1 Version 1.26.2 (2018-06-05)
2 ==========================
7 - [The borrow checker was fixed to avoid unsoundness when using match ergonomics][51117]
9 [51117]: https://github.com/rust-lang/rust/issues/51117
11 Version 1.26.1 (2018-05-29)
12 ==========================
17 - [RLS now works on Windows][50646]
18 - [Rustfmt stopped badly formatting text in some cases][rustfmt/2695]
23 - [`fn main() -> impl Trait` no longer works for non-Termination
25 This reverts an accidental stabilization.
26 - [`NaN > NaN` no longer returns true in const-fn contexts][50812]
27 - [Prohibit using turbofish for `impl Trait` in method arguments][50950]
29 [50646]: https://github.com/rust-lang/rust/issues/50646
30 [50656]: https://github.com/rust-lang/rust/pull/50656
31 [50812]: https://github.com/rust-lang/rust/pull/50812
32 [50950]: https://github.com/rust-lang/rust/issues/50950
33 [rustfmt/2695]: https://github.com/rust-lang-nursery/rustfmt/issues/2695
35 Version 1.26.0 (2018-05-10)
36 ==========================
40 - [Closures now implement `Copy` and/or `Clone` if all captured variables
41 implement either or both traits.][49299]
42 - [The inclusive range syntax e.g. `for x in 0..=10` is now stable.][47813]
43 - [Stablise `'_`. The underscore lifetime can be used anywhere where a
44 lifetime can be elided.][49458]
45 - [`impl Trait` is now stable allowing you to have abstract types in returns
46 or in function parameters.][49255] e.g. `fn foo() -> impl Iterator<Item=u8>` or
47 `fn open(path: impl AsRef<Path>)`.
48 - [Pattern matching will now automatically apply dereferences.][49394]
49 - [128-bit integers in the form of `u128` and `i128` are now stable.][49101]
50 - [`main` can now return `Result<(), E: Debug>`][49162] in addition to `()`.
51 - [A lot of operations are now available in a const context.][46882] E.g. You
52 can now index into constant arrays, reference and dereference into constants,
53 and use Tuple struct constructors.
54 - [Fixed entry slice patterns are now stable.][48516] e.g.
56 let points = [1, 2, 3, 4];
58 [1, 2, 3, 4] => println!("All points were sequential."),
59 _ => println!("Not all points were sequential."),
66 - [LLD is now used as the default linker for `wasm32-unknown-unknown`.][48125]
67 - [Fixed exponential projection complexity on nested types.][48296]
68 This can provide up to a ~12% reduction in compile times for certain crates.
69 - [Added the `--remap-path-prefix` option to rustc.][48359] Allowing you
70 to remap path prefixes outputted by the compiler.
71 - [Added `powerpc-unknown-netbsd` target.][48281]
75 - [Implemented `From<u16> for usize` & `From<{u8, i16}> for isize`.][49305]
76 - [Added hexadecimal formatting for integers with fmt::Debug][48978]
77 e.g. `assert!(format!("{:02x?}", b"Foo\0") == "[46, 6f, 6f, 00]")`
78 - [Implemented `Default, Hash` for `cmp::Reverse`.][48628]
79 - [Optimized `str::repeat` being 8x faster in large cases.][48657]
80 - [`ascii::escape_default` is now available in libcore.][48735]
81 - [Trailing commas are now supported in std and core macros.][48056]
82 - [Implemented `Copy, Clone` for `cmp::Reverse`][47379]
83 - [Implemented `Clone` for `char::{ToLowercase, ToUppercase}`.][48629]
88 - [`*const T::copy_to_nonoverlapping`]
89 - [`*const T::copy_to`]
90 - [`*const T::read_unaligned`]
91 - [`*const T::read_volatile`]
94 - [`*const T::wrapping_add`]
95 - [`*const T::wrapping_sub`]
97 - [`*mut T::copy_to_nonoverlapping`]
99 - [`*mut T::read_unaligned`]
100 - [`*mut T::read_volatile`]
102 - [`*mut T::replace`]
105 - [`*mut T::wrapping_add`]
106 - [`*mut T::wrapping_sub`]
107 - [`*mut T::write_bytes`]
108 - [`*mut T::write_unaligned`]
109 - [`*mut T::write_volatile`]
112 - [`FromUtf8Error::as_bytes`]
113 - [`LocalKey::try_with`]
115 - [`btree_map::Entry::and_modify`]
116 - [`fs::read_to_string`]
119 - [`hash_map::Entry::and_modify`]
120 - [`iter::FusedIterator`]
121 - [`ops::RangeInclusive`]
122 - [`ops::RangeToInclusive`]
124 - [`slice::rotate_left`]
125 - [`slice::rotate_right`]
131 - [Cargo will now output path to custom commands when `-v` is
132 passed with `--list`][cargo/5041]
133 - [The Cargo binary version is now the same as the Rust version][cargo/5083]
137 - [The second edition of "The Rust Programming Language" book is now recommended
138 over the first.][48404]
143 - [aliasing a `Fn` trait as `dyn` no longer works.][48481] E.g. the following
144 syntax is now invalid.
146 use std::ops::Fn as dyn;
147 fn g(_: Box<dyn(std::fmt::Debug)>) {}
149 - [The result of dereferences are no longer promoted to `'static`.][47408]
153 const PAIR: &(i32, i32) = &(0, 1);
154 let _reversed_pair: &'static _ = &(PAIR.1, PAIR.0); // Doesn't work
157 - [Deprecate `AsciiExt` trait in favor of inherent methods.][49109]
158 - [`".e0"` will now no longer parse as `0.0` and will instead cause
160 - [Removed hoedown from rustdoc.][48274]
161 - [Bounds on higher-kinded lifetimes a hard error.][48326]
163 [46882]: https://github.com/rust-lang/rust/pull/46882
164 [47379]: https://github.com/rust-lang/rust/pull/47379
165 [47408]: https://github.com/rust-lang/rust/pull/47408
166 [47813]: https://github.com/rust-lang/rust/pull/47813
167 [48056]: https://github.com/rust-lang/rust/pull/48056
168 [48125]: https://github.com/rust-lang/rust/pull/48125
169 [48166]: https://github.com/rust-lang/rust/pull/48166
170 [48235]: https://github.com/rust-lang/rust/pull/48235
171 [48274]: https://github.com/rust-lang/rust/pull/48274
172 [48281]: https://github.com/rust-lang/rust/pull/48281
173 [48296]: https://github.com/rust-lang/rust/pull/48296
174 [48326]: https://github.com/rust-lang/rust/pull/48326
175 [48359]: https://github.com/rust-lang/rust/pull/48359
176 [48404]: https://github.com/rust-lang/rust/pull/48404
177 [48481]: https://github.com/rust-lang/rust/pull/48481
178 [48516]: https://github.com/rust-lang/rust/pull/48516
179 [48628]: https://github.com/rust-lang/rust/pull/48628
180 [48629]: https://github.com/rust-lang/rust/pull/48629
181 [48657]: https://github.com/rust-lang/rust/pull/48657
182 [48735]: https://github.com/rust-lang/rust/pull/48735
183 [48978]: https://github.com/rust-lang/rust/pull/48978
184 [49101]: https://github.com/rust-lang/rust/pull/49101
185 [49109]: https://github.com/rust-lang/rust/pull/49109
186 [49121]: https://github.com/rust-lang/rust/pull/49121
187 [49162]: https://github.com/rust-lang/rust/pull/49162
188 [49184]: https://github.com/rust-lang/rust/pull/49184
189 [49234]: https://github.com/rust-lang/rust/pull/49234
190 [49255]: https://github.com/rust-lang/rust/pull/49255
191 [49299]: https://github.com/rust-lang/rust/pull/49299
192 [49305]: https://github.com/rust-lang/rust/pull/49305
193 [49394]: https://github.com/rust-lang/rust/pull/49394
194 [49458]: https://github.com/rust-lang/rust/pull/49458
195 [`*const T::add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.add
196 [`*const T::copy_to_nonoverlapping`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to_nonoverlapping
197 [`*const T::copy_to`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to
198 [`*const T::read_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_unaligned
199 [`*const T::read_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_volatile
200 [`*const T::read`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read
201 [`*const T::sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.sub
202 [`*const T::wrapping_add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_add
203 [`*const T::wrapping_sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_sub
204 [`*mut T::add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.add-1
205 [`*mut T::copy_to_nonoverlapping`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to_nonoverlapping-1
206 [`*mut T::copy_to`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to-1
207 [`*mut T::read_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_unaligned-1
208 [`*mut T::read_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_volatile-1
209 [`*mut T::read`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read-1
210 [`*mut T::replace`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.replace
211 [`*mut T::sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.sub-1
212 [`*mut T::swap`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.swap
213 [`*mut T::wrapping_add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_add-1
214 [`*mut T::wrapping_sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_sub-1
215 [`*mut T::write_bytes`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_bytes
216 [`*mut T::write_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_unaligned
217 [`*mut T::write_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_volatile
218 [`*mut T::write`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write
219 [`Box::leak`]: https://doc.rust-lang.org/std/boxed/struct.Box.html#method.leak
220 [`FromUtf8Error::as_bytes`]: https://doc.rust-lang.org/std/string/struct.FromUtf8Error.html#method.as_bytes
221 [`LocalKey::try_with`]: https://doc.rust-lang.org/std/thread/struct.LocalKey.html#method.try_with
222 [`Option::cloned`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.cloned
223 [`btree_map::Entry::and_modify`]: https://doc.rust-lang.org/std/collections/btree_map/enum.Entry.html#method.and_modify
224 [`fs::read_to_string`]: https://doc.rust-lang.org/std/fs/fn.read_to_string.html
225 [`fs::read`]: https://doc.rust-lang.org/std/fs/fn.read.html
226 [`fs::write`]: https://doc.rust-lang.org/std/fs/fn.write.html
227 [`hash_map::Entry::and_modify`]: https://doc.rust-lang.org/std/collections/hash_map/enum.Entry.html#method.and_modify
228 [`iter::FusedIterator`]: https://doc.rust-lang.org/std/iter/trait.FusedIterator.html
229 [`ops::RangeInclusive`]: https://doc.rust-lang.org/std/ops/struct.RangeInclusive.html
230 [`ops::RangeToInclusive`]: https://doc.rust-lang.org/std/ops/struct.RangeToInclusive.html
231 [`process::id`]: https://doc.rust-lang.org/std/process/fn.id.html
232 [`slice::rotate_left`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rotate_left
233 [`slice::rotate_right`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rotate_right
234 [`String::retain`]: https://doc.rust-lang.org/std/string/struct.String.html#method.retain
235 [cargo/5041]: https://github.com/rust-lang/cargo/pull/5041
236 [cargo/5083]: https://github.com/rust-lang/cargo/pull/5083
239 Version 1.25.0 (2018-03-29)
240 ==========================
244 - [Stabilised `#[repr(align(x))]`.][47006] [RFC 1358]
245 - [You can now use nested groups of imports.][47948]
246 e.g. `use std::{fs::File, io::Read, path::{Path, PathBuf}};`
247 - [You can now have `|` at the start of a match arm.][47947] e.g.
255 | Foo::B => println!("AB"),
256 | Foo::C => println!("C"),
263 - [Upgraded to LLVM 6.][47828]
264 - [Added `-C lto=val` option.][47521]
265 - [Added `i586-unknown-linux-musl` target][47282]
269 - [Impl Send for `process::Command` on Unix.][47760]
270 - [Impl PartialEq and Eq for `ParseCharError`.][47790]
271 - [`UnsafeCell::into_inner` is now safe.][47204]
272 - [Implement libstd for CloudABI.][47268]
273 - [`Float::{from_bits, to_bits}` is now available in libcore.][46931]
274 - [Implement `AsRef<Path>` for Component][46985]
275 - [Implemented `Write` for `Cursor<&mut Vec<u8>>`][46830]
276 - [Moved `Duration` to libcore.][46666]
280 - [`Location::column`]
283 The following functions can now be used in a constant expression.
284 eg. `static MINUTE: Duration = Duration::from_secs(60);`
285 - [`Duration::new`][47300]
286 - [`Duration::from_secs`][47300]
287 - [`Duration::from_millis`][47300]
291 - [`cargo new` no longer removes `rust` or `rs` prefixs/suffixs.][cargo/5013]
292 - [`cargo new` now defaults to creating a binary crate, instead of a
293 library crate.][cargo/5029]
297 - [Rust by example is now shipped with new releases][46196]
301 - [Deprecated `net::lookup_host`.][47510]
302 - [`rustdoc` has switched to pulldown as the default markdown renderer.][47398]
303 - The borrow checker was sometimes incorrectly permitting overlapping borrows
304 around indexing operations (see [#47349][47349]). This has been fixed (which also
305 enabled some correct code that used to cause errors (e.g. [#33903][33903] and [#46095][46095]).
306 - [Removed deprecated unstable attribute `#[simd]`.][47251]
308 [33903]: https://github.com/rust-lang/rust/pull/33903
309 [47947]: https://github.com/rust-lang/rust/pull/47947
310 [47948]: https://github.com/rust-lang/rust/pull/47948
311 [47760]: https://github.com/rust-lang/rust/pull/47760
312 [47790]: https://github.com/rust-lang/rust/pull/47790
313 [47828]: https://github.com/rust-lang/rust/pull/47828
314 [47398]: https://github.com/rust-lang/rust/pull/47398
315 [47510]: https://github.com/rust-lang/rust/pull/47510
316 [47521]: https://github.com/rust-lang/rust/pull/47521
317 [47204]: https://github.com/rust-lang/rust/pull/47204
318 [47251]: https://github.com/rust-lang/rust/pull/47251
319 [47268]: https://github.com/rust-lang/rust/pull/47268
320 [47282]: https://github.com/rust-lang/rust/pull/47282
321 [47300]: https://github.com/rust-lang/rust/pull/47300
322 [47349]: https://github.com/rust-lang/rust/pull/47349
323 [46931]: https://github.com/rust-lang/rust/pull/46931
324 [46985]: https://github.com/rust-lang/rust/pull/46985
325 [47006]: https://github.com/rust-lang/rust/pull/47006
326 [46830]: https://github.com/rust-lang/rust/pull/46830
327 [46095]: https://github.com/rust-lang/rust/pull/46095
328 [46666]: https://github.com/rust-lang/rust/pull/46666
329 [46196]: https://github.com/rust-lang/rust/pull/46196
330 [cargo/5013]: https://github.com/rust-lang/cargo/pull/5013
331 [cargo/5029]: https://github.com/rust-lang/cargo/pull/5029
332 [RFC 1358]: https://github.com/rust-lang/rfcs/pull/1358
333 [`Location::column`]: https://doc.rust-lang.org/std/panic/struct.Location.html#method.column
334 [`ptr::NonNull`]: https://doc.rust-lang.org/std/ptr/struct.NonNull.html
337 Version 1.24.1 (2018-03-01)
338 ==========================
340 - [Do not abort when unwinding through FFI][48251]
341 - [Emit UTF-16 files for linker arguments on Windows][48318]
342 - [Make the error index generator work again][48308]
343 - [Cargo will warn on Windows 7 if an update is needed][cargo/5069].
345 [48251]: https://github.com/rust-lang/rust/issues/48251
346 [48308]: https://github.com/rust-lang/rust/issues/48308
347 [48318]: https://github.com/rust-lang/rust/issues/48318
348 [cargo/5069]: https://github.com/rust-lang/cargo/pull/5069
351 Version 1.24.0 (2018-02-15)
352 ==========================
356 - [External `sysv64` ffi is now available.][46528]
357 eg. `extern "sysv64" fn foo () {}`
361 - [rustc now uses 16 codegen units by default for release builds.][46910]
362 For the fastest builds, utilize `codegen-units=1`.
363 - [Added `armv4t-unknown-linux-gnueabi` target.][47018]
364 - [Add `aarch64-unknown-openbsd` support][46760]
368 - [`str::find::<char>` now uses memchr.][46735] This should lead to a 10x
369 improvement in performance in the majority of cases.
370 - [`OsStr`'s `Debug` implementation is now lossless and consistent
371 with Windows.][46798]
372 - [`time::{SystemTime, Instant}` now implement `Hash`.][46828]
373 - [impl `From<bool>` for `AtomicBool`][46293]
374 - [impl `From<{CString, &CStr}>` for `{Arc<CStr>, Rc<CStr>}`][45990]
375 - [impl `From<{OsString, &OsStr}>` for `{Arc<OsStr>, Rc<OsStr>}`][45990]
376 - [impl `From<{PathBuf, &Path}>` for `{Arc<Path>, Rc<Path>}`][45990]
377 - [float::from_bits now just uses transmute.][46012] This provides
378 some optimisations from LLVM.
379 - [Copied `AsciiExt` methods onto `char`][46077]
380 - [Remove `T: Sized` requirement on `ptr::is_null()`][46094]
381 - [impl `From<RecvError>` for `{TryRecvError, RecvTimeoutError}`][45506]
382 - [Optimised `f32::{min, max}` to generate more efficient x86 assembly][47080]
383 - [`[u8]::contains` now uses memchr which provides a 3x speed improvement][46713]
387 - [`RefCell::replace`]
389 - [`atomic::spin_loop_hint`]
391 The following functions can now be used in a constant expression.
392 eg. `let buffer: [u8; size_of::<usize>()];`, `static COUNTER: AtomicUsize = AtomicUsize::new(1);`
394 - [`AtomicBool::new`][46287]
395 - [`AtomicUsize::new`][46287]
396 - [`AtomicIsize::new`][46287]
397 - [`AtomicPtr::new`][46287]
398 - [`Cell::new`][46287]
399 - [`{integer}::min_value`][46287]
400 - [`{integer}::max_value`][46287]
401 - [`mem::size_of`][46287]
402 - [`mem::align_of`][46287]
403 - [`ptr::null`][46287]
404 - [`ptr::null_mut`][46287]
405 - [`RefCell::new`][46287]
406 - [`UnsafeCell::new`][46287]
410 - [Added a `workspace.default-members` config that
411 overrides implied `--all` in virtual workspaces.][cargo/4743]
412 - [Enable incremental by default on development builds.][cargo/4817] Also added
413 configuration keys to `Cargo.toml` and `.cargo/config` to disable on a
414 per-project or global basis respectively.
421 - [Floating point types `Debug` impl now always prints a decimal point.][46831]
422 - [`Ipv6Addr` now rejects superfluous `::`'s in IPv6 addresses][46671] This is
423 in accordance with IETF RFC 4291 §2.2.
424 - [Unwinding will no longer go past FFI boundaries, and will instead abort.][46833]
425 - [`Formatter::flags` method is now deprecated.][46284] The `sign_plus`,
426 `sign_minus`, `alternate`, and `sign_aware_zero_pad` should be used instead.
427 - [Leading zeros in tuple struct members is now an error][47084]
428 - [`column!()` macro is one-based instead of zero-based][46977]
429 - [`fmt::Arguments` can no longer be shared across threads][45198]
430 - [Access to `#[repr(packed)]` struct fields is now unsafe][44884]
431 - [Cargo sets a different working directory for the compiler][cargo/4788]
433 [44884]: https://github.com/rust-lang/rust/pull/44884
434 [45198]: https://github.com/rust-lang/rust/pull/45198
435 [45506]: https://github.com/rust-lang/rust/pull/45506
436 [45904]: https://github.com/rust-lang/rust/pull/45904
437 [45990]: https://github.com/rust-lang/rust/pull/45990
438 [46012]: https://github.com/rust-lang/rust/pull/46012
439 [46077]: https://github.com/rust-lang/rust/pull/46077
440 [46094]: https://github.com/rust-lang/rust/pull/46094
441 [46284]: https://github.com/rust-lang/rust/pull/46284
442 [46287]: https://github.com/rust-lang/rust/pull/46287
443 [46293]: https://github.com/rust-lang/rust/pull/46293
444 [46528]: https://github.com/rust-lang/rust/pull/46528
445 [46671]: https://github.com/rust-lang/rust/pull/46671
446 [46713]: https://github.com/rust-lang/rust/pull/46713
447 [46735]: https://github.com/rust-lang/rust/pull/46735
448 [46749]: https://github.com/rust-lang/rust/pull/46749
449 [46760]: https://github.com/rust-lang/rust/pull/46760
450 [46798]: https://github.com/rust-lang/rust/pull/46798
451 [46828]: https://github.com/rust-lang/rust/pull/46828
452 [46831]: https://github.com/rust-lang/rust/pull/46831
453 [46833]: https://github.com/rust-lang/rust/pull/46833
454 [46910]: https://github.com/rust-lang/rust/pull/46910
455 [46977]: https://github.com/rust-lang/rust/pull/46977
456 [47018]: https://github.com/rust-lang/rust/pull/47018
457 [47080]: https://github.com/rust-lang/rust/pull/47080
458 [47084]: https://github.com/rust-lang/rust/pull/47084
459 [cargo/4743]: https://github.com/rust-lang/cargo/pull/4743
460 [cargo/4788]: https://github.com/rust-lang/cargo/pull/4788
461 [cargo/4817]: https://github.com/rust-lang/cargo/pull/4817
462 [`RefCell::replace`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.replace
463 [`RefCell::swap`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.swap
464 [`atomic::spin_loop_hint`]: https://doc.rust-lang.org/std/sync/atomic/fn.spin_loop_hint.html
467 Version 1.23.0 (2018-01-04)
468 ==========================
472 - [Arbitrary `auto` traits are now permitted in trait objects.][45772]
473 - [rustc now uses subtyping on the left hand side of binary operations.][45435]
474 Which should fix some confusing errors in some operations.
478 - [Enabled `TrapUnreachable` in LLVM which should mitigate the impact of
479 undefined behaviour.][45920]
480 - [rustc now suggests renaming import if names clash.][45660]
481 - [Display errors/warnings correctly when there are zero-width or
482 wide characters.][45711]
483 - [rustc now avoids unnecessary copies of arguments that are
484 simple bindings][45380] This should improve memory usage on average by 5-10%.
485 - [Updated musl used to build musl rustc to 1.1.17][45393]
489 - [Allow a trailing comma in `assert_eq/ne` macro][45887]
490 - [Implement Hash for raw pointers to unsized types][45483]
491 - [impl `From<*mut T>` for `AtomicPtr<T>`][45610]
492 - [impl `From<usize/isize>` for `AtomicUsize/AtomicIsize`.][45610]
493 - [Removed the `T: Sync` requirement for `RwLock<T>: Send`][45267]
494 - [Removed `T: Sized` requirement for `{<*const T>, <*mut T>}::as_ref`
495 and `<*mut T>::as_mut`][44932]
496 - [Optimized `Thread::{park, unpark}` implementation][45524]
497 - [Improved `SliceExt::binary_search` performance.][45333]
498 - [impl `FromIterator<()>` for `()`][45379]
499 - [Copied `AsciiExt` trait methods to primitive types.][44042] Use of `AsciiExt`
507 - [Cargo now supports uninstallation of multiple packages][cargo/4561]
508 eg. `cargo uninstall foo bar` uninstalls `foo` and `bar`.
509 - [Added unit test checking to `cargo check`][cargo/4592]
510 - [Cargo now lets you install a specific version
511 using `cargo install --version`][cargo/4637]
515 - [Releases now ship with the Cargo book documentation.][45692]
516 - [rustdoc now prints rendering warnings on every run.][45324]
520 - [Changes have been made to type equality to make it more correct,
521 in rare cases this could break some code.][45853] [Tracking issue for
522 further information][45852]
523 - [`char::escape_debug` now uses Unicode 10 over 9.][45571]
524 - [Upgraded Android SDK to 27, and NDK to r15c.][45580] This drops support for
525 Android 9, the minimum supported version is Android 14.
526 - [Bumped the minimum LLVM to 3.9][45326]
528 [44042]: https://github.com/rust-lang/rust/pull/44042
529 [44932]: https://github.com/rust-lang/rust/pull/44932
530 [45267]: https://github.com/rust-lang/rust/pull/45267
531 [45324]: https://github.com/rust-lang/rust/pull/45324
532 [45326]: https://github.com/rust-lang/rust/pull/45326
533 [45333]: https://github.com/rust-lang/rust/pull/45333
534 [45379]: https://github.com/rust-lang/rust/pull/45379
535 [45380]: https://github.com/rust-lang/rust/pull/45380
536 [45393]: https://github.com/rust-lang/rust/pull/45393
537 [45435]: https://github.com/rust-lang/rust/pull/45435
538 [45483]: https://github.com/rust-lang/rust/pull/45483
539 [45524]: https://github.com/rust-lang/rust/pull/45524
540 [45571]: https://github.com/rust-lang/rust/pull/45571
541 [45580]: https://github.com/rust-lang/rust/pull/45580
542 [45610]: https://github.com/rust-lang/rust/pull/45610
543 [45660]: https://github.com/rust-lang/rust/pull/45660
544 [45692]: https://github.com/rust-lang/rust/pull/45692
545 [45711]: https://github.com/rust-lang/rust/pull/45711
546 [45772]: https://github.com/rust-lang/rust/pull/45772
547 [45852]: https://github.com/rust-lang/rust/issues/45852
548 [45853]: https://github.com/rust-lang/rust/pull/45853
549 [45887]: https://github.com/rust-lang/rust/pull/45887
550 [45920]: https://github.com/rust-lang/rust/pull/45920
551 [cargo/4561]: https://github.com/rust-lang/cargo/pull/4561
552 [cargo/4592]: https://github.com/rust-lang/cargo/pull/4592
553 [cargo/4637]: https://github.com/rust-lang/cargo/pull/4637
556 Version 1.22.1 (2017-11-22)
557 ==========================
559 - [Update Cargo to fix an issue with macOS 10.13 "High Sierra"][46183]
561 [46183]: https://github.com/rust-lang/rust/pull/46183
563 Version 1.22.0 (2017-11-22)
564 ==========================
568 - [`non_snake_case` lint now allows extern no-mangle functions][44966]
569 - [Now accepts underscores in unicode escapes][43716]
570 - [`T op= &T` now works for numeric types.][44287] eg. `let mut x = 2; x += &8;`
571 - [types that impl `Drop` are now allowed in `const` and `static` types][44456]
575 - [rustc now defaults to having 16 codegen units at debug on supported platforms.][45064]
576 - [rustc will no longer inline in codegen units when compiling for debug][45075]
577 This should decrease compile times for debug builds.
578 - [strict memory alignment now enabled on ARMv6][45094]
579 - [Remove support for the PNaCl target `le32-unknown-nacl`][45041]
583 - [Allow atomic operations up to 32 bits
584 on `armv5te_unknown_linux_gnueabi`][44978]
585 - [`Box<Error>` now impls `From<Cow<str>>`][44466]
586 - [`std::mem::Discriminant` is now guaranteed to be `Send + Sync`][45095]
587 - [`fs::copy` now returns the length of the main stream on NTFS.][44895]
588 - [Properly detect overflow in `Instant += Duration`.][44220]
589 - [impl `Hasher` for `{&mut Hasher, Box<Hasher>}`][44015]
590 - [impl `fmt::Debug` for `SplitWhitespace`.][44303]
591 - [`Option<T>` now impls `Try`][42526] This allows for using `?` with `Option` types.
598 - [Cargo will now build multi file examples in subdirectories of the `examples`
599 folder that have a `main.rs` file.][cargo/4496]
600 - [Changed `[root]` to `[package]` in `Cargo.lock`][cargo/4571] Packages with
601 the old format will continue to work and can be updated with `cargo update`.
602 - [Now supports vendoring git repositories][cargo/3992]
606 - [`libbacktrace` is now available on Apple platforms.][44251]
607 - [Stabilised the `compile_fail` attribute for code fences in doc-comments.][43949]
608 This now lets you specify that a given code example will fail to compile.
612 - [The minimum Android version that rustc can build for has been bumped
613 to `4.0` from `2.3`][45656]
614 - [Allowing `T op= &T` for numeric types has broken some type
615 inference cases][45480]
618 [42526]: https://github.com/rust-lang/rust/pull/42526
619 [43017]: https://github.com/rust-lang/rust/pull/43017
620 [43716]: https://github.com/rust-lang/rust/pull/43716
621 [43949]: https://github.com/rust-lang/rust/pull/43949
622 [44015]: https://github.com/rust-lang/rust/pull/44015
623 [44220]: https://github.com/rust-lang/rust/pull/44220
624 [44251]: https://github.com/rust-lang/rust/pull/44251
625 [44287]: https://github.com/rust-lang/rust/pull/44287
626 [44303]: https://github.com/rust-lang/rust/pull/44303
627 [44456]: https://github.com/rust-lang/rust/pull/44456
628 [44466]: https://github.com/rust-lang/rust/pull/44466
629 [44895]: https://github.com/rust-lang/rust/pull/44895
630 [44966]: https://github.com/rust-lang/rust/pull/44966
631 [44978]: https://github.com/rust-lang/rust/pull/44978
632 [45041]: https://github.com/rust-lang/rust/pull/45041
633 [45064]: https://github.com/rust-lang/rust/pull/45064
634 [45075]: https://github.com/rust-lang/rust/pull/45075
635 [45094]: https://github.com/rust-lang/rust/pull/45094
636 [45095]: https://github.com/rust-lang/rust/pull/45095
637 [45480]: https://github.com/rust-lang/rust/issues/45480
638 [45656]: https://github.com/rust-lang/rust/pull/45656
639 [cargo/3992]: https://github.com/rust-lang/cargo/pull/3992
640 [cargo/4496]: https://github.com/rust-lang/cargo/pull/4496
641 [cargo/4571]: https://github.com/rust-lang/cargo/pull/4571
648 Version 1.21.0 (2017-10-12)
649 ==========================
653 - [You can now use static references for literals.][43838]
657 let x: &'static u32 = &0;
660 - [Relaxed path syntax. Optional `::` before `<` is now allowed in all contexts.][43540]
663 my_macro!(Vec<i32>::new); // Always worked
664 my_macro!(Vec::<i32>::new); // Now works
669 - [Upgraded jemalloc to 4.5.0][43911]
670 - [Enabled unwinding panics on Redox][43917]
671 - [Now runs LLVM in parallel during translation phase.][43506]
672 This should reduce peak memory usage.
676 - [Generate builtin impls for `Clone` for all arrays and tuples that
677 are `T: Clone`][43690]
678 - [`Stdin`, `Stdout`, and `Stderr` now implement `AsRawFd`.][43459]
679 - [`Rc` and `Arc` now implement `From<&[T]> where T: Clone`, `From<str>`,
680 `From<String>`, `From<Box<T>> where T: ?Sized`, and `From<Vec<T>>`.][42565]
685 [`std::mem::discriminant`]
689 - [You can now call `cargo install` with multiple package names][cargo/4216]
690 - [Cargo commands inside a virtual workspace will now implicitly
691 pass `--all`][cargo/4335]
692 - [Added a `[patch]` section to `Cargo.toml` to handle
693 prepublication dependencies][cargo/4123] [RFC 1969]
694 - [`include` & `exclude` fields in `Cargo.toml` now accept gitignore
695 like patterns][cargo/4270]
696 - [Added the `--all-targets` option][cargo/4400]
697 - [Using required dependencies as a feature is now deprecated and emits
698 a warning][cargo/4364]
703 - [Cargo docs are moving][43916]
704 to [doc.rust-lang.org/cargo](https://doc.rust-lang.org/cargo)
705 - [The rustdoc book is now available][43863]
706 at [doc.rust-lang.org/rustdoc](https://doc.rust-lang.org/rustdoc)
707 - [Added a preview of RLS has been made available through rustup][44204]
708 Install with `rustup component add rls-preview`
709 - [`std::os` documentation for Unix, Linux, and Windows now appears on doc.rust-lang.org][43348]
710 Previously only showed `std::os::unix`.
714 - [Changes in method matching against higher-ranked types][43880] This may cause
715 breakage in subtyping corner cases. [A more in-depth explanation is available.][info/43880]
716 - [rustc's JSON error output's byte position start at top of file.][42973]
717 Was previously relative to the rustc's internal `CodeMap` struct which
718 required the unstable library `libsyntax` to correctly use.
719 - [`unused_results` lint no longer ignores booleans][43728]
721 [42565]: https://github.com/rust-lang/rust/pull/42565
722 [42973]: https://github.com/rust-lang/rust/pull/42973
723 [43348]: https://github.com/rust-lang/rust/pull/43348
724 [43459]: https://github.com/rust-lang/rust/pull/43459
725 [43506]: https://github.com/rust-lang/rust/pull/43506
726 [43540]: https://github.com/rust-lang/rust/pull/43540
727 [43690]: https://github.com/rust-lang/rust/pull/43690
728 [43728]: https://github.com/rust-lang/rust/pull/43728
729 [43838]: https://github.com/rust-lang/rust/pull/43838
730 [43863]: https://github.com/rust-lang/rust/pull/43863
731 [43880]: https://github.com/rust-lang/rust/pull/43880
732 [43911]: https://github.com/rust-lang/rust/pull/43911
733 [43916]: https://github.com/rust-lang/rust/pull/43916
734 [43917]: https://github.com/rust-lang/rust/pull/43917
735 [44204]: https://github.com/rust-lang/rust/pull/44204
736 [cargo/4123]: https://github.com/rust-lang/cargo/pull/4123
737 [cargo/4216]: https://github.com/rust-lang/cargo/pull/4216
738 [cargo/4270]: https://github.com/rust-lang/cargo/pull/4270
739 [cargo/4335]: https://github.com/rust-lang/cargo/pull/4335
740 [cargo/4364]: https://github.com/rust-lang/cargo/pull/4364
741 [cargo/4400]: https://github.com/rust-lang/cargo/pull/4400
742 [RFC 1969]: https://github.com/rust-lang/rfcs/pull/1969
743 [info/43880]: https://github.com/rust-lang/rust/issues/44224#issuecomment-330058902
744 [`std::mem::discriminant`]: https://doc.rust-lang.org/std/mem/fn.discriminant.html
746 Version 1.20.0 (2017-08-31)
747 ===========================
751 - [Associated constants are now stabilised.][42809]
752 - [A lot of macro bugs are now fixed.][42913]
757 - [Struct fields are now properly coerced to the expected field type.][42807]
758 - [Enabled wasm LLVM backend][42571] WASM can now be built with the
759 `wasm32-experimental-emscripten` target.
760 - [Changed some of the error messages to be more helpful.][42033]
761 - [Add support for RELRO(RELocation Read-Only) for platforms that support
763 - [rustc now reports the total number of errors on compilation failure][43015]
764 previously this was only the number of errors in the pass that failed.
765 - [Expansion in rustc has been sped up 29x.][42533]
766 - [added `msp430-none-elf` target.][43099]
767 - [rustc will now suggest one-argument enum variant to fix type mismatch when
769 - [Fixes backtraces on Redox][43228]
770 - [rustc now identifies different versions of same crate when absolute paths of
771 different types match in an error message.][42826]
777 - [Relaxed Debug constraints on `{HashMap,BTreeMap}::{Keys,Values}`.][42854]
778 - [Impl `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Debug`, `Hash` for unsized
780 - [Impl `fmt::{Display, Debug}` for `Ref`, `RefMut`, `MutexGuard`,
781 `RwLockReadGuard`, `RwLockWriteGuard`][42822]
782 - [Impl `Clone` for `DefaultHasher`.][42799]
783 - [Impl `Sync` for `SyncSender`.][42397]
784 - [Impl `FromStr` for `char`][42271]
785 - [Fixed how `{f32, f64}::{is_sign_negative, is_sign_positive}` handles
787 - [allow messages in the `unimplemented!()` macro.][42155]
788 ie. `unimplemented!("Waiting for 1.21 to be stable")`
789 - [`pub(restricted)` is now supported in the `thread_local!` macro.][43185]
790 - [Upgrade to Unicode 10.0.0][42999]
791 - [Reimplemented `{f32, f64}::{min, max}` in Rust instead of using CMath.][42430]
792 - [Skip the main thread's manual stack guard on Linux][43072]
793 - [Iterator::nth for `ops::{Range, RangeFrom}` is now done in O(1) time][43077]
794 - [`#[repr(align(N))]` attribute max number is now 2^31 - 1.][43097] This was
796 - [`{OsStr, Path}::Display` now avoids allocations where possible][42613]
801 - [`CStr::into_c_string`]
802 - [`CString::as_c_str`]
803 - [`CString::into_boxed_c_str`]
806 - [`Chain::into_inner`]
807 - [`Option::get_or_insert_with`]
808 - [`Option::get_or_insert`]
809 - [`OsStr::into_os_string`]
810 - [`OsString::into_boxed_os_str`]
813 - [`Utf8Error::error_len`]
814 - [`char::EscapeDebug`]
815 - [`char::escape_debug`]
821 - [`mem::ManuallyDrop`]
822 - [`slice::sort_unstable_by_key`]
823 - [`slice::sort_unstable_by`]
824 - [`slice::sort_unstable`]
825 - [`str::from_boxed_utf8_unchecked`]
826 - [`str::as_bytes_mut`]
827 - [`str::as_bytes_mut`]
828 - [`str::from_utf8_mut`]
829 - [`str::from_utf8_unchecked_mut`]
831 - [`str::get_unchecked_mut`]
832 - [`str::get_unchecked`]
834 - [`str::into_boxed_bytes`]
839 - [Cargo API token location moved from `~/.cargo/config` to
840 `~/.cargo/credentials`.][cargo/3978]
841 - [Cargo will now build `main.rs` binaries that are in sub-directories of
842 `src/bin`.][cargo/4214] ie. Having `src/bin/server/main.rs` and
843 `src/bin/client/main.rs` generates `target/debug/server` and `target/debug/client`
844 - [You can now specify version of a binary when installed through
845 `cargo install` using `--vers`.][cargo/4229]
846 - [Added `--no-fail-fast` flag to cargo to run all benchmarks regardless of
847 failure.][cargo/4248]
848 - [Changed the convention around which file is the crate root.][cargo/4259]
849 - [The `include`/`exclude` property in `Cargo.toml` now accepts gitignore paths
850 instead of glob patterns][cargo/4270]. Glob patterns are now deprecated.
