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 ignore the target triple specified in a project
31 directory's `.cargo/config`.][cargo/5606]
32 - [`cargo-install` will now allow you to cross compile an install
33 using `--target`][cargo/5614]
34 - [Added the `cargo-fix` to automatically move project code from 2015 edition
39 - [`rustdoc` now has the `--cap-lints` which allows you to set what level of
40 lint will cause and compilation failure.][52354]
41 - [`rustc` and `rustdoc` will now have the exit code of one if compilation
42 fails, and 101 if there is a panic.][52197]
46 - [`str::{slice_unchecked, slice_unchecked_mut}` are now deprecated.][51807]
47 Use `str::get_unchecked(begin..end)` instead.
48 - [`std::env::home_dir` is now deprecated for it's unintuitive behaviour.][51656]
49 Consider using the `home_dir` function from
50 https://crates.io/crates/dirs instead.
51 - [`rustc` will no longer silently ignore invalid data in target spec.][52330]
53 [52861]: https://github.com/rust-lang/rust/pull/52861/
54 [52656]: https://github.com/rust-lang/rust/pull/52656/
55 [52239]: https://github.com/rust-lang/rust/pull/52239/
56 [52330]: https://github.com/rust-lang/rust/pull/52330/
57 [52354]: https://github.com/rust-lang/rust/pull/52354/
58 [52402]: https://github.com/rust-lang/rust/pull/52402/
59 [52103]: https://github.com/rust-lang/rust/pull/52103/
60 [52197]: https://github.com/rust-lang/rust/pull/52197/
61 [51807]: https://github.com/rust-lang/rust/pull/51807/
62 [51899]: https://github.com/rust-lang/rust/pull/51899/
63 [51912]: https://github.com/rust-lang/rust/pull/51912/
64 [51511]: https://github.com/rust-lang/rust/pull/51511/
65 [51619]: https://github.com/rust-lang/rust/pull/51619/
66 [51656]: https://github.com/rust-lang/rust/pull/51656/
67 [51178]: https://github.com/rust-lang/rust/pull/51178/
68 [50494]: https://github.com/rust-lang/rust/pull/50494/
69 [cargo/5606]: https://github.com/rust-lang/cargo/pull/5606/
70 [cargo/5614]: https://github.com/rust-lang/cargo/pull/5614/
71 [cargo/5723]: https://github.com/rust-lang/cargo/pull/5723/
72 [cargo/5831]: https://github.com/rust-lang/cargo/pull/5831/
73 [`Arc::downcast`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.downcast
74 [`Iterator::flatten`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.flatten
75 [`Rc::downcast`]: https://doc.rust-lang.org/std/sync/struct.Rc.html#method.downcast
78 Version 1.28.0 (2018-08-02)
79 ===========================
83 - [The `#[repr(transparent)]` attribute is now stable.][51562] This attribute
84 allows a Rust newtype wrapper (`struct NewType<T>(T);`) to be represented as
85 the inner type across Foreign Function Interface (FFI) boundaries.
86 - [The keywords `pure`, `sizeof`, `alignof`, and `offsetof` have been unreserved
87 and can now be used as identifiers.][51196]
88 - [The `GlobalAlloc` trait and `#[global_allocator]` attribute are now
89 stable.][51241] This will allow users to specify a global allocator for
91 - [Unit test functions marked with the `#[test]` attribute can now return
92 `Result<(), E: Debug>` in addition to `()`.][51298]
93 - [The `lifetime` specifier for `macro_rules!` is now stable.][50385] This
94 allows macros to easily target lifetimes.
98 - [The `s` and `z` optimisation levels are now stable.][50265] These optimisations
99 prioritise making smaller binary sizes. `z` is the same as `s` with the
100 exception that it does not vectorise loops, which typically results in an even
102 - [The short error format is now stable.][49546] Specified with
103 `--error-format=short` this option will provide a more compressed output of
105 - [Added a lint warning when you have duplicated `macro_export`s.][50143]
106 - [Reduced the number of allocations in the macro parser.][50855] This can
107 improve compile times of macro heavy crates on average by 5%.
111 - [Implemented `Default` for `&mut str`.][51306]
112 - [Implemented `From<bool>` for all integer and unsigned number types.][50554]
113 - [Implemented `Extend` for `()`.][50234]
114 - [The `Debug` implementation of `time::Duration` should now be more easily
115 human readable.][50364] Previously a `Duration` of one second would printed as
116 `Duration { secs: 1, nanos: 0 }` and will now be printed as `1s`.
117 - [Implemented `From<&String>` for `Cow<str>`, `From<&Vec<T>>` for `Cow<[T]>`,
118 `From<Cow<CStr>>` for `CString`, `From<CString>, From<CStr>, From<&CString>`
119 for `Cow<CStr>`, `From<OsString>, From<OsStr>, From<&OsString>` for
120 `Cow<OsStr>`, `From<&PathBuf>` for `Cow<Path>`, and `From<Cow<Path>>`
121 for `PathBuf`.][50170]
122 - [Implemented `Shl` and `Shr` for `Wrapping<u128>`
123 and `Wrapping<i128>`.][50465]
124 - [`DirEntry::metadata` now uses `fstatat` instead of `lstat` when
125 possible.][51050] This can provide up to a 40% speed increase.
126 - [Improved error messages when using `format!`.][50610]
130 - [`Iterator::step_by`]
131 - [`Path::ancestors`]
132 - [`SystemTime::UNIX_EPOCH`]
133 - [`alloc::GlobalAlloc`]
135 - [`alloc::LayoutErr`]
138 - [`alloc::alloc_zeroed`]
141 - [`alloc::handle_alloc_error`]
142 - [`btree_map::Entry::or_default`]
144 - [`hash_map::Entry::or_default`]
145 - [`iter::repeat_with`]
146 - [`num::NonZeroUsize`]
147 - [`num::NonZeroU128`]
148 - [`num::NonZeroU16`]
149 - [`num::NonZeroU32`]
150 - [`num::NonZeroU64`]
152 - [`ops::RangeBounds`]
153 - [`slice::SliceIndex`]
154 - [`slice::from_mut`]
155 - [`slice::from_ref`]
156 - [`{Any + Send + Sync}::downcast_mut`]
157 - [`{Any + Send + Sync}::downcast_ref`]
158 - [`{Any + Send + Sync}::is`]
162 - [Cargo will now no longer allow you to publish crates with build scripts that
163 modify the `src` directory.][cargo/5584] The `src` directory in a crate should be
164 considered to be immutable.
168 - [The `suggestion_applicability` field in `rustc`'s json output is now
169 stable.][50486] This will allow dev tools to check whether a code suggestion
174 - [Rust will consider trait objects with duplicated constraints to be the same
175 type as without the duplicated constraint.][51276] For example the below code will
181 fn test(&self) { println!("one"); } //~ ERROR duplicate definitions with name `test`
184 impl Trait + Send + Send {
185 fn test(&self) { println!("two"); }
189 [49546]: https://github.com/rust-lang/rust/pull/49546/
190 [50143]: https://github.com/rust-lang/rust/pull/50143/
191 [50170]: https://github.com/rust-lang/rust/pull/50170/
192 [50234]: https://github.com/rust-lang/rust/pull/50234/
193 [50265]: https://github.com/rust-lang/rust/pull/50265/
194 [50364]: https://github.com/rust-lang/rust/pull/50364/
195 [50385]: https://github.com/rust-lang/rust/pull/50385/
196 [50465]: https://github.com/rust-lang/rust/pull/50465/
197 [50486]: https://github.com/rust-lang/rust/pull/50486/
198 [50554]: https://github.com/rust-lang/rust/pull/50554/
199 [50610]: https://github.com/rust-lang/rust/pull/50610/
200 [50855]: https://github.com/rust-lang/rust/pull/50855/
201 [51050]: https://github.com/rust-lang/rust/pull/51050/
202 [51196]: https://github.com/rust-lang/rust/pull/51196/
203 [51200]: https://github.com/rust-lang/rust/pull/51200/
204 [51241]: https://github.com/rust-lang/rust/pull/51241/
205 [51276]: https://github.com/rust-lang/rust/pull/51276/
206 [51298]: https://github.com/rust-lang/rust/pull/51298/
207 [51306]: https://github.com/rust-lang/rust/pull/51306/
208 [51562]: https://github.com/rust-lang/rust/pull/51562/
209 [cargo/5584]: https://github.com/rust-lang/cargo/pull/5584/
210 [`Iterator::step_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.step_by
211 [`Path::ancestors`]: https://doc.rust-lang.org/std/path/struct.Path.html#method.ancestors
212 [`SystemTime::UNIX_EPOCH`]: https://doc.rust-lang.org/std/time/struct.SystemTime.html#associatedconstant.UNIX_EPOCH
213 [`alloc::GlobalAlloc`]: https://doc.rust-lang.org/std/alloc/trait.GlobalAlloc.html
214 [`alloc::Layout`]: https://doc.rust-lang.org/std/alloc/struct.Layout.html
215 [`alloc::LayoutErr`]: https://doc.rust-lang.org/std/alloc/struct.LayoutErr.html
216 [`alloc::System`]: https://doc.rust-lang.org/std/alloc/struct.System.html
217 [`alloc::alloc`]: https://doc.rust-lang.org/std/alloc/fn.alloc.html
218 [`alloc::alloc_zeroed`]: https://doc.rust-lang.org/std/alloc/fn.alloc_zeroed.html
219 [`alloc::dealloc`]: https://doc.rust-lang.org/std/alloc/fn.dealloc.html
220 [`alloc::realloc`]: https://doc.rust-lang.org/std/alloc/fn.realloc.html
221 [`alloc::handle_alloc_error`]: https://doc.rust-lang.org/std/alloc/fn.handle_alloc_error.html
222 [`btree_map::Entry::or_default`]: https://doc.rust-lang.org/std/collections/btree_map/enum.Entry.html#method.or_default
223 [`fmt::Alignment`]: https://doc.rust-lang.org/std/fmt/enum.Alignment.html
224 [`hash_map::Entry::or_default`]: https://doc.rust-lang.org/std/collections/btree_map/enum.Entry.html#method.or_default
225 [`iter::repeat_with`]: https://doc.rust-lang.org/std/iter/fn.repeat_with.html
226 [`num::NonZeroUsize`]: https://doc.rust-lang.org/std/num/struct.NonZeroUsize.html
227 [`num::NonZeroU128`]: https://doc.rust-lang.org/std/num/struct.NonZeroU128.html
228 [`num::NonZeroU16`]: https://doc.rust-lang.org/std/num/struct.NonZeroU16.html
229 [`num::NonZeroU32`]: https://doc.rust-lang.org/std/num/struct.NonZeroU32.html
230 [`num::NonZeroU64`]: https://doc.rust-lang.org/std/num/struct.NonZeroU64.html
231 [`num::NonZeroU8`]: https://doc.rust-lang.org/std/num/struct.NonZeroU8.html
232 [`ops::RangeBounds`]: https://doc.rust-lang.org/std/ops/trait.RangeBounds.html
233 [`slice::SliceIndex`]: https://doc.rust-lang.org/std/slice/trait.SliceIndex.html
234 [`slice::from_mut`]: https://doc.rust-lang.org/std/slice/fn.from_mut.html
235 [`slice::from_ref`]: https://doc.rust-lang.org/std/slice/fn.from_ref.html
236 [`{Any + Send + Sync}::downcast_mut`]: https://doc.rust-lang.org/std/any/trait.Any.html#method.downcast_mut-2
237 [`{Any + Send + Sync}::downcast_ref`]: https://doc.rust-lang.org/std/any/trait.Any.html#method.downcast_ref-2
238 [`{Any + Send + Sync}::is`]: https://doc.rust-lang.org/std/any/trait.Any.html#method.is-2
240 Version 1.27.2 (2018-07-20)
241 ===========================
246 - The borrow checker was fixed to avoid potential unsoundness when using
247 match ergonomics: [#52213][52213].
249 [52213]: https://github.com/rust-lang/rust/issues/52213
251 Version 1.27.1 (2018-07-10)
252 ===========================
257 - rustdoc would execute plugins in the /tmp/rustdoc/plugins directory
258 when running, which enabled executing code as some other user on a
259 given machine. This release fixes that vulnerability; you can read
260 more about this on the [blog][rustdoc-sec]. The associated CVE is [CVE-2018-1000622].
262 Thank you to Red Hat for responsibily disclosing this vulnerability to us.
267 - The borrow checker was fixed to avoid an additional potential unsoundness when using
268 match ergonomics: [#51415][51415], [#49534][49534].
270 [51415]: https://github.com/rust-lang/rust/issues/51415
271 [49534]: https://github.com/rust-lang/rust/issues/49534
272 [rustdoc-sec]: https://blog.rust-lang.org/2018/07/06/security-advisory-for-rustdoc.html
273 [CVE-2018-1000622]: https://cve.mitre.org/cgi-bin/cvename.cgi?name=%20CVE-2018-1000622
275 Version 1.27.0 (2018-06-21)
276 ==========================
280 - [Removed 'proc' from the reserved keywords list.][49699] This allows `proc` to
281 be used as an identifier.
282 - [The dyn syntax is now available.][49968] This syntax is equivalent to the
283 bare `Trait` syntax, and should make it clearer when being used in tandem with
284 `impl Trait`. Since it is equivalent to the following syntax:
285 `&Trait == &dyn Trait`, `&mut Trait == &mut dyn Trait`, and
286 `Box<Trait> == Box<dyn Trait>`.
287 - [Attributes on generic parameters such as types and lifetimes are
288 now stable.][48851] e.g.
289 `fn foo<#[lifetime_attr] 'a, #[type_attr] T: 'a>() {}`
290 - [The `#[must_use]` attribute can now also be used on functions as well as
291 types.][48925] It provides a lint that by default warns users when the
292 value returned by a function has not been used.
296 - [Added the `armv5te-unknown-linux-musleabi` target.][50423]
300 - [SIMD (Single Instruction Multiple Data) on x86/x86_64 is now stable.][49664]
301 This includes [`arch::x86`] & [`arch::x86_64`] modules which contain
302 SIMD intrinsics, a new macro called `is_x86_feature_detected!`, the
303 `#[target_feature(enable="")]` attribute, and adding `target_feature = ""` to
305 - [A lot of methods for `[u8]`, `f32`, and `f64` previously only available in
306 std are now available in core.][49896]
307 - [The generic `Rhs` type parameter on `ops::{Shl, ShlAssign, Shr}` now defaults
309 - [`std::str::replace` now has the `#[must_use]` attribute][50177] to clarify
310 that the operation isn't done in place.
311 - [`Clone::clone`, `Iterator::collect`, and `ToOwned::to_owned` now have
312 the `#[must_use]` attribute][49533] to warn about unused potentially
313 expensive allocations.
317 - [`DoubleEndedIterator::rfind`]
318 - [`DoubleEndedIterator::rfold`]
319 - [`DoubleEndedIterator::try_rfold`]
320 - [`Duration::from_micros`]
321 - [`Duration::from_nanos`]
322 - [`Duration::subsec_micros`]
323 - [`Duration::subsec_millis`]
324 - [`HashMap::remove_entry`]
325 - [`Iterator::try_fold`]
326 - [`Iterator::try_for_each`]
329 - [`String::replace_range`]
330 - [`Take::set_limit`]
331 - [`hint::unreachable_unchecked`]
332 - [`os::unix::process::parent_id`]
333 - [`ptr::swap_nonoverlapping`]
334 - [`slice::rsplit_mut`]
336 - [`slice::swap_with_slice`]
340 - [`cargo-metadata` now includes `authors`, `categories`, `keywords`,
341 `readme`, and `repository` fields.][cargo/5386]
342 - [`cargo-metadata` now includes a package's `metadata` table.][cargo/5360]
343 - [Added the `--target-dir` optional argument.][cargo/5393] This allows you to specify
344 a different directory than `target` for placing compilation artifacts.
345 - [Cargo will be adding automatic target inference for binaries, benchmarks,
346 examples, and tests in the Rust 2018 edition.][cargo/5335] If your project specifies
347 specific targets e.g. using `[[bin]]` and have other binaries in locations
348 where cargo would infer a binary, Cargo will produce a warning. You can
349 disable this feature ahead of time by setting any of the following `autobins`,
350 `autobenches`, `autoexamples`, `autotests` to false.
351 - [Cargo will now cache compiler information.][cargo/5359] This can be disabled by
352 setting `CARGO_CACHE_RUSTC_INFO=0` in your environment.
356 - [Added “The Rustc book” into the official documentation.][49707]
357 [“The Rustc book”] documents and teaches how to use the rustc compiler.
358 - [All books available on `doc.rust-lang.org` are now searchable.][49623]
362 - [Calling a `CharExt` or `StrExt` method directly on core will no longer
363 work.][49896] e.g. `::core::prelude::v1::StrExt::is_empty("")` will not
364 compile, `"".is_empty()` will still compile.
365 - [`Debug` output on `atomic::{AtomicBool, AtomicIsize, AtomicPtr, AtomicUsize}`
366 will only print the inner type.][48553] e.g.
367 `print!("{:?}", AtomicBool::new(true))` will print `true`
368 not `AtomicBool(true)`.
369 - [The maximum number for `repr(align(N))` is now 2²⁹.][50378] Previously you
370 could enter higher numbers but they were not supported by LLVM. Up to 512MB
371 alignment should cover all use cases.
373 [48553]: https://github.com/rust-lang/rust/pull/48553/
374 [48851]: https://github.com/rust-lang/rust/pull/48851/
375 [48925]: https://github.com/rust-lang/rust/pull/48925/
376 [49533]: https://github.com/rust-lang/rust/pull/49533/
377 [49623]: https://github.com/rust-lang/rust/pull/49623/
378 [49630]: https://github.com/rust-lang/rust/pull/49630/
379 [49664]: https://github.com/rust-lang/rust/pull/49664/
380 [49699]: https://github.com/rust-lang/rust/pull/49699/
381 [49707]: https://github.com/rust-lang/rust/pull/49707/
382 [49719]: https://github.com/rust-lang/rust/pull/49719/
383 [49896]: https://github.com/rust-lang/rust/pull/49896/
384 [49968]: https://github.com/rust-lang/rust/pull/49968/
385 [50177]: https://github.com/rust-lang/rust/pull/50177/
386 [50378]: https://github.com/rust-lang/rust/pull/50378/
387 [50398]: https://github.com/rust-lang/rust/pull/50398/
388 [50423]: https://github.com/rust-lang/rust/pull/50423/
389 [cargo/5203]: https://github.com/rust-lang/cargo/pull/5203/
390 [cargo/5335]: https://github.com/rust-lang/cargo/pull/5335/
391 [cargo/5359]: https://github.com/rust-lang/cargo/pull/5359/
392 [cargo/5360]: https://github.com/rust-lang/cargo/pull/5360/
393 [cargo/5386]: https://github.com/rust-lang/cargo/pull/5386/
394 [cargo/5393]: https://github.com/rust-lang/cargo/pull/5393/
395 [`DoubleEndedIterator::rfind`]: https://doc.rust-lang.org/std/iter/trait.DoubleEndedIterator.html#method.rfind
396 [`DoubleEndedIterator::rfold`]: https://doc.rust-lang.org/std/iter/trait.DoubleEndedIterator.html#method.rfold
397 [`DoubleEndedIterator::try_rfold`]: https://doc.rust-lang.org/std/iter/trait.DoubleEndedIterator.html#method.try_rfold
398 [`Duration::from_micros`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.from_micros
399 [`Duration::from_nanos`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.from_nanos
400 [`Duration::subsec_micros`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.subsec_micros
401 [`Duration::subsec_millis`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.subsec_millis
402 [`HashMap::remove_entry`]: https://doc.rust-lang.org/std/collections/struct.HashMap.html#method.remove_entry
403 [`Iterator::try_fold`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.try_fold
404 [`Iterator::try_for_each`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.try_for_each
405 [`NonNull::cast`]: https://doc.rust-lang.org/std/ptr/struct.NonNull.html#method.cast
406 [`Option::filter`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.filter
407 [`String::replace_range`]: https://doc.rust-lang.org/std/string/struct.String.html#method.replace_range
408 [`Take::set_limit`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.set_limit
409 [`hint::unreachable_unchecked`]: https://doc.rust-lang.org/std/hint/fn.unreachable_unchecked.html
410 [`os::unix::process::parent_id`]: https://doc.rust-lang.org/std/os/unix/process/fn.parent_id.html
411 [`process::id`]: https://doc.rust-lang.org/std/process/fn.id.html
412 [`ptr::swap_nonoverlapping`]: https://doc.rust-lang.org/std/ptr/fn.swap_nonoverlapping.html
413 [`slice::rsplit_mut`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rsplit_mut
414 [`slice::rsplit`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rsplit
415 [`slice::swap_with_slice`]: https://doc.rust-lang.org/std/primitive.slice.html#method.swap_with_slice
416 [`arch::x86_64`]: https://doc.rust-lang.org/std/arch/x86_64/index.html
417 [`arch::x86`]: https://doc.rust-lang.org/std/arch/x86/index.html
418 [“The Rustc book”]: https://doc.rust-lang.org/rustc
421 Version 1.26.2 (2018-06-05)
422 ==========================
427 - [The borrow checker was fixed to avoid unsoundness when using match ergonomics][51117]
429 [51117]: https://github.com/rust-lang/rust/issues/51117
432 Version 1.26.1 (2018-05-29)
433 ==========================
438 - [RLS now works on Windows][50646]
439 - [Rustfmt stopped badly formatting text in some cases][rustfmt/2695]
445 - [`fn main() -> impl Trait` no longer works for non-Termination
447 This reverts an accidental stabilization.
448 - [`NaN > NaN` no longer returns true in const-fn contexts][50812]
449 - [Prohibit using turbofish for `impl Trait` in method arguments][50950]
451 [50646]: https://github.com/rust-lang/rust/issues/50646
452 [50656]: https://github.com/rust-lang/rust/pull/50656
453 [50812]: https://github.com/rust-lang/rust/pull/50812
454 [50950]: https://github.com/rust-lang/rust/issues/50950
455 [rustfmt/2695]: https://github.com/rust-lang-nursery/rustfmt/issues/2695
457 Version 1.26.0 (2018-05-10)
458 ==========================
462 - [Closures now implement `Copy` and/or `Clone` if all captured variables
463 implement either or both traits.][49299]
464 - [The inclusive range syntax e.g. `for x in 0..=10` is now stable.][47813]
465 - [The `'_` lifetime is now stable. The underscore lifetime can be used anywhere where a
466 lifetime can be elided.][49458]
467 - [`impl Trait` is now stable allowing you to have abstract types in returns
468 or in function parameters.][49255] e.g. `fn foo() -> impl Iterator<Item=u8>` or
469 `fn open(path: impl AsRef<Path>)`.
470 - [Pattern matching will now automatically apply dereferences.][49394]
471 - [128-bit integers in the form of `u128` and `i128` are now stable.][49101]
472 - [`main` can now return `Result<(), E: Debug>`][49162] in addition to `()`.
473 - [A lot of operations are now available in a const context.][46882] E.g. You
474 can now index into constant arrays, reference and dereference into constants,
475 and use Tuple struct constructors.
476 - [Fixed entry slice patterns are now stable.][48516] e.g.
478 let points = [1, 2, 3, 4];
480 [1, 2, 3, 4] => println!("All points were sequential."),
481 _ => println!("Not all points were sequential."),
488 - [LLD is now used as the default linker for `wasm32-unknown-unknown`.][48125]
489 - [Fixed exponential projection complexity on nested types.][48296]
490 This can provide up to a ~12% reduction in compile times for certain crates.
491 - [Added the `--remap-path-prefix` option to rustc.][48359] Allowing you
492 to remap path prefixes outputted by the compiler.
493 - [Added `powerpc-unknown-netbsd` target.][48281]
497 - [Implemented `From<u16> for usize` & `From<{u8, i16}> for isize`.][49305]
498 - [Added hexadecimal formatting for integers with fmt::Debug][48978]
499 e.g. `assert!(format!("{:02x?}", b"Foo\0") == "[46, 6f, 6f, 00]")`
500 - [Implemented `Default, Hash` for `cmp::Reverse`.][48628]
501 - [Optimized `str::repeat` being 8x faster in large cases.][48657]
502 - [`ascii::escape_default` is now available in libcore.][48735]
503 - [Trailing commas are now supported in std and core macros.][48056]
504 - [Implemented `Copy, Clone` for `cmp::Reverse`][47379]
505 - [Implemented `Clone` for `char::{ToLowercase, ToUppercase}`.][48629]
510 - [`*const T::copy_to_nonoverlapping`]
511 - [`*const T::copy_to`]
512 - [`*const T::read_unaligned`]
513 - [`*const T::read_volatile`]
516 - [`*const T::wrapping_add`]
517 - [`*const T::wrapping_sub`]
519 - [`*mut T::copy_to_nonoverlapping`]
520 - [`*mut T::copy_to`]
521 - [`*mut T::read_unaligned`]
522 - [`*mut T::read_volatile`]
524 - [`*mut T::replace`]
527 - [`*mut T::wrapping_add`]
528 - [`*mut T::wrapping_sub`]
529 - [`*mut T::write_bytes`]
530 - [`*mut T::write_unaligned`]
531 - [`*mut T::write_volatile`]
534 - [`FromUtf8Error::as_bytes`]
535 - [`LocalKey::try_with`]
537 - [`btree_map::Entry::and_modify`]
538 - [`fs::read_to_string`]
541 - [`hash_map::Entry::and_modify`]
542 - [`iter::FusedIterator`]
543 - [`ops::RangeInclusive`]
544 - [`ops::RangeToInclusive`]
546 - [`slice::rotate_left`]
547 - [`slice::rotate_right`]
553 - [Cargo will now output path to custom commands when `-v` is
554 passed with `--list`][cargo/5041]
555 - [The Cargo binary version is now the same as the Rust version][cargo/5083]
559 - [The second edition of "The Rust Programming Language" book is now recommended
560 over the first.][48404]
565 - [aliasing a `Fn` trait as `dyn` no longer works.][48481] E.g. the following
566 syntax is now invalid.
568 use std::ops::Fn as dyn;
569 fn g(_: Box<dyn(std::fmt::Debug)>) {}
571 - [The result of dereferences are no longer promoted to `'static`.][47408]
575 const PAIR: &(i32, i32) = &(0, 1);
576 let _reversed_pair: &'static _ = &(PAIR.1, PAIR.0); // Doesn't work
579 - [Deprecate `AsciiExt` trait in favor of inherent methods.][49109]
580 - [`".e0"` will now no longer parse as `0.0` and will instead cause
582 - [Removed hoedown from rustdoc.][48274]
583 - [Bounds on higher-kinded lifetimes a hard error.][48326]
585 [46882]: https://github.com/rust-lang/rust/pull/46882
586 [47379]: https://github.com/rust-lang/rust/pull/47379
587 [47408]: https://github.com/rust-lang/rust/pull/47408
588 [47813]: https://github.com/rust-lang/rust/pull/47813
589 [48056]: https://github.com/rust-lang/rust/pull/48056
590 [48125]: https://github.com/rust-lang/rust/pull/48125
591 [48166]: https://github.com/rust-lang/rust/pull/48166
592 [48235]: https://github.com/rust-lang/rust/pull/48235
593 [48274]: https://github.com/rust-lang/rust/pull/48274
594 [48281]: https://github.com/rust-lang/rust/pull/48281
595 [48296]: https://github.com/rust-lang/rust/pull/48296
596 [48326]: https://github.com/rust-lang/rust/pull/48326
597 [48359]: https://github.com/rust-lang/rust/pull/48359
598 [48404]: https://github.com/rust-lang/rust/pull/48404
599 [48481]: https://github.com/rust-lang/rust/pull/48481
600 [48516]: https://github.com/rust-lang/rust/pull/48516
601 [48628]: https://github.com/rust-lang/rust/pull/48628
602 [48629]: https://github.com/rust-lang/rust/pull/48629
603 [48657]: https://github.com/rust-lang/rust/pull/48657
604 [48735]: https://github.com/rust-lang/rust/pull/48735
605 [48978]: https://github.com/rust-lang/rust/pull/48978
606 [49101]: https://github.com/rust-lang/rust/pull/49101
607 [49109]: https://github.com/rust-lang/rust/pull/49109
608 [49121]: https://github.com/rust-lang/rust/pull/49121
609 [49162]: https://github.com/rust-lang/rust/pull/49162
610 [49184]: https://github.com/rust-lang/rust/pull/49184
611 [49234]: https://github.com/rust-lang/rust/pull/49234
612 [49255]: https://github.com/rust-lang/rust/pull/49255
613 [49299]: https://github.com/rust-lang/rust/pull/49299
614 [49305]: https://github.com/rust-lang/rust/pull/49305
615 [49394]: https://github.com/rust-lang/rust/pull/49394
616 [49458]: https://github.com/rust-lang/rust/pull/49458
617 [`*const T::add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.add
618 [`*const T::copy_to_nonoverlapping`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to_nonoverlapping
619 [`*const T::copy_to`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to
620 [`*const T::read_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_unaligned
621 [`*const T::read_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_volatile
622 [`*const T::read`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read
623 [`*const T::sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.sub
624 [`*const T::wrapping_add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_add
625 [`*const T::wrapping_sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_sub
626 [`*mut T::add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.add-1
627 [`*mut T::copy_to_nonoverlapping`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to_nonoverlapping-1
628 [`*mut T::copy_to`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to-1
629 [`*mut T::read_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_unaligned-1
630 [`*mut T::read_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_volatile-1
631 [`*mut T::read`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read-1
632 [`*mut T::replace`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.replace
633 [`*mut T::sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.sub-1
634 [`*mut T::swap`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.swap
635 [`*mut T::wrapping_add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_add-1
636 [`*mut T::wrapping_sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_sub-1
637 [`*mut T::write_bytes`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_bytes
638 [`*mut T::write_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_unaligned
639 [`*mut T::write_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_volatile
640 [`*mut T::write`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write
641 [`Box::leak`]: https://doc.rust-lang.org/std/boxed/struct.Box.html#method.leak
642 [`FromUtf8Error::as_bytes`]: https://doc.rust-lang.org/std/string/struct.FromUtf8Error.html#method.as_bytes
643 [`LocalKey::try_with`]: https://doc.rust-lang.org/std/thread/struct.LocalKey.html#method.try_with
644 [`Option::cloned`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.cloned
645 [`btree_map::Entry::and_modify`]: https://doc.rust-lang.org/std/collections/btree_map/enum.Entry.html#method.and_modify
646 [`fs::read_to_string`]: https://doc.rust-lang.org/std/fs/fn.read_to_string.html
647 [`fs::read`]: https://doc.rust-lang.org/std/fs/fn.read.html
648 [`fs::write`]: https://doc.rust-lang.org/std/fs/fn.write.html
649 [`hash_map::Entry::and_modify`]: https://doc.rust-lang.org/std/collections/hash_map/enum.Entry.html#method.and_modify
650 [`iter::FusedIterator`]: https://doc.rust-lang.org/std/iter/trait.FusedIterator.html
651 [`ops::RangeInclusive`]: https://doc.rust-lang.org/std/ops/struct.RangeInclusive.html
652 [`ops::RangeToInclusive`]: https://doc.rust-lang.org/std/ops/struct.RangeToInclusive.html
653 [`process::id`]: https://doc.rust-lang.org/std/process/fn.id.html
654 [`slice::rotate_left`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rotate_left
655 [`slice::rotate_right`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rotate_right
656 [`String::retain`]: https://doc.rust-lang.org/std/string/struct.String.html#method.retain
657 [cargo/5041]: https://github.com/rust-lang/cargo/pull/5041
658 [cargo/5083]: https://github.com/rust-lang/cargo/pull/5083
661 Version 1.25.0 (2018-03-29)
662 ==========================
666 - [The `#[repr(align(x))]` attribute is now stable.][47006] [RFC 1358]
667 - [You can now use nested groups of imports.][47948]
668 e.g. `use std::{fs::File, io::Read, path::{Path, PathBuf}};`
669 - [You can now have `|` at the start of a match arm.][47947] e.g.
677 | Foo::B => println!("AB"),
678 | Foo::C => println!("C"),
685 - [Upgraded to LLVM 6.][47828]
686 - [Added `-C lto=val` option.][47521]
687 - [Added `i586-unknown-linux-musl` target][47282]
691 - [Impl Send for `process::Command` on Unix.][47760]
692 - [Impl PartialEq and Eq for `ParseCharError`.][47790]
693 - [`UnsafeCell::into_inner` is now safe.][47204]
694 - [Implement libstd for CloudABI.][47268]
695 - [`Float::{from_bits, to_bits}` is now available in libcore.][46931]
696 - [Implement `AsRef<Path>` for Component][46985]
697 - [Implemented `Write` for `Cursor<&mut Vec<u8>>`][46830]
698 - [Moved `Duration` to libcore.][46666]
702 - [`Location::column`]
705 The following functions can now be used in a constant expression.
706 eg. `static MINUTE: Duration = Duration::from_secs(60);`
707 - [`Duration::new`][47300]
708 - [`Duration::from_secs`][47300]
709 - [`Duration::from_millis`][47300]
713 - [`cargo new` no longer removes `rust` or `rs` prefixs/suffixs.][cargo/5013]
714 - [`cargo new` now defaults to creating a binary crate, instead of a
715 library crate.][cargo/5029]
719 - [Rust by example is now shipped with new releases][46196]
723 - [Deprecated `net::lookup_host`.][47510]
724 - [`rustdoc` has switched to pulldown as the default markdown renderer.][47398]
725 - The borrow checker was sometimes incorrectly permitting overlapping borrows
726 around indexing operations (see [#47349][47349]). This has been fixed (which also
727 enabled some correct code that used to cause errors (e.g. [#33903][33903] and [#46095][46095]).
728 - [Removed deprecated unstable attribute `#[simd]`.][47251]
730 [33903]: https://github.com/rust-lang/rust/pull/33903
731 [47947]: https://github.com/rust-lang/rust/pull/47947
732 [47948]: https://github.com/rust-lang/rust/pull/47948
733 [47760]: https://github.com/rust-lang/rust/pull/47760
734 [47790]: https://github.com/rust-lang/rust/pull/47790
735 [47828]: https://github.com/rust-lang/rust/pull/47828
736 [47398]: https://github.com/rust-lang/rust/pull/47398
737 [47510]: https://github.com/rust-lang/rust/pull/47510
738 [47521]: https://github.com/rust-lang/rust/pull/47521
739 [47204]: https://github.com/rust-lang/rust/pull/47204
740 [47251]: https://github.com/rust-lang/rust/pull/47251
741 [47268]: https://github.com/rust-lang/rust/pull/47268
742 [47282]: https://github.com/rust-lang/rust/pull/47282
743 [47300]: https://github.com/rust-lang/rust/pull/47300
744 [47349]: https://github.com/rust-lang/rust/pull/47349
745 [46931]: https://github.com/rust-lang/rust/pull/46931
746 [46985]: https://github.com/rust-lang/rust/pull/46985
747 [47006]: https://github.com/rust-lang/rust/pull/47006
748 [46830]: https://github.com/rust-lang/rust/pull/46830
749 [46095]: https://github.com/rust-lang/rust/pull/46095
750 [46666]: https://github.com/rust-lang/rust/pull/46666
751 [46196]: https://github.com/rust-lang/rust/pull/46196
752 [cargo/5013]: https://github.com/rust-lang/cargo/pull/5013
753 [cargo/5029]: https://github.com/rust-lang/cargo/pull/5029
754 [RFC 1358]: https://github.com/rust-lang/rfcs/pull/1358
755 [`Location::column`]: https://doc.rust-lang.org/std/panic/struct.Location.html#method.column
756 [`ptr::NonNull`]: https://doc.rust-lang.org/std/ptr/struct.NonNull.html
759 Version 1.24.1 (2018-03-01)
760 ==========================
762 - [Do not abort when unwinding through FFI][48251]
763 - [Emit UTF-16 files for linker arguments on Windows][48318]
764 - [Make the error index generator work again][48308]
765 - [Cargo will warn on Windows 7 if an update is needed][cargo/5069].
767 [48251]: https://github.com/rust-lang/rust/issues/48251
768 [48308]: https://github.com/rust-lang/rust/issues/48308
769 [48318]: https://github.com/rust-lang/rust/issues/48318
770 [cargo/5069]: https://github.com/rust-lang/cargo/pull/5069
773 Version 1.24.0 (2018-02-15)
774 ==========================
778 - [External `sysv64` ffi is now available.][46528]
779 eg. `extern "sysv64" fn foo () {}`
783 - [rustc now uses 16 codegen units by default for release builds.][46910]
784 For the fastest builds, utilize `codegen-units=1`.
785 - [Added `armv4t-unknown-linux-gnueabi` target.][47018]
786 - [Add `aarch64-unknown-openbsd` support][46760]
790 - [`str::find::<char>` now uses memchr.][46735] This should lead to a 10x
791 improvement in performance in the majority of cases.
792 - [`OsStr`'s `Debug` implementation is now lossless and consistent
793 with Windows.][46798]
794 - [`time::{SystemTime, Instant}` now implement `Hash`.][46828]
795 - [impl `From<bool>` for `AtomicBool`][46293]
796 - [impl `From<{CString, &CStr}>` for `{Arc<CStr>, Rc<CStr>}`][45990]
797 - [impl `From<{OsString, &OsStr}>` for `{Arc<OsStr>, Rc<OsStr>}`][45990]
798 - [impl `From<{PathBuf, &Path}>` for `{Arc<Path>, Rc<Path>}`][45990]
799 - [float::from_bits now just uses transmute.][46012] This provides
800 some optimisations from LLVM.
801 - [Copied `AsciiExt` methods onto `char`][46077]
802 - [Remove `T: Sized` requirement on `ptr::is_null()`][46094]
803 - [impl `From<RecvError>` for `{TryRecvError, RecvTimeoutError}`][45506]
804 - [Optimised `f32::{min, max}` to generate more efficient x86 assembly][47080]
805 - [`[u8]::contains` now uses memchr which provides a 3x speed improvement][46713]
809 - [`RefCell::replace`]
811 - [`atomic::spin_loop_hint`]
813 The following functions can now be used in a constant expression.
814 eg. `let buffer: [u8; size_of::<usize>()];`, `static COUNTER: AtomicUsize = AtomicUsize::new(1);`
816 - [`AtomicBool::new`][46287]
817 - [`AtomicUsize::new`][46287]
818 - [`AtomicIsize::new`][46287]
819 - [`AtomicPtr::new`][46287]
820 - [`Cell::new`][46287]
821 - [`{integer}::min_value`][46287]
822 - [`{integer}::max_value`][46287]
823 - [`mem::size_of`][46287]
824 - [`mem::align_of`][46287]
825 - [`ptr::null`][46287]
826 - [`ptr::null_mut`][46287]
827 - [`RefCell::new`][46287]
828 - [`UnsafeCell::new`][46287]
832 - [Added a `workspace.default-members` config that
833 overrides implied `--all` in virtual workspaces.][cargo/4743]
834 - [Enable incremental by default on development builds.][cargo/4817] Also added
835 configuration keys to `Cargo.toml` and `.cargo/config` to disable on a
836 per-project or global basis respectively.
843 - [Floating point types `Debug` impl now always prints a decimal point.][46831]
844 - [`Ipv6Addr` now rejects superfluous `::`'s in IPv6 addresses][46671] This is
845 in accordance with IETF RFC 4291 §2.2.
846 - [Unwinding will no longer go past FFI boundaries, and will instead abort.][46833]
847 - [`Formatter::flags` method is now deprecated.][46284] The `sign_plus`,
848 `sign_minus`, `alternate`, and `sign_aware_zero_pad` should be used instead.
849 - [Leading zeros in tuple struct members is now an error][47084]
850 - [`column!()` macro is one-based instead of zero-based][46977]
851 - [`fmt::Arguments` can no longer be shared across threads][45198]
852 - [Access to `#[repr(packed)]` struct fields is now unsafe][44884]
853 - [Cargo sets a different working directory for the compiler][cargo/4788]
855 [44884]: https://github.com/rust-lang/rust/pull/44884
856 [45198]: https://github.com/rust-lang/rust/pull/45198
857 [45506]: https://github.com/rust-lang/rust/pull/45506
858 [45904]: https://github.com/rust-lang/rust/pull/45904
859 [45990]: https://github.com/rust-lang/rust/pull/45990
860 [46012]: https://github.com/rust-lang/rust/pull/46012
861 [46077]: https://github.com/rust-lang/rust/pull/46077
862 [46094]: https://github.com/rust-lang/rust/pull/46094
863 [46284]: https://github.com/rust-lang/rust/pull/46284
864 [46287]: https://github.com/rust-lang/rust/pull/46287
865 [46293]: https://github.com/rust-lang/rust/pull/46293
866 [46528]: https://github.com/rust-lang/rust/pull/46528
867 [46671]: https://github.com/rust-lang/rust/pull/46671
868 [46713]: https://github.com/rust-lang/rust/pull/46713
869 [46735]: https://github.com/rust-lang/rust/pull/46735
870 [46749]: https://github.com/rust-lang/rust/pull/46749
871 [46760]: https://github.com/rust-lang/rust/pull/46760
872 [46798]: https://github.com/rust-lang/rust/pull/46798
873 [46828]: https://github.com/rust-lang/rust/pull/46828
874 [46831]: https://github.com/rust-lang/rust/pull/46831
875 [46833]: https://github.com/rust-lang/rust/pull/46833
876 [46910]: https://github.com/rust-lang/rust/pull/46910
877 [46977]: https://github.com/rust-lang/rust/pull/46977
878 [47018]: https://github.com/rust-lang/rust/pull/47018
879 [47080]: https://github.com/rust-lang/rust/pull/47080
880 [47084]: https://github.com/rust-lang/rust/pull/47084
881 [cargo/4743]: https://github.com/rust-lang/cargo/pull/4743
882 [cargo/4788]: https://github.com/rust-lang/cargo/pull/4788
883 [cargo/4817]: https://github.com/rust-lang/cargo/pull/4817
884 [`RefCell::replace`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.replace
885 [`RefCell::swap`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.swap
886 [`atomic::spin_loop_hint`]: https://doc.rust-lang.org/std/sync/atomic/fn.spin_loop_hint.html
889 Version 1.23.0 (2018-01-04)
890 ==========================
894 - [Arbitrary `auto` traits are now permitted in trait objects.][45772]
895 - [rustc now uses subtyping on the left hand side of binary operations.][45435]
896 Which should fix some confusing errors in some operations.
900 - [Enabled `TrapUnreachable` in LLVM which should mitigate the impact of
901 undefined behaviour.][45920]
902 - [rustc now suggests renaming import if names clash.][45660]
903 - [Display errors/warnings correctly when there are zero-width or
904 wide characters.][45711]
905 - [rustc now avoids unnecessary copies of arguments that are
906 simple bindings][45380] This should improve memory usage on average by 5-10%.
907 - [Updated musl used to build musl rustc to 1.1.17][45393]
911 - [Allow a trailing comma in `assert_eq/ne` macro][45887]
912 - [Implement Hash for raw pointers to unsized types][45483]
913 - [impl `From<*mut T>` for `AtomicPtr<T>`][45610]
914 - [impl `From<usize/isize>` for `AtomicUsize/AtomicIsize`.][45610]
915 - [Removed the `T: Sync` requirement for `RwLock<T>: Send`][45267]
916 - [Removed `T: Sized` requirement for `{<*const T>, <*mut T>}::as_ref`
917 and `<*mut T>::as_mut`][44932]
918 - [Optimized `Thread::{park, unpark}` implementation][45524]
919 - [Improved `SliceExt::binary_search` performance.][45333]
920 - [impl `FromIterator<()>` for `()`][45379]
921 - [Copied `AsciiExt` trait methods to primitive types.][44042] Use of `AsciiExt`
929 - [Cargo now supports uninstallation of multiple packages][cargo/4561]
930 eg. `cargo uninstall foo bar` uninstalls `foo` and `bar`.
