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]
73 - The [`x86_64-unknown-uefi` platform can not be built][62785] with rustc
75 - The [`armv7-unknown-linux-gnueabihf` platform is known to have
76 issues][62896] with certain crates such as libc.
78 [60260]: https://github.com/rust-lang/rust/pull/60260/
79 [61457]: https://github.com/rust-lang/rust/pull/61457/
80 [61491]: https://github.com/rust-lang/rust/pull/61491/
81 [61884]: https://github.com/rust-lang/rust/pull/61884/
82 [61953]: https://github.com/rust-lang/rust/pull/61953/
83 [62042]: https://github.com/rust-lang/rust/pull/62042/
84 [62528]: https://github.com/rust-lang/rust/pull/62528/
85 [62583]: https://github.com/rust-lang/rust/pull/62583/
86 [62735]: https://github.com/rust-lang/rust/pull/62735/
87 [62766]: https://github.com/rust-lang/rust/pull/62766/
88 [62784]: https://github.com/rust-lang/rust/pull/62784/
89 [62785]: https://github.com/rust-lang/rust/issues/62785/
90 [62814]: https://github.com/rust-lang/rust/pull/62814/
91 [62896]: https://github.com/rust-lang/rust/issues/62896/
92 [63000]: https://github.com/rust-lang/rust/pull/63000/
93 [63056]: https://github.com/rust-lang/rust/pull/63056/
94 [63107]: https://github.com/rust-lang/rust/pull/63107/
95 [63346]: https://github.com/rust-lang/rust/pull/63346/
96 [63421]: https://github.com/rust-lang/rust/pull/63421/
97 [cargo/7084]: https://github.com/rust-lang/cargo/pull/7084/
98 [cargo/7143]: https://github.com/rust-lang/cargo/pull/7143/
99 [`<*const T>::cast`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.cast
100 [`<*mut T>::cast`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.cast
101 [`Duration::as_secs_f32`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.as_secs_f32
102 [`Duration::as_secs_f64`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.as_secs_f64
103 [`Duration::div_duration_f32`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.div_duration_f32
104 [`Duration::div_duration_f64`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.div_duration_f64
105 [`Duration::div_f32`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.div_f32
106 [`Duration::div_f64`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.div_f64
107 [`Duration::from_secs_f32`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.from_secs_f32
108 [`Duration::from_secs_f64`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.from_secs_f64
109 [`Duration::mul_f32`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.mul_f32
110 [`Duration::mul_f64`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.mul_f64
111 [`any::type_name`]: https://doc.rust-lang.org/std/any/fn.type_name.html
112 [forge-platform-support]: https://forge.rust-lang.org/platform-support.html
113 [pipeline-internals]: https://internals.rust-lang.org/t/evaluating-pipelined-rustc-compilation/10199
115 Version 1.37.0 (2019-08-15)
116 ==========================
120 - `#[must_use]` will now warn if the type is contained in a [tuple][61100],
121 [`Box`][62228], or an [array][62235] and unused.
122 - [You can now use the `cfg` and `cfg_attr` attributes on
123 generic parameters.][61547]
124 - [You can now use enum variants through type alias.][61682] e.g. You can
127 type MyOption = Option<u8>;
129 fn increment_or_zero(x: MyOption) -> u8 {
131 MyOption::Some(y) => y + 1,
136 - [You can now use `_` as an identifier for consts.][61347] e.g. You can write
138 - [You can now use `#[repr(align(X)]` on enums.][61229]
139 - [The `?` Kleene macro operator is now available in the
140 2015 edition.][60932]
144 - [You can now enable Profile-Guided Optimization with the `-C profile-generate`
145 and `-C profile-use` flags.][61268] For more information on how to use profile
146 guided optimization, please refer to the [rustc book][rustc-book-pgo].
147 - [The `rust-lldb` wrapper script should now work again.][61827]
151 - [`mem::MaybeUninit<T>` is now ABI-compatible with `T`.][61802]
155 - [`BufReader::buffer`]
156 - [`BufWriter::buffer`]
158 - [`Cell<[T]>::as_slice_of_cells`][`Cell<slice>::as_slice_of_cells`]
159 - [`DoubleEndedIterator::nth_back`]
161 - [`Wrapping::reverse_bits`]
162 - [`i128::reverse_bits`]
163 - [`i16::reverse_bits`]
164 - [`i32::reverse_bits`]
165 - [`i64::reverse_bits`]
166 - [`i8::reverse_bits`]
167 - [`isize::reverse_bits`]
168 - [`slice::copy_within`]
169 - [`u128::reverse_bits`]
170 - [`u16::reverse_bits`]
171 - [`u32::reverse_bits`]
172 - [`u64::reverse_bits`]
173 - [`u8::reverse_bits`]
174 - [`usize::reverse_bits`]
178 - [`Cargo.lock` files are now included by default when publishing executable crates
179 with executables.][cargo/7026]
180 - [You can now specify `default-run="foo"` in `[package]` to specify the
181 default executable to use for `cargo run`.][cargo/7056]
188 - [Using `...` for inclusive range patterns will now warn by default.][61342]
189 Please transition your code to using the `..=` syntax for inclusive
191 - [Using a trait object without the `dyn` will now warn by default.][61203]
192 Please transition your code to use `dyn Trait` for trait objects instead.
194 [62228]: https://github.com/rust-lang/rust/pull/62228/
195 [62235]: https://github.com/rust-lang/rust/pull/62235/
196 [61802]: https://github.com/rust-lang/rust/pull/61802/
197 [61827]: https://github.com/rust-lang/rust/pull/61827/
198 [61547]: https://github.com/rust-lang/rust/pull/61547/
199 [61682]: https://github.com/rust-lang/rust/pull/61682/
200 [61268]: https://github.com/rust-lang/rust/pull/61268/
201 [61342]: https://github.com/rust-lang/rust/pull/61342/
202 [61347]: https://github.com/rust-lang/rust/pull/61347/
203 [61100]: https://github.com/rust-lang/rust/pull/61100/
204 [61203]: https://github.com/rust-lang/rust/pull/61203/
205 [61229]: https://github.com/rust-lang/rust/pull/61229/
206 [60932]: https://github.com/rust-lang/rust/pull/60932/
207 [cargo/7026]: https://github.com/rust-lang/cargo/pull/7026/
208 [cargo/7056]: https://github.com/rust-lang/cargo/pull/7056/
209 [`BufReader::buffer`]: https://doc.rust-lang.org/std/io/struct.BufReader.html#method.buffer
210 [`BufWriter::buffer`]: https://doc.rust-lang.org/std/io/struct.BufWriter.html#method.buffer
211 [`Cell::from_mut`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.from_mut
212 [`Cell<slice>::as_slice_of_cells`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.as_slice_of_cells
213 [`DoubleEndedIterator::nth_back`]: https://doc.rust-lang.org/std/iter/trait.DoubleEndedIterator.html#method.nth_back
214 [`Option::xor`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.xor
215 [`RefCell::try_borrow_unguarded`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow_unguarded
216 [`Wrapping::reverse_bits`]: https://doc.rust-lang.org/std/num/struct.Wrapping.html#method.reverse_bits
217 [`i128::reverse_bits`]: https://doc.rust-lang.org/std/primitive.i128.html#method.reverse_bits
218 [`i16::reverse_bits`]: https://doc.rust-lang.org/std/primitive.i16.html#method.reverse_bits
219 [`i32::reverse_bits`]: https://doc.rust-lang.org/std/primitive.i32.html#method.reverse_bits
220 [`i64::reverse_bits`]: https://doc.rust-lang.org/std/primitive.i64.html#method.reverse_bits
221 [`i8::reverse_bits`]: https://doc.rust-lang.org/std/primitive.i8.html#method.reverse_bits
222 [`isize::reverse_bits`]: https://doc.rust-lang.org/std/primitive.isize.html#method.reverse_bits
223 [`slice::copy_within`]: https://doc.rust-lang.org/std/primitive.slice.html#method.copy_within
224 [`u128::reverse_bits`]: https://doc.rust-lang.org/std/primitive.u128.html#method.reverse_bits
225 [`u16::reverse_bits`]: https://doc.rust-lang.org/std/primitive.u16.html#method.reverse_bits
226 [`u32::reverse_bits`]: https://doc.rust-lang.org/std/primitive.u32.html#method.reverse_bits
227 [`u64::reverse_bits`]: https://doc.rust-lang.org/std/primitive.u64.html#method.reverse_bits
228 [`u8::reverse_bits`]: https://doc.rust-lang.org/std/primitive.u8.html#method.reverse_bits
229 [`usize::reverse_bits`]: https://doc.rust-lang.org/std/primitive.usize.html#method.reverse_bits
230 [rustc-book-pgo]: https://doc.rust-lang.org/rustc/profile-guided-optimization.html
233 Version 1.36.0 (2019-07-04)
234 ==========================
238 - [Non-Lexical Lifetimes are now enabled on the 2015 edition.][59114]
239 - [The order of traits in trait objects no longer affects the semantics of that
240 object.][59445] e.g. `dyn Send + fmt::Debug` is now equivalent to
241 `dyn fmt::Debug + Send`, where this was previously not the case.
245 - [`HashMap`'s implementation has been replaced with `hashbrown::HashMap` implementation.][58623]
246 - [`TryFromSliceError` now implements `From<Infallible>`.][60318]
247 - [`mem::needs_drop` is now available as a const fn.][60364]
248 - [`alloc::Layout::from_size_align_unchecked` is now available as a const fn.][60370]
249 - [`String` now implements `BorrowMut<str>`.][60404]
250 - [`io::Cursor` now implements `Default`.][60234]
251 - [Both `NonNull::{dangling, cast}` are now const fns.][60244]
252 - [The `alloc` crate is now stable.][59675] `alloc` allows you to use a subset
253 of `std` (e.g. `Vec`, `Box`, `Arc`) in `#![no_std]` environments if the
254 environment has access to heap memory allocation.
255 - [`String` now implements `From<&String>`.][59825]
256 - [You can now pass multiple arguments to the `dbg!` macro.][59826] `dbg!` will
257 return a tuple of each argument when there is multiple arguments.
258 - [`Result::{is_err, is_ok}` are now `#[must_use]` and will produce a warning if
263 - [`VecDeque::rotate_left`]
264 - [`VecDeque::rotate_right`]
265 - [`Iterator::copied`]
268 - [`Read::read_vectored`]
269 - [`Write::write_vectored`]
270 - [`str::as_mut_ptr`]
271 - [`mem::MaybeUninit`]
272 - [`pointer::align_offset`]
276 - [`task::RawWakerVTable`]
282 - [Cargo will now produce an error if you attempt to use the name of a required dependency as a feature.][cargo/6860]
283 - [You can now pass the `--offline` flag to run cargo without accessing the network.][cargo/6934]
285 You can find further change's in [Cargo's 1.36.0 release notes][cargo-1-36-0].
289 There have been numerous additions and fixes to clippy, see [Clippy's 1.36.0 release notes][clippy-1-36-0] for more details.
296 - With the stabilisation of `mem::MaybeUninit`, `mem::uninitialized` use is no
297 longer recommended, and will be deprecated in 1.39.0.
299 [60318]: https://github.com/rust-lang/rust/pull/60318/
300 [60364]: https://github.com/rust-lang/rust/pull/60364/
301 [60370]: https://github.com/rust-lang/rust/pull/60370/
302 [60404]: https://github.com/rust-lang/rust/pull/60404/
303 [60234]: https://github.com/rust-lang/rust/pull/60234/
304 [60244]: https://github.com/rust-lang/rust/pull/60244/
305 [58623]: https://github.com/rust-lang/rust/pull/58623/
306 [59648]: https://github.com/rust-lang/rust/pull/59648/
307 [59675]: https://github.com/rust-lang/rust/pull/59675/
308 [59825]: https://github.com/rust-lang/rust/pull/59825/
309 [59826]: https://github.com/rust-lang/rust/pull/59826/
310 [59445]: https://github.com/rust-lang/rust/pull/59445/
311 [59114]: https://github.com/rust-lang/rust/pull/59114/
312 [cargo/6860]: https://github.com/rust-lang/cargo/pull/6860/
313 [cargo/6934]: https://github.com/rust-lang/cargo/pull/6934/
314 [`VecDeque::rotate_left`]: https://doc.rust-lang.org/std/collections/struct.VecDeque.html#method.rotate_left
315 [`VecDeque::rotate_right`]: https://doc.rust-lang.org/std/collections/struct.VecDeque.html#method.rotate_right
316 [`Iterator::copied`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#tymethod.copied
317 [`io::IoSlice`]: https://doc.rust-lang.org/std/io/struct.IoSlice.html
318 [`io::IoSliceMut`]: https://doc.rust-lang.org/std/io/struct.IoSliceMut.html
319 [`Read::read_vectored`]: https://doc.rust-lang.org/std/io/trait.Read.html#method.read_vectored
320 [`Write::write_vectored`]: https://doc.rust-lang.org/std/io/trait.Write.html#method.write_vectored
321 [`str::as_mut_ptr`]: https://doc.rust-lang.org/std/primitive.str.html#method.as_mut_ptr
322 [`mem::MaybeUninit`]: https://doc.rust-lang.org/std/mem/union.MaybeUninit.html
323 [`pointer::align_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.align_offset
324 [`future::Future`]: https://doc.rust-lang.org/std/future/trait.Future.html
325 [`task::Context`]: https://doc.rust-lang.org/beta/std/task/struct.Context.html
326 [`task::RawWaker`]: https://doc.rust-lang.org/beta/std/task/struct.RawWaker.html
327 [`task::RawWakerVTable`]: https://doc.rust-lang.org/beta/std/task/struct.RawWakerVTable.html
328 [`task::Waker`]: https://doc.rust-lang.org/beta/std/task/struct.Waker.html
329 [`task::Poll`]: https://doc.rust-lang.org/beta/std/task/enum.Poll.html
330 [clippy-1-36-0]: https://github.com/rust-lang/rust-clippy/blob/master/CHANGELOG.md#rust-136
331 [cargo-1-36-0]: https://github.com/rust-lang/cargo/blob/master/CHANGELOG.md#cargo-136-2019-07-04
334 Version 1.35.0 (2019-05-23)
335 ==========================
339 - [`FnOnce`, `FnMut`, and the `Fn` traits are now implemented for `Box<FnOnce>`,
340 `Box<FnMut>`, and `Box<Fn>` respectively.][59500]
341 - [You can now coerce closures into unsafe function pointers.][59580] e.g.
343 unsafe fn call_unsafe(func: unsafe fn()) {
348 unsafe { call_unsafe(|| {}); }
355 - [Added the `armv6-unknown-freebsd-gnueabihf` and
356 `armv7-unknown-freebsd-gnueabihf` targets.][58080]
357 - [Added the `wasm32-unknown-wasi` target.][59464]
362 - [`Thread` will now show its ID in `Debug` output.][59460]
363 - [`StdinLock`, `StdoutLock`, and `StderrLock` now implement `AsRawFd`.][59512]
364 - [`alloc::System` now implements `Default`.][59451]
365 - [Expanded `Debug` output (`{:#?}`) for structs now has a trailing comma on the
367 - [`char::{ToLowercase, ToUppercase}` now
368 implement `ExactSizeIterator`.][58778]
369 - [All `NonZero` numeric types now implement `FromStr`.][58717]
370 - [Removed the `Read` trait bounds
371 on the `BufReader::{get_ref, get_mut, into_inner}` methods.][58423]
372 - [You can now call the `dbg!` macro without any parameters to print the file
373 and line where it is called.][57847]
374 - [In place ASCII case conversions are now up to 4× faster.][59283]
375 e.g. `str::make_ascii_lowercase`
376 - [`hash_map::{OccupiedEntry, VacantEntry}` now implement `Sync`
383 - [`RefCell::replace_with`]
384 - [`RefCell::map_split`]
386 - [`Range::contains`]
387 - [`RangeFrom::contains`]
388 - [`RangeTo::contains`]
389 - [`RangeInclusive::contains`]
390 - [`RangeToInclusive::contains`]
395 - [You can now set `cargo:rustc-cdylib-link-arg` at build time to pass custom
396 linker arguments when building a `cdylib`.][cargo/6298] Its usage is highly
401 - [The Rust toolchain is now available natively for musl based distros.][58575]
403 [59460]: https://github.com/rust-lang/rust/pull/59460/
404 [59464]: https://github.com/rust-lang/rust/pull/59464/
405 [59500]: https://github.com/rust-lang/rust/pull/59500/
406 [59512]: https://github.com/rust-lang/rust/pull/59512/
407 [59580]: https://github.com/rust-lang/rust/pull/59580/
408 [59283]: https://github.com/rust-lang/rust/pull/59283/
409 [59451]: https://github.com/rust-lang/rust/pull/59451/
410 [59076]: https://github.com/rust-lang/rust/pull/59076/
411 [58778]: https://github.com/rust-lang/rust/pull/58778/
412 [58717]: https://github.com/rust-lang/rust/pull/58717/
413 [58369]: https://github.com/rust-lang/rust/pull/58369/
414 [58423]: https://github.com/rust-lang/rust/pull/58423/
415 [58080]: https://github.com/rust-lang/rust/pull/58080/
416 [57847]: https://github.com/rust-lang/rust/pull/57847/
417 [58575]: https://github.com/rust-lang/rust/pull/58575
418 [cargo/6298]: https://github.com/rust-lang/cargo/pull/6298/
419 [`f32::copysign`]: https://doc.rust-lang.org/stable/std/primitive.f32.html#method.copysign
420 [`f64::copysign`]: https://doc.rust-lang.org/stable/std/primitive.f64.html#method.copysign
421 [`RefCell::replace_with`]: https://doc.rust-lang.org/stable/std/cell/struct.RefCell.html#method.replace_with
422 [`RefCell::map_split`]: https://doc.rust-lang.org/stable/std/cell/struct.RefCell.html#method.map_split
423 [`ptr::hash`]: https://doc.rust-lang.org/stable/std/ptr/fn.hash.html
424 [`Range::contains`]: https://doc.rust-lang.org/std/ops/struct.Range.html#method.contains
425 [`RangeFrom::contains`]: https://doc.rust-lang.org/std/ops/struct.RangeFrom.html#method.contains
426 [`RangeTo::contains`]: https://doc.rust-lang.org/std/ops/struct.RangeTo.html#method.contains
427 [`RangeInclusive::contains`]: https://doc.rust-lang.org/std/ops/struct.RangeInclusive.html#method.contains
428 [`RangeToInclusive::contains`]: https://doc.rust-lang.org/std/ops/struct.RangeToInclusive.html#method.contains
429 [`Option::copied`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.copied
431 Version 1.34.2 (2019-05-14)
432 ===========================
434 * [Destabilize the `Error::type_id` function due to a security
435 vulnerability][60785] ([CVE-2019-12083])
437 [60785]: https://github.com/rust-lang/rust/pull/60785
438 [CVE-2019-12083]: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-12083
440 Version 1.34.1 (2019-04-25)
441 ===========================
443 * [Fix false positives for the `redundant_closure` Clippy lint][clippy/3821]
444 * [Fix false positives for the `missing_const_for_fn` Clippy lint][clippy/3844]
445 * [Fix Clippy panic when checking some macros][clippy/3805]
447 [clippy/3821]: https://github.com/rust-lang/rust-clippy/pull/3821
448 [clippy/3844]: https://github.com/rust-lang/rust-clippy/pull/3844
449 [clippy/3805]: https://github.com/rust-lang/rust-clippy/pull/3805
451 Version 1.34.0 (2019-04-11)
452 ==========================
456 - [You can now use `#[deprecated = "reason"]`][58166] as a shorthand for
457 `#[deprecated(note = "reason")]`. This was previously allowed by mistake
459 - [You can now accept token streams in `#[attr()]`,`#[attr[]]`, and
460 `#[attr{}]` procedural macros.][57367]
461 - [You can now write `extern crate self as foo;`][57407] to import your
462 crate's root into the extern prelude.
467 - [You can now target `riscv64imac-unknown-none-elf` and
468 `riscv64gc-unknown-none-elf`.][58406]
469 - [You can now enable linker plugin LTO optimisations with
470 `-C linker-plugin-lto`.][58057] This allows rustc to compile your Rust code
471 into LLVM bitcode allowing LLVM to perform LTO optimisations across C/C++ FFI
473 - [You can now target `powerpc64-unknown-freebsd`.][57809]
478 - [The trait bounds have been removed on some of `HashMap<K, V, S>`'s and
479 `HashSet<T, S>`'s basic methods.][58370] Most notably you no longer require
480 the `Hash` trait to create an iterator.
481 - [The `Ord` trait bounds have been removed on some of `BinaryHeap<T>`'s basic
482 methods.][58421] Most notably you no longer require the `Ord` trait to create
484 - [The methods `overflowing_neg` and `wrapping_neg` are now `const` functions
485 for all numeric types.][58044]
486 - [Indexing a `str` is now generic over all types that
487 implement `SliceIndex<str>`.][57604]
488 - [`str::trim`, `str::trim_matches`, `str::trim_{start, end}`, and
489 `str::trim_{start, end}_matches` are now `#[must_use]`][57106] and will
490 produce a warning if their returning type is unused.
491 - [The methods `checked_pow`, `saturating_pow`, `wrapping_pow`, and
492 `overflowing_pow` are now available for all numeric types.][57873] These are
493 equivalent to methods such as `wrapping_add` for the `pow` operation.
502 * [`atomic::AtomicI16`]
503 * [`atomic::AtomicI32`]
504 * [`atomic::AtomicI64`]
505 * [`atomic::AtomicI8`]
506 * [`atomic::AtomicU16`]
507 * [`atomic::AtomicU32`]
508 * [`atomic::AtomicU64`]
509 * [`atomic::AtomicU8`]
510 * [`convert::Infallible`]
511 * [`convert::TryFrom`]
512 * [`convert::TryInto`]
514 * [`iter::successors`]
515 * [`num::NonZeroI128`]
516 * [`num::NonZeroI16`]
517 * [`num::NonZeroI32`]
518 * [`num::NonZeroI64`]
520 * [`num::NonZeroIsize`]
521 * [`slice::sort_by_cached_key`]
522 * [`str::escape_debug`]
523 * [`str::escape_default`]
524 * [`str::escape_unicode`]
525 * [`str::split_ascii_whitespace`]
528 * [`Instant::checked_add`]
529 * [`Instant::checked_sub`]
530 * [`SystemTime::checked_add`]
531 * [`SystemTime::checked_sub`]
535 - [You can now use alternative registries to crates.io.][cargo/6654]
539 - [You can now use the `?` operator in your documentation tests without manually
540 adding `fn main() -> Result<(), _> {}`.][56470]
544 - [`Command::before_exec` is being replaced by the unsafe method
545 `Command::pre_exec`][58059] and will be deprecated with Rust 1.37.0.
546 - [Use of `ATOMIC_{BOOL, ISIZE, USIZE}_INIT` is now deprecated][57425] as you
547 can now use `const` functions in `static` variables.
549 [58370]: https://github.com/rust-lang/rust/pull/58370/
550 [58406]: https://github.com/rust-lang/rust/pull/58406/
551 [58421]: https://github.com/rust-lang/rust/pull/58421/
552 [58166]: https://github.com/rust-lang/rust/pull/58166/
553 [58044]: https://github.com/rust-lang/rust/pull/58044/
554 [58057]: https://github.com/rust-lang/rust/pull/58057/
555 [58059]: https://github.com/rust-lang/rust/pull/58059/
556 [57809]: https://github.com/rust-lang/rust/pull/57809/
557 [57873]: https://github.com/rust-lang/rust/pull/57873/
558 [57604]: https://github.com/rust-lang/rust/pull/57604/
559 [57367]: https://github.com/rust-lang/rust/pull/57367/
560 [57407]: https://github.com/rust-lang/rust/pull/57407/
561 [57425]: https://github.com/rust-lang/rust/pull/57425/
562 [57106]: https://github.com/rust-lang/rust/pull/57106/
563 [56470]: https://github.com/rust-lang/rust/pull/56470/
564 [cargo/6654]: https://github.com/rust-lang/cargo/pull/6654/
565 [`Any::type_id`]: https://doc.rust-lang.org/std/any/trait.Any.html#tymethod.type_id
566 [`Error::type_id`]: https://doc.rust-lang.org/std/error/trait.Error.html#method.type_id
567 [`atomic::AtomicI16`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicI16.html
568 [`atomic::AtomicI32`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicI32.html
569 [`atomic::AtomicI64`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicI64.html
570 [`atomic::AtomicI8`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicI8.html
571 [`atomic::AtomicU16`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU16.html
572 [`atomic::AtomicU32`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU32.html
573 [`atomic::AtomicU64`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU64.html
574 [`atomic::AtomicU8`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html
575 [`convert::Infallible`]: https://doc.rust-lang.org/std/convert/enum.Infallible.html
576 [`convert::TryFrom`]: https://doc.rust-lang.org/std/convert/trait.TryFrom.html
577 [`convert::TryInto`]: https://doc.rust-lang.org/std/convert/trait.TryInto.html
578 [`iter::from_fn`]: https://doc.rust-lang.org/std/iter/fn.from_fn.html
579 [`iter::successors`]: https://doc.rust-lang.org/std/iter/fn.successors.html
580 [`num::NonZeroI128`]: https://doc.rust-lang.org/std/num/struct.NonZeroI128.html
581 [`num::NonZeroI16`]: https://doc.rust-lang.org/std/num/struct.NonZeroI16.html
582 [`num::NonZeroI32`]: https://doc.rust-lang.org/std/num/struct.NonZeroI32.html
583 [`num::NonZeroI64`]: https://doc.rust-lang.org/std/num/struct.NonZeroI64.html
584 [`num::NonZeroI8`]: https://doc.rust-lang.org/std/num/struct.NonZeroI8.html
585 [`num::NonZeroIsize`]: https://doc.rust-lang.org/std/num/struct.NonZeroIsize.html
586 [`slice::sort_by_cached_key`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_by_cached_key
587 [`str::escape_debug`]: https://doc.rust-lang.org/std/primitive.str.html#method.escape_debug
588 [`str::escape_default`]: https://doc.rust-lang.org/std/primitive.str.html#method.escape_default
589 [`str::escape_unicode`]: https://doc.rust-lang.org/std/primitive.str.html#method.escape_unicode
590 [`str::split_ascii_whitespace`]: https://doc.rust-lang.org/std/primitive.str.html#method.split_ascii_whitespace
591 [`Instant::checked_add`]: https://doc.rust-lang.org/std/time/struct.Instant.html#method.checked_add
592 [`Instant::checked_sub`]: https://doc.rust-lang.org/std/time/struct.Instant.html#method.checked_sub
593 [`SystemTime::checked_add`]: https://doc.rust-lang.org/std/time/struct.SystemTime.html#method.checked_add
594 [`SystemTime::checked_sub`]: https://doc.rust-lang.org/std/time/struct.SystemTime.html#method.checked_sub
597 Version 1.33.0 (2019-02-28)
598 ==========================
602 - [You can now use the `cfg(target_vendor)` attribute.][57465] E.g.
603 `#[cfg(target_vendor="apple")] fn main() { println!("Hello Apple!"); }`
604 - [Integer patterns such as in a match expression can now be exhaustive.][56362]
605 E.g. You can have match statement on a `u8` that covers `0..=255` and
606 you would no longer be required to have a `_ => unreachable!()` case.
607 - [You can now have multiple patterns in `if let` and `while let`
608 expressions.][57532] You can do this with the same syntax as a `match`
618 let state = Creature::Crab("Ferris");
620 if let Creature::Crab(name) | Creature::Person(name) = state {
621 println!("This creature's name is: {}", name);
625 - [You can now have irrefutable `if let` and `while let` patterns.][57535] Using
626 this feature will by default produce a warning as this behaviour can be
627 unintuitive. E.g. `if let _ = 5 {}`
628 - [You can now use `let` bindings, assignments, expression statements,
629 and irrefutable pattern destructuring in const functions.][57175]
630 - [You can now call unsafe const functions.][57067] E.g.
632 const unsafe fn foo() -> i32 { 5 }
633 const fn bar() -> i32 {
637 - [You can now specify multiple attributes in a `cfg_attr` attribute.][57332]
638 E.g. `#[cfg_attr(all(), must_use, optimize)]`
639 - [You can now specify a specific alignment with the `#[repr(packed)]`
640 attribute.][57049] E.g. `#[repr(packed(2))] struct Foo(i16, i32);` is a struct
641 with an alignment of 2 bytes and a size of 6 bytes.
642 - [You can now import an item from a module as an `_`.][56303] This allows you to
643 import a trait's impls, and not have the name in the namespace. E.g.
645 use std::io::Read as _;
647 // Allowed as there is only one `Read` in the module.
650 - [You may now use `Rc`, `Arc`, and `Pin` as method receivers][56805].
654 - [You can now set a linker flavor for `rustc` with the `-Clinker-flavor`
655 command line argument.][56351]
656 - [The minimum required LLVM version has been bumped to 6.0.][56642]
657 - [Added support for the PowerPC64 architecture on FreeBSD.][57615]
658 - [The `x86_64-fortanix-unknown-sgx` target support has been upgraded to
659 tier 2 support.][57130] Visit the [platform support][platform-support] page for
660 information on Rust's platform support.
661 - [Added support for the `thumbv7neon-linux-androideabi` and
662 `thumbv7neon-unknown-linux-gnueabihf` targets.][56947]
663 - [Added support for the `x86_64-unknown-uefi` target.][56769]
667 - [The methods `overflowing_{add, sub, mul, shl, shr}` are now `const`
668 functions for all numeric types.][57566]
669 - [The methods `rotate_left`, `rotate_right`, and `wrapping_{add, sub, mul, shl, shr}`
670 are now `const` functions for all numeric types.][57105]
671 - [The methods `is_positive` and `is_negative` are now `const` functions for
672 all signed numeric types.][57105]
673 - [The `get` method for all `NonZero` types is now `const`.][57167]
674 - [The methods `count_ones`, `count_zeros`, `leading_zeros`, `trailing_zeros`,
675 `swap_bytes`, `from_be`, `from_le`, `to_be`, `to_le` are now `const` for all
676 numeric types.][57234]
677 - [`Ipv4Addr::new` is now a `const` function][57234]
681 - [`unix::FileExt::read_exact_at`]
682 - [`unix::FileExt::write_all_at`]
683 - [`Option::transpose`]
684 - [`Result::transpose`]
685 - [`convert::identity`]
688 - [`marker::PhantomPinned`]
689 - [`Vec::resize_with`]
690 - [`VecDeque::resize_with`]
691 - [`Duration::as_millis`]
692 - [`Duration::as_micros`]
693 - [`Duration::as_nanos`]
698 - [You can now publish crates that require a feature flag to compile with
699 `cargo publish --features` or `cargo publish --all-features`.][cargo/6453]
700 - [Cargo should now rebuild a crate if a file was modified during the initial
705 - The methods `str::{trim_left, trim_right, trim_left_matches, trim_right_matches}`
706 are now deprecated in the standard library, and their usage will now produce a warning.
707 Please use the `str::{trim_start, trim_end, trim_start_matches, trim_end_matches}`
709 - The `Error::cause` method has been deprecated in favor of `Error::source` which supports
711 - [Libtest no longer creates a new thread for each test when
712 `--test-threads=1`. It also runs the tests in deterministic order][56243]
714 [55982]: https://github.com/rust-lang/rust/pull/55982/
715 [56243]: https://github.com/rust-lang/rust/pull/56243
716 [56303]: https://github.com/rust-lang/rust/pull/56303/
717 [56351]: https://github.com/rust-lang/rust/pull/56351/
718 [56362]: https://github.com/rust-lang/rust/pull/56362
719 [56642]: https://github.com/rust-lang/rust/pull/56642/
720 [56769]: https://github.com/rust-lang/rust/pull/56769/
721 [56805]: https://github.com/rust-lang/rust/pull/56805
722 [56947]: https://github.com/rust-lang/rust/pull/56947/
723 [57049]: https://github.com/rust-lang/rust/pull/57049/
724 [57067]: https://github.com/rust-lang/rust/pull/57067/
725 [57105]: https://github.com/rust-lang/rust/pull/57105
726 [57130]: https://github.com/rust-lang/rust/pull/57130/
727 [57167]: https://github.com/rust-lang/rust/pull/57167/
728 [57175]: https://github.com/rust-lang/rust/pull/57175/
729 [57234]: https://github.com/rust-lang/rust/pull/57234/
730 [57332]: https://github.com/rust-lang/rust/pull/57332/
731 [57465]: https://github.com/rust-lang/rust/pull/57465/
732 [57532]: https://github.com/rust-lang/rust/pull/57532/
733 [57535]: https://github.com/rust-lang/rust/pull/57535/
734 [57566]: https://github.com/rust-lang/rust/pull/57566/
735 [57615]: https://github.com/rust-lang/rust/pull/57615/
736 [cargo/6453]: https://github.com/rust-lang/cargo/pull/6453/
737 [cargo/6484]: https://github.com/rust-lang/cargo/pull/6484/
738 [`unix::FileExt::read_exact_at`]: https://doc.rust-lang.org/std/os/unix/fs/trait.FileExt.html#method.read_exact_at
739 [`unix::FileExt::write_all_at`]: https://doc.rust-lang.org/std/os/unix/fs/trait.FileExt.html#method.write_all_at
740 [`Option::transpose`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.transpose
741 [`Result::transpose`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.transpose
742 [`convert::identity`]: https://doc.rust-lang.org/std/convert/fn.identity.html
743 [`pin::Pin`]: https://doc.rust-lang.org/std/pin/struct.Pin.html
744 [`marker::Unpin`]: https://doc.rust-lang.org/stable/std/marker/trait.Unpin.html
745 [`marker::PhantomPinned`]: https://doc.rust-lang.org/nightly/std/marker/struct.PhantomPinned.html
746 [`Vec::resize_with`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.resize_with
747 [`VecDeque::resize_with`]: https://doc.rust-lang.org/std/collections/struct.VecDeque.html#method.resize_with
748 [`Duration::as_millis`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.as_millis
749 [`Duration::as_micros`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.as_micros
750 [`Duration::as_nanos`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.as_nanos
751 [platform-support]: https://forge.rust-lang.org/platform-support.html
753 Version 1.32.0 (2019-01-17)
754 ==========================
759 - [You can now use the `?` operator in macro definitions.][56245] The `?`
760 operator allows you to specify zero or one repetitions similar to the `*` and
762 - [Module paths with no leading keyword like `super`, `self`, or `crate`, will
763 now always resolve to the item (`enum`, `struct`, etc.) available in the
764 module if present, before resolving to a external crate or an item the prelude.][56759]
767 enum Color { Red, Green, Blue }
773 - [You can now match against `PhantomData<T>` types.][55837]
774 - [You can now match against literals in macros with the `literal`
775 specifier.][56072] This will match against a literal of any type.
776 E.g. `1`, `'A'`, `"Hello World"`
777 - [Self can now be used as a constructor and pattern for unit and tuple structs.][56365] E.g.
779 struct Point(i32, i32);
782 pub fn new(x: i32, y: i32) -> Self {
786 pub fn is_origin(&self) -> bool {
794 - [Self can also now be used in type definitions.][56366] E.g.
798 Self: PartialOrd<Self> // can write `Self` instead of `List<T>`
801 Cons(T, Box<Self>) // likewise here
804 - [You can now mark traits with `#[must_use]`.][55663] This provides a warning if
805 a `impl Trait` or `dyn Trait` is returned and unused in the program.
809 - [The default allocator has changed from jemalloc to the default allocator on
810 your system.][55238] The compiler itself on Linux & macOS will still use
811 jemalloc, but programs compiled with it will use the system allocator.
812 - [Added the `aarch64-pc-windows-msvc` target.][55702]
816 - [`PathBuf` now implements `FromStr`.][55148]
817 - [`Box<[T]>` now implements `FromIterator<T>`.][55843]
818 - [The `dbg!` macro has been stabilized.][56395] This macro enables you to
819 easily debug expressions in your rust program. E.g.
822 let b = dbg!(a * 2) + 1;
823 // ^-- prints: [src/main.rs:4] a * 2 = 4
827 The following APIs are now `const` functions and can be used in a
831 - [`UnsafeCell::get`]
834 - [`ManuallyDrop::new`]
835 - [`ManuallyDrop::into_inner`]
836 - [`RangeInclusive::start`]
837 - [`RangeInclusive::end`]
838 - [`NonNull::as_ptr`]
841 - [`Duration::as_secs`]
842 - [`Duration::subsec_millis`]
843 - [`Duration::subsec_micros`]
844 - [`Duration::subsec_nanos`]
846 - [`Ipv4Addr::is_unspecified`]
848 - [`Ipv6Addr::octets`]
852 - [`i8::to_be_bytes`]
853 - [`i8::to_le_bytes`]
854 - [`i8::to_ne_bytes`]
855 - [`i8::from_be_bytes`]
856 - [`i8::from_le_bytes`]
857 - [`i8::from_ne_bytes`]
858 - [`i16::to_be_bytes`]
859 - [`i16::to_le_bytes`]
860 - [`i16::to_ne_bytes`]
861 - [`i16::from_be_bytes`]
862 - [`i16::from_le_bytes`]
863 - [`i16::from_ne_bytes`]
864 - [`i32::to_be_bytes`]
865 - [`i32::to_le_bytes`]
866 - [`i32::to_ne_bytes`]
867 - [`i32::from_be_bytes`]
868 - [`i32::from_le_bytes`]
869 - [`i32::from_ne_bytes`]
870 - [`i64::to_be_bytes`]
871 - [`i64::to_le_bytes`]
872 - [`i64::to_ne_bytes`]
873 - [`i64::from_be_bytes`]
874 - [`i64::from_le_bytes`]
875 - [`i64::from_ne_bytes`]
876 - [`i128::to_be_bytes`]
877 - [`i128::to_le_bytes`]
878 - [`i128::to_ne_bytes`]
879 - [`i128::from_be_bytes`]
880 - [`i128::from_le_bytes`]
881 - [`i128::from_ne_bytes`]
882 - [`isize::to_be_bytes`]
883 - [`isize::to_le_bytes`]
884 - [`isize::to_ne_bytes`]
885 - [`isize::from_be_bytes`]
886 - [`isize::from_le_bytes`]
887 - [`isize::from_ne_bytes`]
888 - [`u8::to_be_bytes`]
889 - [`u8::to_le_bytes`]
890 - [`u8::to_ne_bytes`]
891 - [`u8::from_be_bytes`]
892 - [`u8::from_le_bytes`]
893 - [`u8::from_ne_bytes`]
894 - [`u16::to_be_bytes`]
895 - [`u16::to_le_bytes`]
896 - [`u16::to_ne_bytes`]
897 - [`u16::from_be_bytes`]
898 - [`u16::from_le_bytes`]
899 - [`u16::from_ne_bytes`]
900 - [`u32::to_be_bytes`]
901 - [`u32::to_le_bytes`]
902 - [`u32::to_ne_bytes`]
903 - [`u32::from_be_bytes`]
904 - [`u32::from_le_bytes`]
905 - [`u32::from_ne_bytes`]
906 - [`u64::to_be_bytes`]
907 - [`u64::to_le_bytes`]
908 - [`u64::to_ne_bytes`]
909 - [`u64::from_be_bytes`]
910 - [`u64::from_le_bytes`]
911 - [`u64::from_ne_bytes`]
912 - [`u128::to_be_bytes`]
913 - [`u128::to_le_bytes`]
914 - [`u128::to_ne_bytes`]
915 - [`u128::from_be_bytes`]
916 - [`u128::from_le_bytes`]
917 - [`u128::from_ne_bytes`]
918 - [`usize::to_be_bytes`]
919 - [`usize::to_le_bytes`]
920 - [`usize::to_ne_bytes`]
921 - [`usize::from_be_bytes`]
922 - [`usize::from_le_bytes`]
923 - [`usize::from_ne_bytes`]
927 - [You can now run `cargo c` as an alias for `cargo check`.][cargo/6218]
928 - [Usernames are now allowed in alt registry URLs.][cargo/6242]
932 - [`libproc_macro` has been added to the `rust-src` distribution.][55280]
936 - [The argument types for AVX's
937 `_mm256_stream_si256`, `_mm256_stream_pd`, `_mm256_stream_ps`][55610] have
938 been changed from `*const` to `*mut` as the previous implementation
942 [55148]: https://github.com/rust-lang/rust/pull/55148/
943 [55238]: https://github.com/rust-lang/rust/pull/55238/
944 [55280]: https://github.com/rust-lang/rust/pull/55280/
945 [55610]: https://github.com/rust-lang/rust/pull/55610/
946 [55663]: https://github.com/rust-lang/rust/pull/55663/
947 [55702]: https://github.com/rust-lang/rust/pull/55702/
948 [55837]: https://github.com/rust-lang/rust/pull/55837/
949 [55843]: https://github.com/rust-lang/rust/pull/55843/
950 [56072]: https://github.com/rust-lang/rust/pull/56072/
951 [56245]: https://github.com/rust-lang/rust/pull/56245/
952 [56365]: https://github.com/rust-lang/rust/pull/56365/
953 [56366]: https://github.com/rust-lang/rust/pull/56366/
954 [56395]: https://github.com/rust-lang/rust/pull/56395/
955 [56759]: https://github.com/rust-lang/rust/pull/56759/
956 [cargo/6218]: https://github.com/rust-lang/cargo/pull/6218/
957 [cargo/6242]: https://github.com/rust-lang/cargo/pull/6242/
958 [`CStr::as_ptr`]: https://doc.rust-lang.org/std/ffi/struct.CStr.html#method.as_ptr
959 [`Cell::as_ptr`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.as_ptr
960 [`Duration::as_secs`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.as_secs
961 [`Duration::subsec_micros`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.subsec_micros
962 [`Duration::subsec_millis`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.subsec_millis
963 [`Duration::subsec_nanos`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.subsec_nanos
964 [`Ipv4Addr::is_unspecified`]: https://doc.rust-lang.org/std/net/struct.Ipv4Addr.html#method.is_unspecified
965 [`Ipv6Addr::new`]: https://doc.rust-lang.org/std/net/struct.Ipv6Addr.html#method.new
966 [`Ipv6Addr::octets`]: https://doc.rust-lang.org/std/net/struct.Ipv6Addr.html#method.octets
967 [`ManuallyDrop::into_inner`]: https://doc.rust-lang.org/std/mem/struct.ManuallyDrop.html#method.into_inner
968 [`ManuallyDrop::new`]: https://doc.rust-lang.org/std/mem/struct.ManuallyDrop.html#method.new
969 [`NonNull::as_ptr`]: https://doc.rust-lang.org/std/ptr/struct.NonNull.html#method.as_ptr
970 [`RangeInclusive::end`]: https://doc.rust-lang.org/std/ops/struct.RangeInclusive.html#method.end
971 [`RangeInclusive::start`]: https://doc.rust-lang.org/std/ops/struct.RangeInclusive.html#method.start
972 [`UnsafeCell::get`]: https://doc.rust-lang.org/std/cell/struct.UnsafeCell.html#method.get
973 [`slice::as_ptr`]: https://doc.rust-lang.org/std/primitive.slice.html#method.as_ptr
974 [`char::is_ascii`]: https://doc.rust-lang.org/std/primitive.char.html#method.is_ascii
975 [`i128::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i128.html#method.from_be_bytes
976 [`i128::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i128.html#method.from_le_bytes
977 [`i128::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i128.html#method.from_ne_bytes
978 [`i128::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i128.html#method.to_be_bytes
979 [`i128::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i128.html#method.to_le_bytes
980 [`i128::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i128.html#method.to_ne_bytes
981 [`i16::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i16.html#method.from_be_bytes
982 [`i16::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i16.html#method.from_le_bytes
983 [`i16::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i16.html#method.from_ne_bytes
984 [`i16::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i16.html#method.to_be_bytes
985 [`i16::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i16.html#method.to_le_bytes
986 [`i16::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i16.html#method.to_ne_bytes
987 [`i32::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i32.html#method.from_be_bytes
988 [`i32::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i32.html#method.from_le_bytes
989 [`i32::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i32.html#method.from_ne_bytes
990 [`i32::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i32.html#method.to_be_bytes
991 [`i32::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i32.html#method.to_le_bytes
992 [`i32::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i32.html#method.to_ne_bytes
993 [`i64::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i64.html#method.from_be_bytes
994 [`i64::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i64.html#method.from_le_bytes
995 [`i64::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i64.html#method.from_ne_bytes
996 [`i64::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i64.html#method.to_be_bytes
997 [`i64::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i64.html#method.to_le_bytes
998 [`i64::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i64.html#method.to_ne_bytes
999 [`i8::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i8.html#method.from_be_bytes
1000 [`i8::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i8.html#method.from_le_bytes
1001 [`i8::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i8.html#method.from_ne_bytes
1002 [`i8::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i8.html#method.to_be_bytes
1003 [`i8::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i8.html#method.to_le_bytes
1004 [`i8::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i8.html#method.to_ne_bytes
1005 [`isize::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.isize.html#method.from_be_bytes
1006 [`isize::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.isize.html#method.from_le_bytes
1007 [`isize::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.isize.html#method.from_ne_bytes
1008 [`isize::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.isize.html#method.to_be_bytes
1009 [`isize::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.isize.html#method.to_le_bytes
1010 [`isize::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.isize.html#method.to_ne_bytes
1011 [`iter::empty`]: https://doc.rust-lang.org/std/iter/fn.empty.html
1012 [`str::as_ptr`]: https://doc.rust-lang.org/std/primitive.str.html#method.as_ptr
1013 [`u128::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u128.html#method.from_be_bytes
1014 [`u128::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u128.html#method.from_le_bytes
1015 [`u128::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u128.html#method.from_ne_bytes
1016 [`u128::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u128.html#method.to_be_bytes
1017 [`u128::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u128.html#method.to_le_bytes
1018 [`u128::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u128.html#method.to_ne_bytes
1019 [`u16::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u16.html#method.from_be_bytes
1020 [`u16::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u16.html#method.from_le_bytes
1021 [`u16::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u16.html#method.from_ne_bytes
1022 [`u16::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u16.html#method.to_be_bytes
1023 [`u16::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u16.html#method.to_le_bytes
1024 [`u16::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u16.html#method.to_ne_bytes
1025 [`u32::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u32.html#method.from_be_bytes
1026 [`u32::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u32.html#method.from_le_bytes
1027 [`u32::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u32.html#method.from_ne_bytes
1028 [`u32::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u32.html#method.to_be_bytes
1029 [`u32::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u32.html#method.to_le_bytes
1030 [`u32::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u32.html#method.to_ne_bytes
1031 [`u64::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u64.html#method.from_be_bytes
1032 [`u64::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u64.html#method.from_le_bytes
1033 [`u64::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u64.html#method.from_ne_bytes
1034 [`u64::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u64.html#method.to_be_bytes
1035 [`u64::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u64.html#method.to_le_bytes
1036 [`u64::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u64.html#method.to_ne_bytes
1037 [`u8::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u8.html#method.from_be_bytes
1038 [`u8::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u8.html#method.from_le_bytes
1039 [`u8::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u8.html#method.from_ne_bytes
1040 [`u8::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u8.html#method.to_be_bytes
1041 [`u8::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u8.html#method.to_le_bytes
1042 [`u8::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u8.html#method.to_ne_bytes
1043 [`usize::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.usize.html#method.from_be_bytes
1044 [`usize::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.usize.html#method.from_le_bytes
1045 [`usize::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.usize.html#method.from_ne_bytes
1046 [`usize::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.usize.html#method.to_be_bytes
1047 [`usize::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.usize.html#method.to_le_bytes
1048 [`usize::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.usize.html#method.to_ne_bytes
1051 Version 1.31.1 (2018-12-20)
1052 ===========================
1054 - [Fix Rust failing to build on `powerpc-unknown-netbsd`][56562]
1055 - [Fix broken go-to-definition in RLS][rls/1171]
1056 - [Fix infinite loop on hover in RLS][rls/1170]
1058 [56562]: https://github.com/rust-lang/rust/pull/56562
1059 [rls/1171]: https://github.com/rust-lang/rls/issues/1171
1060 [rls/1170]: https://github.com/rust-lang/rls/pull/1170
1062 Version 1.31.0 (2018-12-06)
1063 ==========================
1067 - 🎉 [This version marks the release of the 2018 edition of Rust.][54057] 🎉
1068 - [New lifetime elision rules now allow for eliding lifetimes in functions and
1069 impl headers.][54778] E.g. `impl<'a> Reader for BufReader<'a> {}` can now be
1070 `impl Reader for BufReader<'_> {}`. Lifetimes are still required to be defined
1072 - [You can now define and use `const` functions.][54835] These are currently
1073 a strict minimal subset of the [const fn RFC][RFC-911]. Refer to the
1074 [language reference][const-reference] for what exactly is available.
1075 - [You can now use tool lints, which allow you to scope lints from external
1076 tools using attributes.][54870] E.g. `#[allow(clippy::filter_map)]`.
1077 - [`#[no_mangle]` and `#[export_name]` attributes can now be located anywhere in
1078 a crate, not just in exported functions.][54451]
1079 - [You can now use parentheses in pattern matches.][54497]
1083 - [Updated musl to 1.1.20][54430]
1087 - [You can now convert `num::NonZero*` types to their raw equivalents using the
1088 `From` trait.][54240] E.g. `u8` now implements `From<NonZeroU8>`.
1089 - [You can now convert a `&Option<T>` into `Option<&T>` and `&mut Option<T>`
1090 into `Option<&mut T>` using the `From` trait.][53218]
1091 - [You can now multiply (`*`) a `time::Duration` by a `u32`.][52813]
1096 - [`slice::align_to`]
1097 - [`slice::align_to_mut`]
1098 - [`slice::chunks_exact`]
1099 - [`slice::chunks_exact_mut`]
1100 - [`slice::rchunks`]
1101 - [`slice::rchunks_mut`]
1102 - [`slice::rchunks_exact`]
1103 - [`slice::rchunks_exact_mut`]
1104 - [`Option::replace`]
1108 - [Cargo will now download crates in parallel using HTTP/2.][cargo/6005]
1109 - [You can now rename packages in your Cargo.toml][cargo/6319] We have a guide
1110 on [how to use the `package` key in your dependencies.][cargo-rename-reference]
1112 [52813]: https://github.com/rust-lang/rust/pull/52813/
1113 [53218]: https://github.com/rust-lang/rust/pull/53218/
1114 [53555]: https://github.com/rust-lang/rust/issues/53555/
1115 [54057]: https://github.com/rust-lang/rust/pull/54057/
1116 [54240]: https://github.com/rust-lang/rust/pull/54240/
1117 [54430]: https://github.com/rust-lang/rust/pull/54430/
1118 [54451]: https://github.com/rust-lang/rust/pull/54451/
1119 [54497]: https://github.com/rust-lang/rust/pull/54497/
1120 [54778]: https://github.com/rust-lang/rust/pull/54778/
1121 [54835]: https://github.com/rust-lang/rust/pull/54835/
1122 [54870]: https://github.com/rust-lang/rust/pull/54870/
1123 [RFC-911]: https://github.com/rust-lang/rfcs/pull/911
1124 [`Option::replace`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.replace
1125 [`slice::align_to_mut`]: https://doc.rust-lang.org/std/primitive.slice.html#method.align_to_mut
1126 [`slice::align_to`]: https://doc.rust-lang.org/std/primitive.slice.html#method.align_to
1127 [`slice::chunks_exact_mut`]: https://doc.rust-lang.org/std/primitive.slice.html#method.chunks_exact_mut
1128 [`slice::chunks_exact`]: https://doc.rust-lang.org/std/primitive.slice.html#method.chunks_exact
1129 [`slice::rchunks_exact_mut`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rchunks_mut
1130 [`slice::rchunks_exact`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rchunks_exact
1131 [`slice::rchunks_mut`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rchunks_mut
1132 [`slice::rchunks`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rchunks
1133 [cargo/6005]: https://github.com/rust-lang/cargo/pull/6005/
1134 [cargo/6319]: https://github.com/rust-lang/cargo/pull/6319/
1135 [cargo-rename-reference]: https://doc.rust-lang.org/cargo/reference/specifying-dependencies.html#renaming-dependencies-in-cargotoml
1136 [const-reference]: https://doc.rust-lang.org/reference/items/functions.html#const-functions
1138 Version 1.30.1 (2018-11-08)
1139 ===========================
1141 - [Fixed overflow ICE in rustdoc][54199]
1142 - [Cap Cargo progress bar width at 60 in MSYS terminals][cargo/6122]
1144 [54199]: https://github.com/rust-lang/rust/pull/54199
1145 [cargo/6122]: https://github.com/rust-lang/cargo/pull/6122
1147 Version 1.30.0 (2018-10-25)
1148 ==========================
1152 - [Procedural macros are now available.][52081] These kinds of macros allow for
1153 more powerful code generation. There is a [new chapter available][proc-macros]
1154 in the Rust Programming Language book that goes further in depth.
