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`]
60 - [`ptr::swap_nonoverlapping`]
61 - [`slice::rsplit_mut`]
63 - [`slice::swap_with_slice`]
67 - [`cargo-metadata` now includes `authors`, `categories`, `keywords`,
68 `readme`, and `repository` fields.][cargo/5386]
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/5386]: https://github.com/rust-lang/cargo/pull/5386/
119 [cargo/5393]: https://github.com/rust-lang/cargo/pull/5393/
120 [`DoubleEndedIterator::rfind`]: https://doc.rust-lang.org/std/iter/trait.DoubleEndedIterator.html#method.rfind
121 [`DoubleEndedIterator::rfold`]: https://doc.rust-lang.org/std/iter/trait.DoubleEndedIterator.html#method.rfold
122 [`DoubleEndedIterator::try_rfold`]: https://doc.rust-lang.org/std/iter/trait.DoubleEndedIterator.html#method.try_rfold
123 [`Duration::from_micros`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.from_micros
124 [`Duration::from_nanos`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.from_nanos
125 [`Duration::subsec_micros`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.subsec_micros
126 [`Duration::subsec_millis`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.subsec_millis
127 [`HashMap::remove_entry`]: https://doc.rust-lang.org/std/collections/struct.HashMap.html#method.remove_entry
128 [`Iterator::try_fold`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.try_fold
129 [`Iterator::try_for_each`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.try_for_each
130 [`NonNull::cast`]: https://doc.rust-lang.org/std/ptr/struct.NonNull.html#method.cast
131 [`Option::filter`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.filter
132 [`String::replace_range`]: https://doc.rust-lang.org/std/string/struct.String.html#method.replace_range
133 [`Take::set_limit`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.set_limit
134 [`hint::unreachable_unchecked`]: https://doc.rust-lang.org/std/hint/fn.unreachable_unchecked.html
135 [`os::unix::process::parent_id`]: https://doc.rust-lang.org/std/os/unix/process/fn.parent_id.html
136 [`process::id`]: https://doc.rust-lang.org/std/process/fn.id.html
137 [`ptr::swap_nonoverlapping`]: https://doc.rust-lang.org/std/ptr/fn.swap_nonoverlapping.html
138 [`slice::rsplit_mut`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rsplit_mut
139 [`slice::rsplit`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rsplit
140 [`slice::swap_with_slice`]: https://doc.rust-lang.org/std/primitive.slice.html#method.swap_with_slice
141 [`arch::x86_64`]: https://doc.rust-lang.org/std/arch/x86_64/index.html
142 [`arch::x86`]: https://doc.rust-lang.org/std/arch/x86/index.html
143 [“The Rustc book”]: https://doc.rust-lang.org/rustc
146 Version 1.26.2 (2018-06-05)
147 ==========================
152 - [The borrow checker was fixed to avoid unsoundness when using match ergonomics][51117]
154 [51117]: https://github.com/rust-lang/rust/issues/51117
157 Version 1.26.1 (2018-05-29)
158 ==========================
163 - [RLS now works on Windows][50646]
164 - [Rustfmt stopped badly formatting text in some cases][rustfmt/2695]
170 - [`fn main() -> impl Trait` no longer works for non-Termination
172 This reverts an accidental stabilization.
173 - [`NaN > NaN` no longer returns true in const-fn contexts][50812]
174 - [Prohibit using turbofish for `impl Trait` in method arguments][50950]
176 [50646]: https://github.com/rust-lang/rust/issues/50646
177 [50656]: https://github.com/rust-lang/rust/pull/50656
178 [50812]: https://github.com/rust-lang/rust/pull/50812
179 [50950]: https://github.com/rust-lang/rust/issues/50950
180 [rustfmt/2695]: https://github.com/rust-lang-nursery/rustfmt/issues/2695
182 Version 1.26.0 (2018-05-10)
183 ==========================
187 - [Closures now implement `Copy` and/or `Clone` if all captured variables
188 implement either or both traits.][49299]
189 - [The inclusive range syntax e.g. `for x in 0..=10` is now stable.][47813]
190 - [Stablise `'_`. The underscore lifetime can be used anywhere where a
191 lifetime can be elided.][49458]
192 - [`impl Trait` is now stable allowing you to have abstract types in returns
193 or in function parameters.][49255] e.g. `fn foo() -> impl Iterator<Item=u8>` or
194 `fn open(path: impl AsRef<Path>)`.
195 - [Pattern matching will now automatically apply dereferences.][49394]
196 - [128-bit integers in the form of `u128` and `i128` are now stable.][49101]
197 - [`main` can now return `Result<(), E: Debug>`][49162] in addition to `()`.
198 - [A lot of operations are now available in a const context.][46882] E.g. You
199 can now index into constant arrays, reference and dereference into constants,
200 and use Tuple struct constructors.
201 - [Fixed entry slice patterns are now stable.][48516] e.g.
203 let points = [1, 2, 3, 4];
205 [1, 2, 3, 4] => println!("All points were sequential."),
206 _ => println!("Not all points were sequential."),
213 - [LLD is now used as the default linker for `wasm32-unknown-unknown`.][48125]
214 - [Fixed exponential projection complexity on nested types.][48296]
215 This can provide up to a ~12% reduction in compile times for certain crates.
216 - [Added the `--remap-path-prefix` option to rustc.][48359] Allowing you
217 to remap path prefixes outputted by the compiler.
218 - [Added `powerpc-unknown-netbsd` target.][48281]
222 - [Implemented `From<u16> for usize` & `From<{u8, i16}> for isize`.][49305]
223 - [Added hexadecimal formatting for integers with fmt::Debug][48978]
224 e.g. `assert!(format!("{:02x?}", b"Foo\0") == "[46, 6f, 6f, 00]")`
225 - [Implemented `Default, Hash` for `cmp::Reverse`.][48628]
226 - [Optimized `str::repeat` being 8x faster in large cases.][48657]
227 - [`ascii::escape_default` is now available in libcore.][48735]
228 - [Trailing commas are now supported in std and core macros.][48056]
229 - [Implemented `Copy, Clone` for `cmp::Reverse`][47379]
230 - [Implemented `Clone` for `char::{ToLowercase, ToUppercase}`.][48629]
235 - [`*const T::copy_to_nonoverlapping`]
236 - [`*const T::copy_to`]
237 - [`*const T::read_unaligned`]
238 - [`*const T::read_volatile`]
241 - [`*const T::wrapping_add`]
242 - [`*const T::wrapping_sub`]
244 - [`*mut T::copy_to_nonoverlapping`]
245 - [`*mut T::copy_to`]
246 - [`*mut T::read_unaligned`]
247 - [`*mut T::read_volatile`]
249 - [`*mut T::replace`]
252 - [`*mut T::wrapping_add`]
253 - [`*mut T::wrapping_sub`]
254 - [`*mut T::write_bytes`]
255 - [`*mut T::write_unaligned`]
256 - [`*mut T::write_volatile`]
259 - [`FromUtf8Error::as_bytes`]
260 - [`LocalKey::try_with`]
262 - [`btree_map::Entry::and_modify`]
263 - [`fs::read_to_string`]
266 - [`hash_map::Entry::and_modify`]
267 - [`iter::FusedIterator`]
268 - [`ops::RangeInclusive`]
269 - [`ops::RangeToInclusive`]
271 - [`slice::rotate_left`]
272 - [`slice::rotate_right`]
278 - [Cargo will now output path to custom commands when `-v` is
279 passed with `--list`][cargo/5041]
280 - [The Cargo binary version is now the same as the Rust version][cargo/5083]
284 - [The second edition of "The Rust Programming Language" book is now recommended
285 over the first.][48404]
290 - [aliasing a `Fn` trait as `dyn` no longer works.][48481] E.g. the following
291 syntax is now invalid.
293 use std::ops::Fn as dyn;
294 fn g(_: Box<dyn(std::fmt::Debug)>) {}
296 - [The result of dereferences are no longer promoted to `'static`.][47408]
300 const PAIR: &(i32, i32) = &(0, 1);
301 let _reversed_pair: &'static _ = &(PAIR.1, PAIR.0); // Doesn't work
304 - [Deprecate `AsciiExt` trait in favor of inherent methods.][49109]
305 - [`".e0"` will now no longer parse as `0.0` and will instead cause
307 - [Removed hoedown from rustdoc.][48274]
308 - [Bounds on higher-kinded lifetimes a hard error.][48326]
310 [46882]: https://github.com/rust-lang/rust/pull/46882
311 [47379]: https://github.com/rust-lang/rust/pull/47379
312 [47408]: https://github.com/rust-lang/rust/pull/47408
313 [47813]: https://github.com/rust-lang/rust/pull/47813
314 [48056]: https://github.com/rust-lang/rust/pull/48056
315 [48125]: https://github.com/rust-lang/rust/pull/48125
316 [48166]: https://github.com/rust-lang/rust/pull/48166
317 [48235]: https://github.com/rust-lang/rust/pull/48235
318 [48274]: https://github.com/rust-lang/rust/pull/48274
319 [48281]: https://github.com/rust-lang/rust/pull/48281
320 [48296]: https://github.com/rust-lang/rust/pull/48296
321 [48326]: https://github.com/rust-lang/rust/pull/48326
322 [48359]: https://github.com/rust-lang/rust/pull/48359
323 [48404]: https://github.com/rust-lang/rust/pull/48404
324 [48481]: https://github.com/rust-lang/rust/pull/48481
325 [48516]: https://github.com/rust-lang/rust/pull/48516
326 [48628]: https://github.com/rust-lang/rust/pull/48628
327 [48629]: https://github.com/rust-lang/rust/pull/48629
328 [48657]: https://github.com/rust-lang/rust/pull/48657
329 [48735]: https://github.com/rust-lang/rust/pull/48735
330 [48978]: https://github.com/rust-lang/rust/pull/48978
331 [49101]: https://github.com/rust-lang/rust/pull/49101
332 [49109]: https://github.com/rust-lang/rust/pull/49109
333 [49121]: https://github.com/rust-lang/rust/pull/49121
334 [49162]: https://github.com/rust-lang/rust/pull/49162
335 [49184]: https://github.com/rust-lang/rust/pull/49184
336 [49234]: https://github.com/rust-lang/rust/pull/49234
337 [49255]: https://github.com/rust-lang/rust/pull/49255
338 [49299]: https://github.com/rust-lang/rust/pull/49299
339 [49305]: https://github.com/rust-lang/rust/pull/49305
340 [49394]: https://github.com/rust-lang/rust/pull/49394
341 [49458]: https://github.com/rust-lang/rust/pull/49458
342 [`*const T::add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.add
343 [`*const T::copy_to_nonoverlapping`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to_nonoverlapping
344 [`*const T::copy_to`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to
345 [`*const T::read_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_unaligned
346 [`*const T::read_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_volatile
347 [`*const T::read`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read
348 [`*const T::sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.sub
349 [`*const T::wrapping_add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_add
350 [`*const T::wrapping_sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_sub
351 [`*mut T::add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.add-1
352 [`*mut T::copy_to_nonoverlapping`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to_nonoverlapping-1
353 [`*mut T::copy_to`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to-1
354 [`*mut T::read_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_unaligned-1
355 [`*mut T::read_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_volatile-1
356 [`*mut T::read`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read-1
357 [`*mut T::replace`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.replace
358 [`*mut T::sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.sub-1
359 [`*mut T::swap`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.swap
360 [`*mut T::wrapping_add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_add-1
361 [`*mut T::wrapping_sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_sub-1
362 [`*mut T::write_bytes`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_bytes
363 [`*mut T::write_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_unaligned
364 [`*mut T::write_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_volatile
365 [`*mut T::write`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write
366 [`Box::leak`]: https://doc.rust-lang.org/std/boxed/struct.Box.html#method.leak
367 [`FromUtf8Error::as_bytes`]: https://doc.rust-lang.org/std/string/struct.FromUtf8Error.html#method.as_bytes
368 [`LocalKey::try_with`]: https://doc.rust-lang.org/std/thread/struct.LocalKey.html#method.try_with
369 [`Option::cloned`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.cloned
370 [`btree_map::Entry::and_modify`]: https://doc.rust-lang.org/std/collections/btree_map/enum.Entry.html#method.and_modify
371 [`fs::read_to_string`]: https://doc.rust-lang.org/std/fs/fn.read_to_string.html
372 [`fs::read`]: https://doc.rust-lang.org/std/fs/fn.read.html
373 [`fs::write`]: https://doc.rust-lang.org/std/fs/fn.write.html
374 [`hash_map::Entry::and_modify`]: https://doc.rust-lang.org/std/collections/hash_map/enum.Entry.html#method.and_modify
375 [`iter::FusedIterator`]: https://doc.rust-lang.org/std/iter/trait.FusedIterator.html
376 [`ops::RangeInclusive`]: https://doc.rust-lang.org/std/ops/struct.RangeInclusive.html
377 [`ops::RangeToInclusive`]: https://doc.rust-lang.org/std/ops/struct.RangeToInclusive.html
378 [`process::id`]: https://doc.rust-lang.org/std/process/fn.id.html
379 [`slice::rotate_left`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rotate_left
380 [`slice::rotate_right`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rotate_right
381 [`String::retain`]: https://doc.rust-lang.org/std/string/struct.String.html#method.retain
382 [cargo/5041]: https://github.com/rust-lang/cargo/pull/5041
383 [cargo/5083]: https://github.com/rust-lang/cargo/pull/5083
386 Version 1.25.0 (2018-03-29)
387 ==========================
391 - [Stabilised `#[repr(align(x))]`.][47006] [RFC 1358]
392 - [You can now use nested groups of imports.][47948]
393 e.g. `use std::{fs::File, io::Read, path::{Path, PathBuf}};`
394 - [You can now have `|` at the start of a match arm.][47947] e.g.
402 | Foo::B => println!("AB"),
403 | Foo::C => println!("C"),
410 - [Upgraded to LLVM 6.][47828]
411 - [Added `-C lto=val` option.][47521]
412 - [Added `i586-unknown-linux-musl` target][47282]
416 - [Impl Send for `process::Command` on Unix.][47760]
417 - [Impl PartialEq and Eq for `ParseCharError`.][47790]
418 - [`UnsafeCell::into_inner` is now safe.][47204]
419 - [Implement libstd for CloudABI.][47268]
420 - [`Float::{from_bits, to_bits}` is now available in libcore.][46931]
421 - [Implement `AsRef<Path>` for Component][46985]
422 - [Implemented `Write` for `Cursor<&mut Vec<u8>>`][46830]
423 - [Moved `Duration` to libcore.][46666]
427 - [`Location::column`]
430 The following functions can now be used in a constant expression.
431 eg. `static MINUTE: Duration = Duration::from_secs(60);`
432 - [`Duration::new`][47300]
433 - [`Duration::from_secs`][47300]
434 - [`Duration::from_millis`][47300]
438 - [`cargo new` no longer removes `rust` or `rs` prefixs/suffixs.][cargo/5013]
439 - [`cargo new` now defaults to creating a binary crate, instead of a
440 library crate.][cargo/5029]
444 - [Rust by example is now shipped with new releases][46196]
448 - [Deprecated `net::lookup_host`.][47510]
449 - [`rustdoc` has switched to pulldown as the default markdown renderer.][47398]
450 - The borrow checker was sometimes incorrectly permitting overlapping borrows
451 around indexing operations (see [#47349][47349]). This has been fixed (which also
452 enabled some correct code that used to cause errors (e.g. [#33903][33903] and [#46095][46095]).
453 - [Removed deprecated unstable attribute `#[simd]`.][47251]
455 [33903]: https://github.com/rust-lang/rust/pull/33903
456 [47947]: https://github.com/rust-lang/rust/pull/47947
457 [47948]: https://github.com/rust-lang/rust/pull/47948
458 [47760]: https://github.com/rust-lang/rust/pull/47760
459 [47790]: https://github.com/rust-lang/rust/pull/47790
460 [47828]: https://github.com/rust-lang/rust/pull/47828
461 [47398]: https://github.com/rust-lang/rust/pull/47398
462 [47510]: https://github.com/rust-lang/rust/pull/47510
463 [47521]: https://github.com/rust-lang/rust/pull/47521
464 [47204]: https://github.com/rust-lang/rust/pull/47204
465 [47251]: https://github.com/rust-lang/rust/pull/47251
466 [47268]: https://github.com/rust-lang/rust/pull/47268
467 [47282]: https://github.com/rust-lang/rust/pull/47282
468 [47300]: https://github.com/rust-lang/rust/pull/47300
469 [47349]: https://github.com/rust-lang/rust/pull/47349
470 [46931]: https://github.com/rust-lang/rust/pull/46931
471 [46985]: https://github.com/rust-lang/rust/pull/46985
472 [47006]: https://github.com/rust-lang/rust/pull/47006
473 [46830]: https://github.com/rust-lang/rust/pull/46830
474 [46095]: https://github.com/rust-lang/rust/pull/46095
475 [46666]: https://github.com/rust-lang/rust/pull/46666
476 [46196]: https://github.com/rust-lang/rust/pull/46196
477 [cargo/5013]: https://github.com/rust-lang/cargo/pull/5013
478 [cargo/5029]: https://github.com/rust-lang/cargo/pull/5029
479 [RFC 1358]: https://github.com/rust-lang/rfcs/pull/1358
480 [`Location::column`]: https://doc.rust-lang.org/std/panic/struct.Location.html#method.column
481 [`ptr::NonNull`]: https://doc.rust-lang.org/std/ptr/struct.NonNull.html
484 Version 1.24.1 (2018-03-01)
485 ==========================
487 - [Do not abort when unwinding through FFI][48251]
488 - [Emit UTF-16 files for linker arguments on Windows][48318]
489 - [Make the error index generator work again][48308]
490 - [Cargo will warn on Windows 7 if an update is needed][cargo/5069].
492 [48251]: https://github.com/rust-lang/rust/issues/48251
493 [48308]: https://github.com/rust-lang/rust/issues/48308
494 [48318]: https://github.com/rust-lang/rust/issues/48318
495 [cargo/5069]: https://github.com/rust-lang/cargo/pull/5069
498 Version 1.24.0 (2018-02-15)
499 ==========================
503 - [External `sysv64` ffi is now available.][46528]
504 eg. `extern "sysv64" fn foo () {}`
508 - [rustc now uses 16 codegen units by default for release builds.][46910]
509 For the fastest builds, utilize `codegen-units=1`.
510 - [Added `armv4t-unknown-linux-gnueabi` target.][47018]
511 - [Add `aarch64-unknown-openbsd` support][46760]
515 - [`str::find::<char>` now uses memchr.][46735] This should lead to a 10x
516 improvement in performance in the majority of cases.
517 - [`OsStr`'s `Debug` implementation is now lossless and consistent
518 with Windows.][46798]
519 - [`time::{SystemTime, Instant}` now implement `Hash`.][46828]
520 - [impl `From<bool>` for `AtomicBool`][46293]
521 - [impl `From<{CString, &CStr}>` for `{Arc<CStr>, Rc<CStr>}`][45990]
522 - [impl `From<{OsString, &OsStr}>` for `{Arc<OsStr>, Rc<OsStr>}`][45990]
523 - [impl `From<{PathBuf, &Path}>` for `{Arc<Path>, Rc<Path>}`][45990]
524 - [float::from_bits now just uses transmute.][46012] This provides
525 some optimisations from LLVM.
526 - [Copied `AsciiExt` methods onto `char`][46077]
527 - [Remove `T: Sized` requirement on `ptr::is_null()`][46094]
528 - [impl `From<RecvError>` for `{TryRecvError, RecvTimeoutError}`][45506]
529 - [Optimised `f32::{min, max}` to generate more efficient x86 assembly][47080]
530 - [`[u8]::contains` now uses memchr which provides a 3x speed improvement][46713]
534 - [`RefCell::replace`]
536 - [`atomic::spin_loop_hint`]
538 The following functions can now be used in a constant expression.
539 eg. `let buffer: [u8; size_of::<usize>()];`, `static COUNTER: AtomicUsize = AtomicUsize::new(1);`
541 - [`AtomicBool::new`][46287]
542 - [`AtomicUsize::new`][46287]
543 - [`AtomicIsize::new`][46287]
544 - [`AtomicPtr::new`][46287]
545 - [`Cell::new`][46287]
546 - [`{integer}::min_value`][46287]
547 - [`{integer}::max_value`][46287]
548 - [`mem::size_of`][46287]
549 - [`mem::align_of`][46287]
550 - [`ptr::null`][46287]
551 - [`ptr::null_mut`][46287]
552 - [`RefCell::new`][46287]
553 - [`UnsafeCell::new`][46287]
557 - [Added a `workspace.default-members` config that
558 overrides implied `--all` in virtual workspaces.][cargo/4743]
559 - [Enable incremental by default on development builds.][cargo/4817] Also added
560 configuration keys to `Cargo.toml` and `.cargo/config` to disable on a
561 per-project or global basis respectively.
568 - [Floating point types `Debug` impl now always prints a decimal point.][46831]
569 - [`Ipv6Addr` now rejects superfluous `::`'s in IPv6 addresses][46671] This is
570 in accordance with IETF RFC 4291 §2.2.
571 - [Unwinding will no longer go past FFI boundaries, and will instead abort.][46833]
572 - [`Formatter::flags` method is now deprecated.][46284] The `sign_plus`,
573 `sign_minus`, `alternate`, and `sign_aware_zero_pad` should be used instead.
574 - [Leading zeros in tuple struct members is now an error][47084]
575 - [`column!()` macro is one-based instead of zero-based][46977]
576 - [`fmt::Arguments` can no longer be shared across threads][45198]
577 - [Access to `#[repr(packed)]` struct fields is now unsafe][44884]
578 - [Cargo sets a different working directory for the compiler][cargo/4788]
580 [44884]: https://github.com/rust-lang/rust/pull/44884
581 [45198]: https://github.com/rust-lang/rust/pull/45198
582 [45506]: https://github.com/rust-lang/rust/pull/45506
583 [45904]: https://github.com/rust-lang/rust/pull/45904
584 [45990]: https://github.com/rust-lang/rust/pull/45990
585 [46012]: https://github.com/rust-lang/rust/pull/46012
586 [46077]: https://github.com/rust-lang/rust/pull/46077
587 [46094]: https://github.com/rust-lang/rust/pull/46094
588 [46284]: https://github.com/rust-lang/rust/pull/46284
589 [46287]: https://github.com/rust-lang/rust/pull/46287
590 [46293]: https://github.com/rust-lang/rust/pull/46293
591 [46528]: https://github.com/rust-lang/rust/pull/46528
592 [46671]: https://github.com/rust-lang/rust/pull/46671
593 [46713]: https://github.com/rust-lang/rust/pull/46713
594 [46735]: https://github.com/rust-lang/rust/pull/46735
595 [46749]: https://github.com/rust-lang/rust/pull/46749
596 [46760]: https://github.com/rust-lang/rust/pull/46760
597 [46798]: https://github.com/rust-lang/rust/pull/46798
598 [46828]: https://github.com/rust-lang/rust/pull/46828
599 [46831]: https://github.com/rust-lang/rust/pull/46831
600 [46833]: https://github.com/rust-lang/rust/pull/46833
601 [46910]: https://github.com/rust-lang/rust/pull/46910
602 [46977]: https://github.com/rust-lang/rust/pull/46977
603 [47018]: https://github.com/rust-lang/rust/pull/47018
604 [47080]: https://github.com/rust-lang/rust/pull/47080
605 [47084]: https://github.com/rust-lang/rust/pull/47084
606 [cargo/4743]: https://github.com/rust-lang/cargo/pull/4743
607 [cargo/4788]: https://github.com/rust-lang/cargo/pull/4788
608 [cargo/4817]: https://github.com/rust-lang/cargo/pull/4817
609 [`RefCell::replace`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.replace
610 [`RefCell::swap`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.swap
611 [`atomic::spin_loop_hint`]: https://doc.rust-lang.org/std/sync/atomic/fn.spin_loop_hint.html
614 Version 1.23.0 (2018-01-04)
615 ==========================
619 - [Arbitrary `auto` traits are now permitted in trait objects.][45772]
620 - [rustc now uses subtyping on the left hand side of binary operations.][45435]
621 Which should fix some confusing errors in some operations.
625 - [Enabled `TrapUnreachable` in LLVM which should mitigate the impact of
626 undefined behaviour.][45920]
627 - [rustc now suggests renaming import if names clash.][45660]
628 - [Display errors/warnings correctly when there are zero-width or
629 wide characters.][45711]
630 - [rustc now avoids unnecessary copies of arguments that are
631 simple bindings][45380] This should improve memory usage on average by 5-10%.
632 - [Updated musl used to build musl rustc to 1.1.17][45393]
636 - [Allow a trailing comma in `assert_eq/ne` macro][45887]
637 - [Implement Hash for raw pointers to unsized types][45483]
638 - [impl `From<*mut T>` for `AtomicPtr<T>`][45610]
639 - [impl `From<usize/isize>` for `AtomicUsize/AtomicIsize`.][45610]
640 - [Removed the `T: Sync` requirement for `RwLock<T>: Send`][45267]
641 - [Removed `T: Sized` requirement for `{<*const T>, <*mut T>}::as_ref`
642 and `<*mut T>::as_mut`][44932]
643 - [Optimized `Thread::{park, unpark}` implementation][45524]
644 - [Improved `SliceExt::binary_search` performance.][45333]
645 - [impl `FromIterator<()>` for `()`][45379]
646 - [Copied `AsciiExt` trait methods to primitive types.][44042] Use of `AsciiExt`
654 - [Cargo now supports uninstallation of multiple packages][cargo/4561]
655 eg. `cargo uninstall foo bar` uninstalls `foo` and `bar`.
656 - [Added unit test checking to `cargo check`][cargo/4592]
657 - [Cargo now lets you install a specific version
658 using `cargo install --version`][cargo/4637]
662 - [Releases now ship with the Cargo book documentation.][45692]
663 - [rustdoc now prints rendering warnings on every run.][45324]
667 - [Changes have been made to type equality to make it more correct,
668 in rare cases this could break some code.][45853] [Tracking issue for
669 further information][45852]
670 - [`char::escape_debug` now uses Unicode 10 over 9.][45571]
671 - [Upgraded Android SDK to 27, and NDK to r15c.][45580] This drops support for
672 Android 9, the minimum supported version is Android 14.
673 - [Bumped the minimum LLVM to 3.9][45326]
675 [44042]: https://github.com/rust-lang/rust/pull/44042
676 [44932]: https://github.com/rust-lang/rust/pull/44932
677 [45267]: https://github.com/rust-lang/rust/pull/45267
678 [45324]: https://github.com/rust-lang/rust/pull/45324
679 [45326]: https://github.com/rust-lang/rust/pull/45326
680 [45333]: https://github.com/rust-lang/rust/pull/45333
681 [45379]: https://github.com/rust-lang/rust/pull/45379
682 [45380]: https://github.com/rust-lang/rust/pull/45380
683 [45393]: https://github.com/rust-lang/rust/pull/45393
684 [45435]: https://github.com/rust-lang/rust/pull/45435
685 [45483]: https://github.com/rust-lang/rust/pull/45483
686 [45524]: https://github.com/rust-lang/rust/pull/45524
687 [45571]: https://github.com/rust-lang/rust/pull/45571
688 [45580]: https://github.com/rust-lang/rust/pull/45580
689 [45610]: https://github.com/rust-lang/rust/pull/45610
690 [45660]: https://github.com/rust-lang/rust/pull/45660
691 [45692]: https://github.com/rust-lang/rust/pull/45692
692 [45711]: https://github.com/rust-lang/rust/pull/45711
693 [45772]: https://github.com/rust-lang/rust/pull/45772
694 [45852]: https://github.com/rust-lang/rust/issues/45852
695 [45853]: https://github.com/rust-lang/rust/pull/45853
696 [45887]: https://github.com/rust-lang/rust/pull/45887
697 [45920]: https://github.com/rust-lang/rust/pull/45920
698 [cargo/4561]: https://github.com/rust-lang/cargo/pull/4561
699 [cargo/4592]: https://github.com/rust-lang/cargo/pull/4592
700 [cargo/4637]: https://github.com/rust-lang/cargo/pull/4637
703 Version 1.22.1 (2017-11-22)
704 ==========================
706 - [Update Cargo to fix an issue with macOS 10.13 "High Sierra"][46183]
708 [46183]: https://github.com/rust-lang/rust/pull/46183
710 Version 1.22.0 (2017-11-22)
711 ==========================
715 - [`non_snake_case` lint now allows extern no-mangle functions][44966]
716 - [Now accepts underscores in unicode escapes][43716]
717 - [`T op= &T` now works for numeric types.][44287] eg. `let mut x = 2; x += &8;`
718 - [types that impl `Drop` are now allowed in `const` and `static` types][44456]
722 - [rustc now defaults to having 16 codegen units at debug on supported platforms.][45064]
723 - [rustc will no longer inline in codegen units when compiling for debug][45075]
724 This should decrease compile times for debug builds.
725 - [strict memory alignment now enabled on ARMv6][45094]
726 - [Remove support for the PNaCl target `le32-unknown-nacl`][45041]
730 - [Allow atomic operations up to 32 bits
731 on `armv5te_unknown_linux_gnueabi`][44978]
732 - [`Box<Error>` now impls `From<Cow<str>>`][44466]
733 - [`std::mem::Discriminant` is now guaranteed to be `Send + Sync`][45095]
734 - [`fs::copy` now returns the length of the main stream on NTFS.][44895]
735 - [Properly detect overflow in `Instant += Duration`.][44220]
736 - [impl `Hasher` for `{&mut Hasher, Box<Hasher>}`][44015]
737 - [impl `fmt::Debug` for `SplitWhitespace`.][44303]
738 - [`Option<T>` now impls `Try`][42526] This allows for using `?` with `Option` types.
745 - [Cargo will now build multi file examples in subdirectories of the `examples`
746 folder that have a `main.rs` file.][cargo/4496]
747 - [Changed `[root]` to `[package]` in `Cargo.lock`][cargo/4571] Packages with
748 the old format will continue to work and can be updated with `cargo update`.
749 - [Now supports vendoring git repositories][cargo/3992]
753 - [`libbacktrace` is now available on Apple platforms.][44251]
754 - [Stabilised the `compile_fail` attribute for code fences in doc-comments.][43949]
755 This now lets you specify that a given code example will fail to compile.
759 - [The minimum Android version that rustc can build for has been bumped
760 to `4.0` from `2.3`][45656]
761 - [Allowing `T op= &T` for numeric types has broken some type
762 inference cases][45480]
765 [42526]: https://github.com/rust-lang/rust/pull/42526
766 [43017]: https://github.com/rust-lang/rust/pull/43017
767 [43716]: https://github.com/rust-lang/rust/pull/43716
768 [43949]: https://github.com/rust-lang/rust/pull/43949
769 [44015]: https://github.com/rust-lang/rust/pull/44015
770 [44220]: https://github.com/rust-lang/rust/pull/44220
771 [44251]: https://github.com/rust-lang/rust/pull/44251
772 [44287]: https://github.com/rust-lang/rust/pull/44287
773 [44303]: https://github.com/rust-lang/rust/pull/44303
774 [44456]: https://github.com/rust-lang/rust/pull/44456
775 [44466]: https://github.com/rust-lang/rust/pull/44466
776 [44895]: https://github.com/rust-lang/rust/pull/44895
777 [44966]: https://github.com/rust-lang/rust/pull/44966
778 [44978]: https://github.com/rust-lang/rust/pull/44978
779 [45041]: https://github.com/rust-lang/rust/pull/45041
780 [45064]: https://github.com/rust-lang/rust/pull/45064
781 [45075]: https://github.com/rust-lang/rust/pull/45075
782 [45094]: https://github.com/rust-lang/rust/pull/45094
783 [45095]: https://github.com/rust-lang/rust/pull/45095
784 [45480]: https://github.com/rust-lang/rust/issues/45480
785 [45656]: https://github.com/rust-lang/rust/pull/45656
786 [cargo/3992]: https://github.com/rust-lang/cargo/pull/3992
787 [cargo/4496]: https://github.com/rust-lang/cargo/pull/4496
788 [cargo/4571]: https://github.com/rust-lang/cargo/pull/4571
795 Version 1.21.0 (2017-10-12)
796 ==========================
800 - [You can now use static references for literals.][43838]
804 let x: &'static u32 = &0;
807 - [Relaxed path syntax. Optional `::` before `<` is now allowed in all contexts.][43540]
810 my_macro!(Vec<i32>::new); // Always worked
811 my_macro!(Vec::<i32>::new); // Now works
816 - [Upgraded jemalloc to 4.5.0][43911]
817 - [Enabled unwinding panics on Redox][43917]
818 - [Now runs LLVM in parallel during translation phase.][43506]
819 This should reduce peak memory usage.
823 - [Generate builtin impls for `Clone` for all arrays and tuples that
824 are `T: Clone`][43690]
825 - [`Stdin`, `Stdout`, and `Stderr` now implement `AsRawFd`.][43459]
826 - [`Rc` and `Arc` now implement `From<&[T]> where T: Clone`, `From<str>`,
827 `From<String>`, `From<Box<T>> where T: ?Sized`, and `From<Vec<T>>`.][42565]
832 [`std::mem::discriminant`]
836 - [You can now call `cargo install` with multiple package names][cargo/4216]
837 - [Cargo commands inside a virtual workspace will now implicitly
838 pass `--all`][cargo/4335]
839 - [Added a `[patch]` section to `Cargo.toml` to handle
840 prepublication dependencies][cargo/4123] [RFC 1969]
841 - [`include` & `exclude` fields in `Cargo.toml` now accept gitignore
842 like patterns][cargo/4270]
843 - [Added the `--all-targets` option][cargo/4400]
844 - [Using required dependencies as a feature is now deprecated and emits
845 a warning][cargo/4364]
850 - [Cargo docs are moving][43916]
851 to [doc.rust-lang.org/cargo](https://doc.rust-lang.org/cargo)
852 - [The rustdoc book is now available][43863]
853 at [doc.rust-lang.org/rustdoc](https://doc.rust-lang.org/rustdoc)
854 - [Added a preview of RLS has been made available through rustup][44204]
855 Install with `rustup component add rls-preview`
856 - [`std::os` documentation for Unix, Linux, and Windows now appears on doc.rust-lang.org][43348]
857 Previously only showed `std::os::unix`.
861 - [Changes in method matching against higher-ranked types][43880] This may cause
862 breakage in subtyping corner cases. [A more in-depth explanation is available.][info/43880]
863 - [rustc's JSON error output's byte position start at top of file.][42973]
864 Was previously relative to the rustc's internal `CodeMap` struct which
865 required the unstable library `libsyntax` to correctly use.
866 - [`unused_results` lint no longer ignores booleans][43728]
868 [42565]: https://github.com/rust-lang/rust/pull/42565
869 [42973]: https://github.com/rust-lang/rust/pull/42973
870 [43348]: https://github.com/rust-lang/rust/pull/43348
871 [43459]: https://github.com/rust-lang/rust/pull/43459
872 [43506]: https://github.com/rust-lang/rust/pull/43506
873 [43540]: https://github.com/rust-lang/rust/pull/43540
874 [43690]: https://github.com/rust-lang/rust/pull/43690
875 [43728]: https://github.com/rust-lang/rust/pull/43728
876 [43838]: https://github.com/rust-lang/rust/pull/43838
877 [43863]: https://github.com/rust-lang/rust/pull/43863
878 [43880]: https://github.com/rust-lang/rust/pull/43880
879 [43911]: https://github.com/rust-lang/rust/pull/43911
880 [43916]: https://github.com/rust-lang/rust/pull/43916
881 [43917]: https://github.com/rust-lang/rust/pull/43917
882 [44204]: https://github.com/rust-lang/rust/pull/44204
883 [cargo/4123]: https://github.com/rust-lang/cargo/pull/4123
884 [cargo/4216]: https://github.com/rust-lang/cargo/pull/4216
885 [cargo/4270]: https://github.com/rust-lang/cargo/pull/4270
886 [cargo/4335]: https://github.com/rust-lang/cargo/pull/4335
887 [cargo/4364]: https://github.com/rust-lang/cargo/pull/4364
888 [cargo/4400]: https://github.com/rust-lang/cargo/pull/4400
889 [RFC 1969]: https://github.com/rust-lang/rfcs/pull/1969
890 [info/43880]: https://github.com/rust-lang/rust/issues/44224#issuecomment-330058902
891 [`std::mem::discriminant`]: https://doc.rust-lang.org/std/mem/fn.discriminant.html
893 Version 1.20.0 (2017-08-31)
894 ===========================
898 - [Associated constants are now stabilised.][42809]
899 - [A lot of macro bugs are now fixed.][42913]
904 - [Struct fields are now properly coerced to the expected field type.][42807]
905 - [Enabled wasm LLVM backend][42571] WASM can now be built with the
906 `wasm32-experimental-emscripten` target.
907 - [Changed some of the error messages to be more helpful.][42033]
908 - [Add support for RELRO(RELocation Read-Only) for platforms that support
910 - [rustc now reports the total number of errors on compilation failure][43015]
911 previously this was only the number of errors in the pass that failed.
912 - [Expansion in rustc has been sped up 29x.][42533]
913 - [added `msp430-none-elf` target.][43099]
914 - [rustc will now suggest one-argument enum variant to fix type mismatch when
916 - [Fixes backtraces on Redox][43228]
917 - [rustc now identifies different versions of same crate when absolute paths of
918 different types match in an error message.][42826]
924 - [Relaxed Debug constraints on `{HashMap,BTreeMap}::{Keys,Values}`.][42854]
925 - [Impl `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Debug`, `Hash` for unsized
927 - [Impl `fmt::{Display, Debug}` for `Ref`, `RefMut`, `MutexGuard`,
928 `RwLockReadGuard`, `RwLockWriteGuard`][42822]
929 - [Impl `Clone` for `DefaultHasher`.][42799]
930 - [Impl `Sync` for `SyncSender`.][42397]
931 - [Impl `FromStr` for `char`][42271]
932 - [Fixed how `{f32, f64}::{is_sign_negative, is_sign_positive}` handles
934 - [allow messages in the `unimplemented!()` macro.][42155]
935 ie. `unimplemented!("Waiting for 1.21 to be stable")`
936 - [`pub(restricted)` is now supported in the `thread_local!` macro.][43185]
937 - [Upgrade to Unicode 10.0.0][42999]
938 - [Reimplemented `{f32, f64}::{min, max}` in Rust instead of using CMath.][42430]
939 - [Skip the main thread's manual stack guard on Linux][43072]
940 - [Iterator::nth for `ops::{Range, RangeFrom}` is now done in O(1) time][43077]
941 - [`#[repr(align(N))]` attribute max number is now 2^31 - 1.][43097] This was
943 - [`{OsStr, Path}::Display` now avoids allocations where possible][42613]
948 - [`CStr::into_c_string`]
949 - [`CString::as_c_str`]
950 - [`CString::into_boxed_c_str`]
953 - [`Chain::into_inner`]
954 - [`Option::get_or_insert_with`]
955 - [`Option::get_or_insert`]
956 - [`OsStr::into_os_string`]
957 - [`OsString::into_boxed_os_str`]
960 - [`Utf8Error::error_len`]
961 - [`char::EscapeDebug`]
962 - [`char::escape_debug`]
968 - [`mem::ManuallyDrop`]
969 - [`slice::sort_unstable_by_key`]
970 - [`slice::sort_unstable_by`]
971 - [`slice::sort_unstable`]
972 - [`str::from_boxed_utf8_unchecked`]
973 - [`str::as_bytes_mut`]
974 - [`str::as_bytes_mut`]
975 - [`str::from_utf8_mut`]
976 - [`str::from_utf8_unchecked_mut`]
978 - [`str::get_unchecked_mut`]
979 - [`str::get_unchecked`]
981 - [`str::into_boxed_bytes`]
986 - [Cargo API token location moved from `~/.cargo/config` to
987 `~/.cargo/credentials`.][cargo/3978]
988 - [Cargo will now build `main.rs` binaries that are in sub-directories of
989 `src/bin`.][cargo/4214] ie. Having `src/bin/server/main.rs` and
990 `src/bin/client/main.rs` generates `target/debug/server` and `target/debug/client`
991 - [You can now specify version of a binary when installed through
992 `cargo install` using `--vers`.][cargo/4229]
993 - [Added `--no-fail-fast` flag to cargo to run all benchmarks regardless of
994 failure.][cargo/4248]
995 - [Changed the convention around which file is the crate root.][cargo/4259]
996 - [The `include`/`exclude` property in `Cargo.toml` now accepts gitignore paths
997 instead of glob patterns][cargo/4270]. Glob patterns are now deprecated.
