1 Version 1.26.0 (2018-05-10)
2 ==========================
6 - [Closures now implement `Copy` and/or `Clone` if all captured variables
7 implement either or both traits.][49299]
8 - [The inclusive range syntax e.g. `for x in 0..=10` is now stable.][47813]
9 - [Stablise `'_`. The underscore lifetime can be used anywhere where a
10 lifetime can be elided.][49458]
11 - [`impl Trait` is now stable allowing you to have abstract types in returns
12 or in function parameters.][49255] e.g. `fn foo() -> impl Iterator<Item=u8>` or
13 `fn open(path: impl AsRef<Path>)`.
14 - [Pattern matching will now automatically apply dereferences.][49394]
15 - [128-bit integers in the form of `u128` and `i128` are now stable.][49101]
16 - [`main` can now return `Result<(), E: Debug>`][49162] in addition to `()`.
17 - [A lot of operations are now available in a const context.][46882] E.g. You
18 can now index into constant arrays, reference and dereference into constants,
19 and use Tuple struct constructors.
20 - [Fixed entry slice patterns are now stable.][48516] e.g.
22 let points = [1, 2, 3, 4];
24 [1, 2, 3, 4] => println!("All points were sequential."),
25 _ => println!("Not all points were sequential."),
32 - [LLD is now used as the default linker for `wasm32-unknown-unknown`.][48125]
33 - [Fixed exponential projection complexity on nested types.][48296]
34 This can provide up to a ~12% reduction in compile times for certain crates.
35 - [Added the `--remap-path-prefix` option to rustc.][48359] Allowing you
36 to remap path prefixes outputted by the compiler.
37 - [Added `powerpc-unknown-netbsd` target.][48281]
41 - [Implemented `From<u16> for usize` & `From<{u8, i16}> for isize`.][49305]
42 - [Added hexadecimal formatting for integers with fmt::Debug][48978]
43 e.g. `assert!(format!("{:02x?}", b"Foo\0") == "[46, 6f, 6f, 00]")`
44 - [Implemented `Default, Hash` for `cmp::Reverse`.][48628]
45 - [Optimized `str::repeat` being 8x faster in large cases.][48657]
46 - [`ascii::escape_default` is now available in libcore.][48735]
47 - [Trailing commas are now supported in std and core macros.][48056]
48 - [Implemented `Copy, Clone` for `cmp::Reverse`][47379]
49 - [Implemented `Clone` for `char::{ToLowercase, ToUppercase}`.][48629]
54 - [`*const T::copy_to_nonoverlapping`]
55 - [`*const T::copy_to`]
56 - [`*const T::read_unaligned`]
57 - [`*const T::read_volatile`]
60 - [`*const T::wrapping_add`]
61 - [`*const T::wrapping_sub`]
63 - [`*mut T::copy_to_nonoverlapping`]
65 - [`*mut T::read_unaligned`]
66 - [`*mut T::read_volatile`]
71 - [`*mut T::wrapping_add`]
72 - [`*mut T::wrapping_sub`]
73 - [`*mut T::write_bytes`]
74 - [`*mut T::write_unaligned`]
75 - [`*mut T::write_volatile`]
78 - [`FromUtf8Error::as_bytes`]
79 - [`LocalKey::try_with`]
81 - [`btree_map::Entry::and_modify`]
82 - [`fs::read_to_string`]
85 - [`hash_map::Entry::and_modify`]
86 - [`iter::FusedIterator`]
87 - [`ops::RangeInclusive`]
88 - [`ops::RangeToInclusive`]
90 - [`slice::rotate_left`]
91 - [`slice::rotate_right`]
97 - [Cargo will now output path to custom commands when `-v` is
98 passed with `--list`][cargo/5041]
99 - [The Cargo binary version is now the same as the Rust version][cargo/5083]
100 - [`Cargo.lock` files are now included in published crates.][cargo/5093]
104 - [The second edition of "The Rust Programming Language" book is now recommended
105 over the first.][48404]
110 - [aliasing a `Fn` trait as `dyn` no longer works.][48481] E.g. the following
111 syntax is now invalid.
113 use std::ops::Fn as dyn;
114 fn g(_: Box<dyn(std::fmt::Debug)>) {}
116 - [The result of dereferences are no longer promoted to `'static`.][47408]
120 const PAIR: &(i32, i32) = &(0, 1);
121 let _reversed_pair: &'static _ = &(PAIR.1, PAIR.0); // Doesn't work
124 - [Deprecate `AsciiExt` trait in favor of inherent methods.][49109]
125 - [`".e0"` will now no longer parse as `0.0` and will instead cause
127 - [Removed hoedown from rustdoc.][48274]
128 - [Bounds on higher-kinded lifetimes a hard error.][48326]
130 [46882]: https://github.com/rust-lang/rust/pull/46882
131 [47379]: https://github.com/rust-lang/rust/pull/47379
132 [47408]: https://github.com/rust-lang/rust/pull/47408
133 [47813]: https://github.com/rust-lang/rust/pull/47813
134 [48056]: https://github.com/rust-lang/rust/pull/48056
135 [48125]: https://github.com/rust-lang/rust/pull/48125
136 [48166]: https://github.com/rust-lang/rust/pull/48166
137 [48235]: https://github.com/rust-lang/rust/pull/48235
138 [48274]: https://github.com/rust-lang/rust/pull/48274
139 [48281]: https://github.com/rust-lang/rust/pull/48281
140 [48296]: https://github.com/rust-lang/rust/pull/48296
141 [48326]: https://github.com/rust-lang/rust/pull/48326
142 [48359]: https://github.com/rust-lang/rust/pull/48359
143 [48404]: https://github.com/rust-lang/rust/pull/48404
144 [48481]: https://github.com/rust-lang/rust/pull/48481
145 [48516]: https://github.com/rust-lang/rust/pull/48516
146 [48628]: https://github.com/rust-lang/rust/pull/48628
147 [48629]: https://github.com/rust-lang/rust/pull/48629
148 [48657]: https://github.com/rust-lang/rust/pull/48657
149 [48735]: https://github.com/rust-lang/rust/pull/48735
150 [48978]: https://github.com/rust-lang/rust/pull/48978
151 [49101]: https://github.com/rust-lang/rust/pull/49101
152 [49109]: https://github.com/rust-lang/rust/pull/49109
153 [49121]: https://github.com/rust-lang/rust/pull/49121
154 [49162]: https://github.com/rust-lang/rust/pull/49162
155 [49184]: https://github.com/rust-lang/rust/pull/49184
156 [49234]: https://github.com/rust-lang/rust/pull/49234
157 [49255]: https://github.com/rust-lang/rust/pull/49255
158 [49299]: https://github.com/rust-lang/rust/pull/49299
159 [49305]: https://github.com/rust-lang/rust/pull/49305
160 [49394]: https://github.com/rust-lang/rust/pull/49394
161 [49458]: https://github.com/rust-lang/rust/pull/49458
162 [`*const T::add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.add
163 [`*const T::copy_to_nonoverlapping`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to_nonoverlapping
164 [`*const T::copy_to`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to
165 [`*const T::read_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_unaligned
166 [`*const T::read_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_volatile
167 [`*const T::read`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read
168 [`*const T::sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.sub
169 [`*const T::wrapping_add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_add
170 [`*const T::wrapping_sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_sub
171 [`*mut T::add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.add-1
172 [`*mut T::copy_to_nonoverlapping`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to_nonoverlapping-1
173 [`*mut T::copy_to`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to-1
174 [`*mut T::read_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_unaligned-1
175 [`*mut T::read_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_volatile-1
176 [`*mut T::read`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read-1
177 [`*mut T::replace`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.replace
178 [`*mut T::sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.sub-1
179 [`*mut T::swap`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.swap
180 [`*mut T::wrapping_add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_add-1
181 [`*mut T::wrapping_sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_sub-1
182 [`*mut T::write_bytes`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_bytes
183 [`*mut T::write_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_unaligned
184 [`*mut T::write_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_volatile
185 [`*mut T::write`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write
186 [`Box::leak`]: https://doc.rust-lang.org/std/boxed/struct.Box.html#method.leak
187 [`FromUtf8Error::as_bytes`]: https://doc.rust-lang.org/std/string/struct.FromUtf8Error.html#method.as_bytes
188 [`LocalKey::try_with`]: https://doc.rust-lang.org/std/thread/struct.LocalKey.html#method.try_with
189 [`Option::cloned`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.cloned
190 [`btree_map::Entry::and_modify`]: https://doc.rust-lang.org/std/collections/btree_map/enum.Entry.html#method.and_modify
191 [`fs::read_to_string`]: https://doc.rust-lang.org/std/fs/fn.read_to_string.html
192 [`fs::read`]: https://doc.rust-lang.org/std/fs/fn.read.html
193 [`fs::write`]: https://doc.rust-lang.org/std/fs/fn.write.html
194 [`hash_map::Entry::and_modify`]: https://doc.rust-lang.org/std/collections/hash_map/enum.Entry.html#method.and_modify
195 [`iter::FusedIterator`]: https://doc.rust-lang.org/std/iter/trait.FusedIterator.html
196 [`ops::RangeInclusive`]: https://doc.rust-lang.org/std/ops/struct.RangeInclusive.html
197 [`ops::RangeToInclusive`]: https://doc.rust-lang.org/std/ops/struct.RangeToInclusive.html
198 [`process::id`]: https://doc.rust-lang.org/std/process/fn.id.html
199 [`slice::rotate_left`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rotate_left
200 [`slice::rotate_right`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rotate_right
201 [`String::retain`]: https://doc.rust-lang.org/std/string/struct.String.html#method.retain
202 [cargo/5041]: https://github.com/rust-lang/cargo/pull/5041
203 [cargo/5083]: https://github.com/rust-lang/cargo/pull/5083
204 [cargo/5093]: https://github.com/rust-lang/cargo/pull/5093
207 Version 1.25.0 (2018-03-29)
208 ==========================
212 - [Stabilised `#[repr(align(x))]`.][47006] [RFC 1358]
213 - [You can now use nested groups of imports.][47948]
214 e.g. `use std::{fs::File, io::Read, path::{Path, PathBuf}};`
215 - [You can now have `|` at the start of a match arm.][47947] e.g.
223 | Foo::B => println!("AB"),
224 | Foo::C => println!("C"),
231 - [Upgraded to LLVM 6.][47828]
232 - [Added `-C lto=val` option.][47521]
233 - [Added `i586-unknown-linux-musl` target][47282]
237 - [Impl Send for `process::Command` on Unix.][47760]
238 - [Impl PartialEq and Eq for `ParseCharError`.][47790]
239 - [`UnsafeCell::into_inner` is now safe.][47204]
240 - [Implement libstd for CloudABI.][47268]
241 - [`Float::{from_bits, to_bits}` is now available in libcore.][46931]
242 - [Implement `AsRef<Path>` for Component][46985]
243 - [Implemented `Write` for `Cursor<&mut Vec<u8>>`][46830]
244 - [Moved `Duration` to libcore.][46666]
248 - [`Location::column`]
251 The following functions can now be used in a constant expression.
252 eg. `static MINUTE: Duration = Duration::from_secs(60);`
253 - [`Duration::new`][47300]
254 - [`Duration::from_secs`][47300]
255 - [`Duration::from_millis`][47300]
259 - [`cargo new` no longer removes `rust` or `rs` prefixs/suffixs.][cargo/5013]
260 - [`cargo new` now defaults to creating a binary crate, instead of a
261 library crate.][cargo/5029]
265 - [Rust by example is now shipped with new releases][46196]
269 - [Deprecated `net::lookup_host`.][47510]
270 - [`rustdoc` has switched to pulldown as the default markdown renderer.][47398]
271 - The borrow checker was sometimes incorrectly permitting overlapping borrows
272 around indexing operations (see [#47349][47349]). This has been fixed (which also
273 enabled some correct code that used to cause errors (e.g. [#33903][33903] and [#46095][46095]).
274 - [Removed deprecated unstable attribute `#[simd]`.][47251]
276 [33903]: https://github.com/rust-lang/rust/pull/33903
277 [47947]: https://github.com/rust-lang/rust/pull/47947
278 [47948]: https://github.com/rust-lang/rust/pull/47948
279 [47760]: https://github.com/rust-lang/rust/pull/47760
280 [47790]: https://github.com/rust-lang/rust/pull/47790
281 [47828]: https://github.com/rust-lang/rust/pull/47828
282 [47398]: https://github.com/rust-lang/rust/pull/47398
283 [47510]: https://github.com/rust-lang/rust/pull/47510
284 [47521]: https://github.com/rust-lang/rust/pull/47521
285 [47204]: https://github.com/rust-lang/rust/pull/47204
286 [47251]: https://github.com/rust-lang/rust/pull/47251
287 [47268]: https://github.com/rust-lang/rust/pull/47268
288 [47282]: https://github.com/rust-lang/rust/pull/47282
289 [47300]: https://github.com/rust-lang/rust/pull/47300
290 [47349]: https://github.com/rust-lang/rust/pull/47349
291 [46931]: https://github.com/rust-lang/rust/pull/46931
292 [46985]: https://github.com/rust-lang/rust/pull/46985
293 [47006]: https://github.com/rust-lang/rust/pull/47006
294 [46830]: https://github.com/rust-lang/rust/pull/46830
295 [46095]: https://github.com/rust-lang/rust/pull/46095
296 [46666]: https://github.com/rust-lang/rust/pull/46666
297 [46196]: https://github.com/rust-lang/rust/pull/46196
298 [cargo/5013]: https://github.com/rust-lang/cargo/pull/5013
299 [cargo/5029]: https://github.com/rust-lang/cargo/pull/5029
300 [RFC 1358]: https://github.com/rust-lang/rfcs/pull/1358
301 [`Location::column`]: https://doc.rust-lang.org/std/panic/struct.Location.html#method.column
302 [`ptr::NonNull`]: https://doc.rust-lang.org/std/ptr/struct.NonNull.html
305 Version 1.24.1 (2018-03-01)
306 ==========================
308 - [Do not abort when unwinding through FFI][48251]
309 - [Emit UTF-16 files for linker arguments on Windows][48318]
310 - [Make the error index generator work again][48308]
311 - [Cargo will warn on Windows 7 if an update is needed][cargo/5069].
313 [48251]: https://github.com/rust-lang/rust/issues/48251
314 [48308]: https://github.com/rust-lang/rust/issues/48308
315 [48318]: https://github.com/rust-lang/rust/issues/48318
316 [cargo/5069]: https://github.com/rust-lang/cargo/pull/5069
319 Version 1.24.0 (2018-02-15)
320 ==========================
324 - [External `sysv64` ffi is now available.][46528]
325 eg. `extern "sysv64" fn foo () {}`
329 - [rustc now uses 16 codegen units by default for release builds.][46910]
330 For the fastest builds, utilize `codegen-units=1`.
331 - [Added `armv4t-unknown-linux-gnueabi` target.][47018]
332 - [Add `aarch64-unknown-openbsd` support][46760]
336 - [`str::find::<char>` now uses memchr.][46735] This should lead to a 10x
337 improvement in performance in the majority of cases.
338 - [`OsStr`'s `Debug` implementation is now lossless and consistent
339 with Windows.][46798]
340 - [`time::{SystemTime, Instant}` now implement `Hash`.][46828]
341 - [impl `From<bool>` for `AtomicBool`][46293]
342 - [impl `From<{CString, &CStr}>` for `{Arc<CStr>, Rc<CStr>}`][45990]
343 - [impl `From<{OsString, &OsStr}>` for `{Arc<OsStr>, Rc<OsStr>}`][45990]
344 - [impl `From<{PathBuf, &Path}>` for `{Arc<Path>, Rc<Path>}`][45990]
345 - [float::from_bits now just uses transmute.][46012] This provides
346 some optimisations from LLVM.
347 - [Copied `AsciiExt` methods onto `char`][46077]
348 - [Remove `T: Sized` requirement on `ptr::is_null()`][46094]
349 - [impl `From<RecvError>` for `{TryRecvError, RecvTimeoutError}`][45506]
350 - [Optimised `f32::{min, max}` to generate more efficient x86 assembly][47080]
351 - [`[u8]::contains` now uses memchr which provides a 3x speed improvement][46713]
355 - [`RefCell::replace`]
357 - [`atomic::spin_loop_hint`]
359 The following functions can now be used in a constant expression.
360 eg. `let buffer: [u8; size_of::<usize>()];`, `static COUNTER: AtomicUsize = AtomicUsize::new(1);`
362 - [`AtomicBool::new`][46287]
363 - [`AtomicUsize::new`][46287]
364 - [`AtomicIsize::new`][46287]
365 - [`AtomicPtr::new`][46287]
366 - [`Cell::new`][46287]
367 - [`{integer}::min_value`][46287]
368 - [`{integer}::max_value`][46287]
369 - [`mem::size_of`][46287]
370 - [`mem::align_of`][46287]
371 - [`ptr::null`][46287]
372 - [`ptr::null_mut`][46287]
373 - [`RefCell::new`][46287]
374 - [`UnsafeCell::new`][46287]
378 - [Added a `workspace.default-members` config that
379 overrides implied `--all` in virtual workspaces.][cargo/4743]
380 - [Enable incremental by default on development builds.][cargo/4817] Also added
381 configuration keys to `Cargo.toml` and `.cargo/config` to disable on a
382 per-project or global basis respectively.
389 - [Floating point types `Debug` impl now always prints a decimal point.][46831]
390 - [`Ipv6Addr` now rejects superfluous `::`'s in IPv6 addresses][46671] This is
391 in accordance with IETF RFC 4291 §2.2.
392 - [Unwinding will no longer go past FFI boundaries, and will instead abort.][46833]
393 - [`Formatter::flags` method is now deprecated.][46284] The `sign_plus`,
394 `sign_minus`, `alternate`, and `sign_aware_zero_pad` should be used instead.
395 - [Leading zeros in tuple struct members is now an error][47084]
396 - [`column!()` macro is one-based instead of zero-based][46977]
397 - [`fmt::Arguments` can no longer be shared across threads][45198]
398 - [Access to `#[repr(packed)]` struct fields is now unsafe][44884]
399 - [Cargo sets a different working directory for the compiler][cargo/4788]
401 [44884]: https://github.com/rust-lang/rust/pull/44884
402 [45198]: https://github.com/rust-lang/rust/pull/45198
403 [45506]: https://github.com/rust-lang/rust/pull/45506
404 [45904]: https://github.com/rust-lang/rust/pull/45904
405 [45990]: https://github.com/rust-lang/rust/pull/45990
406 [46012]: https://github.com/rust-lang/rust/pull/46012
407 [46077]: https://github.com/rust-lang/rust/pull/46077
408 [46094]: https://github.com/rust-lang/rust/pull/46094
409 [46284]: https://github.com/rust-lang/rust/pull/46284
410 [46287]: https://github.com/rust-lang/rust/pull/46287
411 [46293]: https://github.com/rust-lang/rust/pull/46293
412 [46528]: https://github.com/rust-lang/rust/pull/46528
413 [46671]: https://github.com/rust-lang/rust/pull/46671
414 [46713]: https://github.com/rust-lang/rust/pull/46713
415 [46735]: https://github.com/rust-lang/rust/pull/46735
416 [46749]: https://github.com/rust-lang/rust/pull/46749
417 [46760]: https://github.com/rust-lang/rust/pull/46760
418 [46798]: https://github.com/rust-lang/rust/pull/46798
419 [46828]: https://github.com/rust-lang/rust/pull/46828
420 [46831]: https://github.com/rust-lang/rust/pull/46831
421 [46833]: https://github.com/rust-lang/rust/pull/46833
422 [46910]: https://github.com/rust-lang/rust/pull/46910
423 [46977]: https://github.com/rust-lang/rust/pull/46977
424 [47018]: https://github.com/rust-lang/rust/pull/47018
425 [47080]: https://github.com/rust-lang/rust/pull/47080
426 [47084]: https://github.com/rust-lang/rust/pull/47084
427 [cargo/4743]: https://github.com/rust-lang/cargo/pull/4743
428 [cargo/4788]: https://github.com/rust-lang/cargo/pull/4788
429 [cargo/4817]: https://github.com/rust-lang/cargo/pull/4817
430 [`RefCell::replace`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.replace
431 [`RefCell::swap`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.swap
432 [`atomic::spin_loop_hint`]: https://doc.rust-lang.org/std/sync/atomic/fn.spin_loop_hint.html
435 Version 1.23.0 (2018-01-04)
436 ==========================
440 - [Arbitrary `auto` traits are now permitted in trait objects.][45772]
441 - [rustc now uses subtyping on the left hand side of binary operations.][45435]
442 Which should fix some confusing errors in some operations.
446 - [Enabled `TrapUnreachable` in LLVM which should mitigate the impact of
447 undefined behaviour.][45920]
448 - [rustc now suggests renaming import if names clash.][45660]
449 - [Display errors/warnings correctly when there are zero-width or
450 wide characters.][45711]
451 - [rustc now avoids unnecessary copies of arguments that are
452 simple bindings][45380] This should improve memory usage on average by 5-10%.
453 - [Updated musl used to build musl rustc to 1.1.17][45393]
457 - [Allow a trailing comma in `assert_eq/ne` macro][45887]
458 - [Implement Hash for raw pointers to unsized types][45483]
459 - [impl `From<*mut T>` for `AtomicPtr<T>`][45610]
460 - [impl `From<usize/isize>` for `AtomicUsize/AtomicIsize`.][45610]
461 - [Removed the `T: Sync` requirement for `RwLock<T>: Send`][45267]
462 - [Removed `T: Sized` requirement for `{<*const T>, <*mut T>}::as_ref`
463 and `<*mut T>::as_mut`][44932]
464 - [Optimized `Thread::{park, unpark}` implementation][45524]
465 - [Improved `SliceExt::binary_search` performance.][45333]
466 - [impl `FromIterator<()>` for `()`][45379]
467 - [Copied `AsciiExt` trait methods to primitive types.][44042] Use of `AsciiExt`
475 - [Cargo now supports uninstallation of multiple packages][cargo/4561]
476 eg. `cargo uninstall foo bar` uninstalls `foo` and `bar`.
477 - [Added unit test checking to `cargo check`][cargo/4592]
478 - [Cargo now lets you install a specific version
479 using `cargo install --version`][cargo/4637]
483 - [Releases now ship with the Cargo book documentation.][45692]
484 - [rustdoc now prints rendering warnings on every run.][45324]
488 - [Changes have been made to type equality to make it more correct,
489 in rare cases this could break some code.][45853] [Tracking issue for
490 further information][45852]
491 - [`char::escape_debug` now uses Unicode 10 over 9.][45571]
492 - [Upgraded Android SDK to 27, and NDK to r15c.][45580] This drops support for
493 Android 9, the minimum supported version is Android 14.
494 - [Bumped the minimum LLVM to 3.9][45326]
496 [44042]: https://github.com/rust-lang/rust/pull/44042
497 [44932]: https://github.com/rust-lang/rust/pull/44932
498 [45267]: https://github.com/rust-lang/rust/pull/45267
499 [45324]: https://github.com/rust-lang/rust/pull/45324
500 [45326]: https://github.com/rust-lang/rust/pull/45326
501 [45333]: https://github.com/rust-lang/rust/pull/45333
502 [45379]: https://github.com/rust-lang/rust/pull/45379
503 [45380]: https://github.com/rust-lang/rust/pull/45380
504 [45393]: https://github.com/rust-lang/rust/pull/45393
505 [45435]: https://github.com/rust-lang/rust/pull/45435
506 [45483]: https://github.com/rust-lang/rust/pull/45483
507 [45524]: https://github.com/rust-lang/rust/pull/45524
508 [45571]: https://github.com/rust-lang/rust/pull/45571
509 [45580]: https://github.com/rust-lang/rust/pull/45580
510 [45610]: https://github.com/rust-lang/rust/pull/45610
511 [45660]: https://github.com/rust-lang/rust/pull/45660
512 [45692]: https://github.com/rust-lang/rust/pull/45692
513 [45711]: https://github.com/rust-lang/rust/pull/45711
514 [45772]: https://github.com/rust-lang/rust/pull/45772
515 [45852]: https://github.com/rust-lang/rust/issues/45852
516 [45853]: https://github.com/rust-lang/rust/pull/45853
517 [45887]: https://github.com/rust-lang/rust/pull/45887
518 [45920]: https://github.com/rust-lang/rust/pull/45920
519 [cargo/4561]: https://github.com/rust-lang/cargo/pull/4561
520 [cargo/4592]: https://github.com/rust-lang/cargo/pull/4592
521 [cargo/4637]: https://github.com/rust-lang/cargo/pull/4637
524 Version 1.22.1 (2017-11-22)
525 ==========================
527 - [Update Cargo to fix an issue with macOS 10.13 "High Sierra"][46183]
529 [46183]: https://github.com/rust-lang/rust/pull/46183
531 Version 1.22.0 (2017-11-22)
532 ==========================
536 - [`non_snake_case` lint now allows extern no-mangle functions][44966]
537 - [Now accepts underscores in unicode escapes][43716]
538 - [`T op= &T` now works for numeric types.][44287] eg. `let mut x = 2; x += &8;`
539 - [types that impl `Drop` are now allowed in `const` and `static` types][44456]
543 - [rustc now defaults to having 16 codegen units at debug on supported platforms.][45064]
544 - [rustc will no longer inline in codegen units when compiling for debug][45075]
545 This should decrease compile times for debug builds.
546 - [strict memory alignment now enabled on ARMv6][45094]
547 - [Remove support for the PNaCl target `le32-unknown-nacl`][45041]
551 - [Allow atomic operations up to 32 bits
552 on `armv5te_unknown_linux_gnueabi`][44978]
553 - [`Box<Error>` now impls `From<Cow<str>>`][44466]
554 - [`std::mem::Discriminant` is now guaranteed to be `Send + Sync`][45095]
555 - [`fs::copy` now returns the length of the main stream on NTFS.][44895]
556 - [Properly detect overflow in `Instant += Duration`.][44220]
557 - [impl `Hasher` for `{&mut Hasher, Box<Hasher>}`][44015]
558 - [impl `fmt::Debug` for `SplitWhitespace`.][44303]
559 - [`Option<T>` now impls `Try`][42526] This allows for using `?` with `Option` types.
566 - [Cargo will now build multi file examples in subdirectories of the `examples`
567 folder that have a `main.rs` file.][cargo/4496]
568 - [Changed `[root]` to `[package]` in `Cargo.lock`][cargo/4571] Packages with
569 the old format will continue to work and can be updated with `cargo update`.
570 - [Now supports vendoring git repositories][cargo/3992]
574 - [`libbacktrace` is now available on Apple platforms.][44251]
575 - [Stabilised the `compile_fail` attribute for code fences in doc-comments.][43949]
576 This now lets you specify that a given code example will fail to compile.
580 - [The minimum Android version that rustc can build for has been bumped
581 to `4.0` from `2.3`][45656]
582 - [Allowing `T op= &T` for numeric types has broken some type
583 inference cases][45480]
586 [42526]: https://github.com/rust-lang/rust/pull/42526
587 [43017]: https://github.com/rust-lang/rust/pull/43017
588 [43716]: https://github.com/rust-lang/rust/pull/43716
589 [43949]: https://github.com/rust-lang/rust/pull/43949
590 [44015]: https://github.com/rust-lang/rust/pull/44015
591 [44220]: https://github.com/rust-lang/rust/pull/44220
592 [44251]: https://github.com/rust-lang/rust/pull/44251
593 [44287]: https://github.com/rust-lang/rust/pull/44287
594 [44303]: https://github.com/rust-lang/rust/pull/44303
595 [44456]: https://github.com/rust-lang/rust/pull/44456
596 [44466]: https://github.com/rust-lang/rust/pull/44466
597 [44895]: https://github.com/rust-lang/rust/pull/44895
598 [44966]: https://github.com/rust-lang/rust/pull/44966
599 [44978]: https://github.com/rust-lang/rust/pull/44978
600 [45041]: https://github.com/rust-lang/rust/pull/45041
601 [45064]: https://github.com/rust-lang/rust/pull/45064
602 [45075]: https://github.com/rust-lang/rust/pull/45075
603 [45094]: https://github.com/rust-lang/rust/pull/45094
604 [45095]: https://github.com/rust-lang/rust/pull/45095
605 [45480]: https://github.com/rust-lang/rust/issues/45480
606 [45656]: https://github.com/rust-lang/rust/pull/45656
607 [cargo/3992]: https://github.com/rust-lang/cargo/pull/3992
608 [cargo/4496]: https://github.com/rust-lang/cargo/pull/4496
609 [cargo/4571]: https://github.com/rust-lang/cargo/pull/4571
616 Version 1.21.0 (2017-10-12)
617 ==========================
621 - [You can now use static references for literals.][43838]
625 let x: &'static u32 = &0;
628 - [Relaxed path syntax. Optional `::` before `<` is now allowed in all contexts.][43540]
631 my_macro!(Vec<i32>::new); // Always worked
632 my_macro!(Vec::<i32>::new); // Now works
637 - [Upgraded jemalloc to 4.5.0][43911]
638 - [Enabled unwinding panics on Redox][43917]
639 - [Now runs LLVM in parallel during translation phase.][43506]
640 This should reduce peak memory usage.
644 - [Generate builtin impls for `Clone` for all arrays and tuples that
645 are `T: Clone`][43690]
646 - [`Stdin`, `Stdout`, and `Stderr` now implement `AsRawFd`.][43459]
647 - [`Rc` and `Arc` now implement `From<&[T]> where T: Clone`, `From<str>`,
648 `From<String>`, `From<Box<T>> where T: ?Sized`, and `From<Vec<T>>`.][42565]
653 [`std::mem::discriminant`]
657 - [You can now call `cargo install` with multiple package names][cargo/4216]
658 - [Cargo commands inside a virtual workspace will now implicitly
659 pass `--all`][cargo/4335]
660 - [Added a `[patch]` section to `Cargo.toml` to handle
661 prepublication dependencies][cargo/4123] [RFC 1969]
662 - [`include` & `exclude` fields in `Cargo.toml` now accept gitignore
663 like patterns][cargo/4270]
664 - [Added the `--all-targets` option][cargo/4400]
665 - [Using required dependencies as a feature is now deprecated and emits
666 a warning][cargo/4364]
671 - [Cargo docs are moving][43916]
672 to [doc.rust-lang.org/cargo](https://doc.rust-lang.org/cargo)
673 - [The rustdoc book is now available][43863]
674 at [doc.rust-lang.org/rustdoc](https://doc.rust-lang.org/rustdoc)
675 - [Added a preview of RLS has been made available through rustup][44204]
676 Install with `rustup component add rls-preview`
677 - [`std::os` documentation for Unix, Linux, and Windows now appears on doc.rust-lang.org][43348]
678 Previously only showed `std::os::unix`.
682 - [Changes in method matching against higher-ranked types][43880] This may cause
683 breakage in subtyping corner cases. [A more in-depth explanation is available.][info/43880]
684 - [rustc's JSON error output's byte position start at top of file.][42973]
685 Was previously relative to the rustc's internal `CodeMap` struct which
686 required the unstable library `libsyntax` to correctly use.
687 - [`unused_results` lint no longer ignores booleans][43728]
689 [42565]: https://github.com/rust-lang/rust/pull/42565
690 [42973]: https://github.com/rust-lang/rust/pull/42973
691 [43348]: https://github.com/rust-lang/rust/pull/43348
692 [43459]: https://github.com/rust-lang/rust/pull/43459
693 [43506]: https://github.com/rust-lang/rust/pull/43506
694 [43540]: https://github.com/rust-lang/rust/pull/43540
695 [43690]: https://github.com/rust-lang/rust/pull/43690
696 [43728]: https://github.com/rust-lang/rust/pull/43728
697 [43838]: https://github.com/rust-lang/rust/pull/43838
698 [43863]: https://github.com/rust-lang/rust/pull/43863
699 [43880]: https://github.com/rust-lang/rust/pull/43880
700 [43911]: https://github.com/rust-lang/rust/pull/43911
701 [43916]: https://github.com/rust-lang/rust/pull/43916
702 [43917]: https://github.com/rust-lang/rust/pull/43917
703 [44204]: https://github.com/rust-lang/rust/pull/44204
704 [cargo/4123]: https://github.com/rust-lang/cargo/pull/4123
705 [cargo/4216]: https://github.com/rust-lang/cargo/pull/4216
706 [cargo/4270]: https://github.com/rust-lang/cargo/pull/4270
707 [cargo/4335]: https://github.com/rust-lang/cargo/pull/4335
708 [cargo/4364]: https://github.com/rust-lang/cargo/pull/4364
709 [cargo/4400]: https://github.com/rust-lang/cargo/pull/4400
710 [RFC 1969]: https://github.com/rust-lang/rfcs/pull/1969
711 [info/43880]: https://github.com/rust-lang/rust/issues/44224#issuecomment-330058902
712 [`std::mem::discriminant`]: https://doc.rust-lang.org/std/mem/fn.discriminant.html
714 Version 1.20.0 (2017-08-31)
715 ===========================
719 - [Associated constants are now stabilised.][42809]
720 - [A lot of macro bugs are now fixed.][42913]
725 - [Struct fields are now properly coerced to the expected field type.][42807]
726 - [Enabled wasm LLVM backend][42571] WASM can now be built with the
727 `wasm32-experimental-emscripten` target.
728 - [Changed some of the error messages to be more helpful.][42033]
729 - [Add support for RELRO(RELocation Read-Only) for platforms that support
731 - [rustc now reports the total number of errors on compilation failure][43015]
732 previously this was only the number of errors in the pass that failed.
733 - [Expansion in rustc has been sped up 29x.][42533]
734 - [added `msp430-none-elf` target.][43099]
735 - [rustc will now suggest one-argument enum variant to fix type mismatch when
737 - [Fixes backtraces on Redox][43228]
738 - [rustc now identifies different versions of same crate when absolute paths of
739 different types match in an error message.][42826]
745 - [Relaxed Debug constraints on `{HashMap,BTreeMap}::{Keys,Values}`.][42854]
746 - [Impl `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Debug`, `Hash` for unsized
748 - [Impl `fmt::{Display, Debug}` for `Ref`, `RefMut`, `MutexGuard`,
749 `RwLockReadGuard`, `RwLockWriteGuard`][42822]
750 - [Impl `Clone` for `DefaultHasher`.][42799]
751 - [Impl `Sync` for `SyncSender`.][42397]
752 - [Impl `FromStr` for `char`][42271]
753 - [Fixed how `{f32, f64}::{is_sign_negative, is_sign_positive}` handles
755 - [allow messages in the `unimplemented!()` macro.][42155]
756 ie. `unimplemented!("Waiting for 1.21 to be stable")`
757 - [`pub(restricted)` is now supported in the `thread_local!` macro.][43185]
758 - [Upgrade to Unicode 10.0.0][42999]
759 - [Reimplemented `{f32, f64}::{min, max}` in Rust instead of using CMath.][42430]
760 - [Skip the main thread's manual stack guard on Linux][43072]
761 - [Iterator::nth for `ops::{Range, RangeFrom}` is now done in O(1) time][43077]
762 - [`#[repr(align(N))]` attribute max number is now 2^31 - 1.][43097] This was
764 - [`{OsStr, Path}::Display` now avoids allocations where possible][42613]
769 - [`CStr::into_c_string`]
770 - [`CString::as_c_str`]
771 - [`CString::into_boxed_c_str`]
774 - [`Chain::into_inner`]
775 - [`Option::get_or_insert_with`]
776 - [`Option::get_or_insert`]
777 - [`OsStr::into_os_string`]
778 - [`OsString::into_boxed_os_str`]
781 - [`Utf8Error::error_len`]
782 - [`char::EscapeDebug`]
783 - [`char::escape_debug`]
789 - [`mem::ManuallyDrop`]
790 - [`slice::sort_unstable_by_key`]
791 - [`slice::sort_unstable_by`]
792 - [`slice::sort_unstable`]
793 - [`str::from_boxed_utf8_unchecked`]
794 - [`str::as_bytes_mut`]
795 - [`str::as_bytes_mut`]
796 - [`str::from_utf8_mut`]
797 - [`str::from_utf8_unchecked_mut`]
799 - [`str::get_unchecked_mut`]
800 - [`str::get_unchecked`]
802 - [`str::into_boxed_bytes`]
807 - [Cargo API token location moved from `~/.cargo/config` to
808 `~/.cargo/credentials`.][cargo/3978]
809 - [Cargo will now build `main.rs` binaries that are in sub-directories of
810 `src/bin`.][cargo/4214] ie. Having `src/bin/server/main.rs` and
811 `src/bin/client/main.rs` generates `target/debug/server` and `target/debug/client`
812 - [You can now specify version of a binary when installed through
813 `cargo install` using `--vers`.][cargo/4229]
814 - [Added `--no-fail-fast` flag to cargo to run all benchmarks regardless of
815 failure.][cargo/4248]
816 - [Changed the convention around which file is the crate root.][cargo/4259]
817 - [The `include`/`exclude` property in `Cargo.toml` now accepts gitignore paths
818 instead of glob patterns][cargo/4270]. Glob patterns are now deprecated.
823 - [Functions with `'static` in their return types will now not be as usable as
824 if they were using lifetime parameters instead.][42417]
825 - [The reimplementation of `{f32, f64}::is_sign_{negative, positive}` now
826 takes the sign of NaN into account where previously didn't.][42430]
828 [42033]: https://github.com/rust-lang/rust/pull/42033
829 [42155]: https://github.com/rust-lang/rust/pull/42155
830 [42271]: https://github.com/rust-lang/rust/pull/42271
831 [42397]: https://github.com/rust-lang/rust/pull/42397
832 [42417]: https://github.com/rust-lang/rust/pull/42417
833 [42430]: https://github.com/rust-lang/rust/pull/42430
834 [42431]: https://github.com/rust-lang/rust/pull/42431
835 [42533]: https://github.com/rust-lang/rust/pull/42533
836 [42571]: https://github.com/rust-lang/rust/pull/42571
837 [42613]: https://github.com/rust-lang/rust/pull/42613
838 [42799]: https://github.com/rust-lang/rust/pull/42799
839 [42807]: https://github.com/rust-lang/rust/pull/42807
840 [42809]: https://github.com/rust-lang/rust/pull/42809
841 [42822]: https://github.com/rust-lang/rust/pull/42822
842 [42826]: https://github.com/rust-lang/rust/pull/42826
843 [42854]: https://github.com/rust-lang/rust/pull/42854
844 [42913]: https://github.com/rust-lang/rust/pull/42913
845 [42999]: https://github.com/rust-lang/rust/pull/42999
846 [43011]: https://github.com/rust-lang/rust/pull/43011
847 [43015]: https://github.com/rust-lang/rust/pull/43015
848 [43072]: https://github.com/rust-lang/rust/pull/43072
849 [43077]: https://github.com/rust-lang/rust/pull/43077
850 [43097]: https://github.com/rust-lang/rust/pull/43097
851 [43099]: https://github.com/rust-lang/rust/pull/43099
852 [43170]: https://github.com/rust-lang/rust/pull/43170
853 [43178]: https://github.com/rust-lang/rust/pull/43178
854 [43185]: https://github.com/rust-lang/rust/pull/43185
855 [43228]: https://github.com/rust-lang/rust/pull/43228
856 [cargo/3978]: https://github.com/rust-lang/cargo/pull/3978
857 [cargo/4214]: https://github.com/rust-lang/cargo/pull/4214
858 [cargo/4229]: https://github.com/rust-lang/cargo/pull/4229
859 [cargo/4248]: https://github.com/rust-lang/cargo/pull/4248
860 [cargo/4259]: https://github.com/rust-lang/cargo/pull/4259
861 [cargo/4270]: https://github.com/rust-lang/cargo/pull/4270
862 [`CStr::into_c_string`]: https://doc.rust-lang.org/std/ffi/struct.CStr.html#method.into_c_string
863 [`CString::as_c_str`]: https://doc.rust-lang.org/std/ffi/struct.CString.html#method.as_c_str
864 [`CString::into_boxed_c_str`]: https://doc.rust-lang.org/std/ffi/struct.CString.html#method.into_boxed_c_str
865 [`Chain::get_mut`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.get_mut
866 [`Chain::get_ref`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.get_ref
867 [`Chain::into_inner`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.into_inner
868 [`Option::get_or_insert_with`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.get_or_insert_with
869 [`Option::get_or_insert`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.get_or_insert
870 [`OsStr::into_os_string`]: https://doc.rust-lang.org/std/ffi/struct.OsStr.html#method.into_os_string
871 [`OsString::into_boxed_os_str`]: https://doc.rust-lang.org/std/ffi/struct.OsString.html#method.into_boxed_os_str
872 [`Take::get_mut`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.get_mut
873 [`Take::get_ref`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.get_ref
874 [`Utf8Error::error_len`]: https://doc.rust-lang.org/std/str/struct.Utf8Error.html#method.error_len
875 [`char::EscapeDebug`]: https://doc.rust-lang.org/std/char/struct.EscapeDebug.html
876 [`char::escape_debug`]: https://doc.rust-lang.org/std/primitive.char.html#method.escape_debug
877 [`compile_error!`]: https://doc.rust-lang.org/std/macro.compile_error.html
878 [`f32::from_bits`]: https://doc.rust-lang.org/std/primitive.f32.html#method.from_bits
879 [`f32::to_bits`]: https://doc.rust-lang.org/std/primitive.f32.html#method.to_bits
880 [`f64::from_bits`]: https://doc.rust-lang.org/std/primitive.f64.html#method.from_bits
881 [`f64::to_bits`]: https://doc.rust-lang.org/std/primitive.f64.html#method.to_bits
882 [`mem::ManuallyDrop`]: https://doc.rust-lang.org/std/mem/union.ManuallyDrop.html
883 [`slice::sort_unstable_by_key`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable_by_key
884 [`slice::sort_unstable_by`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable_by
885 [`slice::sort_unstable`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable
886 [`str::from_boxed_utf8_unchecked`]: https://doc.rust-lang.org/std/str/fn.from_boxed_utf8_unchecked.html
887 [`str::as_bytes_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.as_bytes_mut
888 [`str::from_utf8_mut`]: https://doc.rust-lang.org/std/str/fn.from_utf8_mut.html
889 [`str::from_utf8_unchecked_mut`]: https://doc.rust-lang.org/std/str/fn.from_utf8_unchecked_mut.html
890 [`str::get_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_mut
891 [`str::get_unchecked_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_unchecked_mut
892 [`str::get_unchecked`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_unchecked
893 [`str::get`]: https://doc.rust-lang.org/std/primitive.str.html#method.get
894 [`str::into_boxed_bytes`]: https://doc.rust-lang.org/std/primitive.str.html#method.into_boxed_bytes
897 Version 1.19.0 (2017-07-20)
898 ===========================
903 - [Numeric fields can now be used for creating tuple structs.][41145] [RFC 1506]
904 For example `struct Point(u32, u32); let x = Point { 0: 7, 1: 0 };`.
905 - [Macro recursion limit increased to 1024 from 64.][41676]
906 - [Added lint for detecting unused macros.][41907]
907 - [`loop` can now return a value with `break`.][42016] [RFC 1624]
908 For example: `let x = loop { break 7; };`
909 - [C compatible `union`s are now available.][42068] [RFC 1444] They can only
910 contain `Copy` types and cannot have a `Drop` implementation.
