1 Version 1.23.0 (2018-01-04)
2 ==========================
6 - [Arbitrary `auto` traits are now permitted in trait objects.][45772]
7 - [rustc now uses subtyping on the left hand side of binary operations.][45435]
8 Which should fix some confusing errors in some operations.
12 - [Enabled `TrapUnreachable` in LLVM which should mitigate the impact of
13 undefined behaviour.][45920]
14 - [rustc now suggests renaming import if names clash.][45660]
15 - [Display errors/warnings correctly when there are zero-width or
16 wide characters.][45711]
17 - [rustc now avoids unnecessary copies of arguments that are
18 simple bindings][45380] This should improve memory usage on average by 5-10%.
19 - [Updated musl used to build musl rustc to 1.1.17][45393]
23 - [Allow a trailing comma in `assert_eq/ne` macro][45887]
24 - [Implement Hash for raw pointers to unsized types][45483]
25 - [impl `From<*mut T>` for `AtomicPtr<T>`][45610]
26 - [impl `From<usize/isize>` for `AtomicUsize/AtomicIsize`.][45610]
27 - [Removed the `T: Sync` requirement for `RwLock<T>: Send`][45267]
28 - [Removed `T: Sized` requirement for `{<*const T>, <*mut T>}::as_ref`
29 and `<*mut T>::as_mut`][44932]
30 - [Optimized `Thread::{park, unpark}` implementation][45524]
31 - [Improved `SliceExt::binary_search` performance.][45333]
32 - [impl `FromIterator<()>` for `()`][45379]
33 - [Copied `AsciiExt` trait methods to primitive types.][44042] Use of `AsciiExt`
41 - [Cargo now supports uninstallation of multiple packages][cargo/4561]
42 eg. `cargo uninstall foo bar` uninstalls `foo` and `bar`.
43 - [Added unit test checking to `cargo check`][cargo/4592]
44 - [Cargo now lets you install a specific version
45 using `cargo install --version`][cargo/4637]
49 - [Releases now ship with the Cargo book documentation.][45692]
50 - [rustdoc now prints rendering warnings on every run.][45324]
54 - [Changes have been made to type equality to make it more correct,
55 in rare cases this could break some code.][45853] [Tracking issue for
56 further information][45852]
57 - [`char::escape_debug` now uses Unicode 10 over 9.][45571]
58 - [Upgraded Android SDK to 27, and NDK to r15c.][45580] This drops support for
59 Android 9, the minimum supported version is Android 14.
60 - [Bumped the minimum LLVM to 3.9][45326]
62 [44042]: https://github.com/rust-lang/rust/pull/44042
63 [44932]: https://github.com/rust-lang/rust/pull/44932
64 [45267]: https://github.com/rust-lang/rust/pull/45267
65 [45324]: https://github.com/rust-lang/rust/pull/45324
66 [45326]: https://github.com/rust-lang/rust/pull/45326
67 [45333]: https://github.com/rust-lang/rust/pull/45333
68 [45379]: https://github.com/rust-lang/rust/pull/45379
69 [45380]: https://github.com/rust-lang/rust/pull/45380
70 [45393]: https://github.com/rust-lang/rust/pull/45393
71 [45435]: https://github.com/rust-lang/rust/pull/45435
72 [45483]: https://github.com/rust-lang/rust/pull/45483
73 [45524]: https://github.com/rust-lang/rust/pull/45524
74 [45571]: https://github.com/rust-lang/rust/pull/45571
75 [45580]: https://github.com/rust-lang/rust/pull/45580
76 [45610]: https://github.com/rust-lang/rust/pull/45610
77 [45660]: https://github.com/rust-lang/rust/pull/45660
78 [45692]: https://github.com/rust-lang/rust/pull/45692
79 [45711]: https://github.com/rust-lang/rust/pull/45711
80 [45772]: https://github.com/rust-lang/rust/pull/45772
81 [45852]: https://github.com/rust-lang/rust/issues/45852
82 [45853]: https://github.com/rust-lang/rust/pull/45853
83 [45887]: https://github.com/rust-lang/rust/pull/45887
84 [45920]: https://github.com/rust-lang/rust/pull/45920
85 [cargo/4561]: https://github.com/rust-lang/cargo/pull/4561
86 [cargo/4592]: https://github.com/rust-lang/cargo/pull/4592
87 [cargo/4637]: https://github.com/rust-lang/cargo/pull/4637
90 Version 1.22.1 (2017-11-22)
91 ==========================
93 - [Update Cargo to fix an issue with macOS 10.13 "High Sierra"][46183]
95 [46183]: https://github.com/rust-lang/rust/pull/46183
97 Version 1.22.0 (2017-11-22)
98 ==========================
102 - [`non_snake_case` lint now allows extern no-mangle functions][44966]
103 - [Now accepts underscores in unicode escapes][43716]
104 - [`T op= &T` now works for numeric types.][44287] eg. `let mut x = 2; x += &8;`
105 - [types that impl `Drop` are now allowed in `const` and `static` types][44456]
109 - [rustc now defaults to having 16 codegen units at debug on supported platforms.][45064]
110 - [rustc will no longer inline in codegen units when compiling for debug][45075]
111 This should decrease compile times for debug builds.
112 - [strict memory alignment now enabled on ARMv6][45094]
113 - [Remove support for the PNaCl target `le32-unknown-nacl`][45041]
117 - [Allow atomic operations up to 32 bits
118 on `armv5te_unknown_linux_gnueabi`][44978]
119 - [`Box<Error>` now impls `From<Cow<str>>`][44466]
120 - [`std::mem::Discriminant` is now guaranteed to be `Send + Sync`][45095]
121 - [`fs::copy` now returns the length of the main stream on NTFS.][44895]
122 - [Properly detect overflow in `Instant += Duration`.][44220]
123 - [impl `Hasher` for `{&mut Hasher, Box<Hasher>}`][44015]
124 - [impl `fmt::Debug` for `SplitWhitespace`.][44303]
125 - [`Option<T>` now impls `Try`][42526] This allows for using `?` with `Option` types.
132 - [Cargo will now build multi file examples in subdirectories of the `examples`
133 folder that have a `main.rs` file.][cargo/4496]
134 - [Changed `[root]` to `[package]` in `Cargo.lock`][cargo/4571] Packages with
135 the old format will continue to work and can be updated with `cargo update`.
136 - [Now supports vendoring git repositories][cargo/3992]
140 - [`libbacktrace` is now available on Apple platforms.][44251]
141 - [Stabilised the `compile_fail` attribute for code fences in doc-comments.][43949]
142 This now lets you specify that a given code example will fail to compile.
146 - [The minimum Android version that rustc can build for has been bumped
147 to `4.0` from `2.3`][45656]
148 - [Allowing `T op= &T` for numeric types has broken some type
149 inference cases][45480]
152 [42526]: https://github.com/rust-lang/rust/pull/42526
153 [43017]: https://github.com/rust-lang/rust/pull/43017
154 [43716]: https://github.com/rust-lang/rust/pull/43716
155 [43949]: https://github.com/rust-lang/rust/pull/43949
156 [44015]: https://github.com/rust-lang/rust/pull/44015
157 [44220]: https://github.com/rust-lang/rust/pull/44220
158 [44251]: https://github.com/rust-lang/rust/pull/44251
159 [44287]: https://github.com/rust-lang/rust/pull/44287
160 [44303]: https://github.com/rust-lang/rust/pull/44303
161 [44456]: https://github.com/rust-lang/rust/pull/44456
162 [44466]: https://github.com/rust-lang/rust/pull/44466
163 [44895]: https://github.com/rust-lang/rust/pull/44895
164 [44966]: https://github.com/rust-lang/rust/pull/44966
165 [44978]: https://github.com/rust-lang/rust/pull/44978
166 [45041]: https://github.com/rust-lang/rust/pull/45041
167 [45064]: https://github.com/rust-lang/rust/pull/45064
168 [45075]: https://github.com/rust-lang/rust/pull/45075
169 [45094]: https://github.com/rust-lang/rust/pull/45094
170 [45095]: https://github.com/rust-lang/rust/pull/45095
171 [45480]: https://github.com/rust-lang/rust/issues/45480
172 [45656]: https://github.com/rust-lang/rust/pull/45656
173 [cargo/3992]: https://github.com/rust-lang/cargo/pull/3992
174 [cargo/4496]: https://github.com/rust-lang/cargo/pull/4496
175 [cargo/4571]: https://github.com/rust-lang/cargo/pull/4571
182 Version 1.21.0 (2017-10-12)
183 ==========================
187 - [You can now use static references for literals.][43838]
191 let x: &'static u32 = &0;
194 - [Relaxed path syntax. Optional `::` before `<` is now allowed in all contexts.][43540]
197 my_macro!(Vec<i32>::new); // Always worked
198 my_macro!(Vec::<i32>::new); // Now works
203 - [Upgraded jemalloc to 4.5.0][43911]
204 - [Enabled unwinding panics on Redox][43917]
205 - [Now runs LLVM in parallel during translation phase.][43506]
206 This should reduce peak memory usage.
210 - [Generate builtin impls for `Clone` for all arrays and tuples that
211 are `T: Clone`][43690]
212 - [`Stdin`, `Stdout`, and `Stderr` now implement `AsRawFd`.][43459]
213 - [`Rc` and `Arc` now implement `From<&[T]> where T: Clone`, `From<str>`,
214 `From<String>`, `From<Box<T>> where T: ?Sized`, and `From<Vec<T>>`.][42565]
219 [`std::mem::discriminant`]
223 - [You can now call `cargo install` with multiple package names][cargo/4216]
224 - [Cargo commands inside a virtual workspace will now implicitly
225 pass `--all`][cargo/4335]
226 - [Added a `[patch]` section to `Cargo.toml` to handle
227 prepublication dependencies][cargo/4123] [RFC 1969]
228 - [`include` & `exclude` fields in `Cargo.toml` now accept gitignore
229 like patterns][cargo/4270]
230 - [Added the `--all-targets` option][cargo/4400]
231 - [Using required dependencies as a feature is now deprecated and emits
232 a warning][cargo/4364]
237 - [Cargo docs are moving][43916]
238 to [doc.rust-lang.org/cargo](https://doc.rust-lang.org/cargo)
239 - [The rustdoc book is now available][43863]
240 at [doc.rust-lang.org/rustdoc](https://doc.rust-lang.org/rustdoc)
241 - [Added a preview of RLS has been made available through rustup][44204]
242 Install with `rustup component add rls-preview`
243 - [`std::os` documentation for Unix, Linux, and Windows now appears on doc.rust-lang.org][43348]
244 Previously only showed `std::os::unix`.
248 - [Changes in method matching against higher-ranked types][43880] This may cause
249 breakage in subtyping corner cases. [A more in-depth explanation is available.][info/43880]
250 - [rustc's JSON error output's byte position start at top of file.][42973]
251 Was previously relative to the rustc's internal `CodeMap` struct which
252 required the unstable library `libsyntax` to correctly use.
253 - [`unused_results` lint no longer ignores booleans][43728]
255 [42565]: https://github.com/rust-lang/rust/pull/42565
256 [42973]: https://github.com/rust-lang/rust/pull/42973
257 [43348]: https://github.com/rust-lang/rust/pull/43348
258 [43459]: https://github.com/rust-lang/rust/pull/43459
259 [43506]: https://github.com/rust-lang/rust/pull/43506
260 [43540]: https://github.com/rust-lang/rust/pull/43540
261 [43690]: https://github.com/rust-lang/rust/pull/43690
262 [43728]: https://github.com/rust-lang/rust/pull/43728
263 [43838]: https://github.com/rust-lang/rust/pull/43838
264 [43863]: https://github.com/rust-lang/rust/pull/43863
265 [43880]: https://github.com/rust-lang/rust/pull/43880
266 [43911]: https://github.com/rust-lang/rust/pull/43911
267 [43916]: https://github.com/rust-lang/rust/pull/43916
268 [43917]: https://github.com/rust-lang/rust/pull/43917
269 [44204]: https://github.com/rust-lang/rust/pull/44204
270 [cargo/4123]: https://github.com/rust-lang/cargo/pull/4123
271 [cargo/4216]: https://github.com/rust-lang/cargo/pull/4216
272 [cargo/4270]: https://github.com/rust-lang/cargo/pull/4270
273 [cargo/4335]: https://github.com/rust-lang/cargo/pull/4335
274 [cargo/4364]: https://github.com/rust-lang/cargo/pull/4364
275 [cargo/4400]: https://github.com/rust-lang/cargo/pull/4400
276 [RFC 1969]: https://github.com/rust-lang/rfcs/pull/1969
277 [info/43880]: https://github.com/rust-lang/rust/issues/44224#issuecomment-330058902
278 [`std::mem::discriminant`]: https://doc.rust-lang.org/std/mem/fn.discriminant.html
280 Version 1.20.0 (2017-08-31)
281 ===========================
285 - [Associated constants are now stabilised.][42809]
286 - [A lot of macro bugs are now fixed.][42913]
291 - [Struct fields are now properly coerced to the expected field type.][42807]
292 - [Enabled wasm LLVM backend][42571] WASM can now be built with the
293 `wasm32-experimental-emscripten` target.
294 - [Changed some of the error messages to be more helpful.][42033]
295 - [Add support for RELRO(RELocation Read-Only) for platforms that support
297 - [rustc now reports the total number of errors on compilation failure][43015]
298 previously this was only the number of errors in the pass that failed.
299 - [Expansion in rustc has been sped up 29x.][42533]
300 - [added `msp430-none-elf` target.][43099]
301 - [rustc will now suggest one-argument enum variant to fix type mismatch when
303 - [Fixes backtraces on Redox][43228]
304 - [rustc now identifies different versions of same crate when absolute paths of
305 different types match in an error message.][42826]
311 - [Relaxed Debug constraints on `{HashMap,BTreeMap}::{Keys,Values}`.][42854]
312 - [Impl `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Debug`, `Hash` for unsized
314 - [Impl `fmt::{Display, Debug}` for `Ref`, `RefMut`, `MutexGuard`,
315 `RwLockReadGuard`, `RwLockWriteGuard`][42822]
316 - [Impl `Clone` for `DefaultHasher`.][42799]
317 - [Impl `Sync` for `SyncSender`.][42397]
318 - [Impl `FromStr` for `char`][42271]
319 - [Fixed how `{f32, f64}::{is_sign_negative, is_sign_positive}` handles
321 - [allow messages in the `unimplemented!()` macro.][42155]
322 ie. `unimplemented!("Waiting for 1.21 to be stable")`
323 - [`pub(restricted)` is now supported in the `thread_local!` macro.][43185]
324 - [Upgrade to Unicode 10.0.0][42999]
325 - [Reimplemented `{f32, f64}::{min, max}` in Rust instead of using CMath.][42430]
326 - [Skip the main thread's manual stack guard on Linux][43072]
327 - [Iterator::nth for `ops::{Range, RangeFrom}` is now done in O(1) time][43077]
328 - [`#[repr(align(N))]` attribute max number is now 2^31 - 1.][43097] This was
330 - [`{OsStr, Path}::Display` now avoids allocations where possible][42613]
335 - [`CStr::into_c_string`]
336 - [`CString::as_c_str`]
337 - [`CString::into_boxed_c_str`]
340 - [`Chain::into_inner`]
341 - [`Option::get_or_insert_with`]
342 - [`Option::get_or_insert`]
343 - [`OsStr::into_os_string`]
344 - [`OsString::into_boxed_os_str`]
347 - [`Utf8Error::error_len`]
348 - [`char::EscapeDebug`]
349 - [`char::escape_debug`]
355 - [`mem::ManuallyDrop`]
356 - [`slice::sort_unstable_by_key`]
357 - [`slice::sort_unstable_by`]
358 - [`slice::sort_unstable`]
359 - [`str::from_boxed_utf8_unchecked`]
360 - [`str::as_bytes_mut`]
361 - [`str::as_bytes_mut`]
362 - [`str::from_utf8_mut`]
363 - [`str::from_utf8_unchecked_mut`]
365 - [`str::get_unchecked_mut`]
366 - [`str::get_unchecked`]
368 - [`str::into_boxed_bytes`]
373 - [Cargo API token location moved from `~/.cargo/config` to
374 `~/.cargo/credentials`.][cargo/3978]
375 - [Cargo will now build `main.rs` binaries that are in sub-directories of
376 `src/bin`.][cargo/4214] ie. Having `src/bin/server/main.rs` and
377 `src/bin/client/main.rs` generates `target/debug/server` and `target/debug/client`
378 - [You can now specify version of a binary when installed through
379 `cargo install` using `--vers`.][cargo/4229]
380 - [Added `--no-fail-fast` flag to cargo to run all benchmarks regardless of
381 failure.][cargo/4248]
382 - [Changed the convention around which file is the crate root.][cargo/4259]
383 - [The `include`/`exclude` property in `Cargo.toml` now accepts gitignore paths
384 instead of glob patterns][cargo/4270]. Glob patterns are now deprecated.
389 - [Functions with `'static` in their return types will now not be as usable as
390 if they were using lifetime parameters instead.][42417]
391 - [The reimplementation of `{f32, f64}::is_sign_{negative, positive}` now
392 takes the sign of NaN into account where previously didn't.][42430]
394 [42033]: https://github.com/rust-lang/rust/pull/42033
395 [42155]: https://github.com/rust-lang/rust/pull/42155
396 [42271]: https://github.com/rust-lang/rust/pull/42271
397 [42397]: https://github.com/rust-lang/rust/pull/42397
398 [42417]: https://github.com/rust-lang/rust/pull/42417
399 [42430]: https://github.com/rust-lang/rust/pull/42430
400 [42431]: https://github.com/rust-lang/rust/pull/42431
401 [42533]: https://github.com/rust-lang/rust/pull/42533
402 [42571]: https://github.com/rust-lang/rust/pull/42571
403 [42613]: https://github.com/rust-lang/rust/pull/42613
404 [42799]: https://github.com/rust-lang/rust/pull/42799
405 [42807]: https://github.com/rust-lang/rust/pull/42807
406 [42809]: https://github.com/rust-lang/rust/pull/42809
407 [42822]: https://github.com/rust-lang/rust/pull/42822
408 [42826]: https://github.com/rust-lang/rust/pull/42826
409 [42854]: https://github.com/rust-lang/rust/pull/42854
410 [42913]: https://github.com/rust-lang/rust/pull/42913
411 [42999]: https://github.com/rust-lang/rust/pull/42999
412 [43011]: https://github.com/rust-lang/rust/pull/43011
413 [43015]: https://github.com/rust-lang/rust/pull/43015
414 [43072]: https://github.com/rust-lang/rust/pull/43072
415 [43077]: https://github.com/rust-lang/rust/pull/43077
416 [43097]: https://github.com/rust-lang/rust/pull/43097
417 [43099]: https://github.com/rust-lang/rust/pull/43099
418 [43170]: https://github.com/rust-lang/rust/pull/43170
419 [43178]: https://github.com/rust-lang/rust/pull/43178
420 [43185]: https://github.com/rust-lang/rust/pull/43185
421 [43228]: https://github.com/rust-lang/rust/pull/43228
422 [cargo/3978]: https://github.com/rust-lang/cargo/pull/3978
423 [cargo/4214]: https://github.com/rust-lang/cargo/pull/4214
424 [cargo/4229]: https://github.com/rust-lang/cargo/pull/4229
425 [cargo/4248]: https://github.com/rust-lang/cargo/pull/4248
426 [cargo/4259]: https://github.com/rust-lang/cargo/pull/4259
427 [cargo/4270]: https://github.com/rust-lang/cargo/pull/4270
428 [`CStr::into_c_string`]: https://doc.rust-lang.org/std/ffi/struct.CStr.html#method.into_c_string
429 [`CString::as_c_str`]: https://doc.rust-lang.org/std/ffi/struct.CString.html#method.as_c_str
430 [`CString::into_boxed_c_str`]: https://doc.rust-lang.org/std/ffi/struct.CString.html#method.into_boxed_c_str
431 [`Chain::get_mut`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.get_mut
432 [`Chain::get_ref`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.get_ref
433 [`Chain::into_inner`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.into_inner
434 [`Option::get_or_insert_with`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.get_or_insert_with
435 [`Option::get_or_insert`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.get_or_insert
436 [`OsStr::into_os_string`]: https://doc.rust-lang.org/std/ffi/struct.OsStr.html#method.into_os_string
437 [`OsString::into_boxed_os_str`]: https://doc.rust-lang.org/std/ffi/struct.OsString.html#method.into_boxed_os_str
438 [`Take::get_mut`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.get_mut
439 [`Take::get_ref`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.get_ref
440 [`Utf8Error::error_len`]: https://doc.rust-lang.org/std/str/struct.Utf8Error.html#method.error_len
441 [`char::EscapeDebug`]: https://doc.rust-lang.org/std/char/struct.EscapeDebug.html
442 [`char::escape_debug`]: https://doc.rust-lang.org/std/primitive.char.html#method.escape_debug
443 [`compile_error!`]: https://doc.rust-lang.org/std/macro.compile_error.html
444 [`f32::from_bits`]: https://doc.rust-lang.org/std/primitive.f32.html#method.from_bits
445 [`f32::to_bits`]: https://doc.rust-lang.org/std/primitive.f32.html#method.to_bits
446 [`f64::from_bits`]: https://doc.rust-lang.org/std/primitive.f64.html#method.from_bits
447 [`f64::to_bits`]: https://doc.rust-lang.org/std/primitive.f64.html#method.to_bits
448 [`mem::ManuallyDrop`]: https://doc.rust-lang.org/std/mem/union.ManuallyDrop.html
449 [`slice::sort_unstable_by_key`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable_by_key
450 [`slice::sort_unstable_by`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable_by
451 [`slice::sort_unstable`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable
452 [`str::from_boxed_utf8_unchecked`]: https://doc.rust-lang.org/std/str/fn.from_boxed_utf8_unchecked.html
453 [`str::as_bytes_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.as_bytes_mut
454 [`str::from_utf8_mut`]: https://doc.rust-lang.org/std/str/fn.from_utf8_mut.html
455 [`str::from_utf8_unchecked_mut`]: https://doc.rust-lang.org/std/str/fn.from_utf8_unchecked_mut.html
456 [`str::get_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_mut
457 [`str::get_unchecked_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_unchecked_mut
458 [`str::get_unchecked`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_unchecked
459 [`str::get`]: https://doc.rust-lang.org/std/primitive.str.html#method.get
460 [`str::into_boxed_bytes`]: https://doc.rust-lang.org/std/primitive.str.html#method.into_boxed_bytes
463 Version 1.19.0 (2017-07-20)
464 ===========================
469 - [Numeric fields can now be used for creating tuple structs.][41145] [RFC 1506]
470 For example `struct Point(u32, u32); let x = Point { 0: 7, 1: 0 };`.
471 - [Macro recursion limit increased to 1024 from 64.][41676]
472 - [Added lint for detecting unused macros.][41907]
473 - [`loop` can now return a value with `break`.][42016] [RFC 1624]
474 For example: `let x = loop { break 7; };`
475 - [C compatible `union`s are now available.][42068] [RFC 1444] They can only
476 contain `Copy` types and cannot have a `Drop` implementation.
477 Example: `union Foo { bar: u8, baz: usize }`
478 - [Non capturing closures can now be coerced into `fn`s,][42162] [RFC 1558]
479 Example: `let foo: fn(u8) -> u8 = |v: u8| { v };`
484 - [Add support for bootstrapping the Rust compiler toolchain on Android.][41370]
485 - [Change `arm-linux-androideabi` to correspond to the `armeabi`
486 official ABI.][41656] If you wish to continue targeting the `armeabi-v7a` ABI
487 you should use `--target armv7-linux-androideabi`.
488 - [Fixed ICE when removing a source file between compilation sessions.][41873]
489 - [Minor optimisation of string operations.][42037]
490 - [Compiler error message is now `aborting due to previous error(s)` instead of
491 `aborting due to N previous errors`][42150] This was previously inaccurate and
492 would only count certain kinds of errors.
493 - [The compiler now supports Visual Studio 2017][42225]
494 - [The compiler is now built against LLVM 4.0.1 by default][42948]
495 - [Added a lot][42264] of [new error codes][42302]
496 - [Added `target-feature=+crt-static` option][37406] [RFC 1721] Which allows
497 libraries with C Run-time Libraries(CRT) to be statically linked.
