1 Version 1.29.0 (2018-09-13)
2 ==========================
6 - [Bumped minimum LLVM version to 5.0.][51899]
7 - [Added `powerpc64le-unknown-linux-musl` target.][51619]
8 - [Added `aarch64-unknown-hermit` and `x86_64-unknown-hermit` targets.][52861]
12 - [`Once::call_once` now no longer requires `Once` to be `'static`.][52239]
13 - [`BuildHasherDefault` now implements `PartialEq` and `Eq`.][52402]
14 - [`Box<CStr>`, `Box<OsStr>`, and `Box<Path>` now implement `Clone`.][51912]
15 - [Implemented `PartialEq<&str>` for `OsString` and `PartialEq<OsString>`
17 - [`Cell<T>` now allows `T` to be unsized.][50494]
18 - [`SocketAddr` is now stable on Redox.][52656]
23 - [`Iterator::flatten`]
28 - [Cargo can silently fix some bad lockfiles ][cargo/5831] You can use
29 `--locked` to disable this behaviour.
30 - [`cargo-install` will now allow you to cross compile an install
31 using `--target`][cargo/5614]
32 - [Added the `cargo-fix` subcommand to automatically move project code from
33 2015 edition to 2018.][cargo/5723]
37 - [`rustdoc` now has the `--cap-lints` option which demotes all lints above
38 the specified level to that level.][52354] For example `--cap-lints warn`
39 will demote `deny` and `forbid` lints to `warn`.
40 - [`rustc` and `rustdoc` will now have the exit code of `1` if compilation
41 fails, and `101` if there is a panic.][52197]
45 - [`str::{slice_unchecked, slice_unchecked_mut}` are now deprecated.][51807]
46 Use `str::get_unchecked(begin..end)` instead.
47 - [`std::env::home_dir` is now deprecated for its unintuitive behaviour.][51656]
48 Consider using the `home_dir` function from
49 https://crates.io/crates/dirs instead.
50 - [`rustc` will no longer silently ignore invalid data in target spec.][52330]
52 [52861]: https://github.com/rust-lang/rust/pull/52861/
53 [52656]: https://github.com/rust-lang/rust/pull/52656/
54 [52239]: https://github.com/rust-lang/rust/pull/52239/
55 [52330]: https://github.com/rust-lang/rust/pull/52330/
56 [52354]: https://github.com/rust-lang/rust/pull/52354/
57 [52402]: https://github.com/rust-lang/rust/pull/52402/
58 [52103]: https://github.com/rust-lang/rust/pull/52103/
59 [52197]: https://github.com/rust-lang/rust/pull/52197/
60 [51807]: https://github.com/rust-lang/rust/pull/51807/
61 [51899]: https://github.com/rust-lang/rust/pull/51899/
62 [51912]: https://github.com/rust-lang/rust/pull/51912/
63 [51511]: https://github.com/rust-lang/rust/pull/51511/
64 [51619]: https://github.com/rust-lang/rust/pull/51619/
65 [51656]: https://github.com/rust-lang/rust/pull/51656/
66 [51178]: https://github.com/rust-lang/rust/pull/51178/
67 [50494]: https://github.com/rust-lang/rust/pull/50494/
68 [cargo/5614]: https://github.com/rust-lang/cargo/pull/5614/
69 [cargo/5723]: https://github.com/rust-lang/cargo/pull/5723/
70 [cargo/5831]: https://github.com/rust-lang/cargo/pull/5831/
71 [`Arc::downcast`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.downcast
72 [`Iterator::flatten`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.flatten
73 [`Rc::downcast`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.downcast
76 Version 1.28.0 (2018-08-02)
77 ===========================
81 - [The `#[repr(transparent)]` attribute is now stable.][51562] This attribute
82 allows a Rust newtype wrapper (`struct NewType<T>(T);`) to be represented as
83 the inner type across Foreign Function Interface (FFI) boundaries.
84 - [The keywords `pure`, `sizeof`, `alignof`, and `offsetof` have been unreserved
85 and can now be used as identifiers.][51196]
86 - [The `GlobalAlloc` trait and `#[global_allocator]` attribute are now
87 stable.][51241] This will allow users to specify a global allocator for
89 - [Unit test functions marked with the `#[test]` attribute can now return
90 `Result<(), E: Debug>` in addition to `()`.][51298]
91 - [The `lifetime` specifier for `macro_rules!` is now stable.][50385] This
92 allows macros to easily target lifetimes.
96 - [The `s` and `z` optimisation levels are now stable.][50265] These optimisations
97 prioritise making smaller binary sizes. `z` is the same as `s` with the
98 exception that it does not vectorise loops, which typically results in an even
100 - [The short error format is now stable.][49546] Specified with
101 `--error-format=short` this option will provide a more compressed output of
103 - [Added a lint warning when you have duplicated `macro_export`s.][50143]
104 - [Reduced the number of allocations in the macro parser.][50855] This can
105 improve compile times of macro heavy crates on average by 5%.
109 - [Implemented `Default` for `&mut str`.][51306]
110 - [Implemented `From<bool>` for all integer and unsigned number types.][50554]
111 - [Implemented `Extend` for `()`.][50234]
112 - [The `Debug` implementation of `time::Duration` should now be more easily
113 human readable.][50364] Previously a `Duration` of one second would printed as
114 `Duration { secs: 1, nanos: 0 }` and will now be printed as `1s`.
115 - [Implemented `From<&String>` for `Cow<str>`, `From<&Vec<T>>` for `Cow<[T]>`,
116 `From<Cow<CStr>>` for `CString`, `From<CString>, From<CStr>, From<&CString>`
117 for `Cow<CStr>`, `From<OsString>, From<OsStr>, From<&OsString>` for
118 `Cow<OsStr>`, `From<&PathBuf>` for `Cow<Path>`, and `From<Cow<Path>>`
119 for `PathBuf`.][50170]
120 - [Implemented `Shl` and `Shr` for `Wrapping<u128>`
121 and `Wrapping<i128>`.][50465]
122 - [`DirEntry::metadata` now uses `fstatat` instead of `lstat` when
123 possible.][51050] This can provide up to a 40% speed increase.
124 - [Improved error messages when using `format!`.][50610]
128 - [`Iterator::step_by`]
129 - [`Path::ancestors`]
130 - [`SystemTime::UNIX_EPOCH`]
131 - [`alloc::GlobalAlloc`]
133 - [`alloc::LayoutErr`]
136 - [`alloc::alloc_zeroed`]
139 - [`alloc::handle_alloc_error`]
140 - [`btree_map::Entry::or_default`]
142 - [`hash_map::Entry::or_default`]
143 - [`iter::repeat_with`]
144 - [`num::NonZeroUsize`]
145 - [`num::NonZeroU128`]
146 - [`num::NonZeroU16`]
147 - [`num::NonZeroU32`]
148 - [`num::NonZeroU64`]
150 - [`ops::RangeBounds`]
151 - [`slice::SliceIndex`]
152 - [`slice::from_mut`]
153 - [`slice::from_ref`]
154 - [`{Any + Send + Sync}::downcast_mut`]
155 - [`{Any + Send + Sync}::downcast_ref`]
156 - [`{Any + Send + Sync}::is`]
160 - [Cargo will now no longer allow you to publish crates with build scripts that
161 modify the `src` directory.][cargo/5584] The `src` directory in a crate should be
162 considered to be immutable.
166 - [The `suggestion_applicability` field in `rustc`'s json output is now
167 stable.][50486] This will allow dev tools to check whether a code suggestion
172 - [Rust will consider trait objects with duplicated constraints to be the same
173 type as without the duplicated constraint.][51276] For example the below code will
179 fn test(&self) { println!("one"); } //~ ERROR duplicate definitions with name `test`
182 impl Trait + Send + Send {
183 fn test(&self) { println!("two"); }
187 [49546]: https://github.com/rust-lang/rust/pull/49546/
188 [50143]: https://github.com/rust-lang/rust/pull/50143/
189 [50170]: https://github.com/rust-lang/rust/pull/50170/
190 [50234]: https://github.com/rust-lang/rust/pull/50234/
191 [50265]: https://github.com/rust-lang/rust/pull/50265/
192 [50364]: https://github.com/rust-lang/rust/pull/50364/
193 [50385]: https://github.com/rust-lang/rust/pull/50385/
194 [50465]: https://github.com/rust-lang/rust/pull/50465/
195 [50486]: https://github.com/rust-lang/rust/pull/50486/
196 [50554]: https://github.com/rust-lang/rust/pull/50554/
197 [50610]: https://github.com/rust-lang/rust/pull/50610/
198 [50855]: https://github.com/rust-lang/rust/pull/50855/
199 [51050]: https://github.com/rust-lang/rust/pull/51050/
200 [51196]: https://github.com/rust-lang/rust/pull/51196/
201 [51200]: https://github.com/rust-lang/rust/pull/51200/
202 [51241]: https://github.com/rust-lang/rust/pull/51241/
203 [51276]: https://github.com/rust-lang/rust/pull/51276/
204 [51298]: https://github.com/rust-lang/rust/pull/51298/
205 [51306]: https://github.com/rust-lang/rust/pull/51306/
206 [51562]: https://github.com/rust-lang/rust/pull/51562/
207 [cargo/5584]: https://github.com/rust-lang/cargo/pull/5584/
208 [`Iterator::step_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.step_by
209 [`Path::ancestors`]: https://doc.rust-lang.org/std/path/struct.Path.html#method.ancestors
210 [`SystemTime::UNIX_EPOCH`]: https://doc.rust-lang.org/std/time/struct.SystemTime.html#associatedconstant.UNIX_EPOCH
211 [`alloc::GlobalAlloc`]: https://doc.rust-lang.org/std/alloc/trait.GlobalAlloc.html
212 [`alloc::Layout`]: https://doc.rust-lang.org/std/alloc/struct.Layout.html
213 [`alloc::LayoutErr`]: https://doc.rust-lang.org/std/alloc/struct.LayoutErr.html
214 [`alloc::System`]: https://doc.rust-lang.org/std/alloc/struct.System.html
215 [`alloc::alloc`]: https://doc.rust-lang.org/std/alloc/fn.alloc.html
216 [`alloc::alloc_zeroed`]: https://doc.rust-lang.org/std/alloc/fn.alloc_zeroed.html
217 [`alloc::dealloc`]: https://doc.rust-lang.org/std/alloc/fn.dealloc.html
218 [`alloc::realloc`]: https://doc.rust-lang.org/std/alloc/fn.realloc.html
219 [`alloc::handle_alloc_error`]: https://doc.rust-lang.org/std/alloc/fn.handle_alloc_error.html
220 [`btree_map::Entry::or_default`]: https://doc.rust-lang.org/std/collections/btree_map/enum.Entry.html#method.or_default
221 [`fmt::Alignment`]: https://doc.rust-lang.org/std/fmt/enum.Alignment.html
222 [`hash_map::Entry::or_default`]: https://doc.rust-lang.org/std/collections/hash_map/enum.Entry.html#method.or_default
223 [`iter::repeat_with`]: https://doc.rust-lang.org/std/iter/fn.repeat_with.html
224 [`num::NonZeroUsize`]: https://doc.rust-lang.org/std/num/struct.NonZeroUsize.html
225 [`num::NonZeroU128`]: https://doc.rust-lang.org/std/num/struct.NonZeroU128.html
226 [`num::NonZeroU16`]: https://doc.rust-lang.org/std/num/struct.NonZeroU16.html
227 [`num::NonZeroU32`]: https://doc.rust-lang.org/std/num/struct.NonZeroU32.html
228 [`num::NonZeroU64`]: https://doc.rust-lang.org/std/num/struct.NonZeroU64.html
229 [`num::NonZeroU8`]: https://doc.rust-lang.org/std/num/struct.NonZeroU8.html
230 [`ops::RangeBounds`]: https://doc.rust-lang.org/std/ops/trait.RangeBounds.html
231 [`slice::SliceIndex`]: https://doc.rust-lang.org/std/slice/trait.SliceIndex.html
232 [`slice::from_mut`]: https://doc.rust-lang.org/std/slice/fn.from_mut.html
233 [`slice::from_ref`]: https://doc.rust-lang.org/std/slice/fn.from_ref.html
234 [`{Any + Send + Sync}::downcast_mut`]: https://doc.rust-lang.org/std/any/trait.Any.html#method.downcast_mut-2
235 [`{Any + Send + Sync}::downcast_ref`]: https://doc.rust-lang.org/std/any/trait.Any.html#method.downcast_ref-2
236 [`{Any + Send + Sync}::is`]: https://doc.rust-lang.org/std/any/trait.Any.html#method.is-2
238 Version 1.27.2 (2018-07-20)
239 ===========================
244 - The borrow checker was fixed to avoid potential unsoundness when using
245 match ergonomics: [#52213][52213].
247 [52213]: https://github.com/rust-lang/rust/issues/52213
249 Version 1.27.1 (2018-07-10)
250 ===========================
255 - rustdoc would execute plugins in the /tmp/rustdoc/plugins directory
256 when running, which enabled executing code as some other user on a
257 given machine. This release fixes that vulnerability; you can read
258 more about this on the [blog][rustdoc-sec]. The associated CVE is [CVE-2018-1000622].
260 Thank you to Red Hat for responsibily disclosing this vulnerability to us.
265 - The borrow checker was fixed to avoid an additional potential unsoundness when using
266 match ergonomics: [#51415][51415], [#49534][49534].
268 [51415]: https://github.com/rust-lang/rust/issues/51415
269 [49534]: https://github.com/rust-lang/rust/issues/49534
270 [rustdoc-sec]: https://blog.rust-lang.org/2018/07/06/security-advisory-for-rustdoc.html
271 [CVE-2018-1000622]: https://cve.mitre.org/cgi-bin/cvename.cgi?name=%20CVE-2018-1000622
273 Version 1.27.0 (2018-06-21)
274 ==========================
278 - [Removed 'proc' from the reserved keywords list.][49699] This allows `proc` to
279 be used as an identifier.
280 - [The dyn syntax is now available.][49968] This syntax is equivalent to the
281 bare `Trait` syntax, and should make it clearer when being used in tandem with
282 `impl Trait`. Since it is equivalent to the following syntax:
283 `&Trait == &dyn Trait`, `&mut Trait == &mut dyn Trait`, and
284 `Box<Trait> == Box<dyn Trait>`.
285 - [Attributes on generic parameters such as types and lifetimes are
286 now stable.][48851] e.g.
287 `fn foo<#[lifetime_attr] 'a, #[type_attr] T: 'a>() {}`
288 - [The `#[must_use]` attribute can now also be used on functions as well as
289 types.][48925] It provides a lint that by default warns users when the
290 value returned by a function has not been used.
294 - [Added the `armv5te-unknown-linux-musleabi` target.][50423]
298 - [SIMD (Single Instruction Multiple Data) on x86/x86_64 is now stable.][49664]
299 This includes [`arch::x86`] & [`arch::x86_64`] modules which contain
300 SIMD intrinsics, a new macro called `is_x86_feature_detected!`, the
301 `#[target_feature(enable="")]` attribute, and adding `target_feature = ""` to
303 - [A lot of methods for `[u8]`, `f32`, and `f64` previously only available in
304 std are now available in core.][49896]
305 - [The generic `Rhs` type parameter on `ops::{Shl, ShlAssign, Shr}` now defaults
307 - [`std::str::replace` now has the `#[must_use]` attribute][50177] to clarify
308 that the operation isn't done in place.
309 - [`Clone::clone`, `Iterator::collect`, and `ToOwned::to_owned` now have
310 the `#[must_use]` attribute][49533] to warn about unused potentially
311 expensive allocations.
315 - [`DoubleEndedIterator::rfind`]
316 - [`DoubleEndedIterator::rfold`]
317 - [`DoubleEndedIterator::try_rfold`]
318 - [`Duration::from_micros`]
319 - [`Duration::from_nanos`]
320 - [`Duration::subsec_micros`]
321 - [`Duration::subsec_millis`]
322 - [`HashMap::remove_entry`]
323 - [`Iterator::try_fold`]
324 - [`Iterator::try_for_each`]
327 - [`String::replace_range`]
328 - [`Take::set_limit`]
329 - [`hint::unreachable_unchecked`]
330 - [`os::unix::process::parent_id`]
331 - [`ptr::swap_nonoverlapping`]
332 - [`slice::rsplit_mut`]
334 - [`slice::swap_with_slice`]
338 - [`cargo-metadata` now includes `authors`, `categories`, `keywords`,
339 `readme`, and `repository` fields.][cargo/5386]
340 - [`cargo-metadata` now includes a package's `metadata` table.][cargo/5360]
341 - [Added the `--target-dir` optional argument.][cargo/5393] This allows you to specify
342 a different directory than `target` for placing compilation artifacts.
343 - [Cargo will be adding automatic target inference for binaries, benchmarks,
344 examples, and tests in the Rust 2018 edition.][cargo/5335] If your project specifies
345 specific targets e.g. using `[[bin]]` and have other binaries in locations
346 where cargo would infer a binary, Cargo will produce a warning. You can
347 disable this feature ahead of time by setting any of the following `autobins`,
348 `autobenches`, `autoexamples`, `autotests` to false.
349 - [Cargo will now cache compiler information.][cargo/5359] This can be disabled by
350 setting `CARGO_CACHE_RUSTC_INFO=0` in your environment.
354 - [Added “The Rustc book” into the official documentation.][49707]
355 [“The Rustc book”] documents and teaches how to use the rustc compiler.
356 - [All books available on `doc.rust-lang.org` are now searchable.][49623]
360 - [Calling a `CharExt` or `StrExt` method directly on core will no longer
361 work.][49896] e.g. `::core::prelude::v1::StrExt::is_empty("")` will not
362 compile, `"".is_empty()` will still compile.
363 - [`Debug` output on `atomic::{AtomicBool, AtomicIsize, AtomicPtr, AtomicUsize}`
364 will only print the inner type.][48553] e.g.
365 `print!("{:?}", AtomicBool::new(true))` will print `true`
366 not `AtomicBool(true)`.
367 - [The maximum number for `repr(align(N))` is now 2²⁹.][50378] Previously you
368 could enter higher numbers but they were not supported by LLVM. Up to 512MB
369 alignment should cover all use cases.
371 [48553]: https://github.com/rust-lang/rust/pull/48553/
372 [48851]: https://github.com/rust-lang/rust/pull/48851/
373 [48925]: https://github.com/rust-lang/rust/pull/48925/
374 [49533]: https://github.com/rust-lang/rust/pull/49533/
375 [49623]: https://github.com/rust-lang/rust/pull/49623/
376 [49630]: https://github.com/rust-lang/rust/pull/49630/
377 [49664]: https://github.com/rust-lang/rust/pull/49664/
378 [49699]: https://github.com/rust-lang/rust/pull/49699/
379 [49707]: https://github.com/rust-lang/rust/pull/49707/
380 [49719]: https://github.com/rust-lang/rust/pull/49719/
381 [49896]: https://github.com/rust-lang/rust/pull/49896/
382 [49968]: https://github.com/rust-lang/rust/pull/49968/
383 [50177]: https://github.com/rust-lang/rust/pull/50177/
384 [50378]: https://github.com/rust-lang/rust/pull/50378/
385 [50398]: https://github.com/rust-lang/rust/pull/50398/
386 [50423]: https://github.com/rust-lang/rust/pull/50423/
387 [cargo/5203]: https://github.com/rust-lang/cargo/pull/5203/
388 [cargo/5335]: https://github.com/rust-lang/cargo/pull/5335/
389 [cargo/5359]: https://github.com/rust-lang/cargo/pull/5359/
390 [cargo/5360]: https://github.com/rust-lang/cargo/pull/5360/
391 [cargo/5386]: https://github.com/rust-lang/cargo/pull/5386/
392 [cargo/5393]: https://github.com/rust-lang/cargo/pull/5393/
393 [`DoubleEndedIterator::rfind`]: https://doc.rust-lang.org/std/iter/trait.DoubleEndedIterator.html#method.rfind
394 [`DoubleEndedIterator::rfold`]: https://doc.rust-lang.org/std/iter/trait.DoubleEndedIterator.html#method.rfold
395 [`DoubleEndedIterator::try_rfold`]: https://doc.rust-lang.org/std/iter/trait.DoubleEndedIterator.html#method.try_rfold
396 [`Duration::from_micros`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.from_micros
397 [`Duration::from_nanos`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.from_nanos
398 [`Duration::subsec_micros`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.subsec_micros
399 [`Duration::subsec_millis`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.subsec_millis
400 [`HashMap::remove_entry`]: https://doc.rust-lang.org/std/collections/struct.HashMap.html#method.remove_entry
401 [`Iterator::try_fold`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.try_fold
402 [`Iterator::try_for_each`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.try_for_each
403 [`NonNull::cast`]: https://doc.rust-lang.org/std/ptr/struct.NonNull.html#method.cast
404 [`Option::filter`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.filter
405 [`String::replace_range`]: https://doc.rust-lang.org/std/string/struct.String.html#method.replace_range
406 [`Take::set_limit`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.set_limit
407 [`hint::unreachable_unchecked`]: https://doc.rust-lang.org/std/hint/fn.unreachable_unchecked.html
408 [`os::unix::process::parent_id`]: https://doc.rust-lang.org/std/os/unix/process/fn.parent_id.html
409 [`process::id`]: https://doc.rust-lang.org/std/process/fn.id.html
410 [`ptr::swap_nonoverlapping`]: https://doc.rust-lang.org/std/ptr/fn.swap_nonoverlapping.html
411 [`slice::rsplit_mut`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rsplit_mut
412 [`slice::rsplit`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rsplit
413 [`slice::swap_with_slice`]: https://doc.rust-lang.org/std/primitive.slice.html#method.swap_with_slice
414 [`arch::x86_64`]: https://doc.rust-lang.org/std/arch/x86_64/index.html
415 [`arch::x86`]: https://doc.rust-lang.org/std/arch/x86/index.html
416 [“The Rustc book”]: https://doc.rust-lang.org/rustc
419 Version 1.26.2 (2018-06-05)
420 ==========================
425 - [The borrow checker was fixed to avoid unsoundness when using match ergonomics][51117]
427 [51117]: https://github.com/rust-lang/rust/issues/51117
430 Version 1.26.1 (2018-05-29)
431 ==========================
436 - [RLS now works on Windows][50646]
437 - [Rustfmt stopped badly formatting text in some cases][rustfmt/2695]
443 - [`fn main() -> impl Trait` no longer works for non-Termination
445 This reverts an accidental stabilization.
446 - [`NaN > NaN` no longer returns true in const-fn contexts][50812]
447 - [Prohibit using turbofish for `impl Trait` in method arguments][50950]
449 [50646]: https://github.com/rust-lang/rust/issues/50646
450 [50656]: https://github.com/rust-lang/rust/pull/50656
451 [50812]: https://github.com/rust-lang/rust/pull/50812
452 [50950]: https://github.com/rust-lang/rust/issues/50950
453 [rustfmt/2695]: https://github.com/rust-lang-nursery/rustfmt/issues/2695
455 Version 1.26.0 (2018-05-10)
456 ==========================
460 - [Closures now implement `Copy` and/or `Clone` if all captured variables
461 implement either or both traits.][49299]
462 - [The inclusive range syntax e.g. `for x in 0..=10` is now stable.][47813]
463 - [The `'_` lifetime is now stable. The underscore lifetime can be used anywhere where a
464 lifetime can be elided.][49458]
465 - [`impl Trait` is now stable allowing you to have abstract types in returns
466 or in function parameters.][49255] e.g. `fn foo() -> impl Iterator<Item=u8>` or
467 `fn open(path: impl AsRef<Path>)`.
468 - [Pattern matching will now automatically apply dereferences.][49394]
469 - [128-bit integers in the form of `u128` and `i128` are now stable.][49101]
470 - [`main` can now return `Result<(), E: Debug>`][49162] in addition to `()`.
471 - [A lot of operations are now available in a const context.][46882] E.g. You
472 can now index into constant arrays, reference and dereference into constants,
473 and use Tuple struct constructors.
474 - [Fixed entry slice patterns are now stable.][48516] e.g.
476 let points = [1, 2, 3, 4];
478 [1, 2, 3, 4] => println!("All points were sequential."),
479 _ => println!("Not all points were sequential."),
486 - [LLD is now used as the default linker for `wasm32-unknown-unknown`.][48125]
487 - [Fixed exponential projection complexity on nested types.][48296]
488 This can provide up to a ~12% reduction in compile times for certain crates.
489 - [Added the `--remap-path-prefix` option to rustc.][48359] Allowing you
490 to remap path prefixes outputted by the compiler.
491 - [Added `powerpc-unknown-netbsd` target.][48281]
495 - [Implemented `From<u16> for usize` & `From<{u8, i16}> for isize`.][49305]
496 - [Added hexadecimal formatting for integers with fmt::Debug][48978]
497 e.g. `assert!(format!("{:02x?}", b"Foo\0") == "[46, 6f, 6f, 00]")`
498 - [Implemented `Default, Hash` for `cmp::Reverse`.][48628]
499 - [Optimized `str::repeat` being 8x faster in large cases.][48657]
500 - [`ascii::escape_default` is now available in libcore.][48735]
501 - [Trailing commas are now supported in std and core macros.][48056]
502 - [Implemented `Copy, Clone` for `cmp::Reverse`][47379]
503 - [Implemented `Clone` for `char::{ToLowercase, ToUppercase}`.][48629]
508 - [`*const T::copy_to_nonoverlapping`]
509 - [`*const T::copy_to`]
510 - [`*const T::read_unaligned`]
511 - [`*const T::read_volatile`]
514 - [`*const T::wrapping_add`]
515 - [`*const T::wrapping_sub`]
517 - [`*mut T::copy_to_nonoverlapping`]
518 - [`*mut T::copy_to`]
519 - [`*mut T::read_unaligned`]
520 - [`*mut T::read_volatile`]
522 - [`*mut T::replace`]
525 - [`*mut T::wrapping_add`]
526 - [`*mut T::wrapping_sub`]
527 - [`*mut T::write_bytes`]
528 - [`*mut T::write_unaligned`]
529 - [`*mut T::write_volatile`]
532 - [`FromUtf8Error::as_bytes`]
533 - [`LocalKey::try_with`]
535 - [`btree_map::Entry::and_modify`]
536 - [`fs::read_to_string`]
539 - [`hash_map::Entry::and_modify`]
540 - [`iter::FusedIterator`]
541 - [`ops::RangeInclusive`]
542 - [`ops::RangeToInclusive`]
544 - [`slice::rotate_left`]
545 - [`slice::rotate_right`]
551 - [Cargo will now output path to custom commands when `-v` is
552 passed with `--list`][cargo/5041]
553 - [The Cargo binary version is now the same as the Rust version][cargo/5083]
557 - [The second edition of "The Rust Programming Language" book is now recommended
558 over the first.][48404]
563 - [aliasing a `Fn` trait as `dyn` no longer works.][48481] E.g. the following
564 syntax is now invalid.
566 use std::ops::Fn as dyn;
567 fn g(_: Box<dyn(std::fmt::Debug)>) {}
569 - [The result of dereferences are no longer promoted to `'static`.][47408]
573 const PAIR: &(i32, i32) = &(0, 1);
574 let _reversed_pair: &'static _ = &(PAIR.1, PAIR.0); // Doesn't work
577 - [Deprecate `AsciiExt` trait in favor of inherent methods.][49109]
578 - [`".e0"` will now no longer parse as `0.0` and will instead cause
580 - [Removed hoedown from rustdoc.][48274]
581 - [Bounds on higher-kinded lifetimes a hard error.][48326]
583 [46882]: https://github.com/rust-lang/rust/pull/46882
584 [47379]: https://github.com/rust-lang/rust/pull/47379
585 [47408]: https://github.com/rust-lang/rust/pull/47408
586 [47813]: https://github.com/rust-lang/rust/pull/47813
587 [48056]: https://github.com/rust-lang/rust/pull/48056
588 [48125]: https://github.com/rust-lang/rust/pull/48125
589 [48166]: https://github.com/rust-lang/rust/pull/48166
590 [48235]: https://github.com/rust-lang/rust/pull/48235
591 [48274]: https://github.com/rust-lang/rust/pull/48274
592 [48281]: https://github.com/rust-lang/rust/pull/48281
593 [48296]: https://github.com/rust-lang/rust/pull/48296
594 [48326]: https://github.com/rust-lang/rust/pull/48326
595 [48359]: https://github.com/rust-lang/rust/pull/48359
596 [48404]: https://github.com/rust-lang/rust/pull/48404
597 [48481]: https://github.com/rust-lang/rust/pull/48481
598 [48516]: https://github.com/rust-lang/rust/pull/48516
599 [48628]: https://github.com/rust-lang/rust/pull/48628
600 [48629]: https://github.com/rust-lang/rust/pull/48629
601 [48657]: https://github.com/rust-lang/rust/pull/48657
602 [48735]: https://github.com/rust-lang/rust/pull/48735
603 [48978]: https://github.com/rust-lang/rust/pull/48978
604 [49101]: https://github.com/rust-lang/rust/pull/49101
605 [49109]: https://github.com/rust-lang/rust/pull/49109
606 [49121]: https://github.com/rust-lang/rust/pull/49121
607 [49162]: https://github.com/rust-lang/rust/pull/49162
608 [49184]: https://github.com/rust-lang/rust/pull/49184
609 [49234]: https://github.com/rust-lang/rust/pull/49234
610 [49255]: https://github.com/rust-lang/rust/pull/49255
611 [49299]: https://github.com/rust-lang/rust/pull/49299
612 [49305]: https://github.com/rust-lang/rust/pull/49305
613 [49394]: https://github.com/rust-lang/rust/pull/49394
614 [49458]: https://github.com/rust-lang/rust/pull/49458
615 [`*const T::add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.add
616 [`*const T::copy_to_nonoverlapping`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to_nonoverlapping
617 [`*const T::copy_to`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to
618 [`*const T::read_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_unaligned
619 [`*const T::read_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_volatile
620 [`*const T::read`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read
621 [`*const T::sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.sub
622 [`*const T::wrapping_add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_add
623 [`*const T::wrapping_sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_sub
624 [`*mut T::add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.add-1
625 [`*mut T::copy_to_nonoverlapping`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to_nonoverlapping-1
626 [`*mut T::copy_to`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to-1
627 [`*mut T::read_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_unaligned-1
628 [`*mut T::read_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_volatile-1
629 [`*mut T::read`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read-1
630 [`*mut T::replace`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.replace
631 [`*mut T::sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.sub-1
632 [`*mut T::swap`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.swap
633 [`*mut T::wrapping_add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_add-1
634 [`*mut T::wrapping_sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_sub-1
635 [`*mut T::write_bytes`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_bytes
636 [`*mut T::write_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_unaligned
637 [`*mut T::write_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_volatile
638 [`*mut T::write`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write
639 [`Box::leak`]: https://doc.rust-lang.org/std/boxed/struct.Box.html#method.leak
640 [`FromUtf8Error::as_bytes`]: https://doc.rust-lang.org/std/string/struct.FromUtf8Error.html#method.as_bytes
641 [`LocalKey::try_with`]: https://doc.rust-lang.org/std/thread/struct.LocalKey.html#method.try_with
642 [`Option::cloned`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.cloned
643 [`btree_map::Entry::and_modify`]: https://doc.rust-lang.org/std/collections/btree_map/enum.Entry.html#method.and_modify
644 [`fs::read_to_string`]: https://doc.rust-lang.org/std/fs/fn.read_to_string.html
645 [`fs::read`]: https://doc.rust-lang.org/std/fs/fn.read.html
646 [`fs::write`]: https://doc.rust-lang.org/std/fs/fn.write.html
647 [`hash_map::Entry::and_modify`]: https://doc.rust-lang.org/std/collections/hash_map/enum.Entry.html#method.and_modify
648 [`iter::FusedIterator`]: https://doc.rust-lang.org/std/iter/trait.FusedIterator.html
649 [`ops::RangeInclusive`]: https://doc.rust-lang.org/std/ops/struct.RangeInclusive.html
650 [`ops::RangeToInclusive`]: https://doc.rust-lang.org/std/ops/struct.RangeToInclusive.html
651 [`process::id`]: https://doc.rust-lang.org/std/process/fn.id.html
652 [`slice::rotate_left`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rotate_left
653 [`slice::rotate_right`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rotate_right
654 [`String::retain`]: https://doc.rust-lang.org/std/string/struct.String.html#method.retain
655 [cargo/5041]: https://github.com/rust-lang/cargo/pull/5041
656 [cargo/5083]: https://github.com/rust-lang/cargo/pull/5083
659 Version 1.25.0 (2018-03-29)
660 ==========================
664 - [The `#[repr(align(x))]` attribute is now stable.][47006] [RFC 1358]
665 - [You can now use nested groups of imports.][47948]
666 e.g. `use std::{fs::File, io::Read, path::{Path, PathBuf}};`
667 - [You can now have `|` at the start of a match arm.][47947] e.g.
675 | Foo::B => println!("AB"),
676 | Foo::C => println!("C"),
683 - [Upgraded to LLVM 6.][47828]
684 - [Added `-C lto=val` option.][47521]
685 - [Added `i586-unknown-linux-musl` target][47282]
689 - [Impl Send for `process::Command` on Unix.][47760]
690 - [Impl PartialEq and Eq for `ParseCharError`.][47790]
691 - [`UnsafeCell::into_inner` is now safe.][47204]
692 - [Implement libstd for CloudABI.][47268]
693 - [`Float::{from_bits, to_bits}` is now available in libcore.][46931]
694 - [Implement `AsRef<Path>` for Component][46985]
695 - [Implemented `Write` for `Cursor<&mut Vec<u8>>`][46830]
696 - [Moved `Duration` to libcore.][46666]
700 - [`Location::column`]
703 The following functions can now be used in a constant expression.
704 eg. `static MINUTE: Duration = Duration::from_secs(60);`
705 - [`Duration::new`][47300]
706 - [`Duration::from_secs`][47300]
707 - [`Duration::from_millis`][47300]
711 - [`cargo new` no longer removes `rust` or `rs` prefixs/suffixs.][cargo/5013]
712 - [`cargo new` now defaults to creating a binary crate, instead of a
713 library crate.][cargo/5029]
717 - [Rust by example is now shipped with new releases][46196]
721 - [Deprecated `net::lookup_host`.][47510]
722 - [`rustdoc` has switched to pulldown as the default markdown renderer.][47398]
723 - The borrow checker was sometimes incorrectly permitting overlapping borrows
724 around indexing operations (see [#47349][47349]). This has been fixed (which also
725 enabled some correct code that used to cause errors (e.g. [#33903][33903] and [#46095][46095]).
726 - [Removed deprecated unstable attribute `#[simd]`.][47251]
728 [33903]: https://github.com/rust-lang/rust/pull/33903
729 [47947]: https://github.com/rust-lang/rust/pull/47947
730 [47948]: https://github.com/rust-lang/rust/pull/47948
731 [47760]: https://github.com/rust-lang/rust/pull/47760
732 [47790]: https://github.com/rust-lang/rust/pull/47790
733 [47828]: https://github.com/rust-lang/rust/pull/47828
734 [47398]: https://github.com/rust-lang/rust/pull/47398
735 [47510]: https://github.com/rust-lang/rust/pull/47510
736 [47521]: https://github.com/rust-lang/rust/pull/47521
737 [47204]: https://github.com/rust-lang/rust/pull/47204
738 [47251]: https://github.com/rust-lang/rust/pull/47251
739 [47268]: https://github.com/rust-lang/rust/pull/47268
740 [47282]: https://github.com/rust-lang/rust/pull/47282
741 [47300]: https://github.com/rust-lang/rust/pull/47300
742 [47349]: https://github.com/rust-lang/rust/pull/47349
743 [46931]: https://github.com/rust-lang/rust/pull/46931
744 [46985]: https://github.com/rust-lang/rust/pull/46985
745 [47006]: https://github.com/rust-lang/rust/pull/47006
746 [46830]: https://github.com/rust-lang/rust/pull/46830
747 [46095]: https://github.com/rust-lang/rust/pull/46095
748 [46666]: https://github.com/rust-lang/rust/pull/46666
749 [46196]: https://github.com/rust-lang/rust/pull/46196
750 [cargo/5013]: https://github.com/rust-lang/cargo/pull/5013
751 [cargo/5029]: https://github.com/rust-lang/cargo/pull/5029
752 [RFC 1358]: https://github.com/rust-lang/rfcs/pull/1358
753 [`Location::column`]: https://doc.rust-lang.org/std/panic/struct.Location.html#method.column
754 [`ptr::NonNull`]: https://doc.rust-lang.org/std/ptr/struct.NonNull.html
757 Version 1.24.1 (2018-03-01)
758 ==========================
760 - [Do not abort when unwinding through FFI][48251]
761 - [Emit UTF-16 files for linker arguments on Windows][48318]
762 - [Make the error index generator work again][48308]
763 - [Cargo will warn on Windows 7 if an update is needed][cargo/5069].
765 [48251]: https://github.com/rust-lang/rust/issues/48251
766 [48308]: https://github.com/rust-lang/rust/issues/48308
767 [48318]: https://github.com/rust-lang/rust/issues/48318
768 [cargo/5069]: https://github.com/rust-lang/cargo/pull/5069
771 Version 1.24.0 (2018-02-15)
772 ==========================
776 - [External `sysv64` ffi is now available.][46528]
777 eg. `extern "sysv64" fn foo () {}`
781 - [rustc now uses 16 codegen units by default for release builds.][46910]
782 For the fastest builds, utilize `codegen-units=1`.
783 - [Added `armv4t-unknown-linux-gnueabi` target.][47018]
784 - [Add `aarch64-unknown-openbsd` support][46760]
788 - [`str::find::<char>` now uses memchr.][46735] This should lead to a 10x
789 improvement in performance in the majority of cases.
790 - [`OsStr`'s `Debug` implementation is now lossless and consistent
791 with Windows.][46798]
792 - [`time::{SystemTime, Instant}` now implement `Hash`.][46828]
793 - [impl `From<bool>` for `AtomicBool`][46293]
794 - [impl `From<{CString, &CStr}>` for `{Arc<CStr>, Rc<CStr>}`][45990]
795 - [impl `From<{OsString, &OsStr}>` for `{Arc<OsStr>, Rc<OsStr>}`][45990]
796 - [impl `From<{PathBuf, &Path}>` for `{Arc<Path>, Rc<Path>}`][45990]
797 - [float::from_bits now just uses transmute.][46012] This provides
798 some optimisations from LLVM.
799 - [Copied `AsciiExt` methods onto `char`][46077]
800 - [Remove `T: Sized` requirement on `ptr::is_null()`][46094]
801 - [impl `From<RecvError>` for `{TryRecvError, RecvTimeoutError}`][45506]
802 - [Optimised `f32::{min, max}` to generate more efficient x86 assembly][47080]
803 - [`[u8]::contains` now uses memchr which provides a 3x speed improvement][46713]
807 - [`RefCell::replace`]
809 - [`atomic::spin_loop_hint`]
811 The following functions can now be used in a constant expression.
812 eg. `let buffer: [u8; size_of::<usize>()];`, `static COUNTER: AtomicUsize = AtomicUsize::new(1);`
814 - [`AtomicBool::new`][46287]
815 - [`AtomicUsize::new`][46287]
816 - [`AtomicIsize::new`][46287]
817 - [`AtomicPtr::new`][46287]
818 - [`Cell::new`][46287]
819 - [`{integer}::min_value`][46287]
820 - [`{integer}::max_value`][46287]
821 - [`mem::size_of`][46287]
822 - [`mem::align_of`][46287]
823 - [`ptr::null`][46287]
824 - [`ptr::null_mut`][46287]
825 - [`RefCell::new`][46287]
826 - [`UnsafeCell::new`][46287]
830 - [Added a `workspace.default-members` config that
831 overrides implied `--all` in virtual workspaces.][cargo/4743]
832 - [Enable incremental by default on development builds.][cargo/4817] Also added
833 configuration keys to `Cargo.toml` and `.cargo/config` to disable on a
834 per-project or global basis respectively.
841 - [Floating point types `Debug` impl now always prints a decimal point.][46831]
842 - [`Ipv6Addr` now rejects superfluous `::`'s in IPv6 addresses][46671] This is
843 in accordance with IETF RFC 4291 §2.2.
844 - [Unwinding will no longer go past FFI boundaries, and will instead abort.][46833]
845 - [`Formatter::flags` method is now deprecated.][46284] The `sign_plus`,
846 `sign_minus`, `alternate`, and `sign_aware_zero_pad` should be used instead.
847 - [Leading zeros in tuple struct members is now an error][47084]
848 - [`column!()` macro is one-based instead of zero-based][46977]
849 - [`fmt::Arguments` can no longer be shared across threads][45198]
850 - [Access to `#[repr(packed)]` struct fields is now unsafe][44884]
851 - [Cargo sets a different working directory for the compiler][cargo/4788]
853 [44884]: https://github.com/rust-lang/rust/pull/44884
854 [45198]: https://github.com/rust-lang/rust/pull/45198
855 [45506]: https://github.com/rust-lang/rust/pull/45506
856 [45904]: https://github.com/rust-lang/rust/pull/45904
857 [45990]: https://github.com/rust-lang/rust/pull/45990
858 [46012]: https://github.com/rust-lang/rust/pull/46012
859 [46077]: https://github.com/rust-lang/rust/pull/46077
860 [46094]: https://github.com/rust-lang/rust/pull/46094
861 [46284]: https://github.com/rust-lang/rust/pull/46284
862 [46287]: https://github.com/rust-lang/rust/pull/46287
863 [46293]: https://github.com/rust-lang/rust/pull/46293
864 [46528]: https://github.com/rust-lang/rust/pull/46528
865 [46671]: https://github.com/rust-lang/rust/pull/46671
866 [46713]: https://github.com/rust-lang/rust/pull/46713
867 [46735]: https://github.com/rust-lang/rust/pull/46735
868 [46749]: https://github.com/rust-lang/rust/pull/46749
869 [46760]: https://github.com/rust-lang/rust/pull/46760
870 [46798]: https://github.com/rust-lang/rust/pull/46798
871 [46828]: https://github.com/rust-lang/rust/pull/46828
872 [46831]: https://github.com/rust-lang/rust/pull/46831
873 [46833]: https://github.com/rust-lang/rust/pull/46833
874 [46910]: https://github.com/rust-lang/rust/pull/46910
875 [46977]: https://github.com/rust-lang/rust/pull/46977
876 [47018]: https://github.com/rust-lang/rust/pull/47018
877 [47080]: https://github.com/rust-lang/rust/pull/47080
878 [47084]: https://github.com/rust-lang/rust/pull/47084
879 [cargo/4743]: https://github.com/rust-lang/cargo/pull/4743
880 [cargo/4788]: https://github.com/rust-lang/cargo/pull/4788
881 [cargo/4817]: https://github.com/rust-lang/cargo/pull/4817
882 [`RefCell::replace`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.replace
883 [`RefCell::swap`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.swap
884 [`atomic::spin_loop_hint`]: https://doc.rust-lang.org/std/sync/atomic/fn.spin_loop_hint.html
887 Version 1.23.0 (2018-01-04)
888 ==========================
892 - [Arbitrary `auto` traits are now permitted in trait objects.][45772]
893 - [rustc now uses subtyping on the left hand side of binary operations.][45435]
894 Which should fix some confusing errors in some operations.
898 - [Enabled `TrapUnreachable` in LLVM which should mitigate the impact of
899 undefined behaviour.][45920]
900 - [rustc now suggests renaming import if names clash.][45660]
901 - [Display errors/warnings correctly when there are zero-width or
902 wide characters.][45711]
903 - [rustc now avoids unnecessary copies of arguments that are
904 simple bindings][45380] This should improve memory usage on average by 5-10%.
