1 Version 1.27.0 (2018-06-21)
2 ==========================
6 - [Removed 'proc' from the reserved keywords list.][49699] This allows `proc` to
7 be used as an identifer.
8 - [The dyn syntax is now available.][49968] This syntax is equivalent to the
9 bare `Trait` syntax, and should make it clearer when being used in tandem with
10 `impl Trait`. Since it is equivalent to the following syntax:
11 `&Trait == &dyn Trait`, `&mut Trait == &mut dyn Trait`, and
12 `Box<Trait> == Box<dyn Trait>`.
13 - [Attributes on generic parameters such as types and lifetimes are
14 now stable.][48851] e.g.
15 `fn foo<#[lifetime_attr] 'a, #[type_attr] T: 'a>() {}`
16 - [The `#[must_use]` attribute can now also be used on functions as well as
17 types.][48925] It provides a lint that by default warns users when the
18 value returned by a function has not been used.
22 - [Added the `armv5te-unknown-linux-musl` target.][50423]
26 - [SIMD (Single Instruction Multiple Data) on x86/x86_64 is now stable.][49664]
27 This includes [`arch::x86`] & [`arch::x86_64`] modules which contain
28 SIMD intrinsics, a new macro called `is_x86_feature_detected!`, the
29 `#[target_feature(enable="")]` attribute, and adding `target_feature = ""` to
31 - [A lot of methods for `[u8]`, `f32`, and `f64` previously only available in
32 std are now available in core.][49896]
33 - [The generic `Rhs` type parameter on `ops::{Shl, ShlAssign, Shr}` now defaults
35 - [`std::str::replace` now has the `#[must_use]` attribute][50177] to clarify
36 that the operation isn't done in place.
37 - [`Clone::clone`, `Iterator::collect`, and `ToOwned::to_owned` now have
38 the `#[must_use]` attribute][49533] to warn about unused potentially
39 expensive allocations.
43 - [`DoubleEndedIterator::rfind`]
44 - [`DoubleEndedIterator::rfold`]
45 - [`DoubleEndedIterator::try_rfold`]
46 - [`Duration::from_micros`]
47 - [`Duration::from_nanos`]
48 - [`Duration::subsec_micros`]
49 - [`Duration::subsec_millis`]
50 - [`HashMap::remove_entry`]
51 - [`Iterator::try_fold`]
52 - [`Iterator::try_for_each`]
55 - [`String::replace_range`]
57 - [`hint::unreachable_unchecked`]
58 - [`os::unix::process::parent_id`]
59 - [`ptr::swap_nonoverlapping`]
60 - [`slice::rsplit_mut`]
62 - [`slice::swap_with_slice`]
66 - [`cargo-metadata` now includes `authors`, `categories`, `keywords`,
67 `readme`, and `repository` fields.][cargo/5386]
68 - [Added the `--target-dir` optional argument.][cargo/5393] This allows you to specify
69 a different directory than `target` for placing compilation artifacts.
70 - [Cargo will be adding automatic target inference for binaries, benchmarks,
71 examples, and tests in the Rust 2018 edition.][cargo/5335] If your project specifies
72 specific targets e.g. using `[[bin]]` and have other binaries in locations
73 where cargo would infer a binary, Cargo will produce a warning. You can
74 disable this feature ahead of time by setting any of the following `autobins`,
75 `autobenches`, `autoexamples`, `autotests` to false.
76 - [Cargo will now cache compiler information.][cargo/5359] This can be disabled by
77 setting `CARGO_CACHE_RUSTC_INFO=0` in your environment.
81 - [Added “The Rustc book” into the official documentation.][49707]
82 [“The Rustc book”] documents and teaches how to use the rustc compiler.
83 - [All books available on `doc.rust-lang.org` are now searchable.][49623]
87 - [Calling a `CharExt` or `StrExt` method directly on core will no longer
88 work.][49896] e.g. `::core::prelude::v1::StrExt::is_empty("")` will not
89 compile, `"".is_empty()` will still compile.
90 - [`Debug` output on `atomic::{AtomicBool, AtomicIsize, AtomicPtr, AtomicUsize}`
91 will only print the inner type.][48553] e.g.
92 `print!("{:?}", AtomicBool::new(true))` will print `true`
93 not `AtomicBool(true)`.
94 - [The maximum number for `repr(align(N))` is now 2²⁹.][50378] Previously you
95 could enter higher numbers but they were not supported by LLVM. Up to 512MB
96 alignment should cover all use cases.
98 [48553]: https://github.com/rust-lang/rust/pull/48553/
99 [48851]: https://github.com/rust-lang/rust/pull/48851/
100 [48925]: https://github.com/rust-lang/rust/pull/48925/
101 [49533]: https://github.com/rust-lang/rust/pull/49533/
102 [49623]: https://github.com/rust-lang/rust/pull/49623/
103 [49630]: https://github.com/rust-lang/rust/pull/49630/
104 [49664]: https://github.com/rust-lang/rust/pull/49664/
105 [49699]: https://github.com/rust-lang/rust/pull/49699/
106 [49707]: https://github.com/rust-lang/rust/pull/49707/
107 [49719]: https://github.com/rust-lang/rust/pull/49719/
108 [49896]: https://github.com/rust-lang/rust/pull/49896/
109 [49968]: https://github.com/rust-lang/rust/pull/49968/
110 [50177]: https://github.com/rust-lang/rust/pull/50177/
111 [50378]: https://github.com/rust-lang/rust/pull/50378/
112 [50398]: https://github.com/rust-lang/rust/pull/50398/
113 [50423]: https://github.com/rust-lang/rust/pull/50423/
114 [cargo/5203]: https://github.com/rust-lang/cargo/pull/5203/
115 [cargo/5335]: https://github.com/rust-lang/cargo/pull/5335/
116 [cargo/5359]: https://github.com/rust-lang/cargo/pull/5359/
117 [cargo/5386]: https://github.com/rust-lang/cargo/pull/5386/
118 [cargo/5393]: https://github.com/rust-lang/cargo/pull/5393/
119 [`DoubleEndedIterator::rfind`]: https://doc.rust-lang.org/std/iter/trait.DoubleEndedIterator.html#method.rfind
120 [`DoubleEndedIterator::rfold`]: https://doc.rust-lang.org/std/iter/trait.DoubleEndedIterator.html#method.rfold
121 [`DoubleEndedIterator::try_rfold`]: https://doc.rust-lang.org/std/iter/trait.DoubleEndedIterator.html#method.try_rfold
122 [`Duration::from_micros`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.from_micros
123 [`Duration::from_nanos`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.from_nanos
124 [`Duration::subsec_micros`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.subsec_micros
125 [`Duration::subsec_millis`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.subsec_millis
126 [`HashMap::remove_entry`]: https://doc.rust-lang.org/std/collections/struct.HashMap.html#method.remove_entry
127 [`Iterator::try_fold`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.try_fold
128 [`Iterator::try_for_each`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.try_for_each
129 [`NonNull::cast`]: https://doc.rust-lang.org/std/ptr/struct.NonNull.html#method.cast
130 [`Option::filter`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.filter
131 [`String::replace_range`]: https://doc.rust-lang.org/std/string/struct.String.html#method.replace_range
132 [`Take::set_limit`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.set_limit
133 [`hint::unreachable_unchecked`]: https://doc.rust-lang.org/std/hint/fn.unreachable_unchecked.html
134 [`os::unix::process::parent_id`]: https://doc.rust-lang.org/std/os/unix/process/fn.parent_id.html
135 [`process::id`]: https://doc.rust-lang.org/std/process/fn.id.html
136 [`ptr::swap_nonoverlapping`]: https://doc.rust-lang.org/std/ptr/fn.swap_nonoverlapping.html
137 [`slice::rsplit_mut`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rsplit_mut
138 [`slice::rsplit`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rsplit
139 [`slice::swap_with_slice`]: https://doc.rust-lang.org/std/primitive.slice.html#method.swap_with_slice
140 [`arch::x86_64`]: https://doc.rust-lang.org/std/arch/x86_64/index.html
141 [`arch::x86`]: https://doc.rust-lang.org/std/arch/x86/index.html
142 [“The Rustc book”]: https://doc.rust-lang.org/rustc
145 Version 1.26.2 (2018-06-05)
146 ==========================
151 - [The borrow checker was fixed to avoid unsoundness when using match ergonomics][51117]
153 [51117]: https://github.com/rust-lang/rust/issues/51117
156 Version 1.26.1 (2018-05-29)
157 ==========================
162 - [RLS now works on Windows][50646]
163 - [Rustfmt stopped badly formatting text in some cases][rustfmt/2695]
169 - [`fn main() -> impl Trait` no longer works for non-Termination
171 This reverts an accidental stabilization.
172 - [`NaN > NaN` no longer returns true in const-fn contexts][50812]
173 - [Prohibit using turbofish for `impl Trait` in method arguments][50950]
175 [50646]: https://github.com/rust-lang/rust/issues/50646
176 [50656]: https://github.com/rust-lang/rust/pull/50656
177 [50812]: https://github.com/rust-lang/rust/pull/50812
178 [50950]: https://github.com/rust-lang/rust/issues/50950
179 [rustfmt/2695]: https://github.com/rust-lang-nursery/rustfmt/issues/2695
181 Version 1.26.0 (2018-05-10)
182 ==========================
186 - [Closures now implement `Copy` and/or `Clone` if all captured variables
187 implement either or both traits.][49299]
188 - [The inclusive range syntax e.g. `for x in 0..=10` is now stable.][47813]
189 - [Stablise `'_`. The underscore lifetime can be used anywhere where a
190 lifetime can be elided.][49458]
191 - [`impl Trait` is now stable allowing you to have abstract types in returns
192 or in function parameters.][49255] e.g. `fn foo() -> impl Iterator<Item=u8>` or
193 `fn open(path: impl AsRef<Path>)`.
194 - [Pattern matching will now automatically apply dereferences.][49394]
195 - [128-bit integers in the form of `u128` and `i128` are now stable.][49101]
196 - [`main` can now return `Result<(), E: Debug>`][49162] in addition to `()`.
197 - [A lot of operations are now available in a const context.][46882] E.g. You
198 can now index into constant arrays, reference and dereference into constants,
199 and use Tuple struct constructors.
200 - [Fixed entry slice patterns are now stable.][48516] e.g.
202 let points = [1, 2, 3, 4];
204 [1, 2, 3, 4] => println!("All points were sequential."),
205 _ => println!("Not all points were sequential."),
212 - [LLD is now used as the default linker for `wasm32-unknown-unknown`.][48125]
213 - [Fixed exponential projection complexity on nested types.][48296]
214 This can provide up to a ~12% reduction in compile times for certain crates.
215 - [Added the `--remap-path-prefix` option to rustc.][48359] Allowing you
216 to remap path prefixes outputted by the compiler.
217 - [Added `powerpc-unknown-netbsd` target.][48281]
221 - [Implemented `From<u16> for usize` & `From<{u8, i16}> for isize`.][49305]
222 - [Added hexadecimal formatting for integers with fmt::Debug][48978]
223 e.g. `assert!(format!("{:02x?}", b"Foo\0") == "[46, 6f, 6f, 00]")`
224 - [Implemented `Default, Hash` for `cmp::Reverse`.][48628]
225 - [Optimized `str::repeat` being 8x faster in large cases.][48657]
226 - [`ascii::escape_default` is now available in libcore.][48735]
227 - [Trailing commas are now supported in std and core macros.][48056]
228 - [Implemented `Copy, Clone` for `cmp::Reverse`][47379]
229 - [Implemented `Clone` for `char::{ToLowercase, ToUppercase}`.][48629]
234 - [`*const T::copy_to_nonoverlapping`]
235 - [`*const T::copy_to`]
236 - [`*const T::read_unaligned`]
237 - [`*const T::read_volatile`]
240 - [`*const T::wrapping_add`]
241 - [`*const T::wrapping_sub`]
243 - [`*mut T::copy_to_nonoverlapping`]
244 - [`*mut T::copy_to`]
245 - [`*mut T::read_unaligned`]
246 - [`*mut T::read_volatile`]
248 - [`*mut T::replace`]
251 - [`*mut T::wrapping_add`]
252 - [`*mut T::wrapping_sub`]
253 - [`*mut T::write_bytes`]
254 - [`*mut T::write_unaligned`]
255 - [`*mut T::write_volatile`]
258 - [`FromUtf8Error::as_bytes`]
259 - [`LocalKey::try_with`]
261 - [`btree_map::Entry::and_modify`]
262 - [`fs::read_to_string`]
265 - [`hash_map::Entry::and_modify`]
266 - [`iter::FusedIterator`]
267 - [`ops::RangeInclusive`]
268 - [`ops::RangeToInclusive`]
270 - [`slice::rotate_left`]
271 - [`slice::rotate_right`]
277 - [Cargo will now output path to custom commands when `-v` is
278 passed with `--list`][cargo/5041]
279 - [The Cargo binary version is now the same as the Rust version][cargo/5083]
283 - [The second edition of "The Rust Programming Language" book is now recommended
284 over the first.][48404]
289 - [aliasing a `Fn` trait as `dyn` no longer works.][48481] E.g. the following
290 syntax is now invalid.
292 use std::ops::Fn as dyn;
293 fn g(_: Box<dyn(std::fmt::Debug)>) {}
295 - [The result of dereferences are no longer promoted to `'static`.][47408]
299 const PAIR: &(i32, i32) = &(0, 1);
300 let _reversed_pair: &'static _ = &(PAIR.1, PAIR.0); // Doesn't work
303 - [Deprecate `AsciiExt` trait in favor of inherent methods.][49109]
304 - [`".e0"` will now no longer parse as `0.0` and will instead cause
306 - [Removed hoedown from rustdoc.][48274]
307 - [Bounds on higher-kinded lifetimes a hard error.][48326]
309 [46882]: https://github.com/rust-lang/rust/pull/46882
310 [47379]: https://github.com/rust-lang/rust/pull/47379
311 [47408]: https://github.com/rust-lang/rust/pull/47408
312 [47813]: https://github.com/rust-lang/rust/pull/47813
313 [48056]: https://github.com/rust-lang/rust/pull/48056
314 [48125]: https://github.com/rust-lang/rust/pull/48125
315 [48166]: https://github.com/rust-lang/rust/pull/48166
316 [48235]: https://github.com/rust-lang/rust/pull/48235
317 [48274]: https://github.com/rust-lang/rust/pull/48274
318 [48281]: https://github.com/rust-lang/rust/pull/48281
319 [48296]: https://github.com/rust-lang/rust/pull/48296
320 [48326]: https://github.com/rust-lang/rust/pull/48326
321 [48359]: https://github.com/rust-lang/rust/pull/48359
322 [48404]: https://github.com/rust-lang/rust/pull/48404
323 [48481]: https://github.com/rust-lang/rust/pull/48481
324 [48516]: https://github.com/rust-lang/rust/pull/48516
325 [48628]: https://github.com/rust-lang/rust/pull/48628
326 [48629]: https://github.com/rust-lang/rust/pull/48629
327 [48657]: https://github.com/rust-lang/rust/pull/48657
328 [48735]: https://github.com/rust-lang/rust/pull/48735
329 [48978]: https://github.com/rust-lang/rust/pull/48978
330 [49101]: https://github.com/rust-lang/rust/pull/49101
331 [49109]: https://github.com/rust-lang/rust/pull/49109
332 [49121]: https://github.com/rust-lang/rust/pull/49121
333 [49162]: https://github.com/rust-lang/rust/pull/49162
334 [49184]: https://github.com/rust-lang/rust/pull/49184
335 [49234]: https://github.com/rust-lang/rust/pull/49234
336 [49255]: https://github.com/rust-lang/rust/pull/49255
337 [49299]: https://github.com/rust-lang/rust/pull/49299
338 [49305]: https://github.com/rust-lang/rust/pull/49305
339 [49394]: https://github.com/rust-lang/rust/pull/49394
340 [49458]: https://github.com/rust-lang/rust/pull/49458
341 [`*const T::add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.add
342 [`*const T::copy_to_nonoverlapping`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to_nonoverlapping
343 [`*const T::copy_to`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to
344 [`*const T::read_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_unaligned
345 [`*const T::read_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_volatile
346 [`*const T::read`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read
347 [`*const T::sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.sub
348 [`*const T::wrapping_add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_add
349 [`*const T::wrapping_sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_sub
350 [`*mut T::add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.add-1
351 [`*mut T::copy_to_nonoverlapping`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to_nonoverlapping-1
352 [`*mut T::copy_to`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to-1
353 [`*mut T::read_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_unaligned-1
354 [`*mut T::read_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_volatile-1
355 [`*mut T::read`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read-1
356 [`*mut T::replace`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.replace
357 [`*mut T::sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.sub-1
358 [`*mut T::swap`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.swap
359 [`*mut T::wrapping_add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_add-1
360 [`*mut T::wrapping_sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_sub-1
361 [`*mut T::write_bytes`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_bytes
362 [`*mut T::write_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_unaligned
363 [`*mut T::write_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_volatile
364 [`*mut T::write`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write
365 [`Box::leak`]: https://doc.rust-lang.org/std/boxed/struct.Box.html#method.leak
366 [`FromUtf8Error::as_bytes`]: https://doc.rust-lang.org/std/string/struct.FromUtf8Error.html#method.as_bytes
367 [`LocalKey::try_with`]: https://doc.rust-lang.org/std/thread/struct.LocalKey.html#method.try_with
368 [`Option::cloned`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.cloned
369 [`btree_map::Entry::and_modify`]: https://doc.rust-lang.org/std/collections/btree_map/enum.Entry.html#method.and_modify
370 [`fs::read_to_string`]: https://doc.rust-lang.org/std/fs/fn.read_to_string.html
371 [`fs::read`]: https://doc.rust-lang.org/std/fs/fn.read.html
372 [`fs::write`]: https://doc.rust-lang.org/std/fs/fn.write.html
373 [`hash_map::Entry::and_modify`]: https://doc.rust-lang.org/std/collections/hash_map/enum.Entry.html#method.and_modify
374 [`iter::FusedIterator`]: https://doc.rust-lang.org/std/iter/trait.FusedIterator.html
375 [`ops::RangeInclusive`]: https://doc.rust-lang.org/std/ops/struct.RangeInclusive.html
376 [`ops::RangeToInclusive`]: https://doc.rust-lang.org/std/ops/struct.RangeToInclusive.html
377 [`process::id`]: https://doc.rust-lang.org/std/process/fn.id.html
378 [`slice::rotate_left`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rotate_left
379 [`slice::rotate_right`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rotate_right
380 [`String::retain`]: https://doc.rust-lang.org/std/string/struct.String.html#method.retain
381 [cargo/5041]: https://github.com/rust-lang/cargo/pull/5041
382 [cargo/5083]: https://github.com/rust-lang/cargo/pull/5083
385 Version 1.25.0 (2018-03-29)
386 ==========================
390 - [Stabilised `#[repr(align(x))]`.][47006] [RFC 1358]
391 - [You can now use nested groups of imports.][47948]
392 e.g. `use std::{fs::File, io::Read, path::{Path, PathBuf}};`
393 - [You can now have `|` at the start of a match arm.][47947] e.g.
401 | Foo::B => println!("AB"),
402 | Foo::C => println!("C"),
409 - [Upgraded to LLVM 6.][47828]
410 - [Added `-C lto=val` option.][47521]
411 - [Added `i586-unknown-linux-musl` target][47282]
415 - [Impl Send for `process::Command` on Unix.][47760]
416 - [Impl PartialEq and Eq for `ParseCharError`.][47790]
417 - [`UnsafeCell::into_inner` is now safe.][47204]
418 - [Implement libstd for CloudABI.][47268]
419 - [`Float::{from_bits, to_bits}` is now available in libcore.][46931]
420 - [Implement `AsRef<Path>` for Component][46985]
421 - [Implemented `Write` for `Cursor<&mut Vec<u8>>`][46830]
422 - [Moved `Duration` to libcore.][46666]
426 - [`Location::column`]
429 The following functions can now be used in a constant expression.
430 eg. `static MINUTE: Duration = Duration::from_secs(60);`
431 - [`Duration::new`][47300]
432 - [`Duration::from_secs`][47300]
433 - [`Duration::from_millis`][47300]
437 - [`cargo new` no longer removes `rust` or `rs` prefixs/suffixs.][cargo/5013]
438 - [`cargo new` now defaults to creating a binary crate, instead of a
439 library crate.][cargo/5029]
443 - [Rust by example is now shipped with new releases][46196]
447 - [Deprecated `net::lookup_host`.][47510]
448 - [`rustdoc` has switched to pulldown as the default markdown renderer.][47398]
449 - The borrow checker was sometimes incorrectly permitting overlapping borrows
450 around indexing operations (see [#47349][47349]). This has been fixed (which also
451 enabled some correct code that used to cause errors (e.g. [#33903][33903] and [#46095][46095]).
452 - [Removed deprecated unstable attribute `#[simd]`.][47251]
454 [33903]: https://github.com/rust-lang/rust/pull/33903
455 [47947]: https://github.com/rust-lang/rust/pull/47947
456 [47948]: https://github.com/rust-lang/rust/pull/47948
457 [47760]: https://github.com/rust-lang/rust/pull/47760
458 [47790]: https://github.com/rust-lang/rust/pull/47790
459 [47828]: https://github.com/rust-lang/rust/pull/47828
460 [47398]: https://github.com/rust-lang/rust/pull/47398
461 [47510]: https://github.com/rust-lang/rust/pull/47510
462 [47521]: https://github.com/rust-lang/rust/pull/47521
463 [47204]: https://github.com/rust-lang/rust/pull/47204
464 [47251]: https://github.com/rust-lang/rust/pull/47251
465 [47268]: https://github.com/rust-lang/rust/pull/47268
466 [47282]: https://github.com/rust-lang/rust/pull/47282
467 [47300]: https://github.com/rust-lang/rust/pull/47300
468 [47349]: https://github.com/rust-lang/rust/pull/47349
469 [46931]: https://github.com/rust-lang/rust/pull/46931
470 [46985]: https://github.com/rust-lang/rust/pull/46985
471 [47006]: https://github.com/rust-lang/rust/pull/47006
472 [46830]: https://github.com/rust-lang/rust/pull/46830
473 [46095]: https://github.com/rust-lang/rust/pull/46095
474 [46666]: https://github.com/rust-lang/rust/pull/46666
475 [46196]: https://github.com/rust-lang/rust/pull/46196
476 [cargo/5013]: https://github.com/rust-lang/cargo/pull/5013
477 [cargo/5029]: https://github.com/rust-lang/cargo/pull/5029
478 [RFC 1358]: https://github.com/rust-lang/rfcs/pull/1358
479 [`Location::column`]: https://doc.rust-lang.org/std/panic/struct.Location.html#method.column
480 [`ptr::NonNull`]: https://doc.rust-lang.org/std/ptr/struct.NonNull.html
483 Version 1.24.1 (2018-03-01)
484 ==========================
486 - [Do not abort when unwinding through FFI][48251]
487 - [Emit UTF-16 files for linker arguments on Windows][48318]
488 - [Make the error index generator work again][48308]
489 - [Cargo will warn on Windows 7 if an update is needed][cargo/5069].
491 [48251]: https://github.com/rust-lang/rust/issues/48251
492 [48308]: https://github.com/rust-lang/rust/issues/48308
493 [48318]: https://github.com/rust-lang/rust/issues/48318
494 [cargo/5069]: https://github.com/rust-lang/cargo/pull/5069
497 Version 1.24.0 (2018-02-15)
498 ==========================
502 - [External `sysv64` ffi is now available.][46528]
503 eg. `extern "sysv64" fn foo () {}`
507 - [rustc now uses 16 codegen units by default for release builds.][46910]
508 For the fastest builds, utilize `codegen-units=1`.
509 - [Added `armv4t-unknown-linux-gnueabi` target.][47018]
510 - [Add `aarch64-unknown-openbsd` support][46760]
514 - [`str::find::<char>` now uses memchr.][46735] This should lead to a 10x
515 improvement in performance in the majority of cases.
516 - [`OsStr`'s `Debug` implementation is now lossless and consistent
517 with Windows.][46798]
518 - [`time::{SystemTime, Instant}` now implement `Hash`.][46828]
519 - [impl `From<bool>` for `AtomicBool`][46293]
520 - [impl `From<{CString, &CStr}>` for `{Arc<CStr>, Rc<CStr>}`][45990]
521 - [impl `From<{OsString, &OsStr}>` for `{Arc<OsStr>, Rc<OsStr>}`][45990]
522 - [impl `From<{PathBuf, &Path}>` for `{Arc<Path>, Rc<Path>}`][45990]
523 - [float::from_bits now just uses transmute.][46012] This provides
524 some optimisations from LLVM.
525 - [Copied `AsciiExt` methods onto `char`][46077]
526 - [Remove `T: Sized` requirement on `ptr::is_null()`][46094]
527 - [impl `From<RecvError>` for `{TryRecvError, RecvTimeoutError}`][45506]
528 - [Optimised `f32::{min, max}` to generate more efficient x86 assembly][47080]
529 - [`[u8]::contains` now uses memchr which provides a 3x speed improvement][46713]
533 - [`RefCell::replace`]
535 - [`atomic::spin_loop_hint`]
537 The following functions can now be used in a constant expression.
538 eg. `let buffer: [u8; size_of::<usize>()];`, `static COUNTER: AtomicUsize = AtomicUsize::new(1);`
540 - [`AtomicBool::new`][46287]
541 - [`AtomicUsize::new`][46287]
542 - [`AtomicIsize::new`][46287]
543 - [`AtomicPtr::new`][46287]
544 - [`Cell::new`][46287]
545 - [`{integer}::min_value`][46287]
546 - [`{integer}::max_value`][46287]
547 - [`mem::size_of`][46287]
548 - [`mem::align_of`][46287]
549 - [`ptr::null`][46287]
550 - [`ptr::null_mut`][46287]
551 - [`RefCell::new`][46287]
552 - [`UnsafeCell::new`][46287]
556 - [Added a `workspace.default-members` config that
557 overrides implied `--all` in virtual workspaces.][cargo/4743]
558 - [Enable incremental by default on development builds.][cargo/4817] Also added
559 configuration keys to `Cargo.toml` and `.cargo/config` to disable on a
560 per-project or global basis respectively.
567 - [Floating point types `Debug` impl now always prints a decimal point.][46831]
568 - [`Ipv6Addr` now rejects superfluous `::`'s in IPv6 addresses][46671] This is
569 in accordance with IETF RFC 4291 §2.2.
570 - [Unwinding will no longer go past FFI boundaries, and will instead abort.][46833]
571 - [`Formatter::flags` method is now deprecated.][46284] The `sign_plus`,
572 `sign_minus`, `alternate`, and `sign_aware_zero_pad` should be used instead.
573 - [Leading zeros in tuple struct members is now an error][47084]
574 - [`column!()` macro is one-based instead of zero-based][46977]
575 - [`fmt::Arguments` can no longer be shared across threads][45198]
576 - [Access to `#[repr(packed)]` struct fields is now unsafe][44884]
577 - [Cargo sets a different working directory for the compiler][cargo/4788]
579 [44884]: https://github.com/rust-lang/rust/pull/44884
580 [45198]: https://github.com/rust-lang/rust/pull/45198
581 [45506]: https://github.com/rust-lang/rust/pull/45506
582 [45904]: https://github.com/rust-lang/rust/pull/45904
583 [45990]: https://github.com/rust-lang/rust/pull/45990
584 [46012]: https://github.com/rust-lang/rust/pull/46012
585 [46077]: https://github.com/rust-lang/rust/pull/46077
586 [46094]: https://github.com/rust-lang/rust/pull/46094
587 [46284]: https://github.com/rust-lang/rust/pull/46284
588 [46287]: https://github.com/rust-lang/rust/pull/46287
589 [46293]: https://github.com/rust-lang/rust/pull/46293
590 [46528]: https://github.com/rust-lang/rust/pull/46528
591 [46671]: https://github.com/rust-lang/rust/pull/46671
592 [46713]: https://github.com/rust-lang/rust/pull/46713
593 [46735]: https://github.com/rust-lang/rust/pull/46735
594 [46749]: https://github.com/rust-lang/rust/pull/46749
595 [46760]: https://github.com/rust-lang/rust/pull/46760
596 [46798]: https://github.com/rust-lang/rust/pull/46798
597 [46828]: https://github.com/rust-lang/rust/pull/46828
598 [46831]: https://github.com/rust-lang/rust/pull/46831
599 [46833]: https://github.com/rust-lang/rust/pull/46833
600 [46910]: https://github.com/rust-lang/rust/pull/46910
601 [46977]: https://github.com/rust-lang/rust/pull/46977
602 [47018]: https://github.com/rust-lang/rust/pull/47018
603 [47080]: https://github.com/rust-lang/rust/pull/47080
604 [47084]: https://github.com/rust-lang/rust/pull/47084
605 [cargo/4743]: https://github.com/rust-lang/cargo/pull/4743
606 [cargo/4788]: https://github.com/rust-lang/cargo/pull/4788
607 [cargo/4817]: https://github.com/rust-lang/cargo/pull/4817
608 [`RefCell::replace`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.replace
609 [`RefCell::swap`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.swap
610 [`atomic::spin_loop_hint`]: https://doc.rust-lang.org/std/sync/atomic/fn.spin_loop_hint.html
613 Version 1.23.0 (2018-01-04)
614 ==========================
618 - [Arbitrary `auto` traits are now permitted in trait objects.][45772]
619 - [rustc now uses subtyping on the left hand side of binary operations.][45435]
620 Which should fix some confusing errors in some operations.
624 - [Enabled `TrapUnreachable` in LLVM which should mitigate the impact of
625 undefined behaviour.][45920]
626 - [rustc now suggests renaming import if names clash.][45660]
627 - [Display errors/warnings correctly when there are zero-width or
628 wide characters.][45711]
629 - [rustc now avoids unnecessary copies of arguments that are
630 simple bindings][45380] This should improve memory usage on average by 5-10%.
631 - [Updated musl used to build musl rustc to 1.1.17][45393]
635 - [Allow a trailing comma in `assert_eq/ne` macro][45887]
636 - [Implement Hash for raw pointers to unsized types][45483]
637 - [impl `From<*mut T>` for `AtomicPtr<T>`][45610]
638 - [impl `From<usize/isize>` for `AtomicUsize/AtomicIsize`.][45610]
639 - [Removed the `T: Sync` requirement for `RwLock<T>: Send`][45267]
640 - [Removed `T: Sized` requirement for `{<*const T>, <*mut T>}::as_ref`
641 and `<*mut T>::as_mut`][44932]
642 - [Optimized `Thread::{park, unpark}` implementation][45524]
643 - [Improved `SliceExt::binary_search` performance.][45333]
644 - [impl `FromIterator<()>` for `()`][45379]
645 - [Copied `AsciiExt` trait methods to primitive types.][44042] Use of `AsciiExt`
653 - [Cargo now supports uninstallation of multiple packages][cargo/4561]
654 eg. `cargo uninstall foo bar` uninstalls `foo` and `bar`.
655 - [Added unit test checking to `cargo check`][cargo/4592]
656 - [Cargo now lets you install a specific version
657 using `cargo install --version`][cargo/4637]
661 - [Releases now ship with the Cargo book documentation.][45692]
662 - [rustdoc now prints rendering warnings on every run.][45324]
666 - [Changes have been made to type equality to make it more correct,
667 in rare cases this could break some code.][45853] [Tracking issue for
668 further information][45852]
669 - [`char::escape_debug` now uses Unicode 10 over 9.][45571]
670 - [Upgraded Android SDK to 27, and NDK to r15c.][45580] This drops support for
671 Android 9, the minimum supported version is Android 14.
672 - [Bumped the minimum LLVM to 3.9][45326]
674 [44042]: https://github.com/rust-lang/rust/pull/44042
675 [44932]: https://github.com/rust-lang/rust/pull/44932
676 [45267]: https://github.com/rust-lang/rust/pull/45267
677 [45324]: https://github.com/rust-lang/rust/pull/45324
678 [45326]: https://github.com/rust-lang/rust/pull/45326
679 [45333]: https://github.com/rust-lang/rust/pull/45333
680 [45379]: https://github.com/rust-lang/rust/pull/45379
681 [45380]: https://github.com/rust-lang/rust/pull/45380
682 [45393]: https://github.com/rust-lang/rust/pull/45393
683 [45435]: https://github.com/rust-lang/rust/pull/45435
684 [45483]: https://github.com/rust-lang/rust/pull/45483
685 [45524]: https://github.com/rust-lang/rust/pull/45524
686 [45571]: https://github.com/rust-lang/rust/pull/45571
687 [45580]: https://github.com/rust-lang/rust/pull/45580
688 [45610]: https://github.com/rust-lang/rust/pull/45610
689 [45660]: https://github.com/rust-lang/rust/pull/45660
690 [45692]: https://github.com/rust-lang/rust/pull/45692
691 [45711]: https://github.com/rust-lang/rust/pull/45711
692 [45772]: https://github.com/rust-lang/rust/pull/45772
693 [45852]: https://github.com/rust-lang/rust/issues/45852
694 [45853]: https://github.com/rust-lang/rust/pull/45853
695 [45887]: https://github.com/rust-lang/rust/pull/45887
696 [45920]: https://github.com/rust-lang/rust/pull/45920
697 [cargo/4561]: https://github.com/rust-lang/cargo/pull/4561
698 [cargo/4592]: https://github.com/rust-lang/cargo/pull/4592
699 [cargo/4637]: https://github.com/rust-lang/cargo/pull/4637
702 Version 1.22.1 (2017-11-22)
703 ==========================
705 - [Update Cargo to fix an issue with macOS 10.13 "High Sierra"][46183]
707 [46183]: https://github.com/rust-lang/rust/pull/46183
709 Version 1.22.0 (2017-11-22)
710 ==========================
714 - [`non_snake_case` lint now allows extern no-mangle functions][44966]
715 - [Now accepts underscores in unicode escapes][43716]
716 - [`T op= &T` now works for numeric types.][44287] eg. `let mut x = 2; x += &8;`
717 - [types that impl `Drop` are now allowed in `const` and `static` types][44456]
721 - [rustc now defaults to having 16 codegen units at debug on supported platforms.][45064]
722 - [rustc will no longer inline in codegen units when compiling for debug][45075]
723 This should decrease compile times for debug builds.
724 - [strict memory alignment now enabled on ARMv6][45094]
725 - [Remove support for the PNaCl target `le32-unknown-nacl`][45041]
729 - [Allow atomic operations up to 32 bits
730 on `armv5te_unknown_linux_gnueabi`][44978]
731 - [`Box<Error>` now impls `From<Cow<str>>`][44466]
732 - [`std::mem::Discriminant` is now guaranteed to be `Send + Sync`][45095]
733 - [`fs::copy` now returns the length of the main stream on NTFS.][44895]
734 - [Properly detect overflow in `Instant += Duration`.][44220]
735 - [impl `Hasher` for `{&mut Hasher, Box<Hasher>}`][44015]
736 - [impl `fmt::Debug` for `SplitWhitespace`.][44303]
737 - [`Option<T>` now impls `Try`][42526] This allows for using `?` with `Option` types.
744 - [Cargo will now build multi file examples in subdirectories of the `examples`
745 folder that have a `main.rs` file.][cargo/4496]
746 - [Changed `[root]` to `[package]` in `Cargo.lock`][cargo/4571] Packages with
747 the old format will continue to work and can be updated with `cargo update`.
748 - [Now supports vendoring git repositories][cargo/3992]
752 - [`libbacktrace` is now available on Apple platforms.][44251]
753 - [Stabilised the `compile_fail` attribute for code fences in doc-comments.][43949]
754 This now lets you specify that a given code example will fail to compile.
758 - [The minimum Android version that rustc can build for has been bumped
759 to `4.0` from `2.3`][45656]
760 - [Allowing `T op= &T` for numeric types has broken some type
761 inference cases][45480]
764 [42526]: https://github.com/rust-lang/rust/pull/42526
765 [43017]: https://github.com/rust-lang/rust/pull/43017
766 [43716]: https://github.com/rust-lang/rust/pull/43716
767 [43949]: https://github.com/rust-lang/rust/pull/43949
768 [44015]: https://github.com/rust-lang/rust/pull/44015
769 [44220]: https://github.com/rust-lang/rust/pull/44220
770 [44251]: https://github.com/rust-lang/rust/pull/44251
771 [44287]: https://github.com/rust-lang/rust/pull/44287
772 [44303]: https://github.com/rust-lang/rust/pull/44303
773 [44456]: https://github.com/rust-lang/rust/pull/44456
774 [44466]: https://github.com/rust-lang/rust/pull/44466
775 [44895]: https://github.com/rust-lang/rust/pull/44895
776 [44966]: https://github.com/rust-lang/rust/pull/44966
777 [44978]: https://github.com/rust-lang/rust/pull/44978
778 [45041]: https://github.com/rust-lang/rust/pull/45041
779 [45064]: https://github.com/rust-lang/rust/pull/45064
780 [45075]: https://github.com/rust-lang/rust/pull/45075
781 [45094]: https://github.com/rust-lang/rust/pull/45094
782 [45095]: https://github.com/rust-lang/rust/pull/45095
783 [45480]: https://github.com/rust-lang/rust/issues/45480
784 [45656]: https://github.com/rust-lang/rust/pull/45656
785 [cargo/3992]: https://github.com/rust-lang/cargo/pull/3992
786 [cargo/4496]: https://github.com/rust-lang/cargo/pull/4496
787 [cargo/4571]: https://github.com/rust-lang/cargo/pull/4571
794 Version 1.21.0 (2017-10-12)
795 ==========================
799 - [You can now use static references for literals.][43838]
803 let x: &'static u32 = &0;
806 - [Relaxed path syntax. Optional `::` before `<` is now allowed in all contexts.][43540]
809 my_macro!(Vec<i32>::new); // Always worked
810 my_macro!(Vec::<i32>::new); // Now works
815 - [Upgraded jemalloc to 4.5.0][43911]
816 - [Enabled unwinding panics on Redox][43917]
817 - [Now runs LLVM in parallel during translation phase.][43506]
818 This should reduce peak memory usage.
822 - [Generate builtin impls for `Clone` for all arrays and tuples that
823 are `T: Clone`][43690]
824 - [`Stdin`, `Stdout`, and `Stderr` now implement `AsRawFd`.][43459]
825 - [`Rc` and `Arc` now implement `From<&[T]> where T: Clone`, `From<str>`,
826 `From<String>`, `From<Box<T>> where T: ?Sized`, and `From<Vec<T>>`.][42565]
831 [`std::mem::discriminant`]
835 - [You can now call `cargo install` with multiple package names][cargo/4216]
836 - [Cargo commands inside a virtual workspace will now implicitly
837 pass `--all`][cargo/4335]
838 - [Added a `[patch]` section to `Cargo.toml` to handle
839 prepublication dependencies][cargo/4123] [RFC 1969]
840 - [`include` & `exclude` fields in `Cargo.toml` now accept gitignore
841 like patterns][cargo/4270]
842 - [Added the `--all-targets` option][cargo/4400]
843 - [Using required dependencies as a feature is now deprecated and emits
844 a warning][cargo/4364]
849 - [Cargo docs are moving][43916]
850 to [doc.rust-lang.org/cargo](https://doc.rust-lang.org/cargo)
851 - [The rustdoc book is now available][43863]
852 at [doc.rust-lang.org/rustdoc](https://doc.rust-lang.org/rustdoc)
853 - [Added a preview of RLS has been made available through rustup][44204]
854 Install with `rustup component add rls-preview`
855 - [`std::os` documentation for Unix, Linux, and Windows now appears on doc.rust-lang.org][43348]
856 Previously only showed `std::os::unix`.
860 - [Changes in method matching against higher-ranked types][43880] This may cause
861 breakage in subtyping corner cases. [A more in-depth explanation is available.][info/43880]
862 - [rustc's JSON error output's byte position start at top of file.][42973]
863 Was previously relative to the rustc's internal `CodeMap` struct which
864 required the unstable library `libsyntax` to correctly use.
865 - [`unused_results` lint no longer ignores booleans][43728]
867 [42565]: https://github.com/rust-lang/rust/pull/42565
868 [42973]: https://github.com/rust-lang/rust/pull/42973
869 [43348]: https://github.com/rust-lang/rust/pull/43348
870 [43459]: https://github.com/rust-lang/rust/pull/43459
871 [43506]: https://github.com/rust-lang/rust/pull/43506
872 [43540]: https://github.com/rust-lang/rust/pull/43540
873 [43690]: https://github.com/rust-lang/rust/pull/43690
874 [43728]: https://github.com/rust-lang/rust/pull/43728
875 [43838]: https://github.com/rust-lang/rust/pull/43838
876 [43863]: https://github.com/rust-lang/rust/pull/43863
877 [43880]: https://github.com/rust-lang/rust/pull/43880
878 [43911]: https://github.com/rust-lang/rust/pull/43911
879 [43916]: https://github.com/rust-lang/rust/pull/43916
880 [43917]: https://github.com/rust-lang/rust/pull/43917
881 [44204]: https://github.com/rust-lang/rust/pull/44204
882 [cargo/4123]: https://github.com/rust-lang/cargo/pull/4123
883 [cargo/4216]: https://github.com/rust-lang/cargo/pull/4216
884 [cargo/4270]: https://github.com/rust-lang/cargo/pull/4270
885 [cargo/4335]: https://github.com/rust-lang/cargo/pull/4335
886 [cargo/4364]: https://github.com/rust-lang/cargo/pull/4364
887 [cargo/4400]: https://github.com/rust-lang/cargo/pull/4400
888 [RFC 1969]: https://github.com/rust-lang/rfcs/pull/1969
889 [info/43880]: https://github.com/rust-lang/rust/issues/44224#issuecomment-330058902
890 [`std::mem::discriminant`]: https://doc.rust-lang.org/std/mem/fn.discriminant.html
892 Version 1.20.0 (2017-08-31)
893 ===========================
897 - [Associated constants are now stabilised.][42809]
898 - [A lot of macro bugs are now fixed.][42913]
903 - [Struct fields are now properly coerced to the expected field type.][42807]
904 - [Enabled wasm LLVM backend][42571] WASM can now be built with the
905 `wasm32-experimental-emscripten` target.