498 - [Fixed various ARM codegen bugs][42740]
503 - [`String` now implements `FromIterator<Cow<'a, str>>` and
504 `Extend<Cow<'a, str>>`][41449]
505 - [`Vec` now implements `From<&mut [T]>`][41530]
506 - [`Box<[u8]>` now implements `From<Box<str>>`][41258]
507 - [`SplitWhitespace` now implements `Clone`][41659]
508 - [`[u8]::reverse` is now 5x faster and `[u16]::reverse` is now
510 - [`eprint!` and `eprintln!` macros added to prelude.][41192] Same as the `print!`
511 macros, but for printing to stderr.
516 - [`OsString::shrink_to_fit`]
519 - [`thread::ThreadId`]
524 - [Build scripts can now add environment variables to the environment
525 the crate is being compiled in.
526 Example: `println!("cargo:rustc-env=FOO=bar");`][cargo/3929]
527 - [Subcommands now replace the current process rather than spawning a new
528 child process][cargo/3970]
529 - [Workspace members can now accept glob file patterns][cargo/3979]
530 - [Added `--all` flag to the `cargo bench` subcommand to run benchmarks of all
531 the members in a given workspace.][cargo/3988]
532 - [Updated `libssh2-sys` to 0.2.6][cargo/4008]
533 - [Target directory path is now in the cargo metadata][cargo/4022]
534 - [Cargo no longer checks out a local working directory for the
535 crates.io index][cargo/4026] This should provide smaller file size for the
536 registry, and improve cloning times, especially on Windows machines.
537 - [Added an `--exclude` option for excluding certain packages when using the
538 `--all` option][cargo/4031]
539 - [Cargo will now automatically retry when receiving a 5xx error
540 from crates.io][cargo/4032]
541 - [The `--features` option now accepts multiple comma or space
542 delimited values.][cargo/4084]
543 - [Added support for custom target specific runners][cargo/3954]
548 - [Added `rust-windbg.cmd`][39983] for loading rust `.natvis` files in the
550 - [Rust will now release XZ compressed packages][rust-installer/57]
551 - [rustup will now prefer to download rust packages with
552 XZ compression][rustup/1100] over GZip packages.
553 - [Added the ability to escape `#` in rust documentation][41785] By adding
554 additional `#`'s ie. `##` is now `#`
559 - [`MutexGuard<T>` may only be `Sync` if `T` is `Sync`.][41624]
560 - [`-Z` flags are now no longer allowed to be used on the stable
561 compiler.][41751] This has been a warning for a year previous to this.
562 - [As a result of the `-Z` flag change, the `cargo-check` plugin no
563 longer works][42844]. Users should migrate to the built-in `check`
564 command, which has been available since 1.16.
565 - [Ending a float literal with `._` is now a hard error.
566 Example: `42._` .][41946]
567 - [Any use of a private `extern crate` outside of its module is now a
568 hard error.][36886] This was previously a warning.
569 - [`use ::self::foo;` is now a hard error.][36888] `self` paths are always
570 relative while the `::` prefix makes a path absolute, but was ignored and the
571 path was relative regardless.
572 - [Floating point constants in match patterns is now a hard error][36890]
573 This was previously a warning.
574 - [Struct or enum constants that don't derive `PartialEq` & `Eq` used
575 match patterns is now a hard error][36891] This was previously a warning.
576 - [Lifetimes named `'_` are no longer allowed.][36892] This was previously
578 - [From the pound escape, lines consisting of multiple `#`s are
580 - [It is an error to reexport private enum variants][42460]. This is
581 known to break a number of crates that depend on an older version of
583 - [On Windows, if `VCINSTALLDIR` is set incorrectly, `rustc` will try
584 to use it to find the linker, and the build will fail where it did
585 not previously][42607]
587 [36886]: https://github.com/rust-lang/rust/issues/36886
588 [36888]: https://github.com/rust-lang/rust/issues/36888
589 [36890]: https://github.com/rust-lang/rust/issues/36890
590 [36891]: https://github.com/rust-lang/rust/issues/36891
591 [36892]: https://github.com/rust-lang/rust/issues/36892
592 [37406]: https://github.com/rust-lang/rust/issues/37406
593 [39983]: https://github.com/rust-lang/rust/pull/39983
594 [41145]: https://github.com/rust-lang/rust/pull/41145
595 [41192]: https://github.com/rust-lang/rust/pull/41192
596 [41258]: https://github.com/rust-lang/rust/pull/41258
597 [41370]: https://github.com/rust-lang/rust/pull/41370
598 [41449]: https://github.com/rust-lang/rust/pull/41449
599 [41530]: https://github.com/rust-lang/rust/pull/41530
600 [41624]: https://github.com/rust-lang/rust/pull/41624
601 [41656]: https://github.com/rust-lang/rust/pull/41656
602 [41659]: https://github.com/rust-lang/rust/pull/41659
603 [41676]: https://github.com/rust-lang/rust/pull/41676
604 [41751]: https://github.com/rust-lang/rust/pull/41751
605 [41764]: https://github.com/rust-lang/rust/pull/41764
606 [41785]: https://github.com/rust-lang/rust/pull/41785
607 [41873]: https://github.com/rust-lang/rust/pull/41873
608 [41907]: https://github.com/rust-lang/rust/pull/41907
609 [41946]: https://github.com/rust-lang/rust/pull/41946
610 [42016]: https://github.com/rust-lang/rust/pull/42016
611 [42037]: https://github.com/rust-lang/rust/pull/42037
612 [42068]: https://github.com/rust-lang/rust/pull/42068
613 [42150]: https://github.com/rust-lang/rust/pull/42150
614 [42162]: https://github.com/rust-lang/rust/pull/42162
615 [42225]: https://github.com/rust-lang/rust/pull/42225
616 [42264]: https://github.com/rust-lang/rust/pull/42264
617 [42302]: https://github.com/rust-lang/rust/pull/42302
618 [42460]: https://github.com/rust-lang/rust/issues/42460
619 [42607]: https://github.com/rust-lang/rust/issues/42607
620 [42740]: https://github.com/rust-lang/rust/pull/42740
621 [42844]: https://github.com/rust-lang/rust/issues/42844
622 [42948]: https://github.com/rust-lang/rust/pull/42948
623 [RFC 1444]: https://github.com/rust-lang/rfcs/pull/1444
624 [RFC 1506]: https://github.com/rust-lang/rfcs/pull/1506
625 [RFC 1558]: https://github.com/rust-lang/rfcs/pull/1558
626 [RFC 1624]: https://github.com/rust-lang/rfcs/pull/1624
627 [RFC 1721]: https://github.com/rust-lang/rfcs/pull/1721
628 [`Command::envs`]: https://doc.rust-lang.org/std/process/struct.Command.html#method.envs
629 [`OsString::shrink_to_fit`]: https://doc.rust-lang.org/std/ffi/struct.OsString.html#method.shrink_to_fit
630 [`cmp::Reverse`]: https://doc.rust-lang.org/std/cmp/struct.Reverse.html
631 [`thread::ThreadId`]: https://doc.rust-lang.org/std/thread/struct.ThreadId.html
632 [cargo/3929]: https://github.com/rust-lang/cargo/pull/3929
633 [cargo/3954]: https://github.com/rust-lang/cargo/pull/3954
634 [cargo/3970]: https://github.com/rust-lang/cargo/pull/3970
635 [cargo/3979]: https://github.com/rust-lang/cargo/pull/3979
636 [cargo/3988]: https://github.com/rust-lang/cargo/pull/3988
637 [cargo/4008]: https://github.com/rust-lang/cargo/pull/4008
638 [cargo/4022]: https://github.com/rust-lang/cargo/pull/4022
639 [cargo/4026]: https://github.com/rust-lang/cargo/pull/4026
640 [cargo/4031]: https://github.com/rust-lang/cargo/pull/4031
641 [cargo/4032]: https://github.com/rust-lang/cargo/pull/4032
642 [cargo/4084]: https://github.com/rust-lang/cargo/pull/4084
643 [rust-installer/57]: https://github.com/rust-lang/rust-installer/pull/57
644 [rustup/1100]: https://github.com/rust-lang-nursery/rustup.rs/pull/1100
647 Version 1.18.0 (2017-06-08)
648 ===========================
653 - [Stabilize pub(restricted)][40556] `pub` can now accept a module path to
654 make the item visible to just that module tree. Also accepts the keyword
655 `crate` to make something public to the whole crate but not users of the
656 library. Example: `pub(crate) mod utils;`. [RFC 1422].
657 - [Stabilize `#![windows_subsystem]` attribute][40870] conservative exposure of the
658 `/SUBSYSTEM` linker flag on Windows platforms. [RFC 1665].
659 - [Refactor of trait object type parsing][40043] Now `ty` in macros can accept
660 types like `Write + Send`, trailing `+` are now supported in trait objects,
661 and better error reporting for trait objects starting with `?Sized`.
662 - [0e+10 is now a valid floating point literal][40589]
663 - [Now warns if you bind a lifetime parameter to 'static][40734]
664 - [Tuples, Enum variant fields, and structs with no `repr` attribute or with
665 `#[repr(Rust)]` are reordered to minimize padding and produce a smaller
666 representation in some cases.][40377]
671 - [rustc can now emit mir with `--emit mir`][39891]
672 - [Improved LLVM IR for trivial functions][40367]
673 - [Added explanation for E0090(Wrong number of lifetimes are supplied)][40723]
674 - [rustc compilation is now 15%-20% faster][41469] Thanks to optimisation
675 opportunities found through profiling
676 - [Improved backtrace formatting when panicking][38165]
681 - [Specialized `Vec::from_iter` being passed `vec::IntoIter`][40731] if the
682 iterator hasn't been advanced the original `Vec` is reassembled with no actual
683 iteration or reallocation.
684 - [Simplified HashMap Bucket interface][40561] provides performance
685 improvements for iterating and cloning.
686 - [Specialize Vec::from_elem to use calloc][40409]
687 - [Fixed Race condition in fs::create_dir_all][39799]
688 - [No longer caching stdio on Windows][40516]
689 - [Optimized insertion sort in slice][40807] insertion sort in some cases
690 2.50%~ faster and in one case now 12.50% faster.
691 - [Optimized `AtomicBool::fetch_nand`][41143]
696 - [`Child::try_wait`]
697 - [`HashMap::retain`]
698 - [`HashSet::retain`]
700 - [`TcpStream::peek`]
701 - [`UdpSocket::peek`]
702 - [`UdpSocket::peek_from`]
707 - [Added partial Pijul support][cargo/3842] Pijul is a version control system in Rust.
708 You can now create new cargo projects with Pijul using `cargo new --vcs pijul`
709 - [Now always emits build script warnings for crates that fail to build][cargo/3847]
710 - [Added Android build support][cargo/3885]
711 - [Added `--bins` and `--tests` flags][cargo/3901] now you can build all programs
712 of a certain type, for example `cargo build --bins` will build all
714 - [Added support for haiku][cargo/3952]
719 - [rustdoc can now use pulldown-cmark with the `--enable-commonmark` flag][40338]
720 - [Added rust-windbg script for better debugging on Windows][39983]
721 - [Rust now uses the official cross compiler for NetBSD][40612]
722 - [rustdoc now accepts `#` at the start of files][40828]
723 - [Fixed jemalloc support for musl][41168]
728 - [Changes to how the `0` flag works in format!][40241] Padding zeroes are now
729 always placed after the sign if it exists and before the digits. With the `#`
730 flag the zeroes are placed after the prefix and before the digits.
731 - [Due to the struct field optimisation][40377], using `transmute` on structs
732 that have no `repr` attribute or `#[repr(Rust)]` will no longer work. This has
733 always been undefined behavior, but is now more likely to break in practice.
734 - [The refactor of trait object type parsing][40043] fixed a bug where `+` was
735 receiving the wrong priority parsing things like `&for<'a> Tr<'a> + Send` as
736 `&(for<'a> Tr<'a> + Send)` instead of `(&for<'a> Tr<'a>) + Send`
737 - [Overlapping inherent `impl`s are now a hard error][40728]
738 - [`PartialOrd` and `Ord` must agree on the ordering.][41270]
739 - [`rustc main.rs -o out --emit=asm,llvm-ir`][41085] Now will output
740 `out.asm` and `out.ll` instead of only one of the filetypes.
741 - [ calling a function that returns `Self` will no longer work][41805] when
742 the size of `Self` cannot be statically determined.
743 - [rustc now builds with a "pthreads" flavour of MinGW for Windows GNU][40805]
744 this has caused a few regressions namely:
746 - Changed the link order of local static/dynamic libraries (respecting the
747 order on given rather than having the compiler reorder).
748 - Changed how MinGW is linked, native code linked to dynamic libraries
749 may require manually linking to the gcc support library (for the native
752 [38165]: https://github.com/rust-lang/rust/pull/38165
753 [39799]: https://github.com/rust-lang/rust/pull/39799
754 [39891]: https://github.com/rust-lang/rust/pull/39891
755 [39983]: https://github.com/rust-lang/rust/pull/39983
756 [40043]: https://github.com/rust-lang/rust/pull/40043
757 [40241]: https://github.com/rust-lang/rust/pull/40241
758 [40338]: https://github.com/rust-lang/rust/pull/40338
759 [40367]: https://github.com/rust-lang/rust/pull/40367
760 [40377]: https://github.com/rust-lang/rust/pull/40377
761 [40409]: https://github.com/rust-lang/rust/pull/40409
762 [40516]: https://github.com/rust-lang/rust/pull/40516
763 [40556]: https://github.com/rust-lang/rust/pull/40556
764 [40561]: https://github.com/rust-lang/rust/pull/40561
765 [40589]: https://github.com/rust-lang/rust/pull/40589
766 [40612]: https://github.com/rust-lang/rust/pull/40612
767 [40723]: https://github.com/rust-lang/rust/pull/40723
768 [40728]: https://github.com/rust-lang/rust/pull/40728
769 [40731]: https://github.com/rust-lang/rust/pull/40731
770 [40734]: https://github.com/rust-lang/rust/pull/40734
771 [40805]: https://github.com/rust-lang/rust/pull/40805
772 [40807]: https://github.com/rust-lang/rust/pull/40807
773 [40828]: https://github.com/rust-lang/rust/pull/40828
774 [40870]: https://github.com/rust-lang/rust/pull/40870
775 [41085]: https://github.com/rust-lang/rust/pull/41085
776 [41143]: https://github.com/rust-lang/rust/pull/41143
777 [41168]: https://github.com/rust-lang/rust/pull/41168
778 [41270]: https://github.com/rust-lang/rust/issues/41270
779 [41469]: https://github.com/rust-lang/rust/pull/41469
780 [41805]: https://github.com/rust-lang/rust/issues/41805
781 [RFC 1422]: https://github.com/rust-lang/rfcs/blob/master/text/1422-pub-restricted.md
782 [RFC 1665]: https://github.com/rust-lang/rfcs/blob/master/text/1665-windows-subsystem.md
783 [`Child::try_wait`]: https://doc.rust-lang.org/std/process/struct.Child.html#method.try_wait
784 [`HashMap::retain`]: https://doc.rust-lang.org/std/collections/struct.HashMap.html#method.retain
785 [`HashSet::retain`]: https://doc.rust-lang.org/std/collections/struct.HashSet.html#method.retain
786 [`PeekMut::pop`]: https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html#method.pop
787 [`TcpStream::peek`]: https://doc.rust-lang.org/std/net/struct.TcpStream.html#method.peek
788 [`UdpSocket::peek_from`]: https://doc.rust-lang.org/std/net/struct.UdpSocket.html#method.peek_from
789 [`UdpSocket::peek`]: https://doc.rust-lang.org/std/net/struct.UdpSocket.html#method.peek
790 [cargo/3842]: https://github.com/rust-lang/cargo/pull/3842
791 [cargo/3847]: https://github.com/rust-lang/cargo/pull/3847
792 [cargo/3885]: https://github.com/rust-lang/cargo/pull/3885
793 [cargo/3901]: https://github.com/rust-lang/cargo/pull/3901
794 [cargo/3952]: https://github.com/rust-lang/cargo/pull/3952
797 Version 1.17.0 (2017-04-27)
798 ===========================
803 * [The lifetime of statics and consts defaults to `'static`][39265]. [RFC 1623]
804 * [Fields of structs may be initialized without duplicating the field/variable
805 names][39761]. [RFC 1682]
806 * [`Self` may be included in the `where` clause of `impls`][38864]. [RFC 1647]
807 * [When coercing to an unsized type lifetimes must be equal][40319]. That is,
808 there is no subtyping between `T` and `U` when `T: Unsize<U>`. For example,
809 coercing `&mut [&'a X; N]` to `&mut [&'b X]` requires `'a` be equal to
811 * [Values passed to the indexing operator, `[]`, automatically coerce][40166]
812 * [Static variables may contain references to other statics][40027]
817 * [Exit quickly on only `--emit dep-info`][40336]
818 * [Make `-C relocation-model` more correctly determine whether the linker
819 creates a position-independent executable][40245]
820 * [Add `-C overflow-checks` to directly control whether integer overflow
822 * [The rustc type checker now checks items on demand instead of in a single
823 in-order pass][40008]. This is mostly an internal refactoring in support of
824 future work, including incremental type checking, but also resolves [RFC
825 1647], allowing `Self` to appear in `impl` `where` clauses.
826 * [Optimize vtable loads][39995]
827 * [Turn off vectorization for Emscripten targets][39990]
828 * [Provide suggestions for unknown macros imported with `use`][39953]
829 * [Fix ICEs in path resolution][39939]
830 * [Strip exception handling code on Emscripten when `panic=abort`][39193]
831 * [Add clearer error message using `&str + &str`][39116]
843 * [`Ordering::then_with`]
844 * [`BTreeMap::range`]
845 * [`BTreeMap::range_mut`]
846 * [`collections::Bound`]
848 * [`ptr::read_unaligned`]
849 * [`ptr::write_unaligned`]
850 * [`Result::expect_err`]
853 * [`Cell::into_inner`]
859 * [`BTreeMap` and `BTreeSet` can iterate over ranges][27787]
860 * [`Cell` can store non-`Copy` types][39793]. [RFC 1651]
861 * [`String` implements `FromIterator<&char>`][40028]
862 * `Box` [implements][40009] a number of new conversions:
863 `From<Box<str>> for String`,
864 `From<Box<[T]>> for Vec<T>`,
865 `From<Box<CStr>> for CString`,
866 `From<Box<OsStr>> for OsString`,
867 `From<Box<Path>> for PathBuf`,
868 `Into<Box<str>> for String`,
869 `Into<Box<[T]>> for Vec<T>`,
870 `Into<Box<CStr>> for CString`,
871 `Into<Box<OsStr>> for OsString`,
872 `Into<Box<Path>> for PathBuf`,
873 `Default for Box<str>`,
874 `Default for Box<CStr>`,
875 `Default for Box<OsStr>`,
876 `From<&CStr> for Box<CStr>`,
877 `From<&OsStr> for Box<OsStr>`,
878 `From<&Path> for Box<Path>`
879 * [`ffi::FromBytesWithNulError` implements `Error` and `Display`][39960]
880 * [Specialize `PartialOrd<A> for [A] where A: Ord`][39642]
881 * [Slightly optimize `slice::sort`][39538]
882 * [Add `ToString` trait specialization for `Cow<'a, str>` and `String`][39440]
883 * [`Box<[T]>` implements `From<&[T]> where T: Copy`,
884 `Box<str>` implements `From<&str>`][39438]
885 * [`IpAddr` implements `From` for various arrays. `SocketAddr` implements
886 `From<(I, u16)> where I: Into<IpAddr>`][39372]
887 * [`format!` estimates the needed capacity before writing a string][39356]
888 * [Support unprivileged symlink creation in Windows][38921]
889 * [`PathBuf` implements `Default`][38764]
890 * [Implement `PartialEq<[A]>` for `VecDeque<A>`][38661]
891 * [`HashMap` resizes adaptively][38368] to guard against DOS attacks
892 and poor hash functions.
897 * [Add `cargo check --all`][cargo/3731]
898 * [Add an option to ignore SSL revocation checking][cargo/3699]
899 * [Add `cargo run --package`][cargo/3691]
900 * [Add `required_features`][cargo/3667]
901 * [Assume `build.rs` is a build script][cargo/3664]
902 * [Find workspace via `workspace_root` link in containing member][cargo/3562]
907 * [Documentation is rendered with mdbook instead of the obsolete, in-tree
909 * [The "Unstable Book" documents nightly-only features][ubook]
910 * [Improve the style of the sidebar in rustdoc output][40265]
911 * [Configure build correctly on 64-bit CPU's with the armhf ABI][40261]
912 * [Fix MSP430 breakage due to `i128`][40257]
913 * [Preliminary Solaris/SPARCv9 support][39903]
914 * [`rustc` is linked statically on Windows MSVC targets][39837], allowing it to
915 run without installing the MSVC runtime.
916 * [`rustdoc --test` includes file names in test names][39788]
917 * This release includes builds of `std` for `sparc64-unknown-linux-gnu`,
918 `aarch64-unknown-linux-fuchsia`, and `x86_64-unknown-linux-fuchsia`.
919 * [Initial support for `aarch64-unknown-freebsd`][39491]
920 * [Initial support for `i686-unknown-netbsd`][39426]
921 * [This release no longer includes the old makefile build system][39431]. Rust
922 is built with a custom build system, written in Rust, and with Cargo.
923 * [Add Debug implementations for libcollection structs][39002]
924 * [`TypeId` implements `PartialOrd` and `Ord`][38981]
925 * [`--test-threads=0` produces an error][38945]
926 * [`rustup` installs documentation by default][40526]
927 * [The Rust source includes NatVis visualizations][39843]. These can be used by
928 WinDbg and Visual Studio to improve the debugging experience.
933 * [Rust 1.17 does not correctly detect the MSVC 2017 linker][38584]. As a
934 workaround, either use MSVC 2015 or run vcvars.bat.
935 * [When coercing to an unsized type lifetimes must be equal][40319]. That is,
936 disallow subtyping between `T` and `U` when `T: Unsize<U>`, e.g. coercing
937 `&mut [&'a X; N]` to `&mut [&'b X]` requires `'a` be equal to `'b`. Soundness
939 * [`format!` and `Display::to_string` panic if an underlying formatting
940 implementation returns an error][40117]. Previously the error was silently
941 ignored. It is incorrect for `write_fmt` to return an error when writing
943 * [In-tree crates are verified to be unstable][39851]. Previously, some minor
944 crates were marked stable and could be accessed from the stable toolchain.
945 * [Rust git source no longer includes vendored crates][39728]. Those that need
946 to build with vendored crates should build from release tarballs.
947 * [Fix inert attributes from `proc_macro_derives`][39572]
948 * [During crate resolution, rustc prefers a crate in the sysroot if two crates
949 are otherwise identical][39518]. Unlikely to be encountered outside the Rust
951 * [Fixed bugs around how type inference interacts with dead-code][39485]. The
952 existing code generally ignores the type of dead-code unless a type-hint is
953 provided; this can cause surprising inference interactions particularly around
954 defaulting. The new code uniformly ignores the result type of dead-code.