1002 - [Functions with `'static` in their return types will now not be as usable as
1003 if they were using lifetime parameters instead.][42417]
1004 - [The reimplementation of `{f32, f64}::is_sign_{negative, positive}` now
1005 takes the sign of NaN into account where previously didn't.][42430]
1007 [42033]: https://github.com/rust-lang/rust/pull/42033
1008 [42155]: https://github.com/rust-lang/rust/pull/42155
1009 [42271]: https://github.com/rust-lang/rust/pull/42271
1010 [42397]: https://github.com/rust-lang/rust/pull/42397
1011 [42417]: https://github.com/rust-lang/rust/pull/42417
1012 [42430]: https://github.com/rust-lang/rust/pull/42430
1013 [42431]: https://github.com/rust-lang/rust/pull/42431
1014 [42533]: https://github.com/rust-lang/rust/pull/42533
1015 [42571]: https://github.com/rust-lang/rust/pull/42571
1016 [42613]: https://github.com/rust-lang/rust/pull/42613
1017 [42799]: https://github.com/rust-lang/rust/pull/42799
1018 [42807]: https://github.com/rust-lang/rust/pull/42807
1019 [42809]: https://github.com/rust-lang/rust/pull/42809
1020 [42822]: https://github.com/rust-lang/rust/pull/42822
1021 [42826]: https://github.com/rust-lang/rust/pull/42826
1022 [42854]: https://github.com/rust-lang/rust/pull/42854
1023 [42913]: https://github.com/rust-lang/rust/pull/42913
1024 [42999]: https://github.com/rust-lang/rust/pull/42999
1025 [43011]: https://github.com/rust-lang/rust/pull/43011
1026 [43015]: https://github.com/rust-lang/rust/pull/43015
1027 [43072]: https://github.com/rust-lang/rust/pull/43072
1028 [43077]: https://github.com/rust-lang/rust/pull/43077
1029 [43097]: https://github.com/rust-lang/rust/pull/43097
1030 [43099]: https://github.com/rust-lang/rust/pull/43099
1031 [43170]: https://github.com/rust-lang/rust/pull/43170
1032 [43178]: https://github.com/rust-lang/rust/pull/43178
1033 [43185]: https://github.com/rust-lang/rust/pull/43185
1034 [43228]: https://github.com/rust-lang/rust/pull/43228
1035 [cargo/3978]: https://github.com/rust-lang/cargo/pull/3978
1036 [cargo/4214]: https://github.com/rust-lang/cargo/pull/4214
1037 [cargo/4229]: https://github.com/rust-lang/cargo/pull/4229
1038 [cargo/4248]: https://github.com/rust-lang/cargo/pull/4248
1039 [cargo/4259]: https://github.com/rust-lang/cargo/pull/4259
1040 [cargo/4270]: https://github.com/rust-lang/cargo/pull/4270
1041 [`CStr::into_c_string`]: https://doc.rust-lang.org/std/ffi/struct.CStr.html#method.into_c_string
1042 [`CString::as_c_str`]: https://doc.rust-lang.org/std/ffi/struct.CString.html#method.as_c_str
1043 [`CString::into_boxed_c_str`]: https://doc.rust-lang.org/std/ffi/struct.CString.html#method.into_boxed_c_str
1044 [`Chain::get_mut`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.get_mut
1045 [`Chain::get_ref`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.get_ref
1046 [`Chain::into_inner`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.into_inner
1047 [`Option::get_or_insert_with`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.get_or_insert_with
1048 [`Option::get_or_insert`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.get_or_insert
1049 [`OsStr::into_os_string`]: https://doc.rust-lang.org/std/ffi/struct.OsStr.html#method.into_os_string
1050 [`OsString::into_boxed_os_str`]: https://doc.rust-lang.org/std/ffi/struct.OsString.html#method.into_boxed_os_str
1051 [`Take::get_mut`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.get_mut
1052 [`Take::get_ref`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.get_ref
1053 [`Utf8Error::error_len`]: https://doc.rust-lang.org/std/str/struct.Utf8Error.html#method.error_len
1054 [`char::EscapeDebug`]: https://doc.rust-lang.org/std/char/struct.EscapeDebug.html
1055 [`char::escape_debug`]: https://doc.rust-lang.org/std/primitive.char.html#method.escape_debug
1056 [`compile_error!`]: https://doc.rust-lang.org/std/macro.compile_error.html
1057 [`f32::from_bits`]: https://doc.rust-lang.org/std/primitive.f32.html#method.from_bits
1058 [`f32::to_bits`]: https://doc.rust-lang.org/std/primitive.f32.html#method.to_bits
1059 [`f64::from_bits`]: https://doc.rust-lang.org/std/primitive.f64.html#method.from_bits
1060 [`f64::to_bits`]: https://doc.rust-lang.org/std/primitive.f64.html#method.to_bits
1061 [`mem::ManuallyDrop`]: https://doc.rust-lang.org/std/mem/union.ManuallyDrop.html
1062 [`slice::sort_unstable_by_key`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable_by_key
1063 [`slice::sort_unstable_by`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable_by
1064 [`slice::sort_unstable`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable
1065 [`str::from_boxed_utf8_unchecked`]: https://doc.rust-lang.org/std/str/fn.from_boxed_utf8_unchecked.html
1066 [`str::as_bytes_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.as_bytes_mut
1067 [`str::from_utf8_mut`]: https://doc.rust-lang.org/std/str/fn.from_utf8_mut.html
1068 [`str::from_utf8_unchecked_mut`]: https://doc.rust-lang.org/std/str/fn.from_utf8_unchecked_mut.html
1069 [`str::get_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_mut
1070 [`str::get_unchecked_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_unchecked_mut
1071 [`str::get_unchecked`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_unchecked
1072 [`str::get`]: https://doc.rust-lang.org/std/primitive.str.html#method.get
1073 [`str::into_boxed_bytes`]: https://doc.rust-lang.org/std/primitive.str.html#method.into_boxed_bytes
1076 Version 1.19.0 (2017-07-20)
1077 ===========================
1082 - [Numeric fields can now be used for creating tuple structs.][41145] [RFC 1506]
1083 For example `struct Point(u32, u32); let x = Point { 0: 7, 1: 0 };`.
1084 - [Macro recursion limit increased to 1024 from 64.][41676]
1085 - [Added lint for detecting unused macros.][41907]
1086 - [`loop` can now return a value with `break`.][42016] [RFC 1624]
1087 For example: `let x = loop { break 7; };`
1088 - [C compatible `union`s are now available.][42068] [RFC 1444] They can only
1089 contain `Copy` types and cannot have a `Drop` implementation.
1090 Example: `union Foo { bar: u8, baz: usize }`
1091 - [Non capturing closures can now be coerced into `fn`s,][42162] [RFC 1558]
1092 Example: `let foo: fn(u8) -> u8 = |v: u8| { v };`
1097 - [Add support for bootstrapping the Rust compiler toolchain on Android.][41370]
1098 - [Change `arm-linux-androideabi` to correspond to the `armeabi`
1099 official ABI.][41656] If you wish to continue targeting the `armeabi-v7a` ABI
1100 you should use `--target armv7-linux-androideabi`.
1101 - [Fixed ICE when removing a source file between compilation sessions.][41873]
1102 - [Minor optimisation of string operations.][42037]
1103 - [Compiler error message is now `aborting due to previous error(s)` instead of
1104 `aborting due to N previous errors`][42150] This was previously inaccurate and
1105 would only count certain kinds of errors.
1106 - [The compiler now supports Visual Studio 2017][42225]
1107 - [The compiler is now built against LLVM 4.0.1 by default][42948]
1108 - [Added a lot][42264] of [new error codes][42302]
1109 - [Added `target-feature=+crt-static` option][37406] [RFC 1721] Which allows
1110 libraries with C Run-time Libraries(CRT) to be statically linked.
1111 - [Fixed various ARM codegen bugs][42740]
1116 - [`String` now implements `FromIterator<Cow<'a, str>>` and
1117 `Extend<Cow<'a, str>>`][41449]
1118 - [`Vec` now implements `From<&mut [T]>`][41530]
1119 - [`Box<[u8]>` now implements `From<Box<str>>`][41258]
1120 - [`SplitWhitespace` now implements `Clone`][41659]
1121 - [`[u8]::reverse` is now 5x faster and `[u16]::reverse` is now
1123 - [`eprint!` and `eprintln!` macros added to prelude.][41192] Same as the `print!`
1124 macros, but for printing to stderr.
1129 - [`OsString::shrink_to_fit`]
1132 - [`thread::ThreadId`]
1137 - [Build scripts can now add environment variables to the environment
1138 the crate is being compiled in.
1139 Example: `println!("cargo:rustc-env=FOO=bar");`][cargo/3929]
1140 - [Subcommands now replace the current process rather than spawning a new
1141 child process][cargo/3970]
1142 - [Workspace members can now accept glob file patterns][cargo/3979]
1143 - [Added `--all` flag to the `cargo bench` subcommand to run benchmarks of all
1144 the members in a given workspace.][cargo/3988]
1145 - [Updated `libssh2-sys` to 0.2.6][cargo/4008]
1146 - [Target directory path is now in the cargo metadata][cargo/4022]
1147 - [Cargo no longer checks out a local working directory for the
1148 crates.io index][cargo/4026] This should provide smaller file size for the
1149 registry, and improve cloning times, especially on Windows machines.
1150 - [Added an `--exclude` option for excluding certain packages when using the
1151 `--all` option][cargo/4031]
1152 - [Cargo will now automatically retry when receiving a 5xx error
1153 from crates.io][cargo/4032]
1154 - [The `--features` option now accepts multiple comma or space
1155 delimited values.][cargo/4084]
1156 - [Added support for custom target specific runners][cargo/3954]
1161 - [Added `rust-windbg.cmd`][39983] for loading rust `.natvis` files in the
1163 - [Rust will now release XZ compressed packages][rust-installer/57]
1164 - [rustup will now prefer to download rust packages with
1165 XZ compression][rustup/1100] over GZip packages.
1166 - [Added the ability to escape `#` in rust documentation][41785] By adding
1167 additional `#`'s ie. `##` is now `#`
1172 - [`MutexGuard<T>` may only be `Sync` if `T` is `Sync`.][41624]
1173 - [`-Z` flags are now no longer allowed to be used on the stable
1174 compiler.][41751] This has been a warning for a year previous to this.
1175 - [As a result of the `-Z` flag change, the `cargo-check` plugin no
1176 longer works][42844]. Users should migrate to the built-in `check`
1177 command, which has been available since 1.16.
1178 - [Ending a float literal with `._` is now a hard error.
1179 Example: `42._` .][41946]
1180 - [Any use of a private `extern crate` outside of its module is now a
1181 hard error.][36886] This was previously a warning.
1182 - [`use ::self::foo;` is now a hard error.][36888] `self` paths are always
1183 relative while the `::` prefix makes a path absolute, but was ignored and the
1184 path was relative regardless.
1185 - [Floating point constants in match patterns is now a hard error][36890]
1186 This was previously a warning.
1187 - [Struct or enum constants that don't derive `PartialEq` & `Eq` used
1188 match patterns is now a hard error][36891] This was previously a warning.
1189 - [Lifetimes named `'_` are no longer allowed.][36892] This was previously
1191 - [From the pound escape, lines consisting of multiple `#`s are
1193 - [It is an error to re-export private enum variants][42460]. This is
1194 known to break a number of crates that depend on an older version of
1196 - [On Windows, if `VCINSTALLDIR` is set incorrectly, `rustc` will try
1197 to use it to find the linker, and the build will fail where it did
1198 not previously][42607]
1200 [36886]: https://github.com/rust-lang/rust/issues/36886
1201 [36888]: https://github.com/rust-lang/rust/issues/36888
1202 [36890]: https://github.com/rust-lang/rust/issues/36890
1203 [36891]: https://github.com/rust-lang/rust/issues/36891
1204 [36892]: https://github.com/rust-lang/rust/issues/36892
1205 [37406]: https://github.com/rust-lang/rust/issues/37406
1206 [39983]: https://github.com/rust-lang/rust/pull/39983
1207 [41145]: https://github.com/rust-lang/rust/pull/41145
1208 [41192]: https://github.com/rust-lang/rust/pull/41192
1209 [41258]: https://github.com/rust-lang/rust/pull/41258
1210 [41370]: https://github.com/rust-lang/rust/pull/41370
1211 [41449]: https://github.com/rust-lang/rust/pull/41449
1212 [41530]: https://github.com/rust-lang/rust/pull/41530
1213 [41624]: https://github.com/rust-lang/rust/pull/41624
1214 [41656]: https://github.com/rust-lang/rust/pull/41656
1215 [41659]: https://github.com/rust-lang/rust/pull/41659
1216 [41676]: https://github.com/rust-lang/rust/pull/41676
1217 [41751]: https://github.com/rust-lang/rust/pull/41751
1218 [41764]: https://github.com/rust-lang/rust/pull/41764
1219 [41785]: https://github.com/rust-lang/rust/pull/41785
1220 [41873]: https://github.com/rust-lang/rust/pull/41873
1221 [41907]: https://github.com/rust-lang/rust/pull/41907
1222 [41946]: https://github.com/rust-lang/rust/pull/41946
1223 [42016]: https://github.com/rust-lang/rust/pull/42016
1224 [42037]: https://github.com/rust-lang/rust/pull/42037
1225 [42068]: https://github.com/rust-lang/rust/pull/42068
1226 [42150]: https://github.com/rust-lang/rust/pull/42150
1227 [42162]: https://github.com/rust-lang/rust/pull/42162
1228 [42225]: https://github.com/rust-lang/rust/pull/42225
1229 [42264]: https://github.com/rust-lang/rust/pull/42264
1230 [42302]: https://github.com/rust-lang/rust/pull/42302
1231 [42460]: https://github.com/rust-lang/rust/issues/42460
1232 [42607]: https://github.com/rust-lang/rust/issues/42607
1233 [42740]: https://github.com/rust-lang/rust/pull/42740
1234 [42844]: https://github.com/rust-lang/rust/issues/42844
1235 [42948]: https://github.com/rust-lang/rust/pull/42948
1236 [RFC 1444]: https://github.com/rust-lang/rfcs/pull/1444
1237 [RFC 1506]: https://github.com/rust-lang/rfcs/pull/1506
1238 [RFC 1558]: https://github.com/rust-lang/rfcs/pull/1558
1239 [RFC 1624]: https://github.com/rust-lang/rfcs/pull/1624
1240 [RFC 1721]: https://github.com/rust-lang/rfcs/pull/1721
1241 [`Command::envs`]: https://doc.rust-lang.org/std/process/struct.Command.html#method.envs
1242 [`OsString::shrink_to_fit`]: https://doc.rust-lang.org/std/ffi/struct.OsString.html#method.shrink_to_fit
1243 [`cmp::Reverse`]: https://doc.rust-lang.org/std/cmp/struct.Reverse.html
1244 [`thread::ThreadId`]: https://doc.rust-lang.org/std/thread/struct.ThreadId.html
1245 [cargo/3929]: https://github.com/rust-lang/cargo/pull/3929
1246 [cargo/3954]: https://github.com/rust-lang/cargo/pull/3954
1247 [cargo/3970]: https://github.com/rust-lang/cargo/pull/3970
1248 [cargo/3979]: https://github.com/rust-lang/cargo/pull/3979
1249 [cargo/3988]: https://github.com/rust-lang/cargo/pull/3988
1250 [cargo/4008]: https://github.com/rust-lang/cargo/pull/4008
1251 [cargo/4022]: https://github.com/rust-lang/cargo/pull/4022
1252 [cargo/4026]: https://github.com/rust-lang/cargo/pull/4026
1253 [cargo/4031]: https://github.com/rust-lang/cargo/pull/4031
1254 [cargo/4032]: https://github.com/rust-lang/cargo/pull/4032
1255 [cargo/4084]: https://github.com/rust-lang/cargo/pull/4084
1256 [rust-installer/57]: https://github.com/rust-lang/rust-installer/pull/57
1257 [rustup/1100]: https://github.com/rust-lang-nursery/rustup.rs/pull/1100
1260 Version 1.18.0 (2017-06-08)
1261 ===========================
1266 - [Stabilize pub(restricted)][40556] `pub` can now accept a module path to
1267 make the item visible to just that module tree. Also accepts the keyword
1268 `crate` to make something public to the whole crate but not users of the
1269 library. Example: `pub(crate) mod utils;`. [RFC 1422].
1270 - [Stabilize `#![windows_subsystem]` attribute][40870] conservative exposure of the
1271 `/SUBSYSTEM` linker flag on Windows platforms. [RFC 1665].
1272 - [Refactor of trait object type parsing][40043] Now `ty` in macros can accept
1273 types like `Write + Send`, trailing `+` are now supported in trait objects,
1274 and better error reporting for trait objects starting with `?Sized`.
1275 - [0e+10 is now a valid floating point literal][40589]
1276 - [Now warns if you bind a lifetime parameter to 'static][40734]
1277 - [Tuples, Enum variant fields, and structs with no `repr` attribute or with
1278 `#[repr(Rust)]` are reordered to minimize padding and produce a smaller
1279 representation in some cases.][40377]
1284 - [rustc can now emit mir with `--emit mir`][39891]
1285 - [Improved LLVM IR for trivial functions][40367]
1286 - [Added explanation for E0090(Wrong number of lifetimes are supplied)][40723]
1287 - [rustc compilation is now 15%-20% faster][41469] Thanks to optimisation
1288 opportunities found through profiling
1289 - [Improved backtrace formatting when panicking][38165]
1294 - [Specialized `Vec::from_iter` being passed `vec::IntoIter`][40731] if the
1295 iterator hasn't been advanced the original `Vec` is reassembled with no actual
1296 iteration or reallocation.
1297 - [Simplified HashMap Bucket interface][40561] provides performance
1298 improvements for iterating and cloning.
1299 - [Specialize Vec::from_elem to use calloc][40409]
1300 - [Fixed Race condition in fs::create_dir_all][39799]
1301 - [No longer caching stdio on Windows][40516]
1302 - [Optimized insertion sort in slice][40807] insertion sort in some cases
1303 2.50%~ faster and in one case now 12.50% faster.
1304 - [Optimized `AtomicBool::fetch_nand`][41143]
1309 - [`Child::try_wait`]
1310 - [`HashMap::retain`]
1311 - [`HashSet::retain`]
1313 - [`TcpStream::peek`]
1314 - [`UdpSocket::peek`]
1315 - [`UdpSocket::peek_from`]
1320 - [Added partial Pijul support][cargo/3842] Pijul is a version control system in Rust.
1321 You can now create new cargo projects with Pijul using `cargo new --vcs pijul`
1322 - [Now always emits build script warnings for crates that fail to build][cargo/3847]
1323 - [Added Android build support][cargo/3885]
1324 - [Added `--bins` and `--tests` flags][cargo/3901] now you can build all programs
1325 of a certain type, for example `cargo build --bins` will build all
1327 - [Added support for haiku][cargo/3952]
1332 - [rustdoc can now use pulldown-cmark with the `--enable-commonmark` flag][40338]
1333 - [Added rust-windbg script for better debugging on Windows][39983]
1334 - [Rust now uses the official cross compiler for NetBSD][40612]
1335 - [rustdoc now accepts `#` at the start of files][40828]
1336 - [Fixed jemalloc support for musl][41168]
1341 - [Changes to how the `0` flag works in format!][40241] Padding zeroes are now
1342 always placed after the sign if it exists and before the digits. With the `#`
1343 flag the zeroes are placed after the prefix and before the digits.
1344 - [Due to the struct field optimisation][40377], using `transmute` on structs
1345 that have no `repr` attribute or `#[repr(Rust)]` will no longer work. This has
1346 always been undefined behavior, but is now more likely to break in practice.
1347 - [The refactor of trait object type parsing][40043] fixed a bug where `+` was
1348 receiving the wrong priority parsing things like `&for<'a> Tr<'a> + Send` as
1349 `&(for<'a> Tr<'a> + Send)` instead of `(&for<'a> Tr<'a>) + Send`
1350 - [Overlapping inherent `impl`s are now a hard error][40728]
1351 - [`PartialOrd` and `Ord` must agree on the ordering.][41270]
1352 - [`rustc main.rs -o out --emit=asm,llvm-ir`][41085] Now will output
1353 `out.asm` and `out.ll` instead of only one of the filetypes.
1354 - [ calling a function that returns `Self` will no longer work][41805] when
1355 the size of `Self` cannot be statically determined.
1356 - [rustc now builds with a "pthreads" flavour of MinGW for Windows GNU][40805]
1357 this has caused a few regressions namely:
1359 - Changed the link order of local static/dynamic libraries (respecting the
1360 order on given rather than having the compiler reorder).
1361 - Changed how MinGW is linked, native code linked to dynamic libraries
1362 may require manually linking to the gcc support library (for the native
1365 [38165]: https://github.com/rust-lang/rust/pull/38165
1366 [39799]: https://github.com/rust-lang/rust/pull/39799
1367 [39891]: https://github.com/rust-lang/rust/pull/39891
1368 [39983]: https://github.com/rust-lang/rust/pull/39983
1369 [40043]: https://github.com/rust-lang/rust/pull/40043
1370 [40241]: https://github.com/rust-lang/rust/pull/40241
1371 [40338]: https://github.com/rust-lang/rust/pull/40338
1372 [40367]: https://github.com/rust-lang/rust/pull/40367
1373 [40377]: https://github.com/rust-lang/rust/pull/40377
1374 [40409]: https://github.com/rust-lang/rust/pull/40409
1375 [40516]: https://github.com/rust-lang/rust/pull/40516
1376 [40556]: https://github.com/rust-lang/rust/pull/40556
1377 [40561]: https://github.com/rust-lang/rust/pull/40561
1378 [40589]: https://github.com/rust-lang/rust/pull/40589
1379 [40612]: https://github.com/rust-lang/rust/pull/40612
1380 [40723]: https://github.com/rust-lang/rust/pull/40723
1381 [40728]: https://github.com/rust-lang/rust/pull/40728
1382 [40731]: https://github.com/rust-lang/rust/pull/40731
1383 [40734]: https://github.com/rust-lang/rust/pull/40734
1384 [40805]: https://github.com/rust-lang/rust/pull/40805
1385 [40807]: https://github.com/rust-lang/rust/pull/40807
1386 [40828]: https://github.com/rust-lang/rust/pull/40828
1387 [40870]: https://github.com/rust-lang/rust/pull/40870
1388 [41085]: https://github.com/rust-lang/rust/pull/41085
1389 [41143]: https://github.com/rust-lang/rust/pull/41143
1390 [41168]: https://github.com/rust-lang/rust/pull/41168
1391 [41270]: https://github.com/rust-lang/rust/issues/41270
1392 [41469]: https://github.com/rust-lang/rust/pull/41469
1393 [41805]: https://github.com/rust-lang/rust/issues/41805
1394 [RFC 1422]: https://github.com/rust-lang/rfcs/blob/master/text/1422-pub-restricted.md
1395 [RFC 1665]: https://github.com/rust-lang/rfcs/blob/master/text/1665-windows-subsystem.md
1396 [`Child::try_wait`]: https://doc.rust-lang.org/std/process/struct.Child.html#method.try_wait
1397 [`HashMap::retain`]: https://doc.rust-lang.org/std/collections/struct.HashMap.html#method.retain
1398 [`HashSet::retain`]: https://doc.rust-lang.org/std/collections/struct.HashSet.html#method.retain
1399 [`PeekMut::pop`]: https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html#method.pop
1400 [`TcpStream::peek`]: https://doc.rust-lang.org/std/net/struct.TcpStream.html#method.peek
1401 [`UdpSocket::peek_from`]: https://doc.rust-lang.org/std/net/struct.UdpSocket.html#method.peek_from
1402 [`UdpSocket::peek`]: https://doc.rust-lang.org/std/net/struct.UdpSocket.html#method.peek
1403 [cargo/3842]: https://github.com/rust-lang/cargo/pull/3842
1404 [cargo/3847]: https://github.com/rust-lang/cargo/pull/3847
1405 [cargo/3885]: https://github.com/rust-lang/cargo/pull/3885
1406 [cargo/3901]: https://github.com/rust-lang/cargo/pull/3901
1407 [cargo/3952]: https://github.com/rust-lang/cargo/pull/3952
1410 Version 1.17.0 (2017-04-27)
1411 ===========================
1416 * [The lifetime of statics and consts defaults to `'static`][39265]. [RFC 1623]
1417 * [Fields of structs may be initialized without duplicating the field/variable
1418 names][39761]. [RFC 1682]
1419 * [`Self` may be included in the `where` clause of `impls`][38864]. [RFC 1647]
1420 * [When coercing to an unsized type lifetimes must be equal][40319]. That is,
1421 there is no subtyping between `T` and `U` when `T: Unsize<U>`. For example,
1422 coercing `&mut [&'a X; N]` to `&mut [&'b X]` requires `'a` be equal to
1423 `'b`. Soundness fix.
1424 * [Values passed to the indexing operator, `[]`, automatically coerce][40166]
1425 * [Static variables may contain references to other statics][40027]
1430 * [Exit quickly on only `--emit dep-info`][40336]
1431 * [Make `-C relocation-model` more correctly determine whether the linker
1432 creates a position-independent executable][40245]
1433 * [Add `-C overflow-checks` to directly control whether integer overflow
1435 * [The rustc type checker now checks items on demand instead of in a single
1436 in-order pass][40008]. This is mostly an internal refactoring in support of
1437 future work, including incremental type checking, but also resolves [RFC
1438 1647], allowing `Self` to appear in `impl` `where` clauses.
1439 * [Optimize vtable loads][39995]
1440 * [Turn off vectorization for Emscripten targets][39990]
1441 * [Provide suggestions for unknown macros imported with `use`][39953]
1442 * [Fix ICEs in path resolution][39939]
1443 * [Strip exception handling code on Emscripten when `panic=abort`][39193]
1444 * [Add clearer error message using `&str + &str`][39116]
1455 * [`Ordering::then`]
1456 * [`Ordering::then_with`]
1457 * [`BTreeMap::range`]
1458 * [`BTreeMap::range_mut`]
1459 * [`collections::Bound`]
1460 * [`process::abort`]
1461 * [`ptr::read_unaligned`]
1462 * [`ptr::write_unaligned`]
1463 * [`Result::expect_err`]
1466 * [`Cell::into_inner`]
1472 * [`BTreeMap` and `BTreeSet` can iterate over ranges][27787]
1473 * [`Cell` can store non-`Copy` types][39793]. [RFC 1651]
1474 * [`String` implements `FromIterator<&char>`][40028]
1475 * `Box` [implements][40009] a number of new conversions:
1476 `From<Box<str>> for String`,
1477 `From<Box<[T]>> for Vec<T>`,
1478 `From<Box<CStr>> for CString`,
1479 `From<Box<OsStr>> for OsString`,
1480 `From<Box<Path>> for PathBuf`,
1481 `Into<Box<str>> for String`,
1482 `Into<Box<[T]>> for Vec<T>`,
1483 `Into<Box<CStr>> for CString`,
1484 `Into<Box<OsStr>> for OsString`,
1485 `Into<Box<Path>> for PathBuf`,
1486 `Default for Box<str>`,
1487 `Default for Box<CStr>`,
1488 `Default for Box<OsStr>`,
1489 `From<&CStr> for Box<CStr>`,
1490 `From<&OsStr> for Box<OsStr>`,
1491 `From<&Path> for Box<Path>`
1492 * [`ffi::FromBytesWithNulError` implements `Error` and `Display`][39960]
1493 * [Specialize `PartialOrd<A> for [A] where A: Ord`][39642]
1494 * [Slightly optimize `slice::sort`][39538]
1495 * [Add `ToString` trait specialization for `Cow<'a, str>` and `String`][39440]
1496 * [`Box<[T]>` implements `From<&[T]> where T: Copy`,
1497 `Box<str>` implements `From<&str>`][39438]
1498 * [`IpAddr` implements `From` for various arrays. `SocketAddr` implements
1499 `From<(I, u16)> where I: Into<IpAddr>`][39372]
1500 * [`format!` estimates the needed capacity before writing a string][39356]
1501 * [Support unprivileged symlink creation in Windows][38921]
1502 * [`PathBuf` implements `Default`][38764]
1503 * [Implement `PartialEq<[A]>` for `VecDeque<A>`][38661]
1504 * [`HashMap` resizes adaptively][38368] to guard against DOS attacks
1505 and poor hash functions.
1510 * [Add `cargo check --all`][cargo/3731]
1511 * [Add an option to ignore SSL revocation checking][cargo/3699]
1512 * [Add `cargo run --package`][cargo/3691]
1513 * [Add `required_features`][cargo/3667]
1514 * [Assume `build.rs` is a build script][cargo/3664]
1515 * [Find workspace via `workspace_root` link in containing member][cargo/3562]
1520 * [Documentation is rendered with mdbook instead of the obsolete, in-tree
1522 * [The "Unstable Book" documents nightly-only features][ubook]
1523 * [Improve the style of the sidebar in rustdoc output][40265]
1524 * [Configure build correctly on 64-bit CPU's with the armhf ABI][40261]
1525 * [Fix MSP430 breakage due to `i128`][40257]
1526 * [Preliminary Solaris/SPARCv9 support][39903]
1527 * [`rustc` is linked statically on Windows MSVC targets][39837], allowing it to
1528 run without installing the MSVC runtime.
1529 * [`rustdoc --test` includes file names in test names][39788]
1530 * This release includes builds of `std` for `sparc64-unknown-linux-gnu`,
1531 `aarch64-unknown-linux-fuchsia`, and `x86_64-unknown-linux-fuchsia`.
1532 * [Initial support for `aarch64-unknown-freebsd`][39491]
1533 * [Initial support for `i686-unknown-netbsd`][39426]
1534 * [This release no longer includes the old makefile build system][39431]. Rust
1535 is built with a custom build system, written in Rust, and with Cargo.
1536 * [Add Debug implementations for libcollection structs][39002]
1537 * [`TypeId` implements `PartialOrd` and `Ord`][38981]
1538 * [`--test-threads=0` produces an error][38945]
1539 * [`rustup` installs documentation by default][40526]
1540 * [The Rust source includes NatVis visualizations][39843]. These can be used by
1541 WinDbg and Visual Studio to improve the debugging experience.
1546 * [Rust 1.17 does not correctly detect the MSVC 2017 linker][38584]. As a
1547 workaround, either use MSVC 2015 or run vcvars.bat.
1548 * [When coercing to an unsized type lifetimes must be equal][40319]. That is,
1549 disallow subtyping between `T` and `U` when `T: Unsize<U>`, e.g. coercing
1550 `&mut [&'a X; N]` to `&mut [&'b X]` requires `'a` be equal to `'b`. Soundness
1552 * [`format!` and `Display::to_string` panic if an underlying formatting
1553 implementation returns an error][40117]. Previously the error was silently
1554 ignored. It is incorrect for `write_fmt` to return an error when writing
1556 * [In-tree crates are verified to be unstable][39851]. Previously, some minor
1557 crates were marked stable and could be accessed from the stable toolchain.
1558 * [Rust git source no longer includes vendored crates][39728]. Those that need
1559 to build with vendored crates should build from release tarballs.
1560 * [Fix inert attributes from `proc_macro_derives`][39572]
1561 * [During crate resolution, rustc prefers a crate in the sysroot if two crates
1562 are otherwise identical][39518]. Unlikely to be encountered outside the Rust
1564 * [Fixed bugs around how type inference interacts with dead-code][39485]. The
1565 existing code generally ignores the type of dead-code unless a type-hint is
1566 provided; this can cause surprising inference interactions particularly around
1567 defaulting. The new code uniformly ignores the result type of dead-code.
1568 * [Tuple-struct constructors with private fields are no longer visible][38932]
1569 * [Lifetime parameters that do not appear in the arguments are now considered
1570 early-bound][38897], resolving a soundness bug (#[32330]). The
1571 `hr_lifetime_in_assoc_type` future-compatibility lint has been in effect since
1573 * [rustdoc: fix doctests with non-feature crate attributes][38161]
1574 * [Make transmuting from fn item types to pointer-sized types a hard
1577 [27787]: https://github.com/rust-lang/rust/issues/27787
1578 [32330]: https://github.com/rust-lang/rust/issues/32330
1579 [34198]: https://github.com/rust-lang/rust/pull/34198
1580 [38161]: https://github.com/rust-lang/rust/pull/38161
1581 [38368]: https://github.com/rust-lang/rust/pull/38368
1582 [38584]: https://github.com/rust-lang/rust/issues/38584
1583 [38661]: https://github.com/rust-lang/rust/pull/38661
1584 [38764]: https://github.com/rust-lang/rust/pull/38764
1585 [38864]: https://github.com/rust-lang/rust/issues/38864
1586 [38897]: https://github.com/rust-lang/rust/pull/38897
1587 [38921]: https://github.com/rust-lang/rust/pull/38921
1588 [38932]: https://github.com/rust-lang/rust/pull/38932
1589 [38945]: https://github.com/rust-lang/rust/pull/38945
1590 [38981]: https://github.com/rust-lang/rust/pull/38981
1591 [39002]: https://github.com/rust-lang/rust/pull/39002
1592 [39116]: https://github.com/rust-lang/rust/pull/39116
1593 [39193]: https://github.com/rust-lang/rust/pull/39193
1594 [39265]: https://github.com/rust-lang/rust/pull/39265
1595 [39356]: https://github.com/rust-lang/rust/pull/39356
1596 [39372]: https://github.com/rust-lang/rust/pull/39372
1597 [39426]: https://github.com/rust-lang/rust/pull/39426
1598 [39431]: https://github.com/rust-lang/rust/pull/39431
1599 [39438]: https://github.com/rust-lang/rust/pull/39438
1600 [39440]: https://github.com/rust-lang/rust/pull/39440
1601 [39485]: https://github.com/rust-lang/rust/pull/39485
1602 [39491]: https://github.com/rust-lang/rust/pull/39491
1603 [39518]: https://github.com/rust-lang/rust/pull/39518
1604 [39538]: https://github.com/rust-lang/rust/pull/39538
1605 [39572]: https://github.com/rust-lang/rust/pull/39572
1606 [39633]: https://github.com/rust-lang/rust/pull/39633
1607 [39642]: https://github.com/rust-lang/rust/pull/39642
1608 [39728]: https://github.com/rust-lang/rust/pull/39728
1609 [39761]: https://github.com/rust-lang/rust/pull/39761
1610 [39788]: https://github.com/rust-lang/rust/pull/39788
1611 [39793]: https://github.com/rust-lang/rust/pull/39793
1612 [39837]: https://github.com/rust-lang/rust/pull/39837
1613 [39843]: https://github.com/rust-lang/rust/pull/39843
1614 [39851]: https://github.com/rust-lang/rust/pull/39851
1615 [39903]: https://github.com/rust-lang/rust/pull/39903
1616 [39939]: https://github.com/rust-lang/rust/pull/39939
1617 [39953]: https://github.com/rust-lang/rust/pull/39953
1618 [39960]: https://github.com/rust-lang/rust/pull/39960
1619 [39990]: https://github.com/rust-lang/rust/pull/39990
1620 [39995]: https://github.com/rust-lang/rust/pull/39995
1621 [40008]: https://github.com/rust-lang/rust/pull/40008
1622 [40009]: https://github.com/rust-lang/rust/pull/40009
1623 [40027]: https://github.com/rust-lang/rust/pull/40027
1624 [40028]: https://github.com/rust-lang/rust/pull/40028
1625 [40037]: https://github.com/rust-lang/rust/pull/40037
1626 [40117]: https://github.com/rust-lang/rust/pull/40117
1627 [40166]: https://github.com/rust-lang/rust/pull/40166
1628 [40245]: https://github.com/rust-lang/rust/pull/40245
1629 [40257]: https://github.com/rust-lang/rust/pull/40257
1630 [40261]: https://github.com/rust-lang/rust/pull/40261
1631 [40265]: https://github.com/rust-lang/rust/pull/40265
1632 [40319]: https://github.com/rust-lang/rust/pull/40319
1633 [40336]: https://github.com/rust-lang/rust/pull/40336
1634 [40526]: https://github.com/rust-lang/rust/pull/40526
1635 [RFC 1623]: https://github.com/rust-lang/rfcs/blob/master/text/1623-static.md
1636 [RFC 1647]: https://github.com/rust-lang/rfcs/blob/master/text/1647-allow-self-in-where-clauses.md
1637 [RFC 1651]: https://github.com/rust-lang/rfcs/blob/master/text/1651-movecell.md
1638 [RFC 1682]: https://github.com/rust-lang/rfcs/blob/master/text/1682-field-init-shorthand.md
1639 [`Arc::from_raw`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.from_raw
1640 [`Arc::into_raw`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.into_raw
1641 [`Arc::ptr_eq`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.ptr_eq
1642 [`BTreeMap::range_mut`]: https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.range_mut
1643 [`BTreeMap::range`]: https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.range
1644 [`Cell::into_inner`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.into_inner
1645 [`Cell::replace`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.replace
1646 [`Cell::swap`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.swap
1647 [`Cell::take`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.take
1648 [`Ordering::then_with`]: https://doc.rust-lang.org/std/cmp/enum.Ordering.html#method.then_with
1649 [`Ordering::then`]: https://doc.rust-lang.org/std/cmp/enum.Ordering.html#method.then
1650 [`Rc::from_raw`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.from_raw
1651 [`Rc::into_raw`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.into_raw
1652 [`Rc::ptr_eq`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.ptr_eq
1653 [`Result::expect_err`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.expect_err
1654 [`collections::Bound`]: https://doc.rust-lang.org/std/collections/enum.Bound.html
1655 [`process::abort`]: https://doc.rust-lang.org/std/process/fn.abort.html
1656 [`ptr::read_unaligned`]: https://doc.rust-lang.org/std/ptr/fn.read_unaligned.html
1657 [`ptr::write_unaligned`]: https://doc.rust-lang.org/std/ptr/fn.write_unaligned.html
1658 [cargo/3562]: https://github.com/rust-lang/cargo/pull/3562
1659 [cargo/3664]: https://github.com/rust-lang/cargo/pull/3664
1660 [cargo/3667]: https://github.com/rust-lang/cargo/pull/3667
1661 [cargo/3691]: https://github.com/rust-lang/cargo/pull/3691
1662 [cargo/3699]: https://github.com/rust-lang/cargo/pull/3699
1663 [cargo/3731]: https://github.com/rust-lang/cargo/pull/3731
1664 [mdbook]: https://crates.io/crates/mdbook
1665 [ubook]: https://doc.rust-lang.org/unstable-book/
1668 Version 1.16.0 (2017-03-16)
1669 ===========================
1674 * [The compiler's `dead_code` lint now accounts for type aliases][38051].
1675 * [Uninhabitable enums (those without any variants) no longer permit wildcard
1676 match patterns][38069]
1677 * [Clean up semantics of `self` in an import list][38313]
1678 * [`Self` may appear in `impl` headers][38920]
1679 * [`Self` may appear in struct expressions][39282]
1684 * [`rustc` now supports `--emit=metadata`, which causes rustc to emit
1685 a `.rmeta` file containing only crate metadata][38571]. This can be
1686 used by tools like the Rust Language Service to perform
1687 metadata-only builds.
1688 * [Levenshtein based typo suggestions now work in most places, while
1689 previously they worked only for fields and sometimes for local
1690 variables][38927]. Together with the overhaul of "no
1691 resolution"/"unexpected resolution" errors (#[38154]) they result in
1692 large and systematic improvement in resolution diagnostics.
1693 * [Fix `transmute::<T, U>` where `T` requires a bigger alignment than
1695 * [rustc: use -Xlinker when specifying an rpath with ',' in it][38798]
1696 * [`rustc` no longer attempts to provide "consider using an explicit
1697 lifetime" suggestions][37057]. They were inaccurate.
1702 * [`VecDeque::truncate`]
1703 * [`VecDeque::resize`]
1704 * [`String::insert_str`]
1705 * [`Duration::checked_add`]
1706 * [`Duration::checked_sub`]
1707 * [`Duration::checked_div`]
1708 * [`Duration::checked_mul`]
1711 * [`SocketAddr::is_ipv4`]
1712 * [`SocketAddr::is_ipv6`]
1713 * [`IpAddr::is_ipv4`]
1714 * [`IpAddr::is_ipv6`]
1716 * [`Vec::dedup_by_key`]
1717 * [`Result::unwrap_or_default`]
1718 * [`<*const T>::wrapping_offset`]
1719 * [`<*mut T>::wrapping_offset`]
1720 * `CommandExt::creation_flags`
1721 * [`File::set_permissions`]
1722 * [`String::split_off`]
1727 * [`[T]::binary_search` and `[T]::binary_search_by_key` now take
1728 their argument by `Borrow` parameter][37761]
1729 * [All public types in std implement `Debug`][38006]
1730 * [`IpAddr` implements `From<Ipv4Addr>` and `From<Ipv6Addr>`][38327]
1731 * [`Ipv6Addr` implements `From<[u16; 8]>`][38131]
1732 * [Ctrl-Z returns from `Stdin.read()` when reading from the console on
1734 * [std: Fix partial writes in `LineWriter`][38062]
1735 * [std: Clamp max read/write sizes on Unix][38062]
1736 * [Use more specific panic message for `&str` slicing errors][38066]
1737 * [`TcpListener::set_only_v6` is deprecated][38304]. This
1738 functionality cannot be achieved in std currently.