911 Example: `union Foo { bar: u8, baz: usize }`
912 - [Non capturing closures can now be coerced into `fn`s,][42162] [RFC 1558]
913 Example: `let foo: fn(u8) -> u8 = |v: u8| { v };`
918 - [Add support for bootstrapping the Rust compiler toolchain on Android.][41370]
919 - [Change `arm-linux-androideabi` to correspond to the `armeabi`
920 official ABI.][41656] If you wish to continue targeting the `armeabi-v7a` ABI
921 you should use `--target armv7-linux-androideabi`.
922 - [Fixed ICE when removing a source file between compilation sessions.][41873]
923 - [Minor optimisation of string operations.][42037]
924 - [Compiler error message is now `aborting due to previous error(s)` instead of
925 `aborting due to N previous errors`][42150] This was previously inaccurate and
926 would only count certain kinds of errors.
927 - [The compiler now supports Visual Studio 2017][42225]
928 - [The compiler is now built against LLVM 4.0.1 by default][42948]
929 - [Added a lot][42264] of [new error codes][42302]
930 - [Added `target-feature=+crt-static` option][37406] [RFC 1721] Which allows
931 libraries with C Run-time Libraries(CRT) to be statically linked.
932 - [Fixed various ARM codegen bugs][42740]
937 - [`String` now implements `FromIterator<Cow<'a, str>>` and
938 `Extend<Cow<'a, str>>`][41449]
939 - [`Vec` now implements `From<&mut [T]>`][41530]
940 - [`Box<[u8]>` now implements `From<Box<str>>`][41258]
941 - [`SplitWhitespace` now implements `Clone`][41659]
942 - [`[u8]::reverse` is now 5x faster and `[u16]::reverse` is now
944 - [`eprint!` and `eprintln!` macros added to prelude.][41192] Same as the `print!`
945 macros, but for printing to stderr.
950 - [`OsString::shrink_to_fit`]
953 - [`thread::ThreadId`]
958 - [Build scripts can now add environment variables to the environment
959 the crate is being compiled in.
960 Example: `println!("cargo:rustc-env=FOO=bar");`][cargo/3929]
961 - [Subcommands now replace the current process rather than spawning a new
962 child process][cargo/3970]
963 - [Workspace members can now accept glob file patterns][cargo/3979]
964 - [Added `--all` flag to the `cargo bench` subcommand to run benchmarks of all
965 the members in a given workspace.][cargo/3988]
966 - [Updated `libssh2-sys` to 0.2.6][cargo/4008]
967 - [Target directory path is now in the cargo metadata][cargo/4022]
968 - [Cargo no longer checks out a local working directory for the
969 crates.io index][cargo/4026] This should provide smaller file size for the
970 registry, and improve cloning times, especially on Windows machines.
971 - [Added an `--exclude` option for excluding certain packages when using the
972 `--all` option][cargo/4031]
973 - [Cargo will now automatically retry when receiving a 5xx error
974 from crates.io][cargo/4032]
975 - [The `--features` option now accepts multiple comma or space
976 delimited values.][cargo/4084]
977 - [Added support for custom target specific runners][cargo/3954]
982 - [Added `rust-windbg.cmd`][39983] for loading rust `.natvis` files in the
984 - [Rust will now release XZ compressed packages][rust-installer/57]
985 - [rustup will now prefer to download rust packages with
986 XZ compression][rustup/1100] over GZip packages.
987 - [Added the ability to escape `#` in rust documentation][41785] By adding
988 additional `#`'s ie. `##` is now `#`
993 - [`MutexGuard<T>` may only be `Sync` if `T` is `Sync`.][41624]
994 - [`-Z` flags are now no longer allowed to be used on the stable
995 compiler.][41751] This has been a warning for a year previous to this.
996 - [As a result of the `-Z` flag change, the `cargo-check` plugin no
997 longer works][42844]. Users should migrate to the built-in `check`
998 command, which has been available since 1.16.
999 - [Ending a float literal with `._` is now a hard error.
1000 Example: `42._` .][41946]
1001 - [Any use of a private `extern crate` outside of its module is now a
1002 hard error.][36886] This was previously a warning.
1003 - [`use ::self::foo;` is now a hard error.][36888] `self` paths are always
1004 relative while the `::` prefix makes a path absolute, but was ignored and the
1005 path was relative regardless.
1006 - [Floating point constants in match patterns is now a hard error][36890]
1007 This was previously a warning.
1008 - [Struct or enum constants that don't derive `PartialEq` & `Eq` used
1009 match patterns is now a hard error][36891] This was previously a warning.
1010 - [Lifetimes named `'_` are no longer allowed.][36892] This was previously
1012 - [From the pound escape, lines consisting of multiple `#`s are
1014 - [It is an error to re-export private enum variants][42460]. This is
1015 known to break a number of crates that depend on an older version of
1017 - [On Windows, if `VCINSTALLDIR` is set incorrectly, `rustc` will try
1018 to use it to find the linker, and the build will fail where it did
1019 not previously][42607]
1021 [36886]: https://github.com/rust-lang/rust/issues/36886
1022 [36888]: https://github.com/rust-lang/rust/issues/36888
1023 [36890]: https://github.com/rust-lang/rust/issues/36890
1024 [36891]: https://github.com/rust-lang/rust/issues/36891
1025 [36892]: https://github.com/rust-lang/rust/issues/36892
1026 [37406]: https://github.com/rust-lang/rust/issues/37406
1027 [39983]: https://github.com/rust-lang/rust/pull/39983
1028 [41145]: https://github.com/rust-lang/rust/pull/41145
1029 [41192]: https://github.com/rust-lang/rust/pull/41192
1030 [41258]: https://github.com/rust-lang/rust/pull/41258
1031 [41370]: https://github.com/rust-lang/rust/pull/41370
1032 [41449]: https://github.com/rust-lang/rust/pull/41449
1033 [41530]: https://github.com/rust-lang/rust/pull/41530
1034 [41624]: https://github.com/rust-lang/rust/pull/41624
1035 [41656]: https://github.com/rust-lang/rust/pull/41656
1036 [41659]: https://github.com/rust-lang/rust/pull/41659
1037 [41676]: https://github.com/rust-lang/rust/pull/41676
1038 [41751]: https://github.com/rust-lang/rust/pull/41751
1039 [41764]: https://github.com/rust-lang/rust/pull/41764
1040 [41785]: https://github.com/rust-lang/rust/pull/41785
1041 [41873]: https://github.com/rust-lang/rust/pull/41873
1042 [41907]: https://github.com/rust-lang/rust/pull/41907
1043 [41946]: https://github.com/rust-lang/rust/pull/41946
1044 [42016]: https://github.com/rust-lang/rust/pull/42016
1045 [42037]: https://github.com/rust-lang/rust/pull/42037
1046 [42068]: https://github.com/rust-lang/rust/pull/42068
1047 [42150]: https://github.com/rust-lang/rust/pull/42150
1048 [42162]: https://github.com/rust-lang/rust/pull/42162
1049 [42225]: https://github.com/rust-lang/rust/pull/42225
1050 [42264]: https://github.com/rust-lang/rust/pull/42264
1051 [42302]: https://github.com/rust-lang/rust/pull/42302
1052 [42460]: https://github.com/rust-lang/rust/issues/42460
1053 [42607]: https://github.com/rust-lang/rust/issues/42607
1054 [42740]: https://github.com/rust-lang/rust/pull/42740
1055 [42844]: https://github.com/rust-lang/rust/issues/42844
1056 [42948]: https://github.com/rust-lang/rust/pull/42948
1057 [RFC 1444]: https://github.com/rust-lang/rfcs/pull/1444
1058 [RFC 1506]: https://github.com/rust-lang/rfcs/pull/1506
1059 [RFC 1558]: https://github.com/rust-lang/rfcs/pull/1558
1060 [RFC 1624]: https://github.com/rust-lang/rfcs/pull/1624
1061 [RFC 1721]: https://github.com/rust-lang/rfcs/pull/1721
1062 [`Command::envs`]: https://doc.rust-lang.org/std/process/struct.Command.html#method.envs
1063 [`OsString::shrink_to_fit`]: https://doc.rust-lang.org/std/ffi/struct.OsString.html#method.shrink_to_fit
1064 [`cmp::Reverse`]: https://doc.rust-lang.org/std/cmp/struct.Reverse.html
1065 [`thread::ThreadId`]: https://doc.rust-lang.org/std/thread/struct.ThreadId.html
1066 [cargo/3929]: https://github.com/rust-lang/cargo/pull/3929
1067 [cargo/3954]: https://github.com/rust-lang/cargo/pull/3954
1068 [cargo/3970]: https://github.com/rust-lang/cargo/pull/3970
1069 [cargo/3979]: https://github.com/rust-lang/cargo/pull/3979
1070 [cargo/3988]: https://github.com/rust-lang/cargo/pull/3988
1071 [cargo/4008]: https://github.com/rust-lang/cargo/pull/4008
1072 [cargo/4022]: https://github.com/rust-lang/cargo/pull/4022
1073 [cargo/4026]: https://github.com/rust-lang/cargo/pull/4026
1074 [cargo/4031]: https://github.com/rust-lang/cargo/pull/4031
1075 [cargo/4032]: https://github.com/rust-lang/cargo/pull/4032
1076 [cargo/4084]: https://github.com/rust-lang/cargo/pull/4084
1077 [rust-installer/57]: https://github.com/rust-lang/rust-installer/pull/57
1078 [rustup/1100]: https://github.com/rust-lang-nursery/rustup.rs/pull/1100
1081 Version 1.18.0 (2017-06-08)
1082 ===========================
1087 - [Stabilize pub(restricted)][40556] `pub` can now accept a module path to
1088 make the item visible to just that module tree. Also accepts the keyword
1089 `crate` to make something public to the whole crate but not users of the
1090 library. Example: `pub(crate) mod utils;`. [RFC 1422].
1091 - [Stabilize `#![windows_subsystem]` attribute][40870] conservative exposure of the
1092 `/SUBSYSTEM` linker flag on Windows platforms. [RFC 1665].
1093 - [Refactor of trait object type parsing][40043] Now `ty` in macros can accept
1094 types like `Write + Send`, trailing `+` are now supported in trait objects,
1095 and better error reporting for trait objects starting with `?Sized`.
1096 - [0e+10 is now a valid floating point literal][40589]
1097 - [Now warns if you bind a lifetime parameter to 'static][40734]
1098 - [Tuples, Enum variant fields, and structs with no `repr` attribute or with
1099 `#[repr(Rust)]` are reordered to minimize padding and produce a smaller
1100 representation in some cases.][40377]
1105 - [rustc can now emit mir with `--emit mir`][39891]
1106 - [Improved LLVM IR for trivial functions][40367]
1107 - [Added explanation for E0090(Wrong number of lifetimes are supplied)][40723]
1108 - [rustc compilation is now 15%-20% faster][41469] Thanks to optimisation
1109 opportunities found through profiling
1110 - [Improved backtrace formatting when panicking][38165]
1115 - [Specialized `Vec::from_iter` being passed `vec::IntoIter`][40731] if the
1116 iterator hasn't been advanced the original `Vec` is reassembled with no actual
1117 iteration or reallocation.
1118 - [Simplified HashMap Bucket interface][40561] provides performance
1119 improvements for iterating and cloning.
1120 - [Specialize Vec::from_elem to use calloc][40409]
1121 - [Fixed Race condition in fs::create_dir_all][39799]
1122 - [No longer caching stdio on Windows][40516]
1123 - [Optimized insertion sort in slice][40807] insertion sort in some cases
1124 2.50%~ faster and in one case now 12.50% faster.
1125 - [Optimized `AtomicBool::fetch_nand`][41143]
1130 - [`Child::try_wait`]
1131 - [`HashMap::retain`]
1132 - [`HashSet::retain`]
1134 - [`TcpStream::peek`]
1135 - [`UdpSocket::peek`]
1136 - [`UdpSocket::peek_from`]
1141 - [Added partial Pijul support][cargo/3842] Pijul is a version control system in Rust.
1142 You can now create new cargo projects with Pijul using `cargo new --vcs pijul`
1143 - [Now always emits build script warnings for crates that fail to build][cargo/3847]
1144 - [Added Android build support][cargo/3885]
1145 - [Added `--bins` and `--tests` flags][cargo/3901] now you can build all programs
1146 of a certain type, for example `cargo build --bins` will build all
1148 - [Added support for haiku][cargo/3952]
1153 - [rustdoc can now use pulldown-cmark with the `--enable-commonmark` flag][40338]
1154 - [Added rust-windbg script for better debugging on Windows][39983]
1155 - [Rust now uses the official cross compiler for NetBSD][40612]
1156 - [rustdoc now accepts `#` at the start of files][40828]
1157 - [Fixed jemalloc support for musl][41168]
1162 - [Changes to how the `0` flag works in format!][40241] Padding zeroes are now
1163 always placed after the sign if it exists and before the digits. With the `#`
1164 flag the zeroes are placed after the prefix and before the digits.
1165 - [Due to the struct field optimisation][40377], using `transmute` on structs
1166 that have no `repr` attribute or `#[repr(Rust)]` will no longer work. This has
1167 always been undefined behavior, but is now more likely to break in practice.
1168 - [The refactor of trait object type parsing][40043] fixed a bug where `+` was
1169 receiving the wrong priority parsing things like `&for<'a> Tr<'a> + Send` as
1170 `&(for<'a> Tr<'a> + Send)` instead of `(&for<'a> Tr<'a>) + Send`
1171 - [Overlapping inherent `impl`s are now a hard error][40728]
1172 - [`PartialOrd` and `Ord` must agree on the ordering.][41270]
1173 - [`rustc main.rs -o out --emit=asm,llvm-ir`][41085] Now will output
1174 `out.asm` and `out.ll` instead of only one of the filetypes.
1175 - [ calling a function that returns `Self` will no longer work][41805] when
1176 the size of `Self` cannot be statically determined.
1177 - [rustc now builds with a "pthreads" flavour of MinGW for Windows GNU][40805]
1178 this has caused a few regressions namely:
1180 - Changed the link order of local static/dynamic libraries (respecting the
1181 order on given rather than having the compiler reorder).
1182 - Changed how MinGW is linked, native code linked to dynamic libraries
1183 may require manually linking to the gcc support library (for the native
1186 [38165]: https://github.com/rust-lang/rust/pull/38165
1187 [39799]: https://github.com/rust-lang/rust/pull/39799
1188 [39891]: https://github.com/rust-lang/rust/pull/39891
1189 [39983]: https://github.com/rust-lang/rust/pull/39983
1190 [40043]: https://github.com/rust-lang/rust/pull/40043
1191 [40241]: https://github.com/rust-lang/rust/pull/40241
1192 [40338]: https://github.com/rust-lang/rust/pull/40338
1193 [40367]: https://github.com/rust-lang/rust/pull/40367
1194 [40377]: https://github.com/rust-lang/rust/pull/40377
1195 [40409]: https://github.com/rust-lang/rust/pull/40409
1196 [40516]: https://github.com/rust-lang/rust/pull/40516
1197 [40556]: https://github.com/rust-lang/rust/pull/40556
1198 [40561]: https://github.com/rust-lang/rust/pull/40561
1199 [40589]: https://github.com/rust-lang/rust/pull/40589
1200 [40612]: https://github.com/rust-lang/rust/pull/40612
1201 [40723]: https://github.com/rust-lang/rust/pull/40723
1202 [40728]: https://github.com/rust-lang/rust/pull/40728
1203 [40731]: https://github.com/rust-lang/rust/pull/40731
1204 [40734]: https://github.com/rust-lang/rust/pull/40734
1205 [40805]: https://github.com/rust-lang/rust/pull/40805
1206 [40807]: https://github.com/rust-lang/rust/pull/40807
1207 [40828]: https://github.com/rust-lang/rust/pull/40828
1208 [40870]: https://github.com/rust-lang/rust/pull/40870
1209 [41085]: https://github.com/rust-lang/rust/pull/41085
1210 [41143]: https://github.com/rust-lang/rust/pull/41143
1211 [41168]: https://github.com/rust-lang/rust/pull/41168
1212 [41270]: https://github.com/rust-lang/rust/issues/41270
1213 [41469]: https://github.com/rust-lang/rust/pull/41469
1214 [41805]: https://github.com/rust-lang/rust/issues/41805
1215 [RFC 1422]: https://github.com/rust-lang/rfcs/blob/master/text/1422-pub-restricted.md
1216 [RFC 1665]: https://github.com/rust-lang/rfcs/blob/master/text/1665-windows-subsystem.md
1217 [`Child::try_wait`]: https://doc.rust-lang.org/std/process/struct.Child.html#method.try_wait
1218 [`HashMap::retain`]: https://doc.rust-lang.org/std/collections/struct.HashMap.html#method.retain
1219 [`HashSet::retain`]: https://doc.rust-lang.org/std/collections/struct.HashSet.html#method.retain
1220 [`PeekMut::pop`]: https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html#method.pop
1221 [`TcpStream::peek`]: https://doc.rust-lang.org/std/net/struct.TcpStream.html#method.peek
1222 [`UdpSocket::peek_from`]: https://doc.rust-lang.org/std/net/struct.UdpSocket.html#method.peek_from
1223 [`UdpSocket::peek`]: https://doc.rust-lang.org/std/net/struct.UdpSocket.html#method.peek
1224 [cargo/3842]: https://github.com/rust-lang/cargo/pull/3842
1225 [cargo/3847]: https://github.com/rust-lang/cargo/pull/3847
1226 [cargo/3885]: https://github.com/rust-lang/cargo/pull/3885
1227 [cargo/3901]: https://github.com/rust-lang/cargo/pull/3901
1228 [cargo/3952]: https://github.com/rust-lang/cargo/pull/3952
1231 Version 1.17.0 (2017-04-27)
1232 ===========================
1237 * [The lifetime of statics and consts defaults to `'static`][39265]. [RFC 1623]
1238 * [Fields of structs may be initialized without duplicating the field/variable
1239 names][39761]. [RFC 1682]
1240 * [`Self` may be included in the `where` clause of `impls`][38864]. [RFC 1647]
1241 * [When coercing to an unsized type lifetimes must be equal][40319]. That is,
1242 there is no subtyping between `T` and `U` when `T: Unsize<U>`. For example,
1243 coercing `&mut [&'a X; N]` to `&mut [&'b X]` requires `'a` be equal to
1244 `'b`. Soundness fix.
1245 * [Values passed to the indexing operator, `[]`, automatically coerce][40166]
1246 * [Static variables may contain references to other statics][40027]
1251 * [Exit quickly on only `--emit dep-info`][40336]
1252 * [Make `-C relocation-model` more correctly determine whether the linker
1253 creates a position-independent executable][40245]
1254 * [Add `-C overflow-checks` to directly control whether integer overflow
1256 * [The rustc type checker now checks items on demand instead of in a single
1257 in-order pass][40008]. This is mostly an internal refactoring in support of
1258 future work, including incremental type checking, but also resolves [RFC
1259 1647], allowing `Self` to appear in `impl` `where` clauses.
1260 * [Optimize vtable loads][39995]
1261 * [Turn off vectorization for Emscripten targets][39990]
1262 * [Provide suggestions for unknown macros imported with `use`][39953]
1263 * [Fix ICEs in path resolution][39939]
1264 * [Strip exception handling code on Emscripten when `panic=abort`][39193]
1265 * [Add clearer error message using `&str + &str`][39116]
1276 * [`Ordering::then`]
1277 * [`Ordering::then_with`]
1278 * [`BTreeMap::range`]
1279 * [`BTreeMap::range_mut`]
1280 * [`collections::Bound`]
1281 * [`process::abort`]
1282 * [`ptr::read_unaligned`]
1283 * [`ptr::write_unaligned`]
1284 * [`Result::expect_err`]
1287 * [`Cell::into_inner`]
1293 * [`BTreeMap` and `BTreeSet` can iterate over ranges][27787]
1294 * [`Cell` can store non-`Copy` types][39793]. [RFC 1651]
1295 * [`String` implements `FromIterator<&char>`][40028]
1296 * `Box` [implements][40009] a number of new conversions:
1297 `From<Box<str>> for String`,
1298 `From<Box<[T]>> for Vec<T>`,
1299 `From<Box<CStr>> for CString`,
1300 `From<Box<OsStr>> for OsString`,
1301 `From<Box<Path>> for PathBuf`,
1302 `Into<Box<str>> for String`,
1303 `Into<Box<[T]>> for Vec<T>`,
1304 `Into<Box<CStr>> for CString`,
1305 `Into<Box<OsStr>> for OsString`,
1306 `Into<Box<Path>> for PathBuf`,
1307 `Default for Box<str>`,
1308 `Default for Box<CStr>`,
1309 `Default for Box<OsStr>`,
1310 `From<&CStr> for Box<CStr>`,
1311 `From<&OsStr> for Box<OsStr>`,
1312 `From<&Path> for Box<Path>`
1313 * [`ffi::FromBytesWithNulError` implements `Error` and `Display`][39960]
1314 * [Specialize `PartialOrd<A> for [A] where A: Ord`][39642]
1315 * [Slightly optimize `slice::sort`][39538]
1316 * [Add `ToString` trait specialization for `Cow<'a, str>` and `String`][39440]
1317 * [`Box<[T]>` implements `From<&[T]> where T: Copy`,
1318 `Box<str>` implements `From<&str>`][39438]
1319 * [`IpAddr` implements `From` for various arrays. `SocketAddr` implements
1320 `From<(I, u16)> where I: Into<IpAddr>`][39372]
1321 * [`format!` estimates the needed capacity before writing a string][39356]
1322 * [Support unprivileged symlink creation in Windows][38921]
1323 * [`PathBuf` implements `Default`][38764]
1324 * [Implement `PartialEq<[A]>` for `VecDeque<A>`][38661]
1325 * [`HashMap` resizes adaptively][38368] to guard against DOS attacks
1326 and poor hash functions.
1331 * [Add `cargo check --all`][cargo/3731]
1332 * [Add an option to ignore SSL revocation checking][cargo/3699]
1333 * [Add `cargo run --package`][cargo/3691]
1334 * [Add `required_features`][cargo/3667]
1335 * [Assume `build.rs` is a build script][cargo/3664]
1336 * [Find workspace via `workspace_root` link in containing member][cargo/3562]
1341 * [Documentation is rendered with mdbook instead of the obsolete, in-tree
1343 * [The "Unstable Book" documents nightly-only features][ubook]
1344 * [Improve the style of the sidebar in rustdoc output][40265]
1345 * [Configure build correctly on 64-bit CPU's with the armhf ABI][40261]
1346 * [Fix MSP430 breakage due to `i128`][40257]
1347 * [Preliminary Solaris/SPARCv9 support][39903]
1348 * [`rustc` is linked statically on Windows MSVC targets][39837], allowing it to
1349 run without installing the MSVC runtime.
1350 * [`rustdoc --test` includes file names in test names][39788]
1351 * This release includes builds of `std` for `sparc64-unknown-linux-gnu`,
1352 `aarch64-unknown-linux-fuchsia`, and `x86_64-unknown-linux-fuchsia`.
1353 * [Initial support for `aarch64-unknown-freebsd`][39491]
1354 * [Initial support for `i686-unknown-netbsd`][39426]
1355 * [This release no longer includes the old makefile build system][39431]. Rust
1356 is built with a custom build system, written in Rust, and with Cargo.
1357 * [Add Debug implementations for libcollection structs][39002]
1358 * [`TypeId` implements `PartialOrd` and `Ord`][38981]
1359 * [`--test-threads=0` produces an error][38945]
1360 * [`rustup` installs documentation by default][40526]
1361 * [The Rust source includes NatVis visualizations][39843]. These can be used by
1362 WinDbg and Visual Studio to improve the debugging experience.
1367 * [Rust 1.17 does not correctly detect the MSVC 2017 linker][38584]. As a
1368 workaround, either use MSVC 2015 or run vcvars.bat.
1369 * [When coercing to an unsized type lifetimes must be equal][40319]. That is,
1370 disallow subtyping between `T` and `U` when `T: Unsize<U>`, e.g. coercing
1371 `&mut [&'a X; N]` to `&mut [&'b X]` requires `'a` be equal to `'b`. Soundness
1373 * [`format!` and `Display::to_string` panic if an underlying formatting
1374 implementation returns an error][40117]. Previously the error was silently
1375 ignored. It is incorrect for `write_fmt` to return an error when writing
1377 * [In-tree crates are verified to be unstable][39851]. Previously, some minor
1378 crates were marked stable and could be accessed from the stable toolchain.
1379 * [Rust git source no longer includes vendored crates][39728]. Those that need
1380 to build with vendored crates should build from release tarballs.
1381 * [Fix inert attributes from `proc_macro_derives`][39572]
1382 * [During crate resolution, rustc prefers a crate in the sysroot if two crates
1383 are otherwise identical][39518]. Unlikely to be encountered outside the Rust
1385 * [Fixed bugs around how type inference interacts with dead-code][39485]. The
1386 existing code generally ignores the type of dead-code unless a type-hint is
1387 provided; this can cause surprising inference interactions particularly around
1388 defaulting. The new code uniformly ignores the result type of dead-code.
1389 * [Tuple-struct constructors with private fields are no longer visible][38932]
1390 * [Lifetime parameters that do not appear in the arguments are now considered
1391 early-bound][38897], resolving a soundness bug (#[32330]). The
1392 `hr_lifetime_in_assoc_type` future-compatibility lint has been in effect since
1394 * [rustdoc: fix doctests with non-feature crate attributes][38161]
1395 * [Make transmuting from fn item types to pointer-sized types a hard
1398 [27787]: https://github.com/rust-lang/rust/issues/27787
1399 [32330]: https://github.com/rust-lang/rust/issues/32330
1400 [34198]: https://github.com/rust-lang/rust/pull/34198
1401 [38161]: https://github.com/rust-lang/rust/pull/38161
1402 [38368]: https://github.com/rust-lang/rust/pull/38368
1403 [38584]: https://github.com/rust-lang/rust/issues/38584
1404 [38661]: https://github.com/rust-lang/rust/pull/38661
1405 [38764]: https://github.com/rust-lang/rust/pull/38764
1406 [38864]: https://github.com/rust-lang/rust/issues/38864
1407 [38897]: https://github.com/rust-lang/rust/pull/38897
1408 [38921]: https://github.com/rust-lang/rust/pull/38921
1409 [38932]: https://github.com/rust-lang/rust/pull/38932
1410 [38945]: https://github.com/rust-lang/rust/pull/38945
1411 [38981]: https://github.com/rust-lang/rust/pull/38981
1412 [39002]: https://github.com/rust-lang/rust/pull/39002
1413 [39116]: https://github.com/rust-lang/rust/pull/39116
1414 [39193]: https://github.com/rust-lang/rust/pull/39193
1415 [39265]: https://github.com/rust-lang/rust/pull/39265
1416 [39356]: https://github.com/rust-lang/rust/pull/39356
1417 [39372]: https://github.com/rust-lang/rust/pull/39372
1418 [39426]: https://github.com/rust-lang/rust/pull/39426
1419 [39431]: https://github.com/rust-lang/rust/pull/39431
1420 [39438]: https://github.com/rust-lang/rust/pull/39438
1421 [39440]: https://github.com/rust-lang/rust/pull/39440
1422 [39485]: https://github.com/rust-lang/rust/pull/39485
1423 [39491]: https://github.com/rust-lang/rust/pull/39491
1424 [39518]: https://github.com/rust-lang/rust/pull/39518
1425 [39538]: https://github.com/rust-lang/rust/pull/39538
1426 [39572]: https://github.com/rust-lang/rust/pull/39572
1427 [39633]: https://github.com/rust-lang/rust/pull/39633
1428 [39642]: https://github.com/rust-lang/rust/pull/39642
1429 [39728]: https://github.com/rust-lang/rust/pull/39728
1430 [39761]: https://github.com/rust-lang/rust/pull/39761
1431 [39788]: https://github.com/rust-lang/rust/pull/39788
1432 [39793]: https://github.com/rust-lang/rust/pull/39793
1433 [39837]: https://github.com/rust-lang/rust/pull/39837
1434 [39843]: https://github.com/rust-lang/rust/pull/39843
1435 [39851]: https://github.com/rust-lang/rust/pull/39851
1436 [39903]: https://github.com/rust-lang/rust/pull/39903
1437 [39939]: https://github.com/rust-lang/rust/pull/39939
1438 [39953]: https://github.com/rust-lang/rust/pull/39953
1439 [39960]: https://github.com/rust-lang/rust/pull/39960
1440 [39990]: https://github.com/rust-lang/rust/pull/39990
1441 [39995]: https://github.com/rust-lang/rust/pull/39995
1442 [40008]: https://github.com/rust-lang/rust/pull/40008
1443 [40009]: https://github.com/rust-lang/rust/pull/40009
1444 [40027]: https://github.com/rust-lang/rust/pull/40027
1445 [40028]: https://github.com/rust-lang/rust/pull/40028
1446 [40037]: https://github.com/rust-lang/rust/pull/40037
1447 [40117]: https://github.com/rust-lang/rust/pull/40117
1448 [40166]: https://github.com/rust-lang/rust/pull/40166
1449 [40245]: https://github.com/rust-lang/rust/pull/40245
1450 [40257]: https://github.com/rust-lang/rust/pull/40257
1451 [40261]: https://github.com/rust-lang/rust/pull/40261
1452 [40265]: https://github.com/rust-lang/rust/pull/40265
1453 [40319]: https://github.com/rust-lang/rust/pull/40319
1454 [40336]: https://github.com/rust-lang/rust/pull/40336
1455 [40526]: https://github.com/rust-lang/rust/pull/40526
1456 [RFC 1623]: https://github.com/rust-lang/rfcs/blob/master/text/1623-static.md
1457 [RFC 1647]: https://github.com/rust-lang/rfcs/blob/master/text/1647-allow-self-in-where-clauses.md
1458 [RFC 1651]: https://github.com/rust-lang/rfcs/blob/master/text/1651-movecell.md
1459 [RFC 1682]: https://github.com/rust-lang/rfcs/blob/master/text/1682-field-init-shorthand.md
1460 [`Arc::from_raw`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.from_raw
1461 [`Arc::into_raw`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.into_raw
1462 [`Arc::ptr_eq`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.ptr_eq
1463 [`BTreeMap::range_mut`]: https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.range_mut
1464 [`BTreeMap::range`]: https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.range
1465 [`Cell::into_inner`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.into_inner
1466 [`Cell::replace`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.replace
1467 [`Cell::swap`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.swap
1468 [`Cell::take`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.take
1469 [`Ordering::then_with`]: https://doc.rust-lang.org/std/cmp/enum.Ordering.html#method.then_with
1470 [`Ordering::then`]: https://doc.rust-lang.org/std/cmp/enum.Ordering.html#method.then
1471 [`Rc::from_raw`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.from_raw
1472 [`Rc::into_raw`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.into_raw
1473 [`Rc::ptr_eq`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.ptr_eq
1474 [`Result::expect_err`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.expect_err
1475 [`collections::Bound`]: https://doc.rust-lang.org/std/collections/enum.Bound.html
1476 [`process::abort`]: https://doc.rust-lang.org/std/process/fn.abort.html
1477 [`ptr::read_unaligned`]: https://doc.rust-lang.org/std/ptr/fn.read_unaligned.html
1478 [`ptr::write_unaligned`]: https://doc.rust-lang.org/std/ptr/fn.write_unaligned.html
1479 [cargo/3562]: https://github.com/rust-lang/cargo/pull/3562
1480 [cargo/3664]: https://github.com/rust-lang/cargo/pull/3664
1481 [cargo/3667]: https://github.com/rust-lang/cargo/pull/3667
1482 [cargo/3691]: https://github.com/rust-lang/cargo/pull/3691
1483 [cargo/3699]: https://github.com/rust-lang/cargo/pull/3699
1484 [cargo/3731]: https://github.com/rust-lang/cargo/pull/3731
1485 [mdbook]: https://crates.io/crates/mdbook
1486 [ubook]: https://doc.rust-lang.org/unstable-book/
1489 Version 1.16.0 (2017-03-16)
1490 ===========================
1495 * [The compiler's `dead_code` lint now accounts for type aliases][38051].
1496 * [Uninhabitable enums (those without any variants) no longer permit wildcard
1497 match patterns][38069]
1498 * [Clean up semantics of `self` in an import list][38313]
1499 * [`Self` may appear in `impl` headers][38920]
1500 * [`Self` may appear in struct expressions][39282]
1505 * [`rustc` now supports `--emit=metadata`, which causes rustc to emit
1506 a `.rmeta` file containing only crate metadata][38571]. This can be
1507 used by tools like the Rust Language Service to perform
1508 metadata-only builds.
1509 * [Levenshtein based typo suggestions now work in most places, while
1510 previously they worked only for fields and sometimes for local
1511 variables][38927]. Together with the overhaul of "no
1512 resolution"/"unexpected resolution" errors (#[38154]) they result in
1513 large and systematic improvement in resolution diagnostics.
1514 * [Fix `transmute::<T, U>` where `T` requires a bigger alignment than
1516 * [rustc: use -Xlinker when specifying an rpath with ',' in it][38798]
1517 * [`rustc` no longer attempts to provide "consider using an explicit
1518 lifetime" suggestions][37057]. They were inaccurate.
1523 * [`VecDeque::truncate`]
1524 * [`VecDeque::resize`]
1525 * [`String::insert_str`]
1526 * [`Duration::checked_add`]
1527 * [`Duration::checked_sub`]
1528 * [`Duration::checked_div`]
1529 * [`Duration::checked_mul`]
1532 * [`SocketAddr::is_ipv4`]
1533 * [`SocketAddr::is_ipv6`]
1534 * [`IpAddr::is_ipv4`]
1535 * [`IpAddr::is_ipv6`]
1537 * [`Vec::dedup_by_key`]
1538 * [`Result::unwrap_or_default`]
1539 * [`<*const T>::wrapping_offset`]
1540 * [`<*mut T>::wrapping_offset`]
1541 * `CommandExt::creation_flags`
1542 * [`File::set_permissions`]
1543 * [`String::split_off`]
1548 * [`[T]::binary_search` and `[T]::binary_search_by_key` now take
1549 their argument by `Borrow` parameter][37761]
1550 * [All public types in std implement `Debug`][38006]
1551 * [`IpAddr` implements `From<Ipv4Addr>` and `From<Ipv6Addr>`][38327]
1552 * [`Ipv6Addr` implements `From<[u16; 8]>`][38131]
1553 * [Ctrl-Z returns from `Stdin.read()` when reading from the console on
1555 * [std: Fix partial writes in `LineWriter`][38062]
1556 * [std: Clamp max read/write sizes on Unix][38062]
1557 * [Use more specific panic message for `&str` slicing errors][38066]
1558 * [`TcpListener::set_only_v6` is deprecated][38304]. This
1559 functionality cannot be achieved in std currently.
1560 * [`writeln!`, like `println!`, now accepts a form with no string
1561 or formatting arguments, to just print a newline][38469]
1562 * [Implement `iter::Sum` and `iter::Product` for `Result`][38580]
1563 * [Reduce the size of static data in `std_unicode::tables`][38781]
1564 * [`char::EscapeDebug`, `EscapeDefault`, `EscapeUnicode`,
1565 `CaseMappingIter`, `ToLowercase`, `ToUppercase`, implement
1567 * [`Duration` implements `Sum`][38712]
1568 * [`String` implements `ToSocketAddrs`][39048]
1573 * [The `cargo check` command does a type check of a project without
1574 building it][cargo/3296]
1575 * [crates.io will display CI badges from Travis and AppVeyor, if
1576 specified in Cargo.toml][cargo/3546]
1577 * [crates.io will display categories listed in Cargo.toml][cargo/3301]
1578 * [Compilation profiles accept integer values for `debug`, in addition
1579 to `true` and `false`. These are passed to `rustc` as the value to
1580 `-C debuginfo`][cargo/3534]
1581 * [Implement `cargo --version --verbose`][cargo/3604]
1582 * [All builds now output 'dep-info' build dependencies compatible with
1583 make and ninja][cargo/3557]
1584 * [Build all workspace members with `build --all`][cargo/3511]
1585 * [Document all workspace members with `doc --all`][cargo/3515]
1586 * [Path deps outside workspace are not members][cargo/3443]
1591 * [`rustdoc` has a `--sysroot` argument that, like `rustc`, specifies
1592 the path to the Rust implementation][38589]
1593 * [The `armv7-linux-androideabi` target no longer enables NEON
1594 extensions, per Google's ABI guide][38413]
1595 * [The stock standard library can be compiled for Redox OS][38401]
1596 * [Rust has initial SPARC support][38726]. Tier 3. No builds
1598 * [Rust has experimental support for Nvidia PTX][38559]. Tier 3. No
1600 * [Fix backtraces on i686-pc-windows-gnu by disabling FPO][39379]
1605 * [Uninhabitable enums (those without any variants) no longer permit wildcard
1606 match patterns][38069]
1607 * In this release, references to uninhabited types can not be
1608 pattern-matched. This was accidentally allowed in 1.15.
1609 * [The compiler's `dead_code` lint now accounts for type aliases][38051].
1610 * [Ctrl-Z returns from `Stdin.read()` when reading from the console on
1612 * [Clean up semantics of `self` in an import list][38313]
1613 * Reimplemented lifetime elision. This change was almost entirely compatible
1614 with existing code, but it did close a number of small bugs and loopholes,
1615 as well as being more accepting in some other [cases][41105].
