1 Version 1.27.0 (2018-06-21)
2 ==========================
6 - [Removed 'proc' from the reserved keywords list.][49699] This allows `proc` to
7 be used as an identifer.
8 - [The dyn syntax is now available.][49968] This syntax is equivalent to the
9 bare `Trait` syntax, and should make it clearer when being used in tandem with
10 `impl Trait`. Since it is equivalent to the following syntax:
11 `&Trait == &dyn Trait`, `&mut Trait == &mut dyn Trait`, and
12 `Box<Trait> == Box<dyn Trait>`.
13 - [Attributes on generic parameters such as types and lifetimes are
14 now stable.][48851] e.g.
15 `fn foo<#[lifetime_attr] 'a, #[type_attr] T: 'a>() {}`
16 - [The `#[must_use]` attribute can now also be used on functions as well as
17 types.][48925] It provides a lint that by default warns users when the
18 value returned by a function has not been used.
22 - [Added the `armv5te-unknown-linux-musl` target.][50423]
26 - [SIMD (Single Instruction Multiple Data) on x86/x86_64 is now stable.][49664]
27 This includes [`arch::x86`] & [`arch::x86_64`] modules which contain
28 SIMD intrinsics, a new macro called `is_x86_feature_detected!`, the
29 `#[target_feature(enable="")]` attribute, and adding `target_feature = ""` to
31 - [A lot of methods for `[u8]`, `f32`, and `f64` previously only available in
32 std are now available in core.][49896]
33 - [The generic `Rhs` type parameter on `ops::{Shl, ShlAssign, Shr}` now defaults
35 - [`std::str::replace` now has the `#[must_use]` attribute][50177] to clarify
36 that the operation isn't done in place.
37 - [`Clone::clone`, `Iterator::collect`, and `ToOwned::to_owned` now have
38 the `#[must_use]` attribute][49533] to warn about unused potentially
39 expensive allocations.
43 - [`DoubleEndedIterator::rfind`]
44 - [`DoubleEndedIterator::rfold`]
45 - [`DoubleEndedIterator::try_rfold`]
46 - [`Duration::from_micros`]
47 - [`Duration::from_nanos`]
48 - [`Duration::subsec_micros`]
49 - [`Duration::subsec_millis`]
50 - [`HashMap::remove_entry`]
51 - [`Iterator::try_fold`]
52 - [`Iterator::try_for_each`]
55 - [`String::replace_range`]
57 - [`hint::unreachable_unchecked`]
58 - [`os::unix::process::parent_id`]
59 - [`ptr::swap_nonoverlapping`]
60 - [`slice::rsplit_mut`]
62 - [`slice::swap_with_slice`]
66 - [`cargo-metadata` now includes `authors`, `categories`, `keywords`,
67 `readme`, and `repository` fields.][cargo/5386]
68 - [`cargo-metadata` now includes a package's `metadata` table.][cargo/5360]
69 - [Added the `--target-dir` optional argument.][cargo/5393] This allows you to specify
70 a different directory than `target` for placing compilation artifacts.
71 - [Cargo will be adding automatic target inference for binaries, benchmarks,
72 examples, and tests in the Rust 2018 edition.][cargo/5335] If your project specifies
73 specific targets e.g. using `[[bin]]` and have other binaries in locations
74 where cargo would infer a binary, Cargo will produce a warning. You can
75 disable this feature ahead of time by setting any of the following `autobins`,
76 `autobenches`, `autoexamples`, `autotests` to false.
77 - [Cargo will now cache compiler information.][cargo/5359] This can be disabled by
78 setting `CARGO_CACHE_RUSTC_INFO=0` in your environment.
82 - [Added “The Rustc book” into the official documentation.][49707]
83 [“The Rustc book”] documents and teaches how to use the rustc compiler.
84 - [All books available on `doc.rust-lang.org` are now searchable.][49623]
88 - [Calling a `CharExt` or `StrExt` method directly on core will no longer
89 work.][49896] e.g. `::core::prelude::v1::StrExt::is_empty("")` will not
90 compile, `"".is_empty()` will still compile.
91 - [`Debug` output on `atomic::{AtomicBool, AtomicIsize, AtomicPtr, AtomicUsize}`
92 will only print the inner type.][48553] e.g.
93 `print!("{:?}", AtomicBool::new(true))` will print `true`
94 not `AtomicBool(true)`.
95 - [The maximum number for `repr(align(N))` is now 2²⁹.][50378] Previously you
96 could enter higher numbers but they were not supported by LLVM. Up to 512MB
97 alignment should cover all use cases.
99 [48553]: https://github.com/rust-lang/rust/pull/48553/
100 [48851]: https://github.com/rust-lang/rust/pull/48851/
101 [48925]: https://github.com/rust-lang/rust/pull/48925/
102 [49533]: https://github.com/rust-lang/rust/pull/49533/
103 [49623]: https://github.com/rust-lang/rust/pull/49623/
104 [49630]: https://github.com/rust-lang/rust/pull/49630/
105 [49664]: https://github.com/rust-lang/rust/pull/49664/
106 [49699]: https://github.com/rust-lang/rust/pull/49699/
107 [49707]: https://github.com/rust-lang/rust/pull/49707/
108 [49719]: https://github.com/rust-lang/rust/pull/49719/
109 [49896]: https://github.com/rust-lang/rust/pull/49896/
110 [49968]: https://github.com/rust-lang/rust/pull/49968/
111 [50177]: https://github.com/rust-lang/rust/pull/50177/
112 [50378]: https://github.com/rust-lang/rust/pull/50378/
113 [50398]: https://github.com/rust-lang/rust/pull/50398/
114 [50423]: https://github.com/rust-lang/rust/pull/50423/
115 [cargo/5203]: https://github.com/rust-lang/cargo/pull/5203/
116 [cargo/5335]: https://github.com/rust-lang/cargo/pull/5335/
117 [cargo/5359]: https://github.com/rust-lang/cargo/pull/5359/
118 [cargo/5360]: https://github.com/rust-lang/cargo/pull/5360/
119 [cargo/5386]: https://github.com/rust-lang/cargo/pull/5386/
120 [cargo/5393]: https://github.com/rust-lang/cargo/pull/5393/
121 [`DoubleEndedIterator::rfind`]: https://doc.rust-lang.org/std/iter/trait.DoubleEndedIterator.html#method.rfind
122 [`DoubleEndedIterator::rfold`]: https://doc.rust-lang.org/std/iter/trait.DoubleEndedIterator.html#method.rfold
123 [`DoubleEndedIterator::try_rfold`]: https://doc.rust-lang.org/std/iter/trait.DoubleEndedIterator.html#method.try_rfold
124 [`Duration::from_micros`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.from_micros
125 [`Duration::from_nanos`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.from_nanos
126 [`Duration::subsec_micros`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.subsec_micros
127 [`Duration::subsec_millis`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.subsec_millis
128 [`HashMap::remove_entry`]: https://doc.rust-lang.org/std/collections/struct.HashMap.html#method.remove_entry
129 [`Iterator::try_fold`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.try_fold
130 [`Iterator::try_for_each`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.try_for_each
131 [`NonNull::cast`]: https://doc.rust-lang.org/std/ptr/struct.NonNull.html#method.cast
132 [`Option::filter`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.filter
133 [`String::replace_range`]: https://doc.rust-lang.org/std/string/struct.String.html#method.replace_range
134 [`Take::set_limit`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.set_limit
135 [`hint::unreachable_unchecked`]: https://doc.rust-lang.org/std/hint/fn.unreachable_unchecked.html
136 [`os::unix::process::parent_id`]: https://doc.rust-lang.org/std/os/unix/process/fn.parent_id.html
137 [`process::id`]: https://doc.rust-lang.org/std/process/fn.id.html
138 [`ptr::swap_nonoverlapping`]: https://doc.rust-lang.org/std/ptr/fn.swap_nonoverlapping.html
139 [`slice::rsplit_mut`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rsplit_mut
140 [`slice::rsplit`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rsplit
141 [`slice::swap_with_slice`]: https://doc.rust-lang.org/std/primitive.slice.html#method.swap_with_slice
142 [`arch::x86_64`]: https://doc.rust-lang.org/std/arch/x86_64/index.html
143 [`arch::x86`]: https://doc.rust-lang.org/std/arch/x86/index.html
144 [“The Rustc book”]: https://doc.rust-lang.org/rustc
147 Version 1.26.2 (2018-06-05)
148 ==========================
153 - [The borrow checker was fixed to avoid unsoundness when using match ergonomics][51117]
155 [51117]: https://github.com/rust-lang/rust/issues/51117
158 Version 1.26.1 (2018-05-29)
159 ==========================
164 - [RLS now works on Windows][50646]
165 - [Rustfmt stopped badly formatting text in some cases][rustfmt/2695]
171 - [`fn main() -> impl Trait` no longer works for non-Termination
173 This reverts an accidental stabilization.
174 - [`NaN > NaN` no longer returns true in const-fn contexts][50812]
175 - [Prohibit using turbofish for `impl Trait` in method arguments][50950]
177 [50646]: https://github.com/rust-lang/rust/issues/50646
178 [50656]: https://github.com/rust-lang/rust/pull/50656
179 [50812]: https://github.com/rust-lang/rust/pull/50812
180 [50950]: https://github.com/rust-lang/rust/issues/50950
181 [rustfmt/2695]: https://github.com/rust-lang-nursery/rustfmt/issues/2695
183 Version 1.26.0 (2018-05-10)
184 ==========================
188 - [Closures now implement `Copy` and/or `Clone` if all captured variables
189 implement either or both traits.][49299]
190 - [The inclusive range syntax e.g. `for x in 0..=10` is now stable.][47813]
191 - [Stablise `'_`. The underscore lifetime can be used anywhere where a
192 lifetime can be elided.][49458]
193 - [`impl Trait` is now stable allowing you to have abstract types in returns
194 or in function parameters.][49255] e.g. `fn foo() -> impl Iterator<Item=u8>` or
195 `fn open(path: impl AsRef<Path>)`.
196 - [Pattern matching will now automatically apply dereferences.][49394]
197 - [128-bit integers in the form of `u128` and `i128` are now stable.][49101]
198 - [`main` can now return `Result<(), E: Debug>`][49162] in addition to `()`.
199 - [A lot of operations are now available in a const context.][46882] E.g. You
200 can now index into constant arrays, reference and dereference into constants,
201 and use Tuple struct constructors.
202 - [Fixed entry slice patterns are now stable.][48516] e.g.
204 let points = [1, 2, 3, 4];
206 [1, 2, 3, 4] => println!("All points were sequential."),
207 _ => println!("Not all points were sequential."),
214 - [LLD is now used as the default linker for `wasm32-unknown-unknown`.][48125]
215 - [Fixed exponential projection complexity on nested types.][48296]
216 This can provide up to a ~12% reduction in compile times for certain crates.
217 - [Added the `--remap-path-prefix` option to rustc.][48359] Allowing you
218 to remap path prefixes outputted by the compiler.
219 - [Added `powerpc-unknown-netbsd` target.][48281]
223 - [Implemented `From<u16> for usize` & `From<{u8, i16}> for isize`.][49305]
224 - [Added hexadecimal formatting for integers with fmt::Debug][48978]
225 e.g. `assert!(format!("{:02x?}", b"Foo\0") == "[46, 6f, 6f, 00]")`
226 - [Implemented `Default, Hash` for `cmp::Reverse`.][48628]
227 - [Optimized `str::repeat` being 8x faster in large cases.][48657]
228 - [`ascii::escape_default` is now available in libcore.][48735]
229 - [Trailing commas are now supported in std and core macros.][48056]
230 - [Implemented `Copy, Clone` for `cmp::Reverse`][47379]
231 - [Implemented `Clone` for `char::{ToLowercase, ToUppercase}`.][48629]
236 - [`*const T::copy_to_nonoverlapping`]
237 - [`*const T::copy_to`]
238 - [`*const T::read_unaligned`]
239 - [`*const T::read_volatile`]
242 - [`*const T::wrapping_add`]
243 - [`*const T::wrapping_sub`]
245 - [`*mut T::copy_to_nonoverlapping`]
246 - [`*mut T::copy_to`]
247 - [`*mut T::read_unaligned`]
248 - [`*mut T::read_volatile`]
250 - [`*mut T::replace`]
253 - [`*mut T::wrapping_add`]
254 - [`*mut T::wrapping_sub`]
255 - [`*mut T::write_bytes`]
256 - [`*mut T::write_unaligned`]
257 - [`*mut T::write_volatile`]
260 - [`FromUtf8Error::as_bytes`]
261 - [`LocalKey::try_with`]
263 - [`btree_map::Entry::and_modify`]
264 - [`fs::read_to_string`]
267 - [`hash_map::Entry::and_modify`]
268 - [`iter::FusedIterator`]
269 - [`ops::RangeInclusive`]
270 - [`ops::RangeToInclusive`]
272 - [`slice::rotate_left`]
273 - [`slice::rotate_right`]
279 - [Cargo will now output path to custom commands when `-v` is
280 passed with `--list`][cargo/5041]
281 - [The Cargo binary version is now the same as the Rust version][cargo/5083]
285 - [The second edition of "The Rust Programming Language" book is now recommended
286 over the first.][48404]
291 - [aliasing a `Fn` trait as `dyn` no longer works.][48481] E.g. the following
292 syntax is now invalid.
294 use std::ops::Fn as dyn;
295 fn g(_: Box<dyn(std::fmt::Debug)>) {}
297 - [The result of dereferences are no longer promoted to `'static`.][47408]
301 const PAIR: &(i32, i32) = &(0, 1);
302 let _reversed_pair: &'static _ = &(PAIR.1, PAIR.0); // Doesn't work
305 - [Deprecate `AsciiExt` trait in favor of inherent methods.][49109]
306 - [`".e0"` will now no longer parse as `0.0` and will instead cause
308 - [Removed hoedown from rustdoc.][48274]
309 - [Bounds on higher-kinded lifetimes a hard error.][48326]
311 [46882]: https://github.com/rust-lang/rust/pull/46882
312 [47379]: https://github.com/rust-lang/rust/pull/47379
313 [47408]: https://github.com/rust-lang/rust/pull/47408
314 [47813]: https://github.com/rust-lang/rust/pull/47813
315 [48056]: https://github.com/rust-lang/rust/pull/48056
316 [48125]: https://github.com/rust-lang/rust/pull/48125
317 [48166]: https://github.com/rust-lang/rust/pull/48166
318 [48235]: https://github.com/rust-lang/rust/pull/48235
319 [48274]: https://github.com/rust-lang/rust/pull/48274
320 [48281]: https://github.com/rust-lang/rust/pull/48281
321 [48296]: https://github.com/rust-lang/rust/pull/48296
322 [48326]: https://github.com/rust-lang/rust/pull/48326
323 [48359]: https://github.com/rust-lang/rust/pull/48359
324 [48404]: https://github.com/rust-lang/rust/pull/48404
325 [48481]: https://github.com/rust-lang/rust/pull/48481
326 [48516]: https://github.com/rust-lang/rust/pull/48516
327 [48628]: https://github.com/rust-lang/rust/pull/48628
328 [48629]: https://github.com/rust-lang/rust/pull/48629
329 [48657]: https://github.com/rust-lang/rust/pull/48657
330 [48735]: https://github.com/rust-lang/rust/pull/48735
331 [48978]: https://github.com/rust-lang/rust/pull/48978
332 [49101]: https://github.com/rust-lang/rust/pull/49101
333 [49109]: https://github.com/rust-lang/rust/pull/49109
334 [49121]: https://github.com/rust-lang/rust/pull/49121
335 [49162]: https://github.com/rust-lang/rust/pull/49162
336 [49184]: https://github.com/rust-lang/rust/pull/49184
337 [49234]: https://github.com/rust-lang/rust/pull/49234
338 [49255]: https://github.com/rust-lang/rust/pull/49255
339 [49299]: https://github.com/rust-lang/rust/pull/49299
340 [49305]: https://github.com/rust-lang/rust/pull/49305
341 [49394]: https://github.com/rust-lang/rust/pull/49394
342 [49458]: https://github.com/rust-lang/rust/pull/49458
343 [`*const T::add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.add
344 [`*const T::copy_to_nonoverlapping`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to_nonoverlapping
345 [`*const T::copy_to`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to
346 [`*const T::read_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_unaligned
347 [`*const T::read_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_volatile
348 [`*const T::read`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read
349 [`*const T::sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.sub
350 [`*const T::wrapping_add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_add
351 [`*const T::wrapping_sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_sub
352 [`*mut T::add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.add-1
353 [`*mut T::copy_to_nonoverlapping`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to_nonoverlapping-1
354 [`*mut T::copy_to`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to-1
355 [`*mut T::read_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_unaligned-1
356 [`*mut T::read_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_volatile-1
357 [`*mut T::read`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read-1
358 [`*mut T::replace`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.replace
359 [`*mut T::sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.sub-1
360 [`*mut T::swap`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.swap
361 [`*mut T::wrapping_add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_add-1
362 [`*mut T::wrapping_sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_sub-1
363 [`*mut T::write_bytes`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_bytes
364 [`*mut T::write_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_unaligned
365 [`*mut T::write_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_volatile
366 [`*mut T::write`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write
367 [`Box::leak`]: https://doc.rust-lang.org/std/boxed/struct.Box.html#method.leak
368 [`FromUtf8Error::as_bytes`]: https://doc.rust-lang.org/std/string/struct.FromUtf8Error.html#method.as_bytes
369 [`LocalKey::try_with`]: https://doc.rust-lang.org/std/thread/struct.LocalKey.html#method.try_with
370 [`Option::cloned`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.cloned
371 [`btree_map::Entry::and_modify`]: https://doc.rust-lang.org/std/collections/btree_map/enum.Entry.html#method.and_modify
372 [`fs::read_to_string`]: https://doc.rust-lang.org/std/fs/fn.read_to_string.html
373 [`fs::read`]: https://doc.rust-lang.org/std/fs/fn.read.html
374 [`fs::write`]: https://doc.rust-lang.org/std/fs/fn.write.html
375 [`hash_map::Entry::and_modify`]: https://doc.rust-lang.org/std/collections/hash_map/enum.Entry.html#method.and_modify
376 [`iter::FusedIterator`]: https://doc.rust-lang.org/std/iter/trait.FusedIterator.html
377 [`ops::RangeInclusive`]: https://doc.rust-lang.org/std/ops/struct.RangeInclusive.html
378 [`ops::RangeToInclusive`]: https://doc.rust-lang.org/std/ops/struct.RangeToInclusive.html
379 [`process::id`]: https://doc.rust-lang.org/std/process/fn.id.html
380 [`slice::rotate_left`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rotate_left
381 [`slice::rotate_right`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rotate_right
382 [`String::retain`]: https://doc.rust-lang.org/std/string/struct.String.html#method.retain
383 [cargo/5041]: https://github.com/rust-lang/cargo/pull/5041
384 [cargo/5083]: https://github.com/rust-lang/cargo/pull/5083
387 Version 1.25.0 (2018-03-29)
388 ==========================
392 - [Stabilised `#[repr(align(x))]`.][47006] [RFC 1358]
393 - [You can now use nested groups of imports.][47948]
394 e.g. `use std::{fs::File, io::Read, path::{Path, PathBuf}};`
395 - [You can now have `|` at the start of a match arm.][47947] e.g.
403 | Foo::B => println!("AB"),
404 | Foo::C => println!("C"),
411 - [Upgraded to LLVM 6.][47828]
412 - [Added `-C lto=val` option.][47521]
413 - [Added `i586-unknown-linux-musl` target][47282]
417 - [Impl Send for `process::Command` on Unix.][47760]
418 - [Impl PartialEq and Eq for `ParseCharError`.][47790]
419 - [`UnsafeCell::into_inner` is now safe.][47204]
420 - [Implement libstd for CloudABI.][47268]
421 - [`Float::{from_bits, to_bits}` is now available in libcore.][46931]
422 - [Implement `AsRef<Path>` for Component][46985]
423 - [Implemented `Write` for `Cursor<&mut Vec<u8>>`][46830]
424 - [Moved `Duration` to libcore.][46666]
428 - [`Location::column`]
431 The following functions can now be used in a constant expression.
432 eg. `static MINUTE: Duration = Duration::from_secs(60);`
433 - [`Duration::new`][47300]
434 - [`Duration::from_secs`][47300]
435 - [`Duration::from_millis`][47300]
439 - [`cargo new` no longer removes `rust` or `rs` prefixs/suffixs.][cargo/5013]
440 - [`cargo new` now defaults to creating a binary crate, instead of a
441 library crate.][cargo/5029]
445 - [Rust by example is now shipped with new releases][46196]
449 - [Deprecated `net::lookup_host`.][47510]
450 - [`rustdoc` has switched to pulldown as the default markdown renderer.][47398]
451 - The borrow checker was sometimes incorrectly permitting overlapping borrows
452 around indexing operations (see [#47349][47349]). This has been fixed (which also
453 enabled some correct code that used to cause errors (e.g. [#33903][33903] and [#46095][46095]).
454 - [Removed deprecated unstable attribute `#[simd]`.][47251]
456 [33903]: https://github.com/rust-lang/rust/pull/33903
457 [47947]: https://github.com/rust-lang/rust/pull/47947
458 [47948]: https://github.com/rust-lang/rust/pull/47948
459 [47760]: https://github.com/rust-lang/rust/pull/47760
460 [47790]: https://github.com/rust-lang/rust/pull/47790
461 [47828]: https://github.com/rust-lang/rust/pull/47828
462 [47398]: https://github.com/rust-lang/rust/pull/47398
463 [47510]: https://github.com/rust-lang/rust/pull/47510
464 [47521]: https://github.com/rust-lang/rust/pull/47521
465 [47204]: https://github.com/rust-lang/rust/pull/47204
466 [47251]: https://github.com/rust-lang/rust/pull/47251
467 [47268]: https://github.com/rust-lang/rust/pull/47268
468 [47282]: https://github.com/rust-lang/rust/pull/47282
469 [47300]: https://github.com/rust-lang/rust/pull/47300
470 [47349]: https://github.com/rust-lang/rust/pull/47349
471 [46931]: https://github.com/rust-lang/rust/pull/46931
472 [46985]: https://github.com/rust-lang/rust/pull/46985
473 [47006]: https://github.com/rust-lang/rust/pull/47006
474 [46830]: https://github.com/rust-lang/rust/pull/46830
475 [46095]: https://github.com/rust-lang/rust/pull/46095
476 [46666]: https://github.com/rust-lang/rust/pull/46666
477 [46196]: https://github.com/rust-lang/rust/pull/46196
478 [cargo/5013]: https://github.com/rust-lang/cargo/pull/5013
479 [cargo/5029]: https://github.com/rust-lang/cargo/pull/5029
480 [RFC 1358]: https://github.com/rust-lang/rfcs/pull/1358
481 [`Location::column`]: https://doc.rust-lang.org/std/panic/struct.Location.html#method.column
482 [`ptr::NonNull`]: https://doc.rust-lang.org/std/ptr/struct.NonNull.html
485 Version 1.24.1 (2018-03-01)
486 ==========================
488 - [Do not abort when unwinding through FFI][48251]
489 - [Emit UTF-16 files for linker arguments on Windows][48318]
490 - [Make the error index generator work again][48308]
491 - [Cargo will warn on Windows 7 if an update is needed][cargo/5069].
493 [48251]: https://github.com/rust-lang/rust/issues/48251
494 [48308]: https://github.com/rust-lang/rust/issues/48308
495 [48318]: https://github.com/rust-lang/rust/issues/48318
496 [cargo/5069]: https://github.com/rust-lang/cargo/pull/5069
499 Version 1.24.0 (2018-02-15)
500 ==========================
504 - [External `sysv64` ffi is now available.][46528]
505 eg. `extern "sysv64" fn foo () {}`
509 - [rustc now uses 16 codegen units by default for release builds.][46910]
510 For the fastest builds, utilize `codegen-units=1`.
511 - [Added `armv4t-unknown-linux-gnueabi` target.][47018]
512 - [Add `aarch64-unknown-openbsd` support][46760]
516 - [`str::find::<char>` now uses memchr.][46735] This should lead to a 10x
517 improvement in performance in the majority of cases.
518 - [`OsStr`'s `Debug` implementation is now lossless and consistent
519 with Windows.][46798]
520 - [`time::{SystemTime, Instant}` now implement `Hash`.][46828]
521 - [impl `From<bool>` for `AtomicBool`][46293]
522 - [impl `From<{CString, &CStr}>` for `{Arc<CStr>, Rc<CStr>}`][45990]
523 - [impl `From<{OsString, &OsStr}>` for `{Arc<OsStr>, Rc<OsStr>}`][45990]
524 - [impl `From<{PathBuf, &Path}>` for `{Arc<Path>, Rc<Path>}`][45990]
525 - [float::from_bits now just uses transmute.][46012] This provides
526 some optimisations from LLVM.
527 - [Copied `AsciiExt` methods onto `char`][46077]
528 - [Remove `T: Sized` requirement on `ptr::is_null()`][46094]
529 - [impl `From<RecvError>` for `{TryRecvError, RecvTimeoutError}`][45506]
530 - [Optimised `f32::{min, max}` to generate more efficient x86 assembly][47080]
531 - [`[u8]::contains` now uses memchr which provides a 3x speed improvement][46713]
535 - [`RefCell::replace`]
537 - [`atomic::spin_loop_hint`]
539 The following functions can now be used in a constant expression.
540 eg. `let buffer: [u8; size_of::<usize>()];`, `static COUNTER: AtomicUsize = AtomicUsize::new(1);`
542 - [`AtomicBool::new`][46287]
543 - [`AtomicUsize::new`][46287]
544 - [`AtomicIsize::new`][46287]
545 - [`AtomicPtr::new`][46287]
546 - [`Cell::new`][46287]
547 - [`{integer}::min_value`][46287]
548 - [`{integer}::max_value`][46287]
549 - [`mem::size_of`][46287]
550 - [`mem::align_of`][46287]
551 - [`ptr::null`][46287]
552 - [`ptr::null_mut`][46287]
553 - [`RefCell::new`][46287]
554 - [`UnsafeCell::new`][46287]
558 - [Added a `workspace.default-members` config that
559 overrides implied `--all` in virtual workspaces.][cargo/4743]
560 - [Enable incremental by default on development builds.][cargo/4817] Also added
561 configuration keys to `Cargo.toml` and `.cargo/config` to disable on a
562 per-project or global basis respectively.
569 - [Floating point types `Debug` impl now always prints a decimal point.][46831]
570 - [`Ipv6Addr` now rejects superfluous `::`'s in IPv6 addresses][46671] This is
571 in accordance with IETF RFC 4291 §2.2.
572 - [Unwinding will no longer go past FFI boundaries, and will instead abort.][46833]
573 - [`Formatter::flags` method is now deprecated.][46284] The `sign_plus`,
574 `sign_minus`, `alternate`, and `sign_aware_zero_pad` should be used instead.
575 - [Leading zeros in tuple struct members is now an error][47084]
576 - [`column!()` macro is one-based instead of zero-based][46977]
577 - [`fmt::Arguments` can no longer be shared across threads][45198]
578 - [Access to `#[repr(packed)]` struct fields is now unsafe][44884]
579 - [Cargo sets a different working directory for the compiler][cargo/4788]
581 [44884]: https://github.com/rust-lang/rust/pull/44884
582 [45198]: https://github.com/rust-lang/rust/pull/45198
583 [45506]: https://github.com/rust-lang/rust/pull/45506
584 [45904]: https://github.com/rust-lang/rust/pull/45904
585 [45990]: https://github.com/rust-lang/rust/pull/45990
586 [46012]: https://github.com/rust-lang/rust/pull/46012
587 [46077]: https://github.com/rust-lang/rust/pull/46077
588 [46094]: https://github.com/rust-lang/rust/pull/46094
589 [46284]: https://github.com/rust-lang/rust/pull/46284
590 [46287]: https://github.com/rust-lang/rust/pull/46287
591 [46293]: https://github.com/rust-lang/rust/pull/46293
592 [46528]: https://github.com/rust-lang/rust/pull/46528
593 [46671]: https://github.com/rust-lang/rust/pull/46671
594 [46713]: https://github.com/rust-lang/rust/pull/46713
595 [46735]: https://github.com/rust-lang/rust/pull/46735
596 [46749]: https://github.com/rust-lang/rust/pull/46749
597 [46760]: https://github.com/rust-lang/rust/pull/46760
598 [46798]: https://github.com/rust-lang/rust/pull/46798
599 [46828]: https://github.com/rust-lang/rust/pull/46828
600 [46831]: https://github.com/rust-lang/rust/pull/46831
601 [46833]: https://github.com/rust-lang/rust/pull/46833
602 [46910]: https://github.com/rust-lang/rust/pull/46910
603 [46977]: https://github.com/rust-lang/rust/pull/46977
604 [47018]: https://github.com/rust-lang/rust/pull/47018
605 [47080]: https://github.com/rust-lang/rust/pull/47080
606 [47084]: https://github.com/rust-lang/rust/pull/47084
607 [cargo/4743]: https://github.com/rust-lang/cargo/pull/4743
608 [cargo/4788]: https://github.com/rust-lang/cargo/pull/4788
609 [cargo/4817]: https://github.com/rust-lang/cargo/pull/4817
610 [`RefCell::replace`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.replace
611 [`RefCell::swap`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.swap
612 [`atomic::spin_loop_hint`]: https://doc.rust-lang.org/std/sync/atomic/fn.spin_loop_hint.html
615 Version 1.23.0 (2018-01-04)
616 ==========================
620 - [Arbitrary `auto` traits are now permitted in trait objects.][45772]
621 - [rustc now uses subtyping on the left hand side of binary operations.][45435]
622 Which should fix some confusing errors in some operations.
626 - [Enabled `TrapUnreachable` in LLVM which should mitigate the impact of
627 undefined behaviour.][45920]
628 - [rustc now suggests renaming import if names clash.][45660]
629 - [Display errors/warnings correctly when there are zero-width or
630 wide characters.][45711]
631 - [rustc now avoids unnecessary copies of arguments that are
632 simple bindings][45380] This should improve memory usage on average by 5-10%.
633 - [Updated musl used to build musl rustc to 1.1.17][45393]
637 - [Allow a trailing comma in `assert_eq/ne` macro][45887]
638 - [Implement Hash for raw pointers to unsized types][45483]
639 - [impl `From<*mut T>` for `AtomicPtr<T>`][45610]
640 - [impl `From<usize/isize>` for `AtomicUsize/AtomicIsize`.][45610]
641 - [Removed the `T: Sync` requirement for `RwLock<T>: Send`][45267]
642 - [Removed `T: Sized` requirement for `{<*const T>, <*mut T>}::as_ref`
643 and `<*mut T>::as_mut`][44932]
644 - [Optimized `Thread::{park, unpark}` implementation][45524]
645 - [Improved `SliceExt::binary_search` performance.][45333]
646 - [impl `FromIterator<()>` for `()`][45379]
647 - [Copied `AsciiExt` trait methods to primitive types.][44042] Use of `AsciiExt`
655 - [Cargo now supports uninstallation of multiple packages][cargo/4561]
656 eg. `cargo uninstall foo bar` uninstalls `foo` and `bar`.
657 - [Added unit test checking to `cargo check`][cargo/4592]
658 - [Cargo now lets you install a specific version
659 using `cargo install --version`][cargo/4637]
663 - [Releases now ship with the Cargo book documentation.][45692]
664 - [rustdoc now prints rendering warnings on every run.][45324]
668 - [Changes have been made to type equality to make it more correct,
669 in rare cases this could break some code.][45853] [Tracking issue for
670 further information][45852]
671 - [`char::escape_debug` now uses Unicode 10 over 9.][45571]
672 - [Upgraded Android SDK to 27, and NDK to r15c.][45580] This drops support for
673 Android 9, the minimum supported version is Android 14.
674 - [Bumped the minimum LLVM to 3.9][45326]
676 [44042]: https://github.com/rust-lang/rust/pull/44042
677 [44932]: https://github.com/rust-lang/rust/pull/44932
678 [45267]: https://github.com/rust-lang/rust/pull/45267
679 [45324]: https://github.com/rust-lang/rust/pull/45324
680 [45326]: https://github.com/rust-lang/rust/pull/45326
681 [45333]: https://github.com/rust-lang/rust/pull/45333
682 [45379]: https://github.com/rust-lang/rust/pull/45379
683 [45380]: https://github.com/rust-lang/rust/pull/45380
684 [45393]: https://github.com/rust-lang/rust/pull/45393
685 [45435]: https://github.com/rust-lang/rust/pull/45435
686 [45483]: https://github.com/rust-lang/rust/pull/45483
687 [45524]: https://github.com/rust-lang/rust/pull/45524
688 [45571]: https://github.com/rust-lang/rust/pull/45571
689 [45580]: https://github.com/rust-lang/rust/pull/45580
690 [45610]: https://github.com/rust-lang/rust/pull/45610
691 [45660]: https://github.com/rust-lang/rust/pull/45660
692 [45692]: https://github.com/rust-lang/rust/pull/45692
693 [45711]: https://github.com/rust-lang/rust/pull/45711
694 [45772]: https://github.com/rust-lang/rust/pull/45772
695 [45852]: https://github.com/rust-lang/rust/issues/45852
696 [45853]: https://github.com/rust-lang/rust/pull/45853
697 [45887]: https://github.com/rust-lang/rust/pull/45887
698 [45920]: https://github.com/rust-lang/rust/pull/45920
699 [cargo/4561]: https://github.com/rust-lang/cargo/pull/4561
700 [cargo/4592]: https://github.com/rust-lang/cargo/pull/4592
701 [cargo/4637]: https://github.com/rust-lang/cargo/pull/4637
704 Version 1.22.1 (2017-11-22)
705 ==========================
707 - [Update Cargo to fix an issue with macOS 10.13 "High Sierra"][46183]
709 [46183]: https://github.com/rust-lang/rust/pull/46183
711 Version 1.22.0 (2017-11-22)
712 ==========================
716 - [`non_snake_case` lint now allows extern no-mangle functions][44966]
717 - [Now accepts underscores in unicode escapes][43716]
718 - [`T op= &T` now works for numeric types.][44287] eg. `let mut x = 2; x += &8;`
719 - [types that impl `Drop` are now allowed in `const` and `static` types][44456]
723 - [rustc now defaults to having 16 codegen units at debug on supported platforms.][45064]
724 - [rustc will no longer inline in codegen units when compiling for debug][45075]
725 This should decrease compile times for debug builds.
726 - [strict memory alignment now enabled on ARMv6][45094]
727 - [Remove support for the PNaCl target `le32-unknown-nacl`][45041]
731 - [Allow atomic operations up to 32 bits
732 on `armv5te_unknown_linux_gnueabi`][44978]
733 - [`Box<Error>` now impls `From<Cow<str>>`][44466]
734 - [`std::mem::Discriminant` is now guaranteed to be `Send + Sync`][45095]
735 - [`fs::copy` now returns the length of the main stream on NTFS.][44895]
736 - [Properly detect overflow in `Instant += Duration`.][44220]
737 - [impl `Hasher` for `{&mut Hasher, Box<Hasher>}`][44015]
738 - [impl `fmt::Debug` for `SplitWhitespace`.][44303]
739 - [`Option<T>` now impls `Try`][42526] This allows for using `?` with `Option` types.
746 - [Cargo will now build multi file examples in subdirectories of the `examples`
747 folder that have a `main.rs` file.][cargo/4496]
748 - [Changed `[root]` to `[package]` in `Cargo.lock`][cargo/4571] Packages with
749 the old format will continue to work and can be updated with `cargo update`.
750 - [Now supports vendoring git repositories][cargo/3992]
754 - [`libbacktrace` is now available on Apple platforms.][44251]
755 - [Stabilised the `compile_fail` attribute for code fences in doc-comments.][43949]
756 This now lets you specify that a given code example will fail to compile.
760 - [The minimum Android version that rustc can build for has been bumped
761 to `4.0` from `2.3`][45656]
762 - [Allowing `T op= &T` for numeric types has broken some type
763 inference cases][45480]
766 [42526]: https://github.com/rust-lang/rust/pull/42526
767 [43017]: https://github.com/rust-lang/rust/pull/43017
768 [43716]: https://github.com/rust-lang/rust/pull/43716
769 [43949]: https://github.com/rust-lang/rust/pull/43949
770 [44015]: https://github.com/rust-lang/rust/pull/44015
771 [44220]: https://github.com/rust-lang/rust/pull/44220
772 [44251]: https://github.com/rust-lang/rust/pull/44251
773 [44287]: https://github.com/rust-lang/rust/pull/44287
774 [44303]: https://github.com/rust-lang/rust/pull/44303
775 [44456]: https://github.com/rust-lang/rust/pull/44456
776 [44466]: https://github.com/rust-lang/rust/pull/44466
777 [44895]: https://github.com/rust-lang/rust/pull/44895
778 [44966]: https://github.com/rust-lang/rust/pull/44966
779 [44978]: https://github.com/rust-lang/rust/pull/44978
780 [45041]: https://github.com/rust-lang/rust/pull/45041
781 [45064]: https://github.com/rust-lang/rust/pull/45064
782 [45075]: https://github.com/rust-lang/rust/pull/45075
783 [45094]: https://github.com/rust-lang/rust/pull/45094
784 [45095]: https://github.com/rust-lang/rust/pull/45095
785 [45480]: https://github.com/rust-lang/rust/issues/45480
786 [45656]: https://github.com/rust-lang/rust/pull/45656
787 [cargo/3992]: https://github.com/rust-lang/cargo/pull/3992
788 [cargo/4496]: https://github.com/rust-lang/cargo/pull/4496
789 [cargo/4571]: https://github.com/rust-lang/cargo/pull/4571
796 Version 1.21.0 (2017-10-12)
797 ==========================
801 - [You can now use static references for literals.][43838]
805 let x: &'static u32 = &0;
808 - [Relaxed path syntax. Optional `::` before `<` is now allowed in all contexts.][43540]
811 my_macro!(Vec<i32>::new); // Always worked
812 my_macro!(Vec::<i32>::new); // Now works
817 - [Upgraded jemalloc to 4.5.0][43911]
818 - [Enabled unwinding panics on Redox][43917]
819 - [Now runs LLVM in parallel during translation phase.][43506]
820 This should reduce peak memory usage.
824 - [Generate builtin impls for `Clone` for all arrays and tuples that
825 are `T: Clone`][43690]
826 - [`Stdin`, `Stdout`, and `Stderr` now implement `AsRawFd`.][43459]
827 - [`Rc` and `Arc` now implement `From<&[T]> where T: Clone`, `From<str>`,
828 `From<String>`, `From<Box<T>> where T: ?Sized`, and `From<Vec<T>>`.][42565]
833 [`std::mem::discriminant`]
837 - [You can now call `cargo install` with multiple package names][cargo/4216]
838 - [Cargo commands inside a virtual workspace will now implicitly
839 pass `--all`][cargo/4335]
840 - [Added a `[patch]` section to `Cargo.toml` to handle
841 prepublication dependencies][cargo/4123] [RFC 1969]
842 - [`include` & `exclude` fields in `Cargo.toml` now accept gitignore
843 like patterns][cargo/4270]
844 - [Added the `--all-targets` option][cargo/4400]
845 - [Using required dependencies as a feature is now deprecated and emits
846 a warning][cargo/4364]
851 - [Cargo docs are moving][43916]
852 to [doc.rust-lang.org/cargo](https://doc.rust-lang.org/cargo)
853 - [The rustdoc book is now available][43863]
854 at [doc.rust-lang.org/rustdoc](https://doc.rust-lang.org/rustdoc)
855 - [Added a preview of RLS has been made available through rustup][44204]
856 Install with `rustup component add rls-preview`
857 - [`std::os` documentation for Unix, Linux, and Windows now appears on doc.rust-lang.org][43348]
858 Previously only showed `std::os::unix`.
862 - [Changes in method matching against higher-ranked types][43880] This may cause
863 breakage in subtyping corner cases. [A more in-depth explanation is available.][info/43880]
864 - [rustc's JSON error output's byte position start at top of file.][42973]
865 Was previously relative to the rustc's internal `CodeMap` struct which
866 required the unstable library `libsyntax` to correctly use.
867 - [`unused_results` lint no longer ignores booleans][43728]
869 [42565]: https://github.com/rust-lang/rust/pull/42565
870 [42973]: https://github.com/rust-lang/rust/pull/42973
871 [43348]: https://github.com/rust-lang/rust/pull/43348
872 [43459]: https://github.com/rust-lang/rust/pull/43459
873 [43506]: https://github.com/rust-lang/rust/pull/43506
874 [43540]: https://github.com/rust-lang/rust/pull/43540
875 [43690]: https://github.com/rust-lang/rust/pull/43690
876 [43728]: https://github.com/rust-lang/rust/pull/43728
877 [43838]: https://github.com/rust-lang/rust/pull/43838
878 [43863]: https://github.com/rust-lang/rust/pull/43863
879 [43880]: https://github.com/rust-lang/rust/pull/43880
880 [43911]: https://github.com/rust-lang/rust/pull/43911
881 [43916]: https://github.com/rust-lang/rust/pull/43916
882 [43917]: https://github.com/rust-lang/rust/pull/43917
883 [44204]: https://github.com/rust-lang/rust/pull/44204
884 [cargo/4123]: https://github.com/rust-lang/cargo/pull/4123
885 [cargo/4216]: https://github.com/rust-lang/cargo/pull/4216
886 [cargo/4270]: https://github.com/rust-lang/cargo/pull/4270
887 [cargo/4335]: https://github.com/rust-lang/cargo/pull/4335
888 [cargo/4364]: https://github.com/rust-lang/cargo/pull/4364
889 [cargo/4400]: https://github.com/rust-lang/cargo/pull/4400
890 [RFC 1969]: https://github.com/rust-lang/rfcs/pull/1969
891 [info/43880]: https://github.com/rust-lang/rust/issues/44224#issuecomment-330058902
892 [`std::mem::discriminant`]: https://doc.rust-lang.org/std/mem/fn.discriminant.html
894 Version 1.20.0 (2017-08-31)
895 ===========================
899 - [Associated constants are now stabilised.][42809]
900 - [A lot of macro bugs are now fixed.][42913]
905 - [Struct fields are now properly coerced to the expected field type.][42807]
906 - [Enabled wasm LLVM backend][42571] WASM can now be built with the
907 `wasm32-experimental-emscripten` target.
