diff --git a/RELEASES.md b/RELEASES.md index 8ea481f7e18cd..7cba27e134a78 100644 --- a/RELEASES.md +++ b/RELEASES.md @@ -1,3 +1,163 @@ +Version 1.44.0 (2020-06-04) +========================== + +Language +-------- +- [You can now use `async/.await` with `#[no_std]` enabled.][69033] +- [Added the `unused_braces` lint.][70081] + +**Syntax-only changes** + +- [Expansion-driven outline module parsing][69838] +```rust +#[cfg(FALSE)] +mod foo { + mod bar { + mod baz; // `foo/bar/baz.rs` doesn't exist, but no error! + } +} +``` + +These are still rejected semantically, so you will likely receive an error but +these changes can be seen and parsed by macros and conditional compilation. + +Compiler +-------- +- [Rustc now respects the `-C codegen-units` flag in incremental mode.][70156] + Additionally when in incremental mode rustc defaults to 256 codegen units. +- [Refactored `catch_unwind`, to have zero-cost unless unwinding is enabled and + a panic is thrown.][67502] +- [Added tier 3\* support for the `aarch64-unknown-none` and + `aarch64-unknown-none-softfloat` targets.][68334] +- [Added tier 3 support for `arm64-apple-tvos` and + `x86_64-apple-tvos` targets.][68191] + + +Libraries +--------- +- [Special cased `vec![]` to map directly to `Vec::new()`.][70632] This allows + `vec![]` to be able to be used in `const` contexts. +- [`convert::Infallible` now implements `Hash`.][70281] +- [`OsString` now implements `DerefMut` and `IndexMut` returning + a `&mut OsStr`.][70048] +- [Unicode 13 is now supported.][69929] +- [`String` now implements `From<&mut str>`.][69661] +- [`IoSlice` now implements `Copy`.][69403] +- [`Vec` now implements `From<[T; N]>`.][68692] Where `N` is less than 32. +- [`proc_macro::LexError` now implements `fmt::Display` and `Error`.][68899] +- [`from_le_bytes`, `to_le_bytes`, `from_be_bytes`, `to_be_bytes`, + `from_ne_bytes`, and `to_ne_bytes` methods are now `const` for all + integer types.][69373] + +Stabilized APIs +--------------- +- [`PathBuf::with_capacity`] +- [`PathBuf::capacity`] +- [`PathBuf::clear`] +- [`PathBuf::reserve`] +- [`PathBuf::reserve_exact`] +- [`PathBuf::shrink_to_fit`] +- [`f32::to_int_unchecked`] +- [`f64::to_int_unchecked`] +- [`Layout::align_to`] +- [`Layout::pad_to_align`] +- [`Layout::array`] +- [`Layout::extend`] + +Cargo +----- +- [Added the `cargo tree` command which will print a tree graph of + your dependencies.][cargo/8062] E.g. + ``` + mdbook v0.3.2 (/Users/src/rust/mdbook) + ├── ammonia v3.0.0 + │ ├── html5ever v0.24.0 + │ │ ├── log v0.4.8 + │ │ │ └── cfg-if v0.1.9 + │ │ ├── mac v0.1.1 + │ │ └── markup5ever v0.9.0 + │ │ ├── log v0.4.8 (*) + │ │ ├── phf v0.7.24 + │ │ │ └── phf_shared v0.7.24 + │ │ │ ├── siphasher v0.2.3 + │ │ │ └── unicase v1.4.2 + │ │ │ [build-dependencies] + │ │ │ └── version_check v0.1.5 + ... + ``` + +Misc +---- +- [Rustdoc now allows you to specify `--crate-version` to have rustdoc include + the version in the sidebar.][69494] + +Compatibility Notes +------------------- +- [Rustc now correctly generates static libraries on Windows GNU targets with + the `.a` extension, rather than the previous `.lib`.][70937] +- [Removed the `-C no_integrated_as` flag from rustc.][70345] +- [The `file_name` property in JSON output of macro errors now points the actual + source file rather than the previous format of ``.][70969] + **Note:** this may not point a file that actually exists on the user's system. +- [The minimum required external