955 * [Tuple-struct constructors with private fields are no longer visible][38932]
956 * [Lifetime parameters that do not appear in the arguments are now considered
957 early-bound][38897], resolving a soundness bug (#[32330]). The
958 `hr_lifetime_in_assoc_type` future-compatibility lint has been in effect since
960 * [rustdoc: fix doctests with non-feature crate attributes][38161]
961 * [Make transmuting from fn item types to pointer-sized types a hard
964 [27787]: https://github.com/rust-lang/rust/issues/27787
965 [32330]: https://github.com/rust-lang/rust/issues/32330
966 [34198]: https://github.com/rust-lang/rust/pull/34198
967 [38161]: https://github.com/rust-lang/rust/pull/38161
968 [38368]: https://github.com/rust-lang/rust/pull/38368
969 [38584]: https://github.com/rust-lang/rust/issues/38584
970 [38661]: https://github.com/rust-lang/rust/pull/38661
971 [38764]: https://github.com/rust-lang/rust/pull/38764
972 [38864]: https://github.com/rust-lang/rust/issues/38864
973 [38897]: https://github.com/rust-lang/rust/pull/38897
974 [38921]: https://github.com/rust-lang/rust/pull/38921
975 [38932]: https://github.com/rust-lang/rust/pull/38932
976 [38945]: https://github.com/rust-lang/rust/pull/38945
977 [38981]: https://github.com/rust-lang/rust/pull/38981
978 [39002]: https://github.com/rust-lang/rust/pull/39002
979 [39116]: https://github.com/rust-lang/rust/pull/39116
980 [39193]: https://github.com/rust-lang/rust/pull/39193
981 [39265]: https://github.com/rust-lang/rust/pull/39265
982 [39356]: https://github.com/rust-lang/rust/pull/39356
983 [39372]: https://github.com/rust-lang/rust/pull/39372
984 [39426]: https://github.com/rust-lang/rust/pull/39426
985 [39431]: https://github.com/rust-lang/rust/pull/39431
986 [39438]: https://github.com/rust-lang/rust/pull/39438
987 [39440]: https://github.com/rust-lang/rust/pull/39440
988 [39485]: https://github.com/rust-lang/rust/pull/39485
989 [39491]: https://github.com/rust-lang/rust/pull/39491
990 [39518]: https://github.com/rust-lang/rust/pull/39518
991 [39538]: https://github.com/rust-lang/rust/pull/39538
992 [39572]: https://github.com/rust-lang/rust/pull/39572
993 [39633]: https://github.com/rust-lang/rust/pull/39633
994 [39642]: https://github.com/rust-lang/rust/pull/39642
995 [39728]: https://github.com/rust-lang/rust/pull/39728
996 [39761]: https://github.com/rust-lang/rust/pull/39761
997 [39788]: https://github.com/rust-lang/rust/pull/39788
998 [39793]: https://github.com/rust-lang/rust/pull/39793
999 [39837]: https://github.com/rust-lang/rust/pull/39837
1000 [39843]: https://github.com/rust-lang/rust/pull/39843
1001 [39851]: https://github.com/rust-lang/rust/pull/39851
1002 [39903]: https://github.com/rust-lang/rust/pull/39903
1003 [39939]: https://github.com/rust-lang/rust/pull/39939
1004 [39953]: https://github.com/rust-lang/rust/pull/39953
1005 [39960]: https://github.com/rust-lang/rust/pull/39960
1006 [39990]: https://github.com/rust-lang/rust/pull/39990
1007 [39995]: https://github.com/rust-lang/rust/pull/39995
1008 [40008]: https://github.com/rust-lang/rust/pull/40008
1009 [40009]: https://github.com/rust-lang/rust/pull/40009
1010 [40027]: https://github.com/rust-lang/rust/pull/40027
1011 [40028]: https://github.com/rust-lang/rust/pull/40028
1012 [40037]: https://github.com/rust-lang/rust/pull/40037
1013 [40117]: https://github.com/rust-lang/rust/pull/40117
1014 [40166]: https://github.com/rust-lang/rust/pull/40166
1015 [40245]: https://github.com/rust-lang/rust/pull/40245
1016 [40257]: https://github.com/rust-lang/rust/pull/40257
1017 [40261]: https://github.com/rust-lang/rust/pull/40261
1018 [40265]: https://github.com/rust-lang/rust/pull/40265
1019 [40319]: https://github.com/rust-lang/rust/pull/40319
1020 [40336]: https://github.com/rust-lang/rust/pull/40336
1021 [40526]: https://github.com/rust-lang/rust/pull/40526
1022 [RFC 1623]: https://github.com/rust-lang/rfcs/blob/master/text/1623-static.md
1023 [RFC 1647]: https://github.com/rust-lang/rfcs/blob/master/text/1647-allow-self-in-where-clauses.md
1024 [RFC 1651]: https://github.com/rust-lang/rfcs/blob/master/text/1651-movecell.md
1025 [RFC 1682]: https://github.com/rust-lang/rfcs/blob/master/text/1682-field-init-shorthand.md
1026 [`Arc::from_raw`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.from_raw
1027 [`Arc::into_raw`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.into_raw
1028 [`Arc::ptr_eq`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.ptr_eq
1029 [`BTreeMap::range_mut`]: https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.range_mut
1030 [`BTreeMap::range`]: https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.range
1031 [`Cell::into_inner`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.into_inner
1032 [`Cell::replace`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.replace
1033 [`Cell::swap`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.swap
1034 [`Cell::take`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.take
1035 [`Ordering::then_with`]: https://doc.rust-lang.org/std/cmp/enum.Ordering.html#method.then_with
1036 [`Ordering::then`]: https://doc.rust-lang.org/std/cmp/enum.Ordering.html#method.then
1037 [`Rc::from_raw`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.from_raw
1038 [`Rc::into_raw`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.into_raw
1039 [`Rc::ptr_eq`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.ptr_eq
1040 [`Result::expect_err`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.expect_err
1041 [`collections::Bound`]: https://doc.rust-lang.org/std/collections/enum.Bound.html
1042 [`process::abort`]: https://doc.rust-lang.org/std/process/fn.abort.html
1043 [`ptr::read_unaligned`]: https://doc.rust-lang.org/std/ptr/fn.read_unaligned.html
1044 [`ptr::write_unaligned`]: https://doc.rust-lang.org/std/ptr/fn.write_unaligned.html
1045 [cargo/3562]: https://github.com/rust-lang/cargo/pull/3562
1046 [cargo/3664]: https://github.com/rust-lang/cargo/pull/3664
1047 [cargo/3667]: https://github.com/rust-lang/cargo/pull/3667
1048 [cargo/3691]: https://github.com/rust-lang/cargo/pull/3691
1049 [cargo/3699]: https://github.com/rust-lang/cargo/pull/3699
1050 [cargo/3731]: https://github.com/rust-lang/cargo/pull/3731
1051 [mdbook]: https://crates.io/crates/mdbook
1052 [ubook]: https://doc.rust-lang.org/unstable-book/
1055 Version 1.16.0 (2017-03-16)
1056 ===========================
1061 * [The compiler's `dead_code` lint now accounts for type aliases][38051].
1062 * [Uninhabitable enums (those without any variants) no longer permit wildcard
1063 match patterns][38069]
1064 * [Clean up semantics of `self` in an import list][38313]
1065 * [`Self` may appear in `impl` headers][38920]
1066 * [`Self` may appear in struct expressions][39282]
1071 * [`rustc` now supports `--emit=metadata`, which causes rustc to emit
1072 a `.rmeta` file containing only crate metadata][38571]. This can be
1073 used by tools like the Rust Language Service to perform
1074 metadata-only builds.
1075 * [Levenshtein based typo suggestions now work in most places, while
1076 previously they worked only for fields and sometimes for local
1077 variables][38927]. Together with the overhaul of "no
1078 resolution"/"unexpected resolution" errors (#[38154]) they result in
1079 large and systematic improvement in resolution diagnostics.
1080 * [Fix `transmute::<T, U>` where `T` requires a bigger alignment than
1082 * [rustc: use -Xlinker when specifying an rpath with ',' in it][38798]
1083 * [`rustc` no longer attempts to provide "consider using an explicit
1084 lifetime" suggestions][37057]. They were inaccurate.
1089 * [`VecDeque::truncate`]
1090 * [`VecDeque::resize`]
1091 * [`String::insert_str`]
1092 * [`Duration::checked_add`]
1093 * [`Duration::checked_sub`]
1094 * [`Duration::checked_div`]
1095 * [`Duration::checked_mul`]
1098 * [`SocketAddr::is_ipv4`]
1099 * [`SocketAddr::is_ipv6`]
1100 * [`IpAddr::is_ipv4`]
1101 * [`IpAddr::is_ipv6`]
1103 * [`Vec::dedup_by_key`]
1104 * [`Result::unwrap_or_default`]
1105 * [`<*const T>::wrapping_offset`]
1106 * [`<*mut T>::wrapping_offset`]
1107 * `CommandExt::creation_flags`
1108 * [`File::set_permissions`]
1109 * [`String::split_off`]
1114 * [`[T]::binary_search` and `[T]::binary_search_by_key` now take
1115 their argument by `Borrow` parameter][37761]
1116 * [All public types in std implement `Debug`][38006]
1117 * [`IpAddr` implements `From<Ipv4Addr>` and `From<Ipv6Addr>`][38327]
1118 * [`Ipv6Addr` implements `From<[u16; 8]>`][38131]
1119 * [Ctrl-Z returns from `Stdin.read()` when reading from the console on
1121 * [std: Fix partial writes in `LineWriter`][38062]
1122 * [std: Clamp max read/write sizes on Unix][38062]
1123 * [Use more specific panic message for `&str` slicing errors][38066]
1124 * [`TcpListener::set_only_v6` is deprecated][38304]. This
1125 functionality cannot be achieved in std currently.
1126 * [`writeln!`, like `println!`, now accepts a form with no string
1127 or formatting arguments, to just print a newline][38469]
1128 * [Implement `iter::Sum` and `iter::Product` for `Result`][38580]
1129 * [Reduce the size of static data in `std_unicode::tables`][38781]
1130 * [`char::EscapeDebug`, `EscapeDefault`, `EscapeUnicode`,
1131 `CaseMappingIter`, `ToLowercase`, `ToUppercase`, implement
1133 * [`Duration` implements `Sum`][38712]
1134 * [`String` implements `ToSocketAddrs`][39048]
1139 * [The `cargo check` command does a type check of a project without
1140 building it][cargo/3296]
1141 * [crates.io will display CI badges from Travis and AppVeyor, if
1142 specified in Cargo.toml][cargo/3546]
1143 * [crates.io will display categories listed in Cargo.toml][cargo/3301]
1144 * [Compilation profiles accept integer values for `debug`, in addition
1145 to `true` and `false`. These are passed to `rustc` as the value to
1146 `-C debuginfo`][cargo/3534]
1147 * [Implement `cargo --version --verbose`][cargo/3604]
1148 * [All builds now output 'dep-info' build dependencies compatible with
1149 make and ninja][cargo/3557]
1150 * [Build all workspace members with `build --all`][cargo/3511]
1151 * [Document all workspace members with `doc --all`][cargo/3515]
1152 * [Path deps outside workspace are not members][cargo/3443]
1157 * [`rustdoc` has a `--sysroot` argument that, like `rustc`, specifies
1158 the path to the Rust implementation][38589]
1159 * [The `armv7-linux-androideabi` target no longer enables NEON
1160 extensions, per Google's ABI guide][38413]
1161 * [The stock standard library can be compiled for Redox OS][38401]
1162 * [Rust has initial SPARC support][38726]. Tier 3. No builds
1164 * [Rust has experimental support for Nvidia PTX][38559]. Tier 3. No
1166 * [Fix backtraces on i686-pc-windows-gnu by disabling FPO][39379]
1171 * [Uninhabitable enums (those without any variants) no longer permit wildcard
1172 match patterns][38069]
1173 * In this release, references to uninhabited types can not be
1174 pattern-matched. This was accidentally allowed in 1.15.
1175 * [The compiler's `dead_code` lint now accounts for type aliases][38051].
1176 * [Ctrl-Z returns from `Stdin.read()` when reading from the console on
1178 * [Clean up semantics of `self` in an import list][38313]
1179 * Reimplemented lifetime elision. This change was almost entirely compatible
1180 with existing code, but it did close a number of small bugs and loopholes,
1181 as well as being more accepting in some other [cases][41105].
1183 [37057]: https://github.com/rust-lang/rust/pull/37057
1184 [37761]: https://github.com/rust-lang/rust/pull/37761
1185 [38006]: https://github.com/rust-lang/rust/pull/38006
1186 [38051]: https://github.com/rust-lang/rust/pull/38051
1187 [38062]: https://github.com/rust-lang/rust/pull/38062
1188 [38062]: https://github.com/rust-lang/rust/pull/38622
1189 [38066]: https://github.com/rust-lang/rust/pull/38066
1190 [38069]: https://github.com/rust-lang/rust/pull/38069
1191 [38131]: https://github.com/rust-lang/rust/pull/38131
1192 [38154]: https://github.com/rust-lang/rust/pull/38154
1193 [38274]: https://github.com/rust-lang/rust/pull/38274
1194 [38304]: https://github.com/rust-lang/rust/pull/38304
1195 [38313]: https://github.com/rust-lang/rust/pull/38313
1196 [38314]: https://github.com/rust-lang/rust/pull/38314
1197 [38327]: https://github.com/rust-lang/rust/pull/38327
1198 [38401]: https://github.com/rust-lang/rust/pull/38401
1199 [38413]: https://github.com/rust-lang/rust/pull/38413
1200 [38469]: https://github.com/rust-lang/rust/pull/38469
1201 [38559]: https://github.com/rust-lang/rust/pull/38559
1202 [38571]: https://github.com/rust-lang/rust/pull/38571
1203 [38580]: https://github.com/rust-lang/rust/pull/38580
1204 [38589]: https://github.com/rust-lang/rust/pull/38589
1205 [38670]: https://github.com/rust-lang/rust/pull/38670
1206 [38712]: https://github.com/rust-lang/rust/pull/38712
1207 [38726]: https://github.com/rust-lang/rust/pull/38726
1208 [38781]: https://github.com/rust-lang/rust/pull/38781
1209 [38798]: https://github.com/rust-lang/rust/pull/38798
1210 [38909]: https://github.com/rust-lang/rust/pull/38909
1211 [38920]: https://github.com/rust-lang/rust/pull/38920
1212 [38927]: https://github.com/rust-lang/rust/pull/38927
1213 [39048]: https://github.com/rust-lang/rust/pull/39048
1214 [39282]: https://github.com/rust-lang/rust/pull/39282
1215 [39379]: https://github.com/rust-lang/rust/pull/39379
1216 [41105]: https://github.com/rust-lang/rust/issues/41105
1217 [`<*const T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset
1218 [`<*mut T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset
1219 [`Duration::checked_add`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_add
1220 [`Duration::checked_div`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_div
1221 [`Duration::checked_mul`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_mul
1222 [`Duration::checked_sub`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_sub
1223 [`File::set_permissions`]: https://doc.rust-lang.org/std/fs/struct.File.html#method.set_permissions
1224 [`IpAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv4
1225 [`IpAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv6
1226 [`Result::unwrap_or_default`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.unwrap_or_default
1227 [`SocketAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv4
1228 [`SocketAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv6
1229 [`String::insert_str`]: https://doc.rust-lang.org/std/string/struct.String.html#method.insert_str
1230 [`String::split_off`]: https://doc.rust-lang.org/std/string/struct.String.html#method.split_off
1231 [`Vec::dedup_by_key`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by_key
1232 [`Vec::dedup_by`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by
1233 [`VecDeque::resize`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.resize
1234 [`VecDeque::truncate`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.truncate
1235 [`str::repeat`]: https://doc.rust-lang.org/std/primitive.str.html#method.repeat
1236 [`str::replacen`]: https://doc.rust-lang.org/std/primitive.str.html#method.replacen
1237 [cargo/3296]: https://github.com/rust-lang/cargo/pull/3296
1238 [cargo/3301]: https://github.com/rust-lang/cargo/pull/3301
1239 [cargo/3443]: https://github.com/rust-lang/cargo/pull/3443
1240 [cargo/3511]: https://github.com/rust-lang/cargo/pull/3511
1241 [cargo/3515]: https://github.com/rust-lang/cargo/pull/3515
1242 [cargo/3534]: https://github.com/rust-lang/cargo/pull/3534
1243 [cargo/3546]: https://github.com/rust-lang/cargo/pull/3546
1244 [cargo/3557]: https://github.com/rust-lang/cargo/pull/3557
1245 [cargo/3604]: https://github.com/rust-lang/cargo/pull/3604
1246 [RFC 1623]: https://github.com/rust-lang/rfcs/blob/master/text/1623-static.md
1249 Version 1.15.1 (2017-02-09)
1250 ===========================
1252 * [Fix IntoIter::as_mut_slice's signature][39466]
1253 * [Compile compiler builtins with `-fPIC` on 32-bit platforms][39523]
1255 [39466]: https://github.com/rust-lang/rust/pull/39466
1256 [39523]: https://github.com/rust-lang/rust/pull/39523
1259 Version 1.15.0 (2017-02-02)
1260 ===========================
1265 * Basic procedural macros allowing custom `#[derive]`, aka "macros 1.1", are
1266 stable. This allows popular code-generating crates like Serde and Diesel to
1267 work ergonomically. [RFC 1681].
1268 * [Tuple structs may be empty. Unary and empty tuple structs may be instantiated
1269 with curly braces][36868]. Part of [RFC 1506].
1270 * [A number of minor changes to name resolution have been activated][37127].
1271 They add up to more consistent semantics, allowing for future evolution of
1272 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
1273 details of what is different. The breaking changes here have been transitioned
1274 through the [`legacy_imports`] lint since 1.14, with no known regressions.
1275 * [In `macro_rules`, `path` fragments can now be parsed as type parameter
1277 * [`?Sized` can be used in `where` clauses][37791]
1278 * [There is now a limit on the size of monomorphized types and it can be
1279 modified with the `#![type_size_limit]` crate attribute, similarly to
1280 the `#![recursion_limit]` attribute][37789]
1285 * [On Windows, the compiler will apply dllimport attributes when linking to
1286 extern functions][37973]. Additional attributes and flags can control which
1287 library kind is linked and its name. [RFC 1717].
1288 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
1289 * [The `--test` flag works with procedural macro crates][38107]
1290 * [Fix `extern "aapcs" fn` ABI][37814]
1291 * [The `-C no-stack-check` flag is deprecated][37636]. It does nothing.
1292 * [The `format!` expander recognizes incorrect `printf` and shell-style
1293 formatting directives and suggests the correct format][37613].
1294 * [Only report one error for all unused imports in an import list][37456]
1296 Compiler Performance
1297 --------------------
1299 * [Avoid unnecessary `mk_ty` calls in `Ty::super_fold_with`][37705]
1300 * [Avoid more unnecessary `mk_ty` calls in `Ty::super_fold_with`][37979]
1301 * [Don't clone in `UnificationTable::probe`][37848]
1302 * [Remove `scope_auxiliary` to cut RSS by 10%][37764]
1303 * [Use small vectors in type walker][37760]
1304 * [Macro expansion performance was improved][37701]
1305 * [Change `HirVec<P<T>>` to `HirVec<T>` in `hir::Expr`][37642]
1306 * [Replace FNV with a faster hash function][37229]
1311 * [`std::iter::Iterator::min_by`]
1312 * [`std::iter::Iterator::max_by`]
1313 * [`std::os::*::fs::FileExt`]
1314 * [`std::sync::atomic::Atomic*::get_mut`]
1315 * [`std::sync::atomic::Atomic*::into_inner`]
1316 * [`std::vec::IntoIter::as_slice`]
1317 * [`std::vec::IntoIter::as_mut_slice`]
1318 * [`std::sync::mpsc::Receiver::try_iter`]
1319 * [`std::os::unix::process::CommandExt::before_exec`]
1320 * [`std::rc::Rc::strong_count`]
1321 * [`std::rc::Rc::weak_count`]
1322 * [`std::sync::Arc::strong_count`]
1323 * [`std::sync::Arc::weak_count`]
1324 * [`std::char::encode_utf8`]
1325 * [`std::char::encode_utf16`]
1326 * [`std::cell::Ref::clone`]
1327 * [`std::io::Take::into_inner`]
1332 * [The standard sorting algorithm has been rewritten for dramatic performance
1333 improvements][38192]. It is a hybrid merge sort, drawing influences from
1334 Timsort. Previously it was a naive merge sort.
1335 * [`Iterator::nth` no longer has a `Sized` bound][38134]
1336 * [`Extend<&T>` is specialized for `Vec` where `T: Copy`][38182] to improve
1338 * [`chars().count()` is much faster][37888] and so are [`chars().last()`
1339 and `char_indices().last()`][37882]
1340 * [Fix ARM Objective-C ABI in `std::env::args`][38146]
1341 * [Chinese characters display correctly in `fmt::Debug`][37855]
1342 * [Derive `Default` for `Duration`][37699]
1343 * [Support creation of anonymous pipes on WinXP/2k][37677]
1344 * [`mpsc::RecvTimeoutError` implements `Error`][37527]
1345 * [Don't pass overlapped handles to processes][38835]
1350 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
1351 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
1352 should instead check the variable at runtime with `std::env`. That the value
1353 was set at build time was a bug, and incorrect when cross-compiling. This
1354 change is known to cause breakage.
1355 * [Add `--all` flag to `cargo test`][cargo/3221]
1356 * [Compile statically against the MSVC CRT][cargo/3363]
1357 * [Mix feature flags into fingerprint/metadata shorthash][cargo/3102]
1358 * [Link OpenSSL statically on OSX][cargo/3311]
1359 * [Apply new fingerprinting to build dir outputs][cargo/3310]
1360 * [Test for bad path overrides with summaries][cargo/3336]
1361 * [Require `cargo install --vers` to take a semver version][cargo/3338]
1362 * [Fix retrying crate downloads for network errors][cargo/3348]
1363 * [Implement string lookup for `build.rustflags` config key][cargo/3356]
1364 * [Emit more info on --message-format=json][cargo/3319]
1365 * [Assume `build.rs` in the same directory as `Cargo.toml` is a build script][cargo/3361]
1366 * [Don't ignore errors in workspace manifest][cargo/3409]
1367 * [Fix `--message-format JSON` when rustc emits non-JSON warnings][cargo/3410]
1372 * [Test runners (binaries built with `--test`) now support a `--list` argument
1373 that lists the tests it contains][38185]
1374 * [Test runners now support a `--exact` argument that makes the test filter
1375 match exactly, instead of matching only a substring of the test name][38181]
1376 * [rustdoc supports a `--playground-url` flag][37763]
1377 * [rustdoc provides more details about `#[should_panic]` errors][37749]
1382 * [The Rust build system is now written in Rust][37817]. The Makefiles may
1383 continue to be used in this release by passing `--disable-rustbuild` to the
1384 configure script, but they will be deleted soon. Note that the new build
1385 system uses a different on-disk layout that will likely affect any scripts
1387 * [Rust supports i686-unknown-openbsd][38086]. Tier 3 support. No testing or
1389 * [Rust supports the MSP430][37627]. Tier 3 support. No testing or releases.
1390 * [Rust supports the ARMv5TE architecture][37615]. Tier 3 support. No testing or
1396 * [A number of minor changes to name resolution have been activated][37127].
1397 They add up to more consistent semantics, allowing for future evolution of
1398 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
1399 details of what is different. The breaking changes here have been transitioned
1400 through the [`legacy_imports`] lint since 1.14, with no known regressions.
1401 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
1402 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
1403 should instead check the variable at runtime with `std::env`. That the value
1404 was set at build time was a bug, and incorrect when cross-compiling. This
1405 change is known to cause breakage.