1155 - [You can now use keywords as identifiers using the raw identifiers
1156 syntax (`r#`),][53236] e.g. `let r#for = true;`
1157 - [Using anonymous parameters in traits is now deprecated with a warning and
1158 will be a hard error in the 2018 edition.][53272]
1159 - [You can now use `crate` in paths.][54404] This allows you to refer to the
1160 crate root in the path, e.g. `use crate::foo;` refers to `foo` in `src/lib.rs`.
1161 - [Using a external crate no longer requires being prefixed with `::`.][54404]
1162 Previously, using a external crate in a module without a use statement
1163 required `let json = ::serde_json::from_str(foo);` but can now be written
1164 as `let json = serde_json::from_str(foo);`.
1165 - [You can now apply the `#[used]` attribute to static items to prevent the
1166 compiler from optimising them away, even if they appear to be unused,][51363]
1167 e.g. `#[used] static FOO: u32 = 1;`
1168 - [You can now import and reexport macros from other crates with the `use`
1169 syntax.][50911] Macros exported with `#[macro_export]` are now placed into
1170 the root module of the crate. If your macro relies on calling other local
1171 macros, it is recommended to export with the
1172 `#[macro_export(local_inner_macros)]` attribute so users won't have to import
1174 - [You can now catch visibility keywords (e.g. `pub`, `pub(crate)`) in macros
1175 using the `vis` specifier.][53370]
1176 - [Non-macro attributes now allow all forms of literals, not just
1177 strings.][53044] Previously, you would write `#[attr("true")]`, and you can now
1178 write `#[attr(true)]`.
1179 - [You can now specify a function to handle a panic in the Rust runtime with the
1180 `#[panic_handler]` attribute.][51366]
1184 - [Added the `riscv32imc-unknown-none-elf` target.][53822]
1185 - [Added the `aarch64-unknown-netbsd` target][53165]
1189 - [`ManuallyDrop` now allows the inner type to be unsized.][53033]
1193 - [`Ipv4Addr::BROADCAST`]
1194 - [`Ipv4Addr::LOCALHOST`]
1195 - [`Ipv4Addr::UNSPECIFIED`]
1196 - [`Ipv6Addr::LOCALHOST`]
1197 - [`Ipv6Addr::UNSPECIFIED`]
1198 - [`Iterator::find_map`]
1200 The following methods are replacement methods for `trim_left`, `trim_right`,
1201 `trim_left_matches`, and `trim_right_matches`, which will be deprecated
1203 - [`str::trim_end_matches`]
1205 - [`str::trim_start_matches`]
1206 - [`str::trim_start`]
1210 - [`cargo run` doesn't require specifying a package in workspaces.][cargo/5877]
1211 - [`cargo doc` now supports `--message-format=json`.][cargo/5878] This is
1212 equivalent to calling `rustdoc --error-format=json`.
1213 - [Cargo will now provide a progress bar for builds.][cargo/5995]
1217 - [`rustdoc` allows you to specify what edition to treat your code as with the
1218 `--edition` option.][54057]
1219 - [`rustdoc` now has the `--color` (specify whether to output color) and
1220 `--error-format` (specify error format, e.g. `json`) options.][53003]
1221 - [We now distribute a `rust-gdbgui` script that invokes `gdbgui` with Rust
1222 debug symbols.][53774]
1223 - [Attributes from Rust tools such as `rustfmt` or `clippy` are now
1224 available,][53459] e.g. `#[rustfmt::skip]` will skip formatting the next item.
1226 [50911]: https://github.com/rust-lang/rust/pull/50911/
1227 [51363]: https://github.com/rust-lang/rust/pull/51363/
1228 [51366]: https://github.com/rust-lang/rust/pull/51366/
1229 [52081]: https://github.com/rust-lang/rust/pull/52081/
1230 [53003]: https://github.com/rust-lang/rust/pull/53003/
1231 [53033]: https://github.com/rust-lang/rust/pull/53033/
1232 [53044]: https://github.com/rust-lang/rust/pull/53044/
1233 [53165]: https://github.com/rust-lang/rust/pull/53165/
1234 [53213]: https://github.com/rust-lang/rust/pull/53213/
1235 [53236]: https://github.com/rust-lang/rust/pull/53236/
1236 [53272]: https://github.com/rust-lang/rust/pull/53272/
1237 [53370]: https://github.com/rust-lang/rust/pull/53370/
1238 [53459]: https://github.com/rust-lang/rust/pull/53459/
1239 [53774]: https://github.com/rust-lang/rust/pull/53774/
1240 [53822]: https://github.com/rust-lang/rust/pull/53822/
1241 [54057]: https://github.com/rust-lang/rust/pull/54057/
1242 [54146]: https://github.com/rust-lang/rust/pull/54146/
1243 [54404]: https://github.com/rust-lang/rust/pull/54404/
1244 [cargo/5877]: https://github.com/rust-lang/cargo/pull/5877/
1245 [cargo/5878]: https://github.com/rust-lang/cargo/pull/5878/
1246 [cargo/5995]: https://github.com/rust-lang/cargo/pull/5995/
1247 [proc-macros]: https://doc.rust-lang.org/nightly/book/2018-edition/ch19-06-macros.html
1249 [`Ipv4Addr::BROADCAST`]: https://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#associatedconstant.BROADCAST
1250 [`Ipv4Addr::LOCALHOST`]: https://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#associatedconstant.LOCALHOST
1251 [`Ipv4Addr::UNSPECIFIED`]: https://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#associatedconstant.UNSPECIFIED
1252 [`Ipv6Addr::LOCALHOST`]: https://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#associatedconstant.LOCALHOST
1253 [`Ipv6Addr::UNSPECIFIED`]: https://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#associatedconstant.UNSPECIFIED
1254 [`Iterator::find_map`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.find_map
1255 [`str::trim_end_matches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.trim_end_matches
1256 [`str::trim_end`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.trim_end
1257 [`str::trim_start_matches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.trim_start_matches
1258 [`str::trim_start`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.trim_start
1261 Version 1.29.2 (2018-10-11)
1262 ===========================
1264 - [Workaround for an aliasing-related LLVM bug, which caused miscompilation.][54639]
1265 - The `rls-preview` component on the windows-gnu targets has been restored.
1267 [54639]: https://github.com/rust-lang/rust/pull/54639
1270 Version 1.29.1 (2018-09-25)
1271 ===========================
1276 - The standard library's `str::repeat` function contained an out of bounds write
1277 caused by an integer overflow. This has been fixed by deterministically
1278 panicking when an overflow happens.
1280 Thank you to Scott McMurray for responsibly disclosing this vulnerability to
1284 Version 1.29.0 (2018-09-13)
1285 ==========================
1289 - [Bumped minimum LLVM version to 5.0.][51899]
1290 - [Added `powerpc64le-unknown-linux-musl` target.][51619]
1291 - [Added `aarch64-unknown-hermit` and `x86_64-unknown-hermit` targets.][52861]
1295 - [`Once::call_once` no longer requires `Once` to be `'static`.][52239]
1296 - [`BuildHasherDefault` now implements `PartialEq` and `Eq`.][52402]
1297 - [`Box<CStr>`, `Box<OsStr>`, and `Box<Path>` now implement `Clone`.][51912]
1298 - [Implemented `PartialEq<&str>` for `OsString` and `PartialEq<OsString>`
1300 - [`Cell<T>` now allows `T` to be unsized.][50494]
1301 - [`SocketAddr` is now stable on Redox.][52656]
1306 - [`Iterator::flatten`]
1311 - [Cargo can silently fix some bad lockfiles.][cargo/5831] You can use
1312 `--locked` to disable this behavior.
1313 - [`cargo-install` will now allow you to cross compile an install
1314 using `--target`.][cargo/5614]
1315 - [Added the `cargo-fix` subcommand to automatically move project code from
1316 2015 edition to 2018.][cargo/5723]
1317 - [`cargo doc` can now optionally document private types using the
1318 `--document-private-items` flag.][cargo/5543]
1322 - [`rustdoc` now has the `--cap-lints` option which demotes all lints above
1323 the specified level to that level.][52354] For example `--cap-lints warn`
1324 will demote `deny` and `forbid` lints to `warn`.
1325 - [`rustc` and `rustdoc` will now have the exit code of `1` if compilation
1326 fails and `101` if there is a panic.][52197]
1327 - [A preview of clippy has been made available through rustup.][51122]
1328 You can install the preview with `rustup component add clippy-preview`.
1332 - [`str::{slice_unchecked, slice_unchecked_mut}` are now deprecated.][51807]
1333 Use `str::get_unchecked(begin..end)` instead.
1334 - [`std::env::home_dir` is now deprecated for its unintuitive behavior.][51656]
1335 Consider using the `home_dir` function from
1336 https://crates.io/crates/dirs instead.
1337 - [`rustc` will no longer silently ignore invalid data in target spec.][52330]
1338 - [`cfg` attributes and `--cfg` command line flags are now more
1339 strictly validated.][53893]
1341 [53893]: https://github.com/rust-lang/rust/pull/53893/
1342 [52861]: https://github.com/rust-lang/rust/pull/52861/
1343 [52656]: https://github.com/rust-lang/rust/pull/52656/
1344 [52239]: https://github.com/rust-lang/rust/pull/52239/
1345 [52330]: https://github.com/rust-lang/rust/pull/52330/
1346 [52354]: https://github.com/rust-lang/rust/pull/52354/
1347 [52402]: https://github.com/rust-lang/rust/pull/52402/
1348 [52103]: https://github.com/rust-lang/rust/pull/52103/
1349 [52197]: https://github.com/rust-lang/rust/pull/52197/
1350 [51807]: https://github.com/rust-lang/rust/pull/51807/
1351 [51899]: https://github.com/rust-lang/rust/pull/51899/
1352 [51912]: https://github.com/rust-lang/rust/pull/51912/
1353 [51511]: https://github.com/rust-lang/rust/pull/51511/
1354 [51619]: https://github.com/rust-lang/rust/pull/51619/
1355 [51656]: https://github.com/rust-lang/rust/pull/51656/
1356 [51178]: https://github.com/rust-lang/rust/pull/51178/
1357 [51122]: https://github.com/rust-lang/rust/pull/51122
1358 [50494]: https://github.com/rust-lang/rust/pull/50494/
1359 [cargo/5543]: https://github.com/rust-lang/cargo/pull/5543
1360 [cargo/5614]: https://github.com/rust-lang/cargo/pull/5614/
1361 [cargo/5723]: https://github.com/rust-lang/cargo/pull/5723/
1362 [cargo/5831]: https://github.com/rust-lang/cargo/pull/5831/
1363 [`Arc::downcast`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.downcast
1364 [`Iterator::flatten`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.flatten
1365 [`Rc::downcast`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.downcast
1368 Version 1.28.0 (2018-08-02)
1369 ===========================
1373 - [The `#[repr(transparent)]` attribute is now stable.][51562] This attribute
1374 allows a Rust newtype wrapper (`struct NewType<T>(T);`) to be represented as
1375 the inner type across Foreign Function Interface (FFI) boundaries.
1376 - [The keywords `pure`, `sizeof`, `alignof`, and `offsetof` have been unreserved
1377 and can now be used as identifiers.][51196]
1378 - [The `GlobalAlloc` trait and `#[global_allocator]` attribute are now
1379 stable.][51241] This will allow users to specify a global allocator for
1381 - [Unit test functions marked with the `#[test]` attribute can now return
1382 `Result<(), E: Debug>` in addition to `()`.][51298]
1383 - [The `lifetime` specifier for `macro_rules!` is now stable.][50385] This
1384 allows macros to easily target lifetimes.
1388 - [The `s` and `z` optimisation levels are now stable.][50265] These optimisations
1389 prioritise making smaller binary sizes. `z` is the same as `s` with the
1390 exception that it does not vectorise loops, which typically results in an even
1392 - [The short error format is now stable.][49546] Specified with
1393 `--error-format=short` this option will provide a more compressed output of
1394 rust error messages.
1395 - [Added a lint warning when you have duplicated `macro_export`s.][50143]
1396 - [Reduced the number of allocations in the macro parser.][50855] This can
1397 improve compile times of macro heavy crates on average by 5%.
1401 - [Implemented `Default` for `&mut str`.][51306]
1402 - [Implemented `From<bool>` for all integer and unsigned number types.][50554]
1403 - [Implemented `Extend` for `()`.][50234]
1404 - [The `Debug` implementation of `time::Duration` should now be more easily
1405 human readable.][50364] Previously a `Duration` of one second would printed as
1406 `Duration { secs: 1, nanos: 0 }` and will now be printed as `1s`.
1407 - [Implemented `From<&String>` for `Cow<str>`, `From<&Vec<T>>` for `Cow<[T]>`,
1408 `From<Cow<CStr>>` for `CString`, `From<CString>, From<CStr>, From<&CString>`
1409 for `Cow<CStr>`, `From<OsString>, From<OsStr>, From<&OsString>` for
1410 `Cow<OsStr>`, `From<&PathBuf>` for `Cow<Path>`, and `From<Cow<Path>>`
1411 for `PathBuf`.][50170]
1412 - [Implemented `Shl` and `Shr` for `Wrapping<u128>`
1413 and `Wrapping<i128>`.][50465]
1414 - [`DirEntry::metadata` now uses `fstatat` instead of `lstat` when
1415 possible.][51050] This can provide up to a 40% speed increase.
1416 - [Improved error messages when using `format!`.][50610]
1420 - [`Iterator::step_by`]
1421 - [`Path::ancestors`]
1422 - [`SystemTime::UNIX_EPOCH`]
1423 - [`alloc::GlobalAlloc`]
1425 - [`alloc::LayoutErr`]
1428 - [`alloc::alloc_zeroed`]
1429 - [`alloc::dealloc`]
1430 - [`alloc::realloc`]
1431 - [`alloc::handle_alloc_error`]
1432 - [`btree_map::Entry::or_default`]
1433 - [`fmt::Alignment`]
1434 - [`hash_map::Entry::or_default`]
1435 - [`iter::repeat_with`]
1436 - [`num::NonZeroUsize`]
1437 - [`num::NonZeroU128`]
1438 - [`num::NonZeroU16`]
1439 - [`num::NonZeroU32`]
1440 - [`num::NonZeroU64`]
1441 - [`num::NonZeroU8`]
1442 - [`ops::RangeBounds`]
1443 - [`slice::SliceIndex`]
1444 - [`slice::from_mut`]
1445 - [`slice::from_ref`]
1446 - [`{Any + Send + Sync}::downcast_mut`]
1447 - [`{Any + Send + Sync}::downcast_ref`]
1448 - [`{Any + Send + Sync}::is`]
1452 - [Cargo will now no longer allow you to publish crates with build scripts that
1453 modify the `src` directory.][cargo/5584] The `src` directory in a crate should be
1454 considered to be immutable.
1458 - [The `suggestion_applicability` field in `rustc`'s json output is now
1459 stable.][50486] This will allow dev tools to check whether a code suggestion
1460 would apply to them.
1464 - [Rust will consider trait objects with duplicated constraints to be the same
1465 type as without the duplicated constraint.][51276] For example the below code will
1466 now fail to compile.
1471 fn test(&self) { println!("one"); } //~ ERROR duplicate definitions with name `test`
1474 impl Trait + Send + Send {
1475 fn test(&self) { println!("two"); }
1479 [49546]: https://github.com/rust-lang/rust/pull/49546/
1480 [50143]: https://github.com/rust-lang/rust/pull/50143/
1481 [50170]: https://github.com/rust-lang/rust/pull/50170/
1482 [50234]: https://github.com/rust-lang/rust/pull/50234/
1483 [50265]: https://github.com/rust-lang/rust/pull/50265/
1484 [50364]: https://github.com/rust-lang/rust/pull/50364/
1485 [50385]: https://github.com/rust-lang/rust/pull/50385/
1486 [50465]: https://github.com/rust-lang/rust/pull/50465/
1487 [50486]: https://github.com/rust-lang/rust/pull/50486/
1488 [50554]: https://github.com/rust-lang/rust/pull/50554/
1489 [50610]: https://github.com/rust-lang/rust/pull/50610/
1490 [50855]: https://github.com/rust-lang/rust/pull/50855/
1491 [51050]: https://github.com/rust-lang/rust/pull/51050/
1492 [51196]: https://github.com/rust-lang/rust/pull/51196/
1493 [51200]: https://github.com/rust-lang/rust/pull/51200/
1494 [51241]: https://github.com/rust-lang/rust/pull/51241/
1495 [51276]: https://github.com/rust-lang/rust/pull/51276/
1496 [51298]: https://github.com/rust-lang/rust/pull/51298/
1497 [51306]: https://github.com/rust-lang/rust/pull/51306/
1498 [51562]: https://github.com/rust-lang/rust/pull/51562/
1499 [cargo/5584]: https://github.com/rust-lang/cargo/pull/5584/
1500 [`Iterator::step_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.step_by
1501 [`Path::ancestors`]: https://doc.rust-lang.org/std/path/struct.Path.html#method.ancestors
1502 [`SystemTime::UNIX_EPOCH`]: https://doc.rust-lang.org/std/time/struct.SystemTime.html#associatedconstant.UNIX_EPOCH
1503 [`alloc::GlobalAlloc`]: https://doc.rust-lang.org/std/alloc/trait.GlobalAlloc.html
1504 [`alloc::Layout`]: https://doc.rust-lang.org/std/alloc/struct.Layout.html
1505 [`alloc::LayoutErr`]: https://doc.rust-lang.org/std/alloc/struct.LayoutErr.html
1506 [`alloc::System`]: https://doc.rust-lang.org/std/alloc/struct.System.html
1507 [`alloc::alloc`]: https://doc.rust-lang.org/std/alloc/fn.alloc.html
1508 [`alloc::alloc_zeroed`]: https://doc.rust-lang.org/std/alloc/fn.alloc_zeroed.html
1509 [`alloc::dealloc`]: https://doc.rust-lang.org/std/alloc/fn.dealloc.html
1510 [`alloc::realloc`]: https://doc.rust-lang.org/std/alloc/fn.realloc.html
1511 [`alloc::handle_alloc_error`]: https://doc.rust-lang.org/std/alloc/fn.handle_alloc_error.html
1512 [`btree_map::Entry::or_default`]: https://doc.rust-lang.org/std/collections/btree_map/enum.Entry.html#method.or_default
1513 [`fmt::Alignment`]: https://doc.rust-lang.org/std/fmt/enum.Alignment.html
1514 [`hash_map::Entry::or_default`]: https://doc.rust-lang.org/std/collections/hash_map/enum.Entry.html#method.or_default
1515 [`iter::repeat_with`]: https://doc.rust-lang.org/std/iter/fn.repeat_with.html
1516 [`num::NonZeroUsize`]: https://doc.rust-lang.org/std/num/struct.NonZeroUsize.html
1517 [`num::NonZeroU128`]: https://doc.rust-lang.org/std/num/struct.NonZeroU128.html
1518 [`num::NonZeroU16`]: https://doc.rust-lang.org/std/num/struct.NonZeroU16.html
1519 [`num::NonZeroU32`]: https://doc.rust-lang.org/std/num/struct.NonZeroU32.html
1520 [`num::NonZeroU64`]: https://doc.rust-lang.org/std/num/struct.NonZeroU64.html
1521 [`num::NonZeroU8`]: https://doc.rust-lang.org/std/num/struct.NonZeroU8.html
1522 [`ops::RangeBounds`]: https://doc.rust-lang.org/std/ops/trait.RangeBounds.html
1523 [`slice::SliceIndex`]: https://doc.rust-lang.org/std/slice/trait.SliceIndex.html
1524 [`slice::from_mut`]: https://doc.rust-lang.org/std/slice/fn.from_mut.html
1525 [`slice::from_ref`]: https://doc.rust-lang.org/std/slice/fn.from_ref.html
1526 [`{Any + Send + Sync}::downcast_mut`]: https://doc.rust-lang.org/std/any/trait.Any.html#method.downcast_mut-2
1527 [`{Any + Send + Sync}::downcast_ref`]: https://doc.rust-lang.org/std/any/trait.Any.html#method.downcast_ref-2
1528 [`{Any + Send + Sync}::is`]: https://doc.rust-lang.org/std/any/trait.Any.html#method.is-2
1530 Version 1.27.2 (2018-07-20)
1531 ===========================
1536 - The borrow checker was fixed to avoid potential unsoundness when using
1537 match ergonomics: [#52213][52213].
1539 [52213]: https://github.com/rust-lang/rust/issues/52213
1541 Version 1.27.1 (2018-07-10)
1542 ===========================
1547 - rustdoc would execute plugins in the /tmp/rustdoc/plugins directory
1548 when running, which enabled executing code as some other user on a
1549 given machine. This release fixes that vulnerability; you can read
1550 more about this on the [blog][rustdoc-sec]. The associated CVE is [CVE-2018-1000622].
1552 Thank you to Red Hat for responsibly disclosing this vulnerability to us.
1557 - The borrow checker was fixed to avoid an additional potential unsoundness when using
1558 match ergonomics: [#51415][51415], [#49534][49534].
1560 [51415]: https://github.com/rust-lang/rust/issues/51415
1561 [49534]: https://github.com/rust-lang/rust/issues/49534
1562 [rustdoc-sec]: https://blog.rust-lang.org/2018/07/06/security-advisory-for-rustdoc.html
1563 [CVE-2018-1000622]: https://cve.mitre.org/cgi-bin/cvename.cgi?name=%20CVE-2018-1000622
1565 Version 1.27.0 (2018-06-21)
1566 ==========================
1570 - [Removed 'proc' from the reserved keywords list.][49699] This allows `proc` to
1571 be used as an identifier.
1572 - [The dyn syntax is now available.][49968] This syntax is equivalent to the
1573 bare `Trait` syntax, and should make it clearer when being used in tandem with
1574 `impl Trait` because it is equivalent to the following syntax:
1575 `&Trait == &dyn Trait`, `&mut Trait == &mut dyn Trait`, and
1576 `Box<Trait> == Box<dyn Trait>`.
1577 - [Attributes on generic parameters such as types and lifetimes are
1578 now stable.][48851] e.g.
1579 `fn foo<#[lifetime_attr] 'a, #[type_attr] T: 'a>() {}`
1580 - [The `#[must_use]` attribute can now also be used on functions as well as
1581 types.][48925] It provides a lint that by default warns users when the
1582 value returned by a function has not been used.
1586 - [Added the `armv5te-unknown-linux-musleabi` target.][50423]
1590 - [SIMD (Single Instruction Multiple Data) on x86/x86_64 is now stable.][49664]
1591 This includes [`arch::x86`] & [`arch::x86_64`] modules which contain
1592 SIMD intrinsics, a new macro called `is_x86_feature_detected!`, the
1593 `#[target_feature(enable="")]` attribute, and adding `target_feature = ""` to
1594 the `cfg` attribute.
1595 - [A lot of methods for `[u8]`, `f32`, and `f64` previously only available in
1596 std are now available in core.][49896]
1597 - [The generic `Rhs` type parameter on `ops::{Shl, ShlAssign, Shr}` now defaults
1599 - [`std::str::replace` now has the `#[must_use]` attribute][50177] to clarify
1600 that the operation isn't done in place.
1601 - [`Clone::clone`, `Iterator::collect`, and `ToOwned::to_owned` now have
1602 the `#[must_use]` attribute][49533] to warn about unused potentially
1603 expensive allocations.
1607 - [`DoubleEndedIterator::rfind`]
1608 - [`DoubleEndedIterator::rfold`]
1609 - [`DoubleEndedIterator::try_rfold`]
1610 - [`Duration::from_micros`]
1611 - [`Duration::from_nanos`]
1612 - [`Duration::subsec_micros`]
1613 - [`Duration::subsec_millis`]
1614 - [`HashMap::remove_entry`]
1615 - [`Iterator::try_fold`]
1616 - [`Iterator::try_for_each`]
1618 - [`Option::filter`]
1619 - [`String::replace_range`]
1620 - [`Take::set_limit`]
1621 - [`hint::unreachable_unchecked`]
1622 - [`os::unix::process::parent_id`]
1623 - [`ptr::swap_nonoverlapping`]
1624 - [`slice::rsplit_mut`]
1626 - [`slice::swap_with_slice`]
1630 - [`cargo-metadata` now includes `authors`, `categories`, `keywords`,
1631 `readme`, and `repository` fields.][cargo/5386]
1632 - [`cargo-metadata` now includes a package's `metadata` table.][cargo/5360]
1633 - [Added the `--target-dir` optional argument.][cargo/5393] This allows you to specify
1634 a different directory than `target` for placing compilation artifacts.
1635 - [Cargo will be adding automatic target inference for binaries, benchmarks,
1636 examples, and tests in the Rust 2018 edition.][cargo/5335] If your project specifies
1637 specific targets, e.g. using `[[bin]]`, and have other binaries in locations
1638 where cargo would infer a binary, Cargo will produce a warning. You can
1639 disable this feature ahead of time by setting any of the following to false:
1640 `autobins`, `autobenches`, `autoexamples`, `autotests`.
1641 - [Cargo will now cache compiler information.][cargo/5359] This can be disabled by
1642 setting `CARGO_CACHE_RUSTC_INFO=0` in your environment.
1646 - [Added “The Rustc book” into the official documentation.][49707]
1647 [“The Rustc book”] documents and teaches how to use the rustc compiler.
1648 - [All books available on `doc.rust-lang.org` are now searchable.][49623]
1652 - [Calling a `CharExt` or `StrExt` method directly on core will no longer
1653 work.][49896] e.g. `::core::prelude::v1::StrExt::is_empty("")` will not
1654 compile, `"".is_empty()` will still compile.
1655 - [`Debug` output on `atomic::{AtomicBool, AtomicIsize, AtomicPtr, AtomicUsize}`
1656 will only print the inner type.][48553] E.g.
1657 `print!("{:?}", AtomicBool::new(true))` will print `true`,
1658 not `AtomicBool(true)`.
1659 - [The maximum number for `repr(align(N))` is now 2²⁹.][50378] Previously you
1660 could enter higher numbers but they were not supported by LLVM. Up to 512MB
1661 alignment should cover all use cases.
1662 - The `.description()` method on the `std::error::Error` trait
1663 [has been soft-deprecated][50163]. It is no longer required to implement it.
1665 [48553]: https://github.com/rust-lang/rust/pull/48553/
1666 [48851]: https://github.com/rust-lang/rust/pull/48851/
1667 [48925]: https://github.com/rust-lang/rust/pull/48925/
1668 [49533]: https://github.com/rust-lang/rust/pull/49533/
1669 [49623]: https://github.com/rust-lang/rust/pull/49623/
1670 [49630]: https://github.com/rust-lang/rust/pull/49630/
1671 [49664]: https://github.com/rust-lang/rust/pull/49664/
1672 [49699]: https://github.com/rust-lang/rust/pull/49699/
1673 [49707]: https://github.com/rust-lang/rust/pull/49707/
1674 [49719]: https://github.com/rust-lang/rust/pull/49719/
1675 [49896]: https://github.com/rust-lang/rust/pull/49896/
1676 [49968]: https://github.com/rust-lang/rust/pull/49968/
1677 [50163]: https://github.com/rust-lang/rust/pull/50163
1678 [50177]: https://github.com/rust-lang/rust/pull/50177/
1679 [50378]: https://github.com/rust-lang/rust/pull/50378/
1680 [50398]: https://github.com/rust-lang/rust/pull/50398/
1681 [50423]: https://github.com/rust-lang/rust/pull/50423/
1682 [cargo/5203]: https://github.com/rust-lang/cargo/pull/5203/
1683 [cargo/5335]: https://github.com/rust-lang/cargo/pull/5335/
1684 [cargo/5359]: https://github.com/rust-lang/cargo/pull/5359/
1685 [cargo/5360]: https://github.com/rust-lang/cargo/pull/5360/
1686 [cargo/5386]: https://github.com/rust-lang/cargo/pull/5386/
1687 [cargo/5393]: https://github.com/rust-lang/cargo/pull/5393/
1688 [`DoubleEndedIterator::rfind`]: https://doc.rust-lang.org/std/iter/trait.DoubleEndedIterator.html#method.rfind
1689 [`DoubleEndedIterator::rfold`]: https://doc.rust-lang.org/std/iter/trait.DoubleEndedIterator.html#method.rfold
1690 [`DoubleEndedIterator::try_rfold`]: https://doc.rust-lang.org/std/iter/trait.DoubleEndedIterator.html#method.try_rfold
1691 [`Duration::from_micros`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.from_micros
1692 [`Duration::from_nanos`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.from_nanos
1693 [`Duration::subsec_micros`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.subsec_micros
1694 [`Duration::subsec_millis`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.subsec_millis
1695 [`HashMap::remove_entry`]: https://doc.rust-lang.org/std/collections/struct.HashMap.html#method.remove_entry
1696 [`Iterator::try_fold`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.try_fold
1697 [`Iterator::try_for_each`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.try_for_each
1698 [`NonNull::cast`]: https://doc.rust-lang.org/std/ptr/struct.NonNull.html#method.cast
1699 [`Option::filter`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.filter
1700 [`String::replace_range`]: https://doc.rust-lang.org/std/string/struct.String.html#method.replace_range
1701 [`Take::set_limit`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.set_limit
1702 [`hint::unreachable_unchecked`]: https://doc.rust-lang.org/std/hint/fn.unreachable_unchecked.html
1703 [`os::unix::process::parent_id`]: https://doc.rust-lang.org/std/os/unix/process/fn.parent_id.html
1704 [`process::id`]: https://doc.rust-lang.org/std/process/fn.id.html
1705 [`ptr::swap_nonoverlapping`]: https://doc.rust-lang.org/std/ptr/fn.swap_nonoverlapping.html
1706 [`slice::rsplit_mut`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rsplit_mut
1707 [`slice::rsplit`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rsplit
1708 [`slice::swap_with_slice`]: https://doc.rust-lang.org/std/primitive.slice.html#method.swap_with_slice
1709 [`arch::x86_64`]: https://doc.rust-lang.org/std/arch/x86_64/index.html
1710 [`arch::x86`]: https://doc.rust-lang.org/std/arch/x86/index.html
1711 [“The Rustc book”]: https://doc.rust-lang.org/rustc
1714 Version 1.26.2 (2018-06-05)
1715 ==========================
1720 - [The borrow checker was fixed to avoid unsoundness when using match ergonomics.][51117]
1722 [51117]: https://github.com/rust-lang/rust/issues/51117
1725 Version 1.26.1 (2018-05-29)
1726 ==========================
1731 - [RLS now works on Windows.][50646]
1732 - [Rustfmt stopped badly formatting text in some cases.][rustfmt/2695]
1738 - [`fn main() -> impl Trait` no longer works for non-Termination
1740 This reverts an accidental stabilization.
1741 - [`NaN > NaN` no longer returns true in const-fn contexts.][50812]
1742 - [Prohibit using turbofish for `impl Trait` in method arguments.][50950]
1744 [50646]: https://github.com/rust-lang/rust/issues/50646
1745 [50656]: https://github.com/rust-lang/rust/pull/50656
1746 [50812]: https://github.com/rust-lang/rust/pull/50812
1747 [50950]: https://github.com/rust-lang/rust/issues/50950
1748 [rustfmt/2695]: https://github.com/rust-lang-nursery/rustfmt/issues/2695
1750 Version 1.26.0 (2018-05-10)
1751 ==========================
1755 - [Closures now implement `Copy` and/or `Clone` if all captured variables
1756 implement either or both traits.][49299]
1757 - [The inclusive range syntax e.g. `for x in 0..=10` is now stable.][47813]
1758 - [The `'_` lifetime is now stable. The underscore lifetime can be used anywhere a
1759 lifetime can be elided.][49458]
1760 - [`impl Trait` is now stable allowing you to have abstract types in returns
1761 or in function parameters.][49255] E.g. `fn foo() -> impl Iterator<Item=u8>` or
1762 `fn open(path: impl AsRef<Path>)`.
1763 - [Pattern matching will now automatically apply dereferences.][49394]
1764 - [128-bit integers in the form of `u128` and `i128` are now stable.][49101]
1765 - [`main` can now return `Result<(), E: Debug>`][49162] in addition to `()`.
1766 - [A lot of operations are now available in a const context.][46882] E.g. You
1767 can now index into constant arrays, reference and dereference into constants,
1768 and use tuple struct constructors.
1769 - [Fixed entry slice patterns are now stable.][48516] E.g.
1771 let points = [1, 2, 3, 4];
1773 [1, 2, 3, 4] => println!("All points were sequential."),
1774 _ => println!("Not all points were sequential."),
1781 - [LLD is now used as the default linker for `wasm32-unknown-unknown`.][48125]
1782 - [Fixed exponential projection complexity on nested types.][48296]
1783 This can provide up to a ~12% reduction in compile times for certain crates.
1784 - [Added the `--remap-path-prefix` option to rustc.][48359] Allowing you
1785 to remap path prefixes outputted by the compiler.
1786 - [Added `powerpc-unknown-netbsd` target.][48281]
1790 - [Implemented `From<u16> for usize` & `From<{u8, i16}> for isize`.][49305]
1791 - [Added hexadecimal formatting for integers with fmt::Debug][48978]
1792 e.g. `assert!(format!("{:02x?}", b"Foo\0") == "[46, 6f, 6f, 00]")`
1793 - [Implemented `Default, Hash` for `cmp::Reverse`.][48628]
1794 - [Optimized `str::repeat` being 8x faster in large cases.][48657]
1795 - [`ascii::escape_default` is now available in libcore.][48735]
1796 - [Trailing commas are now supported in std and core macros.][48056]
1797 - [Implemented `Copy, Clone` for `cmp::Reverse`][47379]
1798 - [Implemented `Clone` for `char::{ToLowercase, ToUppercase}`.][48629]
1803 - [`*const T::copy_to_nonoverlapping`]
1804 - [`*const T::copy_to`]
1805 - [`*const T::read_unaligned`]
1806 - [`*const T::read_volatile`]
1807 - [`*const T::read`]
1809 - [`*const T::wrapping_add`]
1810 - [`*const T::wrapping_sub`]
1812 - [`*mut T::copy_to_nonoverlapping`]
1813 - [`*mut T::copy_to`]
1814 - [`*mut T::read_unaligned`]
1815 - [`*mut T::read_volatile`]
1817 - [`*mut T::replace`]
1820 - [`*mut T::wrapping_add`]
1821 - [`*mut T::wrapping_sub`]
1822 - [`*mut T::write_bytes`]
1823 - [`*mut T::write_unaligned`]
1824 - [`*mut T::write_volatile`]
1827 - [`FromUtf8Error::as_bytes`]
1828 - [`LocalKey::try_with`]
1829 - [`Option::cloned`]
1830 - [`btree_map::Entry::and_modify`]
1831 - [`fs::read_to_string`]
1834 - [`hash_map::Entry::and_modify`]
1835 - [`iter::FusedIterator`]
1836 - [`ops::RangeInclusive`]
1837 - [`ops::RangeToInclusive`]
1839 - [`slice::rotate_left`]
1840 - [`slice::rotate_right`]
1841 - [`String::retain`]
1846 - [Cargo will now output path to custom commands when `-v` is
1847 passed with `--list`][cargo/5041]
1848 - [The Cargo binary version is now the same as the Rust version][cargo/5083]
1852 - [The second edition of "The Rust Programming Language" book is now recommended
1853 over the first.][48404]
1858 - [aliasing a `Fn` trait as `dyn` no longer works.][48481] E.g. the following
1859 syntax is now invalid.
1861 use std::ops::Fn as dyn;
1862 fn g(_: Box<dyn(std::fmt::Debug)>) {}
1864 - [The result of dereferences are no longer promoted to `'static`.][47408]
1868 const PAIR: &(i32, i32) = &(0, 1);
1869 let _reversed_pair: &'static _ = &(PAIR.1, PAIR.0); // Doesn't work
1872 - [Deprecate `AsciiExt` trait in favor of inherent methods.][49109]
1873 - [`".e0"` will now no longer parse as `0.0` and will instead cause
1875 - [Removed hoedown from rustdoc.][48274]
1876 - [Bounds on higher-kinded lifetimes a hard error.][48326]
1878 [46882]: https://github.com/rust-lang/rust/pull/46882
1879 [47379]: https://github.com/rust-lang/rust/pull/47379
1880 [47408]: https://github.com/rust-lang/rust/pull/47408
1881 [47813]: https://github.com/rust-lang/rust/pull/47813
1882 [48056]: https://github.com/rust-lang/rust/pull/48056
1883 [48125]: https://github.com/rust-lang/rust/pull/48125
1884 [48166]: https://github.com/rust-lang/rust/pull/48166
1885 [48235]: https://github.com/rust-lang/rust/pull/48235
1886 [48274]: https://github.com/rust-lang/rust/pull/48274
1887 [48281]: https://github.com/rust-lang/rust/pull/48281
1888 [48296]: https://github.com/rust-lang/rust/pull/48296
1889 [48326]: https://github.com/rust-lang/rust/pull/48326
1890 [48359]: https://github.com/rust-lang/rust/pull/48359
1891 [48404]: https://github.com/rust-lang/rust/pull/48404
1892 [48481]: https://github.com/rust-lang/rust/pull/48481
1893 [48516]: https://github.com/rust-lang/rust/pull/48516
1894 [48628]: https://github.com/rust-lang/rust/pull/48628
1895 [48629]: https://github.com/rust-lang/rust/pull/48629
1896 [48657]: https://github.com/rust-lang/rust/pull/48657
1897 [48735]: https://github.com/rust-lang/rust/pull/48735
1898 [48978]: https://github.com/rust-lang/rust/pull/48978
1899 [49101]: https://github.com/rust-lang/rust/pull/49101
1900 [49109]: https://github.com/rust-lang/rust/pull/49109
1901 [49121]: https://github.com/rust-lang/rust/pull/49121
1902 [49162]: https://github.com/rust-lang/rust/pull/49162
1903 [49184]: https://github.com/rust-lang/rust/pull/49184
1904 [49234]: https://github.com/rust-lang/rust/pull/49234
1905 [49255]: https://github.com/rust-lang/rust/pull/49255
1906 [49299]: https://github.com/rust-lang/rust/pull/49299
1907 [49305]: https://github.com/rust-lang/rust/pull/49305
1908 [49394]: https://github.com/rust-lang/rust/pull/49394
1909 [49458]: https://github.com/rust-lang/rust/pull/49458
1910 [`*const T::add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.add
1911 [`*const T::copy_to_nonoverlapping`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to_nonoverlapping
1912 [`*const T::copy_to`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to
1913 [`*const T::read_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_unaligned
1914 [`*const T::read_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_volatile
1915 [`*const T::read`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read
1916 [`*const T::sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.sub
1917 [`*const T::wrapping_add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_add
1918 [`*const T::wrapping_sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_sub
1919 [`*mut T::add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.add-1
1920 [`*mut T::copy_to_nonoverlapping`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to_nonoverlapping-1
1921 [`*mut T::copy_to`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to-1
1922 [`*mut T::read_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_unaligned-1
1923 [`*mut T::read_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_volatile-1
1924 [`*mut T::read`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read-1
1925 [`*mut T::replace`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.replace
1926 [`*mut T::sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.sub-1
1927 [`*mut T::swap`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.swap
1928 [`*mut T::wrapping_add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_add-1
1929 [`*mut T::wrapping_sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_sub-1
1930 [`*mut T::write_bytes`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_bytes
1931 [`*mut T::write_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_unaligned
1932 [`*mut T::write_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_volatile
1933 [`*mut T::write`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write
1934 [`Box::leak`]: https://doc.rust-lang.org/std/boxed/struct.Box.html#method.leak
1935 [`FromUtf8Error::as_bytes`]: https://doc.rust-lang.org/std/string/struct.FromUtf8Error.html#method.as_bytes
1936 [`LocalKey::try_with`]: https://doc.rust-lang.org/std/thread/struct.LocalKey.html#method.try_with
1937 [`Option::cloned`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.cloned
1938 [`btree_map::Entry::and_modify`]: https://doc.rust-lang.org/std/collections/btree_map/enum.Entry.html#method.and_modify
1939 [`fs::read_to_string`]: https://doc.rust-lang.org/std/fs/fn.read_to_string.html
1940 [`fs::read`]: https://doc.rust-lang.org/std/fs/fn.read.html
1941 [`fs::write`]: https://doc.rust-lang.org/std/fs/fn.write.html
1942 [`hash_map::Entry::and_modify`]: https://doc.rust-lang.org/std/collections/hash_map/enum.Entry.html#method.and_modify
1943 [`iter::FusedIterator`]: https://doc.rust-lang.org/std/iter/trait.FusedIterator.html
1944 [`ops::RangeInclusive`]: https://doc.rust-lang.org/std/ops/struct.RangeInclusive.html
1945 [`ops::RangeToInclusive`]: https://doc.rust-lang.org/std/ops/struct.RangeToInclusive.html
1946 [`process::id`]: https://doc.rust-lang.org/std/process/fn.id.html
1947 [`slice::rotate_left`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rotate_left
1948 [`slice::rotate_right`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rotate_right
1949 [`String::retain`]: https://doc.rust-lang.org/std/string/struct.String.html#method.retain
1950 [cargo/5041]: https://github.com/rust-lang/cargo/pull/5041
1951 [cargo/5083]: https://github.com/rust-lang/cargo/pull/5083
1954 Version 1.25.0 (2018-03-29)
1955 ==========================
1959 - [The `#[repr(align(x))]` attribute is now stable.][47006] [RFC 1358]
1960 - [You can now use nested groups of imports.][47948]
1961 e.g. `use std::{fs::File, io::Read, path::{Path, PathBuf}};`
1962 - [You can now have `|` at the start of a match arm.][47947] e.g.
1964 enum Foo { A, B, C }
1970 | Foo::B => println!("AB"),
1971 | Foo::C => println!("C"),
1978 - [Upgraded to LLVM 6.][47828]
1979 - [Added `-C lto=val` option.][47521]
1980 - [Added `i586-unknown-linux-musl` target][47282]
1984 - [Impl Send for `process::Command` on Unix.][47760]
1985 - [Impl PartialEq and Eq for `ParseCharError`.][47790]
1986 - [`UnsafeCell::into_inner` is now safe.][47204]
1987 - [Implement libstd for CloudABI.][47268]
1988 - [`Float::{from_bits, to_bits}` is now available in libcore.][46931]
1989 - [Implement `AsRef<Path>` for Component][46985]
1990 - [Implemented `Write` for `Cursor<&mut Vec<u8>>`][46830]
1991 - [Moved `Duration` to libcore.][46666]
1995 - [`Location::column`]
1998 The following functions can now be used in a constant expression.
1999 eg. `static MINUTE: Duration = Duration::from_secs(60);`
2000 - [`Duration::new`][47300]
2001 - [`Duration::from_secs`][47300]
2002 - [`Duration::from_millis`][47300]
2006 - [`cargo new` no longer removes `rust` or `rs` prefixs/suffixs.][cargo/5013]
2007 - [`cargo new` now defaults to creating a binary crate, instead of a
2008 library crate.][cargo/5029]
2012 - [Rust by example is now shipped with new releases][46196]
2016 - [Deprecated `net::lookup_host`.][47510]
2017 - [`rustdoc` has switched to pulldown as the default markdown renderer.][47398]
2018 - The borrow checker was sometimes incorrectly permitting overlapping borrows
2019 around indexing operations (see [#47349][47349]). This has been fixed (which also
2020 enabled some correct code that used to cause errors (e.g. [#33903][33903] and [#46095][46095]).
2021 - [Removed deprecated unstable attribute `#[simd]`.][47251]
2023 [33903]: https://github.com/rust-lang/rust/pull/33903
2024 [47947]: https://github.com/rust-lang/rust/pull/47947
2025 [47948]: https://github.com/rust-lang/rust/pull/47948
2026 [47760]: https://github.com/rust-lang/rust/pull/47760
2027 [47790]: https://github.com/rust-lang/rust/pull/47790
2028 [47828]: https://github.com/rust-lang/rust/pull/47828
2029 [47398]: https://github.com/rust-lang/rust/pull/47398
2030 [47510]: https://github.com/rust-lang/rust/pull/47510
2031 [47521]: https://github.com/rust-lang/rust/pull/47521
2032 [47204]: https://github.com/rust-lang/rust/pull/47204
2033 [47251]: https://github.com/rust-lang/rust/pull/47251
2034 [47268]: https://github.com/rust-lang/rust/pull/47268
2035 [47282]: https://github.com/rust-lang/rust/pull/47282
2036 [47300]: https://github.com/rust-lang/rust/pull/47300
2037 [47349]: https://github.com/rust-lang/rust/pull/47349
2038 [46931]: https://github.com/rust-lang/rust/pull/46931
2039 [46985]: https://github.com/rust-lang/rust/pull/46985
2040 [47006]: https://github.com/rust-lang/rust/pull/47006
2041 [46830]: https://github.com/rust-lang/rust/pull/46830
2042 [46095]: https://github.com/rust-lang/rust/pull/46095
2043 [46666]: https://github.com/rust-lang/rust/pull/46666
2044 [46196]: https://github.com/rust-lang/rust/pull/46196
2045 [cargo/5013]: https://github.com/rust-lang/cargo/pull/5013
2046 [cargo/5029]: https://github.com/rust-lang/cargo/pull/5029
2047 [RFC 1358]: https://github.com/rust-lang/rfcs/pull/1358
2048 [`Location::column`]: https://doc.rust-lang.org/std/panic/struct.Location.html#method.column
2049 [`ptr::NonNull`]: https://doc.rust-lang.org/std/ptr/struct.NonNull.html
2052 Version 1.24.1 (2018-03-01)
2053 ==========================
2055 - [Do not abort when unwinding through FFI][48251]
2056 - [Emit UTF-16 files for linker arguments on Windows][48318]
2057 - [Make the error index generator work again][48308]
2058 - [Cargo will warn on Windows 7 if an update is needed][cargo/5069].
2060 [48251]: https://github.com/rust-lang/rust/issues/48251
2061 [48308]: https://github.com/rust-lang/rust/issues/48308
2062 [48318]: https://github.com/rust-lang/rust/issues/48318
2063 [cargo/5069]: https://github.com/rust-lang/cargo/pull/5069
2066 Version 1.24.0 (2018-02-15)
2067 ==========================
2071 - [External `sysv64` ffi is now available.][46528]
2072 eg. `extern "sysv64" fn foo () {}`
2076 - [rustc now uses 16 codegen units by default for release builds.][46910]
2077 For the fastest builds, utilize `codegen-units=1`.
2078 - [Added `armv4t-unknown-linux-gnueabi` target.][47018]
2079 - [Add `aarch64-unknown-openbsd` support][46760]
2083 - [`str::find::<char>` now uses memchr.][46735] This should lead to a 10x
2084 improvement in performance in the majority of cases.
2085 - [`OsStr`'s `Debug` implementation is now lossless and consistent
2086 with Windows.][46798]
2087 - [`time::{SystemTime, Instant}` now implement `Hash`.][46828]
2088 - [impl `From<bool>` for `AtomicBool`][46293]
2089 - [impl `From<{CString, &CStr}>` for `{Arc<CStr>, Rc<CStr>}`][45990]
2090 - [impl `From<{OsString, &OsStr}>` for `{Arc<OsStr>, Rc<OsStr>}`][45990]
2091 - [impl `From<{PathBuf, &Path}>` for `{Arc<Path>, Rc<Path>}`][45990]
2092 - [float::from_bits now just uses transmute.][46012] This provides
2093 some optimisations from LLVM.
2094 - [Copied `AsciiExt` methods onto `char`][46077]
2095 - [Remove `T: Sized` requirement on `ptr::is_null()`][46094]
2096 - [impl `From<RecvError>` for `{TryRecvError, RecvTimeoutError}`][45506]
2097 - [Optimised `f32::{min, max}` to generate more efficient x86 assembly][47080]
2098 - [`[u8]::contains` now uses memchr which provides a 3x speed improvement][46713]
2102 - [`RefCell::replace`]
2104 - [`atomic::spin_loop_hint`]
2106 The following functions can now be used in a constant expression.
2107 eg. `let buffer: [u8; size_of::<usize>()];`, `static COUNTER: AtomicUsize = AtomicUsize::new(1);`
2109 - [`AtomicBool::new`][46287]
2110 - [`AtomicUsize::new`][46287]
2111 - [`AtomicIsize::new`][46287]
2112 - [`AtomicPtr::new`][46287]
2113 - [`Cell::new`][46287]
2114 - [`{integer}::min_value`][46287]
2115 - [`{integer}::max_value`][46287]
2116 - [`mem::size_of`][46287]
2117 - [`mem::align_of`][46287]
2118 - [`ptr::null`][46287]
2119 - [`ptr::null_mut`][46287]
2120 - [`RefCell::new`][46287]
2121 - [`UnsafeCell::new`][46287]
2125 - [Added a `workspace.default-members` config that
2126 overrides implied `--all` in virtual workspaces.][cargo/4743]
2127 - [Enable incremental by default on development builds.][cargo/4817] Also added
2128 configuration keys to `Cargo.toml` and `.cargo/config` to disable on a
2129 per-project or global basis respectively.
2136 - [Floating point types `Debug` impl now always prints a decimal point.][46831]
2137 - [`Ipv6Addr` now rejects superfluous `::`'s in IPv6 addresses][46671] This is
2138 in accordance with IETF RFC 4291 §2.2.
2139 - [Unwinding will no longer go past FFI boundaries, and will instead abort.][46833]
2140 - [`Formatter::flags` method is now deprecated.][46284] The `sign_plus`,
2141 `sign_minus`, `alternate`, and `sign_aware_zero_pad` should be used instead.