908 - [Changed some of the error messages to be more helpful.][42033]
909 - [Add support for RELRO(RELocation Read-Only) for platforms that support
911 - [rustc now reports the total number of errors on compilation failure][43015]
912 previously this was only the number of errors in the pass that failed.
913 - [Expansion in rustc has been sped up 29x.][42533]
914 - [added `msp430-none-elf` target.][43099]
915 - [rustc will now suggest one-argument enum variant to fix type mismatch when
917 - [Fixes backtraces on Redox][43228]
918 - [rustc now identifies different versions of same crate when absolute paths of
919 different types match in an error message.][42826]
925 - [Relaxed Debug constraints on `{HashMap,BTreeMap}::{Keys,Values}`.][42854]
926 - [Impl `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Debug`, `Hash` for unsized
928 - [Impl `fmt::{Display, Debug}` for `Ref`, `RefMut`, `MutexGuard`,
929 `RwLockReadGuard`, `RwLockWriteGuard`][42822]
930 - [Impl `Clone` for `DefaultHasher`.][42799]
931 - [Impl `Sync` for `SyncSender`.][42397]
932 - [Impl `FromStr` for `char`][42271]
933 - [Fixed how `{f32, f64}::{is_sign_negative, is_sign_positive}` handles
935 - [allow messages in the `unimplemented!()` macro.][42155]
936 ie. `unimplemented!("Waiting for 1.21 to be stable")`
937 - [`pub(restricted)` is now supported in the `thread_local!` macro.][43185]
938 - [Upgrade to Unicode 10.0.0][42999]
939 - [Reimplemented `{f32, f64}::{min, max}` in Rust instead of using CMath.][42430]
940 - [Skip the main thread's manual stack guard on Linux][43072]
941 - [Iterator::nth for `ops::{Range, RangeFrom}` is now done in O(1) time][43077]
942 - [`#[repr(align(N))]` attribute max number is now 2^31 - 1.][43097] This was
944 - [`{OsStr, Path}::Display` now avoids allocations where possible][42613]
949 - [`CStr::into_c_string`]
950 - [`CString::as_c_str`]
951 - [`CString::into_boxed_c_str`]
954 - [`Chain::into_inner`]
955 - [`Option::get_or_insert_with`]
956 - [`Option::get_or_insert`]
957 - [`OsStr::into_os_string`]
958 - [`OsString::into_boxed_os_str`]
961 - [`Utf8Error::error_len`]
962 - [`char::EscapeDebug`]
963 - [`char::escape_debug`]
969 - [`mem::ManuallyDrop`]
970 - [`slice::sort_unstable_by_key`]
971 - [`slice::sort_unstable_by`]
972 - [`slice::sort_unstable`]
973 - [`str::from_boxed_utf8_unchecked`]
974 - [`str::as_bytes_mut`]
975 - [`str::as_bytes_mut`]
976 - [`str::from_utf8_mut`]
977 - [`str::from_utf8_unchecked_mut`]
979 - [`str::get_unchecked_mut`]
980 - [`str::get_unchecked`]
982 - [`str::into_boxed_bytes`]
987 - [Cargo API token location moved from `~/.cargo/config` to
988 `~/.cargo/credentials`.][cargo/3978]
989 - [Cargo will now build `main.rs` binaries that are in sub-directories of
990 `src/bin`.][cargo/4214] ie. Having `src/bin/server/main.rs` and
991 `src/bin/client/main.rs` generates `target/debug/server` and `target/debug/client`
992 - [You can now specify version of a binary when installed through
993 `cargo install` using `--vers`.][cargo/4229]
994 - [Added `--no-fail-fast` flag to cargo to run all benchmarks regardless of
995 failure.][cargo/4248]
996 - [Changed the convention around which file is the crate root.][cargo/4259]
997 - [The `include`/`exclude` property in `Cargo.toml` now accepts gitignore paths
998 instead of glob patterns][cargo/4270]. Glob patterns are now deprecated.
1003 - [Functions with `'static` in their return types will now not be as usable as
1004 if they were using lifetime parameters instead.][42417]
1005 - [The reimplementation of `{f32, f64}::is_sign_{negative, positive}` now
1006 takes the sign of NaN into account where previously didn't.][42430]
1008 [42033]: https://github.com/rust-lang/rust/pull/42033
1009 [42155]: https://github.com/rust-lang/rust/pull/42155
1010 [42271]: https://github.com/rust-lang/rust/pull/42271
1011 [42397]: https://github.com/rust-lang/rust/pull/42397
1012 [42417]: https://github.com/rust-lang/rust/pull/42417
1013 [42430]: https://github.com/rust-lang/rust/pull/42430
1014 [42431]: https://github.com/rust-lang/rust/pull/42431
1015 [42533]: https://github.com/rust-lang/rust/pull/42533
1016 [42571]: https://github.com/rust-lang/rust/pull/42571
1017 [42613]: https://github.com/rust-lang/rust/pull/42613
1018 [42799]: https://github.com/rust-lang/rust/pull/42799
1019 [42807]: https://github.com/rust-lang/rust/pull/42807
1020 [42809]: https://github.com/rust-lang/rust/pull/42809
1021 [42822]: https://github.com/rust-lang/rust/pull/42822
1022 [42826]: https://github.com/rust-lang/rust/pull/42826
1023 [42854]: https://github.com/rust-lang/rust/pull/42854
1024 [42913]: https://github.com/rust-lang/rust/pull/42913
1025 [42999]: https://github.com/rust-lang/rust/pull/42999
1026 [43011]: https://github.com/rust-lang/rust/pull/43011
1027 [43015]: https://github.com/rust-lang/rust/pull/43015
1028 [43072]: https://github.com/rust-lang/rust/pull/43072
1029 [43077]: https://github.com/rust-lang/rust/pull/43077
1030 [43097]: https://github.com/rust-lang/rust/pull/43097
1031 [43099]: https://github.com/rust-lang/rust/pull/43099
1032 [43170]: https://github.com/rust-lang/rust/pull/43170
1033 [43178]: https://github.com/rust-lang/rust/pull/43178
1034 [43185]: https://github.com/rust-lang/rust/pull/43185
1035 [43228]: https://github.com/rust-lang/rust/pull/43228
1036 [cargo/3978]: https://github.com/rust-lang/cargo/pull/3978
1037 [cargo/4214]: https://github.com/rust-lang/cargo/pull/4214
1038 [cargo/4229]: https://github.com/rust-lang/cargo/pull/4229
1039 [cargo/4248]: https://github.com/rust-lang/cargo/pull/4248
1040 [cargo/4259]: https://github.com/rust-lang/cargo/pull/4259
1041 [cargo/4270]: https://github.com/rust-lang/cargo/pull/4270
1042 [`CStr::into_c_string`]: https://doc.rust-lang.org/std/ffi/struct.CStr.html#method.into_c_string
1043 [`CString::as_c_str`]: https://doc.rust-lang.org/std/ffi/struct.CString.html#method.as_c_str
1044 [`CString::into_boxed_c_str`]: https://doc.rust-lang.org/std/ffi/struct.CString.html#method.into_boxed_c_str
1045 [`Chain::get_mut`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.get_mut
1046 [`Chain::get_ref`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.get_ref
1047 [`Chain::into_inner`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.into_inner
1048 [`Option::get_or_insert_with`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.get_or_insert_with
1049 [`Option::get_or_insert`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.get_or_insert
1050 [`OsStr::into_os_string`]: https://doc.rust-lang.org/std/ffi/struct.OsStr.html#method.into_os_string
1051 [`OsString::into_boxed_os_str`]: https://doc.rust-lang.org/std/ffi/struct.OsString.html#method.into_boxed_os_str
1052 [`Take::get_mut`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.get_mut
1053 [`Take::get_ref`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.get_ref
1054 [`Utf8Error::error_len`]: https://doc.rust-lang.org/std/str/struct.Utf8Error.html#method.error_len
1055 [`char::EscapeDebug`]: https://doc.rust-lang.org/std/char/struct.EscapeDebug.html
1056 [`char::escape_debug`]: https://doc.rust-lang.org/std/primitive.char.html#method.escape_debug
1057 [`compile_error!`]: https://doc.rust-lang.org/std/macro.compile_error.html
1058 [`f32::from_bits`]: https://doc.rust-lang.org/std/primitive.f32.html#method.from_bits
1059 [`f32::to_bits`]: https://doc.rust-lang.org/std/primitive.f32.html#method.to_bits
1060 [`f64::from_bits`]: https://doc.rust-lang.org/std/primitive.f64.html#method.from_bits
1061 [`f64::to_bits`]: https://doc.rust-lang.org/std/primitive.f64.html#method.to_bits
1062 [`mem::ManuallyDrop`]: https://doc.rust-lang.org/std/mem/union.ManuallyDrop.html
1063 [`slice::sort_unstable_by_key`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable_by_key
1064 [`slice::sort_unstable_by`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable_by
1065 [`slice::sort_unstable`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable
1066 [`str::from_boxed_utf8_unchecked`]: https://doc.rust-lang.org/std/str/fn.from_boxed_utf8_unchecked.html
1067 [`str::as_bytes_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.as_bytes_mut
1068 [`str::from_utf8_mut`]: https://doc.rust-lang.org/std/str/fn.from_utf8_mut.html
1069 [`str::from_utf8_unchecked_mut`]: https://doc.rust-lang.org/std/str/fn.from_utf8_unchecked_mut.html
1070 [`str::get_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_mut
1071 [`str::get_unchecked_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_unchecked_mut
1072 [`str::get_unchecked`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_unchecked
1073 [`str::get`]: https://doc.rust-lang.org/std/primitive.str.html#method.get
1074 [`str::into_boxed_bytes`]: https://doc.rust-lang.org/std/primitive.str.html#method.into_boxed_bytes
1077 Version 1.19.0 (2017-07-20)
1078 ===========================
1083 - [Numeric fields can now be used for creating tuple structs.][41145] [RFC 1506]
1084 For example `struct Point(u32, u32); let x = Point { 0: 7, 1: 0 };`.
1085 - [Macro recursion limit increased to 1024 from 64.][41676]
1086 - [Added lint for detecting unused macros.][41907]
1087 - [`loop` can now return a value with `break`.][42016] [RFC 1624]
1088 For example: `let x = loop { break 7; };`
1089 - [C compatible `union`s are now available.][42068] [RFC 1444] They can only
1090 contain `Copy` types and cannot have a `Drop` implementation.
1091 Example: `union Foo { bar: u8, baz: usize }`
1092 - [Non capturing closures can now be coerced into `fn`s,][42162] [RFC 1558]
1093 Example: `let foo: fn(u8) -> u8 = |v: u8| { v };`
1098 - [Add support for bootstrapping the Rust compiler toolchain on Android.][41370]
1099 - [Change `arm-linux-androideabi` to correspond to the `armeabi`
1100 official ABI.][41656] If you wish to continue targeting the `armeabi-v7a` ABI
1101 you should use `--target armv7-linux-androideabi`.
1102 - [Fixed ICE when removing a source file between compilation sessions.][41873]
1103 - [Minor optimisation of string operations.][42037]
1104 - [Compiler error message is now `aborting due to previous error(s)` instead of
1105 `aborting due to N previous errors`][42150] This was previously inaccurate and
1106 would only count certain kinds of errors.
1107 - [The compiler now supports Visual Studio 2017][42225]
1108 - [The compiler is now built against LLVM 4.0.1 by default][42948]
1109 - [Added a lot][42264] of [new error codes][42302]
1110 - [Added `target-feature=+crt-static` option][37406] [RFC 1721] Which allows
1111 libraries with C Run-time Libraries(CRT) to be statically linked.
1112 - [Fixed various ARM codegen bugs][42740]
1117 - [`String` now implements `FromIterator<Cow<'a, str>>` and
1118 `Extend<Cow<'a, str>>`][41449]
1119 - [`Vec` now implements `From<&mut [T]>`][41530]
1120 - [`Box<[u8]>` now implements `From<Box<str>>`][41258]
1121 - [`SplitWhitespace` now implements `Clone`][41659]
1122 - [`[u8]::reverse` is now 5x faster and `[u16]::reverse` is now
1124 - [`eprint!` and `eprintln!` macros added to prelude.][41192] Same as the `print!`
1125 macros, but for printing to stderr.
1130 - [`OsString::shrink_to_fit`]
1133 - [`thread::ThreadId`]
1138 - [Build scripts can now add environment variables to the environment
1139 the crate is being compiled in.
1140 Example: `println!("cargo:rustc-env=FOO=bar");`][cargo/3929]
1141 - [Subcommands now replace the current process rather than spawning a new
1142 child process][cargo/3970]
1143 - [Workspace members can now accept glob file patterns][cargo/3979]
1144 - [Added `--all` flag to the `cargo bench` subcommand to run benchmarks of all
1145 the members in a given workspace.][cargo/3988]
1146 - [Updated `libssh2-sys` to 0.2.6][cargo/4008]
1147 - [Target directory path is now in the cargo metadata][cargo/4022]
1148 - [Cargo no longer checks out a local working directory for the
1149 crates.io index][cargo/4026] This should provide smaller file size for the
1150 registry, and improve cloning times, especially on Windows machines.
1151 - [Added an `--exclude` option for excluding certain packages when using the
1152 `--all` option][cargo/4031]
1153 - [Cargo will now automatically retry when receiving a 5xx error
1154 from crates.io][cargo/4032]
1155 - [The `--features` option now accepts multiple comma or space
1156 delimited values.][cargo/4084]
1157 - [Added support for custom target specific runners][cargo/3954]
1162 - [Added `rust-windbg.cmd`][39983] for loading rust `.natvis` files in the
1164 - [Rust will now release XZ compressed packages][rust-installer/57]
1165 - [rustup will now prefer to download rust packages with
1166 XZ compression][rustup/1100] over GZip packages.
1167 - [Added the ability to escape `#` in rust documentation][41785] By adding
1168 additional `#`'s ie. `##` is now `#`
1173 - [`MutexGuard<T>` may only be `Sync` if `T` is `Sync`.][41624]
1174 - [`-Z` flags are now no longer allowed to be used on the stable
1175 compiler.][41751] This has been a warning for a year previous to this.
1176 - [As a result of the `-Z` flag change, the `cargo-check` plugin no
1177 longer works][42844]. Users should migrate to the built-in `check`
1178 command, which has been available since 1.16.
1179 - [Ending a float literal with `._` is now a hard error.
1180 Example: `42._` .][41946]
1181 - [Any use of a private `extern crate` outside of its module is now a
1182 hard error.][36886] This was previously a warning.
1183 - [`use ::self::foo;` is now a hard error.][36888] `self` paths are always
1184 relative while the `::` prefix makes a path absolute, but was ignored and the
1185 path was relative regardless.
1186 - [Floating point constants in match patterns is now a hard error][36890]
1187 This was previously a warning.
1188 - [Struct or enum constants that don't derive `PartialEq` & `Eq` used
1189 match patterns is now a hard error][36891] This was previously a warning.
1190 - [Lifetimes named `'_` are no longer allowed.][36892] This was previously
1192 - [From the pound escape, lines consisting of multiple `#`s are
1194 - [It is an error to re-export private enum variants][42460]. This is
1195 known to break a number of crates that depend on an older version of
1197 - [On Windows, if `VCINSTALLDIR` is set incorrectly, `rustc` will try
1198 to use it to find the linker, and the build will fail where it did
1199 not previously][42607]
1201 [36886]: https://github.com/rust-lang/rust/issues/36886
1202 [36888]: https://github.com/rust-lang/rust/issues/36888
1203 [36890]: https://github.com/rust-lang/rust/issues/36890
1204 [36891]: https://github.com/rust-lang/rust/issues/36891
1205 [36892]: https://github.com/rust-lang/rust/issues/36892
1206 [37406]: https://github.com/rust-lang/rust/issues/37406
1207 [39983]: https://github.com/rust-lang/rust/pull/39983
1208 [41145]: https://github.com/rust-lang/rust/pull/41145
1209 [41192]: https://github.com/rust-lang/rust/pull/41192
1210 [41258]: https://github.com/rust-lang/rust/pull/41258
1211 [41370]: https://github.com/rust-lang/rust/pull/41370
1212 [41449]: https://github.com/rust-lang/rust/pull/41449
1213 [41530]: https://github.com/rust-lang/rust/pull/41530
1214 [41624]: https://github.com/rust-lang/rust/pull/41624
1215 [41656]: https://github.com/rust-lang/rust/pull/41656
1216 [41659]: https://github.com/rust-lang/rust/pull/41659
1217 [41676]: https://github.com/rust-lang/rust/pull/41676
1218 [41751]: https://github.com/rust-lang/rust/pull/41751
1219 [41764]: https://github.com/rust-lang/rust/pull/41764
1220 [41785]: https://github.com/rust-lang/rust/pull/41785
1221 [41873]: https://github.com/rust-lang/rust/pull/41873
1222 [41907]: https://github.com/rust-lang/rust/pull/41907
1223 [41946]: https://github.com/rust-lang/rust/pull/41946
1224 [42016]: https://github.com/rust-lang/rust/pull/42016
1225 [42037]: https://github.com/rust-lang/rust/pull/42037
1226 [42068]: https://github.com/rust-lang/rust/pull/42068
1227 [42150]: https://github.com/rust-lang/rust/pull/42150
1228 [42162]: https://github.com/rust-lang/rust/pull/42162
1229 [42225]: https://github.com/rust-lang/rust/pull/42225
1230 [42264]: https://github.com/rust-lang/rust/pull/42264
1231 [42302]: https://github.com/rust-lang/rust/pull/42302
1232 [42460]: https://github.com/rust-lang/rust/issues/42460
1233 [42607]: https://github.com/rust-lang/rust/issues/42607
1234 [42740]: https://github.com/rust-lang/rust/pull/42740
1235 [42844]: https://github.com/rust-lang/rust/issues/42844
1236 [42948]: https://github.com/rust-lang/rust/pull/42948
1237 [RFC 1444]: https://github.com/rust-lang/rfcs/pull/1444
1238 [RFC 1506]: https://github.com/rust-lang/rfcs/pull/1506
1239 [RFC 1558]: https://github.com/rust-lang/rfcs/pull/1558
1240 [RFC 1624]: https://github.com/rust-lang/rfcs/pull/1624
1241 [RFC 1721]: https://github.com/rust-lang/rfcs/pull/1721
1242 [`Command::envs`]: https://doc.rust-lang.org/std/process/struct.Command.html#method.envs
1243 [`OsString::shrink_to_fit`]: https://doc.rust-lang.org/std/ffi/struct.OsString.html#method.shrink_to_fit
1244 [`cmp::Reverse`]: https://doc.rust-lang.org/std/cmp/struct.Reverse.html
1245 [`thread::ThreadId`]: https://doc.rust-lang.org/std/thread/struct.ThreadId.html
1246 [cargo/3929]: https://github.com/rust-lang/cargo/pull/3929
1247 [cargo/3954]: https://github.com/rust-lang/cargo/pull/3954
1248 [cargo/3970]: https://github.com/rust-lang/cargo/pull/3970
1249 [cargo/3979]: https://github.com/rust-lang/cargo/pull/3979
1250 [cargo/3988]: https://github.com/rust-lang/cargo/pull/3988
1251 [cargo/4008]: https://github.com/rust-lang/cargo/pull/4008
1252 [cargo/4022]: https://github.com/rust-lang/cargo/pull/4022
1253 [cargo/4026]: https://github.com/rust-lang/cargo/pull/4026
1254 [cargo/4031]: https://github.com/rust-lang/cargo/pull/4031
1255 [cargo/4032]: https://github.com/rust-lang/cargo/pull/4032
1256 [cargo/4084]: https://github.com/rust-lang/cargo/pull/4084
1257 [rust-installer/57]: https://github.com/rust-lang/rust-installer/pull/57
1258 [rustup/1100]: https://github.com/rust-lang-nursery/rustup.rs/pull/1100
1261 Version 1.18.0 (2017-06-08)
1262 ===========================
1267 - [Stabilize pub(restricted)][40556] `pub` can now accept a module path to
1268 make the item visible to just that module tree. Also accepts the keyword
1269 `crate` to make something public to the whole crate but not users of the
1270 library. Example: `pub(crate) mod utils;`. [RFC 1422].
1271 - [Stabilize `#![windows_subsystem]` attribute][40870] conservative exposure of the
1272 `/SUBSYSTEM` linker flag on Windows platforms. [RFC 1665].
1273 - [Refactor of trait object type parsing][40043] Now `ty` in macros can accept
1274 types like `Write + Send`, trailing `+` are now supported in trait objects,
1275 and better error reporting for trait objects starting with `?Sized`.
1276 - [0e+10 is now a valid floating point literal][40589]
1277 - [Now warns if you bind a lifetime parameter to 'static][40734]
1278 - [Tuples, Enum variant fields, and structs with no `repr` attribute or with
1279 `#[repr(Rust)]` are reordered to minimize padding and produce a smaller
1280 representation in some cases.][40377]
1285 - [rustc can now emit mir with `--emit mir`][39891]
1286 - [Improved LLVM IR for trivial functions][40367]
1287 - [Added explanation for E0090(Wrong number of lifetimes are supplied)][40723]
1288 - [rustc compilation is now 15%-20% faster][41469] Thanks to optimisation
1289 opportunities found through profiling
1290 - [Improved backtrace formatting when panicking][38165]
1295 - [Specialized `Vec::from_iter` being passed `vec::IntoIter`][40731] if the
1296 iterator hasn't been advanced the original `Vec` is reassembled with no actual
1297 iteration or reallocation.
1298 - [Simplified HashMap Bucket interface][40561] provides performance
1299 improvements for iterating and cloning.
1300 - [Specialize Vec::from_elem to use calloc][40409]
1301 - [Fixed Race condition in fs::create_dir_all][39799]
1302 - [No longer caching stdio on Windows][40516]
1303 - [Optimized insertion sort in slice][40807] insertion sort in some cases
1304 2.50%~ faster and in one case now 12.50% faster.
1305 - [Optimized `AtomicBool::fetch_nand`][41143]
1310 - [`Child::try_wait`]
1311 - [`HashMap::retain`]
1312 - [`HashSet::retain`]
1314 - [`TcpStream::peek`]
1315 - [`UdpSocket::peek`]
1316 - [`UdpSocket::peek_from`]
1321 - [Added partial Pijul support][cargo/3842] Pijul is a version control system in Rust.
1322 You can now create new cargo projects with Pijul using `cargo new --vcs pijul`
1323 - [Now always emits build script warnings for crates that fail to build][cargo/3847]
1324 - [Added Android build support][cargo/3885]
1325 - [Added `--bins` and `--tests` flags][cargo/3901] now you can build all programs
1326 of a certain type, for example `cargo build --bins` will build all
1328 - [Added support for haiku][cargo/3952]
1333 - [rustdoc can now use pulldown-cmark with the `--enable-commonmark` flag][40338]
1334 - [Added rust-windbg script for better debugging on Windows][39983]
1335 - [Rust now uses the official cross compiler for NetBSD][40612]
1336 - [rustdoc now accepts `#` at the start of files][40828]
1337 - [Fixed jemalloc support for musl][41168]
1342 - [Changes to how the `0` flag works in format!][40241] Padding zeroes are now
1343 always placed after the sign if it exists and before the digits. With the `#`
1344 flag the zeroes are placed after the prefix and before the digits.
1345 - [Due to the struct field optimisation][40377], using `transmute` on structs
1346 that have no `repr` attribute or `#[repr(Rust)]` will no longer work. This has
1347 always been undefined behavior, but is now more likely to break in practice.
1348 - [The refactor of trait object type parsing][40043] fixed a bug where `+` was
1349 receiving the wrong priority parsing things like `&for<'a> Tr<'a> + Send` as
1350 `&(for<'a> Tr<'a> + Send)` instead of `(&for<'a> Tr<'a>) + Send`
1351 - [Overlapping inherent `impl`s are now a hard error][40728]
1352 - [`PartialOrd` and `Ord` must agree on the ordering.][41270]
1353 - [`rustc main.rs -o out --emit=asm,llvm-ir`][41085] Now will output
1354 `out.asm` and `out.ll` instead of only one of the filetypes.
1355 - [ calling a function that returns `Self` will no longer work][41805] when
1356 the size of `Self` cannot be statically determined.
1357 - [rustc now builds with a "pthreads" flavour of MinGW for Windows GNU][40805]
1358 this has caused a few regressions namely:
1360 - Changed the link order of local static/dynamic libraries (respecting the
1361 order on given rather than having the compiler reorder).
1362 - Changed how MinGW is linked, native code linked to dynamic libraries
1363 may require manually linking to the gcc support library (for the native
1366 [38165]: https://github.com/rust-lang/rust/pull/38165
1367 [39799]: https://github.com/rust-lang/rust/pull/39799
1368 [39891]: https://github.com/rust-lang/rust/pull/39891
1369 [39983]: https://github.com/rust-lang/rust/pull/39983
1370 [40043]: https://github.com/rust-lang/rust/pull/40043
1371 [40241]: https://github.com/rust-lang/rust/pull/40241
1372 [40338]: https://github.com/rust-lang/rust/pull/40338
1373 [40367]: https://github.com/rust-lang/rust/pull/40367
1374 [40377]: https://github.com/rust-lang/rust/pull/40377
1375 [40409]: https://github.com/rust-lang/rust/pull/40409
1376 [40516]: https://github.com/rust-lang/rust/pull/40516
1377 [40556]: https://github.com/rust-lang/rust/pull/40556
1378 [40561]: https://github.com/rust-lang/rust/pull/40561
1379 [40589]: https://github.com/rust-lang/rust/pull/40589
1380 [40612]: https://github.com/rust-lang/rust/pull/40612
1381 [40723]: https://github.com/rust-lang/rust/pull/40723
1382 [40728]: https://github.com/rust-lang/rust/pull/40728
1383 [40731]: https://github.com/rust-lang/rust/pull/40731
1384 [40734]: https://github.com/rust-lang/rust/pull/40734
1385 [40805]: https://github.com/rust-lang/rust/pull/40805
1386 [40807]: https://github.com/rust-lang/rust/pull/40807
1387 [40828]: https://github.com/rust-lang/rust/pull/40828
1388 [40870]: https://github.com/rust-lang/rust/pull/40870
1389 [41085]: https://github.com/rust-lang/rust/pull/41085
1390 [41143]: https://github.com/rust-lang/rust/pull/41143
1391 [41168]: https://github.com/rust-lang/rust/pull/41168
1392 [41270]: https://github.com/rust-lang/rust/issues/41270
1393 [41469]: https://github.com/rust-lang/rust/pull/41469
1394 [41805]: https://github.com/rust-lang/rust/issues/41805
1395 [RFC 1422]: https://github.com/rust-lang/rfcs/blob/master/text/1422-pub-restricted.md
1396 [RFC 1665]: https://github.com/rust-lang/rfcs/blob/master/text/1665-windows-subsystem.md
1397 [`Child::try_wait`]: https://doc.rust-lang.org/std/process/struct.Child.html#method.try_wait
1398 [`HashMap::retain`]: https://doc.rust-lang.org/std/collections/struct.HashMap.html#method.retain
1399 [`HashSet::retain`]: https://doc.rust-lang.org/std/collections/struct.HashSet.html#method.retain
1400 [`PeekMut::pop`]: https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html#method.pop
1401 [`TcpStream::peek`]: https://doc.rust-lang.org/std/net/struct.TcpStream.html#method.peek
1402 [`UdpSocket::peek_from`]: https://doc.rust-lang.org/std/net/struct.UdpSocket.html#method.peek_from
1403 [`UdpSocket::peek`]: https://doc.rust-lang.org/std/net/struct.UdpSocket.html#method.peek
1404 [cargo/3842]: https://github.com/rust-lang/cargo/pull/3842
1405 [cargo/3847]: https://github.com/rust-lang/cargo/pull/3847
1406 [cargo/3885]: https://github.com/rust-lang/cargo/pull/3885
1407 [cargo/3901]: https://github.com/rust-lang/cargo/pull/3901
1408 [cargo/3952]: https://github.com/rust-lang/cargo/pull/3952
1411 Version 1.17.0 (2017-04-27)
1412 ===========================
1417 * [The lifetime of statics and consts defaults to `'static`][39265]. [RFC 1623]
1418 * [Fields of structs may be initialized without duplicating the field/variable
1419 names][39761]. [RFC 1682]
1420 * [`Self` may be included in the `where` clause of `impls`][38864]. [RFC 1647]
1421 * [When coercing to an unsized type lifetimes must be equal][40319]. That is,
1422 there is no subtyping between `T` and `U` when `T: Unsize<U>`. For example,
1423 coercing `&mut [&'a X; N]` to `&mut [&'b X]` requires `'a` be equal to
1424 `'b`. Soundness fix.
1425 * [Values passed to the indexing operator, `[]`, automatically coerce][40166]
1426 * [Static variables may contain references to other statics][40027]
1431 * [Exit quickly on only `--emit dep-info`][40336]
1432 * [Make `-C relocation-model` more correctly determine whether the linker
1433 creates a position-independent executable][40245]
1434 * [Add `-C overflow-checks` to directly control whether integer overflow
1436 * [The rustc type checker now checks items on demand instead of in a single
1437 in-order pass][40008]. This is mostly an internal refactoring in support of
1438 future work, including incremental type checking, but also resolves [RFC
1439 1647], allowing `Self` to appear in `impl` `where` clauses.
1440 * [Optimize vtable loads][39995]
1441 * [Turn off vectorization for Emscripten targets][39990]
1442 * [Provide suggestions for unknown macros imported with `use`][39953]
1443 * [Fix ICEs in path resolution][39939]
1444 * [Strip exception handling code on Emscripten when `panic=abort`][39193]
1445 * [Add clearer error message using `&str + &str`][39116]
1456 * [`Ordering::then`]
1457 * [`Ordering::then_with`]
1458 * [`BTreeMap::range`]
1459 * [`BTreeMap::range_mut`]
1460 * [`collections::Bound`]
1461 * [`process::abort`]
1462 * [`ptr::read_unaligned`]
1463 * [`ptr::write_unaligned`]
1464 * [`Result::expect_err`]
1467 * [`Cell::into_inner`]
1473 * [`BTreeMap` and `BTreeSet` can iterate over ranges][27787]
1474 * [`Cell` can store non-`Copy` types][39793]. [RFC 1651]
1475 * [`String` implements `FromIterator<&char>`][40028]
1476 * `Box` [implements][40009] a number of new conversions:
1477 `From<Box<str>> for String`,
1478 `From<Box<[T]>> for Vec<T>`,
1479 `From<Box<CStr>> for CString`,
1480 `From<Box<OsStr>> for OsString`,
1481 `From<Box<Path>> for PathBuf`,
1482 `Into<Box<str>> for String`,
1483 `Into<Box<[T]>> for Vec<T>`,
1484 `Into<Box<CStr>> for CString`,
1485 `Into<Box<OsStr>> for OsString`,
1486 `Into<Box<Path>> for PathBuf`,
1487 `Default for Box<str>`,
1488 `Default for Box<CStr>`,
1489 `Default for Box<OsStr>`,
1490 `From<&CStr> for Box<CStr>`,
1491 `From<&OsStr> for Box<OsStr>`,
1492 `From<&Path> for Box<Path>`
1493 * [`ffi::FromBytesWithNulError` implements `Error` and `Display`][39960]
1494 * [Specialize `PartialOrd<A> for [A] where A: Ord`][39642]
1495 * [Slightly optimize `slice::sort`][39538]
1496 * [Add `ToString` trait specialization for `Cow<'a, str>` and `String`][39440]
1497 * [`Box<[T]>` implements `From<&[T]> where T: Copy`,
1498 `Box<str>` implements `From<&str>`][39438]
1499 * [`IpAddr` implements `From` for various arrays. `SocketAddr` implements
1500 `From<(I, u16)> where I: Into<IpAddr>`][39372]
1501 * [`format!` estimates the needed capacity before writing a string][39356]
1502 * [Support unprivileged symlink creation in Windows][38921]
1503 * [`PathBuf` implements `Default`][38764]
1504 * [Implement `PartialEq<[A]>` for `VecDeque<A>`][38661]
1505 * [`HashMap` resizes adaptively][38368] to guard against DOS attacks
1506 and poor hash functions.
1511 * [Add `cargo check --all`][cargo/3731]
1512 * [Add an option to ignore SSL revocation checking][cargo/3699]
1513 * [Add `cargo run --package`][cargo/3691]
1514 * [Add `required_features`][cargo/3667]
1515 * [Assume `build.rs` is a build script][cargo/3664]
1516 * [Find workspace via `workspace_root` link in containing member][cargo/3562]
1521 * [Documentation is rendered with mdbook instead of the obsolete, in-tree
1523 * [The "Unstable Book" documents nightly-only features][ubook]
1524 * [Improve the style of the sidebar in rustdoc output][40265]
1525 * [Configure build correctly on 64-bit CPU's with the armhf ABI][40261]
1526 * [Fix MSP430 breakage due to `i128`][40257]
1527 * [Preliminary Solaris/SPARCv9 support][39903]
1528 * [`rustc` is linked statically on Windows MSVC targets][39837], allowing it to
1529 run without installing the MSVC runtime.
1530 * [`rustdoc --test` includes file names in test names][39788]
1531 * This release includes builds of `std` for `sparc64-unknown-linux-gnu`,
1532 `aarch64-unknown-linux-fuchsia`, and `x86_64-unknown-linux-fuchsia`.
1533 * [Initial support for `aarch64-unknown-freebsd`][39491]
1534 * [Initial support for `i686-unknown-netbsd`][39426]
1535 * [This release no longer includes the old makefile build system][39431]. Rust
1536 is built with a custom build system, written in Rust, and with Cargo.
1537 * [Add Debug implementations for libcollection structs][39002]
1538 * [`TypeId` implements `PartialOrd` and `Ord`][38981]
1539 * [`--test-threads=0` produces an error][38945]
1540 * [`rustup` installs documentation by default][40526]
1541 * [The Rust source includes NatVis visualizations][39843]. These can be used by
1542 WinDbg and Visual Studio to improve the debugging experience.
1547 * [Rust 1.17 does not correctly detect the MSVC 2017 linker][38584]. As a
1548 workaround, either use MSVC 2015 or run vcvars.bat.
1549 * [When coercing to an unsized type lifetimes must be equal][40319]. That is,
1550 disallow subtyping between `T` and `U` when `T: Unsize<U>`, e.g. coercing
1551 `&mut [&'a X; N]` to `&mut [&'b X]` requires `'a` be equal to `'b`. Soundness
1553 * [`format!` and `Display::to_string` panic if an underlying formatting
1554 implementation returns an error][40117]. Previously the error was silently
1555 ignored. It is incorrect for `write_fmt` to return an error when writing
1557 * [In-tree crates are verified to be unstable][39851]. Previously, some minor
1558 crates were marked stable and could be accessed from the stable toolchain.
1559 * [Rust git source no longer includes vendored crates][39728]. Those that need
1560 to build with vendored crates should build from release tarballs.
1561 * [Fix inert attributes from `proc_macro_derives`][39572]
1562 * [During crate resolution, rustc prefers a crate in the sysroot if two crates
1563 are otherwise identical][39518]. Unlikely to be encountered outside the Rust
1565 * [Fixed bugs around how type inference interacts with dead-code][39485]. The
1566 existing code generally ignores the type of dead-code unless a type-hint is
1567 provided; this can cause surprising inference interactions particularly around
1568 defaulting. The new code uniformly ignores the result type of dead-code.
1569 * [Tuple-struct constructors with private fields are no longer visible][38932]
1570 * [Lifetime parameters that do not appear in the arguments are now considered
1571 early-bound][38897], resolving a soundness bug (#[32330]). The
1572 `hr_lifetime_in_assoc_type` future-compatibility lint has been in effect since
1574 * [rustdoc: fix doctests with non-feature crate attributes][38161]
1575 * [Make transmuting from fn item types to pointer-sized types a hard
1578 [27787]: https://github.com/rust-lang/rust/issues/27787
1579 [32330]: https://github.com/rust-lang/rust/issues/32330
1580 [34198]: https://github.com/rust-lang/rust/pull/34198
1581 [38161]: https://github.com/rust-lang/rust/pull/38161
1582 [38368]: https://github.com/rust-lang/rust/pull/38368
1583 [38584]: https://github.com/rust-lang/rust/issues/38584
1584 [38661]: https://github.com/rust-lang/rust/pull/38661
1585 [38764]: https://github.com/rust-lang/rust/pull/38764
1586 [38864]: https://github.com/rust-lang/rust/issues/38864
1587 [38897]: https://github.com/rust-lang/rust/pull/38897
1588 [38921]: https://github.com/rust-lang/rust/pull/38921
1589 [38932]: https://github.com/rust-lang/rust/pull/38932
1590 [38945]: https://github.com/rust-lang/rust/pull/38945
1591 [38981]: https://github.com/rust-lang/rust/pull/38981
1592 [39002]: https://github.com/rust-lang/rust/pull/39002
1593 [39116]: https://github.com/rust-lang/rust/pull/39116
1594 [39193]: https://github.com/rust-lang/rust/pull/39193
1595 [39265]: https://github.com/rust-lang/rust/pull/39265
1596 [39356]: https://github.com/rust-lang/rust/pull/39356
1597 [39372]: https://github.com/rust-lang/rust/pull/39372
1598 [39426]: https://github.com/rust-lang/rust/pull/39426
1599 [39431]: https://github.com/rust-lang/rust/pull/39431
1600 [39438]: https://github.com/rust-lang/rust/pull/39438
1601 [39440]: https://github.com/rust-lang/rust/pull/39440
1602 [39485]: https://github.com/rust-lang/rust/pull/39485
1603 [39491]: https://github.com/rust-lang/rust/pull/39491
1604 [39518]: https://github.com/rust-lang/rust/pull/39518
1605 [39538]: https://github.com/rust-lang/rust/pull/39538
1606 [39572]: https://github.com/rust-lang/rust/pull/39572
1607 [39633]: https://github.com/rust-lang/rust/pull/39633
1608 [39642]: https://github.com/rust-lang/rust/pull/39642
1609 [39728]: https://github.com/rust-lang/rust/pull/39728
1610 [39761]: https://github.com/rust-lang/rust/pull/39761
1611 [39788]: https://github.com/rust-lang/rust/pull/39788
1612 [39793]: https://github.com/rust-lang/rust/pull/39793
1613 [39837]: https://github.com/rust-lang/rust/pull/39837
1614 [39843]: https://github.com/rust-lang/rust/pull/39843
1615 [39851]: https://github.com/rust-lang/rust/pull/39851
1616 [39903]: https://github.com/rust-lang/rust/pull/39903
1617 [39939]: https://github.com/rust-lang/rust/pull/39939
1618 [39953]: https://github.com/rust-lang/rust/pull/39953
1619 [39960]: https://github.com/rust-lang/rust/pull/39960
1620 [39990]: https://github.com/rust-lang/rust/pull/39990
1621 [39995]: https://github.com/rust-lang/rust/pull/39995
1622 [40008]: https://github.com/rust-lang/rust/pull/40008
1623 [40009]: https://github.com/rust-lang/rust/pull/40009
1624 [40027]: https://github.com/rust-lang/rust/pull/40027
1625 [40028]: https://github.com/rust-lang/rust/pull/40028
1626 [40037]: https://github.com/rust-lang/rust/pull/40037
1627 [40117]: https://github.com/rust-lang/rust/pull/40117
1628 [40166]: https://github.com/rust-lang/rust/pull/40166
1629 [40245]: https://github.com/rust-lang/rust/pull/40245
1630 [40257]: https://github.com/rust-lang/rust/pull/40257
1631 [40261]: https://github.com/rust-lang/rust/pull/40261
1632 [40265]: https://github.com/rust-lang/rust/pull/40265
1633 [40319]: https://github.com/rust-lang/rust/pull/40319
1634 [40336]: https://github.com/rust-lang/rust/pull/40336
1635 [40526]: https://github.com/rust-lang/rust/pull/40526
1636 [RFC 1623]: https://github.com/rust-lang/rfcs/blob/master/text/1623-static.md
1637 [RFC 1647]: https://github.com/rust-lang/rfcs/blob/master/text/1647-allow-self-in-where-clauses.md
1638 [RFC 1651]: https://github.com/rust-lang/rfcs/blob/master/text/1651-movecell.md
1639 [RFC 1682]: https://github.com/rust-lang/rfcs/blob/master/text/1682-field-init-shorthand.md
1640 [`Arc::from_raw`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.from_raw
1641 [`Arc::into_raw`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.into_raw
1642 [`Arc::ptr_eq`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.ptr_eq
1643 [`BTreeMap::range_mut`]: https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.range_mut
1644 [`BTreeMap::range`]: https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.range
1645 [`Cell::into_inner`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.into_inner
1646 [`Cell::replace`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.replace
1647 [`Cell::swap`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.swap
1648 [`Cell::take`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.take
1649 [`Ordering::then_with`]: https://doc.rust-lang.org/std/cmp/enum.Ordering.html#method.then_with
1650 [`Ordering::then`]: https://doc.rust-lang.org/std/cmp/enum.Ordering.html#method.then
1651 [`Rc::from_raw`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.from_raw
1652 [`Rc::into_raw`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.into_raw
1653 [`Rc::ptr_eq`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.ptr_eq
1654 [`Result::expect_err`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.expect_err
1655 [`collections::Bound`]: https://doc.rust-lang.org/std/collections/enum.Bound.html
1656 [`process::abort`]: https://doc.rust-lang.org/std/process/fn.abort.html
1657 [`ptr::read_unaligned`]: https://doc.rust-lang.org/std/ptr/fn.read_unaligned.html
1658 [`ptr::write_unaligned`]: https://doc.rust-lang.org/std/ptr/fn.write_unaligned.html
1659 [cargo/3562]: https://github.com/rust-lang/cargo/pull/3562
1660 [cargo/3664]: https://github.com/rust-lang/cargo/pull/3664
1661 [cargo/3667]: https://github.com/rust-lang/cargo/pull/3667
1662 [cargo/3691]: https://github.com/rust-lang/cargo/pull/3691
1663 [cargo/3699]: https://github.com/rust-lang/cargo/pull/3699
1664 [cargo/3731]: https://github.com/rust-lang/cargo/pull/3731
1665 [mdbook]: https://crates.io/crates/mdbook
1666 [ubook]: https://doc.rust-lang.org/unstable-book/
1669 Version 1.16.0 (2017-03-16)
1670 ===========================
1675 * [The compiler's `dead_code` lint now accounts for type aliases][38051].