1406 * [Higher-ranked lifetimes are no longer allowed to appear _only_ in associated
1407 types][33685]. The [`hr_lifetime_in_assoc_type` lint] has been a warning since
1408 1.10 and is now an error by default. It will become a hard error in the near
1410 * [The semantics relating modules to file system directories are changing in
1411 minor ways][37602]. This is captured in the new `legacy_directory_ownership`
1412 lint, which is a warning in this release, and will become a hard error in the
1414 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
1415 * [Once `Peekable` peeks a `None` it will return that `None` without re-querying
1416 the underlying iterator][37834]
1418 ["changes"]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md#changes-to-name-resolution-rules
1419 [33685]: https://github.com/rust-lang/rust/issues/33685
1420 [36868]: https://github.com/rust-lang/rust/pull/36868
1421 [37127]: https://github.com/rust-lang/rust/pull/37127
1422 [37229]: https://github.com/rust-lang/rust/pull/37229
1423 [37456]: https://github.com/rust-lang/rust/pull/37456
1424 [37527]: https://github.com/rust-lang/rust/pull/37527
1425 [37602]: https://github.com/rust-lang/rust/pull/37602
1426 [37613]: https://github.com/rust-lang/rust/pull/37613
1427 [37615]: https://github.com/rust-lang/rust/pull/37615
1428 [37636]: https://github.com/rust-lang/rust/pull/37636
1429 [37627]: https://github.com/rust-lang/rust/pull/37627
1430 [37642]: https://github.com/rust-lang/rust/pull/37642
1431 [37677]: https://github.com/rust-lang/rust/pull/37677
1432 [37699]: https://github.com/rust-lang/rust/pull/37699
1433 [37701]: https://github.com/rust-lang/rust/pull/37701
1434 [37705]: https://github.com/rust-lang/rust/pull/37705
1435 [37749]: https://github.com/rust-lang/rust/pull/37749
1436 [37760]: https://github.com/rust-lang/rust/pull/37760
1437 [37763]: https://github.com/rust-lang/rust/pull/37763
1438 [37764]: https://github.com/rust-lang/rust/pull/37764
1439 [37789]: https://github.com/rust-lang/rust/pull/37789
1440 [37791]: https://github.com/rust-lang/rust/pull/37791
1441 [37814]: https://github.com/rust-lang/rust/pull/37814
1442 [37817]: https://github.com/rust-lang/rust/pull/37817
1443 [37834]: https://github.com/rust-lang/rust/pull/37834
1444 [37848]: https://github.com/rust-lang/rust/pull/37848
1445 [37855]: https://github.com/rust-lang/rust/pull/37855
1446 [37882]: https://github.com/rust-lang/rust/pull/37882
1447 [37888]: https://github.com/rust-lang/rust/pull/37888
1448 [37973]: https://github.com/rust-lang/rust/pull/37973
1449 [37979]: https://github.com/rust-lang/rust/pull/37979
1450 [38086]: https://github.com/rust-lang/rust/pull/38086
1451 [38107]: https://github.com/rust-lang/rust/pull/38107
1452 [38117]: https://github.com/rust-lang/rust/pull/38117
1453 [38134]: https://github.com/rust-lang/rust/pull/38134
1454 [38146]: https://github.com/rust-lang/rust/pull/38146
1455 [38181]: https://github.com/rust-lang/rust/pull/38181
1456 [38182]: https://github.com/rust-lang/rust/pull/38182
1457 [38185]: https://github.com/rust-lang/rust/pull/38185
1458 [38192]: https://github.com/rust-lang/rust/pull/38192
1459 [38279]: https://github.com/rust-lang/rust/pull/38279
1460 [38835]: https://github.com/rust-lang/rust/pull/38835
1461 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
1462 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
1463 [RFC 1560]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md
1464 [RFC 1681]: https://github.com/rust-lang/rfcs/blob/master/text/1681-macros-1.1.md
1465 [RFC 1717]: https://github.com/rust-lang/rfcs/blob/master/text/1717-dllimport.md
1466 [`hr_lifetime_in_assoc_type` lint]: https://github.com/rust-lang/rust/issues/33685
1467 [`legacy_imports`]: https://github.com/rust-lang/rust/pull/38271
1468 [cargo/3102]: https://github.com/rust-lang/cargo/pull/3102
1469 [cargo/3221]: https://github.com/rust-lang/cargo/pull/3221
1470 [cargo/3310]: https://github.com/rust-lang/cargo/pull/3310
1471 [cargo/3311]: https://github.com/rust-lang/cargo/pull/3311
1472 [cargo/3319]: https://github.com/rust-lang/cargo/pull/3319
1473 [cargo/3336]: https://github.com/rust-lang/cargo/pull/3336
1474 [cargo/3338]: https://github.com/rust-lang/cargo/pull/3338
1475 [cargo/3348]: https://github.com/rust-lang/cargo/pull/3348
1476 [cargo/3356]: https://github.com/rust-lang/cargo/pull/3356
1477 [cargo/3361]: https://github.com/rust-lang/cargo/pull/3361
1478 [cargo/3363]: https://github.com/rust-lang/cargo/pull/3363
1479 [cargo/3368]: https://github.com/rust-lang/cargo/issues/3368
1480 [cargo/3409]: https://github.com/rust-lang/cargo/pull/3409
1481 [cargo/3410]: https://github.com/rust-lang/cargo/pull/3410
1482 [`std::iter::Iterator::min_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.min_by
1483 [`std::iter::Iterator::max_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.max_by
1484 [`std::os::*::fs::FileExt`]: https://doc.rust-lang.org/std/os/unix/fs/trait.FileExt.html
1485 [`std::sync::atomic::Atomic*::get_mut`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.get_mut
1486 [`std::sync::atomic::Atomic*::into_inner`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.into_inner
1487 [`std::vec::IntoIter::as_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_slice
1488 [`std::vec::IntoIter::as_mut_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_mut_slice
1489 [`std::sync::mpsc::Receiver::try_iter`]: https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.try_iter
1490 [`std::os::unix::process::CommandExt::before_exec`]: https://doc.rust-lang.org/std/os/unix/process/trait.CommandExt.html#tymethod.before_exec
1491 [`std::rc::Rc::strong_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.strong_count
1492 [`std::rc::Rc::weak_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.weak_count
1493 [`std::sync::Arc::strong_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.strong_count
1494 [`std::sync::Arc::weak_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.weak_count
1495 [`std::char::encode_utf8`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf8
1496 [`std::char::encode_utf16`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf16
1497 [`std::cell::Ref::clone`]: https://doc.rust-lang.org/std/cell/struct.Ref.html#method.clone
1498 [`std::io::Take::into_inner`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.into_inner
1501 Version 1.14.0 (2016-12-22)
1502 ===========================
1507 * [`..` matches multiple tuple fields in enum variants, structs
1508 and tuples][36843]. [RFC 1492].
1509 * [Safe `fn` items can be coerced to `unsafe fn` pointers][37389]
1510 * [`use *` and `use ::*` both glob-import from the crate root][37367]
1511 * [It's now possible to call a `Vec<Box<Fn()>>` without explicit
1512 dereferencing][36822]
1517 * [Mark enums with non-zero discriminant as non-zero][37224]
1518 * [Lower-case `static mut` names are linted like other
1519 statics and consts][37162]
1520 * [Fix ICE on some macros in const integer positions
1521 (e.g. `[u8; m!()]`)][36819]
1522 * [Improve error message and snippet for "did you mean `x`"][36798]
1523 * [Add a panic-strategy field to the target specification][36794]
1524 * [Include LLVM version in `--version --verbose`][37200]
1526 Compile-time Optimizations
1527 --------------------------
1529 * [Improve macro expansion performance][37569]
1530 * [Shrink `Expr_::ExprInlineAsm`][37445]
1531 * [Replace all uses of SHA-256 with BLAKE2b][37439]
1532 * [Reduce the number of bytes hashed by `IchHasher`][37427]
1533 * [Avoid more allocations when compiling html5ever][37373]
1534 * [Use `SmallVector` in `CombineFields::instantiate`][37322]
1535 * [Avoid some allocations in the macro parser][37318]
1536 * [Use a faster deflate setting][37298]
1537 * [Add `ArrayVec` and `AccumulateVec` to reduce heap allocations
1538 during interning of slices][37270]
1539 * [Optimize `write_metadata`][37267]
1540 * [Don't process obligation forest cycles when stalled][37231]
1541 * [Avoid many `CrateConfig` clones][37161]
1542 * [Optimize `Substs::super_fold_with`][37108]
1543 * [Optimize `ObligationForest`'s `NodeState` handling][36993]
1544 * [Speed up `plug_leaks`][36917]
1549 * [`println!()`, with no arguments, prints newline][36825].
1550 Previously, an empty string was required to achieve the same.
1551 * [`Wrapping` impls standard binary and unary operators, as well as
1552 the `Sum` and `Product` iterators][37356]
1553 * [Implement `From<Cow<str>> for String` and `From<Cow<[T]>> for
1555 * [Improve `fold` performance for `chain`, `cloned`, `map`, and
1556 `VecDeque` iterators][37315]
1557 * [Improve `SipHasher` performance on small values][37312]
1558 * [Add Iterator trait TrustedLen to enable better FromIterator /
1560 * [Expand `.zip()` specialization to `.map()` and `.cloned()`][37230]
1561 * [`ReadDir` implements `Debug`][37221]
1562 * [Implement `RefUnwindSafe` for atomic types][37178]
1563 * [Specialize `Vec::extend` to `Vec::extend_from_slice`][37094]
1564 * [Avoid allocations in `Decoder::read_str`][37064]
1565 * [`io::Error` implements `From<io::ErrorKind>`][37037]
1566 * [Impl `Debug` for raw pointers to unsized data][36880]
1567 * [Don't reuse `HashMap` random seeds][37470]
1568 * [The internal memory layout of `HashMap` is more cache-friendly, for
1569 significant improvements in some operations][36692]
1570 * [`HashMap` uses less memory on 32-bit architectures][36595]
1571 * [Impl `Add<{str, Cow<str>}>` for `Cow<str>`][36430]
1576 * [Expose rustc cfg values to build scripts][cargo/3243]
1577 * [Allow cargo to work with read-only `CARGO_HOME`][cargo/3259]
1578 * [Fix passing --features when testing multiple packages][cargo/3280]
1579 * [Use a single profile set per workspace][cargo/3249]
1580 * [Load `replace` sections from lock files][cargo/3220]
1581 * [Ignore `panic` configuration for test/bench profiles][cargo/3175]
1586 * [rustup is the recommended Rust installation method][1.14rustup]
1587 * This release includes host (rustc) builds for Linux on MIPS, PowerPC, and
1588 S390x. These are [tier 2] platforms and may have major defects. Follow the
1589 instructions on the website to install, or add the targets to an existing
1590 installation with `rustup target add`. The new target triples are:
1591 - `mips-unknown-linux-gnu`
1592 - `mipsel-unknown-linux-gnu`
1593 - `mips64-unknown-linux-gnuabi64`
1594 - `mips64el-unknown-linux-gnuabi64 `
1595 - `powerpc-unknown-linux-gnu`
1596 - `powerpc64-unknown-linux-gnu`
1597 - `powerpc64le-unknown-linux-gnu`
1598 - `s390x-unknown-linux-gnu `
1599 * This release includes target (std) builds for ARM Linux running MUSL
1600 libc. These are [tier 2] platforms and may have major defects. Add the
1601 following triples to an existing rustup installation with `rustup target add`:
1602 - `arm-unknown-linux-musleabi`
1603 - `arm-unknown-linux-musleabihf`
1604 - `armv7-unknown-linux-musleabihf`
1605 * This release includes [experimental support for WebAssembly][1.14wasm], via
1606 the `wasm32-unknown-emscripten` target. This target is known to have major
1607 defects. Please test, report, and fix.
1608 * rustup no longer installs documentation by default. Run `rustup
1609 component add rust-docs` to install.
1610 * [Fix line stepping in debugger][37310]
1611 * [Enable line number debuginfo in releases][37280]
1616 * [Disable jemalloc on aarch64/powerpc/mips][37392]
1617 * [Add support for Fuchsia OS][37313]
1618 * [Detect local-rebuild by only MAJOR.MINOR version][37273]
1623 * [A number of forward-compatibility lints used by the compiler
1624 to gradually introduce language changes have been converted
1625 to deny by default][36894]:
1626 - ["use of inaccessible extern crate erroneously allowed"][36886]
1627 - ["type parameter default erroneously allowed in invalid location"][36887]
1628 - ["detects super or self keywords at the beginning of global path"][36888]
1629 - ["two overlapping inherent impls define an item with the same name
1630 were erroneously allowed"][36889]
1631 - ["floating-point constants cannot be used in patterns"][36890]
1632 - ["constants of struct or enum type can only be used in a pattern if
1633 the struct or enum has `#[derive(PartialEq, Eq)]`"][36891]
1634 - ["lifetimes or labels named `'_` were erroneously allowed"][36892]
1635 * [Prohibit patterns in trait methods without bodies][37378]
1636 * [The atomic `Ordering` enum may not be matched exhaustively][37351]
1637 * [Future-proofing `#[no_link]` breaks some obscure cases][37247]
1638 * [The `$crate` macro variable is accepted in fewer locations][37213]
1639 * [Impls specifying extra region requirements beyond the trait
1640 they implement are rejected][37167]
1641 * [Enums may not be unsized][37111]. Unsized enums are intended to
1642 work but never have. For now they are forbidden.
1643 * [Enforce the shadowing restrictions from RFC 1560 for today's macros][36767]
1645 [tier 2]: https://forge.rust-lang.org/platform-support.html
1646 [1.14rustup]: https://internals.rust-lang.org/t/beta-testing-rustup-rs/3316/204
1647 [1.14wasm]: https://users.rust-lang.org/t/compiling-to-the-web-with-rust-and-emscripten/7627
1648 [36430]: https://github.com/rust-lang/rust/pull/36430
1649 [36595]: https://github.com/rust-lang/rust/pull/36595
1650 [36595]: https://github.com/rust-lang/rust/pull/36595
1651 [36692]: https://github.com/rust-lang/rust/pull/36692
1652 [36767]: https://github.com/rust-lang/rust/pull/36767
1653 [36794]: https://github.com/rust-lang/rust/pull/36794
1654 [36798]: https://github.com/rust-lang/rust/pull/36798
1655 [36819]: https://github.com/rust-lang/rust/pull/36819
1656 [36822]: https://github.com/rust-lang/rust/pull/36822
1657 [36825]: https://github.com/rust-lang/rust/pull/36825
1658 [36843]: https://github.com/rust-lang/rust/pull/36843
1659 [36880]: https://github.com/rust-lang/rust/pull/36880
1660 [36886]: https://github.com/rust-lang/rust/issues/36886
1661 [36887]: https://github.com/rust-lang/rust/issues/36887
1662 [36888]: https://github.com/rust-lang/rust/issues/36888
1663 [36889]: https://github.com/rust-lang/rust/issues/36889
1664 [36890]: https://github.com/rust-lang/rust/issues/36890
1665 [36891]: https://github.com/rust-lang/rust/issues/36891
1666 [36892]: https://github.com/rust-lang/rust/issues/36892
1667 [36894]: https://github.com/rust-lang/rust/pull/36894
1668 [36917]: https://github.com/rust-lang/rust/pull/36917
1669 [36993]: https://github.com/rust-lang/rust/pull/36993
1670 [37037]: https://github.com/rust-lang/rust/pull/37037
1671 [37064]: https://github.com/rust-lang/rust/pull/37064
1672 [37094]: https://github.com/rust-lang/rust/pull/37094
1673 [37108]: https://github.com/rust-lang/rust/pull/37108
1674 [37111]: https://github.com/rust-lang/rust/pull/37111
1675 [37161]: https://github.com/rust-lang/rust/pull/37161
1676 [37162]: https://github.com/rust-lang/rust/pull/37162
1677 [37167]: https://github.com/rust-lang/rust/pull/37167
1678 [37178]: https://github.com/rust-lang/rust/pull/37178
1679 [37200]: https://github.com/rust-lang/rust/pull/37200
1680 [37213]: https://github.com/rust-lang/rust/pull/37213
1681 [37221]: https://github.com/rust-lang/rust/pull/37221
1682 [37224]: https://github.com/rust-lang/rust/pull/37224
1683 [37230]: https://github.com/rust-lang/rust/pull/37230
1684 [37231]: https://github.com/rust-lang/rust/pull/37231
1685 [37247]: https://github.com/rust-lang/rust/pull/37247
1686 [37267]: https://github.com/rust-lang/rust/pull/37267
1687 [37270]: https://github.com/rust-lang/rust/pull/37270
1688 [37273]: https://github.com/rust-lang/rust/pull/37273
1689 [37280]: https://github.com/rust-lang/rust/pull/37280
1690 [37298]: https://github.com/rust-lang/rust/pull/37298
1691 [37306]: https://github.com/rust-lang/rust/pull/37306
1692 [37310]: https://github.com/rust-lang/rust/pull/37310
1693 [37312]: https://github.com/rust-lang/rust/pull/37312
1694 [37313]: https://github.com/rust-lang/rust/pull/37313
1695 [37315]: https://github.com/rust-lang/rust/pull/37315
1696 [37318]: https://github.com/rust-lang/rust/pull/37318
1697 [37322]: https://github.com/rust-lang/rust/pull/37322
1698 [37326]: https://github.com/rust-lang/rust/pull/37326
1699 [37351]: https://github.com/rust-lang/rust/pull/37351
1700 [37356]: https://github.com/rust-lang/rust/pull/37356
1701 [37367]: https://github.com/rust-lang/rust/pull/37367
1702 [37373]: https://github.com/rust-lang/rust/pull/37373
1703 [37378]: https://github.com/rust-lang/rust/pull/37378
1704 [37389]: https://github.com/rust-lang/rust/pull/37389
1705 [37392]: https://github.com/rust-lang/rust/pull/37392
1706 [37427]: https://github.com/rust-lang/rust/pull/37427
1707 [37439]: https://github.com/rust-lang/rust/pull/37439
1708 [37445]: https://github.com/rust-lang/rust/pull/37445
1709 [37470]: https://github.com/rust-lang/rust/pull/37470
1710 [37569]: https://github.com/rust-lang/rust/pull/37569
1711 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
1712 [cargo/3175]: https://github.com/rust-lang/cargo/pull/3175
1713 [cargo/3220]: https://github.com/rust-lang/cargo/pull/3220
1714 [cargo/3243]: https://github.com/rust-lang/cargo/pull/3243
1715 [cargo/3249]: https://github.com/rust-lang/cargo/pull/3249
1716 [cargo/3259]: https://github.com/rust-lang/cargo/pull/3259
1717 [cargo/3280]: https://github.com/rust-lang/cargo/pull/3280
1720 Version 1.13.0 (2016-11-10)
1721 ===========================
1726 * [Stabilize the `?` operator][36995]. `?` is a simple way to propagate
1727 errors, like the `try!` macro, described in [RFC 0243].
1728 * [Stabilize macros in type position][36014]. Described in [RFC 873].
1729 * [Stabilize attributes on statements][36995]. Described in [RFC 0016].
1730 * [Fix `#[derive]` for empty tuple structs/variants][35728]
1731 * [Fix lifetime rules for 'if' conditions][36029]
1732 * [Avoid loading and parsing unconfigured non-inline modules][36482]
1737 * [Add the `-C link-arg` argument][36574]
1738 * [Remove the old AST-based backend from rustc_trans][35764]
1739 * [Don't enable NEON by default on armv7 Linux][35814]
1740 * [Fix debug line number info for macro expansions][35238]
1741 * [Do not emit "class method" debuginfo for types that are not
1742 DICompositeType][36008]
1743 * [Warn about multiple conflicting #[repr] hints][34623]
1744 * [When sizing DST, don't double-count nested struct prefixes][36351]
1745 * [Default RUST_MIN_STACK to 16MiB for now][36505]
1746 * [Improve rlib metadata format][36551]. Reduces rlib size significantly.
1747 * [Reject macros with empty repetitions to avoid infinite loop][36721]
1748 * [Expand macros without recursing to avoid stack overflows][36214]
1753 * [Replace macro backtraces with labeled local uses][35702]
1754 * [Improve error message for misplaced doc comments][33922]
1755 * [Buffer unix and lock windows to prevent message interleaving][35975]
1756 * [Update lifetime errors to specifically note temporaries][36171]
1757 * [Special case a few colors for Windows][36178]
1758 * [Suggest `use self` when such an import resolves][36289]
1759 * [Be more specific when type parameter shadows primitive type][36338]
1760 * Many minor improvements
1762 Compile-time Optimizations
1763 --------------------------
1765 * [Compute and cache HIR hashes at beginning][35854]
1766 * [Don't hash types in loan paths][36004]
1767 * [Cache projections in trans][35761]
1768 * [Optimize the parser's last token handling][36527]
1769 * [Only instantiate #[inline] functions in codegen units referencing
1770 them][36524]. This leads to big improvements in cases where crates export
1771 define many inline functions without using them directly.
1772 * [Lazily allocate TypedArena's first chunk][36592]
1773 * [Don't allocate during default HashSet creation][36734]
1780 * [`overflowing_abs`]
1781 * [`RefCell::try_borrow`]
1782 * [`RefCell::try_borrow_mut`]
1787 * [Add `assert_ne!` and `debug_assert_ne!`][35074]
1788 * [Make `vec_deque::Drain`, `hash_map::Drain`, and `hash_set::Drain`
1790 * [Implement `AsRef<[T]>` for `std::slice::Iter`][35559]
1791 * [Implement `Debug` for `std::vec::IntoIter`][35707]
1792 * [`CString`: avoid excessive growth just to 0-terminate][35871]
1793 * [Implement `CoerceUnsized` for `{Cell, RefCell, UnsafeCell}`][35627]
1794 * [Use arc4rand on FreeBSD][35884]
1795 * [memrchr: Correct aligned offset computation][35969]
1796 * [Improve Demangling of Rust Symbols][36059]
1797 * [Use monotonic time in condition variables][35048]
1798 * [Implement `Debug` for `std::path::{Components,Iter}`][36101]
1799 * [Implement conversion traits for `char`][35755]
1800 * [Fix illegal instruction caused by overflow in channel cloning][36104]
1801 * [Zero first byte of CString on drop][36264]
1802 * [Inherit overflow checks for sum and product][36372]
1803 * [Add missing Eq implementations][36423]
1804 * [Implement `Debug` for `DirEntry`][36631]
1805 * [When `getaddrinfo` returns `EAI_SYSTEM` retrieve actual error from
1807 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
1808 * [Implement more traits for `std::io::ErrorKind`][35911]
1809 * [Optimize BinaryHeap bounds checking][36072]
1810 * [Work around pointer aliasing issue in `Vec::extend_from_slice`,
1811 `extend_with_element`][36355]
1812 * [Fix overflow checking in unsigned pow()][34942]
1817 * This release includes security fixes to both curl and OpenSSL.
1818 * [Fix transitive doctests when panic=abort][cargo/3021]
1819 * [Add --all-features flag to cargo][cargo/3038]
1820 * [Reject path-based dependencies in `cargo package`][cargo/3060]
1821 * [Don't parse the home directory more than once][cargo/3078]
1822 * [Don't try to generate Cargo.lock on empty workspaces][cargo/3092]
1823 * [Update OpenSSL to 1.0.2j][cargo/3121]
1824 * [Add license and license_file to cargo metadata output][cargo/3110]
1825 * [Make crates-io registry URL optional in config; ignore all changes to
1826 source.crates-io][cargo/3089]
1827 * [Don't download dependencies from other platforms][cargo/3123]
1828 * [Build transitive dev-dependencies when needed][cargo/3125]
1829 * [Add support for per-target rustflags in .cargo/config][cargo/3157]
1830 * [Avoid updating registry when adding existing deps][cargo/3144]
1831 * [Warn about path overrides that won't work][cargo/3136]
1832 * [Use workspaces during `cargo install`][cargo/3146]
1833 * [Leak mspdbsrv.exe processes on Windows][cargo/3162]
1834 * [Add --message-format flag][cargo/3000]
1835 * [Pass target environment for rustdoc][cargo/3205]
1836 * [Use `CommandExt::exec` for `cargo run` on Unix][cargo/2818]
1837 * [Update curl and curl-sys][cargo/3241]
1838 * [Call rustdoc test with the correct cfg flags of a package][cargo/3242]
1843 * [rustdoc: Add the `--sysroot` argument][36586]
1844 * [rustdoc: Fix a couple of issues with the search results][35655]
1845 * [rustdoc: remove the `!` from macro URLs and titles][35234]
1846 * [gdb: Fix pretty-printing special-cased Rust types][35585]
1847 * [rustdoc: Filter more incorrect methods inherited through Deref][36266]
1852 * [Remove unmaintained style guide][35124]
1853 * [Add s390x support][36369]
1854 * [Initial work at Haiku OS support][36727]
1855 * [Add mips-uclibc targets][35734]
1856 * [Crate-ify compiler-rt into compiler-builtins][35021]
1857 * [Add rustc version info (git hash + date) to dist tarball][36213]
1858 * Many documentation improvements
1863 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
1864 * [Deny (by default) transmuting from fn item types to pointer-sized
1865 types][34923]. Continuing the long transition to zero-sized fn items,
1867 * [Fix `#[derive]` for empty tuple structs/variants][35728].
1869 * [Issue deprecation warnings for safe accesses to extern statics][36173]
1870 * [Fix lifetime rules for 'if' conditions][36029].
1871 * [Inherit overflow checks for sum and product][36372].
1872 * [Forbid user-defined macros named "macro_rules"][36730].
