1 Version 1.38.0 (2019-09-26)
2 ==========================
6 - [The `#[global_allocator]` attribute can now be used in submodules.][62735]
7 - [The `#[deprecated]` attribute can now be used on macros.][62042]
11 - [Added pipelined compilation support to `rustc`.][62766] This will
12 improve compilation times in some cases. For further information please refer
13 to the [_"Evaluating pipelined rustc compilation"_][pipeline-internals] thread.
14 - [Added tier 3\* support for the `aarch64-uwp-windows-msvc`, `i686-uwp-windows-gnu`,
15 `i686-uwp-windows-msvc`, `x86_64-uwp-windows-gnu`, and
16 `x86_64-uwp-windows-msvc` targets.][60260]
17 - [Added tier 3 support for the `armv7-unknown-linux-gnueabi` and
18 `armv7-unknown-linux-musleabi` targets.][63107]
19 - [Added tier 3 support for the `hexagon-unknown-linux-musl` target.][62814]
20 - [Added tier 3 support for the `riscv32i-unknown-none-elf` target.][62784]
22 \* Refer to Rust's [platform support page][forge-platform-support] for more
23 information on Rust's tiered platform support.
27 - [`ascii::EscapeDefault` now implements `Clone` and `Display`.][63421]
28 - [Derive macros for prelude traits (e.g. `Clone`, `Debug`, `Hash`) are now
29 available at the same path as the trait.][63056] (e.g. The `Clone` derive macro
30 is available at `std::clone::Clone`). This also makes all built-in macros
31 available in `std`/`core` root. e.g. `std::include_bytes!`.
32 - [`str::Chars` now implements `Debug`.][63000]
33 - [`slice::{concat, connect, join}` now accepts `&[T]` in addition to `&T`.][62528]
34 - [`*const T` and `*mut T` now implement `marker::Unpin`.][62583]
35 - [`Arc<[T]>` and `Rc<[T]>` now implement `FromIterator<T>`.][61953]
36 - [Added euclidean remainder and division operations (`div_euclid`,
37 `rem_euclid`) to all numeric primitives.][61884] Additionally `checked`,
38 `overflowing`, and `wrapping` versions are available for all
40 - [`thread::AccessError` now implements `Clone`, `Copy`, `Eq`, `Error`, and
42 - [`iter::{StepBy, Peekable, Take}` now implement `DoubleEndedIterator`.][61457]
46 - [`<*const T>::cast`]
48 - [`Duration::as_secs_f32`]
49 - [`Duration::as_secs_f64`]
50 - [`Duration::div_duration_f32`]
51 - [`Duration::div_duration_f64`]
52 - [`Duration::div_f32`]
53 - [`Duration::div_f64`]
54 - [`Duration::from_secs_f32`]
55 - [`Duration::from_secs_f64`]
56 - [`Duration::mul_f32`]
57 - [`Duration::mul_f64`]
62 - [Added pipelined compilation support to `cargo`.][cargo/7143]
63 - [You can now pass the `--features` option multiple times to enable
64 multiple features.][cargo/7084]
68 - [`rustc` will now warn about some incorrect uses of
69 `mem::{uninitialized, zeroed}` that are known to cause undefined behaviour.][63346]
71 [60260]: https://github.com/rust-lang/rust/pull/60260/
72 [61457]: https://github.com/rust-lang/rust/pull/61457/
73 [61491]: https://github.com/rust-lang/rust/pull/61491/
74 [61884]: https://github.com/rust-lang/rust/pull/61884/
75 [61953]: https://github.com/rust-lang/rust/pull/61953/
76 [62042]: https://github.com/rust-lang/rust/pull/62042/
77 [62528]: https://github.com/rust-lang/rust/pull/62528/
78 [62583]: https://github.com/rust-lang/rust/pull/62583/
79 [62735]: https://github.com/rust-lang/rust/pull/62735/
80 [62766]: https://github.com/rust-lang/rust/pull/62766/
81 [62784]: https://github.com/rust-lang/rust/pull/62784/
82 [62814]: https://github.com/rust-lang/rust/pull/62814/
83 [63000]: https://github.com/rust-lang/rust/pull/63000/
84 [63056]: https://github.com/rust-lang/rust/pull/63056/
85 [63107]: https://github.com/rust-lang/rust/pull/63107/
86 [63346]: https://github.com/rust-lang/rust/pull/63346/
87 [63421]: https://github.com/rust-lang/rust/pull/63421/
88 [cargo/7084]: https://github.com/rust-lang/cargo/pull/7084/
89 [cargo/7143]: https://github.com/rust-lang/cargo/pull/7143/
90 [`<*const T>::cast`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.cast
91 [`<*mut T>::cast`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.cast
92 [`Duration::as_secs_f32`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.as_secs_f32
93 [`Duration::as_secs_f64`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.as_secs_f64
94 [`Duration::div_duration_f32`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.div_duration_f32
95 [`Duration::div_duration_f64`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.div_duration_f64
96 [`Duration::div_f32`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.div_f32
97 [`Duration::div_f64`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.div_f64
98 [`Duration::from_secs_f32`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.from_secs_f32
99 [`Duration::from_secs_f64`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.from_secs_f64
100 [`Duration::mul_f32`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.mul_f32
101 [`Duration::mul_f64`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.mul_f64
102 [`any::type_name`]: https://doc.rust-lang.org/std/any/fn.type_name.html
103 [forge-platform-support]: https://forge.rust-lang.org/platform-support.html
104 [pipeline-internals]: https://internals.rust-lang.org/t/evaluating-pipelined-rustc-compilation/10199
106 Version 1.37.0 (2019-08-15)
107 ==========================
111 - `#[must_use]` will now warn if the type is contained in a [tuple][61100],
112 [`Box`][62228], or an [array][62235] and unused.
113 - [You can now use the `cfg` and `cfg_attr` attributes on
114 generic parameters.][61547]
115 - [You can now use enum variants through type alias.][61682] e.g. You can
118 type MyOption = Option<u8>;
120 fn increment_or_zero(x: MyOption) -> u8 {
122 MyOption::Some(y) => y + 1,
127 - [You can now use `_` as an identifier for consts.][61347] e.g. You can write
129 - [You can now use `#[repr(align(X)]` on enums.][61229]
130 - [The `?` Kleene macro operator is now available in the
131 2015 edition.][60932]
135 - [You can now enable Profile-Guided Optimization with the `-C profile-generate`
136 and `-C profile-use` flags.][61268] For more information on how to use profile
137 guided optimization, please refer to the [rustc book][rustc-book-pgo].
138 - [The `rust-lldb` wrapper script should now work again.][61827]
142 - [`mem::MaybeUninit<T>` is now ABI-compatible with `T`.][61802]
146 - [`BufReader::buffer`]
147 - [`BufWriter::buffer`]
149 - [`Cell<[T]>::as_slice_of_cells`][`Cell<slice>::as_slice_of_cells`]
150 - [`DoubleEndedIterator::nth_back`]
152 - [`Wrapping::reverse_bits`]
153 - [`i128::reverse_bits`]
154 - [`i16::reverse_bits`]
155 - [`i32::reverse_bits`]
156 - [`i64::reverse_bits`]
157 - [`i8::reverse_bits`]
158 - [`isize::reverse_bits`]
159 - [`slice::copy_within`]
160 - [`u128::reverse_bits`]
161 - [`u16::reverse_bits`]
162 - [`u32::reverse_bits`]
163 - [`u64::reverse_bits`]
164 - [`u8::reverse_bits`]
165 - [`usize::reverse_bits`]
169 - [`Cargo.lock` files are now included by default when publishing executable crates
170 with executables.][cargo/7026]
171 - [You can now specify `default-run="foo"` in `[package]` to specify the
172 default executable to use for `cargo run`.][cargo/7056]
179 - [Using `...` for inclusive range patterns will now warn by default.][61342]
180 Please transition your code to using the `..=` syntax for inclusive
182 - [Using a trait object without the `dyn` will now warn by default.][61203]
183 Please transition your code to use `dyn Trait` for trait objects instead.
185 [62228]: https://github.com/rust-lang/rust/pull/62228/
186 [62235]: https://github.com/rust-lang/rust/pull/62235/
187 [61802]: https://github.com/rust-lang/rust/pull/61802/
188 [61827]: https://github.com/rust-lang/rust/pull/61827/
189 [61547]: https://github.com/rust-lang/rust/pull/61547/
190 [61682]: https://github.com/rust-lang/rust/pull/61682/
191 [61268]: https://github.com/rust-lang/rust/pull/61268/
192 [61342]: https://github.com/rust-lang/rust/pull/61342/
193 [61347]: https://github.com/rust-lang/rust/pull/61347/
194 [61100]: https://github.com/rust-lang/rust/pull/61100/
195 [61203]: https://github.com/rust-lang/rust/pull/61203/
196 [61229]: https://github.com/rust-lang/rust/pull/61229/
197 [60932]: https://github.com/rust-lang/rust/pull/60932/
198 [cargo/7026]: https://github.com/rust-lang/cargo/pull/7026/
199 [cargo/7056]: https://github.com/rust-lang/cargo/pull/7056/
200 [`BufReader::buffer`]: https://doc.rust-lang.org/std/io/struct.BufReader.html#method.buffer
201 [`BufWriter::buffer`]: https://doc.rust-lang.org/std/io/struct.BufWriter.html#method.buffer
202 [`Cell::from_mut`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.from_mut
203 [`Cell<slice>::as_slice_of_cells`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.as_slice_of_cells
204 [`DoubleEndedIterator::nth_back`]: https://doc.rust-lang.org/std/iter/trait.DoubleEndedIterator.html#method.nth_back
205 [`Option::xor`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.xor
206 [`RefCell::try_borrow_unguarded`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow_unguarded
207 [`Wrapping::reverse_bits`]: https://doc.rust-lang.org/std/num/struct.Wrapping.html#method.reverse_bits
208 [`i128::reverse_bits`]: https://doc.rust-lang.org/std/primitive.i128.html#method.reverse_bits
209 [`i16::reverse_bits`]: https://doc.rust-lang.org/std/primitive.i16.html#method.reverse_bits
210 [`i32::reverse_bits`]: https://doc.rust-lang.org/std/primitive.i32.html#method.reverse_bits
211 [`i64::reverse_bits`]: https://doc.rust-lang.org/std/primitive.i64.html#method.reverse_bits
212 [`i8::reverse_bits`]: https://doc.rust-lang.org/std/primitive.i8.html#method.reverse_bits
213 [`isize::reverse_bits`]: https://doc.rust-lang.org/std/primitive.isize.html#method.reverse_bits
214 [`slice::copy_within`]: https://doc.rust-lang.org/std/primitive.slice.html#method.copy_within
215 [`u128::reverse_bits`]: https://doc.rust-lang.org/std/primitive.u128.html#method.reverse_bits
216 [`u16::reverse_bits`]: https://doc.rust-lang.org/std/primitive.u16.html#method.reverse_bits
217 [`u32::reverse_bits`]: https://doc.rust-lang.org/std/primitive.u32.html#method.reverse_bits
218 [`u64::reverse_bits`]: https://doc.rust-lang.org/std/primitive.u64.html#method.reverse_bits
219 [`u8::reverse_bits`]: https://doc.rust-lang.org/std/primitive.u8.html#method.reverse_bits
220 [`usize::reverse_bits`]: https://doc.rust-lang.org/std/primitive.usize.html#method.reverse_bits
221 [rustc-book-pgo]: https://doc.rust-lang.org/rustc/profile-guided-optimization.html
224 Version 1.36.0 (2019-07-04)
225 ==========================
229 - [Non-Lexical Lifetimes are now enabled on the 2015 edition.][59114]
230 - [The order of traits in trait objects no longer affects the semantics of that
231 object.][59445] e.g. `dyn Send + fmt::Debug` is now equivalent to
232 `dyn fmt::Debug + Send`, where this was previously not the case.
236 - [`HashMap`'s implementation has been replaced with `hashbrown::HashMap` implementation.][58623]
237 - [`TryFromSliceError` now implements `From<Infallible>`.][60318]
238 - [`mem::needs_drop` is now available as a const fn.][60364]
239 - [`alloc::Layout::from_size_align_unchecked` is now available as a const fn.][60370]
240 - [`String` now implements `BorrowMut<str>`.][60404]
241 - [`io::Cursor` now implements `Default`.][60234]
242 - [Both `NonNull::{dangling, cast}` are now const fns.][60244]
243 - [The `alloc` crate is now stable.][59675] `alloc` allows you to use a subset
244 of `std` (e.g. `Vec`, `Box`, `Arc`) in `#![no_std]` environments if the
245 environment has access to heap memory allocation.
246 - [`String` now implements `From<&String>`.][59825]
247 - [You can now pass multiple arguments to the `dbg!` macro.][59826] `dbg!` will
248 return a tuple of each argument when there is multiple arguments.
249 - [`Result::{is_err, is_ok}` are now `#[must_use]` and will produce a warning if
254 - [`VecDeque::rotate_left`]
255 - [`VecDeque::rotate_right`]
256 - [`Iterator::copied`]
259 - [`Read::read_vectored`]
260 - [`Write::write_vectored`]
261 - [`str::as_mut_ptr`]
262 - [`mem::MaybeUninit`]
263 - [`pointer::align_offset`]
267 - [`task::RawWakerVTable`]
273 - [Cargo will now produce an error if you attempt to use the name of a required dependency as a feature.][cargo/6860]
274 - [You can now pass the `--offline` flag to run cargo without accessing the network.][cargo/6934]
276 You can find further change's in [Cargo's 1.36.0 release notes][cargo-1-36-0].
280 There have been numerous additions and fixes to clippy, see [Clippy's 1.36.0 release notes][clippy-1-36-0] for more details.
287 - With the stabilisation of `mem::MaybeUninit`, `mem::uninitialized` use is no
288 longer recommended, and will be deprecated in 1.39.0.
290 [60318]: https://github.com/rust-lang/rust/pull/60318/
291 [60364]: https://github.com/rust-lang/rust/pull/60364/
292 [60370]: https://github.com/rust-lang/rust/pull/60370/
293 [60404]: https://github.com/rust-lang/rust/pull/60404/
294 [60234]: https://github.com/rust-lang/rust/pull/60234/
295 [60244]: https://github.com/rust-lang/rust/pull/60244/
296 [58623]: https://github.com/rust-lang/rust/pull/58623/
297 [59648]: https://github.com/rust-lang/rust/pull/59648/
298 [59675]: https://github.com/rust-lang/rust/pull/59675/
299 [59825]: https://github.com/rust-lang/rust/pull/59825/
300 [59826]: https://github.com/rust-lang/rust/pull/59826/
301 [59445]: https://github.com/rust-lang/rust/pull/59445/
302 [59114]: https://github.com/rust-lang/rust/pull/59114/
303 [cargo/6860]: https://github.com/rust-lang/cargo/pull/6860/
304 [cargo/6934]: https://github.com/rust-lang/cargo/pull/6934/
305 [`VecDeque::rotate_left`]: https://doc.rust-lang.org/std/collections/struct.VecDeque.html#method.rotate_left
306 [`VecDeque::rotate_right`]: https://doc.rust-lang.org/std/collections/struct.VecDeque.html#method.rotate_right
307 [`Iterator::copied`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#tymethod.copied
308 [`io::IoSlice`]: https://doc.rust-lang.org/std/io/struct.IoSlice.html
309 [`io::IoSliceMut`]: https://doc.rust-lang.org/std/io/struct.IoSliceMut.html
310 [`Read::read_vectored`]: https://doc.rust-lang.org/std/io/trait.Read.html#method.read_vectored
311 [`Write::write_vectored`]: https://doc.rust-lang.org/std/io/trait.Write.html#method.write_vectored
312 [`str::as_mut_ptr`]: https://doc.rust-lang.org/std/primitive.str.html#method.as_mut_ptr
313 [`mem::MaybeUninit`]: https://doc.rust-lang.org/std/mem/union.MaybeUninit.html
314 [`pointer::align_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.align_offset
315 [`future::Future`]: https://doc.rust-lang.org/std/future/trait.Future.html
316 [`task::Context`]: https://doc.rust-lang.org/beta/std/task/struct.Context.html
317 [`task::RawWaker`]: https://doc.rust-lang.org/beta/std/task/struct.RawWaker.html
318 [`task::RawWakerVTable`]: https://doc.rust-lang.org/beta/std/task/struct.RawWakerVTable.html
319 [`task::Waker`]: https://doc.rust-lang.org/beta/std/task/struct.Waker.html
320 [`task::Poll`]: https://doc.rust-lang.org/beta/std/task/enum.Poll.html
321 [clippy-1-36-0]: https://github.com/rust-lang/rust-clippy/blob/master/CHANGELOG.md#rust-136
322 [cargo-1-36-0]: https://github.com/rust-lang/cargo/blob/master/CHANGELOG.md#cargo-136-2019-07-04
325 Version 1.35.0 (2019-05-23)
326 ==========================
330 - [`FnOnce`, `FnMut`, and the `Fn` traits are now implemented for `Box<FnOnce>`,
331 `Box<FnMut>`, and `Box<Fn>` respectively.][59500]
332 - [You can now coerce closures into unsafe function pointers.][59580] e.g.
334 unsafe fn call_unsafe(func: unsafe fn()) {
339 unsafe { call_unsafe(|| {}); }
346 - [Added the `armv6-unknown-freebsd-gnueabihf` and
347 `armv7-unknown-freebsd-gnueabihf` targets.][58080]
348 - [Added the `wasm32-unknown-wasi` target.][59464]
353 - [`Thread` will now show its ID in `Debug` output.][59460]
354 - [`StdinLock`, `StdoutLock`, and `StderrLock` now implement `AsRawFd`.][59512]
355 - [`alloc::System` now implements `Default`.][59451]
356 - [Expanded `Debug` output (`{:#?}`) for structs now has a trailing comma on the
358 - [`char::{ToLowercase, ToUppercase}` now
359 implement `ExactSizeIterator`.][58778]
360 - [All `NonZero` numeric types now implement `FromStr`.][58717]
361 - [Removed the `Read` trait bounds
362 on the `BufReader::{get_ref, get_mut, into_inner}` methods.][58423]
363 - [You can now call the `dbg!` macro without any parameters to print the file
364 and line where it is called.][57847]
365 - [In place ASCII case conversions are now up to 4× faster.][59283]
366 e.g. `str::make_ascii_lowercase`
367 - [`hash_map::{OccupiedEntry, VacantEntry}` now implement `Sync`
374 - [`RefCell::replace_with`]
375 - [`RefCell::map_split`]
377 - [`Range::contains`]
378 - [`RangeFrom::contains`]
379 - [`RangeTo::contains`]
380 - [`RangeInclusive::contains`]
381 - [`RangeToInclusive::contains`]
386 - [You can now set `cargo:rustc-cdylib-link-arg` at build time to pass custom
387 linker arguments when building a `cdylib`.][cargo/6298] Its usage is highly
392 - [The Rust toolchain is now available natively for musl based distros.][58575]
394 [59460]: https://github.com/rust-lang/rust/pull/59460/
395 [59464]: https://github.com/rust-lang/rust/pull/59464/
396 [59500]: https://github.com/rust-lang/rust/pull/59500/
397 [59512]: https://github.com/rust-lang/rust/pull/59512/
398 [59580]: https://github.com/rust-lang/rust/pull/59580/
399 [59283]: https://github.com/rust-lang/rust/pull/59283/
400 [59451]: https://github.com/rust-lang/rust/pull/59451/
401 [59076]: https://github.com/rust-lang/rust/pull/59076/
402 [58778]: https://github.com/rust-lang/rust/pull/58778/
403 [58717]: https://github.com/rust-lang/rust/pull/58717/
404 [58369]: https://github.com/rust-lang/rust/pull/58369/
405 [58423]: https://github.com/rust-lang/rust/pull/58423/
406 [58080]: https://github.com/rust-lang/rust/pull/58080/
407 [57847]: https://github.com/rust-lang/rust/pull/57847/
408 [58575]: https://github.com/rust-lang/rust/pull/58575
409 [cargo/6298]: https://github.com/rust-lang/cargo/pull/6298/
410 [`f32::copysign`]: https://doc.rust-lang.org/stable/std/primitive.f32.html#method.copysign
411 [`f64::copysign`]: https://doc.rust-lang.org/stable/std/primitive.f64.html#method.copysign
412 [`RefCell::replace_with`]: https://doc.rust-lang.org/stable/std/cell/struct.RefCell.html#method.replace_with
413 [`RefCell::map_split`]: https://doc.rust-lang.org/stable/std/cell/struct.RefCell.html#method.map_split
414 [`ptr::hash`]: https://doc.rust-lang.org/stable/std/ptr/fn.hash.html
415 [`Range::contains`]: https://doc.rust-lang.org/std/ops/struct.Range.html#method.contains
416 [`RangeFrom::contains`]: https://doc.rust-lang.org/std/ops/struct.RangeFrom.html#method.contains
417 [`RangeTo::contains`]: https://doc.rust-lang.org/std/ops/struct.RangeTo.html#method.contains
418 [`RangeInclusive::contains`]: https://doc.rust-lang.org/std/ops/struct.RangeInclusive.html#method.contains
419 [`RangeToInclusive::contains`]: https://doc.rust-lang.org/std/ops/struct.RangeToInclusive.html#method.contains
420 [`Option::copied`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.copied
422 Version 1.34.2 (2019-05-14)
423 ===========================
425 * [Destabilize the `Error::type_id` function due to a security
426 vulnerability][60785] ([CVE-2019-12083])
428 [60785]: https://github.com/rust-lang/rust/pull/60785
429 [CVE-2019-12083]: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-12083
431 Version 1.34.1 (2019-04-25)
432 ===========================
434 * [Fix false positives for the `redundant_closure` Clippy lint][clippy/3821]
435 * [Fix false positives for the `missing_const_for_fn` Clippy lint][clippy/3844]
436 * [Fix Clippy panic when checking some macros][clippy/3805]
438 [clippy/3821]: https://github.com/rust-lang/rust-clippy/pull/3821
439 [clippy/3844]: https://github.com/rust-lang/rust-clippy/pull/3844
440 [clippy/3805]: https://github.com/rust-lang/rust-clippy/pull/3805
442 Version 1.34.0 (2019-04-11)
443 ==========================
447 - [You can now use `#[deprecated = "reason"]`][58166] as a shorthand for
448 `#[deprecated(note = "reason")]`. This was previously allowed by mistake
450 - [You can now accept token streams in `#[attr()]`,`#[attr[]]`, and
451 `#[attr{}]` procedural macros.][57367]
452 - [You can now write `extern crate self as foo;`][57407] to import your
453 crate's root into the extern prelude.
458 - [You can now target `riscv64imac-unknown-none-elf` and
459 `riscv64gc-unknown-none-elf`.][58406]
460 - [You can now enable linker plugin LTO optimisations with
461 `-C linker-plugin-lto`.][58057] This allows rustc to compile your Rust code
462 into LLVM bitcode allowing LLVM to perform LTO optimisations across C/C++ FFI
464 - [You can now target `powerpc64-unknown-freebsd`.][57809]
469 - [The trait bounds have been removed on some of `HashMap<K, V, S>`'s and
470 `HashSet<T, S>`'s basic methods.][58370] Most notably you no longer require
471 the `Hash` trait to create an iterator.
472 - [The `Ord` trait bounds have been removed on some of `BinaryHeap<T>`'s basic
473 methods.][58421] Most notably you no longer require the `Ord` trait to create
475 - [The methods `overflowing_neg` and `wrapping_neg` are now `const` functions
476 for all numeric types.][58044]
477 - [Indexing a `str` is now generic over all types that
478 implement `SliceIndex<str>`.][57604]
479 - [`str::trim`, `str::trim_matches`, `str::trim_{start, end}`, and
480 `str::trim_{start, end}_matches` are now `#[must_use]`][57106] and will
481 produce a warning if their returning type is unused.
482 - [The methods `checked_pow`, `saturating_pow`, `wrapping_pow`, and
483 `overflowing_pow` are now available for all numeric types.][57873] These are
484 equivalent to methods such as `wrapping_add` for the `pow` operation.
493 * [`atomic::AtomicI16`]
494 * [`atomic::AtomicI32`]
495 * [`atomic::AtomicI64`]
496 * [`atomic::AtomicI8`]
497 * [`atomic::AtomicU16`]
498 * [`atomic::AtomicU32`]
499 * [`atomic::AtomicU64`]
500 * [`atomic::AtomicU8`]
501 * [`convert::Infallible`]
502 * [`convert::TryFrom`]
503 * [`convert::TryInto`]
505 * [`iter::successors`]
506 * [`num::NonZeroI128`]
507 * [`num::NonZeroI16`]
508 * [`num::NonZeroI32`]
509 * [`num::NonZeroI64`]
511 * [`num::NonZeroIsize`]
512 * [`slice::sort_by_cached_key`]
513 * [`str::escape_debug`]
514 * [`str::escape_default`]
515 * [`str::escape_unicode`]
516 * [`str::split_ascii_whitespace`]
519 * [`Instant::checked_add`]
520 * [`Instant::checked_sub`]
521 * [`SystemTime::checked_add`]
522 * [`SystemTime::checked_sub`]
526 - [You can now use alternative registries to crates.io.][cargo/6654]
530 - [You can now use the `?` operator in your documentation tests without manually
531 adding `fn main() -> Result<(), _> {}`.][56470]
535 - [`Command::before_exec` is being replaced by the unsafe method
536 `Command::pre_exec`][58059] and will be deprecated with Rust 1.37.0.
537 - [Use of `ATOMIC_{BOOL, ISIZE, USIZE}_INIT` is now deprecated][57425] as you
538 can now use `const` functions in `static` variables.
540 [58370]: https://github.com/rust-lang/rust/pull/58370/
541 [58406]: https://github.com/rust-lang/rust/pull/58406/
542 [58421]: https://github.com/rust-lang/rust/pull/58421/
543 [58166]: https://github.com/rust-lang/rust/pull/58166/
544 [58044]: https://github.com/rust-lang/rust/pull/58044/
545 [58057]: https://github.com/rust-lang/rust/pull/58057/
546 [58059]: https://github.com/rust-lang/rust/pull/58059/
547 [57809]: https://github.com/rust-lang/rust/pull/57809/
548 [57873]: https://github.com/rust-lang/rust/pull/57873/
549 [57604]: https://github.com/rust-lang/rust/pull/57604/
550 [57367]: https://github.com/rust-lang/rust/pull/57367/
551 [57407]: https://github.com/rust-lang/rust/pull/57407/
552 [57425]: https://github.com/rust-lang/rust/pull/57425/
553 [57106]: https://github.com/rust-lang/rust/pull/57106/
554 [56470]: https://github.com/rust-lang/rust/pull/56470/
555 [cargo/6654]: https://github.com/rust-lang/cargo/pull/6654/
556 [`Any::type_id`]: https://doc.rust-lang.org/std/any/trait.Any.html#tymethod.type_id
557 [`Error::type_id`]: https://doc.rust-lang.org/std/error/trait.Error.html#method.type_id
558 [`atomic::AtomicI16`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicI16.html
559 [`atomic::AtomicI32`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicI32.html
560 [`atomic::AtomicI64`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicI64.html
561 [`atomic::AtomicI8`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicI8.html
562 [`atomic::AtomicU16`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU16.html
563 [`atomic::AtomicU32`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU32.html
564 [`atomic::AtomicU64`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU64.html
565 [`atomic::AtomicU8`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html
566 [`convert::Infallible`]: https://doc.rust-lang.org/std/convert/enum.Infallible.html
567 [`convert::TryFrom`]: https://doc.rust-lang.org/std/convert/trait.TryFrom.html
568 [`convert::TryInto`]: https://doc.rust-lang.org/std/convert/trait.TryInto.html
569 [`iter::from_fn`]: https://doc.rust-lang.org/std/iter/fn.from_fn.html
570 [`iter::successors`]: https://doc.rust-lang.org/std/iter/fn.successors.html
571 [`num::NonZeroI128`]: https://doc.rust-lang.org/std/num/struct.NonZeroI128.html
572 [`num::NonZeroI16`]: https://doc.rust-lang.org/std/num/struct.NonZeroI16.html
573 [`num::NonZeroI32`]: https://doc.rust-lang.org/std/num/struct.NonZeroI32.html
574 [`num::NonZeroI64`]: https://doc.rust-lang.org/std/num/struct.NonZeroI64.html
575 [`num::NonZeroI8`]: https://doc.rust-lang.org/std/num/struct.NonZeroI8.html
576 [`num::NonZeroIsize`]: https://doc.rust-lang.org/std/num/struct.NonZeroIsize.html
577 [`slice::sort_by_cached_key`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_by_cached_key
578 [`str::escape_debug`]: https://doc.rust-lang.org/std/primitive.str.html#method.escape_debug
579 [`str::escape_default`]: https://doc.rust-lang.org/std/primitive.str.html#method.escape_default
580 [`str::escape_unicode`]: https://doc.rust-lang.org/std/primitive.str.html#method.escape_unicode
581 [`str::split_ascii_whitespace`]: https://doc.rust-lang.org/std/primitive.str.html#method.split_ascii_whitespace
582 [`Instant::checked_add`]: https://doc.rust-lang.org/std/time/struct.Instant.html#method.checked_add
583 [`Instant::checked_sub`]: https://doc.rust-lang.org/std/time/struct.Instant.html#method.checked_sub
584 [`SystemTime::checked_add`]: https://doc.rust-lang.org/std/time/struct.SystemTime.html#method.checked_add
585 [`SystemTime::checked_sub`]: https://doc.rust-lang.org/std/time/struct.SystemTime.html#method.checked_sub
588 Version 1.33.0 (2019-02-28)
589 ==========================
593 - [You can now use the `cfg(target_vendor)` attribute.][57465] E.g.
594 `#[cfg(target_vendor="apple")] fn main() { println!("Hello Apple!"); }`
595 - [Integer patterns such as in a match expression can now be exhaustive.][56362]
596 E.g. You can have match statement on a `u8` that covers `0..=255` and
597 you would no longer be required to have a `_ => unreachable!()` case.
598 - [You can now have multiple patterns in `if let` and `while let`
599 expressions.][57532] You can do this with the same syntax as a `match`
609 let state = Creature::Crab("Ferris");
611 if let Creature::Crab(name) | Creature::Person(name) = state {
612 println!("This creature's name is: {}", name);
616 - [You can now have irrefutable `if let` and `while let` patterns.][57535] Using
617 this feature will by default produce a warning as this behaviour can be
618 unintuitive. E.g. `if let _ = 5 {}`
619 - [You can now use `let` bindings, assignments, expression statements,
620 and irrefutable pattern destructuring in const functions.][57175]
621 - [You can now call unsafe const functions.][57067] E.g.
623 const unsafe fn foo() -> i32 { 5 }
624 const fn bar() -> i32 {
628 - [You can now specify multiple attributes in a `cfg_attr` attribute.][57332]
629 E.g. `#[cfg_attr(all(), must_use, optimize)]`
630 - [You can now specify a specific alignment with the `#[repr(packed)]`
631 attribute.][57049] E.g. `#[repr(packed(2))] struct Foo(i16, i32);` is a struct
632 with an alignment of 2 bytes and a size of 6 bytes.
633 - [You can now import an item from a module as an `_`.][56303] This allows you to
634 import a trait's impls, and not have the name in the namespace. E.g.
636 use std::io::Read as _;
638 // Allowed as there is only one `Read` in the module.
641 - [You may now use `Rc`, `Arc`, and `Pin` as method receivers][56805].
645 - [You can now set a linker flavor for `rustc` with the `-Clinker-flavor`
646 command line argument.][56351]
647 - [The minimum required LLVM version has been bumped to 6.0.][56642]
648 - [Added support for the PowerPC64 architecture on FreeBSD.][57615]
649 - [The `x86_64-fortanix-unknown-sgx` target support has been upgraded to
650 tier 2 support.][57130] Visit the [platform support][platform-support] page for
651 information on Rust's platform support.
652 - [Added support for the `thumbv7neon-linux-androideabi` and
653 `thumbv7neon-unknown-linux-gnueabihf` targets.][56947]
654 - [Added support for the `x86_64-unknown-uefi` target.][56769]
658 - [The methods `overflowing_{add, sub, mul, shl, shr}` are now `const`
659 functions for all numeric types.][57566]
660 - [The methods `rotate_left`, `rotate_right`, and `wrapping_{add, sub, mul, shl, shr}`
661 are now `const` functions for all numeric types.][57105]
662 - [The methods `is_positive` and `is_negative` are now `const` functions for
663 all signed numeric types.][57105]
664 - [The `get` method for all `NonZero` types is now `const`.][57167]
665 - [The methods `count_ones`, `count_zeros`, `leading_zeros`, `trailing_zeros`,
666 `swap_bytes`, `from_be`, `from_le`, `to_be`, `to_le` are now `const` for all
667 numeric types.][57234]
668 - [`Ipv4Addr::new` is now a `const` function][57234]
672 - [`unix::FileExt::read_exact_at`]
673 - [`unix::FileExt::write_all_at`]
674 - [`Option::transpose`]
675 - [`Result::transpose`]
676 - [`convert::identity`]
679 - [`marker::PhantomPinned`]
680 - [`Vec::resize_with`]
681 - [`VecDeque::resize_with`]
682 - [`Duration::as_millis`]
683 - [`Duration::as_micros`]
684 - [`Duration::as_nanos`]
689 - [You can now publish crates that require a feature flag to compile with
690 `cargo publish --features` or `cargo publish --all-features`.][cargo/6453]
691 - [Cargo should now rebuild a crate if a file was modified during the initial
696 - The methods `str::{trim_left, trim_right, trim_left_matches, trim_right_matches}`
697 are now deprecated in the standard library, and their usage will now produce a warning.
698 Please use the `str::{trim_start, trim_end, trim_start_matches, trim_end_matches}`
700 - The `Error::cause` method has been deprecated in favor of `Error::source` which supports
702 - [Libtest no longer creates a new thread for each test when
703 `--test-threads=1`. It also runs the tests in deterministic order][56243]
705 [55982]: https://github.com/rust-lang/rust/pull/55982/
706 [56243]: https://github.com/rust-lang/rust/pull/56243
707 [56303]: https://github.com/rust-lang/rust/pull/56303/
708 [56351]: https://github.com/rust-lang/rust/pull/56351/
709 [56362]: https://github.com/rust-lang/rust/pull/56362
710 [56642]: https://github.com/rust-lang/rust/pull/56642/
711 [56769]: https://github.com/rust-lang/rust/pull/56769/
712 [56805]: https://github.com/rust-lang/rust/pull/56805
713 [56947]: https://github.com/rust-lang/rust/pull/56947/
714 [57049]: https://github.com/rust-lang/rust/pull/57049/
715 [57067]: https://github.com/rust-lang/rust/pull/57067/
716 [57105]: https://github.com/rust-lang/rust/pull/57105
717 [57130]: https://github.com/rust-lang/rust/pull/57130/
718 [57167]: https://github.com/rust-lang/rust/pull/57167/
719 [57175]: https://github.com/rust-lang/rust/pull/57175/
720 [57234]: https://github.com/rust-lang/rust/pull/57234/
721 [57332]: https://github.com/rust-lang/rust/pull/57332/
722 [57465]: https://github.com/rust-lang/rust/pull/57465/
723 [57532]: https://github.com/rust-lang/rust/pull/57532/
724 [57535]: https://github.com/rust-lang/rust/pull/57535/
725 [57566]: https://github.com/rust-lang/rust/pull/57566/
726 [57615]: https://github.com/rust-lang/rust/pull/57615/
727 [cargo/6453]: https://github.com/rust-lang/cargo/pull/6453/
728 [cargo/6484]: https://github.com/rust-lang/cargo/pull/6484/
729 [`unix::FileExt::read_exact_at`]: https://doc.rust-lang.org/std/os/unix/fs/trait.FileExt.html#method.read_exact_at
730 [`unix::FileExt::write_all_at`]: https://doc.rust-lang.org/std/os/unix/fs/trait.FileExt.html#method.write_all_at
731 [`Option::transpose`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.transpose
732 [`Result::transpose`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.transpose
733 [`convert::identity`]: https://doc.rust-lang.org/std/convert/fn.identity.html
734 [`pin::Pin`]: https://doc.rust-lang.org/std/pin/struct.Pin.html
735 [`marker::Unpin`]: https://doc.rust-lang.org/stable/std/marker/trait.Unpin.html
736 [`marker::PhantomPinned`]: https://doc.rust-lang.org/nightly/std/marker/struct.PhantomPinned.html
737 [`Vec::resize_with`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.resize_with
738 [`VecDeque::resize_with`]: https://doc.rust-lang.org/std/collections/struct.VecDeque.html#method.resize_with
739 [`Duration::as_millis`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.as_millis
740 [`Duration::as_micros`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.as_micros
741 [`Duration::as_nanos`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.as_nanos
742 [platform-support]: https://forge.rust-lang.org/platform-support.html
744 Version 1.32.0 (2019-01-17)
745 ==========================
750 - [You can now use the `?` operator in macro definitions.][56245] The `?`
751 operator allows you to specify zero or one repetitions similar to the `*` and
753 - [Module paths with no leading keyword like `super`, `self`, or `crate`, will
754 now always resolve to the item (`enum`, `struct`, etc.) available in the
755 module if present, before resolving to a external crate or an item the prelude.][56759]
758 enum Color { Red, Green, Blue }
764 - [You can now match against `PhantomData<T>` types.][55837]
765 - [You can now match against literals in macros with the `literal`
766 specifier.][56072] This will match against a literal of any type.
767 E.g. `1`, `'A'`, `"Hello World"`
768 - [Self can now be used as a constructor and pattern for unit and tuple structs.][56365] E.g.
770 struct Point(i32, i32);
773 pub fn new(x: i32, y: i32) -> Self {
777 pub fn is_origin(&self) -> bool {
785 - [Self can also now be used in type definitions.][56366] E.g.
789 Self: PartialOrd<Self> // can write `Self` instead of `List<T>`
792 Cons(T, Box<Self>) // likewise here
795 - [You can now mark traits with `#[must_use]`.][55663] This provides a warning if
796 a `impl Trait` or `dyn Trait` is returned and unused in the program.
800 - [The default allocator has changed from jemalloc to the default allocator on
801 your system.][55238] The compiler itself on Linux & macOS will still use
802 jemalloc, but programs compiled with it will use the system allocator.
803 - [Added the `aarch64-pc-windows-msvc` target.][55702]
807 - [`PathBuf` now implements `FromStr`.][55148]
808 - [`Box<[T]>` now implements `FromIterator<T>`.][55843]
809 - [The `dbg!` macro has been stabilized.][56395] This macro enables you to
810 easily debug expressions in your rust program. E.g.
813 let b = dbg!(a * 2) + 1;
814 // ^-- prints: [src/main.rs:4] a * 2 = 4
818 The following APIs are now `const` functions and can be used in a
822 - [`UnsafeCell::get`]
825 - [`ManuallyDrop::new`]
826 - [`ManuallyDrop::into_inner`]
827 - [`RangeInclusive::start`]
828 - [`RangeInclusive::end`]
829 - [`NonNull::as_ptr`]
832 - [`Duration::as_secs`]
833 - [`Duration::subsec_millis`]
834 - [`Duration::subsec_micros`]
835 - [`Duration::subsec_nanos`]
837 - [`Ipv4Addr::is_unspecified`]
839 - [`Ipv6Addr::octets`]
843 - [`i8::to_be_bytes`]
844 - [`i8::to_le_bytes`]
845 - [`i8::to_ne_bytes`]
846 - [`i8::from_be_bytes`]
847 - [`i8::from_le_bytes`]
848 - [`i8::from_ne_bytes`]
849 - [`i16::to_be_bytes`]
850 - [`i16::to_le_bytes`]
851 - [`i16::to_ne_bytes`]
852 - [`i16::from_be_bytes`]
853 - [`i16::from_le_bytes`]
854 - [`i16::from_ne_bytes`]
855 - [`i32::to_be_bytes`]
856 - [`i32::to_le_bytes`]
857 - [`i32::to_ne_bytes`]
858 - [`i32::from_be_bytes`]
859 - [`i32::from_le_bytes`]
860 - [`i32::from_ne_bytes`]
861 - [`i64::to_be_bytes`]
862 - [`i64::to_le_bytes`]
863 - [`i64::to_ne_bytes`]
864 - [`i64::from_be_bytes`]
865 - [`i64::from_le_bytes`]
866 - [`i64::from_ne_bytes`]
867 - [`i128::to_be_bytes`]
868 - [`i128::to_le_bytes`]
869 - [`i128::to_ne_bytes`]
870 - [`i128::from_be_bytes`]
871 - [`i128::from_le_bytes`]
872 - [`i128::from_ne_bytes`]
873 - [`isize::to_be_bytes`]
874 - [`isize::to_le_bytes`]
875 - [`isize::to_ne_bytes`]
876 - [`isize::from_be_bytes`]
877 - [`isize::from_le_bytes`]
878 - [`isize::from_ne_bytes`]
879 - [`u8::to_be_bytes`]
880 - [`u8::to_le_bytes`]
881 - [`u8::to_ne_bytes`]
882 - [`u8::from_be_bytes`]
883 - [`u8::from_le_bytes`]
884 - [`u8::from_ne_bytes`]
885 - [`u16::to_be_bytes`]
886 - [`u16::to_le_bytes`]
887 - [`u16::to_ne_bytes`]
888 - [`u16::from_be_bytes`]
889 - [`u16::from_le_bytes`]
890 - [`u16::from_ne_bytes`]
891 - [`u32::to_be_bytes`]
892 - [`u32::to_le_bytes`]
893 - [`u32::to_ne_bytes`]
894 - [`u32::from_be_bytes`]
895 - [`u32::from_le_bytes`]
896 - [`u32::from_ne_bytes`]
897 - [`u64::to_be_bytes`]
898 - [`u64::to_le_bytes`]
899 - [`u64::to_ne_bytes`]
900 - [`u64::from_be_bytes`]
901 - [`u64::from_le_bytes`]
902 - [`u64::from_ne_bytes`]
903 - [`u128::to_be_bytes`]
904 - [`u128::to_le_bytes`]
905 - [`u128::to_ne_bytes`]
906 - [`u128::from_be_bytes`]
907 - [`u128::from_le_bytes`]
908 - [`u128::from_ne_bytes`]
909 - [`usize::to_be_bytes`]
910 - [`usize::to_le_bytes`]
911 - [`usize::to_ne_bytes`]
912 - [`usize::from_be_bytes`]
913 - [`usize::from_le_bytes`]
914 - [`usize::from_ne_bytes`]
918 - [You can now run `cargo c` as an alias for `cargo check`.][cargo/6218]
919 - [Usernames are now allowed in alt registry URLs.][cargo/6242]
923 - [`libproc_macro` has been added to the `rust-src` distribution.][55280]
927 - [The argument types for AVX's
928 `_mm256_stream_si256`, `_mm256_stream_pd`, `_mm256_stream_ps`][55610] have
929 been changed from `*const` to `*mut` as the previous implementation
933 [55148]: https://github.com/rust-lang/rust/pull/55148/
934 [55238]: https://github.com/rust-lang/rust/pull/55238/
935 [55280]: https://github.com/rust-lang/rust/pull/55280/
936 [55610]: https://github.com/rust-lang/rust/pull/55610/
937 [55663]: https://github.com/rust-lang/rust/pull/55663/
938 [55702]: https://github.com/rust-lang/rust/pull/55702/
939 [55837]: https://github.com/rust-lang/rust/pull/55837/
940 [55843]: https://github.com/rust-lang/rust/pull/55843/
941 [56072]: https://github.com/rust-lang/rust/pull/56072/
942 [56245]: https://github.com/rust-lang/rust/pull/56245/
943 [56365]: https://github.com/rust-lang/rust/pull/56365/
944 [56366]: https://github.com/rust-lang/rust/pull/56366/
945 [56395]: https://github.com/rust-lang/rust/pull/56395/
946 [56759]: https://github.com/rust-lang/rust/pull/56759/
947 [cargo/6218]: https://github.com/rust-lang/cargo/pull/6218/
948 [cargo/6242]: https://github.com/rust-lang/cargo/pull/6242/
949 [`CStr::as_ptr`]: https://doc.rust-lang.org/std/ffi/struct.CStr.html#method.as_ptr
950 [`Cell::as_ptr`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.as_ptr
951 [`Duration::as_secs`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.as_secs
952 [`Duration::subsec_micros`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.subsec_micros
953 [`Duration::subsec_millis`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.subsec_millis
954 [`Duration::subsec_nanos`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.subsec_nanos
955 [`Ipv4Addr::is_unspecified`]: https://doc.rust-lang.org/std/net/struct.Ipv4Addr.html#method.is_unspecified
956 [`Ipv6Addr::new`]: https://doc.rust-lang.org/std/net/struct.Ipv6Addr.html#method.new
957 [`Ipv6Addr::octets`]: https://doc.rust-lang.org/std/net/struct.Ipv6Addr.html#method.octets
958 [`ManuallyDrop::into_inner`]: https://doc.rust-lang.org/std/mem/struct.ManuallyDrop.html#method.into_inner
959 [`ManuallyDrop::new`]: https://doc.rust-lang.org/std/mem/struct.ManuallyDrop.html#method.new
960 [`NonNull::as_ptr`]: https://doc.rust-lang.org/std/ptr/struct.NonNull.html#method.as_ptr
961 [`RangeInclusive::end`]: https://doc.rust-lang.org/std/ops/struct.RangeInclusive.html#method.end
962 [`RangeInclusive::start`]: https://doc.rust-lang.org/std/ops/struct.RangeInclusive.html#method.start
963 [`UnsafeCell::get`]: https://doc.rust-lang.org/std/cell/struct.UnsafeCell.html#method.get
964 [`slice::as_ptr`]: https://doc.rust-lang.org/std/primitive.slice.html#method.as_ptr
965 [`char::is_ascii`]: https://doc.rust-lang.org/std/primitive.char.html#method.is_ascii
966 [`i128::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i128.html#method.from_be_bytes
967 [`i128::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i128.html#method.from_le_bytes
968 [`i128::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i128.html#method.from_ne_bytes
969 [`i128::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i128.html#method.to_be_bytes
970 [`i128::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i128.html#method.to_le_bytes
971 [`i128::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i128.html#method.to_ne_bytes
972 [`i16::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i16.html#method.from_be_bytes
973 [`i16::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i16.html#method.from_le_bytes
974 [`i16::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i16.html#method.from_ne_bytes
975 [`i16::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i16.html#method.to_be_bytes
976 [`i16::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i16.html#method.to_le_bytes
977 [`i16::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i16.html#method.to_ne_bytes
978 [`i32::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i32.html#method.from_be_bytes
979 [`i32::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i32.html#method.from_le_bytes
980 [`i32::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i32.html#method.from_ne_bytes
981 [`i32::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i32.html#method.to_be_bytes
982 [`i32::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i32.html#method.to_le_bytes
983 [`i32::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i32.html#method.to_ne_bytes
984 [`i64::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i64.html#method.from_be_bytes
985 [`i64::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i64.html#method.from_le_bytes
986 [`i64::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i64.html#method.from_ne_bytes
987 [`i64::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i64.html#method.to_be_bytes
988 [`i64::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i64.html#method.to_le_bytes
989 [`i64::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i64.html#method.to_ne_bytes
990 [`i8::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i8.html#method.from_be_bytes
991 [`i8::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i8.html#method.from_le_bytes
992 [`i8::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i8.html#method.from_ne_bytes
993 [`i8::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i8.html#method.to_be_bytes
994 [`i8::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i8.html#method.to_le_bytes
995 [`i8::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i8.html#method.to_ne_bytes
996 [`isize::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.isize.html#method.from_be_bytes
997 [`isize::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.isize.html#method.from_le_bytes
998 [`isize::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.isize.html#method.from_ne_bytes
999 [`isize::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.isize.html#method.to_be_bytes
1000 [`isize::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.isize.html#method.to_le_bytes
1001 [`isize::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.isize.html#method.to_ne_bytes
1002 [`iter::empty`]: https://doc.rust-lang.org/std/iter/fn.empty.html
1003 [`str::as_ptr`]: https://doc.rust-lang.org/std/primitive.str.html#method.as_ptr
1004 [`u128::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u128.html#method.from_be_bytes
1005 [`u128::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u128.html#method.from_le_bytes
1006 [`u128::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u128.html#method.from_ne_bytes
1007 [`u128::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u128.html#method.to_be_bytes
1008 [`u128::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u128.html#method.to_le_bytes
1009 [`u128::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u128.html#method.to_ne_bytes
1010 [`u16::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u16.html#method.from_be_bytes
1011 [`u16::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u16.html#method.from_le_bytes
1012 [`u16::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u16.html#method.from_ne_bytes
1013 [`u16::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u16.html#method.to_be_bytes
1014 [`u16::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u16.html#method.to_le_bytes
1015 [`u16::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u16.html#method.to_ne_bytes
1016 [`u32::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u32.html#method.from_be_bytes
1017 [`u32::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u32.html#method.from_le_bytes
1018 [`u32::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u32.html#method.from_ne_bytes
1019 [`u32::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u32.html#method.to_be_bytes
1020 [`u32::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u32.html#method.to_le_bytes
1021 [`u32::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u32.html#method.to_ne_bytes
1022 [`u64::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u64.html#method.from_be_bytes
1023 [`u64::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u64.html#method.from_le_bytes
1024 [`u64::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u64.html#method.from_ne_bytes
1025 [`u64::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u64.html#method.to_be_bytes
1026 [`u64::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u64.html#method.to_le_bytes
1027 [`u64::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u64.html#method.to_ne_bytes
1028 [`u8::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u8.html#method.from_be_bytes
1029 [`u8::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u8.html#method.from_le_bytes
1030 [`u8::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u8.html#method.from_ne_bytes
1031 [`u8::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u8.html#method.to_be_bytes
1032 [`u8::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u8.html#method.to_le_bytes
1033 [`u8::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u8.html#method.to_ne_bytes
1034 [`usize::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.usize.html#method.from_be_bytes
1035 [`usize::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.usize.html#method.from_le_bytes
1036 [`usize::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.usize.html#method.from_ne_bytes
1037 [`usize::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.usize.html#method.to_be_bytes
1038 [`usize::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.usize.html#method.to_le_bytes
1039 [`usize::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.usize.html#method.to_ne_bytes
1042 Version 1.31.1 (2018-12-20)
1043 ===========================
1045 - [Fix Rust failing to build on `powerpc-unknown-netbsd`][56562]
1046 - [Fix broken go-to-definition in RLS][rls/1171]
1047 - [Fix infinite loop on hover in RLS][rls/1170]
1049 [56562]: https://github.com/rust-lang/rust/pull/56562
1050 [rls/1171]: https://github.com/rust-lang/rls/issues/1171
1051 [rls/1170]: https://github.com/rust-lang/rls/pull/1170
1053 Version 1.31.0 (2018-12-06)
1054 ==========================
1058 - 🎉 [This version marks the release of the 2018 edition of Rust.][54057] 🎉
1059 - [New lifetime elision rules now allow for eliding lifetimes in functions and
1060 impl headers.][54778] E.g. `impl<'a> Reader for BufReader<'a> {}` can now be
1061 `impl Reader for BufReader<'_> {}`. Lifetimes are still required to be defined
1063 - [You can now define and use `const` functions.][54835] These are currently
1064 a strict minimal subset of the [const fn RFC][RFC-911]. Refer to the
1065 [language reference][const-reference] for what exactly is available.
1066 - [You can now use tool lints, which allow you to scope lints from external
1067 tools using attributes.][54870] E.g. `#[allow(clippy::filter_map)]`.