1617 [37057]: https://github.com/rust-lang/rust/pull/37057
1618 [37761]: https://github.com/rust-lang/rust/pull/37761
1619 [38006]: https://github.com/rust-lang/rust/pull/38006
1620 [38051]: https://github.com/rust-lang/rust/pull/38051
1621 [38062]: https://github.com/rust-lang/rust/pull/38062
1622 [38062]: https://github.com/rust-lang/rust/pull/38622
1623 [38066]: https://github.com/rust-lang/rust/pull/38066
1624 [38069]: https://github.com/rust-lang/rust/pull/38069
1625 [38131]: https://github.com/rust-lang/rust/pull/38131
1626 [38154]: https://github.com/rust-lang/rust/pull/38154
1627 [38274]: https://github.com/rust-lang/rust/pull/38274
1628 [38304]: https://github.com/rust-lang/rust/pull/38304
1629 [38313]: https://github.com/rust-lang/rust/pull/38313
1630 [38314]: https://github.com/rust-lang/rust/pull/38314
1631 [38327]: https://github.com/rust-lang/rust/pull/38327
1632 [38401]: https://github.com/rust-lang/rust/pull/38401
1633 [38413]: https://github.com/rust-lang/rust/pull/38413
1634 [38469]: https://github.com/rust-lang/rust/pull/38469
1635 [38559]: https://github.com/rust-lang/rust/pull/38559
1636 [38571]: https://github.com/rust-lang/rust/pull/38571
1637 [38580]: https://github.com/rust-lang/rust/pull/38580
1638 [38589]: https://github.com/rust-lang/rust/pull/38589
1639 [38670]: https://github.com/rust-lang/rust/pull/38670
1640 [38712]: https://github.com/rust-lang/rust/pull/38712
1641 [38726]: https://github.com/rust-lang/rust/pull/38726
1642 [38781]: https://github.com/rust-lang/rust/pull/38781
1643 [38798]: https://github.com/rust-lang/rust/pull/38798
1644 [38909]: https://github.com/rust-lang/rust/pull/38909
1645 [38920]: https://github.com/rust-lang/rust/pull/38920
1646 [38927]: https://github.com/rust-lang/rust/pull/38927
1647 [39048]: https://github.com/rust-lang/rust/pull/39048
1648 [39282]: https://github.com/rust-lang/rust/pull/39282
1649 [39379]: https://github.com/rust-lang/rust/pull/39379
1650 [41105]: https://github.com/rust-lang/rust/issues/41105
1651 [`<*const T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset
1652 [`<*mut T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset
1653 [`Duration::checked_add`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_add
1654 [`Duration::checked_div`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_div
1655 [`Duration::checked_mul`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_mul
1656 [`Duration::checked_sub`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_sub
1657 [`File::set_permissions`]: https://doc.rust-lang.org/std/fs/struct.File.html#method.set_permissions
1658 [`IpAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv4
1659 [`IpAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv6
1660 [`Result::unwrap_or_default`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.unwrap_or_default
1661 [`SocketAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv4
1662 [`SocketAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv6
1663 [`String::insert_str`]: https://doc.rust-lang.org/std/string/struct.String.html#method.insert_str
1664 [`String::split_off`]: https://doc.rust-lang.org/std/string/struct.String.html#method.split_off
1665 [`Vec::dedup_by_key`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by_key
1666 [`Vec::dedup_by`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by
1667 [`VecDeque::resize`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.resize
1668 [`VecDeque::truncate`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.truncate
1669 [`str::repeat`]: https://doc.rust-lang.org/std/primitive.str.html#method.repeat
1670 [`str::replacen`]: https://doc.rust-lang.org/std/primitive.str.html#method.replacen
1671 [cargo/3296]: https://github.com/rust-lang/cargo/pull/3296
1672 [cargo/3301]: https://github.com/rust-lang/cargo/pull/3301
1673 [cargo/3443]: https://github.com/rust-lang/cargo/pull/3443
1674 [cargo/3511]: https://github.com/rust-lang/cargo/pull/3511
1675 [cargo/3515]: https://github.com/rust-lang/cargo/pull/3515
1676 [cargo/3534]: https://github.com/rust-lang/cargo/pull/3534
1677 [cargo/3546]: https://github.com/rust-lang/cargo/pull/3546
1678 [cargo/3557]: https://github.com/rust-lang/cargo/pull/3557
1679 [cargo/3604]: https://github.com/rust-lang/cargo/pull/3604
1680 [RFC 1623]: https://github.com/rust-lang/rfcs/blob/master/text/1623-static.md
1683 Version 1.15.1 (2017-02-09)
1684 ===========================
1686 * [Fix IntoIter::as_mut_slice's signature][39466]
1687 * [Compile compiler builtins with `-fPIC` on 32-bit platforms][39523]
1689 [39466]: https://github.com/rust-lang/rust/pull/39466
1690 [39523]: https://github.com/rust-lang/rust/pull/39523
1693 Version 1.15.0 (2017-02-02)
1694 ===========================
1699 * Basic procedural macros allowing custom `#[derive]`, aka "macros 1.1", are
1700 stable. This allows popular code-generating crates like Serde and Diesel to
1701 work ergonomically. [RFC 1681].
1702 * [Tuple structs may be empty. Unary and empty tuple structs may be instantiated
1703 with curly braces][36868]. Part of [RFC 1506].
1704 * [A number of minor changes to name resolution have been activated][37127].
1705 They add up to more consistent semantics, allowing for future evolution of
1706 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
1707 details of what is different. The breaking changes here have been transitioned
1708 through the [`legacy_imports`] lint since 1.14, with no known regressions.
1709 * [In `macro_rules`, `path` fragments can now be parsed as type parameter
1711 * [`?Sized` can be used in `where` clauses][37791]
1712 * [There is now a limit on the size of monomorphized types and it can be
1713 modified with the `#![type_size_limit]` crate attribute, similarly to
1714 the `#![recursion_limit]` attribute][37789]
1719 * [On Windows, the compiler will apply dllimport attributes when linking to
1720 extern functions][37973]. Additional attributes and flags can control which
1721 library kind is linked and its name. [RFC 1717].
1722 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
1723 * [The `--test` flag works with procedural macro crates][38107]
1724 * [Fix `extern "aapcs" fn` ABI][37814]
1725 * [The `-C no-stack-check` flag is deprecated][37636]. It does nothing.
1726 * [The `format!` expander recognizes incorrect `printf` and shell-style
1727 formatting directives and suggests the correct format][37613].
1728 * [Only report one error for all unused imports in an import list][37456]
1730 Compiler Performance
1731 --------------------
1733 * [Avoid unnecessary `mk_ty` calls in `Ty::super_fold_with`][37705]
1734 * [Avoid more unnecessary `mk_ty` calls in `Ty::super_fold_with`][37979]
1735 * [Don't clone in `UnificationTable::probe`][37848]
1736 * [Remove `scope_auxiliary` to cut RSS by 10%][37764]
1737 * [Use small vectors in type walker][37760]
1738 * [Macro expansion performance was improved][37701]
1739 * [Change `HirVec<P<T>>` to `HirVec<T>` in `hir::Expr`][37642]
1740 * [Replace FNV with a faster hash function][37229]
1745 * [`std::iter::Iterator::min_by`]
1746 * [`std::iter::Iterator::max_by`]
1747 * [`std::os::*::fs::FileExt`]
1748 * [`std::sync::atomic::Atomic*::get_mut`]
1749 * [`std::sync::atomic::Atomic*::into_inner`]
1750 * [`std::vec::IntoIter::as_slice`]
1751 * [`std::vec::IntoIter::as_mut_slice`]
1752 * [`std::sync::mpsc::Receiver::try_iter`]
1753 * [`std::os::unix::process::CommandExt::before_exec`]
1754 * [`std::rc::Rc::strong_count`]
1755 * [`std::rc::Rc::weak_count`]
1756 * [`std::sync::Arc::strong_count`]
1757 * [`std::sync::Arc::weak_count`]
1758 * [`std::char::encode_utf8`]
1759 * [`std::char::encode_utf16`]
1760 * [`std::cell::Ref::clone`]
1761 * [`std::io::Take::into_inner`]
1766 * [The standard sorting algorithm has been rewritten for dramatic performance
1767 improvements][38192]. It is a hybrid merge sort, drawing influences from
1768 Timsort. Previously it was a naive merge sort.
1769 * [`Iterator::nth` no longer has a `Sized` bound][38134]
1770 * [`Extend<&T>` is specialized for `Vec` where `T: Copy`][38182] to improve
1772 * [`chars().count()` is much faster][37888] and so are [`chars().last()`
1773 and `char_indices().last()`][37882]
1774 * [Fix ARM Objective-C ABI in `std::env::args`][38146]
1775 * [Chinese characters display correctly in `fmt::Debug`][37855]
1776 * [Derive `Default` for `Duration`][37699]
1777 * [Support creation of anonymous pipes on WinXP/2k][37677]
1778 * [`mpsc::RecvTimeoutError` implements `Error`][37527]
1779 * [Don't pass overlapped handles to processes][38835]
1784 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
1785 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
1786 should instead check the variable at runtime with `std::env`. That the value
1787 was set at build time was a bug, and incorrect when cross-compiling. This
1788 change is known to cause breakage.
1789 * [Add `--all` flag to `cargo test`][cargo/3221]
1790 * [Compile statically against the MSVC CRT][cargo/3363]
1791 * [Mix feature flags into fingerprint/metadata shorthash][cargo/3102]
1792 * [Link OpenSSL statically on OSX][cargo/3311]
1793 * [Apply new fingerprinting to build dir outputs][cargo/3310]
1794 * [Test for bad path overrides with summaries][cargo/3336]
1795 * [Require `cargo install --vers` to take a semver version][cargo/3338]
1796 * [Fix retrying crate downloads for network errors][cargo/3348]
1797 * [Implement string lookup for `build.rustflags` config key][cargo/3356]
1798 * [Emit more info on --message-format=json][cargo/3319]
1799 * [Assume `build.rs` in the same directory as `Cargo.toml` is a build script][cargo/3361]
1800 * [Don't ignore errors in workspace manifest][cargo/3409]
1801 * [Fix `--message-format JSON` when rustc emits non-JSON warnings][cargo/3410]
1806 * [Test runners (binaries built with `--test`) now support a `--list` argument
1807 that lists the tests it contains][38185]
1808 * [Test runners now support a `--exact` argument that makes the test filter
1809 match exactly, instead of matching only a substring of the test name][38181]
1810 * [rustdoc supports a `--playground-url` flag][37763]
1811 * [rustdoc provides more details about `#[should_panic]` errors][37749]
1816 * [The Rust build system is now written in Rust][37817]. The Makefiles may
1817 continue to be used in this release by passing `--disable-rustbuild` to the
1818 configure script, but they will be deleted soon. Note that the new build
1819 system uses a different on-disk layout that will likely affect any scripts
1821 * [Rust supports i686-unknown-openbsd][38086]. Tier 3 support. No testing or
1823 * [Rust supports the MSP430][37627]. Tier 3 support. No testing or releases.
1824 * [Rust supports the ARMv5TE architecture][37615]. Tier 3 support. No testing or
1830 * [A number of minor changes to name resolution have been activated][37127].
1831 They add up to more consistent semantics, allowing for future evolution of
1832 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
1833 details of what is different. The breaking changes here have been transitioned
1834 through the [`legacy_imports`] lint since 1.14, with no known regressions.
1835 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
1836 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
1837 should instead check the variable at runtime with `std::env`. That the value
1838 was set at build time was a bug, and incorrect when cross-compiling. This
1839 change is known to cause breakage.
1840 * [Higher-ranked lifetimes are no longer allowed to appear _only_ in associated
1841 types][33685]. The [`hr_lifetime_in_assoc_type` lint] has been a warning since
1842 1.10 and is now an error by default. It will become a hard error in the near
1844 * [The semantics relating modules to file system directories are changing in
1845 minor ways][37602]. This is captured in the new `legacy_directory_ownership`
1846 lint, which is a warning in this release, and will become a hard error in the
1848 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
1849 * [Once `Peekable` peeks a `None` it will return that `None` without re-querying
1850 the underlying iterator][37834]
1852 ["changes"]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md#changes-to-name-resolution-rules
1853 [33685]: https://github.com/rust-lang/rust/issues/33685
1854 [36868]: https://github.com/rust-lang/rust/pull/36868
1855 [37127]: https://github.com/rust-lang/rust/pull/37127
1856 [37229]: https://github.com/rust-lang/rust/pull/37229
1857 [37456]: https://github.com/rust-lang/rust/pull/37456
1858 [37527]: https://github.com/rust-lang/rust/pull/37527
1859 [37602]: https://github.com/rust-lang/rust/pull/37602
1860 [37613]: https://github.com/rust-lang/rust/pull/37613
1861 [37615]: https://github.com/rust-lang/rust/pull/37615
1862 [37636]: https://github.com/rust-lang/rust/pull/37636
1863 [37627]: https://github.com/rust-lang/rust/pull/37627
1864 [37642]: https://github.com/rust-lang/rust/pull/37642
1865 [37677]: https://github.com/rust-lang/rust/pull/37677
1866 [37699]: https://github.com/rust-lang/rust/pull/37699
1867 [37701]: https://github.com/rust-lang/rust/pull/37701
1868 [37705]: https://github.com/rust-lang/rust/pull/37705
1869 [37749]: https://github.com/rust-lang/rust/pull/37749
1870 [37760]: https://github.com/rust-lang/rust/pull/37760
1871 [37763]: https://github.com/rust-lang/rust/pull/37763
1872 [37764]: https://github.com/rust-lang/rust/pull/37764
1873 [37789]: https://github.com/rust-lang/rust/pull/37789
1874 [37791]: https://github.com/rust-lang/rust/pull/37791
1875 [37814]: https://github.com/rust-lang/rust/pull/37814
1876 [37817]: https://github.com/rust-lang/rust/pull/37817
1877 [37834]: https://github.com/rust-lang/rust/pull/37834
1878 [37848]: https://github.com/rust-lang/rust/pull/37848
1879 [37855]: https://github.com/rust-lang/rust/pull/37855
1880 [37882]: https://github.com/rust-lang/rust/pull/37882
1881 [37888]: https://github.com/rust-lang/rust/pull/37888
1882 [37973]: https://github.com/rust-lang/rust/pull/37973
1883 [37979]: https://github.com/rust-lang/rust/pull/37979
1884 [38086]: https://github.com/rust-lang/rust/pull/38086
1885 [38107]: https://github.com/rust-lang/rust/pull/38107
1886 [38117]: https://github.com/rust-lang/rust/pull/38117
1887 [38134]: https://github.com/rust-lang/rust/pull/38134
1888 [38146]: https://github.com/rust-lang/rust/pull/38146
1889 [38181]: https://github.com/rust-lang/rust/pull/38181
1890 [38182]: https://github.com/rust-lang/rust/pull/38182
1891 [38185]: https://github.com/rust-lang/rust/pull/38185
1892 [38192]: https://github.com/rust-lang/rust/pull/38192
1893 [38279]: https://github.com/rust-lang/rust/pull/38279
1894 [38835]: https://github.com/rust-lang/rust/pull/38835
1895 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
1896 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
1897 [RFC 1560]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md
1898 [RFC 1681]: https://github.com/rust-lang/rfcs/blob/master/text/1681-macros-1.1.md
1899 [RFC 1717]: https://github.com/rust-lang/rfcs/blob/master/text/1717-dllimport.md
1900 [`hr_lifetime_in_assoc_type` lint]: https://github.com/rust-lang/rust/issues/33685
1901 [`legacy_imports`]: https://github.com/rust-lang/rust/pull/38271
1902 [cargo/3102]: https://github.com/rust-lang/cargo/pull/3102
1903 [cargo/3221]: https://github.com/rust-lang/cargo/pull/3221
1904 [cargo/3310]: https://github.com/rust-lang/cargo/pull/3310
1905 [cargo/3311]: https://github.com/rust-lang/cargo/pull/3311
1906 [cargo/3319]: https://github.com/rust-lang/cargo/pull/3319
1907 [cargo/3336]: https://github.com/rust-lang/cargo/pull/3336
1908 [cargo/3338]: https://github.com/rust-lang/cargo/pull/3338
1909 [cargo/3348]: https://github.com/rust-lang/cargo/pull/3348
1910 [cargo/3356]: https://github.com/rust-lang/cargo/pull/3356
1911 [cargo/3361]: https://github.com/rust-lang/cargo/pull/3361
1912 [cargo/3363]: https://github.com/rust-lang/cargo/pull/3363
1913 [cargo/3368]: https://github.com/rust-lang/cargo/issues/3368
1914 [cargo/3409]: https://github.com/rust-lang/cargo/pull/3409
1915 [cargo/3410]: https://github.com/rust-lang/cargo/pull/3410
1916 [`std::iter::Iterator::min_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.min_by
1917 [`std::iter::Iterator::max_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.max_by
1918 [`std::os::*::fs::FileExt`]: https://doc.rust-lang.org/std/os/unix/fs/trait.FileExt.html
1919 [`std::sync::atomic::Atomic*::get_mut`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.get_mut
1920 [`std::sync::atomic::Atomic*::into_inner`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.into_inner
1921 [`std::vec::IntoIter::as_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_slice
1922 [`std::vec::IntoIter::as_mut_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_mut_slice
1923 [`std::sync::mpsc::Receiver::try_iter`]: https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.try_iter
1924 [`std::os::unix::process::CommandExt::before_exec`]: https://doc.rust-lang.org/std/os/unix/process/trait.CommandExt.html#tymethod.before_exec
1925 [`std::rc::Rc::strong_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.strong_count
1926 [`std::rc::Rc::weak_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.weak_count
1927 [`std::sync::Arc::strong_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.strong_count
1928 [`std::sync::Arc::weak_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.weak_count
1929 [`std::char::encode_utf8`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf8
1930 [`std::char::encode_utf16`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf16
1931 [`std::cell::Ref::clone`]: https://doc.rust-lang.org/std/cell/struct.Ref.html#method.clone
1932 [`std::io::Take::into_inner`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.into_inner
1935 Version 1.14.0 (2016-12-22)
1936 ===========================
1941 * [`..` matches multiple tuple fields in enum variants, structs
1942 and tuples][36843]. [RFC 1492].
1943 * [Safe `fn` items can be coerced to `unsafe fn` pointers][37389]
1944 * [`use *` and `use ::*` both glob-import from the crate root][37367]
1945 * [It's now possible to call a `Vec<Box<Fn()>>` without explicit
1946 dereferencing][36822]
1951 * [Mark enums with non-zero discriminant as non-zero][37224]
1952 * [Lower-case `static mut` names are linted like other
1953 statics and consts][37162]
1954 * [Fix ICE on some macros in const integer positions
1955 (e.g. `[u8; m!()]`)][36819]
1956 * [Improve error message and snippet for "did you mean `x`"][36798]
1957 * [Add a panic-strategy field to the target specification][36794]
1958 * [Include LLVM version in `--version --verbose`][37200]
1960 Compile-time Optimizations
1961 --------------------------
1963 * [Improve macro expansion performance][37569]
1964 * [Shrink `Expr_::ExprInlineAsm`][37445]
1965 * [Replace all uses of SHA-256 with BLAKE2b][37439]
1966 * [Reduce the number of bytes hashed by `IchHasher`][37427]
1967 * [Avoid more allocations when compiling html5ever][37373]
1968 * [Use `SmallVector` in `CombineFields::instantiate`][37322]
1969 * [Avoid some allocations in the macro parser][37318]
1970 * [Use a faster deflate setting][37298]
1971 * [Add `ArrayVec` and `AccumulateVec` to reduce heap allocations
1972 during interning of slices][37270]
1973 * [Optimize `write_metadata`][37267]
1974 * [Don't process obligation forest cycles when stalled][37231]
1975 * [Avoid many `CrateConfig` clones][37161]
1976 * [Optimize `Substs::super_fold_with`][37108]
1977 * [Optimize `ObligationForest`'s `NodeState` handling][36993]
1978 * [Speed up `plug_leaks`][36917]
1983 * [`println!()`, with no arguments, prints newline][36825].
1984 Previously, an empty string was required to achieve the same.
1985 * [`Wrapping` impls standard binary and unary operators, as well as
1986 the `Sum` and `Product` iterators][37356]
1987 * [Implement `From<Cow<str>> for String` and `From<Cow<[T]>> for
1989 * [Improve `fold` performance for `chain`, `cloned`, `map`, and
1990 `VecDeque` iterators][37315]
1991 * [Improve `SipHasher` performance on small values][37312]
1992 * [Add Iterator trait TrustedLen to enable better FromIterator /
1994 * [Expand `.zip()` specialization to `.map()` and `.cloned()`][37230]
1995 * [`ReadDir` implements `Debug`][37221]
1996 * [Implement `RefUnwindSafe` for atomic types][37178]
1997 * [Specialize `Vec::extend` to `Vec::extend_from_slice`][37094]
1998 * [Avoid allocations in `Decoder::read_str`][37064]
1999 * [`io::Error` implements `From<io::ErrorKind>`][37037]
2000 * [Impl `Debug` for raw pointers to unsized data][36880]
2001 * [Don't reuse `HashMap` random seeds][37470]
2002 * [The internal memory layout of `HashMap` is more cache-friendly, for
2003 significant improvements in some operations][36692]
2004 * [`HashMap` uses less memory on 32-bit architectures][36595]
2005 * [Impl `Add<{str, Cow<str>}>` for `Cow<str>`][36430]
2010 * [Expose rustc cfg values to build scripts][cargo/3243]
2011 * [Allow cargo to work with read-only `CARGO_HOME`][cargo/3259]
2012 * [Fix passing --features when testing multiple packages][cargo/3280]
2013 * [Use a single profile set per workspace][cargo/3249]
2014 * [Load `replace` sections from lock files][cargo/3220]
2015 * [Ignore `panic` configuration for test/bench profiles][cargo/3175]
2020 * [rustup is the recommended Rust installation method][1.14rustup]
2021 * This release includes host (rustc) builds for Linux on MIPS, PowerPC, and
2022 S390x. These are [tier 2] platforms and may have major defects. Follow the
2023 instructions on the website to install, or add the targets to an existing
2024 installation with `rustup target add`. The new target triples are:
2025 - `mips-unknown-linux-gnu`
2026 - `mipsel-unknown-linux-gnu`
2027 - `mips64-unknown-linux-gnuabi64`
2028 - `mips64el-unknown-linux-gnuabi64 `
2029 - `powerpc-unknown-linux-gnu`
2030 - `powerpc64-unknown-linux-gnu`
2031 - `powerpc64le-unknown-linux-gnu`
2032 - `s390x-unknown-linux-gnu `
2033 * This release includes target (std) builds for ARM Linux running MUSL
2034 libc. These are [tier 2] platforms and may have major defects. Add the
2035 following triples to an existing rustup installation with `rustup target add`:
2036 - `arm-unknown-linux-musleabi`
2037 - `arm-unknown-linux-musleabihf`
2038 - `armv7-unknown-linux-musleabihf`
2039 * This release includes [experimental support for WebAssembly][1.14wasm], via
2040 the `wasm32-unknown-emscripten` target. This target is known to have major
2041 defects. Please test, report, and fix.
2042 * rustup no longer installs documentation by default. Run `rustup
2043 component add rust-docs` to install.
2044 * [Fix line stepping in debugger][37310]
2045 * [Enable line number debuginfo in releases][37280]
2050 * [Disable jemalloc on aarch64/powerpc/mips][37392]
2051 * [Add support for Fuchsia OS][37313]
2052 * [Detect local-rebuild by only MAJOR.MINOR version][37273]
2057 * [A number of forward-compatibility lints used by the compiler
2058 to gradually introduce language changes have been converted
2059 to deny by default][36894]:
2060 - ["use of inaccessible extern crate erroneously allowed"][36886]
2061 - ["type parameter default erroneously allowed in invalid location"][36887]
2062 - ["detects super or self keywords at the beginning of global path"][36888]
2063 - ["two overlapping inherent impls define an item with the same name
2064 were erroneously allowed"][36889]
2065 - ["floating-point constants cannot be used in patterns"][36890]
2066 - ["constants of struct or enum type can only be used in a pattern if
2067 the struct or enum has `#[derive(PartialEq, Eq)]`"][36891]
2068 - ["lifetimes or labels named `'_` were erroneously allowed"][36892]
2069 * [Prohibit patterns in trait methods without bodies][37378]
2070 * [The atomic `Ordering` enum may not be matched exhaustively][37351]
2071 * [Future-proofing `#[no_link]` breaks some obscure cases][37247]
2072 * [The `$crate` macro variable is accepted in fewer locations][37213]
2073 * [Impls specifying extra region requirements beyond the trait
2074 they implement are rejected][37167]
2075 * [Enums may not be unsized][37111]. Unsized enums are intended to
2076 work but never have. For now they are forbidden.
2077 * [Enforce the shadowing restrictions from RFC 1560 for today's macros][36767]
2079 [tier 2]: https://forge.rust-lang.org/platform-support.html
2080 [1.14rustup]: https://internals.rust-lang.org/t/beta-testing-rustup-rs/3316/204
2081 [1.14wasm]: https://users.rust-lang.org/t/compiling-to-the-web-with-rust-and-emscripten/7627
2082 [36430]: https://github.com/rust-lang/rust/pull/36430
2083 [36595]: https://github.com/rust-lang/rust/pull/36595
2084 [36595]: https://github.com/rust-lang/rust/pull/36595
2085 [36692]: https://github.com/rust-lang/rust/pull/36692
2086 [36767]: https://github.com/rust-lang/rust/pull/36767
2087 [36794]: https://github.com/rust-lang/rust/pull/36794
2088 [36798]: https://github.com/rust-lang/rust/pull/36798
2089 [36819]: https://github.com/rust-lang/rust/pull/36819
2090 [36822]: https://github.com/rust-lang/rust/pull/36822
2091 [36825]: https://github.com/rust-lang/rust/pull/36825
2092 [36843]: https://github.com/rust-lang/rust/pull/36843
2093 [36880]: https://github.com/rust-lang/rust/pull/36880
2094 [36886]: https://github.com/rust-lang/rust/issues/36886
2095 [36887]: https://github.com/rust-lang/rust/issues/36887
2096 [36888]: https://github.com/rust-lang/rust/issues/36888
2097 [36889]: https://github.com/rust-lang/rust/issues/36889
2098 [36890]: https://github.com/rust-lang/rust/issues/36890
2099 [36891]: https://github.com/rust-lang/rust/issues/36891
2100 [36892]: https://github.com/rust-lang/rust/issues/36892
2101 [36894]: https://github.com/rust-lang/rust/pull/36894
2102 [36917]: https://github.com/rust-lang/rust/pull/36917
2103 [36993]: https://github.com/rust-lang/rust/pull/36993
2104 [37037]: https://github.com/rust-lang/rust/pull/37037
2105 [37064]: https://github.com/rust-lang/rust/pull/37064
2106 [37094]: https://github.com/rust-lang/rust/pull/37094
2107 [37108]: https://github.com/rust-lang/rust/pull/37108
2108 [37111]: https://github.com/rust-lang/rust/pull/37111
2109 [37161]: https://github.com/rust-lang/rust/pull/37161
2110 [37162]: https://github.com/rust-lang/rust/pull/37162
2111 [37167]: https://github.com/rust-lang/rust/pull/37167
2112 [37178]: https://github.com/rust-lang/rust/pull/37178
2113 [37200]: https://github.com/rust-lang/rust/pull/37200
2114 [37213]: https://github.com/rust-lang/rust/pull/37213
2115 [37221]: https://github.com/rust-lang/rust/pull/37221
2116 [37224]: https://github.com/rust-lang/rust/pull/37224
2117 [37230]: https://github.com/rust-lang/rust/pull/37230
2118 [37231]: https://github.com/rust-lang/rust/pull/37231
2119 [37247]: https://github.com/rust-lang/rust/pull/37247
2120 [37267]: https://github.com/rust-lang/rust/pull/37267
2121 [37270]: https://github.com/rust-lang/rust/pull/37270
2122 [37273]: https://github.com/rust-lang/rust/pull/37273
2123 [37280]: https://github.com/rust-lang/rust/pull/37280
2124 [37298]: https://github.com/rust-lang/rust/pull/37298
2125 [37306]: https://github.com/rust-lang/rust/pull/37306
2126 [37310]: https://github.com/rust-lang/rust/pull/37310
2127 [37312]: https://github.com/rust-lang/rust/pull/37312
2128 [37313]: https://github.com/rust-lang/rust/pull/37313
2129 [37315]: https://github.com/rust-lang/rust/pull/37315
2130 [37318]: https://github.com/rust-lang/rust/pull/37318
2131 [37322]: https://github.com/rust-lang/rust/pull/37322
2132 [37326]: https://github.com/rust-lang/rust/pull/37326
2133 [37351]: https://github.com/rust-lang/rust/pull/37351
2134 [37356]: https://github.com/rust-lang/rust/pull/37356
2135 [37367]: https://github.com/rust-lang/rust/pull/37367
2136 [37373]: https://github.com/rust-lang/rust/pull/37373
2137 [37378]: https://github.com/rust-lang/rust/pull/37378
2138 [37389]: https://github.com/rust-lang/rust/pull/37389
2139 [37392]: https://github.com/rust-lang/rust/pull/37392
2140 [37427]: https://github.com/rust-lang/rust/pull/37427
2141 [37439]: https://github.com/rust-lang/rust/pull/37439
2142 [37445]: https://github.com/rust-lang/rust/pull/37445
2143 [37470]: https://github.com/rust-lang/rust/pull/37470
2144 [37569]: https://github.com/rust-lang/rust/pull/37569
2145 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
2146 [cargo/3175]: https://github.com/rust-lang/cargo/pull/3175
2147 [cargo/3220]: https://github.com/rust-lang/cargo/pull/3220
2148 [cargo/3243]: https://github.com/rust-lang/cargo/pull/3243
2149 [cargo/3249]: https://github.com/rust-lang/cargo/pull/3249
2150 [cargo/3259]: https://github.com/rust-lang/cargo/pull/3259
2151 [cargo/3280]: https://github.com/rust-lang/cargo/pull/3280
2154 Version 1.13.0 (2016-11-10)
2155 ===========================
2160 * [Stabilize the `?` operator][36995]. `?` is a simple way to propagate
2161 errors, like the `try!` macro, described in [RFC 0243].
2162 * [Stabilize macros in type position][36014]. Described in [RFC 873].
2163 * [Stabilize attributes on statements][36995]. Described in [RFC 0016].
2164 * [Fix `#[derive]` for empty tuple structs/variants][35728]
2165 * [Fix lifetime rules for 'if' conditions][36029]
2166 * [Avoid loading and parsing unconfigured non-inline modules][36482]
2171 * [Add the `-C link-arg` argument][36574]
2172 * [Remove the old AST-based backend from rustc_trans][35764]
2173 * [Don't enable NEON by default on armv7 Linux][35814]
2174 * [Fix debug line number info for macro expansions][35238]
2175 * [Do not emit "class method" debuginfo for types that are not
2176 DICompositeType][36008]
2177 * [Warn about multiple conflicting #[repr] hints][34623]
2178 * [When sizing DST, don't double-count nested struct prefixes][36351]
2179 * [Default RUST_MIN_STACK to 16MiB for now][36505]
2180 * [Improve rlib metadata format][36551]. Reduces rlib size significantly.
2181 * [Reject macros with empty repetitions to avoid infinite loop][36721]
2182 * [Expand macros without recursing to avoid stack overflows][36214]
2187 * [Replace macro backtraces with labeled local uses][35702]
2188 * [Improve error message for misplaced doc comments][33922]
2189 * [Buffer unix and lock windows to prevent message interleaving][35975]
2190 * [Update lifetime errors to specifically note temporaries][36171]
2191 * [Special case a few colors for Windows][36178]
2192 * [Suggest `use self` when such an import resolves][36289]
2193 * [Be more specific when type parameter shadows primitive type][36338]
2194 * Many minor improvements
2196 Compile-time Optimizations
2197 --------------------------
2199 * [Compute and cache HIR hashes at beginning][35854]
2200 * [Don't hash types in loan paths][36004]
2201 * [Cache projections in trans][35761]
2202 * [Optimize the parser's last token handling][36527]
2203 * [Only instantiate #[inline] functions in codegen units referencing
2204 them][36524]. This leads to big improvements in cases where crates export
2205 define many inline functions without using them directly.
2206 * [Lazily allocate TypedArena's first chunk][36592]
2207 * [Don't allocate during default HashSet creation][36734]
2214 * [`overflowing_abs`]
2215 * [`RefCell::try_borrow`]
2216 * [`RefCell::try_borrow_mut`]
2221 * [Add `assert_ne!` and `debug_assert_ne!`][35074]
2222 * [Make `vec_deque::Drain`, `hash_map::Drain`, and `hash_set::Drain`
2224 * [Implement `AsRef<[T]>` for `std::slice::Iter`][35559]
2225 * [Implement `Debug` for `std::vec::IntoIter`][35707]
2226 * [`CString`: avoid excessive growth just to 0-terminate][35871]
2227 * [Implement `CoerceUnsized` for `{Cell, RefCell, UnsafeCell}`][35627]
2228 * [Use arc4rand on FreeBSD][35884]
2229 * [memrchr: Correct aligned offset computation][35969]
2230 * [Improve Demangling of Rust Symbols][36059]
2231 * [Use monotonic time in condition variables][35048]
2232 * [Implement `Debug` for `std::path::{Components,Iter}`][36101]
2233 * [Implement conversion traits for `char`][35755]
2234 * [Fix illegal instruction caused by overflow in channel cloning][36104]
2235 * [Zero first byte of CString on drop][36264]
2236 * [Inherit overflow checks for sum and product][36372]
2237 * [Add missing Eq implementations][36423]
2238 * [Implement `Debug` for `DirEntry`][36631]
2239 * [When `getaddrinfo` returns `EAI_SYSTEM` retrieve actual error from
2241 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
2242 * [Implement more traits for `std::io::ErrorKind`][35911]
2243 * [Optimize BinaryHeap bounds checking][36072]
2244 * [Work around pointer aliasing issue in `Vec::extend_from_slice`,
2245 `extend_with_element`][36355]
2246 * [Fix overflow checking in unsigned pow()][34942]
2251 * This release includes security fixes to both curl and OpenSSL.
2252 * [Fix transitive doctests when panic=abort][cargo/3021]
2253 * [Add --all-features flag to cargo][cargo/3038]
2254 * [Reject path-based dependencies in `cargo package`][cargo/3060]
2255 * [Don't parse the home directory more than once][cargo/3078]
2256 * [Don't try to generate Cargo.lock on empty workspaces][cargo/3092]
2257 * [Update OpenSSL to 1.0.2j][cargo/3121]
2258 * [Add license and license_file to cargo metadata output][cargo/3110]
2259 * [Make crates-io registry URL optional in config; ignore all changes to
2260 source.crates-io][cargo/3089]
2261 * [Don't download dependencies from other platforms][cargo/3123]
2262 * [Build transitive dev-dependencies when needed][cargo/3125]
2263 * [Add support for per-target rustflags in .cargo/config][cargo/3157]
2264 * [Avoid updating registry when adding existing deps][cargo/3144]
2265 * [Warn about path overrides that won't work][cargo/3136]
2266 * [Use workspaces during `cargo install`][cargo/3146]
2267 * [Leak mspdbsrv.exe processes on Windows][cargo/3162]
2268 * [Add --message-format flag][cargo/3000]
2269 * [Pass target environment for rustdoc][cargo/3205]
2270 * [Use `CommandExt::exec` for `cargo run` on Unix][cargo/2818]
2271 * [Update curl and curl-sys][cargo/3241]
2272 * [Call rustdoc test with the correct cfg flags of a package][cargo/3242]
2277 * [rustdoc: Add the `--sysroot` argument][36586]
2278 * [rustdoc: Fix a couple of issues with the search results][35655]
2279 * [rustdoc: remove the `!` from macro URLs and titles][35234]
2280 * [gdb: Fix pretty-printing special-cased Rust types][35585]
2281 * [rustdoc: Filter more incorrect methods inherited through Deref][36266]
2286 * [Remove unmaintained style guide][35124]
2287 * [Add s390x support][36369]
2288 * [Initial work at Haiku OS support][36727]
2289 * [Add mips-uclibc targets][35734]
2290 * [Crate-ify compiler-rt into compiler-builtins][35021]
2291 * [Add rustc version info (git hash + date) to dist tarball][36213]
2292 * Many documentation improvements
2297 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
2298 * [Deny (by default) transmuting from fn item types to pointer-sized
2299 types][34923]. Continuing the long transition to zero-sized fn items,
2301 * [Fix `#[derive]` for empty tuple structs/variants][35728].
2303 * [Issue deprecation warnings for safe accesses to extern statics][36173]
2304 * [Fix lifetime rules for 'if' conditions][36029].
2305 * [Inherit overflow checks for sum and product][36372].
2306 * [Forbid user-defined macros named "macro_rules"][36730].
2308 [33922]: https://github.com/rust-lang/rust/pull/33922
2309 [34623]: https://github.com/rust-lang/rust/pull/34623
2310 [34923]: https://github.com/rust-lang/rust/pull/34923
2311 [34942]: https://github.com/rust-lang/rust/pull/34942
2312 [34982]: https://github.com/rust-lang/rust/pull/34982
2313 [35021]: https://github.com/rust-lang/rust/pull/35021
2314 [35048]: https://github.com/rust-lang/rust/pull/35048
2315 [35074]: https://github.com/rust-lang/rust/pull/35074
2316 [35124]: https://github.com/rust-lang/rust/pull/35124
2317 [35234]: https://github.com/rust-lang/rust/pull/35234
2318 [35238]: https://github.com/rust-lang/rust/pull/35238
2319 [35354]: https://github.com/rust-lang/rust/pull/35354
2320 [35559]: https://github.com/rust-lang/rust/pull/35559
2321 [35585]: https://github.com/rust-lang/rust/pull/35585
2322 [35627]: https://github.com/rust-lang/rust/pull/35627
2323 [35655]: https://github.com/rust-lang/rust/pull/35655
2324 [35702]: https://github.com/rust-lang/rust/pull/35702
2325 [35707]: https://github.com/rust-lang/rust/pull/35707
2326 [35728]: https://github.com/rust-lang/rust/pull/35728
2327 [35734]: https://github.com/rust-lang/rust/pull/35734
2328 [35755]: https://github.com/rust-lang/rust/pull/35755
2329 [35761]: https://github.com/rust-lang/rust/pull/35761
2330 [35764]: https://github.com/rust-lang/rust/pull/35764
2331 [35814]: https://github.com/rust-lang/rust/pull/35814
2332 [35854]: https://github.com/rust-lang/rust/pull/35854
2333 [35871]: https://github.com/rust-lang/rust/pull/35871
2334 [35884]: https://github.com/rust-lang/rust/pull/35884
2335 [35911]: https://github.com/rust-lang/rust/pull/35911
2336 [35969]: https://github.com/rust-lang/rust/pull/35969
2337 [35975]: https://github.com/rust-lang/rust/pull/35975
2338 [36004]: https://github.com/rust-lang/rust/pull/36004
2339 [36008]: https://github.com/rust-lang/rust/pull/36008
2340 [36014]: https://github.com/rust-lang/rust/pull/36014
2341 [36029]: https://github.com/rust-lang/rust/pull/36029
2342 [36059]: https://github.com/rust-lang/rust/pull/36059
2343 [36072]: https://github.com/rust-lang/rust/pull/36072
2344 [36101]: https://github.com/rust-lang/rust/pull/36101
2345 [36104]: https://github.com/rust-lang/rust/pull/36104
2346 [36171]: https://github.com/rust-lang/rust/pull/36171
2347 [36173]: https://github.com/rust-lang/rust/pull/36173
2348 [36178]: https://github.com/rust-lang/rust/pull/36178
2349 [36213]: https://github.com/rust-lang/rust/pull/36213
2350 [36214]: https://github.com/rust-lang/rust/pull/36214
2351 [36264]: https://github.com/rust-lang/rust/pull/36264
2352 [36266]: https://github.com/rust-lang/rust/pull/36266
2353 [36289]: https://github.com/rust-lang/rust/pull/36289
2354 [36338]: https://github.com/rust-lang/rust/pull/36338
2355 [36351]: https://github.com/rust-lang/rust/pull/36351
2356 [36355]: https://github.com/rust-lang/rust/pull/36355
2357 [36369]: https://github.com/rust-lang/rust/pull/36369
2358 [36372]: https://github.com/rust-lang/rust/pull/36372
2359 [36423]: https://github.com/rust-lang/rust/pull/36423
2360 [36482]: https://github.com/rust-lang/rust/pull/36482
2361 [36505]: https://github.com/rust-lang/rust/pull/36505
2362 [36524]: https://github.com/rust-lang/rust/pull/36524
2363 [36527]: https://github.com/rust-lang/rust/pull/36527
2364 [36551]: https://github.com/rust-lang/rust/pull/36551
2365 [36574]: https://github.com/rust-lang/rust/pull/36574
2366 [36586]: https://github.com/rust-lang/rust/pull/36586
2367 [36592]: https://github.com/rust-lang/rust/pull/36592
2368 [36631]: https://github.com/rust-lang/rust/pull/36631
2369 [36639]: https://github.com/rust-lang/rust/pull/36639
2370 [36721]: https://github.com/rust-lang/rust/pull/36721
2371 [36727]: https://github.com/rust-lang/rust/pull/36727
2372 [36730]: https://github.com/rust-lang/rust/pull/36730
2373 [36734]: https://github.com/rust-lang/rust/pull/36734
2374 [36754]: https://github.com/rust-lang/rust/pull/36754
2375 [36995]: https://github.com/rust-lang/rust/pull/36995
2376 [RFC 0016]: https://github.com/rust-lang/rfcs/blob/master/text/0016-more-attributes.md
2377 [RFC 0243]: https://github.com/rust-lang/rfcs/blob/master/text/0243-trait-based-exception-handling.md
2378 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
2379 [RFC 401]: https://github.com/rust-lang/rfcs/blob/master/text/0401-coercions.md
2380 [RFC 873]: https://github.com/rust-lang/rfcs/blob/master/text/0873-type-macros.md
2381 [cargo/2818]: https://github.com/rust-lang/cargo/pull/2818
2382 [cargo/3000]: https://github.com/rust-lang/cargo/pull/3000
2383 [cargo/3021]: https://github.com/rust-lang/cargo/pull/3021
2384 [cargo/3038]: https://github.com/rust-lang/cargo/pull/3038
2385 [cargo/3060]: https://github.com/rust-lang/cargo/pull/3060
2386 [cargo/3078]: https://github.com/rust-lang/cargo/pull/3078
2387 [cargo/3089]: https://github.com/rust-lang/cargo/pull/3089
2388 [cargo/3092]: https://github.com/rust-lang/cargo/pull/3092
2389 [cargo/3110]: https://github.com/rust-lang/cargo/pull/3110
2390 [cargo/3121]: https://github.com/rust-lang/cargo/pull/3121
2391 [cargo/3123]: https://github.com/rust-lang/cargo/pull/3123
2392 [cargo/3125]: https://github.com/rust-lang/cargo/pull/3125
2393 [cargo/3136]: https://github.com/rust-lang/cargo/pull/3136
2394 [cargo/3144]: https://github.com/rust-lang/cargo/pull/3144
2395 [cargo/3146]: https://github.com/rust-lang/cargo/pull/3146
2396 [cargo/3157]: https://github.com/rust-lang/cargo/pull/3157
2397 [cargo/3162]: https://github.com/rust-lang/cargo/pull/3162
2398 [cargo/3205]: https://github.com/rust-lang/cargo/pull/3205
2399 [cargo/3241]: https://github.com/rust-lang/cargo/pull/3241
2400 [cargo/3242]: https://github.com/rust-lang/cargo/pull/3242
2401 [rustup]: https://www.rustup.rs
2402 [`checked_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.checked_abs
2403 [`wrapping_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.wrapping_abs
2404 [`overflowing_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.overflowing_abs
2405 [`RefCell::try_borrow`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow
2406 [`RefCell::try_borrow_mut`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow_mut
2407 [`SipHasher`]: https://doc.rust-lang.org/std/hash/struct.SipHasher.html
2408 [`DefaultHasher`]: https://doc.rust-lang.org/std/collections/hash_map/struct.DefaultHasher.html
2411 Version 1.12.1 (2016-10-20)
2412 ===========================
2417 * [ICE: 'rustc' panicked at 'assertion failed: concrete_substs.is_normalized_for_trans()' #36381][36381]
2418 * [Confusion with double negation and booleans][36856]
2419 * [rustc 1.12.0 fails with SIGSEGV in release mode (syn crate 0.8.0)][36875]
2420 * [Rustc 1.12.0 Windows build of `ethcore` crate fails with LLVM error][36924]
2421 * [1.12.0: High memory usage when linking in release mode with debug info][36926]
2422 * [Corrupted memory after updated to 1.12][36936]
2423 * ["Let NullaryConstructor = something;" causes internal compiler error: "tried to overwrite interned AdtDef"][37026]
2424 * [Fix ICE: inject bitcast if types mismatch for invokes/calls/stores][37112]
2425 * [debuginfo: Handle spread_arg case in MIR-trans in a more stable way.][37153]
2427 [36381]: https://github.com/rust-lang/rust/issues/36381
2428 [36856]: https://github.com/rust-lang/rust/issues/36856
2429 [36875]: https://github.com/rust-lang/rust/issues/36875
2430 [36924]: https://github.com/rust-lang/rust/issues/36924
2431 [36926]: https://github.com/rust-lang/rust/issues/36926
2432 [36936]: https://github.com/rust-lang/rust/issues/36936
2433 [37026]: https://github.com/rust-lang/rust/issues/37026
2434 [37112]: https://github.com/rust-lang/rust/issues/37112
2435 [37153]: https://github.com/rust-lang/rust/issues/37153
2438 Version 1.12.0 (2016-09-29)
2439 ===========================
2444 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)](https://github.com/rust-lang/rust/pull/34096).