905 - [Updated musl used to build musl rustc to 1.1.17][45393]
909 - [Allow a trailing comma in `assert_eq/ne` macro][45887]
910 - [Implement Hash for raw pointers to unsized types][45483]
911 - [impl `From<*mut T>` for `AtomicPtr<T>`][45610]
912 - [impl `From<usize/isize>` for `AtomicUsize/AtomicIsize`.][45610]
913 - [Removed the `T: Sync` requirement for `RwLock<T>: Send`][45267]
914 - [Removed `T: Sized` requirement for `{<*const T>, <*mut T>}::as_ref`
915 and `<*mut T>::as_mut`][44932]
916 - [Optimized `Thread::{park, unpark}` implementation][45524]
917 - [Improved `SliceExt::binary_search` performance.][45333]
918 - [impl `FromIterator<()>` for `()`][45379]
919 - [Copied `AsciiExt` trait methods to primitive types.][44042] Use of `AsciiExt`
927 - [Cargo now supports uninstallation of multiple packages][cargo/4561]
928 eg. `cargo uninstall foo bar` uninstalls `foo` and `bar`.
929 - [Added unit test checking to `cargo check`][cargo/4592]
930 - [Cargo now lets you install a specific version
931 using `cargo install --version`][cargo/4637]
935 - [Releases now ship with the Cargo book documentation.][45692]
936 - [rustdoc now prints rendering warnings on every run.][45324]
940 - [Changes have been made to type equality to make it more correct,
941 in rare cases this could break some code.][45853] [Tracking issue for
942 further information][45852]
943 - [`char::escape_debug` now uses Unicode 10 over 9.][45571]
944 - [Upgraded Android SDK to 27, and NDK to r15c.][45580] This drops support for
945 Android 9, the minimum supported version is Android 14.
946 - [Bumped the minimum LLVM to 3.9][45326]
948 [44042]: https://github.com/rust-lang/rust/pull/44042
949 [44932]: https://github.com/rust-lang/rust/pull/44932
950 [45267]: https://github.com/rust-lang/rust/pull/45267
951 [45324]: https://github.com/rust-lang/rust/pull/45324
952 [45326]: https://github.com/rust-lang/rust/pull/45326
953 [45333]: https://github.com/rust-lang/rust/pull/45333
954 [45379]: https://github.com/rust-lang/rust/pull/45379
955 [45380]: https://github.com/rust-lang/rust/pull/45380
956 [45393]: https://github.com/rust-lang/rust/pull/45393
957 [45435]: https://github.com/rust-lang/rust/pull/45435
958 [45483]: https://github.com/rust-lang/rust/pull/45483
959 [45524]: https://github.com/rust-lang/rust/pull/45524
960 [45571]: https://github.com/rust-lang/rust/pull/45571
961 [45580]: https://github.com/rust-lang/rust/pull/45580
962 [45610]: https://github.com/rust-lang/rust/pull/45610
963 [45660]: https://github.com/rust-lang/rust/pull/45660
964 [45692]: https://github.com/rust-lang/rust/pull/45692
965 [45711]: https://github.com/rust-lang/rust/pull/45711
966 [45772]: https://github.com/rust-lang/rust/pull/45772
967 [45852]: https://github.com/rust-lang/rust/issues/45852
968 [45853]: https://github.com/rust-lang/rust/pull/45853
969 [45887]: https://github.com/rust-lang/rust/pull/45887
970 [45920]: https://github.com/rust-lang/rust/pull/45920
971 [cargo/4561]: https://github.com/rust-lang/cargo/pull/4561
972 [cargo/4592]: https://github.com/rust-lang/cargo/pull/4592
973 [cargo/4637]: https://github.com/rust-lang/cargo/pull/4637
976 Version 1.22.1 (2017-11-22)
977 ==========================
979 - [Update Cargo to fix an issue with macOS 10.13 "High Sierra"][46183]
981 [46183]: https://github.com/rust-lang/rust/pull/46183
983 Version 1.22.0 (2017-11-22)
984 ==========================
988 - [`non_snake_case` lint now allows extern no-mangle functions][44966]
989 - [Now accepts underscores in unicode escapes][43716]
990 - [`T op= &T` now works for numeric types.][44287] eg. `let mut x = 2; x += &8;`
991 - [types that impl `Drop` are now allowed in `const` and `static` types][44456]
995 - [rustc now defaults to having 16 codegen units at debug on supported platforms.][45064]
996 - [rustc will no longer inline in codegen units when compiling for debug][45075]
997 This should decrease compile times for debug builds.
998 - [strict memory alignment now enabled on ARMv6][45094]
999 - [Remove support for the PNaCl target `le32-unknown-nacl`][45041]
1003 - [Allow atomic operations up to 32 bits
1004 on `armv5te_unknown_linux_gnueabi`][44978]
1005 - [`Box<Error>` now impls `From<Cow<str>>`][44466]
1006 - [`std::mem::Discriminant` is now guaranteed to be `Send + Sync`][45095]
1007 - [`fs::copy` now returns the length of the main stream on NTFS.][44895]
1008 - [Properly detect overflow in `Instant += Duration`.][44220]
1009 - [impl `Hasher` for `{&mut Hasher, Box<Hasher>}`][44015]
1010 - [impl `fmt::Debug` for `SplitWhitespace`.][44303]
1011 - [`Option<T>` now impls `Try`][42526] This allows for using `?` with `Option` types.
1018 - [Cargo will now build multi file examples in subdirectories of the `examples`
1019 folder that have a `main.rs` file.][cargo/4496]
1020 - [Changed `[root]` to `[package]` in `Cargo.lock`][cargo/4571] Packages with
1021 the old format will continue to work and can be updated with `cargo update`.
1022 - [Now supports vendoring git repositories][cargo/3992]
1026 - [`libbacktrace` is now available on Apple platforms.][44251]
1027 - [Stabilised the `compile_fail` attribute for code fences in doc-comments.][43949]
1028 This now lets you specify that a given code example will fail to compile.
1032 - [The minimum Android version that rustc can build for has been bumped
1033 to `4.0` from `2.3`][45656]
1034 - [Allowing `T op= &T` for numeric types has broken some type
1035 inference cases][45480]
1038 [42526]: https://github.com/rust-lang/rust/pull/42526
1039 [43017]: https://github.com/rust-lang/rust/pull/43017
1040 [43716]: https://github.com/rust-lang/rust/pull/43716
1041 [43949]: https://github.com/rust-lang/rust/pull/43949
1042 [44015]: https://github.com/rust-lang/rust/pull/44015
1043 [44220]: https://github.com/rust-lang/rust/pull/44220
1044 [44251]: https://github.com/rust-lang/rust/pull/44251
1045 [44287]: https://github.com/rust-lang/rust/pull/44287
1046 [44303]: https://github.com/rust-lang/rust/pull/44303
1047 [44456]: https://github.com/rust-lang/rust/pull/44456
1048 [44466]: https://github.com/rust-lang/rust/pull/44466
1049 [44895]: https://github.com/rust-lang/rust/pull/44895
1050 [44966]: https://github.com/rust-lang/rust/pull/44966
1051 [44978]: https://github.com/rust-lang/rust/pull/44978
1052 [45041]: https://github.com/rust-lang/rust/pull/45041
1053 [45064]: https://github.com/rust-lang/rust/pull/45064
1054 [45075]: https://github.com/rust-lang/rust/pull/45075
1055 [45094]: https://github.com/rust-lang/rust/pull/45094
1056 [45095]: https://github.com/rust-lang/rust/pull/45095
1057 [45480]: https://github.com/rust-lang/rust/issues/45480
1058 [45656]: https://github.com/rust-lang/rust/pull/45656
1059 [cargo/3992]: https://github.com/rust-lang/cargo/pull/3992
1060 [cargo/4496]: https://github.com/rust-lang/cargo/pull/4496
1061 [cargo/4571]: https://github.com/rust-lang/cargo/pull/4571
1068 Version 1.21.0 (2017-10-12)
1069 ==========================
1073 - [You can now use static references for literals.][43838]
1077 let x: &'static u32 = &0;
1080 - [Relaxed path syntax. Optional `::` before `<` is now allowed in all contexts.][43540]
1083 my_macro!(Vec<i32>::new); // Always worked
1084 my_macro!(Vec::<i32>::new); // Now works
1089 - [Upgraded jemalloc to 4.5.0][43911]
1090 - [Enabled unwinding panics on Redox][43917]
1091 - [Now runs LLVM in parallel during translation phase.][43506]
1092 This should reduce peak memory usage.
1096 - [Generate builtin impls for `Clone` for all arrays and tuples that
1097 are `T: Clone`][43690]
1098 - [`Stdin`, `Stdout`, and `Stderr` now implement `AsRawFd`.][43459]
1099 - [`Rc` and `Arc` now implement `From<&[T]> where T: Clone`, `From<str>`,
1100 `From<String>`, `From<Box<T>> where T: ?Sized`, and `From<Vec<T>>`.][42565]
1105 [`std::mem::discriminant`]
1109 - [You can now call `cargo install` with multiple package names][cargo/4216]
1110 - [Cargo commands inside a virtual workspace will now implicitly
1111 pass `--all`][cargo/4335]
1112 - [Added a `[patch]` section to `Cargo.toml` to handle
1113 prepublication dependencies][cargo/4123] [RFC 1969]
1114 - [`include` & `exclude` fields in `Cargo.toml` now accept gitignore
1115 like patterns][cargo/4270]
1116 - [Added the `--all-targets` option][cargo/4400]
1117 - [Using required dependencies as a feature is now deprecated and emits
1118 a warning][cargo/4364]
1123 - [Cargo docs are moving][43916]
1124 to [doc.rust-lang.org/cargo](https://doc.rust-lang.org/cargo)
1125 - [The rustdoc book is now available][43863]
1126 at [doc.rust-lang.org/rustdoc](https://doc.rust-lang.org/rustdoc)
1127 - [Added a preview of RLS has been made available through rustup][44204]
1128 Install with `rustup component add rls-preview`
1129 - [`std::os` documentation for Unix, Linux, and Windows now appears on doc.rust-lang.org][43348]
1130 Previously only showed `std::os::unix`.
1134 - [Changes in method matching against higher-ranked types][43880] This may cause
1135 breakage in subtyping corner cases. [A more in-depth explanation is available.][info/43880]
1136 - [rustc's JSON error output's byte position start at top of file.][42973]
1137 Was previously relative to the rustc's internal `CodeMap` struct which
1138 required the unstable library `libsyntax` to correctly use.
1139 - [`unused_results` lint no longer ignores booleans][43728]
1141 [42565]: https://github.com/rust-lang/rust/pull/42565
1142 [42973]: https://github.com/rust-lang/rust/pull/42973
1143 [43348]: https://github.com/rust-lang/rust/pull/43348
1144 [43459]: https://github.com/rust-lang/rust/pull/43459
1145 [43506]: https://github.com/rust-lang/rust/pull/43506
1146 [43540]: https://github.com/rust-lang/rust/pull/43540
1147 [43690]: https://github.com/rust-lang/rust/pull/43690
1148 [43728]: https://github.com/rust-lang/rust/pull/43728
1149 [43838]: https://github.com/rust-lang/rust/pull/43838
1150 [43863]: https://github.com/rust-lang/rust/pull/43863
1151 [43880]: https://github.com/rust-lang/rust/pull/43880
1152 [43911]: https://github.com/rust-lang/rust/pull/43911
1153 [43916]: https://github.com/rust-lang/rust/pull/43916
1154 [43917]: https://github.com/rust-lang/rust/pull/43917
1155 [44204]: https://github.com/rust-lang/rust/pull/44204
1156 [cargo/4123]: https://github.com/rust-lang/cargo/pull/4123
1157 [cargo/4216]: https://github.com/rust-lang/cargo/pull/4216
1158 [cargo/4270]: https://github.com/rust-lang/cargo/pull/4270
1159 [cargo/4335]: https://github.com/rust-lang/cargo/pull/4335
1160 [cargo/4364]: https://github.com/rust-lang/cargo/pull/4364
1161 [cargo/4400]: https://github.com/rust-lang/cargo/pull/4400
1162 [RFC 1969]: https://github.com/rust-lang/rfcs/pull/1969
1163 [info/43880]: https://github.com/rust-lang/rust/issues/44224#issuecomment-330058902
1164 [`std::mem::discriminant`]: https://doc.rust-lang.org/std/mem/fn.discriminant.html
1166 Version 1.20.0 (2017-08-31)
1167 ===========================
1171 - [Associated constants are now stabilised.][42809]
1172 - [A lot of macro bugs are now fixed.][42913]
1177 - [Struct fields are now properly coerced to the expected field type.][42807]
1178 - [Enabled wasm LLVM backend][42571] WASM can now be built with the
1179 `wasm32-experimental-emscripten` target.
1180 - [Changed some of the error messages to be more helpful.][42033]
1181 - [Add support for RELRO(RELocation Read-Only) for platforms that support
1183 - [rustc now reports the total number of errors on compilation failure][43015]
1184 previously this was only the number of errors in the pass that failed.
1185 - [Expansion in rustc has been sped up 29x.][42533]
1186 - [added `msp430-none-elf` target.][43099]
1187 - [rustc will now suggest one-argument enum variant to fix type mismatch when
1189 - [Fixes backtraces on Redox][43228]
1190 - [rustc now identifies different versions of same crate when absolute paths of
1191 different types match in an error message.][42826]
1197 - [Relaxed Debug constraints on `{HashMap,BTreeMap}::{Keys,Values}`.][42854]
1198 - [Impl `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Debug`, `Hash` for unsized
1200 - [Impl `fmt::{Display, Debug}` for `Ref`, `RefMut`, `MutexGuard`,
1201 `RwLockReadGuard`, `RwLockWriteGuard`][42822]
1202 - [Impl `Clone` for `DefaultHasher`.][42799]
1203 - [Impl `Sync` for `SyncSender`.][42397]
1204 - [Impl `FromStr` for `char`][42271]
1205 - [Fixed how `{f32, f64}::{is_sign_negative, is_sign_positive}` handles
1207 - [allow messages in the `unimplemented!()` macro.][42155]
1208 ie. `unimplemented!("Waiting for 1.21 to be stable")`
1209 - [`pub(restricted)` is now supported in the `thread_local!` macro.][43185]
1210 - [Upgrade to Unicode 10.0.0][42999]
1211 - [Reimplemented `{f32, f64}::{min, max}` in Rust instead of using CMath.][42430]
1212 - [Skip the main thread's manual stack guard on Linux][43072]
1213 - [Iterator::nth for `ops::{Range, RangeFrom}` is now done in O(1) time][43077]
1214 - [`#[repr(align(N))]` attribute max number is now 2^31 - 1.][43097] This was
1216 - [`{OsStr, Path}::Display` now avoids allocations where possible][42613]
1221 - [`CStr::into_c_string`]
1222 - [`CString::as_c_str`]
1223 - [`CString::into_boxed_c_str`]
1224 - [`Chain::get_mut`]
1225 - [`Chain::get_ref`]
1226 - [`Chain::into_inner`]
1227 - [`Option::get_or_insert_with`]
1228 - [`Option::get_or_insert`]
1229 - [`OsStr::into_os_string`]
1230 - [`OsString::into_boxed_os_str`]
1233 - [`Utf8Error::error_len`]
1234 - [`char::EscapeDebug`]
1235 - [`char::escape_debug`]
1236 - [`compile_error!`]
1237 - [`f32::from_bits`]
1239 - [`f64::from_bits`]
1241 - [`mem::ManuallyDrop`]
1242 - [`slice::sort_unstable_by_key`]
1243 - [`slice::sort_unstable_by`]
1244 - [`slice::sort_unstable`]
1245 - [`str::from_boxed_utf8_unchecked`]
1246 - [`str::as_bytes_mut`]
1247 - [`str::as_bytes_mut`]
1248 - [`str::from_utf8_mut`]
1249 - [`str::from_utf8_unchecked_mut`]
1251 - [`str::get_unchecked_mut`]
1252 - [`str::get_unchecked`]
1254 - [`str::into_boxed_bytes`]
1259 - [Cargo API token location moved from `~/.cargo/config` to
1260 `~/.cargo/credentials`.][cargo/3978]
1261 - [Cargo will now build `main.rs` binaries that are in sub-directories of
1262 `src/bin`.][cargo/4214] ie. Having `src/bin/server/main.rs` and
1263 `src/bin/client/main.rs` generates `target/debug/server` and `target/debug/client`
1264 - [You can now specify version of a binary when installed through
1265 `cargo install` using `--vers`.][cargo/4229]
1266 - [Added `--no-fail-fast` flag to cargo to run all benchmarks regardless of
1267 failure.][cargo/4248]
1268 - [Changed the convention around which file is the crate root.][cargo/4259]
1269 - [The `include`/`exclude` property in `Cargo.toml` now accepts gitignore paths
1270 instead of glob patterns][cargo/4270]. Glob patterns are now deprecated.
1275 - [Functions with `'static` in their return types will now not be as usable as
1276 if they were using lifetime parameters instead.][42417]
1277 - [The reimplementation of `{f32, f64}::is_sign_{negative, positive}` now
1278 takes the sign of NaN into account where previously didn't.][42430]
1280 [42033]: https://github.com/rust-lang/rust/pull/42033
1281 [42155]: https://github.com/rust-lang/rust/pull/42155
1282 [42271]: https://github.com/rust-lang/rust/pull/42271
1283 [42397]: https://github.com/rust-lang/rust/pull/42397
1284 [42417]: https://github.com/rust-lang/rust/pull/42417
1285 [42430]: https://github.com/rust-lang/rust/pull/42430
1286 [42431]: https://github.com/rust-lang/rust/pull/42431
1287 [42533]: https://github.com/rust-lang/rust/pull/42533
1288 [42571]: https://github.com/rust-lang/rust/pull/42571
1289 [42613]: https://github.com/rust-lang/rust/pull/42613
1290 [42799]: https://github.com/rust-lang/rust/pull/42799
1291 [42807]: https://github.com/rust-lang/rust/pull/42807
1292 [42809]: https://github.com/rust-lang/rust/pull/42809
1293 [42822]: https://github.com/rust-lang/rust/pull/42822
1294 [42826]: https://github.com/rust-lang/rust/pull/42826
1295 [42854]: https://github.com/rust-lang/rust/pull/42854
1296 [42913]: https://github.com/rust-lang/rust/pull/42913
1297 [42999]: https://github.com/rust-lang/rust/pull/42999
1298 [43011]: https://github.com/rust-lang/rust/pull/43011
1299 [43015]: https://github.com/rust-lang/rust/pull/43015
1300 [43072]: https://github.com/rust-lang/rust/pull/43072
1301 [43077]: https://github.com/rust-lang/rust/pull/43077
1302 [43097]: https://github.com/rust-lang/rust/pull/43097
1303 [43099]: https://github.com/rust-lang/rust/pull/43099
1304 [43170]: https://github.com/rust-lang/rust/pull/43170
1305 [43178]: https://github.com/rust-lang/rust/pull/43178
1306 [43185]: https://github.com/rust-lang/rust/pull/43185
1307 [43228]: https://github.com/rust-lang/rust/pull/43228
1308 [cargo/3978]: https://github.com/rust-lang/cargo/pull/3978
1309 [cargo/4214]: https://github.com/rust-lang/cargo/pull/4214
1310 [cargo/4229]: https://github.com/rust-lang/cargo/pull/4229
1311 [cargo/4248]: https://github.com/rust-lang/cargo/pull/4248
1312 [cargo/4259]: https://github.com/rust-lang/cargo/pull/4259
1313 [cargo/4270]: https://github.com/rust-lang/cargo/pull/4270
1314 [`CStr::into_c_string`]: https://doc.rust-lang.org/std/ffi/struct.CStr.html#method.into_c_string
1315 [`CString::as_c_str`]: https://doc.rust-lang.org/std/ffi/struct.CString.html#method.as_c_str
1316 [`CString::into_boxed_c_str`]: https://doc.rust-lang.org/std/ffi/struct.CString.html#method.into_boxed_c_str
1317 [`Chain::get_mut`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.get_mut
1318 [`Chain::get_ref`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.get_ref
1319 [`Chain::into_inner`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.into_inner
1320 [`Option::get_or_insert_with`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.get_or_insert_with
1321 [`Option::get_or_insert`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.get_or_insert
1322 [`OsStr::into_os_string`]: https://doc.rust-lang.org/std/ffi/struct.OsStr.html#method.into_os_string
1323 [`OsString::into_boxed_os_str`]: https://doc.rust-lang.org/std/ffi/struct.OsString.html#method.into_boxed_os_str
1324 [`Take::get_mut`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.get_mut
1325 [`Take::get_ref`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.get_ref
1326 [`Utf8Error::error_len`]: https://doc.rust-lang.org/std/str/struct.Utf8Error.html#method.error_len
1327 [`char::EscapeDebug`]: https://doc.rust-lang.org/std/char/struct.EscapeDebug.html
1328 [`char::escape_debug`]: https://doc.rust-lang.org/std/primitive.char.html#method.escape_debug
1329 [`compile_error!`]: https://doc.rust-lang.org/std/macro.compile_error.html
1330 [`f32::from_bits`]: https://doc.rust-lang.org/std/primitive.f32.html#method.from_bits
1331 [`f32::to_bits`]: https://doc.rust-lang.org/std/primitive.f32.html#method.to_bits
1332 [`f64::from_bits`]: https://doc.rust-lang.org/std/primitive.f64.html#method.from_bits
1333 [`f64::to_bits`]: https://doc.rust-lang.org/std/primitive.f64.html#method.to_bits
1334 [`mem::ManuallyDrop`]: https://doc.rust-lang.org/std/mem/union.ManuallyDrop.html
1335 [`slice::sort_unstable_by_key`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable_by_key
1336 [`slice::sort_unstable_by`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable_by
1337 [`slice::sort_unstable`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable
1338 [`str::from_boxed_utf8_unchecked`]: https://doc.rust-lang.org/std/str/fn.from_boxed_utf8_unchecked.html
1339 [`str::as_bytes_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.as_bytes_mut
1340 [`str::from_utf8_mut`]: https://doc.rust-lang.org/std/str/fn.from_utf8_mut.html
1341 [`str::from_utf8_unchecked_mut`]: https://doc.rust-lang.org/std/str/fn.from_utf8_unchecked_mut.html
1342 [`str::get_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_mut
1343 [`str::get_unchecked_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_unchecked_mut
1344 [`str::get_unchecked`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_unchecked
1345 [`str::get`]: https://doc.rust-lang.org/std/primitive.str.html#method.get
1346 [`str::into_boxed_bytes`]: https://doc.rust-lang.org/std/primitive.str.html#method.into_boxed_bytes
1349 Version 1.19.0 (2017-07-20)
1350 ===========================
1355 - [Numeric fields can now be used for creating tuple structs.][41145] [RFC 1506]
1356 For example `struct Point(u32, u32); let x = Point { 0: 7, 1: 0 };`.
1357 - [Macro recursion limit increased to 1024 from 64.][41676]
1358 - [Added lint for detecting unused macros.][41907]
1359 - [`loop` can now return a value with `break`.][42016] [RFC 1624]
1360 For example: `let x = loop { break 7; };`
1361 - [C compatible `union`s are now available.][42068] [RFC 1444] They can only
1362 contain `Copy` types and cannot have a `Drop` implementation.
1363 Example: `union Foo { bar: u8, baz: usize }`
1364 - [Non capturing closures can now be coerced into `fn`s,][42162] [RFC 1558]
1365 Example: `let foo: fn(u8) -> u8 = |v: u8| { v };`
1370 - [Add support for bootstrapping the Rust compiler toolchain on Android.][41370]
1371 - [Change `arm-linux-androideabi` to correspond to the `armeabi`
1372 official ABI.][41656] If you wish to continue targeting the `armeabi-v7a` ABI
1373 you should use `--target armv7-linux-androideabi`.
1374 - [Fixed ICE when removing a source file between compilation sessions.][41873]
1375 - [Minor optimisation of string operations.][42037]
1376 - [Compiler error message is now `aborting due to previous error(s)` instead of
1377 `aborting due to N previous errors`][42150] This was previously inaccurate and
1378 would only count certain kinds of errors.
1379 - [The compiler now supports Visual Studio 2017][42225]
1380 - [The compiler is now built against LLVM 4.0.1 by default][42948]
1381 - [Added a lot][42264] of [new error codes][42302]
1382 - [Added `target-feature=+crt-static` option][37406] [RFC 1721] Which allows
1383 libraries with C Run-time Libraries(CRT) to be statically linked.
1384 - [Fixed various ARM codegen bugs][42740]
1389 - [`String` now implements `FromIterator<Cow<'a, str>>` and
1390 `Extend<Cow<'a, str>>`][41449]
1391 - [`Vec` now implements `From<&mut [T]>`][41530]
1392 - [`Box<[u8]>` now implements `From<Box<str>>`][41258]
1393 - [`SplitWhitespace` now implements `Clone`][41659]
1394 - [`[u8]::reverse` is now 5x faster and `[u16]::reverse` is now
1396 - [`eprint!` and `eprintln!` macros added to prelude.][41192] Same as the `print!`
1397 macros, but for printing to stderr.
1402 - [`OsString::shrink_to_fit`]
1405 - [`thread::ThreadId`]
1410 - [Build scripts can now add environment variables to the environment
1411 the crate is being compiled in.
1412 Example: `println!("cargo:rustc-env=FOO=bar");`][cargo/3929]
1413 - [Subcommands now replace the current process rather than spawning a new
1414 child process][cargo/3970]
1415 - [Workspace members can now accept glob file patterns][cargo/3979]
1416 - [Added `--all` flag to the `cargo bench` subcommand to run benchmarks of all
1417 the members in a given workspace.][cargo/3988]
1418 - [Updated `libssh2-sys` to 0.2.6][cargo/4008]
1419 - [Target directory path is now in the cargo metadata][cargo/4022]
1420 - [Cargo no longer checks out a local working directory for the
1421 crates.io index][cargo/4026] This should provide smaller file size for the
1422 registry, and improve cloning times, especially on Windows machines.
1423 - [Added an `--exclude` option for excluding certain packages when using the
1424 `--all` option][cargo/4031]
1425 - [Cargo will now automatically retry when receiving a 5xx error
1426 from crates.io][cargo/4032]
1427 - [The `--features` option now accepts multiple comma or space
1428 delimited values.][cargo/4084]
1429 - [Added support for custom target specific runners][cargo/3954]
1434 - [Added `rust-windbg.cmd`][39983] for loading rust `.natvis` files in the
1436 - [Rust will now release XZ compressed packages][rust-installer/57]
1437 - [rustup will now prefer to download rust packages with
1438 XZ compression][rustup/1100] over GZip packages.
1439 - [Added the ability to escape `#` in rust documentation][41785] By adding
1440 additional `#`'s ie. `##` is now `#`
1445 - [`MutexGuard<T>` may only be `Sync` if `T` is `Sync`.][41624]
1446 - [`-Z` flags are now no longer allowed to be used on the stable
1447 compiler.][41751] This has been a warning for a year previous to this.
1448 - [As a result of the `-Z` flag change, the `cargo-check` plugin no
1449 longer works][42844]. Users should migrate to the built-in `check`
1450 command, which has been available since 1.16.
1451 - [Ending a float literal with `._` is now a hard error.
1452 Example: `42._` .][41946]
1453 - [Any use of a private `extern crate` outside of its module is now a
1454 hard error.][36886] This was previously a warning.
1455 - [`use ::self::foo;` is now a hard error.][36888] `self` paths are always
1456 relative while the `::` prefix makes a path absolute, but was ignored and the
1457 path was relative regardless.
1458 - [Floating point constants in match patterns is now a hard error][36890]
1459 This was previously a warning.
1460 - [Struct or enum constants that don't derive `PartialEq` & `Eq` used
1461 match patterns is now a hard error][36891] This was previously a warning.
1462 - [Lifetimes named `'_` are no longer allowed.][36892] This was previously
1464 - [From the pound escape, lines consisting of multiple `#`s are
1466 - [It is an error to re-export private enum variants][42460]. This is
1467 known to break a number of crates that depend on an older version of
1469 - [On Windows, if `VCINSTALLDIR` is set incorrectly, `rustc` will try
1470 to use it to find the linker, and the build will fail where it did
1471 not previously][42607]
1473 [36886]: https://github.com/rust-lang/rust/issues/36886
1474 [36888]: https://github.com/rust-lang/rust/issues/36888
1475 [36890]: https://github.com/rust-lang/rust/issues/36890
1476 [36891]: https://github.com/rust-lang/rust/issues/36891
1477 [36892]: https://github.com/rust-lang/rust/issues/36892
1478 [37406]: https://github.com/rust-lang/rust/issues/37406
1479 [39983]: https://github.com/rust-lang/rust/pull/39983
1480 [41145]: https://github.com/rust-lang/rust/pull/41145
1481 [41192]: https://github.com/rust-lang/rust/pull/41192
1482 [41258]: https://github.com/rust-lang/rust/pull/41258
1483 [41370]: https://github.com/rust-lang/rust/pull/41370
1484 [41449]: https://github.com/rust-lang/rust/pull/41449
1485 [41530]: https://github.com/rust-lang/rust/pull/41530
1486 [41624]: https://github.com/rust-lang/rust/pull/41624
1487 [41656]: https://github.com/rust-lang/rust/pull/41656
1488 [41659]: https://github.com/rust-lang/rust/pull/41659
1489 [41676]: https://github.com/rust-lang/rust/pull/41676
1490 [41751]: https://github.com/rust-lang/rust/pull/41751
1491 [41764]: https://github.com/rust-lang/rust/pull/41764
1492 [41785]: https://github.com/rust-lang/rust/pull/41785
1493 [41873]: https://github.com/rust-lang/rust/pull/41873
1494 [41907]: https://github.com/rust-lang/rust/pull/41907
1495 [41946]: https://github.com/rust-lang/rust/pull/41946
1496 [42016]: https://github.com/rust-lang/rust/pull/42016
1497 [42037]: https://github.com/rust-lang/rust/pull/42037
1498 [42068]: https://github.com/rust-lang/rust/pull/42068
1499 [42150]: https://github.com/rust-lang/rust/pull/42150
1500 [42162]: https://github.com/rust-lang/rust/pull/42162
1501 [42225]: https://github.com/rust-lang/rust/pull/42225
1502 [42264]: https://github.com/rust-lang/rust/pull/42264
1503 [42302]: https://github.com/rust-lang/rust/pull/42302
1504 [42460]: https://github.com/rust-lang/rust/issues/42460
1505 [42607]: https://github.com/rust-lang/rust/issues/42607
1506 [42740]: https://github.com/rust-lang/rust/pull/42740
1507 [42844]: https://github.com/rust-lang/rust/issues/42844
1508 [42948]: https://github.com/rust-lang/rust/pull/42948
1509 [RFC 1444]: https://github.com/rust-lang/rfcs/pull/1444
1510 [RFC 1506]: https://github.com/rust-lang/rfcs/pull/1506
1511 [RFC 1558]: https://github.com/rust-lang/rfcs/pull/1558
1512 [RFC 1624]: https://github.com/rust-lang/rfcs/pull/1624
1513 [RFC 1721]: https://github.com/rust-lang/rfcs/pull/1721
1514 [`Command::envs`]: https://doc.rust-lang.org/std/process/struct.Command.html#method.envs
1515 [`OsString::shrink_to_fit`]: https://doc.rust-lang.org/std/ffi/struct.OsString.html#method.shrink_to_fit
1516 [`cmp::Reverse`]: https://doc.rust-lang.org/std/cmp/struct.Reverse.html
1517 [`thread::ThreadId`]: https://doc.rust-lang.org/std/thread/struct.ThreadId.html
1518 [cargo/3929]: https://github.com/rust-lang/cargo/pull/3929
1519 [cargo/3954]: https://github.com/rust-lang/cargo/pull/3954
1520 [cargo/3970]: https://github.com/rust-lang/cargo/pull/3970
1521 [cargo/3979]: https://github.com/rust-lang/cargo/pull/3979
1522 [cargo/3988]: https://github.com/rust-lang/cargo/pull/3988
1523 [cargo/4008]: https://github.com/rust-lang/cargo/pull/4008
1524 [cargo/4022]: https://github.com/rust-lang/cargo/pull/4022
1525 [cargo/4026]: https://github.com/rust-lang/cargo/pull/4026
1526 [cargo/4031]: https://github.com/rust-lang/cargo/pull/4031
1527 [cargo/4032]: https://github.com/rust-lang/cargo/pull/4032
1528 [cargo/4084]: https://github.com/rust-lang/cargo/pull/4084
1529 [rust-installer/57]: https://github.com/rust-lang/rust-installer/pull/57
1530 [rustup/1100]: https://github.com/rust-lang-nursery/rustup.rs/pull/1100
1533 Version 1.18.0 (2017-06-08)
1534 ===========================
1539 - [Stabilize pub(restricted)][40556] `pub` can now accept a module path to
1540 make the item visible to just that module tree. Also accepts the keyword
1541 `crate` to make something public to the whole crate but not users of the
1542 library. Example: `pub(crate) mod utils;`. [RFC 1422].
1543 - [Stabilize `#![windows_subsystem]` attribute][40870] conservative exposure of the
1544 `/SUBSYSTEM` linker flag on Windows platforms. [RFC 1665].
1545 - [Refactor of trait object type parsing][40043] Now `ty` in macros can accept
1546 types like `Write + Send`, trailing `+` are now supported in trait objects,
1547 and better error reporting for trait objects starting with `?Sized`.
1548 - [0e+10 is now a valid floating point literal][40589]
1549 - [Now warns if you bind a lifetime parameter to 'static][40734]
1550 - [Tuples, Enum variant fields, and structs with no `repr` attribute or with
1551 `#[repr(Rust)]` are reordered to minimize padding and produce a smaller
1552 representation in some cases.][40377]
1557 - [rustc can now emit mir with `--emit mir`][39891]
1558 - [Improved LLVM IR for trivial functions][40367]
1559 - [Added explanation for E0090(Wrong number of lifetimes are supplied)][40723]
1560 - [rustc compilation is now 15%-20% faster][41469] Thanks to optimisation
1561 opportunities found through profiling
1562 - [Improved backtrace formatting when panicking][38165]
1567 - [Specialized `Vec::from_iter` being passed `vec::IntoIter`][40731] if the
1568 iterator hasn't been advanced the original `Vec` is reassembled with no actual
1569 iteration or reallocation.
1570 - [Simplified HashMap Bucket interface][40561] provides performance
1571 improvements for iterating and cloning.
1572 - [Specialize Vec::from_elem to use calloc][40409]
1573 - [Fixed Race condition in fs::create_dir_all][39799]
1574 - [No longer caching stdio on Windows][40516]
1575 - [Optimized insertion sort in slice][40807] insertion sort in some cases
1576 2.50%~ faster and in one case now 12.50% faster.
1577 - [Optimized `AtomicBool::fetch_nand`][41143]
1582 - [`Child::try_wait`]
1583 - [`HashMap::retain`]
1584 - [`HashSet::retain`]
1586 - [`TcpStream::peek`]
1587 - [`UdpSocket::peek`]
1588 - [`UdpSocket::peek_from`]
1593 - [Added partial Pijul support][cargo/3842] Pijul is a version control system in Rust.
1594 You can now create new cargo projects with Pijul using `cargo new --vcs pijul`
1595 - [Now always emits build script warnings for crates that fail to build][cargo/3847]
1596 - [Added Android build support][cargo/3885]
1597 - [Added `--bins` and `--tests` flags][cargo/3901] now you can build all programs
1598 of a certain type, for example `cargo build --bins` will build all
1600 - [Added support for haiku][cargo/3952]
1605 - [rustdoc can now use pulldown-cmark with the `--enable-commonmark` flag][40338]
1606 - [Added rust-windbg script for better debugging on Windows][39983]
1607 - [Rust now uses the official cross compiler for NetBSD][40612]
1608 - [rustdoc now accepts `#` at the start of files][40828]
1609 - [Fixed jemalloc support for musl][41168]
1614 - [Changes to how the `0` flag works in format!][40241] Padding zeroes are now
1615 always placed after the sign if it exists and before the digits. With the `#`
1616 flag the zeroes are placed after the prefix and before the digits.
1617 - [Due to the struct field optimisation][40377], using `transmute` on structs
1618 that have no `repr` attribute or `#[repr(Rust)]` will no longer work. This has
1619 always been undefined behavior, but is now more likely to break in practice.
1620 - [The refactor of trait object type parsing][40043] fixed a bug where `+` was
1621 receiving the wrong priority parsing things like `&for<'a> Tr<'a> + Send` as
1622 `&(for<'a> Tr<'a> + Send)` instead of `(&for<'a> Tr<'a>) + Send`
1623 - [Overlapping inherent `impl`s are now a hard error][40728]
1624 - [`PartialOrd` and `Ord` must agree on the ordering.][41270]
1625 - [`rustc main.rs -o out --emit=asm,llvm-ir`][41085] Now will output
1626 `out.asm` and `out.ll` instead of only one of the filetypes.
1627 - [ calling a function that returns `Self` will no longer work][41805] when
1628 the size of `Self` cannot be statically determined.
1629 - [rustc now builds with a "pthreads" flavour of MinGW for Windows GNU][40805]
1630 this has caused a few regressions namely:
1632 - Changed the link order of local static/dynamic libraries (respecting the
1633 order on given rather than having the compiler reorder).
1634 - Changed how MinGW is linked, native code linked to dynamic libraries
1635 may require manually linking to the gcc support library (for the native
1638 [38165]: https://github.com/rust-lang/rust/pull/38165
1639 [39799]: https://github.com/rust-lang/rust/pull/39799
1640 [39891]: https://github.com/rust-lang/rust/pull/39891
1641 [39983]: https://github.com/rust-lang/rust/pull/39983
1642 [40043]: https://github.com/rust-lang/rust/pull/40043
1643 [40241]: https://github.com/rust-lang/rust/pull/40241
1644 [40338]: https://github.com/rust-lang/rust/pull/40338
1645 [40367]: https://github.com/rust-lang/rust/pull/40367
1646 [40377]: https://github.com/rust-lang/rust/pull/40377
1647 [40409]: https://github.com/rust-lang/rust/pull/40409
1648 [40516]: https://github.com/rust-lang/rust/pull/40516
1649 [40556]: https://github.com/rust-lang/rust/pull/40556
1650 [40561]: https://github.com/rust-lang/rust/pull/40561
1651 [40589]: https://github.com/rust-lang/rust/pull/40589
1652 [40612]: https://github.com/rust-lang/rust/pull/40612
1653 [40723]: https://github.com/rust-lang/rust/pull/40723
1654 [40728]: https://github.com/rust-lang/rust/pull/40728
1655 [40731]: https://github.com/rust-lang/rust/pull/40731
1656 [40734]: https://github.com/rust-lang/rust/pull/40734
1657 [40805]: https://github.com/rust-lang/rust/pull/40805
1658 [40807]: https://github.com/rust-lang/rust/pull/40807
1659 [40828]: https://github.com/rust-lang/rust/pull/40828
1660 [40870]: https://github.com/rust-lang/rust/pull/40870
1661 [41085]: https://github.com/rust-lang/rust/pull/41085
1662 [41143]: https://github.com/rust-lang/rust/pull/41143
1663 [41168]: https://github.com/rust-lang/rust/pull/41168
1664 [41270]: https://github.com/rust-lang/rust/issues/41270
1665 [41469]: https://github.com/rust-lang/rust/pull/41469
1666 [41805]: https://github.com/rust-lang/rust/issues/41805
1667 [RFC 1422]: https://github.com/rust-lang/rfcs/blob/master/text/1422-pub-restricted.md
1668 [RFC 1665]: https://github.com/rust-lang/rfcs/blob/master/text/1665-windows-subsystem.md
1669 [`Child::try_wait`]: https://doc.rust-lang.org/std/process/struct.Child.html#method.try_wait
1670 [`HashMap::retain`]: https://doc.rust-lang.org/std/collections/struct.HashMap.html#method.retain
1671 [`HashSet::retain`]: https://doc.rust-lang.org/std/collections/struct.HashSet.html#method.retain
1672 [`PeekMut::pop`]: https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html#method.pop
1673 [`TcpStream::peek`]: https://doc.rust-lang.org/std/net/struct.TcpStream.html#method.peek
1674 [`UdpSocket::peek_from`]: https://doc.rust-lang.org/std/net/struct.UdpSocket.html#method.peek_from
1675 [`UdpSocket::peek`]: https://doc.rust-lang.org/std/net/struct.UdpSocket.html#method.peek
1676 [cargo/3842]: https://github.com/rust-lang/cargo/pull/3842
1677 [cargo/3847]: https://github.com/rust-lang/cargo/pull/3847
1678 [cargo/3885]: https://github.com/rust-lang/cargo/pull/3885
1679 [cargo/3901]: https://github.com/rust-lang/cargo/pull/3901
1680 [cargo/3952]: https://github.com/rust-lang/cargo/pull/3952
1683 Version 1.17.0 (2017-04-27)
1684 ===========================
1689 * [The lifetime of statics and consts defaults to `'static`][39265]. [RFC 1623]
1690 * [Fields of structs may be initialized without duplicating the field/variable
1691 names][39761]. [RFC 1682]
1692 * [`Self` may be included in the `where` clause of `impls`][38864]. [RFC 1647]
1693 * [When coercing to an unsized type lifetimes must be equal][40319]. That is,
1694 there is no subtyping between `T` and `U` when `T: Unsize<U>`. For example,
1695 coercing `&mut [&'a X; N]` to `&mut [&'b X]` requires `'a` be equal to
1696 `'b`. Soundness fix.
1697 * [Values passed to the indexing operator, `[]`, automatically coerce][40166]
1698 * [Static variables may contain references to other statics][40027]
1703 * [Exit quickly on only `--emit dep-info`][40336]
1704 * [Make `-C relocation-model` more correctly determine whether the linker
1705 creates a position-independent executable][40245]
1706 * [Add `-C overflow-checks` to directly control whether integer overflow
1708 * [The rustc type checker now checks items on demand instead of in a single
1709 in-order pass][40008]. This is mostly an internal refactoring in support of
1710 future work, including incremental type checking, but also resolves [RFC
1711 1647], allowing `Self` to appear in `impl` `where` clauses.
1712 * [Optimize vtable loads][39995]
1713 * [Turn off vectorization for Emscripten targets][39990]
1714 * [Provide suggestions for unknown macros imported with `use`][39953]
1715 * [Fix ICEs in path resolution][39939]
1716 * [Strip exception handling code on Emscripten when `panic=abort`][39193]
1717 * [Add clearer error message using `&str + &str`][39116]
1728 * [`Ordering::then`]
1729 * [`Ordering::then_with`]
1730 * [`BTreeMap::range`]
1731 * [`BTreeMap::range_mut`]
1732 * [`collections::Bound`]
1733 * [`process::abort`]
1734 * [`ptr::read_unaligned`]
1735 * [`ptr::write_unaligned`]
1736 * [`Result::expect_err`]
1739 * [`Cell::into_inner`]
1745 * [`BTreeMap` and `BTreeSet` can iterate over ranges][27787]
1746 * [`Cell` can store non-`Copy` types][39793]. [RFC 1651]
1747 * [`String` implements `FromIterator<&char>`][40028]
1748 * `Box` [implements][40009] a number of new conversions:
1749 `From<Box<str>> for String`,
1750 `From<Box<[T]>> for Vec<T>`,
1751 `From<Box<CStr>> for CString`,
1752 `From<Box<OsStr>> for OsString`,
1753 `From<Box<Path>> for PathBuf`,
1754 `Into<Box<str>> for String`,
1755 `Into<Box<[T]>> for Vec<T>`,
1756 `Into<Box<CStr>> for CString`,
1757 `Into<Box<OsStr>> for OsString`,
1758 `Into<Box<Path>> for PathBuf`,
1759 `Default for Box<str>`,
1760 `Default for Box<CStr>`,
1761 `Default for Box<OsStr>`,
1762 `From<&CStr> for Box<CStr>`,
1763 `From<&OsStr> for Box<OsStr>`,
1764 `From<&Path> for Box<Path>`
1765 * [`ffi::FromBytesWithNulError` implements `Error` and `Display`][39960]
1766 * [Specialize `PartialOrd<A> for [A] where A: Ord`][39642]
1767 * [Slightly optimize `slice::sort`][39538]
1768 * [Add `ToString` trait specialization for `Cow<'a, str>` and `String`][39440]
1769 * [`Box<[T]>` implements `From<&[T]> where T: Copy`,
1770 `Box<str>` implements `From<&str>`][39438]
1771 * [`IpAddr` implements `From` for various arrays. `SocketAddr` implements
1772 `From<(I, u16)> where I: Into<IpAddr>`][39372]
1773 * [`format!` estimates the needed capacity before writing a string][39356]
1774 * [Support unprivileged symlink creation in Windows][38921]
1775 * [`PathBuf` implements `Default`][38764]
1776 * [Implement `PartialEq<[A]>` for `VecDeque<A>`][38661]
1777 * [`HashMap` resizes adaptively][38368] to guard against DOS attacks
1778 and poor hash functions.