1068 - [`#[no_mangle]` and `#[export_name]` attributes can now be located anywhere in
1069 a crate, not just in exported functions.][54451]
1070 - [You can now use parentheses in pattern matches.][54497]
1074 - [Updated musl to 1.1.20][54430]
1078 - [You can now convert `num::NonZero*` types to their raw equivalents using the
1079 `From` trait.][54240] E.g. `u8` now implements `From<NonZeroU8>`.
1080 - [You can now convert a `&Option<T>` into `Option<&T>` and `&mut Option<T>`
1081 into `Option<&mut T>` using the `From` trait.][53218]
1082 - [You can now multiply (`*`) a `time::Duration` by a `u32`.][52813]
1087 - [`slice::align_to`]
1088 - [`slice::align_to_mut`]
1089 - [`slice::chunks_exact`]
1090 - [`slice::chunks_exact_mut`]
1091 - [`slice::rchunks`]
1092 - [`slice::rchunks_mut`]
1093 - [`slice::rchunks_exact`]
1094 - [`slice::rchunks_exact_mut`]
1095 - [`Option::replace`]
1099 - [Cargo will now download crates in parallel using HTTP/2.][cargo/6005]
1100 - [You can now rename packages in your Cargo.toml][cargo/6319] We have a guide
1101 on [how to use the `package` key in your dependencies.][cargo-rename-reference]
1103 [52813]: https://github.com/rust-lang/rust/pull/52813/
1104 [53218]: https://github.com/rust-lang/rust/pull/53218/
1105 [53555]: https://github.com/rust-lang/rust/issues/53555/
1106 [54057]: https://github.com/rust-lang/rust/pull/54057/
1107 [54240]: https://github.com/rust-lang/rust/pull/54240/
1108 [54430]: https://github.com/rust-lang/rust/pull/54430/
1109 [54451]: https://github.com/rust-lang/rust/pull/54451/
1110 [54497]: https://github.com/rust-lang/rust/pull/54497/
1111 [54778]: https://github.com/rust-lang/rust/pull/54778/
1112 [54835]: https://github.com/rust-lang/rust/pull/54835/
1113 [54870]: https://github.com/rust-lang/rust/pull/54870/
1114 [RFC-911]: https://github.com/rust-lang/rfcs/pull/911
1115 [`Option::replace`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.replace
1116 [`slice::align_to_mut`]: https://doc.rust-lang.org/std/primitive.slice.html#method.align_to_mut
1117 [`slice::align_to`]: https://doc.rust-lang.org/std/primitive.slice.html#method.align_to
1118 [`slice::chunks_exact_mut`]: https://doc.rust-lang.org/std/primitive.slice.html#method.chunks_exact_mut
1119 [`slice::chunks_exact`]: https://doc.rust-lang.org/std/primitive.slice.html#method.chunks_exact
1120 [`slice::rchunks_exact_mut`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rchunks_mut
1121 [`slice::rchunks_exact`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rchunks_exact
1122 [`slice::rchunks_mut`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rchunks_mut
1123 [`slice::rchunks`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rchunks
1124 [cargo/6005]: https://github.com/rust-lang/cargo/pull/6005/
1125 [cargo/6319]: https://github.com/rust-lang/cargo/pull/6319/
1126 [cargo-rename-reference]: https://doc.rust-lang.org/cargo/reference/specifying-dependencies.html#renaming-dependencies-in-cargotoml
1127 [const-reference]: https://doc.rust-lang.org/reference/items/functions.html#const-functions
1129 Version 1.30.1 (2018-11-08)
1130 ===========================
1132 - [Fixed overflow ICE in rustdoc][54199]
1133 - [Cap Cargo progress bar width at 60 in MSYS terminals][cargo/6122]
1135 [54199]: https://github.com/rust-lang/rust/pull/54199
1136 [cargo/6122]: https://github.com/rust-lang/cargo/pull/6122
1138 Version 1.30.0 (2018-10-25)
1139 ==========================
1143 - [Procedural macros are now available.][52081] These kinds of macros allow for
1144 more powerful code generation. There is a [new chapter available][proc-macros]
1145 in the Rust Programming Language book that goes further in depth.
1146 - [You can now use keywords as identifiers using the raw identifiers
1147 syntax (`r#`),][53236] e.g. `let r#for = true;`
1148 - [Using anonymous parameters in traits is now deprecated with a warning and
1149 will be a hard error in the 2018 edition.][53272]
1150 - [You can now use `crate` in paths.][54404] This allows you to refer to the
1151 crate root in the path, e.g. `use crate::foo;` refers to `foo` in `src/lib.rs`.
1152 - [Using a external crate no longer requires being prefixed with `::`.][54404]
1153 Previously, using a external crate in a module without a use statement
1154 required `let json = ::serde_json::from_str(foo);` but can now be written
1155 as `let json = serde_json::from_str(foo);`.
1156 - [You can now apply the `#[used]` attribute to static items to prevent the
1157 compiler from optimising them away, even if they appear to be unused,][51363]
1158 e.g. `#[used] static FOO: u32 = 1;`
1159 - [You can now import and reexport macros from other crates with the `use`
1160 syntax.][50911] Macros exported with `#[macro_export]` are now placed into
1161 the root module of the crate. If your macro relies on calling other local
1162 macros, it is recommended to export with the
1163 `#[macro_export(local_inner_macros)]` attribute so users won't have to import
1165 - [You can now catch visibility keywords (e.g. `pub`, `pub(crate)`) in macros
1166 using the `vis` specifier.][53370]
1167 - [Non-macro attributes now allow all forms of literals, not just
1168 strings.][53044] Previously, you would write `#[attr("true")]`, and you can now
1169 write `#[attr(true)]`.
1170 - [You can now specify a function to handle a panic in the Rust runtime with the
1171 `#[panic_handler]` attribute.][51366]
1175 - [Added the `riscv32imc-unknown-none-elf` target.][53822]
1176 - [Added the `aarch64-unknown-netbsd` target][53165]
1180 - [`ManuallyDrop` now allows the inner type to be unsized.][53033]
1184 - [`Ipv4Addr::BROADCAST`]
1185 - [`Ipv4Addr::LOCALHOST`]
1186 - [`Ipv4Addr::UNSPECIFIED`]
1187 - [`Ipv6Addr::LOCALHOST`]
1188 - [`Ipv6Addr::UNSPECIFIED`]
1189 - [`Iterator::find_map`]
1191 The following methods are replacement methods for `trim_left`, `trim_right`,
1192 `trim_left_matches`, and `trim_right_matches`, which will be deprecated
1194 - [`str::trim_end_matches`]
1196 - [`str::trim_start_matches`]
1197 - [`str::trim_start`]
1201 - [`cargo run` doesn't require specifying a package in workspaces.][cargo/5877]
1202 - [`cargo doc` now supports `--message-format=json`.][cargo/5878] This is
1203 equivalent to calling `rustdoc --error-format=json`.
1204 - [Cargo will now provide a progress bar for builds.][cargo/5995]
1208 - [`rustdoc` allows you to specify what edition to treat your code as with the
1209 `--edition` option.][54057]
1210 - [`rustdoc` now has the `--color` (specify whether to output color) and
1211 `--error-format` (specify error format, e.g. `json`) options.][53003]
1212 - [We now distribute a `rust-gdbgui` script that invokes `gdbgui` with Rust
1213 debug symbols.][53774]
1214 - [Attributes from Rust tools such as `rustfmt` or `clippy` are now
1215 available,][53459] e.g. `#[rustfmt::skip]` will skip formatting the next item.
1217 [50911]: https://github.com/rust-lang/rust/pull/50911/
1218 [51363]: https://github.com/rust-lang/rust/pull/51363/
1219 [51366]: https://github.com/rust-lang/rust/pull/51366/
1220 [52081]: https://github.com/rust-lang/rust/pull/52081/
1221 [53003]: https://github.com/rust-lang/rust/pull/53003/
1222 [53033]: https://github.com/rust-lang/rust/pull/53033/
1223 [53044]: https://github.com/rust-lang/rust/pull/53044/
1224 [53165]: https://github.com/rust-lang/rust/pull/53165/
1225 [53213]: https://github.com/rust-lang/rust/pull/53213/
1226 [53236]: https://github.com/rust-lang/rust/pull/53236/
1227 [53272]: https://github.com/rust-lang/rust/pull/53272/
1228 [53370]: https://github.com/rust-lang/rust/pull/53370/
1229 [53459]: https://github.com/rust-lang/rust/pull/53459/
1230 [53774]: https://github.com/rust-lang/rust/pull/53774/
1231 [53822]: https://github.com/rust-lang/rust/pull/53822/
1232 [54057]: https://github.com/rust-lang/rust/pull/54057/
1233 [54146]: https://github.com/rust-lang/rust/pull/54146/
1234 [54404]: https://github.com/rust-lang/rust/pull/54404/
1235 [cargo/5877]: https://github.com/rust-lang/cargo/pull/5877/
1236 [cargo/5878]: https://github.com/rust-lang/cargo/pull/5878/
1237 [cargo/5995]: https://github.com/rust-lang/cargo/pull/5995/
1238 [proc-macros]: https://doc.rust-lang.org/nightly/book/2018-edition/ch19-06-macros.html
1240 [`Ipv4Addr::BROADCAST`]: https://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#associatedconstant.BROADCAST
1241 [`Ipv4Addr::LOCALHOST`]: https://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#associatedconstant.LOCALHOST
1242 [`Ipv4Addr::UNSPECIFIED`]: https://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#associatedconstant.UNSPECIFIED
1243 [`Ipv6Addr::LOCALHOST`]: https://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#associatedconstant.LOCALHOST
1244 [`Ipv6Addr::UNSPECIFIED`]: https://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#associatedconstant.UNSPECIFIED
1245 [`Iterator::find_map`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.find_map
1246 [`str::trim_end_matches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.trim_end_matches
1247 [`str::trim_end`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.trim_end
1248 [`str::trim_start_matches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.trim_start_matches
1249 [`str::trim_start`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.trim_start
1252 Version 1.29.2 (2018-10-11)
1253 ===========================
1255 - [Workaround for an aliasing-related LLVM bug, which caused miscompilation.][54639]
1256 - The `rls-preview` component on the windows-gnu targets has been restored.
1258 [54639]: https://github.com/rust-lang/rust/pull/54639
1261 Version 1.29.1 (2018-09-25)
1262 ===========================
1267 - The standard library's `str::repeat` function contained an out of bounds write
1268 caused by an integer overflow. This has been fixed by deterministically
1269 panicking when an overflow happens.
1271 Thank you to Scott McMurray for responsibly disclosing this vulnerability to
1275 Version 1.29.0 (2018-09-13)
1276 ==========================
1280 - [Bumped minimum LLVM version to 5.0.][51899]
1281 - [Added `powerpc64le-unknown-linux-musl` target.][51619]
1282 - [Added `aarch64-unknown-hermit` and `x86_64-unknown-hermit` targets.][52861]
1286 - [`Once::call_once` no longer requires `Once` to be `'static`.][52239]
1287 - [`BuildHasherDefault` now implements `PartialEq` and `Eq`.][52402]
1288 - [`Box<CStr>`, `Box<OsStr>`, and `Box<Path>` now implement `Clone`.][51912]
1289 - [Implemented `PartialEq<&str>` for `OsString` and `PartialEq<OsString>`
1291 - [`Cell<T>` now allows `T` to be unsized.][50494]
1292 - [`SocketAddr` is now stable on Redox.][52656]
1297 - [`Iterator::flatten`]
1302 - [Cargo can silently fix some bad lockfiles.][cargo/5831] You can use
1303 `--locked` to disable this behavior.
1304 - [`cargo-install` will now allow you to cross compile an install
1305 using `--target`.][cargo/5614]
1306 - [Added the `cargo-fix` subcommand to automatically move project code from
1307 2015 edition to 2018.][cargo/5723]
1308 - [`cargo doc` can now optionally document private types using the
1309 `--document-private-items` flag.][cargo/5543]
1313 - [`rustdoc` now has the `--cap-lints` option which demotes all lints above
1314 the specified level to that level.][52354] For example `--cap-lints warn`
1315 will demote `deny` and `forbid` lints to `warn`.
1316 - [`rustc` and `rustdoc` will now have the exit code of `1` if compilation
1317 fails and `101` if there is a panic.][52197]
1318 - [A preview of clippy has been made available through rustup.][51122]
1319 You can install the preview with `rustup component add clippy-preview`.
1323 - [`str::{slice_unchecked, slice_unchecked_mut}` are now deprecated.][51807]
1324 Use `str::get_unchecked(begin..end)` instead.
1325 - [`std::env::home_dir` is now deprecated for its unintuitive behavior.][51656]
1326 Consider using the `home_dir` function from
1327 https://crates.io/crates/dirs instead.
1328 - [`rustc` will no longer silently ignore invalid data in target spec.][52330]
1329 - [`cfg` attributes and `--cfg` command line flags are now more
1330 strictly validated.][53893]
1332 [53893]: https://github.com/rust-lang/rust/pull/53893/
1333 [52861]: https://github.com/rust-lang/rust/pull/52861/
1334 [52656]: https://github.com/rust-lang/rust/pull/52656/
1335 [52239]: https://github.com/rust-lang/rust/pull/52239/
1336 [52330]: https://github.com/rust-lang/rust/pull/52330/
1337 [52354]: https://github.com/rust-lang/rust/pull/52354/
1338 [52402]: https://github.com/rust-lang/rust/pull/52402/
1339 [52103]: https://github.com/rust-lang/rust/pull/52103/
1340 [52197]: https://github.com/rust-lang/rust/pull/52197/
1341 [51807]: https://github.com/rust-lang/rust/pull/51807/
1342 [51899]: https://github.com/rust-lang/rust/pull/51899/
1343 [51912]: https://github.com/rust-lang/rust/pull/51912/
1344 [51511]: https://github.com/rust-lang/rust/pull/51511/
1345 [51619]: https://github.com/rust-lang/rust/pull/51619/
1346 [51656]: https://github.com/rust-lang/rust/pull/51656/
1347 [51178]: https://github.com/rust-lang/rust/pull/51178/
1348 [51122]: https://github.com/rust-lang/rust/pull/51122
1349 [50494]: https://github.com/rust-lang/rust/pull/50494/
1350 [cargo/5543]: https://github.com/rust-lang/cargo/pull/5543
1351 [cargo/5614]: https://github.com/rust-lang/cargo/pull/5614/
1352 [cargo/5723]: https://github.com/rust-lang/cargo/pull/5723/
1353 [cargo/5831]: https://github.com/rust-lang/cargo/pull/5831/
1354 [`Arc::downcast`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.downcast
1355 [`Iterator::flatten`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.flatten
1356 [`Rc::downcast`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.downcast
1359 Version 1.28.0 (2018-08-02)
1360 ===========================
1364 - [The `#[repr(transparent)]` attribute is now stable.][51562] This attribute
1365 allows a Rust newtype wrapper (`struct NewType<T>(T);`) to be represented as
1366 the inner type across Foreign Function Interface (FFI) boundaries.
1367 - [The keywords `pure`, `sizeof`, `alignof`, and `offsetof` have been unreserved
1368 and can now be used as identifiers.][51196]
1369 - [The `GlobalAlloc` trait and `#[global_allocator]` attribute are now
1370 stable.][51241] This will allow users to specify a global allocator for
1372 - [Unit test functions marked with the `#[test]` attribute can now return
1373 `Result<(), E: Debug>` in addition to `()`.][51298]
1374 - [The `lifetime` specifier for `macro_rules!` is now stable.][50385] This
1375 allows macros to easily target lifetimes.
1379 - [The `s` and `z` optimisation levels are now stable.][50265] These optimisations
1380 prioritise making smaller binary sizes. `z` is the same as `s` with the
1381 exception that it does not vectorise loops, which typically results in an even
1383 - [The short error format is now stable.][49546] Specified with
1384 `--error-format=short` this option will provide a more compressed output of
1385 rust error messages.
1386 - [Added a lint warning when you have duplicated `macro_export`s.][50143]
1387 - [Reduced the number of allocations in the macro parser.][50855] This can
1388 improve compile times of macro heavy crates on average by 5%.
1392 - [Implemented `Default` for `&mut str`.][51306]
1393 - [Implemented `From<bool>` for all integer and unsigned number types.][50554]
1394 - [Implemented `Extend` for `()`.][50234]
1395 - [The `Debug` implementation of `time::Duration` should now be more easily
1396 human readable.][50364] Previously a `Duration` of one second would printed as
1397 `Duration { secs: 1, nanos: 0 }` and will now be printed as `1s`.
1398 - [Implemented `From<&String>` for `Cow<str>`, `From<&Vec<T>>` for `Cow<[T]>`,
1399 `From<Cow<CStr>>` for `CString`, `From<CString>, From<CStr>, From<&CString>`
1400 for `Cow<CStr>`, `From<OsString>, From<OsStr>, From<&OsString>` for
1401 `Cow<OsStr>`, `From<&PathBuf>` for `Cow<Path>`, and `From<Cow<Path>>`
1402 for `PathBuf`.][50170]
1403 - [Implemented `Shl` and `Shr` for `Wrapping<u128>`
1404 and `Wrapping<i128>`.][50465]
1405 - [`DirEntry::metadata` now uses `fstatat` instead of `lstat` when
1406 possible.][51050] This can provide up to a 40% speed increase.
1407 - [Improved error messages when using `format!`.][50610]
1411 - [`Iterator::step_by`]
1412 - [`Path::ancestors`]
1413 - [`SystemTime::UNIX_EPOCH`]
1414 - [`alloc::GlobalAlloc`]
1416 - [`alloc::LayoutErr`]
1419 - [`alloc::alloc_zeroed`]
1420 - [`alloc::dealloc`]
1421 - [`alloc::realloc`]
1422 - [`alloc::handle_alloc_error`]
1423 - [`btree_map::Entry::or_default`]
1424 - [`fmt::Alignment`]
1425 - [`hash_map::Entry::or_default`]
1426 - [`iter::repeat_with`]
1427 - [`num::NonZeroUsize`]
1428 - [`num::NonZeroU128`]
1429 - [`num::NonZeroU16`]
1430 - [`num::NonZeroU32`]
1431 - [`num::NonZeroU64`]
1432 - [`num::NonZeroU8`]
1433 - [`ops::RangeBounds`]
1434 - [`slice::SliceIndex`]
1435 - [`slice::from_mut`]
1436 - [`slice::from_ref`]
1437 - [`{Any + Send + Sync}::downcast_mut`]
1438 - [`{Any + Send + Sync}::downcast_ref`]
1439 - [`{Any + Send + Sync}::is`]
1443 - [Cargo will now no longer allow you to publish crates with build scripts that
1444 modify the `src` directory.][cargo/5584] The `src` directory in a crate should be
1445 considered to be immutable.
1449 - [The `suggestion_applicability` field in `rustc`'s json output is now
1450 stable.][50486] This will allow dev tools to check whether a code suggestion
1451 would apply to them.
1455 - [Rust will consider trait objects with duplicated constraints to be the same
1456 type as without the duplicated constraint.][51276] For example the below code will
1457 now fail to compile.
1462 fn test(&self) { println!("one"); } //~ ERROR duplicate definitions with name `test`
1465 impl Trait + Send + Send {
1466 fn test(&self) { println!("two"); }
1470 [49546]: https://github.com/rust-lang/rust/pull/49546/
1471 [50143]: https://github.com/rust-lang/rust/pull/50143/
1472 [50170]: https://github.com/rust-lang/rust/pull/50170/
1473 [50234]: https://github.com/rust-lang/rust/pull/50234/
1474 [50265]: https://github.com/rust-lang/rust/pull/50265/
1475 [50364]: https://github.com/rust-lang/rust/pull/50364/
1476 [50385]: https://github.com/rust-lang/rust/pull/50385/
1477 [50465]: https://github.com/rust-lang/rust/pull/50465/
1478 [50486]: https://github.com/rust-lang/rust/pull/50486/
1479 [50554]: https://github.com/rust-lang/rust/pull/50554/
1480 [50610]: https://github.com/rust-lang/rust/pull/50610/
1481 [50855]: https://github.com/rust-lang/rust/pull/50855/
1482 [51050]: https://github.com/rust-lang/rust/pull/51050/
1483 [51196]: https://github.com/rust-lang/rust/pull/51196/
1484 [51200]: https://github.com/rust-lang/rust/pull/51200/
1485 [51241]: https://github.com/rust-lang/rust/pull/51241/
1486 [51276]: https://github.com/rust-lang/rust/pull/51276/
1487 [51298]: https://github.com/rust-lang/rust/pull/51298/
1488 [51306]: https://github.com/rust-lang/rust/pull/51306/
1489 [51562]: https://github.com/rust-lang/rust/pull/51562/
1490 [cargo/5584]: https://github.com/rust-lang/cargo/pull/5584/
1491 [`Iterator::step_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.step_by
1492 [`Path::ancestors`]: https://doc.rust-lang.org/std/path/struct.Path.html#method.ancestors
1493 [`SystemTime::UNIX_EPOCH`]: https://doc.rust-lang.org/std/time/struct.SystemTime.html#associatedconstant.UNIX_EPOCH
1494 [`alloc::GlobalAlloc`]: https://doc.rust-lang.org/std/alloc/trait.GlobalAlloc.html
1495 [`alloc::Layout`]: https://doc.rust-lang.org/std/alloc/struct.Layout.html
1496 [`alloc::LayoutErr`]: https://doc.rust-lang.org/std/alloc/struct.LayoutErr.html
1497 [`alloc::System`]: https://doc.rust-lang.org/std/alloc/struct.System.html
1498 [`alloc::alloc`]: https://doc.rust-lang.org/std/alloc/fn.alloc.html
1499 [`alloc::alloc_zeroed`]: https://doc.rust-lang.org/std/alloc/fn.alloc_zeroed.html
1500 [`alloc::dealloc`]: https://doc.rust-lang.org/std/alloc/fn.dealloc.html
1501 [`alloc::realloc`]: https://doc.rust-lang.org/std/alloc/fn.realloc.html
1502 [`alloc::handle_alloc_error`]: https://doc.rust-lang.org/std/alloc/fn.handle_alloc_error.html
1503 [`btree_map::Entry::or_default`]: https://doc.rust-lang.org/std/collections/btree_map/enum.Entry.html#method.or_default
1504 [`fmt::Alignment`]: https://doc.rust-lang.org/std/fmt/enum.Alignment.html
1505 [`hash_map::Entry::or_default`]: https://doc.rust-lang.org/std/collections/hash_map/enum.Entry.html#method.or_default
1506 [`iter::repeat_with`]: https://doc.rust-lang.org/std/iter/fn.repeat_with.html
1507 [`num::NonZeroUsize`]: https://doc.rust-lang.org/std/num/struct.NonZeroUsize.html
1508 [`num::NonZeroU128`]: https://doc.rust-lang.org/std/num/struct.NonZeroU128.html
1509 [`num::NonZeroU16`]: https://doc.rust-lang.org/std/num/struct.NonZeroU16.html
1510 [`num::NonZeroU32`]: https://doc.rust-lang.org/std/num/struct.NonZeroU32.html
1511 [`num::NonZeroU64`]: https://doc.rust-lang.org/std/num/struct.NonZeroU64.html
1512 [`num::NonZeroU8`]: https://doc.rust-lang.org/std/num/struct.NonZeroU8.html
1513 [`ops::RangeBounds`]: https://doc.rust-lang.org/std/ops/trait.RangeBounds.html
1514 [`slice::SliceIndex`]: https://doc.rust-lang.org/std/slice/trait.SliceIndex.html
1515 [`slice::from_mut`]: https://doc.rust-lang.org/std/slice/fn.from_mut.html
1516 [`slice::from_ref`]: https://doc.rust-lang.org/std/slice/fn.from_ref.html
1517 [`{Any + Send + Sync}::downcast_mut`]: https://doc.rust-lang.org/std/any/trait.Any.html#method.downcast_mut-2
1518 [`{Any + Send + Sync}::downcast_ref`]: https://doc.rust-lang.org/std/any/trait.Any.html#method.downcast_ref-2
1519 [`{Any + Send + Sync}::is`]: https://doc.rust-lang.org/std/any/trait.Any.html#method.is-2
1521 Version 1.27.2 (2018-07-20)
1522 ===========================
1527 - The borrow checker was fixed to avoid potential unsoundness when using
1528 match ergonomics: [#52213][52213].
1530 [52213]: https://github.com/rust-lang/rust/issues/52213
1532 Version 1.27.1 (2018-07-10)
1533 ===========================
1538 - rustdoc would execute plugins in the /tmp/rustdoc/plugins directory
1539 when running, which enabled executing code as some other user on a
1540 given machine. This release fixes that vulnerability; you can read
1541 more about this on the [blog][rustdoc-sec]. The associated CVE is [CVE-2018-1000622].
1543 Thank you to Red Hat for responsibly disclosing this vulnerability to us.
1548 - The borrow checker was fixed to avoid an additional potential unsoundness when using
1549 match ergonomics: [#51415][51415], [#49534][49534].
1551 [51415]: https://github.com/rust-lang/rust/issues/51415
1552 [49534]: https://github.com/rust-lang/rust/issues/49534
1553 [rustdoc-sec]: https://blog.rust-lang.org/2018/07/06/security-advisory-for-rustdoc.html
1554 [CVE-2018-1000622]: https://cve.mitre.org/cgi-bin/cvename.cgi?name=%20CVE-2018-1000622
1556 Version 1.27.0 (2018-06-21)
1557 ==========================
1561 - [Removed 'proc' from the reserved keywords list.][49699] This allows `proc` to
1562 be used as an identifier.
1563 - [The dyn syntax is now available.][49968] This syntax is equivalent to the
1564 bare `Trait` syntax, and should make it clearer when being used in tandem with
1565 `impl Trait` because it is equivalent to the following syntax:
1566 `&Trait == &dyn Trait`, `&mut Trait == &mut dyn Trait`, and
1567 `Box<Trait> == Box<dyn Trait>`.
1568 - [Attributes on generic parameters such as types and lifetimes are
1569 now stable.][48851] e.g.
1570 `fn foo<#[lifetime_attr] 'a, #[type_attr] T: 'a>() {}`
1571 - [The `#[must_use]` attribute can now also be used on functions as well as
1572 types.][48925] It provides a lint that by default warns users when the
1573 value returned by a function has not been used.
1577 - [Added the `armv5te-unknown-linux-musleabi` target.][50423]
1581 - [SIMD (Single Instruction Multiple Data) on x86/x86_64 is now stable.][49664]
1582 This includes [`arch::x86`] & [`arch::x86_64`] modules which contain
1583 SIMD intrinsics, a new macro called `is_x86_feature_detected!`, the
1584 `#[target_feature(enable="")]` attribute, and adding `target_feature = ""` to
1585 the `cfg` attribute.
1586 - [A lot of methods for `[u8]`, `f32`, and `f64` previously only available in
1587 std are now available in core.][49896]
1588 - [The generic `Rhs` type parameter on `ops::{Shl, ShlAssign, Shr}` now defaults
1590 - [`std::str::replace` now has the `#[must_use]` attribute][50177] to clarify
1591 that the operation isn't done in place.
1592 - [`Clone::clone`, `Iterator::collect`, and `ToOwned::to_owned` now have
1593 the `#[must_use]` attribute][49533] to warn about unused potentially
1594 expensive allocations.
1598 - [`DoubleEndedIterator::rfind`]
1599 - [`DoubleEndedIterator::rfold`]
1600 - [`DoubleEndedIterator::try_rfold`]
1601 - [`Duration::from_micros`]
1602 - [`Duration::from_nanos`]
1603 - [`Duration::subsec_micros`]
1604 - [`Duration::subsec_millis`]
1605 - [`HashMap::remove_entry`]
1606 - [`Iterator::try_fold`]
1607 - [`Iterator::try_for_each`]
1609 - [`Option::filter`]
1610 - [`String::replace_range`]
1611 - [`Take::set_limit`]
1612 - [`hint::unreachable_unchecked`]
1613 - [`os::unix::process::parent_id`]
1614 - [`ptr::swap_nonoverlapping`]
1615 - [`slice::rsplit_mut`]
1617 - [`slice::swap_with_slice`]
1621 - [`cargo-metadata` now includes `authors`, `categories`, `keywords`,
1622 `readme`, and `repository` fields.][cargo/5386]
1623 - [`cargo-metadata` now includes a package's `metadata` table.][cargo/5360]
1624 - [Added the `--target-dir` optional argument.][cargo/5393] This allows you to specify
1625 a different directory than `target` for placing compilation artifacts.
1626 - [Cargo will be adding automatic target inference for binaries, benchmarks,
1627 examples, and tests in the Rust 2018 edition.][cargo/5335] If your project specifies
1628 specific targets, e.g. using `[[bin]]`, and have other binaries in locations
1629 where cargo would infer a binary, Cargo will produce a warning. You can
1630 disable this feature ahead of time by setting any of the following to false:
1631 `autobins`, `autobenches`, `autoexamples`, `autotests`.
1632 - [Cargo will now cache compiler information.][cargo/5359] This can be disabled by
1633 setting `CARGO_CACHE_RUSTC_INFO=0` in your environment.
1637 - [Added “The Rustc book” into the official documentation.][49707]
1638 [“The Rustc book”] documents and teaches how to use the rustc compiler.
1639 - [All books available on `doc.rust-lang.org` are now searchable.][49623]
1643 - [Calling a `CharExt` or `StrExt` method directly on core will no longer
1644 work.][49896] e.g. `::core::prelude::v1::StrExt::is_empty("")` will not
1645 compile, `"".is_empty()` will still compile.
1646 - [`Debug` output on `atomic::{AtomicBool, AtomicIsize, AtomicPtr, AtomicUsize}`
1647 will only print the inner type.][48553] E.g.
1648 `print!("{:?}", AtomicBool::new(true))` will print `true`,
1649 not `AtomicBool(true)`.
1650 - [The maximum number for `repr(align(N))` is now 2²⁹.][50378] Previously you
1651 could enter higher numbers but they were not supported by LLVM. Up to 512MB
1652 alignment should cover all use cases.
1653 - The `.description()` method on the `std::error::Error` trait
1654 [has been soft-deprecated][50163]. It is no longer required to implement it.
1656 [48553]: https://github.com/rust-lang/rust/pull/48553/
1657 [48851]: https://github.com/rust-lang/rust/pull/48851/
1658 [48925]: https://github.com/rust-lang/rust/pull/48925/
1659 [49533]: https://github.com/rust-lang/rust/pull/49533/
1660 [49623]: https://github.com/rust-lang/rust/pull/49623/
1661 [49630]: https://github.com/rust-lang/rust/pull/49630/
1662 [49664]: https://github.com/rust-lang/rust/pull/49664/
1663 [49699]: https://github.com/rust-lang/rust/pull/49699/
1664 [49707]: https://github.com/rust-lang/rust/pull/49707/
1665 [49719]: https://github.com/rust-lang/rust/pull/49719/
1666 [49896]: https://github.com/rust-lang/rust/pull/49896/
1667 [49968]: https://github.com/rust-lang/rust/pull/49968/
1668 [50163]: https://github.com/rust-lang/rust/pull/50163
1669 [50177]: https://github.com/rust-lang/rust/pull/50177/
1670 [50378]: https://github.com/rust-lang/rust/pull/50378/
1671 [50398]: https://github.com/rust-lang/rust/pull/50398/
1672 [50423]: https://github.com/rust-lang/rust/pull/50423/
1673 [cargo/5203]: https://github.com/rust-lang/cargo/pull/5203/
1674 [cargo/5335]: https://github.com/rust-lang/cargo/pull/5335/
1675 [cargo/5359]: https://github.com/rust-lang/cargo/pull/5359/
1676 [cargo/5360]: https://github.com/rust-lang/cargo/pull/5360/
1677 [cargo/5386]: https://github.com/rust-lang/cargo/pull/5386/
1678 [cargo/5393]: https://github.com/rust-lang/cargo/pull/5393/
1679 [`DoubleEndedIterator::rfind`]: https://doc.rust-lang.org/std/iter/trait.DoubleEndedIterator.html#method.rfind
1680 [`DoubleEndedIterator::rfold`]: https://doc.rust-lang.org/std/iter/trait.DoubleEndedIterator.html#method.rfold
1681 [`DoubleEndedIterator::try_rfold`]: https://doc.rust-lang.org/std/iter/trait.DoubleEndedIterator.html#method.try_rfold
1682 [`Duration::from_micros`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.from_micros
1683 [`Duration::from_nanos`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.from_nanos
1684 [`Duration::subsec_micros`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.subsec_micros
1685 [`Duration::subsec_millis`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.subsec_millis
1686 [`HashMap::remove_entry`]: https://doc.rust-lang.org/std/collections/struct.HashMap.html#method.remove_entry
1687 [`Iterator::try_fold`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.try_fold
1688 [`Iterator::try_for_each`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.try_for_each
1689 [`NonNull::cast`]: https://doc.rust-lang.org/std/ptr/struct.NonNull.html#method.cast
1690 [`Option::filter`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.filter
1691 [`String::replace_range`]: https://doc.rust-lang.org/std/string/struct.String.html#method.replace_range
1692 [`Take::set_limit`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.set_limit
1693 [`hint::unreachable_unchecked`]: https://doc.rust-lang.org/std/hint/fn.unreachable_unchecked.html
1694 [`os::unix::process::parent_id`]: https://doc.rust-lang.org/std/os/unix/process/fn.parent_id.html
1695 [`process::id`]: https://doc.rust-lang.org/std/process/fn.id.html
1696 [`ptr::swap_nonoverlapping`]: https://doc.rust-lang.org/std/ptr/fn.swap_nonoverlapping.html
1697 [`slice::rsplit_mut`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rsplit_mut
1698 [`slice::rsplit`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rsplit
1699 [`slice::swap_with_slice`]: https://doc.rust-lang.org/std/primitive.slice.html#method.swap_with_slice
1700 [`arch::x86_64`]: https://doc.rust-lang.org/std/arch/x86_64/index.html
1701 [`arch::x86`]: https://doc.rust-lang.org/std/arch/x86/index.html
1702 [“The Rustc book”]: https://doc.rust-lang.org/rustc
1705 Version 1.26.2 (2018-06-05)
1706 ==========================
1711 - [The borrow checker was fixed to avoid unsoundness when using match ergonomics.][51117]
1713 [51117]: https://github.com/rust-lang/rust/issues/51117
1716 Version 1.26.1 (2018-05-29)
1717 ==========================
1722 - [RLS now works on Windows.][50646]
1723 - [Rustfmt stopped badly formatting text in some cases.][rustfmt/2695]
1729 - [`fn main() -> impl Trait` no longer works for non-Termination
1731 This reverts an accidental stabilization.
1732 - [`NaN > NaN` no longer returns true in const-fn contexts.][50812]
1733 - [Prohibit using turbofish for `impl Trait` in method arguments.][50950]
1735 [50646]: https://github.com/rust-lang/rust/issues/50646
1736 [50656]: https://github.com/rust-lang/rust/pull/50656
1737 [50812]: https://github.com/rust-lang/rust/pull/50812
1738 [50950]: https://github.com/rust-lang/rust/issues/50950
1739 [rustfmt/2695]: https://github.com/rust-lang-nursery/rustfmt/issues/2695
1741 Version 1.26.0 (2018-05-10)
1742 ==========================
1746 - [Closures now implement `Copy` and/or `Clone` if all captured variables
1747 implement either or both traits.][49299]
1748 - [The inclusive range syntax e.g. `for x in 0..=10` is now stable.][47813]
1749 - [The `'_` lifetime is now stable. The underscore lifetime can be used anywhere a
1750 lifetime can be elided.][49458]
1751 - [`impl Trait` is now stable allowing you to have abstract types in returns
1752 or in function parameters.][49255] E.g. `fn foo() -> impl Iterator<Item=u8>` or
1753 `fn open(path: impl AsRef<Path>)`.
1754 - [Pattern matching will now automatically apply dereferences.][49394]
1755 - [128-bit integers in the form of `u128` and `i128` are now stable.][49101]
1756 - [`main` can now return `Result<(), E: Debug>`][49162] in addition to `()`.
1757 - [A lot of operations are now available in a const context.][46882] E.g. You
1758 can now index into constant arrays, reference and dereference into constants,
1759 and use tuple struct constructors.
1760 - [Fixed entry slice patterns are now stable.][48516] E.g.
1762 let points = [1, 2, 3, 4];
1764 [1, 2, 3, 4] => println!("All points were sequential."),
1765 _ => println!("Not all points were sequential."),
1772 - [LLD is now used as the default linker for `wasm32-unknown-unknown`.][48125]
1773 - [Fixed exponential projection complexity on nested types.][48296]
1774 This can provide up to a ~12% reduction in compile times for certain crates.
1775 - [Added the `--remap-path-prefix` option to rustc.][48359] Allowing you
1776 to remap path prefixes outputted by the compiler.
1777 - [Added `powerpc-unknown-netbsd` target.][48281]
1781 - [Implemented `From<u16> for usize` & `From<{u8, i16}> for isize`.][49305]
1782 - [Added hexadecimal formatting for integers with fmt::Debug][48978]
1783 e.g. `assert!(format!("{:02x?}", b"Foo\0") == "[46, 6f, 6f, 00]")`
1784 - [Implemented `Default, Hash` for `cmp::Reverse`.][48628]
1785 - [Optimized `str::repeat` being 8x faster in large cases.][48657]
1786 - [`ascii::escape_default` is now available in libcore.][48735]
1787 - [Trailing commas are now supported in std and core macros.][48056]
1788 - [Implemented `Copy, Clone` for `cmp::Reverse`][47379]
1789 - [Implemented `Clone` for `char::{ToLowercase, ToUppercase}`.][48629]
1794 - [`*const T::copy_to_nonoverlapping`]
1795 - [`*const T::copy_to`]
1796 - [`*const T::read_unaligned`]
1797 - [`*const T::read_volatile`]
1798 - [`*const T::read`]
1800 - [`*const T::wrapping_add`]
1801 - [`*const T::wrapping_sub`]
1803 - [`*mut T::copy_to_nonoverlapping`]
1804 - [`*mut T::copy_to`]
1805 - [`*mut T::read_unaligned`]
1806 - [`*mut T::read_volatile`]
1808 - [`*mut T::replace`]
1811 - [`*mut T::wrapping_add`]
1812 - [`*mut T::wrapping_sub`]
1813 - [`*mut T::write_bytes`]
1814 - [`*mut T::write_unaligned`]
1815 - [`*mut T::write_volatile`]
1818 - [`FromUtf8Error::as_bytes`]
1819 - [`LocalKey::try_with`]
1820 - [`Option::cloned`]
1821 - [`btree_map::Entry::and_modify`]
1822 - [`fs::read_to_string`]
1825 - [`hash_map::Entry::and_modify`]
1826 - [`iter::FusedIterator`]
1827 - [`ops::RangeInclusive`]
1828 - [`ops::RangeToInclusive`]
1830 - [`slice::rotate_left`]
1831 - [`slice::rotate_right`]
1832 - [`String::retain`]
1837 - [Cargo will now output path to custom commands when `-v` is
1838 passed with `--list`][cargo/5041]
1839 - [The Cargo binary version is now the same as the Rust version][cargo/5083]
1843 - [The second edition of "The Rust Programming Language" book is now recommended
1844 over the first.][48404]
1849 - [aliasing a `Fn` trait as `dyn` no longer works.][48481] E.g. the following
1850 syntax is now invalid.
1852 use std::ops::Fn as dyn;
1853 fn g(_: Box<dyn(std::fmt::Debug)>) {}
1855 - [The result of dereferences are no longer promoted to `'static`.][47408]
1859 const PAIR: &(i32, i32) = &(0, 1);
1860 let _reversed_pair: &'static _ = &(PAIR.1, PAIR.0); // Doesn't work
1863 - [Deprecate `AsciiExt` trait in favor of inherent methods.][49109]
1864 - [`".e0"` will now no longer parse as `0.0` and will instead cause
1866 - [Removed hoedown from rustdoc.][48274]
1867 - [Bounds on higher-kinded lifetimes a hard error.][48326]
1869 [46882]: https://github.com/rust-lang/rust/pull/46882
1870 [47379]: https://github.com/rust-lang/rust/pull/47379
1871 [47408]: https://github.com/rust-lang/rust/pull/47408
1872 [47813]: https://github.com/rust-lang/rust/pull/47813
1873 [48056]: https://github.com/rust-lang/rust/pull/48056
1874 [48125]: https://github.com/rust-lang/rust/pull/48125
1875 [48166]: https://github.com/rust-lang/rust/pull/48166
1876 [48235]: https://github.com/rust-lang/rust/pull/48235
1877 [48274]: https://github.com/rust-lang/rust/pull/48274
1878 [48281]: https://github.com/rust-lang/rust/pull/48281
1879 [48296]: https://github.com/rust-lang/rust/pull/48296
1880 [48326]: https://github.com/rust-lang/rust/pull/48326
1881 [48359]: https://github.com/rust-lang/rust/pull/48359
1882 [48404]: https://github.com/rust-lang/rust/pull/48404
1883 [48481]: https://github.com/rust-lang/rust/pull/48481
1884 [48516]: https://github.com/rust-lang/rust/pull/48516
1885 [48628]: https://github.com/rust-lang/rust/pull/48628
1886 [48629]: https://github.com/rust-lang/rust/pull/48629
1887 [48657]: https://github.com/rust-lang/rust/pull/48657
1888 [48735]: https://github.com/rust-lang/rust/pull/48735
1889 [48978]: https://github.com/rust-lang/rust/pull/48978
1890 [49101]: https://github.com/rust-lang/rust/pull/49101
1891 [49109]: https://github.com/rust-lang/rust/pull/49109
1892 [49121]: https://github.com/rust-lang/rust/pull/49121
1893 [49162]: https://github.com/rust-lang/rust/pull/49162
1894 [49184]: https://github.com/rust-lang/rust/pull/49184
1895 [49234]: https://github.com/rust-lang/rust/pull/49234
1896 [49255]: https://github.com/rust-lang/rust/pull/49255
1897 [49299]: https://github.com/rust-lang/rust/pull/49299
1898 [49305]: https://github.com/rust-lang/rust/pull/49305
1899 [49394]: https://github.com/rust-lang/rust/pull/49394
1900 [49458]: https://github.com/rust-lang/rust/pull/49458
1901 [`*const T::add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.add
1902 [`*const T::copy_to_nonoverlapping`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to_nonoverlapping
1903 [`*const T::copy_to`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to
1904 [`*const T::read_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_unaligned
1905 [`*const T::read_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_volatile
1906 [`*const T::read`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read
1907 [`*const T::sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.sub
1908 [`*const T::wrapping_add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_add
1909 [`*const T::wrapping_sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_sub
1910 [`*mut T::add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.add-1
1911 [`*mut T::copy_to_nonoverlapping`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to_nonoverlapping-1
1912 [`*mut T::copy_to`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to-1
1913 [`*mut T::read_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_unaligned-1
1914 [`*mut T::read_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_volatile-1
1915 [`*mut T::read`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read-1
1916 [`*mut T::replace`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.replace
1917 [`*mut T::sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.sub-1
1918 [`*mut T::swap`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.swap
1919 [`*mut T::wrapping_add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_add-1
1920 [`*mut T::wrapping_sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_sub-1
1921 [`*mut T::write_bytes`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_bytes
1922 [`*mut T::write_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_unaligned
1923 [`*mut T::write_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_volatile
1924 [`*mut T::write`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write
1925 [`Box::leak`]: https://doc.rust-lang.org/std/boxed/struct.Box.html#method.leak
1926 [`FromUtf8Error::as_bytes`]: https://doc.rust-lang.org/std/string/struct.FromUtf8Error.html#method.as_bytes
1927 [`LocalKey::try_with`]: https://doc.rust-lang.org/std/thread/struct.LocalKey.html#method.try_with
1928 [`Option::cloned`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.cloned
1929 [`btree_map::Entry::and_modify`]: https://doc.rust-lang.org/std/collections/btree_map/enum.Entry.html#method.and_modify
1930 [`fs::read_to_string`]: https://doc.rust-lang.org/std/fs/fn.read_to_string.html
1931 [`fs::read`]: https://doc.rust-lang.org/std/fs/fn.read.html
1932 [`fs::write`]: https://doc.rust-lang.org/std/fs/fn.write.html
1933 [`hash_map::Entry::and_modify`]: https://doc.rust-lang.org/std/collections/hash_map/enum.Entry.html#method.and_modify
1934 [`iter::FusedIterator`]: https://doc.rust-lang.org/std/iter/trait.FusedIterator.html
1935 [`ops::RangeInclusive`]: https://doc.rust-lang.org/std/ops/struct.RangeInclusive.html
1936 [`ops::RangeToInclusive`]: https://doc.rust-lang.org/std/ops/struct.RangeToInclusive.html
1937 [`process::id`]: https://doc.rust-lang.org/std/process/fn.id.html
1938 [`slice::rotate_left`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rotate_left
1939 [`slice::rotate_right`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rotate_right
1940 [`String::retain`]: https://doc.rust-lang.org/std/string/struct.String.html#method.retain
1941 [cargo/5041]: https://github.com/rust-lang/cargo/pull/5041
1942 [cargo/5083]: https://github.com/rust-lang/cargo/pull/5083
1945 Version 1.25.0 (2018-03-29)
1946 ==========================
1950 - [The `#[repr(align(x))]` attribute is now stable.][47006] [RFC 1358]
1951 - [You can now use nested groups of imports.][47948]
1952 e.g. `use std::{fs::File, io::Read, path::{Path, PathBuf}};`
1953 - [You can now have `|` at the start of a match arm.][47947] e.g.
1955 enum Foo { A, B, C }
1961 | Foo::B => println!("AB"),
1962 | Foo::C => println!("C"),
1969 - [Upgraded to LLVM 6.][47828]
1970 - [Added `-C lto=val` option.][47521]
1971 - [Added `i586-unknown-linux-musl` target][47282]
1975 - [Impl Send for `process::Command` on Unix.][47760]
1976 - [Impl PartialEq and Eq for `ParseCharError`.][47790]
1977 - [`UnsafeCell::into_inner` is now safe.][47204]
1978 - [Implement libstd for CloudABI.][47268]
1979 - [`Float::{from_bits, to_bits}` is now available in libcore.][46931]
1980 - [Implement `AsRef<Path>` for Component][46985]
1981 - [Implemented `Write` for `Cursor<&mut Vec<u8>>`][46830]
1982 - [Moved `Duration` to libcore.][46666]
1986 - [`Location::column`]
1989 The following functions can now be used in a constant expression.
1990 eg. `static MINUTE: Duration = Duration::from_secs(60);`
1991 - [`Duration::new`][47300]
1992 - [`Duration::from_secs`][47300]
1993 - [`Duration::from_millis`][47300]
1997 - [`cargo new` no longer removes `rust` or `rs` prefixs/suffixs.][cargo/5013]
1998 - [`cargo new` now defaults to creating a binary crate, instead of a
1999 library crate.][cargo/5029]
2003 - [Rust by example is now shipped with new releases][46196]
2007 - [Deprecated `net::lookup_host`.][47510]
2008 - [`rustdoc` has switched to pulldown as the default markdown renderer.][47398]
2009 - The borrow checker was sometimes incorrectly permitting overlapping borrows
2010 around indexing operations (see [#47349][47349]). This has been fixed (which also
2011 enabled some correct code that used to cause errors (e.g. [#33903][33903] and [#46095][46095]).
2012 - [Removed deprecated unstable attribute `#[simd]`.][47251]
2014 [33903]: https://github.com/rust-lang/rust/pull/33903
2015 [47947]: https://github.com/rust-lang/rust/pull/47947
2016 [47948]: https://github.com/rust-lang/rust/pull/47948
2017 [47760]: https://github.com/rust-lang/rust/pull/47760
2018 [47790]: https://github.com/rust-lang/rust/pull/47790
2019 [47828]: https://github.com/rust-lang/rust/pull/47828
2020 [47398]: https://github.com/rust-lang/rust/pull/47398
2021 [47510]: https://github.com/rust-lang/rust/pull/47510
2022 [47521]: https://github.com/rust-lang/rust/pull/47521
2023 [47204]: https://github.com/rust-lang/rust/pull/47204
2024 [47251]: https://github.com/rust-lang/rust/pull/47251
2025 [47268]: https://github.com/rust-lang/rust/pull/47268
2026 [47282]: https://github.com/rust-lang/rust/pull/47282
2027 [47300]: https://github.com/rust-lang/rust/pull/47300
2028 [47349]: https://github.com/rust-lang/rust/pull/47349
2029 [46931]: https://github.com/rust-lang/rust/pull/46931
2030 [46985]: https://github.com/rust-lang/rust/pull/46985
2031 [47006]: https://github.com/rust-lang/rust/pull/47006
2032 [46830]: https://github.com/rust-lang/rust/pull/46830
2033 [46095]: https://github.com/rust-lang/rust/pull/46095
2034 [46666]: https://github.com/rust-lang/rust/pull/46666
2035 [46196]: https://github.com/rust-lang/rust/pull/46196
2036 [cargo/5013]: https://github.com/rust-lang/cargo/pull/5013
2037 [cargo/5029]: https://github.com/rust-lang/cargo/pull/5029
2038 [RFC 1358]: https://github.com/rust-lang/rfcs/pull/1358
2039 [`Location::column`]: https://doc.rust-lang.org/std/panic/struct.Location.html#method.column
2040 [`ptr::NonNull`]: https://doc.rust-lang.org/std/ptr/struct.NonNull.html
2043 Version 1.24.1 (2018-03-01)
2044 ==========================
2046 - [Do not abort when unwinding through FFI][48251]
2047 - [Emit UTF-16 files for linker arguments on Windows][48318]
2048 - [Make the error index generator work again][48308]
2049 - [Cargo will warn on Windows 7 if an update is needed][cargo/5069].
2051 [48251]: https://github.com/rust-lang/rust/issues/48251
2052 [48308]: https://github.com/rust-lang/rust/issues/48308
2053 [48318]: https://github.com/rust-lang/rust/issues/48318
2054 [cargo/5069]: https://github.com/rust-lang/cargo/pull/5069
2057 Version 1.24.0 (2018-02-15)
2058 ==========================
2062 - [External `sysv64` ffi is now available.][46528]
2063 eg. `extern "sysv64" fn foo () {}`
2067 - [rustc now uses 16 codegen units by default for release builds.][46910]
2068 For the fastest builds, utilize `codegen-units=1`.
2069 - [Added `armv4t-unknown-linux-gnueabi` target.][47018]
2070 - [Add `aarch64-unknown-openbsd` support][46760]
2074 - [`str::find::<char>` now uses memchr.][46735] This should lead to a 10x
2075 improvement in performance in the majority of cases.
2076 - [`OsStr`'s `Debug` implementation is now lossless and consistent
2077 with Windows.][46798]
2078 - [`time::{SystemTime, Instant}` now implement `Hash`.][46828]
2079 - [impl `From<bool>` for `AtomicBool`][46293]
2080 - [impl `From<{CString, &CStr}>` for `{Arc<CStr>, Rc<CStr>}`][45990]
2081 - [impl `From<{OsString, &OsStr}>` for `{Arc<OsStr>, Rc<OsStr>}`][45990]
2082 - [impl `From<{PathBuf, &Path}>` for `{Arc<Path>, Rc<Path>}`][45990]
2083 - [float::from_bits now just uses transmute.][46012] This provides
2084 some optimisations from LLVM.