1676 * [Uninhabitable enums (those without any variants) no longer permit wildcard
1677 match patterns][38069]
1678 * [Clean up semantics of `self` in an import list][38313]
1679 * [`Self` may appear in `impl` headers][38920]
1680 * [`Self` may appear in struct expressions][39282]
1685 * [`rustc` now supports `--emit=metadata`, which causes rustc to emit
1686 a `.rmeta` file containing only crate metadata][38571]. This can be
1687 used by tools like the Rust Language Service to perform
1688 metadata-only builds.
1689 * [Levenshtein based typo suggestions now work in most places, while
1690 previously they worked only for fields and sometimes for local
1691 variables][38927]. Together with the overhaul of "no
1692 resolution"/"unexpected resolution" errors (#[38154]) they result in
1693 large and systematic improvement in resolution diagnostics.
1694 * [Fix `transmute::<T, U>` where `T` requires a bigger alignment than
1696 * [rustc: use -Xlinker when specifying an rpath with ',' in it][38798]
1697 * [`rustc` no longer attempts to provide "consider using an explicit
1698 lifetime" suggestions][37057]. They were inaccurate.
1703 * [`VecDeque::truncate`]
1704 * [`VecDeque::resize`]
1705 * [`String::insert_str`]
1706 * [`Duration::checked_add`]
1707 * [`Duration::checked_sub`]
1708 * [`Duration::checked_div`]
1709 * [`Duration::checked_mul`]
1712 * [`SocketAddr::is_ipv4`]
1713 * [`SocketAddr::is_ipv6`]
1714 * [`IpAddr::is_ipv4`]
1715 * [`IpAddr::is_ipv6`]
1717 * [`Vec::dedup_by_key`]
1718 * [`Result::unwrap_or_default`]
1719 * [`<*const T>::wrapping_offset`]
1720 * [`<*mut T>::wrapping_offset`]
1721 * `CommandExt::creation_flags`
1722 * [`File::set_permissions`]
1723 * [`String::split_off`]
1728 * [`[T]::binary_search` and `[T]::binary_search_by_key` now take
1729 their argument by `Borrow` parameter][37761]
1730 * [All public types in std implement `Debug`][38006]
1731 * [`IpAddr` implements `From<Ipv4Addr>` and `From<Ipv6Addr>`][38327]
1732 * [`Ipv6Addr` implements `From<[u16; 8]>`][38131]
1733 * [Ctrl-Z returns from `Stdin.read()` when reading from the console on
1735 * [std: Fix partial writes in `LineWriter`][38062]
1736 * [std: Clamp max read/write sizes on Unix][38062]
1737 * [Use more specific panic message for `&str` slicing errors][38066]
1738 * [`TcpListener::set_only_v6` is deprecated][38304]. This
1739 functionality cannot be achieved in std currently.
1740 * [`writeln!`, like `println!`, now accepts a form with no string
1741 or formatting arguments, to just print a newline][38469]
1742 * [Implement `iter::Sum` and `iter::Product` for `Result`][38580]
1743 * [Reduce the size of static data in `std_unicode::tables`][38781]
1744 * [`char::EscapeDebug`, `EscapeDefault`, `EscapeUnicode`,
1745 `CaseMappingIter`, `ToLowercase`, `ToUppercase`, implement
1747 * [`Duration` implements `Sum`][38712]
1748 * [`String` implements `ToSocketAddrs`][39048]
1753 * [The `cargo check` command does a type check of a project without
1754 building it][cargo/3296]
1755 * [crates.io will display CI badges from Travis and AppVeyor, if
1756 specified in Cargo.toml][cargo/3546]
1757 * [crates.io will display categories listed in Cargo.toml][cargo/3301]
1758 * [Compilation profiles accept integer values for `debug`, in addition
1759 to `true` and `false`. These are passed to `rustc` as the value to
1760 `-C debuginfo`][cargo/3534]
1761 * [Implement `cargo --version --verbose`][cargo/3604]
1762 * [All builds now output 'dep-info' build dependencies compatible with
1763 make and ninja][cargo/3557]
1764 * [Build all workspace members with `build --all`][cargo/3511]
1765 * [Document all workspace members with `doc --all`][cargo/3515]
1766 * [Path deps outside workspace are not members][cargo/3443]
1771 * [`rustdoc` has a `--sysroot` argument that, like `rustc`, specifies
1772 the path to the Rust implementation][38589]
1773 * [The `armv7-linux-androideabi` target no longer enables NEON
1774 extensions, per Google's ABI guide][38413]
1775 * [The stock standard library can be compiled for Redox OS][38401]
1776 * [Rust has initial SPARC support][38726]. Tier 3. No builds
1778 * [Rust has experimental support for Nvidia PTX][38559]. Tier 3. No
1780 * [Fix backtraces on i686-pc-windows-gnu by disabling FPO][39379]
1785 * [Uninhabitable enums (those without any variants) no longer permit wildcard
1786 match patterns][38069]
1787 * In this release, references to uninhabited types can not be
1788 pattern-matched. This was accidentally allowed in 1.15.
1789 * [The compiler's `dead_code` lint now accounts for type aliases][38051].
1790 * [Ctrl-Z returns from `Stdin.read()` when reading from the console on
1792 * [Clean up semantics of `self` in an import list][38313]
1793 * Reimplemented lifetime elision. This change was almost entirely compatible
1794 with existing code, but it did close a number of small bugs and loopholes,
1795 as well as being more accepting in some other [cases][41105].
1797 [37057]: https://github.com/rust-lang/rust/pull/37057
1798 [37761]: https://github.com/rust-lang/rust/pull/37761
1799 [38006]: https://github.com/rust-lang/rust/pull/38006
1800 [38051]: https://github.com/rust-lang/rust/pull/38051
1801 [38062]: https://github.com/rust-lang/rust/pull/38062
1802 [38062]: https://github.com/rust-lang/rust/pull/38622
1803 [38066]: https://github.com/rust-lang/rust/pull/38066
1804 [38069]: https://github.com/rust-lang/rust/pull/38069
1805 [38131]: https://github.com/rust-lang/rust/pull/38131
1806 [38154]: https://github.com/rust-lang/rust/pull/38154
1807 [38274]: https://github.com/rust-lang/rust/pull/38274
1808 [38304]: https://github.com/rust-lang/rust/pull/38304
1809 [38313]: https://github.com/rust-lang/rust/pull/38313
1810 [38314]: https://github.com/rust-lang/rust/pull/38314
1811 [38327]: https://github.com/rust-lang/rust/pull/38327
1812 [38401]: https://github.com/rust-lang/rust/pull/38401
1813 [38413]: https://github.com/rust-lang/rust/pull/38413
1814 [38469]: https://github.com/rust-lang/rust/pull/38469
1815 [38559]: https://github.com/rust-lang/rust/pull/38559
1816 [38571]: https://github.com/rust-lang/rust/pull/38571
1817 [38580]: https://github.com/rust-lang/rust/pull/38580
1818 [38589]: https://github.com/rust-lang/rust/pull/38589
1819 [38670]: https://github.com/rust-lang/rust/pull/38670
1820 [38712]: https://github.com/rust-lang/rust/pull/38712
1821 [38726]: https://github.com/rust-lang/rust/pull/38726
1822 [38781]: https://github.com/rust-lang/rust/pull/38781
1823 [38798]: https://github.com/rust-lang/rust/pull/38798
1824 [38909]: https://github.com/rust-lang/rust/pull/38909
1825 [38920]: https://github.com/rust-lang/rust/pull/38920
1826 [38927]: https://github.com/rust-lang/rust/pull/38927
1827 [39048]: https://github.com/rust-lang/rust/pull/39048
1828 [39282]: https://github.com/rust-lang/rust/pull/39282
1829 [39379]: https://github.com/rust-lang/rust/pull/39379
1830 [41105]: https://github.com/rust-lang/rust/issues/41105
1831 [`<*const T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset
1832 [`<*mut T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset
1833 [`Duration::checked_add`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_add
1834 [`Duration::checked_div`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_div
1835 [`Duration::checked_mul`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_mul
1836 [`Duration::checked_sub`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_sub
1837 [`File::set_permissions`]: https://doc.rust-lang.org/std/fs/struct.File.html#method.set_permissions
1838 [`IpAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv4
1839 [`IpAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv6
1840 [`Result::unwrap_or_default`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.unwrap_or_default
1841 [`SocketAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv4
1842 [`SocketAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv6
1843 [`String::insert_str`]: https://doc.rust-lang.org/std/string/struct.String.html#method.insert_str
1844 [`String::split_off`]: https://doc.rust-lang.org/std/string/struct.String.html#method.split_off
1845 [`Vec::dedup_by_key`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by_key
1846 [`Vec::dedup_by`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by
1847 [`VecDeque::resize`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.resize
1848 [`VecDeque::truncate`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.truncate
1849 [`str::repeat`]: https://doc.rust-lang.org/std/primitive.str.html#method.repeat
1850 [`str::replacen`]: https://doc.rust-lang.org/std/primitive.str.html#method.replacen
1851 [cargo/3296]: https://github.com/rust-lang/cargo/pull/3296
1852 [cargo/3301]: https://github.com/rust-lang/cargo/pull/3301
1853 [cargo/3443]: https://github.com/rust-lang/cargo/pull/3443
1854 [cargo/3511]: https://github.com/rust-lang/cargo/pull/3511
1855 [cargo/3515]: https://github.com/rust-lang/cargo/pull/3515
1856 [cargo/3534]: https://github.com/rust-lang/cargo/pull/3534
1857 [cargo/3546]: https://github.com/rust-lang/cargo/pull/3546
1858 [cargo/3557]: https://github.com/rust-lang/cargo/pull/3557
1859 [cargo/3604]: https://github.com/rust-lang/cargo/pull/3604
1860 [RFC 1623]: https://github.com/rust-lang/rfcs/blob/master/text/1623-static.md
1863 Version 1.15.1 (2017-02-09)
1864 ===========================
1866 * [Fix IntoIter::as_mut_slice's signature][39466]
1867 * [Compile compiler builtins with `-fPIC` on 32-bit platforms][39523]
1869 [39466]: https://github.com/rust-lang/rust/pull/39466
1870 [39523]: https://github.com/rust-lang/rust/pull/39523
1873 Version 1.15.0 (2017-02-02)
1874 ===========================
1879 * Basic procedural macros allowing custom `#[derive]`, aka "macros 1.1", are
1880 stable. This allows popular code-generating crates like Serde and Diesel to
1881 work ergonomically. [RFC 1681].
1882 * [Tuple structs may be empty. Unary and empty tuple structs may be instantiated
1883 with curly braces][36868]. Part of [RFC 1506].
1884 * [A number of minor changes to name resolution have been activated][37127].
1885 They add up to more consistent semantics, allowing for future evolution of
1886 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
1887 details of what is different. The breaking changes here have been transitioned
1888 through the [`legacy_imports`] lint since 1.14, with no known regressions.
1889 * [In `macro_rules`, `path` fragments can now be parsed as type parameter
1891 * [`?Sized` can be used in `where` clauses][37791]
1892 * [There is now a limit on the size of monomorphized types and it can be
1893 modified with the `#![type_size_limit]` crate attribute, similarly to
1894 the `#![recursion_limit]` attribute][37789]
1899 * [On Windows, the compiler will apply dllimport attributes when linking to
1900 extern functions][37973]. Additional attributes and flags can control which
1901 library kind is linked and its name. [RFC 1717].
1902 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
1903 * [The `--test` flag works with procedural macro crates][38107]
1904 * [Fix `extern "aapcs" fn` ABI][37814]
1905 * [The `-C no-stack-check` flag is deprecated][37636]. It does nothing.
1906 * [The `format!` expander recognizes incorrect `printf` and shell-style
1907 formatting directives and suggests the correct format][37613].
1908 * [Only report one error for all unused imports in an import list][37456]
1910 Compiler Performance
1911 --------------------
1913 * [Avoid unnecessary `mk_ty` calls in `Ty::super_fold_with`][37705]
1914 * [Avoid more unnecessary `mk_ty` calls in `Ty::super_fold_with`][37979]
1915 * [Don't clone in `UnificationTable::probe`][37848]
1916 * [Remove `scope_auxiliary` to cut RSS by 10%][37764]
1917 * [Use small vectors in type walker][37760]
1918 * [Macro expansion performance was improved][37701]
1919 * [Change `HirVec<P<T>>` to `HirVec<T>` in `hir::Expr`][37642]
1920 * [Replace FNV with a faster hash function][37229]
1925 * [`std::iter::Iterator::min_by`]
1926 * [`std::iter::Iterator::max_by`]
1927 * [`std::os::*::fs::FileExt`]
1928 * [`std::sync::atomic::Atomic*::get_mut`]
1929 * [`std::sync::atomic::Atomic*::into_inner`]
1930 * [`std::vec::IntoIter::as_slice`]
1931 * [`std::vec::IntoIter::as_mut_slice`]
1932 * [`std::sync::mpsc::Receiver::try_iter`]
1933 * [`std::os::unix::process::CommandExt::before_exec`]
1934 * [`std::rc::Rc::strong_count`]
1935 * [`std::rc::Rc::weak_count`]
1936 * [`std::sync::Arc::strong_count`]
1937 * [`std::sync::Arc::weak_count`]
1938 * [`std::char::encode_utf8`]
1939 * [`std::char::encode_utf16`]
1940 * [`std::cell::Ref::clone`]
1941 * [`std::io::Take::into_inner`]
1946 * [The standard sorting algorithm has been rewritten for dramatic performance
1947 improvements][38192]. It is a hybrid merge sort, drawing influences from
1948 Timsort. Previously it was a naive merge sort.
1949 * [`Iterator::nth` no longer has a `Sized` bound][38134]
1950 * [`Extend<&T>` is specialized for `Vec` where `T: Copy`][38182] to improve
1952 * [`chars().count()` is much faster][37888] and so are [`chars().last()`
1953 and `char_indices().last()`][37882]
1954 * [Fix ARM Objective-C ABI in `std::env::args`][38146]
1955 * [Chinese characters display correctly in `fmt::Debug`][37855]
1956 * [Derive `Default` for `Duration`][37699]
1957 * [Support creation of anonymous pipes on WinXP/2k][37677]
1958 * [`mpsc::RecvTimeoutError` implements `Error`][37527]
1959 * [Don't pass overlapped handles to processes][38835]
1964 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
1965 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
1966 should instead check the variable at runtime with `std::env`. That the value
1967 was set at build time was a bug, and incorrect when cross-compiling. This
1968 change is known to cause breakage.
1969 * [Add `--all` flag to `cargo test`][cargo/3221]
1970 * [Compile statically against the MSVC CRT][cargo/3363]
1971 * [Mix feature flags into fingerprint/metadata shorthash][cargo/3102]
1972 * [Link OpenSSL statically on OSX][cargo/3311]
1973 * [Apply new fingerprinting to build dir outputs][cargo/3310]
1974 * [Test for bad path overrides with summaries][cargo/3336]
1975 * [Require `cargo install --vers` to take a semver version][cargo/3338]
1976 * [Fix retrying crate downloads for network errors][cargo/3348]
1977 * [Implement string lookup for `build.rustflags` config key][cargo/3356]
1978 * [Emit more info on --message-format=json][cargo/3319]
1979 * [Assume `build.rs` in the same directory as `Cargo.toml` is a build script][cargo/3361]
1980 * [Don't ignore errors in workspace manifest][cargo/3409]
1981 * [Fix `--message-format JSON` when rustc emits non-JSON warnings][cargo/3410]
1986 * [Test runners (binaries built with `--test`) now support a `--list` argument
1987 that lists the tests it contains][38185]
1988 * [Test runners now support a `--exact` argument that makes the test filter
1989 match exactly, instead of matching only a substring of the test name][38181]
1990 * [rustdoc supports a `--playground-url` flag][37763]
1991 * [rustdoc provides more details about `#[should_panic]` errors][37749]
1996 * [The Rust build system is now written in Rust][37817]. The Makefiles may
1997 continue to be used in this release by passing `--disable-rustbuild` to the
1998 configure script, but they will be deleted soon. Note that the new build
1999 system uses a different on-disk layout that will likely affect any scripts
2001 * [Rust supports i686-unknown-openbsd][38086]. Tier 3 support. No testing or
2003 * [Rust supports the MSP430][37627]. Tier 3 support. No testing or releases.
2004 * [Rust supports the ARMv5TE architecture][37615]. Tier 3 support. No testing or
2010 * [A number of minor changes to name resolution have been activated][37127].
2011 They add up to more consistent semantics, allowing for future evolution of
2012 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
2013 details of what is different. The breaking changes here have been transitioned
2014 through the [`legacy_imports`] lint since 1.14, with no known regressions.
2015 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
2016 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
2017 should instead check the variable at runtime with `std::env`. That the value
2018 was set at build time was a bug, and incorrect when cross-compiling. This
2019 change is known to cause breakage.
2020 * [Higher-ranked lifetimes are no longer allowed to appear _only_ in associated
2021 types][33685]. The [`hr_lifetime_in_assoc_type` lint] has been a warning since
2022 1.10 and is now an error by default. It will become a hard error in the near
2024 * [The semantics relating modules to file system directories are changing in
2025 minor ways][37602]. This is captured in the new `legacy_directory_ownership`
2026 lint, which is a warning in this release, and will become a hard error in the
2028 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
2029 * [Once `Peekable` peeks a `None` it will return that `None` without re-querying
2030 the underlying iterator][37834]
2032 ["changes"]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md#changes-to-name-resolution-rules
2033 [33685]: https://github.com/rust-lang/rust/issues/33685
2034 [36868]: https://github.com/rust-lang/rust/pull/36868
2035 [37127]: https://github.com/rust-lang/rust/pull/37127
2036 [37229]: https://github.com/rust-lang/rust/pull/37229
2037 [37456]: https://github.com/rust-lang/rust/pull/37456
2038 [37527]: https://github.com/rust-lang/rust/pull/37527
2039 [37602]: https://github.com/rust-lang/rust/pull/37602
2040 [37613]: https://github.com/rust-lang/rust/pull/37613
2041 [37615]: https://github.com/rust-lang/rust/pull/37615
2042 [37636]: https://github.com/rust-lang/rust/pull/37636
2043 [37627]: https://github.com/rust-lang/rust/pull/37627
2044 [37642]: https://github.com/rust-lang/rust/pull/37642
2045 [37677]: https://github.com/rust-lang/rust/pull/37677
2046 [37699]: https://github.com/rust-lang/rust/pull/37699
2047 [37701]: https://github.com/rust-lang/rust/pull/37701
2048 [37705]: https://github.com/rust-lang/rust/pull/37705
2049 [37749]: https://github.com/rust-lang/rust/pull/37749
2050 [37760]: https://github.com/rust-lang/rust/pull/37760
2051 [37763]: https://github.com/rust-lang/rust/pull/37763
2052 [37764]: https://github.com/rust-lang/rust/pull/37764
2053 [37789]: https://github.com/rust-lang/rust/pull/37789
2054 [37791]: https://github.com/rust-lang/rust/pull/37791
2055 [37814]: https://github.com/rust-lang/rust/pull/37814
2056 [37817]: https://github.com/rust-lang/rust/pull/37817
2057 [37834]: https://github.com/rust-lang/rust/pull/37834
2058 [37848]: https://github.com/rust-lang/rust/pull/37848
2059 [37855]: https://github.com/rust-lang/rust/pull/37855
2060 [37882]: https://github.com/rust-lang/rust/pull/37882
2061 [37888]: https://github.com/rust-lang/rust/pull/37888
2062 [37973]: https://github.com/rust-lang/rust/pull/37973
2063 [37979]: https://github.com/rust-lang/rust/pull/37979
2064 [38086]: https://github.com/rust-lang/rust/pull/38086
2065 [38107]: https://github.com/rust-lang/rust/pull/38107
2066 [38117]: https://github.com/rust-lang/rust/pull/38117
2067 [38134]: https://github.com/rust-lang/rust/pull/38134
2068 [38146]: https://github.com/rust-lang/rust/pull/38146
2069 [38181]: https://github.com/rust-lang/rust/pull/38181
2070 [38182]: https://github.com/rust-lang/rust/pull/38182
2071 [38185]: https://github.com/rust-lang/rust/pull/38185
2072 [38192]: https://github.com/rust-lang/rust/pull/38192
2073 [38279]: https://github.com/rust-lang/rust/pull/38279
2074 [38835]: https://github.com/rust-lang/rust/pull/38835
2075 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
2076 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
2077 [RFC 1560]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md
2078 [RFC 1681]: https://github.com/rust-lang/rfcs/blob/master/text/1681-macros-1.1.md
2079 [RFC 1717]: https://github.com/rust-lang/rfcs/blob/master/text/1717-dllimport.md
2080 [`hr_lifetime_in_assoc_type` lint]: https://github.com/rust-lang/rust/issues/33685
2081 [`legacy_imports`]: https://github.com/rust-lang/rust/pull/38271
2082 [cargo/3102]: https://github.com/rust-lang/cargo/pull/3102
2083 [cargo/3221]: https://github.com/rust-lang/cargo/pull/3221
2084 [cargo/3310]: https://github.com/rust-lang/cargo/pull/3310
2085 [cargo/3311]: https://github.com/rust-lang/cargo/pull/3311
2086 [cargo/3319]: https://github.com/rust-lang/cargo/pull/3319
2087 [cargo/3336]: https://github.com/rust-lang/cargo/pull/3336
2088 [cargo/3338]: https://github.com/rust-lang/cargo/pull/3338
2089 [cargo/3348]: https://github.com/rust-lang/cargo/pull/3348
2090 [cargo/3356]: https://github.com/rust-lang/cargo/pull/3356
2091 [cargo/3361]: https://github.com/rust-lang/cargo/pull/3361
2092 [cargo/3363]: https://github.com/rust-lang/cargo/pull/3363
2093 [cargo/3368]: https://github.com/rust-lang/cargo/issues/3368
2094 [cargo/3409]: https://github.com/rust-lang/cargo/pull/3409
2095 [cargo/3410]: https://github.com/rust-lang/cargo/pull/3410
2096 [`std::iter::Iterator::min_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.min_by
2097 [`std::iter::Iterator::max_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.max_by
2098 [`std::os::*::fs::FileExt`]: https://doc.rust-lang.org/std/os/unix/fs/trait.FileExt.html
2099 [`std::sync::atomic::Atomic*::get_mut`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.get_mut
2100 [`std::sync::atomic::Atomic*::into_inner`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.into_inner
2101 [`std::vec::IntoIter::as_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_slice
2102 [`std::vec::IntoIter::as_mut_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_mut_slice
2103 [`std::sync::mpsc::Receiver::try_iter`]: https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.try_iter
2104 [`std::os::unix::process::CommandExt::before_exec`]: https://doc.rust-lang.org/std/os/unix/process/trait.CommandExt.html#tymethod.before_exec
2105 [`std::rc::Rc::strong_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.strong_count
2106 [`std::rc::Rc::weak_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.weak_count
2107 [`std::sync::Arc::strong_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.strong_count
2108 [`std::sync::Arc::weak_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.weak_count
2109 [`std::char::encode_utf8`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf8
2110 [`std::char::encode_utf16`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf16
2111 [`std::cell::Ref::clone`]: https://doc.rust-lang.org/std/cell/struct.Ref.html#method.clone
2112 [`std::io::Take::into_inner`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.into_inner
2115 Version 1.14.0 (2016-12-22)
2116 ===========================
2121 * [`..` matches multiple tuple fields in enum variants, structs
2122 and tuples][36843]. [RFC 1492].
2123 * [Safe `fn` items can be coerced to `unsafe fn` pointers][37389]
2124 * [`use *` and `use ::*` both glob-import from the crate root][37367]
2125 * [It's now possible to call a `Vec<Box<Fn()>>` without explicit
2126 dereferencing][36822]
2131 * [Mark enums with non-zero discriminant as non-zero][37224]
2132 * [Lower-case `static mut` names are linted like other
2133 statics and consts][37162]
2134 * [Fix ICE on some macros in const integer positions
2135 (e.g. `[u8; m!()]`)][36819]
2136 * [Improve error message and snippet for "did you mean `x`"][36798]
2137 * [Add a panic-strategy field to the target specification][36794]
2138 * [Include LLVM version in `--version --verbose`][37200]
2140 Compile-time Optimizations
2141 --------------------------
2143 * [Improve macro expansion performance][37569]
2144 * [Shrink `Expr_::ExprInlineAsm`][37445]
2145 * [Replace all uses of SHA-256 with BLAKE2b][37439]
2146 * [Reduce the number of bytes hashed by `IchHasher`][37427]
2147 * [Avoid more allocations when compiling html5ever][37373]
2148 * [Use `SmallVector` in `CombineFields::instantiate`][37322]
2149 * [Avoid some allocations in the macro parser][37318]
2150 * [Use a faster deflate setting][37298]
2151 * [Add `ArrayVec` and `AccumulateVec` to reduce heap allocations
2152 during interning of slices][37270]
2153 * [Optimize `write_metadata`][37267]
2154 * [Don't process obligation forest cycles when stalled][37231]
2155 * [Avoid many `CrateConfig` clones][37161]
2156 * [Optimize `Substs::super_fold_with`][37108]
2157 * [Optimize `ObligationForest`'s `NodeState` handling][36993]
2158 * [Speed up `plug_leaks`][36917]
2163 * [`println!()`, with no arguments, prints newline][36825].
2164 Previously, an empty string was required to achieve the same.
2165 * [`Wrapping` impls standard binary and unary operators, as well as
2166 the `Sum` and `Product` iterators][37356]
2167 * [Implement `From<Cow<str>> for String` and `From<Cow<[T]>> for
2169 * [Improve `fold` performance for `chain`, `cloned`, `map`, and
2170 `VecDeque` iterators][37315]
2171 * [Improve `SipHasher` performance on small values][37312]
2172 * [Add Iterator trait TrustedLen to enable better FromIterator /
2174 * [Expand `.zip()` specialization to `.map()` and `.cloned()`][37230]
2175 * [`ReadDir` implements `Debug`][37221]
2176 * [Implement `RefUnwindSafe` for atomic types][37178]
2177 * [Specialize `Vec::extend` to `Vec::extend_from_slice`][37094]
2178 * [Avoid allocations in `Decoder::read_str`][37064]
2179 * [`io::Error` implements `From<io::ErrorKind>`][37037]
2180 * [Impl `Debug` for raw pointers to unsized data][36880]
2181 * [Don't reuse `HashMap` random seeds][37470]
2182 * [The internal memory layout of `HashMap` is more cache-friendly, for
2183 significant improvements in some operations][36692]
2184 * [`HashMap` uses less memory on 32-bit architectures][36595]
2185 * [Impl `Add<{str, Cow<str>}>` for `Cow<str>`][36430]
2190 * [Expose rustc cfg values to build scripts][cargo/3243]
2191 * [Allow cargo to work with read-only `CARGO_HOME`][cargo/3259]
2192 * [Fix passing --features when testing multiple packages][cargo/3280]
2193 * [Use a single profile set per workspace][cargo/3249]
2194 * [Load `replace` sections from lock files][cargo/3220]
2195 * [Ignore `panic` configuration for test/bench profiles][cargo/3175]
2200 * [rustup is the recommended Rust installation method][1.14rustup]
2201 * This release includes host (rustc) builds for Linux on MIPS, PowerPC, and
2202 S390x. These are [tier 2] platforms and may have major defects. Follow the
2203 instructions on the website to install, or add the targets to an existing
2204 installation with `rustup target add`. The new target triples are:
2205 - `mips-unknown-linux-gnu`
2206 - `mipsel-unknown-linux-gnu`
2207 - `mips64-unknown-linux-gnuabi64`
2208 - `mips64el-unknown-linux-gnuabi64 `
2209 - `powerpc-unknown-linux-gnu`
2210 - `powerpc64-unknown-linux-gnu`
2211 - `powerpc64le-unknown-linux-gnu`
2212 - `s390x-unknown-linux-gnu `
2213 * This release includes target (std) builds for ARM Linux running MUSL
2214 libc. These are [tier 2] platforms and may have major defects. Add the
2215 following triples to an existing rustup installation with `rustup target add`:
2216 - `arm-unknown-linux-musleabi`
2217 - `arm-unknown-linux-musleabihf`
2218 - `armv7-unknown-linux-musleabihf`
2219 * This release includes [experimental support for WebAssembly][1.14wasm], via
2220 the `wasm32-unknown-emscripten` target. This target is known to have major
2221 defects. Please test, report, and fix.
2222 * rustup no longer installs documentation by default. Run `rustup
2223 component add rust-docs` to install.
2224 * [Fix line stepping in debugger][37310]
2225 * [Enable line number debuginfo in releases][37280]
2230 * [Disable jemalloc on aarch64/powerpc/mips][37392]
2231 * [Add support for Fuchsia OS][37313]
2232 * [Detect local-rebuild by only MAJOR.MINOR version][37273]
2237 * [A number of forward-compatibility lints used by the compiler
2238 to gradually introduce language changes have been converted
2239 to deny by default][36894]:
2240 - ["use of inaccessible extern crate erroneously allowed"][36886]
2241 - ["type parameter default erroneously allowed in invalid location"][36887]
2242 - ["detects super or self keywords at the beginning of global path"][36888]
2243 - ["two overlapping inherent impls define an item with the same name
2244 were erroneously allowed"][36889]
2245 - ["floating-point constants cannot be used in patterns"][36890]
2246 - ["constants of struct or enum type can only be used in a pattern if
2247 the struct or enum has `#[derive(PartialEq, Eq)]`"][36891]
2248 - ["lifetimes or labels named `'_` were erroneously allowed"][36892]
2249 * [Prohibit patterns in trait methods without bodies][37378]
2250 * [The atomic `Ordering` enum may not be matched exhaustively][37351]
2251 * [Future-proofing `#[no_link]` breaks some obscure cases][37247]
2252 * [The `$crate` macro variable is accepted in fewer locations][37213]
2253 * [Impls specifying extra region requirements beyond the trait
2254 they implement are rejected][37167]
2255 * [Enums may not be unsized][37111]. Unsized enums are intended to
2256 work but never have. For now they are forbidden.
2257 * [Enforce the shadowing restrictions from RFC 1560 for today's macros][36767]
2259 [tier 2]: https://forge.rust-lang.org/platform-support.html
2260 [1.14rustup]: https://internals.rust-lang.org/t/beta-testing-rustup-rs/3316/204
2261 [1.14wasm]: https://users.rust-lang.org/t/compiling-to-the-web-with-rust-and-emscripten/7627
2262 [36430]: https://github.com/rust-lang/rust/pull/36430
2263 [36595]: https://github.com/rust-lang/rust/pull/36595
2264 [36595]: https://github.com/rust-lang/rust/pull/36595
2265 [36692]: https://github.com/rust-lang/rust/pull/36692
2266 [36767]: https://github.com/rust-lang/rust/pull/36767
2267 [36794]: https://github.com/rust-lang/rust/pull/36794
2268 [36798]: https://github.com/rust-lang/rust/pull/36798
2269 [36819]: https://github.com/rust-lang/rust/pull/36819
2270 [36822]: https://github.com/rust-lang/rust/pull/36822
2271 [36825]: https://github.com/rust-lang/rust/pull/36825
2272 [36843]: https://github.com/rust-lang/rust/pull/36843
2273 [36880]: https://github.com/rust-lang/rust/pull/36880
2274 [36886]: https://github.com/rust-lang/rust/issues/36886
2275 [36887]: https://github.com/rust-lang/rust/issues/36887
2276 [36888]: https://github.com/rust-lang/rust/issues/36888
2277 [36889]: https://github.com/rust-lang/rust/issues/36889
2278 [36890]: https://github.com/rust-lang/rust/issues/36890
2279 [36891]: https://github.com/rust-lang/rust/issues/36891
2280 [36892]: https://github.com/rust-lang/rust/issues/36892
2281 [36894]: https://github.com/rust-lang/rust/pull/36894
2282 [36917]: https://github.com/rust-lang/rust/pull/36917
2283 [36993]: https://github.com/rust-lang/rust/pull/36993
2284 [37037]: https://github.com/rust-lang/rust/pull/37037
2285 [37064]: https://github.com/rust-lang/rust/pull/37064
2286 [37094]: https://github.com/rust-lang/rust/pull/37094
2287 [37108]: https://github.com/rust-lang/rust/pull/37108
2288 [37111]: https://github.com/rust-lang/rust/pull/37111
2289 [37161]: https://github.com/rust-lang/rust/pull/37161
2290 [37162]: https://github.com/rust-lang/rust/pull/37162
2291 [37167]: https://github.com/rust-lang/rust/pull/37167
2292 [37178]: https://github.com/rust-lang/rust/pull/37178
2293 [37200]: https://github.com/rust-lang/rust/pull/37200
2294 [37213]: https://github.com/rust-lang/rust/pull/37213
2295 [37221]: https://github.com/rust-lang/rust/pull/37221
2296 [37224]: https://github.com/rust-lang/rust/pull/37224
2297 [37230]: https://github.com/rust-lang/rust/pull/37230
2298 [37231]: https://github.com/rust-lang/rust/pull/37231
2299 [37247]: https://github.com/rust-lang/rust/pull/37247
2300 [37267]: https://github.com/rust-lang/rust/pull/37267
2301 [37270]: https://github.com/rust-lang/rust/pull/37270
2302 [37273]: https://github.com/rust-lang/rust/pull/37273
2303 [37280]: https://github.com/rust-lang/rust/pull/37280
2304 [37298]: https://github.com/rust-lang/rust/pull/37298
2305 [37306]: https://github.com/rust-lang/rust/pull/37306
2306 [37310]: https://github.com/rust-lang/rust/pull/37310
2307 [37312]: https://github.com/rust-lang/rust/pull/37312
2308 [37313]: https://github.com/rust-lang/rust/pull/37313
2309 [37315]: https://github.com/rust-lang/rust/pull/37315
2310 [37318]: https://github.com/rust-lang/rust/pull/37318
2311 [37322]: https://github.com/rust-lang/rust/pull/37322
2312 [37326]: https://github.com/rust-lang/rust/pull/37326
2313 [37351]: https://github.com/rust-lang/rust/pull/37351
2314 [37356]: https://github.com/rust-lang/rust/pull/37356
2315 [37367]: https://github.com/rust-lang/rust/pull/37367
2316 [37373]: https://github.com/rust-lang/rust/pull/37373
2317 [37378]: https://github.com/rust-lang/rust/pull/37378
2318 [37389]: https://github.com/rust-lang/rust/pull/37389
2319 [37392]: https://github.com/rust-lang/rust/pull/37392
2320 [37427]: https://github.com/rust-lang/rust/pull/37427
2321 [37439]: https://github.com/rust-lang/rust/pull/37439
2322 [37445]: https://github.com/rust-lang/rust/pull/37445
2323 [37470]: https://github.com/rust-lang/rust/pull/37470
2324 [37569]: https://github.com/rust-lang/rust/pull/37569
2325 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
2326 [cargo/3175]: https://github.com/rust-lang/cargo/pull/3175
2327 [cargo/3220]: https://github.com/rust-lang/cargo/pull/3220
2328 [cargo/3243]: https://github.com/rust-lang/cargo/pull/3243
2329 [cargo/3249]: https://github.com/rust-lang/cargo/pull/3249
2330 [cargo/3259]: https://github.com/rust-lang/cargo/pull/3259
2331 [cargo/3280]: https://github.com/rust-lang/cargo/pull/3280
2334 Version 1.13.0 (2016-11-10)
2335 ===========================
2340 * [Stabilize the `?` operator][36995]. `?` is a simple way to propagate
2341 errors, like the `try!` macro, described in [RFC 0243].
2342 * [Stabilize macros in type position][36014]. Described in [RFC 873].
2343 * [Stabilize attributes on statements][36995]. Described in [RFC 0016].
2344 * [Fix `#[derive]` for empty tuple structs/variants][35728]
2345 * [Fix lifetime rules for 'if' conditions][36029]
2346 * [Avoid loading and parsing unconfigured non-inline modules][36482]
2351 * [Add the `-C link-arg` argument][36574]
2352 * [Remove the old AST-based backend from rustc_trans][35764]
2353 * [Don't enable NEON by default on armv7 Linux][35814]
2354 * [Fix debug line number info for macro expansions][35238]
2355 * [Do not emit "class method" debuginfo for types that are not
2356 DICompositeType][36008]
2357 * [Warn about multiple conflicting #[repr] hints][34623]
2358 * [When sizing DST, don't double-count nested struct prefixes][36351]
2359 * [Default RUST_MIN_STACK to 16MiB for now][36505]
2360 * [Improve rlib metadata format][36551]. Reduces rlib size significantly.
2361 * [Reject macros with empty repetitions to avoid infinite loop][36721]
2362 * [Expand macros without recursing to avoid stack overflows][36214]
2367 * [Replace macro backtraces with labeled local uses][35702]
2368 * [Improve error message for misplaced doc comments][33922]
2369 * [Buffer unix and lock windows to prevent message interleaving][35975]
2370 * [Update lifetime errors to specifically note temporaries][36171]
2371 * [Special case a few colors for Windows][36178]
2372 * [Suggest `use self` when such an import resolves][36289]
2373 * [Be more specific when type parameter shadows primitive type][36338]
2374 * Many minor improvements
2376 Compile-time Optimizations
2377 --------------------------
2379 * [Compute and cache HIR hashes at beginning][35854]
2380 * [Don't hash types in loan paths][36004]
2381 * [Cache projections in trans][35761]
2382 * [Optimize the parser's last token handling][36527]
2383 * [Only instantiate #[inline] functions in codegen units referencing
2384 them][36524]. This leads to big improvements in cases where crates export
2385 define many inline functions without using them directly.
2386 * [Lazily allocate TypedArena's first chunk][36592]
2387 * [Don't allocate during default HashSet creation][36734]
2394 * [`overflowing_abs`]
2395 * [`RefCell::try_borrow`]
2396 * [`RefCell::try_borrow_mut`]
2401 * [Add `assert_ne!` and `debug_assert_ne!`][35074]
2402 * [Make `vec_deque::Drain`, `hash_map::Drain`, and `hash_set::Drain`
2404 * [Implement `AsRef<[T]>` for `std::slice::Iter`][35559]
2405 * [Implement `Debug` for `std::vec::IntoIter`][35707]
2406 * [`CString`: avoid excessive growth just to 0-terminate][35871]
2407 * [Implement `CoerceUnsized` for `{Cell, RefCell, UnsafeCell}`][35627]
2408 * [Use arc4rand on FreeBSD][35884]
2409 * [memrchr: Correct aligned offset computation][35969]
2410 * [Improve Demangling of Rust Symbols][36059]
2411 * [Use monotonic time in condition variables][35048]
2412 * [Implement `Debug` for `std::path::{Components,Iter}`][36101]
2413 * [Implement conversion traits for `char`][35755]
2414 * [Fix illegal instruction caused by overflow in channel cloning][36104]
2415 * [Zero first byte of CString on drop][36264]
2416 * [Inherit overflow checks for sum and product][36372]
2417 * [Add missing Eq implementations][36423]
2418 * [Implement `Debug` for `DirEntry`][36631]
2419 * [When `getaddrinfo` returns `EAI_SYSTEM` retrieve actual error from
2421 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
2422 * [Implement more traits for `std::io::ErrorKind`][35911]
2423 * [Optimize BinaryHeap bounds checking][36072]
2424 * [Work around pointer aliasing issue in `Vec::extend_from_slice`,
2425 `extend_with_element`][36355]
2426 * [Fix overflow checking in unsigned pow()][34942]
2431 * This release includes security fixes to both curl and OpenSSL.
2432 * [Fix transitive doctests when panic=abort][cargo/3021]
2433 * [Add --all-features flag to cargo][cargo/3038]
2434 * [Reject path-based dependencies in `cargo package`][cargo/3060]
2435 * [Don't parse the home directory more than once][cargo/3078]
2436 * [Don't try to generate Cargo.lock on empty workspaces][cargo/3092]
2437 * [Update OpenSSL to 1.0.2j][cargo/3121]
2438 * [Add license and license_file to cargo metadata output][cargo/3110]
2439 * [Make crates-io registry URL optional in config; ignore all changes to
2440 source.crates-io][cargo/3089]
2441 * [Don't download dependencies from other platforms][cargo/3123]
2442 * [Build transitive dev-dependencies when needed][cargo/3125]
2443 * [Add support for per-target rustflags in .cargo/config][cargo/3157]
2444 * [Avoid updating registry when adding existing deps][cargo/3144]
2445 * [Warn about path overrides that won't work][cargo/3136]
2446 * [Use workspaces during `cargo install`][cargo/3146]
2447 * [Leak mspdbsrv.exe processes on Windows][cargo/3162]
2448 * [Add --message-format flag][cargo/3000]
2449 * [Pass target environment for rustdoc][cargo/3205]
2450 * [Use `CommandExt::exec` for `cargo run` on Unix][cargo/2818]
2451 * [Update curl and curl-sys][cargo/3241]
2452 * [Call rustdoc test with the correct cfg flags of a package][cargo/3242]
2457 * [rustdoc: Add the `--sysroot` argument][36586]
2458 * [rustdoc: Fix a couple of issues with the search results][35655]
2459 * [rustdoc: remove the `!` from macro URLs and titles][35234]
2460 * [gdb: Fix pretty-printing special-cased Rust types][35585]
2461 * [rustdoc: Filter more incorrect methods inherited through Deref][36266]
2466 * [Remove unmaintained style guide][35124]
2467 * [Add s390x support][36369]
2468 * [Initial work at Haiku OS support][36727]
2469 * [Add mips-uclibc targets][35734]
2470 * [Crate-ify compiler-rt into compiler-builtins][35021]
2471 * [Add rustc version info (git hash + date) to dist tarball][36213]
2472 * Many documentation improvements
2477 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
2478 * [Deny (by default) transmuting from fn item types to pointer-sized
2479 types][34923]. Continuing the long transition to zero-sized fn items,
2481 * [Fix `#[derive]` for empty tuple structs/variants][35728].