1783 * [Add `cargo check --all`][cargo/3731]
1784 * [Add an option to ignore SSL revocation checking][cargo/3699]
1785 * [Add `cargo run --package`][cargo/3691]
1786 * [Add `required_features`][cargo/3667]
1787 * [Assume `build.rs` is a build script][cargo/3664]
1788 * [Find workspace via `workspace_root` link in containing member][cargo/3562]
1793 * [Documentation is rendered with mdbook instead of the obsolete, in-tree
1795 * [The "Unstable Book" documents nightly-only features][ubook]
1796 * [Improve the style of the sidebar in rustdoc output][40265]
1797 * [Configure build correctly on 64-bit CPU's with the armhf ABI][40261]
1798 * [Fix MSP430 breakage due to `i128`][40257]
1799 * [Preliminary Solaris/SPARCv9 support][39903]
1800 * [`rustc` is linked statically on Windows MSVC targets][39837], allowing it to
1801 run without installing the MSVC runtime.
1802 * [`rustdoc --test` includes file names in test names][39788]
1803 * This release includes builds of `std` for `sparc64-unknown-linux-gnu`,
1804 `aarch64-unknown-linux-fuchsia`, and `x86_64-unknown-linux-fuchsia`.
1805 * [Initial support for `aarch64-unknown-freebsd`][39491]
1806 * [Initial support for `i686-unknown-netbsd`][39426]
1807 * [This release no longer includes the old makefile build system][39431]. Rust
1808 is built with a custom build system, written in Rust, and with Cargo.
1809 * [Add Debug implementations for libcollection structs][39002]
1810 * [`TypeId` implements `PartialOrd` and `Ord`][38981]
1811 * [`--test-threads=0` produces an error][38945]
1812 * [`rustup` installs documentation by default][40526]
1813 * [The Rust source includes NatVis visualizations][39843]. These can be used by
1814 WinDbg and Visual Studio to improve the debugging experience.
1819 * [Rust 1.17 does not correctly detect the MSVC 2017 linker][38584]. As a
1820 workaround, either use MSVC 2015 or run vcvars.bat.
1821 * [When coercing to an unsized type lifetimes must be equal][40319]. That is,
1822 disallow subtyping between `T` and `U` when `T: Unsize<U>`, e.g. coercing
1823 `&mut [&'a X; N]` to `&mut [&'b X]` requires `'a` be equal to `'b`. Soundness
1825 * [`format!` and `Display::to_string` panic if an underlying formatting
1826 implementation returns an error][40117]. Previously the error was silently
1827 ignored. It is incorrect for `write_fmt` to return an error when writing
1829 * [In-tree crates are verified to be unstable][39851]. Previously, some minor
1830 crates were marked stable and could be accessed from the stable toolchain.
1831 * [Rust git source no longer includes vendored crates][39728]. Those that need
1832 to build with vendored crates should build from release tarballs.
1833 * [Fix inert attributes from `proc_macro_derives`][39572]
1834 * [During crate resolution, rustc prefers a crate in the sysroot if two crates
1835 are otherwise identical][39518]. Unlikely to be encountered outside the Rust
1837 * [Fixed bugs around how type inference interacts with dead-code][39485]. The
1838 existing code generally ignores the type of dead-code unless a type-hint is
1839 provided; this can cause surprising inference interactions particularly around
1840 defaulting. The new code uniformly ignores the result type of dead-code.
1841 * [Tuple-struct constructors with private fields are no longer visible][38932]
1842 * [Lifetime parameters that do not appear in the arguments are now considered
1843 early-bound][38897], resolving a soundness bug (#[32330]). The
1844 `hr_lifetime_in_assoc_type` future-compatibility lint has been in effect since
1846 * [rustdoc: fix doctests with non-feature crate attributes][38161]
1847 * [Make transmuting from fn item types to pointer-sized types a hard
1850 [27787]: https://github.com/rust-lang/rust/issues/27787
1851 [32330]: https://github.com/rust-lang/rust/issues/32330
1852 [34198]: https://github.com/rust-lang/rust/pull/34198
1853 [38161]: https://github.com/rust-lang/rust/pull/38161
1854 [38368]: https://github.com/rust-lang/rust/pull/38368
1855 [38584]: https://github.com/rust-lang/rust/issues/38584
1856 [38661]: https://github.com/rust-lang/rust/pull/38661
1857 [38764]: https://github.com/rust-lang/rust/pull/38764
1858 [38864]: https://github.com/rust-lang/rust/issues/38864
1859 [38897]: https://github.com/rust-lang/rust/pull/38897
1860 [38921]: https://github.com/rust-lang/rust/pull/38921
1861 [38932]: https://github.com/rust-lang/rust/pull/38932
1862 [38945]: https://github.com/rust-lang/rust/pull/38945
1863 [38981]: https://github.com/rust-lang/rust/pull/38981
1864 [39002]: https://github.com/rust-lang/rust/pull/39002
1865 [39116]: https://github.com/rust-lang/rust/pull/39116
1866 [39193]: https://github.com/rust-lang/rust/pull/39193
1867 [39265]: https://github.com/rust-lang/rust/pull/39265
1868 [39356]: https://github.com/rust-lang/rust/pull/39356
1869 [39372]: https://github.com/rust-lang/rust/pull/39372
1870 [39426]: https://github.com/rust-lang/rust/pull/39426
1871 [39431]: https://github.com/rust-lang/rust/pull/39431
1872 [39438]: https://github.com/rust-lang/rust/pull/39438
1873 [39440]: https://github.com/rust-lang/rust/pull/39440
1874 [39485]: https://github.com/rust-lang/rust/pull/39485
1875 [39491]: https://github.com/rust-lang/rust/pull/39491
1876 [39518]: https://github.com/rust-lang/rust/pull/39518
1877 [39538]: https://github.com/rust-lang/rust/pull/39538
1878 [39572]: https://github.com/rust-lang/rust/pull/39572
1879 [39633]: https://github.com/rust-lang/rust/pull/39633
1880 [39642]: https://github.com/rust-lang/rust/pull/39642
1881 [39728]: https://github.com/rust-lang/rust/pull/39728
1882 [39761]: https://github.com/rust-lang/rust/pull/39761
1883 [39788]: https://github.com/rust-lang/rust/pull/39788
1884 [39793]: https://github.com/rust-lang/rust/pull/39793
1885 [39837]: https://github.com/rust-lang/rust/pull/39837
1886 [39843]: https://github.com/rust-lang/rust/pull/39843
1887 [39851]: https://github.com/rust-lang/rust/pull/39851
1888 [39903]: https://github.com/rust-lang/rust/pull/39903
1889 [39939]: https://github.com/rust-lang/rust/pull/39939
1890 [39953]: https://github.com/rust-lang/rust/pull/39953
1891 [39960]: https://github.com/rust-lang/rust/pull/39960
1892 [39990]: https://github.com/rust-lang/rust/pull/39990
1893 [39995]: https://github.com/rust-lang/rust/pull/39995
1894 [40008]: https://github.com/rust-lang/rust/pull/40008
1895 [40009]: https://github.com/rust-lang/rust/pull/40009
1896 [40027]: https://github.com/rust-lang/rust/pull/40027
1897 [40028]: https://github.com/rust-lang/rust/pull/40028
1898 [40037]: https://github.com/rust-lang/rust/pull/40037
1899 [40117]: https://github.com/rust-lang/rust/pull/40117
1900 [40166]: https://github.com/rust-lang/rust/pull/40166
1901 [40245]: https://github.com/rust-lang/rust/pull/40245
1902 [40257]: https://github.com/rust-lang/rust/pull/40257
1903 [40261]: https://github.com/rust-lang/rust/pull/40261
1904 [40265]: https://github.com/rust-lang/rust/pull/40265
1905 [40319]: https://github.com/rust-lang/rust/pull/40319
1906 [40336]: https://github.com/rust-lang/rust/pull/40336
1907 [40526]: https://github.com/rust-lang/rust/pull/40526
1908 [RFC 1623]: https://github.com/rust-lang/rfcs/blob/master/text/1623-static.md
1909 [RFC 1647]: https://github.com/rust-lang/rfcs/blob/master/text/1647-allow-self-in-where-clauses.md
1910 [RFC 1651]: https://github.com/rust-lang/rfcs/blob/master/text/1651-movecell.md
1911 [RFC 1682]: https://github.com/rust-lang/rfcs/blob/master/text/1682-field-init-shorthand.md
1912 [`Arc::from_raw`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.from_raw
1913 [`Arc::into_raw`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.into_raw
1914 [`Arc::ptr_eq`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.ptr_eq
1915 [`BTreeMap::range_mut`]: https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.range_mut
1916 [`BTreeMap::range`]: https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.range
1917 [`Cell::into_inner`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.into_inner
1918 [`Cell::replace`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.replace
1919 [`Cell::swap`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.swap
1920 [`Cell::take`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.take
1921 [`Ordering::then_with`]: https://doc.rust-lang.org/std/cmp/enum.Ordering.html#method.then_with
1922 [`Ordering::then`]: https://doc.rust-lang.org/std/cmp/enum.Ordering.html#method.then
1923 [`Rc::from_raw`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.from_raw
1924 [`Rc::into_raw`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.into_raw
1925 [`Rc::ptr_eq`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.ptr_eq
1926 [`Result::expect_err`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.expect_err
1927 [`collections::Bound`]: https://doc.rust-lang.org/std/collections/enum.Bound.html
1928 [`process::abort`]: https://doc.rust-lang.org/std/process/fn.abort.html
1929 [`ptr::read_unaligned`]: https://doc.rust-lang.org/std/ptr/fn.read_unaligned.html
1930 [`ptr::write_unaligned`]: https://doc.rust-lang.org/std/ptr/fn.write_unaligned.html
1931 [cargo/3562]: https://github.com/rust-lang/cargo/pull/3562
1932 [cargo/3664]: https://github.com/rust-lang/cargo/pull/3664
1933 [cargo/3667]: https://github.com/rust-lang/cargo/pull/3667
1934 [cargo/3691]: https://github.com/rust-lang/cargo/pull/3691
1935 [cargo/3699]: https://github.com/rust-lang/cargo/pull/3699
1936 [cargo/3731]: https://github.com/rust-lang/cargo/pull/3731
1937 [mdbook]: https://crates.io/crates/mdbook
1938 [ubook]: https://doc.rust-lang.org/unstable-book/
1941 Version 1.16.0 (2017-03-16)
1942 ===========================
1947 * [The compiler's `dead_code` lint now accounts for type aliases][38051].
1948 * [Uninhabitable enums (those without any variants) no longer permit wildcard
1949 match patterns][38069]
1950 * [Clean up semantics of `self` in an import list][38313]
1951 * [`Self` may appear in `impl` headers][38920]
1952 * [`Self` may appear in struct expressions][39282]
1957 * [`rustc` now supports `--emit=metadata`, which causes rustc to emit
1958 a `.rmeta` file containing only crate metadata][38571]. This can be
1959 used by tools like the Rust Language Service to perform
1960 metadata-only builds.
1961 * [Levenshtein based typo suggestions now work in most places, while
1962 previously they worked only for fields and sometimes for local
1963 variables][38927]. Together with the overhaul of "no
1964 resolution"/"unexpected resolution" errors (#[38154]) they result in
1965 large and systematic improvement in resolution diagnostics.
1966 * [Fix `transmute::<T, U>` where `T` requires a bigger alignment than
1968 * [rustc: use -Xlinker when specifying an rpath with ',' in it][38798]
1969 * [`rustc` no longer attempts to provide "consider using an explicit
1970 lifetime" suggestions][37057]. They were inaccurate.
1975 * [`VecDeque::truncate`]
1976 * [`VecDeque::resize`]
1977 * [`String::insert_str`]
1978 * [`Duration::checked_add`]
1979 * [`Duration::checked_sub`]
1980 * [`Duration::checked_div`]
1981 * [`Duration::checked_mul`]
1984 * [`SocketAddr::is_ipv4`]
1985 * [`SocketAddr::is_ipv6`]
1986 * [`IpAddr::is_ipv4`]
1987 * [`IpAddr::is_ipv6`]
1989 * [`Vec::dedup_by_key`]
1990 * [`Result::unwrap_or_default`]
1991 * [`<*const T>::wrapping_offset`]
1992 * [`<*mut T>::wrapping_offset`]
1993 * `CommandExt::creation_flags`
1994 * [`File::set_permissions`]
1995 * [`String::split_off`]
2000 * [`[T]::binary_search` and `[T]::binary_search_by_key` now take
2001 their argument by `Borrow` parameter][37761]
2002 * [All public types in std implement `Debug`][38006]
2003 * [`IpAddr` implements `From<Ipv4Addr>` and `From<Ipv6Addr>`][38327]
2004 * [`Ipv6Addr` implements `From<[u16; 8]>`][38131]
2005 * [Ctrl-Z returns from `Stdin.read()` when reading from the console on
2007 * [std: Fix partial writes in `LineWriter`][38062]
2008 * [std: Clamp max read/write sizes on Unix][38062]
2009 * [Use more specific panic message for `&str` slicing errors][38066]
2010 * [`TcpListener::set_only_v6` is deprecated][38304]. This
2011 functionality cannot be achieved in std currently.
2012 * [`writeln!`, like `println!`, now accepts a form with no string
2013 or formatting arguments, to just print a newline][38469]
2014 * [Implement `iter::Sum` and `iter::Product` for `Result`][38580]
2015 * [Reduce the size of static data in `std_unicode::tables`][38781]
2016 * [`char::EscapeDebug`, `EscapeDefault`, `EscapeUnicode`,
2017 `CaseMappingIter`, `ToLowercase`, `ToUppercase`, implement
2019 * [`Duration` implements `Sum`][38712]
2020 * [`String` implements `ToSocketAddrs`][39048]
2025 * [The `cargo check` command does a type check of a project without
2026 building it][cargo/3296]
2027 * [crates.io will display CI badges from Travis and AppVeyor, if
2028 specified in Cargo.toml][cargo/3546]
2029 * [crates.io will display categories listed in Cargo.toml][cargo/3301]
2030 * [Compilation profiles accept integer values for `debug`, in addition
2031 to `true` and `false`. These are passed to `rustc` as the value to
2032 `-C debuginfo`][cargo/3534]
2033 * [Implement `cargo --version --verbose`][cargo/3604]
2034 * [All builds now output 'dep-info' build dependencies compatible with
2035 make and ninja][cargo/3557]
2036 * [Build all workspace members with `build --all`][cargo/3511]
2037 * [Document all workspace members with `doc --all`][cargo/3515]
2038 * [Path deps outside workspace are not members][cargo/3443]
2043 * [`rustdoc` has a `--sysroot` argument that, like `rustc`, specifies
2044 the path to the Rust implementation][38589]
2045 * [The `armv7-linux-androideabi` target no longer enables NEON
2046 extensions, per Google's ABI guide][38413]
2047 * [The stock standard library can be compiled for Redox OS][38401]
2048 * [Rust has initial SPARC support][38726]. Tier 3. No builds
2050 * [Rust has experimental support for Nvidia PTX][38559]. Tier 3. No
2052 * [Fix backtraces on i686-pc-windows-gnu by disabling FPO][39379]
2057 * [Uninhabitable enums (those without any variants) no longer permit wildcard
2058 match patterns][38069]
2059 * In this release, references to uninhabited types can not be
2060 pattern-matched. This was accidentally allowed in 1.15.
2061 * [The compiler's `dead_code` lint now accounts for type aliases][38051].
2062 * [Ctrl-Z returns from `Stdin.read()` when reading from the console on
2064 * [Clean up semantics of `self` in an import list][38313]
2065 * Reimplemented lifetime elision. This change was almost entirely compatible
2066 with existing code, but it did close a number of small bugs and loopholes,
2067 as well as being more accepting in some other [cases][41105].
2069 [37057]: https://github.com/rust-lang/rust/pull/37057
2070 [37761]: https://github.com/rust-lang/rust/pull/37761
2071 [38006]: https://github.com/rust-lang/rust/pull/38006
2072 [38051]: https://github.com/rust-lang/rust/pull/38051
2073 [38062]: https://github.com/rust-lang/rust/pull/38062
2074 [38062]: https://github.com/rust-lang/rust/pull/38622
2075 [38066]: https://github.com/rust-lang/rust/pull/38066
2076 [38069]: https://github.com/rust-lang/rust/pull/38069
2077 [38131]: https://github.com/rust-lang/rust/pull/38131
2078 [38154]: https://github.com/rust-lang/rust/pull/38154
2079 [38274]: https://github.com/rust-lang/rust/pull/38274
2080 [38304]: https://github.com/rust-lang/rust/pull/38304
2081 [38313]: https://github.com/rust-lang/rust/pull/38313
2082 [38314]: https://github.com/rust-lang/rust/pull/38314
2083 [38327]: https://github.com/rust-lang/rust/pull/38327
2084 [38401]: https://github.com/rust-lang/rust/pull/38401
2085 [38413]: https://github.com/rust-lang/rust/pull/38413
2086 [38469]: https://github.com/rust-lang/rust/pull/38469
2087 [38559]: https://github.com/rust-lang/rust/pull/38559
2088 [38571]: https://github.com/rust-lang/rust/pull/38571
2089 [38580]: https://github.com/rust-lang/rust/pull/38580
2090 [38589]: https://github.com/rust-lang/rust/pull/38589
2091 [38670]: https://github.com/rust-lang/rust/pull/38670
2092 [38712]: https://github.com/rust-lang/rust/pull/38712
2093 [38726]: https://github.com/rust-lang/rust/pull/38726
2094 [38781]: https://github.com/rust-lang/rust/pull/38781
2095 [38798]: https://github.com/rust-lang/rust/pull/38798
2096 [38909]: https://github.com/rust-lang/rust/pull/38909
2097 [38920]: https://github.com/rust-lang/rust/pull/38920
2098 [38927]: https://github.com/rust-lang/rust/pull/38927
2099 [39048]: https://github.com/rust-lang/rust/pull/39048
2100 [39282]: https://github.com/rust-lang/rust/pull/39282
2101 [39379]: https://github.com/rust-lang/rust/pull/39379
2102 [41105]: https://github.com/rust-lang/rust/issues/41105
2103 [`<*const T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset
2104 [`<*mut T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset
2105 [`Duration::checked_add`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_add
2106 [`Duration::checked_div`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_div
2107 [`Duration::checked_mul`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_mul
2108 [`Duration::checked_sub`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_sub
2109 [`File::set_permissions`]: https://doc.rust-lang.org/std/fs/struct.File.html#method.set_permissions
2110 [`IpAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv4
2111 [`IpAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv6
2112 [`Result::unwrap_or_default`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.unwrap_or_default
2113 [`SocketAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv4
2114 [`SocketAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv6
2115 [`String::insert_str`]: https://doc.rust-lang.org/std/string/struct.String.html#method.insert_str
2116 [`String::split_off`]: https://doc.rust-lang.org/std/string/struct.String.html#method.split_off
2117 [`Vec::dedup_by_key`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by_key
2118 [`Vec::dedup_by`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by
2119 [`VecDeque::resize`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.resize
2120 [`VecDeque::truncate`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.truncate
2121 [`str::repeat`]: https://doc.rust-lang.org/std/primitive.str.html#method.repeat
2122 [`str::replacen`]: https://doc.rust-lang.org/std/primitive.str.html#method.replacen
2123 [cargo/3296]: https://github.com/rust-lang/cargo/pull/3296
2124 [cargo/3301]: https://github.com/rust-lang/cargo/pull/3301
2125 [cargo/3443]: https://github.com/rust-lang/cargo/pull/3443
2126 [cargo/3511]: https://github.com/rust-lang/cargo/pull/3511
2127 [cargo/3515]: https://github.com/rust-lang/cargo/pull/3515
2128 [cargo/3534]: https://github.com/rust-lang/cargo/pull/3534
2129 [cargo/3546]: https://github.com/rust-lang/cargo/pull/3546
2130 [cargo/3557]: https://github.com/rust-lang/cargo/pull/3557
2131 [cargo/3604]: https://github.com/rust-lang/cargo/pull/3604
2132 [RFC 1623]: https://github.com/rust-lang/rfcs/blob/master/text/1623-static.md
2135 Version 1.15.1 (2017-02-09)
2136 ===========================
2138 * [Fix IntoIter::as_mut_slice's signature][39466]
2139 * [Compile compiler builtins with `-fPIC` on 32-bit platforms][39523]
2141 [39466]: https://github.com/rust-lang/rust/pull/39466
2142 [39523]: https://github.com/rust-lang/rust/pull/39523
2145 Version 1.15.0 (2017-02-02)
2146 ===========================
2151 * Basic procedural macros allowing custom `#[derive]`, aka "macros 1.1", are
2152 stable. This allows popular code-generating crates like Serde and Diesel to
2153 work ergonomically. [RFC 1681].
2154 * [Tuple structs may be empty. Unary and empty tuple structs may be instantiated
2155 with curly braces][36868]. Part of [RFC 1506].
2156 * [A number of minor changes to name resolution have been activated][37127].
2157 They add up to more consistent semantics, allowing for future evolution of
2158 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
2159 details of what is different. The breaking changes here have been transitioned
2160 through the [`legacy_imports`] lint since 1.14, with no known regressions.
2161 * [In `macro_rules`, `path` fragments can now be parsed as type parameter
2163 * [`?Sized` can be used in `where` clauses][37791]
2164 * [There is now a limit on the size of monomorphized types and it can be
2165 modified with the `#![type_size_limit]` crate attribute, similarly to
2166 the `#![recursion_limit]` attribute][37789]
2171 * [On Windows, the compiler will apply dllimport attributes when linking to
2172 extern functions][37973]. Additional attributes and flags can control which
2173 library kind is linked and its name. [RFC 1717].
2174 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
2175 * [The `--test` flag works with procedural macro crates][38107]
2176 * [Fix `extern "aapcs" fn` ABI][37814]
2177 * [The `-C no-stack-check` flag is deprecated][37636]. It does nothing.
2178 * [The `format!` expander recognizes incorrect `printf` and shell-style
2179 formatting directives and suggests the correct format][37613].
2180 * [Only report one error for all unused imports in an import list][37456]
2182 Compiler Performance
2183 --------------------
2185 * [Avoid unnecessary `mk_ty` calls in `Ty::super_fold_with`][37705]
2186 * [Avoid more unnecessary `mk_ty` calls in `Ty::super_fold_with`][37979]
2187 * [Don't clone in `UnificationTable::probe`][37848]
2188 * [Remove `scope_auxiliary` to cut RSS by 10%][37764]
2189 * [Use small vectors in type walker][37760]
2190 * [Macro expansion performance was improved][37701]
2191 * [Change `HirVec<P<T>>` to `HirVec<T>` in `hir::Expr`][37642]
2192 * [Replace FNV with a faster hash function][37229]
2197 * [`std::iter::Iterator::min_by`]
2198 * [`std::iter::Iterator::max_by`]
2199 * [`std::os::*::fs::FileExt`]
2200 * [`std::sync::atomic::Atomic*::get_mut`]
2201 * [`std::sync::atomic::Atomic*::into_inner`]
2202 * [`std::vec::IntoIter::as_slice`]
2203 * [`std::vec::IntoIter::as_mut_slice`]
2204 * [`std::sync::mpsc::Receiver::try_iter`]
2205 * [`std::os::unix::process::CommandExt::before_exec`]
2206 * [`std::rc::Rc::strong_count`]
2207 * [`std::rc::Rc::weak_count`]
2208 * [`std::sync::Arc::strong_count`]
2209 * [`std::sync::Arc::weak_count`]
2210 * [`std::char::encode_utf8`]
2211 * [`std::char::encode_utf16`]
2212 * [`std::cell::Ref::clone`]
2213 * [`std::io::Take::into_inner`]
2218 * [The standard sorting algorithm has been rewritten for dramatic performance
2219 improvements][38192]. It is a hybrid merge sort, drawing influences from
2220 Timsort. Previously it was a naive merge sort.
2221 * [`Iterator::nth` no longer has a `Sized` bound][38134]
2222 * [`Extend<&T>` is specialized for `Vec` where `T: Copy`][38182] to improve
2224 * [`chars().count()` is much faster][37888] and so are [`chars().last()`
2225 and `char_indices().last()`][37882]
2226 * [Fix ARM Objective-C ABI in `std::env::args`][38146]
2227 * [Chinese characters display correctly in `fmt::Debug`][37855]
2228 * [Derive `Default` for `Duration`][37699]
2229 * [Support creation of anonymous pipes on WinXP/2k][37677]
2230 * [`mpsc::RecvTimeoutError` implements `Error`][37527]
2231 * [Don't pass overlapped handles to processes][38835]
2236 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
2237 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
2238 should instead check the variable at runtime with `std::env`. That the value
2239 was set at build time was a bug, and incorrect when cross-compiling. This
2240 change is known to cause breakage.
2241 * [Add `--all` flag to `cargo test`][cargo/3221]
2242 * [Compile statically against the MSVC CRT][cargo/3363]
2243 * [Mix feature flags into fingerprint/metadata shorthash][cargo/3102]
2244 * [Link OpenSSL statically on OSX][cargo/3311]
2245 * [Apply new fingerprinting to build dir outputs][cargo/3310]
2246 * [Test for bad path overrides with summaries][cargo/3336]
2247 * [Require `cargo install --vers` to take a semver version][cargo/3338]
2248 * [Fix retrying crate downloads for network errors][cargo/3348]
2249 * [Implement string lookup for `build.rustflags` config key][cargo/3356]
2250 * [Emit more info on --message-format=json][cargo/3319]
2251 * [Assume `build.rs` in the same directory as `Cargo.toml` is a build script][cargo/3361]
2252 * [Don't ignore errors in workspace manifest][cargo/3409]
2253 * [Fix `--message-format JSON` when rustc emits non-JSON warnings][cargo/3410]
2258 * [Test runners (binaries built with `--test`) now support a `--list` argument
2259 that lists the tests it contains][38185]
2260 * [Test runners now support a `--exact` argument that makes the test filter
2261 match exactly, instead of matching only a substring of the test name][38181]
2262 * [rustdoc supports a `--playground-url` flag][37763]
2263 * [rustdoc provides more details about `#[should_panic]` errors][37749]
2268 * [The Rust build system is now written in Rust][37817]. The Makefiles may
2269 continue to be used in this release by passing `--disable-rustbuild` to the
2270 configure script, but they will be deleted soon. Note that the new build
2271 system uses a different on-disk layout that will likely affect any scripts
2273 * [Rust supports i686-unknown-openbsd][38086]. Tier 3 support. No testing or
2275 * [Rust supports the MSP430][37627]. Tier 3 support. No testing or releases.
2276 * [Rust supports the ARMv5TE architecture][37615]. Tier 3 support. No testing or
2282 * [A number of minor changes to name resolution have been activated][37127].
2283 They add up to more consistent semantics, allowing for future evolution of
2284 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
2285 details of what is different. The breaking changes here have been transitioned
2286 through the [`legacy_imports`] lint since 1.14, with no known regressions.
2287 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
2288 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
2289 should instead check the variable at runtime with `std::env`. That the value
2290 was set at build time was a bug, and incorrect when cross-compiling. This
2291 change is known to cause breakage.
2292 * [Higher-ranked lifetimes are no longer allowed to appear _only_ in associated
2293 types][33685]. The [`hr_lifetime_in_assoc_type` lint] has been a warning since
2294 1.10 and is now an error by default. It will become a hard error in the near
2296 * [The semantics relating modules to file system directories are changing in
2297 minor ways][37602]. This is captured in the new `legacy_directory_ownership`
2298 lint, which is a warning in this release, and will become a hard error in the
2300 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
2301 * [Once `Peekable` peeks a `None` it will return that `None` without re-querying
2302 the underlying iterator][37834]
2304 ["changes"]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md#changes-to-name-resolution-rules
2305 [33685]: https://github.com/rust-lang/rust/issues/33685
2306 [36868]: https://github.com/rust-lang/rust/pull/36868
2307 [37127]: https://github.com/rust-lang/rust/pull/37127
2308 [37229]: https://github.com/rust-lang/rust/pull/37229
2309 [37456]: https://github.com/rust-lang/rust/pull/37456
2310 [37527]: https://github.com/rust-lang/rust/pull/37527
2311 [37602]: https://github.com/rust-lang/rust/pull/37602
2312 [37613]: https://github.com/rust-lang/rust/pull/37613
2313 [37615]: https://github.com/rust-lang/rust/pull/37615
2314 [37636]: https://github.com/rust-lang/rust/pull/37636
2315 [37627]: https://github.com/rust-lang/rust/pull/37627
2316 [37642]: https://github.com/rust-lang/rust/pull/37642
2317 [37677]: https://github.com/rust-lang/rust/pull/37677
2318 [37699]: https://github.com/rust-lang/rust/pull/37699
2319 [37701]: https://github.com/rust-lang/rust/pull/37701
2320 [37705]: https://github.com/rust-lang/rust/pull/37705
2321 [37749]: https://github.com/rust-lang/rust/pull/37749
2322 [37760]: https://github.com/rust-lang/rust/pull/37760
2323 [37763]: https://github.com/rust-lang/rust/pull/37763
2324 [37764]: https://github.com/rust-lang/rust/pull/37764
2325 [37789]: https://github.com/rust-lang/rust/pull/37789
2326 [37791]: https://github.com/rust-lang/rust/pull/37791
2327 [37814]: https://github.com/rust-lang/rust/pull/37814
2328 [37817]: https://github.com/rust-lang/rust/pull/37817
2329 [37834]: https://github.com/rust-lang/rust/pull/37834
2330 [37848]: https://github.com/rust-lang/rust/pull/37848
2331 [37855]: https://github.com/rust-lang/rust/pull/37855
2332 [37882]: https://github.com/rust-lang/rust/pull/37882
2333 [37888]: https://github.com/rust-lang/rust/pull/37888
2334 [37973]: https://github.com/rust-lang/rust/pull/37973
2335 [37979]: https://github.com/rust-lang/rust/pull/37979
2336 [38086]: https://github.com/rust-lang/rust/pull/38086
2337 [38107]: https://github.com/rust-lang/rust/pull/38107
2338 [38117]: https://github.com/rust-lang/rust/pull/38117
2339 [38134]: https://github.com/rust-lang/rust/pull/38134
2340 [38146]: https://github.com/rust-lang/rust/pull/38146
2341 [38181]: https://github.com/rust-lang/rust/pull/38181
2342 [38182]: https://github.com/rust-lang/rust/pull/38182
2343 [38185]: https://github.com/rust-lang/rust/pull/38185
2344 [38192]: https://github.com/rust-lang/rust/pull/38192
2345 [38279]: https://github.com/rust-lang/rust/pull/38279
2346 [38835]: https://github.com/rust-lang/rust/pull/38835
2347 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
2348 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
2349 [RFC 1560]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md
2350 [RFC 1681]: https://github.com/rust-lang/rfcs/blob/master/text/1681-macros-1.1.md
2351 [RFC 1717]: https://github.com/rust-lang/rfcs/blob/master/text/1717-dllimport.md
2352 [`hr_lifetime_in_assoc_type` lint]: https://github.com/rust-lang/rust/issues/33685
2353 [`legacy_imports`]: https://github.com/rust-lang/rust/pull/38271
2354 [cargo/3102]: https://github.com/rust-lang/cargo/pull/3102
2355 [cargo/3221]: https://github.com/rust-lang/cargo/pull/3221
2356 [cargo/3310]: https://github.com/rust-lang/cargo/pull/3310
2357 [cargo/3311]: https://github.com/rust-lang/cargo/pull/3311
2358 [cargo/3319]: https://github.com/rust-lang/cargo/pull/3319
2359 [cargo/3336]: https://github.com/rust-lang/cargo/pull/3336
2360 [cargo/3338]: https://github.com/rust-lang/cargo/pull/3338
2361 [cargo/3348]: https://github.com/rust-lang/cargo/pull/3348
2362 [cargo/3356]: https://github.com/rust-lang/cargo/pull/3356
2363 [cargo/3361]: https://github.com/rust-lang/cargo/pull/3361
2364 [cargo/3363]: https://github.com/rust-lang/cargo/pull/3363
2365 [cargo/3368]: https://github.com/rust-lang/cargo/issues/3368
2366 [cargo/3409]: https://github.com/rust-lang/cargo/pull/3409
2367 [cargo/3410]: https://github.com/rust-lang/cargo/pull/3410
2368 [`std::iter::Iterator::min_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.min_by
2369 [`std::iter::Iterator::max_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.max_by
2370 [`std::os::*::fs::FileExt`]: https://doc.rust-lang.org/std/os/unix/fs/trait.FileExt.html
2371 [`std::sync::atomic::Atomic*::get_mut`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.get_mut
2372 [`std::sync::atomic::Atomic*::into_inner`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.into_inner
2373 [`std::vec::IntoIter::as_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_slice
2374 [`std::vec::IntoIter::as_mut_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_mut_slice
2375 [`std::sync::mpsc::Receiver::try_iter`]: https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.try_iter
2376 [`std::os::unix::process::CommandExt::before_exec`]: https://doc.rust-lang.org/std/os/unix/process/trait.CommandExt.html#tymethod.before_exec
2377 [`std::rc::Rc::strong_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.strong_count
2378 [`std::rc::Rc::weak_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.weak_count
2379 [`std::sync::Arc::strong_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.strong_count
2380 [`std::sync::Arc::weak_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.weak_count
2381 [`std::char::encode_utf8`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf8
2382 [`std::char::encode_utf16`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf16
2383 [`std::cell::Ref::clone`]: https://doc.rust-lang.org/std/cell/struct.Ref.html#method.clone
2384 [`std::io::Take::into_inner`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.into_inner
2387 Version 1.14.0 (2016-12-22)
2388 ===========================
2393 * [`..` matches multiple tuple fields in enum variants, structs
2394 and tuples][36843]. [RFC 1492].
2395 * [Safe `fn` items can be coerced to `unsafe fn` pointers][37389]
2396 * [`use *` and `use ::*` both glob-import from the crate root][37367]
2397 * [It's now possible to call a `Vec<Box<Fn()>>` without explicit
2398 dereferencing][36822]
2403 * [Mark enums with non-zero discriminant as non-zero][37224]
2404 * [Lower-case `static mut` names are linted like other
2405 statics and consts][37162]
2406 * [Fix ICE on some macros in const integer positions
2407 (e.g. `[u8; m!()]`)][36819]
2408 * [Improve error message and snippet for "did you mean `x`"][36798]
2409 * [Add a panic-strategy field to the target specification][36794]
2410 * [Include LLVM version in `--version --verbose`][37200]
2412 Compile-time Optimizations
2413 --------------------------
2415 * [Improve macro expansion performance][37569]
2416 * [Shrink `Expr_::ExprInlineAsm`][37445]
2417 * [Replace all uses of SHA-256 with BLAKE2b][37439]
2418 * [Reduce the number of bytes hashed by `IchHasher`][37427]
2419 * [Avoid more allocations when compiling html5ever][37373]
2420 * [Use `SmallVector` in `CombineFields::instantiate`][37322]
2421 * [Avoid some allocations in the macro parser][37318]
2422 * [Use a faster deflate setting][37298]
2423 * [Add `ArrayVec` and `AccumulateVec` to reduce heap allocations
2424 during interning of slices][37270]
2425 * [Optimize `write_metadata`][37267]
2426 * [Don't process obligation forest cycles when stalled][37231]
2427 * [Avoid many `CrateConfig` clones][37161]
2428 * [Optimize `Substs::super_fold_with`][37108]
2429 * [Optimize `ObligationForest`'s `NodeState` handling][36993]
2430 * [Speed up `plug_leaks`][36917]
2435 * [`println!()`, with no arguments, prints newline][36825].
2436 Previously, an empty string was required to achieve the same.
2437 * [`Wrapping` impls standard binary and unary operators, as well as
2438 the `Sum` and `Product` iterators][37356]
2439 * [Implement `From<Cow<str>> for String` and `From<Cow<[T]>> for
2441 * [Improve `fold` performance for `chain`, `cloned`, `map`, and
2442 `VecDeque` iterators][37315]
2443 * [Improve `SipHasher` performance on small values][37312]
2444 * [Add Iterator trait TrustedLen to enable better FromIterator /
2446 * [Expand `.zip()` specialization to `.map()` and `.cloned()`][37230]
2447 * [`ReadDir` implements `Debug`][37221]
2448 * [Implement `RefUnwindSafe` for atomic types][37178]
2449 * [Specialize `Vec::extend` to `Vec::extend_from_slice`][37094]
2450 * [Avoid allocations in `Decoder::read_str`][37064]
2451 * [`io::Error` implements `From<io::ErrorKind>`][37037]
2452 * [Impl `Debug` for raw pointers to unsized data][36880]
2453 * [Don't reuse `HashMap` random seeds][37470]
2454 * [The internal memory layout of `HashMap` is more cache-friendly, for
2455 significant improvements in some operations][36692]
2456 * [`HashMap` uses less memory on 32-bit architectures][36595]
2457 * [Impl `Add<{str, Cow<str>}>` for `Cow<str>`][36430]
2462 * [Expose rustc cfg values to build scripts][cargo/3243]
2463 * [Allow cargo to work with read-only `CARGO_HOME`][cargo/3259]
2464 * [Fix passing --features when testing multiple packages][cargo/3280]
2465 * [Use a single profile set per workspace][cargo/3249]
2466 * [Load `replace` sections from lock files][cargo/3220]
2467 * [Ignore `panic` configuration for test/bench profiles][cargo/3175]
2472 * [rustup is the recommended Rust installation method][1.14rustup]
2473 * This release includes host (rustc) builds for Linux on MIPS, PowerPC, and
2474 S390x. These are [tier 2] platforms and may have major defects. Follow the
2475 instructions on the website to install, or add the targets to an existing
2476 installation with `rustup target add`. The new target triples are:
2477 - `mips-unknown-linux-gnu`
2478 - `mipsel-unknown-linux-gnu`
2479 - `mips64-unknown-linux-gnuabi64`
2480 - `mips64el-unknown-linux-gnuabi64 `
2481 - `powerpc-unknown-linux-gnu`
2482 - `powerpc64-unknown-linux-gnu`
2483 - `powerpc64le-unknown-linux-gnu`
2484 - `s390x-unknown-linux-gnu `
2485 * This release includes target (std) builds for ARM Linux running MUSL
2486 libc. These are [tier 2] platforms and may have major defects. Add the
2487 following triples to an existing rustup installation with `rustup target add`:
2488 - `arm-unknown-linux-musleabi`
2489 - `arm-unknown-linux-musleabihf`
2490 - `armv7-unknown-linux-musleabihf`
2491 * This release includes [experimental support for WebAssembly][1.14wasm], via
2492 the `wasm32-unknown-emscripten` target. This target is known to have major
2493 defects. Please test, report, and fix.
2494 * rustup no longer installs documentation by default. Run `rustup
2495 component add rust-docs` to install.
2496 * [Fix line stepping in debugger][37310]
2497 * [Enable line number debuginfo in releases][37280]
2502 * [Disable jemalloc on aarch64/powerpc/mips][37392]
2503 * [Add support for Fuchsia OS][37313]
2504 * [Detect local-rebuild by only MAJOR.MINOR version][37273]
2509 * [A number of forward-compatibility lints used by the compiler
2510 to gradually introduce language changes have been converted
2511 to deny by default][36894]:
2512 - ["use of inaccessible extern crate erroneously allowed"][36886]
2513 - ["type parameter default erroneously allowed in invalid location"][36887]
2514 - ["detects super or self keywords at the beginning of global path"][36888]
2515 - ["two overlapping inherent impls define an item with the same name
2516 were erroneously allowed"][36889]
2517 - ["floating-point constants cannot be used in patterns"][36890]
2518 - ["constants of struct or enum type can only be used in a pattern if
2519 the struct or enum has `#[derive(PartialEq, Eq)]`"][36891]
2520 - ["lifetimes or labels named `'_` were erroneously allowed"][36892]
2521 * [Prohibit patterns in trait methods without bodies][37378]
2522 * [The atomic `Ordering` enum may not be matched exhaustively][37351]
2523 * [Future-proofing `#[no_link]` breaks some obscure cases][37247]
2524 * [The `$crate` macro variable is accepted in fewer locations][37213]
2525 * [Impls specifying extra region requirements beyond the trait
2526 they implement are rejected][37167]
2527 * [Enums may not be unsized][37111]. Unsized enums are intended to
2528 work but never have. For now they are forbidden.