2445 This translation pass is far simpler than the previous AST->LLVM pass, and
2446 creates opportunities to perform new optimizations directly on the MIR. It
2447 was previously described [on the Rust blog](https://blog.rust-lang.org/2016/04/19/MIR.html).
2448 * [`rustc` presents a new, more readable error format, along with
2449 machine-readable JSON error output for use by IDEs](https://github.com/rust-lang/rust/pull/35401).
2450 Most common editors supporting Rust have been updated to work with it. It was
2451 previously described [on the Rust blog](https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
2456 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)](https://github.com/rust-lang/rust/pull/34096).
2457 This translation pass is far simpler than the previous AST->LLVM pass, and
2458 creates opportunities to perform new optimizations directly on the MIR. It
2459 was previously described [on the Rust blog](https://blog.rust-lang.org/2016/04/19/MIR.html).
2460 * [Print the Rust target name, not the LLVM target name, with
2461 `--print target-list`](https://github.com/rust-lang/rust/pull/35489)
2462 * [The computation of `TypeId` is correct in some cases where it was previously
2463 producing inconsistent results](https://github.com/rust-lang/rust/pull/35267)
2464 * [The `mips-unknown-linux-gnu` target uses hardware floating point by default](https://github.com/rust-lang/rust/pull/34910)
2465 * [The `rustc` arguments, `--print target-cpus`, `--print target-features`,
2466 `--print relocation-models`, and `--print code-models` print the available
2467 options to the `-C target-cpu`, `-C target-feature`, `-C relocation-model` and
2468 `-C code-model` code generation arguments](https://github.com/rust-lang/rust/pull/34845)
2469 * [`rustc` supports three new MUSL targets on ARM: `arm-unknown-linux-musleabi`,
2470 `arm-unknown-linux-musleabihf`, and `armv7-unknown-linux-musleabihf`](https://github.com/rust-lang/rust/pull/35060).
2471 These targets produce statically-linked binaries. There are no binary release
2477 * [`rustc` presents a new, more readable error format, along with
2478 machine-readable JSON error output for use by IDEs](https://github.com/rust-lang/rust/pull/35401).
2479 Most common editors supporting Rust have been updated to work with it. It was
2480 previously described [on the Rust blog](https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
2481 * [In error descriptions, references are now described in plain English,
2482 instead of as "&-ptr"](https://github.com/rust-lang/rust/pull/35611)
2483 * [In error type descriptions, unknown numeric types are named `{integer}` or
2484 `{float}` instead of `_`](https://github.com/rust-lang/rust/pull/35080)
2485 * [`rustc` emits a clearer error when inner attributes follow a doc comment](https://github.com/rust-lang/rust/pull/34676)
2490 * [`macro_rules!` invocations can be made within `macro_rules!` invocations](https://github.com/rust-lang/rust/pull/34925)
2491 * [`macro_rules!` meta-variables are hygienic](https://github.com/rust-lang/rust/pull/35453)
2492 * [`macro_rules!` `tt` matchers can be reparsed correctly, making them much more
2493 useful](https://github.com/rust-lang/rust/pull/34908)
2494 * [`macro_rules!` `stmt` matchers correctly consume the entire contents when
2495 inside non-braces invocations](https://github.com/rust-lang/rust/pull/34886)
2496 * [Semicolons are properly required as statement delimiters inside
2497 `macro_rules!` invocations](https://github.com/rust-lang/rust/pull/34660)
2498 * [`cfg_attr` works on `path` attributes](https://github.com/rust-lang/rust/pull/34546)
2503 * [`Cell::as_ptr`](https://doc.rust-lang.org/std/cell/struct.Cell.html#method.as_ptr)
2504 * [`RefCell::as_ptr`](https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.as_ptr)
2505 * [`IpAddr::is_unspecified`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_unspecified)
2506 * [`IpAddr::is_loopback`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_loopback)
2507 * [`IpAddr::is_multicast`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_multicast)
2508 * [`Ipv4Addr::is_unspecified`](https://doc.rust-lang.org/std/net/struct.Ipv4Addr.html#method.is_unspecified)
2509 * [`Ipv6Addr::octets`](https://doc.rust-lang.org/std/net/struct.Ipv6Addr.html#method.octets)
2510 * [`LinkedList::contains`](https://doc.rust-lang.org/std/collections/linked_list/struct.LinkedList.html#method.contains)
2511 * [`VecDeque::contains`](https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.contains)
2512 * [`ExitStatusExt::from_raw`](https://doc.rust-lang.org/std/os/unix/process/trait.ExitStatusExt.html#tymethod.from_raw).
2513 Both on Unix and Windows.
2514 * [`Receiver::recv_timeout`](https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.recv_timeout)
2515 * [`RecvTimeoutError`](https://doc.rust-lang.org/std/sync/mpsc/enum.RecvTimeoutError.html)
2516 * [`BinaryHeap::peek_mut`](https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.peek_mut)
2517 * [`PeekMut`](https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html)
2518 * [`iter::Product`](https://doc.rust-lang.org/std/iter/trait.Product.html)
2519 * [`iter::Sum`](https://doc.rust-lang.org/std/iter/trait.Sum.html)
2520 * [`OccupiedEntry::remove_entry`](https://doc.rust-lang.org/std/collections/btree_map/struct.OccupiedEntry.html#method.remove_entry)
2521 * [`VacantEntry::into_key`](https://doc.rust-lang.org/std/collections/btree_map/struct.VacantEntry.html#method.into_key)
2526 * [The `format!` macro and friends now allow a single argument to be formatted
2527 in multiple styles](https://github.com/rust-lang/rust/pull/33642)
2528 * [The lifetime bounds on `[T]::binary_search_by` and
2529 `[T]::binary_search_by_key` have been adjusted to be more flexible](https://github.com/rust-lang/rust/pull/34762)
2530 * [`Option` implements `From` for its contained type](https://github.com/rust-lang/rust/pull/34828)
2531 * [`Cell`, `RefCell` and `UnsafeCell` implement `From` for their contained type](https://github.com/rust-lang/rust/pull/35392)
2532 * [`RwLock` panics if the reader count overflows](https://github.com/rust-lang/rust/pull/35378)
2533 * [`vec_deque::Drain`, `hash_map::Drain` and `hash_set::Drain` are covariant](https://github.com/rust-lang/rust/pull/35354)
2534 * [`vec::Drain` and `binary_heap::Drain` are covariant](https://github.com/rust-lang/rust/pull/34951)
2535 * [`Cow<str>` implements `FromIterator` for `char`, `&str` and `String`](https://github.com/rust-lang/rust/pull/35064)
2536 * [Sockets on Linux are correctly closed in subprocesses via `SOCK_CLOEXEC`](https://github.com/rust-lang/rust/pull/34946)
2537 * [`hash_map::Entry`, `hash_map::VacantEntry` and `hash_map::OccupiedEntry`
2538 implement `Debug`](https://github.com/rust-lang/rust/pull/34937)
2539 * [`btree_map::Entry`, `btree_map::VacantEntry` and `btree_map::OccupiedEntry`
2540 implement `Debug`](https://github.com/rust-lang/rust/pull/34885)
2541 * [`String` implements `AddAssign`](https://github.com/rust-lang/rust/pull/34890)
2542 * [Variadic `extern fn` pointers implement the `Clone`, `PartialEq`, `Eq`,
2543 `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and `fmt::Debug` traits](https://github.com/rust-lang/rust/pull/34879)
2544 * [`FileType` implements `Debug`](https://github.com/rust-lang/rust/pull/34757)
2545 * [References to `Mutex` and `RwLock` are unwind-safe](https://github.com/rust-lang/rust/pull/34756)
2546 * [`mpsc::sync_channel` `Receiver`s return any available message before
2547 reporting a disconnect](https://github.com/rust-lang/rust/pull/34731)
2548 * [Unicode definitions have been updated to 9.0](https://github.com/rust-lang/rust/pull/34599)
2549 * [`env` iterators implement `DoubleEndedIterator`](https://github.com/rust-lang/rust/pull/33312)
2554 * [Support local mirrors of registries](https://github.com/rust-lang/cargo/pull/2857)
2555 * [Add support for command aliases](https://github.com/rust-lang/cargo/pull/2679)
2556 * [Allow `opt-level="s"` / `opt-level="z"` in profile overrides](https://github.com/rust-lang/cargo/pull/3007)
2557 * [Make `cargo doc --open --target` work as expected](https://github.com/rust-lang/cargo/pull/2988)
2558 * [Speed up noop registry updates](https://github.com/rust-lang/cargo/pull/2974)
2559 * [Update OpenSSL](https://github.com/rust-lang/cargo/pull/2971)
2560 * [Fix `--panic=abort` with plugins](https://github.com/rust-lang/cargo/pull/2954)
2561 * [Always pass `-C metadata` to the compiler](https://github.com/rust-lang/cargo/pull/2946)
2562 * [Fix depending on git repos with workspaces](https://github.com/rust-lang/cargo/pull/2938)
2563 * [Add a `--lib` flag to `cargo new`](https://github.com/rust-lang/cargo/pull/2921)
2564 * [Add `http.cainfo` for custom certs](https://github.com/rust-lang/cargo/pull/2917)
2565 * [Indicate the compilation profile after compiling](https://github.com/rust-lang/cargo/pull/2909)
2566 * [Allow enabling features for dependencies with `--features`](https://github.com/rust-lang/cargo/pull/2876)
2567 * [Add `--jobs` flag to `cargo package`](https://github.com/rust-lang/cargo/pull/2867)
2568 * [Add `--dry-run` to `cargo publish`](https://github.com/rust-lang/cargo/pull/2849)
2569 * [Add support for `RUSTDOCFLAGS`](https://github.com/rust-lang/cargo/pull/2794)
2574 * [`panic::catch_unwind` is more optimized](https://github.com/rust-lang/rust/pull/35444)
2575 * [`panic::catch_unwind` no longer accesses thread-local storage on entry](https://github.com/rust-lang/rust/pull/34866)
2580 * [Test binaries now support a `--test-threads` argument to specify the number
2581 of threads used to run tests, and which acts the same as the
2582 `RUST_TEST_THREADS` environment variable](https://github.com/rust-lang/rust/pull/35414)
2583 * [The test runner now emits a warning when tests run over 60 seconds](https://github.com/rust-lang/rust/pull/35405)
2584 * [rustdoc: Fix methods in search results](https://github.com/rust-lang/rust/pull/34752)
2585 * [`rust-lldb` warns about unsupported versions of LLDB](https://github.com/rust-lang/rust/pull/34646)
2586 * [Rust releases now come with source packages that can be installed by rustup
2587 via `rustup component add rust-src`](https://github.com/rust-lang/rust/pull/34366).
2588 The resulting source code can be used by tools and IDES, located in the
2589 sysroot under `lib/rustlib/src`.
2594 * [The compiler can now be built against LLVM 3.9](https://github.com/rust-lang/rust/pull/35594)
2595 * Many minor improvements to the documentation.
2596 * [The Rust exception handling "personality" routine is now written in Rust](https://github.com/rust-lang/rust/pull/34832)
2601 * [When printing Windows `OsStr`s, unpaired surrogate codepoints are escaped
2602 with the lowercase format instead of the uppercase](https://github.com/rust-lang/rust/pull/35084)
2603 * [When formatting strings, if "precision" is specified, the "fill",
2604 "align" and "width" specifiers are no longer ignored](https://github.com/rust-lang/rust/pull/34544)
2605 * [The `Debug` impl for strings no longer escapes all non-ASCII characters](https://github.com/rust-lang/rust/pull/34485)
2608 Version 1.11.0 (2016-08-18)
2609 ===========================
2614 * [`cfg_attr` works on `path` attributes](https://github.com/rust-lang/rust/pull/34546)
2615 * [Support nested `cfg_attr` attributes](https://github.com/rust-lang/rust/pull/34216)
2616 * [Allow statement-generating braced macro invocations at the end of blocks](https://github.com/rust-lang/rust/pull/34436)
2617 * [Macros can be expanded inside of trait definitions](https://github.com/rust-lang/rust/pull/34213)
2618 * [`#[macro_use]` works properly when it is itself expanded from a macro](https://github.com/rust-lang/rust/pull/34032)
2623 * [`BinaryHeap::append`](https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.append)
2624 * [`BTreeMap::append`](https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.append)
2625 * [`BTreeMap::split_off`](https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.split_off)
2626 * [`BTreeSet::append`](https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.append)
2627 * [`BTreeSet::split_off`](https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.split_off)
2628 * [`f32::to_degrees`](https://doc.rust-lang.org/std/primitive.f32.html#method.to_degrees)
2629 (in libcore - previously stabilized in libstd)
2630 * [`f32::to_radians`](https://doc.rust-lang.org/std/primitive.f32.html#method.to_radians)
2631 (in libcore - previously stabilized in libstd)
2632 * [`f64::to_degrees`](https://doc.rust-lang.org/std/primitive.f64.html#method.to_degrees)
2633 (in libcore - previously stabilized in libstd)
2634 * [`f64::to_radians`](https://doc.rust-lang.org/std/primitive.f64.html#method.to_radians)
2635 (in libcore - previously stabilized in libstd)
2636 * [`Iterator::sum`](https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
2637 * [`Iterator::product`](https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
2638 * [`Cell::get_mut`](https://doc.rust-lang.org/std/cell/struct.Cell.html#method.get_mut)
2639 * [`RefCell::get_mut`](https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.get_mut)
2644 * [The `thread_local!` macro supports multiple definitions in a single
2645 invocation, and can apply attributes](https://github.com/rust-lang/rust/pull/34077)
2646 * [`Cow` implements `Default`](https://github.com/rust-lang/rust/pull/34305)
2647 * [`Wrapping` implements binary, octal, lower-hex and upper-hex
2648 `Display` formatting](https://github.com/rust-lang/rust/pull/34190)
2649 * [The range types implement `Hash`](https://github.com/rust-lang/rust/pull/34180)
2650 * [`lookup_host` ignores unknown address types](https://github.com/rust-lang/rust/pull/34067)
2651 * [`assert_eq!` accepts a custom error message, like `assert!` does](https://github.com/rust-lang/rust/pull/33976)
2652 * [The main thread is now called "main" instead of "<main>"](https://github.com/rust-lang/rust/pull/33803)
2657 * [Disallow specifying features of transitive deps](https://github.com/rust-lang/cargo/pull/2821)
2658 * [Add color support for Windows consoles](https://github.com/rust-lang/cargo/pull/2804)
2659 * [Fix `harness = false` on `[lib]` sections](https://github.com/rust-lang/cargo/pull/2795)
2660 * [Don't panic when `links` contains a '.'](https://github.com/rust-lang/cargo/pull/2787)
2661 * [Build scripts can emit warnings](https://github.com/rust-lang/cargo/pull/2630),
2662 and `-vv` prints warnings for all crates.
2663 * [Ignore file locks on OS X NFS mounts](https://github.com/rust-lang/cargo/pull/2720)
2664 * [Don't warn about `package.metadata` keys](https://github.com/rust-lang/cargo/pull/2668).
2665 This provides room for expansion by arbitrary tools.
2666 * [Add support for cdylib crate types](https://github.com/rust-lang/cargo/pull/2741)
2667 * [Prevent publishing crates when files are dirty](https://github.com/rust-lang/cargo/pull/2781)
2668 * [Don't fetch all crates on clean](https://github.com/rust-lang/cargo/pull/2704)
2669 * [Propagate --color option to rustc](https://github.com/rust-lang/cargo/pull/2779)
2670 * [Fix `cargo doc --open` on Windows](https://github.com/rust-lang/cargo/pull/2780)
2671 * [Improve autocompletion](https://github.com/rust-lang/cargo/pull/2772)
2672 * [Configure colors of stderr as well as stdout](https://github.com/rust-lang/cargo/pull/2739)
2677 * [Caching projections speeds up type check dramatically for some
2678 workloads](https://github.com/rust-lang/rust/pull/33816)
2679 * [The default `HashMap` hasher is SipHash 1-3 instead of SipHash 2-4](https://github.com/rust-lang/rust/pull/33940)
2680 This hasher is faster, but is believed to provide sufficient
2681 protection from collision attacks.
2682 * [Comparison of `Ipv4Addr` is 10x faster](https://github.com/rust-lang/rust/pull/33891)
2687 * [Fix empty implementation section on some module pages](https://github.com/rust-lang/rust/pull/34536)
2688 * [Fix inlined renamed re-exports in import lists](https://github.com/rust-lang/rust/pull/34479)
2689 * [Fix search result layout for enum variants and struct fields](https://github.com/rust-lang/rust/pull/34477)
2690 * [Fix issues with source links to external crates](https://github.com/rust-lang/rust/pull/34387)
2691 * [Fix redirect pages for renamed re-exports](https://github.com/rust-lang/rust/pull/34245)
2696 * [rustc is better at finding the MSVC toolchain](https://github.com/rust-lang/rust/pull/34492)
2697 * [When emitting debug info, rustc emits frame pointers for closures,
2698 shims and glue, as it does for all other functions](https://github.com/rust-lang/rust/pull/33909)
2699 * [rust-lldb warns about unsupported versions of LLDB](https://github.com/rust-lang/rust/pull/34646)
2700 * Many more errors have been given error codes and extended
2702 * API documentation continues to be improved, with many new examples
2707 * [rustc no longer hangs when dependencies recursively re-export
2708 submodules](https://github.com/rust-lang/rust/pull/34542)
2709 * [rustc requires LLVM 3.7+](https://github.com/rust-lang/rust/pull/34104)
2710 * [The 'How Safe and Unsafe Interact' chapter of The Rustonomicon was
2711 rewritten](https://github.com/rust-lang/rust/pull/33895)
2712 * [rustc support 16-bit pointer sizes](https://github.com/rust-lang/rust/pull/33460).
2713 No targets use this yet, but it works toward AVR support.
2718 * [`const`s and `static`s may not have unsized types](https://github.com/rust-lang/rust/pull/34443)
2719 * [The new follow-set rules that place restrictions on `macro_rules!`
2720 in order to ensure syntax forward-compatibility have been enabled](https://github.com/rust-lang/rust/pull/33982)
2721 This was an [amendment to RFC 550](https://github.com/rust-lang/rfcs/pull/1384),
2722 and has been a warning since 1.10.
2723 * [`cfg` attribute process has been refactored to fix various bugs](https://github.com/rust-lang/rust/pull/33706).
2724 This causes breakage in some corner cases.
2727 Version 1.10.0 (2016-07-07)
2728 ===========================
2733 * [Allow `concat_idents!` in type positions as well as in expression
2734 positions](https://github.com/rust-lang/rust/pull/33735).
2735 * [`Copy` types are required to have a trivial implementation of `Clone`](https://github.com/rust-lang/rust/pull/33420).
2736 [RFC 1521](https://github.com/rust-lang/rfcs/blob/master/text/1521-copy-clone-semantics.md).
2737 * [Single-variant enums support the `#[repr(..)]` attribute](https://github.com/rust-lang/rust/pull/33355).
2738 * [Fix `#[derive(RustcEncodable)]` in the presence of other `encode` methods](https://github.com/rust-lang/rust/pull/32908).
2739 * [`panic!` can be converted to a runtime abort with the
2740 `-C panic=abort` flag](https://github.com/rust-lang/rust/pull/32900).
2741 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
2742 * [Add a new crate type, 'cdylib'](https://github.com/rust-lang/rust/pull/33553).
2743 cdylibs are dynamic libraries suitable for loading by non-Rust hosts.
2744 [RFC 1510](https://github.com/rust-lang/rfcs/blob/master/text/1510-rdylib.md).
2745 Note that Cargo does not yet directly support cdylibs.
2750 * `os::windows::fs::OpenOptionsExt::access_mode`
2751 * `os::windows::fs::OpenOptionsExt::share_mode`
2752 * `os::windows::fs::OpenOptionsExt::custom_flags`
2753 * `os::windows::fs::OpenOptionsExt::attributes`
2754 * `os::windows::fs::OpenOptionsExt::security_qos_flags`
2755 * `os::unix::fs::OpenOptionsExt::custom_flags`
2756 * [`sync::Weak::new`](http://doc.rust-lang.org/alloc/arc/struct.Weak.html#method.new)
2757 * `Default for sync::Weak`
2758 * [`panic::set_hook`](http://doc.rust-lang.org/std/panic/fn.set_hook.html)
2759 * [`panic::take_hook`](http://doc.rust-lang.org/std/panic/fn.take_hook.html)
2760 * [`panic::PanicInfo`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html)
2761 * [`panic::PanicInfo::payload`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.payload)
2762 * [`panic::PanicInfo::location`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.location)
2763 * [`panic::Location`](http://doc.rust-lang.org/std/panic/struct.Location.html)
2764 * [`panic::Location::file`](http://doc.rust-lang.org/std/panic/struct.Location.html#method.file)
2765 * [`panic::Location::line`](http://doc.rust-lang.org/std/panic/struct.Location.html#method.line)
2766 * [`ffi::CStr::from_bytes_with_nul`](http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul)
2767 * [`ffi::CStr::from_bytes_with_nul_unchecked`](http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul_unchecked)
2768 * [`ffi::FromBytesWithNulError`](http://doc.rust-lang.org/std/ffi/struct.FromBytesWithNulError.html)
2769 * [`fs::Metadata::modified`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.modified)
2770 * [`fs::Metadata::accessed`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.accessed)
2771 * [`fs::Metadata::created`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.created)
2772 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange`
2773 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange_weak`
2774 * `collections::{btree,hash}_map::{Occupied,Vacant,}Entry::key`
2775 * `os::unix::net::{UnixStream, UnixListener, UnixDatagram, SocketAddr}`
2776 * [`SocketAddr::is_unnamed`](http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.is_unnamed)
2777 * [`SocketAddr::as_pathname`](http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.as_pathname)
2778 * [`UnixStream::connect`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.connect)
2779 * [`UnixStream::pair`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.pair)
2780 * [`UnixStream::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.try_clone)
2781 * [`UnixStream::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.local_addr)
2782 * [`UnixStream::peer_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.peer_addr)
2783 * [`UnixStream::set_read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
2784 * [`UnixStream::set_write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
2785 * [`UnixStream::read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
2786 * [`UnixStream::write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
2787 * [`UnixStream::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.set_nonblocking)
2788 * [`UnixStream::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.take_error)
2789 * [`UnixStream::shutdown`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.shutdown)
2790 * Read/Write/RawFd impls for `UnixStream`
2791 * [`UnixListener::bind`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.bind)
2792 * [`UnixListener::accept`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.accept)
2793 * [`UnixListener::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.try_clone)
2794 * [`UnixListener::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.local_addr)
2795 * [`UnixListener::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.set_nonblocking)
2796 * [`UnixListener::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.take_error)
2797 * [`UnixListener::incoming`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.incoming)
2798 * RawFd impls for `UnixListener`
2799 * [`UnixDatagram::bind`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.bind)
2800 * [`UnixDatagram::unbound`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.unbound)
2801 * [`UnixDatagram::pair`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.pair)
2802 * [`UnixDatagram::connect`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.connect)
2803 * [`UnixDatagram::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.try_clone)
2804 * [`UnixDatagram::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.local_addr)
2805 * [`UnixDatagram::peer_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.peer_addr)
2806 * [`UnixDatagram::recv_from`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv_from)
2807 * [`UnixDatagram::recv`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv)
2808 * [`UnixDatagram::send_to`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send_to)
2809 * [`UnixDatagram::send`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send)
2810 * [`UnixDatagram::set_read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_read_timeout)
2811 * [`UnixDatagram::set_write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_write_timeout)
2812 * [`UnixDatagram::read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.read_timeout)
2813 * [`UnixDatagram::write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.write_timeout)
2814 * [`UnixDatagram::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_nonblocking)
2815 * [`UnixDatagram::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.take_error)
2816 * [`UnixDatagram::shutdown`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.shutdown)
2817 * RawFd impls for `UnixDatagram`
2818 * `{BTree,Hash}Map::values_mut`
2819 * [`<[_]>::binary_search_by_key`](http://doc.rust-lang.org/beta/std/primitive.slice.html#method.binary_search_by_key)
2824 * [The `abs_sub` method of floats is deprecated](https://github.com/rust-lang/rust/pull/33664).
2825 The semantics of this minor method are subtle and probably not what
2827 * [Add implementation of Ord for Cell<T> and RefCell<T> where T: Ord](https://github.com/rust-lang/rust/pull/33306).
2828 * [On Linux, if `HashMap`s can't be initialized with `getrandom` they
2829 will fall back to `/dev/urandom` temporarily to avoid blocking
2830 during early boot](https://github.com/rust-lang/rust/pull/33086).
2831 * [Implemented negation for wrapping numerals](https://github.com/rust-lang/rust/pull/33067).
2832 * [Implement `Clone` for `binary_heap::IntoIter`](https://github.com/rust-lang/rust/pull/33050).
2833 * [Implement `Display` and `Hash` for `std::num::Wrapping`](https://github.com/rust-lang/rust/pull/33023).
2834 * [Add `Default` implementation for `&CStr`, `CString`](https://github.com/rust-lang/rust/pull/32990).
2835 * [Implement `From<Vec<T>>` and `Into<Vec<T>>` for `VecDeque<T>`](https://github.com/rust-lang/rust/pull/32866).
2836 * [Implement `Default` for `UnsafeCell`, `fmt::Error`, `Condvar`,
2837 `Mutex`, `RwLock`](https://github.com/rust-lang/rust/pull/32785).
2841 * [Cargo.toml supports the `profile.*.panic` option](https://github.com/rust-lang/cargo/pull/2687).
2842 This controls the runtime behavior of the `panic!` macro
2843 and can be either "unwind" (the default), or "abort".
2844 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
2845 * [Don't throw away errors with `-p` arguments](https://github.com/rust-lang/cargo/pull/2723).
2846 * [Report status to stderr instead of stdout](https://github.com/rust-lang/cargo/pull/2693).
2847 * [Build scripts are passed a `CARGO_MANIFEST_LINKS` environment
2848 variable that corresponds to the `links` field of the manifest](https://github.com/rust-lang/cargo/pull/2710).
2849 * [Ban keywords from crate names](https://github.com/rust-lang/cargo/pull/2707).
2850 * [Canonicalize `CARGO_HOME` on Windows](https://github.com/rust-lang/cargo/pull/2604).
2851 * [Retry network requests](https://github.com/rust-lang/cargo/pull/2396).
2852 By default they are retried twice, which can be customized with the
2853 `net.retry` value in `.cargo/config`.
2854 * [Don't print extra error info for failing subcommands](https://github.com/rust-lang/cargo/pull/2674).
2855 * [Add `--force` flag to `cargo install`](https://github.com/rust-lang/cargo/pull/2405).
2856 * [Don't use `flock` on NFS mounts](https://github.com/rust-lang/cargo/pull/2623).
2857 * [Prefer building `cargo install` artifacts in temporary directories](https://github.com/rust-lang/cargo/pull/2610).
2858 Makes it possible to install multiple crates in parallel.
2859 * [Add `cargo test --doc`](https://github.com/rust-lang/cargo/pull/2578).
2860 * [Add `cargo --explain`](https://github.com/rust-lang/cargo/pull/2551).
2861 * [Don't print warnings when `-q` is passed](https://github.com/rust-lang/cargo/pull/2576).
2862 * [Add `cargo doc --lib` and `--bin`](https://github.com/rust-lang/cargo/pull/2577).
2863 * [Don't require build script output to be UTF-8](https://github.com/rust-lang/cargo/pull/2560).
2864 * [Correctly attempt multiple git usernames](https://github.com/rust-lang/cargo/pull/2584).
2869 * [rustc memory usage was reduced by refactoring the context used for
2870 type checking](https://github.com/rust-lang/rust/pull/33425).
2871 * [Speed up creation of `HashMap`s by caching the random keys used
2872 to initialize the hash state](https://github.com/rust-lang/rust/pull/33318).
2873 * [The `find` implementation for `Chain` iterators is 2x faster](https://github.com/rust-lang/rust/pull/33289).
2874 * [Trait selection optimizations speed up type checking by 15%](https://github.com/rust-lang/rust/pull/33138).
2875 * [Efficient trie lookup for boolean Unicode properties](https://github.com/rust-lang/rust/pull/33098).
2876 10x faster than the previous lookup tables.
2877 * [Special case `#[derive(Copy, Clone)]` to avoid bloat](https://github.com/rust-lang/rust/pull/31414).
2882 * Many incremental improvements to documentation and rustdoc.
2883 * [rustdoc: List blanket trait impls](https://github.com/rust-lang/rust/pull/33514).
2884 * [rustdoc: Clean up ABI rendering](https://github.com/rust-lang/rust/pull/33151).
2885 * [Indexing with the wrong type produces a more informative error](https://github.com/rust-lang/rust/pull/33401).
2886 * [Improve diagnostics for constants being used in irrefutable patterns](https://github.com/rust-lang/rust/pull/33406).
2887 * [When many method candidates are in scope limit the suggestions to 10](https://github.com/rust-lang/rust/pull/33338).
2888 * [Remove confusing suggestion when calling a `fn` type](https://github.com/rust-lang/rust/pull/33325).
2889 * [Do not suggest changing `&mut self` to `&mut mut self`](https://github.com/rust-lang/rust/pull/33319).
2894 * [Update i686-linux-android features to match Android ABI](https://github.com/rust-lang/rust/pull/33651).
2895 * [Update aarch64-linux-android features to match Android ABI](https://github.com/rust-lang/rust/pull/33500).
2896 * [`std` no longer prints backtraces on platforms where the running
2897 module must be loaded with `env::current_exe`, which can't be relied
2898 on](https://github.com/rust-lang/rust/pull/33554).
2899 * This release includes std binaries for the i586-unknown-linux-gnu,
2900 i686-unknown-linux-musl, and armv7-linux-androideabi targets. The
2901 i586 target is for old x86 hardware without SSE2, and the armv7
2902 target is for Android running on modern ARM architectures.
2903 * [The `rust-gdb` and `rust-lldb` scripts are distributed on all
2904 Unix platforms](https://github.com/rust-lang/rust/pull/32835).
2905 * [On Unix the runtime aborts by calling `libc::abort` instead of
2906 generating an illegal instruction](https://github.com/rust-lang/rust/pull/31457).
2907 * [Rust is now bootstrapped from the previous release of Rust,
2908 instead of a snapshot from an arbitrary commit](https://github.com/rust-lang/rust/pull/32942).
2913 * [`AtomicBool` is now bool-sized, not word-sized](https://github.com/rust-lang/rust/pull/33579).
2914 * [`target_env` for Linux ARM targets is just `gnu`, not
2915 `gnueabihf`, `gnueabi`, etc](https://github.com/rust-lang/rust/pull/33403).
2916 * [Consistently panic on overflow in `Duration::new`](https://github.com/rust-lang/rust/pull/33072).
2917 * [Change `String::truncate` to panic less](https://github.com/rust-lang/rust/pull/32977).
2918 * [Add `:block` to the follow set for `:ty` and `:path`](https://github.com/rust-lang/rust/pull/32945).
2919 Affects how macros are parsed.
2920 * [Fix macro hygiene bug](https://github.com/rust-lang/rust/pull/32923).
2921 * [Feature-gated attributes on macro-generated macro invocations are
2922 now rejected](https://github.com/rust-lang/rust/pull/32791).
2923 * [Suppress fallback and ambiguity errors during type inference](https://github.com/rust-lang/rust/pull/32258).
2924 This caused some minor changes to type inference.
2927 Version 1.9.0 (2016-05-26)
2928 ==========================
2933 * The `#[deprecated]` attribute when applied to an API will generate
2934 warnings when used. The warnings may be suppressed with
2935 `#[allow(deprecated)]`. [RFC 1270].
2936 * [`fn` item types are zero sized, and each `fn` names a unique
2937 type][1.9fn]. This will break code that transmutes `fn`s, so calling
2938 `transmute` on a `fn` type will generate a warning for a few cycles,
2939 then will be converted to an error.
2940 * [Field and method resolution understand visibility, so private
2941 fields and methods cannot prevent the proper use of public fields
2942 and methods][1.9fv].
2943 * [The parser considers unicode codepoints in the
2944 `PATTERN_WHITE_SPACE` category to be whitespace][1.9ws].
2950 * [`std::panic::catch_unwind`][] (renamed from `recover`)
2951 * [`std::panic::resume_unwind`][] (renamed from `propagate`)
2952 * [`std::panic::AssertUnwindSafe`][] (renamed from `AssertRecoverSafe`)
2953 * [`std::panic::UnwindSafe`][] (renamed from `RecoverSafe`)
2954 * [`str::is_char_boundary`]
2955 * [`<*const T>::as_ref`]
2956 * [`<*mut T>::as_ref`]
2957 * [`<*mut T>::as_mut`]
2958 * [`AsciiExt::make_ascii_uppercase`]
2959 * [`AsciiExt::make_ascii_lowercase`]
2960 * [`char::decode_utf16`]
2961 * [`char::DecodeUtf16`]
2962 * [`char::DecodeUtf16Error`]
2963 * [`char::DecodeUtf16Error::unpaired_surrogate`]
2964 * [`BTreeSet::take`]
2965 * [`BTreeSet::replace`]
2968 * [`HashSet::replace`]
2970 * [`OsString::with_capacity`]
2971 * [`OsString::clear`]
2972 * [`OsString::capacity`]
2973 * [`OsString::reserve`]
2974 * [`OsString::reserve_exact`]
2975 * [`OsStr::is_empty`]
2977 * [`std::os::unix::thread`]
2980 * [`JoinHandleExt::as_pthread_t`]
2981 * [`JoinHandleExt::into_pthread_t`]
2982 * [`HashSet::hasher`]
2983 * [`HashMap::hasher`]
2984 * [`CommandExt::exec`]
2985 * [`File::try_clone`]
2986 * [`SocketAddr::set_ip`]
2987 * [`SocketAddr::set_port`]
2988 * [`SocketAddrV4::set_ip`]
2989 * [`SocketAddrV4::set_port`]
2990 * [`SocketAddrV6::set_ip`]
2991 * [`SocketAddrV6::set_port`]
2992 * [`SocketAddrV6::set_flowinfo`]
2993 * [`SocketAddrV6::set_scope_id`]
2994 * [`slice::copy_from_slice`]
2995 * [`ptr::read_volatile`]
2996 * [`ptr::write_volatile`]
2997 * [`OpenOptions::create_new`]
2998 * [`TcpStream::set_nodelay`]
2999 * [`TcpStream::nodelay`]
3000 * [`TcpStream::set_ttl`]
3001 * [`TcpStream::ttl`]
3002 * [`TcpStream::set_only_v6`]
3003 * [`TcpStream::only_v6`]
3004 * [`TcpStream::take_error`]
3005 * [`TcpStream::set_nonblocking`]
3006 * [`TcpListener::set_ttl`]
3007 * [`TcpListener::ttl`]
3008 * [`TcpListener::set_only_v6`]
3009 * [`TcpListener::only_v6`]
3010 * [`TcpListener::take_error`]
3011 * [`TcpListener::set_nonblocking`]
3012 * [`UdpSocket::set_broadcast`]
3013 * [`UdpSocket::broadcast`]
3014 * [`UdpSocket::set_multicast_loop_v4`]
3015 * [`UdpSocket::multicast_loop_v4`]
3016 * [`UdpSocket::set_multicast_ttl_v4`]
3017 * [`UdpSocket::multicast_ttl_v4`]
3018 * [`UdpSocket::set_multicast_loop_v6`]
3019 * [`UdpSocket::multicast_loop_v6`]
3020 * [`UdpSocket::set_multicast_ttl_v6`]
3021 * [`UdpSocket::multicast_ttl_v6`]
3022 * [`UdpSocket::set_ttl`]
3023 * [`UdpSocket::ttl`]
3024 * [`UdpSocket::set_only_v6`]
3025 * [`UdpSocket::only_v6`]
3026 * [`UdpSocket::join_multicast_v4`]
3027 * [`UdpSocket::join_multicast_v6`]
3028 * [`UdpSocket::leave_multicast_v4`]
3029 * [`UdpSocket::leave_multicast_v6`]
3030 * [`UdpSocket::take_error`]
3031 * [`UdpSocket::connect`]
3032 * [`UdpSocket::send`]
3033 * [`UdpSocket::recv`]
3034 * [`UdpSocket::set_nonblocking`]
3039 * [`std::sync::Once` is poisoned if its initialization function
3041 * [`cell::Ref` and `cell::RefMut` can contain unsized types][1.9cu].