1739 * [`writeln!`, like `println!`, now accepts a form with no string
1740 or formatting arguments, to just print a newline][38469]
1741 * [Implement `iter::Sum` and `iter::Product` for `Result`][38580]
1742 * [Reduce the size of static data in `std_unicode::tables`][38781]
1743 * [`char::EscapeDebug`, `EscapeDefault`, `EscapeUnicode`,
1744 `CaseMappingIter`, `ToLowercase`, `ToUppercase`, implement
1746 * [`Duration` implements `Sum`][38712]
1747 * [`String` implements `ToSocketAddrs`][39048]
1752 * [The `cargo check` command does a type check of a project without
1753 building it][cargo/3296]
1754 * [crates.io will display CI badges from Travis and AppVeyor, if
1755 specified in Cargo.toml][cargo/3546]
1756 * [crates.io will display categories listed in Cargo.toml][cargo/3301]
1757 * [Compilation profiles accept integer values for `debug`, in addition
1758 to `true` and `false`. These are passed to `rustc` as the value to
1759 `-C debuginfo`][cargo/3534]
1760 * [Implement `cargo --version --verbose`][cargo/3604]
1761 * [All builds now output 'dep-info' build dependencies compatible with
1762 make and ninja][cargo/3557]
1763 * [Build all workspace members with `build --all`][cargo/3511]
1764 * [Document all workspace members with `doc --all`][cargo/3515]
1765 * [Path deps outside workspace are not members][cargo/3443]
1770 * [`rustdoc` has a `--sysroot` argument that, like `rustc`, specifies
1771 the path to the Rust implementation][38589]
1772 * [The `armv7-linux-androideabi` target no longer enables NEON
1773 extensions, per Google's ABI guide][38413]
1774 * [The stock standard library can be compiled for Redox OS][38401]
1775 * [Rust has initial SPARC support][38726]. Tier 3. No builds
1777 * [Rust has experimental support for Nvidia PTX][38559]. Tier 3. No
1779 * [Fix backtraces on i686-pc-windows-gnu by disabling FPO][39379]
1784 * [Uninhabitable enums (those without any variants) no longer permit wildcard
1785 match patterns][38069]
1786 * In this release, references to uninhabited types can not be
1787 pattern-matched. This was accidentally allowed in 1.15.
1788 * [The compiler's `dead_code` lint now accounts for type aliases][38051].
1789 * [Ctrl-Z returns from `Stdin.read()` when reading from the console on
1791 * [Clean up semantics of `self` in an import list][38313]
1792 * Reimplemented lifetime elision. This change was almost entirely compatible
1793 with existing code, but it did close a number of small bugs and loopholes,
1794 as well as being more accepting in some other [cases][41105].
1796 [37057]: https://github.com/rust-lang/rust/pull/37057
1797 [37761]: https://github.com/rust-lang/rust/pull/37761
1798 [38006]: https://github.com/rust-lang/rust/pull/38006
1799 [38051]: https://github.com/rust-lang/rust/pull/38051
1800 [38062]: https://github.com/rust-lang/rust/pull/38062
1801 [38062]: https://github.com/rust-lang/rust/pull/38622
1802 [38066]: https://github.com/rust-lang/rust/pull/38066
1803 [38069]: https://github.com/rust-lang/rust/pull/38069
1804 [38131]: https://github.com/rust-lang/rust/pull/38131
1805 [38154]: https://github.com/rust-lang/rust/pull/38154
1806 [38274]: https://github.com/rust-lang/rust/pull/38274
1807 [38304]: https://github.com/rust-lang/rust/pull/38304
1808 [38313]: https://github.com/rust-lang/rust/pull/38313
1809 [38314]: https://github.com/rust-lang/rust/pull/38314
1810 [38327]: https://github.com/rust-lang/rust/pull/38327
1811 [38401]: https://github.com/rust-lang/rust/pull/38401
1812 [38413]: https://github.com/rust-lang/rust/pull/38413
1813 [38469]: https://github.com/rust-lang/rust/pull/38469
1814 [38559]: https://github.com/rust-lang/rust/pull/38559
1815 [38571]: https://github.com/rust-lang/rust/pull/38571
1816 [38580]: https://github.com/rust-lang/rust/pull/38580
1817 [38589]: https://github.com/rust-lang/rust/pull/38589
1818 [38670]: https://github.com/rust-lang/rust/pull/38670
1819 [38712]: https://github.com/rust-lang/rust/pull/38712
1820 [38726]: https://github.com/rust-lang/rust/pull/38726
1821 [38781]: https://github.com/rust-lang/rust/pull/38781
1822 [38798]: https://github.com/rust-lang/rust/pull/38798
1823 [38909]: https://github.com/rust-lang/rust/pull/38909
1824 [38920]: https://github.com/rust-lang/rust/pull/38920
1825 [38927]: https://github.com/rust-lang/rust/pull/38927
1826 [39048]: https://github.com/rust-lang/rust/pull/39048
1827 [39282]: https://github.com/rust-lang/rust/pull/39282
1828 [39379]: https://github.com/rust-lang/rust/pull/39379
1829 [41105]: https://github.com/rust-lang/rust/issues/41105
1830 [`<*const T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset
1831 [`<*mut T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset
1832 [`Duration::checked_add`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_add
1833 [`Duration::checked_div`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_div
1834 [`Duration::checked_mul`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_mul
1835 [`Duration::checked_sub`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_sub
1836 [`File::set_permissions`]: https://doc.rust-lang.org/std/fs/struct.File.html#method.set_permissions
1837 [`IpAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv4
1838 [`IpAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv6
1839 [`Result::unwrap_or_default`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.unwrap_or_default
1840 [`SocketAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv4
1841 [`SocketAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv6
1842 [`String::insert_str`]: https://doc.rust-lang.org/std/string/struct.String.html#method.insert_str
1843 [`String::split_off`]: https://doc.rust-lang.org/std/string/struct.String.html#method.split_off
1844 [`Vec::dedup_by_key`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by_key
1845 [`Vec::dedup_by`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by
1846 [`VecDeque::resize`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.resize
1847 [`VecDeque::truncate`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.truncate
1848 [`str::repeat`]: https://doc.rust-lang.org/std/primitive.str.html#method.repeat
1849 [`str::replacen`]: https://doc.rust-lang.org/std/primitive.str.html#method.replacen
1850 [cargo/3296]: https://github.com/rust-lang/cargo/pull/3296
1851 [cargo/3301]: https://github.com/rust-lang/cargo/pull/3301
1852 [cargo/3443]: https://github.com/rust-lang/cargo/pull/3443
1853 [cargo/3511]: https://github.com/rust-lang/cargo/pull/3511
1854 [cargo/3515]: https://github.com/rust-lang/cargo/pull/3515
1855 [cargo/3534]: https://github.com/rust-lang/cargo/pull/3534
1856 [cargo/3546]: https://github.com/rust-lang/cargo/pull/3546
1857 [cargo/3557]: https://github.com/rust-lang/cargo/pull/3557
1858 [cargo/3604]: https://github.com/rust-lang/cargo/pull/3604
1859 [RFC 1623]: https://github.com/rust-lang/rfcs/blob/master/text/1623-static.md
1862 Version 1.15.1 (2017-02-09)
1863 ===========================
1865 * [Fix IntoIter::as_mut_slice's signature][39466]
1866 * [Compile compiler builtins with `-fPIC` on 32-bit platforms][39523]
1868 [39466]: https://github.com/rust-lang/rust/pull/39466
1869 [39523]: https://github.com/rust-lang/rust/pull/39523
1872 Version 1.15.0 (2017-02-02)
1873 ===========================
1878 * Basic procedural macros allowing custom `#[derive]`, aka "macros 1.1", are
1879 stable. This allows popular code-generating crates like Serde and Diesel to
1880 work ergonomically. [RFC 1681].
1881 * [Tuple structs may be empty. Unary and empty tuple structs may be instantiated
1882 with curly braces][36868]. Part of [RFC 1506].
1883 * [A number of minor changes to name resolution have been activated][37127].
1884 They add up to more consistent semantics, allowing for future evolution of
1885 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
1886 details of what is different. The breaking changes here have been transitioned
1887 through the [`legacy_imports`] lint since 1.14, with no known regressions.
1888 * [In `macro_rules`, `path` fragments can now be parsed as type parameter
1890 * [`?Sized` can be used in `where` clauses][37791]
1891 * [There is now a limit on the size of monomorphized types and it can be
1892 modified with the `#![type_size_limit]` crate attribute, similarly to
1893 the `#![recursion_limit]` attribute][37789]
1898 * [On Windows, the compiler will apply dllimport attributes when linking to
1899 extern functions][37973]. Additional attributes and flags can control which
1900 library kind is linked and its name. [RFC 1717].
1901 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
1902 * [The `--test` flag works with procedural macro crates][38107]
1903 * [Fix `extern "aapcs" fn` ABI][37814]
1904 * [The `-C no-stack-check` flag is deprecated][37636]. It does nothing.
1905 * [The `format!` expander recognizes incorrect `printf` and shell-style
1906 formatting directives and suggests the correct format][37613].
1907 * [Only report one error for all unused imports in an import list][37456]
1909 Compiler Performance
1910 --------------------
1912 * [Avoid unnecessary `mk_ty` calls in `Ty::super_fold_with`][37705]
1913 * [Avoid more unnecessary `mk_ty` calls in `Ty::super_fold_with`][37979]
1914 * [Don't clone in `UnificationTable::probe`][37848]
1915 * [Remove `scope_auxiliary` to cut RSS by 10%][37764]
1916 * [Use small vectors in type walker][37760]
1917 * [Macro expansion performance was improved][37701]
1918 * [Change `HirVec<P<T>>` to `HirVec<T>` in `hir::Expr`][37642]
1919 * [Replace FNV with a faster hash function][37229]
1924 * [`std::iter::Iterator::min_by`]
1925 * [`std::iter::Iterator::max_by`]
1926 * [`std::os::*::fs::FileExt`]
1927 * [`std::sync::atomic::Atomic*::get_mut`]
1928 * [`std::sync::atomic::Atomic*::into_inner`]
1929 * [`std::vec::IntoIter::as_slice`]
1930 * [`std::vec::IntoIter::as_mut_slice`]
1931 * [`std::sync::mpsc::Receiver::try_iter`]
1932 * [`std::os::unix::process::CommandExt::before_exec`]
1933 * [`std::rc::Rc::strong_count`]
1934 * [`std::rc::Rc::weak_count`]
1935 * [`std::sync::Arc::strong_count`]
1936 * [`std::sync::Arc::weak_count`]
1937 * [`std::char::encode_utf8`]
1938 * [`std::char::encode_utf16`]
1939 * [`std::cell::Ref::clone`]
1940 * [`std::io::Take::into_inner`]
1945 * [The standard sorting algorithm has been rewritten for dramatic performance
1946 improvements][38192]. It is a hybrid merge sort, drawing influences from
1947 Timsort. Previously it was a naive merge sort.
1948 * [`Iterator::nth` no longer has a `Sized` bound][38134]
1949 * [`Extend<&T>` is specialized for `Vec` where `T: Copy`][38182] to improve
1951 * [`chars().count()` is much faster][37888] and so are [`chars().last()`
1952 and `char_indices().last()`][37882]
1953 * [Fix ARM Objective-C ABI in `std::env::args`][38146]
1954 * [Chinese characters display correctly in `fmt::Debug`][37855]
1955 * [Derive `Default` for `Duration`][37699]
1956 * [Support creation of anonymous pipes on WinXP/2k][37677]
1957 * [`mpsc::RecvTimeoutError` implements `Error`][37527]
1958 * [Don't pass overlapped handles to processes][38835]
1963 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
1964 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
1965 should instead check the variable at runtime with `std::env`. That the value
1966 was set at build time was a bug, and incorrect when cross-compiling. This
1967 change is known to cause breakage.
1968 * [Add `--all` flag to `cargo test`][cargo/3221]
1969 * [Compile statically against the MSVC CRT][cargo/3363]
1970 * [Mix feature flags into fingerprint/metadata shorthash][cargo/3102]
1971 * [Link OpenSSL statically on OSX][cargo/3311]
1972 * [Apply new fingerprinting to build dir outputs][cargo/3310]
1973 * [Test for bad path overrides with summaries][cargo/3336]
1974 * [Require `cargo install --vers` to take a semver version][cargo/3338]
1975 * [Fix retrying crate downloads for network errors][cargo/3348]
1976 * [Implement string lookup for `build.rustflags` config key][cargo/3356]
1977 * [Emit more info on --message-format=json][cargo/3319]
1978 * [Assume `build.rs` in the same directory as `Cargo.toml` is a build script][cargo/3361]
1979 * [Don't ignore errors in workspace manifest][cargo/3409]
1980 * [Fix `--message-format JSON` when rustc emits non-JSON warnings][cargo/3410]
1985 * [Test runners (binaries built with `--test`) now support a `--list` argument
1986 that lists the tests it contains][38185]
1987 * [Test runners now support a `--exact` argument that makes the test filter
1988 match exactly, instead of matching only a substring of the test name][38181]
1989 * [rustdoc supports a `--playground-url` flag][37763]
1990 * [rustdoc provides more details about `#[should_panic]` errors][37749]
1995 * [The Rust build system is now written in Rust][37817]. The Makefiles may
1996 continue to be used in this release by passing `--disable-rustbuild` to the
1997 configure script, but they will be deleted soon. Note that the new build
1998 system uses a different on-disk layout that will likely affect any scripts
2000 * [Rust supports i686-unknown-openbsd][38086]. Tier 3 support. No testing or
2002 * [Rust supports the MSP430][37627]. Tier 3 support. No testing or releases.
2003 * [Rust supports the ARMv5TE architecture][37615]. Tier 3 support. No testing or
2009 * [A number of minor changes to name resolution have been activated][37127].
2010 They add up to more consistent semantics, allowing for future evolution of
2011 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
2012 details of what is different. The breaking changes here have been transitioned
2013 through the [`legacy_imports`] lint since 1.14, with no known regressions.
2014 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
2015 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
2016 should instead check the variable at runtime with `std::env`. That the value
2017 was set at build time was a bug, and incorrect when cross-compiling. This
2018 change is known to cause breakage.
2019 * [Higher-ranked lifetimes are no longer allowed to appear _only_ in associated
2020 types][33685]. The [`hr_lifetime_in_assoc_type` lint] has been a warning since
2021 1.10 and is now an error by default. It will become a hard error in the near
2023 * [The semantics relating modules to file system directories are changing in
2024 minor ways][37602]. This is captured in the new `legacy_directory_ownership`
2025 lint, which is a warning in this release, and will become a hard error in the
2027 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
2028 * [Once `Peekable` peeks a `None` it will return that `None` without re-querying
2029 the underlying iterator][37834]
2031 ["changes"]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md#changes-to-name-resolution-rules
2032 [33685]: https://github.com/rust-lang/rust/issues/33685
2033 [36868]: https://github.com/rust-lang/rust/pull/36868
2034 [37127]: https://github.com/rust-lang/rust/pull/37127
2035 [37229]: https://github.com/rust-lang/rust/pull/37229
2036 [37456]: https://github.com/rust-lang/rust/pull/37456
2037 [37527]: https://github.com/rust-lang/rust/pull/37527
2038 [37602]: https://github.com/rust-lang/rust/pull/37602
2039 [37613]: https://github.com/rust-lang/rust/pull/37613
2040 [37615]: https://github.com/rust-lang/rust/pull/37615
2041 [37636]: https://github.com/rust-lang/rust/pull/37636
2042 [37627]: https://github.com/rust-lang/rust/pull/37627
2043 [37642]: https://github.com/rust-lang/rust/pull/37642
2044 [37677]: https://github.com/rust-lang/rust/pull/37677
2045 [37699]: https://github.com/rust-lang/rust/pull/37699
2046 [37701]: https://github.com/rust-lang/rust/pull/37701
2047 [37705]: https://github.com/rust-lang/rust/pull/37705
2048 [37749]: https://github.com/rust-lang/rust/pull/37749
2049 [37760]: https://github.com/rust-lang/rust/pull/37760
2050 [37763]: https://github.com/rust-lang/rust/pull/37763
2051 [37764]: https://github.com/rust-lang/rust/pull/37764
2052 [37789]: https://github.com/rust-lang/rust/pull/37789
2053 [37791]: https://github.com/rust-lang/rust/pull/37791
2054 [37814]: https://github.com/rust-lang/rust/pull/37814
2055 [37817]: https://github.com/rust-lang/rust/pull/37817
2056 [37834]: https://github.com/rust-lang/rust/pull/37834
2057 [37848]: https://github.com/rust-lang/rust/pull/37848
2058 [37855]: https://github.com/rust-lang/rust/pull/37855
2059 [37882]: https://github.com/rust-lang/rust/pull/37882
2060 [37888]: https://github.com/rust-lang/rust/pull/37888
2061 [37973]: https://github.com/rust-lang/rust/pull/37973
2062 [37979]: https://github.com/rust-lang/rust/pull/37979
2063 [38086]: https://github.com/rust-lang/rust/pull/38086
2064 [38107]: https://github.com/rust-lang/rust/pull/38107
2065 [38117]: https://github.com/rust-lang/rust/pull/38117
2066 [38134]: https://github.com/rust-lang/rust/pull/38134
2067 [38146]: https://github.com/rust-lang/rust/pull/38146
2068 [38181]: https://github.com/rust-lang/rust/pull/38181
2069 [38182]: https://github.com/rust-lang/rust/pull/38182
2070 [38185]: https://github.com/rust-lang/rust/pull/38185
2071 [38192]: https://github.com/rust-lang/rust/pull/38192
2072 [38279]: https://github.com/rust-lang/rust/pull/38279
2073 [38835]: https://github.com/rust-lang/rust/pull/38835
2074 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
2075 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
2076 [RFC 1560]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md
2077 [RFC 1681]: https://github.com/rust-lang/rfcs/blob/master/text/1681-macros-1.1.md
2078 [RFC 1717]: https://github.com/rust-lang/rfcs/blob/master/text/1717-dllimport.md
2079 [`hr_lifetime_in_assoc_type` lint]: https://github.com/rust-lang/rust/issues/33685
2080 [`legacy_imports`]: https://github.com/rust-lang/rust/pull/38271
2081 [cargo/3102]: https://github.com/rust-lang/cargo/pull/3102
2082 [cargo/3221]: https://github.com/rust-lang/cargo/pull/3221
2083 [cargo/3310]: https://github.com/rust-lang/cargo/pull/3310
2084 [cargo/3311]: https://github.com/rust-lang/cargo/pull/3311
2085 [cargo/3319]: https://github.com/rust-lang/cargo/pull/3319
2086 [cargo/3336]: https://github.com/rust-lang/cargo/pull/3336
2087 [cargo/3338]: https://github.com/rust-lang/cargo/pull/3338
2088 [cargo/3348]: https://github.com/rust-lang/cargo/pull/3348
2089 [cargo/3356]: https://github.com/rust-lang/cargo/pull/3356
2090 [cargo/3361]: https://github.com/rust-lang/cargo/pull/3361
2091 [cargo/3363]: https://github.com/rust-lang/cargo/pull/3363
2092 [cargo/3368]: https://github.com/rust-lang/cargo/issues/3368
2093 [cargo/3409]: https://github.com/rust-lang/cargo/pull/3409
2094 [cargo/3410]: https://github.com/rust-lang/cargo/pull/3410
2095 [`std::iter::Iterator::min_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.min_by
2096 [`std::iter::Iterator::max_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.max_by
2097 [`std::os::*::fs::FileExt`]: https://doc.rust-lang.org/std/os/unix/fs/trait.FileExt.html
2098 [`std::sync::atomic::Atomic*::get_mut`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.get_mut
2099 [`std::sync::atomic::Atomic*::into_inner`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.into_inner
2100 [`std::vec::IntoIter::as_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_slice
2101 [`std::vec::IntoIter::as_mut_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_mut_slice
2102 [`std::sync::mpsc::Receiver::try_iter`]: https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.try_iter
2103 [`std::os::unix::process::CommandExt::before_exec`]: https://doc.rust-lang.org/std/os/unix/process/trait.CommandExt.html#tymethod.before_exec
2104 [`std::rc::Rc::strong_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.strong_count
2105 [`std::rc::Rc::weak_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.weak_count
2106 [`std::sync::Arc::strong_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.strong_count
2107 [`std::sync::Arc::weak_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.weak_count
2108 [`std::char::encode_utf8`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf8
2109 [`std::char::encode_utf16`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf16
2110 [`std::cell::Ref::clone`]: https://doc.rust-lang.org/std/cell/struct.Ref.html#method.clone
2111 [`std::io::Take::into_inner`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.into_inner
2114 Version 1.14.0 (2016-12-22)
2115 ===========================
2120 * [`..` matches multiple tuple fields in enum variants, structs
2121 and tuples][36843]. [RFC 1492].
2122 * [Safe `fn` items can be coerced to `unsafe fn` pointers][37389]
2123 * [`use *` and `use ::*` both glob-import from the crate root][37367]
2124 * [It's now possible to call a `Vec<Box<Fn()>>` without explicit
2125 dereferencing][36822]
2130 * [Mark enums with non-zero discriminant as non-zero][37224]
2131 * [Lower-case `static mut` names are linted like other
2132 statics and consts][37162]
2133 * [Fix ICE on some macros in const integer positions
2134 (e.g. `[u8; m!()]`)][36819]
2135 * [Improve error message and snippet for "did you mean `x`"][36798]
2136 * [Add a panic-strategy field to the target specification][36794]
2137 * [Include LLVM version in `--version --verbose`][37200]
2139 Compile-time Optimizations
2140 --------------------------
2142 * [Improve macro expansion performance][37569]
2143 * [Shrink `Expr_::ExprInlineAsm`][37445]
2144 * [Replace all uses of SHA-256 with BLAKE2b][37439]
2145 * [Reduce the number of bytes hashed by `IchHasher`][37427]
2146 * [Avoid more allocations when compiling html5ever][37373]
2147 * [Use `SmallVector` in `CombineFields::instantiate`][37322]
2148 * [Avoid some allocations in the macro parser][37318]
2149 * [Use a faster deflate setting][37298]
2150 * [Add `ArrayVec` and `AccumulateVec` to reduce heap allocations
2151 during interning of slices][37270]
2152 * [Optimize `write_metadata`][37267]
2153 * [Don't process obligation forest cycles when stalled][37231]
2154 * [Avoid many `CrateConfig` clones][37161]
2155 * [Optimize `Substs::super_fold_with`][37108]
2156 * [Optimize `ObligationForest`'s `NodeState` handling][36993]
2157 * [Speed up `plug_leaks`][36917]
2162 * [`println!()`, with no arguments, prints newline][36825].
2163 Previously, an empty string was required to achieve the same.
2164 * [`Wrapping` impls standard binary and unary operators, as well as
2165 the `Sum` and `Product` iterators][37356]
2166 * [Implement `From<Cow<str>> for String` and `From<Cow<[T]>> for
2168 * [Improve `fold` performance for `chain`, `cloned`, `map`, and
2169 `VecDeque` iterators][37315]
2170 * [Improve `SipHasher` performance on small values][37312]
2171 * [Add Iterator trait TrustedLen to enable better FromIterator /
2173 * [Expand `.zip()` specialization to `.map()` and `.cloned()`][37230]
2174 * [`ReadDir` implements `Debug`][37221]
2175 * [Implement `RefUnwindSafe` for atomic types][37178]
2176 * [Specialize `Vec::extend` to `Vec::extend_from_slice`][37094]
2177 * [Avoid allocations in `Decoder::read_str`][37064]
2178 * [`io::Error` implements `From<io::ErrorKind>`][37037]
2179 * [Impl `Debug` for raw pointers to unsized data][36880]
2180 * [Don't reuse `HashMap` random seeds][37470]
2181 * [The internal memory layout of `HashMap` is more cache-friendly, for
2182 significant improvements in some operations][36692]
2183 * [`HashMap` uses less memory on 32-bit architectures][36595]
2184 * [Impl `Add<{str, Cow<str>}>` for `Cow<str>`][36430]
2189 * [Expose rustc cfg values to build scripts][cargo/3243]
2190 * [Allow cargo to work with read-only `CARGO_HOME`][cargo/3259]
2191 * [Fix passing --features when testing multiple packages][cargo/3280]
2192 * [Use a single profile set per workspace][cargo/3249]
2193 * [Load `replace` sections from lock files][cargo/3220]
2194 * [Ignore `panic` configuration for test/bench profiles][cargo/3175]
2199 * [rustup is the recommended Rust installation method][1.14rustup]
2200 * This release includes host (rustc) builds for Linux on MIPS, PowerPC, and
2201 S390x. These are [tier 2] platforms and may have major defects. Follow the
2202 instructions on the website to install, or add the targets to an existing
2203 installation with `rustup target add`. The new target triples are:
2204 - `mips-unknown-linux-gnu`
2205 - `mipsel-unknown-linux-gnu`
2206 - `mips64-unknown-linux-gnuabi64`
2207 - `mips64el-unknown-linux-gnuabi64 `
2208 - `powerpc-unknown-linux-gnu`
2209 - `powerpc64-unknown-linux-gnu`
2210 - `powerpc64le-unknown-linux-gnu`
2211 - `s390x-unknown-linux-gnu `
2212 * This release includes target (std) builds for ARM Linux running MUSL
2213 libc. These are [tier 2] platforms and may have major defects. Add the
2214 following triples to an existing rustup installation with `rustup target add`:
2215 - `arm-unknown-linux-musleabi`
2216 - `arm-unknown-linux-musleabihf`
2217 - `armv7-unknown-linux-musleabihf`
2218 * This release includes [experimental support for WebAssembly][1.14wasm], via
2219 the `wasm32-unknown-emscripten` target. This target is known to have major
2220 defects. Please test, report, and fix.
2221 * rustup no longer installs documentation by default. Run `rustup
2222 component add rust-docs` to install.
2223 * [Fix line stepping in debugger][37310]
2224 * [Enable line number debuginfo in releases][37280]
2229 * [Disable jemalloc on aarch64/powerpc/mips][37392]
2230 * [Add support for Fuchsia OS][37313]
2231 * [Detect local-rebuild by only MAJOR.MINOR version][37273]
2236 * [A number of forward-compatibility lints used by the compiler
2237 to gradually introduce language changes have been converted
2238 to deny by default][36894]:
2239 - ["use of inaccessible extern crate erroneously allowed"][36886]
2240 - ["type parameter default erroneously allowed in invalid location"][36887]
2241 - ["detects super or self keywords at the beginning of global path"][36888]
2242 - ["two overlapping inherent impls define an item with the same name
2243 were erroneously allowed"][36889]
2244 - ["floating-point constants cannot be used in patterns"][36890]
2245 - ["constants of struct or enum type can only be used in a pattern if
2246 the struct or enum has `#[derive(PartialEq, Eq)]`"][36891]
2247 - ["lifetimes or labels named `'_` were erroneously allowed"][36892]
2248 * [Prohibit patterns in trait methods without bodies][37378]
2249 * [The atomic `Ordering` enum may not be matched exhaustively][37351]
2250 * [Future-proofing `#[no_link]` breaks some obscure cases][37247]
2251 * [The `$crate` macro variable is accepted in fewer locations][37213]
2252 * [Impls specifying extra region requirements beyond the trait
2253 they implement are rejected][37167]
2254 * [Enums may not be unsized][37111]. Unsized enums are intended to
2255 work but never have. For now they are forbidden.
2256 * [Enforce the shadowing restrictions from RFC 1560 for today's macros][36767]
2258 [tier 2]: https://forge.rust-lang.org/platform-support.html
2259 [1.14rustup]: https://internals.rust-lang.org/t/beta-testing-rustup-rs/3316/204
2260 [1.14wasm]: https://users.rust-lang.org/t/compiling-to-the-web-with-rust-and-emscripten/7627
2261 [36430]: https://github.com/rust-lang/rust/pull/36430
2262 [36595]: https://github.com/rust-lang/rust/pull/36595
2263 [36595]: https://github.com/rust-lang/rust/pull/36595
2264 [36692]: https://github.com/rust-lang/rust/pull/36692
2265 [36767]: https://github.com/rust-lang/rust/pull/36767
2266 [36794]: https://github.com/rust-lang/rust/pull/36794
2267 [36798]: https://github.com/rust-lang/rust/pull/36798
2268 [36819]: https://github.com/rust-lang/rust/pull/36819
2269 [36822]: https://github.com/rust-lang/rust/pull/36822
2270 [36825]: https://github.com/rust-lang/rust/pull/36825
2271 [36843]: https://github.com/rust-lang/rust/pull/36843
2272 [36880]: https://github.com/rust-lang/rust/pull/36880
2273 [36886]: https://github.com/rust-lang/rust/issues/36886
2274 [36887]: https://github.com/rust-lang/rust/issues/36887
2275 [36888]: https://github.com/rust-lang/rust/issues/36888
2276 [36889]: https://github.com/rust-lang/rust/issues/36889
2277 [36890]: https://github.com/rust-lang/rust/issues/36890
2278 [36891]: https://github.com/rust-lang/rust/issues/36891
2279 [36892]: https://github.com/rust-lang/rust/issues/36892
2280 [36894]: https://github.com/rust-lang/rust/pull/36894
2281 [36917]: https://github.com/rust-lang/rust/pull/36917
2282 [36993]: https://github.com/rust-lang/rust/pull/36993
2283 [37037]: https://github.com/rust-lang/rust/pull/37037
2284 [37064]: https://github.com/rust-lang/rust/pull/37064
2285 [37094]: https://github.com/rust-lang/rust/pull/37094
2286 [37108]: https://github.com/rust-lang/rust/pull/37108
2287 [37111]: https://github.com/rust-lang/rust/pull/37111
2288 [37161]: https://github.com/rust-lang/rust/pull/37161
2289 [37162]: https://github.com/rust-lang/rust/pull/37162
2290 [37167]: https://github.com/rust-lang/rust/pull/37167
2291 [37178]: https://github.com/rust-lang/rust/pull/37178
2292 [37200]: https://github.com/rust-lang/rust/pull/37200
2293 [37213]: https://github.com/rust-lang/rust/pull/37213
2294 [37221]: https://github.com/rust-lang/rust/pull/37221
2295 [37224]: https://github.com/rust-lang/rust/pull/37224
2296 [37230]: https://github.com/rust-lang/rust/pull/37230
2297 [37231]: https://github.com/rust-lang/rust/pull/37231
2298 [37247]: https://github.com/rust-lang/rust/pull/37247
2299 [37267]: https://github.com/rust-lang/rust/pull/37267
2300 [37270]: https://github.com/rust-lang/rust/pull/37270
2301 [37273]: https://github.com/rust-lang/rust/pull/37273
2302 [37280]: https://github.com/rust-lang/rust/pull/37280
2303 [37298]: https://github.com/rust-lang/rust/pull/37298
2304 [37306]: https://github.com/rust-lang/rust/pull/37306
2305 [37310]: https://github.com/rust-lang/rust/pull/37310
2306 [37312]: https://github.com/rust-lang/rust/pull/37312
2307 [37313]: https://github.com/rust-lang/rust/pull/37313
2308 [37315]: https://github.com/rust-lang/rust/pull/37315
2309 [37318]: https://github.com/rust-lang/rust/pull/37318
2310 [37322]: https://github.com/rust-lang/rust/pull/37322
2311 [37326]: https://github.com/rust-lang/rust/pull/37326
2312 [37351]: https://github.com/rust-lang/rust/pull/37351
2313 [37356]: https://github.com/rust-lang/rust/pull/37356
2314 [37367]: https://github.com/rust-lang/rust/pull/37367
2315 [37373]: https://github.com/rust-lang/rust/pull/37373
2316 [37378]: https://github.com/rust-lang/rust/pull/37378
2317 [37389]: https://github.com/rust-lang/rust/pull/37389
2318 [37392]: https://github.com/rust-lang/rust/pull/37392
2319 [37427]: https://github.com/rust-lang/rust/pull/37427
2320 [37439]: https://github.com/rust-lang/rust/pull/37439
2321 [37445]: https://github.com/rust-lang/rust/pull/37445
2322 [37470]: https://github.com/rust-lang/rust/pull/37470
2323 [37569]: https://github.com/rust-lang/rust/pull/37569
2324 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
2325 [cargo/3175]: https://github.com/rust-lang/cargo/pull/3175
2326 [cargo/3220]: https://github.com/rust-lang/cargo/pull/3220
2327 [cargo/3243]: https://github.com/rust-lang/cargo/pull/3243
2328 [cargo/3249]: https://github.com/rust-lang/cargo/pull/3249
2329 [cargo/3259]: https://github.com/rust-lang/cargo/pull/3259
2330 [cargo/3280]: https://github.com/rust-lang/cargo/pull/3280
2333 Version 1.13.0 (2016-11-10)
2334 ===========================
2339 * [Stabilize the `?` operator][36995]. `?` is a simple way to propagate
2340 errors, like the `try!` macro, described in [RFC 0243].
2341 * [Stabilize macros in type position][36014]. Described in [RFC 873].
2342 * [Stabilize attributes on statements][36995]. Described in [RFC 0016].
2343 * [Fix `#[derive]` for empty tuple structs/variants][35728]
2344 * [Fix lifetime rules for 'if' conditions][36029]
2345 * [Avoid loading and parsing unconfigured non-inline modules][36482]
2350 * [Add the `-C link-arg` argument][36574]
2351 * [Remove the old AST-based backend from rustc_trans][35764]
2352 * [Don't enable NEON by default on armv7 Linux][35814]
2353 * [Fix debug line number info for macro expansions][35238]
2354 * [Do not emit "class method" debuginfo for types that are not
2355 DICompositeType][36008]
2356 * [Warn about multiple conflicting #[repr] hints][34623]
2357 * [When sizing DST, don't double-count nested struct prefixes][36351]
2358 * [Default RUST_MIN_STACK to 16MiB for now][36505]
2359 * [Improve rlib metadata format][36551]. Reduces rlib size significantly.
2360 * [Reject macros with empty repetitions to avoid infinite loop][36721]
2361 * [Expand macros without recursing to avoid stack overflows][36214]
2366 * [Replace macro backtraces with labeled local uses][35702]
2367 * [Improve error message for misplaced doc comments][33922]
2368 * [Buffer unix and lock windows to prevent message interleaving][35975]
2369 * [Update lifetime errors to specifically note temporaries][36171]
2370 * [Special case a few colors for Windows][36178]
2371 * [Suggest `use self` when such an import resolves][36289]
2372 * [Be more specific when type parameter shadows primitive type][36338]
2373 * Many minor improvements
2375 Compile-time Optimizations
2376 --------------------------
2378 * [Compute and cache HIR hashes at beginning][35854]
2379 * [Don't hash types in loan paths][36004]
2380 * [Cache projections in trans][35761]
2381 * [Optimize the parser's last token handling][36527]
2382 * [Only instantiate #[inline] functions in codegen units referencing
2383 them][36524]. This leads to big improvements in cases where crates export
2384 define many inline functions without using them directly.
2385 * [Lazily allocate TypedArena's first chunk][36592]
2386 * [Don't allocate during default HashSet creation][36734]
2393 * [`overflowing_abs`]
2394 * [`RefCell::try_borrow`]
2395 * [`RefCell::try_borrow_mut`]
2400 * [Add `assert_ne!` and `debug_assert_ne!`][35074]
2401 * [Make `vec_deque::Drain`, `hash_map::Drain`, and `hash_set::Drain`
2403 * [Implement `AsRef<[T]>` for `std::slice::Iter`][35559]
2404 * [Implement `Debug` for `std::vec::IntoIter`][35707]
2405 * [`CString`: avoid excessive growth just to 0-terminate][35871]
2406 * [Implement `CoerceUnsized` for `{Cell, RefCell, UnsafeCell}`][35627]
2407 * [Use arc4rand on FreeBSD][35884]
2408 * [memrchr: Correct aligned offset computation][35969]
2409 * [Improve Demangling of Rust Symbols][36059]
2410 * [Use monotonic time in condition variables][35048]
2411 * [Implement `Debug` for `std::path::{Components,Iter}`][36101]
2412 * [Implement conversion traits for `char`][35755]
2413 * [Fix illegal instruction caused by overflow in channel cloning][36104]
2414 * [Zero first byte of CString on drop][36264]
2415 * [Inherit overflow checks for sum and product][36372]
2416 * [Add missing Eq implementations][36423]
2417 * [Implement `Debug` for `DirEntry`][36631]
2418 * [When `getaddrinfo` returns `EAI_SYSTEM` retrieve actual error from
2420 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
2421 * [Implement more traits for `std::io::ErrorKind`][35911]
2422 * [Optimize BinaryHeap bounds checking][36072]
2423 * [Work around pointer aliasing issue in `Vec::extend_from_slice`,
2424 `extend_with_element`][36355]
2425 * [Fix overflow checking in unsigned pow()][34942]
2430 * This release includes security fixes to both curl and OpenSSL.
2431 * [Fix transitive doctests when panic=abort][cargo/3021]
2432 * [Add --all-features flag to cargo][cargo/3038]
2433 * [Reject path-based dependencies in `cargo package`][cargo/3060]
2434 * [Don't parse the home directory more than once][cargo/3078]
2435 * [Don't try to generate Cargo.lock on empty workspaces][cargo/3092]
2436 * [Update OpenSSL to 1.0.2j][cargo/3121]
2437 * [Add license and license_file to cargo metadata output][cargo/3110]
2438 * [Make crates-io registry URL optional in config; ignore all changes to
2439 source.crates-io][cargo/3089]
2440 * [Don't download dependencies from other platforms][cargo/3123]
2441 * [Build transitive dev-dependencies when needed][cargo/3125]
2442 * [Add support for per-target rustflags in .cargo/config][cargo/3157]
2443 * [Avoid updating registry when adding existing deps][cargo/3144]
2444 * [Warn about path overrides that won't work][cargo/3136]
2445 * [Use workspaces during `cargo install`][cargo/3146]
2446 * [Leak mspdbsrv.exe processes on Windows][cargo/3162]
2447 * [Add --message-format flag][cargo/3000]
2448 * [Pass target environment for rustdoc][cargo/3205]
2449 * [Use `CommandExt::exec` for `cargo run` on Unix][cargo/2818]
2450 * [Update curl and curl-sys][cargo/3241]
2451 * [Call rustdoc test with the correct cfg flags of a package][cargo/3242]
2456 * [rustdoc: Add the `--sysroot` argument][36586]
2457 * [rustdoc: Fix a couple of issues with the search results][35655]
2458 * [rustdoc: remove the `!` from macro URLs and titles][35234]
2459 * [gdb: Fix pretty-printing special-cased Rust types][35585]
2460 * [rustdoc: Filter more incorrect methods inherited through Deref][36266]
2465 * [Remove unmaintained style guide][35124]
2466 * [Add s390x support][36369]
2467 * [Initial work at Haiku OS support][36727]
2468 * [Add mips-uclibc targets][35734]
2469 * [Crate-ify compiler-rt into compiler-builtins][35021]
2470 * [Add rustc version info (git hash + date) to dist tarball][36213]
2471 * Many documentation improvements
2476 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
2477 * [Deny (by default) transmuting from fn item types to pointer-sized
2478 types][34923]. Continuing the long transition to zero-sized fn items,
2480 * [Fix `#[derive]` for empty tuple structs/variants][35728].
2482 * [Issue deprecation warnings for safe accesses to extern statics][36173]
2483 * [Fix lifetime rules for 'if' conditions][36029].
2484 * [Inherit overflow checks for sum and product][36372].
2485 * [Forbid user-defined macros named "macro_rules"][36730].