1874 [33922]: https://github.com/rust-lang/rust/pull/33922
1875 [34623]: https://github.com/rust-lang/rust/pull/34623
1876 [34923]: https://github.com/rust-lang/rust/pull/34923
1877 [34942]: https://github.com/rust-lang/rust/pull/34942
1878 [34982]: https://github.com/rust-lang/rust/pull/34982
1879 [35021]: https://github.com/rust-lang/rust/pull/35021
1880 [35048]: https://github.com/rust-lang/rust/pull/35048
1881 [35074]: https://github.com/rust-lang/rust/pull/35074
1882 [35124]: https://github.com/rust-lang/rust/pull/35124
1883 [35234]: https://github.com/rust-lang/rust/pull/35234
1884 [35238]: https://github.com/rust-lang/rust/pull/35238
1885 [35354]: https://github.com/rust-lang/rust/pull/35354
1886 [35559]: https://github.com/rust-lang/rust/pull/35559
1887 [35585]: https://github.com/rust-lang/rust/pull/35585
1888 [35627]: https://github.com/rust-lang/rust/pull/35627
1889 [35655]: https://github.com/rust-lang/rust/pull/35655
1890 [35702]: https://github.com/rust-lang/rust/pull/35702
1891 [35707]: https://github.com/rust-lang/rust/pull/35707
1892 [35728]: https://github.com/rust-lang/rust/pull/35728
1893 [35734]: https://github.com/rust-lang/rust/pull/35734
1894 [35755]: https://github.com/rust-lang/rust/pull/35755
1895 [35761]: https://github.com/rust-lang/rust/pull/35761
1896 [35764]: https://github.com/rust-lang/rust/pull/35764
1897 [35814]: https://github.com/rust-lang/rust/pull/35814
1898 [35854]: https://github.com/rust-lang/rust/pull/35854
1899 [35871]: https://github.com/rust-lang/rust/pull/35871
1900 [35884]: https://github.com/rust-lang/rust/pull/35884
1901 [35911]: https://github.com/rust-lang/rust/pull/35911
1902 [35969]: https://github.com/rust-lang/rust/pull/35969
1903 [35975]: https://github.com/rust-lang/rust/pull/35975
1904 [36004]: https://github.com/rust-lang/rust/pull/36004
1905 [36008]: https://github.com/rust-lang/rust/pull/36008
1906 [36014]: https://github.com/rust-lang/rust/pull/36014
1907 [36029]: https://github.com/rust-lang/rust/pull/36029
1908 [36059]: https://github.com/rust-lang/rust/pull/36059
1909 [36072]: https://github.com/rust-lang/rust/pull/36072
1910 [36101]: https://github.com/rust-lang/rust/pull/36101
1911 [36104]: https://github.com/rust-lang/rust/pull/36104
1912 [36171]: https://github.com/rust-lang/rust/pull/36171
1913 [36173]: https://github.com/rust-lang/rust/pull/36173
1914 [36178]: https://github.com/rust-lang/rust/pull/36178
1915 [36213]: https://github.com/rust-lang/rust/pull/36213
1916 [36214]: https://github.com/rust-lang/rust/pull/36214
1917 [36264]: https://github.com/rust-lang/rust/pull/36264
1918 [36266]: https://github.com/rust-lang/rust/pull/36266
1919 [36289]: https://github.com/rust-lang/rust/pull/36289
1920 [36338]: https://github.com/rust-lang/rust/pull/36338
1921 [36351]: https://github.com/rust-lang/rust/pull/36351
1922 [36355]: https://github.com/rust-lang/rust/pull/36355
1923 [36369]: https://github.com/rust-lang/rust/pull/36369
1924 [36372]: https://github.com/rust-lang/rust/pull/36372
1925 [36423]: https://github.com/rust-lang/rust/pull/36423
1926 [36482]: https://github.com/rust-lang/rust/pull/36482
1927 [36505]: https://github.com/rust-lang/rust/pull/36505
1928 [36524]: https://github.com/rust-lang/rust/pull/36524
1929 [36527]: https://github.com/rust-lang/rust/pull/36527
1930 [36551]: https://github.com/rust-lang/rust/pull/36551
1931 [36574]: https://github.com/rust-lang/rust/pull/36574
1932 [36586]: https://github.com/rust-lang/rust/pull/36586
1933 [36592]: https://github.com/rust-lang/rust/pull/36592
1934 [36631]: https://github.com/rust-lang/rust/pull/36631
1935 [36639]: https://github.com/rust-lang/rust/pull/36639
1936 [36721]: https://github.com/rust-lang/rust/pull/36721
1937 [36727]: https://github.com/rust-lang/rust/pull/36727
1938 [36730]: https://github.com/rust-lang/rust/pull/36730
1939 [36734]: https://github.com/rust-lang/rust/pull/36734
1940 [36754]: https://github.com/rust-lang/rust/pull/36754
1941 [36995]: https://github.com/rust-lang/rust/pull/36995
1942 [RFC 0016]: https://github.com/rust-lang/rfcs/blob/master/text/0016-more-attributes.md
1943 [RFC 0243]: https://github.com/rust-lang/rfcs/blob/master/text/0243-trait-based-exception-handling.md
1944 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
1945 [RFC 401]: https://github.com/rust-lang/rfcs/blob/master/text/0401-coercions.md
1946 [RFC 873]: https://github.com/rust-lang/rfcs/blob/master/text/0873-type-macros.md
1947 [cargo/2818]: https://github.com/rust-lang/cargo/pull/2818
1948 [cargo/3000]: https://github.com/rust-lang/cargo/pull/3000
1949 [cargo/3021]: https://github.com/rust-lang/cargo/pull/3021
1950 [cargo/3038]: https://github.com/rust-lang/cargo/pull/3038
1951 [cargo/3060]: https://github.com/rust-lang/cargo/pull/3060
1952 [cargo/3078]: https://github.com/rust-lang/cargo/pull/3078
1953 [cargo/3089]: https://github.com/rust-lang/cargo/pull/3089
1954 [cargo/3092]: https://github.com/rust-lang/cargo/pull/3092
1955 [cargo/3110]: https://github.com/rust-lang/cargo/pull/3110
1956 [cargo/3121]: https://github.com/rust-lang/cargo/pull/3121
1957 [cargo/3123]: https://github.com/rust-lang/cargo/pull/3123
1958 [cargo/3125]: https://github.com/rust-lang/cargo/pull/3125
1959 [cargo/3136]: https://github.com/rust-lang/cargo/pull/3136
1960 [cargo/3144]: https://github.com/rust-lang/cargo/pull/3144
1961 [cargo/3146]: https://github.com/rust-lang/cargo/pull/3146
1962 [cargo/3157]: https://github.com/rust-lang/cargo/pull/3157
1963 [cargo/3162]: https://github.com/rust-lang/cargo/pull/3162
1964 [cargo/3205]: https://github.com/rust-lang/cargo/pull/3205
1965 [cargo/3241]: https://github.com/rust-lang/cargo/pull/3241
1966 [cargo/3242]: https://github.com/rust-lang/cargo/pull/3242
1967 [rustup]: https://www.rustup.rs
1968 [`checked_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.checked_abs
1969 [`wrapping_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.wrapping_abs
1970 [`overflowing_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.overflowing_abs
1971 [`RefCell::try_borrow`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow
1972 [`RefCell::try_borrow_mut`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow_mut
1973 [`SipHasher`]: https://doc.rust-lang.org/std/hash/struct.SipHasher.html
1974 [`DefaultHasher`]: https://doc.rust-lang.org/std/collections/hash_map/struct.DefaultHasher.html
1977 Version 1.12.1 (2016-10-20)
1978 ===========================
1983 * [ICE: 'rustc' panicked at 'assertion failed: concrete_substs.is_normalized_for_trans()' #36381][36381]
1984 * [Confusion with double negation and booleans][36856]
1985 * [rustc 1.12.0 fails with SIGSEGV in release mode (syn crate 0.8.0)][36875]
1986 * [Rustc 1.12.0 Windows build of `ethcore` crate fails with LLVM error][36924]
1987 * [1.12.0: High memory usage when linking in release mode with debug info][36926]
1988 * [Corrupted memory after updated to 1.12][36936]
1989 * ["Let NullaryConstructor = something;" causes internal compiler error: "tried to overwrite interned AdtDef"][37026]
1990 * [Fix ICE: inject bitcast if types mismatch for invokes/calls/stores][37112]
1991 * [debuginfo: Handle spread_arg case in MIR-trans in a more stable way.][37153]
1993 [36381]: https://github.com/rust-lang/rust/issues/36381
1994 [36856]: https://github.com/rust-lang/rust/issues/36856
1995 [36875]: https://github.com/rust-lang/rust/issues/36875
1996 [36924]: https://github.com/rust-lang/rust/issues/36924
1997 [36926]: https://github.com/rust-lang/rust/issues/36926
1998 [36936]: https://github.com/rust-lang/rust/issues/36936
1999 [37026]: https://github.com/rust-lang/rust/issues/37026
2000 [37112]: https://github.com/rust-lang/rust/issues/37112
2001 [37153]: https://github.com/rust-lang/rust/issues/37153
2004 Version 1.12.0 (2016-09-29)
2005 ===========================
2010 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)](https://github.com/rust-lang/rust/pull/34096).
2011 This translation pass is far simpler than the previous AST->LLVM pass, and
2012 creates opportunities to perform new optimizations directly on the MIR. It
2013 was previously described [on the Rust blog](https://blog.rust-lang.org/2016/04/19/MIR.html).
2014 * [`rustc` presents a new, more readable error format, along with
2015 machine-readable JSON error output for use by IDEs](https://github.com/rust-lang/rust/pull/35401).
2016 Most common editors supporting Rust have been updated to work with it. It was
2017 previously described [on the Rust blog](https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
2022 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)](https://github.com/rust-lang/rust/pull/34096).
2023 This translation pass is far simpler than the previous AST->LLVM pass, and
2024 creates opportunities to perform new optimizations directly on the MIR. It
2025 was previously described [on the Rust blog](https://blog.rust-lang.org/2016/04/19/MIR.html).
2026 * [Print the Rust target name, not the LLVM target name, with
2027 `--print target-list`](https://github.com/rust-lang/rust/pull/35489)
2028 * [The computation of `TypeId` is correct in some cases where it was previously
2029 producing inconsistent results](https://github.com/rust-lang/rust/pull/35267)
2030 * [The `mips-unknown-linux-gnu` target uses hardware floating point by default](https://github.com/rust-lang/rust/pull/34910)
2031 * [The `rustc` arguments, `--print target-cpus`, `--print target-features`,
2032 `--print relocation-models`, and `--print code-models` print the available
2033 options to the `-C target-cpu`, `-C target-feature`, `-C relocation-model` and
2034 `-C code-model` code generation arguments](https://github.com/rust-lang/rust/pull/34845)
2035 * [`rustc` supports three new MUSL targets on ARM: `arm-unknown-linux-musleabi`,
2036 `arm-unknown-linux-musleabihf`, and `armv7-unknown-linux-musleabihf`](https://github.com/rust-lang/rust/pull/35060).
2037 These targets produce statically-linked binaries. There are no binary release
2043 * [`rustc` presents a new, more readable error format, along with
2044 machine-readable JSON error output for use by IDEs](https://github.com/rust-lang/rust/pull/35401).
2045 Most common editors supporting Rust have been updated to work with it. It was
2046 previously described [on the Rust blog](https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
2047 * [In error descriptions, references are now described in plain English,
2048 instead of as "&-ptr"](https://github.com/rust-lang/rust/pull/35611)
2049 * [In error type descriptions, unknown numeric types are named `{integer}` or
2050 `{float}` instead of `_`](https://github.com/rust-lang/rust/pull/35080)
2051 * [`rustc` emits a clearer error when inner attributes follow a doc comment](https://github.com/rust-lang/rust/pull/34676)
2056 * [`macro_rules!` invocations can be made within `macro_rules!` invocations](https://github.com/rust-lang/rust/pull/34925)
2057 * [`macro_rules!` meta-variables are hygienic](https://github.com/rust-lang/rust/pull/35453)
2058 * [`macro_rules!` `tt` matchers can be reparsed correctly, making them much more
2059 useful](https://github.com/rust-lang/rust/pull/34908)
2060 * [`macro_rules!` `stmt` matchers correctly consume the entire contents when
2061 inside non-braces invocations](https://github.com/rust-lang/rust/pull/34886)
2062 * [Semicolons are properly required as statement delimiters inside
2063 `macro_rules!` invocations](https://github.com/rust-lang/rust/pull/34660)
2064 * [`cfg_attr` works on `path` attributes](https://github.com/rust-lang/rust/pull/34546)
2069 * [`Cell::as_ptr`](https://doc.rust-lang.org/std/cell/struct.Cell.html#method.as_ptr)
2070 * [`RefCell::as_ptr`](https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.as_ptr)
2071 * [`IpAddr::is_unspecified`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_unspecified)
2072 * [`IpAddr::is_loopback`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_loopback)
2073 * [`IpAddr::is_multicast`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_multicast)
2074 * [`Ipv4Addr::is_unspecified`](https://doc.rust-lang.org/std/net/struct.Ipv4Addr.html#method.is_unspecified)
2075 * [`Ipv6Addr::octets`](https://doc.rust-lang.org/std/net/struct.Ipv6Addr.html#method.octets)
2076 * [`LinkedList::contains`](https://doc.rust-lang.org/std/collections/linked_list/struct.LinkedList.html#method.contains)
2077 * [`VecDeque::contains`](https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.contains)
2078 * [`ExitStatusExt::from_raw`](https://doc.rust-lang.org/std/os/unix/process/trait.ExitStatusExt.html#tymethod.from_raw).
2079 Both on Unix and Windows.
2080 * [`Receiver::recv_timeout`](https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.recv_timeout)
2081 * [`RecvTimeoutError`](https://doc.rust-lang.org/std/sync/mpsc/enum.RecvTimeoutError.html)
2082 * [`BinaryHeap::peek_mut`](https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.peek_mut)
2083 * [`PeekMut`](https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html)
2084 * [`iter::Product`](https://doc.rust-lang.org/std/iter/trait.Product.html)
2085 * [`iter::Sum`](https://doc.rust-lang.org/std/iter/trait.Sum.html)
2086 * [`OccupiedEntry::remove_entry`](https://doc.rust-lang.org/std/collections/btree_map/struct.OccupiedEntry.html#method.remove_entry)
2087 * [`VacantEntry::into_key`](https://doc.rust-lang.org/std/collections/btree_map/struct.VacantEntry.html#method.into_key)
2092 * [The `format!` macro and friends now allow a single argument to be formatted
2093 in multiple styles](https://github.com/rust-lang/rust/pull/33642)
2094 * [The lifetime bounds on `[T]::binary_search_by` and
2095 `[T]::binary_search_by_key` have been adjusted to be more flexible](https://github.com/rust-lang/rust/pull/34762)
2096 * [`Option` implements `From` for its contained type](https://github.com/rust-lang/rust/pull/34828)
2097 * [`Cell`, `RefCell` and `UnsafeCell` implement `From` for their contained type](https://github.com/rust-lang/rust/pull/35392)
2098 * [`RwLock` panics if the reader count overflows](https://github.com/rust-lang/rust/pull/35378)
2099 * [`vec_deque::Drain`, `hash_map::Drain` and `hash_set::Drain` are covariant](https://github.com/rust-lang/rust/pull/35354)
2100 * [`vec::Drain` and `binary_heap::Drain` are covariant](https://github.com/rust-lang/rust/pull/34951)
2101 * [`Cow<str>` implements `FromIterator` for `char`, `&str` and `String`](https://github.com/rust-lang/rust/pull/35064)
2102 * [Sockets on Linux are correctly closed in subprocesses via `SOCK_CLOEXEC`](https://github.com/rust-lang/rust/pull/34946)
2103 * [`hash_map::Entry`, `hash_map::VacantEntry` and `hash_map::OccupiedEntry`
2104 implement `Debug`](https://github.com/rust-lang/rust/pull/34937)
2105 * [`btree_map::Entry`, `btree_map::VacantEntry` and `btree_map::OccupiedEntry`
2106 implement `Debug`](https://github.com/rust-lang/rust/pull/34885)
2107 * [`String` implements `AddAssign`](https://github.com/rust-lang/rust/pull/34890)
2108 * [Variadic `extern fn` pointers implement the `Clone`, `PartialEq`, `Eq`,
2109 `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and `fmt::Debug` traits](https://github.com/rust-lang/rust/pull/34879)
2110 * [`FileType` implements `Debug`](https://github.com/rust-lang/rust/pull/34757)
2111 * [References to `Mutex` and `RwLock` are unwind-safe](https://github.com/rust-lang/rust/pull/34756)
2112 * [`mpsc::sync_channel` `Receiver`s return any available message before
2113 reporting a disconnect](https://github.com/rust-lang/rust/pull/34731)
2114 * [Unicode definitions have been updated to 9.0](https://github.com/rust-lang/rust/pull/34599)
2115 * [`env` iterators implement `DoubleEndedIterator`](https://github.com/rust-lang/rust/pull/33312)
2120 * [Support local mirrors of registries](https://github.com/rust-lang/cargo/pull/2857)
2121 * [Add support for command aliases](https://github.com/rust-lang/cargo/pull/2679)
2122 * [Allow `opt-level="s"` / `opt-level="z"` in profile overrides](https://github.com/rust-lang/cargo/pull/3007)
2123 * [Make `cargo doc --open --target` work as expected](https://github.com/rust-lang/cargo/pull/2988)
2124 * [Speed up noop registry updates](https://github.com/rust-lang/cargo/pull/2974)
2125 * [Update OpenSSL](https://github.com/rust-lang/cargo/pull/2971)
2126 * [Fix `--panic=abort` with plugins](https://github.com/rust-lang/cargo/pull/2954)
2127 * [Always pass `-C metadata` to the compiler](https://github.com/rust-lang/cargo/pull/2946)
2128 * [Fix depending on git repos with workspaces](https://github.com/rust-lang/cargo/pull/2938)
2129 * [Add a `--lib` flag to `cargo new`](https://github.com/rust-lang/cargo/pull/2921)
2130 * [Add `http.cainfo` for custom certs](https://github.com/rust-lang/cargo/pull/2917)
2131 * [Indicate the compilation profile after compiling](https://github.com/rust-lang/cargo/pull/2909)
2132 * [Allow enabling features for dependencies with `--features`](https://github.com/rust-lang/cargo/pull/2876)
2133 * [Add `--jobs` flag to `cargo package`](https://github.com/rust-lang/cargo/pull/2867)
2134 * [Add `--dry-run` to `cargo publish`](https://github.com/rust-lang/cargo/pull/2849)
2135 * [Add support for `RUSTDOCFLAGS`](https://github.com/rust-lang/cargo/pull/2794)
2140 * [`panic::catch_unwind` is more optimized](https://github.com/rust-lang/rust/pull/35444)
2141 * [`panic::catch_unwind` no longer accesses thread-local storage on entry](https://github.com/rust-lang/rust/pull/34866)
2146 * [Test binaries now support a `--test-threads` argument to specify the number
2147 of threads used to run tests, and which acts the same as the
2148 `RUST_TEST_THREADS` environment variable](https://github.com/rust-lang/rust/pull/35414)
2149 * [The test runner now emits a warning when tests run over 60 seconds](https://github.com/rust-lang/rust/pull/35405)
2150 * [rustdoc: Fix methods in search results](https://github.com/rust-lang/rust/pull/34752)
2151 * [`rust-lldb` warns about unsupported versions of LLDB](https://github.com/rust-lang/rust/pull/34646)
2152 * [Rust releases now come with source packages that can be installed by rustup
2153 via `rustup component add rust-src`](https://github.com/rust-lang/rust/pull/34366).
2154 The resulting source code can be used by tools and IDES, located in the
2155 sysroot under `lib/rustlib/src`.
2160 * [The compiler can now be built against LLVM 3.9](https://github.com/rust-lang/rust/pull/35594)
2161 * Many minor improvements to the documentation.
2162 * [The Rust exception handling "personality" routine is now written in Rust](https://github.com/rust-lang/rust/pull/34832)
2167 * [When printing Windows `OsStr`s, unpaired surrogate codepoints are escaped
2168 with the lowercase format instead of the uppercase](https://github.com/rust-lang/rust/pull/35084)
2169 * [When formatting strings, if "precision" is specified, the "fill",
2170 "align" and "width" specifiers are no longer ignored](https://github.com/rust-lang/rust/pull/34544)
2171 * [The `Debug` impl for strings no longer escapes all non-ASCII characters](https://github.com/rust-lang/rust/pull/34485)
2174 Version 1.11.0 (2016-08-18)
2175 ===========================
2180 * [`cfg_attr` works on `path` attributes](https://github.com/rust-lang/rust/pull/34546)
2181 * [Support nested `cfg_attr` attributes](https://github.com/rust-lang/rust/pull/34216)
2182 * [Allow statement-generating braced macro invocations at the end of blocks](https://github.com/rust-lang/rust/pull/34436)
2183 * [Macros can be expanded inside of trait definitions](https://github.com/rust-lang/rust/pull/34213)
2184 * [`#[macro_use]` works properly when it is itself expanded from a macro](https://github.com/rust-lang/rust/pull/34032)
2189 * [`BinaryHeap::append`](https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.append)
2190 * [`BTreeMap::append`](https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.append)
2191 * [`BTreeMap::split_off`](https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.split_off)
2192 * [`BTreeSet::append`](https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.append)
2193 * [`BTreeSet::split_off`](https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.split_off)
2194 * [`f32::to_degrees`](https://doc.rust-lang.org/std/primitive.f32.html#method.to_degrees)
2195 (in libcore - previously stabilized in libstd)
2196 * [`f32::to_radians`](https://doc.rust-lang.org/std/primitive.f32.html#method.to_radians)
2197 (in libcore - previously stabilized in libstd)
2198 * [`f64::to_degrees`](https://doc.rust-lang.org/std/primitive.f64.html#method.to_degrees)
2199 (in libcore - previously stabilized in libstd)
2200 * [`f64::to_radians`](https://doc.rust-lang.org/std/primitive.f64.html#method.to_radians)
2201 (in libcore - previously stabilized in libstd)
2202 * [`Iterator::sum`](https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
2203 * [`Iterator::product`](https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
2204 * [`Cell::get_mut`](https://doc.rust-lang.org/std/cell/struct.Cell.html#method.get_mut)
2205 * [`RefCell::get_mut`](https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.get_mut)
2210 * [The `thread_local!` macro supports multiple definitions in a single
2211 invocation, and can apply attributes](https://github.com/rust-lang/rust/pull/34077)
2212 * [`Cow` implements `Default`](https://github.com/rust-lang/rust/pull/34305)
2213 * [`Wrapping` implements binary, octal, lower-hex and upper-hex
2214 `Display` formatting](https://github.com/rust-lang/rust/pull/34190)
2215 * [The range types implement `Hash`](https://github.com/rust-lang/rust/pull/34180)
2216 * [`lookup_host` ignores unknown address types](https://github.com/rust-lang/rust/pull/34067)
2217 * [`assert_eq!` accepts a custom error message, like `assert!` does](https://github.com/rust-lang/rust/pull/33976)
2218 * [The main thread is now called "main" instead of "<main>"](https://github.com/rust-lang/rust/pull/33803)
2223 * [Disallow specifying features of transitive deps](https://github.com/rust-lang/cargo/pull/2821)
2224 * [Add color support for Windows consoles](https://github.com/rust-lang/cargo/pull/2804)
2225 * [Fix `harness = false` on `[lib]` sections](https://github.com/rust-lang/cargo/pull/2795)
2226 * [Don't panic when `links` contains a '.'](https://github.com/rust-lang/cargo/pull/2787)
2227 * [Build scripts can emit warnings](https://github.com/rust-lang/cargo/pull/2630),
2228 and `-vv` prints warnings for all crates.
2229 * [Ignore file locks on OS X NFS mounts](https://github.com/rust-lang/cargo/pull/2720)
2230 * [Don't warn about `package.metadata` keys](https://github.com/rust-lang/cargo/pull/2668).
2231 This provides room for expansion by arbitrary tools.
2232 * [Add support for cdylib crate types](https://github.com/rust-lang/cargo/pull/2741)
2233 * [Prevent publishing crates when files are dirty](https://github.com/rust-lang/cargo/pull/2781)
2234 * [Don't fetch all crates on clean](https://github.com/rust-lang/cargo/pull/2704)
2235 * [Propagate --color option to rustc](https://github.com/rust-lang/cargo/pull/2779)
2236 * [Fix `cargo doc --open` on Windows](https://github.com/rust-lang/cargo/pull/2780)
2237 * [Improve autocompletion](https://github.com/rust-lang/cargo/pull/2772)
2238 * [Configure colors of stderr as well as stdout](https://github.com/rust-lang/cargo/pull/2739)
2243 * [Caching projections speeds up type check dramatically for some
2244 workloads](https://github.com/rust-lang/rust/pull/33816)
2245 * [The default `HashMap` hasher is SipHash 1-3 instead of SipHash 2-4](https://github.com/rust-lang/rust/pull/33940)
2246 This hasher is faster, but is believed to provide sufficient
2247 protection from collision attacks.