2085 - [Copied `AsciiExt` methods onto `char`][46077]
2086 - [Remove `T: Sized` requirement on `ptr::is_null()`][46094]
2087 - [impl `From<RecvError>` for `{TryRecvError, RecvTimeoutError}`][45506]
2088 - [Optimised `f32::{min, max}` to generate more efficient x86 assembly][47080]
2089 - [`[u8]::contains` now uses memchr which provides a 3x speed improvement][46713]
2093 - [`RefCell::replace`]
2095 - [`atomic::spin_loop_hint`]
2097 The following functions can now be used in a constant expression.
2098 eg. `let buffer: [u8; size_of::<usize>()];`, `static COUNTER: AtomicUsize = AtomicUsize::new(1);`
2100 - [`AtomicBool::new`][46287]
2101 - [`AtomicUsize::new`][46287]
2102 - [`AtomicIsize::new`][46287]
2103 - [`AtomicPtr::new`][46287]
2104 - [`Cell::new`][46287]
2105 - [`{integer}::min_value`][46287]
2106 - [`{integer}::max_value`][46287]
2107 - [`mem::size_of`][46287]
2108 - [`mem::align_of`][46287]
2109 - [`ptr::null`][46287]
2110 - [`ptr::null_mut`][46287]
2111 - [`RefCell::new`][46287]
2112 - [`UnsafeCell::new`][46287]
2116 - [Added a `workspace.default-members` config that
2117 overrides implied `--all` in virtual workspaces.][cargo/4743]
2118 - [Enable incremental by default on development builds.][cargo/4817] Also added
2119 configuration keys to `Cargo.toml` and `.cargo/config` to disable on a
2120 per-project or global basis respectively.
2127 - [Floating point types `Debug` impl now always prints a decimal point.][46831]
2128 - [`Ipv6Addr` now rejects superfluous `::`'s in IPv6 addresses][46671] This is
2129 in accordance with IETF RFC 4291 §2.2.
2130 - [Unwinding will no longer go past FFI boundaries, and will instead abort.][46833]
2131 - [`Formatter::flags` method is now deprecated.][46284] The `sign_plus`,
2132 `sign_minus`, `alternate`, and `sign_aware_zero_pad` should be used instead.
2133 - [Leading zeros in tuple struct members is now an error][47084]
2134 - [`column!()` macro is one-based instead of zero-based][46977]
2135 - [`fmt::Arguments` can no longer be shared across threads][45198]
2136 - [Access to `#[repr(packed)]` struct fields is now unsafe][44884]
2137 - [Cargo sets a different working directory for the compiler][cargo/4788]
2139 [44884]: https://github.com/rust-lang/rust/pull/44884
2140 [45198]: https://github.com/rust-lang/rust/pull/45198
2141 [45506]: https://github.com/rust-lang/rust/pull/45506
2142 [45904]: https://github.com/rust-lang/rust/pull/45904
2143 [45990]: https://github.com/rust-lang/rust/pull/45990
2144 [46012]: https://github.com/rust-lang/rust/pull/46012
2145 [46077]: https://github.com/rust-lang/rust/pull/46077
2146 [46094]: https://github.com/rust-lang/rust/pull/46094
2147 [46284]: https://github.com/rust-lang/rust/pull/46284
2148 [46287]: https://github.com/rust-lang/rust/pull/46287
2149 [46293]: https://github.com/rust-lang/rust/pull/46293
2150 [46528]: https://github.com/rust-lang/rust/pull/46528
2151 [46671]: https://github.com/rust-lang/rust/pull/46671
2152 [46713]: https://github.com/rust-lang/rust/pull/46713
2153 [46735]: https://github.com/rust-lang/rust/pull/46735
2154 [46749]: https://github.com/rust-lang/rust/pull/46749
2155 [46760]: https://github.com/rust-lang/rust/pull/46760
2156 [46798]: https://github.com/rust-lang/rust/pull/46798
2157 [46828]: https://github.com/rust-lang/rust/pull/46828
2158 [46831]: https://github.com/rust-lang/rust/pull/46831
2159 [46833]: https://github.com/rust-lang/rust/pull/46833
2160 [46910]: https://github.com/rust-lang/rust/pull/46910
2161 [46977]: https://github.com/rust-lang/rust/pull/46977
2162 [47018]: https://github.com/rust-lang/rust/pull/47018
2163 [47080]: https://github.com/rust-lang/rust/pull/47080
2164 [47084]: https://github.com/rust-lang/rust/pull/47084
2165 [cargo/4743]: https://github.com/rust-lang/cargo/pull/4743
2166 [cargo/4788]: https://github.com/rust-lang/cargo/pull/4788
2167 [cargo/4817]: https://github.com/rust-lang/cargo/pull/4817
2168 [`RefCell::replace`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.replace
2169 [`RefCell::swap`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.swap
2170 [`atomic::spin_loop_hint`]: https://doc.rust-lang.org/std/sync/atomic/fn.spin_loop_hint.html
2173 Version 1.23.0 (2018-01-04)
2174 ==========================
2178 - [Arbitrary `auto` traits are now permitted in trait objects.][45772]
2179 - [rustc now uses subtyping on the left hand side of binary operations.][45435]
2180 Which should fix some confusing errors in some operations.
2184 - [Enabled `TrapUnreachable` in LLVM which should mitigate the impact of
2185 undefined behavior.][45920]
2186 - [rustc now suggests renaming import if names clash.][45660]
2187 - [Display errors/warnings correctly when there are zero-width or
2188 wide characters.][45711]
2189 - [rustc now avoids unnecessary copies of arguments that are
2190 simple bindings][45380] This should improve memory usage on average by 5-10%.
2191 - [Updated musl used to build musl rustc to 1.1.17][45393]
2195 - [Allow a trailing comma in `assert_eq/ne` macro][45887]
2196 - [Implement Hash for raw pointers to unsized types][45483]
2197 - [impl `From<*mut T>` for `AtomicPtr<T>`][45610]
2198 - [impl `From<usize/isize>` for `AtomicUsize/AtomicIsize`.][45610]
2199 - [Removed the `T: Sync` requirement for `RwLock<T>: Send`][45267]
2200 - [Removed `T: Sized` requirement for `{<*const T>, <*mut T>}::as_ref`
2201 and `<*mut T>::as_mut`][44932]
2202 - [Optimized `Thread::{park, unpark}` implementation][45524]
2203 - [Improved `SliceExt::binary_search` performance.][45333]
2204 - [impl `FromIterator<()>` for `()`][45379]
2205 - [Copied `AsciiExt` trait methods to primitive types.][44042] Use of `AsciiExt`
2213 - [Cargo now supports uninstallation of multiple packages][cargo/4561]
2214 eg. `cargo uninstall foo bar` uninstalls `foo` and `bar`.
2215 - [Added unit test checking to `cargo check`][cargo/4592]
2216 - [Cargo now lets you install a specific version
2217 using `cargo install --version`][cargo/4637]
2221 - [Releases now ship with the Cargo book documentation.][45692]
2222 - [rustdoc now prints rendering warnings on every run.][45324]
2226 - [Changes have been made to type equality to make it more correct,
2227 in rare cases this could break some code.][45853] [Tracking issue for
2228 further information][45852]
2229 - [`char::escape_debug` now uses Unicode 10 over 9.][45571]
2230 - [Upgraded Android SDK to 27, and NDK to r15c.][45580] This drops support for
2231 Android 9, the minimum supported version is Android 14.
2232 - [Bumped the minimum LLVM to 3.9][45326]
2234 [44042]: https://github.com/rust-lang/rust/pull/44042
2235 [44932]: https://github.com/rust-lang/rust/pull/44932
2236 [45267]: https://github.com/rust-lang/rust/pull/45267
2237 [45324]: https://github.com/rust-lang/rust/pull/45324
2238 [45326]: https://github.com/rust-lang/rust/pull/45326
2239 [45333]: https://github.com/rust-lang/rust/pull/45333
2240 [45379]: https://github.com/rust-lang/rust/pull/45379
2241 [45380]: https://github.com/rust-lang/rust/pull/45380
2242 [45393]: https://github.com/rust-lang/rust/pull/45393
2243 [45435]: https://github.com/rust-lang/rust/pull/45435
2244 [45483]: https://github.com/rust-lang/rust/pull/45483
2245 [45524]: https://github.com/rust-lang/rust/pull/45524
2246 [45571]: https://github.com/rust-lang/rust/pull/45571
2247 [45580]: https://github.com/rust-lang/rust/pull/45580
2248 [45610]: https://github.com/rust-lang/rust/pull/45610
2249 [45660]: https://github.com/rust-lang/rust/pull/45660
2250 [45692]: https://github.com/rust-lang/rust/pull/45692
2251 [45711]: https://github.com/rust-lang/rust/pull/45711
2252 [45772]: https://github.com/rust-lang/rust/pull/45772
2253 [45852]: https://github.com/rust-lang/rust/issues/45852
2254 [45853]: https://github.com/rust-lang/rust/pull/45853
2255 [45887]: https://github.com/rust-lang/rust/pull/45887
2256 [45920]: https://github.com/rust-lang/rust/pull/45920
2257 [cargo/4561]: https://github.com/rust-lang/cargo/pull/4561
2258 [cargo/4592]: https://github.com/rust-lang/cargo/pull/4592
2259 [cargo/4637]: https://github.com/rust-lang/cargo/pull/4637
2262 Version 1.22.1 (2017-11-22)
2263 ==========================
2265 - [Update Cargo to fix an issue with macOS 10.13 "High Sierra"][46183]
2267 [46183]: https://github.com/rust-lang/rust/pull/46183
2269 Version 1.22.0 (2017-11-22)
2270 ==========================
2274 - [`non_snake_case` lint now allows extern no-mangle functions][44966]
2275 - [Now accepts underscores in unicode escapes][43716]
2276 - [`T op= &T` now works for numeric types.][44287] eg. `let mut x = 2; x += &8;`
2277 - [types that impl `Drop` are now allowed in `const` and `static` types][44456]
2281 - [rustc now defaults to having 16 codegen units at debug on supported platforms.][45064]
2282 - [rustc will no longer inline in codegen units when compiling for debug][45075]
2283 This should decrease compile times for debug builds.
2284 - [strict memory alignment now enabled on ARMv6][45094]
2285 - [Remove support for the PNaCl target `le32-unknown-nacl`][45041]
2289 - [Allow atomic operations up to 32 bits
2290 on `armv5te_unknown_linux_gnueabi`][44978]
2291 - [`Box<Error>` now impls `From<Cow<str>>`][44466]
2292 - [`std::mem::Discriminant` is now guaranteed to be `Send + Sync`][45095]
2293 - [`fs::copy` now returns the length of the main stream on NTFS.][44895]
2294 - [Properly detect overflow in `Instant += Duration`.][44220]
2295 - [impl `Hasher` for `{&mut Hasher, Box<Hasher>}`][44015]
2296 - [impl `fmt::Debug` for `SplitWhitespace`.][44303]
2297 - [`Option<T>` now impls `Try`][42526] This allows for using `?` with `Option` types.
2304 - [Cargo will now build multi file examples in subdirectories of the `examples`
2305 folder that have a `main.rs` file.][cargo/4496]
2306 - [Changed `[root]` to `[package]` in `Cargo.lock`][cargo/4571] Packages with
2307 the old format will continue to work and can be updated with `cargo update`.
2308 - [Now supports vendoring git repositories][cargo/3992]
2312 - [`libbacktrace` is now available on Apple platforms.][44251]
2313 - [Stabilised the `compile_fail` attribute for code fences in doc-comments.][43949]
2314 This now lets you specify that a given code example will fail to compile.
2318 - [The minimum Android version that rustc can build for has been bumped
2319 to `4.0` from `2.3`][45656]
2320 - [Allowing `T op= &T` for numeric types has broken some type
2321 inference cases][45480]
2324 [42526]: https://github.com/rust-lang/rust/pull/42526
2325 [43017]: https://github.com/rust-lang/rust/pull/43017
2326 [43716]: https://github.com/rust-lang/rust/pull/43716
2327 [43949]: https://github.com/rust-lang/rust/pull/43949
2328 [44015]: https://github.com/rust-lang/rust/pull/44015
2329 [44220]: https://github.com/rust-lang/rust/pull/44220
2330 [44251]: https://github.com/rust-lang/rust/pull/44251
2331 [44287]: https://github.com/rust-lang/rust/pull/44287
2332 [44303]: https://github.com/rust-lang/rust/pull/44303
2333 [44456]: https://github.com/rust-lang/rust/pull/44456
2334 [44466]: https://github.com/rust-lang/rust/pull/44466
2335 [44895]: https://github.com/rust-lang/rust/pull/44895
2336 [44966]: https://github.com/rust-lang/rust/pull/44966
2337 [44978]: https://github.com/rust-lang/rust/pull/44978
2338 [45041]: https://github.com/rust-lang/rust/pull/45041
2339 [45064]: https://github.com/rust-lang/rust/pull/45064
2340 [45075]: https://github.com/rust-lang/rust/pull/45075
2341 [45094]: https://github.com/rust-lang/rust/pull/45094
2342 [45095]: https://github.com/rust-lang/rust/pull/45095
2343 [45480]: https://github.com/rust-lang/rust/issues/45480
2344 [45656]: https://github.com/rust-lang/rust/pull/45656
2345 [cargo/3992]: https://github.com/rust-lang/cargo/pull/3992
2346 [cargo/4496]: https://github.com/rust-lang/cargo/pull/4496
2347 [cargo/4571]: https://github.com/rust-lang/cargo/pull/4571
2354 Version 1.21.0 (2017-10-12)
2355 ==========================
2359 - [You can now use static references for literals.][43838]
2363 let x: &'static u32 = &0;
2366 - [Relaxed path syntax. Optional `::` before `<` is now allowed in all contexts.][43540]
2369 my_macro!(Vec<i32>::new); // Always worked
2370 my_macro!(Vec::<i32>::new); // Now works
2375 - [Upgraded jemalloc to 4.5.0][43911]
2376 - [Enabled unwinding panics on Redox][43917]
2377 - [Now runs LLVM in parallel during translation phase.][43506]
2378 This should reduce peak memory usage.
2382 - [Generate builtin impls for `Clone` for all arrays and tuples that
2383 are `T: Clone`][43690]
2384 - [`Stdin`, `Stdout`, and `Stderr` now implement `AsRawFd`.][43459]
2385 - [`Rc` and `Arc` now implement `From<&[T]> where T: Clone`, `From<str>`,
2386 `From<String>`, `From<Box<T>> where T: ?Sized`, and `From<Vec<T>>`.][42565]
2391 [`std::mem::discriminant`]
2395 - [You can now call `cargo install` with multiple package names][cargo/4216]
2396 - [Cargo commands inside a virtual workspace will now implicitly
2397 pass `--all`][cargo/4335]
2398 - [Added a `[patch]` section to `Cargo.toml` to handle
2399 prepublication dependencies][cargo/4123] [RFC 1969]
2400 - [`include` & `exclude` fields in `Cargo.toml` now accept gitignore
2401 like patterns][cargo/4270]
2402 - [Added the `--all-targets` option][cargo/4400]
2403 - [Using required dependencies as a feature is now deprecated and emits
2404 a warning][cargo/4364]
2409 - [Cargo docs are moving][43916]
2410 to [doc.rust-lang.org/cargo](https://doc.rust-lang.org/cargo)
2411 - [The rustdoc book is now available][43863]
2412 at [doc.rust-lang.org/rustdoc](https://doc.rust-lang.org/rustdoc)
2413 - [Added a preview of RLS has been made available through rustup][44204]
2414 Install with `rustup component add rls-preview`
2415 - [`std::os` documentation for Unix, Linux, and Windows now appears on doc.rust-lang.org][43348]
2416 Previously only showed `std::os::unix`.
2420 - [Changes in method matching against higher-ranked types][43880] This may cause
2421 breakage in subtyping corner cases. [A more in-depth explanation is available.][info/43880]
2422 - [rustc's JSON error output's byte position start at top of file.][42973]
2423 Was previously relative to the rustc's internal `CodeMap` struct which
2424 required the unstable library `libsyntax` to correctly use.
2425 - [`unused_results` lint no longer ignores booleans][43728]
2427 [42565]: https://github.com/rust-lang/rust/pull/42565
2428 [42973]: https://github.com/rust-lang/rust/pull/42973
2429 [43348]: https://github.com/rust-lang/rust/pull/43348
2430 [43459]: https://github.com/rust-lang/rust/pull/43459
2431 [43506]: https://github.com/rust-lang/rust/pull/43506
2432 [43540]: https://github.com/rust-lang/rust/pull/43540
2433 [43690]: https://github.com/rust-lang/rust/pull/43690
2434 [43728]: https://github.com/rust-lang/rust/pull/43728
2435 [43838]: https://github.com/rust-lang/rust/pull/43838
2436 [43863]: https://github.com/rust-lang/rust/pull/43863
2437 [43880]: https://github.com/rust-lang/rust/pull/43880
2438 [43911]: https://github.com/rust-lang/rust/pull/43911
2439 [43916]: https://github.com/rust-lang/rust/pull/43916
2440 [43917]: https://github.com/rust-lang/rust/pull/43917
2441 [44204]: https://github.com/rust-lang/rust/pull/44204
2442 [cargo/4123]: https://github.com/rust-lang/cargo/pull/4123
2443 [cargo/4216]: https://github.com/rust-lang/cargo/pull/4216
2444 [cargo/4270]: https://github.com/rust-lang/cargo/pull/4270
2445 [cargo/4335]: https://github.com/rust-lang/cargo/pull/4335
2446 [cargo/4364]: https://github.com/rust-lang/cargo/pull/4364
2447 [cargo/4400]: https://github.com/rust-lang/cargo/pull/4400
2448 [RFC 1969]: https://github.com/rust-lang/rfcs/pull/1969
2449 [info/43880]: https://github.com/rust-lang/rust/issues/44224#issuecomment-330058902
2450 [`std::mem::discriminant`]: https://doc.rust-lang.org/std/mem/fn.discriminant.html
2452 Version 1.20.0 (2017-08-31)
2453 ===========================
2457 - [Associated constants are now stabilised.][42809]
2458 - [A lot of macro bugs are now fixed.][42913]
2463 - [Struct fields are now properly coerced to the expected field type.][42807]
2464 - [Enabled wasm LLVM backend][42571] WASM can now be built with the
2465 `wasm32-experimental-emscripten` target.
2466 - [Changed some of the error messages to be more helpful.][42033]
2467 - [Add support for RELRO(RELocation Read-Only) for platforms that support
2469 - [rustc now reports the total number of errors on compilation failure][43015]
2470 previously this was only the number of errors in the pass that failed.
2471 - [Expansion in rustc has been sped up 29x.][42533]
2472 - [added `msp430-none-elf` target.][43099]
2473 - [rustc will now suggest one-argument enum variant to fix type mismatch when
2475 - [Fixes backtraces on Redox][43228]
2476 - [rustc now identifies different versions of same crate when absolute paths of
2477 different types match in an error message.][42826]
2483 - [Relaxed Debug constraints on `{HashMap,BTreeMap}::{Keys,Values}`.][42854]
2484 - [Impl `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Debug`, `Hash` for unsized
2486 - [Impl `fmt::{Display, Debug}` for `Ref`, `RefMut`, `MutexGuard`,
2487 `RwLockReadGuard`, `RwLockWriteGuard`][42822]
2488 - [Impl `Clone` for `DefaultHasher`.][42799]
2489 - [Impl `Sync` for `SyncSender`.][42397]
2490 - [Impl `FromStr` for `char`][42271]
2491 - [Fixed how `{f32, f64}::{is_sign_negative, is_sign_positive}` handles
2493 - [allow messages in the `unimplemented!()` macro.][42155]
2494 ie. `unimplemented!("Waiting for 1.21 to be stable")`
2495 - [`pub(restricted)` is now supported in the `thread_local!` macro.][43185]
2496 - [Upgrade to Unicode 10.0.0][42999]
2497 - [Reimplemented `{f32, f64}::{min, max}` in Rust instead of using CMath.][42430]
2498 - [Skip the main thread's manual stack guard on Linux][43072]
2499 - [Iterator::nth for `ops::{Range, RangeFrom}` is now done in O(1) time][43077]
2500 - [`#[repr(align(N))]` attribute max number is now 2^31 - 1.][43097] This was
2502 - [`{OsStr, Path}::Display` now avoids allocations where possible][42613]
2507 - [`CStr::into_c_string`]
2508 - [`CString::as_c_str`]
2509 - [`CString::into_boxed_c_str`]
2510 - [`Chain::get_mut`]
2511 - [`Chain::get_ref`]
2512 - [`Chain::into_inner`]
2513 - [`Option::get_or_insert_with`]
2514 - [`Option::get_or_insert`]
2515 - [`OsStr::into_os_string`]
2516 - [`OsString::into_boxed_os_str`]
2519 - [`Utf8Error::error_len`]
2520 - [`char::EscapeDebug`]
2521 - [`char::escape_debug`]
2522 - [`compile_error!`]
2523 - [`f32::from_bits`]
2525 - [`f64::from_bits`]
2527 - [`mem::ManuallyDrop`]
2528 - [`slice::sort_unstable_by_key`]
2529 - [`slice::sort_unstable_by`]
2530 - [`slice::sort_unstable`]
2531 - [`str::from_boxed_utf8_unchecked`]
2532 - [`str::as_bytes_mut`]
2533 - [`str::as_bytes_mut`]
2534 - [`str::from_utf8_mut`]
2535 - [`str::from_utf8_unchecked_mut`]
2537 - [`str::get_unchecked_mut`]
2538 - [`str::get_unchecked`]
2540 - [`str::into_boxed_bytes`]
2545 - [Cargo API token location moved from `~/.cargo/config` to
2546 `~/.cargo/credentials`.][cargo/3978]
2547 - [Cargo will now build `main.rs` binaries that are in sub-directories of
2548 `src/bin`.][cargo/4214] ie. Having `src/bin/server/main.rs` and
2549 `src/bin/client/main.rs` generates `target/debug/server` and `target/debug/client`
2550 - [You can now specify version of a binary when installed through
2551 `cargo install` using `--vers`.][cargo/4229]
2552 - [Added `--no-fail-fast` flag to cargo to run all benchmarks regardless of
2553 failure.][cargo/4248]
2554 - [Changed the convention around which file is the crate root.][cargo/4259]
2555 - [The `include`/`exclude` property in `Cargo.toml` now accepts gitignore paths
2556 instead of glob patterns][cargo/4270]. Glob patterns are now deprecated.
2561 - [Functions with `'static` in their return types will now not be as usable as
2562 if they were using lifetime parameters instead.][42417]
2563 - [The reimplementation of `{f32, f64}::is_sign_{negative, positive}` now
2564 takes the sign of NaN into account where previously didn't.][42430]
2566 [42033]: https://github.com/rust-lang/rust/pull/42033
2567 [42155]: https://github.com/rust-lang/rust/pull/42155
2568 [42271]: https://github.com/rust-lang/rust/pull/42271
2569 [42397]: https://github.com/rust-lang/rust/pull/42397
2570 [42417]: https://github.com/rust-lang/rust/pull/42417
2571 [42430]: https://github.com/rust-lang/rust/pull/42430
2572 [42431]: https://github.com/rust-lang/rust/pull/42431
2573 [42533]: https://github.com/rust-lang/rust/pull/42533
2574 [42571]: https://github.com/rust-lang/rust/pull/42571
2575 [42613]: https://github.com/rust-lang/rust/pull/42613
2576 [42799]: https://github.com/rust-lang/rust/pull/42799
2577 [42807]: https://github.com/rust-lang/rust/pull/42807
2578 [42809]: https://github.com/rust-lang/rust/pull/42809
2579 [42822]: https://github.com/rust-lang/rust/pull/42822
2580 [42826]: https://github.com/rust-lang/rust/pull/42826
2581 [42854]: https://github.com/rust-lang/rust/pull/42854
2582 [42913]: https://github.com/rust-lang/rust/pull/42913
2583 [42999]: https://github.com/rust-lang/rust/pull/42999
2584 [43011]: https://github.com/rust-lang/rust/pull/43011
2585 [43015]: https://github.com/rust-lang/rust/pull/43015
2586 [43072]: https://github.com/rust-lang/rust/pull/43072
2587 [43077]: https://github.com/rust-lang/rust/pull/43077
2588 [43097]: https://github.com/rust-lang/rust/pull/43097
2589 [43099]: https://github.com/rust-lang/rust/pull/43099
2590 [43170]: https://github.com/rust-lang/rust/pull/43170
2591 [43178]: https://github.com/rust-lang/rust/pull/43178
2592 [43185]: https://github.com/rust-lang/rust/pull/43185
2593 [43228]: https://github.com/rust-lang/rust/pull/43228
2594 [cargo/3978]: https://github.com/rust-lang/cargo/pull/3978
2595 [cargo/4214]: https://github.com/rust-lang/cargo/pull/4214
2596 [cargo/4229]: https://github.com/rust-lang/cargo/pull/4229
2597 [cargo/4248]: https://github.com/rust-lang/cargo/pull/4248
2598 [cargo/4259]: https://github.com/rust-lang/cargo/pull/4259
2599 [cargo/4270]: https://github.com/rust-lang/cargo/pull/4270
2600 [`CStr::into_c_string`]: https://doc.rust-lang.org/std/ffi/struct.CStr.html#method.into_c_string
2601 [`CString::as_c_str`]: https://doc.rust-lang.org/std/ffi/struct.CString.html#method.as_c_str
2602 [`CString::into_boxed_c_str`]: https://doc.rust-lang.org/std/ffi/struct.CString.html#method.into_boxed_c_str
2603 [`Chain::get_mut`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.get_mut
2604 [`Chain::get_ref`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.get_ref
2605 [`Chain::into_inner`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.into_inner
2606 [`Option::get_or_insert_with`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.get_or_insert_with
2607 [`Option::get_or_insert`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.get_or_insert
2608 [`OsStr::into_os_string`]: https://doc.rust-lang.org/std/ffi/struct.OsStr.html#method.into_os_string
2609 [`OsString::into_boxed_os_str`]: https://doc.rust-lang.org/std/ffi/struct.OsString.html#method.into_boxed_os_str
2610 [`Take::get_mut`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.get_mut
2611 [`Take::get_ref`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.get_ref
2612 [`Utf8Error::error_len`]: https://doc.rust-lang.org/std/str/struct.Utf8Error.html#method.error_len
2613 [`char::EscapeDebug`]: https://doc.rust-lang.org/std/char/struct.EscapeDebug.html
2614 [`char::escape_debug`]: https://doc.rust-lang.org/std/primitive.char.html#method.escape_debug
2615 [`compile_error!`]: https://doc.rust-lang.org/std/macro.compile_error.html
2616 [`f32::from_bits`]: https://doc.rust-lang.org/std/primitive.f32.html#method.from_bits
2617 [`f32::to_bits`]: https://doc.rust-lang.org/std/primitive.f32.html#method.to_bits
2618 [`f64::from_bits`]: https://doc.rust-lang.org/std/primitive.f64.html#method.from_bits
2619 [`f64::to_bits`]: https://doc.rust-lang.org/std/primitive.f64.html#method.to_bits
2620 [`mem::ManuallyDrop`]: https://doc.rust-lang.org/std/mem/union.ManuallyDrop.html
2621 [`slice::sort_unstable_by_key`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable_by_key
2622 [`slice::sort_unstable_by`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable_by
2623 [`slice::sort_unstable`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable
2624 [`str::from_boxed_utf8_unchecked`]: https://doc.rust-lang.org/std/str/fn.from_boxed_utf8_unchecked.html
2625 [`str::as_bytes_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.as_bytes_mut
2626 [`str::from_utf8_mut`]: https://doc.rust-lang.org/std/str/fn.from_utf8_mut.html
2627 [`str::from_utf8_unchecked_mut`]: https://doc.rust-lang.org/std/str/fn.from_utf8_unchecked_mut.html
2628 [`str::get_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_mut
2629 [`str::get_unchecked_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_unchecked_mut
2630 [`str::get_unchecked`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_unchecked
2631 [`str::get`]: https://doc.rust-lang.org/std/primitive.str.html#method.get
2632 [`str::into_boxed_bytes`]: https://doc.rust-lang.org/std/primitive.str.html#method.into_boxed_bytes
2635 Version 1.19.0 (2017-07-20)
2636 ===========================
2641 - [Numeric fields can now be used for creating tuple structs.][41145] [RFC 1506]
2642 For example `struct Point(u32, u32); let x = Point { 0: 7, 1: 0 };`.
2643 - [Macro recursion limit increased to 1024 from 64.][41676]
2644 - [Added lint for detecting unused macros.][41907]
2645 - [`loop` can now return a value with `break`.][42016] [RFC 1624]
2646 For example: `let x = loop { break 7; };`
2647 - [C compatible `union`s are now available.][42068] [RFC 1444] They can only
2648 contain `Copy` types and cannot have a `Drop` implementation.
2649 Example: `union Foo { bar: u8, baz: usize }`
2650 - [Non capturing closures can now be coerced into `fn`s,][42162] [RFC 1558]
2651 Example: `let foo: fn(u8) -> u8 = |v: u8| { v };`
2656 - [Add support for bootstrapping the Rust compiler toolchain on Android.][41370]
2657 - [Change `arm-linux-androideabi` to correspond to the `armeabi`
2658 official ABI.][41656] If you wish to continue targeting the `armeabi-v7a` ABI
2659 you should use `--target armv7-linux-androideabi`.
2660 - [Fixed ICE when removing a source file between compilation sessions.][41873]
2661 - [Minor optimisation of string operations.][42037]
2662 - [Compiler error message is now `aborting due to previous error(s)` instead of
2663 `aborting due to N previous errors`][42150] This was previously inaccurate and
2664 would only count certain kinds of errors.
2665 - [The compiler now supports Visual Studio 2017][42225]
2666 - [The compiler is now built against LLVM 4.0.1 by default][42948]
2667 - [Added a lot][42264] of [new error codes][42302]
2668 - [Added `target-feature=+crt-static` option][37406] [RFC 1721] Which allows
2669 libraries with C Run-time Libraries(CRT) to be statically linked.
2670 - [Fixed various ARM codegen bugs][42740]
2675 - [`String` now implements `FromIterator<Cow<'a, str>>` and
2676 `Extend<Cow<'a, str>>`][41449]
2677 - [`Vec` now implements `From<&mut [T]>`][41530]
2678 - [`Box<[u8]>` now implements `From<Box<str>>`][41258]
2679 - [`SplitWhitespace` now implements `Clone`][41659]
2680 - [`[u8]::reverse` is now 5x faster and `[u16]::reverse` is now
2682 - [`eprint!` and `eprintln!` macros added to prelude.][41192] Same as the `print!`
2683 macros, but for printing to stderr.
2688 - [`OsString::shrink_to_fit`]
2691 - [`thread::ThreadId`]
2696 - [Build scripts can now add environment variables to the environment
2697 the crate is being compiled in.
2698 Example: `println!("cargo:rustc-env=FOO=bar");`][cargo/3929]
2699 - [Subcommands now replace the current process rather than spawning a new
2700 child process][cargo/3970]
2701 - [Workspace members can now accept glob file patterns][cargo/3979]
2702 - [Added `--all` flag to the `cargo bench` subcommand to run benchmarks of all
2703 the members in a given workspace.][cargo/3988]
2704 - [Updated `libssh2-sys` to 0.2.6][cargo/4008]
2705 - [Target directory path is now in the cargo metadata][cargo/4022]
2706 - [Cargo no longer checks out a local working directory for the
2707 crates.io index][cargo/4026] This should provide smaller file size for the
2708 registry, and improve cloning times, especially on Windows machines.
2709 - [Added an `--exclude` option for excluding certain packages when using the
2710 `--all` option][cargo/4031]
2711 - [Cargo will now automatically retry when receiving a 5xx error
2712 from crates.io][cargo/4032]
2713 - [The `--features` option now accepts multiple comma or space
2714 delimited values.][cargo/4084]
2715 - [Added support for custom target specific runners][cargo/3954]
2720 - [Added `rust-windbg.cmd`][39983] for loading rust `.natvis` files in the
2722 - [Rust will now release XZ compressed packages][rust-installer/57]
2723 - [rustup will now prefer to download rust packages with
2724 XZ compression][rustup/1100] over GZip packages.
2725 - [Added the ability to escape `#` in rust documentation][41785] By adding
2726 additional `#`'s ie. `##` is now `#`
2731 - [`MutexGuard<T>` may only be `Sync` if `T` is `Sync`.][41624]
2732 - [`-Z` flags are now no longer allowed to be used on the stable
2733 compiler.][41751] This has been a warning for a year previous to this.
2734 - [As a result of the `-Z` flag change, the `cargo-check` plugin no
2735 longer works][42844]. Users should migrate to the built-in `check`
2736 command, which has been available since 1.16.
2737 - [Ending a float literal with `._` is now a hard error.
2738 Example: `42._` .][41946]
2739 - [Any use of a private `extern crate` outside of its module is now a
2740 hard error.][36886] This was previously a warning.
2741 - [`use ::self::foo;` is now a hard error.][36888] `self` paths are always
2742 relative while the `::` prefix makes a path absolute, but was ignored and the
2743 path was relative regardless.
2744 - [Floating point constants in match patterns is now a hard error][36890]
2745 This was previously a warning.
2746 - [Struct or enum constants that don't derive `PartialEq` & `Eq` used
2747 match patterns is now a hard error][36891] This was previously a warning.
2748 - [Lifetimes named `'_` are no longer allowed.][36892] This was previously
2750 - [From the pound escape, lines consisting of multiple `#`s are
2752 - [It is an error to re-export private enum variants][42460]. This is
2753 known to break a number of crates that depend on an older version of
2755 - [On Windows, if `VCINSTALLDIR` is set incorrectly, `rustc` will try
2756 to use it to find the linker, and the build will fail where it did
2757 not previously][42607]
2759 [36886]: https://github.com/rust-lang/rust/issues/36886
2760 [36888]: https://github.com/rust-lang/rust/issues/36888
2761 [36890]: https://github.com/rust-lang/rust/issues/36890
2762 [36891]: https://github.com/rust-lang/rust/issues/36891
2763 [36892]: https://github.com/rust-lang/rust/issues/36892
2764 [37406]: https://github.com/rust-lang/rust/issues/37406
2765 [39983]: https://github.com/rust-lang/rust/pull/39983
2766 [41145]: https://github.com/rust-lang/rust/pull/41145
2767 [41192]: https://github.com/rust-lang/rust/pull/41192
2768 [41258]: https://github.com/rust-lang/rust/pull/41258
2769 [41370]: https://github.com/rust-lang/rust/pull/41370
2770 [41449]: https://github.com/rust-lang/rust/pull/41449
2771 [41530]: https://github.com/rust-lang/rust/pull/41530
2772 [41624]: https://github.com/rust-lang/rust/pull/41624
2773 [41656]: https://github.com/rust-lang/rust/pull/41656
2774 [41659]: https://github.com/rust-lang/rust/pull/41659
2775 [41676]: https://github.com/rust-lang/rust/pull/41676
2776 [41751]: https://github.com/rust-lang/rust/pull/41751
2777 [41764]: https://github.com/rust-lang/rust/pull/41764
2778 [41785]: https://github.com/rust-lang/rust/pull/41785
2779 [41873]: https://github.com/rust-lang/rust/pull/41873
2780 [41907]: https://github.com/rust-lang/rust/pull/41907
2781 [41946]: https://github.com/rust-lang/rust/pull/41946
2782 [42016]: https://github.com/rust-lang/rust/pull/42016
2783 [42037]: https://github.com/rust-lang/rust/pull/42037
2784 [42068]: https://github.com/rust-lang/rust/pull/42068
2785 [42150]: https://github.com/rust-lang/rust/pull/42150
2786 [42162]: https://github.com/rust-lang/rust/pull/42162
2787 [42225]: https://github.com/rust-lang/rust/pull/42225
2788 [42264]: https://github.com/rust-lang/rust/pull/42264
2789 [42302]: https://github.com/rust-lang/rust/pull/42302
2790 [42460]: https://github.com/rust-lang/rust/issues/42460
2791 [42607]: https://github.com/rust-lang/rust/issues/42607
2792 [42740]: https://github.com/rust-lang/rust/pull/42740
2793 [42844]: https://github.com/rust-lang/rust/issues/42844
2794 [42948]: https://github.com/rust-lang/rust/pull/42948
2795 [RFC 1444]: https://github.com/rust-lang/rfcs/pull/1444
2796 [RFC 1506]: https://github.com/rust-lang/rfcs/pull/1506
2797 [RFC 1558]: https://github.com/rust-lang/rfcs/pull/1558
2798 [RFC 1624]: https://github.com/rust-lang/rfcs/pull/1624
2799 [RFC 1721]: https://github.com/rust-lang/rfcs/pull/1721
2800 [`Command::envs`]: https://doc.rust-lang.org/std/process/struct.Command.html#method.envs
2801 [`OsString::shrink_to_fit`]: https://doc.rust-lang.org/std/ffi/struct.OsString.html#method.shrink_to_fit
2802 [`cmp::Reverse`]: https://doc.rust-lang.org/std/cmp/struct.Reverse.html
2803 [`thread::ThreadId`]: https://doc.rust-lang.org/std/thread/struct.ThreadId.html
2804 [cargo/3929]: https://github.com/rust-lang/cargo/pull/3929
2805 [cargo/3954]: https://github.com/rust-lang/cargo/pull/3954
2806 [cargo/3970]: https://github.com/rust-lang/cargo/pull/3970
2807 [cargo/3979]: https://github.com/rust-lang/cargo/pull/3979
2808 [cargo/3988]: https://github.com/rust-lang/cargo/pull/3988
2809 [cargo/4008]: https://github.com/rust-lang/cargo/pull/4008
2810 [cargo/4022]: https://github.com/rust-lang/cargo/pull/4022
2811 [cargo/4026]: https://github.com/rust-lang/cargo/pull/4026
2812 [cargo/4031]: https://github.com/rust-lang/cargo/pull/4031
2813 [cargo/4032]: https://github.com/rust-lang/cargo/pull/4032
2814 [cargo/4084]: https://github.com/rust-lang/cargo/pull/4084
2815 [rust-installer/57]: https://github.com/rust-lang/rust-installer/pull/57
2816 [rustup/1100]: https://github.com/rust-lang-nursery/rustup.rs/pull/1100
2819 Version 1.18.0 (2017-06-08)
2820 ===========================
2825 - [Stabilize pub(restricted)][40556] `pub` can now accept a module path to
2826 make the item visible to just that module tree. Also accepts the keyword
2827 `crate` to make something public to the whole crate but not users of the
2828 library. Example: `pub(crate) mod utils;`. [RFC 1422].
2829 - [Stabilize `#![windows_subsystem]` attribute][40870] conservative exposure of the
2830 `/SUBSYSTEM` linker flag on Windows platforms. [RFC 1665].
2831 - [Refactor of trait object type parsing][40043] Now `ty` in macros can accept
2832 types like `Write + Send`, trailing `+` are now supported in trait objects,
2833 and better error reporting for trait objects starting with `?Sized`.
2834 - [0e+10 is now a valid floating point literal][40589]
2835 - [Now warns if you bind a lifetime parameter to 'static][40734]
2836 - [Tuples, Enum variant fields, and structs with no `repr` attribute or with
2837 `#[repr(Rust)]` are reordered to minimize padding and produce a smaller
2838 representation in some cases.][40377]
2843 - [rustc can now emit mir with `--emit mir`][39891]
2844 - [Improved LLVM IR for trivial functions][40367]
2845 - [Added explanation for E0090(Wrong number of lifetimes are supplied)][40723]
2846 - [rustc compilation is now 15%-20% faster][41469] Thanks to optimisation
2847 opportunities found through profiling
2848 - [Improved backtrace formatting when panicking][38165]
2853 - [Specialized `Vec::from_iter` being passed `vec::IntoIter`][40731] if the
2854 iterator hasn't been advanced the original `Vec` is reassembled with no actual
2855 iteration or reallocation.
2856 - [Simplified HashMap Bucket interface][40561] provides performance
2857 improvements for iterating and cloning.
2858 - [Specialize Vec::from_elem to use calloc][40409]
2859 - [Fixed Race condition in fs::create_dir_all][39799]
2860 - [No longer caching stdio on Windows][40516]
2861 - [Optimized insertion sort in slice][40807] insertion sort in some cases
2862 2.50%~ faster and in one case now 12.50% faster.
2863 - [Optimized `AtomicBool::fetch_nand`][41143]
2868 - [`Child::try_wait`]
2869 - [`HashMap::retain`]
2870 - [`HashSet::retain`]
2872 - [`TcpStream::peek`]
2873 - [`UdpSocket::peek`]
2874 - [`UdpSocket::peek_from`]
2879 - [Added partial Pijul support][cargo/3842] Pijul is a version control system in Rust.
2880 You can now create new cargo projects with Pijul using `cargo new --vcs pijul`
2881 - [Now always emits build script warnings for crates that fail to build][cargo/3847]
2882 - [Added Android build support][cargo/3885]
2883 - [Added `--bins` and `--tests` flags][cargo/3901] now you can build all programs
2884 of a certain type, for example `cargo build --bins` will build all
2886 - [Added support for haiku][cargo/3952]
2891 - [rustdoc can now use pulldown-cmark with the `--enable-commonmark` flag][40338]
2892 - [Added rust-windbg script for better debugging on Windows][39983]
2893 - [Rust now uses the official cross compiler for NetBSD][40612]
2894 - [rustdoc now accepts `#` at the start of files][40828]
2895 - [Fixed jemalloc support for musl][41168]
2900 - [Changes to how the `0` flag works in format!][40241] Padding zeroes are now
2901 always placed after the sign if it exists and before the digits. With the `#`
2902 flag the zeroes are placed after the prefix and before the digits.
2903 - [Due to the struct field optimisation][40377], using `transmute` on structs
2904 that have no `repr` attribute or `#[repr(Rust)]` will no longer work. This has
2905 always been undefined behavior, but is now more likely to break in practice.
2906 - [The refactor of trait object type parsing][40043] fixed a bug where `+` was
2907 receiving the wrong priority parsing things like `&for<'a> Tr<'a> + Send` as
2908 `&(for<'a> Tr<'a> + Send)` instead of `(&for<'a> Tr<'a>) + Send`
2909 - [Overlapping inherent `impl`s are now a hard error][40728]
2910 - [`PartialOrd` and `Ord` must agree on the ordering.][41270]
2911 - [`rustc main.rs -o out --emit=asm,llvm-ir`][41085] Now will output
2912 `out.asm` and `out.ll` instead of only one of the filetypes.
2913 - [ calling a function that returns `Self` will no longer work][41805] when
2914 the size of `Self` cannot be statically determined.
2915 - [rustc now builds with a "pthreads" flavour of MinGW for Windows GNU][40805]
2916 this has caused a few regressions namely:
2918 - Changed the link order of local static/dynamic libraries (respecting the
2919 order on given rather than having the compiler reorder).
2920 - Changed how MinGW is linked, native code linked to dynamic libraries
2921 may require manually linking to the gcc support library (for the native
2924 [38165]: https://github.com/rust-lang/rust/pull/38165
2925 [39799]: https://github.com/rust-lang/rust/pull/39799
2926 [39891]: https://github.com/rust-lang/rust/pull/39891
2927 [39983]: https://github.com/rust-lang/rust/pull/39983
2928 [40043]: https://github.com/rust-lang/rust/pull/40043
2929 [40241]: https://github.com/rust-lang/rust/pull/40241
2930 [40338]: https://github.com/rust-lang/rust/pull/40338
2931 [40367]: https://github.com/rust-lang/rust/pull/40367
2932 [40377]: https://github.com/rust-lang/rust/pull/40377
2933 [40409]: https://github.com/rust-lang/rust/pull/40409
2934 [40516]: https://github.com/rust-lang/rust/pull/40516
2935 [40556]: https://github.com/rust-lang/rust/pull/40556
2936 [40561]: https://github.com/rust-lang/rust/pull/40561
2937 [40589]: https://github.com/rust-lang/rust/pull/40589
2938 [40612]: https://github.com/rust-lang/rust/pull/40612
2939 [40723]: https://github.com/rust-lang/rust/pull/40723
2940 [40728]: https://github.com/rust-lang/rust/pull/40728
2941 [40731]: https://github.com/rust-lang/rust/pull/40731
2942 [40734]: https://github.com/rust-lang/rust/pull/40734
2943 [40805]: https://github.com/rust-lang/rust/pull/40805
2944 [40807]: https://github.com/rust-lang/rust/pull/40807
2945 [40828]: https://github.com/rust-lang/rust/pull/40828
2946 [40870]: https://github.com/rust-lang/rust/pull/40870
2947 [41085]: https://github.com/rust-lang/rust/pull/41085
2948 [41143]: https://github.com/rust-lang/rust/pull/41143
2949 [41168]: https://github.com/rust-lang/rust/pull/41168
2950 [41270]: https://github.com/rust-lang/rust/issues/41270
2951 [41469]: https://github.com/rust-lang/rust/pull/41469
2952 [41805]: https://github.com/rust-lang/rust/issues/41805
2953 [RFC 1422]: https://github.com/rust-lang/rfcs/blob/master/text/1422-pub-restricted.md
2954 [RFC 1665]: https://github.com/rust-lang/rfcs/blob/master/text/1665-windows-subsystem.md
2955 [`Child::try_wait`]: https://doc.rust-lang.org/std/process/struct.Child.html#method.try_wait
2956 [`HashMap::retain`]: https://doc.rust-lang.org/std/collections/struct.HashMap.html#method.retain
2957 [`HashSet::retain`]: https://doc.rust-lang.org/std/collections/struct.HashSet.html#method.retain
2958 [`PeekMut::pop`]: https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html#method.pop
2959 [`TcpStream::peek`]: https://doc.rust-lang.org/std/net/struct.TcpStream.html#method.peek
2960 [`UdpSocket::peek_from`]: https://doc.rust-lang.org/std/net/struct.UdpSocket.html#method.peek_from
2961 [`UdpSocket::peek`]: https://doc.rust-lang.org/std/net/struct.UdpSocket.html#method.peek
2962 [cargo/3842]: https://github.com/rust-lang/cargo/pull/3842
2963 [cargo/3847]: https://github.com/rust-lang/cargo/pull/3847
2964 [cargo/3885]: https://github.com/rust-lang/cargo/pull/3885
2965 [cargo/3901]: https://github.com/rust-lang/cargo/pull/3901
2966 [cargo/3952]: https://github.com/rust-lang/cargo/pull/3952
2969 Version 1.17.0 (2017-04-27)
2970 ===========================
2975 * [The lifetime of statics and consts defaults to `'static`][39265]. [RFC 1623]
2976 * [Fields of structs may be initialized without duplicating the field/variable
2977 names][39761]. [RFC 1682]
2978 * [`Self` may be included in the `where` clause of `impls`][38864]. [RFC 1647]
2979 * [When coercing to an unsized type lifetimes must be equal][40319]. That is,
2980 there is no subtyping between `T` and `U` when `T: Unsize<U>`. For example,
2981 coercing `&mut [&'a X; N]` to `&mut [&'b X]` requires `'a` be equal to
2982 `'b`. Soundness fix.
2983 * [Values passed to the indexing operator, `[]`, automatically coerce][40166]
2984 * [Static variables may contain references to other statics][40027]
2989 * [Exit quickly on only `--emit dep-info`][40336]
2990 * [Make `-C relocation-model` more correctly determine whether the linker
2991 creates a position-independent executable][40245]
2992 * [Add `-C overflow-checks` to directly control whether integer overflow
2994 * [The rustc type checker now checks items on demand instead of in a single
2995 in-order pass][40008]. This is mostly an internal refactoring in support of
2996 future work, including incremental type checking, but also resolves [RFC
2997 1647], allowing `Self` to appear in `impl` `where` clauses.
2998 * [Optimize vtable loads][39995]
2999 * [Turn off vectorization for Emscripten targets][39990]
3000 * [Provide suggestions for unknown macros imported with `use`][39953]
3001 * [Fix ICEs in path resolution][39939]
3002 * [Strip exception handling code on Emscripten when `panic=abort`][39193]
3003 * [Add clearer error message using `&str + &str`][39116]
3014 * [`Ordering::then`]
3015 * [`Ordering::then_with`]
3016 * [`BTreeMap::range`]
3017 * [`BTreeMap::range_mut`]
3018 * [`collections::Bound`]
3019 * [`process::abort`]
3020 * [`ptr::read_unaligned`]
3021 * [`ptr::write_unaligned`]
3022 * [`Result::expect_err`]
3025 * [`Cell::into_inner`]
3031 * [`BTreeMap` and `BTreeSet` can iterate over ranges][27787]
3032 * [`Cell` can store non-`Copy` types][39793]. [RFC 1651]
3033 * [`String` implements `FromIterator<&char>`][40028]
3034 * `Box` [implements][40009] a number of new conversions:
3035 `From<Box<str>> for String`,
3036 `From<Box<[T]>> for Vec<T>`,
3037 `From<Box<CStr>> for CString`,
3038 `From<Box<OsStr>> for OsString`,
3039 `From<Box<Path>> for PathBuf`,
3040 `Into<Box<str>> for String`,
3041 `Into<Box<[T]>> for Vec<T>`,
3042 `Into<Box<CStr>> for CString`,
3043 `Into<Box<OsStr>> for OsString`,
3044 `Into<Box<Path>> for PathBuf`,
3045 `Default for Box<str>`,
3046 `Default for Box<CStr>`,
3047 `Default for Box<OsStr>`,
3048 `From<&CStr> for Box<CStr>`,
3049 `From<&OsStr> for Box<OsStr>`,
3050 `From<&Path> for Box<Path>`
3051 * [`ffi::FromBytesWithNulError` implements `Error` and `Display`][39960]
3052 * [Specialize `PartialOrd<A> for [A] where A: Ord`][39642]
3053 * [Slightly optimize `slice::sort`][39538]
3054 * [Add `ToString` trait specialization for `Cow<'a, str>` and `String`][39440]
3055 * [`Box<[T]>` implements `From<&[T]> where T: Copy`,
3056 `Box<str>` implements `From<&str>`][39438]
3057 * [`IpAddr` implements `From` for various arrays. `SocketAddr` implements
3058 `From<(I, u16)> where I: Into<IpAddr>`][39372]
3059 * [`format!` estimates the needed capacity before writing a string][39356]
3060 * [Support unprivileged symlink creation in Windows][38921]
3061 * [`PathBuf` implements `Default`][38764]
3062 * [Implement `PartialEq<[A]>` for `VecDeque<A>`][38661]
3063 * [`HashMap` resizes adaptively][38368] to guard against DOS attacks
3064 and poor hash functions.
3069 * [Add `cargo check --all`][cargo/3731]
3070 * [Add an option to ignore SSL revocation checking][cargo/3699]
3071 * [Add `cargo run --package`][cargo/3691]
3072 * [Add `required_features`][cargo/3667]
3073 * [Assume `build.rs` is a build script][cargo/3664]
3074 * [Find workspace via `workspace_root` link in containing member][cargo/3562]
3079 * [Documentation is rendered with mdbook instead of the obsolete, in-tree
3081 * [The "Unstable Book" documents nightly-only features][ubook]
3082 * [Improve the style of the sidebar in rustdoc output][40265]
3083 * [Configure build correctly on 64-bit CPU's with the armhf ABI][40261]
3084 * [Fix MSP430 breakage due to `i128`][40257]
3085 * [Preliminary Solaris/SPARCv9 support][39903]
3086 * [`rustc` is linked statically on Windows MSVC targets][39837], allowing it to
3087 run without installing the MSVC runtime.
3088 * [`rustdoc --test` includes file names in test names][39788]
3089 * This release includes builds of `std` for `sparc64-unknown-linux-gnu`,
3090 `aarch64-unknown-linux-fuchsia`, and `x86_64-unknown-linux-fuchsia`.
3091 * [Initial support for `aarch64-unknown-freebsd`][39491]
3092 * [Initial support for `i686-unknown-netbsd`][39426]
3093 * [This release no longer includes the old makefile build system][39431]. Rust
3094 is built with a custom build system, written in Rust, and with Cargo.