2487 [33922]: https://github.com/rust-lang/rust/pull/33922
2488 [34623]: https://github.com/rust-lang/rust/pull/34623
2489 [34923]: https://github.com/rust-lang/rust/pull/34923
2490 [34942]: https://github.com/rust-lang/rust/pull/34942
2491 [34982]: https://github.com/rust-lang/rust/pull/34982
2492 [35021]: https://github.com/rust-lang/rust/pull/35021
2493 [35048]: https://github.com/rust-lang/rust/pull/35048
2494 [35074]: https://github.com/rust-lang/rust/pull/35074
2495 [35124]: https://github.com/rust-lang/rust/pull/35124
2496 [35234]: https://github.com/rust-lang/rust/pull/35234
2497 [35238]: https://github.com/rust-lang/rust/pull/35238
2498 [35354]: https://github.com/rust-lang/rust/pull/35354
2499 [35559]: https://github.com/rust-lang/rust/pull/35559
2500 [35585]: https://github.com/rust-lang/rust/pull/35585
2501 [35627]: https://github.com/rust-lang/rust/pull/35627
2502 [35655]: https://github.com/rust-lang/rust/pull/35655
2503 [35702]: https://github.com/rust-lang/rust/pull/35702
2504 [35707]: https://github.com/rust-lang/rust/pull/35707
2505 [35728]: https://github.com/rust-lang/rust/pull/35728
2506 [35734]: https://github.com/rust-lang/rust/pull/35734
2507 [35755]: https://github.com/rust-lang/rust/pull/35755
2508 [35761]: https://github.com/rust-lang/rust/pull/35761
2509 [35764]: https://github.com/rust-lang/rust/pull/35764
2510 [35814]: https://github.com/rust-lang/rust/pull/35814
2511 [35854]: https://github.com/rust-lang/rust/pull/35854
2512 [35871]: https://github.com/rust-lang/rust/pull/35871
2513 [35884]: https://github.com/rust-lang/rust/pull/35884
2514 [35911]: https://github.com/rust-lang/rust/pull/35911
2515 [35969]: https://github.com/rust-lang/rust/pull/35969
2516 [35975]: https://github.com/rust-lang/rust/pull/35975
2517 [36004]: https://github.com/rust-lang/rust/pull/36004
2518 [36008]: https://github.com/rust-lang/rust/pull/36008
2519 [36014]: https://github.com/rust-lang/rust/pull/36014
2520 [36029]: https://github.com/rust-lang/rust/pull/36029
2521 [36059]: https://github.com/rust-lang/rust/pull/36059
2522 [36072]: https://github.com/rust-lang/rust/pull/36072
2523 [36101]: https://github.com/rust-lang/rust/pull/36101
2524 [36104]: https://github.com/rust-lang/rust/pull/36104
2525 [36171]: https://github.com/rust-lang/rust/pull/36171
2526 [36173]: https://github.com/rust-lang/rust/pull/36173
2527 [36178]: https://github.com/rust-lang/rust/pull/36178
2528 [36213]: https://github.com/rust-lang/rust/pull/36213
2529 [36214]: https://github.com/rust-lang/rust/pull/36214
2530 [36264]: https://github.com/rust-lang/rust/pull/36264
2531 [36266]: https://github.com/rust-lang/rust/pull/36266
2532 [36289]: https://github.com/rust-lang/rust/pull/36289
2533 [36338]: https://github.com/rust-lang/rust/pull/36338
2534 [36351]: https://github.com/rust-lang/rust/pull/36351
2535 [36355]: https://github.com/rust-lang/rust/pull/36355
2536 [36369]: https://github.com/rust-lang/rust/pull/36369
2537 [36372]: https://github.com/rust-lang/rust/pull/36372
2538 [36423]: https://github.com/rust-lang/rust/pull/36423
2539 [36482]: https://github.com/rust-lang/rust/pull/36482
2540 [36505]: https://github.com/rust-lang/rust/pull/36505
2541 [36524]: https://github.com/rust-lang/rust/pull/36524
2542 [36527]: https://github.com/rust-lang/rust/pull/36527
2543 [36551]: https://github.com/rust-lang/rust/pull/36551
2544 [36574]: https://github.com/rust-lang/rust/pull/36574
2545 [36586]: https://github.com/rust-lang/rust/pull/36586
2546 [36592]: https://github.com/rust-lang/rust/pull/36592
2547 [36631]: https://github.com/rust-lang/rust/pull/36631
2548 [36639]: https://github.com/rust-lang/rust/pull/36639
2549 [36721]: https://github.com/rust-lang/rust/pull/36721
2550 [36727]: https://github.com/rust-lang/rust/pull/36727
2551 [36730]: https://github.com/rust-lang/rust/pull/36730
2552 [36734]: https://github.com/rust-lang/rust/pull/36734
2553 [36754]: https://github.com/rust-lang/rust/pull/36754
2554 [36995]: https://github.com/rust-lang/rust/pull/36995
2555 [RFC 0016]: https://github.com/rust-lang/rfcs/blob/master/text/0016-more-attributes.md
2556 [RFC 0243]: https://github.com/rust-lang/rfcs/blob/master/text/0243-trait-based-exception-handling.md
2557 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
2558 [RFC 401]: https://github.com/rust-lang/rfcs/blob/master/text/0401-coercions.md
2559 [RFC 873]: https://github.com/rust-lang/rfcs/blob/master/text/0873-type-macros.md
2560 [cargo/2818]: https://github.com/rust-lang/cargo/pull/2818
2561 [cargo/3000]: https://github.com/rust-lang/cargo/pull/3000
2562 [cargo/3021]: https://github.com/rust-lang/cargo/pull/3021
2563 [cargo/3038]: https://github.com/rust-lang/cargo/pull/3038
2564 [cargo/3060]: https://github.com/rust-lang/cargo/pull/3060
2565 [cargo/3078]: https://github.com/rust-lang/cargo/pull/3078
2566 [cargo/3089]: https://github.com/rust-lang/cargo/pull/3089
2567 [cargo/3092]: https://github.com/rust-lang/cargo/pull/3092
2568 [cargo/3110]: https://github.com/rust-lang/cargo/pull/3110
2569 [cargo/3121]: https://github.com/rust-lang/cargo/pull/3121
2570 [cargo/3123]: https://github.com/rust-lang/cargo/pull/3123
2571 [cargo/3125]: https://github.com/rust-lang/cargo/pull/3125
2572 [cargo/3136]: https://github.com/rust-lang/cargo/pull/3136
2573 [cargo/3144]: https://github.com/rust-lang/cargo/pull/3144
2574 [cargo/3146]: https://github.com/rust-lang/cargo/pull/3146
2575 [cargo/3157]: https://github.com/rust-lang/cargo/pull/3157
2576 [cargo/3162]: https://github.com/rust-lang/cargo/pull/3162
2577 [cargo/3205]: https://github.com/rust-lang/cargo/pull/3205
2578 [cargo/3241]: https://github.com/rust-lang/cargo/pull/3241
2579 [cargo/3242]: https://github.com/rust-lang/cargo/pull/3242
2580 [rustup]: https://www.rustup.rs
2581 [`checked_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.checked_abs
2582 [`wrapping_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.wrapping_abs
2583 [`overflowing_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.overflowing_abs
2584 [`RefCell::try_borrow`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow
2585 [`RefCell::try_borrow_mut`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow_mut
2586 [`SipHasher`]: https://doc.rust-lang.org/std/hash/struct.SipHasher.html
2587 [`DefaultHasher`]: https://doc.rust-lang.org/std/collections/hash_map/struct.DefaultHasher.html
2590 Version 1.12.1 (2016-10-20)
2591 ===========================
2596 * [ICE: 'rustc' panicked at 'assertion failed: concrete_substs.is_normalized_for_trans()' #36381][36381]
2597 * [Confusion with double negation and booleans][36856]
2598 * [rustc 1.12.0 fails with SIGSEGV in release mode (syn crate 0.8.0)][36875]
2599 * [Rustc 1.12.0 Windows build of `ethcore` crate fails with LLVM error][36924]
2600 * [1.12.0: High memory usage when linking in release mode with debug info][36926]
2601 * [Corrupted memory after updated to 1.12][36936]
2602 * ["Let NullaryConstructor = something;" causes internal compiler error: "tried to overwrite interned AdtDef"][37026]
2603 * [Fix ICE: inject bitcast if types mismatch for invokes/calls/stores][37112]
2604 * [debuginfo: Handle spread_arg case in MIR-trans in a more stable way.][37153]
2606 [36381]: https://github.com/rust-lang/rust/issues/36381
2607 [36856]: https://github.com/rust-lang/rust/issues/36856
2608 [36875]: https://github.com/rust-lang/rust/issues/36875
2609 [36924]: https://github.com/rust-lang/rust/issues/36924
2610 [36926]: https://github.com/rust-lang/rust/issues/36926
2611 [36936]: https://github.com/rust-lang/rust/issues/36936
2612 [37026]: https://github.com/rust-lang/rust/issues/37026
2613 [37112]: https://github.com/rust-lang/rust/issues/37112
2614 [37153]: https://github.com/rust-lang/rust/issues/37153
2617 Version 1.12.0 (2016-09-29)
2618 ===========================
2623 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)](https://github.com/rust-lang/rust/pull/34096).
2624 This translation pass is far simpler than the previous AST->LLVM pass, and
2625 creates opportunities to perform new optimizations directly on the MIR. It
2626 was previously described [on the Rust blog](https://blog.rust-lang.org/2016/04/19/MIR.html).
2627 * [`rustc` presents a new, more readable error format, along with
2628 machine-readable JSON error output for use by IDEs](https://github.com/rust-lang/rust/pull/35401).
2629 Most common editors supporting Rust have been updated to work with it. It was
2630 previously described [on the Rust blog](https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
2635 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)](https://github.com/rust-lang/rust/pull/34096).
2636 This translation pass is far simpler than the previous AST->LLVM pass, and
2637 creates opportunities to perform new optimizations directly on the MIR. It
2638 was previously described [on the Rust blog](https://blog.rust-lang.org/2016/04/19/MIR.html).
2639 * [Print the Rust target name, not the LLVM target name, with
2640 `--print target-list`](https://github.com/rust-lang/rust/pull/35489)
2641 * [The computation of `TypeId` is correct in some cases where it was previously
2642 producing inconsistent results](https://github.com/rust-lang/rust/pull/35267)
2643 * [The `mips-unknown-linux-gnu` target uses hardware floating point by default](https://github.com/rust-lang/rust/pull/34910)
2644 * [The `rustc` arguments, `--print target-cpus`, `--print target-features`,
2645 `--print relocation-models`, and `--print code-models` print the available
2646 options to the `-C target-cpu`, `-C target-feature`, `-C relocation-model` and
2647 `-C code-model` code generation arguments](https://github.com/rust-lang/rust/pull/34845)
2648 * [`rustc` supports three new MUSL targets on ARM: `arm-unknown-linux-musleabi`,
2649 `arm-unknown-linux-musleabihf`, and `armv7-unknown-linux-musleabihf`](https://github.com/rust-lang/rust/pull/35060).
2650 These targets produce statically-linked binaries. There are no binary release
2656 * [`rustc` presents a new, more readable error format, along with
2657 machine-readable JSON error output for use by IDEs](https://github.com/rust-lang/rust/pull/35401).
2658 Most common editors supporting Rust have been updated to work with it. It was
2659 previously described [on the Rust blog](https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
2660 * [In error descriptions, references are now described in plain English,
2661 instead of as "&-ptr"](https://github.com/rust-lang/rust/pull/35611)
2662 * [In error type descriptions, unknown numeric types are named `{integer}` or
2663 `{float}` instead of `_`](https://github.com/rust-lang/rust/pull/35080)
2664 * [`rustc` emits a clearer error when inner attributes follow a doc comment](https://github.com/rust-lang/rust/pull/34676)
2669 * [`macro_rules!` invocations can be made within `macro_rules!` invocations](https://github.com/rust-lang/rust/pull/34925)
2670 * [`macro_rules!` meta-variables are hygienic](https://github.com/rust-lang/rust/pull/35453)
2671 * [`macro_rules!` `tt` matchers can be reparsed correctly, making them much more
2672 useful](https://github.com/rust-lang/rust/pull/34908)
2673 * [`macro_rules!` `stmt` matchers correctly consume the entire contents when
2674 inside non-braces invocations](https://github.com/rust-lang/rust/pull/34886)
2675 * [Semicolons are properly required as statement delimiters inside
2676 `macro_rules!` invocations](https://github.com/rust-lang/rust/pull/34660)
2677 * [`cfg_attr` works on `path` attributes](https://github.com/rust-lang/rust/pull/34546)
2682 * [`Cell::as_ptr`](https://doc.rust-lang.org/std/cell/struct.Cell.html#method.as_ptr)
2683 * [`RefCell::as_ptr`](https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.as_ptr)
2684 * [`IpAddr::is_unspecified`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_unspecified)
2685 * [`IpAddr::is_loopback`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_loopback)
2686 * [`IpAddr::is_multicast`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_multicast)
2687 * [`Ipv4Addr::is_unspecified`](https://doc.rust-lang.org/std/net/struct.Ipv4Addr.html#method.is_unspecified)
2688 * [`Ipv6Addr::octets`](https://doc.rust-lang.org/std/net/struct.Ipv6Addr.html#method.octets)
2689 * [`LinkedList::contains`](https://doc.rust-lang.org/std/collections/linked_list/struct.LinkedList.html#method.contains)
2690 * [`VecDeque::contains`](https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.contains)
2691 * [`ExitStatusExt::from_raw`](https://doc.rust-lang.org/std/os/unix/process/trait.ExitStatusExt.html#tymethod.from_raw).
2692 Both on Unix and Windows.
2693 * [`Receiver::recv_timeout`](https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.recv_timeout)
2694 * [`RecvTimeoutError`](https://doc.rust-lang.org/std/sync/mpsc/enum.RecvTimeoutError.html)
2695 * [`BinaryHeap::peek_mut`](https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.peek_mut)
2696 * [`PeekMut`](https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html)
2697 * [`iter::Product`](https://doc.rust-lang.org/std/iter/trait.Product.html)
2698 * [`iter::Sum`](https://doc.rust-lang.org/std/iter/trait.Sum.html)
2699 * [`OccupiedEntry::remove_entry`](https://doc.rust-lang.org/std/collections/btree_map/struct.OccupiedEntry.html#method.remove_entry)
2700 * [`VacantEntry::into_key`](https://doc.rust-lang.org/std/collections/btree_map/struct.VacantEntry.html#method.into_key)
2705 * [The `format!` macro and friends now allow a single argument to be formatted
2706 in multiple styles](https://github.com/rust-lang/rust/pull/33642)
2707 * [The lifetime bounds on `[T]::binary_search_by` and
2708 `[T]::binary_search_by_key` have been adjusted to be more flexible](https://github.com/rust-lang/rust/pull/34762)
2709 * [`Option` implements `From` for its contained type](https://github.com/rust-lang/rust/pull/34828)
2710 * [`Cell`, `RefCell` and `UnsafeCell` implement `From` for their contained type](https://github.com/rust-lang/rust/pull/35392)
2711 * [`RwLock` panics if the reader count overflows](https://github.com/rust-lang/rust/pull/35378)
2712 * [`vec_deque::Drain`, `hash_map::Drain` and `hash_set::Drain` are covariant](https://github.com/rust-lang/rust/pull/35354)
2713 * [`vec::Drain` and `binary_heap::Drain` are covariant](https://github.com/rust-lang/rust/pull/34951)
2714 * [`Cow<str>` implements `FromIterator` for `char`, `&str` and `String`](https://github.com/rust-lang/rust/pull/35064)
2715 * [Sockets on Linux are correctly closed in subprocesses via `SOCK_CLOEXEC`](https://github.com/rust-lang/rust/pull/34946)
2716 * [`hash_map::Entry`, `hash_map::VacantEntry` and `hash_map::OccupiedEntry`
2717 implement `Debug`](https://github.com/rust-lang/rust/pull/34937)
2718 * [`btree_map::Entry`, `btree_map::VacantEntry` and `btree_map::OccupiedEntry`
2719 implement `Debug`](https://github.com/rust-lang/rust/pull/34885)
2720 * [`String` implements `AddAssign`](https://github.com/rust-lang/rust/pull/34890)
2721 * [Variadic `extern fn` pointers implement the `Clone`, `PartialEq`, `Eq`,
2722 `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and `fmt::Debug` traits](https://github.com/rust-lang/rust/pull/34879)
2723 * [`FileType` implements `Debug`](https://github.com/rust-lang/rust/pull/34757)
2724 * [References to `Mutex` and `RwLock` are unwind-safe](https://github.com/rust-lang/rust/pull/34756)
2725 * [`mpsc::sync_channel` `Receiver`s return any available message before
2726 reporting a disconnect](https://github.com/rust-lang/rust/pull/34731)
2727 * [Unicode definitions have been updated to 9.0](https://github.com/rust-lang/rust/pull/34599)
2728 * [`env` iterators implement `DoubleEndedIterator`](https://github.com/rust-lang/rust/pull/33312)
2733 * [Support local mirrors of registries](https://github.com/rust-lang/cargo/pull/2857)
2734 * [Add support for command aliases](https://github.com/rust-lang/cargo/pull/2679)
2735 * [Allow `opt-level="s"` / `opt-level="z"` in profile overrides](https://github.com/rust-lang/cargo/pull/3007)
2736 * [Make `cargo doc --open --target` work as expected](https://github.com/rust-lang/cargo/pull/2988)
2737 * [Speed up noop registry updates](https://github.com/rust-lang/cargo/pull/2974)
2738 * [Update OpenSSL](https://github.com/rust-lang/cargo/pull/2971)
2739 * [Fix `--panic=abort` with plugins](https://github.com/rust-lang/cargo/pull/2954)
2740 * [Always pass `-C metadata` to the compiler](https://github.com/rust-lang/cargo/pull/2946)
2741 * [Fix depending on git repos with workspaces](https://github.com/rust-lang/cargo/pull/2938)
2742 * [Add a `--lib` flag to `cargo new`](https://github.com/rust-lang/cargo/pull/2921)
2743 * [Add `http.cainfo` for custom certs](https://github.com/rust-lang/cargo/pull/2917)
2744 * [Indicate the compilation profile after compiling](https://github.com/rust-lang/cargo/pull/2909)
2745 * [Allow enabling features for dependencies with `--features`](https://github.com/rust-lang/cargo/pull/2876)
2746 * [Add `--jobs` flag to `cargo package`](https://github.com/rust-lang/cargo/pull/2867)
2747 * [Add `--dry-run` to `cargo publish`](https://github.com/rust-lang/cargo/pull/2849)
2748 * [Add support for `RUSTDOCFLAGS`](https://github.com/rust-lang/cargo/pull/2794)
2753 * [`panic::catch_unwind` is more optimized](https://github.com/rust-lang/rust/pull/35444)
2754 * [`panic::catch_unwind` no longer accesses thread-local storage on entry](https://github.com/rust-lang/rust/pull/34866)
2759 * [Test binaries now support a `--test-threads` argument to specify the number
2760 of threads used to run tests, and which acts the same as the
2761 `RUST_TEST_THREADS` environment variable](https://github.com/rust-lang/rust/pull/35414)
2762 * [The test runner now emits a warning when tests run over 60 seconds](https://github.com/rust-lang/rust/pull/35405)
2763 * [rustdoc: Fix methods in search results](https://github.com/rust-lang/rust/pull/34752)
2764 * [`rust-lldb` warns about unsupported versions of LLDB](https://github.com/rust-lang/rust/pull/34646)
2765 * [Rust releases now come with source packages that can be installed by rustup
2766 via `rustup component add rust-src`](https://github.com/rust-lang/rust/pull/34366).
2767 The resulting source code can be used by tools and IDES, located in the
2768 sysroot under `lib/rustlib/src`.
2773 * [The compiler can now be built against LLVM 3.9](https://github.com/rust-lang/rust/pull/35594)
2774 * Many minor improvements to the documentation.
2775 * [The Rust exception handling "personality" routine is now written in Rust](https://github.com/rust-lang/rust/pull/34832)
2780 * [When printing Windows `OsStr`s, unpaired surrogate codepoints are escaped
2781 with the lowercase format instead of the uppercase](https://github.com/rust-lang/rust/pull/35084)
2782 * [When formatting strings, if "precision" is specified, the "fill",
2783 "align" and "width" specifiers are no longer ignored](https://github.com/rust-lang/rust/pull/34544)
2784 * [The `Debug` impl for strings no longer escapes all non-ASCII characters](https://github.com/rust-lang/rust/pull/34485)
2787 Version 1.11.0 (2016-08-18)
2788 ===========================
2793 * [`cfg_attr` works on `path` attributes](https://github.com/rust-lang/rust/pull/34546)
2794 * [Support nested `cfg_attr` attributes](https://github.com/rust-lang/rust/pull/34216)
2795 * [Allow statement-generating braced macro invocations at the end of blocks](https://github.com/rust-lang/rust/pull/34436)
2796 * [Macros can be expanded inside of trait definitions](https://github.com/rust-lang/rust/pull/34213)
2797 * [`#[macro_use]` works properly when it is itself expanded from a macro](https://github.com/rust-lang/rust/pull/34032)
2802 * [`BinaryHeap::append`](https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.append)
2803 * [`BTreeMap::append`](https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.append)
2804 * [`BTreeMap::split_off`](https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.split_off)
2805 * [`BTreeSet::append`](https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.append)
2806 * [`BTreeSet::split_off`](https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.split_off)
2807 * [`f32::to_degrees`](https://doc.rust-lang.org/std/primitive.f32.html#method.to_degrees)
2808 (in libcore - previously stabilized in libstd)
2809 * [`f32::to_radians`](https://doc.rust-lang.org/std/primitive.f32.html#method.to_radians)
2810 (in libcore - previously stabilized in libstd)
2811 * [`f64::to_degrees`](https://doc.rust-lang.org/std/primitive.f64.html#method.to_degrees)
2812 (in libcore - previously stabilized in libstd)
2813 * [`f64::to_radians`](https://doc.rust-lang.org/std/primitive.f64.html#method.to_radians)
2814 (in libcore - previously stabilized in libstd)
2815 * [`Iterator::sum`](https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
2816 * [`Iterator::product`](https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
2817 * [`Cell::get_mut`](https://doc.rust-lang.org/std/cell/struct.Cell.html#method.get_mut)
2818 * [`RefCell::get_mut`](https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.get_mut)
2823 * [The `thread_local!` macro supports multiple definitions in a single
2824 invocation, and can apply attributes](https://github.com/rust-lang/rust/pull/34077)
2825 * [`Cow` implements `Default`](https://github.com/rust-lang/rust/pull/34305)
2826 * [`Wrapping` implements binary, octal, lower-hex and upper-hex
2827 `Display` formatting](https://github.com/rust-lang/rust/pull/34190)
2828 * [The range types implement `Hash`](https://github.com/rust-lang/rust/pull/34180)
2829 * [`lookup_host` ignores unknown address types](https://github.com/rust-lang/rust/pull/34067)
2830 * [`assert_eq!` accepts a custom error message, like `assert!` does](https://github.com/rust-lang/rust/pull/33976)
2831 * [The main thread is now called "main" instead of "<main>"](https://github.com/rust-lang/rust/pull/33803)
2836 * [Disallow specifying features of transitive deps](https://github.com/rust-lang/cargo/pull/2821)
2837 * [Add color support for Windows consoles](https://github.com/rust-lang/cargo/pull/2804)
2838 * [Fix `harness = false` on `[lib]` sections](https://github.com/rust-lang/cargo/pull/2795)
2839 * [Don't panic when `links` contains a '.'](https://github.com/rust-lang/cargo/pull/2787)
2840 * [Build scripts can emit warnings](https://github.com/rust-lang/cargo/pull/2630),
2841 and `-vv` prints warnings for all crates.
2842 * [Ignore file locks on OS X NFS mounts](https://github.com/rust-lang/cargo/pull/2720)
2843 * [Don't warn about `package.metadata` keys](https://github.com/rust-lang/cargo/pull/2668).
2844 This provides room for expansion by arbitrary tools.
2845 * [Add support for cdylib crate types](https://github.com/rust-lang/cargo/pull/2741)
2846 * [Prevent publishing crates when files are dirty](https://github.com/rust-lang/cargo/pull/2781)
2847 * [Don't fetch all crates on clean](https://github.com/rust-lang/cargo/pull/2704)
2848 * [Propagate --color option to rustc](https://github.com/rust-lang/cargo/pull/2779)
2849 * [Fix `cargo doc --open` on Windows](https://github.com/rust-lang/cargo/pull/2780)
2850 * [Improve autocompletion](https://github.com/rust-lang/cargo/pull/2772)
2851 * [Configure colors of stderr as well as stdout](https://github.com/rust-lang/cargo/pull/2739)
2856 * [Caching projections speeds up type check dramatically for some
2857 workloads](https://github.com/rust-lang/rust/pull/33816)
2858 * [The default `HashMap` hasher is SipHash 1-3 instead of SipHash 2-4](https://github.com/rust-lang/rust/pull/33940)
2859 This hasher is faster, but is believed to provide sufficient
2860 protection from collision attacks.
2861 * [Comparison of `Ipv4Addr` is 10x faster](https://github.com/rust-lang/rust/pull/33891)
2866 * [Fix empty implementation section on some module pages](https://github.com/rust-lang/rust/pull/34536)
2867 * [Fix inlined renamed re-exports in import lists](https://github.com/rust-lang/rust/pull/34479)
2868 * [Fix search result layout for enum variants and struct fields](https://github.com/rust-lang/rust/pull/34477)
2869 * [Fix issues with source links to external crates](https://github.com/rust-lang/rust/pull/34387)
2870 * [Fix redirect pages for renamed re-exports](https://github.com/rust-lang/rust/pull/34245)
2875 * [rustc is better at finding the MSVC toolchain](https://github.com/rust-lang/rust/pull/34492)
2876 * [When emitting debug info, rustc emits frame pointers for closures,
2877 shims and glue, as it does for all other functions](https://github.com/rust-lang/rust/pull/33909)
2878 * [rust-lldb warns about unsupported versions of LLDB](https://github.com/rust-lang/rust/pull/34646)
2879 * Many more errors have been given error codes and extended
2881 * API documentation continues to be improved, with many new examples
2886 * [rustc no longer hangs when dependencies recursively re-export
2887 submodules](https://github.com/rust-lang/rust/pull/34542)
2888 * [rustc requires LLVM 3.7+](https://github.com/rust-lang/rust/pull/34104)
2889 * [The 'How Safe and Unsafe Interact' chapter of The Rustonomicon was
2890 rewritten](https://github.com/rust-lang/rust/pull/33895)
2891 * [rustc support 16-bit pointer sizes](https://github.com/rust-lang/rust/pull/33460).
2892 No targets use this yet, but it works toward AVR support.
2897 * [`const`s and `static`s may not have unsized types](https://github.com/rust-lang/rust/pull/34443)
2898 * [The new follow-set rules that place restrictions on `macro_rules!`
2899 in order to ensure syntax forward-compatibility have been enabled](https://github.com/rust-lang/rust/pull/33982)
2900 This was an [amendment to RFC 550](https://github.com/rust-lang/rfcs/pull/1384),
2901 and has been a warning since 1.10.
2902 * [`cfg` attribute process has been refactored to fix various bugs](https://github.com/rust-lang/rust/pull/33706).
2903 This causes breakage in some corner cases.
2906 Version 1.10.0 (2016-07-07)
2907 ===========================
2912 * [Allow `concat_idents!` in type positions as well as in expression
2913 positions](https://github.com/rust-lang/rust/pull/33735).
2914 * [`Copy` types are required to have a trivial implementation of `Clone`](https://github.com/rust-lang/rust/pull/33420).
2915 [RFC 1521](https://github.com/rust-lang/rfcs/blob/master/text/1521-copy-clone-semantics.md).
2916 * [Single-variant enums support the `#[repr(..)]` attribute](https://github.com/rust-lang/rust/pull/33355).
2917 * [Fix `#[derive(RustcEncodable)]` in the presence of other `encode` methods](https://github.com/rust-lang/rust/pull/32908).
2918 * [`panic!` can be converted to a runtime abort with the
2919 `-C panic=abort` flag](https://github.com/rust-lang/rust/pull/32900).
2920 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
2921 * [Add a new crate type, 'cdylib'](https://github.com/rust-lang/rust/pull/33553).
2922 cdylibs are dynamic libraries suitable for loading by non-Rust hosts.
2923 [RFC 1510](https://github.com/rust-lang/rfcs/blob/master/text/1510-rdylib.md).
2924 Note that Cargo does not yet directly support cdylibs.
2929 * `os::windows::fs::OpenOptionsExt::access_mode`
2930 * `os::windows::fs::OpenOptionsExt::share_mode`
2931 * `os::windows::fs::OpenOptionsExt::custom_flags`
2932 * `os::windows::fs::OpenOptionsExt::attributes`
2933 * `os::windows::fs::OpenOptionsExt::security_qos_flags`
2934 * `os::unix::fs::OpenOptionsExt::custom_flags`
2935 * [`sync::Weak::new`](http://doc.rust-lang.org/alloc/arc/struct.Weak.html#method.new)
2936 * `Default for sync::Weak`
2937 * [`panic::set_hook`](http://doc.rust-lang.org/std/panic/fn.set_hook.html)
2938 * [`panic::take_hook`](http://doc.rust-lang.org/std/panic/fn.take_hook.html)
2939 * [`panic::PanicInfo`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html)
2940 * [`panic::PanicInfo::payload`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.payload)
2941 * [`panic::PanicInfo::location`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.location)
2942 * [`panic::Location`](http://doc.rust-lang.org/std/panic/struct.Location.html)
2943 * [`panic::Location::file`](http://doc.rust-lang.org/std/panic/struct.Location.html#method.file)
2944 * [`panic::Location::line`](http://doc.rust-lang.org/std/panic/struct.Location.html#method.line)
2945 * [`ffi::CStr::from_bytes_with_nul`](http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul)
2946 * [`ffi::CStr::from_bytes_with_nul_unchecked`](http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul_unchecked)
2947 * [`ffi::FromBytesWithNulError`](http://doc.rust-lang.org/std/ffi/struct.FromBytesWithNulError.html)
2948 * [`fs::Metadata::modified`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.modified)
2949 * [`fs::Metadata::accessed`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.accessed)
2950 * [`fs::Metadata::created`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.created)
2951 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange`
2952 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange_weak`
2953 * `collections::{btree,hash}_map::{Occupied,Vacant,}Entry::key`
2954 * `os::unix::net::{UnixStream, UnixListener, UnixDatagram, SocketAddr}`
2955 * [`SocketAddr::is_unnamed`](http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.is_unnamed)
2956 * [`SocketAddr::as_pathname`](http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.as_pathname)
2957 * [`UnixStream::connect`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.connect)
2958 * [`UnixStream::pair`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.pair)
2959 * [`UnixStream::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.try_clone)
2960 * [`UnixStream::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.local_addr)
2961 * [`UnixStream::peer_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.peer_addr)
2962 * [`UnixStream::set_read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
2963 * [`UnixStream::set_write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
2964 * [`UnixStream::read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
2965 * [`UnixStream::write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
2966 * [`UnixStream::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.set_nonblocking)
2967 * [`UnixStream::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.take_error)
2968 * [`UnixStream::shutdown`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.shutdown)
2969 * Read/Write/RawFd impls for `UnixStream`
2970 * [`UnixListener::bind`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.bind)
2971 * [`UnixListener::accept`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.accept)
2972 * [`UnixListener::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.try_clone)
2973 * [`UnixListener::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.local_addr)
2974 * [`UnixListener::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.set_nonblocking)
2975 * [`UnixListener::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.take_error)
2976 * [`UnixListener::incoming`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.incoming)
2977 * RawFd impls for `UnixListener`
2978 * [`UnixDatagram::bind`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.bind)
2979 * [`UnixDatagram::unbound`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.unbound)
2980 * [`UnixDatagram::pair`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.pair)
2981 * [`UnixDatagram::connect`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.connect)
2982 * [`UnixDatagram::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.try_clone)
2983 * [`UnixDatagram::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.local_addr)
2984 * [`UnixDatagram::peer_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.peer_addr)
2985 * [`UnixDatagram::recv_from`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv_from)
2986 * [`UnixDatagram::recv`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv)
2987 * [`UnixDatagram::send_to`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send_to)
2988 * [`UnixDatagram::send`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send)
2989 * [`UnixDatagram::set_read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_read_timeout)
2990 * [`UnixDatagram::set_write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_write_timeout)
2991 * [`UnixDatagram::read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.read_timeout)
2992 * [`UnixDatagram::write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.write_timeout)
2993 * [`UnixDatagram::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_nonblocking)
2994 * [`UnixDatagram::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.take_error)
2995 * [`UnixDatagram::shutdown`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.shutdown)
2996 * RawFd impls for `UnixDatagram`
2997 * `{BTree,Hash}Map::values_mut`
2998 * [`<[_]>::binary_search_by_key`](http://doc.rust-lang.org/beta/std/primitive.slice.html#method.binary_search_by_key)
3003 * [The `abs_sub` method of floats is deprecated](https://github.com/rust-lang/rust/pull/33664).
3004 The semantics of this minor method are subtle and probably not what
3006 * [Add implementation of Ord for Cell<T> and RefCell<T> where T: Ord](https://github.com/rust-lang/rust/pull/33306).
3007 * [On Linux, if `HashMap`s can't be initialized with `getrandom` they
3008 will fall back to `/dev/urandom` temporarily to avoid blocking
3009 during early boot](https://github.com/rust-lang/rust/pull/33086).
3010 * [Implemented negation for wrapping numerals](https://github.com/rust-lang/rust/pull/33067).
3011 * [Implement `Clone` for `binary_heap::IntoIter`](https://github.com/rust-lang/rust/pull/33050).
3012 * [Implement `Display` and `Hash` for `std::num::Wrapping`](https://github.com/rust-lang/rust/pull/33023).
3013 * [Add `Default` implementation for `&CStr`, `CString`](https://github.com/rust-lang/rust/pull/32990).
3014 * [Implement `From<Vec<T>>` and `Into<Vec<T>>` for `VecDeque<T>`](https://github.com/rust-lang/rust/pull/32866).
3015 * [Implement `Default` for `UnsafeCell`, `fmt::Error`, `Condvar`,
3016 `Mutex`, `RwLock`](https://github.com/rust-lang/rust/pull/32785).
3020 * [Cargo.toml supports the `profile.*.panic` option](https://github.com/rust-lang/cargo/pull/2687).
3021 This controls the runtime behavior of the `panic!` macro
3022 and can be either "unwind" (the default), or "abort".
3023 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
3024 * [Don't throw away errors with `-p` arguments](https://github.com/rust-lang/cargo/pull/2723).
3025 * [Report status to stderr instead of stdout](https://github.com/rust-lang/cargo/pull/2693).
3026 * [Build scripts are passed a `CARGO_MANIFEST_LINKS` environment
3027 variable that corresponds to the `links` field of the manifest](https://github.com/rust-lang/cargo/pull/2710).
3028 * [Ban keywords from crate names](https://github.com/rust-lang/cargo/pull/2707).
3029 * [Canonicalize `CARGO_HOME` on Windows](https://github.com/rust-lang/cargo/pull/2604).
3030 * [Retry network requests](https://github.com/rust-lang/cargo/pull/2396).
3031 By default they are retried twice, which can be customized with the
3032 `net.retry` value in `.cargo/config`.
3033 * [Don't print extra error info for failing subcommands](https://github.com/rust-lang/cargo/pull/2674).
3034 * [Add `--force` flag to `cargo install`](https://github.com/rust-lang/cargo/pull/2405).
3035 * [Don't use `flock` on NFS mounts](https://github.com/rust-lang/cargo/pull/2623).
3036 * [Prefer building `cargo install` artifacts in temporary directories](https://github.com/rust-lang/cargo/pull/2610).
3037 Makes it possible to install multiple crates in parallel.
3038 * [Add `cargo test --doc`](https://github.com/rust-lang/cargo/pull/2578).
3039 * [Add `cargo --explain`](https://github.com/rust-lang/cargo/pull/2551).
3040 * [Don't print warnings when `-q` is passed](https://github.com/rust-lang/cargo/pull/2576).
3041 * [Add `cargo doc --lib` and `--bin`](https://github.com/rust-lang/cargo/pull/2577).
3042 * [Don't require build script output to be UTF-8](https://github.com/rust-lang/cargo/pull/2560).
3043 * [Correctly attempt multiple git usernames](https://github.com/rust-lang/cargo/pull/2584).
3048 * [rustc memory usage was reduced by refactoring the context used for
3049 type checking](https://github.com/rust-lang/rust/pull/33425).
3050 * [Speed up creation of `HashMap`s by caching the random keys used
3051 to initialize the hash state](https://github.com/rust-lang/rust/pull/33318).
3052 * [The `find` implementation for `Chain` iterators is 2x faster](https://github.com/rust-lang/rust/pull/33289).
3053 * [Trait selection optimizations speed up type checking by 15%](https://github.com/rust-lang/rust/pull/33138).
3054 * [Efficient trie lookup for boolean Unicode properties](https://github.com/rust-lang/rust/pull/33098).
3055 10x faster than the previous lookup tables.
3056 * [Special case `#[derive(Copy, Clone)]` to avoid bloat](https://github.com/rust-lang/rust/pull/31414).
3061 * Many incremental improvements to documentation and rustdoc.
3062 * [rustdoc: List blanket trait impls](https://github.com/rust-lang/rust/pull/33514).
3063 * [rustdoc: Clean up ABI rendering](https://github.com/rust-lang/rust/pull/33151).
3064 * [Indexing with the wrong type produces a more informative error](https://github.com/rust-lang/rust/pull/33401).
3065 * [Improve diagnostics for constants being used in irrefutable patterns](https://github.com/rust-lang/rust/pull/33406).
3066 * [When many method candidates are in scope limit the suggestions to 10](https://github.com/rust-lang/rust/pull/33338).
3067 * [Remove confusing suggestion when calling a `fn` type](https://github.com/rust-lang/rust/pull/33325).
3068 * [Do not suggest changing `&mut self` to `&mut mut self`](https://github.com/rust-lang/rust/pull/33319).
3073 * [Update i686-linux-android features to match Android ABI](https://github.com/rust-lang/rust/pull/33651).
3074 * [Update aarch64-linux-android features to match Android ABI](https://github.com/rust-lang/rust/pull/33500).
3075 * [`std` no longer prints backtraces on platforms where the running
3076 module must be loaded with `env::current_exe`, which can't be relied
3077 on](https://github.com/rust-lang/rust/pull/33554).
3078 * This release includes std binaries for the i586-unknown-linux-gnu,
3079 i686-unknown-linux-musl, and armv7-linux-androideabi targets. The
3080 i586 target is for old x86 hardware without SSE2, and the armv7
3081 target is for Android running on modern ARM architectures.
3082 * [The `rust-gdb` and `rust-lldb` scripts are distributed on all
3083 Unix platforms](https://github.com/rust-lang/rust/pull/32835).
3084 * [On Unix the runtime aborts by calling `libc::abort` instead of
3085 generating an illegal instruction](https://github.com/rust-lang/rust/pull/31457).
3086 * [Rust is now bootstrapped from the previous release of Rust,
3087 instead of a snapshot from an arbitrary commit](https://github.com/rust-lang/rust/pull/32942).
3092 * [`AtomicBool` is now bool-sized, not word-sized](https://github.com/rust-lang/rust/pull/33579).
3093 * [`target_env` for Linux ARM targets is just `gnu`, not
3094 `gnueabihf`, `gnueabi`, etc](https://github.com/rust-lang/rust/pull/33403).
3095 * [Consistently panic on overflow in `Duration::new`](https://github.com/rust-lang/rust/pull/33072).
3096 * [Change `String::truncate` to panic less](https://github.com/rust-lang/rust/pull/32977).
3097 * [Add `:block` to the follow set for `:ty` and `:path`](https://github.com/rust-lang/rust/pull/32945).
3098 Affects how macros are parsed.
3099 * [Fix macro hygiene bug](https://github.com/rust-lang/rust/pull/32923).
3100 * [Feature-gated attributes on macro-generated macro invocations are
3101 now rejected](https://github.com/rust-lang/rust/pull/32791).
3102 * [Suppress fallback and ambiguity errors during type inference](https://github.com/rust-lang/rust/pull/32258).
3103 This caused some minor changes to type inference.
3106 Version 1.9.0 (2016-05-26)
3107 ==========================
3112 * The `#[deprecated]` attribute when applied to an API will generate
3113 warnings when used. The warnings may be suppressed with
3114 `#[allow(deprecated)]`. [RFC 1270].
3115 * [`fn` item types are zero sized, and each `fn` names a unique
3116 type][1.9fn]. This will break code that transmutes `fn`s, so calling
3117 `transmute` on a `fn` type will generate a warning for a few cycles,
3118 then will be converted to an error.
3119 * [Field and method resolution understand visibility, so private
3120 fields and methods cannot prevent the proper use of public fields
3121 and methods][1.9fv].
3122 * [The parser considers unicode codepoints in the
3123 `PATTERN_WHITE_SPACE` category to be whitespace][1.9ws].
3129 * [`std::panic::catch_unwind`][] (renamed from `recover`)
3130 * [`std::panic::resume_unwind`][] (renamed from `propagate`)
3131 * [`std::panic::AssertUnwindSafe`][] (renamed from `AssertRecoverSafe`)
3132 * [`std::panic::UnwindSafe`][] (renamed from `RecoverSafe`)
3133 * [`str::is_char_boundary`]
3134 * [`<*const T>::as_ref`]
3135 * [`<*mut T>::as_ref`]
3136 * [`<*mut T>::as_mut`]
3137 * [`AsciiExt::make_ascii_uppercase`]
3138 * [`AsciiExt::make_ascii_lowercase`]
3139 * [`char::decode_utf16`]
3140 * [`char::DecodeUtf16`]
3141 * [`char::DecodeUtf16Error`]
3142 * [`char::DecodeUtf16Error::unpaired_surrogate`]
3143 * [`BTreeSet::take`]
3144 * [`BTreeSet::replace`]
3147 * [`HashSet::replace`]
3149 * [`OsString::with_capacity`]
3150 * [`OsString::clear`]
3151 * [`OsString::capacity`]
3152 * [`OsString::reserve`]
3153 * [`OsString::reserve_exact`]
3154 * [`OsStr::is_empty`]
3156 * [`std::os::unix::thread`]
3159 * [`JoinHandleExt::as_pthread_t`]
3160 * [`JoinHandleExt::into_pthread_t`]
3161 * [`HashSet::hasher`]
3162 * [`HashMap::hasher`]
3163 * [`CommandExt::exec`]
3164 * [`File::try_clone`]
3165 * [`SocketAddr::set_ip`]
3166 * [`SocketAddr::set_port`]
3167 * [`SocketAddrV4::set_ip`]
3168 * [`SocketAddrV4::set_port`]
3169 * [`SocketAddrV6::set_ip`]
3170 * [`SocketAddrV6::set_port`]
3171 * [`SocketAddrV6::set_flowinfo`]
3172 * [`SocketAddrV6::set_scope_id`]
3173 * [`slice::copy_from_slice`]
3174 * [`ptr::read_volatile`]
3175 * [`ptr::write_volatile`]
3176 * [`OpenOptions::create_new`]
3177 * [`TcpStream::set_nodelay`]
3178 * [`TcpStream::nodelay`]
3179 * [`TcpStream::set_ttl`]
3180 * [`TcpStream::ttl`]
3181 * [`TcpStream::set_only_v6`]
3182 * [`TcpStream::only_v6`]
3183 * [`TcpStream::take_error`]
3184 * [`TcpStream::set_nonblocking`]
3185 * [`TcpListener::set_ttl`]
3186 * [`TcpListener::ttl`]
3187 * [`TcpListener::set_only_v6`]
3188 * [`TcpListener::only_v6`]
3189 * [`TcpListener::take_error`]
3190 * [`TcpListener::set_nonblocking`]
3191 * [`UdpSocket::set_broadcast`]
3192 * [`UdpSocket::broadcast`]
3193 * [`UdpSocket::set_multicast_loop_v4`]
3194 * [`UdpSocket::multicast_loop_v4`]
3195 * [`UdpSocket::set_multicast_ttl_v4`]
3196 * [`UdpSocket::multicast_ttl_v4`]
3197 * [`UdpSocket::set_multicast_loop_v6`]
3198 * [`UdpSocket::multicast_loop_v6`]
3199 * [`UdpSocket::set_multicast_ttl_v6`]
3200 * [`UdpSocket::multicast_ttl_v6`]
3201 * [`UdpSocket::set_ttl`]
3202 * [`UdpSocket::ttl`]
3203 * [`UdpSocket::set_only_v6`]
3204 * [`UdpSocket::only_v6`]
3205 * [`UdpSocket::join_multicast_v4`]
3206 * [`UdpSocket::join_multicast_v6`]
3207 * [`UdpSocket::leave_multicast_v4`]
3208 * [`UdpSocket::leave_multicast_v6`]
3209 * [`UdpSocket::take_error`]
3210 * [`UdpSocket::connect`]
3211 * [`UdpSocket::send`]
3212 * [`UdpSocket::recv`]
3213 * [`UdpSocket::set_nonblocking`]
3218 * [`std::sync::Once` is poisoned if its initialization function
3220 * [`cell::Ref` and `cell::RefMut` can contain unsized types][1.9cu].