855 - [Functions with `'static` in their return types will now not be as usable as
856 if they were using lifetime parameters instead.][42417]
857 - [The reimplementation of `{f32, f64}::is_sign_{negative, positive}` now
858 takes the sign of NaN into account where previously didn't.][42430]
860 [42033]: https://github.com/rust-lang/rust/pull/42033
861 [42155]: https://github.com/rust-lang/rust/pull/42155
862 [42271]: https://github.com/rust-lang/rust/pull/42271
863 [42397]: https://github.com/rust-lang/rust/pull/42397
864 [42417]: https://github.com/rust-lang/rust/pull/42417
865 [42430]: https://github.com/rust-lang/rust/pull/42430
866 [42431]: https://github.com/rust-lang/rust/pull/42431
867 [42533]: https://github.com/rust-lang/rust/pull/42533
868 [42571]: https://github.com/rust-lang/rust/pull/42571
869 [42613]: https://github.com/rust-lang/rust/pull/42613
870 [42799]: https://github.com/rust-lang/rust/pull/42799
871 [42807]: https://github.com/rust-lang/rust/pull/42807
872 [42809]: https://github.com/rust-lang/rust/pull/42809
873 [42822]: https://github.com/rust-lang/rust/pull/42822
874 [42826]: https://github.com/rust-lang/rust/pull/42826
875 [42854]: https://github.com/rust-lang/rust/pull/42854
876 [42913]: https://github.com/rust-lang/rust/pull/42913
877 [42999]: https://github.com/rust-lang/rust/pull/42999
878 [43011]: https://github.com/rust-lang/rust/pull/43011
879 [43015]: https://github.com/rust-lang/rust/pull/43015
880 [43072]: https://github.com/rust-lang/rust/pull/43072
881 [43077]: https://github.com/rust-lang/rust/pull/43077
882 [43097]: https://github.com/rust-lang/rust/pull/43097
883 [43099]: https://github.com/rust-lang/rust/pull/43099
884 [43170]: https://github.com/rust-lang/rust/pull/43170
885 [43178]: https://github.com/rust-lang/rust/pull/43178
886 [43185]: https://github.com/rust-lang/rust/pull/43185
887 [43228]: https://github.com/rust-lang/rust/pull/43228
888 [cargo/3978]: https://github.com/rust-lang/cargo/pull/3978
889 [cargo/4214]: https://github.com/rust-lang/cargo/pull/4214
890 [cargo/4229]: https://github.com/rust-lang/cargo/pull/4229
891 [cargo/4248]: https://github.com/rust-lang/cargo/pull/4248
892 [cargo/4259]: https://github.com/rust-lang/cargo/pull/4259
893 [cargo/4270]: https://github.com/rust-lang/cargo/pull/4270
894 [`CStr::into_c_string`]: https://doc.rust-lang.org/std/ffi/struct.CStr.html#method.into_c_string
895 [`CString::as_c_str`]: https://doc.rust-lang.org/std/ffi/struct.CString.html#method.as_c_str
896 [`CString::into_boxed_c_str`]: https://doc.rust-lang.org/std/ffi/struct.CString.html#method.into_boxed_c_str
897 [`Chain::get_mut`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.get_mut
898 [`Chain::get_ref`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.get_ref
899 [`Chain::into_inner`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.into_inner
900 [`Option::get_or_insert_with`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.get_or_insert_with
901 [`Option::get_or_insert`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.get_or_insert
902 [`OsStr::into_os_string`]: https://doc.rust-lang.org/std/ffi/struct.OsStr.html#method.into_os_string
903 [`OsString::into_boxed_os_str`]: https://doc.rust-lang.org/std/ffi/struct.OsString.html#method.into_boxed_os_str
904 [`Take::get_mut`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.get_mut
905 [`Take::get_ref`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.get_ref
906 [`Utf8Error::error_len`]: https://doc.rust-lang.org/std/str/struct.Utf8Error.html#method.error_len
907 [`char::EscapeDebug`]: https://doc.rust-lang.org/std/char/struct.EscapeDebug.html
908 [`char::escape_debug`]: https://doc.rust-lang.org/std/primitive.char.html#method.escape_debug
909 [`compile_error!`]: https://doc.rust-lang.org/std/macro.compile_error.html
910 [`f32::from_bits`]: https://doc.rust-lang.org/std/primitive.f32.html#method.from_bits
911 [`f32::to_bits`]: https://doc.rust-lang.org/std/primitive.f32.html#method.to_bits
912 [`f64::from_bits`]: https://doc.rust-lang.org/std/primitive.f64.html#method.from_bits
913 [`f64::to_bits`]: https://doc.rust-lang.org/std/primitive.f64.html#method.to_bits
914 [`mem::ManuallyDrop`]: https://doc.rust-lang.org/std/mem/union.ManuallyDrop.html
915 [`slice::sort_unstable_by_key`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable_by_key
916 [`slice::sort_unstable_by`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable_by
917 [`slice::sort_unstable`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable
918 [`str::from_boxed_utf8_unchecked`]: https://doc.rust-lang.org/std/str/fn.from_boxed_utf8_unchecked.html
919 [`str::as_bytes_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.as_bytes_mut
920 [`str::from_utf8_mut`]: https://doc.rust-lang.org/std/str/fn.from_utf8_mut.html
921 [`str::from_utf8_unchecked_mut`]: https://doc.rust-lang.org/std/str/fn.from_utf8_unchecked_mut.html
922 [`str::get_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_mut
923 [`str::get_unchecked_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_unchecked_mut
924 [`str::get_unchecked`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_unchecked
925 [`str::get`]: https://doc.rust-lang.org/std/primitive.str.html#method.get
926 [`str::into_boxed_bytes`]: https://doc.rust-lang.org/std/primitive.str.html#method.into_boxed_bytes
929 Version 1.19.0 (2017-07-20)
930 ===========================
935 - [Numeric fields can now be used for creating tuple structs.][41145] [RFC 1506]
936 For example `struct Point(u32, u32); let x = Point { 0: 7, 1: 0 };`.
937 - [Macro recursion limit increased to 1024 from 64.][41676]
938 - [Added lint for detecting unused macros.][41907]
939 - [`loop` can now return a value with `break`.][42016] [RFC 1624]
940 For example: `let x = loop { break 7; };`
941 - [C compatible `union`s are now available.][42068] [RFC 1444] They can only
942 contain `Copy` types and cannot have a `Drop` implementation.
943 Example: `union Foo { bar: u8, baz: usize }`
944 - [Non capturing closures can now be coerced into `fn`s,][42162] [RFC 1558]
945 Example: `let foo: fn(u8) -> u8 = |v: u8| { v };`
950 - [Add support for bootstrapping the Rust compiler toolchain on Android.][41370]
951 - [Change `arm-linux-androideabi` to correspond to the `armeabi`
952 official ABI.][41656] If you wish to continue targeting the `armeabi-v7a` ABI
953 you should use `--target armv7-linux-androideabi`.
954 - [Fixed ICE when removing a source file between compilation sessions.][41873]
955 - [Minor optimisation of string operations.][42037]
956 - [Compiler error message is now `aborting due to previous error(s)` instead of
957 `aborting due to N previous errors`][42150] This was previously inaccurate and
958 would only count certain kinds of errors.
959 - [The compiler now supports Visual Studio 2017][42225]
960 - [The compiler is now built against LLVM 4.0.1 by default][42948]
961 - [Added a lot][42264] of [new error codes][42302]
962 - [Added `target-feature=+crt-static` option][37406] [RFC 1721] Which allows
963 libraries with C Run-time Libraries(CRT) to be statically linked.
964 - [Fixed various ARM codegen bugs][42740]
969 - [`String` now implements `FromIterator<Cow<'a, str>>` and
970 `Extend<Cow<'a, str>>`][41449]
971 - [`Vec` now implements `From<&mut [T]>`][41530]
972 - [`Box<[u8]>` now implements `From<Box<str>>`][41258]
973 - [`SplitWhitespace` now implements `Clone`][41659]
974 - [`[u8]::reverse` is now 5x faster and `[u16]::reverse` is now
976 - [`eprint!` and `eprintln!` macros added to prelude.][41192] Same as the `print!`
977 macros, but for printing to stderr.
982 - [`OsString::shrink_to_fit`]
985 - [`thread::ThreadId`]
990 - [Build scripts can now add environment variables to the environment
991 the crate is being compiled in.
992 Example: `println!("cargo:rustc-env=FOO=bar");`][cargo/3929]
993 - [Subcommands now replace the current process rather than spawning a new
994 child process][cargo/3970]
995 - [Workspace members can now accept glob file patterns][cargo/3979]
996 - [Added `--all` flag to the `cargo bench` subcommand to run benchmarks of all
997 the members in a given workspace.][cargo/3988]
998 - [Updated `libssh2-sys` to 0.2.6][cargo/4008]
999 - [Target directory path is now in the cargo metadata][cargo/4022]
1000 - [Cargo no longer checks out a local working directory for the
1001 crates.io index][cargo/4026] This should provide smaller file size for the
1002 registry, and improve cloning times, especially on Windows machines.
1003 - [Added an `--exclude` option for excluding certain packages when using the
1004 `--all` option][cargo/4031]
1005 - [Cargo will now automatically retry when receiving a 5xx error
1006 from crates.io][cargo/4032]
1007 - [The `--features` option now accepts multiple comma or space
1008 delimited values.][cargo/4084]
1009 - [Added support for custom target specific runners][cargo/3954]
1014 - [Added `rust-windbg.cmd`][39983] for loading rust `.natvis` files in the
1016 - [Rust will now release XZ compressed packages][rust-installer/57]
1017 - [rustup will now prefer to download rust packages with
1018 XZ compression][rustup/1100] over GZip packages.
1019 - [Added the ability to escape `#` in rust documentation][41785] By adding
1020 additional `#`'s ie. `##` is now `#`
1025 - [`MutexGuard<T>` may only be `Sync` if `T` is `Sync`.][41624]
1026 - [`-Z` flags are now no longer allowed to be used on the stable
1027 compiler.][41751] This has been a warning for a year previous to this.
1028 - [As a result of the `-Z` flag change, the `cargo-check` plugin no
1029 longer works][42844]. Users should migrate to the built-in `check`
1030 command, which has been available since 1.16.
1031 - [Ending a float literal with `._` is now a hard error.
1032 Example: `42._` .][41946]
1033 - [Any use of a private `extern crate` outside of its module is now a
1034 hard error.][36886] This was previously a warning.
1035 - [`use ::self::foo;` is now a hard error.][36888] `self` paths are always
1036 relative while the `::` prefix makes a path absolute, but was ignored and the
1037 path was relative regardless.
1038 - [Floating point constants in match patterns is now a hard error][36890]
1039 This was previously a warning.
1040 - [Struct or enum constants that don't derive `PartialEq` & `Eq` used
1041 match patterns is now a hard error][36891] This was previously a warning.
1042 - [Lifetimes named `'_` are no longer allowed.][36892] This was previously
1044 - [From the pound escape, lines consisting of multiple `#`s are
1046 - [It is an error to re-export private enum variants][42460]. This is
1047 known to break a number of crates that depend on an older version of
1049 - [On Windows, if `VCINSTALLDIR` is set incorrectly, `rustc` will try
1050 to use it to find the linker, and the build will fail where it did
1051 not previously][42607]
1053 [36886]: https://github.com/rust-lang/rust/issues/36886
1054 [36888]: https://github.com/rust-lang/rust/issues/36888
1055 [36890]: https://github.com/rust-lang/rust/issues/36890
1056 [36891]: https://github.com/rust-lang/rust/issues/36891
1057 [36892]: https://github.com/rust-lang/rust/issues/36892
1058 [37406]: https://github.com/rust-lang/rust/issues/37406
1059 [39983]: https://github.com/rust-lang/rust/pull/39983
1060 [41145]: https://github.com/rust-lang/rust/pull/41145
1061 [41192]: https://github.com/rust-lang/rust/pull/41192
1062 [41258]: https://github.com/rust-lang/rust/pull/41258
1063 [41370]: https://github.com/rust-lang/rust/pull/41370
1064 [41449]: https://github.com/rust-lang/rust/pull/41449
1065 [41530]: https://github.com/rust-lang/rust/pull/41530
1066 [41624]: https://github.com/rust-lang/rust/pull/41624
1067 [41656]: https://github.com/rust-lang/rust/pull/41656
1068 [41659]: https://github.com/rust-lang/rust/pull/41659
1069 [41676]: https://github.com/rust-lang/rust/pull/41676
1070 [41751]: https://github.com/rust-lang/rust/pull/41751
1071 [41764]: https://github.com/rust-lang/rust/pull/41764
1072 [41785]: https://github.com/rust-lang/rust/pull/41785
1073 [41873]: https://github.com/rust-lang/rust/pull/41873
1074 [41907]: https://github.com/rust-lang/rust/pull/41907
1075 [41946]: https://github.com/rust-lang/rust/pull/41946
1076 [42016]: https://github.com/rust-lang/rust/pull/42016
1077 [42037]: https://github.com/rust-lang/rust/pull/42037
1078 [42068]: https://github.com/rust-lang/rust/pull/42068
1079 [42150]: https://github.com/rust-lang/rust/pull/42150
1080 [42162]: https://github.com/rust-lang/rust/pull/42162
1081 [42225]: https://github.com/rust-lang/rust/pull/42225
1082 [42264]: https://github.com/rust-lang/rust/pull/42264
1083 [42302]: https://github.com/rust-lang/rust/pull/42302
1084 [42460]: https://github.com/rust-lang/rust/issues/42460
1085 [42607]: https://github.com/rust-lang/rust/issues/42607
1086 [42740]: https://github.com/rust-lang/rust/pull/42740
1087 [42844]: https://github.com/rust-lang/rust/issues/42844
1088 [42948]: https://github.com/rust-lang/rust/pull/42948
1089 [RFC 1444]: https://github.com/rust-lang/rfcs/pull/1444
1090 [RFC 1506]: https://github.com/rust-lang/rfcs/pull/1506
1091 [RFC 1558]: https://github.com/rust-lang/rfcs/pull/1558
1092 [RFC 1624]: https://github.com/rust-lang/rfcs/pull/1624
1093 [RFC 1721]: https://github.com/rust-lang/rfcs/pull/1721
1094 [`Command::envs`]: https://doc.rust-lang.org/std/process/struct.Command.html#method.envs
1095 [`OsString::shrink_to_fit`]: https://doc.rust-lang.org/std/ffi/struct.OsString.html#method.shrink_to_fit
1096 [`cmp::Reverse`]: https://doc.rust-lang.org/std/cmp/struct.Reverse.html
1097 [`thread::ThreadId`]: https://doc.rust-lang.org/std/thread/struct.ThreadId.html
1098 [cargo/3929]: https://github.com/rust-lang/cargo/pull/3929
1099 [cargo/3954]: https://github.com/rust-lang/cargo/pull/3954
1100 [cargo/3970]: https://github.com/rust-lang/cargo/pull/3970
1101 [cargo/3979]: https://github.com/rust-lang/cargo/pull/3979
1102 [cargo/3988]: https://github.com/rust-lang/cargo/pull/3988
1103 [cargo/4008]: https://github.com/rust-lang/cargo/pull/4008
1104 [cargo/4022]: https://github.com/rust-lang/cargo/pull/4022
1105 [cargo/4026]: https://github.com/rust-lang/cargo/pull/4026
1106 [cargo/4031]: https://github.com/rust-lang/cargo/pull/4031
1107 [cargo/4032]: https://github.com/rust-lang/cargo/pull/4032
1108 [cargo/4084]: https://github.com/rust-lang/cargo/pull/4084
1109 [rust-installer/57]: https://github.com/rust-lang/rust-installer/pull/57
1110 [rustup/1100]: https://github.com/rust-lang-nursery/rustup.rs/pull/1100
1113 Version 1.18.0 (2017-06-08)
1114 ===========================
1119 - [Stabilize pub(restricted)][40556] `pub` can now accept a module path to
1120 make the item visible to just that module tree. Also accepts the keyword
1121 `crate` to make something public to the whole crate but not users of the
1122 library. Example: `pub(crate) mod utils;`. [RFC 1422].
1123 - [Stabilize `#![windows_subsystem]` attribute][40870] conservative exposure of the
1124 `/SUBSYSTEM` linker flag on Windows platforms. [RFC 1665].
1125 - [Refactor of trait object type parsing][40043] Now `ty` in macros can accept
1126 types like `Write + Send`, trailing `+` are now supported in trait objects,
1127 and better error reporting for trait objects starting with `?Sized`.
1128 - [0e+10 is now a valid floating point literal][40589]
1129 - [Now warns if you bind a lifetime parameter to 'static][40734]
1130 - [Tuples, Enum variant fields, and structs with no `repr` attribute or with
1131 `#[repr(Rust)]` are reordered to minimize padding and produce a smaller
1132 representation in some cases.][40377]
1137 - [rustc can now emit mir with `--emit mir`][39891]
1138 - [Improved LLVM IR for trivial functions][40367]
1139 - [Added explanation for E0090(Wrong number of lifetimes are supplied)][40723]
1140 - [rustc compilation is now 15%-20% faster][41469] Thanks to optimisation
1141 opportunities found through profiling
1142 - [Improved backtrace formatting when panicking][38165]
1147 - [Specialized `Vec::from_iter` being passed `vec::IntoIter`][40731] if the
1148 iterator hasn't been advanced the original `Vec` is reassembled with no actual
1149 iteration or reallocation.
1150 - [Simplified HashMap Bucket interface][40561] provides performance
1151 improvements for iterating and cloning.
1152 - [Specialize Vec::from_elem to use calloc][40409]
1153 - [Fixed Race condition in fs::create_dir_all][39799]
1154 - [No longer caching stdio on Windows][40516]
1155 - [Optimized insertion sort in slice][40807] insertion sort in some cases
1156 2.50%~ faster and in one case now 12.50% faster.
1157 - [Optimized `AtomicBool::fetch_nand`][41143]
1162 - [`Child::try_wait`]
1163 - [`HashMap::retain`]
1164 - [`HashSet::retain`]
1166 - [`TcpStream::peek`]
1167 - [`UdpSocket::peek`]
1168 - [`UdpSocket::peek_from`]
1173 - [Added partial Pijul support][cargo/3842] Pijul is a version control system in Rust.
1174 You can now create new cargo projects with Pijul using `cargo new --vcs pijul`
1175 - [Now always emits build script warnings for crates that fail to build][cargo/3847]
1176 - [Added Android build support][cargo/3885]
1177 - [Added `--bins` and `--tests` flags][cargo/3901] now you can build all programs
1178 of a certain type, for example `cargo build --bins` will build all
1180 - [Added support for haiku][cargo/3952]
1185 - [rustdoc can now use pulldown-cmark with the `--enable-commonmark` flag][40338]
1186 - [Added rust-windbg script for better debugging on Windows][39983]
1187 - [Rust now uses the official cross compiler for NetBSD][40612]
1188 - [rustdoc now accepts `#` at the start of files][40828]
1189 - [Fixed jemalloc support for musl][41168]
1194 - [Changes to how the `0` flag works in format!][40241] Padding zeroes are now
1195 always placed after the sign if it exists and before the digits. With the `#`
1196 flag the zeroes are placed after the prefix and before the digits.
1197 - [Due to the struct field optimisation][40377], using `transmute` on structs
1198 that have no `repr` attribute or `#[repr(Rust)]` will no longer work. This has
1199 always been undefined behavior, but is now more likely to break in practice.
1200 - [The refactor of trait object type parsing][40043] fixed a bug where `+` was
1201 receiving the wrong priority parsing things like `&for<'a> Tr<'a> + Send` as
1202 `&(for<'a> Tr<'a> + Send)` instead of `(&for<'a> Tr<'a>) + Send`
1203 - [Overlapping inherent `impl`s are now a hard error][40728]
1204 - [`PartialOrd` and `Ord` must agree on the ordering.][41270]
1205 - [`rustc main.rs -o out --emit=asm,llvm-ir`][41085] Now will output
1206 `out.asm` and `out.ll` instead of only one of the filetypes.
1207 - [ calling a function that returns `Self` will no longer work][41805] when
1208 the size of `Self` cannot be statically determined.
1209 - [rustc now builds with a "pthreads" flavour of MinGW for Windows GNU][40805]
1210 this has caused a few regressions namely:
1212 - Changed the link order of local static/dynamic libraries (respecting the
1213 order on given rather than having the compiler reorder).
1214 - Changed how MinGW is linked, native code linked to dynamic libraries
1215 may require manually linking to the gcc support library (for the native
1218 [38165]: https://github.com/rust-lang/rust/pull/38165
1219 [39799]: https://github.com/rust-lang/rust/pull/39799
1220 [39891]: https://github.com/rust-lang/rust/pull/39891
1221 [39983]: https://github.com/rust-lang/rust/pull/39983
1222 [40043]: https://github.com/rust-lang/rust/pull/40043
1223 [40241]: https://github.com/rust-lang/rust/pull/40241
1224 [40338]: https://github.com/rust-lang/rust/pull/40338
1225 [40367]: https://github.com/rust-lang/rust/pull/40367
1226 [40377]: https://github.com/rust-lang/rust/pull/40377
1227 [40409]: https://github.com/rust-lang/rust/pull/40409
1228 [40516]: https://github.com/rust-lang/rust/pull/40516
1229 [40556]: https://github.com/rust-lang/rust/pull/40556
1230 [40561]: https://github.com/rust-lang/rust/pull/40561
1231 [40589]: https://github.com/rust-lang/rust/pull/40589
1232 [40612]: https://github.com/rust-lang/rust/pull/40612
1233 [40723]: https://github.com/rust-lang/rust/pull/40723
1234 [40728]: https://github.com/rust-lang/rust/pull/40728
1235 [40731]: https://github.com/rust-lang/rust/pull/40731
1236 [40734]: https://github.com/rust-lang/rust/pull/40734
1237 [40805]: https://github.com/rust-lang/rust/pull/40805
1238 [40807]: https://github.com/rust-lang/rust/pull/40807
1239 [40828]: https://github.com/rust-lang/rust/pull/40828
1240 [40870]: https://github.com/rust-lang/rust/pull/40870
1241 [41085]: https://github.com/rust-lang/rust/pull/41085
1242 [41143]: https://github.com/rust-lang/rust/pull/41143
1243 [41168]: https://github.com/rust-lang/rust/pull/41168
1244 [41270]: https://github.com/rust-lang/rust/issues/41270
1245 [41469]: https://github.com/rust-lang/rust/pull/41469
1246 [41805]: https://github.com/rust-lang/rust/issues/41805
1247 [RFC 1422]: https://github.com/rust-lang/rfcs/blob/master/text/1422-pub-restricted.md
1248 [RFC 1665]: https://github.com/rust-lang/rfcs/blob/master/text/1665-windows-subsystem.md
1249 [`Child::try_wait`]: https://doc.rust-lang.org/std/process/struct.Child.html#method.try_wait
1250 [`HashMap::retain`]: https://doc.rust-lang.org/std/collections/struct.HashMap.html#method.retain
1251 [`HashSet::retain`]: https://doc.rust-lang.org/std/collections/struct.HashSet.html#method.retain
1252 [`PeekMut::pop`]: https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html#method.pop
1253 [`TcpStream::peek`]: https://doc.rust-lang.org/std/net/struct.TcpStream.html#method.peek
1254 [`UdpSocket::peek_from`]: https://doc.rust-lang.org/std/net/struct.UdpSocket.html#method.peek_from
1255 [`UdpSocket::peek`]: https://doc.rust-lang.org/std/net/struct.UdpSocket.html#method.peek
1256 [cargo/3842]: https://github.com/rust-lang/cargo/pull/3842
1257 [cargo/3847]: https://github.com/rust-lang/cargo/pull/3847
1258 [cargo/3885]: https://github.com/rust-lang/cargo/pull/3885
1259 [cargo/3901]: https://github.com/rust-lang/cargo/pull/3901
1260 [cargo/3952]: https://github.com/rust-lang/cargo/pull/3952
1263 Version 1.17.0 (2017-04-27)
1264 ===========================
1269 * [The lifetime of statics and consts defaults to `'static`][39265]. [RFC 1623]
1270 * [Fields of structs may be initialized without duplicating the field/variable
1271 names][39761]. [RFC 1682]
1272 * [`Self` may be included in the `where` clause of `impls`][38864]. [RFC 1647]
1273 * [When coercing to an unsized type lifetimes must be equal][40319]. That is,
1274 there is no subtyping between `T` and `U` when `T: Unsize<U>`. For example,
1275 coercing `&mut [&'a X; N]` to `&mut [&'b X]` requires `'a` be equal to
1276 `'b`. Soundness fix.
1277 * [Values passed to the indexing operator, `[]`, automatically coerce][40166]
1278 * [Static variables may contain references to other statics][40027]
1283 * [Exit quickly on only `--emit dep-info`][40336]
1284 * [Make `-C relocation-model` more correctly determine whether the linker
1285 creates a position-independent executable][40245]
1286 * [Add `-C overflow-checks` to directly control whether integer overflow
1288 * [The rustc type checker now checks items on demand instead of in a single
1289 in-order pass][40008]. This is mostly an internal refactoring in support of
1290 future work, including incremental type checking, but also resolves [RFC
1291 1647], allowing `Self` to appear in `impl` `where` clauses.
1292 * [Optimize vtable loads][39995]
1293 * [Turn off vectorization for Emscripten targets][39990]
1294 * [Provide suggestions for unknown macros imported with `use`][39953]
1295 * [Fix ICEs in path resolution][39939]
1296 * [Strip exception handling code on Emscripten when `panic=abort`][39193]
1297 * [Add clearer error message using `&str + &str`][39116]
1308 * [`Ordering::then`]
1309 * [`Ordering::then_with`]
1310 * [`BTreeMap::range`]
1311 * [`BTreeMap::range_mut`]
1312 * [`collections::Bound`]
1313 * [`process::abort`]
1314 * [`ptr::read_unaligned`]
1315 * [`ptr::write_unaligned`]
1316 * [`Result::expect_err`]
1319 * [`Cell::into_inner`]
1325 * [`BTreeMap` and `BTreeSet` can iterate over ranges][27787]
1326 * [`Cell` can store non-`Copy` types][39793]. [RFC 1651]
1327 * [`String` implements `FromIterator<&char>`][40028]
1328 * `Box` [implements][40009] a number of new conversions:
1329 `From<Box<str>> for String`,
1330 `From<Box<[T]>> for Vec<T>`,
1331 `From<Box<CStr>> for CString`,
1332 `From<Box<OsStr>> for OsString`,
1333 `From<Box<Path>> for PathBuf`,
1334 `Into<Box<str>> for String`,
1335 `Into<Box<[T]>> for Vec<T>`,
1336 `Into<Box<CStr>> for CString`,
1337 `Into<Box<OsStr>> for OsString`,
1338 `Into<Box<Path>> for PathBuf`,
1339 `Default for Box<str>`,
1340 `Default for Box<CStr>`,
1341 `Default for Box<OsStr>`,
1342 `From<&CStr> for Box<CStr>`,
1343 `From<&OsStr> for Box<OsStr>`,
1344 `From<&Path> for Box<Path>`
1345 * [`ffi::FromBytesWithNulError` implements `Error` and `Display`][39960]
1346 * [Specialize `PartialOrd<A> for [A] where A: Ord`][39642]
1347 * [Slightly optimize `slice::sort`][39538]
1348 * [Add `ToString` trait specialization for `Cow<'a, str>` and `String`][39440]
1349 * [`Box<[T]>` implements `From<&[T]> where T: Copy`,
1350 `Box<str>` implements `From<&str>`][39438]
1351 * [`IpAddr` implements `From` for various arrays. `SocketAddr` implements
1352 `From<(I, u16)> where I: Into<IpAddr>`][39372]
1353 * [`format!` estimates the needed capacity before writing a string][39356]
1354 * [Support unprivileged symlink creation in Windows][38921]
1355 * [`PathBuf` implements `Default`][38764]
1356 * [Implement `PartialEq<[A]>` for `VecDeque<A>`][38661]
1357 * [`HashMap` resizes adaptively][38368] to guard against DOS attacks
1358 and poor hash functions.
1363 * [Add `cargo check --all`][cargo/3731]
1364 * [Add an option to ignore SSL revocation checking][cargo/3699]
1365 * [Add `cargo run --package`][cargo/3691]
1366 * [Add `required_features`][cargo/3667]
1367 * [Assume `build.rs` is a build script][cargo/3664]
1368 * [Find workspace via `workspace_root` link in containing member][cargo/3562]
1373 * [Documentation is rendered with mdbook instead of the obsolete, in-tree
1375 * [The "Unstable Book" documents nightly-only features][ubook]
1376 * [Improve the style of the sidebar in rustdoc output][40265]
1377 * [Configure build correctly on 64-bit CPU's with the armhf ABI][40261]
1378 * [Fix MSP430 breakage due to `i128`][40257]
1379 * [Preliminary Solaris/SPARCv9 support][39903]
1380 * [`rustc` is linked statically on Windows MSVC targets][39837], allowing it to
1381 run without installing the MSVC runtime.
1382 * [`rustdoc --test` includes file names in test names][39788]
1383 * This release includes builds of `std` for `sparc64-unknown-linux-gnu`,
1384 `aarch64-unknown-linux-fuchsia`, and `x86_64-unknown-linux-fuchsia`.
1385 * [Initial support for `aarch64-unknown-freebsd`][39491]
1386 * [Initial support for `i686-unknown-netbsd`][39426]
1387 * [This release no longer includes the old makefile build system][39431]. Rust
1388 is built with a custom build system, written in Rust, and with Cargo.
1389 * [Add Debug implementations for libcollection structs][39002]
1390 * [`TypeId` implements `PartialOrd` and `Ord`][38981]
1391 * [`--test-threads=0` produces an error][38945]
1392 * [`rustup` installs documentation by default][40526]
1393 * [The Rust source includes NatVis visualizations][39843]. These can be used by
1394 WinDbg and Visual Studio to improve the debugging experience.
1399 * [Rust 1.17 does not correctly detect the MSVC 2017 linker][38584]. As a
1400 workaround, either use MSVC 2015 or run vcvars.bat.
1401 * [When coercing to an unsized type lifetimes must be equal][40319]. That is,
1402 disallow subtyping between `T` and `U` when `T: Unsize<U>`, e.g. coercing
1403 `&mut [&'a X; N]` to `&mut [&'b X]` requires `'a` be equal to `'b`. Soundness
1405 * [`format!` and `Display::to_string` panic if an underlying formatting
1406 implementation returns an error][40117]. Previously the error was silently
1407 ignored. It is incorrect for `write_fmt` to return an error when writing
1409 * [In-tree crates are verified to be unstable][39851]. Previously, some minor
1410 crates were marked stable and could be accessed from the stable toolchain.
1411 * [Rust git source no longer includes vendored crates][39728]. Those that need
1412 to build with vendored crates should build from release tarballs.
1413 * [Fix inert attributes from `proc_macro_derives`][39572]
1414 * [During crate resolution, rustc prefers a crate in the sysroot if two crates
1415 are otherwise identical][39518]. Unlikely to be encountered outside the Rust
1417 * [Fixed bugs around how type inference interacts with dead-code][39485]. The
1418 existing code generally ignores the type of dead-code unless a type-hint is
1419 provided; this can cause surprising inference interactions particularly around
1420 defaulting. The new code uniformly ignores the result type of dead-code.
1421 * [Tuple-struct constructors with private fields are no longer visible][38932]
1422 * [Lifetime parameters that do not appear in the arguments are now considered
1423 early-bound][38897], resolving a soundness bug (#[32330]). The
1424 `hr_lifetime_in_assoc_type` future-compatibility lint has been in effect since
1426 * [rustdoc: fix doctests with non-feature crate attributes][38161]
1427 * [Make transmuting from fn item types to pointer-sized types a hard
1430 [27787]: https://github.com/rust-lang/rust/issues/27787
1431 [32330]: https://github.com/rust-lang/rust/issues/32330
1432 [34198]: https://github.com/rust-lang/rust/pull/34198
1433 [38161]: https://github.com/rust-lang/rust/pull/38161
1434 [38368]: https://github.com/rust-lang/rust/pull/38368
1435 [38584]: https://github.com/rust-lang/rust/issues/38584
1436 [38661]: https://github.com/rust-lang/rust/pull/38661
1437 [38764]: https://github.com/rust-lang/rust/pull/38764
1438 [38864]: https://github.com/rust-lang/rust/issues/38864
1439 [38897]: https://github.com/rust-lang/rust/pull/38897
1440 [38921]: https://github.com/rust-lang/rust/pull/38921
1441 [38932]: https://github.com/rust-lang/rust/pull/38932
1442 [38945]: https://github.com/rust-lang/rust/pull/38945
1443 [38981]: https://github.com/rust-lang/rust/pull/38981
1444 [39002]: https://github.com/rust-lang/rust/pull/39002
1445 [39116]: https://github.com/rust-lang/rust/pull/39116
1446 [39193]: https://github.com/rust-lang/rust/pull/39193
1447 [39265]: https://github.com/rust-lang/rust/pull/39265
1448 [39356]: https://github.com/rust-lang/rust/pull/39356
1449 [39372]: https://github.com/rust-lang/rust/pull/39372
1450 [39426]: https://github.com/rust-lang/rust/pull/39426
1451 [39431]: https://github.com/rust-lang/rust/pull/39431
1452 [39438]: https://github.com/rust-lang/rust/pull/39438
1453 [39440]: https://github.com/rust-lang/rust/pull/39440
1454 [39485]: https://github.com/rust-lang/rust/pull/39485
1455 [39491]: https://github.com/rust-lang/rust/pull/39491
1456 [39518]: https://github.com/rust-lang/rust/pull/39518
1457 [39538]: https://github.com/rust-lang/rust/pull/39538
1458 [39572]: https://github.com/rust-lang/rust/pull/39572
1459 [39633]: https://github.com/rust-lang/rust/pull/39633
1460 [39642]: https://github.com/rust-lang/rust/pull/39642
1461 [39728]: https://github.com/rust-lang/rust/pull/39728
1462 [39761]: https://github.com/rust-lang/rust/pull/39761
1463 [39788]: https://github.com/rust-lang/rust/pull/39788
1464 [39793]: https://github.com/rust-lang/rust/pull/39793
1465 [39837]: https://github.com/rust-lang/rust/pull/39837
1466 [39843]: https://github.com/rust-lang/rust/pull/39843
1467 [39851]: https://github.com/rust-lang/rust/pull/39851
1468 [39903]: https://github.com/rust-lang/rust/pull/39903
1469 [39939]: https://github.com/rust-lang/rust/pull/39939
1470 [39953]: https://github.com/rust-lang/rust/pull/39953
1471 [39960]: https://github.com/rust-lang/rust/pull/39960
1472 [39990]: https://github.com/rust-lang/rust/pull/39990
1473 [39995]: https://github.com/rust-lang/rust/pull/39995
1474 [40008]: https://github.com/rust-lang/rust/pull/40008
1475 [40009]: https://github.com/rust-lang/rust/pull/40009
1476 [40027]: https://github.com/rust-lang/rust/pull/40027
1477 [40028]: https://github.com/rust-lang/rust/pull/40028
1478 [40037]: https://github.com/rust-lang/rust/pull/40037
1479 [40117]: https://github.com/rust-lang/rust/pull/40117
1480 [40166]: https://github.com/rust-lang/rust/pull/40166
1481 [40245]: https://github.com/rust-lang/rust/pull/40245
1482 [40257]: https://github.com/rust-lang/rust/pull/40257
1483 [40261]: https://github.com/rust-lang/rust/pull/40261
1484 [40265]: https://github.com/rust-lang/rust/pull/40265
1485 [40319]: https://github.com/rust-lang/rust/pull/40319
1486 [40336]: https://github.com/rust-lang/rust/pull/40336
1487 [40526]: https://github.com/rust-lang/rust/pull/40526
1488 [RFC 1623]: https://github.com/rust-lang/rfcs/blob/master/text/1623-static.md
1489 [RFC 1647]: https://github.com/rust-lang/rfcs/blob/master/text/1647-allow-self-in-where-clauses.md
1490 [RFC 1651]: https://github.com/rust-lang/rfcs/blob/master/text/1651-movecell.md
1491 [RFC 1682]: https://github.com/rust-lang/rfcs/blob/master/text/1682-field-init-shorthand.md
1492 [`Arc::from_raw`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.from_raw
1493 [`Arc::into_raw`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.into_raw
1494 [`Arc::ptr_eq`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.ptr_eq
1495 [`BTreeMap::range_mut`]: https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.range_mut
1496 [`BTreeMap::range`]: https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.range
1497 [`Cell::into_inner`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.into_inner
1498 [`Cell::replace`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.replace
1499 [`Cell::swap`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.swap
1500 [`Cell::take`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.take
1501 [`Ordering::then_with`]: https://doc.rust-lang.org/std/cmp/enum.Ordering.html#method.then_with
1502 [`Ordering::then`]: https://doc.rust-lang.org/std/cmp/enum.Ordering.html#method.then
1503 [`Rc::from_raw`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.from_raw
1504 [`Rc::into_raw`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.into_raw
1505 [`Rc::ptr_eq`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.ptr_eq
1506 [`Result::expect_err`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.expect_err
1507 [`collections::Bound`]: https://doc.rust-lang.org/std/collections/enum.Bound.html
1508 [`process::abort`]: https://doc.rust-lang.org/std/process/fn.abort.html
1509 [`ptr::read_unaligned`]: https://doc.rust-lang.org/std/ptr/fn.read_unaligned.html
1510 [`ptr::write_unaligned`]: https://doc.rust-lang.org/std/ptr/fn.write_unaligned.html
1511 [cargo/3562]: https://github.com/rust-lang/cargo/pull/3562
1512 [cargo/3664]: https://github.com/rust-lang/cargo/pull/3664
1513 [cargo/3667]: https://github.com/rust-lang/cargo/pull/3667
1514 [cargo/3691]: https://github.com/rust-lang/cargo/pull/3691
1515 [cargo/3699]: https://github.com/rust-lang/cargo/pull/3699
1516 [cargo/3731]: https://github.com/rust-lang/cargo/pull/3731
1517 [mdbook]: https://crates.io/crates/mdbook
1518 [ubook]: https://doc.rust-lang.org/unstable-book/
1521 Version 1.16.0 (2017-03-16)
1522 ===========================
1527 * [The compiler's `dead_code` lint now accounts for type aliases][38051].
1528 * [Uninhabitable enums (those without any variants) no longer permit wildcard
1529 match patterns][38069]
1530 * [Clean up semantics of `self` in an import list][38313]
1531 * [`Self` may appear in `impl` headers][38920]
1532 * [`Self` may appear in struct expressions][39282]
1537 * [`rustc` now supports `--emit=metadata`, which causes rustc to emit
1538 a `.rmeta` file containing only crate metadata][38571]. This can be
1539 used by tools like the Rust Language Service to perform
1540 metadata-only builds.
1541 * [Levenshtein based typo suggestions now work in most places, while
1542 previously they worked only for fields and sometimes for local
1543 variables][38927]. Together with the overhaul of "no
1544 resolution"/"unexpected resolution" errors (#[38154]) they result in
1545 large and systematic improvement in resolution diagnostics.
1546 * [Fix `transmute::<T, U>` where `T` requires a bigger alignment than
1548 * [rustc: use -Xlinker when specifying an rpath with ',' in it][38798]
1549 * [`rustc` no longer attempts to provide "consider using an explicit
1550 lifetime" suggestions][37057]. They were inaccurate.
1555 * [`VecDeque::truncate`]
1556 * [`VecDeque::resize`]
1557 * [`String::insert_str`]
1558 * [`Duration::checked_add`]
1559 * [`Duration::checked_sub`]
1560 * [`Duration::checked_div`]
1561 * [`Duration::checked_mul`]
1564 * [`SocketAddr::is_ipv4`]
1565 * [`SocketAddr::is_ipv6`]
1566 * [`IpAddr::is_ipv4`]
1567 * [`IpAddr::is_ipv6`]
1569 * [`Vec::dedup_by_key`]
1570 * [`Result::unwrap_or_default`]
1571 * [`<*const T>::wrapping_offset`]
1572 * [`<*mut T>::wrapping_offset`]
1573 * `CommandExt::creation_flags`
1574 * [`File::set_permissions`]
1575 * [`String::split_off`]
1580 * [`[T]::binary_search` and `[T]::binary_search_by_key` now take
1581 their argument by `Borrow` parameter][37761]
1582 * [All public types in std implement `Debug`][38006]
1583 * [`IpAddr` implements `From<Ipv4Addr>` and `From<Ipv6Addr>`][38327]
1584 * [`Ipv6Addr` implements `From<[u16; 8]>`][38131]
1585 * [Ctrl-Z returns from `Stdin.read()` when reading from the console on
1587 * [std: Fix partial writes in `LineWriter`][38062]
1588 * [std: Clamp max read/write sizes on Unix][38062]
1589 * [Use more specific panic message for `&str` slicing errors][38066]
1590 * [`TcpListener::set_only_v6` is deprecated][38304]. This
1591 functionality cannot be achieved in std currently.
1592 * [`writeln!`, like `println!`, now accepts a form with no string
1593 or formatting arguments, to just print a newline][38469]
1594 * [Implement `iter::Sum` and `iter::Product` for `Result`][38580]
1595 * [Reduce the size of static data in `std_unicode::tables`][38781]
1596 * [`char::EscapeDebug`, `EscapeDefault`, `EscapeUnicode`,
1597 `CaseMappingIter`, `ToLowercase`, `ToUppercase`, implement
1599 * [`Duration` implements `Sum`][38712]
1600 * [`String` implements `ToSocketAddrs`][39048]
1605 * [The `cargo check` command does a type check of a project without
1606 building it][cargo/3296]
1607 * [crates.io will display CI badges from Travis and AppVeyor, if
1608 specified in Cargo.toml][cargo/3546]
1609 * [crates.io will display categories listed in Cargo.toml][cargo/3301]
1610 * [Compilation profiles accept integer values for `debug`, in addition
1611 to `true` and `false`. These are passed to `rustc` as the value to
1612 `-C debuginfo`][cargo/3534]
1613 * [Implement `cargo --version --verbose`][cargo/3604]
1614 * [All builds now output 'dep-info' build dependencies compatible with
1615 make and ninja][cargo/3557]
1616 * [Build all workspace members with `build --all`][cargo/3511]
1617 * [Document all workspace members with `doc --all`][cargo/3515]
1618 * [Path deps outside workspace are not members][cargo/3443]
1623 * [`rustdoc` has a `--sysroot` argument that, like `rustc`, specifies
1624 the path to the Rust implementation][38589]
1625 * [The `armv7-linux-androideabi` target no longer enables NEON
1626 extensions, per Google's ABI guide][38413]
1627 * [The stock standard library can be compiled for Redox OS][38401]
1628 * [Rust has initial SPARC support][38726]. Tier 3. No builds
1630 * [Rust has experimental support for Nvidia PTX][38559]. Tier 3. No
1632 * [Fix backtraces on i686-pc-windows-gnu by disabling FPO][39379]
1637 * [Uninhabitable enums (those without any variants) no longer permit wildcard
1638 match patterns][38069]
1639 * In this release, references to uninhabited types can not be
1640 pattern-matched. This was accidentally allowed in 1.15.
1641 * [The compiler's `dead_code` lint now accounts for type aliases][38051].
1642 * [Ctrl-Z returns from `Stdin.read()` when reading from the console on
1644 * [Clean up semantics of `self` in an import list][38313]
1645 * Reimplemented lifetime elision. This change was almost entirely compatible
1646 with existing code, but it did close a number of small bugs and loopholes,
1647 as well as being more accepting in some other [cases][41105].