906 - [Changed some of the error messages to be more helpful.][42033]
907 - [Add support for RELRO(RELocation Read-Only) for platforms that support
909 - [rustc now reports the total number of errors on compilation failure][43015]
910 previously this was only the number of errors in the pass that failed.
911 - [Expansion in rustc has been sped up 29x.][42533]
912 - [added `msp430-none-elf` target.][43099]
913 - [rustc will now suggest one-argument enum variant to fix type mismatch when
915 - [Fixes backtraces on Redox][43228]
916 - [rustc now identifies different versions of same crate when absolute paths of
917 different types match in an error message.][42826]
923 - [Relaxed Debug constraints on `{HashMap,BTreeMap}::{Keys,Values}`.][42854]
924 - [Impl `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Debug`, `Hash` for unsized
926 - [Impl `fmt::{Display, Debug}` for `Ref`, `RefMut`, `MutexGuard`,
927 `RwLockReadGuard`, `RwLockWriteGuard`][42822]
928 - [Impl `Clone` for `DefaultHasher`.][42799]
929 - [Impl `Sync` for `SyncSender`.][42397]
930 - [Impl `FromStr` for `char`][42271]
931 - [Fixed how `{f32, f64}::{is_sign_negative, is_sign_positive}` handles
933 - [allow messages in the `unimplemented!()` macro.][42155]
934 ie. `unimplemented!("Waiting for 1.21 to be stable")`
935 - [`pub(restricted)` is now supported in the `thread_local!` macro.][43185]
936 - [Upgrade to Unicode 10.0.0][42999]
937 - [Reimplemented `{f32, f64}::{min, max}` in Rust instead of using CMath.][42430]
938 - [Skip the main thread's manual stack guard on Linux][43072]
939 - [Iterator::nth for `ops::{Range, RangeFrom}` is now done in O(1) time][43077]
940 - [`#[repr(align(N))]` attribute max number is now 2^31 - 1.][43097] This was
942 - [`{OsStr, Path}::Display` now avoids allocations where possible][42613]
947 - [`CStr::into_c_string`]
948 - [`CString::as_c_str`]
949 - [`CString::into_boxed_c_str`]
952 - [`Chain::into_inner`]
953 - [`Option::get_or_insert_with`]
954 - [`Option::get_or_insert`]
955 - [`OsStr::into_os_string`]
956 - [`OsString::into_boxed_os_str`]
959 - [`Utf8Error::error_len`]
960 - [`char::EscapeDebug`]
961 - [`char::escape_debug`]
967 - [`mem::ManuallyDrop`]
968 - [`slice::sort_unstable_by_key`]
969 - [`slice::sort_unstable_by`]
970 - [`slice::sort_unstable`]
971 - [`str::from_boxed_utf8_unchecked`]
972 - [`str::as_bytes_mut`]
973 - [`str::as_bytes_mut`]
974 - [`str::from_utf8_mut`]
975 - [`str::from_utf8_unchecked_mut`]
977 - [`str::get_unchecked_mut`]
978 - [`str::get_unchecked`]
980 - [`str::into_boxed_bytes`]
985 - [Cargo API token location moved from `~/.cargo/config` to
986 `~/.cargo/credentials`.][cargo/3978]
987 - [Cargo will now build `main.rs` binaries that are in sub-directories of
988 `src/bin`.][cargo/4214] ie. Having `src/bin/server/main.rs` and
989 `src/bin/client/main.rs` generates `target/debug/server` and `target/debug/client`
990 - [You can now specify version of a binary when installed through
991 `cargo install` using `--vers`.][cargo/4229]
992 - [Added `--no-fail-fast` flag to cargo to run all benchmarks regardless of
993 failure.][cargo/4248]
994 - [Changed the convention around which file is the crate root.][cargo/4259]
995 - [The `include`/`exclude` property in `Cargo.toml` now accepts gitignore paths
996 instead of glob patterns][cargo/4270]. Glob patterns are now deprecated.
1001 - [Functions with `'static` in their return types will now not be as usable as
1002 if they were using lifetime parameters instead.][42417]
1003 - [The reimplementation of `{f32, f64}::is_sign_{negative, positive}` now
1004 takes the sign of NaN into account where previously didn't.][42430]
1006 [42033]: https://github.com/rust-lang/rust/pull/42033
1007 [42155]: https://github.com/rust-lang/rust/pull/42155
1008 [42271]: https://github.com/rust-lang/rust/pull/42271
1009 [42397]: https://github.com/rust-lang/rust/pull/42397
1010 [42417]: https://github.com/rust-lang/rust/pull/42417
1011 [42430]: https://github.com/rust-lang/rust/pull/42430
1012 [42431]: https://github.com/rust-lang/rust/pull/42431
1013 [42533]: https://github.com/rust-lang/rust/pull/42533
1014 [42571]: https://github.com/rust-lang/rust/pull/42571
1015 [42613]: https://github.com/rust-lang/rust/pull/42613
1016 [42799]: https://github.com/rust-lang/rust/pull/42799
1017 [42807]: https://github.com/rust-lang/rust/pull/42807
1018 [42809]: https://github.com/rust-lang/rust/pull/42809
1019 [42822]: https://github.com/rust-lang/rust/pull/42822
1020 [42826]: https://github.com/rust-lang/rust/pull/42826
1021 [42854]: https://github.com/rust-lang/rust/pull/42854
1022 [42913]: https://github.com/rust-lang/rust/pull/42913
1023 [42999]: https://github.com/rust-lang/rust/pull/42999
1024 [43011]: https://github.com/rust-lang/rust/pull/43011
1025 [43015]: https://github.com/rust-lang/rust/pull/43015
1026 [43072]: https://github.com/rust-lang/rust/pull/43072
1027 [43077]: https://github.com/rust-lang/rust/pull/43077
1028 [43097]: https://github.com/rust-lang/rust/pull/43097
1029 [43099]: https://github.com/rust-lang/rust/pull/43099
1030 [43170]: https://github.com/rust-lang/rust/pull/43170
1031 [43178]: https://github.com/rust-lang/rust/pull/43178
1032 [43185]: https://github.com/rust-lang/rust/pull/43185
1033 [43228]: https://github.com/rust-lang/rust/pull/43228
1034 [cargo/3978]: https://github.com/rust-lang/cargo/pull/3978
1035 [cargo/4214]: https://github.com/rust-lang/cargo/pull/4214
1036 [cargo/4229]: https://github.com/rust-lang/cargo/pull/4229
1037 [cargo/4248]: https://github.com/rust-lang/cargo/pull/4248
1038 [cargo/4259]: https://github.com/rust-lang/cargo/pull/4259
1039 [cargo/4270]: https://github.com/rust-lang/cargo/pull/4270
1040 [`CStr::into_c_string`]: https://doc.rust-lang.org/std/ffi/struct.CStr.html#method.into_c_string
1041 [`CString::as_c_str`]: https://doc.rust-lang.org/std/ffi/struct.CString.html#method.as_c_str
1042 [`CString::into_boxed_c_str`]: https://doc.rust-lang.org/std/ffi/struct.CString.html#method.into_boxed_c_str
1043 [`Chain::get_mut`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.get_mut
1044 [`Chain::get_ref`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.get_ref
1045 [`Chain::into_inner`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.into_inner
1046 [`Option::get_or_insert_with`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.get_or_insert_with
1047 [`Option::get_or_insert`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.get_or_insert
1048 [`OsStr::into_os_string`]: https://doc.rust-lang.org/std/ffi/struct.OsStr.html#method.into_os_string
1049 [`OsString::into_boxed_os_str`]: https://doc.rust-lang.org/std/ffi/struct.OsString.html#method.into_boxed_os_str
1050 [`Take::get_mut`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.get_mut
1051 [`Take::get_ref`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.get_ref
1052 [`Utf8Error::error_len`]: https://doc.rust-lang.org/std/str/struct.Utf8Error.html#method.error_len
1053 [`char::EscapeDebug`]: https://doc.rust-lang.org/std/char/struct.EscapeDebug.html
1054 [`char::escape_debug`]: https://doc.rust-lang.org/std/primitive.char.html#method.escape_debug
1055 [`compile_error!`]: https://doc.rust-lang.org/std/macro.compile_error.html
1056 [`f32::from_bits`]: https://doc.rust-lang.org/std/primitive.f32.html#method.from_bits
1057 [`f32::to_bits`]: https://doc.rust-lang.org/std/primitive.f32.html#method.to_bits
1058 [`f64::from_bits`]: https://doc.rust-lang.org/std/primitive.f64.html#method.from_bits
1059 [`f64::to_bits`]: https://doc.rust-lang.org/std/primitive.f64.html#method.to_bits
1060 [`mem::ManuallyDrop`]: https://doc.rust-lang.org/std/mem/union.ManuallyDrop.html
1061 [`slice::sort_unstable_by_key`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable_by_key
1062 [`slice::sort_unstable_by`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable_by
1063 [`slice::sort_unstable`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable
1064 [`str::from_boxed_utf8_unchecked`]: https://doc.rust-lang.org/std/str/fn.from_boxed_utf8_unchecked.html
1065 [`str::as_bytes_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.as_bytes_mut
1066 [`str::from_utf8_mut`]: https://doc.rust-lang.org/std/str/fn.from_utf8_mut.html
1067 [`str::from_utf8_unchecked_mut`]: https://doc.rust-lang.org/std/str/fn.from_utf8_unchecked_mut.html
1068 [`str::get_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_mut
1069 [`str::get_unchecked_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_unchecked_mut
1070 [`str::get_unchecked`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_unchecked
1071 [`str::get`]: https://doc.rust-lang.org/std/primitive.str.html#method.get
1072 [`str::into_boxed_bytes`]: https://doc.rust-lang.org/std/primitive.str.html#method.into_boxed_bytes
1075 Version 1.19.0 (2017-07-20)
1076 ===========================
1081 - [Numeric fields can now be used for creating tuple structs.][41145] [RFC 1506]
1082 For example `struct Point(u32, u32); let x = Point { 0: 7, 1: 0 };`.
1083 - [Macro recursion limit increased to 1024 from 64.][41676]
1084 - [Added lint for detecting unused macros.][41907]
1085 - [`loop` can now return a value with `break`.][42016] [RFC 1624]
1086 For example: `let x = loop { break 7; };`
1087 - [C compatible `union`s are now available.][42068] [RFC 1444] They can only
1088 contain `Copy` types and cannot have a `Drop` implementation.
1089 Example: `union Foo { bar: u8, baz: usize }`
1090 - [Non capturing closures can now be coerced into `fn`s,][42162] [RFC 1558]
1091 Example: `let foo: fn(u8) -> u8 = |v: u8| { v };`
1096 - [Add support for bootstrapping the Rust compiler toolchain on Android.][41370]
1097 - [Change `arm-linux-androideabi` to correspond to the `armeabi`
1098 official ABI.][41656] If you wish to continue targeting the `armeabi-v7a` ABI
1099 you should use `--target armv7-linux-androideabi`.
1100 - [Fixed ICE when removing a source file between compilation sessions.][41873]
1101 - [Minor optimisation of string operations.][42037]
1102 - [Compiler error message is now `aborting due to previous error(s)` instead of
1103 `aborting due to N previous errors`][42150] This was previously inaccurate and
1104 would only count certain kinds of errors.
1105 - [The compiler now supports Visual Studio 2017][42225]
1106 - [The compiler is now built against LLVM 4.0.1 by default][42948]
1107 - [Added a lot][42264] of [new error codes][42302]
1108 - [Added `target-feature=+crt-static` option][37406] [RFC 1721] Which allows
1109 libraries with C Run-time Libraries(CRT) to be statically linked.
1110 - [Fixed various ARM codegen bugs][42740]
1115 - [`String` now implements `FromIterator<Cow<'a, str>>` and
1116 `Extend<Cow<'a, str>>`][41449]
1117 - [`Vec` now implements `From<&mut [T]>`][41530]
1118 - [`Box<[u8]>` now implements `From<Box<str>>`][41258]
1119 - [`SplitWhitespace` now implements `Clone`][41659]
1120 - [`[u8]::reverse` is now 5x faster and `[u16]::reverse` is now
1122 - [`eprint!` and `eprintln!` macros added to prelude.][41192] Same as the `print!`
1123 macros, but for printing to stderr.
1128 - [`OsString::shrink_to_fit`]
1131 - [`thread::ThreadId`]
1136 - [Build scripts can now add environment variables to the environment
1137 the crate is being compiled in.
1138 Example: `println!("cargo:rustc-env=FOO=bar");`][cargo/3929]
1139 - [Subcommands now replace the current process rather than spawning a new
1140 child process][cargo/3970]
1141 - [Workspace members can now accept glob file patterns][cargo/3979]
1142 - [Added `--all` flag to the `cargo bench` subcommand to run benchmarks of all
1143 the members in a given workspace.][cargo/3988]
1144 - [Updated `libssh2-sys` to 0.2.6][cargo/4008]
1145 - [Target directory path is now in the cargo metadata][cargo/4022]
1146 - [Cargo no longer checks out a local working directory for the
1147 crates.io index][cargo/4026] This should provide smaller file size for the
1148 registry, and improve cloning times, especially on Windows machines.
1149 - [Added an `--exclude` option for excluding certain packages when using the
1150 `--all` option][cargo/4031]
1151 - [Cargo will now automatically retry when receiving a 5xx error
1152 from crates.io][cargo/4032]
1153 - [The `--features` option now accepts multiple comma or space
1154 delimited values.][cargo/4084]
1155 - [Added support for custom target specific runners][cargo/3954]
1160 - [Added `rust-windbg.cmd`][39983] for loading rust `.natvis` files in the
1162 - [Rust will now release XZ compressed packages][rust-installer/57]
1163 - [rustup will now prefer to download rust packages with
1164 XZ compression][rustup/1100] over GZip packages.
1165 - [Added the ability to escape `#` in rust documentation][41785] By adding
1166 additional `#`'s ie. `##` is now `#`
1171 - [`MutexGuard<T>` may only be `Sync` if `T` is `Sync`.][41624]
1172 - [`-Z` flags are now no longer allowed to be used on the stable
1173 compiler.][41751] This has been a warning for a year previous to this.
1174 - [As a result of the `-Z` flag change, the `cargo-check` plugin no
1175 longer works][42844]. Users should migrate to the built-in `check`
1176 command, which has been available since 1.16.
1177 - [Ending a float literal with `._` is now a hard error.
1178 Example: `42._` .][41946]
1179 - [Any use of a private `extern crate` outside of its module is now a
1180 hard error.][36886] This was previously a warning.
1181 - [`use ::self::foo;` is now a hard error.][36888] `self` paths are always
1182 relative while the `::` prefix makes a path absolute, but was ignored and the
1183 path was relative regardless.
1184 - [Floating point constants in match patterns is now a hard error][36890]
1185 This was previously a warning.
1186 - [Struct or enum constants that don't derive `PartialEq` & `Eq` used
1187 match patterns is now a hard error][36891] This was previously a warning.
1188 - [Lifetimes named `'_` are no longer allowed.][36892] This was previously
1190 - [From the pound escape, lines consisting of multiple `#`s are
1192 - [It is an error to re-export private enum variants][42460]. This is
1193 known to break a number of crates that depend on an older version of
1195 - [On Windows, if `VCINSTALLDIR` is set incorrectly, `rustc` will try
1196 to use it to find the linker, and the build will fail where it did
1197 not previously][42607]
1199 [36886]: https://github.com/rust-lang/rust/issues/36886
1200 [36888]: https://github.com/rust-lang/rust/issues/36888
1201 [36890]: https://github.com/rust-lang/rust/issues/36890
1202 [36891]: https://github.com/rust-lang/rust/issues/36891
1203 [36892]: https://github.com/rust-lang/rust/issues/36892
1204 [37406]: https://github.com/rust-lang/rust/issues/37406
1205 [39983]: https://github.com/rust-lang/rust/pull/39983
1206 [41145]: https://github.com/rust-lang/rust/pull/41145
1207 [41192]: https://github.com/rust-lang/rust/pull/41192
1208 [41258]: https://github.com/rust-lang/rust/pull/41258
1209 [41370]: https://github.com/rust-lang/rust/pull/41370
1210 [41449]: https://github.com/rust-lang/rust/pull/41449
1211 [41530]: https://github.com/rust-lang/rust/pull/41530
1212 [41624]: https://github.com/rust-lang/rust/pull/41624
1213 [41656]: https://github.com/rust-lang/rust/pull/41656
1214 [41659]: https://github.com/rust-lang/rust/pull/41659
1215 [41676]: https://github.com/rust-lang/rust/pull/41676
1216 [41751]: https://github.com/rust-lang/rust/pull/41751
1217 [41764]: https://github.com/rust-lang/rust/pull/41764
1218 [41785]: https://github.com/rust-lang/rust/pull/41785
1219 [41873]: https://github.com/rust-lang/rust/pull/41873
1220 [41907]: https://github.com/rust-lang/rust/pull/41907
1221 [41946]: https://github.com/rust-lang/rust/pull/41946
1222 [42016]: https://github.com/rust-lang/rust/pull/42016
1223 [42037]: https://github.com/rust-lang/rust/pull/42037
1224 [42068]: https://github.com/rust-lang/rust/pull/42068
1225 [42150]: https://github.com/rust-lang/rust/pull/42150
1226 [42162]: https://github.com/rust-lang/rust/pull/42162
1227 [42225]: https://github.com/rust-lang/rust/pull/42225
1228 [42264]: https://github.com/rust-lang/rust/pull/42264
1229 [42302]: https://github.com/rust-lang/rust/pull/42302
1230 [42460]: https://github.com/rust-lang/rust/issues/42460
1231 [42607]: https://github.com/rust-lang/rust/issues/42607
1232 [42740]: https://github.com/rust-lang/rust/pull/42740
1233 [42844]: https://github.com/rust-lang/rust/issues/42844
1234 [42948]: https://github.com/rust-lang/rust/pull/42948
1235 [RFC 1444]: https://github.com/rust-lang/rfcs/pull/1444
1236 [RFC 1506]: https://github.com/rust-lang/rfcs/pull/1506
1237 [RFC 1558]: https://github.com/rust-lang/rfcs/pull/1558
1238 [RFC 1624]: https://github.com/rust-lang/rfcs/pull/1624
1239 [RFC 1721]: https://github.com/rust-lang/rfcs/pull/1721
1240 [`Command::envs`]: https://doc.rust-lang.org/std/process/struct.Command.html#method.envs
1241 [`OsString::shrink_to_fit`]: https://doc.rust-lang.org/std/ffi/struct.OsString.html#method.shrink_to_fit
1242 [`cmp::Reverse`]: https://doc.rust-lang.org/std/cmp/struct.Reverse.html
1243 [`thread::ThreadId`]: https://doc.rust-lang.org/std/thread/struct.ThreadId.html
1244 [cargo/3929]: https://github.com/rust-lang/cargo/pull/3929
1245 [cargo/3954]: https://github.com/rust-lang/cargo/pull/3954
1246 [cargo/3970]: https://github.com/rust-lang/cargo/pull/3970
1247 [cargo/3979]: https://github.com/rust-lang/cargo/pull/3979
1248 [cargo/3988]: https://github.com/rust-lang/cargo/pull/3988
1249 [cargo/4008]: https://github.com/rust-lang/cargo/pull/4008
1250 [cargo/4022]: https://github.com/rust-lang/cargo/pull/4022
1251 [cargo/4026]: https://github.com/rust-lang/cargo/pull/4026
1252 [cargo/4031]: https://github.com/rust-lang/cargo/pull/4031
1253 [cargo/4032]: https://github.com/rust-lang/cargo/pull/4032
1254 [cargo/4084]: https://github.com/rust-lang/cargo/pull/4084
1255 [rust-installer/57]: https://github.com/rust-lang/rust-installer/pull/57
1256 [rustup/1100]: https://github.com/rust-lang-nursery/rustup.rs/pull/1100
1259 Version 1.18.0 (2017-06-08)
1260 ===========================
1265 - [Stabilize pub(restricted)][40556] `pub` can now accept a module path to
1266 make the item visible to just that module tree. Also accepts the keyword
1267 `crate` to make something public to the whole crate but not users of the
1268 library. Example: `pub(crate) mod utils;`. [RFC 1422].
1269 - [Stabilize `#![windows_subsystem]` attribute][40870] conservative exposure of the
1270 `/SUBSYSTEM` linker flag on Windows platforms. [RFC 1665].
1271 - [Refactor of trait object type parsing][40043] Now `ty` in macros can accept
1272 types like `Write + Send`, trailing `+` are now supported in trait objects,
1273 and better error reporting for trait objects starting with `?Sized`.
1274 - [0e+10 is now a valid floating point literal][40589]
1275 - [Now warns if you bind a lifetime parameter to 'static][40734]
1276 - [Tuples, Enum variant fields, and structs with no `repr` attribute or with
1277 `#[repr(Rust)]` are reordered to minimize padding and produce a smaller
1278 representation in some cases.][40377]
1283 - [rustc can now emit mir with `--emit mir`][39891]
1284 - [Improved LLVM IR for trivial functions][40367]
1285 - [Added explanation for E0090(Wrong number of lifetimes are supplied)][40723]
1286 - [rustc compilation is now 15%-20% faster][41469] Thanks to optimisation
1287 opportunities found through profiling
1288 - [Improved backtrace formatting when panicking][38165]
1293 - [Specialized `Vec::from_iter` being passed `vec::IntoIter`][40731] if the
1294 iterator hasn't been advanced the original `Vec` is reassembled with no actual
1295 iteration or reallocation.
1296 - [Simplified HashMap Bucket interface][40561] provides performance
1297 improvements for iterating and cloning.
1298 - [Specialize Vec::from_elem to use calloc][40409]
1299 - [Fixed Race condition in fs::create_dir_all][39799]
1300 - [No longer caching stdio on Windows][40516]
1301 - [Optimized insertion sort in slice][40807] insertion sort in some cases
1302 2.50%~ faster and in one case now 12.50% faster.
1303 - [Optimized `AtomicBool::fetch_nand`][41143]
1308 - [`Child::try_wait`]
1309 - [`HashMap::retain`]
1310 - [`HashSet::retain`]
1312 - [`TcpStream::peek`]
1313 - [`UdpSocket::peek`]
1314 - [`UdpSocket::peek_from`]
1319 - [Added partial Pijul support][cargo/3842] Pijul is a version control system in Rust.
1320 You can now create new cargo projects with Pijul using `cargo new --vcs pijul`
1321 - [Now always emits build script warnings for crates that fail to build][cargo/3847]
1322 - [Added Android build support][cargo/3885]
1323 - [Added `--bins` and `--tests` flags][cargo/3901] now you can build all programs
1324 of a certain type, for example `cargo build --bins` will build all
1326 - [Added support for haiku][cargo/3952]
1331 - [rustdoc can now use pulldown-cmark with the `--enable-commonmark` flag][40338]
1332 - [Added rust-windbg script for better debugging on Windows][39983]
1333 - [Rust now uses the official cross compiler for NetBSD][40612]
1334 - [rustdoc now accepts `#` at the start of files][40828]
1335 - [Fixed jemalloc support for musl][41168]
1340 - [Changes to how the `0` flag works in format!][40241] Padding zeroes are now
1341 always placed after the sign if it exists and before the digits. With the `#`
1342 flag the zeroes are placed after the prefix and before the digits.
1343 - [Due to the struct field optimisation][40377], using `transmute` on structs
1344 that have no `repr` attribute or `#[repr(Rust)]` will no longer work. This has
1345 always been undefined behavior, but is now more likely to break in practice.
1346 - [The refactor of trait object type parsing][40043] fixed a bug where `+` was
1347 receiving the wrong priority parsing things like `&for<'a> Tr<'a> + Send` as
1348 `&(for<'a> Tr<'a> + Send)` instead of `(&for<'a> Tr<'a>) + Send`
1349 - [Overlapping inherent `impl`s are now a hard error][40728]
1350 - [`PartialOrd` and `Ord` must agree on the ordering.][41270]
1351 - [`rustc main.rs -o out --emit=asm,llvm-ir`][41085] Now will output
1352 `out.asm` and `out.ll` instead of only one of the filetypes.
1353 - [ calling a function that returns `Self` will no longer work][41805] when
1354 the size of `Self` cannot be statically determined.
1355 - [rustc now builds with a "pthreads" flavour of MinGW for Windows GNU][40805]
1356 this has caused a few regressions namely:
1358 - Changed the link order of local static/dynamic libraries (respecting the
1359 order on given rather than having the compiler reorder).
1360 - Changed how MinGW is linked, native code linked to dynamic libraries
1361 may require manually linking to the gcc support library (for the native
1364 [38165]: https://github.com/rust-lang/rust/pull/38165
1365 [39799]: https://github.com/rust-lang/rust/pull/39799
1366 [39891]: https://github.com/rust-lang/rust/pull/39891
1367 [39983]: https://github.com/rust-lang/rust/pull/39983
1368 [40043]: https://github.com/rust-lang/rust/pull/40043
1369 [40241]: https://github.com/rust-lang/rust/pull/40241
1370 [40338]: https://github.com/rust-lang/rust/pull/40338
1371 [40367]: https://github.com/rust-lang/rust/pull/40367
1372 [40377]: https://github.com/rust-lang/rust/pull/40377
1373 [40409]: https://github.com/rust-lang/rust/pull/40409
1374 [40516]: https://github.com/rust-lang/rust/pull/40516
1375 [40556]: https://github.com/rust-lang/rust/pull/40556
1376 [40561]: https://github.com/rust-lang/rust/pull/40561
1377 [40589]: https://github.com/rust-lang/rust/pull/40589
1378 [40612]: https://github.com/rust-lang/rust/pull/40612
1379 [40723]: https://github.com/rust-lang/rust/pull/40723
1380 [40728]: https://github.com/rust-lang/rust/pull/40728
1381 [40731]: https://github.com/rust-lang/rust/pull/40731
1382 [40734]: https://github.com/rust-lang/rust/pull/40734
1383 [40805]: https://github.com/rust-lang/rust/pull/40805
1384 [40807]: https://github.com/rust-lang/rust/pull/40807
1385 [40828]: https://github.com/rust-lang/rust/pull/40828
1386 [40870]: https://github.com/rust-lang/rust/pull/40870
1387 [41085]: https://github.com/rust-lang/rust/pull/41085
1388 [41143]: https://github.com/rust-lang/rust/pull/41143
1389 [41168]: https://github.com/rust-lang/rust/pull/41168
1390 [41270]: https://github.com/rust-lang/rust/issues/41270
1391 [41469]: https://github.com/rust-lang/rust/pull/41469
1392 [41805]: https://github.com/rust-lang/rust/issues/41805
1393 [RFC 1422]: https://github.com/rust-lang/rfcs/blob/master/text/1422-pub-restricted.md
1394 [RFC 1665]: https://github.com/rust-lang/rfcs/blob/master/text/1665-windows-subsystem.md
1395 [`Child::try_wait`]: https://doc.rust-lang.org/std/process/struct.Child.html#method.try_wait
1396 [`HashMap::retain`]: https://doc.rust-lang.org/std/collections/struct.HashMap.html#method.retain
1397 [`HashSet::retain`]: https://doc.rust-lang.org/std/collections/struct.HashSet.html#method.retain
1398 [`PeekMut::pop`]: https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html#method.pop
1399 [`TcpStream::peek`]: https://doc.rust-lang.org/std/net/struct.TcpStream.html#method.peek
1400 [`UdpSocket::peek_from`]: https://doc.rust-lang.org/std/net/struct.UdpSocket.html#method.peek_from
1401 [`UdpSocket::peek`]: https://doc.rust-lang.org/std/net/struct.UdpSocket.html#method.peek
1402 [cargo/3842]: https://github.com/rust-lang/cargo/pull/3842
1403 [cargo/3847]: https://github.com/rust-lang/cargo/pull/3847
1404 [cargo/3885]: https://github.com/rust-lang/cargo/pull/3885
1405 [cargo/3901]: https://github.com/rust-lang/cargo/pull/3901
1406 [cargo/3952]: https://github.com/rust-lang/cargo/pull/3952
1409 Version 1.17.0 (2017-04-27)
1410 ===========================
1415 * [The lifetime of statics and consts defaults to `'static`][39265]. [RFC 1623]
1416 * [Fields of structs may be initialized without duplicating the field/variable
1417 names][39761]. [RFC 1682]
1418 * [`Self` may be included in the `where` clause of `impls`][38864]. [RFC 1647]
1419 * [When coercing to an unsized type lifetimes must be equal][40319]. That is,
1420 there is no subtyping between `T` and `U` when `T: Unsize<U>`. For example,
1421 coercing `&mut [&'a X; N]` to `&mut [&'b X]` requires `'a` be equal to
1422 `'b`. Soundness fix.
1423 * [Values passed to the indexing operator, `[]`, automatically coerce][40166]
1424 * [Static variables may contain references to other statics][40027]
1429 * [Exit quickly on only `--emit dep-info`][40336]
1430 * [Make `-C relocation-model` more correctly determine whether the linker
1431 creates a position-independent executable][40245]
1432 * [Add `-C overflow-checks` to directly control whether integer overflow
1434 * [The rustc type checker now checks items on demand instead of in a single
1435 in-order pass][40008]. This is mostly an internal refactoring in support of
1436 future work, including incremental type checking, but also resolves [RFC
1437 1647], allowing `Self` to appear in `impl` `where` clauses.
1438 * [Optimize vtable loads][39995]
1439 * [Turn off vectorization for Emscripten targets][39990]
1440 * [Provide suggestions for unknown macros imported with `use`][39953]
1441 * [Fix ICEs in path resolution][39939]
1442 * [Strip exception handling code on Emscripten when `panic=abort`][39193]
1443 * [Add clearer error message using `&str + &str`][39116]
1454 * [`Ordering::then`]
1455 * [`Ordering::then_with`]
1456 * [`BTreeMap::range`]
1457 * [`BTreeMap::range_mut`]
1458 * [`collections::Bound`]
1459 * [`process::abort`]
1460 * [`ptr::read_unaligned`]
1461 * [`ptr::write_unaligned`]
1462 * [`Result::expect_err`]
1465 * [`Cell::into_inner`]
1471 * [`BTreeMap` and `BTreeSet` can iterate over ranges][27787]
1472 * [`Cell` can store non-`Copy` types][39793]. [RFC 1651]
1473 * [`String` implements `FromIterator<&char>`][40028]
1474 * `Box` [implements][40009] a number of new conversions:
1475 `From<Box<str>> for String`,
1476 `From<Box<[T]>> for Vec<T>`,
1477 `From<Box<CStr>> for CString`,
1478 `From<Box<OsStr>> for OsString`,
1479 `From<Box<Path>> for PathBuf`,
1480 `Into<Box<str>> for String`,
1481 `Into<Box<[T]>> for Vec<T>`,
1482 `Into<Box<CStr>> for CString`,
1483 `Into<Box<OsStr>> for OsString`,
1484 `Into<Box<Path>> for PathBuf`,
1485 `Default for Box<str>`,
1486 `Default for Box<CStr>`,
1487 `Default for Box<OsStr>`,
1488 `From<&CStr> for Box<CStr>`,
1489 `From<&OsStr> for Box<OsStr>`,
1490 `From<&Path> for Box<Path>`
1491 * [`ffi::FromBytesWithNulError` implements `Error` and `Display`][39960]
1492 * [Specialize `PartialOrd<A> for [A] where A: Ord`][39642]
1493 * [Slightly optimize `slice::sort`][39538]
1494 * [Add `ToString` trait specialization for `Cow<'a, str>` and `String`][39440]
1495 * [`Box<[T]>` implements `From<&[T]> where T: Copy`,
1496 `Box<str>` implements `From<&str>`][39438]
1497 * [`IpAddr` implements `From` for various arrays. `SocketAddr` implements
1498 `From<(I, u16)> where I: Into<IpAddr>`][39372]
1499 * [`format!` estimates the needed capacity before writing a string][39356]
1500 * [Support unprivileged symlink creation in Windows][38921]
1501 * [`PathBuf` implements `Default`][38764]
1502 * [Implement `PartialEq<[A]>` for `VecDeque<A>`][38661]
1503 * [`HashMap` resizes adaptively][38368] to guard against DOS attacks
1504 and poor hash functions.
1509 * [Add `cargo check --all`][cargo/3731]
1510 * [Add an option to ignore SSL revocation checking][cargo/3699]
1511 * [Add `cargo run --package`][cargo/3691]
1512 * [Add `required_features`][cargo/3667]
1513 * [Assume `build.rs` is a build script][cargo/3664]
1514 * [Find workspace via `workspace_root` link in containing member][cargo/3562]
1519 * [Documentation is rendered with mdbook instead of the obsolete, in-tree
1521 * [The "Unstable Book" documents nightly-only features][ubook]
1522 * [Improve the style of the sidebar in rustdoc output][40265]
1523 * [Configure build correctly on 64-bit CPU's with the armhf ABI][40261]
1524 * [Fix MSP430 breakage due to `i128`][40257]
1525 * [Preliminary Solaris/SPARCv9 support][39903]
1526 * [`rustc` is linked statically on Windows MSVC targets][39837], allowing it to
1527 run without installing the MSVC runtime.
1528 * [`rustdoc --test` includes file names in test names][39788]
1529 * This release includes builds of `std` for `sparc64-unknown-linux-gnu`,
1530 `aarch64-unknown-linux-fuchsia`, and `x86_64-unknown-linux-fuchsia`.
1531 * [Initial support for `aarch64-unknown-freebsd`][39491]
1532 * [Initial support for `i686-unknown-netbsd`][39426]
1533 * [This release no longer includes the old makefile build system][39431]. Rust
1534 is built with a custom build system, written in Rust, and with Cargo.
1535 * [Add Debug implementations for libcollection structs][39002]
1536 * [`TypeId` implements `PartialOrd` and `Ord`][38981]
1537 * [`--test-threads=0` produces an error][38945]
1538 * [`rustup` installs documentation by default][40526]
1539 * [The Rust source includes NatVis visualizations][39843]. These can be used by
1540 WinDbg and Visual Studio to improve the debugging experience.
1545 * [Rust 1.17 does not correctly detect the MSVC 2017 linker][38584]. As a
1546 workaround, either use MSVC 2015 or run vcvars.bat.
1547 * [When coercing to an unsized type lifetimes must be equal][40319]. That is,
1548 disallow subtyping between `T` and `U` when `T: Unsize<U>`, e.g. coercing
1549 `&mut [&'a X; N]` to `&mut [&'b X]` requires `'a` be equal to `'b`. Soundness
1551 * [`format!` and `Display::to_string` panic if an underlying formatting
1552 implementation returns an error][40117]. Previously the error was silently
1553 ignored. It is incorrect for `write_fmt` to return an error when writing
1555 * [In-tree crates are verified to be unstable][39851]. Previously, some minor
1556 crates were marked stable and could be accessed from the stable toolchain.
1557 * [Rust git source no longer includes vendored crates][39728]. Those that need
1558 to build with vendored crates should build from release tarballs.
1559 * [Fix inert attributes from `proc_macro_derives`][39572]
1560 * [During crate resolution, rustc prefers a crate in the sysroot if two crates
1561 are otherwise identical][39518]. Unlikely to be encountered outside the Rust
1563 * [Fixed bugs around how type inference interacts with dead-code][39485]. The
1564 existing code generally ignores the type of dead-code unless a type-hint is
1565 provided; this can cause surprising inference interactions particularly around
1566 defaulting. The new code uniformly ignores the result type of dead-code.
1567 * [Tuple-struct constructors with private fields are no longer visible][38932]
1568 * [Lifetime parameters that do not appear in the arguments are now considered
1569 early-bound][38897], resolving a soundness bug (#[32330]). The
1570 `hr_lifetime_in_assoc_type` future-compatibility lint has been in effect since
1572 * [rustdoc: fix doctests with non-feature crate attributes][38161]
1573 * [Make transmuting from fn item types to pointer-sized types a hard
1576 [27787]: https://github.com/rust-lang/rust/issues/27787
1577 [32330]: https://github.com/rust-lang/rust/issues/32330
1578 [34198]: https://github.com/rust-lang/rust/pull/34198
1579 [38161]: https://github.com/rust-lang/rust/pull/38161
1580 [38368]: https://github.com/rust-lang/rust/pull/38368
1581 [38584]: https://github.com/rust-lang/rust/issues/38584
1582 [38661]: https://github.com/rust-lang/rust/pull/38661
1583 [38764]: https://github.com/rust-lang/rust/pull/38764
1584 [38864]: https://github.com/rust-lang/rust/issues/38864
1585 [38897]: https://github.com/rust-lang/rust/pull/38897
1586 [38921]: https://github.com/rust-lang/rust/pull/38921
1587 [38932]: https://github.com/rust-lang/rust/pull/38932
1588 [38945]: https://github.com/rust-lang/rust/pull/38945
1589 [38981]: https://github.com/rust-lang/rust/pull/38981
1590 [39002]: https://github.com/rust-lang/rust/pull/39002
1591 [39116]: https://github.com/rust-lang/rust/pull/39116
1592 [39193]: https://github.com/rust-lang/rust/pull/39193
1593 [39265]: https://github.com/rust-lang/rust/pull/39265
1594 [39356]: https://github.com/rust-lang/rust/pull/39356
1595 [39372]: https://github.com/rust-lang/rust/pull/39372
1596 [39426]: https://github.com/rust-lang/rust/pull/39426
1597 [39431]: https://github.com/rust-lang/rust/pull/39431
1598 [39438]: https://github.com/rust-lang/rust/pull/39438
1599 [39440]: https://github.com/rust-lang/rust/pull/39440
1600 [39485]: https://github.com/rust-lang/rust/pull/39485
1601 [39491]: https://github.com/rust-lang/rust/pull/39491
1602 [39518]: https://github.com/rust-lang/rust/pull/39518
1603 [39538]: https://github.com/rust-lang/rust/pull/39538
1604 [39572]: https://github.com/rust-lang/rust/pull/39572
1605 [39633]: https://github.com/rust-lang/rust/pull/39633
1606 [39642]: https://github.com/rust-lang/rust/pull/39642
1607 [39728]: https://github.com/rust-lang/rust/pull/39728
1608 [39761]: https://github.com/rust-lang/rust/pull/39761
1609 [39788]: https://github.com/rust-lang/rust/pull/39788
1610 [39793]: https://github.com/rust-lang/rust/pull/39793
1611 [39837]: https://github.com/rust-lang/rust/pull/39837
1612 [39843]: https://github.com/rust-lang/rust/pull/39843
1613 [39851]: https://github.com/rust-lang/rust/pull/39851
1614 [39903]: https://github.com/rust-lang/rust/pull/39903
1615 [39939]: https://github.com/rust-lang/rust/pull/39939
1616 [39953]: https://github.com/rust-lang/rust/pull/39953
1617 [39960]: https://github.com/rust-lang/rust/pull/39960
1618 [39990]: https://github.com/rust-lang/rust/pull/39990
1619 [39995]: https://github.com/rust-lang/rust/pull/39995
1620 [40008]: https://github.com/rust-lang/rust/pull/40008
1621 [40009]: https://github.com/rust-lang/rust/pull/40009
1622 [40027]: https://github.com/rust-lang/rust/pull/40027
1623 [40028]: https://github.com/rust-lang/rust/pull/40028
1624 [40037]: https://github.com/rust-lang/rust/pull/40037
1625 [40117]: https://github.com/rust-lang/rust/pull/40117
1626 [40166]: https://github.com/rust-lang/rust/pull/40166
1627 [40245]: https://github.com/rust-lang/rust/pull/40245
1628 [40257]: https://github.com/rust-lang/rust/pull/40257
1629 [40261]: https://github.com/rust-lang/rust/pull/40261
1630 [40265]: https://github.com/rust-lang/rust/pull/40265
1631 [40319]: https://github.com/rust-lang/rust/pull/40319
1632 [40336]: https://github.com/rust-lang/rust/pull/40336
1633 [40526]: https://github.com/rust-lang/rust/pull/40526
1634 [RFC 1623]: https://github.com/rust-lang/rfcs/blob/master/text/1623-static.md
1635 [RFC 1647]: https://github.com/rust-lang/rfcs/blob/master/text/1647-allow-self-in-where-clauses.md
1636 [RFC 1651]: https://github.com/rust-lang/rfcs/blob/master/text/1651-movecell.md
1637 [RFC 1682]: https://github.com/rust-lang/rfcs/blob/master/text/1682-field-init-shorthand.md
1638 [`Arc::from_raw`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.from_raw
1639 [`Arc::into_raw`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.into_raw
1640 [`Arc::ptr_eq`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.ptr_eq
1641 [`BTreeMap::range_mut`]: https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.range_mut
1642 [`BTreeMap::range`]: https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.range
1643 [`Cell::into_inner`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.into_inner
1644 [`Cell::replace`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.replace
1645 [`Cell::swap`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.swap
1646 [`Cell::take`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.take
1647 [`Ordering::then_with`]: https://doc.rust-lang.org/std/cmp/enum.Ordering.html#method.then_with
1648 [`Ordering::then`]: https://doc.rust-lang.org/std/cmp/enum.Ordering.html#method.then
1649 [`Rc::from_raw`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.from_raw
1650 [`Rc::into_raw`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.into_raw
1651 [`Rc::ptr_eq`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.ptr_eq
1652 [`Result::expect_err`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.expect_err
1653 [`collections::Bound`]: https://doc.rust-lang.org/std/collections/enum.Bound.html
1654 [`process::abort`]: https://doc.rust-lang.org/std/process/fn.abort.html
1655 [`ptr::read_unaligned`]: https://doc.rust-lang.org/std/ptr/fn.read_unaligned.html
1656 [`ptr::write_unaligned`]: https://doc.rust-lang.org/std/ptr/fn.write_unaligned.html
1657 [cargo/3562]: https://github.com/rust-lang/cargo/pull/3562
1658 [cargo/3664]: https://github.com/rust-lang/cargo/pull/3664
1659 [cargo/3667]: https://github.com/rust-lang/cargo/pull/3667
1660 [cargo/3691]: https://github.com/rust-lang/cargo/pull/3691
1661 [cargo/3699]: https://github.com/rust-lang/cargo/pull/3699
1662 [cargo/3731]: https://github.com/rust-lang/cargo/pull/3731
1663 [mdbook]: https://crates.io/crates/mdbook
1664 [ubook]: https://doc.rust-lang.org/unstable-book/
1667 Version 1.16.0 (2017-03-16)
1668 ===========================
1673 * [The compiler's `dead_code` lint now accounts for type aliases][38051].