3221 * [Most types implement `fmt::Debug`][1.9db].
3222 * [The default buffer size used by `BufReader` and `BufWriter` was
3223 reduced to 8K, from 64K][1.9bf]. This is in line with the buffer size
3224 used by other languages.
3225 * [`Instant`, `SystemTime` and `Duration` implement `+=` and `-=`.
3226 `Duration` additionally implements `*=` and `/=`][1.9ta].
3227 * [`Skip` is a `DoubleEndedIterator`][1.9sk].
3228 * [`From<[u8; 4]>` is implemented for `Ipv4Addr`][1.9fi].
3229 * [`Chain` implements `BufRead`][1.9ch].
3230 * [`HashMap`, `HashSet` and iterators are covariant][1.9hc].
3235 * [Cargo can now run concurrently][1.9cc].
3236 * [Top-level overrides allow specific revisions of crates to be
3237 overridden through the entire crate graph][1.9ct]. This is intended
3238 to make upgrades easier for large projects, by allowing crates to be
3239 forked temporarily until they've been upgraded and republished.
3240 * [Cargo exports a `CARGO_PKG_AUTHORS` environment variable][1.9cp].
3241 * [Cargo will pass the contents of the `RUSTFLAGS` variable to `rustc`
3242 on the commandline][1.9cf]. `rustc` arguments can also be specified
3243 in the `build.rustflags` configuration key.
3248 * [The time complexity of comparing variables for equivalence during type
3249 unification is reduced from _O_(_n_!) to _O_(_n_)][1.9tu]. This leads
3250 to major compilation time improvement in some scenarios.
3251 * [`ToString` is specialized for `str`, giving it the same performance
3252 as `to_owned`][1.9ts].
3253 * [Spawning processes with `Command::output` no longer creates extra
3255 * [`#[derive(PartialEq)]` and `#[derive(PartialOrd)]` emit less code
3256 for C-like enums][1.9cl].
3261 * [Passing the `--quiet` flag to a test runner will produce
3262 much-abbreviated output][1.9q].
3263 * The Rust Project now publishes std binaries for the
3264 `mips-unknown-linux-musl`, `mipsel-unknown-linux-musl`, and
3265 `i586-pc-windows-msvc` targets.
3270 * [`std::sync::Once` is poisoned if its initialization function
3272 * [It is illegal to define methods with the same name in overlapping
3273 inherent `impl` blocks][1.9sn].
3274 * [`fn` item types are zero sized, and each `fn` names a unique
3275 type][1.9fn]. This will break code that transmutes `fn`s, so calling
3276 `transmute` on a `fn` type will generate a warning for a few cycles,
3277 then will be converted to an error.
3278 * [Improvements to const evaluation may trigger new errors when integer
3279 literals are out of range][1.9ce].
3282 [1.9bf]: https://github.com/rust-lang/rust/pull/32695
3283 [1.9cc]: https://github.com/rust-lang/cargo/pull/2486
3284 [1.9ce]: https://github.com/rust-lang/rust/pull/30587
3285 [1.9cf]: https://github.com/rust-lang/cargo/pull/2241
3286 [1.9ch]: https://github.com/rust-lang/rust/pull/32541
3287 [1.9cl]: https://github.com/rust-lang/rust/pull/31977
3288 [1.9cp]: https://github.com/rust-lang/cargo/pull/2465
3289 [1.9ct]: https://github.com/rust-lang/cargo/pull/2385
3290 [1.9cu]: https://github.com/rust-lang/rust/pull/32652
3291 [1.9db]: https://github.com/rust-lang/rust/pull/32054
3292 [1.9fi]: https://github.com/rust-lang/rust/pull/32050
3293 [1.9fn]: https://github.com/rust-lang/rust/pull/31710
3294 [1.9fv]: https://github.com/rust-lang/rust/pull/31938
3295 [1.9hc]: https://github.com/rust-lang/rust/pull/32635
3296 [1.9o]: https://github.com/rust-lang/rust/pull/32325
3297 [1.9q]: https://github.com/rust-lang/rust/pull/31887
3298 [1.9sk]: https://github.com/rust-lang/rust/pull/31700
3299 [1.9sn]: https://github.com/rust-lang/rust/pull/31925
3300 [1.9sp]: https://github.com/rust-lang/rust/pull/31618
3301 [1.9ta]: https://github.com/rust-lang/rust/pull/32448
3302 [1.9ts]: https://github.com/rust-lang/rust/pull/32586
3303 [1.9tu]: https://github.com/rust-lang/rust/pull/32062
3304 [1.9ws]: https://github.com/rust-lang/rust/pull/29734
3305 [RFC 1270]: https://github.com/rust-lang/rfcs/blob/master/text/1270-deprecation.md
3306 [`<*const T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
3307 [`<*mut T>::as_mut`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_mut
3308 [`<*mut T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
3309 [`slice::copy_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.copy_from_slice
3310 [`AsciiExt::make_ascii_lowercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_lowercase
3311 [`AsciiExt::make_ascii_uppercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_uppercase
3312 [`BTreeSet::get`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.get
3313 [`BTreeSet::replace`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.replace
3314 [`BTreeSet::take`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.take
3315 [`CommandExt::exec`]: http://doc.rust-lang.org/nightly/std/os/unix/process/trait.CommandExt.html#tymethod.exec
3316 [`File::try_clone`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html#method.try_clone
3317 [`HashMap::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.hasher
3318 [`HashSet::get`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.get
3319 [`HashSet::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.hasher
3320 [`HashSet::replace`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.replace
3321 [`HashSet::take`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.take
3322 [`JoinHandleExt::as_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.as_pthread_t
3323 [`JoinHandleExt::into_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.into_pthread_t
3324 [`JoinHandleExt`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html
3325 [`OpenOptions::create_new`]: http://doc.rust-lang.org/nightly/std/fs/struct.OpenOptions.html#method.create_new
3326 [`OsStr::is_empty`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.is_empty
3327 [`OsStr::len`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.len
3328 [`OsString::capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.capacity
3329 [`OsString::clear`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.clear
3330 [`OsString::reserve_exact`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve_exact
3331 [`OsString::reserve`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve
3332 [`OsString::with_capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.with_capacity
3333 [`RawPthread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/type.RawPthread.html
3334 [`SocketAddr::set_ip`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_ip
3335 [`SocketAddr::set_port`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_port
3336 [`SocketAddrV4::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_ip
3337 [`SocketAddrV4::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_port
3338 [`SocketAddrV6::set_flowinfo`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_flowinfo
3339 [`SocketAddrV6::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_ip
3340 [`SocketAddrV6::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_port
3341 [`SocketAddrV6::set_scope_id`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_scope_id
3342 [`TcpListener::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
3343 [`TcpListener::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
3344 [`TcpListener::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
3345 [`TcpListener::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
3346 [`TcpListener::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
3347 [`TcpListener::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
3348 [`TcpStream::nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.nodelay
3349 [`TcpStream::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
3350 [`TcpStream::set_nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nodelay
3351 [`TcpStream::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
3352 [`TcpStream::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
3353 [`TcpStream::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
3354 [`TcpStream::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
3355 [`TcpStream::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
3356 [`UdpSocket::broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.broadcast
3357 [`UdpSocket::connect`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.connect
3358 [`UdpSocket::join_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v4
3359 [`UdpSocket::join_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v6
3360 [`UdpSocket::leave_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v4
3361 [`UdpSocket::leave_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v6
3362 [`UdpSocket::multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v4
3363 [`UdpSocket::multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v6
3364 [`UdpSocket::multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v4
3365 [`UdpSocket::multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v6
3366 [`UdpSocket::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.only_v6
3367 [`UdpSocket::recv`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.recv
3368 [`UdpSocket::send`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.send
3369 [`UdpSocket::set_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_broadcast
3370 [`UdpSocket::set_multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v4
3371 [`UdpSocket::set_multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v6
3372 [`UdpSocket::set_multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v4
3373 [`UdpSocket::set_multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v6
3374 [`UdpSocket::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_nonblocking
3375 [`UdpSocket::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_only_v6
3376 [`UdpSocket::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_ttl
3377 [`UdpSocket::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.take_error
3378 [`UdpSocket::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.ttl
3379 [`char::DecodeUtf16Error::unpaired_surrogate`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html#method.unpaired_surrogate
3380 [`char::DecodeUtf16Error`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html
3381 [`char::DecodeUtf16`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16.html
3382 [`char::decode_utf16`]: http://doc.rust-lang.org/nightly/std/char/fn.decode_utf16.html
3383 [`ptr::read_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.read_volatile.html
3384 [`ptr::write_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.write_volatile.html
3385 [`std::os::unix::thread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/index.html
3386 [`std::panic::AssertUnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/struct.AssertUnwindSafe.html
3387 [`std::panic::UnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/trait.UnwindSafe.html
3388 [`std::panic::catch_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.catch_unwind.html
3389 [`std::panic::resume_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.resume_unwind.html
3390 [`std::panic`]: http://doc.rust-lang.org/nightly/std/panic/index.html
3391 [`str::is_char_boundary`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.is_char_boundary
3394 Version 1.8.0 (2016-04-14)
3395 ==========================
3400 * Rust supports overloading of compound assignment statements like
3401 `+=` by implementing the [`AddAssign`], [`SubAssign`],
3402 [`MulAssign`], [`DivAssign`], [`RemAssign`], [`BitAndAssign`],
3403 [`BitOrAssign`], [`BitXorAssign`], [`ShlAssign`], or [`ShrAssign`]
3405 * Empty structs can be defined with braces, as in `struct Foo { }`, in
3406 addition to the non-braced form, `struct Foo;`. [RFC 218].
3412 * [`str::encode_utf16`][] (renamed from `utf16_units`)
3413 * [`str::EncodeUtf16`][] (renamed from `Utf16Units`)
3416 * [`ptr::drop_in_place`]
3418 * [`time::SystemTime`]
3420 * [`Instant::duration_since`][] (renamed from `duration_from_earlier`)
3421 * [`Instant::elapsed`]
3422 * [`SystemTime::now`]
3423 * [`SystemTime::duration_since`][] (renamed from `duration_from_earlier`)
3424 * [`SystemTime::elapsed`]
3425 * Various `Add`/`Sub` impls for `Time` and `SystemTime`
3426 * [`SystemTimeError`]
3427 * [`SystemTimeError::duration`]
3428 * Various impls for `SystemTimeError`
3430 * [`AddAssign`], [`SubAssign`], [`MulAssign`], [`DivAssign`],
3431 [`RemAssign`], [`BitAndAssign`], [`BitOrAssign`],
3432 [`BitXorAssign`], [`ShlAssign`], [`ShrAssign`].
3433 * [The `write!` and `writeln!` macros correctly emit errors if any of
3434 their arguments can't be formatted][1.8w].
3435 * [Various I/O functions support large files on 32-bit Linux][1.8l].
3436 * [The Unix-specific `raw` modules, which contain a number of
3437 redefined C types are deprecated][1.8r], including `os::raw::unix`,
3438 `os::raw::macos`, and `os::raw::linux`. These modules defined types
3439 such as `ino_t` and `dev_t`. The inconsistency of these definitions
3440 across platforms was making it difficult to implement `std`
3441 correctly. Those that need these definitions should use the `libc`
3443 * The Unix-specific `MetadataExt` traits, including
3444 `os::unix::fs::MetadataExt`, which expose values such as inode
3445 numbers [no longer return platform-specific types][1.8r], but
3446 instead return widened integers. [RFC 1415].
3447 * [`btree_set::{IntoIter, Iter, Range}` are covariant][1.8cv].
3448 * [Atomic loads and stores are not volatile][1.8a].
3449 * [All types in `sync::mpsc` implement `fmt::Debug`][1.8mp].
3454 * [Inlining hash functions lead to a 3% compile-time improvement in
3455 some workloads][1.8h].
3456 * When using jemalloc, its symbols are [unprefixed so that it
3457 overrides the libc malloc implementation][1.8h]. This means that for
3458 rustc, LLVM is now using jemalloc, which results in a 6%
3459 compile-time improvement on a specific workload.
3460 * [Avoid quadratic growth in function size due to cleanups][1.8cu].
3465 * [32-bit MSVC builds finally implement unwinding][1.8ms].
3466 i686-pc-windows-msvc is now considered a tier-1 platform.
3467 * [The `--print targets` flag prints a list of supported targets][1.8t].
3468 * [The `--print cfg` flag prints the `cfg`s defined for the current
3470 * [`rustc` can be built with an new Cargo-based build system, written
3471 in Rust][1.8b]. It will eventually replace Rust's Makefile-based
3472 build system. To enable it configure with `configure --rustbuild`.
3473 * [Errors for non-exhaustive `match` patterns now list up to 3 missing
3474 variants while also indicating the total number of missing variants
3475 if more than 3][1.8m].
3476 * [Executable stacks are disabled on Linux and BSD][1.8nx].
3477 * The Rust Project now publishes binary releases of the standard
3478 library for a number of tier-2 targets:
3479 `armv7-unknown-linux-gnueabihf`, `powerpc-unknown-linux-gnu`,
3480 `powerpc64-unknown-linux-gnu`, `powerpc64le-unknown-linux-gnu`
3481 `x86_64-rumprun-netbsd`. These can be installed with
3482 tools such as [multirust][1.8mr].
3487 * [`cargo init` creates a new Cargo project in the current
3488 directory][1.8ci]. It is otherwise like `cargo new`.
3489 * [Cargo has configuration keys for `-v` and
3490 `--color`][1.8cc]. `verbose` and `color`, respectively, go in the
3491 `[term]` section of `.cargo/config`.
3492 * [Configuration keys that evaluate to strings or integers can be set
3493 via environment variables][1.8ce]. For example the `build.jobs` key
3494 can be set via `CARGO_BUILD_JOBS`. Environment variables take
3495 precedence over config files.
3496 * [Target-specific dependencies support Rust `cfg` syntax for
3497 describing targets][1.8cfg] so that dependencies for multiple
3498 targets can be specified together. [RFC 1361].
3499 * [The environment variables `CARGO_TARGET_ROOT`, `RUSTC`, and
3500 `RUSTDOC` take precedence over the `build.target-dir`,
3501 `build.rustc`, and `build.rustdoc` configuration values][1.8cv].
3502 * [The child process tree is killed on Windows when Cargo is
3504 * [The `build.target` configuration value sets the target platform,
3505 like `--target`][1.8ct].
3510 * [Unstable compiler flags have been further restricted][1.8u]. Since
3511 1.0 `-Z` flags have been considered unstable, and other flags that
3512 were considered unstable additionally required passing `-Z
3513 unstable-options` to access. Unlike unstable language and library
3514 features though, these options have been accessible on the stable
3515 release channel. Going forward, *new unstable flags will not be
3516 available on the stable release channel*, and old unstable flags
3517 will warn about their usage. In the future, all unstable flags will
3518 be unavailable on the stable release channel.
3519 * [It is no longer possible to `match` on empty enum variants using
3520 the `Variant(..)` syntax][1.8v]. This has been a warning since 1.6.
3521 * The Unix-specific `MetadataExt` traits, including
3522 `os::unix::fs::MetadataExt`, which expose values such as inode
3523 numbers [no longer return platform-specific types][1.8r], but
3524 instead return widened integers. [RFC 1415].
3525 * [Modules sourced from the filesystem cannot appear within arbitrary
3526 blocks, but only within other modules][1.8mf].
3527 * [`--cfg` compiler flags are parsed strictly as identifiers][1.8c].
3528 * On Unix, [stack overflow triggers a runtime abort instead of a
3530 * [`Command::spawn` and its equivalents return an error if any of
3531 its command-line arguments contain interior `NUL`s][1.8n].
3532 * [Tuple and unit enum variants from other crates are in the type
3534 * [On Windows `rustc` emits `.lib` files for the `staticlib` library
3535 type instead of `.a` files][1.8st]. Additionally, for the MSVC
3536 toolchain, `rustc` emits import libraries named `foo.dll.lib`
3537 instead of `foo.lib`.
3540 [1.8a]: https://github.com/rust-lang/rust/pull/30962
3541 [1.8b]: https://github.com/rust-lang/rust/pull/31123
3542 [1.8c]: https://github.com/rust-lang/rust/pull/31530
3543 [1.8cc]: https://github.com/rust-lang/cargo/pull/2397
3544 [1.8ce]: https://github.com/rust-lang/cargo/pull/2398
3545 [1.8cf]: https://github.com/rust-lang/rust/pull/31278
3546 [1.8cfg]: https://github.com/rust-lang/cargo/pull/2328
3547 [1.8ci]: https://github.com/rust-lang/cargo/pull/2081
3548 [1.8ck]: https://github.com/rust-lang/cargo/pull/2370
3549 [1.8ct]: https://github.com/rust-lang/cargo/pull/2335
3550 [1.8cu]: https://github.com/rust-lang/rust/pull/31390
3551 [1.8cv]: https://github.com/rust-lang/cargo/issues/2365
3552 [1.8cv]: https://github.com/rust-lang/rust/pull/30998
3553 [1.8h]: https://github.com/rust-lang/rust/pull/31460
3554 [1.8l]: https://github.com/rust-lang/rust/pull/31668
3555 [1.8m]: https://github.com/rust-lang/rust/pull/31020
3556 [1.8mf]: https://github.com/rust-lang/rust/pull/31534
3557 [1.8mp]: https://github.com/rust-lang/rust/pull/30894
3558 [1.8mr]: https://users.rust-lang.org/t/multirust-0-8-with-cross-std-installation/4901
3559 [1.8ms]: https://github.com/rust-lang/rust/pull/30448
3560 [1.8n]: https://github.com/rust-lang/rust/pull/31056
3561 [1.8nx]: https://github.com/rust-lang/rust/pull/30859
3562 [1.8r]: https://github.com/rust-lang/rust/pull/31551
3563 [1.8so]: https://github.com/rust-lang/rust/pull/31333
3564 [1.8st]: https://github.com/rust-lang/rust/pull/29520
3565 [1.8t]: https://github.com/rust-lang/rust/pull/31358
3566 [1.8tn]: https://github.com/rust-lang/rust/pull/30882
3567 [1.8u]: https://github.com/rust-lang/rust/pull/31793
3568 [1.8v]: https://github.com/rust-lang/rust/pull/31757
3569 [1.8w]: https://github.com/rust-lang/rust/pull/31904
3570 [RFC 1361]: https://github.com/rust-lang/rfcs/blob/master/text/1361-cargo-cfg-dependencies.md
3571 [RFC 1415]: https://github.com/rust-lang/rfcs/blob/master/text/1415-trim-std-os.md
3572 [RFC 218]: https://github.com/rust-lang/rfcs/blob/master/text/0218-empty-struct-with-braces.md
3573 [RFC 953]: https://github.com/rust-lang/rfcs/blob/master/text/0953-op-assign.md
3574 [`AddAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.AddAssign.html
3575 [`BitAndAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitAndAssign.html
3576 [`BitOrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitOrAssign.html
3577 [`BitXorAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitXorAssign.html
3578 [`DivAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.DivAssign.html
3579 [`Instant::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.duration_since
3580 [`Instant::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.elapsed
3581 [`Instant::now`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.now
3582 [`MulAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.MulAssign.html
3583 [`Ref::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.Ref.html#method.map
3584 [`RefMut::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.RefMut.html#method.map
3585 [`RemAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.RemAssign.html
3586 [`ShlAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShlAssign.html
3587 [`ShrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShrAssign.html
3588 [`SubAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.SubAssign.html
3589 [`SystemTime::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.duration_since
3590 [`SystemTime::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.elapsed
3591 [`SystemTime::now`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.now
3592 [`SystemTimeError::duration`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html#method.duration
3593 [`SystemTimeError`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html
3594 [`UNIX_EPOCH`]: http://doc.rust-lang.org/nightly/std/time/constant.UNIX_EPOCH.html
3595 [`ptr::drop_in_place`]: http://doc.rust-lang.org/nightly/std/ptr/fn.drop_in_place.html
3596 [`str::EncodeUtf16`]: http://doc.rust-lang.org/nightly/std/str/struct.EncodeUtf16.html
3597 [`str::encode_utf16`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.encode_utf16
3598 [`time::Instant`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html
3599 [`time::SystemTime`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html
3602 Version 1.7.0 (2016-03-03)
3603 ==========================
3610 * [`Path::strip_prefix`][] (renamed from relative_from)
3611 * [`path::StripPrefixError`][] (new error type returned from strip_prefix)
3613 * [`Ipv4Addr::is_loopback`]
3614 * [`Ipv4Addr::is_private`]
3615 * [`Ipv4Addr::is_link_local`]
3616 * [`Ipv4Addr::is_multicast`]
3617 * [`Ipv4Addr::is_broadcast`]
3618 * [`Ipv4Addr::is_documentation`]
3620 * [`Ipv6Addr::is_unspecified`]
3621 * [`Ipv6Addr::is_loopback`]
3622 * [`Ipv6Addr::is_multicast`]
3625 * [`Vec::as_mut_slice`]
3627 * [`String::as_str`]
3628 * [`String::as_mut_str`]
3630 * `<[T]>::`[`clone_from_slice`], which now requires the two slices to
3632 * `<[T]>::`[`sort_by_key`]
3633 * checked, saturated, and overflowing operations
3634 * [`i32::checked_rem`], [`i32::checked_neg`], [`i32::checked_shl`], [`i32::checked_shr`]
3635 * [`i32::saturating_mul`]
3636 * [`i32::overflowing_add`], [`i32::overflowing_sub`], [`i32::overflowing_mul`], [`i32::overflowing_div`]
3637 * [`i32::overflowing_rem`], [`i32::overflowing_neg`], [`i32::overflowing_shl`], [`i32::overflowing_shr`]
3638 * [`u32::checked_rem`], [`u32::checked_neg`], [`u32::checked_shl`], [`u32::checked_shl`]
3639 * [`u32::saturating_mul`]
3640 * [`u32::overflowing_add`], [`u32::overflowing_sub`], [`u32::overflowing_mul`], [`u32::overflowing_div`]
3641 * [`u32::overflowing_rem`], [`u32::overflowing_neg`], [`u32::overflowing_shl`], [`u32::overflowing_shr`]
3642 * and checked, saturated, and overflowing operations for other primitive types
3644 * [`ffi::IntoStringError`]
3645 * [`CString::into_string`]
3646 * [`CString::into_bytes`]
3647 * [`CString::into_bytes_with_nul`]
3648 * `From<CString> for Vec<u8>`
3650 * [`IntoStringError::into_cstring`]
3651 * [`IntoStringError::utf8_error`]
3652 * `Error for IntoStringError`
3654 * [`std::hash::BuildHasher`]
3655 * [`BuildHasher::Hasher`]
3656 * [`BuildHasher::build_hasher`]
3657 * [`std::hash::BuildHasherDefault`]
3658 * [`HashMap::with_hasher`]
3659 * [`HashMap::with_capacity_and_hasher`]
3660 * [`HashSet::with_hasher`]
3661 * [`HashSet::with_capacity_and_hasher`]
3662 * [`std::collections::hash_map::RandomState`]
3663 * [`RandomState::new`]
3664 * [Validating UTF-8 is faster by a factor of between 7 and 14x for
3665 ASCII input][1.7utf8]. This means that creating `String`s and `str`s
3666 from bytes is faster.
3667 * [The performance of `LineWriter` (and thus `io::stdout`) was
3668 improved by using `memchr` to search for newlines][1.7m].
3669 * [`f32::to_degrees` and `f32::to_radians` are stable][1.7f]. The
3670 `f64` variants were stabilized previously.
3671 * [`BTreeMap` was rewritten to use less memory and improve the performance
3672 of insertion and iteration, the latter by as much as 5x][1.7bm].
3673 * [`BTreeSet` and its iterators, `Iter`, `IntoIter`, and `Range` are
3674 covariant over their contained type][1.7bt].
3675 * [`LinkedList` and its iterators, `Iter` and `IntoIter` are covariant
3676 over their contained type][1.7ll].
3677 * [`str::replace` now accepts a `Pattern`][1.7rp], like other string
3679 * [`Any` is implemented for unsized types][1.7a].
3680 * [`Hash` is implemented for `Duration`][1.7h].
3685 * [When running tests with `--test`, rustdoc will pass `--cfg`
3686 arguments to the compiler][1.7dt].
3687 * [The compiler is built with RPATH information by default][1.7rpa].
3688 This means that it will be possible to run `rustc` when installed in
3689 unusual configurations without configuring the dynamic linker search
3691 * [`rustc` passes `--enable-new-dtags` to GNU ld][1.7dta]. This makes
3692 any RPATH entries (emitted with `-C rpath`) *not* take precedence
3693 over `LD_LIBRARY_PATH`.
3698 * [`cargo rustc` accepts a `--profile` flag that runs `rustc` under
3699 any of the compilation profiles, 'dev', 'bench', or 'test'][1.7cp].
3700 * [The `rerun-if-changed` build script directive no longer causes the
3701 build script to incorrectly run twice in certain scenarios][1.7rr].
3706 * Soundness fixes to the interactions between associated types and
3707 lifetimes, specified in [RFC 1214], [now generate errors][1.7sf] for
3708 code that violates the new rules. This is a significant change that
3709 is known to break existing code, so it has emitted warnings for the
3710 new error cases since 1.4 to give crate authors time to adapt. The
3711 details of what is changing are subtle; read the RFC for more.
3712 * [Several bugs in the compiler's visibility calculations were
3713 fixed][1.7v]. Since this was found to break significant amounts of
3714 code, the new errors will be emitted as warnings for several release
3715 cycles, under the `private_in_public` lint.
3716 * Defaulted type parameters were accidentally accepted in positions
3717 that were not intended. In this release, [defaulted type parameters
3718 appearing outside of type definitions will generate a
3719 warning][1.7d], which will become an error in future releases.
3720 * [Parsing "." as a float results in an error instead of 0][1.7p].
3721 That is, `".".parse::<f32>()` returns `Err`, not `Ok(0.0)`.
3722 * [Borrows of closure parameters may not outlive the closure][1.7bc].
3724 [1.7a]: https://github.com/rust-lang/rust/pull/30928
3725 [1.7bc]: https://github.com/rust-lang/rust/pull/30341
3726 [1.7bm]: https://github.com/rust-lang/rust/pull/30426
3727 [1.7bt]: https://github.com/rust-lang/rust/pull/30998
3728 [1.7cp]: https://github.com/rust-lang/cargo/pull/2224
3729 [1.7d]: https://github.com/rust-lang/rust/pull/30724
3730 [1.7dt]: https://github.com/rust-lang/rust/pull/30372
3731 [1.7dta]: https://github.com/rust-lang/rust/pull/30394
3732 [1.7f]: https://github.com/rust-lang/rust/pull/30672
3733 [1.7h]: https://github.com/rust-lang/rust/pull/30818
3734 [1.7ll]: https://github.com/rust-lang/rust/pull/30663
3735 [1.7m]: https://github.com/rust-lang/rust/pull/30381
3736 [1.7p]: https://github.com/rust-lang/rust/pull/30681
3737 [1.7rp]: https://github.com/rust-lang/rust/pull/29498
3738 [1.7rpa]: https://github.com/rust-lang/rust/pull/30353
3739 [1.7rr]: https://github.com/rust-lang/cargo/pull/2279
3740 [1.7sf]: https://github.com/rust-lang/rust/pull/30389
3741 [1.7utf8]: https://github.com/rust-lang/rust/pull/30740
3742 [1.7v]: https://github.com/rust-lang/rust/pull/29973
3743 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
3744 [`BuildHasher::Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
3745 [`BuildHasher::build_hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html#tymethod.build_hasher
3746 [`CString::into_bytes_with_nul`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes_with_nul
3747 [`CString::into_bytes`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes
3748 [`CString::into_string`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_string
3749 [`HashMap::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_capacity_and_hasher
3750 [`HashMap::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_hasher
3751 [`HashSet::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_capacity_and_hasher
3752 [`HashSet::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_hasher
3753 [`IntoStringError::into_cstring`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.into_cstring
3754 [`IntoStringError::utf8_error`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.utf8_error
3755 [`Ipv4Addr::is_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_broadcast
3756 [`Ipv4Addr::is_documentation`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_documentation
3757 [`Ipv4Addr::is_link_local`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_link_local
3758 [`Ipv4Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_loopback
3759 [`Ipv4Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_multicast
3760 [`Ipv4Addr::is_private`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_private
3761 [`Ipv6Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_loopback
3762 [`Ipv6Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_multicast
3763 [`Ipv6Addr::is_unspecified`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_unspecified
3764 [`Path::strip_prefix`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.strip_prefix
3765 [`RandomState::new`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html#method.new
3766 [`String::as_mut_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_mut_str
3767 [`String::as_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_str
3768 [`Vec::as_mut_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_mut_slice
3769 [`Vec::as_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_slice
3770 [`clone_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.clone_from_slice
3771 [`ffi::IntoStringError`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html
3772 [`i32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_neg
3773 [`i32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_rem
3774 [`i32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shl
3775 [`i32::checked_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shr
3776 [`i32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_add
3777 [`i32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_div
3778 [`i32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_mul
3779 [`i32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_neg
3780 [`i32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_rem
3781 [`i32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shl
3782 [`i32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shr
3783 [`i32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_sub
3784 [`i32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.saturating_mul
3785 [`path::StripPrefixError`]: http://doc.rust-lang.org/nightly/std/path/struct.StripPrefixError.html
3786 [`sort_by_key`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.sort_by_key
3787 [`std::collections::hash_map::RandomState`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html
3788 [`std::hash::BuildHasherDefault`]: http://doc.rust-lang.org/nightly/std/hash/struct.BuildHasherDefault.html
3789 [`std::hash::BuildHasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html
3790 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
3791 [`u32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_rem
3792 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
3793 [`u32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_shl
3794 [`u32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_add
3795 [`u32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_div
3796 [`u32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_mul
3797 [`u32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_neg
3798 [`u32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_rem
3799 [`u32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shl
3800 [`u32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shr
3801 [`u32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_sub
3802 [`u32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.saturating_mul
3805 Version 1.6.0 (2016-01-21)
3806 ==========================
3811 * The `#![no_std]` attribute causes a crate to not be linked to the
3812 standard library, but only the [core library][1.6co], as described
3813 in [RFC 1184]. The core library defines common types and traits but
3814 has no platform dependencies whatsoever, and is the basis for Rust
3815 software in environments that cannot support a full port of the
3816 standard library, such as operating systems. Most of the core
3817 library is now stable.
3823 [`Read::read_exact`],
3824 [`ErrorKind::UnexpectedEof`][] (renamed from `UnexpectedEOF`),
3825 [`fs::DirBuilder`], [`fs::DirBuilder::new`],
3826 [`fs::DirBuilder::recursive`], [`fs::DirBuilder::create`],
3827 [`os::unix::fs::DirBuilderExt`],
3828 [`os::unix::fs::DirBuilderExt::mode`], [`vec::Drain`],
3829 [`vec::Vec::drain`], [`string::Drain`], [`string::String::drain`],
3830 [`vec_deque::Drain`], [`vec_deque::VecDeque::drain`],
3831 [`collections::hash_map::Drain`],
3832 [`collections::hash_map::HashMap::drain`],
3833 [`collections::hash_set::Drain`],
3834 [`collections::hash_set::HashSet::drain`],
3835 [`collections::binary_heap::Drain`],
3836 [`collections::binary_heap::BinaryHeap::drain`],
3837 [`Vec::extend_from_slice`][] (renamed from `push_all`),
3838 [`Mutex::get_mut`], [`Mutex::into_inner`], [`RwLock::get_mut`],
3839 [`RwLock::into_inner`],
3840 [`Iterator::min_by_key`][] (renamed from `min_by`),
3841 [`Iterator::max_by_key`][] (renamed from `max_by`).
3842 * The [core library][1.6co] is stable, as are most of its APIs.
3843 * [The `assert_eq!` macro supports arguments that don't implement
3844 `Sized`][1.6ae], such as arrays. In this way it behaves more like
3846 * Several timer functions that take duration in milliseconds [are
3847 deprecated in favor of those that take `Duration`][1.6ms]. These
3848 include `Condvar::wait_timeout_ms`, `thread::sleep_ms`, and
3849 `thread::park_timeout_ms`.
3850 * The algorithm by which `Vec` reserves additional elements was
3851 [tweaked to not allocate excessive space][1.6a] while still growing
3853 * `From` conversions are [implemented from integers to floats][1.6f]
3854 in cases where the conversion is lossless. Thus they are not
3855 implemented for 32-bit ints to `f32`, nor for 64-bit ints to `f32`
3856 or `f64`. They are also not implemented for `isize` and `usize`
3857 because the implementations would be platform-specific. `From` is
3858 also implemented from `f32` to `f64`.
3859 * `From<&Path>` and `From<PathBuf>` are implemented for `Cow<Path>`.
3860 * `From<T>` is implemented for `Box<T>`, `Rc<T>` and `Arc<T>`.
3861 * `IntoIterator` is implemented for `&PathBuf` and `&Path`.
3862 * [`BinaryHeap` was refactored][1.6bh] for modest performance
3864 * Sorting slices that are already sorted [is 50% faster in some
3870 * Cargo will look in `$CARGO_HOME/bin` for subcommands [by default][1.6c].
3871 * Cargo build scripts can specify their dependencies by emitting the
3872 [`rerun-if-changed`][1.6rr] key.
3873 * crates.io will reject publication of crates with dependencies that
3874 have a wildcard version constraint. Crates with wildcard
3875 dependencies were seen to cause a variety of problems, as described
3876 in [RFC 1241]. Since 1.5 publication of such crates has emitted a
3878 * `cargo clean` [accepts a `--release` flag][1.6cc] to clean the
3879 release folder. A variety of artifacts that Cargo failed to clean
3880 are now correctly deleted.
3885 * The `unreachable_code` lint [warns when a function call's argument
3887 * The parser indicates [failures that may be caused by
3888 confusingly-similar Unicode characters][1.6uc]
3889 * Certain macro errors [are reported at definition time][1.6m], not
3895 * The compiler no longer makes use of the [`RUST_PATH`][1.6rp]
3896 environment variable when locating crates. This was a pre-cargo
3897 feature for integrating with the package manager that was
3898 accidentally never removed.
3899 * [A number of bugs were fixed in the privacy checker][1.6p] that
3900 could cause previously-accepted code to break.
3901 * [Modules and unit/tuple structs may not share the same name][1.6ts].
3902 * [Bugs in pattern matching unit structs were fixed][1.6us]. The tuple
3903 struct pattern syntax (`Foo(..)`) can no longer be used to match
3904 unit structs. This is a warning now, but will become an error in
3905 future releases. Patterns that share the same name as a const are
3907 * A bug was fixed that causes [rustc not to apply default type
3908 parameters][1.6xc] when resolving certain method implementations of
3909 traits defined in other crates.
3911 [1.6a]: https://github.com/rust-lang/rust/pull/29454
3912 [1.6ae]: https://github.com/rust-lang/rust/pull/29770
3913 [1.6bh]: https://github.com/rust-lang/rust/pull/29811
3914 [1.6c]: https://github.com/rust-lang/cargo/pull/2192
3915 [1.6cc]: https://github.com/rust-lang/cargo/pull/2131
3916 [1.6co]: http://doc.rust-lang.org/beta/core/index.html
3917 [1.6dv]: https://github.com/rust-lang/rust/pull/30000
3918 [1.6f]: https://github.com/rust-lang/rust/pull/29129
3919 [1.6m]: https://github.com/rust-lang/rust/pull/29828
3920 [1.6ms]: https://github.com/rust-lang/rust/pull/29604
3921 [1.6p]: https://github.com/rust-lang/rust/pull/29726
3922 [1.6rp]: https://github.com/rust-lang/rust/pull/30034
3923 [1.6rr]: https://github.com/rust-lang/cargo/pull/2134
3924 [1.6s]: https://github.com/rust-lang/rust/pull/29675
3925 [1.6ts]: https://github.com/rust-lang/rust/issues/21546
3926 [1.6uc]: https://github.com/rust-lang/rust/pull/29837
3927 [1.6us]: https://github.com/rust-lang/rust/pull/29383
3928 [1.6xc]: https://github.com/rust-lang/rust/issues/30123
3929 [RFC 1184]: https://github.com/rust-lang/rfcs/blob/master/text/1184-stabilize-no_std.md
3930 [RFC 1241]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
3931 [`ErrorKind::UnexpectedEof`]: http://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html#variant.UnexpectedEof
3932 [`Iterator::max_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.max_by_key
3933 [`Iterator::min_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.min_by_key
3934 [`Mutex::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.get_mut
3935 [`Mutex::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.into_inner
3936 [`Read::read_exact`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_exact
3937 [`RwLock::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.get_mut
3938 [`RwLock::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.into_inner
3939 [`Vec::extend_from_slice`]: http://doc.rust-lang.org/nightly/collections/vec/struct.Vec.html#method.extend_from_slice
3940 [`collections::binary_heap::BinaryHeap::drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.BinaryHeap.html#method.drain
3941 [`collections::binary_heap::Drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.Drain.html
3942 [`collections::hash_map::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.Drain.html
3943 [`collections::hash_map::HashMap::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.HashMap.html#method.drain
3944 [`collections::hash_set::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.Drain.html
3945 [`collections::hash_set::HashSet::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.HashSet.html#method.drain
3946 [`fs::DirBuilder::create`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.create
3947 [`fs::DirBuilder::new`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.new
3948 [`fs::DirBuilder::recursive`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.recursive
3949 [`fs::DirBuilder`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html
3950 [`os::unix::fs::DirBuilderExt::mode`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html#tymethod.mode
3951 [`os::unix::fs::DirBuilderExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html
3952 [`string::Drain`]: http://doc.rust-lang.org/nightly/std/string/struct.Drain.html
3953 [`string::String::drain`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.drain
3954 [`vec::Drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Drain.html
3955 [`vec::Vec::drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.drain
3956 [`vec_deque::Drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.Drain.html
3957 [`vec_deque::VecDeque::drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.VecDeque.html#method.drain
3960 Version 1.5.0 (2015-12-10)
3961 ==========================
3963 * ~700 changes, numerous bugfixes
3969 [`BinaryHeap::from`], [`BinaryHeap::into_sorted_vec`],
3970 [`BinaryHeap::into_vec`], [`Condvar::wait_timeout`],
3971 [`FileTypeExt::is_block_device`], [`FileTypeExt::is_char_device`],
3972 [`FileTypeExt::is_fifo`], [`FileTypeExt::is_socket`],
3973 [`FileTypeExt`], [`Formatter::alternate`], [`Formatter::fill`],
3974 [`Formatter::precision`], [`Formatter::sign_aware_zero_pad`],
3975 [`Formatter::sign_minus`], [`Formatter::sign_plus`],
3976 [`Formatter::width`], [`Iterator::cmp`], [`Iterator::eq`],
3977 [`Iterator::ge`], [`Iterator::gt`], [`Iterator::le`],
3978 [`Iterator::lt`], [`Iterator::ne`], [`Iterator::partial_cmp`],
3979 [`Path::canonicalize`], [`Path::exists`], [`Path::is_dir`],
3980 [`Path::is_file`], [`Path::metadata`], [`Path::read_dir`],
3981 [`Path::read_link`], [`Path::symlink_metadata`],
3982 [`Utf8Error::valid_up_to`], [`Vec::resize`],
3983 [`VecDeque::as_mut_slices`], [`VecDeque::as_slices`],
3984 [`VecDeque::insert`], [`VecDeque::shrink_to_fit`],
3985 [`VecDeque::swap_remove_back`], [`VecDeque::swap_remove_front`],
3986 [`slice::split_first_mut`], [`slice::split_first`],
3987 [`slice::split_last_mut`], [`slice::split_last`],
3988 [`char::from_u32_unchecked`], [`fs::canonicalize`],
3989 [`str::MatchIndices`], [`str::RMatchIndices`],
3990 [`str::match_indices`], [`str::rmatch_indices`],
3991 [`str::slice_mut_unchecked`], [`string::ParseError`].