2529 * [Enforce the shadowing restrictions from RFC 1560 for today's macros][36767]
2531 [tier 2]: https://forge.rust-lang.org/platform-support.html
2532 [1.14rustup]: https://internals.rust-lang.org/t/beta-testing-rustup-rs/3316/204
2533 [1.14wasm]: https://users.rust-lang.org/t/compiling-to-the-web-with-rust-and-emscripten/7627
2534 [36430]: https://github.com/rust-lang/rust/pull/36430
2535 [36595]: https://github.com/rust-lang/rust/pull/36595
2536 [36595]: https://github.com/rust-lang/rust/pull/36595
2537 [36692]: https://github.com/rust-lang/rust/pull/36692
2538 [36767]: https://github.com/rust-lang/rust/pull/36767
2539 [36794]: https://github.com/rust-lang/rust/pull/36794
2540 [36798]: https://github.com/rust-lang/rust/pull/36798
2541 [36819]: https://github.com/rust-lang/rust/pull/36819
2542 [36822]: https://github.com/rust-lang/rust/pull/36822
2543 [36825]: https://github.com/rust-lang/rust/pull/36825
2544 [36843]: https://github.com/rust-lang/rust/pull/36843
2545 [36880]: https://github.com/rust-lang/rust/pull/36880
2546 [36886]: https://github.com/rust-lang/rust/issues/36886
2547 [36887]: https://github.com/rust-lang/rust/issues/36887
2548 [36888]: https://github.com/rust-lang/rust/issues/36888
2549 [36889]: https://github.com/rust-lang/rust/issues/36889
2550 [36890]: https://github.com/rust-lang/rust/issues/36890
2551 [36891]: https://github.com/rust-lang/rust/issues/36891
2552 [36892]: https://github.com/rust-lang/rust/issues/36892
2553 [36894]: https://github.com/rust-lang/rust/pull/36894
2554 [36917]: https://github.com/rust-lang/rust/pull/36917
2555 [36993]: https://github.com/rust-lang/rust/pull/36993
2556 [37037]: https://github.com/rust-lang/rust/pull/37037
2557 [37064]: https://github.com/rust-lang/rust/pull/37064
2558 [37094]: https://github.com/rust-lang/rust/pull/37094
2559 [37108]: https://github.com/rust-lang/rust/pull/37108
2560 [37111]: https://github.com/rust-lang/rust/pull/37111
2561 [37161]: https://github.com/rust-lang/rust/pull/37161
2562 [37162]: https://github.com/rust-lang/rust/pull/37162
2563 [37167]: https://github.com/rust-lang/rust/pull/37167
2564 [37178]: https://github.com/rust-lang/rust/pull/37178
2565 [37200]: https://github.com/rust-lang/rust/pull/37200
2566 [37213]: https://github.com/rust-lang/rust/pull/37213
2567 [37221]: https://github.com/rust-lang/rust/pull/37221
2568 [37224]: https://github.com/rust-lang/rust/pull/37224
2569 [37230]: https://github.com/rust-lang/rust/pull/37230
2570 [37231]: https://github.com/rust-lang/rust/pull/37231
2571 [37247]: https://github.com/rust-lang/rust/pull/37247
2572 [37267]: https://github.com/rust-lang/rust/pull/37267
2573 [37270]: https://github.com/rust-lang/rust/pull/37270
2574 [37273]: https://github.com/rust-lang/rust/pull/37273
2575 [37280]: https://github.com/rust-lang/rust/pull/37280
2576 [37298]: https://github.com/rust-lang/rust/pull/37298
2577 [37306]: https://github.com/rust-lang/rust/pull/37306
2578 [37310]: https://github.com/rust-lang/rust/pull/37310
2579 [37312]: https://github.com/rust-lang/rust/pull/37312
2580 [37313]: https://github.com/rust-lang/rust/pull/37313
2581 [37315]: https://github.com/rust-lang/rust/pull/37315
2582 [37318]: https://github.com/rust-lang/rust/pull/37318
2583 [37322]: https://github.com/rust-lang/rust/pull/37322
2584 [37326]: https://github.com/rust-lang/rust/pull/37326
2585 [37351]: https://github.com/rust-lang/rust/pull/37351
2586 [37356]: https://github.com/rust-lang/rust/pull/37356
2587 [37367]: https://github.com/rust-lang/rust/pull/37367
2588 [37373]: https://github.com/rust-lang/rust/pull/37373
2589 [37378]: https://github.com/rust-lang/rust/pull/37378
2590 [37389]: https://github.com/rust-lang/rust/pull/37389
2591 [37392]: https://github.com/rust-lang/rust/pull/37392
2592 [37427]: https://github.com/rust-lang/rust/pull/37427
2593 [37439]: https://github.com/rust-lang/rust/pull/37439
2594 [37445]: https://github.com/rust-lang/rust/pull/37445
2595 [37470]: https://github.com/rust-lang/rust/pull/37470
2596 [37569]: https://github.com/rust-lang/rust/pull/37569
2597 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
2598 [cargo/3175]: https://github.com/rust-lang/cargo/pull/3175
2599 [cargo/3220]: https://github.com/rust-lang/cargo/pull/3220
2600 [cargo/3243]: https://github.com/rust-lang/cargo/pull/3243
2601 [cargo/3249]: https://github.com/rust-lang/cargo/pull/3249
2602 [cargo/3259]: https://github.com/rust-lang/cargo/pull/3259
2603 [cargo/3280]: https://github.com/rust-lang/cargo/pull/3280
2606 Version 1.13.0 (2016-11-10)
2607 ===========================
2612 * [Stabilize the `?` operator][36995]. `?` is a simple way to propagate
2613 errors, like the `try!` macro, described in [RFC 0243].
2614 * [Stabilize macros in type position][36014]. Described in [RFC 873].
2615 * [Stabilize attributes on statements][36995]. Described in [RFC 0016].
2616 * [Fix `#[derive]` for empty tuple structs/variants][35728]
2617 * [Fix lifetime rules for 'if' conditions][36029]
2618 * [Avoid loading and parsing unconfigured non-inline modules][36482]
2623 * [Add the `-C link-arg` argument][36574]
2624 * [Remove the old AST-based backend from rustc_trans][35764]
2625 * [Don't enable NEON by default on armv7 Linux][35814]
2626 * [Fix debug line number info for macro expansions][35238]
2627 * [Do not emit "class method" debuginfo for types that are not
2628 DICompositeType][36008]
2629 * [Warn about multiple conflicting #[repr] hints][34623]
2630 * [When sizing DST, don't double-count nested struct prefixes][36351]
2631 * [Default RUST_MIN_STACK to 16MiB for now][36505]
2632 * [Improve rlib metadata format][36551]. Reduces rlib size significantly.
2633 * [Reject macros with empty repetitions to avoid infinite loop][36721]
2634 * [Expand macros without recursing to avoid stack overflows][36214]
2639 * [Replace macro backtraces with labeled local uses][35702]
2640 * [Improve error message for misplaced doc comments][33922]
2641 * [Buffer unix and lock windows to prevent message interleaving][35975]
2642 * [Update lifetime errors to specifically note temporaries][36171]
2643 * [Special case a few colors for Windows][36178]
2644 * [Suggest `use self` when such an import resolves][36289]
2645 * [Be more specific when type parameter shadows primitive type][36338]
2646 * Many minor improvements
2648 Compile-time Optimizations
2649 --------------------------
2651 * [Compute and cache HIR hashes at beginning][35854]
2652 * [Don't hash types in loan paths][36004]
2653 * [Cache projections in trans][35761]
2654 * [Optimize the parser's last token handling][36527]
2655 * [Only instantiate #[inline] functions in codegen units referencing
2656 them][36524]. This leads to big improvements in cases where crates export
2657 define many inline functions without using them directly.
2658 * [Lazily allocate TypedArena's first chunk][36592]
2659 * [Don't allocate during default HashSet creation][36734]
2666 * [`overflowing_abs`]
2667 * [`RefCell::try_borrow`]
2668 * [`RefCell::try_borrow_mut`]
2673 * [Add `assert_ne!` and `debug_assert_ne!`][35074]
2674 * [Make `vec_deque::Drain`, `hash_map::Drain`, and `hash_set::Drain`
2676 * [Implement `AsRef<[T]>` for `std::slice::Iter`][35559]
2677 * [Implement `Debug` for `std::vec::IntoIter`][35707]
2678 * [`CString`: avoid excessive growth just to 0-terminate][35871]
2679 * [Implement `CoerceUnsized` for `{Cell, RefCell, UnsafeCell}`][35627]
2680 * [Use arc4rand on FreeBSD][35884]
2681 * [memrchr: Correct aligned offset computation][35969]
2682 * [Improve Demangling of Rust Symbols][36059]
2683 * [Use monotonic time in condition variables][35048]
2684 * [Implement `Debug` for `std::path::{Components,Iter}`][36101]
2685 * [Implement conversion traits for `char`][35755]
2686 * [Fix illegal instruction caused by overflow in channel cloning][36104]
2687 * [Zero first byte of CString on drop][36264]
2688 * [Inherit overflow checks for sum and product][36372]
2689 * [Add missing Eq implementations][36423]
2690 * [Implement `Debug` for `DirEntry`][36631]
2691 * [When `getaddrinfo` returns `EAI_SYSTEM` retrieve actual error from
2693 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
2694 * [Implement more traits for `std::io::ErrorKind`][35911]
2695 * [Optimize BinaryHeap bounds checking][36072]
2696 * [Work around pointer aliasing issue in `Vec::extend_from_slice`,
2697 `extend_with_element`][36355]
2698 * [Fix overflow checking in unsigned pow()][34942]
2703 * This release includes security fixes to both curl and OpenSSL.
2704 * [Fix transitive doctests when panic=abort][cargo/3021]
2705 * [Add --all-features flag to cargo][cargo/3038]
2706 * [Reject path-based dependencies in `cargo package`][cargo/3060]
2707 * [Don't parse the home directory more than once][cargo/3078]
2708 * [Don't try to generate Cargo.lock on empty workspaces][cargo/3092]
2709 * [Update OpenSSL to 1.0.2j][cargo/3121]
2710 * [Add license and license_file to cargo metadata output][cargo/3110]
2711 * [Make crates-io registry URL optional in config; ignore all changes to
2712 source.crates-io][cargo/3089]
2713 * [Don't download dependencies from other platforms][cargo/3123]
2714 * [Build transitive dev-dependencies when needed][cargo/3125]
2715 * [Add support for per-target rustflags in .cargo/config][cargo/3157]
2716 * [Avoid updating registry when adding existing deps][cargo/3144]
2717 * [Warn about path overrides that won't work][cargo/3136]
2718 * [Use workspaces during `cargo install`][cargo/3146]
2719 * [Leak mspdbsrv.exe processes on Windows][cargo/3162]
2720 * [Add --message-format flag][cargo/3000]
2721 * [Pass target environment for rustdoc][cargo/3205]
2722 * [Use `CommandExt::exec` for `cargo run` on Unix][cargo/2818]
2723 * [Update curl and curl-sys][cargo/3241]
2724 * [Call rustdoc test with the correct cfg flags of a package][cargo/3242]
2729 * [rustdoc: Add the `--sysroot` argument][36586]
2730 * [rustdoc: Fix a couple of issues with the search results][35655]
2731 * [rustdoc: remove the `!` from macro URLs and titles][35234]
2732 * [gdb: Fix pretty-printing special-cased Rust types][35585]
2733 * [rustdoc: Filter more incorrect methods inherited through Deref][36266]
2738 * [Remove unmaintained style guide][35124]
2739 * [Add s390x support][36369]
2740 * [Initial work at Haiku OS support][36727]
2741 * [Add mips-uclibc targets][35734]
2742 * [Crate-ify compiler-rt into compiler-builtins][35021]
2743 * [Add rustc version info (git hash + date) to dist tarball][36213]
2744 * Many documentation improvements
2749 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
2750 * [Deny (by default) transmuting from fn item types to pointer-sized
2751 types][34923]. Continuing the long transition to zero-sized fn items,
2753 * [Fix `#[derive]` for empty tuple structs/variants][35728].
2755 * [Issue deprecation warnings for safe accesses to extern statics][36173]
2756 * [Fix lifetime rules for 'if' conditions][36029].
2757 * [Inherit overflow checks for sum and product][36372].
2758 * [Forbid user-defined macros named "macro_rules"][36730].
2760 [33922]: https://github.com/rust-lang/rust/pull/33922
2761 [34623]: https://github.com/rust-lang/rust/pull/34623
2762 [34923]: https://github.com/rust-lang/rust/pull/34923
2763 [34942]: https://github.com/rust-lang/rust/pull/34942
2764 [34982]: https://github.com/rust-lang/rust/pull/34982
2765 [35021]: https://github.com/rust-lang/rust/pull/35021
2766 [35048]: https://github.com/rust-lang/rust/pull/35048
2767 [35074]: https://github.com/rust-lang/rust/pull/35074
2768 [35124]: https://github.com/rust-lang/rust/pull/35124
2769 [35234]: https://github.com/rust-lang/rust/pull/35234
2770 [35238]: https://github.com/rust-lang/rust/pull/35238
2771 [35354]: https://github.com/rust-lang/rust/pull/35354
2772 [35559]: https://github.com/rust-lang/rust/pull/35559
2773 [35585]: https://github.com/rust-lang/rust/pull/35585
2774 [35627]: https://github.com/rust-lang/rust/pull/35627
2775 [35655]: https://github.com/rust-lang/rust/pull/35655
2776 [35702]: https://github.com/rust-lang/rust/pull/35702
2777 [35707]: https://github.com/rust-lang/rust/pull/35707
2778 [35728]: https://github.com/rust-lang/rust/pull/35728
2779 [35734]: https://github.com/rust-lang/rust/pull/35734
2780 [35755]: https://github.com/rust-lang/rust/pull/35755
2781 [35761]: https://github.com/rust-lang/rust/pull/35761
2782 [35764]: https://github.com/rust-lang/rust/pull/35764
2783 [35814]: https://github.com/rust-lang/rust/pull/35814
2784 [35854]: https://github.com/rust-lang/rust/pull/35854
2785 [35871]: https://github.com/rust-lang/rust/pull/35871
2786 [35884]: https://github.com/rust-lang/rust/pull/35884
2787 [35911]: https://github.com/rust-lang/rust/pull/35911
2788 [35969]: https://github.com/rust-lang/rust/pull/35969
2789 [35975]: https://github.com/rust-lang/rust/pull/35975
2790 [36004]: https://github.com/rust-lang/rust/pull/36004
2791 [36008]: https://github.com/rust-lang/rust/pull/36008
2792 [36014]: https://github.com/rust-lang/rust/pull/36014
2793 [36029]: https://github.com/rust-lang/rust/pull/36029
2794 [36059]: https://github.com/rust-lang/rust/pull/36059
2795 [36072]: https://github.com/rust-lang/rust/pull/36072
2796 [36101]: https://github.com/rust-lang/rust/pull/36101
2797 [36104]: https://github.com/rust-lang/rust/pull/36104
2798 [36171]: https://github.com/rust-lang/rust/pull/36171
2799 [36173]: https://github.com/rust-lang/rust/pull/36173
2800 [36178]: https://github.com/rust-lang/rust/pull/36178
2801 [36213]: https://github.com/rust-lang/rust/pull/36213
2802 [36214]: https://github.com/rust-lang/rust/pull/36214
2803 [36264]: https://github.com/rust-lang/rust/pull/36264
2804 [36266]: https://github.com/rust-lang/rust/pull/36266
2805 [36289]: https://github.com/rust-lang/rust/pull/36289
2806 [36338]: https://github.com/rust-lang/rust/pull/36338
2807 [36351]: https://github.com/rust-lang/rust/pull/36351
2808 [36355]: https://github.com/rust-lang/rust/pull/36355
2809 [36369]: https://github.com/rust-lang/rust/pull/36369
2810 [36372]: https://github.com/rust-lang/rust/pull/36372
2811 [36423]: https://github.com/rust-lang/rust/pull/36423
2812 [36482]: https://github.com/rust-lang/rust/pull/36482
2813 [36505]: https://github.com/rust-lang/rust/pull/36505
2814 [36524]: https://github.com/rust-lang/rust/pull/36524
2815 [36527]: https://github.com/rust-lang/rust/pull/36527
2816 [36551]: https://github.com/rust-lang/rust/pull/36551
2817 [36574]: https://github.com/rust-lang/rust/pull/36574
2818 [36586]: https://github.com/rust-lang/rust/pull/36586
2819 [36592]: https://github.com/rust-lang/rust/pull/36592
2820 [36631]: https://github.com/rust-lang/rust/pull/36631
2821 [36639]: https://github.com/rust-lang/rust/pull/36639
2822 [36721]: https://github.com/rust-lang/rust/pull/36721
2823 [36727]: https://github.com/rust-lang/rust/pull/36727
2824 [36730]: https://github.com/rust-lang/rust/pull/36730
2825 [36734]: https://github.com/rust-lang/rust/pull/36734
2826 [36754]: https://github.com/rust-lang/rust/pull/36754
2827 [36995]: https://github.com/rust-lang/rust/pull/36995
2828 [RFC 0016]: https://github.com/rust-lang/rfcs/blob/master/text/0016-more-attributes.md
2829 [RFC 0243]: https://github.com/rust-lang/rfcs/blob/master/text/0243-trait-based-exception-handling.md
2830 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
2831 [RFC 401]: https://github.com/rust-lang/rfcs/blob/master/text/0401-coercions.md
2832 [RFC 873]: https://github.com/rust-lang/rfcs/blob/master/text/0873-type-macros.md
2833 [cargo/2818]: https://github.com/rust-lang/cargo/pull/2818
2834 [cargo/3000]: https://github.com/rust-lang/cargo/pull/3000
2835 [cargo/3021]: https://github.com/rust-lang/cargo/pull/3021
2836 [cargo/3038]: https://github.com/rust-lang/cargo/pull/3038
2837 [cargo/3060]: https://github.com/rust-lang/cargo/pull/3060
2838 [cargo/3078]: https://github.com/rust-lang/cargo/pull/3078
2839 [cargo/3089]: https://github.com/rust-lang/cargo/pull/3089
2840 [cargo/3092]: https://github.com/rust-lang/cargo/pull/3092
2841 [cargo/3110]: https://github.com/rust-lang/cargo/pull/3110
2842 [cargo/3121]: https://github.com/rust-lang/cargo/pull/3121
2843 [cargo/3123]: https://github.com/rust-lang/cargo/pull/3123
2844 [cargo/3125]: https://github.com/rust-lang/cargo/pull/3125
2845 [cargo/3136]: https://github.com/rust-lang/cargo/pull/3136
2846 [cargo/3144]: https://github.com/rust-lang/cargo/pull/3144
2847 [cargo/3146]: https://github.com/rust-lang/cargo/pull/3146
2848 [cargo/3157]: https://github.com/rust-lang/cargo/pull/3157
2849 [cargo/3162]: https://github.com/rust-lang/cargo/pull/3162
2850 [cargo/3205]: https://github.com/rust-lang/cargo/pull/3205
2851 [cargo/3241]: https://github.com/rust-lang/cargo/pull/3241
2852 [cargo/3242]: https://github.com/rust-lang/cargo/pull/3242
2853 [rustup]: https://www.rustup.rs
2854 [`checked_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.checked_abs
2855 [`wrapping_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.wrapping_abs
2856 [`overflowing_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.overflowing_abs
2857 [`RefCell::try_borrow`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow
2858 [`RefCell::try_borrow_mut`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow_mut
2859 [`SipHasher`]: https://doc.rust-lang.org/std/hash/struct.SipHasher.html
2860 [`DefaultHasher`]: https://doc.rust-lang.org/std/collections/hash_map/struct.DefaultHasher.html
2863 Version 1.12.1 (2016-10-20)
2864 ===========================
2869 * [ICE: 'rustc' panicked at 'assertion failed: concrete_substs.is_normalized_for_trans()' #36381][36381]
2870 * [Confusion with double negation and booleans][36856]
2871 * [rustc 1.12.0 fails with SIGSEGV in release mode (syn crate 0.8.0)][36875]
2872 * [Rustc 1.12.0 Windows build of `ethcore` crate fails with LLVM error][36924]
2873 * [1.12.0: High memory usage when linking in release mode with debug info][36926]
2874 * [Corrupted memory after updated to 1.12][36936]
2875 * ["Let NullaryConstructor = something;" causes internal compiler error: "tried to overwrite interned AdtDef"][37026]
2876 * [Fix ICE: inject bitcast if types mismatch for invokes/calls/stores][37112]
2877 * [debuginfo: Handle spread_arg case in MIR-trans in a more stable way.][37153]
2879 [36381]: https://github.com/rust-lang/rust/issues/36381
2880 [36856]: https://github.com/rust-lang/rust/issues/36856
2881 [36875]: https://github.com/rust-lang/rust/issues/36875
2882 [36924]: https://github.com/rust-lang/rust/issues/36924
2883 [36926]: https://github.com/rust-lang/rust/issues/36926
2884 [36936]: https://github.com/rust-lang/rust/issues/36936
2885 [37026]: https://github.com/rust-lang/rust/issues/37026
2886 [37112]: https://github.com/rust-lang/rust/issues/37112
2887 [37153]: https://github.com/rust-lang/rust/issues/37153
2890 Version 1.12.0 (2016-09-29)
2891 ===========================
2896 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)](https://github.com/rust-lang/rust/pull/34096).
2897 This translation pass is far simpler than the previous AST->LLVM pass, and
2898 creates opportunities to perform new optimizations directly on the MIR. It
2899 was previously described [on the Rust blog](https://blog.rust-lang.org/2016/04/19/MIR.html).
2900 * [`rustc` presents a new, more readable error format, along with
2901 machine-readable JSON error output for use by IDEs](https://github.com/rust-lang/rust/pull/35401).
2902 Most common editors supporting Rust have been updated to work with it. It was
2903 previously described [on the Rust blog](https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
2908 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)](https://github.com/rust-lang/rust/pull/34096).
2909 This translation pass is far simpler than the previous AST->LLVM pass, and
2910 creates opportunities to perform new optimizations directly on the MIR. It
2911 was previously described [on the Rust blog](https://blog.rust-lang.org/2016/04/19/MIR.html).
2912 * [Print the Rust target name, not the LLVM target name, with
2913 `--print target-list`](https://github.com/rust-lang/rust/pull/35489)
2914 * [The computation of `TypeId` is correct in some cases where it was previously
2915 producing inconsistent results](https://github.com/rust-lang/rust/pull/35267)
2916 * [The `mips-unknown-linux-gnu` target uses hardware floating point by default](https://github.com/rust-lang/rust/pull/34910)
2917 * [The `rustc` arguments, `--print target-cpus`, `--print target-features`,
2918 `--print relocation-models`, and `--print code-models` print the available
2919 options to the `-C target-cpu`, `-C target-feature`, `-C relocation-model` and
2920 `-C code-model` code generation arguments](https://github.com/rust-lang/rust/pull/34845)
2921 * [`rustc` supports three new MUSL targets on ARM: `arm-unknown-linux-musleabi`,
2922 `arm-unknown-linux-musleabihf`, and `armv7-unknown-linux-musleabihf`](https://github.com/rust-lang/rust/pull/35060).
2923 These targets produce statically-linked binaries. There are no binary release
2929 * [`rustc` presents a new, more readable error format, along with
2930 machine-readable JSON error output for use by IDEs](https://github.com/rust-lang/rust/pull/35401).
2931 Most common editors supporting Rust have been updated to work with it. It was
2932 previously described [on the Rust blog](https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
2933 * [In error descriptions, references are now described in plain English,
2934 instead of as "&-ptr"](https://github.com/rust-lang/rust/pull/35611)
2935 * [In error type descriptions, unknown numeric types are named `{integer}` or
2936 `{float}` instead of `_`](https://github.com/rust-lang/rust/pull/35080)
2937 * [`rustc` emits a clearer error when inner attributes follow a doc comment](https://github.com/rust-lang/rust/pull/34676)
2942 * [`macro_rules!` invocations can be made within `macro_rules!` invocations](https://github.com/rust-lang/rust/pull/34925)
2943 * [`macro_rules!` meta-variables are hygienic](https://github.com/rust-lang/rust/pull/35453)
2944 * [`macro_rules!` `tt` matchers can be reparsed correctly, making them much more
2945 useful](https://github.com/rust-lang/rust/pull/34908)
2946 * [`macro_rules!` `stmt` matchers correctly consume the entire contents when
2947 inside non-braces invocations](https://github.com/rust-lang/rust/pull/34886)
2948 * [Semicolons are properly required as statement delimiters inside
2949 `macro_rules!` invocations](https://github.com/rust-lang/rust/pull/34660)
2950 * [`cfg_attr` works on `path` attributes](https://github.com/rust-lang/rust/pull/34546)
2955 * [`Cell::as_ptr`](https://doc.rust-lang.org/std/cell/struct.Cell.html#method.as_ptr)
2956 * [`RefCell::as_ptr`](https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.as_ptr)
2957 * [`IpAddr::is_unspecified`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_unspecified)
2958 * [`IpAddr::is_loopback`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_loopback)
2959 * [`IpAddr::is_multicast`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_multicast)
2960 * [`Ipv4Addr::is_unspecified`](https://doc.rust-lang.org/std/net/struct.Ipv4Addr.html#method.is_unspecified)
2961 * [`Ipv6Addr::octets`](https://doc.rust-lang.org/std/net/struct.Ipv6Addr.html#method.octets)
2962 * [`LinkedList::contains`](https://doc.rust-lang.org/std/collections/linked_list/struct.LinkedList.html#method.contains)
2963 * [`VecDeque::contains`](https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.contains)
2964 * [`ExitStatusExt::from_raw`](https://doc.rust-lang.org/std/os/unix/process/trait.ExitStatusExt.html#tymethod.from_raw).
2965 Both on Unix and Windows.
2966 * [`Receiver::recv_timeout`](https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.recv_timeout)
2967 * [`RecvTimeoutError`](https://doc.rust-lang.org/std/sync/mpsc/enum.RecvTimeoutError.html)
2968 * [`BinaryHeap::peek_mut`](https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.peek_mut)
2969 * [`PeekMut`](https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html)
2970 * [`iter::Product`](https://doc.rust-lang.org/std/iter/trait.Product.html)
2971 * [`iter::Sum`](https://doc.rust-lang.org/std/iter/trait.Sum.html)
2972 * [`OccupiedEntry::remove_entry`](https://doc.rust-lang.org/std/collections/btree_map/struct.OccupiedEntry.html#method.remove_entry)
2973 * [`VacantEntry::into_key`](https://doc.rust-lang.org/std/collections/btree_map/struct.VacantEntry.html#method.into_key)
2978 * [The `format!` macro and friends now allow a single argument to be formatted
2979 in multiple styles](https://github.com/rust-lang/rust/pull/33642)
2980 * [The lifetime bounds on `[T]::binary_search_by` and
2981 `[T]::binary_search_by_key` have been adjusted to be more flexible](https://github.com/rust-lang/rust/pull/34762)
2982 * [`Option` implements `From` for its contained type](https://github.com/rust-lang/rust/pull/34828)
2983 * [`Cell`, `RefCell` and `UnsafeCell` implement `From` for their contained type](https://github.com/rust-lang/rust/pull/35392)
2984 * [`RwLock` panics if the reader count overflows](https://github.com/rust-lang/rust/pull/35378)
2985 * [`vec_deque::Drain`, `hash_map::Drain` and `hash_set::Drain` are covariant](https://github.com/rust-lang/rust/pull/35354)
2986 * [`vec::Drain` and `binary_heap::Drain` are covariant](https://github.com/rust-lang/rust/pull/34951)
2987 * [`Cow<str>` implements `FromIterator` for `char`, `&str` and `String`](https://github.com/rust-lang/rust/pull/35064)
2988 * [Sockets on Linux are correctly closed in subprocesses via `SOCK_CLOEXEC`](https://github.com/rust-lang/rust/pull/34946)
2989 * [`hash_map::Entry`, `hash_map::VacantEntry` and `hash_map::OccupiedEntry`
2990 implement `Debug`](https://github.com/rust-lang/rust/pull/34937)
2991 * [`btree_map::Entry`, `btree_map::VacantEntry` and `btree_map::OccupiedEntry`
2992 implement `Debug`](https://github.com/rust-lang/rust/pull/34885)
2993 * [`String` implements `AddAssign`](https://github.com/rust-lang/rust/pull/34890)
2994 * [Variadic `extern fn` pointers implement the `Clone`, `PartialEq`, `Eq`,
2995 `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and `fmt::Debug` traits](https://github.com/rust-lang/rust/pull/34879)
2996 * [`FileType` implements `Debug`](https://github.com/rust-lang/rust/pull/34757)
2997 * [References to `Mutex` and `RwLock` are unwind-safe](https://github.com/rust-lang/rust/pull/34756)
2998 * [`mpsc::sync_channel` `Receiver`s return any available message before
2999 reporting a disconnect](https://github.com/rust-lang/rust/pull/34731)
3000 * [Unicode definitions have been updated to 9.0](https://github.com/rust-lang/rust/pull/34599)
3001 * [`env` iterators implement `DoubleEndedIterator`](https://github.com/rust-lang/rust/pull/33312)
3006 * [Support local mirrors of registries](https://github.com/rust-lang/cargo/pull/2857)
3007 * [Add support for command aliases](https://github.com/rust-lang/cargo/pull/2679)
3008 * [Allow `opt-level="s"` / `opt-level="z"` in profile overrides](https://github.com/rust-lang/cargo/pull/3007)
3009 * [Make `cargo doc --open --target` work as expected](https://github.com/rust-lang/cargo/pull/2988)
3010 * [Speed up noop registry updates](https://github.com/rust-lang/cargo/pull/2974)
3011 * [Update OpenSSL](https://github.com/rust-lang/cargo/pull/2971)
3012 * [Fix `--panic=abort` with plugins](https://github.com/rust-lang/cargo/pull/2954)
3013 * [Always pass `-C metadata` to the compiler](https://github.com/rust-lang/cargo/pull/2946)
3014 * [Fix depending on git repos with workspaces](https://github.com/rust-lang/cargo/pull/2938)
3015 * [Add a `--lib` flag to `cargo new`](https://github.com/rust-lang/cargo/pull/2921)
3016 * [Add `http.cainfo` for custom certs](https://github.com/rust-lang/cargo/pull/2917)
3017 * [Indicate the compilation profile after compiling](https://github.com/rust-lang/cargo/pull/2909)
3018 * [Allow enabling features for dependencies with `--features`](https://github.com/rust-lang/cargo/pull/2876)
3019 * [Add `--jobs` flag to `cargo package`](https://github.com/rust-lang/cargo/pull/2867)
3020 * [Add `--dry-run` to `cargo publish`](https://github.com/rust-lang/cargo/pull/2849)
3021 * [Add support for `RUSTDOCFLAGS`](https://github.com/rust-lang/cargo/pull/2794)
3026 * [`panic::catch_unwind` is more optimized](https://github.com/rust-lang/rust/pull/35444)
3027 * [`panic::catch_unwind` no longer accesses thread-local storage on entry](https://github.com/rust-lang/rust/pull/34866)
3032 * [Test binaries now support a `--test-threads` argument to specify the number
3033 of threads used to run tests, and which acts the same as the
3034 `RUST_TEST_THREADS` environment variable](https://github.com/rust-lang/rust/pull/35414)
3035 * [The test runner now emits a warning when tests run over 60 seconds](https://github.com/rust-lang/rust/pull/35405)
3036 * [rustdoc: Fix methods in search results](https://github.com/rust-lang/rust/pull/34752)
3037 * [`rust-lldb` warns about unsupported versions of LLDB](https://github.com/rust-lang/rust/pull/34646)
3038 * [Rust releases now come with source packages that can be installed by rustup
3039 via `rustup component add rust-src`](https://github.com/rust-lang/rust/pull/34366).
3040 The resulting source code can be used by tools and IDES, located in the
3041 sysroot under `lib/rustlib/src`.
3046 * [The compiler can now be built against LLVM 3.9](https://github.com/rust-lang/rust/pull/35594)
3047 * Many minor improvements to the documentation.
3048 * [The Rust exception handling "personality" routine is now written in Rust](https://github.com/rust-lang/rust/pull/34832)
3053 * [When printing Windows `OsStr`s, unpaired surrogate codepoints are escaped
3054 with the lowercase format instead of the uppercase](https://github.com/rust-lang/rust/pull/35084)
3055 * [When formatting strings, if "precision" is specified, the "fill",
3056 "align" and "width" specifiers are no longer ignored](https://github.com/rust-lang/rust/pull/34544)
3057 * [The `Debug` impl for strings no longer escapes all non-ASCII characters](https://github.com/rust-lang/rust/pull/34485)
3060 Version 1.11.0 (2016-08-18)
3061 ===========================
3066 * [`cfg_attr` works on `path` attributes](https://github.com/rust-lang/rust/pull/34546)
3067 * [Support nested `cfg_attr` attributes](https://github.com/rust-lang/rust/pull/34216)
3068 * [Allow statement-generating braced macro invocations at the end of blocks](https://github.com/rust-lang/rust/pull/34436)
3069 * [Macros can be expanded inside of trait definitions](https://github.com/rust-lang/rust/pull/34213)
3070 * [`#[macro_use]` works properly when it is itself expanded from a macro](https://github.com/rust-lang/rust/pull/34032)
3075 * [`BinaryHeap::append`](https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.append)
3076 * [`BTreeMap::append`](https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.append)
3077 * [`BTreeMap::split_off`](https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.split_off)
3078 * [`BTreeSet::append`](https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.append)
3079 * [`BTreeSet::split_off`](https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.split_off)
3080 * [`f32::to_degrees`](https://doc.rust-lang.org/std/primitive.f32.html#method.to_degrees)
3081 (in libcore - previously stabilized in libstd)
3082 * [`f32::to_radians`](https://doc.rust-lang.org/std/primitive.f32.html#method.to_radians)
3083 (in libcore - previously stabilized in libstd)
3084 * [`f64::to_degrees`](https://doc.rust-lang.org/std/primitive.f64.html#method.to_degrees)
3085 (in libcore - previously stabilized in libstd)
3086 * [`f64::to_radians`](https://doc.rust-lang.org/std/primitive.f64.html#method.to_radians)
3087 (in libcore - previously stabilized in libstd)
3088 * [`Iterator::sum`](https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
3089 * [`Iterator::product`](https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
3090 * [`Cell::get_mut`](https://doc.rust-lang.org/std/cell/struct.Cell.html#method.get_mut)
3091 * [`RefCell::get_mut`](https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.get_mut)
3096 * [The `thread_local!` macro supports multiple definitions in a single
3097 invocation, and can apply attributes](https://github.com/rust-lang/rust/pull/34077)
3098 * [`Cow` implements `Default`](https://github.com/rust-lang/rust/pull/34305)
3099 * [`Wrapping` implements binary, octal, lower-hex and upper-hex
3100 `Display` formatting](https://github.com/rust-lang/rust/pull/34190)
3101 * [The range types implement `Hash`](https://github.com/rust-lang/rust/pull/34180)
3102 * [`lookup_host` ignores unknown address types](https://github.com/rust-lang/rust/pull/34067)
3103 * [`assert_eq!` accepts a custom error message, like `assert!` does](https://github.com/rust-lang/rust/pull/33976)
3104 * [The main thread is now called "main" instead of "<main>"](https://github.com/rust-lang/rust/pull/33803)
3109 * [Disallow specifying features of transitive deps](https://github.com/rust-lang/cargo/pull/2821)
3110 * [Add color support for Windows consoles](https://github.com/rust-lang/cargo/pull/2804)
3111 * [Fix `harness = false` on `[lib]` sections](https://github.com/rust-lang/cargo/pull/2795)
3112 * [Don't panic when `links` contains a '.'](https://github.com/rust-lang/cargo/pull/2787)
3113 * [Build scripts can emit warnings](https://github.com/rust-lang/cargo/pull/2630),
3114 and `-vv` prints warnings for all crates.
3115 * [Ignore file locks on OS X NFS mounts](https://github.com/rust-lang/cargo/pull/2720)
3116 * [Don't warn about `package.metadata` keys](https://github.com/rust-lang/cargo/pull/2668).
3117 This provides room for expansion by arbitrary tools.
3118 * [Add support for cdylib crate types](https://github.com/rust-lang/cargo/pull/2741)
3119 * [Prevent publishing crates when files are dirty](https://github.com/rust-lang/cargo/pull/2781)
3120 * [Don't fetch all crates on clean](https://github.com/rust-lang/cargo/pull/2704)
3121 * [Propagate --color option to rustc](https://github.com/rust-lang/cargo/pull/2779)
3122 * [Fix `cargo doc --open` on Windows](https://github.com/rust-lang/cargo/pull/2780)
3123 * [Improve autocompletion](https://github.com/rust-lang/cargo/pull/2772)
3124 * [Configure colors of stderr as well as stdout](https://github.com/rust-lang/cargo/pull/2739)
3129 * [Caching projections speeds up type check dramatically for some
3130 workloads](https://github.com/rust-lang/rust/pull/33816)
3131 * [The default `HashMap` hasher is SipHash 1-3 instead of SipHash 2-4](https://github.com/rust-lang/rust/pull/33940)
3132 This hasher is faster, but is believed to provide sufficient
3133 protection from collision attacks.
3134 * [Comparison of `Ipv4Addr` is 10x faster](https://github.com/rust-lang/rust/pull/33891)
3139 * [Fix empty implementation section on some module pages](https://github.com/rust-lang/rust/pull/34536)
3140 * [Fix inlined renamed re-exports in import lists](https://github.com/rust-lang/rust/pull/34479)
3141 * [Fix search result layout for enum variants and struct fields](https://github.com/rust-lang/rust/pull/34477)
3142 * [Fix issues with source links to external crates](https://github.com/rust-lang/rust/pull/34387)
3143 * [Fix redirect pages for renamed re-exports](https://github.com/rust-lang/rust/pull/34245)
3148 * [rustc is better at finding the MSVC toolchain](https://github.com/rust-lang/rust/pull/34492)
3149 * [When emitting debug info, rustc emits frame pointers for closures,
3150 shims and glue, as it does for all other functions](https://github.com/rust-lang/rust/pull/33909)
3151 * [rust-lldb warns about unsupported versions of LLDB](https://github.com/rust-lang/rust/pull/34646)
3152 * Many more errors have been given error codes and extended
3154 * API documentation continues to be improved, with many new examples
3159 * [rustc no longer hangs when dependencies recursively re-export
3160 submodules](https://github.com/rust-lang/rust/pull/34542)
3161 * [rustc requires LLVM 3.7+](https://github.com/rust-lang/rust/pull/34104)
3162 * [The 'How Safe and Unsafe Interact' chapter of The Rustonomicon was
3163 rewritten](https://github.com/rust-lang/rust/pull/33895)
3164 * [rustc support 16-bit pointer sizes](https://github.com/rust-lang/rust/pull/33460).
3165 No targets use this yet, but it works toward AVR support.
3170 * [`const`s and `static`s may not have unsized types](https://github.com/rust-lang/rust/pull/34443)
3171 * [The new follow-set rules that place restrictions on `macro_rules!`
3172 in order to ensure syntax forward-compatibility have been enabled](https://github.com/rust-lang/rust/pull/33982)
3173 This was an [amendment to RFC 550](https://github.com/rust-lang/rfcs/pull/1384),
3174 and has been a warning since 1.10.
3175 * [`cfg` attribute process has been refactored to fix various bugs](https://github.com/rust-lang/rust/pull/33706).
3176 This causes breakage in some corner cases.
3179 Version 1.10.0 (2016-07-07)
3180 ===========================
3185 * [Allow `concat_idents!` in type positions as well as in expression
3186 positions](https://github.com/rust-lang/rust/pull/33735).
3187 * [`Copy` types are required to have a trivial implementation of `Clone`](https://github.com/rust-lang/rust/pull/33420).
3188 [RFC 1521](https://github.com/rust-lang/rfcs/blob/master/text/1521-copy-clone-semantics.md).
3189 * [Single-variant enums support the `#[repr(..)]` attribute](https://github.com/rust-lang/rust/pull/33355).
3190 * [Fix `#[derive(RustcEncodable)]` in the presence of other `encode` methods](https://github.com/rust-lang/rust/pull/32908).
3191 * [`panic!` can be converted to a runtime abort with the
3192 `-C panic=abort` flag](https://github.com/rust-lang/rust/pull/32900).
3193 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
3194 * [Add a new crate type, 'cdylib'](https://github.com/rust-lang/rust/pull/33553).
3195 cdylibs are dynamic libraries suitable for loading by non-Rust hosts.
3196 [RFC 1510](https://github.com/rust-lang/rfcs/blob/master/text/1510-cdylib.md).
3197 Note that Cargo does not yet directly support cdylibs.
3202 * `os::windows::fs::OpenOptionsExt::access_mode`
3203 * `os::windows::fs::OpenOptionsExt::share_mode`
3204 * `os::windows::fs::OpenOptionsExt::custom_flags`
3205 * `os::windows::fs::OpenOptionsExt::attributes`
3206 * `os::windows::fs::OpenOptionsExt::security_qos_flags`
3207 * `os::unix::fs::OpenOptionsExt::custom_flags`
3208 * [`sync::Weak::new`](http://doc.rust-lang.org/alloc/arc/struct.Weak.html#method.new)
3209 * `Default for sync::Weak`
3210 * [`panic::set_hook`](http://doc.rust-lang.org/std/panic/fn.set_hook.html)
3211 * [`panic::take_hook`](http://doc.rust-lang.org/std/panic/fn.take_hook.html)
3212 * [`panic::PanicInfo`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html)
3213 * [`panic::PanicInfo::payload`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.payload)
3214 * [`panic::PanicInfo::location`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.location)
3215 * [`panic::Location`](http://doc.rust-lang.org/std/panic/struct.Location.html)
3216 * [`panic::Location::file`](http://doc.rust-lang.org/std/panic/struct.Location.html#method.file)
3217 * [`panic::Location::line`](http://doc.rust-lang.org/std/panic/struct.Location.html#method.line)
3218 * [`ffi::CStr::from_bytes_with_nul`](http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul)
3219 * [`ffi::CStr::from_bytes_with_nul_unchecked`](http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul_unchecked)
3220 * [`ffi::FromBytesWithNulError`](http://doc.rust-lang.org/std/ffi/struct.FromBytesWithNulError.html)
3221 * [`fs::Metadata::modified`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.modified)
3222 * [`fs::Metadata::accessed`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.accessed)
3223 * [`fs::Metadata::created`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.created)
3224 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange`
3225 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange_weak`
3226 * `collections::{btree,hash}_map::{Occupied,Vacant,}Entry::key`
3227 * `os::unix::net::{UnixStream, UnixListener, UnixDatagram, SocketAddr}`
3228 * [`SocketAddr::is_unnamed`](http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.is_unnamed)
3229 * [`SocketAddr::as_pathname`](http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.as_pathname)
3230 * [`UnixStream::connect`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.connect)
3231 * [`UnixStream::pair`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.pair)
3232 * [`UnixStream::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.try_clone)
3233 * [`UnixStream::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.local_addr)
3234 * [`UnixStream::peer_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.peer_addr)
3235 * [`UnixStream::set_read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
3236 * [`UnixStream::set_write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
3237 * [`UnixStream::read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
3238 * [`UnixStream::write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
3239 * [`UnixStream::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.set_nonblocking)
3240 * [`UnixStream::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.take_error)
3241 * [`UnixStream::shutdown`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.shutdown)
3242 * Read/Write/RawFd impls for `UnixStream`
3243 * [`UnixListener::bind`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.bind)
3244 * [`UnixListener::accept`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.accept)
3245 * [`UnixListener::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.try_clone)
3246 * [`UnixListener::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.local_addr)
3247 * [`UnixListener::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.set_nonblocking)
3248 * [`UnixListener::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.take_error)
3249 * [`UnixListener::incoming`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.incoming)
3250 * RawFd impls for `UnixListener`
3251 * [`UnixDatagram::bind`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.bind)
3252 * [`UnixDatagram::unbound`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.unbound)
3253 * [`UnixDatagram::pair`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.pair)
3254 * [`UnixDatagram::connect`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.connect)
3255 * [`UnixDatagram::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.try_clone)
3256 * [`UnixDatagram::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.local_addr)
3257 * [`UnixDatagram::peer_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.peer_addr)
3258 * [`UnixDatagram::recv_from`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv_from)
3259 * [`UnixDatagram::recv`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv)
3260 * [`UnixDatagram::send_to`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send_to)
3261 * [`UnixDatagram::send`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send)
3262 * [`UnixDatagram::set_read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_read_timeout)
3263 * [`UnixDatagram::set_write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_write_timeout)
3264 * [`UnixDatagram::read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.read_timeout)
3265 * [`UnixDatagram::write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.write_timeout)
3266 * [`UnixDatagram::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_nonblocking)
3267 * [`UnixDatagram::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.take_error)
3268 * [`UnixDatagram::shutdown`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.shutdown)
3269 * RawFd impls for `UnixDatagram`
3270 * `{BTree,Hash}Map::values_mut`
3271 * [`<[_]>::binary_search_by_key`](http://doc.rust-lang.org/std/primitive.slice.html#method.binary_search_by_key)
3276 * [The `abs_sub` method of floats is deprecated](https://github.com/rust-lang/rust/pull/33664).
3277 The semantics of this minor method are subtle and probably not what
3279 * [Add implementation of Ord for Cell<T> and RefCell<T> where T: Ord](https://github.com/rust-lang/rust/pull/33306).
3280 * [On Linux, if `HashMap`s can't be initialized with `getrandom` they
3281 will fall back to `/dev/urandom` temporarily to avoid blocking
3282 during early boot](https://github.com/rust-lang/rust/pull/33086).