1649 [37057]: https://github.com/rust-lang/rust/pull/37057
1650 [37761]: https://github.com/rust-lang/rust/pull/37761
1651 [38006]: https://github.com/rust-lang/rust/pull/38006
1652 [38051]: https://github.com/rust-lang/rust/pull/38051
1653 [38062]: https://github.com/rust-lang/rust/pull/38062
1654 [38062]: https://github.com/rust-lang/rust/pull/38622
1655 [38066]: https://github.com/rust-lang/rust/pull/38066
1656 [38069]: https://github.com/rust-lang/rust/pull/38069
1657 [38131]: https://github.com/rust-lang/rust/pull/38131
1658 [38154]: https://github.com/rust-lang/rust/pull/38154
1659 [38274]: https://github.com/rust-lang/rust/pull/38274
1660 [38304]: https://github.com/rust-lang/rust/pull/38304
1661 [38313]: https://github.com/rust-lang/rust/pull/38313
1662 [38314]: https://github.com/rust-lang/rust/pull/38314
1663 [38327]: https://github.com/rust-lang/rust/pull/38327
1664 [38401]: https://github.com/rust-lang/rust/pull/38401
1665 [38413]: https://github.com/rust-lang/rust/pull/38413
1666 [38469]: https://github.com/rust-lang/rust/pull/38469
1667 [38559]: https://github.com/rust-lang/rust/pull/38559
1668 [38571]: https://github.com/rust-lang/rust/pull/38571
1669 [38580]: https://github.com/rust-lang/rust/pull/38580
1670 [38589]: https://github.com/rust-lang/rust/pull/38589
1671 [38670]: https://github.com/rust-lang/rust/pull/38670
1672 [38712]: https://github.com/rust-lang/rust/pull/38712
1673 [38726]: https://github.com/rust-lang/rust/pull/38726
1674 [38781]: https://github.com/rust-lang/rust/pull/38781
1675 [38798]: https://github.com/rust-lang/rust/pull/38798
1676 [38909]: https://github.com/rust-lang/rust/pull/38909
1677 [38920]: https://github.com/rust-lang/rust/pull/38920
1678 [38927]: https://github.com/rust-lang/rust/pull/38927
1679 [39048]: https://github.com/rust-lang/rust/pull/39048
1680 [39282]: https://github.com/rust-lang/rust/pull/39282
1681 [39379]: https://github.com/rust-lang/rust/pull/39379
1682 [41105]: https://github.com/rust-lang/rust/issues/41105
1683 [`<*const T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset
1684 [`<*mut T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset
1685 [`Duration::checked_add`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_add
1686 [`Duration::checked_div`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_div
1687 [`Duration::checked_mul`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_mul
1688 [`Duration::checked_sub`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_sub
1689 [`File::set_permissions`]: https://doc.rust-lang.org/std/fs/struct.File.html#method.set_permissions
1690 [`IpAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv4
1691 [`IpAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv6
1692 [`Result::unwrap_or_default`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.unwrap_or_default
1693 [`SocketAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv4
1694 [`SocketAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv6
1695 [`String::insert_str`]: https://doc.rust-lang.org/std/string/struct.String.html#method.insert_str
1696 [`String::split_off`]: https://doc.rust-lang.org/std/string/struct.String.html#method.split_off
1697 [`Vec::dedup_by_key`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by_key
1698 [`Vec::dedup_by`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by
1699 [`VecDeque::resize`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.resize
1700 [`VecDeque::truncate`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.truncate
1701 [`str::repeat`]: https://doc.rust-lang.org/std/primitive.str.html#method.repeat
1702 [`str::replacen`]: https://doc.rust-lang.org/std/primitive.str.html#method.replacen
1703 [cargo/3296]: https://github.com/rust-lang/cargo/pull/3296
1704 [cargo/3301]: https://github.com/rust-lang/cargo/pull/3301
1705 [cargo/3443]: https://github.com/rust-lang/cargo/pull/3443
1706 [cargo/3511]: https://github.com/rust-lang/cargo/pull/3511
1707 [cargo/3515]: https://github.com/rust-lang/cargo/pull/3515
1708 [cargo/3534]: https://github.com/rust-lang/cargo/pull/3534
1709 [cargo/3546]: https://github.com/rust-lang/cargo/pull/3546
1710 [cargo/3557]: https://github.com/rust-lang/cargo/pull/3557
1711 [cargo/3604]: https://github.com/rust-lang/cargo/pull/3604
1712 [RFC 1623]: https://github.com/rust-lang/rfcs/blob/master/text/1623-static.md
1715 Version 1.15.1 (2017-02-09)
1716 ===========================
1718 * [Fix IntoIter::as_mut_slice's signature][39466]
1719 * [Compile compiler builtins with `-fPIC` on 32-bit platforms][39523]
1721 [39466]: https://github.com/rust-lang/rust/pull/39466
1722 [39523]: https://github.com/rust-lang/rust/pull/39523
1725 Version 1.15.0 (2017-02-02)
1726 ===========================
1731 * Basic procedural macros allowing custom `#[derive]`, aka "macros 1.1", are
1732 stable. This allows popular code-generating crates like Serde and Diesel to
1733 work ergonomically. [RFC 1681].
1734 * [Tuple structs may be empty. Unary and empty tuple structs may be instantiated
1735 with curly braces][36868]. Part of [RFC 1506].
1736 * [A number of minor changes to name resolution have been activated][37127].
1737 They add up to more consistent semantics, allowing for future evolution of
1738 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
1739 details of what is different. The breaking changes here have been transitioned
1740 through the [`legacy_imports`] lint since 1.14, with no known regressions.
1741 * [In `macro_rules`, `path` fragments can now be parsed as type parameter
1743 * [`?Sized` can be used in `where` clauses][37791]
1744 * [There is now a limit on the size of monomorphized types and it can be
1745 modified with the `#![type_size_limit]` crate attribute, similarly to
1746 the `#![recursion_limit]` attribute][37789]
1751 * [On Windows, the compiler will apply dllimport attributes when linking to
1752 extern functions][37973]. Additional attributes and flags can control which
1753 library kind is linked and its name. [RFC 1717].
1754 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
1755 * [The `--test` flag works with procedural macro crates][38107]
1756 * [Fix `extern "aapcs" fn` ABI][37814]
1757 * [The `-C no-stack-check` flag is deprecated][37636]. It does nothing.
1758 * [The `format!` expander recognizes incorrect `printf` and shell-style
1759 formatting directives and suggests the correct format][37613].
1760 * [Only report one error for all unused imports in an import list][37456]
1762 Compiler Performance
1763 --------------------
1765 * [Avoid unnecessary `mk_ty` calls in `Ty::super_fold_with`][37705]
1766 * [Avoid more unnecessary `mk_ty` calls in `Ty::super_fold_with`][37979]
1767 * [Don't clone in `UnificationTable::probe`][37848]
1768 * [Remove `scope_auxiliary` to cut RSS by 10%][37764]
1769 * [Use small vectors in type walker][37760]
1770 * [Macro expansion performance was improved][37701]
1771 * [Change `HirVec<P<T>>` to `HirVec<T>` in `hir::Expr`][37642]
1772 * [Replace FNV with a faster hash function][37229]
1777 * [`std::iter::Iterator::min_by`]
1778 * [`std::iter::Iterator::max_by`]
1779 * [`std::os::*::fs::FileExt`]
1780 * [`std::sync::atomic::Atomic*::get_mut`]
1781 * [`std::sync::atomic::Atomic*::into_inner`]
1782 * [`std::vec::IntoIter::as_slice`]
1783 * [`std::vec::IntoIter::as_mut_slice`]
1784 * [`std::sync::mpsc::Receiver::try_iter`]
1785 * [`std::os::unix::process::CommandExt::before_exec`]
1786 * [`std::rc::Rc::strong_count`]
1787 * [`std::rc::Rc::weak_count`]
1788 * [`std::sync::Arc::strong_count`]
1789 * [`std::sync::Arc::weak_count`]
1790 * [`std::char::encode_utf8`]
1791 * [`std::char::encode_utf16`]
1792 * [`std::cell::Ref::clone`]
1793 * [`std::io::Take::into_inner`]
1798 * [The standard sorting algorithm has been rewritten for dramatic performance
1799 improvements][38192]. It is a hybrid merge sort, drawing influences from
1800 Timsort. Previously it was a naive merge sort.
1801 * [`Iterator::nth` no longer has a `Sized` bound][38134]
1802 * [`Extend<&T>` is specialized for `Vec` where `T: Copy`][38182] to improve
1804 * [`chars().count()` is much faster][37888] and so are [`chars().last()`
1805 and `char_indices().last()`][37882]
1806 * [Fix ARM Objective-C ABI in `std::env::args`][38146]
1807 * [Chinese characters display correctly in `fmt::Debug`][37855]
1808 * [Derive `Default` for `Duration`][37699]
1809 * [Support creation of anonymous pipes on WinXP/2k][37677]
1810 * [`mpsc::RecvTimeoutError` implements `Error`][37527]
1811 * [Don't pass overlapped handles to processes][38835]
1816 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
1817 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
1818 should instead check the variable at runtime with `std::env`. That the value
1819 was set at build time was a bug, and incorrect when cross-compiling. This
1820 change is known to cause breakage.
1821 * [Add `--all` flag to `cargo test`][cargo/3221]
1822 * [Compile statically against the MSVC CRT][cargo/3363]
1823 * [Mix feature flags into fingerprint/metadata shorthash][cargo/3102]
1824 * [Link OpenSSL statically on OSX][cargo/3311]
1825 * [Apply new fingerprinting to build dir outputs][cargo/3310]
1826 * [Test for bad path overrides with summaries][cargo/3336]
1827 * [Require `cargo install --vers` to take a semver version][cargo/3338]
1828 * [Fix retrying crate downloads for network errors][cargo/3348]
1829 * [Implement string lookup for `build.rustflags` config key][cargo/3356]
1830 * [Emit more info on --message-format=json][cargo/3319]
1831 * [Assume `build.rs` in the same directory as `Cargo.toml` is a build script][cargo/3361]
1832 * [Don't ignore errors in workspace manifest][cargo/3409]
1833 * [Fix `--message-format JSON` when rustc emits non-JSON warnings][cargo/3410]
1838 * [Test runners (binaries built with `--test`) now support a `--list` argument
1839 that lists the tests it contains][38185]
1840 * [Test runners now support a `--exact` argument that makes the test filter
1841 match exactly, instead of matching only a substring of the test name][38181]
1842 * [rustdoc supports a `--playground-url` flag][37763]
1843 * [rustdoc provides more details about `#[should_panic]` errors][37749]
1848 * [The Rust build system is now written in Rust][37817]. The Makefiles may
1849 continue to be used in this release by passing `--disable-rustbuild` to the
1850 configure script, but they will be deleted soon. Note that the new build
1851 system uses a different on-disk layout that will likely affect any scripts
1853 * [Rust supports i686-unknown-openbsd][38086]. Tier 3 support. No testing or
1855 * [Rust supports the MSP430][37627]. Tier 3 support. No testing or releases.
1856 * [Rust supports the ARMv5TE architecture][37615]. Tier 3 support. No testing or
1862 * [A number of minor changes to name resolution have been activated][37127].
1863 They add up to more consistent semantics, allowing for future evolution of
1864 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
1865 details of what is different. The breaking changes here have been transitioned
1866 through the [`legacy_imports`] lint since 1.14, with no known regressions.
1867 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
1868 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
1869 should instead check the variable at runtime with `std::env`. That the value
1870 was set at build time was a bug, and incorrect when cross-compiling. This
1871 change is known to cause breakage.
1872 * [Higher-ranked lifetimes are no longer allowed to appear _only_ in associated
1873 types][33685]. The [`hr_lifetime_in_assoc_type` lint] has been a warning since
1874 1.10 and is now an error by default. It will become a hard error in the near
1876 * [The semantics relating modules to file system directories are changing in
1877 minor ways][37602]. This is captured in the new `legacy_directory_ownership`
1878 lint, which is a warning in this release, and will become a hard error in the
1880 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
1881 * [Once `Peekable` peeks a `None` it will return that `None` without re-querying
1882 the underlying iterator][37834]
1884 ["changes"]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md#changes-to-name-resolution-rules
1885 [33685]: https://github.com/rust-lang/rust/issues/33685
1886 [36868]: https://github.com/rust-lang/rust/pull/36868
1887 [37127]: https://github.com/rust-lang/rust/pull/37127
1888 [37229]: https://github.com/rust-lang/rust/pull/37229
1889 [37456]: https://github.com/rust-lang/rust/pull/37456
1890 [37527]: https://github.com/rust-lang/rust/pull/37527
1891 [37602]: https://github.com/rust-lang/rust/pull/37602
1892 [37613]: https://github.com/rust-lang/rust/pull/37613
1893 [37615]: https://github.com/rust-lang/rust/pull/37615
1894 [37636]: https://github.com/rust-lang/rust/pull/37636
1895 [37627]: https://github.com/rust-lang/rust/pull/37627
1896 [37642]: https://github.com/rust-lang/rust/pull/37642
1897 [37677]: https://github.com/rust-lang/rust/pull/37677
1898 [37699]: https://github.com/rust-lang/rust/pull/37699
1899 [37701]: https://github.com/rust-lang/rust/pull/37701
1900 [37705]: https://github.com/rust-lang/rust/pull/37705
1901 [37749]: https://github.com/rust-lang/rust/pull/37749
1902 [37760]: https://github.com/rust-lang/rust/pull/37760
1903 [37763]: https://github.com/rust-lang/rust/pull/37763
1904 [37764]: https://github.com/rust-lang/rust/pull/37764
1905 [37789]: https://github.com/rust-lang/rust/pull/37789
1906 [37791]: https://github.com/rust-lang/rust/pull/37791
1907 [37814]: https://github.com/rust-lang/rust/pull/37814
1908 [37817]: https://github.com/rust-lang/rust/pull/37817
1909 [37834]: https://github.com/rust-lang/rust/pull/37834
1910 [37848]: https://github.com/rust-lang/rust/pull/37848
1911 [37855]: https://github.com/rust-lang/rust/pull/37855
1912 [37882]: https://github.com/rust-lang/rust/pull/37882
1913 [37888]: https://github.com/rust-lang/rust/pull/37888
1914 [37973]: https://github.com/rust-lang/rust/pull/37973
1915 [37979]: https://github.com/rust-lang/rust/pull/37979
1916 [38086]: https://github.com/rust-lang/rust/pull/38086
1917 [38107]: https://github.com/rust-lang/rust/pull/38107
1918 [38117]: https://github.com/rust-lang/rust/pull/38117
1919 [38134]: https://github.com/rust-lang/rust/pull/38134
1920 [38146]: https://github.com/rust-lang/rust/pull/38146
1921 [38181]: https://github.com/rust-lang/rust/pull/38181
1922 [38182]: https://github.com/rust-lang/rust/pull/38182
1923 [38185]: https://github.com/rust-lang/rust/pull/38185
1924 [38192]: https://github.com/rust-lang/rust/pull/38192
1925 [38279]: https://github.com/rust-lang/rust/pull/38279
1926 [38835]: https://github.com/rust-lang/rust/pull/38835
1927 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
1928 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
1929 [RFC 1560]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md
1930 [RFC 1681]: https://github.com/rust-lang/rfcs/blob/master/text/1681-macros-1.1.md
1931 [RFC 1717]: https://github.com/rust-lang/rfcs/blob/master/text/1717-dllimport.md
1932 [`hr_lifetime_in_assoc_type` lint]: https://github.com/rust-lang/rust/issues/33685
1933 [`legacy_imports`]: https://github.com/rust-lang/rust/pull/38271
1934 [cargo/3102]: https://github.com/rust-lang/cargo/pull/3102
1935 [cargo/3221]: https://github.com/rust-lang/cargo/pull/3221
1936 [cargo/3310]: https://github.com/rust-lang/cargo/pull/3310
1937 [cargo/3311]: https://github.com/rust-lang/cargo/pull/3311
1938 [cargo/3319]: https://github.com/rust-lang/cargo/pull/3319
1939 [cargo/3336]: https://github.com/rust-lang/cargo/pull/3336
1940 [cargo/3338]: https://github.com/rust-lang/cargo/pull/3338
1941 [cargo/3348]: https://github.com/rust-lang/cargo/pull/3348
1942 [cargo/3356]: https://github.com/rust-lang/cargo/pull/3356
1943 [cargo/3361]: https://github.com/rust-lang/cargo/pull/3361
1944 [cargo/3363]: https://github.com/rust-lang/cargo/pull/3363
1945 [cargo/3368]: https://github.com/rust-lang/cargo/issues/3368
1946 [cargo/3409]: https://github.com/rust-lang/cargo/pull/3409
1947 [cargo/3410]: https://github.com/rust-lang/cargo/pull/3410
1948 [`std::iter::Iterator::min_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.min_by
1949 [`std::iter::Iterator::max_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.max_by
1950 [`std::os::*::fs::FileExt`]: https://doc.rust-lang.org/std/os/unix/fs/trait.FileExt.html
1951 [`std::sync::atomic::Atomic*::get_mut`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.get_mut
1952 [`std::sync::atomic::Atomic*::into_inner`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.into_inner
1953 [`std::vec::IntoIter::as_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_slice
1954 [`std::vec::IntoIter::as_mut_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_mut_slice
1955 [`std::sync::mpsc::Receiver::try_iter`]: https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.try_iter
1956 [`std::os::unix::process::CommandExt::before_exec`]: https://doc.rust-lang.org/std/os/unix/process/trait.CommandExt.html#tymethod.before_exec
1957 [`std::rc::Rc::strong_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.strong_count
1958 [`std::rc::Rc::weak_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.weak_count
1959 [`std::sync::Arc::strong_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.strong_count
1960 [`std::sync::Arc::weak_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.weak_count
1961 [`std::char::encode_utf8`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf8
1962 [`std::char::encode_utf16`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf16
1963 [`std::cell::Ref::clone`]: https://doc.rust-lang.org/std/cell/struct.Ref.html#method.clone
1964 [`std::io::Take::into_inner`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.into_inner
1967 Version 1.14.0 (2016-12-22)
1968 ===========================
1973 * [`..` matches multiple tuple fields in enum variants, structs
1974 and tuples][36843]. [RFC 1492].
1975 * [Safe `fn` items can be coerced to `unsafe fn` pointers][37389]
1976 * [`use *` and `use ::*` both glob-import from the crate root][37367]
1977 * [It's now possible to call a `Vec<Box<Fn()>>` without explicit
1978 dereferencing][36822]
1983 * [Mark enums with non-zero discriminant as non-zero][37224]
1984 * [Lower-case `static mut` names are linted like other
1985 statics and consts][37162]
1986 * [Fix ICE on some macros in const integer positions
1987 (e.g. `[u8; m!()]`)][36819]
1988 * [Improve error message and snippet for "did you mean `x`"][36798]
1989 * [Add a panic-strategy field to the target specification][36794]
1990 * [Include LLVM version in `--version --verbose`][37200]
1992 Compile-time Optimizations
1993 --------------------------
1995 * [Improve macro expansion performance][37569]
1996 * [Shrink `Expr_::ExprInlineAsm`][37445]
1997 * [Replace all uses of SHA-256 with BLAKE2b][37439]
1998 * [Reduce the number of bytes hashed by `IchHasher`][37427]
1999 * [Avoid more allocations when compiling html5ever][37373]
2000 * [Use `SmallVector` in `CombineFields::instantiate`][37322]
2001 * [Avoid some allocations in the macro parser][37318]
2002 * [Use a faster deflate setting][37298]
2003 * [Add `ArrayVec` and `AccumulateVec` to reduce heap allocations
2004 during interning of slices][37270]
2005 * [Optimize `write_metadata`][37267]
2006 * [Don't process obligation forest cycles when stalled][37231]
2007 * [Avoid many `CrateConfig` clones][37161]
2008 * [Optimize `Substs::super_fold_with`][37108]
2009 * [Optimize `ObligationForest`'s `NodeState` handling][36993]
2010 * [Speed up `plug_leaks`][36917]
2015 * [`println!()`, with no arguments, prints newline][36825].
2016 Previously, an empty string was required to achieve the same.
2017 * [`Wrapping` impls standard binary and unary operators, as well as
2018 the `Sum` and `Product` iterators][37356]
2019 * [Implement `From<Cow<str>> for String` and `From<Cow<[T]>> for
2021 * [Improve `fold` performance for `chain`, `cloned`, `map`, and
2022 `VecDeque` iterators][37315]
2023 * [Improve `SipHasher` performance on small values][37312]
2024 * [Add Iterator trait TrustedLen to enable better FromIterator /
2026 * [Expand `.zip()` specialization to `.map()` and `.cloned()`][37230]
2027 * [`ReadDir` implements `Debug`][37221]
2028 * [Implement `RefUnwindSafe` for atomic types][37178]
2029 * [Specialize `Vec::extend` to `Vec::extend_from_slice`][37094]
2030 * [Avoid allocations in `Decoder::read_str`][37064]
2031 * [`io::Error` implements `From<io::ErrorKind>`][37037]
2032 * [Impl `Debug` for raw pointers to unsized data][36880]
2033 * [Don't reuse `HashMap` random seeds][37470]
2034 * [The internal memory layout of `HashMap` is more cache-friendly, for
2035 significant improvements in some operations][36692]
2036 * [`HashMap` uses less memory on 32-bit architectures][36595]
2037 * [Impl `Add<{str, Cow<str>}>` for `Cow<str>`][36430]
2042 * [Expose rustc cfg values to build scripts][cargo/3243]
2043 * [Allow cargo to work with read-only `CARGO_HOME`][cargo/3259]
2044 * [Fix passing --features when testing multiple packages][cargo/3280]
2045 * [Use a single profile set per workspace][cargo/3249]
2046 * [Load `replace` sections from lock files][cargo/3220]
2047 * [Ignore `panic` configuration for test/bench profiles][cargo/3175]
2052 * [rustup is the recommended Rust installation method][1.14rustup]
2053 * This release includes host (rustc) builds for Linux on MIPS, PowerPC, and
2054 S390x. These are [tier 2] platforms and may have major defects. Follow the
2055 instructions on the website to install, or add the targets to an existing
2056 installation with `rustup target add`. The new target triples are:
2057 - `mips-unknown-linux-gnu`
2058 - `mipsel-unknown-linux-gnu`
2059 - `mips64-unknown-linux-gnuabi64`
2060 - `mips64el-unknown-linux-gnuabi64 `
2061 - `powerpc-unknown-linux-gnu`
2062 - `powerpc64-unknown-linux-gnu`
2063 - `powerpc64le-unknown-linux-gnu`
2064 - `s390x-unknown-linux-gnu `
2065 * This release includes target (std) builds for ARM Linux running MUSL
2066 libc. These are [tier 2] platforms and may have major defects. Add the
2067 following triples to an existing rustup installation with `rustup target add`:
2068 - `arm-unknown-linux-musleabi`
2069 - `arm-unknown-linux-musleabihf`
2070 - `armv7-unknown-linux-musleabihf`
2071 * This release includes [experimental support for WebAssembly][1.14wasm], via
2072 the `wasm32-unknown-emscripten` target. This target is known to have major
2073 defects. Please test, report, and fix.
2074 * rustup no longer installs documentation by default. Run `rustup
2075 component add rust-docs` to install.
2076 * [Fix line stepping in debugger][37310]
2077 * [Enable line number debuginfo in releases][37280]
2082 * [Disable jemalloc on aarch64/powerpc/mips][37392]
2083 * [Add support for Fuchsia OS][37313]
2084 * [Detect local-rebuild by only MAJOR.MINOR version][37273]
2089 * [A number of forward-compatibility lints used by the compiler
2090 to gradually introduce language changes have been converted
2091 to deny by default][36894]:
2092 - ["use of inaccessible extern crate erroneously allowed"][36886]
2093 - ["type parameter default erroneously allowed in invalid location"][36887]
2094 - ["detects super or self keywords at the beginning of global path"][36888]
2095 - ["two overlapping inherent impls define an item with the same name
2096 were erroneously allowed"][36889]
2097 - ["floating-point constants cannot be used in patterns"][36890]
2098 - ["constants of struct or enum type can only be used in a pattern if
2099 the struct or enum has `#[derive(PartialEq, Eq)]`"][36891]
2100 - ["lifetimes or labels named `'_` were erroneously allowed"][36892]
2101 * [Prohibit patterns in trait methods without bodies][37378]
2102 * [The atomic `Ordering` enum may not be matched exhaustively][37351]
2103 * [Future-proofing `#[no_link]` breaks some obscure cases][37247]
2104 * [The `$crate` macro variable is accepted in fewer locations][37213]
2105 * [Impls specifying extra region requirements beyond the trait
2106 they implement are rejected][37167]
2107 * [Enums may not be unsized][37111]. Unsized enums are intended to
2108 work but never have. For now they are forbidden.
2109 * [Enforce the shadowing restrictions from RFC 1560 for today's macros][36767]
2111 [tier 2]: https://forge.rust-lang.org/platform-support.html
2112 [1.14rustup]: https://internals.rust-lang.org/t/beta-testing-rustup-rs/3316/204
2113 [1.14wasm]: https://users.rust-lang.org/t/compiling-to-the-web-with-rust-and-emscripten/7627
2114 [36430]: https://github.com/rust-lang/rust/pull/36430
2115 [36595]: https://github.com/rust-lang/rust/pull/36595
2116 [36595]: https://github.com/rust-lang/rust/pull/36595
2117 [36692]: https://github.com/rust-lang/rust/pull/36692
2118 [36767]: https://github.com/rust-lang/rust/pull/36767
2119 [36794]: https://github.com/rust-lang/rust/pull/36794
2120 [36798]: https://github.com/rust-lang/rust/pull/36798
2121 [36819]: https://github.com/rust-lang/rust/pull/36819
2122 [36822]: https://github.com/rust-lang/rust/pull/36822
2123 [36825]: https://github.com/rust-lang/rust/pull/36825
2124 [36843]: https://github.com/rust-lang/rust/pull/36843
2125 [36880]: https://github.com/rust-lang/rust/pull/36880
2126 [36886]: https://github.com/rust-lang/rust/issues/36886
2127 [36887]: https://github.com/rust-lang/rust/issues/36887
2128 [36888]: https://github.com/rust-lang/rust/issues/36888
2129 [36889]: https://github.com/rust-lang/rust/issues/36889
2130 [36890]: https://github.com/rust-lang/rust/issues/36890
2131 [36891]: https://github.com/rust-lang/rust/issues/36891
2132 [36892]: https://github.com/rust-lang/rust/issues/36892
2133 [36894]: https://github.com/rust-lang/rust/pull/36894
2134 [36917]: https://github.com/rust-lang/rust/pull/36917
2135 [36993]: https://github.com/rust-lang/rust/pull/36993
2136 [37037]: https://github.com/rust-lang/rust/pull/37037
2137 [37064]: https://github.com/rust-lang/rust/pull/37064
2138 [37094]: https://github.com/rust-lang/rust/pull/37094
2139 [37108]: https://github.com/rust-lang/rust/pull/37108
2140 [37111]: https://github.com/rust-lang/rust/pull/37111
2141 [37161]: https://github.com/rust-lang/rust/pull/37161
2142 [37162]: https://github.com/rust-lang/rust/pull/37162
2143 [37167]: https://github.com/rust-lang/rust/pull/37167
2144 [37178]: https://github.com/rust-lang/rust/pull/37178
2145 [37200]: https://github.com/rust-lang/rust/pull/37200
2146 [37213]: https://github.com/rust-lang/rust/pull/37213
2147 [37221]: https://github.com/rust-lang/rust/pull/37221
2148 [37224]: https://github.com/rust-lang/rust/pull/37224
2149 [37230]: https://github.com/rust-lang/rust/pull/37230
2150 [37231]: https://github.com/rust-lang/rust/pull/37231
2151 [37247]: https://github.com/rust-lang/rust/pull/37247
2152 [37267]: https://github.com/rust-lang/rust/pull/37267
2153 [37270]: https://github.com/rust-lang/rust/pull/37270
2154 [37273]: https://github.com/rust-lang/rust/pull/37273
2155 [37280]: https://github.com/rust-lang/rust/pull/37280
2156 [37298]: https://github.com/rust-lang/rust/pull/37298
2157 [37306]: https://github.com/rust-lang/rust/pull/37306
2158 [37310]: https://github.com/rust-lang/rust/pull/37310
2159 [37312]: https://github.com/rust-lang/rust/pull/37312
2160 [37313]: https://github.com/rust-lang/rust/pull/37313
2161 [37315]: https://github.com/rust-lang/rust/pull/37315
2162 [37318]: https://github.com/rust-lang/rust/pull/37318
2163 [37322]: https://github.com/rust-lang/rust/pull/37322
2164 [37326]: https://github.com/rust-lang/rust/pull/37326
2165 [37351]: https://github.com/rust-lang/rust/pull/37351
2166 [37356]: https://github.com/rust-lang/rust/pull/37356
2167 [37367]: https://github.com/rust-lang/rust/pull/37367
2168 [37373]: https://github.com/rust-lang/rust/pull/37373
2169 [37378]: https://github.com/rust-lang/rust/pull/37378
2170 [37389]: https://github.com/rust-lang/rust/pull/37389
2171 [37392]: https://github.com/rust-lang/rust/pull/37392
2172 [37427]: https://github.com/rust-lang/rust/pull/37427
2173 [37439]: https://github.com/rust-lang/rust/pull/37439
2174 [37445]: https://github.com/rust-lang/rust/pull/37445
2175 [37470]: https://github.com/rust-lang/rust/pull/37470
2176 [37569]: https://github.com/rust-lang/rust/pull/37569
2177 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
2178 [cargo/3175]: https://github.com/rust-lang/cargo/pull/3175
2179 [cargo/3220]: https://github.com/rust-lang/cargo/pull/3220
2180 [cargo/3243]: https://github.com/rust-lang/cargo/pull/3243
2181 [cargo/3249]: https://github.com/rust-lang/cargo/pull/3249
2182 [cargo/3259]: https://github.com/rust-lang/cargo/pull/3259
2183 [cargo/3280]: https://github.com/rust-lang/cargo/pull/3280
2186 Version 1.13.0 (2016-11-10)
2187 ===========================
2192 * [Stabilize the `?` operator][36995]. `?` is a simple way to propagate
2193 errors, like the `try!` macro, described in [RFC 0243].
2194 * [Stabilize macros in type position][36014]. Described in [RFC 873].
2195 * [Stabilize attributes on statements][36995]. Described in [RFC 0016].
2196 * [Fix `#[derive]` for empty tuple structs/variants][35728]
2197 * [Fix lifetime rules for 'if' conditions][36029]
2198 * [Avoid loading and parsing unconfigured non-inline modules][36482]
2203 * [Add the `-C link-arg` argument][36574]
2204 * [Remove the old AST-based backend from rustc_trans][35764]
2205 * [Don't enable NEON by default on armv7 Linux][35814]
2206 * [Fix debug line number info for macro expansions][35238]
2207 * [Do not emit "class method" debuginfo for types that are not
2208 DICompositeType][36008]
2209 * [Warn about multiple conflicting #[repr] hints][34623]
2210 * [When sizing DST, don't double-count nested struct prefixes][36351]
2211 * [Default RUST_MIN_STACK to 16MiB for now][36505]
2212 * [Improve rlib metadata format][36551]. Reduces rlib size significantly.
2213 * [Reject macros with empty repetitions to avoid infinite loop][36721]
2214 * [Expand macros without recursing to avoid stack overflows][36214]
2219 * [Replace macro backtraces with labeled local uses][35702]
2220 * [Improve error message for misplaced doc comments][33922]
2221 * [Buffer unix and lock windows to prevent message interleaving][35975]
2222 * [Update lifetime errors to specifically note temporaries][36171]
2223 * [Special case a few colors for Windows][36178]
2224 * [Suggest `use self` when such an import resolves][36289]
2225 * [Be more specific when type parameter shadows primitive type][36338]
2226 * Many minor improvements
2228 Compile-time Optimizations
2229 --------------------------
2231 * [Compute and cache HIR hashes at beginning][35854]
2232 * [Don't hash types in loan paths][36004]
2233 * [Cache projections in trans][35761]
2234 * [Optimize the parser's last token handling][36527]
2235 * [Only instantiate #[inline] functions in codegen units referencing
2236 them][36524]. This leads to big improvements in cases where crates export
2237 define many inline functions without using them directly.
2238 * [Lazily allocate TypedArena's first chunk][36592]
2239 * [Don't allocate during default HashSet creation][36734]
2246 * [`overflowing_abs`]
2247 * [`RefCell::try_borrow`]
2248 * [`RefCell::try_borrow_mut`]
2253 * [Add `assert_ne!` and `debug_assert_ne!`][35074]
2254 * [Make `vec_deque::Drain`, `hash_map::Drain`, and `hash_set::Drain`
2256 * [Implement `AsRef<[T]>` for `std::slice::Iter`][35559]
2257 * [Implement `Debug` for `std::vec::IntoIter`][35707]
2258 * [`CString`: avoid excessive growth just to 0-terminate][35871]
2259 * [Implement `CoerceUnsized` for `{Cell, RefCell, UnsafeCell}`][35627]
2260 * [Use arc4rand on FreeBSD][35884]
2261 * [memrchr: Correct aligned offset computation][35969]
2262 * [Improve Demangling of Rust Symbols][36059]
2263 * [Use monotonic time in condition variables][35048]
2264 * [Implement `Debug` for `std::path::{Components,Iter}`][36101]
2265 * [Implement conversion traits for `char`][35755]
2266 * [Fix illegal instruction caused by overflow in channel cloning][36104]
2267 * [Zero first byte of CString on drop][36264]
2268 * [Inherit overflow checks for sum and product][36372]
2269 * [Add missing Eq implementations][36423]
2270 * [Implement `Debug` for `DirEntry`][36631]
2271 * [When `getaddrinfo` returns `EAI_SYSTEM` retrieve actual error from
2273 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
2274 * [Implement more traits for `std::io::ErrorKind`][35911]
2275 * [Optimize BinaryHeap bounds checking][36072]
2276 * [Work around pointer aliasing issue in `Vec::extend_from_slice`,
2277 `extend_with_element`][36355]
2278 * [Fix overflow checking in unsigned pow()][34942]
2283 * This release includes security fixes to both curl and OpenSSL.
2284 * [Fix transitive doctests when panic=abort][cargo/3021]
2285 * [Add --all-features flag to cargo][cargo/3038]
2286 * [Reject path-based dependencies in `cargo package`][cargo/3060]
2287 * [Don't parse the home directory more than once][cargo/3078]
2288 * [Don't try to generate Cargo.lock on empty workspaces][cargo/3092]
2289 * [Update OpenSSL to 1.0.2j][cargo/3121]
2290 * [Add license and license_file to cargo metadata output][cargo/3110]
2291 * [Make crates-io registry URL optional in config; ignore all changes to
2292 source.crates-io][cargo/3089]
2293 * [Don't download dependencies from other platforms][cargo/3123]
2294 * [Build transitive dev-dependencies when needed][cargo/3125]
2295 * [Add support for per-target rustflags in .cargo/config][cargo/3157]
2296 * [Avoid updating registry when adding existing deps][cargo/3144]
2297 * [Warn about path overrides that won't work][cargo/3136]
2298 * [Use workspaces during `cargo install`][cargo/3146]
2299 * [Leak mspdbsrv.exe processes on Windows][cargo/3162]
2300 * [Add --message-format flag][cargo/3000]
2301 * [Pass target environment for rustdoc][cargo/3205]
2302 * [Use `CommandExt::exec` for `cargo run` on Unix][cargo/2818]
2303 * [Update curl and curl-sys][cargo/3241]
2304 * [Call rustdoc test with the correct cfg flags of a package][cargo/3242]
2309 * [rustdoc: Add the `--sysroot` argument][36586]
2310 * [rustdoc: Fix a couple of issues with the search results][35655]
2311 * [rustdoc: remove the `!` from macro URLs and titles][35234]
2312 * [gdb: Fix pretty-printing special-cased Rust types][35585]
2313 * [rustdoc: Filter more incorrect methods inherited through Deref][36266]
2318 * [Remove unmaintained style guide][35124]
2319 * [Add s390x support][36369]
2320 * [Initial work at Haiku OS support][36727]
2321 * [Add mips-uclibc targets][35734]
2322 * [Crate-ify compiler-rt into compiler-builtins][35021]
2323 * [Add rustc version info (git hash + date) to dist tarball][36213]
2324 * Many documentation improvements
2329 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
2330 * [Deny (by default) transmuting from fn item types to pointer-sized
2331 types][34923]. Continuing the long transition to zero-sized fn items,
2333 * [Fix `#[derive]` for empty tuple structs/variants][35728].
2335 * [Issue deprecation warnings for safe accesses to extern statics][36173]
2336 * [Fix lifetime rules for 'if' conditions][36029].
2337 * [Inherit overflow checks for sum and product][36372].
2338 * [Forbid user-defined macros named "macro_rules"][36730].