3992 * Rust applications hosted on crates.io can be installed locally to
3993 `~/.cargo/bin` with the [`cargo install`] command. Among other
3994 things this makes it easier to augment Cargo with new subcommands:
3995 when a binary named e.g. `cargo-foo` is found in `$PATH` it can be
3996 invoked as `cargo foo`.
3997 * Crates with wildcard (`*`) dependencies will [emit warnings when
3998 published][1.5w]. In 1.6 it will no longer be possible to publish
3999 crates with wildcard dependencies.
4004 * The rules determining when a particular lifetime must outlive
4005 a particular value (known as '[dropck]') have been [modified
4006 to not rely on parametricity][1.5p].
4007 * [Implementations of `AsRef` and `AsMut` were added to `Box`, `Rc`,
4008 and `Arc`][1.5a]. Because these smart pointer types implement
4009 `Deref`, this causes breakage in cases where the interior type
4010 contains methods of the same name.
4011 * [Correct a bug in Rc/Arc][1.5c] that caused [dropck] to be unaware
4012 that they could drop their content. Soundness fix.
4013 * All method invocations are [properly checked][1.5wf1] for
4014 [well-formedness][1.5wf2]. Soundness fix.
4015 * Traits whose supertraits contain `Self` are [not object
4016 safe][1.5o]. Soundness fix.
4017 * Target specifications support a [`no_default_libraries`][1.5nd]
4018 setting that controls whether `-nodefaultlibs` is passed to the
4019 linker, and in turn the `is_like_windows` setting no longer affects
4020 the `-nodefaultlibs` flag.
4021 * `#[derive(Show)]`, long-deprecated, [has been removed][1.5ds].
4022 * The `#[inline]` and `#[repr]` attributes [can only appear
4023 in valid locations][1.5at].
4024 * Native libraries linked from the local crate are [passed to
4025 the linker before native libraries from upstream crates][1.5nl].
4026 * Two rarely-used attributes, `#[no_debug]` and
4027 `#[omit_gdb_pretty_printer_section]` [are feature gated][1.5fg].
4028 * Negation of unsigned integers, which has been a warning for
4029 several releases, [is now behind a feature gate and will
4030 generate errors][1.5nu].
4031 * The parser accidentally accepted visibility modifiers on
4032 enum variants, a bug [which has been fixed][1.5ev].
4033 * [A bug was fixed that allowed `use` statements to import unstable
4039 * When evaluating expressions at compile-time that are not
4040 compile-time constants (const-evaluating expressions in non-const
4041 contexts), incorrect code such as overlong bitshifts and arithmetic
4042 overflow will [generate a warning instead of an error][1.5ce],
4043 delaying the error until runtime. This will allow the
4044 const-evaluator to be expanded in the future backwards-compatibly.
4045 * The `improper_ctypes` lint [no longer warns about using `isize` and
4046 `usize` in FFI][1.5ict].
4051 * `Arc<T>` and `Rc<T>` are [covariant with respect to `T` instead of
4053 * `Default` is [implemented for mutable slices][1.5d].
4054 * `FromStr` is [implemented for `SockAddrV4` and `SockAddrV6`][1.5s].
4055 * There are now `From` conversions [between floating point
4056 types][1.5f] where the conversions are lossless.
4057 * There are now `From` conversions [between integer types][1.5i] where
4058 the conversions are lossless.
4059 * [`fs::Metadata` implements `Clone`][1.5fs].
4060 * The `parse` method [accepts a leading "+" when parsing
4062 * [`AsMut` is implemented for `Vec`][1.5am].
4063 * The `clone_from` implementations for `String` and `BinaryHeap` [have
4064 been optimized][1.5cf] and no longer rely on the default impl.
4065 * The `extern "Rust"`, `extern "C"`, `unsafe extern "Rust"` and
4066 `unsafe extern "C"` function types now [implement `Clone`,
4067 `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and
4068 `fmt::Debug` for up to 12 arguments][1.5fp].
4069 * [Dropping `Vec`s is much faster in unoptimized builds when the
4070 element types don't implement `Drop`][1.5dv].
4071 * A bug that caused in incorrect behavior when [combining `VecDeque`
4072 with zero-sized types][1.5vdz] was resolved.
4073 * [`PartialOrd` for slices is faster][1.5po].
4078 * [Crate metadata size was reduced by 20%][1.5md].
4079 * [Improvements to code generation reduced the size of libcore by 3.3
4080 MB and rustc's memory usage by 18MB][1.5m].
4081 * [Improvements to deref translation increased performance in
4082 unoptimized builds][1.5dr].
4083 * Various errors in trait resolution [are deduplicated to only be
4084 reported once][1.5te].
4085 * Rust has preliminary [support for rumprun kernels][1.5rr].
4086 * Rust has preliminary [support for NetBSD on amd64][1.5na].
4088 [1.5use]: https://github.com/rust-lang/rust/pull/28364
4089 [1.5po]: https://github.com/rust-lang/rust/pull/28436
4090 [1.5ev]: https://github.com/rust-lang/rust/pull/28442
4091 [1.5nu]: https://github.com/rust-lang/rust/pull/28468
4092 [1.5dr]: https://github.com/rust-lang/rust/pull/28491
4093 [1.5vdz]: https://github.com/rust-lang/rust/pull/28494
4094 [1.5md]: https://github.com/rust-lang/rust/pull/28521
4095 [1.5fg]: https://github.com/rust-lang/rust/pull/28522
4096 [1.5dv]: https://github.com/rust-lang/rust/pull/28531
4097 [1.5na]: https://github.com/rust-lang/rust/pull/28543
4098 [1.5fp]: https://github.com/rust-lang/rust/pull/28560
4099 [1.5rr]: https://github.com/rust-lang/rust/pull/28593
4100 [1.5cf]: https://github.com/rust-lang/rust/pull/28602
4101 [1.5nl]: https://github.com/rust-lang/rust/pull/28605
4102 [1.5te]: https://github.com/rust-lang/rust/pull/28645
4103 [1.5at]: https://github.com/rust-lang/rust/pull/28650
4104 [1.5am]: https://github.com/rust-lang/rust/pull/28663
4105 [1.5m]: https://github.com/rust-lang/rust/pull/28778
4106 [1.5ict]: https://github.com/rust-lang/rust/pull/28779
4107 [1.5a]: https://github.com/rust-lang/rust/pull/28811
4108 [1.5pi]: https://github.com/rust-lang/rust/pull/28826
4109 [1.5ce]: https://github.com/rust-lang/rfcs/blob/master/text/1229-compile-time-asserts.md
4110 [1.5p]: https://github.com/rust-lang/rfcs/blob/master/text/1238-nonparametric-dropck.md
4111 [1.5i]: https://github.com/rust-lang/rust/pull/28921
4112 [1.5fs]: https://github.com/rust-lang/rust/pull/29021
4113 [1.5f]: https://github.com/rust-lang/rust/pull/29129
4114 [1.5ds]: https://github.com/rust-lang/rust/pull/29148
4115 [1.5s]: https://github.com/rust-lang/rust/pull/29190
4116 [1.5d]: https://github.com/rust-lang/rust/pull/29245
4117 [1.5o]: https://github.com/rust-lang/rust/pull/29259
4118 [1.5nd]: https://github.com/rust-lang/rust/pull/28578
4119 [1.5wf2]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
4120 [1.5wf1]: https://github.com/rust-lang/rust/pull/28669
4121 [dropck]: https://doc.rust-lang.org/nightly/nomicon/dropck.html
4122 [1.5c]: https://github.com/rust-lang/rust/pull/29110
4123 [1.5w]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
4124 [`cargo install`]: https://github.com/rust-lang/rfcs/blob/master/text/1200-cargo-install.md
4125 [`BinaryHeap::from`]: http://doc.rust-lang.org/nightly/std/convert/trait.From.html#method.from
4126 [`BinaryHeap::into_sorted_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_sorted_vec
4127 [`BinaryHeap::into_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_vec
4128 [`Condvar::wait_timeout`]: http://doc.rust-lang.org/nightly/std/sync/struct.Condvar.html#method.wait_timeout
4129 [`FileTypeExt::is_block_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_block_device
4130 [`FileTypeExt::is_char_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_char_device
4131 [`FileTypeExt::is_fifo`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_fifo
4132 [`FileTypeExt::is_socket`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_socket
4133 [`FileTypeExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html
4134 [`Formatter::alternate`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.alternate
4135 [`Formatter::fill`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.fill
4136 [`Formatter::precision`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.precision
4137 [`Formatter::sign_aware_zero_pad`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_aware_zero_pad
4138 [`Formatter::sign_minus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_minus
4139 [`Formatter::sign_plus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_plus
4140 [`Formatter::width`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.width
4141 [`Iterator::cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.cmp
4142 [`Iterator::eq`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.eq
4143 [`Iterator::ge`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ge
4144 [`Iterator::gt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.gt
4145 [`Iterator::le`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.le
4146 [`Iterator::lt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.lt
4147 [`Iterator::ne`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ne
4148 [`Iterator::partial_cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.partial_cmp
4149 [`Path::canonicalize`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.canonicalize
4150 [`Path::exists`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.exists
4151 [`Path::is_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_dir
4152 [`Path::is_file`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_file
4153 [`Path::metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.metadata
4154 [`Path::read_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_dir
4155 [`Path::read_link`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_link
4156 [`Path::symlink_metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.symlink_metadata
4157 [`Utf8Error::valid_up_to`]: http://doc.rust-lang.org/nightly/core/str/struct.Utf8Error.html#method.valid_up_to
4158 [`Vec::resize`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.resize
4159 [`VecDeque::as_mut_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_mut_slices
4160 [`VecDeque::as_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_slices
4161 [`VecDeque::insert`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.insert
4162 [`VecDeque::shrink_to_fit`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.shrink_to_fit
4163 [`VecDeque::swap_remove_back`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_back
4164 [`VecDeque::swap_remove_front`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_front
4165 [`slice::split_first_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first_mut
4166 [`slice::split_first`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first
4167 [`slice::split_last_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last_mut
4168 [`slice::split_last`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last
4169 [`char::from_u32_unchecked`]: http://doc.rust-lang.org/nightly/std/char/fn.from_u32_unchecked.html
4170 [`fs::canonicalize`]: http://doc.rust-lang.org/nightly/std/fs/fn.canonicalize.html
4171 [`str::MatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.MatchIndices.html
4172 [`str::RMatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.RMatchIndices.html
4173 [`str::match_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.match_indices
4174 [`str::rmatch_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatch_indices
4175 [`str::slice_mut_unchecked`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.slice_mut_unchecked
4176 [`string::ParseError`]: http://doc.rust-lang.org/nightly/std/string/enum.ParseError.html
4178 Version 1.4.0 (2015-10-29)
4179 ==========================
4181 * ~1200 changes, numerous bugfixes
4186 * Windows builds targeting the 64-bit MSVC ABI and linker (instead of
4187 GNU) are now supported and recommended for use.
4192 * [Several changes have been made to fix type soundness and improve
4193 the behavior of associated types][sound]. See [RFC 1214]. Although
4194 we have mostly introduced these changes as warnings this release, to
4195 become errors next release, there are still some scenarios that will
4196 see immediate breakage.
4197 * [The `str::lines` and `BufRead::lines` iterators treat `\r\n` as
4198 line breaks in addition to `\n`][crlf].
4199 * [Loans of `'static` lifetime extend to the end of a function][stat].
4200 * [`str::parse` no longer introduces avoidable rounding error when
4201 parsing floating point numbers. Together with earlier changes to
4202 float formatting/output, "round trips" like f.to_string().parse()
4203 now preserve the value of f exactly. Additionally, leading plus
4204 signs are now accepted][fp3].
4210 * `use` statements that import multiple items [can now rename
4211 them][i], as in `use foo::{bar as kitten, baz as puppy}`.
4212 * [Binops work correctly on fat pointers][binfat].
4213 * `pub extern crate`, which does not behave as expected, [issues a
4214 warning][pec] until a better solution is found.
4219 * [Many APIs were stabilized][stab]: `<Box<str>>::into_string`,
4220 [`Arc::downgrade`], [`Arc::get_mut`], [`Arc::make_mut`],
4221 [`Arc::try_unwrap`], [`Box::from_raw`], [`Box::into_raw`], [`CStr::to_str`],
4222 [`CStr::to_string_lossy`], [`CString::from_raw`], [`CString::into_raw`],
4223 [`IntoRawFd::into_raw_fd`], [`IntoRawFd`],
4224 `IntoRawHandle::into_raw_handle`, `IntoRawHandle`,
4225 `IntoRawSocket::into_raw_socket`, `IntoRawSocket`, [`Rc::downgrade`],
4226 [`Rc::get_mut`], [`Rc::make_mut`], [`Rc::try_unwrap`], [`Result::expect`],
4227 [`String::into_boxed_str`], [`TcpStream::read_timeout`],
4228 [`TcpStream::set_read_timeout`], [`TcpStream::set_write_timeout`],
4229 [`TcpStream::write_timeout`], [`UdpSocket::read_timeout`],
4230 [`UdpSocket::set_read_timeout`], [`UdpSocket::set_write_timeout`],
4231 [`UdpSocket::write_timeout`], `Vec::append`, `Vec::split_off`,
4232 [`VecDeque::append`], [`VecDeque::retain`], [`VecDeque::split_off`],
4233 [`rc::Weak::upgrade`], [`rc::Weak`], [`slice::Iter::as_slice`],
4234 [`slice::IterMut::into_slice`], [`str::CharIndices::as_str`],
4235 [`str::Chars::as_str`], [`str::split_at_mut`], [`str::split_at`],
4236 [`sync::Weak::upgrade`], [`sync::Weak`], [`thread::park_timeout`],
4238 * [Some APIs were deprecated][dep]: `BTreeMap::with_b`,
4239 `BTreeSet::with_b`, `Option::as_mut_slice`, `Option::as_slice`,
4240 `Result::as_mut_slice`, `Result::as_slice`, `f32::from_str_radix`,
4241 `f64::from_str_radix`.
4242 * [Reverse-searching strings is faster with the 'two-way'
4244 * [`std::io::copy` allows `?Sized` arguments][cc].
4245 * The `Windows`, `Chunks`, and `ChunksMut` iterators over slices all
4246 [override `count`, `nth` and `last` with an O(1)
4247 implementation][it].
4248 * [`Default` is implemented for arrays up to `[T; 32]`][d].
4249 * [`IntoRawFd` has been added to the Unix-specific prelude,
4250 `IntoRawSocket` and `IntoRawHandle` to the Windows-specific
4252 * [`Extend<String>` and `FromIterator<String` are both implemented for
4254 * [`IntoIterator` is implemented for references to `Option` and
4256 * [`HashMap` and `HashSet` implement `Extend<&T>` where `T:
4257 Copy`][ext] as part of [RFC 839]. This will cause type inference
4258 breakage in rare situations.
4259 * [`BinaryHeap` implements `Debug`][bh2].
4260 * [`Borrow` and `BorrowMut` are implemented for fixed-size
4262 * [`extern fn`s with the "Rust" and "C" ABIs implement common
4263 traits including `Eq`, `Ord`, `Debug`, `Hash`][fp].
4264 * [String comparison is faster][faststr].
4265 * `&mut T` where `T: std::fmt::Write` [also implements
4266 `std::fmt::Write`][mutw].
4267 * [A stable regression in `VecDeque::push_back` and other
4268 capacity-altering methods that caused panics for zero-sized types
4270 * [Function pointers implement traits for up to 12 parameters][fp2].
4275 * The compiler [no longer uses the 'morestack' feature to prevent
4276 stack overflow][mm]. Instead it uses guard pages and stack
4277 probes (though stack probes are not yet implemented on any platform
4279 * [The compiler matches traits faster when projections are involved][p].
4280 * The 'improper_ctypes' lint [no longer warns about use of `isize` and
4282 * [Cargo now displays useful information about what its doing during
4283 `cargo update`][cu].
4285 [`Arc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.downgrade
4286 [`Arc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.make_mut
4287 [`Arc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.get_mut
4288 [`Arc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.try_unwrap
4289 [`Box::from_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.from_raw
4290 [`Box::into_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.into_raw
4291 [`CStr::to_str`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_str
4292 [`CStr::to_string_lossy`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_string_lossy
4293 [`CString::from_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.from_raw
4294 [`CString::into_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_raw
4295 [`IntoRawFd::into_raw_fd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html#tymethod.into_raw_fd
4296 [`IntoRawFd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html
4297 [`Rc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.downgrade
4298 [`Rc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.get_mut
4299 [`Rc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.make_mut
4300 [`Rc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.try_unwrap
4301 [`Result::expect`]: http://doc.rust-lang.org/nightly/core/result/enum.Result.html#method.expect
4302 [`String::into_boxed_str`]: http://doc.rust-lang.org/nightly/collections/string/struct.String.html#method.into_boxed_str
4303 [`TcpStream::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
4304 [`TcpStream::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
4305 [`TcpStream::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
4306 [`TcpStream::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
4307 [`UdpSocket::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
4308 [`UdpSocket::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
4309 [`UdpSocket::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
4310 [`UdpSocket::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
4311 [`VecDeque::append`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.append
4312 [`VecDeque::retain`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.retain
4313 [`VecDeque::split_off`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.split_off
4314 [`rc::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html#method.upgrade
4315 [`rc::Weak`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html
4316 [`slice::Iter::as_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.Iter.html#method.as_slice
4317 [`slice::IterMut::into_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.IterMut.html#method.into_slice
4318 [`str::CharIndices::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.CharIndices.html#method.as_str
4319 [`str::Chars::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.Chars.html#method.as_str
4320 [`str::split_at_mut`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at_mut
4321 [`str::split_at`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at
4322 [`sync::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html#method.upgrade
4323 [`sync::Weak`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html
4324 [`thread::park_timeout`]: http://doc.rust-lang.org/nightly/std/thread/fn.park_timeout.html
4325 [`thread::sleep`]: http://doc.rust-lang.org/nightly/std/thread/fn.sleep.html
4326 [bh2]: https://github.com/rust-lang/rust/pull/28156
4327 [binfat]: https://github.com/rust-lang/rust/pull/28270
4328 [bm]: https://github.com/rust-lang/rust/pull/28197
4329 [cc]: https://github.com/rust-lang/rust/pull/27531
4330 [crlf]: https://github.com/rust-lang/rust/pull/28034
4331 [cu]: https://github.com/rust-lang/cargo/pull/1931
4332 [d]: https://github.com/rust-lang/rust/pull/27825
4333 [dep]: https://github.com/rust-lang/rust/pull/28339
4334 [es]: https://github.com/rust-lang/rust/pull/27956
4335 [ext]: https://github.com/rust-lang/rust/pull/28094
4336 [faststr]: https://github.com/rust-lang/rust/pull/28338
4337 [ffi]: https://github.com/rust-lang/rust/pull/28779
4338 [fp]: https://github.com/rust-lang/rust/pull/28268
4339 [fp2]: https://github.com/rust-lang/rust/pull/28560
4340 [fp3]: https://github.com/rust-lang/rust/pull/27307
4341 [i]: https://github.com/rust-lang/rust/pull/27451
4342 [into2]: https://github.com/rust-lang/rust/pull/28039
4343 [it]: https://github.com/rust-lang/rust/pull/27652
4344 [mm]: https://github.com/rust-lang/rust/pull/27338
4345 [mutw]: https://github.com/rust-lang/rust/pull/28368
4346 [sound]: https://github.com/rust-lang/rust/pull/27641
4347 [p]: https://github.com/rust-lang/rust/pull/27866
4348 [pec]: https://github.com/rust-lang/rust/pull/28486
4349 [pr]: https://github.com/rust-lang/rust/pull/27896
4350 [RFC 839]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
4351 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
4352 [s]: https://github.com/rust-lang/rust/pull/27474
4353 [stab]: https://github.com/rust-lang/rust/pull/28339
4354 [stat]: https://github.com/rust-lang/rust/pull/28321
4355 [vd]: https://github.com/rust-lang/rust/pull/28494
4357 Version 1.3.0 (2015-09-17)
4358 ==============================
4360 * ~900 changes, numerous bugfixes
4365 * The [new object lifetime defaults][nold] have been [turned
4366 on][nold2] after a cycle of warnings about the change. Now types
4367 like `&'a Box<Trait>` (or `&'a Rc<Trait>`, etc) will change from
4368 being interpreted as `&'a Box<Trait+'a>` to `&'a
4369 Box<Trait+'static>`.
4370 * [The Rustonomicon][nom] is a new book in the official documentation
4371 that dives into writing unsafe Rust.
4372 * The [`Duration`] API, [has been stabilized][ds]. This basic unit of
4373 timekeeping is employed by other std APIs, as well as out-of-tree
4379 * The [new object lifetime defaults][nold] have been [turned
4380 on][nold2] after a cycle of warnings about the change.
4381 * There is a known [regression][lr] in how object lifetime elision is
4382 interpreted, the proper solution for which is undetermined.
4383 * The `#[prelude_import]` attribute, an internal implementation
4384 detail, was accidentally stabilized previously. [It has been put
4385 behind the `prelude_import` feature gate][pi]. This change is
4386 believed to break no existing code.
4387 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
4388 [more sane for dynamically sized types][dst3]. Code that relied on
4389 the previous behavior is thought to be broken.
4390 * The `dropck` rules, which checks that destructors can't access
4391 destroyed values, [have been updated][dropck] to match the
4392 [RFC][dropckrfc]. This fixes some soundness holes, and as such will
4393 cause some previously-compiling code to no longer build.
4398 * The [new object lifetime defaults][nold] have been [turned
4399 on][nold2] after a cycle of warnings about the change.
4400 * Semicolons may [now follow types and paths in
4401 macros](https://github.com/rust-lang/rust/pull/27000).
4402 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
4403 [more sane for dynamically sized types][dst3]. Code that relied on
4404 the previous behavior is not known to exist, and suspected to be
4406 * `'static` variables [may now be recursive][st].
4407 * `ref` bindings choose between [`Deref`] and [`DerefMut`]
4408 implementations correctly.
4409 * The `dropck` rules, which checks that destructors can't access
4410 destroyed values, [have been updated][dropck] to match the
4416 * The [`Duration`] API, [has been stabilized][ds], as well as the
4417 `std::time` module, which presently contains only `Duration`.
4418 * `Box<str>` and `Box<[T]>` both implement `Clone`.
4419 * The owned C string, [`CString`], implements [`Borrow`] and the
4420 borrowed C string, [`CStr`], implements [`ToOwned`]. The two of
4421 these allow C strings to be borrowed and cloned in generic code.
4422 * [`CStr`] implements [`Debug`].
4423 * [`AtomicPtr`] implements [`Debug`].
4424 * [`Error`] trait objects [can be downcast to their concrete types][e]
4425 in many common configurations, using the [`is`], [`downcast`],
4426 [`downcast_ref`] and [`downcast_mut`] methods, similarly to the
4428 * Searching for substrings now [employs the two-way algorithm][search]
4429 instead of doing a naive search. This gives major speedups to a
4430 number of methods, including [`contains`][sc], [`find`][sf],
4431 [`rfind`][srf], [`split`][ss]. [`starts_with`][ssw] and
4432 [`ends_with`][sew] are also faster.
4433 * The performance of `PartialEq` for slices is [much faster][ps].
4434 * The [`Hash`] trait offers the default method, [`hash_slice`], which
4435 is overridden and optimized by the implementations for scalars.
4436 * The [`Hasher`] trait now has a number of specialized `write_*`
4437 methods for primitive types, for efficiency.
4438 * The I/O-specific error type, [`std::io::Error`][ie], gained a set of
4439 methods for accessing the 'inner error', if any: [`get_ref`][iegr],
4440 [`get_mut`][iegm], [`into_inner`][ieii]. As well, the implementation
4441 of [`std::error::Error::cause`][iec] also delegates to the inner
4443 * [`process::Child`][pc] gained the [`id`] method, which returns a
4444 `u32` representing the platform-specific process identifier.
4445 * The [`connect`] method on slices is deprecated, replaced by the new
4446 [`join`] method (note that both of these are on the *unstable*
4447 [`SliceConcatExt`] trait, but through the magic of the prelude are
4448 available to stable code anyway).
4449 * The [`Div`] operator is implemented for [`Wrapping`] types.
4450 * [`DerefMut` is implemented for `String`][dms].
4451 * Performance of SipHash (the default hasher for `HashMap`) is
4452 [better for long data][sh].
4453 * [`AtomicPtr`] implements [`Send`].
4454 * The [`read_to_end`] implementations for [`Stdin`] and [`File`]
4455 are now [specialized to use uninitialized buffers for increased
4457 * Lifetime parameters of foreign functions [are now resolved
4463 * Rust can now, with some coercion, [produce programs that run on
4464 Windows XP][xp], though XP is not considered a supported platform.
4465 * Porting Rust on Windows from the GNU toolchain to MSVC continues
4466 ([1][win1], [2][win2], [3][win3], [4][win4]). It is still not
4467 recommended for use in 1.3, though should be fully-functional
4468 in the [64-bit 1.4 beta][b14].
4469 * On Fedora-based systems installation will [properly configure the
4470 dynamic linker][fl].
4471 * The compiler gained many new extended error descriptions, which can
4472 be accessed with the `--explain` flag.
4473 * The `dropck` pass, which checks that destructors can't access
4474 destroyed values, [has been rewritten][dropck]. This fixes some
4475 soundness holes, and as such will cause some previously-compiling
4476 code to no longer build.
4477 * `rustc` now uses [LLVM to write archive files where possible][ar].
4478 Eventually this will eliminate the compiler's dependency on the ar
4480 * Rust has [preliminary support for i686 FreeBSD][fb] (it has long
4481 supported FreeBSD on x86_64).
4482 * The [`unused_mut`][lum], [`unconditional_recursion`][lur],
4483 [`improper_ctypes`][lic], and [`negate_unsigned`][lnu] lints are
4485 * If landing pads are disabled (with `-Z no-landing-pads`), [`panic!`
4486 will kill the process instead of leaking][nlp].
4488 [`Any`]: http://doc.rust-lang.org/nightly/std/any/trait.Any.html
4489 [`AtomicPtr`]: http://doc.rust-lang.org/nightly/std/sync/atomic/struct.AtomicPtr.html
4490 [`Borrow`]: http://doc.rust-lang.org/nightly/std/borrow/trait.Borrow.html
4491 [`CStr`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html
4492 [`CString`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html
4493 [`Debug`]: http://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
4494 [`DerefMut`]: http://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
4495 [`Deref`]: http://doc.rust-lang.org/nightly/std/ops/trait.Deref.html
4496 [`Div`]: http://doc.rust-lang.org/nightly/std/ops/trait.Div.html
4497 [`Duration`]: http://doc.rust-lang.org/nightly/std/time/struct.Duration.html
4498 [`Error`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html
4499 [`File`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html
4500 [`Hash`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html
4501 [`Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
4502 [`Send`]: http://doc.rust-lang.org/nightly/std/marker/trait.Send.html
4503 [`SliceConcatExt`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html
4504 [`Stdin`]: http://doc.rust-lang.org/nightly/std/io/struct.Stdin.html
4505 [`ToOwned`]: http://doc.rust-lang.org/nightly/std/borrow/trait.ToOwned.html
4506 [`Wrapping`]: http://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
4507 [`connect`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.connect
4508 [`downcast_mut`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_mut
4509 [`downcast_ref`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_ref
4510 [`downcast`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast
4511 [`hash_slice`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
4512 [`id`]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html#method.id
4513 [`is`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.is
4514 [`join`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.join
4515 [`read_to_end`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_to_end
4516 [ar]: https://github.com/rust-lang/rust/pull/26926
4517 [b14]: https://static.rust-lang.org/dist/rust-beta-x86_64-pc-windows-msvc.msi
4518 [dms]: https://github.com/rust-lang/rust/pull/26241
4519 [dropck]: https://github.com/rust-lang/rust/pull/27261
4520 [dropckrfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
4521 [ds]: https://github.com/rust-lang/rust/pull/26818
4522 [dst1]: http://doc.rust-lang.org/nightly/std/mem/fn.size_of_val.html
4523 [dst2]: http://doc.rust-lang.org/nightly/std/mem/fn.align_of_val.html
4524 [dst3]: https://github.com/rust-lang/rust/pull/27351
4525 [e]: https://github.com/rust-lang/rust/pull/24793
4526 [f]: https://github.com/rust-lang/rust/pull/26588
4527 [fb]: https://github.com/rust-lang/rust/pull/26959
4528 [fl]: https://github.com/rust-lang/rust-installer/pull/41
4529 [hs]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
4530 [ie]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html
4531 [iec]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.cause
4532 [iegm]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_mut
4533 [iegr]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_ref
4534 [ieii]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.into_inner
4535 [lic]: https://github.com/rust-lang/rust/pull/26583
4536 [lnu]: https://github.com/rust-lang/rust/pull/27026
4537 [lr]: https://github.com/rust-lang/rust/issues/27248
4538 [lum]: https://github.com/rust-lang/rust/pull/26378
4539 [lur]: https://github.com/rust-lang/rust/pull/26783
4540 [nlp]: https://github.com/rust-lang/rust/pull/27176
4541 [nold2]: https://github.com/rust-lang/rust/pull/27045
4542 [nold]: https://github.com/rust-lang/rfcs/blob/master/text/1156-adjust-default-object-bounds.md
4543 [nom]: http://doc.rust-lang.org/nightly/nomicon/
4544 [pc]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html
4545 [pi]: https://github.com/rust-lang/rust/pull/26699
4546 [ps]: https://github.com/rust-lang/rust/pull/26884
4547 [rte]: https://github.com/rust-lang/rust/pull/26950
4548 [sc]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.contains
4549 [search]: https://github.com/rust-lang/rust/pull/26327
4550 [sew]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.ends_with
4551 [sf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.find
4552 [sh]: https://github.com/rust-lang/rust/pull/27280
4553 [srf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rfind
4554 [ss]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split
4555 [ssw]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.starts_with
4556 [st]: https://github.com/rust-lang/rust/pull/26630
4557 [win1]: https://github.com/rust-lang/rust/pull/26569
4558 [win2]: https://github.com/rust-lang/rust/pull/26741
4559 [win3]: https://github.com/rust-lang/rust/pull/26741
4560 [win4]: https://github.com/rust-lang/rust/pull/27210
4561 [xp]: https://github.com/rust-lang/rust/pull/26569
4563 Version 1.2.0 (2015-08-07)
4564 ==========================
4566 * ~1200 changes, numerous bugfixes
4571 * [Dynamically-sized-type coercions][dst] allow smart pointer types
4572 like `Rc` to contain types without a fixed size, arrays and trait
4573 objects, finally enabling use of `Rc<[T]>` and completing the
4574 implementation of DST.
4575 * [Parallel codegen][parcodegen] is now working again, which can
4576 substantially speed up large builds in debug mode; It also gets
4577 another ~33% speedup when bootstrapping on a 4 core machine (using 8
4578 jobs). It's not enabled by default, but will be "in the near
4579 future". It can be activated with the `-C codegen-units=N` flag to
4581 * This is the first release with [experimental support for linking
4582 with the MSVC linker and lib C on Windows (instead of using the GNU
4583 variants via MinGW)][win]. It is yet recommended only for the most
4584 intrepid Rustaceans.
4585 * Benchmark compilations are showing a 30% improvement in
4586 bootstrapping over 1.1.
4591 * The [`to_uppercase`] and [`to_lowercase`] methods on `char` now do
4592 unicode case mapping, which is a previously-planned change in
4593 behavior and considered a bugfix.
4594 * [`mem::align_of`] now specifies [the *minimum alignment* for
4595 T][align], which is usually the alignment programs are interested
4596 in, and the same value reported by clang's
4597 `alignof`. [`mem::min_align_of`] is deprecated. This is not known to
4599 * [The `#[packed]` attribute is no longer silently accepted by the
4600 compiler][packed]. This attribute did nothing and code that
4601 mentioned it likely did not work as intended.
4602 * Associated type defaults are [now behind the
4603 `associated_type_defaults` feature gate][ad]. In 1.1 associated type
4604 defaults *did not work*, but could be mentioned syntactically. As
4605 such this breakage has minimal impact.
4610 * Patterns with `ref mut` now correctly invoke [`DerefMut`] when
4611 matching against dereferencable values.
4616 * The [`Extend`] trait, which grows a collection from an iterator, is
4617 implemented over iterators of references, for `String`, `Vec`,
4618 `LinkedList`, `VecDeque`, `EnumSet`, `BinaryHeap`, `VecMap`,
4619 `BTreeSet` and `BTreeMap`. [RFC][extend-rfc].
4620 * The [`iter::once`] function returns an iterator that yields a single
4621 element, and [`iter::empty`] returns an iterator that yields no
4623 * The [`matches`] and [`rmatches`] methods on `str` return iterators
4624 over substring matches.
4625 * [`Cell`] and [`RefCell`] both implement `Eq`.
4626 * A number of methods for wrapping arithmetic are added to the
4627 integral types, [`wrapping_div`], [`wrapping_rem`],
4628 [`wrapping_neg`], [`wrapping_shl`], [`wrapping_shr`]. These are in
4629 addition to the existing [`wrapping_add`], [`wrapping_sub`], and
4630 [`wrapping_mul`] methods, and alternatives to the [`Wrapping`]
4631 type.. It is illegal for the default arithmetic operations in Rust
4632 to overflow; the desire to wrap must be explicit.
4633 * The `{:#?}` formatting specifier [displays the alternate,
4634 pretty-printed][debugfmt] form of the `Debug` formatter. This
4635 feature was actually introduced prior to 1.0 with little
4637 * [`fmt::Formatter`] implements [`fmt::Write`], a `fmt`-specific trait
4638 for writing data to formatted strings, similar to [`io::Write`].
4639 * [`fmt::Formatter`] adds 'debug builder' methods, [`debug_struct`],
4640 [`debug_tuple`], [`debug_list`], [`debug_set`], [`debug_map`]. These
4641 are used by code generators to emit implementations of [`Debug`].
4642 * `str` has new [`to_uppercase`][strup] and [`to_lowercase`][strlow]
4643 methods that convert case, following Unicode case mapping.
4644 * It is now easier to handle poisoned locks. The [`PoisonError`]
4645 type, returned by failing lock operations, exposes `into_inner`,
4646 `get_ref`, and `get_mut`, which all give access to the inner lock
4647 guard, and allow the poisoned lock to continue to operate. The
4648 `is_poisoned` method of [`RwLock`] and [`Mutex`] can poll for a
4649 poisoned lock without attempting to take the lock.
4650 * On Unix the [`FromRawFd`] trait is implemented for [`Stdio`], and
4651 [`AsRawFd`] for [`ChildStdin`], [`ChildStdout`], [`ChildStderr`].
4652 On Windows the `FromRawHandle` trait is implemented for `Stdio`,
4653 and `AsRawHandle` for `ChildStdin`, `ChildStdout`,
4655 * [`io::ErrorKind`] has a new variant, `InvalidData`, which indicates
4661 * `rustc` employs smarter heuristics for guessing at [typos].
4662 * `rustc` emits more efficient code for [no-op conversions between
4663 unsafe pointers][nop].
4664 * Fat pointers are now [passed in pairs of immediate arguments][fat],
4665 resulting in faster compile times and smaller code.
4667 [`Extend`]: https://doc.rust-lang.org/nightly/std/iter/trait.Extend.html
4668 [extend-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
4669 [`iter::once`]: https://doc.rust-lang.org/nightly/std/iter/fn.once.html
4670 [`iter::empty`]: https://doc.rust-lang.org/nightly/std/iter/fn.empty.html
4671 [`matches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.matches
4672 [`rmatches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatches
4673 [`Cell`]: https://doc.rust-lang.org/nightly/std/cell/struct.Cell.html
4674 [`RefCell`]: https://doc.rust-lang.org/nightly/std/cell/struct.RefCell.html
4675 [`wrapping_add`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_add
4676 [`wrapping_sub`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_sub
4677 [`wrapping_mul`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_mul
4678 [`wrapping_div`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_div
4679 [`wrapping_rem`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_rem
4680 [`wrapping_neg`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_neg
4681 [`wrapping_shl`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shl
4682 [`wrapping_shr`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shr
4683 [`Wrapping`]: https://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
4684 [`fmt::Formatter`]: https://doc.rust-lang.org/nightly/std/fmt/struct.Formatter.html
4685 [`fmt::Write`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Write.html
4686 [`io::Write`]: https://doc.rust-lang.org/nightly/std/io/trait.Write.html
4687 [`debug_struct`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_struct
4688 [`debug_tuple`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_tuple
4689 [`debug_list`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_list
4690 [`debug_set`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_set
4691 [`debug_map`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_map
4692 [`Debug`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
4693 [strup]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_uppercase
4694 [strlow]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_lowercase
4695 [`to_uppercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_uppercase
4696 [`to_lowercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_lowercase
4697 [`PoisonError`]: https://doc.rust-lang.org/nightly/std/sync/struct.PoisonError.html
4698 [`RwLock`]: https://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html
4699 [`Mutex`]: https://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html
4700 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
4701 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
4702 [`Stdio`]: https://doc.rust-lang.org/nightly/std/process/struct.Stdio.html
4703 [`ChildStdin`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdin.html
4704 [`ChildStdout`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdout.html
4705 [`ChildStderr`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStderr.html
4706 [`io::ErrorKind`]: https://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html
4707 [debugfmt]: https://www.reddit.com/r/rust/comments/3ceaui/psa_produces_prettyprinted_debug_output/
4708 [`DerefMut`]: https://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
4709 [`mem::align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.align_of.html
4710 [align]: https://github.com/rust-lang/rust/pull/25646
4711 [`mem::min_align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.min_align_of.html
4712 [typos]: https://github.com/rust-lang/rust/pull/26087
4713 [nop]: https://github.com/rust-lang/rust/pull/26336
4714 [fat]: https://github.com/rust-lang/rust/pull/26411
4715 [dst]: https://github.com/rust-lang/rfcs/blob/master/text/0982-dst-coercion.md
4716 [parcodegen]: https://github.com/rust-lang/rust/pull/26018
4717 [packed]: https://github.com/rust-lang/rust/pull/25541
4718 [ad]: https://github.com/rust-lang/rust/pull/27382
4719 [win]: https://github.com/rust-lang/rust/pull/25350
4721 Version 1.1.0 (2015-06-25)
4722 =========================
4724 * ~850 changes, numerous bugfixes
4729 * The [`std::fs` module has been expanded][fs] to expand the set of
4730 functionality exposed:
4731 * `DirEntry` now supports optimizations like `file_type` and `metadata` which
4732 don't incur a syscall on some platforms.
4733 * A `symlink_metadata` function has been added.
4734 * The `fs::Metadata` structure now lowers to its OS counterpart, providing
4735 access to all underlying information.
4736 * The compiler now contains extended explanations of many errors. When an error
4737 with an explanation occurs the compiler suggests using the `--explain` flag
4738 to read the explanation. Error explanations are also [available online][err-index].
4739 * Thanks to multiple [improvements][sk] to [type checking][pre], as
4740 well as other work, the time to bootstrap the compiler decreased by
4746 * The [`str::split_whitespace`] method splits a string on unicode
4747 whitespace boundaries.
4748 * On both Windows and Unix, new extension traits provide conversion of
4749 I/O types to and from the underlying system handles. On Unix, these
4750 traits are [`FromRawFd`] and [`AsRawFd`], on Windows `FromRawHandle`
4751 and `AsRawHandle`. These are implemented for `File`, `TcpStream`,
4752 `TcpListener`, and `UpdSocket`. Further implementations for
4753 `std::process` will be stabilized later.
4754 * On Unix, [`std::os::unix::symlink`] creates symlinks. On
4755 Windows, symlinks can be created with
4756 `std::os::windows::symlink_dir` and
4757 `std::os::windows::symlink_file`.
4758 * The `mpsc::Receiver` type can now be converted into an iterator with
4759 `into_iter` on the [`IntoIterator`] trait.
4760 * `Ipv4Addr` can be created from `u32` with the `From<u32>`
4761 implementation of the [`From`] trait.
4762 * The `Debug` implementation for `RangeFull` [creates output that is
4763 more consistent with other implementations][rf].
4764 * [`Debug` is implemented for `File`][file].
4765 * The `Default` implementation for `Arc` [no longer requires `Sync +
4767 * [The `Iterator` methods `count`, `nth`, and `last` have been
4768 overridden for slices to have O(1) performance instead of O(n)][si].
4769 * Incorrect handling of paths on Windows has been improved in both the
4770 compiler and the standard library.
4771 * [`AtomicPtr` gained a `Default` implementation][ap].