LLVM version has been bumped to LLVM 8.][71147] +- [`mem::{zeroed, uninitialised, MaybeUninit}` will now panic when used with types + that do not allow zero initialization such as `NonZeroU8`.][66059] This was + previously a warning. +- [In 1.45.0 (the next release) converting a `f64` to `u32` using the `as` + operator has been defined as a saturating operation.][71269] This was previously + undefined behaviour, you can use the `{f64, f32}::to_int_unchecked` methods to + continue using the current behaviour which may desirable in rare performance + sensitive situations. + +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. + +- [dep_graph Avoid allocating a set on when the number reads are small.][69778] +- [Replace big JS dict with JSON parsing.][71250] + +[69373]: https://github.com/rust-lang/rust/pull/69373/ +[66059]: https://github.com/rust-lang/rust/pull/66059/ +[68191]: https://github.com/rust-lang/rust/pull/68191/ +[68899]: https://github.com/rust-lang/rust/pull/68899/ +[71147]: https://github.com/rust-lang/rust/pull/71147/ +[71250]: https://github.com/rust-lang/rust/pull/71250/ +[70937]: https://github.com/rust-lang/rust/pull/70937/ +[70969]: https://github.com/rust-lang/rust/pull/70969/ +[70632]: https://github.com/rust-lang/rust/pull/70632/ +[70281]: https://github.com/rust-lang/rust/pull/70281/ +[70345]: https://github.com/rust-lang/rust/pull/70345/ +[70048]: https://github.com/rust-lang/rust/pull/70048/ +[70081]: https://github.com/rust-lang/rust/pull/70081/ +[70156]: https://github.com/rust-lang/rust/pull/70156/ +[71269]: https://github.com/rust-lang/rust/pull/71269/ +[69838]: https://github.com/rust-lang/rust/pull/69838/ +[69929]: https://github.com/rust-lang/rust/pull/69929/ +[69661]: https://github.com/rust-lang/rust/pull/69661/ +[69778]: https://github.com/rust-lang/rust/pull/69778/ +[69494]: https://github.com/rust-lang/rust/pull/69494/ +[69403]: https://github.com/rust-lang/rust/pull/69403/ +[69033]: https://github.com/rust-lang/rust/pull/69033/ +[68692]: https://github.com/rust-lang/rust/pull/68692/ +[68334]: https://github.com/rust-lang/rust/pull/68334/ +[67502]: https://github.com/rust-lang/rust/pull/67502/ +[cargo/8062]: https://github.com/rust-lang/cargo/pull/8062/ +[`PathBuf::with_capacity`]: https://doc.rust-lang.org/std/path/struct.PathBuf.html#method.with_capacity +[`PathBuf::capacity`]: https://doc.rust-lang.org/std/path/struct.PathBuf.html#method.capacity +[`PathBuf::clear`]: https://doc.rust-lang.org/std/path/struct.PathBuf.html#method.clear +[`PathBuf::reserve`]: https://doc.rust-lang.org/std/path/struct.PathBuf.html#method.reserve +[`PathBuf::reserve_exact`]: https://doc.rust-lang.org/std/path/struct.PathBuf.html#method.reserve_exact +[`PathBuf::shrink_to_fit`]: https://doc.rust-lang.org/std/path/struct.PathBuf.html#method.shrink_to_fit +[`f32::to_int_unchecked`]: https://doc.rust-lang.org/std/primitive.f32.html#method.to_int_unchecked +[`f64::to_int_unchecked`]: https://doc.rust-lang.org/std/primitive.f64.html#method.to_int_unchecked +[`Layout::align_to`]: https://doc.rust-lang.org/std/alloc/struct.Layout.html#method.align_to +[`Layout::pad_to_align`]: https://doc.rust-lang.org/std/alloc/struct.Layout.html#method.pad_to_align +[`Layout::array`]: https://doc.rust-lang.org/std/alloc/struct.Layout.html#method.array +[`Layout::extend`]: https://doc.rust-lang.org/std/alloc/struct.Layout.html#method.extend + + Version 1.43.1 (2020-05-07) ===========================