931 - [Added unit test checking to `cargo check`][cargo/4592]
932 - [Cargo now lets you install a specific version
933 using `cargo install --version`][cargo/4637]
937 - [Releases now ship with the Cargo book documentation.][45692]
938 - [rustdoc now prints rendering warnings on every run.][45324]
942 - [Changes have been made to type equality to make it more correct,
943 in rare cases this could break some code.][45853] [Tracking issue for
944 further information][45852]
945 - [`char::escape_debug` now uses Unicode 10 over 9.][45571]
946 - [Upgraded Android SDK to 27, and NDK to r15c.][45580] This drops support for
947 Android 9, the minimum supported version is Android 14.
948 - [Bumped the minimum LLVM to 3.9][45326]
950 [44042]: https://github.com/rust-lang/rust/pull/44042
951 [44932]: https://github.com/rust-lang/rust/pull/44932
952 [45267]: https://github.com/rust-lang/rust/pull/45267
953 [45324]: https://github.com/rust-lang/rust/pull/45324
954 [45326]: https://github.com/rust-lang/rust/pull/45326
955 [45333]: https://github.com/rust-lang/rust/pull/45333
956 [45379]: https://github.com/rust-lang/rust/pull/45379
957 [45380]: https://github.com/rust-lang/rust/pull/45380
958 [45393]: https://github.com/rust-lang/rust/pull/45393
959 [45435]: https://github.com/rust-lang/rust/pull/45435
960 [45483]: https://github.com/rust-lang/rust/pull/45483
961 [45524]: https://github.com/rust-lang/rust/pull/45524
962 [45571]: https://github.com/rust-lang/rust/pull/45571
963 [45580]: https://github.com/rust-lang/rust/pull/45580
964 [45610]: https://github.com/rust-lang/rust/pull/45610
965 [45660]: https://github.com/rust-lang/rust/pull/45660
966 [45692]: https://github.com/rust-lang/rust/pull/45692
967 [45711]: https://github.com/rust-lang/rust/pull/45711
968 [45772]: https://github.com/rust-lang/rust/pull/45772
969 [45852]: https://github.com/rust-lang/rust/issues/45852
970 [45853]: https://github.com/rust-lang/rust/pull/45853
971 [45887]: https://github.com/rust-lang/rust/pull/45887
972 [45920]: https://github.com/rust-lang/rust/pull/45920
973 [cargo/4561]: https://github.com/rust-lang/cargo/pull/4561
974 [cargo/4592]: https://github.com/rust-lang/cargo/pull/4592
975 [cargo/4637]: https://github.com/rust-lang/cargo/pull/4637
978 Version 1.22.1 (2017-11-22)
979 ==========================
981 - [Update Cargo to fix an issue with macOS 10.13 "High Sierra"][46183]
983 [46183]: https://github.com/rust-lang/rust/pull/46183
985 Version 1.22.0 (2017-11-22)
986 ==========================
990 - [`non_snake_case` lint now allows extern no-mangle functions][44966]
991 - [Now accepts underscores in unicode escapes][43716]
992 - [`T op= &T` now works for numeric types.][44287] eg. `let mut x = 2; x += &8;`
993 - [types that impl `Drop` are now allowed in `const` and `static` types][44456]
997 - [rustc now defaults to having 16 codegen units at debug on supported platforms.][45064]
998 - [rustc will no longer inline in codegen units when compiling for debug][45075]
999 This should decrease compile times for debug builds.
1000 - [strict memory alignment now enabled on ARMv6][45094]
1001 - [Remove support for the PNaCl target `le32-unknown-nacl`][45041]
1005 - [Allow atomic operations up to 32 bits
1006 on `armv5te_unknown_linux_gnueabi`][44978]
1007 - [`Box<Error>` now impls `From<Cow<str>>`][44466]
1008 - [`std::mem::Discriminant` is now guaranteed to be `Send + Sync`][45095]
1009 - [`fs::copy` now returns the length of the main stream on NTFS.][44895]
1010 - [Properly detect overflow in `Instant += Duration`.][44220]
1011 - [impl `Hasher` for `{&mut Hasher, Box<Hasher>}`][44015]
1012 - [impl `fmt::Debug` for `SplitWhitespace`.][44303]
1013 - [`Option<T>` now impls `Try`][42526] This allows for using `?` with `Option` types.
1020 - [Cargo will now build multi file examples in subdirectories of the `examples`
1021 folder that have a `main.rs` file.][cargo/4496]
1022 - [Changed `[root]` to `[package]` in `Cargo.lock`][cargo/4571] Packages with
1023 the old format will continue to work and can be updated with `cargo update`.
1024 - [Now supports vendoring git repositories][cargo/3992]
1028 - [`libbacktrace` is now available on Apple platforms.][44251]
1029 - [Stabilised the `compile_fail` attribute for code fences in doc-comments.][43949]
1030 This now lets you specify that a given code example will fail to compile.
1034 - [The minimum Android version that rustc can build for has been bumped
1035 to `4.0` from `2.3`][45656]
1036 - [Allowing `T op= &T` for numeric types has broken some type
1037 inference cases][45480]
1040 [42526]: https://github.com/rust-lang/rust/pull/42526
1041 [43017]: https://github.com/rust-lang/rust/pull/43017
1042 [43716]: https://github.com/rust-lang/rust/pull/43716
1043 [43949]: https://github.com/rust-lang/rust/pull/43949
1044 [44015]: https://github.com/rust-lang/rust/pull/44015
1045 [44220]: https://github.com/rust-lang/rust/pull/44220
1046 [44251]: https://github.com/rust-lang/rust/pull/44251
1047 [44287]: https://github.com/rust-lang/rust/pull/44287
1048 [44303]: https://github.com/rust-lang/rust/pull/44303
1049 [44456]: https://github.com/rust-lang/rust/pull/44456
1050 [44466]: https://github.com/rust-lang/rust/pull/44466
1051 [44895]: https://github.com/rust-lang/rust/pull/44895
1052 [44966]: https://github.com/rust-lang/rust/pull/44966
1053 [44978]: https://github.com/rust-lang/rust/pull/44978
1054 [45041]: https://github.com/rust-lang/rust/pull/45041
1055 [45064]: https://github.com/rust-lang/rust/pull/45064
1056 [45075]: https://github.com/rust-lang/rust/pull/45075
1057 [45094]: https://github.com/rust-lang/rust/pull/45094
1058 [45095]: https://github.com/rust-lang/rust/pull/45095
1059 [45480]: https://github.com/rust-lang/rust/issues/45480
1060 [45656]: https://github.com/rust-lang/rust/pull/45656
1061 [cargo/3992]: https://github.com/rust-lang/cargo/pull/3992
1062 [cargo/4496]: https://github.com/rust-lang/cargo/pull/4496
1063 [cargo/4571]: https://github.com/rust-lang/cargo/pull/4571
1070 Version 1.21.0 (2017-10-12)
1071 ==========================
1075 - [You can now use static references for literals.][43838]
1079 let x: &'static u32 = &0;
1082 - [Relaxed path syntax. Optional `::` before `<` is now allowed in all contexts.][43540]
1085 my_macro!(Vec<i32>::new); // Always worked
1086 my_macro!(Vec::<i32>::new); // Now works
1091 - [Upgraded jemalloc to 4.5.0][43911]
1092 - [Enabled unwinding panics on Redox][43917]
1093 - [Now runs LLVM in parallel during translation phase.][43506]
1094 This should reduce peak memory usage.
1098 - [Generate builtin impls for `Clone` for all arrays and tuples that
1099 are `T: Clone`][43690]
1100 - [`Stdin`, `Stdout`, and `Stderr` now implement `AsRawFd`.][43459]
1101 - [`Rc` and `Arc` now implement `From<&[T]> where T: Clone`, `From<str>`,
1102 `From<String>`, `From<Box<T>> where T: ?Sized`, and `From<Vec<T>>`.][42565]
1107 [`std::mem::discriminant`]
1111 - [You can now call `cargo install` with multiple package names][cargo/4216]
1112 - [Cargo commands inside a virtual workspace will now implicitly
1113 pass `--all`][cargo/4335]
1114 - [Added a `[patch]` section to `Cargo.toml` to handle
1115 prepublication dependencies][cargo/4123] [RFC 1969]
1116 - [`include` & `exclude` fields in `Cargo.toml` now accept gitignore
1117 like patterns][cargo/4270]
1118 - [Added the `--all-targets` option][cargo/4400]
1119 - [Using required dependencies as a feature is now deprecated and emits
1120 a warning][cargo/4364]
1125 - [Cargo docs are moving][43916]
1126 to [doc.rust-lang.org/cargo](https://doc.rust-lang.org/cargo)
1127 - [The rustdoc book is now available][43863]
1128 at [doc.rust-lang.org/rustdoc](https://doc.rust-lang.org/rustdoc)
1129 - [Added a preview of RLS has been made available through rustup][44204]
1130 Install with `rustup component add rls-preview`
1131 - [`std::os` documentation for Unix, Linux, and Windows now appears on doc.rust-lang.org][43348]
1132 Previously only showed `std::os::unix`.
1136 - [Changes in method matching against higher-ranked types][43880] This may cause
1137 breakage in subtyping corner cases. [A more in-depth explanation is available.][info/43880]
1138 - [rustc's JSON error output's byte position start at top of file.][42973]
1139 Was previously relative to the rustc's internal `CodeMap` struct which
1140 required the unstable library `libsyntax` to correctly use.
1141 - [`unused_results` lint no longer ignores booleans][43728]
1143 [42565]: https://github.com/rust-lang/rust/pull/42565
1144 [42973]: https://github.com/rust-lang/rust/pull/42973
1145 [43348]: https://github.com/rust-lang/rust/pull/43348
1146 [43459]: https://github.com/rust-lang/rust/pull/43459
1147 [43506]: https://github.com/rust-lang/rust/pull/43506
1148 [43540]: https://github.com/rust-lang/rust/pull/43540
1149 [43690]: https://github.com/rust-lang/rust/pull/43690
1150 [43728]: https://github.com/rust-lang/rust/pull/43728
1151 [43838]: https://github.com/rust-lang/rust/pull/43838
1152 [43863]: https://github.com/rust-lang/rust/pull/43863
1153 [43880]: https://github.com/rust-lang/rust/pull/43880
1154 [43911]: https://github.com/rust-lang/rust/pull/43911
1155 [43916]: https://github.com/rust-lang/rust/pull/43916
1156 [43917]: https://github.com/rust-lang/rust/pull/43917
1157 [44204]: https://github.com/rust-lang/rust/pull/44204
1158 [cargo/4123]: https://github.com/rust-lang/cargo/pull/4123
1159 [cargo/4216]: https://github.com/rust-lang/cargo/pull/4216
1160 [cargo/4270]: https://github.com/rust-lang/cargo/pull/4270
1161 [cargo/4335]: https://github.com/rust-lang/cargo/pull/4335
1162 [cargo/4364]: https://github.com/rust-lang/cargo/pull/4364
1163 [cargo/4400]: https://github.com/rust-lang/cargo/pull/4400
1164 [RFC 1969]: https://github.com/rust-lang/rfcs/pull/1969
1165 [info/43880]: https://github.com/rust-lang/rust/issues/44224#issuecomment-330058902
1166 [`std::mem::discriminant`]: https://doc.rust-lang.org/std/mem/fn.discriminant.html
1168 Version 1.20.0 (2017-08-31)
1169 ===========================
1173 - [Associated constants are now stabilised.][42809]
1174 - [A lot of macro bugs are now fixed.][42913]
1179 - [Struct fields are now properly coerced to the expected field type.][42807]
1180 - [Enabled wasm LLVM backend][42571] WASM can now be built with the
1181 `wasm32-experimental-emscripten` target.
1182 - [Changed some of the error messages to be more helpful.][42033]
1183 - [Add support for RELRO(RELocation Read-Only) for platforms that support
1185 - [rustc now reports the total number of errors on compilation failure][43015]
1186 previously this was only the number of errors in the pass that failed.
1187 - [Expansion in rustc has been sped up 29x.][42533]
1188 - [added `msp430-none-elf` target.][43099]
1189 - [rustc will now suggest one-argument enum variant to fix type mismatch when
1191 - [Fixes backtraces on Redox][43228]
1192 - [rustc now identifies different versions of same crate when absolute paths of
1193 different types match in an error message.][42826]
1199 - [Relaxed Debug constraints on `{HashMap,BTreeMap}::{Keys,Values}`.][42854]
1200 - [Impl `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Debug`, `Hash` for unsized
1202 - [Impl `fmt::{Display, Debug}` for `Ref`, `RefMut`, `MutexGuard`,
1203 `RwLockReadGuard`, `RwLockWriteGuard`][42822]
1204 - [Impl `Clone` for `DefaultHasher`.][42799]
1205 - [Impl `Sync` for `SyncSender`.][42397]
1206 - [Impl `FromStr` for `char`][42271]
1207 - [Fixed how `{f32, f64}::{is_sign_negative, is_sign_positive}` handles
1209 - [allow messages in the `unimplemented!()` macro.][42155]
1210 ie. `unimplemented!("Waiting for 1.21 to be stable")`
1211 - [`pub(restricted)` is now supported in the `thread_local!` macro.][43185]
1212 - [Upgrade to Unicode 10.0.0][42999]
1213 - [Reimplemented `{f32, f64}::{min, max}` in Rust instead of using CMath.][42430]
1214 - [Skip the main thread's manual stack guard on Linux][43072]
1215 - [Iterator::nth for `ops::{Range, RangeFrom}` is now done in O(1) time][43077]
1216 - [`#[repr(align(N))]` attribute max number is now 2^31 - 1.][43097] This was
1218 - [`{OsStr, Path}::Display` now avoids allocations where possible][42613]
1223 - [`CStr::into_c_string`]
1224 - [`CString::as_c_str`]
1225 - [`CString::into_boxed_c_str`]
1226 - [`Chain::get_mut`]
1227 - [`Chain::get_ref`]
1228 - [`Chain::into_inner`]
1229 - [`Option::get_or_insert_with`]
1230 - [`Option::get_or_insert`]
1231 - [`OsStr::into_os_string`]
1232 - [`OsString::into_boxed_os_str`]
1235 - [`Utf8Error::error_len`]
1236 - [`char::EscapeDebug`]
1237 - [`char::escape_debug`]
1238 - [`compile_error!`]
1239 - [`f32::from_bits`]
1241 - [`f64::from_bits`]
1243 - [`mem::ManuallyDrop`]
1244 - [`slice::sort_unstable_by_key`]
1245 - [`slice::sort_unstable_by`]
1246 - [`slice::sort_unstable`]
1247 - [`str::from_boxed_utf8_unchecked`]
1248 - [`str::as_bytes_mut`]
1249 - [`str::as_bytes_mut`]
1250 - [`str::from_utf8_mut`]
1251 - [`str::from_utf8_unchecked_mut`]
1253 - [`str::get_unchecked_mut`]
1254 - [`str::get_unchecked`]
1256 - [`str::into_boxed_bytes`]
1261 - [Cargo API token location moved from `~/.cargo/config` to
1262 `~/.cargo/credentials`.][cargo/3978]
1263 - [Cargo will now build `main.rs` binaries that are in sub-directories of
1264 `src/bin`.][cargo/4214] ie. Having `src/bin/server/main.rs` and
1265 `src/bin/client/main.rs` generates `target/debug/server` and `target/debug/client`
1266 - [You can now specify version of a binary when installed through
1267 `cargo install` using `--vers`.][cargo/4229]
1268 - [Added `--no-fail-fast` flag to cargo to run all benchmarks regardless of
1269 failure.][cargo/4248]
1270 - [Changed the convention around which file is the crate root.][cargo/4259]
1271 - [The `include`/`exclude` property in `Cargo.toml` now accepts gitignore paths
1272 instead of glob patterns][cargo/4270]. Glob patterns are now deprecated.
1277 - [Functions with `'static` in their return types will now not be as usable as
1278 if they were using lifetime parameters instead.][42417]
1279 - [The reimplementation of `{f32, f64}::is_sign_{negative, positive}` now
1280 takes the sign of NaN into account where previously didn't.][42430]
1282 [42033]: https://github.com/rust-lang/rust/pull/42033
1283 [42155]: https://github.com/rust-lang/rust/pull/42155
1284 [42271]: https://github.com/rust-lang/rust/pull/42271
1285 [42397]: https://github.com/rust-lang/rust/pull/42397
1286 [42417]: https://github.com/rust-lang/rust/pull/42417
1287 [42430]: https://github.com/rust-lang/rust/pull/42430
1288 [42431]: https://github.com/rust-lang/rust/pull/42431
1289 [42533]: https://github.com/rust-lang/rust/pull/42533
1290 [42571]: https://github.com/rust-lang/rust/pull/42571
1291 [42613]: https://github.com/rust-lang/rust/pull/42613
1292 [42799]: https://github.com/rust-lang/rust/pull/42799
1293 [42807]: https://github.com/rust-lang/rust/pull/42807
1294 [42809]: https://github.com/rust-lang/rust/pull/42809
1295 [42822]: https://github.com/rust-lang/rust/pull/42822
1296 [42826]: https://github.com/rust-lang/rust/pull/42826
1297 [42854]: https://github.com/rust-lang/rust/pull/42854
1298 [42913]: https://github.com/rust-lang/rust/pull/42913
1299 [42999]: https://github.com/rust-lang/rust/pull/42999
1300 [43011]: https://github.com/rust-lang/rust/pull/43011
1301 [43015]: https://github.com/rust-lang/rust/pull/43015
1302 [43072]: https://github.com/rust-lang/rust/pull/43072
1303 [43077]: https://github.com/rust-lang/rust/pull/43077
1304 [43097]: https://github.com/rust-lang/rust/pull/43097
1305 [43099]: https://github.com/rust-lang/rust/pull/43099
1306 [43170]: https://github.com/rust-lang/rust/pull/43170
1307 [43178]: https://github.com/rust-lang/rust/pull/43178
1308 [43185]: https://github.com/rust-lang/rust/pull/43185
1309 [43228]: https://github.com/rust-lang/rust/pull/43228
1310 [cargo/3978]: https://github.com/rust-lang/cargo/pull/3978
1311 [cargo/4214]: https://github.com/rust-lang/cargo/pull/4214
1312 [cargo/4229]: https://github.com/rust-lang/cargo/pull/4229
1313 [cargo/4248]: https://github.com/rust-lang/cargo/pull/4248
1314 [cargo/4259]: https://github.com/rust-lang/cargo/pull/4259
1315 [cargo/4270]: https://github.com/rust-lang/cargo/pull/4270
1316 [`CStr::into_c_string`]: https://doc.rust-lang.org/std/ffi/struct.CStr.html#method.into_c_string
1317 [`CString::as_c_str`]: https://doc.rust-lang.org/std/ffi/struct.CString.html#method.as_c_str
1318 [`CString::into_boxed_c_str`]: https://doc.rust-lang.org/std/ffi/struct.CString.html#method.into_boxed_c_str
1319 [`Chain::get_mut`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.get_mut
1320 [`Chain::get_ref`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.get_ref
1321 [`Chain::into_inner`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.into_inner
1322 [`Option::get_or_insert_with`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.get_or_insert_with
1323 [`Option::get_or_insert`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.get_or_insert
1324 [`OsStr::into_os_string`]: https://doc.rust-lang.org/std/ffi/struct.OsStr.html#method.into_os_string
1325 [`OsString::into_boxed_os_str`]: https://doc.rust-lang.org/std/ffi/struct.OsString.html#method.into_boxed_os_str
1326 [`Take::get_mut`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.get_mut
1327 [`Take::get_ref`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.get_ref
1328 [`Utf8Error::error_len`]: https://doc.rust-lang.org/std/str/struct.Utf8Error.html#method.error_len
1329 [`char::EscapeDebug`]: https://doc.rust-lang.org/std/char/struct.EscapeDebug.html
1330 [`char::escape_debug`]: https://doc.rust-lang.org/std/primitive.char.html#method.escape_debug
1331 [`compile_error!`]: https://doc.rust-lang.org/std/macro.compile_error.html
1332 [`f32::from_bits`]: https://doc.rust-lang.org/std/primitive.f32.html#method.from_bits
1333 [`f32::to_bits`]: https://doc.rust-lang.org/std/primitive.f32.html#method.to_bits
1334 [`f64::from_bits`]: https://doc.rust-lang.org/std/primitive.f64.html#method.from_bits
1335 [`f64::to_bits`]: https://doc.rust-lang.org/std/primitive.f64.html#method.to_bits
1336 [`mem::ManuallyDrop`]: https://doc.rust-lang.org/std/mem/union.ManuallyDrop.html
1337 [`slice::sort_unstable_by_key`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable_by_key
1338 [`slice::sort_unstable_by`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable_by
1339 [`slice::sort_unstable`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable
1340 [`str::from_boxed_utf8_unchecked`]: https://doc.rust-lang.org/std/str/fn.from_boxed_utf8_unchecked.html
1341 [`str::as_bytes_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.as_bytes_mut
1342 [`str::from_utf8_mut`]: https://doc.rust-lang.org/std/str/fn.from_utf8_mut.html
1343 [`str::from_utf8_unchecked_mut`]: https://doc.rust-lang.org/std/str/fn.from_utf8_unchecked_mut.html
1344 [`str::get_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_mut
1345 [`str::get_unchecked_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_unchecked_mut
1346 [`str::get_unchecked`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_unchecked
1347 [`str::get`]: https://doc.rust-lang.org/std/primitive.str.html#method.get
1348 [`str::into_boxed_bytes`]: https://doc.rust-lang.org/std/primitive.str.html#method.into_boxed_bytes
1351 Version 1.19.0 (2017-07-20)
1352 ===========================
1357 - [Numeric fields can now be used for creating tuple structs.][41145] [RFC 1506]
1358 For example `struct Point(u32, u32); let x = Point { 0: 7, 1: 0 };`.
1359 - [Macro recursion limit increased to 1024 from 64.][41676]
1360 - [Added lint for detecting unused macros.][41907]
1361 - [`loop` can now return a value with `break`.][42016] [RFC 1624]
1362 For example: `let x = loop { break 7; };`
1363 - [C compatible `union`s are now available.][42068] [RFC 1444] They can only
1364 contain `Copy` types and cannot have a `Drop` implementation.
1365 Example: `union Foo { bar: u8, baz: usize }`
1366 - [Non capturing closures can now be coerced into `fn`s,][42162] [RFC 1558]
1367 Example: `let foo: fn(u8) -> u8 = |v: u8| { v };`
1372 - [Add support for bootstrapping the Rust compiler toolchain on Android.][41370]
1373 - [Change `arm-linux-androideabi` to correspond to the `armeabi`
1374 official ABI.][41656] If you wish to continue targeting the `armeabi-v7a` ABI
1375 you should use `--target armv7-linux-androideabi`.
1376 - [Fixed ICE when removing a source file between compilation sessions.][41873]
1377 - [Minor optimisation of string operations.][42037]
1378 - [Compiler error message is now `aborting due to previous error(s)` instead of
1379 `aborting due to N previous errors`][42150] This was previously inaccurate and
1380 would only count certain kinds of errors.
1381 - [The compiler now supports Visual Studio 2017][42225]
1382 - [The compiler is now built against LLVM 4.0.1 by default][42948]
1383 - [Added a lot][42264] of [new error codes][42302]
1384 - [Added `target-feature=+crt-static` option][37406] [RFC 1721] Which allows
1385 libraries with C Run-time Libraries(CRT) to be statically linked.
1386 - [Fixed various ARM codegen bugs][42740]
1391 - [`String` now implements `FromIterator<Cow<'a, str>>` and
1392 `Extend<Cow<'a, str>>`][41449]
1393 - [`Vec` now implements `From<&mut [T]>`][41530]
1394 - [`Box<[u8]>` now implements `From<Box<str>>`][41258]
1395 - [`SplitWhitespace` now implements `Clone`][41659]
1396 - [`[u8]::reverse` is now 5x faster and `[u16]::reverse` is now
1398 - [`eprint!` and `eprintln!` macros added to prelude.][41192] Same as the `print!`
1399 macros, but for printing to stderr.
1404 - [`OsString::shrink_to_fit`]
1407 - [`thread::ThreadId`]
1412 - [Build scripts can now add environment variables to the environment
1413 the crate is being compiled in.
1414 Example: `println!("cargo:rustc-env=FOO=bar");`][cargo/3929]
1415 - [Subcommands now replace the current process rather than spawning a new
1416 child process][cargo/3970]
1417 - [Workspace members can now accept glob file patterns][cargo/3979]
1418 - [Added `--all` flag to the `cargo bench` subcommand to run benchmarks of all
1419 the members in a given workspace.][cargo/3988]
1420 - [Updated `libssh2-sys` to 0.2.6][cargo/4008]
1421 - [Target directory path is now in the cargo metadata][cargo/4022]
1422 - [Cargo no longer checks out a local working directory for the
1423 crates.io index][cargo/4026] This should provide smaller file size for the
1424 registry, and improve cloning times, especially on Windows machines.
1425 - [Added an `--exclude` option for excluding certain packages when using the
1426 `--all` option][cargo/4031]
1427 - [Cargo will now automatically retry when receiving a 5xx error
1428 from crates.io][cargo/4032]
1429 - [The `--features` option now accepts multiple comma or space
1430 delimited values.][cargo/4084]
1431 - [Added support for custom target specific runners][cargo/3954]
1436 - [Added `rust-windbg.cmd`][39983] for loading rust `.natvis` files in the
1438 - [Rust will now release XZ compressed packages][rust-installer/57]
1439 - [rustup will now prefer to download rust packages with
1440 XZ compression][rustup/1100] over GZip packages.
1441 - [Added the ability to escape `#` in rust documentation][41785] By adding
1442 additional `#`'s ie. `##` is now `#`
1447 - [`MutexGuard<T>` may only be `Sync` if `T` is `Sync`.][41624]
1448 - [`-Z` flags are now no longer allowed to be used on the stable
1449 compiler.][41751] This has been a warning for a year previous to this.
1450 - [As a result of the `-Z` flag change, the `cargo-check` plugin no
1451 longer works][42844]. Users should migrate to the built-in `check`
1452 command, which has been available since 1.16.
1453 - [Ending a float literal with `._` is now a hard error.
1454 Example: `42._` .][41946]
1455 - [Any use of a private `extern crate` outside of its module is now a
1456 hard error.][36886] This was previously a warning.
1457 - [`use ::self::foo;` is now a hard error.][36888] `self` paths are always
1458 relative while the `::` prefix makes a path absolute, but was ignored and the
1459 path was relative regardless.
1460 - [Floating point constants in match patterns is now a hard error][36890]
1461 This was previously a warning.
1462 - [Struct or enum constants that don't derive `PartialEq` & `Eq` used
1463 match patterns is now a hard error][36891] This was previously a warning.
1464 - [Lifetimes named `'_` are no longer allowed.][36892] This was previously
1466 - [From the pound escape, lines consisting of multiple `#`s are
1468 - [It is an error to re-export private enum variants][42460]. This is
1469 known to break a number of crates that depend on an older version of
1471 - [On Windows, if `VCINSTALLDIR` is set incorrectly, `rustc` will try
1472 to use it to find the linker, and the build will fail where it did
1473 not previously][42607]
1475 [36886]: https://github.com/rust-lang/rust/issues/36886
1476 [36888]: https://github.com/rust-lang/rust/issues/36888
1477 [36890]: https://github.com/rust-lang/rust/issues/36890
1478 [36891]: https://github.com/rust-lang/rust/issues/36891
1479 [36892]: https://github.com/rust-lang/rust/issues/36892
1480 [37406]: https://github.com/rust-lang/rust/issues/37406
1481 [39983]: https://github.com/rust-lang/rust/pull/39983
1482 [41145]: https://github.com/rust-lang/rust/pull/41145
1483 [41192]: https://github.com/rust-lang/rust/pull/41192
1484 [41258]: https://github.com/rust-lang/rust/pull/41258
1485 [41370]: https://github.com/rust-lang/rust/pull/41370
1486 [41449]: https://github.com/rust-lang/rust/pull/41449
1487 [41530]: https://github.com/rust-lang/rust/pull/41530
1488 [41624]: https://github.com/rust-lang/rust/pull/41624
1489 [41656]: https://github.com/rust-lang/rust/pull/41656
1490 [41659]: https://github.com/rust-lang/rust/pull/41659
1491 [41676]: https://github.com/rust-lang/rust/pull/41676
1492 [41751]: https://github.com/rust-lang/rust/pull/41751
1493 [41764]: https://github.com/rust-lang/rust/pull/41764
1494 [41785]: https://github.com/rust-lang/rust/pull/41785
1495 [41873]: https://github.com/rust-lang/rust/pull/41873
1496 [41907]: https://github.com/rust-lang/rust/pull/41907
1497 [41946]: https://github.com/rust-lang/rust/pull/41946
1498 [42016]: https://github.com/rust-lang/rust/pull/42016
1499 [42037]: https://github.com/rust-lang/rust/pull/42037
1500 [42068]: https://github.com/rust-lang/rust/pull/42068
1501 [42150]: https://github.com/rust-lang/rust/pull/42150
1502 [42162]: https://github.com/rust-lang/rust/pull/42162
1503 [42225]: https://github.com/rust-lang/rust/pull/42225
1504 [42264]: https://github.com/rust-lang/rust/pull/42264
1505 [42302]: https://github.com/rust-lang/rust/pull/42302
1506 [42460]: https://github.com/rust-lang/rust/issues/42460
1507 [42607]: https://github.com/rust-lang/rust/issues/42607
1508 [42740]: https://github.com/rust-lang/rust/pull/42740
1509 [42844]: https://github.com/rust-lang/rust/issues/42844
1510 [42948]: https://github.com/rust-lang/rust/pull/42948
1511 [RFC 1444]: https://github.com/rust-lang/rfcs/pull/1444
1512 [RFC 1506]: https://github.com/rust-lang/rfcs/pull/1506
1513 [RFC 1558]: https://github.com/rust-lang/rfcs/pull/1558
1514 [RFC 1624]: https://github.com/rust-lang/rfcs/pull/1624
1515 [RFC 1721]: https://github.com/rust-lang/rfcs/pull/1721
1516 [`Command::envs`]: https://doc.rust-lang.org/std/process/struct.Command.html#method.envs
1517 [`OsString::shrink_to_fit`]: https://doc.rust-lang.org/std/ffi/struct.OsString.html#method.shrink_to_fit
1518 [`cmp::Reverse`]: https://doc.rust-lang.org/std/cmp/struct.Reverse.html
1519 [`thread::ThreadId`]: https://doc.rust-lang.org/std/thread/struct.ThreadId.html
1520 [cargo/3929]: https://github.com/rust-lang/cargo/pull/3929
1521 [cargo/3954]: https://github.com/rust-lang/cargo/pull/3954
1522 [cargo/3970]: https://github.com/rust-lang/cargo/pull/3970
1523 [cargo/3979]: https://github.com/rust-lang/cargo/pull/3979
1524 [cargo/3988]: https://github.com/rust-lang/cargo/pull/3988
1525 [cargo/4008]: https://github.com/rust-lang/cargo/pull/4008
1526 [cargo/4022]: https://github.com/rust-lang/cargo/pull/4022
1527 [cargo/4026]: https://github.com/rust-lang/cargo/pull/4026
1528 [cargo/4031]: https://github.com/rust-lang/cargo/pull/4031
1529 [cargo/4032]: https://github.com/rust-lang/cargo/pull/4032
1530 [cargo/4084]: https://github.com/rust-lang/cargo/pull/4084
1531 [rust-installer/57]: https://github.com/rust-lang/rust-installer/pull/57
1532 [rustup/1100]: https://github.com/rust-lang-nursery/rustup.rs/pull/1100
1535 Version 1.18.0 (2017-06-08)
1536 ===========================
1541 - [Stabilize pub(restricted)][40556] `pub` can now accept a module path to
1542 make the item visible to just that module tree. Also accepts the keyword
1543 `crate` to make something public to the whole crate but not users of the
1544 library. Example: `pub(crate) mod utils;`. [RFC 1422].
1545 - [Stabilize `#![windows_subsystem]` attribute][40870] conservative exposure of the
1546 `/SUBSYSTEM` linker flag on Windows platforms. [RFC 1665].
1547 - [Refactor of trait object type parsing][40043] Now `ty` in macros can accept
1548 types like `Write + Send`, trailing `+` are now supported in trait objects,
1549 and better error reporting for trait objects starting with `?Sized`.
1550 - [0e+10 is now a valid floating point literal][40589]
1551 - [Now warns if you bind a lifetime parameter to 'static][40734]
1552 - [Tuples, Enum variant fields, and structs with no `repr` attribute or with
1553 `#[repr(Rust)]` are reordered to minimize padding and produce a smaller
1554 representation in some cases.][40377]
1559 - [rustc can now emit mir with `--emit mir`][39891]
1560 - [Improved LLVM IR for trivial functions][40367]
1561 - [Added explanation for E0090(Wrong number of lifetimes are supplied)][40723]
1562 - [rustc compilation is now 15%-20% faster][41469] Thanks to optimisation
1563 opportunities found through profiling
1564 - [Improved backtrace formatting when panicking][38165]
1569 - [Specialized `Vec::from_iter` being passed `vec::IntoIter`][40731] if the
1570 iterator hasn't been advanced the original `Vec` is reassembled with no actual
1571 iteration or reallocation.
1572 - [Simplified HashMap Bucket interface][40561] provides performance
1573 improvements for iterating and cloning.
1574 - [Specialize Vec::from_elem to use calloc][40409]
1575 - [Fixed Race condition in fs::create_dir_all][39799]
1576 - [No longer caching stdio on Windows][40516]
1577 - [Optimized insertion sort in slice][40807] insertion sort in some cases
1578 2.50%~ faster and in one case now 12.50% faster.
1579 - [Optimized `AtomicBool::fetch_nand`][41143]
1584 - [`Child::try_wait`]
1585 - [`HashMap::retain`]
1586 - [`HashSet::retain`]
1588 - [`TcpStream::peek`]
1589 - [`UdpSocket::peek`]
1590 - [`UdpSocket::peek_from`]
1595 - [Added partial Pijul support][cargo/3842] Pijul is a version control system in Rust.
1596 You can now create new cargo projects with Pijul using `cargo new --vcs pijul`
1597 - [Now always emits build script warnings for crates that fail to build][cargo/3847]
1598 - [Added Android build support][cargo/3885]
1599 - [Added `--bins` and `--tests` flags][cargo/3901] now you can build all programs
1600 of a certain type, for example `cargo build --bins` will build all
1602 - [Added support for haiku][cargo/3952]
1607 - [rustdoc can now use pulldown-cmark with the `--enable-commonmark` flag][40338]
1608 - [Added rust-windbg script for better debugging on Windows][39983]
1609 - [Rust now uses the official cross compiler for NetBSD][40612]
1610 - [rustdoc now accepts `#` at the start of files][40828]
1611 - [Fixed jemalloc support for musl][41168]
1616 - [Changes to how the `0` flag works in format!][40241] Padding zeroes are now
1617 always placed after the sign if it exists and before the digits. With the `#`
1618 flag the zeroes are placed after the prefix and before the digits.
1619 - [Due to the struct field optimisation][40377], using `transmute` on structs
1620 that have no `repr` attribute or `#[repr(Rust)]` will no longer work. This has
1621 always been undefined behavior, but is now more likely to break in practice.
1622 - [The refactor of trait object type parsing][40043] fixed a bug where `+` was
1623 receiving the wrong priority parsing things like `&for<'a> Tr<'a> + Send` as
1624 `&(for<'a> Tr<'a> + Send)` instead of `(&for<'a> Tr<'a>) + Send`
1625 - [Overlapping inherent `impl`s are now a hard error][40728]
1626 - [`PartialOrd` and `Ord` must agree on the ordering.][41270]
1627 - [`rustc main.rs -o out --emit=asm,llvm-ir`][41085] Now will output
1628 `out.asm` and `out.ll` instead of only one of the filetypes.
1629 - [ calling a function that returns `Self` will no longer work][41805] when
1630 the size of `Self` cannot be statically determined.
1631 - [rustc now builds with a "pthreads" flavour of MinGW for Windows GNU][40805]
1632 this has caused a few regressions namely:
1634 - Changed the link order of local static/dynamic libraries (respecting the
1635 order on given rather than having the compiler reorder).
1636 - Changed how MinGW is linked, native code linked to dynamic libraries
1637 may require manually linking to the gcc support library (for the native
1640 [38165]: https://github.com/rust-lang/rust/pull/38165
1641 [39799]: https://github.com/rust-lang/rust/pull/39799
1642 [39891]: https://github.com/rust-lang/rust/pull/39891
1643 [39983]: https://github.com/rust-lang/rust/pull/39983
1644 [40043]: https://github.com/rust-lang/rust/pull/40043
1645 [40241]: https://github.com/rust-lang/rust/pull/40241
1646 [40338]: https://github.com/rust-lang/rust/pull/40338
1647 [40367]: https://github.com/rust-lang/rust/pull/40367
1648 [40377]: https://github.com/rust-lang/rust/pull/40377
1649 [40409]: https://github.com/rust-lang/rust/pull/40409
1650 [40516]: https://github.com/rust-lang/rust/pull/40516
1651 [40556]: https://github.com/rust-lang/rust/pull/40556
1652 [40561]: https://github.com/rust-lang/rust/pull/40561
1653 [40589]: https://github.com/rust-lang/rust/pull/40589
1654 [40612]: https://github.com/rust-lang/rust/pull/40612
1655 [40723]: https://github.com/rust-lang/rust/pull/40723
1656 [40728]: https://github.com/rust-lang/rust/pull/40728
1657 [40731]: https://github.com/rust-lang/rust/pull/40731
1658 [40734]: https://github.com/rust-lang/rust/pull/40734
1659 [40805]: https://github.com/rust-lang/rust/pull/40805
1660 [40807]: https://github.com/rust-lang/rust/pull/40807
1661 [40828]: https://github.com/rust-lang/rust/pull/40828
1662 [40870]: https://github.com/rust-lang/rust/pull/40870
1663 [41085]: https://github.com/rust-lang/rust/pull/41085
1664 [41143]: https://github.com/rust-lang/rust/pull/41143
1665 [41168]: https://github.com/rust-lang/rust/pull/41168
1666 [41270]: https://github.com/rust-lang/rust/issues/41270
1667 [41469]: https://github.com/rust-lang/rust/pull/41469
1668 [41805]: https://github.com/rust-lang/rust/issues/41805
1669 [RFC 1422]: https://github.com/rust-lang/rfcs/blob/master/text/1422-pub-restricted.md
1670 [RFC 1665]: https://github.com/rust-lang/rfcs/blob/master/text/1665-windows-subsystem.md
1671 [`Child::try_wait`]: https://doc.rust-lang.org/std/process/struct.Child.html#method.try_wait
1672 [`HashMap::retain`]: https://doc.rust-lang.org/std/collections/struct.HashMap.html#method.retain
1673 [`HashSet::retain`]: https://doc.rust-lang.org/std/collections/struct.HashSet.html#method.retain
1674 [`PeekMut::pop`]: https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html#method.pop
1675 [`TcpStream::peek`]: https://doc.rust-lang.org/std/net/struct.TcpStream.html#method.peek
1676 [`UdpSocket::peek_from`]: https://doc.rust-lang.org/std/net/struct.UdpSocket.html#method.peek_from
1677 [`UdpSocket::peek`]: https://doc.rust-lang.org/std/net/struct.UdpSocket.html#method.peek
1678 [cargo/3842]: https://github.com/rust-lang/cargo/pull/3842
1679 [cargo/3847]: https://github.com/rust-lang/cargo/pull/3847
1680 [cargo/3885]: https://github.com/rust-lang/cargo/pull/3885
1681 [cargo/3901]: https://github.com/rust-lang/cargo/pull/3901
1682 [cargo/3952]: https://github.com/rust-lang/cargo/pull/3952
1685 Version 1.17.0 (2017-04-27)
1686 ===========================
1691 * [The lifetime of statics and consts defaults to `'static`][39265]. [RFC 1623]
1692 * [Fields of structs may be initialized without duplicating the field/variable
1693 names][39761]. [RFC 1682]
1694 * [`Self` may be included in the `where` clause of `impls`][38864]. [RFC 1647]
1695 * [When coercing to an unsized type lifetimes must be equal][40319]. That is,
1696 there is no subtyping between `T` and `U` when `T: Unsize<U>`. For example,
1697 coercing `&mut [&'a X; N]` to `&mut [&'b X]` requires `'a` be equal to
1698 `'b`. Soundness fix.
1699 * [Values passed to the indexing operator, `[]`, automatically coerce][40166]
1700 * [Static variables may contain references to other statics][40027]
1705 * [Exit quickly on only `--emit dep-info`][40336]
1706 * [Make `-C relocation-model` more correctly determine whether the linker
1707 creates a position-independent executable][40245]
1708 * [Add `-C overflow-checks` to directly control whether integer overflow
1710 * [The rustc type checker now checks items on demand instead of in a single
1711 in-order pass][40008]. This is mostly an internal refactoring in support of
1712 future work, including incremental type checking, but also resolves [RFC
1713 1647], allowing `Self` to appear in `impl` `where` clauses.
1714 * [Optimize vtable loads][39995]
1715 * [Turn off vectorization for Emscripten targets][39990]
1716 * [Provide suggestions for unknown macros imported with `use`][39953]
1717 * [Fix ICEs in path resolution][39939]
1718 * [Strip exception handling code on Emscripten when `panic=abort`][39193]
1719 * [Add clearer error message using `&str + &str`][39116]
1730 * [`Ordering::then`]
1731 * [`Ordering::then_with`]
1732 * [`BTreeMap::range`]
1733 * [`BTreeMap::range_mut`]
1734 * [`collections::Bound`]
1735 * [`process::abort`]
1736 * [`ptr::read_unaligned`]
1737 * [`ptr::write_unaligned`]
1738 * [`Result::expect_err`]
1741 * [`Cell::into_inner`]
1747 * [`BTreeMap` and `BTreeSet` can iterate over ranges][27787]
1748 * [`Cell` can store non-`Copy` types][39793]. [RFC 1651]
1749 * [`String` implements `FromIterator<&char>`][40028]
1750 * `Box` [implements][40009] a number of new conversions:
1751 `From<Box<str>> for String`,
1752 `From<Box<[T]>> for Vec<T>`,
1753 `From<Box<CStr>> for CString`,
1754 `From<Box<OsStr>> for OsString`,
1755 `From<Box<Path>> for PathBuf`,
1756 `Into<Box<str>> for String`,
1757 `Into<Box<[T]>> for Vec<T>`,
1758 `Into<Box<CStr>> for CString`,
1759 `Into<Box<OsStr>> for OsString`,
1760 `Into<Box<Path>> for PathBuf`,
1761 `Default for Box<str>`,
1762 `Default for Box<CStr>`,
1763 `Default for Box<OsStr>`,
1764 `From<&CStr> for Box<CStr>`,
1765 `From<&OsStr> for Box<OsStr>`,
1766 `From<&Path> for Box<Path>`
1767 * [`ffi::FromBytesWithNulError` implements `Error` and `Display`][39960]
1768 * [Specialize `PartialOrd<A> for [A] where A: Ord`][39642]
1769 * [Slightly optimize `slice::sort`][39538]
1770 * [Add `ToString` trait specialization for `Cow<'a, str>` and `String`][39440]
1771 * [`Box<[T]>` implements `From<&[T]> where T: Copy`,
1772 `Box<str>` implements `From<&str>`][39438]
1773 * [`IpAddr` implements `From` for various arrays. `SocketAddr` implements
1774 `From<(I, u16)> where I: Into<IpAddr>`][39372]
1775 * [`format!` estimates the needed capacity before writing a string][39356]
1776 * [Support unprivileged symlink creation in Windows][38921]
1777 * [`PathBuf` implements `Default`][38764]
1778 * [Implement `PartialEq<[A]>` for `VecDeque<A>`][38661]
1779 * [`HashMap` resizes adaptively][38368] to guard against DOS attacks
1780 and poor hash functions.