1674 * [Uninhabitable enums (those without any variants) no longer permit wildcard
1675 match patterns][38069]
1676 * [Clean up semantics of `self` in an import list][38313]
1677 * [`Self` may appear in `impl` headers][38920]
1678 * [`Self` may appear in struct expressions][39282]
1683 * [`rustc` now supports `--emit=metadata`, which causes rustc to emit
1684 a `.rmeta` file containing only crate metadata][38571]. This can be
1685 used by tools like the Rust Language Service to perform
1686 metadata-only builds.
1687 * [Levenshtein based typo suggestions now work in most places, while
1688 previously they worked only for fields and sometimes for local
1689 variables][38927]. Together with the overhaul of "no
1690 resolution"/"unexpected resolution" errors (#[38154]) they result in
1691 large and systematic improvement in resolution diagnostics.
1692 * [Fix `transmute::<T, U>` where `T` requires a bigger alignment than
1694 * [rustc: use -Xlinker when specifying an rpath with ',' in it][38798]
1695 * [`rustc` no longer attempts to provide "consider using an explicit
1696 lifetime" suggestions][37057]. They were inaccurate.
1701 * [`VecDeque::truncate`]
1702 * [`VecDeque::resize`]
1703 * [`String::insert_str`]
1704 * [`Duration::checked_add`]
1705 * [`Duration::checked_sub`]
1706 * [`Duration::checked_div`]
1707 * [`Duration::checked_mul`]
1710 * [`SocketAddr::is_ipv4`]
1711 * [`SocketAddr::is_ipv6`]
1712 * [`IpAddr::is_ipv4`]
1713 * [`IpAddr::is_ipv6`]
1715 * [`Vec::dedup_by_key`]
1716 * [`Result::unwrap_or_default`]
1717 * [`<*const T>::wrapping_offset`]
1718 * [`<*mut T>::wrapping_offset`]
1719 * `CommandExt::creation_flags`
1720 * [`File::set_permissions`]
1721 * [`String::split_off`]
1726 * [`[T]::binary_search` and `[T]::binary_search_by_key` now take
1727 their argument by `Borrow` parameter][37761]
1728 * [All public types in std implement `Debug`][38006]
1729 * [`IpAddr` implements `From<Ipv4Addr>` and `From<Ipv6Addr>`][38327]
1730 * [`Ipv6Addr` implements `From<[u16; 8]>`][38131]
1731 * [Ctrl-Z returns from `Stdin.read()` when reading from the console on
1733 * [std: Fix partial writes in `LineWriter`][38062]
1734 * [std: Clamp max read/write sizes on Unix][38062]
1735 * [Use more specific panic message for `&str` slicing errors][38066]
1736 * [`TcpListener::set_only_v6` is deprecated][38304]. This
1737 functionality cannot be achieved in std currently.
1738 * [`writeln!`, like `println!`, now accepts a form with no string
1739 or formatting arguments, to just print a newline][38469]
1740 * [Implement `iter::Sum` and `iter::Product` for `Result`][38580]
1741 * [Reduce the size of static data in `std_unicode::tables`][38781]
1742 * [`char::EscapeDebug`, `EscapeDefault`, `EscapeUnicode`,
1743 `CaseMappingIter`, `ToLowercase`, `ToUppercase`, implement
1745 * [`Duration` implements `Sum`][38712]
1746 * [`String` implements `ToSocketAddrs`][39048]
1751 * [The `cargo check` command does a type check of a project without
1752 building it][cargo/3296]
1753 * [crates.io will display CI badges from Travis and AppVeyor, if
1754 specified in Cargo.toml][cargo/3546]
1755 * [crates.io will display categories listed in Cargo.toml][cargo/3301]
1756 * [Compilation profiles accept integer values for `debug`, in addition
1757 to `true` and `false`. These are passed to `rustc` as the value to
1758 `-C debuginfo`][cargo/3534]
1759 * [Implement `cargo --version --verbose`][cargo/3604]
1760 * [All builds now output 'dep-info' build dependencies compatible with
1761 make and ninja][cargo/3557]
1762 * [Build all workspace members with `build --all`][cargo/3511]
1763 * [Document all workspace members with `doc --all`][cargo/3515]
1764 * [Path deps outside workspace are not members][cargo/3443]
1769 * [`rustdoc` has a `--sysroot` argument that, like `rustc`, specifies
1770 the path to the Rust implementation][38589]
1771 * [The `armv7-linux-androideabi` target no longer enables NEON
1772 extensions, per Google's ABI guide][38413]
1773 * [The stock standard library can be compiled for Redox OS][38401]
1774 * [Rust has initial SPARC support][38726]. Tier 3. No builds
1776 * [Rust has experimental support for Nvidia PTX][38559]. Tier 3. No
1778 * [Fix backtraces on i686-pc-windows-gnu by disabling FPO][39379]
1783 * [Uninhabitable enums (those without any variants) no longer permit wildcard
1784 match patterns][38069]
1785 * In this release, references to uninhabited types can not be
1786 pattern-matched. This was accidentally allowed in 1.15.
1787 * [The compiler's `dead_code` lint now accounts for type aliases][38051].
1788 * [Ctrl-Z returns from `Stdin.read()` when reading from the console on
1790 * [Clean up semantics of `self` in an import list][38313]
1791 * Reimplemented lifetime elision. This change was almost entirely compatible
1792 with existing code, but it did close a number of small bugs and loopholes,
1793 as well as being more accepting in some other [cases][41105].
1795 [37057]: https://github.com/rust-lang/rust/pull/37057
1796 [37761]: https://github.com/rust-lang/rust/pull/37761
1797 [38006]: https://github.com/rust-lang/rust/pull/38006
1798 [38051]: https://github.com/rust-lang/rust/pull/38051
1799 [38062]: https://github.com/rust-lang/rust/pull/38062
1800 [38062]: https://github.com/rust-lang/rust/pull/38622
1801 [38066]: https://github.com/rust-lang/rust/pull/38066
1802 [38069]: https://github.com/rust-lang/rust/pull/38069
1803 [38131]: https://github.com/rust-lang/rust/pull/38131
1804 [38154]: https://github.com/rust-lang/rust/pull/38154
1805 [38274]: https://github.com/rust-lang/rust/pull/38274
1806 [38304]: https://github.com/rust-lang/rust/pull/38304
1807 [38313]: https://github.com/rust-lang/rust/pull/38313
1808 [38314]: https://github.com/rust-lang/rust/pull/38314
1809 [38327]: https://github.com/rust-lang/rust/pull/38327
1810 [38401]: https://github.com/rust-lang/rust/pull/38401
1811 [38413]: https://github.com/rust-lang/rust/pull/38413
1812 [38469]: https://github.com/rust-lang/rust/pull/38469
1813 [38559]: https://github.com/rust-lang/rust/pull/38559
1814 [38571]: https://github.com/rust-lang/rust/pull/38571
1815 [38580]: https://github.com/rust-lang/rust/pull/38580
1816 [38589]: https://github.com/rust-lang/rust/pull/38589
1817 [38670]: https://github.com/rust-lang/rust/pull/38670
1818 [38712]: https://github.com/rust-lang/rust/pull/38712
1819 [38726]: https://github.com/rust-lang/rust/pull/38726
1820 [38781]: https://github.com/rust-lang/rust/pull/38781
1821 [38798]: https://github.com/rust-lang/rust/pull/38798
1822 [38909]: https://github.com/rust-lang/rust/pull/38909
1823 [38920]: https://github.com/rust-lang/rust/pull/38920
1824 [38927]: https://github.com/rust-lang/rust/pull/38927
1825 [39048]: https://github.com/rust-lang/rust/pull/39048
1826 [39282]: https://github.com/rust-lang/rust/pull/39282
1827 [39379]: https://github.com/rust-lang/rust/pull/39379
1828 [41105]: https://github.com/rust-lang/rust/issues/41105
1829 [`<*const T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset
1830 [`<*mut T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset
1831 [`Duration::checked_add`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_add
1832 [`Duration::checked_div`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_div
1833 [`Duration::checked_mul`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_mul
1834 [`Duration::checked_sub`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_sub
1835 [`File::set_permissions`]: https://doc.rust-lang.org/std/fs/struct.File.html#method.set_permissions
1836 [`IpAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv4
1837 [`IpAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv6
1838 [`Result::unwrap_or_default`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.unwrap_or_default
1839 [`SocketAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv4
1840 [`SocketAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv6
1841 [`String::insert_str`]: https://doc.rust-lang.org/std/string/struct.String.html#method.insert_str
1842 [`String::split_off`]: https://doc.rust-lang.org/std/string/struct.String.html#method.split_off
1843 [`Vec::dedup_by_key`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by_key
1844 [`Vec::dedup_by`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by
1845 [`VecDeque::resize`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.resize
1846 [`VecDeque::truncate`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.truncate
1847 [`str::repeat`]: https://doc.rust-lang.org/std/primitive.str.html#method.repeat
1848 [`str::replacen`]: https://doc.rust-lang.org/std/primitive.str.html#method.replacen
1849 [cargo/3296]: https://github.com/rust-lang/cargo/pull/3296
1850 [cargo/3301]: https://github.com/rust-lang/cargo/pull/3301
1851 [cargo/3443]: https://github.com/rust-lang/cargo/pull/3443
1852 [cargo/3511]: https://github.com/rust-lang/cargo/pull/3511
1853 [cargo/3515]: https://github.com/rust-lang/cargo/pull/3515
1854 [cargo/3534]: https://github.com/rust-lang/cargo/pull/3534
1855 [cargo/3546]: https://github.com/rust-lang/cargo/pull/3546
1856 [cargo/3557]: https://github.com/rust-lang/cargo/pull/3557
1857 [cargo/3604]: https://github.com/rust-lang/cargo/pull/3604
1858 [RFC 1623]: https://github.com/rust-lang/rfcs/blob/master/text/1623-static.md
1861 Version 1.15.1 (2017-02-09)
1862 ===========================
1864 * [Fix IntoIter::as_mut_slice's signature][39466]
1865 * [Compile compiler builtins with `-fPIC` on 32-bit platforms][39523]
1867 [39466]: https://github.com/rust-lang/rust/pull/39466
1868 [39523]: https://github.com/rust-lang/rust/pull/39523
1871 Version 1.15.0 (2017-02-02)
1872 ===========================
1877 * Basic procedural macros allowing custom `#[derive]`, aka "macros 1.1", are
1878 stable. This allows popular code-generating crates like Serde and Diesel to
1879 work ergonomically. [RFC 1681].
1880 * [Tuple structs may be empty. Unary and empty tuple structs may be instantiated
1881 with curly braces][36868]. Part of [RFC 1506].
1882 * [A number of minor changes to name resolution have been activated][37127].
1883 They add up to more consistent semantics, allowing for future evolution of
1884 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
1885 details of what is different. The breaking changes here have been transitioned
1886 through the [`legacy_imports`] lint since 1.14, with no known regressions.
1887 * [In `macro_rules`, `path` fragments can now be parsed as type parameter
1889 * [`?Sized` can be used in `where` clauses][37791]
1890 * [There is now a limit on the size of monomorphized types and it can be
1891 modified with the `#![type_size_limit]` crate attribute, similarly to
1892 the `#![recursion_limit]` attribute][37789]
1897 * [On Windows, the compiler will apply dllimport attributes when linking to
1898 extern functions][37973]. Additional attributes and flags can control which
1899 library kind is linked and its name. [RFC 1717].
1900 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
1901 * [The `--test` flag works with procedural macro crates][38107]
1902 * [Fix `extern "aapcs" fn` ABI][37814]
1903 * [The `-C no-stack-check` flag is deprecated][37636]. It does nothing.
1904 * [The `format!` expander recognizes incorrect `printf` and shell-style
1905 formatting directives and suggests the correct format][37613].
1906 * [Only report one error for all unused imports in an import list][37456]
1908 Compiler Performance
1909 --------------------
1911 * [Avoid unnecessary `mk_ty` calls in `Ty::super_fold_with`][37705]
1912 * [Avoid more unnecessary `mk_ty` calls in `Ty::super_fold_with`][37979]
1913 * [Don't clone in `UnificationTable::probe`][37848]
1914 * [Remove `scope_auxiliary` to cut RSS by 10%][37764]
1915 * [Use small vectors in type walker][37760]
1916 * [Macro expansion performance was improved][37701]
1917 * [Change `HirVec<P<T>>` to `HirVec<T>` in `hir::Expr`][37642]
1918 * [Replace FNV with a faster hash function][37229]
1923 * [`std::iter::Iterator::min_by`]
1924 * [`std::iter::Iterator::max_by`]
1925 * [`std::os::*::fs::FileExt`]
1926 * [`std::sync::atomic::Atomic*::get_mut`]
1927 * [`std::sync::atomic::Atomic*::into_inner`]
1928 * [`std::vec::IntoIter::as_slice`]
1929 * [`std::vec::IntoIter::as_mut_slice`]
1930 * [`std::sync::mpsc::Receiver::try_iter`]
1931 * [`std::os::unix::process::CommandExt::before_exec`]
1932 * [`std::rc::Rc::strong_count`]
1933 * [`std::rc::Rc::weak_count`]
1934 * [`std::sync::Arc::strong_count`]
1935 * [`std::sync::Arc::weak_count`]
1936 * [`std::char::encode_utf8`]
1937 * [`std::char::encode_utf16`]
1938 * [`std::cell::Ref::clone`]
1939 * [`std::io::Take::into_inner`]
1944 * [The standard sorting algorithm has been rewritten for dramatic performance
1945 improvements][38192]. It is a hybrid merge sort, drawing influences from
1946 Timsort. Previously it was a naive merge sort.
1947 * [`Iterator::nth` no longer has a `Sized` bound][38134]
1948 * [`Extend<&T>` is specialized for `Vec` where `T: Copy`][38182] to improve
1950 * [`chars().count()` is much faster][37888] and so are [`chars().last()`
1951 and `char_indices().last()`][37882]
1952 * [Fix ARM Objective-C ABI in `std::env::args`][38146]
1953 * [Chinese characters display correctly in `fmt::Debug`][37855]
1954 * [Derive `Default` for `Duration`][37699]
1955 * [Support creation of anonymous pipes on WinXP/2k][37677]
1956 * [`mpsc::RecvTimeoutError` implements `Error`][37527]
1957 * [Don't pass overlapped handles to processes][38835]
1962 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
1963 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
1964 should instead check the variable at runtime with `std::env`. That the value
1965 was set at build time was a bug, and incorrect when cross-compiling. This
1966 change is known to cause breakage.
1967 * [Add `--all` flag to `cargo test`][cargo/3221]
1968 * [Compile statically against the MSVC CRT][cargo/3363]
1969 * [Mix feature flags into fingerprint/metadata shorthash][cargo/3102]
1970 * [Link OpenSSL statically on OSX][cargo/3311]
1971 * [Apply new fingerprinting to build dir outputs][cargo/3310]
1972 * [Test for bad path overrides with summaries][cargo/3336]
1973 * [Require `cargo install --vers` to take a semver version][cargo/3338]
1974 * [Fix retrying crate downloads for network errors][cargo/3348]
1975 * [Implement string lookup for `build.rustflags` config key][cargo/3356]
1976 * [Emit more info on --message-format=json][cargo/3319]
1977 * [Assume `build.rs` in the same directory as `Cargo.toml` is a build script][cargo/3361]
1978 * [Don't ignore errors in workspace manifest][cargo/3409]
1979 * [Fix `--message-format JSON` when rustc emits non-JSON warnings][cargo/3410]
1984 * [Test runners (binaries built with `--test`) now support a `--list` argument
1985 that lists the tests it contains][38185]
1986 * [Test runners now support a `--exact` argument that makes the test filter
1987 match exactly, instead of matching only a substring of the test name][38181]
1988 * [rustdoc supports a `--playground-url` flag][37763]
1989 * [rustdoc provides more details about `#[should_panic]` errors][37749]
1994 * [The Rust build system is now written in Rust][37817]. The Makefiles may
1995 continue to be used in this release by passing `--disable-rustbuild` to the
1996 configure script, but they will be deleted soon. Note that the new build
1997 system uses a different on-disk layout that will likely affect any scripts
1999 * [Rust supports i686-unknown-openbsd][38086]. Tier 3 support. No testing or
2001 * [Rust supports the MSP430][37627]. Tier 3 support. No testing or releases.
2002 * [Rust supports the ARMv5TE architecture][37615]. Tier 3 support. No testing or
2008 * [A number of minor changes to name resolution have been activated][37127].
2009 They add up to more consistent semantics, allowing for future evolution of
2010 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
2011 details of what is different. The breaking changes here have been transitioned
2012 through the [`legacy_imports`] lint since 1.14, with no known regressions.
2013 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
2014 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
2015 should instead check the variable at runtime with `std::env`. That the value
2016 was set at build time was a bug, and incorrect when cross-compiling. This
2017 change is known to cause breakage.
2018 * [Higher-ranked lifetimes are no longer allowed to appear _only_ in associated
2019 types][33685]. The [`hr_lifetime_in_assoc_type` lint] has been a warning since
2020 1.10 and is now an error by default. It will become a hard error in the near
2022 * [The semantics relating modules to file system directories are changing in
2023 minor ways][37602]. This is captured in the new `legacy_directory_ownership`
2024 lint, which is a warning in this release, and will become a hard error in the
2026 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
2027 * [Once `Peekable` peeks a `None` it will return that `None` without re-querying
2028 the underlying iterator][37834]
2030 ["changes"]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md#changes-to-name-resolution-rules
2031 [33685]: https://github.com/rust-lang/rust/issues/33685
2032 [36868]: https://github.com/rust-lang/rust/pull/36868
2033 [37127]: https://github.com/rust-lang/rust/pull/37127
2034 [37229]: https://github.com/rust-lang/rust/pull/37229
2035 [37456]: https://github.com/rust-lang/rust/pull/37456
2036 [37527]: https://github.com/rust-lang/rust/pull/37527
2037 [37602]: https://github.com/rust-lang/rust/pull/37602
2038 [37613]: https://github.com/rust-lang/rust/pull/37613
2039 [37615]: https://github.com/rust-lang/rust/pull/37615
2040 [37636]: https://github.com/rust-lang/rust/pull/37636
2041 [37627]: https://github.com/rust-lang/rust/pull/37627
2042 [37642]: https://github.com/rust-lang/rust/pull/37642
2043 [37677]: https://github.com/rust-lang/rust/pull/37677
2044 [37699]: https://github.com/rust-lang/rust/pull/37699
2045 [37701]: https://github.com/rust-lang/rust/pull/37701
2046 [37705]: https://github.com/rust-lang/rust/pull/37705
2047 [37749]: https://github.com/rust-lang/rust/pull/37749
2048 [37760]: https://github.com/rust-lang/rust/pull/37760
2049 [37763]: https://github.com/rust-lang/rust/pull/37763
2050 [37764]: https://github.com/rust-lang/rust/pull/37764
2051 [37789]: https://github.com/rust-lang/rust/pull/37789
2052 [37791]: https://github.com/rust-lang/rust/pull/37791
2053 [37814]: https://github.com/rust-lang/rust/pull/37814
2054 [37817]: https://github.com/rust-lang/rust/pull/37817
2055 [37834]: https://github.com/rust-lang/rust/pull/37834
2056 [37848]: https://github.com/rust-lang/rust/pull/37848
2057 [37855]: https://github.com/rust-lang/rust/pull/37855
2058 [37882]: https://github.com/rust-lang/rust/pull/37882
2059 [37888]: https://github.com/rust-lang/rust/pull/37888
2060 [37973]: https://github.com/rust-lang/rust/pull/37973
2061 [37979]: https://github.com/rust-lang/rust/pull/37979
2062 [38086]: https://github.com/rust-lang/rust/pull/38086
2063 [38107]: https://github.com/rust-lang/rust/pull/38107
2064 [38117]: https://github.com/rust-lang/rust/pull/38117
2065 [38134]: https://github.com/rust-lang/rust/pull/38134
2066 [38146]: https://github.com/rust-lang/rust/pull/38146
2067 [38181]: https://github.com/rust-lang/rust/pull/38181
2068 [38182]: https://github.com/rust-lang/rust/pull/38182
2069 [38185]: https://github.com/rust-lang/rust/pull/38185
2070 [38192]: https://github.com/rust-lang/rust/pull/38192
2071 [38279]: https://github.com/rust-lang/rust/pull/38279
2072 [38835]: https://github.com/rust-lang/rust/pull/38835
2073 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
2074 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
2075 [RFC 1560]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md
2076 [RFC 1681]: https://github.com/rust-lang/rfcs/blob/master/text/1681-macros-1.1.md
2077 [RFC 1717]: https://github.com/rust-lang/rfcs/blob/master/text/1717-dllimport.md
2078 [`hr_lifetime_in_assoc_type` lint]: https://github.com/rust-lang/rust/issues/33685
2079 [`legacy_imports`]: https://github.com/rust-lang/rust/pull/38271
2080 [cargo/3102]: https://github.com/rust-lang/cargo/pull/3102
2081 [cargo/3221]: https://github.com/rust-lang/cargo/pull/3221
2082 [cargo/3310]: https://github.com/rust-lang/cargo/pull/3310
2083 [cargo/3311]: https://github.com/rust-lang/cargo/pull/3311
2084 [cargo/3319]: https://github.com/rust-lang/cargo/pull/3319
2085 [cargo/3336]: https://github.com/rust-lang/cargo/pull/3336
2086 [cargo/3338]: https://github.com/rust-lang/cargo/pull/3338
2087 [cargo/3348]: https://github.com/rust-lang/cargo/pull/3348
2088 [cargo/3356]: https://github.com/rust-lang/cargo/pull/3356
2089 [cargo/3361]: https://github.com/rust-lang/cargo/pull/3361
2090 [cargo/3363]: https://github.com/rust-lang/cargo/pull/3363
2091 [cargo/3368]: https://github.com/rust-lang/cargo/issues/3368
2092 [cargo/3409]: https://github.com/rust-lang/cargo/pull/3409
2093 [cargo/3410]: https://github.com/rust-lang/cargo/pull/3410
2094 [`std::iter::Iterator::min_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.min_by
2095 [`std::iter::Iterator::max_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.max_by
2096 [`std::os::*::fs::FileExt`]: https://doc.rust-lang.org/std/os/unix/fs/trait.FileExt.html
2097 [`std::sync::atomic::Atomic*::get_mut`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.get_mut
2098 [`std::sync::atomic::Atomic*::into_inner`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.into_inner
2099 [`std::vec::IntoIter::as_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_slice
2100 [`std::vec::IntoIter::as_mut_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_mut_slice
2101 [`std::sync::mpsc::Receiver::try_iter`]: https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.try_iter
2102 [`std::os::unix::process::CommandExt::before_exec`]: https://doc.rust-lang.org/std/os/unix/process/trait.CommandExt.html#tymethod.before_exec
2103 [`std::rc::Rc::strong_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.strong_count
2104 [`std::rc::Rc::weak_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.weak_count
2105 [`std::sync::Arc::strong_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.strong_count
2106 [`std::sync::Arc::weak_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.weak_count
2107 [`std::char::encode_utf8`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf8
2108 [`std::char::encode_utf16`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf16
2109 [`std::cell::Ref::clone`]: https://doc.rust-lang.org/std/cell/struct.Ref.html#method.clone
2110 [`std::io::Take::into_inner`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.into_inner
2113 Version 1.14.0 (2016-12-22)
2114 ===========================
2119 * [`..` matches multiple tuple fields in enum variants, structs
2120 and tuples][36843]. [RFC 1492].
2121 * [Safe `fn` items can be coerced to `unsafe fn` pointers][37389]
2122 * [`use *` and `use ::*` both glob-import from the crate root][37367]
2123 * [It's now possible to call a `Vec<Box<Fn()>>` without explicit
2124 dereferencing][36822]
2129 * [Mark enums with non-zero discriminant as non-zero][37224]
2130 * [Lower-case `static mut` names are linted like other
2131 statics and consts][37162]
2132 * [Fix ICE on some macros in const integer positions
2133 (e.g. `[u8; m!()]`)][36819]
2134 * [Improve error message and snippet for "did you mean `x`"][36798]
2135 * [Add a panic-strategy field to the target specification][36794]
2136 * [Include LLVM version in `--version --verbose`][37200]
2138 Compile-time Optimizations
2139 --------------------------
2141 * [Improve macro expansion performance][37569]
2142 * [Shrink `Expr_::ExprInlineAsm`][37445]
2143 * [Replace all uses of SHA-256 with BLAKE2b][37439]
2144 * [Reduce the number of bytes hashed by `IchHasher`][37427]
2145 * [Avoid more allocations when compiling html5ever][37373]
2146 * [Use `SmallVector` in `CombineFields::instantiate`][37322]
2147 * [Avoid some allocations in the macro parser][37318]
2148 * [Use a faster deflate setting][37298]
2149 * [Add `ArrayVec` and `AccumulateVec` to reduce heap allocations
2150 during interning of slices][37270]
2151 * [Optimize `write_metadata`][37267]
2152 * [Don't process obligation forest cycles when stalled][37231]
2153 * [Avoid many `CrateConfig` clones][37161]
2154 * [Optimize `Substs::super_fold_with`][37108]
2155 * [Optimize `ObligationForest`'s `NodeState` handling][36993]
2156 * [Speed up `plug_leaks`][36917]
2161 * [`println!()`, with no arguments, prints newline][36825].
2162 Previously, an empty string was required to achieve the same.
2163 * [`Wrapping` impls standard binary and unary operators, as well as
2164 the `Sum` and `Product` iterators][37356]
2165 * [Implement `From<Cow<str>> for String` and `From<Cow<[T]>> for
2167 * [Improve `fold` performance for `chain`, `cloned`, `map`, and
2168 `VecDeque` iterators][37315]
2169 * [Improve `SipHasher` performance on small values][37312]
2170 * [Add Iterator trait TrustedLen to enable better FromIterator /
2172 * [Expand `.zip()` specialization to `.map()` and `.cloned()`][37230]
2173 * [`ReadDir` implements `Debug`][37221]
2174 * [Implement `RefUnwindSafe` for atomic types][37178]
2175 * [Specialize `Vec::extend` to `Vec::extend_from_slice`][37094]
2176 * [Avoid allocations in `Decoder::read_str`][37064]
2177 * [`io::Error` implements `From<io::ErrorKind>`][37037]
2178 * [Impl `Debug` for raw pointers to unsized data][36880]
2179 * [Don't reuse `HashMap` random seeds][37470]
2180 * [The internal memory layout of `HashMap` is more cache-friendly, for
2181 significant improvements in some operations][36692]
2182 * [`HashMap` uses less memory on 32-bit architectures][36595]
2183 * [Impl `Add<{str, Cow<str>}>` for `Cow<str>`][36430]
2188 * [Expose rustc cfg values to build scripts][cargo/3243]
2189 * [Allow cargo to work with read-only `CARGO_HOME`][cargo/3259]
2190 * [Fix passing --features when testing multiple packages][cargo/3280]
2191 * [Use a single profile set per workspace][cargo/3249]
2192 * [Load `replace` sections from lock files][cargo/3220]
2193 * [Ignore `panic` configuration for test/bench profiles][cargo/3175]
2198 * [rustup is the recommended Rust installation method][1.14rustup]
2199 * This release includes host (rustc) builds for Linux on MIPS, PowerPC, and
2200 S390x. These are [tier 2] platforms and may have major defects. Follow the
2201 instructions on the website to install, or add the targets to an existing
2202 installation with `rustup target add`. The new target triples are:
2203 - `mips-unknown-linux-gnu`
2204 - `mipsel-unknown-linux-gnu`
2205 - `mips64-unknown-linux-gnuabi64`
2206 - `mips64el-unknown-linux-gnuabi64 `
2207 - `powerpc-unknown-linux-gnu`
2208 - `powerpc64-unknown-linux-gnu`
2209 - `powerpc64le-unknown-linux-gnu`
2210 - `s390x-unknown-linux-gnu `
2211 * This release includes target (std) builds for ARM Linux running MUSL
2212 libc. These are [tier 2] platforms and may have major defects. Add the
2213 following triples to an existing rustup installation with `rustup target add`:
2214 - `arm-unknown-linux-musleabi`
2215 - `arm-unknown-linux-musleabihf`
2216 - `armv7-unknown-linux-musleabihf`
2217 * This release includes [experimental support for WebAssembly][1.14wasm], via
2218 the `wasm32-unknown-emscripten` target. This target is known to have major
2219 defects. Please test, report, and fix.
2220 * rustup no longer installs documentation by default. Run `rustup
2221 component add rust-docs` to install.
2222 * [Fix line stepping in debugger][37310]
2223 * [Enable line number debuginfo in releases][37280]
2228 * [Disable jemalloc on aarch64/powerpc/mips][37392]
2229 * [Add support for Fuchsia OS][37313]
2230 * [Detect local-rebuild by only MAJOR.MINOR version][37273]
2235 * [A number of forward-compatibility lints used by the compiler
2236 to gradually introduce language changes have been converted
2237 to deny by default][36894]:
2238 - ["use of inaccessible extern crate erroneously allowed"][36886]
2239 - ["type parameter default erroneously allowed in invalid location"][36887]
2240 - ["detects super or self keywords at the beginning of global path"][36888]
2241 - ["two overlapping inherent impls define an item with the same name
2242 were erroneously allowed"][36889]
2243 - ["floating-point constants cannot be used in patterns"][36890]
2244 - ["constants of struct or enum type can only be used in a pattern if
2245 the struct or enum has `#[derive(PartialEq, Eq)]`"][36891]
2246 - ["lifetimes or labels named `'_` were erroneously allowed"][36892]
2247 * [Prohibit patterns in trait methods without bodies][37378]
2248 * [The atomic `Ordering` enum may not be matched exhaustively][37351]
2249 * [Future-proofing `#[no_link]` breaks some obscure cases][37247]
2250 * [The `$crate` macro variable is accepted in fewer locations][37213]
2251 * [Impls specifying extra region requirements beyond the trait
2252 they implement are rejected][37167]
2253 * [Enums may not be unsized][37111]. Unsized enums are intended to
2254 work but never have. For now they are forbidden.
2255 * [Enforce the shadowing restrictions from RFC 1560 for today's macros][36767]
2257 [tier 2]: https://forge.rust-lang.org/platform-support.html
2258 [1.14rustup]: https://internals.rust-lang.org/t/beta-testing-rustup-rs/3316/204
2259 [1.14wasm]: https://users.rust-lang.org/t/compiling-to-the-web-with-rust-and-emscripten/7627
2260 [36430]: https://github.com/rust-lang/rust/pull/36430
2261 [36595]: https://github.com/rust-lang/rust/pull/36595
2262 [36595]: https://github.com/rust-lang/rust/pull/36595
2263 [36692]: https://github.com/rust-lang/rust/pull/36692
2264 [36767]: https://github.com/rust-lang/rust/pull/36767
2265 [36794]: https://github.com/rust-lang/rust/pull/36794
2266 [36798]: https://github.com/rust-lang/rust/pull/36798
2267 [36819]: https://github.com/rust-lang/rust/pull/36819
2268 [36822]: https://github.com/rust-lang/rust/pull/36822
2269 [36825]: https://github.com/rust-lang/rust/pull/36825
2270 [36843]: https://github.com/rust-lang/rust/pull/36843
2271 [36880]: https://github.com/rust-lang/rust/pull/36880
2272 [36886]: https://github.com/rust-lang/rust/issues/36886
2273 [36887]: https://github.com/rust-lang/rust/issues/36887
2274 [36888]: https://github.com/rust-lang/rust/issues/36888
2275 [36889]: https://github.com/rust-lang/rust/issues/36889
2276 [36890]: https://github.com/rust-lang/rust/issues/36890
2277 [36891]: https://github.com/rust-lang/rust/issues/36891
2278 [36892]: https://github.com/rust-lang/rust/issues/36892
2279 [36894]: https://github.com/rust-lang/rust/pull/36894
2280 [36917]: https://github.com/rust-lang/rust/pull/36917
2281 [36993]: https://github.com/rust-lang/rust/pull/36993
2282 [37037]: https://github.com/rust-lang/rust/pull/37037
2283 [37064]: https://github.com/rust-lang/rust/pull/37064
2284 [37094]: https://github.com/rust-lang/rust/pull/37094
2285 [37108]: https://github.com/rust-lang/rust/pull/37108
2286 [37111]: https://github.com/rust-lang/rust/pull/37111
2287 [37161]: https://github.com/rust-lang/rust/pull/37161
2288 [37162]: https://github.com/rust-lang/rust/pull/37162
2289 [37167]: https://github.com/rust-lang/rust/pull/37167
2290 [37178]: https://github.com/rust-lang/rust/pull/37178
2291 [37200]: https://github.com/rust-lang/rust/pull/37200
2292 [37213]: https://github.com/rust-lang/rust/pull/37213
2293 [37221]: https://github.com/rust-lang/rust/pull/37221
2294 [37224]: https://github.com/rust-lang/rust/pull/37224
2295 [37230]: https://github.com/rust-lang/rust/pull/37230
2296 [37231]: https://github.com/rust-lang/rust/pull/37231
2297 [37247]: https://github.com/rust-lang/rust/pull/37247
2298 [37267]: https://github.com/rust-lang/rust/pull/37267
2299 [37270]: https://github.com/rust-lang/rust/pull/37270
2300 [37273]: https://github.com/rust-lang/rust/pull/37273
2301 [37280]: https://github.com/rust-lang/rust/pull/37280
2302 [37298]: https://github.com/rust-lang/rust/pull/37298
2303 [37306]: https://github.com/rust-lang/rust/pull/37306
2304 [37310]: https://github.com/rust-lang/rust/pull/37310
2305 [37312]: https://github.com/rust-lang/rust/pull/37312
2306 [37313]: https://github.com/rust-lang/rust/pull/37313
2307 [37315]: https://github.com/rust-lang/rust/pull/37315
2308 [37318]: https://github.com/rust-lang/rust/pull/37318
2309 [37322]: https://github.com/rust-lang/rust/pull/37322
2310 [37326]: https://github.com/rust-lang/rust/pull/37326
2311 [37351]: https://github.com/rust-lang/rust/pull/37351
2312 [37356]: https://github.com/rust-lang/rust/pull/37356
2313 [37367]: https://github.com/rust-lang/rust/pull/37367
2314 [37373]: https://github.com/rust-lang/rust/pull/37373
2315 [37378]: https://github.com/rust-lang/rust/pull/37378
2316 [37389]: https://github.com/rust-lang/rust/pull/37389
2317 [37392]: https://github.com/rust-lang/rust/pull/37392
2318 [37427]: https://github.com/rust-lang/rust/pull/37427
2319 [37439]: https://github.com/rust-lang/rust/pull/37439
2320 [37445]: https://github.com/rust-lang/rust/pull/37445
2321 [37470]: https://github.com/rust-lang/rust/pull/37470
2322 [37569]: https://github.com/rust-lang/rust/pull/37569
2323 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
2324 [cargo/3175]: https://github.com/rust-lang/cargo/pull/3175
2325 [cargo/3220]: https://github.com/rust-lang/cargo/pull/3220
2326 [cargo/3243]: https://github.com/rust-lang/cargo/pull/3243
2327 [cargo/3249]: https://github.com/rust-lang/cargo/pull/3249
2328 [cargo/3259]: https://github.com/rust-lang/cargo/pull/3259
2329 [cargo/3280]: https://github.com/rust-lang/cargo/pull/3280
2332 Version 1.13.0 (2016-11-10)
2333 ===========================
2338 * [Stabilize the `?` operator][36995]. `?` is a simple way to propagate
2339 errors, like the `try!` macro, described in [RFC 0243].
2340 * [Stabilize macros in type position][36014]. Described in [RFC 873].
2341 * [Stabilize attributes on statements][36995]. Described in [RFC 0016].
2342 * [Fix `#[derive]` for empty tuple structs/variants][35728]
2343 * [Fix lifetime rules for 'if' conditions][36029]
2344 * [Avoid loading and parsing unconfigured non-inline modules][36482]
2349 * [Add the `-C link-arg` argument][36574]
2350 * [Remove the old AST-based backend from rustc_trans][35764]
2351 * [Don't enable NEON by default on armv7 Linux][35814]
2352 * [Fix debug line number info for macro expansions][35238]
2353 * [Do not emit "class method" debuginfo for types that are not
2354 DICompositeType][36008]
2355 * [Warn about multiple conflicting #[repr] hints][34623]
2356 * [When sizing DST, don't double-count nested struct prefixes][36351]
2357 * [Default RUST_MIN_STACK to 16MiB for now][36505]
2358 * [Improve rlib metadata format][36551]. Reduces rlib size significantly.
2359 * [Reject macros with empty repetitions to avoid infinite loop][36721]
2360 * [Expand macros without recursing to avoid stack overflows][36214]
2365 * [Replace macro backtraces with labeled local uses][35702]
2366 * [Improve error message for misplaced doc comments][33922]
2367 * [Buffer unix and lock windows to prevent message interleaving][35975]
2368 * [Update lifetime errors to specifically note temporaries][36171]
2369 * [Special case a few colors for Windows][36178]
2370 * [Suggest `use self` when such an import resolves][36289]
2371 * [Be more specific when type parameter shadows primitive type][36338]
2372 * Many minor improvements
2374 Compile-time Optimizations
2375 --------------------------
2377 * [Compute and cache HIR hashes at beginning][35854]
2378 * [Don't hash types in loan paths][36004]
2379 * [Cache projections in trans][35761]
2380 * [Optimize the parser's last token handling][36527]
2381 * [Only instantiate #[inline] functions in codegen units referencing
2382 them][36524]. This leads to big improvements in cases where crates export
2383 define many inline functions without using them directly.
2384 * [Lazily allocate TypedArena's first chunk][36592]
2385 * [Don't allocate during default HashSet creation][36734]
2392 * [`overflowing_abs`]
2393 * [`RefCell::try_borrow`]
2394 * [`RefCell::try_borrow_mut`]
2399 * [Add `assert_ne!` and `debug_assert_ne!`][35074]
2400 * [Make `vec_deque::Drain`, `hash_map::Drain`, and `hash_set::Drain`
2402 * [Implement `AsRef<[T]>` for `std::slice::Iter`][35559]
2403 * [Implement `Debug` for `std::vec::IntoIter`][35707]
2404 * [`CString`: avoid excessive growth just to 0-terminate][35871]
2405 * [Implement `CoerceUnsized` for `{Cell, RefCell, UnsafeCell}`][35627]
2406 * [Use arc4rand on FreeBSD][35884]
2407 * [memrchr: Correct aligned offset computation][35969]
2408 * [Improve Demangling of Rust Symbols][36059]
2409 * [Use monotonic time in condition variables][35048]
2410 * [Implement `Debug` for `std::path::{Components,Iter}`][36101]
2411 * [Implement conversion traits for `char`][35755]
2412 * [Fix illegal instruction caused by overflow in channel cloning][36104]
2413 * [Zero first byte of CString on drop][36264]
2414 * [Inherit overflow checks for sum and product][36372]
2415 * [Add missing Eq implementations][36423]
2416 * [Implement `Debug` for `DirEntry`][36631]
2417 * [When `getaddrinfo` returns `EAI_SYSTEM` retrieve actual error from
2419 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
2420 * [Implement more traits for `std::io::ErrorKind`][35911]
2421 * [Optimize BinaryHeap bounds checking][36072]
2422 * [Work around pointer aliasing issue in `Vec::extend_from_slice`,
2423 `extend_with_element`][36355]
2424 * [Fix overflow checking in unsigned pow()][34942]
2429 * This release includes security fixes to both curl and OpenSSL.
2430 * [Fix transitive doctests when panic=abort][cargo/3021]
2431 * [Add --all-features flag to cargo][cargo/3038]
2432 * [Reject path-based dependencies in `cargo package`][cargo/3060]
2433 * [Don't parse the home directory more than once][cargo/3078]
2434 * [Don't try to generate Cargo.lock on empty workspaces][cargo/3092]
2435 * [Update OpenSSL to 1.0.2j][cargo/3121]
2436 * [Add license and license_file to cargo metadata output][cargo/3110]
2437 * [Make crates-io registry URL optional in config; ignore all changes to
2438 source.crates-io][cargo/3089]
2439 * [Don't download dependencies from other platforms][cargo/3123]
2440 * [Build transitive dev-dependencies when needed][cargo/3125]
2441 * [Add support for per-target rustflags in .cargo/config][cargo/3157]
2442 * [Avoid updating registry when adding existing deps][cargo/3144]
2443 * [Warn about path overrides that won't work][cargo/3136]
2444 * [Use workspaces during `cargo install`][cargo/3146]
2445 * [Leak mspdbsrv.exe processes on Windows][cargo/3162]
2446 * [Add --message-format flag][cargo/3000]
2447 * [Pass target environment for rustdoc][cargo/3205]
2448 * [Use `CommandExt::exec` for `cargo run` on Unix][cargo/2818]
2449 * [Update curl and curl-sys][cargo/3241]
2450 * [Call rustdoc test with the correct cfg flags of a package][cargo/3242]
2455 * [rustdoc: Add the `--sysroot` argument][36586]
2456 * [rustdoc: Fix a couple of issues with the search results][35655]
2457 * [rustdoc: remove the `!` from macro URLs and titles][35234]
2458 * [gdb: Fix pretty-printing special-cased Rust types][35585]
2459 * [rustdoc: Filter more incorrect methods inherited through Deref][36266]
2464 * [Remove unmaintained style guide][35124]
2465 * [Add s390x support][36369]
2466 * [Initial work at Haiku OS support][36727]
2467 * [Add mips-uclibc targets][35734]
2468 * [Crate-ify compiler-rt into compiler-builtins][35021]
2469 * [Add rustc version info (git hash + date) to dist tarball][36213]
2470 * Many documentation improvements
2475 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
2476 * [Deny (by default) transmuting from fn item types to pointer-sized
2477 types][34923]. Continuing the long transition to zero-sized fn items,
2479 * [Fix `#[derive]` for empty tuple structs/variants][35728].