3095 * [Add Debug implementations for libcollection structs][39002]
3096 * [`TypeId` implements `PartialOrd` and `Ord`][38981]
3097 * [`--test-threads=0` produces an error][38945]
3098 * [`rustup` installs documentation by default][40526]
3099 * [The Rust source includes NatVis visualizations][39843]. These can be used by
3100 WinDbg and Visual Studio to improve the debugging experience.
3105 * [Rust 1.17 does not correctly detect the MSVC 2017 linker][38584]. As a
3106 workaround, either use MSVC 2015 or run vcvars.bat.
3107 * [When coercing to an unsized type lifetimes must be equal][40319]. That is,
3108 disallow subtyping between `T` and `U` when `T: Unsize<U>`, e.g. coercing
3109 `&mut [&'a X; N]` to `&mut [&'b X]` requires `'a` be equal to `'b`. Soundness
3111 * [`format!` and `Display::to_string` panic if an underlying formatting
3112 implementation returns an error][40117]. Previously the error was silently
3113 ignored. It is incorrect for `write_fmt` to return an error when writing
3115 * [In-tree crates are verified to be unstable][39851]. Previously, some minor
3116 crates were marked stable and could be accessed from the stable toolchain.
3117 * [Rust git source no longer includes vendored crates][39728]. Those that need
3118 to build with vendored crates should build from release tarballs.
3119 * [Fix inert attributes from `proc_macro_derives`][39572]
3120 * [During crate resolution, rustc prefers a crate in the sysroot if two crates
3121 are otherwise identical][39518]. Unlikely to be encountered outside the Rust
3123 * [Fixed bugs around how type inference interacts with dead-code][39485]. The
3124 existing code generally ignores the type of dead-code unless a type-hint is
3125 provided; this can cause surprising inference interactions particularly around
3126 defaulting. The new code uniformly ignores the result type of dead-code.
3127 * [Tuple-struct constructors with private fields are no longer visible][38932]
3128 * [Lifetime parameters that do not appear in the arguments are now considered
3129 early-bound][38897], resolving a soundness bug (#[32330]). The
3130 `hr_lifetime_in_assoc_type` future-compatibility lint has been in effect since
3132 * [rustdoc: fix doctests with non-feature crate attributes][38161]
3133 * [Make transmuting from fn item types to pointer-sized types a hard
3136 [27787]: https://github.com/rust-lang/rust/issues/27787
3137 [32330]: https://github.com/rust-lang/rust/issues/32330
3138 [34198]: https://github.com/rust-lang/rust/pull/34198
3139 [38161]: https://github.com/rust-lang/rust/pull/38161
3140 [38368]: https://github.com/rust-lang/rust/pull/38368
3141 [38584]: https://github.com/rust-lang/rust/issues/38584
3142 [38661]: https://github.com/rust-lang/rust/pull/38661
3143 [38764]: https://github.com/rust-lang/rust/pull/38764
3144 [38864]: https://github.com/rust-lang/rust/issues/38864
3145 [38897]: https://github.com/rust-lang/rust/pull/38897
3146 [38921]: https://github.com/rust-lang/rust/pull/38921
3147 [38932]: https://github.com/rust-lang/rust/pull/38932
3148 [38945]: https://github.com/rust-lang/rust/pull/38945
3149 [38981]: https://github.com/rust-lang/rust/pull/38981
3150 [39002]: https://github.com/rust-lang/rust/pull/39002
3151 [39116]: https://github.com/rust-lang/rust/pull/39116
3152 [39193]: https://github.com/rust-lang/rust/pull/39193
3153 [39265]: https://github.com/rust-lang/rust/pull/39265
3154 [39356]: https://github.com/rust-lang/rust/pull/39356
3155 [39372]: https://github.com/rust-lang/rust/pull/39372
3156 [39426]: https://github.com/rust-lang/rust/pull/39426
3157 [39431]: https://github.com/rust-lang/rust/pull/39431
3158 [39438]: https://github.com/rust-lang/rust/pull/39438
3159 [39440]: https://github.com/rust-lang/rust/pull/39440
3160 [39485]: https://github.com/rust-lang/rust/pull/39485
3161 [39491]: https://github.com/rust-lang/rust/pull/39491
3162 [39518]: https://github.com/rust-lang/rust/pull/39518
3163 [39538]: https://github.com/rust-lang/rust/pull/39538
3164 [39572]: https://github.com/rust-lang/rust/pull/39572
3165 [39633]: https://github.com/rust-lang/rust/pull/39633
3166 [39642]: https://github.com/rust-lang/rust/pull/39642
3167 [39728]: https://github.com/rust-lang/rust/pull/39728
3168 [39761]: https://github.com/rust-lang/rust/pull/39761
3169 [39788]: https://github.com/rust-lang/rust/pull/39788
3170 [39793]: https://github.com/rust-lang/rust/pull/39793
3171 [39837]: https://github.com/rust-lang/rust/pull/39837
3172 [39843]: https://github.com/rust-lang/rust/pull/39843
3173 [39851]: https://github.com/rust-lang/rust/pull/39851
3174 [39903]: https://github.com/rust-lang/rust/pull/39903
3175 [39939]: https://github.com/rust-lang/rust/pull/39939
3176 [39953]: https://github.com/rust-lang/rust/pull/39953
3177 [39960]: https://github.com/rust-lang/rust/pull/39960
3178 [39990]: https://github.com/rust-lang/rust/pull/39990
3179 [39995]: https://github.com/rust-lang/rust/pull/39995
3180 [40008]: https://github.com/rust-lang/rust/pull/40008
3181 [40009]: https://github.com/rust-lang/rust/pull/40009
3182 [40027]: https://github.com/rust-lang/rust/pull/40027
3183 [40028]: https://github.com/rust-lang/rust/pull/40028
3184 [40037]: https://github.com/rust-lang/rust/pull/40037
3185 [40117]: https://github.com/rust-lang/rust/pull/40117
3186 [40166]: https://github.com/rust-lang/rust/pull/40166
3187 [40245]: https://github.com/rust-lang/rust/pull/40245
3188 [40257]: https://github.com/rust-lang/rust/pull/40257
3189 [40261]: https://github.com/rust-lang/rust/pull/40261
3190 [40265]: https://github.com/rust-lang/rust/pull/40265
3191 [40319]: https://github.com/rust-lang/rust/pull/40319
3192 [40336]: https://github.com/rust-lang/rust/pull/40336
3193 [40526]: https://github.com/rust-lang/rust/pull/40526
3194 [RFC 1623]: https://github.com/rust-lang/rfcs/blob/master/text/1623-static.md
3195 [RFC 1647]: https://github.com/rust-lang/rfcs/blob/master/text/1647-allow-self-in-where-clauses.md
3196 [RFC 1651]: https://github.com/rust-lang/rfcs/blob/master/text/1651-movecell.md
3197 [RFC 1682]: https://github.com/rust-lang/rfcs/blob/master/text/1682-field-init-shorthand.md
3198 [`Arc::from_raw`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.from_raw
3199 [`Arc::into_raw`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.into_raw
3200 [`Arc::ptr_eq`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.ptr_eq
3201 [`BTreeMap::range_mut`]: https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.range_mut
3202 [`BTreeMap::range`]: https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.range
3203 [`Cell::into_inner`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.into_inner
3204 [`Cell::replace`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.replace
3205 [`Cell::swap`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.swap
3206 [`Cell::take`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.take
3207 [`Ordering::then_with`]: https://doc.rust-lang.org/std/cmp/enum.Ordering.html#method.then_with
3208 [`Ordering::then`]: https://doc.rust-lang.org/std/cmp/enum.Ordering.html#method.then
3209 [`Rc::from_raw`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.from_raw
3210 [`Rc::into_raw`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.into_raw
3211 [`Rc::ptr_eq`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.ptr_eq
3212 [`Result::expect_err`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.expect_err
3213 [`collections::Bound`]: https://doc.rust-lang.org/std/collections/enum.Bound.html
3214 [`process::abort`]: https://doc.rust-lang.org/std/process/fn.abort.html
3215 [`ptr::read_unaligned`]: https://doc.rust-lang.org/std/ptr/fn.read_unaligned.html
3216 [`ptr::write_unaligned`]: https://doc.rust-lang.org/std/ptr/fn.write_unaligned.html
3217 [cargo/3562]: https://github.com/rust-lang/cargo/pull/3562
3218 [cargo/3664]: https://github.com/rust-lang/cargo/pull/3664
3219 [cargo/3667]: https://github.com/rust-lang/cargo/pull/3667
3220 [cargo/3691]: https://github.com/rust-lang/cargo/pull/3691
3221 [cargo/3699]: https://github.com/rust-lang/cargo/pull/3699
3222 [cargo/3731]: https://github.com/rust-lang/cargo/pull/3731
3223 [mdbook]: https://crates.io/crates/mdbook
3224 [ubook]: https://doc.rust-lang.org/unstable-book/
3227 Version 1.16.0 (2017-03-16)
3228 ===========================
3233 * [The compiler's `dead_code` lint now accounts for type aliases][38051].
3234 * [Uninhabitable enums (those without any variants) no longer permit wildcard
3235 match patterns][38069]
3236 * [Clean up semantics of `self` in an import list][38313]
3237 * [`Self` may appear in `impl` headers][38920]
3238 * [`Self` may appear in struct expressions][39282]
3243 * [`rustc` now supports `--emit=metadata`, which causes rustc to emit
3244 a `.rmeta` file containing only crate metadata][38571]. This can be
3245 used by tools like the Rust Language Service to perform
3246 metadata-only builds.
3247 * [Levenshtein based typo suggestions now work in most places, while
3248 previously they worked only for fields and sometimes for local
3249 variables][38927]. Together with the overhaul of "no
3250 resolution"/"unexpected resolution" errors (#[38154]) they result in
3251 large and systematic improvement in resolution diagnostics.
3252 * [Fix `transmute::<T, U>` where `T` requires a bigger alignment than
3254 * [rustc: use -Xlinker when specifying an rpath with ',' in it][38798]
3255 * [`rustc` no longer attempts to provide "consider using an explicit
3256 lifetime" suggestions][37057]. They were inaccurate.
3261 * [`VecDeque::truncate`]
3262 * [`VecDeque::resize`]
3263 * [`String::insert_str`]
3264 * [`Duration::checked_add`]
3265 * [`Duration::checked_sub`]
3266 * [`Duration::checked_div`]
3267 * [`Duration::checked_mul`]
3270 * [`SocketAddr::is_ipv4`]
3271 * [`SocketAddr::is_ipv6`]
3272 * [`IpAddr::is_ipv4`]
3273 * [`IpAddr::is_ipv6`]
3275 * [`Vec::dedup_by_key`]
3276 * [`Result::unwrap_or_default`]
3277 * [`<*const T>::wrapping_offset`]
3278 * [`<*mut T>::wrapping_offset`]
3279 * `CommandExt::creation_flags`
3280 * [`File::set_permissions`]
3281 * [`String::split_off`]
3286 * [`[T]::binary_search` and `[T]::binary_search_by_key` now take
3287 their argument by `Borrow` parameter][37761]
3288 * [All public types in std implement `Debug`][38006]
3289 * [`IpAddr` implements `From<Ipv4Addr>` and `From<Ipv6Addr>`][38327]
3290 * [`Ipv6Addr` implements `From<[u16; 8]>`][38131]
3291 * [Ctrl-Z returns from `Stdin.read()` when reading from the console on
3293 * [std: Fix partial writes in `LineWriter`][38062]
3294 * [std: Clamp max read/write sizes on Unix][38062]
3295 * [Use more specific panic message for `&str` slicing errors][38066]
3296 * [`TcpListener::set_only_v6` is deprecated][38304]. This
3297 functionality cannot be achieved in std currently.
3298 * [`writeln!`, like `println!`, now accepts a form with no string
3299 or formatting arguments, to just print a newline][38469]
3300 * [Implement `iter::Sum` and `iter::Product` for `Result`][38580]
3301 * [Reduce the size of static data in `std_unicode::tables`][38781]
3302 * [`char::EscapeDebug`, `EscapeDefault`, `EscapeUnicode`,
3303 `CaseMappingIter`, `ToLowercase`, `ToUppercase`, implement
3305 * [`Duration` implements `Sum`][38712]
3306 * [`String` implements `ToSocketAddrs`][39048]
3311 * [The `cargo check` command does a type check of a project without
3312 building it][cargo/3296]
3313 * [crates.io will display CI badges from Travis and AppVeyor, if
3314 specified in Cargo.toml][cargo/3546]
3315 * [crates.io will display categories listed in Cargo.toml][cargo/3301]
3316 * [Compilation profiles accept integer values for `debug`, in addition
3317 to `true` and `false`. These are passed to `rustc` as the value to
3318 `-C debuginfo`][cargo/3534]
3319 * [Implement `cargo --version --verbose`][cargo/3604]
3320 * [All builds now output 'dep-info' build dependencies compatible with
3321 make and ninja][cargo/3557]
3322 * [Build all workspace members with `build --all`][cargo/3511]
3323 * [Document all workspace members with `doc --all`][cargo/3515]
3324 * [Path deps outside workspace are not members][cargo/3443]
3329 * [`rustdoc` has a `--sysroot` argument that, like `rustc`, specifies
3330 the path to the Rust implementation][38589]
3331 * [The `armv7-linux-androideabi` target no longer enables NEON
3332 extensions, per Google's ABI guide][38413]
3333 * [The stock standard library can be compiled for Redox OS][38401]
3334 * [Rust has initial SPARC support][38726]. Tier 3. No builds
3336 * [Rust has experimental support for Nvidia PTX][38559]. Tier 3. No
3338 * [Fix backtraces on i686-pc-windows-gnu by disabling FPO][39379]
3343 * [Uninhabitable enums (those without any variants) no longer permit wildcard
3344 match patterns][38069]
3345 * In this release, references to uninhabited types can not be
3346 pattern-matched. This was accidentally allowed in 1.15.
3347 * [The compiler's `dead_code` lint now accounts for type aliases][38051].
3348 * [Ctrl-Z returns from `Stdin.read()` when reading from the console on
3350 * [Clean up semantics of `self` in an import list][38313]
3351 * Reimplemented lifetime elision. This change was almost entirely compatible
3352 with existing code, but it did close a number of small bugs and loopholes,
3353 as well as being more accepting in some other [cases][41105].
3355 [37057]: https://github.com/rust-lang/rust/pull/37057
3356 [37761]: https://github.com/rust-lang/rust/pull/37761
3357 [38006]: https://github.com/rust-lang/rust/pull/38006
3358 [38051]: https://github.com/rust-lang/rust/pull/38051
3359 [38062]: https://github.com/rust-lang/rust/pull/38062
3360 [38062]: https://github.com/rust-lang/rust/pull/38622
3361 [38066]: https://github.com/rust-lang/rust/pull/38066
3362 [38069]: https://github.com/rust-lang/rust/pull/38069
3363 [38131]: https://github.com/rust-lang/rust/pull/38131
3364 [38154]: https://github.com/rust-lang/rust/pull/38154
3365 [38274]: https://github.com/rust-lang/rust/pull/38274
3366 [38304]: https://github.com/rust-lang/rust/pull/38304
3367 [38313]: https://github.com/rust-lang/rust/pull/38313
3368 [38314]: https://github.com/rust-lang/rust/pull/38314
3369 [38327]: https://github.com/rust-lang/rust/pull/38327
3370 [38401]: https://github.com/rust-lang/rust/pull/38401
3371 [38413]: https://github.com/rust-lang/rust/pull/38413
3372 [38469]: https://github.com/rust-lang/rust/pull/38469
3373 [38559]: https://github.com/rust-lang/rust/pull/38559
3374 [38571]: https://github.com/rust-lang/rust/pull/38571
3375 [38580]: https://github.com/rust-lang/rust/pull/38580
3376 [38589]: https://github.com/rust-lang/rust/pull/38589
3377 [38670]: https://github.com/rust-lang/rust/pull/38670
3378 [38712]: https://github.com/rust-lang/rust/pull/38712
3379 [38726]: https://github.com/rust-lang/rust/pull/38726
3380 [38781]: https://github.com/rust-lang/rust/pull/38781
3381 [38798]: https://github.com/rust-lang/rust/pull/38798
3382 [38909]: https://github.com/rust-lang/rust/pull/38909
3383 [38920]: https://github.com/rust-lang/rust/pull/38920
3384 [38927]: https://github.com/rust-lang/rust/pull/38927
3385 [39048]: https://github.com/rust-lang/rust/pull/39048
3386 [39282]: https://github.com/rust-lang/rust/pull/39282
3387 [39379]: https://github.com/rust-lang/rust/pull/39379
3388 [41105]: https://github.com/rust-lang/rust/issues/41105
3389 [`<*const T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset
3390 [`<*mut T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset
3391 [`Duration::checked_add`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_add
3392 [`Duration::checked_div`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_div
3393 [`Duration::checked_mul`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_mul
3394 [`Duration::checked_sub`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_sub
3395 [`File::set_permissions`]: https://doc.rust-lang.org/std/fs/struct.File.html#method.set_permissions
3396 [`IpAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv4
3397 [`IpAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv6
3398 [`Result::unwrap_or_default`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.unwrap_or_default
3399 [`SocketAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv4
3400 [`SocketAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv6
3401 [`String::insert_str`]: https://doc.rust-lang.org/std/string/struct.String.html#method.insert_str
3402 [`String::split_off`]: https://doc.rust-lang.org/std/string/struct.String.html#method.split_off
3403 [`Vec::dedup_by_key`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by_key
3404 [`Vec::dedup_by`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by
3405 [`VecDeque::resize`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.resize
3406 [`VecDeque::truncate`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.truncate
3407 [`str::repeat`]: https://doc.rust-lang.org/std/primitive.str.html#method.repeat
3408 [`str::replacen`]: https://doc.rust-lang.org/std/primitive.str.html#method.replacen
3409 [cargo/3296]: https://github.com/rust-lang/cargo/pull/3296
3410 [cargo/3301]: https://github.com/rust-lang/cargo/pull/3301
3411 [cargo/3443]: https://github.com/rust-lang/cargo/pull/3443
3412 [cargo/3511]: https://github.com/rust-lang/cargo/pull/3511
3413 [cargo/3515]: https://github.com/rust-lang/cargo/pull/3515
3414 [cargo/3534]: https://github.com/rust-lang/cargo/pull/3534
3415 [cargo/3546]: https://github.com/rust-lang/cargo/pull/3546
3416 [cargo/3557]: https://github.com/rust-lang/cargo/pull/3557
3417 [cargo/3604]: https://github.com/rust-lang/cargo/pull/3604
3418 [RFC 1623]: https://github.com/rust-lang/rfcs/blob/master/text/1623-static.md
3421 Version 1.15.1 (2017-02-09)
3422 ===========================
3424 * [Fix IntoIter::as_mut_slice's signature][39466]
3425 * [Compile compiler builtins with `-fPIC` on 32-bit platforms][39523]
3427 [39466]: https://github.com/rust-lang/rust/pull/39466
3428 [39523]: https://github.com/rust-lang/rust/pull/39523
3431 Version 1.15.0 (2017-02-02)
3432 ===========================
3437 * Basic procedural macros allowing custom `#[derive]`, aka "macros 1.1", are
3438 stable. This allows popular code-generating crates like Serde and Diesel to
3439 work ergonomically. [RFC 1681].
3440 * [Tuple structs may be empty. Unary and empty tuple structs may be instantiated
3441 with curly braces][36868]. Part of [RFC 1506].
3442 * [A number of minor changes to name resolution have been activated][37127].
3443 They add up to more consistent semantics, allowing for future evolution of
3444 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
3445 details of what is different. The breaking changes here have been transitioned
3446 through the [`legacy_imports`] lint since 1.14, with no known regressions.
3447 * [In `macro_rules`, `path` fragments can now be parsed as type parameter
3449 * [`?Sized` can be used in `where` clauses][37791]
3450 * [There is now a limit on the size of monomorphized types and it can be
3451 modified with the `#![type_size_limit]` crate attribute, similarly to
3452 the `#![recursion_limit]` attribute][37789]
3457 * [On Windows, the compiler will apply dllimport attributes when linking to
3458 extern functions][37973]. Additional attributes and flags can control which
3459 library kind is linked and its name. [RFC 1717].
3460 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
3461 * [The `--test` flag works with procedural macro crates][38107]
3462 * [Fix `extern "aapcs" fn` ABI][37814]
3463 * [The `-C no-stack-check` flag is deprecated][37636]. It does nothing.
3464 * [The `format!` expander recognizes incorrect `printf` and shell-style
3465 formatting directives and suggests the correct format][37613].
3466 * [Only report one error for all unused imports in an import list][37456]
3468 Compiler Performance
3469 --------------------
3471 * [Avoid unnecessary `mk_ty` calls in `Ty::super_fold_with`][37705]
3472 * [Avoid more unnecessary `mk_ty` calls in `Ty::super_fold_with`][37979]
3473 * [Don't clone in `UnificationTable::probe`][37848]
3474 * [Remove `scope_auxiliary` to cut RSS by 10%][37764]
3475 * [Use small vectors in type walker][37760]
3476 * [Macro expansion performance was improved][37701]
3477 * [Change `HirVec<P<T>>` to `HirVec<T>` in `hir::Expr`][37642]
3478 * [Replace FNV with a faster hash function][37229]
3483 * [`std::iter::Iterator::min_by`]
3484 * [`std::iter::Iterator::max_by`]
3485 * [`std::os::*::fs::FileExt`]
3486 * [`std::sync::atomic::Atomic*::get_mut`]
3487 * [`std::sync::atomic::Atomic*::into_inner`]
3488 * [`std::vec::IntoIter::as_slice`]
3489 * [`std::vec::IntoIter::as_mut_slice`]
3490 * [`std::sync::mpsc::Receiver::try_iter`]
3491 * [`std::os::unix::process::CommandExt::before_exec`]
3492 * [`std::rc::Rc::strong_count`]
3493 * [`std::rc::Rc::weak_count`]
3494 * [`std::sync::Arc::strong_count`]
3495 * [`std::sync::Arc::weak_count`]
3496 * [`std::char::encode_utf8`]
3497 * [`std::char::encode_utf16`]
3498 * [`std::cell::Ref::clone`]
3499 * [`std::io::Take::into_inner`]
3504 * [The standard sorting algorithm has been rewritten for dramatic performance
3505 improvements][38192]. It is a hybrid merge sort, drawing influences from
3506 Timsort. Previously it was a naive merge sort.
3507 * [`Iterator::nth` no longer has a `Sized` bound][38134]
3508 * [`Extend<&T>` is specialized for `Vec` where `T: Copy`][38182] to improve
3510 * [`chars().count()` is much faster][37888] and so are [`chars().last()`
3511 and `char_indices().last()`][37882]
3512 * [Fix ARM Objective-C ABI in `std::env::args`][38146]
3513 * [Chinese characters display correctly in `fmt::Debug`][37855]
3514 * [Derive `Default` for `Duration`][37699]
3515 * [Support creation of anonymous pipes on WinXP/2k][37677]
3516 * [`mpsc::RecvTimeoutError` implements `Error`][37527]
3517 * [Don't pass overlapped handles to processes][38835]
3522 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
3523 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
3524 should instead check the variable at runtime with `std::env`. That the value
3525 was set at build time was a bug, and incorrect when cross-compiling. This
3526 change is known to cause breakage.
3527 * [Add `--all` flag to `cargo test`][cargo/3221]
3528 * [Compile statically against the MSVC CRT][cargo/3363]
3529 * [Mix feature flags into fingerprint/metadata shorthash][cargo/3102]
3530 * [Link OpenSSL statically on OSX][cargo/3311]
3531 * [Apply new fingerprinting to build dir outputs][cargo/3310]
3532 * [Test for bad path overrides with summaries][cargo/3336]
3533 * [Require `cargo install --vers` to take a semver version][cargo/3338]
3534 * [Fix retrying crate downloads for network errors][cargo/3348]
3535 * [Implement string lookup for `build.rustflags` config key][cargo/3356]
3536 * [Emit more info on --message-format=json][cargo/3319]
3537 * [Assume `build.rs` in the same directory as `Cargo.toml` is a build script][cargo/3361]
3538 * [Don't ignore errors in workspace manifest][cargo/3409]
3539 * [Fix `--message-format JSON` when rustc emits non-JSON warnings][cargo/3410]
3544 * [Test runners (binaries built with `--test`) now support a `--list` argument
3545 that lists the tests it contains][38185]
3546 * [Test runners now support a `--exact` argument that makes the test filter
3547 match exactly, instead of matching only a substring of the test name][38181]
3548 * [rustdoc supports a `--playground-url` flag][37763]
3549 * [rustdoc provides more details about `#[should_panic]` errors][37749]
3554 * [The Rust build system is now written in Rust][37817]. The Makefiles may
3555 continue to be used in this release by passing `--disable-rustbuild` to the
3556 configure script, but they will be deleted soon. Note that the new build
3557 system uses a different on-disk layout that will likely affect any scripts
3559 * [Rust supports i686-unknown-openbsd][38086]. Tier 3 support. No testing or
3561 * [Rust supports the MSP430][37627]. Tier 3 support. No testing or releases.
3562 * [Rust supports the ARMv5TE architecture][37615]. Tier 3 support. No testing or
3568 * [A number of minor changes to name resolution have been activated][37127].
3569 They add up to more consistent semantics, allowing for future evolution of
3570 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
3571 details of what is different. The breaking changes here have been transitioned
3572 through the [`legacy_imports`] lint since 1.14, with no known regressions.
3573 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
3574 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
3575 should instead check the variable at runtime with `std::env`. That the value
3576 was set at build time was a bug, and incorrect when cross-compiling. This
3577 change is known to cause breakage.
3578 * [Higher-ranked lifetimes are no longer allowed to appear _only_ in associated
3579 types][33685]. The [`hr_lifetime_in_assoc_type` lint] has been a warning since
3580 1.10 and is now an error by default. It will become a hard error in the near
3582 * [The semantics relating modules to file system directories are changing in
3583 minor ways][37602]. This is captured in the new `legacy_directory_ownership`
3584 lint, which is a warning in this release, and will become a hard error in the
3586 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
3587 * [Once `Peekable` peeks a `None` it will return that `None` without re-querying
3588 the underlying iterator][37834]
3590 ["changes"]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md#changes-to-name-resolution-rules
3591 [33685]: https://github.com/rust-lang/rust/issues/33685
3592 [36868]: https://github.com/rust-lang/rust/pull/36868
3593 [37127]: https://github.com/rust-lang/rust/pull/37127
3594 [37229]: https://github.com/rust-lang/rust/pull/37229
3595 [37456]: https://github.com/rust-lang/rust/pull/37456
3596 [37527]: https://github.com/rust-lang/rust/pull/37527
3597 [37602]: https://github.com/rust-lang/rust/pull/37602
3598 [37613]: https://github.com/rust-lang/rust/pull/37613
3599 [37615]: https://github.com/rust-lang/rust/pull/37615
3600 [37636]: https://github.com/rust-lang/rust/pull/37636
3601 [37627]: https://github.com/rust-lang/rust/pull/37627
3602 [37642]: https://github.com/rust-lang/rust/pull/37642
3603 [37677]: https://github.com/rust-lang/rust/pull/37677
3604 [37699]: https://github.com/rust-lang/rust/pull/37699
3605 [37701]: https://github.com/rust-lang/rust/pull/37701
3606 [37705]: https://github.com/rust-lang/rust/pull/37705
3607 [37749]: https://github.com/rust-lang/rust/pull/37749
3608 [37760]: https://github.com/rust-lang/rust/pull/37760
3609 [37763]: https://github.com/rust-lang/rust/pull/37763
3610 [37764]: https://github.com/rust-lang/rust/pull/37764
3611 [37789]: https://github.com/rust-lang/rust/pull/37789
3612 [37791]: https://github.com/rust-lang/rust/pull/37791
3613 [37814]: https://github.com/rust-lang/rust/pull/37814
3614 [37817]: https://github.com/rust-lang/rust/pull/37817
3615 [37834]: https://github.com/rust-lang/rust/pull/37834
3616 [37848]: https://github.com/rust-lang/rust/pull/37848
3617 [37855]: https://github.com/rust-lang/rust/pull/37855
3618 [37882]: https://github.com/rust-lang/rust/pull/37882
3619 [37888]: https://github.com/rust-lang/rust/pull/37888
3620 [37973]: https://github.com/rust-lang/rust/pull/37973
3621 [37979]: https://github.com/rust-lang/rust/pull/37979
3622 [38086]: https://github.com/rust-lang/rust/pull/38086
3623 [38107]: https://github.com/rust-lang/rust/pull/38107
3624 [38117]: https://github.com/rust-lang/rust/pull/38117
3625 [38134]: https://github.com/rust-lang/rust/pull/38134
3626 [38146]: https://github.com/rust-lang/rust/pull/38146
3627 [38181]: https://github.com/rust-lang/rust/pull/38181
3628 [38182]: https://github.com/rust-lang/rust/pull/38182
3629 [38185]: https://github.com/rust-lang/rust/pull/38185
3630 [38192]: https://github.com/rust-lang/rust/pull/38192
3631 [38279]: https://github.com/rust-lang/rust/pull/38279
3632 [38835]: https://github.com/rust-lang/rust/pull/38835
3633 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
3634 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
3635 [RFC 1560]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md
3636 [RFC 1681]: https://github.com/rust-lang/rfcs/blob/master/text/1681-macros-1.1.md
3637 [RFC 1717]: https://github.com/rust-lang/rfcs/blob/master/text/1717-dllimport.md
3638 [`hr_lifetime_in_assoc_type` lint]: https://github.com/rust-lang/rust/issues/33685
3639 [`legacy_imports`]: https://github.com/rust-lang/rust/pull/38271
3640 [cargo/3102]: https://github.com/rust-lang/cargo/pull/3102
3641 [cargo/3221]: https://github.com/rust-lang/cargo/pull/3221
3642 [cargo/3310]: https://github.com/rust-lang/cargo/pull/3310
3643 [cargo/3311]: https://github.com/rust-lang/cargo/pull/3311
3644 [cargo/3319]: https://github.com/rust-lang/cargo/pull/3319
3645 [cargo/3336]: https://github.com/rust-lang/cargo/pull/3336
3646 [cargo/3338]: https://github.com/rust-lang/cargo/pull/3338
3647 [cargo/3348]: https://github.com/rust-lang/cargo/pull/3348
3648 [cargo/3356]: https://github.com/rust-lang/cargo/pull/3356
3649 [cargo/3361]: https://github.com/rust-lang/cargo/pull/3361
3650 [cargo/3363]: https://github.com/rust-lang/cargo/pull/3363
3651 [cargo/3368]: https://github.com/rust-lang/cargo/issues/3368
3652 [cargo/3409]: https://github.com/rust-lang/cargo/pull/3409
3653 [cargo/3410]: https://github.com/rust-lang/cargo/pull/3410
3654 [`std::iter::Iterator::min_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.min_by
3655 [`std::iter::Iterator::max_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.max_by
3656 [`std::os::*::fs::FileExt`]: https://doc.rust-lang.org/std/os/unix/fs/trait.FileExt.html
3657 [`std::sync::atomic::Atomic*::get_mut`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.get_mut
3658 [`std::sync::atomic::Atomic*::into_inner`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.into_inner
3659 [`std::vec::IntoIter::as_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_slice
3660 [`std::vec::IntoIter::as_mut_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_mut_slice
3661 [`std::sync::mpsc::Receiver::try_iter`]: https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.try_iter
3662 [`std::os::unix::process::CommandExt::before_exec`]: https://doc.rust-lang.org/std/os/unix/process/trait.CommandExt.html#tymethod.before_exec
3663 [`std::rc::Rc::strong_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.strong_count
3664 [`std::rc::Rc::weak_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.weak_count
3665 [`std::sync::Arc::strong_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.strong_count
3666 [`std::sync::Arc::weak_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.weak_count
3667 [`std::char::encode_utf8`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf8
3668 [`std::char::encode_utf16`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf16
3669 [`std::cell::Ref::clone`]: https://doc.rust-lang.org/std/cell/struct.Ref.html#method.clone
3670 [`std::io::Take::into_inner`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.into_inner
3673 Version 1.14.0 (2016-12-22)
3674 ===========================
3679 * [`..` matches multiple tuple fields in enum variants, structs
3680 and tuples][36843]. [RFC 1492].
3681 * [Safe `fn` items can be coerced to `unsafe fn` pointers][37389]
3682 * [`use *` and `use ::*` both glob-import from the crate root][37367]
3683 * [It's now possible to call a `Vec<Box<Fn()>>` without explicit
3684 dereferencing][36822]
3689 * [Mark enums with non-zero discriminant as non-zero][37224]
3690 * [Lower-case `static mut` names are linted like other
3691 statics and consts][37162]
3692 * [Fix ICE on some macros in const integer positions
3693 (e.g. `[u8; m!()]`)][36819]
3694 * [Improve error message and snippet for "did you mean `x`"][36798]
3695 * [Add a panic-strategy field to the target specification][36794]
3696 * [Include LLVM version in `--version --verbose`][37200]
3698 Compile-time Optimizations
3699 --------------------------
3701 * [Improve macro expansion performance][37569]
3702 * [Shrink `Expr_::ExprInlineAsm`][37445]
3703 * [Replace all uses of SHA-256 with BLAKE2b][37439]
3704 * [Reduce the number of bytes hashed by `IchHasher`][37427]
3705 * [Avoid more allocations when compiling html5ever][37373]
3706 * [Use `SmallVector` in `CombineFields::instantiate`][37322]
3707 * [Avoid some allocations in the macro parser][37318]
3708 * [Use a faster deflate setting][37298]
3709 * [Add `ArrayVec` and `AccumulateVec` to reduce heap allocations
3710 during interning of slices][37270]
3711 * [Optimize `write_metadata`][37267]
3712 * [Don't process obligation forest cycles when stalled][37231]
3713 * [Avoid many `CrateConfig` clones][37161]
3714 * [Optimize `Substs::super_fold_with`][37108]
3715 * [Optimize `ObligationForest`'s `NodeState` handling][36993]
3716 * [Speed up `plug_leaks`][36917]
3721 * [`println!()`, with no arguments, prints newline][36825].
3722 Previously, an empty string was required to achieve the same.
3723 * [`Wrapping` impls standard binary and unary operators, as well as
3724 the `Sum` and `Product` iterators][37356]
3725 * [Implement `From<Cow<str>> for String` and `From<Cow<[T]>> for
3727 * [Improve `fold` performance for `chain`, `cloned`, `map`, and
3728 `VecDeque` iterators][37315]
3729 * [Improve `SipHasher` performance on small values][37312]
3730 * [Add Iterator trait TrustedLen to enable better FromIterator /
3732 * [Expand `.zip()` specialization to `.map()` and `.cloned()`][37230]
3733 * [`ReadDir` implements `Debug`][37221]
3734 * [Implement `RefUnwindSafe` for atomic types][37178]
3735 * [Specialize `Vec::extend` to `Vec::extend_from_slice`][37094]
3736 * [Avoid allocations in `Decoder::read_str`][37064]
3737 * [`io::Error` implements `From<io::ErrorKind>`][37037]
3738 * [Impl `Debug` for raw pointers to unsized data][36880]
3739 * [Don't reuse `HashMap` random seeds][37470]
3740 * [The internal memory layout of `HashMap` is more cache-friendly, for
3741 significant improvements in some operations][36692]
3742 * [`HashMap` uses less memory on 32-bit architectures][36595]
3743 * [Impl `Add<{str, Cow<str>}>` for `Cow<str>`][36430]
3748 * [Expose rustc cfg values to build scripts][cargo/3243]
3749 * [Allow cargo to work with read-only `CARGO_HOME`][cargo/3259]
3750 * [Fix passing --features when testing multiple packages][cargo/3280]
3751 * [Use a single profile set per workspace][cargo/3249]
3752 * [Load `replace` sections from lock files][cargo/3220]
3753 * [Ignore `panic` configuration for test/bench profiles][cargo/3175]
3758 * [rustup is the recommended Rust installation method][1.14rustup]
3759 * This release includes host (rustc) builds for Linux on MIPS, PowerPC, and
3760 S390x. These are [tier 2] platforms and may have major defects. Follow the
3761 instructions on the website to install, or add the targets to an existing
3762 installation with `rustup target add`. The new target triples are:
3763 - `mips-unknown-linux-gnu`
3764 - `mipsel-unknown-linux-gnu`
3765 - `mips64-unknown-linux-gnuabi64`
3766 - `mips64el-unknown-linux-gnuabi64 `
3767 - `powerpc-unknown-linux-gnu`
3768 - `powerpc64-unknown-linux-gnu`
3769 - `powerpc64le-unknown-linux-gnu`
3770 - `s390x-unknown-linux-gnu `
3771 * This release includes target (std) builds for ARM Linux running MUSL
3772 libc. These are [tier 2] platforms and may have major defects. Add the
3773 following triples to an existing rustup installation with `rustup target add`:
3774 - `arm-unknown-linux-musleabi`
3775 - `arm-unknown-linux-musleabihf`
3776 - `armv7-unknown-linux-musleabihf`
3777 * This release includes [experimental support for WebAssembly][1.14wasm], via
3778 the `wasm32-unknown-emscripten` target. This target is known to have major
3779 defects. Please test, report, and fix.
3780 * rustup no longer installs documentation by default. Run `rustup
3781 component add rust-docs` to install.
3782 * [Fix line stepping in debugger][37310]
3783 * [Enable line number debuginfo in releases][37280]
3788 * [Disable jemalloc on aarch64/powerpc/mips][37392]
3789 * [Add support for Fuchsia OS][37313]
3790 * [Detect local-rebuild by only MAJOR.MINOR version][37273]
3795 * [A number of forward-compatibility lints used by the compiler
3796 to gradually introduce language changes have been converted
3797 to deny by default][36894]:
3798 - ["use of inaccessible extern crate erroneously allowed"][36886]
3799 - ["type parameter default erroneously allowed in invalid location"][36887]
3800 - ["detects super or self keywords at the beginning of global path"][36888]
3801 - ["two overlapping inherent impls define an item with the same name
3802 were erroneously allowed"][36889]
3803 - ["floating-point constants cannot be used in patterns"][36890]
3804 - ["constants of struct or enum type can only be used in a pattern if
3805 the struct or enum has `#[derive(PartialEq, Eq)]`"][36891]
3806 - ["lifetimes or labels named `'_` were erroneously allowed"][36892]
3807 * [Prohibit patterns in trait methods without bodies][37378]
3808 * [The atomic `Ordering` enum may not be matched exhaustively][37351]
3809 * [Future-proofing `#[no_link]` breaks some obscure cases][37247]
3810 * [The `$crate` macro variable is accepted in fewer locations][37213]
3811 * [Impls specifying extra region requirements beyond the trait
3812 they implement are rejected][37167]
3813 * [Enums may not be unsized][37111]. Unsized enums are intended to
3814 work but never have. For now they are forbidden.
3815 * [Enforce the shadowing restrictions from RFC 1560 for today's macros][36767]
3817 [tier 2]: https://forge.rust-lang.org/platform-support.html
3818 [1.14rustup]: https://internals.rust-lang.org/t/beta-testing-rustup-rs/3316/204
3819 [1.14wasm]: https://users.rust-lang.org/t/compiling-to-the-web-with-rust-and-emscripten/7627
3820 [36430]: https://github.com/rust-lang/rust/pull/36430
3821 [36595]: https://github.com/rust-lang/rust/pull/36595
3822 [36595]: https://github.com/rust-lang/rust/pull/36595
3823 [36692]: https://github.com/rust-lang/rust/pull/36692
3824 [36767]: https://github.com/rust-lang/rust/pull/36767
3825 [36794]: https://github.com/rust-lang/rust/pull/36794
3826 [36798]: https://github.com/rust-lang/rust/pull/36798
3827 [36819]: https://github.com/rust-lang/rust/pull/36819
3828 [36822]: https://github.com/rust-lang/rust/pull/36822
3829 [36825]: https://github.com/rust-lang/rust/pull/36825
3830 [36843]: https://github.com/rust-lang/rust/pull/36843
3831 [36880]: https://github.com/rust-lang/rust/pull/36880
3832 [36886]: https://github.com/rust-lang/rust/issues/36886
3833 [36887]: https://github.com/rust-lang/rust/issues/36887
3834 [36888]: https://github.com/rust-lang/rust/issues/36888
3835 [36889]: https://github.com/rust-lang/rust/issues/36889
3836 [36890]: https://github.com/rust-lang/rust/issues/36890
3837 [36891]: https://github.com/rust-lang/rust/issues/36891
3838 [36892]: https://github.com/rust-lang/rust/issues/36892
3839 [36894]: https://github.com/rust-lang/rust/pull/36894
3840 [36917]: https://github.com/rust-lang/rust/pull/36917
3841 [36993]: https://github.com/rust-lang/rust/pull/36993
3842 [37037]: https://github.com/rust-lang/rust/pull/37037
3843 [37064]: https://github.com/rust-lang/rust/pull/37064
3844 [37094]: https://github.com/rust-lang/rust/pull/37094
3845 [37108]: https://github.com/rust-lang/rust/pull/37108
3846 [37111]: https://github.com/rust-lang/rust/pull/37111
3847 [37161]: https://github.com/rust-lang/rust/pull/37161
3848 [37162]: https://github.com/rust-lang/rust/pull/37162
3849 [37167]: https://github.com/rust-lang/rust/pull/37167
3850 [37178]: https://github.com/rust-lang/rust/pull/37178
3851 [37200]: https://github.com/rust-lang/rust/pull/37200
3852 [37213]: https://github.com/rust-lang/rust/pull/37213
3853 [37221]: https://github.com/rust-lang/rust/pull/37221
3854 [37224]: https://github.com/rust-lang/rust/pull/37224
3855 [37230]: https://github.com/rust-lang/rust/pull/37230
3856 [37231]: https://github.com/rust-lang/rust/pull/37231
3857 [37247]: https://github.com/rust-lang/rust/pull/37247
3858 [37267]: https://github.com/rust-lang/rust/pull/37267
3859 [37270]: https://github.com/rust-lang/rust/pull/37270
3860 [37273]: https://github.com/rust-lang/rust/pull/37273
3861 [37280]: https://github.com/rust-lang/rust/pull/37280
3862 [37298]: https://github.com/rust-lang/rust/pull/37298
3863 [37306]: https://github.com/rust-lang/rust/pull/37306
3864 [37310]: https://github.com/rust-lang/rust/pull/37310
3865 [37312]: https://github.com/rust-lang/rust/pull/37312
3866 [37313]: https://github.com/rust-lang/rust/pull/37313
3867 [37315]: https://github.com/rust-lang/rust/pull/37315
3868 [37318]: https://github.com/rust-lang/rust/pull/37318
3869 [37322]: https://github.com/rust-lang/rust/pull/37322
3870 [37326]: https://github.com/rust-lang/rust/pull/37326
3871 [37351]: https://github.com/rust-lang/rust/pull/37351
3872 [37356]: https://github.com/rust-lang/rust/pull/37356
3873 [37367]: https://github.com/rust-lang/rust/pull/37367
3874 [37373]: https://github.com/rust-lang/rust/pull/37373
3875 [37378]: https://github.com/rust-lang/rust/pull/37378
3876 [37389]: https://github.com/rust-lang/rust/pull/37389
3877 [37392]: https://github.com/rust-lang/rust/pull/37392
3878 [37427]: https://github.com/rust-lang/rust/pull/37427
3879 [37439]: https://github.com/rust-lang/rust/pull/37439
3880 [37445]: https://github.com/rust-lang/rust/pull/37445
3881 [37470]: https://github.com/rust-lang/rust/pull/37470
3882 [37569]: https://github.com/rust-lang/rust/pull/37569
3883 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
3884 [cargo/3175]: https://github.com/rust-lang/cargo/pull/3175
3885 [cargo/3220]: https://github.com/rust-lang/cargo/pull/3220
3886 [cargo/3243]: https://github.com/rust-lang/cargo/pull/3243
3887 [cargo/3249]: https://github.com/rust-lang/cargo/pull/3249
3888 [cargo/3259]: https://github.com/rust-lang/cargo/pull/3259
3889 [cargo/3280]: https://github.com/rust-lang/cargo/pull/3280
3892 Version 1.13.0 (2016-11-10)
3893 ===========================
3898 * [Stabilize the `?` operator][36995]. `?` is a simple way to propagate
3899 errors, like the `try!` macro, described in [RFC 0243].
3900 * [Stabilize macros in type position][36014]. Described in [RFC 873].
3901 * [Stabilize attributes on statements][36995]. Described in [RFC 0016].
3902 * [Fix `#[derive]` for empty tuple structs/variants][35728]
3903 * [Fix lifetime rules for 'if' conditions][36029]
3904 * [Avoid loading and parsing unconfigured non-inline modules][36482]
3909 * [Add the `-C link-arg` argument][36574]
3910 * [Remove the old AST-based backend from rustc_trans][35764]
3911 * [Don't enable NEON by default on armv7 Linux][35814]
3912 * [Fix debug line number info for macro expansions][35238]
3913 * [Do not emit "class method" debuginfo for types that are not
3914 DICompositeType][36008]
3915 * [Warn about multiple conflicting #[repr] hints][34623]
3916 * [When sizing DST, don't double-count nested struct prefixes][36351]
3917 * [Default RUST_MIN_STACK to 16MiB for now][36505]
3918 * [Improve rlib metadata format][36551]. Reduces rlib size significantly.
3919 * [Reject macros with empty repetitions to avoid infinite loop][36721]
3920 * [Expand macros without recursing to avoid stack overflows][36214]
3925 * [Replace macro backtraces with labeled local uses][35702]
3926 * [Improve error message for misplaced doc comments][33922]
3927 * [Buffer unix and lock windows to prevent message interleaving][35975]
3928 * [Update lifetime errors to specifically note temporaries][36171]
3929 * [Special case a few colors for Windows][36178]
3930 * [Suggest `use self` when such an import resolves][36289]
3931 * [Be more specific when type parameter shadows primitive type][36338]
3932 * Many minor improvements
3934 Compile-time Optimizations
3935 --------------------------
3937 * [Compute and cache HIR hashes at beginning][35854]
3938 * [Don't hash types in loan paths][36004]
3939 * [Cache projections in trans][35761]
3940 * [Optimize the parser's last token handling][36527]
3941 * [Only instantiate #[inline] functions in codegen units referencing
3942 them][36524]. This leads to big improvements in cases where crates export
3943 define many inline functions without using them directly.
3944 * [Lazily allocate TypedArena's first chunk][36592]
3945 * [Don't allocate during default HashSet creation][36734]
3952 * [`overflowing_abs`]
3953 * [`RefCell::try_borrow`]
3954 * [`RefCell::try_borrow_mut`]
3959 * [Add `assert_ne!` and `debug_assert_ne!`][35074]
3960 * [Make `vec_deque::Drain`, `hash_map::Drain`, and `hash_set::Drain`
3962 * [Implement `AsRef<[T]>` for `std::slice::Iter`][35559]
3963 * [Implement `Debug` for `std::vec::IntoIter`][35707]
3964 * [`CString`: avoid excessive growth just to 0-terminate][35871]
3965 * [Implement `CoerceUnsized` for `{Cell, RefCell, UnsafeCell}`][35627]
3966 * [Use arc4rand on FreeBSD][35884]
3967 * [memrchr: Correct aligned offset computation][35969]
3968 * [Improve Demangling of Rust Symbols][36059]
3969 * [Use monotonic time in condition variables][35048]
3970 * [Implement `Debug` for `std::path::{Components,Iter}`][36101]
3971 * [Implement conversion traits for `char`][35755]
3972 * [Fix illegal instruction caused by overflow in channel cloning][36104]
3973 * [Zero first byte of CString on drop][36264]
3974 * [Inherit overflow checks for sum and product][36372]
3975 * [Add missing Eq implementations][36423]
3976 * [Implement `Debug` for `DirEntry`][36631]
3977 * [When `getaddrinfo` returns `EAI_SYSTEM` retrieve actual error from
3979 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
3980 * [Implement more traits for `std::io::ErrorKind`][35911]
3981 * [Optimize BinaryHeap bounds checking][36072]
3982 * [Work around pointer aliasing issue in `Vec::extend_from_slice`,
3983 `extend_with_element`][36355]
3984 * [Fix overflow checking in unsigned pow()][34942]
3989 * This release includes security fixes to both curl and OpenSSL.
3990 * [Fix transitive doctests when panic=abort][cargo/3021]
3991 * [Add --all-features flag to cargo][cargo/3038]
3992 * [Reject path-based dependencies in `cargo package`][cargo/3060]
3993 * [Don't parse the home directory more than once][cargo/3078]
3994 * [Don't try to generate Cargo.lock on empty workspaces][cargo/3092]
3995 * [Update OpenSSL to 1.0.2j][cargo/3121]
3996 * [Add license and license_file to cargo metadata output][cargo/3110]
3997 * [Make crates-io registry URL optional in config; ignore all changes to
3998 source.crates-io][cargo/3089]
3999 * [Don't download dependencies from other platforms][cargo/3123]
4000 * [Build transitive dev-dependencies when needed][cargo/3125]
4001 * [Add support for per-target rustflags in .cargo/config][cargo/3157]
4002 * [Avoid updating registry when adding existing deps][cargo/3144]
4003 * [Warn about path overrides that won't work][cargo/3136]
4004 * [Use workspaces during `cargo install`][cargo/3146]
4005 * [Leak mspdbsrv.exe processes on Windows][cargo/3162]
4006 * [Add --message-format flag][cargo/3000]
4007 * [Pass target environment for rustdoc][cargo/3205]
4008 * [Use `CommandExt::exec` for `cargo run` on Unix][cargo/2818]
4009 * [Update curl and curl-sys][cargo/3241]
4010 * [Call rustdoc test with the correct cfg flags of a package][cargo/3242]
4015 * [rustdoc: Add the `--sysroot` argument][36586]
4016 * [rustdoc: Fix a couple of issues with the search results][35655]
4017 * [rustdoc: remove the `!` from macro URLs and titles][35234]
4018 * [gdb: Fix pretty-printing special-cased Rust types][35585]
4019 * [rustdoc: Filter more incorrect methods inherited through Deref][36266]
4024 * [Remove unmaintained style guide][35124]
4025 * [Add s390x support][36369]
4026 * [Initial work at Haiku OS support][36727]
4027 * [Add mips-uclibc targets][35734]
4028 * [Crate-ify compiler-rt into compiler-builtins][35021]
4029 * [Add rustc version info (git hash + date) to dist tarball][36213]
4030 * Many documentation improvements
4035 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
4036 * [Deny (by default) transmuting from fn item types to pointer-sized
4037 types][34923]. Continuing the long transition to zero-sized fn items,
4039 * [Fix `#[derive]` for empty tuple structs/variants][35728].
4041 * [Issue deprecation warnings for safe accesses to extern statics][36173]
4042 * [Fix lifetime rules for 'if' conditions][36029].
4043 * [Inherit overflow checks for sum and product][36372].
4044 * [Forbid user-defined macros named "macro_rules"][36730].