1785 * [Add `cargo check --all`][cargo/3731]
1786 * [Add an option to ignore SSL revocation checking][cargo/3699]
1787 * [Add `cargo run --package`][cargo/3691]
1788 * [Add `required_features`][cargo/3667]
1789 * [Assume `build.rs` is a build script][cargo/3664]
1790 * [Find workspace via `workspace_root` link in containing member][cargo/3562]
1795 * [Documentation is rendered with mdbook instead of the obsolete, in-tree
1797 * [The "Unstable Book" documents nightly-only features][ubook]
1798 * [Improve the style of the sidebar in rustdoc output][40265]
1799 * [Configure build correctly on 64-bit CPU's with the armhf ABI][40261]
1800 * [Fix MSP430 breakage due to `i128`][40257]
1801 * [Preliminary Solaris/SPARCv9 support][39903]
1802 * [`rustc` is linked statically on Windows MSVC targets][39837], allowing it to
1803 run without installing the MSVC runtime.
1804 * [`rustdoc --test` includes file names in test names][39788]
1805 * This release includes builds of `std` for `sparc64-unknown-linux-gnu`,
1806 `aarch64-unknown-linux-fuchsia`, and `x86_64-unknown-linux-fuchsia`.
1807 * [Initial support for `aarch64-unknown-freebsd`][39491]
1808 * [Initial support for `i686-unknown-netbsd`][39426]
1809 * [This release no longer includes the old makefile build system][39431]. Rust
1810 is built with a custom build system, written in Rust, and with Cargo.
1811 * [Add Debug implementations for libcollection structs][39002]
1812 * [`TypeId` implements `PartialOrd` and `Ord`][38981]
1813 * [`--test-threads=0` produces an error][38945]
1814 * [`rustup` installs documentation by default][40526]
1815 * [The Rust source includes NatVis visualizations][39843]. These can be used by
1816 WinDbg and Visual Studio to improve the debugging experience.
1821 * [Rust 1.17 does not correctly detect the MSVC 2017 linker][38584]. As a
1822 workaround, either use MSVC 2015 or run vcvars.bat.
1823 * [When coercing to an unsized type lifetimes must be equal][40319]. That is,
1824 disallow subtyping between `T` and `U` when `T: Unsize<U>`, e.g. coercing
1825 `&mut [&'a X; N]` to `&mut [&'b X]` requires `'a` be equal to `'b`. Soundness
1827 * [`format!` and `Display::to_string` panic if an underlying formatting
1828 implementation returns an error][40117]. Previously the error was silently
1829 ignored. It is incorrect for `write_fmt` to return an error when writing
1831 * [In-tree crates are verified to be unstable][39851]. Previously, some minor
1832 crates were marked stable and could be accessed from the stable toolchain.
1833 * [Rust git source no longer includes vendored crates][39728]. Those that need
1834 to build with vendored crates should build from release tarballs.
1835 * [Fix inert attributes from `proc_macro_derives`][39572]
1836 * [During crate resolution, rustc prefers a crate in the sysroot if two crates
1837 are otherwise identical][39518]. Unlikely to be encountered outside the Rust
1839 * [Fixed bugs around how type inference interacts with dead-code][39485]. The
1840 existing code generally ignores the type of dead-code unless a type-hint is
1841 provided; this can cause surprising inference interactions particularly around
1842 defaulting. The new code uniformly ignores the result type of dead-code.
1843 * [Tuple-struct constructors with private fields are no longer visible][38932]
1844 * [Lifetime parameters that do not appear in the arguments are now considered
1845 early-bound][38897], resolving a soundness bug (#[32330]). The
1846 `hr_lifetime_in_assoc_type` future-compatibility lint has been in effect since
1848 * [rustdoc: fix doctests with non-feature crate attributes][38161]
1849 * [Make transmuting from fn item types to pointer-sized types a hard
1852 [27787]: https://github.com/rust-lang/rust/issues/27787
1853 [32330]: https://github.com/rust-lang/rust/issues/32330
1854 [34198]: https://github.com/rust-lang/rust/pull/34198
1855 [38161]: https://github.com/rust-lang/rust/pull/38161
1856 [38368]: https://github.com/rust-lang/rust/pull/38368
1857 [38584]: https://github.com/rust-lang/rust/issues/38584
1858 [38661]: https://github.com/rust-lang/rust/pull/38661
1859 [38764]: https://github.com/rust-lang/rust/pull/38764
1860 [38864]: https://github.com/rust-lang/rust/issues/38864
1861 [38897]: https://github.com/rust-lang/rust/pull/38897
1862 [38921]: https://github.com/rust-lang/rust/pull/38921
1863 [38932]: https://github.com/rust-lang/rust/pull/38932
1864 [38945]: https://github.com/rust-lang/rust/pull/38945
1865 [38981]: https://github.com/rust-lang/rust/pull/38981
1866 [39002]: https://github.com/rust-lang/rust/pull/39002
1867 [39116]: https://github.com/rust-lang/rust/pull/39116
1868 [39193]: https://github.com/rust-lang/rust/pull/39193
1869 [39265]: https://github.com/rust-lang/rust/pull/39265
1870 [39356]: https://github.com/rust-lang/rust/pull/39356
1871 [39372]: https://github.com/rust-lang/rust/pull/39372
1872 [39426]: https://github.com/rust-lang/rust/pull/39426
1873 [39431]: https://github.com/rust-lang/rust/pull/39431
1874 [39438]: https://github.com/rust-lang/rust/pull/39438
1875 [39440]: https://github.com/rust-lang/rust/pull/39440
1876 [39485]: https://github.com/rust-lang/rust/pull/39485
1877 [39491]: https://github.com/rust-lang/rust/pull/39491
1878 [39518]: https://github.com/rust-lang/rust/pull/39518
1879 [39538]: https://github.com/rust-lang/rust/pull/39538
1880 [39572]: https://github.com/rust-lang/rust/pull/39572
1881 [39633]: https://github.com/rust-lang/rust/pull/39633
1882 [39642]: https://github.com/rust-lang/rust/pull/39642
1883 [39728]: https://github.com/rust-lang/rust/pull/39728
1884 [39761]: https://github.com/rust-lang/rust/pull/39761
1885 [39788]: https://github.com/rust-lang/rust/pull/39788
1886 [39793]: https://github.com/rust-lang/rust/pull/39793
1887 [39837]: https://github.com/rust-lang/rust/pull/39837
1888 [39843]: https://github.com/rust-lang/rust/pull/39843
1889 [39851]: https://github.com/rust-lang/rust/pull/39851
1890 [39903]: https://github.com/rust-lang/rust/pull/39903
1891 [39939]: https://github.com/rust-lang/rust/pull/39939
1892 [39953]: https://github.com/rust-lang/rust/pull/39953
1893 [39960]: https://github.com/rust-lang/rust/pull/39960
1894 [39990]: https://github.com/rust-lang/rust/pull/39990
1895 [39995]: https://github.com/rust-lang/rust/pull/39995
1896 [40008]: https://github.com/rust-lang/rust/pull/40008
1897 [40009]: https://github.com/rust-lang/rust/pull/40009
1898 [40027]: https://github.com/rust-lang/rust/pull/40027
1899 [40028]: https://github.com/rust-lang/rust/pull/40028
1900 [40037]: https://github.com/rust-lang/rust/pull/40037
1901 [40117]: https://github.com/rust-lang/rust/pull/40117
1902 [40166]: https://github.com/rust-lang/rust/pull/40166
1903 [40245]: https://github.com/rust-lang/rust/pull/40245
1904 [40257]: https://github.com/rust-lang/rust/pull/40257
1905 [40261]: https://github.com/rust-lang/rust/pull/40261
1906 [40265]: https://github.com/rust-lang/rust/pull/40265
1907 [40319]: https://github.com/rust-lang/rust/pull/40319
1908 [40336]: https://github.com/rust-lang/rust/pull/40336
1909 [40526]: https://github.com/rust-lang/rust/pull/40526
1910 [RFC 1623]: https://github.com/rust-lang/rfcs/blob/master/text/1623-static.md
1911 [RFC 1647]: https://github.com/rust-lang/rfcs/blob/master/text/1647-allow-self-in-where-clauses.md
1912 [RFC 1651]: https://github.com/rust-lang/rfcs/blob/master/text/1651-movecell.md
1913 [RFC 1682]: https://github.com/rust-lang/rfcs/blob/master/text/1682-field-init-shorthand.md
1914 [`Arc::from_raw`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.from_raw
1915 [`Arc::into_raw`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.into_raw
1916 [`Arc::ptr_eq`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.ptr_eq
1917 [`BTreeMap::range_mut`]: https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.range_mut
1918 [`BTreeMap::range`]: https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.range
1919 [`Cell::into_inner`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.into_inner
1920 [`Cell::replace`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.replace
1921 [`Cell::swap`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.swap
1922 [`Cell::take`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.take
1923 [`Ordering::then_with`]: https://doc.rust-lang.org/std/cmp/enum.Ordering.html#method.then_with
1924 [`Ordering::then`]: https://doc.rust-lang.org/std/cmp/enum.Ordering.html#method.then
1925 [`Rc::from_raw`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.from_raw
1926 [`Rc::into_raw`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.into_raw
1927 [`Rc::ptr_eq`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.ptr_eq
1928 [`Result::expect_err`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.expect_err
1929 [`collections::Bound`]: https://doc.rust-lang.org/std/collections/enum.Bound.html
1930 [`process::abort`]: https://doc.rust-lang.org/std/process/fn.abort.html
1931 [`ptr::read_unaligned`]: https://doc.rust-lang.org/std/ptr/fn.read_unaligned.html
1932 [`ptr::write_unaligned`]: https://doc.rust-lang.org/std/ptr/fn.write_unaligned.html
1933 [cargo/3562]: https://github.com/rust-lang/cargo/pull/3562
1934 [cargo/3664]: https://github.com/rust-lang/cargo/pull/3664
1935 [cargo/3667]: https://github.com/rust-lang/cargo/pull/3667
1936 [cargo/3691]: https://github.com/rust-lang/cargo/pull/3691
1937 [cargo/3699]: https://github.com/rust-lang/cargo/pull/3699
1938 [cargo/3731]: https://github.com/rust-lang/cargo/pull/3731
1939 [mdbook]: https://crates.io/crates/mdbook
1940 [ubook]: https://doc.rust-lang.org/unstable-book/
1943 Version 1.16.0 (2017-03-16)
1944 ===========================
1949 * [The compiler's `dead_code` lint now accounts for type aliases][38051].
1950 * [Uninhabitable enums (those without any variants) no longer permit wildcard
1951 match patterns][38069]
1952 * [Clean up semantics of `self` in an import list][38313]
1953 * [`Self` may appear in `impl` headers][38920]
1954 * [`Self` may appear in struct expressions][39282]
1959 * [`rustc` now supports `--emit=metadata`, which causes rustc to emit
1960 a `.rmeta` file containing only crate metadata][38571]. This can be
1961 used by tools like the Rust Language Service to perform
1962 metadata-only builds.
1963 * [Levenshtein based typo suggestions now work in most places, while
1964 previously they worked only for fields and sometimes for local
1965 variables][38927]. Together with the overhaul of "no
1966 resolution"/"unexpected resolution" errors (#[38154]) they result in
1967 large and systematic improvement in resolution diagnostics.
1968 * [Fix `transmute::<T, U>` where `T` requires a bigger alignment than
1970 * [rustc: use -Xlinker when specifying an rpath with ',' in it][38798]
1971 * [`rustc` no longer attempts to provide "consider using an explicit
1972 lifetime" suggestions][37057]. They were inaccurate.
1977 * [`VecDeque::truncate`]
1978 * [`VecDeque::resize`]
1979 * [`String::insert_str`]
1980 * [`Duration::checked_add`]
1981 * [`Duration::checked_sub`]
1982 * [`Duration::checked_div`]
1983 * [`Duration::checked_mul`]
1986 * [`SocketAddr::is_ipv4`]
1987 * [`SocketAddr::is_ipv6`]
1988 * [`IpAddr::is_ipv4`]
1989 * [`IpAddr::is_ipv6`]
1991 * [`Vec::dedup_by_key`]
1992 * [`Result::unwrap_or_default`]
1993 * [`<*const T>::wrapping_offset`]
1994 * [`<*mut T>::wrapping_offset`]
1995 * `CommandExt::creation_flags`
1996 * [`File::set_permissions`]
1997 * [`String::split_off`]
2002 * [`[T]::binary_search` and `[T]::binary_search_by_key` now take
2003 their argument by `Borrow` parameter][37761]
2004 * [All public types in std implement `Debug`][38006]
2005 * [`IpAddr` implements `From<Ipv4Addr>` and `From<Ipv6Addr>`][38327]
2006 * [`Ipv6Addr` implements `From<[u16; 8]>`][38131]
2007 * [Ctrl-Z returns from `Stdin.read()` when reading from the console on
2009 * [std: Fix partial writes in `LineWriter`][38062]
2010 * [std: Clamp max read/write sizes on Unix][38062]
2011 * [Use more specific panic message for `&str` slicing errors][38066]
2012 * [`TcpListener::set_only_v6` is deprecated][38304]. This
2013 functionality cannot be achieved in std currently.
2014 * [`writeln!`, like `println!`, now accepts a form with no string
2015 or formatting arguments, to just print a newline][38469]
2016 * [Implement `iter::Sum` and `iter::Product` for `Result`][38580]
2017 * [Reduce the size of static data in `std_unicode::tables`][38781]
2018 * [`char::EscapeDebug`, `EscapeDefault`, `EscapeUnicode`,
2019 `CaseMappingIter`, `ToLowercase`, `ToUppercase`, implement
2021 * [`Duration` implements `Sum`][38712]
2022 * [`String` implements `ToSocketAddrs`][39048]
2027 * [The `cargo check` command does a type check of a project without
2028 building it][cargo/3296]
2029 * [crates.io will display CI badges from Travis and AppVeyor, if
2030 specified in Cargo.toml][cargo/3546]
2031 * [crates.io will display categories listed in Cargo.toml][cargo/3301]
2032 * [Compilation profiles accept integer values for `debug`, in addition
2033 to `true` and `false`. These are passed to `rustc` as the value to
2034 `-C debuginfo`][cargo/3534]
2035 * [Implement `cargo --version --verbose`][cargo/3604]
2036 * [All builds now output 'dep-info' build dependencies compatible with
2037 make and ninja][cargo/3557]
2038 * [Build all workspace members with `build --all`][cargo/3511]
2039 * [Document all workspace members with `doc --all`][cargo/3515]
2040 * [Path deps outside workspace are not members][cargo/3443]
2045 * [`rustdoc` has a `--sysroot` argument that, like `rustc`, specifies
2046 the path to the Rust implementation][38589]
2047 * [The `armv7-linux-androideabi` target no longer enables NEON
2048 extensions, per Google's ABI guide][38413]
2049 * [The stock standard library can be compiled for Redox OS][38401]
2050 * [Rust has initial SPARC support][38726]. Tier 3. No builds
2052 * [Rust has experimental support for Nvidia PTX][38559]. Tier 3. No
2054 * [Fix backtraces on i686-pc-windows-gnu by disabling FPO][39379]
2059 * [Uninhabitable enums (those without any variants) no longer permit wildcard
2060 match patterns][38069]
2061 * In this release, references to uninhabited types can not be
2062 pattern-matched. This was accidentally allowed in 1.15.
2063 * [The compiler's `dead_code` lint now accounts for type aliases][38051].
2064 * [Ctrl-Z returns from `Stdin.read()` when reading from the console on
2066 * [Clean up semantics of `self` in an import list][38313]
2067 * Reimplemented lifetime elision. This change was almost entirely compatible
2068 with existing code, but it did close a number of small bugs and loopholes,
2069 as well as being more accepting in some other [cases][41105].
2071 [37057]: https://github.com/rust-lang/rust/pull/37057
2072 [37761]: https://github.com/rust-lang/rust/pull/37761
2073 [38006]: https://github.com/rust-lang/rust/pull/38006
2074 [38051]: https://github.com/rust-lang/rust/pull/38051
2075 [38062]: https://github.com/rust-lang/rust/pull/38062
2076 [38062]: https://github.com/rust-lang/rust/pull/38622
2077 [38066]: https://github.com/rust-lang/rust/pull/38066
2078 [38069]: https://github.com/rust-lang/rust/pull/38069
2079 [38131]: https://github.com/rust-lang/rust/pull/38131
2080 [38154]: https://github.com/rust-lang/rust/pull/38154
2081 [38274]: https://github.com/rust-lang/rust/pull/38274
2082 [38304]: https://github.com/rust-lang/rust/pull/38304
2083 [38313]: https://github.com/rust-lang/rust/pull/38313
2084 [38314]: https://github.com/rust-lang/rust/pull/38314
2085 [38327]: https://github.com/rust-lang/rust/pull/38327
2086 [38401]: https://github.com/rust-lang/rust/pull/38401
2087 [38413]: https://github.com/rust-lang/rust/pull/38413
2088 [38469]: https://github.com/rust-lang/rust/pull/38469
2089 [38559]: https://github.com/rust-lang/rust/pull/38559
2090 [38571]: https://github.com/rust-lang/rust/pull/38571
2091 [38580]: https://github.com/rust-lang/rust/pull/38580
2092 [38589]: https://github.com/rust-lang/rust/pull/38589
2093 [38670]: https://github.com/rust-lang/rust/pull/38670
2094 [38712]: https://github.com/rust-lang/rust/pull/38712
2095 [38726]: https://github.com/rust-lang/rust/pull/38726
2096 [38781]: https://github.com/rust-lang/rust/pull/38781
2097 [38798]: https://github.com/rust-lang/rust/pull/38798
2098 [38909]: https://github.com/rust-lang/rust/pull/38909
2099 [38920]: https://github.com/rust-lang/rust/pull/38920
2100 [38927]: https://github.com/rust-lang/rust/pull/38927
2101 [39048]: https://github.com/rust-lang/rust/pull/39048
2102 [39282]: https://github.com/rust-lang/rust/pull/39282
2103 [39379]: https://github.com/rust-lang/rust/pull/39379
2104 [41105]: https://github.com/rust-lang/rust/issues/41105
2105 [`<*const T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset
2106 [`<*mut T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset
2107 [`Duration::checked_add`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_add
2108 [`Duration::checked_div`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_div
2109 [`Duration::checked_mul`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_mul
2110 [`Duration::checked_sub`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_sub
2111 [`File::set_permissions`]: https://doc.rust-lang.org/std/fs/struct.File.html#method.set_permissions
2112 [`IpAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv4
2113 [`IpAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv6
2114 [`Result::unwrap_or_default`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.unwrap_or_default
2115 [`SocketAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv4
2116 [`SocketAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv6
2117 [`String::insert_str`]: https://doc.rust-lang.org/std/string/struct.String.html#method.insert_str
2118 [`String::split_off`]: https://doc.rust-lang.org/std/string/struct.String.html#method.split_off
2119 [`Vec::dedup_by_key`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by_key
2120 [`Vec::dedup_by`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by
2121 [`VecDeque::resize`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.resize
2122 [`VecDeque::truncate`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.truncate
2123 [`str::repeat`]: https://doc.rust-lang.org/std/primitive.str.html#method.repeat
2124 [`str::replacen`]: https://doc.rust-lang.org/std/primitive.str.html#method.replacen
2125 [cargo/3296]: https://github.com/rust-lang/cargo/pull/3296
2126 [cargo/3301]: https://github.com/rust-lang/cargo/pull/3301
2127 [cargo/3443]: https://github.com/rust-lang/cargo/pull/3443
2128 [cargo/3511]: https://github.com/rust-lang/cargo/pull/3511
2129 [cargo/3515]: https://github.com/rust-lang/cargo/pull/3515
2130 [cargo/3534]: https://github.com/rust-lang/cargo/pull/3534
2131 [cargo/3546]: https://github.com/rust-lang/cargo/pull/3546
2132 [cargo/3557]: https://github.com/rust-lang/cargo/pull/3557
2133 [cargo/3604]: https://github.com/rust-lang/cargo/pull/3604
2134 [RFC 1623]: https://github.com/rust-lang/rfcs/blob/master/text/1623-static.md
2137 Version 1.15.1 (2017-02-09)
2138 ===========================
2140 * [Fix IntoIter::as_mut_slice's signature][39466]
2141 * [Compile compiler builtins with `-fPIC` on 32-bit platforms][39523]
2143 [39466]: https://github.com/rust-lang/rust/pull/39466
2144 [39523]: https://github.com/rust-lang/rust/pull/39523
2147 Version 1.15.0 (2017-02-02)
2148 ===========================
2153 * Basic procedural macros allowing custom `#[derive]`, aka "macros 1.1", are
2154 stable. This allows popular code-generating crates like Serde and Diesel to
2155 work ergonomically. [RFC 1681].
2156 * [Tuple structs may be empty. Unary and empty tuple structs may be instantiated
2157 with curly braces][36868]. Part of [RFC 1506].
2158 * [A number of minor changes to name resolution have been activated][37127].
2159 They add up to more consistent semantics, allowing for future evolution of
2160 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
2161 details of what is different. The breaking changes here have been transitioned
2162 through the [`legacy_imports`] lint since 1.14, with no known regressions.
2163 * [In `macro_rules`, `path` fragments can now be parsed as type parameter
2165 * [`?Sized` can be used in `where` clauses][37791]
2166 * [There is now a limit on the size of monomorphized types and it can be
2167 modified with the `#![type_size_limit]` crate attribute, similarly to
2168 the `#![recursion_limit]` attribute][37789]
2173 * [On Windows, the compiler will apply dllimport attributes when linking to
2174 extern functions][37973]. Additional attributes and flags can control which
2175 library kind is linked and its name. [RFC 1717].
2176 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
2177 * [The `--test` flag works with procedural macro crates][38107]
2178 * [Fix `extern "aapcs" fn` ABI][37814]
2179 * [The `-C no-stack-check` flag is deprecated][37636]. It does nothing.
2180 * [The `format!` expander recognizes incorrect `printf` and shell-style
2181 formatting directives and suggests the correct format][37613].
2182 * [Only report one error for all unused imports in an import list][37456]
2184 Compiler Performance
2185 --------------------
2187 * [Avoid unnecessary `mk_ty` calls in `Ty::super_fold_with`][37705]
2188 * [Avoid more unnecessary `mk_ty` calls in `Ty::super_fold_with`][37979]
2189 * [Don't clone in `UnificationTable::probe`][37848]
2190 * [Remove `scope_auxiliary` to cut RSS by 10%][37764]
2191 * [Use small vectors in type walker][37760]
2192 * [Macro expansion performance was improved][37701]
2193 * [Change `HirVec<P<T>>` to `HirVec<T>` in `hir::Expr`][37642]
2194 * [Replace FNV with a faster hash function][37229]
2199 * [`std::iter::Iterator::min_by`]
2200 * [`std::iter::Iterator::max_by`]
2201 * [`std::os::*::fs::FileExt`]
2202 * [`std::sync::atomic::Atomic*::get_mut`]
2203 * [`std::sync::atomic::Atomic*::into_inner`]
2204 * [`std::vec::IntoIter::as_slice`]
2205 * [`std::vec::IntoIter::as_mut_slice`]
2206 * [`std::sync::mpsc::Receiver::try_iter`]
2207 * [`std::os::unix::process::CommandExt::before_exec`]
2208 * [`std::rc::Rc::strong_count`]
2209 * [`std::rc::Rc::weak_count`]
2210 * [`std::sync::Arc::strong_count`]
2211 * [`std::sync::Arc::weak_count`]
2212 * [`std::char::encode_utf8`]
2213 * [`std::char::encode_utf16`]
2214 * [`std::cell::Ref::clone`]
2215 * [`std::io::Take::into_inner`]
2220 * [The standard sorting algorithm has been rewritten for dramatic performance
2221 improvements][38192]. It is a hybrid merge sort, drawing influences from
2222 Timsort. Previously it was a naive merge sort.
2223 * [`Iterator::nth` no longer has a `Sized` bound][38134]
2224 * [`Extend<&T>` is specialized for `Vec` where `T: Copy`][38182] to improve
2226 * [`chars().count()` is much faster][37888] and so are [`chars().last()`
2227 and `char_indices().last()`][37882]
2228 * [Fix ARM Objective-C ABI in `std::env::args`][38146]
2229 * [Chinese characters display correctly in `fmt::Debug`][37855]
2230 * [Derive `Default` for `Duration`][37699]
2231 * [Support creation of anonymous pipes on WinXP/2k][37677]
2232 * [`mpsc::RecvTimeoutError` implements `Error`][37527]
2233 * [Don't pass overlapped handles to processes][38835]
2238 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
2239 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
2240 should instead check the variable at runtime with `std::env`. That the value
2241 was set at build time was a bug, and incorrect when cross-compiling. This
2242 change is known to cause breakage.
2243 * [Add `--all` flag to `cargo test`][cargo/3221]
2244 * [Compile statically against the MSVC CRT][cargo/3363]
2245 * [Mix feature flags into fingerprint/metadata shorthash][cargo/3102]
2246 * [Link OpenSSL statically on OSX][cargo/3311]
2247 * [Apply new fingerprinting to build dir outputs][cargo/3310]
2248 * [Test for bad path overrides with summaries][cargo/3336]
2249 * [Require `cargo install --vers` to take a semver version][cargo/3338]
2250 * [Fix retrying crate downloads for network errors][cargo/3348]
2251 * [Implement string lookup for `build.rustflags` config key][cargo/3356]
2252 * [Emit more info on --message-format=json][cargo/3319]
2253 * [Assume `build.rs` in the same directory as `Cargo.toml` is a build script][cargo/3361]
2254 * [Don't ignore errors in workspace manifest][cargo/3409]
2255 * [Fix `--message-format JSON` when rustc emits non-JSON warnings][cargo/3410]
2260 * [Test runners (binaries built with `--test`) now support a `--list` argument
2261 that lists the tests it contains][38185]
2262 * [Test runners now support a `--exact` argument that makes the test filter
2263 match exactly, instead of matching only a substring of the test name][38181]
2264 * [rustdoc supports a `--playground-url` flag][37763]
2265 * [rustdoc provides more details about `#[should_panic]` errors][37749]
2270 * [The Rust build system is now written in Rust][37817]. The Makefiles may
2271 continue to be used in this release by passing `--disable-rustbuild` to the
2272 configure script, but they will be deleted soon. Note that the new build
2273 system uses a different on-disk layout that will likely affect any scripts
2275 * [Rust supports i686-unknown-openbsd][38086]. Tier 3 support. No testing or
2277 * [Rust supports the MSP430][37627]. Tier 3 support. No testing or releases.
2278 * [Rust supports the ARMv5TE architecture][37615]. Tier 3 support. No testing or
2284 * [A number of minor changes to name resolution have been activated][37127].
2285 They add up to more consistent semantics, allowing for future evolution of
2286 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
2287 details of what is different. The breaking changes here have been transitioned
2288 through the [`legacy_imports`] lint since 1.14, with no known regressions.
2289 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
2290 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
2291 should instead check the variable at runtime with `std::env`. That the value
2292 was set at build time was a bug, and incorrect when cross-compiling. This
2293 change is known to cause breakage.
2294 * [Higher-ranked lifetimes are no longer allowed to appear _only_ in associated
2295 types][33685]. The [`hr_lifetime_in_assoc_type` lint] has been a warning since
2296 1.10 and is now an error by default. It will become a hard error in the near
2298 * [The semantics relating modules to file system directories are changing in
2299 minor ways][37602]. This is captured in the new `legacy_directory_ownership`
2300 lint, which is a warning in this release, and will become a hard error in the
2302 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
2303 * [Once `Peekable` peeks a `None` it will return that `None` without re-querying
2304 the underlying iterator][37834]
2306 ["changes"]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md#changes-to-name-resolution-rules
2307 [33685]: https://github.com/rust-lang/rust/issues/33685
2308 [36868]: https://github.com/rust-lang/rust/pull/36868
2309 [37127]: https://github.com/rust-lang/rust/pull/37127
2310 [37229]: https://github.com/rust-lang/rust/pull/37229
2311 [37456]: https://github.com/rust-lang/rust/pull/37456
2312 [37527]: https://github.com/rust-lang/rust/pull/37527
2313 [37602]: https://github.com/rust-lang/rust/pull/37602
2314 [37613]: https://github.com/rust-lang/rust/pull/37613
2315 [37615]: https://github.com/rust-lang/rust/pull/37615
2316 [37636]: https://github.com/rust-lang/rust/pull/37636
2317 [37627]: https://github.com/rust-lang/rust/pull/37627
2318 [37642]: https://github.com/rust-lang/rust/pull/37642
2319 [37677]: https://github.com/rust-lang/rust/pull/37677
2320 [37699]: https://github.com/rust-lang/rust/pull/37699
2321 [37701]: https://github.com/rust-lang/rust/pull/37701
2322 [37705]: https://github.com/rust-lang/rust/pull/37705
2323 [37749]: https://github.com/rust-lang/rust/pull/37749
2324 [37760]: https://github.com/rust-lang/rust/pull/37760
2325 [37763]: https://github.com/rust-lang/rust/pull/37763
2326 [37764]: https://github.com/rust-lang/rust/pull/37764
2327 [37789]: https://github.com/rust-lang/rust/pull/37789
2328 [37791]: https://github.com/rust-lang/rust/pull/37791
2329 [37814]: https://github.com/rust-lang/rust/pull/37814
2330 [37817]: https://github.com/rust-lang/rust/pull/37817
2331 [37834]: https://github.com/rust-lang/rust/pull/37834
2332 [37848]: https://github.com/rust-lang/rust/pull/37848
2333 [37855]: https://github.com/rust-lang/rust/pull/37855
2334 [37882]: https://github.com/rust-lang/rust/pull/37882
2335 [37888]: https://github.com/rust-lang/rust/pull/37888
2336 [37973]: https://github.com/rust-lang/rust/pull/37973
2337 [37979]: https://github.com/rust-lang/rust/pull/37979
2338 [38086]: https://github.com/rust-lang/rust/pull/38086
2339 [38107]: https://github.com/rust-lang/rust/pull/38107
2340 [38117]: https://github.com/rust-lang/rust/pull/38117
2341 [38134]: https://github.com/rust-lang/rust/pull/38134
2342 [38146]: https://github.com/rust-lang/rust/pull/38146
2343 [38181]: https://github.com/rust-lang/rust/pull/38181
2344 [38182]: https://github.com/rust-lang/rust/pull/38182
2345 [38185]: https://github.com/rust-lang/rust/pull/38185
2346 [38192]: https://github.com/rust-lang/rust/pull/38192
2347 [38279]: https://github.com/rust-lang/rust/pull/38279
2348 [38835]: https://github.com/rust-lang/rust/pull/38835
2349 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
2350 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
2351 [RFC 1560]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md
2352 [RFC 1681]: https://github.com/rust-lang/rfcs/blob/master/text/1681-macros-1.1.md
2353 [RFC 1717]: https://github.com/rust-lang/rfcs/blob/master/text/1717-dllimport.md
2354 [`hr_lifetime_in_assoc_type` lint]: https://github.com/rust-lang/rust/issues/33685
2355 [`legacy_imports`]: https://github.com/rust-lang/rust/pull/38271
2356 [cargo/3102]: https://github.com/rust-lang/cargo/pull/3102
2357 [cargo/3221]: https://github.com/rust-lang/cargo/pull/3221
2358 [cargo/3310]: https://github.com/rust-lang/cargo/pull/3310
2359 [cargo/3311]: https://github.com/rust-lang/cargo/pull/3311
2360 [cargo/3319]: https://github.com/rust-lang/cargo/pull/3319
2361 [cargo/3336]: https://github.com/rust-lang/cargo/pull/3336
2362 [cargo/3338]: https://github.com/rust-lang/cargo/pull/3338
2363 [cargo/3348]: https://github.com/rust-lang/cargo/pull/3348
2364 [cargo/3356]: https://github.com/rust-lang/cargo/pull/3356
2365 [cargo/3361]: https://github.com/rust-lang/cargo/pull/3361
2366 [cargo/3363]: https://github.com/rust-lang/cargo/pull/3363
2367 [cargo/3368]: https://github.com/rust-lang/cargo/issues/3368
2368 [cargo/3409]: https://github.com/rust-lang/cargo/pull/3409
2369 [cargo/3410]: https://github.com/rust-lang/cargo/pull/3410
2370 [`std::iter::Iterator::min_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.min_by
2371 [`std::iter::Iterator::max_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.max_by
2372 [`std::os::*::fs::FileExt`]: https://doc.rust-lang.org/std/os/unix/fs/trait.FileExt.html
2373 [`std::sync::atomic::Atomic*::get_mut`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.get_mut
2374 [`std::sync::atomic::Atomic*::into_inner`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.into_inner
2375 [`std::vec::IntoIter::as_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_slice
2376 [`std::vec::IntoIter::as_mut_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_mut_slice
2377 [`std::sync::mpsc::Receiver::try_iter`]: https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.try_iter
2378 [`std::os::unix::process::CommandExt::before_exec`]: https://doc.rust-lang.org/std/os/unix/process/trait.CommandExt.html#tymethod.before_exec
2379 [`std::rc::Rc::strong_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.strong_count
2380 [`std::rc::Rc::weak_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.weak_count
2381 [`std::sync::Arc::strong_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.strong_count
2382 [`std::sync::Arc::weak_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.weak_count
2383 [`std::char::encode_utf8`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf8
2384 [`std::char::encode_utf16`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf16
2385 [`std::cell::Ref::clone`]: https://doc.rust-lang.org/std/cell/struct.Ref.html#method.clone
2386 [`std::io::Take::into_inner`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.into_inner
2389 Version 1.14.0 (2016-12-22)
2390 ===========================
2395 * [`..` matches multiple tuple fields in enum variants, structs
2396 and tuples][36843]. [RFC 1492].
2397 * [Safe `fn` items can be coerced to `unsafe fn` pointers][37389]
2398 * [`use *` and `use ::*` both glob-import from the crate root][37367]
2399 * [It's now possible to call a `Vec<Box<Fn()>>` without explicit
2400 dereferencing][36822]
2405 * [Mark enums with non-zero discriminant as non-zero][37224]
2406 * [Lower-case `static mut` names are linted like other
2407 statics and consts][37162]
2408 * [Fix ICE on some macros in const integer positions
2409 (e.g. `[u8; m!()]`)][36819]
2410 * [Improve error message and snippet for "did you mean `x`"][36798]
2411 * [Add a panic-strategy field to the target specification][36794]
2412 * [Include LLVM version in `--version --verbose`][37200]
2414 Compile-time Optimizations
2415 --------------------------
2417 * [Improve macro expansion performance][37569]
2418 * [Shrink `Expr_::ExprInlineAsm`][37445]
2419 * [Replace all uses of SHA-256 with BLAKE2b][37439]
2420 * [Reduce the number of bytes hashed by `IchHasher`][37427]
2421 * [Avoid more allocations when compiling html5ever][37373]
2422 * [Use `SmallVector` in `CombineFields::instantiate`][37322]
2423 * [Avoid some allocations in the macro parser][37318]
2424 * [Use a faster deflate setting][37298]
2425 * [Add `ArrayVec` and `AccumulateVec` to reduce heap allocations
2426 during interning of slices][37270]
2427 * [Optimize `write_metadata`][37267]
2428 * [Don't process obligation forest cycles when stalled][37231]
2429 * [Avoid many `CrateConfig` clones][37161]
2430 * [Optimize `Substs::super_fold_with`][37108]
2431 * [Optimize `ObligationForest`'s `NodeState` handling][36993]
2432 * [Speed up `plug_leaks`][36917]
2437 * [`println!()`, with no arguments, prints newline][36825].
2438 Previously, an empty string was required to achieve the same.
2439 * [`Wrapping` impls standard binary and unary operators, as well as
2440 the `Sum` and `Product` iterators][37356]
2441 * [Implement `From<Cow<str>> for String` and `From<Cow<[T]>> for
2443 * [Improve `fold` performance for `chain`, `cloned`, `map`, and
2444 `VecDeque` iterators][37315]
2445 * [Improve `SipHasher` performance on small values][37312]
2446 * [Add Iterator trait TrustedLen to enable better FromIterator /
2448 * [Expand `.zip()` specialization to `.map()` and `.cloned()`][37230]
2449 * [`ReadDir` implements `Debug`][37221]
2450 * [Implement `RefUnwindSafe` for atomic types][37178]
2451 * [Specialize `Vec::extend` to `Vec::extend_from_slice`][37094]
2452 * [Avoid allocations in `Decoder::read_str`][37064]
2453 * [`io::Error` implements `From<io::ErrorKind>`][37037]
2454 * [Impl `Debug` for raw pointers to unsized data][36880]
2455 * [Don't reuse `HashMap` random seeds][37470]
2456 * [The internal memory layout of `HashMap` is more cache-friendly, for
2457 significant improvements in some operations][36692]
2458 * [`HashMap` uses less memory on 32-bit architectures][36595]
2459 * [Impl `Add<{str, Cow<str>}>` for `Cow<str>`][36430]
2464 * [Expose rustc cfg values to build scripts][cargo/3243]
2465 * [Allow cargo to work with read-only `CARGO_HOME`][cargo/3259]
2466 * [Fix passing --features when testing multiple packages][cargo/3280]
2467 * [Use a single profile set per workspace][cargo/3249]
2468 * [Load `replace` sections from lock files][cargo/3220]
2469 * [Ignore `panic` configuration for test/bench profiles][cargo/3175]
2474 * [rustup is the recommended Rust installation method][1.14rustup]
2475 * This release includes host (rustc) builds for Linux on MIPS, PowerPC, and
2476 S390x. These are [tier 2] platforms and may have major defects. Follow the
2477 instructions on the website to install, or add the targets to an existing
2478 installation with `rustup target add`. The new target triples are:
2479 - `mips-unknown-linux-gnu`
2480 - `mipsel-unknown-linux-gnu`
2481 - `mips64-unknown-linux-gnuabi64`
2482 - `mips64el-unknown-linux-gnuabi64 `
2483 - `powerpc-unknown-linux-gnu`
2484 - `powerpc64-unknown-linux-gnu`
2485 - `powerpc64le-unknown-linux-gnu`
2486 - `s390x-unknown-linux-gnu `
2487 * This release includes target (std) builds for ARM Linux running MUSL
2488 libc. These are [tier 2] platforms and may have major defects. Add the
2489 following triples to an existing rustup installation with `rustup target add`:
2490 - `arm-unknown-linux-musleabi`
2491 - `arm-unknown-linux-musleabihf`
2492 - `armv7-unknown-linux-musleabihf`
2493 * This release includes [experimental support for WebAssembly][1.14wasm], via
2494 the `wasm32-unknown-emscripten` target. This target is known to have major
2495 defects. Please test, report, and fix.
2496 * rustup no longer installs documentation by default. Run `rustup
2497 component add rust-docs` to install.
2498 * [Fix line stepping in debugger][37310]
2499 * [Enable line number debuginfo in releases][37280]
2504 * [Disable jemalloc on aarch64/powerpc/mips][37392]
2505 * [Add support for Fuchsia OS][37313]
2506 * [Detect local-rebuild by only MAJOR.MINOR version][37273]
2511 * [A number of forward-compatibility lints used by the compiler
2512 to gradually introduce language changes have been converted
2513 to deny by default][36894]:
2514 - ["use of inaccessible extern crate erroneously allowed"][36886]
2515 - ["type parameter default erroneously allowed in invalid location"][36887]
2516 - ["detects super or self keywords at the beginning of global path"][36888]
2517 - ["two overlapping inherent impls define an item with the same name
2518 were erroneously allowed"][36889]
2519 - ["floating-point constants cannot be used in patterns"][36890]
2520 - ["constants of struct or enum type can only be used in a pattern if
2521 the struct or enum has `#[derive(PartialEq, Eq)]`"][36891]
2522 - ["lifetimes or labels named `'_` were erroneously allowed"][36892]
2523 * [Prohibit patterns in trait methods without bodies][37378]
2524 * [The atomic `Ordering` enum may not be matched exhaustively][37351]
2525 * [Future-proofing `#[no_link]` breaks some obscure cases][37247]
2526 * [The `$crate` macro variable is accepted in fewer locations][37213]
2527 * [Impls specifying extra region requirements beyond the trait
2528 they implement are rejected][37167]
2529 * [Enums may not be unsized][37111]. Unsized enums are intended to
2530 work but never have. For now they are forbidden.