2483 * [Issue deprecation warnings for safe accesses to extern statics][36173]
2484 * [Fix lifetime rules for 'if' conditions][36029].
2485 * [Inherit overflow checks for sum and product][36372].
2486 * [Forbid user-defined macros named "macro_rules"][36730].
2488 [33922]: https://github.com/rust-lang/rust/pull/33922
2489 [34623]: https://github.com/rust-lang/rust/pull/34623
2490 [34923]: https://github.com/rust-lang/rust/pull/34923
2491 [34942]: https://github.com/rust-lang/rust/pull/34942
2492 [34982]: https://github.com/rust-lang/rust/pull/34982
2493 [35021]: https://github.com/rust-lang/rust/pull/35021
2494 [35048]: https://github.com/rust-lang/rust/pull/35048
2495 [35074]: https://github.com/rust-lang/rust/pull/35074
2496 [35124]: https://github.com/rust-lang/rust/pull/35124
2497 [35234]: https://github.com/rust-lang/rust/pull/35234
2498 [35238]: https://github.com/rust-lang/rust/pull/35238
2499 [35354]: https://github.com/rust-lang/rust/pull/35354
2500 [35559]: https://github.com/rust-lang/rust/pull/35559
2501 [35585]: https://github.com/rust-lang/rust/pull/35585
2502 [35627]: https://github.com/rust-lang/rust/pull/35627
2503 [35655]: https://github.com/rust-lang/rust/pull/35655
2504 [35702]: https://github.com/rust-lang/rust/pull/35702
2505 [35707]: https://github.com/rust-lang/rust/pull/35707
2506 [35728]: https://github.com/rust-lang/rust/pull/35728
2507 [35734]: https://github.com/rust-lang/rust/pull/35734
2508 [35755]: https://github.com/rust-lang/rust/pull/35755
2509 [35761]: https://github.com/rust-lang/rust/pull/35761
2510 [35764]: https://github.com/rust-lang/rust/pull/35764
2511 [35814]: https://github.com/rust-lang/rust/pull/35814
2512 [35854]: https://github.com/rust-lang/rust/pull/35854
2513 [35871]: https://github.com/rust-lang/rust/pull/35871
2514 [35884]: https://github.com/rust-lang/rust/pull/35884
2515 [35911]: https://github.com/rust-lang/rust/pull/35911
2516 [35969]: https://github.com/rust-lang/rust/pull/35969
2517 [35975]: https://github.com/rust-lang/rust/pull/35975
2518 [36004]: https://github.com/rust-lang/rust/pull/36004
2519 [36008]: https://github.com/rust-lang/rust/pull/36008
2520 [36014]: https://github.com/rust-lang/rust/pull/36014
2521 [36029]: https://github.com/rust-lang/rust/pull/36029
2522 [36059]: https://github.com/rust-lang/rust/pull/36059
2523 [36072]: https://github.com/rust-lang/rust/pull/36072
2524 [36101]: https://github.com/rust-lang/rust/pull/36101
2525 [36104]: https://github.com/rust-lang/rust/pull/36104
2526 [36171]: https://github.com/rust-lang/rust/pull/36171
2527 [36173]: https://github.com/rust-lang/rust/pull/36173
2528 [36178]: https://github.com/rust-lang/rust/pull/36178
2529 [36213]: https://github.com/rust-lang/rust/pull/36213
2530 [36214]: https://github.com/rust-lang/rust/pull/36214
2531 [36264]: https://github.com/rust-lang/rust/pull/36264
2532 [36266]: https://github.com/rust-lang/rust/pull/36266
2533 [36289]: https://github.com/rust-lang/rust/pull/36289
2534 [36338]: https://github.com/rust-lang/rust/pull/36338
2535 [36351]: https://github.com/rust-lang/rust/pull/36351
2536 [36355]: https://github.com/rust-lang/rust/pull/36355
2537 [36369]: https://github.com/rust-lang/rust/pull/36369
2538 [36372]: https://github.com/rust-lang/rust/pull/36372
2539 [36423]: https://github.com/rust-lang/rust/pull/36423
2540 [36482]: https://github.com/rust-lang/rust/pull/36482
2541 [36505]: https://github.com/rust-lang/rust/pull/36505
2542 [36524]: https://github.com/rust-lang/rust/pull/36524
2543 [36527]: https://github.com/rust-lang/rust/pull/36527
2544 [36551]: https://github.com/rust-lang/rust/pull/36551
2545 [36574]: https://github.com/rust-lang/rust/pull/36574
2546 [36586]: https://github.com/rust-lang/rust/pull/36586
2547 [36592]: https://github.com/rust-lang/rust/pull/36592
2548 [36631]: https://github.com/rust-lang/rust/pull/36631
2549 [36639]: https://github.com/rust-lang/rust/pull/36639
2550 [36721]: https://github.com/rust-lang/rust/pull/36721
2551 [36727]: https://github.com/rust-lang/rust/pull/36727
2552 [36730]: https://github.com/rust-lang/rust/pull/36730
2553 [36734]: https://github.com/rust-lang/rust/pull/36734
2554 [36754]: https://github.com/rust-lang/rust/pull/36754
2555 [36995]: https://github.com/rust-lang/rust/pull/36995
2556 [RFC 0016]: https://github.com/rust-lang/rfcs/blob/master/text/0016-more-attributes.md
2557 [RFC 0243]: https://github.com/rust-lang/rfcs/blob/master/text/0243-trait-based-exception-handling.md
2558 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
2559 [RFC 401]: https://github.com/rust-lang/rfcs/blob/master/text/0401-coercions.md
2560 [RFC 873]: https://github.com/rust-lang/rfcs/blob/master/text/0873-type-macros.md
2561 [cargo/2818]: https://github.com/rust-lang/cargo/pull/2818
2562 [cargo/3000]: https://github.com/rust-lang/cargo/pull/3000
2563 [cargo/3021]: https://github.com/rust-lang/cargo/pull/3021
2564 [cargo/3038]: https://github.com/rust-lang/cargo/pull/3038
2565 [cargo/3060]: https://github.com/rust-lang/cargo/pull/3060
2566 [cargo/3078]: https://github.com/rust-lang/cargo/pull/3078
2567 [cargo/3089]: https://github.com/rust-lang/cargo/pull/3089
2568 [cargo/3092]: https://github.com/rust-lang/cargo/pull/3092
2569 [cargo/3110]: https://github.com/rust-lang/cargo/pull/3110
2570 [cargo/3121]: https://github.com/rust-lang/cargo/pull/3121
2571 [cargo/3123]: https://github.com/rust-lang/cargo/pull/3123
2572 [cargo/3125]: https://github.com/rust-lang/cargo/pull/3125
2573 [cargo/3136]: https://github.com/rust-lang/cargo/pull/3136
2574 [cargo/3144]: https://github.com/rust-lang/cargo/pull/3144
2575 [cargo/3146]: https://github.com/rust-lang/cargo/pull/3146
2576 [cargo/3157]: https://github.com/rust-lang/cargo/pull/3157
2577 [cargo/3162]: https://github.com/rust-lang/cargo/pull/3162
2578 [cargo/3205]: https://github.com/rust-lang/cargo/pull/3205
2579 [cargo/3241]: https://github.com/rust-lang/cargo/pull/3241
2580 [cargo/3242]: https://github.com/rust-lang/cargo/pull/3242
2581 [rustup]: https://www.rustup.rs
2582 [`checked_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.checked_abs
2583 [`wrapping_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.wrapping_abs
2584 [`overflowing_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.overflowing_abs
2585 [`RefCell::try_borrow`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow
2586 [`RefCell::try_borrow_mut`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow_mut
2587 [`SipHasher`]: https://doc.rust-lang.org/std/hash/struct.SipHasher.html
2588 [`DefaultHasher`]: https://doc.rust-lang.org/std/collections/hash_map/struct.DefaultHasher.html
2591 Version 1.12.1 (2016-10-20)
2592 ===========================
2597 * [ICE: 'rustc' panicked at 'assertion failed: concrete_substs.is_normalized_for_trans()' #36381][36381]
2598 * [Confusion with double negation and booleans][36856]
2599 * [rustc 1.12.0 fails with SIGSEGV in release mode (syn crate 0.8.0)][36875]
2600 * [Rustc 1.12.0 Windows build of `ethcore` crate fails with LLVM error][36924]
2601 * [1.12.0: High memory usage when linking in release mode with debug info][36926]
2602 * [Corrupted memory after updated to 1.12][36936]
2603 * ["Let NullaryConstructor = something;" causes internal compiler error: "tried to overwrite interned AdtDef"][37026]
2604 * [Fix ICE: inject bitcast if types mismatch for invokes/calls/stores][37112]
2605 * [debuginfo: Handle spread_arg case in MIR-trans in a more stable way.][37153]
2607 [36381]: https://github.com/rust-lang/rust/issues/36381
2608 [36856]: https://github.com/rust-lang/rust/issues/36856
2609 [36875]: https://github.com/rust-lang/rust/issues/36875
2610 [36924]: https://github.com/rust-lang/rust/issues/36924
2611 [36926]: https://github.com/rust-lang/rust/issues/36926
2612 [36936]: https://github.com/rust-lang/rust/issues/36936
2613 [37026]: https://github.com/rust-lang/rust/issues/37026
2614 [37112]: https://github.com/rust-lang/rust/issues/37112
2615 [37153]: https://github.com/rust-lang/rust/issues/37153
2618 Version 1.12.0 (2016-09-29)
2619 ===========================
2624 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)](https://github.com/rust-lang/rust/pull/34096).
2625 This translation pass is far simpler than the previous AST->LLVM pass, and
2626 creates opportunities to perform new optimizations directly on the MIR. It
2627 was previously described [on the Rust blog](https://blog.rust-lang.org/2016/04/19/MIR.html).
2628 * [`rustc` presents a new, more readable error format, along with
2629 machine-readable JSON error output for use by IDEs](https://github.com/rust-lang/rust/pull/35401).
2630 Most common editors supporting Rust have been updated to work with it. It was
2631 previously described [on the Rust blog](https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
2636 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)](https://github.com/rust-lang/rust/pull/34096).
2637 This translation pass is far simpler than the previous AST->LLVM pass, and
2638 creates opportunities to perform new optimizations directly on the MIR. It
2639 was previously described [on the Rust blog](https://blog.rust-lang.org/2016/04/19/MIR.html).
2640 * [Print the Rust target name, not the LLVM target name, with
2641 `--print target-list`](https://github.com/rust-lang/rust/pull/35489)
2642 * [The computation of `TypeId` is correct in some cases where it was previously
2643 producing inconsistent results](https://github.com/rust-lang/rust/pull/35267)
2644 * [The `mips-unknown-linux-gnu` target uses hardware floating point by default](https://github.com/rust-lang/rust/pull/34910)
2645 * [The `rustc` arguments, `--print target-cpus`, `--print target-features`,
2646 `--print relocation-models`, and `--print code-models` print the available
2647 options to the `-C target-cpu`, `-C target-feature`, `-C relocation-model` and
2648 `-C code-model` code generation arguments](https://github.com/rust-lang/rust/pull/34845)
2649 * [`rustc` supports three new MUSL targets on ARM: `arm-unknown-linux-musleabi`,
2650 `arm-unknown-linux-musleabihf`, and `armv7-unknown-linux-musleabihf`](https://github.com/rust-lang/rust/pull/35060).
2651 These targets produce statically-linked binaries. There are no binary release
2657 * [`rustc` presents a new, more readable error format, along with
2658 machine-readable JSON error output for use by IDEs](https://github.com/rust-lang/rust/pull/35401).
2659 Most common editors supporting Rust have been updated to work with it. It was
2660 previously described [on the Rust blog](https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
2661 * [In error descriptions, references are now described in plain English,
2662 instead of as "&-ptr"](https://github.com/rust-lang/rust/pull/35611)
2663 * [In error type descriptions, unknown numeric types are named `{integer}` or
2664 `{float}` instead of `_`](https://github.com/rust-lang/rust/pull/35080)
2665 * [`rustc` emits a clearer error when inner attributes follow a doc comment](https://github.com/rust-lang/rust/pull/34676)
2670 * [`macro_rules!` invocations can be made within `macro_rules!` invocations](https://github.com/rust-lang/rust/pull/34925)
2671 * [`macro_rules!` meta-variables are hygienic](https://github.com/rust-lang/rust/pull/35453)
2672 * [`macro_rules!` `tt` matchers can be reparsed correctly, making them much more
2673 useful](https://github.com/rust-lang/rust/pull/34908)
2674 * [`macro_rules!` `stmt` matchers correctly consume the entire contents when
2675 inside non-braces invocations](https://github.com/rust-lang/rust/pull/34886)
2676 * [Semicolons are properly required as statement delimiters inside
2677 `macro_rules!` invocations](https://github.com/rust-lang/rust/pull/34660)
2678 * [`cfg_attr` works on `path` attributes](https://github.com/rust-lang/rust/pull/34546)
2683 * [`Cell::as_ptr`](https://doc.rust-lang.org/std/cell/struct.Cell.html#method.as_ptr)
2684 * [`RefCell::as_ptr`](https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.as_ptr)
2685 * [`IpAddr::is_unspecified`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_unspecified)
2686 * [`IpAddr::is_loopback`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_loopback)
2687 * [`IpAddr::is_multicast`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_multicast)
2688 * [`Ipv4Addr::is_unspecified`](https://doc.rust-lang.org/std/net/struct.Ipv4Addr.html#method.is_unspecified)
2689 * [`Ipv6Addr::octets`](https://doc.rust-lang.org/std/net/struct.Ipv6Addr.html#method.octets)
2690 * [`LinkedList::contains`](https://doc.rust-lang.org/std/collections/linked_list/struct.LinkedList.html#method.contains)
2691 * [`VecDeque::contains`](https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.contains)
2692 * [`ExitStatusExt::from_raw`](https://doc.rust-lang.org/std/os/unix/process/trait.ExitStatusExt.html#tymethod.from_raw).
2693 Both on Unix and Windows.
2694 * [`Receiver::recv_timeout`](https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.recv_timeout)
2695 * [`RecvTimeoutError`](https://doc.rust-lang.org/std/sync/mpsc/enum.RecvTimeoutError.html)
2696 * [`BinaryHeap::peek_mut`](https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.peek_mut)
2697 * [`PeekMut`](https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html)
2698 * [`iter::Product`](https://doc.rust-lang.org/std/iter/trait.Product.html)
2699 * [`iter::Sum`](https://doc.rust-lang.org/std/iter/trait.Sum.html)
2700 * [`OccupiedEntry::remove_entry`](https://doc.rust-lang.org/std/collections/btree_map/struct.OccupiedEntry.html#method.remove_entry)
2701 * [`VacantEntry::into_key`](https://doc.rust-lang.org/std/collections/btree_map/struct.VacantEntry.html#method.into_key)
2706 * [The `format!` macro and friends now allow a single argument to be formatted
2707 in multiple styles](https://github.com/rust-lang/rust/pull/33642)
2708 * [The lifetime bounds on `[T]::binary_search_by` and
2709 `[T]::binary_search_by_key` have been adjusted to be more flexible](https://github.com/rust-lang/rust/pull/34762)
2710 * [`Option` implements `From` for its contained type](https://github.com/rust-lang/rust/pull/34828)
2711 * [`Cell`, `RefCell` and `UnsafeCell` implement `From` for their contained type](https://github.com/rust-lang/rust/pull/35392)
2712 * [`RwLock` panics if the reader count overflows](https://github.com/rust-lang/rust/pull/35378)
2713 * [`vec_deque::Drain`, `hash_map::Drain` and `hash_set::Drain` are covariant](https://github.com/rust-lang/rust/pull/35354)
2714 * [`vec::Drain` and `binary_heap::Drain` are covariant](https://github.com/rust-lang/rust/pull/34951)
2715 * [`Cow<str>` implements `FromIterator` for `char`, `&str` and `String`](https://github.com/rust-lang/rust/pull/35064)
2716 * [Sockets on Linux are correctly closed in subprocesses via `SOCK_CLOEXEC`](https://github.com/rust-lang/rust/pull/34946)
2717 * [`hash_map::Entry`, `hash_map::VacantEntry` and `hash_map::OccupiedEntry`
2718 implement `Debug`](https://github.com/rust-lang/rust/pull/34937)
2719 * [`btree_map::Entry`, `btree_map::VacantEntry` and `btree_map::OccupiedEntry`
2720 implement `Debug`](https://github.com/rust-lang/rust/pull/34885)
2721 * [`String` implements `AddAssign`](https://github.com/rust-lang/rust/pull/34890)
2722 * [Variadic `extern fn` pointers implement the `Clone`, `PartialEq`, `Eq`,
2723 `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and `fmt::Debug` traits](https://github.com/rust-lang/rust/pull/34879)
2724 * [`FileType` implements `Debug`](https://github.com/rust-lang/rust/pull/34757)
2725 * [References to `Mutex` and `RwLock` are unwind-safe](https://github.com/rust-lang/rust/pull/34756)
2726 * [`mpsc::sync_channel` `Receiver`s return any available message before
2727 reporting a disconnect](https://github.com/rust-lang/rust/pull/34731)
2728 * [Unicode definitions have been updated to 9.0](https://github.com/rust-lang/rust/pull/34599)
2729 * [`env` iterators implement `DoubleEndedIterator`](https://github.com/rust-lang/rust/pull/33312)
2734 * [Support local mirrors of registries](https://github.com/rust-lang/cargo/pull/2857)
2735 * [Add support for command aliases](https://github.com/rust-lang/cargo/pull/2679)
2736 * [Allow `opt-level="s"` / `opt-level="z"` in profile overrides](https://github.com/rust-lang/cargo/pull/3007)
2737 * [Make `cargo doc --open --target` work as expected](https://github.com/rust-lang/cargo/pull/2988)
2738 * [Speed up noop registry updates](https://github.com/rust-lang/cargo/pull/2974)
2739 * [Update OpenSSL](https://github.com/rust-lang/cargo/pull/2971)
2740 * [Fix `--panic=abort` with plugins](https://github.com/rust-lang/cargo/pull/2954)
2741 * [Always pass `-C metadata` to the compiler](https://github.com/rust-lang/cargo/pull/2946)
2742 * [Fix depending on git repos with workspaces](https://github.com/rust-lang/cargo/pull/2938)
2743 * [Add a `--lib` flag to `cargo new`](https://github.com/rust-lang/cargo/pull/2921)
2744 * [Add `http.cainfo` for custom certs](https://github.com/rust-lang/cargo/pull/2917)
2745 * [Indicate the compilation profile after compiling](https://github.com/rust-lang/cargo/pull/2909)
2746 * [Allow enabling features for dependencies with `--features`](https://github.com/rust-lang/cargo/pull/2876)
2747 * [Add `--jobs` flag to `cargo package`](https://github.com/rust-lang/cargo/pull/2867)
2748 * [Add `--dry-run` to `cargo publish`](https://github.com/rust-lang/cargo/pull/2849)
2749 * [Add support for `RUSTDOCFLAGS`](https://github.com/rust-lang/cargo/pull/2794)
2754 * [`panic::catch_unwind` is more optimized](https://github.com/rust-lang/rust/pull/35444)
2755 * [`panic::catch_unwind` no longer accesses thread-local storage on entry](https://github.com/rust-lang/rust/pull/34866)
2760 * [Test binaries now support a `--test-threads` argument to specify the number
2761 of threads used to run tests, and which acts the same as the
2762 `RUST_TEST_THREADS` environment variable](https://github.com/rust-lang/rust/pull/35414)
2763 * [The test runner now emits a warning when tests run over 60 seconds](https://github.com/rust-lang/rust/pull/35405)
2764 * [rustdoc: Fix methods in search results](https://github.com/rust-lang/rust/pull/34752)
2765 * [`rust-lldb` warns about unsupported versions of LLDB](https://github.com/rust-lang/rust/pull/34646)
2766 * [Rust releases now come with source packages that can be installed by rustup
2767 via `rustup component add rust-src`](https://github.com/rust-lang/rust/pull/34366).
2768 The resulting source code can be used by tools and IDES, located in the
2769 sysroot under `lib/rustlib/src`.
2774 * [The compiler can now be built against LLVM 3.9](https://github.com/rust-lang/rust/pull/35594)
2775 * Many minor improvements to the documentation.
2776 * [The Rust exception handling "personality" routine is now written in Rust](https://github.com/rust-lang/rust/pull/34832)
2781 * [When printing Windows `OsStr`s, unpaired surrogate codepoints are escaped
2782 with the lowercase format instead of the uppercase](https://github.com/rust-lang/rust/pull/35084)
2783 * [When formatting strings, if "precision" is specified, the "fill",
2784 "align" and "width" specifiers are no longer ignored](https://github.com/rust-lang/rust/pull/34544)
2785 * [The `Debug` impl for strings no longer escapes all non-ASCII characters](https://github.com/rust-lang/rust/pull/34485)
2788 Version 1.11.0 (2016-08-18)
2789 ===========================
2794 * [`cfg_attr` works on `path` attributes](https://github.com/rust-lang/rust/pull/34546)
2795 * [Support nested `cfg_attr` attributes](https://github.com/rust-lang/rust/pull/34216)
2796 * [Allow statement-generating braced macro invocations at the end of blocks](https://github.com/rust-lang/rust/pull/34436)
2797 * [Macros can be expanded inside of trait definitions](https://github.com/rust-lang/rust/pull/34213)
2798 * [`#[macro_use]` works properly when it is itself expanded from a macro](https://github.com/rust-lang/rust/pull/34032)
2803 * [`BinaryHeap::append`](https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.append)
2804 * [`BTreeMap::append`](https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.append)
2805 * [`BTreeMap::split_off`](https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.split_off)
2806 * [`BTreeSet::append`](https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.append)
2807 * [`BTreeSet::split_off`](https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.split_off)
2808 * [`f32::to_degrees`](https://doc.rust-lang.org/std/primitive.f32.html#method.to_degrees)
2809 (in libcore - previously stabilized in libstd)
2810 * [`f32::to_radians`](https://doc.rust-lang.org/std/primitive.f32.html#method.to_radians)
2811 (in libcore - previously stabilized in libstd)
2812 * [`f64::to_degrees`](https://doc.rust-lang.org/std/primitive.f64.html#method.to_degrees)
2813 (in libcore - previously stabilized in libstd)
2814 * [`f64::to_radians`](https://doc.rust-lang.org/std/primitive.f64.html#method.to_radians)
2815 (in libcore - previously stabilized in libstd)
2816 * [`Iterator::sum`](https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
2817 * [`Iterator::product`](https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
2818 * [`Cell::get_mut`](https://doc.rust-lang.org/std/cell/struct.Cell.html#method.get_mut)
2819 * [`RefCell::get_mut`](https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.get_mut)
2824 * [The `thread_local!` macro supports multiple definitions in a single
2825 invocation, and can apply attributes](https://github.com/rust-lang/rust/pull/34077)
2826 * [`Cow` implements `Default`](https://github.com/rust-lang/rust/pull/34305)
2827 * [`Wrapping` implements binary, octal, lower-hex and upper-hex
2828 `Display` formatting](https://github.com/rust-lang/rust/pull/34190)
2829 * [The range types implement `Hash`](https://github.com/rust-lang/rust/pull/34180)
2830 * [`lookup_host` ignores unknown address types](https://github.com/rust-lang/rust/pull/34067)
2831 * [`assert_eq!` accepts a custom error message, like `assert!` does](https://github.com/rust-lang/rust/pull/33976)
2832 * [The main thread is now called "main" instead of "<main>"](https://github.com/rust-lang/rust/pull/33803)
2837 * [Disallow specifying features of transitive deps](https://github.com/rust-lang/cargo/pull/2821)
2838 * [Add color support for Windows consoles](https://github.com/rust-lang/cargo/pull/2804)
2839 * [Fix `harness = false` on `[lib]` sections](https://github.com/rust-lang/cargo/pull/2795)
2840 * [Don't panic when `links` contains a '.'](https://github.com/rust-lang/cargo/pull/2787)
2841 * [Build scripts can emit warnings](https://github.com/rust-lang/cargo/pull/2630),
2842 and `-vv` prints warnings for all crates.
2843 * [Ignore file locks on OS X NFS mounts](https://github.com/rust-lang/cargo/pull/2720)
2844 * [Don't warn about `package.metadata` keys](https://github.com/rust-lang/cargo/pull/2668).
2845 This provides room for expansion by arbitrary tools.
2846 * [Add support for cdylib crate types](https://github.com/rust-lang/cargo/pull/2741)
2847 * [Prevent publishing crates when files are dirty](https://github.com/rust-lang/cargo/pull/2781)
2848 * [Don't fetch all crates on clean](https://github.com/rust-lang/cargo/pull/2704)
2849 * [Propagate --color option to rustc](https://github.com/rust-lang/cargo/pull/2779)
2850 * [Fix `cargo doc --open` on Windows](https://github.com/rust-lang/cargo/pull/2780)
2851 * [Improve autocompletion](https://github.com/rust-lang/cargo/pull/2772)
2852 * [Configure colors of stderr as well as stdout](https://github.com/rust-lang/cargo/pull/2739)
2857 * [Caching projections speeds up type check dramatically for some
2858 workloads](https://github.com/rust-lang/rust/pull/33816)
2859 * [The default `HashMap` hasher is SipHash 1-3 instead of SipHash 2-4](https://github.com/rust-lang/rust/pull/33940)
2860 This hasher is faster, but is believed to provide sufficient
2861 protection from collision attacks.
2862 * [Comparison of `Ipv4Addr` is 10x faster](https://github.com/rust-lang/rust/pull/33891)
2867 * [Fix empty implementation section on some module pages](https://github.com/rust-lang/rust/pull/34536)
2868 * [Fix inlined renamed re-exports in import lists](https://github.com/rust-lang/rust/pull/34479)
2869 * [Fix search result layout for enum variants and struct fields](https://github.com/rust-lang/rust/pull/34477)
2870 * [Fix issues with source links to external crates](https://github.com/rust-lang/rust/pull/34387)
2871 * [Fix redirect pages for renamed re-exports](https://github.com/rust-lang/rust/pull/34245)
2876 * [rustc is better at finding the MSVC toolchain](https://github.com/rust-lang/rust/pull/34492)
2877 * [When emitting debug info, rustc emits frame pointers for closures,
2878 shims and glue, as it does for all other functions](https://github.com/rust-lang/rust/pull/33909)
2879 * [rust-lldb warns about unsupported versions of LLDB](https://github.com/rust-lang/rust/pull/34646)
2880 * Many more errors have been given error codes and extended
2882 * API documentation continues to be improved, with many new examples
2887 * [rustc no longer hangs when dependencies recursively re-export
2888 submodules](https://github.com/rust-lang/rust/pull/34542)
2889 * [rustc requires LLVM 3.7+](https://github.com/rust-lang/rust/pull/34104)
2890 * [The 'How Safe and Unsafe Interact' chapter of The Rustonomicon was
2891 rewritten](https://github.com/rust-lang/rust/pull/33895)
2892 * [rustc support 16-bit pointer sizes](https://github.com/rust-lang/rust/pull/33460).
2893 No targets use this yet, but it works toward AVR support.
2898 * [`const`s and `static`s may not have unsized types](https://github.com/rust-lang/rust/pull/34443)
2899 * [The new follow-set rules that place restrictions on `macro_rules!`
2900 in order to ensure syntax forward-compatibility have been enabled](https://github.com/rust-lang/rust/pull/33982)
2901 This was an [amendment to RFC 550](https://github.com/rust-lang/rfcs/pull/1384),
2902 and has been a warning since 1.10.
2903 * [`cfg` attribute process has been refactored to fix various bugs](https://github.com/rust-lang/rust/pull/33706).
2904 This causes breakage in some corner cases.
2907 Version 1.10.0 (2016-07-07)
2908 ===========================
2913 * [Allow `concat_idents!` in type positions as well as in expression
2914 positions](https://github.com/rust-lang/rust/pull/33735).
2915 * [`Copy` types are required to have a trivial implementation of `Clone`](https://github.com/rust-lang/rust/pull/33420).
2916 [RFC 1521](https://github.com/rust-lang/rfcs/blob/master/text/1521-copy-clone-semantics.md).
2917 * [Single-variant enums support the `#[repr(..)]` attribute](https://github.com/rust-lang/rust/pull/33355).
2918 * [Fix `#[derive(RustcEncodable)]` in the presence of other `encode` methods](https://github.com/rust-lang/rust/pull/32908).
2919 * [`panic!` can be converted to a runtime abort with the
2920 `-C panic=abort` flag](https://github.com/rust-lang/rust/pull/32900).
2921 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
2922 * [Add a new crate type, 'cdylib'](https://github.com/rust-lang/rust/pull/33553).
2923 cdylibs are dynamic libraries suitable for loading by non-Rust hosts.
2924 [RFC 1510](https://github.com/rust-lang/rfcs/blob/master/text/1510-rdylib.md).
2925 Note that Cargo does not yet directly support cdylibs.
2930 * `os::windows::fs::OpenOptionsExt::access_mode`
2931 * `os::windows::fs::OpenOptionsExt::share_mode`
2932 * `os::windows::fs::OpenOptionsExt::custom_flags`
2933 * `os::windows::fs::OpenOptionsExt::attributes`
2934 * `os::windows::fs::OpenOptionsExt::security_qos_flags`
2935 * `os::unix::fs::OpenOptionsExt::custom_flags`
2936 * [`sync::Weak::new`](http://doc.rust-lang.org/alloc/arc/struct.Weak.html#method.new)
2937 * `Default for sync::Weak`
2938 * [`panic::set_hook`](http://doc.rust-lang.org/std/panic/fn.set_hook.html)
2939 * [`panic::take_hook`](http://doc.rust-lang.org/std/panic/fn.take_hook.html)
2940 * [`panic::PanicInfo`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html)
2941 * [`panic::PanicInfo::payload`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.payload)
2942 * [`panic::PanicInfo::location`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.location)
2943 * [`panic::Location`](http://doc.rust-lang.org/std/panic/struct.Location.html)
2944 * [`panic::Location::file`](http://doc.rust-lang.org/std/panic/struct.Location.html#method.file)
2945 * [`panic::Location::line`](http://doc.rust-lang.org/std/panic/struct.Location.html#method.line)
2946 * [`ffi::CStr::from_bytes_with_nul`](http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul)
2947 * [`ffi::CStr::from_bytes_with_nul_unchecked`](http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul_unchecked)
2948 * [`ffi::FromBytesWithNulError`](http://doc.rust-lang.org/std/ffi/struct.FromBytesWithNulError.html)
2949 * [`fs::Metadata::modified`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.modified)
2950 * [`fs::Metadata::accessed`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.accessed)
2951 * [`fs::Metadata::created`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.created)
2952 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange`
2953 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange_weak`
2954 * `collections::{btree,hash}_map::{Occupied,Vacant,}Entry::key`
2955 * `os::unix::net::{UnixStream, UnixListener, UnixDatagram, SocketAddr}`
2956 * [`SocketAddr::is_unnamed`](http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.is_unnamed)
2957 * [`SocketAddr::as_pathname`](http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.as_pathname)
2958 * [`UnixStream::connect`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.connect)
2959 * [`UnixStream::pair`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.pair)
2960 * [`UnixStream::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.try_clone)
2961 * [`UnixStream::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.local_addr)
2962 * [`UnixStream::peer_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.peer_addr)
2963 * [`UnixStream::set_read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
2964 * [`UnixStream::set_write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
2965 * [`UnixStream::read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
2966 * [`UnixStream::write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
2967 * [`UnixStream::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.set_nonblocking)
2968 * [`UnixStream::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.take_error)
2969 * [`UnixStream::shutdown`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.shutdown)
2970 * Read/Write/RawFd impls for `UnixStream`
2971 * [`UnixListener::bind`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.bind)
2972 * [`UnixListener::accept`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.accept)
2973 * [`UnixListener::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.try_clone)
2974 * [`UnixListener::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.local_addr)
2975 * [`UnixListener::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.set_nonblocking)
2976 * [`UnixListener::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.take_error)
2977 * [`UnixListener::incoming`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.incoming)
2978 * RawFd impls for `UnixListener`
2979 * [`UnixDatagram::bind`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.bind)
2980 * [`UnixDatagram::unbound`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.unbound)
2981 * [`UnixDatagram::pair`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.pair)
2982 * [`UnixDatagram::connect`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.connect)
2983 * [`UnixDatagram::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.try_clone)
2984 * [`UnixDatagram::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.local_addr)
2985 * [`UnixDatagram::peer_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.peer_addr)
2986 * [`UnixDatagram::recv_from`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv_from)
2987 * [`UnixDatagram::recv`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv)
2988 * [`UnixDatagram::send_to`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send_to)
2989 * [`UnixDatagram::send`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send)
2990 * [`UnixDatagram::set_read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_read_timeout)
2991 * [`UnixDatagram::set_write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_write_timeout)
2992 * [`UnixDatagram::read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.read_timeout)
2993 * [`UnixDatagram::write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.write_timeout)
2994 * [`UnixDatagram::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_nonblocking)
2995 * [`UnixDatagram::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.take_error)
2996 * [`UnixDatagram::shutdown`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.shutdown)
2997 * RawFd impls for `UnixDatagram`
2998 * `{BTree,Hash}Map::values_mut`
2999 * [`<[_]>::binary_search_by_key`](http://doc.rust-lang.org/beta/std/primitive.slice.html#method.binary_search_by_key)
3004 * [The `abs_sub` method of floats is deprecated](https://github.com/rust-lang/rust/pull/33664).
3005 The semantics of this minor method are subtle and probably not what
3007 * [Add implementation of Ord for Cell<T> and RefCell<T> where T: Ord](https://github.com/rust-lang/rust/pull/33306).
3008 * [On Linux, if `HashMap`s can't be initialized with `getrandom` they
3009 will fall back to `/dev/urandom` temporarily to avoid blocking
3010 during early boot](https://github.com/rust-lang/rust/pull/33086).
3011 * [Implemented negation for wrapping numerals](https://github.com/rust-lang/rust/pull/33067).
3012 * [Implement `Clone` for `binary_heap::IntoIter`](https://github.com/rust-lang/rust/pull/33050).
3013 * [Implement `Display` and `Hash` for `std::num::Wrapping`](https://github.com/rust-lang/rust/pull/33023).
3014 * [Add `Default` implementation for `&CStr`, `CString`](https://github.com/rust-lang/rust/pull/32990).
3015 * [Implement `From<Vec<T>>` and `Into<Vec<T>>` for `VecDeque<T>`](https://github.com/rust-lang/rust/pull/32866).
3016 * [Implement `Default` for `UnsafeCell`, `fmt::Error`, `Condvar`,
3017 `Mutex`, `RwLock`](https://github.com/rust-lang/rust/pull/32785).
3021 * [Cargo.toml supports the `profile.*.panic` option](https://github.com/rust-lang/cargo/pull/2687).
3022 This controls the runtime behavior of the `panic!` macro
3023 and can be either "unwind" (the default), or "abort".
3024 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
3025 * [Don't throw away errors with `-p` arguments](https://github.com/rust-lang/cargo/pull/2723).
3026 * [Report status to stderr instead of stdout](https://github.com/rust-lang/cargo/pull/2693).
3027 * [Build scripts are passed a `CARGO_MANIFEST_LINKS` environment
3028 variable that corresponds to the `links` field of the manifest](https://github.com/rust-lang/cargo/pull/2710).
3029 * [Ban keywords from crate names](https://github.com/rust-lang/cargo/pull/2707).
3030 * [Canonicalize `CARGO_HOME` on Windows](https://github.com/rust-lang/cargo/pull/2604).
3031 * [Retry network requests](https://github.com/rust-lang/cargo/pull/2396).
3032 By default they are retried twice, which can be customized with the
3033 `net.retry` value in `.cargo/config`.
3034 * [Don't print extra error info for failing subcommands](https://github.com/rust-lang/cargo/pull/2674).
3035 * [Add `--force` flag to `cargo install`](https://github.com/rust-lang/cargo/pull/2405).
3036 * [Don't use `flock` on NFS mounts](https://github.com/rust-lang/cargo/pull/2623).
3037 * [Prefer building `cargo install` artifacts in temporary directories](https://github.com/rust-lang/cargo/pull/2610).
3038 Makes it possible to install multiple crates in parallel.
3039 * [Add `cargo test --doc`](https://github.com/rust-lang/cargo/pull/2578).
3040 * [Add `cargo --explain`](https://github.com/rust-lang/cargo/pull/2551).
3041 * [Don't print warnings when `-q` is passed](https://github.com/rust-lang/cargo/pull/2576).
3042 * [Add `cargo doc --lib` and `--bin`](https://github.com/rust-lang/cargo/pull/2577).
3043 * [Don't require build script output to be UTF-8](https://github.com/rust-lang/cargo/pull/2560).
3044 * [Correctly attempt multiple git usernames](https://github.com/rust-lang/cargo/pull/2584).
3049 * [rustc memory usage was reduced by refactoring the context used for
3050 type checking](https://github.com/rust-lang/rust/pull/33425).
3051 * [Speed up creation of `HashMap`s by caching the random keys used
3052 to initialize the hash state](https://github.com/rust-lang/rust/pull/33318).
3053 * [The `find` implementation for `Chain` iterators is 2x faster](https://github.com/rust-lang/rust/pull/33289).
3054 * [Trait selection optimizations speed up type checking by 15%](https://github.com/rust-lang/rust/pull/33138).
3055 * [Efficient trie lookup for boolean Unicode properties](https://github.com/rust-lang/rust/pull/33098).
3056 10x faster than the previous lookup tables.
3057 * [Special case `#[derive(Copy, Clone)]` to avoid bloat](https://github.com/rust-lang/rust/pull/31414).
3062 * Many incremental improvements to documentation and rustdoc.
3063 * [rustdoc: List blanket trait impls](https://github.com/rust-lang/rust/pull/33514).
3064 * [rustdoc: Clean up ABI rendering](https://github.com/rust-lang/rust/pull/33151).
3065 * [Indexing with the wrong type produces a more informative error](https://github.com/rust-lang/rust/pull/33401).
3066 * [Improve diagnostics for constants being used in irrefutable patterns](https://github.com/rust-lang/rust/pull/33406).
3067 * [When many method candidates are in scope limit the suggestions to 10](https://github.com/rust-lang/rust/pull/33338).
3068 * [Remove confusing suggestion when calling a `fn` type](https://github.com/rust-lang/rust/pull/33325).
3069 * [Do not suggest changing `&mut self` to `&mut mut self`](https://github.com/rust-lang/rust/pull/33319).
3074 * [Update i686-linux-android features to match Android ABI](https://github.com/rust-lang/rust/pull/33651).
3075 * [Update aarch64-linux-android features to match Android ABI](https://github.com/rust-lang/rust/pull/33500).
3076 * [`std` no longer prints backtraces on platforms where the running
3077 module must be loaded with `env::current_exe`, which can't be relied
3078 on](https://github.com/rust-lang/rust/pull/33554).
3079 * This release includes std binaries for the i586-unknown-linux-gnu,
3080 i686-unknown-linux-musl, and armv7-linux-androideabi targets. The
3081 i586 target is for old x86 hardware without SSE2, and the armv7
3082 target is for Android running on modern ARM architectures.
3083 * [The `rust-gdb` and `rust-lldb` scripts are distributed on all
3084 Unix platforms](https://github.com/rust-lang/rust/pull/32835).
3085 * [On Unix the runtime aborts by calling `libc::abort` instead of
3086 generating an illegal instruction](https://github.com/rust-lang/rust/pull/31457).
3087 * [Rust is now bootstrapped from the previous release of Rust,
3088 instead of a snapshot from an arbitrary commit](https://github.com/rust-lang/rust/pull/32942).
3093 * [`AtomicBool` is now bool-sized, not word-sized](https://github.com/rust-lang/rust/pull/33579).
3094 * [`target_env` for Linux ARM targets is just `gnu`, not
3095 `gnueabihf`, `gnueabi`, etc](https://github.com/rust-lang/rust/pull/33403).
3096 * [Consistently panic on overflow in `Duration::new`](https://github.com/rust-lang/rust/pull/33072).
3097 * [Change `String::truncate` to panic less](https://github.com/rust-lang/rust/pull/32977).
3098 * [Add `:block` to the follow set for `:ty` and `:path`](https://github.com/rust-lang/rust/pull/32945).
3099 Affects how macros are parsed.
3100 * [Fix macro hygiene bug](https://github.com/rust-lang/rust/pull/32923).
3101 * [Feature-gated attributes on macro-generated macro invocations are
3102 now rejected](https://github.com/rust-lang/rust/pull/32791).
3103 * [Suppress fallback and ambiguity errors during type inference](https://github.com/rust-lang/rust/pull/32258).
3104 This caused some minor changes to type inference.
3107 Version 1.9.0 (2016-05-26)
3108 ==========================
3113 * The `#[deprecated]` attribute when applied to an API will generate
3114 warnings when used. The warnings may be suppressed with
3115 `#[allow(deprecated)]`. [RFC 1270].