2340 [33922]: https://github.com/rust-lang/rust/pull/33922
2341 [34623]: https://github.com/rust-lang/rust/pull/34623
2342 [34923]: https://github.com/rust-lang/rust/pull/34923
2343 [34942]: https://github.com/rust-lang/rust/pull/34942
2344 [34982]: https://github.com/rust-lang/rust/pull/34982
2345 [35021]: https://github.com/rust-lang/rust/pull/35021
2346 [35048]: https://github.com/rust-lang/rust/pull/35048
2347 [35074]: https://github.com/rust-lang/rust/pull/35074
2348 [35124]: https://github.com/rust-lang/rust/pull/35124
2349 [35234]: https://github.com/rust-lang/rust/pull/35234
2350 [35238]: https://github.com/rust-lang/rust/pull/35238
2351 [35354]: https://github.com/rust-lang/rust/pull/35354
2352 [35559]: https://github.com/rust-lang/rust/pull/35559
2353 [35585]: https://github.com/rust-lang/rust/pull/35585
2354 [35627]: https://github.com/rust-lang/rust/pull/35627
2355 [35655]: https://github.com/rust-lang/rust/pull/35655
2356 [35702]: https://github.com/rust-lang/rust/pull/35702
2357 [35707]: https://github.com/rust-lang/rust/pull/35707
2358 [35728]: https://github.com/rust-lang/rust/pull/35728
2359 [35734]: https://github.com/rust-lang/rust/pull/35734
2360 [35755]: https://github.com/rust-lang/rust/pull/35755
2361 [35761]: https://github.com/rust-lang/rust/pull/35761
2362 [35764]: https://github.com/rust-lang/rust/pull/35764
2363 [35814]: https://github.com/rust-lang/rust/pull/35814
2364 [35854]: https://github.com/rust-lang/rust/pull/35854
2365 [35871]: https://github.com/rust-lang/rust/pull/35871
2366 [35884]: https://github.com/rust-lang/rust/pull/35884
2367 [35911]: https://github.com/rust-lang/rust/pull/35911
2368 [35969]: https://github.com/rust-lang/rust/pull/35969
2369 [35975]: https://github.com/rust-lang/rust/pull/35975
2370 [36004]: https://github.com/rust-lang/rust/pull/36004
2371 [36008]: https://github.com/rust-lang/rust/pull/36008
2372 [36014]: https://github.com/rust-lang/rust/pull/36014
2373 [36029]: https://github.com/rust-lang/rust/pull/36029
2374 [36059]: https://github.com/rust-lang/rust/pull/36059
2375 [36072]: https://github.com/rust-lang/rust/pull/36072
2376 [36101]: https://github.com/rust-lang/rust/pull/36101
2377 [36104]: https://github.com/rust-lang/rust/pull/36104
2378 [36171]: https://github.com/rust-lang/rust/pull/36171
2379 [36173]: https://github.com/rust-lang/rust/pull/36173
2380 [36178]: https://github.com/rust-lang/rust/pull/36178
2381 [36213]: https://github.com/rust-lang/rust/pull/36213
2382 [36214]: https://github.com/rust-lang/rust/pull/36214
2383 [36264]: https://github.com/rust-lang/rust/pull/36264
2384 [36266]: https://github.com/rust-lang/rust/pull/36266
2385 [36289]: https://github.com/rust-lang/rust/pull/36289
2386 [36338]: https://github.com/rust-lang/rust/pull/36338
2387 [36351]: https://github.com/rust-lang/rust/pull/36351
2388 [36355]: https://github.com/rust-lang/rust/pull/36355
2389 [36369]: https://github.com/rust-lang/rust/pull/36369
2390 [36372]: https://github.com/rust-lang/rust/pull/36372
2391 [36423]: https://github.com/rust-lang/rust/pull/36423
2392 [36482]: https://github.com/rust-lang/rust/pull/36482
2393 [36505]: https://github.com/rust-lang/rust/pull/36505
2394 [36524]: https://github.com/rust-lang/rust/pull/36524
2395 [36527]: https://github.com/rust-lang/rust/pull/36527
2396 [36551]: https://github.com/rust-lang/rust/pull/36551
2397 [36574]: https://github.com/rust-lang/rust/pull/36574
2398 [36586]: https://github.com/rust-lang/rust/pull/36586
2399 [36592]: https://github.com/rust-lang/rust/pull/36592
2400 [36631]: https://github.com/rust-lang/rust/pull/36631
2401 [36639]: https://github.com/rust-lang/rust/pull/36639
2402 [36721]: https://github.com/rust-lang/rust/pull/36721
2403 [36727]: https://github.com/rust-lang/rust/pull/36727
2404 [36730]: https://github.com/rust-lang/rust/pull/36730
2405 [36734]: https://github.com/rust-lang/rust/pull/36734
2406 [36754]: https://github.com/rust-lang/rust/pull/36754
2407 [36995]: https://github.com/rust-lang/rust/pull/36995
2408 [RFC 0016]: https://github.com/rust-lang/rfcs/blob/master/text/0016-more-attributes.md
2409 [RFC 0243]: https://github.com/rust-lang/rfcs/blob/master/text/0243-trait-based-exception-handling.md
2410 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
2411 [RFC 401]: https://github.com/rust-lang/rfcs/blob/master/text/0401-coercions.md
2412 [RFC 873]: https://github.com/rust-lang/rfcs/blob/master/text/0873-type-macros.md
2413 [cargo/2818]: https://github.com/rust-lang/cargo/pull/2818
2414 [cargo/3000]: https://github.com/rust-lang/cargo/pull/3000
2415 [cargo/3021]: https://github.com/rust-lang/cargo/pull/3021
2416 [cargo/3038]: https://github.com/rust-lang/cargo/pull/3038
2417 [cargo/3060]: https://github.com/rust-lang/cargo/pull/3060
2418 [cargo/3078]: https://github.com/rust-lang/cargo/pull/3078
2419 [cargo/3089]: https://github.com/rust-lang/cargo/pull/3089
2420 [cargo/3092]: https://github.com/rust-lang/cargo/pull/3092
2421 [cargo/3110]: https://github.com/rust-lang/cargo/pull/3110
2422 [cargo/3121]: https://github.com/rust-lang/cargo/pull/3121
2423 [cargo/3123]: https://github.com/rust-lang/cargo/pull/3123
2424 [cargo/3125]: https://github.com/rust-lang/cargo/pull/3125
2425 [cargo/3136]: https://github.com/rust-lang/cargo/pull/3136
2426 [cargo/3144]: https://github.com/rust-lang/cargo/pull/3144
2427 [cargo/3146]: https://github.com/rust-lang/cargo/pull/3146
2428 [cargo/3157]: https://github.com/rust-lang/cargo/pull/3157
2429 [cargo/3162]: https://github.com/rust-lang/cargo/pull/3162
2430 [cargo/3205]: https://github.com/rust-lang/cargo/pull/3205
2431 [cargo/3241]: https://github.com/rust-lang/cargo/pull/3241
2432 [cargo/3242]: https://github.com/rust-lang/cargo/pull/3242
2433 [rustup]: https://www.rustup.rs
2434 [`checked_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.checked_abs
2435 [`wrapping_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.wrapping_abs
2436 [`overflowing_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.overflowing_abs
2437 [`RefCell::try_borrow`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow
2438 [`RefCell::try_borrow_mut`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow_mut
2439 [`SipHasher`]: https://doc.rust-lang.org/std/hash/struct.SipHasher.html
2440 [`DefaultHasher`]: https://doc.rust-lang.org/std/collections/hash_map/struct.DefaultHasher.html
2443 Version 1.12.1 (2016-10-20)
2444 ===========================
2449 * [ICE: 'rustc' panicked at 'assertion failed: concrete_substs.is_normalized_for_trans()' #36381][36381]
2450 * [Confusion with double negation and booleans][36856]
2451 * [rustc 1.12.0 fails with SIGSEGV in release mode (syn crate 0.8.0)][36875]
2452 * [Rustc 1.12.0 Windows build of `ethcore` crate fails with LLVM error][36924]
2453 * [1.12.0: High memory usage when linking in release mode with debug info][36926]
2454 * [Corrupted memory after updated to 1.12][36936]
2455 * ["Let NullaryConstructor = something;" causes internal compiler error: "tried to overwrite interned AdtDef"][37026]
2456 * [Fix ICE: inject bitcast if types mismatch for invokes/calls/stores][37112]
2457 * [debuginfo: Handle spread_arg case in MIR-trans in a more stable way.][37153]
2459 [36381]: https://github.com/rust-lang/rust/issues/36381
2460 [36856]: https://github.com/rust-lang/rust/issues/36856
2461 [36875]: https://github.com/rust-lang/rust/issues/36875
2462 [36924]: https://github.com/rust-lang/rust/issues/36924
2463 [36926]: https://github.com/rust-lang/rust/issues/36926
2464 [36936]: https://github.com/rust-lang/rust/issues/36936
2465 [37026]: https://github.com/rust-lang/rust/issues/37026
2466 [37112]: https://github.com/rust-lang/rust/issues/37112
2467 [37153]: https://github.com/rust-lang/rust/issues/37153
2470 Version 1.12.0 (2016-09-29)
2471 ===========================
2476 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)](https://github.com/rust-lang/rust/pull/34096).
2477 This translation pass is far simpler than the previous AST->LLVM pass, and
2478 creates opportunities to perform new optimizations directly on the MIR. It
2479 was previously described [on the Rust blog](https://blog.rust-lang.org/2016/04/19/MIR.html).
2480 * [`rustc` presents a new, more readable error format, along with
2481 machine-readable JSON error output for use by IDEs](https://github.com/rust-lang/rust/pull/35401).
2482 Most common editors supporting Rust have been updated to work with it. It was
2483 previously described [on the Rust blog](https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
2488 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)](https://github.com/rust-lang/rust/pull/34096).
2489 This translation pass is far simpler than the previous AST->LLVM pass, and
2490 creates opportunities to perform new optimizations directly on the MIR. It
2491 was previously described [on the Rust blog](https://blog.rust-lang.org/2016/04/19/MIR.html).
2492 * [Print the Rust target name, not the LLVM target name, with
2493 `--print target-list`](https://github.com/rust-lang/rust/pull/35489)
2494 * [The computation of `TypeId` is correct in some cases where it was previously
2495 producing inconsistent results](https://github.com/rust-lang/rust/pull/35267)
2496 * [The `mips-unknown-linux-gnu` target uses hardware floating point by default](https://github.com/rust-lang/rust/pull/34910)
2497 * [The `rustc` arguments, `--print target-cpus`, `--print target-features`,
2498 `--print relocation-models`, and `--print code-models` print the available
2499 options to the `-C target-cpu`, `-C target-feature`, `-C relocation-model` and
2500 `-C code-model` code generation arguments](https://github.com/rust-lang/rust/pull/34845)
2501 * [`rustc` supports three new MUSL targets on ARM: `arm-unknown-linux-musleabi`,
2502 `arm-unknown-linux-musleabihf`, and `armv7-unknown-linux-musleabihf`](https://github.com/rust-lang/rust/pull/35060).
2503 These targets produce statically-linked binaries. There are no binary release
2509 * [`rustc` presents a new, more readable error format, along with
2510 machine-readable JSON error output for use by IDEs](https://github.com/rust-lang/rust/pull/35401).
2511 Most common editors supporting Rust have been updated to work with it. It was
2512 previously described [on the Rust blog](https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
2513 * [In error descriptions, references are now described in plain English,
2514 instead of as "&-ptr"](https://github.com/rust-lang/rust/pull/35611)
2515 * [In error type descriptions, unknown numeric types are named `{integer}` or
2516 `{float}` instead of `_`](https://github.com/rust-lang/rust/pull/35080)
2517 * [`rustc` emits a clearer error when inner attributes follow a doc comment](https://github.com/rust-lang/rust/pull/34676)
2522 * [`macro_rules!` invocations can be made within `macro_rules!` invocations](https://github.com/rust-lang/rust/pull/34925)
2523 * [`macro_rules!` meta-variables are hygienic](https://github.com/rust-lang/rust/pull/35453)
2524 * [`macro_rules!` `tt` matchers can be reparsed correctly, making them much more
2525 useful](https://github.com/rust-lang/rust/pull/34908)
2526 * [`macro_rules!` `stmt` matchers correctly consume the entire contents when
2527 inside non-braces invocations](https://github.com/rust-lang/rust/pull/34886)
2528 * [Semicolons are properly required as statement delimiters inside
2529 `macro_rules!` invocations](https://github.com/rust-lang/rust/pull/34660)
2530 * [`cfg_attr` works on `path` attributes](https://github.com/rust-lang/rust/pull/34546)
2535 * [`Cell::as_ptr`](https://doc.rust-lang.org/std/cell/struct.Cell.html#method.as_ptr)
2536 * [`RefCell::as_ptr`](https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.as_ptr)
2537 * [`IpAddr::is_unspecified`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_unspecified)
2538 * [`IpAddr::is_loopback`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_loopback)
2539 * [`IpAddr::is_multicast`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_multicast)
2540 * [`Ipv4Addr::is_unspecified`](https://doc.rust-lang.org/std/net/struct.Ipv4Addr.html#method.is_unspecified)
2541 * [`Ipv6Addr::octets`](https://doc.rust-lang.org/std/net/struct.Ipv6Addr.html#method.octets)
2542 * [`LinkedList::contains`](https://doc.rust-lang.org/std/collections/linked_list/struct.LinkedList.html#method.contains)
2543 * [`VecDeque::contains`](https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.contains)
2544 * [`ExitStatusExt::from_raw`](https://doc.rust-lang.org/std/os/unix/process/trait.ExitStatusExt.html#tymethod.from_raw).
2545 Both on Unix and Windows.
2546 * [`Receiver::recv_timeout`](https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.recv_timeout)
2547 * [`RecvTimeoutError`](https://doc.rust-lang.org/std/sync/mpsc/enum.RecvTimeoutError.html)
2548 * [`BinaryHeap::peek_mut`](https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.peek_mut)
2549 * [`PeekMut`](https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html)
2550 * [`iter::Product`](https://doc.rust-lang.org/std/iter/trait.Product.html)
2551 * [`iter::Sum`](https://doc.rust-lang.org/std/iter/trait.Sum.html)
2552 * [`OccupiedEntry::remove_entry`](https://doc.rust-lang.org/std/collections/btree_map/struct.OccupiedEntry.html#method.remove_entry)
2553 * [`VacantEntry::into_key`](https://doc.rust-lang.org/std/collections/btree_map/struct.VacantEntry.html#method.into_key)
2558 * [The `format!` macro and friends now allow a single argument to be formatted
2559 in multiple styles](https://github.com/rust-lang/rust/pull/33642)
2560 * [The lifetime bounds on `[T]::binary_search_by` and
2561 `[T]::binary_search_by_key` have been adjusted to be more flexible](https://github.com/rust-lang/rust/pull/34762)
2562 * [`Option` implements `From` for its contained type](https://github.com/rust-lang/rust/pull/34828)
2563 * [`Cell`, `RefCell` and `UnsafeCell` implement `From` for their contained type](https://github.com/rust-lang/rust/pull/35392)
2564 * [`RwLock` panics if the reader count overflows](https://github.com/rust-lang/rust/pull/35378)
2565 * [`vec_deque::Drain`, `hash_map::Drain` and `hash_set::Drain` are covariant](https://github.com/rust-lang/rust/pull/35354)
2566 * [`vec::Drain` and `binary_heap::Drain` are covariant](https://github.com/rust-lang/rust/pull/34951)
2567 * [`Cow<str>` implements `FromIterator` for `char`, `&str` and `String`](https://github.com/rust-lang/rust/pull/35064)
2568 * [Sockets on Linux are correctly closed in subprocesses via `SOCK_CLOEXEC`](https://github.com/rust-lang/rust/pull/34946)
2569 * [`hash_map::Entry`, `hash_map::VacantEntry` and `hash_map::OccupiedEntry`
2570 implement `Debug`](https://github.com/rust-lang/rust/pull/34937)
2571 * [`btree_map::Entry`, `btree_map::VacantEntry` and `btree_map::OccupiedEntry`
2572 implement `Debug`](https://github.com/rust-lang/rust/pull/34885)
2573 * [`String` implements `AddAssign`](https://github.com/rust-lang/rust/pull/34890)
2574 * [Variadic `extern fn` pointers implement the `Clone`, `PartialEq`, `Eq`,
2575 `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and `fmt::Debug` traits](https://github.com/rust-lang/rust/pull/34879)
2576 * [`FileType` implements `Debug`](https://github.com/rust-lang/rust/pull/34757)
2577 * [References to `Mutex` and `RwLock` are unwind-safe](https://github.com/rust-lang/rust/pull/34756)
2578 * [`mpsc::sync_channel` `Receiver`s return any available message before
2579 reporting a disconnect](https://github.com/rust-lang/rust/pull/34731)
2580 * [Unicode definitions have been updated to 9.0](https://github.com/rust-lang/rust/pull/34599)
2581 * [`env` iterators implement `DoubleEndedIterator`](https://github.com/rust-lang/rust/pull/33312)
2586 * [Support local mirrors of registries](https://github.com/rust-lang/cargo/pull/2857)
2587 * [Add support for command aliases](https://github.com/rust-lang/cargo/pull/2679)
2588 * [Allow `opt-level="s"` / `opt-level="z"` in profile overrides](https://github.com/rust-lang/cargo/pull/3007)
2589 * [Make `cargo doc --open --target` work as expected](https://github.com/rust-lang/cargo/pull/2988)
2590 * [Speed up noop registry updates](https://github.com/rust-lang/cargo/pull/2974)
2591 * [Update OpenSSL](https://github.com/rust-lang/cargo/pull/2971)
2592 * [Fix `--panic=abort` with plugins](https://github.com/rust-lang/cargo/pull/2954)
2593 * [Always pass `-C metadata` to the compiler](https://github.com/rust-lang/cargo/pull/2946)
2594 * [Fix depending on git repos with workspaces](https://github.com/rust-lang/cargo/pull/2938)
2595 * [Add a `--lib` flag to `cargo new`](https://github.com/rust-lang/cargo/pull/2921)
2596 * [Add `http.cainfo` for custom certs](https://github.com/rust-lang/cargo/pull/2917)
2597 * [Indicate the compilation profile after compiling](https://github.com/rust-lang/cargo/pull/2909)
2598 * [Allow enabling features for dependencies with `--features`](https://github.com/rust-lang/cargo/pull/2876)
2599 * [Add `--jobs` flag to `cargo package`](https://github.com/rust-lang/cargo/pull/2867)
2600 * [Add `--dry-run` to `cargo publish`](https://github.com/rust-lang/cargo/pull/2849)
2601 * [Add support for `RUSTDOCFLAGS`](https://github.com/rust-lang/cargo/pull/2794)
2606 * [`panic::catch_unwind` is more optimized](https://github.com/rust-lang/rust/pull/35444)
2607 * [`panic::catch_unwind` no longer accesses thread-local storage on entry](https://github.com/rust-lang/rust/pull/34866)
2612 * [Test binaries now support a `--test-threads` argument to specify the number
2613 of threads used to run tests, and which acts the same as the
2614 `RUST_TEST_THREADS` environment variable](https://github.com/rust-lang/rust/pull/35414)
2615 * [The test runner now emits a warning when tests run over 60 seconds](https://github.com/rust-lang/rust/pull/35405)
2616 * [rustdoc: Fix methods in search results](https://github.com/rust-lang/rust/pull/34752)
2617 * [`rust-lldb` warns about unsupported versions of LLDB](https://github.com/rust-lang/rust/pull/34646)
2618 * [Rust releases now come with source packages that can be installed by rustup
2619 via `rustup component add rust-src`](https://github.com/rust-lang/rust/pull/34366).
2620 The resulting source code can be used by tools and IDES, located in the
2621 sysroot under `lib/rustlib/src`.
2626 * [The compiler can now be built against LLVM 3.9](https://github.com/rust-lang/rust/pull/35594)
2627 * Many minor improvements to the documentation.
2628 * [The Rust exception handling "personality" routine is now written in Rust](https://github.com/rust-lang/rust/pull/34832)
2633 * [When printing Windows `OsStr`s, unpaired surrogate codepoints are escaped
2634 with the lowercase format instead of the uppercase](https://github.com/rust-lang/rust/pull/35084)
2635 * [When formatting strings, if "precision" is specified, the "fill",
2636 "align" and "width" specifiers are no longer ignored](https://github.com/rust-lang/rust/pull/34544)
2637 * [The `Debug` impl for strings no longer escapes all non-ASCII characters](https://github.com/rust-lang/rust/pull/34485)
2640 Version 1.11.0 (2016-08-18)
2641 ===========================
2646 * [`cfg_attr` works on `path` attributes](https://github.com/rust-lang/rust/pull/34546)
2647 * [Support nested `cfg_attr` attributes](https://github.com/rust-lang/rust/pull/34216)
2648 * [Allow statement-generating braced macro invocations at the end of blocks](https://github.com/rust-lang/rust/pull/34436)
2649 * [Macros can be expanded inside of trait definitions](https://github.com/rust-lang/rust/pull/34213)
2650 * [`#[macro_use]` works properly when it is itself expanded from a macro](https://github.com/rust-lang/rust/pull/34032)
2655 * [`BinaryHeap::append`](https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.append)
2656 * [`BTreeMap::append`](https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.append)
2657 * [`BTreeMap::split_off`](https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.split_off)
2658 * [`BTreeSet::append`](https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.append)
2659 * [`BTreeSet::split_off`](https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.split_off)
2660 * [`f32::to_degrees`](https://doc.rust-lang.org/std/primitive.f32.html#method.to_degrees)
2661 (in libcore - previously stabilized in libstd)
2662 * [`f32::to_radians`](https://doc.rust-lang.org/std/primitive.f32.html#method.to_radians)
2663 (in libcore - previously stabilized in libstd)
2664 * [`f64::to_degrees`](https://doc.rust-lang.org/std/primitive.f64.html#method.to_degrees)
2665 (in libcore - previously stabilized in libstd)
2666 * [`f64::to_radians`](https://doc.rust-lang.org/std/primitive.f64.html#method.to_radians)
2667 (in libcore - previously stabilized in libstd)
2668 * [`Iterator::sum`](https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
2669 * [`Iterator::product`](https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
2670 * [`Cell::get_mut`](https://doc.rust-lang.org/std/cell/struct.Cell.html#method.get_mut)
2671 * [`RefCell::get_mut`](https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.get_mut)
2676 * [The `thread_local!` macro supports multiple definitions in a single
2677 invocation, and can apply attributes](https://github.com/rust-lang/rust/pull/34077)
2678 * [`Cow` implements `Default`](https://github.com/rust-lang/rust/pull/34305)
2679 * [`Wrapping` implements binary, octal, lower-hex and upper-hex
2680 `Display` formatting](https://github.com/rust-lang/rust/pull/34190)
2681 * [The range types implement `Hash`](https://github.com/rust-lang/rust/pull/34180)
2682 * [`lookup_host` ignores unknown address types](https://github.com/rust-lang/rust/pull/34067)
2683 * [`assert_eq!` accepts a custom error message, like `assert!` does](https://github.com/rust-lang/rust/pull/33976)
2684 * [The main thread is now called "main" instead of "<main>"](https://github.com/rust-lang/rust/pull/33803)
2689 * [Disallow specifying features of transitive deps](https://github.com/rust-lang/cargo/pull/2821)
2690 * [Add color support for Windows consoles](https://github.com/rust-lang/cargo/pull/2804)
2691 * [Fix `harness = false` on `[lib]` sections](https://github.com/rust-lang/cargo/pull/2795)
2692 * [Don't panic when `links` contains a '.'](https://github.com/rust-lang/cargo/pull/2787)
2693 * [Build scripts can emit warnings](https://github.com/rust-lang/cargo/pull/2630),
2694 and `-vv` prints warnings for all crates.
2695 * [Ignore file locks on OS X NFS mounts](https://github.com/rust-lang/cargo/pull/2720)
2696 * [Don't warn about `package.metadata` keys](https://github.com/rust-lang/cargo/pull/2668).
2697 This provides room for expansion by arbitrary tools.
2698 * [Add support for cdylib crate types](https://github.com/rust-lang/cargo/pull/2741)
2699 * [Prevent publishing crates when files are dirty](https://github.com/rust-lang/cargo/pull/2781)
2700 * [Don't fetch all crates on clean](https://github.com/rust-lang/cargo/pull/2704)
2701 * [Propagate --color option to rustc](https://github.com/rust-lang/cargo/pull/2779)
2702 * [Fix `cargo doc --open` on Windows](https://github.com/rust-lang/cargo/pull/2780)
2703 * [Improve autocompletion](https://github.com/rust-lang/cargo/pull/2772)
2704 * [Configure colors of stderr as well as stdout](https://github.com/rust-lang/cargo/pull/2739)
2709 * [Caching projections speeds up type check dramatically for some
2710 workloads](https://github.com/rust-lang/rust/pull/33816)
2711 * [The default `HashMap` hasher is SipHash 1-3 instead of SipHash 2-4](https://github.com/rust-lang/rust/pull/33940)
2712 This hasher is faster, but is believed to provide sufficient
2713 protection from collision attacks.
2714 * [Comparison of `Ipv4Addr` is 10x faster](https://github.com/rust-lang/rust/pull/33891)
2719 * [Fix empty implementation section on some module pages](https://github.com/rust-lang/rust/pull/34536)
2720 * [Fix inlined renamed re-exports in import lists](https://github.com/rust-lang/rust/pull/34479)
2721 * [Fix search result layout for enum variants and struct fields](https://github.com/rust-lang/rust/pull/34477)
2722 * [Fix issues with source links to external crates](https://github.com/rust-lang/rust/pull/34387)
2723 * [Fix redirect pages for renamed re-exports](https://github.com/rust-lang/rust/pull/34245)
2728 * [rustc is better at finding the MSVC toolchain](https://github.com/rust-lang/rust/pull/34492)
2729 * [When emitting debug info, rustc emits frame pointers for closures,
2730 shims and glue, as it does for all other functions](https://github.com/rust-lang/rust/pull/33909)
2731 * [rust-lldb warns about unsupported versions of LLDB](https://github.com/rust-lang/rust/pull/34646)
2732 * Many more errors have been given error codes and extended
2734 * API documentation continues to be improved, with many new examples
2739 * [rustc no longer hangs when dependencies recursively re-export
2740 submodules](https://github.com/rust-lang/rust/pull/34542)
2741 * [rustc requires LLVM 3.7+](https://github.com/rust-lang/rust/pull/34104)
2742 * [The 'How Safe and Unsafe Interact' chapter of The Rustonomicon was
2743 rewritten](https://github.com/rust-lang/rust/pull/33895)
2744 * [rustc support 16-bit pointer sizes](https://github.com/rust-lang/rust/pull/33460).
2745 No targets use this yet, but it works toward AVR support.
2750 * [`const`s and `static`s may not have unsized types](https://github.com/rust-lang/rust/pull/34443)
2751 * [The new follow-set rules that place restrictions on `macro_rules!`
2752 in order to ensure syntax forward-compatibility have been enabled](https://github.com/rust-lang/rust/pull/33982)
2753 This was an [amendment to RFC 550](https://github.com/rust-lang/rfcs/pull/1384),
2754 and has been a warning since 1.10.
2755 * [`cfg` attribute process has been refactored to fix various bugs](https://github.com/rust-lang/rust/pull/33706).
2756 This causes breakage in some corner cases.
2759 Version 1.10.0 (2016-07-07)
2760 ===========================
2765 * [Allow `concat_idents!` in type positions as well as in expression
2766 positions](https://github.com/rust-lang/rust/pull/33735).
2767 * [`Copy` types are required to have a trivial implementation of `Clone`](https://github.com/rust-lang/rust/pull/33420).
2768 [RFC 1521](https://github.com/rust-lang/rfcs/blob/master/text/1521-copy-clone-semantics.md).
2769 * [Single-variant enums support the `#[repr(..)]` attribute](https://github.com/rust-lang/rust/pull/33355).
2770 * [Fix `#[derive(RustcEncodable)]` in the presence of other `encode` methods](https://github.com/rust-lang/rust/pull/32908).
2771 * [`panic!` can be converted to a runtime abort with the
2772 `-C panic=abort` flag](https://github.com/rust-lang/rust/pull/32900).
2773 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
2774 * [Add a new crate type, 'cdylib'](https://github.com/rust-lang/rust/pull/33553).
2775 cdylibs are dynamic libraries suitable for loading by non-Rust hosts.
2776 [RFC 1510](https://github.com/rust-lang/rfcs/blob/master/text/1510-rdylib.md).
2777 Note that Cargo does not yet directly support cdylibs.
2782 * `os::windows::fs::OpenOptionsExt::access_mode`
2783 * `os::windows::fs::OpenOptionsExt::share_mode`
2784 * `os::windows::fs::OpenOptionsExt::custom_flags`
2785 * `os::windows::fs::OpenOptionsExt::attributes`
2786 * `os::windows::fs::OpenOptionsExt::security_qos_flags`
2787 * `os::unix::fs::OpenOptionsExt::custom_flags`
2788 * [`sync::Weak::new`](http://doc.rust-lang.org/alloc/arc/struct.Weak.html#method.new)
2789 * `Default for sync::Weak`
2790 * [`panic::set_hook`](http://doc.rust-lang.org/std/panic/fn.set_hook.html)
2791 * [`panic::take_hook`](http://doc.rust-lang.org/std/panic/fn.take_hook.html)
2792 * [`panic::PanicInfo`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html)
2793 * [`panic::PanicInfo::payload`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.payload)
2794 * [`panic::PanicInfo::location`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.location)
2795 * [`panic::Location`](http://doc.rust-lang.org/std/panic/struct.Location.html)
2796 * [`panic::Location::file`](http://doc.rust-lang.org/std/panic/struct.Location.html#method.file)
2797 * [`panic::Location::line`](http://doc.rust-lang.org/std/panic/struct.Location.html#method.line)
2798 * [`ffi::CStr::from_bytes_with_nul`](http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul)
2799 * [`ffi::CStr::from_bytes_with_nul_unchecked`](http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul_unchecked)
2800 * [`ffi::FromBytesWithNulError`](http://doc.rust-lang.org/std/ffi/struct.FromBytesWithNulError.html)
2801 * [`fs::Metadata::modified`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.modified)
2802 * [`fs::Metadata::accessed`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.accessed)
2803 * [`fs::Metadata::created`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.created)
2804 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange`
2805 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange_weak`
2806 * `collections::{btree,hash}_map::{Occupied,Vacant,}Entry::key`
2807 * `os::unix::net::{UnixStream, UnixListener, UnixDatagram, SocketAddr}`
2808 * [`SocketAddr::is_unnamed`](http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.is_unnamed)
2809 * [`SocketAddr::as_pathname`](http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.as_pathname)
2810 * [`UnixStream::connect`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.connect)
2811 * [`UnixStream::pair`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.pair)
2812 * [`UnixStream::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.try_clone)
2813 * [`UnixStream::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.local_addr)
2814 * [`UnixStream::peer_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.peer_addr)
2815 * [`UnixStream::set_read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
2816 * [`UnixStream::set_write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
2817 * [`UnixStream::read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
2818 * [`UnixStream::write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
2819 * [`UnixStream::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.set_nonblocking)
2820 * [`UnixStream::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.take_error)
2821 * [`UnixStream::shutdown`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.shutdown)
2822 * Read/Write/RawFd impls for `UnixStream`
2823 * [`UnixListener::bind`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.bind)
2824 * [`UnixListener::accept`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.accept)
2825 * [`UnixListener::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.try_clone)
2826 * [`UnixListener::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.local_addr)
2827 * [`UnixListener::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.set_nonblocking)
2828 * [`UnixListener::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.take_error)
2829 * [`UnixListener::incoming`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.incoming)
2830 * RawFd impls for `UnixListener`
2831 * [`UnixDatagram::bind`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.bind)
2832 * [`UnixDatagram::unbound`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.unbound)
2833 * [`UnixDatagram::pair`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.pair)
2834 * [`UnixDatagram::connect`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.connect)
2835 * [`UnixDatagram::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.try_clone)
2836 * [`UnixDatagram::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.local_addr)
2837 * [`UnixDatagram::peer_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.peer_addr)
2838 * [`UnixDatagram::recv_from`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv_from)
2839 * [`UnixDatagram::recv`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv)
2840 * [`UnixDatagram::send_to`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send_to)
2841 * [`UnixDatagram::send`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send)
2842 * [`UnixDatagram::set_read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_read_timeout)
2843 * [`UnixDatagram::set_write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_write_timeout)
2844 * [`UnixDatagram::read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.read_timeout)
2845 * [`UnixDatagram::write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.write_timeout)
2846 * [`UnixDatagram::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_nonblocking)
2847 * [`UnixDatagram::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.take_error)
2848 * [`UnixDatagram::shutdown`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.shutdown)
2849 * RawFd impls for `UnixDatagram`
2850 * `{BTree,Hash}Map::values_mut`
2851 * [`<[_]>::binary_search_by_key`](http://doc.rust-lang.org/beta/std/primitive.slice.html#method.binary_search_by_key)
2856 * [The `abs_sub` method of floats is deprecated](https://github.com/rust-lang/rust/pull/33664).
2857 The semantics of this minor method are subtle and probably not what
2859 * [Add implementation of Ord for Cell<T> and RefCell<T> where T: Ord](https://github.com/rust-lang/rust/pull/33306).
2860 * [On Linux, if `HashMap`s can't be initialized with `getrandom` they
2861 will fall back to `/dev/urandom` temporarily to avoid blocking
2862 during early boot](https://github.com/rust-lang/rust/pull/33086).
2863 * [Implemented negation for wrapping numerals](https://github.com/rust-lang/rust/pull/33067).
2864 * [Implement `Clone` for `binary_heap::IntoIter`](https://github.com/rust-lang/rust/pull/33050).
2865 * [Implement `Display` and `Hash` for `std::num::Wrapping`](https://github.com/rust-lang/rust/pull/33023).
2866 * [Add `Default` implementation for `&CStr`, `CString`](https://github.com/rust-lang/rust/pull/32990).
2867 * [Implement `From<Vec<T>>` and `Into<Vec<T>>` for `VecDeque<T>`](https://github.com/rust-lang/rust/pull/32866).
2868 * [Implement `Default` for `UnsafeCell`, `fmt::Error`, `Condvar`,
2869 `Mutex`, `RwLock`](https://github.com/rust-lang/rust/pull/32785).
2873 * [Cargo.toml supports the `profile.*.panic` option](https://github.com/rust-lang/cargo/pull/2687).
2874 This controls the runtime behavior of the `panic!` macro
2875 and can be either "unwind" (the default), or "abort".
2876 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
2877 * [Don't throw away errors with `-p` arguments](https://github.com/rust-lang/cargo/pull/2723).
2878 * [Report status to stderr instead of stdout](https://github.com/rust-lang/cargo/pull/2693).
2879 * [Build scripts are passed a `CARGO_MANIFEST_LINKS` environment
2880 variable that corresponds to the `links` field of the manifest](https://github.com/rust-lang/cargo/pull/2710).
2881 * [Ban keywords from crate names](https://github.com/rust-lang/cargo/pull/2707).
2882 * [Canonicalize `CARGO_HOME` on Windows](https://github.com/rust-lang/cargo/pull/2604).
2883 * [Retry network requests](https://github.com/rust-lang/cargo/pull/2396).
2884 By default they are retried twice, which can be customized with the
2885 `net.retry` value in `.cargo/config`.
2886 * [Don't print extra error info for failing subcommands](https://github.com/rust-lang/cargo/pull/2674).
2887 * [Add `--force` flag to `cargo install`](https://github.com/rust-lang/cargo/pull/2405).
2888 * [Don't use `flock` on NFS mounts](https://github.com/rust-lang/cargo/pull/2623).
2889 * [Prefer building `cargo install` artifacts in temporary directories](https://github.com/rust-lang/cargo/pull/2610).
2890 Makes it possible to install multiple crates in parallel.
2891 * [Add `cargo test --doc`](https://github.com/rust-lang/cargo/pull/2578).
2892 * [Add `cargo --explain`](https://github.com/rust-lang/cargo/pull/2551).
2893 * [Don't print warnings when `-q` is passed](https://github.com/rust-lang/cargo/pull/2576).
2894 * [Add `cargo doc --lib` and `--bin`](https://github.com/rust-lang/cargo/pull/2577).
2895 * [Don't require build script output to be UTF-8](https://github.com/rust-lang/cargo/pull/2560).
2896 * [Correctly attempt multiple git usernames](https://github.com/rust-lang/cargo/pull/2584).
2901 * [rustc memory usage was reduced by refactoring the context used for
2902 type checking](https://github.com/rust-lang/rust/pull/33425).
2903 * [Speed up creation of `HashMap`s by caching the random keys used
2904 to initialize the hash state](https://github.com/rust-lang/rust/pull/33318).
2905 * [The `find` implementation for `Chain` iterators is 2x faster](https://github.com/rust-lang/rust/pull/33289).
2906 * [Trait selection optimizations speed up type checking by 15%](https://github.com/rust-lang/rust/pull/33138).
2907 * [Efficient trie lookup for boolean Unicode properties](https://github.com/rust-lang/rust/pull/33098).
2908 10x faster than the previous lookup tables.
2909 * [Special case `#[derive(Copy, Clone)]` to avoid bloat](https://github.com/rust-lang/rust/pull/31414).
2914 * Many incremental improvements to documentation and rustdoc.
2915 * [rustdoc: List blanket trait impls](https://github.com/rust-lang/rust/pull/33514).
2916 * [rustdoc: Clean up ABI rendering](https://github.com/rust-lang/rust/pull/33151).
2917 * [Indexing with the wrong type produces a more informative error](https://github.com/rust-lang/rust/pull/33401).
2918 * [Improve diagnostics for constants being used in irrefutable patterns](https://github.com/rust-lang/rust/pull/33406).
2919 * [When many method candidates are in scope limit the suggestions to 10](https://github.com/rust-lang/rust/pull/33338).
2920 * [Remove confusing suggestion when calling a `fn` type](https://github.com/rust-lang/rust/pull/33325).
2921 * [Do not suggest changing `&mut self` to `&mut mut self`](https://github.com/rust-lang/rust/pull/33319).
2926 * [Update i686-linux-android features to match Android ABI](https://github.com/rust-lang/rust/pull/33651).
2927 * [Update aarch64-linux-android features to match Android ABI](https://github.com/rust-lang/rust/pull/33500).
2928 * [`std` no longer prints backtraces on platforms where the running
2929 module must be loaded with `env::current_exe`, which can't be relied
2930 on](https://github.com/rust-lang/rust/pull/33554).
2931 * This release includes std binaries for the i586-unknown-linux-gnu,
2932 i686-unknown-linux-musl, and armv7-linux-androideabi targets. The
2933 i586 target is for old x86 hardware without SSE2, and the armv7
2934 target is for Android running on modern ARM architectures.
2935 * [The `rust-gdb` and `rust-lldb` scripts are distributed on all
2936 Unix platforms](https://github.com/rust-lang/rust/pull/32835).
2937 * [On Unix the runtime aborts by calling `libc::abort` instead of
2938 generating an illegal instruction](https://github.com/rust-lang/rust/pull/31457).
2939 * [Rust is now bootstrapped from the previous release of Rust,
2940 instead of a snapshot from an arbitrary commit](https://github.com/rust-lang/rust/pull/32942).
2945 * [`AtomicBool` is now bool-sized, not word-sized](https://github.com/rust-lang/rust/pull/33579).
2946 * [`target_env` for Linux ARM targets is just `gnu`, not
2947 `gnueabihf`, `gnueabi`, etc](https://github.com/rust-lang/rust/pull/33403).
2948 * [Consistently panic on overflow in `Duration::new`](https://github.com/rust-lang/rust/pull/33072).
2949 * [Change `String::truncate` to panic less](https://github.com/rust-lang/rust/pull/32977).
2950 * [Add `:block` to the follow set for `:ty` and `:path`](https://github.com/rust-lang/rust/pull/32945).
2951 Affects how macros are parsed.
2952 * [Fix macro hygiene bug](https://github.com/rust-lang/rust/pull/32923).
2953 * [Feature-gated attributes on macro-generated macro invocations are
2954 now rejected](https://github.com/rust-lang/rust/pull/32791).
2955 * [Suppress fallback and ambiguity errors during type inference](https://github.com/rust-lang/rust/pull/32258).
2956 This caused some minor changes to type inference.
2959 Version 1.9.0 (2016-05-26)
2960 ==========================
2965 * The `#[deprecated]` attribute when applied to an API will generate
2966 warnings when used. The warnings may be suppressed with
2967 `#[allow(deprecated)]`. [RFC 1270].
2968 * [`fn` item types are zero sized, and each `fn` names a unique
2969 type][1.9fn]. This will break code that transmutes `fn`s, so calling
2970 `transmute` on a `fn` type will generate a warning for a few cycles,
2971 then will be converted to an error.
2972 * [Field and method resolution understand visibility, so private
2973 fields and methods cannot prevent the proper use of public fields
2974 and methods][1.9fv].
2975 * [The parser considers unicode codepoints in the
2976 `PATTERN_WHITE_SPACE` category to be whitespace][1.9ws].
2982 * [`std::panic::catch_unwind`][] (renamed from `recover`)
2983 * [`std::panic::resume_unwind`][] (renamed from `propagate`)
2984 * [`std::panic::AssertUnwindSafe`][] (renamed from `AssertRecoverSafe`)
2985 * [`std::panic::UnwindSafe`][] (renamed from `RecoverSafe`)
2986 * [`str::is_char_boundary`]
2987 * [`<*const T>::as_ref`]
2988 * [`<*mut T>::as_ref`]
2989 * [`<*mut T>::as_mut`]
2990 * [`AsciiExt::make_ascii_uppercase`]
2991 * [`AsciiExt::make_ascii_lowercase`]
2992 * [`char::decode_utf16`]
2993 * [`char::DecodeUtf16`]
2994 * [`char::DecodeUtf16Error`]
2995 * [`char::DecodeUtf16Error::unpaired_surrogate`]
2996 * [`BTreeSet::take`]
2997 * [`BTreeSet::replace`]
3000 * [`HashSet::replace`]
3002 * [`OsString::with_capacity`]
3003 * [`OsString::clear`]
3004 * [`OsString::capacity`]
3005 * [`OsString::reserve`]
3006 * [`OsString::reserve_exact`]
3007 * [`OsStr::is_empty`]
3009 * [`std::os::unix::thread`]
3012 * [`JoinHandleExt::as_pthread_t`]
3013 * [`JoinHandleExt::into_pthread_t`]
3014 * [`HashSet::hasher`]
3015 * [`HashMap::hasher`]
3016 * [`CommandExt::exec`]
3017 * [`File::try_clone`]
3018 * [`SocketAddr::set_ip`]
3019 * [`SocketAddr::set_port`]
3020 * [`SocketAddrV4::set_ip`]
3021 * [`SocketAddrV4::set_port`]
3022 * [`SocketAddrV6::set_ip`]
3023 * [`SocketAddrV6::set_port`]
3024 * [`SocketAddrV6::set_flowinfo`]
3025 * [`SocketAddrV6::set_scope_id`]
3026 * [`slice::copy_from_slice`]
3027 * [`ptr::read_volatile`]
3028 * [`ptr::write_volatile`]
3029 * [`OpenOptions::create_new`]
3030 * [`TcpStream::set_nodelay`]
3031 * [`TcpStream::nodelay`]
3032 * [`TcpStream::set_ttl`]
3033 * [`TcpStream::ttl`]
3034 * [`TcpStream::set_only_v6`]
3035 * [`TcpStream::only_v6`]
3036 * [`TcpStream::take_error`]
3037 * [`TcpStream::set_nonblocking`]
3038 * [`TcpListener::set_ttl`]
3039 * [`TcpListener::ttl`]
3040 * [`TcpListener::set_only_v6`]
3041 * [`TcpListener::only_v6`]
3042 * [`TcpListener::take_error`]
3043 * [`TcpListener::set_nonblocking`]
3044 * [`UdpSocket::set_broadcast`]
3045 * [`UdpSocket::broadcast`]
3046 * [`UdpSocket::set_multicast_loop_v4`]
3047 * [`UdpSocket::multicast_loop_v4`]
3048 * [`UdpSocket::set_multicast_ttl_v4`]
3049 * [`UdpSocket::multicast_ttl_v4`]
3050 * [`UdpSocket::set_multicast_loop_v6`]
3051 * [`UdpSocket::multicast_loop_v6`]
3052 * [`UdpSocket::set_multicast_ttl_v6`]
3053 * [`UdpSocket::multicast_ttl_v6`]
3054 * [`UdpSocket::set_ttl`]
3055 * [`UdpSocket::ttl`]
3056 * [`UdpSocket::set_only_v6`]
3057 * [`UdpSocket::only_v6`]
3058 * [`UdpSocket::join_multicast_v4`]
3059 * [`UdpSocket::join_multicast_v6`]
3060 * [`UdpSocket::leave_multicast_v4`]
3061 * [`UdpSocket::leave_multicast_v6`]
3062 * [`UdpSocket::take_error`]
3063 * [`UdpSocket::connect`]
3064 * [`UdpSocket::send`]
3065 * [`UdpSocket::recv`]
3066 * [`UdpSocket::set_nonblocking`]
3071 * [`std::sync::Once` is poisoned if its initialization function
3073 * [`cell::Ref` and `cell::RefMut` can contain unsized types][1.9cu].