2481 * [Issue deprecation warnings for safe accesses to extern statics][36173]
2482 * [Fix lifetime rules for 'if' conditions][36029].
2483 * [Inherit overflow checks for sum and product][36372].
2484 * [Forbid user-defined macros named "macro_rules"][36730].
2486 [33922]: https://github.com/rust-lang/rust/pull/33922
2487 [34623]: https://github.com/rust-lang/rust/pull/34623
2488 [34923]: https://github.com/rust-lang/rust/pull/34923
2489 [34942]: https://github.com/rust-lang/rust/pull/34942
2490 [34982]: https://github.com/rust-lang/rust/pull/34982
2491 [35021]: https://github.com/rust-lang/rust/pull/35021
2492 [35048]: https://github.com/rust-lang/rust/pull/35048
2493 [35074]: https://github.com/rust-lang/rust/pull/35074
2494 [35124]: https://github.com/rust-lang/rust/pull/35124
2495 [35234]: https://github.com/rust-lang/rust/pull/35234
2496 [35238]: https://github.com/rust-lang/rust/pull/35238
2497 [35354]: https://github.com/rust-lang/rust/pull/35354
2498 [35559]: https://github.com/rust-lang/rust/pull/35559
2499 [35585]: https://github.com/rust-lang/rust/pull/35585
2500 [35627]: https://github.com/rust-lang/rust/pull/35627
2501 [35655]: https://github.com/rust-lang/rust/pull/35655
2502 [35702]: https://github.com/rust-lang/rust/pull/35702
2503 [35707]: https://github.com/rust-lang/rust/pull/35707
2504 [35728]: https://github.com/rust-lang/rust/pull/35728
2505 [35734]: https://github.com/rust-lang/rust/pull/35734
2506 [35755]: https://github.com/rust-lang/rust/pull/35755
2507 [35761]: https://github.com/rust-lang/rust/pull/35761
2508 [35764]: https://github.com/rust-lang/rust/pull/35764
2509 [35814]: https://github.com/rust-lang/rust/pull/35814
2510 [35854]: https://github.com/rust-lang/rust/pull/35854
2511 [35871]: https://github.com/rust-lang/rust/pull/35871
2512 [35884]: https://github.com/rust-lang/rust/pull/35884
2513 [35911]: https://github.com/rust-lang/rust/pull/35911
2514 [35969]: https://github.com/rust-lang/rust/pull/35969
2515 [35975]: https://github.com/rust-lang/rust/pull/35975
2516 [36004]: https://github.com/rust-lang/rust/pull/36004
2517 [36008]: https://github.com/rust-lang/rust/pull/36008
2518 [36014]: https://github.com/rust-lang/rust/pull/36014
2519 [36029]: https://github.com/rust-lang/rust/pull/36029
2520 [36059]: https://github.com/rust-lang/rust/pull/36059
2521 [36072]: https://github.com/rust-lang/rust/pull/36072
2522 [36101]: https://github.com/rust-lang/rust/pull/36101
2523 [36104]: https://github.com/rust-lang/rust/pull/36104
2524 [36171]: https://github.com/rust-lang/rust/pull/36171
2525 [36173]: https://github.com/rust-lang/rust/pull/36173
2526 [36178]: https://github.com/rust-lang/rust/pull/36178
2527 [36213]: https://github.com/rust-lang/rust/pull/36213
2528 [36214]: https://github.com/rust-lang/rust/pull/36214
2529 [36264]: https://github.com/rust-lang/rust/pull/36264
2530 [36266]: https://github.com/rust-lang/rust/pull/36266
2531 [36289]: https://github.com/rust-lang/rust/pull/36289
2532 [36338]: https://github.com/rust-lang/rust/pull/36338
2533 [36351]: https://github.com/rust-lang/rust/pull/36351
2534 [36355]: https://github.com/rust-lang/rust/pull/36355
2535 [36369]: https://github.com/rust-lang/rust/pull/36369
2536 [36372]: https://github.com/rust-lang/rust/pull/36372
2537 [36423]: https://github.com/rust-lang/rust/pull/36423
2538 [36482]: https://github.com/rust-lang/rust/pull/36482
2539 [36505]: https://github.com/rust-lang/rust/pull/36505
2540 [36524]: https://github.com/rust-lang/rust/pull/36524
2541 [36527]: https://github.com/rust-lang/rust/pull/36527
2542 [36551]: https://github.com/rust-lang/rust/pull/36551
2543 [36574]: https://github.com/rust-lang/rust/pull/36574
2544 [36586]: https://github.com/rust-lang/rust/pull/36586
2545 [36592]: https://github.com/rust-lang/rust/pull/36592
2546 [36631]: https://github.com/rust-lang/rust/pull/36631
2547 [36639]: https://github.com/rust-lang/rust/pull/36639
2548 [36721]: https://github.com/rust-lang/rust/pull/36721
2549 [36727]: https://github.com/rust-lang/rust/pull/36727
2550 [36730]: https://github.com/rust-lang/rust/pull/36730
2551 [36734]: https://github.com/rust-lang/rust/pull/36734
2552 [36754]: https://github.com/rust-lang/rust/pull/36754
2553 [36995]: https://github.com/rust-lang/rust/pull/36995
2554 [RFC 0016]: https://github.com/rust-lang/rfcs/blob/master/text/0016-more-attributes.md
2555 [RFC 0243]: https://github.com/rust-lang/rfcs/blob/master/text/0243-trait-based-exception-handling.md
2556 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
2557 [RFC 401]: https://github.com/rust-lang/rfcs/blob/master/text/0401-coercions.md
2558 [RFC 873]: https://github.com/rust-lang/rfcs/blob/master/text/0873-type-macros.md
2559 [cargo/2818]: https://github.com/rust-lang/cargo/pull/2818
2560 [cargo/3000]: https://github.com/rust-lang/cargo/pull/3000
2561 [cargo/3021]: https://github.com/rust-lang/cargo/pull/3021
2562 [cargo/3038]: https://github.com/rust-lang/cargo/pull/3038
2563 [cargo/3060]: https://github.com/rust-lang/cargo/pull/3060
2564 [cargo/3078]: https://github.com/rust-lang/cargo/pull/3078
2565 [cargo/3089]: https://github.com/rust-lang/cargo/pull/3089
2566 [cargo/3092]: https://github.com/rust-lang/cargo/pull/3092
2567 [cargo/3110]: https://github.com/rust-lang/cargo/pull/3110
2568 [cargo/3121]: https://github.com/rust-lang/cargo/pull/3121
2569 [cargo/3123]: https://github.com/rust-lang/cargo/pull/3123
2570 [cargo/3125]: https://github.com/rust-lang/cargo/pull/3125
2571 [cargo/3136]: https://github.com/rust-lang/cargo/pull/3136
2572 [cargo/3144]: https://github.com/rust-lang/cargo/pull/3144
2573 [cargo/3146]: https://github.com/rust-lang/cargo/pull/3146
2574 [cargo/3157]: https://github.com/rust-lang/cargo/pull/3157
2575 [cargo/3162]: https://github.com/rust-lang/cargo/pull/3162
2576 [cargo/3205]: https://github.com/rust-lang/cargo/pull/3205
2577 [cargo/3241]: https://github.com/rust-lang/cargo/pull/3241
2578 [cargo/3242]: https://github.com/rust-lang/cargo/pull/3242
2579 [rustup]: https://www.rustup.rs
2580 [`checked_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.checked_abs
2581 [`wrapping_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.wrapping_abs
2582 [`overflowing_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.overflowing_abs
2583 [`RefCell::try_borrow`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow
2584 [`RefCell::try_borrow_mut`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow_mut
2585 [`SipHasher`]: https://doc.rust-lang.org/std/hash/struct.SipHasher.html
2586 [`DefaultHasher`]: https://doc.rust-lang.org/std/collections/hash_map/struct.DefaultHasher.html
2589 Version 1.12.1 (2016-10-20)
2590 ===========================
2595 * [ICE: 'rustc' panicked at 'assertion failed: concrete_substs.is_normalized_for_trans()' #36381][36381]
2596 * [Confusion with double negation and booleans][36856]
2597 * [rustc 1.12.0 fails with SIGSEGV in release mode (syn crate 0.8.0)][36875]
2598 * [Rustc 1.12.0 Windows build of `ethcore` crate fails with LLVM error][36924]
2599 * [1.12.0: High memory usage when linking in release mode with debug info][36926]
2600 * [Corrupted memory after updated to 1.12][36936]
2601 * ["Let NullaryConstructor = something;" causes internal compiler error: "tried to overwrite interned AdtDef"][37026]
2602 * [Fix ICE: inject bitcast if types mismatch for invokes/calls/stores][37112]
2603 * [debuginfo: Handle spread_arg case in MIR-trans in a more stable way.][37153]
2605 [36381]: https://github.com/rust-lang/rust/issues/36381
2606 [36856]: https://github.com/rust-lang/rust/issues/36856
2607 [36875]: https://github.com/rust-lang/rust/issues/36875
2608 [36924]: https://github.com/rust-lang/rust/issues/36924
2609 [36926]: https://github.com/rust-lang/rust/issues/36926
2610 [36936]: https://github.com/rust-lang/rust/issues/36936
2611 [37026]: https://github.com/rust-lang/rust/issues/37026
2612 [37112]: https://github.com/rust-lang/rust/issues/37112
2613 [37153]: https://github.com/rust-lang/rust/issues/37153
2616 Version 1.12.0 (2016-09-29)
2617 ===========================
2622 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)](https://github.com/rust-lang/rust/pull/34096).
2623 This translation pass is far simpler than the previous AST->LLVM pass, and
2624 creates opportunities to perform new optimizations directly on the MIR. It
2625 was previously described [on the Rust blog](https://blog.rust-lang.org/2016/04/19/MIR.html).
2626 * [`rustc` presents a new, more readable error format, along with
2627 machine-readable JSON error output for use by IDEs](https://github.com/rust-lang/rust/pull/35401).
2628 Most common editors supporting Rust have been updated to work with it. It was
2629 previously described [on the Rust blog](https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
2634 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)](https://github.com/rust-lang/rust/pull/34096).
2635 This translation pass is far simpler than the previous AST->LLVM pass, and
2636 creates opportunities to perform new optimizations directly on the MIR. It
2637 was previously described [on the Rust blog](https://blog.rust-lang.org/2016/04/19/MIR.html).
2638 * [Print the Rust target name, not the LLVM target name, with
2639 `--print target-list`](https://github.com/rust-lang/rust/pull/35489)
2640 * [The computation of `TypeId` is correct in some cases where it was previously
2641 producing inconsistent results](https://github.com/rust-lang/rust/pull/35267)
2642 * [The `mips-unknown-linux-gnu` target uses hardware floating point by default](https://github.com/rust-lang/rust/pull/34910)
2643 * [The `rustc` arguments, `--print target-cpus`, `--print target-features`,
2644 `--print relocation-models`, and `--print code-models` print the available
2645 options to the `-C target-cpu`, `-C target-feature`, `-C relocation-model` and
2646 `-C code-model` code generation arguments](https://github.com/rust-lang/rust/pull/34845)
2647 * [`rustc` supports three new MUSL targets on ARM: `arm-unknown-linux-musleabi`,
2648 `arm-unknown-linux-musleabihf`, and `armv7-unknown-linux-musleabihf`](https://github.com/rust-lang/rust/pull/35060).
2649 These targets produce statically-linked binaries. There are no binary release
2655 * [`rustc` presents a new, more readable error format, along with
2656 machine-readable JSON error output for use by IDEs](https://github.com/rust-lang/rust/pull/35401).
2657 Most common editors supporting Rust have been updated to work with it. It was
2658 previously described [on the Rust blog](https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
2659 * [In error descriptions, references are now described in plain English,
2660 instead of as "&-ptr"](https://github.com/rust-lang/rust/pull/35611)
2661 * [In error type descriptions, unknown numeric types are named `{integer}` or
2662 `{float}` instead of `_`](https://github.com/rust-lang/rust/pull/35080)
2663 * [`rustc` emits a clearer error when inner attributes follow a doc comment](https://github.com/rust-lang/rust/pull/34676)
2668 * [`macro_rules!` invocations can be made within `macro_rules!` invocations](https://github.com/rust-lang/rust/pull/34925)
2669 * [`macro_rules!` meta-variables are hygienic](https://github.com/rust-lang/rust/pull/35453)
2670 * [`macro_rules!` `tt` matchers can be reparsed correctly, making them much more
2671 useful](https://github.com/rust-lang/rust/pull/34908)
2672 * [`macro_rules!` `stmt` matchers correctly consume the entire contents when
2673 inside non-braces invocations](https://github.com/rust-lang/rust/pull/34886)
2674 * [Semicolons are properly required as statement delimiters inside
2675 `macro_rules!` invocations](https://github.com/rust-lang/rust/pull/34660)
2676 * [`cfg_attr` works on `path` attributes](https://github.com/rust-lang/rust/pull/34546)
2681 * [`Cell::as_ptr`](https://doc.rust-lang.org/std/cell/struct.Cell.html#method.as_ptr)
2682 * [`RefCell::as_ptr`](https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.as_ptr)
2683 * [`IpAddr::is_unspecified`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_unspecified)
2684 * [`IpAddr::is_loopback`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_loopback)
2685 * [`IpAddr::is_multicast`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_multicast)
2686 * [`Ipv4Addr::is_unspecified`](https://doc.rust-lang.org/std/net/struct.Ipv4Addr.html#method.is_unspecified)
2687 * [`Ipv6Addr::octets`](https://doc.rust-lang.org/std/net/struct.Ipv6Addr.html#method.octets)
2688 * [`LinkedList::contains`](https://doc.rust-lang.org/std/collections/linked_list/struct.LinkedList.html#method.contains)
2689 * [`VecDeque::contains`](https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.contains)
2690 * [`ExitStatusExt::from_raw`](https://doc.rust-lang.org/std/os/unix/process/trait.ExitStatusExt.html#tymethod.from_raw).
2691 Both on Unix and Windows.
2692 * [`Receiver::recv_timeout`](https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.recv_timeout)
2693 * [`RecvTimeoutError`](https://doc.rust-lang.org/std/sync/mpsc/enum.RecvTimeoutError.html)
2694 * [`BinaryHeap::peek_mut`](https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.peek_mut)
2695 * [`PeekMut`](https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html)
2696 * [`iter::Product`](https://doc.rust-lang.org/std/iter/trait.Product.html)
2697 * [`iter::Sum`](https://doc.rust-lang.org/std/iter/trait.Sum.html)
2698 * [`OccupiedEntry::remove_entry`](https://doc.rust-lang.org/std/collections/btree_map/struct.OccupiedEntry.html#method.remove_entry)
2699 * [`VacantEntry::into_key`](https://doc.rust-lang.org/std/collections/btree_map/struct.VacantEntry.html#method.into_key)
2704 * [The `format!` macro and friends now allow a single argument to be formatted
2705 in multiple styles](https://github.com/rust-lang/rust/pull/33642)
2706 * [The lifetime bounds on `[T]::binary_search_by` and
2707 `[T]::binary_search_by_key` have been adjusted to be more flexible](https://github.com/rust-lang/rust/pull/34762)
2708 * [`Option` implements `From` for its contained type](https://github.com/rust-lang/rust/pull/34828)
2709 * [`Cell`, `RefCell` and `UnsafeCell` implement `From` for their contained type](https://github.com/rust-lang/rust/pull/35392)
2710 * [`RwLock` panics if the reader count overflows](https://github.com/rust-lang/rust/pull/35378)
2711 * [`vec_deque::Drain`, `hash_map::Drain` and `hash_set::Drain` are covariant](https://github.com/rust-lang/rust/pull/35354)
2712 * [`vec::Drain` and `binary_heap::Drain` are covariant](https://github.com/rust-lang/rust/pull/34951)
2713 * [`Cow<str>` implements `FromIterator` for `char`, `&str` and `String`](https://github.com/rust-lang/rust/pull/35064)
2714 * [Sockets on Linux are correctly closed in subprocesses via `SOCK_CLOEXEC`](https://github.com/rust-lang/rust/pull/34946)
2715 * [`hash_map::Entry`, `hash_map::VacantEntry` and `hash_map::OccupiedEntry`
2716 implement `Debug`](https://github.com/rust-lang/rust/pull/34937)
2717 * [`btree_map::Entry`, `btree_map::VacantEntry` and `btree_map::OccupiedEntry`
2718 implement `Debug`](https://github.com/rust-lang/rust/pull/34885)
2719 * [`String` implements `AddAssign`](https://github.com/rust-lang/rust/pull/34890)
2720 * [Variadic `extern fn` pointers implement the `Clone`, `PartialEq`, `Eq`,
2721 `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and `fmt::Debug` traits](https://github.com/rust-lang/rust/pull/34879)
2722 * [`FileType` implements `Debug`](https://github.com/rust-lang/rust/pull/34757)
2723 * [References to `Mutex` and `RwLock` are unwind-safe](https://github.com/rust-lang/rust/pull/34756)
2724 * [`mpsc::sync_channel` `Receiver`s return any available message before
2725 reporting a disconnect](https://github.com/rust-lang/rust/pull/34731)
2726 * [Unicode definitions have been updated to 9.0](https://github.com/rust-lang/rust/pull/34599)
2727 * [`env` iterators implement `DoubleEndedIterator`](https://github.com/rust-lang/rust/pull/33312)
2732 * [Support local mirrors of registries](https://github.com/rust-lang/cargo/pull/2857)
2733 * [Add support for command aliases](https://github.com/rust-lang/cargo/pull/2679)
2734 * [Allow `opt-level="s"` / `opt-level="z"` in profile overrides](https://github.com/rust-lang/cargo/pull/3007)
2735 * [Make `cargo doc --open --target` work as expected](https://github.com/rust-lang/cargo/pull/2988)
2736 * [Speed up noop registry updates](https://github.com/rust-lang/cargo/pull/2974)
2737 * [Update OpenSSL](https://github.com/rust-lang/cargo/pull/2971)
2738 * [Fix `--panic=abort` with plugins](https://github.com/rust-lang/cargo/pull/2954)
2739 * [Always pass `-C metadata` to the compiler](https://github.com/rust-lang/cargo/pull/2946)
2740 * [Fix depending on git repos with workspaces](https://github.com/rust-lang/cargo/pull/2938)
2741 * [Add a `--lib` flag to `cargo new`](https://github.com/rust-lang/cargo/pull/2921)
2742 * [Add `http.cainfo` for custom certs](https://github.com/rust-lang/cargo/pull/2917)
2743 * [Indicate the compilation profile after compiling](https://github.com/rust-lang/cargo/pull/2909)
2744 * [Allow enabling features for dependencies with `--features`](https://github.com/rust-lang/cargo/pull/2876)
2745 * [Add `--jobs` flag to `cargo package`](https://github.com/rust-lang/cargo/pull/2867)
2746 * [Add `--dry-run` to `cargo publish`](https://github.com/rust-lang/cargo/pull/2849)
2747 * [Add support for `RUSTDOCFLAGS`](https://github.com/rust-lang/cargo/pull/2794)
2752 * [`panic::catch_unwind` is more optimized](https://github.com/rust-lang/rust/pull/35444)
2753 * [`panic::catch_unwind` no longer accesses thread-local storage on entry](https://github.com/rust-lang/rust/pull/34866)
2758 * [Test binaries now support a `--test-threads` argument to specify the number
2759 of threads used to run tests, and which acts the same as the
2760 `RUST_TEST_THREADS` environment variable](https://github.com/rust-lang/rust/pull/35414)
2761 * [The test runner now emits a warning when tests run over 60 seconds](https://github.com/rust-lang/rust/pull/35405)
2762 * [rustdoc: Fix methods in search results](https://github.com/rust-lang/rust/pull/34752)
2763 * [`rust-lldb` warns about unsupported versions of LLDB](https://github.com/rust-lang/rust/pull/34646)
2764 * [Rust releases now come with source packages that can be installed by rustup
2765 via `rustup component add rust-src`](https://github.com/rust-lang/rust/pull/34366).
2766 The resulting source code can be used by tools and IDES, located in the
2767 sysroot under `lib/rustlib/src`.
2772 * [The compiler can now be built against LLVM 3.9](https://github.com/rust-lang/rust/pull/35594)
2773 * Many minor improvements to the documentation.
2774 * [The Rust exception handling "personality" routine is now written in Rust](https://github.com/rust-lang/rust/pull/34832)
2779 * [When printing Windows `OsStr`s, unpaired surrogate codepoints are escaped
2780 with the lowercase format instead of the uppercase](https://github.com/rust-lang/rust/pull/35084)
2781 * [When formatting strings, if "precision" is specified, the "fill",
2782 "align" and "width" specifiers are no longer ignored](https://github.com/rust-lang/rust/pull/34544)
2783 * [The `Debug` impl for strings no longer escapes all non-ASCII characters](https://github.com/rust-lang/rust/pull/34485)
2786 Version 1.11.0 (2016-08-18)
2787 ===========================
2792 * [`cfg_attr` works on `path` attributes](https://github.com/rust-lang/rust/pull/34546)
2793 * [Support nested `cfg_attr` attributes](https://github.com/rust-lang/rust/pull/34216)
2794 * [Allow statement-generating braced macro invocations at the end of blocks](https://github.com/rust-lang/rust/pull/34436)
2795 * [Macros can be expanded inside of trait definitions](https://github.com/rust-lang/rust/pull/34213)
2796 * [`#[macro_use]` works properly when it is itself expanded from a macro](https://github.com/rust-lang/rust/pull/34032)
2801 * [`BinaryHeap::append`](https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.append)
2802 * [`BTreeMap::append`](https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.append)
2803 * [`BTreeMap::split_off`](https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.split_off)
2804 * [`BTreeSet::append`](https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.append)
2805 * [`BTreeSet::split_off`](https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.split_off)
2806 * [`f32::to_degrees`](https://doc.rust-lang.org/std/primitive.f32.html#method.to_degrees)
2807 (in libcore - previously stabilized in libstd)
2808 * [`f32::to_radians`](https://doc.rust-lang.org/std/primitive.f32.html#method.to_radians)
2809 (in libcore - previously stabilized in libstd)
2810 * [`f64::to_degrees`](https://doc.rust-lang.org/std/primitive.f64.html#method.to_degrees)
2811 (in libcore - previously stabilized in libstd)
2812 * [`f64::to_radians`](https://doc.rust-lang.org/std/primitive.f64.html#method.to_radians)
2813 (in libcore - previously stabilized in libstd)
2814 * [`Iterator::sum`](https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
2815 * [`Iterator::product`](https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
2816 * [`Cell::get_mut`](https://doc.rust-lang.org/std/cell/struct.Cell.html#method.get_mut)
2817 * [`RefCell::get_mut`](https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.get_mut)
2822 * [The `thread_local!` macro supports multiple definitions in a single
2823 invocation, and can apply attributes](https://github.com/rust-lang/rust/pull/34077)
2824 * [`Cow` implements `Default`](https://github.com/rust-lang/rust/pull/34305)
2825 * [`Wrapping` implements binary, octal, lower-hex and upper-hex
2826 `Display` formatting](https://github.com/rust-lang/rust/pull/34190)
2827 * [The range types implement `Hash`](https://github.com/rust-lang/rust/pull/34180)
2828 * [`lookup_host` ignores unknown address types](https://github.com/rust-lang/rust/pull/34067)
2829 * [`assert_eq!` accepts a custom error message, like `assert!` does](https://github.com/rust-lang/rust/pull/33976)
2830 * [The main thread is now called "main" instead of "<main>"](https://github.com/rust-lang/rust/pull/33803)
2835 * [Disallow specifying features of transitive deps](https://github.com/rust-lang/cargo/pull/2821)
2836 * [Add color support for Windows consoles](https://github.com/rust-lang/cargo/pull/2804)
2837 * [Fix `harness = false` on `[lib]` sections](https://github.com/rust-lang/cargo/pull/2795)
2838 * [Don't panic when `links` contains a '.'](https://github.com/rust-lang/cargo/pull/2787)
2839 * [Build scripts can emit warnings](https://github.com/rust-lang/cargo/pull/2630),
2840 and `-vv` prints warnings for all crates.
2841 * [Ignore file locks on OS X NFS mounts](https://github.com/rust-lang/cargo/pull/2720)
2842 * [Don't warn about `package.metadata` keys](https://github.com/rust-lang/cargo/pull/2668).
2843 This provides room for expansion by arbitrary tools.
2844 * [Add support for cdylib crate types](https://github.com/rust-lang/cargo/pull/2741)
2845 * [Prevent publishing crates when files are dirty](https://github.com/rust-lang/cargo/pull/2781)
2846 * [Don't fetch all crates on clean](https://github.com/rust-lang/cargo/pull/2704)
2847 * [Propagate --color option to rustc](https://github.com/rust-lang/cargo/pull/2779)
2848 * [Fix `cargo doc --open` on Windows](https://github.com/rust-lang/cargo/pull/2780)
2849 * [Improve autocompletion](https://github.com/rust-lang/cargo/pull/2772)
2850 * [Configure colors of stderr as well as stdout](https://github.com/rust-lang/cargo/pull/2739)
2855 * [Caching projections speeds up type check dramatically for some
2856 workloads](https://github.com/rust-lang/rust/pull/33816)
2857 * [The default `HashMap` hasher is SipHash 1-3 instead of SipHash 2-4](https://github.com/rust-lang/rust/pull/33940)
2858 This hasher is faster, but is believed to provide sufficient
2859 protection from collision attacks.
2860 * [Comparison of `Ipv4Addr` is 10x faster](https://github.com/rust-lang/rust/pull/33891)
2865 * [Fix empty implementation section on some module pages](https://github.com/rust-lang/rust/pull/34536)
2866 * [Fix inlined renamed re-exports in import lists](https://github.com/rust-lang/rust/pull/34479)
2867 * [Fix search result layout for enum variants and struct fields](https://github.com/rust-lang/rust/pull/34477)
2868 * [Fix issues with source links to external crates](https://github.com/rust-lang/rust/pull/34387)
2869 * [Fix redirect pages for renamed re-exports](https://github.com/rust-lang/rust/pull/34245)
2874 * [rustc is better at finding the MSVC toolchain](https://github.com/rust-lang/rust/pull/34492)
2875 * [When emitting debug info, rustc emits frame pointers for closures,
2876 shims and glue, as it does for all other functions](https://github.com/rust-lang/rust/pull/33909)
2877 * [rust-lldb warns about unsupported versions of LLDB](https://github.com/rust-lang/rust/pull/34646)
2878 * Many more errors have been given error codes and extended
2880 * API documentation continues to be improved, with many new examples
2885 * [rustc no longer hangs when dependencies recursively re-export
2886 submodules](https://github.com/rust-lang/rust/pull/34542)
2887 * [rustc requires LLVM 3.7+](https://github.com/rust-lang/rust/pull/34104)
2888 * [The 'How Safe and Unsafe Interact' chapter of The Rustonomicon was
2889 rewritten](https://github.com/rust-lang/rust/pull/33895)
2890 * [rustc support 16-bit pointer sizes](https://github.com/rust-lang/rust/pull/33460).
2891 No targets use this yet, but it works toward AVR support.
2896 * [`const`s and `static`s may not have unsized types](https://github.com/rust-lang/rust/pull/34443)
2897 * [The new follow-set rules that place restrictions on `macro_rules!`
2898 in order to ensure syntax forward-compatibility have been enabled](https://github.com/rust-lang/rust/pull/33982)
2899 This was an [amendment to RFC 550](https://github.com/rust-lang/rfcs/pull/1384),
2900 and has been a warning since 1.10.
2901 * [`cfg` attribute process has been refactored to fix various bugs](https://github.com/rust-lang/rust/pull/33706).
2902 This causes breakage in some corner cases.
2905 Version 1.10.0 (2016-07-07)
2906 ===========================
2911 * [Allow `concat_idents!` in type positions as well as in expression
2912 positions](https://github.com/rust-lang/rust/pull/33735).
2913 * [`Copy` types are required to have a trivial implementation of `Clone`](https://github.com/rust-lang/rust/pull/33420).
2914 [RFC 1521](https://github.com/rust-lang/rfcs/blob/master/text/1521-copy-clone-semantics.md).
2915 * [Single-variant enums support the `#[repr(..)]` attribute](https://github.com/rust-lang/rust/pull/33355).
2916 * [Fix `#[derive(RustcEncodable)]` in the presence of other `encode` methods](https://github.com/rust-lang/rust/pull/32908).
2917 * [`panic!` can be converted to a runtime abort with the
2918 `-C panic=abort` flag](https://github.com/rust-lang/rust/pull/32900).
2919 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
2920 * [Add a new crate type, 'cdylib'](https://github.com/rust-lang/rust/pull/33553).
2921 cdylibs are dynamic libraries suitable for loading by non-Rust hosts.
2922 [RFC 1510](https://github.com/rust-lang/rfcs/blob/master/text/1510-rdylib.md).
2923 Note that Cargo does not yet directly support cdylibs.
2928 * `os::windows::fs::OpenOptionsExt::access_mode`
2929 * `os::windows::fs::OpenOptionsExt::share_mode`
2930 * `os::windows::fs::OpenOptionsExt::custom_flags`
2931 * `os::windows::fs::OpenOptionsExt::attributes`
2932 * `os::windows::fs::OpenOptionsExt::security_qos_flags`
2933 * `os::unix::fs::OpenOptionsExt::custom_flags`
2934 * [`sync::Weak::new`](http://doc.rust-lang.org/alloc/arc/struct.Weak.html#method.new)
2935 * `Default for sync::Weak`
2936 * [`panic::set_hook`](http://doc.rust-lang.org/std/panic/fn.set_hook.html)
2937 * [`panic::take_hook`](http://doc.rust-lang.org/std/panic/fn.take_hook.html)
2938 * [`panic::PanicInfo`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html)
2939 * [`panic::PanicInfo::payload`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.payload)
2940 * [`panic::PanicInfo::location`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.location)
2941 * [`panic::Location`](http://doc.rust-lang.org/std/panic/struct.Location.html)
2942 * [`panic::Location::file`](http://doc.rust-lang.org/std/panic/struct.Location.html#method.file)
2943 * [`panic::Location::line`](http://doc.rust-lang.org/std/panic/struct.Location.html#method.line)
2944 * [`ffi::CStr::from_bytes_with_nul`](http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul)
2945 * [`ffi::CStr::from_bytes_with_nul_unchecked`](http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul_unchecked)
2946 * [`ffi::FromBytesWithNulError`](http://doc.rust-lang.org/std/ffi/struct.FromBytesWithNulError.html)
2947 * [`fs::Metadata::modified`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.modified)
2948 * [`fs::Metadata::accessed`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.accessed)
2949 * [`fs::Metadata::created`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.created)
2950 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange`
2951 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange_weak`
2952 * `collections::{btree,hash}_map::{Occupied,Vacant,}Entry::key`
2953 * `os::unix::net::{UnixStream, UnixListener, UnixDatagram, SocketAddr}`
2954 * [`SocketAddr::is_unnamed`](http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.is_unnamed)
2955 * [`SocketAddr::as_pathname`](http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.as_pathname)
2956 * [`UnixStream::connect`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.connect)
2957 * [`UnixStream::pair`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.pair)
2958 * [`UnixStream::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.try_clone)
2959 * [`UnixStream::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.local_addr)
2960 * [`UnixStream::peer_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.peer_addr)
2961 * [`UnixStream::set_read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
2962 * [`UnixStream::set_write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
2963 * [`UnixStream::read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
2964 * [`UnixStream::write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
2965 * [`UnixStream::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.set_nonblocking)
2966 * [`UnixStream::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.take_error)
2967 * [`UnixStream::shutdown`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.shutdown)
2968 * Read/Write/RawFd impls for `UnixStream`
2969 * [`UnixListener::bind`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.bind)
2970 * [`UnixListener::accept`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.accept)
2971 * [`UnixListener::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.try_clone)
2972 * [`UnixListener::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.local_addr)
2973 * [`UnixListener::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.set_nonblocking)
2974 * [`UnixListener::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.take_error)
2975 * [`UnixListener::incoming`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.incoming)
2976 * RawFd impls for `UnixListener`
2977 * [`UnixDatagram::bind`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.bind)
2978 * [`UnixDatagram::unbound`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.unbound)
2979 * [`UnixDatagram::pair`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.pair)
2980 * [`UnixDatagram::connect`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.connect)
2981 * [`UnixDatagram::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.try_clone)
2982 * [`UnixDatagram::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.local_addr)
2983 * [`UnixDatagram::peer_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.peer_addr)
2984 * [`UnixDatagram::recv_from`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv_from)
2985 * [`UnixDatagram::recv`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv)
2986 * [`UnixDatagram::send_to`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send_to)
2987 * [`UnixDatagram::send`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send)
2988 * [`UnixDatagram::set_read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_read_timeout)
2989 * [`UnixDatagram::set_write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_write_timeout)
2990 * [`UnixDatagram::read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.read_timeout)
2991 * [`UnixDatagram::write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.write_timeout)
2992 * [`UnixDatagram::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_nonblocking)
2993 * [`UnixDatagram::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.take_error)
2994 * [`UnixDatagram::shutdown`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.shutdown)
2995 * RawFd impls for `UnixDatagram`
2996 * `{BTree,Hash}Map::values_mut`
2997 * [`<[_]>::binary_search_by_key`](http://doc.rust-lang.org/beta/std/primitive.slice.html#method.binary_search_by_key)
3002 * [The `abs_sub` method of floats is deprecated](https://github.com/rust-lang/rust/pull/33664).
3003 The semantics of this minor method are subtle and probably not what
3005 * [Add implementation of Ord for Cell<T> and RefCell<T> where T: Ord](https://github.com/rust-lang/rust/pull/33306).
3006 * [On Linux, if `HashMap`s can't be initialized with `getrandom` they
3007 will fall back to `/dev/urandom` temporarily to avoid blocking
3008 during early boot](https://github.com/rust-lang/rust/pull/33086).
3009 * [Implemented negation for wrapping numerals](https://github.com/rust-lang/rust/pull/33067).
3010 * [Implement `Clone` for `binary_heap::IntoIter`](https://github.com/rust-lang/rust/pull/33050).
3011 * [Implement `Display` and `Hash` for `std::num::Wrapping`](https://github.com/rust-lang/rust/pull/33023).
3012 * [Add `Default` implementation for `&CStr`, `CString`](https://github.com/rust-lang/rust/pull/32990).
3013 * [Implement `From<Vec<T>>` and `Into<Vec<T>>` for `VecDeque<T>`](https://github.com/rust-lang/rust/pull/32866).
3014 * [Implement `Default` for `UnsafeCell`, `fmt::Error`, `Condvar`,
3015 `Mutex`, `RwLock`](https://github.com/rust-lang/rust/pull/32785).
3019 * [Cargo.toml supports the `profile.*.panic` option](https://github.com/rust-lang/cargo/pull/2687).
3020 This controls the runtime behavior of the `panic!` macro
3021 and can be either "unwind" (the default), or "abort".
3022 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
3023 * [Don't throw away errors with `-p` arguments](https://github.com/rust-lang/cargo/pull/2723).
3024 * [Report status to stderr instead of stdout](https://github.com/rust-lang/cargo/pull/2693).
3025 * [Build scripts are passed a `CARGO_MANIFEST_LINKS` environment
3026 variable that corresponds to the `links` field of the manifest](https://github.com/rust-lang/cargo/pull/2710).
3027 * [Ban keywords from crate names](https://github.com/rust-lang/cargo/pull/2707).
3028 * [Canonicalize `CARGO_HOME` on Windows](https://github.com/rust-lang/cargo/pull/2604).
3029 * [Retry network requests](https://github.com/rust-lang/cargo/pull/2396).
3030 By default they are retried twice, which can be customized with the
3031 `net.retry` value in `.cargo/config`.
3032 * [Don't print extra error info for failing subcommands](https://github.com/rust-lang/cargo/pull/2674).
3033 * [Add `--force` flag to `cargo install`](https://github.com/rust-lang/cargo/pull/2405).
3034 * [Don't use `flock` on NFS mounts](https://github.com/rust-lang/cargo/pull/2623).
3035 * [Prefer building `cargo install` artifacts in temporary directories](https://github.com/rust-lang/cargo/pull/2610).
3036 Makes it possible to install multiple crates in parallel.
3037 * [Add `cargo test --doc`](https://github.com/rust-lang/cargo/pull/2578).
3038 * [Add `cargo --explain`](https://github.com/rust-lang/cargo/pull/2551).
3039 * [Don't print warnings when `-q` is passed](https://github.com/rust-lang/cargo/pull/2576).
3040 * [Add `cargo doc --lib` and `--bin`](https://github.com/rust-lang/cargo/pull/2577).
3041 * [Don't require build script output to be UTF-8](https://github.com/rust-lang/cargo/pull/2560).
3042 * [Correctly attempt multiple git usernames](https://github.com/rust-lang/cargo/pull/2584).
3047 * [rustc memory usage was reduced by refactoring the context used for
3048 type checking](https://github.com/rust-lang/rust/pull/33425).
3049 * [Speed up creation of `HashMap`s by caching the random keys used
3050 to initialize the hash state](https://github.com/rust-lang/rust/pull/33318).
3051 * [The `find` implementation for `Chain` iterators is 2x faster](https://github.com/rust-lang/rust/pull/33289).
3052 * [Trait selection optimizations speed up type checking by 15%](https://github.com/rust-lang/rust/pull/33138).
3053 * [Efficient trie lookup for boolean Unicode properties](https://github.com/rust-lang/rust/pull/33098).
3054 10x faster than the previous lookup tables.
3055 * [Special case `#[derive(Copy, Clone)]` to avoid bloat](https://github.com/rust-lang/rust/pull/31414).
3060 * Many incremental improvements to documentation and rustdoc.
3061 * [rustdoc: List blanket trait impls](https://github.com/rust-lang/rust/pull/33514).
3062 * [rustdoc: Clean up ABI rendering](https://github.com/rust-lang/rust/pull/33151).
3063 * [Indexing with the wrong type produces a more informative error](https://github.com/rust-lang/rust/pull/33401).
3064 * [Improve diagnostics for constants being used in irrefutable patterns](https://github.com/rust-lang/rust/pull/33406).
3065 * [When many method candidates are in scope limit the suggestions to 10](https://github.com/rust-lang/rust/pull/33338).
3066 * [Remove confusing suggestion when calling a `fn` type](https://github.com/rust-lang/rust/pull/33325).
3067 * [Do not suggest changing `&mut self` to `&mut mut self`](https://github.com/rust-lang/rust/pull/33319).
3072 * [Update i686-linux-android features to match Android ABI](https://github.com/rust-lang/rust/pull/33651).
3073 * [Update aarch64-linux-android features to match Android ABI](https://github.com/rust-lang/rust/pull/33500).
3074 * [`std` no longer prints backtraces on platforms where the running
3075 module must be loaded with `env::current_exe`, which can't be relied
3076 on](https://github.com/rust-lang/rust/pull/33554).
3077 * This release includes std binaries for the i586-unknown-linux-gnu,
3078 i686-unknown-linux-musl, and armv7-linux-androideabi targets. The
3079 i586 target is for old x86 hardware without SSE2, and the armv7
3080 target is for Android running on modern ARM architectures.
3081 * [The `rust-gdb` and `rust-lldb` scripts are distributed on all
3082 Unix platforms](https://github.com/rust-lang/rust/pull/32835).
3083 * [On Unix the runtime aborts by calling `libc::abort` instead of
3084 generating an illegal instruction](https://github.com/rust-lang/rust/pull/31457).
3085 * [Rust is now bootstrapped from the previous release of Rust,
3086 instead of a snapshot from an arbitrary commit](https://github.com/rust-lang/rust/pull/32942).
3091 * [`AtomicBool` is now bool-sized, not word-sized](https://github.com/rust-lang/rust/pull/33579).
3092 * [`target_env` for Linux ARM targets is just `gnu`, not
3093 `gnueabihf`, `gnueabi`, etc](https://github.com/rust-lang/rust/pull/33403).
3094 * [Consistently panic on overflow in `Duration::new`](https://github.com/rust-lang/rust/pull/33072).
3095 * [Change `String::truncate` to panic less](https://github.com/rust-lang/rust/pull/32977).
3096 * [Add `:block` to the follow set for `:ty` and `:path`](https://github.com/rust-lang/rust/pull/32945).
3097 Affects how macros are parsed.
3098 * [Fix macro hygiene bug](https://github.com/rust-lang/rust/pull/32923).
3099 * [Feature-gated attributes on macro-generated macro invocations are
3100 now rejected](https://github.com/rust-lang/rust/pull/32791).
3101 * [Suppress fallback and ambiguity errors during type inference](https://github.com/rust-lang/rust/pull/32258).
3102 This caused some minor changes to type inference.
3105 Version 1.9.0 (2016-05-26)
3106 ==========================
3111 * The `#[deprecated]` attribute when applied to an API will generate
3112 warnings when used. The warnings may be suppressed with
3113 `#[allow(deprecated)]`. [RFC 1270].