4772 * In accordance with Rust's policy on arithmetic overflow `abs` now
4773 [panics on overflow when debug assertions are enabled][abs].
4774 * The [`Cloned`] iterator, which was accidentally left unstable for
4775 1.0 [has been stabilized][c].
4776 * The [`Incoming`] iterator, which iterates over incoming TCP
4777 connections, and which was accidentally unnamable in 1.0, [is now
4778 properly exported][inc].
4779 * [`BinaryHeap`] no longer corrupts itself [when functions called by
4780 `sift_up` or `sift_down` panic][bh].
4781 * The [`split_off`] method of `LinkedList` [no longer corrupts
4782 the list in certain scenarios][ll].
4787 * Type checking performance [has improved notably][sk] with
4788 [multiple improvements][pre].
4789 * The compiler [suggests code changes][ch] for more errors.
4790 * rustc and it's build system have experimental support for [building
4791 toolchains against MUSL][m] instead of glibc on Linux.
4792 * The compiler defines the `target_env` cfg value, which is used for
4793 distinguishing toolchains that are otherwise for the same
4794 platform. Presently this is set to `gnu` for common GNU Linux
4795 targets and for MinGW targets, and `musl` for MUSL Linux targets.
4796 * The [`cargo rustc`][crc] command invokes a build with custom flags
4798 * [Android executables are always position independent][pie].
4799 * [The `drop_with_repr_extern` lint warns about mixing `repr(C)`
4802 [`str::split_whitespace`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_whitespace
4803 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
4804 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
4805 [`std::os::unix::symlink`]: https://doc.rust-lang.org/nightly/std/os/unix/fs/fn.symlink.html
4806 [`IntoIterator`]: https://doc.rust-lang.org/nightly/std/iter/trait.IntoIterator.html
4807 [`From`]: https://doc.rust-lang.org/nightly/std/convert/trait.From.html
4808 [rf]: https://github.com/rust-lang/rust/pull/24491
4809 [err-index]: https://doc.rust-lang.org/error-index.html
4810 [sk]: https://github.com/rust-lang/rust/pull/24615
4811 [pre]: https://github.com/rust-lang/rust/pull/25323
4812 [file]: https://github.com/rust-lang/rust/pull/24598
4813 [ch]: https://github.com/rust-lang/rust/pull/24683
4814 [arc]: https://github.com/rust-lang/rust/pull/24695
4815 [si]: https://github.com/rust-lang/rust/pull/24701
4816 [ap]: https://github.com/rust-lang/rust/pull/24834
4817 [m]: https://github.com/rust-lang/rust/pull/24777
4818 [fs]: https://github.com/rust-lang/rfcs/blob/master/text/1044-io-fs-2.1.md
4819 [crc]: https://github.com/rust-lang/cargo/pull/1568
4820 [pie]: https://github.com/rust-lang/rust/pull/24953
4821 [abs]: https://github.com/rust-lang/rust/pull/25441
4822 [c]: https://github.com/rust-lang/rust/pull/25496
4823 [`Cloned`]: https://doc.rust-lang.org/nightly/std/iter/struct.Cloned.html
4824 [`Incoming`]: https://doc.rust-lang.org/nightly/std/net/struct.Incoming.html
4825 [inc]: https://github.com/rust-lang/rust/pull/25522
4826 [bh]: https://github.com/rust-lang/rust/pull/25856
4827 [`BinaryHeap`]: https://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html
4828 [ll]: https://github.com/rust-lang/rust/pull/26022
4829 [`split_off`]: https://doc.rust-lang.org/nightly/collections/linked_list/struct.LinkedList.html#method.split_off
4830 [drop]: https://github.com/rust-lang/rust/pull/24935
4832 Version 1.0.0 (2015-05-15)
4833 ========================
4835 * ~1500 changes, numerous bugfixes
4840 * The vast majority of the standard library is now `#[stable]`. It is
4841 no longer possible to use unstable features with a stable build of
4843 * Many popular crates on [crates.io] now work on the stable release
4845 * Arithmetic on basic integer types now [checks for overflow in debug
4851 * Several [restrictions have been added to trait coherence][coh] in
4852 order to make it easier for upstream authors to change traits
4853 without breaking downstream code.
4854 * Digits of binary and octal literals are [lexed more eagerly][lex] to
4855 improve error messages and macro behavior. For example, `0b1234` is
4856 now lexed as `0b1234` instead of two tokens, `0b1` and `234`.
4857 * Trait bounds [are always invariant][inv], eliminating the need for
4858 the `PhantomFn` and `MarkerTrait` lang items, which have been
4860 * ["-" is no longer a valid character in crate names][cr], the `extern crate
4861 "foo" as bar` syntax has been replaced with `extern crate foo as
4862 bar`, and Cargo now automatically translates "-" in *package* names
4863 to underscore for the crate name.
4864 * [Lifetime shadowing is an error][lt].
4865 * [`Send` no longer implies `'static`][send-rfc].
4866 * [UFCS now supports trait-less associated paths][moar-ufcs] like
4867 `MyType::default()`.
4868 * Primitive types [now have inherent methods][prim-inherent],
4869 obviating the need for extension traits like `SliceExt`.
4870 * Methods with `Self: Sized` in their `where` clause are [considered
4871 object-safe][self-sized], allowing many extension traits like
4872 `IteratorExt` to be merged into the traits they extended.
4873 * You can now [refer to associated types][assoc-where] whose
4874 corresponding trait bounds appear only in a `where` clause.
4875 * The final bits of [OIBIT landed][oibit-final], meaning that traits
4876 like `Send` and `Sync` are now library-defined.
4877 * A [Reflect trait][reflect] was introduced, which means that
4878 downcasting via the `Any` trait is effectively limited to concrete
4879 types. This helps retain the potentially-important "parametricity"
4880 property: generic code cannot behave differently for different type
4881 arguments except in minor ways.
4882 * The `unsafe_destructor` feature is now deprecated in favor of the
4883 [new `dropck`][dropck]. This change is a major reduction in unsafe
4889 * The `thread_local` module [has been renamed to `std::thread`][th].
4890 * The methods of `IteratorExt` [have been moved to the `Iterator`
4892 * Several traits that implement Rust's conventions for type
4893 conversions, `AsMut`, `AsRef`, `From`, and `Into` have been
4894 [centralized in the `std::convert` module][con].
4895 * The `FromError` trait [was removed in favor of `From`][fe].
4896 * The basic sleep function [has moved to
4897 `std::thread::sleep_ms`][slp].
4898 * The `splitn` function now takes an `n` parameter that represents the
4899 number of items yielded by the returned iterator [instead of the
4900 number of 'splits'][spl].
4901 * [On Unix, all file descriptors are `CLOEXEC` by default][clo].
4902 * [Derived implementations of `PartialOrd` now order enums according
4903 to their explicitly-assigned discriminants][po].
4904 * [Methods for searching strings are generic over `Pattern`s][pat],
4905 implemented presently by `&char`, `&str`, `FnMut(char) -> bool` and
4907 * [In method resolution, object methods are resolved before inherent
4909 * [`String::from_str` has been deprecated in favor of the `From` impl,
4910 `String::from`][sf].
4911 * [`io::Error` implements `Sync`][ios].
4912 * [The `words` method on `&str` has been replaced with
4913 `split_whitespace`][sw], to avoid answering the tricky question, 'what is
4915 * The new path and IO modules are complete and `#[stable]`. This
4916 was the major library focus for this cycle.
4917 * The path API was [revised][path-normalize] to normalize `.`,
4918 adjusting the tradeoffs in favor of the most common usage.
4919 * A large number of remaining APIs in `std` were also stabilized
4920 during this cycle; about 75% of the non-deprecated API surface
4922 * The new [string pattern API][string-pattern] landed, which makes
4923 the string slice API much more internally consistent and flexible.
4924 * A new set of [generic conversion traits][conversion] replaced
4925 many existing ad hoc traits.
4926 * Generic numeric traits were [completely removed][num-traits]. This
4927 was made possible thanks to inherent methods for primitive types,
4928 and the removal gives maximal flexibility for designing a numeric
4929 hierarchy in the future.
4930 * The `Fn` traits are now related via [inheritance][fn-inherit]
4931 and provide ergonomic [blanket implementations][fn-blanket].
4932 * The `Index` and `IndexMut` traits were changed to
4933 [take the index by value][index-value], enabling code like
4934 `hash_map["string"]` to work.
4935 * `Copy` now [inherits][copy-clone] from `Clone`, meaning that all
4936 `Copy` data is known to be `Clone` as well.
4941 * Many errors now have extended explanations that can be accessed with
4942 the `--explain` flag to `rustc`.
4943 * Many new examples have been added to the standard library
4945 * rustdoc has received a number of improvements focused on completion
4947 * Metadata was tuned, shrinking binaries [by 27%][metadata-shrink].
4948 * Much headway was made on ecosystem-wide CI, making it possible
4949 to [compare builds for breakage][ci-compare].
4952 [crates.io]: http://crates.io
4953 [clo]: https://github.com/rust-lang/rust/pull/24034
4954 [coh]: https://github.com/rust-lang/rfcs/blob/master/text/1023-rebalancing-coherence.md
4955 [con]: https://github.com/rust-lang/rust/pull/23875
4956 [cr]: https://github.com/rust-lang/rust/pull/23419
4957 [fe]: https://github.com/rust-lang/rust/pull/23879
4958 [ie]: https://github.com/rust-lang/rust/pull/23300
4959 [inv]: https://github.com/rust-lang/rust/pull/23938
4960 [ios]: https://github.com/rust-lang/rust/pull/24133
4961 [lex]: https://github.com/rust-lang/rfcs/blob/master/text/0879-small-base-lexing.md
4962 [lt]: https://github.com/rust-lang/rust/pull/24057
4963 [meth]: https://github.com/rust-lang/rust/pull/24056
4964 [pat]: https://github.com/rust-lang/rfcs/blob/master/text/0528-string-patterns.md
4965 [po]: https://github.com/rust-lang/rust/pull/24270
4966 [sf]: https://github.com/rust-lang/rust/pull/24517
4967 [slp]: https://github.com/rust-lang/rust/pull/23949
4968 [spl]: https://github.com/rust-lang/rfcs/blob/master/text/0979-align-splitn-with-other-languages.md
4969 [sw]: https://github.com/rust-lang/rfcs/blob/master/text/1054-str-words.md
4970 [th]: https://github.com/rust-lang/rfcs/blob/master/text/0909-move-thread-local-to-std-thread.md
4971 [send-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0458-send-improvements.md
4972 [moar-ufcs]: https://github.com/rust-lang/rust/pull/22172
4973 [prim-inherent]: https://github.com/rust-lang/rust/pull/23104
4974 [overflow]: https://github.com/rust-lang/rfcs/blob/master/text/0560-integer-overflow.md
4975 [metadata-shrink]: https://github.com/rust-lang/rust/pull/22971
4976 [self-sized]: https://github.com/rust-lang/rust/pull/22301
4977 [assoc-where]: https://github.com/rust-lang/rust/pull/22512
4978 [string-pattern]: https://github.com/rust-lang/rust/pull/22466
4979 [oibit-final]: https://github.com/rust-lang/rust/pull/21689
4980 [reflect]: https://github.com/rust-lang/rust/pull/23712
4981 [conversion]: https://github.com/rust-lang/rfcs/pull/529
4982 [num-traits]: https://github.com/rust-lang/rust/pull/23549
4983 [index-value]: https://github.com/rust-lang/rust/pull/23601
4984 [dropck]: https://github.com/rust-lang/rfcs/pull/769
4985 [ci-compare]: https://gist.github.com/brson/a30a77836fbec057cbee
4986 [fn-inherit]: https://github.com/rust-lang/rust/pull/23282
4987 [fn-blanket]: https://github.com/rust-lang/rust/pull/23895
4988 [copy-clone]: https://github.com/rust-lang/rust/pull/23860
4989 [path-normalize]: https://github.com/rust-lang/rust/pull/23229
4992 Version 1.0.0-alpha.2 (2015-02-20)
4993 =====================================
4995 * ~1300 changes, numerous bugfixes
4999 * The various I/O modules were [overhauled][io-rfc] to reduce
5000 unnecessary abstractions and provide better interoperation with
5001 the underlying platform. The old `io` module remains temporarily
5003 * The standard library now [participates in feature gating][feat],
5004 so use of unstable libraries now requires a `#![feature(...)]`
5005 attribute. The impact of this change is [described on the
5006 forum][feat-forum]. [RFC][feat-rfc].
5010 * `for` loops [now operate on the `IntoIterator` trait][into],
5011 which eliminates the need to call `.iter()`, etc. to iterate
5012 over collections. There are some new subtleties to remember
5013 though regarding what sort of iterators various types yield, in
5014 particular that `for foo in bar { }` yields values from a move
5015 iterator, destroying the original collection. [RFC][into-rfc].
5016 * Objects now have [default lifetime bounds][obj], so you don't
5017 have to write `Box<Trait+'static>` when you don't care about
5018 storing references. [RFC][obj-rfc].
5019 * In types that implement `Drop`, [lifetimes must outlive the
5020 value][drop]. This will soon make it possible to safely
5021 implement `Drop` for types where `#[unsafe_destructor]` is now
5022 required. Read the [gorgeous RFC][drop-rfc] for details.
5023 * The fully qualified <T as Trait>::X syntax lets you set the Self
5024 type for a trait method or associated type. [RFC][ufcs-rfc].
5025 * References to types that implement `Deref<U>` now [automatically
5026 coerce to references][deref] to the dereferenced type `U`,
5027 e.g. `&T where T: Deref<U>` automatically coerces to `&U`. This
5028 should eliminate many unsightly uses of `&*`, as when converting
5029 from references to vectors into references to
5030 slices. [RFC][deref-rfc].
5031 * The explicit [closure kind syntax][close] (`|&:|`, `|&mut:|`,
5032 `|:|`) is obsolete and closure kind is inferred from context.
5033 * [`Self` is a keyword][Self].
5037 * The `Show` and `String` formatting traits [have been
5038 renamed][fmt] to `Debug` and `Display` to more clearly reflect
5039 their related purposes. Automatically getting a string
5040 conversion to use with `format!("{:?}", something_to_debug)` is
5041 now written `#[derive(Debug)]`.
5042 * Abstract [OS-specific string types][osstr], `std::ff::{OsString,
5043 OsStr}`, provide strings in platform-specific encodings for easier
5044 interop with system APIs. [RFC][osstr-rfc].
5045 * The `boxed::into_raw` and `Box::from_raw` functions [convert
5046 between `Box<T>` and `*mut T`][boxraw], a common pattern for
5047 creating raw pointers.
5051 * Certain long error messages of the form 'expected foo found bar'
5052 are now [split neatly across multiple
5053 lines][multiline]. Examples in the PR.
5054 * On Unix Rust can be [uninstalled][un] by running
5055 `/usr/local/lib/rustlib/uninstall.sh`.
5056 * The `#[rustc_on_unimplemented]` attribute, requiring the
5057 'on_unimplemented' feature, lets rustc [display custom error
5058 messages when a trait is expected to be implemented for a type
5063 * Rust is tested against a [LALR grammar][lalr], which parses
5064 almost all the Rust files that rustc does.
5066 [boxraw]: https://github.com/rust-lang/rust/pull/21318
5067 [close]: https://github.com/rust-lang/rust/pull/21843
5068 [deref]: https://github.com/rust-lang/rust/pull/21351
5069 [deref-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0241-deref-conversions.md
5070 [drop]: https://github.com/rust-lang/rust/pull/21972
5071 [drop-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
5072 [feat]: https://github.com/rust-lang/rust/pull/21248
5073 [feat-forum]: https://users.rust-lang.org/t/psa-important-info-about-rustcs-new-feature-staging/82/5
5074 [feat-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0507-release-channels.md
5075 [fmt]: https://github.com/rust-lang/rust/pull/21457
5076 [into]: https://github.com/rust-lang/rust/pull/20790
5077 [into-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md#intoiterator-and-iterable
5078 [io-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
5079 [lalr]: https://github.com/rust-lang/rust/pull/21452
5080 [multiline]: https://github.com/rust-lang/rust/pull/19870
5081 [obj]: https://github.com/rust-lang/rust/pull/22230
5082 [obj-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0599-default-object-bound.md
5083 [onun]: https://github.com/rust-lang/rust/pull/20889
5084 [osstr]: https://github.com/rust-lang/rust/pull/21488
5085 [osstr-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
5086 [Self]: https://github.com/rust-lang/rust/pull/22158
5087 [ufcs-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0132-ufcs.md
5088 [un]: https://github.com/rust-lang/rust/pull/22256
5091 Version 1.0.0-alpha (2015-01-09)
5092 ==================================
5094 * ~2400 changes, numerous bugfixes
5098 * The language itself is considered feature complete for 1.0,
5099 though there will be many usability improvements and bugfixes
5100 before the final release.
5101 * Nearly 50% of the public API surface of the standard library has
5102 been declared 'stable'. Those interfaces are unlikely to change
5104 * The long-running debate over integer types has been
5105 [settled][ints]: Rust will ship with types named `isize` and
5106 `usize`, rather than `int` and `uint`, for pointer-sized
5107 integers. Guidelines will be rolled out during the alpha cycle.
5108 * Most crates that are not `std` have been moved out of the Rust
5109 distribution into the Cargo ecosystem so they can evolve
5110 separately and don't need to be stabilized as quickly, including
5111 'time', 'getopts', 'num', 'regex', and 'term'.
5112 * Documentation continues to be expanded with more API coverage, more
5113 examples, and more in-depth explanations. The guides have been
5114 consolidated into [The Rust Programming Language][trpl].
5115 * "[Rust By Example][rbe]" is now maintained by the Rust team.
5116 * All official Rust binary installers now come with [Cargo], the
5117 Rust package manager.
5121 * Closures have been [completely redesigned][unboxed] to be
5122 implemented in terms of traits, can now be used as generic type
5123 bounds and thus monomorphized and inlined, or via an opaque
5124 pointer (boxed) as in the old system. The new system is often
5125 referred to as 'unboxed' closures.
5126 * Traits now support [associated types][assoc], allowing families
5127 of related types to be defined together and used generically in
5129 * Enum variants are [namespaced by their type names][enum].
5130 * [`where` clauses][where] provide a more versatile and attractive
5131 syntax for specifying generic bounds, though the previous syntax
5133 * Rust again picks a [fallback][fb] (either i32 or f64) for uninferred
5135 * Rust [no longer has a runtime][rt] of any description, and only
5136 supports OS threads, not green threads.
5137 * At long last, Rust has been overhauled for 'dynamically-sized
5138 types' ([DST]), which integrates 'fat pointers' (object types,
5139 arrays, and `str`) more deeply into the type system, making it
5141 * Rust now has a general [range syntax][range], `i..j`, `i..`, and
5142 `..j` that produce range types and which, when combined with the
5143 `Index` operator and multidispatch, leads to a convenient slice
5145 * The new range syntax revealed an ambiguity in the fixed-length
5146 array syntax, so now fixed length arrays [are written `[T;
5148 * The `Copy` trait is no longer implemented automatically. Unsafe
5149 pointers no longer implement `Sync` and `Send` so types
5150 containing them don't automatically either. `Sync` and `Send`
5151 are now 'unsafe traits' so one can "forcibly" implement them via
5152 `unsafe impl` if a type confirms to the requirements for them
5153 even though the internals do not (e.g. structs containing unsafe
5154 pointers like `Arc`). These changes are intended to prevent some
5155 footguns and are collectively known as [opt-in built-in
5156 traits][oibit] (though `Sync` and `Send` will soon become pure
5157 library types unknown to the compiler).
5158 * Operator traits now take their operands [by value][ops], and
5159 comparison traits can use multidispatch to compare one type
5160 against multiple other types, allowing e.g. `String` to be
5161 compared with `&str`.
5162 * `if let` and `while let` are no longer feature-gated.
5163 * Rust has adopted a more [uniform syntax for escaping unicode
5164 characters][unicode].
5165 * `macro_rules!` [has been declared stable][mac]. Though it is a
5166 flawed system it is sufficiently popular that it must be usable
5167 for 1.0. Effort has gone into [future-proofing][mac-future] it
5168 in ways that will allow other macro systems to be developed in
5169 parallel, and won't otherwise impact the evolution of the
5171 * The prelude has been [pared back significantly][prelude] such
5172 that it is the minimum necessary to support the most pervasive
5173 code patterns, and through [generalized where clauses][where]
5174 many of the prelude extension traits have been consolidated.
5175 * Rust's rudimentary reflection [has been removed][refl], as it
5176 incurred too much code generation for little benefit.
5177 * [Struct variants][structvars] are no longer feature-gated.
5178 * Trait bounds can be [polymorphic over lifetimes][hrtb]. Also
5179 known as 'higher-ranked trait bounds', this crucially allows
5180 unboxed closures to work.
5181 * Macros invocations surrounded by parens or square brackets and
5182 not terminated by a semicolon are [parsed as
5183 expressions][macros], which makes expressions like `vec![1i32,
5184 2, 3].len()` work as expected.
5185 * Trait objects now implement their traits automatically, and
5186 traits that can be coerced to objects now must be [object
5188 * Automatically deriving traits is now done with `#[derive(...)]`
5189 not `#[deriving(...)]` for [consistency with other naming
5190 conventions][derive].
5191 * Importing the containing module or enum at the same time as
5192 items or variants they contain is [now done with `self` instead
5193 of `mod`][self], as in use `foo::{self, bar}`
5194 * Glob imports are no longer feature-gated.
5195 * The `box` operator and `box` patterns have been feature-gated
5196 pending a redesign. For now unique boxes should be allocated
5197 like other containers, with `Box::new`.
5201 * A [series][coll1] of [efforts][coll2] to establish
5202 [conventions][coll3] for collections types has resulted in API
5203 improvements throughout the standard library.
5204 * New [APIs for error handling][err] provide ergonomic interop
5205 between error types, and [new conventions][err-conv] describe
5206 more clearly the recommended error handling strategies in Rust.
5207 * The `fail!` macro has been renamed to [`panic!`][panic] so that
5208 it is easier to discuss failure in the context of error handling
5209 without making clarifications as to whether you are referring to
5210 the 'fail' macro or failure more generally.
5211 * On Linux, `OsRng` prefers the new, more reliable `getrandom`
5212 syscall when available.
5213 * The 'serialize' crate has been renamed 'rustc-serialize' and
5214 moved out of the distribution to Cargo. Although it is widely
5215 used now, it is expected to be superseded in the near future.
5216 * The `Show` formatter, typically implemented with
5217 `#[derive(Show)]` is [now requested with the `{:?}`
5218 specifier][show] and is intended for use by all types, for uses
5219 such as `println!` debugging. The new `String` formatter must be
5220 implemented by hand, uses the `{}` specifier, and is intended
5221 for full-fidelity conversions of things that can logically be
5222 represented as strings.
5226 * [Flexible target specification][flex] allows rustc's code
5227 generation to be configured to support otherwise-unsupported
5229 * Rust comes with rust-gdb and rust-lldb scripts that launch their
5230 respective debuggers with Rust-appropriate pretty-printing.
5231 * The Windows installation of Rust is distributed with the
5232 MinGW components currently required to link binaries on that
5237 * Nullable enum optimizations have been extended to more types so
5238 that e.g. `Option<Vec<T>>` and `Option<String>` take up no more
5239 space than the inner types themselves.
5240 * Work has begun on supporting AArch64.
5242 [Cargo]: https://crates.io
5243 [unboxed]: http://smallcultfollowing.com/babysteps/blog/2014/11/26/purging-proc/
5244 [enum]: https://github.com/rust-lang/rfcs/blob/master/text/0390-enum-namespacing.md
5245 [flex]: https://github.com/rust-lang/rfcs/blob/master/text/0131-target-specification.md
5246 [err]: https://github.com/rust-lang/rfcs/blob/master/text/0201-error-chaining.md
5247 [err-conv]: https://github.com/rust-lang/rfcs/blob/master/text/0236-error-conventions.md
5248 [rt]: https://github.com/rust-lang/rfcs/blob/master/text/0230-remove-runtime.md
5249 [mac]: https://github.com/rust-lang/rfcs/blob/master/text/0453-macro-reform.md
5250 [mac-future]: https://github.com/rust-lang/rfcs/pull/550
5251 [DST]: http://smallcultfollowing.com/babysteps/blog/2014/01/05/dst-take-5/
5252 [coll1]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md
5253 [coll2]: https://github.com/rust-lang/rfcs/blob/master/text/0509-collections-reform-part-2.md
5254 [coll3]: https://github.com/rust-lang/rfcs/blob/master/text/0216-collection-views.md
5255 [ops]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md
5256 [prelude]: https://github.com/rust-lang/rfcs/blob/master/text/0503-prelude-stabilization.md
5257 [where]: https://github.com/rust-lang/rfcs/blob/master/text/0135-where.md
5258 [refl]: https://github.com/rust-lang/rfcs/blob/master/text/0379-remove-reflection.md
5259 [panic]: https://github.com/rust-lang/rfcs/blob/master/text/0221-panic.md
5260 [structvars]: https://github.com/rust-lang/rfcs/blob/master/text/0418-struct-variants.md
5261 [hrtb]: https://github.com/rust-lang/rfcs/blob/master/text/0387-higher-ranked-trait-bounds.md
5262 [unicode]: https://github.com/rust-lang/rfcs/blob/master/text/0446-es6-unicode-escapes.md
5263 [oibit]: https://github.com/rust-lang/rfcs/blob/master/text/0019-opt-in-builtin-traits.md
5264 [macros]: https://github.com/rust-lang/rfcs/blob/master/text/0378-expr-macros.md
5265 [range]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md#indexing-and-slicing
5266 [arrays]: https://github.com/rust-lang/rfcs/blob/master/text/0520-new-array-repeat-syntax.md
5267 [show]: https://github.com/rust-lang/rfcs/blob/master/text/0504-show-stabilization.md
5268 [derive]: https://github.com/rust-lang/rfcs/blob/master/text/0534-deriving2derive.md
5269 [self]: https://github.com/rust-lang/rfcs/blob/master/text/0532-self-in-use.md
5270 [fb]: https://github.com/rust-lang/rfcs/blob/master/text/0212-restore-int-fallback.md
5271 [objsafe]: https://github.com/rust-lang/rfcs/blob/master/text/0255-object-safety.md
5272 [assoc]: https://github.com/rust-lang/rfcs/blob/master/text/0195-associated-items.md
5273 [ints]: https://github.com/rust-lang/rfcs/pull/544#issuecomment-68760871
5274 [trpl]: https://doc.rust-lang.org/book/index.html
5275 [rbe]: http://rustbyexample.com/
5278 Version 0.12.0 (2014-10-09)
5279 =============================
5281 * ~1900 changes, numerous bugfixes
5285 * The introductory documentation (now called The Rust Guide) has
5286 been completely rewritten, as have a number of supplementary
5288 * Rust's package manager, Cargo, continues to improve and is
5289 sometimes considered to be quite awesome.
5290 * Many API's in `std` have been reviewed and updated for
5291 consistency with the in-development Rust coding
5292 guidelines. The standard library documentation tracks
5293 stabilization progress.
5294 * Minor libraries have been moved out-of-tree to the rust-lang org
5295 on GitHub: uuid, semver, glob, num, hexfloat, fourcc. They can
5296 be installed with Cargo.
5297 * Lifetime elision allows lifetime annotations to be left off of
5298 function declarations in many common scenarios.
5299 * Rust now works on 64-bit Windows.
5302 * Indexing can be overloaded with the `Index` and `IndexMut`
5304 * The `if let` construct takes a branch only if the `let` pattern
5305 matches, currently behind the 'if_let' feature gate.
5306 * 'where clauses', a more flexible syntax for specifying trait
5307 bounds that is more aesthetic, have been added for traits and
5308 free functions. Where clauses will in the future make it
5309 possible to constrain associated types, which would be
5310 impossible with the existing syntax.
5311 * A new slicing syntax (e.g. `[0..4]`) has been introduced behind
5312 the 'slicing_syntax' feature gate, and can be overloaded with
5313 the `Slice` or `SliceMut` traits.
5314 * The syntax for matching of sub-slices has been changed to use a
5315 postfix `..` instead of prefix (.e.g. `[a, b, c..]`), for
5316 consistency with other uses of `..` and to future-proof
5317 potential additional uses of the syntax.
5318 * The syntax for matching inclusive ranges in patterns has changed
5319 from `0..3` to `0...4` to be consistent with the exclusive range
5321 * Matching of sub-slices in non-tail positions (e.g. `[a.., b,
5322 c]`) has been put behind the 'advanced_slice_patterns' feature
5323 gate and may be removed in the future.
5324 * Components of tuples and tuple structs can be extracted using
5325 the `value.0` syntax, currently behind the `tuple_indexing`
5327 * The `#[crate_id]` attribute is no longer supported; versioning
5328 is handled by the package manager.
5329 * Renaming crate imports are now written `extern crate foo as bar`
5330 instead of `extern crate bar = foo`.
5331 * Renaming use statements are now written `use foo as bar` instead
5333 * `let` and `match` bindings and argument names in macros are now
5335 * The new, more efficient, closure types ('unboxed closures') have
5336 been added under a feature gate, 'unboxed_closures'. These will
5337 soon replace the existing closure types, once higher-ranked
5338 trait lifetimes are added to the language.
5339 * `move` has been added as a keyword, for indicating closures
5340 that capture by value.
5341 * Mutation and assignment is no longer allowed in pattern guards.
5342 * Generic structs and enums can now have trait bounds.
5343 * The `Share` trait is now called `Sync` to free up the term
5344 'shared' to refer to 'shared reference' (the default reference
5346 * Dynamically-sized types have been mostly implemented,
5347 unifying the behavior of fat-pointer types with the rest of the
5349 * As part of dynamically-sized types, the `Sized` trait has been
5350 introduced, which qualifying types implement by default, and
5351 which type parameters expect by default. To specify that a type
5352 parameter does not need to be sized, write `<Sized? T>`. Most
5353 types are `Sized`, notable exceptions being unsized arrays
5354 (`[T]`) and trait types.
5355 * Closures can return `!`, as in `|| -> !` or `proc() -> !`.
5356 * Lifetime bounds can now be applied to type parameters and object
5358 * The old, reference counted GC type, `Gc<T>` which was once
5359 denoted by the `@` sigil, has finally been removed. GC will be
5360 revisited in the future.
5363 * Library documentation has been improved for a number of modules.
5364 * Bit-vectors, collections::bitv has been modernized.
5365 * The url crate is deprecated in favor of
5366 http://github.com/servo/rust-url, which can be installed with
5368 * Most I/O stream types can be cloned and subsequently closed from
5370 * A `std::time::Duration` type has been added for use in I/O
5371 methods that rely on timers, as well as in the 'time' crate's
5372 `Timespec` arithmetic.
5373 * The runtime I/O abstraction layer that enabled the green thread
5374 scheduler to do non-thread-blocking I/O has been removed, along
5375 with the libuv-based implementation employed by the green thread
5376 scheduler. This will greatly simplify the future I/O work.
5377 * `collections::btree` has been rewritten to have a more
5378 idiomatic and efficient design.
5381 * rustdoc output now indicates the stability levels of API's.
5382 * The `--crate-name` flag can specify the name of the crate
5383 being compiled, like `#[crate_name]`.
5384 * The `-C metadata` specifies additional metadata to hash into
5385 symbol names, and `-C extra-filename` specifies additional
5386 information to put into the output filename, for use by the
5387 package manager for versioning.
5388 * debug info generation has continued to improve and should be
5389 more reliable under both gdb and lldb.
5390 * rustc has experimental support for compiling in parallel
5391 using the `-C codegen-units` flag.
5392 * rustc no longer encodes rpath information into binaries by
5396 * Stack usage has been optimized with LLVM lifetime annotations.
5397 * Official Rust binaries on Linux are more compatible with older
5398 kernels and distributions, built on CentOS 5.10.
5401 Version 0.11.0 (2014-07-02)
5402 ==========================
5404 * ~1700 changes, numerous bugfixes
5407 * ~[T] has been removed from the language. This type is superseded by
5409 * ~str has been removed from the language. This type is superseded by
5411 * ~T has been removed from the language. This type is superseded by the
5413 * @T has been removed from the language. This type is superseded by the
5414 standard library's std::gc::Gc<T> type.
5415 * Struct fields are now all private by default.
5416 * Vector indices and shift amounts are both required to be a `uint`
5417 instead of any integral type.
5418 * Byte character, byte string, and raw byte string literals are now all
5419 supported by prefixing the normal literal with a `b`.
5420 * Multiple ABIs are no longer allowed in an ABI string
5421 * The syntax for lifetimes on closures/procedures has been tweaked
5422 slightly: `<'a>|A, B|: 'b + K -> T`
5423 * Floating point modulus has been removed from the language; however it
5424 is still provided by a library implementation.
5425 * Private enum variants are now disallowed.
5426 * The `priv` keyword has been removed from the language.
5427 * A closure can no longer be invoked through a &-pointer.
5428 * The `use foo, bar, baz;` syntax has been removed from the language.
5429 * The transmute intrinsic no longer works on type parameters.
5430 * Statics now allow blocks/items in their definition.
5431 * Trait bounds are separated from objects with + instead of : now.
5432 * Objects can no longer be read while they are mutably borrowed.
5433 * The address of a static is now marked as insignificant unless the
5434 #[inline(never)] attribute is placed it.
5435 * The #[unsafe_destructor] attribute is now behind a feature gate.
5436 * Struct literals are no longer allowed in ambiguous positions such as
5437 if, while, match, and for..in.
5438 * Declaration of lang items and intrinsics are now feature-gated by
5440 * Integral literals no longer default to `int`, and floating point
5441 literals no longer default to `f64`. Literals must be suffixed with an
5442 appropriate type if inference cannot determine the type of the
5444 * The Box<T> type is no longer implicitly borrowed to &mut T.
5445 * Procedures are now required to not capture borrowed references.
5448 * The standard library is now a "facade" over a number of underlying
5449 libraries. This means that development on the standard library should
5450 be speedier due to smaller crates, as well as a clearer line between
5452 * A new library, libcore, lives under the standard library's facade
5453 which is Rust's "0-assumption" library, suitable for embedded and
5454 kernel development for example.
5455 * A regex crate has been added to the standard distribution. This crate
5456 includes statically compiled regular expressions.
5457 * The unwrap/unwrap_err methods on Result require a Show bound for
5458 better error messages.
5459 * The return types of the std::comm primitives have been centralized
5460 around the Result type.
5461 * A number of I/O primitives have gained the ability to time out their
5463 * A number of I/O primitives have gained the ability to close their
5464 reading/writing halves to cancel pending operations.
5465 * Reverse iterator methods have been removed in favor of `rev()` on
5466 their forward-iteration counterparts.
5467 * A bitflags! macro has been added to enable easy interop with C and
5468 management of bit flags.
5469 * A debug_assert! macro is now provided which is disabled when
5470 `--cfg ndebug` is passed to the compiler.
5471 * A graphviz crate has been added for creating .dot files.
5472 * The std::cast module has been migrated into std::mem.
5473 * The std::local_data api has been migrated from freestanding functions
5474 to being based on methods.
5475 * The Pod trait has been renamed to Copy.
5476 * jemalloc has been added as the default allocator for types.
5477 * The API for allocating memory has been changed to use proper alignment
5478 and sized deallocation
5479 * Connecting a TcpStream or binding a TcpListener is now based on a
5480 string address and a u16 port. This allows connecting to a hostname as
5482 * The Reader trait now contains a core method, read_at_least(), which
5483 correctly handles many repeated 0-length reads.
5484 * The process-spawning API is now centered around a builder-style
5486 * The :? printing qualifier has been moved from the standard library to
5487 an external libdebug crate.
5488 * Eq/Ord have been renamed to PartialEq/PartialOrd. TotalEq/TotalOrd
5489 have been renamed to Eq/Ord.
5490 * The select/plural methods have been removed from format!. The escapes
5491 for { and } have also changed from \{ and \} to {{ and }},
5493 * The TaskBuilder API has been re-worked to be a true builder, and
5494 extension traits for spawning native/green tasks have been added.
5497 * All breaking changes to the language or libraries now have their
5498 commit message annotated with `[breaking-change]` to allow for easy
5499 discovery of breaking changes.
5500 * The compiler will now try to suggest how to annotate lifetimes if a
5501 lifetime-related error occurs.
5502 * Debug info continues to be improved greatly with general bug fixes and
5503 better support for situations like link time optimization (LTO).
5504 * Usage of syntax extensions when cross-compiling has been fixed.
5505 * Functionality equivalent to GCC & Clang's -ffunction-sections,
5506 -fdata-sections and --gc-sections has been enabled by default
5507 * The compiler is now stricter about where it will load module files
5508 from when a module is declared via `mod foo;`.
5509 * The #[phase(syntax)] attribute has been renamed to #[phase(plugin)].
5510 Syntax extensions are now discovered via a "plugin registrar" type
5511 which will be extended in the future to other various plugins.
5512 * Lints have been restructured to allow for dynamically loadable lints.
5513 * A number of rustdoc improvements:
5514 * The HTML output has been visually redesigned.
5515 * Markdown is now powered by hoedown instead of sundown.
5516 * Searching heuristics have been greatly improved.
5517 * The search index has been reduced in size by a great amount.
5518 * Cross-crate documentation via `pub use` has been greatly improved.
5519 * Primitive types are now hyperlinked and documented.
5520 * Documentation has been moved from static.rust-lang.org/doc to
5522 * A new sandbox, play.rust-lang.org, is available for running and
5523 sharing rust code examples on-line.
5524 * Unused attributes are now more robustly warned about.
5525 * The dead_code lint now warns about unused struct fields.
5526 * Cross-compiling to iOS is now supported.
5527 * Cross-compiling to mipsel is now supported.
5528 * Stability attributes are now inherited by default and no longer apply
5529 to intra-crate usage, only inter-crate usage.
5530 * Error message related to non-exhaustive match expressions have been
5534 Version 0.10 (2014-04-03)
5535 =========================
5537 * ~1500 changes, numerous bugfixes
5540 * A new RFC process is now in place for modifying the language.
5541 * Patterns with `@`-pointers have been removed from the language.
5542 * Patterns with unique vectors (`~[T]`) have been removed from the
5544 * Patterns with unique strings (`~str`) have been removed from the
5546 * `@str` has been removed from the language.
5547 * `@[T]` has been removed from the language.
5548 * `@self` has been removed from the language.
5549 * `@Trait` has been removed from the language.
5550 * Headers on `~` allocations which contain `@` boxes inside the type for
5551 reference counting have been removed.
5552 * The semantics around the lifetimes of temporary expressions have changed,
5553 see #3511 and #11585 for more information.
5554 * Cross-crate syntax extensions are now possible, but feature gated. See
5555 #11151 for more information. This includes both `macro_rules!` macros as
5556 well as syntax extensions such as `format!`.
5557 * New lint modes have been added, and older ones have been turned on to be
5559 * Unnecessary parentheses
5562 * Uppercase variables
5563 * Publicly visible private types
5564 * `#[deriving]` with raw pointers
5565 * Unsafe functions can no longer be coerced to closures.
5566 * Various obscure macros such as `log_syntax!` are now behind feature gates.
5567 * The `#[simd]` attribute is now behind a feature gate.
5568 * Visibility is no longer allowed on `extern crate` statements, and
5569 unnecessary visibility (`priv`) is no longer allowed on `use` statements.
5570 * Trailing commas are now allowed in argument lists and tuple patterns.
5571 * The `do` keyword has been removed, it is now a reserved keyword.
5572 * Default type parameters have been implemented, but are feature gated.
5573 * Borrowed variables through captures in closures are now considered soundly.
5574 * `extern mod` is now `extern crate`
5575 * The `Freeze` trait has been removed.
5576 * The `Share` trait has been added for types that can be shared among
5578 * Labels in macros are now hygienic.
5579 * Expression/statement macro invocations can be delimited with `{}` now.
5580 * Treatment of types allowed in `static mut` locations has been tweaked.
5581 * The `*` and `.` operators are now overloadable through the `Deref` and
5583 * `~Trait` and `proc` no longer have `Send` bounds by default.
5584 * Partial type hints are now supported with the `_` type marker.
5585 * An `Unsafe` type was introduced for interior mutability. It is now
5586 considered undefined to transmute from `&T` to `&mut T` without using the
5588 * The #[linkage] attribute was implemented for extern statics/functions.
5589 * The inner attribute syntax has changed from `#[foo];` to `#![foo]`.
5590 * `Pod` was renamed to `Copy`.
5593 * The `libextra` library has been removed. It has now been decomposed into
5594 component libraries with smaller and more focused nuggets of
5595 functionality. The full list of libraries can be found on the
5596 documentation index page.
5597 * std: `std::condition` has been removed. All I/O errors are now propagated
5598 through the `Result` type. In order to assist with error handling, a
5599 `try!` macro for unwrapping errors with an early return and a lint for
5600 unused results has been added. See #12039 for more information.
5601 * std: The `vec` module has been renamed to `slice`.
5602 * std: A new vector type, `Vec<T>`, has been added in preparation for DST.
5603 This will become the only growable vector in the future.
5604 * std: `std::io` now has more public re-exports. Types such as `BufferedReader`
5605 are now found at `std::io::BufferedReader` instead of
5606 `std::io::buffered::BufferedReader`.