2142 - [Leading zeros in tuple struct members is now an error][47084]
2143 - [`column!()` macro is one-based instead of zero-based][46977]
2144 - [`fmt::Arguments` can no longer be shared across threads][45198]
2145 - [Access to `#[repr(packed)]` struct fields is now unsafe][44884]
2146 - [Cargo sets a different working directory for the compiler][cargo/4788]
2148 [44884]: https://github.com/rust-lang/rust/pull/44884
2149 [45198]: https://github.com/rust-lang/rust/pull/45198
2150 [45506]: https://github.com/rust-lang/rust/pull/45506
2151 [45904]: https://github.com/rust-lang/rust/pull/45904
2152 [45990]: https://github.com/rust-lang/rust/pull/45990
2153 [46012]: https://github.com/rust-lang/rust/pull/46012
2154 [46077]: https://github.com/rust-lang/rust/pull/46077
2155 [46094]: https://github.com/rust-lang/rust/pull/46094
2156 [46284]: https://github.com/rust-lang/rust/pull/46284
2157 [46287]: https://github.com/rust-lang/rust/pull/46287
2158 [46293]: https://github.com/rust-lang/rust/pull/46293
2159 [46528]: https://github.com/rust-lang/rust/pull/46528
2160 [46671]: https://github.com/rust-lang/rust/pull/46671
2161 [46713]: https://github.com/rust-lang/rust/pull/46713
2162 [46735]: https://github.com/rust-lang/rust/pull/46735
2163 [46749]: https://github.com/rust-lang/rust/pull/46749
2164 [46760]: https://github.com/rust-lang/rust/pull/46760
2165 [46798]: https://github.com/rust-lang/rust/pull/46798
2166 [46828]: https://github.com/rust-lang/rust/pull/46828
2167 [46831]: https://github.com/rust-lang/rust/pull/46831
2168 [46833]: https://github.com/rust-lang/rust/pull/46833
2169 [46910]: https://github.com/rust-lang/rust/pull/46910
2170 [46977]: https://github.com/rust-lang/rust/pull/46977
2171 [47018]: https://github.com/rust-lang/rust/pull/47018
2172 [47080]: https://github.com/rust-lang/rust/pull/47080
2173 [47084]: https://github.com/rust-lang/rust/pull/47084
2174 [cargo/4743]: https://github.com/rust-lang/cargo/pull/4743
2175 [cargo/4788]: https://github.com/rust-lang/cargo/pull/4788
2176 [cargo/4817]: https://github.com/rust-lang/cargo/pull/4817
2177 [`RefCell::replace`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.replace
2178 [`RefCell::swap`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.swap
2179 [`atomic::spin_loop_hint`]: https://doc.rust-lang.org/std/sync/atomic/fn.spin_loop_hint.html
2182 Version 1.23.0 (2018-01-04)
2183 ==========================
2187 - [Arbitrary `auto` traits are now permitted in trait objects.][45772]
2188 - [rustc now uses subtyping on the left hand side of binary operations.][45435]
2189 Which should fix some confusing errors in some operations.
2193 - [Enabled `TrapUnreachable` in LLVM which should mitigate the impact of
2194 undefined behavior.][45920]
2195 - [rustc now suggests renaming import if names clash.][45660]
2196 - [Display errors/warnings correctly when there are zero-width or
2197 wide characters.][45711]
2198 - [rustc now avoids unnecessary copies of arguments that are
2199 simple bindings][45380] This should improve memory usage on average by 5-10%.
2200 - [Updated musl used to build musl rustc to 1.1.17][45393]
2204 - [Allow a trailing comma in `assert_eq/ne` macro][45887]
2205 - [Implement Hash for raw pointers to unsized types][45483]
2206 - [impl `From<*mut T>` for `AtomicPtr<T>`][45610]
2207 - [impl `From<usize/isize>` for `AtomicUsize/AtomicIsize`.][45610]
2208 - [Removed the `T: Sync` requirement for `RwLock<T>: Send`][45267]
2209 - [Removed `T: Sized` requirement for `{<*const T>, <*mut T>}::as_ref`
2210 and `<*mut T>::as_mut`][44932]
2211 - [Optimized `Thread::{park, unpark}` implementation][45524]
2212 - [Improved `SliceExt::binary_search` performance.][45333]
2213 - [impl `FromIterator<()>` for `()`][45379]
2214 - [Copied `AsciiExt` trait methods to primitive types.][44042] Use of `AsciiExt`
2222 - [Cargo now supports uninstallation of multiple packages][cargo/4561]
2223 eg. `cargo uninstall foo bar` uninstalls `foo` and `bar`.
2224 - [Added unit test checking to `cargo check`][cargo/4592]
2225 - [Cargo now lets you install a specific version
2226 using `cargo install --version`][cargo/4637]
2230 - [Releases now ship with the Cargo book documentation.][45692]
2231 - [rustdoc now prints rendering warnings on every run.][45324]
2235 - [Changes have been made to type equality to make it more correct,
2236 in rare cases this could break some code.][45853] [Tracking issue for
2237 further information][45852]
2238 - [`char::escape_debug` now uses Unicode 10 over 9.][45571]
2239 - [Upgraded Android SDK to 27, and NDK to r15c.][45580] This drops support for
2240 Android 9, the minimum supported version is Android 14.
2241 - [Bumped the minimum LLVM to 3.9][45326]
2243 [44042]: https://github.com/rust-lang/rust/pull/44042
2244 [44932]: https://github.com/rust-lang/rust/pull/44932
2245 [45267]: https://github.com/rust-lang/rust/pull/45267
2246 [45324]: https://github.com/rust-lang/rust/pull/45324
2247 [45326]: https://github.com/rust-lang/rust/pull/45326
2248 [45333]: https://github.com/rust-lang/rust/pull/45333
2249 [45379]: https://github.com/rust-lang/rust/pull/45379
2250 [45380]: https://github.com/rust-lang/rust/pull/45380
2251 [45393]: https://github.com/rust-lang/rust/pull/45393
2252 [45435]: https://github.com/rust-lang/rust/pull/45435
2253 [45483]: https://github.com/rust-lang/rust/pull/45483
2254 [45524]: https://github.com/rust-lang/rust/pull/45524
2255 [45571]: https://github.com/rust-lang/rust/pull/45571
2256 [45580]: https://github.com/rust-lang/rust/pull/45580
2257 [45610]: https://github.com/rust-lang/rust/pull/45610
2258 [45660]: https://github.com/rust-lang/rust/pull/45660
2259 [45692]: https://github.com/rust-lang/rust/pull/45692
2260 [45711]: https://github.com/rust-lang/rust/pull/45711
2261 [45772]: https://github.com/rust-lang/rust/pull/45772
2262 [45852]: https://github.com/rust-lang/rust/issues/45852
2263 [45853]: https://github.com/rust-lang/rust/pull/45853
2264 [45887]: https://github.com/rust-lang/rust/pull/45887
2265 [45920]: https://github.com/rust-lang/rust/pull/45920
2266 [cargo/4561]: https://github.com/rust-lang/cargo/pull/4561
2267 [cargo/4592]: https://github.com/rust-lang/cargo/pull/4592
2268 [cargo/4637]: https://github.com/rust-lang/cargo/pull/4637
2271 Version 1.22.1 (2017-11-22)
2272 ==========================
2274 - [Update Cargo to fix an issue with macOS 10.13 "High Sierra"][46183]
2276 [46183]: https://github.com/rust-lang/rust/pull/46183
2278 Version 1.22.0 (2017-11-22)
2279 ==========================
2283 - [`non_snake_case` lint now allows extern no-mangle functions][44966]
2284 - [Now accepts underscores in unicode escapes][43716]
2285 - [`T op= &T` now works for numeric types.][44287] eg. `let mut x = 2; x += &8;`
2286 - [types that impl `Drop` are now allowed in `const` and `static` types][44456]
2290 - [rustc now defaults to having 16 codegen units at debug on supported platforms.][45064]
2291 - [rustc will no longer inline in codegen units when compiling for debug][45075]
2292 This should decrease compile times for debug builds.
2293 - [strict memory alignment now enabled on ARMv6][45094]
2294 - [Remove support for the PNaCl target `le32-unknown-nacl`][45041]
2298 - [Allow atomic operations up to 32 bits
2299 on `armv5te_unknown_linux_gnueabi`][44978]
2300 - [`Box<Error>` now impls `From<Cow<str>>`][44466]
2301 - [`std::mem::Discriminant` is now guaranteed to be `Send + Sync`][45095]
2302 - [`fs::copy` now returns the length of the main stream on NTFS.][44895]
2303 - [Properly detect overflow in `Instant += Duration`.][44220]
2304 - [impl `Hasher` for `{&mut Hasher, Box<Hasher>}`][44015]
2305 - [impl `fmt::Debug` for `SplitWhitespace`.][44303]
2306 - [`Option<T>` now impls `Try`][42526] This allows for using `?` with `Option` types.
2313 - [Cargo will now build multi file examples in subdirectories of the `examples`
2314 folder that have a `main.rs` file.][cargo/4496]
2315 - [Changed `[root]` to `[package]` in `Cargo.lock`][cargo/4571] Packages with
2316 the old format will continue to work and can be updated with `cargo update`.
2317 - [Now supports vendoring git repositories][cargo/3992]
2321 - [`libbacktrace` is now available on Apple platforms.][44251]
2322 - [Stabilised the `compile_fail` attribute for code fences in doc-comments.][43949]
2323 This now lets you specify that a given code example will fail to compile.
2327 - [The minimum Android version that rustc can build for has been bumped
2328 to `4.0` from `2.3`][45656]
2329 - [Allowing `T op= &T` for numeric types has broken some type
2330 inference cases][45480]
2333 [42526]: https://github.com/rust-lang/rust/pull/42526
2334 [43017]: https://github.com/rust-lang/rust/pull/43017
2335 [43716]: https://github.com/rust-lang/rust/pull/43716
2336 [43949]: https://github.com/rust-lang/rust/pull/43949
2337 [44015]: https://github.com/rust-lang/rust/pull/44015
2338 [44220]: https://github.com/rust-lang/rust/pull/44220
2339 [44251]: https://github.com/rust-lang/rust/pull/44251
2340 [44287]: https://github.com/rust-lang/rust/pull/44287
2341 [44303]: https://github.com/rust-lang/rust/pull/44303
2342 [44456]: https://github.com/rust-lang/rust/pull/44456
2343 [44466]: https://github.com/rust-lang/rust/pull/44466
2344 [44895]: https://github.com/rust-lang/rust/pull/44895
2345 [44966]: https://github.com/rust-lang/rust/pull/44966
2346 [44978]: https://github.com/rust-lang/rust/pull/44978
2347 [45041]: https://github.com/rust-lang/rust/pull/45041
2348 [45064]: https://github.com/rust-lang/rust/pull/45064
2349 [45075]: https://github.com/rust-lang/rust/pull/45075
2350 [45094]: https://github.com/rust-lang/rust/pull/45094
2351 [45095]: https://github.com/rust-lang/rust/pull/45095
2352 [45480]: https://github.com/rust-lang/rust/issues/45480
2353 [45656]: https://github.com/rust-lang/rust/pull/45656
2354 [cargo/3992]: https://github.com/rust-lang/cargo/pull/3992
2355 [cargo/4496]: https://github.com/rust-lang/cargo/pull/4496
2356 [cargo/4571]: https://github.com/rust-lang/cargo/pull/4571
2363 Version 1.21.0 (2017-10-12)
2364 ==========================
2368 - [You can now use static references for literals.][43838]
2372 let x: &'static u32 = &0;
2375 - [Relaxed path syntax. Optional `::` before `<` is now allowed in all contexts.][43540]
2378 my_macro!(Vec<i32>::new); // Always worked
2379 my_macro!(Vec::<i32>::new); // Now works
2384 - [Upgraded jemalloc to 4.5.0][43911]
2385 - [Enabled unwinding panics on Redox][43917]
2386 - [Now runs LLVM in parallel during translation phase.][43506]
2387 This should reduce peak memory usage.
2391 - [Generate builtin impls for `Clone` for all arrays and tuples that
2392 are `T: Clone`][43690]
2393 - [`Stdin`, `Stdout`, and `Stderr` now implement `AsRawFd`.][43459]
2394 - [`Rc` and `Arc` now implement `From<&[T]> where T: Clone`, `From<str>`,
2395 `From<String>`, `From<Box<T>> where T: ?Sized`, and `From<Vec<T>>`.][42565]
2400 [`std::mem::discriminant`]
2404 - [You can now call `cargo install` with multiple package names][cargo/4216]
2405 - [Cargo commands inside a virtual workspace will now implicitly
2406 pass `--all`][cargo/4335]
2407 - [Added a `[patch]` section to `Cargo.toml` to handle
2408 prepublication dependencies][cargo/4123] [RFC 1969]
2409 - [`include` & `exclude` fields in `Cargo.toml` now accept gitignore
2410 like patterns][cargo/4270]
2411 - [Added the `--all-targets` option][cargo/4400]
2412 - [Using required dependencies as a feature is now deprecated and emits
2413 a warning][cargo/4364]
2418 - [Cargo docs are moving][43916]
2419 to [doc.rust-lang.org/cargo](https://doc.rust-lang.org/cargo)
2420 - [The rustdoc book is now available][43863]
2421 at [doc.rust-lang.org/rustdoc](https://doc.rust-lang.org/rustdoc)
2422 - [Added a preview of RLS has been made available through rustup][44204]
2423 Install with `rustup component add rls-preview`
2424 - [`std::os` documentation for Unix, Linux, and Windows now appears on doc.rust-lang.org][43348]
2425 Previously only showed `std::os::unix`.
2429 - [Changes in method matching against higher-ranked types][43880] This may cause
2430 breakage in subtyping corner cases. [A more in-depth explanation is available.][info/43880]
2431 - [rustc's JSON error output's byte position start at top of file.][42973]
2432 Was previously relative to the rustc's internal `CodeMap` struct which
2433 required the unstable library `libsyntax` to correctly use.
2434 - [`unused_results` lint no longer ignores booleans][43728]
2436 [42565]: https://github.com/rust-lang/rust/pull/42565
2437 [42973]: https://github.com/rust-lang/rust/pull/42973
2438 [43348]: https://github.com/rust-lang/rust/pull/43348
2439 [43459]: https://github.com/rust-lang/rust/pull/43459
2440 [43506]: https://github.com/rust-lang/rust/pull/43506
2441 [43540]: https://github.com/rust-lang/rust/pull/43540
2442 [43690]: https://github.com/rust-lang/rust/pull/43690
2443 [43728]: https://github.com/rust-lang/rust/pull/43728
2444 [43838]: https://github.com/rust-lang/rust/pull/43838
2445 [43863]: https://github.com/rust-lang/rust/pull/43863
2446 [43880]: https://github.com/rust-lang/rust/pull/43880
2447 [43911]: https://github.com/rust-lang/rust/pull/43911
2448 [43916]: https://github.com/rust-lang/rust/pull/43916
2449 [43917]: https://github.com/rust-lang/rust/pull/43917
2450 [44204]: https://github.com/rust-lang/rust/pull/44204
2451 [cargo/4123]: https://github.com/rust-lang/cargo/pull/4123
2452 [cargo/4216]: https://github.com/rust-lang/cargo/pull/4216
2453 [cargo/4270]: https://github.com/rust-lang/cargo/pull/4270
2454 [cargo/4335]: https://github.com/rust-lang/cargo/pull/4335
2455 [cargo/4364]: https://github.com/rust-lang/cargo/pull/4364
2456 [cargo/4400]: https://github.com/rust-lang/cargo/pull/4400
2457 [RFC 1969]: https://github.com/rust-lang/rfcs/pull/1969
2458 [info/43880]: https://github.com/rust-lang/rust/issues/44224#issuecomment-330058902
2459 [`std::mem::discriminant`]: https://doc.rust-lang.org/std/mem/fn.discriminant.html
2461 Version 1.20.0 (2017-08-31)
2462 ===========================
2466 - [Associated constants are now stabilised.][42809]
2467 - [A lot of macro bugs are now fixed.][42913]
2472 - [Struct fields are now properly coerced to the expected field type.][42807]
2473 - [Enabled wasm LLVM backend][42571] WASM can now be built with the
2474 `wasm32-experimental-emscripten` target.
2475 - [Changed some of the error messages to be more helpful.][42033]
2476 - [Add support for RELRO(RELocation Read-Only) for platforms that support
2478 - [rustc now reports the total number of errors on compilation failure][43015]
2479 previously this was only the number of errors in the pass that failed.
2480 - [Expansion in rustc has been sped up 29x.][42533]
2481 - [added `msp430-none-elf` target.][43099]
2482 - [rustc will now suggest one-argument enum variant to fix type mismatch when
2484 - [Fixes backtraces on Redox][43228]
2485 - [rustc now identifies different versions of same crate when absolute paths of
2486 different types match in an error message.][42826]
2492 - [Relaxed Debug constraints on `{HashMap,BTreeMap}::{Keys,Values}`.][42854]
2493 - [Impl `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Debug`, `Hash` for unsized
2495 - [Impl `fmt::{Display, Debug}` for `Ref`, `RefMut`, `MutexGuard`,
2496 `RwLockReadGuard`, `RwLockWriteGuard`][42822]
2497 - [Impl `Clone` for `DefaultHasher`.][42799]
2498 - [Impl `Sync` for `SyncSender`.][42397]
2499 - [Impl `FromStr` for `char`][42271]
2500 - [Fixed how `{f32, f64}::{is_sign_negative, is_sign_positive}` handles
2502 - [allow messages in the `unimplemented!()` macro.][42155]
2503 ie. `unimplemented!("Waiting for 1.21 to be stable")`
2504 - [`pub(restricted)` is now supported in the `thread_local!` macro.][43185]
2505 - [Upgrade to Unicode 10.0.0][42999]
2506 - [Reimplemented `{f32, f64}::{min, max}` in Rust instead of using CMath.][42430]
2507 - [Skip the main thread's manual stack guard on Linux][43072]
2508 - [Iterator::nth for `ops::{Range, RangeFrom}` is now done in O(1) time][43077]
2509 - [`#[repr(align(N))]` attribute max number is now 2^31 - 1.][43097] This was
2511 - [`{OsStr, Path}::Display` now avoids allocations where possible][42613]
2516 - [`CStr::into_c_string`]
2517 - [`CString::as_c_str`]
2518 - [`CString::into_boxed_c_str`]
2519 - [`Chain::get_mut`]
2520 - [`Chain::get_ref`]
2521 - [`Chain::into_inner`]
2522 - [`Option::get_or_insert_with`]
2523 - [`Option::get_or_insert`]
2524 - [`OsStr::into_os_string`]
2525 - [`OsString::into_boxed_os_str`]
2528 - [`Utf8Error::error_len`]
2529 - [`char::EscapeDebug`]
2530 - [`char::escape_debug`]
2531 - [`compile_error!`]
2532 - [`f32::from_bits`]
2534 - [`f64::from_bits`]
2536 - [`mem::ManuallyDrop`]
2537 - [`slice::sort_unstable_by_key`]
2538 - [`slice::sort_unstable_by`]
2539 - [`slice::sort_unstable`]
2540 - [`str::from_boxed_utf8_unchecked`]
2541 - [`str::as_bytes_mut`]
2542 - [`str::as_bytes_mut`]
2543 - [`str::from_utf8_mut`]
2544 - [`str::from_utf8_unchecked_mut`]
2546 - [`str::get_unchecked_mut`]
2547 - [`str::get_unchecked`]
2549 - [`str::into_boxed_bytes`]
2554 - [Cargo API token location moved from `~/.cargo/config` to
2555 `~/.cargo/credentials`.][cargo/3978]
2556 - [Cargo will now build `main.rs` binaries that are in sub-directories of
2557 `src/bin`.][cargo/4214] ie. Having `src/bin/server/main.rs` and
2558 `src/bin/client/main.rs` generates `target/debug/server` and `target/debug/client`
2559 - [You can now specify version of a binary when installed through
2560 `cargo install` using `--vers`.][cargo/4229]
2561 - [Added `--no-fail-fast` flag to cargo to run all benchmarks regardless of
2562 failure.][cargo/4248]
2563 - [Changed the convention around which file is the crate root.][cargo/4259]
2564 - [The `include`/`exclude` property in `Cargo.toml` now accepts gitignore paths
2565 instead of glob patterns][cargo/4270]. Glob patterns are now deprecated.
2570 - [Functions with `'static` in their return types will now not be as usable as
2571 if they were using lifetime parameters instead.][42417]
2572 - [The reimplementation of `{f32, f64}::is_sign_{negative, positive}` now
2573 takes the sign of NaN into account where previously didn't.][42430]
2575 [42033]: https://github.com/rust-lang/rust/pull/42033
2576 [42155]: https://github.com/rust-lang/rust/pull/42155
2577 [42271]: https://github.com/rust-lang/rust/pull/42271
2578 [42397]: https://github.com/rust-lang/rust/pull/42397
2579 [42417]: https://github.com/rust-lang/rust/pull/42417
2580 [42430]: https://github.com/rust-lang/rust/pull/42430
2581 [42431]: https://github.com/rust-lang/rust/pull/42431
2582 [42533]: https://github.com/rust-lang/rust/pull/42533
2583 [42571]: https://github.com/rust-lang/rust/pull/42571
2584 [42613]: https://github.com/rust-lang/rust/pull/42613
2585 [42799]: https://github.com/rust-lang/rust/pull/42799
2586 [42807]: https://github.com/rust-lang/rust/pull/42807
2587 [42809]: https://github.com/rust-lang/rust/pull/42809
2588 [42822]: https://github.com/rust-lang/rust/pull/42822
2589 [42826]: https://github.com/rust-lang/rust/pull/42826
2590 [42854]: https://github.com/rust-lang/rust/pull/42854
2591 [42913]: https://github.com/rust-lang/rust/pull/42913
2592 [42999]: https://github.com/rust-lang/rust/pull/42999
2593 [43011]: https://github.com/rust-lang/rust/pull/43011
2594 [43015]: https://github.com/rust-lang/rust/pull/43015
2595 [43072]: https://github.com/rust-lang/rust/pull/43072
2596 [43077]: https://github.com/rust-lang/rust/pull/43077
2597 [43097]: https://github.com/rust-lang/rust/pull/43097
2598 [43099]: https://github.com/rust-lang/rust/pull/43099
2599 [43170]: https://github.com/rust-lang/rust/pull/43170
2600 [43178]: https://github.com/rust-lang/rust/pull/43178
2601 [43185]: https://github.com/rust-lang/rust/pull/43185
2602 [43228]: https://github.com/rust-lang/rust/pull/43228
2603 [cargo/3978]: https://github.com/rust-lang/cargo/pull/3978
2604 [cargo/4214]: https://github.com/rust-lang/cargo/pull/4214
2605 [cargo/4229]: https://github.com/rust-lang/cargo/pull/4229
2606 [cargo/4248]: https://github.com/rust-lang/cargo/pull/4248
2607 [cargo/4259]: https://github.com/rust-lang/cargo/pull/4259
2608 [cargo/4270]: https://github.com/rust-lang/cargo/pull/4270
2609 [`CStr::into_c_string`]: https://doc.rust-lang.org/std/ffi/struct.CStr.html#method.into_c_string
2610 [`CString::as_c_str`]: https://doc.rust-lang.org/std/ffi/struct.CString.html#method.as_c_str
2611 [`CString::into_boxed_c_str`]: https://doc.rust-lang.org/std/ffi/struct.CString.html#method.into_boxed_c_str
2612 [`Chain::get_mut`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.get_mut
2613 [`Chain::get_ref`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.get_ref
2614 [`Chain::into_inner`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.into_inner
2615 [`Option::get_or_insert_with`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.get_or_insert_with
2616 [`Option::get_or_insert`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.get_or_insert
2617 [`OsStr::into_os_string`]: https://doc.rust-lang.org/std/ffi/struct.OsStr.html#method.into_os_string
2618 [`OsString::into_boxed_os_str`]: https://doc.rust-lang.org/std/ffi/struct.OsString.html#method.into_boxed_os_str
2619 [`Take::get_mut`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.get_mut
2620 [`Take::get_ref`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.get_ref
2621 [`Utf8Error::error_len`]: https://doc.rust-lang.org/std/str/struct.Utf8Error.html#method.error_len
2622 [`char::EscapeDebug`]: https://doc.rust-lang.org/std/char/struct.EscapeDebug.html
2623 [`char::escape_debug`]: https://doc.rust-lang.org/std/primitive.char.html#method.escape_debug
2624 [`compile_error!`]: https://doc.rust-lang.org/std/macro.compile_error.html
2625 [`f32::from_bits`]: https://doc.rust-lang.org/std/primitive.f32.html#method.from_bits
2626 [`f32::to_bits`]: https://doc.rust-lang.org/std/primitive.f32.html#method.to_bits
2627 [`f64::from_bits`]: https://doc.rust-lang.org/std/primitive.f64.html#method.from_bits
2628 [`f64::to_bits`]: https://doc.rust-lang.org/std/primitive.f64.html#method.to_bits
2629 [`mem::ManuallyDrop`]: https://doc.rust-lang.org/std/mem/union.ManuallyDrop.html
2630 [`slice::sort_unstable_by_key`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable_by_key
2631 [`slice::sort_unstable_by`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable_by
2632 [`slice::sort_unstable`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable
2633 [`str::from_boxed_utf8_unchecked`]: https://doc.rust-lang.org/std/str/fn.from_boxed_utf8_unchecked.html
2634 [`str::as_bytes_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.as_bytes_mut
2635 [`str::from_utf8_mut`]: https://doc.rust-lang.org/std/str/fn.from_utf8_mut.html
2636 [`str::from_utf8_unchecked_mut`]: https://doc.rust-lang.org/std/str/fn.from_utf8_unchecked_mut.html
2637 [`str::get_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_mut
2638 [`str::get_unchecked_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_unchecked_mut
2639 [`str::get_unchecked`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_unchecked
2640 [`str::get`]: https://doc.rust-lang.org/std/primitive.str.html#method.get
2641 [`str::into_boxed_bytes`]: https://doc.rust-lang.org/std/primitive.str.html#method.into_boxed_bytes
2644 Version 1.19.0 (2017-07-20)
2645 ===========================
2650 - [Numeric fields can now be used for creating tuple structs.][41145] [RFC 1506]
2651 For example `struct Point(u32, u32); let x = Point { 0: 7, 1: 0 };`.
2652 - [Macro recursion limit increased to 1024 from 64.][41676]
2653 - [Added lint for detecting unused macros.][41907]
2654 - [`loop` can now return a value with `break`.][42016] [RFC 1624]
2655 For example: `let x = loop { break 7; };`
2656 - [C compatible `union`s are now available.][42068] [RFC 1444] They can only
2657 contain `Copy` types and cannot have a `Drop` implementation.
2658 Example: `union Foo { bar: u8, baz: usize }`
2659 - [Non capturing closures can now be coerced into `fn`s,][42162] [RFC 1558]
2660 Example: `let foo: fn(u8) -> u8 = |v: u8| { v };`
2665 - [Add support for bootstrapping the Rust compiler toolchain on Android.][41370]
2666 - [Change `arm-linux-androideabi` to correspond to the `armeabi`
2667 official ABI.][41656] If you wish to continue targeting the `armeabi-v7a` ABI
2668 you should use `--target armv7-linux-androideabi`.
2669 - [Fixed ICE when removing a source file between compilation sessions.][41873]
2670 - [Minor optimisation of string operations.][42037]
2671 - [Compiler error message is now `aborting due to previous error(s)` instead of
2672 `aborting due to N previous errors`][42150] This was previously inaccurate and
2673 would only count certain kinds of errors.
2674 - [The compiler now supports Visual Studio 2017][42225]
2675 - [The compiler is now built against LLVM 4.0.1 by default][42948]
2676 - [Added a lot][42264] of [new error codes][42302]
2677 - [Added `target-feature=+crt-static` option][37406] [RFC 1721] Which allows
2678 libraries with C Run-time Libraries(CRT) to be statically linked.
2679 - [Fixed various ARM codegen bugs][42740]
2684 - [`String` now implements `FromIterator<Cow<'a, str>>` and
2685 `Extend<Cow<'a, str>>`][41449]
2686 - [`Vec` now implements `From<&mut [T]>`][41530]
2687 - [`Box<[u8]>` now implements `From<Box<str>>`][41258]
2688 - [`SplitWhitespace` now implements `Clone`][41659]
2689 - [`[u8]::reverse` is now 5x faster and `[u16]::reverse` is now
2691 - [`eprint!` and `eprintln!` macros added to prelude.][41192] Same as the `print!`
2692 macros, but for printing to stderr.
2697 - [`OsString::shrink_to_fit`]
2700 - [`thread::ThreadId`]
2705 - [Build scripts can now add environment variables to the environment
2706 the crate is being compiled in.
2707 Example: `println!("cargo:rustc-env=FOO=bar");`][cargo/3929]
2708 - [Subcommands now replace the current process rather than spawning a new
2709 child process][cargo/3970]
2710 - [Workspace members can now accept glob file patterns][cargo/3979]
2711 - [Added `--all` flag to the `cargo bench` subcommand to run benchmarks of all
2712 the members in a given workspace.][cargo/3988]
2713 - [Updated `libssh2-sys` to 0.2.6][cargo/4008]
2714 - [Target directory path is now in the cargo metadata][cargo/4022]
2715 - [Cargo no longer checks out a local working directory for the
2716 crates.io index][cargo/4026] This should provide smaller file size for the
2717 registry, and improve cloning times, especially on Windows machines.
2718 - [Added an `--exclude` option for excluding certain packages when using the
2719 `--all` option][cargo/4031]
2720 - [Cargo will now automatically retry when receiving a 5xx error
2721 from crates.io][cargo/4032]
2722 - [The `--features` option now accepts multiple comma or space
2723 delimited values.][cargo/4084]
2724 - [Added support for custom target specific runners][cargo/3954]
2729 - [Added `rust-windbg.cmd`][39983] for loading rust `.natvis` files in the
2731 - [Rust will now release XZ compressed packages][rust-installer/57]
2732 - [rustup will now prefer to download rust packages with
2733 XZ compression][rustup/1100] over GZip packages.
2734 - [Added the ability to escape `#` in rust documentation][41785] By adding
2735 additional `#`'s ie. `##` is now `#`
2740 - [`MutexGuard<T>` may only be `Sync` if `T` is `Sync`.][41624]
2741 - [`-Z` flags are now no longer allowed to be used on the stable
2742 compiler.][41751] This has been a warning for a year previous to this.
2743 - [As a result of the `-Z` flag change, the `cargo-check` plugin no
2744 longer works][42844]. Users should migrate to the built-in `check`
2745 command, which has been available since 1.16.
2746 - [Ending a float literal with `._` is now a hard error.
2747 Example: `42._` .][41946]
2748 - [Any use of a private `extern crate` outside of its module is now a
2749 hard error.][36886] This was previously a warning.
2750 - [`use ::self::foo;` is now a hard error.][36888] `self` paths are always
2751 relative while the `::` prefix makes a path absolute, but was ignored and the
2752 path was relative regardless.
2753 - [Floating point constants in match patterns is now a hard error][36890]
2754 This was previously a warning.
2755 - [Struct or enum constants that don't derive `PartialEq` & `Eq` used
2756 match patterns is now a hard error][36891] This was previously a warning.
2757 - [Lifetimes named `'_` are no longer allowed.][36892] This was previously
2759 - [From the pound escape, lines consisting of multiple `#`s are
2761 - [It is an error to re-export private enum variants][42460]. This is
2762 known to break a number of crates that depend on an older version of
2764 - [On Windows, if `VCINSTALLDIR` is set incorrectly, `rustc` will try
2765 to use it to find the linker, and the build will fail where it did
2766 not previously][42607]
2768 [36886]: https://github.com/rust-lang/rust/issues/36886
2769 [36888]: https://github.com/rust-lang/rust/issues/36888
2770 [36890]: https://github.com/rust-lang/rust/issues/36890
2771 [36891]: https://github.com/rust-lang/rust/issues/36891
2772 [36892]: https://github.com/rust-lang/rust/issues/36892
2773 [37406]: https://github.com/rust-lang/rust/issues/37406
2774 [39983]: https://github.com/rust-lang/rust/pull/39983
2775 [41145]: https://github.com/rust-lang/rust/pull/41145
2776 [41192]: https://github.com/rust-lang/rust/pull/41192
2777 [41258]: https://github.com/rust-lang/rust/pull/41258
2778 [41370]: https://github.com/rust-lang/rust/pull/41370
2779 [41449]: https://github.com/rust-lang/rust/pull/41449
2780 [41530]: https://github.com/rust-lang/rust/pull/41530
2781 [41624]: https://github.com/rust-lang/rust/pull/41624
2782 [41656]: https://github.com/rust-lang/rust/pull/41656
2783 [41659]: https://github.com/rust-lang/rust/pull/41659
2784 [41676]: https://github.com/rust-lang/rust/pull/41676
2785 [41751]: https://github.com/rust-lang/rust/pull/41751
2786 [41764]: https://github.com/rust-lang/rust/pull/41764
2787 [41785]: https://github.com/rust-lang/rust/pull/41785
2788 [41873]: https://github.com/rust-lang/rust/pull/41873
2789 [41907]: https://github.com/rust-lang/rust/pull/41907
2790 [41946]: https://github.com/rust-lang/rust/pull/41946
2791 [42016]: https://github.com/rust-lang/rust/pull/42016
2792 [42037]: https://github.com/rust-lang/rust/pull/42037
2793 [42068]: https://github.com/rust-lang/rust/pull/42068
2794 [42150]: https://github.com/rust-lang/rust/pull/42150
2795 [42162]: https://github.com/rust-lang/rust/pull/42162
2796 [42225]: https://github.com/rust-lang/rust/pull/42225
2797 [42264]: https://github.com/rust-lang/rust/pull/42264
2798 [42302]: https://github.com/rust-lang/rust/pull/42302
2799 [42460]: https://github.com/rust-lang/rust/issues/42460
2800 [42607]: https://github.com/rust-lang/rust/issues/42607
2801 [42740]: https://github.com/rust-lang/rust/pull/42740
2802 [42844]: https://github.com/rust-lang/rust/issues/42844
2803 [42948]: https://github.com/rust-lang/rust/pull/42948
2804 [RFC 1444]: https://github.com/rust-lang/rfcs/pull/1444
2805 [RFC 1506]: https://github.com/rust-lang/rfcs/pull/1506
2806 [RFC 1558]: https://github.com/rust-lang/rfcs/pull/1558
2807 [RFC 1624]: https://github.com/rust-lang/rfcs/pull/1624
2808 [RFC 1721]: https://github.com/rust-lang/rfcs/pull/1721
2809 [`Command::envs`]: https://doc.rust-lang.org/std/process/struct.Command.html#method.envs
2810 [`OsString::shrink_to_fit`]: https://doc.rust-lang.org/std/ffi/struct.OsString.html#method.shrink_to_fit
2811 [`cmp::Reverse`]: https://doc.rust-lang.org/std/cmp/struct.Reverse.html
2812 [`thread::ThreadId`]: https://doc.rust-lang.org/std/thread/struct.ThreadId.html
2813 [cargo/3929]: https://github.com/rust-lang/cargo/pull/3929
2814 [cargo/3954]: https://github.com/rust-lang/cargo/pull/3954
2815 [cargo/3970]: https://github.com/rust-lang/cargo/pull/3970
2816 [cargo/3979]: https://github.com/rust-lang/cargo/pull/3979
2817 [cargo/3988]: https://github.com/rust-lang/cargo/pull/3988
2818 [cargo/4008]: https://github.com/rust-lang/cargo/pull/4008
2819 [cargo/4022]: https://github.com/rust-lang/cargo/pull/4022
2820 [cargo/4026]: https://github.com/rust-lang/cargo/pull/4026
2821 [cargo/4031]: https://github.com/rust-lang/cargo/pull/4031
2822 [cargo/4032]: https://github.com/rust-lang/cargo/pull/4032
2823 [cargo/4084]: https://github.com/rust-lang/cargo/pull/4084
2824 [rust-installer/57]: https://github.com/rust-lang/rust-installer/pull/57
2825 [rustup/1100]: https://github.com/rust-lang-nursery/rustup.rs/pull/1100
2828 Version 1.18.0 (2017-06-08)
2829 ===========================
2834 - [Stabilize pub(restricted)][40556] `pub` can now accept a module path to
2835 make the item visible to just that module tree. Also accepts the keyword
2836 `crate` to make something public to the whole crate but not users of the
2837 library. Example: `pub(crate) mod utils;`. [RFC 1422].
2838 - [Stabilize `#![windows_subsystem]` attribute][40870] conservative exposure of the
2839 `/SUBSYSTEM` linker flag on Windows platforms. [RFC 1665].
2840 - [Refactor of trait object type parsing][40043] Now `ty` in macros can accept
2841 types like `Write + Send`, trailing `+` are now supported in trait objects,
2842 and better error reporting for trait objects starting with `?Sized`.
2843 - [0e+10 is now a valid floating point literal][40589]
2844 - [Now warns if you bind a lifetime parameter to 'static][40734]
2845 - [Tuples, Enum variant fields, and structs with no `repr` attribute or with
2846 `#[repr(Rust)]` are reordered to minimize padding and produce a smaller
2847 representation in some cases.][40377]
2852 - [rustc can now emit mir with `--emit mir`][39891]
2853 - [Improved LLVM IR for trivial functions][40367]
2854 - [Added explanation for E0090(Wrong number of lifetimes are supplied)][40723]
2855 - [rustc compilation is now 15%-20% faster][41469] Thanks to optimisation
2856 opportunities found through profiling
2857 - [Improved backtrace formatting when panicking][38165]
2862 - [Specialized `Vec::from_iter` being passed `vec::IntoIter`][40731] if the
2863 iterator hasn't been advanced the original `Vec` is reassembled with no actual
2864 iteration or reallocation.
2865 - [Simplified HashMap Bucket interface][40561] provides performance
2866 improvements for iterating and cloning.
2867 - [Specialize Vec::from_elem to use calloc][40409]
2868 - [Fixed Race condition in fs::create_dir_all][39799]
2869 - [No longer caching stdio on Windows][40516]
2870 - [Optimized insertion sort in slice][40807] insertion sort in some cases
2871 2.50%~ faster and in one case now 12.50% faster.
2872 - [Optimized `AtomicBool::fetch_nand`][41143]
2877 - [`Child::try_wait`]
2878 - [`HashMap::retain`]
2879 - [`HashSet::retain`]
2881 - [`TcpStream::peek`]
2882 - [`UdpSocket::peek`]
2883 - [`UdpSocket::peek_from`]
2888 - [Added partial Pijul support][cargo/3842] Pijul is a version control system in Rust.
2889 You can now create new cargo projects with Pijul using `cargo new --vcs pijul`
2890 - [Now always emits build script warnings for crates that fail to build][cargo/3847]
2891 - [Added Android build support][cargo/3885]
2892 - [Added `--bins` and `--tests` flags][cargo/3901] now you can build all programs
2893 of a certain type, for example `cargo build --bins` will build all
2895 - [Added support for haiku][cargo/3952]
2900 - [rustdoc can now use pulldown-cmark with the `--enable-commonmark` flag][40338]
2901 - [Added rust-windbg script for better debugging on Windows][39983]
2902 - [Rust now uses the official cross compiler for NetBSD][40612]
2903 - [rustdoc now accepts `#` at the start of files][40828]
2904 - [Fixed jemalloc support for musl][41168]
2909 - [Changes to how the `0` flag works in format!][40241] Padding zeroes are now
2910 always placed after the sign if it exists and before the digits. With the `#`
2911 flag the zeroes are placed after the prefix and before the digits.
2912 - [Due to the struct field optimisation][40377], using `transmute` on structs
2913 that have no `repr` attribute or `#[repr(Rust)]` will no longer work. This has
2914 always been undefined behavior, but is now more likely to break in practice.
2915 - [The refactor of trait object type parsing][40043] fixed a bug where `+` was
2916 receiving the wrong priority parsing things like `&for<'a> Tr<'a> + Send` as
2917 `&(for<'a> Tr<'a> + Send)` instead of `(&for<'a> Tr<'a>) + Send`
2918 - [Overlapping inherent `impl`s are now a hard error][40728]
2919 - [`PartialOrd` and `Ord` must agree on the ordering.][41270]
2920 - [`rustc main.rs -o out --emit=asm,llvm-ir`][41085] Now will output
2921 `out.asm` and `out.ll` instead of only one of the filetypes.
2922 - [ calling a function that returns `Self` will no longer work][41805] when
2923 the size of `Self` cannot be statically determined.
2924 - [rustc now builds with a "pthreads" flavour of MinGW for Windows GNU][40805]
2925 this has caused a few regressions namely:
2927 - Changed the link order of local static/dynamic libraries (respecting the
2928 order on given rather than having the compiler reorder).
2929 - Changed how MinGW is linked, native code linked to dynamic libraries
2930 may require manually linking to the gcc support library (for the native
2933 [38165]: https://github.com/rust-lang/rust/pull/38165
2934 [39799]: https://github.com/rust-lang/rust/pull/39799
2935 [39891]: https://github.com/rust-lang/rust/pull/39891
2936 [39983]: https://github.com/rust-lang/rust/pull/39983
2937 [40043]: https://github.com/rust-lang/rust/pull/40043
2938 [40241]: https://github.com/rust-lang/rust/pull/40241
2939 [40338]: https://github.com/rust-lang/rust/pull/40338
2940 [40367]: https://github.com/rust-lang/rust/pull/40367
2941 [40377]: https://github.com/rust-lang/rust/pull/40377
2942 [40409]: https://github.com/rust-lang/rust/pull/40409
2943 [40516]: https://github.com/rust-lang/rust/pull/40516
2944 [40556]: https://github.com/rust-lang/rust/pull/40556
2945 [40561]: https://github.com/rust-lang/rust/pull/40561
2946 [40589]: https://github.com/rust-lang/rust/pull/40589
2947 [40612]: https://github.com/rust-lang/rust/pull/40612
2948 [40723]: https://github.com/rust-lang/rust/pull/40723
2949 [40728]: https://github.com/rust-lang/rust/pull/40728
2950 [40731]: https://github.com/rust-lang/rust/pull/40731
2951 [40734]: https://github.com/rust-lang/rust/pull/40734
2952 [40805]: https://github.com/rust-lang/rust/pull/40805
2953 [40807]: https://github.com/rust-lang/rust/pull/40807
2954 [40828]: https://github.com/rust-lang/rust/pull/40828
2955 [40870]: https://github.com/rust-lang/rust/pull/40870
2956 [41085]: https://github.com/rust-lang/rust/pull/41085
2957 [41143]: https://github.com/rust-lang/rust/pull/41143
2958 [41168]: https://github.com/rust-lang/rust/pull/41168
2959 [41270]: https://github.com/rust-lang/rust/issues/41270
2960 [41469]: https://github.com/rust-lang/rust/pull/41469
2961 [41805]: https://github.com/rust-lang/rust/issues/41805
2962 [RFC 1422]: https://github.com/rust-lang/rfcs/blob/master/text/1422-pub-restricted.md
2963 [RFC 1665]: https://github.com/rust-lang/rfcs/blob/master/text/1665-windows-subsystem.md
2964 [`Child::try_wait`]: https://doc.rust-lang.org/std/process/struct.Child.html#method.try_wait
2965 [`HashMap::retain`]: https://doc.rust-lang.org/std/collections/struct.HashMap.html#method.retain
2966 [`HashSet::retain`]: https://doc.rust-lang.org/std/collections/struct.HashSet.html#method.retain
2967 [`PeekMut::pop`]: https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html#method.pop
2968 [`TcpStream::peek`]: https://doc.rust-lang.org/std/net/struct.TcpStream.html#method.peek
2969 [`UdpSocket::peek_from`]: https://doc.rust-lang.org/std/net/struct.UdpSocket.html#method.peek_from
2970 [`UdpSocket::peek`]: https://doc.rust-lang.org/std/net/struct.UdpSocket.html#method.peek
2971 [cargo/3842]: https://github.com/rust-lang/cargo/pull/3842
2972 [cargo/3847]: https://github.com/rust-lang/cargo/pull/3847
2973 [cargo/3885]: https://github.com/rust-lang/cargo/pull/3885
2974 [cargo/3901]: https://github.com/rust-lang/cargo/pull/3901
2975 [cargo/3952]: https://github.com/rust-lang/cargo/pull/3952
2978 Version 1.17.0 (2017-04-27)
2979 ===========================
2984 * [The lifetime of statics and consts defaults to `'static`][39265]. [RFC 1623]
2985 * [Fields of structs may be initialized without duplicating the field/variable
2986 names][39761]. [RFC 1682]
2987 * [`Self` may be included in the `where` clause of `impls`][38864]. [RFC 1647]
2988 * [When coercing to an unsized type lifetimes must be equal][40319]. That is,
2989 there is no subtyping between `T` and `U` when `T: Unsize<U>`. For example,
2990 coercing `&mut [&'a X; N]` to `&mut [&'b X]` requires `'a` be equal to
2991 `'b`. Soundness fix.
2992 * [Values passed to the indexing operator, `[]`, automatically coerce][40166]
2993 * [Static variables may contain references to other statics][40027]
2998 * [Exit quickly on only `--emit dep-info`][40336]
2999 * [Make `-C relocation-model` more correctly determine whether the linker
3000 creates a position-independent executable][40245]
3001 * [Add `-C overflow-checks` to directly control whether integer overflow
3003 * [The rustc type checker now checks items on demand instead of in a single
3004 in-order pass][40008]. This is mostly an internal refactoring in support of
3005 future work, including incremental type checking, but also resolves [RFC
3006 1647], allowing `Self` to appear in `impl` `where` clauses.
3007 * [Optimize vtable loads][39995]
3008 * [Turn off vectorization for Emscripten targets][39990]
3009 * [Provide suggestions for unknown macros imported with `use`][39953]
3010 * [Fix ICEs in path resolution][39939]
3011 * [Strip exception handling code on Emscripten when `panic=abort`][39193]
3012 * [Add clearer error message using `&str + &str`][39116]
3023 * [`Ordering::then`]
3024 * [`Ordering::then_with`]
3025 * [`BTreeMap::range`]
3026 * [`BTreeMap::range_mut`]
3027 * [`collections::Bound`]
3028 * [`process::abort`]
3029 * [`ptr::read_unaligned`]
3030 * [`ptr::write_unaligned`]
3031 * [`Result::expect_err`]
3034 * [`Cell::into_inner`]
3040 * [`BTreeMap` and `BTreeSet` can iterate over ranges][27787]
3041 * [`Cell` can store non-`Copy` types][39793]. [RFC 1651]
3042 * [`String` implements `FromIterator<&char>`][40028]
3043 * `Box` [implements][40009] a number of new conversions:
3044 `From<Box<str>> for String`,
3045 `From<Box<[T]>> for Vec<T>`,
3046 `From<Box<CStr>> for CString`,
3047 `From<Box<OsStr>> for OsString`,
3048 `From<Box<Path>> for PathBuf`,
3049 `Into<Box<str>> for String`,
3050 `Into<Box<[T]>> for Vec<T>`,
3051 `Into<Box<CStr>> for CString`,
3052 `Into<Box<OsStr>> for OsString`,
3053 `Into<Box<Path>> for PathBuf`,
3054 `Default for Box<str>`,
3055 `Default for Box<CStr>`,
3056 `Default for Box<OsStr>`,
3057 `From<&CStr> for Box<CStr>`,
3058 `From<&OsStr> for Box<OsStr>`,
3059 `From<&Path> for Box<Path>`
3060 * [`ffi::FromBytesWithNulError` implements `Error` and `Display`][39960]
3061 * [Specialize `PartialOrd<A> for [A] where A: Ord`][39642]
3062 * [Slightly optimize `slice::sort`][39538]
3063 * [Add `ToString` trait specialization for `Cow<'a, str>` and `String`][39440]
3064 * [`Box<[T]>` implements `From<&[T]> where T: Copy`,
3065 `Box<str>` implements `From<&str>`][39438]
3066 * [`IpAddr` implements `From` for various arrays. `SocketAddr` implements
3067 `From<(I, u16)> where I: Into<IpAddr>`][39372]
3068 * [`format!` estimates the needed capacity before writing a string][39356]
3069 * [Support unprivileged symlink creation in Windows][38921]
3070 * [`PathBuf` implements `Default`][38764]
3071 * [Implement `PartialEq<[A]>` for `VecDeque<A>`][38661]
3072 * [`HashMap` resizes adaptively][38368] to guard against DOS attacks
3073 and poor hash functions.
3078 * [Add `cargo check --all`][cargo/3731]
3079 * [Add an option to ignore SSL revocation checking][cargo/3699]
3080 * [Add `cargo run --package`][cargo/3691]
3081 * [Add `required_features`][cargo/3667]
3082 * [Assume `build.rs` is a build script][cargo/3664]
3083 * [Find workspace via `workspace_root` link in containing member][cargo/3562]
3088 * [Documentation is rendered with mdbook instead of the obsolete, in-tree
3090 * [The "Unstable Book" documents nightly-only features][ubook]
3091 * [Improve the style of the sidebar in rustdoc output][40265]
3092 * [Configure build correctly on 64-bit CPU's with the armhf ABI][40261]
3093 * [Fix MSP430 breakage due to `i128`][40257]
3094 * [Preliminary Solaris/SPARCv9 support][39903]
3095 * [`rustc` is linked statically on Windows MSVC targets][39837], allowing it to
3096 run without installing the MSVC runtime.
3097 * [`rustdoc --test` includes file names in test names][39788]
3098 * This release includes builds of `std` for `sparc64-unknown-linux-gnu`,
3099 `aarch64-unknown-linux-fuchsia`, and `x86_64-unknown-linux-fuchsia`.
3100 * [Initial support for `aarch64-unknown-freebsd`][39491]
3101 * [Initial support for `i686-unknown-netbsd`][39426]
3102 * [This release no longer includes the old makefile build system][39431]. Rust
3103 is built with a custom build system, written in Rust, and with Cargo.
3104 * [Add Debug implementations for libcollection structs][39002]
3105 * [`TypeId` implements `PartialOrd` and `Ord`][38981]
3106 * [`--test-threads=0` produces an error][38945]
3107 * [`rustup` installs documentation by default][40526]
3108 * [The Rust source includes NatVis visualizations][39843]. These can be used by
3109 WinDbg and Visual Studio to improve the debugging experience.
3114 * [Rust 1.17 does not correctly detect the MSVC 2017 linker][38584]. As a
3115 workaround, either use MSVC 2015 or run vcvars.bat.
3116 * [When coercing to an unsized type lifetimes must be equal][40319]. That is,
3117 disallow subtyping between `T` and `U` when `T: Unsize<U>`, e.g. coercing
3118 `&mut [&'a X; N]` to `&mut [&'b X]` requires `'a` be equal to `'b`. Soundness
3120 * [`format!` and `Display::to_string` panic if an underlying formatting
3121 implementation returns an error][40117]. Previously the error was silently
3122 ignored. It is incorrect for `write_fmt` to return an error when writing
3124 * [In-tree crates are verified to be unstable][39851]. Previously, some minor
3125 crates were marked stable and could be accessed from the stable toolchain.
3126 * [Rust git source no longer includes vendored crates][39728]. Those that need
3127 to build with vendored crates should build from release tarballs.
3128 * [Fix inert attributes from `proc_macro_derives`][39572]
3129 * [During crate resolution, rustc prefers a crate in the sysroot if two crates
3130 are otherwise identical][39518]. Unlikely to be encountered outside the Rust
3132 * [Fixed bugs around how type inference interacts with dead-code][39485]. The
3133 existing code generally ignores the type of dead-code unless a type-hint is
3134 provided; this can cause surprising inference interactions particularly around
3135 defaulting. The new code uniformly ignores the result type of dead-code.
