + const fn bar() -> i32 { + unsafe { foo() } + } + ``` +- [You can now import an item from a module as a `_`.][56303] This allows you to + import a trait's impls, and not have the name in the namespace. E.g. + ```rust + use std::io::Read as _; + + // Allowed as there is only one `Read` in the module. + pub trait Read {} + ``` +- [`extern` functions will now abort by default when panicking.][55982] + +Compiler +-------- +- [You can now set a linker flavor for `rustc` with the `-Clinker-flavor` + command line argument.][56351] +- [The mininum required LLVM version has been bumped to 6.0.][56642] +- [Added support for the PowerPC64 architecture on FreeBSD.][57615] +- [The `x86_64-fortanix-unknown-sgx` target support has been upgraded to + tier 2 support.][57130] Visit the [platform support] page for information on + Rust's platform support. +- [Added support for the `thumbv7neon-linux-androideabi` and + `thumbv7neon-unknown-linux-gnueabihf` targets.][56947] +- [Added support for the `x86_64-unknown-uefi` target.][56769] + +Libraries +--------- +- [The functions `overflowing_{add, sub, mul, shl, shr}` are now constant + functions for all numeric types.][57566] +- [The `get` method for all `NonZero` types is now constant.][57167] +- [The functions `count_ones`, `count_zeros`, `leading_zeros`, `trailing_zeros`, + `swap_bytes`, `from_be`, `from_le`, `to_be`, `to_le` are now constant for all + numeric types.][57234] +- [`Ipv4Addr::new` is now a constant function][57234] + +Stabilized APIs +--------------- +- [`unix::FileExt::read_exact_at`] +- [`unix::FileExt::write_exact_at`] +- [`Option::transpose`] +- [`Result::transpose`] +- [`convert::identity`] +- [`pin::Pin`] +- [`Vec::resize_with`] +- [`VecDeque::resize_with`] +- [`Duration::as_millis`] +- [`Duration::as_micros`] +- [`Duration::as_nanos`] + +Cargo +----- +- [Cargo should now rebuild a crate if a file was modified during the initial + build.][cargo/6484] + + +[57615]: https://github.com/rust-lang/rust/pull/57615/ +[57465]: https://github.com/rust-lang/rust/pull/57465/ +[57532]: https://github.com/rust-lang/rust/pull/57532/ +[57535]: https://github.com/rust-lang/rust/pull/57535/ +[57566]: https://github.com/rust-lang/rust/pull/57566/ +[57130]: https://github.com/rust-lang/rust/pull/57130/ +[57167]: https://github.com/rust-lang/rust/pull/57167/ +[57175]: https://github.com/rust-lang/rust/pull/57175/ +[57234]: https://github.com/rust-lang/rust/pull/57234/ +[57332]: https://github.com/rust-lang/rust/pull/57332/ +[56947]: https://github.com/rust-lang/rust/pull/56947/ +[57049]: https://github.com/rust-lang/rust/pull/57049/ +[57067]: https://github.com/rust-lang/rust/pull/57067/ +[56769]: https://github.com/rust-lang/rust/pull/56769/ +[56642]: https://github.com/rust-lang/rust/pull/56642/ +[56303]: https://github.com/rust-lang/rust/pull/56303/ +[56351]: https://github.com/rust-lang/rust/pull/56351/ +[55982]: https://github.com/rust-lang/rust/pull/55982/ +[cargo/6484]: https://github.com/rust-lang/cargo/pull/6484/ +[`unix::FileExt::read_exact_at`]: https://doc.rust-lang.org/std/os/unix/fs/trait.FileExt.html#read_exact_at +[`unix::FileExt::write_exact_at`]: https://doc.rust-lang.org/std/os/unix/fs/trait.FileExt.html#write_exact_at +[`Option::transpose`]: https://doc.rust-lang.org/std/option/enum.Option.html#transpose +[`Result::transpose`]: https://doc.rust-lang.org/std/result/enum.Result.html#transpose +[`convert::identity`]: https://doc.rust-lang.org/std/convert/fn.identity.html +[`pin::Pin`]: https://doc.rust-lang.org/std/pin/struct.Pin.html +[`Vec::resize_with`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#resize_with +[`VecDeque::resize_with`]: https://doc.rust-lang.org/std/collections/struct.VecDeque.html#resize_with +[`Duration::as_millis`]: https://doc.rust-lang.org/std/time/struct.Duration.html#as_millis +[`Duration::as_micros`]: https://doc.rust-lang.org/std/time/struct.Duration.html#as_micros +[`Duration::as_nanos`]: https://doc.rust-lang.org/std/time/struct.Duration.html#as_millis + + Version 1.32.0 (2019-01-17) ========================== |