2531 * [Enforce the shadowing restrictions from RFC 1560 for today's macros][36767]
2533 [tier 2]: https://forge.rust-lang.org/platform-support.html
2534 [1.14rustup]: https://internals.rust-lang.org/t/beta-testing-rustup-rs/3316/204
2535 [1.14wasm]: https://users.rust-lang.org/t/compiling-to-the-web-with-rust-and-emscripten/7627
2536 [36430]: https://github.com/rust-lang/rust/pull/36430
2537 [36595]: https://github.com/rust-lang/rust/pull/36595
2538 [36595]: https://github.com/rust-lang/rust/pull/36595
2539 [36692]: https://github.com/rust-lang/rust/pull/36692
2540 [36767]: https://github.com/rust-lang/rust/pull/36767
2541 [36794]: https://github.com/rust-lang/rust/pull/36794
2542 [36798]: https://github.com/rust-lang/rust/pull/36798
2543 [36819]: https://github.com/rust-lang/rust/pull/36819
2544 [36822]: https://github.com/rust-lang/rust/pull/36822
2545 [36825]: https://github.com/rust-lang/rust/pull/36825
2546 [36843]: https://github.com/rust-lang/rust/pull/36843
2547 [36880]: https://github.com/rust-lang/rust/pull/36880
2548 [36886]: https://github.com/rust-lang/rust/issues/36886
2549 [36887]: https://github.com/rust-lang/rust/issues/36887
2550 [36888]: https://github.com/rust-lang/rust/issues/36888
2551 [36889]: https://github.com/rust-lang/rust/issues/36889
2552 [36890]: https://github.com/rust-lang/rust/issues/36890
2553 [36891]: https://github.com/rust-lang/rust/issues/36891
2554 [36892]: https://github.com/rust-lang/rust/issues/36892
2555 [36894]: https://github.com/rust-lang/rust/pull/36894
2556 [36917]: https://github.com/rust-lang/rust/pull/36917
2557 [36993]: https://github.com/rust-lang/rust/pull/36993
2558 [37037]: https://github.com/rust-lang/rust/pull/37037
2559 [37064]: https://github.com/rust-lang/rust/pull/37064
2560 [37094]: https://github.com/rust-lang/rust/pull/37094
2561 [37108]: https://github.com/rust-lang/rust/pull/37108
2562 [37111]: https://github.com/rust-lang/rust/pull/37111
2563 [37161]: https://github.com/rust-lang/rust/pull/37161
2564 [37162]: https://github.com/rust-lang/rust/pull/37162
2565 [37167]: https://github.com/rust-lang/rust/pull/37167
2566 [37178]: https://github.com/rust-lang/rust/pull/37178
2567 [37200]: https://github.com/rust-lang/rust/pull/37200
2568 [37213]: https://github.com/rust-lang/rust/pull/37213
2569 [37221]: https://github.com/rust-lang/rust/pull/37221
2570 [37224]: https://github.com/rust-lang/rust/pull/37224
2571 [37230]: https://github.com/rust-lang/rust/pull/37230
2572 [37231]: https://github.com/rust-lang/rust/pull/37231
2573 [37247]: https://github.com/rust-lang/rust/pull/37247
2574 [37267]: https://github.com/rust-lang/rust/pull/37267
2575 [37270]: https://github.com/rust-lang/rust/pull/37270
2576 [37273]: https://github.com/rust-lang/rust/pull/37273
2577 [37280]: https://github.com/rust-lang/rust/pull/37280
2578 [37298]: https://github.com/rust-lang/rust/pull/37298
2579 [37306]: https://github.com/rust-lang/rust/pull/37306
2580 [37310]: https://github.com/rust-lang/rust/pull/37310
2581 [37312]: https://github.com/rust-lang/rust/pull/37312
2582 [37313]: https://github.com/rust-lang/rust/pull/37313
2583 [37315]: https://github.com/rust-lang/rust/pull/37315
2584 [37318]: https://github.com/rust-lang/rust/pull/37318
2585 [37322]: https://github.com/rust-lang/rust/pull/37322
2586 [37326]: https://github.com/rust-lang/rust/pull/37326
2587 [37351]: https://github.com/rust-lang/rust/pull/37351
2588 [37356]: https://github.com/rust-lang/rust/pull/37356
2589 [37367]: https://github.com/rust-lang/rust/pull/37367
2590 [37373]: https://github.com/rust-lang/rust/pull/37373
2591 [37378]: https://github.com/rust-lang/rust/pull/37378
2592 [37389]: https://github.com/rust-lang/rust/pull/37389
2593 [37392]: https://github.com/rust-lang/rust/pull/37392
2594 [37427]: https://github.com/rust-lang/rust/pull/37427
2595 [37439]: https://github.com/rust-lang/rust/pull/37439
2596 [37445]: https://github.com/rust-lang/rust/pull/37445
2597 [37470]: https://github.com/rust-lang/rust/pull/37470
2598 [37569]: https://github.com/rust-lang/rust/pull/37569
2599 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
2600 [cargo/3175]: https://github.com/rust-lang/cargo/pull/3175
2601 [cargo/3220]: https://github.com/rust-lang/cargo/pull/3220
2602 [cargo/3243]: https://github.com/rust-lang/cargo/pull/3243
2603 [cargo/3249]: https://github.com/rust-lang/cargo/pull/3249
2604 [cargo/3259]: https://github.com/rust-lang/cargo/pull/3259
2605 [cargo/3280]: https://github.com/rust-lang/cargo/pull/3280
2608 Version 1.13.0 (2016-11-10)
2609 ===========================
2614 * [Stabilize the `?` operator][36995]. `?` is a simple way to propagate
2615 errors, like the `try!` macro, described in [RFC 0243].
2616 * [Stabilize macros in type position][36014]. Described in [RFC 873].
2617 * [Stabilize attributes on statements][36995]. Described in [RFC 0016].
2618 * [Fix `#[derive]` for empty tuple structs/variants][35728]
2619 * [Fix lifetime rules for 'if' conditions][36029]
2620 * [Avoid loading and parsing unconfigured non-inline modules][36482]
2625 * [Add the `-C link-arg` argument][36574]
2626 * [Remove the old AST-based backend from rustc_trans][35764]
2627 * [Don't enable NEON by default on armv7 Linux][35814]
2628 * [Fix debug line number info for macro expansions][35238]
2629 * [Do not emit "class method" debuginfo for types that are not
2630 DICompositeType][36008]
2631 * [Warn about multiple conflicting #[repr] hints][34623]
2632 * [When sizing DST, don't double-count nested struct prefixes][36351]
2633 * [Default RUST_MIN_STACK to 16MiB for now][36505]
2634 * [Improve rlib metadata format][36551]. Reduces rlib size significantly.
2635 * [Reject macros with empty repetitions to avoid infinite loop][36721]
2636 * [Expand macros without recursing to avoid stack overflows][36214]
2641 * [Replace macro backtraces with labeled local uses][35702]
2642 * [Improve error message for misplaced doc comments][33922]
2643 * [Buffer unix and lock windows to prevent message interleaving][35975]
2644 * [Update lifetime errors to specifically note temporaries][36171]
2645 * [Special case a few colors for Windows][36178]
2646 * [Suggest `use self` when such an import resolves][36289]
2647 * [Be more specific when type parameter shadows primitive type][36338]
2648 * Many minor improvements
2650 Compile-time Optimizations
2651 --------------------------
2653 * [Compute and cache HIR hashes at beginning][35854]
2654 * [Don't hash types in loan paths][36004]
2655 * [Cache projections in trans][35761]
2656 * [Optimize the parser's last token handling][36527]
2657 * [Only instantiate #[inline] functions in codegen units referencing
2658 them][36524]. This leads to big improvements in cases where crates export
2659 define many inline functions without using them directly.
2660 * [Lazily allocate TypedArena's first chunk][36592]
2661 * [Don't allocate during default HashSet creation][36734]
2668 * [`overflowing_abs`]
2669 * [`RefCell::try_borrow`]
2670 * [`RefCell::try_borrow_mut`]
2675 * [Add `assert_ne!` and `debug_assert_ne!`][35074]
2676 * [Make `vec_deque::Drain`, `hash_map::Drain`, and `hash_set::Drain`
2678 * [Implement `AsRef<[T]>` for `std::slice::Iter`][35559]
2679 * [Implement `Debug` for `std::vec::IntoIter`][35707]
2680 * [`CString`: avoid excessive growth just to 0-terminate][35871]
2681 * [Implement `CoerceUnsized` for `{Cell, RefCell, UnsafeCell}`][35627]
2682 * [Use arc4rand on FreeBSD][35884]
2683 * [memrchr: Correct aligned offset computation][35969]
2684 * [Improve Demangling of Rust Symbols][36059]
2685 * [Use monotonic time in condition variables][35048]
2686 * [Implement `Debug` for `std::path::{Components,Iter}`][36101]
2687 * [Implement conversion traits for `char`][35755]
2688 * [Fix illegal instruction caused by overflow in channel cloning][36104]
2689 * [Zero first byte of CString on drop][36264]
2690 * [Inherit overflow checks for sum and product][36372]
2691 * [Add missing Eq implementations][36423]
2692 * [Implement `Debug` for `DirEntry`][36631]
2693 * [When `getaddrinfo` returns `EAI_SYSTEM` retrieve actual error from
2695 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
2696 * [Implement more traits for `std::io::ErrorKind`][35911]
2697 * [Optimize BinaryHeap bounds checking][36072]
2698 * [Work around pointer aliasing issue in `Vec::extend_from_slice`,
2699 `extend_with_element`][36355]
2700 * [Fix overflow checking in unsigned pow()][34942]
2705 * This release includes security fixes to both curl and OpenSSL.
2706 * [Fix transitive doctests when panic=abort][cargo/3021]
2707 * [Add --all-features flag to cargo][cargo/3038]
2708 * [Reject path-based dependencies in `cargo package`][cargo/3060]
2709 * [Don't parse the home directory more than once][cargo/3078]
2710 * [Don't try to generate Cargo.lock on empty workspaces][cargo/3092]
2711 * [Update OpenSSL to 1.0.2j][cargo/3121]
2712 * [Add license and license_file to cargo metadata output][cargo/3110]
2713 * [Make crates-io registry URL optional in config; ignore all changes to
2714 source.crates-io][cargo/3089]
2715 * [Don't download dependencies from other platforms][cargo/3123]
2716 * [Build transitive dev-dependencies when needed][cargo/3125]
2717 * [Add support for per-target rustflags in .cargo/config][cargo/3157]
2718 * [Avoid updating registry when adding existing deps][cargo/3144]
2719 * [Warn about path overrides that won't work][cargo/3136]
2720 * [Use workspaces during `cargo install`][cargo/3146]
2721 * [Leak mspdbsrv.exe processes on Windows][cargo/3162]
2722 * [Add --message-format flag][cargo/3000]
2723 * [Pass target environment for rustdoc][cargo/3205]
2724 * [Use `CommandExt::exec` for `cargo run` on Unix][cargo/2818]
2725 * [Update curl and curl-sys][cargo/3241]
2726 * [Call rustdoc test with the correct cfg flags of a package][cargo/3242]
2731 * [rustdoc: Add the `--sysroot` argument][36586]
2732 * [rustdoc: Fix a couple of issues with the search results][35655]
2733 * [rustdoc: remove the `!` from macro URLs and titles][35234]
2734 * [gdb: Fix pretty-printing special-cased Rust types][35585]
2735 * [rustdoc: Filter more incorrect methods inherited through Deref][36266]
2740 * [Remove unmaintained style guide][35124]
2741 * [Add s390x support][36369]
2742 * [Initial work at Haiku OS support][36727]
2743 * [Add mips-uclibc targets][35734]
2744 * [Crate-ify compiler-rt into compiler-builtins][35021]
2745 * [Add rustc version info (git hash + date) to dist tarball][36213]
2746 * Many documentation improvements
2751 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
2752 * [Deny (by default) transmuting from fn item types to pointer-sized
2753 types][34923]. Continuing the long transition to zero-sized fn items,
2755 * [Fix `#[derive]` for empty tuple structs/variants][35728].
2757 * [Issue deprecation warnings for safe accesses to extern statics][36173]
2758 * [Fix lifetime rules for 'if' conditions][36029].
2759 * [Inherit overflow checks for sum and product][36372].
2760 * [Forbid user-defined macros named "macro_rules"][36730].
2762 [33922]: https://github.com/rust-lang/rust/pull/33922
2763 [34623]: https://github.com/rust-lang/rust/pull/34623
2764 [34923]: https://github.com/rust-lang/rust/pull/34923
2765 [34942]: https://github.com/rust-lang/rust/pull/34942
2766 [34982]: https://github.com/rust-lang/rust/pull/34982
2767 [35021]: https://github.com/rust-lang/rust/pull/35021
2768 [35048]: https://github.com/rust-lang/rust/pull/35048
2769 [35074]: https://github.com/rust-lang/rust/pull/35074
2770 [35124]: https://github.com/rust-lang/rust/pull/35124
2771 [35234]: https://github.com/rust-lang/rust/pull/35234
2772 [35238]: https://github.com/rust-lang/rust/pull/35238
2773 [35354]: https://github.com/rust-lang/rust/pull/35354
2774 [35559]: https://github.com/rust-lang/rust/pull/35559
2775 [35585]: https://github.com/rust-lang/rust/pull/35585
2776 [35627]: https://github.com/rust-lang/rust/pull/35627
2777 [35655]: https://github.com/rust-lang/rust/pull/35655
2778 [35702]: https://github.com/rust-lang/rust/pull/35702
2779 [35707]: https://github.com/rust-lang/rust/pull/35707
2780 [35728]: https://github.com/rust-lang/rust/pull/35728
2781 [35734]: https://github.com/rust-lang/rust/pull/35734
2782 [35755]: https://github.com/rust-lang/rust/pull/35755
2783 [35761]: https://github.com/rust-lang/rust/pull/35761
2784 [35764]: https://github.com/rust-lang/rust/pull/35764
2785 [35814]: https://github.com/rust-lang/rust/pull/35814
2786 [35854]: https://github.com/rust-lang/rust/pull/35854
2787 [35871]: https://github.com/rust-lang/rust/pull/35871
2788 [35884]: https://github.com/rust-lang/rust/pull/35884
2789 [35911]: https://github.com/rust-lang/rust/pull/35911
2790 [35969]: https://github.com/rust-lang/rust/pull/35969
2791 [35975]: https://github.com/rust-lang/rust/pull/35975
2792 [36004]: https://github.com/rust-lang/rust/pull/36004
2793 [36008]: https://github.com/rust-lang/rust/pull/36008
2794 [36014]: https://github.com/rust-lang/rust/pull/36014
2795 [36029]: https://github.com/rust-lang/rust/pull/36029
2796 [36059]: https://github.com/rust-lang/rust/pull/36059
2797 [36072]: https://github.com/rust-lang/rust/pull/36072
2798 [36101]: https://github.com/rust-lang/rust/pull/36101
2799 [36104]: https://github.com/rust-lang/rust/pull/36104
2800 [36171]: https://github.com/rust-lang/rust/pull/36171
2801 [36173]: https://github.com/rust-lang/rust/pull/36173
2802 [36178]: https://github.com/rust-lang/rust/pull/36178
2803 [36213]: https://github.com/rust-lang/rust/pull/36213
2804 [36214]: https://github.com/rust-lang/rust/pull/36214
2805 [36264]: https://github.com/rust-lang/rust/pull/36264
2806 [36266]: https://github.com/rust-lang/rust/pull/36266
2807 [36289]: https://github.com/rust-lang/rust/pull/36289
2808 [36338]: https://github.com/rust-lang/rust/pull/36338
2809 [36351]: https://github.com/rust-lang/rust/pull/36351
2810 [36355]: https://github.com/rust-lang/rust/pull/36355
2811 [36369]: https://github.com/rust-lang/rust/pull/36369
2812 [36372]: https://github.com/rust-lang/rust/pull/36372
2813 [36423]: https://github.com/rust-lang/rust/pull/36423
2814 [36482]: https://github.com/rust-lang/rust/pull/36482
2815 [36505]: https://github.com/rust-lang/rust/pull/36505
2816 [36524]: https://github.com/rust-lang/rust/pull/36524
2817 [36527]: https://github.com/rust-lang/rust/pull/36527
2818 [36551]: https://github.com/rust-lang/rust/pull/36551
2819 [36574]: https://github.com/rust-lang/rust/pull/36574
2820 [36586]: https://github.com/rust-lang/rust/pull/36586
2821 [36592]: https://github.com/rust-lang/rust/pull/36592
2822 [36631]: https://github.com/rust-lang/rust/pull/36631
2823 [36639]: https://github.com/rust-lang/rust/pull/36639
2824 [36721]: https://github.com/rust-lang/rust/pull/36721
2825 [36727]: https://github.com/rust-lang/rust/pull/36727
2826 [36730]: https://github.com/rust-lang/rust/pull/36730
2827 [36734]: https://github.com/rust-lang/rust/pull/36734
2828 [36754]: https://github.com/rust-lang/rust/pull/36754
2829 [36995]: https://github.com/rust-lang/rust/pull/36995
2830 [RFC 0016]: https://github.com/rust-lang/rfcs/blob/master/text/0016-more-attributes.md
2831 [RFC 0243]: https://github.com/rust-lang/rfcs/blob/master/text/0243-trait-based-exception-handling.md
2832 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
2833 [RFC 401]: https://github.com/rust-lang/rfcs/blob/master/text/0401-coercions.md
2834 [RFC 873]: https://github.com/rust-lang/rfcs/blob/master/text/0873-type-macros.md
2835 [cargo/2818]: https://github.com/rust-lang/cargo/pull/2818
2836 [cargo/3000]: https://github.com/rust-lang/cargo/pull/3000
2837 [cargo/3021]: https://github.com/rust-lang/cargo/pull/3021
2838 [cargo/3038]: https://github.com/rust-lang/cargo/pull/3038
2839 [cargo/3060]: https://github.com/rust-lang/cargo/pull/3060
2840 [cargo/3078]: https://github.com/rust-lang/cargo/pull/3078
2841 [cargo/3089]: https://github.com/rust-lang/cargo/pull/3089
2842 [cargo/3092]: https://github.com/rust-lang/cargo/pull/3092
2843 [cargo/3110]: https://github.com/rust-lang/cargo/pull/3110
2844 [cargo/3121]: https://github.com/rust-lang/cargo/pull/3121
2845 [cargo/3123]: https://github.com/rust-lang/cargo/pull/3123
2846 [cargo/3125]: https://github.com/rust-lang/cargo/pull/3125
2847 [cargo/3136]: https://github.com/rust-lang/cargo/pull/3136
2848 [cargo/3144]: https://github.com/rust-lang/cargo/pull/3144
2849 [cargo/3146]: https://github.com/rust-lang/cargo/pull/3146
2850 [cargo/3157]: https://github.com/rust-lang/cargo/pull/3157
2851 [cargo/3162]: https://github.com/rust-lang/cargo/pull/3162
2852 [cargo/3205]: https://github.com/rust-lang/cargo/pull/3205
2853 [cargo/3241]: https://github.com/rust-lang/cargo/pull/3241
2854 [cargo/3242]: https://github.com/rust-lang/cargo/pull/3242
2855 [rustup]: https://www.rustup.rs
2856 [`checked_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.checked_abs
2857 [`wrapping_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.wrapping_abs
2858 [`overflowing_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.overflowing_abs
2859 [`RefCell::try_borrow`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow
2860 [`RefCell::try_borrow_mut`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow_mut
2861 [`SipHasher`]: https://doc.rust-lang.org/std/hash/struct.SipHasher.html
2862 [`DefaultHasher`]: https://doc.rust-lang.org/std/collections/hash_map/struct.DefaultHasher.html
2865 Version 1.12.1 (2016-10-20)
2866 ===========================
2871 * [ICE: 'rustc' panicked at 'assertion failed: concrete_substs.is_normalized_for_trans()' #36381][36381]
2872 * [Confusion with double negation and booleans][36856]
2873 * [rustc 1.12.0 fails with SIGSEGV in release mode (syn crate 0.8.0)][36875]
2874 * [Rustc 1.12.0 Windows build of `ethcore` crate fails with LLVM error][36924]
2875 * [1.12.0: High memory usage when linking in release mode with debug info][36926]
2876 * [Corrupted memory after updated to 1.12][36936]
2877 * ["Let NullaryConstructor = something;" causes internal compiler error: "tried to overwrite interned AdtDef"][37026]
2878 * [Fix ICE: inject bitcast if types mismatch for invokes/calls/stores][37112]
2879 * [debuginfo: Handle spread_arg case in MIR-trans in a more stable way.][37153]
2881 [36381]: https://github.com/rust-lang/rust/issues/36381
2882 [36856]: https://github.com/rust-lang/rust/issues/36856
2883 [36875]: https://github.com/rust-lang/rust/issues/36875
2884 [36924]: https://github.com/rust-lang/rust/issues/36924
2885 [36926]: https://github.com/rust-lang/rust/issues/36926
2886 [36936]: https://github.com/rust-lang/rust/issues/36936
2887 [37026]: https://github.com/rust-lang/rust/issues/37026
2888 [37112]: https://github.com/rust-lang/rust/issues/37112
2889 [37153]: https://github.com/rust-lang/rust/issues/37153
2892 Version 1.12.0 (2016-09-29)
2893 ===========================
2898 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)](https://github.com/rust-lang/rust/pull/34096).
2899 This translation pass is far simpler than the previous AST->LLVM pass, and
2900 creates opportunities to perform new optimizations directly on the MIR. It
2901 was previously described [on the Rust blog](https://blog.rust-lang.org/2016/04/19/MIR.html).
2902 * [`rustc` presents a new, more readable error format, along with
2903 machine-readable JSON error output for use by IDEs](https://github.com/rust-lang/rust/pull/35401).
2904 Most common editors supporting Rust have been updated to work with it. It was
2905 previously described [on the Rust blog](https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
2910 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)](https://github.com/rust-lang/rust/pull/34096).
2911 This translation pass is far simpler than the previous AST->LLVM pass, and
2912 creates opportunities to perform new optimizations directly on the MIR. It
2913 was previously described [on the Rust blog](https://blog.rust-lang.org/2016/04/19/MIR.html).
2914 * [Print the Rust target name, not the LLVM target name, with
2915 `--print target-list`](https://github.com/rust-lang/rust/pull/35489)
2916 * [The computation of `TypeId` is correct in some cases where it was previously
2917 producing inconsistent results](https://github.com/rust-lang/rust/pull/35267)
2918 * [The `mips-unknown-linux-gnu` target uses hardware floating point by default](https://github.com/rust-lang/rust/pull/34910)
2919 * [The `rustc` arguments, `--print target-cpus`, `--print target-features`,
2920 `--print relocation-models`, and `--print code-models` print the available
2921 options to the `-C target-cpu`, `-C target-feature`, `-C relocation-model` and
2922 `-C code-model` code generation arguments](https://github.com/rust-lang/rust/pull/34845)
2923 * [`rustc` supports three new MUSL targets on ARM: `arm-unknown-linux-musleabi`,
2924 `arm-unknown-linux-musleabihf`, and `armv7-unknown-linux-musleabihf`](https://github.com/rust-lang/rust/pull/35060).
2925 These targets produce statically-linked binaries. There are no binary release
2931 * [`rustc` presents a new, more readable error format, along with
2932 machine-readable JSON error output for use by IDEs](https://github.com/rust-lang/rust/pull/35401).
2933 Most common editors supporting Rust have been updated to work with it. It was
2934 previously described [on the Rust blog](https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
2935 * [In error descriptions, references are now described in plain English,
2936 instead of as "&-ptr"](https://github.com/rust-lang/rust/pull/35611)
2937 * [In error type descriptions, unknown numeric types are named `{integer}` or
2938 `{float}` instead of `_`](https://github.com/rust-lang/rust/pull/35080)
2939 * [`rustc` emits a clearer error when inner attributes follow a doc comment](https://github.com/rust-lang/rust/pull/34676)
2944 * [`macro_rules!` invocations can be made within `macro_rules!` invocations](https://github.com/rust-lang/rust/pull/34925)
2945 * [`macro_rules!` meta-variables are hygienic](https://github.com/rust-lang/rust/pull/35453)
2946 * [`macro_rules!` `tt` matchers can be reparsed correctly, making them much more
2947 useful](https://github.com/rust-lang/rust/pull/34908)
2948 * [`macro_rules!` `stmt` matchers correctly consume the entire contents when
2949 inside non-braces invocations](https://github.com/rust-lang/rust/pull/34886)
2950 * [Semicolons are properly required as statement delimiters inside
2951 `macro_rules!` invocations](https://github.com/rust-lang/rust/pull/34660)
2952 * [`cfg_attr` works on `path` attributes](https://github.com/rust-lang/rust/pull/34546)
2957 * [`Cell::as_ptr`](https://doc.rust-lang.org/std/cell/struct.Cell.html#method.as_ptr)
2958 * [`RefCell::as_ptr`](https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.as_ptr)
2959 * [`IpAddr::is_unspecified`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_unspecified)
2960 * [`IpAddr::is_loopback`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_loopback)
2961 * [`IpAddr::is_multicast`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_multicast)
2962 * [`Ipv4Addr::is_unspecified`](https://doc.rust-lang.org/std/net/struct.Ipv4Addr.html#method.is_unspecified)
2963 * [`Ipv6Addr::octets`](https://doc.rust-lang.org/std/net/struct.Ipv6Addr.html#method.octets)
2964 * [`LinkedList::contains`](https://doc.rust-lang.org/std/collections/linked_list/struct.LinkedList.html#method.contains)
2965 * [`VecDeque::contains`](https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.contains)
2966 * [`ExitStatusExt::from_raw`](https://doc.rust-lang.org/std/os/unix/process/trait.ExitStatusExt.html#tymethod.from_raw).
2967 Both on Unix and Windows.
2968 * [`Receiver::recv_timeout`](https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.recv_timeout)
2969 * [`RecvTimeoutError`](https://doc.rust-lang.org/std/sync/mpsc/enum.RecvTimeoutError.html)
2970 * [`BinaryHeap::peek_mut`](https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.peek_mut)
2971 * [`PeekMut`](https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html)
2972 * [`iter::Product`](https://doc.rust-lang.org/std/iter/trait.Product.html)
2973 * [`iter::Sum`](https://doc.rust-lang.org/std/iter/trait.Sum.html)
2974 * [`OccupiedEntry::remove_entry`](https://doc.rust-lang.org/std/collections/btree_map/struct.OccupiedEntry.html#method.remove_entry)
2975 * [`VacantEntry::into_key`](https://doc.rust-lang.org/std/collections/btree_map/struct.VacantEntry.html#method.into_key)
2980 * [The `format!` macro and friends now allow a single argument to be formatted
2981 in multiple styles](https://github.com/rust-lang/rust/pull/33642)
2982 * [The lifetime bounds on `[T]::binary_search_by` and
2983 `[T]::binary_search_by_key` have been adjusted to be more flexible](https://github.com/rust-lang/rust/pull/34762)
2984 * [`Option` implements `From` for its contained type](https://github.com/rust-lang/rust/pull/34828)
2985 * [`Cell`, `RefCell` and `UnsafeCell` implement `From` for their contained type](https://github.com/rust-lang/rust/pull/35392)
2986 * [`RwLock` panics if the reader count overflows](https://github.com/rust-lang/rust/pull/35378)
2987 * [`vec_deque::Drain`, `hash_map::Drain` and `hash_set::Drain` are covariant](https://github.com/rust-lang/rust/pull/35354)
2988 * [`vec::Drain` and `binary_heap::Drain` are covariant](https://github.com/rust-lang/rust/pull/34951)
2989 * [`Cow<str>` implements `FromIterator` for `char`, `&str` and `String`](https://github.com/rust-lang/rust/pull/35064)
2990 * [Sockets on Linux are correctly closed in subprocesses via `SOCK_CLOEXEC`](https://github.com/rust-lang/rust/pull/34946)
2991 * [`hash_map::Entry`, `hash_map::VacantEntry` and `hash_map::OccupiedEntry`
2992 implement `Debug`](https://github.com/rust-lang/rust/pull/34937)
2993 * [`btree_map::Entry`, `btree_map::VacantEntry` and `btree_map::OccupiedEntry`
2994 implement `Debug`](https://github.com/rust-lang/rust/pull/34885)
2995 * [`String` implements `AddAssign`](https://github.com/rust-lang/rust/pull/34890)
2996 * [Variadic `extern fn` pointers implement the `Clone`, `PartialEq`, `Eq`,
2997 `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and `fmt::Debug` traits](https://github.com/rust-lang/rust/pull/34879)
2998 * [`FileType` implements `Debug`](https://github.com/rust-lang/rust/pull/34757)
2999 * [References to `Mutex` and `RwLock` are unwind-safe](https://github.com/rust-lang/rust/pull/34756)
3000 * [`mpsc::sync_channel` `Receiver`s return any available message before
3001 reporting a disconnect](https://github.com/rust-lang/rust/pull/34731)
3002 * [Unicode definitions have been updated to 9.0](https://github.com/rust-lang/rust/pull/34599)
3003 * [`env` iterators implement `DoubleEndedIterator`](https://github.com/rust-lang/rust/pull/33312)
3008 * [Support local mirrors of registries](https://github.com/rust-lang/cargo/pull/2857)
3009 * [Add support for command aliases](https://github.com/rust-lang/cargo/pull/2679)
3010 * [Allow `opt-level="s"` / `opt-level="z"` in profile overrides](https://github.com/rust-lang/cargo/pull/3007)
3011 * [Make `cargo doc --open --target` work as expected](https://github.com/rust-lang/cargo/pull/2988)
3012 * [Speed up noop registry updates](https://github.com/rust-lang/cargo/pull/2974)
3013 * [Update OpenSSL](https://github.com/rust-lang/cargo/pull/2971)
3014 * [Fix `--panic=abort` with plugins](https://github.com/rust-lang/cargo/pull/2954)
3015 * [Always pass `-C metadata` to the compiler](https://github.com/rust-lang/cargo/pull/2946)
3016 * [Fix depending on git repos with workspaces](https://github.com/rust-lang/cargo/pull/2938)
3017 * [Add a `--lib` flag to `cargo new`](https://github.com/rust-lang/cargo/pull/2921)
3018 * [Add `http.cainfo` for custom certs](https://github.com/rust-lang/cargo/pull/2917)
3019 * [Indicate the compilation profile after compiling](https://github.com/rust-lang/cargo/pull/2909)
3020 * [Allow enabling features for dependencies with `--features`](https://github.com/rust-lang/cargo/pull/2876)
3021 * [Add `--jobs` flag to `cargo package`](https://github.com/rust-lang/cargo/pull/2867)
3022 * [Add `--dry-run` to `cargo publish`](https://github.com/rust-lang/cargo/pull/2849)
3023 * [Add support for `RUSTDOCFLAGS`](https://github.com/rust-lang/cargo/pull/2794)
3028 * [`panic::catch_unwind` is more optimized](https://github.com/rust-lang/rust/pull/35444)
3029 * [`panic::catch_unwind` no longer accesses thread-local storage on entry](https://github.com/rust-lang/rust/pull/34866)
3034 * [Test binaries now support a `--test-threads` argument to specify the number
3035 of threads used to run tests, and which acts the same as the
3036 `RUST_TEST_THREADS` environment variable](https://github.com/rust-lang/rust/pull/35414)
3037 * [The test runner now emits a warning when tests run over 60 seconds](https://github.com/rust-lang/rust/pull/35405)
3038 * [rustdoc: Fix methods in search results](https://github.com/rust-lang/rust/pull/34752)
3039 * [`rust-lldb` warns about unsupported versions of LLDB](https://github.com/rust-lang/rust/pull/34646)
3040 * [Rust releases now come with source packages that can be installed by rustup
3041 via `rustup component add rust-src`](https://github.com/rust-lang/rust/pull/34366).
3042 The resulting source code can be used by tools and IDES, located in the
3043 sysroot under `lib/rustlib/src`.
3048 * [The compiler can now be built against LLVM 3.9](https://github.com/rust-lang/rust/pull/35594)
3049 * Many minor improvements to the documentation.
3050 * [The Rust exception handling "personality" routine is now written in Rust](https://github.com/rust-lang/rust/pull/34832)
3055 * [When printing Windows `OsStr`s, unpaired surrogate codepoints are escaped
3056 with the lowercase format instead of the uppercase](https://github.com/rust-lang/rust/pull/35084)
3057 * [When formatting strings, if "precision" is specified, the "fill",
3058 "align" and "width" specifiers are no longer ignored](https://github.com/rust-lang/rust/pull/34544)
3059 * [The `Debug` impl for strings no longer escapes all non-ASCII characters](https://github.com/rust-lang/rust/pull/34485)
3062 Version 1.11.0 (2016-08-18)
3063 ===========================
3068 * [`cfg_attr` works on `path` attributes](https://github.com/rust-lang/rust/pull/34546)
3069 * [Support nested `cfg_attr` attributes](https://github.com/rust-lang/rust/pull/34216)
3070 * [Allow statement-generating braced macro invocations at the end of blocks](https://github.com/rust-lang/rust/pull/34436)
3071 * [Macros can be expanded inside of trait definitions](https://github.com/rust-lang/rust/pull/34213)
3072 * [`#[macro_use]` works properly when it is itself expanded from a macro](https://github.com/rust-lang/rust/pull/34032)
3077 * [`BinaryHeap::append`](https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.append)
3078 * [`BTreeMap::append`](https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.append)
3079 * [`BTreeMap::split_off`](https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.split_off)
3080 * [`BTreeSet::append`](https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.append)
3081 * [`BTreeSet::split_off`](https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.split_off)
3082 * [`f32::to_degrees`](https://doc.rust-lang.org/std/primitive.f32.html#method.to_degrees)
3083 (in libcore - previously stabilized in libstd)
3084 * [`f32::to_radians`](https://doc.rust-lang.org/std/primitive.f32.html#method.to_radians)
3085 (in libcore - previously stabilized in libstd)
3086 * [`f64::to_degrees`](https://doc.rust-lang.org/std/primitive.f64.html#method.to_degrees)
3087 (in libcore - previously stabilized in libstd)
3088 * [`f64::to_radians`](https://doc.rust-lang.org/std/primitive.f64.html#method.to_radians)
3089 (in libcore - previously stabilized in libstd)
3090 * [`Iterator::sum`](https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
3091 * [`Iterator::product`](https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
3092 * [`Cell::get_mut`](https://doc.rust-lang.org/std/cell/struct.Cell.html#method.get_mut)
3093 * [`RefCell::get_mut`](https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.get_mut)
3098 * [The `thread_local!` macro supports multiple definitions in a single
3099 invocation, and can apply attributes](https://github.com/rust-lang/rust/pull/34077)
3100 * [`Cow` implements `Default`](https://github.com/rust-lang/rust/pull/34305)
3101 * [`Wrapping` implements binary, octal, lower-hex and upper-hex
3102 `Display` formatting](https://github.com/rust-lang/rust/pull/34190)
3103 * [The range types implement `Hash`](https://github.com/rust-lang/rust/pull/34180)
3104 * [`lookup_host` ignores unknown address types](https://github.com/rust-lang/rust/pull/34067)
3105 * [`assert_eq!` accepts a custom error message, like `assert!` does](https://github.com/rust-lang/rust/pull/33976)
3106 * [The main thread is now called "main" instead of "<main>"](https://github.com/rust-lang/rust/pull/33803)
3111 * [Disallow specifying features of transitive deps](https://github.com/rust-lang/cargo/pull/2821)
3112 * [Add color support for Windows consoles](https://github.com/rust-lang/cargo/pull/2804)
3113 * [Fix `harness = false` on `[lib]` sections](https://github.com/rust-lang/cargo/pull/2795)
3114 * [Don't panic when `links` contains a '.'](https://github.com/rust-lang/cargo/pull/2787)
3115 * [Build scripts can emit warnings](https://github.com/rust-lang/cargo/pull/2630),
3116 and `-vv` prints warnings for all crates.
3117 * [Ignore file locks on OS X NFS mounts](https://github.com/rust-lang/cargo/pull/2720)
3118 * [Don't warn about `package.metadata` keys](https://github.com/rust-lang/cargo/pull/2668).
3119 This provides room for expansion by arbitrary tools.
3120 * [Add support for cdylib crate types](https://github.com/rust-lang/cargo/pull/2741)
3121 * [Prevent publishing crates when files are dirty](https://github.com/rust-lang/cargo/pull/2781)
3122 * [Don't fetch all crates on clean](https://github.com/rust-lang/cargo/pull/2704)
3123 * [Propagate --color option to rustc](https://github.com/rust-lang/cargo/pull/2779)
3124 * [Fix `cargo doc --open` on Windows](https://github.com/rust-lang/cargo/pull/2780)
3125 * [Improve autocompletion](https://github.com/rust-lang/cargo/pull/2772)
3126 * [Configure colors of stderr as well as stdout](https://github.com/rust-lang/cargo/pull/2739)
3131 * [Caching projections speeds up type check dramatically for some
3132 workloads](https://github.com/rust-lang/rust/pull/33816)
3133 * [The default `HashMap` hasher is SipHash 1-3 instead of SipHash 2-4](https://github.com/rust-lang/rust/pull/33940)
3134 This hasher is faster, but is believed to provide sufficient
3135 protection from collision attacks.
3136 * [Comparison of `Ipv4Addr` is 10x faster](https://github.com/rust-lang/rust/pull/33891)
3141 * [Fix empty implementation section on some module pages](https://github.com/rust-lang/rust/pull/34536)
3142 * [Fix inlined renamed re-exports in import lists](https://github.com/rust-lang/rust/pull/34479)
3143 * [Fix search result layout for enum variants and struct fields](https://github.com/rust-lang/rust/pull/34477)
3144 * [Fix issues with source links to external crates](https://github.com/rust-lang/rust/pull/34387)
3145 * [Fix redirect pages for renamed re-exports](https://github.com/rust-lang/rust/pull/34245)
3150 * [rustc is better at finding the MSVC toolchain](https://github.com/rust-lang/rust/pull/34492)
3151 * [When emitting debug info, rustc emits frame pointers for closures,
3152 shims and glue, as it does for all other functions](https://github.com/rust-lang/rust/pull/33909)
3153 * [rust-lldb warns about unsupported versions of LLDB](https://github.com/rust-lang/rust/pull/34646)
3154 * Many more errors have been given error codes and extended
3156 * API documentation continues to be improved, with many new examples
3161 * [rustc no longer hangs when dependencies recursively re-export
3162 submodules](https://github.com/rust-lang/rust/pull/34542)
3163 * [rustc requires LLVM 3.7+](https://github.com/rust-lang/rust/pull/34104)
3164 * [The 'How Safe and Unsafe Interact' chapter of The Rustonomicon was
3165 rewritten](https://github.com/rust-lang/rust/pull/33895)
3166 * [rustc support 16-bit pointer sizes](https://github.com/rust-lang/rust/pull/33460).
3167 No targets use this yet, but it works toward AVR support.
3172 * [`const`s and `static`s may not have unsized types](https://github.com/rust-lang/rust/pull/34443)
3173 * [The new follow-set rules that place restrictions on `macro_rules!`
3174 in order to ensure syntax forward-compatibility have been enabled](https://github.com/rust-lang/rust/pull/33982)
3175 This was an [amendment to RFC 550](https://github.com/rust-lang/rfcs/pull/1384),
3176 and has been a warning since 1.10.
3177 * [`cfg` attribute process has been refactored to fix various bugs](https://github.com/rust-lang/rust/pull/33706).
3178 This causes breakage in some corner cases.
3181 Version 1.10.0 (2016-07-07)
3182 ===========================
3187 * [Allow `concat_idents!` in type positions as well as in expression
3188 positions](https://github.com/rust-lang/rust/pull/33735).
3189 * [`Copy` types are required to have a trivial implementation of `Clone`](https://github.com/rust-lang/rust/pull/33420).
3190 [RFC 1521](https://github.com/rust-lang/rfcs/blob/master/text/1521-copy-clone-semantics.md).
3191 * [Single-variant enums support the `#[repr(..)]` attribute](https://github.com/rust-lang/rust/pull/33355).
3192 * [Fix `#[derive(RustcEncodable)]` in the presence of other `encode` methods](https://github.com/rust-lang/rust/pull/32908).
3193 * [`panic!` can be converted to a runtime abort with the
3194 `-C panic=abort` flag](https://github.com/rust-lang/rust/pull/32900).
3195 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
3196 * [Add a new crate type, 'cdylib'](https://github.com/rust-lang/rust/pull/33553).
3197 cdylibs are dynamic libraries suitable for loading by non-Rust hosts.
3198 [RFC 1510](https://github.com/rust-lang/rfcs/blob/master/text/1510-cdylib.md).
3199 Note that Cargo does not yet directly support cdylibs.
3204 * `os::windows::fs::OpenOptionsExt::access_mode`
3205 * `os::windows::fs::OpenOptionsExt::share_mode`
3206 * `os::windows::fs::OpenOptionsExt::custom_flags`
3207 * `os::windows::fs::OpenOptionsExt::attributes`
3208 * `os::windows::fs::OpenOptionsExt::security_qos_flags`
3209 * `os::unix::fs::OpenOptionsExt::custom_flags`
3210 * [`sync::Weak::new`](http://doc.rust-lang.org/alloc/arc/struct.Weak.html#method.new)
3211 * `Default for sync::Weak`
3212 * [`panic::set_hook`](http://doc.rust-lang.org/std/panic/fn.set_hook.html)
3213 * [`panic::take_hook`](http://doc.rust-lang.org/std/panic/fn.take_hook.html)
3214 * [`panic::PanicInfo`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html)
3215 * [`panic::PanicInfo::payload`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.payload)
3216 * [`panic::PanicInfo::location`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.location)
3217 * [`panic::Location`](http://doc.rust-lang.org/std/panic/struct.Location.html)
3218 * [`panic::Location::file`](http://doc.rust-lang.org/std/panic/struct.Location.html#method.file)
3219 * [`panic::Location::line`](http://doc.rust-lang.org/std/panic/struct.Location.html#method.line)
3220 * [`ffi::CStr::from_bytes_with_nul`](http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul)
3221 * [`ffi::CStr::from_bytes_with_nul_unchecked`](http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul_unchecked)
3222 * [`ffi::FromBytesWithNulError`](http://doc.rust-lang.org/std/ffi/struct.FromBytesWithNulError.html)
3223 * [`fs::Metadata::modified`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.modified)
3224 * [`fs::Metadata::accessed`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.accessed)
3225 * [`fs::Metadata::created`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.created)
3226 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange`
3227 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange_weak`
3228 * `collections::{btree,hash}_map::{Occupied,Vacant,}Entry::key`
3229 * `os::unix::net::{UnixStream, UnixListener, UnixDatagram, SocketAddr}`
3230 * [`SocketAddr::is_unnamed`](http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.is_unnamed)
3231 * [`SocketAddr::as_pathname`](http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.as_pathname)
3232 * [`UnixStream::connect`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.connect)
3233 * [`UnixStream::pair`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.pair)
3234 * [`UnixStream::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.try_clone)
3235 * [`UnixStream::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.local_addr)
3236 * [`UnixStream::peer_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.peer_addr)
3237 * [`UnixStream::set_read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
3238 * [`UnixStream::set_write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
3239 * [`UnixStream::read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
3240 * [`UnixStream::write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
3241 * [`UnixStream::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.set_nonblocking)
3242 * [`UnixStream::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.take_error)
3243 * [`UnixStream::shutdown`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.shutdown)
3244 * Read/Write/RawFd impls for `UnixStream`
3245 * [`UnixListener::bind`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.bind)
3246 * [`UnixListener::accept`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.accept)
3247 * [`UnixListener::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.try_clone)
3248 * [`UnixListener::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.local_addr)
3249 * [`UnixListener::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.set_nonblocking)
3250 * [`UnixListener::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.take_error)
3251 * [`UnixListener::incoming`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.incoming)
3252 * RawFd impls for `UnixListener`
3253 * [`UnixDatagram::bind`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.bind)
3254 * [`UnixDatagram::unbound`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.unbound)
3255 * [`UnixDatagram::pair`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.pair)
3256 * [`UnixDatagram::connect`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.connect)
3257 * [`UnixDatagram::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.try_clone)
3258 * [`UnixDatagram::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.local_addr)
3259 * [`UnixDatagram::peer_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.peer_addr)
3260 * [`UnixDatagram::recv_from`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv_from)
3261 * [`UnixDatagram::recv`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv)
3262 * [`UnixDatagram::send_to`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send_to)
3263 * [`UnixDatagram::send`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send)
3264 * [`UnixDatagram::set_read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_read_timeout)
3265 * [`UnixDatagram::set_write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_write_timeout)
3266 * [`UnixDatagram::read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.read_timeout)
3267 * [`UnixDatagram::write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.write_timeout)
3268 * [`UnixDatagram::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_nonblocking)
3269 * [`UnixDatagram::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.take_error)
3270 * [`UnixDatagram::shutdown`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.shutdown)
3271 * RawFd impls for `UnixDatagram`
3272 * `{BTree,Hash}Map::values_mut`
3273 * [`<[_]>::binary_search_by_key`](http://doc.rust-lang.org/std/primitive.slice.html#method.binary_search_by_key)
3278 * [The `abs_sub` method of floats is deprecated](https://github.com/rust-lang/rust/pull/33664).
3279 The semantics of this minor method are subtle and probably not what
3281 * [Add implementation of Ord for Cell<T> and RefCell<T> where T: Ord](https://github.com/rust-lang/rust/pull/33306).
3282 * [On Linux, if `HashMap`s can't be initialized with `getrandom` they
3283 will fall back to `/dev/urandom` temporarily to avoid blocking
3284 during early boot](https://github.com/rust-lang/rust/pull/33086).
3285 * [Implemented negation for wrapping numerals](https://github.com/rust-lang/rust/pull/33067).
3286 * [Implement `Clone` for `binary_heap::IntoIter`](https://github.com/rust-lang/rust/pull/33050).
3287 * [Implement `Display` and `Hash` for `std::num::Wrapping`](https://github.com/rust-lang/rust/pull/33023).