3136 * [Tuple-struct constructors with private fields are no longer visible][38932]
3137 * [Lifetime parameters that do not appear in the arguments are now considered
3138 early-bound][38897], resolving a soundness bug (#[32330]). The
3139 `hr_lifetime_in_assoc_type` future-compatibility lint has been in effect since
3141 * [rustdoc: fix doctests with non-feature crate attributes][38161]
3142 * [Make transmuting from fn item types to pointer-sized types a hard
3145 [27787]: https://github.com/rust-lang/rust/issues/27787
3146 [32330]: https://github.com/rust-lang/rust/issues/32330
3147 [34198]: https://github.com/rust-lang/rust/pull/34198
3148 [38161]: https://github.com/rust-lang/rust/pull/38161
3149 [38368]: https://github.com/rust-lang/rust/pull/38368
3150 [38584]: https://github.com/rust-lang/rust/issues/38584
3151 [38661]: https://github.com/rust-lang/rust/pull/38661
3152 [38764]: https://github.com/rust-lang/rust/pull/38764
3153 [38864]: https://github.com/rust-lang/rust/issues/38864
3154 [38897]: https://github.com/rust-lang/rust/pull/38897
3155 [38921]: https://github.com/rust-lang/rust/pull/38921
3156 [38932]: https://github.com/rust-lang/rust/pull/38932
3157 [38945]: https://github.com/rust-lang/rust/pull/38945
3158 [38981]: https://github.com/rust-lang/rust/pull/38981
3159 [39002]: https://github.com/rust-lang/rust/pull/39002
3160 [39116]: https://github.com/rust-lang/rust/pull/39116
3161 [39193]: https://github.com/rust-lang/rust/pull/39193
3162 [39265]: https://github.com/rust-lang/rust/pull/39265
3163 [39356]: https://github.com/rust-lang/rust/pull/39356
3164 [39372]: https://github.com/rust-lang/rust/pull/39372
3165 [39426]: https://github.com/rust-lang/rust/pull/39426
3166 [39431]: https://github.com/rust-lang/rust/pull/39431
3167 [39438]: https://github.com/rust-lang/rust/pull/39438
3168 [39440]: https://github.com/rust-lang/rust/pull/39440
3169 [39485]: https://github.com/rust-lang/rust/pull/39485
3170 [39491]: https://github.com/rust-lang/rust/pull/39491
3171 [39518]: https://github.com/rust-lang/rust/pull/39518
3172 [39538]: https://github.com/rust-lang/rust/pull/39538
3173 [39572]: https://github.com/rust-lang/rust/pull/39572
3174 [39633]: https://github.com/rust-lang/rust/pull/39633
3175 [39642]: https://github.com/rust-lang/rust/pull/39642
3176 [39728]: https://github.com/rust-lang/rust/pull/39728
3177 [39761]: https://github.com/rust-lang/rust/pull/39761
3178 [39788]: https://github.com/rust-lang/rust/pull/39788
3179 [39793]: https://github.com/rust-lang/rust/pull/39793
3180 [39837]: https://github.com/rust-lang/rust/pull/39837
3181 [39843]: https://github.com/rust-lang/rust/pull/39843
3182 [39851]: https://github.com/rust-lang/rust/pull/39851
3183 [39903]: https://github.com/rust-lang/rust/pull/39903
3184 [39939]: https://github.com/rust-lang/rust/pull/39939
3185 [39953]: https://github.com/rust-lang/rust/pull/39953
3186 [39960]: https://github.com/rust-lang/rust/pull/39960
3187 [39990]: https://github.com/rust-lang/rust/pull/39990
3188 [39995]: https://github.com/rust-lang/rust/pull/39995
3189 [40008]: https://github.com/rust-lang/rust/pull/40008
3190 [40009]: https://github.com/rust-lang/rust/pull/40009
3191 [40027]: https://github.com/rust-lang/rust/pull/40027
3192 [40028]: https://github.com/rust-lang/rust/pull/40028
3193 [40037]: https://github.com/rust-lang/rust/pull/40037
3194 [40117]: https://github.com/rust-lang/rust/pull/40117
3195 [40166]: https://github.com/rust-lang/rust/pull/40166
3196 [40245]: https://github.com/rust-lang/rust/pull/40245
3197 [40257]: https://github.com/rust-lang/rust/pull/40257
3198 [40261]: https://github.com/rust-lang/rust/pull/40261
3199 [40265]: https://github.com/rust-lang/rust/pull/40265
3200 [40319]: https://github.com/rust-lang/rust/pull/40319
3201 [40336]: https://github.com/rust-lang/rust/pull/40336
3202 [40526]: https://github.com/rust-lang/rust/pull/40526
3203 [RFC 1623]: https://github.com/rust-lang/rfcs/blob/master/text/1623-static.md
3204 [RFC 1647]: https://github.com/rust-lang/rfcs/blob/master/text/1647-allow-self-in-where-clauses.md
3205 [RFC 1651]: https://github.com/rust-lang/rfcs/blob/master/text/1651-movecell.md
3206 [RFC 1682]: https://github.com/rust-lang/rfcs/blob/master/text/1682-field-init-shorthand.md
3207 [`Arc::from_raw`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.from_raw
3208 [`Arc::into_raw`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.into_raw
3209 [`Arc::ptr_eq`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.ptr_eq
3210 [`BTreeMap::range_mut`]: https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.range_mut
3211 [`BTreeMap::range`]: https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.range
3212 [`Cell::into_inner`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.into_inner
3213 [`Cell::replace`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.replace
3214 [`Cell::swap`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.swap
3215 [`Cell::take`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.take
3216 [`Ordering::then_with`]: https://doc.rust-lang.org/std/cmp/enum.Ordering.html#method.then_with
3217 [`Ordering::then`]: https://doc.rust-lang.org/std/cmp/enum.Ordering.html#method.then
3218 [`Rc::from_raw`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.from_raw
3219 [`Rc::into_raw`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.into_raw
3220 [`Rc::ptr_eq`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.ptr_eq
3221 [`Result::expect_err`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.expect_err
3222 [`collections::Bound`]: https://doc.rust-lang.org/std/collections/enum.Bound.html
3223 [`process::abort`]: https://doc.rust-lang.org/std/process/fn.abort.html
3224 [`ptr::read_unaligned`]: https://doc.rust-lang.org/std/ptr/fn.read_unaligned.html
3225 [`ptr::write_unaligned`]: https://doc.rust-lang.org/std/ptr/fn.write_unaligned.html
3226 [cargo/3562]: https://github.com/rust-lang/cargo/pull/3562
3227 [cargo/3664]: https://github.com/rust-lang/cargo/pull/3664
3228 [cargo/3667]: https://github.com/rust-lang/cargo/pull/3667
3229 [cargo/3691]: https://github.com/rust-lang/cargo/pull/3691
3230 [cargo/3699]: https://github.com/rust-lang/cargo/pull/3699
3231 [cargo/3731]: https://github.com/rust-lang/cargo/pull/3731
3232 [mdbook]: https://crates.io/crates/mdbook
3233 [ubook]: https://doc.rust-lang.org/unstable-book/
3236 Version 1.16.0 (2017-03-16)
3237 ===========================
3242 * [The compiler's `dead_code` lint now accounts for type aliases][38051].
3243 * [Uninhabitable enums (those without any variants) no longer permit wildcard
3244 match patterns][38069]
3245 * [Clean up semantics of `self` in an import list][38313]
3246 * [`Self` may appear in `impl` headers][38920]
3247 * [`Self` may appear in struct expressions][39282]
3252 * [`rustc` now supports `--emit=metadata`, which causes rustc to emit
3253 a `.rmeta` file containing only crate metadata][38571]. This can be
3254 used by tools like the Rust Language Service to perform
3255 metadata-only builds.
3256 * [Levenshtein based typo suggestions now work in most places, while
3257 previously they worked only for fields and sometimes for local
3258 variables][38927]. Together with the overhaul of "no
3259 resolution"/"unexpected resolution" errors (#[38154]) they result in
3260 large and systematic improvement in resolution diagnostics.
3261 * [Fix `transmute::<T, U>` where `T` requires a bigger alignment than
3263 * [rustc: use -Xlinker when specifying an rpath with ',' in it][38798]
3264 * [`rustc` no longer attempts to provide "consider using an explicit
3265 lifetime" suggestions][37057]. They were inaccurate.
3270 * [`VecDeque::truncate`]
3271 * [`VecDeque::resize`]
3272 * [`String::insert_str`]
3273 * [`Duration::checked_add`]
3274 * [`Duration::checked_sub`]
3275 * [`Duration::checked_div`]
3276 * [`Duration::checked_mul`]
3279 * [`SocketAddr::is_ipv4`]
3280 * [`SocketAddr::is_ipv6`]
3281 * [`IpAddr::is_ipv4`]
3282 * [`IpAddr::is_ipv6`]
3284 * [`Vec::dedup_by_key`]
3285 * [`Result::unwrap_or_default`]
3286 * [`<*const T>::wrapping_offset`]
3287 * [`<*mut T>::wrapping_offset`]
3288 * `CommandExt::creation_flags`
3289 * [`File::set_permissions`]
3290 * [`String::split_off`]
3295 * [`[T]::binary_search` and `[T]::binary_search_by_key` now take
3296 their argument by `Borrow` parameter][37761]
3297 * [All public types in std implement `Debug`][38006]
3298 * [`IpAddr` implements `From<Ipv4Addr>` and `From<Ipv6Addr>`][38327]
3299 * [`Ipv6Addr` implements `From<[u16; 8]>`][38131]
3300 * [Ctrl-Z returns from `Stdin.read()` when reading from the console on
3302 * [std: Fix partial writes in `LineWriter`][38062]
3303 * [std: Clamp max read/write sizes on Unix][38062]
3304 * [Use more specific panic message for `&str` slicing errors][38066]
3305 * [`TcpListener::set_only_v6` is deprecated][38304]. This
3306 functionality cannot be achieved in std currently.
3307 * [`writeln!`, like `println!`, now accepts a form with no string
3308 or formatting arguments, to just print a newline][38469]
3309 * [Implement `iter::Sum` and `iter::Product` for `Result`][38580]
3310 * [Reduce the size of static data in `std_unicode::tables`][38781]
3311 * [`char::EscapeDebug`, `EscapeDefault`, `EscapeUnicode`,
3312 `CaseMappingIter`, `ToLowercase`, `ToUppercase`, implement
3314 * [`Duration` implements `Sum`][38712]
3315 * [`String` implements `ToSocketAddrs`][39048]
3320 * [The `cargo check` command does a type check of a project without
3321 building it][cargo/3296]
3322 * [crates.io will display CI badges from Travis and AppVeyor, if
3323 specified in Cargo.toml][cargo/3546]
3324 * [crates.io will display categories listed in Cargo.toml][cargo/3301]
3325 * [Compilation profiles accept integer values for `debug`, in addition
3326 to `true` and `false`. These are passed to `rustc` as the value to
3327 `-C debuginfo`][cargo/3534]
3328 * [Implement `cargo --version --verbose`][cargo/3604]
3329 * [All builds now output 'dep-info' build dependencies compatible with
3330 make and ninja][cargo/3557]
3331 * [Build all workspace members with `build --all`][cargo/3511]
3332 * [Document all workspace members with `doc --all`][cargo/3515]
3333 * [Path deps outside workspace are not members][cargo/3443]
3338 * [`rustdoc` has a `--sysroot` argument that, like `rustc`, specifies
3339 the path to the Rust implementation][38589]
3340 * [The `armv7-linux-androideabi` target no longer enables NEON
3341 extensions, per Google's ABI guide][38413]
3342 * [The stock standard library can be compiled for Redox OS][38401]
3343 * [Rust has initial SPARC support][38726]. Tier 3. No builds
3345 * [Rust has experimental support for Nvidia PTX][38559]. Tier 3. No
3347 * [Fix backtraces on i686-pc-windows-gnu by disabling FPO][39379]
3352 * [Uninhabitable enums (those without any variants) no longer permit wildcard
3353 match patterns][38069]
3354 * In this release, references to uninhabited types can not be
3355 pattern-matched. This was accidentally allowed in 1.15.
3356 * [The compiler's `dead_code` lint now accounts for type aliases][38051].
3357 * [Ctrl-Z returns from `Stdin.read()` when reading from the console on
3359 * [Clean up semantics of `self` in an import list][38313]
3360 * Reimplemented lifetime elision. This change was almost entirely compatible
3361 with existing code, but it did close a number of small bugs and loopholes,
3362 as well as being more accepting in some other [cases][41105].
3364 [37057]: https://github.com/rust-lang/rust/pull/37057
3365 [37761]: https://github.com/rust-lang/rust/pull/37761
3366 [38006]: https://github.com/rust-lang/rust/pull/38006
3367 [38051]: https://github.com/rust-lang/rust/pull/38051
3368 [38062]: https://github.com/rust-lang/rust/pull/38062
3369 [38062]: https://github.com/rust-lang/rust/pull/38622
3370 [38066]: https://github.com/rust-lang/rust/pull/38066
3371 [38069]: https://github.com/rust-lang/rust/pull/38069
3372 [38131]: https://github.com/rust-lang/rust/pull/38131
3373 [38154]: https://github.com/rust-lang/rust/pull/38154
3374 [38274]: https://github.com/rust-lang/rust/pull/38274
3375 [38304]: https://github.com/rust-lang/rust/pull/38304
3376 [38313]: https://github.com/rust-lang/rust/pull/38313
3377 [38314]: https://github.com/rust-lang/rust/pull/38314
3378 [38327]: https://github.com/rust-lang/rust/pull/38327
3379 [38401]: https://github.com/rust-lang/rust/pull/38401
3380 [38413]: https://github.com/rust-lang/rust/pull/38413
3381 [38469]: https://github.com/rust-lang/rust/pull/38469
3382 [38559]: https://github.com/rust-lang/rust/pull/38559
3383 [38571]: https://github.com/rust-lang/rust/pull/38571
3384 [38580]: https://github.com/rust-lang/rust/pull/38580
3385 [38589]: https://github.com/rust-lang/rust/pull/38589
3386 [38670]: https://github.com/rust-lang/rust/pull/38670
3387 [38712]: https://github.com/rust-lang/rust/pull/38712
3388 [38726]: https://github.com/rust-lang/rust/pull/38726
3389 [38781]: https://github.com/rust-lang/rust/pull/38781
3390 [38798]: https://github.com/rust-lang/rust/pull/38798
3391 [38909]: https://github.com/rust-lang/rust/pull/38909
3392 [38920]: https://github.com/rust-lang/rust/pull/38920
3393 [38927]: https://github.com/rust-lang/rust/pull/38927
3394 [39048]: https://github.com/rust-lang/rust/pull/39048
3395 [39282]: https://github.com/rust-lang/rust/pull/39282
3396 [39379]: https://github.com/rust-lang/rust/pull/39379
3397 [41105]: https://github.com/rust-lang/rust/issues/41105
3398 [`<*const T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset
3399 [`<*mut T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset
3400 [`Duration::checked_add`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_add
3401 [`Duration::checked_div`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_div
3402 [`Duration::checked_mul`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_mul
3403 [`Duration::checked_sub`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_sub
3404 [`File::set_permissions`]: https://doc.rust-lang.org/std/fs/struct.File.html#method.set_permissions
3405 [`IpAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv4
3406 [`IpAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv6
3407 [`Result::unwrap_or_default`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.unwrap_or_default
3408 [`SocketAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv4
3409 [`SocketAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv6
3410 [`String::insert_str`]: https://doc.rust-lang.org/std/string/struct.String.html#method.insert_str
3411 [`String::split_off`]: https://doc.rust-lang.org/std/string/struct.String.html#method.split_off
3412 [`Vec::dedup_by_key`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by_key
3413 [`Vec::dedup_by`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by
3414 [`VecDeque::resize`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.resize
3415 [`VecDeque::truncate`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.truncate
3416 [`str::repeat`]: https://doc.rust-lang.org/std/primitive.str.html#method.repeat
3417 [`str::replacen`]: https://doc.rust-lang.org/std/primitive.str.html#method.replacen
3418 [cargo/3296]: https://github.com/rust-lang/cargo/pull/3296
3419 [cargo/3301]: https://github.com/rust-lang/cargo/pull/3301
3420 [cargo/3443]: https://github.com/rust-lang/cargo/pull/3443
3421 [cargo/3511]: https://github.com/rust-lang/cargo/pull/3511
3422 [cargo/3515]: https://github.com/rust-lang/cargo/pull/3515
3423 [cargo/3534]: https://github.com/rust-lang/cargo/pull/3534
3424 [cargo/3546]: https://github.com/rust-lang/cargo/pull/3546
3425 [cargo/3557]: https://github.com/rust-lang/cargo/pull/3557
3426 [cargo/3604]: https://github.com/rust-lang/cargo/pull/3604
3427 [RFC 1623]: https://github.com/rust-lang/rfcs/blob/master/text/1623-static.md
3430 Version 1.15.1 (2017-02-09)
3431 ===========================
3433 * [Fix IntoIter::as_mut_slice's signature][39466]
3434 * [Compile compiler builtins with `-fPIC` on 32-bit platforms][39523]
3436 [39466]: https://github.com/rust-lang/rust/pull/39466
3437 [39523]: https://github.com/rust-lang/rust/pull/39523
3440 Version 1.15.0 (2017-02-02)
3441 ===========================
3446 * Basic procedural macros allowing custom `#[derive]`, aka "macros 1.1", are
3447 stable. This allows popular code-generating crates like Serde and Diesel to
3448 work ergonomically. [RFC 1681].
3449 * [Tuple structs may be empty. Unary and empty tuple structs may be instantiated
3450 with curly braces][36868]. Part of [RFC 1506].
3451 * [A number of minor changes to name resolution have been activated][37127].
3452 They add up to more consistent semantics, allowing for future evolution of
3453 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
3454 details of what is different. The breaking changes here have been transitioned
3455 through the [`legacy_imports`] lint since 1.14, with no known regressions.
3456 * [In `macro_rules`, `path` fragments can now be parsed as type parameter
3458 * [`?Sized` can be used in `where` clauses][37791]
3459 * [There is now a limit on the size of monomorphized types and it can be
3460 modified with the `#![type_size_limit]` crate attribute, similarly to
3461 the `#![recursion_limit]` attribute][37789]
3466 * [On Windows, the compiler will apply dllimport attributes when linking to
3467 extern functions][37973]. Additional attributes and flags can control which
3468 library kind is linked and its name. [RFC 1717].
3469 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
3470 * [The `--test` flag works with procedural macro crates][38107]
3471 * [Fix `extern "aapcs" fn` ABI][37814]
3472 * [The `-C no-stack-check` flag is deprecated][37636]. It does nothing.
3473 * [The `format!` expander recognizes incorrect `printf` and shell-style
3474 formatting directives and suggests the correct format][37613].
3475 * [Only report one error for all unused imports in an import list][37456]
3477 Compiler Performance
3478 --------------------
3480 * [Avoid unnecessary `mk_ty` calls in `Ty::super_fold_with`][37705]
3481 * [Avoid more unnecessary `mk_ty` calls in `Ty::super_fold_with`][37979]
3482 * [Don't clone in `UnificationTable::probe`][37848]
3483 * [Remove `scope_auxiliary` to cut RSS by 10%][37764]
3484 * [Use small vectors in type walker][37760]
3485 * [Macro expansion performance was improved][37701]
3486 * [Change `HirVec<P<T>>` to `HirVec<T>` in `hir::Expr`][37642]
3487 * [Replace FNV with a faster hash function][37229]
3492 * [`std::iter::Iterator::min_by`]
3493 * [`std::iter::Iterator::max_by`]
3494 * [`std::os::*::fs::FileExt`]
3495 * [`std::sync::atomic::Atomic*::get_mut`]
3496 * [`std::sync::atomic::Atomic*::into_inner`]
3497 * [`std::vec::IntoIter::as_slice`]
3498 * [`std::vec::IntoIter::as_mut_slice`]
3499 * [`std::sync::mpsc::Receiver::try_iter`]
3500 * [`std::os::unix::process::CommandExt::before_exec`]
3501 * [`std::rc::Rc::strong_count`]
3502 * [`std::rc::Rc::weak_count`]
3503 * [`std::sync::Arc::strong_count`]
3504 * [`std::sync::Arc::weak_count`]
3505 * [`std::char::encode_utf8`]
3506 * [`std::char::encode_utf16`]
3507 * [`std::cell::Ref::clone`]
3508 * [`std::io::Take::into_inner`]
3513 * [The standard sorting algorithm has been rewritten for dramatic performance
3514 improvements][38192]. It is a hybrid merge sort, drawing influences from
3515 Timsort. Previously it was a naive merge sort.
3516 * [`Iterator::nth` no longer has a `Sized` bound][38134]
3517 * [`Extend<&T>` is specialized for `Vec` where `T: Copy`][38182] to improve
3519 * [`chars().count()` is much faster][37888] and so are [`chars().last()`
3520 and `char_indices().last()`][37882]
3521 * [Fix ARM Objective-C ABI in `std::env::args`][38146]
3522 * [Chinese characters display correctly in `fmt::Debug`][37855]
3523 * [Derive `Default` for `Duration`][37699]
3524 * [Support creation of anonymous pipes on WinXP/2k][37677]
3525 * [`mpsc::RecvTimeoutError` implements `Error`][37527]
3526 * [Don't pass overlapped handles to processes][38835]
3531 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
3532 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
3533 should instead check the variable at runtime with `std::env`. That the value
3534 was set at build time was a bug, and incorrect when cross-compiling. This
3535 change is known to cause breakage.
3536 * [Add `--all` flag to `cargo test`][cargo/3221]
3537 * [Compile statically against the MSVC CRT][cargo/3363]
3538 * [Mix feature flags into fingerprint/metadata shorthash][cargo/3102]
3539 * [Link OpenSSL statically on OSX][cargo/3311]
3540 * [Apply new fingerprinting to build dir outputs][cargo/3310]
3541 * [Test for bad path overrides with summaries][cargo/3336]
3542 * [Require `cargo install --vers` to take a semver version][cargo/3338]
3543 * [Fix retrying crate downloads for network errors][cargo/3348]
3544 * [Implement string lookup for `build.rustflags` config key][cargo/3356]
3545 * [Emit more info on --message-format=json][cargo/3319]
3546 * [Assume `build.rs` in the same directory as `Cargo.toml` is a build script][cargo/3361]
3547 * [Don't ignore errors in workspace manifest][cargo/3409]
3548 * [Fix `--message-format JSON` when rustc emits non-JSON warnings][cargo/3410]
3553 * [Test runners (binaries built with `--test`) now support a `--list` argument
3554 that lists the tests it contains][38185]
3555 * [Test runners now support a `--exact` argument that makes the test filter
3556 match exactly, instead of matching only a substring of the test name][38181]
3557 * [rustdoc supports a `--playground-url` flag][37763]
3558 * [rustdoc provides more details about `#[should_panic]` errors][37749]
3563 * [The Rust build system is now written in Rust][37817]. The Makefiles may
3564 continue to be used in this release by passing `--disable-rustbuild` to the
3565 configure script, but they will be deleted soon. Note that the new build
3566 system uses a different on-disk layout that will likely affect any scripts
3568 * [Rust supports i686-unknown-openbsd][38086]. Tier 3 support. No testing or
3570 * [Rust supports the MSP430][37627]. Tier 3 support. No testing or releases.
3571 * [Rust supports the ARMv5TE architecture][37615]. Tier 3 support. No testing or
3577 * [A number of minor changes to name resolution have been activated][37127].
3578 They add up to more consistent semantics, allowing for future evolution of
3579 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
3580 details of what is different. The breaking changes here have been transitioned
3581 through the [`legacy_imports`] lint since 1.14, with no known regressions.
3582 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
3583 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
3584 should instead check the variable at runtime with `std::env`. That the value
3585 was set at build time was a bug, and incorrect when cross-compiling. This
3586 change is known to cause breakage.
3587 * [Higher-ranked lifetimes are no longer allowed to appear _only_ in associated
3588 types][33685]. The [`hr_lifetime_in_assoc_type` lint] has been a warning since
3589 1.10 and is now an error by default. It will become a hard error in the near
3591 * [The semantics relating modules to file system directories are changing in
3592 minor ways][37602]. This is captured in the new `legacy_directory_ownership`
3593 lint, which is a warning in this release, and will become a hard error in the
3595 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
3596 * [Once `Peekable` peeks a `None` it will return that `None` without re-querying
3597 the underlying iterator][37834]
3599 ["changes"]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md#changes-to-name-resolution-rules
3600 [33685]: https://github.com/rust-lang/rust/issues/33685
3601 [36868]: https://github.com/rust-lang/rust/pull/36868
3602 [37127]: https://github.com/rust-lang/rust/pull/37127
3603 [37229]: https://github.com/rust-lang/rust/pull/37229
3604 [37456]: https://github.com/rust-lang/rust/pull/37456
3605 [37527]: https://github.com/rust-lang/rust/pull/37527
3606 [37602]: https://github.com/rust-lang/rust/pull/37602
3607 [37613]: https://github.com/rust-lang/rust/pull/37613
3608 [37615]: https://github.com/rust-lang/rust/pull/37615
3609 [37636]: https://github.com/rust-lang/rust/pull/37636
3610 [37627]: https://github.com/rust-lang/rust/pull/37627
3611 [37642]: https://github.com/rust-lang/rust/pull/37642
3612 [37677]: https://github.com/rust-lang/rust/pull/37677
3613 [37699]: https://github.com/rust-lang/rust/pull/37699
3614 [37701]: https://github.com/rust-lang/rust/pull/37701
3615 [37705]: https://github.com/rust-lang/rust/pull/37705
3616 [37749]: https://github.com/rust-lang/rust/pull/37749
3617 [37760]: https://github.com/rust-lang/rust/pull/37760
3618 [37763]: https://github.com/rust-lang/rust/pull/37763
3619 [37764]: https://github.com/rust-lang/rust/pull/37764
3620 [37789]: https://github.com/rust-lang/rust/pull/37789
3621 [37791]: https://github.com/rust-lang/rust/pull/37791
3622 [37814]: https://github.com/rust-lang/rust/pull/37814
3623 [37817]: https://github.com/rust-lang/rust/pull/37817
3624 [37834]: https://github.com/rust-lang/rust/pull/37834
3625 [37848]: https://github.com/rust-lang/rust/pull/37848
3626 [37855]: https://github.com/rust-lang/rust/pull/37855
3627 [37882]: https://github.com/rust-lang/rust/pull/37882
3628 [37888]: https://github.com/rust-lang/rust/pull/37888
3629 [37973]: https://github.com/rust-lang/rust/pull/37973
3630 [37979]: https://github.com/rust-lang/rust/pull/37979
3631 [38086]: https://github.com/rust-lang/rust/pull/38086
3632 [38107]: https://github.com/rust-lang/rust/pull/38107
3633 [38117]: https://github.com/rust-lang/rust/pull/38117
3634 [38134]: https://github.com/rust-lang/rust/pull/38134
3635 [38146]: https://github.com/rust-lang/rust/pull/38146
3636 [38181]: https://github.com/rust-lang/rust/pull/38181
3637 [38182]: https://github.com/rust-lang/rust/pull/38182
3638 [38185]: https://github.com/rust-lang/rust/pull/38185
3639 [38192]: https://github.com/rust-lang/rust/pull/38192
3640 [38279]: https://github.com/rust-lang/rust/pull/38279
3641 [38835]: https://github.com/rust-lang/rust/pull/38835
3642 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
3643 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
3644 [RFC 1560]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md
3645 [RFC 1681]: https://github.com/rust-lang/rfcs/blob/master/text/1681-macros-1.1.md
3646 [RFC 1717]: https://github.com/rust-lang/rfcs/blob/master/text/1717-dllimport.md
3647 [`hr_lifetime_in_assoc_type` lint]: https://github.com/rust-lang/rust/issues/33685
3648 [`legacy_imports`]: https://github.com/rust-lang/rust/pull/38271
3649 [cargo/3102]: https://github.com/rust-lang/cargo/pull/3102
3650 [cargo/3221]: https://github.com/rust-lang/cargo/pull/3221
3651 [cargo/3310]: https://github.com/rust-lang/cargo/pull/3310
3652 [cargo/3311]: https://github.com/rust-lang/cargo/pull/3311
3653 [cargo/3319]: https://github.com/rust-lang/cargo/pull/3319
3654 [cargo/3336]: https://github.com/rust-lang/cargo/pull/3336
3655 [cargo/3338]: https://github.com/rust-lang/cargo/pull/3338
3656 [cargo/3348]: https://github.com/rust-lang/cargo/pull/3348
3657 [cargo/3356]: https://github.com/rust-lang/cargo/pull/3356
3658 [cargo/3361]: https://github.com/rust-lang/cargo/pull/3361
3659 [cargo/3363]: https://github.com/rust-lang/cargo/pull/3363
3660 [cargo/3368]: https://github.com/rust-lang/cargo/issues/3368
3661 [cargo/3409]: https://github.com/rust-lang/cargo/pull/3409
3662 [cargo/3410]: https://github.com/rust-lang/cargo/pull/3410
3663 [`std::iter::Iterator::min_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.min_by
3664 [`std::iter::Iterator::max_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.max_by
3665 [`std::os::*::fs::FileExt`]: https://doc.rust-lang.org/std/os/unix/fs/trait.FileExt.html
3666 [`std::sync::atomic::Atomic*::get_mut`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.get_mut
3667 [`std::sync::atomic::Atomic*::into_inner`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.into_inner
3668 [`std::vec::IntoIter::as_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_slice
3669 [`std::vec::IntoIter::as_mut_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_mut_slice
3670 [`std::sync::mpsc::Receiver::try_iter`]: https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.try_iter
3671 [`std::os::unix::process::CommandExt::before_exec`]: https://doc.rust-lang.org/std/os/unix/process/trait.CommandExt.html#tymethod.before_exec
3672 [`std::rc::Rc::strong_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.strong_count
3673 [`std::rc::Rc::weak_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.weak_count
3674 [`std::sync::Arc::strong_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.strong_count
3675 [`std::sync::Arc::weak_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.weak_count
3676 [`std::char::encode_utf8`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf8
3677 [`std::char::encode_utf16`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf16
3678 [`std::cell::Ref::clone`]: https://doc.rust-lang.org/std/cell/struct.Ref.html#method.clone
3679 [`std::io::Take::into_inner`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.into_inner
3682 Version 1.14.0 (2016-12-22)
3683 ===========================
3688 * [`..` matches multiple tuple fields in enum variants, structs
3689 and tuples][36843]. [RFC 1492].
3690 * [Safe `fn` items can be coerced to `unsafe fn` pointers][37389]
3691 * [`use *` and `use ::*` both glob-import from the crate root][37367]
3692 * [It's now possible to call a `Vec<Box<Fn()>>` without explicit
3693 dereferencing][36822]
3698 * [Mark enums with non-zero discriminant as non-zero][37224]
3699 * [Lower-case `static mut` names are linted like other
3700 statics and consts][37162]
3701 * [Fix ICE on some macros in const integer positions
3702 (e.g. `[u8; m!()]`)][36819]
3703 * [Improve error message and snippet for "did you mean `x`"][36798]
3704 * [Add a panic-strategy field to the target specification][36794]
3705 * [Include LLVM version in `--version --verbose`][37200]
3707 Compile-time Optimizations
3708 --------------------------
3710 * [Improve macro expansion performance][37569]
3711 * [Shrink `Expr_::ExprInlineAsm`][37445]
3712 * [Replace all uses of SHA-256 with BLAKE2b][37439]
3713 * [Reduce the number of bytes hashed by `IchHasher`][37427]
3714 * [Avoid more allocations when compiling html5ever][37373]
3715 * [Use `SmallVector` in `CombineFields::instantiate`][37322]
3716 * [Avoid some allocations in the macro parser][37318]
3717 * [Use a faster deflate setting][37298]
3718 * [Add `ArrayVec` and `AccumulateVec` to reduce heap allocations
3719 during interning of slices][37270]
3720 * [Optimize `write_metadata`][37267]
3721 * [Don't process obligation forest cycles when stalled][37231]
3722 * [Avoid many `CrateConfig` clones][37161]
3723 * [Optimize `Substs::super_fold_with`][37108]
3724 * [Optimize `ObligationForest`'s `NodeState` handling][36993]
3725 * [Speed up `plug_leaks`][36917]
3730 * [`println!()`, with no arguments, prints newline][36825].
3731 Previously, an empty string was required to achieve the same.
3732 * [`Wrapping` impls standard binary and unary operators, as well as
3733 the `Sum` and `Product` iterators][37356]
3734 * [Implement `From<Cow<str>> for String` and `From<Cow<[T]>> for
3736 * [Improve `fold` performance for `chain`, `cloned`, `map`, and
3737 `VecDeque` iterators][37315]
3738 * [Improve `SipHasher` performance on small values][37312]
3739 * [Add Iterator trait TrustedLen to enable better FromIterator /
3741 * [Expand `.zip()` specialization to `.map()` and `.cloned()`][37230]
3742 * [`ReadDir` implements `Debug`][37221]
3743 * [Implement `RefUnwindSafe` for atomic types][37178]
3744 * [Specialize `Vec::extend` to `Vec::extend_from_slice`][37094]
3745 * [Avoid allocations in `Decoder::read_str`][37064]
3746 * [`io::Error` implements `From<io::ErrorKind>`][37037]
3747 * [Impl `Debug` for raw pointers to unsized data][36880]
3748 * [Don't reuse `HashMap` random seeds][37470]
3749 * [The internal memory layout of `HashMap` is more cache-friendly, for
3750 significant improvements in some operations][36692]
3751 * [`HashMap` uses less memory on 32-bit architectures][36595]
3752 * [Impl `Add<{str, Cow<str>}>` for `Cow<str>`][36430]
3757 * [Expose rustc cfg values to build scripts][cargo/3243]
3758 * [Allow cargo to work with read-only `CARGO_HOME`][cargo/3259]
3759 * [Fix passing --features when testing multiple packages][cargo/3280]
3760 * [Use a single profile set per workspace][cargo/3249]
3761 * [Load `replace` sections from lock files][cargo/3220]
3762 * [Ignore `panic` configuration for test/bench profiles][cargo/3175]
3767 * [rustup is the recommended Rust installation method][1.14rustup]
3768 * This release includes host (rustc) builds for Linux on MIPS, PowerPC, and
3769 S390x. These are [tier 2] platforms and may have major defects. Follow the
3770 instructions on the website to install, or add the targets to an existing
3771 installation with `rustup target add`. The new target triples are:
3772 - `mips-unknown-linux-gnu`
3773 - `mipsel-unknown-linux-gnu`
3774 - `mips64-unknown-linux-gnuabi64`
3775 - `mips64el-unknown-linux-gnuabi64 `
3776 - `powerpc-unknown-linux-gnu`
3777 - `powerpc64-unknown-linux-gnu`
3778 - `powerpc64le-unknown-linux-gnu`
3779 - `s390x-unknown-linux-gnu `
3780 * This release includes target (std) builds for ARM Linux running MUSL
3781 libc. These are [tier 2] platforms and may have major defects. Add the
3782 following triples to an existing rustup installation with `rustup target add`:
3783 - `arm-unknown-linux-musleabi`
3784 - `arm-unknown-linux-musleabihf`
3785 - `armv7-unknown-linux-musleabihf`
3786 * This release includes [experimental support for WebAssembly][1.14wasm], via
3787 the `wasm32-unknown-emscripten` target. This target is known to have major
3788 defects. Please test, report, and fix.
3789 * rustup no longer installs documentation by default. Run `rustup
3790 component add rust-docs` to install.
3791 * [Fix line stepping in debugger][37310]
3792 * [Enable line number debuginfo in releases][37280]
3797 * [Disable jemalloc on aarch64/powerpc/mips][37392]
3798 * [Add support for Fuchsia OS][37313]
3799 * [Detect local-rebuild by only MAJOR.MINOR version][37273]
3804 * [A number of forward-compatibility lints used by the compiler
3805 to gradually introduce language changes have been converted
3806 to deny by default][36894]:
3807 - ["use of inaccessible extern crate erroneously allowed"][36886]
3808 - ["type parameter default erroneously allowed in invalid location"][36887]
3809 - ["detects super or self keywords at the beginning of global path"][36888]
3810 - ["two overlapping inherent impls define an item with the same name
3811 were erroneously allowed"][36889]
3812 - ["floating-point constants cannot be used in patterns"][36890]
3813 - ["constants of struct or enum type can only be used in a pattern if
3814 the struct or enum has `#[derive(PartialEq, Eq)]`"][36891]
3815 - ["lifetimes or labels named `'_` were erroneously allowed"][36892]
3816 * [Prohibit patterns in trait methods without bodies][37378]
3817 * [The atomic `Ordering` enum may not be matched exhaustively][37351]
3818 * [Future-proofing `#[no_link]` breaks some obscure cases][37247]
3819 * [The `$crate` macro variable is accepted in fewer locations][37213]
3820 * [Impls specifying extra region requirements beyond the trait
3821 they implement are rejected][37167]
3822 * [Enums may not be unsized][37111]. Unsized enums are intended to
3823 work but never have. For now they are forbidden.
3824 * [Enforce the shadowing restrictions from RFC 1560 for today's macros][36767]
3826 [tier 2]: https://forge.rust-lang.org/platform-support.html
3827 [1.14rustup]: https://internals.rust-lang.org/t/beta-testing-rustup-rs/3316/204
3828 [1.14wasm]: https://users.rust-lang.org/t/compiling-to-the-web-with-rust-and-emscripten/7627
3829 [36430]: https://github.com/rust-lang/rust/pull/36430
3830 [36595]: https://github.com/rust-lang/rust/pull/36595
3831 [36595]: https://github.com/rust-lang/rust/pull/36595
3832 [36692]: https://github.com/rust-lang/rust/pull/36692
3833 [36767]: https://github.com/rust-lang/rust/pull/36767
3834 [36794]: https://github.com/rust-lang/rust/pull/36794
3835 [36798]: https://github.com/rust-lang/rust/pull/36798
3836 [36819]: https://github.com/rust-lang/rust/pull/36819
3837 [36822]: https://github.com/rust-lang/rust/pull/36822
3838 [36825]: https://github.com/rust-lang/rust/pull/36825
3839 [36843]: https://github.com/rust-lang/rust/pull/36843
3840 [36880]: https://github.com/rust-lang/rust/pull/36880
3841 [36886]: https://github.com/rust-lang/rust/issues/36886
3842 [36887]: https://github.com/rust-lang/rust/issues/36887
3843 [36888]: https://github.com/rust-lang/rust/issues/36888
3844 [36889]: https://github.com/rust-lang/rust/issues/36889
3845 [36890]: https://github.com/rust-lang/rust/issues/36890
3846 [36891]: https://github.com/rust-lang/rust/issues/36891
3847 [36892]: https://github.com/rust-lang/rust/issues/36892
3848 [36894]: https://github.com/rust-lang/rust/pull/36894
3849 [36917]: https://github.com/rust-lang/rust/pull/36917
3850 [36993]: https://github.com/rust-lang/rust/pull/36993
3851 [37037]: https://github.com/rust-lang/rust/pull/37037
3852 [37064]: https://github.com/rust-lang/rust/pull/37064
3853 [37094]: https://github.com/rust-lang/rust/pull/37094
3854 [37108]: https://github.com/rust-lang/rust/pull/37108
3855 [37111]: https://github.com/rust-lang/rust/pull/37111
3856 [37161]: https://github.com/rust-lang/rust/pull/37161
3857 [37162]: https://github.com/rust-lang/rust/pull/37162
3858 [37167]: https://github.com/rust-lang/rust/pull/37167
3859 [37178]: https://github.com/rust-lang/rust/pull/37178
3860 [37200]: https://github.com/rust-lang/rust/pull/37200
3861 [37213]: https://github.com/rust-lang/rust/pull/37213
3862 [37221]: https://github.com/rust-lang/rust/pull/37221
3863 [37224]: https://github.com/rust-lang/rust/pull/37224
3864 [37230]: https://github.com/rust-lang/rust/pull/37230
3865 [37231]: https://github.com/rust-lang/rust/pull/37231
3866 [37247]: https://github.com/rust-lang/rust/pull/37247
3867 [37267]: https://github.com/rust-lang/rust/pull/37267
3868 [37270]: https://github.com/rust-lang/rust/pull/37270
3869 [37273]: https://github.com/rust-lang/rust/pull/37273
3870 [37280]: https://github.com/rust-lang/rust/pull/37280
3871 [37298]: https://github.com/rust-lang/rust/pull/37298
3872 [37306]: https://github.com/rust-lang/rust/pull/37306
3873 [37310]: https://github.com/rust-lang/rust/pull/37310
3874 [37312]: https://github.com/rust-lang/rust/pull/37312
3875 [37313]: https://github.com/rust-lang/rust/pull/37313
3876 [37315]: https://github.com/rust-lang/rust/pull/37315
3877 [37318]: https://github.com/rust-lang/rust/pull/37318
3878 [37322]: https://github.com/rust-lang/rust/pull/37322
3879 [37326]: https://github.com/rust-lang/rust/pull/37326
3880 [37351]: https://github.com/rust-lang/rust/pull/37351
3881 [37356]: https://github.com/rust-lang/rust/pull/37356
3882 [37367]: https://github.com/rust-lang/rust/pull/37367
3883 [37373]: https://github.com/rust-lang/rust/pull/37373
3884 [37378]: https://github.com/rust-lang/rust/pull/37378
3885 [37389]: https://github.com/rust-lang/rust/pull/37389
3886 [37392]: https://github.com/rust-lang/rust/pull/37392
3887 [37427]: https://github.com/rust-lang/rust/pull/37427
3888 [37439]: https://github.com/rust-lang/rust/pull/37439
3889 [37445]: https://github.com/rust-lang/rust/pull/37445
3890 [37470]: https://github.com/rust-lang/rust/pull/37470
3891 [37569]: https://github.com/rust-lang/rust/pull/37569
3892 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
3893 [cargo/3175]: https://github.com/rust-lang/cargo/pull/3175
3894 [cargo/3220]: https://github.com/rust-lang/cargo/pull/3220
3895 [cargo/3243]: https://github.com/rust-lang/cargo/pull/3243
3896 [cargo/3249]: https://github.com/rust-lang/cargo/pull/3249
3897 [cargo/3259]: https://github.com/rust-lang/cargo/pull/3259
3898 [cargo/3280]: https://github.com/rust-lang/cargo/pull/3280
3901 Version 1.13.0 (2016-11-10)
3902 ===========================
3907 * [Stabilize the `?` operator][36995]. `?` is a simple way to propagate
3908 errors, like the `try!` macro, described in [RFC 0243].
3909 * [Stabilize macros in type position][36014]. Described in [RFC 873].
3910 * [Stabilize attributes on statements][36995]. Described in [RFC 0016].
3911 * [Fix `#[derive]` for empty tuple structs/variants][35728]
3912 * [Fix lifetime rules for 'if' conditions][36029]
3913 * [Avoid loading and parsing unconfigured non-inline modules][36482]
3918 * [Add the `-C link-arg` argument][36574]
3919 * [Remove the old AST-based backend from rustc_trans][35764]
3920 * [Don't enable NEON by default on armv7 Linux][35814]
3921 * [Fix debug line number info for macro expansions][35238]
3922 * [Do not emit "class method" debuginfo for types that are not
3923 DICompositeType][36008]
3924 * [Warn about multiple conflicting #[repr] hints][34623]
3925 * [When sizing DST, don't double-count nested struct prefixes][36351]
3926 * [Default RUST_MIN_STACK to 16MiB for now][36505]
3927 * [Improve rlib metadata format][36551]. Reduces rlib size significantly.
3928 * [Reject macros with empty repetitions to avoid infinite loop][36721]
3929 * [Expand macros without recursing to avoid stack overflows][36214]
3934 * [Replace macro backtraces with labeled local uses][35702]
3935 * [Improve error message for misplaced doc comments][33922]
3936 * [Buffer unix and lock windows to prevent message interleaving][35975]
3937 * [Update lifetime errors to specifically note temporaries][36171]
3938 * [Special case a few colors for Windows][36178]
3939 * [Suggest `use self` when such an import resolves][36289]
3940 * [Be more specific when type parameter shadows primitive type][36338]
3941 * Many minor improvements
3943 Compile-time Optimizations
3944 --------------------------
3946 * [Compute and cache HIR hashes at beginning][35854]
3947 * [Don't hash types in loan paths][36004]
3948 * [Cache projections in trans][35761]
3949 * [Optimize the parser's last token handling][36527]
3950 * [Only instantiate #[inline] functions in codegen units referencing
3951 them][36524]. This leads to big improvements in cases where crates export
3952 define many inline functions without using them directly.
3953 * [Lazily allocate TypedArena's first chunk][36592]
3954 * [Don't allocate during default HashSet creation][36734]
3961 * [`overflowing_abs`]
3962 * [`RefCell::try_borrow`]
3963 * [`RefCell::try_borrow_mut`]
3968 * [Add `assert_ne!` and `debug_assert_ne!`][35074]
3969 * [Make `vec_deque::Drain`, `hash_map::Drain`, and `hash_set::Drain`
3971 * [Implement `AsRef<[T]>` for `std::slice::Iter`][35559]
3972 * [Implement `Debug` for `std::vec::IntoIter`][35707]
3973 * [`CString`: avoid excessive growth just to 0-terminate][35871]
3974 * [Implement `CoerceUnsized` for `{Cell, RefCell, UnsafeCell}`][35627]
3975 * [Use arc4rand on FreeBSD][35884]
3976 * [memrchr: Correct aligned offset computation][35969]
3977 * [Improve Demangling of Rust Symbols][36059]
3978 * [Use monotonic time in condition variables][35048]
3979 * [Implement `Debug` for `std::path::{Components,Iter}`][36101]
3980 * [Implement conversion traits for `char`][35755]
3981 * [Fix illegal instruction caused by overflow in channel cloning][36104]
3982 * [Zero first byte of CString on drop][36264]
3983 * [Inherit overflow checks for sum and product][36372]
3984 * [Add missing Eq implementations][36423]
3985 * [Implement `Debug` for `DirEntry`][36631]
3986 * [When `getaddrinfo` returns `EAI_SYSTEM` retrieve actual error from
3988 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
3989 * [Implement more traits for `std::io::ErrorKind`][35911]
3990 * [Optimize BinaryHeap bounds checking][36072]
3991 * [Work around pointer aliasing issue in `Vec::extend_from_slice`,
3992 `extend_with_element`][36355]
3993 * [Fix overflow checking in unsigned pow()][34942]
3998 * This release includes security fixes to both curl and OpenSSL.
3999 * [Fix transitive doctests when panic=abort][cargo/3021]
4000 * [Add --all-features flag to cargo][cargo/3038]
4001 * [Reject path-based dependencies in `cargo package`][cargo/3060]
4002 * [Don't parse the home directory more than once][cargo/3078]
4003 * [Don't try to generate Cargo.lock on empty workspaces][cargo/3092]
4004 * [Update OpenSSL to 1.0.2j][cargo/3121]
4005 * [Add license and license_file to cargo metadata output][cargo/3110]
4006 * [Make crates-io registry URL optional in config; ignore all changes to
4007 source.crates-io][cargo/3089]
4008 * [Don't download dependencies from other platforms][cargo/3123]
4009 * [Build transitive dev-dependencies when needed][cargo/3125]
4010 * [Add support for per-target rustflags in .cargo/config][cargo/3157]
4011 * [Avoid updating registry when adding existing deps][cargo/3144]
4012 * [Warn about path overrides that won't work][cargo/3136]
4013 * [Use workspaces during `cargo install`][cargo/3146]
4014 * [Leak mspdbsrv.exe processes on Windows][cargo/3162]
4015 * [Add --message-format flag][cargo/3000]
4016 * [Pass target environment for rustdoc][cargo/3205]
4017 * [Use `CommandExt::exec` for `cargo run` on Unix][cargo/2818]
4018 * [Update curl and curl-sys][cargo/3241]
4019 * [Call rustdoc test with the correct cfg flags of a package][cargo/3242]
4024 * [rustdoc: Add the `--sysroot` argument][36586]
4025 * [rustdoc: Fix a couple of issues with the search results][35655]
4026 * [rustdoc: remove the `!` from macro URLs and titles][35234]
4027 * [gdb: Fix pretty-printing special-cased Rust types][35585]
4028 * [rustdoc: Filter more incorrect methods inherited through Deref][36266]
4033 * [Remove unmaintained style guide][35124]
4034 * [Add s390x support][36369]
4035 * [Initial work at Haiku OS support][36727]
4036 * [Add mips-uclibc targets][35734]
4037 * [Crate-ify compiler-rt into compiler-builtins][35021]
4038 * [Add rustc version info (git hash + date) to dist tarball][36213]
4039 * Many documentation improvements
4044 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
4045 * [Deny (by default) transmuting from fn item types to pointer-sized
4046 types][34923]. Continuing the long transition to zero-sized fn items,
4048 * [Fix `#[derive]` for empty tuple structs/variants][35728].
4050 * [Issue deprecation warnings for safe accesses to extern statics][36173]
4051 * [Fix lifetime rules for 'if' conditions][36029].
4052 * [Inherit overflow checks for sum and product][36372].
4053 * [Forbid user-defined macros named "macro_rules"][36730].