4046 [33922]: https://github.com/rust-lang/rust/pull/33922
4047 [34623]: https://github.com/rust-lang/rust/pull/34623
4048 [34923]: https://github.com/rust-lang/rust/pull/34923
4049 [34942]: https://github.com/rust-lang/rust/pull/34942
4050 [34982]: https://github.com/rust-lang/rust/pull/34982
4051 [35021]: https://github.com/rust-lang/rust/pull/35021
4052 [35048]: https://github.com/rust-lang/rust/pull/35048
4053 [35074]: https://github.com/rust-lang/rust/pull/35074
4054 [35124]: https://github.com/rust-lang/rust/pull/35124
4055 [35234]: https://github.com/rust-lang/rust/pull/35234
4056 [35238]: https://github.com/rust-lang/rust/pull/35238
4057 [35354]: https://github.com/rust-lang/rust/pull/35354
4058 [35559]: https://github.com/rust-lang/rust/pull/35559
4059 [35585]: https://github.com/rust-lang/rust/pull/35585
4060 [35627]: https://github.com/rust-lang/rust/pull/35627
4061 [35655]: https://github.com/rust-lang/rust/pull/35655
4062 [35702]: https://github.com/rust-lang/rust/pull/35702
4063 [35707]: https://github.com/rust-lang/rust/pull/35707
4064 [35728]: https://github.com/rust-lang/rust/pull/35728
4065 [35734]: https://github.com/rust-lang/rust/pull/35734
4066 [35755]: https://github.com/rust-lang/rust/pull/35755
4067 [35761]: https://github.com/rust-lang/rust/pull/35761
4068 [35764]: https://github.com/rust-lang/rust/pull/35764
4069 [35814]: https://github.com/rust-lang/rust/pull/35814
4070 [35854]: https://github.com/rust-lang/rust/pull/35854
4071 [35871]: https://github.com/rust-lang/rust/pull/35871
4072 [35884]: https://github.com/rust-lang/rust/pull/35884
4073 [35911]: https://github.com/rust-lang/rust/pull/35911
4074 [35969]: https://github.com/rust-lang/rust/pull/35969
4075 [35975]: https://github.com/rust-lang/rust/pull/35975
4076 [36004]: https://github.com/rust-lang/rust/pull/36004
4077 [36008]: https://github.com/rust-lang/rust/pull/36008
4078 [36014]: https://github.com/rust-lang/rust/pull/36014
4079 [36029]: https://github.com/rust-lang/rust/pull/36029
4080 [36059]: https://github.com/rust-lang/rust/pull/36059
4081 [36072]: https://github.com/rust-lang/rust/pull/36072
4082 [36101]: https://github.com/rust-lang/rust/pull/36101
4083 [36104]: https://github.com/rust-lang/rust/pull/36104
4084 [36171]: https://github.com/rust-lang/rust/pull/36171
4085 [36173]: https://github.com/rust-lang/rust/pull/36173
4086 [36178]: https://github.com/rust-lang/rust/pull/36178
4087 [36213]: https://github.com/rust-lang/rust/pull/36213
4088 [36214]: https://github.com/rust-lang/rust/pull/36214
4089 [36264]: https://github.com/rust-lang/rust/pull/36264
4090 [36266]: https://github.com/rust-lang/rust/pull/36266
4091 [36289]: https://github.com/rust-lang/rust/pull/36289
4092 [36338]: https://github.com/rust-lang/rust/pull/36338
4093 [36351]: https://github.com/rust-lang/rust/pull/36351
4094 [36355]: https://github.com/rust-lang/rust/pull/36355
4095 [36369]: https://github.com/rust-lang/rust/pull/36369
4096 [36372]: https://github.com/rust-lang/rust/pull/36372
4097 [36423]: https://github.com/rust-lang/rust/pull/36423
4098 [36482]: https://github.com/rust-lang/rust/pull/36482
4099 [36505]: https://github.com/rust-lang/rust/pull/36505
4100 [36524]: https://github.com/rust-lang/rust/pull/36524
4101 [36527]: https://github.com/rust-lang/rust/pull/36527
4102 [36551]: https://github.com/rust-lang/rust/pull/36551
4103 [36574]: https://github.com/rust-lang/rust/pull/36574
4104 [36586]: https://github.com/rust-lang/rust/pull/36586
4105 [36592]: https://github.com/rust-lang/rust/pull/36592
4106 [36631]: https://github.com/rust-lang/rust/pull/36631
4107 [36639]: https://github.com/rust-lang/rust/pull/36639
4108 [36721]: https://github.com/rust-lang/rust/pull/36721
4109 [36727]: https://github.com/rust-lang/rust/pull/36727
4110 [36730]: https://github.com/rust-lang/rust/pull/36730
4111 [36734]: https://github.com/rust-lang/rust/pull/36734
4112 [36754]: https://github.com/rust-lang/rust/pull/36754
4113 [36995]: https://github.com/rust-lang/rust/pull/36995
4114 [RFC 0016]: https://github.com/rust-lang/rfcs/blob/master/text/0016-more-attributes.md
4115 [RFC 0243]: https://github.com/rust-lang/rfcs/blob/master/text/0243-trait-based-exception-handling.md
4116 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
4117 [RFC 401]: https://github.com/rust-lang/rfcs/blob/master/text/0401-coercions.md
4118 [RFC 873]: https://github.com/rust-lang/rfcs/blob/master/text/0873-type-macros.md
4119 [cargo/2818]: https://github.com/rust-lang/cargo/pull/2818
4120 [cargo/3000]: https://github.com/rust-lang/cargo/pull/3000
4121 [cargo/3021]: https://github.com/rust-lang/cargo/pull/3021
4122 [cargo/3038]: https://github.com/rust-lang/cargo/pull/3038
4123 [cargo/3060]: https://github.com/rust-lang/cargo/pull/3060
4124 [cargo/3078]: https://github.com/rust-lang/cargo/pull/3078
4125 [cargo/3089]: https://github.com/rust-lang/cargo/pull/3089
4126 [cargo/3092]: https://github.com/rust-lang/cargo/pull/3092
4127 [cargo/3110]: https://github.com/rust-lang/cargo/pull/3110
4128 [cargo/3121]: https://github.com/rust-lang/cargo/pull/3121
4129 [cargo/3123]: https://github.com/rust-lang/cargo/pull/3123
4130 [cargo/3125]: https://github.com/rust-lang/cargo/pull/3125
4131 [cargo/3136]: https://github.com/rust-lang/cargo/pull/3136
4132 [cargo/3144]: https://github.com/rust-lang/cargo/pull/3144
4133 [cargo/3146]: https://github.com/rust-lang/cargo/pull/3146
4134 [cargo/3157]: https://github.com/rust-lang/cargo/pull/3157
4135 [cargo/3162]: https://github.com/rust-lang/cargo/pull/3162
4136 [cargo/3205]: https://github.com/rust-lang/cargo/pull/3205
4137 [cargo/3241]: https://github.com/rust-lang/cargo/pull/3241
4138 [cargo/3242]: https://github.com/rust-lang/cargo/pull/3242
4139 [rustup]: https://www.rustup.rs
4140 [`checked_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.checked_abs
4141 [`wrapping_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.wrapping_abs
4142 [`overflowing_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.overflowing_abs
4143 [`RefCell::try_borrow`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow
4144 [`RefCell::try_borrow_mut`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow_mut
4145 [`SipHasher`]: https://doc.rust-lang.org/std/hash/struct.SipHasher.html
4146 [`DefaultHasher`]: https://doc.rust-lang.org/std/collections/hash_map/struct.DefaultHasher.html
4149 Version 1.12.1 (2016-10-20)
4150 ===========================
4155 * [ICE: 'rustc' panicked at 'assertion failed: concrete_substs.is_normalized_for_trans()' #36381][36381]
4156 * [Confusion with double negation and booleans][36856]
4157 * [rustc 1.12.0 fails with SIGSEGV in release mode (syn crate 0.8.0)][36875]
4158 * [Rustc 1.12.0 Windows build of `ethcore` crate fails with LLVM error][36924]
4159 * [1.12.0: High memory usage when linking in release mode with debug info][36926]
4160 * [Corrupted memory after updated to 1.12][36936]
4161 * ["Let NullaryConstructor = something;" causes internal compiler error: "tried to overwrite interned AdtDef"][37026]
4162 * [Fix ICE: inject bitcast if types mismatch for invokes/calls/stores][37112]
4163 * [debuginfo: Handle spread_arg case in MIR-trans in a more stable way.][37153]
4165 [36381]: https://github.com/rust-lang/rust/issues/36381
4166 [36856]: https://github.com/rust-lang/rust/issues/36856
4167 [36875]: https://github.com/rust-lang/rust/issues/36875
4168 [36924]: https://github.com/rust-lang/rust/issues/36924
4169 [36926]: https://github.com/rust-lang/rust/issues/36926
4170 [36936]: https://github.com/rust-lang/rust/issues/36936
4171 [37026]: https://github.com/rust-lang/rust/issues/37026
4172 [37112]: https://github.com/rust-lang/rust/issues/37112
4173 [37153]: https://github.com/rust-lang/rust/issues/37153
4176 Version 1.12.0 (2016-09-29)
4177 ===========================
4182 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)](https://github.com/rust-lang/rust/pull/34096).
4183 This translation pass is far simpler than the previous AST->LLVM pass, and
4184 creates opportunities to perform new optimizations directly on the MIR. It
4185 was previously described [on the Rust blog](https://blog.rust-lang.org/2016/04/19/MIR.html).
4186 * [`rustc` presents a new, more readable error format, along with
4187 machine-readable JSON error output for use by IDEs](https://github.com/rust-lang/rust/pull/35401).
4188 Most common editors supporting Rust have been updated to work with it. It was
4189 previously described [on the Rust blog](https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
4194 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)](https://github.com/rust-lang/rust/pull/34096).
4195 This translation pass is far simpler than the previous AST->LLVM pass, and
4196 creates opportunities to perform new optimizations directly on the MIR. It
4197 was previously described [on the Rust blog](https://blog.rust-lang.org/2016/04/19/MIR.html).
4198 * [Print the Rust target name, not the LLVM target name, with
4199 `--print target-list`](https://github.com/rust-lang/rust/pull/35489)
4200 * [The computation of `TypeId` is correct in some cases where it was previously
4201 producing inconsistent results](https://github.com/rust-lang/rust/pull/35267)
4202 * [The `mips-unknown-linux-gnu` target uses hardware floating point by default](https://github.com/rust-lang/rust/pull/34910)
4203 * [The `rustc` arguments, `--print target-cpus`, `--print target-features`,
4204 `--print relocation-models`, and `--print code-models` print the available
4205 options to the `-C target-cpu`, `-C target-feature`, `-C relocation-model` and
4206 `-C code-model` code generation arguments](https://github.com/rust-lang/rust/pull/34845)
4207 * [`rustc` supports three new MUSL targets on ARM: `arm-unknown-linux-musleabi`,
4208 `arm-unknown-linux-musleabihf`, and `armv7-unknown-linux-musleabihf`](https://github.com/rust-lang/rust/pull/35060).
4209 These targets produce statically-linked binaries. There are no binary release
4215 * [`rustc` presents a new, more readable error format, along with
4216 machine-readable JSON error output for use by IDEs](https://github.com/rust-lang/rust/pull/35401).
4217 Most common editors supporting Rust have been updated to work with it. It was
4218 previously described [on the Rust blog](https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
4219 * [In error descriptions, references are now described in plain English,
4220 instead of as "&-ptr"](https://github.com/rust-lang/rust/pull/35611)
4221 * [In error type descriptions, unknown numeric types are named `{integer}` or
4222 `{float}` instead of `_`](https://github.com/rust-lang/rust/pull/35080)
4223 * [`rustc` emits a clearer error when inner attributes follow a doc comment](https://github.com/rust-lang/rust/pull/34676)
4228 * [`macro_rules!` invocations can be made within `macro_rules!` invocations](https://github.com/rust-lang/rust/pull/34925)
4229 * [`macro_rules!` meta-variables are hygienic](https://github.com/rust-lang/rust/pull/35453)
4230 * [`macro_rules!` `tt` matchers can be reparsed correctly, making them much more
4231 useful](https://github.com/rust-lang/rust/pull/34908)
4232 * [`macro_rules!` `stmt` matchers correctly consume the entire contents when
4233 inside non-braces invocations](https://github.com/rust-lang/rust/pull/34886)
4234 * [Semicolons are properly required as statement delimiters inside
4235 `macro_rules!` invocations](https://github.com/rust-lang/rust/pull/34660)
4236 * [`cfg_attr` works on `path` attributes](https://github.com/rust-lang/rust/pull/34546)
4241 * [`Cell::as_ptr`](https://doc.rust-lang.org/std/cell/struct.Cell.html#method.as_ptr)
4242 * [`RefCell::as_ptr`](https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.as_ptr)
4243 * [`IpAddr::is_unspecified`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_unspecified)
4244 * [`IpAddr::is_loopback`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_loopback)
4245 * [`IpAddr::is_multicast`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_multicast)
4246 * [`Ipv4Addr::is_unspecified`](https://doc.rust-lang.org/std/net/struct.Ipv4Addr.html#method.is_unspecified)
4247 * [`Ipv6Addr::octets`](https://doc.rust-lang.org/std/net/struct.Ipv6Addr.html#method.octets)
4248 * [`LinkedList::contains`](https://doc.rust-lang.org/std/collections/linked_list/struct.LinkedList.html#method.contains)
4249 * [`VecDeque::contains`](https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.contains)
4250 * [`ExitStatusExt::from_raw`](https://doc.rust-lang.org/std/os/unix/process/trait.ExitStatusExt.html#tymethod.from_raw).
4251 Both on Unix and Windows.
4252 * [`Receiver::recv_timeout`](https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.recv_timeout)
4253 * [`RecvTimeoutError`](https://doc.rust-lang.org/std/sync/mpsc/enum.RecvTimeoutError.html)
4254 * [`BinaryHeap::peek_mut`](https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.peek_mut)
4255 * [`PeekMut`](https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html)
4256 * [`iter::Product`](https://doc.rust-lang.org/std/iter/trait.Product.html)
4257 * [`iter::Sum`](https://doc.rust-lang.org/std/iter/trait.Sum.html)
4258 * [`OccupiedEntry::remove_entry`](https://doc.rust-lang.org/std/collections/btree_map/struct.OccupiedEntry.html#method.remove_entry)
4259 * [`VacantEntry::into_key`](https://doc.rust-lang.org/std/collections/btree_map/struct.VacantEntry.html#method.into_key)
4264 * [The `format!` macro and friends now allow a single argument to be formatted
4265 in multiple styles](https://github.com/rust-lang/rust/pull/33642)
4266 * [The lifetime bounds on `[T]::binary_search_by` and
4267 `[T]::binary_search_by_key` have been adjusted to be more flexible](https://github.com/rust-lang/rust/pull/34762)
4268 * [`Option` implements `From` for its contained type](https://github.com/rust-lang/rust/pull/34828)
4269 * [`Cell`, `RefCell` and `UnsafeCell` implement `From` for their contained type](https://github.com/rust-lang/rust/pull/35392)
4270 * [`RwLock` panics if the reader count overflows](https://github.com/rust-lang/rust/pull/35378)
4271 * [`vec_deque::Drain`, `hash_map::Drain` and `hash_set::Drain` are covariant](https://github.com/rust-lang/rust/pull/35354)
4272 * [`vec::Drain` and `binary_heap::Drain` are covariant](https://github.com/rust-lang/rust/pull/34951)
4273 * [`Cow<str>` implements `FromIterator` for `char`, `&str` and `String`](https://github.com/rust-lang/rust/pull/35064)
4274 * [Sockets on Linux are correctly closed in subprocesses via `SOCK_CLOEXEC`](https://github.com/rust-lang/rust/pull/34946)
4275 * [`hash_map::Entry`, `hash_map::VacantEntry` and `hash_map::OccupiedEntry`
4276 implement `Debug`](https://github.com/rust-lang/rust/pull/34937)
4277 * [`btree_map::Entry`, `btree_map::VacantEntry` and `btree_map::OccupiedEntry`
4278 implement `Debug`](https://github.com/rust-lang/rust/pull/34885)
4279 * [`String` implements `AddAssign`](https://github.com/rust-lang/rust/pull/34890)
4280 * [Variadic `extern fn` pointers implement the `Clone`, `PartialEq`, `Eq`,
4281 `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and `fmt::Debug` traits](https://github.com/rust-lang/rust/pull/34879)
4282 * [`FileType` implements `Debug`](https://github.com/rust-lang/rust/pull/34757)
4283 * [References to `Mutex` and `RwLock` are unwind-safe](https://github.com/rust-lang/rust/pull/34756)
4284 * [`mpsc::sync_channel` `Receiver`s return any available message before
4285 reporting a disconnect](https://github.com/rust-lang/rust/pull/34731)
4286 * [Unicode definitions have been updated to 9.0](https://github.com/rust-lang/rust/pull/34599)
4287 * [`env` iterators implement `DoubleEndedIterator`](https://github.com/rust-lang/rust/pull/33312)
4292 * [Support local mirrors of registries](https://github.com/rust-lang/cargo/pull/2857)
4293 * [Add support for command aliases](https://github.com/rust-lang/cargo/pull/2679)
4294 * [Allow `opt-level="s"` / `opt-level="z"` in profile overrides](https://github.com/rust-lang/cargo/pull/3007)
4295 * [Make `cargo doc --open --target` work as expected](https://github.com/rust-lang/cargo/pull/2988)
4296 * [Speed up noop registry updates](https://github.com/rust-lang/cargo/pull/2974)
4297 * [Update OpenSSL](https://github.com/rust-lang/cargo/pull/2971)
4298 * [Fix `--panic=abort` with plugins](https://github.com/rust-lang/cargo/pull/2954)
4299 * [Always pass `-C metadata` to the compiler](https://github.com/rust-lang/cargo/pull/2946)
4300 * [Fix depending on git repos with workspaces](https://github.com/rust-lang/cargo/pull/2938)
4301 * [Add a `--lib` flag to `cargo new`](https://github.com/rust-lang/cargo/pull/2921)
4302 * [Add `http.cainfo` for custom certs](https://github.com/rust-lang/cargo/pull/2917)
4303 * [Indicate the compilation profile after compiling](https://github.com/rust-lang/cargo/pull/2909)
4304 * [Allow enabling features for dependencies with `--features`](https://github.com/rust-lang/cargo/pull/2876)
4305 * [Add `--jobs` flag to `cargo package`](https://github.com/rust-lang/cargo/pull/2867)
4306 * [Add `--dry-run` to `cargo publish`](https://github.com/rust-lang/cargo/pull/2849)
4307 * [Add support for `RUSTDOCFLAGS`](https://github.com/rust-lang/cargo/pull/2794)
4312 * [`panic::catch_unwind` is more optimized](https://github.com/rust-lang/rust/pull/35444)
4313 * [`panic::catch_unwind` no longer accesses thread-local storage on entry](https://github.com/rust-lang/rust/pull/34866)
4318 * [Test binaries now support a `--test-threads` argument to specify the number
4319 of threads used to run tests, and which acts the same as the
4320 `RUST_TEST_THREADS` environment variable](https://github.com/rust-lang/rust/pull/35414)
4321 * [The test runner now emits a warning when tests run over 60 seconds](https://github.com/rust-lang/rust/pull/35405)
4322 * [rustdoc: Fix methods in search results](https://github.com/rust-lang/rust/pull/34752)
4323 * [`rust-lldb` warns about unsupported versions of LLDB](https://github.com/rust-lang/rust/pull/34646)
4324 * [Rust releases now come with source packages that can be installed by rustup
4325 via `rustup component add rust-src`](https://github.com/rust-lang/rust/pull/34366).
4326 The resulting source code can be used by tools and IDES, located in the
4327 sysroot under `lib/rustlib/src`.
4332 * [The compiler can now be built against LLVM 3.9](https://github.com/rust-lang/rust/pull/35594)
4333 * Many minor improvements to the documentation.
4334 * [The Rust exception handling "personality" routine is now written in Rust](https://github.com/rust-lang/rust/pull/34832)
4339 * [When printing Windows `OsStr`s, unpaired surrogate codepoints are escaped
4340 with the lowercase format instead of the uppercase](https://github.com/rust-lang/rust/pull/35084)
4341 * [When formatting strings, if "precision" is specified, the "fill",
4342 "align" and "width" specifiers are no longer ignored](https://github.com/rust-lang/rust/pull/34544)
4343 * [The `Debug` impl for strings no longer escapes all non-ASCII characters](https://github.com/rust-lang/rust/pull/34485)
4346 Version 1.11.0 (2016-08-18)
4347 ===========================
4352 * [`cfg_attr` works on `path` attributes](https://github.com/rust-lang/rust/pull/34546)
4353 * [Support nested `cfg_attr` attributes](https://github.com/rust-lang/rust/pull/34216)
4354 * [Allow statement-generating braced macro invocations at the end of blocks](https://github.com/rust-lang/rust/pull/34436)
4355 * [Macros can be expanded inside of trait definitions](https://github.com/rust-lang/rust/pull/34213)
4356 * [`#[macro_use]` works properly when it is itself expanded from a macro](https://github.com/rust-lang/rust/pull/34032)
4361 * [`BinaryHeap::append`](https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.append)
4362 * [`BTreeMap::append`](https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.append)
4363 * [`BTreeMap::split_off`](https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.split_off)
4364 * [`BTreeSet::append`](https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.append)
4365 * [`BTreeSet::split_off`](https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.split_off)
4366 * [`f32::to_degrees`](https://doc.rust-lang.org/std/primitive.f32.html#method.to_degrees)
4367 (in libcore - previously stabilized in libstd)
4368 * [`f32::to_radians`](https://doc.rust-lang.org/std/primitive.f32.html#method.to_radians)
4369 (in libcore - previously stabilized in libstd)
4370 * [`f64::to_degrees`](https://doc.rust-lang.org/std/primitive.f64.html#method.to_degrees)
4371 (in libcore - previously stabilized in libstd)
4372 * [`f64::to_radians`](https://doc.rust-lang.org/std/primitive.f64.html#method.to_radians)
4373 (in libcore - previously stabilized in libstd)
4374 * [`Iterator::sum`](https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
4375 * [`Iterator::product`](https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
4376 * [`Cell::get_mut`](https://doc.rust-lang.org/std/cell/struct.Cell.html#method.get_mut)
4377 * [`RefCell::get_mut`](https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.get_mut)
4382 * [The `thread_local!` macro supports multiple definitions in a single
4383 invocation, and can apply attributes](https://github.com/rust-lang/rust/pull/34077)
4384 * [`Cow` implements `Default`](https://github.com/rust-lang/rust/pull/34305)
4385 * [`Wrapping` implements binary, octal, lower-hex and upper-hex
4386 `Display` formatting](https://github.com/rust-lang/rust/pull/34190)
4387 * [The range types implement `Hash`](https://github.com/rust-lang/rust/pull/34180)
4388 * [`lookup_host` ignores unknown address types](https://github.com/rust-lang/rust/pull/34067)
4389 * [`assert_eq!` accepts a custom error message, like `assert!` does](https://github.com/rust-lang/rust/pull/33976)
4390 * [The main thread is now called "main" instead of "<main>"](https://github.com/rust-lang/rust/pull/33803)
4395 * [Disallow specifying features of transitive deps](https://github.com/rust-lang/cargo/pull/2821)
4396 * [Add color support for Windows consoles](https://github.com/rust-lang/cargo/pull/2804)
4397 * [Fix `harness = false` on `[lib]` sections](https://github.com/rust-lang/cargo/pull/2795)
4398 * [Don't panic when `links` contains a '.'](https://github.com/rust-lang/cargo/pull/2787)
4399 * [Build scripts can emit warnings](https://github.com/rust-lang/cargo/pull/2630),
4400 and `-vv` prints warnings for all crates.
4401 * [Ignore file locks on OS X NFS mounts](https://github.com/rust-lang/cargo/pull/2720)
4402 * [Don't warn about `package.metadata` keys](https://github.com/rust-lang/cargo/pull/2668).
4403 This provides room for expansion by arbitrary tools.
4404 * [Add support for cdylib crate types](https://github.com/rust-lang/cargo/pull/2741)
4405 * [Prevent publishing crates when files are dirty](https://github.com/rust-lang/cargo/pull/2781)
4406 * [Don't fetch all crates on clean](https://github.com/rust-lang/cargo/pull/2704)
4407 * [Propagate --color option to rustc](https://github.com/rust-lang/cargo/pull/2779)
4408 * [Fix `cargo doc --open` on Windows](https://github.com/rust-lang/cargo/pull/2780)
4409 * [Improve autocompletion](https://github.com/rust-lang/cargo/pull/2772)
4410 * [Configure colors of stderr as well as stdout](https://github.com/rust-lang/cargo/pull/2739)
4415 * [Caching projections speeds up type check dramatically for some
4416 workloads](https://github.com/rust-lang/rust/pull/33816)
4417 * [The default `HashMap` hasher is SipHash 1-3 instead of SipHash 2-4](https://github.com/rust-lang/rust/pull/33940)
4418 This hasher is faster, but is believed to provide sufficient
4419 protection from collision attacks.
4420 * [Comparison of `Ipv4Addr` is 10x faster](https://github.com/rust-lang/rust/pull/33891)
4425 * [Fix empty implementation section on some module pages](https://github.com/rust-lang/rust/pull/34536)
4426 * [Fix inlined renamed re-exports in import lists](https://github.com/rust-lang/rust/pull/34479)
4427 * [Fix search result layout for enum variants and struct fields](https://github.com/rust-lang/rust/pull/34477)
4428 * [Fix issues with source links to external crates](https://github.com/rust-lang/rust/pull/34387)
4429 * [Fix redirect pages for renamed re-exports](https://github.com/rust-lang/rust/pull/34245)
4434 * [rustc is better at finding the MSVC toolchain](https://github.com/rust-lang/rust/pull/34492)
4435 * [When emitting debug info, rustc emits frame pointers for closures,
4436 shims and glue, as it does for all other functions](https://github.com/rust-lang/rust/pull/33909)
4437 * [rust-lldb warns about unsupported versions of LLDB](https://github.com/rust-lang/rust/pull/34646)
4438 * Many more errors have been given error codes and extended
4440 * API documentation continues to be improved, with many new examples
4445 * [rustc no longer hangs when dependencies recursively re-export
4446 submodules](https://github.com/rust-lang/rust/pull/34542)
4447 * [rustc requires LLVM 3.7+](https://github.com/rust-lang/rust/pull/34104)
4448 * [The 'How Safe and Unsafe Interact' chapter of The Rustonomicon was
4449 rewritten](https://github.com/rust-lang/rust/pull/33895)
4450 * [rustc support 16-bit pointer sizes](https://github.com/rust-lang/rust/pull/33460).
4451 No targets use this yet, but it works toward AVR support.
4456 * [`const`s and `static`s may not have unsized types](https://github.com/rust-lang/rust/pull/34443)
4457 * [The new follow-set rules that place restrictions on `macro_rules!`
4458 in order to ensure syntax forward-compatibility have been enabled](https://github.com/rust-lang/rust/pull/33982)
4459 This was an [amendment to RFC 550](https://github.com/rust-lang/rfcs/pull/1384),
4460 and has been a warning since 1.10.
4461 * [`cfg` attribute process has been refactored to fix various bugs](https://github.com/rust-lang/rust/pull/33706).
4462 This causes breakage in some corner cases.
4465 Version 1.10.0 (2016-07-07)
4466 ===========================
4471 * [Allow `concat_idents!` in type positions as well as in expression
4472 positions](https://github.com/rust-lang/rust/pull/33735).
4473 * [`Copy` types are required to have a trivial implementation of `Clone`](https://github.com/rust-lang/rust/pull/33420).
4474 [RFC 1521](https://github.com/rust-lang/rfcs/blob/master/text/1521-copy-clone-semantics.md).
4475 * [Single-variant enums support the `#[repr(..)]` attribute](https://github.com/rust-lang/rust/pull/33355).
4476 * [Fix `#[derive(RustcEncodable)]` in the presence of other `encode` methods](https://github.com/rust-lang/rust/pull/32908).
4477 * [`panic!` can be converted to a runtime abort with the
4478 `-C panic=abort` flag](https://github.com/rust-lang/rust/pull/32900).
4479 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
4480 * [Add a new crate type, 'cdylib'](https://github.com/rust-lang/rust/pull/33553).
4481 cdylibs are dynamic libraries suitable for loading by non-Rust hosts.
4482 [RFC 1510](https://github.com/rust-lang/rfcs/blob/master/text/1510-cdylib.md).
4483 Note that Cargo does not yet directly support cdylibs.
4488 * `os::windows::fs::OpenOptionsExt::access_mode`
4489 * `os::windows::fs::OpenOptionsExt::share_mode`
4490 * `os::windows::fs::OpenOptionsExt::custom_flags`
4491 * `os::windows::fs::OpenOptionsExt::attributes`
4492 * `os::windows::fs::OpenOptionsExt::security_qos_flags`
4493 * `os::unix::fs::OpenOptionsExt::custom_flags`
4494 * [`sync::Weak::new`](http://doc.rust-lang.org/alloc/arc/struct.Weak.html#method.new)
4495 * `Default for sync::Weak`
4496 * [`panic::set_hook`](http://doc.rust-lang.org/std/panic/fn.set_hook.html)
4497 * [`panic::take_hook`](http://doc.rust-lang.org/std/panic/fn.take_hook.html)
4498 * [`panic::PanicInfo`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html)
4499 * [`panic::PanicInfo::payload`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.payload)
4500 * [`panic::PanicInfo::location`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.location)
4501 * [`panic::Location`](http://doc.rust-lang.org/std/panic/struct.Location.html)
4502 * [`panic::Location::file`](http://doc.rust-lang.org/std/panic/struct.Location.html#method.file)
4503 * [`panic::Location::line`](http://doc.rust-lang.org/std/panic/struct.Location.html#method.line)
4504 * [`ffi::CStr::from_bytes_with_nul`](http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul)
4505 * [`ffi::CStr::from_bytes_with_nul_unchecked`](http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul_unchecked)
4506 * [`ffi::FromBytesWithNulError`](http://doc.rust-lang.org/std/ffi/struct.FromBytesWithNulError.html)
4507 * [`fs::Metadata::modified`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.modified)
4508 * [`fs::Metadata::accessed`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.accessed)
4509 * [`fs::Metadata::created`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.created)
4510 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange`
4511 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange_weak`
4512 * `collections::{btree,hash}_map::{Occupied,Vacant,}Entry::key`
4513 * `os::unix::net::{UnixStream, UnixListener, UnixDatagram, SocketAddr}`
4514 * [`SocketAddr::is_unnamed`](http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.is_unnamed)
4515 * [`SocketAddr::as_pathname`](http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.as_pathname)
4516 * [`UnixStream::connect`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.connect)
4517 * [`UnixStream::pair`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.pair)
4518 * [`UnixStream::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.try_clone)
4519 * [`UnixStream::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.local_addr)
4520 * [`UnixStream::peer_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.peer_addr)
4521 * [`UnixStream::set_read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
4522 * [`UnixStream::set_write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
4523 * [`UnixStream::read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
4524 * [`UnixStream::write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
4525 * [`UnixStream::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.set_nonblocking)
4526 * [`UnixStream::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.take_error)
4527 * [`UnixStream::shutdown`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.shutdown)
4528 * Read/Write/RawFd impls for `UnixStream`
4529 * [`UnixListener::bind`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.bind)
4530 * [`UnixListener::accept`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.accept)
4531 * [`UnixListener::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.try_clone)
4532 * [`UnixListener::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.local_addr)
4533 * [`UnixListener::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.set_nonblocking)
4534 * [`UnixListener::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.take_error)
4535 * [`UnixListener::incoming`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.incoming)
4536 * RawFd impls for `UnixListener`
4537 * [`UnixDatagram::bind`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.bind)
4538 * [`UnixDatagram::unbound`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.unbound)
4539 * [`UnixDatagram::pair`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.pair)
4540 * [`UnixDatagram::connect`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.connect)
4541 * [`UnixDatagram::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.try_clone)
4542 * [`UnixDatagram::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.local_addr)
4543 * [`UnixDatagram::peer_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.peer_addr)
4544 * [`UnixDatagram::recv_from`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv_from)
4545 * [`UnixDatagram::recv`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv)
4546 * [`UnixDatagram::send_to`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send_to)
4547 * [`UnixDatagram::send`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send)
4548 * [`UnixDatagram::set_read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_read_timeout)
4549 * [`UnixDatagram::set_write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_write_timeout)
4550 * [`UnixDatagram::read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.read_timeout)
4551 * [`UnixDatagram::write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.write_timeout)
4552 * [`UnixDatagram::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_nonblocking)
4553 * [`UnixDatagram::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.take_error)
4554 * [`UnixDatagram::shutdown`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.shutdown)
4555 * RawFd impls for `UnixDatagram`
4556 * `{BTree,Hash}Map::values_mut`
4557 * [`<[_]>::binary_search_by_key`](http://doc.rust-lang.org/std/primitive.slice.html#method.binary_search_by_key)
4562 * [The `abs_sub` method of floats is deprecated](https://github.com/rust-lang/rust/pull/33664).
4563 The semantics of this minor method are subtle and probably not what
4565 * [Add implementation of Ord for Cell<T> and RefCell<T> where T: Ord](https://github.com/rust-lang/rust/pull/33306).
4566 * [On Linux, if `HashMap`s can't be initialized with `getrandom` they
4567 will fall back to `/dev/urandom` temporarily to avoid blocking
4568 during early boot](https://github.com/rust-lang/rust/pull/33086).
4569 * [Implemented negation for wrapping numerals](https://github.com/rust-lang/rust/pull/33067).
4570 * [Implement `Clone` for `binary_heap::IntoIter`](https://github.com/rust-lang/rust/pull/33050).
4571 * [Implement `Display` and `Hash` for `std::num::Wrapping`](https://github.com/rust-lang/rust/pull/33023).
4572 * [Add `Default` implementation for `&CStr`, `CString`](https://github.com/rust-lang/rust/pull/32990).
4573 * [Implement `From<Vec<T>>` and `Into<Vec<T>>` for `VecDeque<T>`](https://github.com/rust-lang/rust/pull/32866).
4574 * [Implement `Default` for `UnsafeCell`, `fmt::Error`, `Condvar`,
4575 `Mutex`, `RwLock`](https://github.com/rust-lang/rust/pull/32785).
4579 * [Cargo.toml supports the `profile.*.panic` option](https://github.com/rust-lang/cargo/pull/2687).
4580 This controls the runtime behavior of the `panic!` macro
4581 and can be either "unwind" (the default), or "abort".
4582 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
4583 * [Don't throw away errors with `-p` arguments](https://github.com/rust-lang/cargo/pull/2723).
4584 * [Report status to stderr instead of stdout](https://github.com/rust-lang/cargo/pull/2693).
4585 * [Build scripts are passed a `CARGO_MANIFEST_LINKS` environment
4586 variable that corresponds to the `links` field of the manifest](https://github.com/rust-lang/cargo/pull/2710).
4587 * [Ban keywords from crate names](https://github.com/rust-lang/cargo/pull/2707).
4588 * [Canonicalize `CARGO_HOME` on Windows](https://github.com/rust-lang/cargo/pull/2604).
4589 * [Retry network requests](https://github.com/rust-lang/cargo/pull/2396).
4590 By default they are retried twice, which can be customized with the
4591 `net.retry` value in `.cargo/config`.
4592 * [Don't print extra error info for failing subcommands](https://github.com/rust-lang/cargo/pull/2674).
4593 * [Add `--force` flag to `cargo install`](https://github.com/rust-lang/cargo/pull/2405).
4594 * [Don't use `flock` on NFS mounts](https://github.com/rust-lang/cargo/pull/2623).
4595 * [Prefer building `cargo install` artifacts in temporary directories](https://github.com/rust-lang/cargo/pull/2610).
4596 Makes it possible to install multiple crates in parallel.
4597 * [Add `cargo test --doc`](https://github.com/rust-lang/cargo/pull/2578).
4598 * [Add `cargo --explain`](https://github.com/rust-lang/cargo/pull/2551).
4599 * [Don't print warnings when `-q` is passed](https://github.com/rust-lang/cargo/pull/2576).
4600 * [Add `cargo doc --lib` and `--bin`](https://github.com/rust-lang/cargo/pull/2577).
4601 * [Don't require build script output to be UTF-8](https://github.com/rust-lang/cargo/pull/2560).
4602 * [Correctly attempt multiple git usernames](https://github.com/rust-lang/cargo/pull/2584).
4607 * [rustc memory usage was reduced by refactoring the context used for
4608 type checking](https://github.com/rust-lang/rust/pull/33425).
4609 * [Speed up creation of `HashMap`s by caching the random keys used
4610 to initialize the hash state](https://github.com/rust-lang/rust/pull/33318).
4611 * [The `find` implementation for `Chain` iterators is 2x faster](https://github.com/rust-lang/rust/pull/33289).
4612 * [Trait selection optimizations speed up type checking by 15%](https://github.com/rust-lang/rust/pull/33138).
4613 * [Efficient trie lookup for boolean Unicode properties](https://github.com/rust-lang/rust/pull/33098).
4614 10x faster than the previous lookup tables.
4615 * [Special case `#[derive(Copy, Clone)]` to avoid bloat](https://github.com/rust-lang/rust/pull/31414).
4620 * Many incremental improvements to documentation and rustdoc.
4621 * [rustdoc: List blanket trait impls](https://github.com/rust-lang/rust/pull/33514).
4622 * [rustdoc: Clean up ABI rendering](https://github.com/rust-lang/rust/pull/33151).
4623 * [Indexing with the wrong type produces a more informative error](https://github.com/rust-lang/rust/pull/33401).
4624 * [Improve diagnostics for constants being used in irrefutable patterns](https://github.com/rust-lang/rust/pull/33406).
4625 * [When many method candidates are in scope limit the suggestions to 10](https://github.com/rust-lang/rust/pull/33338).
4626 * [Remove confusing suggestion when calling a `fn` type](https://github.com/rust-lang/rust/pull/33325).
4627 * [Do not suggest changing `&mut self` to `&mut mut self`](https://github.com/rust-lang/rust/pull/33319).
4632 * [Update i686-linux-android features to match Android ABI](https://github.com/rust-lang/rust/pull/33651).
4633 * [Update aarch64-linux-android features to match Android ABI](https://github.com/rust-lang/rust/pull/33500).
4634 * [`std` no longer prints backtraces on platforms where the running
4635 module must be loaded with `env::current_exe`, which can't be relied
4636 on](https://github.com/rust-lang/rust/pull/33554).
4637 * This release includes std binaries for the i586-unknown-linux-gnu,
4638 i686-unknown-linux-musl, and armv7-linux-androideabi targets. The
4639 i586 target is for old x86 hardware without SSE2, and the armv7
4640 target is for Android running on modern ARM architectures.
4641 * [The `rust-gdb` and `rust-lldb` scripts are distributed on all
4642 Unix platforms](https://github.com/rust-lang/rust/pull/32835).
4643 * [On Unix the runtime aborts by calling `libc::abort` instead of
4644 generating an illegal instruction](https://github.com/rust-lang/rust/pull/31457).
4645 * [Rust is now bootstrapped from the previous release of Rust,
4646 instead of a snapshot from an arbitrary commit](https://github.com/rust-lang/rust/pull/32942).
4651 * [`AtomicBool` is now bool-sized, not word-sized](https://github.com/rust-lang/rust/pull/33579).
4652 * [`target_env` for Linux ARM targets is just `gnu`, not
4653 `gnueabihf`, `gnueabi`, etc](https://github.com/rust-lang/rust/pull/33403).
4654 * [Consistently panic on overflow in `Duration::new`](https://github.com/rust-lang/rust/pull/33072).
4655 * [Change `String::truncate` to panic less](https://github.com/rust-lang/rust/pull/32977).
4656 * [Add `:block` to the follow set for `:ty` and `:path`](https://github.com/rust-lang/rust/pull/32945).
4657 Affects how macros are parsed.
4658 * [Fix macro hygiene bug](https://github.com/rust-lang/rust/pull/32923).
4659 * [Feature-gated attributes on macro-generated macro invocations are
4660 now rejected](https://github.com/rust-lang/rust/pull/32791).
4661 * [Suppress fallback and ambiguity errors during type inference](https://github.com/rust-lang/rust/pull/32258).
4662 This caused some minor changes to type inference.
4665 Version 1.9.0 (2016-05-26)
4666 ==========================
4671 * The `#[deprecated]` attribute when applied to an API will generate
4672 warnings when used. The warnings may be suppressed with
4673 `#[allow(deprecated)]`. [RFC 1270].
4674 * [`fn` item types are zero sized, and each `fn` names a unique
4675 type][1.9fn]. This will break code that transmutes `fn`s, so calling
4676 `transmute` on a `fn` type will generate a warning for a few cycles,
4677 then will be converted to an error.
4678 * [Field and method resolution understand visibility, so private
4679 fields and methods cannot prevent the proper use of public fields
4680 and methods][1.9fv].
4681 * [The parser considers unicode codepoints in the
4682 `PATTERN_WHITE_SPACE` category to be whitespace][1.9ws].
4688 * [`std::panic::catch_unwind`][] (renamed from `recover`)
4689 * [`std::panic::resume_unwind`][] (renamed from `propagate`)
4690 * [`std::panic::AssertUnwindSafe`][] (renamed from `AssertRecoverSafe`)
4691 * [`std::panic::UnwindSafe`][] (renamed from `RecoverSafe`)
4692 * [`str::is_char_boundary`]
4693 * [`<*const T>::as_ref`]
4694 * [`<*mut T>::as_ref`]
4695 * [`<*mut T>::as_mut`]
4696 * [`AsciiExt::make_ascii_uppercase`]
4697 * [`AsciiExt::make_ascii_lowercase`]
4698 * [`char::decode_utf16`]
4699 * [`char::DecodeUtf16`]
4700 * [`char::DecodeUtf16Error`]
4701 * [`char::DecodeUtf16Error::unpaired_surrogate`]
4702 * [`BTreeSet::take`]
4703 * [`BTreeSet::replace`]
4706 * [`HashSet::replace`]
4708 * [`OsString::with_capacity`]
4709 * [`OsString::clear`]
4710 * [`OsString::capacity`]
4711 * [`OsString::reserve`]
4712 * [`OsString::reserve_exact`]
4713 * [`OsStr::is_empty`]
4715 * [`std::os::unix::thread`]
4718 * [`JoinHandleExt::as_pthread_t`]
4719 * [`JoinHandleExt::into_pthread_t`]
4720 * [`HashSet::hasher`]
4721 * [`HashMap::hasher`]
4722 * [`CommandExt::exec`]
4723 * [`File::try_clone`]
4724 * [`SocketAddr::set_ip`]
4725 * [`SocketAddr::set_port`]
4726 * [`SocketAddrV4::set_ip`]
4727 * [`SocketAddrV4::set_port`]
4728 * [`SocketAddrV6::set_ip`]
4729 * [`SocketAddrV6::set_port`]
4730 * [`SocketAddrV6::set_flowinfo`]
4731 * [`SocketAddrV6::set_scope_id`]
4732 * [`slice::copy_from_slice`]
4733 * [`ptr::read_volatile`]
4734 * [`ptr::write_volatile`]
4735 * [`OpenOptions::create_new`]
4736 * [`TcpStream::set_nodelay`]
4737 * [`TcpStream::nodelay`]
4738 * [`TcpStream::set_ttl`]
4739 * [`TcpStream::ttl`]
4740 * [`TcpStream::set_only_v6`]
4741 * [`TcpStream::only_v6`]
4742 * [`TcpStream::take_error`]
4743 * [`TcpStream::set_nonblocking`]
4744 * [`TcpListener::set_ttl`]
4745 * [`TcpListener::ttl`]
4746 * [`TcpListener::set_only_v6`]
4747 * [`TcpListener::only_v6`]
4748 * [`TcpListener::take_error`]
4749 * [`TcpListener::set_nonblocking`]
4750 * [`UdpSocket::set_broadcast`]
4751 * [`UdpSocket::broadcast`]
4752 * [`UdpSocket::set_multicast_loop_v4`]
4753 * [`UdpSocket::multicast_loop_v4`]
4754 * [`UdpSocket::set_multicast_ttl_v4`]
4755 * [`UdpSocket::multicast_ttl_v4`]
4756 * [`UdpSocket::set_multicast_loop_v6`]
4757 * [`UdpSocket::multicast_loop_v6`]
4758 * [`UdpSocket::set_multicast_ttl_v6`]
4759 * [`UdpSocket::multicast_ttl_v6`]
4760 * [`UdpSocket::set_ttl`]
4761 * [`UdpSocket::ttl`]
4762 * [`UdpSocket::set_only_v6`]
4763 * [`UdpSocket::only_v6`]
4764 * [`UdpSocket::join_multicast_v4`]
4765 * [`UdpSocket::join_multicast_v6`]
4766 * [`UdpSocket::leave_multicast_v4`]
4767 * [`UdpSocket::leave_multicast_v6`]
4768 * [`UdpSocket::take_error`]
4769 * [`UdpSocket::connect`]
4770 * [`UdpSocket::send`]
4771 * [`UdpSocket::recv`]
4772 * [`UdpSocket::set_nonblocking`]
4777 * [`std::sync::Once` is poisoned if its initialization function
4779 * [`cell::Ref` and `cell::RefMut` can contain unsized types][1.9cu].
4780 * [Most types implement `fmt::Debug`][1.9db].
4781 * [The default buffer size used by `BufReader` and `BufWriter` was
4782 reduced to 8K, from 64K][1.9bf]. This is in line with the buffer size
4783 used by other languages.
4784 * [`Instant`, `SystemTime` and `Duration` implement `+=` and `-=`.
4785 `Duration` additionally implements `*=` and `/=`][1.9ta].
4786 * [`Skip` is a `DoubleEndedIterator`][1.9sk].
4787 * [`From<[u8; 4]>` is implemented for `Ipv4Addr`][1.9fi].
4788 * [`Chain` implements `BufRead`][1.9ch].
4789 * [`HashMap`, `HashSet` and iterators are covariant][1.9hc].
4794 * [Cargo can now run concurrently][1.9cc].
4795 * [Top-level overrides allow specific revisions of crates to be
4796 overridden through the entire crate graph][1.9ct]. This is intended
4797 to make upgrades easier for large projects, by allowing crates to be
4798 forked temporarily until they've been upgraded and republished.
4799 * [Cargo exports a `CARGO_PKG_AUTHORS` environment variable][1.9cp].
4800 * [Cargo will pass the contents of the `RUSTFLAGS` variable to `rustc`
4801 on the commandline][1.9cf]. `rustc` arguments can also be specified
4802 in the `build.rustflags` configuration key.
4807 * [The time complexity of comparing variables for equivalence during type
4808 unification is reduced from _O_(_n_!) to _O_(_n_)][1.9tu]. This leads
4809 to major compilation time improvement in some scenarios.
4810 * [`ToString` is specialized for `str`, giving it the same performance
4811 as `to_owned`][1.9ts].
4812 * [Spawning processes with `Command::output` no longer creates extra
4814 * [`#[derive(PartialEq)]` and `#[derive(PartialOrd)]` emit less code
4815 for C-like enums][1.9cl].
4820 * [Passing the `--quiet` flag to a test runner will produce
4821 much-abbreviated output][1.9q].
4822 * The Rust Project now publishes std binaries for the
4823 `mips-unknown-linux-musl`, `mipsel-unknown-linux-musl`, and
4824 `i586-pc-windows-msvc` targets.
4829 * [`std::sync::Once` is poisoned if its initialization function
4831 * [It is illegal to define methods with the same name in overlapping
4832 inherent `impl` blocks][1.9sn].
4833 * [`fn` item types are zero sized, and each `fn` names a unique
4834 type][1.9fn]. This will break code that transmutes `fn`s, so calling
4835 `transmute` on a `fn` type will generate a warning for a few cycles,
4836 then will be converted to an error.
4837 * [Improvements to const evaluation may trigger new errors when integer
4838 literals are out of range][1.9ce].
4841 [1.9bf]: https://github.com/rust-lang/rust/pull/32695
4842 [1.9cc]: https://github.com/rust-lang/cargo/pull/2486
4843 [1.9ce]: https://github.com/rust-lang/rust/pull/30587
4844 [1.9cf]: https://github.com/rust-lang/cargo/pull/2241
4845 [1.9ch]: https://github.com/rust-lang/rust/pull/32541
4846 [1.9cl]: https://github.com/rust-lang/rust/pull/31977
4847 [1.9cp]: https://github.com/rust-lang/cargo/pull/2465
4848 [1.9ct]: https://github.com/rust-lang/cargo/pull/2385
4849 [1.9cu]: https://github.com/rust-lang/rust/pull/32652
4850 [1.9db]: https://github.com/rust-lang/rust/pull/32054
4851 [1.9fi]: https://github.com/rust-lang/rust/pull/32050
4852 [1.9fn]: https://github.com/rust-lang/rust/pull/31710
4853 [1.9fv]: https://github.com/rust-lang/rust/pull/31938
4854 [1.9hc]: https://github.com/rust-lang/rust/pull/32635
4855 [1.9o]: https://github.com/rust-lang/rust/pull/32325
4856 [1.9q]: https://github.com/rust-lang/rust/pull/31887
4857 [1.9sk]: https://github.com/rust-lang/rust/pull/31700
4858 [1.9sn]: https://github.com/rust-lang/rust/pull/31925
4859 [1.9sp]: https://github.com/rust-lang/rust/pull/31618
4860 [1.9ta]: https://github.com/rust-lang/rust/pull/32448
4861 [1.9ts]: https://github.com/rust-lang/rust/pull/32586
4862 [1.9tu]: https://github.com/rust-lang/rust/pull/32062
4863 [1.9ws]: https://github.com/rust-lang/rust/pull/29734
4864 [RFC 1270]: https://github.com/rust-lang/rfcs/blob/master/text/1270-deprecation.md
4865 [`<*const T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
4866 [`<*mut T>::as_mut`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_mut
4867 [`<*mut T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
4868 [`slice::copy_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.copy_from_slice
4869 [`AsciiExt::make_ascii_lowercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_lowercase
4870 [`AsciiExt::make_ascii_uppercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_uppercase
4871 [`BTreeSet::get`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.get
4872 [`BTreeSet::replace`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.replace
4873 [`BTreeSet::take`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.take
4874 [`CommandExt::exec`]: http://doc.rust-lang.org/nightly/std/os/unix/process/trait.CommandExt.html#tymethod.exec
4875 [`File::try_clone`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html#method.try_clone
4876 [`HashMap::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.hasher
4877 [`HashSet::get`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.get
4878 [`HashSet::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.hasher
4879 [`HashSet::replace`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.replace
4880 [`HashSet::take`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.take
4881 [`JoinHandleExt::as_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.as_pthread_t
4882 [`JoinHandleExt::into_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.into_pthread_t
4883 [`JoinHandleExt`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html
4884 [`OpenOptions::create_new`]: http://doc.rust-lang.org/nightly/std/fs/struct.OpenOptions.html#method.create_new
4885 [`OsStr::is_empty`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.is_empty
4886 [`OsStr::len`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.len
4887 [`OsString::capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.capacity
4888 [`OsString::clear`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.clear
4889 [`OsString::reserve_exact`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve_exact
4890 [`OsString::reserve`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve
4891 [`OsString::with_capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.with_capacity
4892 [`RawPthread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/type.RawPthread.html
4893 [`SocketAddr::set_ip`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_ip
4894 [`SocketAddr::set_port`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_port
4895 [`SocketAddrV4::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_ip
4896 [`SocketAddrV4::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_port
4897 [`SocketAddrV6::set_flowinfo`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_flowinfo
4898 [`SocketAddrV6::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_ip
4899 [`SocketAddrV6::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_port
4900 [`SocketAddrV6::set_scope_id`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_scope_id
4901 [`TcpListener::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
4902 [`TcpListener::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
4903 [`TcpListener::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
4904 [`TcpListener::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
4905 [`TcpListener::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
4906 [`TcpListener::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
4907 [`TcpStream::nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.nodelay
4908 [`TcpStream::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
4909 [`TcpStream::set_nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nodelay
4910 [`TcpStream::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
4911 [`TcpStream::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
4912 [`TcpStream::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
4913 [`TcpStream::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
4914 [`TcpStream::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
4915 [`UdpSocket::broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.broadcast
4916 [`UdpSocket::connect`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.connect
4917 [`UdpSocket::join_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v4
4918 [`UdpSocket::join_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v6
4919 [`UdpSocket::leave_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v4
4920 [`UdpSocket::leave_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v6
4921 [`UdpSocket::multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v4
4922 [`UdpSocket::multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v6
4923 [`UdpSocket::multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v4
4924 [`UdpSocket::multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v6
4925 [`UdpSocket::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.only_v6
4926 [`UdpSocket::recv`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.recv
4927 [`UdpSocket::send`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.send
4928 [`UdpSocket::set_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_broadcast
4929 [`UdpSocket::set_multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v4
4930 [`UdpSocket::set_multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v6
4931 [`UdpSocket::set_multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v4
4932 [`UdpSocket::set_multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v6
4933 [`UdpSocket::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_nonblocking
4934 [`UdpSocket::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_only_v6
4935 [`UdpSocket::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_ttl
4936 [`UdpSocket::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.take_error
4937 [`UdpSocket::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.ttl
4938 [`char::DecodeUtf16Error::unpaired_surrogate`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html#method.unpaired_surrogate
4939 [`char::DecodeUtf16Error`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html
4940 [`char::DecodeUtf16`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16.html
4941 [`char::decode_utf16`]: http://doc.rust-lang.org/nightly/std/char/fn.decode_utf16.html
4942 [`ptr::read_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.read_volatile.html
4943 [`ptr::write_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.write_volatile.html
4944 [`std::os::unix::thread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/index.html
4945 [`std::panic::AssertUnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/struct.AssertUnwindSafe.html
4946 [`std::panic::UnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/trait.UnwindSafe.html
4947 [`std::panic::catch_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.catch_unwind.html
4948 [`std::panic::resume_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.resume_unwind.html
4949 [`std::panic`]: http://doc.rust-lang.org/nightly/std/panic/index.html
4950 [`str::is_char_boundary`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.is_char_boundary
4953 Version 1.8.0 (2016-04-14)
4954 ==========================
4959 * Rust supports overloading of compound assignment statements like
4960 `+=` by implementing the [`AddAssign`], [`SubAssign`],
4961 [`MulAssign`], [`DivAssign`], [`RemAssign`], [`BitAndAssign`],
4962 [`BitOrAssign`], [`BitXorAssign`], [`ShlAssign`], or [`ShrAssign`]
4964 * Empty structs can be defined with braces, as in `struct Foo { }`, in
4965 addition to the non-braced form, `struct Foo;`. [RFC 218].
