diff options
| -rw-r--r-- | RELEASES.md | 69 |
1 files changed, 44 insertions, 25 deletions
diff --git a/RELEASES.md b/RELEASES.md index b4e4f2f3c66..659fa901a01 100644 --- a/RELEASES.md +++ b/RELEASES.md @@ -5,21 +5,25 @@ Language -------- - [You can now use the `cfg(target_vendor)` attribute.][57465] E.g. `#[cfg(target_vendor="linux")] fn main() { println!("Hello Linux!"); }` +- [Integer patterns such as in a match expression can now be exhaustive.][56362] + E.g. You can have match statement on a `u8` that covers `0..=255` and + you would no longer be required to have a `_ => unreachable!()` case. - [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), + Crab(String), + Lobster(String), + Person(String), } fn main() { - let state = Creature::Crab("Ferris"); + let state = Creature::Crab("Ferris"); - if let Creature::Crab(name) | Creature::Person(name) = state { - println!("This creature's name is: {}", name); - } + if let Creature::Crab(name) | Creature::Person(name) = state { + println!("This creature's name is: {}", name); + } } ``` - [You can now have irrefutable `if let` and `while let` patterns.][57535] Using @@ -27,18 +31,18 @@ Language unintuitive. E.g. `if let _ = 5 {}` - [You can now use `let` bindings, assignments, expression statements, and pattern destructuring in const 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. +- [You can now call unsafe const functions.][57067] E.g. ```rust const unsafe fn foo() -> i32 { 5 } const fn bar() -> i32 { unsafe { foo() } } ``` +- [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 import an item from a module as an `_`.][56303] This allows you to import a trait's impls, and not have the name in the namespace. E.g. ```rust @@ -64,13 +68,17 @@ Compiler Libraries --------- -- [The functions `overflowing_{add, sub, mul, shl, shr}` are now constant +- [The functions `overflowing_{add, sub, mul, shl, shr}` are now `const` functions for all numeric types.][57566] -- [The `get` method for all `NonZero` types is now constant.][57167] +- [The functions `rotate_left`, `rotate_right`, and `wrapping_{add, sub, mul, shl, shr}` + are now `const` functions for all numeric types.][57105] +- [The functions `is_positive` and `is_negative` are now `const` functions for + all signed numeric types.][57105] +- [The `get` method for all `NonZero` types is now `const`.][57167] - [The functions `count_ones`, `count_zeros`, `leading_zeros`, `trailing_zeros`, - `swap_bytes`, `from_be`, `from_le`, `to_be`, `to_le` are now const for all + `swap_bytes`, `from_be`, `from_le`, `to_be`, `to_le` are now `const` for all numeric types.][57234] -- [`Ipv4Addr::new` is now a const function][57234] +- [`Ipv4Addr::new` is now a `const` function][57234] Stabilized APIs --------------- @@ -80,17 +88,25 @@ Stabilized APIs - [`Result::transpose`] - [`convert::identity`] - [`pin::Pin`] +- [`marker::Unpin`] +- [`marker::PhantomPinned`] - [`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] +Compatibility Notes +------------------- +- The functions `str::{trim_left, trim_right, trim_left_matches, trim_right_matches}` + are now offically deprecated, and their usage will now produce a warning. Please use the + `str::{trim_start, trim_end, trim_start_matches, trim_end_matches}` functions instead. [57615]: https://github.com/rust-lang/rust/pull/57615/ [57465]: https://github.com/rust-lang/rust/pull/57465/ @@ -110,18 +126,21 @@ Cargo [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/ +[57105]: https://github.com/rust-lang/rust/pull/57105 [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 +[`unix::FileExt::read_exact_at`]: https://doc.rust-lang.org/std/os/unix/fs/trait.FileExt.html#method.read_exact_at +[`unix::FileExt::write_exact_at`]: https://doc.rust-lang.org/std/os/unix/fs/trait.FileExt.html#method.write_exact_at +[`Option::transpose`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.transpose +[`Result::transpose`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.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 +[`marker::Unpin`]: https://doc.rust-lang.org/stable/std/marker/trait.Unpin.html +[`marker::PhantomPinned`]: https://doc.rust-lang.org/nightly/std/marker/struct.PhantomPinned.html +[`Vec::resize_with`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.resize_with +[`VecDeque::resize_with`]: https://doc.rust-lang.org/std/collections/struct.VecDeque.html#method.resize_with +[`Duration::as_millis`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.as_millis +[`Duration::as_micros`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.as_micros +[`Duration::as_nanos`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.as_nanos [platform-support]: https://forge.rust-lang.org/platform-support.html Version 1.32.0 (2019-01-17) |