3114 * [`fn` item types are zero sized, and each `fn` names a unique
3115 type][1.9fn]. This will break code that transmutes `fn`s, so calling
3116 `transmute` on a `fn` type will generate a warning for a few cycles,
3117 then will be converted to an error.
3118 * [Field and method resolution understand visibility, so private
3119 fields and methods cannot prevent the proper use of public fields
3120 and methods][1.9fv].
3121 * [The parser considers unicode codepoints in the
3122 `PATTERN_WHITE_SPACE` category to be whitespace][1.9ws].
3128 * [`std::panic::catch_unwind`][] (renamed from `recover`)
3129 * [`std::panic::resume_unwind`][] (renamed from `propagate`)
3130 * [`std::panic::AssertUnwindSafe`][] (renamed from `AssertRecoverSafe`)
3131 * [`std::panic::UnwindSafe`][] (renamed from `RecoverSafe`)
3132 * [`str::is_char_boundary`]
3133 * [`<*const T>::as_ref`]
3134 * [`<*mut T>::as_ref`]
3135 * [`<*mut T>::as_mut`]
3136 * [`AsciiExt::make_ascii_uppercase`]
3137 * [`AsciiExt::make_ascii_lowercase`]
3138 * [`char::decode_utf16`]
3139 * [`char::DecodeUtf16`]
3140 * [`char::DecodeUtf16Error`]
3141 * [`char::DecodeUtf16Error::unpaired_surrogate`]
3142 * [`BTreeSet::take`]
3143 * [`BTreeSet::replace`]
3146 * [`HashSet::replace`]
3148 * [`OsString::with_capacity`]
3149 * [`OsString::clear`]
3150 * [`OsString::capacity`]
3151 * [`OsString::reserve`]
3152 * [`OsString::reserve_exact`]
3153 * [`OsStr::is_empty`]
3155 * [`std::os::unix::thread`]
3158 * [`JoinHandleExt::as_pthread_t`]
3159 * [`JoinHandleExt::into_pthread_t`]
3160 * [`HashSet::hasher`]
3161 * [`HashMap::hasher`]
3162 * [`CommandExt::exec`]
3163 * [`File::try_clone`]
3164 * [`SocketAddr::set_ip`]
3165 * [`SocketAddr::set_port`]
3166 * [`SocketAddrV4::set_ip`]
3167 * [`SocketAddrV4::set_port`]
3168 * [`SocketAddrV6::set_ip`]
3169 * [`SocketAddrV6::set_port`]
3170 * [`SocketAddrV6::set_flowinfo`]
3171 * [`SocketAddrV6::set_scope_id`]
3172 * [`slice::copy_from_slice`]
3173 * [`ptr::read_volatile`]
3174 * [`ptr::write_volatile`]
3175 * [`OpenOptions::create_new`]
3176 * [`TcpStream::set_nodelay`]
3177 * [`TcpStream::nodelay`]
3178 * [`TcpStream::set_ttl`]
3179 * [`TcpStream::ttl`]
3180 * [`TcpStream::set_only_v6`]
3181 * [`TcpStream::only_v6`]
3182 * [`TcpStream::take_error`]
3183 * [`TcpStream::set_nonblocking`]
3184 * [`TcpListener::set_ttl`]
3185 * [`TcpListener::ttl`]
3186 * [`TcpListener::set_only_v6`]
3187 * [`TcpListener::only_v6`]
3188 * [`TcpListener::take_error`]
3189 * [`TcpListener::set_nonblocking`]
3190 * [`UdpSocket::set_broadcast`]
3191 * [`UdpSocket::broadcast`]
3192 * [`UdpSocket::set_multicast_loop_v4`]
3193 * [`UdpSocket::multicast_loop_v4`]
3194 * [`UdpSocket::set_multicast_ttl_v4`]
3195 * [`UdpSocket::multicast_ttl_v4`]
3196 * [`UdpSocket::set_multicast_loop_v6`]
3197 * [`UdpSocket::multicast_loop_v6`]
3198 * [`UdpSocket::set_multicast_ttl_v6`]
3199 * [`UdpSocket::multicast_ttl_v6`]
3200 * [`UdpSocket::set_ttl`]
3201 * [`UdpSocket::ttl`]
3202 * [`UdpSocket::set_only_v6`]
3203 * [`UdpSocket::only_v6`]
3204 * [`UdpSocket::join_multicast_v4`]
3205 * [`UdpSocket::join_multicast_v6`]
3206 * [`UdpSocket::leave_multicast_v4`]
3207 * [`UdpSocket::leave_multicast_v6`]
3208 * [`UdpSocket::take_error`]
3209 * [`UdpSocket::connect`]
3210 * [`UdpSocket::send`]
3211 * [`UdpSocket::recv`]
3212 * [`UdpSocket::set_nonblocking`]
3217 * [`std::sync::Once` is poisoned if its initialization function
3219 * [`cell::Ref` and `cell::RefMut` can contain unsized types][1.9cu].
3220 * [Most types implement `fmt::Debug`][1.9db].
3221 * [The default buffer size used by `BufReader` and `BufWriter` was
3222 reduced to 8K, from 64K][1.9bf]. This is in line with the buffer size
3223 used by other languages.
3224 * [`Instant`, `SystemTime` and `Duration` implement `+=` and `-=`.
3225 `Duration` additionally implements `*=` and `/=`][1.9ta].
3226 * [`Skip` is a `DoubleEndedIterator`][1.9sk].
3227 * [`From<[u8; 4]>` is implemented for `Ipv4Addr`][1.9fi].
3228 * [`Chain` implements `BufRead`][1.9ch].
3229 * [`HashMap`, `HashSet` and iterators are covariant][1.9hc].
3234 * [Cargo can now run concurrently][1.9cc].
3235 * [Top-level overrides allow specific revisions of crates to be
3236 overridden through the entire crate graph][1.9ct]. This is intended
3237 to make upgrades easier for large projects, by allowing crates to be
3238 forked temporarily until they've been upgraded and republished.
3239 * [Cargo exports a `CARGO_PKG_AUTHORS` environment variable][1.9cp].
3240 * [Cargo will pass the contents of the `RUSTFLAGS` variable to `rustc`
3241 on the commandline][1.9cf]. `rustc` arguments can also be specified
3242 in the `build.rustflags` configuration key.
3247 * [The time complexity of comparing variables for equivalence during type
3248 unification is reduced from _O_(_n_!) to _O_(_n_)][1.9tu]. This leads
3249 to major compilation time improvement in some scenarios.
3250 * [`ToString` is specialized for `str`, giving it the same performance
3251 as `to_owned`][1.9ts].
3252 * [Spawning processes with `Command::output` no longer creates extra
3254 * [`#[derive(PartialEq)]` and `#[derive(PartialOrd)]` emit less code
3255 for C-like enums][1.9cl].
3260 * [Passing the `--quiet` flag to a test runner will produce
3261 much-abbreviated output][1.9q].
3262 * The Rust Project now publishes std binaries for the
3263 `mips-unknown-linux-musl`, `mipsel-unknown-linux-musl`, and
3264 `i586-pc-windows-msvc` targets.
3269 * [`std::sync::Once` is poisoned if its initialization function
3271 * [It is illegal to define methods with the same name in overlapping
3272 inherent `impl` blocks][1.9sn].
3273 * [`fn` item types are zero sized, and each `fn` names a unique
3274 type][1.9fn]. This will break code that transmutes `fn`s, so calling
3275 `transmute` on a `fn` type will generate a warning for a few cycles,
3276 then will be converted to an error.
3277 * [Improvements to const evaluation may trigger new errors when integer
3278 literals are out of range][1.9ce].
3281 [1.9bf]: https://github.com/rust-lang/rust/pull/32695
3282 [1.9cc]: https://github.com/rust-lang/cargo/pull/2486
3283 [1.9ce]: https://github.com/rust-lang/rust/pull/30587
3284 [1.9cf]: https://github.com/rust-lang/cargo/pull/2241
3285 [1.9ch]: https://github.com/rust-lang/rust/pull/32541
3286 [1.9cl]: https://github.com/rust-lang/rust/pull/31977
3287 [1.9cp]: https://github.com/rust-lang/cargo/pull/2465
3288 [1.9ct]: https://github.com/rust-lang/cargo/pull/2385
3289 [1.9cu]: https://github.com/rust-lang/rust/pull/32652
3290 [1.9db]: https://github.com/rust-lang/rust/pull/32054
3291 [1.9fi]: https://github.com/rust-lang/rust/pull/32050
3292 [1.9fn]: https://github.com/rust-lang/rust/pull/31710
3293 [1.9fv]: https://github.com/rust-lang/rust/pull/31938
3294 [1.9hc]: https://github.com/rust-lang/rust/pull/32635
3295 [1.9o]: https://github.com/rust-lang/rust/pull/32325
3296 [1.9q]: https://github.com/rust-lang/rust/pull/31887
3297 [1.9sk]: https://github.com/rust-lang/rust/pull/31700
3298 [1.9sn]: https://github.com/rust-lang/rust/pull/31925
3299 [1.9sp]: https://github.com/rust-lang/rust/pull/31618
3300 [1.9ta]: https://github.com/rust-lang/rust/pull/32448
3301 [1.9ts]: https://github.com/rust-lang/rust/pull/32586
3302 [1.9tu]: https://github.com/rust-lang/rust/pull/32062
3303 [1.9ws]: https://github.com/rust-lang/rust/pull/29734
3304 [RFC 1270]: https://github.com/rust-lang/rfcs/blob/master/text/1270-deprecation.md
3305 [`<*const T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
3306 [`<*mut T>::as_mut`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_mut
3307 [`<*mut T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
3308 [`slice::copy_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.copy_from_slice
3309 [`AsciiExt::make_ascii_lowercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_lowercase
3310 [`AsciiExt::make_ascii_uppercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_uppercase
3311 [`BTreeSet::get`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.get
3312 [`BTreeSet::replace`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.replace
3313 [`BTreeSet::take`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.take
3314 [`CommandExt::exec`]: http://doc.rust-lang.org/nightly/std/os/unix/process/trait.CommandExt.html#tymethod.exec
3315 [`File::try_clone`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html#method.try_clone
3316 [`HashMap::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.hasher
3317 [`HashSet::get`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.get
3318 [`HashSet::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.hasher
3319 [`HashSet::replace`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.replace
3320 [`HashSet::take`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.take
3321 [`JoinHandleExt::as_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.as_pthread_t
3322 [`JoinHandleExt::into_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.into_pthread_t
3323 [`JoinHandleExt`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html
3324 [`OpenOptions::create_new`]: http://doc.rust-lang.org/nightly/std/fs/struct.OpenOptions.html#method.create_new
3325 [`OsStr::is_empty`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.is_empty
3326 [`OsStr::len`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.len
3327 [`OsString::capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.capacity
3328 [`OsString::clear`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.clear
3329 [`OsString::reserve_exact`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve_exact
3330 [`OsString::reserve`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve
3331 [`OsString::with_capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.with_capacity
3332 [`RawPthread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/type.RawPthread.html
3333 [`SocketAddr::set_ip`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_ip
3334 [`SocketAddr::set_port`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_port
3335 [`SocketAddrV4::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_ip
3336 [`SocketAddrV4::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_port
3337 [`SocketAddrV6::set_flowinfo`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_flowinfo
3338 [`SocketAddrV6::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_ip
3339 [`SocketAddrV6::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_port
3340 [`SocketAddrV6::set_scope_id`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_scope_id
3341 [`TcpListener::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
3342 [`TcpListener::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
3343 [`TcpListener::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
3344 [`TcpListener::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
3345 [`TcpListener::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
3346 [`TcpListener::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
3347 [`TcpStream::nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.nodelay
3348 [`TcpStream::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
3349 [`TcpStream::set_nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nodelay
3350 [`TcpStream::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
3351 [`TcpStream::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
3352 [`TcpStream::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
3353 [`TcpStream::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
3354 [`TcpStream::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
3355 [`UdpSocket::broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.broadcast
3356 [`UdpSocket::connect`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.connect
3357 [`UdpSocket::join_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v4
3358 [`UdpSocket::join_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v6
3359 [`UdpSocket::leave_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v4
3360 [`UdpSocket::leave_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v6
3361 [`UdpSocket::multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v4
3362 [`UdpSocket::multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v6
3363 [`UdpSocket::multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v4
3364 [`UdpSocket::multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v6
3365 [`UdpSocket::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.only_v6
3366 [`UdpSocket::recv`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.recv
3367 [`UdpSocket::send`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.send
3368 [`UdpSocket::set_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_broadcast
3369 [`UdpSocket::set_multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v4
3370 [`UdpSocket::set_multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v6
3371 [`UdpSocket::set_multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v4
3372 [`UdpSocket::set_multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v6
3373 [`UdpSocket::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_nonblocking
3374 [`UdpSocket::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_only_v6
3375 [`UdpSocket::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_ttl
3376 [`UdpSocket::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.take_error
3377 [`UdpSocket::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.ttl
3378 [`char::DecodeUtf16Error::unpaired_surrogate`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html#method.unpaired_surrogate
3379 [`char::DecodeUtf16Error`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html
3380 [`char::DecodeUtf16`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16.html
3381 [`char::decode_utf16`]: http://doc.rust-lang.org/nightly/std/char/fn.decode_utf16.html
3382 [`ptr::read_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.read_volatile.html
3383 [`ptr::write_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.write_volatile.html
3384 [`std::os::unix::thread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/index.html
3385 [`std::panic::AssertUnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/struct.AssertUnwindSafe.html
3386 [`std::panic::UnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/trait.UnwindSafe.html
3387 [`std::panic::catch_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.catch_unwind.html
3388 [`std::panic::resume_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.resume_unwind.html
3389 [`std::panic`]: http://doc.rust-lang.org/nightly/std/panic/index.html
3390 [`str::is_char_boundary`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.is_char_boundary
3393 Version 1.8.0 (2016-04-14)
3394 ==========================
3399 * Rust supports overloading of compound assignment statements like
3400 `+=` by implementing the [`AddAssign`], [`SubAssign`],
3401 [`MulAssign`], [`DivAssign`], [`RemAssign`], [`BitAndAssign`],
3402 [`BitOrAssign`], [`BitXorAssign`], [`ShlAssign`], or [`ShrAssign`]
3404 * Empty structs can be defined with braces, as in `struct Foo { }`, in
3405 addition to the non-braced form, `struct Foo;`. [RFC 218].
3411 * [`str::encode_utf16`][] (renamed from `utf16_units`)
3412 * [`str::EncodeUtf16`][] (renamed from `Utf16Units`)
3415 * [`ptr::drop_in_place`]
3417 * [`time::SystemTime`]
3419 * [`Instant::duration_since`][] (renamed from `duration_from_earlier`)
3420 * [`Instant::elapsed`]
3421 * [`SystemTime::now`]
3422 * [`SystemTime::duration_since`][] (renamed from `duration_from_earlier`)
3423 * [`SystemTime::elapsed`]
3424 * Various `Add`/`Sub` impls for `Time` and `SystemTime`
3425 * [`SystemTimeError`]
3426 * [`SystemTimeError::duration`]
3427 * Various impls for `SystemTimeError`
3429 * [`AddAssign`], [`SubAssign`], [`MulAssign`], [`DivAssign`],
3430 [`RemAssign`], [`BitAndAssign`], [`BitOrAssign`],
3431 [`BitXorAssign`], [`ShlAssign`], [`ShrAssign`].
3432 * [The `write!` and `writeln!` macros correctly emit errors if any of
3433 their arguments can't be formatted][1.8w].
3434 * [Various I/O functions support large files on 32-bit Linux][1.8l].
3435 * [The Unix-specific `raw` modules, which contain a number of
3436 redefined C types are deprecated][1.8r], including `os::raw::unix`,
3437 `os::raw::macos`, and `os::raw::linux`. These modules defined types
3438 such as `ino_t` and `dev_t`. The inconsistency of these definitions
3439 across platforms was making it difficult to implement `std`
3440 correctly. Those that need these definitions should use the `libc`
3442 * The Unix-specific `MetadataExt` traits, including
3443 `os::unix::fs::MetadataExt`, which expose values such as inode
3444 numbers [no longer return platform-specific types][1.8r], but
3445 instead return widened integers. [RFC 1415].
3446 * [`btree_set::{IntoIter, Iter, Range}` are covariant][1.8cv].
3447 * [Atomic loads and stores are not volatile][1.8a].
3448 * [All types in `sync::mpsc` implement `fmt::Debug`][1.8mp].
3453 * [Inlining hash functions lead to a 3% compile-time improvement in
3454 some workloads][1.8h].
3455 * When using jemalloc, its symbols are [unprefixed so that it
3456 overrides the libc malloc implementation][1.8h]. This means that for
3457 rustc, LLVM is now using jemalloc, which results in a 6%
3458 compile-time improvement on a specific workload.
3459 * [Avoid quadratic growth in function size due to cleanups][1.8cu].
3464 * [32-bit MSVC builds finally implement unwinding][1.8ms].
3465 i686-pc-windows-msvc is now considered a tier-1 platform.
3466 * [The `--print targets` flag prints a list of supported targets][1.8t].
3467 * [The `--print cfg` flag prints the `cfg`s defined for the current
3469 * [`rustc` can be built with an new Cargo-based build system, written
3470 in Rust][1.8b]. It will eventually replace Rust's Makefile-based
3471 build system. To enable it configure with `configure --rustbuild`.
3472 * [Errors for non-exhaustive `match` patterns now list up to 3 missing
3473 variants while also indicating the total number of missing variants
3474 if more than 3][1.8m].
3475 * [Executable stacks are disabled on Linux and BSD][1.8nx].
3476 * The Rust Project now publishes binary releases of the standard
3477 library for a number of tier-2 targets:
3478 `armv7-unknown-linux-gnueabihf`, `powerpc-unknown-linux-gnu`,
3479 `powerpc64-unknown-linux-gnu`, `powerpc64le-unknown-linux-gnu`
3480 `x86_64-rumprun-netbsd`. These can be installed with
3481 tools such as [multirust][1.8mr].
3486 * [`cargo init` creates a new Cargo project in the current
3487 directory][1.8ci]. It is otherwise like `cargo new`.
3488 * [Cargo has configuration keys for `-v` and
3489 `--color`][1.8cc]. `verbose` and `color`, respectively, go in the
3490 `[term]` section of `.cargo/config`.
3491 * [Configuration keys that evaluate to strings or integers can be set
3492 via environment variables][1.8ce]. For example the `build.jobs` key
3493 can be set via `CARGO_BUILD_JOBS`. Environment variables take
3494 precedence over config files.
3495 * [Target-specific dependencies support Rust `cfg` syntax for
3496 describing targets][1.8cfg] so that dependencies for multiple
3497 targets can be specified together. [RFC 1361].
3498 * [The environment variables `CARGO_TARGET_ROOT`, `RUSTC`, and
3499 `RUSTDOC` take precedence over the `build.target-dir`,
3500 `build.rustc`, and `build.rustdoc` configuration values][1.8cv].
3501 * [The child process tree is killed on Windows when Cargo is
3503 * [The `build.target` configuration value sets the target platform,
3504 like `--target`][1.8ct].
3509 * [Unstable compiler flags have been further restricted][1.8u]. Since
3510 1.0 `-Z` flags have been considered unstable, and other flags that
3511 were considered unstable additionally required passing `-Z
3512 unstable-options` to access. Unlike unstable language and library
3513 features though, these options have been accessible on the stable
3514 release channel. Going forward, *new unstable flags will not be
3515 available on the stable release channel*, and old unstable flags
3516 will warn about their usage. In the future, all unstable flags will
3517 be unavailable on the stable release channel.
3518 * [It is no longer possible to `match` on empty enum variants using
3519 the `Variant(..)` syntax][1.8v]. This has been a warning since 1.6.
3520 * The Unix-specific `MetadataExt` traits, including
3521 `os::unix::fs::MetadataExt`, which expose values such as inode
3522 numbers [no longer return platform-specific types][1.8r], but
3523 instead return widened integers. [RFC 1415].
3524 * [Modules sourced from the filesystem cannot appear within arbitrary
3525 blocks, but only within other modules][1.8mf].
3526 * [`--cfg` compiler flags are parsed strictly as identifiers][1.8c].
3527 * On Unix, [stack overflow triggers a runtime abort instead of a
3529 * [`Command::spawn` and its equivalents return an error if any of
3530 its command-line arguments contain interior `NUL`s][1.8n].
3531 * [Tuple and unit enum variants from other crates are in the type
3533 * [On Windows `rustc` emits `.lib` files for the `staticlib` library
3534 type instead of `.a` files][1.8st]. Additionally, for the MSVC
3535 toolchain, `rustc` emits import libraries named `foo.dll.lib`
3536 instead of `foo.lib`.
3539 [1.8a]: https://github.com/rust-lang/rust/pull/30962
3540 [1.8b]: https://github.com/rust-lang/rust/pull/31123
3541 [1.8c]: https://github.com/rust-lang/rust/pull/31530
3542 [1.8cc]: https://github.com/rust-lang/cargo/pull/2397
3543 [1.8ce]: https://github.com/rust-lang/cargo/pull/2398
3544 [1.8cf]: https://github.com/rust-lang/rust/pull/31278
3545 [1.8cfg]: https://github.com/rust-lang/cargo/pull/2328
3546 [1.8ci]: https://github.com/rust-lang/cargo/pull/2081
3547 [1.8ck]: https://github.com/rust-lang/cargo/pull/2370
3548 [1.8ct]: https://github.com/rust-lang/cargo/pull/2335
3549 [1.8cu]: https://github.com/rust-lang/rust/pull/31390
3550 [1.8cv]: https://github.com/rust-lang/cargo/issues/2365
3551 [1.8cv]: https://github.com/rust-lang/rust/pull/30998
3552 [1.8h]: https://github.com/rust-lang/rust/pull/31460
3553 [1.8l]: https://github.com/rust-lang/rust/pull/31668
3554 [1.8m]: https://github.com/rust-lang/rust/pull/31020
3555 [1.8mf]: https://github.com/rust-lang/rust/pull/31534
3556 [1.8mp]: https://github.com/rust-lang/rust/pull/30894
3557 [1.8mr]: https://users.rust-lang.org/t/multirust-0-8-with-cross-std-installation/4901
3558 [1.8ms]: https://github.com/rust-lang/rust/pull/30448
3559 [1.8n]: https://github.com/rust-lang/rust/pull/31056
3560 [1.8nx]: https://github.com/rust-lang/rust/pull/30859
3561 [1.8r]: https://github.com/rust-lang/rust/pull/31551
3562 [1.8so]: https://github.com/rust-lang/rust/pull/31333
3563 [1.8st]: https://github.com/rust-lang/rust/pull/29520
3564 [1.8t]: https://github.com/rust-lang/rust/pull/31358
3565 [1.8tn]: https://github.com/rust-lang/rust/pull/30882
3566 [1.8u]: https://github.com/rust-lang/rust/pull/31793
3567 [1.8v]: https://github.com/rust-lang/rust/pull/31757
3568 [1.8w]: https://github.com/rust-lang/rust/pull/31904
3569 [RFC 1361]: https://github.com/rust-lang/rfcs/blob/master/text/1361-cargo-cfg-dependencies.md
3570 [RFC 1415]: https://github.com/rust-lang/rfcs/blob/master/text/1415-trim-std-os.md
3571 [RFC 218]: https://github.com/rust-lang/rfcs/blob/master/text/0218-empty-struct-with-braces.md
3572 [RFC 953]: https://github.com/rust-lang/rfcs/blob/master/text/0953-op-assign.md
3573 [`AddAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.AddAssign.html
3574 [`BitAndAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitAndAssign.html
3575 [`BitOrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitOrAssign.html
3576 [`BitXorAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitXorAssign.html
3577 [`DivAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.DivAssign.html
3578 [`Instant::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.duration_since
3579 [`Instant::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.elapsed
3580 [`Instant::now`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.now
3581 [`MulAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.MulAssign.html
3582 [`Ref::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.Ref.html#method.map
3583 [`RefMut::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.RefMut.html#method.map
3584 [`RemAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.RemAssign.html
3585 [`ShlAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShlAssign.html
3586 [`ShrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShrAssign.html
3587 [`SubAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.SubAssign.html
3588 [`SystemTime::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.duration_since
3589 [`SystemTime::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.elapsed
3590 [`SystemTime::now`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.now
3591 [`SystemTimeError::duration`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html#method.duration
3592 [`SystemTimeError`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html
3593 [`UNIX_EPOCH`]: http://doc.rust-lang.org/nightly/std/time/constant.UNIX_EPOCH.html
3594 [`ptr::drop_in_place`]: http://doc.rust-lang.org/nightly/std/ptr/fn.drop_in_place.html
3595 [`str::EncodeUtf16`]: http://doc.rust-lang.org/nightly/std/str/struct.EncodeUtf16.html
3596 [`str::encode_utf16`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.encode_utf16
3597 [`time::Instant`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html
3598 [`time::SystemTime`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html
3601 Version 1.7.0 (2016-03-03)
3602 ==========================
3609 * [`Path::strip_prefix`][] (renamed from relative_from)
3610 * [`path::StripPrefixError`][] (new error type returned from strip_prefix)
3612 * [`Ipv4Addr::is_loopback`]
3613 * [`Ipv4Addr::is_private`]
3614 * [`Ipv4Addr::is_link_local`]
3615 * [`Ipv4Addr::is_multicast`]
3616 * [`Ipv4Addr::is_broadcast`]
3617 * [`Ipv4Addr::is_documentation`]
3619 * [`Ipv6Addr::is_unspecified`]
3620 * [`Ipv6Addr::is_loopback`]
3621 * [`Ipv6Addr::is_multicast`]
3624 * [`Vec::as_mut_slice`]
3626 * [`String::as_str`]
3627 * [`String::as_mut_str`]
3629 * `<[T]>::`[`clone_from_slice`], which now requires the two slices to
3631 * `<[T]>::`[`sort_by_key`]
3632 * checked, saturated, and overflowing operations
3633 * [`i32::checked_rem`], [`i32::checked_neg`], [`i32::checked_shl`], [`i32::checked_shr`]
3634 * [`i32::saturating_mul`]
3635 * [`i32::overflowing_add`], [`i32::overflowing_sub`], [`i32::overflowing_mul`], [`i32::overflowing_div`]
3636 * [`i32::overflowing_rem`], [`i32::overflowing_neg`], [`i32::overflowing_shl`], [`i32::overflowing_shr`]
3637 * [`u32::checked_rem`], [`u32::checked_neg`], [`u32::checked_shl`], [`u32::checked_shl`]
3638 * [`u32::saturating_mul`]
3639 * [`u32::overflowing_add`], [`u32::overflowing_sub`], [`u32::overflowing_mul`], [`u32::overflowing_div`]
3640 * [`u32::overflowing_rem`], [`u32::overflowing_neg`], [`u32::overflowing_shl`], [`u32::overflowing_shr`]
3641 * and checked, saturated, and overflowing operations for other primitive types
3643 * [`ffi::IntoStringError`]
3644 * [`CString::into_string`]
3645 * [`CString::into_bytes`]
3646 * [`CString::into_bytes_with_nul`]
3647 * `From<CString> for Vec<u8>`
3649 * [`IntoStringError::into_cstring`]
3650 * [`IntoStringError::utf8_error`]
3651 * `Error for IntoStringError`
3653 * [`std::hash::BuildHasher`]
3654 * [`BuildHasher::Hasher`]
3655 * [`BuildHasher::build_hasher`]
3656 * [`std::hash::BuildHasherDefault`]
3657 * [`HashMap::with_hasher`]
3658 * [`HashMap::with_capacity_and_hasher`]
3659 * [`HashSet::with_hasher`]
3660 * [`HashSet::with_capacity_and_hasher`]
3661 * [`std::collections::hash_map::RandomState`]
3662 * [`RandomState::new`]
3663 * [Validating UTF-8 is faster by a factor of between 7 and 14x for
3664 ASCII input][1.7utf8]. This means that creating `String`s and `str`s
3665 from bytes is faster.
3666 * [The performance of `LineWriter` (and thus `io::stdout`) was
3667 improved by using `memchr` to search for newlines][1.7m].
3668 * [`f32::to_degrees` and `f32::to_radians` are stable][1.7f]. The
3669 `f64` variants were stabilized previously.
3670 * [`BTreeMap` was rewritten to use less memory and improve the performance
3671 of insertion and iteration, the latter by as much as 5x][1.7bm].
3672 * [`BTreeSet` and its iterators, `Iter`, `IntoIter`, and `Range` are
3673 covariant over their contained type][1.7bt].
3674 * [`LinkedList` and its iterators, `Iter` and `IntoIter` are covariant
3675 over their contained type][1.7ll].
3676 * [`str::replace` now accepts a `Pattern`][1.7rp], like other string
3678 * [`Any` is implemented for unsized types][1.7a].
3679 * [`Hash` is implemented for `Duration`][1.7h].
3684 * [When running tests with `--test`, rustdoc will pass `--cfg`
3685 arguments to the compiler][1.7dt].
3686 * [The compiler is built with RPATH information by default][1.7rpa].
3687 This means that it will be possible to run `rustc` when installed in
3688 unusual configurations without configuring the dynamic linker search
3690 * [`rustc` passes `--enable-new-dtags` to GNU ld][1.7dta]. This makes
3691 any RPATH entries (emitted with `-C rpath`) *not* take precedence
3692 over `LD_LIBRARY_PATH`.
3697 * [`cargo rustc` accepts a `--profile` flag that runs `rustc` under
3698 any of the compilation profiles, 'dev', 'bench', or 'test'][1.7cp].
3699 * [The `rerun-if-changed` build script directive no longer causes the
3700 build script to incorrectly run twice in certain scenarios][1.7rr].
3705 * Soundness fixes to the interactions between associated types and
3706 lifetimes, specified in [RFC 1214], [now generate errors][1.7sf] for
3707 code that violates the new rules. This is a significant change that
3708 is known to break existing code, so it has emitted warnings for the
3709 new error cases since 1.4 to give crate authors time to adapt. The
3710 details of what is changing are subtle; read the RFC for more.
3711 * [Several bugs in the compiler's visibility calculations were
3712 fixed][1.7v]. Since this was found to break significant amounts of
3713 code, the new errors will be emitted as warnings for several release
3714 cycles, under the `private_in_public` lint.
3715 * Defaulted type parameters were accidentally accepted in positions
3716 that were not intended. In this release, [defaulted type parameters
3717 appearing outside of type definitions will generate a
3718 warning][1.7d], which will become an error in future releases.
3719 * [Parsing "." as a float results in an error instead of 0][1.7p].
3720 That is, `".".parse::<f32>()` returns `Err`, not `Ok(0.0)`.
3721 * [Borrows of closure parameters may not outlive the closure][1.7bc].
3723 [1.7a]: https://github.com/rust-lang/rust/pull/30928
3724 [1.7bc]: https://github.com/rust-lang/rust/pull/30341
3725 [1.7bm]: https://github.com/rust-lang/rust/pull/30426
3726 [1.7bt]: https://github.com/rust-lang/rust/pull/30998
3727 [1.7cp]: https://github.com/rust-lang/cargo/pull/2224
3728 [1.7d]: https://github.com/rust-lang/rust/pull/30724
3729 [1.7dt]: https://github.com/rust-lang/rust/pull/30372
3730 [1.7dta]: https://github.com/rust-lang/rust/pull/30394
3731 [1.7f]: https://github.com/rust-lang/rust/pull/30672
3732 [1.7h]: https://github.com/rust-lang/rust/pull/30818
3733 [1.7ll]: https://github.com/rust-lang/rust/pull/30663
3734 [1.7m]: https://github.com/rust-lang/rust/pull/30381
3735 [1.7p]: https://github.com/rust-lang/rust/pull/30681
3736 [1.7rp]: https://github.com/rust-lang/rust/pull/29498
3737 [1.7rpa]: https://github.com/rust-lang/rust/pull/30353
3738 [1.7rr]: https://github.com/rust-lang/cargo/pull/2279
3739 [1.7sf]: https://github.com/rust-lang/rust/pull/30389
3740 [1.7utf8]: https://github.com/rust-lang/rust/pull/30740
3741 [1.7v]: https://github.com/rust-lang/rust/pull/29973
3742 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
3743 [`BuildHasher::Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
3744 [`BuildHasher::build_hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html#tymethod.build_hasher
3745 [`CString::into_bytes_with_nul`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes_with_nul
3746 [`CString::into_bytes`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes
3747 [`CString::into_string`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_string
3748 [`HashMap::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_capacity_and_hasher
3749 [`HashMap::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_hasher
3750 [`HashSet::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_capacity_and_hasher
3751 [`HashSet::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_hasher
3752 [`IntoStringError::into_cstring`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.into_cstring
3753 [`IntoStringError::utf8_error`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.utf8_error
3754 [`Ipv4Addr::is_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_broadcast
3755 [`Ipv4Addr::is_documentation`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_documentation
3756 [`Ipv4Addr::is_link_local`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_link_local
3757 [`Ipv4Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_loopback
3758 [`Ipv4Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_multicast
3759 [`Ipv4Addr::is_private`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_private
3760 [`Ipv6Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_loopback
3761 [`Ipv6Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_multicast
3762 [`Ipv6Addr::is_unspecified`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_unspecified
3763 [`Path::strip_prefix`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.strip_prefix
3764 [`RandomState::new`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html#method.new
3765 [`String::as_mut_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_mut_str
3766 [`String::as_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_str
3767 [`Vec::as_mut_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_mut_slice
3768 [`Vec::as_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_slice
3769 [`clone_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.clone_from_slice
3770 [`ffi::IntoStringError`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html
3771 [`i32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_neg
3772 [`i32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_rem
3773 [`i32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shl
3774 [`i32::checked_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shr
3775 [`i32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_add
3776 [`i32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_div
3777 [`i32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_mul
3778 [`i32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_neg
3779 [`i32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_rem
3780 [`i32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shl
3781 [`i32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shr
3782 [`i32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_sub
3783 [`i32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.saturating_mul
3784 [`path::StripPrefixError`]: http://doc.rust-lang.org/nightly/std/path/struct.StripPrefixError.html
3785 [`sort_by_key`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.sort_by_key
3786 [`std::collections::hash_map::RandomState`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html
3787 [`std::hash::BuildHasherDefault`]: http://doc.rust-lang.org/nightly/std/hash/struct.BuildHasherDefault.html
3788 [`std::hash::BuildHasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html
3789 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
3790 [`u32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_rem
3791 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
3792 [`u32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_shl
3793 [`u32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_add
3794 [`u32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_div
3795 [`u32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_mul
3796 [`u32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_neg
3797 [`u32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_rem
3798 [`u32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shl
3799 [`u32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shr
3800 [`u32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_sub
3801 [`u32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.saturating_mul
3804 Version 1.6.0 (2016-01-21)
3805 ==========================
3810 * The `#![no_std]` attribute causes a crate to not be linked to the
3811 standard library, but only the [core library][1.6co], as described
3812 in [RFC 1184]. The core library defines common types and traits but
3813 has no platform dependencies whatsoever, and is the basis for Rust
3814 software in environments that cannot support a full port of the
3815 standard library, such as operating systems. Most of the core
3816 library is now stable.
3822 [`Read::read_exact`],
3823 [`ErrorKind::UnexpectedEof`][] (renamed from `UnexpectedEOF`),
3824 [`fs::DirBuilder`], [`fs::DirBuilder::new`],
3825 [`fs::DirBuilder::recursive`], [`fs::DirBuilder::create`],
3826 [`os::unix::fs::DirBuilderExt`],
3827 [`os::unix::fs::DirBuilderExt::mode`], [`vec::Drain`],
3828 [`vec::Vec::drain`], [`string::Drain`], [`string::String::drain`],
3829 [`vec_deque::Drain`], [`vec_deque::VecDeque::drain`],
3830 [`collections::hash_map::Drain`],
3831 [`collections::hash_map::HashMap::drain`],
3832 [`collections::hash_set::Drain`],
3833 [`collections::hash_set::HashSet::drain`],
3834 [`collections::binary_heap::Drain`],
3835 [`collections::binary_heap::BinaryHeap::drain`],
3836 [`Vec::extend_from_slice`][] (renamed from `push_all`),
3837 [`Mutex::get_mut`], [`Mutex::into_inner`], [`RwLock::get_mut`],
3838 [`RwLock::into_inner`],
3839 [`Iterator::min_by_key`][] (renamed from `min_by`),
3840 [`Iterator::max_by_key`][] (renamed from `max_by`).
3841 * The [core library][1.6co] is stable, as are most of its APIs.
3842 * [The `assert_eq!` macro supports arguments that don't implement
3843 `Sized`][1.6ae], such as arrays. In this way it behaves more like
3845 * Several timer functions that take duration in milliseconds [are
3846 deprecated in favor of those that take `Duration`][1.6ms]. These
3847 include `Condvar::wait_timeout_ms`, `thread::sleep_ms`, and
3848 `thread::park_timeout_ms`.
3849 * The algorithm by which `Vec` reserves additional elements was
3850 [tweaked to not allocate excessive space][1.6a] while still growing
3852 * `From` conversions are [implemented from integers to floats][1.6f]
3853 in cases where the conversion is lossless. Thus they are not
3854 implemented for 32-bit ints to `f32`, nor for 64-bit ints to `f32`
3855 or `f64`. They are also not implemented for `isize` and `usize`
3856 because the implementations would be platform-specific. `From` is
3857 also implemented from `f32` to `f64`.
3858 * `From<&Path>` and `From<PathBuf>` are implemented for `Cow<Path>`.
3859 * `From<T>` is implemented for `Box<T>`, `Rc<T>` and `Arc<T>`.
3860 * `IntoIterator` is implemented for `&PathBuf` and `&Path`.
3861 * [`BinaryHeap` was refactored][1.6bh] for modest performance
3863 * Sorting slices that are already sorted [is 50% faster in some
3869 * Cargo will look in `$CARGO_HOME/bin` for subcommands [by default][1.6c].
3870 * Cargo build scripts can specify their dependencies by emitting the
3871 [`rerun-if-changed`][1.6rr] key.
3872 * crates.io will reject publication of crates with dependencies that
3873 have a wildcard version constraint. Crates with wildcard
3874 dependencies were seen to cause a variety of problems, as described
3875 in [RFC 1241]. Since 1.5 publication of such crates has emitted a
3877 * `cargo clean` [accepts a `--release` flag][1.6cc] to clean the
3878 release folder. A variety of artifacts that Cargo failed to clean
3879 are now correctly deleted.
3884 * The `unreachable_code` lint [warns when a function call's argument
3886 * The parser indicates [failures that may be caused by
3887 confusingly-similar Unicode characters][1.6uc]
3888 * Certain macro errors [are reported at definition time][1.6m], not
3894 * The compiler no longer makes use of the [`RUST_PATH`][1.6rp]
3895 environment variable when locating crates. This was a pre-cargo
3896 feature for integrating with the package manager that was
3897 accidentally never removed.
3898 * [A number of bugs were fixed in the privacy checker][1.6p] that
3899 could cause previously-accepted code to break.
3900 * [Modules and unit/tuple structs may not share the same name][1.6ts].
3901 * [Bugs in pattern matching unit structs were fixed][1.6us]. The tuple
3902 struct pattern syntax (`Foo(..)`) can no longer be used to match
3903 unit structs. This is a warning now, but will become an error in
3904 future releases. Patterns that share the same name as a const are
3906 * A bug was fixed that causes [rustc not to apply default type
3907 parameters][1.6xc] when resolving certain method implementations of
3908 traits defined in other crates.