4055 [33922]: https://github.com/rust-lang/rust/pull/33922
4056 [34623]: https://github.com/rust-lang/rust/pull/34623
4057 [34923]: https://github.com/rust-lang/rust/pull/34923
4058 [34942]: https://github.com/rust-lang/rust/pull/34942
4059 [34982]: https://github.com/rust-lang/rust/pull/34982
4060 [35021]: https://github.com/rust-lang/rust/pull/35021
4061 [35048]: https://github.com/rust-lang/rust/pull/35048
4062 [35074]: https://github.com/rust-lang/rust/pull/35074
4063 [35124]: https://github.com/rust-lang/rust/pull/35124
4064 [35234]: https://github.com/rust-lang/rust/pull/35234
4065 [35238]: https://github.com/rust-lang/rust/pull/35238
4066 [35354]: https://github.com/rust-lang/rust/pull/35354
4067 [35559]: https://github.com/rust-lang/rust/pull/35559
4068 [35585]: https://github.com/rust-lang/rust/pull/35585
4069 [35627]: https://github.com/rust-lang/rust/pull/35627
4070 [35655]: https://github.com/rust-lang/rust/pull/35655
4071 [35702]: https://github.com/rust-lang/rust/pull/35702
4072 [35707]: https://github.com/rust-lang/rust/pull/35707
4073 [35728]: https://github.com/rust-lang/rust/pull/35728
4074 [35734]: https://github.com/rust-lang/rust/pull/35734
4075 [35755]: https://github.com/rust-lang/rust/pull/35755
4076 [35761]: https://github.com/rust-lang/rust/pull/35761
4077 [35764]: https://github.com/rust-lang/rust/pull/35764
4078 [35814]: https://github.com/rust-lang/rust/pull/35814
4079 [35854]: https://github.com/rust-lang/rust/pull/35854
4080 [35871]: https://github.com/rust-lang/rust/pull/35871
4081 [35884]: https://github.com/rust-lang/rust/pull/35884
4082 [35911]: https://github.com/rust-lang/rust/pull/35911
4083 [35969]: https://github.com/rust-lang/rust/pull/35969
4084 [35975]: https://github.com/rust-lang/rust/pull/35975
4085 [36004]: https://github.com/rust-lang/rust/pull/36004
4086 [36008]: https://github.com/rust-lang/rust/pull/36008
4087 [36014]: https://github.com/rust-lang/rust/pull/36014
4088 [36029]: https://github.com/rust-lang/rust/pull/36029
4089 [36059]: https://github.com/rust-lang/rust/pull/36059
4090 [36072]: https://github.com/rust-lang/rust/pull/36072
4091 [36101]: https://github.com/rust-lang/rust/pull/36101
4092 [36104]: https://github.com/rust-lang/rust/pull/36104
4093 [36171]: https://github.com/rust-lang/rust/pull/36171
4094 [36173]: https://github.com/rust-lang/rust/pull/36173
4095 [36178]: https://github.com/rust-lang/rust/pull/36178
4096 [36213]: https://github.com/rust-lang/rust/pull/36213
4097 [36214]: https://github.com/rust-lang/rust/pull/36214
4098 [36264]: https://github.com/rust-lang/rust/pull/36264
4099 [36266]: https://github.com/rust-lang/rust/pull/36266
4100 [36289]: https://github.com/rust-lang/rust/pull/36289
4101 [36338]: https://github.com/rust-lang/rust/pull/36338
4102 [36351]: https://github.com/rust-lang/rust/pull/36351
4103 [36355]: https://github.com/rust-lang/rust/pull/36355
4104 [36369]: https://github.com/rust-lang/rust/pull/36369
4105 [36372]: https://github.com/rust-lang/rust/pull/36372
4106 [36423]: https://github.com/rust-lang/rust/pull/36423
4107 [36482]: https://github.com/rust-lang/rust/pull/36482
4108 [36505]: https://github.com/rust-lang/rust/pull/36505
4109 [36524]: https://github.com/rust-lang/rust/pull/36524
4110 [36527]: https://github.com/rust-lang/rust/pull/36527
4111 [36551]: https://github.com/rust-lang/rust/pull/36551
4112 [36574]: https://github.com/rust-lang/rust/pull/36574
4113 [36586]: https://github.com/rust-lang/rust/pull/36586
4114 [36592]: https://github.com/rust-lang/rust/pull/36592
4115 [36631]: https://github.com/rust-lang/rust/pull/36631
4116 [36639]: https://github.com/rust-lang/rust/pull/36639
4117 [36721]: https://github.com/rust-lang/rust/pull/36721
4118 [36727]: https://github.com/rust-lang/rust/pull/36727
4119 [36730]: https://github.com/rust-lang/rust/pull/36730
4120 [36734]: https://github.com/rust-lang/rust/pull/36734
4121 [36754]: https://github.com/rust-lang/rust/pull/36754
4122 [36995]: https://github.com/rust-lang/rust/pull/36995
4123 [RFC 0016]: https://github.com/rust-lang/rfcs/blob/master/text/0016-more-attributes.md
4124 [RFC 0243]: https://github.com/rust-lang/rfcs/blob/master/text/0243-trait-based-exception-handling.md
4125 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
4126 [RFC 401]: https://github.com/rust-lang/rfcs/blob/master/text/0401-coercions.md
4127 [RFC 873]: https://github.com/rust-lang/rfcs/blob/master/text/0873-type-macros.md
4128 [cargo/2818]: https://github.com/rust-lang/cargo/pull/2818
4129 [cargo/3000]: https://github.com/rust-lang/cargo/pull/3000
4130 [cargo/3021]: https://github.com/rust-lang/cargo/pull/3021
4131 [cargo/3038]: https://github.com/rust-lang/cargo/pull/3038
4132 [cargo/3060]: https://github.com/rust-lang/cargo/pull/3060
4133 [cargo/3078]: https://github.com/rust-lang/cargo/pull/3078
4134 [cargo/3089]: https://github.com/rust-lang/cargo/pull/3089
4135 [cargo/3092]: https://github.com/rust-lang/cargo/pull/3092
4136 [cargo/3110]: https://github.com/rust-lang/cargo/pull/3110
4137 [cargo/3121]: https://github.com/rust-lang/cargo/pull/3121
4138 [cargo/3123]: https://github.com/rust-lang/cargo/pull/3123
4139 [cargo/3125]: https://github.com/rust-lang/cargo/pull/3125
4140 [cargo/3136]: https://github.com/rust-lang/cargo/pull/3136
4141 [cargo/3144]: https://github.com/rust-lang/cargo/pull/3144
4142 [cargo/3146]: https://github.com/rust-lang/cargo/pull/3146
4143 [cargo/3157]: https://github.com/rust-lang/cargo/pull/3157
4144 [cargo/3162]: https://github.com/rust-lang/cargo/pull/3162
4145 [cargo/3205]: https://github.com/rust-lang/cargo/pull/3205
4146 [cargo/3241]: https://github.com/rust-lang/cargo/pull/3241
4147 [cargo/3242]: https://github.com/rust-lang/cargo/pull/3242
4148 [rustup]: https://www.rustup.rs
4149 [`checked_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.checked_abs
4150 [`wrapping_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.wrapping_abs
4151 [`overflowing_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.overflowing_abs
4152 [`RefCell::try_borrow`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow
4153 [`RefCell::try_borrow_mut`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow_mut
4154 [`SipHasher`]: https://doc.rust-lang.org/std/hash/struct.SipHasher.html
4155 [`DefaultHasher`]: https://doc.rust-lang.org/std/collections/hash_map/struct.DefaultHasher.html
4158 Version 1.12.1 (2016-10-20)
4159 ===========================
4164 * [ICE: 'rustc' panicked at 'assertion failed: concrete_substs.is_normalized_for_trans()' #36381][36381]
4165 * [Confusion with double negation and booleans][36856]
4166 * [rustc 1.12.0 fails with SIGSEGV in release mode (syn crate 0.8.0)][36875]
4167 * [Rustc 1.12.0 Windows build of `ethcore` crate fails with LLVM error][36924]
4168 * [1.12.0: High memory usage when linking in release mode with debug info][36926]
4169 * [Corrupted memory after updated to 1.12][36936]
4170 * ["Let NullaryConstructor = something;" causes internal compiler error: "tried to overwrite interned AdtDef"][37026]
4171 * [Fix ICE: inject bitcast if types mismatch for invokes/calls/stores][37112]
4172 * [debuginfo: Handle spread_arg case in MIR-trans in a more stable way.][37153]
4174 [36381]: https://github.com/rust-lang/rust/issues/36381
4175 [36856]: https://github.com/rust-lang/rust/issues/36856
4176 [36875]: https://github.com/rust-lang/rust/issues/36875
4177 [36924]: https://github.com/rust-lang/rust/issues/36924
4178 [36926]: https://github.com/rust-lang/rust/issues/36926
4179 [36936]: https://github.com/rust-lang/rust/issues/36936
4180 [37026]: https://github.com/rust-lang/rust/issues/37026
4181 [37112]: https://github.com/rust-lang/rust/issues/37112
4182 [37153]: https://github.com/rust-lang/rust/issues/37153
4185 Version 1.12.0 (2016-09-29)
4186 ===========================
4191 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)](https://github.com/rust-lang/rust/pull/34096).
4192 This translation pass is far simpler than the previous AST->LLVM pass, and
4193 creates opportunities to perform new optimizations directly on the MIR. It
4194 was previously described [on the Rust blog](https://blog.rust-lang.org/2016/04/19/MIR.html).
4195 * [`rustc` presents a new, more readable error format, along with
4196 machine-readable JSON error output for use by IDEs](https://github.com/rust-lang/rust/pull/35401).
4197 Most common editors supporting Rust have been updated to work with it. It was
4198 previously described [on the Rust blog](https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
4203 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)](https://github.com/rust-lang/rust/pull/34096).
4204 This translation pass is far simpler than the previous AST->LLVM pass, and
4205 creates opportunities to perform new optimizations directly on the MIR. It
4206 was previously described [on the Rust blog](https://blog.rust-lang.org/2016/04/19/MIR.html).
4207 * [Print the Rust target name, not the LLVM target name, with
4208 `--print target-list`](https://github.com/rust-lang/rust/pull/35489)
4209 * [The computation of `TypeId` is correct in some cases where it was previously
4210 producing inconsistent results](https://github.com/rust-lang/rust/pull/35267)
4211 * [The `mips-unknown-linux-gnu` target uses hardware floating point by default](https://github.com/rust-lang/rust/pull/34910)
4212 * [The `rustc` arguments, `--print target-cpus`, `--print target-features`,
4213 `--print relocation-models`, and `--print code-models` print the available
4214 options to the `-C target-cpu`, `-C target-feature`, `-C relocation-model` and
4215 `-C code-model` code generation arguments](https://github.com/rust-lang/rust/pull/34845)
4216 * [`rustc` supports three new MUSL targets on ARM: `arm-unknown-linux-musleabi`,
4217 `arm-unknown-linux-musleabihf`, and `armv7-unknown-linux-musleabihf`](https://github.com/rust-lang/rust/pull/35060).
4218 These targets produce statically-linked binaries. There are no binary release
4224 * [`rustc` presents a new, more readable error format, along with
4225 machine-readable JSON error output for use by IDEs](https://github.com/rust-lang/rust/pull/35401).
4226 Most common editors supporting Rust have been updated to work with it. It was
4227 previously described [on the Rust blog](https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
4228 * [In error descriptions, references are now described in plain English,
4229 instead of as "&-ptr"](https://github.com/rust-lang/rust/pull/35611)
4230 * [In error type descriptions, unknown numeric types are named `{integer}` or
4231 `{float}` instead of `_`](https://github.com/rust-lang/rust/pull/35080)
4232 * [`rustc` emits a clearer error when inner attributes follow a doc comment](https://github.com/rust-lang/rust/pull/34676)
4237 * [`macro_rules!` invocations can be made within `macro_rules!` invocations](https://github.com/rust-lang/rust/pull/34925)
4238 * [`macro_rules!` meta-variables are hygienic](https://github.com/rust-lang/rust/pull/35453)
4239 * [`macro_rules!` `tt` matchers can be reparsed correctly, making them much more
4240 useful](https://github.com/rust-lang/rust/pull/34908)
4241 * [`macro_rules!` `stmt` matchers correctly consume the entire contents when
4242 inside non-braces invocations](https://github.com/rust-lang/rust/pull/34886)
4243 * [Semicolons are properly required as statement delimiters inside
4244 `macro_rules!` invocations](https://github.com/rust-lang/rust/pull/34660)
4245 * [`cfg_attr` works on `path` attributes](https://github.com/rust-lang/rust/pull/34546)
4250 * [`Cell::as_ptr`](https://doc.rust-lang.org/std/cell/struct.Cell.html#method.as_ptr)
4251 * [`RefCell::as_ptr`](https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.as_ptr)
4252 * [`IpAddr::is_unspecified`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_unspecified)
4253 * [`IpAddr::is_loopback`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_loopback)
4254 * [`IpAddr::is_multicast`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_multicast)
4255 * [`Ipv4Addr::is_unspecified`](https://doc.rust-lang.org/std/net/struct.Ipv4Addr.html#method.is_unspecified)
4256 * [`Ipv6Addr::octets`](https://doc.rust-lang.org/std/net/struct.Ipv6Addr.html#method.octets)
4257 * [`LinkedList::contains`](https://doc.rust-lang.org/std/collections/linked_list/struct.LinkedList.html#method.contains)
4258 * [`VecDeque::contains`](https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.contains)
4259 * [`ExitStatusExt::from_raw`](https://doc.rust-lang.org/std/os/unix/process/trait.ExitStatusExt.html#tymethod.from_raw).
4260 Both on Unix and Windows.
4261 * [`Receiver::recv_timeout`](https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.recv_timeout)
4262 * [`RecvTimeoutError`](https://doc.rust-lang.org/std/sync/mpsc/enum.RecvTimeoutError.html)
4263 * [`BinaryHeap::peek_mut`](https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.peek_mut)
4264 * [`PeekMut`](https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html)
4265 * [`iter::Product`](https://doc.rust-lang.org/std/iter/trait.Product.html)
4266 * [`iter::Sum`](https://doc.rust-lang.org/std/iter/trait.Sum.html)
4267 * [`OccupiedEntry::remove_entry`](https://doc.rust-lang.org/std/collections/btree_map/struct.OccupiedEntry.html#method.remove_entry)
4268 * [`VacantEntry::into_key`](https://doc.rust-lang.org/std/collections/btree_map/struct.VacantEntry.html#method.into_key)
4273 * [The `format!` macro and friends now allow a single argument to be formatted
4274 in multiple styles](https://github.com/rust-lang/rust/pull/33642)
4275 * [The lifetime bounds on `[T]::binary_search_by` and
4276 `[T]::binary_search_by_key` have been adjusted to be more flexible](https://github.com/rust-lang/rust/pull/34762)
4277 * [`Option` implements `From` for its contained type](https://github.com/rust-lang/rust/pull/34828)
4278 * [`Cell`, `RefCell` and `UnsafeCell` implement `From` for their contained type](https://github.com/rust-lang/rust/pull/35392)
4279 * [`RwLock` panics if the reader count overflows](https://github.com/rust-lang/rust/pull/35378)
4280 * [`vec_deque::Drain`, `hash_map::Drain` and `hash_set::Drain` are covariant](https://github.com/rust-lang/rust/pull/35354)
4281 * [`vec::Drain` and `binary_heap::Drain` are covariant](https://github.com/rust-lang/rust/pull/34951)
4282 * [`Cow<str>` implements `FromIterator` for `char`, `&str` and `String`](https://github.com/rust-lang/rust/pull/35064)
4283 * [Sockets on Linux are correctly closed in subprocesses via `SOCK_CLOEXEC`](https://github.com/rust-lang/rust/pull/34946)
4284 * [`hash_map::Entry`, `hash_map::VacantEntry` and `hash_map::OccupiedEntry`
4285 implement `Debug`](https://github.com/rust-lang/rust/pull/34937)
4286 * [`btree_map::Entry`, `btree_map::VacantEntry` and `btree_map::OccupiedEntry`
4287 implement `Debug`](https://github.com/rust-lang/rust/pull/34885)
4288 * [`String` implements `AddAssign`](https://github.com/rust-lang/rust/pull/34890)
4289 * [Variadic `extern fn` pointers implement the `Clone`, `PartialEq`, `Eq`,
4290 `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and `fmt::Debug` traits](https://github.com/rust-lang/rust/pull/34879)
4291 * [`FileType` implements `Debug`](https://github.com/rust-lang/rust/pull/34757)
4292 * [References to `Mutex` and `RwLock` are unwind-safe](https://github.com/rust-lang/rust/pull/34756)
4293 * [`mpsc::sync_channel` `Receiver`s return any available message before
4294 reporting a disconnect](https://github.com/rust-lang/rust/pull/34731)
4295 * [Unicode definitions have been updated to 9.0](https://github.com/rust-lang/rust/pull/34599)
4296 * [`env` iterators implement `DoubleEndedIterator`](https://github.com/rust-lang/rust/pull/33312)
4301 * [Support local mirrors of registries](https://github.com/rust-lang/cargo/pull/2857)
4302 * [Add support for command aliases](https://github.com/rust-lang/cargo/pull/2679)
4303 * [Allow `opt-level="s"` / `opt-level="z"` in profile overrides](https://github.com/rust-lang/cargo/pull/3007)
4304 * [Make `cargo doc --open --target` work as expected](https://github.com/rust-lang/cargo/pull/2988)
4305 * [Speed up noop registry updates](https://github.com/rust-lang/cargo/pull/2974)
4306 * [Update OpenSSL](https://github.com/rust-lang/cargo/pull/2971)
4307 * [Fix `--panic=abort` with plugins](https://github.com/rust-lang/cargo/pull/2954)
4308 * [Always pass `-C metadata` to the compiler](https://github.com/rust-lang/cargo/pull/2946)
4309 * [Fix depending on git repos with workspaces](https://github.com/rust-lang/cargo/pull/2938)
4310 * [Add a `--lib` flag to `cargo new`](https://github.com/rust-lang/cargo/pull/2921)
4311 * [Add `http.cainfo` for custom certs](https://github.com/rust-lang/cargo/pull/2917)
4312 * [Indicate the compilation profile after compiling](https://github.com/rust-lang/cargo/pull/2909)
4313 * [Allow enabling features for dependencies with `--features`](https://github.com/rust-lang/cargo/pull/2876)
4314 * [Add `--jobs` flag to `cargo package`](https://github.com/rust-lang/cargo/pull/2867)
4315 * [Add `--dry-run` to `cargo publish`](https://github.com/rust-lang/cargo/pull/2849)
4316 * [Add support for `RUSTDOCFLAGS`](https://github.com/rust-lang/cargo/pull/2794)
4321 * [`panic::catch_unwind` is more optimized](https://github.com/rust-lang/rust/pull/35444)
4322 * [`panic::catch_unwind` no longer accesses thread-local storage on entry](https://github.com/rust-lang/rust/pull/34866)
4327 * [Test binaries now support a `--test-threads` argument to specify the number
4328 of threads used to run tests, and which acts the same as the
4329 `RUST_TEST_THREADS` environment variable](https://github.com/rust-lang/rust/pull/35414)
4330 * [The test runner now emits a warning when tests run over 60 seconds](https://github.com/rust-lang/rust/pull/35405)
4331 * [rustdoc: Fix methods in search results](https://github.com/rust-lang/rust/pull/34752)
4332 * [`rust-lldb` warns about unsupported versions of LLDB](https://github.com/rust-lang/rust/pull/34646)
4333 * [Rust releases now come with source packages that can be installed by rustup
4334 via `rustup component add rust-src`](https://github.com/rust-lang/rust/pull/34366).
4335 The resulting source code can be used by tools and IDES, located in the
4336 sysroot under `lib/rustlib/src`.
4341 * [The compiler can now be built against LLVM 3.9](https://github.com/rust-lang/rust/pull/35594)
4342 * Many minor improvements to the documentation.
4343 * [The Rust exception handling "personality" routine is now written in Rust](https://github.com/rust-lang/rust/pull/34832)
4348 * [When printing Windows `OsStr`s, unpaired surrogate codepoints are escaped
4349 with the lowercase format instead of the uppercase](https://github.com/rust-lang/rust/pull/35084)
4350 * [When formatting strings, if "precision" is specified, the "fill",
4351 "align" and "width" specifiers are no longer ignored](https://github.com/rust-lang/rust/pull/34544)
4352 * [The `Debug` impl for strings no longer escapes all non-ASCII characters](https://github.com/rust-lang/rust/pull/34485)
4355 Version 1.11.0 (2016-08-18)
4356 ===========================
4361 * [`cfg_attr` works on `path` attributes](https://github.com/rust-lang/rust/pull/34546)
4362 * [Support nested `cfg_attr` attributes](https://github.com/rust-lang/rust/pull/34216)
4363 * [Allow statement-generating braced macro invocations at the end of blocks](https://github.com/rust-lang/rust/pull/34436)
4364 * [Macros can be expanded inside of trait definitions](https://github.com/rust-lang/rust/pull/34213)
4365 * [`#[macro_use]` works properly when it is itself expanded from a macro](https://github.com/rust-lang/rust/pull/34032)
4370 * [`BinaryHeap::append`](https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.append)
4371 * [`BTreeMap::append`](https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.append)
4372 * [`BTreeMap::split_off`](https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.split_off)
4373 * [`BTreeSet::append`](https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.append)
4374 * [`BTreeSet::split_off`](https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.split_off)
4375 * [`f32::to_degrees`](https://doc.rust-lang.org/std/primitive.f32.html#method.to_degrees)
4376 (in libcore - previously stabilized in libstd)
4377 * [`f32::to_radians`](https://doc.rust-lang.org/std/primitive.f32.html#method.to_radians)
4378 (in libcore - previously stabilized in libstd)
4379 * [`f64::to_degrees`](https://doc.rust-lang.org/std/primitive.f64.html#method.to_degrees)
4380 (in libcore - previously stabilized in libstd)
4381 * [`f64::to_radians`](https://doc.rust-lang.org/std/primitive.f64.html#method.to_radians)
4382 (in libcore - previously stabilized in libstd)
4383 * [`Iterator::sum`](https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
4384 * [`Iterator::product`](https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
4385 * [`Cell::get_mut`](https://doc.rust-lang.org/std/cell/struct.Cell.html#method.get_mut)
4386 * [`RefCell::get_mut`](https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.get_mut)
4391 * [The `thread_local!` macro supports multiple definitions in a single
4392 invocation, and can apply attributes](https://github.com/rust-lang/rust/pull/34077)
4393 * [`Cow` implements `Default`](https://github.com/rust-lang/rust/pull/34305)
4394 * [`Wrapping` implements binary, octal, lower-hex and upper-hex
4395 `Display` formatting](https://github.com/rust-lang/rust/pull/34190)
4396 * [The range types implement `Hash`](https://github.com/rust-lang/rust/pull/34180)
4397 * [`lookup_host` ignores unknown address types](https://github.com/rust-lang/rust/pull/34067)
4398 * [`assert_eq!` accepts a custom error message, like `assert!` does](https://github.com/rust-lang/rust/pull/33976)
4399 * [The main thread is now called "main" instead of "<main>"](https://github.com/rust-lang/rust/pull/33803)
4404 * [Disallow specifying features of transitive deps](https://github.com/rust-lang/cargo/pull/2821)
4405 * [Add color support for Windows consoles](https://github.com/rust-lang/cargo/pull/2804)
4406 * [Fix `harness = false` on `[lib]` sections](https://github.com/rust-lang/cargo/pull/2795)
4407 * [Don't panic when `links` contains a '.'](https://github.com/rust-lang/cargo/pull/2787)
4408 * [Build scripts can emit warnings](https://github.com/rust-lang/cargo/pull/2630),
4409 and `-vv` prints warnings for all crates.
4410 * [Ignore file locks on OS X NFS mounts](https://github.com/rust-lang/cargo/pull/2720)
4411 * [Don't warn about `package.metadata` keys](https://github.com/rust-lang/cargo/pull/2668).
4412 This provides room for expansion by arbitrary tools.
4413 * [Add support for cdylib crate types](https://github.com/rust-lang/cargo/pull/2741)
4414 * [Prevent publishing crates when files are dirty](https://github.com/rust-lang/cargo/pull/2781)
4415 * [Don't fetch all crates on clean](https://github.com/rust-lang/cargo/pull/2704)
4416 * [Propagate --color option to rustc](https://github.com/rust-lang/cargo/pull/2779)
4417 * [Fix `cargo doc --open` on Windows](https://github.com/rust-lang/cargo/pull/2780)
4418 * [Improve autocompletion](https://github.com/rust-lang/cargo/pull/2772)
4419 * [Configure colors of stderr as well as stdout](https://github.com/rust-lang/cargo/pull/2739)
4424 * [Caching projections speeds up type check dramatically for some
4425 workloads](https://github.com/rust-lang/rust/pull/33816)
4426 * [The default `HashMap` hasher is SipHash 1-3 instead of SipHash 2-4](https://github.com/rust-lang/rust/pull/33940)
4427 This hasher is faster, but is believed to provide sufficient
4428 protection from collision attacks.
4429 * [Comparison of `Ipv4Addr` is 10x faster](https://github.com/rust-lang/rust/pull/33891)
4434 * [Fix empty implementation section on some module pages](https://github.com/rust-lang/rust/pull/34536)
4435 * [Fix inlined renamed re-exports in import lists](https://github.com/rust-lang/rust/pull/34479)
4436 * [Fix search result layout for enum variants and struct fields](https://github.com/rust-lang/rust/pull/34477)
4437 * [Fix issues with source links to external crates](https://github.com/rust-lang/rust/pull/34387)
4438 * [Fix redirect pages for renamed re-exports](https://github.com/rust-lang/rust/pull/34245)
4443 * [rustc is better at finding the MSVC toolchain](https://github.com/rust-lang/rust/pull/34492)
4444 * [When emitting debug info, rustc emits frame pointers for closures,
4445 shims and glue, as it does for all other functions](https://github.com/rust-lang/rust/pull/33909)
4446 * [rust-lldb warns about unsupported versions of LLDB](https://github.com/rust-lang/rust/pull/34646)
4447 * Many more errors have been given error codes and extended
4449 * API documentation continues to be improved, with many new examples
4454 * [rustc no longer hangs when dependencies recursively re-export
4455 submodules](https://github.com/rust-lang/rust/pull/34542)
4456 * [rustc requires LLVM 3.7+](https://github.com/rust-lang/rust/pull/34104)
4457 * [The 'How Safe and Unsafe Interact' chapter of The Rustonomicon was
4458 rewritten](https://github.com/rust-lang/rust/pull/33895)
4459 * [rustc support 16-bit pointer sizes](https://github.com/rust-lang/rust/pull/33460).
4460 No targets use this yet, but it works toward AVR support.
4465 * [`const`s and `static`s may not have unsized types](https://github.com/rust-lang/rust/pull/34443)
4466 * [The new follow-set rules that place restrictions on `macro_rules!`
4467 in order to ensure syntax forward-compatibility have been enabled](https://github.com/rust-lang/rust/pull/33982)
4468 This was an [amendment to RFC 550](https://github.com/rust-lang/rfcs/pull/1384),
4469 and has been a warning since 1.10.
4470 * [`cfg` attribute process has been refactored to fix various bugs](https://github.com/rust-lang/rust/pull/33706).
4471 This causes breakage in some corner cases.
4474 Version 1.10.0 (2016-07-07)
4475 ===========================
4480 * [Allow `concat_idents!` in type positions as well as in expression
4481 positions](https://github.com/rust-lang/rust/pull/33735).
4482 * [`Copy` types are required to have a trivial implementation of `Clone`](https://github.com/rust-lang/rust/pull/33420).
4483 [RFC 1521](https://github.com/rust-lang/rfcs/blob/master/text/1521-copy-clone-semantics.md).
4484 * [Single-variant enums support the `#[repr(..)]` attribute](https://github.com/rust-lang/rust/pull/33355).
4485 * [Fix `#[derive(RustcEncodable)]` in the presence of other `encode` methods](https://github.com/rust-lang/rust/pull/32908).
4486 * [`panic!` can be converted to a runtime abort with the
4487 `-C panic=abort` flag](https://github.com/rust-lang/rust/pull/32900).
4488 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
4489 * [Add a new crate type, 'cdylib'](https://github.com/rust-lang/rust/pull/33553).
4490 cdylibs are dynamic libraries suitable for loading by non-Rust hosts.
4491 [RFC 1510](https://github.com/rust-lang/rfcs/blob/master/text/1510-cdylib.md).
4492 Note that Cargo does not yet directly support cdylibs.
4497 * `os::windows::fs::OpenOptionsExt::access_mode`
4498 * `os::windows::fs::OpenOptionsExt::share_mode`
4499 * `os::windows::fs::OpenOptionsExt::custom_flags`
4500 * `os::windows::fs::OpenOptionsExt::attributes`
4501 * `os::windows::fs::OpenOptionsExt::security_qos_flags`
4502 * `os::unix::fs::OpenOptionsExt::custom_flags`
4503 * [`sync::Weak::new`](http://doc.rust-lang.org/alloc/arc/struct.Weak.html#method.new)
4504 * `Default for sync::Weak`
4505 * [`panic::set_hook`](http://doc.rust-lang.org/std/panic/fn.set_hook.html)
4506 * [`panic::take_hook`](http://doc.rust-lang.org/std/panic/fn.take_hook.html)
4507 * [`panic::PanicInfo`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html)
4508 * [`panic::PanicInfo::payload`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.payload)
4509 * [`panic::PanicInfo::location`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.location)
4510 * [`panic::Location`](http://doc.rust-lang.org/std/panic/struct.Location.html)
4511 * [`panic::Location::file`](http://doc.rust-lang.org/std/panic/struct.Location.html#method.file)
4512 * [`panic::Location::line`](http://doc.rust-lang.org/std/panic/struct.Location.html#method.line)
4513 * [`ffi::CStr::from_bytes_with_nul`](http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul)
4514 * [`ffi::CStr::from_bytes_with_nul_unchecked`](http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul_unchecked)
4515 * [`ffi::FromBytesWithNulError`](http://doc.rust-lang.org/std/ffi/struct.FromBytesWithNulError.html)
4516 * [`fs::Metadata::modified`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.modified)
4517 * [`fs::Metadata::accessed`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.accessed)
4518 * [`fs::Metadata::created`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.created)
4519 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange`
4520 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange_weak`
4521 * `collections::{btree,hash}_map::{Occupied,Vacant,}Entry::key`
4522 * `os::unix::net::{UnixStream, UnixListener, UnixDatagram, SocketAddr}`
4523 * [`SocketAddr::is_unnamed`](http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.is_unnamed)
4524 * [`SocketAddr::as_pathname`](http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.as_pathname)
4525 * [`UnixStream::connect`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.connect)
4526 * [`UnixStream::pair`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.pair)
4527 * [`UnixStream::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.try_clone)
4528 * [`UnixStream::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.local_addr)
4529 * [`UnixStream::peer_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.peer_addr)
4530 * [`UnixStream::set_read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
4531 * [`UnixStream::set_write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
4532 * [`UnixStream::read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
4533 * [`UnixStream::write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
4534 * [`UnixStream::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.set_nonblocking)
4535 * [`UnixStream::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.take_error)
4536 * [`UnixStream::shutdown`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.shutdown)
4537 * Read/Write/RawFd impls for `UnixStream`
4538 * [`UnixListener::bind`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.bind)
4539 * [`UnixListener::accept`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.accept)
4540 * [`UnixListener::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.try_clone)
4541 * [`UnixListener::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.local_addr)
4542 * [`UnixListener::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.set_nonblocking)
4543 * [`UnixListener::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.take_error)
4544 * [`UnixListener::incoming`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.incoming)
4545 * RawFd impls for `UnixListener`
4546 * [`UnixDatagram::bind`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.bind)
4547 * [`UnixDatagram::unbound`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.unbound)
4548 * [`UnixDatagram::pair`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.pair)
4549 * [`UnixDatagram::connect`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.connect)
4550 * [`UnixDatagram::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.try_clone)
4551 * [`UnixDatagram::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.local_addr)
4552 * [`UnixDatagram::peer_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.peer_addr)
4553 * [`UnixDatagram::recv_from`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv_from)
4554 * [`UnixDatagram::recv`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv)
4555 * [`UnixDatagram::send_to`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send_to)
4556 * [`UnixDatagram::send`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send)
4557 * [`UnixDatagram::set_read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_read_timeout)
4558 * [`UnixDatagram::set_write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_write_timeout)
4559 * [`UnixDatagram::read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.read_timeout)
4560 * [`UnixDatagram::write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.write_timeout)
4561 * [`UnixDatagram::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_nonblocking)
4562 * [`UnixDatagram::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.take_error)
4563 * [`UnixDatagram::shutdown`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.shutdown)
4564 * RawFd impls for `UnixDatagram`
4565 * `{BTree,Hash}Map::values_mut`
4566 * [`<[_]>::binary_search_by_key`](http://doc.rust-lang.org/std/primitive.slice.html#method.binary_search_by_key)
4571 * [The `abs_sub` method of floats is deprecated](https://github.com/rust-lang/rust/pull/33664).
4572 The semantics of this minor method are subtle and probably not what
4574 * [Add implementation of Ord for Cell<T> and RefCell<T> where T: Ord](https://github.com/rust-lang/rust/pull/33306).
4575 * [On Linux, if `HashMap`s can't be initialized with `getrandom` they
4576 will fall back to `/dev/urandom` temporarily to avoid blocking
4577 during early boot](https://github.com/rust-lang/rust/pull/33086).
4578 * [Implemented negation for wrapping numerals](https://github.com/rust-lang/rust/pull/33067).
4579 * [Implement `Clone` for `binary_heap::IntoIter`](https://github.com/rust-lang/rust/pull/33050).
4580 * [Implement `Display` and `Hash` for `std::num::Wrapping`](https://github.com/rust-lang/rust/pull/33023).
4581 * [Add `Default` implementation for `&CStr`, `CString`](https://github.com/rust-lang/rust/pull/32990).
4582 * [Implement `From<Vec<T>>` and `Into<Vec<T>>` for `VecDeque<T>`](https://github.com/rust-lang/rust/pull/32866).
4583 * [Implement `Default` for `UnsafeCell`, `fmt::Error`, `Condvar`,
4584 `Mutex`, `RwLock`](https://github.com/rust-lang/rust/pull/32785).
4588 * [Cargo.toml supports the `profile.*.panic` option](https://github.com/rust-lang/cargo/pull/2687).
4589 This controls the runtime behavior of the `panic!` macro
4590 and can be either "unwind" (the default), or "abort".
4591 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
4592 * [Don't throw away errors with `-p` arguments](https://github.com/rust-lang/cargo/pull/2723).
4593 * [Report status to stderr instead of stdout](https://github.com/rust-lang/cargo/pull/2693).
4594 * [Build scripts are passed a `CARGO_MANIFEST_LINKS` environment
4595 variable that corresponds to the `links` field of the manifest](https://github.com/rust-lang/cargo/pull/2710).
4596 * [Ban keywords from crate names](https://github.com/rust-lang/cargo/pull/2707).
4597 * [Canonicalize `CARGO_HOME` on Windows](https://github.com/rust-lang/cargo/pull/2604).
4598 * [Retry network requests](https://github.com/rust-lang/cargo/pull/2396).
4599 By default they are retried twice, which can be customized with the
4600 `net.retry` value in `.cargo/config`.
4601 * [Don't print extra error info for failing subcommands](https://github.com/rust-lang/cargo/pull/2674).
4602 * [Add `--force` flag to `cargo install`](https://github.com/rust-lang/cargo/pull/2405).
4603 * [Don't use `flock` on NFS mounts](https://github.com/rust-lang/cargo/pull/2623).
4604 * [Prefer building `cargo install` artifacts in temporary directories](https://github.com/rust-lang/cargo/pull/2610).
4605 Makes it possible to install multiple crates in parallel.
4606 * [Add `cargo test --doc`](https://github.com/rust-lang/cargo/pull/2578).
4607 * [Add `cargo --explain`](https://github.com/rust-lang/cargo/pull/2551).
4608 * [Don't print warnings when `-q` is passed](https://github.com/rust-lang/cargo/pull/2576).
4609 * [Add `cargo doc --lib` and `--bin`](https://github.com/rust-lang/cargo/pull/2577).
4610 * [Don't require build script output to be UTF-8](https://github.com/rust-lang/cargo/pull/2560).
4611 * [Correctly attempt multiple git usernames](https://github.com/rust-lang/cargo/pull/2584).
4616 * [rustc memory usage was reduced by refactoring the context used for
4617 type checking](https://github.com/rust-lang/rust/pull/33425).
4618 * [Speed up creation of `HashMap`s by caching the random keys used
4619 to initialize the hash state](https://github.com/rust-lang/rust/pull/33318).
4620 * [The `find` implementation for `Chain` iterators is 2x faster](https://github.com/rust-lang/rust/pull/33289).
4621 * [Trait selection optimizations speed up type checking by 15%](https://github.com/rust-lang/rust/pull/33138).
4622 * [Efficient trie lookup for boolean Unicode properties](https://github.com/rust-lang/rust/pull/33098).
4623 10x faster than the previous lookup tables.
4624 * [Special case `#[derive(Copy, Clone)]` to avoid bloat](https://github.com/rust-lang/rust/pull/31414).
4629 * Many incremental improvements to documentation and rustdoc.
4630 * [rustdoc: List blanket trait impls](https://github.com/rust-lang/rust/pull/33514).
4631 * [rustdoc: Clean up ABI rendering](https://github.com/rust-lang/rust/pull/33151).
4632 * [Indexing with the wrong type produces a more informative error](https://github.com/rust-lang/rust/pull/33401).
4633 * [Improve diagnostics for constants being used in irrefutable patterns](https://github.com/rust-lang/rust/pull/33406).
4634 * [When many method candidates are in scope limit the suggestions to 10](https://github.com/rust-lang/rust/pull/33338).
4635 * [Remove confusing suggestion when calling a `fn` type](https://github.com/rust-lang/rust/pull/33325).
4636 * [Do not suggest changing `&mut self` to `&mut mut self`](https://github.com/rust-lang/rust/pull/33319).
4641 * [Update i686-linux-android features to match Android ABI](https://github.com/rust-lang/rust/pull/33651).
4642 * [Update aarch64-linux-android features to match Android ABI](https://github.com/rust-lang/rust/pull/33500).
4643 * [`std` no longer prints backtraces on platforms where the running
4644 module must be loaded with `env::current_exe`, which can't be relied
4645 on](https://github.com/rust-lang/rust/pull/33554).
4646 * This release includes std binaries for the i586-unknown-linux-gnu,
4647 i686-unknown-linux-musl, and armv7-linux-androideabi targets. The
4648 i586 target is for old x86 hardware without SSE2, and the armv7
4649 target is for Android running on modern ARM architectures.
4650 * [The `rust-gdb` and `rust-lldb` scripts are distributed on all
4651 Unix platforms](https://github.com/rust-lang/rust/pull/32835).
4652 * [On Unix the runtime aborts by calling `libc::abort` instead of
4653 generating an illegal instruction](https://github.com/rust-lang/rust/pull/31457).
4654 * [Rust is now bootstrapped from the previous release of Rust,
4655 instead of a snapshot from an arbitrary commit](https://github.com/rust-lang/rust/pull/32942).
4660 * [`AtomicBool` is now bool-sized, not word-sized](https://github.com/rust-lang/rust/pull/33579).
4661 * [`target_env` for Linux ARM targets is just `gnu`, not
4662 `gnueabihf`, `gnueabi`, etc](https://github.com/rust-lang/rust/pull/33403).
4663 * [Consistently panic on overflow in `Duration::new`](https://github.com/rust-lang/rust/pull/33072).
4664 * [Change `String::truncate` to panic less](https://github.com/rust-lang/rust/pull/32977).
4665 * [Add `:block` to the follow set for `:ty` and `:path`](https://github.com/rust-lang/rust/pull/32945).
4666 Affects how macros are parsed.
4667 * [Fix macro hygiene bug](https://github.com/rust-lang/rust/pull/32923).
4668 * [Feature-gated attributes on macro-generated macro invocations are
4669 now rejected](https://github.com/rust-lang/rust/pull/32791).
4670 * [Suppress fallback and ambiguity errors during type inference](https://github.com/rust-lang/rust/pull/32258).
4671 This caused some minor changes to type inference.
4674 Version 1.9.0 (2016-05-26)
4675 ==========================
4680 * The `#[deprecated]` attribute when applied to an API will generate
4681 warnings when used. The warnings may be suppressed with
4682 `#[allow(deprecated)]`. [RFC 1270].
4683 * [`fn` item types are zero sized, and each `fn` names a unique
4684 type][1.9fn]. This will break code that transmutes `fn`s, so calling
4685 `transmute` on a `fn` type will generate a warning for a few cycles,
4686 then will be converted to an error.
4687 * [Field and method resolution understand visibility, so private
4688 fields and methods cannot prevent the proper use of public fields
4689 and methods][1.9fv].
4690 * [The parser considers unicode codepoints in the
4691 `PATTERN_WHITE_SPACE` category to be whitespace][1.9ws].
4697 * [`std::panic::catch_unwind`][] (renamed from `recover`)
4698 * [`std::panic::resume_unwind`][] (renamed from `propagate`)
4699 * [`std::panic::AssertUnwindSafe`][] (renamed from `AssertRecoverSafe`)
4700 * [`std::panic::UnwindSafe`][] (renamed from `RecoverSafe`)
4701 * [`str::is_char_boundary`]
4702 * [`<*const T>::as_ref`]
4703 * [`<*mut T>::as_ref`]
4704 * [`<*mut T>::as_mut`]
4705 * [`AsciiExt::make_ascii_uppercase`]
4706 * [`AsciiExt::make_ascii_lowercase`]
4707 * [`char::decode_utf16`]
4708 * [`char::DecodeUtf16`]
4709 * [`char::DecodeUtf16Error`]
4710 * [`char::DecodeUtf16Error::unpaired_surrogate`]
4711 * [`BTreeSet::take`]
4712 * [`BTreeSet::replace`]
4715 * [`HashSet::replace`]
4717 * [`OsString::with_capacity`]
4718 * [`OsString::clear`]
4719 * [`OsString::capacity`]
4720 * [`OsString::reserve`]
4721 * [`OsString::reserve_exact`]
4722 * [`OsStr::is_empty`]
4724 * [`std::os::unix::thread`]
4727 * [`JoinHandleExt::as_pthread_t`]
4728 * [`JoinHandleExt::into_pthread_t`]
4729 * [`HashSet::hasher`]
4730 * [`HashMap::hasher`]
4731 * [`CommandExt::exec`]
4732 * [`File::try_clone`]
4733 * [`SocketAddr::set_ip`]
4734 * [`SocketAddr::set_port`]
4735 * [`SocketAddrV4::set_ip`]
4736 * [`SocketAddrV4::set_port`]
4737 * [`SocketAddrV6::set_ip`]
4738 * [`SocketAddrV6::set_port`]
4739 * [`SocketAddrV6::set_flowinfo`]
4740 * [`SocketAddrV6::set_scope_id`]
4741 * [`slice::copy_from_slice`]
4742 * [`ptr::read_volatile`]
4743 * [`ptr::write_volatile`]
4744 * [`OpenOptions::create_new`]
4745 * [`TcpStream::set_nodelay`]
4746 * [`TcpStream::nodelay`]
4747 * [`TcpStream::set_ttl`]
4748 * [`TcpStream::ttl`]
4749 * [`TcpStream::set_only_v6`]
4750 * [`TcpStream::only_v6`]
4751 * [`TcpStream::take_error`]
4752 * [`TcpStream::set_nonblocking`]
4753 * [`TcpListener::set_ttl`]
4754 * [`TcpListener::ttl`]
4755 * [`TcpListener::set_only_v6`]
4756 * [`TcpListener::only_v6`]
4757 * [`TcpListener::take_error`]
4758 * [`TcpListener::set_nonblocking`]
4759 * [`UdpSocket::set_broadcast`]
4760 * [`UdpSocket::broadcast`]
4761 * [`UdpSocket::set_multicast_loop_v4`]
4762 * [`UdpSocket::multicast_loop_v4`]
4763 * [`UdpSocket::set_multicast_ttl_v4`]
4764 * [`UdpSocket::multicast_ttl_v4`]
4765 * [`UdpSocket::set_multicast_loop_v6`]
4766 * [`UdpSocket::multicast_loop_v6`]
4767 * [`UdpSocket::set_multicast_ttl_v6`]
4768 * [`UdpSocket::multicast_ttl_v6`]
4769 * [`UdpSocket::set_ttl`]
4770 * [`UdpSocket::ttl`]
4771 * [`UdpSocket::set_only_v6`]
4772 * [`UdpSocket::only_v6`]
4773 * [`UdpSocket::join_multicast_v4`]
4774 * [`UdpSocket::join_multicast_v6`]
4775 * [`UdpSocket::leave_multicast_v4`]
4776 * [`UdpSocket::leave_multicast_v6`]
4777 * [`UdpSocket::take_error`]
4778 * [`UdpSocket::connect`]
4779 * [`UdpSocket::send`]
4780 * [`UdpSocket::recv`]
4781 * [`UdpSocket::set_nonblocking`]
4786 * [`std::sync::Once` is poisoned if its initialization function
4788 * [`cell::Ref` and `cell::RefMut` can contain unsized types][1.9cu].
4789 * [Most types implement `fmt::Debug`][1.9db].
4790 * [The default buffer size used by `BufReader` and `BufWriter` was
4791 reduced to 8K, from 64K][1.9bf]. This is in line with the buffer size
4792 used by other languages.
4793 * [`Instant`, `SystemTime` and `Duration` implement `+=` and `-=`.
4794 `Duration` additionally implements `*=` and `/=`][1.9ta].
4795 * [`Skip` is a `DoubleEndedIterator`][1.9sk].
4796 * [`From<[u8; 4]>` is implemented for `Ipv4Addr`][1.9fi].
4797 * [`Chain` implements `BufRead`][1.9ch].
4798 * [`HashMap`, `HashSet` and iterators are covariant][1.9hc].
4803 * [Cargo can now run concurrently][1.9cc].
4804 * [Top-level overrides allow specific revisions of crates to be
4805 overridden through the entire crate graph][1.9ct]. This is intended
4806 to make upgrades easier for large projects, by allowing crates to be
4807 forked temporarily until they've been upgraded and republished.
4808 * [Cargo exports a `CARGO_PKG_AUTHORS` environment variable][1.9cp].
4809 * [Cargo will pass the contents of the `RUSTFLAGS` variable to `rustc`
4810 on the commandline][1.9cf]. `rustc` arguments can also be specified
4811 in the `build.rustflags` configuration key.
4816 * [The time complexity of comparing variables for equivalence during type
4817 unification is reduced from _O_(_n_!) to _O_(_n_)][1.9tu]. This leads
4818 to major compilation time improvement in some scenarios.
4819 * [`ToString` is specialized for `str`, giving it the same performance
4820 as `to_owned`][1.9ts].
4821 * [Spawning processes with `Command::output` no longer creates extra
4823 * [`#[derive(PartialEq)]` and `#[derive(PartialOrd)]` emit less code
4824 for C-like enums][1.9cl].
4829 * [Passing the `--quiet` flag to a test runner will produce
4830 much-abbreviated output][1.9q].
4831 * The Rust Project now publishes std binaries for the
4832 `mips-unknown-linux-musl`, `mipsel-unknown-linux-musl`, and
4833 `i586-pc-windows-msvc` targets.
4838 * [`std::sync::Once` is poisoned if its initialization function
4840 * [It is illegal to define methods with the same name in overlapping
4841 inherent `impl` blocks][1.9sn].
4842 * [`fn` item types are zero sized, and each `fn` names a unique
4843 type][1.9fn]. This will break code that transmutes `fn`s, so calling
4844 `transmute` on a `fn` type will generate a warning for a few cycles,
4845 then will be converted to an error.
4846 * [Improvements to const evaluation may trigger new errors when integer
4847 literals are out of range][1.9ce].
4850 [1.9bf]: https://github.com/rust-lang/rust/pull/32695
4851 [1.9cc]: https://github.com/rust-lang/cargo/pull/2486
4852 [1.9ce]: https://github.com/rust-lang/rust/pull/30587
4853 [1.9cf]: https://github.com/rust-lang/cargo/pull/2241
4854 [1.9ch]: https://github.com/rust-lang/rust/pull/32541
4855 [1.9cl]: https://github.com/rust-lang/rust/pull/31977
4856 [1.9cp]: https://github.com/rust-lang/cargo/pull/2465
4857 [1.9ct]: https://github.com/rust-lang/cargo/pull/2385
4858 [1.9cu]: https://github.com/rust-lang/rust/pull/32652
4859 [1.9db]: https://github.com/rust-lang/rust/pull/32054
4860 [1.9fi]: https://github.com/rust-lang/rust/pull/32050
4861 [1.9fn]: https://github.com/rust-lang/rust/pull/31710
4862 [1.9fv]: https://github.com/rust-lang/rust/pull/31938
4863 [1.9hc]: https://github.com/rust-lang/rust/pull/32635
4864 [1.9o]: https://github.com/rust-lang/rust/pull/32325
4865 [1.9q]: https://github.com/rust-lang/rust/pull/31887
4866 [1.9sk]: https://github.com/rust-lang/rust/pull/31700
4867 [1.9sn]: https://github.com/rust-lang/rust/pull/31925
4868 [1.9sp]: https://github.com/rust-lang/rust/pull/31618
4869 [1.9ta]: https://github.com/rust-lang/rust/pull/32448
4870 [1.9ts]: https://github.com/rust-lang/rust/pull/32586
4871 [1.9tu]: https://github.com/rust-lang/rust/pull/32062
4872 [1.9ws]: https://github.com/rust-lang/rust/pull/29734
4873 [RFC 1270]: https://github.com/rust-lang/rfcs/blob/master/text/1270-deprecation.md
4874 [`<*const T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
4875 [`<*mut T>::as_mut`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_mut
4876 [`<*mut T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
4877 [`slice::copy_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.copy_from_slice
4878 [`AsciiExt::make_ascii_lowercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_lowercase
4879 [`AsciiExt::make_ascii_uppercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_uppercase
4880 [`BTreeSet::get`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.get
4881 [`BTreeSet::replace`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.replace
4882 [`BTreeSet::take`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.take
4883 [`CommandExt::exec`]: http://doc.rust-lang.org/nightly/std/os/unix/process/trait.CommandExt.html#tymethod.exec
4884 [`File::try_clone`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html#method.try_clone
4885 [`HashMap::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.hasher
4886 [`HashSet::get`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.get
4887 [`HashSet::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.hasher
4888 [`HashSet::replace`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.replace
4889 [`HashSet::take`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.take
4890 [`JoinHandleExt::as_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.as_pthread_t
4891 [`JoinHandleExt::into_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.into_pthread_t
4892 [`JoinHandleExt`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html
4893 [`OpenOptions::create_new`]: http://doc.rust-lang.org/nightly/std/fs/struct.OpenOptions.html#method.create_new
4894 [`OsStr::is_empty`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.is_empty
4895 [`OsStr::len`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.len
4896 [`OsString::capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.capacity
4897 [`OsString::clear`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.clear
4898 [`OsString::reserve_exact`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve_exact
4899 [`OsString::reserve`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve
4900 [`OsString::with_capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.with_capacity
4901 [`RawPthread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/type.RawPthread.html
4902 [`SocketAddr::set_ip`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_ip
4903 [`SocketAddr::set_port`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_port
4904 [`SocketAddrV4::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_ip
4905 [`SocketAddrV4::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_port
4906 [`SocketAddrV6::set_flowinfo`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_flowinfo
4907 [`SocketAddrV6::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_ip
4908 [`SocketAddrV6::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_port
4909 [`SocketAddrV6::set_scope_id`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_scope_id
4910 [`TcpListener::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
4911 [`TcpListener::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
4912 [`TcpListener::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
4913 [`TcpListener::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
4914 [`TcpListener::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
4915 [`TcpListener::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
4916 [`TcpStream::nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.nodelay
4917 [`TcpStream::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
4918 [`TcpStream::set_nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nodelay
4919 [`TcpStream::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
4920 [`TcpStream::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
4921 [`TcpStream::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
4922 [`TcpStream::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
4923 [`TcpStream::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
4924 [`UdpSocket::broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.broadcast
4925 [`UdpSocket::connect`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.connect
4926 [`UdpSocket::join_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v4
4927 [`UdpSocket::join_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v6
4928 [`UdpSocket::leave_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v4
4929 [`UdpSocket::leave_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v6
4930 [`UdpSocket::multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v4
4931 [`UdpSocket::multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v6
4932 [`UdpSocket::multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v4
4933 [`UdpSocket::multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v6
4934 [`UdpSocket::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.only_v6
4935 [`UdpSocket::recv`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.recv
4936 [`UdpSocket::send`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.send
4937 [`UdpSocket::set_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_broadcast
4938 [`UdpSocket::set_multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v4
4939 [`UdpSocket::set_multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v6
4940 [`UdpSocket::set_multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v4
4941 [`UdpSocket::set_multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v6
4942 [`UdpSocket::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_nonblocking
4943 [`UdpSocket::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_only_v6
4944 [`UdpSocket::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_ttl
4945 [`UdpSocket::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.take_error
4946 [`UdpSocket::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.ttl
4947 [`char::DecodeUtf16Error::unpaired_surrogate`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html#method.unpaired_surrogate
4948 [`char::DecodeUtf16Error`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html
4949 [`char::DecodeUtf16`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16.html
4950 [`char::decode_utf16`]: http://doc.rust-lang.org/nightly/std/char/fn.decode_utf16.html
4951 [`ptr::read_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.read_volatile.html
4952 [`ptr::write_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.write_volatile.html
4953 [`std::os::unix::thread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/index.html
4954 [`std::panic::AssertUnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/struct.AssertUnwindSafe.html
4955 [`std::panic::UnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/trait.UnwindSafe.html
4956 [`std::panic::catch_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.catch_unwind.html
4957 [`std::panic::resume_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.resume_unwind.html
4958 [`std::panic`]: http://doc.rust-lang.org/nightly/std/panic/index.html
4959 [`str::is_char_boundary`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.is_char_boundary
4962 Version 1.8.0 (2016-04-14)
4963 ==========================
4968 * Rust supports overloading of compound assignment statements like
4969 `+=` by implementing the [`AddAssign`], [`SubAssign`],
4970 [`MulAssign`], [`DivAssign`], [`RemAssign`], [`BitAndAssign`],
4971 [`BitOrAssign`], [`BitXorAssign`], [`ShlAssign`], or [`ShrAssign`]
4973 * Empty structs can be defined with braces, as in `struct Foo { }`, in
4974 addition to the non-braced form, `struct Foo;`. [RFC 218].