4971 * [`str::encode_utf16`][] (renamed from `utf16_units`)
4972 * [`str::EncodeUtf16`][] (renamed from `Utf16Units`)
4975 * [`ptr::drop_in_place`]
4977 * [`time::SystemTime`]
4979 * [`Instant::duration_since`][] (renamed from `duration_from_earlier`)
4980 * [`Instant::elapsed`]
4981 * [`SystemTime::now`]
4982 * [`SystemTime::duration_since`][] (renamed from `duration_from_earlier`)
4983 * [`SystemTime::elapsed`]
4984 * Various `Add`/`Sub` impls for `Time` and `SystemTime`
4985 * [`SystemTimeError`]
4986 * [`SystemTimeError::duration`]
4987 * Various impls for `SystemTimeError`
4989 * [`AddAssign`], [`SubAssign`], [`MulAssign`], [`DivAssign`],
4990 [`RemAssign`], [`BitAndAssign`], [`BitOrAssign`],
4991 [`BitXorAssign`], [`ShlAssign`], [`ShrAssign`].
4992 * [The `write!` and `writeln!` macros correctly emit errors if any of
4993 their arguments can't be formatted][1.8w].
4994 * [Various I/O functions support large files on 32-bit Linux][1.8l].
4995 * [The Unix-specific `raw` modules, which contain a number of
4996 redefined C types are deprecated][1.8r], including `os::raw::unix`,
4997 `os::raw::macos`, and `os::raw::linux`. These modules defined types
4998 such as `ino_t` and `dev_t`. The inconsistency of these definitions
4999 across platforms was making it difficult to implement `std`
5000 correctly. Those that need these definitions should use the `libc`
5002 * The Unix-specific `MetadataExt` traits, including
5003 `os::unix::fs::MetadataExt`, which expose values such as inode
5004 numbers [no longer return platform-specific types][1.8r], but
5005 instead return widened integers. [RFC 1415].
5006 * [`btree_set::{IntoIter, Iter, Range}` are covariant][1.8cv].
5007 * [Atomic loads and stores are not volatile][1.8a].
5008 * [All types in `sync::mpsc` implement `fmt::Debug`][1.8mp].
5013 * [Inlining hash functions lead to a 3% compile-time improvement in
5014 some workloads][1.8h].
5015 * When using jemalloc, its symbols are [unprefixed so that it
5016 overrides the libc malloc implementation][1.8h]. This means that for
5017 rustc, LLVM is now using jemalloc, which results in a 6%
5018 compile-time improvement on a specific workload.
5019 * [Avoid quadratic growth in function size due to cleanups][1.8cu].
5024 * [32-bit MSVC builds finally implement unwinding][1.8ms].
5025 i686-pc-windows-msvc is now considered a tier-1 platform.
5026 * [The `--print targets` flag prints a list of supported targets][1.8t].
5027 * [The `--print cfg` flag prints the `cfg`s defined for the current
5029 * [`rustc` can be built with an new Cargo-based build system, written
5030 in Rust][1.8b]. It will eventually replace Rust's Makefile-based
5031 build system. To enable it configure with `configure --rustbuild`.
5032 * [Errors for non-exhaustive `match` patterns now list up to 3 missing
5033 variants while also indicating the total number of missing variants
5034 if more than 3][1.8m].
5035 * [Executable stacks are disabled on Linux and BSD][1.8nx].
5036 * The Rust Project now publishes binary releases of the standard
5037 library for a number of tier-2 targets:
5038 `armv7-unknown-linux-gnueabihf`, `powerpc-unknown-linux-gnu`,
5039 `powerpc64-unknown-linux-gnu`, `powerpc64le-unknown-linux-gnu`
5040 `x86_64-rumprun-netbsd`. These can be installed with
5041 tools such as [multirust][1.8mr].
5046 * [`cargo init` creates a new Cargo project in the current
5047 directory][1.8ci]. It is otherwise like `cargo new`.
5048 * [Cargo has configuration keys for `-v` and
5049 `--color`][1.8cc]. `verbose` and `color`, respectively, go in the
5050 `[term]` section of `.cargo/config`.
5051 * [Configuration keys that evaluate to strings or integers can be set
5052 via environment variables][1.8ce]. For example the `build.jobs` key
5053 can be set via `CARGO_BUILD_JOBS`. Environment variables take
5054 precedence over config files.
5055 * [Target-specific dependencies support Rust `cfg` syntax for
5056 describing targets][1.8cfg] so that dependencies for multiple
5057 targets can be specified together. [RFC 1361].
5058 * [The environment variables `CARGO_TARGET_ROOT`, `RUSTC`, and
5059 `RUSTDOC` take precedence over the `build.target-dir`,
5060 `build.rustc`, and `build.rustdoc` configuration values][1.8cv].
5061 * [The child process tree is killed on Windows when Cargo is
5063 * [The `build.target` configuration value sets the target platform,
5064 like `--target`][1.8ct].
5069 * [Unstable compiler flags have been further restricted][1.8u]. Since
5070 1.0 `-Z` flags have been considered unstable, and other flags that
5071 were considered unstable additionally required passing `-Z
5072 unstable-options` to access. Unlike unstable language and library
5073 features though, these options have been accessible on the stable
5074 release channel. Going forward, *new unstable flags will not be
5075 available on the stable release channel*, and old unstable flags
5076 will warn about their usage. In the future, all unstable flags will
5077 be unavailable on the stable release channel.
5078 * [It is no longer possible to `match` on empty enum variants using
5079 the `Variant(..)` syntax][1.8v]. This has been a warning since 1.6.
5080 * The Unix-specific `MetadataExt` traits, including
5081 `os::unix::fs::MetadataExt`, which expose values such as inode
5082 numbers [no longer return platform-specific types][1.8r], but
5083 instead return widened integers. [RFC 1415].
5084 * [Modules sourced from the filesystem cannot appear within arbitrary
5085 blocks, but only within other modules][1.8mf].
5086 * [`--cfg` compiler flags are parsed strictly as identifiers][1.8c].
5087 * On Unix, [stack overflow triggers a runtime abort instead of a
5089 * [`Command::spawn` and its equivalents return an error if any of
5090 its command-line arguments contain interior `NUL`s][1.8n].
5091 * [Tuple and unit enum variants from other crates are in the type
5093 * [On Windows `rustc` emits `.lib` files for the `staticlib` library
5094 type instead of `.a` files][1.8st]. Additionally, for the MSVC
5095 toolchain, `rustc` emits import libraries named `foo.dll.lib`
5096 instead of `foo.lib`.
5099 [1.8a]: https://github.com/rust-lang/rust/pull/30962
5100 [1.8b]: https://github.com/rust-lang/rust/pull/31123
5101 [1.8c]: https://github.com/rust-lang/rust/pull/31530
5102 [1.8cc]: https://github.com/rust-lang/cargo/pull/2397
5103 [1.8ce]: https://github.com/rust-lang/cargo/pull/2398
5104 [1.8cf]: https://github.com/rust-lang/rust/pull/31278
5105 [1.8cfg]: https://github.com/rust-lang/cargo/pull/2328
5106 [1.8ci]: https://github.com/rust-lang/cargo/pull/2081
5107 [1.8ck]: https://github.com/rust-lang/cargo/pull/2370
5108 [1.8ct]: https://github.com/rust-lang/cargo/pull/2335
5109 [1.8cu]: https://github.com/rust-lang/rust/pull/31390
5110 [1.8cv]: https://github.com/rust-lang/cargo/issues/2365
5111 [1.8cv]: https://github.com/rust-lang/rust/pull/30998
5112 [1.8h]: https://github.com/rust-lang/rust/pull/31460
5113 [1.8l]: https://github.com/rust-lang/rust/pull/31668
5114 [1.8m]: https://github.com/rust-lang/rust/pull/31020
5115 [1.8mf]: https://github.com/rust-lang/rust/pull/31534
5116 [1.8mp]: https://github.com/rust-lang/rust/pull/30894
5117 [1.8mr]: https://users.rust-lang.org/t/multirust-0-8-with-cross-std-installation/4901
5118 [1.8ms]: https://github.com/rust-lang/rust/pull/30448
5119 [1.8n]: https://github.com/rust-lang/rust/pull/31056
5120 [1.8nx]: https://github.com/rust-lang/rust/pull/30859
5121 [1.8r]: https://github.com/rust-lang/rust/pull/31551
5122 [1.8so]: https://github.com/rust-lang/rust/pull/31333
5123 [1.8st]: https://github.com/rust-lang/rust/pull/29520
5124 [1.8t]: https://github.com/rust-lang/rust/pull/31358
5125 [1.8tn]: https://github.com/rust-lang/rust/pull/30882
5126 [1.8u]: https://github.com/rust-lang/rust/pull/31793
5127 [1.8v]: https://github.com/rust-lang/rust/pull/31757
5128 [1.8w]: https://github.com/rust-lang/rust/pull/31904
5129 [RFC 1361]: https://github.com/rust-lang/rfcs/blob/master/text/1361-cargo-cfg-dependencies.md
5130 [RFC 1415]: https://github.com/rust-lang/rfcs/blob/master/text/1415-trim-std-os.md
5131 [RFC 218]: https://github.com/rust-lang/rfcs/blob/master/text/0218-empty-struct-with-braces.md
5132 [RFC 953]: https://github.com/rust-lang/rfcs/blob/master/text/0953-op-assign.md
5133 [`AddAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.AddAssign.html
5134 [`BitAndAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitAndAssign.html
5135 [`BitOrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitOrAssign.html
5136 [`BitXorAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitXorAssign.html
5137 [`DivAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.DivAssign.html
5138 [`Instant::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.duration_since
5139 [`Instant::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.elapsed
5140 [`Instant::now`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.now
5141 [`MulAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.MulAssign.html
5142 [`Ref::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.Ref.html#method.map
5143 [`RefMut::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.RefMut.html#method.map
5144 [`RemAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.RemAssign.html
5145 [`ShlAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShlAssign.html
5146 [`ShrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShrAssign.html
5147 [`SubAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.SubAssign.html
5148 [`SystemTime::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.duration_since
5149 [`SystemTime::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.elapsed
5150 [`SystemTime::now`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.now
5151 [`SystemTimeError::duration`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html#method.duration
5152 [`SystemTimeError`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html
5153 [`UNIX_EPOCH`]: http://doc.rust-lang.org/nightly/std/time/constant.UNIX_EPOCH.html
5154 [`ptr::drop_in_place`]: http://doc.rust-lang.org/nightly/std/ptr/fn.drop_in_place.html
5155 [`str::EncodeUtf16`]: http://doc.rust-lang.org/nightly/std/str/struct.EncodeUtf16.html
5156 [`str::encode_utf16`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.encode_utf16
5157 [`time::Instant`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html
5158 [`time::SystemTime`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html
5161 Version 1.7.0 (2016-03-03)
5162 ==========================
5169 * [`Path::strip_prefix`][] (renamed from relative_from)
5170 * [`path::StripPrefixError`][] (new error type returned from strip_prefix)
5172 * [`Ipv4Addr::is_loopback`]
5173 * [`Ipv4Addr::is_private`]
5174 * [`Ipv4Addr::is_link_local`]
5175 * [`Ipv4Addr::is_multicast`]
5176 * [`Ipv4Addr::is_broadcast`]
5177 * [`Ipv4Addr::is_documentation`]
5179 * [`Ipv6Addr::is_unspecified`]
5180 * [`Ipv6Addr::is_loopback`]
5181 * [`Ipv6Addr::is_multicast`]
5184 * [`Vec::as_mut_slice`]
5186 * [`String::as_str`]
5187 * [`String::as_mut_str`]
5189 * `<[T]>::`[`clone_from_slice`], which now requires the two slices to
5191 * `<[T]>::`[`sort_by_key`]
5192 * checked, saturated, and overflowing operations
5193 * [`i32::checked_rem`], [`i32::checked_neg`], [`i32::checked_shl`], [`i32::checked_shr`]
5194 * [`i32::saturating_mul`]
5195 * [`i32::overflowing_add`], [`i32::overflowing_sub`], [`i32::overflowing_mul`], [`i32::overflowing_div`]
5196 * [`i32::overflowing_rem`], [`i32::overflowing_neg`], [`i32::overflowing_shl`], [`i32::overflowing_shr`]
5197 * [`u32::checked_rem`], [`u32::checked_neg`], [`u32::checked_shl`], [`u32::checked_shl`]
5198 * [`u32::saturating_mul`]
5199 * [`u32::overflowing_add`], [`u32::overflowing_sub`], [`u32::overflowing_mul`], [`u32::overflowing_div`]
5200 * [`u32::overflowing_rem`], [`u32::overflowing_neg`], [`u32::overflowing_shl`], [`u32::overflowing_shr`]
5201 * and checked, saturated, and overflowing operations for other primitive types
5203 * [`ffi::IntoStringError`]
5204 * [`CString::into_string`]
5205 * [`CString::into_bytes`]
5206 * [`CString::into_bytes_with_nul`]
5207 * `From<CString> for Vec<u8>`
5209 * [`IntoStringError::into_cstring`]
5210 * [`IntoStringError::utf8_error`]
5211 * `Error for IntoStringError`
5213 * [`std::hash::BuildHasher`]
5214 * [`BuildHasher::Hasher`]
5215 * [`BuildHasher::build_hasher`]
5216 * [`std::hash::BuildHasherDefault`]
5217 * [`HashMap::with_hasher`]
5218 * [`HashMap::with_capacity_and_hasher`]
5219 * [`HashSet::with_hasher`]
5220 * [`HashSet::with_capacity_and_hasher`]
5221 * [`std::collections::hash_map::RandomState`]
5222 * [`RandomState::new`]
5223 * [Validating UTF-8 is faster by a factor of between 7 and 14x for
5224 ASCII input][1.7utf8]. This means that creating `String`s and `str`s
5225 from bytes is faster.
5226 * [The performance of `LineWriter` (and thus `io::stdout`) was
5227 improved by using `memchr` to search for newlines][1.7m].
5228 * [`f32::to_degrees` and `f32::to_radians` are stable][1.7f]. The
5229 `f64` variants were stabilized previously.
5230 * [`BTreeMap` was rewritten to use less memory and improve the performance
5231 of insertion and iteration, the latter by as much as 5x][1.7bm].
5232 * [`BTreeSet` and its iterators, `Iter`, `IntoIter`, and `Range` are
5233 covariant over their contained type][1.7bt].
5234 * [`LinkedList` and its iterators, `Iter` and `IntoIter` are covariant
5235 over their contained type][1.7ll].
5236 * [`str::replace` now accepts a `Pattern`][1.7rp], like other string
5238 * [`Any` is implemented for unsized types][1.7a].
5239 * [`Hash` is implemented for `Duration`][1.7h].
5244 * [When running tests with `--test`, rustdoc will pass `--cfg`
5245 arguments to the compiler][1.7dt].
5246 * [The compiler is built with RPATH information by default][1.7rpa].
5247 This means that it will be possible to run `rustc` when installed in
5248 unusual configurations without configuring the dynamic linker search
5250 * [`rustc` passes `--enable-new-dtags` to GNU ld][1.7dta]. This makes
5251 any RPATH entries (emitted with `-C rpath`) *not* take precedence
5252 over `LD_LIBRARY_PATH`.
5257 * [`cargo rustc` accepts a `--profile` flag that runs `rustc` under
5258 any of the compilation profiles, 'dev', 'bench', or 'test'][1.7cp].
5259 * [The `rerun-if-changed` build script directive no longer causes the
5260 build script to incorrectly run twice in certain scenarios][1.7rr].
5265 * Soundness fixes to the interactions between associated types and
5266 lifetimes, specified in [RFC 1214], [now generate errors][1.7sf] for
5267 code that violates the new rules. This is a significant change that
5268 is known to break existing code, so it has emitted warnings for the
5269 new error cases since 1.4 to give crate authors time to adapt. The
5270 details of what is changing are subtle; read the RFC for more.
5271 * [Several bugs in the compiler's visibility calculations were
5272 fixed][1.7v]. Since this was found to break significant amounts of
5273 code, the new errors will be emitted as warnings for several release
5274 cycles, under the `private_in_public` lint.
5275 * Defaulted type parameters were accidentally accepted in positions
5276 that were not intended. In this release, [defaulted type parameters
5277 appearing outside of type definitions will generate a
5278 warning][1.7d], which will become an error in future releases.
5279 * [Parsing "." as a float results in an error instead of 0][1.7p].
5280 That is, `".".parse::<f32>()` returns `Err`, not `Ok(0.0)`.
5281 * [Borrows of closure parameters may not outlive the closure][1.7bc].
5283 [1.7a]: https://github.com/rust-lang/rust/pull/30928
5284 [1.7bc]: https://github.com/rust-lang/rust/pull/30341
5285 [1.7bm]: https://github.com/rust-lang/rust/pull/30426
5286 [1.7bt]: https://github.com/rust-lang/rust/pull/30998
5287 [1.7cp]: https://github.com/rust-lang/cargo/pull/2224
5288 [1.7d]: https://github.com/rust-lang/rust/pull/30724
5289 [1.7dt]: https://github.com/rust-lang/rust/pull/30372
5290 [1.7dta]: https://github.com/rust-lang/rust/pull/30394
5291 [1.7f]: https://github.com/rust-lang/rust/pull/30672
5292 [1.7h]: https://github.com/rust-lang/rust/pull/30818
5293 [1.7ll]: https://github.com/rust-lang/rust/pull/30663
5294 [1.7m]: https://github.com/rust-lang/rust/pull/30381
5295 [1.7p]: https://github.com/rust-lang/rust/pull/30681
5296 [1.7rp]: https://github.com/rust-lang/rust/pull/29498
5297 [1.7rpa]: https://github.com/rust-lang/rust/pull/30353
5298 [1.7rr]: https://github.com/rust-lang/cargo/pull/2279
5299 [1.7sf]: https://github.com/rust-lang/rust/pull/30389
5300 [1.7utf8]: https://github.com/rust-lang/rust/pull/30740
5301 [1.7v]: https://github.com/rust-lang/rust/pull/29973
5302 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
5303 [`BuildHasher::Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
5304 [`BuildHasher::build_hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html#tymethod.build_hasher
5305 [`CString::into_bytes_with_nul`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes_with_nul
5306 [`CString::into_bytes`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes
5307 [`CString::into_string`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_string
5308 [`HashMap::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_capacity_and_hasher
5309 [`HashMap::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_hasher
5310 [`HashSet::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_capacity_and_hasher
5311 [`HashSet::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_hasher
5312 [`IntoStringError::into_cstring`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.into_cstring
5313 [`IntoStringError::utf8_error`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.utf8_error
5314 [`Ipv4Addr::is_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_broadcast
5315 [`Ipv4Addr::is_documentation`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_documentation
5316 [`Ipv4Addr::is_link_local`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_link_local
5317 [`Ipv4Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_loopback
5318 [`Ipv4Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_multicast
5319 [`Ipv4Addr::is_private`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_private
5320 [`Ipv6Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_loopback
5321 [`Ipv6Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_multicast
5322 [`Ipv6Addr::is_unspecified`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_unspecified
5323 [`Path::strip_prefix`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.strip_prefix
5324 [`RandomState::new`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html#method.new
5325 [`String::as_mut_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_mut_str
5326 [`String::as_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_str
5327 [`Vec::as_mut_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_mut_slice
5328 [`Vec::as_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_slice
5329 [`clone_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.clone_from_slice
5330 [`ffi::IntoStringError`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html
5331 [`i32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_neg
5332 [`i32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_rem
5333 [`i32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shl
5334 [`i32::checked_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shr
5335 [`i32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_add
5336 [`i32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_div
5337 [`i32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_mul
5338 [`i32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_neg
5339 [`i32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_rem
5340 [`i32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shl
5341 [`i32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shr
5342 [`i32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_sub
5343 [`i32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.saturating_mul
5344 [`path::StripPrefixError`]: http://doc.rust-lang.org/nightly/std/path/struct.StripPrefixError.html
5345 [`sort_by_key`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.sort_by_key
5346 [`std::collections::hash_map::RandomState`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html
5347 [`std::hash::BuildHasherDefault`]: http://doc.rust-lang.org/nightly/std/hash/struct.BuildHasherDefault.html
5348 [`std::hash::BuildHasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html
5349 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
5350 [`u32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_rem
5351 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
5352 [`u32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_shl
5353 [`u32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_add
5354 [`u32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_div
5355 [`u32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_mul
5356 [`u32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_neg
5357 [`u32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_rem
5358 [`u32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shl
5359 [`u32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shr
5360 [`u32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_sub
5361 [`u32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.saturating_mul
5364 Version 1.6.0 (2016-01-21)
5365 ==========================
5370 * The `#![no_std]` attribute causes a crate to not be linked to the
5371 standard library, but only the [core library][1.6co], as described
5372 in [RFC 1184]. The core library defines common types and traits but
5373 has no platform dependencies whatsoever, and is the basis for Rust
5374 software in environments that cannot support a full port of the
5375 standard library, such as operating systems. Most of the core
5376 library is now stable.
5382 [`Read::read_exact`],
5383 [`ErrorKind::UnexpectedEof`][] (renamed from `UnexpectedEOF`),
5384 [`fs::DirBuilder`], [`fs::DirBuilder::new`],
5385 [`fs::DirBuilder::recursive`], [`fs::DirBuilder::create`],
5386 [`os::unix::fs::DirBuilderExt`],
5387 [`os::unix::fs::DirBuilderExt::mode`], [`vec::Drain`],
5388 [`vec::Vec::drain`], [`string::Drain`], [`string::String::drain`],
5389 [`vec_deque::Drain`], [`vec_deque::VecDeque::drain`],
5390 [`collections::hash_map::Drain`],
5391 [`collections::hash_map::HashMap::drain`],
5392 [`collections::hash_set::Drain`],
5393 [`collections::hash_set::HashSet::drain`],
5394 [`collections::binary_heap::Drain`],
5395 [`collections::binary_heap::BinaryHeap::drain`],
5396 [`Vec::extend_from_slice`][] (renamed from `push_all`),
5397 [`Mutex::get_mut`], [`Mutex::into_inner`], [`RwLock::get_mut`],
5398 [`RwLock::into_inner`],
5399 [`Iterator::min_by_key`][] (renamed from `min_by`),
5400 [`Iterator::max_by_key`][] (renamed from `max_by`).
5401 * The [core library][1.6co] is stable, as are most of its APIs.
5402 * [The `assert_eq!` macro supports arguments that don't implement
5403 `Sized`][1.6ae], such as arrays. In this way it behaves more like
5405 * Several timer functions that take duration in milliseconds [are
5406 deprecated in favor of those that take `Duration`][1.6ms]. These
5407 include `Condvar::wait_timeout_ms`, `thread::sleep_ms`, and
5408 `thread::park_timeout_ms`.
5409 * The algorithm by which `Vec` reserves additional elements was
5410 [tweaked to not allocate excessive space][1.6a] while still growing
5412 * `From` conversions are [implemented from integers to floats][1.6f]
5413 in cases where the conversion is lossless. Thus they are not
5414 implemented for 32-bit ints to `f32`, nor for 64-bit ints to `f32`
5415 or `f64`. They are also not implemented for `isize` and `usize`
5416 because the implementations would be platform-specific. `From` is
5417 also implemented from `f32` to `f64`.
5418 * `From<&Path>` and `From<PathBuf>` are implemented for `Cow<Path>`.
5419 * `From<T>` is implemented for `Box<T>`, `Rc<T>` and `Arc<T>`.
5420 * `IntoIterator` is implemented for `&PathBuf` and `&Path`.
5421 * [`BinaryHeap` was refactored][1.6bh] for modest performance
5423 * Sorting slices that are already sorted [is 50% faster in some
5429 * Cargo will look in `$CARGO_HOME/bin` for subcommands [by default][1.6c].
5430 * Cargo build scripts can specify their dependencies by emitting the
5431 [`rerun-if-changed`][1.6rr] key.
5432 * crates.io will reject publication of crates with dependencies that
5433 have a wildcard version constraint. Crates with wildcard
5434 dependencies were seen to cause a variety of problems, as described
5435 in [RFC 1241]. Since 1.5 publication of such crates has emitted a
5437 * `cargo clean` [accepts a `--release` flag][1.6cc] to clean the
5438 release folder. A variety of artifacts that Cargo failed to clean
5439 are now correctly deleted.
5444 * The `unreachable_code` lint [warns when a function call's argument
5446 * The parser indicates [failures that may be caused by
5447 confusingly-similar Unicode characters][1.6uc]
5448 * Certain macro errors [are reported at definition time][1.6m], not
5454 * The compiler no longer makes use of the [`RUST_PATH`][1.6rp]
5455 environment variable when locating crates. This was a pre-cargo
5456 feature for integrating with the package manager that was
5457 accidentally never removed.
5458 * [A number of bugs were fixed in the privacy checker][1.6p] that
5459 could cause previously-accepted code to break.
5460 * [Modules and unit/tuple structs may not share the same name][1.6ts].
5461 * [Bugs in pattern matching unit structs were fixed][1.6us]. The tuple
5462 struct pattern syntax (`Foo(..)`) can no longer be used to match
5463 unit structs. This is a warning now, but will become an error in
5464 future releases. Patterns that share the same name as a const are
5466 * A bug was fixed that causes [rustc not to apply default type
5467 parameters][1.6xc] when resolving certain method implementations of
5468 traits defined in other crates.
5470 [1.6a]: https://github.com/rust-lang/rust/pull/29454
5471 [1.6ae]: https://github.com/rust-lang/rust/pull/29770
5472 [1.6bh]: https://github.com/rust-lang/rust/pull/29811
5473 [1.6c]: https://github.com/rust-lang/cargo/pull/2192
5474 [1.6cc]: https://github.com/rust-lang/cargo/pull/2131
5475 [1.6co]: http://doc.rust-lang.org/core/index.html
5476 [1.6dv]: https://github.com/rust-lang/rust/pull/30000
5477 [1.6f]: https://github.com/rust-lang/rust/pull/29129
5478 [1.6m]: https://github.com/rust-lang/rust/pull/29828
5479 [1.6ms]: https://github.com/rust-lang/rust/pull/29604
5480 [1.6p]: https://github.com/rust-lang/rust/pull/29726
5481 [1.6rp]: https://github.com/rust-lang/rust/pull/30034
5482 [1.6rr]: https://github.com/rust-lang/cargo/pull/2134
5483 [1.6s]: https://github.com/rust-lang/rust/pull/29675
5484 [1.6ts]: https://github.com/rust-lang/rust/issues/21546
5485 [1.6uc]: https://github.com/rust-lang/rust/pull/29837
5486 [1.6us]: https://github.com/rust-lang/rust/pull/29383
5487 [1.6xc]: https://github.com/rust-lang/rust/issues/30123
5488 [RFC 1184]: https://github.com/rust-lang/rfcs/blob/master/text/1184-stabilize-no_std.md
5489 [RFC 1241]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
5490 [`ErrorKind::UnexpectedEof`]: http://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html#variant.UnexpectedEof
5491 [`Iterator::max_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.max_by_key
5492 [`Iterator::min_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.min_by_key
5493 [`Mutex::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.get_mut
5494 [`Mutex::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.into_inner
5495 [`Read::read_exact`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_exact
5496 [`RwLock::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.get_mut
5497 [`RwLock::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.into_inner
5498 [`Vec::extend_from_slice`]: http://doc.rust-lang.org/nightly/collections/vec/struct.Vec.html#method.extend_from_slice
5499 [`collections::binary_heap::BinaryHeap::drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.BinaryHeap.html#method.drain
5500 [`collections::binary_heap::Drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.Drain.html
5501 [`collections::hash_map::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.Drain.html
5502 [`collections::hash_map::HashMap::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.HashMap.html#method.drain
5503 [`collections::hash_set::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.Drain.html
5504 [`collections::hash_set::HashSet::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.HashSet.html#method.drain
5505 [`fs::DirBuilder::create`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.create
5506 [`fs::DirBuilder::new`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.new
5507 [`fs::DirBuilder::recursive`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.recursive
5508 [`fs::DirBuilder`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html
5509 [`os::unix::fs::DirBuilderExt::mode`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html#tymethod.mode
5510 [`os::unix::fs::DirBuilderExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html
5511 [`string::Drain`]: http://doc.rust-lang.org/nightly/std/string/struct.Drain.html
5512 [`string::String::drain`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.drain
5513 [`vec::Drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Drain.html
5514 [`vec::Vec::drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.drain
5515 [`vec_deque::Drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.Drain.html
5516 [`vec_deque::VecDeque::drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.VecDeque.html#method.drain
5519 Version 1.5.0 (2015-12-10)
5520 ==========================
5522 * ~700 changes, numerous bugfixes
5528 [`BinaryHeap::from`], [`BinaryHeap::into_sorted_vec`],
5529 [`BinaryHeap::into_vec`], [`Condvar::wait_timeout`],
5530 [`FileTypeExt::is_block_device`], [`FileTypeExt::is_char_device`],
5531 [`FileTypeExt::is_fifo`], [`FileTypeExt::is_socket`],
5532 [`FileTypeExt`], [`Formatter::alternate`], [`Formatter::fill`],
5533 [`Formatter::precision`], [`Formatter::sign_aware_zero_pad`],
5534 [`Formatter::sign_minus`], [`Formatter::sign_plus`],
5535 [`Formatter::width`], [`Iterator::cmp`], [`Iterator::eq`],
5536 [`Iterator::ge`], [`Iterator::gt`], [`Iterator::le`],
5537 [`Iterator::lt`], [`Iterator::ne`], [`Iterator::partial_cmp`],
5538 [`Path::canonicalize`], [`Path::exists`], [`Path::is_dir`],
5539 [`Path::is_file`], [`Path::metadata`], [`Path::read_dir`],
5540 [`Path::read_link`], [`Path::symlink_metadata`],
5541 [`Utf8Error::valid_up_to`], [`Vec::resize`],
5542 [`VecDeque::as_mut_slices`], [`VecDeque::as_slices`],
5543 [`VecDeque::insert`], [`VecDeque::shrink_to_fit`],
5544 [`VecDeque::swap_remove_back`], [`VecDeque::swap_remove_front`],
5545 [`slice::split_first_mut`], [`slice::split_first`],
5546 [`slice::split_last_mut`], [`slice::split_last`],
5547 [`char::from_u32_unchecked`], [`fs::canonicalize`],
5548 [`str::MatchIndices`], [`str::RMatchIndices`],
5549 [`str::match_indices`], [`str::rmatch_indices`],
5550 [`str::slice_mut_unchecked`], [`string::ParseError`].
5551 * Rust applications hosted on crates.io can be installed locally to
5552 `~/.cargo/bin` with the [`cargo install`] command. Among other
5553 things this makes it easier to augment Cargo with new subcommands:
5554 when a binary named e.g. `cargo-foo` is found in `$PATH` it can be
5555 invoked as `cargo foo`.
5556 * Crates with wildcard (`*`) dependencies will [emit warnings when
5557 published][1.5w]. In 1.6 it will no longer be possible to publish
5558 crates with wildcard dependencies.
5563 * The rules determining when a particular lifetime must outlive
5564 a particular value (known as '[dropck]') have been [modified
5565 to not rely on parametricity][1.5p].
5566 * [Implementations of `AsRef` and `AsMut` were added to `Box`, `Rc`,
5567 and `Arc`][1.5a]. Because these smart pointer types implement
5568 `Deref`, this causes breakage in cases where the interior type
5569 contains methods of the same name.
5570 * [Correct a bug in Rc/Arc][1.5c] that caused [dropck] to be unaware
5571 that they could drop their content. Soundness fix.
5572 * All method invocations are [properly checked][1.5wf1] for
5573 [well-formedness][1.5wf2]. Soundness fix.
5574 * Traits whose supertraits contain `Self` are [not object
5575 safe][1.5o]. Soundness fix.
5576 * Target specifications support a [`no_default_libraries`][1.5nd]
5577 setting that controls whether `-nodefaultlibs` is passed to the
5578 linker, and in turn the `is_like_windows` setting no longer affects
5579 the `-nodefaultlibs` flag.
5580 * `#[derive(Show)]`, long-deprecated, [has been removed][1.5ds].
5581 * The `#[inline]` and `#[repr]` attributes [can only appear
5582 in valid locations][1.5at].
5583 * Native libraries linked from the local crate are [passed to
5584 the linker before native libraries from upstream crates][1.5nl].
5585 * Two rarely-used attributes, `#[no_debug]` and
5586 `#[omit_gdb_pretty_printer_section]` [are feature gated][1.5fg].
5587 * Negation of unsigned integers, which has been a warning for
5588 several releases, [is now behind a feature gate and will
5589 generate errors][1.5nu].
5590 * The parser accidentally accepted visibility modifiers on
5591 enum variants, a bug [which has been fixed][1.5ev].
5592 * [A bug was fixed that allowed `use` statements to import unstable
5598 * When evaluating expressions at compile-time that are not
5599 compile-time constants (const-evaluating expressions in non-const
5600 contexts), incorrect code such as overlong bitshifts and arithmetic
5601 overflow will [generate a warning instead of an error][1.5ce],
5602 delaying the error until runtime. This will allow the
5603 const-evaluator to be expanded in the future backwards-compatibly.
5604 * The `improper_ctypes` lint [no longer warns about using `isize` and
5605 `usize` in FFI][1.5ict].
5610 * `Arc<T>` and `Rc<T>` are [covariant with respect to `T` instead of
5612 * `Default` is [implemented for mutable slices][1.5d].
5613 * `FromStr` is [implemented for `SockAddrV4` and `SockAddrV6`][1.5s].
5614 * There are now `From` conversions [between floating point
5615 types][1.5f] where the conversions are lossless.
5616 * There are now `From` conversions [between integer types][1.5i] where
5617 the conversions are lossless.
5618 * [`fs::Metadata` implements `Clone`][1.5fs].
5619 * The `parse` method [accepts a leading "+" when parsing
5621 * [`AsMut` is implemented for `Vec`][1.5am].
5622 * The `clone_from` implementations for `String` and `BinaryHeap` [have
5623 been optimized][1.5cf] and no longer rely on the default impl.
5624 * The `extern "Rust"`, `extern "C"`, `unsafe extern "Rust"` and
5625 `unsafe extern "C"` function types now [implement `Clone`,
5626 `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and
5627 `fmt::Debug` for up to 12 arguments][1.5fp].
5628 * [Dropping `Vec`s is much faster in unoptimized builds when the
5629 element types don't implement `Drop`][1.5dv].
5630 * A bug that caused in incorrect behavior when [combining `VecDeque`
5631 with zero-sized types][1.5vdz] was resolved.
5632 * [`PartialOrd` for slices is faster][1.5po].
5637 * [Crate metadata size was reduced by 20%][1.5md].
5638 * [Improvements to code generation reduced the size of libcore by 3.3
5639 MB and rustc's memory usage by 18MB][1.5m].
5640 * [Improvements to deref translation increased performance in
5641 unoptimized builds][1.5dr].
5642 * Various errors in trait resolution [are deduplicated to only be
5643 reported once][1.5te].
5644 * Rust has preliminary [support for rumprun kernels][1.5rr].
5645 * Rust has preliminary [support for NetBSD on amd64][1.5na].
5647 [1.5use]: https://github.com/rust-lang/rust/pull/28364
5648 [1.5po]: https://github.com/rust-lang/rust/pull/28436
5649 [1.5ev]: https://github.com/rust-lang/rust/pull/28442
5650 [1.5nu]: https://github.com/rust-lang/rust/pull/28468
5651 [1.5dr]: https://github.com/rust-lang/rust/pull/28491
5652 [1.5vdz]: https://github.com/rust-lang/rust/pull/28494
5653 [1.5md]: https://github.com/rust-lang/rust/pull/28521
5654 [1.5fg]: https://github.com/rust-lang/rust/pull/28522
5655 [1.5dv]: https://github.com/rust-lang/rust/pull/28531
5656 [1.5na]: https://github.com/rust-lang/rust/pull/28543
5657 [1.5fp]: https://github.com/rust-lang/rust/pull/28560
5658 [1.5rr]: https://github.com/rust-lang/rust/pull/28593
5659 [1.5cf]: https://github.com/rust-lang/rust/pull/28602
5660 [1.5nl]: https://github.com/rust-lang/rust/pull/28605
5661 [1.5te]: https://github.com/rust-lang/rust/pull/28645
5662 [1.5at]: https://github.com/rust-lang/rust/pull/28650
5663 [1.5am]: https://github.com/rust-lang/rust/pull/28663
5664 [1.5m]: https://github.com/rust-lang/rust/pull/28778
5665 [1.5ict]: https://github.com/rust-lang/rust/pull/28779
5666 [1.5a]: https://github.com/rust-lang/rust/pull/28811
5667 [1.5pi]: https://github.com/rust-lang/rust/pull/28826
5668 [1.5ce]: https://github.com/rust-lang/rfcs/blob/master/text/1229-compile-time-asserts.md
5669 [1.5p]: https://github.com/rust-lang/rfcs/blob/master/text/1238-nonparametric-dropck.md
5670 [1.5i]: https://github.com/rust-lang/rust/pull/28921
5671 [1.5fs]: https://github.com/rust-lang/rust/pull/29021
5672 [1.5f]: https://github.com/rust-lang/rust/pull/29129
5673 [1.5ds]: https://github.com/rust-lang/rust/pull/29148
5674 [1.5s]: https://github.com/rust-lang/rust/pull/29190
5675 [1.5d]: https://github.com/rust-lang/rust/pull/29245
5676 [1.5o]: https://github.com/rust-lang/rust/pull/29259
5677 [1.5nd]: https://github.com/rust-lang/rust/pull/28578
5678 [1.5wf2]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
5679 [1.5wf1]: https://github.com/rust-lang/rust/pull/28669
5680 [dropck]: https://doc.rust-lang.org/nightly/nomicon/dropck.html
5681 [1.5c]: https://github.com/rust-lang/rust/pull/29110
5682 [1.5w]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
5683 [`cargo install`]: https://github.com/rust-lang/rfcs/blob/master/text/1200-cargo-install.md
5684 [`BinaryHeap::from`]: http://doc.rust-lang.org/nightly/std/convert/trait.From.html#method.from
5685 [`BinaryHeap::into_sorted_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_sorted_vec
5686 [`BinaryHeap::into_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_vec
5687 [`Condvar::wait_timeout`]: http://doc.rust-lang.org/nightly/std/sync/struct.Condvar.html#method.wait_timeout
5688 [`FileTypeExt::is_block_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_block_device
5689 [`FileTypeExt::is_char_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_char_device
5690 [`FileTypeExt::is_fifo`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_fifo
5691 [`FileTypeExt::is_socket`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_socket
5692 [`FileTypeExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html
5693 [`Formatter::alternate`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.alternate
5694 [`Formatter::fill`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.fill
5695 [`Formatter::precision`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.precision
5696 [`Formatter::sign_aware_zero_pad`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_aware_zero_pad
5697 [`Formatter::sign_minus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_minus
5698 [`Formatter::sign_plus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_plus
5699 [`Formatter::width`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.width
5700 [`Iterator::cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.cmp
5701 [`Iterator::eq`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.eq
5702 [`Iterator::ge`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ge
5703 [`Iterator::gt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.gt
5704 [`Iterator::le`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.le
5705 [`Iterator::lt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.lt
5706 [`Iterator::ne`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ne
5707 [`Iterator::partial_cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.partial_cmp
5708 [`Path::canonicalize`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.canonicalize
5709 [`Path::exists`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.exists
5710 [`Path::is_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_dir
5711 [`Path::is_file`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_file
5712 [`Path::metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.metadata
5713 [`Path::read_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_dir
5714 [`Path::read_link`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_link
5715 [`Path::symlink_metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.symlink_metadata
5716 [`Utf8Error::valid_up_to`]: http://doc.rust-lang.org/nightly/core/str/struct.Utf8Error.html#method.valid_up_to
5717 [`Vec::resize`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.resize
5718 [`VecDeque::as_mut_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_mut_slices
5719 [`VecDeque::as_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_slices
5720 [`VecDeque::insert`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.insert
5721 [`VecDeque::shrink_to_fit`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.shrink_to_fit
5722 [`VecDeque::swap_remove_back`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_back
5723 [`VecDeque::swap_remove_front`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_front
5724 [`slice::split_first_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first_mut
5725 [`slice::split_first`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first
5726 [`slice::split_last_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last_mut
5727 [`slice::split_last`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last
5728 [`char::from_u32_unchecked`]: http://doc.rust-lang.org/nightly/std/char/fn.from_u32_unchecked.html
5729 [`fs::canonicalize`]: http://doc.rust-lang.org/nightly/std/fs/fn.canonicalize.html
5730 [`str::MatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.MatchIndices.html
5731 [`str::RMatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.RMatchIndices.html
5732 [`str::match_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.match_indices
5733 [`str::rmatch_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatch_indices
5734 [`str::slice_mut_unchecked`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.slice_mut_unchecked
5735 [`string::ParseError`]: http://doc.rust-lang.org/nightly/std/string/enum.ParseError.html
5737 Version 1.4.0 (2015-10-29)
5738 ==========================
5740 * ~1200 changes, numerous bugfixes
5745 * Windows builds targeting the 64-bit MSVC ABI and linker (instead of
5746 GNU) are now supported and recommended for use.
5751 * [Several changes have been made to fix type soundness and improve
5752 the behavior of associated types][sound]. See [RFC 1214]. Although
5753 we have mostly introduced these changes as warnings this release, to
5754 become errors next release, there are still some scenarios that will
5755 see immediate breakage.
5756 * [The `str::lines` and `BufRead::lines` iterators treat `\r\n` as
5757 line breaks in addition to `\n`][crlf].
5758 * [Loans of `'static` lifetime extend to the end of a function][stat].
5759 * [`str::parse` no longer introduces avoidable rounding error when
5760 parsing floating point numbers. Together with earlier changes to
5761 float formatting/output, "round trips" like f.to_string().parse()
5762 now preserve the value of f exactly. Additionally, leading plus
5763 signs are now accepted][fp3].
5769 * `use` statements that import multiple items [can now rename
5770 them][i], as in `use foo::{bar as kitten, baz as puppy}`.
5771 * [Binops work correctly on fat pointers][binfat].
5772 * `pub extern crate`, which does not behave as expected, [issues a
5773 warning][pec] until a better solution is found.
5778 * [Many APIs were stabilized][stab]: `<Box<str>>::into_string`,
5779 [`Arc::downgrade`], [`Arc::get_mut`], [`Arc::make_mut`],
5780 [`Arc::try_unwrap`], [`Box::from_raw`], [`Box::into_raw`], [`CStr::to_str`],
5781 [`CStr::to_string_lossy`], [`CString::from_raw`], [`CString::into_raw`],
5782 [`IntoRawFd::into_raw_fd`], [`IntoRawFd`],
5783 `IntoRawHandle::into_raw_handle`, `IntoRawHandle`,
5784 `IntoRawSocket::into_raw_socket`, `IntoRawSocket`, [`Rc::downgrade`],
5785 [`Rc::get_mut`], [`Rc::make_mut`], [`Rc::try_unwrap`], [`Result::expect`],
5786 [`String::into_boxed_str`], [`TcpStream::read_timeout`],
5787 [`TcpStream::set_read_timeout`], [`TcpStream::set_write_timeout`],
5788 [`TcpStream::write_timeout`], [`UdpSocket::read_timeout`],
5789 [`UdpSocket::set_read_timeout`], [`UdpSocket::set_write_timeout`],
5790 [`UdpSocket::write_timeout`], `Vec::append`, `Vec::split_off`,
5791 [`VecDeque::append`], [`VecDeque::retain`], [`VecDeque::split_off`],
5792 [`rc::Weak::upgrade`], [`rc::Weak`], [`slice::Iter::as_slice`],
5793 [`slice::IterMut::into_slice`], [`str::CharIndices::as_str`],
5794 [`str::Chars::as_str`], [`str::split_at_mut`], [`str::split_at`],
5795 [`sync::Weak::upgrade`], [`sync::Weak`], [`thread::park_timeout`],
5797 * [Some APIs were deprecated][dep]: `BTreeMap::with_b`,
5798 `BTreeSet::with_b`, `Option::as_mut_slice`, `Option::as_slice`,
5799 `Result::as_mut_slice`, `Result::as_slice`, `f32::from_str_radix`,
5800 `f64::from_str_radix`.
5801 * [Reverse-searching strings is faster with the 'two-way'
5803 * [`std::io::copy` allows `?Sized` arguments][cc].
5804 * The `Windows`, `Chunks`, and `ChunksMut` iterators over slices all
5805 [override `count`, `nth` and `last` with an O(1)
5806 implementation][it].
5807 * [`Default` is implemented for arrays up to `[T; 32]`][d].
5808 * [`IntoRawFd` has been added to the Unix-specific prelude,
5809 `IntoRawSocket` and `IntoRawHandle` to the Windows-specific
5811 * [`Extend<String>` and `FromIterator<String` are both implemented for
5813 * [`IntoIterator` is implemented for references to `Option` and
5815 * [`HashMap` and `HashSet` implement `Extend<&T>` where `T:
5816 Copy`][ext] as part of [RFC 839]. This will cause type inference
5817 breakage in rare situations.
5818 * [`BinaryHeap` implements `Debug`][bh2].
5819 * [`Borrow` and `BorrowMut` are implemented for fixed-size
5821 * [`extern fn`s with the "Rust" and "C" ABIs implement common
5822 traits including `Eq`, `Ord`, `Debug`, `Hash`][fp].
5823 * [String comparison is faster][faststr].
5824 * `&mut T` where `T: std::fmt::Write` [also implements
5825 `std::fmt::Write`][mutw].
5826 * [A stable regression in `VecDeque::push_back` and other
5827 capacity-altering methods that caused panics for zero-sized types
5829 * [Function pointers implement traits for up to 12 parameters][fp2].
5834 * The compiler [no longer uses the 'morestack' feature to prevent
5835 stack overflow][mm]. Instead it uses guard pages and stack
5836 probes (though stack probes are not yet implemented on any platform
5838 * [The compiler matches traits faster when projections are involved][p].
5839 * The 'improper_ctypes' lint [no longer warns about use of `isize` and
5841 * [Cargo now displays useful information about what its doing during
5842 `cargo update`][cu].
5844 [`Arc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.downgrade
5845 [`Arc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.make_mut
5846 [`Arc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.get_mut
5847 [`Arc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.try_unwrap
5848 [`Box::from_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.from_raw
5849 [`Box::into_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.into_raw
5850 [`CStr::to_str`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_str
5851 [`CStr::to_string_lossy`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_string_lossy
5852 [`CString::from_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.from_raw
5853 [`CString::into_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_raw
5854 [`IntoRawFd::into_raw_fd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html#tymethod.into_raw_fd
5855 [`IntoRawFd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html
5856 [`Rc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.downgrade
5857 [`Rc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.get_mut
5858 [`Rc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.make_mut
5859 [`Rc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.try_unwrap
5860 [`Result::expect`]: http://doc.rust-lang.org/nightly/core/result/enum.Result.html#method.expect
5861 [`String::into_boxed_str`]: http://doc.rust-lang.org/nightly/collections/string/struct.String.html#method.into_boxed_str
5862 [`TcpStream::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
5863 [`TcpStream::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
5864 [`TcpStream::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
5865 [`TcpStream::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
5866 [`UdpSocket::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
5867 [`UdpSocket::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
5868 [`UdpSocket::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
5869 [`UdpSocket::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
5870 [`VecDeque::append`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.append
5871 [`VecDeque::retain`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.retain
5872 [`VecDeque::split_off`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.split_off
5873 [`rc::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html#method.upgrade
5874 [`rc::Weak`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html
5875 [`slice::Iter::as_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.Iter.html#method.as_slice
5876 [`slice::IterMut::into_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.IterMut.html#method.into_slice
5877 [`str::CharIndices::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.CharIndices.html#method.as_str
5878 [`str::Chars::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.Chars.html#method.as_str
5879 [`str::split_at_mut`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at_mut
5880 [`str::split_at`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at
5881 [`sync::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html#method.upgrade
5882 [`sync::Weak`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html
5883 [`thread::park_timeout`]: http://doc.rust-lang.org/nightly/std/thread/fn.park_timeout.html
5884 [`thread::sleep`]: http://doc.rust-lang.org/nightly/std/thread/fn.sleep.html
5885 [bh2]: https://github.com/rust-lang/rust/pull/28156
5886 [binfat]: https://github.com/rust-lang/rust/pull/28270
5887 [bm]: https://github.com/rust-lang/rust/pull/28197
5888 [cc]: https://github.com/rust-lang/rust/pull/27531
5889 [crlf]: https://github.com/rust-lang/rust/pull/28034
5890 [cu]: https://github.com/rust-lang/cargo/pull/1931
5891 [d]: https://github.com/rust-lang/rust/pull/27825
5892 [dep]: https://github.com/rust-lang/rust/pull/28339
5893 [es]: https://github.com/rust-lang/rust/pull/27956
5894 [ext]: https://github.com/rust-lang/rust/pull/28094
5895 [faststr]: https://github.com/rust-lang/rust/pull/28338
5896 [ffi]: https://github.com/rust-lang/rust/pull/28779
5897 [fp]: https://github.com/rust-lang/rust/pull/28268
5898 [fp2]: https://github.com/rust-lang/rust/pull/28560
5899 [fp3]: https://github.com/rust-lang/rust/pull/27307
5900 [i]: https://github.com/rust-lang/rust/pull/27451
5901 [into2]: https://github.com/rust-lang/rust/pull/28039
5902 [it]: https://github.com/rust-lang/rust/pull/27652
5903 [mm]: https://github.com/rust-lang/rust/pull/27338
5904 [mutw]: https://github.com/rust-lang/rust/pull/28368
5905 [sound]: https://github.com/rust-lang/rust/pull/27641
5906 [p]: https://github.com/rust-lang/rust/pull/27866
5907 [pec]: https://github.com/rust-lang/rust/pull/28486
5908 [pr]: https://github.com/rust-lang/rust/pull/27896
5909 [RFC 839]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
5910 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
5911 [s]: https://github.com/rust-lang/rust/pull/27474
5912 [stab]: https://github.com/rust-lang/rust/pull/28339
5913 [stat]: https://github.com/rust-lang/rust/pull/28321
5914 [vd]: https://github.com/rust-lang/rust/pull/28494
5916 Version 1.3.0 (2015-09-17)
5917 ==============================
5919 * ~900 changes, numerous bugfixes
5924 * The [new object lifetime defaults][nold] have been [turned
5925 on][nold2] after a cycle of warnings about the change. Now types
5926 like `&'a Box<Trait>` (or `&'a Rc<Trait>`, etc) will change from
5927 being interpreted as `&'a Box<Trait+'a>` to `&'a
5928 Box<Trait+'static>`.
5929 * [The Rustonomicon][nom] is a new book in the official documentation
5930 that dives into writing unsafe Rust.