3910 [1.6a]: https://github.com/rust-lang/rust/pull/29454
3911 [1.6ae]: https://github.com/rust-lang/rust/pull/29770
3912 [1.6bh]: https://github.com/rust-lang/rust/pull/29811
3913 [1.6c]: https://github.com/rust-lang/cargo/pull/2192
3914 [1.6cc]: https://github.com/rust-lang/cargo/pull/2131
3915 [1.6co]: http://doc.rust-lang.org/beta/core/index.html
3916 [1.6dv]: https://github.com/rust-lang/rust/pull/30000
3917 [1.6f]: https://github.com/rust-lang/rust/pull/29129
3918 [1.6m]: https://github.com/rust-lang/rust/pull/29828
3919 [1.6ms]: https://github.com/rust-lang/rust/pull/29604
3920 [1.6p]: https://github.com/rust-lang/rust/pull/29726
3921 [1.6rp]: https://github.com/rust-lang/rust/pull/30034
3922 [1.6rr]: https://github.com/rust-lang/cargo/pull/2134
3923 [1.6s]: https://github.com/rust-lang/rust/pull/29675
3924 [1.6ts]: https://github.com/rust-lang/rust/issues/21546
3925 [1.6uc]: https://github.com/rust-lang/rust/pull/29837
3926 [1.6us]: https://github.com/rust-lang/rust/pull/29383
3927 [1.6xc]: https://github.com/rust-lang/rust/issues/30123
3928 [RFC 1184]: https://github.com/rust-lang/rfcs/blob/master/text/1184-stabilize-no_std.md
3929 [RFC 1241]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
3930 [`ErrorKind::UnexpectedEof`]: http://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html#variant.UnexpectedEof
3931 [`Iterator::max_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.max_by_key
3932 [`Iterator::min_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.min_by_key
3933 [`Mutex::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.get_mut
3934 [`Mutex::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.into_inner
3935 [`Read::read_exact`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_exact
3936 [`RwLock::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.get_mut
3937 [`RwLock::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.into_inner
3938 [`Vec::extend_from_slice`]: http://doc.rust-lang.org/nightly/collections/vec/struct.Vec.html#method.extend_from_slice
3939 [`collections::binary_heap::BinaryHeap::drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.BinaryHeap.html#method.drain
3940 [`collections::binary_heap::Drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.Drain.html
3941 [`collections::hash_map::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.Drain.html
3942 [`collections::hash_map::HashMap::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.HashMap.html#method.drain
3943 [`collections::hash_set::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.Drain.html
3944 [`collections::hash_set::HashSet::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.HashSet.html#method.drain
3945 [`fs::DirBuilder::create`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.create
3946 [`fs::DirBuilder::new`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.new
3947 [`fs::DirBuilder::recursive`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.recursive
3948 [`fs::DirBuilder`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html
3949 [`os::unix::fs::DirBuilderExt::mode`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html#tymethod.mode
3950 [`os::unix::fs::DirBuilderExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html
3951 [`string::Drain`]: http://doc.rust-lang.org/nightly/std/string/struct.Drain.html
3952 [`string::String::drain`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.drain
3953 [`vec::Drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Drain.html
3954 [`vec::Vec::drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.drain
3955 [`vec_deque::Drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.Drain.html
3956 [`vec_deque::VecDeque::drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.VecDeque.html#method.drain
3959 Version 1.5.0 (2015-12-10)
3960 ==========================
3962 * ~700 changes, numerous bugfixes
3968 [`BinaryHeap::from`], [`BinaryHeap::into_sorted_vec`],
3969 [`BinaryHeap::into_vec`], [`Condvar::wait_timeout`],
3970 [`FileTypeExt::is_block_device`], [`FileTypeExt::is_char_device`],
3971 [`FileTypeExt::is_fifo`], [`FileTypeExt::is_socket`],
3972 [`FileTypeExt`], [`Formatter::alternate`], [`Formatter::fill`],
3973 [`Formatter::precision`], [`Formatter::sign_aware_zero_pad`],
3974 [`Formatter::sign_minus`], [`Formatter::sign_plus`],
3975 [`Formatter::width`], [`Iterator::cmp`], [`Iterator::eq`],
3976 [`Iterator::ge`], [`Iterator::gt`], [`Iterator::le`],
3977 [`Iterator::lt`], [`Iterator::ne`], [`Iterator::partial_cmp`],
3978 [`Path::canonicalize`], [`Path::exists`], [`Path::is_dir`],
3979 [`Path::is_file`], [`Path::metadata`], [`Path::read_dir`],
3980 [`Path::read_link`], [`Path::symlink_metadata`],
3981 [`Utf8Error::valid_up_to`], [`Vec::resize`],
3982 [`VecDeque::as_mut_slices`], [`VecDeque::as_slices`],
3983 [`VecDeque::insert`], [`VecDeque::shrink_to_fit`],
3984 [`VecDeque::swap_remove_back`], [`VecDeque::swap_remove_front`],
3985 [`slice::split_first_mut`], [`slice::split_first`],
3986 [`slice::split_last_mut`], [`slice::split_last`],
3987 [`char::from_u32_unchecked`], [`fs::canonicalize`],
3988 [`str::MatchIndices`], [`str::RMatchIndices`],
3989 [`str::match_indices`], [`str::rmatch_indices`],
3990 [`str::slice_mut_unchecked`], [`string::ParseError`].
3991 * Rust applications hosted on crates.io can be installed locally to
3992 `~/.cargo/bin` with the [`cargo install`] command. Among other
3993 things this makes it easier to augment Cargo with new subcommands:
3994 when a binary named e.g. `cargo-foo` is found in `$PATH` it can be
3995 invoked as `cargo foo`.
3996 * Crates with wildcard (`*`) dependencies will [emit warnings when
3997 published][1.5w]. In 1.6 it will no longer be possible to publish
3998 crates with wildcard dependencies.
4003 * The rules determining when a particular lifetime must outlive
4004 a particular value (known as '[dropck]') have been [modified
4005 to not rely on parametricity][1.5p].
4006 * [Implementations of `AsRef` and `AsMut` were added to `Box`, `Rc`,
4007 and `Arc`][1.5a]. Because these smart pointer types implement
4008 `Deref`, this causes breakage in cases where the interior type
4009 contains methods of the same name.
4010 * [Correct a bug in Rc/Arc][1.5c] that caused [dropck] to be unaware
4011 that they could drop their content. Soundness fix.
4012 * All method invocations are [properly checked][1.5wf1] for
4013 [well-formedness][1.5wf2]. Soundness fix.
4014 * Traits whose supertraits contain `Self` are [not object
4015 safe][1.5o]. Soundness fix.
4016 * Target specifications support a [`no_default_libraries`][1.5nd]
4017 setting that controls whether `-nodefaultlibs` is passed to the
4018 linker, and in turn the `is_like_windows` setting no longer affects
4019 the `-nodefaultlibs` flag.
4020 * `#[derive(Show)]`, long-deprecated, [has been removed][1.5ds].
4021 * The `#[inline]` and `#[repr]` attributes [can only appear
4022 in valid locations][1.5at].
4023 * Native libraries linked from the local crate are [passed to
4024 the linker before native libraries from upstream crates][1.5nl].
4025 * Two rarely-used attributes, `#[no_debug]` and
4026 `#[omit_gdb_pretty_printer_section]` [are feature gated][1.5fg].
4027 * Negation of unsigned integers, which has been a warning for
4028 several releases, [is now behind a feature gate and will
4029 generate errors][1.5nu].
4030 * The parser accidentally accepted visibility modifiers on
4031 enum variants, a bug [which has been fixed][1.5ev].
4032 * [A bug was fixed that allowed `use` statements to import unstable
4038 * When evaluating expressions at compile-time that are not
4039 compile-time constants (const-evaluating expressions in non-const
4040 contexts), incorrect code such as overlong bitshifts and arithmetic
4041 overflow will [generate a warning instead of an error][1.5ce],
4042 delaying the error until runtime. This will allow the
4043 const-evaluator to be expanded in the future backwards-compatibly.
4044 * The `improper_ctypes` lint [no longer warns about using `isize` and
4045 `usize` in FFI][1.5ict].
4050 * `Arc<T>` and `Rc<T>` are [covariant with respect to `T` instead of
4052 * `Default` is [implemented for mutable slices][1.5d].
4053 * `FromStr` is [implemented for `SockAddrV4` and `SockAddrV6`][1.5s].
4054 * There are now `From` conversions [between floating point
4055 types][1.5f] where the conversions are lossless.
4056 * There are now `From` conversions [between integer types][1.5i] where
4057 the conversions are lossless.
4058 * [`fs::Metadata` implements `Clone`][1.5fs].
4059 * The `parse` method [accepts a leading "+" when parsing
4061 * [`AsMut` is implemented for `Vec`][1.5am].
4062 * The `clone_from` implementations for `String` and `BinaryHeap` [have
4063 been optimized][1.5cf] and no longer rely on the default impl.
4064 * The `extern "Rust"`, `extern "C"`, `unsafe extern "Rust"` and
4065 `unsafe extern "C"` function types now [implement `Clone`,
4066 `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and
4067 `fmt::Debug` for up to 12 arguments][1.5fp].
4068 * [Dropping `Vec`s is much faster in unoptimized builds when the
4069 element types don't implement `Drop`][1.5dv].
4070 * A bug that caused in incorrect behavior when [combining `VecDeque`
4071 with zero-sized types][1.5vdz] was resolved.
4072 * [`PartialOrd` for slices is faster][1.5po].
4077 * [Crate metadata size was reduced by 20%][1.5md].
4078 * [Improvements to code generation reduced the size of libcore by 3.3
4079 MB and rustc's memory usage by 18MB][1.5m].
4080 * [Improvements to deref translation increased performance in
4081 unoptimized builds][1.5dr].
4082 * Various errors in trait resolution [are deduplicated to only be
4083 reported once][1.5te].
4084 * Rust has preliminary [support for rumprun kernels][1.5rr].
4085 * Rust has preliminary [support for NetBSD on amd64][1.5na].
4087 [1.5use]: https://github.com/rust-lang/rust/pull/28364
4088 [1.5po]: https://github.com/rust-lang/rust/pull/28436
4089 [1.5ev]: https://github.com/rust-lang/rust/pull/28442
4090 [1.5nu]: https://github.com/rust-lang/rust/pull/28468
4091 [1.5dr]: https://github.com/rust-lang/rust/pull/28491
4092 [1.5vdz]: https://github.com/rust-lang/rust/pull/28494
4093 [1.5md]: https://github.com/rust-lang/rust/pull/28521
4094 [1.5fg]: https://github.com/rust-lang/rust/pull/28522
4095 [1.5dv]: https://github.com/rust-lang/rust/pull/28531
4096 [1.5na]: https://github.com/rust-lang/rust/pull/28543
4097 [1.5fp]: https://github.com/rust-lang/rust/pull/28560
4098 [1.5rr]: https://github.com/rust-lang/rust/pull/28593
4099 [1.5cf]: https://github.com/rust-lang/rust/pull/28602
4100 [1.5nl]: https://github.com/rust-lang/rust/pull/28605
4101 [1.5te]: https://github.com/rust-lang/rust/pull/28645
4102 [1.5at]: https://github.com/rust-lang/rust/pull/28650
4103 [1.5am]: https://github.com/rust-lang/rust/pull/28663
4104 [1.5m]: https://github.com/rust-lang/rust/pull/28778
4105 [1.5ict]: https://github.com/rust-lang/rust/pull/28779
4106 [1.5a]: https://github.com/rust-lang/rust/pull/28811
4107 [1.5pi]: https://github.com/rust-lang/rust/pull/28826
4108 [1.5ce]: https://github.com/rust-lang/rfcs/blob/master/text/1229-compile-time-asserts.md
4109 [1.5p]: https://github.com/rust-lang/rfcs/blob/master/text/1238-nonparametric-dropck.md
4110 [1.5i]: https://github.com/rust-lang/rust/pull/28921
4111 [1.5fs]: https://github.com/rust-lang/rust/pull/29021
4112 [1.5f]: https://github.com/rust-lang/rust/pull/29129
4113 [1.5ds]: https://github.com/rust-lang/rust/pull/29148
4114 [1.5s]: https://github.com/rust-lang/rust/pull/29190
4115 [1.5d]: https://github.com/rust-lang/rust/pull/29245
4116 [1.5o]: https://github.com/rust-lang/rust/pull/29259
4117 [1.5nd]: https://github.com/rust-lang/rust/pull/28578
4118 [1.5wf2]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
4119 [1.5wf1]: https://github.com/rust-lang/rust/pull/28669
4120 [dropck]: https://doc.rust-lang.org/nightly/nomicon/dropck.html
4121 [1.5c]: https://github.com/rust-lang/rust/pull/29110
4122 [1.5w]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
4123 [`cargo install`]: https://github.com/rust-lang/rfcs/blob/master/text/1200-cargo-install.md
4124 [`BinaryHeap::from`]: http://doc.rust-lang.org/nightly/std/convert/trait.From.html#method.from
4125 [`BinaryHeap::into_sorted_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_sorted_vec
4126 [`BinaryHeap::into_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_vec
4127 [`Condvar::wait_timeout`]: http://doc.rust-lang.org/nightly/std/sync/struct.Condvar.html#method.wait_timeout
4128 [`FileTypeExt::is_block_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_block_device
4129 [`FileTypeExt::is_char_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_char_device
4130 [`FileTypeExt::is_fifo`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_fifo
4131 [`FileTypeExt::is_socket`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_socket
4132 [`FileTypeExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html
4133 [`Formatter::alternate`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.alternate
4134 [`Formatter::fill`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.fill
4135 [`Formatter::precision`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.precision
4136 [`Formatter::sign_aware_zero_pad`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_aware_zero_pad
4137 [`Formatter::sign_minus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_minus
4138 [`Formatter::sign_plus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_plus
4139 [`Formatter::width`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.width
4140 [`Iterator::cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.cmp
4141 [`Iterator::eq`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.eq
4142 [`Iterator::ge`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ge
4143 [`Iterator::gt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.gt
4144 [`Iterator::le`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.le
4145 [`Iterator::lt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.lt
4146 [`Iterator::ne`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ne
4147 [`Iterator::partial_cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.partial_cmp
4148 [`Path::canonicalize`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.canonicalize
4149 [`Path::exists`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.exists
4150 [`Path::is_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_dir
4151 [`Path::is_file`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_file
4152 [`Path::metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.metadata
4153 [`Path::read_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_dir
4154 [`Path::read_link`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_link
4155 [`Path::symlink_metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.symlink_metadata
4156 [`Utf8Error::valid_up_to`]: http://doc.rust-lang.org/nightly/core/str/struct.Utf8Error.html#method.valid_up_to
4157 [`Vec::resize`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.resize
4158 [`VecDeque::as_mut_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_mut_slices
4159 [`VecDeque::as_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_slices
4160 [`VecDeque::insert`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.insert
4161 [`VecDeque::shrink_to_fit`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.shrink_to_fit
4162 [`VecDeque::swap_remove_back`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_back
4163 [`VecDeque::swap_remove_front`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_front
4164 [`slice::split_first_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first_mut
4165 [`slice::split_first`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first
4166 [`slice::split_last_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last_mut
4167 [`slice::split_last`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last
4168 [`char::from_u32_unchecked`]: http://doc.rust-lang.org/nightly/std/char/fn.from_u32_unchecked.html
4169 [`fs::canonicalize`]: http://doc.rust-lang.org/nightly/std/fs/fn.canonicalize.html
4170 [`str::MatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.MatchIndices.html
4171 [`str::RMatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.RMatchIndices.html
4172 [`str::match_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.match_indices
4173 [`str::rmatch_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatch_indices
4174 [`str::slice_mut_unchecked`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.slice_mut_unchecked
4175 [`string::ParseError`]: http://doc.rust-lang.org/nightly/std/string/enum.ParseError.html
4177 Version 1.4.0 (2015-10-29)
4178 ==========================
4180 * ~1200 changes, numerous bugfixes
4185 * Windows builds targeting the 64-bit MSVC ABI and linker (instead of
4186 GNU) are now supported and recommended for use.
4191 * [Several changes have been made to fix type soundness and improve
4192 the behavior of associated types][sound]. See [RFC 1214]. Although
4193 we have mostly introduced these changes as warnings this release, to
4194 become errors next release, there are still some scenarios that will
4195 see immediate breakage.
4196 * [The `str::lines` and `BufRead::lines` iterators treat `\r\n` as
4197 line breaks in addition to `\n`][crlf].
4198 * [Loans of `'static` lifetime extend to the end of a function][stat].
4199 * [`str::parse` no longer introduces avoidable rounding error when
4200 parsing floating point numbers. Together with earlier changes to
4201 float formatting/output, "round trips" like f.to_string().parse()
4202 now preserve the value of f exactly. Additionally, leading plus
4203 signs are now accepted][fp3].
4209 * `use` statements that import multiple items [can now rename
4210 them][i], as in `use foo::{bar as kitten, baz as puppy}`.
4211 * [Binops work correctly on fat pointers][binfat].
4212 * `pub extern crate`, which does not behave as expected, [issues a
4213 warning][pec] until a better solution is found.
4218 * [Many APIs were stabilized][stab]: `<Box<str>>::into_string`,
4219 [`Arc::downgrade`], [`Arc::get_mut`], [`Arc::make_mut`],
4220 [`Arc::try_unwrap`], [`Box::from_raw`], [`Box::into_raw`], [`CStr::to_str`],
4221 [`CStr::to_string_lossy`], [`CString::from_raw`], [`CString::into_raw`],
4222 [`IntoRawFd::into_raw_fd`], [`IntoRawFd`],
4223 `IntoRawHandle::into_raw_handle`, `IntoRawHandle`,
4224 `IntoRawSocket::into_raw_socket`, `IntoRawSocket`, [`Rc::downgrade`],
4225 [`Rc::get_mut`], [`Rc::make_mut`], [`Rc::try_unwrap`], [`Result::expect`],
4226 [`String::into_boxed_str`], [`TcpStream::read_timeout`],
4227 [`TcpStream::set_read_timeout`], [`TcpStream::set_write_timeout`],
4228 [`TcpStream::write_timeout`], [`UdpSocket::read_timeout`],
4229 [`UdpSocket::set_read_timeout`], [`UdpSocket::set_write_timeout`],
4230 [`UdpSocket::write_timeout`], `Vec::append`, `Vec::split_off`,
4231 [`VecDeque::append`], [`VecDeque::retain`], [`VecDeque::split_off`],
4232 [`rc::Weak::upgrade`], [`rc::Weak`], [`slice::Iter::as_slice`],
4233 [`slice::IterMut::into_slice`], [`str::CharIndices::as_str`],
4234 [`str::Chars::as_str`], [`str::split_at_mut`], [`str::split_at`],
4235 [`sync::Weak::upgrade`], [`sync::Weak`], [`thread::park_timeout`],
4237 * [Some APIs were deprecated][dep]: `BTreeMap::with_b`,
4238 `BTreeSet::with_b`, `Option::as_mut_slice`, `Option::as_slice`,
4239 `Result::as_mut_slice`, `Result::as_slice`, `f32::from_str_radix`,
4240 `f64::from_str_radix`.
4241 * [Reverse-searching strings is faster with the 'two-way'
4243 * [`std::io::copy` allows `?Sized` arguments][cc].
4244 * The `Windows`, `Chunks`, and `ChunksMut` iterators over slices all
4245 [override `count`, `nth` and `last` with an O(1)
4246 implementation][it].
4247 * [`Default` is implemented for arrays up to `[T; 32]`][d].
4248 * [`IntoRawFd` has been added to the Unix-specific prelude,
4249 `IntoRawSocket` and `IntoRawHandle` to the Windows-specific
4251 * [`Extend<String>` and `FromIterator<String` are both implemented for
4253 * [`IntoIterator` is implemented for references to `Option` and
4255 * [`HashMap` and `HashSet` implement `Extend<&T>` where `T:
4256 Copy`][ext] as part of [RFC 839]. This will cause type inference
4257 breakage in rare situations.
4258 * [`BinaryHeap` implements `Debug`][bh2].
4259 * [`Borrow` and `BorrowMut` are implemented for fixed-size
4261 * [`extern fn`s with the "Rust" and "C" ABIs implement common
4262 traits including `Eq`, `Ord`, `Debug`, `Hash`][fp].
4263 * [String comparison is faster][faststr].
4264 * `&mut T` where `T: std::fmt::Write` [also implements
4265 `std::fmt::Write`][mutw].
4266 * [A stable regression in `VecDeque::push_back` and other
4267 capacity-altering methods that caused panics for zero-sized types
4269 * [Function pointers implement traits for up to 12 parameters][fp2].
4274 * The compiler [no longer uses the 'morestack' feature to prevent
4275 stack overflow][mm]. Instead it uses guard pages and stack
4276 probes (though stack probes are not yet implemented on any platform
4278 * [The compiler matches traits faster when projections are involved][p].
4279 * The 'improper_ctypes' lint [no longer warns about use of `isize` and
4281 * [Cargo now displays useful information about what its doing during
4282 `cargo update`][cu].
4284 [`Arc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.downgrade
4285 [`Arc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.make_mut
4286 [`Arc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.get_mut
4287 [`Arc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.try_unwrap
4288 [`Box::from_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.from_raw
4289 [`Box::into_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.into_raw
4290 [`CStr::to_str`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_str
4291 [`CStr::to_string_lossy`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_string_lossy
4292 [`CString::from_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.from_raw
4293 [`CString::into_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_raw
4294 [`IntoRawFd::into_raw_fd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html#tymethod.into_raw_fd
4295 [`IntoRawFd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html
4296 [`Rc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.downgrade
4297 [`Rc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.get_mut
4298 [`Rc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.make_mut
4299 [`Rc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.try_unwrap
4300 [`Result::expect`]: http://doc.rust-lang.org/nightly/core/result/enum.Result.html#method.expect
4301 [`String::into_boxed_str`]: http://doc.rust-lang.org/nightly/collections/string/struct.String.html#method.into_boxed_str
4302 [`TcpStream::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
4303 [`TcpStream::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
4304 [`TcpStream::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
4305 [`TcpStream::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
4306 [`UdpSocket::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
4307 [`UdpSocket::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
4308 [`UdpSocket::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
4309 [`UdpSocket::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
4310 [`VecDeque::append`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.append
4311 [`VecDeque::retain`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.retain
4312 [`VecDeque::split_off`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.split_off
4313 [`rc::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html#method.upgrade
4314 [`rc::Weak`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html
4315 [`slice::Iter::as_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.Iter.html#method.as_slice
4316 [`slice::IterMut::into_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.IterMut.html#method.into_slice
4317 [`str::CharIndices::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.CharIndices.html#method.as_str
4318 [`str::Chars::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.Chars.html#method.as_str
4319 [`str::split_at_mut`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at_mut
4320 [`str::split_at`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at
4321 [`sync::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html#method.upgrade
4322 [`sync::Weak`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html
4323 [`thread::park_timeout`]: http://doc.rust-lang.org/nightly/std/thread/fn.park_timeout.html
4324 [`thread::sleep`]: http://doc.rust-lang.org/nightly/std/thread/fn.sleep.html
4325 [bh2]: https://github.com/rust-lang/rust/pull/28156
4326 [binfat]: https://github.com/rust-lang/rust/pull/28270
4327 [bm]: https://github.com/rust-lang/rust/pull/28197
4328 [cc]: https://github.com/rust-lang/rust/pull/27531
4329 [crlf]: https://github.com/rust-lang/rust/pull/28034
4330 [cu]: https://github.com/rust-lang/cargo/pull/1931
4331 [d]: https://github.com/rust-lang/rust/pull/27825
4332 [dep]: https://github.com/rust-lang/rust/pull/28339
4333 [es]: https://github.com/rust-lang/rust/pull/27956
4334 [ext]: https://github.com/rust-lang/rust/pull/28094
4335 [faststr]: https://github.com/rust-lang/rust/pull/28338
4336 [ffi]: https://github.com/rust-lang/rust/pull/28779
4337 [fp]: https://github.com/rust-lang/rust/pull/28268
4338 [fp2]: https://github.com/rust-lang/rust/pull/28560
4339 [fp3]: https://github.com/rust-lang/rust/pull/27307
4340 [i]: https://github.com/rust-lang/rust/pull/27451
4341 [into2]: https://github.com/rust-lang/rust/pull/28039
4342 [it]: https://github.com/rust-lang/rust/pull/27652
4343 [mm]: https://github.com/rust-lang/rust/pull/27338
4344 [mutw]: https://github.com/rust-lang/rust/pull/28368
4345 [sound]: https://github.com/rust-lang/rust/pull/27641
4346 [p]: https://github.com/rust-lang/rust/pull/27866
4347 [pec]: https://github.com/rust-lang/rust/pull/28486
4348 [pr]: https://github.com/rust-lang/rust/pull/27896
4349 [RFC 839]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
4350 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
4351 [s]: https://github.com/rust-lang/rust/pull/27474
4352 [stab]: https://github.com/rust-lang/rust/pull/28339
4353 [stat]: https://github.com/rust-lang/rust/pull/28321
4354 [vd]: https://github.com/rust-lang/rust/pull/28494
4356 Version 1.3.0 (2015-09-17)
4357 ==============================
4359 * ~900 changes, numerous bugfixes
4364 * The [new object lifetime defaults][nold] have been [turned
4365 on][nold2] after a cycle of warnings about the change. Now types
4366 like `&'a Box<Trait>` (or `&'a Rc<Trait>`, etc) will change from
4367 being interpreted as `&'a Box<Trait+'a>` to `&'a
4368 Box<Trait+'static>`.
4369 * [The Rustonomicon][nom] is a new book in the official documentation
4370 that dives into writing unsafe Rust.
4371 * The [`Duration`] API, [has been stabilized][ds]. This basic unit of
4372 timekeeping is employed by other std APIs, as well as out-of-tree
4378 * The [new object lifetime defaults][nold] have been [turned
4379 on][nold2] after a cycle of warnings about the change.
4380 * There is a known [regression][lr] in how object lifetime elision is
4381 interpreted, the proper solution for which is undetermined.
4382 * The `#[prelude_import]` attribute, an internal implementation
4383 detail, was accidentally stabilized previously. [It has been put
4384 behind the `prelude_import` feature gate][pi]. This change is
4385 believed to break no existing code.
4386 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
4387 [more sane for dynamically sized types][dst3]. Code that relied on
4388 the previous behavior is thought to be broken.
4389 * The `dropck` rules, which checks that destructors can't access
4390 destroyed values, [have been updated][dropck] to match the
4391 [RFC][dropckrfc]. This fixes some soundness holes, and as such will
4392 cause some previously-compiling code to no longer build.
4397 * The [new object lifetime defaults][nold] have been [turned
4398 on][nold2] after a cycle of warnings about the change.
4399 * Semicolons may [now follow types and paths in
4400 macros](https://github.com/rust-lang/rust/pull/27000).
4401 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
4402 [more sane for dynamically sized types][dst3]. Code that relied on
4403 the previous behavior is not known to exist, and suspected to be
4405 * `'static` variables [may now be recursive][st].
4406 * `ref` bindings choose between [`Deref`] and [`DerefMut`]
4407 implementations correctly.
4408 * The `dropck` rules, which checks that destructors can't access
4409 destroyed values, [have been updated][dropck] to match the
4415 * The [`Duration`] API, [has been stabilized][ds], as well as the
4416 `std::time` module, which presently contains only `Duration`.
4417 * `Box<str>` and `Box<[T]>` both implement `Clone`.
4418 * The owned C string, [`CString`], implements [`Borrow`] and the
4419 borrowed C string, [`CStr`], implements [`ToOwned`]. The two of
4420 these allow C strings to be borrowed and cloned in generic code.
4421 * [`CStr`] implements [`Debug`].
4422 * [`AtomicPtr`] implements [`Debug`].
4423 * [`Error`] trait objects [can be downcast to their concrete types][e]
4424 in many common configurations, using the [`is`], [`downcast`],
4425 [`downcast_ref`] and [`downcast_mut`] methods, similarly to the
4427 * Searching for substrings now [employs the two-way algorithm][search]
4428 instead of doing a naive search. This gives major speedups to a
4429 number of methods, including [`contains`][sc], [`find`][sf],
4430 [`rfind`][srf], [`split`][ss]. [`starts_with`][ssw] and
4431 [`ends_with`][sew] are also faster.
4432 * The performance of `PartialEq` for slices is [much faster][ps].
4433 * The [`Hash`] trait offers the default method, [`hash_slice`], which
4434 is overridden and optimized by the implementations for scalars.
4435 * The [`Hasher`] trait now has a number of specialized `write_*`
4436 methods for primitive types, for efficiency.
4437 * The I/O-specific error type, [`std::io::Error`][ie], gained a set of
4438 methods for accessing the 'inner error', if any: [`get_ref`][iegr],
4439 [`get_mut`][iegm], [`into_inner`][ieii]. As well, the implementation
4440 of [`std::error::Error::cause`][iec] also delegates to the inner
4442 * [`process::Child`][pc] gained the [`id`] method, which returns a
4443 `u32` representing the platform-specific process identifier.
4444 * The [`connect`] method on slices is deprecated, replaced by the new
4445 [`join`] method (note that both of these are on the *unstable*
4446 [`SliceConcatExt`] trait, but through the magic of the prelude are
4447 available to stable code anyway).
4448 * The [`Div`] operator is implemented for [`Wrapping`] types.
4449 * [`DerefMut` is implemented for `String`][dms].
4450 * Performance of SipHash (the default hasher for `HashMap`) is
4451 [better for long data][sh].
4452 * [`AtomicPtr`] implements [`Send`].
4453 * The [`read_to_end`] implementations for [`Stdin`] and [`File`]
4454 are now [specialized to use uninitialized buffers for increased
4456 * Lifetime parameters of foreign functions [are now resolved
4462 * Rust can now, with some coercion, [produce programs that run on
4463 Windows XP][xp], though XP is not considered a supported platform.
4464 * Porting Rust on Windows from the GNU toolchain to MSVC continues
4465 ([1][win1], [2][win2], [3][win3], [4][win4]). It is still not
4466 recommended for use in 1.3, though should be fully-functional
4467 in the [64-bit 1.4 beta][b14].
4468 * On Fedora-based systems installation will [properly configure the
4469 dynamic linker][fl].
4470 * The compiler gained many new extended error descriptions, which can
4471 be accessed with the `--explain` flag.
4472 * The `dropck` pass, which checks that destructors can't access
4473 destroyed values, [has been rewritten][dropck]. This fixes some
4474 soundness holes, and as such will cause some previously-compiling
4475 code to no longer build.
4476 * `rustc` now uses [LLVM to write archive files where possible][ar].
4477 Eventually this will eliminate the compiler's dependency on the ar
4479 * Rust has [preliminary support for i686 FreeBSD][fb] (it has long
4480 supported FreeBSD on x86_64).
4481 * The [`unused_mut`][lum], [`unconditional_recursion`][lur],
4482 [`improper_ctypes`][lic], and [`negate_unsigned`][lnu] lints are
4484 * If landing pads are disabled (with `-Z no-landing-pads`), [`panic!`
4485 will kill the process instead of leaking][nlp].
4487 [`Any`]: http://doc.rust-lang.org/nightly/std/any/trait.Any.html
4488 [`AtomicPtr`]: http://doc.rust-lang.org/nightly/std/sync/atomic/struct.AtomicPtr.html
4489 [`Borrow`]: http://doc.rust-lang.org/nightly/std/borrow/trait.Borrow.html
4490 [`CStr`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html
4491 [`CString`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html
4492 [`Debug`]: http://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
4493 [`DerefMut`]: http://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
4494 [`Deref`]: http://doc.rust-lang.org/nightly/std/ops/trait.Deref.html
4495 [`Div`]: http://doc.rust-lang.org/nightly/std/ops/trait.Div.html
4496 [`Duration`]: http://doc.rust-lang.org/nightly/std/time/struct.Duration.html
4497 [`Error`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html
4498 [`File`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html
4499 [`Hash`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html
4500 [`Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
4501 [`Send`]: http://doc.rust-lang.org/nightly/std/marker/trait.Send.html
4502 [`SliceConcatExt`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html
4503 [`Stdin`]: http://doc.rust-lang.org/nightly/std/io/struct.Stdin.html
4504 [`ToOwned`]: http://doc.rust-lang.org/nightly/std/borrow/trait.ToOwned.html
4505 [`Wrapping`]: http://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
4506 [`connect`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.connect
4507 [`downcast_mut`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_mut
4508 [`downcast_ref`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_ref
4509 [`downcast`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast
4510 [`hash_slice`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
4511 [`id`]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html#method.id
4512 [`is`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.is
4513 [`join`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.join
4514 [`read_to_end`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_to_end
4515 [ar]: https://github.com/rust-lang/rust/pull/26926
4516 [b14]: https://static.rust-lang.org/dist/rust-beta-x86_64-pc-windows-msvc.msi
4517 [dms]: https://github.com/rust-lang/rust/pull/26241
4518 [dropck]: https://github.com/rust-lang/rust/pull/27261
4519 [dropckrfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
4520 [ds]: https://github.com/rust-lang/rust/pull/26818
4521 [dst1]: http://doc.rust-lang.org/nightly/std/mem/fn.size_of_val.html
4522 [dst2]: http://doc.rust-lang.org/nightly/std/mem/fn.align_of_val.html
4523 [dst3]: https://github.com/rust-lang/rust/pull/27351
4524 [e]: https://github.com/rust-lang/rust/pull/24793
4525 [f]: https://github.com/rust-lang/rust/pull/26588
4526 [fb]: https://github.com/rust-lang/rust/pull/26959
4527 [fl]: https://github.com/rust-lang/rust-installer/pull/41
4528 [hs]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
4529 [ie]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html
4530 [iec]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.cause
4531 [iegm]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_mut
4532 [iegr]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_ref
4533 [ieii]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.into_inner
4534 [lic]: https://github.com/rust-lang/rust/pull/26583
4535 [lnu]: https://github.com/rust-lang/rust/pull/27026
4536 [lr]: https://github.com/rust-lang/rust/issues/27248
4537 [lum]: https://github.com/rust-lang/rust/pull/26378
4538 [lur]: https://github.com/rust-lang/rust/pull/26783
4539 [nlp]: https://github.com/rust-lang/rust/pull/27176
4540 [nold2]: https://github.com/rust-lang/rust/pull/27045
4541 [nold]: https://github.com/rust-lang/rfcs/blob/master/text/1156-adjust-default-object-bounds.md
4542 [nom]: http://doc.rust-lang.org/nightly/nomicon/
4543 [pc]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html
4544 [pi]: https://github.com/rust-lang/rust/pull/26699
4545 [ps]: https://github.com/rust-lang/rust/pull/26884
4546 [rte]: https://github.com/rust-lang/rust/pull/26950
4547 [sc]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.contains
4548 [search]: https://github.com/rust-lang/rust/pull/26327
4549 [sew]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.ends_with
4550 [sf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.find
4551 [sh]: https://github.com/rust-lang/rust/pull/27280
4552 [srf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rfind
4553 [ss]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split
4554 [ssw]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.starts_with
4555 [st]: https://github.com/rust-lang/rust/pull/26630
4556 [win1]: https://github.com/rust-lang/rust/pull/26569
4557 [win2]: https://github.com/rust-lang/rust/pull/26741
4558 [win3]: https://github.com/rust-lang/rust/pull/26741
4559 [win4]: https://github.com/rust-lang/rust/pull/27210
4560 [xp]: https://github.com/rust-lang/rust/pull/26569
4562 Version 1.2.0 (2015-08-07)
4563 ==========================
4565 * ~1200 changes, numerous bugfixes
4570 * [Dynamically-sized-type coercions][dst] allow smart pointer types
4571 like `Rc` to contain types without a fixed size, arrays and trait
4572 objects, finally enabling use of `Rc<[T]>` and completing the
4573 implementation of DST.
4574 * [Parallel codegen][parcodegen] is now working again, which can
4575 substantially speed up large builds in debug mode; It also gets
4576 another ~33% speedup when bootstrapping on a 4 core machine (using 8
4577 jobs). It's not enabled by default, but will be "in the near
4578 future". It can be activated with the `-C codegen-units=N` flag to
4580 * This is the first release with [experimental support for linking
4581 with the MSVC linker and lib C on Windows (instead of using the GNU
4582 variants via MinGW)][win]. It is yet recommended only for the most
4583 intrepid Rustaceans.
4584 * Benchmark compilations are showing a 30% improvement in
4585 bootstrapping over 1.1.
4590 * The [`to_uppercase`] and [`to_lowercase`] methods on `char` now do
4591 unicode case mapping, which is a previously-planned change in
4592 behavior and considered a bugfix.
4593 * [`mem::align_of`] now specifies [the *minimum alignment* for
4594 T][align], which is usually the alignment programs are interested
4595 in, and the same value reported by clang's
4596 `alignof`. [`mem::min_align_of`] is deprecated. This is not known to
4598 * [The `#[packed]` attribute is no longer silently accepted by the
4599 compiler][packed]. This attribute did nothing and code that
4600 mentioned it likely did not work as intended.
4601 * Associated type defaults are [now behind the
4602 `associated_type_defaults` feature gate][ad]. In 1.1 associated type
4603 defaults *did not work*, but could be mentioned syntactically. As
4604 such this breakage has minimal impact.
4609 * Patterns with `ref mut` now correctly invoke [`DerefMut`] when
4610 matching against dereferencable values.
4615 * The [`Extend`] trait, which grows a collection from an iterator, is
4616 implemented over iterators of references, for `String`, `Vec`,
4617 `LinkedList`, `VecDeque`, `EnumSet`, `BinaryHeap`, `VecMap`,
4618 `BTreeSet` and `BTreeMap`. [RFC][extend-rfc].
4619 * The [`iter::once`] function returns an iterator that yields a single
4620 element, and [`iter::empty`] returns an iterator that yields no
4622 * The [`matches`] and [`rmatches`] methods on `str` return iterators
4623 over substring matches.
4624 * [`Cell`] and [`RefCell`] both implement `Eq`.
4625 * A number of methods for wrapping arithmetic are added to the
4626 integral types, [`wrapping_div`], [`wrapping_rem`],
4627 [`wrapping_neg`], [`wrapping_shl`], [`wrapping_shr`]. These are in
4628 addition to the existing [`wrapping_add`], [`wrapping_sub`], and
4629 [`wrapping_mul`] methods, and alternatives to the [`Wrapping`]
4630 type.. It is illegal for the default arithmetic operations in Rust
4631 to overflow; the desire to wrap must be explicit.
4632 * The `{:#?}` formatting specifier [displays the alternate,
4633 pretty-printed][debugfmt] form of the `Debug` formatter. This
4634 feature was actually introduced prior to 1.0 with little
4636 * [`fmt::Formatter`] implements [`fmt::Write`], a `fmt`-specific trait
4637 for writing data to formatted strings, similar to [`io::Write`].
4638 * [`fmt::Formatter`] adds 'debug builder' methods, [`debug_struct`],
4639 [`debug_tuple`], [`debug_list`], [`debug_set`], [`debug_map`]. These
4640 are used by code generators to emit implementations of [`Debug`].
4641 * `str` has new [`to_uppercase`][strup] and [`to_lowercase`][strlow]
4642 methods that convert case, following Unicode case mapping.
4643 * It is now easier to handle poisoned locks. The [`PoisonError`]
4644 type, returned by failing lock operations, exposes `into_inner`,
4645 `get_ref`, and `get_mut`, which all give access to the inner lock
4646 guard, and allow the poisoned lock to continue to operate. The
4647 `is_poisoned` method of [`RwLock`] and [`Mutex`] can poll for a
4648 poisoned lock without attempting to take the lock.
4649 * On Unix the [`FromRawFd`] trait is implemented for [`Stdio`], and
4650 [`AsRawFd`] for [`ChildStdin`], [`ChildStdout`], [`ChildStderr`].
4651 On Windows the `FromRawHandle` trait is implemented for `Stdio`,
4652 and `AsRawHandle` for `ChildStdin`, `ChildStdout`,
4654 * [`io::ErrorKind`] has a new variant, `InvalidData`, which indicates
4660 * `rustc` employs smarter heuristics for guessing at [typos].
4661 * `rustc` emits more efficient code for [no-op conversions between
4662 unsafe pointers][nop].
4663 * Fat pointers are now [passed in pairs of immediate arguments][fat],
4664 resulting in faster compile times and smaller code.
4666 [`Extend`]: https://doc.rust-lang.org/nightly/std/iter/trait.Extend.html
4667 [extend-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
4668 [`iter::once`]: https://doc.rust-lang.org/nightly/std/iter/fn.once.html
4669 [`iter::empty`]: https://doc.rust-lang.org/nightly/std/iter/fn.empty.html
4670 [`matches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.matches
4671 [`rmatches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatches
4672 [`Cell`]: https://doc.rust-lang.org/nightly/std/cell/struct.Cell.html
4673 [`RefCell`]: https://doc.rust-lang.org/nightly/std/cell/struct.RefCell.html
4674 [`wrapping_add`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_add
4675 [`wrapping_sub`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_sub
4676 [`wrapping_mul`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_mul
4677 [`wrapping_div`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_div
4678 [`wrapping_rem`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_rem
4679 [`wrapping_neg`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_neg
4680 [`wrapping_shl`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shl
4681 [`wrapping_shr`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shr
4682 [`Wrapping`]: https://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
4683 [`fmt::Formatter`]: https://doc.rust-lang.org/nightly/std/fmt/struct.Formatter.html
4684 [`fmt::Write`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Write.html
4685 [`io::Write`]: https://doc.rust-lang.org/nightly/std/io/trait.Write.html
4686 [`debug_struct`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_struct
4687 [`debug_tuple`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_tuple
4688 [`debug_list`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_list
4689 [`debug_set`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_set
4690 [`debug_map`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_map
4691 [`Debug`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
4692 [strup]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_uppercase
4693 [strlow]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_lowercase
4694 [`to_uppercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_uppercase
4695 [`to_lowercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_lowercase
4696 [`PoisonError`]: https://doc.rust-lang.org/nightly/std/sync/struct.PoisonError.html
4697 [`RwLock`]: https://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html
4698 [`Mutex`]: https://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html
4699 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
4700 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
4701 [`Stdio`]: https://doc.rust-lang.org/nightly/std/process/struct.Stdio.html
4702 [`ChildStdin`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdin.html
4703 [`ChildStdout`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdout.html
4704 [`ChildStderr`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStderr.html
4705 [`io::ErrorKind`]: https://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html
4706 [debugfmt]: https://www.reddit.com/r/rust/comments/3ceaui/psa_produces_prettyprinted_debug_output/
4707 [`DerefMut`]: https://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
4708 [`mem::align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.align_of.html
4709 [align]: https://github.com/rust-lang/rust/pull/25646
4710 [`mem::min_align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.min_align_of.html
4711 [typos]: https://github.com/rust-lang/rust/pull/26087
4712 [nop]: https://github.com/rust-lang/rust/pull/26336
4713 [fat]: https://github.com/rust-lang/rust/pull/26411
4714 [dst]: https://github.com/rust-lang/rfcs/blob/master/text/0982-dst-coercion.md
4715 [parcodegen]: https://github.com/rust-lang/rust/pull/26018
4716 [packed]: https://github.com/rust-lang/rust/pull/25541
4717 [ad]: https://github.com/rust-lang/rust/pull/27382
4718 [win]: https://github.com/rust-lang/rust/pull/25350
4720 Version 1.1.0 (2015-06-25)
4721 =========================
4723 * ~850 changes, numerous bugfixes
4728 * The [`std::fs` module has been expanded][fs] to expand the set of
4729 functionality exposed:
4730 * `DirEntry` now supports optimizations like `file_type` and `metadata` which
4731 don't incur a syscall on some platforms.
4732 * A `symlink_metadata` function has been added.
4733 * The `fs::Metadata` structure now lowers to its OS counterpart, providing
4734 access to all underlying information.
4735 * The compiler now contains extended explanations of many errors. When an error
4736 with an explanation occurs the compiler suggests using the `--explain` flag
4737 to read the explanation. Error explanations are also [available online][err-index].
4738 * Thanks to multiple [improvements][sk] to [type checking][pre], as
4739 well as other work, the time to bootstrap the compiler decreased by
4745 * The [`str::split_whitespace`] method splits a string on unicode
4746 whitespace boundaries.