4980 * [`str::encode_utf16`][] (renamed from `utf16_units`)
4981 * [`str::EncodeUtf16`][] (renamed from `Utf16Units`)
4984 * [`ptr::drop_in_place`]
4986 * [`time::SystemTime`]
4988 * [`Instant::duration_since`][] (renamed from `duration_from_earlier`)
4989 * [`Instant::elapsed`]
4990 * [`SystemTime::now`]
4991 * [`SystemTime::duration_since`][] (renamed from `duration_from_earlier`)
4992 * [`SystemTime::elapsed`]
4993 * Various `Add`/`Sub` impls for `Time` and `SystemTime`
4994 * [`SystemTimeError`]
4995 * [`SystemTimeError::duration`]
4996 * Various impls for `SystemTimeError`
4998 * [`AddAssign`], [`SubAssign`], [`MulAssign`], [`DivAssign`],
4999 [`RemAssign`], [`BitAndAssign`], [`BitOrAssign`],
5000 [`BitXorAssign`], [`ShlAssign`], [`ShrAssign`].
5001 * [The `write!` and `writeln!` macros correctly emit errors if any of
5002 their arguments can't be formatted][1.8w].
5003 * [Various I/O functions support large files on 32-bit Linux][1.8l].
5004 * [The Unix-specific `raw` modules, which contain a number of
5005 redefined C types are deprecated][1.8r], including `os::raw::unix`,
5006 `os::raw::macos`, and `os::raw::linux`. These modules defined types
5007 such as `ino_t` and `dev_t`. The inconsistency of these definitions
5008 across platforms was making it difficult to implement `std`
5009 correctly. Those that need these definitions should use the `libc`
5011 * The Unix-specific `MetadataExt` traits, including
5012 `os::unix::fs::MetadataExt`, which expose values such as inode
5013 numbers [no longer return platform-specific types][1.8r], but
5014 instead return widened integers. [RFC 1415].
5015 * [`btree_set::{IntoIter, Iter, Range}` are covariant][1.8cv].
5016 * [Atomic loads and stores are not volatile][1.8a].
5017 * [All types in `sync::mpsc` implement `fmt::Debug`][1.8mp].
5022 * [Inlining hash functions lead to a 3% compile-time improvement in
5023 some workloads][1.8h].
5024 * When using jemalloc, its symbols are [unprefixed so that it
5025 overrides the libc malloc implementation][1.8h]. This means that for
5026 rustc, LLVM is now using jemalloc, which results in a 6%
5027 compile-time improvement on a specific workload.
5028 * [Avoid quadratic growth in function size due to cleanups][1.8cu].
5033 * [32-bit MSVC builds finally implement unwinding][1.8ms].
5034 i686-pc-windows-msvc is now considered a tier-1 platform.
5035 * [The `--print targets` flag prints a list of supported targets][1.8t].
5036 * [The `--print cfg` flag prints the `cfg`s defined for the current
5038 * [`rustc` can be built with an new Cargo-based build system, written
5039 in Rust][1.8b]. It will eventually replace Rust's Makefile-based
5040 build system. To enable it configure with `configure --rustbuild`.
5041 * [Errors for non-exhaustive `match` patterns now list up to 3 missing
5042 variants while also indicating the total number of missing variants
5043 if more than 3][1.8m].
5044 * [Executable stacks are disabled on Linux and BSD][1.8nx].
5045 * The Rust Project now publishes binary releases of the standard
5046 library for a number of tier-2 targets:
5047 `armv7-unknown-linux-gnueabihf`, `powerpc-unknown-linux-gnu`,
5048 `powerpc64-unknown-linux-gnu`, `powerpc64le-unknown-linux-gnu`
5049 `x86_64-rumprun-netbsd`. These can be installed with
5050 tools such as [multirust][1.8mr].
5055 * [`cargo init` creates a new Cargo project in the current
5056 directory][1.8ci]. It is otherwise like `cargo new`.
5057 * [Cargo has configuration keys for `-v` and
5058 `--color`][1.8cc]. `verbose` and `color`, respectively, go in the
5059 `[term]` section of `.cargo/config`.
5060 * [Configuration keys that evaluate to strings or integers can be set
5061 via environment variables][1.8ce]. For example the `build.jobs` key
5062 can be set via `CARGO_BUILD_JOBS`. Environment variables take
5063 precedence over config files.
5064 * [Target-specific dependencies support Rust `cfg` syntax for
5065 describing targets][1.8cfg] so that dependencies for multiple
5066 targets can be specified together. [RFC 1361].
5067 * [The environment variables `CARGO_TARGET_ROOT`, `RUSTC`, and
5068 `RUSTDOC` take precedence over the `build.target-dir`,
5069 `build.rustc`, and `build.rustdoc` configuration values][1.8cv].
5070 * [The child process tree is killed on Windows when Cargo is
5072 * [The `build.target` configuration value sets the target platform,
5073 like `--target`][1.8ct].
5078 * [Unstable compiler flags have been further restricted][1.8u]. Since
5079 1.0 `-Z` flags have been considered unstable, and other flags that
5080 were considered unstable additionally required passing `-Z
5081 unstable-options` to access. Unlike unstable language and library
5082 features though, these options have been accessible on the stable
5083 release channel. Going forward, *new unstable flags will not be
5084 available on the stable release channel*, and old unstable flags
5085 will warn about their usage. In the future, all unstable flags will
5086 be unavailable on the stable release channel.
5087 * [It is no longer possible to `match` on empty enum variants using
5088 the `Variant(..)` syntax][1.8v]. This has been a warning since 1.6.
5089 * The Unix-specific `MetadataExt` traits, including
5090 `os::unix::fs::MetadataExt`, which expose values such as inode
5091 numbers [no longer return platform-specific types][1.8r], but
5092 instead return widened integers. [RFC 1415].
5093 * [Modules sourced from the filesystem cannot appear within arbitrary
5094 blocks, but only within other modules][1.8mf].
5095 * [`--cfg` compiler flags are parsed strictly as identifiers][1.8c].
5096 * On Unix, [stack overflow triggers a runtime abort instead of a
5098 * [`Command::spawn` and its equivalents return an error if any of
5099 its command-line arguments contain interior `NUL`s][1.8n].
5100 * [Tuple and unit enum variants from other crates are in the type
5102 * [On Windows `rustc` emits `.lib` files for the `staticlib` library
5103 type instead of `.a` files][1.8st]. Additionally, for the MSVC
5104 toolchain, `rustc` emits import libraries named `foo.dll.lib`
5105 instead of `foo.lib`.
5108 [1.8a]: https://github.com/rust-lang/rust/pull/30962
5109 [1.8b]: https://github.com/rust-lang/rust/pull/31123
5110 [1.8c]: https://github.com/rust-lang/rust/pull/31530
5111 [1.8cc]: https://github.com/rust-lang/cargo/pull/2397
5112 [1.8ce]: https://github.com/rust-lang/cargo/pull/2398
5113 [1.8cf]: https://github.com/rust-lang/rust/pull/31278
5114 [1.8cfg]: https://github.com/rust-lang/cargo/pull/2328
5115 [1.8ci]: https://github.com/rust-lang/cargo/pull/2081
5116 [1.8ck]: https://github.com/rust-lang/cargo/pull/2370
5117 [1.8ct]: https://github.com/rust-lang/cargo/pull/2335
5118 [1.8cu]: https://github.com/rust-lang/rust/pull/31390
5119 [1.8cv]: https://github.com/rust-lang/cargo/issues/2365
5120 [1.8cv]: https://github.com/rust-lang/rust/pull/30998
5121 [1.8h]: https://github.com/rust-lang/rust/pull/31460
5122 [1.8l]: https://github.com/rust-lang/rust/pull/31668
5123 [1.8m]: https://github.com/rust-lang/rust/pull/31020
5124 [1.8mf]: https://github.com/rust-lang/rust/pull/31534
5125 [1.8mp]: https://github.com/rust-lang/rust/pull/30894
5126 [1.8mr]: https://users.rust-lang.org/t/multirust-0-8-with-cross-std-installation/4901
5127 [1.8ms]: https://github.com/rust-lang/rust/pull/30448
5128 [1.8n]: https://github.com/rust-lang/rust/pull/31056
5129 [1.8nx]: https://github.com/rust-lang/rust/pull/30859
5130 [1.8r]: https://github.com/rust-lang/rust/pull/31551
5131 [1.8so]: https://github.com/rust-lang/rust/pull/31333
5132 [1.8st]: https://github.com/rust-lang/rust/pull/29520
5133 [1.8t]: https://github.com/rust-lang/rust/pull/31358
5134 [1.8tn]: https://github.com/rust-lang/rust/pull/30882
5135 [1.8u]: https://github.com/rust-lang/rust/pull/31793
5136 [1.8v]: https://github.com/rust-lang/rust/pull/31757
5137 [1.8w]: https://github.com/rust-lang/rust/pull/31904
5138 [RFC 1361]: https://github.com/rust-lang/rfcs/blob/master/text/1361-cargo-cfg-dependencies.md
5139 [RFC 1415]: https://github.com/rust-lang/rfcs/blob/master/text/1415-trim-std-os.md
5140 [RFC 218]: https://github.com/rust-lang/rfcs/blob/master/text/0218-empty-struct-with-braces.md
5141 [RFC 953]: https://github.com/rust-lang/rfcs/blob/master/text/0953-op-assign.md
5142 [`AddAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.AddAssign.html
5143 [`BitAndAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitAndAssign.html
5144 [`BitOrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitOrAssign.html
5145 [`BitXorAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitXorAssign.html
5146 [`DivAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.DivAssign.html
5147 [`Instant::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.duration_since
5148 [`Instant::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.elapsed
5149 [`Instant::now`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.now
5150 [`MulAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.MulAssign.html
5151 [`Ref::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.Ref.html#method.map
5152 [`RefMut::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.RefMut.html#method.map
5153 [`RemAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.RemAssign.html
5154 [`ShlAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShlAssign.html
5155 [`ShrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShrAssign.html
5156 [`SubAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.SubAssign.html
5157 [`SystemTime::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.duration_since
5158 [`SystemTime::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.elapsed
5159 [`SystemTime::now`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.now
5160 [`SystemTimeError::duration`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html#method.duration
5161 [`SystemTimeError`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html
5162 [`UNIX_EPOCH`]: http://doc.rust-lang.org/nightly/std/time/constant.UNIX_EPOCH.html
5163 [`ptr::drop_in_place`]: http://doc.rust-lang.org/nightly/std/ptr/fn.drop_in_place.html
5164 [`str::EncodeUtf16`]: http://doc.rust-lang.org/nightly/std/str/struct.EncodeUtf16.html
5165 [`str::encode_utf16`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.encode_utf16
5166 [`time::Instant`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html
5167 [`time::SystemTime`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html
5170 Version 1.7.0 (2016-03-03)
5171 ==========================
5178 * [`Path::strip_prefix`][] (renamed from relative_from)
5179 * [`path::StripPrefixError`][] (new error type returned from strip_prefix)
5181 * [`Ipv4Addr::is_loopback`]
5182 * [`Ipv4Addr::is_private`]
5183 * [`Ipv4Addr::is_link_local`]
5184 * [`Ipv4Addr::is_multicast`]
5185 * [`Ipv4Addr::is_broadcast`]
5186 * [`Ipv4Addr::is_documentation`]
5188 * [`Ipv6Addr::is_unspecified`]
5189 * [`Ipv6Addr::is_loopback`]
5190 * [`Ipv6Addr::is_multicast`]
5193 * [`Vec::as_mut_slice`]
5195 * [`String::as_str`]
5196 * [`String::as_mut_str`]
5198 * `<[T]>::`[`clone_from_slice`], which now requires the two slices to
5200 * `<[T]>::`[`sort_by_key`]
5201 * checked, saturated, and overflowing operations
5202 * [`i32::checked_rem`], [`i32::checked_neg`], [`i32::checked_shl`], [`i32::checked_shr`]
5203 * [`i32::saturating_mul`]
5204 * [`i32::overflowing_add`], [`i32::overflowing_sub`], [`i32::overflowing_mul`], [`i32::overflowing_div`]
5205 * [`i32::overflowing_rem`], [`i32::overflowing_neg`], [`i32::overflowing_shl`], [`i32::overflowing_shr`]
5206 * [`u32::checked_rem`], [`u32::checked_neg`], [`u32::checked_shl`], [`u32::checked_shl`]
5207 * [`u32::saturating_mul`]
5208 * [`u32::overflowing_add`], [`u32::overflowing_sub`], [`u32::overflowing_mul`], [`u32::overflowing_div`]
5209 * [`u32::overflowing_rem`], [`u32::overflowing_neg`], [`u32::overflowing_shl`], [`u32::overflowing_shr`]
5210 * and checked, saturated, and overflowing operations for other primitive types
5212 * [`ffi::IntoStringError`]
5213 * [`CString::into_string`]
5214 * [`CString::into_bytes`]
5215 * [`CString::into_bytes_with_nul`]
5216 * `From<CString> for Vec<u8>`
5218 * [`IntoStringError::into_cstring`]
5219 * [`IntoStringError::utf8_error`]
5220 * `Error for IntoStringError`
5222 * [`std::hash::BuildHasher`]
5223 * [`BuildHasher::Hasher`]
5224 * [`BuildHasher::build_hasher`]
5225 * [`std::hash::BuildHasherDefault`]
5226 * [`HashMap::with_hasher`]
5227 * [`HashMap::with_capacity_and_hasher`]
5228 * [`HashSet::with_hasher`]
5229 * [`HashSet::with_capacity_and_hasher`]
5230 * [`std::collections::hash_map::RandomState`]
5231 * [`RandomState::new`]
5232 * [Validating UTF-8 is faster by a factor of between 7 and 14x for
5233 ASCII input][1.7utf8]. This means that creating `String`s and `str`s
5234 from bytes is faster.
5235 * [The performance of `LineWriter` (and thus `io::stdout`) was
5236 improved by using `memchr` to search for newlines][1.7m].
5237 * [`f32::to_degrees` and `f32::to_radians` are stable][1.7f]. The
5238 `f64` variants were stabilized previously.
5239 * [`BTreeMap` was rewritten to use less memory and improve the performance
5240 of insertion and iteration, the latter by as much as 5x][1.7bm].
5241 * [`BTreeSet` and its iterators, `Iter`, `IntoIter`, and `Range` are
5242 covariant over their contained type][1.7bt].
5243 * [`LinkedList` and its iterators, `Iter` and `IntoIter` are covariant
5244 over their contained type][1.7ll].
5245 * [`str::replace` now accepts a `Pattern`][1.7rp], like other string
5247 * [`Any` is implemented for unsized types][1.7a].
5248 * [`Hash` is implemented for `Duration`][1.7h].
5253 * [When running tests with `--test`, rustdoc will pass `--cfg`
5254 arguments to the compiler][1.7dt].
5255 * [The compiler is built with RPATH information by default][1.7rpa].
5256 This means that it will be possible to run `rustc` when installed in
5257 unusual configurations without configuring the dynamic linker search
5259 * [`rustc` passes `--enable-new-dtags` to GNU ld][1.7dta]. This makes
5260 any RPATH entries (emitted with `-C rpath`) *not* take precedence
5261 over `LD_LIBRARY_PATH`.
5266 * [`cargo rustc` accepts a `--profile` flag that runs `rustc` under
5267 any of the compilation profiles, 'dev', 'bench', or 'test'][1.7cp].
5268 * [The `rerun-if-changed` build script directive no longer causes the
5269 build script to incorrectly run twice in certain scenarios][1.7rr].
5274 * Soundness fixes to the interactions between associated types and
5275 lifetimes, specified in [RFC 1214], [now generate errors][1.7sf] for
5276 code that violates the new rules. This is a significant change that
5277 is known to break existing code, so it has emitted warnings for the
5278 new error cases since 1.4 to give crate authors time to adapt. The
5279 details of what is changing are subtle; read the RFC for more.
5280 * [Several bugs in the compiler's visibility calculations were
5281 fixed][1.7v]. Since this was found to break significant amounts of
5282 code, the new errors will be emitted as warnings for several release
5283 cycles, under the `private_in_public` lint.
5284 * Defaulted type parameters were accidentally accepted in positions
5285 that were not intended. In this release, [defaulted type parameters
5286 appearing outside of type definitions will generate a
5287 warning][1.7d], which will become an error in future releases.
5288 * [Parsing "." as a float results in an error instead of 0][1.7p].
5289 That is, `".".parse::<f32>()` returns `Err`, not `Ok(0.0)`.
5290 * [Borrows of closure parameters may not outlive the closure][1.7bc].
5292 [1.7a]: https://github.com/rust-lang/rust/pull/30928
5293 [1.7bc]: https://github.com/rust-lang/rust/pull/30341
5294 [1.7bm]: https://github.com/rust-lang/rust/pull/30426
5295 [1.7bt]: https://github.com/rust-lang/rust/pull/30998
5296 [1.7cp]: https://github.com/rust-lang/cargo/pull/2224
5297 [1.7d]: https://github.com/rust-lang/rust/pull/30724
5298 [1.7dt]: https://github.com/rust-lang/rust/pull/30372
5299 [1.7dta]: https://github.com/rust-lang/rust/pull/30394
5300 [1.7f]: https://github.com/rust-lang/rust/pull/30672
5301 [1.7h]: https://github.com/rust-lang/rust/pull/30818
5302 [1.7ll]: https://github.com/rust-lang/rust/pull/30663
5303 [1.7m]: https://github.com/rust-lang/rust/pull/30381
5304 [1.7p]: https://github.com/rust-lang/rust/pull/30681
5305 [1.7rp]: https://github.com/rust-lang/rust/pull/29498
5306 [1.7rpa]: https://github.com/rust-lang/rust/pull/30353
5307 [1.7rr]: https://github.com/rust-lang/cargo/pull/2279
5308 [1.7sf]: https://github.com/rust-lang/rust/pull/30389
5309 [1.7utf8]: https://github.com/rust-lang/rust/pull/30740
5310 [1.7v]: https://github.com/rust-lang/rust/pull/29973
5311 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
5312 [`BuildHasher::Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
5313 [`BuildHasher::build_hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html#tymethod.build_hasher
5314 [`CString::into_bytes_with_nul`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes_with_nul
5315 [`CString::into_bytes`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes
5316 [`CString::into_string`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_string
5317 [`HashMap::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_capacity_and_hasher
5318 [`HashMap::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_hasher
5319 [`HashSet::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_capacity_and_hasher
5320 [`HashSet::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_hasher
5321 [`IntoStringError::into_cstring`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.into_cstring
5322 [`IntoStringError::utf8_error`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.utf8_error
5323 [`Ipv4Addr::is_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_broadcast
5324 [`Ipv4Addr::is_documentation`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_documentation
5325 [`Ipv4Addr::is_link_local`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_link_local
5326 [`Ipv4Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_loopback
5327 [`Ipv4Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_multicast
5328 [`Ipv4Addr::is_private`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_private
5329 [`Ipv6Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_loopback
5330 [`Ipv6Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_multicast
5331 [`Ipv6Addr::is_unspecified`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_unspecified
5332 [`Path::strip_prefix`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.strip_prefix
5333 [`RandomState::new`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html#method.new
5334 [`String::as_mut_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_mut_str
5335 [`String::as_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_str
5336 [`Vec::as_mut_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_mut_slice
5337 [`Vec::as_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_slice
5338 [`clone_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.clone_from_slice
5339 [`ffi::IntoStringError`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html
5340 [`i32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_neg
5341 [`i32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_rem
5342 [`i32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shl
5343 [`i32::checked_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shr
5344 [`i32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_add
5345 [`i32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_div
5346 [`i32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_mul
5347 [`i32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_neg
5348 [`i32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_rem
5349 [`i32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shl
5350 [`i32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shr
5351 [`i32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_sub
5352 [`i32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.saturating_mul
5353 [`path::StripPrefixError`]: http://doc.rust-lang.org/nightly/std/path/struct.StripPrefixError.html
5354 [`sort_by_key`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.sort_by_key
5355 [`std::collections::hash_map::RandomState`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html
5356 [`std::hash::BuildHasherDefault`]: http://doc.rust-lang.org/nightly/std/hash/struct.BuildHasherDefault.html
5357 [`std::hash::BuildHasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html
5358 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
5359 [`u32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_rem
5360 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
5361 [`u32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_shl
5362 [`u32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_add
5363 [`u32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_div
5364 [`u32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_mul
5365 [`u32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_neg
5366 [`u32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_rem
5367 [`u32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shl
5368 [`u32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shr
5369 [`u32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_sub
5370 [`u32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.saturating_mul
5373 Version 1.6.0 (2016-01-21)
5374 ==========================
5379 * The `#![no_std]` attribute causes a crate to not be linked to the
5380 standard library, but only the [core library][1.6co], as described
5381 in [RFC 1184]. The core library defines common types and traits but
5382 has no platform dependencies whatsoever, and is the basis for Rust
5383 software in environments that cannot support a full port of the
5384 standard library, such as operating systems. Most of the core
5385 library is now stable.
5391 [`Read::read_exact`],
5392 [`ErrorKind::UnexpectedEof`][] (renamed from `UnexpectedEOF`),
5393 [`fs::DirBuilder`], [`fs::DirBuilder::new`],
5394 [`fs::DirBuilder::recursive`], [`fs::DirBuilder::create`],
5395 [`os::unix::fs::DirBuilderExt`],
5396 [`os::unix::fs::DirBuilderExt::mode`], [`vec::Drain`],
5397 [`vec::Vec::drain`], [`string::Drain`], [`string::String::drain`],
5398 [`vec_deque::Drain`], [`vec_deque::VecDeque::drain`],
5399 [`collections::hash_map::Drain`],
5400 [`collections::hash_map::HashMap::drain`],
5401 [`collections::hash_set::Drain`],
5402 [`collections::hash_set::HashSet::drain`],
5403 [`collections::binary_heap::Drain`],
5404 [`collections::binary_heap::BinaryHeap::drain`],
5405 [`Vec::extend_from_slice`][] (renamed from `push_all`),
5406 [`Mutex::get_mut`], [`Mutex::into_inner`], [`RwLock::get_mut`],
5407 [`RwLock::into_inner`],
5408 [`Iterator::min_by_key`][] (renamed from `min_by`),
5409 [`Iterator::max_by_key`][] (renamed from `max_by`).
5410 * The [core library][1.6co] is stable, as are most of its APIs.
5411 * [The `assert_eq!` macro supports arguments that don't implement
5412 `Sized`][1.6ae], such as arrays. In this way it behaves more like
5414 * Several timer functions that take duration in milliseconds [are
5415 deprecated in favor of those that take `Duration`][1.6ms]. These
5416 include `Condvar::wait_timeout_ms`, `thread::sleep_ms`, and
5417 `thread::park_timeout_ms`.
5418 * The algorithm by which `Vec` reserves additional elements was
5419 [tweaked to not allocate excessive space][1.6a] while still growing
5421 * `From` conversions are [implemented from integers to floats][1.6f]
5422 in cases where the conversion is lossless. Thus they are not
5423 implemented for 32-bit ints to `f32`, nor for 64-bit ints to `f32`
5424 or `f64`. They are also not implemented for `isize` and `usize`
5425 because the implementations would be platform-specific. `From` is
5426 also implemented from `f32` to `f64`.
5427 * `From<&Path>` and `From<PathBuf>` are implemented for `Cow<Path>`.
5428 * `From<T>` is implemented for `Box<T>`, `Rc<T>` and `Arc<T>`.
5429 * `IntoIterator` is implemented for `&PathBuf` and `&Path`.
5430 * [`BinaryHeap` was refactored][1.6bh] for modest performance
5432 * Sorting slices that are already sorted [is 50% faster in some
5438 * Cargo will look in `$CARGO_HOME/bin` for subcommands [by default][1.6c].
5439 * Cargo build scripts can specify their dependencies by emitting the
5440 [`rerun-if-changed`][1.6rr] key.
5441 * crates.io will reject publication of crates with dependencies that
5442 have a wildcard version constraint. Crates with wildcard
5443 dependencies were seen to cause a variety of problems, as described
5444 in [RFC 1241]. Since 1.5 publication of such crates has emitted a
5446 * `cargo clean` [accepts a `--release` flag][1.6cc] to clean the
5447 release folder. A variety of artifacts that Cargo failed to clean
5448 are now correctly deleted.
5453 * The `unreachable_code` lint [warns when a function call's argument
5455 * The parser indicates [failures that may be caused by
5456 confusingly-similar Unicode characters][1.6uc]
5457 * Certain macro errors [are reported at definition time][1.6m], not
5463 * The compiler no longer makes use of the [`RUST_PATH`][1.6rp]
5464 environment variable when locating crates. This was a pre-cargo
5465 feature for integrating with the package manager that was
5466 accidentally never removed.
5467 * [A number of bugs were fixed in the privacy checker][1.6p] that
5468 could cause previously-accepted code to break.
5469 * [Modules and unit/tuple structs may not share the same name][1.6ts].
5470 * [Bugs in pattern matching unit structs were fixed][1.6us]. The tuple
5471 struct pattern syntax (`Foo(..)`) can no longer be used to match
5472 unit structs. This is a warning now, but will become an error in
5473 future releases. Patterns that share the same name as a const are
5475 * A bug was fixed that causes [rustc not to apply default type
5476 parameters][1.6xc] when resolving certain method implementations of
5477 traits defined in other crates.
5479 [1.6a]: https://github.com/rust-lang/rust/pull/29454
5480 [1.6ae]: https://github.com/rust-lang/rust/pull/29770
5481 [1.6bh]: https://github.com/rust-lang/rust/pull/29811
5482 [1.6c]: https://github.com/rust-lang/cargo/pull/2192
5483 [1.6cc]: https://github.com/rust-lang/cargo/pull/2131
5484 [1.6co]: http://doc.rust-lang.org/core/index.html
5485 [1.6dv]: https://github.com/rust-lang/rust/pull/30000
5486 [1.6f]: https://github.com/rust-lang/rust/pull/29129
5487 [1.6m]: https://github.com/rust-lang/rust/pull/29828
5488 [1.6ms]: https://github.com/rust-lang/rust/pull/29604
5489 [1.6p]: https://github.com/rust-lang/rust/pull/29726
5490 [1.6rp]: https://github.com/rust-lang/rust/pull/30034
5491 [1.6rr]: https://github.com/rust-lang/cargo/pull/2134
5492 [1.6s]: https://github.com/rust-lang/rust/pull/29675
5493 [1.6ts]: https://github.com/rust-lang/rust/issues/21546
5494 [1.6uc]: https://github.com/rust-lang/rust/pull/29837
5495 [1.6us]: https://github.com/rust-lang/rust/pull/29383
5496 [1.6xc]: https://github.com/rust-lang/rust/issues/30123
5497 [RFC 1184]: https://github.com/rust-lang/rfcs/blob/master/text/1184-stabilize-no_std.md
5498 [RFC 1241]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
5499 [`ErrorKind::UnexpectedEof`]: http://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html#variant.UnexpectedEof
5500 [`Iterator::max_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.max_by_key
5501 [`Iterator::min_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.min_by_key
5502 [`Mutex::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.get_mut
5503 [`Mutex::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.into_inner
5504 [`Read::read_exact`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_exact
5505 [`RwLock::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.get_mut
5506 [`RwLock::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.into_inner
5507 [`Vec::extend_from_slice`]: http://doc.rust-lang.org/nightly/collections/vec/struct.Vec.html#method.extend_from_slice
5508 [`collections::binary_heap::BinaryHeap::drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.BinaryHeap.html#method.drain
5509 [`collections::binary_heap::Drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.Drain.html
5510 [`collections::hash_map::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.Drain.html
5511 [`collections::hash_map::HashMap::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.HashMap.html#method.drain
5512 [`collections::hash_set::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.Drain.html
5513 [`collections::hash_set::HashSet::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.HashSet.html#method.drain
5514 [`fs::DirBuilder::create`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.create
5515 [`fs::DirBuilder::new`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.new
5516 [`fs::DirBuilder::recursive`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.recursive
5517 [`fs::DirBuilder`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html
5518 [`os::unix::fs::DirBuilderExt::mode`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html#tymethod.mode
5519 [`os::unix::fs::DirBuilderExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html
5520 [`string::Drain`]: http://doc.rust-lang.org/nightly/std/string/struct.Drain.html
5521 [`string::String::drain`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.drain
5522 [`vec::Drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Drain.html
5523 [`vec::Vec::drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.drain
5524 [`vec_deque::Drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.Drain.html
5525 [`vec_deque::VecDeque::drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.VecDeque.html#method.drain
5528 Version 1.5.0 (2015-12-10)
5529 ==========================
5531 * ~700 changes, numerous bugfixes
5537 [`BinaryHeap::from`], [`BinaryHeap::into_sorted_vec`],
5538 [`BinaryHeap::into_vec`], [`Condvar::wait_timeout`],
5539 [`FileTypeExt::is_block_device`], [`FileTypeExt::is_char_device`],
5540 [`FileTypeExt::is_fifo`], [`FileTypeExt::is_socket`],
5541 [`FileTypeExt`], [`Formatter::alternate`], [`Formatter::fill`],
5542 [`Formatter::precision`], [`Formatter::sign_aware_zero_pad`],
5543 [`Formatter::sign_minus`], [`Formatter::sign_plus`],
5544 [`Formatter::width`], [`Iterator::cmp`], [`Iterator::eq`],
5545 [`Iterator::ge`], [`Iterator::gt`], [`Iterator::le`],
5546 [`Iterator::lt`], [`Iterator::ne`], [`Iterator::partial_cmp`],
5547 [`Path::canonicalize`], [`Path::exists`], [`Path::is_dir`],
5548 [`Path::is_file`], [`Path::metadata`], [`Path::read_dir`],
5549 [`Path::read_link`], [`Path::symlink_metadata`],
5550 [`Utf8Error::valid_up_to`], [`Vec::resize`],
5551 [`VecDeque::as_mut_slices`], [`VecDeque::as_slices`],
5552 [`VecDeque::insert`], [`VecDeque::shrink_to_fit`],
5553 [`VecDeque::swap_remove_back`], [`VecDeque::swap_remove_front`],
5554 [`slice::split_first_mut`], [`slice::split_first`],
5555 [`slice::split_last_mut`], [`slice::split_last`],
5556 [`char::from_u32_unchecked`], [`fs::canonicalize`],
5557 [`str::MatchIndices`], [`str::RMatchIndices`],
5558 [`str::match_indices`], [`str::rmatch_indices`],
5559 [`str::slice_mut_unchecked`], [`string::ParseError`].
5560 * Rust applications hosted on crates.io can be installed locally to
5561 `~/.cargo/bin` with the [`cargo install`] command. Among other
5562 things this makes it easier to augment Cargo with new subcommands:
5563 when a binary named e.g. `cargo-foo` is found in `$PATH` it can be
5564 invoked as `cargo foo`.
5565 * Crates with wildcard (`*`) dependencies will [emit warnings when
5566 published][1.5w]. In 1.6 it will no longer be possible to publish
5567 crates with wildcard dependencies.
5572 * The rules determining when a particular lifetime must outlive
5573 a particular value (known as '[dropck]') have been [modified
5574 to not rely on parametricity][1.5p].
5575 * [Implementations of `AsRef` and `AsMut` were added to `Box`, `Rc`,
5576 and `Arc`][1.5a]. Because these smart pointer types implement
5577 `Deref`, this causes breakage in cases where the interior type
5578 contains methods of the same name.
5579 * [Correct a bug in Rc/Arc][1.5c] that caused [dropck] to be unaware
5580 that they could drop their content. Soundness fix.
5581 * All method invocations are [properly checked][1.5wf1] for
5582 [well-formedness][1.5wf2]. Soundness fix.
5583 * Traits whose supertraits contain `Self` are [not object
5584 safe][1.5o]. Soundness fix.
5585 * Target specifications support a [`no_default_libraries`][1.5nd]
5586 setting that controls whether `-nodefaultlibs` is passed to the
5587 linker, and in turn the `is_like_windows` setting no longer affects
5588 the `-nodefaultlibs` flag.
5589 * `#[derive(Show)]`, long-deprecated, [has been removed][1.5ds].
5590 * The `#[inline]` and `#[repr]` attributes [can only appear
5591 in valid locations][1.5at].
5592 * Native libraries linked from the local crate are [passed to
5593 the linker before native libraries from upstream crates][1.5nl].
5594 * Two rarely-used attributes, `#[no_debug]` and
5595 `#[omit_gdb_pretty_printer_section]` [are feature gated][1.5fg].
5596 * Negation of unsigned integers, which has been a warning for
5597 several releases, [is now behind a feature gate and will
5598 generate errors][1.5nu].
5599 * The parser accidentally accepted visibility modifiers on
5600 enum variants, a bug [which has been fixed][1.5ev].
5601 * [A bug was fixed that allowed `use` statements to import unstable
5607 * When evaluating expressions at compile-time that are not
5608 compile-time constants (const-evaluating expressions in non-const
5609 contexts), incorrect code such as overlong bitshifts and arithmetic
5610 overflow will [generate a warning instead of an error][1.5ce],
5611 delaying the error until runtime. This will allow the
5612 const-evaluator to be expanded in the future backwards-compatibly.
5613 * The `improper_ctypes` lint [no longer warns about using `isize` and
5614 `usize` in FFI][1.5ict].
5619 * `Arc<T>` and `Rc<T>` are [covariant with respect to `T` instead of
5621 * `Default` is [implemented for mutable slices][1.5d].
5622 * `FromStr` is [implemented for `SockAddrV4` and `SockAddrV6`][1.5s].
5623 * There are now `From` conversions [between floating point
5624 types][1.5f] where the conversions are lossless.
5625 * There are now `From` conversions [between integer types][1.5i] where
5626 the conversions are lossless.
5627 * [`fs::Metadata` implements `Clone`][1.5fs].
5628 * The `parse` method [accepts a leading "+" when parsing
5630 * [`AsMut` is implemented for `Vec`][1.5am].
5631 * The `clone_from` implementations for `String` and `BinaryHeap` [have
5632 been optimized][1.5cf] and no longer rely on the default impl.
5633 * The `extern "Rust"`, `extern "C"`, `unsafe extern "Rust"` and
5634 `unsafe extern "C"` function types now [implement `Clone`,
5635 `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and
5636 `fmt::Debug` for up to 12 arguments][1.5fp].
5637 * [Dropping `Vec`s is much faster in unoptimized builds when the
5638 element types don't implement `Drop`][1.5dv].
5639 * A bug that caused in incorrect behavior when [combining `VecDeque`
5640 with zero-sized types][1.5vdz] was resolved.
5641 * [`PartialOrd` for slices is faster][1.5po].
5646 * [Crate metadata size was reduced by 20%][1.5md].
5647 * [Improvements to code generation reduced the size of libcore by 3.3
5648 MB and rustc's memory usage by 18MB][1.5m].
5649 * [Improvements to deref translation increased performance in
5650 unoptimized builds][1.5dr].
5651 * Various errors in trait resolution [are deduplicated to only be
5652 reported once][1.5te].
5653 * Rust has preliminary [support for rumprun kernels][1.5rr].
5654 * Rust has preliminary [support for NetBSD on amd64][1.5na].
5656 [1.5use]: https://github.com/rust-lang/rust/pull/28364
5657 [1.5po]: https://github.com/rust-lang/rust/pull/28436
5658 [1.5ev]: https://github.com/rust-lang/rust/pull/28442
5659 [1.5nu]: https://github.com/rust-lang/rust/pull/28468
5660 [1.5dr]: https://github.com/rust-lang/rust/pull/28491
5661 [1.5vdz]: https://github.com/rust-lang/rust/pull/28494
5662 [1.5md]: https://github.com/rust-lang/rust/pull/28521
5663 [1.5fg]: https://github.com/rust-lang/rust/pull/28522
5664 [1.5dv]: https://github.com/rust-lang/rust/pull/28531
5665 [1.5na]: https://github.com/rust-lang/rust/pull/28543
5666 [1.5fp]: https://github.com/rust-lang/rust/pull/28560
5667 [1.5rr]: https://github.com/rust-lang/rust/pull/28593
5668 [1.5cf]: https://github.com/rust-lang/rust/pull/28602
5669 [1.5nl]: https://github.com/rust-lang/rust/pull/28605
5670 [1.5te]: https://github.com/rust-lang/rust/pull/28645
5671 [1.5at]: https://github.com/rust-lang/rust/pull/28650
5672 [1.5am]: https://github.com/rust-lang/rust/pull/28663
5673 [1.5m]: https://github.com/rust-lang/rust/pull/28778
5674 [1.5ict]: https://github.com/rust-lang/rust/pull/28779
5675 [1.5a]: https://github.com/rust-lang/rust/pull/28811
5676 [1.5pi]: https://github.com/rust-lang/rust/pull/28826
5677 [1.5ce]: https://github.com/rust-lang/rfcs/blob/master/text/1229-compile-time-asserts.md
5678 [1.5p]: https://github.com/rust-lang/rfcs/blob/master/text/1238-nonparametric-dropck.md
5679 [1.5i]: https://github.com/rust-lang/rust/pull/28921
5680 [1.5fs]: https://github.com/rust-lang/rust/pull/29021
5681 [1.5f]: https://github.com/rust-lang/rust/pull/29129
5682 [1.5ds]: https://github.com/rust-lang/rust/pull/29148
5683 [1.5s]: https://github.com/rust-lang/rust/pull/29190
5684 [1.5d]: https://github.com/rust-lang/rust/pull/29245
5685 [1.5o]: https://github.com/rust-lang/rust/pull/29259
5686 [1.5nd]: https://github.com/rust-lang/rust/pull/28578
5687 [1.5wf2]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
5688 [1.5wf1]: https://github.com/rust-lang/rust/pull/28669
5689 [dropck]: https://doc.rust-lang.org/nightly/nomicon/dropck.html
5690 [1.5c]: https://github.com/rust-lang/rust/pull/29110
5691 [1.5w]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
5692 [`cargo install`]: https://github.com/rust-lang/rfcs/blob/master/text/1200-cargo-install.md
5693 [`BinaryHeap::from`]: http://doc.rust-lang.org/nightly/std/convert/trait.From.html#method.from
5694 [`BinaryHeap::into_sorted_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_sorted_vec
5695 [`BinaryHeap::into_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_vec
5696 [`Condvar::wait_timeout`]: http://doc.rust-lang.org/nightly/std/sync/struct.Condvar.html#method.wait_timeout
5697 [`FileTypeExt::is_block_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_block_device
5698 [`FileTypeExt::is_char_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_char_device
5699 [`FileTypeExt::is_fifo`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_fifo
5700 [`FileTypeExt::is_socket`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_socket
5701 [`FileTypeExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html
5702 [`Formatter::alternate`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.alternate
5703 [`Formatter::fill`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.fill
5704 [`Formatter::precision`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.precision
5705 [`Formatter::sign_aware_zero_pad`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_aware_zero_pad
5706 [`Formatter::sign_minus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_minus
5707 [`Formatter::sign_plus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_plus
5708 [`Formatter::width`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.width
5709 [`Iterator::cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.cmp
5710 [`Iterator::eq`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.eq
5711 [`Iterator::ge`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ge
5712 [`Iterator::gt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.gt
5713 [`Iterator::le`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.le
5714 [`Iterator::lt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.lt
5715 [`Iterator::ne`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ne
5716 [`Iterator::partial_cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.partial_cmp
5717 [`Path::canonicalize`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.canonicalize
5718 [`Path::exists`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.exists
5719 [`Path::is_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_dir
5720 [`Path::is_file`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_file
5721 [`Path::metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.metadata
5722 [`Path::read_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_dir
5723 [`Path::read_link`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_link
5724 [`Path::symlink_metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.symlink_metadata
5725 [`Utf8Error::valid_up_to`]: http://doc.rust-lang.org/nightly/core/str/struct.Utf8Error.html#method.valid_up_to
5726 [`Vec::resize`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.resize
5727 [`VecDeque::as_mut_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_mut_slices
5728 [`VecDeque::as_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_slices
5729 [`VecDeque::insert`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.insert
5730 [`VecDeque::shrink_to_fit`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.shrink_to_fit
5731 [`VecDeque::swap_remove_back`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_back
5732 [`VecDeque::swap_remove_front`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_front
5733 [`slice::split_first_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first_mut
5734 [`slice::split_first`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first
5735 [`slice::split_last_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last_mut
5736 [`slice::split_last`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last
5737 [`char::from_u32_unchecked`]: http://doc.rust-lang.org/nightly/std/char/fn.from_u32_unchecked.html
5738 [`fs::canonicalize`]: http://doc.rust-lang.org/nightly/std/fs/fn.canonicalize.html
5739 [`str::MatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.MatchIndices.html
5740 [`str::RMatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.RMatchIndices.html
5741 [`str::match_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.match_indices
5742 [`str::rmatch_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatch_indices
5743 [`str::slice_mut_unchecked`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.slice_mut_unchecked
5744 [`string::ParseError`]: http://doc.rust-lang.org/nightly/std/string/enum.ParseError.html
5746 Version 1.4.0 (2015-10-29)
5747 ==========================
5749 * ~1200 changes, numerous bugfixes
5754 * Windows builds targeting the 64-bit MSVC ABI and linker (instead of
5755 GNU) are now supported and recommended for use.
5760 * [Several changes have been made to fix type soundness and improve
5761 the behavior of associated types][sound]. See [RFC 1214]. Although
5762 we have mostly introduced these changes as warnings this release, to
5763 become errors next release, there are still some scenarios that will
5764 see immediate breakage.
5765 * [The `str::lines` and `BufRead::lines` iterators treat `\r\n` as
5766 line breaks in addition to `\n`][crlf].
5767 * [Loans of `'static` lifetime extend to the end of a function][stat].
5768 * [`str::parse` no longer introduces avoidable rounding error when
5769 parsing floating point numbers. Together with earlier changes to
5770 float formatting/output, "round trips" like f.to_string().parse()
5771 now preserve the value of f exactly. Additionally, leading plus
5772 signs are now accepted][fp3].
5778 * `use` statements that import multiple items [can now rename
5779 them][i], as in `use foo::{bar as kitten, baz as puppy}`.
5780 * [Binops work correctly on fat pointers][binfat].
5781 * `pub extern crate`, which does not behave as expected, [issues a
5782 warning][pec] until a better solution is found.
5787 * [Many APIs were stabilized][stab]: `<Box<str>>::into_string`,
5788 [`Arc::downgrade`], [`Arc::get_mut`], [`Arc::make_mut`],
5789 [`Arc::try_unwrap`], [`Box::from_raw`], [`Box::into_raw`], [`CStr::to_str`],
5790 [`CStr::to_string_lossy`], [`CString::from_raw`], [`CString::into_raw`],
5791 [`IntoRawFd::into_raw_fd`], [`IntoRawFd`],
5792 `IntoRawHandle::into_raw_handle`, `IntoRawHandle`,
5793 `IntoRawSocket::into_raw_socket`, `IntoRawSocket`, [`Rc::downgrade`],
5794 [`Rc::get_mut`], [`Rc::make_mut`], [`Rc::try_unwrap`], [`Result::expect`],
5795 [`String::into_boxed_str`], [`TcpStream::read_timeout`],
5796 [`TcpStream::set_read_timeout`], [`TcpStream::set_write_timeout`],
5797 [`TcpStream::write_timeout`], [`UdpSocket::read_timeout`],
5798 [`UdpSocket::set_read_timeout`], [`UdpSocket::set_write_timeout`],
5799 [`UdpSocket::write_timeout`], `Vec::append`, `Vec::split_off`,
5800 [`VecDeque::append`], [`VecDeque::retain`], [`VecDeque::split_off`],
5801 [`rc::Weak::upgrade`], [`rc::Weak`], [`slice::Iter::as_slice`],
5802 [`slice::IterMut::into_slice`], [`str::CharIndices::as_str`],
5803 [`str::Chars::as_str`], [`str::split_at_mut`], [`str::split_at`],
5804 [`sync::Weak::upgrade`], [`sync::Weak`], [`thread::park_timeout`],
5806 * [Some APIs were deprecated][dep]: `BTreeMap::with_b`,
5807 `BTreeSet::with_b`, `Option::as_mut_slice`, `Option::as_slice`,
5808 `Result::as_mut_slice`, `Result::as_slice`, `f32::from_str_radix`,
5809 `f64::from_str_radix`.
5810 * [Reverse-searching strings is faster with the 'two-way'
5812 * [`std::io::copy` allows `?Sized` arguments][cc].
5813 * The `Windows`, `Chunks`, and `ChunksMut` iterators over slices all
5814 [override `count`, `nth` and `last` with an O(1)
5815 implementation][it].
5816 * [`Default` is implemented for arrays up to `[T; 32]`][d].
5817 * [`IntoRawFd` has been added to the Unix-specific prelude,
5818 `IntoRawSocket` and `IntoRawHandle` to the Windows-specific
5820 * [`Extend<String>` and `FromIterator<String` are both implemented for
5822 * [`IntoIterator` is implemented for references to `Option` and
5824 * [`HashMap` and `HashSet` implement `Extend<&T>` where `T:
5825 Copy`][ext] as part of [RFC 839]. This will cause type inference
5826 breakage in rare situations.
5827 * [`BinaryHeap` implements `Debug`][bh2].
5828 * [`Borrow` and `BorrowMut` are implemented for fixed-size
5830 * [`extern fn`s with the "Rust" and "C" ABIs implement common
5831 traits including `Eq`, `Ord`, `Debug`, `Hash`][fp].
5832 * [String comparison is faster][faststr].
5833 * `&mut T` where `T: std::fmt::Write` [also implements
5834 `std::fmt::Write`][mutw].
5835 * [A stable regression in `VecDeque::push_back` and other
5836 capacity-altering methods that caused panics for zero-sized types
5838 * [Function pointers implement traits for up to 12 parameters][fp2].
5843 * The compiler [no longer uses the 'morestack' feature to prevent
5844 stack overflow][mm]. Instead it uses guard pages and stack
5845 probes (though stack probes are not yet implemented on any platform
5847 * [The compiler matches traits faster when projections are involved][p].
5848 * The 'improper_ctypes' lint [no longer warns about use of `isize` and
5850 * [Cargo now displays useful information about what its doing during
5851 `cargo update`][cu].
5853 [`Arc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.downgrade
5854 [`Arc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.make_mut
5855 [`Arc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.get_mut
5856 [`Arc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.try_unwrap
5857 [`Box::from_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.from_raw
5858 [`Box::into_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.into_raw
5859 [`CStr::to_str`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_str
5860 [`CStr::to_string_lossy`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_string_lossy
5861 [`CString::from_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.from_raw
5862 [`CString::into_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_raw
5863 [`IntoRawFd::into_raw_fd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html#tymethod.into_raw_fd
5864 [`IntoRawFd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html
5865 [`Rc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.downgrade
5866 [`Rc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.get_mut
5867 [`Rc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.make_mut
5868 [`Rc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.try_unwrap
5869 [`Result::expect`]: http://doc.rust-lang.org/nightly/core/result/enum.Result.html#method.expect
5870 [`String::into_boxed_str`]: http://doc.rust-lang.org/nightly/collections/string/struct.String.html#method.into_boxed_str
5871 [`TcpStream::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
5872 [`TcpStream::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
5873 [`TcpStream::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
5874 [`TcpStream::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
5875 [`UdpSocket::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
5876 [`UdpSocket::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
5877 [`UdpSocket::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
5878 [`UdpSocket::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
5879 [`VecDeque::append`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.append
5880 [`VecDeque::retain`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.retain
5881 [`VecDeque::split_off`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.split_off
5882 [`rc::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html#method.upgrade
5883 [`rc::Weak`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html
5884 [`slice::Iter::as_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.Iter.html#method.as_slice
5885 [`slice::IterMut::into_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.IterMut.html#method.into_slice
5886 [`str::CharIndices::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.CharIndices.html#method.as_str
5887 [`str::Chars::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.Chars.html#method.as_str
5888 [`str::split_at_mut`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at_mut
5889 [`str::split_at`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at
5890 [`sync::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html#method.upgrade
5891 [`sync::Weak`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html
5892 [`thread::park_timeout`]: http://doc.rust-lang.org/nightly/std/thread/fn.park_timeout.html
5893 [`thread::sleep`]: http://doc.rust-lang.org/nightly/std/thread/fn.sleep.html
5894 [bh2]: https://github.com/rust-lang/rust/pull/28156
5895 [binfat]: https://github.com/rust-lang/rust/pull/28270
5896 [bm]: https://github.com/rust-lang/rust/pull/28197
5897 [cc]: https://github.com/rust-lang/rust/pull/27531
5898 [crlf]: https://github.com/rust-lang/rust/pull/28034
5899 [cu]: https://github.com/rust-lang/cargo/pull/1931
5900 [d]: https://github.com/rust-lang/rust/pull/27825
5901 [dep]: https://github.com/rust-lang/rust/pull/28339
5902 [es]: https://github.com/rust-lang/rust/pull/27956
5903 [ext]: https://github.com/rust-lang/rust/pull/28094
5904 [faststr]: https://github.com/rust-lang/rust/pull/28338
5905 [ffi]: https://github.com/rust-lang/rust/pull/28779
5906 [fp]: https://github.com/rust-lang/rust/pull/28268
5907 [fp2]: https://github.com/rust-lang/rust/pull/28560
5908 [fp3]: https://github.com/rust-lang/rust/pull/27307
5909 [i]: https://github.com/rust-lang/rust/pull/27451
5910 [into2]: https://github.com/rust-lang/rust/pull/28039
5911 [it]: https://github.com/rust-lang/rust/pull/27652
5912 [mm]: https://github.com/rust-lang/rust/pull/27338
5913 [mutw]: https://github.com/rust-lang/rust/pull/28368
5914 [sound]: https://github.com/rust-lang/rust/pull/27641
5915 [p]: https://github.com/rust-lang/rust/pull/27866
5916 [pec]: https://github.com/rust-lang/rust/pull/28486
5917 [pr]: https://github.com/rust-lang/rust/pull/27896
5918 [RFC 839]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
5919 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
5920 [s]: https://github.com/rust-lang/rust/pull/27474
5921 [stab]: https://github.com/rust-lang/rust/pull/28339
5922 [stat]: https://github.com/rust-lang/rust/pull/28321
5923 [vd]: https://github.com/rust-lang/rust/pull/28494
5925 Version 1.3.0 (2015-09-17)
5926 ==============================
5928 * ~900 changes, numerous bugfixes
5933 * The [new object lifetime defaults][nold] have been [turned
5934 on][nold2] after a cycle of warnings about the change. Now types
5935 like `&'a Box<Trait>` (or `&'a Rc<Trait>`, etc) will change from
5936 being interpreted as `&'a Box<Trait+'a>` to `&'a
5937 Box<Trait+'static>`.
5938 * [The Rustonomicon][nom] is a new book in the official documentation
5939 that dives into writing unsafe Rust.