3116 * [`fn` item types are zero sized, and each `fn` names a unique
3117 type][1.9fn]. This will break code that transmutes `fn`s, so calling
3118 `transmute` on a `fn` type will generate a warning for a few cycles,
3119 then will be converted to an error.
3120 * [Field and method resolution understand visibility, so private
3121 fields and methods cannot prevent the proper use of public fields
3122 and methods][1.9fv].
3123 * [The parser considers unicode codepoints in the
3124 `PATTERN_WHITE_SPACE` category to be whitespace][1.9ws].
3130 * [`std::panic::catch_unwind`][] (renamed from `recover`)
3131 * [`std::panic::resume_unwind`][] (renamed from `propagate`)
3132 * [`std::panic::AssertUnwindSafe`][] (renamed from `AssertRecoverSafe`)
3133 * [`std::panic::UnwindSafe`][] (renamed from `RecoverSafe`)
3134 * [`str::is_char_boundary`]
3135 * [`<*const T>::as_ref`]
3136 * [`<*mut T>::as_ref`]
3137 * [`<*mut T>::as_mut`]
3138 * [`AsciiExt::make_ascii_uppercase`]
3139 * [`AsciiExt::make_ascii_lowercase`]
3140 * [`char::decode_utf16`]
3141 * [`char::DecodeUtf16`]
3142 * [`char::DecodeUtf16Error`]
3143 * [`char::DecodeUtf16Error::unpaired_surrogate`]
3144 * [`BTreeSet::take`]
3145 * [`BTreeSet::replace`]
3148 * [`HashSet::replace`]
3150 * [`OsString::with_capacity`]
3151 * [`OsString::clear`]
3152 * [`OsString::capacity`]
3153 * [`OsString::reserve`]
3154 * [`OsString::reserve_exact`]
3155 * [`OsStr::is_empty`]
3157 * [`std::os::unix::thread`]
3160 * [`JoinHandleExt::as_pthread_t`]
3161 * [`JoinHandleExt::into_pthread_t`]
3162 * [`HashSet::hasher`]
3163 * [`HashMap::hasher`]
3164 * [`CommandExt::exec`]
3165 * [`File::try_clone`]
3166 * [`SocketAddr::set_ip`]
3167 * [`SocketAddr::set_port`]
3168 * [`SocketAddrV4::set_ip`]
3169 * [`SocketAddrV4::set_port`]
3170 * [`SocketAddrV6::set_ip`]
3171 * [`SocketAddrV6::set_port`]
3172 * [`SocketAddrV6::set_flowinfo`]
3173 * [`SocketAddrV6::set_scope_id`]
3174 * [`slice::copy_from_slice`]
3175 * [`ptr::read_volatile`]
3176 * [`ptr::write_volatile`]
3177 * [`OpenOptions::create_new`]
3178 * [`TcpStream::set_nodelay`]
3179 * [`TcpStream::nodelay`]
3180 * [`TcpStream::set_ttl`]
3181 * [`TcpStream::ttl`]
3182 * [`TcpStream::set_only_v6`]
3183 * [`TcpStream::only_v6`]
3184 * [`TcpStream::take_error`]
3185 * [`TcpStream::set_nonblocking`]
3186 * [`TcpListener::set_ttl`]
3187 * [`TcpListener::ttl`]
3188 * [`TcpListener::set_only_v6`]
3189 * [`TcpListener::only_v6`]
3190 * [`TcpListener::take_error`]
3191 * [`TcpListener::set_nonblocking`]
3192 * [`UdpSocket::set_broadcast`]
3193 * [`UdpSocket::broadcast`]
3194 * [`UdpSocket::set_multicast_loop_v4`]
3195 * [`UdpSocket::multicast_loop_v4`]
3196 * [`UdpSocket::set_multicast_ttl_v4`]
3197 * [`UdpSocket::multicast_ttl_v4`]
3198 * [`UdpSocket::set_multicast_loop_v6`]
3199 * [`UdpSocket::multicast_loop_v6`]
3200 * [`UdpSocket::set_multicast_ttl_v6`]
3201 * [`UdpSocket::multicast_ttl_v6`]
3202 * [`UdpSocket::set_ttl`]
3203 * [`UdpSocket::ttl`]
3204 * [`UdpSocket::set_only_v6`]
3205 * [`UdpSocket::only_v6`]
3206 * [`UdpSocket::join_multicast_v4`]
3207 * [`UdpSocket::join_multicast_v6`]
3208 * [`UdpSocket::leave_multicast_v4`]
3209 * [`UdpSocket::leave_multicast_v6`]
3210 * [`UdpSocket::take_error`]
3211 * [`UdpSocket::connect`]
3212 * [`UdpSocket::send`]
3213 * [`UdpSocket::recv`]
3214 * [`UdpSocket::set_nonblocking`]
3219 * [`std::sync::Once` is poisoned if its initialization function
3221 * [`cell::Ref` and `cell::RefMut` can contain unsized types][1.9cu].
3222 * [Most types implement `fmt::Debug`][1.9db].
3223 * [The default buffer size used by `BufReader` and `BufWriter` was
3224 reduced to 8K, from 64K][1.9bf]. This is in line with the buffer size
3225 used by other languages.
3226 * [`Instant`, `SystemTime` and `Duration` implement `+=` and `-=`.
3227 `Duration` additionally implements `*=` and `/=`][1.9ta].
3228 * [`Skip` is a `DoubleEndedIterator`][1.9sk].
3229 * [`From<[u8; 4]>` is implemented for `Ipv4Addr`][1.9fi].
3230 * [`Chain` implements `BufRead`][1.9ch].
3231 * [`HashMap`, `HashSet` and iterators are covariant][1.9hc].
3236 * [Cargo can now run concurrently][1.9cc].
3237 * [Top-level overrides allow specific revisions of crates to be
3238 overridden through the entire crate graph][1.9ct]. This is intended
3239 to make upgrades easier for large projects, by allowing crates to be
3240 forked temporarily until they've been upgraded and republished.
3241 * [Cargo exports a `CARGO_PKG_AUTHORS` environment variable][1.9cp].
3242 * [Cargo will pass the contents of the `RUSTFLAGS` variable to `rustc`
3243 on the commandline][1.9cf]. `rustc` arguments can also be specified
3244 in the `build.rustflags` configuration key.
3249 * [The time complexity of comparing variables for equivalence during type
3250 unification is reduced from _O_(_n_!) to _O_(_n_)][1.9tu]. This leads
3251 to major compilation time improvement in some scenarios.
3252 * [`ToString` is specialized for `str`, giving it the same performance
3253 as `to_owned`][1.9ts].
3254 * [Spawning processes with `Command::output` no longer creates extra
3256 * [`#[derive(PartialEq)]` and `#[derive(PartialOrd)]` emit less code
3257 for C-like enums][1.9cl].
3262 * [Passing the `--quiet` flag to a test runner will produce
3263 much-abbreviated output][1.9q].
3264 * The Rust Project now publishes std binaries for the
3265 `mips-unknown-linux-musl`, `mipsel-unknown-linux-musl`, and
3266 `i586-pc-windows-msvc` targets.
3271 * [`std::sync::Once` is poisoned if its initialization function
3273 * [It is illegal to define methods with the same name in overlapping
3274 inherent `impl` blocks][1.9sn].
3275 * [`fn` item types are zero sized, and each `fn` names a unique
3276 type][1.9fn]. This will break code that transmutes `fn`s, so calling
3277 `transmute` on a `fn` type will generate a warning for a few cycles,
3278 then will be converted to an error.
3279 * [Improvements to const evaluation may trigger new errors when integer
3280 literals are out of range][1.9ce].
3283 [1.9bf]: https://github.com/rust-lang/rust/pull/32695
3284 [1.9cc]: https://github.com/rust-lang/cargo/pull/2486
3285 [1.9ce]: https://github.com/rust-lang/rust/pull/30587
3286 [1.9cf]: https://github.com/rust-lang/cargo/pull/2241
3287 [1.9ch]: https://github.com/rust-lang/rust/pull/32541
3288 [1.9cl]: https://github.com/rust-lang/rust/pull/31977
3289 [1.9cp]: https://github.com/rust-lang/cargo/pull/2465
3290 [1.9ct]: https://github.com/rust-lang/cargo/pull/2385
3291 [1.9cu]: https://github.com/rust-lang/rust/pull/32652
3292 [1.9db]: https://github.com/rust-lang/rust/pull/32054
3293 [1.9fi]: https://github.com/rust-lang/rust/pull/32050
3294 [1.9fn]: https://github.com/rust-lang/rust/pull/31710
3295 [1.9fv]: https://github.com/rust-lang/rust/pull/31938
3296 [1.9hc]: https://github.com/rust-lang/rust/pull/32635
3297 [1.9o]: https://github.com/rust-lang/rust/pull/32325
3298 [1.9q]: https://github.com/rust-lang/rust/pull/31887
3299 [1.9sk]: https://github.com/rust-lang/rust/pull/31700
3300 [1.9sn]: https://github.com/rust-lang/rust/pull/31925
3301 [1.9sp]: https://github.com/rust-lang/rust/pull/31618
3302 [1.9ta]: https://github.com/rust-lang/rust/pull/32448
3303 [1.9ts]: https://github.com/rust-lang/rust/pull/32586
3304 [1.9tu]: https://github.com/rust-lang/rust/pull/32062
3305 [1.9ws]: https://github.com/rust-lang/rust/pull/29734
3306 [RFC 1270]: https://github.com/rust-lang/rfcs/blob/master/text/1270-deprecation.md
3307 [`<*const T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
3308 [`<*mut T>::as_mut`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_mut
3309 [`<*mut T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
3310 [`slice::copy_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.copy_from_slice
3311 [`AsciiExt::make_ascii_lowercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_lowercase
3312 [`AsciiExt::make_ascii_uppercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_uppercase
3313 [`BTreeSet::get`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.get
3314 [`BTreeSet::replace`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.replace
3315 [`BTreeSet::take`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.take
3316 [`CommandExt::exec`]: http://doc.rust-lang.org/nightly/std/os/unix/process/trait.CommandExt.html#tymethod.exec
3317 [`File::try_clone`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html#method.try_clone
3318 [`HashMap::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.hasher
3319 [`HashSet::get`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.get
3320 [`HashSet::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.hasher
3321 [`HashSet::replace`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.replace
3322 [`HashSet::take`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.take
3323 [`JoinHandleExt::as_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.as_pthread_t
3324 [`JoinHandleExt::into_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.into_pthread_t
3325 [`JoinHandleExt`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html
3326 [`OpenOptions::create_new`]: http://doc.rust-lang.org/nightly/std/fs/struct.OpenOptions.html#method.create_new
3327 [`OsStr::is_empty`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.is_empty
3328 [`OsStr::len`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.len
3329 [`OsString::capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.capacity
3330 [`OsString::clear`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.clear
3331 [`OsString::reserve_exact`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve_exact
3332 [`OsString::reserve`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve
3333 [`OsString::with_capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.with_capacity
3334 [`RawPthread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/type.RawPthread.html
3335 [`SocketAddr::set_ip`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_ip
3336 [`SocketAddr::set_port`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_port
3337 [`SocketAddrV4::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_ip
3338 [`SocketAddrV4::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_port
3339 [`SocketAddrV6::set_flowinfo`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_flowinfo
3340 [`SocketAddrV6::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_ip
3341 [`SocketAddrV6::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_port
3342 [`SocketAddrV6::set_scope_id`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_scope_id
3343 [`TcpListener::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
3344 [`TcpListener::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
3345 [`TcpListener::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
3346 [`TcpListener::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
3347 [`TcpListener::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
3348 [`TcpListener::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
3349 [`TcpStream::nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.nodelay
3350 [`TcpStream::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
3351 [`TcpStream::set_nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nodelay
3352 [`TcpStream::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
3353 [`TcpStream::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
3354 [`TcpStream::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
3355 [`TcpStream::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
3356 [`TcpStream::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
3357 [`UdpSocket::broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.broadcast
3358 [`UdpSocket::connect`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.connect
3359 [`UdpSocket::join_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v4
3360 [`UdpSocket::join_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v6
3361 [`UdpSocket::leave_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v4
3362 [`UdpSocket::leave_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v6
3363 [`UdpSocket::multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v4
3364 [`UdpSocket::multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v6
3365 [`UdpSocket::multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v4
3366 [`UdpSocket::multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v6
3367 [`UdpSocket::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.only_v6
3368 [`UdpSocket::recv`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.recv
3369 [`UdpSocket::send`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.send
3370 [`UdpSocket::set_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_broadcast
3371 [`UdpSocket::set_multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v4
3372 [`UdpSocket::set_multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v6
3373 [`UdpSocket::set_multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v4
3374 [`UdpSocket::set_multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v6
3375 [`UdpSocket::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_nonblocking
3376 [`UdpSocket::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_only_v6
3377 [`UdpSocket::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_ttl
3378 [`UdpSocket::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.take_error
3379 [`UdpSocket::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.ttl
3380 [`char::DecodeUtf16Error::unpaired_surrogate`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html#method.unpaired_surrogate
3381 [`char::DecodeUtf16Error`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html
3382 [`char::DecodeUtf16`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16.html
3383 [`char::decode_utf16`]: http://doc.rust-lang.org/nightly/std/char/fn.decode_utf16.html
3384 [`ptr::read_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.read_volatile.html
3385 [`ptr::write_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.write_volatile.html
3386 [`std::os::unix::thread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/index.html
3387 [`std::panic::AssertUnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/struct.AssertUnwindSafe.html
3388 [`std::panic::UnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/trait.UnwindSafe.html
3389 [`std::panic::catch_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.catch_unwind.html
3390 [`std::panic::resume_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.resume_unwind.html
3391 [`std::panic`]: http://doc.rust-lang.org/nightly/std/panic/index.html
3392 [`str::is_char_boundary`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.is_char_boundary
3395 Version 1.8.0 (2016-04-14)
3396 ==========================
3401 * Rust supports overloading of compound assignment statements like
3402 `+=` by implementing the [`AddAssign`], [`SubAssign`],
3403 [`MulAssign`], [`DivAssign`], [`RemAssign`], [`BitAndAssign`],
3404 [`BitOrAssign`], [`BitXorAssign`], [`ShlAssign`], or [`ShrAssign`]
3406 * Empty structs can be defined with braces, as in `struct Foo { }`, in
3407 addition to the non-braced form, `struct Foo;`. [RFC 218].
3413 * [`str::encode_utf16`][] (renamed from `utf16_units`)
3414 * [`str::EncodeUtf16`][] (renamed from `Utf16Units`)
3417 * [`ptr::drop_in_place`]
3419 * [`time::SystemTime`]
3421 * [`Instant::duration_since`][] (renamed from `duration_from_earlier`)
3422 * [`Instant::elapsed`]
3423 * [`SystemTime::now`]
3424 * [`SystemTime::duration_since`][] (renamed from `duration_from_earlier`)
3425 * [`SystemTime::elapsed`]
3426 * Various `Add`/`Sub` impls for `Time` and `SystemTime`
3427 * [`SystemTimeError`]
3428 * [`SystemTimeError::duration`]
3429 * Various impls for `SystemTimeError`
3431 * [`AddAssign`], [`SubAssign`], [`MulAssign`], [`DivAssign`],
3432 [`RemAssign`], [`BitAndAssign`], [`BitOrAssign`],
3433 [`BitXorAssign`], [`ShlAssign`], [`ShrAssign`].
3434 * [The `write!` and `writeln!` macros correctly emit errors if any of
3435 their arguments can't be formatted][1.8w].
3436 * [Various I/O functions support large files on 32-bit Linux][1.8l].
3437 * [The Unix-specific `raw` modules, which contain a number of
3438 redefined C types are deprecated][1.8r], including `os::raw::unix`,
3439 `os::raw::macos`, and `os::raw::linux`. These modules defined types
3440 such as `ino_t` and `dev_t`. The inconsistency of these definitions
3441 across platforms was making it difficult to implement `std`
3442 correctly. Those that need these definitions should use the `libc`
3444 * The Unix-specific `MetadataExt` traits, including
3445 `os::unix::fs::MetadataExt`, which expose values such as inode
3446 numbers [no longer return platform-specific types][1.8r], but
3447 instead return widened integers. [RFC 1415].
3448 * [`btree_set::{IntoIter, Iter, Range}` are covariant][1.8cv].
3449 * [Atomic loads and stores are not volatile][1.8a].
3450 * [All types in `sync::mpsc` implement `fmt::Debug`][1.8mp].
3455 * [Inlining hash functions lead to a 3% compile-time improvement in
3456 some workloads][1.8h].
3457 * When using jemalloc, its symbols are [unprefixed so that it
3458 overrides the libc malloc implementation][1.8h]. This means that for
3459 rustc, LLVM is now using jemalloc, which results in a 6%
3460 compile-time improvement on a specific workload.
3461 * [Avoid quadratic growth in function size due to cleanups][1.8cu].
3466 * [32-bit MSVC builds finally implement unwinding][1.8ms].
3467 i686-pc-windows-msvc is now considered a tier-1 platform.
3468 * [The `--print targets` flag prints a list of supported targets][1.8t].
3469 * [The `--print cfg` flag prints the `cfg`s defined for the current
3471 * [`rustc` can be built with an new Cargo-based build system, written
3472 in Rust][1.8b]. It will eventually replace Rust's Makefile-based
3473 build system. To enable it configure with `configure --rustbuild`.
3474 * [Errors for non-exhaustive `match` patterns now list up to 3 missing
3475 variants while also indicating the total number of missing variants
3476 if more than 3][1.8m].
3477 * [Executable stacks are disabled on Linux and BSD][1.8nx].
3478 * The Rust Project now publishes binary releases of the standard
3479 library for a number of tier-2 targets:
3480 `armv7-unknown-linux-gnueabihf`, `powerpc-unknown-linux-gnu`,
3481 `powerpc64-unknown-linux-gnu`, `powerpc64le-unknown-linux-gnu`
3482 `x86_64-rumprun-netbsd`. These can be installed with
3483 tools such as [multirust][1.8mr].
3488 * [`cargo init` creates a new Cargo project in the current
3489 directory][1.8ci]. It is otherwise like `cargo new`.
3490 * [Cargo has configuration keys for `-v` and
3491 `--color`][1.8cc]. `verbose` and `color`, respectively, go in the
3492 `[term]` section of `.cargo/config`.
3493 * [Configuration keys that evaluate to strings or integers can be set
3494 via environment variables][1.8ce]. For example the `build.jobs` key
3495 can be set via `CARGO_BUILD_JOBS`. Environment variables take
3496 precedence over config files.
3497 * [Target-specific dependencies support Rust `cfg` syntax for
3498 describing targets][1.8cfg] so that dependencies for multiple
3499 targets can be specified together. [RFC 1361].
3500 * [The environment variables `CARGO_TARGET_ROOT`, `RUSTC`, and
3501 `RUSTDOC` take precedence over the `build.target-dir`,
3502 `build.rustc`, and `build.rustdoc` configuration values][1.8cv].
3503 * [The child process tree is killed on Windows when Cargo is
3505 * [The `build.target` configuration value sets the target platform,
3506 like `--target`][1.8ct].
3511 * [Unstable compiler flags have been further restricted][1.8u]. Since
3512 1.0 `-Z` flags have been considered unstable, and other flags that
3513 were considered unstable additionally required passing `-Z
3514 unstable-options` to access. Unlike unstable language and library
3515 features though, these options have been accessible on the stable
3516 release channel. Going forward, *new unstable flags will not be
3517 available on the stable release channel*, and old unstable flags
3518 will warn about their usage. In the future, all unstable flags will
3519 be unavailable on the stable release channel.
3520 * [It is no longer possible to `match` on empty enum variants using
3521 the `Variant(..)` syntax][1.8v]. This has been a warning since 1.6.
3522 * The Unix-specific `MetadataExt` traits, including
3523 `os::unix::fs::MetadataExt`, which expose values such as inode
3524 numbers [no longer return platform-specific types][1.8r], but
3525 instead return widened integers. [RFC 1415].
3526 * [Modules sourced from the filesystem cannot appear within arbitrary
3527 blocks, but only within other modules][1.8mf].
3528 * [`--cfg` compiler flags are parsed strictly as identifiers][1.8c].
3529 * On Unix, [stack overflow triggers a runtime abort instead of a
3531 * [`Command::spawn` and its equivalents return an error if any of
3532 its command-line arguments contain interior `NUL`s][1.8n].
3533 * [Tuple and unit enum variants from other crates are in the type
3535 * [On Windows `rustc` emits `.lib` files for the `staticlib` library
3536 type instead of `.a` files][1.8st]. Additionally, for the MSVC
3537 toolchain, `rustc` emits import libraries named `foo.dll.lib`
3538 instead of `foo.lib`.
3541 [1.8a]: https://github.com/rust-lang/rust/pull/30962
3542 [1.8b]: https://github.com/rust-lang/rust/pull/31123
3543 [1.8c]: https://github.com/rust-lang/rust/pull/31530
3544 [1.8cc]: https://github.com/rust-lang/cargo/pull/2397
3545 [1.8ce]: https://github.com/rust-lang/cargo/pull/2398
3546 [1.8cf]: https://github.com/rust-lang/rust/pull/31278
3547 [1.8cfg]: https://github.com/rust-lang/cargo/pull/2328
3548 [1.8ci]: https://github.com/rust-lang/cargo/pull/2081
3549 [1.8ck]: https://github.com/rust-lang/cargo/pull/2370
3550 [1.8ct]: https://github.com/rust-lang/cargo/pull/2335
3551 [1.8cu]: https://github.com/rust-lang/rust/pull/31390
3552 [1.8cv]: https://github.com/rust-lang/cargo/issues/2365
3553 [1.8cv]: https://github.com/rust-lang/rust/pull/30998
3554 [1.8h]: https://github.com/rust-lang/rust/pull/31460
3555 [1.8l]: https://github.com/rust-lang/rust/pull/31668
3556 [1.8m]: https://github.com/rust-lang/rust/pull/31020
3557 [1.8mf]: https://github.com/rust-lang/rust/pull/31534
3558 [1.8mp]: https://github.com/rust-lang/rust/pull/30894
3559 [1.8mr]: https://users.rust-lang.org/t/multirust-0-8-with-cross-std-installation/4901
3560 [1.8ms]: https://github.com/rust-lang/rust/pull/30448
3561 [1.8n]: https://github.com/rust-lang/rust/pull/31056
3562 [1.8nx]: https://github.com/rust-lang/rust/pull/30859
3563 [1.8r]: https://github.com/rust-lang/rust/pull/31551
3564 [1.8so]: https://github.com/rust-lang/rust/pull/31333
3565 [1.8st]: https://github.com/rust-lang/rust/pull/29520
3566 [1.8t]: https://github.com/rust-lang/rust/pull/31358
3567 [1.8tn]: https://github.com/rust-lang/rust/pull/30882
3568 [1.8u]: https://github.com/rust-lang/rust/pull/31793
3569 [1.8v]: https://github.com/rust-lang/rust/pull/31757
3570 [1.8w]: https://github.com/rust-lang/rust/pull/31904
3571 [RFC 1361]: https://github.com/rust-lang/rfcs/blob/master/text/1361-cargo-cfg-dependencies.md
3572 [RFC 1415]: https://github.com/rust-lang/rfcs/blob/master/text/1415-trim-std-os.md
3573 [RFC 218]: https://github.com/rust-lang/rfcs/blob/master/text/0218-empty-struct-with-braces.md
3574 [RFC 953]: https://github.com/rust-lang/rfcs/blob/master/text/0953-op-assign.md
3575 [`AddAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.AddAssign.html
3576 [`BitAndAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitAndAssign.html
3577 [`BitOrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitOrAssign.html
3578 [`BitXorAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitXorAssign.html
3579 [`DivAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.DivAssign.html
3580 [`Instant::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.duration_since
3581 [`Instant::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.elapsed
3582 [`Instant::now`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.now
3583 [`MulAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.MulAssign.html
3584 [`Ref::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.Ref.html#method.map
3585 [`RefMut::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.RefMut.html#method.map
3586 [`RemAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.RemAssign.html
3587 [`ShlAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShlAssign.html
3588 [`ShrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShrAssign.html
3589 [`SubAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.SubAssign.html
3590 [`SystemTime::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.duration_since
3591 [`SystemTime::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.elapsed
3592 [`SystemTime::now`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.now
3593 [`SystemTimeError::duration`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html#method.duration
3594 [`SystemTimeError`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html
3595 [`UNIX_EPOCH`]: http://doc.rust-lang.org/nightly/std/time/constant.UNIX_EPOCH.html
3596 [`ptr::drop_in_place`]: http://doc.rust-lang.org/nightly/std/ptr/fn.drop_in_place.html
3597 [`str::EncodeUtf16`]: http://doc.rust-lang.org/nightly/std/str/struct.EncodeUtf16.html
3598 [`str::encode_utf16`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.encode_utf16
3599 [`time::Instant`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html
3600 [`time::SystemTime`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html
3603 Version 1.7.0 (2016-03-03)
3604 ==========================
3611 * [`Path::strip_prefix`][] (renamed from relative_from)
3612 * [`path::StripPrefixError`][] (new error type returned from strip_prefix)
3614 * [`Ipv4Addr::is_loopback`]
3615 * [`Ipv4Addr::is_private`]
3616 * [`Ipv4Addr::is_link_local`]
3617 * [`Ipv4Addr::is_multicast`]
3618 * [`Ipv4Addr::is_broadcast`]
3619 * [`Ipv4Addr::is_documentation`]
3621 * [`Ipv6Addr::is_unspecified`]
3622 * [`Ipv6Addr::is_loopback`]
3623 * [`Ipv6Addr::is_multicast`]
3626 * [`Vec::as_mut_slice`]
3628 * [`String::as_str`]
3629 * [`String::as_mut_str`]
3631 * `<[T]>::`[`clone_from_slice`], which now requires the two slices to
3633 * `<[T]>::`[`sort_by_key`]
3634 * checked, saturated, and overflowing operations
3635 * [`i32::checked_rem`], [`i32::checked_neg`], [`i32::checked_shl`], [`i32::checked_shr`]
3636 * [`i32::saturating_mul`]
3637 * [`i32::overflowing_add`], [`i32::overflowing_sub`], [`i32::overflowing_mul`], [`i32::overflowing_div`]
3638 * [`i32::overflowing_rem`], [`i32::overflowing_neg`], [`i32::overflowing_shl`], [`i32::overflowing_shr`]
3639 * [`u32::checked_rem`], [`u32::checked_neg`], [`u32::checked_shl`], [`u32::checked_shl`]
3640 * [`u32::saturating_mul`]
3641 * [`u32::overflowing_add`], [`u32::overflowing_sub`], [`u32::overflowing_mul`], [`u32::overflowing_div`]
3642 * [`u32::overflowing_rem`], [`u32::overflowing_neg`], [`u32::overflowing_shl`], [`u32::overflowing_shr`]
3643 * and checked, saturated, and overflowing operations for other primitive types
3645 * [`ffi::IntoStringError`]
3646 * [`CString::into_string`]
3647 * [`CString::into_bytes`]
3648 * [`CString::into_bytes_with_nul`]
3649 * `From<CString> for Vec<u8>`
3651 * [`IntoStringError::into_cstring`]
3652 * [`IntoStringError::utf8_error`]
3653 * `Error for IntoStringError`
3655 * [`std::hash::BuildHasher`]
3656 * [`BuildHasher::Hasher`]
3657 * [`BuildHasher::build_hasher`]
3658 * [`std::hash::BuildHasherDefault`]
3659 * [`HashMap::with_hasher`]
3660 * [`HashMap::with_capacity_and_hasher`]
3661 * [`HashSet::with_hasher`]
3662 * [`HashSet::with_capacity_and_hasher`]
3663 * [`std::collections::hash_map::RandomState`]
3664 * [`RandomState::new`]
3665 * [Validating UTF-8 is faster by a factor of between 7 and 14x for
3666 ASCII input][1.7utf8]. This means that creating `String`s and `str`s
3667 from bytes is faster.
3668 * [The performance of `LineWriter` (and thus `io::stdout`) was
3669 improved by using `memchr` to search for newlines][1.7m].
3670 * [`f32::to_degrees` and `f32::to_radians` are stable][1.7f]. The
3671 `f64` variants were stabilized previously.
3672 * [`BTreeMap` was rewritten to use less memory and improve the performance
3673 of insertion and iteration, the latter by as much as 5x][1.7bm].
3674 * [`BTreeSet` and its iterators, `Iter`, `IntoIter`, and `Range` are
3675 covariant over their contained type][1.7bt].
3676 * [`LinkedList` and its iterators, `Iter` and `IntoIter` are covariant
3677 over their contained type][1.7ll].
3678 * [`str::replace` now accepts a `Pattern`][1.7rp], like other string
3680 * [`Any` is implemented for unsized types][1.7a].
3681 * [`Hash` is implemented for `Duration`][1.7h].
3686 * [When running tests with `--test`, rustdoc will pass `--cfg`
3687 arguments to the compiler][1.7dt].
3688 * [The compiler is built with RPATH information by default][1.7rpa].
3689 This means that it will be possible to run `rustc` when installed in
3690 unusual configurations without configuring the dynamic linker search
3692 * [`rustc` passes `--enable-new-dtags` to GNU ld][1.7dta]. This makes
3693 any RPATH entries (emitted with `-C rpath`) *not* take precedence
3694 over `LD_LIBRARY_PATH`.
3699 * [`cargo rustc` accepts a `--profile` flag that runs `rustc` under
3700 any of the compilation profiles, 'dev', 'bench', or 'test'][1.7cp].
3701 * [The `rerun-if-changed` build script directive no longer causes the
3702 build script to incorrectly run twice in certain scenarios][1.7rr].
3707 * Soundness fixes to the interactions between associated types and
3708 lifetimes, specified in [RFC 1214], [now generate errors][1.7sf] for
3709 code that violates the new rules. This is a significant change that
3710 is known to break existing code, so it has emitted warnings for the
3711 new error cases since 1.4 to give crate authors time to adapt. The
3712 details of what is changing are subtle; read the RFC for more.
3713 * [Several bugs in the compiler's visibility calculations were
3714 fixed][1.7v]. Since this was found to break significant amounts of
3715 code, the new errors will be emitted as warnings for several release
3716 cycles, under the `private_in_public` lint.
3717 * Defaulted type parameters were accidentally accepted in positions
3718 that were not intended. In this release, [defaulted type parameters
3719 appearing outside of type definitions will generate a
3720 warning][1.7d], which will become an error in future releases.
3721 * [Parsing "." as a float results in an error instead of 0][1.7p].
3722 That is, `".".parse::<f32>()` returns `Err`, not `Ok(0.0)`.
3723 * [Borrows of closure parameters may not outlive the closure][1.7bc].
3725 [1.7a]: https://github.com/rust-lang/rust/pull/30928
3726 [1.7bc]: https://github.com/rust-lang/rust/pull/30341
3727 [1.7bm]: https://github.com/rust-lang/rust/pull/30426
3728 [1.7bt]: https://github.com/rust-lang/rust/pull/30998
3729 [1.7cp]: https://github.com/rust-lang/cargo/pull/2224
3730 [1.7d]: https://github.com/rust-lang/rust/pull/30724
3731 [1.7dt]: https://github.com/rust-lang/rust/pull/30372
3732 [1.7dta]: https://github.com/rust-lang/rust/pull/30394
3733 [1.7f]: https://github.com/rust-lang/rust/pull/30672
3734 [1.7h]: https://github.com/rust-lang/rust/pull/30818
3735 [1.7ll]: https://github.com/rust-lang/rust/pull/30663
3736 [1.7m]: https://github.com/rust-lang/rust/pull/30381
3737 [1.7p]: https://github.com/rust-lang/rust/pull/30681
3738 [1.7rp]: https://github.com/rust-lang/rust/pull/29498
3739 [1.7rpa]: https://github.com/rust-lang/rust/pull/30353
3740 [1.7rr]: https://github.com/rust-lang/cargo/pull/2279
3741 [1.7sf]: https://github.com/rust-lang/rust/pull/30389
3742 [1.7utf8]: https://github.com/rust-lang/rust/pull/30740
3743 [1.7v]: https://github.com/rust-lang/rust/pull/29973
3744 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
3745 [`BuildHasher::Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
3746 [`BuildHasher::build_hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html#tymethod.build_hasher
3747 [`CString::into_bytes_with_nul`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes_with_nul
3748 [`CString::into_bytes`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes
3749 [`CString::into_string`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_string
3750 [`HashMap::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_capacity_and_hasher
3751 [`HashMap::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_hasher
3752 [`HashSet::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_capacity_and_hasher
3753 [`HashSet::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_hasher
3754 [`IntoStringError::into_cstring`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.into_cstring
3755 [`IntoStringError::utf8_error`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.utf8_error
3756 [`Ipv4Addr::is_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_broadcast
3757 [`Ipv4Addr::is_documentation`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_documentation
3758 [`Ipv4Addr::is_link_local`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_link_local
3759 [`Ipv4Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_loopback
3760 [`Ipv4Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_multicast
3761 [`Ipv4Addr::is_private`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_private
3762 [`Ipv6Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_loopback
3763 [`Ipv6Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_multicast
3764 [`Ipv6Addr::is_unspecified`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_unspecified
3765 [`Path::strip_prefix`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.strip_prefix
3766 [`RandomState::new`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html#method.new
3767 [`String::as_mut_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_mut_str
3768 [`String::as_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_str
3769 [`Vec::as_mut_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_mut_slice
3770 [`Vec::as_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_slice
3771 [`clone_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.clone_from_slice
3772 [`ffi::IntoStringError`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html
3773 [`i32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_neg
3774 [`i32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_rem
3775 [`i32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shl
3776 [`i32::checked_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shr
3777 [`i32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_add
3778 [`i32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_div
3779 [`i32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_mul
3780 [`i32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_neg
3781 [`i32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_rem
3782 [`i32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shl
3783 [`i32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shr
3784 [`i32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_sub
3785 [`i32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.saturating_mul
3786 [`path::StripPrefixError`]: http://doc.rust-lang.org/nightly/std/path/struct.StripPrefixError.html
3787 [`sort_by_key`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.sort_by_key
3788 [`std::collections::hash_map::RandomState`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html
3789 [`std::hash::BuildHasherDefault`]: http://doc.rust-lang.org/nightly/std/hash/struct.BuildHasherDefault.html
3790 [`std::hash::BuildHasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html
3791 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
3792 [`u32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_rem
3793 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
3794 [`u32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_shl
3795 [`u32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_add
3796 [`u32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_div
3797 [`u32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_mul
3798 [`u32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_neg
3799 [`u32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_rem
3800 [`u32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shl
3801 [`u32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shr
3802 [`u32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_sub
3803 [`u32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.saturating_mul
3806 Version 1.6.0 (2016-01-21)
3807 ==========================
3812 * The `#![no_std]` attribute causes a crate to not be linked to the
3813 standard library, but only the [core library][1.6co], as described
3814 in [RFC 1184]. The core library defines common types and traits but
3815 has no platform dependencies whatsoever, and is the basis for Rust
3816 software in environments that cannot support a full port of the
3817 standard library, such as operating systems. Most of the core
3818 library is now stable.
3824 [`Read::read_exact`],
3825 [`ErrorKind::UnexpectedEof`][] (renamed from `UnexpectedEOF`),
3826 [`fs::DirBuilder`], [`fs::DirBuilder::new`],
3827 [`fs::DirBuilder::recursive`], [`fs::DirBuilder::create`],
3828 [`os::unix::fs::DirBuilderExt`],
3829 [`os::unix::fs::DirBuilderExt::mode`], [`vec::Drain`],
3830 [`vec::Vec::drain`], [`string::Drain`], [`string::String::drain`],
3831 [`vec_deque::Drain`], [`vec_deque::VecDeque::drain`],
3832 [`collections::hash_map::Drain`],
3833 [`collections::hash_map::HashMap::drain`],
3834 [`collections::hash_set::Drain`],
3835 [`collections::hash_set::HashSet::drain`],
3836 [`collections::binary_heap::Drain`],
3837 [`collections::binary_heap::BinaryHeap::drain`],
3838 [`Vec::extend_from_slice`][] (renamed from `push_all`),
3839 [`Mutex::get_mut`], [`Mutex::into_inner`], [`RwLock::get_mut`],
3840 [`RwLock::into_inner`],
3841 [`Iterator::min_by_key`][] (renamed from `min_by`),
3842 [`Iterator::max_by_key`][] (renamed from `max_by`).
3843 * The [core library][1.6co] is stable, as are most of its APIs.
3844 * [The `assert_eq!` macro supports arguments that don't implement
3845 `Sized`][1.6ae], such as arrays. In this way it behaves more like
3847 * Several timer functions that take duration in milliseconds [are
3848 deprecated in favor of those that take `Duration`][1.6ms]. These
3849 include `Condvar::wait_timeout_ms`, `thread::sleep_ms`, and
3850 `thread::park_timeout_ms`.
3851 * The algorithm by which `Vec` reserves additional elements was
3852 [tweaked to not allocate excessive space][1.6a] while still growing
3854 * `From` conversions are [implemented from integers to floats][1.6f]
3855 in cases where the conversion is lossless. Thus they are not
3856 implemented for 32-bit ints to `f32`, nor for 64-bit ints to `f32`
3857 or `f64`. They are also not implemented for `isize` and `usize`
3858 because the implementations would be platform-specific. `From` is
3859 also implemented from `f32` to `f64`.
3860 * `From<&Path>` and `From<PathBuf>` are implemented for `Cow<Path>`.
3861 * `From<T>` is implemented for `Box<T>`, `Rc<T>` and `Arc<T>`.
3862 * `IntoIterator` is implemented for `&PathBuf` and `&Path`.
3863 * [`BinaryHeap` was refactored][1.6bh] for modest performance
3865 * Sorting slices that are already sorted [is 50% faster in some
3871 * Cargo will look in `$CARGO_HOME/bin` for subcommands [by default][1.6c].
3872 * Cargo build scripts can specify their dependencies by emitting the
3873 [`rerun-if-changed`][1.6rr] key.
3874 * crates.io will reject publication of crates with dependencies that
3875 have a wildcard version constraint. Crates with wildcard
3876 dependencies were seen to cause a variety of problems, as described
3877 in [RFC 1241]. Since 1.5 publication of such crates has emitted a
3879 * `cargo clean` [accepts a `--release` flag][1.6cc] to clean the
3880 release folder. A variety of artifacts that Cargo failed to clean
3881 are now correctly deleted.
3886 * The `unreachable_code` lint [warns when a function call's argument
3888 * The parser indicates [failures that may be caused by
3889 confusingly-similar Unicode characters][1.6uc]
3890 * Certain macro errors [are reported at definition time][1.6m], not
3896 * The compiler no longer makes use of the [`RUST_PATH`][1.6rp]
3897 environment variable when locating crates. This was a pre-cargo
3898 feature for integrating with the package manager that was
3899 accidentally never removed.
3900 * [A number of bugs were fixed in the privacy checker][1.6p] that
3901 could cause previously-accepted code to break.
3902 * [Modules and unit/tuple structs may not share the same name][1.6ts].
3903 * [Bugs in pattern matching unit structs were fixed][1.6us]. The tuple
3904 struct pattern syntax (`Foo(..)`) can no longer be used to match
3905 unit structs. This is a warning now, but will become an error in
3906 future releases. Patterns that share the same name as a const are
3908 * A bug was fixed that causes [rustc not to apply default type
3909 parameters][1.6xc] when resolving certain method implementations of
3910 traits defined in other crates.