2248 * [Comparison of `Ipv4Addr` is 10x faster](https://github.com/rust-lang/rust/pull/33891)
2253 * [Fix empty implementation section on some module pages](https://github.com/rust-lang/rust/pull/34536)
2254 * [Fix inlined renamed reexports in import lists](https://github.com/rust-lang/rust/pull/34479)
2255 * [Fix search result layout for enum variants and struct fields](https://github.com/rust-lang/rust/pull/34477)
2256 * [Fix issues with source links to external crates](https://github.com/rust-lang/rust/pull/34387)
2257 * [Fix redirect pages for renamed reexports](https://github.com/rust-lang/rust/pull/34245)
2262 * [rustc is better at finding the MSVC toolchain](https://github.com/rust-lang/rust/pull/34492)
2263 * [When emitting debug info, rustc emits frame pointers for closures,
2264 shims and glue, as it does for all other functions](https://github.com/rust-lang/rust/pull/33909)
2265 * [rust-lldb warns about unsupported versions of LLDB](https://github.com/rust-lang/rust/pull/34646)
2266 * Many more errors have been given error codes and extended
2268 * API documentation continues to be improved, with many new examples
2273 * [rustc no longer hangs when dependencies recursively re-export
2274 submodules](https://github.com/rust-lang/rust/pull/34542)
2275 * [rustc requires LLVM 3.7+](https://github.com/rust-lang/rust/pull/34104)
2276 * [The 'How Safe and Unsafe Interact' chapter of The Rustonomicon was
2277 rewritten](https://github.com/rust-lang/rust/pull/33895)
2278 * [rustc support 16-bit pointer sizes](https://github.com/rust-lang/rust/pull/33460).
2279 No targets use this yet, but it works toward AVR support.
2284 * [`const`s and `static`s may not have unsized types](https://github.com/rust-lang/rust/pull/34443)
2285 * [The new follow-set rules that place restrictions on `macro_rules!`
2286 in order to ensure syntax forward-compatibility have been enabled](https://github.com/rust-lang/rust/pull/33982)
2287 This was an [amendment to RFC 550](https://github.com/rust-lang/rfcs/pull/1384),
2288 and has been a warning since 1.10.
2289 * [`cfg` attribute process has been refactored to fix various bugs](https://github.com/rust-lang/rust/pull/33706).
2290 This causes breakage in some corner cases.
2293 Version 1.10.0 (2016-07-07)
2294 ===========================
2299 * [Allow `concat_idents!` in type positions as well as in expression
2300 positions](https://github.com/rust-lang/rust/pull/33735).
2301 * [`Copy` types are required to have a trivial implementation of `Clone`](https://github.com/rust-lang/rust/pull/33420).
2302 [RFC 1521](https://github.com/rust-lang/rfcs/blob/master/text/1521-copy-clone-semantics.md).
2303 * [Single-variant enums support the `#[repr(..)]` attribute](https://github.com/rust-lang/rust/pull/33355).
2304 * [Fix `#[derive(RustcEncodable)]` in the presence of other `encode` methods](https://github.com/rust-lang/rust/pull/32908).
2305 * [`panic!` can be converted to a runtime abort with the
2306 `-C panic=abort` flag](https://github.com/rust-lang/rust/pull/32900).
2307 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
2308 * [Add a new crate type, 'cdylib'](https://github.com/rust-lang/rust/pull/33553).
2309 cdylibs are dynamic libraries suitable for loading by non-Rust hosts.
2310 [RFC 1510](https://github.com/rust-lang/rfcs/blob/master/text/1510-rdylib.md).
2311 Note that Cargo does not yet directly support cdylibs.
2316 * `os::windows::fs::OpenOptionsExt::access_mode`
2317 * `os::windows::fs::OpenOptionsExt::share_mode`
2318 * `os::windows::fs::OpenOptionsExt::custom_flags`
2319 * `os::windows::fs::OpenOptionsExt::attributes`
2320 * `os::windows::fs::OpenOptionsExt::security_qos_flags`
2321 * `os::unix::fs::OpenOptionsExt::custom_flags`
2322 * [`sync::Weak::new`](http://doc.rust-lang.org/alloc/arc/struct.Weak.html#method.new)
2323 * `Default for sync::Weak`
2324 * [`panic::set_hook`](http://doc.rust-lang.org/std/panic/fn.set_hook.html)
2325 * [`panic::take_hook`](http://doc.rust-lang.org/std/panic/fn.take_hook.html)
2326 * [`panic::PanicInfo`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html)
2327 * [`panic::PanicInfo::payload`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.payload)
2328 * [`panic::PanicInfo::location`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.location)
2329 * [`panic::Location`](http://doc.rust-lang.org/std/panic/struct.Location.html)
2330 * [`panic::Location::file`](http://doc.rust-lang.org/std/panic/struct.Location.html#method.file)
2331 * [`panic::Location::line`](http://doc.rust-lang.org/std/panic/struct.Location.html#method.line)
2332 * [`ffi::CStr::from_bytes_with_nul`](http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul)
2333 * [`ffi::CStr::from_bytes_with_nul_unchecked`](http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul_unchecked)
2334 * [`ffi::FromBytesWithNulError`](http://doc.rust-lang.org/std/ffi/struct.FromBytesWithNulError.html)
2335 * [`fs::Metadata::modified`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.modified)
2336 * [`fs::Metadata::accessed`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.accessed)
2337 * [`fs::Metadata::created`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.created)
2338 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange`
2339 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange_weak`
2340 * `collections::{btree,hash}_map::{Occupied,Vacant,}Entry::key`
2341 * `os::unix::net::{UnixStream, UnixListener, UnixDatagram, SocketAddr}`
2342 * [`SocketAddr::is_unnamed`](http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.is_unnamed)
2343 * [`SocketAddr::as_pathname`](http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.as_pathname)
2344 * [`UnixStream::connect`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.connect)
2345 * [`UnixStream::pair`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.pair)
2346 * [`UnixStream::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.try_clone)
2347 * [`UnixStream::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.local_addr)
2348 * [`UnixStream::peer_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.peer_addr)
2349 * [`UnixStream::set_read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
2350 * [`UnixStream::set_write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
2351 * [`UnixStream::read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
2352 * [`UnixStream::write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
2353 * [`UnixStream::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.set_nonblocking)
2354 * [`UnixStream::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.take_error)
2355 * [`UnixStream::shutdown`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.shutdown)
2356 * Read/Write/RawFd impls for `UnixStream`
2357 * [`UnixListener::bind`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.bind)
2358 * [`UnixListener::accept`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.accept)
2359 * [`UnixListener::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.try_clone)
2360 * [`UnixListener::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.local_addr)
2361 * [`UnixListener::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.set_nonblocking)
2362 * [`UnixListener::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.take_error)
2363 * [`UnixListener::incoming`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.incoming)
2364 * RawFd impls for `UnixListener`
2365 * [`UnixDatagram::bind`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.bind)
2366 * [`UnixDatagram::unbound`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.unbound)
2367 * [`UnixDatagram::pair`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.pair)
2368 * [`UnixDatagram::connect`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.connect)
2369 * [`UnixDatagram::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.try_clone)
2370 * [`UnixDatagram::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.local_addr)
2371 * [`UnixDatagram::peer_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.peer_addr)
2372 * [`UnixDatagram::recv_from`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv_from)
2373 * [`UnixDatagram::recv`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv)
2374 * [`UnixDatagram::send_to`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send_to)
2375 * [`UnixDatagram::send`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send)
2376 * [`UnixDatagram::set_read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_read_timeout)
2377 * [`UnixDatagram::set_write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_write_timeout)
2378 * [`UnixDatagram::read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.read_timeout)
2379 * [`UnixDatagram::write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.write_timeout)
2380 * [`UnixDatagram::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_nonblocking)
2381 * [`UnixDatagram::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.take_error)
2382 * [`UnixDatagram::shutdown`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.shutdown)
2383 * RawFd impls for `UnixDatagram`
2384 * `{BTree,Hash}Map::values_mut`
2385 * [`<[_]>::binary_search_by_key`](http://doc.rust-lang.org/beta/std/primitive.slice.html#method.binary_search_by_key)
2390 * [The `abs_sub` method of floats is deprecated](https://github.com/rust-lang/rust/pull/33664).
2391 The semantics of this minor method are subtle and probably not what
2393 * [Add implementation of Ord for Cell<T> and RefCell<T> where T: Ord](https://github.com/rust-lang/rust/pull/33306).
2394 * [On Linux, if `HashMap`s can't be initialized with `getrandom` they
2395 will fall back to `/dev/urandom` temporarily to avoid blocking
2396 during early boot](https://github.com/rust-lang/rust/pull/33086).
2397 * [Implemented negation for wrapping numerals](https://github.com/rust-lang/rust/pull/33067).
2398 * [Implement `Clone` for `binary_heap::IntoIter`](https://github.com/rust-lang/rust/pull/33050).
2399 * [Implement `Display` and `Hash` for `std::num::Wrapping`](https://github.com/rust-lang/rust/pull/33023).
2400 * [Add `Default` implementation for `&CStr`, `CString`](https://github.com/rust-lang/rust/pull/32990).
2401 * [Implement `From<Vec<T>>` and `Into<Vec<T>>` for `VecDeque<T>`](https://github.com/rust-lang/rust/pull/32866).
2402 * [Implement `Default` for `UnsafeCell`, `fmt::Error`, `Condvar`,
2403 `Mutex`, `RwLock`](https://github.com/rust-lang/rust/pull/32785).
2407 * [Cargo.toml supports the `profile.*.panic` option](https://github.com/rust-lang/cargo/pull/2687).
2408 This controls the runtime behavior of the `panic!` macro
2409 and can be either "unwind" (the default), or "abort".
2410 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
2411 * [Don't throw away errors with `-p` arguments](https://github.com/rust-lang/cargo/pull/2723).
2412 * [Report status to stderr instead of stdout](https://github.com/rust-lang/cargo/pull/2693).
2413 * [Build scripts are passed a `CARGO_MANIFEST_LINKS` environment
2414 variable that corresponds to the `links` field of the manifest](https://github.com/rust-lang/cargo/pull/2710).
2415 * [Ban keywords from crate names](https://github.com/rust-lang/cargo/pull/2707).
2416 * [Canonicalize `CARGO_HOME` on Windows](https://github.com/rust-lang/cargo/pull/2604).
2417 * [Retry network requests](https://github.com/rust-lang/cargo/pull/2396).
2418 By default they are retried twice, which can be customized with the
2419 `net.retry` value in `.cargo/config`.
2420 * [Don't print extra error info for failing subcommands](https://github.com/rust-lang/cargo/pull/2674).
2421 * [Add `--force` flag to `cargo install`](https://github.com/rust-lang/cargo/pull/2405).
2422 * [Don't use `flock` on NFS mounts](https://github.com/rust-lang/cargo/pull/2623).
2423 * [Prefer building `cargo install` artifacts in temporary directories](https://github.com/rust-lang/cargo/pull/2610).
2424 Makes it possible to install multiple crates in parallel.
2425 * [Add `cargo test --doc`](https://github.com/rust-lang/cargo/pull/2578).
2426 * [Add `cargo --explain`](https://github.com/rust-lang/cargo/pull/2551).
2427 * [Don't print warnings when `-q` is passed](https://github.com/rust-lang/cargo/pull/2576).
2428 * [Add `cargo doc --lib` and `--bin`](https://github.com/rust-lang/cargo/pull/2577).
2429 * [Don't require build script output to be UTF-8](https://github.com/rust-lang/cargo/pull/2560).
2430 * [Correctly attempt multiple git usernames](https://github.com/rust-lang/cargo/pull/2584).
2435 * [rustc memory usage was reduced by refactoring the context used for
2436 type checking](https://github.com/rust-lang/rust/pull/33425).
2437 * [Speed up creation of `HashMap`s by caching the random keys used
2438 to initialize the hash state](https://github.com/rust-lang/rust/pull/33318).
2439 * [The `find` implementation for `Chain` iterators is 2x faster](https://github.com/rust-lang/rust/pull/33289).
2440 * [Trait selection optimizations speed up type checking by 15%](https://github.com/rust-lang/rust/pull/33138).
2441 * [Efficient trie lookup for boolean Unicode properties](https://github.com/rust-lang/rust/pull/33098).
2442 10x faster than the previous lookup tables.
2443 * [Special case `#[derive(Copy, Clone)]` to avoid bloat](https://github.com/rust-lang/rust/pull/31414).
2448 * Many incremental improvements to documentation and rustdoc.
2449 * [rustdoc: List blanket trait impls](https://github.com/rust-lang/rust/pull/33514).
2450 * [rustdoc: Clean up ABI rendering](https://github.com/rust-lang/rust/pull/33151).
2451 * [Indexing with the wrong type produces a more informative error](https://github.com/rust-lang/rust/pull/33401).
2452 * [Improve diagnostics for constants being used in irrefutable patterns](https://github.com/rust-lang/rust/pull/33406).
2453 * [When many method candidates are in scope limit the suggestions to 10](https://github.com/rust-lang/rust/pull/33338).
2454 * [Remove confusing suggestion when calling a `fn` type](https://github.com/rust-lang/rust/pull/33325).
2455 * [Do not suggest changing `&mut self` to `&mut mut self`](https://github.com/rust-lang/rust/pull/33319).
2460 * [Update i686-linux-android features to match Android ABI](https://github.com/rust-lang/rust/pull/33651).
2461 * [Update aarch64-linux-android features to match Android ABI](https://github.com/rust-lang/rust/pull/33500).
2462 * [`std` no longer prints backtraces on platforms where the running
2463 module must be loaded with `env::current_exe`, which can't be relied
2464 on](https://github.com/rust-lang/rust/pull/33554).
2465 * This release includes std binaries for the i586-unknown-linux-gnu,
2466 i686-unknown-linux-musl, and armv7-linux-androideabi targets. The
2467 i586 target is for old x86 hardware without SSE2, and the armv7
2468 target is for Android running on modern ARM architectures.
2469 * [The `rust-gdb` and `rust-lldb` scripts are distributed on all
2470 Unix platforms](https://github.com/rust-lang/rust/pull/32835).
2471 * [On Unix the runtime aborts by calling `libc::abort` instead of
2472 generating an illegal instruction](https://github.com/rust-lang/rust/pull/31457).
2473 * [Rust is now bootstrapped from the previous release of Rust,
2474 instead of a snapshot from an arbitrary commit](https://github.com/rust-lang/rust/pull/32942).
2479 * [`AtomicBool` is now bool-sized, not word-sized](https://github.com/rust-lang/rust/pull/33579).
2480 * [`target_env` for Linux ARM targets is just `gnu`, not
2481 `gnueabihf`, `gnueabi`, etc](https://github.com/rust-lang/rust/pull/33403).
2482 * [Consistently panic on overflow in `Duration::new`](https://github.com/rust-lang/rust/pull/33072).
2483 * [Change `String::truncate` to panic less](https://github.com/rust-lang/rust/pull/32977).
2484 * [Add `:block` to the follow set for `:ty` and `:path`](https://github.com/rust-lang/rust/pull/32945).
2485 Affects how macros are parsed.
2486 * [Fix macro hygiene bug](https://github.com/rust-lang/rust/pull/32923).
2487 * [Feature-gated attributes on macro-generated macro invocations are
2488 now rejected](https://github.com/rust-lang/rust/pull/32791).
2489 * [Suppress fallback and ambiguity errors during type inference](https://github.com/rust-lang/rust/pull/32258).
2490 This caused some minor changes to type inference.
2493 Version 1.9.0 (2016-05-26)
2494 ==========================
2499 * The `#[deprecated]` attribute when applied to an API will generate
2500 warnings when used. The warnings may be suppressed with
2501 `#[allow(deprecated)]`. [RFC 1270].
2502 * [`fn` item types are zero sized, and each `fn` names a unique
2503 type][1.9fn]. This will break code that transmutes `fn`s, so calling
2504 `transmute` on a `fn` type will generate a warning for a few cycles,
2505 then will be converted to an error.
2506 * [Field and method resolution understand visibility, so private
2507 fields and methods cannot prevent the proper use of public fields
2508 and methods][1.9fv].
2509 * [The parser considers unicode codepoints in the
2510 `PATTERN_WHITE_SPACE` category to be whitespace][1.9ws].
2516 * [`std::panic::catch_unwind`][] (renamed from `recover`)
2517 * [`std::panic::resume_unwind`][] (renamed from `propagate`)
2518 * [`std::panic::AssertUnwindSafe`][] (renamed from `AssertRecoverSafe`)
2519 * [`std::panic::UnwindSafe`][] (renamed from `RecoverSafe`)
2520 * [`str::is_char_boundary`]
2521 * [`<*const T>::as_ref`]
2522 * [`<*mut T>::as_ref`]
2523 * [`<*mut T>::as_mut`]
2524 * [`AsciiExt::make_ascii_uppercase`]
2525 * [`AsciiExt::make_ascii_lowercase`]
2526 * [`char::decode_utf16`]
2527 * [`char::DecodeUtf16`]
2528 * [`char::DecodeUtf16Error`]
2529 * [`char::DecodeUtf16Error::unpaired_surrogate`]
2530 * [`BTreeSet::take`]
2531 * [`BTreeSet::replace`]
2534 * [`HashSet::replace`]
2536 * [`OsString::with_capacity`]
2537 * [`OsString::clear`]
2538 * [`OsString::capacity`]
2539 * [`OsString::reserve`]
2540 * [`OsString::reserve_exact`]
2541 * [`OsStr::is_empty`]
2543 * [`std::os::unix::thread`]
2546 * [`JoinHandleExt::as_pthread_t`]
2547 * [`JoinHandleExt::into_pthread_t`]
2548 * [`HashSet::hasher`]
2549 * [`HashMap::hasher`]
2550 * [`CommandExt::exec`]
2551 * [`File::try_clone`]
2552 * [`SocketAddr::set_ip`]
2553 * [`SocketAddr::set_port`]
2554 * [`SocketAddrV4::set_ip`]
2555 * [`SocketAddrV4::set_port`]
2556 * [`SocketAddrV6::set_ip`]
2557 * [`SocketAddrV6::set_port`]
2558 * [`SocketAddrV6::set_flowinfo`]
2559 * [`SocketAddrV6::set_scope_id`]
2560 * [`slice::copy_from_slice`]
2561 * [`ptr::read_volatile`]
2562 * [`ptr::write_volatile`]
2563 * [`OpenOptions::create_new`]
2564 * [`TcpStream::set_nodelay`]
2565 * [`TcpStream::nodelay`]
2566 * [`TcpStream::set_ttl`]
2567 * [`TcpStream::ttl`]
2568 * [`TcpStream::set_only_v6`]
2569 * [`TcpStream::only_v6`]
2570 * [`TcpStream::take_error`]
2571 * [`TcpStream::set_nonblocking`]
2572 * [`TcpListener::set_ttl`]
2573 * [`TcpListener::ttl`]
2574 * [`TcpListener::set_only_v6`]
2575 * [`TcpListener::only_v6`]
2576 * [`TcpListener::take_error`]
2577 * [`TcpListener::set_nonblocking`]
2578 * [`UdpSocket::set_broadcast`]
2579 * [`UdpSocket::broadcast`]
2580 * [`UdpSocket::set_multicast_loop_v4`]
2581 * [`UdpSocket::multicast_loop_v4`]
2582 * [`UdpSocket::set_multicast_ttl_v4`]
2583 * [`UdpSocket::multicast_ttl_v4`]
2584 * [`UdpSocket::set_multicast_loop_v6`]
2585 * [`UdpSocket::multicast_loop_v6`]
2586 * [`UdpSocket::set_multicast_ttl_v6`]
2587 * [`UdpSocket::multicast_ttl_v6`]
2588 * [`UdpSocket::set_ttl`]
2589 * [`UdpSocket::ttl`]
2590 * [`UdpSocket::set_only_v6`]
2591 * [`UdpSocket::only_v6`]
2592 * [`UdpSocket::join_multicast_v4`]
2593 * [`UdpSocket::join_multicast_v6`]
2594 * [`UdpSocket::leave_multicast_v4`]
2595 * [`UdpSocket::leave_multicast_v6`]
2596 * [`UdpSocket::take_error`]
2597 * [`UdpSocket::connect`]
2598 * [`UdpSocket::send`]
2599 * [`UdpSocket::recv`]
2600 * [`UdpSocket::set_nonblocking`]
2605 * [`std::sync::Once` is poisoned if its initialization function
2607 * [`cell::Ref` and `cell::RefMut` can contain unsized types][1.9cu].
2608 * [Most types implement `fmt::Debug`][1.9db].
2609 * [The default buffer size used by `BufReader` and `BufWriter` was
2610 reduced to 8K, from 64K][1.9bf]. This is in line with the buffer size
2611 used by other languages.
2612 * [`Instant`, `SystemTime` and `Duration` implement `+=` and `-=`.
2613 `Duration` additionally implements `*=` and `/=`][1.9ta].
2614 * [`Skip` is a `DoubleEndedIterator`][1.9sk].
2615 * [`From<[u8; 4]>` is implemented for `Ipv4Addr`][1.9fi].
2616 * [`Chain` implements `BufRead`][1.9ch].
2617 * [`HashMap`, `HashSet` and iterators are covariant][1.9hc].
2622 * [Cargo can now run concurrently][1.9cc].
2623 * [Top-level overrides allow specific revisions of crates to be
2624 overridden through the entire crate graph][1.9ct]. This is intended
2625 to make upgrades easier for large projects, by allowing crates to be
2626 forked temporarily until they've been upgraded and republished.
2627 * [Cargo exports a `CARGO_PKG_AUTHORS` environment variable][1.9cp].
2628 * [Cargo will pass the contents of the `RUSTFLAGS` variable to `rustc`
2629 on the commandline][1.9cf]. `rustc` arguments can also be specified
2630 in the `build.rustflags` configuration key.
2635 * [The time complexity of comparing variables for equivalence during type
2636 unification is reduced from _O_(_n_!) to _O_(_n_)][1.9tu]. This leads
2637 to major compilation time improvement in some scenarios.
2638 * [`ToString` is specialized for `str`, giving it the same performance
2639 as `to_owned`][1.9ts].
2640 * [Spawning processes with `Command::output` no longer creates extra
2642 * [`#[derive(PartialEq)]` and `#[derive(PartialOrd)]` emit less code
2643 for C-like enums][1.9cl].
2648 * [Passing the `--quiet` flag to a test runner will produce
2649 much-abbreviated output][1.9q].
2650 * The Rust Project now publishes std binaries for the
2651 `mips-unknown-linux-musl`, `mipsel-unknown-linux-musl`, and
2652 `i586-pc-windows-msvc` targets.
2657 * [`std::sync::Once` is poisoned if its initialization function
2659 * [It is illegal to define methods with the same name in overlapping
2660 inherent `impl` blocks][1.9sn].
2661 * [`fn` item types are zero sized, and each `fn` names a unique
2662 type][1.9fn]. This will break code that transmutes `fn`s, so calling
2663 `transmute` on a `fn` type will generate a warning for a few cycles,
2664 then will be converted to an error.
2665 * [Improvements to const evaluation may trigger new errors when integer
2666 literals are out of range][1.9ce].