3074 * [Most types implement `fmt::Debug`][1.9db].
3075 * [The default buffer size used by `BufReader` and `BufWriter` was
3076 reduced to 8K, from 64K][1.9bf]. This is in line with the buffer size
3077 used by other languages.
3078 * [`Instant`, `SystemTime` and `Duration` implement `+=` and `-=`.
3079 `Duration` additionally implements `*=` and `/=`][1.9ta].
3080 * [`Skip` is a `DoubleEndedIterator`][1.9sk].
3081 * [`From<[u8; 4]>` is implemented for `Ipv4Addr`][1.9fi].
3082 * [`Chain` implements `BufRead`][1.9ch].
3083 * [`HashMap`, `HashSet` and iterators are covariant][1.9hc].
3088 * [Cargo can now run concurrently][1.9cc].
3089 * [Top-level overrides allow specific revisions of crates to be
3090 overridden through the entire crate graph][1.9ct]. This is intended
3091 to make upgrades easier for large projects, by allowing crates to be
3092 forked temporarily until they've been upgraded and republished.
3093 * [Cargo exports a `CARGO_PKG_AUTHORS` environment variable][1.9cp].
3094 * [Cargo will pass the contents of the `RUSTFLAGS` variable to `rustc`
3095 on the commandline][1.9cf]. `rustc` arguments can also be specified
3096 in the `build.rustflags` configuration key.
3101 * [The time complexity of comparing variables for equivalence during type
3102 unification is reduced from _O_(_n_!) to _O_(_n_)][1.9tu]. This leads
3103 to major compilation time improvement in some scenarios.
3104 * [`ToString` is specialized for `str`, giving it the same performance
3105 as `to_owned`][1.9ts].
3106 * [Spawning processes with `Command::output` no longer creates extra
3108 * [`#[derive(PartialEq)]` and `#[derive(PartialOrd)]` emit less code
3109 for C-like enums][1.9cl].
3114 * [Passing the `--quiet` flag to a test runner will produce
3115 much-abbreviated output][1.9q].
3116 * The Rust Project now publishes std binaries for the
3117 `mips-unknown-linux-musl`, `mipsel-unknown-linux-musl`, and
3118 `i586-pc-windows-msvc` targets.
3123 * [`std::sync::Once` is poisoned if its initialization function
3125 * [It is illegal to define methods with the same name in overlapping
3126 inherent `impl` blocks][1.9sn].
3127 * [`fn` item types are zero sized, and each `fn` names a unique
3128 type][1.9fn]. This will break code that transmutes `fn`s, so calling
3129 `transmute` on a `fn` type will generate a warning for a few cycles,
3130 then will be converted to an error.
3131 * [Improvements to const evaluation may trigger new errors when integer
3132 literals are out of range][1.9ce].
3135 [1.9bf]: https://github.com/rust-lang/rust/pull/32695
3136 [1.9cc]: https://github.com/rust-lang/cargo/pull/2486
3137 [1.9ce]: https://github.com/rust-lang/rust/pull/30587
3138 [1.9cf]: https://github.com/rust-lang/cargo/pull/2241
3139 [1.9ch]: https://github.com/rust-lang/rust/pull/32541
3140 [1.9cl]: https://github.com/rust-lang/rust/pull/31977
3141 [1.9cp]: https://github.com/rust-lang/cargo/pull/2465
3142 [1.9ct]: https://github.com/rust-lang/cargo/pull/2385
3143 [1.9cu]: https://github.com/rust-lang/rust/pull/32652
3144 [1.9db]: https://github.com/rust-lang/rust/pull/32054
3145 [1.9fi]: https://github.com/rust-lang/rust/pull/32050
3146 [1.9fn]: https://github.com/rust-lang/rust/pull/31710
3147 [1.9fv]: https://github.com/rust-lang/rust/pull/31938
3148 [1.9hc]: https://github.com/rust-lang/rust/pull/32635
3149 [1.9o]: https://github.com/rust-lang/rust/pull/32325
3150 [1.9q]: https://github.com/rust-lang/rust/pull/31887
3151 [1.9sk]: https://github.com/rust-lang/rust/pull/31700
3152 [1.9sn]: https://github.com/rust-lang/rust/pull/31925
3153 [1.9sp]: https://github.com/rust-lang/rust/pull/31618
3154 [1.9ta]: https://github.com/rust-lang/rust/pull/32448
3155 [1.9ts]: https://github.com/rust-lang/rust/pull/32586
3156 [1.9tu]: https://github.com/rust-lang/rust/pull/32062
3157 [1.9ws]: https://github.com/rust-lang/rust/pull/29734
3158 [RFC 1270]: https://github.com/rust-lang/rfcs/blob/master/text/1270-deprecation.md
3159 [`<*const T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
3160 [`<*mut T>::as_mut`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_mut
3161 [`<*mut T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
3162 [`slice::copy_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.copy_from_slice
3163 [`AsciiExt::make_ascii_lowercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_lowercase
3164 [`AsciiExt::make_ascii_uppercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_uppercase
3165 [`BTreeSet::get`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.get
3166 [`BTreeSet::replace`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.replace
3167 [`BTreeSet::take`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.take
3168 [`CommandExt::exec`]: http://doc.rust-lang.org/nightly/std/os/unix/process/trait.CommandExt.html#tymethod.exec
3169 [`File::try_clone`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html#method.try_clone
3170 [`HashMap::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.hasher
3171 [`HashSet::get`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.get
3172 [`HashSet::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.hasher
3173 [`HashSet::replace`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.replace
3174 [`HashSet::take`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.take
3175 [`JoinHandleExt::as_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.as_pthread_t
3176 [`JoinHandleExt::into_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.into_pthread_t
3177 [`JoinHandleExt`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html
3178 [`OpenOptions::create_new`]: http://doc.rust-lang.org/nightly/std/fs/struct.OpenOptions.html#method.create_new
3179 [`OsStr::is_empty`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.is_empty
3180 [`OsStr::len`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.len
3181 [`OsString::capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.capacity
3182 [`OsString::clear`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.clear
3183 [`OsString::reserve_exact`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve_exact
3184 [`OsString::reserve`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve
3185 [`OsString::with_capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.with_capacity
3186 [`RawPthread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/type.RawPthread.html
3187 [`SocketAddr::set_ip`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_ip
3188 [`SocketAddr::set_port`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_port
3189 [`SocketAddrV4::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_ip
3190 [`SocketAddrV4::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_port
3191 [`SocketAddrV6::set_flowinfo`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_flowinfo
3192 [`SocketAddrV6::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_ip
3193 [`SocketAddrV6::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_port
3194 [`SocketAddrV6::set_scope_id`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_scope_id
3195 [`TcpListener::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
3196 [`TcpListener::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
3197 [`TcpListener::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
3198 [`TcpListener::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
3199 [`TcpListener::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
3200 [`TcpListener::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
3201 [`TcpStream::nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.nodelay
3202 [`TcpStream::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
3203 [`TcpStream::set_nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nodelay
3204 [`TcpStream::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
3205 [`TcpStream::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
3206 [`TcpStream::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
3207 [`TcpStream::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
3208 [`TcpStream::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
3209 [`UdpSocket::broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.broadcast
3210 [`UdpSocket::connect`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.connect
3211 [`UdpSocket::join_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v4
3212 [`UdpSocket::join_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v6
3213 [`UdpSocket::leave_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v4
3214 [`UdpSocket::leave_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v6
3215 [`UdpSocket::multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v4
3216 [`UdpSocket::multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v6
3217 [`UdpSocket::multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v4
3218 [`UdpSocket::multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v6
3219 [`UdpSocket::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.only_v6
3220 [`UdpSocket::recv`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.recv
3221 [`UdpSocket::send`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.send
3222 [`UdpSocket::set_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_broadcast
3223 [`UdpSocket::set_multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v4
3224 [`UdpSocket::set_multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v6
3225 [`UdpSocket::set_multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v4
3226 [`UdpSocket::set_multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v6
3227 [`UdpSocket::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_nonblocking
3228 [`UdpSocket::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_only_v6
3229 [`UdpSocket::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_ttl
3230 [`UdpSocket::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.take_error
3231 [`UdpSocket::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.ttl
3232 [`char::DecodeUtf16Error::unpaired_surrogate`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html#method.unpaired_surrogate
3233 [`char::DecodeUtf16Error`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html
3234 [`char::DecodeUtf16`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16.html
3235 [`char::decode_utf16`]: http://doc.rust-lang.org/nightly/std/char/fn.decode_utf16.html
3236 [`ptr::read_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.read_volatile.html
3237 [`ptr::write_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.write_volatile.html
3238 [`std::os::unix::thread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/index.html
3239 [`std::panic::AssertUnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/struct.AssertUnwindSafe.html
3240 [`std::panic::UnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/trait.UnwindSafe.html
3241 [`std::panic::catch_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.catch_unwind.html
3242 [`std::panic::resume_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.resume_unwind.html
3243 [`std::panic`]: http://doc.rust-lang.org/nightly/std/panic/index.html
3244 [`str::is_char_boundary`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.is_char_boundary
3247 Version 1.8.0 (2016-04-14)
3248 ==========================
3253 * Rust supports overloading of compound assignment statements like
3254 `+=` by implementing the [`AddAssign`], [`SubAssign`],
3255 [`MulAssign`], [`DivAssign`], [`RemAssign`], [`BitAndAssign`],
3256 [`BitOrAssign`], [`BitXorAssign`], [`ShlAssign`], or [`ShrAssign`]
3258 * Empty structs can be defined with braces, as in `struct Foo { }`, in
3259 addition to the non-braced form, `struct Foo;`. [RFC 218].
3265 * [`str::encode_utf16`][] (renamed from `utf16_units`)
3266 * [`str::EncodeUtf16`][] (renamed from `Utf16Units`)
3269 * [`ptr::drop_in_place`]
3271 * [`time::SystemTime`]
3273 * [`Instant::duration_since`][] (renamed from `duration_from_earlier`)
3274 * [`Instant::elapsed`]
3275 * [`SystemTime::now`]
3276 * [`SystemTime::duration_since`][] (renamed from `duration_from_earlier`)
3277 * [`SystemTime::elapsed`]
3278 * Various `Add`/`Sub` impls for `Time` and `SystemTime`
3279 * [`SystemTimeError`]
3280 * [`SystemTimeError::duration`]
3281 * Various impls for `SystemTimeError`
3283 * [`AddAssign`], [`SubAssign`], [`MulAssign`], [`DivAssign`],
3284 [`RemAssign`], [`BitAndAssign`], [`BitOrAssign`],
3285 [`BitXorAssign`], [`ShlAssign`], [`ShrAssign`].
3286 * [The `write!` and `writeln!` macros correctly emit errors if any of
3287 their arguments can't be formatted][1.8w].
3288 * [Various I/O functions support large files on 32-bit Linux][1.8l].
3289 * [The Unix-specific `raw` modules, which contain a number of
3290 redefined C types are deprecated][1.8r], including `os::raw::unix`,
3291 `os::raw::macos`, and `os::raw::linux`. These modules defined types
3292 such as `ino_t` and `dev_t`. The inconsistency of these definitions
3293 across platforms was making it difficult to implement `std`
3294 correctly. Those that need these definitions should use the `libc`
3296 * The Unix-specific `MetadataExt` traits, including
3297 `os::unix::fs::MetadataExt`, which expose values such as inode
3298 numbers [no longer return platform-specific types][1.8r], but
3299 instead return widened integers. [RFC 1415].
3300 * [`btree_set::{IntoIter, Iter, Range}` are covariant][1.8cv].
3301 * [Atomic loads and stores are not volatile][1.8a].
3302 * [All types in `sync::mpsc` implement `fmt::Debug`][1.8mp].
3307 * [Inlining hash functions lead to a 3% compile-time improvement in
3308 some workloads][1.8h].
3309 * When using jemalloc, its symbols are [unprefixed so that it
3310 overrides the libc malloc implementation][1.8h]. This means that for
3311 rustc, LLVM is now using jemalloc, which results in a 6%
3312 compile-time improvement on a specific workload.
3313 * [Avoid quadratic growth in function size due to cleanups][1.8cu].
3318 * [32-bit MSVC builds finally implement unwinding][1.8ms].
3319 i686-pc-windows-msvc is now considered a tier-1 platform.
3320 * [The `--print targets` flag prints a list of supported targets][1.8t].
3321 * [The `--print cfg` flag prints the `cfg`s defined for the current
3323 * [`rustc` can be built with an new Cargo-based build system, written
3324 in Rust][1.8b]. It will eventually replace Rust's Makefile-based
3325 build system. To enable it configure with `configure --rustbuild`.
3326 * [Errors for non-exhaustive `match` patterns now list up to 3 missing
3327 variants while also indicating the total number of missing variants
3328 if more than 3][1.8m].
3329 * [Executable stacks are disabled on Linux and BSD][1.8nx].
3330 * The Rust Project now publishes binary releases of the standard
3331 library for a number of tier-2 targets:
3332 `armv7-unknown-linux-gnueabihf`, `powerpc-unknown-linux-gnu`,
3333 `powerpc64-unknown-linux-gnu`, `powerpc64le-unknown-linux-gnu`
3334 `x86_64-rumprun-netbsd`. These can be installed with
3335 tools such as [multirust][1.8mr].
3340 * [`cargo init` creates a new Cargo project in the current
3341 directory][1.8ci]. It is otherwise like `cargo new`.
3342 * [Cargo has configuration keys for `-v` and
3343 `--color`][1.8cc]. `verbose` and `color`, respectively, go in the
3344 `[term]` section of `.cargo/config`.
3345 * [Configuration keys that evaluate to strings or integers can be set
3346 via environment variables][1.8ce]. For example the `build.jobs` key
3347 can be set via `CARGO_BUILD_JOBS`. Environment variables take
3348 precedence over config files.
3349 * [Target-specific dependencies support Rust `cfg` syntax for
3350 describing targets][1.8cfg] so that dependencies for multiple
3351 targets can be specified together. [RFC 1361].
3352 * [The environment variables `CARGO_TARGET_ROOT`, `RUSTC`, and
3353 `RUSTDOC` take precedence over the `build.target-dir`,
3354 `build.rustc`, and `build.rustdoc` configuration values][1.8cv].
3355 * [The child process tree is killed on Windows when Cargo is
3357 * [The `build.target` configuration value sets the target platform,
3358 like `--target`][1.8ct].
3363 * [Unstable compiler flags have been further restricted][1.8u]. Since
3364 1.0 `-Z` flags have been considered unstable, and other flags that
3365 were considered unstable additionally required passing `-Z
3366 unstable-options` to access. Unlike unstable language and library
3367 features though, these options have been accessible on the stable
3368 release channel. Going forward, *new unstable flags will not be
3369 available on the stable release channel*, and old unstable flags
3370 will warn about their usage. In the future, all unstable flags will
3371 be unavailable on the stable release channel.
3372 * [It is no longer possible to `match` on empty enum variants using
3373 the `Variant(..)` syntax][1.8v]. This has been a warning since 1.6.
3374 * The Unix-specific `MetadataExt` traits, including
3375 `os::unix::fs::MetadataExt`, which expose values such as inode
3376 numbers [no longer return platform-specific types][1.8r], but
3377 instead return widened integers. [RFC 1415].
3378 * [Modules sourced from the filesystem cannot appear within arbitrary
3379 blocks, but only within other modules][1.8mf].
3380 * [`--cfg` compiler flags are parsed strictly as identifiers][1.8c].
3381 * On Unix, [stack overflow triggers a runtime abort instead of a
3383 * [`Command::spawn` and its equivalents return an error if any of
3384 its command-line arguments contain interior `NUL`s][1.8n].
3385 * [Tuple and unit enum variants from other crates are in the type
3387 * [On Windows `rustc` emits `.lib` files for the `staticlib` library
3388 type instead of `.a` files][1.8st]. Additionally, for the MSVC
3389 toolchain, `rustc` emits import libraries named `foo.dll.lib`
3390 instead of `foo.lib`.
3393 [1.8a]: https://github.com/rust-lang/rust/pull/30962
3394 [1.8b]: https://github.com/rust-lang/rust/pull/31123
3395 [1.8c]: https://github.com/rust-lang/rust/pull/31530
3396 [1.8cc]: https://github.com/rust-lang/cargo/pull/2397
3397 [1.8ce]: https://github.com/rust-lang/cargo/pull/2398
3398 [1.8cf]: https://github.com/rust-lang/rust/pull/31278
3399 [1.8cfg]: https://github.com/rust-lang/cargo/pull/2328
3400 [1.8ci]: https://github.com/rust-lang/cargo/pull/2081
3401 [1.8ck]: https://github.com/rust-lang/cargo/pull/2370
3402 [1.8ct]: https://github.com/rust-lang/cargo/pull/2335
3403 [1.8cu]: https://github.com/rust-lang/rust/pull/31390
3404 [1.8cv]: https://github.com/rust-lang/cargo/issues/2365
3405 [1.8cv]: https://github.com/rust-lang/rust/pull/30998
3406 [1.8h]: https://github.com/rust-lang/rust/pull/31460
3407 [1.8l]: https://github.com/rust-lang/rust/pull/31668
3408 [1.8m]: https://github.com/rust-lang/rust/pull/31020
3409 [1.8mf]: https://github.com/rust-lang/rust/pull/31534
3410 [1.8mp]: https://github.com/rust-lang/rust/pull/30894
3411 [1.8mr]: https://users.rust-lang.org/t/multirust-0-8-with-cross-std-installation/4901
3412 [1.8ms]: https://github.com/rust-lang/rust/pull/30448
3413 [1.8n]: https://github.com/rust-lang/rust/pull/31056
3414 [1.8nx]: https://github.com/rust-lang/rust/pull/30859
3415 [1.8r]: https://github.com/rust-lang/rust/pull/31551
3416 [1.8so]: https://github.com/rust-lang/rust/pull/31333
3417 [1.8st]: https://github.com/rust-lang/rust/pull/29520
3418 [1.8t]: https://github.com/rust-lang/rust/pull/31358
3419 [1.8tn]: https://github.com/rust-lang/rust/pull/30882
3420 [1.8u]: https://github.com/rust-lang/rust/pull/31793
3421 [1.8v]: https://github.com/rust-lang/rust/pull/31757
3422 [1.8w]: https://github.com/rust-lang/rust/pull/31904
3423 [RFC 1361]: https://github.com/rust-lang/rfcs/blob/master/text/1361-cargo-cfg-dependencies.md
3424 [RFC 1415]: https://github.com/rust-lang/rfcs/blob/master/text/1415-trim-std-os.md
3425 [RFC 218]: https://github.com/rust-lang/rfcs/blob/master/text/0218-empty-struct-with-braces.md
3426 [RFC 953]: https://github.com/rust-lang/rfcs/blob/master/text/0953-op-assign.md
3427 [`AddAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.AddAssign.html
3428 [`BitAndAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitAndAssign.html
3429 [`BitOrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitOrAssign.html
3430 [`BitXorAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitXorAssign.html
3431 [`DivAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.DivAssign.html
3432 [`Instant::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.duration_since
3433 [`Instant::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.elapsed
3434 [`Instant::now`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.now
3435 [`MulAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.MulAssign.html
3436 [`Ref::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.Ref.html#method.map
3437 [`RefMut::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.RefMut.html#method.map
3438 [`RemAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.RemAssign.html
3439 [`ShlAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShlAssign.html
3440 [`ShrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShrAssign.html
3441 [`SubAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.SubAssign.html
3442 [`SystemTime::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.duration_since
3443 [`SystemTime::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.elapsed
3444 [`SystemTime::now`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.now
3445 [`SystemTimeError::duration`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html#method.duration
3446 [`SystemTimeError`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html
3447 [`UNIX_EPOCH`]: http://doc.rust-lang.org/nightly/std/time/constant.UNIX_EPOCH.html
3448 [`ptr::drop_in_place`]: http://doc.rust-lang.org/nightly/std/ptr/fn.drop_in_place.html
3449 [`str::EncodeUtf16`]: http://doc.rust-lang.org/nightly/std/str/struct.EncodeUtf16.html
3450 [`str::encode_utf16`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.encode_utf16
3451 [`time::Instant`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html
3452 [`time::SystemTime`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html
3455 Version 1.7.0 (2016-03-03)
3456 ==========================
3463 * [`Path::strip_prefix`][] (renamed from relative_from)
3464 * [`path::StripPrefixError`][] (new error type returned from strip_prefix)
3466 * [`Ipv4Addr::is_loopback`]
3467 * [`Ipv4Addr::is_private`]
3468 * [`Ipv4Addr::is_link_local`]
3469 * [`Ipv4Addr::is_multicast`]
3470 * [`Ipv4Addr::is_broadcast`]
3471 * [`Ipv4Addr::is_documentation`]
3473 * [`Ipv6Addr::is_unspecified`]
3474 * [`Ipv6Addr::is_loopback`]
3475 * [`Ipv6Addr::is_multicast`]
3478 * [`Vec::as_mut_slice`]
3480 * [`String::as_str`]
3481 * [`String::as_mut_str`]
3483 * `<[T]>::`[`clone_from_slice`], which now requires the two slices to
3485 * `<[T]>::`[`sort_by_key`]
3486 * checked, saturated, and overflowing operations
3487 * [`i32::checked_rem`], [`i32::checked_neg`], [`i32::checked_shl`], [`i32::checked_shr`]
3488 * [`i32::saturating_mul`]
3489 * [`i32::overflowing_add`], [`i32::overflowing_sub`], [`i32::overflowing_mul`], [`i32::overflowing_div`]
3490 * [`i32::overflowing_rem`], [`i32::overflowing_neg`], [`i32::overflowing_shl`], [`i32::overflowing_shr`]
3491 * [`u32::checked_rem`], [`u32::checked_neg`], [`u32::checked_shl`], [`u32::checked_shl`]
3492 * [`u32::saturating_mul`]
3493 * [`u32::overflowing_add`], [`u32::overflowing_sub`], [`u32::overflowing_mul`], [`u32::overflowing_div`]
3494 * [`u32::overflowing_rem`], [`u32::overflowing_neg`], [`u32::overflowing_shl`], [`u32::overflowing_shr`]
3495 * and checked, saturated, and overflowing operations for other primitive types
3497 * [`ffi::IntoStringError`]
3498 * [`CString::into_string`]
3499 * [`CString::into_bytes`]
3500 * [`CString::into_bytes_with_nul`]
3501 * `From<CString> for Vec<u8>`
3503 * [`IntoStringError::into_cstring`]
3504 * [`IntoStringError::utf8_error`]
3505 * `Error for IntoStringError`
3507 * [`std::hash::BuildHasher`]
3508 * [`BuildHasher::Hasher`]
3509 * [`BuildHasher::build_hasher`]
3510 * [`std::hash::BuildHasherDefault`]
3511 * [`HashMap::with_hasher`]
3512 * [`HashMap::with_capacity_and_hasher`]
3513 * [`HashSet::with_hasher`]
3514 * [`HashSet::with_capacity_and_hasher`]
3515 * [`std::collections::hash_map::RandomState`]
3516 * [`RandomState::new`]
3517 * [Validating UTF-8 is faster by a factor of between 7 and 14x for
3518 ASCII input][1.7utf8]. This means that creating `String`s and `str`s
3519 from bytes is faster.
3520 * [The performance of `LineWriter` (and thus `io::stdout`) was
3521 improved by using `memchr` to search for newlines][1.7m].
3522 * [`f32::to_degrees` and `f32::to_radians` are stable][1.7f]. The
3523 `f64` variants were stabilized previously.
3524 * [`BTreeMap` was rewritten to use less memory and improve the performance
3525 of insertion and iteration, the latter by as much as 5x][1.7bm].
3526 * [`BTreeSet` and its iterators, `Iter`, `IntoIter`, and `Range` are
3527 covariant over their contained type][1.7bt].
3528 * [`LinkedList` and its iterators, `Iter` and `IntoIter` are covariant
3529 over their contained type][1.7ll].
3530 * [`str::replace` now accepts a `Pattern`][1.7rp], like other string
3532 * [`Any` is implemented for unsized types][1.7a].
3533 * [`Hash` is implemented for `Duration`][1.7h].
3538 * [When running tests with `--test`, rustdoc will pass `--cfg`
3539 arguments to the compiler][1.7dt].
3540 * [The compiler is built with RPATH information by default][1.7rpa].
3541 This means that it will be possible to run `rustc` when installed in
3542 unusual configurations without configuring the dynamic linker search
3544 * [`rustc` passes `--enable-new-dtags` to GNU ld][1.7dta]. This makes
3545 any RPATH entries (emitted with `-C rpath`) *not* take precedence
3546 over `LD_LIBRARY_PATH`.
3551 * [`cargo rustc` accepts a `--profile` flag that runs `rustc` under
3552 any of the compilation profiles, 'dev', 'bench', or 'test'][1.7cp].
3553 * [The `rerun-if-changed` build script directive no longer causes the
3554 build script to incorrectly run twice in certain scenarios][1.7rr].
3559 * Soundness fixes to the interactions between associated types and
3560 lifetimes, specified in [RFC 1214], [now generate errors][1.7sf] for
3561 code that violates the new rules. This is a significant change that
3562 is known to break existing code, so it has emitted warnings for the
3563 new error cases since 1.4 to give crate authors time to adapt. The
3564 details of what is changing are subtle; read the RFC for more.
3565 * [Several bugs in the compiler's visibility calculations were
3566 fixed][1.7v]. Since this was found to break significant amounts of
3567 code, the new errors will be emitted as warnings for several release
3568 cycles, under the `private_in_public` lint.
3569 * Defaulted type parameters were accidentally accepted in positions
3570 that were not intended. In this release, [defaulted type parameters
3571 appearing outside of type definitions will generate a
3572 warning][1.7d], which will become an error in future releases.
3573 * [Parsing "." as a float results in an error instead of 0][1.7p].
3574 That is, `".".parse::<f32>()` returns `Err`, not `Ok(0.0)`.
3575 * [Borrows of closure parameters may not outlive the closure][1.7bc].
3577 [1.7a]: https://github.com/rust-lang/rust/pull/30928
3578 [1.7bc]: https://github.com/rust-lang/rust/pull/30341
3579 [1.7bm]: https://github.com/rust-lang/rust/pull/30426
3580 [1.7bt]: https://github.com/rust-lang/rust/pull/30998
3581 [1.7cp]: https://github.com/rust-lang/cargo/pull/2224
3582 [1.7d]: https://github.com/rust-lang/rust/pull/30724
3583 [1.7dt]: https://github.com/rust-lang/rust/pull/30372
3584 [1.7dta]: https://github.com/rust-lang/rust/pull/30394
3585 [1.7f]: https://github.com/rust-lang/rust/pull/30672
3586 [1.7h]: https://github.com/rust-lang/rust/pull/30818
3587 [1.7ll]: https://github.com/rust-lang/rust/pull/30663
3588 [1.7m]: https://github.com/rust-lang/rust/pull/30381
3589 [1.7p]: https://github.com/rust-lang/rust/pull/30681
3590 [1.7rp]: https://github.com/rust-lang/rust/pull/29498
3591 [1.7rpa]: https://github.com/rust-lang/rust/pull/30353
3592 [1.7rr]: https://github.com/rust-lang/cargo/pull/2279
3593 [1.7sf]: https://github.com/rust-lang/rust/pull/30389
3594 [1.7utf8]: https://github.com/rust-lang/rust/pull/30740
3595 [1.7v]: https://github.com/rust-lang/rust/pull/29973
3596 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
3597 [`BuildHasher::Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
3598 [`BuildHasher::build_hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html#tymethod.build_hasher
3599 [`CString::into_bytes_with_nul`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes_with_nul
3600 [`CString::into_bytes`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes
3601 [`CString::into_string`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_string
3602 [`HashMap::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_capacity_and_hasher
3603 [`HashMap::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_hasher
3604 [`HashSet::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_capacity_and_hasher
3605 [`HashSet::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_hasher
3606 [`IntoStringError::into_cstring`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.into_cstring
3607 [`IntoStringError::utf8_error`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.utf8_error
3608 [`Ipv4Addr::is_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_broadcast
3609 [`Ipv4Addr::is_documentation`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_documentation
3610 [`Ipv4Addr::is_link_local`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_link_local
3611 [`Ipv4Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_loopback
3612 [`Ipv4Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_multicast
3613 [`Ipv4Addr::is_private`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_private
3614 [`Ipv6Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_loopback
3615 [`Ipv6Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_multicast
3616 [`Ipv6Addr::is_unspecified`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_unspecified
3617 [`Path::strip_prefix`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.strip_prefix
3618 [`RandomState::new`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html#method.new
3619 [`String::as_mut_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_mut_str
3620 [`String::as_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_str
3621 [`Vec::as_mut_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_mut_slice
3622 [`Vec::as_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_slice
3623 [`clone_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.clone_from_slice
3624 [`ffi::IntoStringError`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html
3625 [`i32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_neg
3626 [`i32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_rem
3627 [`i32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shl
3628 [`i32::checked_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shr
3629 [`i32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_add
3630 [`i32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_div
3631 [`i32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_mul
3632 [`i32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_neg
3633 [`i32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_rem
3634 [`i32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shl
3635 [`i32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shr
3636 [`i32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_sub
3637 [`i32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.saturating_mul
3638 [`path::StripPrefixError`]: http://doc.rust-lang.org/nightly/std/path/struct.StripPrefixError.html
3639 [`sort_by_key`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.sort_by_key
3640 [`std::collections::hash_map::RandomState`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html
3641 [`std::hash::BuildHasherDefault`]: http://doc.rust-lang.org/nightly/std/hash/struct.BuildHasherDefault.html
3642 [`std::hash::BuildHasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html
3643 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
3644 [`u32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_rem
3645 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
3646 [`u32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_shl
3647 [`u32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_add
3648 [`u32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_div
3649 [`u32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_mul
3650 [`u32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_neg
3651 [`u32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_rem
3652 [`u32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shl
3653 [`u32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shr
3654 [`u32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_sub
3655 [`u32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.saturating_mul
3658 Version 1.6.0 (2016-01-21)
3659 ==========================
3664 * The `#![no_std]` attribute causes a crate to not be linked to the
3665 standard library, but only the [core library][1.6co], as described
3666 in [RFC 1184]. The core library defines common types and traits but
3667 has no platform dependencies whatsoever, and is the basis for Rust
3668 software in environments that cannot support a full port of the
3669 standard library, such as operating systems. Most of the core
3670 library is now stable.
3676 [`Read::read_exact`],
3677 [`ErrorKind::UnexpectedEof`][] (renamed from `UnexpectedEOF`),
3678 [`fs::DirBuilder`], [`fs::DirBuilder::new`],
3679 [`fs::DirBuilder::recursive`], [`fs::DirBuilder::create`],
3680 [`os::unix::fs::DirBuilderExt`],
3681 [`os::unix::fs::DirBuilderExt::mode`], [`vec::Drain`],
3682 [`vec::Vec::drain`], [`string::Drain`], [`string::String::drain`],
3683 [`vec_deque::Drain`], [`vec_deque::VecDeque::drain`],
3684 [`collections::hash_map::Drain`],
3685 [`collections::hash_map::HashMap::drain`],
3686 [`collections::hash_set::Drain`],
3687 [`collections::hash_set::HashSet::drain`],
3688 [`collections::binary_heap::Drain`],
3689 [`collections::binary_heap::BinaryHeap::drain`],
3690 [`Vec::extend_from_slice`][] (renamed from `push_all`),
3691 [`Mutex::get_mut`], [`Mutex::into_inner`], [`RwLock::get_mut`],
3692 [`RwLock::into_inner`],
3693 [`Iterator::min_by_key`][] (renamed from `min_by`),
3694 [`Iterator::max_by_key`][] (renamed from `max_by`).
3695 * The [core library][1.6co] is stable, as are most of its APIs.
3696 * [The `assert_eq!` macro supports arguments that don't implement
3697 `Sized`][1.6ae], such as arrays. In this way it behaves more like
3699 * Several timer functions that take duration in milliseconds [are
3700 deprecated in favor of those that take `Duration`][1.6ms]. These
3701 include `Condvar::wait_timeout_ms`, `thread::sleep_ms`, and
3702 `thread::park_timeout_ms`.
3703 * The algorithm by which `Vec` reserves additional elements was
3704 [tweaked to not allocate excessive space][1.6a] while still growing
3706 * `From` conversions are [implemented from integers to floats][1.6f]
3707 in cases where the conversion is lossless. Thus they are not
3708 implemented for 32-bit ints to `f32`, nor for 64-bit ints to `f32`
3709 or `f64`. They are also not implemented for `isize` and `usize`
3710 because the implementations would be platform-specific. `From` is
3711 also implemented from `f32` to `f64`.
3712 * `From<&Path>` and `From<PathBuf>` are implemented for `Cow<Path>`.
3713 * `From<T>` is implemented for `Box<T>`, `Rc<T>` and `Arc<T>`.
3714 * `IntoIterator` is implemented for `&PathBuf` and `&Path`.
3715 * [`BinaryHeap` was refactored][1.6bh] for modest performance
3717 * Sorting slices that are already sorted [is 50% faster in some
3723 * Cargo will look in `$CARGO_HOME/bin` for subcommands [by default][1.6c].
3724 * Cargo build scripts can specify their dependencies by emitting the
3725 [`rerun-if-changed`][1.6rr] key.
3726 * crates.io will reject publication of crates with dependencies that
3727 have a wildcard version constraint. Crates with wildcard
3728 dependencies were seen to cause a variety of problems, as described
3729 in [RFC 1241]. Since 1.5 publication of such crates has emitted a
3731 * `cargo clean` [accepts a `--release` flag][1.6cc] to clean the
3732 release folder. A variety of artifacts that Cargo failed to clean
3733 are now correctly deleted.
3738 * The `unreachable_code` lint [warns when a function call's argument
3740 * The parser indicates [failures that may be caused by
3741 confusingly-similar Unicode characters][1.6uc]
3742 * Certain macro errors [are reported at definition time][1.6m], not
3748 * The compiler no longer makes use of the [`RUST_PATH`][1.6rp]
3749 environment variable when locating crates. This was a pre-cargo
3750 feature for integrating with the package manager that was
3751 accidentally never removed.
3752 * [A number of bugs were fixed in the privacy checker][1.6p] that
3753 could cause previously-accepted code to break.
3754 * [Modules and unit/tuple structs may not share the same name][1.6ts].
3755 * [Bugs in pattern matching unit structs were fixed][1.6us]. The tuple
3756 struct pattern syntax (`Foo(..)`) can no longer be used to match
3757 unit structs. This is a warning now, but will become an error in
3758 future releases. Patterns that share the same name as a const are
3760 * A bug was fixed that causes [rustc not to apply default type
3761 parameters][1.6xc] when resolving certain method implementations of
3762 traits defined in other crates.
3764 [1.6a]: https://github.com/rust-lang/rust/pull/29454
3765 [1.6ae]: https://github.com/rust-lang/rust/pull/29770
3766 [1.6bh]: https://github.com/rust-lang/rust/pull/29811
3767 [1.6c]: https://github.com/rust-lang/cargo/pull/2192
3768 [1.6cc]: https://github.com/rust-lang/cargo/pull/2131
3769 [1.6co]: http://doc.rust-lang.org/beta/core/index.html
3770 [1.6dv]: https://github.com/rust-lang/rust/pull/30000
3771 [1.6f]: https://github.com/rust-lang/rust/pull/29129
3772 [1.6m]: https://github.com/rust-lang/rust/pull/29828
3773 [1.6ms]: https://github.com/rust-lang/rust/pull/29604
3774 [1.6p]: https://github.com/rust-lang/rust/pull/29726
3775 [1.6rp]: https://github.com/rust-lang/rust/pull/30034
3776 [1.6rr]: https://github.com/rust-lang/cargo/pull/2134
3777 [1.6s]: https://github.com/rust-lang/rust/pull/29675
3778 [1.6ts]: https://github.com/rust-lang/rust/issues/21546
3779 [1.6uc]: https://github.com/rust-lang/rust/pull/29837
3780 [1.6us]: https://github.com/rust-lang/rust/pull/29383
3781 [1.6xc]: https://github.com/rust-lang/rust/issues/30123
3782 [RFC 1184]: https://github.com/rust-lang/rfcs/blob/master/text/1184-stabilize-no_std.md
3783 [RFC 1241]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
3784 [`ErrorKind::UnexpectedEof`]: http://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html#variant.UnexpectedEof
3785 [`Iterator::max_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.max_by_key
3786 [`Iterator::min_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.min_by_key
3787 [`Mutex::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.get_mut
3788 [`Mutex::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.into_inner
3789 [`Read::read_exact`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_exact
3790 [`RwLock::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.get_mut
3791 [`RwLock::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.into_inner
3792 [`Vec::extend_from_slice`]: http://doc.rust-lang.org/nightly/collections/vec/struct.Vec.html#method.extend_from_slice
3793 [`collections::binary_heap::BinaryHeap::drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.BinaryHeap.html#method.drain
3794 [`collections::binary_heap::Drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.Drain.html
3795 [`collections::hash_map::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.Drain.html
3796 [`collections::hash_map::HashMap::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.HashMap.html#method.drain
3797 [`collections::hash_set::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.Drain.html
3798 [`collections::hash_set::HashSet::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.HashSet.html#method.drain
3799 [`fs::DirBuilder::create`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.create
3800 [`fs::DirBuilder::new`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.new
3801 [`fs::DirBuilder::recursive`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.recursive
3802 [`fs::DirBuilder`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html
3803 [`os::unix::fs::DirBuilderExt::mode`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html#tymethod.mode
3804 [`os::unix::fs::DirBuilderExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html
3805 [`string::Drain`]: http://doc.rust-lang.org/nightly/std/string/struct.Drain.html
3806 [`string::String::drain`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.drain
3807 [`vec::Drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Drain.html
3808 [`vec::Vec::drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.drain
3809 [`vec_deque::Drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.Drain.html
3810 [`vec_deque::VecDeque::drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.VecDeque.html#method.drain
3813 Version 1.5.0 (2015-12-10)
3814 ==========================
3816 * ~700 changes, numerous bugfixes
3822 [`BinaryHeap::from`], [`BinaryHeap::into_sorted_vec`],
3823 [`BinaryHeap::into_vec`], [`Condvar::wait_timeout`],
3824 [`FileTypeExt::is_block_device`], [`FileTypeExt::is_char_device`],
3825 [`FileTypeExt::is_fifo`], [`FileTypeExt::is_socket`],
3826 [`FileTypeExt`], [`Formatter::alternate`], [`Formatter::fill`],
3827 [`Formatter::precision`], [`Formatter::sign_aware_zero_pad`],
3828 [`Formatter::sign_minus`], [`Formatter::sign_plus`],
3829 [`Formatter::width`], [`Iterator::cmp`], [`Iterator::eq`],
3830 [`Iterator::ge`], [`Iterator::gt`], [`Iterator::le`],
3831 [`Iterator::lt`], [`Iterator::ne`], [`Iterator::partial_cmp`],
3832 [`Path::canonicalize`], [`Path::exists`], [`Path::is_dir`],
3833 [`Path::is_file`], [`Path::metadata`], [`Path::read_dir`],
3834 [`Path::read_link`], [`Path::symlink_metadata`],
3835 [`Utf8Error::valid_up_to`], [`Vec::resize`],
3836 [`VecDeque::as_mut_slices`], [`VecDeque::as_slices`],
3837 [`VecDeque::insert`], [`VecDeque::shrink_to_fit`],
3838 [`VecDeque::swap_remove_back`], [`VecDeque::swap_remove_front`],
3839 [`slice::split_first_mut`], [`slice::split_first`],
3840 [`slice::split_last_mut`], [`slice::split_last`],
3841 [`char::from_u32_unchecked`], [`fs::canonicalize`],
3842 [`str::MatchIndices`], [`str::RMatchIndices`],
3843 [`str::match_indices`], [`str::rmatch_indices`],
3844 [`str::slice_mut_unchecked`], [`string::ParseError`].
3845 * Rust applications hosted on crates.io can be installed locally to
3846 `~/.cargo/bin` with the [`cargo install`] command. Among other
3847 things this makes it easier to augment Cargo with new subcommands:
3848 when a binary named e.g. `cargo-foo` is found in `$PATH` it can be
3849 invoked as `cargo foo`.