4747 * On both Windows and Unix, new extension traits provide conversion of
4748 I/O types to and from the underlying system handles. On Unix, these
4749 traits are [`FromRawFd`] and [`AsRawFd`], on Windows `FromRawHandle`
4750 and `AsRawHandle`. These are implemented for `File`, `TcpStream`,
4751 `TcpListener`, and `UpdSocket`. Further implementations for
4752 `std::process` will be stabilized later.
4753 * On Unix, [`std::os::unix::symlink`] creates symlinks. On
4754 Windows, symlinks can be created with
4755 `std::os::windows::symlink_dir` and
4756 `std::os::windows::symlink_file`.
4757 * The `mpsc::Receiver` type can now be converted into an iterator with
4758 `into_iter` on the [`IntoIterator`] trait.
4759 * `Ipv4Addr` can be created from `u32` with the `From<u32>`
4760 implementation of the [`From`] trait.
4761 * The `Debug` implementation for `RangeFull` [creates output that is
4762 more consistent with other implementations][rf].
4763 * [`Debug` is implemented for `File`][file].
4764 * The `Default` implementation for `Arc` [no longer requires `Sync +
4766 * [The `Iterator` methods `count`, `nth`, and `last` have been
4767 overridden for slices to have O(1) performance instead of O(n)][si].
4768 * Incorrect handling of paths on Windows has been improved in both the
4769 compiler and the standard library.
4770 * [`AtomicPtr` gained a `Default` implementation][ap].
4771 * In accordance with Rust's policy on arithmetic overflow `abs` now
4772 [panics on overflow when debug assertions are enabled][abs].
4773 * The [`Cloned`] iterator, which was accidentally left unstable for
4774 1.0 [has been stabilized][c].
4775 * The [`Incoming`] iterator, which iterates over incoming TCP
4776 connections, and which was accidentally unnamable in 1.0, [is now
4777 properly exported][inc].
4778 * [`BinaryHeap`] no longer corrupts itself [when functions called by
4779 `sift_up` or `sift_down` panic][bh].
4780 * The [`split_off`] method of `LinkedList` [no longer corrupts
4781 the list in certain scenarios][ll].
4786 * Type checking performance [has improved notably][sk] with
4787 [multiple improvements][pre].
4788 * The compiler [suggests code changes][ch] for more errors.
4789 * rustc and it's build system have experimental support for [building
4790 toolchains against MUSL][m] instead of glibc on Linux.
4791 * The compiler defines the `target_env` cfg value, which is used for
4792 distinguishing toolchains that are otherwise for the same
4793 platform. Presently this is set to `gnu` for common GNU Linux
4794 targets and for MinGW targets, and `musl` for MUSL Linux targets.
4795 * The [`cargo rustc`][crc] command invokes a build with custom flags
4797 * [Android executables are always position independent][pie].
4798 * [The `drop_with_repr_extern` lint warns about mixing `repr(C)`
4801 [`str::split_whitespace`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_whitespace
4802 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
4803 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
4804 [`std::os::unix::symlink`]: https://doc.rust-lang.org/nightly/std/os/unix/fs/fn.symlink.html
4805 [`IntoIterator`]: https://doc.rust-lang.org/nightly/std/iter/trait.IntoIterator.html
4806 [`From`]: https://doc.rust-lang.org/nightly/std/convert/trait.From.html
4807 [rf]: https://github.com/rust-lang/rust/pull/24491
4808 [err-index]: https://doc.rust-lang.org/error-index.html
4809 [sk]: https://github.com/rust-lang/rust/pull/24615
4810 [pre]: https://github.com/rust-lang/rust/pull/25323
4811 [file]: https://github.com/rust-lang/rust/pull/24598
4812 [ch]: https://github.com/rust-lang/rust/pull/24683
4813 [arc]: https://github.com/rust-lang/rust/pull/24695
4814 [si]: https://github.com/rust-lang/rust/pull/24701
4815 [ap]: https://github.com/rust-lang/rust/pull/24834
4816 [m]: https://github.com/rust-lang/rust/pull/24777
4817 [fs]: https://github.com/rust-lang/rfcs/blob/master/text/1044-io-fs-2.1.md
4818 [crc]: https://github.com/rust-lang/cargo/pull/1568
4819 [pie]: https://github.com/rust-lang/rust/pull/24953
4820 [abs]: https://github.com/rust-lang/rust/pull/25441
4821 [c]: https://github.com/rust-lang/rust/pull/25496
4822 [`Cloned`]: https://doc.rust-lang.org/nightly/std/iter/struct.Cloned.html
4823 [`Incoming`]: https://doc.rust-lang.org/nightly/std/net/struct.Incoming.html
4824 [inc]: https://github.com/rust-lang/rust/pull/25522
4825 [bh]: https://github.com/rust-lang/rust/pull/25856
4826 [`BinaryHeap`]: https://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html
4827 [ll]: https://github.com/rust-lang/rust/pull/26022
4828 [`split_off`]: https://doc.rust-lang.org/nightly/collections/linked_list/struct.LinkedList.html#method.split_off
4829 [drop]: https://github.com/rust-lang/rust/pull/24935
4831 Version 1.0.0 (2015-05-15)
4832 ========================
4834 * ~1500 changes, numerous bugfixes
4839 * The vast majority of the standard library is now `#[stable]`. It is
4840 no longer possible to use unstable features with a stable build of
4842 * Many popular crates on [crates.io] now work on the stable release
4844 * Arithmetic on basic integer types now [checks for overflow in debug
4850 * Several [restrictions have been added to trait coherence][coh] in
4851 order to make it easier for upstream authors to change traits
4852 without breaking downstream code.
4853 * Digits of binary and octal literals are [lexed more eagerly][lex] to
4854 improve error messages and macro behavior. For example, `0b1234` is
4855 now lexed as `0b1234` instead of two tokens, `0b1` and `234`.
4856 * Trait bounds [are always invariant][inv], eliminating the need for
4857 the `PhantomFn` and `MarkerTrait` lang items, which have been
4859 * ["-" is no longer a valid character in crate names][cr], the `extern crate
4860 "foo" as bar` syntax has been replaced with `extern crate foo as
4861 bar`, and Cargo now automatically translates "-" in *package* names
4862 to underscore for the crate name.
4863 * [Lifetime shadowing is an error][lt].
4864 * [`Send` no longer implies `'static`][send-rfc].
4865 * [UFCS now supports trait-less associated paths][moar-ufcs] like
4866 `MyType::default()`.
4867 * Primitive types [now have inherent methods][prim-inherent],
4868 obviating the need for extension traits like `SliceExt`.
4869 * Methods with `Self: Sized` in their `where` clause are [considered
4870 object-safe][self-sized], allowing many extension traits like
4871 `IteratorExt` to be merged into the traits they extended.
4872 * You can now [refer to associated types][assoc-where] whose
4873 corresponding trait bounds appear only in a `where` clause.
4874 * The final bits of [OIBIT landed][oibit-final], meaning that traits
4875 like `Send` and `Sync` are now library-defined.
4876 * A [Reflect trait][reflect] was introduced, which means that
4877 downcasting via the `Any` trait is effectively limited to concrete
4878 types. This helps retain the potentially-important "parametricity"
4879 property: generic code cannot behave differently for different type
4880 arguments except in minor ways.
4881 * The `unsafe_destructor` feature is now deprecated in favor of the
4882 [new `dropck`][dropck]. This change is a major reduction in unsafe
4888 * The `thread_local` module [has been renamed to `std::thread`][th].
4889 * The methods of `IteratorExt` [have been moved to the `Iterator`
4891 * Several traits that implement Rust's conventions for type
4892 conversions, `AsMut`, `AsRef`, `From`, and `Into` have been
4893 [centralized in the `std::convert` module][con].
4894 * The `FromError` trait [was removed in favor of `From`][fe].
4895 * The basic sleep function [has moved to
4896 `std::thread::sleep_ms`][slp].
4897 * The `splitn` function now takes an `n` parameter that represents the
4898 number of items yielded by the returned iterator [instead of the
4899 number of 'splits'][spl].
4900 * [On Unix, all file descriptors are `CLOEXEC` by default][clo].
4901 * [Derived implementations of `PartialOrd` now order enums according
4902 to their explicitly-assigned discriminants][po].
4903 * [Methods for searching strings are generic over `Pattern`s][pat],
4904 implemented presently by `&char`, `&str`, `FnMut(char) -> bool` and
4906 * [In method resolution, object methods are resolved before inherent
4908 * [`String::from_str` has been deprecated in favor of the `From` impl,
4909 `String::from`][sf].
4910 * [`io::Error` implements `Sync`][ios].
4911 * [The `words` method on `&str` has been replaced with
4912 `split_whitespace`][sw], to avoid answering the tricky question, 'what is
4914 * The new path and IO modules are complete and `#[stable]`. This
4915 was the major library focus for this cycle.
4916 * The path API was [revised][path-normalize] to normalize `.`,
4917 adjusting the tradeoffs in favor of the most common usage.
4918 * A large number of remaining APIs in `std` were also stabilized
4919 during this cycle; about 75% of the non-deprecated API surface
4921 * The new [string pattern API][string-pattern] landed, which makes
4922 the string slice API much more internally consistent and flexible.
4923 * A new set of [generic conversion traits][conversion] replaced
4924 many existing ad hoc traits.
4925 * Generic numeric traits were [completely removed][num-traits]. This
4926 was made possible thanks to inherent methods for primitive types,
4927 and the removal gives maximal flexibility for designing a numeric
4928 hierarchy in the future.
4929 * The `Fn` traits are now related via [inheritance][fn-inherit]
4930 and provide ergonomic [blanket implementations][fn-blanket].
4931 * The `Index` and `IndexMut` traits were changed to
4932 [take the index by value][index-value], enabling code like
4933 `hash_map["string"]` to work.
4934 * `Copy` now [inherits][copy-clone] from `Clone`, meaning that all
4935 `Copy` data is known to be `Clone` as well.
4940 * Many errors now have extended explanations that can be accessed with
4941 the `--explain` flag to `rustc`.
4942 * Many new examples have been added to the standard library
4944 * rustdoc has received a number of improvements focused on completion
4946 * Metadata was tuned, shrinking binaries [by 27%][metadata-shrink].
4947 * Much headway was made on ecosystem-wide CI, making it possible
4948 to [compare builds for breakage][ci-compare].
4951 [crates.io]: http://crates.io
4952 [clo]: https://github.com/rust-lang/rust/pull/24034
4953 [coh]: https://github.com/rust-lang/rfcs/blob/master/text/1023-rebalancing-coherence.md
4954 [con]: https://github.com/rust-lang/rust/pull/23875
4955 [cr]: https://github.com/rust-lang/rust/pull/23419
4956 [fe]: https://github.com/rust-lang/rust/pull/23879
4957 [ie]: https://github.com/rust-lang/rust/pull/23300
4958 [inv]: https://github.com/rust-lang/rust/pull/23938
4959 [ios]: https://github.com/rust-lang/rust/pull/24133
4960 [lex]: https://github.com/rust-lang/rfcs/blob/master/text/0879-small-base-lexing.md
4961 [lt]: https://github.com/rust-lang/rust/pull/24057
4962 [meth]: https://github.com/rust-lang/rust/pull/24056
4963 [pat]: https://github.com/rust-lang/rfcs/blob/master/text/0528-string-patterns.md
4964 [po]: https://github.com/rust-lang/rust/pull/24270
4965 [sf]: https://github.com/rust-lang/rust/pull/24517
4966 [slp]: https://github.com/rust-lang/rust/pull/23949
4967 [spl]: https://github.com/rust-lang/rfcs/blob/master/text/0979-align-splitn-with-other-languages.md
4968 [sw]: https://github.com/rust-lang/rfcs/blob/master/text/1054-str-words.md
4969 [th]: https://github.com/rust-lang/rfcs/blob/master/text/0909-move-thread-local-to-std-thread.md
4970 [send-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0458-send-improvements.md
4971 [moar-ufcs]: https://github.com/rust-lang/rust/pull/22172
4972 [prim-inherent]: https://github.com/rust-lang/rust/pull/23104
4973 [overflow]: https://github.com/rust-lang/rfcs/blob/master/text/0560-integer-overflow.md
4974 [metadata-shrink]: https://github.com/rust-lang/rust/pull/22971
4975 [self-sized]: https://github.com/rust-lang/rust/pull/22301
4976 [assoc-where]: https://github.com/rust-lang/rust/pull/22512
4977 [string-pattern]: https://github.com/rust-lang/rust/pull/22466
4978 [oibit-final]: https://github.com/rust-lang/rust/pull/21689
4979 [reflect]: https://github.com/rust-lang/rust/pull/23712
4980 [conversion]: https://github.com/rust-lang/rfcs/pull/529
4981 [num-traits]: https://github.com/rust-lang/rust/pull/23549
4982 [index-value]: https://github.com/rust-lang/rust/pull/23601
4983 [dropck]: https://github.com/rust-lang/rfcs/pull/769
4984 [ci-compare]: https://gist.github.com/brson/a30a77836fbec057cbee
4985 [fn-inherit]: https://github.com/rust-lang/rust/pull/23282
4986 [fn-blanket]: https://github.com/rust-lang/rust/pull/23895
4987 [copy-clone]: https://github.com/rust-lang/rust/pull/23860
4988 [path-normalize]: https://github.com/rust-lang/rust/pull/23229
4991 Version 1.0.0-alpha.2 (2015-02-20)
4992 =====================================
4994 * ~1300 changes, numerous bugfixes
4998 * The various I/O modules were [overhauled][io-rfc] to reduce
4999 unnecessary abstractions and provide better interoperation with
5000 the underlying platform. The old `io` module remains temporarily
5002 * The standard library now [participates in feature gating][feat],
5003 so use of unstable libraries now requires a `#![feature(...)]`
5004 attribute. The impact of this change is [described on the
5005 forum][feat-forum]. [RFC][feat-rfc].
5009 * `for` loops [now operate on the `IntoIterator` trait][into],
5010 which eliminates the need to call `.iter()`, etc. to iterate
5011 over collections. There are some new subtleties to remember
5012 though regarding what sort of iterators various types yield, in
5013 particular that `for foo in bar { }` yields values from a move
5014 iterator, destroying the original collection. [RFC][into-rfc].
5015 * Objects now have [default lifetime bounds][obj], so you don't
5016 have to write `Box<Trait+'static>` when you don't care about
5017 storing references. [RFC][obj-rfc].
5018 * In types that implement `Drop`, [lifetimes must outlive the
5019 value][drop]. This will soon make it possible to safely
5020 implement `Drop` for types where `#[unsafe_destructor]` is now
5021 required. Read the [gorgeous RFC][drop-rfc] for details.
5022 * The fully qualified <T as Trait>::X syntax lets you set the Self
5023 type for a trait method or associated type. [RFC][ufcs-rfc].
5024 * References to types that implement `Deref<U>` now [automatically
5025 coerce to references][deref] to the dereferenced type `U`,
5026 e.g. `&T where T: Deref<U>` automatically coerces to `&U`. This
5027 should eliminate many unsightly uses of `&*`, as when converting
5028 from references to vectors into references to
5029 slices. [RFC][deref-rfc].
5030 * The explicit [closure kind syntax][close] (`|&:|`, `|&mut:|`,
5031 `|:|`) is obsolete and closure kind is inferred from context.
5032 * [`Self` is a keyword][Self].
5036 * The `Show` and `String` formatting traits [have been
5037 renamed][fmt] to `Debug` and `Display` to more clearly reflect
5038 their related purposes. Automatically getting a string
5039 conversion to use with `format!("{:?}", something_to_debug)` is
5040 now written `#[derive(Debug)]`.
5041 * Abstract [OS-specific string types][osstr], `std::ff::{OsString,
5042 OsStr}`, provide strings in platform-specific encodings for easier
5043 interop with system APIs. [RFC][osstr-rfc].
5044 * The `boxed::into_raw` and `Box::from_raw` functions [convert
5045 between `Box<T>` and `*mut T`][boxraw], a common pattern for
5046 creating raw pointers.
5050 * Certain long error messages of the form 'expected foo found bar'
5051 are now [split neatly across multiple
5052 lines][multiline]. Examples in the PR.
5053 * On Unix Rust can be [uninstalled][un] by running
5054 `/usr/local/lib/rustlib/uninstall.sh`.
5055 * The `#[rustc_on_unimplemented]` attribute, requiring the
5056 'on_unimplemented' feature, lets rustc [display custom error
5057 messages when a trait is expected to be implemented for a type
5062 * Rust is tested against a [LALR grammar][lalr], which parses
5063 almost all the Rust files that rustc does.
5065 [boxraw]: https://github.com/rust-lang/rust/pull/21318
5066 [close]: https://github.com/rust-lang/rust/pull/21843
5067 [deref]: https://github.com/rust-lang/rust/pull/21351
5068 [deref-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0241-deref-conversions.md
5069 [drop]: https://github.com/rust-lang/rust/pull/21972
5070 [drop-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
5071 [feat]: https://github.com/rust-lang/rust/pull/21248
5072 [feat-forum]: https://users.rust-lang.org/t/psa-important-info-about-rustcs-new-feature-staging/82/5
5073 [feat-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0507-release-channels.md
5074 [fmt]: https://github.com/rust-lang/rust/pull/21457
5075 [into]: https://github.com/rust-lang/rust/pull/20790
5076 [into-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md#intoiterator-and-iterable
5077 [io-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
5078 [lalr]: https://github.com/rust-lang/rust/pull/21452
5079 [multiline]: https://github.com/rust-lang/rust/pull/19870
5080 [obj]: https://github.com/rust-lang/rust/pull/22230
5081 [obj-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0599-default-object-bound.md
5082 [onun]: https://github.com/rust-lang/rust/pull/20889
5083 [osstr]: https://github.com/rust-lang/rust/pull/21488
5084 [osstr-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
5085 [Self]: https://github.com/rust-lang/rust/pull/22158
5086 [ufcs-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0132-ufcs.md
5087 [un]: https://github.com/rust-lang/rust/pull/22256
5090 Version 1.0.0-alpha (2015-01-09)
5091 ==================================
5093 * ~2400 changes, numerous bugfixes
5097 * The language itself is considered feature complete for 1.0,
5098 though there will be many usability improvements and bugfixes
5099 before the final release.
5100 * Nearly 50% of the public API surface of the standard library has
5101 been declared 'stable'. Those interfaces are unlikely to change
5103 * The long-running debate over integer types has been
5104 [settled][ints]: Rust will ship with types named `isize` and
5105 `usize`, rather than `int` and `uint`, for pointer-sized
5106 integers. Guidelines will be rolled out during the alpha cycle.
5107 * Most crates that are not `std` have been moved out of the Rust
5108 distribution into the Cargo ecosystem so they can evolve
5109 separately and don't need to be stabilized as quickly, including
5110 'time', 'getopts', 'num', 'regex', and 'term'.
5111 * Documentation continues to be expanded with more API coverage, more
5112 examples, and more in-depth explanations. The guides have been
5113 consolidated into [The Rust Programming Language][trpl].
5114 * "[Rust By Example][rbe]" is now maintained by the Rust team.
5115 * All official Rust binary installers now come with [Cargo], the
5116 Rust package manager.
5120 * Closures have been [completely redesigned][unboxed] to be
5121 implemented in terms of traits, can now be used as generic type
5122 bounds and thus monomorphized and inlined, or via an opaque
5123 pointer (boxed) as in the old system. The new system is often
5124 referred to as 'unboxed' closures.
5125 * Traits now support [associated types][assoc], allowing families
5126 of related types to be defined together and used generically in
5128 * Enum variants are [namespaced by their type names][enum].
5129 * [`where` clauses][where] provide a more versatile and attractive
5130 syntax for specifying generic bounds, though the previous syntax
5132 * Rust again picks a [fallback][fb] (either i32 or f64) for uninferred
5134 * Rust [no longer has a runtime][rt] of any description, and only
5135 supports OS threads, not green threads.
5136 * At long last, Rust has been overhauled for 'dynamically-sized
5137 types' ([DST]), which integrates 'fat pointers' (object types,
5138 arrays, and `str`) more deeply into the type system, making it
5140 * Rust now has a general [range syntax][range], `i..j`, `i..`, and
5141 `..j` that produce range types and which, when combined with the
5142 `Index` operator and multidispatch, leads to a convenient slice
5144 * The new range syntax revealed an ambiguity in the fixed-length
5145 array syntax, so now fixed length arrays [are written `[T;
5147 * The `Copy` trait is no longer implemented automatically. Unsafe
5148 pointers no longer implement `Sync` and `Send` so types
5149 containing them don't automatically either. `Sync` and `Send`
5150 are now 'unsafe traits' so one can "forcibly" implement them via
5151 `unsafe impl` if a type confirms to the requirements for them
5152 even though the internals do not (e.g. structs containing unsafe
5153 pointers like `Arc`). These changes are intended to prevent some
5154 footguns and are collectively known as [opt-in built-in
5155 traits][oibit] (though `Sync` and `Send` will soon become pure
5156 library types unknown to the compiler).
5157 * Operator traits now take their operands [by value][ops], and
5158 comparison traits can use multidispatch to compare one type
5159 against multiple other types, allowing e.g. `String` to be
5160 compared with `&str`.
5161 * `if let` and `while let` are no longer feature-gated.
5162 * Rust has adopted a more [uniform syntax for escaping unicode
5163 characters][unicode].
5164 * `macro_rules!` [has been declared stable][mac]. Though it is a
5165 flawed system it is sufficiently popular that it must be usable
5166 for 1.0. Effort has gone into [future-proofing][mac-future] it
5167 in ways that will allow other macro systems to be developed in
5168 parallel, and won't otherwise impact the evolution of the
5170 * The prelude has been [pared back significantly][prelude] such
5171 that it is the minimum necessary to support the most pervasive
5172 code patterns, and through [generalized where clauses][where]
5173 many of the prelude extension traits have been consolidated.
5174 * Rust's rudimentary reflection [has been removed][refl], as it
5175 incurred too much code generation for little benefit.
5176 * [Struct variants][structvars] are no longer feature-gated.
5177 * Trait bounds can be [polymorphic over lifetimes][hrtb]. Also
5178 known as 'higher-ranked trait bounds', this crucially allows
5179 unboxed closures to work.
5180 * Macros invocations surrounded by parens or square brackets and
5181 not terminated by a semicolon are [parsed as
5182 expressions][macros], which makes expressions like `vec![1i32,
5183 2, 3].len()` work as expected.
5184 * Trait objects now implement their traits automatically, and
5185 traits that can be coerced to objects now must be [object
5187 * Automatically deriving traits is now done with `#[derive(...)]`
5188 not `#[deriving(...)]` for [consistency with other naming
5189 conventions][derive].
5190 * Importing the containing module or enum at the same time as
5191 items or variants they contain is [now done with `self` instead
5192 of `mod`][self], as in use `foo::{self, bar}`
5193 * Glob imports are no longer feature-gated.
5194 * The `box` operator and `box` patterns have been feature-gated
5195 pending a redesign. For now unique boxes should be allocated
5196 like other containers, with `Box::new`.
5200 * A [series][coll1] of [efforts][coll2] to establish
5201 [conventions][coll3] for collections types has resulted in API
5202 improvements throughout the standard library.
5203 * New [APIs for error handling][err] provide ergonomic interop
5204 between error types, and [new conventions][err-conv] describe
5205 more clearly the recommended error handling strategies in Rust.
5206 * The `fail!` macro has been renamed to [`panic!`][panic] so that
5207 it is easier to discuss failure in the context of error handling
5208 without making clarifications as to whether you are referring to
5209 the 'fail' macro or failure more generally.
5210 * On Linux, `OsRng` prefers the new, more reliable `getrandom`
5211 syscall when available.
5212 * The 'serialize' crate has been renamed 'rustc-serialize' and
5213 moved out of the distribution to Cargo. Although it is widely
5214 used now, it is expected to be superseded in the near future.
5215 * The `Show` formatter, typically implemented with
5216 `#[derive(Show)]` is [now requested with the `{:?}`
5217 specifier][show] and is intended for use by all types, for uses
5218 such as `println!` debugging. The new `String` formatter must be
5219 implemented by hand, uses the `{}` specifier, and is intended
5220 for full-fidelity conversions of things that can logically be
5221 represented as strings.
5225 * [Flexible target specification][flex] allows rustc's code
5226 generation to be configured to support otherwise-unsupported
5228 * Rust comes with rust-gdb and rust-lldb scripts that launch their
5229 respective debuggers with Rust-appropriate pretty-printing.
5230 * The Windows installation of Rust is distributed with the
5231 MinGW components currently required to link binaries on that
5236 * Nullable enum optimizations have been extended to more types so
5237 that e.g. `Option<Vec<T>>` and `Option<String>` take up no more
5238 space than the inner types themselves.
5239 * Work has begun on supporting AArch64.
5241 [Cargo]: https://crates.io
5242 [unboxed]: http://smallcultfollowing.com/babysteps/blog/2014/11/26/purging-proc/
5243 [enum]: https://github.com/rust-lang/rfcs/blob/master/text/0390-enum-namespacing.md
5244 [flex]: https://github.com/rust-lang/rfcs/blob/master/text/0131-target-specification.md
5245 [err]: https://github.com/rust-lang/rfcs/blob/master/text/0201-error-chaining.md
5246 [err-conv]: https://github.com/rust-lang/rfcs/blob/master/text/0236-error-conventions.md
5247 [rt]: https://github.com/rust-lang/rfcs/blob/master/text/0230-remove-runtime.md
5248 [mac]: https://github.com/rust-lang/rfcs/blob/master/text/0453-macro-reform.md
5249 [mac-future]: https://github.com/rust-lang/rfcs/pull/550
5250 [DST]: http://smallcultfollowing.com/babysteps/blog/2014/01/05/dst-take-5/
5251 [coll1]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md
5252 [coll2]: https://github.com/rust-lang/rfcs/blob/master/text/0509-collections-reform-part-2.md
5253 [coll3]: https://github.com/rust-lang/rfcs/blob/master/text/0216-collection-views.md
5254 [ops]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md
5255 [prelude]: https://github.com/rust-lang/rfcs/blob/master/text/0503-prelude-stabilization.md
5256 [where]: https://github.com/rust-lang/rfcs/blob/master/text/0135-where.md
5257 [refl]: https://github.com/rust-lang/rfcs/blob/master/text/0379-remove-reflection.md
5258 [panic]: https://github.com/rust-lang/rfcs/blob/master/text/0221-panic.md
5259 [structvars]: https://github.com/rust-lang/rfcs/blob/master/text/0418-struct-variants.md
5260 [hrtb]: https://github.com/rust-lang/rfcs/blob/master/text/0387-higher-ranked-trait-bounds.md
5261 [unicode]: https://github.com/rust-lang/rfcs/blob/master/text/0446-es6-unicode-escapes.md
5262 [oibit]: https://github.com/rust-lang/rfcs/blob/master/text/0019-opt-in-builtin-traits.md
5263 [macros]: https://github.com/rust-lang/rfcs/blob/master/text/0378-expr-macros.md
5264 [range]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md#indexing-and-slicing
5265 [arrays]: https://github.com/rust-lang/rfcs/blob/master/text/0520-new-array-repeat-syntax.md
5266 [show]: https://github.com/rust-lang/rfcs/blob/master/text/0504-show-stabilization.md
5267 [derive]: https://github.com/rust-lang/rfcs/blob/master/text/0534-deriving2derive.md
5268 [self]: https://github.com/rust-lang/rfcs/blob/master/text/0532-self-in-use.md
5269 [fb]: https://github.com/rust-lang/rfcs/blob/master/text/0212-restore-int-fallback.md
5270 [objsafe]: https://github.com/rust-lang/rfcs/blob/master/text/0255-object-safety.md
5271 [assoc]: https://github.com/rust-lang/rfcs/blob/master/text/0195-associated-items.md
5272 [ints]: https://github.com/rust-lang/rfcs/pull/544#issuecomment-68760871
5273 [trpl]: https://doc.rust-lang.org/book/index.html
5274 [rbe]: http://rustbyexample.com/
5277 Version 0.12.0 (2014-10-09)
5278 =============================
5280 * ~1900 changes, numerous bugfixes
5284 * The introductory documentation (now called The Rust Guide) has
5285 been completely rewritten, as have a number of supplementary
5287 * Rust's package manager, Cargo, continues to improve and is
5288 sometimes considered to be quite awesome.
5289 * Many API's in `std` have been reviewed and updated for
5290 consistency with the in-development Rust coding
5291 guidelines. The standard library documentation tracks
5292 stabilization progress.
5293 * Minor libraries have been moved out-of-tree to the rust-lang org
5294 on GitHub: uuid, semver, glob, num, hexfloat, fourcc. They can
5295 be installed with Cargo.
5296 * Lifetime elision allows lifetime annotations to be left off of
5297 function declarations in many common scenarios.
5298 * Rust now works on 64-bit Windows.
5301 * Indexing can be overloaded with the `Index` and `IndexMut`
5303 * The `if let` construct takes a branch only if the `let` pattern
5304 matches, currently behind the 'if_let' feature gate.
5305 * 'where clauses', a more flexible syntax for specifying trait
5306 bounds that is more aesthetic, have been added for traits and
5307 free functions. Where clauses will in the future make it
5308 possible to constrain associated types, which would be
5309 impossible with the existing syntax.
5310 * A new slicing syntax (e.g. `[0..4]`) has been introduced behind
5311 the 'slicing_syntax' feature gate, and can be overloaded with
5312 the `Slice` or `SliceMut` traits.
5313 * The syntax for matching of sub-slices has been changed to use a
5314 postfix `..` instead of prefix (.e.g. `[a, b, c..]`), for
5315 consistency with other uses of `..` and to future-proof
5316 potential additional uses of the syntax.
5317 * The syntax for matching inclusive ranges in patterns has changed
5318 from `0..3` to `0...4` to be consistent with the exclusive range
5320 * Matching of sub-slices in non-tail positions (e.g. `[a.., b,
5321 c]`) has been put behind the 'advanced_slice_patterns' feature
5322 gate and may be removed in the future.
5323 * Components of tuples and tuple structs can be extracted using
5324 the `value.0` syntax, currently behind the `tuple_indexing`
5326 * The `#[crate_id]` attribute is no longer supported; versioning
5327 is handled by the package manager.
5328 * Renaming crate imports are now written `extern crate foo as bar`
5329 instead of `extern crate bar = foo`.
5330 * Renaming use statements are now written `use foo as bar` instead
5332 * `let` and `match` bindings and argument names in macros are now
5334 * The new, more efficient, closure types ('unboxed closures') have
5335 been added under a feature gate, 'unboxed_closures'. These will
5336 soon replace the existing closure types, once higher-ranked
5337 trait lifetimes are added to the language.
5338 * `move` has been added as a keyword, for indicating closures
5339 that capture by value.
5340 * Mutation and assignment is no longer allowed in pattern guards.
5341 * Generic structs and enums can now have trait bounds.
5342 * The `Share` trait is now called `Sync` to free up the term
5343 'shared' to refer to 'shared reference' (the default reference
5345 * Dynamically-sized types have been mostly implemented,
5346 unifying the behavior of fat-pointer types with the rest of the
5348 * As part of dynamically-sized types, the `Sized` trait has been
5349 introduced, which qualifying types implement by default, and
5350 which type parameters expect by default. To specify that a type
5351 parameter does not need to be sized, write `<Sized? T>`. Most
5352 types are `Sized`, notable exceptions being unsized arrays
5353 (`[T]`) and trait types.
5354 * Closures can return `!`, as in `|| -> !` or `proc() -> !`.
5355 * Lifetime bounds can now be applied to type parameters and object
5357 * The old, reference counted GC type, `Gc<T>` which was once
5358 denoted by the `@` sigil, has finally been removed. GC will be
5359 revisited in the future.
5362 * Library documentation has been improved for a number of modules.
5363 * Bit-vectors, collections::bitv has been modernized.
5364 * The url crate is deprecated in favor of
5365 http://github.com/servo/rust-url, which can be installed with
5367 * Most I/O stream types can be cloned and subsequently closed from
5369 * A `std::time::Duration` type has been added for use in I/O
5370 methods that rely on timers, as well as in the 'time' crate's
5371 `Timespec` arithmetic.
5372 * The runtime I/O abstraction layer that enabled the green thread
5373 scheduler to do non-thread-blocking I/O has been removed, along
5374 with the libuv-based implementation employed by the green thread
5375 scheduler. This will greatly simplify the future I/O work.
5376 * `collections::btree` has been rewritten to have a more
5377 idiomatic and efficient design.
5380 * rustdoc output now indicates the stability levels of API's.
5381 * The `--crate-name` flag can specify the name of the crate
5382 being compiled, like `#[crate_name]`.
5383 * The `-C metadata` specifies additional metadata to hash into
5384 symbol names, and `-C extra-filename` specifies additional
5385 information to put into the output filename, for use by the
5386 package manager for versioning.
5387 * debug info generation has continued to improve and should be
5388 more reliable under both gdb and lldb.
5389 * rustc has experimental support for compiling in parallel
5390 using the `-C codegen-units` flag.
5391 * rustc no longer encodes rpath information into binaries by
5395 * Stack usage has been optimized with LLVM lifetime annotations.
5396 * Official Rust binaries on Linux are more compatible with older
5397 kernels and distributions, built on CentOS 5.10.
5400 Version 0.11.0 (2014-07-02)
5401 ==========================
5403 * ~1700 changes, numerous bugfixes
5406 * ~[T] has been removed from the language. This type is superseded by
5408 * ~str has been removed from the language. This type is superseded by
5410 * ~T has been removed from the language. This type is superseded by the
5412 * @T has been removed from the language. This type is superseded by the
5413 standard library's std::gc::Gc<T> type.
5414 * Struct fields are now all private by default.
5415 * Vector indices and shift amounts are both required to be a `uint`
5416 instead of any integral type.
5417 * Byte character, byte string, and raw byte string literals are now all
5418 supported by prefixing the normal literal with a `b`.
5419 * Multiple ABIs are no longer allowed in an ABI string
5420 * The syntax for lifetimes on closures/procedures has been tweaked
5421 slightly: `<'a>|A, B|: 'b + K -> T`
5422 * Floating point modulus has been removed from the language; however it
5423 is still provided by a library implementation.
5424 * Private enum variants are now disallowed.
5425 * The `priv` keyword has been removed from the language.
5426 * A closure can no longer be invoked through a &-pointer.
5427 * The `use foo, bar, baz;` syntax has been removed from the language.
5428 * The transmute intrinsic no longer works on type parameters.
5429 * Statics now allow blocks/items in their definition.
5430 * Trait bounds are separated from objects with + instead of : now.
5431 * Objects can no longer be read while they are mutably borrowed.
5432 * The address of a static is now marked as insignificant unless the
5433 #[inline(never)] attribute is placed it.
5434 * The #[unsafe_destructor] attribute is now behind a feature gate.
5435 * Struct literals are no longer allowed in ambiguous positions such as
5436 if, while, match, and for..in.
5437 * Declaration of lang items and intrinsics are now feature-gated by
5439 * Integral literals no longer default to `int`, and floating point
5440 literals no longer default to `f64`. Literals must be suffixed with an
5441 appropriate type if inference cannot determine the type of the
5443 * The Box<T> type is no longer implicitly borrowed to &mut T.
5444 * Procedures are now required to not capture borrowed references.
5447 * The standard library is now a "facade" over a number of underlying
5448 libraries. This means that development on the standard library should
5449 be speedier due to smaller crates, as well as a clearer line between
5451 * A new library, libcore, lives under the standard library's facade
5452 which is Rust's "0-assumption" library, suitable for embedded and
5453 kernel development for example.
5454 * A regex crate has been added to the standard distribution. This crate
5455 includes statically compiled regular expressions.
5456 * The unwrap/unwrap_err methods on Result require a Show bound for
5457 better error messages.
5458 * The return types of the std::comm primitives have been centralized
5459 around the Result type.
5460 * A number of I/O primitives have gained the ability to time out their
5462 * A number of I/O primitives have gained the ability to close their
5463 reading/writing halves to cancel pending operations.
5464 * Reverse iterator methods have been removed in favor of `rev()` on
5465 their forward-iteration counterparts.
5466 * A bitflags! macro has been added to enable easy interop with C and
5467 management of bit flags.
5468 * A debug_assert! macro is now provided which is disabled when
5469 `--cfg ndebug` is passed to the compiler.
5470 * A graphviz crate has been added for creating .dot files.
5471 * The std::cast module has been migrated into std::mem.
5472 * The std::local_data api has been migrated from freestanding functions
5473 to being based on methods.
5474 * The Pod trait has been renamed to Copy.
5475 * jemalloc has been added as the default allocator for types.
5476 * The API for allocating memory has been changed to use proper alignment
5477 and sized deallocation
5478 * Connecting a TcpStream or binding a TcpListener is now based on a
5479 string address and a u16 port. This allows connecting to a hostname as
5481 * The Reader trait now contains a core method, read_at_least(), which
5482 correctly handles many repeated 0-length reads.
5483 * The process-spawning API is now centered around a builder-style
5485 * The :? printing qualifier has been moved from the standard library to
5486 an external libdebug crate.
5487 * Eq/Ord have been renamed to PartialEq/PartialOrd. TotalEq/TotalOrd
5488 have been renamed to Eq/Ord.
5489 * The select/plural methods have been removed from format!. The escapes
5490 for { and } have also changed from \{ and \} to {{ and }},
5492 * The TaskBuilder API has been re-worked to be a true builder, and
5493 extension traits for spawning native/green tasks have been added.
5496 * All breaking changes to the language or libraries now have their
5497 commit message annotated with `[breaking-change]` to allow for easy
5498 discovery of breaking changes.
5499 * The compiler will now try to suggest how to annotate lifetimes if a
5500 lifetime-related error occurs.
5501 * Debug info continues to be improved greatly with general bug fixes and
5502 better support for situations like link time optimization (LTO).
5503 * Usage of syntax extensions when cross-compiling has been fixed.
5504 * Functionality equivalent to GCC & Clang's -ffunction-sections,
5505 -fdata-sections and --gc-sections has been enabled by default
5506 * The compiler is now stricter about where it will load module files
5507 from when a module is declared via `mod foo;`.
5508 * The #[phase(syntax)] attribute has been renamed to #[phase(plugin)].
5509 Syntax extensions are now discovered via a "plugin registrar" type
5510 which will be extended in the future to other various plugins.
5511 * Lints have been restructured to allow for dynamically loadable lints.
5512 * A number of rustdoc improvements:
5513 * The HTML output has been visually redesigned.
5514 * Markdown is now powered by hoedown instead of sundown.
5515 * Searching heuristics have been greatly improved.
5516 * The search index has been reduced in size by a great amount.
5517 * Cross-crate documentation via `pub use` has been greatly improved.
5518 * Primitive types are now hyperlinked and documented.
5519 * Documentation has been moved from static.rust-lang.org/doc to
5521 * A new sandbox, play.rust-lang.org, is available for running and
5522 sharing rust code examples on-line.
5523 * Unused attributes are now more robustly warned about.
5524 * The dead_code lint now warns about unused struct fields.
5525 * Cross-compiling to iOS is now supported.
5526 * Cross-compiling to mipsel is now supported.
5527 * Stability attributes are now inherited by default and no longer apply
5528 to intra-crate usage, only inter-crate usage.
5529 * Error message related to non-exhaustive match expressions have been
5533 Version 0.10 (2014-04-03)
5534 =========================
5536 * ~1500 changes, numerous bugfixes
5539 * A new RFC process is now in place for modifying the language.
5540 * Patterns with `@`-pointers have been removed from the language.
5541 * Patterns with unique vectors (`~[T]`) have been removed from the
5543 * Patterns with unique strings (`~str`) have been removed from the
5545 * `@str` has been removed from the language.
5546 * `@[T]` has been removed from the language.
5547 * `@self` has been removed from the language.
5548 * `@Trait` has been removed from the language.
5549 * Headers on `~` allocations which contain `@` boxes inside the type for
5550 reference counting have been removed.
5551 * The semantics around the lifetimes of temporary expressions have changed,
5552 see #3511 and #11585 for more information.
5553 * Cross-crate syntax extensions are now possible, but feature gated. See
5554 #11151 for more information. This includes both `macro_rules!` macros as
5555 well as syntax extensions such as `format!`.
5556 * New lint modes have been added, and older ones have been turned on to be
5558 * Unnecessary parentheses
5561 * Uppercase variables
5562 * Publicly visible private types
5563 * `#[deriving]` with raw pointers
5564 * Unsafe functions can no longer be coerced to closures.
5565 * Various obscure macros such as `log_syntax!` are now behind feature gates.
5566 * The `#[simd]` attribute is now behind a feature gate.
5567 * Visibility is no longer allowed on `extern crate` statements, and
5568 unnecessary visibility (`priv`) is no longer allowed on `use` statements.
5569 * Trailing commas are now allowed in argument lists and tuple patterns.
5570 * The `do` keyword has been removed, it is now a reserved keyword.
5571 * Default type parameters have been implemented, but are feature gated.
5572 * Borrowed variables through captures in closures are now considered soundly.
5573 * `extern mod` is now `extern crate`
5574 * The `Freeze` trait has been removed.
5575 * The `Share` trait has been added for types that can be shared among
5577 * Labels in macros are now hygienic.
5578 * Expression/statement macro invocations can be delimited with `{}` now.
5579 * Treatment of types allowed in `static mut` locations has been tweaked.
5580 * The `*` and `.` operators are now overloadable through the `Deref` and
5582 * `~Trait` and `proc` no longer have `Send` bounds by default.
5583 * Partial type hints are now supported with the `_` type marker.
5584 * An `Unsafe` type was introduced for interior mutability. It is now
5585 considered undefined to transmute from `&T` to `&mut T` without using the
5587 * The #[linkage] attribute was implemented for extern statics/functions.
5588 * The inner attribute syntax has changed from `#[foo];` to `#![foo]`.
5589 * `Pod` was renamed to `Copy`.