3288 * [Add `Default` implementation for `&CStr`, `CString`](https://github.com/rust-lang/rust/pull/32990).
3289 * [Implement `From<Vec<T>>` and `Into<Vec<T>>` for `VecDeque<T>`](https://github.com/rust-lang/rust/pull/32866).
3290 * [Implement `Default` for `UnsafeCell`, `fmt::Error`, `Condvar`,
3291 `Mutex`, `RwLock`](https://github.com/rust-lang/rust/pull/32785).
3295 * [Cargo.toml supports the `profile.*.panic` option](https://github.com/rust-lang/cargo/pull/2687).
3296 This controls the runtime behavior of the `panic!` macro
3297 and can be either "unwind" (the default), or "abort".
3298 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
3299 * [Don't throw away errors with `-p` arguments](https://github.com/rust-lang/cargo/pull/2723).
3300 * [Report status to stderr instead of stdout](https://github.com/rust-lang/cargo/pull/2693).
3301 * [Build scripts are passed a `CARGO_MANIFEST_LINKS` environment
3302 variable that corresponds to the `links` field of the manifest](https://github.com/rust-lang/cargo/pull/2710).
3303 * [Ban keywords from crate names](https://github.com/rust-lang/cargo/pull/2707).
3304 * [Canonicalize `CARGO_HOME` on Windows](https://github.com/rust-lang/cargo/pull/2604).
3305 * [Retry network requests](https://github.com/rust-lang/cargo/pull/2396).
3306 By default they are retried twice, which can be customized with the
3307 `net.retry` value in `.cargo/config`.
3308 * [Don't print extra error info for failing subcommands](https://github.com/rust-lang/cargo/pull/2674).
3309 * [Add `--force` flag to `cargo install`](https://github.com/rust-lang/cargo/pull/2405).
3310 * [Don't use `flock` on NFS mounts](https://github.com/rust-lang/cargo/pull/2623).
3311 * [Prefer building `cargo install` artifacts in temporary directories](https://github.com/rust-lang/cargo/pull/2610).
3312 Makes it possible to install multiple crates in parallel.
3313 * [Add `cargo test --doc`](https://github.com/rust-lang/cargo/pull/2578).
3314 * [Add `cargo --explain`](https://github.com/rust-lang/cargo/pull/2551).
3315 * [Don't print warnings when `-q` is passed](https://github.com/rust-lang/cargo/pull/2576).
3316 * [Add `cargo doc --lib` and `--bin`](https://github.com/rust-lang/cargo/pull/2577).
3317 * [Don't require build script output to be UTF-8](https://github.com/rust-lang/cargo/pull/2560).
3318 * [Correctly attempt multiple git usernames](https://github.com/rust-lang/cargo/pull/2584).
3323 * [rustc memory usage was reduced by refactoring the context used for
3324 type checking](https://github.com/rust-lang/rust/pull/33425).
3325 * [Speed up creation of `HashMap`s by caching the random keys used
3326 to initialize the hash state](https://github.com/rust-lang/rust/pull/33318).
3327 * [The `find` implementation for `Chain` iterators is 2x faster](https://github.com/rust-lang/rust/pull/33289).
3328 * [Trait selection optimizations speed up type checking by 15%](https://github.com/rust-lang/rust/pull/33138).
3329 * [Efficient trie lookup for boolean Unicode properties](https://github.com/rust-lang/rust/pull/33098).
3330 10x faster than the previous lookup tables.
3331 * [Special case `#[derive(Copy, Clone)]` to avoid bloat](https://github.com/rust-lang/rust/pull/31414).
3336 * Many incremental improvements to documentation and rustdoc.
3337 * [rustdoc: List blanket trait impls](https://github.com/rust-lang/rust/pull/33514).
3338 * [rustdoc: Clean up ABI rendering](https://github.com/rust-lang/rust/pull/33151).
3339 * [Indexing with the wrong type produces a more informative error](https://github.com/rust-lang/rust/pull/33401).
3340 * [Improve diagnostics for constants being used in irrefutable patterns](https://github.com/rust-lang/rust/pull/33406).
3341 * [When many method candidates are in scope limit the suggestions to 10](https://github.com/rust-lang/rust/pull/33338).
3342 * [Remove confusing suggestion when calling a `fn` type](https://github.com/rust-lang/rust/pull/33325).
3343 * [Do not suggest changing `&mut self` to `&mut mut self`](https://github.com/rust-lang/rust/pull/33319).
3348 * [Update i686-linux-android features to match Android ABI](https://github.com/rust-lang/rust/pull/33651).
3349 * [Update aarch64-linux-android features to match Android ABI](https://github.com/rust-lang/rust/pull/33500).
3350 * [`std` no longer prints backtraces on platforms where the running
3351 module must be loaded with `env::current_exe`, which can't be relied
3352 on](https://github.com/rust-lang/rust/pull/33554).
3353 * This release includes std binaries for the i586-unknown-linux-gnu,
3354 i686-unknown-linux-musl, and armv7-linux-androideabi targets. The
3355 i586 target is for old x86 hardware without SSE2, and the armv7
3356 target is for Android running on modern ARM architectures.
3357 * [The `rust-gdb` and `rust-lldb` scripts are distributed on all
3358 Unix platforms](https://github.com/rust-lang/rust/pull/32835).
3359 * [On Unix the runtime aborts by calling `libc::abort` instead of
3360 generating an illegal instruction](https://github.com/rust-lang/rust/pull/31457).
3361 * [Rust is now bootstrapped from the previous release of Rust,
3362 instead of a snapshot from an arbitrary commit](https://github.com/rust-lang/rust/pull/32942).
3367 * [`AtomicBool` is now bool-sized, not word-sized](https://github.com/rust-lang/rust/pull/33579).
3368 * [`target_env` for Linux ARM targets is just `gnu`, not
3369 `gnueabihf`, `gnueabi`, etc](https://github.com/rust-lang/rust/pull/33403).
3370 * [Consistently panic on overflow in `Duration::new`](https://github.com/rust-lang/rust/pull/33072).
3371 * [Change `String::truncate` to panic less](https://github.com/rust-lang/rust/pull/32977).
3372 * [Add `:block` to the follow set for `:ty` and `:path`](https://github.com/rust-lang/rust/pull/32945).
3373 Affects how macros are parsed.
3374 * [Fix macro hygiene bug](https://github.com/rust-lang/rust/pull/32923).
3375 * [Feature-gated attributes on macro-generated macro invocations are
3376 now rejected](https://github.com/rust-lang/rust/pull/32791).
3377 * [Suppress fallback and ambiguity errors during type inference](https://github.com/rust-lang/rust/pull/32258).
3378 This caused some minor changes to type inference.
3381 Version 1.9.0 (2016-05-26)
3382 ==========================
3387 * The `#[deprecated]` attribute when applied to an API will generate
3388 warnings when used. The warnings may be suppressed with
3389 `#[allow(deprecated)]`. [RFC 1270].
3390 * [`fn` item types are zero sized, and each `fn` names a unique
3391 type][1.9fn]. This will break code that transmutes `fn`s, so calling
3392 `transmute` on a `fn` type will generate a warning for a few cycles,
3393 then will be converted to an error.
3394 * [Field and method resolution understand visibility, so private
3395 fields and methods cannot prevent the proper use of public fields
3396 and methods][1.9fv].
3397 * [The parser considers unicode codepoints in the
3398 `PATTERN_WHITE_SPACE` category to be whitespace][1.9ws].
3404 * [`std::panic::catch_unwind`][] (renamed from `recover`)
3405 * [`std::panic::resume_unwind`][] (renamed from `propagate`)
3406 * [`std::panic::AssertUnwindSafe`][] (renamed from `AssertRecoverSafe`)
3407 * [`std::panic::UnwindSafe`][] (renamed from `RecoverSafe`)
3408 * [`str::is_char_boundary`]
3409 * [`<*const T>::as_ref`]
3410 * [`<*mut T>::as_ref`]
3411 * [`<*mut T>::as_mut`]
3412 * [`AsciiExt::make_ascii_uppercase`]
3413 * [`AsciiExt::make_ascii_lowercase`]
3414 * [`char::decode_utf16`]
3415 * [`char::DecodeUtf16`]
3416 * [`char::DecodeUtf16Error`]
3417 * [`char::DecodeUtf16Error::unpaired_surrogate`]
3418 * [`BTreeSet::take`]
3419 * [`BTreeSet::replace`]
3422 * [`HashSet::replace`]
3424 * [`OsString::with_capacity`]
3425 * [`OsString::clear`]
3426 * [`OsString::capacity`]
3427 * [`OsString::reserve`]
3428 * [`OsString::reserve_exact`]
3429 * [`OsStr::is_empty`]
3431 * [`std::os::unix::thread`]
3434 * [`JoinHandleExt::as_pthread_t`]
3435 * [`JoinHandleExt::into_pthread_t`]
3436 * [`HashSet::hasher`]
3437 * [`HashMap::hasher`]
3438 * [`CommandExt::exec`]
3439 * [`File::try_clone`]
3440 * [`SocketAddr::set_ip`]
3441 * [`SocketAddr::set_port`]
3442 * [`SocketAddrV4::set_ip`]
3443 * [`SocketAddrV4::set_port`]
3444 * [`SocketAddrV6::set_ip`]
3445 * [`SocketAddrV6::set_port`]
3446 * [`SocketAddrV6::set_flowinfo`]
3447 * [`SocketAddrV6::set_scope_id`]
3448 * [`slice::copy_from_slice`]
3449 * [`ptr::read_volatile`]
3450 * [`ptr::write_volatile`]
3451 * [`OpenOptions::create_new`]
3452 * [`TcpStream::set_nodelay`]
3453 * [`TcpStream::nodelay`]
3454 * [`TcpStream::set_ttl`]
3455 * [`TcpStream::ttl`]
3456 * [`TcpStream::set_only_v6`]
3457 * [`TcpStream::only_v6`]
3458 * [`TcpStream::take_error`]
3459 * [`TcpStream::set_nonblocking`]
3460 * [`TcpListener::set_ttl`]
3461 * [`TcpListener::ttl`]
3462 * [`TcpListener::set_only_v6`]
3463 * [`TcpListener::only_v6`]
3464 * [`TcpListener::take_error`]
3465 * [`TcpListener::set_nonblocking`]
3466 * [`UdpSocket::set_broadcast`]
3467 * [`UdpSocket::broadcast`]
3468 * [`UdpSocket::set_multicast_loop_v4`]
3469 * [`UdpSocket::multicast_loop_v4`]
3470 * [`UdpSocket::set_multicast_ttl_v4`]
3471 * [`UdpSocket::multicast_ttl_v4`]
3472 * [`UdpSocket::set_multicast_loop_v6`]
3473 * [`UdpSocket::multicast_loop_v6`]
3474 * [`UdpSocket::set_multicast_ttl_v6`]
3475 * [`UdpSocket::multicast_ttl_v6`]
3476 * [`UdpSocket::set_ttl`]
3477 * [`UdpSocket::ttl`]
3478 * [`UdpSocket::set_only_v6`]
3479 * [`UdpSocket::only_v6`]
3480 * [`UdpSocket::join_multicast_v4`]
3481 * [`UdpSocket::join_multicast_v6`]
3482 * [`UdpSocket::leave_multicast_v4`]
3483 * [`UdpSocket::leave_multicast_v6`]
3484 * [`UdpSocket::take_error`]
3485 * [`UdpSocket::connect`]
3486 * [`UdpSocket::send`]
3487 * [`UdpSocket::recv`]
3488 * [`UdpSocket::set_nonblocking`]
3493 * [`std::sync::Once` is poisoned if its initialization function
3495 * [`cell::Ref` and `cell::RefMut` can contain unsized types][1.9cu].
3496 * [Most types implement `fmt::Debug`][1.9db].
3497 * [The default buffer size used by `BufReader` and `BufWriter` was
3498 reduced to 8K, from 64K][1.9bf]. This is in line with the buffer size
3499 used by other languages.
3500 * [`Instant`, `SystemTime` and `Duration` implement `+=` and `-=`.
3501 `Duration` additionally implements `*=` and `/=`][1.9ta].
3502 * [`Skip` is a `DoubleEndedIterator`][1.9sk].
3503 * [`From<[u8; 4]>` is implemented for `Ipv4Addr`][1.9fi].
3504 * [`Chain` implements `BufRead`][1.9ch].
3505 * [`HashMap`, `HashSet` and iterators are covariant][1.9hc].
3510 * [Cargo can now run concurrently][1.9cc].
3511 * [Top-level overrides allow specific revisions of crates to be
3512 overridden through the entire crate graph][1.9ct]. This is intended
3513 to make upgrades easier for large projects, by allowing crates to be
3514 forked temporarily until they've been upgraded and republished.
3515 * [Cargo exports a `CARGO_PKG_AUTHORS` environment variable][1.9cp].
3516 * [Cargo will pass the contents of the `RUSTFLAGS` variable to `rustc`
3517 on the commandline][1.9cf]. `rustc` arguments can also be specified
3518 in the `build.rustflags` configuration key.
3523 * [The time complexity of comparing variables for equivalence during type
3524 unification is reduced from _O_(_n_!) to _O_(_n_)][1.9tu]. This leads
3525 to major compilation time improvement in some scenarios.
3526 * [`ToString` is specialized for `str`, giving it the same performance
3527 as `to_owned`][1.9ts].
3528 * [Spawning processes with `Command::output` no longer creates extra
3530 * [`#[derive(PartialEq)]` and `#[derive(PartialOrd)]` emit less code
3531 for C-like enums][1.9cl].
3536 * [Passing the `--quiet` flag to a test runner will produce
3537 much-abbreviated output][1.9q].
3538 * The Rust Project now publishes std binaries for the
3539 `mips-unknown-linux-musl`, `mipsel-unknown-linux-musl`, and
3540 `i586-pc-windows-msvc` targets.
3545 * [`std::sync::Once` is poisoned if its initialization function
3547 * [It is illegal to define methods with the same name in overlapping
3548 inherent `impl` blocks][1.9sn].
3549 * [`fn` item types are zero sized, and each `fn` names a unique
3550 type][1.9fn]. This will break code that transmutes `fn`s, so calling
3551 `transmute` on a `fn` type will generate a warning for a few cycles,
3552 then will be converted to an error.
3553 * [Improvements to const evaluation may trigger new errors when integer
3554 literals are out of range][1.9ce].
3557 [1.9bf]: https://github.com/rust-lang/rust/pull/32695
3558 [1.9cc]: https://github.com/rust-lang/cargo/pull/2486
3559 [1.9ce]: https://github.com/rust-lang/rust/pull/30587
3560 [1.9cf]: https://github.com/rust-lang/cargo/pull/2241
3561 [1.9ch]: https://github.com/rust-lang/rust/pull/32541
3562 [1.9cl]: https://github.com/rust-lang/rust/pull/31977
3563 [1.9cp]: https://github.com/rust-lang/cargo/pull/2465
3564 [1.9ct]: https://github.com/rust-lang/cargo/pull/2385
3565 [1.9cu]: https://github.com/rust-lang/rust/pull/32652
3566 [1.9db]: https://github.com/rust-lang/rust/pull/32054
3567 [1.9fi]: https://github.com/rust-lang/rust/pull/32050
3568 [1.9fn]: https://github.com/rust-lang/rust/pull/31710
3569 [1.9fv]: https://github.com/rust-lang/rust/pull/31938
3570 [1.9hc]: https://github.com/rust-lang/rust/pull/32635
3571 [1.9o]: https://github.com/rust-lang/rust/pull/32325
3572 [1.9q]: https://github.com/rust-lang/rust/pull/31887
3573 [1.9sk]: https://github.com/rust-lang/rust/pull/31700
3574 [1.9sn]: https://github.com/rust-lang/rust/pull/31925
3575 [1.9sp]: https://github.com/rust-lang/rust/pull/31618
3576 [1.9ta]: https://github.com/rust-lang/rust/pull/32448
3577 [1.9ts]: https://github.com/rust-lang/rust/pull/32586
3578 [1.9tu]: https://github.com/rust-lang/rust/pull/32062
3579 [1.9ws]: https://github.com/rust-lang/rust/pull/29734
3580 [RFC 1270]: https://github.com/rust-lang/rfcs/blob/master/text/1270-deprecation.md
3581 [`<*const T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
3582 [`<*mut T>::as_mut`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_mut
3583 [`<*mut T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
3584 [`slice::copy_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.copy_from_slice
3585 [`AsciiExt::make_ascii_lowercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_lowercase
3586 [`AsciiExt::make_ascii_uppercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_uppercase
3587 [`BTreeSet::get`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.get
3588 [`BTreeSet::replace`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.replace
3589 [`BTreeSet::take`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.take
3590 [`CommandExt::exec`]: http://doc.rust-lang.org/nightly/std/os/unix/process/trait.CommandExt.html#tymethod.exec
3591 [`File::try_clone`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html#method.try_clone
3592 [`HashMap::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.hasher
3593 [`HashSet::get`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.get
3594 [`HashSet::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.hasher
3595 [`HashSet::replace`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.replace
3596 [`HashSet::take`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.take
3597 [`JoinHandleExt::as_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.as_pthread_t
3598 [`JoinHandleExt::into_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.into_pthread_t
3599 [`JoinHandleExt`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html
3600 [`OpenOptions::create_new`]: http://doc.rust-lang.org/nightly/std/fs/struct.OpenOptions.html#method.create_new
3601 [`OsStr::is_empty`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.is_empty
3602 [`OsStr::len`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.len
3603 [`OsString::capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.capacity
3604 [`OsString::clear`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.clear
3605 [`OsString::reserve_exact`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve_exact
3606 [`OsString::reserve`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve
3607 [`OsString::with_capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.with_capacity
3608 [`RawPthread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/type.RawPthread.html
3609 [`SocketAddr::set_ip`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_ip
3610 [`SocketAddr::set_port`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_port
3611 [`SocketAddrV4::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_ip
3612 [`SocketAddrV4::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_port
3613 [`SocketAddrV6::set_flowinfo`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_flowinfo
3614 [`SocketAddrV6::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_ip
3615 [`SocketAddrV6::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_port
3616 [`SocketAddrV6::set_scope_id`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_scope_id
3617 [`TcpListener::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
3618 [`TcpListener::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
3619 [`TcpListener::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
3620 [`TcpListener::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
3621 [`TcpListener::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
3622 [`TcpListener::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
3623 [`TcpStream::nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.nodelay
3624 [`TcpStream::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
3625 [`TcpStream::set_nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nodelay
3626 [`TcpStream::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
3627 [`TcpStream::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
3628 [`TcpStream::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
3629 [`TcpStream::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
3630 [`TcpStream::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
3631 [`UdpSocket::broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.broadcast
3632 [`UdpSocket::connect`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.connect
3633 [`UdpSocket::join_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v4
3634 [`UdpSocket::join_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v6
3635 [`UdpSocket::leave_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v4
3636 [`UdpSocket::leave_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v6
3637 [`UdpSocket::multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v4
3638 [`UdpSocket::multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v6
3639 [`UdpSocket::multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v4
3640 [`UdpSocket::multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v6
3641 [`UdpSocket::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.only_v6
3642 [`UdpSocket::recv`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.recv
3643 [`UdpSocket::send`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.send
3644 [`UdpSocket::set_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_broadcast
3645 [`UdpSocket::set_multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v4
3646 [`UdpSocket::set_multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v6
3647 [`UdpSocket::set_multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v4
3648 [`UdpSocket::set_multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v6
3649 [`UdpSocket::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_nonblocking
3650 [`UdpSocket::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_only_v6
3651 [`UdpSocket::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_ttl
3652 [`UdpSocket::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.take_error
3653 [`UdpSocket::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.ttl
3654 [`char::DecodeUtf16Error::unpaired_surrogate`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html#method.unpaired_surrogate
3655 [`char::DecodeUtf16Error`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html
3656 [`char::DecodeUtf16`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16.html
3657 [`char::decode_utf16`]: http://doc.rust-lang.org/nightly/std/char/fn.decode_utf16.html
3658 [`ptr::read_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.read_volatile.html
3659 [`ptr::write_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.write_volatile.html
3660 [`std::os::unix::thread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/index.html
3661 [`std::panic::AssertUnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/struct.AssertUnwindSafe.html
3662 [`std::panic::UnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/trait.UnwindSafe.html
3663 [`std::panic::catch_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.catch_unwind.html
3664 [`std::panic::resume_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.resume_unwind.html
3665 [`std::panic`]: http://doc.rust-lang.org/nightly/std/panic/index.html
3666 [`str::is_char_boundary`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.is_char_boundary
3669 Version 1.8.0 (2016-04-14)
3670 ==========================
3675 * Rust supports overloading of compound assignment statements like
3676 `+=` by implementing the [`AddAssign`], [`SubAssign`],
3677 [`MulAssign`], [`DivAssign`], [`RemAssign`], [`BitAndAssign`],
3678 [`BitOrAssign`], [`BitXorAssign`], [`ShlAssign`], or [`ShrAssign`]
3680 * Empty structs can be defined with braces, as in `struct Foo { }`, in
3681 addition to the non-braced form, `struct Foo;`. [RFC 218].
3687 * [`str::encode_utf16`][] (renamed from `utf16_units`)
3688 * [`str::EncodeUtf16`][] (renamed from `Utf16Units`)
3691 * [`ptr::drop_in_place`]
3693 * [`time::SystemTime`]
3695 * [`Instant::duration_since`][] (renamed from `duration_from_earlier`)
3696 * [`Instant::elapsed`]
3697 * [`SystemTime::now`]
3698 * [`SystemTime::duration_since`][] (renamed from `duration_from_earlier`)
3699 * [`SystemTime::elapsed`]
3700 * Various `Add`/`Sub` impls for `Time` and `SystemTime`
3701 * [`SystemTimeError`]
3702 * [`SystemTimeError::duration`]
3703 * Various impls for `SystemTimeError`
3705 * [`AddAssign`], [`SubAssign`], [`MulAssign`], [`DivAssign`],
3706 [`RemAssign`], [`BitAndAssign`], [`BitOrAssign`],
3707 [`BitXorAssign`], [`ShlAssign`], [`ShrAssign`].
3708 * [The `write!` and `writeln!` macros correctly emit errors if any of
3709 their arguments can't be formatted][1.8w].
3710 * [Various I/O functions support large files on 32-bit Linux][1.8l].
3711 * [The Unix-specific `raw` modules, which contain a number of
3712 redefined C types are deprecated][1.8r], including `os::raw::unix`,
3713 `os::raw::macos`, and `os::raw::linux`. These modules defined types
3714 such as `ino_t` and `dev_t`. The inconsistency of these definitions
3715 across platforms was making it difficult to implement `std`
3716 correctly. Those that need these definitions should use the `libc`
3718 * The Unix-specific `MetadataExt` traits, including
3719 `os::unix::fs::MetadataExt`, which expose values such as inode
3720 numbers [no longer return platform-specific types][1.8r], but
3721 instead return widened integers. [RFC 1415].
3722 * [`btree_set::{IntoIter, Iter, Range}` are covariant][1.8cv].
3723 * [Atomic loads and stores are not volatile][1.8a].
3724 * [All types in `sync::mpsc` implement `fmt::Debug`][1.8mp].
3729 * [Inlining hash functions lead to a 3% compile-time improvement in
3730 some workloads][1.8h].
3731 * When using jemalloc, its symbols are [unprefixed so that it
3732 overrides the libc malloc implementation][1.8h]. This means that for
3733 rustc, LLVM is now using jemalloc, which results in a 6%
3734 compile-time improvement on a specific workload.
3735 * [Avoid quadratic growth in function size due to cleanups][1.8cu].
3740 * [32-bit MSVC builds finally implement unwinding][1.8ms].
3741 i686-pc-windows-msvc is now considered a tier-1 platform.
3742 * [The `--print targets` flag prints a list of supported targets][1.8t].
3743 * [The `--print cfg` flag prints the `cfg`s defined for the current
3745 * [`rustc` can be built with an new Cargo-based build system, written
3746 in Rust][1.8b]. It will eventually replace Rust's Makefile-based
3747 build system. To enable it configure with `configure --rustbuild`.
3748 * [Errors for non-exhaustive `match` patterns now list up to 3 missing
3749 variants while also indicating the total number of missing variants
3750 if more than 3][1.8m].
3751 * [Executable stacks are disabled on Linux and BSD][1.8nx].
3752 * The Rust Project now publishes binary releases of the standard
3753 library for a number of tier-2 targets:
3754 `armv7-unknown-linux-gnueabihf`, `powerpc-unknown-linux-gnu`,
3755 `powerpc64-unknown-linux-gnu`, `powerpc64le-unknown-linux-gnu`
3756 `x86_64-rumprun-netbsd`. These can be installed with
3757 tools such as [multirust][1.8mr].
3762 * [`cargo init` creates a new Cargo project in the current
3763 directory][1.8ci]. It is otherwise like `cargo new`.
3764 * [Cargo has configuration keys for `-v` and
3765 `--color`][1.8cc]. `verbose` and `color`, respectively, go in the
3766 `[term]` section of `.cargo/config`.
3767 * [Configuration keys that evaluate to strings or integers can be set
3768 via environment variables][1.8ce]. For example the `build.jobs` key
3769 can be set via `CARGO_BUILD_JOBS`. Environment variables take
3770 precedence over config files.
3771 * [Target-specific dependencies support Rust `cfg` syntax for
3772 describing targets][1.8cfg] so that dependencies for multiple
3773 targets can be specified together. [RFC 1361].
3774 * [The environment variables `CARGO_TARGET_ROOT`, `RUSTC`, and
3775 `RUSTDOC` take precedence over the `build.target-dir`,
3776 `build.rustc`, and `build.rustdoc` configuration values][1.8cv].
3777 * [The child process tree is killed on Windows when Cargo is
3779 * [The `build.target` configuration value sets the target platform,
3780 like `--target`][1.8ct].
3785 * [Unstable compiler flags have been further restricted][1.8u]. Since
3786 1.0 `-Z` flags have been considered unstable, and other flags that
3787 were considered unstable additionally required passing `-Z
3788 unstable-options` to access. Unlike unstable language and library
3789 features though, these options have been accessible on the stable
3790 release channel. Going forward, *new unstable flags will not be
3791 available on the stable release channel*, and old unstable flags
3792 will warn about their usage. In the future, all unstable flags will
3793 be unavailable on the stable release channel.
3794 * [It is no longer possible to `match` on empty enum variants using
3795 the `Variant(..)` syntax][1.8v]. This has been a warning since 1.6.
3796 * The Unix-specific `MetadataExt` traits, including
3797 `os::unix::fs::MetadataExt`, which expose values such as inode
3798 numbers [no longer return platform-specific types][1.8r], but
3799 instead return widened integers. [RFC 1415].
3800 * [Modules sourced from the filesystem cannot appear within arbitrary
3801 blocks, but only within other modules][1.8mf].
3802 * [`--cfg` compiler flags are parsed strictly as identifiers][1.8c].
3803 * On Unix, [stack overflow triggers a runtime abort instead of a
3805 * [`Command::spawn` and its equivalents return an error if any of
3806 its command-line arguments contain interior `NUL`s][1.8n].
3807 * [Tuple and unit enum variants from other crates are in the type
3809 * [On Windows `rustc` emits `.lib` files for the `staticlib` library
3810 type instead of `.a` files][1.8st]. Additionally, for the MSVC
3811 toolchain, `rustc` emits import libraries named `foo.dll.lib`
3812 instead of `foo.lib`.
3815 [1.8a]: https://github.com/rust-lang/rust/pull/30962
3816 [1.8b]: https://github.com/rust-lang/rust/pull/31123
3817 [1.8c]: https://github.com/rust-lang/rust/pull/31530
3818 [1.8cc]: https://github.com/rust-lang/cargo/pull/2397
3819 [1.8ce]: https://github.com/rust-lang/cargo/pull/2398
3820 [1.8cf]: https://github.com/rust-lang/rust/pull/31278
3821 [1.8cfg]: https://github.com/rust-lang/cargo/pull/2328
3822 [1.8ci]: https://github.com/rust-lang/cargo/pull/2081
3823 [1.8ck]: https://github.com/rust-lang/cargo/pull/2370
3824 [1.8ct]: https://github.com/rust-lang/cargo/pull/2335
3825 [1.8cu]: https://github.com/rust-lang/rust/pull/31390
3826 [1.8cv]: https://github.com/rust-lang/cargo/issues/2365
3827 [1.8cv]: https://github.com/rust-lang/rust/pull/30998
3828 [1.8h]: https://github.com/rust-lang/rust/pull/31460
3829 [1.8l]: https://github.com/rust-lang/rust/pull/31668
3830 [1.8m]: https://github.com/rust-lang/rust/pull/31020
3831 [1.8mf]: https://github.com/rust-lang/rust/pull/31534
3832 [1.8mp]: https://github.com/rust-lang/rust/pull/30894
3833 [1.8mr]: https://users.rust-lang.org/t/multirust-0-8-with-cross-std-installation/4901
3834 [1.8ms]: https://github.com/rust-lang/rust/pull/30448
3835 [1.8n]: https://github.com/rust-lang/rust/pull/31056
3836 [1.8nx]: https://github.com/rust-lang/rust/pull/30859
3837 [1.8r]: https://github.com/rust-lang/rust/pull/31551
3838 [1.8so]: https://github.com/rust-lang/rust/pull/31333
3839 [1.8st]: https://github.com/rust-lang/rust/pull/29520
3840 [1.8t]: https://github.com/rust-lang/rust/pull/31358
3841 [1.8tn]: https://github.com/rust-lang/rust/pull/30882
3842 [1.8u]: https://github.com/rust-lang/rust/pull/31793
3843 [1.8v]: https://github.com/rust-lang/rust/pull/31757
3844 [1.8w]: https://github.com/rust-lang/rust/pull/31904
3845 [RFC 1361]: https://github.com/rust-lang/rfcs/blob/master/text/1361-cargo-cfg-dependencies.md
3846 [RFC 1415]: https://github.com/rust-lang/rfcs/blob/master/text/1415-trim-std-os.md
3847 [RFC 218]: https://github.com/rust-lang/rfcs/blob/master/text/0218-empty-struct-with-braces.md
3848 [RFC 953]: https://github.com/rust-lang/rfcs/blob/master/text/0953-op-assign.md
3849 [`AddAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.AddAssign.html
3850 [`BitAndAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitAndAssign.html
3851 [`BitOrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitOrAssign.html
3852 [`BitXorAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitXorAssign.html
3853 [`DivAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.DivAssign.html
3854 [`Instant::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.duration_since
3855 [`Instant::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.elapsed
3856 [`Instant::now`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.now
3857 [`MulAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.MulAssign.html
3858 [`Ref::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.Ref.html#method.map
3859 [`RefMut::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.RefMut.html#method.map
3860 [`RemAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.RemAssign.html
3861 [`ShlAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShlAssign.html
3862 [`ShrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShrAssign.html
3863 [`SubAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.SubAssign.html
3864 [`SystemTime::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.duration_since
3865 [`SystemTime::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.elapsed
3866 [`SystemTime::now`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.now
3867 [`SystemTimeError::duration`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html#method.duration
3868 [`SystemTimeError`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html
3869 [`UNIX_EPOCH`]: http://doc.rust-lang.org/nightly/std/time/constant.UNIX_EPOCH.html
3870 [`ptr::drop_in_place`]: http://doc.rust-lang.org/nightly/std/ptr/fn.drop_in_place.html
3871 [`str::EncodeUtf16`]: http://doc.rust-lang.org/nightly/std/str/struct.EncodeUtf16.html
3872 [`str::encode_utf16`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.encode_utf16
3873 [`time::Instant`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html
3874 [`time::SystemTime`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html
3877 Version 1.7.0 (2016-03-03)
3878 ==========================
3885 * [`Path::strip_prefix`][] (renamed from relative_from)
3886 * [`path::StripPrefixError`][] (new error type returned from strip_prefix)
3888 * [`Ipv4Addr::is_loopback`]
3889 * [`Ipv4Addr::is_private`]
3890 * [`Ipv4Addr::is_link_local`]
3891 * [`Ipv4Addr::is_multicast`]
3892 * [`Ipv4Addr::is_broadcast`]
3893 * [`Ipv4Addr::is_documentation`]
3895 * [`Ipv6Addr::is_unspecified`]
3896 * [`Ipv6Addr::is_loopback`]
3897 * [`Ipv6Addr::is_multicast`]
3900 * [`Vec::as_mut_slice`]
3902 * [`String::as_str`]
3903 * [`String::as_mut_str`]
3905 * `<[T]>::`[`clone_from_slice`], which now requires the two slices to
3907 * `<[T]>::`[`sort_by_key`]
3908 * checked, saturated, and overflowing operations
3909 * [`i32::checked_rem`], [`i32::checked_neg`], [`i32::checked_shl`], [`i32::checked_shr`]
3910 * [`i32::saturating_mul`]
3911 * [`i32::overflowing_add`], [`i32::overflowing_sub`], [`i32::overflowing_mul`], [`i32::overflowing_div`]
3912 * [`i32::overflowing_rem`], [`i32::overflowing_neg`], [`i32::overflowing_shl`], [`i32::overflowing_shr`]
3913 * [`u32::checked_rem`], [`u32::checked_neg`], [`u32::checked_shl`], [`u32::checked_shl`]
3914 * [`u32::saturating_mul`]
3915 * [`u32::overflowing_add`], [`u32::overflowing_sub`], [`u32::overflowing_mul`], [`u32::overflowing_div`]
3916 * [`u32::overflowing_rem`], [`u32::overflowing_neg`], [`u32::overflowing_shl`], [`u32::overflowing_shr`]
3917 * and checked, saturated, and overflowing operations for other primitive types
3919 * [`ffi::IntoStringError`]
3920 * [`CString::into_string`]
3921 * [`CString::into_bytes`]
3922 * [`CString::into_bytes_with_nul`]
3923 * `From<CString> for Vec<u8>`
3925 * [`IntoStringError::into_cstring`]
3926 * [`IntoStringError::utf8_error`]
3927 * `Error for IntoStringError`
3929 * [`std::hash::BuildHasher`]
3930 * [`BuildHasher::Hasher`]
3931 * [`BuildHasher::build_hasher`]
3932 * [`std::hash::BuildHasherDefault`]
3933 * [`HashMap::with_hasher`]
3934 * [`HashMap::with_capacity_and_hasher`]
3935 * [`HashSet::with_hasher`]
3936 * [`HashSet::with_capacity_and_hasher`]
3937 * [`std::collections::hash_map::RandomState`]
3938 * [`RandomState::new`]
3939 * [Validating UTF-8 is faster by a factor of between 7 and 14x for
3940 ASCII input][1.7utf8]. This means that creating `String`s and `str`s
3941 from bytes is faster.
3942 * [The performance of `LineWriter` (and thus `io::stdout`) was
3943 improved by using `memchr` to search for newlines][1.7m].
3944 * [`f32::to_degrees` and `f32::to_radians` are stable][1.7f]. The
3945 `f64` variants were stabilized previously.
3946 * [`BTreeMap` was rewritten to use less memory and improve the performance
3947 of insertion and iteration, the latter by as much as 5x][1.7bm].
3948 * [`BTreeSet` and its iterators, `Iter`, `IntoIter`, and `Range` are
3949 covariant over their contained type][1.7bt].
3950 * [`LinkedList` and its iterators, `Iter` and `IntoIter` are covariant
3951 over their contained type][1.7ll].
3952 * [`str::replace` now accepts a `Pattern`][1.7rp], like other string
3954 * [`Any` is implemented for unsized types][1.7a].
3955 * [`Hash` is implemented for `Duration`][1.7h].
3960 * [When running tests with `--test`, rustdoc will pass `--cfg`
3961 arguments to the compiler][1.7dt].
3962 * [The compiler is built with RPATH information by default][1.7rpa].
3963 This means that it will be possible to run `rustc` when installed in
3964 unusual configurations without configuring the dynamic linker search
3966 * [`rustc` passes `--enable-new-dtags` to GNU ld][1.7dta]. This makes
3967 any RPATH entries (emitted with `-C rpath`) *not* take precedence
3968 over `LD_LIBRARY_PATH`.
3973 * [`cargo rustc` accepts a `--profile` flag that runs `rustc` under
3974 any of the compilation profiles, 'dev', 'bench', or 'test'][1.7cp].
3975 * [The `rerun-if-changed` build script directive no longer causes the
3976 build script to incorrectly run twice in certain scenarios][1.7rr].
3981 * Soundness fixes to the interactions between associated types and
3982 lifetimes, specified in [RFC 1214], [now generate errors][1.7sf] for
3983 code that violates the new rules. This is a significant change that
3984 is known to break existing code, so it has emitted warnings for the
3985 new error cases since 1.4 to give crate authors time to adapt. The
3986 details of what is changing are subtle; read the RFC for more.
3987 * [Several bugs in the compiler's visibility calculations were
3988 fixed][1.7v]. Since this was found to break significant amounts of
3989 code, the new errors will be emitted as warnings for several release
3990 cycles, under the `private_in_public` lint.
3991 * Defaulted type parameters were accidentally accepted in positions
3992 that were not intended. In this release, [defaulted type parameters
3993 appearing outside of type definitions will generate a
3994 warning][1.7d], which will become an error in future releases.
3995 * [Parsing "." as a float results in an error instead of 0][1.7p].
3996 That is, `".".parse::<f32>()` returns `Err`, not `Ok(0.0)`.
3997 * [Borrows of closure parameters may not outlive the closure][1.7bc].
3999 [1.7a]: https://github.com/rust-lang/rust/pull/30928
4000 [1.7bc]: https://github.com/rust-lang/rust/pull/30341
4001 [1.7bm]: https://github.com/rust-lang/rust/pull/30426
4002 [1.7bt]: https://github.com/rust-lang/rust/pull/30998
4003 [1.7cp]: https://github.com/rust-lang/cargo/pull/2224
4004 [1.7d]: https://github.com/rust-lang/rust/pull/30724
4005 [1.7dt]: https://github.com/rust-lang/rust/pull/30372
4006 [1.7dta]: https://github.com/rust-lang/rust/pull/30394
4007 [1.7f]: https://github.com/rust-lang/rust/pull/30672
4008 [1.7h]: https://github.com/rust-lang/rust/pull/30818
4009 [1.7ll]: https://github.com/rust-lang/rust/pull/30663
4010 [1.7m]: https://github.com/rust-lang/rust/pull/30381
4011 [1.7p]: https://github.com/rust-lang/rust/pull/30681
4012 [1.7rp]: https://github.com/rust-lang/rust/pull/29498
4013 [1.7rpa]: https://github.com/rust-lang/rust/pull/30353
4014 [1.7rr]: https://github.com/rust-lang/cargo/pull/2279
4015 [1.7sf]: https://github.com/rust-lang/rust/pull/30389
4016 [1.7utf8]: https://github.com/rust-lang/rust/pull/30740
4017 [1.7v]: https://github.com/rust-lang/rust/pull/29973
4018 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
4019 [`BuildHasher::Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
4020 [`BuildHasher::build_hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html#tymethod.build_hasher
4021 [`CString::into_bytes_with_nul`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes_with_nul
4022 [`CString::into_bytes`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes
4023 [`CString::into_string`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_string
4024 [`HashMap::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_capacity_and_hasher
4025 [`HashMap::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_hasher
4026 [`HashSet::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_capacity_and_hasher
4027 [`HashSet::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_hasher
4028 [`IntoStringError::into_cstring`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.into_cstring
4029 [`IntoStringError::utf8_error`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.utf8_error
4030 [`Ipv4Addr::is_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_broadcast
4031 [`Ipv4Addr::is_documentation`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_documentation
4032 [`Ipv4Addr::is_link_local`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_link_local
4033 [`Ipv4Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_loopback
4034 [`Ipv4Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_multicast
4035 [`Ipv4Addr::is_private`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_private
4036 [`Ipv6Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_loopback
4037 [`Ipv6Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_multicast
4038 [`Ipv6Addr::is_unspecified`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_unspecified
4039 [`Path::strip_prefix`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.strip_prefix
4040 [`RandomState::new`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html#method.new
4041 [`String::as_mut_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_mut_str
4042 [`String::as_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_str
4043 [`Vec::as_mut_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_mut_slice
4044 [`Vec::as_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_slice
4045 [`clone_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.clone_from_slice
4046 [`ffi::IntoStringError`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html
4047 [`i32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_neg
4048 [`i32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_rem
4049 [`i32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shl
4050 [`i32::checked_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shr
4051 [`i32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_add
4052 [`i32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_div
4053 [`i32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_mul
4054 [`i32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_neg
4055 [`i32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_rem
4056 [`i32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shl
4057 [`i32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shr
4058 [`i32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_sub
4059 [`i32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.saturating_mul
4060 [`path::StripPrefixError`]: http://doc.rust-lang.org/nightly/std/path/struct.StripPrefixError.html
4061 [`sort_by_key`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.sort_by_key
4062 [`std::collections::hash_map::RandomState`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html
4063 [`std::hash::BuildHasherDefault`]: http://doc.rust-lang.org/nightly/std/hash/struct.BuildHasherDefault.html
4064 [`std::hash::BuildHasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html
4065 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
4066 [`u32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_rem
4067 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
4068 [`u32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_shl
4069 [`u32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_add
4070 [`u32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_div
4071 [`u32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_mul
4072 [`u32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_neg
4073 [`u32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_rem
4074 [`u32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shl
4075 [`u32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shr
4076 [`u32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_sub
4077 [`u32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.saturating_mul
4080 Version 1.6.0 (2016-01-21)
4081 ==========================
4086 * The `#![no_std]` attribute causes a crate to not be linked to the
4087 standard library, but only the [core library][1.6co], as described
4088 in [RFC 1184]. The core library defines common types and traits but
4089 has no platform dependencies whatsoever, and is the basis for Rust
4090 software in environments that cannot support a full port of the
4091 standard library, such as operating systems. Most of the core
4092 library is now stable.
4098 [`Read::read_exact`],
4099 [`ErrorKind::UnexpectedEof`][] (renamed from `UnexpectedEOF`),
4100 [`fs::DirBuilder`], [`fs::DirBuilder::new`],
4101 [`fs::DirBuilder::recursive`], [`fs::DirBuilder::create`],
4102 [`os::unix::fs::DirBuilderExt`],
4103 [`os::unix::fs::DirBuilderExt::mode`], [`vec::Drain`],
4104 [`vec::Vec::drain`], [`string::Drain`], [`string::String::drain`],
4105 [`vec_deque::Drain`], [`vec_deque::VecDeque::drain`],
4106 [`collections::hash_map::Drain`],
4107 [`collections::hash_map::HashMap::drain`],
4108 [`collections::hash_set::Drain`],
4109 [`collections::hash_set::HashSet::drain`],
4110 [`collections::binary_heap::Drain`],
4111 [`collections::binary_heap::BinaryHeap::drain`],
4112 [`Vec::extend_from_slice`][] (renamed from `push_all`),
4113 [`Mutex::get_mut`], [`Mutex::into_inner`], [`RwLock::get_mut`],
4114 [`RwLock::into_inner`],
4115 [`Iterator::min_by_key`][] (renamed from `min_by`),
4116 [`Iterator::max_by_key`][] (renamed from `max_by`).
4117 * The [core library][1.6co] is stable, as are most of its APIs.
4118 * [The `assert_eq!` macro supports arguments that don't implement
4119 `Sized`][1.6ae], such as arrays. In this way it behaves more like
4121 * Several timer functions that take duration in milliseconds [are
4122 deprecated in favor of those that take `Duration`][1.6ms]. These
4123 include `Condvar::wait_timeout_ms`, `thread::sleep_ms`, and
4124 `thread::park_timeout_ms`.