3283 * [Implemented negation for wrapping numerals](https://github.com/rust-lang/rust/pull/33067).
3284 * [Implement `Clone` for `binary_heap::IntoIter`](https://github.com/rust-lang/rust/pull/33050).
3285 * [Implement `Display` and `Hash` for `std::num::Wrapping`](https://github.com/rust-lang/rust/pull/33023).
3286 * [Add `Default` implementation for `&CStr`, `CString`](https://github.com/rust-lang/rust/pull/32990).
3287 * [Implement `From<Vec<T>>` and `Into<Vec<T>>` for `VecDeque<T>`](https://github.com/rust-lang/rust/pull/32866).
3288 * [Implement `Default` for `UnsafeCell`, `fmt::Error`, `Condvar`,
3289 `Mutex`, `RwLock`](https://github.com/rust-lang/rust/pull/32785).
3293 * [Cargo.toml supports the `profile.*.panic` option](https://github.com/rust-lang/cargo/pull/2687).
3294 This controls the runtime behavior of the `panic!` macro
3295 and can be either "unwind" (the default), or "abort".
3296 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
3297 * [Don't throw away errors with `-p` arguments](https://github.com/rust-lang/cargo/pull/2723).
3298 * [Report status to stderr instead of stdout](https://github.com/rust-lang/cargo/pull/2693).
3299 * [Build scripts are passed a `CARGO_MANIFEST_LINKS` environment
3300 variable that corresponds to the `links` field of the manifest](https://github.com/rust-lang/cargo/pull/2710).
3301 * [Ban keywords from crate names](https://github.com/rust-lang/cargo/pull/2707).
3302 * [Canonicalize `CARGO_HOME` on Windows](https://github.com/rust-lang/cargo/pull/2604).
3303 * [Retry network requests](https://github.com/rust-lang/cargo/pull/2396).
3304 By default they are retried twice, which can be customized with the
3305 `net.retry` value in `.cargo/config`.
3306 * [Don't print extra error info for failing subcommands](https://github.com/rust-lang/cargo/pull/2674).
3307 * [Add `--force` flag to `cargo install`](https://github.com/rust-lang/cargo/pull/2405).
3308 * [Don't use `flock` on NFS mounts](https://github.com/rust-lang/cargo/pull/2623).
3309 * [Prefer building `cargo install` artifacts in temporary directories](https://github.com/rust-lang/cargo/pull/2610).
3310 Makes it possible to install multiple crates in parallel.
3311 * [Add `cargo test --doc`](https://github.com/rust-lang/cargo/pull/2578).
3312 * [Add `cargo --explain`](https://github.com/rust-lang/cargo/pull/2551).
3313 * [Don't print warnings when `-q` is passed](https://github.com/rust-lang/cargo/pull/2576).
3314 * [Add `cargo doc --lib` and `--bin`](https://github.com/rust-lang/cargo/pull/2577).
3315 * [Don't require build script output to be UTF-8](https://github.com/rust-lang/cargo/pull/2560).
3316 * [Correctly attempt multiple git usernames](https://github.com/rust-lang/cargo/pull/2584).
3321 * [rustc memory usage was reduced by refactoring the context used for
3322 type checking](https://github.com/rust-lang/rust/pull/33425).
3323 * [Speed up creation of `HashMap`s by caching the random keys used
3324 to initialize the hash state](https://github.com/rust-lang/rust/pull/33318).
3325 * [The `find` implementation for `Chain` iterators is 2x faster](https://github.com/rust-lang/rust/pull/33289).
3326 * [Trait selection optimizations speed up type checking by 15%](https://github.com/rust-lang/rust/pull/33138).
3327 * [Efficient trie lookup for boolean Unicode properties](https://github.com/rust-lang/rust/pull/33098).
3328 10x faster than the previous lookup tables.
3329 * [Special case `#[derive(Copy, Clone)]` to avoid bloat](https://github.com/rust-lang/rust/pull/31414).
3334 * Many incremental improvements to documentation and rustdoc.
3335 * [rustdoc: List blanket trait impls](https://github.com/rust-lang/rust/pull/33514).
3336 * [rustdoc: Clean up ABI rendering](https://github.com/rust-lang/rust/pull/33151).
3337 * [Indexing with the wrong type produces a more informative error](https://github.com/rust-lang/rust/pull/33401).
3338 * [Improve diagnostics for constants being used in irrefutable patterns](https://github.com/rust-lang/rust/pull/33406).
3339 * [When many method candidates are in scope limit the suggestions to 10](https://github.com/rust-lang/rust/pull/33338).
3340 * [Remove confusing suggestion when calling a `fn` type](https://github.com/rust-lang/rust/pull/33325).
3341 * [Do not suggest changing `&mut self` to `&mut mut self`](https://github.com/rust-lang/rust/pull/33319).
3346 * [Update i686-linux-android features to match Android ABI](https://github.com/rust-lang/rust/pull/33651).
3347 * [Update aarch64-linux-android features to match Android ABI](https://github.com/rust-lang/rust/pull/33500).
3348 * [`std` no longer prints backtraces on platforms where the running
3349 module must be loaded with `env::current_exe`, which can't be relied
3350 on](https://github.com/rust-lang/rust/pull/33554).
3351 * This release includes std binaries for the i586-unknown-linux-gnu,
3352 i686-unknown-linux-musl, and armv7-linux-androideabi targets. The
3353 i586 target is for old x86 hardware without SSE2, and the armv7
3354 target is for Android running on modern ARM architectures.
3355 * [The `rust-gdb` and `rust-lldb` scripts are distributed on all
3356 Unix platforms](https://github.com/rust-lang/rust/pull/32835).
3357 * [On Unix the runtime aborts by calling `libc::abort` instead of
3358 generating an illegal instruction](https://github.com/rust-lang/rust/pull/31457).
3359 * [Rust is now bootstrapped from the previous release of Rust,
3360 instead of a snapshot from an arbitrary commit](https://github.com/rust-lang/rust/pull/32942).
3365 * [`AtomicBool` is now bool-sized, not word-sized](https://github.com/rust-lang/rust/pull/33579).
3366 * [`target_env` for Linux ARM targets is just `gnu`, not
3367 `gnueabihf`, `gnueabi`, etc](https://github.com/rust-lang/rust/pull/33403).
3368 * [Consistently panic on overflow in `Duration::new`](https://github.com/rust-lang/rust/pull/33072).
3369 * [Change `String::truncate` to panic less](https://github.com/rust-lang/rust/pull/32977).
3370 * [Add `:block` to the follow set for `:ty` and `:path`](https://github.com/rust-lang/rust/pull/32945).
3371 Affects how macros are parsed.
3372 * [Fix macro hygiene bug](https://github.com/rust-lang/rust/pull/32923).
3373 * [Feature-gated attributes on macro-generated macro invocations are
3374 now rejected](https://github.com/rust-lang/rust/pull/32791).
3375 * [Suppress fallback and ambiguity errors during type inference](https://github.com/rust-lang/rust/pull/32258).
3376 This caused some minor changes to type inference.
3379 Version 1.9.0 (2016-05-26)
3380 ==========================
3385 * The `#[deprecated]` attribute when applied to an API will generate
3386 warnings when used. The warnings may be suppressed with
3387 `#[allow(deprecated)]`. [RFC 1270].
3388 * [`fn` item types are zero sized, and each `fn` names a unique
3389 type][1.9fn]. This will break code that transmutes `fn`s, so calling
3390 `transmute` on a `fn` type will generate a warning for a few cycles,
3391 then will be converted to an error.
3392 * [Field and method resolution understand visibility, so private
3393 fields and methods cannot prevent the proper use of public fields
3394 and methods][1.9fv].
3395 * [The parser considers unicode codepoints in the
3396 `PATTERN_WHITE_SPACE` category to be whitespace][1.9ws].
3402 * [`std::panic::catch_unwind`][] (renamed from `recover`)
3403 * [`std::panic::resume_unwind`][] (renamed from `propagate`)
3404 * [`std::panic::AssertUnwindSafe`][] (renamed from `AssertRecoverSafe`)
3405 * [`std::panic::UnwindSafe`][] (renamed from `RecoverSafe`)
3406 * [`str::is_char_boundary`]
3407 * [`<*const T>::as_ref`]
3408 * [`<*mut T>::as_ref`]
3409 * [`<*mut T>::as_mut`]
3410 * [`AsciiExt::make_ascii_uppercase`]
3411 * [`AsciiExt::make_ascii_lowercase`]
3412 * [`char::decode_utf16`]
3413 * [`char::DecodeUtf16`]
3414 * [`char::DecodeUtf16Error`]
3415 * [`char::DecodeUtf16Error::unpaired_surrogate`]
3416 * [`BTreeSet::take`]
3417 * [`BTreeSet::replace`]
3420 * [`HashSet::replace`]
3422 * [`OsString::with_capacity`]
3423 * [`OsString::clear`]
3424 * [`OsString::capacity`]
3425 * [`OsString::reserve`]
3426 * [`OsString::reserve_exact`]
3427 * [`OsStr::is_empty`]
3429 * [`std::os::unix::thread`]
3432 * [`JoinHandleExt::as_pthread_t`]
3433 * [`JoinHandleExt::into_pthread_t`]
3434 * [`HashSet::hasher`]
3435 * [`HashMap::hasher`]
3436 * [`CommandExt::exec`]
3437 * [`File::try_clone`]
3438 * [`SocketAddr::set_ip`]
3439 * [`SocketAddr::set_port`]
3440 * [`SocketAddrV4::set_ip`]
3441 * [`SocketAddrV4::set_port`]
3442 * [`SocketAddrV6::set_ip`]
3443 * [`SocketAddrV6::set_port`]
3444 * [`SocketAddrV6::set_flowinfo`]
3445 * [`SocketAddrV6::set_scope_id`]
3446 * [`slice::copy_from_slice`]
3447 * [`ptr::read_volatile`]
3448 * [`ptr::write_volatile`]
3449 * [`OpenOptions::create_new`]
3450 * [`TcpStream::set_nodelay`]
3451 * [`TcpStream::nodelay`]
3452 * [`TcpStream::set_ttl`]
3453 * [`TcpStream::ttl`]
3454 * [`TcpStream::set_only_v6`]
3455 * [`TcpStream::only_v6`]
3456 * [`TcpStream::take_error`]
3457 * [`TcpStream::set_nonblocking`]
3458 * [`TcpListener::set_ttl`]
3459 * [`TcpListener::ttl`]
3460 * [`TcpListener::set_only_v6`]
3461 * [`TcpListener::only_v6`]
3462 * [`TcpListener::take_error`]
3463 * [`TcpListener::set_nonblocking`]
3464 * [`UdpSocket::set_broadcast`]
3465 * [`UdpSocket::broadcast`]
3466 * [`UdpSocket::set_multicast_loop_v4`]
3467 * [`UdpSocket::multicast_loop_v4`]
3468 * [`UdpSocket::set_multicast_ttl_v4`]
3469 * [`UdpSocket::multicast_ttl_v4`]
3470 * [`UdpSocket::set_multicast_loop_v6`]
3471 * [`UdpSocket::multicast_loop_v6`]
3472 * [`UdpSocket::set_multicast_ttl_v6`]
3473 * [`UdpSocket::multicast_ttl_v6`]
3474 * [`UdpSocket::set_ttl`]
3475 * [`UdpSocket::ttl`]
3476 * [`UdpSocket::set_only_v6`]
3477 * [`UdpSocket::only_v6`]
3478 * [`UdpSocket::join_multicast_v4`]
3479 * [`UdpSocket::join_multicast_v6`]
3480 * [`UdpSocket::leave_multicast_v4`]
3481 * [`UdpSocket::leave_multicast_v6`]
3482 * [`UdpSocket::take_error`]
3483 * [`UdpSocket::connect`]
3484 * [`UdpSocket::send`]
3485 * [`UdpSocket::recv`]
3486 * [`UdpSocket::set_nonblocking`]
3491 * [`std::sync::Once` is poisoned if its initialization function
3493 * [`cell::Ref` and `cell::RefMut` can contain unsized types][1.9cu].
3494 * [Most types implement `fmt::Debug`][1.9db].
3495 * [The default buffer size used by `BufReader` and `BufWriter` was
3496 reduced to 8K, from 64K][1.9bf]. This is in line with the buffer size
3497 used by other languages.
3498 * [`Instant`, `SystemTime` and `Duration` implement `+=` and `-=`.
3499 `Duration` additionally implements `*=` and `/=`][1.9ta].
3500 * [`Skip` is a `DoubleEndedIterator`][1.9sk].
3501 * [`From<[u8; 4]>` is implemented for `Ipv4Addr`][1.9fi].
3502 * [`Chain` implements `BufRead`][1.9ch].
3503 * [`HashMap`, `HashSet` and iterators are covariant][1.9hc].
3508 * [Cargo can now run concurrently][1.9cc].
3509 * [Top-level overrides allow specific revisions of crates to be
3510 overridden through the entire crate graph][1.9ct]. This is intended
3511 to make upgrades easier for large projects, by allowing crates to be
3512 forked temporarily until they've been upgraded and republished.
3513 * [Cargo exports a `CARGO_PKG_AUTHORS` environment variable][1.9cp].
3514 * [Cargo will pass the contents of the `RUSTFLAGS` variable to `rustc`
3515 on the commandline][1.9cf]. `rustc` arguments can also be specified
3516 in the `build.rustflags` configuration key.
3521 * [The time complexity of comparing variables for equivalence during type
3522 unification is reduced from _O_(_n_!) to _O_(_n_)][1.9tu]. This leads
3523 to major compilation time improvement in some scenarios.
3524 * [`ToString` is specialized for `str`, giving it the same performance
3525 as `to_owned`][1.9ts].
3526 * [Spawning processes with `Command::output` no longer creates extra
3528 * [`#[derive(PartialEq)]` and `#[derive(PartialOrd)]` emit less code
3529 for C-like enums][1.9cl].
3534 * [Passing the `--quiet` flag to a test runner will produce
3535 much-abbreviated output][1.9q].
3536 * The Rust Project now publishes std binaries for the
3537 `mips-unknown-linux-musl`, `mipsel-unknown-linux-musl`, and
3538 `i586-pc-windows-msvc` targets.
3543 * [`std::sync::Once` is poisoned if its initialization function
3545 * [It is illegal to define methods with the same name in overlapping
3546 inherent `impl` blocks][1.9sn].
3547 * [`fn` item types are zero sized, and each `fn` names a unique
3548 type][1.9fn]. This will break code that transmutes `fn`s, so calling
3549 `transmute` on a `fn` type will generate a warning for a few cycles,
3550 then will be converted to an error.
3551 * [Improvements to const evaluation may trigger new errors when integer
3552 literals are out of range][1.9ce].
3555 [1.9bf]: https://github.com/rust-lang/rust/pull/32695
3556 [1.9cc]: https://github.com/rust-lang/cargo/pull/2486
3557 [1.9ce]: https://github.com/rust-lang/rust/pull/30587
3558 [1.9cf]: https://github.com/rust-lang/cargo/pull/2241
3559 [1.9ch]: https://github.com/rust-lang/rust/pull/32541
3560 [1.9cl]: https://github.com/rust-lang/rust/pull/31977
3561 [1.9cp]: https://github.com/rust-lang/cargo/pull/2465
3562 [1.9ct]: https://github.com/rust-lang/cargo/pull/2385
3563 [1.9cu]: https://github.com/rust-lang/rust/pull/32652
3564 [1.9db]: https://github.com/rust-lang/rust/pull/32054
3565 [1.9fi]: https://github.com/rust-lang/rust/pull/32050
3566 [1.9fn]: https://github.com/rust-lang/rust/pull/31710
3567 [1.9fv]: https://github.com/rust-lang/rust/pull/31938
3568 [1.9hc]: https://github.com/rust-lang/rust/pull/32635
3569 [1.9o]: https://github.com/rust-lang/rust/pull/32325
3570 [1.9q]: https://github.com/rust-lang/rust/pull/31887
3571 [1.9sk]: https://github.com/rust-lang/rust/pull/31700
3572 [1.9sn]: https://github.com/rust-lang/rust/pull/31925
3573 [1.9sp]: https://github.com/rust-lang/rust/pull/31618
3574 [1.9ta]: https://github.com/rust-lang/rust/pull/32448
3575 [1.9ts]: https://github.com/rust-lang/rust/pull/32586
3576 [1.9tu]: https://github.com/rust-lang/rust/pull/32062
3577 [1.9ws]: https://github.com/rust-lang/rust/pull/29734
3578 [RFC 1270]: https://github.com/rust-lang/rfcs/blob/master/text/1270-deprecation.md
3579 [`<*const T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
3580 [`<*mut T>::as_mut`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_mut
3581 [`<*mut T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
3582 [`slice::copy_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.copy_from_slice
3583 [`AsciiExt::make_ascii_lowercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_lowercase
3584 [`AsciiExt::make_ascii_uppercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_uppercase
3585 [`BTreeSet::get`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.get
3586 [`BTreeSet::replace`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.replace
3587 [`BTreeSet::take`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.take
3588 [`CommandExt::exec`]: http://doc.rust-lang.org/nightly/std/os/unix/process/trait.CommandExt.html#tymethod.exec
3589 [`File::try_clone`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html#method.try_clone
3590 [`HashMap::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.hasher
3591 [`HashSet::get`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.get
3592 [`HashSet::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.hasher
3593 [`HashSet::replace`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.replace
3594 [`HashSet::take`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.take
3595 [`JoinHandleExt::as_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.as_pthread_t
3596 [`JoinHandleExt::into_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.into_pthread_t
3597 [`JoinHandleExt`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html
3598 [`OpenOptions::create_new`]: http://doc.rust-lang.org/nightly/std/fs/struct.OpenOptions.html#method.create_new
3599 [`OsStr::is_empty`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.is_empty
3600 [`OsStr::len`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.len
3601 [`OsString::capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.capacity
3602 [`OsString::clear`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.clear
3603 [`OsString::reserve_exact`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve_exact
3604 [`OsString::reserve`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve
3605 [`OsString::with_capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.with_capacity
3606 [`RawPthread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/type.RawPthread.html
3607 [`SocketAddr::set_ip`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_ip
3608 [`SocketAddr::set_port`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_port
3609 [`SocketAddrV4::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_ip
3610 [`SocketAddrV4::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_port
3611 [`SocketAddrV6::set_flowinfo`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_flowinfo
3612 [`SocketAddrV6::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_ip
3613 [`SocketAddrV6::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_port
3614 [`SocketAddrV6::set_scope_id`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_scope_id
3615 [`TcpListener::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
3616 [`TcpListener::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
3617 [`TcpListener::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
3618 [`TcpListener::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
3619 [`TcpListener::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
3620 [`TcpListener::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
3621 [`TcpStream::nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.nodelay
3622 [`TcpStream::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
3623 [`TcpStream::set_nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nodelay
3624 [`TcpStream::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
3625 [`TcpStream::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
3626 [`TcpStream::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
3627 [`TcpStream::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
3628 [`TcpStream::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
3629 [`UdpSocket::broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.broadcast
3630 [`UdpSocket::connect`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.connect
3631 [`UdpSocket::join_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v4
3632 [`UdpSocket::join_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v6
3633 [`UdpSocket::leave_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v4
3634 [`UdpSocket::leave_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v6
3635 [`UdpSocket::multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v4
3636 [`UdpSocket::multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v6
3637 [`UdpSocket::multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v4
3638 [`UdpSocket::multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v6
3639 [`UdpSocket::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.only_v6
3640 [`UdpSocket::recv`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.recv
3641 [`UdpSocket::send`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.send
3642 [`UdpSocket::set_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_broadcast
3643 [`UdpSocket::set_multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v4
3644 [`UdpSocket::set_multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v6
3645 [`UdpSocket::set_multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v4
3646 [`UdpSocket::set_multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v6
3647 [`UdpSocket::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_nonblocking
3648 [`UdpSocket::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_only_v6
3649 [`UdpSocket::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_ttl
3650 [`UdpSocket::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.take_error
3651 [`UdpSocket::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.ttl
3652 [`char::DecodeUtf16Error::unpaired_surrogate`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html#method.unpaired_surrogate
3653 [`char::DecodeUtf16Error`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html
3654 [`char::DecodeUtf16`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16.html
3655 [`char::decode_utf16`]: http://doc.rust-lang.org/nightly/std/char/fn.decode_utf16.html
3656 [`ptr::read_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.read_volatile.html
3657 [`ptr::write_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.write_volatile.html
3658 [`std::os::unix::thread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/index.html
3659 [`std::panic::AssertUnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/struct.AssertUnwindSafe.html
3660 [`std::panic::UnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/trait.UnwindSafe.html
3661 [`std::panic::catch_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.catch_unwind.html
3662 [`std::panic::resume_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.resume_unwind.html
3663 [`std::panic`]: http://doc.rust-lang.org/nightly/std/panic/index.html
3664 [`str::is_char_boundary`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.is_char_boundary
3667 Version 1.8.0 (2016-04-14)
3668 ==========================
3673 * Rust supports overloading of compound assignment statements like
3674 `+=` by implementing the [`AddAssign`], [`SubAssign`],
3675 [`MulAssign`], [`DivAssign`], [`RemAssign`], [`BitAndAssign`],
3676 [`BitOrAssign`], [`BitXorAssign`], [`ShlAssign`], or [`ShrAssign`]
3678 * Empty structs can be defined with braces, as in `struct Foo { }`, in
3679 addition to the non-braced form, `struct Foo;`. [RFC 218].
3685 * [`str::encode_utf16`][] (renamed from `utf16_units`)
3686 * [`str::EncodeUtf16`][] (renamed from `Utf16Units`)
3689 * [`ptr::drop_in_place`]
3691 * [`time::SystemTime`]
3693 * [`Instant::duration_since`][] (renamed from `duration_from_earlier`)
3694 * [`Instant::elapsed`]
3695 * [`SystemTime::now`]
3696 * [`SystemTime::duration_since`][] (renamed from `duration_from_earlier`)
3697 * [`SystemTime::elapsed`]
3698 * Various `Add`/`Sub` impls for `Time` and `SystemTime`
3699 * [`SystemTimeError`]
3700 * [`SystemTimeError::duration`]
3701 * Various impls for `SystemTimeError`
3703 * [`AddAssign`], [`SubAssign`], [`MulAssign`], [`DivAssign`],
3704 [`RemAssign`], [`BitAndAssign`], [`BitOrAssign`],
3705 [`BitXorAssign`], [`ShlAssign`], [`ShrAssign`].
3706 * [The `write!` and `writeln!` macros correctly emit errors if any of
3707 their arguments can't be formatted][1.8w].
3708 * [Various I/O functions support large files on 32-bit Linux][1.8l].
3709 * [The Unix-specific `raw` modules, which contain a number of
3710 redefined C types are deprecated][1.8r], including `os::raw::unix`,
3711 `os::raw::macos`, and `os::raw::linux`. These modules defined types
3712 such as `ino_t` and `dev_t`. The inconsistency of these definitions
3713 across platforms was making it difficult to implement `std`
3714 correctly. Those that need these definitions should use the `libc`
3716 * The Unix-specific `MetadataExt` traits, including
3717 `os::unix::fs::MetadataExt`, which expose values such as inode
3718 numbers [no longer return platform-specific types][1.8r], but
3719 instead return widened integers. [RFC 1415].
3720 * [`btree_set::{IntoIter, Iter, Range}` are covariant][1.8cv].
3721 * [Atomic loads and stores are not volatile][1.8a].
3722 * [All types in `sync::mpsc` implement `fmt::Debug`][1.8mp].
3727 * [Inlining hash functions lead to a 3% compile-time improvement in
3728 some workloads][1.8h].
3729 * When using jemalloc, its symbols are [unprefixed so that it
3730 overrides the libc malloc implementation][1.8h]. This means that for
3731 rustc, LLVM is now using jemalloc, which results in a 6%
3732 compile-time improvement on a specific workload.
3733 * [Avoid quadratic growth in function size due to cleanups][1.8cu].
3738 * [32-bit MSVC builds finally implement unwinding][1.8ms].
3739 i686-pc-windows-msvc is now considered a tier-1 platform.
3740 * [The `--print targets` flag prints a list of supported targets][1.8t].
3741 * [The `--print cfg` flag prints the `cfg`s defined for the current
3743 * [`rustc` can be built with an new Cargo-based build system, written
3744 in Rust][1.8b]. It will eventually replace Rust's Makefile-based
3745 build system. To enable it configure with `configure --rustbuild`.
3746 * [Errors for non-exhaustive `match` patterns now list up to 3 missing
3747 variants while also indicating the total number of missing variants
3748 if more than 3][1.8m].
3749 * [Executable stacks are disabled on Linux and BSD][1.8nx].
3750 * The Rust Project now publishes binary releases of the standard
3751 library for a number of tier-2 targets:
3752 `armv7-unknown-linux-gnueabihf`, `powerpc-unknown-linux-gnu`,
3753 `powerpc64-unknown-linux-gnu`, `powerpc64le-unknown-linux-gnu`
3754 `x86_64-rumprun-netbsd`. These can be installed with
3755 tools such as [multirust][1.8mr].
3760 * [`cargo init` creates a new Cargo project in the current
3761 directory][1.8ci]. It is otherwise like `cargo new`.
3762 * [Cargo has configuration keys for `-v` and
3763 `--color`][1.8cc]. `verbose` and `color`, respectively, go in the
3764 `[term]` section of `.cargo/config`.
3765 * [Configuration keys that evaluate to strings or integers can be set
3766 via environment variables][1.8ce]. For example the `build.jobs` key
3767 can be set via `CARGO_BUILD_JOBS`. Environment variables take
3768 precedence over config files.
3769 * [Target-specific dependencies support Rust `cfg` syntax for
3770 describing targets][1.8cfg] so that dependencies for multiple
3771 targets can be specified together. [RFC 1361].
3772 * [The environment variables `CARGO_TARGET_ROOT`, `RUSTC`, and
3773 `RUSTDOC` take precedence over the `build.target-dir`,
3774 `build.rustc`, and `build.rustdoc` configuration values][1.8cv].
3775 * [The child process tree is killed on Windows when Cargo is
3777 * [The `build.target` configuration value sets the target platform,
3778 like `--target`][1.8ct].
3783 * [Unstable compiler flags have been further restricted][1.8u]. Since
3784 1.0 `-Z` flags have been considered unstable, and other flags that
3785 were considered unstable additionally required passing `-Z
3786 unstable-options` to access. Unlike unstable language and library
3787 features though, these options have been accessible on the stable
3788 release channel. Going forward, *new unstable flags will not be
3789 available on the stable release channel*, and old unstable flags
3790 will warn about their usage. In the future, all unstable flags will
3791 be unavailable on the stable release channel.
3792 * [It is no longer possible to `match` on empty enum variants using
3793 the `Variant(..)` syntax][1.8v]. This has been a warning since 1.6.
3794 * The Unix-specific `MetadataExt` traits, including
3795 `os::unix::fs::MetadataExt`, which expose values such as inode
3796 numbers [no longer return platform-specific types][1.8r], but
3797 instead return widened integers. [RFC 1415].
3798 * [Modules sourced from the filesystem cannot appear within arbitrary
3799 blocks, but only within other modules][1.8mf].
3800 * [`--cfg` compiler flags are parsed strictly as identifiers][1.8c].
3801 * On Unix, [stack overflow triggers a runtime abort instead of a
3803 * [`Command::spawn` and its equivalents return an error if any of
3804 its command-line arguments contain interior `NUL`s][1.8n].
3805 * [Tuple and unit enum variants from other crates are in the type
3807 * [On Windows `rustc` emits `.lib` files for the `staticlib` library
3808 type instead of `.a` files][1.8st]. Additionally, for the MSVC
3809 toolchain, `rustc` emits import libraries named `foo.dll.lib`
3810 instead of `foo.lib`.
3813 [1.8a]: https://github.com/rust-lang/rust/pull/30962
3814 [1.8b]: https://github.com/rust-lang/rust/pull/31123
3815 [1.8c]: https://github.com/rust-lang/rust/pull/31530
3816 [1.8cc]: https://github.com/rust-lang/cargo/pull/2397
3817 [1.8ce]: https://github.com/rust-lang/cargo/pull/2398
3818 [1.8cf]: https://github.com/rust-lang/rust/pull/31278
3819 [1.8cfg]: https://github.com/rust-lang/cargo/pull/2328
3820 [1.8ci]: https://github.com/rust-lang/cargo/pull/2081
3821 [1.8ck]: https://github.com/rust-lang/cargo/pull/2370
3822 [1.8ct]: https://github.com/rust-lang/cargo/pull/2335
3823 [1.8cu]: https://github.com/rust-lang/rust/pull/31390
3824 [1.8cv]: https://github.com/rust-lang/cargo/issues/2365
3825 [1.8cv]: https://github.com/rust-lang/rust/pull/30998
3826 [1.8h]: https://github.com/rust-lang/rust/pull/31460
3827 [1.8l]: https://github.com/rust-lang/rust/pull/31668
3828 [1.8m]: https://github.com/rust-lang/rust/pull/31020
3829 [1.8mf]: https://github.com/rust-lang/rust/pull/31534
3830 [1.8mp]: https://github.com/rust-lang/rust/pull/30894
3831 [1.8mr]: https://users.rust-lang.org/t/multirust-0-8-with-cross-std-installation/4901
3832 [1.8ms]: https://github.com/rust-lang/rust/pull/30448
3833 [1.8n]: https://github.com/rust-lang/rust/pull/31056
3834 [1.8nx]: https://github.com/rust-lang/rust/pull/30859
3835 [1.8r]: https://github.com/rust-lang/rust/pull/31551
3836 [1.8so]: https://github.com/rust-lang/rust/pull/31333
3837 [1.8st]: https://github.com/rust-lang/rust/pull/29520
3838 [1.8t]: https://github.com/rust-lang/rust/pull/31358
3839 [1.8tn]: https://github.com/rust-lang/rust/pull/30882
3840 [1.8u]: https://github.com/rust-lang/rust/pull/31793
3841 [1.8v]: https://github.com/rust-lang/rust/pull/31757
3842 [1.8w]: https://github.com/rust-lang/rust/pull/31904
3843 [RFC 1361]: https://github.com/rust-lang/rfcs/blob/master/text/1361-cargo-cfg-dependencies.md
3844 [RFC 1415]: https://github.com/rust-lang/rfcs/blob/master/text/1415-trim-std-os.md
3845 [RFC 218]: https://github.com/rust-lang/rfcs/blob/master/text/0218-empty-struct-with-braces.md
3846 [RFC 953]: https://github.com/rust-lang/rfcs/blob/master/text/0953-op-assign.md
3847 [`AddAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.AddAssign.html
3848 [`BitAndAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitAndAssign.html
3849 [`BitOrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitOrAssign.html
3850 [`BitXorAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitXorAssign.html
3851 [`DivAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.DivAssign.html
3852 [`Instant::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.duration_since
3853 [`Instant::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.elapsed
3854 [`Instant::now`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.now
3855 [`MulAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.MulAssign.html
3856 [`Ref::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.Ref.html#method.map
3857 [`RefMut::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.RefMut.html#method.map
3858 [`RemAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.RemAssign.html
3859 [`ShlAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShlAssign.html
3860 [`ShrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShrAssign.html
3861 [`SubAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.SubAssign.html
3862 [`SystemTime::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.duration_since
3863 [`SystemTime::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.elapsed
3864 [`SystemTime::now`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.now
3865 [`SystemTimeError::duration`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html#method.duration
3866 [`SystemTimeError`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html
3867 [`UNIX_EPOCH`]: http://doc.rust-lang.org/nightly/std/time/constant.UNIX_EPOCH.html
3868 [`ptr::drop_in_place`]: http://doc.rust-lang.org/nightly/std/ptr/fn.drop_in_place.html
3869 [`str::EncodeUtf16`]: http://doc.rust-lang.org/nightly/std/str/struct.EncodeUtf16.html
3870 [`str::encode_utf16`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.encode_utf16
3871 [`time::Instant`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html
3872 [`time::SystemTime`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html
3875 Version 1.7.0 (2016-03-03)
3876 ==========================
3883 * [`Path::strip_prefix`][] (renamed from relative_from)
3884 * [`path::StripPrefixError`][] (new error type returned from strip_prefix)
3886 * [`Ipv4Addr::is_loopback`]
3887 * [`Ipv4Addr::is_private`]
3888 * [`Ipv4Addr::is_link_local`]
3889 * [`Ipv4Addr::is_multicast`]
3890 * [`Ipv4Addr::is_broadcast`]
3891 * [`Ipv4Addr::is_documentation`]
3893 * [`Ipv6Addr::is_unspecified`]
3894 * [`Ipv6Addr::is_loopback`]
3895 * [`Ipv6Addr::is_multicast`]
3898 * [`Vec::as_mut_slice`]
3900 * [`String::as_str`]
3901 * [`String::as_mut_str`]
3903 * `<[T]>::`[`clone_from_slice`], which now requires the two slices to
3905 * `<[T]>::`[`sort_by_key`]
3906 * checked, saturated, and overflowing operations
3907 * [`i32::checked_rem`], [`i32::checked_neg`], [`i32::checked_shl`], [`i32::checked_shr`]
3908 * [`i32::saturating_mul`]
3909 * [`i32::overflowing_add`], [`i32::overflowing_sub`], [`i32::overflowing_mul`], [`i32::overflowing_div`]
3910 * [`i32::overflowing_rem`], [`i32::overflowing_neg`], [`i32::overflowing_shl`], [`i32::overflowing_shr`]
3911 * [`u32::checked_rem`], [`u32::checked_neg`], [`u32::checked_shl`], [`u32::checked_shl`]
3912 * [`u32::saturating_mul`]
3913 * [`u32::overflowing_add`], [`u32::overflowing_sub`], [`u32::overflowing_mul`], [`u32::overflowing_div`]
3914 * [`u32::overflowing_rem`], [`u32::overflowing_neg`], [`u32::overflowing_shl`], [`u32::overflowing_shr`]
3915 * and checked, saturated, and overflowing operations for other primitive types
3917 * [`ffi::IntoStringError`]
3918 * [`CString::into_string`]
3919 * [`CString::into_bytes`]
3920 * [`CString::into_bytes_with_nul`]
3921 * `From<CString> for Vec<u8>`
3923 * [`IntoStringError::into_cstring`]
3924 * [`IntoStringError::utf8_error`]
3925 * `Error for IntoStringError`
3927 * [`std::hash::BuildHasher`]
3928 * [`BuildHasher::Hasher`]
3929 * [`BuildHasher::build_hasher`]
3930 * [`std::hash::BuildHasherDefault`]
3931 * [`HashMap::with_hasher`]
3932 * [`HashMap::with_capacity_and_hasher`]
3933 * [`HashSet::with_hasher`]
3934 * [`HashSet::with_capacity_and_hasher`]
3935 * [`std::collections::hash_map::RandomState`]
3936 * [`RandomState::new`]
3937 * [Validating UTF-8 is faster by a factor of between 7 and 14x for
3938 ASCII input][1.7utf8]. This means that creating `String`s and `str`s
3939 from bytes is faster.
3940 * [The performance of `LineWriter` (and thus `io::stdout`) was
3941 improved by using `memchr` to search for newlines][1.7m].
3942 * [`f32::to_degrees` and `f32::to_radians` are stable][1.7f]. The
3943 `f64` variants were stabilized previously.
3944 * [`BTreeMap` was rewritten to use less memory and improve the performance
3945 of insertion and iteration, the latter by as much as 5x][1.7bm].
3946 * [`BTreeSet` and its iterators, `Iter`, `IntoIter`, and `Range` are
3947 covariant over their contained type][1.7bt].
3948 * [`LinkedList` and its iterators, `Iter` and `IntoIter` are covariant
3949 over their contained type][1.7ll].
3950 * [`str::replace` now accepts a `Pattern`][1.7rp], like other string
3952 * [`Any` is implemented for unsized types][1.7a].
3953 * [`Hash` is implemented for `Duration`][1.7h].
3958 * [When running tests with `--test`, rustdoc will pass `--cfg`
3959 arguments to the compiler][1.7dt].
3960 * [The compiler is built with RPATH information by default][1.7rpa].
3961 This means that it will be possible to run `rustc` when installed in
3962 unusual configurations without configuring the dynamic linker search
3964 * [`rustc` passes `--enable-new-dtags` to GNU ld][1.7dta]. This makes
3965 any RPATH entries (emitted with `-C rpath`) *not* take precedence
3966 over `LD_LIBRARY_PATH`.
3971 * [`cargo rustc` accepts a `--profile` flag that runs `rustc` under
3972 any of the compilation profiles, 'dev', 'bench', or 'test'][1.7cp].
3973 * [The `rerun-if-changed` build script directive no longer causes the
3974 build script to incorrectly run twice in certain scenarios][1.7rr].
3979 * Soundness fixes to the interactions between associated types and
3980 lifetimes, specified in [RFC 1214], [now generate errors][1.7sf] for
3981 code that violates the new rules. This is a significant change that
3982 is known to break existing code, so it has emitted warnings for the
3983 new error cases since 1.4 to give crate authors time to adapt. The
3984 details of what is changing are subtle; read the RFC for more.
3985 * [Several bugs in the compiler's visibility calculations were
3986 fixed][1.7v]. Since this was found to break significant amounts of
3987 code, the new errors will be emitted as warnings for several release
3988 cycles, under the `private_in_public` lint.
3989 * Defaulted type parameters were accidentally accepted in positions
3990 that were not intended. In this release, [defaulted type parameters
3991 appearing outside of type definitions will generate a
3992 warning][1.7d], which will become an error in future releases.
3993 * [Parsing "." as a float results in an error instead of 0][1.7p].
3994 That is, `".".parse::<f32>()` returns `Err`, not `Ok(0.0)`.
3995 * [Borrows of closure parameters may not outlive the closure][1.7bc].
3997 [1.7a]: https://github.com/rust-lang/rust/pull/30928
3998 [1.7bc]: https://github.com/rust-lang/rust/pull/30341
3999 [1.7bm]: https://github.com/rust-lang/rust/pull/30426
4000 [1.7bt]: https://github.com/rust-lang/rust/pull/30998
4001 [1.7cp]: https://github.com/rust-lang/cargo/pull/2224
4002 [1.7d]: https://github.com/rust-lang/rust/pull/30724
4003 [1.7dt]: https://github.com/rust-lang/rust/pull/30372
4004 [1.7dta]: https://github.com/rust-lang/rust/pull/30394
4005 [1.7f]: https://github.com/rust-lang/rust/pull/30672
4006 [1.7h]: https://github.com/rust-lang/rust/pull/30818
4007 [1.7ll]: https://github.com/rust-lang/rust/pull/30663
4008 [1.7m]: https://github.com/rust-lang/rust/pull/30381
4009 [1.7p]: https://github.com/rust-lang/rust/pull/30681
4010 [1.7rp]: https://github.com/rust-lang/rust/pull/29498
4011 [1.7rpa]: https://github.com/rust-lang/rust/pull/30353
4012 [1.7rr]: https://github.com/rust-lang/cargo/pull/2279
4013 [1.7sf]: https://github.com/rust-lang/rust/pull/30389
4014 [1.7utf8]: https://github.com/rust-lang/rust/pull/30740
4015 [1.7v]: https://github.com/rust-lang/rust/pull/29973
4016 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
4017 [`BuildHasher::Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
4018 [`BuildHasher::build_hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html#tymethod.build_hasher
4019 [`CString::into_bytes_with_nul`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes_with_nul
4020 [`CString::into_bytes`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes
4021 [`CString::into_string`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_string
4022 [`HashMap::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_capacity_and_hasher
4023 [`HashMap::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_hasher
4024 [`HashSet::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_capacity_and_hasher
4025 [`HashSet::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_hasher
4026 [`IntoStringError::into_cstring`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.into_cstring
4027 [`IntoStringError::utf8_error`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.utf8_error
4028 [`Ipv4Addr::is_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_broadcast
4029 [`Ipv4Addr::is_documentation`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_documentation
4030 [`Ipv4Addr::is_link_local`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_link_local
4031 [`Ipv4Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_loopback
4032 [`Ipv4Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_multicast
4033 [`Ipv4Addr::is_private`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_private
4034 [`Ipv6Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_loopback
4035 [`Ipv6Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_multicast
4036 [`Ipv6Addr::is_unspecified`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_unspecified
4037 [`Path::strip_prefix`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.strip_prefix
4038 [`RandomState::new`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html#method.new
4039 [`String::as_mut_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_mut_str
4040 [`String::as_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_str
4041 [`Vec::as_mut_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_mut_slice
4042 [`Vec::as_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_slice
4043 [`clone_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.clone_from_slice
4044 [`ffi::IntoStringError`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html
4045 [`i32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_neg
4046 [`i32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_rem
4047 [`i32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shl
4048 [`i32::checked_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shr
4049 [`i32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_add
4050 [`i32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_div
4051 [`i32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_mul
4052 [`i32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_neg
4053 [`i32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_rem
4054 [`i32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shl
4055 [`i32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shr
4056 [`i32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_sub
4057 [`i32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.saturating_mul
4058 [`path::StripPrefixError`]: http://doc.rust-lang.org/nightly/std/path/struct.StripPrefixError.html
4059 [`sort_by_key`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.sort_by_key
4060 [`std::collections::hash_map::RandomState`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html
4061 [`std::hash::BuildHasherDefault`]: http://doc.rust-lang.org/nightly/std/hash/struct.BuildHasherDefault.html
4062 [`std::hash::BuildHasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html
4063 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
4064 [`u32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_rem
4065 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
4066 [`u32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_shl
4067 [`u32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_add
4068 [`u32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_div
4069 [`u32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_mul
4070 [`u32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_neg
4071 [`u32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_rem
4072 [`u32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shl
4073 [`u32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shr
4074 [`u32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_sub
4075 [`u32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.saturating_mul
4078 Version 1.6.0 (2016-01-21)
4079 ==========================
4084 * The `#![no_std]` attribute causes a crate to not be linked to the
4085 standard library, but only the [core library][1.6co], as described
4086 in [RFC 1184]. The core library defines common types and traits but
4087 has no platform dependencies whatsoever, and is the basis for Rust
4088 software in environments that cannot support a full port of the
4089 standard library, such as operating systems. Most of the core
4090 library is now stable.
4096 [`Read::read_exact`],
4097 [`ErrorKind::UnexpectedEof`][] (renamed from `UnexpectedEOF`),
4098 [`fs::DirBuilder`], [`fs::DirBuilder::new`],
4099 [`fs::DirBuilder::recursive`], [`fs::DirBuilder::create`],
4100 [`os::unix::fs::DirBuilderExt`],
4101 [`os::unix::fs::DirBuilderExt::mode`], [`vec::Drain`],
4102 [`vec::Vec::drain`], [`string::Drain`], [`string::String::drain`],
4103 [`vec_deque::Drain`], [`vec_deque::VecDeque::drain`],
4104 [`collections::hash_map::Drain`],
4105 [`collections::hash_map::HashMap::drain`],
4106 [`collections::hash_set::Drain`],
4107 [`collections::hash_set::HashSet::drain`],
4108 [`collections::binary_heap::Drain`],
4109 [`collections::binary_heap::BinaryHeap::drain`],
4110 [`Vec::extend_from_slice`][] (renamed from `push_all`),
4111 [`Mutex::get_mut`], [`Mutex::into_inner`], [`RwLock::get_mut`],
4112 [`RwLock::into_inner`],
4113 [`Iterator::min_by_key`][] (renamed from `min_by`),
4114 [`Iterator::max_by_key`][] (renamed from `max_by`).
4115 * The [core library][1.6co] is stable, as are most of its APIs.