3042 * [Most types implement `fmt::Debug`][1.9db].
3043 * [The default buffer size used by `BufReader` and `BufWriter` was
3044 reduced to 8K, from 64K][1.9bf]. This is in line with the buffer size
3045 used by other languages.
3046 * [`Instant`, `SystemTime` and `Duration` implement `+=` and `-=`.
3047 `Duration` additionally implements `*=` and `/=`][1.9ta].
3048 * [`Skip` is a `DoubleEndedIterator`][1.9sk].
3049 * [`From<[u8; 4]>` is implemented for `Ipv4Addr`][1.9fi].
3050 * [`Chain` implements `BufRead`][1.9ch].
3051 * [`HashMap`, `HashSet` and iterators are covariant][1.9hc].
3056 * [Cargo can now run concurrently][1.9cc].
3057 * [Top-level overrides allow specific revisions of crates to be
3058 overridden through the entire crate graph][1.9ct]. This is intended
3059 to make upgrades easier for large projects, by allowing crates to be
3060 forked temporarily until they've been upgraded and republished.
3061 * [Cargo exports a `CARGO_PKG_AUTHORS` environment variable][1.9cp].
3062 * [Cargo will pass the contents of the `RUSTFLAGS` variable to `rustc`
3063 on the commandline][1.9cf]. `rustc` arguments can also be specified
3064 in the `build.rustflags` configuration key.
3069 * [The time complexity of comparing variables for equivalence during type
3070 unification is reduced from _O_(_n_!) to _O_(_n_)][1.9tu]. This leads
3071 to major compilation time improvement in some scenarios.
3072 * [`ToString` is specialized for `str`, giving it the same performance
3073 as `to_owned`][1.9ts].
3074 * [Spawning processes with `Command::output` no longer creates extra
3076 * [`#[derive(PartialEq)]` and `#[derive(PartialOrd)]` emit less code
3077 for C-like enums][1.9cl].
3082 * [Passing the `--quiet` flag to a test runner will produce
3083 much-abbreviated output][1.9q].
3084 * The Rust Project now publishes std binaries for the
3085 `mips-unknown-linux-musl`, `mipsel-unknown-linux-musl`, and
3086 `i586-pc-windows-msvc` targets.
3091 * [`std::sync::Once` is poisoned if its initialization function
3093 * [It is illegal to define methods with the same name in overlapping
3094 inherent `impl` blocks][1.9sn].
3095 * [`fn` item types are zero sized, and each `fn` names a unique
3096 type][1.9fn]. This will break code that transmutes `fn`s, so calling
3097 `transmute` on a `fn` type will generate a warning for a few cycles,
3098 then will be converted to an error.
3099 * [Improvements to const evaluation may trigger new errors when integer
3100 literals are out of range][1.9ce].
3103 [1.9bf]: https://github.com/rust-lang/rust/pull/32695
3104 [1.9cc]: https://github.com/rust-lang/cargo/pull/2486
3105 [1.9ce]: https://github.com/rust-lang/rust/pull/30587
3106 [1.9cf]: https://github.com/rust-lang/cargo/pull/2241
3107 [1.9ch]: https://github.com/rust-lang/rust/pull/32541
3108 [1.9cl]: https://github.com/rust-lang/rust/pull/31977
3109 [1.9cp]: https://github.com/rust-lang/cargo/pull/2465
3110 [1.9ct]: https://github.com/rust-lang/cargo/pull/2385
3111 [1.9cu]: https://github.com/rust-lang/rust/pull/32652
3112 [1.9db]: https://github.com/rust-lang/rust/pull/32054
3113 [1.9fi]: https://github.com/rust-lang/rust/pull/32050
3114 [1.9fn]: https://github.com/rust-lang/rust/pull/31710
3115 [1.9fv]: https://github.com/rust-lang/rust/pull/31938
3116 [1.9hc]: https://github.com/rust-lang/rust/pull/32635
3117 [1.9o]: https://github.com/rust-lang/rust/pull/32325
3118 [1.9q]: https://github.com/rust-lang/rust/pull/31887
3119 [1.9sk]: https://github.com/rust-lang/rust/pull/31700
3120 [1.9sn]: https://github.com/rust-lang/rust/pull/31925
3121 [1.9sp]: https://github.com/rust-lang/rust/pull/31618
3122 [1.9ta]: https://github.com/rust-lang/rust/pull/32448
3123 [1.9ts]: https://github.com/rust-lang/rust/pull/32586
3124 [1.9tu]: https://github.com/rust-lang/rust/pull/32062
3125 [1.9ws]: https://github.com/rust-lang/rust/pull/29734
3126 [RFC 1270]: https://github.com/rust-lang/rfcs/blob/master/text/1270-deprecation.md
3127 [`<*const T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
3128 [`<*mut T>::as_mut`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_mut
3129 [`<*mut T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
3130 [`slice::copy_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.copy_from_slice
3131 [`AsciiExt::make_ascii_lowercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_lowercase
3132 [`AsciiExt::make_ascii_uppercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_uppercase
3133 [`BTreeSet::get`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.get
3134 [`BTreeSet::replace`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.replace
3135 [`BTreeSet::take`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.take
3136 [`CommandExt::exec`]: http://doc.rust-lang.org/nightly/std/os/unix/process/trait.CommandExt.html#tymethod.exec
3137 [`File::try_clone`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html#method.try_clone
3138 [`HashMap::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.hasher
3139 [`HashSet::get`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.get
3140 [`HashSet::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.hasher
3141 [`HashSet::replace`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.replace
3142 [`HashSet::take`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.take
3143 [`JoinHandleExt::as_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.as_pthread_t
3144 [`JoinHandleExt::into_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.into_pthread_t
3145 [`JoinHandleExt`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html
3146 [`OpenOptions::create_new`]: http://doc.rust-lang.org/nightly/std/fs/struct.OpenOptions.html#method.create_new
3147 [`OsStr::is_empty`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.is_empty
3148 [`OsStr::len`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.len
3149 [`OsString::capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.capacity
3150 [`OsString::clear`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.clear
3151 [`OsString::reserve_exact`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve_exact
3152 [`OsString::reserve`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve
3153 [`OsString::with_capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.with_capacity
3154 [`RawPthread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/type.RawPthread.html
3155 [`SocketAddr::set_ip`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_ip
3156 [`SocketAddr::set_port`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_port
3157 [`SocketAddrV4::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_ip
3158 [`SocketAddrV4::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_port
3159 [`SocketAddrV6::set_flowinfo`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_flowinfo
3160 [`SocketAddrV6::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_ip
3161 [`SocketAddrV6::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_port
3162 [`SocketAddrV6::set_scope_id`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_scope_id
3163 [`TcpListener::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
3164 [`TcpListener::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
3165 [`TcpListener::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
3166 [`TcpListener::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
3167 [`TcpListener::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
3168 [`TcpListener::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
3169 [`TcpStream::nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.nodelay
3170 [`TcpStream::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
3171 [`TcpStream::set_nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nodelay
3172 [`TcpStream::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
3173 [`TcpStream::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
3174 [`TcpStream::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
3175 [`TcpStream::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
3176 [`TcpStream::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
3177 [`UdpSocket::broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.broadcast
3178 [`UdpSocket::connect`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.connect
3179 [`UdpSocket::join_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v4
3180 [`UdpSocket::join_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v6
3181 [`UdpSocket::leave_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v4
3182 [`UdpSocket::leave_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v6
3183 [`UdpSocket::multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v4
3184 [`UdpSocket::multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v6
3185 [`UdpSocket::multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v4
3186 [`UdpSocket::multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v6
3187 [`UdpSocket::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.only_v6
3188 [`UdpSocket::recv`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.recv
3189 [`UdpSocket::send`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.send
3190 [`UdpSocket::set_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_broadcast
3191 [`UdpSocket::set_multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v4
3192 [`UdpSocket::set_multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v6
3193 [`UdpSocket::set_multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v4
3194 [`UdpSocket::set_multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v6
3195 [`UdpSocket::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_nonblocking
3196 [`UdpSocket::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_only_v6
3197 [`UdpSocket::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_ttl
3198 [`UdpSocket::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.take_error
3199 [`UdpSocket::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.ttl
3200 [`char::DecodeUtf16Error::unpaired_surrogate`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html#method.unpaired_surrogate
3201 [`char::DecodeUtf16Error`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html
3202 [`char::DecodeUtf16`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16.html
3203 [`char::decode_utf16`]: http://doc.rust-lang.org/nightly/std/char/fn.decode_utf16.html
3204 [`ptr::read_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.read_volatile.html
3205 [`ptr::write_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.write_volatile.html
3206 [`std::os::unix::thread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/index.html
3207 [`std::panic::AssertUnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/struct.AssertUnwindSafe.html
3208 [`std::panic::UnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/trait.UnwindSafe.html
3209 [`std::panic::catch_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.catch_unwind.html
3210 [`std::panic::resume_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.resume_unwind.html
3211 [`std::panic`]: http://doc.rust-lang.org/nightly/std/panic/index.html
3212 [`str::is_char_boundary`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.is_char_boundary
3215 Version 1.8.0 (2016-04-14)
3216 ==========================
3221 * Rust supports overloading of compound assignment statements like
3222 `+=` by implementing the [`AddAssign`], [`SubAssign`],
3223 [`MulAssign`], [`DivAssign`], [`RemAssign`], [`BitAndAssign`],
3224 [`BitOrAssign`], [`BitXorAssign`], [`ShlAssign`], or [`ShrAssign`]
3226 * Empty structs can be defined with braces, as in `struct Foo { }`, in
3227 addition to the non-braced form, `struct Foo;`. [RFC 218].
3233 * [`str::encode_utf16`][] (renamed from `utf16_units`)
3234 * [`str::EncodeUtf16`][] (renamed from `Utf16Units`)
3237 * [`ptr::drop_in_place`]
3239 * [`time::SystemTime`]
3241 * [`Instant::duration_since`][] (renamed from `duration_from_earlier`)
3242 * [`Instant::elapsed`]
3243 * [`SystemTime::now`]
3244 * [`SystemTime::duration_since`][] (renamed from `duration_from_earlier`)
3245 * [`SystemTime::elapsed`]
3246 * Various `Add`/`Sub` impls for `Time` and `SystemTime`
3247 * [`SystemTimeError`]
3248 * [`SystemTimeError::duration`]
3249 * Various impls for `SystemTimeError`
3251 * [`AddAssign`], [`SubAssign`], [`MulAssign`], [`DivAssign`],
3252 [`RemAssign`], [`BitAndAssign`], [`BitOrAssign`],
3253 [`BitXorAssign`], [`ShlAssign`], [`ShrAssign`].
3254 * [The `write!` and `writeln!` macros correctly emit errors if any of
3255 their arguments can't be formatted][1.8w].
3256 * [Various I/O functions support large files on 32-bit Linux][1.8l].
3257 * [The Unix-specific `raw` modules, which contain a number of
3258 redefined C types are deprecated][1.8r], including `os::raw::unix`,
3259 `os::raw::macos`, and `os::raw::linux`. These modules defined types
3260 such as `ino_t` and `dev_t`. The inconsistency of these definitions
3261 across platforms was making it difficult to implement `std`
3262 correctly. Those that need these definitions should use the `libc`
3264 * The Unix-specific `MetadataExt` traits, including
3265 `os::unix::fs::MetadataExt`, which expose values such as inode
3266 numbers [no longer return platform-specific types][1.8r], but
3267 instead return widened integers. [RFC 1415].
3268 * [`btree_set::{IntoIter, Iter, Range}` are covariant][1.8cv].
3269 * [Atomic loads and stores are not volatile][1.8a].
3270 * [All types in `sync::mpsc` implement `fmt::Debug`][1.8mp].
3275 * [Inlining hash functions lead to a 3% compile-time improvement in
3276 some workloads][1.8h].
3277 * When using jemalloc, its symbols are [unprefixed so that it
3278 overrides the libc malloc implementation][1.8h]. This means that for
3279 rustc, LLVM is now using jemalloc, which results in a 6%
3280 compile-time improvement on a specific workload.
3281 * [Avoid quadratic growth in function size due to cleanups][1.8cu].
3286 * [32-bit MSVC builds finally implement unwinding][1.8ms].
3287 i686-pc-windows-msvc is now considered a tier-1 platform.
3288 * [The `--print targets` flag prints a list of supported targets][1.8t].
3289 * [The `--print cfg` flag prints the `cfg`s defined for the current
3291 * [`rustc` can be built with an new Cargo-based build system, written
3292 in Rust][1.8b]. It will eventually replace Rust's Makefile-based
3293 build system. To enable it configure with `configure --rustbuild`.
3294 * [Errors for non-exhaustive `match` patterns now list up to 3 missing
3295 variants while also indicating the total number of missing variants
3296 if more than 3][1.8m].
3297 * [Executable stacks are disabled on Linux and BSD][1.8nx].
3298 * The Rust Project now publishes binary releases of the standard
3299 library for a number of tier-2 targets:
3300 `armv7-unknown-linux-gnueabihf`, `powerpc-unknown-linux-gnu`,
3301 `powerpc64-unknown-linux-gnu`, `powerpc64le-unknown-linux-gnu`
3302 `x86_64-rumprun-netbsd`. These can be installed with
3303 tools such as [multirust][1.8mr].
3308 * [`cargo init` creates a new Cargo project in the current
3309 directory][1.8ci]. It is otherwise like `cargo new`.
3310 * [Cargo has configuration keys for `-v` and
3311 `--color`][1.8cc]. `verbose` and `color`, respectively, go in the
3312 `[term]` section of `.cargo/config`.
3313 * [Configuration keys that evaluate to strings or integers can be set
3314 via environment variables][1.8ce]. For example the `build.jobs` key
3315 can be set via `CARGO_BUILD_JOBS`. Environment variables take
3316 precedence over config files.
3317 * [Target-specific dependencies support Rust `cfg` syntax for
3318 describing targets][1.8cfg] so that dependencies for multiple
3319 targets can be specified together. [RFC 1361].
3320 * [The environment variables `CARGO_TARGET_ROOT`, `RUSTC`, and
3321 `RUSTDOC` take precedence over the `build.target-dir`,
3322 `build.rustc`, and `build.rustdoc` configuration values][1.8cv].
3323 * [The child process tree is killed on Windows when Cargo is
3325 * [The `build.target` configuration value sets the target platform,
3326 like `--target`][1.8ct].
3331 * [Unstable compiler flags have been further restricted][1.8u]. Since
3332 1.0 `-Z` flags have been considered unstable, and other flags that
3333 were considered unstable additionally required passing `-Z
3334 unstable-options` to access. Unlike unstable language and library
3335 features though, these options have been accessible on the stable
3336 release channel. Going forward, *new unstable flags will not be
3337 available on the stable release channel*, and old unstable flags
3338 will warn about their usage. In the future, all unstable flags will
3339 be unavailable on the stable release channel.
3340 * [It is no longer possible to `match` on empty enum variants using
3341 the `Variant(..)` syntax][1.8v]. This has been a warning since 1.6.
3342 * The Unix-specific `MetadataExt` traits, including
3343 `os::unix::fs::MetadataExt`, which expose values such as inode
3344 numbers [no longer return platform-specific types][1.8r], but
3345 instead return widened integers. [RFC 1415].
3346 * [Modules sourced from the filesystem cannot appear within arbitrary
3347 blocks, but only within other modules][1.8mf].
3348 * [`--cfg` compiler flags are parsed strictly as identifiers][1.8c].
3349 * On Unix, [stack overflow triggers a runtime abort instead of a
3351 * [`Command::spawn` and its equivalents return an error if any of
3352 its command-line arguments contain interior `NUL`s][1.8n].
3353 * [Tuple and unit enum variants from other crates are in the type
3355 * [On Windows `rustc` emits `.lib` files for the `staticlib` library
3356 type instead of `.a` files][1.8st]. Additionally, for the MSVC
3357 toolchain, `rustc` emits import libraries named `foo.dll.lib`
3358 instead of `foo.lib`.
3361 [1.8a]: https://github.com/rust-lang/rust/pull/30962
3362 [1.8b]: https://github.com/rust-lang/rust/pull/31123
3363 [1.8c]: https://github.com/rust-lang/rust/pull/31530
3364 [1.8cc]: https://github.com/rust-lang/cargo/pull/2397
3365 [1.8ce]: https://github.com/rust-lang/cargo/pull/2398
3366 [1.8cf]: https://github.com/rust-lang/rust/pull/31278
3367 [1.8cfg]: https://github.com/rust-lang/cargo/pull/2328
3368 [1.8ci]: https://github.com/rust-lang/cargo/pull/2081
3369 [1.8ck]: https://github.com/rust-lang/cargo/pull/2370
3370 [1.8ct]: https://github.com/rust-lang/cargo/pull/2335
3371 [1.8cu]: https://github.com/rust-lang/rust/pull/31390
3372 [1.8cv]: https://github.com/rust-lang/cargo/issues/2365
3373 [1.8cv]: https://github.com/rust-lang/rust/pull/30998
3374 [1.8h]: https://github.com/rust-lang/rust/pull/31460
3375 [1.8l]: https://github.com/rust-lang/rust/pull/31668
3376 [1.8m]: https://github.com/rust-lang/rust/pull/31020
3377 [1.8mf]: https://github.com/rust-lang/rust/pull/31534
3378 [1.8mp]: https://github.com/rust-lang/rust/pull/30894
3379 [1.8mr]: https://users.rust-lang.org/t/multirust-0-8-with-cross-std-installation/4901
3380 [1.8ms]: https://github.com/rust-lang/rust/pull/30448
3381 [1.8n]: https://github.com/rust-lang/rust/pull/31056
3382 [1.8nx]: https://github.com/rust-lang/rust/pull/30859
3383 [1.8r]: https://github.com/rust-lang/rust/pull/31551
3384 [1.8so]: https://github.com/rust-lang/rust/pull/31333
3385 [1.8st]: https://github.com/rust-lang/rust/pull/29520
3386 [1.8t]: https://github.com/rust-lang/rust/pull/31358
3387 [1.8tn]: https://github.com/rust-lang/rust/pull/30882
3388 [1.8u]: https://github.com/rust-lang/rust/pull/31793
3389 [1.8v]: https://github.com/rust-lang/rust/pull/31757
3390 [1.8w]: https://github.com/rust-lang/rust/pull/31904
3391 [RFC 1361]: https://github.com/rust-lang/rfcs/blob/master/text/1361-cargo-cfg-dependencies.md
3392 [RFC 1415]: https://github.com/rust-lang/rfcs/blob/master/text/1415-trim-std-os.md
3393 [RFC 218]: https://github.com/rust-lang/rfcs/blob/master/text/0218-empty-struct-with-braces.md
3394 [RFC 953]: https://github.com/rust-lang/rfcs/blob/master/text/0953-op-assign.md
3395 [`AddAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.AddAssign.html
3396 [`BitAndAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitAndAssign.html
3397 [`BitOrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitOrAssign.html
3398 [`BitXorAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitXorAssign.html
3399 [`DivAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.DivAssign.html
3400 [`Instant::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.duration_since
3401 [`Instant::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.elapsed
3402 [`Instant::now`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.now
3403 [`MulAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.MulAssign.html
3404 [`Ref::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.Ref.html#method.map
3405 [`RefMut::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.RefMut.html#method.map
3406 [`RemAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.RemAssign.html
3407 [`ShlAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShlAssign.html
3408 [`ShrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShrAssign.html
3409 [`SubAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.SubAssign.html
3410 [`SystemTime::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.duration_since
3411 [`SystemTime::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.elapsed
3412 [`SystemTime::now`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.now
3413 [`SystemTimeError::duration`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html#method.duration
3414 [`SystemTimeError`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html
3415 [`UNIX_EPOCH`]: http://doc.rust-lang.org/nightly/std/time/constant.UNIX_EPOCH.html
3416 [`ptr::drop_in_place`]: http://doc.rust-lang.org/nightly/std/ptr/fn.drop_in_place.html
3417 [`str::EncodeUtf16`]: http://doc.rust-lang.org/nightly/std/str/struct.EncodeUtf16.html
3418 [`str::encode_utf16`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.encode_utf16
3419 [`time::Instant`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html
3420 [`time::SystemTime`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html
3423 Version 1.7.0 (2016-03-03)
3424 ==========================
3431 * [`Path::strip_prefix`][] (renamed from relative_from)
3432 * [`path::StripPrefixError`][] (new error type returned from strip_prefix)
3434 * [`Ipv4Addr::is_loopback`]
3435 * [`Ipv4Addr::is_private`]
3436 * [`Ipv4Addr::is_link_local`]
3437 * [`Ipv4Addr::is_multicast`]
3438 * [`Ipv4Addr::is_broadcast`]
3439 * [`Ipv4Addr::is_documentation`]
3441 * [`Ipv6Addr::is_unspecified`]
3442 * [`Ipv6Addr::is_loopback`]
3443 * [`Ipv6Addr::is_multicast`]
3446 * [`Vec::as_mut_slice`]
3448 * [`String::as_str`]
3449 * [`String::as_mut_str`]
3451 * `<[T]>::`[`clone_from_slice`], which now requires the two slices to
3453 * `<[T]>::`[`sort_by_key`]
3454 * checked, saturated, and overflowing operations
3455 * [`i32::checked_rem`], [`i32::checked_neg`], [`i32::checked_shl`], [`i32::checked_shr`]
3456 * [`i32::saturating_mul`]
3457 * [`i32::overflowing_add`], [`i32::overflowing_sub`], [`i32::overflowing_mul`], [`i32::overflowing_div`]
3458 * [`i32::overflowing_rem`], [`i32::overflowing_neg`], [`i32::overflowing_shl`], [`i32::overflowing_shr`]
3459 * [`u32::checked_rem`], [`u32::checked_neg`], [`u32::checked_shl`], [`u32::checked_shl`]
3460 * [`u32::saturating_mul`]
3461 * [`u32::overflowing_add`], [`u32::overflowing_sub`], [`u32::overflowing_mul`], [`u32::overflowing_div`]
3462 * [`u32::overflowing_rem`], [`u32::overflowing_neg`], [`u32::overflowing_shl`], [`u32::overflowing_shr`]
3463 * and checked, saturated, and overflowing operations for other primitive types
3465 * [`ffi::IntoStringError`]
3466 * [`CString::into_string`]
3467 * [`CString::into_bytes`]
3468 * [`CString::into_bytes_with_nul`]
3469 * `From<CString> for Vec<u8>`
3471 * [`IntoStringError::into_cstring`]
3472 * [`IntoStringError::utf8_error`]
3473 * `Error for IntoStringError`
3475 * [`std::hash::BuildHasher`]
3476 * [`BuildHasher::Hasher`]
3477 * [`BuildHasher::build_hasher`]
3478 * [`std::hash::BuildHasherDefault`]
3479 * [`HashMap::with_hasher`]
3480 * [`HashMap::with_capacity_and_hasher`]
3481 * [`HashSet::with_hasher`]
3482 * [`HashSet::with_capacity_and_hasher`]
3483 * [`std::collections::hash_map::RandomState`]
3484 * [`RandomState::new`]
3485 * [Validating UTF-8 is faster by a factor of between 7 and 14x for
3486 ASCII input][1.7utf8]. This means that creating `String`s and `str`s
3487 from bytes is faster.
3488 * [The performance of `LineWriter` (and thus `io::stdout`) was
3489 improved by using `memchr` to search for newlines][1.7m].
3490 * [`f32::to_degrees` and `f32::to_radians` are stable][1.7f]. The
3491 `f64` variants were stabilized previously.
3492 * [`BTreeMap` was rewritten to use less memory and improve the performance
3493 of insertion and iteration, the latter by as much as 5x][1.7bm].
3494 * [`BTreeSet` and its iterators, `Iter`, `IntoIter`, and `Range` are
3495 covariant over their contained type][1.7bt].
3496 * [`LinkedList` and its iterators, `Iter` and `IntoIter` are covariant
3497 over their contained type][1.7ll].
3498 * [`str::replace` now accepts a `Pattern`][1.7rp], like other string
3500 * [`Any` is implemented for unsized types][1.7a].
3501 * [`Hash` is implemented for `Duration`][1.7h].
3506 * [When running tests with `--test`, rustdoc will pass `--cfg`
3507 arguments to the compiler][1.7dt].
3508 * [The compiler is built with RPATH information by default][1.7rpa].
3509 This means that it will be possible to run `rustc` when installed in
3510 unusual configurations without configuring the dynamic linker search
3512 * [`rustc` passes `--enable-new-dtags` to GNU ld][1.7dta]. This makes
3513 any RPATH entries (emitted with `-C rpath`) *not* take precedence
3514 over `LD_LIBRARY_PATH`.
3519 * [`cargo rustc` accepts a `--profile` flag that runs `rustc` under
3520 any of the compilation profiles, 'dev', 'bench', or 'test'][1.7cp].
3521 * [The `rerun-if-changed` build script directive no longer causes the
3522 build script to incorrectly run twice in certain scenarios][1.7rr].
3527 * Soundness fixes to the interactions between associated types and
3528 lifetimes, specified in [RFC 1214], [now generate errors][1.7sf] for
3529 code that violates the new rules. This is a significant change that
3530 is known to break existing code, so it has emitted warnings for the
3531 new error cases since 1.4 to give crate authors time to adapt. The
3532 details of what is changing are subtle; read the RFC for more.
3533 * [Several bugs in the compiler's visibility calculations were
3534 fixed][1.7v]. Since this was found to break significant amounts of
3535 code, the new errors will be emitted as warnings for several release
3536 cycles, under the `private_in_public` lint.
3537 * Defaulted type parameters were accidentally accepted in positions
3538 that were not intended. In this release, [defaulted type parameters
3539 appearing outside of type definitions will generate a
3540 warning][1.7d], which will become an error in future releases.
3541 * [Parsing "." as a float results in an error instead of 0][1.7p].
3542 That is, `".".parse::<f32>()` returns `Err`, not `Ok(0.0)`.
3543 * [Borrows of closure parameters may not outlive the closure][1.7bc].
3545 [1.7a]: https://github.com/rust-lang/rust/pull/30928
3546 [1.7bc]: https://github.com/rust-lang/rust/pull/30341
3547 [1.7bm]: https://github.com/rust-lang/rust/pull/30426
3548 [1.7bt]: https://github.com/rust-lang/rust/pull/30998
3549 [1.7cp]: https://github.com/rust-lang/cargo/pull/2224
3550 [1.7d]: https://github.com/rust-lang/rust/pull/30724
3551 [1.7dt]: https://github.com/rust-lang/rust/pull/30372
3552 [1.7dta]: https://github.com/rust-lang/rust/pull/30394
3553 [1.7f]: https://github.com/rust-lang/rust/pull/30672
3554 [1.7h]: https://github.com/rust-lang/rust/pull/30818
3555 [1.7ll]: https://github.com/rust-lang/rust/pull/30663
3556 [1.7m]: https://github.com/rust-lang/rust/pull/30381
3557 [1.7p]: https://github.com/rust-lang/rust/pull/30681
3558 [1.7rp]: https://github.com/rust-lang/rust/pull/29498
3559 [1.7rpa]: https://github.com/rust-lang/rust/pull/30353
3560 [1.7rr]: https://github.com/rust-lang/cargo/pull/2279
3561 [1.7sf]: https://github.com/rust-lang/rust/pull/30389
3562 [1.7utf8]: https://github.com/rust-lang/rust/pull/30740
3563 [1.7v]: https://github.com/rust-lang/rust/pull/29973
3564 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
3565 [`BuildHasher::Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
3566 [`BuildHasher::build_hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html#tymethod.build_hasher
3567 [`CString::into_bytes_with_nul`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes_with_nul
3568 [`CString::into_bytes`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes
3569 [`CString::into_string`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_string
3570 [`HashMap::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_capacity_and_hasher
3571 [`HashMap::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_hasher
3572 [`HashSet::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_capacity_and_hasher
3573 [`HashSet::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_hasher
3574 [`IntoStringError::into_cstring`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.into_cstring
3575 [`IntoStringError::utf8_error`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.utf8_error
3576 [`Ipv4Addr::is_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_broadcast
3577 [`Ipv4Addr::is_documentation`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_documentation
3578 [`Ipv4Addr::is_link_local`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_link_local
3579 [`Ipv4Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_loopback
3580 [`Ipv4Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_multicast
3581 [`Ipv4Addr::is_private`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_private
3582 [`Ipv6Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_loopback
3583 [`Ipv6Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_multicast
3584 [`Ipv6Addr::is_unspecified`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_unspecified
3585 [`Path::strip_prefix`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.strip_prefix
3586 [`RandomState::new`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html#method.new
3587 [`String::as_mut_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_mut_str
3588 [`String::as_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_str
3589 [`Vec::as_mut_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_mut_slice
3590 [`Vec::as_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_slice
3591 [`clone_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.clone_from_slice
3592 [`ffi::IntoStringError`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html
3593 [`i32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_neg
3594 [`i32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_rem
3595 [`i32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shl
3596 [`i32::checked_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shr
3597 [`i32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_add
3598 [`i32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_div
3599 [`i32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_mul
3600 [`i32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_neg
3601 [`i32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_rem
3602 [`i32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shl
3603 [`i32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shr
3604 [`i32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_sub
3605 [`i32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.saturating_mul
3606 [`path::StripPrefixError`]: http://doc.rust-lang.org/nightly/std/path/struct.StripPrefixError.html
3607 [`sort_by_key`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.sort_by_key
3608 [`std::collections::hash_map::RandomState`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html
3609 [`std::hash::BuildHasherDefault`]: http://doc.rust-lang.org/nightly/std/hash/struct.BuildHasherDefault.html
3610 [`std::hash::BuildHasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html
3611 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
3612 [`u32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_rem
3613 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
3614 [`u32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_shl
3615 [`u32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_add
3616 [`u32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_div
3617 [`u32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_mul
3618 [`u32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_neg
3619 [`u32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_rem
3620 [`u32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shl
3621 [`u32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shr
3622 [`u32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_sub
3623 [`u32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.saturating_mul
3626 Version 1.6.0 (2016-01-21)
3627 ==========================
3632 * The `#![no_std]` attribute causes a crate to not be linked to the
3633 standard library, but only the [core library][1.6co], as described
3634 in [RFC 1184]. The core library defines common types and traits but
3635 has no platform dependencies whatsoever, and is the basis for Rust
3636 software in environments that cannot support a full port of the
3637 standard library, such as operating systems. Most of the core
3638 library is now stable.
3644 [`Read::read_exact`],
3645 [`ErrorKind::UnexpectedEof`][] (renamed from `UnexpectedEOF`),
3646 [`fs::DirBuilder`], [`fs::DirBuilder::new`],
3647 [`fs::DirBuilder::recursive`], [`fs::DirBuilder::create`],
3648 [`os::unix::fs::DirBuilderExt`],
3649 [`os::unix::fs::DirBuilderExt::mode`], [`vec::Drain`],
3650 [`vec::Vec::drain`], [`string::Drain`], [`string::String::drain`],
3651 [`vec_deque::Drain`], [`vec_deque::VecDeque::drain`],
3652 [`collections::hash_map::Drain`],
3653 [`collections::hash_map::HashMap::drain`],
3654 [`collections::hash_set::Drain`],
3655 [`collections::hash_set::HashSet::drain`],
3656 [`collections::binary_heap::Drain`],
3657 [`collections::binary_heap::BinaryHeap::drain`],
3658 [`Vec::extend_from_slice`][] (renamed from `push_all`),
3659 [`Mutex::get_mut`], [`Mutex::into_inner`], [`RwLock::get_mut`],
3660 [`RwLock::into_inner`],
3661 [`Iterator::min_by_key`][] (renamed from `min_by`),
3662 [`Iterator::max_by_key`][] (renamed from `max_by`).
3663 * The [core library][1.6co] is stable, as are most of its APIs.
3664 * [The `assert_eq!` macro supports arguments that don't implement
3665 `Sized`][1.6ae], such as arrays. In this way it behaves more like
3667 * Several timer functions that take duration in milliseconds [are
3668 deprecated in favor of those that take `Duration`][1.6ms]. These
3669 include `Condvar::wait_timeout_ms`, `thread::sleep_ms`, and
3670 `thread::park_timeout_ms`.
3671 * The algorithm by which `Vec` reserves additional elements was
3672 [tweaked to not allocate excessive space][1.6a] while still growing
3674 * `From` conversions are [implemented from integers to floats][1.6f]
3675 in cases where the conversion is lossless. Thus they are not
3676 implemented for 32-bit ints to `f32`, nor for 64-bit ints to `f32`
3677 or `f64`. They are also not implemented for `isize` and `usize`
3678 because the implementations would be platform-specific. `From` is
3679 also implemented from `f32` to `f64`.
3680 * `From<&Path>` and `From<PathBuf>` are implemented for `Cow<Path>`.
3681 * `From<T>` is implemented for `Box<T>`, `Rc<T>` and `Arc<T>`.
3682 * `IntoIterator` is implemented for `&PathBuf` and `&Path`.
3683 * [`BinaryHeap` was refactored][1.6bh] for modest performance
3685 * Sorting slices that are already sorted [is 50% faster in some
3691 * Cargo will look in `$CARGO_HOME/bin` for subcommands [by default][1.6c].
3692 * Cargo build scripts can specify their dependencies by emitting the
3693 [`rerun-if-changed`][1.6rr] key.
3694 * crates.io will reject publication of crates with dependencies that
3695 have a wildcard version constraint. Crates with wildcard
3696 dependencies were seen to cause a variety of problems, as described
3697 in [RFC 1241]. Since 1.5 publication of such crates has emitted a
3699 * `cargo clean` [accepts a `--release` flag][1.6cc] to clean the
3700 release folder. A variety of artifacts that Cargo failed to clean
3701 are now correctly deleted.
3706 * The `unreachable_code` lint [warns when a function call's argument
3708 * The parser indicates [failures that may be caused by
3709 confusingly-similar Unicode characters][1.6uc]
3710 * Certain macro errors [are reported at definition time][1.6m], not
3716 * The compiler no longer makes use of the [`RUST_PATH`][1.6rp]
3717 environment variable when locating crates. This was a pre-cargo
3718 feature for integrating with the package manager that was
3719 accidentally never removed.
3720 * [A number of bugs were fixed in the privacy checker][1.6p] that
3721 could cause previously-accepted code to break.
3722 * [Modules and unit/tuple structs may not share the same name][1.6ts].
3723 * [Bugs in pattern matching unit structs were fixed][1.6us]. The tuple
3724 struct pattern syntax (`Foo(..)`) can no longer be used to match
3725 unit structs. This is a warning now, but will become an error in
3726 future releases. Patterns that share the same name as a const are
3728 * A bug was fixed that causes [rustc not to apply default type
3729 parameters][1.6xc] when resolving certain method implementations of
3730 traits defined in other crates.
3732 [1.6a]: https://github.com/rust-lang/rust/pull/29454
3733 [1.6ae]: https://github.com/rust-lang/rust/pull/29770
3734 [1.6bh]: https://github.com/rust-lang/rust/pull/29811
3735 [1.6c]: https://github.com/rust-lang/cargo/pull/2192
3736 [1.6cc]: https://github.com/rust-lang/cargo/pull/2131
3737 [1.6co]: http://doc.rust-lang.org/beta/core/index.html
3738 [1.6dv]: https://github.com/rust-lang/rust/pull/30000
3739 [1.6f]: https://github.com/rust-lang/rust/pull/29129
3740 [1.6m]: https://github.com/rust-lang/rust/pull/29828
3741 [1.6ms]: https://github.com/rust-lang/rust/pull/29604
3742 [1.6p]: https://github.com/rust-lang/rust/pull/29726
3743 [1.6rp]: https://github.com/rust-lang/rust/pull/30034
3744 [1.6rr]: https://github.com/rust-lang/cargo/pull/2134
3745 [1.6s]: https://github.com/rust-lang/rust/pull/29675
3746 [1.6ts]: https://github.com/rust-lang/rust/issues/21546
3747 [1.6uc]: https://github.com/rust-lang/rust/pull/29837
3748 [1.6us]: https://github.com/rust-lang/rust/pull/29383
3749 [1.6xc]: https://github.com/rust-lang/rust/issues/30123
3750 [RFC 1184]: https://github.com/rust-lang/rfcs/blob/master/text/1184-stabilize-no_std.md
3751 [RFC 1241]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
3752 [`ErrorKind::UnexpectedEof`]: http://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html#variant.UnexpectedEof
3753 [`Iterator::max_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.max_by_key
3754 [`Iterator::min_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.min_by_key
3755 [`Mutex::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.get_mut
3756 [`Mutex::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.into_inner
3757 [`Read::read_exact`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_exact
3758 [`RwLock::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.get_mut
3759 [`RwLock::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.into_inner
3760 [`Vec::extend_from_slice`]: http://doc.rust-lang.org/nightly/collections/vec/struct.Vec.html#method.extend_from_slice
3761 [`collections::binary_heap::BinaryHeap::drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.BinaryHeap.html#method.drain
3762 [`collections::binary_heap::Drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.Drain.html
3763 [`collections::hash_map::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.Drain.html
3764 [`collections::hash_map::HashMap::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.HashMap.html#method.drain
3765 [`collections::hash_set::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.Drain.html
3766 [`collections::hash_set::HashSet::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.HashSet.html#method.drain
3767 [`fs::DirBuilder::create`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.create
3768 [`fs::DirBuilder::new`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.new
3769 [`fs::DirBuilder::recursive`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.recursive
3770 [`fs::DirBuilder`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html
3771 [`os::unix::fs::DirBuilderExt::mode`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html#tymethod.mode
3772 [`os::unix::fs::DirBuilderExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html
3773 [`string::Drain`]: http://doc.rust-lang.org/nightly/std/string/struct.Drain.html
3774 [`string::String::drain`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.drain
3775 [`vec::Drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Drain.html
3776 [`vec::Vec::drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.drain
3777 [`vec_deque::Drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.Drain.html
3778 [`vec_deque::VecDeque::drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.VecDeque.html#method.drain
3781 Version 1.5.0 (2015-12-10)
3782 ==========================
3784 * ~700 changes, numerous bugfixes
3790 [`BinaryHeap::from`], [`BinaryHeap::into_sorted_vec`],
3791 [`BinaryHeap::into_vec`], [`Condvar::wait_timeout`],
3792 [`FileTypeExt::is_block_device`], [`FileTypeExt::is_char_device`],
3793 [`FileTypeExt::is_fifo`], [`FileTypeExt::is_socket`],
3794 [`FileTypeExt`], [`Formatter::alternate`], [`Formatter::fill`],
3795 [`Formatter::precision`], [`Formatter::sign_aware_zero_pad`],
3796 [`Formatter::sign_minus`], [`Formatter::sign_plus`],
3797 [`Formatter::width`], [`Iterator::cmp`], [`Iterator::eq`],
3798 [`Iterator::ge`], [`Iterator::gt`], [`Iterator::le`],
3799 [`Iterator::lt`], [`Iterator::ne`], [`Iterator::partial_cmp`],
3800 [`Path::canonicalize`], [`Path::exists`], [`Path::is_dir`],
3801 [`Path::is_file`], [`Path::metadata`], [`Path::read_dir`],
3802 [`Path::read_link`], [`Path::symlink_metadata`],
3803 [`Utf8Error::valid_up_to`], [`Vec::resize`],
3804 [`VecDeque::as_mut_slices`], [`VecDeque::as_slices`],
3805 [`VecDeque::insert`], [`VecDeque::shrink_to_fit`],
3806 [`VecDeque::swap_remove_back`], [`VecDeque::swap_remove_front`],
3807 [`slice::split_first_mut`], [`slice::split_first`],
3808 [`slice::split_last_mut`], [`slice::split_last`],
3809 [`char::from_u32_unchecked`], [`fs::canonicalize`],
3810 [`str::MatchIndices`], [`str::RMatchIndices`],
3811 [`str::match_indices`], [`str::rmatch_indices`],
3812 [`str::slice_mut_unchecked`], [`string::ParseError`].
3813 * Rust applications hosted on crates.io can be installed locally to
3814 `~/.cargo/bin` with the [`cargo install`] command. Among other
3815 things this makes it easier to augment Cargo with new subcommands:
3816 when a binary named e.g. `cargo-foo` is found in `$PATH` it can be
3817 invoked as `cargo foo`.
3818 * Crates with wildcard (`*`) dependencies will [emit warnings when
3819 published][1.5w]. In 1.6 it will no longer be possible to publish
3820 crates with wildcard dependencies.
3825 * The rules determining when a particular lifetime must outlive
3826 a particular value (known as '[dropck]') have been [modified
3827 to not rely on parametricity][1.5p].