3912 [1.6a]: https://github.com/rust-lang/rust/pull/29454
3913 [1.6ae]: https://github.com/rust-lang/rust/pull/29770
3914 [1.6bh]: https://github.com/rust-lang/rust/pull/29811
3915 [1.6c]: https://github.com/rust-lang/cargo/pull/2192
3916 [1.6cc]: https://github.com/rust-lang/cargo/pull/2131
3917 [1.6co]: http://doc.rust-lang.org/beta/core/index.html
3918 [1.6dv]: https://github.com/rust-lang/rust/pull/30000
3919 [1.6f]: https://github.com/rust-lang/rust/pull/29129
3920 [1.6m]: https://github.com/rust-lang/rust/pull/29828
3921 [1.6ms]: https://github.com/rust-lang/rust/pull/29604
3922 [1.6p]: https://github.com/rust-lang/rust/pull/29726
3923 [1.6rp]: https://github.com/rust-lang/rust/pull/30034
3924 [1.6rr]: https://github.com/rust-lang/cargo/pull/2134
3925 [1.6s]: https://github.com/rust-lang/rust/pull/29675
3926 [1.6ts]: https://github.com/rust-lang/rust/issues/21546
3927 [1.6uc]: https://github.com/rust-lang/rust/pull/29837
3928 [1.6us]: https://github.com/rust-lang/rust/pull/29383
3929 [1.6xc]: https://github.com/rust-lang/rust/issues/30123
3930 [RFC 1184]: https://github.com/rust-lang/rfcs/blob/master/text/1184-stabilize-no_std.md
3931 [RFC 1241]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
3932 [`ErrorKind::UnexpectedEof`]: http://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html#variant.UnexpectedEof
3933 [`Iterator::max_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.max_by_key
3934 [`Iterator::min_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.min_by_key
3935 [`Mutex::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.get_mut
3936 [`Mutex::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.into_inner
3937 [`Read::read_exact`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_exact
3938 [`RwLock::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.get_mut
3939 [`RwLock::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.into_inner
3940 [`Vec::extend_from_slice`]: http://doc.rust-lang.org/nightly/collections/vec/struct.Vec.html#method.extend_from_slice
3941 [`collections::binary_heap::BinaryHeap::drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.BinaryHeap.html#method.drain
3942 [`collections::binary_heap::Drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.Drain.html
3943 [`collections::hash_map::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.Drain.html
3944 [`collections::hash_map::HashMap::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.HashMap.html#method.drain
3945 [`collections::hash_set::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.Drain.html
3946 [`collections::hash_set::HashSet::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.HashSet.html#method.drain
3947 [`fs::DirBuilder::create`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.create
3948 [`fs::DirBuilder::new`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.new
3949 [`fs::DirBuilder::recursive`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.recursive
3950 [`fs::DirBuilder`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html
3951 [`os::unix::fs::DirBuilderExt::mode`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html#tymethod.mode
3952 [`os::unix::fs::DirBuilderExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html
3953 [`string::Drain`]: http://doc.rust-lang.org/nightly/std/string/struct.Drain.html
3954 [`string::String::drain`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.drain
3955 [`vec::Drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Drain.html
3956 [`vec::Vec::drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.drain
3957 [`vec_deque::Drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.Drain.html
3958 [`vec_deque::VecDeque::drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.VecDeque.html#method.drain
3961 Version 1.5.0 (2015-12-10)
3962 ==========================
3964 * ~700 changes, numerous bugfixes
3970 [`BinaryHeap::from`], [`BinaryHeap::into_sorted_vec`],
3971 [`BinaryHeap::into_vec`], [`Condvar::wait_timeout`],
3972 [`FileTypeExt::is_block_device`], [`FileTypeExt::is_char_device`],
3973 [`FileTypeExt::is_fifo`], [`FileTypeExt::is_socket`],
3974 [`FileTypeExt`], [`Formatter::alternate`], [`Formatter::fill`],
3975 [`Formatter::precision`], [`Formatter::sign_aware_zero_pad`],
3976 [`Formatter::sign_minus`], [`Formatter::sign_plus`],
3977 [`Formatter::width`], [`Iterator::cmp`], [`Iterator::eq`],
3978 [`Iterator::ge`], [`Iterator::gt`], [`Iterator::le`],
3979 [`Iterator::lt`], [`Iterator::ne`], [`Iterator::partial_cmp`],
3980 [`Path::canonicalize`], [`Path::exists`], [`Path::is_dir`],
3981 [`Path::is_file`], [`Path::metadata`], [`Path::read_dir`],
3982 [`Path::read_link`], [`Path::symlink_metadata`],
3983 [`Utf8Error::valid_up_to`], [`Vec::resize`],
3984 [`VecDeque::as_mut_slices`], [`VecDeque::as_slices`],
3985 [`VecDeque::insert`], [`VecDeque::shrink_to_fit`],
3986 [`VecDeque::swap_remove_back`], [`VecDeque::swap_remove_front`],
3987 [`slice::split_first_mut`], [`slice::split_first`],
3988 [`slice::split_last_mut`], [`slice::split_last`],
3989 [`char::from_u32_unchecked`], [`fs::canonicalize`],
3990 [`str::MatchIndices`], [`str::RMatchIndices`],
3991 [`str::match_indices`], [`str::rmatch_indices`],
3992 [`str::slice_mut_unchecked`], [`string::ParseError`].
3993 * Rust applications hosted on crates.io can be installed locally to
3994 `~/.cargo/bin` with the [`cargo install`] command. Among other
3995 things this makes it easier to augment Cargo with new subcommands:
3996 when a binary named e.g. `cargo-foo` is found in `$PATH` it can be
3997 invoked as `cargo foo`.
3998 * Crates with wildcard (`*`) dependencies will [emit warnings when
3999 published][1.5w]. In 1.6 it will no longer be possible to publish
4000 crates with wildcard dependencies.
4005 * The rules determining when a particular lifetime must outlive
4006 a particular value (known as '[dropck]') have been [modified
4007 to not rely on parametricity][1.5p].
4008 * [Implementations of `AsRef` and `AsMut` were added to `Box`, `Rc`,
4009 and `Arc`][1.5a]. Because these smart pointer types implement
4010 `Deref`, this causes breakage in cases where the interior type
4011 contains methods of the same name.
4012 * [Correct a bug in Rc/Arc][1.5c] that caused [dropck] to be unaware
4013 that they could drop their content. Soundness fix.
4014 * All method invocations are [properly checked][1.5wf1] for
4015 [well-formedness][1.5wf2]. Soundness fix.
4016 * Traits whose supertraits contain `Self` are [not object
4017 safe][1.5o]. Soundness fix.
4018 * Target specifications support a [`no_default_libraries`][1.5nd]
4019 setting that controls whether `-nodefaultlibs` is passed to the
4020 linker, and in turn the `is_like_windows` setting no longer affects
4021 the `-nodefaultlibs` flag.
4022 * `#[derive(Show)]`, long-deprecated, [has been removed][1.5ds].
4023 * The `#[inline]` and `#[repr]` attributes [can only appear
4024 in valid locations][1.5at].
4025 * Native libraries linked from the local crate are [passed to
4026 the linker before native libraries from upstream crates][1.5nl].
4027 * Two rarely-used attributes, `#[no_debug]` and
4028 `#[omit_gdb_pretty_printer_section]` [are feature gated][1.5fg].
4029 * Negation of unsigned integers, which has been a warning for
4030 several releases, [is now behind a feature gate and will
4031 generate errors][1.5nu].
4032 * The parser accidentally accepted visibility modifiers on
4033 enum variants, a bug [which has been fixed][1.5ev].
4034 * [A bug was fixed that allowed `use` statements to import unstable
4040 * When evaluating expressions at compile-time that are not
4041 compile-time constants (const-evaluating expressions in non-const
4042 contexts), incorrect code such as overlong bitshifts and arithmetic
4043 overflow will [generate a warning instead of an error][1.5ce],
4044 delaying the error until runtime. This will allow the
4045 const-evaluator to be expanded in the future backwards-compatibly.
4046 * The `improper_ctypes` lint [no longer warns about using `isize` and
4047 `usize` in FFI][1.5ict].
4052 * `Arc<T>` and `Rc<T>` are [covariant with respect to `T` instead of
4054 * `Default` is [implemented for mutable slices][1.5d].
4055 * `FromStr` is [implemented for `SockAddrV4` and `SockAddrV6`][1.5s].
4056 * There are now `From` conversions [between floating point
4057 types][1.5f] where the conversions are lossless.
4058 * There are now `From` conversions [between integer types][1.5i] where
4059 the conversions are lossless.
4060 * [`fs::Metadata` implements `Clone`][1.5fs].
4061 * The `parse` method [accepts a leading "+" when parsing
4063 * [`AsMut` is implemented for `Vec`][1.5am].
4064 * The `clone_from` implementations for `String` and `BinaryHeap` [have
4065 been optimized][1.5cf] and no longer rely on the default impl.
4066 * The `extern "Rust"`, `extern "C"`, `unsafe extern "Rust"` and
4067 `unsafe extern "C"` function types now [implement `Clone`,
4068 `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and
4069 `fmt::Debug` for up to 12 arguments][1.5fp].
4070 * [Dropping `Vec`s is much faster in unoptimized builds when the
4071 element types don't implement `Drop`][1.5dv].
4072 * A bug that caused in incorrect behavior when [combining `VecDeque`
4073 with zero-sized types][1.5vdz] was resolved.
4074 * [`PartialOrd` for slices is faster][1.5po].
4079 * [Crate metadata size was reduced by 20%][1.5md].
4080 * [Improvements to code generation reduced the size of libcore by 3.3
4081 MB and rustc's memory usage by 18MB][1.5m].
4082 * [Improvements to deref translation increased performance in
4083 unoptimized builds][1.5dr].
4084 * Various errors in trait resolution [are deduplicated to only be
4085 reported once][1.5te].
4086 * Rust has preliminary [support for rumprun kernels][1.5rr].
4087 * Rust has preliminary [support for NetBSD on amd64][1.5na].
4089 [1.5use]: https://github.com/rust-lang/rust/pull/28364
4090 [1.5po]: https://github.com/rust-lang/rust/pull/28436
4091 [1.5ev]: https://github.com/rust-lang/rust/pull/28442
4092 [1.5nu]: https://github.com/rust-lang/rust/pull/28468
4093 [1.5dr]: https://github.com/rust-lang/rust/pull/28491
4094 [1.5vdz]: https://github.com/rust-lang/rust/pull/28494
4095 [1.5md]: https://github.com/rust-lang/rust/pull/28521
4096 [1.5fg]: https://github.com/rust-lang/rust/pull/28522
4097 [1.5dv]: https://github.com/rust-lang/rust/pull/28531
4098 [1.5na]: https://github.com/rust-lang/rust/pull/28543
4099 [1.5fp]: https://github.com/rust-lang/rust/pull/28560
4100 [1.5rr]: https://github.com/rust-lang/rust/pull/28593
4101 [1.5cf]: https://github.com/rust-lang/rust/pull/28602
4102 [1.5nl]: https://github.com/rust-lang/rust/pull/28605
4103 [1.5te]: https://github.com/rust-lang/rust/pull/28645
4104 [1.5at]: https://github.com/rust-lang/rust/pull/28650
4105 [1.5am]: https://github.com/rust-lang/rust/pull/28663
4106 [1.5m]: https://github.com/rust-lang/rust/pull/28778
4107 [1.5ict]: https://github.com/rust-lang/rust/pull/28779
4108 [1.5a]: https://github.com/rust-lang/rust/pull/28811
4109 [1.5pi]: https://github.com/rust-lang/rust/pull/28826
4110 [1.5ce]: https://github.com/rust-lang/rfcs/blob/master/text/1229-compile-time-asserts.md
4111 [1.5p]: https://github.com/rust-lang/rfcs/blob/master/text/1238-nonparametric-dropck.md
4112 [1.5i]: https://github.com/rust-lang/rust/pull/28921
4113 [1.5fs]: https://github.com/rust-lang/rust/pull/29021
4114 [1.5f]: https://github.com/rust-lang/rust/pull/29129
4115 [1.5ds]: https://github.com/rust-lang/rust/pull/29148
4116 [1.5s]: https://github.com/rust-lang/rust/pull/29190
4117 [1.5d]: https://github.com/rust-lang/rust/pull/29245
4118 [1.5o]: https://github.com/rust-lang/rust/pull/29259
4119 [1.5nd]: https://github.com/rust-lang/rust/pull/28578
4120 [1.5wf2]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
4121 [1.5wf1]: https://github.com/rust-lang/rust/pull/28669
4122 [dropck]: https://doc.rust-lang.org/nightly/nomicon/dropck.html
4123 [1.5c]: https://github.com/rust-lang/rust/pull/29110
4124 [1.5w]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
4125 [`cargo install`]: https://github.com/rust-lang/rfcs/blob/master/text/1200-cargo-install.md
4126 [`BinaryHeap::from`]: http://doc.rust-lang.org/nightly/std/convert/trait.From.html#method.from
4127 [`BinaryHeap::into_sorted_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_sorted_vec
4128 [`BinaryHeap::into_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_vec
4129 [`Condvar::wait_timeout`]: http://doc.rust-lang.org/nightly/std/sync/struct.Condvar.html#method.wait_timeout
4130 [`FileTypeExt::is_block_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_block_device
4131 [`FileTypeExt::is_char_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_char_device
4132 [`FileTypeExt::is_fifo`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_fifo
4133 [`FileTypeExt::is_socket`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_socket
4134 [`FileTypeExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html
4135 [`Formatter::alternate`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.alternate
4136 [`Formatter::fill`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.fill
4137 [`Formatter::precision`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.precision
4138 [`Formatter::sign_aware_zero_pad`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_aware_zero_pad
4139 [`Formatter::sign_minus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_minus
4140 [`Formatter::sign_plus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_plus
4141 [`Formatter::width`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.width
4142 [`Iterator::cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.cmp
4143 [`Iterator::eq`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.eq
4144 [`Iterator::ge`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ge
4145 [`Iterator::gt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.gt
4146 [`Iterator::le`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.le
4147 [`Iterator::lt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.lt
4148 [`Iterator::ne`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ne
4149 [`Iterator::partial_cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.partial_cmp
4150 [`Path::canonicalize`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.canonicalize
4151 [`Path::exists`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.exists
4152 [`Path::is_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_dir
4153 [`Path::is_file`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_file
4154 [`Path::metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.metadata
4155 [`Path::read_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_dir
4156 [`Path::read_link`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_link
4157 [`Path::symlink_metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.symlink_metadata
4158 [`Utf8Error::valid_up_to`]: http://doc.rust-lang.org/nightly/core/str/struct.Utf8Error.html#method.valid_up_to
4159 [`Vec::resize`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.resize
4160 [`VecDeque::as_mut_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_mut_slices
4161 [`VecDeque::as_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_slices
4162 [`VecDeque::insert`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.insert
4163 [`VecDeque::shrink_to_fit`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.shrink_to_fit
4164 [`VecDeque::swap_remove_back`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_back
4165 [`VecDeque::swap_remove_front`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_front
4166 [`slice::split_first_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first_mut
4167 [`slice::split_first`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first
4168 [`slice::split_last_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last_mut
4169 [`slice::split_last`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last
4170 [`char::from_u32_unchecked`]: http://doc.rust-lang.org/nightly/std/char/fn.from_u32_unchecked.html
4171 [`fs::canonicalize`]: http://doc.rust-lang.org/nightly/std/fs/fn.canonicalize.html
4172 [`str::MatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.MatchIndices.html
4173 [`str::RMatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.RMatchIndices.html
4174 [`str::match_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.match_indices
4175 [`str::rmatch_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatch_indices
4176 [`str::slice_mut_unchecked`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.slice_mut_unchecked
4177 [`string::ParseError`]: http://doc.rust-lang.org/nightly/std/string/enum.ParseError.html
4179 Version 1.4.0 (2015-10-29)
4180 ==========================
4182 * ~1200 changes, numerous bugfixes
4187 * Windows builds targeting the 64-bit MSVC ABI and linker (instead of
4188 GNU) are now supported and recommended for use.
4193 * [Several changes have been made to fix type soundness and improve
4194 the behavior of associated types][sound]. See [RFC 1214]. Although
4195 we have mostly introduced these changes as warnings this release, to
4196 become errors next release, there are still some scenarios that will
4197 see immediate breakage.
4198 * [The `str::lines` and `BufRead::lines` iterators treat `\r\n` as
4199 line breaks in addition to `\n`][crlf].
4200 * [Loans of `'static` lifetime extend to the end of a function][stat].
4201 * [`str::parse` no longer introduces avoidable rounding error when
4202 parsing floating point numbers. Together with earlier changes to
4203 float formatting/output, "round trips" like f.to_string().parse()
4204 now preserve the value of f exactly. Additionally, leading plus
4205 signs are now accepted][fp3].
4211 * `use` statements that import multiple items [can now rename
4212 them][i], as in `use foo::{bar as kitten, baz as puppy}`.
4213 * [Binops work correctly on fat pointers][binfat].
4214 * `pub extern crate`, which does not behave as expected, [issues a
4215 warning][pec] until a better solution is found.
4220 * [Many APIs were stabilized][stab]: `<Box<str>>::into_string`,
4221 [`Arc::downgrade`], [`Arc::get_mut`], [`Arc::make_mut`],
4222 [`Arc::try_unwrap`], [`Box::from_raw`], [`Box::into_raw`], [`CStr::to_str`],
4223 [`CStr::to_string_lossy`], [`CString::from_raw`], [`CString::into_raw`],
4224 [`IntoRawFd::into_raw_fd`], [`IntoRawFd`],
4225 `IntoRawHandle::into_raw_handle`, `IntoRawHandle`,
4226 `IntoRawSocket::into_raw_socket`, `IntoRawSocket`, [`Rc::downgrade`],
4227 [`Rc::get_mut`], [`Rc::make_mut`], [`Rc::try_unwrap`], [`Result::expect`],
4228 [`String::into_boxed_str`], [`TcpStream::read_timeout`],
4229 [`TcpStream::set_read_timeout`], [`TcpStream::set_write_timeout`],
4230 [`TcpStream::write_timeout`], [`UdpSocket::read_timeout`],
4231 [`UdpSocket::set_read_timeout`], [`UdpSocket::set_write_timeout`],
4232 [`UdpSocket::write_timeout`], `Vec::append`, `Vec::split_off`,
4233 [`VecDeque::append`], [`VecDeque::retain`], [`VecDeque::split_off`],
4234 [`rc::Weak::upgrade`], [`rc::Weak`], [`slice::Iter::as_slice`],
4235 [`slice::IterMut::into_slice`], [`str::CharIndices::as_str`],
4236 [`str::Chars::as_str`], [`str::split_at_mut`], [`str::split_at`],
4237 [`sync::Weak::upgrade`], [`sync::Weak`], [`thread::park_timeout`],
4239 * [Some APIs were deprecated][dep]: `BTreeMap::with_b`,
4240 `BTreeSet::with_b`, `Option::as_mut_slice`, `Option::as_slice`,
4241 `Result::as_mut_slice`, `Result::as_slice`, `f32::from_str_radix`,
4242 `f64::from_str_radix`.
4243 * [Reverse-searching strings is faster with the 'two-way'
4245 * [`std::io::copy` allows `?Sized` arguments][cc].
4246 * The `Windows`, `Chunks`, and `ChunksMut` iterators over slices all
4247 [override `count`, `nth` and `last` with an O(1)
4248 implementation][it].
4249 * [`Default` is implemented for arrays up to `[T; 32]`][d].
4250 * [`IntoRawFd` has been added to the Unix-specific prelude,
4251 `IntoRawSocket` and `IntoRawHandle` to the Windows-specific
4253 * [`Extend<String>` and `FromIterator<String` are both implemented for
4255 * [`IntoIterator` is implemented for references to `Option` and
4257 * [`HashMap` and `HashSet` implement `Extend<&T>` where `T:
4258 Copy`][ext] as part of [RFC 839]. This will cause type inference
4259 breakage in rare situations.
4260 * [`BinaryHeap` implements `Debug`][bh2].
4261 * [`Borrow` and `BorrowMut` are implemented for fixed-size
4263 * [`extern fn`s with the "Rust" and "C" ABIs implement common
4264 traits including `Eq`, `Ord`, `Debug`, `Hash`][fp].
4265 * [String comparison is faster][faststr].
4266 * `&mut T` where `T: std::fmt::Write` [also implements
4267 `std::fmt::Write`][mutw].
4268 * [A stable regression in `VecDeque::push_back` and other
4269 capacity-altering methods that caused panics for zero-sized types
4271 * [Function pointers implement traits for up to 12 parameters][fp2].
4276 * The compiler [no longer uses the 'morestack' feature to prevent
4277 stack overflow][mm]. Instead it uses guard pages and stack
4278 probes (though stack probes are not yet implemented on any platform
4280 * [The compiler matches traits faster when projections are involved][p].
4281 * The 'improper_ctypes' lint [no longer warns about use of `isize` and
4283 * [Cargo now displays useful information about what its doing during
4284 `cargo update`][cu].
4286 [`Arc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.downgrade
4287 [`Arc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.make_mut
4288 [`Arc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.get_mut
4289 [`Arc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.try_unwrap
4290 [`Box::from_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.from_raw
4291 [`Box::into_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.into_raw
4292 [`CStr::to_str`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_str
4293 [`CStr::to_string_lossy`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_string_lossy
4294 [`CString::from_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.from_raw
4295 [`CString::into_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_raw
4296 [`IntoRawFd::into_raw_fd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html#tymethod.into_raw_fd
4297 [`IntoRawFd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html
4298 [`Rc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.downgrade
4299 [`Rc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.get_mut
4300 [`Rc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.make_mut
4301 [`Rc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.try_unwrap
4302 [`Result::expect`]: http://doc.rust-lang.org/nightly/core/result/enum.Result.html#method.expect
4303 [`String::into_boxed_str`]: http://doc.rust-lang.org/nightly/collections/string/struct.String.html#method.into_boxed_str
4304 [`TcpStream::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
4305 [`TcpStream::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
4306 [`TcpStream::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
4307 [`TcpStream::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
4308 [`UdpSocket::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
4309 [`UdpSocket::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
4310 [`UdpSocket::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
4311 [`UdpSocket::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
4312 [`VecDeque::append`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.append
4313 [`VecDeque::retain`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.retain
4314 [`VecDeque::split_off`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.split_off
4315 [`rc::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html#method.upgrade
4316 [`rc::Weak`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html
4317 [`slice::Iter::as_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.Iter.html#method.as_slice
4318 [`slice::IterMut::into_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.IterMut.html#method.into_slice
4319 [`str::CharIndices::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.CharIndices.html#method.as_str
4320 [`str::Chars::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.Chars.html#method.as_str
4321 [`str::split_at_mut`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at_mut
4322 [`str::split_at`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at
4323 [`sync::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html#method.upgrade
4324 [`sync::Weak`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html
4325 [`thread::park_timeout`]: http://doc.rust-lang.org/nightly/std/thread/fn.park_timeout.html
4326 [`thread::sleep`]: http://doc.rust-lang.org/nightly/std/thread/fn.sleep.html
4327 [bh2]: https://github.com/rust-lang/rust/pull/28156
4328 [binfat]: https://github.com/rust-lang/rust/pull/28270
4329 [bm]: https://github.com/rust-lang/rust/pull/28197
4330 [cc]: https://github.com/rust-lang/rust/pull/27531
4331 [crlf]: https://github.com/rust-lang/rust/pull/28034
4332 [cu]: https://github.com/rust-lang/cargo/pull/1931
4333 [d]: https://github.com/rust-lang/rust/pull/27825
4334 [dep]: https://github.com/rust-lang/rust/pull/28339
4335 [es]: https://github.com/rust-lang/rust/pull/27956
4336 [ext]: https://github.com/rust-lang/rust/pull/28094
4337 [faststr]: https://github.com/rust-lang/rust/pull/28338
4338 [ffi]: https://github.com/rust-lang/rust/pull/28779
4339 [fp]: https://github.com/rust-lang/rust/pull/28268
4340 [fp2]: https://github.com/rust-lang/rust/pull/28560
4341 [fp3]: https://github.com/rust-lang/rust/pull/27307
4342 [i]: https://github.com/rust-lang/rust/pull/27451
4343 [into2]: https://github.com/rust-lang/rust/pull/28039
4344 [it]: https://github.com/rust-lang/rust/pull/27652
4345 [mm]: https://github.com/rust-lang/rust/pull/27338
4346 [mutw]: https://github.com/rust-lang/rust/pull/28368
4347 [sound]: https://github.com/rust-lang/rust/pull/27641
4348 [p]: https://github.com/rust-lang/rust/pull/27866
4349 [pec]: https://github.com/rust-lang/rust/pull/28486
4350 [pr]: https://github.com/rust-lang/rust/pull/27896
4351 [RFC 839]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
4352 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
4353 [s]: https://github.com/rust-lang/rust/pull/27474
4354 [stab]: https://github.com/rust-lang/rust/pull/28339
4355 [stat]: https://github.com/rust-lang/rust/pull/28321
4356 [vd]: https://github.com/rust-lang/rust/pull/28494
4358 Version 1.3.0 (2015-09-17)
4359 ==============================
4361 * ~900 changes, numerous bugfixes
4366 * The [new object lifetime defaults][nold] have been [turned
4367 on][nold2] after a cycle of warnings about the change. Now types
4368 like `&'a Box<Trait>` (or `&'a Rc<Trait>`, etc) will change from
4369 being interpreted as `&'a Box<Trait+'a>` to `&'a
4370 Box<Trait+'static>`.
4371 * [The Rustonomicon][nom] is a new book in the official documentation
4372 that dives into writing unsafe Rust.
4373 * The [`Duration`] API, [has been stabilized][ds]. This basic unit of
4374 timekeeping is employed by other std APIs, as well as out-of-tree
4380 * The [new object lifetime defaults][nold] have been [turned
4381 on][nold2] after a cycle of warnings about the change.
4382 * There is a known [regression][lr] in how object lifetime elision is
4383 interpreted, the proper solution for which is undetermined.
4384 * The `#[prelude_import]` attribute, an internal implementation
4385 detail, was accidentally stabilized previously. [It has been put
4386 behind the `prelude_import` feature gate][pi]. This change is
4387 believed to break no existing code.
4388 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
4389 [more sane for dynamically sized types][dst3]. Code that relied on
4390 the previous behavior is thought to be broken.
4391 * The `dropck` rules, which checks that destructors can't access
4392 destroyed values, [have been updated][dropck] to match the
4393 [RFC][dropckrfc]. This fixes some soundness holes, and as such will
4394 cause some previously-compiling code to no longer build.
4399 * The [new object lifetime defaults][nold] have been [turned
4400 on][nold2] after a cycle of warnings about the change.
4401 * Semicolons may [now follow types and paths in
4402 macros](https://github.com/rust-lang/rust/pull/27000).
4403 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
4404 [more sane for dynamically sized types][dst3]. Code that relied on
4405 the previous behavior is not known to exist, and suspected to be
4407 * `'static` variables [may now be recursive][st].
4408 * `ref` bindings choose between [`Deref`] and [`DerefMut`]
4409 implementations correctly.
4410 * The `dropck` rules, which checks that destructors can't access
4411 destroyed values, [have been updated][dropck] to match the
4417 * The [`Duration`] API, [has been stabilized][ds], as well as the
4418 `std::time` module, which presently contains only `Duration`.
4419 * `Box<str>` and `Box<[T]>` both implement `Clone`.
4420 * The owned C string, [`CString`], implements [`Borrow`] and the
4421 borrowed C string, [`CStr`], implements [`ToOwned`]. The two of
4422 these allow C strings to be borrowed and cloned in generic code.
4423 * [`CStr`] implements [`Debug`].
4424 * [`AtomicPtr`] implements [`Debug`].
4425 * [`Error`] trait objects [can be downcast to their concrete types][e]
4426 in many common configurations, using the [`is`], [`downcast`],
4427 [`downcast_ref`] and [`downcast_mut`] methods, similarly to the
4429 * Searching for substrings now [employs the two-way algorithm][search]
4430 instead of doing a naive search. This gives major speedups to a
4431 number of methods, including [`contains`][sc], [`find`][sf],
4432 [`rfind`][srf], [`split`][ss]. [`starts_with`][ssw] and
4433 [`ends_with`][sew] are also faster.
4434 * The performance of `PartialEq` for slices is [much faster][ps].
4435 * The [`Hash`] trait offers the default method, [`hash_slice`], which
4436 is overridden and optimized by the implementations for scalars.
4437 * The [`Hasher`] trait now has a number of specialized `write_*`
4438 methods for primitive types, for efficiency.
4439 * The I/O-specific error type, [`std::io::Error`][ie], gained a set of
4440 methods for accessing the 'inner error', if any: [`get_ref`][iegr],
4441 [`get_mut`][iegm], [`into_inner`][ieii]. As well, the implementation
4442 of [`std::error::Error::cause`][iec] also delegates to the inner
4444 * [`process::Child`][pc] gained the [`id`] method, which returns a
4445 `u32` representing the platform-specific process identifier.
4446 * The [`connect`] method on slices is deprecated, replaced by the new
4447 [`join`] method (note that both of these are on the *unstable*
4448 [`SliceConcatExt`] trait, but through the magic of the prelude are
4449 available to stable code anyway).
4450 * The [`Div`] operator is implemented for [`Wrapping`] types.
4451 * [`DerefMut` is implemented for `String`][dms].
4452 * Performance of SipHash (the default hasher for `HashMap`) is
4453 [better for long data][sh].
4454 * [`AtomicPtr`] implements [`Send`].
4455 * The [`read_to_end`] implementations for [`Stdin`] and [`File`]
4456 are now [specialized to use uninitialized buffers for increased
4458 * Lifetime parameters of foreign functions [are now resolved
4464 * Rust can now, with some coercion, [produce programs that run on
4465 Windows XP][xp], though XP is not considered a supported platform.
4466 * Porting Rust on Windows from the GNU toolchain to MSVC continues
4467 ([1][win1], [2][win2], [3][win3], [4][win4]). It is still not
4468 recommended for use in 1.3, though should be fully-functional
4469 in the [64-bit 1.4 beta][b14].
4470 * On Fedora-based systems installation will [properly configure the
4471 dynamic linker][fl].
4472 * The compiler gained many new extended error descriptions, which can
4473 be accessed with the `--explain` flag.
4474 * The `dropck` pass, which checks that destructors can't access
4475 destroyed values, [has been rewritten][dropck]. This fixes some
4476 soundness holes, and as such will cause some previously-compiling
4477 code to no longer build.
4478 * `rustc` now uses [LLVM to write archive files where possible][ar].
4479 Eventually this will eliminate the compiler's dependency on the ar
4481 * Rust has [preliminary support for i686 FreeBSD][fb] (it has long
4482 supported FreeBSD on x86_64).
4483 * The [`unused_mut`][lum], [`unconditional_recursion`][lur],
4484 [`improper_ctypes`][lic], and [`negate_unsigned`][lnu] lints are
4486 * If landing pads are disabled (with `-Z no-landing-pads`), [`panic!`
4487 will kill the process instead of leaking][nlp].
4489 [`Any`]: http://doc.rust-lang.org/nightly/std/any/trait.Any.html
4490 [`AtomicPtr`]: http://doc.rust-lang.org/nightly/std/sync/atomic/struct.AtomicPtr.html
4491 [`Borrow`]: http://doc.rust-lang.org/nightly/std/borrow/trait.Borrow.html
4492 [`CStr`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html
4493 [`CString`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html
4494 [`Debug`]: http://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
4495 [`DerefMut`]: http://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
4496 [`Deref`]: http://doc.rust-lang.org/nightly/std/ops/trait.Deref.html
4497 [`Div`]: http://doc.rust-lang.org/nightly/std/ops/trait.Div.html
4498 [`Duration`]: http://doc.rust-lang.org/nightly/std/time/struct.Duration.html
4499 [`Error`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html
4500 [`File`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html
4501 [`Hash`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html
4502 [`Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
4503 [`Send`]: http://doc.rust-lang.org/nightly/std/marker/trait.Send.html
4504 [`SliceConcatExt`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html
4505 [`Stdin`]: http://doc.rust-lang.org/nightly/std/io/struct.Stdin.html
4506 [`ToOwned`]: http://doc.rust-lang.org/nightly/std/borrow/trait.ToOwned.html
4507 [`Wrapping`]: http://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
4508 [`connect`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.connect
4509 [`downcast_mut`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_mut
4510 [`downcast_ref`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_ref
4511 [`downcast`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast
4512 [`hash_slice`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
4513 [`id`]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html#method.id
4514 [`is`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.is
4515 [`join`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.join
4516 [`read_to_end`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_to_end
4517 [ar]: https://github.com/rust-lang/rust/pull/26926
4518 [b14]: https://static.rust-lang.org/dist/rust-beta-x86_64-pc-windows-msvc.msi
4519 [dms]: https://github.com/rust-lang/rust/pull/26241
4520 [dropck]: https://github.com/rust-lang/rust/pull/27261
4521 [dropckrfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
4522 [ds]: https://github.com/rust-lang/rust/pull/26818
4523 [dst1]: http://doc.rust-lang.org/nightly/std/mem/fn.size_of_val.html
4524 [dst2]: http://doc.rust-lang.org/nightly/std/mem/fn.align_of_val.html
4525 [dst3]: https://github.com/rust-lang/rust/pull/27351
4526 [e]: https://github.com/rust-lang/rust/pull/24793
4527 [f]: https://github.com/rust-lang/rust/pull/26588
4528 [fb]: https://github.com/rust-lang/rust/pull/26959
4529 [fl]: https://github.com/rust-lang/rust-installer/pull/41
4530 [hs]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
4531 [ie]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html
4532 [iec]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.cause
4533 [iegm]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_mut
4534 [iegr]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_ref
4535 [ieii]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.into_inner
4536 [lic]: https://github.com/rust-lang/rust/pull/26583
4537 [lnu]: https://github.com/rust-lang/rust/pull/27026
4538 [lr]: https://github.com/rust-lang/rust/issues/27248
4539 [lum]: https://github.com/rust-lang/rust/pull/26378
4540 [lur]: https://github.com/rust-lang/rust/pull/26783
4541 [nlp]: https://github.com/rust-lang/rust/pull/27176
4542 [nold2]: https://github.com/rust-lang/rust/pull/27045
4543 [nold]: https://github.com/rust-lang/rfcs/blob/master/text/1156-adjust-default-object-bounds.md
4544 [nom]: http://doc.rust-lang.org/nightly/nomicon/
4545 [pc]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html
4546 [pi]: https://github.com/rust-lang/rust/pull/26699
4547 [ps]: https://github.com/rust-lang/rust/pull/26884
4548 [rte]: https://github.com/rust-lang/rust/pull/26950
4549 [sc]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.contains
4550 [search]: https://github.com/rust-lang/rust/pull/26327
4551 [sew]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.ends_with
4552 [sf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.find
4553 [sh]: https://github.com/rust-lang/rust/pull/27280
4554 [srf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rfind
4555 [ss]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split
4556 [ssw]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.starts_with
4557 [st]: https://github.com/rust-lang/rust/pull/26630
4558 [win1]: https://github.com/rust-lang/rust/pull/26569
4559 [win2]: https://github.com/rust-lang/rust/pull/26741
4560 [win3]: https://github.com/rust-lang/rust/pull/26741
4561 [win4]: https://github.com/rust-lang/rust/pull/27210
4562 [xp]: https://github.com/rust-lang/rust/pull/26569
4564 Version 1.2.0 (2015-08-07)
4565 ==========================
4567 * ~1200 changes, numerous bugfixes
4572 * [Dynamically-sized-type coercions][dst] allow smart pointer types
4573 like `Rc` to contain types without a fixed size, arrays and trait
4574 objects, finally enabling use of `Rc<[T]>` and completing the
4575 implementation of DST.
4576 * [Parallel codegen][parcodegen] is now working again, which can
4577 substantially speed up large builds in debug mode; It also gets
4578 another ~33% speedup when bootstrapping on a 4 core machine (using 8
4579 jobs). It's not enabled by default, but will be "in the near
4580 future". It can be activated with the `-C codegen-units=N` flag to
4582 * This is the first release with [experimental support for linking
4583 with the MSVC linker and lib C on Windows (instead of using the GNU
4584 variants via MinGW)][win]. It is yet recommended only for the most
4585 intrepid Rustaceans.
4586 * Benchmark compilations are showing a 30% improvement in
4587 bootstrapping over 1.1.
4592 * The [`to_uppercase`] and [`to_lowercase`] methods on `char` now do
4593 unicode case mapping, which is a previously-planned change in
4594 behavior and considered a bugfix.
4595 * [`mem::align_of`] now specifies [the *minimum alignment* for
4596 T][align], which is usually the alignment programs are interested
4597 in, and the same value reported by clang's
4598 `alignof`. [`mem::min_align_of`] is deprecated. This is not known to
4600 * [The `#[packed]` attribute is no longer silently accepted by the
4601 compiler][packed]. This attribute did nothing and code that
4602 mentioned it likely did not work as intended.
4603 * Associated type defaults are [now behind the
4604 `associated_type_defaults` feature gate][ad]. In 1.1 associated type
4605 defaults *did not work*, but could be mentioned syntactically. As
4606 such this breakage has minimal impact.
4611 * Patterns with `ref mut` now correctly invoke [`DerefMut`] when
4612 matching against dereferencable values.
4617 * The [`Extend`] trait, which grows a collection from an iterator, is
4618 implemented over iterators of references, for `String`, `Vec`,
4619 `LinkedList`, `VecDeque`, `EnumSet`, `BinaryHeap`, `VecMap`,
4620 `BTreeSet` and `BTreeMap`. [RFC][extend-rfc].
4621 * The [`iter::once`] function returns an iterator that yields a single
4622 element, and [`iter::empty`] returns an iterator that yields no
4624 * The [`matches`] and [`rmatches`] methods on `str` return iterators
4625 over substring matches.
4626 * [`Cell`] and [`RefCell`] both implement `Eq`.
4627 * A number of methods for wrapping arithmetic are added to the
4628 integral types, [`wrapping_div`], [`wrapping_rem`],
4629 [`wrapping_neg`], [`wrapping_shl`], [`wrapping_shr`]. These are in
4630 addition to the existing [`wrapping_add`], [`wrapping_sub`], and
4631 [`wrapping_mul`] methods, and alternatives to the [`Wrapping`]
4632 type.. It is illegal for the default arithmetic operations in Rust
4633 to overflow; the desire to wrap must be explicit.
4634 * The `{:#?}` formatting specifier [displays the alternate,
4635 pretty-printed][debugfmt] form of the `Debug` formatter. This
4636 feature was actually introduced prior to 1.0 with little
4638 * [`fmt::Formatter`] implements [`fmt::Write`], a `fmt`-specific trait
4639 for writing data to formatted strings, similar to [`io::Write`].
4640 * [`fmt::Formatter`] adds 'debug builder' methods, [`debug_struct`],
4641 [`debug_tuple`], [`debug_list`], [`debug_set`], [`debug_map`]. These
4642 are used by code generators to emit implementations of [`Debug`].
4643 * `str` has new [`to_uppercase`][strup] and [`to_lowercase`][strlow]
4644 methods that convert case, following Unicode case mapping.
4645 * It is now easier to handle poisoned locks. The [`PoisonError`]
4646 type, returned by failing lock operations, exposes `into_inner`,
4647 `get_ref`, and `get_mut`, which all give access to the inner lock
4648 guard, and allow the poisoned lock to continue to operate. The
4649 `is_poisoned` method of [`RwLock`] and [`Mutex`] can poll for a
4650 poisoned lock without attempting to take the lock.
4651 * On Unix the [`FromRawFd`] trait is implemented for [`Stdio`], and
4652 [`AsRawFd`] for [`ChildStdin`], [`ChildStdout`], [`ChildStderr`].
4653 On Windows the `FromRawHandle` trait is implemented for `Stdio`,
4654 and `AsRawHandle` for `ChildStdin`, `ChildStdout`,
4656 * [`io::ErrorKind`] has a new variant, `InvalidData`, which indicates
4662 * `rustc` employs smarter heuristics for guessing at [typos].
4663 * `rustc` emits more efficient code for [no-op conversions between
4664 unsafe pointers][nop].
4665 * Fat pointers are now [passed in pairs of immediate arguments][fat],
4666 resulting in faster compile times and smaller code.
4668 [`Extend`]: https://doc.rust-lang.org/nightly/std/iter/trait.Extend.html
4669 [extend-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
4670 [`iter::once`]: https://doc.rust-lang.org/nightly/std/iter/fn.once.html
4671 [`iter::empty`]: https://doc.rust-lang.org/nightly/std/iter/fn.empty.html
4672 [`matches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.matches
4673 [`rmatches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatches
4674 [`Cell`]: https://doc.rust-lang.org/nightly/std/cell/struct.Cell.html
4675 [`RefCell`]: https://doc.rust-lang.org/nightly/std/cell/struct.RefCell.html
4676 [`wrapping_add`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_add
4677 [`wrapping_sub`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_sub
4678 [`wrapping_mul`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_mul
4679 [`wrapping_div`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_div
4680 [`wrapping_rem`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_rem
4681 [`wrapping_neg`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_neg
4682 [`wrapping_shl`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shl
4683 [`wrapping_shr`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shr
4684 [`Wrapping`]: https://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
4685 [`fmt::Formatter`]: https://doc.rust-lang.org/nightly/std/fmt/struct.Formatter.html
4686 [`fmt::Write`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Write.html
4687 [`io::Write`]: https://doc.rust-lang.org/nightly/std/io/trait.Write.html
4688 [`debug_struct`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_struct
4689 [`debug_tuple`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_tuple
4690 [`debug_list`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_list
4691 [`debug_set`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_set
4692 [`debug_map`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_map
4693 [`Debug`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
4694 [strup]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_uppercase
4695 [strlow]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_lowercase
4696 [`to_uppercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_uppercase
4697 [`to_lowercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_lowercase
4698 [`PoisonError`]: https://doc.rust-lang.org/nightly/std/sync/struct.PoisonError.html
4699 [`RwLock`]: https://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html
4700 [`Mutex`]: https://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html
4701 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
4702 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
4703 [`Stdio`]: https://doc.rust-lang.org/nightly/std/process/struct.Stdio.html
4704 [`ChildStdin`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdin.html
4705 [`ChildStdout`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdout.html
4706 [`ChildStderr`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStderr.html
4707 [`io::ErrorKind`]: https://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html
4708 [debugfmt]: https://www.reddit.com/r/rust/comments/3ceaui/psa_produces_prettyprinted_debug_output/
4709 [`DerefMut`]: https://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
4710 [`mem::align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.align_of.html
4711 [align]: https://github.com/rust-lang/rust/pull/25646
4712 [`mem::min_align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.min_align_of.html
4713 [typos]: https://github.com/rust-lang/rust/pull/26087
4714 [nop]: https://github.com/rust-lang/rust/pull/26336
4715 [fat]: https://github.com/rust-lang/rust/pull/26411
4716 [dst]: https://github.com/rust-lang/rfcs/blob/master/text/0982-dst-coercion.md
4717 [parcodegen]: https://github.com/rust-lang/rust/pull/26018
4718 [packed]: https://github.com/rust-lang/rust/pull/25541
4719 [ad]: https://github.com/rust-lang/rust/pull/27382
4720 [win]: https://github.com/rust-lang/rust/pull/25350
4722 Version 1.1.0 (2015-06-25)
4723 =========================
4725 * ~850 changes, numerous bugfixes
4730 * The [`std::fs` module has been expanded][fs] to expand the set of
4731 functionality exposed:
4732 * `DirEntry` now supports optimizations like `file_type` and `metadata` which
4733 don't incur a syscall on some platforms.
4734 * A `symlink_metadata` function has been added.
4735 * The `fs::Metadata` structure now lowers to its OS counterpart, providing
4736 access to all underlying information.
4737 * The compiler now contains extended explanations of many errors. When an error
4738 with an explanation occurs the compiler suggests using the `--explain` flag
4739 to read the explanation. Error explanations are also [available online][err-index].
4740 * Thanks to multiple [improvements][sk] to [type checking][pre], as
4741 well as other work, the time to bootstrap the compiler decreased by
4747 * The [`str::split_whitespace`] method splits a string on unicode
4748 whitespace boundaries.