3850 * Crates with wildcard (`*`) dependencies will [emit warnings when
3851 published][1.5w]. In 1.6 it will no longer be possible to publish
3852 crates with wildcard dependencies.
3857 * The rules determining when a particular lifetime must outlive
3858 a particular value (known as '[dropck]') have been [modified
3859 to not rely on parametricity][1.5p].
3860 * [Implementations of `AsRef` and `AsMut` were added to `Box`, `Rc`,
3861 and `Arc`][1.5a]. Because these smart pointer types implement
3862 `Deref`, this causes breakage in cases where the interior type
3863 contains methods of the same name.
3864 * [Correct a bug in Rc/Arc][1.5c] that caused [dropck] to be unaware
3865 that they could drop their content. Soundness fix.
3866 * All method invocations are [properly checked][1.5wf1] for
3867 [well-formedness][1.5wf2]. Soundness fix.
3868 * Traits whose supertraits contain `Self` are [not object
3869 safe][1.5o]. Soundness fix.
3870 * Target specifications support a [`no_default_libraries`][1.5nd]
3871 setting that controls whether `-nodefaultlibs` is passed to the
3872 linker, and in turn the `is_like_windows` setting no longer affects
3873 the `-nodefaultlibs` flag.
3874 * `#[derive(Show)]`, long-deprecated, [has been removed][1.5ds].
3875 * The `#[inline]` and `#[repr]` attributes [can only appear
3876 in valid locations][1.5at].
3877 * Native libraries linked from the local crate are [passed to
3878 the linker before native libraries from upstream crates][1.5nl].
3879 * Two rarely-used attributes, `#[no_debug]` and
3880 `#[omit_gdb_pretty_printer_section]` [are feature gated][1.5fg].
3881 * Negation of unsigned integers, which has been a warning for
3882 several releases, [is now behind a feature gate and will
3883 generate errors][1.5nu].
3884 * The parser accidentally accepted visibility modifiers on
3885 enum variants, a bug [which has been fixed][1.5ev].
3886 * [A bug was fixed that allowed `use` statements to import unstable
3892 * When evaluating expressions at compile-time that are not
3893 compile-time constants (const-evaluating expressions in non-const
3894 contexts), incorrect code such as overlong bitshifts and arithmetic
3895 overflow will [generate a warning instead of an error][1.5ce],
3896 delaying the error until runtime. This will allow the
3897 const-evaluator to be expanded in the future backwards-compatibly.
3898 * The `improper_ctypes` lint [no longer warns about using `isize` and
3899 `usize` in FFI][1.5ict].
3904 * `Arc<T>` and `Rc<T>` are [covariant with respect to `T` instead of
3906 * `Default` is [implemented for mutable slices][1.5d].
3907 * `FromStr` is [implemented for `SockAddrV4` and `SockAddrV6`][1.5s].
3908 * There are now `From` conversions [between floating point
3909 types][1.5f] where the conversions are lossless.
3910 * There are now `From` conversions [between integer types][1.5i] where
3911 the conversions are lossless.
3912 * [`fs::Metadata` implements `Clone`][1.5fs].
3913 * The `parse` method [accepts a leading "+" when parsing
3915 * [`AsMut` is implemented for `Vec`][1.5am].
3916 * The `clone_from` implementations for `String` and `BinaryHeap` [have
3917 been optimized][1.5cf] and no longer rely on the default impl.
3918 * The `extern "Rust"`, `extern "C"`, `unsafe extern "Rust"` and
3919 `unsafe extern "C"` function types now [implement `Clone`,
3920 `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and
3921 `fmt::Debug` for up to 12 arguments][1.5fp].
3922 * [Dropping `Vec`s is much faster in unoptimized builds when the
3923 element types don't implement `Drop`][1.5dv].
3924 * A bug that caused in incorrect behavior when [combining `VecDeque`
3925 with zero-sized types][1.5vdz] was resolved.
3926 * [`PartialOrd` for slices is faster][1.5po].
3931 * [Crate metadata size was reduced by 20%][1.5md].
3932 * [Improvements to code generation reduced the size of libcore by 3.3
3933 MB and rustc's memory usage by 18MB][1.5m].
3934 * [Improvements to deref translation increased performance in
3935 unoptimized builds][1.5dr].
3936 * Various errors in trait resolution [are deduplicated to only be
3937 reported once][1.5te].
3938 * Rust has preliminary [support for rumprun kernels][1.5rr].
3939 * Rust has preliminary [support for NetBSD on amd64][1.5na].
3941 [1.5use]: https://github.com/rust-lang/rust/pull/28364
3942 [1.5po]: https://github.com/rust-lang/rust/pull/28436
3943 [1.5ev]: https://github.com/rust-lang/rust/pull/28442
3944 [1.5nu]: https://github.com/rust-lang/rust/pull/28468
3945 [1.5dr]: https://github.com/rust-lang/rust/pull/28491
3946 [1.5vdz]: https://github.com/rust-lang/rust/pull/28494
3947 [1.5md]: https://github.com/rust-lang/rust/pull/28521
3948 [1.5fg]: https://github.com/rust-lang/rust/pull/28522
3949 [1.5dv]: https://github.com/rust-lang/rust/pull/28531
3950 [1.5na]: https://github.com/rust-lang/rust/pull/28543
3951 [1.5fp]: https://github.com/rust-lang/rust/pull/28560
3952 [1.5rr]: https://github.com/rust-lang/rust/pull/28593
3953 [1.5cf]: https://github.com/rust-lang/rust/pull/28602
3954 [1.5nl]: https://github.com/rust-lang/rust/pull/28605
3955 [1.5te]: https://github.com/rust-lang/rust/pull/28645
3956 [1.5at]: https://github.com/rust-lang/rust/pull/28650
3957 [1.5am]: https://github.com/rust-lang/rust/pull/28663
3958 [1.5m]: https://github.com/rust-lang/rust/pull/28778
3959 [1.5ict]: https://github.com/rust-lang/rust/pull/28779
3960 [1.5a]: https://github.com/rust-lang/rust/pull/28811
3961 [1.5pi]: https://github.com/rust-lang/rust/pull/28826
3962 [1.5ce]: https://github.com/rust-lang/rfcs/blob/master/text/1229-compile-time-asserts.md
3963 [1.5p]: https://github.com/rust-lang/rfcs/blob/master/text/1238-nonparametric-dropck.md
3964 [1.5i]: https://github.com/rust-lang/rust/pull/28921
3965 [1.5fs]: https://github.com/rust-lang/rust/pull/29021
3966 [1.5f]: https://github.com/rust-lang/rust/pull/29129
3967 [1.5ds]: https://github.com/rust-lang/rust/pull/29148
3968 [1.5s]: https://github.com/rust-lang/rust/pull/29190
3969 [1.5d]: https://github.com/rust-lang/rust/pull/29245
3970 [1.5o]: https://github.com/rust-lang/rust/pull/29259
3971 [1.5nd]: https://github.com/rust-lang/rust/pull/28578
3972 [1.5wf2]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
3973 [1.5wf1]: https://github.com/rust-lang/rust/pull/28669
3974 [dropck]: https://doc.rust-lang.org/nightly/nomicon/dropck.html
3975 [1.5c]: https://github.com/rust-lang/rust/pull/29110
3976 [1.5w]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
3977 [`cargo install`]: https://github.com/rust-lang/rfcs/blob/master/text/1200-cargo-install.md
3978 [`BinaryHeap::from`]: http://doc.rust-lang.org/nightly/std/convert/trait.From.html#method.from
3979 [`BinaryHeap::into_sorted_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_sorted_vec
3980 [`BinaryHeap::into_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_vec
3981 [`Condvar::wait_timeout`]: http://doc.rust-lang.org/nightly/std/sync/struct.Condvar.html#method.wait_timeout
3982 [`FileTypeExt::is_block_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_block_device
3983 [`FileTypeExt::is_char_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_char_device
3984 [`FileTypeExt::is_fifo`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_fifo
3985 [`FileTypeExt::is_socket`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_socket
3986 [`FileTypeExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html
3987 [`Formatter::alternate`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.alternate
3988 [`Formatter::fill`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.fill
3989 [`Formatter::precision`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.precision
3990 [`Formatter::sign_aware_zero_pad`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_aware_zero_pad
3991 [`Formatter::sign_minus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_minus
3992 [`Formatter::sign_plus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_plus
3993 [`Formatter::width`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.width
3994 [`Iterator::cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.cmp
3995 [`Iterator::eq`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.eq
3996 [`Iterator::ge`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ge
3997 [`Iterator::gt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.gt
3998 [`Iterator::le`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.le
3999 [`Iterator::lt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.lt
4000 [`Iterator::ne`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ne
4001 [`Iterator::partial_cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.partial_cmp
4002 [`Path::canonicalize`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.canonicalize
4003 [`Path::exists`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.exists
4004 [`Path::is_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_dir
4005 [`Path::is_file`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_file
4006 [`Path::metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.metadata
4007 [`Path::read_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_dir
4008 [`Path::read_link`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_link
4009 [`Path::symlink_metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.symlink_metadata
4010 [`Utf8Error::valid_up_to`]: http://doc.rust-lang.org/nightly/core/str/struct.Utf8Error.html#method.valid_up_to
4011 [`Vec::resize`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.resize
4012 [`VecDeque::as_mut_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_mut_slices
4013 [`VecDeque::as_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_slices
4014 [`VecDeque::insert`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.insert
4015 [`VecDeque::shrink_to_fit`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.shrink_to_fit
4016 [`VecDeque::swap_remove_back`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_back
4017 [`VecDeque::swap_remove_front`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_front
4018 [`slice::split_first_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first_mut
4019 [`slice::split_first`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first
4020 [`slice::split_last_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last_mut
4021 [`slice::split_last`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last
4022 [`char::from_u32_unchecked`]: http://doc.rust-lang.org/nightly/std/char/fn.from_u32_unchecked.html
4023 [`fs::canonicalize`]: http://doc.rust-lang.org/nightly/std/fs/fn.canonicalize.html
4024 [`str::MatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.MatchIndices.html
4025 [`str::RMatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.RMatchIndices.html
4026 [`str::match_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.match_indices
4027 [`str::rmatch_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatch_indices
4028 [`str::slice_mut_unchecked`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.slice_mut_unchecked
4029 [`string::ParseError`]: http://doc.rust-lang.org/nightly/std/string/enum.ParseError.html
4031 Version 1.4.0 (2015-10-29)
4032 ==========================
4034 * ~1200 changes, numerous bugfixes
4039 * Windows builds targeting the 64-bit MSVC ABI and linker (instead of
4040 GNU) are now supported and recommended for use.
4045 * [Several changes have been made to fix type soundness and improve
4046 the behavior of associated types][sound]. See [RFC 1214]. Although
4047 we have mostly introduced these changes as warnings this release, to
4048 become errors next release, there are still some scenarios that will
4049 see immediate breakage.
4050 * [The `str::lines` and `BufRead::lines` iterators treat `\r\n` as
4051 line breaks in addition to `\n`][crlf].
4052 * [Loans of `'static` lifetime extend to the end of a function][stat].
4053 * [`str::parse` no longer introduces avoidable rounding error when
4054 parsing floating point numbers. Together with earlier changes to
4055 float formatting/output, "round trips" like f.to_string().parse()
4056 now preserve the value of f exactly. Additionally, leading plus
4057 signs are now accepted][fp3].
4063 * `use` statements that import multiple items [can now rename
4064 them][i], as in `use foo::{bar as kitten, baz as puppy}`.
4065 * [Binops work correctly on fat pointers][binfat].
4066 * `pub extern crate`, which does not behave as expected, [issues a
4067 warning][pec] until a better solution is found.
4072 * [Many APIs were stabilized][stab]: `<Box<str>>::into_string`,
4073 [`Arc::downgrade`], [`Arc::get_mut`], [`Arc::make_mut`],
4074 [`Arc::try_unwrap`], [`Box::from_raw`], [`Box::into_raw`], [`CStr::to_str`],
4075 [`CStr::to_string_lossy`], [`CString::from_raw`], [`CString::into_raw`],
4076 [`IntoRawFd::into_raw_fd`], [`IntoRawFd`],
4077 `IntoRawHandle::into_raw_handle`, `IntoRawHandle`,
4078 `IntoRawSocket::into_raw_socket`, `IntoRawSocket`, [`Rc::downgrade`],
4079 [`Rc::get_mut`], [`Rc::make_mut`], [`Rc::try_unwrap`], [`Result::expect`],
4080 [`String::into_boxed_str`], [`TcpStream::read_timeout`],
4081 [`TcpStream::set_read_timeout`], [`TcpStream::set_write_timeout`],
4082 [`TcpStream::write_timeout`], [`UdpSocket::read_timeout`],
4083 [`UdpSocket::set_read_timeout`], [`UdpSocket::set_write_timeout`],
4084 [`UdpSocket::write_timeout`], `Vec::append`, `Vec::split_off`,
4085 [`VecDeque::append`], [`VecDeque::retain`], [`VecDeque::split_off`],
4086 [`rc::Weak::upgrade`], [`rc::Weak`], [`slice::Iter::as_slice`],
4087 [`slice::IterMut::into_slice`], [`str::CharIndices::as_str`],
4088 [`str::Chars::as_str`], [`str::split_at_mut`], [`str::split_at`],
4089 [`sync::Weak::upgrade`], [`sync::Weak`], [`thread::park_timeout`],
4091 * [Some APIs were deprecated][dep]: `BTreeMap::with_b`,
4092 `BTreeSet::with_b`, `Option::as_mut_slice`, `Option::as_slice`,
4093 `Result::as_mut_slice`, `Result::as_slice`, `f32::from_str_radix`,
4094 `f64::from_str_radix`.
4095 * [Reverse-searching strings is faster with the 'two-way'
4097 * [`std::io::copy` allows `?Sized` arguments][cc].
4098 * The `Windows`, `Chunks`, and `ChunksMut` iterators over slices all
4099 [override `count`, `nth` and `last` with an O(1)
4100 implementation][it].
4101 * [`Default` is implemented for arrays up to `[T; 32]`][d].
4102 * [`IntoRawFd` has been added to the Unix-specific prelude,
4103 `IntoRawSocket` and `IntoRawHandle` to the Windows-specific
4105 * [`Extend<String>` and `FromIterator<String` are both implemented for
4107 * [`IntoIterator` is implemented for references to `Option` and
4109 * [`HashMap` and `HashSet` implement `Extend<&T>` where `T:
4110 Copy`][ext] as part of [RFC 839]. This will cause type inference
4111 breakage in rare situations.
4112 * [`BinaryHeap` implements `Debug`][bh2].
4113 * [`Borrow` and `BorrowMut` are implemented for fixed-size
4115 * [`extern fn`s with the "Rust" and "C" ABIs implement common
4116 traits including `Eq`, `Ord`, `Debug`, `Hash`][fp].
4117 * [String comparison is faster][faststr].
4118 * `&mut T` where `T: std::fmt::Write` [also implements
4119 `std::fmt::Write`][mutw].
4120 * [A stable regression in `VecDeque::push_back` and other
4121 capacity-altering methods that caused panics for zero-sized types
4123 * [Function pointers implement traits for up to 12 parameters][fp2].
4128 * The compiler [no longer uses the 'morestack' feature to prevent
4129 stack overflow][mm]. Instead it uses guard pages and stack
4130 probes (though stack probes are not yet implemented on any platform
4132 * [The compiler matches traits faster when projections are involved][p].
4133 * The 'improper_ctypes' lint [no longer warns about use of `isize` and
4135 * [Cargo now displays useful information about what its doing during
4136 `cargo update`][cu].
4138 [`Arc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.downgrade
4139 [`Arc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.make_mut
4140 [`Arc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.get_mut
4141 [`Arc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.try_unwrap
4142 [`Box::from_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.from_raw
4143 [`Box::into_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.into_raw
4144 [`CStr::to_str`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_str
4145 [`CStr::to_string_lossy`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_string_lossy
4146 [`CString::from_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.from_raw
4147 [`CString::into_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_raw
4148 [`IntoRawFd::into_raw_fd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html#tymethod.into_raw_fd
4149 [`IntoRawFd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html
4150 [`Rc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.downgrade
4151 [`Rc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.get_mut
4152 [`Rc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.make_mut
4153 [`Rc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.try_unwrap
4154 [`Result::expect`]: http://doc.rust-lang.org/nightly/core/result/enum.Result.html#method.expect
4155 [`String::into_boxed_str`]: http://doc.rust-lang.org/nightly/collections/string/struct.String.html#method.into_boxed_str
4156 [`TcpStream::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
4157 [`TcpStream::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
4158 [`TcpStream::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
4159 [`TcpStream::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
4160 [`UdpSocket::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
4161 [`UdpSocket::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
4162 [`UdpSocket::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
4163 [`UdpSocket::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
4164 [`VecDeque::append`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.append
4165 [`VecDeque::retain`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.retain
4166 [`VecDeque::split_off`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.split_off
4167 [`rc::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html#method.upgrade
4168 [`rc::Weak`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html
4169 [`slice::Iter::as_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.Iter.html#method.as_slice
4170 [`slice::IterMut::into_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.IterMut.html#method.into_slice
4171 [`str::CharIndices::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.CharIndices.html#method.as_str
4172 [`str::Chars::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.Chars.html#method.as_str
4173 [`str::split_at_mut`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at_mut
4174 [`str::split_at`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at
4175 [`sync::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html#method.upgrade
4176 [`sync::Weak`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html
4177 [`thread::park_timeout`]: http://doc.rust-lang.org/nightly/std/thread/fn.park_timeout.html
4178 [`thread::sleep`]: http://doc.rust-lang.org/nightly/std/thread/fn.sleep.html
4179 [bh2]: https://github.com/rust-lang/rust/pull/28156
4180 [binfat]: https://github.com/rust-lang/rust/pull/28270
4181 [bm]: https://github.com/rust-lang/rust/pull/28197
4182 [cc]: https://github.com/rust-lang/rust/pull/27531
4183 [crlf]: https://github.com/rust-lang/rust/pull/28034
4184 [cu]: https://github.com/rust-lang/cargo/pull/1931
4185 [d]: https://github.com/rust-lang/rust/pull/27825
4186 [dep]: https://github.com/rust-lang/rust/pull/28339
4187 [es]: https://github.com/rust-lang/rust/pull/27956
4188 [ext]: https://github.com/rust-lang/rust/pull/28094
4189 [faststr]: https://github.com/rust-lang/rust/pull/28338
4190 [ffi]: https://github.com/rust-lang/rust/pull/28779
4191 [fp]: https://github.com/rust-lang/rust/pull/28268
4192 [fp2]: https://github.com/rust-lang/rust/pull/28560
4193 [fp3]: https://github.com/rust-lang/rust/pull/27307
4194 [i]: https://github.com/rust-lang/rust/pull/27451
4195 [into2]: https://github.com/rust-lang/rust/pull/28039
4196 [it]: https://github.com/rust-lang/rust/pull/27652
4197 [mm]: https://github.com/rust-lang/rust/pull/27338
4198 [mutw]: https://github.com/rust-lang/rust/pull/28368
4199 [sound]: https://github.com/rust-lang/rust/pull/27641
4200 [p]: https://github.com/rust-lang/rust/pull/27866
4201 [pec]: https://github.com/rust-lang/rust/pull/28486
4202 [pr]: https://github.com/rust-lang/rust/pull/27896
4203 [RFC 839]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
4204 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
4205 [s]: https://github.com/rust-lang/rust/pull/27474
4206 [stab]: https://github.com/rust-lang/rust/pull/28339
4207 [stat]: https://github.com/rust-lang/rust/pull/28321
4208 [vd]: https://github.com/rust-lang/rust/pull/28494
4210 Version 1.3.0 (2015-09-17)
4211 ==============================
4213 * ~900 changes, numerous bugfixes
4218 * The [new object lifetime defaults][nold] have been [turned
4219 on][nold2] after a cycle of warnings about the change. Now types
4220 like `&'a Box<Trait>` (or `&'a Rc<Trait>`, etc) will change from
4221 being interpreted as `&'a Box<Trait+'a>` to `&'a
4222 Box<Trait+'static>`.
4223 * [The Rustonomicon][nom] is a new book in the official documentation
4224 that dives into writing unsafe Rust.
4225 * The [`Duration`] API, [has been stabilized][ds]. This basic unit of
4226 timekeeping is employed by other std APIs, as well as out-of-tree
4232 * The [new object lifetime defaults][nold] have been [turned
4233 on][nold2] after a cycle of warnings about the change.
4234 * There is a known [regression][lr] in how object lifetime elision is
4235 interpreted, the proper solution for which is undetermined.
4236 * The `#[prelude_import]` attribute, an internal implementation
4237 detail, was accidentally stabilized previously. [It has been put
4238 behind the `prelude_import` feature gate][pi]. This change is
4239 believed to break no existing code.
4240 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
4241 [more sane for dynamically sized types][dst3]. Code that relied on
4242 the previous behavior is thought to be broken.
4243 * The `dropck` rules, which checks that destructors can't access
4244 destroyed values, [have been updated][dropck] to match the
4245 [RFC][dropckrfc]. This fixes some soundness holes, and as such will
4246 cause some previously-compiling code to no longer build.
4251 * The [new object lifetime defaults][nold] have been [turned
4252 on][nold2] after a cycle of warnings about the change.
4253 * Semicolons may [now follow types and paths in
4254 macros](https://github.com/rust-lang/rust/pull/27000).
4255 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
4256 [more sane for dynamically sized types][dst3]. Code that relied on
4257 the previous behavior is not known to exist, and suspected to be
4259 * `'static` variables [may now be recursive][st].
4260 * `ref` bindings choose between [`Deref`] and [`DerefMut`]
4261 implementations correctly.
4262 * The `dropck` rules, which checks that destructors can't access
4263 destroyed values, [have been updated][dropck] to match the
4269 * The [`Duration`] API, [has been stabilized][ds], as well as the
4270 `std::time` module, which presently contains only `Duration`.
4271 * `Box<str>` and `Box<[T]>` both implement `Clone`.
4272 * The owned C string, [`CString`], implements [`Borrow`] and the
4273 borrowed C string, [`CStr`], implements [`ToOwned`]. The two of
4274 these allow C strings to be borrowed and cloned in generic code.
4275 * [`CStr`] implements [`Debug`].
4276 * [`AtomicPtr`] implements [`Debug`].
4277 * [`Error`] trait objects [can be downcast to their concrete types][e]
4278 in many common configurations, using the [`is`], [`downcast`],
4279 [`downcast_ref`] and [`downcast_mut`] methods, similarly to the
4281 * Searching for substrings now [employs the two-way algorithm][search]
4282 instead of doing a naive search. This gives major speedups to a
4283 number of methods, including [`contains`][sc], [`find`][sf],
4284 [`rfind`][srf], [`split`][ss]. [`starts_with`][ssw] and
4285 [`ends_with`][sew] are also faster.
4286 * The performance of `PartialEq` for slices is [much faster][ps].
4287 * The [`Hash`] trait offers the default method, [`hash_slice`], which
4288 is overridden and optimized by the implementations for scalars.
4289 * The [`Hasher`] trait now has a number of specialized `write_*`
4290 methods for primitive types, for efficiency.
4291 * The I/O-specific error type, [`std::io::Error`][ie], gained a set of
4292 methods for accessing the 'inner error', if any: [`get_ref`][iegr],
4293 [`get_mut`][iegm], [`into_inner`][ieii]. As well, the implementation
4294 of [`std::error::Error::cause`][iec] also delegates to the inner
4296 * [`process::Child`][pc] gained the [`id`] method, which returns a
4297 `u32` representing the platform-specific process identifier.
4298 * The [`connect`] method on slices is deprecated, replaced by the new
4299 [`join`] method (note that both of these are on the *unstable*
4300 [`SliceConcatExt`] trait, but through the magic of the prelude are
4301 available to stable code anyway).
4302 * The [`Div`] operator is implemented for [`Wrapping`] types.
4303 * [`DerefMut` is implemented for `String`][dms].
4304 * Performance of SipHash (the default hasher for `HashMap`) is
4305 [better for long data][sh].
4306 * [`AtomicPtr`] implements [`Send`].
4307 * The [`read_to_end`] implementations for [`Stdin`] and [`File`]
4308 are now [specialized to use uninitialized buffers for increased
4310 * Lifetime parameters of foreign functions [are now resolved
4316 * Rust can now, with some coercion, [produce programs that run on
4317 Windows XP][xp], though XP is not considered a supported platform.
4318 * Porting Rust on Windows from the GNU toolchain to MSVC continues
4319 ([1][win1], [2][win2], [3][win3], [4][win4]). It is still not
4320 recommended for use in 1.3, though should be fully-functional
4321 in the [64-bit 1.4 beta][b14].
4322 * On Fedora-based systems installation will [properly configure the
4323 dynamic linker][fl].
4324 * The compiler gained many new extended error descriptions, which can
4325 be accessed with the `--explain` flag.
4326 * The `dropck` pass, which checks that destructors can't access
4327 destroyed values, [has been rewritten][dropck]. This fixes some
4328 soundness holes, and as such will cause some previously-compiling
4329 code to no longer build.
4330 * `rustc` now uses [LLVM to write archive files where possible][ar].
4331 Eventually this will eliminate the compiler's dependency on the ar
4333 * Rust has [preliminary support for i686 FreeBSD][fb] (it has long
4334 supported FreeBSD on x86_64).
4335 * The [`unused_mut`][lum], [`unconditional_recursion`][lur],
4336 [`improper_ctypes`][lic], and [`negate_unsigned`][lnu] lints are
4338 * If landing pads are disabled (with `-Z no-landing-pads`), [`panic!`
4339 will kill the process instead of leaking][nlp].
4341 [`Any`]: http://doc.rust-lang.org/nightly/std/any/trait.Any.html
4342 [`AtomicPtr`]: http://doc.rust-lang.org/nightly/std/sync/atomic/struct.AtomicPtr.html
4343 [`Borrow`]: http://doc.rust-lang.org/nightly/std/borrow/trait.Borrow.html
4344 [`CStr`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html
4345 [`CString`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html
4346 [`Debug`]: http://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
4347 [`DerefMut`]: http://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
4348 [`Deref`]: http://doc.rust-lang.org/nightly/std/ops/trait.Deref.html
4349 [`Div`]: http://doc.rust-lang.org/nightly/std/ops/trait.Div.html
4350 [`Duration`]: http://doc.rust-lang.org/nightly/std/time/struct.Duration.html
4351 [`Error`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html
4352 [`File`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html
4353 [`Hash`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html
4354 [`Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
4355 [`Send`]: http://doc.rust-lang.org/nightly/std/marker/trait.Send.html
4356 [`SliceConcatExt`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html
4357 [`Stdin`]: http://doc.rust-lang.org/nightly/std/io/struct.Stdin.html
4358 [`ToOwned`]: http://doc.rust-lang.org/nightly/std/borrow/trait.ToOwned.html
4359 [`Wrapping`]: http://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
4360 [`connect`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.connect
4361 [`downcast_mut`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_mut
4362 [`downcast_ref`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_ref
4363 [`downcast`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast
4364 [`hash_slice`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
4365 [`id`]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html#method.id
4366 [`is`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.is
4367 [`join`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.join
4368 [`read_to_end`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_to_end
4369 [ar]: https://github.com/rust-lang/rust/pull/26926
4370 [b14]: https://static.rust-lang.org/dist/rust-beta-x86_64-pc-windows-msvc.msi
4371 [dms]: https://github.com/rust-lang/rust/pull/26241
4372 [dropck]: https://github.com/rust-lang/rust/pull/27261
4373 [dropckrfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
4374 [ds]: https://github.com/rust-lang/rust/pull/26818
4375 [dst1]: http://doc.rust-lang.org/nightly/std/mem/fn.size_of_val.html
4376 [dst2]: http://doc.rust-lang.org/nightly/std/mem/fn.align_of_val.html
4377 [dst3]: https://github.com/rust-lang/rust/pull/27351
4378 [e]: https://github.com/rust-lang/rust/pull/24793
4379 [f]: https://github.com/rust-lang/rust/pull/26588
4380 [fb]: https://github.com/rust-lang/rust/pull/26959
4381 [fl]: https://github.com/rust-lang/rust-installer/pull/41
4382 [hs]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
4383 [ie]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html
4384 [iec]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.cause
4385 [iegm]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_mut
4386 [iegr]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_ref
4387 [ieii]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.into_inner
4388 [lic]: https://github.com/rust-lang/rust/pull/26583
4389 [lnu]: https://github.com/rust-lang/rust/pull/27026
4390 [lr]: https://github.com/rust-lang/rust/issues/27248
4391 [lum]: https://github.com/rust-lang/rust/pull/26378
4392 [lur]: https://github.com/rust-lang/rust/pull/26783
4393 [nlp]: https://github.com/rust-lang/rust/pull/27176
4394 [nold2]: https://github.com/rust-lang/rust/pull/27045
4395 [nold]: https://github.com/rust-lang/rfcs/blob/master/text/1156-adjust-default-object-bounds.md
4396 [nom]: http://doc.rust-lang.org/nightly/nomicon/
4397 [pc]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html
4398 [pi]: https://github.com/rust-lang/rust/pull/26699
4399 [ps]: https://github.com/rust-lang/rust/pull/26884
4400 [rte]: https://github.com/rust-lang/rust/pull/26950
4401 [sc]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.contains
4402 [search]: https://github.com/rust-lang/rust/pull/26327
4403 [sew]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.ends_with
4404 [sf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.find
4405 [sh]: https://github.com/rust-lang/rust/pull/27280
4406 [srf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rfind
4407 [ss]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split
4408 [ssw]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.starts_with
4409 [st]: https://github.com/rust-lang/rust/pull/26630
4410 [win1]: https://github.com/rust-lang/rust/pull/26569
4411 [win2]: https://github.com/rust-lang/rust/pull/26741
4412 [win3]: https://github.com/rust-lang/rust/pull/26741
4413 [win4]: https://github.com/rust-lang/rust/pull/27210
4414 [xp]: https://github.com/rust-lang/rust/pull/26569
4416 Version 1.2.0 (2015-08-07)
4417 ==========================
4419 * ~1200 changes, numerous bugfixes
4424 * [Dynamically-sized-type coercions][dst] allow smart pointer types
4425 like `Rc` to contain types without a fixed size, arrays and trait
4426 objects, finally enabling use of `Rc<[T]>` and completing the
4427 implementation of DST.
4428 * [Parallel codegen][parcodegen] is now working again, which can
4429 substantially speed up large builds in debug mode; It also gets
4430 another ~33% speedup when bootstrapping on a 4 core machine (using 8
4431 jobs). It's not enabled by default, but will be "in the near
4432 future". It can be activated with the `-C codegen-units=N` flag to
4434 * This is the first release with [experimental support for linking
4435 with the MSVC linker and lib C on Windows (instead of using the GNU
4436 variants via MinGW)][win]. It is yet recommended only for the most
4437 intrepid Rustaceans.
4438 * Benchmark compilations are showing a 30% improvement in
4439 bootstrapping over 1.1.
4444 * The [`to_uppercase`] and [`to_lowercase`] methods on `char` now do
4445 unicode case mapping, which is a previously-planned change in
4446 behavior and considered a bugfix.
4447 * [`mem::align_of`] now specifies [the *minimum alignment* for
4448 T][align], which is usually the alignment programs are interested
4449 in, and the same value reported by clang's
4450 `alignof`. [`mem::min_align_of`] is deprecated. This is not known to
4452 * [The `#[packed]` attribute is no longer silently accepted by the
4453 compiler][packed]. This attribute did nothing and code that
4454 mentioned it likely did not work as intended.
4455 * Associated type defaults are [now behind the
4456 `associated_type_defaults` feature gate][ad]. In 1.1 associated type
4457 defaults *did not work*, but could be mentioned syntactically. As
4458 such this breakage has minimal impact.
4463 * Patterns with `ref mut` now correctly invoke [`DerefMut`] when
4464 matching against dereferencable values.
4469 * The [`Extend`] trait, which grows a collection from an iterator, is
4470 implemented over iterators of references, for `String`, `Vec`,
4471 `LinkedList`, `VecDeque`, `EnumSet`, `BinaryHeap`, `VecMap`,
4472 `BTreeSet` and `BTreeMap`. [RFC][extend-rfc].
4473 * The [`iter::once`] function returns an iterator that yields a single
4474 element, and [`iter::empty`] returns an iterator that yields no
4476 * The [`matches`] and [`rmatches`] methods on `str` return iterators
4477 over substring matches.
4478 * [`Cell`] and [`RefCell`] both implement `Eq`.
4479 * A number of methods for wrapping arithmetic are added to the
4480 integral types, [`wrapping_div`], [`wrapping_rem`],
4481 [`wrapping_neg`], [`wrapping_shl`], [`wrapping_shr`]. These are in
4482 addition to the existing [`wrapping_add`], [`wrapping_sub`], and
4483 [`wrapping_mul`] methods, and alternatives to the [`Wrapping`]
4484 type.. It is illegal for the default arithmetic operations in Rust
4485 to overflow; the desire to wrap must be explicit.
4486 * The `{:#?}` formatting specifier [displays the alternate,
4487 pretty-printed][debugfmt] form of the `Debug` formatter. This
4488 feature was actually introduced prior to 1.0 with little
4490 * [`fmt::Formatter`] implements [`fmt::Write`], a `fmt`-specific trait
4491 for writing data to formatted strings, similar to [`io::Write`].
4492 * [`fmt::Formatter`] adds 'debug builder' methods, [`debug_struct`],
4493 [`debug_tuple`], [`debug_list`], [`debug_set`], [`debug_map`]. These
4494 are used by code generators to emit implementations of [`Debug`].
4495 * `str` has new [`to_uppercase`][strup] and [`to_lowercase`][strlow]
4496 methods that convert case, following Unicode case mapping.
4497 * It is now easier to handle poisoned locks. The [`PoisonError`]
4498 type, returned by failing lock operations, exposes `into_inner`,
4499 `get_ref`, and `get_mut`, which all give access to the inner lock
4500 guard, and allow the poisoned lock to continue to operate. The
4501 `is_poisoned` method of [`RwLock`] and [`Mutex`] can poll for a
4502 poisoned lock without attempting to take the lock.
4503 * On Unix the [`FromRawFd`] trait is implemented for [`Stdio`], and
4504 [`AsRawFd`] for [`ChildStdin`], [`ChildStdout`], [`ChildStderr`].
4505 On Windows the `FromRawHandle` trait is implemented for `Stdio`,
4506 and `AsRawHandle` for `ChildStdin`, `ChildStdout`,
4508 * [`io::ErrorKind`] has a new variant, `InvalidData`, which indicates
4514 * `rustc` employs smarter heuristics for guessing at [typos].
4515 * `rustc` emits more efficient code for [no-op conversions between
4516 unsafe pointers][nop].
4517 * Fat pointers are now [passed in pairs of immediate arguments][fat],
4518 resulting in faster compile times and smaller code.
4520 [`Extend`]: https://doc.rust-lang.org/nightly/std/iter/trait.Extend.html
4521 [extend-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
4522 [`iter::once`]: https://doc.rust-lang.org/nightly/std/iter/fn.once.html
4523 [`iter::empty`]: https://doc.rust-lang.org/nightly/std/iter/fn.empty.html
4524 [`matches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.matches
4525 [`rmatches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatches
4526 [`Cell`]: https://doc.rust-lang.org/nightly/std/cell/struct.Cell.html
4527 [`RefCell`]: https://doc.rust-lang.org/nightly/std/cell/struct.RefCell.html
4528 [`wrapping_add`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_add
4529 [`wrapping_sub`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_sub
4530 [`wrapping_mul`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_mul
4531 [`wrapping_div`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_div
4532 [`wrapping_rem`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_rem
4533 [`wrapping_neg`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_neg
4534 [`wrapping_shl`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shl
4535 [`wrapping_shr`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shr
4536 [`Wrapping`]: https://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
4537 [`fmt::Formatter`]: https://doc.rust-lang.org/nightly/std/fmt/struct.Formatter.html
4538 [`fmt::Write`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Write.html
4539 [`io::Write`]: https://doc.rust-lang.org/nightly/std/io/trait.Write.html
4540 [`debug_struct`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_struct
4541 [`debug_tuple`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_tuple
4542 [`debug_list`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_list
4543 [`debug_set`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_set
4544 [`debug_map`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_map
4545 [`Debug`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
4546 [strup]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_uppercase
4547 [strlow]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_lowercase
4548 [`to_uppercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_uppercase
4549 [`to_lowercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_lowercase
4550 [`PoisonError`]: https://doc.rust-lang.org/nightly/std/sync/struct.PoisonError.html
4551 [`RwLock`]: https://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html
4552 [`Mutex`]: https://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html
4553 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
4554 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
4555 [`Stdio`]: https://doc.rust-lang.org/nightly/std/process/struct.Stdio.html
4556 [`ChildStdin`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdin.html
4557 [`ChildStdout`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdout.html
4558 [`ChildStderr`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStderr.html
4559 [`io::ErrorKind`]: https://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html
4560 [debugfmt]: https://www.reddit.com/r/rust/comments/3ceaui/psa_produces_prettyprinted_debug_output/
4561 [`DerefMut`]: https://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
4562 [`mem::align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.align_of.html
4563 [align]: https://github.com/rust-lang/rust/pull/25646
4564 [`mem::min_align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.min_align_of.html
4565 [typos]: https://github.com/rust-lang/rust/pull/26087
4566 [nop]: https://github.com/rust-lang/rust/pull/26336
4567 [fat]: https://github.com/rust-lang/rust/pull/26411
4568 [dst]: https://github.com/rust-lang/rfcs/blob/master/text/0982-dst-coercion.md
4569 [parcodegen]: https://github.com/rust-lang/rust/pull/26018
4570 [packed]: https://github.com/rust-lang/rust/pull/25541
4571 [ad]: https://github.com/rust-lang/rust/pull/27382
4572 [win]: https://github.com/rust-lang/rust/pull/25350
4574 Version 1.1.0 (2015-06-25)
4575 =========================
4577 * ~850 changes, numerous bugfixes
4582 * The [`std::fs` module has been expanded][fs] to expand the set of
4583 functionality exposed:
4584 * `DirEntry` now supports optimizations like `file_type` and `metadata` which
4585 don't incur a syscall on some platforms.
4586 * A `symlink_metadata` function has been added.
4587 * The `fs::Metadata` structure now lowers to its OS counterpart, providing
4588 access to all underlying information.
4589 * The compiler now contains extended explanations of many errors. When an error
4590 with an explanation occurs the compiler suggests using the `--explain` flag
4591 to read the explanation. Error explanations are also [available online][err-index].
4592 * Thanks to multiple [improvements][sk] to [type checking][pre], as
4593 well as other work, the time to bootstrap the compiler decreased by
4599 * The [`str::split_whitespace`] method splits a string on unicode
4600 whitespace boundaries.
4601 * On both Windows and Unix, new extension traits provide conversion of
4602 I/O types to and from the underlying system handles. On Unix, these
4603 traits are [`FromRawFd`] and [`AsRawFd`], on Windows `FromRawHandle`
4604 and `AsRawHandle`. These are implemented for `File`, `TcpStream`,
4605 `TcpListener`, and `UpdSocket`. Further implementations for
4606 `std::process` will be stabilized later.
4607 * On Unix, [`std::os::unix::symlink`] creates symlinks. On
4608 Windows, symlinks can be created with
4609 `std::os::windows::symlink_dir` and
4610 `std::os::windows::symlink_file`.
4611 * The `mpsc::Receiver` type can now be converted into an iterator with
4612 `into_iter` on the [`IntoIterator`] trait.
4613 * `Ipv4Addr` can be created from `u32` with the `From<u32>`
4614 implementation of the [`From`] trait.
4615 * The `Debug` implementation for `RangeFull` [creates output that is
4616 more consistent with other implementations][rf].
4617 * [`Debug` is implemented for `File`][file].
4618 * The `Default` implementation for `Arc` [no longer requires `Sync +
4620 * [The `Iterator` methods `count`, `nth`, and `last` have been
4621 overridden for slices to have O(1) performance instead of O(n)][si].
4622 * Incorrect handling of paths on Windows has been improved in both the
4623 compiler and the standard library.
4624 * [`AtomicPtr` gained a `Default` implementation][ap].
4625 * In accordance with Rust's policy on arithmetic overflow `abs` now
4626 [panics on overflow when debug assertions are enabled][abs].
4627 * The [`Cloned`] iterator, which was accidentally left unstable for
4628 1.0 [has been stabilized][c].
4629 * The [`Incoming`] iterator, which iterates over incoming TCP
4630 connections, and which was accidentally unnamable in 1.0, [is now
4631 properly exported][inc].
4632 * [`BinaryHeap`] no longer corrupts itself [when functions called by
4633 `sift_up` or `sift_down` panic][bh].
4634 * The [`split_off`] method of `LinkedList` [no longer corrupts
4635 the list in certain scenarios][ll].
4640 * Type checking performance [has improved notably][sk] with
4641 [multiple improvements][pre].