2669 [1.9bf]: https://github.com/rust-lang/rust/pull/32695
2670 [1.9cc]: https://github.com/rust-lang/cargo/pull/2486
2671 [1.9ce]: https://github.com/rust-lang/rust/pull/30587
2672 [1.9cf]: https://github.com/rust-lang/cargo/pull/2241
2673 [1.9ch]: https://github.com/rust-lang/rust/pull/32541
2674 [1.9cl]: https://github.com/rust-lang/rust/pull/31977
2675 [1.9cp]: https://github.com/rust-lang/cargo/pull/2465
2676 [1.9ct]: https://github.com/rust-lang/cargo/pull/2385
2677 [1.9cu]: https://github.com/rust-lang/rust/pull/32652
2678 [1.9db]: https://github.com/rust-lang/rust/pull/32054
2679 [1.9fi]: https://github.com/rust-lang/rust/pull/32050
2680 [1.9fn]: https://github.com/rust-lang/rust/pull/31710
2681 [1.9fv]: https://github.com/rust-lang/rust/pull/31938
2682 [1.9hc]: https://github.com/rust-lang/rust/pull/32635
2683 [1.9o]: https://github.com/rust-lang/rust/pull/32325
2684 [1.9q]: https://github.com/rust-lang/rust/pull/31887
2685 [1.9sk]: https://github.com/rust-lang/rust/pull/31700
2686 [1.9sn]: https://github.com/rust-lang/rust/pull/31925
2687 [1.9sp]: https://github.com/rust-lang/rust/pull/31618
2688 [1.9ta]: https://github.com/rust-lang/rust/pull/32448
2689 [1.9ts]: https://github.com/rust-lang/rust/pull/32586
2690 [1.9tu]: https://github.com/rust-lang/rust/pull/32062
2691 [1.9ws]: https://github.com/rust-lang/rust/pull/29734
2692 [RFC 1270]: https://github.com/rust-lang/rfcs/blob/master/text/1270-deprecation.md
2693 [`<*const T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
2694 [`<*mut T>::as_mut`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_mut
2695 [`<*mut T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
2696 [`slice::copy_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.copy_from_slice
2697 [`AsciiExt::make_ascii_lowercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_lowercase
2698 [`AsciiExt::make_ascii_uppercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_uppercase
2699 [`BTreeSet::get`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.get
2700 [`BTreeSet::replace`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.replace
2701 [`BTreeSet::take`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.take
2702 [`CommandExt::exec`]: http://doc.rust-lang.org/nightly/std/os/unix/process/trait.CommandExt.html#tymethod.exec
2703 [`File::try_clone`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html#method.try_clone
2704 [`HashMap::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.hasher
2705 [`HashSet::get`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.get
2706 [`HashSet::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.hasher
2707 [`HashSet::replace`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.replace
2708 [`HashSet::take`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.take
2709 [`JoinHandleExt::as_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.as_pthread_t
2710 [`JoinHandleExt::into_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.into_pthread_t
2711 [`JoinHandleExt`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html
2712 [`OpenOptions::create_new`]: http://doc.rust-lang.org/nightly/std/fs/struct.OpenOptions.html#method.create_new
2713 [`OsStr::is_empty`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.is_empty
2714 [`OsStr::len`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.len
2715 [`OsString::capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.capacity
2716 [`OsString::clear`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.clear
2717 [`OsString::reserve_exact`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve_exact
2718 [`OsString::reserve`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve
2719 [`OsString::with_capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.with_capacity
2720 [`RawPthread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/type.RawPthread.html
2721 [`SocketAddr::set_ip`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_ip
2722 [`SocketAddr::set_port`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_port
2723 [`SocketAddrV4::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_ip
2724 [`SocketAddrV4::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_port
2725 [`SocketAddrV6::set_flowinfo`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_flowinfo
2726 [`SocketAddrV6::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_ip
2727 [`SocketAddrV6::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_port
2728 [`SocketAddrV6::set_scope_id`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_scope_id
2729 [`TcpListener::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
2730 [`TcpListener::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
2731 [`TcpListener::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
2732 [`TcpListener::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
2733 [`TcpListener::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
2734 [`TcpListener::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
2735 [`TcpStream::nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.nodelay
2736 [`TcpStream::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
2737 [`TcpStream::set_nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nodelay
2738 [`TcpStream::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
2739 [`TcpStream::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
2740 [`TcpStream::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
2741 [`TcpStream::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
2742 [`TcpStream::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
2743 [`UdpSocket::broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.broadcast
2744 [`UdpSocket::connect`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.connect
2745 [`UdpSocket::join_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v4
2746 [`UdpSocket::join_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v6
2747 [`UdpSocket::leave_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v4
2748 [`UdpSocket::leave_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v6
2749 [`UdpSocket::multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v4
2750 [`UdpSocket::multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v6
2751 [`UdpSocket::multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v4
2752 [`UdpSocket::multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v6
2753 [`UdpSocket::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.only_v6
2754 [`UdpSocket::recv`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.recv
2755 [`UdpSocket::send`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.send
2756 [`UdpSocket::set_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_broadcast
2757 [`UdpSocket::set_multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v4
2758 [`UdpSocket::set_multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v6
2759 [`UdpSocket::set_multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v4
2760 [`UdpSocket::set_multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v6
2761 [`UdpSocket::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_nonblocking
2762 [`UdpSocket::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_only_v6
2763 [`UdpSocket::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_ttl
2764 [`UdpSocket::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.take_error
2765 [`UdpSocket::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.ttl
2766 [`char::DecodeUtf16Error::unpaired_surrogate`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html#method.unpaired_surrogate
2767 [`char::DecodeUtf16Error`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html
2768 [`char::DecodeUtf16`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16.html
2769 [`char::decode_utf16`]: http://doc.rust-lang.org/nightly/std/char/fn.decode_utf16.html
2770 [`ptr::read_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.read_volatile.html
2771 [`ptr::write_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.write_volatile.html
2772 [`std::os::unix::thread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/index.html
2773 [`std::panic::AssertUnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/struct.AssertUnwindSafe.html
2774 [`std::panic::UnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/trait.UnwindSafe.html
2775 [`std::panic::catch_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.catch_unwind.html
2776 [`std::panic::resume_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.resume_unwind.html
2777 [`std::panic`]: http://doc.rust-lang.org/nightly/std/panic/index.html
2778 [`str::is_char_boundary`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.is_char_boundary
2781 Version 1.8.0 (2016-04-14)
2782 ==========================
2787 * Rust supports overloading of compound assignment statements like
2788 `+=` by implementing the [`AddAssign`], [`SubAssign`],
2789 [`MulAssign`], [`DivAssign`], [`RemAssign`], [`BitAndAssign`],
2790 [`BitOrAssign`], [`BitXorAssign`], [`ShlAssign`], or [`ShrAssign`]
2792 * Empty structs can be defined with braces, as in `struct Foo { }`, in
2793 addition to the non-braced form, `struct Foo;`. [RFC 218].
2799 * [`str::encode_utf16`][] (renamed from `utf16_units`)
2800 * [`str::EncodeUtf16`][] (renamed from `Utf16Units`)
2803 * [`ptr::drop_in_place`]
2805 * [`time::SystemTime`]
2807 * [`Instant::duration_since`][] (renamed from `duration_from_earlier`)
2808 * [`Instant::elapsed`]
2809 * [`SystemTime::now`]
2810 * [`SystemTime::duration_since`][] (renamed from `duration_from_earlier`)
2811 * [`SystemTime::elapsed`]
2812 * Various `Add`/`Sub` impls for `Time` and `SystemTime`
2813 * [`SystemTimeError`]
2814 * [`SystemTimeError::duration`]
2815 * Various impls for `SystemTimeError`
2817 * [`AddAssign`], [`SubAssign`], [`MulAssign`], [`DivAssign`],
2818 [`RemAssign`], [`BitAndAssign`], [`BitOrAssign`],
2819 [`BitXorAssign`], [`ShlAssign`], [`ShrAssign`].
2820 * [The `write!` and `writeln!` macros correctly emit errors if any of
2821 their arguments can't be formatted][1.8w].
2822 * [Various I/O functions support large files on 32-bit Linux][1.8l].
2823 * [The Unix-specific `raw` modules, which contain a number of
2824 redefined C types are deprecated][1.8r], including `os::raw::unix`,
2825 `os::raw::macos`, and `os::raw::linux`. These modules defined types
2826 such as `ino_t` and `dev_t`. The inconsistency of these definitions
2827 across platforms was making it difficult to implement `std`
2828 correctly. Those that need these definitions should use the `libc`
2830 * The Unix-specific `MetadataExt` traits, including
2831 `os::unix::fs::MetadataExt`, which expose values such as inode
2832 numbers [no longer return platform-specific types][1.8r], but
2833 instead return widened integers. [RFC 1415].
2834 * [`btree_set::{IntoIter, Iter, Range}` are covariant][1.8cv].
2835 * [Atomic loads and stores are not volatile][1.8a].
2836 * [All types in `sync::mpsc` implement `fmt::Debug`][1.8mp].
2841 * [Inlining hash functions lead to a 3% compile-time improvement in
2842 some workloads][1.8h].
2843 * When using jemalloc, its symbols are [unprefixed so that it
2844 overrides the libc malloc implementation][1.8h]. This means that for
2845 rustc, LLVM is now using jemalloc, which results in a 6%
2846 compile-time improvement on a specific workload.
2847 * [Avoid quadratic growth in function size due to cleanups][1.8cu].
2852 * [32-bit MSVC builds finally implement unwinding][1.8ms].
2853 i686-pc-windows-msvc is now considered a tier-1 platform.
2854 * [The `--print targets` flag prints a list of supported targets][1.8t].
2855 * [The `--print cfg` flag prints the `cfg`s defined for the current
2857 * [`rustc` can be built with an new Cargo-based build system, written
2858 in Rust][1.8b]. It will eventually replace Rust's Makefile-based
2859 build system. To enable it configure with `configure --rustbuild`.
2860 * [Errors for non-exhaustive `match` patterns now list up to 3 missing
2861 variants while also indicating the total number of missing variants
2862 if more than 3][1.8m].
2863 * [Executable stacks are disabled on Linux and BSD][1.8nx].
2864 * The Rust Project now publishes binary releases of the standard
2865 library for a number of tier-2 targets:
2866 `armv7-unknown-linux-gnueabihf`, `powerpc-unknown-linux-gnu`,
2867 `powerpc64-unknown-linux-gnu`, `powerpc64le-unknown-linux-gnu`
2868 `x86_64-rumprun-netbsd`. These can be installed with
2869 tools such as [multirust][1.8mr].
2874 * [`cargo init` creates a new Cargo project in the current
2875 directory][1.8ci]. It is otherwise like `cargo new`.
2876 * [Cargo has configuration keys for `-v` and
2877 `--color`][1.8cc]. `verbose` and `color`, respectively, go in the
2878 `[term]` section of `.cargo/config`.
2879 * [Configuration keys that evaluate to strings or integers can be set
2880 via environment variables][1.8ce]. For example the `build.jobs` key
2881 can be set via `CARGO_BUILD_JOBS`. Environment variables take
2882 precedence over config files.
2883 * [Target-specific dependencies support Rust `cfg` syntax for
2884 describing targets][1.8cfg] so that dependencies for multiple
2885 targets can be specified together. [RFC 1361].
2886 * [The environment variables `CARGO_TARGET_ROOT`, `RUSTC`, and
2887 `RUSTDOC` take precedence over the `build.target-dir`,
2888 `build.rustc`, and `build.rustdoc` configuration values][1.8cv].
2889 * [The child process tree is killed on Windows when Cargo is
2891 * [The `build.target` configuration value sets the target platform,
2892 like `--target`][1.8ct].
2897 * [Unstable compiler flags have been further restricted][1.8u]. Since
2898 1.0 `-Z` flags have been considered unstable, and other flags that
2899 were considered unstable additionally required passing `-Z
2900 unstable-options` to access. Unlike unstable language and library
2901 features though, these options have been accessible on the stable
2902 release channel. Going forward, *new unstable flags will not be
2903 available on the stable release channel*, and old unstable flags
2904 will warn about their usage. In the future, all unstable flags will
2905 be unavailable on the stable release channel.
2906 * [It is no longer possible to `match` on empty enum variants using
2907 the `Variant(..)` syntax][1.8v]. This has been a warning since 1.6.
2908 * The Unix-specific `MetadataExt` traits, including
2909 `os::unix::fs::MetadataExt`, which expose values such as inode
2910 numbers [no longer return platform-specific types][1.8r], but
2911 instead return widened integers. [RFC 1415].
2912 * [Modules sourced from the filesystem cannot appear within arbitrary
2913 blocks, but only within other modules][1.8mf].
2914 * [`--cfg` compiler flags are parsed strictly as identifiers][1.8c].
2915 * On Unix, [stack overflow triggers a runtime abort instead of a
2917 * [`Command::spawn` and its equivalents return an error if any of
2918 its command-line arguments contain interior `NUL`s][1.8n].
2919 * [Tuple and unit enum variants from other crates are in the type
2921 * [On Windows `rustc` emits `.lib` files for the `staticlib` library
2922 type instead of `.a` files][1.8st]. Additionally, for the MSVC
2923 toolchain, `rustc` emits import libraries named `foo.dll.lib`
2924 instead of `foo.lib`.
2927 [1.8a]: https://github.com/rust-lang/rust/pull/30962
2928 [1.8b]: https://github.com/rust-lang/rust/pull/31123
2929 [1.8c]: https://github.com/rust-lang/rust/pull/31530
2930 [1.8cc]: https://github.com/rust-lang/cargo/pull/2397
2931 [1.8ce]: https://github.com/rust-lang/cargo/pull/2398
2932 [1.8cf]: https://github.com/rust-lang/rust/pull/31278
2933 [1.8cfg]: https://github.com/rust-lang/cargo/pull/2328
2934 [1.8ci]: https://github.com/rust-lang/cargo/pull/2081
2935 [1.8ck]: https://github.com/rust-lang/cargo/pull/2370
2936 [1.8ct]: https://github.com/rust-lang/cargo/pull/2335
2937 [1.8cu]: https://github.com/rust-lang/rust/pull/31390
2938 [1.8cv]: https://github.com/rust-lang/cargo/issues/2365
2939 [1.8cv]: https://github.com/rust-lang/rust/pull/30998
2940 [1.8h]: https://github.com/rust-lang/rust/pull/31460
2941 [1.8l]: https://github.com/rust-lang/rust/pull/31668
2942 [1.8m]: https://github.com/rust-lang/rust/pull/31020
2943 [1.8mf]: https://github.com/rust-lang/rust/pull/31534
2944 [1.8mp]: https://github.com/rust-lang/rust/pull/30894
2945 [1.8mr]: https://users.rust-lang.org/t/multirust-0-8-with-cross-std-installation/4901
2946 [1.8ms]: https://github.com/rust-lang/rust/pull/30448
2947 [1.8n]: https://github.com/rust-lang/rust/pull/31056
2948 [1.8nx]: https://github.com/rust-lang/rust/pull/30859
2949 [1.8r]: https://github.com/rust-lang/rust/pull/31551
2950 [1.8so]: https://github.com/rust-lang/rust/pull/31333
2951 [1.8st]: https://github.com/rust-lang/rust/pull/29520
2952 [1.8t]: https://github.com/rust-lang/rust/pull/31358
2953 [1.8tn]: https://github.com/rust-lang/rust/pull/30882
2954 [1.8u]: https://github.com/rust-lang/rust/pull/31793
2955 [1.8v]: https://github.com/rust-lang/rust/pull/31757
2956 [1.8w]: https://github.com/rust-lang/rust/pull/31904
2957 [RFC 1361]: https://github.com/rust-lang/rfcs/blob/master/text/1361-cargo-cfg-dependencies.md
2958 [RFC 1415]: https://github.com/rust-lang/rfcs/blob/master/text/1415-trim-std-os.md
2959 [RFC 218]: https://github.com/rust-lang/rfcs/blob/master/text/0218-empty-struct-with-braces.md
2960 [RFC 953]: https://github.com/rust-lang/rfcs/blob/master/text/0953-op-assign.md
2961 [`AddAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.AddAssign.html
2962 [`BitAndAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitAndAssign.html
2963 [`BitOrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitOrAssign.html
2964 [`BitXorAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitXorAssign.html
2965 [`DivAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.DivAssign.html
2966 [`Instant::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.duration_since
2967 [`Instant::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.elapsed
2968 [`Instant::now`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.now
2969 [`MulAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.MulAssign.html
2970 [`Ref::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.Ref.html#method.map
2971 [`RefMut::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.RefMut.html#method.map
2972 [`RemAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.RemAssign.html
2973 [`ShlAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShlAssign.html
2974 [`ShrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShrAssign.html
2975 [`SubAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.SubAssign.html
2976 [`SystemTime::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.duration_since
2977 [`SystemTime::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.elapsed
2978 [`SystemTime::now`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.now
2979 [`SystemTimeError::duration`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html#method.duration
2980 [`SystemTimeError`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html
2981 [`UNIX_EPOCH`]: http://doc.rust-lang.org/nightly/std/time/constant.UNIX_EPOCH.html
2982 [`ptr::drop_in_place`]: http://doc.rust-lang.org/nightly/std/ptr/fn.drop_in_place.html
2983 [`str::EncodeUtf16`]: http://doc.rust-lang.org/nightly/std/str/struct.EncodeUtf16.html
2984 [`str::encode_utf16`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.encode_utf16
2985 [`time::Instant`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html
2986 [`time::SystemTime`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html
2989 Version 1.7.0 (2016-03-03)
2990 ==========================
2997 * [`Path::strip_prefix`][] (renamed from relative_from)
2998 * [`path::StripPrefixError`][] (new error type returned from strip_prefix)
3000 * [`Ipv4Addr::is_loopback`]
3001 * [`Ipv4Addr::is_private`]
3002 * [`Ipv4Addr::is_link_local`]
3003 * [`Ipv4Addr::is_multicast`]
3004 * [`Ipv4Addr::is_broadcast`]
3005 * [`Ipv4Addr::is_documentation`]
3007 * [`Ipv6Addr::is_unspecified`]
3008 * [`Ipv6Addr::is_loopback`]
3009 * [`Ipv6Addr::is_multicast`]
3012 * [`Vec::as_mut_slice`]
3014 * [`String::as_str`]
3015 * [`String::as_mut_str`]
3017 * `<[T]>::`[`clone_from_slice`], which now requires the two slices to
3019 * `<[T]>::`[`sort_by_key`]
3020 * checked, saturated, and overflowing operations
3021 * [`i32::checked_rem`], [`i32::checked_neg`], [`i32::checked_shl`], [`i32::checked_shr`]
3022 * [`i32::saturating_mul`]
3023 * [`i32::overflowing_add`], [`i32::overflowing_sub`], [`i32::overflowing_mul`], [`i32::overflowing_div`]
3024 * [`i32::overflowing_rem`], [`i32::overflowing_neg`], [`i32::overflowing_shl`], [`i32::overflowing_shr`]
3025 * [`u32::checked_rem`], [`u32::checked_neg`], [`u32::checked_shl`], [`u32::checked_shl`]
3026 * [`u32::saturating_mul`]
3027 * [`u32::overflowing_add`], [`u32::overflowing_sub`], [`u32::overflowing_mul`], [`u32::overflowing_div`]
3028 * [`u32::overflowing_rem`], [`u32::overflowing_neg`], [`u32::overflowing_shl`], [`u32::overflowing_shr`]
3029 * and checked, saturated, and overflowing operations for other primitive types
3031 * [`ffi::IntoStringError`]
3032 * [`CString::into_string`]
3033 * [`CString::into_bytes`]
3034 * [`CString::into_bytes_with_nul`]
3035 * `From<CString> for Vec<u8>`
3037 * [`IntoStringError::into_cstring`]
3038 * [`IntoStringError::utf8_error`]
3039 * `Error for IntoStringError`
3041 * [`std::hash::BuildHasher`]
3042 * [`BuildHasher::Hasher`]
3043 * [`BuildHasher::build_hasher`]
3044 * [`std::hash::BuildHasherDefault`]
3045 * [`HashMap::with_hasher`]
3046 * [`HashMap::with_capacity_and_hasher`]
3047 * [`HashSet::with_hasher`]
3048 * [`HashSet::with_capacity_and_hasher`]
3049 * [`std::collections::hash_map::RandomState`]
3050 * [`RandomState::new`]
3051 * [Validating UTF-8 is faster by a factor of between 7 and 14x for
3052 ASCII input][1.7utf8]. This means that creating `String`s and `str`s
3053 from bytes is faster.
3054 * [The performance of `LineWriter` (and thus `io::stdout`) was
3055 improved by using `memchr` to search for newlines][1.7m].
3056 * [`f32::to_degrees` and `f32::to_radians` are stable][1.7f]. The
3057 `f64` variants were stabilized previously.
3058 * [`BTreeMap` was rewritten to use less memory and improve the performance
3059 of insertion and iteration, the latter by as much as 5x][1.7bm].
3060 * [`BTreeSet` and its iterators, `Iter`, `IntoIter`, and `Range` are
3061 covariant over their contained type][1.7bt].
3062 * [`LinkedList` and its iterators, `Iter` and `IntoIter` are covariant
3063 over their contained type][1.7ll].
3064 * [`str::replace` now accepts a `Pattern`][1.7rp], like other string
3066 * [`Any` is implemented for unsized types][1.7a].
3067 * [`Hash` is implemented for `Duration`][1.7h].
3072 * [When running tests with `--test`, rustdoc will pass `--cfg`
3073 arguments to the compiler][1.7dt].
3074 * [The compiler is built with RPATH information by default][1.7rpa].
3075 This means that it will be possible to run `rustc` when installed in
3076 unusual configurations without configuring the dynamic linker search
3078 * [`rustc` passes `--enable-new-dtags` to GNU ld][1.7dta]. This makes
3079 any RPATH entries (emitted with `-C rpath`) *not* take precedence
3080 over `LD_LIBRARY_PATH`.
3085 * [`cargo rustc` accepts a `--profile` flag that runs `rustc` under
3086 any of the compilation profiles, 'dev', 'bench', or 'test'][1.7cp].
3087 * [The `rerun-if-changed` build script directive no longer causes the
3088 build script to incorrectly run twice in certain scenarios][1.7rr].
3093 * Soundness fixes to the interactions between associated types and
3094 lifetimes, specified in [RFC 1214], [now generate errors][1.7sf] for
3095 code that violates the new rules. This is a significant change that
3096 is known to break existing code, so it has emitted warnings for the
3097 new error cases since 1.4 to give crate authors time to adapt. The
3098 details of what is changing are subtle; read the RFC for more.
3099 * [Several bugs in the compiler's visibility calculations were
3100 fixed][1.7v]. Since this was found to break significant amounts of
3101 code, the new errors will be emitted as warnings for several release
3102 cycles, under the `private_in_public` lint.
3103 * Defaulted type parameters were accidentally accepted in positions
3104 that were not intended. In this release, [defaulted type parameters
3105 appearing outside of type definitions will generate a
3106 warning][1.7d], which will become an error in future releases.
3107 * [Parsing "." as a float results in an error instead of 0][1.7p].
3108 That is, `".".parse::<f32>()` returns `Err`, not `Ok(0.0)`.
3109 * [Borrows of closure parameters may not outlive the closure][1.7bc].
3111 [1.7a]: https://github.com/rust-lang/rust/pull/30928
3112 [1.7bc]: https://github.com/rust-lang/rust/pull/30341
3113 [1.7bm]: https://github.com/rust-lang/rust/pull/30426
3114 [1.7bt]: https://github.com/rust-lang/rust/pull/30998
3115 [1.7cp]: https://github.com/rust-lang/cargo/pull/2224
3116 [1.7d]: https://github.com/rust-lang/rust/pull/30724
3117 [1.7dt]: https://github.com/rust-lang/rust/pull/30372
3118 [1.7dta]: https://github.com/rust-lang/rust/pull/30394
3119 [1.7f]: https://github.com/rust-lang/rust/pull/30672
3120 [1.7h]: https://github.com/rust-lang/rust/pull/30818
3121 [1.7ll]: https://github.com/rust-lang/rust/pull/30663
3122 [1.7m]: https://github.com/rust-lang/rust/pull/30381
3123 [1.7p]: https://github.com/rust-lang/rust/pull/30681
3124 [1.7rp]: https://github.com/rust-lang/rust/pull/29498
3125 [1.7rpa]: https://github.com/rust-lang/rust/pull/30353
3126 [1.7rr]: https://github.com/rust-lang/cargo/pull/2279
3127 [1.7sf]: https://github.com/rust-lang/rust/pull/30389
3128 [1.7utf8]: https://github.com/rust-lang/rust/pull/30740
3129 [1.7v]: https://github.com/rust-lang/rust/pull/29973
3130 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
3131 [`BuildHasher::Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
3132 [`BuildHasher::build_hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html#tymethod.build_hasher
3133 [`CString::into_bytes_with_nul`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes_with_nul
3134 [`CString::into_bytes`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes
3135 [`CString::into_string`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_string
3136 [`HashMap::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_capacity_and_hasher
3137 [`HashMap::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_hasher
3138 [`HashSet::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_capacity_and_hasher
3139 [`HashSet::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_hasher
3140 [`IntoStringError::into_cstring`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.into_cstring
3141 [`IntoStringError::utf8_error`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.utf8_error
3142 [`Ipv4Addr::is_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_broadcast
3143 [`Ipv4Addr::is_documentation`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_documentation
3144 [`Ipv4Addr::is_link_local`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_link_local
3145 [`Ipv4Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_loopback
3146 [`Ipv4Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_multicast
3147 [`Ipv4Addr::is_private`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_private
3148 [`Ipv6Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_loopback
3149 [`Ipv6Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_multicast
3150 [`Ipv6Addr::is_unspecified`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_unspecified
3151 [`Path::strip_prefix`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.strip_prefix
3152 [`RandomState::new`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html#method.new
3153 [`String::as_mut_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_mut_str
3154 [`String::as_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_str
3155 [`Vec::as_mut_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_mut_slice
3156 [`Vec::as_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_slice
3157 [`clone_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.clone_from_slice
3158 [`ffi::IntoStringError`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html
3159 [`i32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_neg
3160 [`i32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_rem
3161 [`i32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shl
3162 [`i32::checked_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shr
3163 [`i32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_add
3164 [`i32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_div
3165 [`i32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_mul
3166 [`i32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_neg
3167 [`i32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_rem
3168 [`i32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shl
3169 [`i32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shr
3170 [`i32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_sub
3171 [`i32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.saturating_mul
3172 [`path::StripPrefixError`]: http://doc.rust-lang.org/nightly/std/path/struct.StripPrefixError.html
3173 [`sort_by_key`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.sort_by_key
3174 [`std::collections::hash_map::RandomState`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html
3175 [`std::hash::BuildHasherDefault`]: http://doc.rust-lang.org/nightly/std/hash/struct.BuildHasherDefault.html
3176 [`std::hash::BuildHasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html
3177 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
3178 [`u32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_rem
3179 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
3180 [`u32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_shl
3181 [`u32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_add
3182 [`u32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_div
3183 [`u32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_mul
3184 [`u32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_neg
3185 [`u32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_rem
3186 [`u32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shl
3187 [`u32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shr
3188 [`u32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_sub
3189 [`u32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.saturating_mul
3192 Version 1.6.0 (2016-01-21)
3193 ==========================
3198 * The `#![no_std]` attribute causes a crate to not be linked to the
3199 standard library, but only the [core library][1.6co], as described
3200 in [RFC 1184]. The core library defines common types and traits but
3201 has no platform dependencies whatsoever, and is the basis for Rust
3202 software in environments that cannot support a full port of the
3203 standard library, such as operating systems. Most of the core
3204 library is now stable.