4749 * On both Windows and Unix, new extension traits provide conversion of
4750 I/O types to and from the underlying system handles. On Unix, these
4751 traits are [`FromRawFd`] and [`AsRawFd`], on Windows `FromRawHandle`
4752 and `AsRawHandle`. These are implemented for `File`, `TcpStream`,
4753 `TcpListener`, and `UpdSocket`. Further implementations for
4754 `std::process` will be stabilized later.
4755 * On Unix, [`std::os::unix::symlink`] creates symlinks. On
4756 Windows, symlinks can be created with
4757 `std::os::windows::symlink_dir` and
4758 `std::os::windows::symlink_file`.
4759 * The `mpsc::Receiver` type can now be converted into an iterator with
4760 `into_iter` on the [`IntoIterator`] trait.
4761 * `Ipv4Addr` can be created from `u32` with the `From<u32>`
4762 implementation of the [`From`] trait.
4763 * The `Debug` implementation for `RangeFull` [creates output that is
4764 more consistent with other implementations][rf].
4765 * [`Debug` is implemented for `File`][file].
4766 * The `Default` implementation for `Arc` [no longer requires `Sync +
4768 * [The `Iterator` methods `count`, `nth`, and `last` have been
4769 overridden for slices to have O(1) performance instead of O(n)][si].
4770 * Incorrect handling of paths on Windows has been improved in both the
4771 compiler and the standard library.
4772 * [`AtomicPtr` gained a `Default` implementation][ap].
4773 * In accordance with Rust's policy on arithmetic overflow `abs` now
4774 [panics on overflow when debug assertions are enabled][abs].
4775 * The [`Cloned`] iterator, which was accidentally left unstable for
4776 1.0 [has been stabilized][c].
4777 * The [`Incoming`] iterator, which iterates over incoming TCP
4778 connections, and which was accidentally unnamable in 1.0, [is now
4779 properly exported][inc].
4780 * [`BinaryHeap`] no longer corrupts itself [when functions called by
4781 `sift_up` or `sift_down` panic][bh].
4782 * The [`split_off`] method of `LinkedList` [no longer corrupts
4783 the list in certain scenarios][ll].
4788 * Type checking performance [has improved notably][sk] with
4789 [multiple improvements][pre].
4790 * The compiler [suggests code changes][ch] for more errors.
4791 * rustc and it's build system have experimental support for [building
4792 toolchains against MUSL][m] instead of glibc on Linux.
4793 * The compiler defines the `target_env` cfg value, which is used for
4794 distinguishing toolchains that are otherwise for the same
4795 platform. Presently this is set to `gnu` for common GNU Linux
4796 targets and for MinGW targets, and `musl` for MUSL Linux targets.
4797 * The [`cargo rustc`][crc] command invokes a build with custom flags
4799 * [Android executables are always position independent][pie].
4800 * [The `drop_with_repr_extern` lint warns about mixing `repr(C)`
4803 [`str::split_whitespace`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_whitespace
4804 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
4805 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
4806 [`std::os::unix::symlink`]: https://doc.rust-lang.org/nightly/std/os/unix/fs/fn.symlink.html
4807 [`IntoIterator`]: https://doc.rust-lang.org/nightly/std/iter/trait.IntoIterator.html
4808 [`From`]: https://doc.rust-lang.org/nightly/std/convert/trait.From.html
4809 [rf]: https://github.com/rust-lang/rust/pull/24491
4810 [err-index]: https://doc.rust-lang.org/error-index.html
4811 [sk]: https://github.com/rust-lang/rust/pull/24615
4812 [pre]: https://github.com/rust-lang/rust/pull/25323
4813 [file]: https://github.com/rust-lang/rust/pull/24598
4814 [ch]: https://github.com/rust-lang/rust/pull/24683
4815 [arc]: https://github.com/rust-lang/rust/pull/24695
4816 [si]: https://github.com/rust-lang/rust/pull/24701
4817 [ap]: https://github.com/rust-lang/rust/pull/24834
4818 [m]: https://github.com/rust-lang/rust/pull/24777
4819 [fs]: https://github.com/rust-lang/rfcs/blob/master/text/1044-io-fs-2.1.md
4820 [crc]: https://github.com/rust-lang/cargo/pull/1568
4821 [pie]: https://github.com/rust-lang/rust/pull/24953
4822 [abs]: https://github.com/rust-lang/rust/pull/25441
4823 [c]: https://github.com/rust-lang/rust/pull/25496
4824 [`Cloned`]: https://doc.rust-lang.org/nightly/std/iter/struct.Cloned.html
4825 [`Incoming`]: https://doc.rust-lang.org/nightly/std/net/struct.Incoming.html
4826 [inc]: https://github.com/rust-lang/rust/pull/25522
4827 [bh]: https://github.com/rust-lang/rust/pull/25856
4828 [`BinaryHeap`]: https://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html
4829 [ll]: https://github.com/rust-lang/rust/pull/26022
4830 [`split_off`]: https://doc.rust-lang.org/nightly/collections/linked_list/struct.LinkedList.html#method.split_off
4831 [drop]: https://github.com/rust-lang/rust/pull/24935
4833 Version 1.0.0 (2015-05-15)
4834 ========================
4836 * ~1500 changes, numerous bugfixes
4841 * The vast majority of the standard library is now `#[stable]`. It is
4842 no longer possible to use unstable features with a stable build of
4844 * Many popular crates on [crates.io] now work on the stable release
4846 * Arithmetic on basic integer types now [checks for overflow in debug
4852 * Several [restrictions have been added to trait coherence][coh] in
4853 order to make it easier for upstream authors to change traits
4854 without breaking downstream code.
4855 * Digits of binary and octal literals are [lexed more eagerly][lex] to
4856 improve error messages and macro behavior. For example, `0b1234` is
4857 now lexed as `0b1234` instead of two tokens, `0b1` and `234`.
4858 * Trait bounds [are always invariant][inv], eliminating the need for
4859 the `PhantomFn` and `MarkerTrait` lang items, which have been
4861 * ["-" is no longer a valid character in crate names][cr], the `extern crate
4862 "foo" as bar` syntax has been replaced with `extern crate foo as
4863 bar`, and Cargo now automatically translates "-" in *package* names
4864 to underscore for the crate name.
4865 * [Lifetime shadowing is an error][lt].
4866 * [`Send` no longer implies `'static`][send-rfc].
4867 * [UFCS now supports trait-less associated paths][moar-ufcs] like
4868 `MyType::default()`.
4869 * Primitive types [now have inherent methods][prim-inherent],
4870 obviating the need for extension traits like `SliceExt`.
4871 * Methods with `Self: Sized` in their `where` clause are [considered
4872 object-safe][self-sized], allowing many extension traits like
4873 `IteratorExt` to be merged into the traits they extended.
4874 * You can now [refer to associated types][assoc-where] whose
4875 corresponding trait bounds appear only in a `where` clause.
4876 * The final bits of [OIBIT landed][oibit-final], meaning that traits
4877 like `Send` and `Sync` are now library-defined.
4878 * A [Reflect trait][reflect] was introduced, which means that
4879 downcasting via the `Any` trait is effectively limited to concrete
4880 types. This helps retain the potentially-important "parametricity"
4881 property: generic code cannot behave differently for different type
4882 arguments except in minor ways.
4883 * The `unsafe_destructor` feature is now deprecated in favor of the
4884 [new `dropck`][dropck]. This change is a major reduction in unsafe
4890 * The `thread_local` module [has been renamed to `std::thread`][th].
4891 * The methods of `IteratorExt` [have been moved to the `Iterator`
4893 * Several traits that implement Rust's conventions for type
4894 conversions, `AsMut`, `AsRef`, `From`, and `Into` have been
4895 [centralized in the `std::convert` module][con].
4896 * The `FromError` trait [was removed in favor of `From`][fe].
4897 * The basic sleep function [has moved to
4898 `std::thread::sleep_ms`][slp].
4899 * The `splitn` function now takes an `n` parameter that represents the
4900 number of items yielded by the returned iterator [instead of the
4901 number of 'splits'][spl].
4902 * [On Unix, all file descriptors are `CLOEXEC` by default][clo].
4903 * [Derived implementations of `PartialOrd` now order enums according
4904 to their explicitly-assigned discriminants][po].
4905 * [Methods for searching strings are generic over `Pattern`s][pat],
4906 implemented presently by `&char`, `&str`, `FnMut(char) -> bool` and
4908 * [In method resolution, object methods are resolved before inherent
4910 * [`String::from_str` has been deprecated in favor of the `From` impl,
4911 `String::from`][sf].
4912 * [`io::Error` implements `Sync`][ios].
4913 * [The `words` method on `&str` has been replaced with
4914 `split_whitespace`][sw], to avoid answering the tricky question, 'what is
4916 * The new path and IO modules are complete and `#[stable]`. This
4917 was the major library focus for this cycle.
4918 * The path API was [revised][path-normalize] to normalize `.`,
4919 adjusting the tradeoffs in favor of the most common usage.
4920 * A large number of remaining APIs in `std` were also stabilized
4921 during this cycle; about 75% of the non-deprecated API surface
4923 * The new [string pattern API][string-pattern] landed, which makes
4924 the string slice API much more internally consistent and flexible.
4925 * A new set of [generic conversion traits][conversion] replaced
4926 many existing ad hoc traits.
4927 * Generic numeric traits were [completely removed][num-traits]. This
4928 was made possible thanks to inherent methods for primitive types,
4929 and the removal gives maximal flexibility for designing a numeric
4930 hierarchy in the future.
4931 * The `Fn` traits are now related via [inheritance][fn-inherit]
4932 and provide ergonomic [blanket implementations][fn-blanket].
4933 * The `Index` and `IndexMut` traits were changed to
4934 [take the index by value][index-value], enabling code like
4935 `hash_map["string"]` to work.
4936 * `Copy` now [inherits][copy-clone] from `Clone`, meaning that all
4937 `Copy` data is known to be `Clone` as well.
4942 * Many errors now have extended explanations that can be accessed with
4943 the `--explain` flag to `rustc`.
4944 * Many new examples have been added to the standard library
4946 * rustdoc has received a number of improvements focused on completion
4948 * Metadata was tuned, shrinking binaries [by 27%][metadata-shrink].
4949 * Much headway was made on ecosystem-wide CI, making it possible
4950 to [compare builds for breakage][ci-compare].
4953 [crates.io]: http://crates.io
4954 [clo]: https://github.com/rust-lang/rust/pull/24034
4955 [coh]: https://github.com/rust-lang/rfcs/blob/master/text/1023-rebalancing-coherence.md
4956 [con]: https://github.com/rust-lang/rust/pull/23875
4957 [cr]: https://github.com/rust-lang/rust/pull/23419
4958 [fe]: https://github.com/rust-lang/rust/pull/23879
4959 [ie]: https://github.com/rust-lang/rust/pull/23300
4960 [inv]: https://github.com/rust-lang/rust/pull/23938
4961 [ios]: https://github.com/rust-lang/rust/pull/24133
4962 [lex]: https://github.com/rust-lang/rfcs/blob/master/text/0879-small-base-lexing.md
4963 [lt]: https://github.com/rust-lang/rust/pull/24057
4964 [meth]: https://github.com/rust-lang/rust/pull/24056
4965 [pat]: https://github.com/rust-lang/rfcs/blob/master/text/0528-string-patterns.md
4966 [po]: https://github.com/rust-lang/rust/pull/24270
4967 [sf]: https://github.com/rust-lang/rust/pull/24517
4968 [slp]: https://github.com/rust-lang/rust/pull/23949
4969 [spl]: https://github.com/rust-lang/rfcs/blob/master/text/0979-align-splitn-with-other-languages.md
4970 [sw]: https://github.com/rust-lang/rfcs/blob/master/text/1054-str-words.md
4971 [th]: https://github.com/rust-lang/rfcs/blob/master/text/0909-move-thread-local-to-std-thread.md
4972 [send-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0458-send-improvements.md
4973 [moar-ufcs]: https://github.com/rust-lang/rust/pull/22172
4974 [prim-inherent]: https://github.com/rust-lang/rust/pull/23104
4975 [overflow]: https://github.com/rust-lang/rfcs/blob/master/text/0560-integer-overflow.md
4976 [metadata-shrink]: https://github.com/rust-lang/rust/pull/22971
4977 [self-sized]: https://github.com/rust-lang/rust/pull/22301
4978 [assoc-where]: https://github.com/rust-lang/rust/pull/22512
4979 [string-pattern]: https://github.com/rust-lang/rust/pull/22466
4980 [oibit-final]: https://github.com/rust-lang/rust/pull/21689
4981 [reflect]: https://github.com/rust-lang/rust/pull/23712
4982 [conversion]: https://github.com/rust-lang/rfcs/pull/529
4983 [num-traits]: https://github.com/rust-lang/rust/pull/23549
4984 [index-value]: https://github.com/rust-lang/rust/pull/23601
4985 [dropck]: https://github.com/rust-lang/rfcs/pull/769
4986 [ci-compare]: https://gist.github.com/brson/a30a77836fbec057cbee
4987 [fn-inherit]: https://github.com/rust-lang/rust/pull/23282
4988 [fn-blanket]: https://github.com/rust-lang/rust/pull/23895
4989 [copy-clone]: https://github.com/rust-lang/rust/pull/23860
4990 [path-normalize]: https://github.com/rust-lang/rust/pull/23229
4993 Version 1.0.0-alpha.2 (2015-02-20)
4994 =====================================
4996 * ~1300 changes, numerous bugfixes
5000 * The various I/O modules were [overhauled][io-rfc] to reduce
5001 unnecessary abstractions and provide better interoperation with
5002 the underlying platform. The old `io` module remains temporarily
5004 * The standard library now [participates in feature gating][feat],
5005 so use of unstable libraries now requires a `#![feature(...)]`
5006 attribute. The impact of this change is [described on the
5007 forum][feat-forum]. [RFC][feat-rfc].
5011 * `for` loops [now operate on the `IntoIterator` trait][into],
5012 which eliminates the need to call `.iter()`, etc. to iterate
5013 over collections. There are some new subtleties to remember
5014 though regarding what sort of iterators various types yield, in
5015 particular that `for foo in bar { }` yields values from a move
5016 iterator, destroying the original collection. [RFC][into-rfc].
5017 * Objects now have [default lifetime bounds][obj], so you don't
5018 have to write `Box<Trait+'static>` when you don't care about
5019 storing references. [RFC][obj-rfc].
5020 * In types that implement `Drop`, [lifetimes must outlive the
5021 value][drop]. This will soon make it possible to safely
5022 implement `Drop` for types where `#[unsafe_destructor]` is now
5023 required. Read the [gorgeous RFC][drop-rfc] for details.
5024 * The fully qualified <T as Trait>::X syntax lets you set the Self
5025 type for a trait method or associated type. [RFC][ufcs-rfc].
5026 * References to types that implement `Deref<U>` now [automatically
5027 coerce to references][deref] to the dereferenced type `U`,
5028 e.g. `&T where T: Deref<U>` automatically coerces to `&U`. This
5029 should eliminate many unsightly uses of `&*`, as when converting
5030 from references to vectors into references to
5031 slices. [RFC][deref-rfc].
5032 * The explicit [closure kind syntax][close] (`|&:|`, `|&mut:|`,
5033 `|:|`) is obsolete and closure kind is inferred from context.
5034 * [`Self` is a keyword][Self].
5038 * The `Show` and `String` formatting traits [have been
5039 renamed][fmt] to `Debug` and `Display` to more clearly reflect
5040 their related purposes. Automatically getting a string
5041 conversion to use with `format!("{:?}", something_to_debug)` is
5042 now written `#[derive(Debug)]`.
5043 * Abstract [OS-specific string types][osstr], `std::ff::{OsString,
5044 OsStr}`, provide strings in platform-specific encodings for easier
5045 interop with system APIs. [RFC][osstr-rfc].
5046 * The `boxed::into_raw` and `Box::from_raw` functions [convert
5047 between `Box<T>` and `*mut T`][boxraw], a common pattern for
5048 creating raw pointers.
5052 * Certain long error messages of the form 'expected foo found bar'
5053 are now [split neatly across multiple
5054 lines][multiline]. Examples in the PR.
5055 * On Unix Rust can be [uninstalled][un] by running
5056 `/usr/local/lib/rustlib/uninstall.sh`.
5057 * The `#[rustc_on_unimplemented]` attribute, requiring the
5058 'on_unimplemented' feature, lets rustc [display custom error
5059 messages when a trait is expected to be implemented for a type
5064 * Rust is tested against a [LALR grammar][lalr], which parses
5065 almost all the Rust files that rustc does.
5067 [boxraw]: https://github.com/rust-lang/rust/pull/21318
5068 [close]: https://github.com/rust-lang/rust/pull/21843
5069 [deref]: https://github.com/rust-lang/rust/pull/21351
5070 [deref-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0241-deref-conversions.md
5071 [drop]: https://github.com/rust-lang/rust/pull/21972
5072 [drop-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
5073 [feat]: https://github.com/rust-lang/rust/pull/21248
5074 [feat-forum]: https://users.rust-lang.org/t/psa-important-info-about-rustcs-new-feature-staging/82/5
5075 [feat-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0507-release-channels.md
5076 [fmt]: https://github.com/rust-lang/rust/pull/21457
5077 [into]: https://github.com/rust-lang/rust/pull/20790
5078 [into-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md#intoiterator-and-iterable
5079 [io-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
5080 [lalr]: https://github.com/rust-lang/rust/pull/21452
5081 [multiline]: https://github.com/rust-lang/rust/pull/19870
5082 [obj]: https://github.com/rust-lang/rust/pull/22230
5083 [obj-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0599-default-object-bound.md
5084 [onun]: https://github.com/rust-lang/rust/pull/20889
5085 [osstr]: https://github.com/rust-lang/rust/pull/21488
5086 [osstr-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
5087 [Self]: https://github.com/rust-lang/rust/pull/22158
5088 [ufcs-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0132-ufcs.md
5089 [un]: https://github.com/rust-lang/rust/pull/22256
5092 Version 1.0.0-alpha (2015-01-09)
5093 ==================================
5095 * ~2400 changes, numerous bugfixes
5099 * The language itself is considered feature complete for 1.0,
5100 though there will be many usability improvements and bugfixes
5101 before the final release.
5102 * Nearly 50% of the public API surface of the standard library has
5103 been declared 'stable'. Those interfaces are unlikely to change
5105 * The long-running debate over integer types has been
5106 [settled][ints]: Rust will ship with types named `isize` and
5107 `usize`, rather than `int` and `uint`, for pointer-sized
5108 integers. Guidelines will be rolled out during the alpha cycle.
5109 * Most crates that are not `std` have been moved out of the Rust
5110 distribution into the Cargo ecosystem so they can evolve
5111 separately and don't need to be stabilized as quickly, including
5112 'time', 'getopts', 'num', 'regex', and 'term'.
5113 * Documentation continues to be expanded with more API coverage, more
5114 examples, and more in-depth explanations. The guides have been
5115 consolidated into [The Rust Programming Language][trpl].
5116 * "[Rust By Example][rbe]" is now maintained by the Rust team.
5117 * All official Rust binary installers now come with [Cargo], the
5118 Rust package manager.
5122 * Closures have been [completely redesigned][unboxed] to be
5123 implemented in terms of traits, can now be used as generic type
5124 bounds and thus monomorphized and inlined, or via an opaque
5125 pointer (boxed) as in the old system. The new system is often
5126 referred to as 'unboxed' closures.
5127 * Traits now support [associated types][assoc], allowing families
5128 of related types to be defined together and used generically in
5130 * Enum variants are [namespaced by their type names][enum].
5131 * [`where` clauses][where] provide a more versatile and attractive
5132 syntax for specifying generic bounds, though the previous syntax
5134 * Rust again picks a [fallback][fb] (either i32 or f64) for uninferred
5136 * Rust [no longer has a runtime][rt] of any description, and only
5137 supports OS threads, not green threads.
5138 * At long last, Rust has been overhauled for 'dynamically-sized
5139 types' ([DST]), which integrates 'fat pointers' (object types,
5140 arrays, and `str`) more deeply into the type system, making it
5142 * Rust now has a general [range syntax][range], `i..j`, `i..`, and
5143 `..j` that produce range types and which, when combined with the
5144 `Index` operator and multidispatch, leads to a convenient slice
5146 * The new range syntax revealed an ambiguity in the fixed-length
5147 array syntax, so now fixed length arrays [are written `[T;
5149 * The `Copy` trait is no longer implemented automatically. Unsafe
5150 pointers no longer implement `Sync` and `Send` so types
5151 containing them don't automatically either. `Sync` and `Send`
5152 are now 'unsafe traits' so one can "forcibly" implement them via
5153 `unsafe impl` if a type confirms to the requirements for them
5154 even though the internals do not (e.g. structs containing unsafe
5155 pointers like `Arc`). These changes are intended to prevent some
5156 footguns and are collectively known as [opt-in built-in
5157 traits][oibit] (though `Sync` and `Send` will soon become pure
5158 library types unknown to the compiler).
5159 * Operator traits now take their operands [by value][ops], and
5160 comparison traits can use multidispatch to compare one type
5161 against multiple other types, allowing e.g. `String` to be
5162 compared with `&str`.
5163 * `if let` and `while let` are no longer feature-gated.
5164 * Rust has adopted a more [uniform syntax for escaping unicode
5165 characters][unicode].
5166 * `macro_rules!` [has been declared stable][mac]. Though it is a
5167 flawed system it is sufficiently popular that it must be usable
5168 for 1.0. Effort has gone into [future-proofing][mac-future] it
5169 in ways that will allow other macro systems to be developed in
5170 parallel, and won't otherwise impact the evolution of the
5172 * The prelude has been [pared back significantly][prelude] such
5173 that it is the minimum necessary to support the most pervasive
5174 code patterns, and through [generalized where clauses][where]
5175 many of the prelude extension traits have been consolidated.
5176 * Rust's rudimentary reflection [has been removed][refl], as it
5177 incurred too much code generation for little benefit.
5178 * [Struct variants][structvars] are no longer feature-gated.
5179 * Trait bounds can be [polymorphic over lifetimes][hrtb]. Also
5180 known as 'higher-ranked trait bounds', this crucially allows
5181 unboxed closures to work.
5182 * Macros invocations surrounded by parens or square brackets and
5183 not terminated by a semicolon are [parsed as
5184 expressions][macros], which makes expressions like `vec![1i32,
5185 2, 3].len()` work as expected.
5186 * Trait objects now implement their traits automatically, and
5187 traits that can be coerced to objects now must be [object
5189 * Automatically deriving traits is now done with `#[derive(...)]`
5190 not `#[deriving(...)]` for [consistency with other naming
5191 conventions][derive].
5192 * Importing the containing module or enum at the same time as
5193 items or variants they contain is [now done with `self` instead
5194 of `mod`][self], as in use `foo::{self, bar}`
5195 * Glob imports are no longer feature-gated.
5196 * The `box` operator and `box` patterns have been feature-gated
5197 pending a redesign. For now unique boxes should be allocated
5198 like other containers, with `Box::new`.
5202 * A [series][coll1] of [efforts][coll2] to establish
5203 [conventions][coll3] for collections types has resulted in API
5204 improvements throughout the standard library.
5205 * New [APIs for error handling][err] provide ergonomic interop
5206 between error types, and [new conventions][err-conv] describe
5207 more clearly the recommended error handling strategies in Rust.
5208 * The `fail!` macro has been renamed to [`panic!`][panic] so that
5209 it is easier to discuss failure in the context of error handling
5210 without making clarifications as to whether you are referring to
5211 the 'fail' macro or failure more generally.
5212 * On Linux, `OsRng` prefers the new, more reliable `getrandom`
5213 syscall when available.
5214 * The 'serialize' crate has been renamed 'rustc-serialize' and
5215 moved out of the distribution to Cargo. Although it is widely
5216 used now, it is expected to be superseded in the near future.
5217 * The `Show` formatter, typically implemented with
5218 `#[derive(Show)]` is [now requested with the `{:?}`
5219 specifier][show] and is intended for use by all types, for uses
5220 such as `println!` debugging. The new `String` formatter must be
5221 implemented by hand, uses the `{}` specifier, and is intended
5222 for full-fidelity conversions of things that can logically be
5223 represented as strings.
5227 * [Flexible target specification][flex] allows rustc's code
5228 generation to be configured to support otherwise-unsupported
5230 * Rust comes with rust-gdb and rust-lldb scripts that launch their
5231 respective debuggers with Rust-appropriate pretty-printing.
5232 * The Windows installation of Rust is distributed with the
5233 MinGW components currently required to link binaries on that
5238 * Nullable enum optimizations have been extended to more types so
5239 that e.g. `Option<Vec<T>>` and `Option<String>` take up no more
5240 space than the inner types themselves.
5241 * Work has begun on supporting AArch64.
5243 [Cargo]: https://crates.io
5244 [unboxed]: http://smallcultfollowing.com/babysteps/blog/2014/11/26/purging-proc/
5245 [enum]: https://github.com/rust-lang/rfcs/blob/master/text/0390-enum-namespacing.md
5246 [flex]: https://github.com/rust-lang/rfcs/blob/master/text/0131-target-specification.md
5247 [err]: https://github.com/rust-lang/rfcs/blob/master/text/0201-error-chaining.md
5248 [err-conv]: https://github.com/rust-lang/rfcs/blob/master/text/0236-error-conventions.md
5249 [rt]: https://github.com/rust-lang/rfcs/blob/master/text/0230-remove-runtime.md
5250 [mac]: https://github.com/rust-lang/rfcs/blob/master/text/0453-macro-reform.md
5251 [mac-future]: https://github.com/rust-lang/rfcs/pull/550
5252 [DST]: http://smallcultfollowing.com/babysteps/blog/2014/01/05/dst-take-5/
5253 [coll1]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md
5254 [coll2]: https://github.com/rust-lang/rfcs/blob/master/text/0509-collections-reform-part-2.md
5255 [coll3]: https://github.com/rust-lang/rfcs/blob/master/text/0216-collection-views.md
5256 [ops]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md
5257 [prelude]: https://github.com/rust-lang/rfcs/blob/master/text/0503-prelude-stabilization.md
5258 [where]: https://github.com/rust-lang/rfcs/blob/master/text/0135-where.md
5259 [refl]: https://github.com/rust-lang/rfcs/blob/master/text/0379-remove-reflection.md
5260 [panic]: https://github.com/rust-lang/rfcs/blob/master/text/0221-panic.md
5261 [structvars]: https://github.com/rust-lang/rfcs/blob/master/text/0418-struct-variants.md
5262 [hrtb]: https://github.com/rust-lang/rfcs/blob/master/text/0387-higher-ranked-trait-bounds.md
5263 [unicode]: https://github.com/rust-lang/rfcs/blob/master/text/0446-es6-unicode-escapes.md
5264 [oibit]: https://github.com/rust-lang/rfcs/blob/master/text/0019-opt-in-builtin-traits.md
5265 [macros]: https://github.com/rust-lang/rfcs/blob/master/text/0378-expr-macros.md
5266 [range]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md#indexing-and-slicing
5267 [arrays]: https://github.com/rust-lang/rfcs/blob/master/text/0520-new-array-repeat-syntax.md
5268 [show]: https://github.com/rust-lang/rfcs/blob/master/text/0504-show-stabilization.md
5269 [derive]: https://github.com/rust-lang/rfcs/blob/master/text/0534-deriving2derive.md
5270 [self]: https://github.com/rust-lang/rfcs/blob/master/text/0532-self-in-use.md
5271 [fb]: https://github.com/rust-lang/rfcs/blob/master/text/0212-restore-int-fallback.md
5272 [objsafe]: https://github.com/rust-lang/rfcs/blob/master/text/0255-object-safety.md
5273 [assoc]: https://github.com/rust-lang/rfcs/blob/master/text/0195-associated-items.md
5274 [ints]: https://github.com/rust-lang/rfcs/pull/544#issuecomment-68760871
5275 [trpl]: https://doc.rust-lang.org/book/index.html
5276 [rbe]: http://rustbyexample.com/
5279 Version 0.12.0 (2014-10-09)
5280 =============================
5282 * ~1900 changes, numerous bugfixes
5286 * The introductory documentation (now called The Rust Guide) has
5287 been completely rewritten, as have a number of supplementary
5289 * Rust's package manager, Cargo, continues to improve and is
5290 sometimes considered to be quite awesome.
5291 * Many API's in `std` have been reviewed and updated for
5292 consistency with the in-development Rust coding
5293 guidelines. The standard library documentation tracks
5294 stabilization progress.
5295 * Minor libraries have been moved out-of-tree to the rust-lang org
5296 on GitHub: uuid, semver, glob, num, hexfloat, fourcc. They can
5297 be installed with Cargo.
5298 * Lifetime elision allows lifetime annotations to be left off of
5299 function declarations in many common scenarios.
5300 * Rust now works on 64-bit Windows.
5303 * Indexing can be overloaded with the `Index` and `IndexMut`
5305 * The `if let` construct takes a branch only if the `let` pattern
5306 matches, currently behind the 'if_let' feature gate.
5307 * 'where clauses', a more flexible syntax for specifying trait
5308 bounds that is more aesthetic, have been added for traits and
5309 free functions. Where clauses will in the future make it
5310 possible to constrain associated types, which would be
5311 impossible with the existing syntax.
5312 * A new slicing syntax (e.g. `[0..4]`) has been introduced behind
5313 the 'slicing_syntax' feature gate, and can be overloaded with
5314 the `Slice` or `SliceMut` traits.
5315 * The syntax for matching of sub-slices has been changed to use a
5316 postfix `..` instead of prefix (.e.g. `[a, b, c..]`), for
5317 consistency with other uses of `..` and to future-proof
5318 potential additional uses of the syntax.
5319 * The syntax for matching inclusive ranges in patterns has changed
5320 from `0..3` to `0...4` to be consistent with the exclusive range
5322 * Matching of sub-slices in non-tail positions (e.g. `[a.., b,
5323 c]`) has been put behind the 'advanced_slice_patterns' feature
5324 gate and may be removed in the future.
5325 * Components of tuples and tuple structs can be extracted using
5326 the `value.0` syntax, currently behind the `tuple_indexing`
5328 * The `#[crate_id]` attribute is no longer supported; versioning
5329 is handled by the package manager.
5330 * Renaming crate imports are now written `extern crate foo as bar`
5331 instead of `extern crate bar = foo`.
5332 * Renaming use statements are now written `use foo as bar` instead
5334 * `let` and `match` bindings and argument names in macros are now
5336 * The new, more efficient, closure types ('unboxed closures') have
5337 been added under a feature gate, 'unboxed_closures'. These will
5338 soon replace the existing closure types, once higher-ranked
5339 trait lifetimes are added to the language.
5340 * `move` has been added as a keyword, for indicating closures
5341 that capture by value.
5342 * Mutation and assignment is no longer allowed in pattern guards.
5343 * Generic structs and enums can now have trait bounds.
5344 * The `Share` trait is now called `Sync` to free up the term
5345 'shared' to refer to 'shared reference' (the default reference
5347 * Dynamically-sized types have been mostly implemented,
5348 unifying the behavior of fat-pointer types with the rest of the
5350 * As part of dynamically-sized types, the `Sized` trait has been
5351 introduced, which qualifying types implement by default, and
5352 which type parameters expect by default. To specify that a type
5353 parameter does not need to be sized, write `<Sized? T>`. Most
5354 types are `Sized`, notable exceptions being unsized arrays
5355 (`[T]`) and trait types.
5356 * Closures can return `!`, as in `|| -> !` or `proc() -> !`.
5357 * Lifetime bounds can now be applied to type parameters and object
5359 * The old, reference counted GC type, `Gc<T>` which was once
5360 denoted by the `@` sigil, has finally been removed. GC will be
5361 revisited in the future.
5364 * Library documentation has been improved for a number of modules.
5365 * Bit-vectors, collections::bitv has been modernized.
5366 * The url crate is deprecated in favor of
5367 http://github.com/servo/rust-url, which can be installed with
5369 * Most I/O stream types can be cloned and subsequently closed from
5371 * A `std::time::Duration` type has been added for use in I/O
5372 methods that rely on timers, as well as in the 'time' crate's
5373 `Timespec` arithmetic.
5374 * The runtime I/O abstraction layer that enabled the green thread
5375 scheduler to do non-thread-blocking I/O has been removed, along
5376 with the libuv-based implementation employed by the green thread
5377 scheduler. This will greatly simplify the future I/O work.
5378 * `collections::btree` has been rewritten to have a more
5379 idiomatic and efficient design.
5382 * rustdoc output now indicates the stability levels of API's.
5383 * The `--crate-name` flag can specify the name of the crate
5384 being compiled, like `#[crate_name]`.
5385 * The `-C metadata` specifies additional metadata to hash into
5386 symbol names, and `-C extra-filename` specifies additional
5387 information to put into the output filename, for use by the
5388 package manager for versioning.
5389 * debug info generation has continued to improve and should be
5390 more reliable under both gdb and lldb.
5391 * rustc has experimental support for compiling in parallel
5392 using the `-C codegen-units` flag.
5393 * rustc no longer encodes rpath information into binaries by
5397 * Stack usage has been optimized with LLVM lifetime annotations.
5398 * Official Rust binaries on Linux are more compatible with older
5399 kernels and distributions, built on CentOS 5.10.
5402 Version 0.11.0 (2014-07-02)
5403 ==========================
5405 * ~1700 changes, numerous bugfixes
5408 * ~[T] has been removed from the language. This type is superseded by
5410 * ~str has been removed from the language. This type is superseded by
5412 * ~T has been removed from the language. This type is superseded by the
5414 * @T has been removed from the language. This type is superseded by the
5415 standard library's std::gc::Gc<T> type.
5416 * Struct fields are now all private by default.
5417 * Vector indices and shift amounts are both required to be a `uint`
5418 instead of any integral type.
5419 * Byte character, byte string, and raw byte string literals are now all
5420 supported by prefixing the normal literal with a `b`.
5421 * Multiple ABIs are no longer allowed in an ABI string
5422 * The syntax for lifetimes on closures/procedures has been tweaked
5423 slightly: `<'a>|A, B|: 'b + K -> T`
5424 * Floating point modulus has been removed from the language; however it
5425 is still provided by a library implementation.
5426 * Private enum variants are now disallowed.
5427 * The `priv` keyword has been removed from the language.
5428 * A closure can no longer be invoked through a &-pointer.
5429 * The `use foo, bar, baz;` syntax has been removed from the language.
5430 * The transmute intrinsic no longer works on type parameters.
5431 * Statics now allow blocks/items in their definition.
5432 * Trait bounds are separated from objects with + instead of : now.
5433 * Objects can no longer be read while they are mutably borrowed.
5434 * The address of a static is now marked as insignificant unless the
5435 #[inline(never)] attribute is placed it.
5436 * The #[unsafe_destructor] attribute is now behind a feature gate.
5437 * Struct literals are no longer allowed in ambiguous positions such as
5438 if, while, match, and for..in.
5439 * Declaration of lang items and intrinsics are now feature-gated by
5441 * Integral literals no longer default to `int`, and floating point
5442 literals no longer default to `f64`. Literals must be suffixed with an
5443 appropriate type if inference cannot determine the type of the
5445 * The Box<T> type is no longer implicitly borrowed to &mut T.
5446 * Procedures are now required to not capture borrowed references.
5449 * The standard library is now a "facade" over a number of underlying
5450 libraries. This means that development on the standard library should
5451 be speedier due to smaller crates, as well as a clearer line between
5453 * A new library, libcore, lives under the standard library's facade
5454 which is Rust's "0-assumption" library, suitable for embedded and
5455 kernel development for example.
5456 * A regex crate has been added to the standard distribution. This crate
5457 includes statically compiled regular expressions.
5458 * The unwrap/unwrap_err methods on Result require a Show bound for
5459 better error messages.
5460 * The return types of the std::comm primitives have been centralized
5461 around the Result type.
5462 * A number of I/O primitives have gained the ability to time out their
5464 * A number of I/O primitives have gained the ability to close their
5465 reading/writing halves to cancel pending operations.
5466 * Reverse iterator methods have been removed in favor of `rev()` on
5467 their forward-iteration counterparts.
5468 * A bitflags! macro has been added to enable easy interop with C and
5469 management of bit flags.
5470 * A debug_assert! macro is now provided which is disabled when
5471 `--cfg ndebug` is passed to the compiler.
5472 * A graphviz crate has been added for creating .dot files.
5473 * The std::cast module has been migrated into std::mem.
5474 * The std::local_data api has been migrated from freestanding functions
5475 to being based on methods.
5476 * The Pod trait has been renamed to Copy.
5477 * jemalloc has been added as the default allocator for types.
5478 * The API for allocating memory has been changed to use proper alignment
5479 and sized deallocation
5480 * Connecting a TcpStream or binding a TcpListener is now based on a
5481 string address and a u16 port. This allows connecting to a hostname as
5483 * The Reader trait now contains a core method, read_at_least(), which
5484 correctly handles many repeated 0-length reads.
5485 * The process-spawning API is now centered around a builder-style
5487 * The :? printing qualifier has been moved from the standard library to
5488 an external libdebug crate.
5489 * Eq/Ord have been renamed to PartialEq/PartialOrd. TotalEq/TotalOrd
5490 have been renamed to Eq/Ord.
5491 * The select/plural methods have been removed from format!. The escapes
5492 for { and } have also changed from \{ and \} to {{ and }},
5494 * The TaskBuilder API has been re-worked to be a true builder, and
5495 extension traits for spawning native/green tasks have been added.
5498 * All breaking changes to the language or libraries now have their
5499 commit message annotated with `[breaking-change]` to allow for easy
5500 discovery of breaking changes.
5501 * The compiler will now try to suggest how to annotate lifetimes if a
5502 lifetime-related error occurs.
5503 * Debug info continues to be improved greatly with general bug fixes and
5504 better support for situations like link time optimization (LTO).
5505 * Usage of syntax extensions when cross-compiling has been fixed.
5506 * Functionality equivalent to GCC & Clang's -ffunction-sections,
5507 -fdata-sections and --gc-sections has been enabled by default
5508 * The compiler is now stricter about where it will load module files
5509 from when a module is declared via `mod foo;`.
5510 * The #[phase(syntax)] attribute has been renamed to #[phase(plugin)].
5511 Syntax extensions are now discovered via a "plugin registrar" type
5512 which will be extended in the future to other various plugins.
5513 * Lints have been restructured to allow for dynamically loadable lints.
5514 * A number of rustdoc improvements:
5515 * The HTML output has been visually redesigned.
5516 * Markdown is now powered by hoedown instead of sundown.
5517 * Searching heuristics have been greatly improved.
5518 * The search index has been reduced in size by a great amount.
5519 * Cross-crate documentation via `pub use` has been greatly improved.
5520 * Primitive types are now hyperlinked and documented.
5521 * Documentation has been moved from static.rust-lang.org/doc to
5523 * A new sandbox, play.rust-lang.org, is available for running and
5524 sharing rust code examples on-line.
5525 * Unused attributes are now more robustly warned about.
5526 * The dead_code lint now warns about unused struct fields.
5527 * Cross-compiling to iOS is now supported.
5528 * Cross-compiling to mipsel is now supported.
5529 * Stability attributes are now inherited by default and no longer apply
5530 to intra-crate usage, only inter-crate usage.
5531 * Error message related to non-exhaustive match expressions have been
5535 Version 0.10 (2014-04-03)
5536 =========================
5538 * ~1500 changes, numerous bugfixes
5541 * A new RFC process is now in place for modifying the language.
5542 * Patterns with `@`-pointers have been removed from the language.
5543 * Patterns with unique vectors (`~[T]`) have been removed from the
5545 * Patterns with unique strings (`~str`) have been removed from the
5547 * `@str` has been removed from the language.
5548 * `@[T]` has been removed from the language.
5549 * `@self` has been removed from the language.
5550 * `@Trait` has been removed from the language.
5551 * Headers on `~` allocations which contain `@` boxes inside the type for
5552 reference counting have been removed.
5553 * The semantics around the lifetimes of temporary expressions have changed,
5554 see #3511 and #11585 for more information.
5555 * Cross-crate syntax extensions are now possible, but feature gated. See
5556 #11151 for more information. This includes both `macro_rules!` macros as
5557 well as syntax extensions such as `format!`.
5558 * New lint modes have been added, and older ones have been turned on to be
5560 * Unnecessary parentheses
5563 * Uppercase variables
5564 * Publicly visible private types
5565 * `#[deriving]` with raw pointers
5566 * Unsafe functions can no longer be coerced to closures.
5567 * Various obscure macros such as `log_syntax!` are now behind feature gates.
5568 * The `#[simd]` attribute is now behind a feature gate.
5569 * Visibility is no longer allowed on `extern crate` statements, and
5570 unnecessary visibility (`priv`) is no longer allowed on `use` statements.
5571 * Trailing commas are now allowed in argument lists and tuple patterns.
5572 * The `do` keyword has been removed, it is now a reserved keyword.
5573 * Default type parameters have been implemented, but are feature gated.
5574 * Borrowed variables through captures in closures are now considered soundly.
5575 * `extern mod` is now `extern crate`
5576 * The `Freeze` trait has been removed.
5577 * The `Share` trait has been added for types that can be shared among
5579 * Labels in macros are now hygienic.
5580 * Expression/statement macro invocations can be delimited with `{}` now.
5581 * Treatment of types allowed in `static mut` locations has been tweaked.
5582 * The `*` and `.` operators are now overloadable through the `Deref` and
5584 * `~Trait` and `proc` no longer have `Send` bounds by default.
5585 * Partial type hints are now supported with the `_` type marker.
5586 * An `Unsafe` type was introduced for interior mutability. It is now
5587 considered undefined to transmute from `&T` to `&mut T` without using the
5589 * The #[linkage] attribute was implemented for extern statics/functions.
5590 * The inner attribute syntax has changed from `#[foo];` to `#![foo]`.
5591 * `Pod` was renamed to `Copy`.