4116 * [The `assert_eq!` macro supports arguments that don't implement
4117 `Sized`][1.6ae], such as arrays. In this way it behaves more like
4119 * Several timer functions that take duration in milliseconds [are
4120 deprecated in favor of those that take `Duration`][1.6ms]. These
4121 include `Condvar::wait_timeout_ms`, `thread::sleep_ms`, and
4122 `thread::park_timeout_ms`.
4123 * The algorithm by which `Vec` reserves additional elements was
4124 [tweaked to not allocate excessive space][1.6a] while still growing
4126 * `From` conversions are [implemented from integers to floats][1.6f]
4127 in cases where the conversion is lossless. Thus they are not
4128 implemented for 32-bit ints to `f32`, nor for 64-bit ints to `f32`
4129 or `f64`. They are also not implemented for `isize` and `usize`
4130 because the implementations would be platform-specific. `From` is
4131 also implemented from `f32` to `f64`.
4132 * `From<&Path>` and `From<PathBuf>` are implemented for `Cow<Path>`.
4133 * `From<T>` is implemented for `Box<T>`, `Rc<T>` and `Arc<T>`.
4134 * `IntoIterator` is implemented for `&PathBuf` and `&Path`.
4135 * [`BinaryHeap` was refactored][1.6bh] for modest performance
4137 * Sorting slices that are already sorted [is 50% faster in some
4143 * Cargo will look in `$CARGO_HOME/bin` for subcommands [by default][1.6c].
4144 * Cargo build scripts can specify their dependencies by emitting the
4145 [`rerun-if-changed`][1.6rr] key.
4146 * crates.io will reject publication of crates with dependencies that
4147 have a wildcard version constraint. Crates with wildcard
4148 dependencies were seen to cause a variety of problems, as described
4149 in [RFC 1241]. Since 1.5 publication of such crates has emitted a
4151 * `cargo clean` [accepts a `--release` flag][1.6cc] to clean the
4152 release folder. A variety of artifacts that Cargo failed to clean
4153 are now correctly deleted.
4158 * The `unreachable_code` lint [warns when a function call's argument
4160 * The parser indicates [failures that may be caused by
4161 confusingly-similar Unicode characters][1.6uc]
4162 * Certain macro errors [are reported at definition time][1.6m], not
4168 * The compiler no longer makes use of the [`RUST_PATH`][1.6rp]
4169 environment variable when locating crates. This was a pre-cargo
4170 feature for integrating with the package manager that was
4171 accidentally never removed.
4172 * [A number of bugs were fixed in the privacy checker][1.6p] that
4173 could cause previously-accepted code to break.
4174 * [Modules and unit/tuple structs may not share the same name][1.6ts].
4175 * [Bugs in pattern matching unit structs were fixed][1.6us]. The tuple
4176 struct pattern syntax (`Foo(..)`) can no longer be used to match
4177 unit structs. This is a warning now, but will become an error in
4178 future releases. Patterns that share the same name as a const are
4180 * A bug was fixed that causes [rustc not to apply default type
4181 parameters][1.6xc] when resolving certain method implementations of
4182 traits defined in other crates.
4184 [1.6a]: https://github.com/rust-lang/rust/pull/29454
4185 [1.6ae]: https://github.com/rust-lang/rust/pull/29770
4186 [1.6bh]: https://github.com/rust-lang/rust/pull/29811
4187 [1.6c]: https://github.com/rust-lang/cargo/pull/2192
4188 [1.6cc]: https://github.com/rust-lang/cargo/pull/2131
4189 [1.6co]: http://doc.rust-lang.org/core/index.html
4190 [1.6dv]: https://github.com/rust-lang/rust/pull/30000
4191 [1.6f]: https://github.com/rust-lang/rust/pull/29129
4192 [1.6m]: https://github.com/rust-lang/rust/pull/29828
4193 [1.6ms]: https://github.com/rust-lang/rust/pull/29604
4194 [1.6p]: https://github.com/rust-lang/rust/pull/29726
4195 [1.6rp]: https://github.com/rust-lang/rust/pull/30034
4196 [1.6rr]: https://github.com/rust-lang/cargo/pull/2134
4197 [1.6s]: https://github.com/rust-lang/rust/pull/29675
4198 [1.6ts]: https://github.com/rust-lang/rust/issues/21546
4199 [1.6uc]: https://github.com/rust-lang/rust/pull/29837
4200 [1.6us]: https://github.com/rust-lang/rust/pull/29383
4201 [1.6xc]: https://github.com/rust-lang/rust/issues/30123
4202 [RFC 1184]: https://github.com/rust-lang/rfcs/blob/master/text/1184-stabilize-no_std.md
4203 [RFC 1241]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
4204 [`ErrorKind::UnexpectedEof`]: http://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html#variant.UnexpectedEof
4205 [`Iterator::max_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.max_by_key
4206 [`Iterator::min_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.min_by_key
4207 [`Mutex::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.get_mut
4208 [`Mutex::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.into_inner
4209 [`Read::read_exact`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_exact
4210 [`RwLock::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.get_mut
4211 [`RwLock::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.into_inner
4212 [`Vec::extend_from_slice`]: http://doc.rust-lang.org/nightly/collections/vec/struct.Vec.html#method.extend_from_slice
4213 [`collections::binary_heap::BinaryHeap::drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.BinaryHeap.html#method.drain
4214 [`collections::binary_heap::Drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.Drain.html
4215 [`collections::hash_map::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.Drain.html
4216 [`collections::hash_map::HashMap::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.HashMap.html#method.drain
4217 [`collections::hash_set::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.Drain.html
4218 [`collections::hash_set::HashSet::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.HashSet.html#method.drain
4219 [`fs::DirBuilder::create`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.create
4220 [`fs::DirBuilder::new`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.new
4221 [`fs::DirBuilder::recursive`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.recursive
4222 [`fs::DirBuilder`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html
4223 [`os::unix::fs::DirBuilderExt::mode`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html#tymethod.mode
4224 [`os::unix::fs::DirBuilderExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html
4225 [`string::Drain`]: http://doc.rust-lang.org/nightly/std/string/struct.Drain.html
4226 [`string::String::drain`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.drain
4227 [`vec::Drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Drain.html
4228 [`vec::Vec::drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.drain
4229 [`vec_deque::Drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.Drain.html
4230 [`vec_deque::VecDeque::drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.VecDeque.html#method.drain
4233 Version 1.5.0 (2015-12-10)
4234 ==========================
4236 * ~700 changes, numerous bugfixes
4242 [`BinaryHeap::from`], [`BinaryHeap::into_sorted_vec`],
4243 [`BinaryHeap::into_vec`], [`Condvar::wait_timeout`],
4244 [`FileTypeExt::is_block_device`], [`FileTypeExt::is_char_device`],
4245 [`FileTypeExt::is_fifo`], [`FileTypeExt::is_socket`],
4246 [`FileTypeExt`], [`Formatter::alternate`], [`Formatter::fill`],
4247 [`Formatter::precision`], [`Formatter::sign_aware_zero_pad`],
4248 [`Formatter::sign_minus`], [`Formatter::sign_plus`],
4249 [`Formatter::width`], [`Iterator::cmp`], [`Iterator::eq`],
4250 [`Iterator::ge`], [`Iterator::gt`], [`Iterator::le`],
4251 [`Iterator::lt`], [`Iterator::ne`], [`Iterator::partial_cmp`],
4252 [`Path::canonicalize`], [`Path::exists`], [`Path::is_dir`],
4253 [`Path::is_file`], [`Path::metadata`], [`Path::read_dir`],
4254 [`Path::read_link`], [`Path::symlink_metadata`],
4255 [`Utf8Error::valid_up_to`], [`Vec::resize`],
4256 [`VecDeque::as_mut_slices`], [`VecDeque::as_slices`],
4257 [`VecDeque::insert`], [`VecDeque::shrink_to_fit`],
4258 [`VecDeque::swap_remove_back`], [`VecDeque::swap_remove_front`],
4259 [`slice::split_first_mut`], [`slice::split_first`],
4260 [`slice::split_last_mut`], [`slice::split_last`],
4261 [`char::from_u32_unchecked`], [`fs::canonicalize`],
4262 [`str::MatchIndices`], [`str::RMatchIndices`],
4263 [`str::match_indices`], [`str::rmatch_indices`],
4264 [`str::slice_mut_unchecked`], [`string::ParseError`].
4265 * Rust applications hosted on crates.io can be installed locally to
4266 `~/.cargo/bin` with the [`cargo install`] command. Among other
4267 things this makes it easier to augment Cargo with new subcommands:
4268 when a binary named e.g. `cargo-foo` is found in `$PATH` it can be
4269 invoked as `cargo foo`.
4270 * Crates with wildcard (`*`) dependencies will [emit warnings when
4271 published][1.5w]. In 1.6 it will no longer be possible to publish
4272 crates with wildcard dependencies.
4277 * The rules determining when a particular lifetime must outlive
4278 a particular value (known as '[dropck]') have been [modified
4279 to not rely on parametricity][1.5p].
4280 * [Implementations of `AsRef` and `AsMut` were added to `Box`, `Rc`,
4281 and `Arc`][1.5a]. Because these smart pointer types implement
4282 `Deref`, this causes breakage in cases where the interior type
4283 contains methods of the same name.
4284 * [Correct a bug in Rc/Arc][1.5c] that caused [dropck] to be unaware
4285 that they could drop their content. Soundness fix.
4286 * All method invocations are [properly checked][1.5wf1] for
4287 [well-formedness][1.5wf2]. Soundness fix.
4288 * Traits whose supertraits contain `Self` are [not object
4289 safe][1.5o]. Soundness fix.
4290 * Target specifications support a [`no_default_libraries`][1.5nd]
4291 setting that controls whether `-nodefaultlibs` is passed to the
4292 linker, and in turn the `is_like_windows` setting no longer affects
4293 the `-nodefaultlibs` flag.
4294 * `#[derive(Show)]`, long-deprecated, [has been removed][1.5ds].
4295 * The `#[inline]` and `#[repr]` attributes [can only appear
4296 in valid locations][1.5at].
4297 * Native libraries linked from the local crate are [passed to
4298 the linker before native libraries from upstream crates][1.5nl].
4299 * Two rarely-used attributes, `#[no_debug]` and
4300 `#[omit_gdb_pretty_printer_section]` [are feature gated][1.5fg].
4301 * Negation of unsigned integers, which has been a warning for
4302 several releases, [is now behind a feature gate and will
4303 generate errors][1.5nu].
4304 * The parser accidentally accepted visibility modifiers on
4305 enum variants, a bug [which has been fixed][1.5ev].
4306 * [A bug was fixed that allowed `use` statements to import unstable
4312 * When evaluating expressions at compile-time that are not
4313 compile-time constants (const-evaluating expressions in non-const
4314 contexts), incorrect code such as overlong bitshifts and arithmetic
4315 overflow will [generate a warning instead of an error][1.5ce],
4316 delaying the error until runtime. This will allow the
4317 const-evaluator to be expanded in the future backwards-compatibly.
4318 * The `improper_ctypes` lint [no longer warns about using `isize` and
4319 `usize` in FFI][1.5ict].
4324 * `Arc<T>` and `Rc<T>` are [covariant with respect to `T` instead of
4326 * `Default` is [implemented for mutable slices][1.5d].
4327 * `FromStr` is [implemented for `SockAddrV4` and `SockAddrV6`][1.5s].
4328 * There are now `From` conversions [between floating point
4329 types][1.5f] where the conversions are lossless.
4330 * There are now `From` conversions [between integer types][1.5i] where
4331 the conversions are lossless.
4332 * [`fs::Metadata` implements `Clone`][1.5fs].
4333 * The `parse` method [accepts a leading "+" when parsing
4335 * [`AsMut` is implemented for `Vec`][1.5am].
4336 * The `clone_from` implementations for `String` and `BinaryHeap` [have
4337 been optimized][1.5cf] and no longer rely on the default impl.
4338 * The `extern "Rust"`, `extern "C"`, `unsafe extern "Rust"` and
4339 `unsafe extern "C"` function types now [implement `Clone`,
4340 `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and
4341 `fmt::Debug` for up to 12 arguments][1.5fp].
4342 * [Dropping `Vec`s is much faster in unoptimized builds when the
4343 element types don't implement `Drop`][1.5dv].
4344 * A bug that caused in incorrect behavior when [combining `VecDeque`
4345 with zero-sized types][1.5vdz] was resolved.
4346 * [`PartialOrd` for slices is faster][1.5po].
4351 * [Crate metadata size was reduced by 20%][1.5md].
4352 * [Improvements to code generation reduced the size of libcore by 3.3
4353 MB and rustc's memory usage by 18MB][1.5m].
4354 * [Improvements to deref translation increased performance in
4355 unoptimized builds][1.5dr].
4356 * Various errors in trait resolution [are deduplicated to only be
4357 reported once][1.5te].
4358 * Rust has preliminary [support for rumprun kernels][1.5rr].
4359 * Rust has preliminary [support for NetBSD on amd64][1.5na].
4361 [1.5use]: https://github.com/rust-lang/rust/pull/28364
4362 [1.5po]: https://github.com/rust-lang/rust/pull/28436
4363 [1.5ev]: https://github.com/rust-lang/rust/pull/28442
4364 [1.5nu]: https://github.com/rust-lang/rust/pull/28468
4365 [1.5dr]: https://github.com/rust-lang/rust/pull/28491
4366 [1.5vdz]: https://github.com/rust-lang/rust/pull/28494
4367 [1.5md]: https://github.com/rust-lang/rust/pull/28521
4368 [1.5fg]: https://github.com/rust-lang/rust/pull/28522
4369 [1.5dv]: https://github.com/rust-lang/rust/pull/28531
4370 [1.5na]: https://github.com/rust-lang/rust/pull/28543
4371 [1.5fp]: https://github.com/rust-lang/rust/pull/28560
4372 [1.5rr]: https://github.com/rust-lang/rust/pull/28593
4373 [1.5cf]: https://github.com/rust-lang/rust/pull/28602
4374 [1.5nl]: https://github.com/rust-lang/rust/pull/28605
4375 [1.5te]: https://github.com/rust-lang/rust/pull/28645
4376 [1.5at]: https://github.com/rust-lang/rust/pull/28650
4377 [1.5am]: https://github.com/rust-lang/rust/pull/28663
4378 [1.5m]: https://github.com/rust-lang/rust/pull/28778
4379 [1.5ict]: https://github.com/rust-lang/rust/pull/28779
4380 [1.5a]: https://github.com/rust-lang/rust/pull/28811
4381 [1.5pi]: https://github.com/rust-lang/rust/pull/28826
4382 [1.5ce]: https://github.com/rust-lang/rfcs/blob/master/text/1229-compile-time-asserts.md
4383 [1.5p]: https://github.com/rust-lang/rfcs/blob/master/text/1238-nonparametric-dropck.md
4384 [1.5i]: https://github.com/rust-lang/rust/pull/28921
4385 [1.5fs]: https://github.com/rust-lang/rust/pull/29021
4386 [1.5f]: https://github.com/rust-lang/rust/pull/29129
4387 [1.5ds]: https://github.com/rust-lang/rust/pull/29148
4388 [1.5s]: https://github.com/rust-lang/rust/pull/29190
4389 [1.5d]: https://github.com/rust-lang/rust/pull/29245
4390 [1.5o]: https://github.com/rust-lang/rust/pull/29259
4391 [1.5nd]: https://github.com/rust-lang/rust/pull/28578
4392 [1.5wf2]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
4393 [1.5wf1]: https://github.com/rust-lang/rust/pull/28669
4394 [dropck]: https://doc.rust-lang.org/nightly/nomicon/dropck.html
4395 [1.5c]: https://github.com/rust-lang/rust/pull/29110
4396 [1.5w]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
4397 [`cargo install`]: https://github.com/rust-lang/rfcs/blob/master/text/1200-cargo-install.md
4398 [`BinaryHeap::from`]: http://doc.rust-lang.org/nightly/std/convert/trait.From.html#method.from
4399 [`BinaryHeap::into_sorted_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_sorted_vec
4400 [`BinaryHeap::into_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_vec
4401 [`Condvar::wait_timeout`]: http://doc.rust-lang.org/nightly/std/sync/struct.Condvar.html#method.wait_timeout
4402 [`FileTypeExt::is_block_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_block_device
4403 [`FileTypeExt::is_char_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_char_device
4404 [`FileTypeExt::is_fifo`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_fifo
4405 [`FileTypeExt::is_socket`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_socket
4406 [`FileTypeExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html
4407 [`Formatter::alternate`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.alternate
4408 [`Formatter::fill`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.fill
4409 [`Formatter::precision`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.precision
4410 [`Formatter::sign_aware_zero_pad`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_aware_zero_pad
4411 [`Formatter::sign_minus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_minus
4412 [`Formatter::sign_plus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_plus
4413 [`Formatter::width`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.width
4414 [`Iterator::cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.cmp
4415 [`Iterator::eq`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.eq
4416 [`Iterator::ge`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ge
4417 [`Iterator::gt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.gt
4418 [`Iterator::le`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.le
4419 [`Iterator::lt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.lt
4420 [`Iterator::ne`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ne
4421 [`Iterator::partial_cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.partial_cmp
4422 [`Path::canonicalize`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.canonicalize
4423 [`Path::exists`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.exists
4424 [`Path::is_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_dir
4425 [`Path::is_file`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_file
4426 [`Path::metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.metadata
4427 [`Path::read_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_dir
4428 [`Path::read_link`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_link
4429 [`Path::symlink_metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.symlink_metadata
4430 [`Utf8Error::valid_up_to`]: http://doc.rust-lang.org/nightly/core/str/struct.Utf8Error.html#method.valid_up_to
4431 [`Vec::resize`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.resize
4432 [`VecDeque::as_mut_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_mut_slices
4433 [`VecDeque::as_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_slices
4434 [`VecDeque::insert`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.insert
4435 [`VecDeque::shrink_to_fit`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.shrink_to_fit
4436 [`VecDeque::swap_remove_back`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_back
4437 [`VecDeque::swap_remove_front`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_front
4438 [`slice::split_first_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first_mut
4439 [`slice::split_first`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first
4440 [`slice::split_last_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last_mut
4441 [`slice::split_last`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last
4442 [`char::from_u32_unchecked`]: http://doc.rust-lang.org/nightly/std/char/fn.from_u32_unchecked.html
4443 [`fs::canonicalize`]: http://doc.rust-lang.org/nightly/std/fs/fn.canonicalize.html
4444 [`str::MatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.MatchIndices.html
4445 [`str::RMatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.RMatchIndices.html
4446 [`str::match_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.match_indices
4447 [`str::rmatch_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatch_indices
4448 [`str::slice_mut_unchecked`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.slice_mut_unchecked
4449 [`string::ParseError`]: http://doc.rust-lang.org/nightly/std/string/enum.ParseError.html
4451 Version 1.4.0 (2015-10-29)
4452 ==========================
4454 * ~1200 changes, numerous bugfixes
4459 * Windows builds targeting the 64-bit MSVC ABI and linker (instead of
4460 GNU) are now supported and recommended for use.
4465 * [Several changes have been made to fix type soundness and improve
4466 the behavior of associated types][sound]. See [RFC 1214]. Although
4467 we have mostly introduced these changes as warnings this release, to
4468 become errors next release, there are still some scenarios that will
4469 see immediate breakage.
4470 * [The `str::lines` and `BufRead::lines` iterators treat `\r\n` as
4471 line breaks in addition to `\n`][crlf].
4472 * [Loans of `'static` lifetime extend to the end of a function][stat].
4473 * [`str::parse` no longer introduces avoidable rounding error when
4474 parsing floating point numbers. Together with earlier changes to
4475 float formatting/output, "round trips" like f.to_string().parse()
4476 now preserve the value of f exactly. Additionally, leading plus
4477 signs are now accepted][fp3].
4483 * `use` statements that import multiple items [can now rename
4484 them][i], as in `use foo::{bar as kitten, baz as puppy}`.
4485 * [Binops work correctly on fat pointers][binfat].
4486 * `pub extern crate`, which does not behave as expected, [issues a
4487 warning][pec] until a better solution is found.
4492 * [Many APIs were stabilized][stab]: `<Box<str>>::into_string`,
4493 [`Arc::downgrade`], [`Arc::get_mut`], [`Arc::make_mut`],
4494 [`Arc::try_unwrap`], [`Box::from_raw`], [`Box::into_raw`], [`CStr::to_str`],
4495 [`CStr::to_string_lossy`], [`CString::from_raw`], [`CString::into_raw`],
4496 [`IntoRawFd::into_raw_fd`], [`IntoRawFd`],
4497 `IntoRawHandle::into_raw_handle`, `IntoRawHandle`,
4498 `IntoRawSocket::into_raw_socket`, `IntoRawSocket`, [`Rc::downgrade`],
4499 [`Rc::get_mut`], [`Rc::make_mut`], [`Rc::try_unwrap`], [`Result::expect`],
4500 [`String::into_boxed_str`], [`TcpStream::read_timeout`],
4501 [`TcpStream::set_read_timeout`], [`TcpStream::set_write_timeout`],
4502 [`TcpStream::write_timeout`], [`UdpSocket::read_timeout`],
4503 [`UdpSocket::set_read_timeout`], [`UdpSocket::set_write_timeout`],
4504 [`UdpSocket::write_timeout`], `Vec::append`, `Vec::split_off`,
4505 [`VecDeque::append`], [`VecDeque::retain`], [`VecDeque::split_off`],
4506 [`rc::Weak::upgrade`], [`rc::Weak`], [`slice::Iter::as_slice`],
4507 [`slice::IterMut::into_slice`], [`str::CharIndices::as_str`],
4508 [`str::Chars::as_str`], [`str::split_at_mut`], [`str::split_at`],
4509 [`sync::Weak::upgrade`], [`sync::Weak`], [`thread::park_timeout`],
4511 * [Some APIs were deprecated][dep]: `BTreeMap::with_b`,
4512 `BTreeSet::with_b`, `Option::as_mut_slice`, `Option::as_slice`,
4513 `Result::as_mut_slice`, `Result::as_slice`, `f32::from_str_radix`,
4514 `f64::from_str_radix`.
4515 * [Reverse-searching strings is faster with the 'two-way'
4517 * [`std::io::copy` allows `?Sized` arguments][cc].
4518 * The `Windows`, `Chunks`, and `ChunksMut` iterators over slices all
4519 [override `count`, `nth` and `last` with an O(1)
4520 implementation][it].
4521 * [`Default` is implemented for arrays up to `[T; 32]`][d].
4522 * [`IntoRawFd` has been added to the Unix-specific prelude,
4523 `IntoRawSocket` and `IntoRawHandle` to the Windows-specific
4525 * [`Extend<String>` and `FromIterator<String` are both implemented for
4527 * [`IntoIterator` is implemented for references to `Option` and
4529 * [`HashMap` and `HashSet` implement `Extend<&T>` where `T:
4530 Copy`][ext] as part of [RFC 839]. This will cause type inference
4531 breakage in rare situations.
4532 * [`BinaryHeap` implements `Debug`][bh2].
4533 * [`Borrow` and `BorrowMut` are implemented for fixed-size
4535 * [`extern fn`s with the "Rust" and "C" ABIs implement common
4536 traits including `Eq`, `Ord`, `Debug`, `Hash`][fp].
4537 * [String comparison is faster][faststr].
4538 * `&mut T` where `T: std::fmt::Write` [also implements
4539 `std::fmt::Write`][mutw].
4540 * [A stable regression in `VecDeque::push_back` and other
4541 capacity-altering methods that caused panics for zero-sized types
4543 * [Function pointers implement traits for up to 12 parameters][fp2].
4548 * The compiler [no longer uses the 'morestack' feature to prevent
4549 stack overflow][mm]. Instead it uses guard pages and stack
4550 probes (though stack probes are not yet implemented on any platform
4552 * [The compiler matches traits faster when projections are involved][p].
4553 * The 'improper_ctypes' lint [no longer warns about use of `isize` and
4555 * [Cargo now displays useful information about what its doing during
4556 `cargo update`][cu].
4558 [`Arc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.downgrade
4559 [`Arc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.make_mut
4560 [`Arc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.get_mut
4561 [`Arc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.try_unwrap
4562 [`Box::from_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.from_raw
4563 [`Box::into_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.into_raw
4564 [`CStr::to_str`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_str
4565 [`CStr::to_string_lossy`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_string_lossy
4566 [`CString::from_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.from_raw
4567 [`CString::into_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_raw
4568 [`IntoRawFd::into_raw_fd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html#tymethod.into_raw_fd
4569 [`IntoRawFd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html
4570 [`Rc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.downgrade
4571 [`Rc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.get_mut
4572 [`Rc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.make_mut
4573 [`Rc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.try_unwrap
4574 [`Result::expect`]: http://doc.rust-lang.org/nightly/core/result/enum.Result.html#method.expect
4575 [`String::into_boxed_str`]: http://doc.rust-lang.org/nightly/collections/string/struct.String.html#method.into_boxed_str
4576 [`TcpStream::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
4577 [`TcpStream::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
4578 [`TcpStream::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
4579 [`TcpStream::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
4580 [`UdpSocket::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
4581 [`UdpSocket::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
4582 [`UdpSocket::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
4583 [`UdpSocket::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
4584 [`VecDeque::append`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.append
4585 [`VecDeque::retain`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.retain
4586 [`VecDeque::split_off`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.split_off
4587 [`rc::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html#method.upgrade
4588 [`rc::Weak`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html
4589 [`slice::Iter::as_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.Iter.html#method.as_slice
4590 [`slice::IterMut::into_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.IterMut.html#method.into_slice
4591 [`str::CharIndices::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.CharIndices.html#method.as_str
4592 [`str::Chars::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.Chars.html#method.as_str
4593 [`str::split_at_mut`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at_mut
4594 [`str::split_at`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at
4595 [`sync::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html#method.upgrade
4596 [`sync::Weak`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html
4597 [`thread::park_timeout`]: http://doc.rust-lang.org/nightly/std/thread/fn.park_timeout.html
4598 [`thread::sleep`]: http://doc.rust-lang.org/nightly/std/thread/fn.sleep.html
4599 [bh2]: https://github.com/rust-lang/rust/pull/28156
4600 [binfat]: https://github.com/rust-lang/rust/pull/28270
4601 [bm]: https://github.com/rust-lang/rust/pull/28197
4602 [cc]: https://github.com/rust-lang/rust/pull/27531
4603 [crlf]: https://github.com/rust-lang/rust/pull/28034
4604 [cu]: https://github.com/rust-lang/cargo/pull/1931
4605 [d]: https://github.com/rust-lang/rust/pull/27825
4606 [dep]: https://github.com/rust-lang/rust/pull/28339
4607 [es]: https://github.com/rust-lang/rust/pull/27956
4608 [ext]: https://github.com/rust-lang/rust/pull/28094
4609 [faststr]: https://github.com/rust-lang/rust/pull/28338
4610 [ffi]: https://github.com/rust-lang/rust/pull/28779
4611 [fp]: https://github.com/rust-lang/rust/pull/28268
4612 [fp2]: https://github.com/rust-lang/rust/pull/28560
4613 [fp3]: https://github.com/rust-lang/rust/pull/27307
4614 [i]: https://github.com/rust-lang/rust/pull/27451
4615 [into2]: https://github.com/rust-lang/rust/pull/28039
4616 [it]: https://github.com/rust-lang/rust/pull/27652
4617 [mm]: https://github.com/rust-lang/rust/pull/27338
4618 [mutw]: https://github.com/rust-lang/rust/pull/28368
4619 [sound]: https://github.com/rust-lang/rust/pull/27641
4620 [p]: https://github.com/rust-lang/rust/pull/27866
4621 [pec]: https://github.com/rust-lang/rust/pull/28486
4622 [pr]: https://github.com/rust-lang/rust/pull/27896
4623 [RFC 839]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
4624 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
4625 [s]: https://github.com/rust-lang/rust/pull/27474
4626 [stab]: https://github.com/rust-lang/rust/pull/28339
4627 [stat]: https://github.com/rust-lang/rust/pull/28321
4628 [vd]: https://github.com/rust-lang/rust/pull/28494
4630 Version 1.3.0 (2015-09-17)
4631 ==============================
4633 * ~900 changes, numerous bugfixes
4638 * The [new object lifetime defaults][nold] have been [turned
4639 on][nold2] after a cycle of warnings about the change. Now types
4640 like `&'a Box<Trait>` (or `&'a Rc<Trait>`, etc) will change from
4641 being interpreted as `&'a Box<Trait+'a>` to `&'a
4642 Box<Trait+'static>`.
4643 * [The Rustonomicon][nom] is a new book in the official documentation
4644 that dives into writing unsafe Rust.
4645 * The [`Duration`] API, [has been stabilized][ds]. This basic unit of
4646 timekeeping is employed by other std APIs, as well as out-of-tree
4652 * The [new object lifetime defaults][nold] have been [turned
4653 on][nold2] after a cycle of warnings about the change.
4654 * There is a known [regression][lr] in how object lifetime elision is
4655 interpreted, the proper solution for which is undetermined.
4656 * The `#[prelude_import]` attribute, an internal implementation
4657 detail, was accidentally stabilized previously. [It has been put
4658 behind the `prelude_import` feature gate][pi]. This change is
4659 believed to break no existing code.
4660 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
4661 [more sane for dynamically sized types][dst3]. Code that relied on
4662 the previous behavior is thought to be broken.
4663 * The `dropck` rules, which checks that destructors can't access
4664 destroyed values, [have been updated][dropck] to match the
4665 [RFC][dropckrfc]. This fixes some soundness holes, and as such will
4666 cause some previously-compiling code to no longer build.
4671 * The [new object lifetime defaults][nold] have been [turned
4672 on][nold2] after a cycle of warnings about the change.
4673 * Semicolons may [now follow types and paths in
4674 macros](https://github.com/rust-lang/rust/pull/27000).
4675 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
4676 [more sane for dynamically sized types][dst3]. Code that relied on
4677 the previous behavior is not known to exist, and suspected to be
4679 * `'static` variables [may now be recursive][st].
4680 * `ref` bindings choose between [`Deref`] and [`DerefMut`]
4681 implementations correctly.
4682 * The `dropck` rules, which checks that destructors can't access
4683 destroyed values, [have been updated][dropck] to match the
4689 * The [`Duration`] API, [has been stabilized][ds], as well as the
4690 `std::time` module, which presently contains only `Duration`.
4691 * `Box<str>` and `Box<[T]>` both implement `Clone`.
4692 * The owned C string, [`CString`], implements [`Borrow`] and the
4693 borrowed C string, [`CStr`], implements [`ToOwned`]. The two of
4694 these allow C strings to be borrowed and cloned in generic code.
4695 * [`CStr`] implements [`Debug`].
4696 * [`AtomicPtr`] implements [`Debug`].
4697 * [`Error`] trait objects [can be downcast to their concrete types][e]
4698 in many common configurations, using the [`is`], [`downcast`],
4699 [`downcast_ref`] and [`downcast_mut`] methods, similarly to the
4701 * Searching for substrings now [employs the two-way algorithm][search]
4702 instead of doing a naive search. This gives major speedups to a
4703 number of methods, including [`contains`][sc], [`find`][sf],
4704 [`rfind`][srf], [`split`][ss]. [`starts_with`][ssw] and
4705 [`ends_with`][sew] are also faster.
4706 * The performance of `PartialEq` for slices is [much faster][ps].
4707 * The [`Hash`] trait offers the default method, [`hash_slice`], which
4708 is overridden and optimized by the implementations for scalars.
4709 * The [`Hasher`] trait now has a number of specialized `write_*`
4710 methods for primitive types, for efficiency.
4711 * The I/O-specific error type, [`std::io::Error`][ie], gained a set of
4712 methods for accessing the 'inner error', if any: [`get_ref`][iegr],
4713 [`get_mut`][iegm], [`into_inner`][ieii]. As well, the implementation
4714 of [`std::error::Error::cause`][iec] also delegates to the inner
4716 * [`process::Child`][pc] gained the [`id`] method, which returns a
4717 `u32` representing the platform-specific process identifier.
4718 * The [`connect`] method on slices is deprecated, replaced by the new
4719 [`join`] method (note that both of these are on the *unstable*
4720 [`SliceConcatExt`] trait, but through the magic of the prelude are
4721 available to stable code anyway).
4722 * The [`Div`] operator is implemented for [`Wrapping`] types.
4723 * [`DerefMut` is implemented for `String`][dms].
4724 * Performance of SipHash (the default hasher for `HashMap`) is
4725 [better for long data][sh].
4726 * [`AtomicPtr`] implements [`Send`].
4727 * The [`read_to_end`] implementations for [`Stdin`] and [`File`]
4728 are now [specialized to use uninitialized buffers for increased
4730 * Lifetime parameters of foreign functions [are now resolved
4736 * Rust can now, with some coercion, [produce programs that run on
4737 Windows XP][xp], though XP is not considered a supported platform.
4738 * Porting Rust on Windows from the GNU toolchain to MSVC continues
4739 ([1][win1], [2][win2], [3][win3], [4][win4]). It is still not
4740 recommended for use in 1.3, though should be fully-functional
4741 in the [64-bit 1.4 beta][b14].
4742 * On Fedora-based systems installation will [properly configure the
4743 dynamic linker][fl].
4744 * The compiler gained many new extended error descriptions, which can
4745 be accessed with the `--explain` flag.
4746 * The `dropck` pass, which checks that destructors can't access
4747 destroyed values, [has been rewritten][dropck]. This fixes some
4748 soundness holes, and as such will cause some previously-compiling
4749 code to no longer build.
4750 * `rustc` now uses [LLVM to write archive files where possible][ar].
4751 Eventually this will eliminate the compiler's dependency on the ar
4753 * Rust has [preliminary support for i686 FreeBSD][fb] (it has long
4754 supported FreeBSD on x86_64).
4755 * The [`unused_mut`][lum], [`unconditional_recursion`][lur],
4756 [`improper_ctypes`][lic], and [`negate_unsigned`][lnu] lints are
4758 * If landing pads are disabled (with `-Z no-landing-pads`), [`panic!`
4759 will kill the process instead of leaking][nlp].
4761 [`Any`]: http://doc.rust-lang.org/nightly/std/any/trait.Any.html
4762 [`AtomicPtr`]: http://doc.rust-lang.org/nightly/std/sync/atomic/struct.AtomicPtr.html
4763 [`Borrow`]: http://doc.rust-lang.org/nightly/std/borrow/trait.Borrow.html
4764 [`CStr`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html
4765 [`CString`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html
4766 [`Debug`]: http://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
4767 [`DerefMut`]: http://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
4768 [`Deref`]: http://doc.rust-lang.org/nightly/std/ops/trait.Deref.html
4769 [`Div`]: http://doc.rust-lang.org/nightly/std/ops/trait.Div.html
4770 [`Duration`]: http://doc.rust-lang.org/nightly/std/time/struct.Duration.html
4771 [`Error`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html
4772 [`File`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html
4773 [`Hash`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html
4774 [`Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
4775 [`Send`]: http://doc.rust-lang.org/nightly/std/marker/trait.Send.html
4776 [`SliceConcatExt`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html
4777 [`Stdin`]: http://doc.rust-lang.org/nightly/std/io/struct.Stdin.html
4778 [`ToOwned`]: http://doc.rust-lang.org/nightly/std/borrow/trait.ToOwned.html
4779 [`Wrapping`]: http://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
4780 [`connect`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.connect
4781 [`downcast_mut`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_mut
4782 [`downcast_ref`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_ref
4783 [`downcast`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast
4784 [`hash_slice`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
4785 [`id`]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html#method.id
4786 [`is`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.is
4787 [`join`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.join
4788 [`read_to_end`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_to_end
4789 [ar]: https://github.com/rust-lang/rust/pull/26926
4790 [b14]: https://static.rust-lang.org/dist/rust-beta-x86_64-pc-windows-msvc.msi
4791 [dms]: https://github.com/rust-lang/rust/pull/26241
4792 [dropck]: https://github.com/rust-lang/rust/pull/27261
4793 [dropckrfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
4794 [ds]: https://github.com/rust-lang/rust/pull/26818
4795 [dst1]: http://doc.rust-lang.org/nightly/std/mem/fn.size_of_val.html
4796 [dst2]: http://doc.rust-lang.org/nightly/std/mem/fn.align_of_val.html
4797 [dst3]: https://github.com/rust-lang/rust/pull/27351
4798 [e]: https://github.com/rust-lang/rust/pull/24793
4799 [f]: https://github.com/rust-lang/rust/pull/26588
4800 [fb]: https://github.com/rust-lang/rust/pull/26959
4801 [fl]: https://github.com/rust-lang/rust-installer/pull/41
4802 [hs]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
4803 [ie]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html
4804 [iec]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.cause
4805 [iegm]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_mut
4806 [iegr]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_ref
4807 [ieii]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.into_inner
4808 [lic]: https://github.com/rust-lang/rust/pull/26583
4809 [lnu]: https://github.com/rust-lang/rust/pull/27026
4810 [lr]: https://github.com/rust-lang/rust/issues/27248
4811 [lum]: https://github.com/rust-lang/rust/pull/26378
4812 [lur]: https://github.com/rust-lang/rust/pull/26783
4813 [nlp]: https://github.com/rust-lang/rust/pull/27176
4814 [nold2]: https://github.com/rust-lang/rust/pull/27045
4815 [nold]: https://github.com/rust-lang/rfcs/blob/master/text/1156-adjust-default-object-bounds.md
4816 [nom]: http://doc.rust-lang.org/nightly/nomicon/
4817 [pc]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html
4818 [pi]: https://github.com/rust-lang/rust/pull/26699
4819 [ps]: https://github.com/rust-lang/rust/pull/26884
4820 [rte]: https://github.com/rust-lang/rust/pull/26950
4821 [sc]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.contains
4822 [search]: https://github.com/rust-lang/rust/pull/26327
4823 [sew]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.ends_with
4824 [sf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.find
4825 [sh]: https://github.com/rust-lang/rust/pull/27280
4826 [srf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rfind
4827 [ss]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split
4828 [ssw]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.starts_with
4829 [st]: https://github.com/rust-lang/rust/pull/26630
4830 [win1]: https://github.com/rust-lang/rust/pull/26569
4831 [win2]: https://github.com/rust-lang/rust/pull/26741
4832 [win3]: https://github.com/rust-lang/rust/pull/26741
4833 [win4]: https://github.com/rust-lang/rust/pull/27210
4834 [xp]: https://github.com/rust-lang/rust/pull/26569
4836 Version 1.2.0 (2015-08-07)
4837 ==========================
4839 * ~1200 changes, numerous bugfixes
4844 * [Dynamically-sized-type coercions][dst] allow smart pointer types
4845 like `Rc` to contain types without a fixed size, arrays and trait
4846 objects, finally enabling use of `Rc<[T]>` and completing the
4847 implementation of DST.
4848 * [Parallel codegen][parcodegen] is now working again, which can
4849 substantially speed up large builds in debug mode; It also gets
4850 another ~33% speedup when bootstrapping on a 4 core machine (using 8
4851 jobs). It's not enabled by default, but will be "in the near
4852 future". It can be activated with the `-C codegen-units=N` flag to
4854 * This is the first release with [experimental support for linking
4855 with the MSVC linker and lib C on Windows (instead of using the GNU
4856 variants via MinGW)][win]. It is yet recommended only for the most
4857 intrepid Rustaceans.
4858 * Benchmark compilations are showing a 30% improvement in
4859 bootstrapping over 1.1.
4864 * The [`to_uppercase`] and [`to_lowercase`] methods on `char` now do
4865 unicode case mapping, which is a previously-planned change in
4866 behavior and considered a bugfix.
4867 * [`mem::align_of`] now specifies [the *minimum alignment* for
4868 T][align], which is usually the alignment programs are interested
4869 in, and the same value reported by clang's
4870 `alignof`. [`mem::min_align_of`] is deprecated. This is not known to
4872 * [The `#[packed]` attribute is no longer silently accepted by the
4873 compiler][packed]. This attribute did nothing and code that
4874 mentioned it likely did not work as intended.
4875 * Associated type defaults are [now behind the
4876 `associated_type_defaults` feature gate][ad]. In 1.1 associated type
4877 defaults *did not work*, but could be mentioned syntactically. As
4878 such this breakage has minimal impact.
4883 * Patterns with `ref mut` now correctly invoke [`DerefMut`] when
4884 matching against dereferenceable values.
4889 * The [`Extend`] trait, which grows a collection from an iterator, is
4890 implemented over iterators of references, for `String`, `Vec`,
4891 `LinkedList`, `VecDeque`, `EnumSet`, `BinaryHeap`, `VecMap`,
4892 `BTreeSet` and `BTreeMap`. [RFC][extend-rfc].
4893 * The [`iter::once`] function returns an iterator that yields a single
4894 element, and [`iter::empty`] returns an iterator that yields no
4896 * The [`matches`] and [`rmatches`] methods on `str` return iterators
4897 over substring matches.
4898 * [`Cell`] and [`RefCell`] both implement `Eq`.
4899 * A number of methods for wrapping arithmetic are added to the
4900 integral types, [`wrapping_div`], [`wrapping_rem`],
4901 [`wrapping_neg`], [`wrapping_shl`], [`wrapping_shr`]. These are in
4902 addition to the existing [`wrapping_add`], [`wrapping_sub`], and
4903 [`wrapping_mul`] methods, and alternatives to the [`Wrapping`]
4904 type.. It is illegal for the default arithmetic operations in Rust
4905 to overflow; the desire to wrap must be explicit.
4906 * The `{:#?}` formatting specifier [displays the alternate,
4907 pretty-printed][debugfmt] form of the `Debug` formatter. This
4908 feature was actually introduced prior to 1.0 with little
4910 * [`fmt::Formatter`] implements [`fmt::Write`], a `fmt`-specific trait
4911 for writing data to formatted strings, similar to [`io::Write`].
4912 * [`fmt::Formatter`] adds 'debug builder' methods, [`debug_struct`],
4913 [`debug_tuple`], [`debug_list`], [`debug_set`], [`debug_map`]. These
4914 are used by code generators to emit implementations of [`Debug`].
4915 * `str` has new [`to_uppercase`][strup] and [`to_lowercase`][strlow]
4916 methods that convert case, following Unicode case mapping.
4917 * It is now easier to handle poisoned locks. The [`PoisonError`]
4918 type, returned by failing lock operations, exposes `into_inner`,
4919 `get_ref`, and `get_mut`, which all give access to the inner lock
4920 guard, and allow the poisoned lock to continue to operate. The
4921 `is_poisoned` method of [`RwLock`] and [`Mutex`] can poll for a
4922 poisoned lock without attempting to take the lock.
4923 * On Unix the [`FromRawFd`] trait is implemented for [`Stdio`], and
4924 [`AsRawFd`] for [`ChildStdin`], [`ChildStdout`], [`ChildStderr`].
4925 On Windows the `FromRawHandle` trait is implemented for `Stdio`,
4926 and `AsRawHandle` for `ChildStdin`, `ChildStdout`,
4928 * [`io::ErrorKind`] has a new variant, `InvalidData`, which indicates
4934 * `rustc` employs smarter heuristics for guessing at [typos].
4935 * `rustc` emits more efficient code for [no-op conversions between
4936 unsafe pointers][nop].
4937 * Fat pointers are now [passed in pairs of immediate arguments][fat],
4938 resulting in faster compile times and smaller code.