4125 * The algorithm by which `Vec` reserves additional elements was
4126 [tweaked to not allocate excessive space][1.6a] while still growing
4128 * `From` conversions are [implemented from integers to floats][1.6f]
4129 in cases where the conversion is lossless. Thus they are not
4130 implemented for 32-bit ints to `f32`, nor for 64-bit ints to `f32`
4131 or `f64`. They are also not implemented for `isize` and `usize`
4132 because the implementations would be platform-specific. `From` is
4133 also implemented from `f32` to `f64`.
4134 * `From<&Path>` and `From<PathBuf>` are implemented for `Cow<Path>`.
4135 * `From<T>` is implemented for `Box<T>`, `Rc<T>` and `Arc<T>`.
4136 * `IntoIterator` is implemented for `&PathBuf` and `&Path`.
4137 * [`BinaryHeap` was refactored][1.6bh] for modest performance
4139 * Sorting slices that are already sorted [is 50% faster in some
4145 * Cargo will look in `$CARGO_HOME/bin` for subcommands [by default][1.6c].
4146 * Cargo build scripts can specify their dependencies by emitting the
4147 [`rerun-if-changed`][1.6rr] key.
4148 * crates.io will reject publication of crates with dependencies that
4149 have a wildcard version constraint. Crates with wildcard
4150 dependencies were seen to cause a variety of problems, as described
4151 in [RFC 1241]. Since 1.5 publication of such crates has emitted a
4153 * `cargo clean` [accepts a `--release` flag][1.6cc] to clean the
4154 release folder. A variety of artifacts that Cargo failed to clean
4155 are now correctly deleted.
4160 * The `unreachable_code` lint [warns when a function call's argument
4162 * The parser indicates [failures that may be caused by
4163 confusingly-similar Unicode characters][1.6uc]
4164 * Certain macro errors [are reported at definition time][1.6m], not
4170 * The compiler no longer makes use of the [`RUST_PATH`][1.6rp]
4171 environment variable when locating crates. This was a pre-cargo
4172 feature for integrating with the package manager that was
4173 accidentally never removed.
4174 * [A number of bugs were fixed in the privacy checker][1.6p] that
4175 could cause previously-accepted code to break.
4176 * [Modules and unit/tuple structs may not share the same name][1.6ts].
4177 * [Bugs in pattern matching unit structs were fixed][1.6us]. The tuple
4178 struct pattern syntax (`Foo(..)`) can no longer be used to match
4179 unit structs. This is a warning now, but will become an error in
4180 future releases. Patterns that share the same name as a const are
4182 * A bug was fixed that causes [rustc not to apply default type
4183 parameters][1.6xc] when resolving certain method implementations of
4184 traits defined in other crates.
4186 [1.6a]: https://github.com/rust-lang/rust/pull/29454
4187 [1.6ae]: https://github.com/rust-lang/rust/pull/29770
4188 [1.6bh]: https://github.com/rust-lang/rust/pull/29811
4189 [1.6c]: https://github.com/rust-lang/cargo/pull/2192
4190 [1.6cc]: https://github.com/rust-lang/cargo/pull/2131
4191 [1.6co]: http://doc.rust-lang.org/core/index.html
4192 [1.6dv]: https://github.com/rust-lang/rust/pull/30000
4193 [1.6f]: https://github.com/rust-lang/rust/pull/29129
4194 [1.6m]: https://github.com/rust-lang/rust/pull/29828
4195 [1.6ms]: https://github.com/rust-lang/rust/pull/29604
4196 [1.6p]: https://github.com/rust-lang/rust/pull/29726
4197 [1.6rp]: https://github.com/rust-lang/rust/pull/30034
4198 [1.6rr]: https://github.com/rust-lang/cargo/pull/2134
4199 [1.6s]: https://github.com/rust-lang/rust/pull/29675
4200 [1.6ts]: https://github.com/rust-lang/rust/issues/21546
4201 [1.6uc]: https://github.com/rust-lang/rust/pull/29837
4202 [1.6us]: https://github.com/rust-lang/rust/pull/29383
4203 [1.6xc]: https://github.com/rust-lang/rust/issues/30123
4204 [RFC 1184]: https://github.com/rust-lang/rfcs/blob/master/text/1184-stabilize-no_std.md
4205 [RFC 1241]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
4206 [`ErrorKind::UnexpectedEof`]: http://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html#variant.UnexpectedEof
4207 [`Iterator::max_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.max_by_key
4208 [`Iterator::min_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.min_by_key
4209 [`Mutex::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.get_mut
4210 [`Mutex::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.into_inner
4211 [`Read::read_exact`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_exact
4212 [`RwLock::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.get_mut
4213 [`RwLock::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.into_inner
4214 [`Vec::extend_from_slice`]: http://doc.rust-lang.org/nightly/collections/vec/struct.Vec.html#method.extend_from_slice
4215 [`collections::binary_heap::BinaryHeap::drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.BinaryHeap.html#method.drain
4216 [`collections::binary_heap::Drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.Drain.html
4217 [`collections::hash_map::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.Drain.html
4218 [`collections::hash_map::HashMap::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.HashMap.html#method.drain
4219 [`collections::hash_set::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.Drain.html
4220 [`collections::hash_set::HashSet::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.HashSet.html#method.drain
4221 [`fs::DirBuilder::create`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.create
4222 [`fs::DirBuilder::new`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.new
4223 [`fs::DirBuilder::recursive`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.recursive
4224 [`fs::DirBuilder`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html
4225 [`os::unix::fs::DirBuilderExt::mode`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html#tymethod.mode
4226 [`os::unix::fs::DirBuilderExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html
4227 [`string::Drain`]: http://doc.rust-lang.org/nightly/std/string/struct.Drain.html
4228 [`string::String::drain`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.drain
4229 [`vec::Drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Drain.html
4230 [`vec::Vec::drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.drain
4231 [`vec_deque::Drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.Drain.html
4232 [`vec_deque::VecDeque::drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.VecDeque.html#method.drain
4235 Version 1.5.0 (2015-12-10)
4236 ==========================
4238 * ~700 changes, numerous bugfixes
4244 [`BinaryHeap::from`], [`BinaryHeap::into_sorted_vec`],
4245 [`BinaryHeap::into_vec`], [`Condvar::wait_timeout`],
4246 [`FileTypeExt::is_block_device`], [`FileTypeExt::is_char_device`],
4247 [`FileTypeExt::is_fifo`], [`FileTypeExt::is_socket`],
4248 [`FileTypeExt`], [`Formatter::alternate`], [`Formatter::fill`],
4249 [`Formatter::precision`], [`Formatter::sign_aware_zero_pad`],
4250 [`Formatter::sign_minus`], [`Formatter::sign_plus`],
4251 [`Formatter::width`], [`Iterator::cmp`], [`Iterator::eq`],
4252 [`Iterator::ge`], [`Iterator::gt`], [`Iterator::le`],
4253 [`Iterator::lt`], [`Iterator::ne`], [`Iterator::partial_cmp`],
4254 [`Path::canonicalize`], [`Path::exists`], [`Path::is_dir`],
4255 [`Path::is_file`], [`Path::metadata`], [`Path::read_dir`],
4256 [`Path::read_link`], [`Path::symlink_metadata`],
4257 [`Utf8Error::valid_up_to`], [`Vec::resize`],
4258 [`VecDeque::as_mut_slices`], [`VecDeque::as_slices`],
4259 [`VecDeque::insert`], [`VecDeque::shrink_to_fit`],
4260 [`VecDeque::swap_remove_back`], [`VecDeque::swap_remove_front`],
4261 [`slice::split_first_mut`], [`slice::split_first`],
4262 [`slice::split_last_mut`], [`slice::split_last`],
4263 [`char::from_u32_unchecked`], [`fs::canonicalize`],
4264 [`str::MatchIndices`], [`str::RMatchIndices`],
4265 [`str::match_indices`], [`str::rmatch_indices`],
4266 [`str::slice_mut_unchecked`], [`string::ParseError`].
4267 * Rust applications hosted on crates.io can be installed locally to
4268 `~/.cargo/bin` with the [`cargo install`] command. Among other
4269 things this makes it easier to augment Cargo with new subcommands:
4270 when a binary named e.g. `cargo-foo` is found in `$PATH` it can be
4271 invoked as `cargo foo`.
4272 * Crates with wildcard (`*`) dependencies will [emit warnings when
4273 published][1.5w]. In 1.6 it will no longer be possible to publish
4274 crates with wildcard dependencies.
4279 * The rules determining when a particular lifetime must outlive
4280 a particular value (known as '[dropck]') have been [modified
4281 to not rely on parametricity][1.5p].
4282 * [Implementations of `AsRef` and `AsMut` were added to `Box`, `Rc`,
4283 and `Arc`][1.5a]. Because these smart pointer types implement
4284 `Deref`, this causes breakage in cases where the interior type
4285 contains methods of the same name.
4286 * [Correct a bug in Rc/Arc][1.5c] that caused [dropck] to be unaware
4287 that they could drop their content. Soundness fix.
4288 * All method invocations are [properly checked][1.5wf1] for
4289 [well-formedness][1.5wf2]. Soundness fix.
4290 * Traits whose supertraits contain `Self` are [not object
4291 safe][1.5o]. Soundness fix.
4292 * Target specifications support a [`no_default_libraries`][1.5nd]
4293 setting that controls whether `-nodefaultlibs` is passed to the
4294 linker, and in turn the `is_like_windows` setting no longer affects
4295 the `-nodefaultlibs` flag.
4296 * `#[derive(Show)]`, long-deprecated, [has been removed][1.5ds].
4297 * The `#[inline]` and `#[repr]` attributes [can only appear
4298 in valid locations][1.5at].
4299 * Native libraries linked from the local crate are [passed to
4300 the linker before native libraries from upstream crates][1.5nl].
4301 * Two rarely-used attributes, `#[no_debug]` and
4302 `#[omit_gdb_pretty_printer_section]` [are feature gated][1.5fg].
4303 * Negation of unsigned integers, which has been a warning for
4304 several releases, [is now behind a feature gate and will
4305 generate errors][1.5nu].
4306 * The parser accidentally accepted visibility modifiers on
4307 enum variants, a bug [which has been fixed][1.5ev].
4308 * [A bug was fixed that allowed `use` statements to import unstable
4314 * When evaluating expressions at compile-time that are not
4315 compile-time constants (const-evaluating expressions in non-const
4316 contexts), incorrect code such as overlong bitshifts and arithmetic
4317 overflow will [generate a warning instead of an error][1.5ce],
4318 delaying the error until runtime. This will allow the
4319 const-evaluator to be expanded in the future backwards-compatibly.
4320 * The `improper_ctypes` lint [no longer warns about using `isize` and
4321 `usize` in FFI][1.5ict].
4326 * `Arc<T>` and `Rc<T>` are [covariant with respect to `T` instead of
4328 * `Default` is [implemented for mutable slices][1.5d].
4329 * `FromStr` is [implemented for `SockAddrV4` and `SockAddrV6`][1.5s].
4330 * There are now `From` conversions [between floating point
4331 types][1.5f] where the conversions are lossless.
4332 * There are now `From` conversions [between integer types][1.5i] where
4333 the conversions are lossless.
4334 * [`fs::Metadata` implements `Clone`][1.5fs].
4335 * The `parse` method [accepts a leading "+" when parsing
4337 * [`AsMut` is implemented for `Vec`][1.5am].
4338 * The `clone_from` implementations for `String` and `BinaryHeap` [have
4339 been optimized][1.5cf] and no longer rely on the default impl.
4340 * The `extern "Rust"`, `extern "C"`, `unsafe extern "Rust"` and
4341 `unsafe extern "C"` function types now [implement `Clone`,
4342 `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and
4343 `fmt::Debug` for up to 12 arguments][1.5fp].
4344 * [Dropping `Vec`s is much faster in unoptimized builds when the
4345 element types don't implement `Drop`][1.5dv].
4346 * A bug that caused in incorrect behavior when [combining `VecDeque`
4347 with zero-sized types][1.5vdz] was resolved.
4348 * [`PartialOrd` for slices is faster][1.5po].
4353 * [Crate metadata size was reduced by 20%][1.5md].
4354 * [Improvements to code generation reduced the size of libcore by 3.3
4355 MB and rustc's memory usage by 18MB][1.5m].
4356 * [Improvements to deref translation increased performance in
4357 unoptimized builds][1.5dr].
4358 * Various errors in trait resolution [are deduplicated to only be
4359 reported once][1.5te].
4360 * Rust has preliminary [support for rumprun kernels][1.5rr].
4361 * Rust has preliminary [support for NetBSD on amd64][1.5na].
4363 [1.5use]: https://github.com/rust-lang/rust/pull/28364
4364 [1.5po]: https://github.com/rust-lang/rust/pull/28436
4365 [1.5ev]: https://github.com/rust-lang/rust/pull/28442
4366 [1.5nu]: https://github.com/rust-lang/rust/pull/28468
4367 [1.5dr]: https://github.com/rust-lang/rust/pull/28491
4368 [1.5vdz]: https://github.com/rust-lang/rust/pull/28494
4369 [1.5md]: https://github.com/rust-lang/rust/pull/28521
4370 [1.5fg]: https://github.com/rust-lang/rust/pull/28522
4371 [1.5dv]: https://github.com/rust-lang/rust/pull/28531
4372 [1.5na]: https://github.com/rust-lang/rust/pull/28543
4373 [1.5fp]: https://github.com/rust-lang/rust/pull/28560
4374 [1.5rr]: https://github.com/rust-lang/rust/pull/28593
4375 [1.5cf]: https://github.com/rust-lang/rust/pull/28602
4376 [1.5nl]: https://github.com/rust-lang/rust/pull/28605
4377 [1.5te]: https://github.com/rust-lang/rust/pull/28645
4378 [1.5at]: https://github.com/rust-lang/rust/pull/28650
4379 [1.5am]: https://github.com/rust-lang/rust/pull/28663
4380 [1.5m]: https://github.com/rust-lang/rust/pull/28778
4381 [1.5ict]: https://github.com/rust-lang/rust/pull/28779
4382 [1.5a]: https://github.com/rust-lang/rust/pull/28811
4383 [1.5pi]: https://github.com/rust-lang/rust/pull/28826
4384 [1.5ce]: https://github.com/rust-lang/rfcs/blob/master/text/1229-compile-time-asserts.md
4385 [1.5p]: https://github.com/rust-lang/rfcs/blob/master/text/1238-nonparametric-dropck.md
4386 [1.5i]: https://github.com/rust-lang/rust/pull/28921
4387 [1.5fs]: https://github.com/rust-lang/rust/pull/29021
4388 [1.5f]: https://github.com/rust-lang/rust/pull/29129
4389 [1.5ds]: https://github.com/rust-lang/rust/pull/29148
4390 [1.5s]: https://github.com/rust-lang/rust/pull/29190
4391 [1.5d]: https://github.com/rust-lang/rust/pull/29245
4392 [1.5o]: https://github.com/rust-lang/rust/pull/29259
4393 [1.5nd]: https://github.com/rust-lang/rust/pull/28578
4394 [1.5wf2]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
4395 [1.5wf1]: https://github.com/rust-lang/rust/pull/28669
4396 [dropck]: https://doc.rust-lang.org/nightly/nomicon/dropck.html
4397 [1.5c]: https://github.com/rust-lang/rust/pull/29110
4398 [1.5w]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
4399 [`cargo install`]: https://github.com/rust-lang/rfcs/blob/master/text/1200-cargo-install.md
4400 [`BinaryHeap::from`]: http://doc.rust-lang.org/nightly/std/convert/trait.From.html#method.from
4401 [`BinaryHeap::into_sorted_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_sorted_vec
4402 [`BinaryHeap::into_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_vec
4403 [`Condvar::wait_timeout`]: http://doc.rust-lang.org/nightly/std/sync/struct.Condvar.html#method.wait_timeout
4404 [`FileTypeExt::is_block_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_block_device
4405 [`FileTypeExt::is_char_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_char_device
4406 [`FileTypeExt::is_fifo`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_fifo
4407 [`FileTypeExt::is_socket`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_socket
4408 [`FileTypeExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html
4409 [`Formatter::alternate`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.alternate
4410 [`Formatter::fill`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.fill
4411 [`Formatter::precision`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.precision
4412 [`Formatter::sign_aware_zero_pad`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_aware_zero_pad
4413 [`Formatter::sign_minus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_minus
4414 [`Formatter::sign_plus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_plus
4415 [`Formatter::width`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.width
4416 [`Iterator::cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.cmp
4417 [`Iterator::eq`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.eq
4418 [`Iterator::ge`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ge
4419 [`Iterator::gt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.gt
4420 [`Iterator::le`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.le
4421 [`Iterator::lt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.lt
4422 [`Iterator::ne`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ne
4423 [`Iterator::partial_cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.partial_cmp
4424 [`Path::canonicalize`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.canonicalize
4425 [`Path::exists`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.exists
4426 [`Path::is_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_dir
4427 [`Path::is_file`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_file
4428 [`Path::metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.metadata
4429 [`Path::read_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_dir
4430 [`Path::read_link`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_link
4431 [`Path::symlink_metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.symlink_metadata
4432 [`Utf8Error::valid_up_to`]: http://doc.rust-lang.org/nightly/core/str/struct.Utf8Error.html#method.valid_up_to
4433 [`Vec::resize`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.resize
4434 [`VecDeque::as_mut_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_mut_slices
4435 [`VecDeque::as_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_slices
4436 [`VecDeque::insert`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.insert
4437 [`VecDeque::shrink_to_fit`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.shrink_to_fit
4438 [`VecDeque::swap_remove_back`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_back
4439 [`VecDeque::swap_remove_front`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_front
4440 [`slice::split_first_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first_mut
4441 [`slice::split_first`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first
4442 [`slice::split_last_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last_mut
4443 [`slice::split_last`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last
4444 [`char::from_u32_unchecked`]: http://doc.rust-lang.org/nightly/std/char/fn.from_u32_unchecked.html
4445 [`fs::canonicalize`]: http://doc.rust-lang.org/nightly/std/fs/fn.canonicalize.html
4446 [`str::MatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.MatchIndices.html
4447 [`str::RMatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.RMatchIndices.html
4448 [`str::match_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.match_indices
4449 [`str::rmatch_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatch_indices
4450 [`str::slice_mut_unchecked`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.slice_mut_unchecked
4451 [`string::ParseError`]: http://doc.rust-lang.org/nightly/std/string/enum.ParseError.html
4453 Version 1.4.0 (2015-10-29)
4454 ==========================
4456 * ~1200 changes, numerous bugfixes
4461 * Windows builds targeting the 64-bit MSVC ABI and linker (instead of
4462 GNU) are now supported and recommended for use.
4467 * [Several changes have been made to fix type soundness and improve
4468 the behavior of associated types][sound]. See [RFC 1214]. Although
4469 we have mostly introduced these changes as warnings this release, to
4470 become errors next release, there are still some scenarios that will
4471 see immediate breakage.
4472 * [The `str::lines` and `BufRead::lines` iterators treat `\r\n` as
4473 line breaks in addition to `\n`][crlf].
4474 * [Loans of `'static` lifetime extend to the end of a function][stat].
4475 * [`str::parse` no longer introduces avoidable rounding error when
4476 parsing floating point numbers. Together with earlier changes to
4477 float formatting/output, "round trips" like f.to_string().parse()
4478 now preserve the value of f exactly. Additionally, leading plus
4479 signs are now accepted][fp3].
4485 * `use` statements that import multiple items [can now rename
4486 them][i], as in `use foo::{bar as kitten, baz as puppy}`.
4487 * [Binops work correctly on fat pointers][binfat].
4488 * `pub extern crate`, which does not behave as expected, [issues a
4489 warning][pec] until a better solution is found.
4494 * [Many APIs were stabilized][stab]: `<Box<str>>::into_string`,
4495 [`Arc::downgrade`], [`Arc::get_mut`], [`Arc::make_mut`],
4496 [`Arc::try_unwrap`], [`Box::from_raw`], [`Box::into_raw`], [`CStr::to_str`],
4497 [`CStr::to_string_lossy`], [`CString::from_raw`], [`CString::into_raw`],
4498 [`IntoRawFd::into_raw_fd`], [`IntoRawFd`],
4499 `IntoRawHandle::into_raw_handle`, `IntoRawHandle`,
4500 `IntoRawSocket::into_raw_socket`, `IntoRawSocket`, [`Rc::downgrade`],
4501 [`Rc::get_mut`], [`Rc::make_mut`], [`Rc::try_unwrap`], [`Result::expect`],
4502 [`String::into_boxed_str`], [`TcpStream::read_timeout`],
4503 [`TcpStream::set_read_timeout`], [`TcpStream::set_write_timeout`],
4504 [`TcpStream::write_timeout`], [`UdpSocket::read_timeout`],
4505 [`UdpSocket::set_read_timeout`], [`UdpSocket::set_write_timeout`],
4506 [`UdpSocket::write_timeout`], `Vec::append`, `Vec::split_off`,
4507 [`VecDeque::append`], [`VecDeque::retain`], [`VecDeque::split_off`],
4508 [`rc::Weak::upgrade`], [`rc::Weak`], [`slice::Iter::as_slice`],
4509 [`slice::IterMut::into_slice`], [`str::CharIndices::as_str`],
4510 [`str::Chars::as_str`], [`str::split_at_mut`], [`str::split_at`],
4511 [`sync::Weak::upgrade`], [`sync::Weak`], [`thread::park_timeout`],
4513 * [Some APIs were deprecated][dep]: `BTreeMap::with_b`,
4514 `BTreeSet::with_b`, `Option::as_mut_slice`, `Option::as_slice`,
4515 `Result::as_mut_slice`, `Result::as_slice`, `f32::from_str_radix`,
4516 `f64::from_str_radix`.
4517 * [Reverse-searching strings is faster with the 'two-way'
4519 * [`std::io::copy` allows `?Sized` arguments][cc].
4520 * The `Windows`, `Chunks`, and `ChunksMut` iterators over slices all
4521 [override `count`, `nth` and `last` with an O(1)
4522 implementation][it].
4523 * [`Default` is implemented for arrays up to `[T; 32]`][d].
4524 * [`IntoRawFd` has been added to the Unix-specific prelude,
4525 `IntoRawSocket` and `IntoRawHandle` to the Windows-specific
4527 * [`Extend<String>` and `FromIterator<String` are both implemented for
4529 * [`IntoIterator` is implemented for references to `Option` and
4531 * [`HashMap` and `HashSet` implement `Extend<&T>` where `T:
4532 Copy`][ext] as part of [RFC 839]. This will cause type inference
4533 breakage in rare situations.
4534 * [`BinaryHeap` implements `Debug`][bh2].
4535 * [`Borrow` and `BorrowMut` are implemented for fixed-size
4537 * [`extern fn`s with the "Rust" and "C" ABIs implement common
4538 traits including `Eq`, `Ord`, `Debug`, `Hash`][fp].
4539 * [String comparison is faster][faststr].
4540 * `&mut T` where `T: std::fmt::Write` [also implements
4541 `std::fmt::Write`][mutw].
4542 * [A stable regression in `VecDeque::push_back` and other
4543 capacity-altering methods that caused panics for zero-sized types
4545 * [Function pointers implement traits for up to 12 parameters][fp2].
4550 * The compiler [no longer uses the 'morestack' feature to prevent
4551 stack overflow][mm]. Instead it uses guard pages and stack
4552 probes (though stack probes are not yet implemented on any platform
4554 * [The compiler matches traits faster when projections are involved][p].
4555 * The 'improper_ctypes' lint [no longer warns about use of `isize` and
4557 * [Cargo now displays useful information about what its doing during
4558 `cargo update`][cu].
4560 [`Arc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.downgrade
4561 [`Arc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.make_mut
4562 [`Arc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.get_mut
4563 [`Arc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.try_unwrap
4564 [`Box::from_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.from_raw
4565 [`Box::into_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.into_raw
4566 [`CStr::to_str`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_str
4567 [`CStr::to_string_lossy`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_string_lossy
4568 [`CString::from_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.from_raw
4569 [`CString::into_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_raw
4570 [`IntoRawFd::into_raw_fd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html#tymethod.into_raw_fd
4571 [`IntoRawFd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html
4572 [`Rc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.downgrade
4573 [`Rc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.get_mut
4574 [`Rc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.make_mut
4575 [`Rc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.try_unwrap
4576 [`Result::expect`]: http://doc.rust-lang.org/nightly/core/result/enum.Result.html#method.expect
4577 [`String::into_boxed_str`]: http://doc.rust-lang.org/nightly/collections/string/struct.String.html#method.into_boxed_str
4578 [`TcpStream::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
4579 [`TcpStream::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
4580 [`TcpStream::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
4581 [`TcpStream::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
4582 [`UdpSocket::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
4583 [`UdpSocket::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
4584 [`UdpSocket::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
4585 [`UdpSocket::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
4586 [`VecDeque::append`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.append
4587 [`VecDeque::retain`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.retain
4588 [`VecDeque::split_off`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.split_off
4589 [`rc::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html#method.upgrade
4590 [`rc::Weak`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html
4591 [`slice::Iter::as_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.Iter.html#method.as_slice
4592 [`slice::IterMut::into_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.IterMut.html#method.into_slice
4593 [`str::CharIndices::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.CharIndices.html#method.as_str
4594 [`str::Chars::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.Chars.html#method.as_str
4595 [`str::split_at_mut`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at_mut
4596 [`str::split_at`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at
4597 [`sync::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html#method.upgrade
4598 [`sync::Weak`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html
4599 [`thread::park_timeout`]: http://doc.rust-lang.org/nightly/std/thread/fn.park_timeout.html
4600 [`thread::sleep`]: http://doc.rust-lang.org/nightly/std/thread/fn.sleep.html
4601 [bh2]: https://github.com/rust-lang/rust/pull/28156
4602 [binfat]: https://github.com/rust-lang/rust/pull/28270
4603 [bm]: https://github.com/rust-lang/rust/pull/28197
4604 [cc]: https://github.com/rust-lang/rust/pull/27531
4605 [crlf]: https://github.com/rust-lang/rust/pull/28034
4606 [cu]: https://github.com/rust-lang/cargo/pull/1931
4607 [d]: https://github.com/rust-lang/rust/pull/27825
4608 [dep]: https://github.com/rust-lang/rust/pull/28339
4609 [es]: https://github.com/rust-lang/rust/pull/27956
4610 [ext]: https://github.com/rust-lang/rust/pull/28094
4611 [faststr]: https://github.com/rust-lang/rust/pull/28338
4612 [ffi]: https://github.com/rust-lang/rust/pull/28779
4613 [fp]: https://github.com/rust-lang/rust/pull/28268
4614 [fp2]: https://github.com/rust-lang/rust/pull/28560
4615 [fp3]: https://github.com/rust-lang/rust/pull/27307
4616 [i]: https://github.com/rust-lang/rust/pull/27451
4617 [into2]: https://github.com/rust-lang/rust/pull/28039
4618 [it]: https://github.com/rust-lang/rust/pull/27652
4619 [mm]: https://github.com/rust-lang/rust/pull/27338
4620 [mutw]: https://github.com/rust-lang/rust/pull/28368
4621 [sound]: https://github.com/rust-lang/rust/pull/27641
4622 [p]: https://github.com/rust-lang/rust/pull/27866
4623 [pec]: https://github.com/rust-lang/rust/pull/28486
4624 [pr]: https://github.com/rust-lang/rust/pull/27896
4625 [RFC 839]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
4626 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
4627 [s]: https://github.com/rust-lang/rust/pull/27474
4628 [stab]: https://github.com/rust-lang/rust/pull/28339
4629 [stat]: https://github.com/rust-lang/rust/pull/28321
4630 [vd]: https://github.com/rust-lang/rust/pull/28494
4632 Version 1.3.0 (2015-09-17)
4633 ==============================
4635 * ~900 changes, numerous bugfixes
4640 * The [new object lifetime defaults][nold] have been [turned
4641 on][nold2] after a cycle of warnings about the change. Now types
4642 like `&'a Box<Trait>` (or `&'a Rc<Trait>`, etc) will change from
4643 being interpreted as `&'a Box<Trait+'a>` to `&'a
4644 Box<Trait+'static>`.
4645 * [The Rustonomicon][nom] is a new book in the official documentation
4646 that dives into writing unsafe Rust.
4647 * The [`Duration`] API, [has been stabilized][ds]. This basic unit of
4648 timekeeping is employed by other std APIs, as well as out-of-tree
4654 * The [new object lifetime defaults][nold] have been [turned
4655 on][nold2] after a cycle of warnings about the change.
4656 * There is a known [regression][lr] in how object lifetime elision is
4657 interpreted, the proper solution for which is undetermined.
4658 * The `#[prelude_import]` attribute, an internal implementation
4659 detail, was accidentally stabilized previously. [It has been put
4660 behind the `prelude_import` feature gate][pi]. This change is
4661 believed to break no existing code.
4662 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
4663 [more sane for dynamically sized types][dst3]. Code that relied on
4664 the previous behavior is thought to be broken.
4665 * The `dropck` rules, which checks that destructors can't access
4666 destroyed values, [have been updated][dropck] to match the
4667 [RFC][dropckrfc]. This fixes some soundness holes, and as such will
4668 cause some previously-compiling code to no longer build.
4673 * The [new object lifetime defaults][nold] have been [turned
4674 on][nold2] after a cycle of warnings about the change.
4675 * Semicolons may [now follow types and paths in
4676 macros](https://github.com/rust-lang/rust/pull/27000).
4677 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
4678 [more sane for dynamically sized types][dst3]. Code that relied on
4679 the previous behavior is not known to exist, and suspected to be
4681 * `'static` variables [may now be recursive][st].
4682 * `ref` bindings choose between [`Deref`] and [`DerefMut`]
4683 implementations correctly.
4684 * The `dropck` rules, which checks that destructors can't access
4685 destroyed values, [have been updated][dropck] to match the
4691 * The [`Duration`] API, [has been stabilized][ds], as well as the
4692 `std::time` module, which presently contains only `Duration`.
4693 * `Box<str>` and `Box<[T]>` both implement `Clone`.
4694 * The owned C string, [`CString`], implements [`Borrow`] and the
4695 borrowed C string, [`CStr`], implements [`ToOwned`]. The two of
4696 these allow C strings to be borrowed and cloned in generic code.
4697 * [`CStr`] implements [`Debug`].
4698 * [`AtomicPtr`] implements [`Debug`].
4699 * [`Error`] trait objects [can be downcast to their concrete types][e]
4700 in many common configurations, using the [`is`], [`downcast`],
4701 [`downcast_ref`] and [`downcast_mut`] methods, similarly to the
4703 * Searching for substrings now [employs the two-way algorithm][search]
4704 instead of doing a naive search. This gives major speedups to a
4705 number of methods, including [`contains`][sc], [`find`][sf],
4706 [`rfind`][srf], [`split`][ss]. [`starts_with`][ssw] and
4707 [`ends_with`][sew] are also faster.
4708 * The performance of `PartialEq` for slices is [much faster][ps].
4709 * The [`Hash`] trait offers the default method, [`hash_slice`], which
4710 is overridden and optimized by the implementations for scalars.
4711 * The [`Hasher`] trait now has a number of specialized `write_*`
4712 methods for primitive types, for efficiency.
4713 * The I/O-specific error type, [`std::io::Error`][ie], gained a set of
4714 methods for accessing the 'inner error', if any: [`get_ref`][iegr],
4715 [`get_mut`][iegm], [`into_inner`][ieii]. As well, the implementation
4716 of [`std::error::Error::cause`][iec] also delegates to the inner
4718 * [`process::Child`][pc] gained the [`id`] method, which returns a
4719 `u32` representing the platform-specific process identifier.
4720 * The [`connect`] method on slices is deprecated, replaced by the new
4721 [`join`] method (note that both of these are on the *unstable*
4722 [`SliceConcatExt`] trait, but through the magic of the prelude are
4723 available to stable code anyway).
4724 * The [`Div`] operator is implemented for [`Wrapping`] types.
4725 * [`DerefMut` is implemented for `String`][dms].
4726 * Performance of SipHash (the default hasher for `HashMap`) is
4727 [better for long data][sh].
4728 * [`AtomicPtr`] implements [`Send`].
4729 * The [`read_to_end`] implementations for [`Stdin`] and [`File`]
4730 are now [specialized to use uninitialized buffers for increased
4732 * Lifetime parameters of foreign functions [are now resolved
4738 * Rust can now, with some coercion, [produce programs that run on
4739 Windows XP][xp], though XP is not considered a supported platform.
4740 * Porting Rust on Windows from the GNU toolchain to MSVC continues
4741 ([1][win1], [2][win2], [3][win3], [4][win4]). It is still not
4742 recommended for use in 1.3, though should be fully-functional
4743 in the [64-bit 1.4 beta][b14].
4744 * On Fedora-based systems installation will [properly configure the
4745 dynamic linker][fl].
4746 * The compiler gained many new extended error descriptions, which can
4747 be accessed with the `--explain` flag.
4748 * The `dropck` pass, which checks that destructors can't access
4749 destroyed values, [has been rewritten][dropck]. This fixes some
4750 soundness holes, and as such will cause some previously-compiling
4751 code to no longer build.
4752 * `rustc` now uses [LLVM to write archive files where possible][ar].
4753 Eventually this will eliminate the compiler's dependency on the ar
4755 * Rust has [preliminary support for i686 FreeBSD][fb] (it has long
4756 supported FreeBSD on x86_64).
4757 * The [`unused_mut`][lum], [`unconditional_recursion`][lur],
4758 [`improper_ctypes`][lic], and [`negate_unsigned`][lnu] lints are
4760 * If landing pads are disabled (with `-Z no-landing-pads`), [`panic!`
4761 will kill the process instead of leaking][nlp].
4763 [`Any`]: http://doc.rust-lang.org/nightly/std/any/trait.Any.html
4764 [`AtomicPtr`]: http://doc.rust-lang.org/nightly/std/sync/atomic/struct.AtomicPtr.html
4765 [`Borrow`]: http://doc.rust-lang.org/nightly/std/borrow/trait.Borrow.html
4766 [`CStr`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html
4767 [`CString`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html
4768 [`Debug`]: http://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
4769 [`DerefMut`]: http://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
4770 [`Deref`]: http://doc.rust-lang.org/nightly/std/ops/trait.Deref.html
4771 [`Div`]: http://doc.rust-lang.org/nightly/std/ops/trait.Div.html
4772 [`Duration`]: http://doc.rust-lang.org/nightly/std/time/struct.Duration.html
4773 [`Error`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html
4774 [`File`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html
4775 [`Hash`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html
4776 [`Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
4777 [`Send`]: http://doc.rust-lang.org/nightly/std/marker/trait.Send.html
4778 [`SliceConcatExt`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html
4779 [`Stdin`]: http://doc.rust-lang.org/nightly/std/io/struct.Stdin.html
4780 [`ToOwned`]: http://doc.rust-lang.org/nightly/std/borrow/trait.ToOwned.html
4781 [`Wrapping`]: http://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
4782 [`connect`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.connect
4783 [`downcast_mut`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_mut
4784 [`downcast_ref`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_ref
4785 [`downcast`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast
4786 [`hash_slice`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
4787 [`id`]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html#method.id
4788 [`is`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.is
4789 [`join`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.join
4790 [`read_to_end`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_to_end
4791 [ar]: https://github.com/rust-lang/rust/pull/26926
4792 [b14]: https://static.rust-lang.org/dist/rust-beta-x86_64-pc-windows-msvc.msi
4793 [dms]: https://github.com/rust-lang/rust/pull/26241
4794 [dropck]: https://github.com/rust-lang/rust/pull/27261
4795 [dropckrfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
4796 [ds]: https://github.com/rust-lang/rust/pull/26818
4797 [dst1]: http://doc.rust-lang.org/nightly/std/mem/fn.size_of_val.html
4798 [dst2]: http://doc.rust-lang.org/nightly/std/mem/fn.align_of_val.html
4799 [dst3]: https://github.com/rust-lang/rust/pull/27351
4800 [e]: https://github.com/rust-lang/rust/pull/24793
4801 [f]: https://github.com/rust-lang/rust/pull/26588
4802 [fb]: https://github.com/rust-lang/rust/pull/26959
4803 [fl]: https://github.com/rust-lang/rust-installer/pull/41
4804 [hs]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
4805 [ie]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html
4806 [iec]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.cause
4807 [iegm]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_mut
4808 [iegr]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_ref
4809 [ieii]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.into_inner
4810 [lic]: https://github.com/rust-lang/rust/pull/26583
4811 [lnu]: https://github.com/rust-lang/rust/pull/27026
4812 [lr]: https://github.com/rust-lang/rust/issues/27248
4813 [lum]: https://github.com/rust-lang/rust/pull/26378
4814 [lur]: https://github.com/rust-lang/rust/pull/26783
4815 [nlp]: https://github.com/rust-lang/rust/pull/27176
4816 [nold2]: https://github.com/rust-lang/rust/pull/27045
4817 [nold]: https://github.com/rust-lang/rfcs/blob/master/text/1156-adjust-default-object-bounds.md
4818 [nom]: http://doc.rust-lang.org/nightly/nomicon/
4819 [pc]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html
4820 [pi]: https://github.com/rust-lang/rust/pull/26699
4821 [ps]: https://github.com/rust-lang/rust/pull/26884
4822 [rte]: https://github.com/rust-lang/rust/pull/26950
4823 [sc]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.contains
4824 [search]: https://github.com/rust-lang/rust/pull/26327
4825 [sew]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.ends_with
4826 [sf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.find
4827 [sh]: https://github.com/rust-lang/rust/pull/27280
4828 [srf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rfind
4829 [ss]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split
4830 [ssw]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.starts_with
4831 [st]: https://github.com/rust-lang/rust/pull/26630
4832 [win1]: https://github.com/rust-lang/rust/pull/26569
4833 [win2]: https://github.com/rust-lang/rust/pull/26741
4834 [win3]: https://github.com/rust-lang/rust/pull/26741
4835 [win4]: https://github.com/rust-lang/rust/pull/27210
4836 [xp]: https://github.com/rust-lang/rust/pull/26569
4838 Version 1.2.0 (2015-08-07)
4839 ==========================
4841 * ~1200 changes, numerous bugfixes
4846 * [Dynamically-sized-type coercions][dst] allow smart pointer types
4847 like `Rc` to contain types without a fixed size, arrays and trait
4848 objects, finally enabling use of `Rc<[T]>` and completing the
4849 implementation of DST.
4850 * [Parallel codegen][parcodegen] is now working again, which can
4851 substantially speed up large builds in debug mode; It also gets
4852 another ~33% speedup when bootstrapping on a 4 core machine (using 8
4853 jobs). It's not enabled by default, but will be "in the near
4854 future". It can be activated with the `-C codegen-units=N` flag to
4856 * This is the first release with [experimental support for linking
4857 with the MSVC linker and lib C on Windows (instead of using the GNU
4858 variants via MinGW)][win]. It is yet recommended only for the most
4859 intrepid Rustaceans.
4860 * Benchmark compilations are showing a 30% improvement in
4861 bootstrapping over 1.1.
4866 * The [`to_uppercase`] and [`to_lowercase`] methods on `char` now do
4867 unicode case mapping, which is a previously-planned change in
4868 behavior and considered a bugfix.
4869 * [`mem::align_of`] now specifies [the *minimum alignment* for
4870 T][align], which is usually the alignment programs are interested
4871 in, and the same value reported by clang's
4872 `alignof`. [`mem::min_align_of`] is deprecated. This is not known to
4874 * [The `#[packed]` attribute is no longer silently accepted by the
4875 compiler][packed]. This attribute did nothing and code that
4876 mentioned it likely did not work as intended.
4877 * Associated type defaults are [now behind the
4878 `associated_type_defaults` feature gate][ad]. In 1.1 associated type
4879 defaults *did not work*, but could be mentioned syntactically. As
4880 such this breakage has minimal impact.
4885 * Patterns with `ref mut` now correctly invoke [`DerefMut`] when
4886 matching against dereferenceable values.
4891 * The [`Extend`] trait, which grows a collection from an iterator, is
4892 implemented over iterators of references, for `String`, `Vec`,
4893 `LinkedList`, `VecDeque`, `EnumSet`, `BinaryHeap`, `VecMap`,
4894 `BTreeSet` and `BTreeMap`. [RFC][extend-rfc].
4895 * The [`iter::once`] function returns an iterator that yields a single
4896 element, and [`iter::empty`] returns an iterator that yields no
4898 * The [`matches`] and [`rmatches`] methods on `str` return iterators
4899 over substring matches.
4900 * [`Cell`] and [`RefCell`] both implement `Eq`.
4901 * A number of methods for wrapping arithmetic are added to the
4902 integral types, [`wrapping_div`], [`wrapping_rem`],
4903 [`wrapping_neg`], [`wrapping_shl`], [`wrapping_shr`]. These are in
4904 addition to the existing [`wrapping_add`], [`wrapping_sub`], and
4905 [`wrapping_mul`] methods, and alternatives to the [`Wrapping`]
4906 type.. It is illegal for the default arithmetic operations in Rust
4907 to overflow; the desire to wrap must be explicit.
4908 * The `{:#?}` formatting specifier [displays the alternate,
4909 pretty-printed][debugfmt] form of the `Debug` formatter. This
4910 feature was actually introduced prior to 1.0 with little
4912 * [`fmt::Formatter`] implements [`fmt::Write`], a `fmt`-specific trait
4913 for writing data to formatted strings, similar to [`io::Write`].
4914 * [`fmt::Formatter`] adds 'debug builder' methods, [`debug_struct`],
4915 [`debug_tuple`], [`debug_list`], [`debug_set`], [`debug_map`]. These
4916 are used by code generators to emit implementations of [`Debug`].
4917 * `str` has new [`to_uppercase`][strup] and [`to_lowercase`][strlow]
4918 methods that convert case, following Unicode case mapping.
4919 * It is now easier to handle poisoned locks. The [`PoisonError`]
4920 type, returned by failing lock operations, exposes `into_inner`,
4921 `get_ref`, and `get_mut`, which all give access to the inner lock
4922 guard, and allow the poisoned lock to continue to operate. The
4923 `is_poisoned` method of [`RwLock`] and [`Mutex`] can poll for a
4924 poisoned lock without attempting to take the lock.
4925 * On Unix the [`FromRawFd`] trait is implemented for [`Stdio`], and
4926 [`AsRawFd`] for [`ChildStdin`], [`ChildStdout`], [`ChildStderr`].
4927 On Windows the `FromRawHandle` trait is implemented for `Stdio`,
4928 and `AsRawHandle` for `ChildStdin`, `ChildStdout`,
4930 * [`io::ErrorKind`] has a new variant, `InvalidData`, which indicates
4936 * `rustc` employs smarter heuristics for guessing at [typos].
4937 * `rustc` emits more efficient code for [no-op conversions between
4938 unsafe pointers][nop].
4939 * Fat pointers are now [passed in pairs of immediate arguments][fat],
4940 resulting in faster compile times and smaller code.
