Unverified Commit 26215643 authored by Aaron Power's avatar Aaron Power Committed by GitHub

Update RELEASES.md

parent a4964500
......@@ -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)
......
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