4642 * The compiler [suggests code changes][ch] for more errors.
4643 * rustc and it's build system have experimental support for [building
4644 toolchains against MUSL][m] instead of glibc on Linux.
4645 * The compiler defines the `target_env` cfg value, which is used for
4646 distinguishing toolchains that are otherwise for the same
4647 platform. Presently this is set to `gnu` for common GNU Linux
4648 targets and for MinGW targets, and `musl` for MUSL Linux targets.
4649 * The [`cargo rustc`][crc] command invokes a build with custom flags
4651 * [Android executables are always position independent][pie].
4652 * [The `drop_with_repr_extern` lint warns about mixing `repr(C)`
4655 [`str::split_whitespace`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_whitespace
4656 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
4657 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
4658 [`std::os::unix::symlink`]: https://doc.rust-lang.org/nightly/std/os/unix/fs/fn.symlink.html
4659 [`IntoIterator`]: https://doc.rust-lang.org/nightly/std/iter/trait.IntoIterator.html
4660 [`From`]: https://doc.rust-lang.org/nightly/std/convert/trait.From.html
4661 [rf]: https://github.com/rust-lang/rust/pull/24491
4662 [err-index]: https://doc.rust-lang.org/error-index.html
4663 [sk]: https://github.com/rust-lang/rust/pull/24615
4664 [pre]: https://github.com/rust-lang/rust/pull/25323
4665 [file]: https://github.com/rust-lang/rust/pull/24598
4666 [ch]: https://github.com/rust-lang/rust/pull/24683
4667 [arc]: https://github.com/rust-lang/rust/pull/24695
4668 [si]: https://github.com/rust-lang/rust/pull/24701
4669 [ap]: https://github.com/rust-lang/rust/pull/24834
4670 [m]: https://github.com/rust-lang/rust/pull/24777
4671 [fs]: https://github.com/rust-lang/rfcs/blob/master/text/1044-io-fs-2.1.md
4672 [crc]: https://github.com/rust-lang/cargo/pull/1568
4673 [pie]: https://github.com/rust-lang/rust/pull/24953
4674 [abs]: https://github.com/rust-lang/rust/pull/25441
4675 [c]: https://github.com/rust-lang/rust/pull/25496
4676 [`Cloned`]: https://doc.rust-lang.org/nightly/std/iter/struct.Cloned.html
4677 [`Incoming`]: https://doc.rust-lang.org/nightly/std/net/struct.Incoming.html
4678 [inc]: https://github.com/rust-lang/rust/pull/25522
4679 [bh]: https://github.com/rust-lang/rust/pull/25856
4680 [`BinaryHeap`]: https://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html
4681 [ll]: https://github.com/rust-lang/rust/pull/26022
4682 [`split_off`]: https://doc.rust-lang.org/nightly/collections/linked_list/struct.LinkedList.html#method.split_off
4683 [drop]: https://github.com/rust-lang/rust/pull/24935
4685 Version 1.0.0 (2015-05-15)
4686 ========================
4688 * ~1500 changes, numerous bugfixes
4693 * The vast majority of the standard library is now `#[stable]`. It is
4694 no longer possible to use unstable features with a stable build of
4696 * Many popular crates on [crates.io] now work on the stable release
4698 * Arithmetic on basic integer types now [checks for overflow in debug
4704 * Several [restrictions have been added to trait coherence][coh] in
4705 order to make it easier for upstream authors to change traits
4706 without breaking downstream code.
4707 * Digits of binary and octal literals are [lexed more eagerly][lex] to
4708 improve error messages and macro behavior. For example, `0b1234` is
4709 now lexed as `0b1234` instead of two tokens, `0b1` and `234`.
4710 * Trait bounds [are always invariant][inv], eliminating the need for
4711 the `PhantomFn` and `MarkerTrait` lang items, which have been
4713 * ["-" is no longer a valid character in crate names][cr], the `extern crate
4714 "foo" as bar` syntax has been replaced with `extern crate foo as
4715 bar`, and Cargo now automatically translates "-" in *package* names
4716 to underscore for the crate name.
4717 * [Lifetime shadowing is an error][lt].
4718 * [`Send` no longer implies `'static`][send-rfc].
4719 * [UFCS now supports trait-less associated paths][moar-ufcs] like
4720 `MyType::default()`.
4721 * Primitive types [now have inherent methods][prim-inherent],
4722 obviating the need for extension traits like `SliceExt`.
4723 * Methods with `Self: Sized` in their `where` clause are [considered
4724 object-safe][self-sized], allowing many extension traits like
4725 `IteratorExt` to be merged into the traits they extended.
4726 * You can now [refer to associated types][assoc-where] whose
4727 corresponding trait bounds appear only in a `where` clause.
4728 * The final bits of [OIBIT landed][oibit-final], meaning that traits
4729 like `Send` and `Sync` are now library-defined.
4730 * A [Reflect trait][reflect] was introduced, which means that
4731 downcasting via the `Any` trait is effectively limited to concrete
4732 types. This helps retain the potentially-important "parametricity"
4733 property: generic code cannot behave differently for different type
4734 arguments except in minor ways.
4735 * The `unsafe_destructor` feature is now deprecated in favor of the
4736 [new `dropck`][dropck]. This change is a major reduction in unsafe
4742 * The `thread_local` module [has been renamed to `std::thread`][th].
4743 * The methods of `IteratorExt` [have been moved to the `Iterator`
4745 * Several traits that implement Rust's conventions for type
4746 conversions, `AsMut`, `AsRef`, `From`, and `Into` have been
4747 [centralized in the `std::convert` module][con].
4748 * The `FromError` trait [was removed in favor of `From`][fe].
4749 * The basic sleep function [has moved to
4750 `std::thread::sleep_ms`][slp].
4751 * The `splitn` function now takes an `n` parameter that represents the
4752 number of items yielded by the returned iterator [instead of the
4753 number of 'splits'][spl].
4754 * [On Unix, all file descriptors are `CLOEXEC` by default][clo].
4755 * [Derived implementations of `PartialOrd` now order enums according
4756 to their explicitly-assigned discriminants][po].
4757 * [Methods for searching strings are generic over `Pattern`s][pat],
4758 implemented presently by `&char`, `&str`, `FnMut(char) -> bool` and
4760 * [In method resolution, object methods are resolved before inherent
4762 * [`String::from_str` has been deprecated in favor of the `From` impl,
4763 `String::from`][sf].
4764 * [`io::Error` implements `Sync`][ios].
4765 * [The `words` method on `&str` has been replaced with
4766 `split_whitespace`][sw], to avoid answering the tricky question, 'what is
4768 * The new path and IO modules are complete and `#[stable]`. This
4769 was the major library focus for this cycle.
4770 * The path API was [revised][path-normalize] to normalize `.`,
4771 adjusting the tradeoffs in favor of the most common usage.
4772 * A large number of remaining APIs in `std` were also stabilized
4773 during this cycle; about 75% of the non-deprecated API surface
4775 * The new [string pattern API][string-pattern] landed, which makes
4776 the string slice API much more internally consistent and flexible.
4777 * A new set of [generic conversion traits][conversion] replaced
4778 many existing ad hoc traits.
4779 * Generic numeric traits were [completely removed][num-traits]. This
4780 was made possible thanks to inherent methods for primitive types,
4781 and the removal gives maximal flexibility for designing a numeric
4782 hierarchy in the future.
4783 * The `Fn` traits are now related via [inheritance][fn-inherit]
4784 and provide ergonomic [blanket implementations][fn-blanket].
4785 * The `Index` and `IndexMut` traits were changed to
4786 [take the index by value][index-value], enabling code like
4787 `hash_map["string"]` to work.
4788 * `Copy` now [inherits][copy-clone] from `Clone`, meaning that all
4789 `Copy` data is known to be `Clone` as well.
4794 * Many errors now have extended explanations that can be accessed with
4795 the `--explain` flag to `rustc`.
4796 * Many new examples have been added to the standard library
4798 * rustdoc has received a number of improvements focused on completion
4800 * Metadata was tuned, shrinking binaries [by 27%][metadata-shrink].
4801 * Much headway was made on ecosystem-wide CI, making it possible
4802 to [compare builds for breakage][ci-compare].
4805 [crates.io]: http://crates.io
4806 [clo]: https://github.com/rust-lang/rust/pull/24034
4807 [coh]: https://github.com/rust-lang/rfcs/blob/master/text/1023-rebalancing-coherence.md
4808 [con]: https://github.com/rust-lang/rust/pull/23875
4809 [cr]: https://github.com/rust-lang/rust/pull/23419
4810 [fe]: https://github.com/rust-lang/rust/pull/23879
4811 [ie]: https://github.com/rust-lang/rust/pull/23300
4812 [inv]: https://github.com/rust-lang/rust/pull/23938
4813 [ios]: https://github.com/rust-lang/rust/pull/24133
4814 [lex]: https://github.com/rust-lang/rfcs/blob/master/text/0879-small-base-lexing.md
4815 [lt]: https://github.com/rust-lang/rust/pull/24057
4816 [meth]: https://github.com/rust-lang/rust/pull/24056
4817 [pat]: https://github.com/rust-lang/rfcs/blob/master/text/0528-string-patterns.md
4818 [po]: https://github.com/rust-lang/rust/pull/24270
4819 [sf]: https://github.com/rust-lang/rust/pull/24517
4820 [slp]: https://github.com/rust-lang/rust/pull/23949
4821 [spl]: https://github.com/rust-lang/rfcs/blob/master/text/0979-align-splitn-with-other-languages.md
4822 [sw]: https://github.com/rust-lang/rfcs/blob/master/text/1054-str-words.md
4823 [th]: https://github.com/rust-lang/rfcs/blob/master/text/0909-move-thread-local-to-std-thread.md
4824 [send-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0458-send-improvements.md
4825 [moar-ufcs]: https://github.com/rust-lang/rust/pull/22172
4826 [prim-inherent]: https://github.com/rust-lang/rust/pull/23104
4827 [overflow]: https://github.com/rust-lang/rfcs/blob/master/text/0560-integer-overflow.md
4828 [metadata-shrink]: https://github.com/rust-lang/rust/pull/22971
4829 [self-sized]: https://github.com/rust-lang/rust/pull/22301
4830 [assoc-where]: https://github.com/rust-lang/rust/pull/22512
4831 [string-pattern]: https://github.com/rust-lang/rust/pull/22466
4832 [oibit-final]: https://github.com/rust-lang/rust/pull/21689
4833 [reflect]: https://github.com/rust-lang/rust/pull/23712
4834 [conversion]: https://github.com/rust-lang/rfcs/pull/529
4835 [num-traits]: https://github.com/rust-lang/rust/pull/23549
4836 [index-value]: https://github.com/rust-lang/rust/pull/23601
4837 [dropck]: https://github.com/rust-lang/rfcs/pull/769
4838 [ci-compare]: https://gist.github.com/brson/a30a77836fbec057cbee
4839 [fn-inherit]: https://github.com/rust-lang/rust/pull/23282
4840 [fn-blanket]: https://github.com/rust-lang/rust/pull/23895
4841 [copy-clone]: https://github.com/rust-lang/rust/pull/23860
4842 [path-normalize]: https://github.com/rust-lang/rust/pull/23229
4845 Version 1.0.0-alpha.2 (2015-02-20)
4846 =====================================
4848 * ~1300 changes, numerous bugfixes
4852 * The various I/O modules were [overhauled][io-rfc] to reduce
4853 unnecessary abstractions and provide better interoperation with
4854 the underlying platform. The old `io` module remains temporarily
4856 * The standard library now [participates in feature gating][feat],
4857 so use of unstable libraries now requires a `#![feature(...)]`
4858 attribute. The impact of this change is [described on the
4859 forum][feat-forum]. [RFC][feat-rfc].
4863 * `for` loops [now operate on the `IntoIterator` trait][into],
4864 which eliminates the need to call `.iter()`, etc. to iterate
4865 over collections. There are some new subtleties to remember
4866 though regarding what sort of iterators various types yield, in
4867 particular that `for foo in bar { }` yields values from a move
4868 iterator, destroying the original collection. [RFC][into-rfc].
4869 * Objects now have [default lifetime bounds][obj], so you don't
4870 have to write `Box<Trait+'static>` when you don't care about
4871 storing references. [RFC][obj-rfc].
4872 * In types that implement `Drop`, [lifetimes must outlive the
4873 value][drop]. This will soon make it possible to safely
4874 implement `Drop` for types where `#[unsafe_destructor]` is now
4875 required. Read the [gorgeous RFC][drop-rfc] for details.
4876 * The fully qualified <T as Trait>::X syntax lets you set the Self
4877 type for a trait method or associated type. [RFC][ufcs-rfc].
4878 * References to types that implement `Deref<U>` now [automatically
4879 coerce to references][deref] to the dereferenced type `U`,
4880 e.g. `&T where T: Deref<U>` automatically coerces to `&U`. This
4881 should eliminate many unsightly uses of `&*`, as when converting
4882 from references to vectors into references to
4883 slices. [RFC][deref-rfc].
4884 * The explicit [closure kind syntax][close] (`|&:|`, `|&mut:|`,
4885 `|:|`) is obsolete and closure kind is inferred from context.
4886 * [`Self` is a keyword][Self].
4890 * The `Show` and `String` formatting traits [have been
4891 renamed][fmt] to `Debug` and `Display` to more clearly reflect
4892 their related purposes. Automatically getting a string
4893 conversion to use with `format!("{:?}", something_to_debug)` is
4894 now written `#[derive(Debug)]`.
4895 * Abstract [OS-specific string types][osstr], `std::ff::{OsString,
4896 OsStr}`, provide strings in platform-specific encodings for easier
4897 interop with system APIs. [RFC][osstr-rfc].
4898 * The `boxed::into_raw` and `Box::from_raw` functions [convert
4899 between `Box<T>` and `*mut T`][boxraw], a common pattern for
4900 creating raw pointers.
4904 * Certain long error messages of the form 'expected foo found bar'
4905 are now [split neatly across multiple
4906 lines][multiline]. Examples in the PR.
4907 * On Unix Rust can be [uninstalled][un] by running
4908 `/usr/local/lib/rustlib/uninstall.sh`.
4909 * The `#[rustc_on_unimplemented]` attribute, requiring the
4910 'on_unimplemented' feature, lets rustc [display custom error
4911 messages when a trait is expected to be implemented for a type
4916 * Rust is tested against a [LALR grammar][lalr], which parses
4917 almost all the Rust files that rustc does.
4919 [boxraw]: https://github.com/rust-lang/rust/pull/21318
4920 [close]: https://github.com/rust-lang/rust/pull/21843
4921 [deref]: https://github.com/rust-lang/rust/pull/21351
4922 [deref-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0241-deref-conversions.md
4923 [drop]: https://github.com/rust-lang/rust/pull/21972
4924 [drop-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
4925 [feat]: https://github.com/rust-lang/rust/pull/21248
4926 [feat-forum]: https://users.rust-lang.org/t/psa-important-info-about-rustcs-new-feature-staging/82/5
4927 [feat-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0507-release-channels.md
4928 [fmt]: https://github.com/rust-lang/rust/pull/21457
4929 [into]: https://github.com/rust-lang/rust/pull/20790
4930 [into-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md#intoiterator-and-iterable
4931 [io-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
4932 [lalr]: https://github.com/rust-lang/rust/pull/21452
4933 [multiline]: https://github.com/rust-lang/rust/pull/19870
4934 [obj]: https://github.com/rust-lang/rust/pull/22230
4935 [obj-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0599-default-object-bound.md
4936 [onun]: https://github.com/rust-lang/rust/pull/20889
4937 [osstr]: https://github.com/rust-lang/rust/pull/21488
4938 [osstr-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
4939 [Self]: https://github.com/rust-lang/rust/pull/22158
4940 [ufcs-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0132-ufcs.md
4941 [un]: https://github.com/rust-lang/rust/pull/22256
4944 Version 1.0.0-alpha (2015-01-09)
4945 ==================================
4947 * ~2400 changes, numerous bugfixes
4951 * The language itself is considered feature complete for 1.0,
4952 though there will be many usability improvements and bugfixes
4953 before the final release.
4954 * Nearly 50% of the public API surface of the standard library has
4955 been declared 'stable'. Those interfaces are unlikely to change
4957 * The long-running debate over integer types has been
4958 [settled][ints]: Rust will ship with types named `isize` and
4959 `usize`, rather than `int` and `uint`, for pointer-sized
4960 integers. Guidelines will be rolled out during the alpha cycle.
4961 * Most crates that are not `std` have been moved out of the Rust
4962 distribution into the Cargo ecosystem so they can evolve
4963 separately and don't need to be stabilized as quickly, including
4964 'time', 'getopts', 'num', 'regex', and 'term'.
4965 * Documentation continues to be expanded with more API coverage, more
4966 examples, and more in-depth explanations. The guides have been
4967 consolidated into [The Rust Programming Language][trpl].
4968 * "[Rust By Example][rbe]" is now maintained by the Rust team.
4969 * All official Rust binary installers now come with [Cargo], the
4970 Rust package manager.
4974 * Closures have been [completely redesigned][unboxed] to be
4975 implemented in terms of traits, can now be used as generic type
4976 bounds and thus monomorphized and inlined, or via an opaque
4977 pointer (boxed) as in the old system. The new system is often
4978 referred to as 'unboxed' closures.
4979 * Traits now support [associated types][assoc], allowing families
4980 of related types to be defined together and used generically in
4982 * Enum variants are [namespaced by their type names][enum].
4983 * [`where` clauses][where] provide a more versatile and attractive
4984 syntax for specifying generic bounds, though the previous syntax
4986 * Rust again picks a [fallback][fb] (either i32 or f64) for uninferred
4988 * Rust [no longer has a runtime][rt] of any description, and only
4989 supports OS threads, not green threads.
4990 * At long last, Rust has been overhauled for 'dynamically-sized
4991 types' ([DST]), which integrates 'fat pointers' (object types,
4992 arrays, and `str`) more deeply into the type system, making it
4994 * Rust now has a general [range syntax][range], `i..j`, `i..`, and
4995 `..j` that produce range types and which, when combined with the
4996 `Index` operator and multidispatch, leads to a convenient slice
4998 * The new range syntax revealed an ambiguity in the fixed-length
4999 array syntax, so now fixed length arrays [are written `[T;
5001 * The `Copy` trait is no longer implemented automatically. Unsafe
5002 pointers no longer implement `Sync` and `Send` so types
5003 containing them don't automatically either. `Sync` and `Send`
5004 are now 'unsafe traits' so one can "forcibly" implement them via
5005 `unsafe impl` if a type confirms to the requirements for them
5006 even though the internals do not (e.g. structs containing unsafe
5007 pointers like `Arc`). These changes are intended to prevent some
5008 footguns and are collectively known as [opt-in built-in
5009 traits][oibit] (though `Sync` and `Send` will soon become pure
5010 library types unknown to the compiler).
5011 * Operator traits now take their operands [by value][ops], and
5012 comparison traits can use multidispatch to compare one type
5013 against multiple other types, allowing e.g. `String` to be
5014 compared with `&str`.
5015 * `if let` and `while let` are no longer feature-gated.
5016 * Rust has adopted a more [uniform syntax for escaping unicode
5017 characters][unicode].
5018 * `macro_rules!` [has been declared stable][mac]. Though it is a
5019 flawed system it is sufficiently popular that it must be usable
5020 for 1.0. Effort has gone into [future-proofing][mac-future] it
5021 in ways that will allow other macro systems to be developed in
5022 parallel, and won't otherwise impact the evolution of the
5024 * The prelude has been [pared back significantly][prelude] such
5025 that it is the minimum necessary to support the most pervasive
5026 code patterns, and through [generalized where clauses][where]
5027 many of the prelude extension traits have been consolidated.
5028 * Rust's rudimentary reflection [has been removed][refl], as it
5029 incurred too much code generation for little benefit.
5030 * [Struct variants][structvars] are no longer feature-gated.
5031 * Trait bounds can be [polymorphic over lifetimes][hrtb]. Also
5032 known as 'higher-ranked trait bounds', this crucially allows
5033 unboxed closures to work.
5034 * Macros invocations surrounded by parens or square brackets and
5035 not terminated by a semicolon are [parsed as
5036 expressions][macros], which makes expressions like `vec![1i32,
5037 2, 3].len()` work as expected.
5038 * Trait objects now implement their traits automatically, and
5039 traits that can be coerced to objects now must be [object
5041 * Automatically deriving traits is now done with `#[derive(...)]`
5042 not `#[deriving(...)]` for [consistency with other naming
5043 conventions][derive].
5044 * Importing the containing module or enum at the same time as
5045 items or variants they contain is [now done with `self` instead
5046 of `mod`][self], as in use `foo::{self, bar}`
5047 * Glob imports are no longer feature-gated.
5048 * The `box` operator and `box` patterns have been feature-gated
5049 pending a redesign. For now unique boxes should be allocated
5050 like other containers, with `Box::new`.
5054 * A [series][coll1] of [efforts][coll2] to establish
5055 [conventions][coll3] for collections types has resulted in API
5056 improvements throughout the standard library.
5057 * New [APIs for error handling][err] provide ergonomic interop
5058 between error types, and [new conventions][err-conv] describe
5059 more clearly the recommended error handling strategies in Rust.
5060 * The `fail!` macro has been renamed to [`panic!`][panic] so that
5061 it is easier to discuss failure in the context of error handling
5062 without making clarifications as to whether you are referring to
5063 the 'fail' macro or failure more generally.
5064 * On Linux, `OsRng` prefers the new, more reliable `getrandom`
5065 syscall when available.
5066 * The 'serialize' crate has been renamed 'rustc-serialize' and
5067 moved out of the distribution to Cargo. Although it is widely
5068 used now, it is expected to be superseded in the near future.
5069 * The `Show` formatter, typically implemented with
5070 `#[derive(Show)]` is [now requested with the `{:?}`
5071 specifier][show] and is intended for use by all types, for uses
5072 such as `println!` debugging. The new `String` formatter must be
5073 implemented by hand, uses the `{}` specifier, and is intended
5074 for full-fidelity conversions of things that can logically be
5075 represented as strings.
5079 * [Flexible target specification][flex] allows rustc's code
5080 generation to be configured to support otherwise-unsupported
5082 * Rust comes with rust-gdb and rust-lldb scripts that launch their
5083 respective debuggers with Rust-appropriate pretty-printing.
5084 * The Windows installation of Rust is distributed with the
5085 MinGW components currently required to link binaries on that
5090 * Nullable enum optimizations have been extended to more types so
5091 that e.g. `Option<Vec<T>>` and `Option<String>` take up no more
5092 space than the inner types themselves.
5093 * Work has begun on supporting AArch64.
5095 [Cargo]: https://crates.io
5096 [unboxed]: http://smallcultfollowing.com/babysteps/blog/2014/11/26/purging-proc/
5097 [enum]: https://github.com/rust-lang/rfcs/blob/master/text/0390-enum-namespacing.md
5098 [flex]: https://github.com/rust-lang/rfcs/blob/master/text/0131-target-specification.md
5099 [err]: https://github.com/rust-lang/rfcs/blob/master/text/0201-error-chaining.md
5100 [err-conv]: https://github.com/rust-lang/rfcs/blob/master/text/0236-error-conventions.md
5101 [rt]: https://github.com/rust-lang/rfcs/blob/master/text/0230-remove-runtime.md
5102 [mac]: https://github.com/rust-lang/rfcs/blob/master/text/0453-macro-reform.md
5103 [mac-future]: https://github.com/rust-lang/rfcs/pull/550
5104 [DST]: http://smallcultfollowing.com/babysteps/blog/2014/01/05/dst-take-5/
5105 [coll1]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md
5106 [coll2]: https://github.com/rust-lang/rfcs/blob/master/text/0509-collections-reform-part-2.md
5107 [coll3]: https://github.com/rust-lang/rfcs/blob/master/text/0216-collection-views.md
5108 [ops]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md
5109 [prelude]: https://github.com/rust-lang/rfcs/blob/master/text/0503-prelude-stabilization.md
5110 [where]: https://github.com/rust-lang/rfcs/blob/master/text/0135-where.md
5111 [refl]: https://github.com/rust-lang/rfcs/blob/master/text/0379-remove-reflection.md
5112 [panic]: https://github.com/rust-lang/rfcs/blob/master/text/0221-panic.md
5113 [structvars]: https://github.com/rust-lang/rfcs/blob/master/text/0418-struct-variants.md
5114 [hrtb]: https://github.com/rust-lang/rfcs/blob/master/text/0387-higher-ranked-trait-bounds.md
5115 [unicode]: https://github.com/rust-lang/rfcs/blob/master/text/0446-es6-unicode-escapes.md
5116 [oibit]: https://github.com/rust-lang/rfcs/blob/master/text/0019-opt-in-builtin-traits.md
5117 [macros]: https://github.com/rust-lang/rfcs/blob/master/text/0378-expr-macros.md
5118 [range]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md#indexing-and-slicing
5119 [arrays]: https://github.com/rust-lang/rfcs/blob/master/text/0520-new-array-repeat-syntax.md
5120 [show]: https://github.com/rust-lang/rfcs/blob/master/text/0504-show-stabilization.md
5121 [derive]: https://github.com/rust-lang/rfcs/blob/master/text/0534-deriving2derive.md
5122 [self]: https://github.com/rust-lang/rfcs/blob/master/text/0532-self-in-use.md
5123 [fb]: https://github.com/rust-lang/rfcs/blob/master/text/0212-restore-int-fallback.md
5124 [objsafe]: https://github.com/rust-lang/rfcs/blob/master/text/0255-object-safety.md
5125 [assoc]: https://github.com/rust-lang/rfcs/blob/master/text/0195-associated-items.md
5126 [ints]: https://github.com/rust-lang/rfcs/pull/544#issuecomment-68760871
5127 [trpl]: https://doc.rust-lang.org/book/index.html
5128 [rbe]: http://rustbyexample.com/
5131 Version 0.12.0 (2014-10-09)
5132 =============================
5134 * ~1900 changes, numerous bugfixes
5138 * The introductory documentation (now called The Rust Guide) has
5139 been completely rewritten, as have a number of supplementary
5141 * Rust's package manager, Cargo, continues to improve and is
5142 sometimes considered to be quite awesome.
5143 * Many API's in `std` have been reviewed and updated for
5144 consistency with the in-development Rust coding
5145 guidelines. The standard library documentation tracks
5146 stabilization progress.
5147 * Minor libraries have been moved out-of-tree to the rust-lang org
5148 on GitHub: uuid, semver, glob, num, hexfloat, fourcc. They can
5149 be installed with Cargo.
5150 * Lifetime elision allows lifetime annotations to be left off of
5151 function declarations in many common scenarios.
5152 * Rust now works on 64-bit Windows.
5155 * Indexing can be overloaded with the `Index` and `IndexMut`
5157 * The `if let` construct takes a branch only if the `let` pattern
5158 matches, currently behind the 'if_let' feature gate.
5159 * 'where clauses', a more flexible syntax for specifying trait
5160 bounds that is more aesthetic, have been added for traits and
5161 free functions. Where clauses will in the future make it
5162 possible to constrain associated types, which would be
5163 impossible with the existing syntax.
5164 * A new slicing syntax (e.g. `[0..4]`) has been introduced behind
5165 the 'slicing_syntax' feature gate, and can be overloaded with
5166 the `Slice` or `SliceMut` traits.
5167 * The syntax for matching of sub-slices has been changed to use a
5168 postfix `..` instead of prefix (.e.g. `[a, b, c..]`), for
5169 consistency with other uses of `..` and to future-proof
5170 potential additional uses of the syntax.
5171 * The syntax for matching inclusive ranges in patterns has changed
5172 from `0..3` to `0...4` to be consistent with the exclusive range
5174 * Matching of sub-slices in non-tail positions (e.g. `[a.., b,
5175 c]`) has been put behind the 'advanced_slice_patterns' feature
5176 gate and may be removed in the future.
5177 * Components of tuples and tuple structs can be extracted using
5178 the `value.0` syntax, currently behind the `tuple_indexing`
5180 * The `#[crate_id]` attribute is no longer supported; versioning
5181 is handled by the package manager.
5182 * Renaming crate imports are now written `extern crate foo as bar`
5183 instead of `extern crate bar = foo`.
5184 * Renaming use statements are now written `use foo as bar` instead
5186 * `let` and `match` bindings and argument names in macros are now
5188 * The new, more efficient, closure types ('unboxed closures') have
5189 been added under a feature gate, 'unboxed_closures'. These will
5190 soon replace the existing closure types, once higher-ranked
5191 trait lifetimes are added to the language.
5192 * `move` has been added as a keyword, for indicating closures
5193 that capture by value.
5194 * Mutation and assignment is no longer allowed in pattern guards.
5195 * Generic structs and enums can now have trait bounds.
5196 * The `Share` trait is now called `Sync` to free up the term
5197 'shared' to refer to 'shared reference' (the default reference
5199 * Dynamically-sized types have been mostly implemented,
5200 unifying the behavior of fat-pointer types with the rest of the
5202 * As part of dynamically-sized types, the `Sized` trait has been
5203 introduced, which qualifying types implement by default, and
5204 which type parameters expect by default. To specify that a type
5205 parameter does not need to be sized, write `<Sized? T>`. Most
5206 types are `Sized`, notable exceptions being unsized arrays
5207 (`[T]`) and trait types.
5208 * Closures can return `!`, as in `|| -> !` or `proc() -> !`.
5209 * Lifetime bounds can now be applied to type parameters and object
5211 * The old, reference counted GC type, `Gc<T>` which was once
5212 denoted by the `@` sigil, has finally been removed. GC will be
5213 revisited in the future.
5216 * Library documentation has been improved for a number of modules.
5217 * Bit-vectors, collections::bitv has been modernized.
5218 * The url crate is deprecated in favor of
5219 http://github.com/servo/rust-url, which can be installed with
5221 * Most I/O stream types can be cloned and subsequently closed from
5223 * A `std::time::Duration` type has been added for use in I/O
5224 methods that rely on timers, as well as in the 'time' crate's
5225 `Timespec` arithmetic.
5226 * The runtime I/O abstraction layer that enabled the green thread
5227 scheduler to do non-thread-blocking I/O has been removed, along
5228 with the libuv-based implementation employed by the green thread
5229 scheduler. This will greatly simplify the future I/O work.
5230 * `collections::btree` has been rewritten to have a more
5231 idiomatic and efficient design.
5234 * rustdoc output now indicates the stability levels of API's.
5235 * The `--crate-name` flag can specify the name of the crate
5236 being compiled, like `#[crate_name]`.
5237 * The `-C metadata` specifies additional metadata to hash into
5238 symbol names, and `-C extra-filename` specifies additional
5239 information to put into the output filename, for use by the
5240 package manager for versioning.
5241 * debug info generation has continued to improve and should be
5242 more reliable under both gdb and lldb.
5243 * rustc has experimental support for compiling in parallel
5244 using the `-C codegen-units` flag.
5245 * rustc no longer encodes rpath information into binaries by
5249 * Stack usage has been optimized with LLVM lifetime annotations.
5250 * Official Rust binaries on Linux are more compatible with older
5251 kernels and distributions, built on CentOS 5.10.
5254 Version 0.11.0 (2014-07-02)
5255 ==========================
5257 * ~1700 changes, numerous bugfixes
5260 * ~[T] has been removed from the language. This type is superseded by
5262 * ~str has been removed from the language. This type is superseded by
5264 * ~T has been removed from the language. This type is superseded by the
5266 * @T has been removed from the language. This type is superseded by the
5267 standard library's std::gc::Gc<T> type.
5268 * Struct fields are now all private by default.
5269 * Vector indices and shift amounts are both required to be a `uint`
5270 instead of any integral type.
5271 * Byte character, byte string, and raw byte string literals are now all
5272 supported by prefixing the normal literal with a `b`.
5273 * Multiple ABIs are no longer allowed in an ABI string
5274 * The syntax for lifetimes on closures/procedures has been tweaked
5275 slightly: `<'a>|A, B|: 'b + K -> T`
5276 * Floating point modulus has been removed from the language; however it
5277 is still provided by a library implementation.
5278 * Private enum variants are now disallowed.
5279 * The `priv` keyword has been removed from the language.
5280 * A closure can no longer be invoked through a &-pointer.
5281 * The `use foo, bar, baz;` syntax has been removed from the language.
5282 * The transmute intrinsic no longer works on type parameters.
5283 * Statics now allow blocks/items in their definition.
5284 * Trait bounds are separated from objects with + instead of : now.
5285 * Objects can no longer be read while they are mutably borrowed.
5286 * The address of a static is now marked as insignificant unless the
5287 #[inline(never)] attribute is placed it.
5288 * The #[unsafe_destructor] attribute is now behind a feature gate.
5289 * Struct literals are no longer allowed in ambiguous positions such as
5290 if, while, match, and for..in.
5291 * Declaration of lang items and intrinsics are now feature-gated by
5293 * Integral literals no longer default to `int`, and floating point
5294 literals no longer default to `f64`. Literals must be suffixed with an
5295 appropriate type if inference cannot determine the type of the
5297 * The Box<T> type is no longer implicitly borrowed to &mut T.
5298 * Procedures are now required to not capture borrowed references.
5301 * The standard library is now a "facade" over a number of underlying
5302 libraries. This means that development on the standard library should
5303 be speedier due to smaller crates, as well as a clearer line between
5305 * A new library, libcore, lives under the standard library's facade
5306 which is Rust's "0-assumption" library, suitable for embedded and
5307 kernel development for example.
5308 * A regex crate has been added to the standard distribution. This crate
5309 includes statically compiled regular expressions.
5310 * The unwrap/unwrap_err methods on Result require a Show bound for
5311 better error messages.
5312 * The return types of the std::comm primitives have been centralized
5313 around the Result type.
5314 * A number of I/O primitives have gained the ability to time out their
5316 * A number of I/O primitives have gained the ability to close their
5317 reading/writing halves to cancel pending operations.
5318 * Reverse iterator methods have been removed in favor of `rev()` on
5319 their forward-iteration counterparts.
5320 * A bitflags! macro has been added to enable easy interop with C and
5321 management of bit flags.
5322 * A debug_assert! macro is now provided which is disabled when
5323 `--cfg ndebug` is passed to the compiler.
5324 * A graphviz crate has been added for creating .dot files.
5325 * The std::cast module has been migrated into std::mem.
5326 * The std::local_data api has been migrated from freestanding functions
5327 to being based on methods.
5328 * The Pod trait has been renamed to Copy.
5329 * jemalloc has been added as the default allocator for types.
5330 * The API for allocating memory has been changed to use proper alignment
5331 and sized deallocation
5332 * Connecting a TcpStream or binding a TcpListener is now based on a
5333 string address and a u16 port. This allows connecting to a hostname as
5335 * The Reader trait now contains a core method, read_at_least(), which
5336 correctly handles many repeated 0-length reads.
5337 * The process-spawning API is now centered around a builder-style
5339 * The :? printing qualifier has been moved from the standard library to
5340 an external libdebug crate.
5341 * Eq/Ord have been renamed to PartialEq/PartialOrd. TotalEq/TotalOrd
5342 have been renamed to Eq/Ord.
5343 * The select/plural methods have been removed from format!. The escapes
5344 for { and } have also changed from \{ and \} to {{ and }},
5346 * The TaskBuilder API has been re-worked to be a true builder, and
5347 extension traits for spawning native/green tasks have been added.
5350 * All breaking changes to the language or libraries now have their
5351 commit message annotated with `[breaking-change]` to allow for easy
5352 discovery of breaking changes.
5353 * The compiler will now try to suggest how to annotate lifetimes if a
5354 lifetime-related error occurs.
5355 * Debug info continues to be improved greatly with general bug fixes and
5356 better support for situations like link time optimization (LTO).
5357 * Usage of syntax extensions when cross-compiling has been fixed.
5358 * Functionality equivalent to GCC & Clang's -ffunction-sections,
5359 -fdata-sections and --gc-sections has been enabled by default
5360 * The compiler is now stricter about where it will load module files
5361 from when a module is declared via `mod foo;`.
5362 * The #[phase(syntax)] attribute has been renamed to #[phase(plugin)].
5363 Syntax extensions are now discovered via a "plugin registrar" type
5364 which will be extended in the future to other various plugins.
5365 * Lints have been restructured to allow for dynamically loadable lints.
5366 * A number of rustdoc improvements:
5367 * The HTML output has been visually redesigned.
5368 * Markdown is now powered by hoedown instead of sundown.
5369 * Searching heuristics have been greatly improved.
5370 * The search index has been reduced in size by a great amount.
5371 * Cross-crate documentation via `pub use` has been greatly improved.
5372 * Primitive types are now hyperlinked and documented.
5373 * Documentation has been moved from static.rust-lang.org/doc to
5375 * A new sandbox, play.rust-lang.org, is available for running and
5376 sharing rust code examples on-line.
5377 * Unused attributes are now more robustly warned about.
5378 * The dead_code lint now warns about unused struct fields.
5379 * Cross-compiling to iOS is now supported.
5380 * Cross-compiling to mipsel is now supported.
5381 * Stability attributes are now inherited by default and no longer apply
5382 to intra-crate usage, only inter-crate usage.
5383 * Error message related to non-exhaustive match expressions have been
5387 Version 0.10 (2014-04-03)
5388 =========================
5390 * ~1500 changes, numerous bugfixes
5393 * A new RFC process is now in place for modifying the language.
5394 * Patterns with `@`-pointers have been removed from the language.
5395 * Patterns with unique vectors (`~[T]`) have been removed from the
5397 * Patterns with unique strings (`~str`) have been removed from the
5399 * `@str` has been removed from the language.
5400 * `@[T]` has been removed from the language.
5401 * `@self` has been removed from the language.
5402 * `@Trait` has been removed from the language.
5403 * Headers on `~` allocations which contain `@` boxes inside the type for
5404 reference counting have been removed.
5405 * The semantics around the lifetimes of temporary expressions have changed,
5406 see #3511 and #11585 for more information.
5407 * Cross-crate syntax extensions are now possible, but feature gated. See
5408 #11151 for more information. This includes both `macro_rules!` macros as
5409 well as syntax extensions such as `format!`.
5410 * New lint modes have been added, and older ones have been turned on to be
5412 * Unnecessary parentheses
5415 * Uppercase variables
5416 * Publicly visible private types
5417 * `#[deriving]` with raw pointers
5418 * Unsafe functions can no longer be coerced to closures.
5419 * Various obscure macros such as `log_syntax!` are now behind feature gates.
5420 * The `#[simd]` attribute is now behind a feature gate.
5421 * Visibility is no longer allowed on `extern crate` statements, and
5422 unnecessary visibility (`priv`) is no longer allowed on `use` statements.
5423 * Trailing commas are now allowed in argument lists and tuple patterns.
5424 * The `do` keyword has been removed, it is now a reserved keyword.
5425 * Default type parameters have been implemented, but are feature gated.
5426 * Borrowed variables through captures in closures are now considered soundly.
5427 * `extern mod` is now `extern crate`
5428 * The `Freeze` trait has been removed.
5429 * The `Share` trait has been added for types that can be shared among
5431 * Labels in macros are now hygienic.
5432 * Expression/statement macro invocations can be delimited with `{}` now.
5433 * Treatment of types allowed in `static mut` locations has been tweaked.
5434 * The `*` and `.` operators are now overloadable through the `Deref` and
5436 * `~Trait` and `proc` no longer have `Send` bounds by default.
5437 * Partial type hints are now supported with the `_` type marker.
5438 * An `Unsafe` type was introduced for interior mutability. It is now
5439 considered undefined to transmute from `&T` to `&mut T` without using the
5441 * The #[linkage] attribute was implemented for extern statics/functions.
5442 * The inner attribute syntax has changed from `#[foo];` to `#![foo]`.
5443 * `Pod` was renamed to `Copy`.
5446 * The `libextra` library has been removed. It has now been decomposed into
5447 component libraries with smaller and more focused nuggets of
5448 functionality. The full list of libraries can be found on the
5449 documentation index page.
5450 * std: `std::condition` has been removed. All I/O errors are now propagated
5451 through the `Result` type. In order to assist with error handling, a
5452 `try!` macro for unwrapping errors with an early return and a lint for
5453 unused results has been added. See #12039 for more information.
5454 * std: The `vec` module has been renamed to `slice`.
5455 * std: A new vector type, `Vec<T>`, has been added in preparation for DST.
5456 This will become the only growable vector in the future.
5457 * std: `std::io` now has more public re-exports. Types such as `BufferedReader`
5458 are now found at `std::io::BufferedReader` instead of
5459 `std::io::buffered::BufferedReader`.
5460 * std: `print` and `println` are no longer in the prelude, the `print!` and
5461 `println!` macros are intended to be used instead.
5462 * std: `Rc` now has a `Weak` pointer for breaking cycles, and it no longer
5463 attempts to statically prevent cycles.