4942 [`Extend`]: https://doc.rust-lang.org/nightly/std/iter/trait.Extend.html
4943 [extend-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
4944 [`iter::once`]: https://doc.rust-lang.org/nightly/std/iter/fn.once.html
4945 [`iter::empty`]: https://doc.rust-lang.org/nightly/std/iter/fn.empty.html
4946 [`matches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.matches
4947 [`rmatches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatches
4948 [`Cell`]: https://doc.rust-lang.org/nightly/std/cell/struct.Cell.html
4949 [`RefCell`]: https://doc.rust-lang.org/nightly/std/cell/struct.RefCell.html
4950 [`wrapping_add`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_add
4951 [`wrapping_sub`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_sub
4952 [`wrapping_mul`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_mul
4953 [`wrapping_div`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_div
4954 [`wrapping_rem`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_rem
4955 [`wrapping_neg`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_neg
4956 [`wrapping_shl`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shl
4957 [`wrapping_shr`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shr
4958 [`Wrapping`]: https://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
4959 [`fmt::Formatter`]: https://doc.rust-lang.org/nightly/std/fmt/struct.Formatter.html
4960 [`fmt::Write`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Write.html
4961 [`io::Write`]: https://doc.rust-lang.org/nightly/std/io/trait.Write.html
4962 [`debug_struct`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_struct
4963 [`debug_tuple`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_tuple
4964 [`debug_list`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_list
4965 [`debug_set`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_set
4966 [`debug_map`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_map
4967 [`Debug`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
4968 [strup]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_uppercase
4969 [strlow]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_lowercase
4970 [`to_uppercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_uppercase
4971 [`to_lowercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_lowercase
4972 [`PoisonError`]: https://doc.rust-lang.org/nightly/std/sync/struct.PoisonError.html
4973 [`RwLock`]: https://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html
4974 [`Mutex`]: https://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html
4975 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
4976 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
4977 [`Stdio`]: https://doc.rust-lang.org/nightly/std/process/struct.Stdio.html
4978 [`ChildStdin`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdin.html
4979 [`ChildStdout`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdout.html
4980 [`ChildStderr`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStderr.html
4981 [`io::ErrorKind`]: https://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html
4982 [debugfmt]: https://www.reddit.com/r/rust/comments/3ceaui/psa_produces_prettyprinted_debug_output/
4983 [`DerefMut`]: https://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
4984 [`mem::align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.align_of.html
4985 [align]: https://github.com/rust-lang/rust/pull/25646
4986 [`mem::min_align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.min_align_of.html
4987 [typos]: https://github.com/rust-lang/rust/pull/26087
4988 [nop]: https://github.com/rust-lang/rust/pull/26336
4989 [fat]: https://github.com/rust-lang/rust/pull/26411
4990 [dst]: https://github.com/rust-lang/rfcs/blob/master/text/0982-dst-coercion.md
4991 [parcodegen]: https://github.com/rust-lang/rust/pull/26018
4992 [packed]: https://github.com/rust-lang/rust/pull/25541
4993 [ad]: https://github.com/rust-lang/rust/pull/27382
4994 [win]: https://github.com/rust-lang/rust/pull/25350
4996 Version 1.1.0 (2015-06-25)
4997 =========================
4999 * ~850 changes, numerous bugfixes
5004 * The [`std::fs` module has been expanded][fs] to expand the set of
5005 functionality exposed:
5006 * `DirEntry` now supports optimizations like `file_type` and `metadata` which
5007 don't incur a syscall on some platforms.
5008 * A `symlink_metadata` function has been added.
5009 * The `fs::Metadata` structure now lowers to its OS counterpart, providing
5010 access to all underlying information.
5011 * The compiler now contains extended explanations of many errors. When an error
5012 with an explanation occurs the compiler suggests using the `--explain` flag
5013 to read the explanation. Error explanations are also [available online][err-index].
5014 * Thanks to multiple [improvements][sk] to [type checking][pre], as
5015 well as other work, the time to bootstrap the compiler decreased by
5021 * The [`str::split_whitespace`] method splits a string on unicode
5022 whitespace boundaries.
5023 * On both Windows and Unix, new extension traits provide conversion of
5024 I/O types to and from the underlying system handles. On Unix, these
5025 traits are [`FromRawFd`] and [`AsRawFd`], on Windows `FromRawHandle`
5026 and `AsRawHandle`. These are implemented for `File`, `TcpStream`,
5027 `TcpListener`, and `UpdSocket`. Further implementations for
5028 `std::process` will be stabilized later.
5029 * On Unix, [`std::os::unix::symlink`] creates symlinks. On
5030 Windows, symlinks can be created with
5031 `std::os::windows::symlink_dir` and
5032 `std::os::windows::symlink_file`.
5033 * The `mpsc::Receiver` type can now be converted into an iterator with
5034 `into_iter` on the [`IntoIterator`] trait.
5035 * `Ipv4Addr` can be created from `u32` with the `From<u32>`
5036 implementation of the [`From`] trait.
5037 * The `Debug` implementation for `RangeFull` [creates output that is
5038 more consistent with other implementations][rf].
5039 * [`Debug` is implemented for `File`][file].
5040 * The `Default` implementation for `Arc` [no longer requires `Sync +
5042 * [The `Iterator` methods `count`, `nth`, and `last` have been
5043 overridden for slices to have O(1) performance instead of O(n)][si].
5044 * Incorrect handling of paths on Windows has been improved in both the
5045 compiler and the standard library.
5046 * [`AtomicPtr` gained a `Default` implementation][ap].
5047 * In accordance with Rust's policy on arithmetic overflow `abs` now
5048 [panics on overflow when debug assertions are enabled][abs].
5049 * The [`Cloned`] iterator, which was accidentally left unstable for
5050 1.0 [has been stabilized][c].
5051 * The [`Incoming`] iterator, which iterates over incoming TCP
5052 connections, and which was accidentally unnamable in 1.0, [is now
5053 properly exported][inc].
5054 * [`BinaryHeap`] no longer corrupts itself [when functions called by
5055 `sift_up` or `sift_down` panic][bh].
5056 * The [`split_off`] method of `LinkedList` [no longer corrupts
5057 the list in certain scenarios][ll].
5062 * Type checking performance [has improved notably][sk] with
5063 [multiple improvements][pre].
5064 * The compiler [suggests code changes][ch] for more errors.
5065 * rustc and it's build system have experimental support for [building
5066 toolchains against MUSL][m] instead of glibc on Linux.
5067 * The compiler defines the `target_env` cfg value, which is used for
5068 distinguishing toolchains that are otherwise for the same
5069 platform. Presently this is set to `gnu` for common GNU Linux
5070 targets and for MinGW targets, and `musl` for MUSL Linux targets.
5071 * The [`cargo rustc`][crc] command invokes a build with custom flags
5073 * [Android executables are always position independent][pie].
5074 * [The `drop_with_repr_extern` lint warns about mixing `repr(C)`
5077 [`str::split_whitespace`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_whitespace
5078 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
5079 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
5080 [`std::os::unix::symlink`]: https://doc.rust-lang.org/nightly/std/os/unix/fs/fn.symlink.html
5081 [`IntoIterator`]: https://doc.rust-lang.org/nightly/std/iter/trait.IntoIterator.html
5082 [`From`]: https://doc.rust-lang.org/nightly/std/convert/trait.From.html
5083 [rf]: https://github.com/rust-lang/rust/pull/24491
5084 [err-index]: https://doc.rust-lang.org/error-index.html
5085 [sk]: https://github.com/rust-lang/rust/pull/24615
5086 [pre]: https://github.com/rust-lang/rust/pull/25323
5087 [file]: https://github.com/rust-lang/rust/pull/24598
5088 [ch]: https://github.com/rust-lang/rust/pull/24683
5089 [arc]: https://github.com/rust-lang/rust/pull/24695
5090 [si]: https://github.com/rust-lang/rust/pull/24701
5091 [ap]: https://github.com/rust-lang/rust/pull/24834
5092 [m]: https://github.com/rust-lang/rust/pull/24777
5093 [fs]: https://github.com/rust-lang/rfcs/blob/master/text/1044-io-fs-2.1.md
5094 [crc]: https://github.com/rust-lang/cargo/pull/1568
5095 [pie]: https://github.com/rust-lang/rust/pull/24953
5096 [abs]: https://github.com/rust-lang/rust/pull/25441
5097 [c]: https://github.com/rust-lang/rust/pull/25496
5098 [`Cloned`]: https://doc.rust-lang.org/nightly/std/iter/struct.Cloned.html
5099 [`Incoming`]: https://doc.rust-lang.org/nightly/std/net/struct.Incoming.html
5100 [inc]: https://github.com/rust-lang/rust/pull/25522
5101 [bh]: https://github.com/rust-lang/rust/pull/25856
5102 [`BinaryHeap`]: https://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html
5103 [ll]: https://github.com/rust-lang/rust/pull/26022
5104 [`split_off`]: https://doc.rust-lang.org/nightly/collections/linked_list/struct.LinkedList.html#method.split_off
5105 [drop]: https://github.com/rust-lang/rust/pull/24935
5107 Version 1.0.0 (2015-05-15)
5108 ========================
5110 * ~1500 changes, numerous bugfixes
5115 * The vast majority of the standard library is now `#[stable]`. It is
5116 no longer possible to use unstable features with a stable build of
5118 * Many popular crates on [crates.io] now work on the stable release
5120 * Arithmetic on basic integer types now [checks for overflow in debug
5126 * Several [restrictions have been added to trait coherence][coh] in
5127 order to make it easier for upstream authors to change traits
5128 without breaking downstream code.
5129 * Digits of binary and octal literals are [lexed more eagerly][lex] to
5130 improve error messages and macro behavior. For example, `0b1234` is
5131 now lexed as `0b1234` instead of two tokens, `0b1` and `234`.
5132 * Trait bounds [are always invariant][inv], eliminating the need for
5133 the `PhantomFn` and `MarkerTrait` lang items, which have been
5135 * ["-" is no longer a valid character in crate names][cr], the `extern crate
5136 "foo" as bar` syntax has been replaced with `extern crate foo as
5137 bar`, and Cargo now automatically translates "-" in *package* names
5138 to underscore for the crate name.
5139 * [Lifetime shadowing is an error][lt].
5140 * [`Send` no longer implies `'static`][send-rfc].
5141 * [UFCS now supports trait-less associated paths][moar-ufcs] like
5142 `MyType::default()`.
5143 * Primitive types [now have inherent methods][prim-inherent],
5144 obviating the need for extension traits like `SliceExt`.
5145 * Methods with `Self: Sized` in their `where` clause are [considered
5146 object-safe][self-sized], allowing many extension traits like
5147 `IteratorExt` to be merged into the traits they extended.
5148 * You can now [refer to associated types][assoc-where] whose
5149 corresponding trait bounds appear only in a `where` clause.
5150 * The final bits of [OIBIT landed][oibit-final], meaning that traits
5151 like `Send` and `Sync` are now library-defined.
5152 * A [Reflect trait][reflect] was introduced, which means that
5153 downcasting via the `Any` trait is effectively limited to concrete
5154 types. This helps retain the potentially-important "parametricity"
5155 property: generic code cannot behave differently for different type
5156 arguments except in minor ways.
5157 * The `unsafe_destructor` feature is now deprecated in favor of the
5158 [new `dropck`][dropck]. This change is a major reduction in unsafe
5164 * The `thread_local` module [has been renamed to `std::thread`][th].
5165 * The methods of `IteratorExt` [have been moved to the `Iterator`
5167 * Several traits that implement Rust's conventions for type
5168 conversions, `AsMut`, `AsRef`, `From`, and `Into` have been
5169 [centralized in the `std::convert` module][con].
5170 * The `FromError` trait [was removed in favor of `From`][fe].
5171 * The basic sleep function [has moved to
5172 `std::thread::sleep_ms`][slp].
5173 * The `splitn` function now takes an `n` parameter that represents the
5174 number of items yielded by the returned iterator [instead of the
5175 number of 'splits'][spl].
5176 * [On Unix, all file descriptors are `CLOEXEC` by default][clo].
5177 * [Derived implementations of `PartialOrd` now order enums according
5178 to their explicitly-assigned discriminants][po].
5179 * [Methods for searching strings are generic over `Pattern`s][pat],
5180 implemented presently by `&char`, `&str`, `FnMut(char) -> bool` and
5182 * [In method resolution, object methods are resolved before inherent
5184 * [`String::from_str` has been deprecated in favor of the `From` impl,
5185 `String::from`][sf].
5186 * [`io::Error` implements `Sync`][ios].
5187 * [The `words` method on `&str` has been replaced with
5188 `split_whitespace`][sw], to avoid answering the tricky question, 'what is
5190 * The new path and IO modules are complete and `#[stable]`. This
5191 was the major library focus for this cycle.
5192 * The path API was [revised][path-normalize] to normalize `.`,
5193 adjusting the tradeoffs in favor of the most common usage.
5194 * A large number of remaining APIs in `std` were also stabilized
5195 during this cycle; about 75% of the non-deprecated API surface
5197 * The new [string pattern API][string-pattern] landed, which makes
5198 the string slice API much more internally consistent and flexible.
5199 * A new set of [generic conversion traits][conversion] replaced
5200 many existing ad hoc traits.
5201 * Generic numeric traits were [completely removed][num-traits]. This
5202 was made possible thanks to inherent methods for primitive types,
5203 and the removal gives maximal flexibility for designing a numeric
5204 hierarchy in the future.
5205 * The `Fn` traits are now related via [inheritance][fn-inherit]
5206 and provide ergonomic [blanket implementations][fn-blanket].
5207 * The `Index` and `IndexMut` traits were changed to
5208 [take the index by value][index-value], enabling code like
5209 `hash_map["string"]` to work.
5210 * `Copy` now [inherits][copy-clone] from `Clone`, meaning that all
5211 `Copy` data is known to be `Clone` as well.
5216 * Many errors now have extended explanations that can be accessed with
5217 the `--explain` flag to `rustc`.
5218 * Many new examples have been added to the standard library
5220 * rustdoc has received a number of improvements focused on completion
5222 * Metadata was tuned, shrinking binaries [by 27%][metadata-shrink].
5223 * Much headway was made on ecosystem-wide CI, making it possible
5224 to [compare builds for breakage][ci-compare].
5227 [crates.io]: http://crates.io
5228 [clo]: https://github.com/rust-lang/rust/pull/24034
5229 [coh]: https://github.com/rust-lang/rfcs/blob/master/text/1023-rebalancing-coherence.md
5230 [con]: https://github.com/rust-lang/rust/pull/23875
5231 [cr]: https://github.com/rust-lang/rust/pull/23419
5232 [fe]: https://github.com/rust-lang/rust/pull/23879
5233 [ie]: https://github.com/rust-lang/rust/pull/23300
5234 [inv]: https://github.com/rust-lang/rust/pull/23938
5235 [ios]: https://github.com/rust-lang/rust/pull/24133
5236 [lex]: https://github.com/rust-lang/rfcs/blob/master/text/0879-small-base-lexing.md
5237 [lt]: https://github.com/rust-lang/rust/pull/24057
5238 [meth]: https://github.com/rust-lang/rust/pull/24056
5239 [pat]: https://github.com/rust-lang/rfcs/blob/master/text/0528-string-patterns.md
5240 [po]: https://github.com/rust-lang/rust/pull/24270
5241 [sf]: https://github.com/rust-lang/rust/pull/24517
5242 [slp]: https://github.com/rust-lang/rust/pull/23949
5243 [spl]: https://github.com/rust-lang/rfcs/blob/master/text/0979-align-splitn-with-other-languages.md
5244 [sw]: https://github.com/rust-lang/rfcs/blob/master/text/1054-str-words.md
5245 [th]: https://github.com/rust-lang/rfcs/blob/master/text/0909-move-thread-local-to-std-thread.md
5246 [send-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0458-send-improvements.md
5247 [moar-ufcs]: https://github.com/rust-lang/rust/pull/22172
5248 [prim-inherent]: https://github.com/rust-lang/rust/pull/23104
5249 [overflow]: https://github.com/rust-lang/rfcs/blob/master/text/0560-integer-overflow.md
5250 [metadata-shrink]: https://github.com/rust-lang/rust/pull/22971
5251 [self-sized]: https://github.com/rust-lang/rust/pull/22301
5252 [assoc-where]: https://github.com/rust-lang/rust/pull/22512
5253 [string-pattern]: https://github.com/rust-lang/rust/pull/22466
5254 [oibit-final]: https://github.com/rust-lang/rust/pull/21689
5255 [reflect]: https://github.com/rust-lang/rust/pull/23712
5256 [conversion]: https://github.com/rust-lang/rfcs/pull/529
5257 [num-traits]: https://github.com/rust-lang/rust/pull/23549
5258 [index-value]: https://github.com/rust-lang/rust/pull/23601
5259 [dropck]: https://github.com/rust-lang/rfcs/pull/769
5260 [ci-compare]: https://gist.github.com/brson/a30a77836fbec057cbee
5261 [fn-inherit]: https://github.com/rust-lang/rust/pull/23282
5262 [fn-blanket]: https://github.com/rust-lang/rust/pull/23895
5263 [copy-clone]: https://github.com/rust-lang/rust/pull/23860
5264 [path-normalize]: https://github.com/rust-lang/rust/pull/23229
5267 Version 1.0.0-alpha.2 (2015-02-20)
5268 =====================================
5270 * ~1300 changes, numerous bugfixes
5274 * The various I/O modules were [overhauled][io-rfc] to reduce
5275 unnecessary abstractions and provide better interoperation with
5276 the underlying platform. The old `io` module remains temporarily
5278 * The standard library now [participates in feature gating][feat],
5279 so use of unstable libraries now requires a `#![feature(...)]`
5280 attribute. The impact of this change is [described on the
5281 forum][feat-forum]. [RFC][feat-rfc].
5285 * `for` loops [now operate on the `IntoIterator` trait][into],
5286 which eliminates the need to call `.iter()`, etc. to iterate
5287 over collections. There are some new subtleties to remember
5288 though regarding what sort of iterators various types yield, in
5289 particular that `for foo in bar { }` yields values from a move
5290 iterator, destroying the original collection. [RFC][into-rfc].
5291 * Objects now have [default lifetime bounds][obj], so you don't
5292 have to write `Box<Trait+'static>` when you don't care about
5293 storing references. [RFC][obj-rfc].
5294 * In types that implement `Drop`, [lifetimes must outlive the
5295 value][drop]. This will soon make it possible to safely
5296 implement `Drop` for types where `#[unsafe_destructor]` is now
5297 required. Read the [gorgeous RFC][drop-rfc] for details.
5298 * The fully qualified <T as Trait>::X syntax lets you set the Self
5299 type for a trait method or associated type. [RFC][ufcs-rfc].
5300 * References to types that implement `Deref<U>` now [automatically
5301 coerce to references][deref] to the dereferenced type `U`,
5302 e.g. `&T where T: Deref<U>` automatically coerces to `&U`. This
5303 should eliminate many unsightly uses of `&*`, as when converting
5304 from references to vectors into references to
5305 slices. [RFC][deref-rfc].
5306 * The explicit [closure kind syntax][close] (`|&:|`, `|&mut:|`,
5307 `|:|`) is obsolete and closure kind is inferred from context.
5308 * [`Self` is a keyword][Self].
5312 * The `Show` and `String` formatting traits [have been
5313 renamed][fmt] to `Debug` and `Display` to more clearly reflect
5314 their related purposes. Automatically getting a string
5315 conversion to use with `format!("{:?}", something_to_debug)` is
5316 now written `#[derive(Debug)]`.
5317 * Abstract [OS-specific string types][osstr], `std::ff::{OsString,
5318 OsStr}`, provide strings in platform-specific encodings for easier
5319 interop with system APIs. [RFC][osstr-rfc].
5320 * The `boxed::into_raw` and `Box::from_raw` functions [convert
5321 between `Box<T>` and `*mut T`][boxraw], a common pattern for
5322 creating raw pointers.
5326 * Certain long error messages of the form 'expected foo found bar'
5327 are now [split neatly across multiple
5328 lines][multiline]. Examples in the PR.
5329 * On Unix Rust can be [uninstalled][un] by running
5330 `/usr/local/lib/rustlib/uninstall.sh`.
5331 * The `#[rustc_on_unimplemented]` attribute, requiring the
5332 'on_unimplemented' feature, lets rustc [display custom error
5333 messages when a trait is expected to be implemented for a type
5338 * Rust is tested against a [LALR grammar][lalr], which parses
5339 almost all the Rust files that rustc does.
5341 [boxraw]: https://github.com/rust-lang/rust/pull/21318
5342 [close]: https://github.com/rust-lang/rust/pull/21843
5343 [deref]: https://github.com/rust-lang/rust/pull/21351
5344 [deref-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0241-deref-conversions.md
5345 [drop]: https://github.com/rust-lang/rust/pull/21972
5346 [drop-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
5347 [feat]: https://github.com/rust-lang/rust/pull/21248
5348 [feat-forum]: https://users.rust-lang.org/t/psa-important-info-about-rustcs-new-feature-staging/82/5
5349 [feat-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0507-release-channels.md
5350 [fmt]: https://github.com/rust-lang/rust/pull/21457
5351 [into]: https://github.com/rust-lang/rust/pull/20790
5352 [into-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md#intoiterator-and-iterable
5353 [io-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
5354 [lalr]: https://github.com/rust-lang/rust/pull/21452
5355 [multiline]: https://github.com/rust-lang/rust/pull/19870
5356 [obj]: https://github.com/rust-lang/rust/pull/22230
5357 [obj-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0599-default-object-bound.md
5358 [onun]: https://github.com/rust-lang/rust/pull/20889
5359 [osstr]: https://github.com/rust-lang/rust/pull/21488
5360 [osstr-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
5361 [Self]: https://github.com/rust-lang/rust/pull/22158
5362 [ufcs-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0132-ufcs.md
5363 [un]: https://github.com/rust-lang/rust/pull/22256
5366 Version 1.0.0-alpha (2015-01-09)
5367 ==================================
5369 * ~2400 changes, numerous bugfixes
5373 * The language itself is considered feature complete for 1.0,
5374 though there will be many usability improvements and bugfixes
5375 before the final release.
5376 * Nearly 50% of the public API surface of the standard library has
5377 been declared 'stable'. Those interfaces are unlikely to change
5379 * The long-running debate over integer types has been
5380 [settled][ints]: Rust will ship with types named `isize` and
5381 `usize`, rather than `int` and `uint`, for pointer-sized
5382 integers. Guidelines will be rolled out during the alpha cycle.
5383 * Most crates that are not `std` have been moved out of the Rust
5384 distribution into the Cargo ecosystem so they can evolve
5385 separately and don't need to be stabilized as quickly, including
5386 'time', 'getopts', 'num', 'regex', and 'term'.
5387 * Documentation continues to be expanded with more API coverage, more
5388 examples, and more in-depth explanations. The guides have been
5389 consolidated into [The Rust Programming Language][trpl].
5390 * "[Rust By Example][rbe]" is now maintained by the Rust team.
5391 * All official Rust binary installers now come with [Cargo], the
5392 Rust package manager.
5396 * Closures have been [completely redesigned][unboxed] to be
5397 implemented in terms of traits, can now be used as generic type
5398 bounds and thus monomorphized and inlined, or via an opaque
5399 pointer (boxed) as in the old system. The new system is often
5400 referred to as 'unboxed' closures.
5401 * Traits now support [associated types][assoc], allowing families
5402 of related types to be defined together and used generically in
5404 * Enum variants are [namespaced by their type names][enum].
5405 * [`where` clauses][where] provide a more versatile and attractive
5406 syntax for specifying generic bounds, though the previous syntax
5408 * Rust again picks a [fallback][fb] (either i32 or f64) for uninferred
5410 * Rust [no longer has a runtime][rt] of any description, and only
5411 supports OS threads, not green threads.
5412 * At long last, Rust has been overhauled for 'dynamically-sized
5413 types' ([DST]), which integrates 'fat pointers' (object types,
5414 arrays, and `str`) more deeply into the type system, making it
5416 * Rust now has a general [range syntax][range], `i..j`, `i..`, and
5417 `..j` that produce range types and which, when combined with the
5418 `Index` operator and multidispatch, leads to a convenient slice
5420 * The new range syntax revealed an ambiguity in the fixed-length
5421 array syntax, so now fixed length arrays [are written `[T;
5423 * The `Copy` trait is no longer implemented automatically. Unsafe
5424 pointers no longer implement `Sync` and `Send` so types
5425 containing them don't automatically either. `Sync` and `Send`
5426 are now 'unsafe traits' so one can "forcibly" implement them via
5427 `unsafe impl` if a type confirms to the requirements for them
5428 even though the internals do not (e.g. structs containing unsafe
5429 pointers like `Arc`). These changes are intended to prevent some
5430 footguns and are collectively known as [opt-in built-in
5431 traits][oibit] (though `Sync` and `Send` will soon become pure
5432 library types unknown to the compiler).
5433 * Operator traits now take their operands [by value][ops], and
5434 comparison traits can use multidispatch to compare one type
5435 against multiple other types, allowing e.g. `String` to be
5436 compared with `&str`.
5437 * `if let` and `while let` are no longer feature-gated.
5438 * Rust has adopted a more [uniform syntax for escaping unicode
5439 characters][unicode].
5440 * `macro_rules!` [has been declared stable][mac]. Though it is a
5441 flawed system it is sufficiently popular that it must be usable
5442 for 1.0. Effort has gone into [future-proofing][mac-future] it
5443 in ways that will allow other macro systems to be developed in
5444 parallel, and won't otherwise impact the evolution of the
5446 * The prelude has been [pared back significantly][prelude] such
5447 that it is the minimum necessary to support the most pervasive
5448 code patterns, and through [generalized where clauses][where]
5449 many of the prelude extension traits have been consolidated.
5450 * Rust's rudimentary reflection [has been removed][refl], as it
5451 incurred too much code generation for little benefit.
5452 * [Struct variants][structvars] are no longer feature-gated.
5453 * Trait bounds can be [polymorphic over lifetimes][hrtb]. Also
5454 known as 'higher-ranked trait bounds', this crucially allows
5455 unboxed closures to work.
5456 * Macros invocations surrounded by parens or square brackets and
5457 not terminated by a semicolon are [parsed as
5458 expressions][macros], which makes expressions like `vec![1i32,
5459 2, 3].len()` work as expected.
5460 * Trait objects now implement their traits automatically, and
5461 traits that can be coerced to objects now must be [object
5463 * Automatically deriving traits is now done with `#[derive(...)]`
5464 not `#[deriving(...)]` for [consistency with other naming
5465 conventions][derive].
5466 * Importing the containing module or enum at the same time as
5467 items or variants they contain is [now done with `self` instead
5468 of `mod`][self], as in use `foo::{self, bar}`
5469 * Glob imports are no longer feature-gated.
5470 * The `box` operator and `box` patterns have been feature-gated
5471 pending a redesign. For now unique boxes should be allocated
5472 like other containers, with `Box::new`.
5476 * A [series][coll1] of [efforts][coll2] to establish
5477 [conventions][coll3] for collections types has resulted in API
5478 improvements throughout the standard library.
5479 * New [APIs for error handling][err] provide ergonomic interop
5480 between error types, and [new conventions][err-conv] describe
5481 more clearly the recommended error handling strategies in Rust.
5482 * The `fail!` macro has been renamed to [`panic!`][panic] so that
5483 it is easier to discuss failure in the context of error handling
5484 without making clarifications as to whether you are referring to
5485 the 'fail' macro or failure more generally.
5486 * On Linux, `OsRng` prefers the new, more reliable `getrandom`
5487 syscall when available.
5488 * The 'serialize' crate has been renamed 'rustc-serialize' and
5489 moved out of the distribution to Cargo. Although it is widely
5490 used now, it is expected to be superseded in the near future.
5491 * The `Show` formatter, typically implemented with
5492 `#[derive(Show)]` is [now requested with the `{:?}`
5493 specifier][show] and is intended for use by all types, for uses
5494 such as `println!` debugging. The new `String` formatter must be
5495 implemented by hand, uses the `{}` specifier, and is intended
5496 for full-fidelity conversions of things that can logically be
5497 represented as strings.
5501 * [Flexible target specification][flex] allows rustc's code
5502 generation to be configured to support otherwise-unsupported
5504 * Rust comes with rust-gdb and rust-lldb scripts that launch their
5505 respective debuggers with Rust-appropriate pretty-printing.
5506 * The Windows installation of Rust is distributed with the
5507 MinGW components currently required to link binaries on that
5512 * Nullable enum optimizations have been extended to more types so
5513 that e.g. `Option<Vec<T>>` and `Option<String>` take up no more
5514 space than the inner types themselves.
5515 * Work has begun on supporting AArch64.
5517 [Cargo]: https://crates.io
5518 [unboxed]: http://smallcultfollowing.com/babysteps/blog/2014/11/26/purging-proc/
5519 [enum]: https://github.com/rust-lang/rfcs/blob/master/text/0390-enum-namespacing.md
5520 [flex]: https://github.com/rust-lang/rfcs/blob/master/text/0131-target-specification.md
5521 [err]: https://github.com/rust-lang/rfcs/blob/master/text/0201-error-chaining.md
5522 [err-conv]: https://github.com/rust-lang/rfcs/blob/master/text/0236-error-conventions.md
5523 [rt]: https://github.com/rust-lang/rfcs/blob/master/text/0230-remove-runtime.md
5524 [mac]: https://github.com/rust-lang/rfcs/blob/master/text/0453-macro-reform.md
5525 [mac-future]: https://github.com/rust-lang/rfcs/pull/550
5526 [DST]: http://smallcultfollowing.com/babysteps/blog/2014/01/05/dst-take-5/
5527 [coll1]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md
5528 [coll2]: https://github.com/rust-lang/rfcs/blob/master/text/0509-collections-reform-part-2.md
5529 [coll3]: https://github.com/rust-lang/rfcs/blob/master/text/0216-collection-views.md
5530 [ops]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md
5531 [prelude]: https://github.com/rust-lang/rfcs/blob/master/text/0503-prelude-stabilization.md
5532 [where]: https://github.com/rust-lang/rfcs/blob/master/text/0135-where.md
5533 [refl]: https://github.com/rust-lang/rfcs/blob/master/text/0379-remove-reflection.md
5534 [panic]: https://github.com/rust-lang/rfcs/blob/master/text/0221-panic.md
5535 [structvars]: https://github.com/rust-lang/rfcs/blob/master/text/0418-struct-variants.md
5536 [hrtb]: https://github.com/rust-lang/rfcs/blob/master/text/0387-higher-ranked-trait-bounds.md
5537 [unicode]: https://github.com/rust-lang/rfcs/blob/master/text/0446-es6-unicode-escapes.md
5538 [oibit]: https://github.com/rust-lang/rfcs/blob/master/text/0019-opt-in-builtin-traits.md
5539 [macros]: https://github.com/rust-lang/rfcs/blob/master/text/0378-expr-macros.md
5540 [range]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md#indexing-and-slicing
5541 [arrays]: https://github.com/rust-lang/rfcs/blob/master/text/0520-new-array-repeat-syntax.md
5542 [show]: https://github.com/rust-lang/rfcs/blob/master/text/0504-show-stabilization.md
5543 [derive]: https://github.com/rust-lang/rfcs/blob/master/text/0534-deriving2derive.md
5544 [self]: https://github.com/rust-lang/rfcs/blob/master/text/0532-self-in-use.md
5545 [fb]: https://github.com/rust-lang/rfcs/blob/master/text/0212-restore-int-fallback.md
5546 [objsafe]: https://github.com/rust-lang/rfcs/blob/master/text/0255-object-safety.md
5547 [assoc]: https://github.com/rust-lang/rfcs/blob/master/text/0195-associated-items.md
5548 [ints]: https://github.com/rust-lang/rfcs/pull/544#issuecomment-68760871
5549 [trpl]: https://doc.rust-lang.org/book/index.html
5550 [rbe]: http://rustbyexample.com/
5553 Version 0.12.0 (2014-10-09)
5554 =============================
5556 * ~1900 changes, numerous bugfixes
5560 * The introductory documentation (now called The Rust Guide) has
5561 been completely rewritten, as have a number of supplementary
5563 * Rust's package manager, Cargo, continues to improve and is
5564 sometimes considered to be quite awesome.
5565 * Many API's in `std` have been reviewed and updated for
5566 consistency with the in-development Rust coding
5567 guidelines. The standard library documentation tracks
5568 stabilization progress.
5569 * Minor libraries have been moved out-of-tree to the rust-lang org
5570 on GitHub: uuid, semver, glob, num, hexfloat, fourcc. They can
5571 be installed with Cargo.
5572 * Lifetime elision allows lifetime annotations to be left off of
5573 function declarations in many common scenarios.
5574 * Rust now works on 64-bit Windows.
5577 * Indexing can be overloaded with the `Index` and `IndexMut`
5579 * The `if let` construct takes a branch only if the `let` pattern
5580 matches, currently behind the 'if_let' feature gate.
5581 * 'where clauses', a more flexible syntax for specifying trait
5582 bounds that is more aesthetic, have been added for traits and
5583 free functions. Where clauses will in the future make it
5584 possible to constrain associated types, which would be
5585 impossible with the existing syntax.
5586 * A new slicing syntax (e.g. `[0..4]`) has been introduced behind
5587 the 'slicing_syntax' feature gate, and can be overloaded with
5588 the `Slice` or `SliceMut` traits.
5589 * The syntax for matching of sub-slices has been changed to use a
5590 postfix `..` instead of prefix (.e.g. `[a, b, c..]`), for
5591 consistency with other uses of `..` and to future-proof
5592 potential additional uses of the syntax.
5593 * The syntax for matching inclusive ranges in patterns has changed
5594 from `0..3` to `0...4` to be consistent with the exclusive range
5596 * Matching of sub-slices in non-tail positions (e.g. `[a.., b,
5597 c]`) has been put behind the 'advanced_slice_patterns' feature
5598 gate and may be removed in the future.
5599 * Components of tuples and tuple structs can be extracted using
5600 the `value.0` syntax, currently behind the `tuple_indexing`
5602 * The `#[crate_id]` attribute is no longer supported; versioning
5603 is handled by the package manager.
5604 * Renaming crate imports are now written `extern crate foo as bar`
5605 instead of `extern crate bar = foo`.
5606 * Renaming use statements are now written `use foo as bar` instead
5608 * `let` and `match` bindings and argument names in macros are now
5610 * The new, more efficient, closure types ('unboxed closures') have
5611 been added under a feature gate, 'unboxed_closures'. These will
5612 soon replace the existing closure types, once higher-ranked
5613 trait lifetimes are added to the language.
5614 * `move` has been added as a keyword, for indicating closures
5615 that capture by value.
5616 * Mutation and assignment is no longer allowed in pattern guards.
5617 * Generic structs and enums can now have trait bounds.
5618 * The `Share` trait is now called `Sync` to free up the term
5619 'shared' to refer to 'shared reference' (the default reference
5621 * Dynamically-sized types have been mostly implemented,
5622 unifying the behavior of fat-pointer types with the rest of the
5624 * As part of dynamically-sized types, the `Sized` trait has been
5625 introduced, which qualifying types implement by default, and
5626 which type parameters expect by default. To specify that a type
5627 parameter does not need to be sized, write `<Sized? T>`. Most
5628 types are `Sized`, notable exceptions being unsized arrays
5629 (`[T]`) and trait types.
5630 * Closures can return `!`, as in `|| -> !` or `proc() -> !`.
5631 * Lifetime bounds can now be applied to type parameters and object
5633 * The old, reference counted GC type, `Gc<T>` which was once
5634 denoted by the `@` sigil, has finally been removed. GC will be
5635 revisited in the future.
5638 * Library documentation has been improved for a number of modules.
5639 * Bit-vectors, collections::bitv has been modernized.
5640 * The url crate is deprecated in favor of
5641 http://github.com/servo/rust-url, which can be installed with
5643 * Most I/O stream types can be cloned and subsequently closed from
5645 * A `std::time::Duration` type has been added for use in I/O
5646 methods that rely on timers, as well as in the 'time' crate's
5647 `Timespec` arithmetic.
5648 * The runtime I/O abstraction layer that enabled the green thread
5649 scheduler to do non-thread-blocking I/O has been removed, along
5650 with the libuv-based implementation employed by the green thread
5651 scheduler. This will greatly simplify the future I/O work.
5652 * `collections::btree` has been rewritten to have a more
5653 idiomatic and efficient design.
5656 * rustdoc output now indicates the stability levels of API's.
5657 * The `--crate-name` flag can specify the name of the crate
5658 being compiled, like `#[crate_name]`.
5659 * The `-C metadata` specifies additional metadata to hash into
5660 symbol names, and `-C extra-filename` specifies additional
5661 information to put into the output filename, for use by the
5662 package manager for versioning.
5663 * debug info generation has continued to improve and should be
5664 more reliable under both gdb and lldb.
5665 * rustc has experimental support for compiling in parallel
5666 using the `-C codegen-units` flag.
5667 * rustc no longer encodes rpath information into binaries by
5671 * Stack usage has been optimized with LLVM lifetime annotations.
5672 * Official Rust binaries on Linux are more compatible with older
5673 kernels and distributions, built on CentOS 5.10.
5676 Version 0.11.0 (2014-07-02)
5677 ==========================
5679 * ~1700 changes, numerous bugfixes
5682 * ~[T] has been removed from the language. This type is superseded by
5684 * ~str has been removed from the language. This type is superseded by
5686 * ~T has been removed from the language. This type is superseded by the
5688 * @T has been removed from the language. This type is superseded by the
5689 standard library's std::gc::Gc<T> type.
5690 * Struct fields are now all private by default.
5691 * Vector indices and shift amounts are both required to be a `uint`
5692 instead of any integral type.
5693 * Byte character, byte string, and raw byte string literals are now all
5694 supported by prefixing the normal literal with a `b`.
5695 * Multiple ABIs are no longer allowed in an ABI string
5696 * The syntax for lifetimes on closures/procedures has been tweaked
5697 slightly: `<'a>|A, B|: 'b + K -> T`
5698 * Floating point modulus has been removed from the language; however it
5699 is still provided by a library implementation.
5700 * Private enum variants are now disallowed.
5701 * The `priv` keyword has been removed from the language.
5702 * A closure can no longer be invoked through a &-pointer.
5703 * The `use foo, bar, baz;` syntax has been removed from the language.
5704 * The transmute intrinsic no longer works on type parameters.
5705 * Statics now allow blocks/items in their definition.
5706 * Trait bounds are separated from objects with + instead of : now.
5707 * Objects can no longer be read while they are mutably borrowed.
5708 * The address of a static is now marked as insignificant unless the
5709 #[inline(never)] attribute is placed it.
5710 * The #[unsafe_destructor] attribute is now behind a feature gate.
5711 * Struct literals are no longer allowed in ambiguous positions such as
5712 if, while, match, and for..in.
5713 * Declaration of lang items and intrinsics are now feature-gated by
5715 * Integral literals no longer default to `int`, and floating point
5716 literals no longer default to `f64`. Literals must be suffixed with an
5717 appropriate type if inference cannot determine the type of the
5719 * The Box<T> type is no longer implicitly borrowed to &mut T.
5720 * Procedures are now required to not capture borrowed references.
5723 * The standard library is now a "facade" over a number of underlying
5724 libraries. This means that development on the standard library should
5725 be speedier due to smaller crates, as well as a clearer line between
5727 * A new library, libcore, lives under the standard library's facade
5728 which is Rust's "0-assumption" library, suitable for embedded and
5729 kernel development for example.
5730 * A regex crate has been added to the standard distribution. This crate
5731 includes statically compiled regular expressions.
5732 * The unwrap/unwrap_err methods on Result require a Show bound for
5733 better error messages.
5734 * The return types of the std::comm primitives have been centralized
5735 around the Result type.
5736 * A number of I/O primitives have gained the ability to time out their
5738 * A number of I/O primitives have gained the ability to close their
5739 reading/writing halves to cancel pending operations.
5740 * Reverse iterator methods have been removed in favor of `rev()` on
5741 their forward-iteration counterparts.
5742 * A bitflags! macro has been added to enable easy interop with C and
5743 management of bit flags.
5744 * A debug_assert! macro is now provided which is disabled when
5745 `--cfg ndebug` is passed to the compiler.
5746 * A graphviz crate has been added for creating .dot files.
5747 * The std::cast module has been migrated into std::mem.
5748 * The std::local_data api has been migrated from freestanding functions
5749 to being based on methods.
5750 * The Pod trait has been renamed to Copy.
5751 * jemalloc has been added as the default allocator for types.
5752 * The API for allocating memory has been changed to use proper alignment
5753 and sized deallocation
5754 * Connecting a TcpStream or binding a TcpListener is now based on a
5755 string address and a u16 port. This allows connecting to a hostname as
5757 * The Reader trait now contains a core method, read_at_least(), which
5758 correctly handles many repeated 0-length reads.
5759 * The process-spawning API is now centered around a builder-style
5761 * The :? printing qualifier has been moved from the standard library to
5762 an external libdebug crate.
5763 * Eq/Ord have been renamed to PartialEq/PartialOrd. TotalEq/TotalOrd
5764 have been renamed to Eq/Ord.
5765 * The select/plural methods have been removed from format!. The escapes
5766 for { and } have also changed from \{ and \} to {{ and }},
5768 * The TaskBuilder API has been re-worked to be a true builder, and
5769 extension traits for spawning native/green tasks have been added.
5772 * All breaking changes to the language or libraries now have their
5773 commit message annotated with `[breaking-change]` to allow for easy
5774 discovery of breaking changes.
5775 * The compiler will now try to suggest how to annotate lifetimes if a
5776 lifetime-related error occurs.
5777 * Debug info continues to be improved greatly with general bug fixes and
5778 better support for situations like link time optimization (LTO).
5779 * Usage of syntax extensions when cross-compiling has been fixed.
5780 * Functionality equivalent to GCC & Clang's -ffunction-sections,
5781 -fdata-sections and --gc-sections has been enabled by default
5782 * The compiler is now stricter about where it will load module files
5783 from when a module is declared via `mod foo;`.
5784 * The #[phase(syntax)] attribute has been renamed to #[phase(plugin)].
5785 Syntax extensions are now discovered via a "plugin registrar" type
5786 which will be extended in the future to other various plugins.
5787 * Lints have been restructured to allow for dynamically loadable lints.
5788 * A number of rustdoc improvements:
5789 * The HTML output has been visually redesigned.
5790 * Markdown is now powered by hoedown instead of sundown.
5791 * Searching heuristics have been greatly improved.
5792 * The search index has been reduced in size by a great amount.
5793 * Cross-crate documentation via `pub use` has been greatly improved.
5794 * Primitive types are now hyperlinked and documented.
5795 * Documentation has been moved from static.rust-lang.org/doc to
5797 * A new sandbox, play.rust-lang.org, is available for running and
5798 sharing rust code examples on-line.
5799 * Unused attributes are now more robustly warned about.
5800 * The dead_code lint now warns about unused struct fields.
5801 * Cross-compiling to iOS is now supported.
5802 * Cross-compiling to mipsel is now supported.
5803 * Stability attributes are now inherited by default and no longer apply
5804 to intra-crate usage, only inter-crate usage.
5805 * Error message related to non-exhaustive match expressions have been
5809 Version 0.10 (2014-04-03)
5810 =========================
5812 * ~1500 changes, numerous bugfixes
5815 * A new RFC process is now in place for modifying the language.
5816 * Patterns with `@`-pointers have been removed from the language.
5817 * Patterns with unique vectors (`~[T]`) have been removed from the
5819 * Patterns with unique strings (`~str`) have been removed from the
5821 * `@str` has been removed from the language.
5822 * `@[T]` has been removed from the language.
5823 * `@self` has been removed from the language.
5824 * `@Trait` has been removed from the language.
5825 * Headers on `~` allocations which contain `@` boxes inside the type for
5826 reference counting have been removed.
5827 * The semantics around the lifetimes of temporary expressions have changed,
5828 see #3511 and #11585 for more information.
5829 * Cross-crate syntax extensions are now possible, but feature gated. See
5830 #11151 for more information. This includes both `macro_rules!` macros as
5831 well as syntax extensions such as `format!`.