4940 [`Extend`]: https://doc.rust-lang.org/nightly/std/iter/trait.Extend.html
4941 [extend-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
4942 [`iter::once`]: https://doc.rust-lang.org/nightly/std/iter/fn.once.html
4943 [`iter::empty`]: https://doc.rust-lang.org/nightly/std/iter/fn.empty.html
4944 [`matches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.matches
4945 [`rmatches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatches
4946 [`Cell`]: https://doc.rust-lang.org/nightly/std/cell/struct.Cell.html
4947 [`RefCell`]: https://doc.rust-lang.org/nightly/std/cell/struct.RefCell.html
4948 [`wrapping_add`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_add
4949 [`wrapping_sub`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_sub
4950 [`wrapping_mul`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_mul
4951 [`wrapping_div`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_div
4952 [`wrapping_rem`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_rem
4953 [`wrapping_neg`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_neg
4954 [`wrapping_shl`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shl
4955 [`wrapping_shr`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shr
4956 [`Wrapping`]: https://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
4957 [`fmt::Formatter`]: https://doc.rust-lang.org/nightly/std/fmt/struct.Formatter.html
4958 [`fmt::Write`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Write.html
4959 [`io::Write`]: https://doc.rust-lang.org/nightly/std/io/trait.Write.html
4960 [`debug_struct`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_struct
4961 [`debug_tuple`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_tuple
4962 [`debug_list`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_list
4963 [`debug_set`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_set
4964 [`debug_map`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_map
4965 [`Debug`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
4966 [strup]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_uppercase
4967 [strlow]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_lowercase
4968 [`to_uppercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_uppercase
4969 [`to_lowercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_lowercase
4970 [`PoisonError`]: https://doc.rust-lang.org/nightly/std/sync/struct.PoisonError.html
4971 [`RwLock`]: https://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html
4972 [`Mutex`]: https://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html
4973 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
4974 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
4975 [`Stdio`]: https://doc.rust-lang.org/nightly/std/process/struct.Stdio.html
4976 [`ChildStdin`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdin.html
4977 [`ChildStdout`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdout.html
4978 [`ChildStderr`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStderr.html
4979 [`io::ErrorKind`]: https://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html
4980 [debugfmt]: https://www.reddit.com/r/rust/comments/3ceaui/psa_produces_prettyprinted_debug_output/
4981 [`DerefMut`]: https://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
4982 [`mem::align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.align_of.html
4983 [align]: https://github.com/rust-lang/rust/pull/25646
4984 [`mem::min_align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.min_align_of.html
4985 [typos]: https://github.com/rust-lang/rust/pull/26087
4986 [nop]: https://github.com/rust-lang/rust/pull/26336
4987 [fat]: https://github.com/rust-lang/rust/pull/26411
4988 [dst]: https://github.com/rust-lang/rfcs/blob/master/text/0982-dst-coercion.md
4989 [parcodegen]: https://github.com/rust-lang/rust/pull/26018
4990 [packed]: https://github.com/rust-lang/rust/pull/25541
4991 [ad]: https://github.com/rust-lang/rust/pull/27382
4992 [win]: https://github.com/rust-lang/rust/pull/25350
4994 Version 1.1.0 (2015-06-25)
4995 =========================
4997 * ~850 changes, numerous bugfixes
5002 * The [`std::fs` module has been expanded][fs] to expand the set of
5003 functionality exposed:
5004 * `DirEntry` now supports optimizations like `file_type` and `metadata` which
5005 don't incur a syscall on some platforms.
5006 * A `symlink_metadata` function has been added.
5007 * The `fs::Metadata` structure now lowers to its OS counterpart, providing
5008 access to all underlying information.
5009 * The compiler now contains extended explanations of many errors. When an error
5010 with an explanation occurs the compiler suggests using the `--explain` flag
5011 to read the explanation. Error explanations are also [available online][err-index].
5012 * Thanks to multiple [improvements][sk] to [type checking][pre], as
5013 well as other work, the time to bootstrap the compiler decreased by
5019 * The [`str::split_whitespace`] method splits a string on unicode
5020 whitespace boundaries.
5021 * On both Windows and Unix, new extension traits provide conversion of
5022 I/O types to and from the underlying system handles. On Unix, these
5023 traits are [`FromRawFd`] and [`AsRawFd`], on Windows `FromRawHandle`
5024 and `AsRawHandle`. These are implemented for `File`, `TcpStream`,
5025 `TcpListener`, and `UpdSocket`. Further implementations for
5026 `std::process` will be stabilized later.
5027 * On Unix, [`std::os::unix::symlink`] creates symlinks. On
5028 Windows, symlinks can be created with
5029 `std::os::windows::symlink_dir` and
5030 `std::os::windows::symlink_file`.
5031 * The `mpsc::Receiver` type can now be converted into an iterator with
5032 `into_iter` on the [`IntoIterator`] trait.
5033 * `Ipv4Addr` can be created from `u32` with the `From<u32>`
5034 implementation of the [`From`] trait.
5035 * The `Debug` implementation for `RangeFull` [creates output that is
5036 more consistent with other implementations][rf].
5037 * [`Debug` is implemented for `File`][file].
5038 * The `Default` implementation for `Arc` [no longer requires `Sync +
5040 * [The `Iterator` methods `count`, `nth`, and `last` have been
5041 overridden for slices to have O(1) performance instead of O(n)][si].
5042 * Incorrect handling of paths on Windows has been improved in both the
5043 compiler and the standard library.
5044 * [`AtomicPtr` gained a `Default` implementation][ap].
5045 * In accordance with Rust's policy on arithmetic overflow `abs` now
5046 [panics on overflow when debug assertions are enabled][abs].
5047 * The [`Cloned`] iterator, which was accidentally left unstable for
5048 1.0 [has been stabilized][c].
5049 * The [`Incoming`] iterator, which iterates over incoming TCP
5050 connections, and which was accidentally unnamable in 1.0, [is now
5051 properly exported][inc].
5052 * [`BinaryHeap`] no longer corrupts itself [when functions called by
5053 `sift_up` or `sift_down` panic][bh].
5054 * The [`split_off`] method of `LinkedList` [no longer corrupts
5055 the list in certain scenarios][ll].
5060 * Type checking performance [has improved notably][sk] with
5061 [multiple improvements][pre].
5062 * The compiler [suggests code changes][ch] for more errors.
5063 * rustc and it's build system have experimental support for [building
5064 toolchains against MUSL][m] instead of glibc on Linux.
5065 * The compiler defines the `target_env` cfg value, which is used for
5066 distinguishing toolchains that are otherwise for the same
5067 platform. Presently this is set to `gnu` for common GNU Linux
5068 targets and for MinGW targets, and `musl` for MUSL Linux targets.
5069 * The [`cargo rustc`][crc] command invokes a build with custom flags
5071 * [Android executables are always position independent][pie].
5072 * [The `drop_with_repr_extern` lint warns about mixing `repr(C)`
5075 [`str::split_whitespace`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_whitespace
5076 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
5077 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
5078 [`std::os::unix::symlink`]: https://doc.rust-lang.org/nightly/std/os/unix/fs/fn.symlink.html
5079 [`IntoIterator`]: https://doc.rust-lang.org/nightly/std/iter/trait.IntoIterator.html
5080 [`From`]: https://doc.rust-lang.org/nightly/std/convert/trait.From.html
5081 [rf]: https://github.com/rust-lang/rust/pull/24491
5082 [err-index]: https://doc.rust-lang.org/error-index.html
5083 [sk]: https://github.com/rust-lang/rust/pull/24615
5084 [pre]: https://github.com/rust-lang/rust/pull/25323
5085 [file]: https://github.com/rust-lang/rust/pull/24598
5086 [ch]: https://github.com/rust-lang/rust/pull/24683
5087 [arc]: https://github.com/rust-lang/rust/pull/24695
5088 [si]: https://github.com/rust-lang/rust/pull/24701
5089 [ap]: https://github.com/rust-lang/rust/pull/24834
5090 [m]: https://github.com/rust-lang/rust/pull/24777
5091 [fs]: https://github.com/rust-lang/rfcs/blob/master/text/1044-io-fs-2.1.md
5092 [crc]: https://github.com/rust-lang/cargo/pull/1568
5093 [pie]: https://github.com/rust-lang/rust/pull/24953
5094 [abs]: https://github.com/rust-lang/rust/pull/25441
5095 [c]: https://github.com/rust-lang/rust/pull/25496
5096 [`Cloned`]: https://doc.rust-lang.org/nightly/std/iter/struct.Cloned.html
5097 [`Incoming`]: https://doc.rust-lang.org/nightly/std/net/struct.Incoming.html
5098 [inc]: https://github.com/rust-lang/rust/pull/25522
5099 [bh]: https://github.com/rust-lang/rust/pull/25856
5100 [`BinaryHeap`]: https://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html
5101 [ll]: https://github.com/rust-lang/rust/pull/26022
5102 [`split_off`]: https://doc.rust-lang.org/nightly/collections/linked_list/struct.LinkedList.html#method.split_off
5103 [drop]: https://github.com/rust-lang/rust/pull/24935
5105 Version 1.0.0 (2015-05-15)
5106 ========================
5108 * ~1500 changes, numerous bugfixes
5113 * The vast majority of the standard library is now `#[stable]`. It is
5114 no longer possible to use unstable features with a stable build of
5116 * Many popular crates on [crates.io] now work on the stable release
5118 * Arithmetic on basic integer types now [checks for overflow in debug
5124 * Several [restrictions have been added to trait coherence][coh] in
5125 order to make it easier for upstream authors to change traits
5126 without breaking downstream code.
5127 * Digits of binary and octal literals are [lexed more eagerly][lex] to
5128 improve error messages and macro behavior. For example, `0b1234` is
5129 now lexed as `0b1234` instead of two tokens, `0b1` and `234`.
5130 * Trait bounds [are always invariant][inv], eliminating the need for
5131 the `PhantomFn` and `MarkerTrait` lang items, which have been
5133 * ["-" is no longer a valid character in crate names][cr], the `extern crate
5134 "foo" as bar` syntax has been replaced with `extern crate foo as
5135 bar`, and Cargo now automatically translates "-" in *package* names
5136 to underscore for the crate name.
5137 * [Lifetime shadowing is an error][lt].
5138 * [`Send` no longer implies `'static`][send-rfc].
5139 * [UFCS now supports trait-less associated paths][moar-ufcs] like
5140 `MyType::default()`.
5141 * Primitive types [now have inherent methods][prim-inherent],
5142 obviating the need for extension traits like `SliceExt`.
5143 * Methods with `Self: Sized` in their `where` clause are [considered
5144 object-safe][self-sized], allowing many extension traits like
5145 `IteratorExt` to be merged into the traits they extended.
5146 * You can now [refer to associated types][assoc-where] whose
5147 corresponding trait bounds appear only in a `where` clause.
5148 * The final bits of [OIBIT landed][oibit-final], meaning that traits
5149 like `Send` and `Sync` are now library-defined.
5150 * A [Reflect trait][reflect] was introduced, which means that
5151 downcasting via the `Any` trait is effectively limited to concrete
5152 types. This helps retain the potentially-important "parametricity"
5153 property: generic code cannot behave differently for different type
5154 arguments except in minor ways.
5155 * The `unsafe_destructor` feature is now deprecated in favor of the
5156 [new `dropck`][dropck]. This change is a major reduction in unsafe
5162 * The `thread_local` module [has been renamed to `std::thread`][th].
5163 * The methods of `IteratorExt` [have been moved to the `Iterator`
5165 * Several traits that implement Rust's conventions for type
5166 conversions, `AsMut`, `AsRef`, `From`, and `Into` have been
5167 [centralized in the `std::convert` module][con].
5168 * The `FromError` trait [was removed in favor of `From`][fe].
5169 * The basic sleep function [has moved to
5170 `std::thread::sleep_ms`][slp].
5171 * The `splitn` function now takes an `n` parameter that represents the
5172 number of items yielded by the returned iterator [instead of the
5173 number of 'splits'][spl].
5174 * [On Unix, all file descriptors are `CLOEXEC` by default][clo].
5175 * [Derived implementations of `PartialOrd` now order enums according
5176 to their explicitly-assigned discriminants][po].
5177 * [Methods for searching strings are generic over `Pattern`s][pat],
5178 implemented presently by `&char`, `&str`, `FnMut(char) -> bool` and
5180 * [In method resolution, object methods are resolved before inherent
5182 * [`String::from_str` has been deprecated in favor of the `From` impl,
5183 `String::from`][sf].
5184 * [`io::Error` implements `Sync`][ios].
5185 * [The `words` method on `&str` has been replaced with
5186 `split_whitespace`][sw], to avoid answering the tricky question, 'what is
5188 * The new path and IO modules are complete and `#[stable]`. This
5189 was the major library focus for this cycle.
5190 * The path API was [revised][path-normalize] to normalize `.`,
5191 adjusting the tradeoffs in favor of the most common usage.
5192 * A large number of remaining APIs in `std` were also stabilized
5193 during this cycle; about 75% of the non-deprecated API surface
5195 * The new [string pattern API][string-pattern] landed, which makes
5196 the string slice API much more internally consistent and flexible.
5197 * A new set of [generic conversion traits][conversion] replaced
5198 many existing ad hoc traits.
5199 * Generic numeric traits were [completely removed][num-traits]. This
5200 was made possible thanks to inherent methods for primitive types,
5201 and the removal gives maximal flexibility for designing a numeric
5202 hierarchy in the future.
5203 * The `Fn` traits are now related via [inheritance][fn-inherit]
5204 and provide ergonomic [blanket implementations][fn-blanket].
5205 * The `Index` and `IndexMut` traits were changed to
5206 [take the index by value][index-value], enabling code like
5207 `hash_map["string"]` to work.
5208 * `Copy` now [inherits][copy-clone] from `Clone`, meaning that all
5209 `Copy` data is known to be `Clone` as well.
5214 * Many errors now have extended explanations that can be accessed with
5215 the `--explain` flag to `rustc`.
5216 * Many new examples have been added to the standard library
5218 * rustdoc has received a number of improvements focused on completion
5220 * Metadata was tuned, shrinking binaries [by 27%][metadata-shrink].
5221 * Much headway was made on ecosystem-wide CI, making it possible
5222 to [compare builds for breakage][ci-compare].
5225 [crates.io]: http://crates.io
5226 [clo]: https://github.com/rust-lang/rust/pull/24034
5227 [coh]: https://github.com/rust-lang/rfcs/blob/master/text/1023-rebalancing-coherence.md
5228 [con]: https://github.com/rust-lang/rust/pull/23875
5229 [cr]: https://github.com/rust-lang/rust/pull/23419
5230 [fe]: https://github.com/rust-lang/rust/pull/23879
5231 [ie]: https://github.com/rust-lang/rust/pull/23300
5232 [inv]: https://github.com/rust-lang/rust/pull/23938
5233 [ios]: https://github.com/rust-lang/rust/pull/24133
5234 [lex]: https://github.com/rust-lang/rfcs/blob/master/text/0879-small-base-lexing.md
5235 [lt]: https://github.com/rust-lang/rust/pull/24057
5236 [meth]: https://github.com/rust-lang/rust/pull/24056
5237 [pat]: https://github.com/rust-lang/rfcs/blob/master/text/0528-string-patterns.md
5238 [po]: https://github.com/rust-lang/rust/pull/24270
5239 [sf]: https://github.com/rust-lang/rust/pull/24517
5240 [slp]: https://github.com/rust-lang/rust/pull/23949
5241 [spl]: https://github.com/rust-lang/rfcs/blob/master/text/0979-align-splitn-with-other-languages.md
5242 [sw]: https://github.com/rust-lang/rfcs/blob/master/text/1054-str-words.md
5243 [th]: https://github.com/rust-lang/rfcs/blob/master/text/0909-move-thread-local-to-std-thread.md
5244 [send-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0458-send-improvements.md
5245 [moar-ufcs]: https://github.com/rust-lang/rust/pull/22172
5246 [prim-inherent]: https://github.com/rust-lang/rust/pull/23104
5247 [overflow]: https://github.com/rust-lang/rfcs/blob/master/text/0560-integer-overflow.md
5248 [metadata-shrink]: https://github.com/rust-lang/rust/pull/22971
5249 [self-sized]: https://github.com/rust-lang/rust/pull/22301
5250 [assoc-where]: https://github.com/rust-lang/rust/pull/22512
5251 [string-pattern]: https://github.com/rust-lang/rust/pull/22466
5252 [oibit-final]: https://github.com/rust-lang/rust/pull/21689
5253 [reflect]: https://github.com/rust-lang/rust/pull/23712
5254 [conversion]: https://github.com/rust-lang/rfcs/pull/529
5255 [num-traits]: https://github.com/rust-lang/rust/pull/23549
5256 [index-value]: https://github.com/rust-lang/rust/pull/23601
5257 [dropck]: https://github.com/rust-lang/rfcs/pull/769
5258 [ci-compare]: https://gist.github.com/brson/a30a77836fbec057cbee
5259 [fn-inherit]: https://github.com/rust-lang/rust/pull/23282
5260 [fn-blanket]: https://github.com/rust-lang/rust/pull/23895
5261 [copy-clone]: https://github.com/rust-lang/rust/pull/23860
5262 [path-normalize]: https://github.com/rust-lang/rust/pull/23229
5265 Version 1.0.0-alpha.2 (2015-02-20)
5266 =====================================
5268 * ~1300 changes, numerous bugfixes
5272 * The various I/O modules were [overhauled][io-rfc] to reduce
5273 unnecessary abstractions and provide better interoperation with
5274 the underlying platform. The old `io` module remains temporarily
5276 * The standard library now [participates in feature gating][feat],
5277 so use of unstable libraries now requires a `#![feature(...)]`
5278 attribute. The impact of this change is [described on the
5279 forum][feat-forum]. [RFC][feat-rfc].
5283 * `for` loops [now operate on the `IntoIterator` trait][into],
5284 which eliminates the need to call `.iter()`, etc. to iterate
5285 over collections. There are some new subtleties to remember
5286 though regarding what sort of iterators various types yield, in
5287 particular that `for foo in bar { }` yields values from a move
5288 iterator, destroying the original collection. [RFC][into-rfc].
5289 * Objects now have [default lifetime bounds][obj], so you don't
5290 have to write `Box<Trait+'static>` when you don't care about
5291 storing references. [RFC][obj-rfc].
5292 * In types that implement `Drop`, [lifetimes must outlive the
5293 value][drop]. This will soon make it possible to safely
5294 implement `Drop` for types where `#[unsafe_destructor]` is now
5295 required. Read the [gorgeous RFC][drop-rfc] for details.
5296 * The fully qualified <T as Trait>::X syntax lets you set the Self
5297 type for a trait method or associated type. [RFC][ufcs-rfc].
5298 * References to types that implement `Deref<U>` now [automatically
5299 coerce to references][deref] to the dereferenced type `U`,
5300 e.g. `&T where T: Deref<U>` automatically coerces to `&U`. This
5301 should eliminate many unsightly uses of `&*`, as when converting
5302 from references to vectors into references to
5303 slices. [RFC][deref-rfc].
5304 * The explicit [closure kind syntax][close] (`|&:|`, `|&mut:|`,
5305 `|:|`) is obsolete and closure kind is inferred from context.
5306 * [`Self` is a keyword][Self].
5310 * The `Show` and `String` formatting traits [have been
5311 renamed][fmt] to `Debug` and `Display` to more clearly reflect
5312 their related purposes. Automatically getting a string
5313 conversion to use with `format!("{:?}", something_to_debug)` is
5314 now written `#[derive(Debug)]`.
5315 * Abstract [OS-specific string types][osstr], `std::ff::{OsString,
5316 OsStr}`, provide strings in platform-specific encodings for easier
5317 interop with system APIs. [RFC][osstr-rfc].
5318 * The `boxed::into_raw` and `Box::from_raw` functions [convert
5319 between `Box<T>` and `*mut T`][boxraw], a common pattern for
5320 creating raw pointers.
5324 * Certain long error messages of the form 'expected foo found bar'
5325 are now [split neatly across multiple
5326 lines][multiline]. Examples in the PR.
5327 * On Unix Rust can be [uninstalled][un] by running
5328 `/usr/local/lib/rustlib/uninstall.sh`.
5329 * The `#[rustc_on_unimplemented]` attribute, requiring the
5330 'on_unimplemented' feature, lets rustc [display custom error
5331 messages when a trait is expected to be implemented for a type
5336 * Rust is tested against a [LALR grammar][lalr], which parses
5337 almost all the Rust files that rustc does.
5339 [boxraw]: https://github.com/rust-lang/rust/pull/21318
5340 [close]: https://github.com/rust-lang/rust/pull/21843
5341 [deref]: https://github.com/rust-lang/rust/pull/21351
5342 [deref-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0241-deref-conversions.md
5343 [drop]: https://github.com/rust-lang/rust/pull/21972
5344 [drop-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
5345 [feat]: https://github.com/rust-lang/rust/pull/21248
5346 [feat-forum]: https://users.rust-lang.org/t/psa-important-info-about-rustcs-new-feature-staging/82/5
5347 [feat-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0507-release-channels.md
5348 [fmt]: https://github.com/rust-lang/rust/pull/21457
5349 [into]: https://github.com/rust-lang/rust/pull/20790
5350 [into-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md#intoiterator-and-iterable
5351 [io-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
5352 [lalr]: https://github.com/rust-lang/rust/pull/21452
5353 [multiline]: https://github.com/rust-lang/rust/pull/19870
5354 [obj]: https://github.com/rust-lang/rust/pull/22230
5355 [obj-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0599-default-object-bound.md
5356 [onun]: https://github.com/rust-lang/rust/pull/20889
5357 [osstr]: https://github.com/rust-lang/rust/pull/21488
5358 [osstr-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
5359 [Self]: https://github.com/rust-lang/rust/pull/22158
5360 [ufcs-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0132-ufcs.md
5361 [un]: https://github.com/rust-lang/rust/pull/22256
5364 Version 1.0.0-alpha (2015-01-09)
5365 ==================================
5367 * ~2400 changes, numerous bugfixes
5371 * The language itself is considered feature complete for 1.0,
5372 though there will be many usability improvements and bugfixes
5373 before the final release.
5374 * Nearly 50% of the public API surface of the standard library has
5375 been declared 'stable'. Those interfaces are unlikely to change
5377 * The long-running debate over integer types has been
5378 [settled][ints]: Rust will ship with types named `isize` and
5379 `usize`, rather than `int` and `uint`, for pointer-sized
5380 integers. Guidelines will be rolled out during the alpha cycle.
5381 * Most crates that are not `std` have been moved out of the Rust
5382 distribution into the Cargo ecosystem so they can evolve
5383 separately and don't need to be stabilized as quickly, including
5384 'time', 'getopts', 'num', 'regex', and 'term'.
5385 * Documentation continues to be expanded with more API coverage, more
5386 examples, and more in-depth explanations. The guides have been
5387 consolidated into [The Rust Programming Language][trpl].
5388 * "[Rust By Example][rbe]" is now maintained by the Rust team.
5389 * All official Rust binary installers now come with [Cargo], the
5390 Rust package manager.
5394 * Closures have been [completely redesigned][unboxed] to be
5395 implemented in terms of traits, can now be used as generic type
5396 bounds and thus monomorphized and inlined, or via an opaque
5397 pointer (boxed) as in the old system. The new system is often
5398 referred to as 'unboxed' closures.
5399 * Traits now support [associated types][assoc], allowing families
5400 of related types to be defined together and used generically in
5402 * Enum variants are [namespaced by their type names][enum].
5403 * [`where` clauses][where] provide a more versatile and attractive
5404 syntax for specifying generic bounds, though the previous syntax
5406 * Rust again picks a [fallback][fb] (either i32 or f64) for uninferred
5408 * Rust [no longer has a runtime][rt] of any description, and only
5409 supports OS threads, not green threads.
5410 * At long last, Rust has been overhauled for 'dynamically-sized
5411 types' ([DST]), which integrates 'fat pointers' (object types,
5412 arrays, and `str`) more deeply into the type system, making it
5414 * Rust now has a general [range syntax][range], `i..j`, `i..`, and
5415 `..j` that produce range types and which, when combined with the
5416 `Index` operator and multidispatch, leads to a convenient slice
5418 * The new range syntax revealed an ambiguity in the fixed-length
5419 array syntax, so now fixed length arrays [are written `[T;
5421 * The `Copy` trait is no longer implemented automatically. Unsafe
5422 pointers no longer implement `Sync` and `Send` so types
5423 containing them don't automatically either. `Sync` and `Send`
5424 are now 'unsafe traits' so one can "forcibly" implement them via
5425 `unsafe impl` if a type confirms to the requirements for them
5426 even though the internals do not (e.g. structs containing unsafe
5427 pointers like `Arc`). These changes are intended to prevent some
5428 footguns and are collectively known as [opt-in built-in
5429 traits][oibit] (though `Sync` and `Send` will soon become pure
5430 library types unknown to the compiler).
5431 * Operator traits now take their operands [by value][ops], and
5432 comparison traits can use multidispatch to compare one type
5433 against multiple other types, allowing e.g. `String` to be
5434 compared with `&str`.
5435 * `if let` and `while let` are no longer feature-gated.
5436 * Rust has adopted a more [uniform syntax for escaping unicode
5437 characters][unicode].
5438 * `macro_rules!` [has been declared stable][mac]. Though it is a
5439 flawed system it is sufficiently popular that it must be usable
5440 for 1.0. Effort has gone into [future-proofing][mac-future] it
5441 in ways that will allow other macro systems to be developed in
5442 parallel, and won't otherwise impact the evolution of the
5444 * The prelude has been [pared back significantly][prelude] such
5445 that it is the minimum necessary to support the most pervasive
5446 code patterns, and through [generalized where clauses][where]
5447 many of the prelude extension traits have been consolidated.
5448 * Rust's rudimentary reflection [has been removed][refl], as it
5449 incurred too much code generation for little benefit.
5450 * [Struct variants][structvars] are no longer feature-gated.
5451 * Trait bounds can be [polymorphic over lifetimes][hrtb]. Also
5452 known as 'higher-ranked trait bounds', this crucially allows
5453 unboxed closures to work.
5454 * Macros invocations surrounded by parens or square brackets and
5455 not terminated by a semicolon are [parsed as
5456 expressions][macros], which makes expressions like `vec![1i32,
5457 2, 3].len()` work as expected.
5458 * Trait objects now implement their traits automatically, and
5459 traits that can be coerced to objects now must be [object
5461 * Automatically deriving traits is now done with `#[derive(...)]`
5462 not `#[deriving(...)]` for [consistency with other naming
5463 conventions][derive].
5464 * Importing the containing module or enum at the same time as
5465 items or variants they contain is [now done with `self` instead
5466 of `mod`][self], as in use `foo::{self, bar}`
5467 * Glob imports are no longer feature-gated.
5468 * The `box` operator and `box` patterns have been feature-gated
5469 pending a redesign. For now unique boxes should be allocated
5470 like other containers, with `Box::new`.
5474 * A [series][coll1] of [efforts][coll2] to establish
5475 [conventions][coll3] for collections types has resulted in API
5476 improvements throughout the standard library.
5477 * New [APIs for error handling][err] provide ergonomic interop
5478 between error types, and [new conventions][err-conv] describe
5479 more clearly the recommended error handling strategies in Rust.
5480 * The `fail!` macro has been renamed to [`panic!`][panic] so that
5481 it is easier to discuss failure in the context of error handling
5482 without making clarifications as to whether you are referring to
5483 the 'fail' macro or failure more generally.
5484 * On Linux, `OsRng` prefers the new, more reliable `getrandom`
5485 syscall when available.
5486 * The 'serialize' crate has been renamed 'rustc-serialize' and
5487 moved out of the distribution to Cargo. Although it is widely
5488 used now, it is expected to be superseded in the near future.
5489 * The `Show` formatter, typically implemented with
5490 `#[derive(Show)]` is [now requested with the `{:?}`
5491 specifier][show] and is intended for use by all types, for uses
5492 such as `println!` debugging. The new `String` formatter must be
5493 implemented by hand, uses the `{}` specifier, and is intended
5494 for full-fidelity conversions of things that can logically be
5495 represented as strings.
5499 * [Flexible target specification][flex] allows rustc's code
5500 generation to be configured to support otherwise-unsupported
5502 * Rust comes with rust-gdb and rust-lldb scripts that launch their
5503 respective debuggers with Rust-appropriate pretty-printing.
5504 * The Windows installation of Rust is distributed with the
5505 MinGW components currently required to link binaries on that
5510 * Nullable enum optimizations have been extended to more types so
5511 that e.g. `Option<Vec<T>>` and `Option<String>` take up no more
5512 space than the inner types themselves.
5513 * Work has begun on supporting AArch64.
5515 [Cargo]: https://crates.io
5516 [unboxed]: http://smallcultfollowing.com/babysteps/blog/2014/11/26/purging-proc/
5517 [enum]: https://github.com/rust-lang/rfcs/blob/master/text/0390-enum-namespacing.md
5518 [flex]: https://github.com/rust-lang/rfcs/blob/master/text/0131-target-specification.md
5519 [err]: https://github.com/rust-lang/rfcs/blob/master/text/0201-error-chaining.md
5520 [err-conv]: https://github.com/rust-lang/rfcs/blob/master/text/0236-error-conventions.md
5521 [rt]: https://github.com/rust-lang/rfcs/blob/master/text/0230-remove-runtime.md
5522 [mac]: https://github.com/rust-lang/rfcs/blob/master/text/0453-macro-reform.md
5523 [mac-future]: https://github.com/rust-lang/rfcs/pull/550
5524 [DST]: http://smallcultfollowing.com/babysteps/blog/2014/01/05/dst-take-5/
5525 [coll1]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md
5526 [coll2]: https://github.com/rust-lang/rfcs/blob/master/text/0509-collections-reform-part-2.md
5527 [coll3]: https://github.com/rust-lang/rfcs/blob/master/text/0216-collection-views.md
5528 [ops]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md
5529 [prelude]: https://github.com/rust-lang/rfcs/blob/master/text/0503-prelude-stabilization.md
5530 [where]: https://github.com/rust-lang/rfcs/blob/master/text/0135-where.md
5531 [refl]: https://github.com/rust-lang/rfcs/blob/master/text/0379-remove-reflection.md
5532 [panic]: https://github.com/rust-lang/rfcs/blob/master/text/0221-panic.md
5533 [structvars]: https://github.com/rust-lang/rfcs/blob/master/text/0418-struct-variants.md
5534 [hrtb]: https://github.com/rust-lang/rfcs/blob/master/text/0387-higher-ranked-trait-bounds.md
5535 [unicode]: https://github.com/rust-lang/rfcs/blob/master/text/0446-es6-unicode-escapes.md
5536 [oibit]: https://github.com/rust-lang/rfcs/blob/master/text/0019-opt-in-builtin-traits.md
5537 [macros]: https://github.com/rust-lang/rfcs/blob/master/text/0378-expr-macros.md
5538 [range]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md#indexing-and-slicing
5539 [arrays]: https://github.com/rust-lang/rfcs/blob/master/text/0520-new-array-repeat-syntax.md
5540 [show]: https://github.com/rust-lang/rfcs/blob/master/text/0504-show-stabilization.md
5541 [derive]: https://github.com/rust-lang/rfcs/blob/master/text/0534-deriving2derive.md
5542 [self]: https://github.com/rust-lang/rfcs/blob/master/text/0532-self-in-use.md
5543 [fb]: https://github.com/rust-lang/rfcs/blob/master/text/0212-restore-int-fallback.md
5544 [objsafe]: https://github.com/rust-lang/rfcs/blob/master/text/0255-object-safety.md
5545 [assoc]: https://github.com/rust-lang/rfcs/blob/master/text/0195-associated-items.md
5546 [ints]: https://github.com/rust-lang/rfcs/pull/544#issuecomment-68760871
5547 [trpl]: https://doc.rust-lang.org/book/index.html
5548 [rbe]: http://rustbyexample.com/
5551 Version 0.12.0 (2014-10-09)
5552 =============================
5554 * ~1900 changes, numerous bugfixes
5558 * The introductory documentation (now called The Rust Guide) has
5559 been completely rewritten, as have a number of supplementary
5561 * Rust's package manager, Cargo, continues to improve and is
5562 sometimes considered to be quite awesome.
5563 * Many API's in `std` have been reviewed and updated for
5564 consistency with the in-development Rust coding
5565 guidelines. The standard library documentation tracks
5566 stabilization progress.
5567 * Minor libraries have been moved out-of-tree to the rust-lang org
5568 on GitHub: uuid, semver, glob, num, hexfloat, fourcc. They can
5569 be installed with Cargo.
5570 * Lifetime elision allows lifetime annotations to be left off of
5571 function declarations in many common scenarios.
5572 * Rust now works on 64-bit Windows.
5575 * Indexing can be overloaded with the `Index` and `IndexMut`
5577 * The `if let` construct takes a branch only if the `let` pattern
5578 matches, currently behind the 'if_let' feature gate.
5579 * 'where clauses', a more flexible syntax for specifying trait
5580 bounds that is more aesthetic, have been added for traits and
5581 free functions. Where clauses will in the future make it
5582 possible to constrain associated types, which would be
5583 impossible with the existing syntax.
5584 * A new slicing syntax (e.g. `[0..4]`) has been introduced behind
5585 the 'slicing_syntax' feature gate, and can be overloaded with
5586 the `Slice` or `SliceMut` traits.
5587 * The syntax for matching of sub-slices has been changed to use a
5588 postfix `..` instead of prefix (.e.g. `[a, b, c..]`), for
5589 consistency with other uses of `..` and to future-proof
5590 potential additional uses of the syntax.
5591 * The syntax for matching inclusive ranges in patterns has changed
5592 from `0..3` to `0...4` to be consistent with the exclusive range
5594 * Matching of sub-slices in non-tail positions (e.g. `[a.., b,
5595 c]`) has been put behind the 'advanced_slice_patterns' feature
5596 gate and may be removed in the future.
5597 * Components of tuples and tuple structs can be extracted using
5598 the `value.0` syntax, currently behind the `tuple_indexing`
5600 * The `#[crate_id]` attribute is no longer supported; versioning
5601 is handled by the package manager.
5602 * Renaming crate imports are now written `extern crate foo as bar`
5603 instead of `extern crate bar = foo`.
5604 * Renaming use statements are now written `use foo as bar` instead
5606 * `let` and `match` bindings and argument names in macros are now
5608 * The new, more efficient, closure types ('unboxed closures') have
5609 been added under a feature gate, 'unboxed_closures'. These will
5610 soon replace the existing closure types, once higher-ranked
5611 trait lifetimes are added to the language.
5612 * `move` has been added as a keyword, for indicating closures
5613 that capture by value.
5614 * Mutation and assignment is no longer allowed in pattern guards.
5615 * Generic structs and enums can now have trait bounds.
5616 * The `Share` trait is now called `Sync` to free up the term
5617 'shared' to refer to 'shared reference' (the default reference
5619 * Dynamically-sized types have been mostly implemented,
5620 unifying the behavior of fat-pointer types with the rest of the
5622 * As part of dynamically-sized types, the `Sized` trait has been
5623 introduced, which qualifying types implement by default, and
5624 which type parameters expect by default. To specify that a type
5625 parameter does not need to be sized, write `<Sized? T>`. Most
5626 types are `Sized`, notable exceptions being unsized arrays
5627 (`[T]`) and trait types.
5628 * Closures can return `!`, as in `|| -> !` or `proc() -> !`.
5629 * Lifetime bounds can now be applied to type parameters and object
5631 * The old, reference counted GC type, `Gc<T>` which was once
5632 denoted by the `@` sigil, has finally been removed. GC will be
5633 revisited in the future.
5636 * Library documentation has been improved for a number of modules.
5637 * Bit-vectors, collections::bitv has been modernized.
5638 * The url crate is deprecated in favor of
5639 http://github.com/servo/rust-url, which can be installed with
5641 * Most I/O stream types can be cloned and subsequently closed from
5643 * A `std::time::Duration` type has been added for use in I/O
5644 methods that rely on timers, as well as in the 'time' crate's
5645 `Timespec` arithmetic.
5646 * The runtime I/O abstraction layer that enabled the green thread
5647 scheduler to do non-thread-blocking I/O has been removed, along
5648 with the libuv-based implementation employed by the green thread
5649 scheduler. This will greatly simplify the future I/O work.
5650 * `collections::btree` has been rewritten to have a more
5651 idiomatic and efficient design.
5654 * rustdoc output now indicates the stability levels of API's.
5655 * The `--crate-name` flag can specify the name of the crate
5656 being compiled, like `#[crate_name]`.
5657 * The `-C metadata` specifies additional metadata to hash into
5658 symbol names, and `-C extra-filename` specifies additional
5659 information to put into the output filename, for use by the
5660 package manager for versioning.
5661 * debug info generation has continued to improve and should be
5662 more reliable under both gdb and lldb.
5663 * rustc has experimental support for compiling in parallel
5664 using the `-C codegen-units` flag.
5665 * rustc no longer encodes rpath information into binaries by
5669 * Stack usage has been optimized with LLVM lifetime annotations.
5670 * Official Rust binaries on Linux are more compatible with older
5671 kernels and distributions, built on CentOS 5.10.
5674 Version 0.11.0 (2014-07-02)
5675 ==========================
5677 * ~1700 changes, numerous bugfixes
5680 * ~[T] has been removed from the language. This type is superseded by
5682 * ~str has been removed from the language. This type is superseded by
5684 * ~T has been removed from the language. This type is superseded by the
5686 * @T has been removed from the language. This type is superseded by the
5687 standard library's std::gc::Gc<T> type.
5688 * Struct fields are now all private by default.
5689 * Vector indices and shift amounts are both required to be a `uint`
5690 instead of any integral type.
5691 * Byte character, byte string, and raw byte string literals are now all
5692 supported by prefixing the normal literal with a `b`.
5693 * Multiple ABIs are no longer allowed in an ABI string
5694 * The syntax for lifetimes on closures/procedures has been tweaked
5695 slightly: `<'a>|A, B|: 'b + K -> T`
5696 * Floating point modulus has been removed from the language; however it
5697 is still provided by a library implementation.
5698 * Private enum variants are now disallowed.
5699 * The `priv` keyword has been removed from the language.
5700 * A closure can no longer be invoked through a &-pointer.
5701 * The `use foo, bar, baz;` syntax has been removed from the language.
5702 * The transmute intrinsic no longer works on type parameters.
5703 * Statics now allow blocks/items in their definition.
5704 * Trait bounds are separated from objects with + instead of : now.
5705 * Objects can no longer be read while they are mutably borrowed.
5706 * The address of a static is now marked as insignificant unless the
5707 #[inline(never)] attribute is placed it.
5708 * The #[unsafe_destructor] attribute is now behind a feature gate.
5709 * Struct literals are no longer allowed in ambiguous positions such as
5710 if, while, match, and for..in.
5711 * Declaration of lang items and intrinsics are now feature-gated by
5713 * Integral literals no longer default to `int`, and floating point
5714 literals no longer default to `f64`. Literals must be suffixed with an
5715 appropriate type if inference cannot determine the type of the
5717 * The Box<T> type is no longer implicitly borrowed to &mut T.
5718 * Procedures are now required to not capture borrowed references.
5721 * The standard library is now a "facade" over a number of underlying
5722 libraries. This means that development on the standard library should
5723 be speedier due to smaller crates, as well as a clearer line between
5725 * A new library, libcore, lives under the standard library's facade
5726 which is Rust's "0-assumption" library, suitable for embedded and
5727 kernel development for example.
5728 * A regex crate has been added to the standard distribution. This crate
5729 includes statically compiled regular expressions.
5730 * The unwrap/unwrap_err methods on Result require a Show bound for
5731 better error messages.
5732 * The return types of the std::comm primitives have been centralized
5733 around the Result type.
5734 * A number of I/O primitives have gained the ability to time out their
5736 * A number of I/O primitives have gained the ability to close their
5737 reading/writing halves to cancel pending operations.
5738 * Reverse iterator methods have been removed in favor of `rev()` on
5739 their forward-iteration counterparts.
5740 * A bitflags! macro has been added to enable easy interop with C and
5741 management of bit flags.
5742 * A debug_assert! macro is now provided which is disabled when
5743 `--cfg ndebug` is passed to the compiler.
5744 * A graphviz crate has been added for creating .dot files.
5745 * The std::cast module has been migrated into std::mem.
5746 * The std::local_data api has been migrated from freestanding functions
5747 to being based on methods.
5748 * The Pod trait has been renamed to Copy.
5749 * jemalloc has been added as the default allocator for types.
5750 * The API for allocating memory has been changed to use proper alignment
5751 and sized deallocation
5752 * Connecting a TcpStream or binding a TcpListener is now based on a
5753 string address and a u16 port. This allows connecting to a hostname as
5755 * The Reader trait now contains a core method, read_at_least(), which
5756 correctly handles many repeated 0-length reads.
5757 * The process-spawning API is now centered around a builder-style
5759 * The :? printing qualifier has been moved from the standard library to
5760 an external libdebug crate.
5761 * Eq/Ord have been renamed to PartialEq/PartialOrd. TotalEq/TotalOrd
5762 have been renamed to Eq/Ord.
5763 * The select/plural methods have been removed from format!. The escapes
5764 for { and } have also changed from \{ and \} to {{ and }},
5766 * The TaskBuilder API has been re-worked to be a true builder, and
5767 extension traits for spawning native/green tasks have been added.
5770 * All breaking changes to the language or libraries now have their
5771 commit message annotated with `[breaking-change]` to allow for easy
5772 discovery of breaking changes.
5773 * The compiler will now try to suggest how to annotate lifetimes if a
5774 lifetime-related error occurs.
5775 * Debug info continues to be improved greatly with general bug fixes and
5776 better support for situations like link time optimization (LTO).
5777 * Usage of syntax extensions when cross-compiling has been fixed.
5778 * Functionality equivalent to GCC & Clang's -ffunction-sections,
5779 -fdata-sections and --gc-sections has been enabled by default
5780 * The compiler is now stricter about where it will load module files
5781 from when a module is declared via `mod foo;`.
5782 * The #[phase(syntax)] attribute has been renamed to #[phase(plugin)].
5783 Syntax extensions are now discovered via a "plugin registrar" type
5784 which will be extended in the future to other various plugins.
5785 * Lints have been restructured to allow for dynamically loadable lints.
5786 * A number of rustdoc improvements:
5787 * The HTML output has been visually redesigned.
5788 * Markdown is now powered by hoedown instead of sundown.
5789 * Searching heuristics have been greatly improved.
5790 * The search index has been reduced in size by a great amount.
5791 * Cross-crate documentation via `pub use` has been greatly improved.
5792 * Primitive types are now hyperlinked and documented.
5793 * Documentation has been moved from static.rust-lang.org/doc to
5795 * A new sandbox, play.rust-lang.org, is available for running and
5796 sharing rust code examples on-line.
5797 * Unused attributes are now more robustly warned about.
5798 * The dead_code lint now warns about unused struct fields.
5799 * Cross-compiling to iOS is now supported.
5800 * Cross-compiling to mipsel is now supported.
5801 * Stability attributes are now inherited by default and no longer apply
5802 to intra-crate usage, only inter-crate usage.
5803 * Error message related to non-exhaustive match expressions have been
5807 Version 0.10 (2014-04-03)
5808 =========================
5810 * ~1500 changes, numerous bugfixes
5813 * A new RFC process is now in place for modifying the language.
5814 * Patterns with `@`-pointers have been removed from the language.
5815 * Patterns with unique vectors (`~[T]`) have been removed from the
5817 * Patterns with unique strings (`~str`) have been removed from the
5819 * `@str` has been removed from the language.
5820 * `@[T]` has been removed from the language.
5821 * `@self` has been removed from the language.
5822 * `@Trait` has been removed from the language.
5823 * Headers on `~` allocations which contain `@` boxes inside the type for
5824 reference counting have been removed.
5825 * The semantics around the lifetimes of temporary expressions have changed,
5826 see #3511 and #11585 for more information.