5592 * The `libextra` library has been removed. It has now been decomposed into
5593 component libraries with smaller and more focused nuggets of
5594 functionality. The full list of libraries can be found on the
5595 documentation index page.
5596 * std: `std::condition` has been removed. All I/O errors are now propagated
5597 through the `Result` type. In order to assist with error handling, a
5598 `try!` macro for unwrapping errors with an early return and a lint for
5599 unused results has been added. See #12039 for more information.
5600 * std: The `vec` module has been renamed to `slice`.
5601 * std: A new vector type, `Vec<T>`, has been added in preparation for DST.
5602 This will become the only growable vector in the future.
5603 * std: `std::io` now has more public re-exports. Types such as `BufferedReader`
5604 are now found at `std::io::BufferedReader` instead of
5605 `std::io::buffered::BufferedReader`.
5606 * std: `print` and `println` are no longer in the prelude, the `print!` and
5607 `println!` macros are intended to be used instead.
5608 * std: `Rc` now has a `Weak` pointer for breaking cycles, and it no longer
5609 attempts to statically prevent cycles.
5610 * std: The standard distribution is adopting the policy of pushing failure
5611 to the user rather than failing in libraries. Many functions (such as
5612 `slice::last()`) now return `Option<T>` instead of `T` + failing.
5613 * std: `fmt::Default` has been renamed to `fmt::Show`, and it now has a new
5614 deriving mode: `#[deriving(Show)]`.
5615 * std: `ToStr` is now implemented for all types implementing `Show`.
5616 * std: The formatting trait methods now take `&self` instead of `&T`
5617 * std: The `invert()` method on iterators has been renamed to `rev()`
5618 * std: `std::num` has seen a reduction in the genericity of its traits,
5619 consolidating functionality into a few core traits.
5620 * std: Backtraces are now printed on task failure if the environment
5621 variable `RUST_BACKTRACE` is present.
5622 * std: Naming conventions for iterators have been standardized. More details
5623 can be found on the wiki's style guide.
5624 * std: `eof()` has been removed from the `Reader` trait. Specific types may
5625 still implement the function.
5626 * std: Networking types are now cloneable to allow simultaneous reads/writes.
5627 * std: `assert_approx_eq!` has been removed
5628 * std: The `e` and `E` formatting specifiers for floats have been added to
5629 print them in exponential notation.
5630 * std: The `Times` trait has been removed
5631 * std: Indications of variance and opting out of builtin bounds is done
5632 through marker types in `std::kinds::marker` now
5633 * std: `hash` has been rewritten, `IterBytes` has been removed, and
5634 `#[deriving(Hash)]` is now possible.
5635 * std: `SharedChan` has been removed, `Sender` is now cloneable.
5636 * std: `Chan` and `Port` were renamed to `Sender` and `Receiver`.
5637 * std: `Chan::new` is now `channel()`.
5638 * std: A new synchronous channel type has been implemented.
5639 * std: A `select!` macro is now provided for selecting over `Receiver`s.
5640 * std: `hashmap` and `trie` have been moved to `libcollections`
5641 * std: `run` has been rolled into `io::process`
5642 * std: `assert_eq!` now uses `{}` instead of `{:?}`
5643 * std: The equality and comparison traits have seen some reorganization.
5644 * std: `rand` has moved to `librand`.
5645 * std: `to_{lower,upper}case` has been implemented for `char`.
5646 * std: Logging has been moved to `liblog`.
5647 * collections: `HashMap` has been rewritten for higher performance and less
5649 * native: The default runtime is now `libnative`. If `libgreen` is desired,
5650 it can be booted manually. The runtime guide has more information and
5652 * native: All I/O functionality except signals has been implemented.
5653 * green: Task spawning with `libgreen` has been optimized with stack caching
5654 and various trimming of code.
5655 * green: Tasks spawned by `libgreen` now have an unmapped guard page.
5656 * sync: The `extra::sync` module has been updated to modern rust (and moved
5657 to the `sync` library), tweaking and improving various interfaces while
5658 dropping redundant functionality.
5659 * sync: A new `Barrier` type has been added to the `sync` library.
5660 * sync: An efficient mutex for native and green tasks has been implemented.
5661 * serialize: The `base64` module has seen some improvement. It treats
5662 newlines better, has non-string error values, and has seen general
5664 * fourcc: A `fourcc!` macro was introduced
5665 * hexfloat: A `hexfloat!` macro was implemented for specifying floats via a
5666 hexadecimal literal.
5669 * `rustpkg` has been deprecated and removed from the main repository. Its
5670 replacement, `cargo`, is under development.
5671 * Nightly builds of rust are now available
5672 * The memory usage of rustc has been improved many times throughout this
5674 * The build process supports disabling rpath support for the rustc binary
5676 * Code generation has improved in some cases, giving more information to the
5677 LLVM optimization passes to enable more extensive optimizations.
5678 * Debuginfo compatibility with lldb on OSX has been restored.
5679 * The master branch is now gated on an android bot, making building for
5680 android much more reliable.
5681 * Output flags have been centralized into one `--emit` flag.
5682 * Crate type flags have been centralized into one `--crate-type` flag.
5683 * Codegen flags have been consolidated behind a `-C` flag.
5684 * Linking against outdated crates now has improved error messages.
5685 * Error messages with lifetimes will often suggest how to annotate the
5686 function to fix the error.
5687 * Many more types are documented in the standard library, and new guides
5689 * Many `rustdoc` improvements:
5690 * code blocks are syntax highlighted.
5691 * render standalone markdown files.
5692 * the --test flag tests all code blocks by default.
5693 * exported macros are displayed.
5694 * re-exported types have their documentation inlined at the location of the
5696 * search works across crates that have been rendered to the same output
5700 Version 0.9 (2014-01-09)
5701 ==========================
5703 * ~1800 changes, numerous bugfixes
5706 * The `float` type has been removed. Use `f32` or `f64` instead.
5707 * A new facility for enabling experimental features (feature gating) has
5708 been added, using the crate-level `#[feature(foo)]` attribute.
5709 * Managed boxes (@) are now behind a feature gate
5710 (`#[feature(managed_boxes)]`) in preparation for future removal. Use the
5711 standard library's `Gc` or `Rc` types instead.
5712 * `@mut` has been removed. Use `std::cell::{Cell, RefCell}` instead.
5713 * Jumping back to the top of a loop is now done with `continue` instead of
5715 * Strings can no longer be mutated through index assignment.
5716 * Raw strings can be created via the basic `r"foo"` syntax or with matched
5717 hash delimiters, as in `r###"foo"###`.
5718 * `~fn` is now written `proc (args) -> retval { ... }` and may only be
5720 * The `&fn` type is now written `|args| -> ret` to match the literal form.
5721 * `@fn`s have been removed.
5722 * `do` only works with procs in order to make it obvious what the cost
5724 * Single-element tuple-like structs can no longer be dereferenced to
5725 obtain the inner value. A more comprehensive solution for overloading
5726 the dereference operator will be provided in the future.
5727 * The `#[link(...)]` attribute has been replaced with
5728 `#[crate_id = "name#vers"]`.
5729 * Empty `impl`s must be terminated with empty braces and may not be
5730 terminated with a semicolon.
5731 * Keywords are no longer allowed as lifetime names; the `self` lifetime
5732 no longer has any special meaning.
5733 * The old `fmt!` string formatting macro has been removed.
5734 * `printf!` and `printfln!` (old-style formatting) removed in favor of
5735 `print!` and `println!`.
5736 * `mut` works in patterns now, as in `let (mut x, y) = (1, 2);`.
5737 * The `extern mod foo (name = "bar")` syntax has been removed. Use
5738 `extern mod foo = "bar"` instead.
5739 * New reserved keywords: `alignof`, `offsetof`, `sizeof`.
5740 * Macros can have attributes.
5741 * Macros can expand to items with attributes.
5742 * Macros can expand to multiple items.
5743 * The `asm!` macro is feature-gated (`#[feature(asm)]`).
5744 * Comments may be nested.
5745 * Values automatically coerce to trait objects they implement, without
5747 * Enum discriminants are no longer an entire word but as small as needed to
5748 contain all the variants. The `repr` attribute can be used to override
5749 the discriminant size, as in `#[repr(int)]` for integer-sized, and
5750 `#[repr(C)]` to match C enums.
5751 * Non-string literals are not allowed in attributes (they never worked).
5752 * The FFI now supports variadic functions.
5753 * Octal numeric literals, as in `0o7777`.
5754 * The `concat!` syntax extension performs compile-time string concatenation.
5755 * The `#[fixed_stack_segment]` and `#[rust_stack]` attributes have been
5756 removed as Rust no longer uses segmented stacks.
5757 * Non-ascii identifiers are feature-gated (`#[feature(non_ascii_idents)]`).
5758 * Ignoring all fields of an enum variant or tuple-struct is done with `..`,
5759 not `*`; ignoring remaining fields of a struct is also done with `..`,
5760 not `_`; ignoring a slice of a vector is done with `..`, not `.._`.
5761 * `rustc` supports the "win64" calling convention via `extern "win64"`.
5762 * `rustc` supports the "system" calling convention, which defaults to the
5763 preferred convention for the target platform, "stdcall" on 32-bit Windows,
5765 * The `type_overflow` lint (default: warn) checks literals for overflow.
5766 * The `unsafe_block` lint (default: allow) checks for usage of `unsafe`.
5767 * The `attribute_usage` lint (default: warn) warns about unknown
5769 * The `unknown_features` lint (default: warn) warns about unknown
5771 * The `dead_code` lint (default: warn) checks for dead code.
5772 * Rust libraries can be linked statically to one another
5773 * `#[link_args]` is behind the `link_args` feature gate.
5774 * Native libraries are now linked with `#[link(name = "foo")]`
5775 * Native libraries can be statically linked to a rust crate
5776 (`#[link(name = "foo", kind = "static")]`).
5777 * Native OS X frameworks are now officially supported
5778 (`#[link(name = "foo", kind = "framework")]`).
5779 * The `#[thread_local]` attribute creates thread-local (not task-local)
5780 variables. Currently behind the `thread_local` feature gate.
5781 * The `return` keyword may be used in closures.
5782 * Types that can be copied via a memcpy implement the `Pod` kind.
5783 * The `cfg` attribute can now be used on struct fields and enum variants.
5786 * std: The `option` and `result` API's have been overhauled to make them
5787 simpler, more consistent, and more composable.
5788 * std: The entire `std::io` module has been replaced with one that is
5789 more comprehensive and that properly interfaces with the underlying
5790 scheduler. File, TCP, UDP, Unix sockets, pipes, and timers are all
5792 * std: `io::util` contains a number of useful implementations of
5793 `Reader` and `Writer`, including `NullReader`, `NullWriter`,
5794 `ZeroReader`, `TeeReader`.
5795 * std: The reference counted pointer type `extra::rc` moved into std.
5796 * std: The `Gc` type in the `gc` module will replace `@` (it is currently
5797 just a wrapper around it).
5798 * std: The `Either` type has been removed.
5799 * std: `fmt::Default` can be implemented for any type to provide default
5800 formatting to the `format!` macro, as in `format!("{}", myfoo)`.
5801 * std: The `rand` API continues to be tweaked.
5802 * std: The `rust_begin_unwind` function, useful for inserting breakpoints
5803 on failure in gdb, is now named `rust_fail`.
5804 * std: The `each_key` and `each_value` methods on `HashMap` have been
5805 replaced by the `keys` and `values` iterators.
5806 * std: Functions dealing with type size and alignment have moved from the
5807 `sys` module to the `mem` module.
5808 * std: The `path` module was written and API changed.
5809 * std: `str::from_utf8` has been changed to cast instead of allocate.
5810 * std: `starts_with` and `ends_with` methods added to vectors via the
5811 `ImmutableEqVector` trait, which is in the prelude.
5812 * std: Vectors can be indexed with the `get_opt` method, which returns `None`
5813 if the index is out of bounds.
5814 * std: Task failure no longer propagates between tasks, as the model was
5815 complex, expensive, and incompatible with thread-based tasks.
5816 * std: The `Any` type can be used for dynamic typing.
5817 * std: `~Any` can be passed to the `fail!` macro and retrieved via
5819 * std: Methods that produce iterators generally do not have an `_iter`
5821 * std: `cell::Cell` and `cell::RefCell` can be used to introduce mutability
5822 roots (mutable fields, etc.). Use instead of e.g. `@mut`.
5823 * std: `util::ignore` renamed to `prelude::drop`.
5824 * std: Slices have `sort` and `sort_by` methods via the `MutableVector`
5826 * std: `vec::raw` has seen a lot of cleanup and API changes.
5827 * std: The standard library no longer includes any C++ code, and very
5828 minimal C, eliminating the dependency on libstdc++.
5829 * std: Runtime scheduling and I/O functionality has been factored out into
5830 extensible interfaces and is now implemented by two different crates:
5831 libnative, for native threading and I/O; and libgreen, for green threading
5832 and I/O. This paves the way for using the standard library in more limited
5833 embedded environments.
5834 * std: The `comm` module has been rewritten to be much faster, have a
5835 simpler, more consistent API, and to work for both native and green
5837 * std: All libuv dependencies have been moved into the rustuv crate.
5838 * native: New implementations of runtime scheduling on top of OS threads.
5839 * native: New native implementations of TCP, UDP, file I/O, process spawning,
5841 * green: The green thread scheduler and message passing types are almost
5843 * extra: The `flatpipes` module had bitrotted and was removed.
5844 * extra: All crypto functions have been removed and Rust now has a policy of
5845 not reimplementing crypto in the standard library. In the future crypto
5846 will be provided by external crates with bindings to established libraries.
5847 * extra: `c_vec` has been modernized.
5848 * extra: The `sort` module has been removed. Use the `sort` method on
5852 * The `rust` and `rusti` commands have been removed, due to lack of
5854 * `rustdoc` was completely rewritten.
5855 * `rustdoc` can test code examples in documentation.
5856 * `rustpkg` can test packages with the argument, 'test'.
5857 * `rustpkg` supports arbitrary dependencies, including C libraries.
5858 * `rustc`'s support for generating debug info is improved again.
5859 * `rustc` has better error reporting for unbalanced delimiters.
5860 * `rustc`'s JIT support was removed due to bitrot.
5861 * Executables and static libraries can be built with LTO (-Z lto)
5862 * `rustc` adds a `--dep-info` flag for communicating dependencies to
5866 Version 0.8 (2013-09-26)
5867 ============================
5869 * ~2200 changes, numerous bugfixes
5872 * The `for` loop syntax has changed to work with the `Iterator` trait.
5873 * At long last, unwinding works on Windows.
5874 * Default methods are ready for use.
5875 * Many trait inheritance bugs fixed.
5876 * Owned and borrowed trait objects work more reliably.
5877 * `copy` is no longer a keyword. It has been replaced by the `Clone` trait.
5878 * rustc can omit emission of code for the `debug!` macro if it is passed
5880 * mod.rs is now "blessed". When loading `mod foo;`, rustc will now look
5881 for foo.rs, then foo/mod.rs, and will generate an error when both are
5883 * Strings no longer contain trailing nulls. The new `std::c_str` module
5884 provides new mechanisms for converting to C strings.
5885 * The type of foreign functions is now `extern "C" fn` instead of `*u8'.
5886 * The FFI has been overhauled such that foreign functions are called directly,
5887 instead of through a stack-switching wrapper.
5888 * Calling a foreign function must be done through a Rust function with the
5889 `#[fixed_stack_segment]` attribute.
5890 * The `externfn!` macro can be used to declare both a foreign function and
5891 a `#[fixed_stack_segment]` wrapper at once.
5892 * `pub` and `priv` modifiers on `extern` blocks are no longer parsed.
5893 * `unsafe` is no longer allowed on extern fns - they are all unsafe.
5894 * `priv` is disallowed everywhere except for struct fields and enum variants.
5895 * `&T` (besides `&'static T`) is no longer allowed in `@T`.
5896 * `ref` bindings in irrefutable patterns work correctly now.
5897 * `char` is now prevented from containing invalid code points.
5898 * Casting to `bool` is no longer allowed.
5899 * `\0` is now accepted as an escape in chars and strings.
5900 * `yield` is a reserved keyword.
5901 * `typeof` is a reserved keyword.
5902 * Crates may be imported by URL with `extern mod foo = "url";`.
5903 * Explicit enum discriminants may be given as uints as in `enum E { V = 0u }`
5904 * Static vectors can be initialized with repeating elements,
5905 e.g. `static foo: [u8, .. 100]: [0, .. 100];`.
5906 * Static structs can be initialized with functional record update,
5907 e.g. `static foo: Foo = Foo { a: 5, .. bar };`.
5908 * `cfg!` can be used to conditionally execute code based on the crate
5909 configuration, similarly to `#[cfg(...)]`.
5910 * The `unnecessary_qualification` lint detects unneeded module
5911 prefixes (default: allow).
5912 * Arithmetic operations have been implemented on the SIMD types in
5913 `std::unstable::simd`.
5914 * Exchange allocation headers were removed, reducing memory usage.
5915 * `format!` implements a completely new, extensible, and higher-performance
5916 string formatting system. It will replace `fmt!`.
5917 * `print!` and `println!` write formatted strings (using the `format!`
5918 extension) to stdout.
5919 * `write!` and `writeln!` write formatted strings (using the `format!`
5920 extension) to the new Writers in `std::rt::io`.
5921 * The library section in which a function or static is placed may
5922 be specified with `#[link_section = "..."]`.
5923 * The `proto!` syntax extension for defining bounded message protocols
5925 * `macro_rules!` is hygienic for `let` declarations.
5926 * The `#[export_name]` attribute specifies the name of a symbol.
5927 * `unreachable!` can be used to indicate unreachable code, and fails
5931 * std: Transitioned to the new runtime, written in Rust.
5932 * std: Added an experimental I/O library, `rt::io`, based on the new
5934 * std: A new generic `range` function was added to the prelude, replacing
5935 `uint::range` and friends.
5936 * std: `range_rev` no longer exists. Since range is an iterator it can be
5937 reversed with `range(lo, hi).invert()`.
5938 * std: The `chain` method on option renamed to `and_then`; `unwrap_or_default`
5939 renamed to `unwrap_or`.
5940 * std: The `iterator` module was renamed to `iter`.
5941 * std: Integral types now support the `checked_add`, `checked_sub`, and
5942 `checked_mul` operations for detecting overflow.
5943 * std: Many methods in `str`, `vec`, `option, `result` were renamed for
5945 * std: Methods are standardizing on conventions for casting methods:
5946 `to_foo` for copying, `into_foo` for moving, `as_foo` for temporary
5948 * std: The `CString` type in `c_str` provides new ways to convert to and
5950 * std: `DoubleEndedIterator` can yield elements in two directions.
5951 * std: The `mut_split` method on vectors partitions an `&mut [T]` into
5953 * std: `str::from_bytes` renamed to `str::from_utf8`.
5954 * std: `pop_opt` and `shift_opt` methods added to vectors.
5955 * std: The task-local data interface no longer uses @, and keys are
5956 no longer function pointers.
5957 * std: The `swap_unwrap` method of `Option` renamed to `take_unwrap`.
5958 * std: Added `SharedPort` to `comm`.
5959 * std: `Eq` has a default method for `ne`; only `eq` is required
5961 * std: `Ord` has default methods for `le`, `gt` and `ge`; only `lt`
5962 is required in implementations.
5963 * std: `is_utf8` performance is improved, impacting many string functions.
5964 * std: `os::MemoryMap` provides cross-platform mmap.
5965 * std: `ptr::offset` is now unsafe, but also more optimized. Offsets that
5966 are not 'in-bounds' are considered undefined.
5967 * std: Many freestanding functions in `vec` removed in favor of methods.
5968 * std: Many freestanding functions on scalar types removed in favor of
5970 * std: Many options to task builders were removed since they don't make
5971 sense in the new scheduler design.
5972 * std: More containers implement `FromIterator` so can be created by the
5974 * std: More complete atomic types in `unstable::atomics`.
5975 * std: `comm::PortSet` removed.
5976 * std: Mutating methods in the `Set` and `Map` traits have been moved into
5977 the `MutableSet` and `MutableMap` traits. `Container::is_empty`,
5978 `Map::contains_key`, `MutableMap::insert`, and `MutableMap::remove` have
5979 default implementations.
5980 * std: Various `from_str` functions were removed in favor of a generic
5981 `from_str` which is available in the prelude.
5982 * std: `util::unreachable` removed in favor of the `unreachable!` macro.
5983 * extra: `dlist`, the doubly-linked list was modernized.
5984 * extra: Added a `hex` module with `ToHex` and `FromHex` traits.
5985 * extra: Added `glob` module, replacing `std::os::glob`.
5986 * extra: `rope` was removed.
5987 * extra: `deque` was renamed to `ringbuf`. `RingBuf` implements `Deque`.
5988 * extra: `net`, and `timer` were removed. The experimental replacements
5989 are `std::rt::io::net` and `std::rt::io::timer`.
5990 * extra: Iterators implemented for `SmallIntMap`.
5991 * extra: Iterators implemented for `Bitv` and `BitvSet`.
5992 * extra: `SmallIntSet` removed. Use `BitvSet`.
5993 * extra: Performance of JSON parsing greatly improved.
5994 * extra: `semver` updated to SemVer 2.0.0.
5995 * extra: `term` handles more terminals correctly.
5996 * extra: `dbg` module removed.
5997 * extra: `par` module removed.
5998 * extra: `future` was cleaned up, with some method renames.
5999 * extra: Most free functions in `getopts` were converted to methods.
6002 * rustc's debug info generation (`-Z debug-info`) is greatly improved.
6003 * rustc accepts `--target-cpu` to compile to a specific CPU architecture,
6004 similarly to gcc's `--march` flag.
6005 * rustc's performance compiling small crates is much better.
6006 * rustpkg has received many improvements.
6007 * rustpkg supports git tags as package IDs.
6008 * rustpkg builds into target-specific directories so it can be used for
6010 * The number of concurrent test tasks is controlled by the environment
6011 variable RUST_TEST_TASKS.
6012 * The test harness can now report metrics for benchmarks.
6013 * All tools have man pages.
6014 * Programs compiled with `--test` now support the `-h` and `--help` flags.
6015 * The runtime uses jemalloc for allocations.
6016 * Segmented stacks are temporarily disabled as part of the transition to
6017 the new runtime. Stack overflows are possible!
6018 * A new documentation backend, rustdoc_ng, is available for use. It is
6019 still invoked through the normal `rustdoc` command.
6022 Version 0.7 (2013-07-03)
6023 =======================
6025 * ~2000 changes, numerous bugfixes
6028 * `impl`s no longer accept a visibility qualifier. Put them on methods
6030 * The borrow checker has been rewritten with flow-sensitivity, fixing
6031 many bugs and inconveniences.
6032 * The `self` parameter no longer implicitly means `&'self self`,
6033 and can be explicitly marked with a lifetime.
6034 * Overloadable compound operators (`+=`, etc.) have been temporarily
6035 removed due to bugs.
6036 * The `for` loop protocol now requires `for`-iterators to return `bool`
6037 so they compose better.
6038 * The `Durable` trait is replaced with the `'static` bounds.
6039 * Trait default methods work more often.
6040 * Structs with the `#[packed]` attribute have byte alignment and
6041 no padding between fields.
6042 * Type parameters bound by `Copy` must now be copied explicitly with
6044 * It is now illegal to move out of a dereferenced unsafe pointer.
6045 * `Option<~T>` is now represented as a nullable pointer.
6046 * `@mut` does dynamic borrow checks correctly.
6047 * The `main` function is only detected at the topmost level of the crate.
6048 The `#[main]` attribute is still valid anywhere.
6049 * Struct fields may no longer be mutable. Use inherited mutability.
6050 * The `#[no_send]` attribute makes a type that would otherwise be
6052 * The `#[no_freeze]` attribute makes a type that would otherwise be
6054 * Unbounded recursion will abort the process after reaching the limit
6055 specified by the `RUST_MAX_STACK` environment variable (default: 1GB).
6056 * The `vecs_implicitly_copyable` lint mode has been removed. Vectors
6057 are never implicitly copyable.
6058 * `#[static_assert]` makes compile-time assertions about static bools.
6059 * At long last, 'argument modes' no longer exist.
6060 * The rarely used `use mod` statement no longer exists.
6063 * `fail!` and `assert!` accept `~str`, `&'static str` or `fmt!`-style
6065 * `Encodable`, `Decodable`, `Ord`, `TotalOrd`, `TotalEq`, `DeepClone`,
6066 `Rand`, `Zero` and `ToStr` can all be automatically derived with
6068 * The `bytes!` macro returns a vector of bytes for string, u8, char,
6069 and unsuffixed integer literals.
6072 * The `core` crate was renamed to `std`.
6073 * The `std` crate was renamed to `extra`.
6074 * More and improved documentation.
6075 * std: `iterator` module for external iterator objects.
6076 * Many old-style (internal, higher-order function) iterators replaced by
6077 implementations of `Iterator`.
6078 * std: Many old internal vector and string iterators,
6079 incl. `any`, `all`. removed.
6080 * std: The `finalize` method of `Drop` renamed to `drop`.
6081 * std: The `drop` method now takes `&mut self` instead of `&self`.
6082 * std: The prelude no longer re-exports any modules, only types and traits.
6083 * std: Prelude additions: `print`, `println`, `FromStr`, `ApproxEq`, `Equiv`,
6084 `Iterator`, `IteratorUtil`, many numeric traits, many tuple traits.
6085 * std: New numeric traits: `Fractional`, `Real`, `RealExt`, `Integer`, `Ratio`,
6086 `Algebraic`, `Trigonometric`, `Exponential`, `Primitive`.
6087 * std: Tuple traits and accessors defined for up to 12-tuples, e.g.
6088 `(0, 1, 2).n2()` or `(0, 1, 2).n2_ref()`.
6089 * std: Many types implement `Clone`.
6090 * std: `path` type renamed to `Path`.
6091 * std: `mut` module and `Mut` type removed.
6092 * std: Many standalone functions removed in favor of methods and iterators
6093 in `vec`, `str`. In the future methods will also work as functions.
6094 * std: `reinterpret_cast` removed. Use `transmute`.
6095 * std: ascii string handling in `std::ascii`.
6096 * std: `Rand` is implemented for ~/@.
6097 * std: `run` module for spawning processes overhauled.
6098 * std: Various atomic types added to `unstable::atomic`.
6099 * std: Various types implement `Zero`.
6100 * std: `LinearMap` and `LinearSet` renamed to `HashMap` and `HashSet`.
6101 * std: Borrowed pointer functions moved from `ptr` to `borrow`.
6102 * std: Added `os::mkdir_recursive`.
6103 * std: Added `os::glob` function performs filesystems globs.
6104 * std: `FuzzyEq` renamed to `ApproxEq`.
6105 * std: `Map` now defines `pop` and `swap` methods.
6106 * std: `Cell` constructors converted to static methods.
6107 * extra: `rc` module adds the reference counted pointers, `Rc` and `RcMut`.
6108 * extra: `flate` module moved from `std` to `extra`.
6109 * extra: `fileinput` module for iterating over a series of files.
6110 * extra: `Complex` number type and `complex` module.
6111 * extra: `Rational` number type and `rational` module.
6112 * extra: `BigInt`, `BigUint` implement numeric and comparison traits.
6113 * extra: `term` uses terminfo now, is more correct.
6114 * extra: `arc` functions converted to methods.
6115 * extra: Implementation of fixed output size variations of SHA-2.
6118 * `unused_variable` lint mode for unused variables (default: warn).
6119 * `unused_unsafe` lint mode for detecting unnecessary `unsafe` blocks
6121 * `unused_mut` lint mode for identifying unused `mut` qualifiers
6123 * `dead_assignment` lint mode for unread variables (default: warn).
6124 * `unnecessary_allocation` lint mode detects some heap allocations that are
6125 immediately borrowed so could be written without allocating (default: warn).
6126 * `missing_doc` lint mode (default: allow).
6127 * `unreachable_code` lint mode (default: warn).
6128 * The `rusti` command has been rewritten and a number of bugs addressed.
6129 * rustc outputs in color on more terminals.
6130 * rustc accepts a `--link-args` flag to pass arguments to the linker.
6131 * rustc accepts a `-Z print-link-args` flag for debugging linkage.
6132 * Compiling with `-g` will make the binary record information about
6133 dynamic borrowcheck failures for debugging.
6134 * rustdoc has a nicer stylesheet.
6135 * Various improvements to rustdoc.
6136 * Improvements to rustpkg (see the detailed release notes).
6139 Version 0.6 (2013-04-03)
6140 ========================
6142 * ~2100 changes, numerous bugfixes
6145 * The self type parameter in traits is now spelled `Self`
6146 * The `self` parameter in trait and impl methods must now be explicitly
6147 named (for example: `fn f(&self) { }`). Implicit self is deprecated.
6148 * Static methods no longer require the `static` keyword and instead
6149 are distinguished by the lack of a `self` parameter
6150 * Replaced the `Durable` trait with the `'static` lifetime
6151 * The old closure type syntax with the trailing sigil has been
6152 removed in favor of the more consistent leading sigil
6153 * `super` is a keyword, and may be prefixed to paths
6154 * Trait bounds are separated with `+` instead of whitespace
6155 * Traits are implemented with `impl Trait for Type`
6156 instead of `impl Type: Trait`
6157 * Lifetime syntax is now `&'l foo` instead of `&l/foo`
6158 * The `export` keyword has finally been removed
6159 * The `move` keyword has been removed (see "Semantic changes")
6160 * The interior mutability qualifier on vectors, `[mut T]`, has been
6161 removed. Use `&mut [T]`, etc.
6162 * `mut` is no longer valid in `~mut T`. Use inherited mutability
6163 * `fail` is no longer a keyword. Use `fail!()`
6164 * `assert` is no longer a keyword. Use `assert!()`
6165 * `log` is no longer a keyword. use `debug!`, etc.
6166 * 1-tuples may be represented as `(T,)`
6167 * Struct fields may no longer be `mut`. Use inherited mutability,
6168 `@mut T`, `core::mut` or `core::cell`
6169 * `extern mod { ... }` is no longer valid syntax for foreign
6170 function modules. Use extern blocks: `extern { ... }`
6171 * Newtype enums removed. Use tuple-structs.
6172 * Trait implementations no longer support visibility modifiers
6173 * Pattern matching over vectors improved and expanded
6174 * `const` renamed to `static` to correspond to lifetime name,
6175 and make room for future `static mut` unsafe mutable globals.
6176 * Replaced `#[deriving_eq]` with `#[deriving(Eq)]`, etc.
6177 * `Clone` implementations can be automatically generated with
6178 `#[deriving(Clone)]`
6179 * Casts to traits must use a pointer sigil, e.g. `@foo as @Bar`
6180 instead of `foo as Bar`.
6181 * Fixed length vector types are now written as `[int, .. 3]`
6182 instead of `[int * 3]`.
6183 * Fixed length vector types can express the length as a constant
6184 expression. (ex: `[int, .. GL_BUFFER_SIZE - 2]`)
6187 * Types with owned pointers or custom destructors move by default,
6188 eliminating the `move` keyword
6189 * All foreign functions are considered unsafe
6190 * &mut is now unaliasable
6191 * Writes to borrowed @mut pointers are prevented dynamically
6193 * The name of the main function can be customized using #[main]
6194 * The default type of an inferred closure is &fn instead of @fn
6195 * `use` statements may no longer be "chained" - they cannot import
6196 identifiers imported by previous `use` statements
6197 * `use` statements are crate relative, importing from the "top"
6198 of the crate by default. Paths may be prefixed with `super::`
6199 or `self::` to change the search behavior.
6200 * Method visibility is inherited from the implementation declaration
6201 * Structural records have been removed
6202 * Many more types can be used in static items, including enums
6203 'static-lifetime pointers and vectors
6204 * Pattern matching over vectors improved and expanded
6205 * Typechecking of closure types has been overhauled to
6206 improve inference and eliminate unsoundness
6207 * Macros leave scope at the end of modules, unless that module is
6208 tagged with #[macro_escape]
6211 * Added big integers to `std::bigint`
6212 * Removed `core::oldcomm` module
6213 * Added pipe-based `core::comm` module
6214 * Numeric traits have been reorganized under `core::num`
6215 * `vec::slice` finally returns a slice
6216 * `debug!` and friends don't require a format string, e.g. `debug!(Foo)`
6217 * Containers reorganized around traits in `core::container`
6218 * `core::dvec` removed, `~[T]` is a drop-in replacement
6219 * `core::send_map` renamed to `core::hashmap`
6220 * `std::map` removed; replaced with `core::hashmap`
6221 * `std::treemap` reimplemented as an owned balanced tree
6222 * `std::deque` and `std::smallintmap` reimplemented as owned containers
6223 * `core::trie` added as a fast ordered map for integer keys
6224 * Set types added to `core::hashmap`, `core::trie` and `std::treemap`
6225 * `Ord` split into `Ord` and `TotalOrd`. `Ord` is still used to
6226 overload the comparison operators, whereas `TotalOrd` is used
6227 by certain container types
6230 * Replaced the 'cargo' package manager with 'rustpkg'
6231 * Added all-purpose 'rust' tool
6232 * `rustc --test` now supports benchmarks with the `#[bench]` attribute
6233 * rustc now *attempts* to offer spelling suggestions
6234 * Improved support for ARM and Android
6235 * Preliminary MIPS backend
6236 * Improved foreign function ABI implementation for x86, x86_64
6237 * Various memory usage improvements
6238 * Rust code may be embedded in foreign code under limited circumstances
6239 * Inline assembler supported by new asm!() syntax extension.
6242 Version 0.5 (2012-12-21)
6243 ===========================
6245 * ~900 changes, numerous bugfixes
6248 * Removed `<-` move operator
6249 * Completed the transition from the `#fmt` extension syntax to `fmt!`
6250 * Removed old fixed length vector syntax - `[T]/N`
6251 * New token-based quasi-quoters, `quote_tokens!`, `quote_expr!`, etc.
6252 * Macros may now expand to items and statements
6253 * `a.b()` is always parsed as a method call, never as a field projection
6254 * `Eq` and `IterBytes` implementations can be automatically generated
6255 with `#[deriving_eq]` and `#[deriving_iter_bytes]` respectively
6256 * Removed the special crate language for `.rc` files
6257 * Function arguments may consist of any irrefutable pattern
6260 * `&` and `~` pointers may point to objects
6261 * Tuple structs - `struct Foo(Bar, Baz)`. Will replace newtype enums.
6262 * Enum variants may be structs
6263 * Destructors can be added to all nominal types with the Drop trait
6264 * Structs and nullary enum variants may be constants
6265 * Values that cannot be implicitly copied are now automatically moved
6266 without writing `move` explicitly
6267 * `&T` may now be coerced to `*T`
6268 * Coercions happen in `let` statements as well as function calls
6269 * `use` statements now take crate-relative paths
6270 * The module and type namespaces have been merged so that static
6271 method names can be resolved under the trait in which they are
6274 * Improved support for language features
6275 * Trait inheritance works in many scenarios
6276 * More support for explicit self arguments in methods - `self`, `&self`
6277 `@self`, and `~self` all generally work as expected
6278 * Static methods work in more situations
6279 * Experimental: Traits may declare default methods for the implementations
6283 * New condition handling system in `core::condition`
6284 * Timsort added to `std::sort`
6285 * New priority queue, `std::priority_queue`
6286 * Pipes for serializable types, `std::flatpipes'
6287 * Serialization overhauled to be trait-based
6288 * Expanded `getopts` definitions
6289 * Moved futures to `std`
6290 * More functions are pure now
6291 * `core::comm` renamed to `oldcomm`. Still deprecated
6292 * `rustdoc` and `cargo` are libraries now
6295 * Added a preliminary REPL, `rusti`
6296 * License changed from MIT to dual MIT/APL2
6299 Version 0.4 (2012-10-15)
6300 ==========================
6302 * ~2000 changes, numerous bugfixes
6305 * All keywords are now strict and may not be used as identifiers anywhere
6306 * Keyword removal: 'again', 'import', 'check', 'new', 'owned', 'send',
6307 'of', 'with', 'to', 'class'.
6308 * Classes are replaced with simpler structs
6309 * Explicit method self types
6310 * `ret` became `return` and `alt` became `match`
6311 * `import` is now `use`; `use is now `extern mod`
6312 * `extern mod { ... }` is now `extern { ... }`
6313 * `use mod` is the recommended way to import modules
6314 * `pub` and `priv` replace deprecated export lists
6315 * The syntax of `match` pattern arms now uses fat arrow (=>)
6316 * `main` no longer accepts an args vector; use `os::args` instead
6319 * Trait implementations are now coherent, ala Haskell typeclasses
6320 * Trait methods may be static
6321 * Argument modes are deprecated
6322 * Borrowed pointers are much more mature and recommended for use
6323 * Strings and vectors in the static region are stored in constant memory
6324 * Typestate was removed
6325 * Resolution rewritten to be more reliable
6326 * Support for 'dual-mode' data structures (freezing and thawing)
6329 * Most binary operators can now be overloaded via the traits in
6331 * `std::net::url` for representing URLs
6332 * Sendable hash maps in `core::send_map`
6333 * `core::task' gained a (currently unsafe) task-local storage API
6336 * An efficient new intertask communication primitive called the pipe,
6337 along with a number of higher-level channel types, in `core::pipes`
6338 * `std::arc`, an atomically reference counted, immutable, shared memory
6340 * `std::sync`, various exotic synchronization tools based on arcs and pipes
6341 * Futures are now based on pipes and sendable
6342 * More robust linked task failure
6343 * Improved task builder API
6346 * Improved error reporting
6347 * Preliminary JIT support
6348 * Preliminary work on precise GC
6349 * Extensive architectural improvements to rustc
6350 * Begun a transition away from buggy C++-based reflection (shape) code to
6351 Rust-based (visitor) code
6352 * All hash functions and tables converted to secure, randomized SipHash
6355 Version 0.3 (2012-07-12)
6356 ========================
6358 * ~1900 changes, numerous bugfixes
6360 * New coding conveniences
6361 * Integer-literal suffix inference
6362 * Per-item control over warnings, errors
6363 * #[cfg(windows)] and #[cfg(unix)] attributes
6364 * Documentation comments
6365 * More compact closure syntax
6366 * 'do' expressions for treating higher-order functions as
6368 * *-patterns (wildcard extended to all constructor fields)
6371 * Name resolution pass and exhaustiveness checker rewritten
6372 * Region pointers and borrow checking supersede alias
6374 * Init-ness checking is now provided by a region-based liveness
6375 pass instead of the typestate pass; same for last-use analysis
6376 * Extensive work on region pointers
6378 * Experimental new language features
6379 * Slices and fixed-size, interior-allocated vectors
6380 * #!-comments for lang versioning, shell execution
6381 * Destructors and iface implementation for classes;
6382 type-parameterized classes and class methods
6383 * 'const' type kind for types that can be used to implement
6384 shared-memory concurrency patterns
6388 * Removal of various obsolete features
6389 * Keywords: 'be', 'prove', 'syntax', 'note', 'mutable', 'bind',
6390 'crust', 'native' (now 'extern'), 'cont' (now 'again')
6392 * Constructs: do-while loops ('do' repurposed), fn binding,
6393 resources (replaced by destructors)
6395 * Compiler reorganization
6396 * Syntax-layer of compiler split into separate crate
6397 * Clang (from LLVM project) integrated into build
6398 * Typechecker split into sub-modules
6401 * New time functions
6402 * Extension methods for many built-in types
6403 * Arc: atomic-refcount read-only / exclusive-use shared cells
6404 * Par: parallel map and search routines
6405 * Extensive work on libuv interface
6406 * Much vector code moved to libraries
6407 * Syntax extensions: #line, #col, #file, #mod, #stringify,
6408 #include, #include_str, #include_bin
6411 * Cargo automatically resolves dependencies
6414 Version 0.2 (2012-03-29)
6415 =========================
6417 * >1500 changes, numerous bugfixes
6419 * New docs and doc tooling
6421 * New port: FreeBSD x86_64
6423 * Compilation model enhancements
6424 * Generics now specialized, multiply instantiated
6425 * Functions now inlined across separate crates
6427 * Scheduling, stack and threading fixes
6428 * Noticeably improved message-passing performance
6429 * Explicit schedulers
6433 * Experimental new language features
6434 * Operator overloading
6438 * Various language extensions
6439 * C-callback function types: 'crust fn ...'
6440 * Infinite-loop construct: 'loop { ... }'
6441 * Shorten 'mutable' to 'mut'
6442 * Required mutable-local qualifier: 'let mut ...'
6443 * Basic glob-exporting: 'export foo::*;'
6444 * Alt now exhaustive, 'alt check' for runtime-checked
6445 * Block-function form of 'for' loop, with 'break' and 'ret'.
6448 * AST quasi-quote syntax extension
6449 * Revived libuv interface
6450 * New modules: core::{future, iter}, std::arena
6451 * Merged per-platform std::{os*, fs*} to core::{libc, os}
6452 * Extensive cleanup, regularization in libstd, libcore
6455 Version 0.1 (2012-01-20)
6456 ===============================
6458 * Most language features work, including:
6459 * Unique pointers, unique closures, move semantics
6460 * Interface-constrained generics
6461 * Static interface dispatch
6463 * Multithread task scheduling
6464 * Typestate predicates
6465 * Failure unwinding, destructors
6466 * Pattern matching and destructuring assignment
6467 * Lightweight block-lambda syntax
6468 * Preliminary macro-by-example
6470 * Compiler works with the following configurations:
6471 * Linux: x86 and x86_64 hosts and targets
6472 * macOS: x86 and x86_64 hosts and targets
6473 * Windows: x86 hosts and targets
6475 * Cross compilation / multi-target configuration supported.
6477 * Preliminary API-documentation and package-management tools included.
6481 * Documentation is incomplete.
6483 * Performance is below intended target.
6485 * Standard library APIs are subject to extensive change, reorganization.
6487 * Language-level versioning is not yet operational - future code will