5832 * New lint modes have been added, and older ones have been turned on to be
5834 * Unnecessary parentheses
5837 * Uppercase variables
5838 * Publicly visible private types
5839 * `#[deriving]` with raw pointers
5840 * Unsafe functions can no longer be coerced to closures.
5841 * Various obscure macros such as `log_syntax!` are now behind feature gates.
5842 * The `#[simd]` attribute is now behind a feature gate.
5843 * Visibility is no longer allowed on `extern crate` statements, and
5844 unnecessary visibility (`priv`) is no longer allowed on `use` statements.
5845 * Trailing commas are now allowed in argument lists and tuple patterns.
5846 * The `do` keyword has been removed, it is now a reserved keyword.
5847 * Default type parameters have been implemented, but are feature gated.
5848 * Borrowed variables through captures in closures are now considered soundly.
5849 * `extern mod` is now `extern crate`
5850 * The `Freeze` trait has been removed.
5851 * The `Share` trait has been added for types that can be shared among
5853 * Labels in macros are now hygienic.
5854 * Expression/statement macro invocations can be delimited with `{}` now.
5855 * Treatment of types allowed in `static mut` locations has been tweaked.
5856 * The `*` and `.` operators are now overloadable through the `Deref` and
5858 * `~Trait` and `proc` no longer have `Send` bounds by default.
5859 * Partial type hints are now supported with the `_` type marker.
5860 * An `Unsafe` type was introduced for interior mutability. It is now
5861 considered undefined to transmute from `&T` to `&mut T` without using the
5863 * The #[linkage] attribute was implemented for extern statics/functions.
5864 * The inner attribute syntax has changed from `#[foo];` to `#![foo]`.
5865 * `Pod` was renamed to `Copy`.
5868 * The `libextra` library has been removed. It has now been decomposed into
5869 component libraries with smaller and more focused nuggets of
5870 functionality. The full list of libraries can be found on the
5871 documentation index page.
5872 * std: `std::condition` has been removed. All I/O errors are now propagated
5873 through the `Result` type. In order to assist with error handling, a
5874 `try!` macro for unwrapping errors with an early return and a lint for
5875 unused results has been added. See #12039 for more information.
5876 * std: The `vec` module has been renamed to `slice`.
5877 * std: A new vector type, `Vec<T>`, has been added in preparation for DST.
5878 This will become the only growable vector in the future.
5879 * std: `std::io` now has more public re-exports. Types such as `BufferedReader`
5880 are now found at `std::io::BufferedReader` instead of
5881 `std::io::buffered::BufferedReader`.
5882 * std: `print` and `println` are no longer in the prelude, the `print!` and
5883 `println!` macros are intended to be used instead.
5884 * std: `Rc` now has a `Weak` pointer for breaking cycles, and it no longer
5885 attempts to statically prevent cycles.
5886 * std: The standard distribution is adopting the policy of pushing failure
5887 to the user rather than failing in libraries. Many functions (such as
5888 `slice::last()`) now return `Option<T>` instead of `T` + failing.
5889 * std: `fmt::Default` has been renamed to `fmt::Show`, and it now has a new
5890 deriving mode: `#[deriving(Show)]`.
5891 * std: `ToStr` is now implemented for all types implementing `Show`.
5892 * std: The formatting trait methods now take `&self` instead of `&T`
5893 * std: The `invert()` method on iterators has been renamed to `rev()`
5894 * std: `std::num` has seen a reduction in the genericity of its traits,
5895 consolidating functionality into a few core traits.
5896 * std: Backtraces are now printed on task failure if the environment
5897 variable `RUST_BACKTRACE` is present.
5898 * std: Naming conventions for iterators have been standardized. More details
5899 can be found on the wiki's style guide.
5900 * std: `eof()` has been removed from the `Reader` trait. Specific types may
5901 still implement the function.
5902 * std: Networking types are now cloneable to allow simultaneous reads/writes.
5903 * std: `assert_approx_eq!` has been removed
5904 * std: The `e` and `E` formatting specifiers for floats have been added to
5905 print them in exponential notation.
5906 * std: The `Times` trait has been removed
5907 * std: Indications of variance and opting out of builtin bounds is done
5908 through marker types in `std::kinds::marker` now
5909 * std: `hash` has been rewritten, `IterBytes` has been removed, and
5910 `#[deriving(Hash)]` is now possible.
5911 * std: `SharedChan` has been removed, `Sender` is now cloneable.
5912 * std: `Chan` and `Port` were renamed to `Sender` and `Receiver`.
5913 * std: `Chan::new` is now `channel()`.
5914 * std: A new synchronous channel type has been implemented.
5915 * std: A `select!` macro is now provided for selecting over `Receiver`s.
5916 * std: `hashmap` and `trie` have been moved to `libcollections`
5917 * std: `run` has been rolled into `io::process`
5918 * std: `assert_eq!` now uses `{}` instead of `{:?}`
5919 * std: The equality and comparison traits have seen some reorganization.
5920 * std: `rand` has moved to `librand`.
5921 * std: `to_{lower,upper}case` has been implemented for `char`.
5922 * std: Logging has been moved to `liblog`.
5923 * collections: `HashMap` has been rewritten for higher performance and less
5925 * native: The default runtime is now `libnative`. If `libgreen` is desired,
5926 it can be booted manually. The runtime guide has more information and
5928 * native: All I/O functionality except signals has been implemented.
5929 * green: Task spawning with `libgreen` has been optimized with stack caching
5930 and various trimming of code.
5931 * green: Tasks spawned by `libgreen` now have an unmapped guard page.
5932 * sync: The `extra::sync` module has been updated to modern rust (and moved
5933 to the `sync` library), tweaking and improving various interfaces while
5934 dropping redundant functionality.
5935 * sync: A new `Barrier` type has been added to the `sync` library.
5936 * sync: An efficient mutex for native and green tasks has been implemented.
5937 * serialize: The `base64` module has seen some improvement. It treats
5938 newlines better, has non-string error values, and has seen general
5940 * fourcc: A `fourcc!` macro was introduced
5941 * hexfloat: A `hexfloat!` macro was implemented for specifying floats via a
5942 hexadecimal literal.
5945 * `rustpkg` has been deprecated and removed from the main repository. Its
5946 replacement, `cargo`, is under development.
5947 * Nightly builds of rust are now available
5948 * The memory usage of rustc has been improved many times throughout this
5950 * The build process supports disabling rpath support for the rustc binary
5952 * Code generation has improved in some cases, giving more information to the
5953 LLVM optimization passes to enable more extensive optimizations.
5954 * Debuginfo compatibility with lldb on OSX has been restored.
5955 * The master branch is now gated on an android bot, making building for
5956 android much more reliable.
5957 * Output flags have been centralized into one `--emit` flag.
5958 * Crate type flags have been centralized into one `--crate-type` flag.
5959 * Codegen flags have been consolidated behind a `-C` flag.
5960 * Linking against outdated crates now has improved error messages.
5961 * Error messages with lifetimes will often suggest how to annotate the
5962 function to fix the error.
5963 * Many more types are documented in the standard library, and new guides
5965 * Many `rustdoc` improvements:
5966 * code blocks are syntax highlighted.
5967 * render standalone markdown files.
5968 * the --test flag tests all code blocks by default.
5969 * exported macros are displayed.
5970 * re-exported types have their documentation inlined at the location of the
5972 * search works across crates that have been rendered to the same output
5976 Version 0.9 (2014-01-09)
5977 ==========================
5979 * ~1800 changes, numerous bugfixes
5982 * The `float` type has been removed. Use `f32` or `f64` instead.
5983 * A new facility for enabling experimental features (feature gating) has
5984 been added, using the crate-level `#[feature(foo)]` attribute.
5985 * Managed boxes (@) are now behind a feature gate
5986 (`#[feature(managed_boxes)]`) in preparation for future removal. Use the
5987 standard library's `Gc` or `Rc` types instead.
5988 * `@mut` has been removed. Use `std::cell::{Cell, RefCell}` instead.
5989 * Jumping back to the top of a loop is now done with `continue` instead of
5991 * Strings can no longer be mutated through index assignment.
5992 * Raw strings can be created via the basic `r"foo"` syntax or with matched
5993 hash delimiters, as in `r###"foo"###`.
5994 * `~fn` is now written `proc (args) -> retval { ... }` and may only be
5996 * The `&fn` type is now written `|args| -> ret` to match the literal form.
5997 * `@fn`s have been removed.
5998 * `do` only works with procs in order to make it obvious what the cost
6000 * Single-element tuple-like structs can no longer be dereferenced to
6001 obtain the inner value. A more comprehensive solution for overloading
6002 the dereference operator will be provided in the future.
6003 * The `#[link(...)]` attribute has been replaced with
6004 `#[crate_id = "name#vers"]`.
6005 * Empty `impl`s must be terminated with empty braces and may not be
6006 terminated with a semicolon.
6007 * Keywords are no longer allowed as lifetime names; the `self` lifetime
6008 no longer has any special meaning.
6009 * The old `fmt!` string formatting macro has been removed.
6010 * `printf!` and `printfln!` (old-style formatting) removed in favor of
6011 `print!` and `println!`.
6012 * `mut` works in patterns now, as in `let (mut x, y) = (1, 2);`.
6013 * The `extern mod foo (name = "bar")` syntax has been removed. Use
6014 `extern mod foo = "bar"` instead.
6015 * New reserved keywords: `alignof`, `offsetof`, `sizeof`.
6016 * Macros can have attributes.
6017 * Macros can expand to items with attributes.
6018 * Macros can expand to multiple items.
6019 * The `asm!` macro is feature-gated (`#[feature(asm)]`).
6020 * Comments may be nested.
6021 * Values automatically coerce to trait objects they implement, without
6023 * Enum discriminants are no longer an entire word but as small as needed to
6024 contain all the variants. The `repr` attribute can be used to override
6025 the discriminant size, as in `#[repr(int)]` for integer-sized, and
6026 `#[repr(C)]` to match C enums.
6027 * Non-string literals are not allowed in attributes (they never worked).
6028 * The FFI now supports variadic functions.
6029 * Octal numeric literals, as in `0o7777`.
6030 * The `concat!` syntax extension performs compile-time string concatenation.
6031 * The `#[fixed_stack_segment]` and `#[rust_stack]` attributes have been
6032 removed as Rust no longer uses segmented stacks.
6033 * Non-ascii identifiers are feature-gated (`#[feature(non_ascii_idents)]`).
6034 * Ignoring all fields of an enum variant or tuple-struct is done with `..`,
6035 not `*`; ignoring remaining fields of a struct is also done with `..`,
6036 not `_`; ignoring a slice of a vector is done with `..`, not `.._`.
6037 * `rustc` supports the "win64" calling convention via `extern "win64"`.
6038 * `rustc` supports the "system" calling convention, which defaults to the
6039 preferred convention for the target platform, "stdcall" on 32-bit Windows,
6041 * The `type_overflow` lint (default: warn) checks literals for overflow.
6042 * The `unsafe_block` lint (default: allow) checks for usage of `unsafe`.
6043 * The `attribute_usage` lint (default: warn) warns about unknown
6045 * The `unknown_features` lint (default: warn) warns about unknown
6047 * The `dead_code` lint (default: warn) checks for dead code.
6048 * Rust libraries can be linked statically to one another
6049 * `#[link_args]` is behind the `link_args` feature gate.
6050 * Native libraries are now linked with `#[link(name = "foo")]`
6051 * Native libraries can be statically linked to a rust crate
6052 (`#[link(name = "foo", kind = "static")]`).
6053 * Native OS X frameworks are now officially supported
6054 (`#[link(name = "foo", kind = "framework")]`).
6055 * The `#[thread_local]` attribute creates thread-local (not task-local)
6056 variables. Currently behind the `thread_local` feature gate.
6057 * The `return` keyword may be used in closures.
6058 * Types that can be copied via a memcpy implement the `Pod` kind.
6059 * The `cfg` attribute can now be used on struct fields and enum variants.
6062 * std: The `option` and `result` API's have been overhauled to make them
6063 simpler, more consistent, and more composable.
6064 * std: The entire `std::io` module has been replaced with one that is
6065 more comprehensive and that properly interfaces with the underlying
6066 scheduler. File, TCP, UDP, Unix sockets, pipes, and timers are all
6068 * std: `io::util` contains a number of useful implementations of
6069 `Reader` and `Writer`, including `NullReader`, `NullWriter`,
6070 `ZeroReader`, `TeeReader`.
6071 * std: The reference counted pointer type `extra::rc` moved into std.
6072 * std: The `Gc` type in the `gc` module will replace `@` (it is currently
6073 just a wrapper around it).
6074 * std: The `Either` type has been removed.
6075 * std: `fmt::Default` can be implemented for any type to provide default
6076 formatting to the `format!` macro, as in `format!("{}", myfoo)`.
6077 * std: The `rand` API continues to be tweaked.
6078 * std: The `rust_begin_unwind` function, useful for inserting breakpoints
6079 on failure in gdb, is now named `rust_fail`.
6080 * std: The `each_key` and `each_value` methods on `HashMap` have been
6081 replaced by the `keys` and `values` iterators.
6082 * std: Functions dealing with type size and alignment have moved from the
6083 `sys` module to the `mem` module.
6084 * std: The `path` module was written and API changed.
6085 * std: `str::from_utf8` has been changed to cast instead of allocate.
6086 * std: `starts_with` and `ends_with` methods added to vectors via the
6087 `ImmutableEqVector` trait, which is in the prelude.
6088 * std: Vectors can be indexed with the `get_opt` method, which returns `None`
6089 if the index is out of bounds.
6090 * std: Task failure no longer propagates between tasks, as the model was
6091 complex, expensive, and incompatible with thread-based tasks.
6092 * std: The `Any` type can be used for dynamic typing.
6093 * std: `~Any` can be passed to the `fail!` macro and retrieved via
6095 * std: Methods that produce iterators generally do not have an `_iter`
6097 * std: `cell::Cell` and `cell::RefCell` can be used to introduce mutability
6098 roots (mutable fields, etc.). Use instead of e.g. `@mut`.
6099 * std: `util::ignore` renamed to `prelude::drop`.
6100 * std: Slices have `sort` and `sort_by` methods via the `MutableVector`
6102 * std: `vec::raw` has seen a lot of cleanup and API changes.
6103 * std: The standard library no longer includes any C++ code, and very
6104 minimal C, eliminating the dependency on libstdc++.
6105 * std: Runtime scheduling and I/O functionality has been factored out into
6106 extensible interfaces and is now implemented by two different crates:
6107 libnative, for native threading and I/O; and libgreen, for green threading
6108 and I/O. This paves the way for using the standard library in more limited
6109 embedded environments.
6110 * std: The `comm` module has been rewritten to be much faster, have a
6111 simpler, more consistent API, and to work for both native and green
6113 * std: All libuv dependencies have been moved into the rustuv crate.
6114 * native: New implementations of runtime scheduling on top of OS threads.
6115 * native: New native implementations of TCP, UDP, file I/O, process spawning,
6117 * green: The green thread scheduler and message passing types are almost
6119 * extra: The `flatpipes` module had bitrotted and was removed.
6120 * extra: All crypto functions have been removed and Rust now has a policy of
6121 not reimplementing crypto in the standard library. In the future crypto
6122 will be provided by external crates with bindings to established libraries.
6123 * extra: `c_vec` has been modernized.
6124 * extra: The `sort` module has been removed. Use the `sort` method on
6128 * The `rust` and `rusti` commands have been removed, due to lack of
6130 * `rustdoc` was completely rewritten.
6131 * `rustdoc` can test code examples in documentation.
6132 * `rustpkg` can test packages with the argument, 'test'.
6133 * `rustpkg` supports arbitrary dependencies, including C libraries.
6134 * `rustc`'s support for generating debug info is improved again.
6135 * `rustc` has better error reporting for unbalanced delimiters.
6136 * `rustc`'s JIT support was removed due to bitrot.
6137 * Executables and static libraries can be built with LTO (-Z lto)
6138 * `rustc` adds a `--dep-info` flag for communicating dependencies to
6142 Version 0.8 (2013-09-26)
6143 ============================
6145 * ~2200 changes, numerous bugfixes
6148 * The `for` loop syntax has changed to work with the `Iterator` trait.
6149 * At long last, unwinding works on Windows.
6150 * Default methods are ready for use.
6151 * Many trait inheritance bugs fixed.
6152 * Owned and borrowed trait objects work more reliably.
6153 * `copy` is no longer a keyword. It has been replaced by the `Clone` trait.
6154 * rustc can omit emission of code for the `debug!` macro if it is passed
6156 * mod.rs is now "blessed". When loading `mod foo;`, rustc will now look
6157 for foo.rs, then foo/mod.rs, and will generate an error when both are
6159 * Strings no longer contain trailing nulls. The new `std::c_str` module
6160 provides new mechanisms for converting to C strings.
6161 * The type of foreign functions is now `extern "C" fn` instead of `*u8'.
6162 * The FFI has been overhauled such that foreign functions are called directly,
6163 instead of through a stack-switching wrapper.
6164 * Calling a foreign function must be done through a Rust function with the
6165 `#[fixed_stack_segment]` attribute.
6166 * The `externfn!` macro can be used to declare both a foreign function and
6167 a `#[fixed_stack_segment]` wrapper at once.
6168 * `pub` and `priv` modifiers on `extern` blocks are no longer parsed.
6169 * `unsafe` is no longer allowed on extern fns - they are all unsafe.
6170 * `priv` is disallowed everywhere except for struct fields and enum variants.
6171 * `&T` (besides `&'static T`) is no longer allowed in `@T`.
6172 * `ref` bindings in irrefutable patterns work correctly now.
6173 * `char` is now prevented from containing invalid code points.
6174 * Casting to `bool` is no longer allowed.
6175 * `\0` is now accepted as an escape in chars and strings.
6176 * `yield` is a reserved keyword.
6177 * `typeof` is a reserved keyword.
6178 * Crates may be imported by URL with `extern mod foo = "url";`.
6179 * Explicit enum discriminants may be given as uints as in `enum E { V = 0u }`
6180 * Static vectors can be initialized with repeating elements,
6181 e.g. `static foo: [u8, .. 100]: [0, .. 100];`.
6182 * Static structs can be initialized with functional record update,
6183 e.g. `static foo: Foo = Foo { a: 5, .. bar };`.
6184 * `cfg!` can be used to conditionally execute code based on the crate
6185 configuration, similarly to `#[cfg(...)]`.
6186 * The `unnecessary_qualification` lint detects unneeded module
6187 prefixes (default: allow).
6188 * Arithmetic operations have been implemented on the SIMD types in
6189 `std::unstable::simd`.
6190 * Exchange allocation headers were removed, reducing memory usage.
6191 * `format!` implements a completely new, extensible, and higher-performance
6192 string formatting system. It will replace `fmt!`.
6193 * `print!` and `println!` write formatted strings (using the `format!`
6194 extension) to stdout.
6195 * `write!` and `writeln!` write formatted strings (using the `format!`
6196 extension) to the new Writers in `std::rt::io`.
6197 * The library section in which a function or static is placed may
6198 be specified with `#[link_section = "..."]`.
6199 * The `proto!` syntax extension for defining bounded message protocols
6201 * `macro_rules!` is hygienic for `let` declarations.
6202 * The `#[export_name]` attribute specifies the name of a symbol.
6203 * `unreachable!` can be used to indicate unreachable code, and fails
6207 * std: Transitioned to the new runtime, written in Rust.
6208 * std: Added an experimental I/O library, `rt::io`, based on the new
6210 * std: A new generic `range` function was added to the prelude, replacing
6211 `uint::range` and friends.
6212 * std: `range_rev` no longer exists. Since range is an iterator it can be
6213 reversed with `range(lo, hi).invert()`.
6214 * std: The `chain` method on option renamed to `and_then`; `unwrap_or_default`
6215 renamed to `unwrap_or`.
6216 * std: The `iterator` module was renamed to `iter`.
6217 * std: Integral types now support the `checked_add`, `checked_sub`, and
6218 `checked_mul` operations for detecting overflow.
6219 * std: Many methods in `str`, `vec`, `option, `result` were renamed for
6221 * std: Methods are standardizing on conventions for casting methods:
6222 `to_foo` for copying, `into_foo` for moving, `as_foo` for temporary
6224 * std: The `CString` type in `c_str` provides new ways to convert to and
6226 * std: `DoubleEndedIterator` can yield elements in two directions.
6227 * std: The `mut_split` method on vectors partitions an `&mut [T]` into
6229 * std: `str::from_bytes` renamed to `str::from_utf8`.
6230 * std: `pop_opt` and `shift_opt` methods added to vectors.
6231 * std: The task-local data interface no longer uses @, and keys are
6232 no longer function pointers.
6233 * std: The `swap_unwrap` method of `Option` renamed to `take_unwrap`.
6234 * std: Added `SharedPort` to `comm`.
6235 * std: `Eq` has a default method for `ne`; only `eq` is required
6237 * std: `Ord` has default methods for `le`, `gt` and `ge`; only `lt`
6238 is required in implementations.
6239 * std: `is_utf8` performance is improved, impacting many string functions.
6240 * std: `os::MemoryMap` provides cross-platform mmap.
6241 * std: `ptr::offset` is now unsafe, but also more optimized. Offsets that
6242 are not 'in-bounds' are considered undefined.
6243 * std: Many freestanding functions in `vec` removed in favor of methods.
6244 * std: Many freestanding functions on scalar types removed in favor of
6246 * std: Many options to task builders were removed since they don't make
6247 sense in the new scheduler design.
6248 * std: More containers implement `FromIterator` so can be created by the
6250 * std: More complete atomic types in `unstable::atomics`.
6251 * std: `comm::PortSet` removed.
6252 * std: Mutating methods in the `Set` and `Map` traits have been moved into
6253 the `MutableSet` and `MutableMap` traits. `Container::is_empty`,
6254 `Map::contains_key`, `MutableMap::insert`, and `MutableMap::remove` have
6255 default implementations.
6256 * std: Various `from_str` functions were removed in favor of a generic
6257 `from_str` which is available in the prelude.
6258 * std: `util::unreachable` removed in favor of the `unreachable!` macro.
6259 * extra: `dlist`, the doubly-linked list was modernized.
6260 * extra: Added a `hex` module with `ToHex` and `FromHex` traits.
6261 * extra: Added `glob` module, replacing `std::os::glob`.
6262 * extra: `rope` was removed.
6263 * extra: `deque` was renamed to `ringbuf`. `RingBuf` implements `Deque`.
6264 * extra: `net`, and `timer` were removed. The experimental replacements
6265 are `std::rt::io::net` and `std::rt::io::timer`.
6266 * extra: Iterators implemented for `SmallIntMap`.
6267 * extra: Iterators implemented for `Bitv` and `BitvSet`.
6268 * extra: `SmallIntSet` removed. Use `BitvSet`.
6269 * extra: Performance of JSON parsing greatly improved.
6270 * extra: `semver` updated to SemVer 2.0.0.
6271 * extra: `term` handles more terminals correctly.
6272 * extra: `dbg` module removed.
6273 * extra: `par` module removed.
6274 * extra: `future` was cleaned up, with some method renames.
6275 * extra: Most free functions in `getopts` were converted to methods.
6278 * rustc's debug info generation (`-Z debug-info`) is greatly improved.
6279 * rustc accepts `--target-cpu` to compile to a specific CPU architecture,
6280 similarly to gcc's `--march` flag.
6281 * rustc's performance compiling small crates is much better.
6282 * rustpkg has received many improvements.
6283 * rustpkg supports git tags as package IDs.
6284 * rustpkg builds into target-specific directories so it can be used for
6286 * The number of concurrent test tasks is controlled by the environment
6287 variable RUST_TEST_TASKS.
6288 * The test harness can now report metrics for benchmarks.
6289 * All tools have man pages.
6290 * Programs compiled with `--test` now support the `-h` and `--help` flags.
6291 * The runtime uses jemalloc for allocations.
6292 * Segmented stacks are temporarily disabled as part of the transition to
6293 the new runtime. Stack overflows are possible!
6294 * A new documentation backend, rustdoc_ng, is available for use. It is
6295 still invoked through the normal `rustdoc` command.
6298 Version 0.7 (2013-07-03)
6299 =======================
6301 * ~2000 changes, numerous bugfixes
6304 * `impl`s no longer accept a visibility qualifier. Put them on methods
6306 * The borrow checker has been rewritten with flow-sensitivity, fixing
6307 many bugs and inconveniences.
6308 * The `self` parameter no longer implicitly means `&'self self`,
6309 and can be explicitly marked with a lifetime.
6310 * Overloadable compound operators (`+=`, etc.) have been temporarily
6311 removed due to bugs.
6312 * The `for` loop protocol now requires `for`-iterators to return `bool`
6313 so they compose better.
6314 * The `Durable` trait is replaced with the `'static` bounds.
6315 * Trait default methods work more often.
6316 * Structs with the `#[packed]` attribute have byte alignment and
6317 no padding between fields.
6318 * Type parameters bound by `Copy` must now be copied explicitly with
6320 * It is now illegal to move out of a dereferenced unsafe pointer.
6321 * `Option<~T>` is now represented as a nullable pointer.
6322 * `@mut` does dynamic borrow checks correctly.
6323 * The `main` function is only detected at the topmost level of the crate.
6324 The `#[main]` attribute is still valid anywhere.
6325 * Struct fields may no longer be mutable. Use inherited mutability.
6326 * The `#[no_send]` attribute makes a type that would otherwise be
6328 * The `#[no_freeze]` attribute makes a type that would otherwise be
6330 * Unbounded recursion will abort the process after reaching the limit
6331 specified by the `RUST_MAX_STACK` environment variable (default: 1GB).
6332 * The `vecs_implicitly_copyable` lint mode has been removed. Vectors
6333 are never implicitly copyable.
6334 * `#[static_assert]` makes compile-time assertions about static bools.
6335 * At long last, 'argument modes' no longer exist.
6336 * The rarely used `use mod` statement no longer exists.
6339 * `fail!` and `assert!` accept `~str`, `&'static str` or `fmt!`-style
6341 * `Encodable`, `Decodable`, `Ord`, `TotalOrd`, `TotalEq`, `DeepClone`,
6342 `Rand`, `Zero` and `ToStr` can all be automatically derived with
6344 * The `bytes!` macro returns a vector of bytes for string, u8, char,
6345 and unsuffixed integer literals.
6348 * The `core` crate was renamed to `std`.
6349 * The `std` crate was renamed to `extra`.
6350 * More and improved documentation.
6351 * std: `iterator` module for external iterator objects.
6352 * Many old-style (internal, higher-order function) iterators replaced by
6353 implementations of `Iterator`.
6354 * std: Many old internal vector and string iterators,
6355 incl. `any`, `all`. removed.
6356 * std: The `finalize` method of `Drop` renamed to `drop`.
6357 * std: The `drop` method now takes `&mut self` instead of `&self`.
6358 * std: The prelude no longer re-exports any modules, only types and traits.
6359 * std: Prelude additions: `print`, `println`, `FromStr`, `ApproxEq`, `Equiv`,
6360 `Iterator`, `IteratorUtil`, many numeric traits, many tuple traits.
6361 * std: New numeric traits: `Fractional`, `Real`, `RealExt`, `Integer`, `Ratio`,
6362 `Algebraic`, `Trigonometric`, `Exponential`, `Primitive`.
6363 * std: Tuple traits and accessors defined for up to 12-tuples, e.g.
6364 `(0, 1, 2).n2()` or `(0, 1, 2).n2_ref()`.
6365 * std: Many types implement `Clone`.
6366 * std: `path` type renamed to `Path`.
6367 * std: `mut` module and `Mut` type removed.
6368 * std: Many standalone functions removed in favor of methods and iterators
6369 in `vec`, `str`. In the future methods will also work as functions.
6370 * std: `reinterpret_cast` removed. Use `transmute`.
6371 * std: ascii string handling in `std::ascii`.
6372 * std: `Rand` is implemented for ~/@.
6373 * std: `run` module for spawning processes overhauled.
6374 * std: Various atomic types added to `unstable::atomic`.
6375 * std: Various types implement `Zero`.
6376 * std: `LinearMap` and `LinearSet` renamed to `HashMap` and `HashSet`.
6377 * std: Borrowed pointer functions moved from `ptr` to `borrow`.
6378 * std: Added `os::mkdir_recursive`.
6379 * std: Added `os::glob` function performs filesystems globs.
6380 * std: `FuzzyEq` renamed to `ApproxEq`.
6381 * std: `Map` now defines `pop` and `swap` methods.
6382 * std: `Cell` constructors converted to static methods.
6383 * extra: `rc` module adds the reference counted pointers, `Rc` and `RcMut`.
6384 * extra: `flate` module moved from `std` to `extra`.
6385 * extra: `fileinput` module for iterating over a series of files.
6386 * extra: `Complex` number type and `complex` module.
6387 * extra: `Rational` number type and `rational` module.
6388 * extra: `BigInt`, `BigUint` implement numeric and comparison traits.
6389 * extra: `term` uses terminfo now, is more correct.
6390 * extra: `arc` functions converted to methods.
6391 * extra: Implementation of fixed output size variations of SHA-2.
6394 * `unused_variable` lint mode for unused variables (default: warn).
6395 * `unused_unsafe` lint mode for detecting unnecessary `unsafe` blocks
6397 * `unused_mut` lint mode for identifying unused `mut` qualifiers
6399 * `dead_assignment` lint mode for unread variables (default: warn).
6400 * `unnecessary_allocation` lint mode detects some heap allocations that are
6401 immediately borrowed so could be written without allocating (default: warn).
6402 * `missing_doc` lint mode (default: allow).
6403 * `unreachable_code` lint mode (default: warn).
6404 * The `rusti` command has been rewritten and a number of bugs addressed.
6405 * rustc outputs in color on more terminals.
6406 * rustc accepts a `--link-args` flag to pass arguments to the linker.
6407 * rustc accepts a `-Z print-link-args` flag for debugging linkage.
6408 * Compiling with `-g` will make the binary record information about
6409 dynamic borrowcheck failures for debugging.
6410 * rustdoc has a nicer stylesheet.
6411 * Various improvements to rustdoc.
6412 * Improvements to rustpkg (see the detailed release notes).
6415 Version 0.6 (2013-04-03)
6416 ========================
6418 * ~2100 changes, numerous bugfixes
6421 * The self type parameter in traits is now spelled `Self`
6422 * The `self` parameter in trait and impl methods must now be explicitly
6423 named (for example: `fn f(&self) { }`). Implicit self is deprecated.
6424 * Static methods no longer require the `static` keyword and instead
6425 are distinguished by the lack of a `self` parameter
6426 * Replaced the `Durable` trait with the `'static` lifetime
6427 * The old closure type syntax with the trailing sigil has been
6428 removed in favor of the more consistent leading sigil
6429 * `super` is a keyword, and may be prefixed to paths
6430 * Trait bounds are separated with `+` instead of whitespace
6431 * Traits are implemented with `impl Trait for Type`
6432 instead of `impl Type: Trait`
6433 * Lifetime syntax is now `&'l foo` instead of `&l/foo`
6434 * The `export` keyword has finally been removed
6435 * The `move` keyword has been removed (see "Semantic changes")
6436 * The interior mutability qualifier on vectors, `[mut T]`, has been
6437 removed. Use `&mut [T]`, etc.
6438 * `mut` is no longer valid in `~mut T`. Use inherited mutability
6439 * `fail` is no longer a keyword. Use `fail!()`
6440 * `assert` is no longer a keyword. Use `assert!()`
6441 * `log` is no longer a keyword. use `debug!`, etc.
6442 * 1-tuples may be represented as `(T,)`
6443 * Struct fields may no longer be `mut`. Use inherited mutability,
6444 `@mut T`, `core::mut` or `core::cell`
6445 * `extern mod { ... }` is no longer valid syntax for foreign
6446 function modules. Use extern blocks: `extern { ... }`
6447 * Newtype enums removed. Use tuple-structs.
6448 * Trait implementations no longer support visibility modifiers
6449 * Pattern matching over vectors improved and expanded
6450 * `const` renamed to `static` to correspond to lifetime name,
6451 and make room for future `static mut` unsafe mutable globals.
6452 * Replaced `#[deriving_eq]` with `#[deriving(Eq)]`, etc.
6453 * `Clone` implementations can be automatically generated with
6454 `#[deriving(Clone)]`
6455 * Casts to traits must use a pointer sigil, e.g. `@foo as @Bar`
6456 instead of `foo as Bar`.
6457 * Fixed length vector types are now written as `[int, .. 3]`
6458 instead of `[int * 3]`.
6459 * Fixed length vector types can express the length as a constant
6460 expression. (ex: `[int, .. GL_BUFFER_SIZE - 2]`)
6463 * Types with owned pointers or custom destructors move by default,
6464 eliminating the `move` keyword
6465 * All foreign functions are considered unsafe
6466 * &mut is now unaliasable
6467 * Writes to borrowed @mut pointers are prevented dynamically
6469 * The name of the main function can be customized using #[main]
6470 * The default type of an inferred closure is &fn instead of @fn
6471 * `use` statements may no longer be "chained" - they cannot import
6472 identifiers imported by previous `use` statements
6473 * `use` statements are crate relative, importing from the "top"
6474 of the crate by default. Paths may be prefixed with `super::`
6475 or `self::` to change the search behavior.
6476 * Method visibility is inherited from the implementation declaration
6477 * Structural records have been removed
6478 * Many more types can be used in static items, including enums
6479 'static-lifetime pointers and vectors
6480 * Pattern matching over vectors improved and expanded
6481 * Typechecking of closure types has been overhauled to
6482 improve inference and eliminate unsoundness
6483 * Macros leave scope at the end of modules, unless that module is
6484 tagged with #[macro_escape]
6487 * Added big integers to `std::bigint`
6488 * Removed `core::oldcomm` module
6489 * Added pipe-based `core::comm` module
6490 * Numeric traits have been reorganized under `core::num`
6491 * `vec::slice` finally returns a slice
6492 * `debug!` and friends don't require a format string, e.g. `debug!(Foo)`
6493 * Containers reorganized around traits in `core::container`
6494 * `core::dvec` removed, `~[T]` is a drop-in replacement
6495 * `core::send_map` renamed to `core::hashmap`
6496 * `std::map` removed; replaced with `core::hashmap`
6497 * `std::treemap` reimplemented as an owned balanced tree
6498 * `std::deque` and `std::smallintmap` reimplemented as owned containers
6499 * `core::trie` added as a fast ordered map for integer keys
6500 * Set types added to `core::hashmap`, `core::trie` and `std::treemap`
6501 * `Ord` split into `Ord` and `TotalOrd`. `Ord` is still used to
6502 overload the comparison operators, whereas `TotalOrd` is used
6503 by certain container types
6506 * Replaced the 'cargo' package manager with 'rustpkg'
6507 * Added all-purpose 'rust' tool
6508 * `rustc --test` now supports benchmarks with the `#[bench]` attribute
6509 * rustc now *attempts* to offer spelling suggestions
6510 * Improved support for ARM and Android
6511 * Preliminary MIPS backend
6512 * Improved foreign function ABI implementation for x86, x86_64
6513 * Various memory usage improvements
6514 * Rust code may be embedded in foreign code under limited circumstances
6515 * Inline assembler supported by new asm!() syntax extension.
6518 Version 0.5 (2012-12-21)
6519 ===========================
6521 * ~900 changes, numerous bugfixes
6524 * Removed `<-` move operator
6525 * Completed the transition from the `#fmt` extension syntax to `fmt!`
6526 * Removed old fixed length vector syntax - `[T]/N`
6527 * New token-based quasi-quoters, `quote_tokens!`, `quote_expr!`, etc.
6528 * Macros may now expand to items and statements
6529 * `a.b()` is always parsed as a method call, never as a field projection
6530 * `Eq` and `IterBytes` implementations can be automatically generated
6531 with `#[deriving_eq]` and `#[deriving_iter_bytes]` respectively
6532 * Removed the special crate language for `.rc` files
6533 * Function arguments may consist of any irrefutable pattern
6536 * `&` and `~` pointers may point to objects
6537 * Tuple structs - `struct Foo(Bar, Baz)`. Will replace newtype enums.
6538 * Enum variants may be structs
6539 * Destructors can be added to all nominal types with the Drop trait
6540 * Structs and nullary enum variants may be constants
6541 * Values that cannot be implicitly copied are now automatically moved
6542 without writing `move` explicitly
6543 * `&T` may now be coerced to `*T`
6544 * Coercions happen in `let` statements as well as function calls
6545 * `use` statements now take crate-relative paths
6546 * The module and type namespaces have been merged so that static
6547 method names can be resolved under the trait in which they are
6550 * Improved support for language features
6551 * Trait inheritance works in many scenarios
6552 * More support for explicit self arguments in methods - `self`, `&self`
6553 `@self`, and `~self` all generally work as expected
6554 * Static methods work in more situations
6555 * Experimental: Traits may declare default methods for the implementations
6559 * New condition handling system in `core::condition`
6560 * Timsort added to `std::sort`
6561 * New priority queue, `std::priority_queue`
6562 * Pipes for serializable types, `std::flatpipes'
6563 * Serialization overhauled to be trait-based
6564 * Expanded `getopts` definitions
6565 * Moved futures to `std`
6566 * More functions are pure now
6567 * `core::comm` renamed to `oldcomm`. Still deprecated
6568 * `rustdoc` and `cargo` are libraries now
6571 * Added a preliminary REPL, `rusti`
6572 * License changed from MIT to dual MIT/APL2
6575 Version 0.4 (2012-10-15)
6576 ==========================
6578 * ~2000 changes, numerous bugfixes
6581 * All keywords are now strict and may not be used as identifiers anywhere
6582 * Keyword removal: 'again', 'import', 'check', 'new', 'owned', 'send',
6583 'of', 'with', 'to', 'class'.
6584 * Classes are replaced with simpler structs
6585 * Explicit method self types
6586 * `ret` became `return` and `alt` became `match`
6587 * `import` is now `use`; `use is now `extern mod`
6588 * `extern mod { ... }` is now `extern { ... }`
6589 * `use mod` is the recommended way to import modules
6590 * `pub` and `priv` replace deprecated export lists
6591 * The syntax of `match` pattern arms now uses fat arrow (=>)
6592 * `main` no longer accepts an args vector; use `os::args` instead
6595 * Trait implementations are now coherent, ala Haskell typeclasses
6596 * Trait methods may be static
6597 * Argument modes are deprecated
6598 * Borrowed pointers are much more mature and recommended for use
6599 * Strings and vectors in the static region are stored in constant memory
6600 * Typestate was removed
6601 * Resolution rewritten to be more reliable
6602 * Support for 'dual-mode' data structures (freezing and thawing)
6605 * Most binary operators can now be overloaded via the traits in
6607 * `std::net::url` for representing URLs
6608 * Sendable hash maps in `core::send_map`
6609 * `core::task' gained a (currently unsafe) task-local storage API
6612 * An efficient new intertask communication primitive called the pipe,
6613 along with a number of higher-level channel types, in `core::pipes`
6614 * `std::arc`, an atomically reference counted, immutable, shared memory
6616 * `std::sync`, various exotic synchronization tools based on arcs and pipes
6617 * Futures are now based on pipes and sendable
6618 * More robust linked task failure
6619 * Improved task builder API
6622 * Improved error reporting
6623 * Preliminary JIT support
6624 * Preliminary work on precise GC
6625 * Extensive architectural improvements to rustc
6626 * Begun a transition away from buggy C++-based reflection (shape) code to
6627 Rust-based (visitor) code
6628 * All hash functions and tables converted to secure, randomized SipHash
6631 Version 0.3 (2012-07-12)
6632 ========================
6634 * ~1900 changes, numerous bugfixes
6636 * New coding conveniences
6637 * Integer-literal suffix inference
6638 * Per-item control over warnings, errors
6639 * #[cfg(windows)] and #[cfg(unix)] attributes
6640 * Documentation comments
6641 * More compact closure syntax
6642 * 'do' expressions for treating higher-order functions as
6644 * *-patterns (wildcard extended to all constructor fields)
6647 * Name resolution pass and exhaustiveness checker rewritten
6648 * Region pointers and borrow checking supersede alias
6650 * Init-ness checking is now provided by a region-based liveness
6651 pass instead of the typestate pass; same for last-use analysis
6652 * Extensive work on region pointers
6654 * Experimental new language features
6655 * Slices and fixed-size, interior-allocated vectors
6656 * #!-comments for lang versioning, shell execution
6657 * Destructors and iface implementation for classes;
6658 type-parameterized classes and class methods
6659 * 'const' type kind for types that can be used to implement
6660 shared-memory concurrency patterns
6664 * Removal of various obsolete features
6665 * Keywords: 'be', 'prove', 'syntax', 'note', 'mutable', 'bind',
6666 'crust', 'native' (now 'extern'), 'cont' (now 'again')
6668 * Constructs: do-while loops ('do' repurposed), fn binding,
6669 resources (replaced by destructors)
6671 * Compiler reorganization
6672 * Syntax-layer of compiler split into separate crate
6673 * Clang (from LLVM project) integrated into build
6674 * Typechecker split into sub-modules
6677 * New time functions
6678 * Extension methods for many built-in types
6679 * Arc: atomic-refcount read-only / exclusive-use shared cells
6680 * Par: parallel map and search routines
6681 * Extensive work on libuv interface
6682 * Much vector code moved to libraries
6683 * Syntax extensions: #line, #col, #file, #mod, #stringify,
6684 #include, #include_str, #include_bin
6687 * Cargo automatically resolves dependencies
6690 Version 0.2 (2012-03-29)
6691 =========================
6693 * >1500 changes, numerous bugfixes
6695 * New docs and doc tooling
6697 * New port: FreeBSD x86_64
6699 * Compilation model enhancements
6700 * Generics now specialized, multiply instantiated
6701 * Functions now inlined across separate crates
6703 * Scheduling, stack and threading fixes
6704 * Noticeably improved message-passing performance
6705 * Explicit schedulers
6709 * Experimental new language features
6710 * Operator overloading
6714 * Various language extensions
6715 * C-callback function types: 'crust fn ...'
6716 * Infinite-loop construct: 'loop { ... }'
6717 * Shorten 'mutable' to 'mut'
6718 * Required mutable-local qualifier: 'let mut ...'
6719 * Basic glob-exporting: 'export foo::*;'
6720 * Alt now exhaustive, 'alt check' for runtime-checked
6721 * Block-function form of 'for' loop, with 'break' and 'ret'.
6724 * AST quasi-quote syntax extension
6725 * Revived libuv interface
6726 * New modules: core::{future, iter}, std::arena
6727 * Merged per-platform std::{os*, fs*} to core::{libc, os}
6728 * Extensive cleanup, regularization in libstd, libcore
6731 Version 0.1 (2012-01-20)
6732 ===============================
6734 * Most language features work, including:
6735 * Unique pointers, unique closures, move semantics
6736 * Interface-constrained generics
6737 * Static interface dispatch
6739 * Multithread task scheduling
6740 * Typestate predicates
6741 * Failure unwinding, destructors
6742 * Pattern matching and destructuring assignment
6743 * Lightweight block-lambda syntax
6744 * Preliminary macro-by-example
6746 * Compiler works with the following configurations:
6747 * Linux: x86 and x86_64 hosts and targets
6748 * macOS: x86 and x86_64 hosts and targets
6749 * Windows: x86 hosts and targets
6751 * Cross compilation / multi-target configuration supported.
6753 * Preliminary API-documentation and package-management tools included.
6757 * Documentation is incomplete.
6759 * Performance is below intended target.
6761 * Standard library APIs are subject to extensive change, reorganization.
6763 * Language-level versioning is not yet operational - future code will