5940 * The [`Duration`] API, [has been stabilized][ds]. This basic unit of
5941 timekeeping is employed by other std APIs, as well as out-of-tree
5947 * The [new object lifetime defaults][nold] have been [turned
5948 on][nold2] after a cycle of warnings about the change.
5949 * There is a known [regression][lr] in how object lifetime elision is
5950 interpreted, the proper solution for which is undetermined.
5951 * The `#[prelude_import]` attribute, an internal implementation
5952 detail, was accidentally stabilized previously. [It has been put
5953 behind the `prelude_import` feature gate][pi]. This change is
5954 believed to break no existing code.
5955 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
5956 [more sane for dynamically sized types][dst3]. Code that relied on
5957 the previous behavior is thought to be broken.
5958 * The `dropck` rules, which checks that destructors can't access
5959 destroyed values, [have been updated][dropck] to match the
5960 [RFC][dropckrfc]. This fixes some soundness holes, and as such will
5961 cause some previously-compiling code to no longer build.
5966 * The [new object lifetime defaults][nold] have been [turned
5967 on][nold2] after a cycle of warnings about the change.
5968 * Semicolons may [now follow types and paths in
5969 macros](https://github.com/rust-lang/rust/pull/27000).
5970 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
5971 [more sane for dynamically sized types][dst3]. Code that relied on
5972 the previous behavior is not known to exist, and suspected to be
5974 * `'static` variables [may now be recursive][st].
5975 * `ref` bindings choose between [`Deref`] and [`DerefMut`]
5976 implementations correctly.
5977 * The `dropck` rules, which checks that destructors can't access
5978 destroyed values, [have been updated][dropck] to match the
5984 * The [`Duration`] API, [has been stabilized][ds], as well as the
5985 `std::time` module, which presently contains only `Duration`.
5986 * `Box<str>` and `Box<[T]>` both implement `Clone`.
5987 * The owned C string, [`CString`], implements [`Borrow`] and the
5988 borrowed C string, [`CStr`], implements [`ToOwned`]. The two of
5989 these allow C strings to be borrowed and cloned in generic code.
5990 * [`CStr`] implements [`Debug`].
5991 * [`AtomicPtr`] implements [`Debug`].
5992 * [`Error`] trait objects [can be downcast to their concrete types][e]
5993 in many common configurations, using the [`is`], [`downcast`],
5994 [`downcast_ref`] and [`downcast_mut`] methods, similarly to the
5996 * Searching for substrings now [employs the two-way algorithm][search]
5997 instead of doing a naive search. This gives major speedups to a
5998 number of methods, including [`contains`][sc], [`find`][sf],
5999 [`rfind`][srf], [`split`][ss]. [`starts_with`][ssw] and
6000 [`ends_with`][sew] are also faster.
6001 * The performance of `PartialEq` for slices is [much faster][ps].
6002 * The [`Hash`] trait offers the default method, [`hash_slice`], which
6003 is overridden and optimized by the implementations for scalars.
6004 * The [`Hasher`] trait now has a number of specialized `write_*`
6005 methods for primitive types, for efficiency.
6006 * The I/O-specific error type, [`std::io::Error`][ie], gained a set of
6007 methods for accessing the 'inner error', if any: [`get_ref`][iegr],
6008 [`get_mut`][iegm], [`into_inner`][ieii]. As well, the implementation
6009 of [`std::error::Error::cause`][iec] also delegates to the inner
6011 * [`process::Child`][pc] gained the [`id`] method, which returns a
6012 `u32` representing the platform-specific process identifier.
6013 * The [`connect`] method on slices is deprecated, replaced by the new
6014 [`join`] method (note that both of these are on the *unstable*
6015 [`SliceConcatExt`] trait, but through the magic of the prelude are
6016 available to stable code anyway).
6017 * The [`Div`] operator is implemented for [`Wrapping`] types.
6018 * [`DerefMut` is implemented for `String`][dms].
6019 * Performance of SipHash (the default hasher for `HashMap`) is
6020 [better for long data][sh].
6021 * [`AtomicPtr`] implements [`Send`].
6022 * The [`read_to_end`] implementations for [`Stdin`] and [`File`]
6023 are now [specialized to use uninitialized buffers for increased
6025 * Lifetime parameters of foreign functions [are now resolved
6031 * Rust can now, with some coercion, [produce programs that run on
6032 Windows XP][xp], though XP is not considered a supported platform.
6033 * Porting Rust on Windows from the GNU toolchain to MSVC continues
6034 ([1][win1], [2][win2], [3][win3], [4][win4]). It is still not
6035 recommended for use in 1.3, though should be fully-functional
6036 in the [64-bit 1.4 beta][b14].
6037 * On Fedora-based systems installation will [properly configure the
6038 dynamic linker][fl].
6039 * The compiler gained many new extended error descriptions, which can
6040 be accessed with the `--explain` flag.
6041 * The `dropck` pass, which checks that destructors can't access
6042 destroyed values, [has been rewritten][dropck]. This fixes some
6043 soundness holes, and as such will cause some previously-compiling
6044 code to no longer build.
6045 * `rustc` now uses [LLVM to write archive files where possible][ar].
6046 Eventually this will eliminate the compiler's dependency on the ar
6048 * Rust has [preliminary support for i686 FreeBSD][fb] (it has long
6049 supported FreeBSD on x86_64).
6050 * The [`unused_mut`][lum], [`unconditional_recursion`][lur],
6051 [`improper_ctypes`][lic], and [`negate_unsigned`][lnu] lints are
6053 * If landing pads are disabled (with `-Z no-landing-pads`), [`panic!`
6054 will kill the process instead of leaking][nlp].
6056 [`Any`]: http://doc.rust-lang.org/nightly/std/any/trait.Any.html
6057 [`AtomicPtr`]: http://doc.rust-lang.org/nightly/std/sync/atomic/struct.AtomicPtr.html
6058 [`Borrow`]: http://doc.rust-lang.org/nightly/std/borrow/trait.Borrow.html
6059 [`CStr`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html
6060 [`CString`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html
6061 [`Debug`]: http://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
6062 [`DerefMut`]: http://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
6063 [`Deref`]: http://doc.rust-lang.org/nightly/std/ops/trait.Deref.html
6064 [`Div`]: http://doc.rust-lang.org/nightly/std/ops/trait.Div.html
6065 [`Duration`]: http://doc.rust-lang.org/nightly/std/time/struct.Duration.html
6066 [`Error`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html
6067 [`File`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html
6068 [`Hash`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html
6069 [`Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
6070 [`Send`]: http://doc.rust-lang.org/nightly/std/marker/trait.Send.html
6071 [`SliceConcatExt`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html
6072 [`Stdin`]: http://doc.rust-lang.org/nightly/std/io/struct.Stdin.html
6073 [`ToOwned`]: http://doc.rust-lang.org/nightly/std/borrow/trait.ToOwned.html
6074 [`Wrapping`]: http://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
6075 [`connect`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.connect
6076 [`downcast_mut`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_mut
6077 [`downcast_ref`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_ref
6078 [`downcast`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast
6079 [`hash_slice`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
6080 [`id`]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html#method.id
6081 [`is`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.is
6082 [`join`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.join
6083 [`read_to_end`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_to_end
6084 [ar]: https://github.com/rust-lang/rust/pull/26926
6085 [b14]: https://static.rust-lang.org/dist/rust-beta-x86_64-pc-windows-msvc.msi
6086 [dms]: https://github.com/rust-lang/rust/pull/26241
6087 [dropck]: https://github.com/rust-lang/rust/pull/27261
6088 [dropckrfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
6089 [ds]: https://github.com/rust-lang/rust/pull/26818
6090 [dst1]: http://doc.rust-lang.org/nightly/std/mem/fn.size_of_val.html
6091 [dst2]: http://doc.rust-lang.org/nightly/std/mem/fn.align_of_val.html
6092 [dst3]: https://github.com/rust-lang/rust/pull/27351
6093 [e]: https://github.com/rust-lang/rust/pull/24793
6094 [f]: https://github.com/rust-lang/rust/pull/26588
6095 [fb]: https://github.com/rust-lang/rust/pull/26959
6096 [fl]: https://github.com/rust-lang/rust-installer/pull/41
6097 [hs]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
6098 [ie]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html
6099 [iec]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.cause
6100 [iegm]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_mut
6101 [iegr]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_ref
6102 [ieii]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.into_inner
6103 [lic]: https://github.com/rust-lang/rust/pull/26583
6104 [lnu]: https://github.com/rust-lang/rust/pull/27026
6105 [lr]: https://github.com/rust-lang/rust/issues/27248
6106 [lum]: https://github.com/rust-lang/rust/pull/26378
6107 [lur]: https://github.com/rust-lang/rust/pull/26783
6108 [nlp]: https://github.com/rust-lang/rust/pull/27176
6109 [nold2]: https://github.com/rust-lang/rust/pull/27045
6110 [nold]: https://github.com/rust-lang/rfcs/blob/master/text/1156-adjust-default-object-bounds.md
6111 [nom]: http://doc.rust-lang.org/nightly/nomicon/
6112 [pc]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html
6113 [pi]: https://github.com/rust-lang/rust/pull/26699
6114 [ps]: https://github.com/rust-lang/rust/pull/26884
6115 [rte]: https://github.com/rust-lang/rust/pull/26950
6116 [sc]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.contains
6117 [search]: https://github.com/rust-lang/rust/pull/26327
6118 [sew]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.ends_with
6119 [sf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.find
6120 [sh]: https://github.com/rust-lang/rust/pull/27280
6121 [srf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rfind
6122 [ss]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split
6123 [ssw]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.starts_with
6124 [st]: https://github.com/rust-lang/rust/pull/26630
6125 [win1]: https://github.com/rust-lang/rust/pull/26569
6126 [win2]: https://github.com/rust-lang/rust/pull/26741
6127 [win3]: https://github.com/rust-lang/rust/pull/26741
6128 [win4]: https://github.com/rust-lang/rust/pull/27210
6129 [xp]: https://github.com/rust-lang/rust/pull/26569
6131 Version 1.2.0 (2015-08-07)
6132 ==========================
6134 * ~1200 changes, numerous bugfixes
6139 * [Dynamically-sized-type coercions][dst] allow smart pointer types
6140 like `Rc` to contain types without a fixed size, arrays and trait
6141 objects, finally enabling use of `Rc<[T]>` and completing the
6142 implementation of DST.
6143 * [Parallel codegen][parcodegen] is now working again, which can
6144 substantially speed up large builds in debug mode; It also gets
6145 another ~33% speedup when bootstrapping on a 4 core machine (using 8
6146 jobs). It's not enabled by default, but will be "in the near
6147 future". It can be activated with the `-C codegen-units=N` flag to
6149 * This is the first release with [experimental support for linking
6150 with the MSVC linker and lib C on Windows (instead of using the GNU
6151 variants via MinGW)][win]. It is yet recommended only for the most
6152 intrepid Rustaceans.
6153 * Benchmark compilations are showing a 30% improvement in
6154 bootstrapping over 1.1.
6159 * The [`to_uppercase`] and [`to_lowercase`] methods on `char` now do
6160 unicode case mapping, which is a previously-planned change in
6161 behavior and considered a bugfix.
6162 * [`mem::align_of`] now specifies [the *minimum alignment* for
6163 T][align], which is usually the alignment programs are interested
6164 in, and the same value reported by clang's
6165 `alignof`. [`mem::min_align_of`] is deprecated. This is not known to
6167 * [The `#[packed]` attribute is no longer silently accepted by the
6168 compiler][packed]. This attribute did nothing and code that
6169 mentioned it likely did not work as intended.
6170 * Associated type defaults are [now behind the
6171 `associated_type_defaults` feature gate][ad]. In 1.1 associated type
6172 defaults *did not work*, but could be mentioned syntactically. As
6173 such this breakage has minimal impact.
6178 * Patterns with `ref mut` now correctly invoke [`DerefMut`] when
6179 matching against dereferenceable values.
6184 * The [`Extend`] trait, which grows a collection from an iterator, is
6185 implemented over iterators of references, for `String`, `Vec`,
6186 `LinkedList`, `VecDeque`, `EnumSet`, `BinaryHeap`, `VecMap`,
6187 `BTreeSet` and `BTreeMap`. [RFC][extend-rfc].
6188 * The [`iter::once`] function returns an iterator that yields a single
6189 element, and [`iter::empty`] returns an iterator that yields no
6191 * The [`matches`] and [`rmatches`] methods on `str` return iterators
6192 over substring matches.
6193 * [`Cell`] and [`RefCell`] both implement `Eq`.
6194 * A number of methods for wrapping arithmetic are added to the
6195 integral types, [`wrapping_div`], [`wrapping_rem`],
6196 [`wrapping_neg`], [`wrapping_shl`], [`wrapping_shr`]. These are in
6197 addition to the existing [`wrapping_add`], [`wrapping_sub`], and
6198 [`wrapping_mul`] methods, and alternatives to the [`Wrapping`]
6199 type.. It is illegal for the default arithmetic operations in Rust
6200 to overflow; the desire to wrap must be explicit.
6201 * The `{:#?}` formatting specifier [displays the alternate,
6202 pretty-printed][debugfmt] form of the `Debug` formatter. This
6203 feature was actually introduced prior to 1.0 with little
6205 * [`fmt::Formatter`] implements [`fmt::Write`], a `fmt`-specific trait
6206 for writing data to formatted strings, similar to [`io::Write`].
6207 * [`fmt::Formatter`] adds 'debug builder' methods, [`debug_struct`],
6208 [`debug_tuple`], [`debug_list`], [`debug_set`], [`debug_map`]. These
6209 are used by code generators to emit implementations of [`Debug`].
6210 * `str` has new [`to_uppercase`][strup] and [`to_lowercase`][strlow]
6211 methods that convert case, following Unicode case mapping.
6212 * It is now easier to handle poisoned locks. The [`PoisonError`]
6213 type, returned by failing lock operations, exposes `into_inner`,
6214 `get_ref`, and `get_mut`, which all give access to the inner lock
6215 guard, and allow the poisoned lock to continue to operate. The
6216 `is_poisoned` method of [`RwLock`] and [`Mutex`] can poll for a
6217 poisoned lock without attempting to take the lock.
6218 * On Unix the [`FromRawFd`] trait is implemented for [`Stdio`], and
6219 [`AsRawFd`] for [`ChildStdin`], [`ChildStdout`], [`ChildStderr`].
6220 On Windows the `FromRawHandle` trait is implemented for `Stdio`,
6221 and `AsRawHandle` for `ChildStdin`, `ChildStdout`,
6223 * [`io::ErrorKind`] has a new variant, `InvalidData`, which indicates
6229 * `rustc` employs smarter heuristics for guessing at [typos].
6230 * `rustc` emits more efficient code for [no-op conversions between
6231 unsafe pointers][nop].
6232 * Fat pointers are now [passed in pairs of immediate arguments][fat],
6233 resulting in faster compile times and smaller code.
6235 [`Extend`]: https://doc.rust-lang.org/nightly/std/iter/trait.Extend.html
6236 [extend-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
6237 [`iter::once`]: https://doc.rust-lang.org/nightly/std/iter/fn.once.html
6238 [`iter::empty`]: https://doc.rust-lang.org/nightly/std/iter/fn.empty.html
6239 [`matches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.matches
6240 [`rmatches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatches
6241 [`Cell`]: https://doc.rust-lang.org/nightly/std/cell/struct.Cell.html
6242 [`RefCell`]: https://doc.rust-lang.org/nightly/std/cell/struct.RefCell.html
6243 [`wrapping_add`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_add
6244 [`wrapping_sub`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_sub
6245 [`wrapping_mul`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_mul
6246 [`wrapping_div`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_div
6247 [`wrapping_rem`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_rem
6248 [`wrapping_neg`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_neg
6249 [`wrapping_shl`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shl
6250 [`wrapping_shr`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shr
6251 [`Wrapping`]: https://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
6252 [`fmt::Formatter`]: https://doc.rust-lang.org/nightly/std/fmt/struct.Formatter.html
6253 [`fmt::Write`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Write.html
6254 [`io::Write`]: https://doc.rust-lang.org/nightly/std/io/trait.Write.html
6255 [`debug_struct`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_struct
6256 [`debug_tuple`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_tuple
6257 [`debug_list`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_list
6258 [`debug_set`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_set
6259 [`debug_map`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_map
6260 [`Debug`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
6261 [strup]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_uppercase
6262 [strlow]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_lowercase
6263 [`to_uppercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_uppercase
6264 [`to_lowercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_lowercase
6265 [`PoisonError`]: https://doc.rust-lang.org/nightly/std/sync/struct.PoisonError.html
6266 [`RwLock`]: https://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html
6267 [`Mutex`]: https://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html
6268 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
6269 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
6270 [`Stdio`]: https://doc.rust-lang.org/nightly/std/process/struct.Stdio.html
6271 [`ChildStdin`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdin.html
6272 [`ChildStdout`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdout.html
6273 [`ChildStderr`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStderr.html
6274 [`io::ErrorKind`]: https://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html
6275 [debugfmt]: https://www.reddit.com/r/rust/comments/3ceaui/psa_produces_prettyprinted_debug_output/
6276 [`DerefMut`]: https://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
6277 [`mem::align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.align_of.html
6278 [align]: https://github.com/rust-lang/rust/pull/25646
6279 [`mem::min_align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.min_align_of.html
6280 [typos]: https://github.com/rust-lang/rust/pull/26087
6281 [nop]: https://github.com/rust-lang/rust/pull/26336
6282 [fat]: https://github.com/rust-lang/rust/pull/26411
6283 [dst]: https://github.com/rust-lang/rfcs/blob/master/text/0982-dst-coercion.md
6284 [parcodegen]: https://github.com/rust-lang/rust/pull/26018
6285 [packed]: https://github.com/rust-lang/rust/pull/25541
6286 [ad]: https://github.com/rust-lang/rust/pull/27382
6287 [win]: https://github.com/rust-lang/rust/pull/25350
6289 Version 1.1.0 (2015-06-25)
6290 =========================
6292 * ~850 changes, numerous bugfixes
6297 * The [`std::fs` module has been expanded][fs] to expand the set of
6298 functionality exposed:
6299 * `DirEntry` now supports optimizations like `file_type` and `metadata` which
6300 don't incur a syscall on some platforms.
6301 * A `symlink_metadata` function has been added.
6302 * The `fs::Metadata` structure now lowers to its OS counterpart, providing
6303 access to all underlying information.
6304 * The compiler now contains extended explanations of many errors. When an error
6305 with an explanation occurs the compiler suggests using the `--explain` flag
6306 to read the explanation. Error explanations are also [available online][err-index].
6307 * Thanks to multiple [improvements][sk] to [type checking][pre], as
6308 well as other work, the time to bootstrap the compiler decreased by
6314 * The [`str::split_whitespace`] method splits a string on unicode
6315 whitespace boundaries.
6316 * On both Windows and Unix, new extension traits provide conversion of
6317 I/O types to and from the underlying system handles. On Unix, these
6318 traits are [`FromRawFd`] and [`AsRawFd`], on Windows `FromRawHandle`
6319 and `AsRawHandle`. These are implemented for `File`, `TcpStream`,
6320 `TcpListener`, and `UpdSocket`. Further implementations for
6321 `std::process` will be stabilized later.
6322 * On Unix, [`std::os::unix::symlink`] creates symlinks. On
6323 Windows, symlinks can be created with
6324 `std::os::windows::symlink_dir` and
6325 `std::os::windows::symlink_file`.
6326 * The `mpsc::Receiver` type can now be converted into an iterator with
6327 `into_iter` on the [`IntoIterator`] trait.
6328 * `Ipv4Addr` can be created from `u32` with the `From<u32>`
6329 implementation of the [`From`] trait.
6330 * The `Debug` implementation for `RangeFull` [creates output that is
6331 more consistent with other implementations][rf].
6332 * [`Debug` is implemented for `File`][file].
6333 * The `Default` implementation for `Arc` [no longer requires `Sync +
6335 * [The `Iterator` methods `count`, `nth`, and `last` have been
6336 overridden for slices to have O(1) performance instead of O(n)][si].
6337 * Incorrect handling of paths on Windows has been improved in both the
6338 compiler and the standard library.
6339 * [`AtomicPtr` gained a `Default` implementation][ap].
6340 * In accordance with Rust's policy on arithmetic overflow `abs` now
6341 [panics on overflow when debug assertions are enabled][abs].
6342 * The [`Cloned`] iterator, which was accidentally left unstable for
6343 1.0 [has been stabilized][c].
6344 * The [`Incoming`] iterator, which iterates over incoming TCP
6345 connections, and which was accidentally unnamable in 1.0, [is now
6346 properly exported][inc].
6347 * [`BinaryHeap`] no longer corrupts itself [when functions called by
6348 `sift_up` or `sift_down` panic][bh].
6349 * The [`split_off`] method of `LinkedList` [no longer corrupts
6350 the list in certain scenarios][ll].
6355 * Type checking performance [has improved notably][sk] with
6356 [multiple improvements][pre].
6357 * The compiler [suggests code changes][ch] for more errors.
6358 * rustc and it's build system have experimental support for [building
6359 toolchains against MUSL][m] instead of glibc on Linux.
6360 * The compiler defines the `target_env` cfg value, which is used for
6361 distinguishing toolchains that are otherwise for the same
6362 platform. Presently this is set to `gnu` for common GNU Linux
6363 targets and for MinGW targets, and `musl` for MUSL Linux targets.
6364 * The [`cargo rustc`][crc] command invokes a build with custom flags
6366 * [Android executables are always position independent][pie].
6367 * [The `drop_with_repr_extern` lint warns about mixing `repr(C)`
6370 [`str::split_whitespace`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_whitespace
6371 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
6372 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
6373 [`std::os::unix::symlink`]: https://doc.rust-lang.org/nightly/std/os/unix/fs/fn.symlink.html
6374 [`IntoIterator`]: https://doc.rust-lang.org/nightly/std/iter/trait.IntoIterator.html
6375 [`From`]: https://doc.rust-lang.org/nightly/std/convert/trait.From.html
6376 [rf]: https://github.com/rust-lang/rust/pull/24491
6377 [err-index]: https://doc.rust-lang.org/error-index.html
6378 [sk]: https://github.com/rust-lang/rust/pull/24615
6379 [pre]: https://github.com/rust-lang/rust/pull/25323
6380 [file]: https://github.com/rust-lang/rust/pull/24598
6381 [ch]: https://github.com/rust-lang/rust/pull/24683
6382 [arc]: https://github.com/rust-lang/rust/pull/24695
6383 [si]: https://github.com/rust-lang/rust/pull/24701
6384 [ap]: https://github.com/rust-lang/rust/pull/24834
6385 [m]: https://github.com/rust-lang/rust/pull/24777
6386 [fs]: https://github.com/rust-lang/rfcs/blob/master/text/1044-io-fs-2.1.md
6387 [crc]: https://github.com/rust-lang/cargo/pull/1568
6388 [pie]: https://github.com/rust-lang/rust/pull/24953
6389 [abs]: https://github.com/rust-lang/rust/pull/25441
6390 [c]: https://github.com/rust-lang/rust/pull/25496
6391 [`Cloned`]: https://doc.rust-lang.org/nightly/std/iter/struct.Cloned.html
6392 [`Incoming`]: https://doc.rust-lang.org/nightly/std/net/struct.Incoming.html
6393 [inc]: https://github.com/rust-lang/rust/pull/25522
6394 [bh]: https://github.com/rust-lang/rust/pull/25856
6395 [`BinaryHeap`]: https://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html
6396 [ll]: https://github.com/rust-lang/rust/pull/26022
6397 [`split_off`]: https://doc.rust-lang.org/nightly/collections/linked_list/struct.LinkedList.html#method.split_off
6398 [drop]: https://github.com/rust-lang/rust/pull/24935
6400 Version 1.0.0 (2015-05-15)
6401 ========================
6403 * ~1500 changes, numerous bugfixes
6408 * The vast majority of the standard library is now `#[stable]`. It is
6409 no longer possible to use unstable features with a stable build of
6411 * Many popular crates on [crates.io] now work on the stable release
6413 * Arithmetic on basic integer types now [checks for overflow in debug
6419 * Several [restrictions have been added to trait coherence][coh] in
6420 order to make it easier for upstream authors to change traits
6421 without breaking downstream code.
6422 * Digits of binary and octal literals are [lexed more eagerly][lex] to
6423 improve error messages and macro behavior. For example, `0b1234` is
6424 now lexed as `0b1234` instead of two tokens, `0b1` and `234`.
6425 * Trait bounds [are always invariant][inv], eliminating the need for
6426 the `PhantomFn` and `MarkerTrait` lang items, which have been
6428 * ["-" is no longer a valid character in crate names][cr], the `extern crate
6429 "foo" as bar` syntax has been replaced with `extern crate foo as
6430 bar`, and Cargo now automatically translates "-" in *package* names
6431 to underscore for the crate name.
6432 * [Lifetime shadowing is an error][lt].
6433 * [`Send` no longer implies `'static`][send-rfc].
6434 * [UFCS now supports trait-less associated paths][moar-ufcs] like
6435 `MyType::default()`.
6436 * Primitive types [now have inherent methods][prim-inherent],
6437 obviating the need for extension traits like `SliceExt`.
6438 * Methods with `Self: Sized` in their `where` clause are [considered
6439 object-safe][self-sized], allowing many extension traits like
6440 `IteratorExt` to be merged into the traits they extended.
6441 * You can now [refer to associated types][assoc-where] whose
6442 corresponding trait bounds appear only in a `where` clause.
6443 * The final bits of [OIBIT landed][oibit-final], meaning that traits
6444 like `Send` and `Sync` are now library-defined.
6445 * A [Reflect trait][reflect] was introduced, which means that
6446 downcasting via the `Any` trait is effectively limited to concrete
6447 types. This helps retain the potentially-important "parametricity"
6448 property: generic code cannot behave differently for different type
6449 arguments except in minor ways.
6450 * The `unsafe_destructor` feature is now deprecated in favor of the
6451 [new `dropck`][dropck]. This change is a major reduction in unsafe
6457 * The `thread_local` module [has been renamed to `std::thread`][th].
6458 * The methods of `IteratorExt` [have been moved to the `Iterator`
6460 * Several traits that implement Rust's conventions for type
6461 conversions, `AsMut`, `AsRef`, `From`, and `Into` have been
6462 [centralized in the `std::convert` module][con].
6463 * The `FromError` trait [was removed in favor of `From`][fe].
6464 * The basic sleep function [has moved to
6465 `std::thread::sleep_ms`][slp].
6466 * The `splitn` function now takes an `n` parameter that represents the
6467 number of items yielded by the returned iterator [instead of the
6468 number of 'splits'][spl].
6469 * [On Unix, all file descriptors are `CLOEXEC` by default][clo].
6470 * [Derived implementations of `PartialOrd` now order enums according
6471 to their explicitly-assigned discriminants][po].
6472 * [Methods for searching strings are generic over `Pattern`s][pat],
6473 implemented presently by `&char`, `&str`, `FnMut(char) -> bool` and
6475 * [In method resolution, object methods are resolved before inherent
6477 * [`String::from_str` has been deprecated in favor of the `From` impl,
6478 `String::from`][sf].
6479 * [`io::Error` implements `Sync`][ios].
6480 * [The `words` method on `&str` has been replaced with
6481 `split_whitespace`][sw], to avoid answering the tricky question, 'what is
6483 * The new path and IO modules are complete and `#[stable]`. This
6484 was the major library focus for this cycle.
6485 * The path API was [revised][path-normalize] to normalize `.`,
6486 adjusting the tradeoffs in favor of the most common usage.
6487 * A large number of remaining APIs in `std` were also stabilized
6488 during this cycle; about 75% of the non-deprecated API surface
6490 * The new [string pattern API][string-pattern] landed, which makes
6491 the string slice API much more internally consistent and flexible.
6492 * A new set of [generic conversion traits][conversion] replaced
6493 many existing ad hoc traits.
6494 * Generic numeric traits were [completely removed][num-traits]. This
6495 was made possible thanks to inherent methods for primitive types,
6496 and the removal gives maximal flexibility for designing a numeric
6497 hierarchy in the future.
6498 * The `Fn` traits are now related via [inheritance][fn-inherit]
6499 and provide ergonomic [blanket implementations][fn-blanket].
6500 * The `Index` and `IndexMut` traits were changed to
6501 [take the index by value][index-value], enabling code like
6502 `hash_map["string"]` to work.
6503 * `Copy` now [inherits][copy-clone] from `Clone`, meaning that all
6504 `Copy` data is known to be `Clone` as well.
6509 * Many errors now have extended explanations that can be accessed with
6510 the `--explain` flag to `rustc`.
6511 * Many new examples have been added to the standard library
6513 * rustdoc has received a number of improvements focused on completion
6515 * Metadata was tuned, shrinking binaries [by 27%][metadata-shrink].
6516 * Much headway was made on ecosystem-wide CI, making it possible
6517 to [compare builds for breakage][ci-compare].
6520 [crates.io]: http://crates.io
6521 [clo]: https://github.com/rust-lang/rust/pull/24034
6522 [coh]: https://github.com/rust-lang/rfcs/blob/master/text/1023-rebalancing-coherence.md
6523 [con]: https://github.com/rust-lang/rust/pull/23875
6524 [cr]: https://github.com/rust-lang/rust/pull/23419
6525 [fe]: https://github.com/rust-lang/rust/pull/23879
6526 [ie]: https://github.com/rust-lang/rust/pull/23300
6527 [inv]: https://github.com/rust-lang/rust/pull/23938
6528 [ios]: https://github.com/rust-lang/rust/pull/24133
6529 [lex]: https://github.com/rust-lang/rfcs/blob/master/text/0879-small-base-lexing.md
6530 [lt]: https://github.com/rust-lang/rust/pull/24057
6531 [meth]: https://github.com/rust-lang/rust/pull/24056
6532 [pat]: https://github.com/rust-lang/rfcs/blob/master/text/0528-string-patterns.md
6533 [po]: https://github.com/rust-lang/rust/pull/24270
6534 [sf]: https://github.com/rust-lang/rust/pull/24517
6535 [slp]: https://github.com/rust-lang/rust/pull/23949
6536 [spl]: https://github.com/rust-lang/rfcs/blob/master/text/0979-align-splitn-with-other-languages.md
6537 [sw]: https://github.com/rust-lang/rfcs/blob/master/text/1054-str-words.md
6538 [th]: https://github.com/rust-lang/rfcs/blob/master/text/0909-move-thread-local-to-std-thread.md
6539 [send-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0458-send-improvements.md
6540 [moar-ufcs]: https://github.com/rust-lang/rust/pull/22172
6541 [prim-inherent]: https://github.com/rust-lang/rust/pull/23104
6542 [overflow]: https://github.com/rust-lang/rfcs/blob/master/text/0560-integer-overflow.md
6543 [metadata-shrink]: https://github.com/rust-lang/rust/pull/22971
6544 [self-sized]: https://github.com/rust-lang/rust/pull/22301
6545 [assoc-where]: https://github.com/rust-lang/rust/pull/22512
6546 [string-pattern]: https://github.com/rust-lang/rust/pull/22466
6547 [oibit-final]: https://github.com/rust-lang/rust/pull/21689
6548 [reflect]: https://github.com/rust-lang/rust/pull/23712
6549 [conversion]: https://github.com/rust-lang/rfcs/pull/529
6550 [num-traits]: https://github.com/rust-lang/rust/pull/23549
6551 [index-value]: https://github.com/rust-lang/rust/pull/23601
6552 [dropck]: https://github.com/rust-lang/rfcs/pull/769
6553 [ci-compare]: https://gist.github.com/brson/a30a77836fbec057cbee
6554 [fn-inherit]: https://github.com/rust-lang/rust/pull/23282
6555 [fn-blanket]: https://github.com/rust-lang/rust/pull/23895
6556 [copy-clone]: https://github.com/rust-lang/rust/pull/23860
6557 [path-normalize]: https://github.com/rust-lang/rust/pull/23229
6560 Version 1.0.0-alpha.2 (2015-02-20)
6561 =====================================
6563 * ~1300 changes, numerous bugfixes
6567 * The various I/O modules were [overhauled][io-rfc] to reduce
6568 unnecessary abstractions and provide better interoperation with
6569 the underlying platform. The old `io` module remains temporarily
6571 * The standard library now [participates in feature gating][feat],
6572 so use of unstable libraries now requires a `#![feature(...)]`
6573 attribute. The impact of this change is [described on the
6574 forum][feat-forum]. [RFC][feat-rfc].
6578 * `for` loops [now operate on the `IntoIterator` trait][into],
6579 which eliminates the need to call `.iter()`, etc. to iterate
6580 over collections. There are some new subtleties to remember
6581 though regarding what sort of iterators various types yield, in
6582 particular that `for foo in bar { }` yields values from a move
6583 iterator, destroying the original collection. [RFC][into-rfc].
6584 * Objects now have [default lifetime bounds][obj], so you don't
6585 have to write `Box<Trait+'static>` when you don't care about
6586 storing references. [RFC][obj-rfc].
6587 * In types that implement `Drop`, [lifetimes must outlive the
6588 value][drop]. This will soon make it possible to safely
6589 implement `Drop` for types where `#[unsafe_destructor]` is now
6590 required. Read the [gorgeous RFC][drop-rfc] for details.
6591 * The fully qualified <T as Trait>::X syntax lets you set the Self
6592 type for a trait method or associated type. [RFC][ufcs-rfc].
6593 * References to types that implement `Deref<U>` now [automatically
6594 coerce to references][deref] to the dereferenced type `U`,
6595 e.g. `&T where T: Deref<U>` automatically coerces to `&U`. This
6596 should eliminate many unsightly uses of `&*`, as when converting
6597 from references to vectors into references to
6598 slices. [RFC][deref-rfc].
6599 * The explicit [closure kind syntax][close] (`|&:|`, `|&mut:|`,
6600 `|:|`) is obsolete and closure kind is inferred from context.
6601 * [`Self` is a keyword][Self].
6605 * The `Show` and `String` formatting traits [have been
6606 renamed][fmt] to `Debug` and `Display` to more clearly reflect
6607 their related purposes. Automatically getting a string
6608 conversion to use with `format!("{:?}", something_to_debug)` is
6609 now written `#[derive(Debug)]`.
6610 * Abstract [OS-specific string types][osstr], `std::ff::{OsString,
6611 OsStr}`, provide strings in platform-specific encodings for easier
6612 interop with system APIs. [RFC][osstr-rfc].
6613 * The `boxed::into_raw` and `Box::from_raw` functions [convert
6614 between `Box<T>` and `*mut T`][boxraw], a common pattern for
6615 creating raw pointers.
6619 * Certain long error messages of the form 'expected foo found bar'
6620 are now [split neatly across multiple
6621 lines][multiline]. Examples in the PR.
6622 * On Unix Rust can be [uninstalled][un] by running
6623 `/usr/local/lib/rustlib/uninstall.sh`.
6624 * The `#[rustc_on_unimplemented]` attribute, requiring the
6625 'on_unimplemented' feature, lets rustc [display custom error
6626 messages when a trait is expected to be implemented for a type
6631 * Rust is tested against a [LALR grammar][lalr], which parses
6632 almost all the Rust files that rustc does.
6634 [boxraw]: https://github.com/rust-lang/rust/pull/21318
6635 [close]: https://github.com/rust-lang/rust/pull/21843
6636 [deref]: https://github.com/rust-lang/rust/pull/21351
6637 [deref-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0241-deref-conversions.md
6638 [drop]: https://github.com/rust-lang/rust/pull/21972
6639 [drop-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
6640 [feat]: https://github.com/rust-lang/rust/pull/21248
6641 [feat-forum]: https://users.rust-lang.org/t/psa-important-info-about-rustcs-new-feature-staging/82/5
6642 [feat-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0507-release-channels.md
6643 [fmt]: https://github.com/rust-lang/rust/pull/21457
6644 [into]: https://github.com/rust-lang/rust/pull/20790
6645 [into-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md#intoiterator-and-iterable
6646 [io-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
6647 [lalr]: https://github.com/rust-lang/rust/pull/21452
6648 [multiline]: https://github.com/rust-lang/rust/pull/19870
6649 [obj]: https://github.com/rust-lang/rust/pull/22230
6650 [obj-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0599-default-object-bound.md
6651 [onun]: https://github.com/rust-lang/rust/pull/20889
6652 [osstr]: https://github.com/rust-lang/rust/pull/21488
6653 [osstr-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
6654 [Self]: https://github.com/rust-lang/rust/pull/22158
6655 [ufcs-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0132-ufcs.md
6656 [un]: https://github.com/rust-lang/rust/pull/22256
6659 Version 1.0.0-alpha (2015-01-09)
6660 ==================================
6662 * ~2400 changes, numerous bugfixes
6666 * The language itself is considered feature complete for 1.0,
6667 though there will be many usability improvements and bugfixes
6668 before the final release.
6669 * Nearly 50% of the public API surface of the standard library has
6670 been declared 'stable'. Those interfaces are unlikely to change
6672 * The long-running debate over integer types has been
6673 [settled][ints]: Rust will ship with types named `isize` and
6674 `usize`, rather than `int` and `uint`, for pointer-sized
6675 integers. Guidelines will be rolled out during the alpha cycle.
6676 * Most crates that are not `std` have been moved out of the Rust
6677 distribution into the Cargo ecosystem so they can evolve
6678 separately and don't need to be stabilized as quickly, including
6679 'time', 'getopts', 'num', 'regex', and 'term'.
6680 * Documentation continues to be expanded with more API coverage, more
6681 examples, and more in-depth explanations. The guides have been
6682 consolidated into [The Rust Programming Language][trpl].
6683 * "[Rust By Example][rbe]" is now maintained by the Rust team.
6684 * All official Rust binary installers now come with [Cargo], the
6685 Rust package manager.
6689 * Closures have been [completely redesigned][unboxed] to be
6690 implemented in terms of traits, can now be used as generic type
6691 bounds and thus monomorphized and inlined, or via an opaque
6692 pointer (boxed) as in the old system. The new system is often
6693 referred to as 'unboxed' closures.
6694 * Traits now support [associated types][assoc], allowing families
6695 of related types to be defined together and used generically in
6697 * Enum variants are [namespaced by their type names][enum].
6698 * [`where` clauses][where] provide a more versatile and attractive
6699 syntax for specifying generic bounds, though the previous syntax
6701 * Rust again picks a [fallback][fb] (either i32 or f64) for uninferred
6703 * Rust [no longer has a runtime][rt] of any description, and only
6704 supports OS threads, not green threads.
6705 * At long last, Rust has been overhauled for 'dynamically-sized
6706 types' ([DST]), which integrates 'fat pointers' (object types,
6707 arrays, and `str`) more deeply into the type system, making it
6709 * Rust now has a general [range syntax][range], `i..j`, `i..`, and
6710 `..j` that produce range types and which, when combined with the
6711 `Index` operator and multidispatch, leads to a convenient slice
6713 * The new range syntax revealed an ambiguity in the fixed-length
6714 array syntax, so now fixed length arrays [are written `[T;
6716 * The `Copy` trait is no longer implemented automatically. Unsafe
6717 pointers no longer implement `Sync` and `Send` so types
6718 containing them don't automatically either. `Sync` and `Send`
6719 are now 'unsafe traits' so one can "forcibly" implement them via
6720 `unsafe impl` if a type confirms to the requirements for them
6721 even though the internals do not (e.g. structs containing unsafe
6722 pointers like `Arc`). These changes are intended to prevent some
6723 footguns and are collectively known as [opt-in built-in
6724 traits][oibit] (though `Sync` and `Send` will soon become pure
6725 library types unknown to the compiler).
6726 * Operator traits now take their operands [by value][ops], and
6727 comparison traits can use multidispatch to compare one type
6728 against multiple other types, allowing e.g. `String` to be
6729 compared with `&str`.
6730 * `if let` and `while let` are no longer feature-gated.
6731 * Rust has adopted a more [uniform syntax for escaping unicode
6732 characters][unicode].
6733 * `macro_rules!` [has been declared stable][mac]. Though it is a
6734 flawed system it is sufficiently popular that it must be usable
6735 for 1.0. Effort has gone into [future-proofing][mac-future] it
6736 in ways that will allow other macro systems to be developed in
6737 parallel, and won't otherwise impact the evolution of the
6739 * The prelude has been [pared back significantly][prelude] such
6740 that it is the minimum necessary to support the most pervasive
6741 code patterns, and through [generalized where clauses][where]
6742 many of the prelude extension traits have been consolidated.
6743 * Rust's rudimentary reflection [has been removed][refl], as it
6744 incurred too much code generation for little benefit.
6745 * [Struct variants][structvars] are no longer feature-gated.
6746 * Trait bounds can be [polymorphic over lifetimes][hrtb]. Also
6747 known as 'higher-ranked trait bounds', this crucially allows
6748 unboxed closures to work.
6749 * Macros invocations surrounded by parens or square brackets and
6750 not terminated by a semicolon are [parsed as
6751 expressions][macros], which makes expressions like `vec![1i32,
6752 2, 3].len()` work as expected.
6753 * Trait objects now implement their traits automatically, and
6754 traits that can be coerced to objects now must be [object
6756 * Automatically deriving traits is now done with `#[derive(...)]`
6757 not `#[deriving(...)]` for [consistency with other naming
6758 conventions][derive].
6759 * Importing the containing module or enum at the same time as
6760 items or variants they contain is [now done with `self` instead
6761 of `mod`][self], as in use `foo::{self, bar}`
6762 * Glob imports are no longer feature-gated.
6763 * The `box` operator and `box` patterns have been feature-gated
6764 pending a redesign. For now unique boxes should be allocated
6765 like other containers, with `Box::new`.
6769 * A [series][coll1] of [efforts][coll2] to establish
6770 [conventions][coll3] for collections types has resulted in API
6771 improvements throughout the standard library.
6772 * New [APIs for error handling][err] provide ergonomic interop
6773 between error types, and [new conventions][err-conv] describe
6774 more clearly the recommended error handling strategies in Rust.
6775 * The `fail!` macro has been renamed to [`panic!`][panic] so that
6776 it is easier to discuss failure in the context of error handling
6777 without making clarifications as to whether you are referring to
6778 the 'fail' macro or failure more generally.
6779 * On Linux, `OsRng` prefers the new, more reliable `getrandom`
6780 syscall when available.
6781 * The 'serialize' crate has been renamed 'rustc-serialize' and
6782 moved out of the distribution to Cargo. Although it is widely
6783 used now, it is expected to be superseded in the near future.
6784 * The `Show` formatter, typically implemented with
6785 `#[derive(Show)]` is [now requested with the `{:?}`
6786 specifier][show] and is intended for use by all types, for uses
6787 such as `println!` debugging. The new `String` formatter must be
6788 implemented by hand, uses the `{}` specifier, and is intended
6789 for full-fidelity conversions of things that can logically be
6790 represented as strings.
6794 * [Flexible target specification][flex] allows rustc's code
6795 generation to be configured to support otherwise-unsupported
6797 * Rust comes with rust-gdb and rust-lldb scripts that launch their
6798 respective debuggers with Rust-appropriate pretty-printing.
6799 * The Windows installation of Rust is distributed with the
6800 MinGW components currently required to link binaries on that
6805 * Nullable enum optimizations have been extended to more types so
6806 that e.g. `Option<Vec<T>>` and `Option<String>` take up no more
6807 space than the inner types themselves.
6808 * Work has begun on supporting AArch64.
6810 [Cargo]: https://crates.io
6811 [unboxed]: http://smallcultfollowing.com/babysteps/blog/2014/11/26/purging-proc/
6812 [enum]: https://github.com/rust-lang/rfcs/blob/master/text/0390-enum-namespacing.md
6813 [flex]: https://github.com/rust-lang/rfcs/blob/master/text/0131-target-specification.md
6814 [err]: https://github.com/rust-lang/rfcs/blob/master/text/0201-error-chaining.md
6815 [err-conv]: https://github.com/rust-lang/rfcs/blob/master/text/0236-error-conventions.md
6816 [rt]: https://github.com/rust-lang/rfcs/blob/master/text/0230-remove-runtime.md
6817 [mac]: https://github.com/rust-lang/rfcs/blob/master/text/0453-macro-reform.md
6818 [mac-future]: https://github.com/rust-lang/rfcs/pull/550
6819 [DST]: http://smallcultfollowing.com/babysteps/blog/2014/01/05/dst-take-5/
6820 [coll1]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md
6821 [coll2]: https://github.com/rust-lang/rfcs/blob/master/text/0509-collections-reform-part-2.md
6822 [coll3]: https://github.com/rust-lang/rfcs/blob/master/text/0216-collection-views.md
6823 [ops]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md
6824 [prelude]: https://github.com/rust-lang/rfcs/blob/master/text/0503-prelude-stabilization.md
6825 [where]: https://github.com/rust-lang/rfcs/blob/master/text/0135-where.md
6826 [refl]: https://github.com/rust-lang/rfcs/blob/master/text/0379-remove-reflection.md
6827 [panic]: https://github.com/rust-lang/rfcs/blob/master/text/0221-panic.md
6828 [structvars]: https://github.com/rust-lang/rfcs/blob/master/text/0418-struct-variants.md
6829 [hrtb]: https://github.com/rust-lang/rfcs/blob/master/text/0387-higher-ranked-trait-bounds.md
6830 [unicode]: https://github.com/rust-lang/rfcs/blob/master/text/0446-es6-unicode-escapes.md
6831 [oibit]: https://github.com/rust-lang/rfcs/blob/master/text/0019-opt-in-builtin-traits.md
6832 [macros]: https://github.com/rust-lang/rfcs/blob/master/text/0378-expr-macros.md
6833 [range]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md#indexing-and-slicing
6834 [arrays]: https://github.com/rust-lang/rfcs/blob/master/text/0520-new-array-repeat-syntax.md
6835 [show]: https://github.com/rust-lang/rfcs/blob/master/text/0504-show-stabilization.md
6836 [derive]: https://github.com/rust-lang/rfcs/blob/master/text/0534-deriving2derive.md
6837 [self]: https://github.com/rust-lang/rfcs/blob/master/text/0532-self-in-use.md
6838 [fb]: https://github.com/rust-lang/rfcs/blob/master/text/0212-restore-int-fallback.md
6839 [objsafe]: https://github.com/rust-lang/rfcs/blob/master/text/0255-object-safety.md
6840 [assoc]: https://github.com/rust-lang/rfcs/blob/master/text/0195-associated-items.md
6841 [ints]: https://github.com/rust-lang/rfcs/pull/544#issuecomment-68760871
6842 [trpl]: https://doc.rust-lang.org/book/index.html
6843 [rbe]: http://rustbyexample.com/
6846 Version 0.12.0 (2014-10-09)
6847 =============================
6849 * ~1900 changes, numerous bugfixes
6853 * The introductory documentation (now called The Rust Guide) has
6854 been completely rewritten, as have a number of supplementary
6856 * Rust's package manager, Cargo, continues to improve and is
6857 sometimes considered to be quite awesome.
6858 * Many API's in `std` have been reviewed and updated for
6859 consistency with the in-development Rust coding
6860 guidelines. The standard library documentation tracks
6861 stabilization progress.
6862 * Minor libraries have been moved out-of-tree to the rust-lang org
6863 on GitHub: uuid, semver, glob, num, hexfloat, fourcc. They can
6864 be installed with Cargo.
6865 * Lifetime elision allows lifetime annotations to be left off of
6866 function declarations in many common scenarios.
6867 * Rust now works on 64-bit Windows.
6870 * Indexing can be overloaded with the `Index` and `IndexMut`
6872 * The `if let` construct takes a branch only if the `let` pattern
6873 matches, currently behind the 'if_let' feature gate.
6874 * 'where clauses', a more flexible syntax for specifying trait
6875 bounds that is more aesthetic, have been added for traits and
6876 free functions. Where clauses will in the future make it
6877 possible to constrain associated types, which would be
6878 impossible with the existing syntax.
6879 * A new slicing syntax (e.g. `[0..4]`) has been introduced behind
6880 the 'slicing_syntax' feature gate, and can be overloaded with
6881 the `Slice` or `SliceMut` traits.
6882 * The syntax for matching of sub-slices has been changed to use a
6883 postfix `..` instead of prefix (.e.g. `[a, b, c..]`), for
6884 consistency with other uses of `..` and to future-proof
6885 potential additional uses of the syntax.
6886 * The syntax for matching inclusive ranges in patterns has changed
6887 from `0..3` to `0...4` to be consistent with the exclusive range
6889 * Matching of sub-slices in non-tail positions (e.g. `[a.., b,
6890 c]`) has been put behind the 'advanced_slice_patterns' feature
6891 gate and may be removed in the future.
6892 * Components of tuples and tuple structs can be extracted using
6893 the `value.0` syntax, currently behind the `tuple_indexing`
6895 * The `#[crate_id]` attribute is no longer supported; versioning
6896 is handled by the package manager.
6897 * Renaming crate imports are now written `extern crate foo as bar`
6898 instead of `extern crate bar = foo`.
6899 * Renaming use statements are now written `use foo as bar` instead
6901 * `let` and `match` bindings and argument names in macros are now
6903 * The new, more efficient, closure types ('unboxed closures') have
6904 been added under a feature gate, 'unboxed_closures'. These will
6905 soon replace the existing closure types, once higher-ranked
6906 trait lifetimes are added to the language.
6907 * `move` has been added as a keyword, for indicating closures
6908 that capture by value.
6909 * Mutation and assignment is no longer allowed in pattern guards.
6910 * Generic structs and enums can now have trait bounds.
6911 * The `Share` trait is now called `Sync` to free up the term
6912 'shared' to refer to 'shared reference' (the default reference
6914 * Dynamically-sized types have been mostly implemented,
6915 unifying the behavior of fat-pointer types with the rest of the
6917 * As part of dynamically-sized types, the `Sized` trait has been
6918 introduced, which qualifying types implement by default, and
6919 which type parameters expect by default. To specify that a type
6920 parameter does not need to be sized, write `<Sized? T>`. Most
6921 types are `Sized`, notable exceptions being unsized arrays
6922 (`[T]`) and trait types.
6923 * Closures can return `!`, as in `|| -> !` or `proc() -> !`.
6924 * Lifetime bounds can now be applied to type parameters and object
6926 * The old, reference counted GC type, `Gc<T>` which was once
6927 denoted by the `@` sigil, has finally been removed. GC will be
6928 revisited in the future.
6931 * Library documentation has been improved for a number of modules.
6932 * Bit-vectors, collections::bitv has been modernized.
6933 * The url crate is deprecated in favor of
6934 http://github.com/servo/rust-url, which can be installed with
6936 * Most I/O stream types can be cloned and subsequently closed from
6938 * A `std::time::Duration` type has been added for use in I/O
6939 methods that rely on timers, as well as in the 'time' crate's
6940 `Timespec` arithmetic.
6941 * The runtime I/O abstraction layer that enabled the green thread
6942 scheduler to do non-thread-blocking I/O has been removed, along
6943 with the libuv-based implementation employed by the green thread
6944 scheduler. This will greatly simplify the future I/O work.