5464 * std: The standard distribution is adopting the policy of pushing failure
5465 to the user rather than failing in libraries. Many functions (such as
5466 `slice::last()`) now return `Option<T>` instead of `T` + failing.
5467 * std: `fmt::Default` has been renamed to `fmt::Show`, and it now has a new
5468 deriving mode: `#[deriving(Show)]`.
5469 * std: `ToStr` is now implemented for all types implementing `Show`.
5470 * std: The formatting trait methods now take `&self` instead of `&T`
5471 * std: The `invert()` method on iterators has been renamed to `rev()`
5472 * std: `std::num` has seen a reduction in the genericity of its traits,
5473 consolidating functionality into a few core traits.
5474 * std: Backtraces are now printed on task failure if the environment
5475 variable `RUST_BACKTRACE` is present.
5476 * std: Naming conventions for iterators have been standardized. More details
5477 can be found on the wiki's style guide.
5478 * std: `eof()` has been removed from the `Reader` trait. Specific types may
5479 still implement the function.
5480 * std: Networking types are now cloneable to allow simultaneous reads/writes.
5481 * std: `assert_approx_eq!` has been removed
5482 * std: The `e` and `E` formatting specifiers for floats have been added to
5483 print them in exponential notation.
5484 * std: The `Times` trait has been removed
5485 * std: Indications of variance and opting out of builtin bounds is done
5486 through marker types in `std::kinds::marker` now
5487 * std: `hash` has been rewritten, `IterBytes` has been removed, and
5488 `#[deriving(Hash)]` is now possible.
5489 * std: `SharedChan` has been removed, `Sender` is now cloneable.
5490 * std: `Chan` and `Port` were renamed to `Sender` and `Receiver`.
5491 * std: `Chan::new` is now `channel()`.
5492 * std: A new synchronous channel type has been implemented.
5493 * std: A `select!` macro is now provided for selecting over `Receiver`s.
5494 * std: `hashmap` and `trie` have been moved to `libcollections`
5495 * std: `run` has been rolled into `io::process`
5496 * std: `assert_eq!` now uses `{}` instead of `{:?}`
5497 * std: The equality and comparison traits have seen some reorganization.
5498 * std: `rand` has moved to `librand`.
5499 * std: `to_{lower,upper}case` has been implemented for `char`.
5500 * std: Logging has been moved to `liblog`.
5501 * collections: `HashMap` has been rewritten for higher performance and less
5503 * native: The default runtime is now `libnative`. If `libgreen` is desired,
5504 it can be booted manually. The runtime guide has more information and
5506 * native: All I/O functionality except signals has been implemented.
5507 * green: Task spawning with `libgreen` has been optimized with stack caching
5508 and various trimming of code.
5509 * green: Tasks spawned by `libgreen` now have an unmapped guard page.
5510 * sync: The `extra::sync` module has been updated to modern rust (and moved
5511 to the `sync` library), tweaking and improving various interfaces while
5512 dropping redundant functionality.
5513 * sync: A new `Barrier` type has been added to the `sync` library.
5514 * sync: An efficient mutex for native and green tasks has been implemented.
5515 * serialize: The `base64` module has seen some improvement. It treats
5516 newlines better, has non-string error values, and has seen general
5518 * fourcc: A `fourcc!` macro was introduced
5519 * hexfloat: A `hexfloat!` macro was implemented for specifying floats via a
5520 hexadecimal literal.
5523 * `rustpkg` has been deprecated and removed from the main repository. Its
5524 replacement, `cargo`, is under development.
5525 * Nightly builds of rust are now available
5526 * The memory usage of rustc has been improved many times throughout this
5528 * The build process supports disabling rpath support for the rustc binary
5530 * Code generation has improved in some cases, giving more information to the
5531 LLVM optimization passes to enable more extensive optimizations.
5532 * Debuginfo compatibility with lldb on OSX has been restored.
5533 * The master branch is now gated on an android bot, making building for
5534 android much more reliable.
5535 * Output flags have been centralized into one `--emit` flag.
5536 * Crate type flags have been centralized into one `--crate-type` flag.
5537 * Codegen flags have been consolidated behind a `-C` flag.
5538 * Linking against outdated crates now has improved error messages.
5539 * Error messages with lifetimes will often suggest how to annotate the
5540 function to fix the error.
5541 * Many more types are documented in the standard library, and new guides
5543 * Many `rustdoc` improvements:
5544 * code blocks are syntax highlighted.
5545 * render standalone markdown files.
5546 * the --test flag tests all code blocks by default.
5547 * exported macros are displayed.
5548 * re-exported types have their documentation inlined at the location of the
5550 * search works across crates that have been rendered to the same output
5554 Version 0.9 (2014-01-09)
5555 ==========================
5557 * ~1800 changes, numerous bugfixes
5560 * The `float` type has been removed. Use `f32` or `f64` instead.
5561 * A new facility for enabling experimental features (feature gating) has
5562 been added, using the crate-level `#[feature(foo)]` attribute.
5563 * Managed boxes (@) are now behind a feature gate
5564 (`#[feature(managed_boxes)]`) in preparation for future removal. Use the
5565 standard library's `Gc` or `Rc` types instead.
5566 * `@mut` has been removed. Use `std::cell::{Cell, RefCell}` instead.
5567 * Jumping back to the top of a loop is now done with `continue` instead of
5569 * Strings can no longer be mutated through index assignment.
5570 * Raw strings can be created via the basic `r"foo"` syntax or with matched
5571 hash delimiters, as in `r###"foo"###`.
5572 * `~fn` is now written `proc (args) -> retval { ... }` and may only be
5574 * The `&fn` type is now written `|args| -> ret` to match the literal form.
5575 * `@fn`s have been removed.
5576 * `do` only works with procs in order to make it obvious what the cost
5578 * Single-element tuple-like structs can no longer be dereferenced to
5579 obtain the inner value. A more comprehensive solution for overloading
5580 the dereference operator will be provided in the future.
5581 * The `#[link(...)]` attribute has been replaced with
5582 `#[crate_id = "name#vers"]`.
5583 * Empty `impl`s must be terminated with empty braces and may not be
5584 terminated with a semicolon.
5585 * Keywords are no longer allowed as lifetime names; the `self` lifetime
5586 no longer has any special meaning.
5587 * The old `fmt!` string formatting macro has been removed.
5588 * `printf!` and `printfln!` (old-style formatting) removed in favor of
5589 `print!` and `println!`.
5590 * `mut` works in patterns now, as in `let (mut x, y) = (1, 2);`.
5591 * The `extern mod foo (name = "bar")` syntax has been removed. Use
5592 `extern mod foo = "bar"` instead.
5593 * New reserved keywords: `alignof`, `offsetof`, `sizeof`.
5594 * Macros can have attributes.
5595 * Macros can expand to items with attributes.
5596 * Macros can expand to multiple items.
5597 * The `asm!` macro is feature-gated (`#[feature(asm)]`).
5598 * Comments may be nested.
5599 * Values automatically coerce to trait objects they implement, without
5601 * Enum discriminants are no longer an entire word but as small as needed to
5602 contain all the variants. The `repr` attribute can be used to override
5603 the discriminant size, as in `#[repr(int)]` for integer-sized, and
5604 `#[repr(C)]` to match C enums.
5605 * Non-string literals are not allowed in attributes (they never worked).
5606 * The FFI now supports variadic functions.
5607 * Octal numeric literals, as in `0o7777`.
5608 * The `concat!` syntax extension performs compile-time string concatenation.
5609 * The `#[fixed_stack_segment]` and `#[rust_stack]` attributes have been
5610 removed as Rust no longer uses segmented stacks.
5611 * Non-ascii identifiers are feature-gated (`#[feature(non_ascii_idents)]`).
5612 * Ignoring all fields of an enum variant or tuple-struct is done with `..`,
5613 not `*`; ignoring remaining fields of a struct is also done with `..`,
5614 not `_`; ignoring a slice of a vector is done with `..`, not `.._`.
5615 * `rustc` supports the "win64" calling convention via `extern "win64"`.
5616 * `rustc` supports the "system" calling convention, which defaults to the
5617 preferred convention for the target platform, "stdcall" on 32-bit Windows,
5619 * The `type_overflow` lint (default: warn) checks literals for overflow.
5620 * The `unsafe_block` lint (default: allow) checks for usage of `unsafe`.
5621 * The `attribute_usage` lint (default: warn) warns about unknown
5623 * The `unknown_features` lint (default: warn) warns about unknown
5625 * The `dead_code` lint (default: warn) checks for dead code.
5626 * Rust libraries can be linked statically to one another
5627 * `#[link_args]` is behind the `link_args` feature gate.
5628 * Native libraries are now linked with `#[link(name = "foo")]`
5629 * Native libraries can be statically linked to a rust crate
5630 (`#[link(name = "foo", kind = "static")]`).
5631 * Native OS X frameworks are now officially supported
5632 (`#[link(name = "foo", kind = "framework")]`).
5633 * The `#[thread_local]` attribute creates thread-local (not task-local)
5634 variables. Currently behind the `thread_local` feature gate.
5635 * The `return` keyword may be used in closures.
5636 * Types that can be copied via a memcpy implement the `Pod` kind.
5637 * The `cfg` attribute can now be used on struct fields and enum variants.
5640 * std: The `option` and `result` API's have been overhauled to make them
5641 simpler, more consistent, and more composable.
5642 * std: The entire `std::io` module has been replaced with one that is
5643 more comprehensive and that properly interfaces with the underlying
5644 scheduler. File, TCP, UDP, Unix sockets, pipes, and timers are all
5646 * std: `io::util` contains a number of useful implementations of
5647 `Reader` and `Writer`, including `NullReader`, `NullWriter`,
5648 `ZeroReader`, `TeeReader`.
5649 * std: The reference counted pointer type `extra::rc` moved into std.
5650 * std: The `Gc` type in the `gc` module will replace `@` (it is currently
5651 just a wrapper around it).
5652 * std: The `Either` type has been removed.
5653 * std: `fmt::Default` can be implemented for any type to provide default
5654 formatting to the `format!` macro, as in `format!("{}", myfoo)`.
5655 * std: The `rand` API continues to be tweaked.
5656 * std: The `rust_begin_unwind` function, useful for inserting breakpoints
5657 on failure in gdb, is now named `rust_fail`.
5658 * std: The `each_key` and `each_value` methods on `HashMap` have been
5659 replaced by the `keys` and `values` iterators.
5660 * std: Functions dealing with type size and alignment have moved from the
5661 `sys` module to the `mem` module.
5662 * std: The `path` module was written and API changed.
5663 * std: `str::from_utf8` has been changed to cast instead of allocate.
5664 * std: `starts_with` and `ends_with` methods added to vectors via the
5665 `ImmutableEqVector` trait, which is in the prelude.
5666 * std: Vectors can be indexed with the `get_opt` method, which returns `None`
5667 if the index is out of bounds.
5668 * std: Task failure no longer propagates between tasks, as the model was
5669 complex, expensive, and incompatible with thread-based tasks.
5670 * std: The `Any` type can be used for dynamic typing.
5671 * std: `~Any` can be passed to the `fail!` macro and retrieved via
5673 * std: Methods that produce iterators generally do not have an `_iter`
5675 * std: `cell::Cell` and `cell::RefCell` can be used to introduce mutability
5676 roots (mutable fields, etc.). Use instead of e.g. `@mut`.
5677 * std: `util::ignore` renamed to `prelude::drop`.
5678 * std: Slices have `sort` and `sort_by` methods via the `MutableVector`
5680 * std: `vec::raw` has seen a lot of cleanup and API changes.
5681 * std: The standard library no longer includes any C++ code, and very
5682 minimal C, eliminating the dependency on libstdc++.
5683 * std: Runtime scheduling and I/O functionality has been factored out into
5684 extensible interfaces and is now implemented by two different crates:
5685 libnative, for native threading and I/O; and libgreen, for green threading
5686 and I/O. This paves the way for using the standard library in more limited
5687 embedded environments.
5688 * std: The `comm` module has been rewritten to be much faster, have a
5689 simpler, more consistent API, and to work for both native and green
5691 * std: All libuv dependencies have been moved into the rustuv crate.
5692 * native: New implementations of runtime scheduling on top of OS threads.
5693 * native: New native implementations of TCP, UDP, file I/O, process spawning,
5695 * green: The green thread scheduler and message passing types are almost
5697 * extra: The `flatpipes` module had bitrotted and was removed.
5698 * extra: All crypto functions have been removed and Rust now has a policy of
5699 not reimplementing crypto in the standard library. In the future crypto
5700 will be provided by external crates with bindings to established libraries.
5701 * extra: `c_vec` has been modernized.
5702 * extra: The `sort` module has been removed. Use the `sort` method on
5706 * The `rust` and `rusti` commands have been removed, due to lack of
5708 * `rustdoc` was completely rewritten.
5709 * `rustdoc` can test code examples in documentation.
5710 * `rustpkg` can test packages with the argument, 'test'.
5711 * `rustpkg` supports arbitrary dependencies, including C libraries.
5712 * `rustc`'s support for generating debug info is improved again.
5713 * `rustc` has better error reporting for unbalanced delimiters.
5714 * `rustc`'s JIT support was removed due to bitrot.
5715 * Executables and static libraries can be built with LTO (-Z lto)
5716 * `rustc` adds a `--dep-info` flag for communicating dependencies to
5720 Version 0.8 (2013-09-26)
5721 ============================
5723 * ~2200 changes, numerous bugfixes
5726 * The `for` loop syntax has changed to work with the `Iterator` trait.
5727 * At long last, unwinding works on Windows.
5728 * Default methods are ready for use.
5729 * Many trait inheritance bugs fixed.
5730 * Owned and borrowed trait objects work more reliably.
5731 * `copy` is no longer a keyword. It has been replaced by the `Clone` trait.
5732 * rustc can omit emission of code for the `debug!` macro if it is passed
5734 * mod.rs is now "blessed". When loading `mod foo;`, rustc will now look
5735 for foo.rs, then foo/mod.rs, and will generate an error when both are
5737 * Strings no longer contain trailing nulls. The new `std::c_str` module
5738 provides new mechanisms for converting to C strings.
5739 * The type of foreign functions is now `extern "C" fn` instead of `*u8'.
5740 * The FFI has been overhauled such that foreign functions are called directly,
5741 instead of through a stack-switching wrapper.
5742 * Calling a foreign function must be done through a Rust function with the
5743 `#[fixed_stack_segment]` attribute.
5744 * The `externfn!` macro can be used to declare both a foreign function and
5745 a `#[fixed_stack_segment]` wrapper at once.
5746 * `pub` and `priv` modifiers on `extern` blocks are no longer parsed.
5747 * `unsafe` is no longer allowed on extern fns - they are all unsafe.
5748 * `priv` is disallowed everywhere except for struct fields and enum variants.
5749 * `&T` (besides `&'static T`) is no longer allowed in `@T`.
5750 * `ref` bindings in irrefutable patterns work correctly now.
5751 * `char` is now prevented from containing invalid code points.
5752 * Casting to `bool` is no longer allowed.
5753 * `\0` is now accepted as an escape in chars and strings.
5754 * `yield` is a reserved keyword.
5755 * `typeof` is a reserved keyword.
5756 * Crates may be imported by URL with `extern mod foo = "url";`.
5757 * Explicit enum discriminants may be given as uints as in `enum E { V = 0u }`
5758 * Static vectors can be initialized with repeating elements,
5759 e.g. `static foo: [u8, .. 100]: [0, .. 100];`.
5760 * Static structs can be initialized with functional record update,
5761 e.g. `static foo: Foo = Foo { a: 5, .. bar };`.
5762 * `cfg!` can be used to conditionally execute code based on the crate
5763 configuration, similarly to `#[cfg(...)]`.
5764 * The `unnecessary_qualification` lint detects unneeded module
5765 prefixes (default: allow).
5766 * Arithmetic operations have been implemented on the SIMD types in
5767 `std::unstable::simd`.
5768 * Exchange allocation headers were removed, reducing memory usage.
5769 * `format!` implements a completely new, extensible, and higher-performance
5770 string formatting system. It will replace `fmt!`.
5771 * `print!` and `println!` write formatted strings (using the `format!`
5772 extension) to stdout.
5773 * `write!` and `writeln!` write formatted strings (using the `format!`
5774 extension) to the new Writers in `std::rt::io`.
5775 * The library section in which a function or static is placed may
5776 be specified with `#[link_section = "..."]`.
5777 * The `proto!` syntax extension for defining bounded message protocols
5779 * `macro_rules!` is hygienic for `let` declarations.
5780 * The `#[export_name]` attribute specifies the name of a symbol.
5781 * `unreachable!` can be used to indicate unreachable code, and fails
5785 * std: Transitioned to the new runtime, written in Rust.
5786 * std: Added an experimental I/O library, `rt::io`, based on the new
5788 * std: A new generic `range` function was added to the prelude, replacing
5789 `uint::range` and friends.
5790 * std: `range_rev` no longer exists. Since range is an iterator it can be
5791 reversed with `range(lo, hi).invert()`.
5792 * std: The `chain` method on option renamed to `and_then`; `unwrap_or_default`
5793 renamed to `unwrap_or`.
5794 * std: The `iterator` module was renamed to `iter`.
5795 * std: Integral types now support the `checked_add`, `checked_sub`, and
5796 `checked_mul` operations for detecting overflow.
5797 * std: Many methods in `str`, `vec`, `option, `result` were renamed for
5799 * std: Methods are standardizing on conventions for casting methods:
5800 `to_foo` for copying, `into_foo` for moving, `as_foo` for temporary
5802 * std: The `CString` type in `c_str` provides new ways to convert to and
5804 * std: `DoubleEndedIterator` can yield elements in two directions.
5805 * std: The `mut_split` method on vectors partitions an `&mut [T]` into
5807 * std: `str::from_bytes` renamed to `str::from_utf8`.
5808 * std: `pop_opt` and `shift_opt` methods added to vectors.
5809 * std: The task-local data interface no longer uses @, and keys are
5810 no longer function pointers.
5811 * std: The `swap_unwrap` method of `Option` renamed to `take_unwrap`.
5812 * std: Added `SharedPort` to `comm`.
5813 * std: `Eq` has a default method for `ne`; only `eq` is required
5815 * std: `Ord` has default methods for `le`, `gt` and `ge`; only `lt`
5816 is required in implementations.
5817 * std: `is_utf8` performance is improved, impacting many string functions.
5818 * std: `os::MemoryMap` provides cross-platform mmap.
5819 * std: `ptr::offset` is now unsafe, but also more optimized. Offsets that
5820 are not 'in-bounds' are considered undefined.
5821 * std: Many freestanding functions in `vec` removed in favor of methods.
5822 * std: Many freestanding functions on scalar types removed in favor of
5824 * std: Many options to task builders were removed since they don't make
5825 sense in the new scheduler design.
5826 * std: More containers implement `FromIterator` so can be created by the
5828 * std: More complete atomic types in `unstable::atomics`.
5829 * std: `comm::PortSet` removed.
5830 * std: Mutating methods in the `Set` and `Map` traits have been moved into
5831 the `MutableSet` and `MutableMap` traits. `Container::is_empty`,
5832 `Map::contains_key`, `MutableMap::insert`, and `MutableMap::remove` have
5833 default implementations.
5834 * std: Various `from_str` functions were removed in favor of a generic
5835 `from_str` which is available in the prelude.
5836 * std: `util::unreachable` removed in favor of the `unreachable!` macro.
5837 * extra: `dlist`, the doubly-linked list was modernized.
5838 * extra: Added a `hex` module with `ToHex` and `FromHex` traits.
5839 * extra: Added `glob` module, replacing `std::os::glob`.
5840 * extra: `rope` was removed.
5841 * extra: `deque` was renamed to `ringbuf`. `RingBuf` implements `Deque`.
5842 * extra: `net`, and `timer` were removed. The experimental replacements
5843 are `std::rt::io::net` and `std::rt::io::timer`.
5844 * extra: Iterators implemented for `SmallIntMap`.
5845 * extra: Iterators implemented for `Bitv` and `BitvSet`.
5846 * extra: `SmallIntSet` removed. Use `BitvSet`.
5847 * extra: Performance of JSON parsing greatly improved.
5848 * extra: `semver` updated to SemVer 2.0.0.
5849 * extra: `term` handles more terminals correctly.
5850 * extra: `dbg` module removed.
5851 * extra: `par` module removed.
5852 * extra: `future` was cleaned up, with some method renames.
5853 * extra: Most free functions in `getopts` were converted to methods.
5856 * rustc's debug info generation (`-Z debug-info`) is greatly improved.
5857 * rustc accepts `--target-cpu` to compile to a specific CPU architecture,
5858 similarly to gcc's `--march` flag.
5859 * rustc's performance compiling small crates is much better.
5860 * rustpkg has received many improvements.
5861 * rustpkg supports git tags as package IDs.
5862 * rustpkg builds into target-specific directories so it can be used for
5864 * The number of concurrent test tasks is controlled by the environment
5865 variable RUST_TEST_TASKS.
5866 * The test harness can now report metrics for benchmarks.
5867 * All tools have man pages.
5868 * Programs compiled with `--test` now support the `-h` and `--help` flags.
5869 * The runtime uses jemalloc for allocations.
5870 * Segmented stacks are temporarily disabled as part of the transition to
5871 the new runtime. Stack overflows are possible!
5872 * A new documentation backend, rustdoc_ng, is available for use. It is
5873 still invoked through the normal `rustdoc` command.
5876 Version 0.7 (2013-07-03)
5877 =======================
5879 * ~2000 changes, numerous bugfixes
5882 * `impl`s no longer accept a visibility qualifier. Put them on methods
5884 * The borrow checker has been rewritten with flow-sensitivity, fixing
5885 many bugs and inconveniences.
5886 * The `self` parameter no longer implicitly means `&'self self`,
5887 and can be explicitly marked with a lifetime.
5888 * Overloadable compound operators (`+=`, etc.) have been temporarily
5889 removed due to bugs.
5890 * The `for` loop protocol now requires `for`-iterators to return `bool`
5891 so they compose better.
5892 * The `Durable` trait is replaced with the `'static` bounds.
5893 * Trait default methods work more often.
5894 * Structs with the `#[packed]` attribute have byte alignment and
5895 no padding between fields.
5896 * Type parameters bound by `Copy` must now be copied explicitly with
5898 * It is now illegal to move out of a dereferenced unsafe pointer.
5899 * `Option<~T>` is now represented as a nullable pointer.
5900 * `@mut` does dynamic borrow checks correctly.
5901 * The `main` function is only detected at the topmost level of the crate.
5902 The `#[main]` attribute is still valid anywhere.
5903 * Struct fields may no longer be mutable. Use inherited mutability.
5904 * The `#[no_send]` attribute makes a type that would otherwise be
5906 * The `#[no_freeze]` attribute makes a type that would otherwise be
5908 * Unbounded recursion will abort the process after reaching the limit
5909 specified by the `RUST_MAX_STACK` environment variable (default: 1GB).
5910 * The `vecs_implicitly_copyable` lint mode has been removed. Vectors
5911 are never implicitly copyable.
5912 * `#[static_assert]` makes compile-time assertions about static bools.
5913 * At long last, 'argument modes' no longer exist.
5914 * The rarely used `use mod` statement no longer exists.
5917 * `fail!` and `assert!` accept `~str`, `&'static str` or `fmt!`-style
5919 * `Encodable`, `Decodable`, `Ord`, `TotalOrd`, `TotalEq`, `DeepClone`,
5920 `Rand`, `Zero` and `ToStr` can all be automatically derived with
5922 * The `bytes!` macro returns a vector of bytes for string, u8, char,
5923 and unsuffixed integer literals.
5926 * The `core` crate was renamed to `std`.
5927 * The `std` crate was renamed to `extra`.
5928 * More and improved documentation.
5929 * std: `iterator` module for external iterator objects.
5930 * Many old-style (internal, higher-order function) iterators replaced by
5931 implementations of `Iterator`.
5932 * std: Many old internal vector and string iterators,
5933 incl. `any`, `all`. removed.
5934 * std: The `finalize` method of `Drop` renamed to `drop`.
5935 * std: The `drop` method now takes `&mut self` instead of `&self`.
5936 * std: The prelude no longer re-exports any modules, only types and traits.
5937 * std: Prelude additions: `print`, `println`, `FromStr`, `ApproxEq`, `Equiv`,
5938 `Iterator`, `IteratorUtil`, many numeric traits, many tuple traits.
5939 * std: New numeric traits: `Fractional`, `Real`, `RealExt`, `Integer`, `Ratio`,
5940 `Algebraic`, `Trigonometric`, `Exponential`, `Primitive`.
5941 * std: Tuple traits and accessors defined for up to 12-tuples, e.g.
5942 `(0, 1, 2).n2()` or `(0, 1, 2).n2_ref()`.
5943 * std: Many types implement `Clone`.
5944 * std: `path` type renamed to `Path`.
5945 * std: `mut` module and `Mut` type removed.
5946 * std: Many standalone functions removed in favor of methods and iterators
5947 in `vec`, `str`. In the future methods will also work as functions.
5948 * std: `reinterpret_cast` removed. Use `transmute`.
5949 * std: ascii string handling in `std::ascii`.
5950 * std: `Rand` is implemented for ~/@.
5951 * std: `run` module for spawning processes overhauled.
5952 * std: Various atomic types added to `unstable::atomic`.
5953 * std: Various types implement `Zero`.
5954 * std: `LinearMap` and `LinearSet` renamed to `HashMap` and `HashSet`.
5955 * std: Borrowed pointer functions moved from `ptr` to `borrow`.
5956 * std: Added `os::mkdir_recursive`.
5957 * std: Added `os::glob` function performs filesystems globs.
5958 * std: `FuzzyEq` renamed to `ApproxEq`.
5959 * std: `Map` now defines `pop` and `swap` methods.
5960 * std: `Cell` constructors converted to static methods.
5961 * extra: `rc` module adds the reference counted pointers, `Rc` and `RcMut`.
5962 * extra: `flate` module moved from `std` to `extra`.
5963 * extra: `fileinput` module for iterating over a series of files.
5964 * extra: `Complex` number type and `complex` module.
5965 * extra: `Rational` number type and `rational` module.
5966 * extra: `BigInt`, `BigUint` implement numeric and comparison traits.
5967 * extra: `term` uses terminfo now, is more correct.
5968 * extra: `arc` functions converted to methods.
5969 * extra: Implementation of fixed output size variations of SHA-2.
5972 * `unused_variable` lint mode for unused variables (default: warn).
5973 * `unused_unsafe` lint mode for detecting unnecessary `unsafe` blocks
5975 * `unused_mut` lint mode for identifying unused `mut` qualifiers
5977 * `dead_assignment` lint mode for unread variables (default: warn).
5978 * `unnecessary_allocation` lint mode detects some heap allocations that are
5979 immediately borrowed so could be written without allocating (default: warn).
5980 * `missing_doc` lint mode (default: allow).
5981 * `unreachable_code` lint mode (default: warn).
5982 * The `rusti` command has been rewritten and a number of bugs addressed.
5983 * rustc outputs in color on more terminals.
5984 * rustc accepts a `--link-args` flag to pass arguments to the linker.
5985 * rustc accepts a `-Z print-link-args` flag for debugging linkage.
5986 * Compiling with `-g` will make the binary record information about
5987 dynamic borrowcheck failures for debugging.
5988 * rustdoc has a nicer stylesheet.
5989 * Various improvements to rustdoc.
5990 * Improvements to rustpkg (see the detailed release notes).
5993 Version 0.6 (2013-04-03)
5994 ========================
5996 * ~2100 changes, numerous bugfixes
5999 * The self type parameter in traits is now spelled `Self`
6000 * The `self` parameter in trait and impl methods must now be explicitly
6001 named (for example: `fn f(&self) { }`). Implicit self is deprecated.
6002 * Static methods no longer require the `static` keyword and instead
6003 are distinguished by the lack of a `self` parameter
6004 * Replaced the `Durable` trait with the `'static` lifetime
6005 * The old closure type syntax with the trailing sigil has been
6006 removed in favor of the more consistent leading sigil
6007 * `super` is a keyword, and may be prefixed to paths
6008 * Trait bounds are separated with `+` instead of whitespace
6009 * Traits are implemented with `impl Trait for Type`
6010 instead of `impl Type: Trait`
6011 * Lifetime syntax is now `&'l foo` instead of `&l/foo`
6012 * The `export` keyword has finally been removed
6013 * The `move` keyword has been removed (see "Semantic changes")
6014 * The interior mutability qualifier on vectors, `[mut T]`, has been
6015 removed. Use `&mut [T]`, etc.
6016 * `mut` is no longer valid in `~mut T`. Use inherited mutability
6017 * `fail` is no longer a keyword. Use `fail!()`
6018 * `assert` is no longer a keyword. Use `assert!()`
6019 * `log` is no longer a keyword. use `debug!`, etc.
6020 * 1-tuples may be represented as `(T,)`
6021 * Struct fields may no longer be `mut`. Use inherited mutability,
6022 `@mut T`, `core::mut` or `core::cell`
6023 * `extern mod { ... }` is no longer valid syntax for foreign
6024 function modules. Use extern blocks: `extern { ... }`
6025 * Newtype enums removed. Use tuple-structs.
6026 * Trait implementations no longer support visibility modifiers
6027 * Pattern matching over vectors improved and expanded
6028 * `const` renamed to `static` to correspond to lifetime name,
6029 and make room for future `static mut` unsafe mutable globals.
6030 * Replaced `#[deriving_eq]` with `#[deriving(Eq)]`, etc.
6031 * `Clone` implementations can be automatically generated with
6032 `#[deriving(Clone)]`
6033 * Casts to traits must use a pointer sigil, e.g. `@foo as @Bar`
6034 instead of `foo as Bar`.
6035 * Fixed length vector types are now written as `[int, .. 3]`
6036 instead of `[int * 3]`.
6037 * Fixed length vector types can express the length as a constant
6038 expression. (ex: `[int, .. GL_BUFFER_SIZE - 2]`)
6041 * Types with owned pointers or custom destructors move by default,
6042 eliminating the `move` keyword
6043 * All foreign functions are considered unsafe
6044 * &mut is now unaliasable
6045 * Writes to borrowed @mut pointers are prevented dynamically
6047 * The name of the main function can be customized using #[main]
6048 * The default type of an inferred closure is &fn instead of @fn
6049 * `use` statements may no longer be "chained" - they cannot import
6050 identifiers imported by previous `use` statements
6051 * `use` statements are crate relative, importing from the "top"
6052 of the crate by default. Paths may be prefixed with `super::`
6053 or `self::` to change the search behavior.
6054 * Method visibility is inherited from the implementation declaration
6055 * Structural records have been removed
6056 * Many more types can be used in static items, including enums
6057 'static-lifetime pointers and vectors
6058 * Pattern matching over vectors improved and expanded
6059 * Typechecking of closure types has been overhauled to
6060 improve inference and eliminate unsoundness
6061 * Macros leave scope at the end of modules, unless that module is
6062 tagged with #[macro_escape]
6065 * Added big integers to `std::bigint`
6066 * Removed `core::oldcomm` module
6067 * Added pipe-based `core::comm` module
6068 * Numeric traits have been reorganized under `core::num`
6069 * `vec::slice` finally returns a slice
6070 * `debug!` and friends don't require a format string, e.g. `debug!(Foo)`
6071 * Containers reorganized around traits in `core::container`
6072 * `core::dvec` removed, `~[T]` is a drop-in replacement
6073 * `core::send_map` renamed to `core::hashmap`
6074 * `std::map` removed; replaced with `core::hashmap`
6075 * `std::treemap` reimplemented as an owned balanced tree
6076 * `std::deque` and `std::smallintmap` reimplemented as owned containers
6077 * `core::trie` added as a fast ordered map for integer keys
6078 * Set types added to `core::hashmap`, `core::trie` and `std::treemap`
6079 * `Ord` split into `Ord` and `TotalOrd`. `Ord` is still used to
6080 overload the comparison operators, whereas `TotalOrd` is used
6081 by certain container types
6084 * Replaced the 'cargo' package manager with 'rustpkg'
6085 * Added all-purpose 'rust' tool
6086 * `rustc --test` now supports benchmarks with the `#[bench]` attribute
6087 * rustc now *attempts* to offer spelling suggestions
6088 * Improved support for ARM and Android
6089 * Preliminary MIPS backend
6090 * Improved foreign function ABI implementation for x86, x86_64
6091 * Various memory usage improvements
6092 * Rust code may be embedded in foreign code under limited circumstances
6093 * Inline assembler supported by new asm!() syntax extension.
6096 Version 0.5 (2012-12-21)
6097 ===========================
6099 * ~900 changes, numerous bugfixes
6102 * Removed `<-` move operator
6103 * Completed the transition from the `#fmt` extension syntax to `fmt!`
6104 * Removed old fixed length vector syntax - `[T]/N`
6105 * New token-based quasi-quoters, `quote_tokens!`, `quote_expr!`, etc.
6106 * Macros may now expand to items and statements
6107 * `a.b()` is always parsed as a method call, never as a field projection
6108 * `Eq` and `IterBytes` implementations can be automatically generated
6109 with `#[deriving_eq]` and `#[deriving_iter_bytes]` respectively
6110 * Removed the special crate language for `.rc` files
6111 * Function arguments may consist of any irrefutable pattern
6114 * `&` and `~` pointers may point to objects
6115 * Tuple structs - `struct Foo(Bar, Baz)`. Will replace newtype enums.
6116 * Enum variants may be structs
6117 * Destructors can be added to all nominal types with the Drop trait
6118 * Structs and nullary enum variants may be constants
6119 * Values that cannot be implicitly copied are now automatically moved
6120 without writing `move` explicitly
6121 * `&T` may now be coerced to `*T`
6122 * Coercions happen in `let` statements as well as function calls
6123 * `use` statements now take crate-relative paths
6124 * The module and type namespaces have been merged so that static
6125 method names can be resolved under the trait in which they are
6128 * Improved support for language features
6129 * Trait inheritance works in many scenarios
6130 * More support for explicit self arguments in methods - `self`, `&self`
6131 `@self`, and `~self` all generally work as expected
6132 * Static methods work in more situations
6133 * Experimental: Traits may declare default methods for the implementations
6137 * New condition handling system in `core::condition`
6138 * Timsort added to `std::sort`
6139 * New priority queue, `std::priority_queue`
6140 * Pipes for serializable types, `std::flatpipes'
6141 * Serialization overhauled to be trait-based
6142 * Expanded `getopts` definitions
6143 * Moved futures to `std`
6144 * More functions are pure now
6145 * `core::comm` renamed to `oldcomm`. Still deprecated
6146 * `rustdoc` and `cargo` are libraries now
6149 * Added a preliminary REPL, `rusti`
6150 * License changed from MIT to dual MIT/APL2
6153 Version 0.4 (2012-10-15)
6154 ==========================
6156 * ~2000 changes, numerous bugfixes
6159 * All keywords are now strict and may not be used as identifiers anywhere
6160 * Keyword removal: 'again', 'import', 'check', 'new', 'owned', 'send',
6161 'of', 'with', 'to', 'class'.
6162 * Classes are replaced with simpler structs
6163 * Explicit method self types
6164 * `ret` became `return` and `alt` became `match`
6165 * `import` is now `use`; `use is now `extern mod`
6166 * `extern mod { ... }` is now `extern { ... }`
6167 * `use mod` is the recommended way to import modules
6168 * `pub` and `priv` replace deprecated export lists
6169 * The syntax of `match` pattern arms now uses fat arrow (=>)
6170 * `main` no longer accepts an args vector; use `os::args` instead
6173 * Trait implementations are now coherent, ala Haskell typeclasses
6174 * Trait methods may be static
6175 * Argument modes are deprecated
6176 * Borrowed pointers are much more mature and recommended for use
6177 * Strings and vectors in the static region are stored in constant memory
6178 * Typestate was removed
6179 * Resolution rewritten to be more reliable
6180 * Support for 'dual-mode' data structures (freezing and thawing)
6183 * Most binary operators can now be overloaded via the traits in
6185 * `std::net::url` for representing URLs
6186 * Sendable hash maps in `core::send_map`
6187 * `core::task' gained a (currently unsafe) task-local storage API
6190 * An efficient new intertask communication primitive called the pipe,
6191 along with a number of higher-level channel types, in `core::pipes`
6192 * `std::arc`, an atomically reference counted, immutable, shared memory
6194 * `std::sync`, various exotic synchronization tools based on arcs and pipes
6195 * Futures are now based on pipes and sendable
6196 * More robust linked task failure
6197 * Improved task builder API
6200 * Improved error reporting
6201 * Preliminary JIT support
6202 * Preliminary work on precise GC
6203 * Extensive architectural improvements to rustc
6204 * Begun a transition away from buggy C++-based reflection (shape) code to
6205 Rust-based (visitor) code
6206 * All hash functions and tables converted to secure, randomized SipHash
6209 Version 0.3 (2012-07-12)
6210 ========================
6212 * ~1900 changes, numerous bugfixes
6214 * New coding conveniences
6215 * Integer-literal suffix inference
6216 * Per-item control over warnings, errors
6217 * #[cfg(windows)] and #[cfg(unix)] attributes
6218 * Documentation comments
6219 * More compact closure syntax
6220 * 'do' expressions for treating higher-order functions as
6222 * *-patterns (wildcard extended to all constructor fields)
6225 * Name resolution pass and exhaustiveness checker rewritten
6226 * Region pointers and borrow checking supersede alias
6228 * Init-ness checking is now provided by a region-based liveness
6229 pass instead of the typestate pass; same for last-use analysis
6230 * Extensive work on region pointers
6232 * Experimental new language features
6233 * Slices and fixed-size, interior-allocated vectors
6234 * #!-comments for lang versioning, shell execution
6235 * Destructors and iface implementation for classes;
6236 type-parameterized classes and class methods
6237 * 'const' type kind for types that can be used to implement
6238 shared-memory concurrency patterns
6242 * Removal of various obsolete features
6243 * Keywords: 'be', 'prove', 'syntax', 'note', 'mutable', 'bind',
6244 'crust', 'native' (now 'extern'), 'cont' (now 'again')
6246 * Constructs: do-while loops ('do' repurposed), fn binding,
6247 resources (replaced by destructors)
6249 * Compiler reorganization
6250 * Syntax-layer of compiler split into separate crate
6251 * Clang (from LLVM project) integrated into build
6252 * Typechecker split into sub-modules
6255 * New time functions
6256 * Extension methods for many built-in types
6257 * Arc: atomic-refcount read-only / exclusive-use shared cells
6258 * Par: parallel map and search routines
6259 * Extensive work on libuv interface
6260 * Much vector code moved to libraries
6261 * Syntax extensions: #line, #col, #file, #mod, #stringify,
6262 #include, #include_str, #include_bin
6265 * Cargo automatically resolves dependencies
6268 Version 0.2 (2012-03-29)
6269 =========================
6271 * >1500 changes, numerous bugfixes
6273 * New docs and doc tooling
6275 * New port: FreeBSD x86_64
6277 * Compilation model enhancements
6278 * Generics now specialized, multiply instantiated
6279 * Functions now inlined across separate crates
6281 * Scheduling, stack and threading fixes
6282 * Noticeably improved message-passing performance
6283 * Explicit schedulers
6287 * Experimental new language features
6288 * Operator overloading
6292 * Various language extensions
6293 * C-callback function types: 'crust fn ...'
6294 * Infinite-loop construct: 'loop { ... }'
6295 * Shorten 'mutable' to 'mut'
6296 * Required mutable-local qualifier: 'let mut ...'
6297 * Basic glob-exporting: 'export foo::*;'
6298 * Alt now exhaustive, 'alt check' for runtime-checked
6299 * Block-function form of 'for' loop, with 'break' and 'ret'.
6302 * AST quasi-quote syntax extension
6303 * Revived libuv interface
6304 * New modules: core::{future, iter}, std::arena
6305 * Merged per-platform std::{os*, fs*} to core::{libc, os}
6306 * Extensive cleanup, regularization in libstd, libcore
6309 Version 0.1 (2012-01-20)
6310 ===============================
6312 * Most language features work, including:
6313 * Unique pointers, unique closures, move semantics
6314 * Interface-constrained generics
6315 * Static interface dispatch
6317 * Multithread task scheduling
6318 * Typestate predicates
6319 * Failure unwinding, destructors
6320 * Pattern matching and destructuring assignment
6321 * Lightweight block-lambda syntax
6322 * Preliminary macro-by-example
6324 * Compiler works with the following configurations:
6325 * Linux: x86 and x86_64 hosts and targets
6326 * macOS: x86 and x86_64 hosts and targets
6327 * Windows: x86 hosts and targets
6329 * Cross compilation / multi-target configuration supported.
6331 * Preliminary API-documentation and package-management tools included.
6335 * Documentation is incomplete.
6337 * Performance is below intended target.
6339 * Standard library APIs are subject to extensive change, reorganization.
6341 * Language-level versioning is not yet operational - future code will