5931 * The [`Duration`] API, [has been stabilized][ds]. This basic unit of
5932 timekeeping is employed by other std APIs, as well as out-of-tree
5938 * The [new object lifetime defaults][nold] have been [turned
5939 on][nold2] after a cycle of warnings about the change.
5940 * There is a known [regression][lr] in how object lifetime elision is
5941 interpreted, the proper solution for which is undetermined.
5942 * The `#[prelude_import]` attribute, an internal implementation
5943 detail, was accidentally stabilized previously. [It has been put
5944 behind the `prelude_import` feature gate][pi]. This change is
5945 believed to break no existing code.
5946 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
5947 [more sane for dynamically sized types][dst3]. Code that relied on
5948 the previous behavior is thought to be broken.
5949 * The `dropck` rules, which checks that destructors can't access
5950 destroyed values, [have been updated][dropck] to match the
5951 [RFC][dropckrfc]. This fixes some soundness holes, and as such will
5952 cause some previously-compiling code to no longer build.
5957 * The [new object lifetime defaults][nold] have been [turned
5958 on][nold2] after a cycle of warnings about the change.
5959 * Semicolons may [now follow types and paths in
5960 macros](https://github.com/rust-lang/rust/pull/27000).
5961 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
5962 [more sane for dynamically sized types][dst3]. Code that relied on
5963 the previous behavior is not known to exist, and suspected to be
5965 * `'static` variables [may now be recursive][st].
5966 * `ref` bindings choose between [`Deref`] and [`DerefMut`]
5967 implementations correctly.
5968 * The `dropck` rules, which checks that destructors can't access
5969 destroyed values, [have been updated][dropck] to match the
5975 * The [`Duration`] API, [has been stabilized][ds], as well as the
5976 `std::time` module, which presently contains only `Duration`.
5977 * `Box<str>` and `Box<[T]>` both implement `Clone`.
5978 * The owned C string, [`CString`], implements [`Borrow`] and the
5979 borrowed C string, [`CStr`], implements [`ToOwned`]. The two of
5980 these allow C strings to be borrowed and cloned in generic code.
5981 * [`CStr`] implements [`Debug`].
5982 * [`AtomicPtr`] implements [`Debug`].
5983 * [`Error`] trait objects [can be downcast to their concrete types][e]
5984 in many common configurations, using the [`is`], [`downcast`],
5985 [`downcast_ref`] and [`downcast_mut`] methods, similarly to the
5987 * Searching for substrings now [employs the two-way algorithm][search]
5988 instead of doing a naive search. This gives major speedups to a
5989 number of methods, including [`contains`][sc], [`find`][sf],
5990 [`rfind`][srf], [`split`][ss]. [`starts_with`][ssw] and
5991 [`ends_with`][sew] are also faster.
5992 * The performance of `PartialEq` for slices is [much faster][ps].
5993 * The [`Hash`] trait offers the default method, [`hash_slice`], which
5994 is overridden and optimized by the implementations for scalars.
5995 * The [`Hasher`] trait now has a number of specialized `write_*`
5996 methods for primitive types, for efficiency.
5997 * The I/O-specific error type, [`std::io::Error`][ie], gained a set of
5998 methods for accessing the 'inner error', if any: [`get_ref`][iegr],
5999 [`get_mut`][iegm], [`into_inner`][ieii]. As well, the implementation
6000 of [`std::error::Error::cause`][iec] also delegates to the inner
6002 * [`process::Child`][pc] gained the [`id`] method, which returns a
6003 `u32` representing the platform-specific process identifier.
6004 * The [`connect`] method on slices is deprecated, replaced by the new
6005 [`join`] method (note that both of these are on the *unstable*
6006 [`SliceConcatExt`] trait, but through the magic of the prelude are
6007 available to stable code anyway).
6008 * The [`Div`] operator is implemented for [`Wrapping`] types.
6009 * [`DerefMut` is implemented for `String`][dms].
6010 * Performance of SipHash (the default hasher for `HashMap`) is
6011 [better for long data][sh].
6012 * [`AtomicPtr`] implements [`Send`].
6013 * The [`read_to_end`] implementations for [`Stdin`] and [`File`]
6014 are now [specialized to use uninitialized buffers for increased
6016 * Lifetime parameters of foreign functions [are now resolved
6022 * Rust can now, with some coercion, [produce programs that run on
6023 Windows XP][xp], though XP is not considered a supported platform.
6024 * Porting Rust on Windows from the GNU toolchain to MSVC continues
6025 ([1][win1], [2][win2], [3][win3], [4][win4]). It is still not
6026 recommended for use in 1.3, though should be fully-functional
6027 in the [64-bit 1.4 beta][b14].
6028 * On Fedora-based systems installation will [properly configure the
6029 dynamic linker][fl].
6030 * The compiler gained many new extended error descriptions, which can
6031 be accessed with the `--explain` flag.
6032 * The `dropck` pass, which checks that destructors can't access
6033 destroyed values, [has been rewritten][dropck]. This fixes some
6034 soundness holes, and as such will cause some previously-compiling
6035 code to no longer build.
6036 * `rustc` now uses [LLVM to write archive files where possible][ar].
6037 Eventually this will eliminate the compiler's dependency on the ar
6039 * Rust has [preliminary support for i686 FreeBSD][fb] (it has long
6040 supported FreeBSD on x86_64).
6041 * The [`unused_mut`][lum], [`unconditional_recursion`][lur],
6042 [`improper_ctypes`][lic], and [`negate_unsigned`][lnu] lints are
6044 * If landing pads are disabled (with `-Z no-landing-pads`), [`panic!`
6045 will kill the process instead of leaking][nlp].
6047 [`Any`]: http://doc.rust-lang.org/nightly/std/any/trait.Any.html
6048 [`AtomicPtr`]: http://doc.rust-lang.org/nightly/std/sync/atomic/struct.AtomicPtr.html
6049 [`Borrow`]: http://doc.rust-lang.org/nightly/std/borrow/trait.Borrow.html
6050 [`CStr`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html
6051 [`CString`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html
6052 [`Debug`]: http://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
6053 [`DerefMut`]: http://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
6054 [`Deref`]: http://doc.rust-lang.org/nightly/std/ops/trait.Deref.html
6055 [`Div`]: http://doc.rust-lang.org/nightly/std/ops/trait.Div.html
6056 [`Duration`]: http://doc.rust-lang.org/nightly/std/time/struct.Duration.html
6057 [`Error`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html
6058 [`File`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html
6059 [`Hash`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html
6060 [`Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
6061 [`Send`]: http://doc.rust-lang.org/nightly/std/marker/trait.Send.html
6062 [`SliceConcatExt`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html
6063 [`Stdin`]: http://doc.rust-lang.org/nightly/std/io/struct.Stdin.html
6064 [`ToOwned`]: http://doc.rust-lang.org/nightly/std/borrow/trait.ToOwned.html
6065 [`Wrapping`]: http://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
6066 [`connect`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.connect
6067 [`downcast_mut`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_mut
6068 [`downcast_ref`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_ref
6069 [`downcast`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast
6070 [`hash_slice`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
6071 [`id`]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html#method.id
6072 [`is`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.is
6073 [`join`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.join
6074 [`read_to_end`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_to_end
6075 [ar]: https://github.com/rust-lang/rust/pull/26926
6076 [b14]: https://static.rust-lang.org/dist/rust-beta-x86_64-pc-windows-msvc.msi
6077 [dms]: https://github.com/rust-lang/rust/pull/26241
6078 [dropck]: https://github.com/rust-lang/rust/pull/27261
6079 [dropckrfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
6080 [ds]: https://github.com/rust-lang/rust/pull/26818
6081 [dst1]: http://doc.rust-lang.org/nightly/std/mem/fn.size_of_val.html
6082 [dst2]: http://doc.rust-lang.org/nightly/std/mem/fn.align_of_val.html
6083 [dst3]: https://github.com/rust-lang/rust/pull/27351
6084 [e]: https://github.com/rust-lang/rust/pull/24793
6085 [f]: https://github.com/rust-lang/rust/pull/26588
6086 [fb]: https://github.com/rust-lang/rust/pull/26959
6087 [fl]: https://github.com/rust-lang/rust-installer/pull/41
6088 [hs]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
6089 [ie]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html
6090 [iec]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.cause
6091 [iegm]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_mut
6092 [iegr]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_ref
6093 [ieii]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.into_inner
6094 [lic]: https://github.com/rust-lang/rust/pull/26583
6095 [lnu]: https://github.com/rust-lang/rust/pull/27026
6096 [lr]: https://github.com/rust-lang/rust/issues/27248
6097 [lum]: https://github.com/rust-lang/rust/pull/26378
6098 [lur]: https://github.com/rust-lang/rust/pull/26783
6099 [nlp]: https://github.com/rust-lang/rust/pull/27176
6100 [nold2]: https://github.com/rust-lang/rust/pull/27045
6101 [nold]: https://github.com/rust-lang/rfcs/blob/master/text/1156-adjust-default-object-bounds.md
6102 [nom]: http://doc.rust-lang.org/nightly/nomicon/
6103 [pc]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html
6104 [pi]: https://github.com/rust-lang/rust/pull/26699
6105 [ps]: https://github.com/rust-lang/rust/pull/26884
6106 [rte]: https://github.com/rust-lang/rust/pull/26950
6107 [sc]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.contains
6108 [search]: https://github.com/rust-lang/rust/pull/26327
6109 [sew]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.ends_with
6110 [sf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.find
6111 [sh]: https://github.com/rust-lang/rust/pull/27280
6112 [srf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rfind
6113 [ss]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split
6114 [ssw]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.starts_with
6115 [st]: https://github.com/rust-lang/rust/pull/26630
6116 [win1]: https://github.com/rust-lang/rust/pull/26569
6117 [win2]: https://github.com/rust-lang/rust/pull/26741
6118 [win3]: https://github.com/rust-lang/rust/pull/26741
6119 [win4]: https://github.com/rust-lang/rust/pull/27210
6120 [xp]: https://github.com/rust-lang/rust/pull/26569
6122 Version 1.2.0 (2015-08-07)
6123 ==========================
6125 * ~1200 changes, numerous bugfixes
6130 * [Dynamically-sized-type coercions][dst] allow smart pointer types
6131 like `Rc` to contain types without a fixed size, arrays and trait
6132 objects, finally enabling use of `Rc<[T]>` and completing the
6133 implementation of DST.
6134 * [Parallel codegen][parcodegen] is now working again, which can
6135 substantially speed up large builds in debug mode; It also gets
6136 another ~33% speedup when bootstrapping on a 4 core machine (using 8
6137 jobs). It's not enabled by default, but will be "in the near
6138 future". It can be activated with the `-C codegen-units=N` flag to
6140 * This is the first release with [experimental support for linking
6141 with the MSVC linker and lib C on Windows (instead of using the GNU
6142 variants via MinGW)][win]. It is yet recommended only for the most
6143 intrepid Rustaceans.
6144 * Benchmark compilations are showing a 30% improvement in
6145 bootstrapping over 1.1.
6150 * The [`to_uppercase`] and [`to_lowercase`] methods on `char` now do
6151 unicode case mapping, which is a previously-planned change in
6152 behavior and considered a bugfix.
6153 * [`mem::align_of`] now specifies [the *minimum alignment* for
6154 T][align], which is usually the alignment programs are interested
6155 in, and the same value reported by clang's
6156 `alignof`. [`mem::min_align_of`] is deprecated. This is not known to
6158 * [The `#[packed]` attribute is no longer silently accepted by the
6159 compiler][packed]. This attribute did nothing and code that
6160 mentioned it likely did not work as intended.
6161 * Associated type defaults are [now behind the
6162 `associated_type_defaults` feature gate][ad]. In 1.1 associated type
6163 defaults *did not work*, but could be mentioned syntactically. As
6164 such this breakage has minimal impact.
6169 * Patterns with `ref mut` now correctly invoke [`DerefMut`] when
6170 matching against dereferenceable values.
6175 * The [`Extend`] trait, which grows a collection from an iterator, is
6176 implemented over iterators of references, for `String`, `Vec`,
6177 `LinkedList`, `VecDeque`, `EnumSet`, `BinaryHeap`, `VecMap`,
6178 `BTreeSet` and `BTreeMap`. [RFC][extend-rfc].
6179 * The [`iter::once`] function returns an iterator that yields a single
6180 element, and [`iter::empty`] returns an iterator that yields no
6182 * The [`matches`] and [`rmatches`] methods on `str` return iterators
6183 over substring matches.
6184 * [`Cell`] and [`RefCell`] both implement `Eq`.
6185 * A number of methods for wrapping arithmetic are added to the
6186 integral types, [`wrapping_div`], [`wrapping_rem`],
6187 [`wrapping_neg`], [`wrapping_shl`], [`wrapping_shr`]. These are in
6188 addition to the existing [`wrapping_add`], [`wrapping_sub`], and
6189 [`wrapping_mul`] methods, and alternatives to the [`Wrapping`]
6190 type.. It is illegal for the default arithmetic operations in Rust
6191 to overflow; the desire to wrap must be explicit.
6192 * The `{:#?}` formatting specifier [displays the alternate,
6193 pretty-printed][debugfmt] form of the `Debug` formatter. This
6194 feature was actually introduced prior to 1.0 with little
6196 * [`fmt::Formatter`] implements [`fmt::Write`], a `fmt`-specific trait
6197 for writing data to formatted strings, similar to [`io::Write`].
6198 * [`fmt::Formatter`] adds 'debug builder' methods, [`debug_struct`],
6199 [`debug_tuple`], [`debug_list`], [`debug_set`], [`debug_map`]. These
6200 are used by code generators to emit implementations of [`Debug`].
6201 * `str` has new [`to_uppercase`][strup] and [`to_lowercase`][strlow]
6202 methods that convert case, following Unicode case mapping.
6203 * It is now easier to handle poisoned locks. The [`PoisonError`]
6204 type, returned by failing lock operations, exposes `into_inner`,
6205 `get_ref`, and `get_mut`, which all give access to the inner lock
6206 guard, and allow the poisoned lock to continue to operate. The
6207 `is_poisoned` method of [`RwLock`] and [`Mutex`] can poll for a
6208 poisoned lock without attempting to take the lock.
6209 * On Unix the [`FromRawFd`] trait is implemented for [`Stdio`], and
6210 [`AsRawFd`] for [`ChildStdin`], [`ChildStdout`], [`ChildStderr`].
6211 On Windows the `FromRawHandle` trait is implemented for `Stdio`,
6212 and `AsRawHandle` for `ChildStdin`, `ChildStdout`,
6214 * [`io::ErrorKind`] has a new variant, `InvalidData`, which indicates
6220 * `rustc` employs smarter heuristics for guessing at [typos].
6221 * `rustc` emits more efficient code for [no-op conversions between
6222 unsafe pointers][nop].
6223 * Fat pointers are now [passed in pairs of immediate arguments][fat],
6224 resulting in faster compile times and smaller code.
6226 [`Extend`]: https://doc.rust-lang.org/nightly/std/iter/trait.Extend.html
6227 [extend-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
6228 [`iter::once`]: https://doc.rust-lang.org/nightly/std/iter/fn.once.html
6229 [`iter::empty`]: https://doc.rust-lang.org/nightly/std/iter/fn.empty.html
6230 [`matches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.matches
6231 [`rmatches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatches
6232 [`Cell`]: https://doc.rust-lang.org/nightly/std/cell/struct.Cell.html
6233 [`RefCell`]: https://doc.rust-lang.org/nightly/std/cell/struct.RefCell.html
6234 [`wrapping_add`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_add
6235 [`wrapping_sub`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_sub
6236 [`wrapping_mul`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_mul
6237 [`wrapping_div`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_div
6238 [`wrapping_rem`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_rem
6239 [`wrapping_neg`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_neg
6240 [`wrapping_shl`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shl
6241 [`wrapping_shr`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shr
6242 [`Wrapping`]: https://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
6243 [`fmt::Formatter`]: https://doc.rust-lang.org/nightly/std/fmt/struct.Formatter.html
6244 [`fmt::Write`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Write.html
6245 [`io::Write`]: https://doc.rust-lang.org/nightly/std/io/trait.Write.html
6246 [`debug_struct`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_struct
6247 [`debug_tuple`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_tuple
6248 [`debug_list`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_list
6249 [`debug_set`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_set
6250 [`debug_map`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_map
6251 [`Debug`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
6252 [strup]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_uppercase
6253 [strlow]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_lowercase
6254 [`to_uppercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_uppercase
6255 [`to_lowercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_lowercase
6256 [`PoisonError`]: https://doc.rust-lang.org/nightly/std/sync/struct.PoisonError.html
6257 [`RwLock`]: https://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html
6258 [`Mutex`]: https://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html
6259 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
6260 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
6261 [`Stdio`]: https://doc.rust-lang.org/nightly/std/process/struct.Stdio.html
6262 [`ChildStdin`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdin.html
6263 [`ChildStdout`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdout.html
6264 [`ChildStderr`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStderr.html
6265 [`io::ErrorKind`]: https://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html
6266 [debugfmt]: https://www.reddit.com/r/rust/comments/3ceaui/psa_produces_prettyprinted_debug_output/
6267 [`DerefMut`]: https://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
6268 [`mem::align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.align_of.html
6269 [align]: https://github.com/rust-lang/rust/pull/25646
6270 [`mem::min_align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.min_align_of.html
6271 [typos]: https://github.com/rust-lang/rust/pull/26087
6272 [nop]: https://github.com/rust-lang/rust/pull/26336
6273 [fat]: https://github.com/rust-lang/rust/pull/26411
6274 [dst]: https://github.com/rust-lang/rfcs/blob/master/text/0982-dst-coercion.md
6275 [parcodegen]: https://github.com/rust-lang/rust/pull/26018
6276 [packed]: https://github.com/rust-lang/rust/pull/25541
6277 [ad]: https://github.com/rust-lang/rust/pull/27382
6278 [win]: https://github.com/rust-lang/rust/pull/25350
6280 Version 1.1.0 (2015-06-25)
6281 =========================
6283 * ~850 changes, numerous bugfixes
6288 * The [`std::fs` module has been expanded][fs] to expand the set of
6289 functionality exposed:
6290 * `DirEntry` now supports optimizations like `file_type` and `metadata` which
6291 don't incur a syscall on some platforms.
6292 * A `symlink_metadata` function has been added.
6293 * The `fs::Metadata` structure now lowers to its OS counterpart, providing
6294 access to all underlying information.
6295 * The compiler now contains extended explanations of many errors. When an error
6296 with an explanation occurs the compiler suggests using the `--explain` flag
6297 to read the explanation. Error explanations are also [available online][err-index].
6298 * Thanks to multiple [improvements][sk] to [type checking][pre], as
6299 well as other work, the time to bootstrap the compiler decreased by
6305 * The [`str::split_whitespace`] method splits a string on unicode
6306 whitespace boundaries.
6307 * On both Windows and Unix, new extension traits provide conversion of
6308 I/O types to and from the underlying system handles. On Unix, these
6309 traits are [`FromRawFd`] and [`AsRawFd`], on Windows `FromRawHandle`
6310 and `AsRawHandle`. These are implemented for `File`, `TcpStream`,
6311 `TcpListener`, and `UpdSocket`. Further implementations for
6312 `std::process` will be stabilized later.
6313 * On Unix, [`std::os::unix::symlink`] creates symlinks. On
6314 Windows, symlinks can be created with
6315 `std::os::windows::symlink_dir` and
6316 `std::os::windows::symlink_file`.
6317 * The `mpsc::Receiver` type can now be converted into an iterator with
6318 `into_iter` on the [`IntoIterator`] trait.
6319 * `Ipv4Addr` can be created from `u32` with the `From<u32>`
6320 implementation of the [`From`] trait.
6321 * The `Debug` implementation for `RangeFull` [creates output that is
6322 more consistent with other implementations][rf].
6323 * [`Debug` is implemented for `File`][file].
6324 * The `Default` implementation for `Arc` [no longer requires `Sync +
6326 * [The `Iterator` methods `count`, `nth`, and `last` have been
6327 overridden for slices to have O(1) performance instead of O(n)][si].
6328 * Incorrect handling of paths on Windows has been improved in both the
6329 compiler and the standard library.
6330 * [`AtomicPtr` gained a `Default` implementation][ap].
6331 * In accordance with Rust's policy on arithmetic overflow `abs` now
6332 [panics on overflow when debug assertions are enabled][abs].
6333 * The [`Cloned`] iterator, which was accidentally left unstable for
6334 1.0 [has been stabilized][c].
6335 * The [`Incoming`] iterator, which iterates over incoming TCP
6336 connections, and which was accidentally unnamable in 1.0, [is now
6337 properly exported][inc].
6338 * [`BinaryHeap`] no longer corrupts itself [when functions called by
6339 `sift_up` or `sift_down` panic][bh].
6340 * The [`split_off`] method of `LinkedList` [no longer corrupts
6341 the list in certain scenarios][ll].
6346 * Type checking performance [has improved notably][sk] with
6347 [multiple improvements][pre].
6348 * The compiler [suggests code changes][ch] for more errors.
6349 * rustc and it's build system have experimental support for [building
6350 toolchains against MUSL][m] instead of glibc on Linux.
6351 * The compiler defines the `target_env` cfg value, which is used for
6352 distinguishing toolchains that are otherwise for the same
6353 platform. Presently this is set to `gnu` for common GNU Linux
6354 targets and for MinGW targets, and `musl` for MUSL Linux targets.
6355 * The [`cargo rustc`][crc] command invokes a build with custom flags
6357 * [Android executables are always position independent][pie].
6358 * [The `drop_with_repr_extern` lint warns about mixing `repr(C)`
6361 [`str::split_whitespace`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_whitespace
6362 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
6363 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
6364 [`std::os::unix::symlink`]: https://doc.rust-lang.org/nightly/std/os/unix/fs/fn.symlink.html
6365 [`IntoIterator`]: https://doc.rust-lang.org/nightly/std/iter/trait.IntoIterator.html
6366 [`From`]: https://doc.rust-lang.org/nightly/std/convert/trait.From.html
6367 [rf]: https://github.com/rust-lang/rust/pull/24491
6368 [err-index]: https://doc.rust-lang.org/error-index.html
6369 [sk]: https://github.com/rust-lang/rust/pull/24615
6370 [pre]: https://github.com/rust-lang/rust/pull/25323
6371 [file]: https://github.com/rust-lang/rust/pull/24598
6372 [ch]: https://github.com/rust-lang/rust/pull/24683
6373 [arc]: https://github.com/rust-lang/rust/pull/24695
6374 [si]: https://github.com/rust-lang/rust/pull/24701
6375 [ap]: https://github.com/rust-lang/rust/pull/24834
6376 [m]: https://github.com/rust-lang/rust/pull/24777
6377 [fs]: https://github.com/rust-lang/rfcs/blob/master/text/1044-io-fs-2.1.md
6378 [crc]: https://github.com/rust-lang/cargo/pull/1568
6379 [pie]: https://github.com/rust-lang/rust/pull/24953
6380 [abs]: https://github.com/rust-lang/rust/pull/25441
6381 [c]: https://github.com/rust-lang/rust/pull/25496
6382 [`Cloned`]: https://doc.rust-lang.org/nightly/std/iter/struct.Cloned.html
6383 [`Incoming`]: https://doc.rust-lang.org/nightly/std/net/struct.Incoming.html
6384 [inc]: https://github.com/rust-lang/rust/pull/25522
6385 [bh]: https://github.com/rust-lang/rust/pull/25856
6386 [`BinaryHeap`]: https://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html
6387 [ll]: https://github.com/rust-lang/rust/pull/26022
6388 [`split_off`]: https://doc.rust-lang.org/nightly/collections/linked_list/struct.LinkedList.html#method.split_off
6389 [drop]: https://github.com/rust-lang/rust/pull/24935
6391 Version 1.0.0 (2015-05-15)
6392 ========================
6394 * ~1500 changes, numerous bugfixes
6399 * The vast majority of the standard library is now `#[stable]`. It is
6400 no longer possible to use unstable features with a stable build of
6402 * Many popular crates on [crates.io] now work on the stable release
6404 * Arithmetic on basic integer types now [checks for overflow in debug
6410 * Several [restrictions have been added to trait coherence][coh] in
6411 order to make it easier for upstream authors to change traits
6412 without breaking downstream code.
6413 * Digits of binary and octal literals are [lexed more eagerly][lex] to
6414 improve error messages and macro behavior. For example, `0b1234` is
6415 now lexed as `0b1234` instead of two tokens, `0b1` and `234`.
6416 * Trait bounds [are always invariant][inv], eliminating the need for
6417 the `PhantomFn` and `MarkerTrait` lang items, which have been
6419 * ["-" is no longer a valid character in crate names][cr], the `extern crate
6420 "foo" as bar` syntax has been replaced with `extern crate foo as
6421 bar`, and Cargo now automatically translates "-" in *package* names
6422 to underscore for the crate name.
6423 * [Lifetime shadowing is an error][lt].
6424 * [`Send` no longer implies `'static`][send-rfc].
6425 * [UFCS now supports trait-less associated paths][moar-ufcs] like
6426 `MyType::default()`.
6427 * Primitive types [now have inherent methods][prim-inherent],
6428 obviating the need for extension traits like `SliceExt`.
6429 * Methods with `Self: Sized` in their `where` clause are [considered
6430 object-safe][self-sized], allowing many extension traits like
6431 `IteratorExt` to be merged into the traits they extended.
6432 * You can now [refer to associated types][assoc-where] whose
6433 corresponding trait bounds appear only in a `where` clause.
6434 * The final bits of [OIBIT landed][oibit-final], meaning that traits
6435 like `Send` and `Sync` are now library-defined.
6436 * A [Reflect trait][reflect] was introduced, which means that
6437 downcasting via the `Any` trait is effectively limited to concrete
6438 types. This helps retain the potentially-important "parametricity"
6439 property: generic code cannot behave differently for different type
6440 arguments except in minor ways.
6441 * The `unsafe_destructor` feature is now deprecated in favor of the
6442 [new `dropck`][dropck]. This change is a major reduction in unsafe
6448 * The `thread_local` module [has been renamed to `std::thread`][th].
6449 * The methods of `IteratorExt` [have been moved to the `Iterator`
6451 * Several traits that implement Rust's conventions for type
6452 conversions, `AsMut`, `AsRef`, `From`, and `Into` have been
6453 [centralized in the `std::convert` module][con].
6454 * The `FromError` trait [was removed in favor of `From`][fe].
6455 * The basic sleep function [has moved to
6456 `std::thread::sleep_ms`][slp].
6457 * The `splitn` function now takes an `n` parameter that represents the
6458 number of items yielded by the returned iterator [instead of the
6459 number of 'splits'][spl].
6460 * [On Unix, all file descriptors are `CLOEXEC` by default][clo].
6461 * [Derived implementations of `PartialOrd` now order enums according
6462 to their explicitly-assigned discriminants][po].
6463 * [Methods for searching strings are generic over `Pattern`s][pat],
6464 implemented presently by `&char`, `&str`, `FnMut(char) -> bool` and
6466 * [In method resolution, object methods are resolved before inherent
6468 * [`String::from_str` has been deprecated in favor of the `From` impl,
6469 `String::from`][sf].
6470 * [`io::Error` implements `Sync`][ios].
6471 * [The `words` method on `&str` has been replaced with
6472 `split_whitespace`][sw], to avoid answering the tricky question, 'what is
6474 * The new path and IO modules are complete and `#[stable]`. This
6475 was the major library focus for this cycle.
6476 * The path API was [revised][path-normalize] to normalize `.`,
6477 adjusting the tradeoffs in favor of the most common usage.
6478 * A large number of remaining APIs in `std` were also stabilized
6479 during this cycle; about 75% of the non-deprecated API surface
6481 * The new [string pattern API][string-pattern] landed, which makes
6482 the string slice API much more internally consistent and flexible.
6483 * A new set of [generic conversion traits][conversion] replaced
6484 many existing ad hoc traits.
6485 * Generic numeric traits were [completely removed][num-traits]. This
6486 was made possible thanks to inherent methods for primitive types,
6487 and the removal gives maximal flexibility for designing a numeric
6488 hierarchy in the future.
6489 * The `Fn` traits are now related via [inheritance][fn-inherit]
6490 and provide ergonomic [blanket implementations][fn-blanket].
6491 * The `Index` and `IndexMut` traits were changed to
6492 [take the index by value][index-value], enabling code like
6493 `hash_map["string"]` to work.
6494 * `Copy` now [inherits][copy-clone] from `Clone`, meaning that all
6495 `Copy` data is known to be `Clone` as well.
6500 * Many errors now have extended explanations that can be accessed with
6501 the `--explain` flag to `rustc`.
6502 * Many new examples have been added to the standard library
6504 * rustdoc has received a number of improvements focused on completion
6506 * Metadata was tuned, shrinking binaries [by 27%][metadata-shrink].
6507 * Much headway was made on ecosystem-wide CI, making it possible
6508 to [compare builds for breakage][ci-compare].
6511 [crates.io]: http://crates.io
6512 [clo]: https://github.com/rust-lang/rust/pull/24034
6513 [coh]: https://github.com/rust-lang/rfcs/blob/master/text/1023-rebalancing-coherence.md
6514 [con]: https://github.com/rust-lang/rust/pull/23875
6515 [cr]: https://github.com/rust-lang/rust/pull/23419
6516 [fe]: https://github.com/rust-lang/rust/pull/23879
6517 [ie]: https://github.com/rust-lang/rust/pull/23300
6518 [inv]: https://github.com/rust-lang/rust/pull/23938
6519 [ios]: https://github.com/rust-lang/rust/pull/24133
6520 [lex]: https://github.com/rust-lang/rfcs/blob/master/text/0879-small-base-lexing.md
6521 [lt]: https://github.com/rust-lang/rust/pull/24057
6522 [meth]: https://github.com/rust-lang/rust/pull/24056
6523 [pat]: https://github.com/rust-lang/rfcs/blob/master/text/0528-string-patterns.md
6524 [po]: https://github.com/rust-lang/rust/pull/24270
6525 [sf]: https://github.com/rust-lang/rust/pull/24517
6526 [slp]: https://github.com/rust-lang/rust/pull/23949
6527 [spl]: https://github.com/rust-lang/rfcs/blob/master/text/0979-align-splitn-with-other-languages.md
6528 [sw]: https://github.com/rust-lang/rfcs/blob/master/text/1054-str-words.md
6529 [th]: https://github.com/rust-lang/rfcs/blob/master/text/0909-move-thread-local-to-std-thread.md
6530 [send-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0458-send-improvements.md
6531 [moar-ufcs]: https://github.com/rust-lang/rust/pull/22172
6532 [prim-inherent]: https://github.com/rust-lang/rust/pull/23104
6533 [overflow]: https://github.com/rust-lang/rfcs/blob/master/text/0560-integer-overflow.md
6534 [metadata-shrink]: https://github.com/rust-lang/rust/pull/22971
6535 [self-sized]: https://github.com/rust-lang/rust/pull/22301
6536 [assoc-where]: https://github.com/rust-lang/rust/pull/22512
6537 [string-pattern]: https://github.com/rust-lang/rust/pull/22466
6538 [oibit-final]: https://github.com/rust-lang/rust/pull/21689
6539 [reflect]: https://github.com/rust-lang/rust/pull/23712
6540 [conversion]: https://github.com/rust-lang/rfcs/pull/529
6541 [num-traits]: https://github.com/rust-lang/rust/pull/23549
6542 [index-value]: https://github.com/rust-lang/rust/pull/23601
6543 [dropck]: https://github.com/rust-lang/rfcs/pull/769
6544 [ci-compare]: https://gist.github.com/brson/a30a77836fbec057cbee
6545 [fn-inherit]: https://github.com/rust-lang/rust/pull/23282
6546 [fn-blanket]: https://github.com/rust-lang/rust/pull/23895
6547 [copy-clone]: https://github.com/rust-lang/rust/pull/23860
6548 [path-normalize]: https://github.com/rust-lang/rust/pull/23229
6551 Version 1.0.0-alpha.2 (2015-02-20)
6552 =====================================
6554 * ~1300 changes, numerous bugfixes
6558 * The various I/O modules were [overhauled][io-rfc] to reduce
6559 unnecessary abstractions and provide better interoperation with
6560 the underlying platform. The old `io` module remains temporarily
6562 * The standard library now [participates in feature gating][feat],
6563 so use of unstable libraries now requires a `#![feature(...)]`
6564 attribute. The impact of this change is [described on the
6565 forum][feat-forum]. [RFC][feat-rfc].
6569 * `for` loops [now operate on the `IntoIterator` trait][into],
6570 which eliminates the need to call `.iter()`, etc. to iterate
6571 over collections. There are some new subtleties to remember
6572 though regarding what sort of iterators various types yield, in
6573 particular that `for foo in bar { }` yields values from a move
6574 iterator, destroying the original collection. [RFC][into-rfc].
6575 * Objects now have [default lifetime bounds][obj], so you don't
6576 have to write `Box<Trait+'static>` when you don't care about
6577 storing references. [RFC][obj-rfc].
6578 * In types that implement `Drop`, [lifetimes must outlive the
6579 value][drop]. This will soon make it possible to safely
6580 implement `Drop` for types where `#[unsafe_destructor]` is now
6581 required. Read the [gorgeous RFC][drop-rfc] for details.
6582 * The fully qualified <T as Trait>::X syntax lets you set the Self
6583 type for a trait method or associated type. [RFC][ufcs-rfc].
6584 * References to types that implement `Deref<U>` now [automatically
6585 coerce to references][deref] to the dereferenced type `U`,
6586 e.g. `&T where T: Deref<U>` automatically coerces to `&U`. This
6587 should eliminate many unsightly uses of `&*`, as when converting
6588 from references to vectors into references to
6589 slices. [RFC][deref-rfc].
6590 * The explicit [closure kind syntax][close] (`|&:|`, `|&mut:|`,
6591 `|:|`) is obsolete and closure kind is inferred from context.
6592 * [`Self` is a keyword][Self].
6596 * The `Show` and `String` formatting traits [have been
6597 renamed][fmt] to `Debug` and `Display` to more clearly reflect
6598 their related purposes. Automatically getting a string
6599 conversion to use with `format!("{:?}", something_to_debug)` is
6600 now written `#[derive(Debug)]`.
6601 * Abstract [OS-specific string types][osstr], `std::ff::{OsString,
6602 OsStr}`, provide strings in platform-specific encodings for easier
6603 interop with system APIs. [RFC][osstr-rfc].
6604 * The `boxed::into_raw` and `Box::from_raw` functions [convert
6605 between `Box<T>` and `*mut T`][boxraw], a common pattern for
6606 creating raw pointers.
6610 * Certain long error messages of the form 'expected foo found bar'
6611 are now [split neatly across multiple
6612 lines][multiline]. Examples in the PR.
6613 * On Unix Rust can be [uninstalled][un] by running
6614 `/usr/local/lib/rustlib/uninstall.sh`.
6615 * The `#[rustc_on_unimplemented]` attribute, requiring the
6616 'on_unimplemented' feature, lets rustc [display custom error
6617 messages when a trait is expected to be implemented for a type
6622 * Rust is tested against a [LALR grammar][lalr], which parses
6623 almost all the Rust files that rustc does.
6625 [boxraw]: https://github.com/rust-lang/rust/pull/21318
6626 [close]: https://github.com/rust-lang/rust/pull/21843
6627 [deref]: https://github.com/rust-lang/rust/pull/21351
6628 [deref-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0241-deref-conversions.md
6629 [drop]: https://github.com/rust-lang/rust/pull/21972
6630 [drop-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
6631 [feat]: https://github.com/rust-lang/rust/pull/21248
6632 [feat-forum]: https://users.rust-lang.org/t/psa-important-info-about-rustcs-new-feature-staging/82/5
6633 [feat-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0507-release-channels.md
6634 [fmt]: https://github.com/rust-lang/rust/pull/21457
6635 [into]: https://github.com/rust-lang/rust/pull/20790
6636 [into-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md#intoiterator-and-iterable
6637 [io-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
6638 [lalr]: https://github.com/rust-lang/rust/pull/21452
6639 [multiline]: https://github.com/rust-lang/rust/pull/19870
6640 [obj]: https://github.com/rust-lang/rust/pull/22230
6641 [obj-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0599-default-object-bound.md
6642 [onun]: https://github.com/rust-lang/rust/pull/20889
6643 [osstr]: https://github.com/rust-lang/rust/pull/21488
6644 [osstr-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
6645 [Self]: https://github.com/rust-lang/rust/pull/22158
6646 [ufcs-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0132-ufcs.md
6647 [un]: https://github.com/rust-lang/rust/pull/22256
6650 Version 1.0.0-alpha (2015-01-09)
6651 ==================================
6653 * ~2400 changes, numerous bugfixes
6657 * The language itself is considered feature complete for 1.0,
6658 though there will be many usability improvements and bugfixes
6659 before the final release.
6660 * Nearly 50% of the public API surface of the standard library has
6661 been declared 'stable'. Those interfaces are unlikely to change
6663 * The long-running debate over integer types has been
6664 [settled][ints]: Rust will ship with types named `isize` and
6665 `usize`, rather than `int` and `uint`, for pointer-sized
6666 integers. Guidelines will be rolled out during the alpha cycle.
6667 * Most crates that are not `std` have been moved out of the Rust
6668 distribution into the Cargo ecosystem so they can evolve
6669 separately and don't need to be stabilized as quickly, including
6670 'time', 'getopts', 'num', 'regex', and 'term'.
6671 * Documentation continues to be expanded with more API coverage, more
6672 examples, and more in-depth explanations. The guides have been
6673 consolidated into [The Rust Programming Language][trpl].
6674 * "[Rust By Example][rbe]" is now maintained by the Rust team.
6675 * All official Rust binary installers now come with [Cargo], the
6676 Rust package manager.
6680 * Closures have been [completely redesigned][unboxed] to be
6681 implemented in terms of traits, can now be used as generic type
6682 bounds and thus monomorphized and inlined, or via an opaque
6683 pointer (boxed) as in the old system. The new system is often
6684 referred to as 'unboxed' closures.
6685 * Traits now support [associated types][assoc], allowing families
6686 of related types to be defined together and used generically in
6688 * Enum variants are [namespaced by their type names][enum].
6689 * [`where` clauses][where] provide a more versatile and attractive
6690 syntax for specifying generic bounds, though the previous syntax
6692 * Rust again picks a [fallback][fb] (either i32 or f64) for uninferred
6694 * Rust [no longer has a runtime][rt] of any description, and only
6695 supports OS threads, not green threads.
6696 * At long last, Rust has been overhauled for 'dynamically-sized
6697 types' ([DST]), which integrates 'fat pointers' (object types,
6698 arrays, and `str`) more deeply into the type system, making it
6700 * Rust now has a general [range syntax][range], `i..j`, `i..`, and
6701 `..j` that produce range types and which, when combined with the
6702 `Index` operator and multidispatch, leads to a convenient slice
6704 * The new range syntax revealed an ambiguity in the fixed-length
6705 array syntax, so now fixed length arrays [are written `[T;
6707 * The `Copy` trait is no longer implemented automatically. Unsafe
6708 pointers no longer implement `Sync` and `Send` so types
6709 containing them don't automatically either. `Sync` and `Send`
6710 are now 'unsafe traits' so one can "forcibly" implement them via
6711 `unsafe impl` if a type confirms to the requirements for them
6712 even though the internals do not (e.g. structs containing unsafe
6713 pointers like `Arc`). These changes are intended to prevent some
6714 footguns and are collectively known as [opt-in built-in
6715 traits][oibit] (though `Sync` and `Send` will soon become pure
6716 library types unknown to the compiler).
6717 * Operator traits now take their operands [by value][ops], and
6718 comparison traits can use multidispatch to compare one type
6719 against multiple other types, allowing e.g. `String` to be
6720 compared with `&str`.
6721 * `if let` and `while let` are no longer feature-gated.
6722 * Rust has adopted a more [uniform syntax for escaping unicode
6723 characters][unicode].
6724 * `macro_rules!` [has been declared stable][mac]. Though it is a
6725 flawed system it is sufficiently popular that it must be usable
6726 for 1.0. Effort has gone into [future-proofing][mac-future] it
6727 in ways that will allow other macro systems to be developed in
6728 parallel, and won't otherwise impact the evolution of the
6730 * The prelude has been [pared back significantly][prelude] such
6731 that it is the minimum necessary to support the most pervasive
6732 code patterns, and through [generalized where clauses][where]
6733 many of the prelude extension traits have been consolidated.
6734 * Rust's rudimentary reflection [has been removed][refl], as it
6735 incurred too much code generation for little benefit.
6736 * [Struct variants][structvars] are no longer feature-gated.
6737 * Trait bounds can be [polymorphic over lifetimes][hrtb]. Also
6738 known as 'higher-ranked trait bounds', this crucially allows
6739 unboxed closures to work.
6740 * Macros invocations surrounded by parens or square brackets and
6741 not terminated by a semicolon are [parsed as
6742 expressions][macros], which makes expressions like `vec![1i32,
6743 2, 3].len()` work as expected.
6744 * Trait objects now implement their traits automatically, and
6745 traits that can be coerced to objects now must be [object
6747 * Automatically deriving traits is now done with `#[derive(...)]`
6748 not `#[deriving(...)]` for [consistency with other naming
6749 conventions][derive].
6750 * Importing the containing module or enum at the same time as
6751 items or variants they contain is [now done with `self` instead
6752 of `mod`][self], as in use `foo::{self, bar}`
6753 * Glob imports are no longer feature-gated.
6754 * The `box` operator and `box` patterns have been feature-gated
6755 pending a redesign. For now unique boxes should be allocated
6756 like other containers, with `Box::new`.
6760 * A [series][coll1] of [efforts][coll2] to establish
6761 [conventions][coll3] for collections types has resulted in API
6762 improvements throughout the standard library.
6763 * New [APIs for error handling][err] provide ergonomic interop
6764 between error types, and [new conventions][err-conv] describe
6765 more clearly the recommended error handling strategies in Rust.
6766 * The `fail!` macro has been renamed to [`panic!`][panic] so that
6767 it is easier to discuss failure in the context of error handling
6768 without making clarifications as to whether you are referring to
6769 the 'fail' macro or failure more generally.
6770 * On Linux, `OsRng` prefers the new, more reliable `getrandom`
6771 syscall when available.
6772 * The 'serialize' crate has been renamed 'rustc-serialize' and
6773 moved out of the distribution to Cargo. Although it is widely
6774 used now, it is expected to be superseded in the near future.
6775 * The `Show` formatter, typically implemented with
6776 `#[derive(Show)]` is [now requested with the `{:?}`
6777 specifier][show] and is intended for use by all types, for uses
6778 such as `println!` debugging. The new `String` formatter must be
6779 implemented by hand, uses the `{}` specifier, and is intended
6780 for full-fidelity conversions of things that can logically be
6781 represented as strings.
6785 * [Flexible target specification][flex] allows rustc's code
6786 generation to be configured to support otherwise-unsupported
6788 * Rust comes with rust-gdb and rust-lldb scripts that launch their
6789 respective debuggers with Rust-appropriate pretty-printing.
6790 * The Windows installation of Rust is distributed with the
6791 MinGW components currently required to link binaries on that
6796 * Nullable enum optimizations have been extended to more types so
6797 that e.g. `Option<Vec<T>>` and `Option<String>` take up no more
6798 space than the inner types themselves.
6799 * Work has begun on supporting AArch64.
6801 [Cargo]: https://crates.io
6802 [unboxed]: http://smallcultfollowing.com/babysteps/blog/2014/11/26/purging-proc/
6803 [enum]: https://github.com/rust-lang/rfcs/blob/master/text/0390-enum-namespacing.md
6804 [flex]: https://github.com/rust-lang/rfcs/blob/master/text/0131-target-specification.md
6805 [err]: https://github.com/rust-lang/rfcs/blob/master/text/0201-error-chaining.md
6806 [err-conv]: https://github.com/rust-lang/rfcs/blob/master/text/0236-error-conventions.md
6807 [rt]: https://github.com/rust-lang/rfcs/blob/master/text/0230-remove-runtime.md
6808 [mac]: https://github.com/rust-lang/rfcs/blob/master/text/0453-macro-reform.md
6809 [mac-future]: https://github.com/rust-lang/rfcs/pull/550
6810 [DST]: http://smallcultfollowing.com/babysteps/blog/2014/01/05/dst-take-5/
6811 [coll1]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md
6812 [coll2]: https://github.com/rust-lang/rfcs/blob/master/text/0509-collections-reform-part-2.md
6813 [coll3]: https://github.com/rust-lang/rfcs/blob/master/text/0216-collection-views.md
6814 [ops]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md
6815 [prelude]: https://github.com/rust-lang/rfcs/blob/master/text/0503-prelude-stabilization.md
6816 [where]: https://github.com/rust-lang/rfcs/blob/master/text/0135-where.md
6817 [refl]: https://github.com/rust-lang/rfcs/blob/master/text/0379-remove-reflection.md
6818 [panic]: https://github.com/rust-lang/rfcs/blob/master/text/0221-panic.md
6819 [structvars]: https://github.com/rust-lang/rfcs/blob/master/text/0418-struct-variants.md
6820 [hrtb]: https://github.com/rust-lang/rfcs/blob/master/text/0387-higher-ranked-trait-bounds.md
6821 [unicode]: https://github.com/rust-lang/rfcs/blob/master/text/0446-es6-unicode-escapes.md
6822 [oibit]: https://github.com/rust-lang/rfcs/blob/master/text/0019-opt-in-builtin-traits.md
6823 [macros]: https://github.com/rust-lang/rfcs/blob/master/text/0378-expr-macros.md
6824 [range]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md#indexing-and-slicing
6825 [arrays]: https://github.com/rust-lang/rfcs/blob/master/text/0520-new-array-repeat-syntax.md
6826 [show]: https://github.com/rust-lang/rfcs/blob/master/text/0504-show-stabilization.md
6827 [derive]: https://github.com/rust-lang/rfcs/blob/master/text/0534-deriving2derive.md
6828 [self]: https://github.com/rust-lang/rfcs/blob/master/text/0532-self-in-use.md
6829 [fb]: https://github.com/rust-lang/rfcs/blob/master/text/0212-restore-int-fallback.md
6830 [objsafe]: https://github.com/rust-lang/rfcs/blob/master/text/0255-object-safety.md
6831 [assoc]: https://github.com/rust-lang/rfcs/blob/master/text/0195-associated-items.md
6832 [ints]: https://github.com/rust-lang/rfcs/pull/544#issuecomment-68760871
6833 [trpl]: https://doc.rust-lang.org/book/index.html
6834 [rbe]: http://rustbyexample.com/
6837 Version 0.12.0 (2014-10-09)
6838 =============================
6840 * ~1900 changes, numerous bugfixes
6844 * The introductory documentation (now called The Rust Guide) has
6845 been completely rewritten, as have a number of supplementary
6847 * Rust's package manager, Cargo, continues to improve and is
6848 sometimes considered to be quite awesome.
6849 * Many API's in `std` have been reviewed and updated for
6850 consistency with the in-development Rust coding
6851 guidelines. The standard library documentation tracks
6852 stabilization progress.
6853 * Minor libraries have been moved out-of-tree to the rust-lang org
6854 on GitHub: uuid, semver, glob, num, hexfloat, fourcc. They can
6855 be installed with Cargo.
6856 * Lifetime elision allows lifetime annotations to be left off of
6857 function declarations in many common scenarios.
6858 * Rust now works on 64-bit Windows.
6861 * Indexing can be overloaded with the `Index` and `IndexMut`
6863 * The `if let` construct takes a branch only if the `let` pattern
6864 matches, currently behind the 'if_let' feature gate.
6865 * 'where clauses', a more flexible syntax for specifying trait
6866 bounds that is more aesthetic, have been added for traits and
6867 free functions. Where clauses will in the future make it
6868 possible to constrain associated types, which would be
6869 impossible with the existing syntax.
6870 * A new slicing syntax (e.g. `[0..4]`) has been introduced behind
6871 the 'slicing_syntax' feature gate, and can be overloaded with
6872 the `Slice` or `SliceMut` traits.
6873 * The syntax for matching of sub-slices has been changed to use a
6874 postfix `..` instead of prefix (.e.g. `[a, b, c..]`), for
6875 consistency with other uses of `..` and to future-proof
6876 potential additional uses of the syntax.
6877 * The syntax for matching inclusive ranges in patterns has changed
6878 from `0..3` to `0...4` to be consistent with the exclusive range
6880 * Matching of sub-slices in non-tail positions (e.g. `[a.., b,
6881 c]`) has been put behind the 'advanced_slice_patterns' feature
6882 gate and may be removed in the future.
6883 * Components of tuples and tuple structs can be extracted using
6884 the `value.0` syntax, currently behind the `tuple_indexing`
6886 * The `#[crate_id]` attribute is no longer supported; versioning
6887 is handled by the package manager.
6888 * Renaming crate imports are now written `extern crate foo as bar`
6889 instead of `extern crate bar = foo`.
6890 * Renaming use statements are now written `use foo as bar` instead
6892 * `let` and `match` bindings and argument names in macros are now
6894 * The new, more efficient, closure types ('unboxed closures') have
6895 been added under a feature gate, 'unboxed_closures'. These will
6896 soon replace the existing closure types, once higher-ranked
6897 trait lifetimes are added to the language.
6898 * `move` has been added as a keyword, for indicating closures
6899 that capture by value.
6900 * Mutation and assignment is no longer allowed in pattern guards.
6901 * Generic structs and enums can now have trait bounds.
6902 * The `Share` trait is now called `Sync` to free up the term
6903 'shared' to refer to 'shared reference' (the default reference
6905 * Dynamically-sized types have been mostly implemented,
6906 unifying the behavior of fat-pointer types with the rest of the
6908 * As part of dynamically-sized types, the `Sized` trait has been
6909 introduced, which qualifying types implement by default, and
6910 which type parameters expect by default. To specify that a type
6911 parameter does not need to be sized, write `<Sized? T>`. Most
6912 types are `Sized`, notable exceptions being unsized arrays
6913 (`[T]`) and trait types.
6914 * Closures can return `!`, as in `|| -> !` or `proc() -> !`.
6915 * Lifetime bounds can now be applied to type parameters and object
6917 * The old, reference counted GC type, `Gc<T>` which was once
6918 denoted by the `@` sigil, has finally been removed. GC will be
6919 revisited in the future.
6922 * Library documentation has been improved for a number of modules.
6923 * Bit-vectors, collections::bitv has been modernized.
6924 * The url crate is deprecated in favor of
6925 http://github.com/servo/rust-url, which can be installed with
6927 * Most I/O stream types can be cloned and subsequently closed from
6929 * A `std::time::Duration` type has been added for use in I/O
6930 methods that rely on timers, as well as in the 'time' crate's
6931 `Timespec` arithmetic.