5827 * Cross-crate syntax extensions are now possible, but feature gated. See
5828 #11151 for more information. This includes both `macro_rules!` macros as
5829 well as syntax extensions such as `format!`.
5830 * New lint modes have been added, and older ones have been turned on to be
5832 * Unnecessary parentheses
5835 * Uppercase variables
5836 * Publicly visible private types
5837 * `#[deriving]` with raw pointers
5838 * Unsafe functions can no longer be coerced to closures.
5839 * Various obscure macros such as `log_syntax!` are now behind feature gates.
5840 * The `#[simd]` attribute is now behind a feature gate.
5841 * Visibility is no longer allowed on `extern crate` statements, and
5842 unnecessary visibility (`priv`) is no longer allowed on `use` statements.
5843 * Trailing commas are now allowed in argument lists and tuple patterns.
5844 * The `do` keyword has been removed, it is now a reserved keyword.
5845 * Default type parameters have been implemented, but are feature gated.
5846 * Borrowed variables through captures in closures are now considered soundly.
5847 * `extern mod` is now `extern crate`
5848 * The `Freeze` trait has been removed.
5849 * The `Share` trait has been added for types that can be shared among
5851 * Labels in macros are now hygienic.
5852 * Expression/statement macro invocations can be delimited with `{}` now.
5853 * Treatment of types allowed in `static mut` locations has been tweaked.
5854 * The `*` and `.` operators are now overloadable through the `Deref` and
5856 * `~Trait` and `proc` no longer have `Send` bounds by default.
5857 * Partial type hints are now supported with the `_` type marker.
5858 * An `Unsafe` type was introduced for interior mutability. It is now
5859 considered undefined to transmute from `&T` to `&mut T` without using the
5861 * The #[linkage] attribute was implemented for extern statics/functions.
5862 * The inner attribute syntax has changed from `#[foo];` to `#![foo]`.
5863 * `Pod` was renamed to `Copy`.
5866 * The `libextra` library has been removed. It has now been decomposed into
5867 component libraries with smaller and more focused nuggets of
5868 functionality. The full list of libraries can be found on the
5869 documentation index page.
5870 * std: `std::condition` has been removed. All I/O errors are now propagated
5871 through the `Result` type. In order to assist with error handling, a
5872 `try!` macro for unwrapping errors with an early return and a lint for
5873 unused results has been added. See #12039 for more information.
5874 * std: The `vec` module has been renamed to `slice`.
5875 * std: A new vector type, `Vec<T>`, has been added in preparation for DST.
5876 This will become the only growable vector in the future.
5877 * std: `std::io` now has more public re-exports. Types such as `BufferedReader`
5878 are now found at `std::io::BufferedReader` instead of
5879 `std::io::buffered::BufferedReader`.
5880 * std: `print` and `println` are no longer in the prelude, the `print!` and
5881 `println!` macros are intended to be used instead.
5882 * std: `Rc` now has a `Weak` pointer for breaking cycles, and it no longer
5883 attempts to statically prevent cycles.
5884 * std: The standard distribution is adopting the policy of pushing failure
5885 to the user rather than failing in libraries. Many functions (such as
5886 `slice::last()`) now return `Option<T>` instead of `T` + failing.
5887 * std: `fmt::Default` has been renamed to `fmt::Show`, and it now has a new
5888 deriving mode: `#[deriving(Show)]`.
5889 * std: `ToStr` is now implemented for all types implementing `Show`.
5890 * std: The formatting trait methods now take `&self` instead of `&T`
5891 * std: The `invert()` method on iterators has been renamed to `rev()`
5892 * std: `std::num` has seen a reduction in the genericity of its traits,
5893 consolidating functionality into a few core traits.
5894 * std: Backtraces are now printed on task failure if the environment
5895 variable `RUST_BACKTRACE` is present.
5896 * std: Naming conventions for iterators have been standardized. More details
5897 can be found on the wiki's style guide.
5898 * std: `eof()` has been removed from the `Reader` trait. Specific types may
5899 still implement the function.
5900 * std: Networking types are now cloneable to allow simultaneous reads/writes.
5901 * std: `assert_approx_eq!` has been removed
5902 * std: The `e` and `E` formatting specifiers for floats have been added to
5903 print them in exponential notation.
5904 * std: The `Times` trait has been removed
5905 * std: Indications of variance and opting out of builtin bounds is done
5906 through marker types in `std::kinds::marker` now
5907 * std: `hash` has been rewritten, `IterBytes` has been removed, and
5908 `#[deriving(Hash)]` is now possible.
5909 * std: `SharedChan` has been removed, `Sender` is now cloneable.
5910 * std: `Chan` and `Port` were renamed to `Sender` and `Receiver`.
5911 * std: `Chan::new` is now `channel()`.
5912 * std: A new synchronous channel type has been implemented.
5913 * std: A `select!` macro is now provided for selecting over `Receiver`s.
5914 * std: `hashmap` and `trie` have been moved to `libcollections`
5915 * std: `run` has been rolled into `io::process`
5916 * std: `assert_eq!` now uses `{}` instead of `{:?}`
5917 * std: The equality and comparison traits have seen some reorganization.
5918 * std: `rand` has moved to `librand`.
5919 * std: `to_{lower,upper}case` has been implemented for `char`.
5920 * std: Logging has been moved to `liblog`.
5921 * collections: `HashMap` has been rewritten for higher performance and less
5923 * native: The default runtime is now `libnative`. If `libgreen` is desired,
5924 it can be booted manually. The runtime guide has more information and
5926 * native: All I/O functionality except signals has been implemented.
5927 * green: Task spawning with `libgreen` has been optimized with stack caching
5928 and various trimming of code.
5929 * green: Tasks spawned by `libgreen` now have an unmapped guard page.
5930 * sync: The `extra::sync` module has been updated to modern rust (and moved
5931 to the `sync` library), tweaking and improving various interfaces while
5932 dropping redundant functionality.
5933 * sync: A new `Barrier` type has been added to the `sync` library.
5934 * sync: An efficient mutex for native and green tasks has been implemented.
5935 * serialize: The `base64` module has seen some improvement. It treats
5936 newlines better, has non-string error values, and has seen general
5938 * fourcc: A `fourcc!` macro was introduced
5939 * hexfloat: A `hexfloat!` macro was implemented for specifying floats via a
5940 hexadecimal literal.
5943 * `rustpkg` has been deprecated and removed from the main repository. Its
5944 replacement, `cargo`, is under development.
5945 * Nightly builds of rust are now available
5946 * The memory usage of rustc has been improved many times throughout this
5948 * The build process supports disabling rpath support for the rustc binary
5950 * Code generation has improved in some cases, giving more information to the
5951 LLVM optimization passes to enable more extensive optimizations.
5952 * Debuginfo compatibility with lldb on OSX has been restored.
5953 * The master branch is now gated on an android bot, making building for
5954 android much more reliable.
5955 * Output flags have been centralized into one `--emit` flag.
5956 * Crate type flags have been centralized into one `--crate-type` flag.
5957 * Codegen flags have been consolidated behind a `-C` flag.
5958 * Linking against outdated crates now has improved error messages.
5959 * Error messages with lifetimes will often suggest how to annotate the
5960 function to fix the error.
5961 * Many more types are documented in the standard library, and new guides
5963 * Many `rustdoc` improvements:
5964 * code blocks are syntax highlighted.
5965 * render standalone markdown files.
5966 * the --test flag tests all code blocks by default.
5967 * exported macros are displayed.
5968 * re-exported types have their documentation inlined at the location of the
5970 * search works across crates that have been rendered to the same output
5974 Version 0.9 (2014-01-09)
5975 ==========================
5977 * ~1800 changes, numerous bugfixes
5980 * The `float` type has been removed. Use `f32` or `f64` instead.
5981 * A new facility for enabling experimental features (feature gating) has
5982 been added, using the crate-level `#[feature(foo)]` attribute.
5983 * Managed boxes (@) are now behind a feature gate
5984 (`#[feature(managed_boxes)]`) in preparation for future removal. Use the
5985 standard library's `Gc` or `Rc` types instead.
5986 * `@mut` has been removed. Use `std::cell::{Cell, RefCell}` instead.
5987 * Jumping back to the top of a loop is now done with `continue` instead of
5989 * Strings can no longer be mutated through index assignment.
5990 * Raw strings can be created via the basic `r"foo"` syntax or with matched
5991 hash delimiters, as in `r###"foo"###`.
5992 * `~fn` is now written `proc (args) -> retval { ... }` and may only be
5994 * The `&fn` type is now written `|args| -> ret` to match the literal form.
5995 * `@fn`s have been removed.
5996 * `do` only works with procs in order to make it obvious what the cost
5998 * Single-element tuple-like structs can no longer be dereferenced to
5999 obtain the inner value. A more comprehensive solution for overloading
6000 the dereference operator will be provided in the future.
6001 * The `#[link(...)]` attribute has been replaced with
6002 `#[crate_id = "name#vers"]`.
6003 * Empty `impl`s must be terminated with empty braces and may not be
6004 terminated with a semicolon.
6005 * Keywords are no longer allowed as lifetime names; the `self` lifetime
6006 no longer has any special meaning.
6007 * The old `fmt!` string formatting macro has been removed.
6008 * `printf!` and `printfln!` (old-style formatting) removed in favor of
6009 `print!` and `println!`.
6010 * `mut` works in patterns now, as in `let (mut x, y) = (1, 2);`.
6011 * The `extern mod foo (name = "bar")` syntax has been removed. Use
6012 `extern mod foo = "bar"` instead.
6013 * New reserved keywords: `alignof`, `offsetof`, `sizeof`.
6014 * Macros can have attributes.
6015 * Macros can expand to items with attributes.
6016 * Macros can expand to multiple items.
6017 * The `asm!` macro is feature-gated (`#[feature(asm)]`).
6018 * Comments may be nested.
6019 * Values automatically coerce to trait objects they implement, without
6021 * Enum discriminants are no longer an entire word but as small as needed to
6022 contain all the variants. The `repr` attribute can be used to override
6023 the discriminant size, as in `#[repr(int)]` for integer-sized, and
6024 `#[repr(C)]` to match C enums.
6025 * Non-string literals are not allowed in attributes (they never worked).
6026 * The FFI now supports variadic functions.
6027 * Octal numeric literals, as in `0o7777`.
6028 * The `concat!` syntax extension performs compile-time string concatenation.
6029 * The `#[fixed_stack_segment]` and `#[rust_stack]` attributes have been
6030 removed as Rust no longer uses segmented stacks.
6031 * Non-ascii identifiers are feature-gated (`#[feature(non_ascii_idents)]`).
6032 * Ignoring all fields of an enum variant or tuple-struct is done with `..`,
6033 not `*`; ignoring remaining fields of a struct is also done with `..`,
6034 not `_`; ignoring a slice of a vector is done with `..`, not `.._`.
6035 * `rustc` supports the "win64" calling convention via `extern "win64"`.
6036 * `rustc` supports the "system" calling convention, which defaults to the
6037 preferred convention for the target platform, "stdcall" on 32-bit Windows,
6039 * The `type_overflow` lint (default: warn) checks literals for overflow.
6040 * The `unsafe_block` lint (default: allow) checks for usage of `unsafe`.
6041 * The `attribute_usage` lint (default: warn) warns about unknown
6043 * The `unknown_features` lint (default: warn) warns about unknown
6045 * The `dead_code` lint (default: warn) checks for dead code.
6046 * Rust libraries can be linked statically to one another
6047 * `#[link_args]` is behind the `link_args` feature gate.
6048 * Native libraries are now linked with `#[link(name = "foo")]`
6049 * Native libraries can be statically linked to a rust crate
6050 (`#[link(name = "foo", kind = "static")]`).
6051 * Native OS X frameworks are now officially supported
6052 (`#[link(name = "foo", kind = "framework")]`).
6053 * The `#[thread_local]` attribute creates thread-local (not task-local)
6054 variables. Currently behind the `thread_local` feature gate.
6055 * The `return` keyword may be used in closures.
6056 * Types that can be copied via a memcpy implement the `Pod` kind.
6057 * The `cfg` attribute can now be used on struct fields and enum variants.
6060 * std: The `option` and `result` API's have been overhauled to make them
6061 simpler, more consistent, and more composable.
6062 * std: The entire `std::io` module has been replaced with one that is
6063 more comprehensive and that properly interfaces with the underlying
6064 scheduler. File, TCP, UDP, Unix sockets, pipes, and timers are all
6066 * std: `io::util` contains a number of useful implementations of
6067 `Reader` and `Writer`, including `NullReader`, `NullWriter`,
6068 `ZeroReader`, `TeeReader`.
6069 * std: The reference counted pointer type `extra::rc` moved into std.
6070 * std: The `Gc` type in the `gc` module will replace `@` (it is currently
6071 just a wrapper around it).
6072 * std: The `Either` type has been removed.
6073 * std: `fmt::Default` can be implemented for any type to provide default
6074 formatting to the `format!` macro, as in `format!("{}", myfoo)`.
6075 * std: The `rand` API continues to be tweaked.
6076 * std: The `rust_begin_unwind` function, useful for inserting breakpoints
6077 on failure in gdb, is now named `rust_fail`.
6078 * std: The `each_key` and `each_value` methods on `HashMap` have been
6079 replaced by the `keys` and `values` iterators.
6080 * std: Functions dealing with type size and alignment have moved from the
6081 `sys` module to the `mem` module.
6082 * std: The `path` module was written and API changed.
6083 * std: `str::from_utf8` has been changed to cast instead of allocate.
6084 * std: `starts_with` and `ends_with` methods added to vectors via the
6085 `ImmutableEqVector` trait, which is in the prelude.
6086 * std: Vectors can be indexed with the `get_opt` method, which returns `None`
6087 if the index is out of bounds.
6088 * std: Task failure no longer propagates between tasks, as the model was
6089 complex, expensive, and incompatible with thread-based tasks.
6090 * std: The `Any` type can be used for dynamic typing.
6091 * std: `~Any` can be passed to the `fail!` macro and retrieved via
6093 * std: Methods that produce iterators generally do not have an `_iter`
6095 * std: `cell::Cell` and `cell::RefCell` can be used to introduce mutability
6096 roots (mutable fields, etc.). Use instead of e.g. `@mut`.
6097 * std: `util::ignore` renamed to `prelude::drop`.
6098 * std: Slices have `sort` and `sort_by` methods via the `MutableVector`
6100 * std: `vec::raw` has seen a lot of cleanup and API changes.
6101 * std: The standard library no longer includes any C++ code, and very
6102 minimal C, eliminating the dependency on libstdc++.
6103 * std: Runtime scheduling and I/O functionality has been factored out into
6104 extensible interfaces and is now implemented by two different crates:
6105 libnative, for native threading and I/O; and libgreen, for green threading
6106 and I/O. This paves the way for using the standard library in more limited
6107 embedded environments.
6108 * std: The `comm` module has been rewritten to be much faster, have a
6109 simpler, more consistent API, and to work for both native and green
6111 * std: All libuv dependencies have been moved into the rustuv crate.
6112 * native: New implementations of runtime scheduling on top of OS threads.
6113 * native: New native implementations of TCP, UDP, file I/O, process spawning,
6115 * green: The green thread scheduler and message passing types are almost
6117 * extra: The `flatpipes` module had bitrotted and was removed.
6118 * extra: All crypto functions have been removed and Rust now has a policy of
6119 not reimplementing crypto in the standard library. In the future crypto
6120 will be provided by external crates with bindings to established libraries.
6121 * extra: `c_vec` has been modernized.
6122 * extra: The `sort` module has been removed. Use the `sort` method on
6126 * The `rust` and `rusti` commands have been removed, due to lack of
6128 * `rustdoc` was completely rewritten.
6129 * `rustdoc` can test code examples in documentation.
6130 * `rustpkg` can test packages with the argument, 'test'.
6131 * `rustpkg` supports arbitrary dependencies, including C libraries.
6132 * `rustc`'s support for generating debug info is improved again.
6133 * `rustc` has better error reporting for unbalanced delimiters.
6134 * `rustc`'s JIT support was removed due to bitrot.
6135 * Executables and static libraries can be built with LTO (-Z lto)
6136 * `rustc` adds a `--dep-info` flag for communicating dependencies to
6140 Version 0.8 (2013-09-26)
6141 ============================
6143 * ~2200 changes, numerous bugfixes
6146 * The `for` loop syntax has changed to work with the `Iterator` trait.
6147 * At long last, unwinding works on Windows.
6148 * Default methods are ready for use.
6149 * Many trait inheritance bugs fixed.
6150 * Owned and borrowed trait objects work more reliably.
6151 * `copy` is no longer a keyword. It has been replaced by the `Clone` trait.
6152 * rustc can omit emission of code for the `debug!` macro if it is passed
6154 * mod.rs is now "blessed". When loading `mod foo;`, rustc will now look
6155 for foo.rs, then foo/mod.rs, and will generate an error when both are
6157 * Strings no longer contain trailing nulls. The new `std::c_str` module
6158 provides new mechanisms for converting to C strings.
6159 * The type of foreign functions is now `extern "C" fn` instead of `*u8'.
6160 * The FFI has been overhauled such that foreign functions are called directly,
6161 instead of through a stack-switching wrapper.
6162 * Calling a foreign function must be done through a Rust function with the
6163 `#[fixed_stack_segment]` attribute.
6164 * The `externfn!` macro can be used to declare both a foreign function and
6165 a `#[fixed_stack_segment]` wrapper at once.
6166 * `pub` and `priv` modifiers on `extern` blocks are no longer parsed.
6167 * `unsafe` is no longer allowed on extern fns - they are all unsafe.
6168 * `priv` is disallowed everywhere except for struct fields and enum variants.
6169 * `&T` (besides `&'static T`) is no longer allowed in `@T`.
6170 * `ref` bindings in irrefutable patterns work correctly now.
6171 * `char` is now prevented from containing invalid code points.
6172 * Casting to `bool` is no longer allowed.
6173 * `\0` is now accepted as an escape in chars and strings.
6174 * `yield` is a reserved keyword.
6175 * `typeof` is a reserved keyword.
6176 * Crates may be imported by URL with `extern mod foo = "url";`.
6177 * Explicit enum discriminants may be given as uints as in `enum E { V = 0u }`
6178 * Static vectors can be initialized with repeating elements,
6179 e.g. `static foo: [u8, .. 100]: [0, .. 100];`.
6180 * Static structs can be initialized with functional record update,
6181 e.g. `static foo: Foo = Foo { a: 5, .. bar };`.
6182 * `cfg!` can be used to conditionally execute code based on the crate
6183 configuration, similarly to `#[cfg(...)]`.
6184 * The `unnecessary_qualification` lint detects unneeded module
6185 prefixes (default: allow).
6186 * Arithmetic operations have been implemented on the SIMD types in
6187 `std::unstable::simd`.
6188 * Exchange allocation headers were removed, reducing memory usage.
6189 * `format!` implements a completely new, extensible, and higher-performance
6190 string formatting system. It will replace `fmt!`.
6191 * `print!` and `println!` write formatted strings (using the `format!`
6192 extension) to stdout.
6193 * `write!` and `writeln!` write formatted strings (using the `format!`
6194 extension) to the new Writers in `std::rt::io`.
6195 * The library section in which a function or static is placed may
6196 be specified with `#[link_section = "..."]`.
6197 * The `proto!` syntax extension for defining bounded message protocols
6199 * `macro_rules!` is hygienic for `let` declarations.
6200 * The `#[export_name]` attribute specifies the name of a symbol.
6201 * `unreachable!` can be used to indicate unreachable code, and fails
6205 * std: Transitioned to the new runtime, written in Rust.
6206 * std: Added an experimental I/O library, `rt::io`, based on the new
6208 * std: A new generic `range` function was added to the prelude, replacing
6209 `uint::range` and friends.
6210 * std: `range_rev` no longer exists. Since range is an iterator it can be
6211 reversed with `range(lo, hi).invert()`.
6212 * std: The `chain` method on option renamed to `and_then`; `unwrap_or_default`
6213 renamed to `unwrap_or`.
6214 * std: The `iterator` module was renamed to `iter`.
6215 * std: Integral types now support the `checked_add`, `checked_sub`, and
6216 `checked_mul` operations for detecting overflow.
6217 * std: Many methods in `str`, `vec`, `option, `result` were renamed for
6219 * std: Methods are standardizing on conventions for casting methods:
6220 `to_foo` for copying, `into_foo` for moving, `as_foo` for temporary
6222 * std: The `CString` type in `c_str` provides new ways to convert to and
6224 * std: `DoubleEndedIterator` can yield elements in two directions.
6225 * std: The `mut_split` method on vectors partitions an `&mut [T]` into
6227 * std: `str::from_bytes` renamed to `str::from_utf8`.
6228 * std: `pop_opt` and `shift_opt` methods added to vectors.
6229 * std: The task-local data interface no longer uses @, and keys are
6230 no longer function pointers.
6231 * std: The `swap_unwrap` method of `Option` renamed to `take_unwrap`.
6232 * std: Added `SharedPort` to `comm`.
6233 * std: `Eq` has a default method for `ne`; only `eq` is required
6235 * std: `Ord` has default methods for `le`, `gt` and `ge`; only `lt`
6236 is required in implementations.
6237 * std: `is_utf8` performance is improved, impacting many string functions.
6238 * std: `os::MemoryMap` provides cross-platform mmap.
6239 * std: `ptr::offset` is now unsafe, but also more optimized. Offsets that
6240 are not 'in-bounds' are considered undefined.
6241 * std: Many freestanding functions in `vec` removed in favor of methods.
6242 * std: Many freestanding functions on scalar types removed in favor of
6244 * std: Many options to task builders were removed since they don't make
6245 sense in the new scheduler design.
6246 * std: More containers implement `FromIterator` so can be created by the
6248 * std: More complete atomic types in `unstable::atomics`.
6249 * std: `comm::PortSet` removed.
6250 * std: Mutating methods in the `Set` and `Map` traits have been moved into
6251 the `MutableSet` and `MutableMap` traits. `Container::is_empty`,
6252 `Map::contains_key`, `MutableMap::insert`, and `MutableMap::remove` have
6253 default implementations.
6254 * std: Various `from_str` functions were removed in favor of a generic
6255 `from_str` which is available in the prelude.
6256 * std: `util::unreachable` removed in favor of the `unreachable!` macro.
6257 * extra: `dlist`, the doubly-linked list was modernized.
6258 * extra: Added a `hex` module with `ToHex` and `FromHex` traits.
6259 * extra: Added `glob` module, replacing `std::os::glob`.
6260 * extra: `rope` was removed.
6261 * extra: `deque` was renamed to `ringbuf`. `RingBuf` implements `Deque`.
6262 * extra: `net`, and `timer` were removed. The experimental replacements
6263 are `std::rt::io::net` and `std::rt::io::timer`.
6264 * extra: Iterators implemented for `SmallIntMap`.
6265 * extra: Iterators implemented for `Bitv` and `BitvSet`.
6266 * extra: `SmallIntSet` removed. Use `BitvSet`.
6267 * extra: Performance of JSON parsing greatly improved.
6268 * extra: `semver` updated to SemVer 2.0.0.
6269 * extra: `term` handles more terminals correctly.
6270 * extra: `dbg` module removed.
6271 * extra: `par` module removed.
6272 * extra: `future` was cleaned up, with some method renames.
6273 * extra: Most free functions in `getopts` were converted to methods.
6276 * rustc's debug info generation (`-Z debug-info`) is greatly improved.
6277 * rustc accepts `--target-cpu` to compile to a specific CPU architecture,
6278 similarly to gcc's `--march` flag.
6279 * rustc's performance compiling small crates is much better.
6280 * rustpkg has received many improvements.
6281 * rustpkg supports git tags as package IDs.
6282 * rustpkg builds into target-specific directories so it can be used for
6284 * The number of concurrent test tasks is controlled by the environment
6285 variable RUST_TEST_TASKS.
6286 * The test harness can now report metrics for benchmarks.
6287 * All tools have man pages.
6288 * Programs compiled with `--test` now support the `-h` and `--help` flags.
6289 * The runtime uses jemalloc for allocations.
6290 * Segmented stacks are temporarily disabled as part of the transition to
6291 the new runtime. Stack overflows are possible!
6292 * A new documentation backend, rustdoc_ng, is available for use. It is
6293 still invoked through the normal `rustdoc` command.
6296 Version 0.7 (2013-07-03)
6297 =======================
6299 * ~2000 changes, numerous bugfixes
6302 * `impl`s no longer accept a visibility qualifier. Put them on methods
6304 * The borrow checker has been rewritten with flow-sensitivity, fixing
6305 many bugs and inconveniences.
6306 * The `self` parameter no longer implicitly means `&'self self`,
6307 and can be explicitly marked with a lifetime.
6308 * Overloadable compound operators (`+=`, etc.) have been temporarily
6309 removed due to bugs.
6310 * The `for` loop protocol now requires `for`-iterators to return `bool`
6311 so they compose better.
6312 * The `Durable` trait is replaced with the `'static` bounds.
6313 * Trait default methods work more often.
6314 * Structs with the `#[packed]` attribute have byte alignment and
6315 no padding between fields.
6316 * Type parameters bound by `Copy` must now be copied explicitly with
6318 * It is now illegal to move out of a dereferenced unsafe pointer.
6319 * `Option<~T>` is now represented as a nullable pointer.
6320 * `@mut` does dynamic borrow checks correctly.
6321 * The `main` function is only detected at the topmost level of the crate.
6322 The `#[main]` attribute is still valid anywhere.
6323 * Struct fields may no longer be mutable. Use inherited mutability.
6324 * The `#[no_send]` attribute makes a type that would otherwise be
6326 * The `#[no_freeze]` attribute makes a type that would otherwise be
6328 * Unbounded recursion will abort the process after reaching the limit
6329 specified by the `RUST_MAX_STACK` environment variable (default: 1GB).
6330 * The `vecs_implicitly_copyable` lint mode has been removed. Vectors
6331 are never implicitly copyable.
6332 * `#[static_assert]` makes compile-time assertions about static bools.
6333 * At long last, 'argument modes' no longer exist.
6334 * The rarely used `use mod` statement no longer exists.
6337 * `fail!` and `assert!` accept `~str`, `&'static str` or `fmt!`-style
6339 * `Encodable`, `Decodable`, `Ord`, `TotalOrd`, `TotalEq`, `DeepClone`,
6340 `Rand`, `Zero` and `ToStr` can all be automatically derived with
6342 * The `bytes!` macro returns a vector of bytes for string, u8, char,
6343 and unsuffixed integer literals.
6346 * The `core` crate was renamed to `std`.
6347 * The `std` crate was renamed to `extra`.
6348 * More and improved documentation.
6349 * std: `iterator` module for external iterator objects.
6350 * Many old-style (internal, higher-order function) iterators replaced by
6351 implementations of `Iterator`.
6352 * std: Many old internal vector and string iterators,
6353 incl. `any`, `all`. removed.
6354 * std: The `finalize` method of `Drop` renamed to `drop`.
6355 * std: The `drop` method now takes `&mut self` instead of `&self`.
6356 * std: The prelude no longer re-exports any modules, only types and traits.
6357 * std: Prelude additions: `print`, `println`, `FromStr`, `ApproxEq`, `Equiv`,
6358 `Iterator`, `IteratorUtil`, many numeric traits, many tuple traits.
6359 * std: New numeric traits: `Fractional`, `Real`, `RealExt`, `Integer`, `Ratio`,
6360 `Algebraic`, `Trigonometric`, `Exponential`, `Primitive`.
6361 * std: Tuple traits and accessors defined for up to 12-tuples, e.g.
6362 `(0, 1, 2).n2()` or `(0, 1, 2).n2_ref()`.
6363 * std: Many types implement `Clone`.
6364 * std: `path` type renamed to `Path`.
6365 * std: `mut` module and `Mut` type removed.
6366 * std: Many standalone functions removed in favor of methods and iterators
6367 in `vec`, `str`. In the future methods will also work as functions.
6368 * std: `reinterpret_cast` removed. Use `transmute`.
6369 * std: ascii string handling in `std::ascii`.
6370 * std: `Rand` is implemented for ~/@.
6371 * std: `run` module for spawning processes overhauled.
6372 * std: Various atomic types added to `unstable::atomic`.
6373 * std: Various types implement `Zero`.
6374 * std: `LinearMap` and `LinearSet` renamed to `HashMap` and `HashSet`.
6375 * std: Borrowed pointer functions moved from `ptr` to `borrow`.
6376 * std: Added `os::mkdir_recursive`.
6377 * std: Added `os::glob` function performs filesystems globs.
6378 * std: `FuzzyEq` renamed to `ApproxEq`.
6379 * std: `Map` now defines `pop` and `swap` methods.
6380 * std: `Cell` constructors converted to static methods.
6381 * extra: `rc` module adds the reference counted pointers, `Rc` and `RcMut`.
6382 * extra: `flate` module moved from `std` to `extra`.
6383 * extra: `fileinput` module for iterating over a series of files.
6384 * extra: `Complex` number type and `complex` module.
6385 * extra: `Rational` number type and `rational` module.
6386 * extra: `BigInt`, `BigUint` implement numeric and comparison traits.
6387 * extra: `term` uses terminfo now, is more correct.
6388 * extra: `arc` functions converted to methods.
6389 * extra: Implementation of fixed output size variations of SHA-2.
6392 * `unused_variable` lint mode for unused variables (default: warn).
6393 * `unused_unsafe` lint mode for detecting unnecessary `unsafe` blocks
6395 * `unused_mut` lint mode for identifying unused `mut` qualifiers
6397 * `dead_assignment` lint mode for unread variables (default: warn).
6398 * `unnecessary_allocation` lint mode detects some heap allocations that are
6399 immediately borrowed so could be written without allocating (default: warn).
6400 * `missing_doc` lint mode (default: allow).
6401 * `unreachable_code` lint mode (default: warn).
6402 * The `rusti` command has been rewritten and a number of bugs addressed.
6403 * rustc outputs in color on more terminals.
6404 * rustc accepts a `--link-args` flag to pass arguments to the linker.
6405 * rustc accepts a `-Z print-link-args` flag for debugging linkage.
6406 * Compiling with `-g` will make the binary record information about
6407 dynamic borrowcheck failures for debugging.
6408 * rustdoc has a nicer stylesheet.
6409 * Various improvements to rustdoc.
6410 * Improvements to rustpkg (see the detailed release notes).
6413 Version 0.6 (2013-04-03)
6414 ========================
6416 * ~2100 changes, numerous bugfixes
6419 * The self type parameter in traits is now spelled `Self`
6420 * The `self` parameter in trait and impl methods must now be explicitly
6421 named (for example: `fn f(&self) { }`). Implicit self is deprecated.
6422 * Static methods no longer require the `static` keyword and instead
6423 are distinguished by the lack of a `self` parameter
6424 * Replaced the `Durable` trait with the `'static` lifetime
6425 * The old closure type syntax with the trailing sigil has been
6426 removed in favor of the more consistent leading sigil
6427 * `super` is a keyword, and may be prefixed to paths
6428 * Trait bounds are separated with `+` instead of whitespace
6429 * Traits are implemented with `impl Trait for Type`
6430 instead of `impl Type: Trait`
6431 * Lifetime syntax is now `&'l foo` instead of `&l/foo`
6432 * The `export` keyword has finally been removed
6433 * The `move` keyword has been removed (see "Semantic changes")
6434 * The interior mutability qualifier on vectors, `[mut T]`, has been
6435 removed. Use `&mut [T]`, etc.
6436 * `mut` is no longer valid in `~mut T`. Use inherited mutability
6437 * `fail` is no longer a keyword. Use `fail!()`
6438 * `assert` is no longer a keyword. Use `assert!()`
6439 * `log` is no longer a keyword. use `debug!`, etc.
6440 * 1-tuples may be represented as `(T,)`
6441 * Struct fields may no longer be `mut`. Use inherited mutability,
6442 `@mut T`, `core::mut` or `core::cell`
6443 * `extern mod { ... }` is no longer valid syntax for foreign
6444 function modules. Use extern blocks: `extern { ... }`
6445 * Newtype enums removed. Use tuple-structs.
6446 * Trait implementations no longer support visibility modifiers
6447 * Pattern matching over vectors improved and expanded
6448 * `const` renamed to `static` to correspond to lifetime name,
6449 and make room for future `static mut` unsafe mutable globals.
6450 * Replaced `#[deriving_eq]` with `#[deriving(Eq)]`, etc.
6451 * `Clone` implementations can be automatically generated with
6452 `#[deriving(Clone)]`
6453 * Casts to traits must use a pointer sigil, e.g. `@foo as @Bar`
6454 instead of `foo as Bar`.
6455 * Fixed length vector types are now written as `[int, .. 3]`
6456 instead of `[int * 3]`.
6457 * Fixed length vector types can express the length as a constant
6458 expression. (ex: `[int, .. GL_BUFFER_SIZE - 2]`)
6461 * Types with owned pointers or custom destructors move by default,
6462 eliminating the `move` keyword
6463 * All foreign functions are considered unsafe
6464 * &mut is now unaliasable
6465 * Writes to borrowed @mut pointers are prevented dynamically
6467 * The name of the main function can be customized using #[main]
6468 * The default type of an inferred closure is &fn instead of @fn
6469 * `use` statements may no longer be "chained" - they cannot import
6470 identifiers imported by previous `use` statements
6471 * `use` statements are crate relative, importing from the "top"
6472 of the crate by default. Paths may be prefixed with `super::`
6473 or `self::` to change the search behavior.
6474 * Method visibility is inherited from the implementation declaration
6475 * Structural records have been removed
6476 * Many more types can be used in static items, including enums
6477 'static-lifetime pointers and vectors
6478 * Pattern matching over vectors improved and expanded
6479 * Typechecking of closure types has been overhauled to
6480 improve inference and eliminate unsoundness
6481 * Macros leave scope at the end of modules, unless that module is
6482 tagged with #[macro_escape]
6485 * Added big integers to `std::bigint`
6486 * Removed `core::oldcomm` module
6487 * Added pipe-based `core::comm` module
6488 * Numeric traits have been reorganized under `core::num`
6489 * `vec::slice` finally returns a slice
6490 * `debug!` and friends don't require a format string, e.g. `debug!(Foo)`
6491 * Containers reorganized around traits in `core::container`
6492 * `core::dvec` removed, `~[T]` is a drop-in replacement
6493 * `core::send_map` renamed to `core::hashmap`
6494 * `std::map` removed; replaced with `core::hashmap`
6495 * `std::treemap` reimplemented as an owned balanced tree
6496 * `std::deque` and `std::smallintmap` reimplemented as owned containers
6497 * `core::trie` added as a fast ordered map for integer keys
6498 * Set types added to `core::hashmap`, `core::trie` and `std::treemap`
6499 * `Ord` split into `Ord` and `TotalOrd`. `Ord` is still used to
6500 overload the comparison operators, whereas `TotalOrd` is used
6501 by certain container types
6504 * Replaced the 'cargo' package manager with 'rustpkg'
6505 * Added all-purpose 'rust' tool
6506 * `rustc --test` now supports benchmarks with the `#[bench]` attribute
6507 * rustc now *attempts* to offer spelling suggestions
6508 * Improved support for ARM and Android
6509 * Preliminary MIPS backend
6510 * Improved foreign function ABI implementation for x86, x86_64
6511 * Various memory usage improvements
6512 * Rust code may be embedded in foreign code under limited circumstances
6513 * Inline assembler supported by new asm!() syntax extension.
6516 Version 0.5 (2012-12-21)
6517 ===========================
6519 * ~900 changes, numerous bugfixes
6522 * Removed `<-` move operator
6523 * Completed the transition from the `#fmt` extension syntax to `fmt!`
6524 * Removed old fixed length vector syntax - `[T]/N`
6525 * New token-based quasi-quoters, `quote_tokens!`, `quote_expr!`, etc.
6526 * Macros may now expand to items and statements
6527 * `a.b()` is always parsed as a method call, never as a field projection
6528 * `Eq` and `IterBytes` implementations can be automatically generated
6529 with `#[deriving_eq]` and `#[deriving_iter_bytes]` respectively
6530 * Removed the special crate language for `.rc` files
6531 * Function arguments may consist of any irrefutable pattern
6534 * `&` and `~` pointers may point to objects
6535 * Tuple structs - `struct Foo(Bar, Baz)`. Will replace newtype enums.
6536 * Enum variants may be structs
6537 * Destructors can be added to all nominal types with the Drop trait
6538 * Structs and nullary enum variants may be constants
6539 * Values that cannot be implicitly copied are now automatically moved
6540 without writing `move` explicitly
6541 * `&T` may now be coerced to `*T`
6542 * Coercions happen in `let` statements as well as function calls
6543 * `use` statements now take crate-relative paths
6544 * The module and type namespaces have been merged so that static
6545 method names can be resolved under the trait in which they are
6548 * Improved support for language features
6549 * Trait inheritance works in many scenarios
6550 * More support for explicit self arguments in methods - `self`, `&self`
6551 `@self`, and `~self` all generally work as expected
6552 * Static methods work in more situations
6553 * Experimental: Traits may declare default methods for the implementations
6557 * New condition handling system in `core::condition`
6558 * Timsort added to `std::sort`
6559 * New priority queue, `std::priority_queue`
6560 * Pipes for serializable types, `std::flatpipes'
6561 * Serialization overhauled to be trait-based
6562 * Expanded `getopts` definitions
6563 * Moved futures to `std`
6564 * More functions are pure now
6565 * `core::comm` renamed to `oldcomm`. Still deprecated
6566 * `rustdoc` and `cargo` are libraries now
6569 * Added a preliminary REPL, `rusti`
6570 * License changed from MIT to dual MIT/APL2
6573 Version 0.4 (2012-10-15)
6574 ==========================
6576 * ~2000 changes, numerous bugfixes
6579 * All keywords are now strict and may not be used as identifiers anywhere
6580 * Keyword removal: 'again', 'import', 'check', 'new', 'owned', 'send',
6581 'of', 'with', 'to', 'class'.
6582 * Classes are replaced with simpler structs
6583 * Explicit method self types
6584 * `ret` became `return` and `alt` became `match`
6585 * `import` is now `use`; `use is now `extern mod`
6586 * `extern mod { ... }` is now `extern { ... }`
6587 * `use mod` is the recommended way to import modules
6588 * `pub` and `priv` replace deprecated export lists
6589 * The syntax of `match` pattern arms now uses fat arrow (=>)
6590 * `main` no longer accepts an args vector; use `os::args` instead
6593 * Trait implementations are now coherent, ala Haskell typeclasses
6594 * Trait methods may be static
6595 * Argument modes are deprecated
6596 * Borrowed pointers are much more mature and recommended for use
6597 * Strings and vectors in the static region are stored in constant memory
6598 * Typestate was removed
6599 * Resolution rewritten to be more reliable
6600 * Support for 'dual-mode' data structures (freezing and thawing)
6603 * Most binary operators can now be overloaded via the traits in
6605 * `std::net::url` for representing URLs
6606 * Sendable hash maps in `core::send_map`
6607 * `core::task' gained a (currently unsafe) task-local storage API
6610 * An efficient new intertask communication primitive called the pipe,
6611 along with a number of higher-level channel types, in `core::pipes`
6612 * `std::arc`, an atomically reference counted, immutable, shared memory
6614 * `std::sync`, various exotic synchronization tools based on arcs and pipes
6615 * Futures are now based on pipes and sendable
6616 * More robust linked task failure
6617 * Improved task builder API
6620 * Improved error reporting
6621 * Preliminary JIT support
6622 * Preliminary work on precise GC
6623 * Extensive architectural improvements to rustc
6624 * Begun a transition away from buggy C++-based reflection (shape) code to
6625 Rust-based (visitor) code
6626 * All hash functions and tables converted to secure, randomized SipHash
6629 Version 0.3 (2012-07-12)
6630 ========================
6632 * ~1900 changes, numerous bugfixes
6634 * New coding conveniences
6635 * Integer-literal suffix inference
6636 * Per-item control over warnings, errors
6637 * #[cfg(windows)] and #[cfg(unix)] attributes
6638 * Documentation comments
6639 * More compact closure syntax
6640 * 'do' expressions for treating higher-order functions as
6642 * *-patterns (wildcard extended to all constructor fields)
6645 * Name resolution pass and exhaustiveness checker rewritten
6646 * Region pointers and borrow checking supersede alias
6648 * Init-ness checking is now provided by a region-based liveness
6649 pass instead of the typestate pass; same for last-use analysis
6650 * Extensive work on region pointers
6652 * Experimental new language features
6653 * Slices and fixed-size, interior-allocated vectors
6654 * #!-comments for lang versioning, shell execution
6655 * Destructors and iface implementation for classes;
6656 type-parameterized classes and class methods
6657 * 'const' type kind for types that can be used to implement
6658 shared-memory concurrency patterns
6662 * Removal of various obsolete features
6663 * Keywords: 'be', 'prove', 'syntax', 'note', 'mutable', 'bind',
6664 'crust', 'native' (now 'extern'), 'cont' (now 'again')
6666 * Constructs: do-while loops ('do' repurposed), fn binding,
6667 resources (replaced by destructors)
6669 * Compiler reorganization
6670 * Syntax-layer of compiler split into separate crate
6671 * Clang (from LLVM project) integrated into build
6672 * Typechecker split into sub-modules
6675 * New time functions
6676 * Extension methods for many built-in types
6677 * Arc: atomic-refcount read-only / exclusive-use shared cells
6678 * Par: parallel map and search routines
6679 * Extensive work on libuv interface
6680 * Much vector code moved to libraries
6681 * Syntax extensions: #line, #col, #file, #mod, #stringify,
6682 #include, #include_str, #include_bin
6685 * Cargo automatically resolves dependencies
6688 Version 0.2 (2012-03-29)
6689 =========================
6691 * >1500 changes, numerous bugfixes
6693 * New docs and doc tooling
6695 * New port: FreeBSD x86_64
6697 * Compilation model enhancements
6698 * Generics now specialized, multiply instantiated
6699 * Functions now inlined across separate crates
6701 * Scheduling, stack and threading fixes
6702 * Noticeably improved message-passing performance
6703 * Explicit schedulers
6707 * Experimental new language features
6708 * Operator overloading
6712 * Various language extensions
6713 * C-callback function types: 'crust fn ...'
6714 * Infinite-loop construct: 'loop { ... }'
6715 * Shorten 'mutable' to 'mut'
6716 * Required mutable-local qualifier: 'let mut ...'
6717 * Basic glob-exporting: 'export foo::*;'
6718 * Alt now exhaustive, 'alt check' for runtime-checked
6719 * Block-function form of 'for' loop, with 'break' and 'ret'.
6722 * AST quasi-quote syntax extension
6723 * Revived libuv interface
6724 * New modules: core::{future, iter}, std::arena
6725 * Merged per-platform std::{os*, fs*} to core::{libc, os}
6726 * Extensive cleanup, regularization in libstd, libcore
6729 Version 0.1 (2012-01-20)
6730 ===============================
6732 * Most language features work, including:
6733 * Unique pointers, unique closures, move semantics
6734 * Interface-constrained generics
6735 * Static interface dispatch
6737 * Multithread task scheduling
6738 * Typestate predicates
6739 * Failure unwinding, destructors
6740 * Pattern matching and destructuring assignment
6741 * Lightweight block-lambda syntax
6742 * Preliminary macro-by-example
6744 * Compiler works with the following configurations:
6745 * Linux: x86 and x86_64 hosts and targets
6746 * macOS: x86 and x86_64 hosts and targets
6747 * Windows: x86 hosts and targets
6749 * Cross compilation / multi-target configuration supported.
6751 * Preliminary API-documentation and package-management tools included.
6755 * Documentation is incomplete.
6757 * Performance is below intended target.
6759 * Standard library APIs are subject to extensive change, reorganization.
6761 * Language-level versioning is not yet operational - future code will