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Updated releases notes for 1.18
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Aaron Power
Brian Anderson
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RELEASES.md
150
RELEASES.md
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Version 1.18.0 (2017-06-08)
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===========================
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Language
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--------
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- [Stabilize pub(restricted)][40556] `pub` can now accept a module path to
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make the item visible to just that module tree. Also accepts the keyword
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`crate` to make something public to the whole crate but not users of the
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library. Example: `pub(crate) mod utils;`. [RFC 1422].
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- [Stabilize `#![windows_subsystem]` attribute][40870] conservative exposure of the
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`/SUBSYSTEM` linker flag on Windows platforms. [RFC 1665].
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- [Refactor of trait object type parsing][40043] Now `ty` in macros can accept
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types like `Write + Send`, trailing `+` are now supported in trait objects,
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and better error reporting for trait objects starting with `?Sized`.
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- [0e+10 is now a valid floating point literal][40589]
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- [Now warns if you bind a lifetime parameter to 'static][40734]
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- [Tuples, Enum variant fields, and structs with no `repr` attribute or with
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`#[repr(Rust)]` are reordered to minimize padding and produce a smaller
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representation in some cases.][40377]
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Compiler
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--------
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- [rustc can now emit mir with `--emit mir`][39891]
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- [Improved LLVM IR for trivial functions][40367]
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- [Added explanation for E0090(Wrong number of lifetimes are supplied)][40723]
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- [rustc compilation is now 15%-20% faster][41469] Thanks to optimisation
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opportunities found through profiling
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- [Improved backtrace formatting when panicking][38165]
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Libraries
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---------
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- [Specialized `Vec::from_iter` being passed `vec::IntoIter`][40731] if the
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iterator hasn't been advanced the original `Vec` is reassembled with no actual
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iteration or reallocation.
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- [Simplified HashMap Bucket interface][40561] provides performance
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improvements for iterating and cloning.
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- [Specialize Vec::from_elem to use calloc][40409]
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- [Fixed Race condition in fs::create_dir_all][39799]
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- [No longer caching stdio on Windows][40516]
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- [Optimized insertion sort in slice][40807] insertion sort in some cases
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2.50%~ faster and in one case now 12.50% faster.
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- [Optimized `AtomicBool::fetch_nand`][41143]
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Stabilized APIs
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---------------
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- [`Child::try_wait`]
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- [`HashMap::retain`]
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- [`HashSet::retain`]
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- [`PeekMut::pop`]
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- [`TcpStream::peek`]
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- [`UdpSocket::peek`]
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- [`UdpSocket::peek_from`]
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Cargo
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-----
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- [Added partial Pijul support][cargo/3842] Pijul is a version control system in Rust.
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You can now create new cargo projects with Pijul using `cargo new --vcs pijul`
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- [Now always emits build script warnings for crates that fail to build][cargo/3847]
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- [Added Android build support][cargo/3885]
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- [Added `--bins` and `--tests` flags][cargo/3901] now you can build all programs
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of a certain type, for example `cargo build --bins` will build all
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binaries.
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- [Added support for haiku][cargo/3952]
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Misc
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----
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- [rustdoc can now use pulldown-cmark with the `--enable-commonmark` flag][40338]
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- [Added rust-winbg script for better debugging on Windows][39983]
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- [Rust now uses the official cross compiler for NetBSD][40612]
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- [rustdoc now accepts `#` at the start of files][40828]
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- [Fixed jemalloc support for musl][41168]
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Compatibility Notes
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-------------------
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- [Changes to how the `0` flag works in format!][40241] Padding zeroes are now
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always placed after the sign if it exists and before the digits. With the `#`
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flag the zeroes are placed after the prefix and before the digits.
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- [Due to the struct field optimisation][40377], using `transmute` on structs
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that have no `repr` attribute or `#[repr(Rust)]` will no longer work. This has
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always been undefined behavior, but is now more likely to break in practice.
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- [The refactor of trait object type parsing][40043] fixed a bug where `+` was
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receiving the wrong priority parsing things like `&for<'a> Tr<'a> + Send` as
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`&(for<'a> Tr<'a> + Send)` instead of `(&for<'a> Tr<'a>) + Send`
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- [Overlapping inherent `impl`s are now a hard error][40728]
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- [`PartialOrd` and `Ord` must agree on the ordering.][41270]
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- [`rustc main.rs -o out --emit=asm,llvm-ir`][41085] Now will output
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`out.asm` and `out.ll` instead of only one of the filetypes.