6932 * The runtime I/O abstraction layer that enabled the green thread
6933 scheduler to do non-thread-blocking I/O has been removed, along
6934 with the libuv-based implementation employed by the green thread
6935 scheduler. This will greatly simplify the future I/O work.
6936 * `collections::btree` has been rewritten to have a more
6937 idiomatic and efficient design.
6940 * rustdoc output now indicates the stability levels of API's.
6941 * The `--crate-name` flag can specify the name of the crate
6942 being compiled, like `#[crate_name]`.
6943 * The `-C metadata` specifies additional metadata to hash into
6944 symbol names, and `-C extra-filename` specifies additional
6945 information to put into the output filename, for use by the
6946 package manager for versioning.
6947 * debug info generation has continued to improve and should be
6948 more reliable under both gdb and lldb.
6949 * rustc has experimental support for compiling in parallel
6950 using the `-C codegen-units` flag.
6951 * rustc no longer encodes rpath information into binaries by
6955 * Stack usage has been optimized with LLVM lifetime annotations.
6956 * Official Rust binaries on Linux are more compatible with older
6957 kernels and distributions, built on CentOS 5.10.
6960 Version 0.11.0 (2014-07-02)
6961 ==========================
6963 * ~1700 changes, numerous bugfixes
6966 * ~[T] has been removed from the language. This type is superseded by
6968 * ~str has been removed from the language. This type is superseded by
6970 * ~T has been removed from the language. This type is superseded by the
6972 * @T has been removed from the language. This type is superseded by the
6973 standard library's std::gc::Gc<T> type.
6974 * Struct fields are now all private by default.
6975 * Vector indices and shift amounts are both required to be a `uint`
6976 instead of any integral type.
6977 * Byte character, byte string, and raw byte string literals are now all
6978 supported by prefixing the normal literal with a `b`.
6979 * Multiple ABIs are no longer allowed in an ABI string
6980 * The syntax for lifetimes on closures/procedures has been tweaked
6981 slightly: `<'a>|A, B|: 'b + K -> T`
6982 * Floating point modulus has been removed from the language; however it
6983 is still provided by a library implementation.
6984 * Private enum variants are now disallowed.
6985 * The `priv` keyword has been removed from the language.
6986 * A closure can no longer be invoked through a &-pointer.
6987 * The `use foo, bar, baz;` syntax has been removed from the language.
6988 * The transmute intrinsic no longer works on type parameters.
6989 * Statics now allow blocks/items in their definition.
6990 * Trait bounds are separated from objects with + instead of : now.
6991 * Objects can no longer be read while they are mutably borrowed.
6992 * The address of a static is now marked as insignificant unless the
6993 #[inline(never)] attribute is placed it.
6994 * The #[unsafe_destructor] attribute is now behind a feature gate.
6995 * Struct literals are no longer allowed in ambiguous positions such as
6996 if, while, match, and for..in.
6997 * Declaration of lang items and intrinsics are now feature-gated by
6999 * Integral literals no longer default to `int`, and floating point
7000 literals no longer default to `f64`. Literals must be suffixed with an
7001 appropriate type if inference cannot determine the type of the
7003 * The Box<T> type is no longer implicitly borrowed to &mut T.
7004 * Procedures are now required to not capture borrowed references.
7007 * The standard library is now a "facade" over a number of underlying
7008 libraries. This means that development on the standard library should
7009 be speedier due to smaller crates, as well as a clearer line between
7011 * A new library, libcore, lives under the standard library's facade
7012 which is Rust's "0-assumption" library, suitable for embedded and
7013 kernel development for example.
7014 * A regex crate has been added to the standard distribution. This crate
7015 includes statically compiled regular expressions.
7016 * The unwrap/unwrap_err methods on Result require a Show bound for
7017 better error messages.
7018 * The return types of the std::comm primitives have been centralized
7019 around the Result type.
7020 * A number of I/O primitives have gained the ability to time out their
7022 * A number of I/O primitives have gained the ability to close their
7023 reading/writing halves to cancel pending operations.
7024 * Reverse iterator methods have been removed in favor of `rev()` on
7025 their forward-iteration counterparts.
7026 * A bitflags! macro has been added to enable easy interop with C and
7027 management of bit flags.
7028 * A debug_assert! macro is now provided which is disabled when
7029 `--cfg ndebug` is passed to the compiler.
7030 * A graphviz crate has been added for creating .dot files.
7031 * The std::cast module has been migrated into std::mem.
7032 * The std::local_data api has been migrated from freestanding functions
7033 to being based on methods.
7034 * The Pod trait has been renamed to Copy.
7035 * jemalloc has been added as the default allocator for types.
7036 * The API for allocating memory has been changed to use proper alignment
7037 and sized deallocation
7038 * Connecting a TcpStream or binding a TcpListener is now based on a
7039 string address and a u16 port. This allows connecting to a hostname as
7041 * The Reader trait now contains a core method, read_at_least(), which
7042 correctly handles many repeated 0-length reads.
7043 * The process-spawning API is now centered around a builder-style
7045 * The :? printing qualifier has been moved from the standard library to
7046 an external libdebug crate.
7047 * Eq/Ord have been renamed to PartialEq/PartialOrd. TotalEq/TotalOrd
7048 have been renamed to Eq/Ord.
7049 * The select/plural methods have been removed from format!. The escapes
7050 for { and } have also changed from \{ and \} to {{ and }},
7052 * The TaskBuilder API has been re-worked to be a true builder, and
7053 extension traits for spawning native/green tasks have been added.
7056 * All breaking changes to the language or libraries now have their
7057 commit message annotated with `[breaking-change]` to allow for easy
7058 discovery of breaking changes.
7059 * The compiler will now try to suggest how to annotate lifetimes if a
7060 lifetime-related error occurs.
7061 * Debug info continues to be improved greatly with general bug fixes and
7062 better support for situations like link time optimization (LTO).
7063 * Usage of syntax extensions when cross-compiling has been fixed.
7064 * Functionality equivalent to GCC & Clang's -ffunction-sections,
7065 -fdata-sections and --gc-sections has been enabled by default
7066 * The compiler is now stricter about where it will load module files
7067 from when a module is declared via `mod foo;`.
7068 * The #[phase(syntax)] attribute has been renamed to #[phase(plugin)].
7069 Syntax extensions are now discovered via a "plugin registrar" type
7070 which will be extended in the future to other various plugins.
7071 * Lints have been restructured to allow for dynamically loadable lints.
7072 * A number of rustdoc improvements:
7073 * The HTML output has been visually redesigned.
7074 * Markdown is now powered by hoedown instead of sundown.
7075 * Searching heuristics have been greatly improved.
7076 * The search index has been reduced in size by a great amount.
7077 * Cross-crate documentation via `pub use` has been greatly improved.
7078 * Primitive types are now hyperlinked and documented.
7079 * Documentation has been moved from static.rust-lang.org/doc to
7081 * A new sandbox, play.rust-lang.org, is available for running and
7082 sharing rust code examples on-line.
7083 * Unused attributes are now more robustly warned about.
7084 * The dead_code lint now warns about unused struct fields.
7085 * Cross-compiling to iOS is now supported.
7086 * Cross-compiling to mipsel is now supported.
7087 * Stability attributes are now inherited by default and no longer apply
7088 to intra-crate usage, only inter-crate usage.
7089 * Error message related to non-exhaustive match expressions have been
7093 Version 0.10 (2014-04-03)
7094 =========================
7096 * ~1500 changes, numerous bugfixes
7099 * A new RFC process is now in place for modifying the language.
7100 * Patterns with `@`-pointers have been removed from the language.
7101 * Patterns with unique vectors (`~[T]`) have been removed from the
7103 * Patterns with unique strings (`~str`) have been removed from the
7105 * `@str` has been removed from the language.
7106 * `@[T]` has been removed from the language.
7107 * `@self` has been removed from the language.
7108 * `@Trait` has been removed from the language.
7109 * Headers on `~` allocations which contain `@` boxes inside the type for
7110 reference counting have been removed.
7111 * The semantics around the lifetimes of temporary expressions have changed,
7112 see #3511 and #11585 for more information.
7113 * Cross-crate syntax extensions are now possible, but feature gated. See
7114 #11151 for more information. This includes both `macro_rules!` macros as
7115 well as syntax extensions such as `format!`.
7116 * New lint modes have been added, and older ones have been turned on to be
7118 * Unnecessary parentheses
7121 * Uppercase variables
7122 * Publicly visible private types
7123 * `#[deriving]` with raw pointers
7124 * Unsafe functions can no longer be coerced to closures.
7125 * Various obscure macros such as `log_syntax!` are now behind feature gates.
7126 * The `#[simd]` attribute is now behind a feature gate.
7127 * Visibility is no longer allowed on `extern crate` statements, and
7128 unnecessary visibility (`priv`) is no longer allowed on `use` statements.
7129 * Trailing commas are now allowed in argument lists and tuple patterns.
7130 * The `do` keyword has been removed, it is now a reserved keyword.
7131 * Default type parameters have been implemented, but are feature gated.
7132 * Borrowed variables through captures in closures are now considered soundly.
7133 * `extern mod` is now `extern crate`
7134 * The `Freeze` trait has been removed.
7135 * The `Share` trait has been added for types that can be shared among
7137 * Labels in macros are now hygienic.
7138 * Expression/statement macro invocations can be delimited with `{}` now.
7139 * Treatment of types allowed in `static mut` locations has been tweaked.
7140 * The `*` and `.` operators are now overloadable through the `Deref` and
7142 * `~Trait` and `proc` no longer have `Send` bounds by default.
7143 * Partial type hints are now supported with the `_` type marker.
7144 * An `Unsafe` type was introduced for interior mutability. It is now
7145 considered undefined to transmute from `&T` to `&mut T` without using the
7147 * The #[linkage] attribute was implemented for extern statics/functions.
7148 * The inner attribute syntax has changed from `#[foo];` to `#![foo]`.
7149 * `Pod` was renamed to `Copy`.
7152 * The `libextra` library has been removed. It has now been decomposed into
7153 component libraries with smaller and more focused nuggets of
7154 functionality. The full list of libraries can be found on the
7155 documentation index page.
7156 * std: `std::condition` has been removed. All I/O errors are now propagated
7157 through the `Result` type. In order to assist with error handling, a
7158 `try!` macro for unwrapping errors with an early return and a lint for
7159 unused results has been added. See #12039 for more information.
7160 * std: The `vec` module has been renamed to `slice`.
7161 * std: A new vector type, `Vec<T>`, has been added in preparation for DST.
7162 This will become the only growable vector in the future.
7163 * std: `std::io` now has more public re-exports. Types such as `BufferedReader`
7164 are now found at `std::io::BufferedReader` instead of
7165 `std::io::buffered::BufferedReader`.
7166 * std: `print` and `println` are no longer in the prelude, the `print!` and
7167 `println!` macros are intended to be used instead.
7168 * std: `Rc` now has a `Weak` pointer for breaking cycles, and it no longer
7169 attempts to statically prevent cycles.
7170 * std: The standard distribution is adopting the policy of pushing failure
7171 to the user rather than failing in libraries. Many functions (such as
7172 `slice::last()`) now return `Option<T>` instead of `T` + failing.
7173 * std: `fmt::Default` has been renamed to `fmt::Show`, and it now has a new
7174 deriving mode: `#[deriving(Show)]`.
7175 * std: `ToStr` is now implemented for all types implementing `Show`.
7176 * std: The formatting trait methods now take `&self` instead of `&T`
7177 * std: The `invert()` method on iterators has been renamed to `rev()`
7178 * std: `std::num` has seen a reduction in the genericity of its traits,
7179 consolidating functionality into a few core traits.
7180 * std: Backtraces are now printed on task failure if the environment
7181 variable `RUST_BACKTRACE` is present.
7182 * std: Naming conventions for iterators have been standardized. More details
7183 can be found on the wiki's style guide.
7184 * std: `eof()` has been removed from the `Reader` trait. Specific types may
7185 still implement the function.
7186 * std: Networking types are now cloneable to allow simultaneous reads/writes.
7187 * std: `assert_approx_eq!` has been removed
7188 * std: The `e` and `E` formatting specifiers for floats have been added to
7189 print them in exponential notation.
7190 * std: The `Times` trait has been removed
7191 * std: Indications of variance and opting out of builtin bounds is done
7192 through marker types in `std::kinds::marker` now
7193 * std: `hash` has been rewritten, `IterBytes` has been removed, and
7194 `#[deriving(Hash)]` is now possible.
7195 * std: `SharedChan` has been removed, `Sender` is now cloneable.
7196 * std: `Chan` and `Port` were renamed to `Sender` and `Receiver`.
7197 * std: `Chan::new` is now `channel()`.
7198 * std: A new synchronous channel type has been implemented.
7199 * std: A `select!` macro is now provided for selecting over `Receiver`s.
7200 * std: `hashmap` and `trie` have been moved to `libcollections`
7201 * std: `run` has been rolled into `io::process`
7202 * std: `assert_eq!` now uses `{}` instead of `{:?}`
7203 * std: The equality and comparison traits have seen some reorganization.
7204 * std: `rand` has moved to `librand`.
7205 * std: `to_{lower,upper}case` has been implemented for `char`.
7206 * std: Logging has been moved to `liblog`.
7207 * collections: `HashMap` has been rewritten for higher performance and less
7209 * native: The default runtime is now `libnative`. If `libgreen` is desired,
7210 it can be booted manually. The runtime guide has more information and
7212 * native: All I/O functionality except signals has been implemented.
7213 * green: Task spawning with `libgreen` has been optimized with stack caching
7214 and various trimming of code.
7215 * green: Tasks spawned by `libgreen` now have an unmapped guard page.
7216 * sync: The `extra::sync` module has been updated to modern rust (and moved
7217 to the `sync` library), tweaking and improving various interfaces while
7218 dropping redundant functionality.
7219 * sync: A new `Barrier` type has been added to the `sync` library.
7220 * sync: An efficient mutex for native and green tasks has been implemented.
7221 * serialize: The `base64` module has seen some improvement. It treats
7222 newlines better, has non-string error values, and has seen general
7224 * fourcc: A `fourcc!` macro was introduced
7225 * hexfloat: A `hexfloat!` macro was implemented for specifying floats via a
7226 hexadecimal literal.
7229 * `rustpkg` has been deprecated and removed from the main repository. Its
7230 replacement, `cargo`, is under development.
7231 * Nightly builds of rust are now available
7232 * The memory usage of rustc has been improved many times throughout this
7234 * The build process supports disabling rpath support for the rustc binary
7236 * Code generation has improved in some cases, giving more information to the
7237 LLVM optimization passes to enable more extensive optimizations.
7238 * Debuginfo compatibility with lldb on OSX has been restored.
7239 * The master branch is now gated on an android bot, making building for
7240 android much more reliable.
7241 * Output flags have been centralized into one `--emit` flag.
7242 * Crate type flags have been centralized into one `--crate-type` flag.
7243 * Codegen flags have been consolidated behind a `-C` flag.
7244 * Linking against outdated crates now has improved error messages.
7245 * Error messages with lifetimes will often suggest how to annotate the
7246 function to fix the error.
7247 * Many more types are documented in the standard library, and new guides
7249 * Many `rustdoc` improvements:
7250 * code blocks are syntax highlighted.
7251 * render standalone markdown files.
7252 * the --test flag tests all code blocks by default.
7253 * exported macros are displayed.
7254 * re-exported types have their documentation inlined at the location of the
7256 * search works across crates that have been rendered to the same output
7260 Version 0.9 (2014-01-09)
7261 ==========================
7263 * ~1800 changes, numerous bugfixes
7266 * The `float` type has been removed. Use `f32` or `f64` instead.
7267 * A new facility for enabling experimental features (feature gating) has
7268 been added, using the crate-level `#[feature(foo)]` attribute.
7269 * Managed boxes (@) are now behind a feature gate
7270 (`#[feature(managed_boxes)]`) in preparation for future removal. Use the
7271 standard library's `Gc` or `Rc` types instead.
7272 * `@mut` has been removed. Use `std::cell::{Cell, RefCell}` instead.
7273 * Jumping back to the top of a loop is now done with `continue` instead of
7275 * Strings can no longer be mutated through index assignment.
7276 * Raw strings can be created via the basic `r"foo"` syntax or with matched
7277 hash delimiters, as in `r###"foo"###`.
7278 * `~fn` is now written `proc (args) -> retval { ... }` and may only be
7280 * The `&fn` type is now written `|args| -> ret` to match the literal form.
7281 * `@fn`s have been removed.
7282 * `do` only works with procs in order to make it obvious what the cost
7284 * Single-element tuple-like structs can no longer be dereferenced to
7285 obtain the inner value. A more comprehensive solution for overloading
7286 the dereference operator will be provided in the future.
7287 * The `#[link(...)]` attribute has been replaced with
7288 `#[crate_id = "name#vers"]`.
7289 * Empty `impl`s must be terminated with empty braces and may not be
7290 terminated with a semicolon.
7291 * Keywords are no longer allowed as lifetime names; the `self` lifetime
7292 no longer has any special meaning.
7293 * The old `fmt!` string formatting macro has been removed.
7294 * `printf!` and `printfln!` (old-style formatting) removed in favor of
7295 `print!` and `println!`.
7296 * `mut` works in patterns now, as in `let (mut x, y) = (1, 2);`.
7297 * The `extern mod foo (name = "bar")` syntax has been removed. Use
7298 `extern mod foo = "bar"` instead.
7299 * New reserved keywords: `alignof`, `offsetof`, `sizeof`.
7300 * Macros can have attributes.
7301 * Macros can expand to items with attributes.
7302 * Macros can expand to multiple items.
7303 * The `asm!` macro is feature-gated (`#[feature(asm)]`).
7304 * Comments may be nested.
7305 * Values automatically coerce to trait objects they implement, without
7307 * Enum discriminants are no longer an entire word but as small as needed to
7308 contain all the variants. The `repr` attribute can be used to override
7309 the discriminant size, as in `#[repr(int)]` for integer-sized, and
7310 `#[repr(C)]` to match C enums.
7311 * Non-string literals are not allowed in attributes (they never worked).
7312 * The FFI now supports variadic functions.
7313 * Octal numeric literals, as in `0o7777`.
7314 * The `concat!` syntax extension performs compile-time string concatenation.
7315 * The `#[fixed_stack_segment]` and `#[rust_stack]` attributes have been
7316 removed as Rust no longer uses segmented stacks.
7317 * Non-ascii identifiers are feature-gated (`#[feature(non_ascii_idents)]`).
7318 * Ignoring all fields of an enum variant or tuple-struct is done with `..`,
7319 not `*`; ignoring remaining fields of a struct is also done with `..`,
7320 not `_`; ignoring a slice of a vector is done with `..`, not `.._`.
7321 * `rustc` supports the "win64" calling convention via `extern "win64"`.
7322 * `rustc` supports the "system" calling convention, which defaults to the
7323 preferred convention for the target platform, "stdcall" on 32-bit Windows,
7325 * The `type_overflow` lint (default: warn) checks literals for overflow.
7326 * The `unsafe_block` lint (default: allow) checks for usage of `unsafe`.
7327 * The `attribute_usage` lint (default: warn) warns about unknown
7329 * The `unknown_features` lint (default: warn) warns about unknown
7331 * The `dead_code` lint (default: warn) checks for dead code.
7332 * Rust libraries can be linked statically to one another
7333 * `#[link_args]` is behind the `link_args` feature gate.
7334 * Native libraries are now linked with `#[link(name = "foo")]`
7335 * Native libraries can be statically linked to a rust crate
7336 (`#[link(name = "foo", kind = "static")]`).
7337 * Native OS X frameworks are now officially supported
7338 (`#[link(name = "foo", kind = "framework")]`).
7339 * The `#[thread_local]` attribute creates thread-local (not task-local)
7340 variables. Currently behind the `thread_local` feature gate.
7341 * The `return` keyword may be used in closures.
7342 * Types that can be copied via a memcpy implement the `Pod` kind.
7343 * The `cfg` attribute can now be used on struct fields and enum variants.
7346 * std: The `option` and `result` API's have been overhauled to make them
7347 simpler, more consistent, and more composable.
7348 * std: The entire `std::io` module has been replaced with one that is
7349 more comprehensive and that properly interfaces with the underlying
7350 scheduler. File, TCP, UDP, Unix sockets, pipes, and timers are all
7352 * std: `io::util` contains a number of useful implementations of
7353 `Reader` and `Writer`, including `NullReader`, `NullWriter`,
7354 `ZeroReader`, `TeeReader`.
7355 * std: The reference counted pointer type `extra::rc` moved into std.
7356 * std: The `Gc` type in the `gc` module will replace `@` (it is currently
7357 just a wrapper around it).
7358 * std: The `Either` type has been removed.
7359 * std: `fmt::Default` can be implemented for any type to provide default
7360 formatting to the `format!` macro, as in `format!("{}", myfoo)`.
7361 * std: The `rand` API continues to be tweaked.
7362 * std: The `rust_begin_unwind` function, useful for inserting breakpoints
7363 on failure in gdb, is now named `rust_fail`.
7364 * std: The `each_key` and `each_value` methods on `HashMap` have been
7365 replaced by the `keys` and `values` iterators.
7366 * std: Functions dealing with type size and alignment have moved from the
7367 `sys` module to the `mem` module.
7368 * std: The `path` module was written and API changed.
7369 * std: `str::from_utf8` has been changed to cast instead of allocate.
7370 * std: `starts_with` and `ends_with` methods added to vectors via the
7371 `ImmutableEqVector` trait, which is in the prelude.
7372 * std: Vectors can be indexed with the `get_opt` method, which returns `None`
7373 if the index is out of bounds.
7374 * std: Task failure no longer propagates between tasks, as the model was
7375 complex, expensive, and incompatible with thread-based tasks.
7376 * std: The `Any` type can be used for dynamic typing.
7377 * std: `~Any` can be passed to the `fail!` macro and retrieved via
7379 * std: Methods that produce iterators generally do not have an `_iter`
7381 * std: `cell::Cell` and `cell::RefCell` can be used to introduce mutability
7382 roots (mutable fields, etc.). Use instead of e.g. `@mut`.
7383 * std: `util::ignore` renamed to `prelude::drop`.
7384 * std: Slices have `sort` and `sort_by` methods via the `MutableVector`
7386 * std: `vec::raw` has seen a lot of cleanup and API changes.
7387 * std: The standard library no longer includes any C++ code, and very
7388 minimal C, eliminating the dependency on libstdc++.
7389 * std: Runtime scheduling and I/O functionality has been factored out into
7390 extensible interfaces and is now implemented by two different crates:
7391 libnative, for native threading and I/O; and libgreen, for green threading
7392 and I/O. This paves the way for using the standard library in more limited
7393 embedded environments.
7394 * std: The `comm` module has been rewritten to be much faster, have a
7395 simpler, more consistent API, and to work for both native and green
7397 * std: All libuv dependencies have been moved into the rustuv crate.
7398 * native: New implementations of runtime scheduling on top of OS threads.
7399 * native: New native implementations of TCP, UDP, file I/O, process spawning,
7401 * green: The green thread scheduler and message passing types are almost
7403 * extra: The `flatpipes` module had bitrotted and was removed.
7404 * extra: All crypto functions have been removed and Rust now has a policy of
7405 not reimplementing crypto in the standard library. In the future crypto
7406 will be provided by external crates with bindings to established libraries.
7407 * extra: `c_vec` has been modernized.
7408 * extra: The `sort` module has been removed. Use the `sort` method on
7412 * The `rust` and `rusti` commands have been removed, due to lack of
7414 * `rustdoc` was completely rewritten.
7415 * `rustdoc` can test code examples in documentation.
7416 * `rustpkg` can test packages with the argument, 'test'.
7417 * `rustpkg` supports arbitrary dependencies, including C libraries.
7418 * `rustc`'s support for generating debug info is improved again.
7419 * `rustc` has better error reporting for unbalanced delimiters.
7420 * `rustc`'s JIT support was removed due to bitrot.
7421 * Executables and static libraries can be built with LTO (-Z lto)
7422 * `rustc` adds a `--dep-info` flag for communicating dependencies to
7426 Version 0.8 (2013-09-26)
7427 ============================
7429 * ~2200 changes, numerous bugfixes
7432 * The `for` loop syntax has changed to work with the `Iterator` trait.
7433 * At long last, unwinding works on Windows.
7434 * Default methods are ready for use.
7435 * Many trait inheritance bugs fixed.
7436 * Owned and borrowed trait objects work more reliably.
7437 * `copy` is no longer a keyword. It has been replaced by the `Clone` trait.
7438 * rustc can omit emission of code for the `debug!` macro if it is passed
7440 * mod.rs is now "blessed". When loading `mod foo;`, rustc will now look
7441 for foo.rs, then foo/mod.rs, and will generate an error when both are
7443 * Strings no longer contain trailing nulls. The new `std::c_str` module
7444 provides new mechanisms for converting to C strings.
7445 * The type of foreign functions is now `extern "C" fn` instead of `*u8'.
7446 * The FFI has been overhauled such that foreign functions are called directly,
7447 instead of through a stack-switching wrapper.
7448 * Calling a foreign function must be done through a Rust function with the
7449 `#[fixed_stack_segment]` attribute.
7450 * The `externfn!` macro can be used to declare both a foreign function and
7451 a `#[fixed_stack_segment]` wrapper at once.
7452 * `pub` and `priv` modifiers on `extern` blocks are no longer parsed.
7453 * `unsafe` is no longer allowed on extern fns - they are all unsafe.
7454 * `priv` is disallowed everywhere except for struct fields and enum variants.
7455 * `&T` (besides `&'static T`) is no longer allowed in `@T`.
7456 * `ref` bindings in irrefutable patterns work correctly now.
7457 * `char` is now prevented from containing invalid code points.
7458 * Casting to `bool` is no longer allowed.
7459 * `\0` is now accepted as an escape in chars and strings.
7460 * `yield` is a reserved keyword.
7461 * `typeof` is a reserved keyword.
7462 * Crates may be imported by URL with `extern mod foo = "url";`.
7463 * Explicit enum discriminants may be given as uints as in `enum E { V = 0u }`
7464 * Static vectors can be initialized with repeating elements,
7465 e.g. `static foo: [u8, .. 100]: [0, .. 100];`.
7466 * Static structs can be initialized with functional record update,
7467 e.g. `static foo: Foo = Foo { a: 5, .. bar };`.
7468 * `cfg!` can be used to conditionally execute code based on the crate
7469 configuration, similarly to `#[cfg(...)]`.
7470 * The `unnecessary_qualification` lint detects unneeded module
7471 prefixes (default: allow).
7472 * Arithmetic operations have been implemented on the SIMD types in
7473 `std::unstable::simd`.
7474 * Exchange allocation headers were removed, reducing memory usage.
7475 * `format!` implements a completely new, extensible, and higher-performance
7476 string formatting system. It will replace `fmt!`.
7477 * `print!` and `println!` write formatted strings (using the `format!`
7478 extension) to stdout.
7479 * `write!` and `writeln!` write formatted strings (using the `format!`
7480 extension) to the new Writers in `std::rt::io`.
7481 * The library section in which a function or static is placed may
7482 be specified with `#[link_section = "..."]`.
7483 * The `proto!` syntax extension for defining bounded message protocols
7485 * `macro_rules!` is hygienic for `let` declarations.
7486 * The `#[export_name]` attribute specifies the name of a symbol.
7487 * `unreachable!` can be used to indicate unreachable code, and fails
7491 * std: Transitioned to the new runtime, written in Rust.
7492 * std: Added an experimental I/O library, `rt::io`, based on the new
7494 * std: A new generic `range` function was added to the prelude, replacing
7495 `uint::range` and friends.
7496 * std: `range_rev` no longer exists. Since range is an iterator it can be
7497 reversed with `range(lo, hi).invert()`.
7498 * std: The `chain` method on option renamed to `and_then`; `unwrap_or_default`
7499 renamed to `unwrap_or`.
7500 * std: The `iterator` module was renamed to `iter`.
7501 * std: Integral types now support the `checked_add`, `checked_sub`, and
7502 `checked_mul` operations for detecting overflow.
7503 * std: Many methods in `str`, `vec`, `option, `result` were renamed for
7505 * std: Methods are standardizing on conventions for casting methods:
7506 `to_foo` for copying, `into_foo` for moving, `as_foo` for temporary
7508 * std: The `CString` type in `c_str` provides new ways to convert to and
7510 * std: `DoubleEndedIterator` can yield elements in two directions.
7511 * std: The `mut_split` method on vectors partitions an `&mut [T]` into
7513 * std: `str::from_bytes` renamed to `str::from_utf8`.
7514 * std: `pop_opt` and `shift_opt` methods added to vectors.
7515 * std: The task-local data interface no longer uses @, and keys are
7516 no longer function pointers.
7517 * std: The `swap_unwrap` method of `Option` renamed to `take_unwrap`.
7518 * std: Added `SharedPort` to `comm`.
7519 * std: `Eq` has a default method for `ne`; only `eq` is required
7521 * std: `Ord` has default methods for `le`, `gt` and `ge`; only `lt`
7522 is required in implementations.
7523 * std: `is_utf8` performance is improved, impacting many string functions.
7524 * std: `os::MemoryMap` provides cross-platform mmap.
7525 * std: `ptr::offset` is now unsafe, but also more optimized. Offsets that
7526 are not 'in-bounds' are considered undefined.
7527 * std: Many freestanding functions in `vec` removed in favor of methods.
7528 * std: Many freestanding functions on scalar types removed in favor of
7530 * std: Many options to task builders were removed since they don't make
7531 sense in the new scheduler design.
7532 * std: More containers implement `FromIterator` so can be created by the
7534 * std: More complete atomic types in `unstable::atomics`.
7535 * std: `comm::PortSet` removed.
7536 * std: Mutating methods in the `Set` and `Map` traits have been moved into
7537 the `MutableSet` and `MutableMap` traits. `Container::is_empty`,
7538 `Map::contains_key`, `MutableMap::insert`, and `MutableMap::remove` have
7539 default implementations.
7540 * std: Various `from_str` functions were removed in favor of a generic
7541 `from_str` which is available in the prelude.
7542 * std: `util::unreachable` removed in favor of the `unreachable!` macro.
7543 * extra: `dlist`, the doubly-linked list was modernized.
7544 * extra: Added a `hex` module with `ToHex` and `FromHex` traits.
7545 * extra: Added `glob` module, replacing `std::os::glob`.
7546 * extra: `rope` was removed.
7547 * extra: `deque` was renamed to `ringbuf`. `RingBuf` implements `Deque`.
7548 * extra: `net`, and `timer` were removed. The experimental replacements
7549 are `std::rt::io::net` and `std::rt::io::timer`.
7550 * extra: Iterators implemented for `SmallIntMap`.
7551 * extra: Iterators implemented for `Bitv` and `BitvSet`.
7552 * extra: `SmallIntSet` removed. Use `BitvSet`.
7553 * extra: Performance of JSON parsing greatly improved.
7554 * extra: `semver` updated to SemVer 2.0.0.
7555 * extra: `term` handles more terminals correctly.
7556 * extra: `dbg` module removed.
7557 * extra: `par` module removed.
7558 * extra: `future` was cleaned up, with some method renames.
7559 * extra: Most free functions in `getopts` were converted to methods.
7562 * rustc's debug info generation (`-Z debug-info`) is greatly improved.
7563 * rustc accepts `--target-cpu` to compile to a specific CPU architecture,
7564 similarly to gcc's `--march` flag.
7565 * rustc's performance compiling small crates is much better.
7566 * rustpkg has received many improvements.
7567 * rustpkg supports git tags as package IDs.
7568 * rustpkg builds into target-specific directories so it can be used for
7570 * The number of concurrent test tasks is controlled by the environment
7571 variable RUST_TEST_TASKS.
7572 * The test harness can now report metrics for benchmarks.
7573 * All tools have man pages.
7574 * Programs compiled with `--test` now support the `-h` and `--help` flags.
7575 * The runtime uses jemalloc for allocations.
7576 * Segmented stacks are temporarily disabled as part of the transition to
7577 the new runtime. Stack overflows are possible!
7578 * A new documentation backend, rustdoc_ng, is available for use. It is
7579 still invoked through the normal `rustdoc` command.
7582 Version 0.7 (2013-07-03)
7583 =======================
7585 * ~2000 changes, numerous bugfixes
7588 * `impl`s no longer accept a visibility qualifier. Put them on methods
7590 * The borrow checker has been rewritten with flow-sensitivity, fixing
7591 many bugs and inconveniences.
7592 * The `self` parameter no longer implicitly means `&'self self`,
7593 and can be explicitly marked with a lifetime.
7594 * Overloadable compound operators (`+=`, etc.) have been temporarily
7595 removed due to bugs.
7596 * The `for` loop protocol now requires `for`-iterators to return `bool`
7597 so they compose better.
7598 * The `Durable` trait is replaced with the `'static` bounds.
7599 * Trait default methods work more often.
7600 * Structs with the `#[packed]` attribute have byte alignment and
7601 no padding between fields.
7602 * Type parameters bound by `Copy` must now be copied explicitly with
7604 * It is now illegal to move out of a dereferenced unsafe pointer.
7605 * `Option<~T>` is now represented as a nullable pointer.
7606 * `@mut` does dynamic borrow checks correctly.
7607 * The `main` function is only detected at the topmost level of the crate.
7608 The `#[main]` attribute is still valid anywhere.
7609 * Struct fields may no longer be mutable. Use inherited mutability.
7610 * The `#[no_send]` attribute makes a type that would otherwise be
7612 * The `#[no_freeze]` attribute makes a type that would otherwise be
7614 * Unbounded recursion will abort the process after reaching the limit
7615 specified by the `RUST_MAX_STACK` environment variable (default: 1GB).
7616 * The `vecs_implicitly_copyable` lint mode has been removed. Vectors
7617 are never implicitly copyable.
7618 * `#[static_assert]` makes compile-time assertions about static bools.
7619 * At long last, 'argument modes' no longer exist.
7620 * The rarely used `use mod` statement no longer exists.
7623 * `fail!` and `assert!` accept `~str`, `&'static str` or `fmt!`-style
7625 * `Encodable`, `Decodable`, `Ord`, `TotalOrd`, `TotalEq`, `DeepClone`,
7626 `Rand`, `Zero` and `ToStr` can all be automatically derived with
7628 * The `bytes!` macro returns a vector of bytes for string, u8, char,
7629 and unsuffixed integer literals.
7632 * The `core` crate was renamed to `std`.
7633 * The `std` crate was renamed to `extra`.
7634 * More and improved documentation.
7635 * std: `iterator` module for external iterator objects.
7636 * Many old-style (internal, higher-order function) iterators replaced by
7637 implementations of `Iterator`.
7638 * std: Many old internal vector and string iterators,
7639 incl. `any`, `all`. removed.
7640 * std: The `finalize` method of `Drop` renamed to `drop`.
7641 * std: The `drop` method now takes `&mut self` instead of `&self`.
7642 * std: The prelude no longer re-exports any modules, only types and traits.
7643 * std: Prelude additions: `print`, `println`, `FromStr`, `ApproxEq`, `Equiv`,
7644 `Iterator`, `IteratorUtil`, many numeric traits, many tuple traits.
7645 * std: New numeric traits: `Fractional`, `Real`, `RealExt`, `Integer`, `Ratio`,
7646 `Algebraic`, `Trigonometric`, `Exponential`, `Primitive`.
7647 * std: Tuple traits and accessors defined for up to 12-tuples, e.g.
7648 `(0, 1, 2).n2()` or `(0, 1, 2).n2_ref()`.
7649 * std: Many types implement `Clone`.
7650 * std: `path` type renamed to `Path`.
7651 * std: `mut` module and `Mut` type removed.
7652 * std: Many standalone functions removed in favor of methods and iterators
7653 in `vec`, `str`. In the future methods will also work as functions.
7654 * std: `reinterpret_cast` removed. Use `transmute`.
7655 * std: ascii string handling in `std::ascii`.
7656 * std: `Rand` is implemented for ~/@.
7657 * std: `run` module for spawning processes overhauled.
7658 * std: Various atomic types added to `unstable::atomic`.
7659 * std: Various types implement `Zero`.
7660 * std: `LinearMap` and `LinearSet` renamed to `HashMap` and `HashSet`.
7661 * std: Borrowed pointer functions moved from `ptr` to `borrow`.
7662 * std: Added `os::mkdir_recursive`.
7663 * std: Added `os::glob` function performs filesystems globs.
7664 * std: `FuzzyEq` renamed to `ApproxEq`.
7665 * std: `Map` now defines `pop` and `swap` methods.
7666 * std: `Cell` constructors converted to static methods.
7667 * extra: `rc` module adds the reference counted pointers, `Rc` and `RcMut`.
7668 * extra: `flate` module moved from `std` to `extra`.
7669 * extra: `fileinput` module for iterating over a series of files.
7670 * extra: `Complex` number type and `complex` module.
7671 * extra: `Rational` number type and `rational` module.
7672 * extra: `BigInt`, `BigUint` implement numeric and comparison traits.
7673 * extra: `term` uses terminfo now, is more correct.
7674 * extra: `arc` functions converted to methods.
7675 * extra: Implementation of fixed output size variations of SHA-2.
7678 * `unused_variable` lint mode for unused variables (default: warn).
7679 * `unused_unsafe` lint mode for detecting unnecessary `unsafe` blocks
7681 * `unused_mut` lint mode for identifying unused `mut` qualifiers
7683 * `dead_assignment` lint mode for unread variables (default: warn).
7684 * `unnecessary_allocation` lint mode detects some heap allocations that are
7685 immediately borrowed so could be written without allocating (default: warn).
7686 * `missing_doc` lint mode (default: allow).
7687 * `unreachable_code` lint mode (default: warn).
7688 * The `rusti` command has been rewritten and a number of bugs addressed.
7689 * rustc outputs in color on more terminals.
7690 * rustc accepts a `--link-args` flag to pass arguments to the linker.
7691 * rustc accepts a `-Z print-link-args` flag for debugging linkage.
7692 * Compiling with `-g` will make the binary record information about
7693 dynamic borrowcheck failures for debugging.
7694 * rustdoc has a nicer stylesheet.
7695 * Various improvements to rustdoc.
7696 * Improvements to rustpkg (see the detailed release notes).
7699 Version 0.6 (2013-04-03)
7700 ========================
7702 * ~2100 changes, numerous bugfixes
7705 * The self type parameter in traits is now spelled `Self`
7706 * The `self` parameter in trait and impl methods must now be explicitly
7707 named (for example: `fn f(&self) { }`). Implicit self is deprecated.
7708 * Static methods no longer require the `static` keyword and instead
7709 are distinguished by the lack of a `self` parameter
7710 * Replaced the `Durable` trait with the `'static` lifetime
7711 * The old closure type syntax with the trailing sigil has been
7712 removed in favor of the more consistent leading sigil
7713 * `super` is a keyword, and may be prefixed to paths
7714 * Trait bounds are separated with `+` instead of whitespace
7715 * Traits are implemented with `impl Trait for Type`
7716 instead of `impl Type: Trait`
7717 * Lifetime syntax is now `&'l foo` instead of `&l/foo`
7718 * The `export` keyword has finally been removed
7719 * The `move` keyword has been removed (see "Semantic changes")
7720 * The interior mutability qualifier on vectors, `[mut T]`, has been
7721 removed. Use `&mut [T]`, etc.
7722 * `mut` is no longer valid in `~mut T`. Use inherited mutability
7723 * `fail` is no longer a keyword. Use `fail!()`
7724 * `assert` is no longer a keyword. Use `assert!()`
7725 * `log` is no longer a keyword. use `debug!`, etc.
7726 * 1-tuples may be represented as `(T,)`
7727 * Struct fields may no longer be `mut`. Use inherited mutability,
7728 `@mut T`, `core::mut` or `core::cell`
7729 * `extern mod { ... }` is no longer valid syntax for foreign
7730 function modules. Use extern blocks: `extern { ... }`
7731 * Newtype enums removed. Use tuple-structs.
7732 * Trait implementations no longer support visibility modifiers
7733 * Pattern matching over vectors improved and expanded
7734 * `const` renamed to `static` to correspond to lifetime name,
7735 and make room for future `static mut` unsafe mutable globals.
7736 * Replaced `#[deriving_eq]` with `#[deriving(Eq)]`, etc.
7737 * `Clone` implementations can be automatically generated with
7738 `#[deriving(Clone)]`
7739 * Casts to traits must use a pointer sigil, e.g. `@foo as @Bar`
7740 instead of `foo as Bar`.
7741 * Fixed length vector types are now written as `[int, .. 3]`
7742 instead of `[int * 3]`.
7743 * Fixed length vector types can express the length as a constant
7744 expression. (ex: `[int, .. GL_BUFFER_SIZE - 2]`)
7747 * Types with owned pointers or custom destructors move by default,
7748 eliminating the `move` keyword
7749 * All foreign functions are considered unsafe
7750 * &mut is now unaliasable
7751 * Writes to borrowed @mut pointers are prevented dynamically
7753 * The name of the main function can be customized using #[main]
7754 * The default type of an inferred closure is &fn instead of @fn
7755 * `use` statements may no longer be "chained" - they cannot import
7756 identifiers imported by previous `use` statements
7757 * `use` statements are crate relative, importing from the "top"
7758 of the crate by default. Paths may be prefixed with `super::`
7759 or `self::` to change the search behavior.
7760 * Method visibility is inherited from the implementation declaration
7761 * Structural records have been removed
7762 * Many more types can be used in static items, including enums
7763 'static-lifetime pointers and vectors
7764 * Pattern matching over vectors improved and expanded
7765 * Typechecking of closure types has been overhauled to
7766 improve inference and eliminate unsoundness
7767 * Macros leave scope at the end of modules, unless that module is
7768 tagged with #[macro_escape]
7771 * Added big integers to `std::bigint`
7772 * Removed `core::oldcomm` module
7773 * Added pipe-based `core::comm` module
7774 * Numeric traits have been reorganized under `core::num`
7775 * `vec::slice` finally returns a slice
7776 * `debug!` and friends don't require a format string, e.g. `debug!(Foo)`
7777 * Containers reorganized around traits in `core::container`
7778 * `core::dvec` removed, `~[T]` is a drop-in replacement
7779 * `core::send_map` renamed to `core::hashmap`
7780 * `std::map` removed; replaced with `core::hashmap`
7781 * `std::treemap` reimplemented as an owned balanced tree
7782 * `std::deque` and `std::smallintmap` reimplemented as owned containers
7783 * `core::trie` added as a fast ordered map for integer keys
7784 * Set types added to `core::hashmap`, `core::trie` and `std::treemap`
7785 * `Ord` split into `Ord` and `TotalOrd`. `Ord` is still used to
7786 overload the comparison operators, whereas `TotalOrd` is used
7787 by certain container types
7790 * Replaced the 'cargo' package manager with 'rustpkg'
7791 * Added all-purpose 'rust' tool
7792 * `rustc --test` now supports benchmarks with the `#[bench]` attribute
7793 * rustc now *attempts* to offer spelling suggestions
7794 * Improved support for ARM and Android
7795 * Preliminary MIPS backend
7796 * Improved foreign function ABI implementation for x86, x86_64
7797 * Various memory usage improvements
7798 * Rust code may be embedded in foreign code under limited circumstances
7799 * Inline assembler supported by new asm!() syntax extension.
7802 Version 0.5 (2012-12-21)
7803 ===========================
7805 * ~900 changes, numerous bugfixes
7808 * Removed `<-` move operator
7809 * Completed the transition from the `#fmt` extension syntax to `fmt!`
7810 * Removed old fixed length vector syntax - `[T]/N`
7811 * New token-based quasi-quoters, `quote_tokens!`, `quote_expr!`, etc.
7812 * Macros may now expand to items and statements
7813 * `a.b()` is always parsed as a method call, never as a field projection
7814 * `Eq` and `IterBytes` implementations can be automatically generated
7815 with `#[deriving_eq]` and `#[deriving_iter_bytes]` respectively
7816 * Removed the special crate language for `.rc` files
7817 * Function arguments may consist of any irrefutable pattern
7820 * `&` and `~` pointers may point to objects
7821 * Tuple structs - `struct Foo(Bar, Baz)`. Will replace newtype enums.
7822 * Enum variants may be structs
7823 * Destructors can be added to all nominal types with the Drop trait
7824 * Structs and nullary enum variants may be constants
7825 * Values that cannot be implicitly copied are now automatically moved
7826 without writing `move` explicitly
7827 * `&T` may now be coerced to `*T`
7828 * Coercions happen in `let` statements as well as function calls
7829 * `use` statements now take crate-relative paths
7830 * The module and type namespaces have been merged so that static
7831 method names can be resolved under the trait in which they are
7834 * Improved support for language features
7835 * Trait inheritance works in many scenarios
7836 * More support for explicit self arguments in methods - `self`, `&self`
7837 `@self`, and `~self` all generally work as expected
7838 * Static methods work in more situations
7839 * Experimental: Traits may declare default methods for the implementations
7843 * New condition handling system in `core::condition`
7844 * Timsort added to `std::sort`
7845 * New priority queue, `std::priority_queue`
7846 * Pipes for serializable types, `std::flatpipes'
7847 * Serialization overhauled to be trait-based
7848 * Expanded `getopts` definitions
7849 * Moved futures to `std`
7850 * More functions are pure now
7851 * `core::comm` renamed to `oldcomm`. Still deprecated
7852 * `rustdoc` and `cargo` are libraries now
7855 * Added a preliminary REPL, `rusti`
7856 * License changed from MIT to dual MIT/APL2
7859 Version 0.4 (2012-10-15)
7860 ==========================
7862 * ~2000 changes, numerous bugfixes
7865 * All keywords are now strict and may not be used as identifiers anywhere
7866 * Keyword removal: 'again', 'import', 'check', 'new', 'owned', 'send',
7867 'of', 'with', 'to', 'class'.
7868 * Classes are replaced with simpler structs
7869 * Explicit method self types
7870 * `ret` became `return` and `alt` became `match`
7871 * `import` is now `use`; `use is now `extern mod`
7872 * `extern mod { ... }` is now `extern { ... }`
7873 * `use mod` is the recommended way to import modules
7874 * `pub` and `priv` replace deprecated export lists
7875 * The syntax of `match` pattern arms now uses fat arrow (=>)
7876 * `main` no longer accepts an args vector; use `os::args` instead
7879 * Trait implementations are now coherent, ala Haskell typeclasses
7880 * Trait methods may be static
7881 * Argument modes are deprecated
7882 * Borrowed pointers are much more mature and recommended for use
7883 * Strings and vectors in the static region are stored in constant memory
7884 * Typestate was removed
7885 * Resolution rewritten to be more reliable
7886 * Support for 'dual-mode' data structures (freezing and thawing)
7889 * Most binary operators can now be overloaded via the traits in
7891 * `std::net::url` for representing URLs
7892 * Sendable hash maps in `core::send_map`
7893 * `core::task' gained a (currently unsafe) task-local storage API
7896 * An efficient new intertask communication primitive called the pipe,
7897 along with a number of higher-level channel types, in `core::pipes`
7898 * `std::arc`, an atomically reference counted, immutable, shared memory
7900 * `std::sync`, various exotic synchronization tools based on arcs and pipes
7901 * Futures are now based on pipes and sendable
7902 * More robust linked task failure
7903 * Improved task builder API
7906 * Improved error reporting
7907 * Preliminary JIT support
7908 * Preliminary work on precise GC
7909 * Extensive architectural improvements to rustc
7910 * Begun a transition away from buggy C++-based reflection (shape) code to
7911 Rust-based (visitor) code
7912 * All hash functions and tables converted to secure, randomized SipHash
7915 Version 0.3 (2012-07-12)
7916 ========================
7918 * ~1900 changes, numerous bugfixes
7920 * New coding conveniences
7921 * Integer-literal suffix inference
7922 * Per-item control over warnings, errors
7923 * #[cfg(windows)] and #[cfg(unix)] attributes
7924 * Documentation comments
7925 * More compact closure syntax
7926 * 'do' expressions for treating higher-order functions as
7928 * *-patterns (wildcard extended to all constructor fields)
7931 * Name resolution pass and exhaustiveness checker rewritten
7932 * Region pointers and borrow checking supersede alias
7934 * Init-ness checking is now provided by a region-based liveness
7935 pass instead of the typestate pass; same for last-use analysis
7936 * Extensive work on region pointers
7938 * Experimental new language features
7939 * Slices and fixed-size, interior-allocated vectors
7940 * #!-comments for lang versioning, shell execution
7941 * Destructors and iface implementation for classes;
7942 type-parameterized classes and class methods
7943 * 'const' type kind for types that can be used to implement
7944 shared-memory concurrency patterns
7948 * Removal of various obsolete features
7949 * Keywords: 'be', 'prove', 'syntax', 'note', 'mutable', 'bind',
7950 'crust', 'native' (now 'extern'), 'cont' (now 'again')
7952 * Constructs: do-while loops ('do' repurposed), fn binding,
7953 resources (replaced by destructors)
7955 * Compiler reorganization
7956 * Syntax-layer of compiler split into separate crate
7957 * Clang (from LLVM project) integrated into build
7958 * Typechecker split into sub-modules
7961 * New time functions
7962 * Extension methods for many built-in types
7963 * Arc: atomic-refcount read-only / exclusive-use shared cells
7964 * Par: parallel map and search routines
7965 * Extensive work on libuv interface
7966 * Much vector code moved to libraries
7967 * Syntax extensions: #line, #col, #file, #mod, #stringify,
7968 #include, #include_str, #include_bin
7971 * Cargo automatically resolves dependencies
7974 Version 0.2 (2012-03-29)
7975 =========================
7977 * >1500 changes, numerous bugfixes
7979 * New docs and doc tooling
7981 * New port: FreeBSD x86_64
7983 * Compilation model enhancements
7984 * Generics now specialized, multiply instantiated
7985 * Functions now inlined across separate crates
7987 * Scheduling, stack and threading fixes
7988 * Noticeably improved message-passing performance
7989 * Explicit schedulers
7993 * Experimental new language features
7994 * Operator overloading
7998 * Various language extensions
7999 * C-callback function types: 'crust fn ...'
8000 * Infinite-loop construct: 'loop { ... }'
8001 * Shorten 'mutable' to 'mut'
8002 * Required mutable-local qualifier: 'let mut ...'
8003 * Basic glob-exporting: 'export foo::*;'
8004 * Alt now exhaustive, 'alt check' for runtime-checked
8005 * Block-function form of 'for' loop, with 'break' and 'ret'.
8008 * AST quasi-quote syntax extension
8009 * Revived libuv interface
8010 * New modules: core::{future, iter}, std::arena
8011 * Merged per-platform std::{os*, fs*} to core::{libc, os}
8012 * Extensive cleanup, regularization in libstd, libcore
8015 Version 0.1 (2012-01-20)
8016 ===============================
8018 * Most language features work, including:
8019 * Unique pointers, unique closures, move semantics
8020 * Interface-constrained generics
8021 * Static interface dispatch
8023 * Multithread task scheduling
8024 * Typestate predicates
8025 * Failure unwinding, destructors
8026 * Pattern matching and destructuring assignment
8027 * Lightweight block-lambda syntax
8028 * Preliminary macro-by-example
8030 * Compiler works with the following configurations:
8031 * Linux: x86 and x86_64 hosts and targets
8032 * macOS: x86 and x86_64 hosts and targets
8033 * Windows: x86 hosts and targets
8035 * Cross compilation / multi-target configuration supported.
8037 * Preliminary API-documentation and package-management tools included.
8041 * Documentation is incomplete.
8043 * Performance is below intended target.
8045 * Standard library APIs are subject to extensive change, reorganization.
8047 * Language-level versioning is not yet operational - future code will