3828 * [Implementations of `AsRef` and `AsMut` were added to `Box`, `Rc`,
3829 and `Arc`][1.5a]. Because these smart pointer types implement
3830 `Deref`, this causes breakage in cases where the interior type
3831 contains methods of the same name.
3832 * [Correct a bug in Rc/Arc][1.5c] that caused [dropck] to be unaware
3833 that they could drop their content. Soundness fix.
3834 * All method invocations are [properly checked][1.5wf1] for
3835 [well-formedness][1.5wf2]. Soundness fix.
3836 * Traits whose supertraits contain `Self` are [not object
3837 safe][1.5o]. Soundness fix.
3838 * Target specifications support a [`no_default_libraries`][1.5nd]
3839 setting that controls whether `-nodefaultlibs` is passed to the
3840 linker, and in turn the `is_like_windows` setting no longer affects
3841 the `-nodefaultlibs` flag.
3842 * `#[derive(Show)]`, long-deprecated, [has been removed][1.5ds].
3843 * The `#[inline]` and `#[repr]` attributes [can only appear
3844 in valid locations][1.5at].
3845 * Native libraries linked from the local crate are [passed to
3846 the linker before native libraries from upstream crates][1.5nl].
3847 * Two rarely-used attributes, `#[no_debug]` and
3848 `#[omit_gdb_pretty_printer_section]` [are feature gated][1.5fg].
3849 * Negation of unsigned integers, which has been a warning for
3850 several releases, [is now behind a feature gate and will
3851 generate errors][1.5nu].
3852 * The parser accidentally accepted visibility modifiers on
3853 enum variants, a bug [which has been fixed][1.5ev].
3854 * [A bug was fixed that allowed `use` statements to import unstable
3860 * When evaluating expressions at compile-time that are not
3861 compile-time constants (const-evaluating expressions in non-const
3862 contexts), incorrect code such as overlong bitshifts and arithmetic
3863 overflow will [generate a warning instead of an error][1.5ce],
3864 delaying the error until runtime. This will allow the
3865 const-evaluator to be expanded in the future backwards-compatibly.
3866 * The `improper_ctypes` lint [no longer warns about using `isize` and
3867 `usize` in FFI][1.5ict].
3872 * `Arc<T>` and `Rc<T>` are [covariant with respect to `T` instead of
3874 * `Default` is [implemented for mutable slices][1.5d].
3875 * `FromStr` is [implemented for `SockAddrV4` and `SockAddrV6`][1.5s].
3876 * There are now `From` conversions [between floating point
3877 types][1.5f] where the conversions are lossless.
3878 * There are now `From` conversions [between integer types][1.5i] where
3879 the conversions are lossless.
3880 * [`fs::Metadata` implements `Clone`][1.5fs].
3881 * The `parse` method [accepts a leading "+" when parsing
3883 * [`AsMut` is implemented for `Vec`][1.5am].
3884 * The `clone_from` implementations for `String` and `BinaryHeap` [have
3885 been optimized][1.5cf] and no longer rely on the default impl.
3886 * The `extern "Rust"`, `extern "C"`, `unsafe extern "Rust"` and
3887 `unsafe extern "C"` function types now [implement `Clone`,
3888 `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and
3889 `fmt::Debug` for up to 12 arguments][1.5fp].
3890 * [Dropping `Vec`s is much faster in unoptimized builds when the
3891 element types don't implement `Drop`][1.5dv].
3892 * A bug that caused in incorrect behavior when [combining `VecDeque`
3893 with zero-sized types][1.5vdz] was resolved.
3894 * [`PartialOrd` for slices is faster][1.5po].
3899 * [Crate metadata size was reduced by 20%][1.5md].
3900 * [Improvements to code generation reduced the size of libcore by 3.3
3901 MB and rustc's memory usage by 18MB][1.5m].
3902 * [Improvements to deref translation increased performance in
3903 unoptimized builds][1.5dr].
3904 * Various errors in trait resolution [are deduplicated to only be
3905 reported once][1.5te].
3906 * Rust has preliminary [support for rumprun kernels][1.5rr].
3907 * Rust has preliminary [support for NetBSD on amd64][1.5na].
3909 [1.5use]: https://github.com/rust-lang/rust/pull/28364
3910 [1.5po]: https://github.com/rust-lang/rust/pull/28436
3911 [1.5ev]: https://github.com/rust-lang/rust/pull/28442
3912 [1.5nu]: https://github.com/rust-lang/rust/pull/28468
3913 [1.5dr]: https://github.com/rust-lang/rust/pull/28491
3914 [1.5vdz]: https://github.com/rust-lang/rust/pull/28494
3915 [1.5md]: https://github.com/rust-lang/rust/pull/28521
3916 [1.5fg]: https://github.com/rust-lang/rust/pull/28522
3917 [1.5dv]: https://github.com/rust-lang/rust/pull/28531
3918 [1.5na]: https://github.com/rust-lang/rust/pull/28543
3919 [1.5fp]: https://github.com/rust-lang/rust/pull/28560
3920 [1.5rr]: https://github.com/rust-lang/rust/pull/28593
3921 [1.5cf]: https://github.com/rust-lang/rust/pull/28602
3922 [1.5nl]: https://github.com/rust-lang/rust/pull/28605
3923 [1.5te]: https://github.com/rust-lang/rust/pull/28645
3924 [1.5at]: https://github.com/rust-lang/rust/pull/28650
3925 [1.5am]: https://github.com/rust-lang/rust/pull/28663
3926 [1.5m]: https://github.com/rust-lang/rust/pull/28778
3927 [1.5ict]: https://github.com/rust-lang/rust/pull/28779
3928 [1.5a]: https://github.com/rust-lang/rust/pull/28811
3929 [1.5pi]: https://github.com/rust-lang/rust/pull/28826
3930 [1.5ce]: https://github.com/rust-lang/rfcs/blob/master/text/1229-compile-time-asserts.md
3931 [1.5p]: https://github.com/rust-lang/rfcs/blob/master/text/1238-nonparametric-dropck.md
3932 [1.5i]: https://github.com/rust-lang/rust/pull/28921
3933 [1.5fs]: https://github.com/rust-lang/rust/pull/29021
3934 [1.5f]: https://github.com/rust-lang/rust/pull/29129
3935 [1.5ds]: https://github.com/rust-lang/rust/pull/29148
3936 [1.5s]: https://github.com/rust-lang/rust/pull/29190
3937 [1.5d]: https://github.com/rust-lang/rust/pull/29245
3938 [1.5o]: https://github.com/rust-lang/rust/pull/29259
3939 [1.5nd]: https://github.com/rust-lang/rust/pull/28578
3940 [1.5wf2]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
3941 [1.5wf1]: https://github.com/rust-lang/rust/pull/28669
3942 [dropck]: https://doc.rust-lang.org/nightly/nomicon/dropck.html
3943 [1.5c]: https://github.com/rust-lang/rust/pull/29110
3944 [1.5w]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
3945 [`cargo install`]: https://github.com/rust-lang/rfcs/blob/master/text/1200-cargo-install.md
3946 [`BinaryHeap::from`]: http://doc.rust-lang.org/nightly/std/convert/trait.From.html#method.from
3947 [`BinaryHeap::into_sorted_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_sorted_vec
3948 [`BinaryHeap::into_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_vec
3949 [`Condvar::wait_timeout`]: http://doc.rust-lang.org/nightly/std/sync/struct.Condvar.html#method.wait_timeout
3950 [`FileTypeExt::is_block_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_block_device
3951 [`FileTypeExt::is_char_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_char_device
3952 [`FileTypeExt::is_fifo`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_fifo
3953 [`FileTypeExt::is_socket`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_socket
3954 [`FileTypeExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html
3955 [`Formatter::alternate`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.alternate
3956 [`Formatter::fill`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.fill
3957 [`Formatter::precision`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.precision
3958 [`Formatter::sign_aware_zero_pad`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_aware_zero_pad
3959 [`Formatter::sign_minus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_minus
3960 [`Formatter::sign_plus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_plus
3961 [`Formatter::width`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.width
3962 [`Iterator::cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.cmp
3963 [`Iterator::eq`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.eq
3964 [`Iterator::ge`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ge
3965 [`Iterator::gt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.gt
3966 [`Iterator::le`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.le
3967 [`Iterator::lt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.lt
3968 [`Iterator::ne`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ne
3969 [`Iterator::partial_cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.partial_cmp
3970 [`Path::canonicalize`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.canonicalize
3971 [`Path::exists`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.exists
3972 [`Path::is_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_dir
3973 [`Path::is_file`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_file
3974 [`Path::metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.metadata
3975 [`Path::read_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_dir
3976 [`Path::read_link`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_link
3977 [`Path::symlink_metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.symlink_metadata
3978 [`Utf8Error::valid_up_to`]: http://doc.rust-lang.org/nightly/core/str/struct.Utf8Error.html#method.valid_up_to
3979 [`Vec::resize`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.resize
3980 [`VecDeque::as_mut_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_mut_slices
3981 [`VecDeque::as_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_slices
3982 [`VecDeque::insert`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.insert
3983 [`VecDeque::shrink_to_fit`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.shrink_to_fit
3984 [`VecDeque::swap_remove_back`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_back
3985 [`VecDeque::swap_remove_front`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_front
3986 [`slice::split_first_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first_mut
3987 [`slice::split_first`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first
3988 [`slice::split_last_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last_mut
3989 [`slice::split_last`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last
3990 [`char::from_u32_unchecked`]: http://doc.rust-lang.org/nightly/std/char/fn.from_u32_unchecked.html
3991 [`fs::canonicalize`]: http://doc.rust-lang.org/nightly/std/fs/fn.canonicalize.html
3992 [`str::MatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.MatchIndices.html
3993 [`str::RMatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.RMatchIndices.html
3994 [`str::match_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.match_indices
3995 [`str::rmatch_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatch_indices
3996 [`str::slice_mut_unchecked`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.slice_mut_unchecked
3997 [`string::ParseError`]: http://doc.rust-lang.org/nightly/std/string/enum.ParseError.html
3999 Version 1.4.0 (2015-10-29)
4000 ==========================
4002 * ~1200 changes, numerous bugfixes
4007 * Windows builds targeting the 64-bit MSVC ABI and linker (instead of
4008 GNU) are now supported and recommended for use.
4013 * [Several changes have been made to fix type soundness and improve
4014 the behavior of associated types][sound]. See [RFC 1214]. Although
4015 we have mostly introduced these changes as warnings this release, to
4016 become errors next release, there are still some scenarios that will
4017 see immediate breakage.
4018 * [The `str::lines` and `BufRead::lines` iterators treat `\r\n` as
4019 line breaks in addition to `\n`][crlf].
4020 * [Loans of `'static` lifetime extend to the end of a function][stat].
4021 * [`str::parse` no longer introduces avoidable rounding error when
4022 parsing floating point numbers. Together with earlier changes to
4023 float formatting/output, "round trips" like f.to_string().parse()
4024 now preserve the value of f exactly. Additionally, leading plus
4025 signs are now accepted][fp3].
4031 * `use` statements that import multiple items [can now rename
4032 them][i], as in `use foo::{bar as kitten, baz as puppy}`.
4033 * [Binops work correctly on fat pointers][binfat].
4034 * `pub extern crate`, which does not behave as expected, [issues a
4035 warning][pec] until a better solution is found.
4040 * [Many APIs were stabilized][stab]: `<Box<str>>::into_string`,
4041 [`Arc::downgrade`], [`Arc::get_mut`], [`Arc::make_mut`],
4042 [`Arc::try_unwrap`], [`Box::from_raw`], [`Box::into_raw`], [`CStr::to_str`],
4043 [`CStr::to_string_lossy`], [`CString::from_raw`], [`CString::into_raw`],
4044 [`IntoRawFd::into_raw_fd`], [`IntoRawFd`],
4045 `IntoRawHandle::into_raw_handle`, `IntoRawHandle`,
4046 `IntoRawSocket::into_raw_socket`, `IntoRawSocket`, [`Rc::downgrade`],
4047 [`Rc::get_mut`], [`Rc::make_mut`], [`Rc::try_unwrap`], [`Result::expect`],
4048 [`String::into_boxed_str`], [`TcpStream::read_timeout`],
4049 [`TcpStream::set_read_timeout`], [`TcpStream::set_write_timeout`],
4050 [`TcpStream::write_timeout`], [`UdpSocket::read_timeout`],
4051 [`UdpSocket::set_read_timeout`], [`UdpSocket::set_write_timeout`],
4052 [`UdpSocket::write_timeout`], `Vec::append`, `Vec::split_off`,
4053 [`VecDeque::append`], [`VecDeque::retain`], [`VecDeque::split_off`],
4054 [`rc::Weak::upgrade`], [`rc::Weak`], [`slice::Iter::as_slice`],
4055 [`slice::IterMut::into_slice`], [`str::CharIndices::as_str`],
4056 [`str::Chars::as_str`], [`str::split_at_mut`], [`str::split_at`],
4057 [`sync::Weak::upgrade`], [`sync::Weak`], [`thread::park_timeout`],
4059 * [Some APIs were deprecated][dep]: `BTreeMap::with_b`,
4060 `BTreeSet::with_b`, `Option::as_mut_slice`, `Option::as_slice`,
4061 `Result::as_mut_slice`, `Result::as_slice`, `f32::from_str_radix`,
4062 `f64::from_str_radix`.
4063 * [Reverse-searching strings is faster with the 'two-way'
4065 * [`std::io::copy` allows `?Sized` arguments][cc].
4066 * The `Windows`, `Chunks`, and `ChunksMut` iterators over slices all
4067 [override `count`, `nth` and `last` with an O(1)
4068 implementation][it].
4069 * [`Default` is implemented for arrays up to `[T; 32]`][d].
4070 * [`IntoRawFd` has been added to the Unix-specific prelude,
4071 `IntoRawSocket` and `IntoRawHandle` to the Windows-specific
4073 * [`Extend<String>` and `FromIterator<String` are both implemented for
4075 * [`IntoIterator` is implemented for references to `Option` and
4077 * [`HashMap` and `HashSet` implement `Extend<&T>` where `T:
4078 Copy`][ext] as part of [RFC 839]. This will cause type inference
4079 breakage in rare situations.
4080 * [`BinaryHeap` implements `Debug`][bh2].
4081 * [`Borrow` and `BorrowMut` are implemented for fixed-size
4083 * [`extern fn`s with the "Rust" and "C" ABIs implement common
4084 traits including `Eq`, `Ord`, `Debug`, `Hash`][fp].
4085 * [String comparison is faster][faststr].
4086 * `&mut T` where `T: std::fmt::Write` [also implements
4087 `std::fmt::Write`][mutw].
4088 * [A stable regression in `VecDeque::push_back` and other
4089 capacity-altering methods that caused panics for zero-sized types
4091 * [Function pointers implement traits for up to 12 parameters][fp2].
4096 * The compiler [no longer uses the 'morestack' feature to prevent
4097 stack overflow][mm]. Instead it uses guard pages and stack
4098 probes (though stack probes are not yet implemented on any platform
4100 * [The compiler matches traits faster when projections are involved][p].
4101 * The 'improper_ctypes' lint [no longer warns about use of `isize` and
4103 * [Cargo now displays useful information about what its doing during
4104 `cargo update`][cu].
4106 [`Arc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.downgrade
4107 [`Arc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.make_mut
4108 [`Arc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.get_mut
4109 [`Arc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.try_unwrap
4110 [`Box::from_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.from_raw
4111 [`Box::into_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.into_raw
4112 [`CStr::to_str`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_str
4113 [`CStr::to_string_lossy`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_string_lossy
4114 [`CString::from_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.from_raw
4115 [`CString::into_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_raw
4116 [`IntoRawFd::into_raw_fd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html#tymethod.into_raw_fd
4117 [`IntoRawFd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html
4118 [`Rc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.downgrade
4119 [`Rc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.get_mut
4120 [`Rc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.make_mut
4121 [`Rc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.try_unwrap
4122 [`Result::expect`]: http://doc.rust-lang.org/nightly/core/result/enum.Result.html#method.expect
4123 [`String::into_boxed_str`]: http://doc.rust-lang.org/nightly/collections/string/struct.String.html#method.into_boxed_str
4124 [`TcpStream::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
4125 [`TcpStream::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
4126 [`TcpStream::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
4127 [`TcpStream::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
4128 [`UdpSocket::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
4129 [`UdpSocket::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
4130 [`UdpSocket::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
4131 [`UdpSocket::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
4132 [`VecDeque::append`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.append
4133 [`VecDeque::retain`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.retain
4134 [`VecDeque::split_off`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.split_off
4135 [`rc::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html#method.upgrade
4136 [`rc::Weak`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html
4137 [`slice::Iter::as_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.Iter.html#method.as_slice
4138 [`slice::IterMut::into_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.IterMut.html#method.into_slice
4139 [`str::CharIndices::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.CharIndices.html#method.as_str
4140 [`str::Chars::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.Chars.html#method.as_str
4141 [`str::split_at_mut`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at_mut
4142 [`str::split_at`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at
4143 [`sync::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html#method.upgrade
4144 [`sync::Weak`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html
4145 [`thread::park_timeout`]: http://doc.rust-lang.org/nightly/std/thread/fn.park_timeout.html
4146 [`thread::sleep`]: http://doc.rust-lang.org/nightly/std/thread/fn.sleep.html
4147 [bh2]: https://github.com/rust-lang/rust/pull/28156
4148 [binfat]: https://github.com/rust-lang/rust/pull/28270
4149 [bm]: https://github.com/rust-lang/rust/pull/28197
4150 [cc]: https://github.com/rust-lang/rust/pull/27531
4151 [crlf]: https://github.com/rust-lang/rust/pull/28034
4152 [cu]: https://github.com/rust-lang/cargo/pull/1931
4153 [d]: https://github.com/rust-lang/rust/pull/27825
4154 [dep]: https://github.com/rust-lang/rust/pull/28339
4155 [es]: https://github.com/rust-lang/rust/pull/27956
4156 [ext]: https://github.com/rust-lang/rust/pull/28094
4157 [faststr]: https://github.com/rust-lang/rust/pull/28338
4158 [ffi]: https://github.com/rust-lang/rust/pull/28779
4159 [fp]: https://github.com/rust-lang/rust/pull/28268
4160 [fp2]: https://github.com/rust-lang/rust/pull/28560
4161 [fp3]: https://github.com/rust-lang/rust/pull/27307
4162 [i]: https://github.com/rust-lang/rust/pull/27451
4163 [into2]: https://github.com/rust-lang/rust/pull/28039
4164 [it]: https://github.com/rust-lang/rust/pull/27652
4165 [mm]: https://github.com/rust-lang/rust/pull/27338
4166 [mutw]: https://github.com/rust-lang/rust/pull/28368
4167 [sound]: https://github.com/rust-lang/rust/pull/27641
4168 [p]: https://github.com/rust-lang/rust/pull/27866
4169 [pec]: https://github.com/rust-lang/rust/pull/28486
4170 [pr]: https://github.com/rust-lang/rust/pull/27896
4171 [RFC 839]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
4172 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
4173 [s]: https://github.com/rust-lang/rust/pull/27474
4174 [stab]: https://github.com/rust-lang/rust/pull/28339
4175 [stat]: https://github.com/rust-lang/rust/pull/28321
4176 [vd]: https://github.com/rust-lang/rust/pull/28494
4178 Version 1.3.0 (2015-09-17)
4179 ==============================
4181 * ~900 changes, numerous bugfixes
4186 * The [new object lifetime defaults][nold] have been [turned
4187 on][nold2] after a cycle of warnings about the change. Now types
4188 like `&'a Box<Trait>` (or `&'a Rc<Trait>`, etc) will change from
4189 being interpreted as `&'a Box<Trait+'a>` to `&'a
4190 Box<Trait+'static>`.
4191 * [The Rustonomicon][nom] is a new book in the official documentation
4192 that dives into writing unsafe Rust.
4193 * The [`Duration`] API, [has been stabilized][ds]. This basic unit of
4194 timekeeping is employed by other std APIs, as well as out-of-tree
4200 * The [new object lifetime defaults][nold] have been [turned
4201 on][nold2] after a cycle of warnings about the change.
4202 * There is a known [regression][lr] in how object lifetime elision is
4203 interpreted, the proper solution for which is undetermined.
4204 * The `#[prelude_import]` attribute, an internal implementation
4205 detail, was accidentally stabilized previously. [It has been put
4206 behind the `prelude_import` feature gate][pi]. This change is
4207 believed to break no existing code.
4208 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
4209 [more sane for dynamically sized types][dst3]. Code that relied on
4210 the previous behavior is thought to be broken.
4211 * The `dropck` rules, which checks that destructors can't access
4212 destroyed values, [have been updated][dropck] to match the
4213 [RFC][dropckrfc]. This fixes some soundness holes, and as such will
4214 cause some previously-compiling code to no longer build.
4219 * The [new object lifetime defaults][nold] have been [turned
4220 on][nold2] after a cycle of warnings about the change.
4221 * Semicolons may [now follow types and paths in
4222 macros](https://github.com/rust-lang/rust/pull/27000).
4223 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
4224 [more sane for dynamically sized types][dst3]. Code that relied on
4225 the previous behavior is not known to exist, and suspected to be
4227 * `'static` variables [may now be recursive][st].
4228 * `ref` bindings choose between [`Deref`] and [`DerefMut`]
4229 implementations correctly.
4230 * The `dropck` rules, which checks that destructors can't access
4231 destroyed values, [have been updated][dropck] to match the
4237 * The [`Duration`] API, [has been stabilized][ds], as well as the
4238 `std::time` module, which presently contains only `Duration`.
4239 * `Box<str>` and `Box<[T]>` both implement `Clone`.
4240 * The owned C string, [`CString`], implements [`Borrow`] and the
4241 borrowed C string, [`CStr`], implements [`ToOwned`]. The two of
4242 these allow C strings to be borrowed and cloned in generic code.
4243 * [`CStr`] implements [`Debug`].
4244 * [`AtomicPtr`] implements [`Debug`].
4245 * [`Error`] trait objects [can be downcast to their concrete types][e]
4246 in many common configurations, using the [`is`], [`downcast`],
4247 [`downcast_ref`] and [`downcast_mut`] methods, similarly to the
4249 * Searching for substrings now [employs the two-way algorithm][search]
4250 instead of doing a naive search. This gives major speedups to a
4251 number of methods, including [`contains`][sc], [`find`][sf],
4252 [`rfind`][srf], [`split`][ss]. [`starts_with`][ssw] and
4253 [`ends_with`][sew] are also faster.
4254 * The performance of `PartialEq` for slices is [much faster][ps].
4255 * The [`Hash`] trait offers the default method, [`hash_slice`], which
4256 is overridden and optimized by the implementations for scalars.
4257 * The [`Hasher`] trait now has a number of specialized `write_*`
4258 methods for primitive types, for efficiency.
4259 * The I/O-specific error type, [`std::io::Error`][ie], gained a set of
4260 methods for accessing the 'inner error', if any: [`get_ref`][iegr],
4261 [`get_mut`][iegm], [`into_inner`][ieii]. As well, the implementation
4262 of [`std::error::Error::cause`][iec] also delegates to the inner
4264 * [`process::Child`][pc] gained the [`id`] method, which returns a
4265 `u32` representing the platform-specific process identifier.
4266 * The [`connect`] method on slices is deprecated, replaced by the new
4267 [`join`] method (note that both of these are on the *unstable*
4268 [`SliceConcatExt`] trait, but through the magic of the prelude are
4269 available to stable code anyway).
4270 * The [`Div`] operator is implemented for [`Wrapping`] types.
4271 * [`DerefMut` is implemented for `String`][dms].
4272 * Performance of SipHash (the default hasher for `HashMap`) is
4273 [better for long data][sh].
4274 * [`AtomicPtr`] implements [`Send`].
4275 * The [`read_to_end`] implementations for [`Stdin`] and [`File`]
4276 are now [specialized to use uninitialized buffers for increased
4278 * Lifetime parameters of foreign functions [are now resolved
4284 * Rust can now, with some coercion, [produce programs that run on
4285 Windows XP][xp], though XP is not considered a supported platform.
4286 * Porting Rust on Windows from the GNU toolchain to MSVC continues
4287 ([1][win1], [2][win2], [3][win3], [4][win4]). It is still not
4288 recommended for use in 1.3, though should be fully-functional
4289 in the [64-bit 1.4 beta][b14].
4290 * On Fedora-based systems installation will [properly configure the
4291 dynamic linker][fl].
4292 * The compiler gained many new extended error descriptions, which can
4293 be accessed with the `--explain` flag.
4294 * The `dropck` pass, which checks that destructors can't access
4295 destroyed values, [has been rewritten][dropck]. This fixes some
4296 soundness holes, and as such will cause some previously-compiling
4297 code to no longer build.
4298 * `rustc` now uses [LLVM to write archive files where possible][ar].
4299 Eventually this will eliminate the compiler's dependency on the ar
4301 * Rust has [preliminary support for i686 FreeBSD][fb] (it has long
4302 supported FreeBSD on x86_64).
4303 * The [`unused_mut`][lum], [`unconditional_recursion`][lur],
4304 [`improper_ctypes`][lic], and [`negate_unsigned`][lnu] lints are
4306 * If landing pads are disabled (with `-Z no-landing-pads`), [`panic!`
4307 will kill the process instead of leaking][nlp].
4309 [`Any`]: http://doc.rust-lang.org/nightly/std/any/trait.Any.html
4310 [`AtomicPtr`]: http://doc.rust-lang.org/nightly/std/sync/atomic/struct.AtomicPtr.html
4311 [`Borrow`]: http://doc.rust-lang.org/nightly/std/borrow/trait.Borrow.html
4312 [`CStr`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html
4313 [`CString`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html
4314 [`Debug`]: http://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
4315 [`DerefMut`]: http://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
4316 [`Deref`]: http://doc.rust-lang.org/nightly/std/ops/trait.Deref.html
4317 [`Div`]: http://doc.rust-lang.org/nightly/std/ops/trait.Div.html
4318 [`Duration`]: http://doc.rust-lang.org/nightly/std/time/struct.Duration.html
4319 [`Error`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html
4320 [`File`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html
4321 [`Hash`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html
4322 [`Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
4323 [`Send`]: http://doc.rust-lang.org/nightly/std/marker/trait.Send.html
4324 [`SliceConcatExt`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html
4325 [`Stdin`]: http://doc.rust-lang.org/nightly/std/io/struct.Stdin.html
4326 [`ToOwned`]: http://doc.rust-lang.org/nightly/std/borrow/trait.ToOwned.html
4327 [`Wrapping`]: http://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
4328 [`connect`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.connect
4329 [`downcast_mut`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_mut
4330 [`downcast_ref`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_ref
4331 [`downcast`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast
4332 [`hash_slice`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
4333 [`id`]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html#method.id
4334 [`is`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.is
4335 [`join`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.join
4336 [`read_to_end`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_to_end
4337 [ar]: https://github.com/rust-lang/rust/pull/26926
4338 [b14]: https://static.rust-lang.org/dist/rust-beta-x86_64-pc-windows-msvc.msi
4339 [dms]: https://github.com/rust-lang/rust/pull/26241
4340 [dropck]: https://github.com/rust-lang/rust/pull/27261
4341 [dropckrfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
4342 [ds]: https://github.com/rust-lang/rust/pull/26818
4343 [dst1]: http://doc.rust-lang.org/nightly/std/mem/fn.size_of_val.html
4344 [dst2]: http://doc.rust-lang.org/nightly/std/mem/fn.align_of_val.html
4345 [dst3]: https://github.com/rust-lang/rust/pull/27351
4346 [e]: https://github.com/rust-lang/rust/pull/24793
4347 [f]: https://github.com/rust-lang/rust/pull/26588
4348 [fb]: https://github.com/rust-lang/rust/pull/26959
4349 [fl]: https://github.com/rust-lang/rust-installer/pull/41
4350 [hs]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
4351 [ie]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html
4352 [iec]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.cause
4353 [iegm]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_mut
4354 [iegr]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_ref
4355 [ieii]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.into_inner
4356 [lic]: https://github.com/rust-lang/rust/pull/26583
4357 [lnu]: https://github.com/rust-lang/rust/pull/27026
4358 [lr]: https://github.com/rust-lang/rust/issues/27248
4359 [lum]: https://github.com/rust-lang/rust/pull/26378
4360 [lur]: https://github.com/rust-lang/rust/pull/26783
4361 [nlp]: https://github.com/rust-lang/rust/pull/27176
4362 [nold2]: https://github.com/rust-lang/rust/pull/27045
4363 [nold]: https://github.com/rust-lang/rfcs/blob/master/text/1156-adjust-default-object-bounds.md
4364 [nom]: http://doc.rust-lang.org/nightly/nomicon/
4365 [pc]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html
4366 [pi]: https://github.com/rust-lang/rust/pull/26699
4367 [ps]: https://github.com/rust-lang/rust/pull/26884
4368 [rte]: https://github.com/rust-lang/rust/pull/26950
4369 [sc]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.contains
4370 [search]: https://github.com/rust-lang/rust/pull/26327
4371 [sew]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.ends_with
4372 [sf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.find
4373 [sh]: https://github.com/rust-lang/rust/pull/27280
4374 [srf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rfind
4375 [ss]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split
4376 [ssw]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.starts_with
4377 [st]: https://github.com/rust-lang/rust/pull/26630
4378 [win1]: https://github.com/rust-lang/rust/pull/26569
4379 [win2]: https://github.com/rust-lang/rust/pull/26741
4380 [win3]: https://github.com/rust-lang/rust/pull/26741
4381 [win4]: https://github.com/rust-lang/rust/pull/27210
4382 [xp]: https://github.com/rust-lang/rust/pull/26569
4384 Version 1.2.0 (2015-08-07)
4385 ==========================
4387 * ~1200 changes, numerous bugfixes
4392 * [Dynamically-sized-type coercions][dst] allow smart pointer types
4393 like `Rc` to contain types without a fixed size, arrays and trait
4394 objects, finally enabling use of `Rc<[T]>` and completing the
4395 implementation of DST.
4396 * [Parallel codegen][parcodegen] is now working again, which can
4397 substantially speed up large builds in debug mode; It also gets
4398 another ~33% speedup when bootstrapping on a 4 core machine (using 8
4399 jobs). It's not enabled by default, but will be "in the near
4400 future". It can be activated with the `-C codegen-units=N` flag to
4402 * This is the first release with [experimental support for linking
4403 with the MSVC linker and lib C on Windows (instead of using the GNU
4404 variants via MinGW)][win]. It is yet recommended only for the most
4405 intrepid Rustaceans.
4406 * Benchmark compilations are showing a 30% improvement in
4407 bootstrapping over 1.1.
4412 * The [`to_uppercase`] and [`to_lowercase`] methods on `char` now do
4413 unicode case mapping, which is a previously-planned change in
4414 behavior and considered a bugfix.
4415 * [`mem::align_of`] now specifies [the *minimum alignment* for
4416 T][align], which is usually the alignment programs are interested
4417 in, and the same value reported by clang's
4418 `alignof`. [`mem::min_align_of`] is deprecated. This is not known to
4420 * [The `#[packed]` attribute is no longer silently accepted by the
4421 compiler][packed]. This attribute did nothing and code that
4422 mentioned it likely did not work as intended.
4423 * Associated type defaults are [now behind the
4424 `associated_type_defaults` feature gate][ad]. In 1.1 associated type
4425 defaults *did not work*, but could be mentioned syntactically. As
4426 such this breakage has minimal impact.
4431 * Patterns with `ref mut` now correctly invoke [`DerefMut`] when
4432 matching against dereferencable values.
4437 * The [`Extend`] trait, which grows a collection from an iterator, is
4438 implemented over iterators of references, for `String`, `Vec`,
4439 `LinkedList`, `VecDeque`, `EnumSet`, `BinaryHeap`, `VecMap`,
4440 `BTreeSet` and `BTreeMap`. [RFC][extend-rfc].
4441 * The [`iter::once`] function returns an iterator that yields a single
4442 element, and [`iter::empty`] returns an iterator that yields no
4444 * The [`matches`] and [`rmatches`] methods on `str` return iterators
4445 over substring matches.
4446 * [`Cell`] and [`RefCell`] both implement `Eq`.
4447 * A number of methods for wrapping arithmetic are added to the
4448 integral types, [`wrapping_div`], [`wrapping_rem`],
4449 [`wrapping_neg`], [`wrapping_shl`], [`wrapping_shr`]. These are in
4450 addition to the existing [`wrapping_add`], [`wrapping_sub`], and
4451 [`wrapping_mul`] methods, and alternatives to the [`Wrapping`]
4452 type.. It is illegal for the default arithmetic operations in Rust
4453 to overflow; the desire to wrap must be explicit.
4454 * The `{:#?}` formatting specifier [displays the alternate,
4455 pretty-printed][debugfmt] form of the `Debug` formatter. This
4456 feature was actually introduced prior to 1.0 with little
4458 * [`fmt::Formatter`] implements [`fmt::Write`], a `fmt`-specific trait
4459 for writing data to formatted strings, similar to [`io::Write`].
4460 * [`fmt::Formatter`] adds 'debug builder' methods, [`debug_struct`],
4461 [`debug_tuple`], [`debug_list`], [`debug_set`], [`debug_map`]. These
4462 are used by code generators to emit implementations of [`Debug`].
4463 * `str` has new [`to_uppercase`][strup] and [`to_lowercase`][strlow]
4464 methods that convert case, following Unicode case mapping.
4465 * It is now easier to handle poisoned locks. The [`PoisonError`]
4466 type, returned by failing lock operations, exposes `into_inner`,
4467 `get_ref`, and `get_mut`, which all give access to the inner lock
4468 guard, and allow the poisoned lock to continue to operate. The
4469 `is_poisoned` method of [`RwLock`] and [`Mutex`] can poll for a
4470 poisoned lock without attempting to take the lock.
4471 * On Unix the [`FromRawFd`] trait is implemented for [`Stdio`], and
4472 [`AsRawFd`] for [`ChildStdin`], [`ChildStdout`], [`ChildStderr`].
4473 On Windows the `FromRawHandle` trait is implemented for `Stdio`,
4474 and `AsRawHandle` for `ChildStdin`, `ChildStdout`,
4476 * [`io::ErrorKind`] has a new variant, `InvalidData`, which indicates
4482 * `rustc` employs smarter heuristics for guessing at [typos].
4483 * `rustc` emits more efficient code for [no-op conversions between
4484 unsafe pointers][nop].
4485 * Fat pointers are now [passed in pairs of immediate arguments][fat],
4486 resulting in faster compile times and smaller code.
4488 [`Extend`]: https://doc.rust-lang.org/nightly/std/iter/trait.Extend.html
4489 [extend-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
4490 [`iter::once`]: https://doc.rust-lang.org/nightly/std/iter/fn.once.html
4491 [`iter::empty`]: https://doc.rust-lang.org/nightly/std/iter/fn.empty.html
4492 [`matches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.matches
4493 [`rmatches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatches
4494 [`Cell`]: https://doc.rust-lang.org/nightly/std/cell/struct.Cell.html
4495 [`RefCell`]: https://doc.rust-lang.org/nightly/std/cell/struct.RefCell.html
4496 [`wrapping_add`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_add
4497 [`wrapping_sub`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_sub
4498 [`wrapping_mul`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_mul
4499 [`wrapping_div`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_div
4500 [`wrapping_rem`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_rem
4501 [`wrapping_neg`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_neg
4502 [`wrapping_shl`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shl
4503 [`wrapping_shr`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shr
4504 [`Wrapping`]: https://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
4505 [`fmt::Formatter`]: https://doc.rust-lang.org/nightly/std/fmt/struct.Formatter.html
4506 [`fmt::Write`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Write.html
4507 [`io::Write`]: https://doc.rust-lang.org/nightly/std/io/trait.Write.html
4508 [`debug_struct`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_struct
4509 [`debug_tuple`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_tuple
4510 [`debug_list`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_list
4511 [`debug_set`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_set
4512 [`debug_map`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_map
4513 [`Debug`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
4514 [strup]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_uppercase
4515 [strlow]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_lowercase
4516 [`to_uppercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_uppercase
4517 [`to_lowercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_lowercase
4518 [`PoisonError`]: https://doc.rust-lang.org/nightly/std/sync/struct.PoisonError.html
4519 [`RwLock`]: https://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html
4520 [`Mutex`]: https://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html
4521 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
4522 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
4523 [`Stdio`]: https://doc.rust-lang.org/nightly/std/process/struct.Stdio.html
4524 [`ChildStdin`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdin.html
4525 [`ChildStdout`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdout.html
4526 [`ChildStderr`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStderr.html
4527 [`io::ErrorKind`]: https://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html
4528 [debugfmt]: https://www.reddit.com/r/rust/comments/3ceaui/psa_produces_prettyprinted_debug_output/
4529 [`DerefMut`]: https://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
4530 [`mem::align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.align_of.html
4531 [align]: https://github.com/rust-lang/rust/pull/25646
4532 [`mem::min_align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.min_align_of.html
4533 [typos]: https://github.com/rust-lang/rust/pull/26087
4534 [nop]: https://github.com/rust-lang/rust/pull/26336
4535 [fat]: https://github.com/rust-lang/rust/pull/26411
4536 [dst]: https://github.com/rust-lang/rfcs/blob/master/text/0982-dst-coercion.md
4537 [parcodegen]: https://github.com/rust-lang/rust/pull/26018
4538 [packed]: https://github.com/rust-lang/rust/pull/25541
4539 [ad]: https://github.com/rust-lang/rust/pull/27382
4540 [win]: https://github.com/rust-lang/rust/pull/25350
4542 Version 1.1.0 (2015-06-25)
4543 =========================
4545 * ~850 changes, numerous bugfixes
4550 * The [`std::fs` module has been expanded][fs] to expand the set of
4551 functionality exposed:
4552 * `DirEntry` now supports optimizations like `file_type` and `metadata` which
4553 don't incur a syscall on some platforms.
4554 * A `symlink_metadata` function has been added.
4555 * The `fs::Metadata` structure now lowers to its OS counterpart, providing
4556 access to all underlying information.
4557 * The compiler now contains extended explanations of many errors. When an error
4558 with an explanation occurs the compiler suggests using the `--explain` flag
4559 to read the explanation. Error explanations are also [available online][err-index].
4560 * Thanks to multiple [improvements][sk] to [type checking][pre], as
4561 well as other work, the time to bootstrap the compiler decreased by
4567 * The [`str::split_whitespace`] method splits a string on unicode
4568 whitespace boundaries.
4569 * On both Windows and Unix, new extension traits provide conversion of
4570 I/O types to and from the underlying system handles. On Unix, these
4571 traits are [`FromRawFd`] and [`AsRawFd`], on Windows `FromRawHandle`
4572 and `AsRawHandle`. These are implemented for `File`, `TcpStream`,
4573 `TcpListener`, and `UpdSocket`. Further implementations for
4574 `std::process` will be stabilized later.
4575 * On Unix, [`std::os::unix::symlink`] creates symlinks. On
4576 Windows, symlinks can be created with
4577 `std::os::windows::symlink_dir` and
4578 `std::os::windows::symlink_file`.
4579 * The `mpsc::Receiver` type can now be converted into an iterator with
4580 `into_iter` on the [`IntoIterator`] trait.
4581 * `Ipv4Addr` can be created from `u32` with the `From<u32>`
4582 implementation of the [`From`] trait.
4583 * The `Debug` implementation for `RangeFull` [creates output that is
4584 more consistent with other implementations][rf].
4585 * [`Debug` is implemented for `File`][file].
4586 * The `Default` implementation for `Arc` [no longer requires `Sync +
4588 * [The `Iterator` methods `count`, `nth`, and `last` have been
4589 overridden for slices to have O(1) performance instead of O(n)][si].
4590 * Incorrect handling of paths on Windows has been improved in both the
4591 compiler and the standard library.
4592 * [`AtomicPtr` gained a `Default` implementation][ap].
4593 * In accordance with Rust's policy on arithmetic overflow `abs` now
4594 [panics on overflow when debug assertions are enabled][abs].
4595 * The [`Cloned`] iterator, which was accidentally left unstable for
4596 1.0 [has been stabilized][c].
4597 * The [`Incoming`] iterator, which iterates over incoming TCP
4598 connections, and which was accidentally unnamable in 1.0, [is now
4599 properly exported][inc].
4600 * [`BinaryHeap`] no longer corrupts itself [when functions called by
4601 `sift_up` or `sift_down` panic][bh].
4602 * The [`split_off`] method of `LinkedList` [no longer corrupts
4603 the list in certain scenarios][ll].
4608 * Type checking performance [has improved notably][sk] with
4609 [multiple improvements][pre].
4610 * The compiler [suggests code changes][ch] for more errors.
4611 * rustc and it's build system have experimental support for [building
4612 toolchains against MUSL][m] instead of glibc on Linux.