6945 * `collections::btree` has been rewritten to have a more
6946 idiomatic and efficient design.
6949 * rustdoc output now indicates the stability levels of API's.
6950 * The `--crate-name` flag can specify the name of the crate
6951 being compiled, like `#[crate_name]`.
6952 * The `-C metadata` specifies additional metadata to hash into
6953 symbol names, and `-C extra-filename` specifies additional
6954 information to put into the output filename, for use by the
6955 package manager for versioning.
6956 * debug info generation has continued to improve and should be
6957 more reliable under both gdb and lldb.
6958 * rustc has experimental support for compiling in parallel
6959 using the `-C codegen-units` flag.
6960 * rustc no longer encodes rpath information into binaries by
6964 * Stack usage has been optimized with LLVM lifetime annotations.
6965 * Official Rust binaries on Linux are more compatible with older
6966 kernels and distributions, built on CentOS 5.10.
6969 Version 0.11.0 (2014-07-02)
6970 ==========================
6972 * ~1700 changes, numerous bugfixes
6975 * ~[T] has been removed from the language. This type is superseded by
6977 * ~str has been removed from the language. This type is superseded by
6979 * ~T has been removed from the language. This type is superseded by the
6981 * @T has been removed from the language. This type is superseded by the
6982 standard library's std::gc::Gc<T> type.
6983 * Struct fields are now all private by default.
6984 * Vector indices and shift amounts are both required to be a `uint`
6985 instead of any integral type.
6986 * Byte character, byte string, and raw byte string literals are now all
6987 supported by prefixing the normal literal with a `b`.
6988 * Multiple ABIs are no longer allowed in an ABI string
6989 * The syntax for lifetimes on closures/procedures has been tweaked
6990 slightly: `<'a>|A, B|: 'b + K -> T`
6991 * Floating point modulus has been removed from the language; however it
6992 is still provided by a library implementation.
6993 * Private enum variants are now disallowed.
6994 * The `priv` keyword has been removed from the language.
6995 * A closure can no longer be invoked through a &-pointer.
6996 * The `use foo, bar, baz;` syntax has been removed from the language.
6997 * The transmute intrinsic no longer works on type parameters.
6998 * Statics now allow blocks/items in their definition.
6999 * Trait bounds are separated from objects with + instead of : now.
7000 * Objects can no longer be read while they are mutably borrowed.
7001 * The address of a static is now marked as insignificant unless the
7002 #[inline(never)] attribute is placed it.
7003 * The #[unsafe_destructor] attribute is now behind a feature gate.
7004 * Struct literals are no longer allowed in ambiguous positions such as
7005 if, while, match, and for..in.
7006 * Declaration of lang items and intrinsics are now feature-gated by
7008 * Integral literals no longer default to `int`, and floating point
7009 literals no longer default to `f64`. Literals must be suffixed with an
7010 appropriate type if inference cannot determine the type of the
7012 * The Box<T> type is no longer implicitly borrowed to &mut T.
7013 * Procedures are now required to not capture borrowed references.
7016 * The standard library is now a "facade" over a number of underlying
7017 libraries. This means that development on the standard library should
7018 be speedier due to smaller crates, as well as a clearer line between
7020 * A new library, libcore, lives under the standard library's facade
7021 which is Rust's "0-assumption" library, suitable for embedded and
7022 kernel development for example.
7023 * A regex crate has been added to the standard distribution. This crate
7024 includes statically compiled regular expressions.
7025 * The unwrap/unwrap_err methods on Result require a Show bound for
7026 better error messages.
7027 * The return types of the std::comm primitives have been centralized
7028 around the Result type.
7029 * A number of I/O primitives have gained the ability to time out their
7031 * A number of I/O primitives have gained the ability to close their
7032 reading/writing halves to cancel pending operations.
7033 * Reverse iterator methods have been removed in favor of `rev()` on
7034 their forward-iteration counterparts.
7035 * A bitflags! macro has been added to enable easy interop with C and
7036 management of bit flags.
7037 * A debug_assert! macro is now provided which is disabled when
7038 `--cfg ndebug` is passed to the compiler.
7039 * A graphviz crate has been added for creating .dot files.
7040 * The std::cast module has been migrated into std::mem.
7041 * The std::local_data api has been migrated from freestanding functions
7042 to being based on methods.
7043 * The Pod trait has been renamed to Copy.
7044 * jemalloc has been added as the default allocator for types.
7045 * The API for allocating memory has been changed to use proper alignment
7046 and sized deallocation
7047 * Connecting a TcpStream or binding a TcpListener is now based on a
7048 string address and a u16 port. This allows connecting to a hostname as
7050 * The Reader trait now contains a core method, read_at_least(), which
7051 correctly handles many repeated 0-length reads.
7052 * The process-spawning API is now centered around a builder-style
7054 * The :? printing qualifier has been moved from the standard library to
7055 an external libdebug crate.
7056 * Eq/Ord have been renamed to PartialEq/PartialOrd. TotalEq/TotalOrd
7057 have been renamed to Eq/Ord.
7058 * The select/plural methods have been removed from format!. The escapes
7059 for { and } have also changed from \{ and \} to {{ and }},
7061 * The TaskBuilder API has been re-worked to be a true builder, and
7062 extension traits for spawning native/green tasks have been added.
7065 * All breaking changes to the language or libraries now have their
7066 commit message annotated with `[breaking-change]` to allow for easy
7067 discovery of breaking changes.
7068 * The compiler will now try to suggest how to annotate lifetimes if a
7069 lifetime-related error occurs.
7070 * Debug info continues to be improved greatly with general bug fixes and
7071 better support for situations like link time optimization (LTO).
7072 * Usage of syntax extensions when cross-compiling has been fixed.
7073 * Functionality equivalent to GCC & Clang's -ffunction-sections,
7074 -fdata-sections and --gc-sections has been enabled by default
7075 * The compiler is now stricter about where it will load module files
7076 from when a module is declared via `mod foo;`.
7077 * The #[phase(syntax)] attribute has been renamed to #[phase(plugin)].
7078 Syntax extensions are now discovered via a "plugin registrar" type
7079 which will be extended in the future to other various plugins.
7080 * Lints have been restructured to allow for dynamically loadable lints.
7081 * A number of rustdoc improvements:
7082 * The HTML output has been visually redesigned.
7083 * Markdown is now powered by hoedown instead of sundown.
7084 * Searching heuristics have been greatly improved.
7085 * The search index has been reduced in size by a great amount.
7086 * Cross-crate documentation via `pub use` has been greatly improved.
7087 * Primitive types are now hyperlinked and documented.
7088 * Documentation has been moved from static.rust-lang.org/doc to
7090 * A new sandbox, play.rust-lang.org, is available for running and
7091 sharing rust code examples on-line.
7092 * Unused attributes are now more robustly warned about.
7093 * The dead_code lint now warns about unused struct fields.
7094 * Cross-compiling to iOS is now supported.
7095 * Cross-compiling to mipsel is now supported.
7096 * Stability attributes are now inherited by default and no longer apply
7097 to intra-crate usage, only inter-crate usage.
7098 * Error message related to non-exhaustive match expressions have been
7102 Version 0.10 (2014-04-03)
7103 =========================
7105 * ~1500 changes, numerous bugfixes
7108 * A new RFC process is now in place for modifying the language.
7109 * Patterns with `@`-pointers have been removed from the language.
7110 * Patterns with unique vectors (`~[T]`) have been removed from the
7112 * Patterns with unique strings (`~str`) have been removed from the
7114 * `@str` has been removed from the language.
7115 * `@[T]` has been removed from the language.
7116 * `@self` has been removed from the language.
7117 * `@Trait` has been removed from the language.
7118 * Headers on `~` allocations which contain `@` boxes inside the type for
7119 reference counting have been removed.
7120 * The semantics around the lifetimes of temporary expressions have changed,
7121 see #3511 and #11585 for more information.
7122 * Cross-crate syntax extensions are now possible, but feature gated. See
7123 #11151 for more information. This includes both `macro_rules!` macros as
7124 well as syntax extensions such as `format!`.
7125 * New lint modes have been added, and older ones have been turned on to be
7127 * Unnecessary parentheses
7130 * Uppercase variables
7131 * Publicly visible private types
7132 * `#[deriving]` with raw pointers
7133 * Unsafe functions can no longer be coerced to closures.
7134 * Various obscure macros such as `log_syntax!` are now behind feature gates.
7135 * The `#[simd]` attribute is now behind a feature gate.
7136 * Visibility is no longer allowed on `extern crate` statements, and
7137 unnecessary visibility (`priv`) is no longer allowed on `use` statements.
7138 * Trailing commas are now allowed in argument lists and tuple patterns.
7139 * The `do` keyword has been removed, it is now a reserved keyword.
7140 * Default type parameters have been implemented, but are feature gated.
7141 * Borrowed variables through captures in closures are now considered soundly.
7142 * `extern mod` is now `extern crate`
7143 * The `Freeze` trait has been removed.
7144 * The `Share` trait has been added for types that can be shared among
7146 * Labels in macros are now hygienic.
7147 * Expression/statement macro invocations can be delimited with `{}` now.
7148 * Treatment of types allowed in `static mut` locations has been tweaked.
7149 * The `*` and `.` operators are now overloadable through the `Deref` and
7151 * `~Trait` and `proc` no longer have `Send` bounds by default.
7152 * Partial type hints are now supported with the `_` type marker.
7153 * An `Unsafe` type was introduced for interior mutability. It is now
7154 considered undefined to transmute from `&T` to `&mut T` without using the
7156 * The #[linkage] attribute was implemented for extern statics/functions.
7157 * The inner attribute syntax has changed from `#[foo];` to `#![foo]`.
7158 * `Pod` was renamed to `Copy`.
7161 * The `libextra` library has been removed. It has now been decomposed into
7162 component libraries with smaller and more focused nuggets of
7163 functionality. The full list of libraries can be found on the
7164 documentation index page.
7165 * std: `std::condition` has been removed. All I/O errors are now propagated
7166 through the `Result` type. In order to assist with error handling, a
7167 `try!` macro for unwrapping errors with an early return and a lint for
7168 unused results has been added. See #12039 for more information.
7169 * std: The `vec` module has been renamed to `slice`.
7170 * std: A new vector type, `Vec<T>`, has been added in preparation for DST.
7171 This will become the only growable vector in the future.
7172 * std: `std::io` now has more public re-exports. Types such as `BufferedReader`
7173 are now found at `std::io::BufferedReader` instead of
7174 `std::io::buffered::BufferedReader`.
7175 * std: `print` and `println` are no longer in the prelude, the `print!` and
7176 `println!` macros are intended to be used instead.
7177 * std: `Rc` now has a `Weak` pointer for breaking cycles, and it no longer
7178 attempts to statically prevent cycles.
7179 * std: The standard distribution is adopting the policy of pushing failure
7180 to the user rather than failing in libraries. Many functions (such as
7181 `slice::last()`) now return `Option<T>` instead of `T` + failing.
7182 * std: `fmt::Default` has been renamed to `fmt::Show`, and it now has a new
7183 deriving mode: `#[deriving(Show)]`.
7184 * std: `ToStr` is now implemented for all types implementing `Show`.
7185 * std: The formatting trait methods now take `&self` instead of `&T`
7186 * std: The `invert()` method on iterators has been renamed to `rev()`
7187 * std: `std::num` has seen a reduction in the genericity of its traits,
7188 consolidating functionality into a few core traits.
7189 * std: Backtraces are now printed on task failure if the environment
7190 variable `RUST_BACKTRACE` is present.
7191 * std: Naming conventions for iterators have been standardized. More details
7192 can be found on the wiki's style guide.
7193 * std: `eof()` has been removed from the `Reader` trait. Specific types may
7194 still implement the function.
7195 * std: Networking types are now cloneable to allow simultaneous reads/writes.
7196 * std: `assert_approx_eq!` has been removed
7197 * std: The `e` and `E` formatting specifiers for floats have been added to
7198 print them in exponential notation.
7199 * std: The `Times` trait has been removed
7200 * std: Indications of variance and opting out of builtin bounds is done
7201 through marker types in `std::kinds::marker` now
7202 * std: `hash` has been rewritten, `IterBytes` has been removed, and
7203 `#[deriving(Hash)]` is now possible.
7204 * std: `SharedChan` has been removed, `Sender` is now cloneable.
7205 * std: `Chan` and `Port` were renamed to `Sender` and `Receiver`.
7206 * std: `Chan::new` is now `channel()`.
7207 * std: A new synchronous channel type has been implemented.
7208 * std: A `select!` macro is now provided for selecting over `Receiver`s.
7209 * std: `hashmap` and `trie` have been moved to `libcollections`
7210 * std: `run` has been rolled into `io::process`
7211 * std: `assert_eq!` now uses `{}` instead of `{:?}`
7212 * std: The equality and comparison traits have seen some reorganization.
7213 * std: `rand` has moved to `librand`.
7214 * std: `to_{lower,upper}case` has been implemented for `char`.
7215 * std: Logging has been moved to `liblog`.
7216 * collections: `HashMap` has been rewritten for higher performance and less
7218 * native: The default runtime is now `libnative`. If `libgreen` is desired,
7219 it can be booted manually. The runtime guide has more information and
7221 * native: All I/O functionality except signals has been implemented.
7222 * green: Task spawning with `libgreen` has been optimized with stack caching
7223 and various trimming of code.
7224 * green: Tasks spawned by `libgreen` now have an unmapped guard page.
7225 * sync: The `extra::sync` module has been updated to modern rust (and moved
7226 to the `sync` library), tweaking and improving various interfaces while
7227 dropping redundant functionality.
7228 * sync: A new `Barrier` type has been added to the `sync` library.
7229 * sync: An efficient mutex for native and green tasks has been implemented.
7230 * serialize: The `base64` module has seen some improvement. It treats
7231 newlines better, has non-string error values, and has seen general
7233 * fourcc: A `fourcc!` macro was introduced
7234 * hexfloat: A `hexfloat!` macro was implemented for specifying floats via a
7235 hexadecimal literal.
7238 * `rustpkg` has been deprecated and removed from the main repository. Its
7239 replacement, `cargo`, is under development.
7240 * Nightly builds of rust are now available
7241 * The memory usage of rustc has been improved many times throughout this
7243 * The build process supports disabling rpath support for the rustc binary
7245 * Code generation has improved in some cases, giving more information to the
7246 LLVM optimization passes to enable more extensive optimizations.
7247 * Debuginfo compatibility with lldb on OSX has been restored.
7248 * The master branch is now gated on an android bot, making building for
7249 android much more reliable.
7250 * Output flags have been centralized into one `--emit` flag.
7251 * Crate type flags have been centralized into one `--crate-type` flag.
7252 * Codegen flags have been consolidated behind a `-C` flag.
7253 * Linking against outdated crates now has improved error messages.
7254 * Error messages with lifetimes will often suggest how to annotate the
7255 function to fix the error.
7256 * Many more types are documented in the standard library, and new guides
7258 * Many `rustdoc` improvements:
7259 * code blocks are syntax highlighted.
7260 * render standalone markdown files.
7261 * the --test flag tests all code blocks by default.
7262 * exported macros are displayed.
7263 * re-exported types have their documentation inlined at the location of the
7265 * search works across crates that have been rendered to the same output
7269 Version 0.9 (2014-01-09)
7270 ==========================
7272 * ~1800 changes, numerous bugfixes
7275 * The `float` type has been removed. Use `f32` or `f64` instead.
7276 * A new facility for enabling experimental features (feature gating) has
7277 been added, using the crate-level `#[feature(foo)]` attribute.
7278 * Managed boxes (@) are now behind a feature gate
7279 (`#[feature(managed_boxes)]`) in preparation for future removal. Use the
7280 standard library's `Gc` or `Rc` types instead.
7281 * `@mut` has been removed. Use `std::cell::{Cell, RefCell}` instead.
7282 * Jumping back to the top of a loop is now done with `continue` instead of
7284 * Strings can no longer be mutated through index assignment.
7285 * Raw strings can be created via the basic `r"foo"` syntax or with matched
7286 hash delimiters, as in `r###"foo"###`.
7287 * `~fn` is now written `proc (args) -> retval { ... }` and may only be
7289 * The `&fn` type is now written `|args| -> ret` to match the literal form.
7290 * `@fn`s have been removed.
7291 * `do` only works with procs in order to make it obvious what the cost
7293 * Single-element tuple-like structs can no longer be dereferenced to
7294 obtain the inner value. A more comprehensive solution for overloading
7295 the dereference operator will be provided in the future.
7296 * The `#[link(...)]` attribute has been replaced with
7297 `#[crate_id = "name#vers"]`.
7298 * Empty `impl`s must be terminated with empty braces and may not be
7299 terminated with a semicolon.
7300 * Keywords are no longer allowed as lifetime names; the `self` lifetime
7301 no longer has any special meaning.
7302 * The old `fmt!` string formatting macro has been removed.
7303 * `printf!` and `printfln!` (old-style formatting) removed in favor of
7304 `print!` and `println!`.
7305 * `mut` works in patterns now, as in `let (mut x, y) = (1, 2);`.
7306 * The `extern mod foo (name = "bar")` syntax has been removed. Use
7307 `extern mod foo = "bar"` instead.
7308 * New reserved keywords: `alignof`, `offsetof`, `sizeof`.
7309 * Macros can have attributes.
7310 * Macros can expand to items with attributes.
7311 * Macros can expand to multiple items.
7312 * The `asm!` macro is feature-gated (`#[feature(asm)]`).
7313 * Comments may be nested.
7314 * Values automatically coerce to trait objects they implement, without
7316 * Enum discriminants are no longer an entire word but as small as needed to
7317 contain all the variants. The `repr` attribute can be used to override
7318 the discriminant size, as in `#[repr(int)]` for integer-sized, and
7319 `#[repr(C)]` to match C enums.
7320 * Non-string literals are not allowed in attributes (they never worked).
7321 * The FFI now supports variadic functions.
7322 * Octal numeric literals, as in `0o7777`.
7323 * The `concat!` syntax extension performs compile-time string concatenation.
7324 * The `#[fixed_stack_segment]` and `#[rust_stack]` attributes have been
7325 removed as Rust no longer uses segmented stacks.
7326 * Non-ascii identifiers are feature-gated (`#[feature(non_ascii_idents)]`).
7327 * Ignoring all fields of an enum variant or tuple-struct is done with `..`,
7328 not `*`; ignoring remaining fields of a struct is also done with `..`,
7329 not `_`; ignoring a slice of a vector is done with `..`, not `.._`.
7330 * `rustc` supports the "win64" calling convention via `extern "win64"`.
7331 * `rustc` supports the "system" calling convention, which defaults to the
7332 preferred convention for the target platform, "stdcall" on 32-bit Windows,
7334 * The `type_overflow` lint (default: warn) checks literals for overflow.
7335 * The `unsafe_block` lint (default: allow) checks for usage of `unsafe`.
7336 * The `attribute_usage` lint (default: warn) warns about unknown
7338 * The `unknown_features` lint (default: warn) warns about unknown
7340 * The `dead_code` lint (default: warn) checks for dead code.
7341 * Rust libraries can be linked statically to one another
7342 * `#[link_args]` is behind the `link_args` feature gate.
7343 * Native libraries are now linked with `#[link(name = "foo")]`
7344 * Native libraries can be statically linked to a rust crate
7345 (`#[link(name = "foo", kind = "static")]`).
7346 * Native OS X frameworks are now officially supported
7347 (`#[link(name = "foo", kind = "framework")]`).
7348 * The `#[thread_local]` attribute creates thread-local (not task-local)
7349 variables. Currently behind the `thread_local` feature gate.
7350 * The `return` keyword may be used in closures.
7351 * Types that can be copied via a memcpy implement the `Pod` kind.
7352 * The `cfg` attribute can now be used on struct fields and enum variants.
7355 * std: The `option` and `result` API's have been overhauled to make them
7356 simpler, more consistent, and more composable.
7357 * std: The entire `std::io` module has been replaced with one that is
7358 more comprehensive and that properly interfaces with the underlying
7359 scheduler. File, TCP, UDP, Unix sockets, pipes, and timers are all
7361 * std: `io::util` contains a number of useful implementations of
7362 `Reader` and `Writer`, including `NullReader`, `NullWriter`,
7363 `ZeroReader`, `TeeReader`.
7364 * std: The reference counted pointer type `extra::rc` moved into std.
7365 * std: The `Gc` type in the `gc` module will replace `@` (it is currently
7366 just a wrapper around it).
7367 * std: The `Either` type has been removed.
7368 * std: `fmt::Default` can be implemented for any type to provide default
7369 formatting to the `format!` macro, as in `format!("{}", myfoo)`.
7370 * std: The `rand` API continues to be tweaked.
7371 * std: The `rust_begin_unwind` function, useful for inserting breakpoints
7372 on failure in gdb, is now named `rust_fail`.
7373 * std: The `each_key` and `each_value` methods on `HashMap` have been
7374 replaced by the `keys` and `values` iterators.
7375 * std: Functions dealing with type size and alignment have moved from the
7376 `sys` module to the `mem` module.
7377 * std: The `path` module was written and API changed.
7378 * std: `str::from_utf8` has been changed to cast instead of allocate.
7379 * std: `starts_with` and `ends_with` methods added to vectors via the
7380 `ImmutableEqVector` trait, which is in the prelude.
7381 * std: Vectors can be indexed with the `get_opt` method, which returns `None`
7382 if the index is out of bounds.
7383 * std: Task failure no longer propagates between tasks, as the model was
7384 complex, expensive, and incompatible with thread-based tasks.
7385 * std: The `Any` type can be used for dynamic typing.
7386 * std: `~Any` can be passed to the `fail!` macro and retrieved via
7388 * std: Methods that produce iterators generally do not have an `_iter`
7390 * std: `cell::Cell` and `cell::RefCell` can be used to introduce mutability
7391 roots (mutable fields, etc.). Use instead of e.g. `@mut`.
7392 * std: `util::ignore` renamed to `prelude::drop`.
7393 * std: Slices have `sort` and `sort_by` methods via the `MutableVector`
7395 * std: `vec::raw` has seen a lot of cleanup and API changes.
7396 * std: The standard library no longer includes any C++ code, and very
7397 minimal C, eliminating the dependency on libstdc++.
7398 * std: Runtime scheduling and I/O functionality has been factored out into
7399 extensible interfaces and is now implemented by two different crates:
7400 libnative, for native threading and I/O; and libgreen, for green threading
7401 and I/O. This paves the way for using the standard library in more limited
7402 embedded environments.
7403 * std: The `comm` module has been rewritten to be much faster, have a
7404 simpler, more consistent API, and to work for both native and green
7406 * std: All libuv dependencies have been moved into the rustuv crate.
7407 * native: New implementations of runtime scheduling on top of OS threads.
7408 * native: New native implementations of TCP, UDP, file I/O, process spawning,
7410 * green: The green thread scheduler and message passing types are almost
7412 * extra: The `flatpipes` module had bitrotted and was removed.
7413 * extra: All crypto functions have been removed and Rust now has a policy of
7414 not reimplementing crypto in the standard library. In the future crypto
7415 will be provided by external crates with bindings to established libraries.
7416 * extra: `c_vec` has been modernized.
7417 * extra: The `sort` module has been removed. Use the `sort` method on
7421 * The `rust` and `rusti` commands have been removed, due to lack of
7423 * `rustdoc` was completely rewritten.
7424 * `rustdoc` can test code examples in documentation.
7425 * `rustpkg` can test packages with the argument, 'test'.
7426 * `rustpkg` supports arbitrary dependencies, including C libraries.
7427 * `rustc`'s support for generating debug info is improved again.
7428 * `rustc` has better error reporting for unbalanced delimiters.
7429 * `rustc`'s JIT support was removed due to bitrot.
7430 * Executables and static libraries can be built with LTO (-Z lto)
7431 * `rustc` adds a `--dep-info` flag for communicating dependencies to
7435 Version 0.8 (2013-09-26)
7436 ============================
7438 * ~2200 changes, numerous bugfixes
7441 * The `for` loop syntax has changed to work with the `Iterator` trait.
7442 * At long last, unwinding works on Windows.
7443 * Default methods are ready for use.
7444 * Many trait inheritance bugs fixed.
7445 * Owned and borrowed trait objects work more reliably.
7446 * `copy` is no longer a keyword. It has been replaced by the `Clone` trait.
7447 * rustc can omit emission of code for the `debug!` macro if it is passed
7449 * mod.rs is now "blessed". When loading `mod foo;`, rustc will now look
7450 for foo.rs, then foo/mod.rs, and will generate an error when both are
7452 * Strings no longer contain trailing nulls. The new `std::c_str` module
7453 provides new mechanisms for converting to C strings.
7454 * The type of foreign functions is now `extern "C" fn` instead of `*u8'.
7455 * The FFI has been overhauled such that foreign functions are called directly,
7456 instead of through a stack-switching wrapper.
7457 * Calling a foreign function must be done through a Rust function with the
7458 `#[fixed_stack_segment]` attribute.
7459 * The `externfn!` macro can be used to declare both a foreign function and
7460 a `#[fixed_stack_segment]` wrapper at once.
7461 * `pub` and `priv` modifiers on `extern` blocks are no longer parsed.
7462 * `unsafe` is no longer allowed on extern fns - they are all unsafe.
7463 * `priv` is disallowed everywhere except for struct fields and enum variants.
7464 * `&T` (besides `&'static T`) is no longer allowed in `@T`.
7465 * `ref` bindings in irrefutable patterns work correctly now.
7466 * `char` is now prevented from containing invalid code points.
7467 * Casting to `bool` is no longer allowed.
7468 * `\0` is now accepted as an escape in chars and strings.
7469 * `yield` is a reserved keyword.
7470 * `typeof` is a reserved keyword.
7471 * Crates may be imported by URL with `extern mod foo = "url";`.
7472 * Explicit enum discriminants may be given as uints as in `enum E { V = 0u }`
7473 * Static vectors can be initialized with repeating elements,
7474 e.g. `static foo: [u8, .. 100]: [0, .. 100];`.
7475 * Static structs can be initialized with functional record update,
7476 e.g. `static foo: Foo = Foo { a: 5, .. bar };`.
7477 * `cfg!` can be used to conditionally execute code based on the crate
7478 configuration, similarly to `#[cfg(...)]`.
7479 * The `unnecessary_qualification` lint detects unneeded module
7480 prefixes (default: allow).
7481 * Arithmetic operations have been implemented on the SIMD types in
7482 `std::unstable::simd`.
7483 * Exchange allocation headers were removed, reducing memory usage.
7484 * `format!` implements a completely new, extensible, and higher-performance
7485 string formatting system. It will replace `fmt!`.
7486 * `print!` and `println!` write formatted strings (using the `format!`
7487 extension) to stdout.
7488 * `write!` and `writeln!` write formatted strings (using the `format!`
7489 extension) to the new Writers in `std::rt::io`.
7490 * The library section in which a function or static is placed may
7491 be specified with `#[link_section = "..."]`.
7492 * The `proto!` syntax extension for defining bounded message protocols
7494 * `macro_rules!` is hygienic for `let` declarations.
7495 * The `#[export_name]` attribute specifies the name of a symbol.
7496 * `unreachable!` can be used to indicate unreachable code, and fails
7500 * std: Transitioned to the new runtime, written in Rust.
7501 * std: Added an experimental I/O library, `rt::io`, based on the new
7503 * std: A new generic `range` function was added to the prelude, replacing
7504 `uint::range` and friends.
7505 * std: `range_rev` no longer exists. Since range is an iterator it can be
7506 reversed with `range(lo, hi).invert()`.
7507 * std: The `chain` method on option renamed to `and_then`; `unwrap_or_default`
7508 renamed to `unwrap_or`.
7509 * std: The `iterator` module was renamed to `iter`.
7510 * std: Integral types now support the `checked_add`, `checked_sub`, and
7511 `checked_mul` operations for detecting overflow.
7512 * std: Many methods in `str`, `vec`, `option, `result` were renamed for
7514 * std: Methods are standardizing on conventions for casting methods:
7515 `to_foo` for copying, `into_foo` for moving, `as_foo` for temporary
7517 * std: The `CString` type in `c_str` provides new ways to convert to and
7519 * std: `DoubleEndedIterator` can yield elements in two directions.
7520 * std: The `mut_split` method on vectors partitions an `&mut [T]` into
7522 * std: `str::from_bytes` renamed to `str::from_utf8`.
7523 * std: `pop_opt` and `shift_opt` methods added to vectors.
7524 * std: The task-local data interface no longer uses @, and keys are
7525 no longer function pointers.
7526 * std: The `swap_unwrap` method of `Option` renamed to `take_unwrap`.
7527 * std: Added `SharedPort` to `comm`.
7528 * std: `Eq` has a default method for `ne`; only `eq` is required
7530 * std: `Ord` has default methods for `le`, `gt` and `ge`; only `lt`
7531 is required in implementations.
7532 * std: `is_utf8` performance is improved, impacting many string functions.
7533 * std: `os::MemoryMap` provides cross-platform mmap.
7534 * std: `ptr::offset` is now unsafe, but also more optimized. Offsets that
7535 are not 'in-bounds' are considered undefined.
7536 * std: Many freestanding functions in `vec` removed in favor of methods.
7537 * std: Many freestanding functions on scalar types removed in favor of
7539 * std: Many options to task builders were removed since they don't make
7540 sense in the new scheduler design.
7541 * std: More containers implement `FromIterator` so can be created by the
7543 * std: More complete atomic types in `unstable::atomics`.
7544 * std: `comm::PortSet` removed.
7545 * std: Mutating methods in the `Set` and `Map` traits have been moved into
7546 the `MutableSet` and `MutableMap` traits. `Container::is_empty`,
7547 `Map::contains_key`, `MutableMap::insert`, and `MutableMap::remove` have
7548 default implementations.
7549 * std: Various `from_str` functions were removed in favor of a generic
7550 `from_str` which is available in the prelude.
7551 * std: `util::unreachable` removed in favor of the `unreachable!` macro.
7552 * extra: `dlist`, the doubly-linked list was modernized.
7553 * extra: Added a `hex` module with `ToHex` and `FromHex` traits.
7554 * extra: Added `glob` module, replacing `std::os::glob`.
7555 * extra: `rope` was removed.
7556 * extra: `deque` was renamed to `ringbuf`. `RingBuf` implements `Deque`.
7557 * extra: `net`, and `timer` were removed. The experimental replacements
7558 are `std::rt::io::net` and `std::rt::io::timer`.
7559 * extra: Iterators implemented for `SmallIntMap`.
7560 * extra: Iterators implemented for `Bitv` and `BitvSet`.
7561 * extra: `SmallIntSet` removed. Use `BitvSet`.
7562 * extra: Performance of JSON parsing greatly improved.
7563 * extra: `semver` updated to SemVer 2.0.0.
7564 * extra: `term` handles more terminals correctly.
7565 * extra: `dbg` module removed.
7566 * extra: `par` module removed.
7567 * extra: `future` was cleaned up, with some method renames.
7568 * extra: Most free functions in `getopts` were converted to methods.
7571 * rustc's debug info generation (`-Z debug-info`) is greatly improved.
7572 * rustc accepts `--target-cpu` to compile to a specific CPU architecture,
7573 similarly to gcc's `--march` flag.
7574 * rustc's performance compiling small crates is much better.
7575 * rustpkg has received many improvements.
7576 * rustpkg supports git tags as package IDs.
7577 * rustpkg builds into target-specific directories so it can be used for
7579 * The number of concurrent test tasks is controlled by the environment
7580 variable RUST_TEST_TASKS.
7581 * The test harness can now report metrics for benchmarks.
7582 * All tools have man pages.
7583 * Programs compiled with `--test` now support the `-h` and `--help` flags.
7584 * The runtime uses jemalloc for allocations.
7585 * Segmented stacks are temporarily disabled as part of the transition to
7586 the new runtime. Stack overflows are possible!
7587 * A new documentation backend, rustdoc_ng, is available for use. It is
7588 still invoked through the normal `rustdoc` command.
7591 Version 0.7 (2013-07-03)
7592 =======================
7594 * ~2000 changes, numerous bugfixes
7597 * `impl`s no longer accept a visibility qualifier. Put them on methods
7599 * The borrow checker has been rewritten with flow-sensitivity, fixing
7600 many bugs and inconveniences.
7601 * The `self` parameter no longer implicitly means `&'self self`,
7602 and can be explicitly marked with a lifetime.
7603 * Overloadable compound operators (`+=`, etc.) have been temporarily
7604 removed due to bugs.
7605 * The `for` loop protocol now requires `for`-iterators to return `bool`
7606 so they compose better.
7607 * The `Durable` trait is replaced with the `'static` bounds.
7608 * Trait default methods work more often.
7609 * Structs with the `#[packed]` attribute have byte alignment and
7610 no padding between fields.
7611 * Type parameters bound by `Copy` must now be copied explicitly with
7613 * It is now illegal to move out of a dereferenced unsafe pointer.
7614 * `Option<~T>` is now represented as a nullable pointer.
7615 * `@mut` does dynamic borrow checks correctly.
7616 * The `main` function is only detected at the topmost level of the crate.
7617 The `#[main]` attribute is still valid anywhere.
7618 * Struct fields may no longer be mutable. Use inherited mutability.
7619 * The `#[no_send]` attribute makes a type that would otherwise be
7621 * The `#[no_freeze]` attribute makes a type that would otherwise be
7623 * Unbounded recursion will abort the process after reaching the limit
7624 specified by the `RUST_MAX_STACK` environment variable (default: 1GB).
7625 * The `vecs_implicitly_copyable` lint mode has been removed. Vectors
7626 are never implicitly copyable.
7627 * `#[static_assert]` makes compile-time assertions about static bools.
7628 * At long last, 'argument modes' no longer exist.
7629 * The rarely used `use mod` statement no longer exists.
7632 * `fail!` and `assert!` accept `~str`, `&'static str` or `fmt!`-style
7634 * `Encodable`, `Decodable`, `Ord`, `TotalOrd`, `TotalEq`, `DeepClone`,
7635 `Rand`, `Zero` and `ToStr` can all be automatically derived with
7637 * The `bytes!` macro returns a vector of bytes for string, u8, char,
7638 and unsuffixed integer literals.
7641 * The `core` crate was renamed to `std`.
7642 * The `std` crate was renamed to `extra`.
7643 * More and improved documentation.
7644 * std: `iterator` module for external iterator objects.
7645 * Many old-style (internal, higher-order function) iterators replaced by
7646 implementations of `Iterator`.
7647 * std: Many old internal vector and string iterators,
7648 incl. `any`, `all`. removed.
7649 * std: The `finalize` method of `Drop` renamed to `drop`.
7650 * std: The `drop` method now takes `&mut self` instead of `&self`.
7651 * std: The prelude no longer re-exports any modules, only types and traits.
7652 * std: Prelude additions: `print`, `println`, `FromStr`, `ApproxEq`, `Equiv`,
7653 `Iterator`, `IteratorUtil`, many numeric traits, many tuple traits.
7654 * std: New numeric traits: `Fractional`, `Real`, `RealExt`, `Integer`, `Ratio`,
7655 `Algebraic`, `Trigonometric`, `Exponential`, `Primitive`.
7656 * std: Tuple traits and accessors defined for up to 12-tuples, e.g.
7657 `(0, 1, 2).n2()` or `(0, 1, 2).n2_ref()`.
7658 * std: Many types implement `Clone`.
7659 * std: `path` type renamed to `Path`.
7660 * std: `mut` module and `Mut` type removed.
7661 * std: Many standalone functions removed in favor of methods and iterators
7662 in `vec`, `str`. In the future methods will also work as functions.
7663 * std: `reinterpret_cast` removed. Use `transmute`.
7664 * std: ascii string handling in `std::ascii`.
7665 * std: `Rand` is implemented for ~/@.
7666 * std: `run` module for spawning processes overhauled.
7667 * std: Various atomic types added to `unstable::atomic`.
7668 * std: Various types implement `Zero`.
7669 * std: `LinearMap` and `LinearSet` renamed to `HashMap` and `HashSet`.
7670 * std: Borrowed pointer functions moved from `ptr` to `borrow`.
7671 * std: Added `os::mkdir_recursive`.
7672 * std: Added `os::glob` function performs filesystems globs.
7673 * std: `FuzzyEq` renamed to `ApproxEq`.
7674 * std: `Map` now defines `pop` and `swap` methods.
7675 * std: `Cell` constructors converted to static methods.
7676 * extra: `rc` module adds the reference counted pointers, `Rc` and `RcMut`.
7677 * extra: `flate` module moved from `std` to `extra`.
7678 * extra: `fileinput` module for iterating over a series of files.
7679 * extra: `Complex` number type and `complex` module.
7680 * extra: `Rational` number type and `rational` module.
7681 * extra: `BigInt`, `BigUint` implement numeric and comparison traits.
7682 * extra: `term` uses terminfo now, is more correct.
7683 * extra: `arc` functions converted to methods.
7684 * extra: Implementation of fixed output size variations of SHA-2.
7687 * `unused_variable` lint mode for unused variables (default: warn).
7688 * `unused_unsafe` lint mode for detecting unnecessary `unsafe` blocks
7690 * `unused_mut` lint mode for identifying unused `mut` qualifiers
7692 * `dead_assignment` lint mode for unread variables (default: warn).
7693 * `unnecessary_allocation` lint mode detects some heap allocations that are
7694 immediately borrowed so could be written without allocating (default: warn).
7695 * `missing_doc` lint mode (default: allow).
7696 * `unreachable_code` lint mode (default: warn).
7697 * The `rusti` command has been rewritten and a number of bugs addressed.
7698 * rustc outputs in color on more terminals.
7699 * rustc accepts a `--link-args` flag to pass arguments to the linker.
7700 * rustc accepts a `-Z print-link-args` flag for debugging linkage.
7701 * Compiling with `-g` will make the binary record information about
7702 dynamic borrowcheck failures for debugging.
7703 * rustdoc has a nicer stylesheet.
7704 * Various improvements to rustdoc.
7705 * Improvements to rustpkg (see the detailed release notes).
7708 Version 0.6 (2013-04-03)
7709 ========================
7711 * ~2100 changes, numerous bugfixes
7714 * The self type parameter in traits is now spelled `Self`
7715 * The `self` parameter in trait and impl methods must now be explicitly
7716 named (for example: `fn f(&self) { }`). Implicit self is deprecated.
7717 * Static methods no longer require the `static` keyword and instead
7718 are distinguished by the lack of a `self` parameter
7719 * Replaced the `Durable` trait with the `'static` lifetime
7720 * The old closure type syntax with the trailing sigil has been
7721 removed in favor of the more consistent leading sigil
7722 * `super` is a keyword, and may be prefixed to paths
7723 * Trait bounds are separated with `+` instead of whitespace
7724 * Traits are implemented with `impl Trait for Type`
7725 instead of `impl Type: Trait`
7726 * Lifetime syntax is now `&'l foo` instead of `&l/foo`
7727 * The `export` keyword has finally been removed
7728 * The `move` keyword has been removed (see "Semantic changes")
7729 * The interior mutability qualifier on vectors, `[mut T]`, has been
7730 removed. Use `&mut [T]`, etc.
7731 * `mut` is no longer valid in `~mut T`. Use inherited mutability
7732 * `fail` is no longer a keyword. Use `fail!()`
7733 * `assert` is no longer a keyword. Use `assert!()`
7734 * `log` is no longer a keyword. use `debug!`, etc.
7735 * 1-tuples may be represented as `(T,)`
7736 * Struct fields may no longer be `mut`. Use inherited mutability,
7737 `@mut T`, `core::mut` or `core::cell`
7738 * `extern mod { ... }` is no longer valid syntax for foreign
7739 function modules. Use extern blocks: `extern { ... }`
7740 * Newtype enums removed. Use tuple-structs.
7741 * Trait implementations no longer support visibility modifiers
7742 * Pattern matching over vectors improved and expanded
7743 * `const` renamed to `static` to correspond to lifetime name,
7744 and make room for future `static mut` unsafe mutable globals.
7745 * Replaced `#[deriving_eq]` with `#[deriving(Eq)]`, etc.
7746 * `Clone` implementations can be automatically generated with
7747 `#[deriving(Clone)]`
7748 * Casts to traits must use a pointer sigil, e.g. `@foo as @Bar`
7749 instead of `foo as Bar`.
7750 * Fixed length vector types are now written as `[int, .. 3]`
7751 instead of `[int * 3]`.
7752 * Fixed length vector types can express the length as a constant
7753 expression. (ex: `[int, .. GL_BUFFER_SIZE - 2]`)
7756 * Types with owned pointers or custom destructors move by default,
7757 eliminating the `move` keyword
7758 * All foreign functions are considered unsafe
7759 * &mut is now unaliasable
7760 * Writes to borrowed @mut pointers are prevented dynamically
7762 * The name of the main function can be customized using #[main]
7763 * The default type of an inferred closure is &fn instead of @fn
7764 * `use` statements may no longer be "chained" - they cannot import
7765 identifiers imported by previous `use` statements
7766 * `use` statements are crate relative, importing from the "top"
7767 of the crate by default. Paths may be prefixed with `super::`
7768 or `self::` to change the search behavior.
7769 * Method visibility is inherited from the implementation declaration
7770 * Structural records have been removed
7771 * Many more types can be used in static items, including enums
7772 'static-lifetime pointers and vectors
7773 * Pattern matching over vectors improved and expanded
7774 * Typechecking of closure types has been overhauled to
7775 improve inference and eliminate unsoundness
7776 * Macros leave scope at the end of modules, unless that module is
7777 tagged with #[macro_escape]
7780 * Added big integers to `std::bigint`
7781 * Removed `core::oldcomm` module
7782 * Added pipe-based `core::comm` module
7783 * Numeric traits have been reorganized under `core::num`
7784 * `vec::slice` finally returns a slice
7785 * `debug!` and friends don't require a format string, e.g. `debug!(Foo)`
7786 * Containers reorganized around traits in `core::container`
7787 * `core::dvec` removed, `~[T]` is a drop-in replacement
7788 * `core::send_map` renamed to `core::hashmap`
7789 * `std::map` removed; replaced with `core::hashmap`
7790 * `std::treemap` reimplemented as an owned balanced tree
7791 * `std::deque` and `std::smallintmap` reimplemented as owned containers
7792 * `core::trie` added as a fast ordered map for integer keys
7793 * Set types added to `core::hashmap`, `core::trie` and `std::treemap`
7794 * `Ord` split into `Ord` and `TotalOrd`. `Ord` is still used to
7795 overload the comparison operators, whereas `TotalOrd` is used
7796 by certain container types
7799 * Replaced the 'cargo' package manager with 'rustpkg'
7800 * Added all-purpose 'rust' tool
7801 * `rustc --test` now supports benchmarks with the `#[bench]` attribute
7802 * rustc now *attempts* to offer spelling suggestions
7803 * Improved support for ARM and Android
7804 * Preliminary MIPS backend
7805 * Improved foreign function ABI implementation for x86, x86_64
7806 * Various memory usage improvements
7807 * Rust code may be embedded in foreign code under limited circumstances
7808 * Inline assembler supported by new asm!() syntax extension.
7811 Version 0.5 (2012-12-21)
7812 ===========================
7814 * ~900 changes, numerous bugfixes
7817 * Removed `<-` move operator
7818 * Completed the transition from the `#fmt` extension syntax to `fmt!`
7819 * Removed old fixed length vector syntax - `[T]/N`
7820 * New token-based quasi-quoters, `quote_tokens!`, `quote_expr!`, etc.
7821 * Macros may now expand to items and statements
7822 * `a.b()` is always parsed as a method call, never as a field projection
7823 * `Eq` and `IterBytes` implementations can be automatically generated
7824 with `#[deriving_eq]` and `#[deriving_iter_bytes]` respectively
7825 * Removed the special crate language for `.rc` files
7826 * Function arguments may consist of any irrefutable pattern
7829 * `&` and `~` pointers may point to objects
7830 * Tuple structs - `struct Foo(Bar, Baz)`. Will replace newtype enums.
7831 * Enum variants may be structs
7832 * Destructors can be added to all nominal types with the Drop trait
7833 * Structs and nullary enum variants may be constants
7834 * Values that cannot be implicitly copied are now automatically moved
7835 without writing `move` explicitly
7836 * `&T` may now be coerced to `*T`
7837 * Coercions happen in `let` statements as well as function calls
7838 * `use` statements now take crate-relative paths
7839 * The module and type namespaces have been merged so that static
7840 method names can be resolved under the trait in which they are
7843 * Improved support for language features
7844 * Trait inheritance works in many scenarios
7845 * More support for explicit self arguments in methods - `self`, `&self`
7846 `@self`, and `~self` all generally work as expected
7847 * Static methods work in more situations
7848 * Experimental: Traits may declare default methods for the implementations
7852 * New condition handling system in `core::condition`
7853 * Timsort added to `std::sort`
7854 * New priority queue, `std::priority_queue`
7855 * Pipes for serializable types, `std::flatpipes'
7856 * Serialization overhauled to be trait-based
7857 * Expanded `getopts` definitions
7858 * Moved futures to `std`
7859 * More functions are pure now
7860 * `core::comm` renamed to `oldcomm`. Still deprecated
7861 * `rustdoc` and `cargo` are libraries now
7864 * Added a preliminary REPL, `rusti`
7865 * License changed from MIT to dual MIT/APL2
7868 Version 0.4 (2012-10-15)
7869 ==========================
7871 * ~2000 changes, numerous bugfixes
7874 * All keywords are now strict and may not be used as identifiers anywhere
7875 * Keyword removal: 'again', 'import', 'check', 'new', 'owned', 'send',
7876 'of', 'with', 'to', 'class'.
7877 * Classes are replaced with simpler structs
7878 * Explicit method self types
7879 * `ret` became `return` and `alt` became `match`
7880 * `import` is now `use`; `use is now `extern mod`
7881 * `extern mod { ... }` is now `extern { ... }`
7882 * `use mod` is the recommended way to import modules
7883 * `pub` and `priv` replace deprecated export lists
7884 * The syntax of `match` pattern arms now uses fat arrow (=>)
7885 * `main` no longer accepts an args vector; use `os::args` instead
7888 * Trait implementations are now coherent, ala Haskell typeclasses
7889 * Trait methods may be static
7890 * Argument modes are deprecated
7891 * Borrowed pointers are much more mature and recommended for use
7892 * Strings and vectors in the static region are stored in constant memory
7893 * Typestate was removed
7894 * Resolution rewritten to be more reliable
7895 * Support for 'dual-mode' data structures (freezing and thawing)
7898 * Most binary operators can now be overloaded via the traits in
7900 * `std::net::url` for representing URLs
7901 * Sendable hash maps in `core::send_map`
7902 * `core::task' gained a (currently unsafe) task-local storage API
7905 * An efficient new intertask communication primitive called the pipe,
7906 along with a number of higher-level channel types, in `core::pipes`
7907 * `std::arc`, an atomically reference counted, immutable, shared memory
7909 * `std::sync`, various exotic synchronization tools based on arcs and pipes
7910 * Futures are now based on pipes and sendable
7911 * More robust linked task failure
7912 * Improved task builder API
7915 * Improved error reporting
7916 * Preliminary JIT support
7917 * Preliminary work on precise GC
7918 * Extensive architectural improvements to rustc
7919 * Begun a transition away from buggy C++-based reflection (shape) code to
7920 Rust-based (visitor) code
7921 * All hash functions and tables converted to secure, randomized SipHash
7924 Version 0.3 (2012-07-12)
7925 ========================
7927 * ~1900 changes, numerous bugfixes
7929 * New coding conveniences
7930 * Integer-literal suffix inference
7931 * Per-item control over warnings, errors
7932 * #[cfg(windows)] and #[cfg(unix)] attributes
7933 * Documentation comments
7934 * More compact closure syntax
7935 * 'do' expressions for treating higher-order functions as
7937 * *-patterns (wildcard extended to all constructor fields)
7940 * Name resolution pass and exhaustiveness checker rewritten
7941 * Region pointers and borrow checking supersede alias
7943 * Init-ness checking is now provided by a region-based liveness
7944 pass instead of the typestate pass; same for last-use analysis
7945 * Extensive work on region pointers
7947 * Experimental new language features
7948 * Slices and fixed-size, interior-allocated vectors
7949 * #!-comments for lang versioning, shell execution
7950 * Destructors and iface implementation for classes;
7951 type-parameterized classes and class methods
7952 * 'const' type kind for types that can be used to implement
7953 shared-memory concurrency patterns
7957 * Removal of various obsolete features
7958 * Keywords: 'be', 'prove', 'syntax', 'note', 'mutable', 'bind',
7959 'crust', 'native' (now 'extern'), 'cont' (now 'again')
7961 * Constructs: do-while loops ('do' repurposed), fn binding,
7962 resources (replaced by destructors)
7964 * Compiler reorganization
7965 * Syntax-layer of compiler split into separate crate
7966 * Clang (from LLVM project) integrated into build
7967 * Typechecker split into sub-modules
7970 * New time functions
7971 * Extension methods for many built-in types
7972 * Arc: atomic-refcount read-only / exclusive-use shared cells
7973 * Par: parallel map and search routines
7974 * Extensive work on libuv interface
7975 * Much vector code moved to libraries
7976 * Syntax extensions: #line, #col, #file, #mod, #stringify,
7977 #include, #include_str, #include_bin
7980 * Cargo automatically resolves dependencies
7983 Version 0.2 (2012-03-29)
7984 =========================
7986 * >1500 changes, numerous bugfixes
7988 * New docs and doc tooling
7990 * New port: FreeBSD x86_64
7992 * Compilation model enhancements
7993 * Generics now specialized, multiply instantiated
7994 * Functions now inlined across separate crates
7996 * Scheduling, stack and threading fixes
7997 * Noticeably improved message-passing performance
7998 * Explicit schedulers
8002 * Experimental new language features
8003 * Operator overloading
8007 * Various language extensions
8008 * C-callback function types: 'crust fn ...'
8009 * Infinite-loop construct: 'loop { ... }'
8010 * Shorten 'mutable' to 'mut'
8011 * Required mutable-local qualifier: 'let mut ...'
8012 * Basic glob-exporting: 'export foo::*;'
8013 * Alt now exhaustive, 'alt check' for runtime-checked
8014 * Block-function form of 'for' loop, with 'break' and 'ret'.
8017 * AST quasi-quote syntax extension
8018 * Revived libuv interface
8019 * New modules: core::{future, iter}, std::arena
8020 * Merged per-platform std::{os*, fs*} to core::{libc, os}
8021 * Extensive cleanup, regularization in libstd, libcore
8024 Version 0.1 (2012-01-20)
8025 ===============================
8027 * Most language features work, including:
8028 * Unique pointers, unique closures, move semantics
8029 * Interface-constrained generics
8030 * Static interface dispatch
8032 * Multithread task scheduling
8033 * Typestate predicates
8034 * Failure unwinding, destructors
8035 * Pattern matching and destructuring assignment
8036 * Lightweight block-lambda syntax
8037 * Preliminary macro-by-example
8039 * Compiler works with the following configurations:
8040 * Linux: x86 and x86_64 hosts and targets
8041 * macOS: x86 and x86_64 hosts and targets
8042 * Windows: x86 hosts and targets
8044 * Cross compilation / multi-target configuration supported.
8046 * Preliminary API-documentation and package-management tools included.
8050 * Documentation is incomplete.
8052 * Performance is below intended target.
8054 * Standard library APIs are subject to extensive change, reorganization.
8056 * Language-level versioning is not yet operational - future code will