5607 * std: `print` and `println` are no longer in the prelude, the `print!` and
5608 `println!` macros are intended to be used instead.
5609 * std: `Rc` now has a `Weak` pointer for breaking cycles, and it no longer
5610 attempts to statically prevent cycles.
5611 * std: The standard distribution is adopting the policy of pushing failure
5612 to the user rather than failing in libraries. Many functions (such as
5613 `slice::last()`) now return `Option<T>` instead of `T` + failing.
5614 * std: `fmt::Default` has been renamed to `fmt::Show`, and it now has a new
5615 deriving mode: `#[deriving(Show)]`.
5616 * std: `ToStr` is now implemented for all types implementing `Show`.
5617 * std: The formatting trait methods now take `&self` instead of `&T`
5618 * std: The `invert()` method on iterators has been renamed to `rev()`
5619 * std: `std::num` has seen a reduction in the genericity of its traits,
5620 consolidating functionality into a few core traits.
5621 * std: Backtraces are now printed on task failure if the environment
5622 variable `RUST_BACKTRACE` is present.
5623 * std: Naming conventions for iterators have been standardized. More details
5624 can be found on the wiki's style guide.
5625 * std: `eof()` has been removed from the `Reader` trait. Specific types may
5626 still implement the function.
5627 * std: Networking types are now cloneable to allow simultaneous reads/writes.
5628 * std: `assert_approx_eq!` has been removed
5629 * std: The `e` and `E` formatting specifiers for floats have been added to
5630 print them in exponential notation.
5631 * std: The `Times` trait has been removed
5632 * std: Indications of variance and opting out of builtin bounds is done
5633 through marker types in `std::kinds::marker` now
5634 * std: `hash` has been rewritten, `IterBytes` has been removed, and
5635 `#[deriving(Hash)]` is now possible.
5636 * std: `SharedChan` has been removed, `Sender` is now cloneable.
5637 * std: `Chan` and `Port` were renamed to `Sender` and `Receiver`.
5638 * std: `Chan::new` is now `channel()`.
5639 * std: A new synchronous channel type has been implemented.
5640 * std: A `select!` macro is now provided for selecting over `Receiver`s.
5641 * std: `hashmap` and `trie` have been moved to `libcollections`
5642 * std: `run` has been rolled into `io::process`
5643 * std: `assert_eq!` now uses `{}` instead of `{:?}`
5644 * std: The equality and comparison traits have seen some reorganization.
5645 * std: `rand` has moved to `librand`.
5646 * std: `to_{lower,upper}case` has been implemented for `char`.
5647 * std: Logging has been moved to `liblog`.
5648 * collections: `HashMap` has been rewritten for higher performance and less
5650 * native: The default runtime is now `libnative`. If `libgreen` is desired,
5651 it can be booted manually. The runtime guide has more information and
5653 * native: All I/O functionality except signals has been implemented.
5654 * green: Task spawning with `libgreen` has been optimized with stack caching
5655 and various trimming of code.
5656 * green: Tasks spawned by `libgreen` now have an unmapped guard page.
5657 * sync: The `extra::sync` module has been updated to modern rust (and moved
5658 to the `sync` library), tweaking and improving various interfaces while
5659 dropping redundant functionality.
5660 * sync: A new `Barrier` type has been added to the `sync` library.
5661 * sync: An efficient mutex for native and green tasks has been implemented.
5662 * serialize: The `base64` module has seen some improvement. It treats
5663 newlines better, has non-string error values, and has seen general
5665 * fourcc: A `fourcc!` macro was introduced
5666 * hexfloat: A `hexfloat!` macro was implemented for specifying floats via a
5667 hexadecimal literal.
5670 * `rustpkg` has been deprecated and removed from the main repository. Its
5671 replacement, `cargo`, is under development.
5672 * Nightly builds of rust are now available
5673 * The memory usage of rustc has been improved many times throughout this
5675 * The build process supports disabling rpath support for the rustc binary
5677 * Code generation has improved in some cases, giving more information to the
5678 LLVM optimization passes to enable more extensive optimizations.
5679 * Debuginfo compatibility with lldb on OSX has been restored.
5680 * The master branch is now gated on an android bot, making building for
5681 android much more reliable.
5682 * Output flags have been centralized into one `--emit` flag.
5683 * Crate type flags have been centralized into one `--crate-type` flag.
5684 * Codegen flags have been consolidated behind a `-C` flag.
5685 * Linking against outdated crates now has improved error messages.
5686 * Error messages with lifetimes will often suggest how to annotate the
5687 function to fix the error.
5688 * Many more types are documented in the standard library, and new guides
5690 * Many `rustdoc` improvements:
5691 * code blocks are syntax highlighted.
5692 * render standalone markdown files.
5693 * the --test flag tests all code blocks by default.
5694 * exported macros are displayed.
5695 * re-exported types have their documentation inlined at the location of the
5697 * search works across crates that have been rendered to the same output
5701 Version 0.9 (2014-01-09)
5702 ==========================
5704 * ~1800 changes, numerous bugfixes
5707 * The `float` type has been removed. Use `f32` or `f64` instead.
5708 * A new facility for enabling experimental features (feature gating) has
5709 been added, using the crate-level `#[feature(foo)]` attribute.
5710 * Managed boxes (@) are now behind a feature gate
5711 (`#[feature(managed_boxes)]`) in preparation for future removal. Use the
5712 standard library's `Gc` or `Rc` types instead.
5713 * `@mut` has been removed. Use `std::cell::{Cell, RefCell}` instead.
5714 * Jumping back to the top of a loop is now done with `continue` instead of
5716 * Strings can no longer be mutated through index assignment.
5717 * Raw strings can be created via the basic `r"foo"` syntax or with matched
5718 hash delimiters, as in `r###"foo"###`.
5719 * `~fn` is now written `proc (args) -> retval { ... }` and may only be
5721 * The `&fn` type is now written `|args| -> ret` to match the literal form.
5722 * `@fn`s have been removed.
5723 * `do` only works with procs in order to make it obvious what the cost
5725 * Single-element tuple-like structs can no longer be dereferenced to
5726 obtain the inner value. A more comprehensive solution for overloading
5727 the dereference operator will be provided in the future.
5728 * The `#[link(...)]` attribute has been replaced with
5729 `#[crate_id = "name#vers"]`.
5730 * Empty `impl`s must be terminated with empty braces and may not be
5731 terminated with a semicolon.
5732 * Keywords are no longer allowed as lifetime names; the `self` lifetime
5733 no longer has any special meaning.
5734 * The old `fmt!` string formatting macro has been removed.
5735 * `printf!` and `printfln!` (old-style formatting) removed in favor of
5736 `print!` and `println!`.
5737 * `mut` works in patterns now, as in `let (mut x, y) = (1, 2);`.
5738 * The `extern mod foo (name = "bar")` syntax has been removed. Use
5739 `extern mod foo = "bar"` instead.
5740 * New reserved keywords: `alignof`, `offsetof`, `sizeof`.
5741 * Macros can have attributes.
5742 * Macros can expand to items with attributes.
5743 * Macros can expand to multiple items.
5744 * The `asm!` macro is feature-gated (`#[feature(asm)]`).
5745 * Comments may be nested.
5746 * Values automatically coerce to trait objects they implement, without
5748 * Enum discriminants are no longer an entire word but as small as needed to
5749 contain all the variants. The `repr` attribute can be used to override
5750 the discriminant size, as in `#[repr(int)]` for integer-sized, and
5751 `#[repr(C)]` to match C enums.
5752 * Non-string literals are not allowed in attributes (they never worked).
5753 * The FFI now supports variadic functions.
5754 * Octal numeric literals, as in `0o7777`.
5755 * The `concat!` syntax extension performs compile-time string concatenation.
5756 * The `#[fixed_stack_segment]` and `#[rust_stack]` attributes have been
5757 removed as Rust no longer uses segmented stacks.
5758 * Non-ascii identifiers are feature-gated (`#[feature(non_ascii_idents)]`).
5759 * Ignoring all fields of an enum variant or tuple-struct is done with `..`,
5760 not `*`; ignoring remaining fields of a struct is also done with `..`,
5761 not `_`; ignoring a slice of a vector is done with `..`, not `.._`.
5762 * `rustc` supports the "win64" calling convention via `extern "win64"`.
5763 * `rustc` supports the "system" calling convention, which defaults to the
5764 preferred convention for the target platform, "stdcall" on 32-bit Windows,
5766 * The `type_overflow` lint (default: warn) checks literals for overflow.
5767 * The `unsafe_block` lint (default: allow) checks for usage of `unsafe`.
5768 * The `attribute_usage` lint (default: warn) warns about unknown
5770 * The `unknown_features` lint (default: warn) warns about unknown
5772 * The `dead_code` lint (default: warn) checks for dead code.
5773 * Rust libraries can be linked statically to one another
5774 * `#[link_args]` is behind the `link_args` feature gate.
5775 * Native libraries are now linked with `#[link(name = "foo")]`
5776 * Native libraries can be statically linked to a rust crate
5777 (`#[link(name = "foo", kind = "static")]`).
5778 * Native OS X frameworks are now officially supported
5779 (`#[link(name = "foo", kind = "framework")]`).
5780 * The `#[thread_local]` attribute creates thread-local (not task-local)
5781 variables. Currently behind the `thread_local` feature gate.
5782 * The `return` keyword may be used in closures.
5783 * Types that can be copied via a memcpy implement the `Pod` kind.
5784 * The `cfg` attribute can now be used on struct fields and enum variants.
5787 * std: The `option` and `result` API's have been overhauled to make them
5788 simpler, more consistent, and more composable.
5789 * std: The entire `std::io` module has been replaced with one that is
5790 more comprehensive and that properly interfaces with the underlying
5791 scheduler. File, TCP, UDP, Unix sockets, pipes, and timers are all
5793 * std: `io::util` contains a number of useful implementations of
5794 `Reader` and `Writer`, including `NullReader`, `NullWriter`,
5795 `ZeroReader`, `TeeReader`.
5796 * std: The reference counted pointer type `extra::rc` moved into std.
5797 * std: The `Gc` type in the `gc` module will replace `@` (it is currently
5798 just a wrapper around it).
5799 * std: The `Either` type has been removed.
5800 * std: `fmt::Default` can be implemented for any type to provide default
5801 formatting to the `format!` macro, as in `format!("{}", myfoo)`.
5802 * std: The `rand` API continues to be tweaked.
5803 * std: The `rust_begin_unwind` function, useful for inserting breakpoints
5804 on failure in gdb, is now named `rust_fail`.
5805 * std: The `each_key` and `each_value` methods on `HashMap` have been
5806 replaced by the `keys` and `values` iterators.
5807 * std: Functions dealing with type size and alignment have moved from the
5808 `sys` module to the `mem` module.
5809 * std: The `path` module was written and API changed.
5810 * std: `str::from_utf8` has been changed to cast instead of allocate.
5811 * std: `starts_with` and `ends_with` methods added to vectors via the
5812 `ImmutableEqVector` trait, which is in the prelude.
5813 * std: Vectors can be indexed with the `get_opt` method, which returns `None`
5814 if the index is out of bounds.
5815 * std: Task failure no longer propagates between tasks, as the model was
5816 complex, expensive, and incompatible with thread-based tasks.
5817 * std: The `Any` type can be used for dynamic typing.
5818 * std: `~Any` can be passed to the `fail!` macro and retrieved via
5820 * std: Methods that produce iterators generally do not have an `_iter`
5822 * std: `cell::Cell` and `cell::RefCell` can be used to introduce mutability
5823 roots (mutable fields, etc.). Use instead of e.g. `@mut`.
5824 * std: `util::ignore` renamed to `prelude::drop`.
5825 * std: Slices have `sort` and `sort_by` methods via the `MutableVector`
5827 * std: `vec::raw` has seen a lot of cleanup and API changes.
5828 * std: The standard library no longer includes any C++ code, and very
5829 minimal C, eliminating the dependency on libstdc++.
5830 * std: Runtime scheduling and I/O functionality has been factored out into
5831 extensible interfaces and is now implemented by two different crates:
5832 libnative, for native threading and I/O; and libgreen, for green threading
5833 and I/O. This paves the way for using the standard library in more limited
5834 embedded environments.
5835 * std: The `comm` module has been rewritten to be much faster, have a
5836 simpler, more consistent API, and to work for both native and green
5838 * std: All libuv dependencies have been moved into the rustuv crate.
5839 * native: New implementations of runtime scheduling on top of OS threads.
5840 * native: New native implementations of TCP, UDP, file I/O, process spawning,
5842 * green: The green thread scheduler and message passing types are almost
5844 * extra: The `flatpipes` module had bitrotted and was removed.
5845 * extra: All crypto functions have been removed and Rust now has a policy of
5846 not reimplementing crypto in the standard library. In the future crypto
5847 will be provided by external crates with bindings to established libraries.
5848 * extra: `c_vec` has been modernized.
5849 * extra: The `sort` module has been removed. Use the `sort` method on
5853 * The `rust` and `rusti` commands have been removed, due to lack of
5855 * `rustdoc` was completely rewritten.
5856 * `rustdoc` can test code examples in documentation.
5857 * `rustpkg` can test packages with the argument, 'test'.
5858 * `rustpkg` supports arbitrary dependencies, including C libraries.
5859 * `rustc`'s support for generating debug info is improved again.
5860 * `rustc` has better error reporting for unbalanced delimiters.
5861 * `rustc`'s JIT support was removed due to bitrot.
5862 * Executables and static libraries can be built with LTO (-Z lto)
5863 * `rustc` adds a `--dep-info` flag for communicating dependencies to
5867 Version 0.8 (2013-09-26)
5868 ============================
5870 * ~2200 changes, numerous bugfixes
5873 * The `for` loop syntax has changed to work with the `Iterator` trait.
5874 * At long last, unwinding works on Windows.
5875 * Default methods are ready for use.
5876 * Many trait inheritance bugs fixed.
5877 * Owned and borrowed trait objects work more reliably.
5878 * `copy` is no longer a keyword. It has been replaced by the `Clone` trait.
5879 * rustc can omit emission of code for the `debug!` macro if it is passed
5881 * mod.rs is now "blessed". When loading `mod foo;`, rustc will now look
5882 for foo.rs, then foo/mod.rs, and will generate an error when both are
5884 * Strings no longer contain trailing nulls. The new `std::c_str` module
5885 provides new mechanisms for converting to C strings.
5886 * The type of foreign functions is now `extern "C" fn` instead of `*u8'.
5887 * The FFI has been overhauled such that foreign functions are called directly,
5888 instead of through a stack-switching wrapper.
5889 * Calling a foreign function must be done through a Rust function with the
5890 `#[fixed_stack_segment]` attribute.
5891 * The `externfn!` macro can be used to declare both a foreign function and
5892 a `#[fixed_stack_segment]` wrapper at once.
5893 * `pub` and `priv` modifiers on `extern` blocks are no longer parsed.
5894 * `unsafe` is no longer allowed on extern fns - they are all unsafe.
5895 * `priv` is disallowed everywhere except for struct fields and enum variants.
5896 * `&T` (besides `&'static T`) is no longer allowed in `@T`.
5897 * `ref` bindings in irrefutable patterns work correctly now.
5898 * `char` is now prevented from containing invalid code points.
5899 * Casting to `bool` is no longer allowed.
5900 * `\0` is now accepted as an escape in chars and strings.
5901 * `yield` is a reserved keyword.
5902 * `typeof` is a reserved keyword.
5903 * Crates may be imported by URL with `extern mod foo = "url";`.
5904 * Explicit enum discriminants may be given as uints as in `enum E { V = 0u }`
5905 * Static vectors can be initialized with repeating elements,
5906 e.g. `static foo: [u8, .. 100]: [0, .. 100];`.
5907 * Static structs can be initialized with functional record update,
5908 e.g. `static foo: Foo = Foo { a: 5, .. bar };`.
5909 * `cfg!` can be used to conditionally execute code based on the crate
5910 configuration, similarly to `#[cfg(...)]`.
5911 * The `unnecessary_qualification` lint detects unneeded module
5912 prefixes (default: allow).
5913 * Arithmetic operations have been implemented on the SIMD types in
5914 `std::unstable::simd`.
5915 * Exchange allocation headers were removed, reducing memory usage.
5916 * `format!` implements a completely new, extensible, and higher-performance
5917 string formatting system. It will replace `fmt!`.
5918 * `print!` and `println!` write formatted strings (using the `format!`
5919 extension) to stdout.
5920 * `write!` and `writeln!` write formatted strings (using the `format!`
5921 extension) to the new Writers in `std::rt::io`.
5922 * The library section in which a function or static is placed may
5923 be specified with `#[link_section = "..."]`.
5924 * The `proto!` syntax extension for defining bounded message protocols
5926 * `macro_rules!` is hygienic for `let` declarations.
5927 * The `#[export_name]` attribute specifies the name of a symbol.
5928 * `unreachable!` can be used to indicate unreachable code, and fails
5932 * std: Transitioned to the new runtime, written in Rust.
5933 * std: Added an experimental I/O library, `rt::io`, based on the new
5935 * std: A new generic `range` function was added to the prelude, replacing
5936 `uint::range` and friends.
5937 * std: `range_rev` no longer exists. Since range is an iterator it can be
5938 reversed with `range(lo, hi).invert()`.
5939 * std: The `chain` method on option renamed to `and_then`; `unwrap_or_default`
5940 renamed to `unwrap_or`.
5941 * std: The `iterator` module was renamed to `iter`.
5942 * std: Integral types now support the `checked_add`, `checked_sub`, and
5943 `checked_mul` operations for detecting overflow.
5944 * std: Many methods in `str`, `vec`, `option, `result` were renamed for
5946 * std: Methods are standardizing on conventions for casting methods:
5947 `to_foo` for copying, `into_foo` for moving, `as_foo` for temporary
5949 * std: The `CString` type in `c_str` provides new ways to convert to and
5951 * std: `DoubleEndedIterator` can yield elements in two directions.
5952 * std: The `mut_split` method on vectors partitions an `&mut [T]` into
5954 * std: `str::from_bytes` renamed to `str::from_utf8`.
5955 * std: `pop_opt` and `shift_opt` methods added to vectors.
5956 * std: The task-local data interface no longer uses @, and keys are
5957 no longer function pointers.
5958 * std: The `swap_unwrap` method of `Option` renamed to `take_unwrap`.
5959 * std: Added `SharedPort` to `comm`.
5960 * std: `Eq` has a default method for `ne`; only `eq` is required
5962 * std: `Ord` has default methods for `le`, `gt` and `ge`; only `lt`
5963 is required in implementations.
5964 * std: `is_utf8` performance is improved, impacting many string functions.
5965 * std: `os::MemoryMap` provides cross-platform mmap.
5966 * std: `ptr::offset` is now unsafe, but also more optimized. Offsets that
5967 are not 'in-bounds' are considered undefined.
5968 * std: Many freestanding functions in `vec` removed in favor of methods.
5969 * std: Many freestanding functions on scalar types removed in favor of
5971 * std: Many options to task builders were removed since they don't make
5972 sense in the new scheduler design.
5973 * std: More containers implement `FromIterator` so can be created by the
5975 * std: More complete atomic types in `unstable::atomics`.
5976 * std: `comm::PortSet` removed.
5977 * std: Mutating methods in the `Set` and `Map` traits have been moved into
5978 the `MutableSet` and `MutableMap` traits. `Container::is_empty`,
5979 `Map::contains_key`, `MutableMap::insert`, and `MutableMap::remove` have
5980 default implementations.
5981 * std: Various `from_str` functions were removed in favor of a generic
5982 `from_str` which is available in the prelude.
5983 * std: `util::unreachable` removed in favor of the `unreachable!` macro.
5984 * extra: `dlist`, the doubly-linked list was modernized.
5985 * extra: Added a `hex` module with `ToHex` and `FromHex` traits.
5986 * extra: Added `glob` module, replacing `std::os::glob`.
5987 * extra: `rope` was removed.
5988 * extra: `deque` was renamed to `ringbuf`. `RingBuf` implements `Deque`.
5989 * extra: `net`, and `timer` were removed. The experimental replacements
5990 are `std::rt::io::net` and `std::rt::io::timer`.
5991 * extra: Iterators implemented for `SmallIntMap`.
5992 * extra: Iterators implemented for `Bitv` and `BitvSet`.
5993 * extra: `SmallIntSet` removed. Use `BitvSet`.
5994 * extra: Performance of JSON parsing greatly improved.
5995 * extra: `semver` updated to SemVer 2.0.0.
5996 * extra: `term` handles more terminals correctly.
5997 * extra: `dbg` module removed.
5998 * extra: `par` module removed.
5999 * extra: `future` was cleaned up, with some method renames.
6000 * extra: Most free functions in `getopts` were converted to methods.
6003 * rustc's debug info generation (`-Z debug-info`) is greatly improved.
6004 * rustc accepts `--target-cpu` to compile to a specific CPU architecture,
6005 similarly to gcc's `--march` flag.
6006 * rustc's performance compiling small crates is much better.
6007 * rustpkg has received many improvements.
6008 * rustpkg supports git tags as package IDs.
6009 * rustpkg builds into target-specific directories so it can be used for
6011 * The number of concurrent test tasks is controlled by the environment
6012 variable RUST_TEST_TASKS.
6013 * The test harness can now report metrics for benchmarks.
6014 * All tools have man pages.
6015 * Programs compiled with `--test` now support the `-h` and `--help` flags.
6016 * The runtime uses jemalloc for allocations.
6017 * Segmented stacks are temporarily disabled as part of the transition to
6018 the new runtime. Stack overflows are possible!
6019 * A new documentation backend, rustdoc_ng, is available for use. It is
6020 still invoked through the normal `rustdoc` command.
6023 Version 0.7 (2013-07-03)
6024 =======================
6026 * ~2000 changes, numerous bugfixes
6029 * `impl`s no longer accept a visibility qualifier. Put them on methods
6031 * The borrow checker has been rewritten with flow-sensitivity, fixing
6032 many bugs and inconveniences.
6033 * The `self` parameter no longer implicitly means `&'self self`,
6034 and can be explicitly marked with a lifetime.
6035 * Overloadable compound operators (`+=`, etc.) have been temporarily
6036 removed due to bugs.
6037 * The `for` loop protocol now requires `for`-iterators to return `bool`
6038 so they compose better.
6039 * The `Durable` trait is replaced with the `'static` bounds.
6040 * Trait default methods work more often.
6041 * Structs with the `#[packed]` attribute have byte alignment and
6042 no padding between fields.
6043 * Type parameters bound by `Copy` must now be copied explicitly with
6045 * It is now illegal to move out of a dereferenced unsafe pointer.
6046 * `Option<~T>` is now represented as a nullable pointer.
6047 * `@mut` does dynamic borrow checks correctly.
6048 * The `main` function is only detected at the topmost level of the crate.
6049 The `#[main]` attribute is still valid anywhere.
6050 * Struct fields may no longer be mutable. Use inherited mutability.
6051 * The `#[no_send]` attribute makes a type that would otherwise be
6053 * The `#[no_freeze]` attribute makes a type that would otherwise be
6055 * Unbounded recursion will abort the process after reaching the limit
6056 specified by the `RUST_MAX_STACK` environment variable (default: 1GB).
6057 * The `vecs_implicitly_copyable` lint mode has been removed. Vectors
6058 are never implicitly copyable.
6059 * `#[static_assert]` makes compile-time assertions about static bools.
6060 * At long last, 'argument modes' no longer exist.
6061 * The rarely used `use mod` statement no longer exists.
6064 * `fail!` and `assert!` accept `~str`, `&'static str` or `fmt!`-style
6066 * `Encodable`, `Decodable`, `Ord`, `TotalOrd`, `TotalEq`, `DeepClone`,
6067 `Rand`, `Zero` and `ToStr` can all be automatically derived with
6069 * The `bytes!` macro returns a vector of bytes for string, u8, char,
6070 and unsuffixed integer literals.
6073 * The `core` crate was renamed to `std`.
6074 * The `std` crate was renamed to `extra`.
6075 * More and improved documentation.
6076 * std: `iterator` module for external iterator objects.
6077 * Many old-style (internal, higher-order function) iterators replaced by
6078 implementations of `Iterator`.
6079 * std: Many old internal vector and string iterators,
6080 incl. `any`, `all`. removed.
6081 * std: The `finalize` method of `Drop` renamed to `drop`.
6082 * std: The `drop` method now takes `&mut self` instead of `&self`.
6083 * std: The prelude no longer re-exports any modules, only types and traits.
6084 * std: Prelude additions: `print`, `println`, `FromStr`, `ApproxEq`, `Equiv`,
6085 `Iterator`, `IteratorUtil`, many numeric traits, many tuple traits.
6086 * std: New numeric traits: `Fractional`, `Real`, `RealExt`, `Integer`, `Ratio`,
6087 `Algebraic`, `Trigonometric`, `Exponential`, `Primitive`.
6088 * std: Tuple traits and accessors defined for up to 12-tuples, e.g.
6089 `(0, 1, 2).n2()` or `(0, 1, 2).n2_ref()`.
6090 * std: Many types implement `Clone`.
6091 * std: `path` type renamed to `Path`.
6092 * std: `mut` module and `Mut` type removed.
6093 * std: Many standalone functions removed in favor of methods and iterators
6094 in `vec`, `str`. In the future methods will also work as functions.
6095 * std: `reinterpret_cast` removed. Use `transmute`.
6096 * std: ascii string handling in `std::ascii`.
6097 * std: `Rand` is implemented for ~/@.
6098 * std: `run` module for spawning processes overhauled.
6099 * std: Various atomic types added to `unstable::atomic`.
6100 * std: Various types implement `Zero`.
6101 * std: `LinearMap` and `LinearSet` renamed to `HashMap` and `HashSet`.
6102 * std: Borrowed pointer functions moved from `ptr` to `borrow`.
6103 * std: Added `os::mkdir_recursive`.
6104 * std: Added `os::glob` function performs filesystems globs.
6105 * std: `FuzzyEq` renamed to `ApproxEq`.
6106 * std: `Map` now defines `pop` and `swap` methods.
6107 * std: `Cell` constructors converted to static methods.
6108 * extra: `rc` module adds the reference counted pointers, `Rc` and `RcMut`.
6109 * extra: `flate` module moved from `std` to `extra`.
6110 * extra: `fileinput` module for iterating over a series of files.
6111 * extra: `Complex` number type and `complex` module.
6112 * extra: `Rational` number type and `rational` module.
6113 * extra: `BigInt`, `BigUint` implement numeric and comparison traits.
6114 * extra: `term` uses terminfo now, is more correct.
6115 * extra: `arc` functions converted to methods.
6116 * extra: Implementation of fixed output size variations of SHA-2.
6119 * `unused_variable` lint mode for unused variables (default: warn).
6120 * `unused_unsafe` lint mode for detecting unnecessary `unsafe` blocks
6122 * `unused_mut` lint mode for identifying unused `mut` qualifiers
6124 * `dead_assignment` lint mode for unread variables (default: warn).
6125 * `unnecessary_allocation` lint mode detects some heap allocations that are
6126 immediately borrowed so could be written without allocating (default: warn).
6127 * `missing_doc` lint mode (default: allow).
6128 * `unreachable_code` lint mode (default: warn).
6129 * The `rusti` command has been rewritten and a number of bugs addressed.
6130 * rustc outputs in color on more terminals.
6131 * rustc accepts a `--link-args` flag to pass arguments to the linker.
6132 * rustc accepts a `-Z print-link-args` flag for debugging linkage.
6133 * Compiling with `-g` will make the binary record information about
6134 dynamic borrowcheck failures for debugging.
6135 * rustdoc has a nicer stylesheet.
6136 * Various improvements to rustdoc.
6137 * Improvements to rustpkg (see the detailed release notes).
6140 Version 0.6 (2013-04-03)
6141 ========================
6143 * ~2100 changes, numerous bugfixes
6146 * The self type parameter in traits is now spelled `Self`
6147 * The `self` parameter in trait and impl methods must now be explicitly
6148 named (for example: `fn f(&self) { }`). Implicit self is deprecated.
6149 * Static methods no longer require the `static` keyword and instead
6150 are distinguished by the lack of a `self` parameter
6151 * Replaced the `Durable` trait with the `'static` lifetime
6152 * The old closure type syntax with the trailing sigil has been
6153 removed in favor of the more consistent leading sigil
6154 * `super` is a keyword, and may be prefixed to paths
6155 * Trait bounds are separated with `+` instead of whitespace
6156 * Traits are implemented with `impl Trait for Type`
6157 instead of `impl Type: Trait`
6158 * Lifetime syntax is now `&'l foo` instead of `&l/foo`
6159 * The `export` keyword has finally been removed
6160 * The `move` keyword has been removed (see "Semantic changes")
6161 * The interior mutability qualifier on vectors, `[mut T]`, has been
6162 removed. Use `&mut [T]`, etc.
6163 * `mut` is no longer valid in `~mut T`. Use inherited mutability
6164 * `fail` is no longer a keyword. Use `fail!()`
6165 * `assert` is no longer a keyword. Use `assert!()`
6166 * `log` is no longer a keyword. use `debug!`, etc.
6167 * 1-tuples may be represented as `(T,)`
6168 * Struct fields may no longer be `mut`. Use inherited mutability,
6169 `@mut T`, `core::mut` or `core::cell`
6170 * `extern mod { ... }` is no longer valid syntax for foreign
6171 function modules. Use extern blocks: `extern { ... }`
6172 * Newtype enums removed. Use tuple-structs.
6173 * Trait implementations no longer support visibility modifiers
6174 * Pattern matching over vectors improved and expanded
6175 * `const` renamed to `static` to correspond to lifetime name,
6176 and make room for future `static mut` unsafe mutable globals.
6177 * Replaced `#[deriving_eq]` with `#[deriving(Eq)]`, etc.
6178 * `Clone` implementations can be automatically generated with
6179 `#[deriving(Clone)]`
6180 * Casts to traits must use a pointer sigil, e.g. `@foo as @Bar`
6181 instead of `foo as Bar`.
6182 * Fixed length vector types are now written as `[int, .. 3]`
6183 instead of `[int * 3]`.
6184 * Fixed length vector types can express the length as a constant
6185 expression. (ex: `[int, .. GL_BUFFER_SIZE - 2]`)
6188 * Types with owned pointers or custom destructors move by default,
6189 eliminating the `move` keyword
6190 * All foreign functions are considered unsafe
6191 * &mut is now unaliasable
6192 * Writes to borrowed @mut pointers are prevented dynamically
6194 * The name of the main function can be customized using #[main]
6195 * The default type of an inferred closure is &fn instead of @fn
6196 * `use` statements may no longer be "chained" - they cannot import
6197 identifiers imported by previous `use` statements
6198 * `use` statements are crate relative, importing from the "top"
6199 of the crate by default. Paths may be prefixed with `super::`
6200 or `self::` to change the search behavior.
6201 * Method visibility is inherited from the implementation declaration
6202 * Structural records have been removed
6203 * Many more types can be used in static items, including enums
6204 'static-lifetime pointers and vectors
6205 * Pattern matching over vectors improved and expanded
6206 * Typechecking of closure types has been overhauled to
6207 improve inference and eliminate unsoundness
6208 * Macros leave scope at the end of modules, unless that module is
6209 tagged with #[macro_escape]
6212 * Added big integers to `std::bigint`
6213 * Removed `core::oldcomm` module
6214 * Added pipe-based `core::comm` module
6215 * Numeric traits have been reorganized under `core::num`
6216 * `vec::slice` finally returns a slice
6217 * `debug!` and friends don't require a format string, e.g. `debug!(Foo)`
6218 * Containers reorganized around traits in `core::container`
6219 * `core::dvec` removed, `~[T]` is a drop-in replacement
6220 * `core::send_map` renamed to `core::hashmap`
6221 * `std::map` removed; replaced with `core::hashmap`
6222 * `std::treemap` reimplemented as an owned balanced tree
6223 * `std::deque` and `std::smallintmap` reimplemented as owned containers
6224 * `core::trie` added as a fast ordered map for integer keys
6225 * Set types added to `core::hashmap`, `core::trie` and `std::treemap`
6226 * `Ord` split into `Ord` and `TotalOrd`. `Ord` is still used to
6227 overload the comparison operators, whereas `TotalOrd` is used
6228 by certain container types
6231 * Replaced the 'cargo' package manager with 'rustpkg'
6232 * Added all-purpose 'rust' tool
6233 * `rustc --test` now supports benchmarks with the `#[bench]` attribute
6234 * rustc now *attempts* to offer spelling suggestions
6235 * Improved support for ARM and Android
6236 * Preliminary MIPS backend
6237 * Improved foreign function ABI implementation for x86, x86_64
6238 * Various memory usage improvements
6239 * Rust code may be embedded in foreign code under limited circumstances
6240 * Inline assembler supported by new asm!() syntax extension.
6243 Version 0.5 (2012-12-21)
6244 ===========================
6246 * ~900 changes, numerous bugfixes
6249 * Removed `<-` move operator
6250 * Completed the transition from the `#fmt` extension syntax to `fmt!`
6251 * Removed old fixed length vector syntax - `[T]/N`
6252 * New token-based quasi-quoters, `quote_tokens!`, `quote_expr!`, etc.
6253 * Macros may now expand to items and statements
6254 * `a.b()` is always parsed as a method call, never as a field projection
6255 * `Eq` and `IterBytes` implementations can be automatically generated
6256 with `#[deriving_eq]` and `#[deriving_iter_bytes]` respectively
6257 * Removed the special crate language for `.rc` files
6258 * Function arguments may consist of any irrefutable pattern
6261 * `&` and `~` pointers may point to objects
6262 * Tuple structs - `struct Foo(Bar, Baz)`. Will replace newtype enums.
6263 * Enum variants may be structs
6264 * Destructors can be added to all nominal types with the Drop trait
6265 * Structs and nullary enum variants may be constants
6266 * Values that cannot be implicitly copied are now automatically moved
6267 without writing `move` explicitly
6268 * `&T` may now be coerced to `*T`
6269 * Coercions happen in `let` statements as well as function calls
6270 * `use` statements now take crate-relative paths
6271 * The module and type namespaces have been merged so that static
6272 method names can be resolved under the trait in which they are
6275 * Improved support for language features
6276 * Trait inheritance works in many scenarios
6277 * More support for explicit self arguments in methods - `self`, `&self`
6278 `@self`, and `~self` all generally work as expected
6279 * Static methods work in more situations
6280 * Experimental: Traits may declare default methods for the implementations
6284 * New condition handling system in `core::condition`
6285 * Timsort added to `std::sort`
6286 * New priority queue, `std::priority_queue`
6287 * Pipes for serializable types, `std::flatpipes'
6288 * Serialization overhauled to be trait-based
6289 * Expanded `getopts` definitions
6290 * Moved futures to `std`
6291 * More functions are pure now
6292 * `core::comm` renamed to `oldcomm`. Still deprecated
6293 * `rustdoc` and `cargo` are libraries now
6296 * Added a preliminary REPL, `rusti`
6297 * License changed from MIT to dual MIT/APL2
6300 Version 0.4 (2012-10-15)
6301 ==========================
6303 * ~2000 changes, numerous bugfixes
6306 * All keywords are now strict and may not be used as identifiers anywhere
6307 * Keyword removal: 'again', 'import', 'check', 'new', 'owned', 'send',
6308 'of', 'with', 'to', 'class'.
6309 * Classes are replaced with simpler structs
6310 * Explicit method self types
6311 * `ret` became `return` and `alt` became `match`
6312 * `import` is now `use`; `use is now `extern mod`
6313 * `extern mod { ... }` is now `extern { ... }`
6314 * `use mod` is the recommended way to import modules
6315 * `pub` and `priv` replace deprecated export lists
6316 * The syntax of `match` pattern arms now uses fat arrow (=>)
6317 * `main` no longer accepts an args vector; use `os::args` instead
6320 * Trait implementations are now coherent, ala Haskell typeclasses
6321 * Trait methods may be static
6322 * Argument modes are deprecated
6323 * Borrowed pointers are much more mature and recommended for use
6324 * Strings and vectors in the static region are stored in constant memory
6325 * Typestate was removed
6326 * Resolution rewritten to be more reliable
6327 * Support for 'dual-mode' data structures (freezing and thawing)
6330 * Most binary operators can now be overloaded via the traits in
6332 * `std::net::url` for representing URLs
6333 * Sendable hash maps in `core::send_map`
6334 * `core::task' gained a (currently unsafe) task-local storage API
6337 * An efficient new intertask communication primitive called the pipe,
6338 along with a number of higher-level channel types, in `core::pipes`
6339 * `std::arc`, an atomically reference counted, immutable, shared memory
6341 * `std::sync`, various exotic synchronization tools based on arcs and pipes
6342 * Futures are now based on pipes and sendable
6343 * More robust linked task failure
6344 * Improved task builder API
6347 * Improved error reporting
6348 * Preliminary JIT support
6349 * Preliminary work on precise GC
6350 * Extensive architectural improvements to rustc
6351 * Begun a transition away from buggy C++-based reflection (shape) code to
6352 Rust-based (visitor) code
6353 * All hash functions and tables converted to secure, randomized SipHash
6356 Version 0.3 (2012-07-12)
6357 ========================
6359 * ~1900 changes, numerous bugfixes
6361 * New coding conveniences
6362 * Integer-literal suffix inference
6363 * Per-item control over warnings, errors
6364 * #[cfg(windows)] and #[cfg(unix)] attributes
6365 * Documentation comments
6366 * More compact closure syntax
6367 * 'do' expressions for treating higher-order functions as
6369 * *-patterns (wildcard extended to all constructor fields)
6372 * Name resolution pass and exhaustiveness checker rewritten
6373 * Region pointers and borrow checking supersede alias
6375 * Init-ness checking is now provided by a region-based liveness
6376 pass instead of the typestate pass; same for last-use analysis
6377 * Extensive work on region pointers
6379 * Experimental new language features
6380 * Slices and fixed-size, interior-allocated vectors
6381 * #!-comments for lang versioning, shell execution
6382 * Destructors and iface implementation for classes;
6383 type-parameterized classes and class methods
6384 * 'const' type kind for types that can be used to implement
6385 shared-memory concurrency patterns
6389 * Removal of various obsolete features
6390 * Keywords: 'be', 'prove', 'syntax', 'note', 'mutable', 'bind',
6391 'crust', 'native' (now 'extern'), 'cont' (now 'again')
6393 * Constructs: do-while loops ('do' repurposed), fn binding,
6394 resources (replaced by destructors)
6396 * Compiler reorganization
6397 * Syntax-layer of compiler split into separate crate
6398 * Clang (from LLVM project) integrated into build
6399 * Typechecker split into sub-modules
6402 * New time functions
6403 * Extension methods for many built-in types
6404 * Arc: atomic-refcount read-only / exclusive-use shared cells
6405 * Par: parallel map and search routines
6406 * Extensive work on libuv interface
6407 * Much vector code moved to libraries
6408 * Syntax extensions: #line, #col, #file, #mod, #stringify,
6409 #include, #include_str, #include_bin
6412 * Cargo automatically resolves dependencies
6415 Version 0.2 (2012-03-29)
6416 =========================
6418 * >1500 changes, numerous bugfixes
6420 * New docs and doc tooling
6422 * New port: FreeBSD x86_64
6424 * Compilation model enhancements
6425 * Generics now specialized, multiply instantiated
6426 * Functions now inlined across separate crates
6428 * Scheduling, stack and threading fixes
6429 * Noticeably improved message-passing performance
6430 * Explicit schedulers
6434 * Experimental new language features
6435 * Operator overloading
6439 * Various language extensions
6440 * C-callback function types: 'crust fn ...'
6441 * Infinite-loop construct: 'loop { ... }'
6442 * Shorten 'mutable' to 'mut'
6443 * Required mutable-local qualifier: 'let mut ...'
6444 * Basic glob-exporting: 'export foo::*;'
6445 * Alt now exhaustive, 'alt check' for runtime-checked
6446 * Block-function form of 'for' loop, with 'break' and 'ret'.
6449 * AST quasi-quote syntax extension
6450 * Revived libuv interface
6451 * New modules: core::{future, iter}, std::arena
6452 * Merged per-platform std::{os*, fs*} to core::{libc, os}
6453 * Extensive cleanup, regularization in libstd, libcore
6456 Version 0.1 (2012-01-20)
6457 ===============================
6459 * Most language features work, including:
6460 * Unique pointers, unique closures, move semantics
6461 * Interface-constrained generics
6462 * Static interface dispatch
6464 * Multithread task scheduling
6465 * Typestate predicates
6466 * Failure unwinding, destructors
6467 * Pattern matching and destructuring assignment
6468 * Lightweight block-lambda syntax
6469 * Preliminary macro-by-example
6471 * Compiler works with the following configurations:
6472 * Linux: x86 and x86_64 hosts and targets
6473 * macOS: x86 and x86_64 hosts and targets
6474 * Windows: x86 hosts and targets
6476 * Cross compilation / multi-target configuration supported.
6478 * Preliminary API-documentation and package-management tools included.
6482 * Documentation is incomplete.
6484 * Performance is below intended target.
6486 * Standard library APIs are subject to extensive change, reorganization.
6488 * Language-level versioning is not yet operational - future code will