4613 * The compiler defines the `target_env` cfg value, which is used for
4614 distinguishing toolchains that are otherwise for the same
4615 platform. Presently this is set to `gnu` for common GNU Linux
4616 targets and for MinGW targets, and `musl` for MUSL Linux targets.
4617 * The [`cargo rustc`][crc] command invokes a build with custom flags
4619 * [Android executables are always position independent][pie].
4620 * [The `drop_with_repr_extern` lint warns about mixing `repr(C)`
4623 [`str::split_whitespace`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_whitespace
4624 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
4625 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
4626 [`std::os::unix::symlink`]: https://doc.rust-lang.org/nightly/std/os/unix/fs/fn.symlink.html
4627 [`IntoIterator`]: https://doc.rust-lang.org/nightly/std/iter/trait.IntoIterator.html
4628 [`From`]: https://doc.rust-lang.org/nightly/std/convert/trait.From.html
4629 [rf]: https://github.com/rust-lang/rust/pull/24491
4630 [err-index]: https://doc.rust-lang.org/error-index.html
4631 [sk]: https://github.com/rust-lang/rust/pull/24615
4632 [pre]: https://github.com/rust-lang/rust/pull/25323
4633 [file]: https://github.com/rust-lang/rust/pull/24598
4634 [ch]: https://github.com/rust-lang/rust/pull/24683
4635 [arc]: https://github.com/rust-lang/rust/pull/24695
4636 [si]: https://github.com/rust-lang/rust/pull/24701
4637 [ap]: https://github.com/rust-lang/rust/pull/24834
4638 [m]: https://github.com/rust-lang/rust/pull/24777
4639 [fs]: https://github.com/rust-lang/rfcs/blob/master/text/1044-io-fs-2.1.md
4640 [crc]: https://github.com/rust-lang/cargo/pull/1568
4641 [pie]: https://github.com/rust-lang/rust/pull/24953
4642 [abs]: https://github.com/rust-lang/rust/pull/25441
4643 [c]: https://github.com/rust-lang/rust/pull/25496
4644 [`Cloned`]: https://doc.rust-lang.org/nightly/std/iter/struct.Cloned.html
4645 [`Incoming`]: https://doc.rust-lang.org/nightly/std/net/struct.Incoming.html
4646 [inc]: https://github.com/rust-lang/rust/pull/25522
4647 [bh]: https://github.com/rust-lang/rust/pull/25856
4648 [`BinaryHeap`]: https://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html
4649 [ll]: https://github.com/rust-lang/rust/pull/26022
4650 [`split_off`]: https://doc.rust-lang.org/nightly/collections/linked_list/struct.LinkedList.html#method.split_off
4651 [drop]: https://github.com/rust-lang/rust/pull/24935
4653 Version 1.0.0 (2015-05-15)
4654 ========================
4656 * ~1500 changes, numerous bugfixes
4661 * The vast majority of the standard library is now `#[stable]`. It is
4662 no longer possible to use unstable features with a stable build of
4664 * Many popular crates on [crates.io] now work on the stable release
4666 * Arithmetic on basic integer types now [checks for overflow in debug
4672 * Several [restrictions have been added to trait coherence][coh] in
4673 order to make it easier for upstream authors to change traits
4674 without breaking downstream code.
4675 * Digits of binary and octal literals are [lexed more eagerly][lex] to
4676 improve error messages and macro behavior. For example, `0b1234` is
4677 now lexed as `0b1234` instead of two tokens, `0b1` and `234`.
4678 * Trait bounds [are always invariant][inv], eliminating the need for
4679 the `PhantomFn` and `MarkerTrait` lang items, which have been
4681 * ["-" is no longer a valid character in crate names][cr], the `extern crate
4682 "foo" as bar` syntax has been replaced with `extern crate foo as
4683 bar`, and Cargo now automatically translates "-" in *package* names
4684 to underscore for the crate name.
4685 * [Lifetime shadowing is an error][lt].
4686 * [`Send` no longer implies `'static`][send-rfc].
4687 * [UFCS now supports trait-less associated paths][moar-ufcs] like
4688 `MyType::default()`.
4689 * Primitive types [now have inherent methods][prim-inherent],
4690 obviating the need for extension traits like `SliceExt`.
4691 * Methods with `Self: Sized` in their `where` clause are [considered
4692 object-safe][self-sized], allowing many extension traits like
4693 `IteratorExt` to be merged into the traits they extended.
4694 * You can now [refer to associated types][assoc-where] whose
4695 corresponding trait bounds appear only in a `where` clause.
4696 * The final bits of [OIBIT landed][oibit-final], meaning that traits
4697 like `Send` and `Sync` are now library-defined.
4698 * A [Reflect trait][reflect] was introduced, which means that
4699 downcasting via the `Any` trait is effectively limited to concrete
4700 types. This helps retain the potentially-important "parametricity"
4701 property: generic code cannot behave differently for different type
4702 arguments except in minor ways.
4703 * The `unsafe_destructor` feature is now deprecated in favor of the
4704 [new `dropck`][dropck]. This change is a major reduction in unsafe
4710 * The `thread_local` module [has been renamed to `std::thread`][th].
4711 * The methods of `IteratorExt` [have been moved to the `Iterator`
4713 * Several traits that implement Rust's conventions for type
4714 conversions, `AsMut`, `AsRef`, `From`, and `Into` have been
4715 [centralized in the `std::convert` module][con].
4716 * The `FromError` trait [was removed in favor of `From`][fe].
4717 * The basic sleep function [has moved to
4718 `std::thread::sleep_ms`][slp].
4719 * The `splitn` function now takes an `n` parameter that represents the
4720 number of items yielded by the returned iterator [instead of the
4721 number of 'splits'][spl].
4722 * [On Unix, all file descriptors are `CLOEXEC` by default][clo].
4723 * [Derived implementations of `PartialOrd` now order enums according
4724 to their explicitly-assigned discriminants][po].
4725 * [Methods for searching strings are generic over `Pattern`s][pat],
4726 implemented presently by `&char`, `&str`, `FnMut(char) -> bool` and
4728 * [In method resolution, object methods are resolved before inherent
4730 * [`String::from_str` has been deprecated in favor of the `From` impl,
4731 `String::from`][sf].
4732 * [`io::Error` implements `Sync`][ios].
4733 * [The `words` method on `&str` has been replaced with
4734 `split_whitespace`][sw], to avoid answering the tricky question, 'what is
4736 * The new path and IO modules are complete and `#[stable]`. This
4737 was the major library focus for this cycle.
4738 * The path API was [revised][path-normalize] to normalize `.`,
4739 adjusting the tradeoffs in favor of the most common usage.
4740 * A large number of remaining APIs in `std` were also stabilized
4741 during this cycle; about 75% of the non-deprecated API surface
4743 * The new [string pattern API][string-pattern] landed, which makes
4744 the string slice API much more internally consistent and flexible.
4745 * A new set of [generic conversion traits][conversion] replaced
4746 many existing ad hoc traits.
4747 * Generic numeric traits were [completely removed][num-traits]. This
4748 was made possible thanks to inherent methods for primitive types,
4749 and the removal gives maximal flexibility for designing a numeric
4750 hierarchy in the future.
4751 * The `Fn` traits are now related via [inheritance][fn-inherit]
4752 and provide ergonomic [blanket implementations][fn-blanket].
4753 * The `Index` and `IndexMut` traits were changed to
4754 [take the index by value][index-value], enabling code like
4755 `hash_map["string"]` to work.
4756 * `Copy` now [inherits][copy-clone] from `Clone`, meaning that all
4757 `Copy` data is known to be `Clone` as well.
4762 * Many errors now have extended explanations that can be accessed with
4763 the `--explain` flag to `rustc`.
4764 * Many new examples have been added to the standard library
4766 * rustdoc has received a number of improvements focused on completion
4768 * Metadata was tuned, shrinking binaries [by 27%][metadata-shrink].
4769 * Much headway was made on ecosystem-wide CI, making it possible
4770 to [compare builds for breakage][ci-compare].
4773 [crates.io]: http://crates.io
4774 [clo]: https://github.com/rust-lang/rust/pull/24034
4775 [coh]: https://github.com/rust-lang/rfcs/blob/master/text/1023-rebalancing-coherence.md
4776 [con]: https://github.com/rust-lang/rust/pull/23875
4777 [cr]: https://github.com/rust-lang/rust/pull/23419
4778 [fe]: https://github.com/rust-lang/rust/pull/23879
4779 [ie]: https://github.com/rust-lang/rust/pull/23300
4780 [inv]: https://github.com/rust-lang/rust/pull/23938
4781 [ios]: https://github.com/rust-lang/rust/pull/24133
4782 [lex]: https://github.com/rust-lang/rfcs/blob/master/text/0879-small-base-lexing.md
4783 [lt]: https://github.com/rust-lang/rust/pull/24057
4784 [meth]: https://github.com/rust-lang/rust/pull/24056
4785 [pat]: https://github.com/rust-lang/rfcs/blob/master/text/0528-string-patterns.md
4786 [po]: https://github.com/rust-lang/rust/pull/24270
4787 [sf]: https://github.com/rust-lang/rust/pull/24517
4788 [slp]: https://github.com/rust-lang/rust/pull/23949
4789 [spl]: https://github.com/rust-lang/rfcs/blob/master/text/0979-align-splitn-with-other-languages.md
4790 [sw]: https://github.com/rust-lang/rfcs/blob/master/text/1054-str-words.md
4791 [th]: https://github.com/rust-lang/rfcs/blob/master/text/0909-move-thread-local-to-std-thread.md
4792 [send-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0458-send-improvements.md
4793 [moar-ufcs]: https://github.com/rust-lang/rust/pull/22172
4794 [prim-inherent]: https://github.com/rust-lang/rust/pull/23104
4795 [overflow]: https://github.com/rust-lang/rfcs/blob/master/text/0560-integer-overflow.md
4796 [metadata-shrink]: https://github.com/rust-lang/rust/pull/22971
4797 [self-sized]: https://github.com/rust-lang/rust/pull/22301
4798 [assoc-where]: https://github.com/rust-lang/rust/pull/22512
4799 [string-pattern]: https://github.com/rust-lang/rust/pull/22466
4800 [oibit-final]: https://github.com/rust-lang/rust/pull/21689
4801 [reflect]: https://github.com/rust-lang/rust/pull/23712
4802 [conversion]: https://github.com/rust-lang/rfcs/pull/529
4803 [num-traits]: https://github.com/rust-lang/rust/pull/23549
4804 [index-value]: https://github.com/rust-lang/rust/pull/23601
4805 [dropck]: https://github.com/rust-lang/rfcs/pull/769
4806 [ci-compare]: https://gist.github.com/brson/a30a77836fbec057cbee
4807 [fn-inherit]: https://github.com/rust-lang/rust/pull/23282
4808 [fn-blanket]: https://github.com/rust-lang/rust/pull/23895
4809 [copy-clone]: https://github.com/rust-lang/rust/pull/23860
4810 [path-normalize]: https://github.com/rust-lang/rust/pull/23229
4813 Version 1.0.0-alpha.2 (2015-02-20)
4814 =====================================
4816 * ~1300 changes, numerous bugfixes
4820 * The various I/O modules were [overhauled][io-rfc] to reduce
4821 unnecessary abstractions and provide better interoperation with
4822 the underlying platform. The old `io` module remains temporarily
4824 * The standard library now [participates in feature gating][feat],
4825 so use of unstable libraries now requires a `#![feature(...)]`
4826 attribute. The impact of this change is [described on the
4827 forum][feat-forum]. [RFC][feat-rfc].
4831 * `for` loops [now operate on the `IntoIterator` trait][into],
4832 which eliminates the need to call `.iter()`, etc. to iterate
4833 over collections. There are some new subtleties to remember
4834 though regarding what sort of iterators various types yield, in
4835 particular that `for foo in bar { }` yields values from a move
4836 iterator, destroying the original collection. [RFC][into-rfc].
4837 * Objects now have [default lifetime bounds][obj], so you don't
4838 have to write `Box<Trait+'static>` when you don't care about
4839 storing references. [RFC][obj-rfc].
4840 * In types that implement `Drop`, [lifetimes must outlive the
4841 value][drop]. This will soon make it possible to safely
4842 implement `Drop` for types where `#[unsafe_destructor]` is now
4843 required. Read the [gorgeous RFC][drop-rfc] for details.
4844 * The fully qualified <T as Trait>::X syntax lets you set the Self
4845 type for a trait method or associated type. [RFC][ufcs-rfc].
4846 * References to types that implement `Deref<U>` now [automatically
4847 coerce to references][deref] to the dereferenced type `U`,
4848 e.g. `&T where T: Deref<U>` automatically coerces to `&U`. This
4849 should eliminate many unsightly uses of `&*`, as when converting
4850 from references to vectors into references to
4851 slices. [RFC][deref-rfc].
4852 * The explicit [closure kind syntax][close] (`|&:|`, `|&mut:|`,
4853 `|:|`) is obsolete and closure kind is inferred from context.
4854 * [`Self` is a keyword][Self].
4858 * The `Show` and `String` formatting traits [have been
4859 renamed][fmt] to `Debug` and `Display` to more clearly reflect
4860 their related purposes. Automatically getting a string
4861 conversion to use with `format!("{:?}", something_to_debug)` is
4862 now written `#[derive(Debug)]`.
4863 * Abstract [OS-specific string types][osstr], `std::ff::{OsString,
4864 OsStr}`, provide strings in platform-specific encodings for easier
4865 interop with system APIs. [RFC][osstr-rfc].
4866 * The `boxed::into_raw` and `Box::from_raw` functions [convert
4867 between `Box<T>` and `*mut T`][boxraw], a common pattern for
4868 creating raw pointers.
4872 * Certain long error messages of the form 'expected foo found bar'
4873 are now [split neatly across multiple
4874 lines][multiline]. Examples in the PR.
4875 * On Unix Rust can be [uninstalled][un] by running
4876 `/usr/local/lib/rustlib/uninstall.sh`.
4877 * The `#[rustc_on_unimplemented]` attribute, requiring the
4878 'on_unimplemented' feature, lets rustc [display custom error
4879 messages when a trait is expected to be implemented for a type
4884 * Rust is tested against a [LALR grammar][lalr], which parses
4885 almost all the Rust files that rustc does.
4887 [boxraw]: https://github.com/rust-lang/rust/pull/21318
4888 [close]: https://github.com/rust-lang/rust/pull/21843
4889 [deref]: https://github.com/rust-lang/rust/pull/21351
4890 [deref-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0241-deref-conversions.md
4891 [drop]: https://github.com/rust-lang/rust/pull/21972
4892 [drop-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
4893 [feat]: https://github.com/rust-lang/rust/pull/21248
4894 [feat-forum]: https://users.rust-lang.org/t/psa-important-info-about-rustcs-new-feature-staging/82/5
4895 [feat-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0507-release-channels.md
4896 [fmt]: https://github.com/rust-lang/rust/pull/21457
4897 [into]: https://github.com/rust-lang/rust/pull/20790
4898 [into-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md#intoiterator-and-iterable
4899 [io-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
4900 [lalr]: https://github.com/rust-lang/rust/pull/21452
4901 [multiline]: https://github.com/rust-lang/rust/pull/19870
4902 [obj]: https://github.com/rust-lang/rust/pull/22230
4903 [obj-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0599-default-object-bound.md
4904 [onun]: https://github.com/rust-lang/rust/pull/20889
4905 [osstr]: https://github.com/rust-lang/rust/pull/21488
4906 [osstr-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
4907 [Self]: https://github.com/rust-lang/rust/pull/22158
4908 [ufcs-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0132-ufcs.md
4909 [un]: https://github.com/rust-lang/rust/pull/22256
4912 Version 1.0.0-alpha (2015-01-09)
4913 ==================================
4915 * ~2400 changes, numerous bugfixes
4919 * The language itself is considered feature complete for 1.0,
4920 though there will be many usability improvements and bugfixes
4921 before the final release.
4922 * Nearly 50% of the public API surface of the standard library has
4923 been declared 'stable'. Those interfaces are unlikely to change
4925 * The long-running debate over integer types has been
4926 [settled][ints]: Rust will ship with types named `isize` and
4927 `usize`, rather than `int` and `uint`, for pointer-sized
4928 integers. Guidelines will be rolled out during the alpha cycle.
4929 * Most crates that are not `std` have been moved out of the Rust
4930 distribution into the Cargo ecosystem so they can evolve
4931 separately and don't need to be stabilized as quickly, including
4932 'time', 'getopts', 'num', 'regex', and 'term'.
4933 * Documentation continues to be expanded with more API coverage, more
4934 examples, and more in-depth explanations. The guides have been
4935 consolidated into [The Rust Programming Language][trpl].
4936 * "[Rust By Example][rbe]" is now maintained by the Rust team.
4937 * All official Rust binary installers now come with [Cargo], the
4938 Rust package manager.
4942 * Closures have been [completely redesigned][unboxed] to be
4943 implemented in terms of traits, can now be used as generic type
4944 bounds and thus monomorphized and inlined, or via an opaque
4945 pointer (boxed) as in the old system. The new system is often
4946 referred to as 'unboxed' closures.
4947 * Traits now support [associated types][assoc], allowing families
4948 of related types to be defined together and used generically in
4950 * Enum variants are [namespaced by their type names][enum].
4951 * [`where` clauses][where] provide a more versatile and attractive
4952 syntax for specifying generic bounds, though the previous syntax
4954 * Rust again picks a [fallback][fb] (either i32 or f64) for uninferred
4956 * Rust [no longer has a runtime][rt] of any description, and only
4957 supports OS threads, not green threads.
4958 * At long last, Rust has been overhauled for 'dynamically-sized
4959 types' ([DST]), which integrates 'fat pointers' (object types,
4960 arrays, and `str`) more deeply into the type system, making it
4962 * Rust now has a general [range syntax][range], `i..j`, `i..`, and
4963 `..j` that produce range types and which, when combined with the
4964 `Index` operator and multidispatch, leads to a convenient slice
4966 * The new range syntax revealed an ambiguity in the fixed-length
4967 array syntax, so now fixed length arrays [are written `[T;
4969 * The `Copy` trait is no longer implemented automatically. Unsafe
4970 pointers no longer implement `Sync` and `Send` so types
4971 containing them don't automatically either. `Sync` and `Send`
4972 are now 'unsafe traits' so one can "forcibly" implement them via
4973 `unsafe impl` if a type confirms to the requirements for them
4974 even though the internals do not (e.g. structs containing unsafe
4975 pointers like `Arc`). These changes are intended to prevent some
4976 footguns and are collectively known as [opt-in built-in
4977 traits][oibit] (though `Sync` and `Send` will soon become pure
4978 library types unknown to the compiler).
4979 * Operator traits now take their operands [by value][ops], and
4980 comparison traits can use multidispatch to compare one type
4981 against multiple other types, allowing e.g. `String` to be
4982 compared with `&str`.
4983 * `if let` and `while let` are no longer feature-gated.
4984 * Rust has adopted a more [uniform syntax for escaping unicode
4985 characters][unicode].
4986 * `macro_rules!` [has been declared stable][mac]. Though it is a
4987 flawed system it is sufficiently popular that it must be usable
4988 for 1.0. Effort has gone into [future-proofing][mac-future] it
4989 in ways that will allow other macro systems to be developed in
4990 parallel, and won't otherwise impact the evolution of the
4992 * The prelude has been [pared back significantly][prelude] such
4993 that it is the minimum necessary to support the most pervasive
4994 code patterns, and through [generalized where clauses][where]
4995 many of the prelude extension traits have been consolidated.
4996 * Rust's rudimentary reflection [has been removed][refl], as it
4997 incurred too much code generation for little benefit.
4998 * [Struct variants][structvars] are no longer feature-gated.
4999 * Trait bounds can be [polymorphic over lifetimes][hrtb]. Also
5000 known as 'higher-ranked trait bounds', this crucially allows
5001 unboxed closures to work.
5002 * Macros invocations surrounded by parens or square brackets and
5003 not terminated by a semicolon are [parsed as
5004 expressions][macros], which makes expressions like `vec![1i32,
5005 2, 3].len()` work as expected.
5006 * Trait objects now implement their traits automatically, and
5007 traits that can be coerced to objects now must be [object
5009 * Automatically deriving traits is now done with `#[derive(...)]`
5010 not `#[deriving(...)]` for [consistency with other naming
5011 conventions][derive].
5012 * Importing the containing module or enum at the same time as
5013 items or variants they contain is [now done with `self` instead
5014 of `mod`][self], as in use `foo::{self, bar}`
5015 * Glob imports are no longer feature-gated.
5016 * The `box` operator and `box` patterns have been feature-gated
5017 pending a redesign. For now unique boxes should be allocated
5018 like other containers, with `Box::new`.
5022 * A [series][coll1] of [efforts][coll2] to establish
5023 [conventions][coll3] for collections types has resulted in API
5024 improvements throughout the standard library.
5025 * New [APIs for error handling][err] provide ergonomic interop
5026 between error types, and [new conventions][err-conv] describe
5027 more clearly the recommended error handling strategies in Rust.
5028 * The `fail!` macro has been renamed to [`panic!`][panic] so that
5029 it is easier to discuss failure in the context of error handling
5030 without making clarifications as to whether you are referring to
5031 the 'fail' macro or failure more generally.
5032 * On Linux, `OsRng` prefers the new, more reliable `getrandom`
5033 syscall when available.
5034 * The 'serialize' crate has been renamed 'rustc-serialize' and
5035 moved out of the distribution to Cargo. Although it is widely
5036 used now, it is expected to be superseded in the near future.
5037 * The `Show` formatter, typically implemented with
5038 `#[derive(Show)]` is [now requested with the `{:?}`
5039 specifier][show] and is intended for use by all types, for uses
5040 such as `println!` debugging. The new `String` formatter must be
5041 implemented by hand, uses the `{}` specifier, and is intended
5042 for full-fidelity conversions of things that can logically be
5043 represented as strings.
5047 * [Flexible target specification][flex] allows rustc's code
5048 generation to be configured to support otherwise-unsupported
5050 * Rust comes with rust-gdb and rust-lldb scripts that launch their
5051 respective debuggers with Rust-appropriate pretty-printing.
5052 * The Windows installation of Rust is distributed with the
5053 MinGW components currently required to link binaries on that
5058 * Nullable enum optimizations have been extended to more types so
5059 that e.g. `Option<Vec<T>>` and `Option<String>` take up no more
5060 space than the inner types themselves.
5061 * Work has begun on supporting AArch64.
5063 [Cargo]: https://crates.io
5064 [unboxed]: http://smallcultfollowing.com/babysteps/blog/2014/11/26/purging-proc/
5065 [enum]: https://github.com/rust-lang/rfcs/blob/master/text/0390-enum-namespacing.md
5066 [flex]: https://github.com/rust-lang/rfcs/blob/master/text/0131-target-specification.md
5067 [err]: https://github.com/rust-lang/rfcs/blob/master/text/0201-error-chaining.md
5068 [err-conv]: https://github.com/rust-lang/rfcs/blob/master/text/0236-error-conventions.md
5069 [rt]: https://github.com/rust-lang/rfcs/blob/master/text/0230-remove-runtime.md
5070 [mac]: https://github.com/rust-lang/rfcs/blob/master/text/0453-macro-reform.md
5071 [mac-future]: https://github.com/rust-lang/rfcs/pull/550
5072 [DST]: http://smallcultfollowing.com/babysteps/blog/2014/01/05/dst-take-5/
5073 [coll1]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md
5074 [coll2]: https://github.com/rust-lang/rfcs/blob/master/text/0509-collections-reform-part-2.md
5075 [coll3]: https://github.com/rust-lang/rfcs/blob/master/text/0216-collection-views.md
5076 [ops]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md
5077 [prelude]: https://github.com/rust-lang/rfcs/blob/master/text/0503-prelude-stabilization.md
5078 [where]: https://github.com/rust-lang/rfcs/blob/master/text/0135-where.md
5079 [refl]: https://github.com/rust-lang/rfcs/blob/master/text/0379-remove-reflection.md
5080 [panic]: https://github.com/rust-lang/rfcs/blob/master/text/0221-panic.md
5081 [structvars]: https://github.com/rust-lang/rfcs/blob/master/text/0418-struct-variants.md
5082 [hrtb]: https://github.com/rust-lang/rfcs/blob/master/text/0387-higher-ranked-trait-bounds.md
5083 [unicode]: https://github.com/rust-lang/rfcs/blob/master/text/0446-es6-unicode-escapes.md
5084 [oibit]: https://github.com/rust-lang/rfcs/blob/master/text/0019-opt-in-builtin-traits.md
5085 [macros]: https://github.com/rust-lang/rfcs/blob/master/text/0378-expr-macros.md
5086 [range]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md#indexing-and-slicing
5087 [arrays]: https://github.com/rust-lang/rfcs/blob/master/text/0520-new-array-repeat-syntax.md
5088 [show]: https://github.com/rust-lang/rfcs/blob/master/text/0504-show-stabilization.md
5089 [derive]: https://github.com/rust-lang/rfcs/blob/master/text/0534-deriving2derive.md
5090 [self]: https://github.com/rust-lang/rfcs/blob/master/text/0532-self-in-use.md
5091 [fb]: https://github.com/rust-lang/rfcs/blob/master/text/0212-restore-int-fallback.md
5092 [objsafe]: https://github.com/rust-lang/rfcs/blob/master/text/0255-object-safety.md
5093 [assoc]: https://github.com/rust-lang/rfcs/blob/master/text/0195-associated-items.md
5094 [ints]: https://github.com/rust-lang/rfcs/pull/544#issuecomment-68760871
5095 [trpl]: https://doc.rust-lang.org/book/index.html
5096 [rbe]: http://rustbyexample.com/
5099 Version 0.12.0 (2014-10-09)
5100 =============================
5102 * ~1900 changes, numerous bugfixes
5106 * The introductory documentation (now called The Rust Guide) has
5107 been completely rewritten, as have a number of supplementary
5109 * Rust's package manager, Cargo, continues to improve and is
5110 sometimes considered to be quite awesome.
5111 * Many API's in `std` have been reviewed and updated for
5112 consistency with the in-development Rust coding
5113 guidelines. The standard library documentation tracks
5114 stabilization progress.
5115 * Minor libraries have been moved out-of-tree to the rust-lang org
5116 on GitHub: uuid, semver, glob, num, hexfloat, fourcc. They can
5117 be installed with Cargo.
5118 * Lifetime elision allows lifetime annotations to be left off of
5119 function declarations in many common scenarios.
5120 * Rust now works on 64-bit Windows.
5123 * Indexing can be overloaded with the `Index` and `IndexMut`
5125 * The `if let` construct takes a branch only if the `let` pattern
5126 matches, currently behind the 'if_let' feature gate.
5127 * 'where clauses', a more flexible syntax for specifying trait
5128 bounds that is more aesthetic, have been added for traits and
5129 free functions. Where clauses will in the future make it
5130 possible to constrain associated types, which would be
5131 impossible with the existing syntax.
5132 * A new slicing syntax (e.g. `[0..4]`) has been introduced behind
5133 the 'slicing_syntax' feature gate, and can be overloaded with
5134 the `Slice` or `SliceMut` traits.
5135 * The syntax for matching of sub-slices has been changed to use a
5136 postfix `..` instead of prefix (.e.g. `[a, b, c..]`), for
5137 consistency with other uses of `..` and to future-proof
5138 potential additional uses of the syntax.
5139 * The syntax for matching inclusive ranges in patterns has changed
5140 from `0..3` to `0...4` to be consistent with the exclusive range
5142 * Matching of sub-slices in non-tail positions (e.g. `[a.., b,
5143 c]`) has been put behind the 'advanced_slice_patterns' feature
5144 gate and may be removed in the future.
5145 * Components of tuples and tuple structs can be extracted using
5146 the `value.0` syntax, currently behind the `tuple_indexing`
5148 * The `#[crate_id]` attribute is no longer supported; versioning
5149 is handled by the package manager.
5150 * Renaming crate imports are now written `extern crate foo as bar`
5151 instead of `extern crate bar = foo`.
5152 * Renaming use statements are now written `use foo as bar` instead
5154 * `let` and `match` bindings and argument names in macros are now
5156 * The new, more efficient, closure types ('unboxed closures') have
5157 been added under a feature gate, 'unboxed_closures'. These will
5158 soon replace the existing closure types, once higher-ranked
5159 trait lifetimes are added to the language.
5160 * `move` has been added as a keyword, for indicating closures
5161 that capture by value.
5162 * Mutation and assignment is no longer allowed in pattern guards.
5163 * Generic structs and enums can now have trait bounds.
5164 * The `Share` trait is now called `Sync` to free up the term
5165 'shared' to refer to 'shared reference' (the default reference
5167 * Dynamically-sized types have been mostly implemented,
5168 unifying the behavior of fat-pointer types with the rest of the
5170 * As part of dynamically-sized types, the `Sized` trait has been
5171 introduced, which qualifying types implement by default, and
5172 which type parameters expect by default. To specify that a type
5173 parameter does not need to be sized, write `<Sized? T>`. Most
5174 types are `Sized`, notable exceptions being unsized arrays
5175 (`[T]`) and trait types.
5176 * Closures can return `!`, as in `|| -> !` or `proc() -> !`.
5177 * Lifetime bounds can now be applied to type parameters and object
5179 * The old, reference counted GC type, `Gc<T>` which was once
5180 denoted by the `@` sigil, has finally been removed. GC will be
5181 revisited in the future.
5184 * Library documentation has been improved for a number of modules.
5185 * Bit-vectors, collections::bitv has been modernized.
5186 * The url crate is deprecated in favor of
5187 http://github.com/servo/rust-url, which can be installed with
5189 * Most I/O stream types can be cloned and subsequently closed from
5191 * A `std::time::Duration` type has been added for use in I/O
5192 methods that rely on timers, as well as in the 'time' crate's
5193 `Timespec` arithmetic.
5194 * The runtime I/O abstraction layer that enabled the green thread
5195 scheduler to do non-thread-blocking I/O has been removed, along
5196 with the libuv-based implementation employed by the green thread
5197 scheduler. This will greatly simplify the future I/O work.
5198 * `collections::btree` has been rewritten to have a more
5199 idiomatic and efficient design.
5202 * rustdoc output now indicates the stability levels of API's.
5203 * The `--crate-name` flag can specify the name of the crate
5204 being compiled, like `#[crate_name]`.
5205 * The `-C metadata` specifies additional metadata to hash into
5206 symbol names, and `-C extra-filename` specifies additional
5207 information to put into the output filename, for use by the
5208 package manager for versioning.
5209 * debug info generation has continued to improve and should be
5210 more reliable under both gdb and lldb.
5211 * rustc has experimental support for compiling in parallel
5212 using the `-C codegen-units` flag.
5213 * rustc no longer encodes rpath information into binaries by
5217 * Stack usage has been optimized with LLVM lifetime annotations.
5218 * Official Rust binaries on Linux are more compatible with older
5219 kernels and distributions, built on CentOS 5.10.
5222 Version 0.11.0 (2014-07-02)
5223 ==========================
5225 * ~1700 changes, numerous bugfixes
5228 * ~[T] has been removed from the language. This type is superseded by
5230 * ~str has been removed from the language. This type is superseded by
5232 * ~T has been removed from the language. This type is superseded by the
5234 * @T has been removed from the language. This type is superseded by the
5235 standard library's std::gc::Gc<T> type.
5236 * Struct fields are now all private by default.
5237 * Vector indices and shift amounts are both required to be a `uint`
5238 instead of any integral type.
5239 * Byte character, byte string, and raw byte string literals are now all
5240 supported by prefixing the normal literal with a `b`.
5241 * Multiple ABIs are no longer allowed in an ABI string
5242 * The syntax for lifetimes on closures/procedures has been tweaked
5243 slightly: `<'a>|A, B|: 'b + K -> T`
5244 * Floating point modulus has been removed from the language; however it
5245 is still provided by a library implementation.
5246 * Private enum variants are now disallowed.
5247 * The `priv` keyword has been removed from the language.
5248 * A closure can no longer be invoked through a &-pointer.
5249 * The `use foo, bar, baz;` syntax has been removed from the language.
5250 * The transmute intrinsic no longer works on type parameters.
5251 * Statics now allow blocks/items in their definition.
5252 * Trait bounds are separated from objects with + instead of : now.
5253 * Objects can no longer be read while they are mutably borrowed.
5254 * The address of a static is now marked as insignificant unless the
5255 #[inline(never)] attribute is placed it.
5256 * The #[unsafe_destructor] attribute is now behind a feature gate.
5257 * Struct literals are no longer allowed in ambiguous positions such as
5258 if, while, match, and for..in.
5259 * Declaration of lang items and intrinsics are now feature-gated by
5261 * Integral literals no longer default to `int`, and floating point
5262 literals no longer default to `f64`. Literals must be suffixed with an
5263 appropriate type if inference cannot determine the type of the
5265 * The Box<T> type is no longer implicitly borrowed to &mut T.
5266 * Procedures are now required to not capture borrowed references.
5269 * The standard library is now a "facade" over a number of underlying
5270 libraries. This means that development on the standard library should
5271 be speedier due to smaller crates, as well as a clearer line between
5273 * A new library, libcore, lives under the standard library's facade
5274 which is Rust's "0-assumption" library, suitable for embedded and
5275 kernel development for example.
5276 * A regex crate has been added to the standard distribution. This crate
5277 includes statically compiled regular expressions.
5278 * The unwrap/unwrap_err methods on Result require a Show bound for
5279 better error messages.
5280 * The return types of the std::comm primitives have been centralized
5281 around the Result type.
5282 * A number of I/O primitives have gained the ability to time out their
5284 * A number of I/O primitives have gained the ability to close their
5285 reading/writing halves to cancel pending operations.
5286 * Reverse iterator methods have been removed in favor of `rev()` on
5287 their forward-iteration counterparts.
5288 * A bitflags! macro has been added to enable easy interop with C and
5289 management of bit flags.
5290 * A debug_assert! macro is now provided which is disabled when
5291 `--cfg ndebug` is passed to the compiler.
5292 * A graphviz crate has been added for creating .dot files.
5293 * The std::cast module has been migrated into std::mem.
5294 * The std::local_data api has been migrated from freestanding functions
5295 to being based on methods.
5296 * The Pod trait has been renamed to Copy.
5297 * jemalloc has been added as the default allocator for types.
5298 * The API for allocating memory has been changed to use proper alignment
5299 and sized deallocation
5300 * Connecting a TcpStream or binding a TcpListener is now based on a
5301 string address and a u16 port. This allows connecting to a hostname as
5303 * The Reader trait now contains a core method, read_at_least(), which
5304 correctly handles many repeated 0-length reads.
5305 * The process-spawning API is now centered around a builder-style
5307 * The :? printing qualifier has been moved from the standard library to
5308 an external libdebug crate.
5309 * Eq/Ord have been renamed to PartialEq/PartialOrd. TotalEq/TotalOrd
5310 have been renamed to Eq/Ord.
5311 * The select/plural methods have been removed from format!. The escapes
5312 for { and } have also changed from \{ and \} to {{ and }},
5314 * The TaskBuilder API has been re-worked to be a true builder, and
5315 extension traits for spawning native/green tasks have been added.
5318 * All breaking changes to the language or libraries now have their
5319 commit message annotated with `[breaking-change]` to allow for easy
5320 discovery of breaking changes.
5321 * The compiler will now try to suggest how to annotate lifetimes if a
5322 lifetime-related error occurs.
5323 * Debug info continues to be improved greatly with general bug fixes and
5324 better support for situations like link time optimization (LTO).
5325 * Usage of syntax extensions when cross-compiling has been fixed.
5326 * Functionality equivalent to GCC & Clang's -ffunction-sections,
5327 -fdata-sections and --gc-sections has been enabled by default
5328 * The compiler is now stricter about where it will load module files
5329 from when a module is declared via `mod foo;`.
5330 * The #[phase(syntax)] attribute has been renamed to #[phase(plugin)].
5331 Syntax extensions are now discovered via a "plugin registrar" type
5332 which will be extended in the future to other various plugins.
5333 * Lints have been restructured to allow for dynamically loadable lints.
5334 * A number of rustdoc improvements:
5335 * The HTML output has been visually redesigned.
5336 * Markdown is now powered by hoedown instead of sundown.
5337 * Searching heuristics have been greatly improved.
5338 * The search index has been reduced in size by a great amount.
5339 * Cross-crate documentation via `pub use` has been greatly improved.
5340 * Primitive types are now hyperlinked and documented.
5341 * Documentation has been moved from static.rust-lang.org/doc to
5343 * A new sandbox, play.rust-lang.org, is available for running and
5344 sharing rust code examples on-line.
5345 * Unused attributes are now more robustly warned about.
5346 * The dead_code lint now warns about unused struct fields.
5347 * Cross-compiling to iOS is now supported.
5348 * Cross-compiling to mipsel is now supported.
5349 * Stability attributes are now inherited by default and no longer apply
5350 to intra-crate usage, only inter-crate usage.
5351 * Error message related to non-exhaustive match expressions have been
5355 Version 0.10 (2014-04-03)
5356 =========================
5358 * ~1500 changes, numerous bugfixes
5361 * A new RFC process is now in place for modifying the language.
5362 * Patterns with `@`-pointers have been removed from the language.
5363 * Patterns with unique vectors (`~[T]`) have been removed from the
5365 * Patterns with unique strings (`~str`) have been removed from the
5367 * `@str` has been removed from the language.
5368 * `@[T]` has been removed from the language.
5369 * `@self` has been removed from the language.
5370 * `@Trait` has been removed from the language.
5371 * Headers on `~` allocations which contain `@` boxes inside the type for
5372 reference counting have been removed.
5373 * The semantics around the lifetimes of temporary expressions have changed,
5374 see #3511 and #11585 for more information.
5375 * Cross-crate syntax extensions are now possible, but feature gated. See
5376 #11151 for more information. This includes both `macro_rules!` macros as
5377 well as syntax extensions such as `format!`.
5378 * New lint modes have been added, and older ones have been turned on to be
5380 * Unnecessary parentheses
5383 * Uppercase variables
5384 * Publicly visible private types
5385 * `#[deriving]` with raw pointers
5386 * Unsafe functions can no longer be coerced to closures.
5387 * Various obscure macros such as `log_syntax!` are now behind feature gates.
5388 * The `#[simd]` attribute is now behind a feature gate.
5389 * Visibility is no longer allowed on `extern crate` statements, and
5390 unnecessary visibility (`priv`) is no longer allowed on `use` statements.
5391 * Trailing commas are now allowed in argument lists and tuple patterns.
5392 * The `do` keyword has been removed, it is now a reserved keyword.
5393 * Default type parameters have been implemented, but are feature gated.
5394 * Borrowed variables through captures in closures are now considered soundly.
5395 * `extern mod` is now `extern crate`
5396 * The `Freeze` trait has been removed.
5397 * The `Share` trait has been added for types that can be shared among
5399 * Labels in macros are now hygienic.
5400 * Expression/statement macro invocations can be delimited with `{}` now.
5401 * Treatment of types allowed in `static mut` locations has been tweaked.
5402 * The `*` and `.` operators are now overloadable through the `Deref` and
5404 * `~Trait` and `proc` no longer have `Send` bounds by default.
5405 * Partial type hints are now supported with the `_` type marker.
5406 * An `Unsafe` type was introduced for interior mutability. It is now
5407 considered undefined to transmute from `&T` to `&mut T` without using the
5409 * The #[linkage] attribute was implemented for extern statics/functions.
5410 * The inner attribute syntax has changed from `#[foo];` to `#![foo]`.
5411 * `Pod` was renamed to `Copy`.
5414 * The `libextra` library has been removed. It has now been decomposed into
5415 component libraries with smaller and more focused nuggets of
5416 functionality. The full list of libraries can be found on the
5417 documentation index page.
5418 * std: `std::condition` has been removed. All I/O errors are now propagated
5419 through the `Result` type. In order to assist with error handling, a
5420 `try!` macro for unwrapping errors with an early return and a lint for
5421 unused results has been added. See #12039 for more information.
5422 * std: The `vec` module has been renamed to `slice`.
5423 * std: A new vector type, `Vec<T>`, has been added in preparation for DST.
5424 This will become the only growable vector in the future.
5425 * std: `std::io` now has more public re-exports. Types such as `BufferedReader`
5426 are now found at `std::io::BufferedReader` instead of
5427 `std::io::buffered::BufferedReader`.
5428 * std: `print` and `println` are no longer in the prelude, the `print!` and
5429 `println!` macros are intended to be used instead.
5430 * std: `Rc` now has a `Weak` pointer for breaking cycles, and it no longer
5431 attempts to statically prevent cycles.
5432 * std: The standard distribution is adopting the policy of pushing failure
5433 to the user rather than failing in libraries. Many functions (such as
5434 `slice::last()`) now return `Option<T>` instead of `T` + failing.