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- [ calling a function that returns `Self` will no longer work][41805] when
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the size of `Self` cannot be statically determined.
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- [rustc now builds with a "pthreads" flavour of MinGW for Windows GNU][40805]
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this has caused a few regressions namely:
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- Changed the link order of local static/dynamic libraries (respecting the
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order on given rather than having the compiler reorder).
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- Changed how MinGW is linked, native code linked to dynamic libraries
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may require manually linking to the gcc support library (for the native
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code itself)
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[38165]: https://github.com/rust-lang/rust/pull/38165
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[39799]: https://github.com/rust-lang/rust/pull/39799
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[39891]: https://github.com/rust-lang/rust/pull/39891
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[39983]: https://github.com/rust-lang/rust/pull/39983
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[40043]: https://github.com/rust-lang/rust/pull/40043
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[40241]: https://github.com/rust-lang/rust/pull/40241
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[40338]: https://github.com/rust-lang/rust/pull/40338
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[40367]: https://github.com/rust-lang/rust/pull/40367
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[40377]: https://github.com/rust-lang/rust/pull/40377
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[40409]: https://github.com/rust-lang/rust/pull/40409
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[40516]: https://github.com/rust-lang/rust/pull/40516
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[40556]: https://github.com/rust-lang/rust/pull/40556
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[40561]: https://github.com/rust-lang/rust/pull/40561
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[40589]: https://github.com/rust-lang/rust/pull/40589
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[40612]: https://github.com/rust-lang/rust/pull/40612
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[40723]: https://github.com/rust-lang/rust/pull/40723
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[40728]: https://github.com/rust-lang/rust/pull/40728
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[40731]: https://github.com/rust-lang/rust/pull/40731
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[40734]: https://github.com/rust-lang/rust/pull/40734
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[40805]: https://github.com/rust-lang/rust/pull/40805
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[40807]: https://github.com/rust-lang/rust/pull/40807
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[40828]: https://github.com/rust-lang/rust/pull/40828
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[40870]: https://github.com/rust-lang/rust/pull/40870
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[41085]: https://github.com/rust-lang/rust/pull/41085
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[41143]: https://github.com/rust-lang/rust/pull/41143
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[41168]: https://github.com/rust-lang/rust/pull/41168
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[41270]: https://github.com/rust-lang/rust/issues/41270
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[41469]: https://github.com/rust-lang/rust/pull/41469
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[41805]: https://github.com/rust-lang/rust/issues/41805
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[RFC 1422]: https://github.com/rust-lang/rfcs/blob/master/text/1422-pub-restricted.md
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[RFC 1665]: https://github.com/rust-lang/rfcs/blob/master/text/1665-windows-subsystem.md
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[`Child::try_wait`]: https://doc.rust-lang.org/std/process/struct.Child.html#method.try_wait
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[`HashMap::retain`]: https://doc.rust-lang.org/std/collections/struct.HashMap.html#method.retain
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[`HashSet::retain`]: https://doc.rust-lang.org/std/collections/struct.HashSet.html#method.retain
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[`PeekMut::pop`]: https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html#method.pop
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[`TcpStream::peek`]: https://doc.rust-lang.org/std/net/struct.TcpStream.html#method.peek
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[`UdpSocket::peek_from`]: https://doc.rust-lang.org/std/net/struct.UdpSocket.html#method.peek_from
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[`UdpSocket::peek`]: https://doc.rust-lang.org/std/net/struct.UdpSocket.html#method.peek
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[cargo/3842]: https://github.com/rust-lang/cargo/pull/3842
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[cargo/3847]: https://github.com/rust-lang/cargo/pull/3847
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[cargo/3885]: https://github.com/rust-lang/cargo/pull/3885
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[cargo/3901]: https://github.com/rust-lang/cargo/pull/3901
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[cargo/3952]: https://github.com/rust-lang/cargo/pull/3952
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Version 1.17.0 (2017-04-27)
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Version 1.17.0 (2017-04-27)
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===========================
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===========================
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