5594 * The `libextra` library has been removed. It has now been decomposed into
5595 component libraries with smaller and more focused nuggets of
5596 functionality. The full list of libraries can be found on the
5597 documentation index page.
5598 * std: `std::condition` has been removed. All I/O errors are now propagated
5599 through the `Result` type. In order to assist with error handling, a
5600 `try!` macro for unwrapping errors with an early return and a lint for
5601 unused results has been added. See #12039 for more information.
5602 * std: The `vec` module has been renamed to `slice`.
5603 * std: A new vector type, `Vec<T>`, has been added in preparation for DST.
5604 This will become the only growable vector in the future.
5605 * std: `std::io` now has more public re-exports. Types such as `BufferedReader`
5606 are now found at `std::io::BufferedReader` instead of
5607 `std::io::buffered::BufferedReader`.
5608 * std: `print` and `println` are no longer in the prelude, the `print!` and
5609 `println!` macros are intended to be used instead.
5610 * std: `Rc` now has a `Weak` pointer for breaking cycles, and it no longer
5611 attempts to statically prevent cycles.
5612 * std: The standard distribution is adopting the policy of pushing failure
5613 to the user rather than failing in libraries. Many functions (such as
5614 `slice::last()`) now return `Option<T>` instead of `T` + failing.
5615 * std: `fmt::Default` has been renamed to `fmt::Show`, and it now has a new
5616 deriving mode: `#[deriving(Show)]`.
5617 * std: `ToStr` is now implemented for all types implementing `Show`.
5618 * std: The formatting trait methods now take `&self` instead of `&T`
5619 * std: The `invert()` method on iterators has been renamed to `rev()`
5620 * std: `std::num` has seen a reduction in the genericity of its traits,
5621 consolidating functionality into a few core traits.
5622 * std: Backtraces are now printed on task failure if the environment
5623 variable `RUST_BACKTRACE` is present.
5624 * std: Naming conventions for iterators have been standardized. More details
5625 can be found on the wiki's style guide.
5626 * std: `eof()` has been removed from the `Reader` trait. Specific types may
5627 still implement the function.
5628 * std: Networking types are now cloneable to allow simultaneous reads/writes.
5629 * std: `assert_approx_eq!` has been removed
5630 * std: The `e` and `E` formatting specifiers for floats have been added to
5631 print them in exponential notation.
5632 * std: The `Times` trait has been removed
5633 * std: Indications of variance and opting out of builtin bounds is done
5634 through marker types in `std::kinds::marker` now
5635 * std: `hash` has been rewritten, `IterBytes` has been removed, and
5636 `#[deriving(Hash)]` is now possible.
5637 * std: `SharedChan` has been removed, `Sender` is now cloneable.
5638 * std: `Chan` and `Port` were renamed to `Sender` and `Receiver`.
5639 * std: `Chan::new` is now `channel()`.
5640 * std: A new synchronous channel type has been implemented.
5641 * std: A `select!` macro is now provided for selecting over `Receiver`s.
5642 * std: `hashmap` and `trie` have been moved to `libcollections`
5643 * std: `run` has been rolled into `io::process`
5644 * std: `assert_eq!` now uses `{}` instead of `{:?}`
5645 * std: The equality and comparison traits have seen some reorganization.
5646 * std: `rand` has moved to `librand`.
5647 * std: `to_{lower,upper}case` has been implemented for `char`.
5648 * std: Logging has been moved to `liblog`.
5649 * collections: `HashMap` has been rewritten for higher performance and less
5651 * native: The default runtime is now `libnative`. If `libgreen` is desired,
5652 it can be booted manually. The runtime guide has more information and
5654 * native: All I/O functionality except signals has been implemented.
5655 * green: Task spawning with `libgreen` has been optimized with stack caching
5656 and various trimming of code.
5657 * green: Tasks spawned by `libgreen` now have an unmapped guard page.
5658 * sync: The `extra::sync` module has been updated to modern rust (and moved
5659 to the `sync` library), tweaking and improving various interfaces while
5660 dropping redundant functionality.
5661 * sync: A new `Barrier` type has been added to the `sync` library.
5662 * sync: An efficient mutex for native and green tasks has been implemented.
5663 * serialize: The `base64` module has seen some improvement. It treats
5664 newlines better, has non-string error values, and has seen general
5666 * fourcc: A `fourcc!` macro was introduced
5667 * hexfloat: A `hexfloat!` macro was implemented for specifying floats via a
5668 hexadecimal literal.
5671 * `rustpkg` has been deprecated and removed from the main repository. Its
5672 replacement, `cargo`, is under development.
5673 * Nightly builds of rust are now available
5674 * The memory usage of rustc has been improved many times throughout this
5676 * The build process supports disabling rpath support for the rustc binary
5678 * Code generation has improved in some cases, giving more information to the
5679 LLVM optimization passes to enable more extensive optimizations.
5680 * Debuginfo compatibility with lldb on OSX has been restored.
5681 * The master branch is now gated on an android bot, making building for
5682 android much more reliable.
5683 * Output flags have been centralized into one `--emit` flag.
5684 * Crate type flags have been centralized into one `--crate-type` flag.
5685 * Codegen flags have been consolidated behind a `-C` flag.
5686 * Linking against outdated crates now has improved error messages.
5687 * Error messages with lifetimes will often suggest how to annotate the
5688 function to fix the error.
5689 * Many more types are documented in the standard library, and new guides
5691 * Many `rustdoc` improvements:
5692 * code blocks are syntax highlighted.
5693 * render standalone markdown files.
5694 * the --test flag tests all code blocks by default.
5695 * exported macros are displayed.
5696 * re-exported types have their documentation inlined at the location of the
5698 * search works across crates that have been rendered to the same output
5702 Version 0.9 (2014-01-09)
5703 ==========================
5705 * ~1800 changes, numerous bugfixes
5708 * The `float` type has been removed. Use `f32` or `f64` instead.
5709 * A new facility for enabling experimental features (feature gating) has
5710 been added, using the crate-level `#[feature(foo)]` attribute.
5711 * Managed boxes (@) are now behind a feature gate
5712 (`#[feature(managed_boxes)]`) in preparation for future removal. Use the
5713 standard library's `Gc` or `Rc` types instead.
5714 * `@mut` has been removed. Use `std::cell::{Cell, RefCell}` instead.
5715 * Jumping back to the top of a loop is now done with `continue` instead of
5717 * Strings can no longer be mutated through index assignment.
5718 * Raw strings can be created via the basic `r"foo"` syntax or with matched
5719 hash delimiters, as in `r###"foo"###`.
5720 * `~fn` is now written `proc (args) -> retval { ... }` and may only be
5722 * The `&fn` type is now written `|args| -> ret` to match the literal form.
5723 * `@fn`s have been removed.
5724 * `do` only works with procs in order to make it obvious what the cost
5726 * Single-element tuple-like structs can no longer be dereferenced to
5727 obtain the inner value. A more comprehensive solution for overloading
5728 the dereference operator will be provided in the future.
5729 * The `#[link(...)]` attribute has been replaced with
5730 `#[crate_id = "name#vers"]`.
5731 * Empty `impl`s must be terminated with empty braces and may not be
5732 terminated with a semicolon.
5733 * Keywords are no longer allowed as lifetime names; the `self` lifetime
5734 no longer has any special meaning.
5735 * The old `fmt!` string formatting macro has been removed.
5736 * `printf!` and `printfln!` (old-style formatting) removed in favor of
5737 `print!` and `println!`.
5738 * `mut` works in patterns now, as in `let (mut x, y) = (1, 2);`.
5739 * The `extern mod foo (name = "bar")` syntax has been removed. Use
5740 `extern mod foo = "bar"` instead.
5741 * New reserved keywords: `alignof`, `offsetof`, `sizeof`.
5742 * Macros can have attributes.
5743 * Macros can expand to items with attributes.
5744 * Macros can expand to multiple items.
5745 * The `asm!` macro is feature-gated (`#[feature(asm)]`).
5746 * Comments may be nested.
5747 * Values automatically coerce to trait objects they implement, without
5749 * Enum discriminants are no longer an entire word but as small as needed to
5750 contain all the variants. The `repr` attribute can be used to override
5751 the discriminant size, as in `#[repr(int)]` for integer-sized, and
5752 `#[repr(C)]` to match C enums.
5753 * Non-string literals are not allowed in attributes (they never worked).
5754 * The FFI now supports variadic functions.
5755 * Octal numeric literals, as in `0o7777`.
5756 * The `concat!` syntax extension performs compile-time string concatenation.
5757 * The `#[fixed_stack_segment]` and `#[rust_stack]` attributes have been
5758 removed as Rust no longer uses segmented stacks.
5759 * Non-ascii identifiers are feature-gated (`#[feature(non_ascii_idents)]`).
5760 * Ignoring all fields of an enum variant or tuple-struct is done with `..`,
5761 not `*`; ignoring remaining fields of a struct is also done with `..`,
5762 not `_`; ignoring a slice of a vector is done with `..`, not `.._`.
5763 * `rustc` supports the "win64" calling convention via `extern "win64"`.
5764 * `rustc` supports the "system" calling convention, which defaults to the
5765 preferred convention for the target platform, "stdcall" on 32-bit Windows,
5767 * The `type_overflow` lint (default: warn) checks literals for overflow.
5768 * The `unsafe_block` lint (default: allow) checks for usage of `unsafe`.
5769 * The `attribute_usage` lint (default: warn) warns about unknown
5771 * The `unknown_features` lint (default: warn) warns about unknown
5773 * The `dead_code` lint (default: warn) checks for dead code.
5774 * Rust libraries can be linked statically to one another
5775 * `#[link_args]` is behind the `link_args` feature gate.
5776 * Native libraries are now linked with `#[link(name = "foo")]`
5777 * Native libraries can be statically linked to a rust crate
5778 (`#[link(name = "foo", kind = "static")]`).
5779 * Native OS X frameworks are now officially supported
5780 (`#[link(name = "foo", kind = "framework")]`).
5781 * The `#[thread_local]` attribute creates thread-local (not task-local)
5782 variables. Currently behind the `thread_local` feature gate.
5783 * The `return` keyword may be used in closures.
5784 * Types that can be copied via a memcpy implement the `Pod` kind.
5785 * The `cfg` attribute can now be used on struct fields and enum variants.
5788 * std: The `option` and `result` API's have been overhauled to make them
5789 simpler, more consistent, and more composable.
5790 * std: The entire `std::io` module has been replaced with one that is
5791 more comprehensive and that properly interfaces with the underlying
5792 scheduler. File, TCP, UDP, Unix sockets, pipes, and timers are all
5794 * std: `io::util` contains a number of useful implementations of
5795 `Reader` and `Writer`, including `NullReader`, `NullWriter`,
5796 `ZeroReader`, `TeeReader`.
5797 * std: The reference counted pointer type `extra::rc` moved into std.
5798 * std: The `Gc` type in the `gc` module will replace `@` (it is currently
5799 just a wrapper around it).
5800 * std: The `Either` type has been removed.
5801 * std: `fmt::Default` can be implemented for any type to provide default
5802 formatting to the `format!` macro, as in `format!("{}", myfoo)`.
5803 * std: The `rand` API continues to be tweaked.
5804 * std: The `rust_begin_unwind` function, useful for inserting breakpoints
5805 on failure in gdb, is now named `rust_fail`.
5806 * std: The `each_key` and `each_value` methods on `HashMap` have been
5807 replaced by the `keys` and `values` iterators.
5808 * std: Functions dealing with type size and alignment have moved from the
5809 `sys` module to the `mem` module.
5810 * std: The `path` module was written and API changed.
5811 * std: `str::from_utf8` has been changed to cast instead of allocate.
5812 * std: `starts_with` and `ends_with` methods added to vectors via the
5813 `ImmutableEqVector` trait, which is in the prelude.
5814 * std: Vectors can be indexed with the `get_opt` method, which returns `None`
5815 if the index is out of bounds.
5816 * std: Task failure no longer propagates between tasks, as the model was
5817 complex, expensive, and incompatible with thread-based tasks.
5818 * std: The `Any` type can be used for dynamic typing.
5819 * std: `~Any` can be passed to the `fail!` macro and retrieved via
5821 * std: Methods that produce iterators generally do not have an `_iter`
5823 * std: `cell::Cell` and `cell::RefCell` can be used to introduce mutability
5824 roots (mutable fields, etc.). Use instead of e.g. `@mut`.
5825 * std: `util::ignore` renamed to `prelude::drop`.
5826 * std: Slices have `sort` and `sort_by` methods via the `MutableVector`
5828 * std: `vec::raw` has seen a lot of cleanup and API changes.
5829 * std: The standard library no longer includes any C++ code, and very
5830 minimal C, eliminating the dependency on libstdc++.
5831 * std: Runtime scheduling and I/O functionality has been factored out into
5832 extensible interfaces and is now implemented by two different crates:
5833 libnative, for native threading and I/O; and libgreen, for green threading
5834 and I/O. This paves the way for using the standard library in more limited
5835 embedded environments.
5836 * std: The `comm` module has been rewritten to be much faster, have a
5837 simpler, more consistent API, and to work for both native and green
5839 * std: All libuv dependencies have been moved into the rustuv crate.
5840 * native: New implementations of runtime scheduling on top of OS threads.
5841 * native: New native implementations of TCP, UDP, file I/O, process spawning,
5843 * green: The green thread scheduler and message passing types are almost
5845 * extra: The `flatpipes` module had bitrotted and was removed.
5846 * extra: All crypto functions have been removed and Rust now has a policy of
5847 not reimplementing crypto in the standard library. In the future crypto
5848 will be provided by external crates with bindings to established libraries.
5849 * extra: `c_vec` has been modernized.
5850 * extra: The `sort` module has been removed. Use the `sort` method on
5854 * The `rust` and `rusti` commands have been removed, due to lack of
5856 * `rustdoc` was completely rewritten.
5857 * `rustdoc` can test code examples in documentation.
5858 * `rustpkg` can test packages with the argument, 'test'.
5859 * `rustpkg` supports arbitrary dependencies, including C libraries.
5860 * `rustc`'s support for generating debug info is improved again.
5861 * `rustc` has better error reporting for unbalanced delimiters.
5862 * `rustc`'s JIT support was removed due to bitrot.
5863 * Executables and static libraries can be built with LTO (-Z lto)
5864 * `rustc` adds a `--dep-info` flag for communicating dependencies to
5868 Version 0.8 (2013-09-26)
5869 ============================
5871 * ~2200 changes, numerous bugfixes
5874 * The `for` loop syntax has changed to work with the `Iterator` trait.
5875 * At long last, unwinding works on Windows.
5876 * Default methods are ready for use.
5877 * Many trait inheritance bugs fixed.
5878 * Owned and borrowed trait objects work more reliably.
5879 * `copy` is no longer a keyword. It has been replaced by the `Clone` trait.
5880 * rustc can omit emission of code for the `debug!` macro if it is passed
5882 * mod.rs is now "blessed". When loading `mod foo;`, rustc will now look
5883 for foo.rs, then foo/mod.rs, and will generate an error when both are
5885 * Strings no longer contain trailing nulls. The new `std::c_str` module
5886 provides new mechanisms for converting to C strings.
5887 * The type of foreign functions is now `extern "C" fn` instead of `*u8'.
5888 * The FFI has been overhauled such that foreign functions are called directly,
5889 instead of through a stack-switching wrapper.
5890 * Calling a foreign function must be done through a Rust function with the
5891 `#[fixed_stack_segment]` attribute.
5892 * The `externfn!` macro can be used to declare both a foreign function and
5893 a `#[fixed_stack_segment]` wrapper at once.
5894 * `pub` and `priv` modifiers on `extern` blocks are no longer parsed.
5895 * `unsafe` is no longer allowed on extern fns - they are all unsafe.
5896 * `priv` is disallowed everywhere except for struct fields and enum variants.
5897 * `&T` (besides `&'static T`) is no longer allowed in `@T`.
5898 * `ref` bindings in irrefutable patterns work correctly now.
5899 * `char` is now prevented from containing invalid code points.
5900 * Casting to `bool` is no longer allowed.
5901 * `\0` is now accepted as an escape in chars and strings.
5902 * `yield` is a reserved keyword.
5903 * `typeof` is a reserved keyword.
5904 * Crates may be imported by URL with `extern mod foo = "url";`.
5905 * Explicit enum discriminants may be given as uints as in `enum E { V = 0u }`
5906 * Static vectors can be initialized with repeating elements,
5907 e.g. `static foo: [u8, .. 100]: [0, .. 100];`.
5908 * Static structs can be initialized with functional record update,
5909 e.g. `static foo: Foo = Foo { a: 5, .. bar };`.
5910 * `cfg!` can be used to conditionally execute code based on the crate
5911 configuration, similarly to `#[cfg(...)]`.
5912 * The `unnecessary_qualification` lint detects unneeded module
5913 prefixes (default: allow).
5914 * Arithmetic operations have been implemented on the SIMD types in
5915 `std::unstable::simd`.
5916 * Exchange allocation headers were removed, reducing memory usage.
5917 * `format!` implements a completely new, extensible, and higher-performance
5918 string formatting system. It will replace `fmt!`.
5919 * `print!` and `println!` write formatted strings (using the `format!`
5920 extension) to stdout.
5921 * `write!` and `writeln!` write formatted strings (using the `format!`
5922 extension) to the new Writers in `std::rt::io`.
5923 * The library section in which a function or static is placed may
5924 be specified with `#[link_section = "..."]`.
5925 * The `proto!` syntax extension for defining bounded message protocols
5927 * `macro_rules!` is hygienic for `let` declarations.
5928 * The `#[export_name]` attribute specifies the name of a symbol.
5929 * `unreachable!` can be used to indicate unreachable code, and fails
5933 * std: Transitioned to the new runtime, written in Rust.
5934 * std: Added an experimental I/O library, `rt::io`, based on the new
5936 * std: A new generic `range` function was added to the prelude, replacing
5937 `uint::range` and friends.
5938 * std: `range_rev` no longer exists. Since range is an iterator it can be
5939 reversed with `range(lo, hi).invert()`.
5940 * std: The `chain` method on option renamed to `and_then`; `unwrap_or_default`
5941 renamed to `unwrap_or`.
5942 * std: The `iterator` module was renamed to `iter`.
5943 * std: Integral types now support the `checked_add`, `checked_sub`, and
5944 `checked_mul` operations for detecting overflow.
5945 * std: Many methods in `str`, `vec`, `option, `result` were renamed for
5947 * std: Methods are standardizing on conventions for casting methods:
5948 `to_foo` for copying, `into_foo` for moving, `as_foo` for temporary
5950 * std: The `CString` type in `c_str` provides new ways to convert to and
5952 * std: `DoubleEndedIterator` can yield elements in two directions.
5953 * std: The `mut_split` method on vectors partitions an `&mut [T]` into
5955 * std: `str::from_bytes` renamed to `str::from_utf8`.
5956 * std: `pop_opt` and `shift_opt` methods added to vectors.
5957 * std: The task-local data interface no longer uses @, and keys are
5958 no longer function pointers.
5959 * std: The `swap_unwrap` method of `Option` renamed to `take_unwrap`.
5960 * std: Added `SharedPort` to `comm`.
5961 * std: `Eq` has a default method for `ne`; only `eq` is required
5963 * std: `Ord` has default methods for `le`, `gt` and `ge`; only `lt`
5964 is required in implementations.
5965 * std: `is_utf8` performance is improved, impacting many string functions.
5966 * std: `os::MemoryMap` provides cross-platform mmap.
5967 * std: `ptr::offset` is now unsafe, but also more optimized. Offsets that
5968 are not 'in-bounds' are considered undefined.
5969 * std: Many freestanding functions in `vec` removed in favor of methods.
5970 * std: Many freestanding functions on scalar types removed in favor of
5972 * std: Many options to task builders were removed since they don't make
5973 sense in the new scheduler design.
5974 * std: More containers implement `FromIterator` so can be created by the
5976 * std: More complete atomic types in `unstable::atomics`.
5977 * std: `comm::PortSet` removed.
5978 * std: Mutating methods in the `Set` and `Map` traits have been moved into
5979 the `MutableSet` and `MutableMap` traits. `Container::is_empty`,
5980 `Map::contains_key`, `MutableMap::insert`, and `MutableMap::remove` have
5981 default implementations.
5982 * std: Various `from_str` functions were removed in favor of a generic
5983 `from_str` which is available in the prelude.
5984 * std: `util::unreachable` removed in favor of the `unreachable!` macro.
5985 * extra: `dlist`, the doubly-linked list was modernized.
5986 * extra: Added a `hex` module with `ToHex` and `FromHex` traits.
5987 * extra: Added `glob` module, replacing `std::os::glob`.
5988 * extra: `rope` was removed.
5989 * extra: `deque` was renamed to `ringbuf`. `RingBuf` implements `Deque`.
5990 * extra: `net`, and `timer` were removed. The experimental replacements
5991 are `std::rt::io::net` and `std::rt::io::timer`.
5992 * extra: Iterators implemented for `SmallIntMap`.
5993 * extra: Iterators implemented for `Bitv` and `BitvSet`.
5994 * extra: `SmallIntSet` removed. Use `BitvSet`.
5995 * extra: Performance of JSON parsing greatly improved.
5996 * extra: `semver` updated to SemVer 2.0.0.
5997 * extra: `term` handles more terminals correctly.
5998 * extra: `dbg` module removed.
5999 * extra: `par` module removed.
6000 * extra: `future` was cleaned up, with some method renames.
6001 * extra: Most free functions in `getopts` were converted to methods.
6004 * rustc's debug info generation (`-Z debug-info`) is greatly improved.
6005 * rustc accepts `--target-cpu` to compile to a specific CPU architecture,
6006 similarly to gcc's `--march` flag.
6007 * rustc's performance compiling small crates is much better.
6008 * rustpkg has received many improvements.
6009 * rustpkg supports git tags as package IDs.
6010 * rustpkg builds into target-specific directories so it can be used for
6012 * The number of concurrent test tasks is controlled by the environment
6013 variable RUST_TEST_TASKS.
6014 * The test harness can now report metrics for benchmarks.
6015 * All tools have man pages.
6016 * Programs compiled with `--test` now support the `-h` and `--help` flags.
6017 * The runtime uses jemalloc for allocations.
6018 * Segmented stacks are temporarily disabled as part of the transition to
6019 the new runtime. Stack overflows are possible!
6020 * A new documentation backend, rustdoc_ng, is available for use. It is
6021 still invoked through the normal `rustdoc` command.
6024 Version 0.7 (2013-07-03)
6025 =======================
6027 * ~2000 changes, numerous bugfixes
6030 * `impl`s no longer accept a visibility qualifier. Put them on methods
6032 * The borrow checker has been rewritten with flow-sensitivity, fixing
6033 many bugs and inconveniences.
6034 * The `self` parameter no longer implicitly means `&'self self`,
6035 and can be explicitly marked with a lifetime.
6036 * Overloadable compound operators (`+=`, etc.) have been temporarily
6037 removed due to bugs.
6038 * The `for` loop protocol now requires `for`-iterators to return `bool`
6039 so they compose better.
6040 * The `Durable` trait is replaced with the `'static` bounds.
6041 * Trait default methods work more often.
6042 * Structs with the `#[packed]` attribute have byte alignment and
6043 no padding between fields.
6044 * Type parameters bound by `Copy` must now be copied explicitly with
6046 * It is now illegal to move out of a dereferenced unsafe pointer.
6047 * `Option<~T>` is now represented as a nullable pointer.
6048 * `@mut` does dynamic borrow checks correctly.
6049 * The `main` function is only detected at the topmost level of the crate.
6050 The `#[main]` attribute is still valid anywhere.
6051 * Struct fields may no longer be mutable. Use inherited mutability.
6052 * The `#[no_send]` attribute makes a type that would otherwise be
6054 * The `#[no_freeze]` attribute makes a type that would otherwise be
6056 * Unbounded recursion will abort the process after reaching the limit
6057 specified by the `RUST_MAX_STACK` environment variable (default: 1GB).
6058 * The `vecs_implicitly_copyable` lint mode has been removed. Vectors
6059 are never implicitly copyable.
6060 * `#[static_assert]` makes compile-time assertions about static bools.
6061 * At long last, 'argument modes' no longer exist.
6062 * The rarely used `use mod` statement no longer exists.
6065 * `fail!` and `assert!` accept `~str`, `&'static str` or `fmt!`-style
6067 * `Encodable`, `Decodable`, `Ord`, `TotalOrd`, `TotalEq`, `DeepClone`,
6068 `Rand`, `Zero` and `ToStr` can all be automatically derived with
6070 * The `bytes!` macro returns a vector of bytes for string, u8, char,
6071 and unsuffixed integer literals.
6074 * The `core` crate was renamed to `std`.
6075 * The `std` crate was renamed to `extra`.
6076 * More and improved documentation.
6077 * std: `iterator` module for external iterator objects.
6078 * Many old-style (internal, higher-order function) iterators replaced by
6079 implementations of `Iterator`.
6080 * std: Many old internal vector and string iterators,
6081 incl. `any`, `all`. removed.
6082 * std: The `finalize` method of `Drop` renamed to `drop`.
6083 * std: The `drop` method now takes `&mut self` instead of `&self`.
6084 * std: The prelude no longer re-exports any modules, only types and traits.
6085 * std: Prelude additions: `print`, `println`, `FromStr`, `ApproxEq`, `Equiv`,
6086 `Iterator`, `IteratorUtil`, many numeric traits, many tuple traits.
6087 * std: New numeric traits: `Fractional`, `Real`, `RealExt`, `Integer`, `Ratio`,
6088 `Algebraic`, `Trigonometric`, `Exponential`, `Primitive`.
6089 * std: Tuple traits and accessors defined for up to 12-tuples, e.g.
6090 `(0, 1, 2).n2()` or `(0, 1, 2).n2_ref()`.
6091 * std: Many types implement `Clone`.
6092 * std: `path` type renamed to `Path`.
6093 * std: `mut` module and `Mut` type removed.
6094 * std: Many standalone functions removed in favor of methods and iterators
6095 in `vec`, `str`. In the future methods will also work as functions.
6096 * std: `reinterpret_cast` removed. Use `transmute`.
6097 * std: ascii string handling in `std::ascii`.
6098 * std: `Rand` is implemented for ~/@.
6099 * std: `run` module for spawning processes overhauled.
6100 * std: Various atomic types added to `unstable::atomic`.
6101 * std: Various types implement `Zero`.
6102 * std: `LinearMap` and `LinearSet` renamed to `HashMap` and `HashSet`.
6103 * std: Borrowed pointer functions moved from `ptr` to `borrow`.
6104 * std: Added `os::mkdir_recursive`.
6105 * std: Added `os::glob` function performs filesystems globs.
6106 * std: `FuzzyEq` renamed to `ApproxEq`.
6107 * std: `Map` now defines `pop` and `swap` methods.
6108 * std: `Cell` constructors converted to static methods.
6109 * extra: `rc` module adds the reference counted pointers, `Rc` and `RcMut`.
6110 * extra: `flate` module moved from `std` to `extra`.
6111 * extra: `fileinput` module for iterating over a series of files.
6112 * extra: `Complex` number type and `complex` module.
6113 * extra: `Rational` number type and `rational` module.
6114 * extra: `BigInt`, `BigUint` implement numeric and comparison traits.
6115 * extra: `term` uses terminfo now, is more correct.
6116 * extra: `arc` functions converted to methods.
6117 * extra: Implementation of fixed output size variations of SHA-2.
6120 * `unused_variable` lint mode for unused variables (default: warn).
6121 * `unused_unsafe` lint mode for detecting unnecessary `unsafe` blocks
6123 * `unused_mut` lint mode for identifying unused `mut` qualifiers
6125 * `dead_assignment` lint mode for unread variables (default: warn).
6126 * `unnecessary_allocation` lint mode detects some heap allocations that are
6127 immediately borrowed so could be written without allocating (default: warn).
6128 * `missing_doc` lint mode (default: allow).
6129 * `unreachable_code` lint mode (default: warn).
6130 * The `rusti` command has been rewritten and a number of bugs addressed.
6131 * rustc outputs in color on more terminals.
6132 * rustc accepts a `--link-args` flag to pass arguments to the linker.
6133 * rustc accepts a `-Z print-link-args` flag for debugging linkage.
6134 * Compiling with `-g` will make the binary record information about
6135 dynamic borrowcheck failures for debugging.
6136 * rustdoc has a nicer stylesheet.
6137 * Various improvements to rustdoc.
6138 * Improvements to rustpkg (see the detailed release notes).
6141 Version 0.6 (2013-04-03)
6142 ========================
6144 * ~2100 changes, numerous bugfixes
6147 * The self type parameter in traits is now spelled `Self`
6148 * The `self` parameter in trait and impl methods must now be explicitly
6149 named (for example: `fn f(&self) { }`). Implicit self is deprecated.
6150 * Static methods no longer require the `static` keyword and instead
6151 are distinguished by the lack of a `self` parameter
6152 * Replaced the `Durable` trait with the `'static` lifetime
6153 * The old closure type syntax with the trailing sigil has been
6154 removed in favor of the more consistent leading sigil
6155 * `super` is a keyword, and may be prefixed to paths
6156 * Trait bounds are separated with `+` instead of whitespace
6157 * Traits are implemented with `impl Trait for Type`
6158 instead of `impl Type: Trait`
6159 * Lifetime syntax is now `&'l foo` instead of `&l/foo`
6160 * The `export` keyword has finally been removed
6161 * The `move` keyword has been removed (see "Semantic changes")
6162 * The interior mutability qualifier on vectors, `[mut T]`, has been
6163 removed. Use `&mut [T]`, etc.
6164 * `mut` is no longer valid in `~mut T`. Use inherited mutability
6165 * `fail` is no longer a keyword. Use `fail!()`
6166 * `assert` is no longer a keyword. Use `assert!()`
6167 * `log` is no longer a keyword. use `debug!`, etc.
6168 * 1-tuples may be represented as `(T,)`
6169 * Struct fields may no longer be `mut`. Use inherited mutability,
6170 `@mut T`, `core::mut` or `core::cell`
6171 * `extern mod { ... }` is no longer valid syntax for foreign
6172 function modules. Use extern blocks: `extern { ... }`
6173 * Newtype enums removed. Use tuple-structs.
6174 * Trait implementations no longer support visibility modifiers
6175 * Pattern matching over vectors improved and expanded
6176 * `const` renamed to `static` to correspond to lifetime name,
6177 and make room for future `static mut` unsafe mutable globals.
6178 * Replaced `#[deriving_eq]` with `#[deriving(Eq)]`, etc.
6179 * `Clone` implementations can be automatically generated with
6180 `#[deriving(Clone)]`
6181 * Casts to traits must use a pointer sigil, e.g. `@foo as @Bar`
6182 instead of `foo as Bar`.
6183 * Fixed length vector types are now written as `[int, .. 3]`
6184 instead of `[int * 3]`.
6185 * Fixed length vector types can express the length as a constant
6186 expression. (ex: `[int, .. GL_BUFFER_SIZE - 2]`)
6189 * Types with owned pointers or custom destructors move by default,
6190 eliminating the `move` keyword
6191 * All foreign functions are considered unsafe
6192 * &mut is now unaliasable
6193 * Writes to borrowed @mut pointers are prevented dynamically
6195 * The name of the main function can be customized using #[main]
6196 * The default type of an inferred closure is &fn instead of @fn
6197 * `use` statements may no longer be "chained" - they cannot import
6198 identifiers imported by previous `use` statements
6199 * `use` statements are crate relative, importing from the "top"
6200 of the crate by default. Paths may be prefixed with `super::`
6201 or `self::` to change the search behavior.
6202 * Method visibility is inherited from the implementation declaration
6203 * Structural records have been removed
6204 * Many more types can be used in static items, including enums
6205 'static-lifetime pointers and vectors
6206 * Pattern matching over vectors improved and expanded
6207 * Typechecking of closure types has been overhauled to
6208 improve inference and eliminate unsoundness
6209 * Macros leave scope at the end of modules, unless that module is
6210 tagged with #[macro_escape]
6213 * Added big integers to `std::bigint`
6214 * Removed `core::oldcomm` module
6215 * Added pipe-based `core::comm` module
6216 * Numeric traits have been reorganized under `core::num`
6217 * `vec::slice` finally returns a slice
6218 * `debug!` and friends don't require a format string, e.g. `debug!(Foo)`
6219 * Containers reorganized around traits in `core::container`
6220 * `core::dvec` removed, `~[T]` is a drop-in replacement
6221 * `core::send_map` renamed to `core::hashmap`
6222 * `std::map` removed; replaced with `core::hashmap`
6223 * `std::treemap` reimplemented as an owned balanced tree
6224 * `std::deque` and `std::smallintmap` reimplemented as owned containers
6225 * `core::trie` added as a fast ordered map for integer keys
6226 * Set types added to `core::hashmap`, `core::trie` and `std::treemap`
6227 * `Ord` split into `Ord` and `TotalOrd`. `Ord` is still used to
6228 overload the comparison operators, whereas `TotalOrd` is used
6229 by certain container types
6232 * Replaced the 'cargo' package manager with 'rustpkg'
6233 * Added all-purpose 'rust' tool
6234 * `rustc --test` now supports benchmarks with the `#[bench]` attribute
6235 * rustc now *attempts* to offer spelling suggestions
6236 * Improved support for ARM and Android
6237 * Preliminary MIPS backend
6238 * Improved foreign function ABI implementation for x86, x86_64
6239 * Various memory usage improvements
6240 * Rust code may be embedded in foreign code under limited circumstances
6241 * Inline assembler supported by new asm!() syntax extension.
6244 Version 0.5 (2012-12-21)
6245 ===========================
6247 * ~900 changes, numerous bugfixes
6250 * Removed `<-` move operator
6251 * Completed the transition from the `#fmt` extension syntax to `fmt!`
6252 * Removed old fixed length vector syntax - `[T]/N`
6253 * New token-based quasi-quoters, `quote_tokens!`, `quote_expr!`, etc.
6254 * Macros may now expand to items and statements
6255 * `a.b()` is always parsed as a method call, never as a field projection
6256 * `Eq` and `IterBytes` implementations can be automatically generated
6257 with `#[deriving_eq]` and `#[deriving_iter_bytes]` respectively
6258 * Removed the special crate language for `.rc` files
6259 * Function arguments may consist of any irrefutable pattern
6262 * `&` and `~` pointers may point to objects
6263 * Tuple structs - `struct Foo(Bar, Baz)`. Will replace newtype enums.
6264 * Enum variants may be structs
6265 * Destructors can be added to all nominal types with the Drop trait
6266 * Structs and nullary enum variants may be constants
6267 * Values that cannot be implicitly copied are now automatically moved
6268 without writing `move` explicitly
6269 * `&T` may now be coerced to `*T`
6270 * Coercions happen in `let` statements as well as function calls
6271 * `use` statements now take crate-relative paths
6272 * The module and type namespaces have been merged so that static
6273 method names can be resolved under the trait in which they are
6276 * Improved support for language features
6277 * Trait inheritance works in many scenarios
6278 * More support for explicit self arguments in methods - `self`, `&self`
6279 `@self`, and `~self` all generally work as expected
6280 * Static methods work in more situations
6281 * Experimental: Traits may declare default methods for the implementations
6285 * New condition handling system in `core::condition`
6286 * Timsort added to `std::sort`
6287 * New priority queue, `std::priority_queue`
6288 * Pipes for serializable types, `std::flatpipes'
6289 * Serialization overhauled to be trait-based
6290 * Expanded `getopts` definitions
6291 * Moved futures to `std`
6292 * More functions are pure now
6293 * `core::comm` renamed to `oldcomm`. Still deprecated
6294 * `rustdoc` and `cargo` are libraries now
6297 * Added a preliminary REPL, `rusti`
6298 * License changed from MIT to dual MIT/APL2
6301 Version 0.4 (2012-10-15)
6302 ==========================
6304 * ~2000 changes, numerous bugfixes
6307 * All keywords are now strict and may not be used as identifiers anywhere
6308 * Keyword removal: 'again', 'import', 'check', 'new', 'owned', 'send',
6309 'of', 'with', 'to', 'class'.
6310 * Classes are replaced with simpler structs
6311 * Explicit method self types
6312 * `ret` became `return` and `alt` became `match`
6313 * `import` is now `use`; `use is now `extern mod`
6314 * `extern mod { ... }` is now `extern { ... }`
6315 * `use mod` is the recommended way to import modules
6316 * `pub` and `priv` replace deprecated export lists
6317 * The syntax of `match` pattern arms now uses fat arrow (=>)
6318 * `main` no longer accepts an args vector; use `os::args` instead
6321 * Trait implementations are now coherent, ala Haskell typeclasses
6322 * Trait methods may be static
6323 * Argument modes are deprecated
6324 * Borrowed pointers are much more mature and recommended for use
6325 * Strings and vectors in the static region are stored in constant memory
6326 * Typestate was removed
6327 * Resolution rewritten to be more reliable
6328 * Support for 'dual-mode' data structures (freezing and thawing)
6331 * Most binary operators can now be overloaded via the traits in
6333 * `std::net::url` for representing URLs
6334 * Sendable hash maps in `core::send_map`
6335 * `core::task' gained a (currently unsafe) task-local storage API
6338 * An efficient new intertask communication primitive called the pipe,
6339 along with a number of higher-level channel types, in `core::pipes`
6340 * `std::arc`, an atomically reference counted, immutable, shared memory
6342 * `std::sync`, various exotic synchronization tools based on arcs and pipes
6343 * Futures are now based on pipes and sendable
6344 * More robust linked task failure
6345 * Improved task builder API
6348 * Improved error reporting
6349 * Preliminary JIT support
6350 * Preliminary work on precise GC
6351 * Extensive architectural improvements to rustc
6352 * Begun a transition away from buggy C++-based reflection (shape) code to
6353 Rust-based (visitor) code
6354 * All hash functions and tables converted to secure, randomized SipHash
6357 Version 0.3 (2012-07-12)
6358 ========================
6360 * ~1900 changes, numerous bugfixes
6362 * New coding conveniences
6363 * Integer-literal suffix inference
6364 * Per-item control over warnings, errors
6365 * #[cfg(windows)] and #[cfg(unix)] attributes
6366 * Documentation comments
6367 * More compact closure syntax
6368 * 'do' expressions for treating higher-order functions as
6370 * *-patterns (wildcard extended to all constructor fields)
6373 * Name resolution pass and exhaustiveness checker rewritten
6374 * Region pointers and borrow checking supersede alias
6376 * Init-ness checking is now provided by a region-based liveness
6377 pass instead of the typestate pass; same for last-use analysis
6378 * Extensive work on region pointers
6380 * Experimental new language features
6381 * Slices and fixed-size, interior-allocated vectors
6382 * #!-comments for lang versioning, shell execution
6383 * Destructors and iface implementation for classes;
6384 type-parameterized classes and class methods
6385 * 'const' type kind for types that can be used to implement
6386 shared-memory concurrency patterns
6390 * Removal of various obsolete features
6391 * Keywords: 'be', 'prove', 'syntax', 'note', 'mutable', 'bind',
6392 'crust', 'native' (now 'extern'), 'cont' (now 'again')
6394 * Constructs: do-while loops ('do' repurposed), fn binding,
6395 resources (replaced by destructors)
6397 * Compiler reorganization
6398 * Syntax-layer of compiler split into separate crate
6399 * Clang (from LLVM project) integrated into build
6400 * Typechecker split into sub-modules
6403 * New time functions
6404 * Extension methods for many built-in types
6405 * Arc: atomic-refcount read-only / exclusive-use shared cells
6406 * Par: parallel map and search routines
6407 * Extensive work on libuv interface
6408 * Much vector code moved to libraries
6409 * Syntax extensions: #line, #col, #file, #mod, #stringify,
6410 #include, #include_str, #include_bin
6413 * Cargo automatically resolves dependencies
6416 Version 0.2 (2012-03-29)
6417 =========================
6419 * >1500 changes, numerous bugfixes
6421 * New docs and doc tooling
6423 * New port: FreeBSD x86_64
6425 * Compilation model enhancements
6426 * Generics now specialized, multiply instantiated
6427 * Functions now inlined across separate crates
6429 * Scheduling, stack and threading fixes
6430 * Noticeably improved message-passing performance
6431 * Explicit schedulers
6435 * Experimental new language features
6436 * Operator overloading
6440 * Various language extensions
6441 * C-callback function types: 'crust fn ...'
6442 * Infinite-loop construct: 'loop { ... }'
6443 * Shorten 'mutable' to 'mut'
6444 * Required mutable-local qualifier: 'let mut ...'
6445 * Basic glob-exporting: 'export foo::*;'
6446 * Alt now exhaustive, 'alt check' for runtime-checked
6447 * Block-function form of 'for' loop, with 'break' and 'ret'.
6450 * AST quasi-quote syntax extension
6451 * Revived libuv interface
6452 * New modules: core::{future, iter}, std::arena
6453 * Merged per-platform std::{os*, fs*} to core::{libc, os}
6454 * Extensive cleanup, regularization in libstd, libcore
6457 Version 0.1 (2012-01-20)
6458 ===============================
6460 * Most language features work, including:
6461 * Unique pointers, unique closures, move semantics
6462 * Interface-constrained generics
6463 * Static interface dispatch
6465 * Multithread task scheduling
6466 * Typestate predicates
6467 * Failure unwinding, destructors
6468 * Pattern matching and destructuring assignment
6469 * Lightweight block-lambda syntax
6470 * Preliminary macro-by-example
6472 * Compiler works with the following configurations:
6473 * Linux: x86 and x86_64 hosts and targets
6474 * macOS: x86 and x86_64 hosts and targets
6475 * Windows: x86 hosts and targets
6477 * Cross compilation / multi-target configuration supported.
6479 * Preliminary API-documentation and package-management tools included.
6483 * Documentation is incomplete.
6485 * Performance is below intended target.
6487 * Standard library APIs are subject to extensive change, reorganization.
6489 * Language-level versioning is not yet operational - future code will