5435 * std: `fmt::Default` has been renamed to `fmt::Show`, and it now has a new
5436 deriving mode: `#[deriving(Show)]`.
5437 * std: `ToStr` is now implemented for all types implementing `Show`.
5438 * std: The formatting trait methods now take `&self` instead of `&T`
5439 * std: The `invert()` method on iterators has been renamed to `rev()`
5440 * std: `std::num` has seen a reduction in the genericity of its traits,
5441 consolidating functionality into a few core traits.
5442 * std: Backtraces are now printed on task failure if the environment
5443 variable `RUST_BACKTRACE` is present.
5444 * std: Naming conventions for iterators have been standardized. More details
5445 can be found on the wiki's style guide.
5446 * std: `eof()` has been removed from the `Reader` trait. Specific types may
5447 still implement the function.
5448 * std: Networking types are now cloneable to allow simultaneous reads/writes.
5449 * std: `assert_approx_eq!` has been removed
5450 * std: The `e` and `E` formatting specifiers for floats have been added to
5451 print them in exponential notation.
5452 * std: The `Times` trait has been removed
5453 * std: Indications of variance and opting out of builtin bounds is done
5454 through marker types in `std::kinds::marker` now
5455 * std: `hash` has been rewritten, `IterBytes` has been removed, and
5456 `#[deriving(Hash)]` is now possible.
5457 * std: `SharedChan` has been removed, `Sender` is now cloneable.
5458 * std: `Chan` and `Port` were renamed to `Sender` and `Receiver`.
5459 * std: `Chan::new` is now `channel()`.
5460 * std: A new synchronous channel type has been implemented.
5461 * std: A `select!` macro is now provided for selecting over `Receiver`s.
5462 * std: `hashmap` and `trie` have been moved to `libcollections`
5463 * std: `run` has been rolled into `io::process`
5464 * std: `assert_eq!` now uses `{}` instead of `{:?}`
5465 * std: The equality and comparison traits have seen some reorganization.
5466 * std: `rand` has moved to `librand`.
5467 * std: `to_{lower,upper}case` has been implemented for `char`.
5468 * std: Logging has been moved to `liblog`.
5469 * collections: `HashMap` has been rewritten for higher performance and less
5471 * native: The default runtime is now `libnative`. If `libgreen` is desired,
5472 it can be booted manually. The runtime guide has more information and
5474 * native: All I/O functionality except signals has been implemented.
5475 * green: Task spawning with `libgreen` has been optimized with stack caching
5476 and various trimming of code.
5477 * green: Tasks spawned by `libgreen` now have an unmapped guard page.
5478 * sync: The `extra::sync` module has been updated to modern rust (and moved
5479 to the `sync` library), tweaking and improving various interfaces while
5480 dropping redundant functionality.
5481 * sync: A new `Barrier` type has been added to the `sync` library.
5482 * sync: An efficient mutex for native and green tasks has been implemented.
5483 * serialize: The `base64` module has seen some improvement. It treats
5484 newlines better, has non-string error values, and has seen general
5486 * fourcc: A `fourcc!` macro was introduced
5487 * hexfloat: A `hexfloat!` macro was implemented for specifying floats via a
5488 hexadecimal literal.
5491 * `rustpkg` has been deprecated and removed from the main repository. Its
5492 replacement, `cargo`, is under development.
5493 * Nightly builds of rust are now available
5494 * The memory usage of rustc has been improved many times throughout this
5496 * The build process supports disabling rpath support for the rustc binary
5498 * Code generation has improved in some cases, giving more information to the
5499 LLVM optimization passes to enable more extensive optimizations.
5500 * Debuginfo compatibility with lldb on OSX has been restored.
5501 * The master branch is now gated on an android bot, making building for
5502 android much more reliable.
5503 * Output flags have been centralized into one `--emit` flag.
5504 * Crate type flags have been centralized into one `--crate-type` flag.
5505 * Codegen flags have been consolidated behind a `-C` flag.
5506 * Linking against outdated crates now has improved error messages.
5507 * Error messages with lifetimes will often suggest how to annotate the
5508 function to fix the error.
5509 * Many more types are documented in the standard library, and new guides
5511 * Many `rustdoc` improvements:
5512 * code blocks are syntax highlighted.
5513 * render standalone markdown files.
5514 * the --test flag tests all code blocks by default.
5515 * exported macros are displayed.
5516 * re-exported types have their documentation inlined at the location of the
5518 * search works across crates that have been rendered to the same output
5522 Version 0.9 (2014-01-09)
5523 ==========================
5525 * ~1800 changes, numerous bugfixes
5528 * The `float` type has been removed. Use `f32` or `f64` instead.
5529 * A new facility for enabling experimental features (feature gating) has
5530 been added, using the crate-level `#[feature(foo)]` attribute.
5531 * Managed boxes (@) are now behind a feature gate
5532 (`#[feature(managed_boxes)]`) in preparation for future removal. Use the
5533 standard library's `Gc` or `Rc` types instead.
5534 * `@mut` has been removed. Use `std::cell::{Cell, RefCell}` instead.
5535 * Jumping back to the top of a loop is now done with `continue` instead of
5537 * Strings can no longer be mutated through index assignment.
5538 * Raw strings can be created via the basic `r"foo"` syntax or with matched
5539 hash delimiters, as in `r###"foo"###`.
5540 * `~fn` is now written `proc (args) -> retval { ... }` and may only be
5542 * The `&fn` type is now written `|args| -> ret` to match the literal form.
5543 * `@fn`s have been removed.
5544 * `do` only works with procs in order to make it obvious what the cost
5546 * Single-element tuple-like structs can no longer be dereferenced to
5547 obtain the inner value. A more comprehensive solution for overloading
5548 the dereference operator will be provided in the future.
5549 * The `#[link(...)]` attribute has been replaced with
5550 `#[crate_id = "name#vers"]`.
5551 * Empty `impl`s must be terminated with empty braces and may not be
5552 terminated with a semicolon.
5553 * Keywords are no longer allowed as lifetime names; the `self` lifetime
5554 no longer has any special meaning.
5555 * The old `fmt!` string formatting macro has been removed.
5556 * `printf!` and `printfln!` (old-style formatting) removed in favor of
5557 `print!` and `println!`.
5558 * `mut` works in patterns now, as in `let (mut x, y) = (1, 2);`.
5559 * The `extern mod foo (name = "bar")` syntax has been removed. Use
5560 `extern mod foo = "bar"` instead.
5561 * New reserved keywords: `alignof`, `offsetof`, `sizeof`.
5562 * Macros can have attributes.
5563 * Macros can expand to items with attributes.
5564 * Macros can expand to multiple items.
5565 * The `asm!` macro is feature-gated (`#[feature(asm)]`).
5566 * Comments may be nested.
5567 * Values automatically coerce to trait objects they implement, without
5569 * Enum discriminants are no longer an entire word but as small as needed to
5570 contain all the variants. The `repr` attribute can be used to override
5571 the discriminant size, as in `#[repr(int)]` for integer-sized, and
5572 `#[repr(C)]` to match C enums.
5573 * Non-string literals are not allowed in attributes (they never worked).
5574 * The FFI now supports variadic functions.
5575 * Octal numeric literals, as in `0o7777`.
5576 * The `concat!` syntax extension performs compile-time string concatenation.
5577 * The `#[fixed_stack_segment]` and `#[rust_stack]` attributes have been
5578 removed as Rust no longer uses segmented stacks.
5579 * Non-ascii identifiers are feature-gated (`#[feature(non_ascii_idents)]`).
5580 * Ignoring all fields of an enum variant or tuple-struct is done with `..`,
5581 not `*`; ignoring remaining fields of a struct is also done with `..`,
5582 not `_`; ignoring a slice of a vector is done with `..`, not `.._`.
5583 * `rustc` supports the "win64" calling convention via `extern "win64"`.
5584 * `rustc` supports the "system" calling convention, which defaults to the
5585 preferred convention for the target platform, "stdcall" on 32-bit Windows,
5587 * The `type_overflow` lint (default: warn) checks literals for overflow.
5588 * The `unsafe_block` lint (default: allow) checks for usage of `unsafe`.
5589 * The `attribute_usage` lint (default: warn) warns about unknown
5591 * The `unknown_features` lint (default: warn) warns about unknown
5593 * The `dead_code` lint (default: warn) checks for dead code.
5594 * Rust libraries can be linked statically to one another
5595 * `#[link_args]` is behind the `link_args` feature gate.
5596 * Native libraries are now linked with `#[link(name = "foo")]`
5597 * Native libraries can be statically linked to a rust crate
5598 (`#[link(name = "foo", kind = "static")]`).
5599 * Native OS X frameworks are now officially supported
5600 (`#[link(name = "foo", kind = "framework")]`).
5601 * The `#[thread_local]` attribute creates thread-local (not task-local)
5602 variables. Currently behind the `thread_local` feature gate.
5603 * The `return` keyword may be used in closures.
5604 * Types that can be copied via a memcpy implement the `Pod` kind.
5605 * The `cfg` attribute can now be used on struct fields and enum variants.
5608 * std: The `option` and `result` API's have been overhauled to make them
5609 simpler, more consistent, and more composable.
5610 * std: The entire `std::io` module has been replaced with one that is
5611 more comprehensive and that properly interfaces with the underlying
5612 scheduler. File, TCP, UDP, Unix sockets, pipes, and timers are all
5614 * std: `io::util` contains a number of useful implementations of
5615 `Reader` and `Writer`, including `NullReader`, `NullWriter`,
5616 `ZeroReader`, `TeeReader`.
5617 * std: The reference counted pointer type `extra::rc` moved into std.
5618 * std: The `Gc` type in the `gc` module will replace `@` (it is currently
5619 just a wrapper around it).
5620 * std: The `Either` type has been removed.
5621 * std: `fmt::Default` can be implemented for any type to provide default
5622 formatting to the `format!` macro, as in `format!("{}", myfoo)`.
5623 * std: The `rand` API continues to be tweaked.
5624 * std: The `rust_begin_unwind` function, useful for inserting breakpoints
5625 on failure in gdb, is now named `rust_fail`.
5626 * std: The `each_key` and `each_value` methods on `HashMap` have been
5627 replaced by the `keys` and `values` iterators.
5628 * std: Functions dealing with type size and alignment have moved from the
5629 `sys` module to the `mem` module.
5630 * std: The `path` module was written and API changed.
5631 * std: `str::from_utf8` has been changed to cast instead of allocate.
5632 * std: `starts_with` and `ends_with` methods added to vectors via the
5633 `ImmutableEqVector` trait, which is in the prelude.
5634 * std: Vectors can be indexed with the `get_opt` method, which returns `None`
5635 if the index is out of bounds.
5636 * std: Task failure no longer propagates between tasks, as the model was
5637 complex, expensive, and incompatible with thread-based tasks.
5638 * std: The `Any` type can be used for dynamic typing.
5639 * std: `~Any` can be passed to the `fail!` macro and retrieved via
5641 * std: Methods that produce iterators generally do not have an `_iter`
5643 * std: `cell::Cell` and `cell::RefCell` can be used to introduce mutability
5644 roots (mutable fields, etc.). Use instead of e.g. `@mut`.
5645 * std: `util::ignore` renamed to `prelude::drop`.
5646 * std: Slices have `sort` and `sort_by` methods via the `MutableVector`
5648 * std: `vec::raw` has seen a lot of cleanup and API changes.
5649 * std: The standard library no longer includes any C++ code, and very
5650 minimal C, eliminating the dependency on libstdc++.
5651 * std: Runtime scheduling and I/O functionality has been factored out into
5652 extensible interfaces and is now implemented by two different crates:
5653 libnative, for native threading and I/O; and libgreen, for green threading
5654 and I/O. This paves the way for using the standard library in more limited
5655 embedded environments.
5656 * std: The `comm` module has been rewritten to be much faster, have a
5657 simpler, more consistent API, and to work for both native and green
5659 * std: All libuv dependencies have been moved into the rustuv crate.
5660 * native: New implementations of runtime scheduling on top of OS threads.
5661 * native: New native implementations of TCP, UDP, file I/O, process spawning,
5663 * green: The green thread scheduler and message passing types are almost
5665 * extra: The `flatpipes` module had bitrotted and was removed.
5666 * extra: All crypto functions have been removed and Rust now has a policy of
5667 not reimplementing crypto in the standard library. In the future crypto
5668 will be provided by external crates with bindings to established libraries.
5669 * extra: `c_vec` has been modernized.
5670 * extra: The `sort` module has been removed. Use the `sort` method on
5674 * The `rust` and `rusti` commands have been removed, due to lack of
5676 * `rustdoc` was completely rewritten.
5677 * `rustdoc` can test code examples in documentation.
5678 * `rustpkg` can test packages with the argument, 'test'.
5679 * `rustpkg` supports arbitrary dependencies, including C libraries.
5680 * `rustc`'s support for generating debug info is improved again.
5681 * `rustc` has better error reporting for unbalanced delimiters.
5682 * `rustc`'s JIT support was removed due to bitrot.
5683 * Executables and static libraries can be built with LTO (-Z lto)
5684 * `rustc` adds a `--dep-info` flag for communicating dependencies to
5688 Version 0.8 (2013-09-26)
5689 ============================
5691 * ~2200 changes, numerous bugfixes
5694 * The `for` loop syntax has changed to work with the `Iterator` trait.
5695 * At long last, unwinding works on Windows.
5696 * Default methods are ready for use.
5697 * Many trait inheritance bugs fixed.
5698 * Owned and borrowed trait objects work more reliably.
5699 * `copy` is no longer a keyword. It has been replaced by the `Clone` trait.
5700 * rustc can omit emission of code for the `debug!` macro if it is passed
5702 * mod.rs is now "blessed". When loading `mod foo;`, rustc will now look
5703 for foo.rs, then foo/mod.rs, and will generate an error when both are
5705 * Strings no longer contain trailing nulls. The new `std::c_str` module
5706 provides new mechanisms for converting to C strings.
5707 * The type of foreign functions is now `extern "C" fn` instead of `*u8'.
5708 * The FFI has been overhauled such that foreign functions are called directly,
5709 instead of through a stack-switching wrapper.
5710 * Calling a foreign function must be done through a Rust function with the
5711 `#[fixed_stack_segment]` attribute.
5712 * The `externfn!` macro can be used to declare both a foreign function and
5713 a `#[fixed_stack_segment]` wrapper at once.
5714 * `pub` and `priv` modifiers on `extern` blocks are no longer parsed.
5715 * `unsafe` is no longer allowed on extern fns - they are all unsafe.
5716 * `priv` is disallowed everywhere except for struct fields and enum variants.
5717 * `&T` (besides `&'static T`) is no longer allowed in `@T`.
5718 * `ref` bindings in irrefutable patterns work correctly now.
5719 * `char` is now prevented from containing invalid code points.
5720 * Casting to `bool` is no longer allowed.
5721 * `\0` is now accepted as an escape in chars and strings.
5722 * `yield` is a reserved keyword.
5723 * `typeof` is a reserved keyword.
5724 * Crates may be imported by URL with `extern mod foo = "url";`.
5725 * Explicit enum discriminants may be given as uints as in `enum E { V = 0u }`
5726 * Static vectors can be initialized with repeating elements,
5727 e.g. `static foo: [u8, .. 100]: [0, .. 100];`.
5728 * Static structs can be initialized with functional record update,
5729 e.g. `static foo: Foo = Foo { a: 5, .. bar };`.
5730 * `cfg!` can be used to conditionally execute code based on the crate
5731 configuration, similarly to `#[cfg(...)]`.
5732 * The `unnecessary_qualification` lint detects unneeded module
5733 prefixes (default: allow).
5734 * Arithmetic operations have been implemented on the SIMD types in
5735 `std::unstable::simd`.
5736 * Exchange allocation headers were removed, reducing memory usage.
5737 * `format!` implements a completely new, extensible, and higher-performance
5738 string formatting system. It will replace `fmt!`.
5739 * `print!` and `println!` write formatted strings (using the `format!`
5740 extension) to stdout.
5741 * `write!` and `writeln!` write formatted strings (using the `format!`
5742 extension) to the new Writers in `std::rt::io`.
5743 * The library section in which a function or static is placed may
5744 be specified with `#[link_section = "..."]`.
5745 * The `proto!` syntax extension for defining bounded message protocols
5747 * `macro_rules!` is hygienic for `let` declarations.
5748 * The `#[export_name]` attribute specifies the name of a symbol.
5749 * `unreachable!` can be used to indicate unreachable code, and fails
5753 * std: Transitioned to the new runtime, written in Rust.
5754 * std: Added an experimental I/O library, `rt::io`, based on the new
5756 * std: A new generic `range` function was added to the prelude, replacing
5757 `uint::range` and friends.
5758 * std: `range_rev` no longer exists. Since range is an iterator it can be
5759 reversed with `range(lo, hi).invert()`.
5760 * std: The `chain` method on option renamed to `and_then`; `unwrap_or_default`
5761 renamed to `unwrap_or`.
5762 * std: The `iterator` module was renamed to `iter`.
5763 * std: Integral types now support the `checked_add`, `checked_sub`, and
5764 `checked_mul` operations for detecting overflow.
5765 * std: Many methods in `str`, `vec`, `option, `result` were renamed for
5767 * std: Methods are standardizing on conventions for casting methods:
5768 `to_foo` for copying, `into_foo` for moving, `as_foo` for temporary
5770 * std: The `CString` type in `c_str` provides new ways to convert to and
5772 * std: `DoubleEndedIterator` can yield elements in two directions.
5773 * std: The `mut_split` method on vectors partitions an `&mut [T]` into
5775 * std: `str::from_bytes` renamed to `str::from_utf8`.
5776 * std: `pop_opt` and `shift_opt` methods added to vectors.
5777 * std: The task-local data interface no longer uses @, and keys are
5778 no longer function pointers.
5779 * std: The `swap_unwrap` method of `Option` renamed to `take_unwrap`.
5780 * std: Added `SharedPort` to `comm`.
5781 * std: `Eq` has a default method for `ne`; only `eq` is required
5783 * std: `Ord` has default methods for `le`, `gt` and `ge`; only `lt`
5784 is required in implementations.
5785 * std: `is_utf8` performance is improved, impacting many string functions.
5786 * std: `os::MemoryMap` provides cross-platform mmap.
5787 * std: `ptr::offset` is now unsafe, but also more optimized. Offsets that
5788 are not 'in-bounds' are considered undefined.
5789 * std: Many freestanding functions in `vec` removed in favor of methods.
5790 * std: Many freestanding functions on scalar types removed in favor of
5792 * std: Many options to task builders were removed since they don't make
5793 sense in the new scheduler design.
5794 * std: More containers implement `FromIterator` so can be created by the
5796 * std: More complete atomic types in `unstable::atomics`.
5797 * std: `comm::PortSet` removed.
5798 * std: Mutating methods in the `Set` and `Map` traits have been moved into
5799 the `MutableSet` and `MutableMap` traits. `Container::is_empty`,
5800 `Map::contains_key`, `MutableMap::insert`, and `MutableMap::remove` have
5801 default implementations.
5802 * std: Various `from_str` functions were removed in favor of a generic
5803 `from_str` which is available in the prelude.
5804 * std: `util::unreachable` removed in favor of the `unreachable!` macro.
5805 * extra: `dlist`, the doubly-linked list was modernized.
5806 * extra: Added a `hex` module with `ToHex` and `FromHex` traits.
5807 * extra: Added `glob` module, replacing `std::os::glob`.
5808 * extra: `rope` was removed.
5809 * extra: `deque` was renamed to `ringbuf`. `RingBuf` implements `Deque`.
5810 * extra: `net`, and `timer` were removed. The experimental replacements
5811 are `std::rt::io::net` and `std::rt::io::timer`.
5812 * extra: Iterators implemented for `SmallIntMap`.
5813 * extra: Iterators implemented for `Bitv` and `BitvSet`.
5814 * extra: `SmallIntSet` removed. Use `BitvSet`.
5815 * extra: Performance of JSON parsing greatly improved.
5816 * extra: `semver` updated to SemVer 2.0.0.
5817 * extra: `term` handles more terminals correctly.
5818 * extra: `dbg` module removed.
5819 * extra: `par` module removed.
5820 * extra: `future` was cleaned up, with some method renames.
5821 * extra: Most free functions in `getopts` were converted to methods.
5824 * rustc's debug info generation (`-Z debug-info`) is greatly improved.
5825 * rustc accepts `--target-cpu` to compile to a specific CPU architecture,
5826 similarly to gcc's `--march` flag.
5827 * rustc's performance compiling small crates is much better.
5828 * rustpkg has received many improvements.
5829 * rustpkg supports git tags as package IDs.
5830 * rustpkg builds into target-specific directories so it can be used for
5832 * The number of concurrent test tasks is controlled by the environment
5833 variable RUST_TEST_TASKS.
5834 * The test harness can now report metrics for benchmarks.
5835 * All tools have man pages.
5836 * Programs compiled with `--test` now support the `-h` and `--help` flags.
5837 * The runtime uses jemalloc for allocations.
5838 * Segmented stacks are temporarily disabled as part of the transition to
5839 the new runtime. Stack overflows are possible!
5840 * A new documentation backend, rustdoc_ng, is available for use. It is
5841 still invoked through the normal `rustdoc` command.
5844 Version 0.7 (2013-07-03)
5845 =======================
5847 * ~2000 changes, numerous bugfixes
5850 * `impl`s no longer accept a visibility qualifier. Put them on methods
5852 * The borrow checker has been rewritten with flow-sensitivity, fixing
5853 many bugs and inconveniences.
5854 * The `self` parameter no longer implicitly means `&'self self`,
5855 and can be explicitly marked with a lifetime.
5856 * Overloadable compound operators (`+=`, etc.) have been temporarily
5857 removed due to bugs.
5858 * The `for` loop protocol now requires `for`-iterators to return `bool`
5859 so they compose better.
5860 * The `Durable` trait is replaced with the `'static` bounds.
5861 * Trait default methods work more often.
5862 * Structs with the `#[packed]` attribute have byte alignment and
5863 no padding between fields.
5864 * Type parameters bound by `Copy` must now be copied explicitly with
5866 * It is now illegal to move out of a dereferenced unsafe pointer.
5867 * `Option<~T>` is now represented as a nullable pointer.
5868 * `@mut` does dynamic borrow checks correctly.
5869 * The `main` function is only detected at the topmost level of the crate.
5870 The `#[main]` attribute is still valid anywhere.
5871 * Struct fields may no longer be mutable. Use inherited mutability.
5872 * The `#[no_send]` attribute makes a type that would otherwise be
5874 * The `#[no_freeze]` attribute makes a type that would otherwise be
5876 * Unbounded recursion will abort the process after reaching the limit
5877 specified by the `RUST_MAX_STACK` environment variable (default: 1GB).
5878 * The `vecs_implicitly_copyable` lint mode has been removed. Vectors
5879 are never implicitly copyable.
5880 * `#[static_assert]` makes compile-time assertions about static bools.
5881 * At long last, 'argument modes' no longer exist.
5882 * The rarely used `use mod` statement no longer exists.
5885 * `fail!` and `assert!` accept `~str`, `&'static str` or `fmt!`-style
5887 * `Encodable`, `Decodable`, `Ord`, `TotalOrd`, `TotalEq`, `DeepClone`,
5888 `Rand`, `Zero` and `ToStr` can all be automatically derived with
5890 * The `bytes!` macro returns a vector of bytes for string, u8, char,
5891 and unsuffixed integer literals.
5894 * The `core` crate was renamed to `std`.
5895 * The `std` crate was renamed to `extra`.
5896 * More and improved documentation.
5897 * std: `iterator` module for external iterator objects.
5898 * Many old-style (internal, higher-order function) iterators replaced by
5899 implementations of `Iterator`.
5900 * std: Many old internal vector and string iterators,
5901 incl. `any`, `all`. removed.
5902 * std: The `finalize` method of `Drop` renamed to `drop`.
5903 * std: The `drop` method now takes `&mut self` instead of `&self`.
5904 * std: The prelude no longer re-exports any modules, only types and traits.
5905 * std: Prelude additions: `print`, `println`, `FromStr`, `ApproxEq`, `Equiv`,
5906 `Iterator`, `IteratorUtil`, many numeric traits, many tuple traits.
5907 * std: New numeric traits: `Fractional`, `Real`, `RealExt`, `Integer`, `Ratio`,
5908 `Algebraic`, `Trigonometric`, `Exponential`, `Primitive`.
5909 * std: Tuple traits and accessors defined for up to 12-tuples, e.g.
5910 `(0, 1, 2).n2()` or `(0, 1, 2).n2_ref()`.
5911 * std: Many types implement `Clone`.
5912 * std: `path` type renamed to `Path`.
5913 * std: `mut` module and `Mut` type removed.
5914 * std: Many standalone functions removed in favor of methods and iterators
5915 in `vec`, `str`. In the future methods will also work as functions.
5916 * std: `reinterpret_cast` removed. Use `transmute`.
5917 * std: ascii string handling in `std::ascii`.
5918 * std: `Rand` is implemented for ~/@.
5919 * std: `run` module for spawning processes overhauled.
5920 * std: Various atomic types added to `unstable::atomic`.
5921 * std: Various types implement `Zero`.
5922 * std: `LinearMap` and `LinearSet` renamed to `HashMap` and `HashSet`.
5923 * std: Borrowed pointer functions moved from `ptr` to `borrow`.
5924 * std: Added `os::mkdir_recursive`.
5925 * std: Added `os::glob` function performs filesystems globs.
5926 * std: `FuzzyEq` renamed to `ApproxEq`.
5927 * std: `Map` now defines `pop` and `swap` methods.
5928 * std: `Cell` constructors converted to static methods.
5929 * extra: `rc` module adds the reference counted pointers, `Rc` and `RcMut`.
5930 * extra: `flate` module moved from `std` to `extra`.
5931 * extra: `fileinput` module for iterating over a series of files.
5932 * extra: `Complex` number type and `complex` module.
5933 * extra: `Rational` number type and `rational` module.
5934 * extra: `BigInt`, `BigUint` implement numeric and comparison traits.
5935 * extra: `term` uses terminfo now, is more correct.
5936 * extra: `arc` functions converted to methods.
5937 * extra: Implementation of fixed output size variations of SHA-2.
5940 * `unused_variable` lint mode for unused variables (default: warn).
5941 * `unused_unsafe` lint mode for detecting unnecessary `unsafe` blocks
5943 * `unused_mut` lint mode for identifying unused `mut` qualifiers
5945 * `dead_assignment` lint mode for unread variables (default: warn).
5946 * `unnecessary_allocation` lint mode detects some heap allocations that are
5947 immediately borrowed so could be written without allocating (default: warn).
5948 * `missing_doc` lint mode (default: allow).
5949 * `unreachable_code` lint mode (default: warn).
5950 * The `rusti` command has been rewritten and a number of bugs addressed.
5951 * rustc outputs in color on more terminals.
5952 * rustc accepts a `--link-args` flag to pass arguments to the linker.
5953 * rustc accepts a `-Z print-link-args` flag for debugging linkage.
5954 * Compiling with `-g` will make the binary record information about
5955 dynamic borrowcheck failures for debugging.
5956 * rustdoc has a nicer stylesheet.
5957 * Various improvements to rustdoc.
5958 * Improvements to rustpkg (see the detailed release notes).
5961 Version 0.6 (2013-04-03)
5962 ========================
5964 * ~2100 changes, numerous bugfixes
5967 * The self type parameter in traits is now spelled `Self`
5968 * The `self` parameter in trait and impl methods must now be explicitly
5969 named (for example: `fn f(&self) { }`). Implicit self is deprecated.
5970 * Static methods no longer require the `static` keyword and instead
5971 are distinguished by the lack of a `self` parameter
5972 * Replaced the `Durable` trait with the `'static` lifetime
5973 * The old closure type syntax with the trailing sigil has been
5974 removed in favor of the more consistent leading sigil
5975 * `super` is a keyword, and may be prefixed to paths
5976 * Trait bounds are separated with `+` instead of whitespace
5977 * Traits are implemented with `impl Trait for Type`
5978 instead of `impl Type: Trait`
5979 * Lifetime syntax is now `&'l foo` instead of `&l/foo`
5980 * The `export` keyword has finally been removed
5981 * The `move` keyword has been removed (see "Semantic changes")
5982 * The interior mutability qualifier on vectors, `[mut T]`, has been
5983 removed. Use `&mut [T]`, etc.
5984 * `mut` is no longer valid in `~mut T`. Use inherited mutability
5985 * `fail` is no longer a keyword. Use `fail!()`
5986 * `assert` is no longer a keyword. Use `assert!()`
5987 * `log` is no longer a keyword. use `debug!`, etc.
5988 * 1-tuples may be represented as `(T,)`
5989 * Struct fields may no longer be `mut`. Use inherited mutability,
5990 `@mut T`, `core::mut` or `core::cell`
5991 * `extern mod { ... }` is no longer valid syntax for foreign
5992 function modules. Use extern blocks: `extern { ... }`
5993 * Newtype enums removed. Use tuple-structs.
5994 * Trait implementations no longer support visibility modifiers
5995 * Pattern matching over vectors improved and expanded
5996 * `const` renamed to `static` to correspond to lifetime name,
5997 and make room for future `static mut` unsafe mutable globals.
5998 * Replaced `#[deriving_eq]` with `#[deriving(Eq)]`, etc.
5999 * `Clone` implementations can be automatically generated with
6000 `#[deriving(Clone)]`
6001 * Casts to traits must use a pointer sigil, e.g. `@foo as @Bar`
6002 instead of `foo as Bar`.
6003 * Fixed length vector types are now written as `[int, .. 3]`
6004 instead of `[int * 3]`.
6005 * Fixed length vector types can express the length as a constant
6006 expression. (ex: `[int, .. GL_BUFFER_SIZE - 2]`)
6009 * Types with owned pointers or custom destructors move by default,
6010 eliminating the `move` keyword
6011 * All foreign functions are considered unsafe
6012 * &mut is now unaliasable
6013 * Writes to borrowed @mut pointers are prevented dynamically
6015 * The name of the main function can be customized using #[main]
6016 * The default type of an inferred closure is &fn instead of @fn
6017 * `use` statements may no longer be "chained" - they cannot import
6018 identifiers imported by previous `use` statements
6019 * `use` statements are crate relative, importing from the "top"
6020 of the crate by default. Paths may be prefixed with `super::`
6021 or `self::` to change the search behavior.
6022 * Method visibility is inherited from the implementation declaration
6023 * Structural records have been removed
6024 * Many more types can be used in static items, including enums
6025 'static-lifetime pointers and vectors
6026 * Pattern matching over vectors improved and expanded
6027 * Typechecking of closure types has been overhauled to
6028 improve inference and eliminate unsoundness
6029 * Macros leave scope at the end of modules, unless that module is
6030 tagged with #[macro_escape]
6033 * Added big integers to `std::bigint`
6034 * Removed `core::oldcomm` module
6035 * Added pipe-based `core::comm` module
6036 * Numeric traits have been reorganized under `core::num`
6037 * `vec::slice` finally returns a slice
6038 * `debug!` and friends don't require a format string, e.g. `debug!(Foo)`
6039 * Containers reorganized around traits in `core::container`
6040 * `core::dvec` removed, `~[T]` is a drop-in replacement
6041 * `core::send_map` renamed to `core::hashmap`
6042 * `std::map` removed; replaced with `core::hashmap`
6043 * `std::treemap` reimplemented as an owned balanced tree
6044 * `std::deque` and `std::smallintmap` reimplemented as owned containers
6045 * `core::trie` added as a fast ordered map for integer keys
6046 * Set types added to `core::hashmap`, `core::trie` and `std::treemap`
6047 * `Ord` split into `Ord` and `TotalOrd`. `Ord` is still used to
6048 overload the comparison operators, whereas `TotalOrd` is used
6049 by certain container types
6052 * Replaced the 'cargo' package manager with 'rustpkg'
6053 * Added all-purpose 'rust' tool
6054 * `rustc --test` now supports benchmarks with the `#[bench]` attribute
6055 * rustc now *attempts* to offer spelling suggestions
6056 * Improved support for ARM and Android
6057 * Preliminary MIPS backend
6058 * Improved foreign function ABI implementation for x86, x86_64
6059 * Various memory usage improvements
6060 * Rust code may be embedded in foreign code under limited circumstances
6061 * Inline assembler supported by new asm!() syntax extension.
6064 Version 0.5 (2012-12-21)
6065 ===========================
6067 * ~900 changes, numerous bugfixes
6070 * Removed `<-` move operator
6071 * Completed the transition from the `#fmt` extension syntax to `fmt!`
6072 * Removed old fixed length vector syntax - `[T]/N`
6073 * New token-based quasi-quoters, `quote_tokens!`, `quote_expr!`, etc.
6074 * Macros may now expand to items and statements
6075 * `a.b()` is always parsed as a method call, never as a field projection
6076 * `Eq` and `IterBytes` implementations can be automatically generated
6077 with `#[deriving_eq]` and `#[deriving_iter_bytes]` respectively
6078 * Removed the special crate language for `.rc` files
6079 * Function arguments may consist of any irrefutable pattern
6082 * `&` and `~` pointers may point to objects
6083 * Tuple structs - `struct Foo(Bar, Baz)`. Will replace newtype enums.
6084 * Enum variants may be structs
6085 * Destructors can be added to all nominal types with the Drop trait
6086 * Structs and nullary enum variants may be constants
6087 * Values that cannot be implicitly copied are now automatically moved
6088 without writing `move` explicitly
6089 * `&T` may now be coerced to `*T`
6090 * Coercions happen in `let` statements as well as function calls
6091 * `use` statements now take crate-relative paths
6092 * The module and type namespaces have been merged so that static
6093 method names can be resolved under the trait in which they are
6096 * Improved support for language features
6097 * Trait inheritance works in many scenarios
6098 * More support for explicit self arguments in methods - `self`, `&self`
6099 `@self`, and `~self` all generally work as expected
6100 * Static methods work in more situations
6101 * Experimental: Traits may declare default methods for the implementations
6105 * New condition handling system in `core::condition`
6106 * Timsort added to `std::sort`
6107 * New priority queue, `std::priority_queue`
6108 * Pipes for serializable types, `std::flatpipes'
6109 * Serialization overhauled to be trait-based
6110 * Expanded `getopts` definitions
6111 * Moved futures to `std`
6112 * More functions are pure now
6113 * `core::comm` renamed to `oldcomm`. Still deprecated
6114 * `rustdoc` and `cargo` are libraries now
6117 * Added a preliminary REPL, `rusti`
6118 * License changed from MIT to dual MIT/APL2
6121 Version 0.4 (2012-10-15)
6122 ==========================
6124 * ~2000 changes, numerous bugfixes
6127 * All keywords are now strict and may not be used as identifiers anywhere
6128 * Keyword removal: 'again', 'import', 'check', 'new', 'owned', 'send',
6129 'of', 'with', 'to', 'class'.
6130 * Classes are replaced with simpler structs
6131 * Explicit method self types
6132 * `ret` became `return` and `alt` became `match`
6133 * `import` is now `use`; `use is now `extern mod`
6134 * `extern mod { ... }` is now `extern { ... }`
6135 * `use mod` is the recommended way to import modules
6136 * `pub` and `priv` replace deprecated export lists
6137 * The syntax of `match` pattern arms now uses fat arrow (=>)
6138 * `main` no longer accepts an args vector; use `os::args` instead
6141 * Trait implementations are now coherent, ala Haskell typeclasses
6142 * Trait methods may be static
6143 * Argument modes are deprecated
6144 * Borrowed pointers are much more mature and recommended for use
6145 * Strings and vectors in the static region are stored in constant memory
6146 * Typestate was removed
6147 * Resolution rewritten to be more reliable
6148 * Support for 'dual-mode' data structures (freezing and thawing)
6151 * Most binary operators can now be overloaded via the traits in
6153 * `std::net::url` for representing URLs
6154 * Sendable hash maps in `core::send_map`
6155 * `core::task' gained a (currently unsafe) task-local storage API
6158 * An efficient new intertask communication primitive called the pipe,
6159 along with a number of higher-level channel types, in `core::pipes`
6160 * `std::arc`, an atomically reference counted, immutable, shared memory
6162 * `std::sync`, various exotic synchronization tools based on arcs and pipes
6163 * Futures are now based on pipes and sendable
6164 * More robust linked task failure
6165 * Improved task builder API
6168 * Improved error reporting
6169 * Preliminary JIT support
6170 * Preliminary work on precise GC
6171 * Extensive architectural improvements to rustc
6172 * Begun a transition away from buggy C++-based reflection (shape) code to
6173 Rust-based (visitor) code
6174 * All hash functions and tables converted to secure, randomized SipHash
6177 Version 0.3 (2012-07-12)
6178 ========================
6180 * ~1900 changes, numerous bugfixes
6182 * New coding conveniences
6183 * Integer-literal suffix inference
6184 * Per-item control over warnings, errors
6185 * #[cfg(windows)] and #[cfg(unix)] attributes
6186 * Documentation comments
6187 * More compact closure syntax
6188 * 'do' expressions for treating higher-order functions as
6190 * *-patterns (wildcard extended to all constructor fields)
6193 * Name resolution pass and exhaustiveness checker rewritten
6194 * Region pointers and borrow checking supersede alias
6196 * Init-ness checking is now provided by a region-based liveness
6197 pass instead of the typestate pass; same for last-use analysis
6198 * Extensive work on region pointers
6200 * Experimental new language features
6201 * Slices and fixed-size, interior-allocated vectors
6202 * #!-comments for lang versioning, shell execution
6203 * Destructors and iface implementation for classes;
6204 type-parameterized classes and class methods
6205 * 'const' type kind for types that can be used to implement
6206 shared-memory concurrency patterns
6210 * Removal of various obsolete features
6211 * Keywords: 'be', 'prove', 'syntax', 'note', 'mutable', 'bind',
6212 'crust', 'native' (now 'extern'), 'cont' (now 'again')
6214 * Constructs: do-while loops ('do' repurposed), fn binding,
6215 resources (replaced by destructors)
6217 * Compiler reorganization
6218 * Syntax-layer of compiler split into separate crate
6219 * Clang (from LLVM project) integrated into build
6220 * Typechecker split into sub-modules
6223 * New time functions
6224 * Extension methods for many built-in types
6225 * Arc: atomic-refcount read-only / exclusive-use shared cells
6226 * Par: parallel map and search routines
6227 * Extensive work on libuv interface
6228 * Much vector code moved to libraries
6229 * Syntax extensions: #line, #col, #file, #mod, #stringify,
6230 #include, #include_str, #include_bin
6233 * Cargo automatically resolves dependencies
6236 Version 0.2 (2012-03-29)
6237 =========================
6239 * >1500 changes, numerous bugfixes
6241 * New docs and doc tooling
6243 * New port: FreeBSD x86_64
6245 * Compilation model enhancements
6246 * Generics now specialized, multiply instantiated
6247 * Functions now inlined across separate crates
6249 * Scheduling, stack and threading fixes
6250 * Noticeably improved message-passing performance
6251 * Explicit schedulers
6255 * Experimental new language features
6256 * Operator overloading
6260 * Various language extensions
6261 * C-callback function types: 'crust fn ...'
6262 * Infinite-loop construct: 'loop { ... }'
6263 * Shorten 'mutable' to 'mut'
6264 * Required mutable-local qualifier: 'let mut ...'
6265 * Basic glob-exporting: 'export foo::*;'
6266 * Alt now exhaustive, 'alt check' for runtime-checked
6267 * Block-function form of 'for' loop, with 'break' and 'ret'.
6270 * AST quasi-quote syntax extension
6271 * Revived libuv interface
6272 * New modules: core::{future, iter}, std::arena
6273 * Merged per-platform std::{os*, fs*} to core::{libc, os}
6274 * Extensive cleanup, regularization in libstd, libcore
6277 Version 0.1 (2012-01-20)
6278 ===============================
6280 * Most language features work, including:
6281 * Unique pointers, unique closures, move semantics
6282 * Interface-constrained generics
6283 * Static interface dispatch
6285 * Multithread task scheduling
6286 * Typestate predicates
6287 * Failure unwinding, destructors
6288 * Pattern matching and destructuring assignment
6289 * Lightweight block-lambda syntax
6290 * Preliminary macro-by-example
6292 * Compiler works with the following configurations:
6293 * Linux: x86 and x86_64 hosts and targets
6294 * macOS: x86 and x86_64 hosts and targets
6295 * Windows: x86 hosts and targets
6297 * Cross compilation / multi-target configuration supported.
6299 * Preliminary API-documentation and package-management tools included.
6303 * Documentation is incomplete.
6305 * Performance is below intended target.
6307 * Standard library APIs are subject to extensive change, reorganization.
6309 * Language-level versioning is not yet operational - future code will