3210 [`Read::read_exact`],
3211 [`ErrorKind::UnexpectedEof`][] (renamed from `UnexpectedEOF`),
3212 [`fs::DirBuilder`], [`fs::DirBuilder::new`],
3213 [`fs::DirBuilder::recursive`], [`fs::DirBuilder::create`],
3214 [`os::unix::fs::DirBuilderExt`],
3215 [`os::unix::fs::DirBuilderExt::mode`], [`vec::Drain`],
3216 [`vec::Vec::drain`], [`string::Drain`], [`string::String::drain`],
3217 [`vec_deque::Drain`], [`vec_deque::VecDeque::drain`],
3218 [`collections::hash_map::Drain`],
3219 [`collections::hash_map::HashMap::drain`],
3220 [`collections::hash_set::Drain`],
3221 [`collections::hash_set::HashSet::drain`],
3222 [`collections::binary_heap::Drain`],
3223 [`collections::binary_heap::BinaryHeap::drain`],
3224 [`Vec::extend_from_slice`][] (renamed from `push_all`),
3225 [`Mutex::get_mut`], [`Mutex::into_inner`], [`RwLock::get_mut`],
3226 [`RwLock::into_inner`],
3227 [`Iterator::min_by_key`][] (renamed from `min_by`),
3228 [`Iterator::max_by_key`][] (renamed from `max_by`).
3229 * The [core library][1.6co] is stable, as are most of its APIs.
3230 * [The `assert_eq!` macro supports arguments that don't implement
3231 `Sized`][1.6ae], such as arrays. In this way it behaves more like
3233 * Several timer functions that take duration in milliseconds [are
3234 deprecated in favor of those that take `Duration`][1.6ms]. These
3235 include `Condvar::wait_timeout_ms`, `thread::sleep_ms`, and
3236 `thread::park_timeout_ms`.
3237 * The algorithm by which `Vec` reserves additional elements was
3238 [tweaked to not allocate excessive space][1.6a] while still growing
3240 * `From` conversions are [implemented from integers to floats][1.6f]
3241 in cases where the conversion is lossless. Thus they are not
3242 implemented for 32-bit ints to `f32`, nor for 64-bit ints to `f32`
3243 or `f64`. They are also not implemented for `isize` and `usize`
3244 because the implementations would be platform-specific. `From` is
3245 also implemented from `f32` to `f64`.
3246 * `From<&Path>` and `From<PathBuf>` are implemented for `Cow<Path>`.
3247 * `From<T>` is implemented for `Box<T>`, `Rc<T>` and `Arc<T>`.
3248 * `IntoIterator` is implemented for `&PathBuf` and `&Path`.
3249 * [`BinaryHeap` was refactored][1.6bh] for modest performance
3251 * Sorting slices that are already sorted [is 50% faster in some
3257 * Cargo will look in `$CARGO_HOME/bin` for subcommands [by default][1.6c].
3258 * Cargo build scripts can specify their dependencies by emitting the
3259 [`rerun-if-changed`][1.6rr] key.
3260 * crates.io will reject publication of crates with dependencies that
3261 have a wildcard version constraint. Crates with wildcard
3262 dependencies were seen to cause a variety of problems, as described
3263 in [RFC 1241]. Since 1.5 publication of such crates has emitted a
3265 * `cargo clean` [accepts a `--release` flag][1.6cc] to clean the
3266 release folder. A variety of artifacts that Cargo failed to clean
3267 are now correctly deleted.
3272 * The `unreachable_code` lint [warns when a function call's argument
3274 * The parser indicates [failures that may be caused by
3275 confusingly-similar Unicode characters][1.6uc]
3276 * Certain macro errors [are reported at definition time][1.6m], not
3282 * The compiler no longer makes use of the [`RUST_PATH`][1.6rp]
3283 environment variable when locating crates. This was a pre-cargo
3284 feature for integrating with the package manager that was
3285 accidentally never removed.
3286 * [A number of bugs were fixed in the privacy checker][1.6p] that
3287 could cause previously-accepted code to break.
3288 * [Modules and unit/tuple structs may not share the same name][1.6ts].
3289 * [Bugs in pattern matching unit structs were fixed][1.6us]. The tuple
3290 struct pattern syntax (`Foo(..)`) can no longer be used to match
3291 unit structs. This is a warning now, but will become an error in
3292 future releases. Patterns that share the same name as a const are
3294 * A bug was fixed that causes [rustc not to apply default type
3295 parameters][1.6xc] when resolving certain method implementations of
3296 traits defined in other crates.
3298 [1.6a]: https://github.com/rust-lang/rust/pull/29454
3299 [1.6ae]: https://github.com/rust-lang/rust/pull/29770
3300 [1.6bh]: https://github.com/rust-lang/rust/pull/29811
3301 [1.6c]: https://github.com/rust-lang/cargo/pull/2192
3302 [1.6cc]: https://github.com/rust-lang/cargo/pull/2131
3303 [1.6co]: http://doc.rust-lang.org/beta/core/index.html
3304 [1.6dv]: https://github.com/rust-lang/rust/pull/30000
3305 [1.6f]: https://github.com/rust-lang/rust/pull/29129
3306 [1.6m]: https://github.com/rust-lang/rust/pull/29828
3307 [1.6ms]: https://github.com/rust-lang/rust/pull/29604
3308 [1.6p]: https://github.com/rust-lang/rust/pull/29726
3309 [1.6rp]: https://github.com/rust-lang/rust/pull/30034
3310 [1.6rr]: https://github.com/rust-lang/cargo/pull/2134
3311 [1.6s]: https://github.com/rust-lang/rust/pull/29675
3312 [1.6ts]: https://github.com/rust-lang/rust/issues/21546
3313 [1.6uc]: https://github.com/rust-lang/rust/pull/29837
3314 [1.6us]: https://github.com/rust-lang/rust/pull/29383
3315 [1.6xc]: https://github.com/rust-lang/rust/issues/30123
3316 [RFC 1184]: https://github.com/rust-lang/rfcs/blob/master/text/1184-stabilize-no_std.md
3317 [RFC 1241]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
3318 [`ErrorKind::UnexpectedEof`]: http://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html#variant.UnexpectedEof
3319 [`Iterator::max_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.max_by_key
3320 [`Iterator::min_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.min_by_key
3321 [`Mutex::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.get_mut
3322 [`Mutex::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.into_inner
3323 [`Read::read_exact`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_exact
3324 [`RwLock::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.get_mut
3325 [`RwLock::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.into_inner
3326 [`Vec::extend_from_slice`]: http://doc.rust-lang.org/nightly/collections/vec/struct.Vec.html#method.extend_from_slice
3327 [`collections::binary_heap::BinaryHeap::drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.BinaryHeap.html#method.drain
3328 [`collections::binary_heap::Drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.Drain.html
3329 [`collections::hash_map::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.Drain.html
3330 [`collections::hash_map::HashMap::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.HashMap.html#method.drain
3331 [`collections::hash_set::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.Drain.html
3332 [`collections::hash_set::HashSet::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.HashSet.html#method.drain
3333 [`fs::DirBuilder::create`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.create
3334 [`fs::DirBuilder::new`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.new
3335 [`fs::DirBuilder::recursive`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.recursive
3336 [`fs::DirBuilder`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html
3337 [`os::unix::fs::DirBuilderExt::mode`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html#tymethod.mode
3338 [`os::unix::fs::DirBuilderExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html
3339 [`string::Drain`]: http://doc.rust-lang.org/nightly/std/string/struct.Drain.html
3340 [`string::String::drain`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.drain
3341 [`vec::Drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Drain.html
3342 [`vec::Vec::drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.drain
3343 [`vec_deque::Drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.Drain.html
3344 [`vec_deque::VecDeque::drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.VecDeque.html#method.drain
3347 Version 1.5.0 (2015-12-10)
3348 ==========================
3350 * ~700 changes, numerous bugfixes
3356 [`BinaryHeap::from`], [`BinaryHeap::into_sorted_vec`],
3357 [`BinaryHeap::into_vec`], [`Condvar::wait_timeout`],
3358 [`FileTypeExt::is_block_device`], [`FileTypeExt::is_char_device`],
3359 [`FileTypeExt::is_fifo`], [`FileTypeExt::is_socket`],
3360 [`FileTypeExt`], [`Formatter::alternate`], [`Formatter::fill`],
3361 [`Formatter::precision`], [`Formatter::sign_aware_zero_pad`],
3362 [`Formatter::sign_minus`], [`Formatter::sign_plus`],
3363 [`Formatter::width`], [`Iterator::cmp`], [`Iterator::eq`],
3364 [`Iterator::ge`], [`Iterator::gt`], [`Iterator::le`],
3365 [`Iterator::lt`], [`Iterator::ne`], [`Iterator::partial_cmp`],
3366 [`Path::canonicalize`], [`Path::exists`], [`Path::is_dir`],
3367 [`Path::is_file`], [`Path::metadata`], [`Path::read_dir`],
3368 [`Path::read_link`], [`Path::symlink_metadata`],
3369 [`Utf8Error::valid_up_to`], [`Vec::resize`],
3370 [`VecDeque::as_mut_slices`], [`VecDeque::as_slices`],
3371 [`VecDeque::insert`], [`VecDeque::shrink_to_fit`],
3372 [`VecDeque::swap_remove_back`], [`VecDeque::swap_remove_front`],
3373 [`slice::split_first_mut`], [`slice::split_first`],
3374 [`slice::split_last_mut`], [`slice::split_last`],
3375 [`char::from_u32_unchecked`], [`fs::canonicalize`],
3376 [`str::MatchIndices`], [`str::RMatchIndices`],
3377 [`str::match_indices`], [`str::rmatch_indices`],
3378 [`str::slice_mut_unchecked`], [`string::ParseError`].
3379 * Rust applications hosted on crates.io can be installed locally to
3380 `~/.cargo/bin` with the [`cargo install`] command. Among other
3381 things this makes it easier to augment Cargo with new subcommands:
3382 when a binary named e.g. `cargo-foo` is found in `$PATH` it can be
3383 invoked as `cargo foo`.
3384 * Crates with wildcard (`*`) dependencies will [emit warnings when
3385 published][1.5w]. In 1.6 it will no longer be possible to publish
3386 crates with wildcard dependencies.
3391 * The rules determining when a particular lifetime must outlive
3392 a particular value (known as '[dropck]') have been [modified
3393 to not rely on parametricity][1.5p].
3394 * [Implementations of `AsRef` and `AsMut` were added to `Box`, `Rc`,
3395 and `Arc`][1.5a]. Because these smart pointer types implement
3396 `Deref`, this causes breakage in cases where the interior type
3397 contains methods of the same name.
3398 * [Correct a bug in Rc/Arc][1.5c] that caused [dropck] to be unaware
3399 that they could drop their content. Soundness fix.
3400 * All method invocations are [properly checked][1.5wf1] for
3401 [well-formedness][1.5wf2]. Soundness fix.
3402 * Traits whose supertraits contain `Self` are [not object
3403 safe][1.5o]. Soundness fix.
3404 * Target specifications support a [`no_default_libraries`][1.5nd]
3405 setting that controls whether `-nodefaultlibs` is passed to the
3406 linker, and in turn the `is_like_windows` setting no longer affects
3407 the `-nodefaultlibs` flag.
3408 * `#[derive(Show)]`, long-deprecated, [has been removed][1.5ds].
3409 * The `#[inline]` and `#[repr]` attributes [can only appear
3410 in valid locations][1.5at].
3411 * Native libraries linked from the local crate are [passed to
3412 the linker before native libraries from upstream crates][1.5nl].
3413 * Two rarely-used attributes, `#[no_debug]` and
3414 `#[omit_gdb_pretty_printer_section]` [are feature gated][1.5fg].
3415 * Negation of unsigned integers, which has been a warning for
3416 several releases, [is now behind a feature gate and will
3417 generate errors][1.5nu].
3418 * The parser accidentally accepted visibility modifiers on
3419 enum variants, a bug [which has been fixed][1.5ev].
3420 * [A bug was fixed that allowed `use` statements to import unstable
3426 * When evaluating expressions at compile-time that are not
3427 compile-time constants (const-evaluating expressions in non-const
3428 contexts), incorrect code such as overlong bitshifts and arithmetic
3429 overflow will [generate a warning instead of an error][1.5ce],
3430 delaying the error until runtime. This will allow the
3431 const-evaluator to be expanded in the future backwards-compatibly.
3432 * The `improper_ctypes` lint [no longer warns about using `isize` and
3433 `usize` in FFI][1.5ict].
3438 * `Arc<T>` and `Rc<T>` are [covariant with respect to `T` instead of
3440 * `Default` is [implemented for mutable slices][1.5d].
3441 * `FromStr` is [implemented for `SockAddrV4` and `SockAddrV6`][1.5s].
3442 * There are now `From` conversions [between floating point
3443 types][1.5f] where the conversions are lossless.
3444 * There are now `From` conversions [between integer types][1.5i] where
3445 the conversions are lossless.
3446 * [`fs::Metadata` implements `Clone`][1.5fs].
3447 * The `parse` method [accepts a leading "+" when parsing
3449 * [`AsMut` is implemented for `Vec`][1.5am].
3450 * The `clone_from` implementations for `String` and `BinaryHeap` [have
3451 been optimized][1.5cf] and no longer rely on the default impl.
3452 * The `extern "Rust"`, `extern "C"`, `unsafe extern "Rust"` and
3453 `unsafe extern "C"` function types now [implement `Clone`,
3454 `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and
3455 `fmt::Debug` for up to 12 arguments][1.5fp].
3456 * [Dropping `Vec`s is much faster in unoptimized builds when the
3457 element types don't implement `Drop`][1.5dv].
3458 * A bug that caused in incorrect behavior when [combining `VecDeque`
3459 with zero-sized types][1.5vdz] was resolved.
3460 * [`PartialOrd` for slices is faster][1.5po].
3465 * [Crate metadata size was reduced by 20%][1.5md].
3466 * [Improvements to code generation reduced the size of libcore by 3.3
3467 MB and rustc's memory usage by 18MB][1.5m].
3468 * [Improvements to deref translation increased performance in
3469 unoptimized builds][1.5dr].
3470 * Various errors in trait resolution [are deduplicated to only be
3471 reported once][1.5te].
3472 * Rust has preliminary [support for rumprun kernels][1.5rr].
3473 * Rust has preliminary [support for NetBSD on amd64][1.5na].
3475 [1.5use]: https://github.com/rust-lang/rust/pull/28364
3476 [1.5po]: https://github.com/rust-lang/rust/pull/28436
3477 [1.5ev]: https://github.com/rust-lang/rust/pull/28442
3478 [1.5nu]: https://github.com/rust-lang/rust/pull/28468
3479 [1.5dr]: https://github.com/rust-lang/rust/pull/28491
3480 [1.5vdz]: https://github.com/rust-lang/rust/pull/28494
3481 [1.5md]: https://github.com/rust-lang/rust/pull/28521
3482 [1.5fg]: https://github.com/rust-lang/rust/pull/28522
3483 [1.5dv]: https://github.com/rust-lang/rust/pull/28531
3484 [1.5na]: https://github.com/rust-lang/rust/pull/28543
3485 [1.5fp]: https://github.com/rust-lang/rust/pull/28560
3486 [1.5rr]: https://github.com/rust-lang/rust/pull/28593
3487 [1.5cf]: https://github.com/rust-lang/rust/pull/28602
3488 [1.5nl]: https://github.com/rust-lang/rust/pull/28605
3489 [1.5te]: https://github.com/rust-lang/rust/pull/28645
3490 [1.5at]: https://github.com/rust-lang/rust/pull/28650
3491 [1.5am]: https://github.com/rust-lang/rust/pull/28663
3492 [1.5m]: https://github.com/rust-lang/rust/pull/28778
3493 [1.5ict]: https://github.com/rust-lang/rust/pull/28779
3494 [1.5a]: https://github.com/rust-lang/rust/pull/28811
3495 [1.5pi]: https://github.com/rust-lang/rust/pull/28826
3496 [1.5ce]: https://github.com/rust-lang/rfcs/blob/master/text/1229-compile-time-asserts.md
3497 [1.5p]: https://github.com/rust-lang/rfcs/blob/master/text/1238-nonparametric-dropck.md
3498 [1.5i]: https://github.com/rust-lang/rust/pull/28921
3499 [1.5fs]: https://github.com/rust-lang/rust/pull/29021
3500 [1.5f]: https://github.com/rust-lang/rust/pull/29129
3501 [1.5ds]: https://github.com/rust-lang/rust/pull/29148
3502 [1.5s]: https://github.com/rust-lang/rust/pull/29190
3503 [1.5d]: https://github.com/rust-lang/rust/pull/29245
3504 [1.5o]: https://github.com/rust-lang/rust/pull/29259
3505 [1.5nd]: https://github.com/rust-lang/rust/pull/28578
3506 [1.5wf2]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
3507 [1.5wf1]: https://github.com/rust-lang/rust/pull/28669
3508 [dropck]: https://doc.rust-lang.org/nightly/nomicon/dropck.html
3509 [1.5c]: https://github.com/rust-lang/rust/pull/29110
3510 [1.5w]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
3511 [`cargo install`]: https://github.com/rust-lang/rfcs/blob/master/text/1200-cargo-install.md
3512 [`BinaryHeap::from`]: http://doc.rust-lang.org/nightly/std/convert/trait.From.html#method.from
3513 [`BinaryHeap::into_sorted_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_sorted_vec
3514 [`BinaryHeap::into_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_vec
3515 [`Condvar::wait_timeout`]: http://doc.rust-lang.org/nightly/std/sync/struct.Condvar.html#method.wait_timeout
3516 [`FileTypeExt::is_block_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_block_device
3517 [`FileTypeExt::is_char_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_char_device
3518 [`FileTypeExt::is_fifo`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_fifo
3519 [`FileTypeExt::is_socket`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_socket
3520 [`FileTypeExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html
3521 [`Formatter::alternate`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.alternate
3522 [`Formatter::fill`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.fill
3523 [`Formatter::precision`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.precision
3524 [`Formatter::sign_aware_zero_pad`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_aware_zero_pad
3525 [`Formatter::sign_minus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_minus
3526 [`Formatter::sign_plus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_plus
3527 [`Formatter::width`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.width
3528 [`Iterator::cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.cmp
3529 [`Iterator::eq`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.eq
3530 [`Iterator::ge`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ge
3531 [`Iterator::gt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.gt
3532 [`Iterator::le`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.le
3533 [`Iterator::lt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.lt
3534 [`Iterator::ne`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ne
3535 [`Iterator::partial_cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.partial_cmp
3536 [`Path::canonicalize`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.canonicalize
3537 [`Path::exists`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.exists
3538 [`Path::is_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_dir
3539 [`Path::is_file`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_file
3540 [`Path::metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.metadata
3541 [`Path::read_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_dir
3542 [`Path::read_link`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_link
3543 [`Path::symlink_metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.symlink_metadata
3544 [`Utf8Error::valid_up_to`]: http://doc.rust-lang.org/nightly/core/str/struct.Utf8Error.html#method.valid_up_to
3545 [`Vec::resize`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.resize
3546 [`VecDeque::as_mut_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_mut_slices
3547 [`VecDeque::as_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_slices
3548 [`VecDeque::insert`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.insert
3549 [`VecDeque::shrink_to_fit`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.shrink_to_fit
3550 [`VecDeque::swap_remove_back`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_back
3551 [`VecDeque::swap_remove_front`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_front
3552 [`slice::split_first_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first_mut
3553 [`slice::split_first`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first
3554 [`slice::split_last_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last_mut
3555 [`slice::split_last`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last
3556 [`char::from_u32_unchecked`]: http://doc.rust-lang.org/nightly/std/char/fn.from_u32_unchecked.html
3557 [`fs::canonicalize`]: http://doc.rust-lang.org/nightly/std/fs/fn.canonicalize.html
3558 [`str::MatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.MatchIndices.html
3559 [`str::RMatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.RMatchIndices.html
3560 [`str::match_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.match_indices
3561 [`str::rmatch_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatch_indices
3562 [`str::slice_mut_unchecked`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.slice_mut_unchecked
3563 [`string::ParseError`]: http://doc.rust-lang.org/nightly/std/string/enum.ParseError.html
3565 Version 1.4.0 (2015-10-29)
3566 ==========================
3568 * ~1200 changes, numerous bugfixes
3573 * Windows builds targeting the 64-bit MSVC ABI and linker (instead of
3574 GNU) are now supported and recommended for use.
3579 * [Several changes have been made to fix type soundness and improve
3580 the behavior of associated types][sound]. See [RFC 1214]. Although
3581 we have mostly introduced these changes as warnings this release, to
3582 become errors next release, there are still some scenarios that will
3583 see immediate breakage.
3584 * [The `str::lines` and `BufRead::lines` iterators treat `\r\n` as
3585 line breaks in addition to `\n`][crlf].
3586 * [Loans of `'static` lifetime extend to the end of a function][stat].
3587 * [`str::parse` no longer introduces avoidable rounding error when
3588 parsing floating point numbers. Together with earlier changes to
3589 float formatting/output, "round trips" like f.to_string().parse()
3590 now preserve the value of f exactly. Additionally, leading plus
3591 signs are now accepted][fp3].
3597 * `use` statements that import multiple items [can now rename
3598 them][i], as in `use foo::{bar as kitten, baz as puppy}`.
3599 * [Binops work correctly on fat pointers][binfat].
3600 * `pub extern crate`, which does not behave as expected, [issues a
3601 warning][pec] until a better solution is found.
3606 * [Many APIs were stabilized][stab]: `<Box<str>>::into_string`,
3607 [`Arc::downgrade`], [`Arc::get_mut`], [`Arc::make_mut`],
3608 [`Arc::try_unwrap`], [`Box::from_raw`], [`Box::into_raw`], [`CStr::to_str`],
3609 [`CStr::to_string_lossy`], [`CString::from_raw`], [`CString::into_raw`],
3610 [`IntoRawFd::into_raw_fd`], [`IntoRawFd`],
3611 `IntoRawHandle::into_raw_handle`, `IntoRawHandle`,
3612 `IntoRawSocket::into_raw_socket`, `IntoRawSocket`, [`Rc::downgrade`],
3613 [`Rc::get_mut`], [`Rc::make_mut`], [`Rc::try_unwrap`], [`Result::expect`],
3614 [`String::into_boxed_str`], [`TcpStream::read_timeout`],
3615 [`TcpStream::set_read_timeout`], [`TcpStream::set_write_timeout`],
3616 [`TcpStream::write_timeout`], [`UdpSocket::read_timeout`],
3617 [`UdpSocket::set_read_timeout`], [`UdpSocket::set_write_timeout`],
3618 [`UdpSocket::write_timeout`], `Vec::append`, `Vec::split_off`,
3619 [`VecDeque::append`], [`VecDeque::retain`], [`VecDeque::split_off`],
3620 [`rc::Weak::upgrade`], [`rc::Weak`], [`slice::Iter::as_slice`],
3621 [`slice::IterMut::into_slice`], [`str::CharIndices::as_str`],
3622 [`str::Chars::as_str`], [`str::split_at_mut`], [`str::split_at`],
3623 [`sync::Weak::upgrade`], [`sync::Weak`], [`thread::park_timeout`],
3625 * [Some APIs were deprecated][dep]: `BTreeMap::with_b`,
3626 `BTreeSet::with_b`, `Option::as_mut_slice`, `Option::as_slice`,
3627 `Result::as_mut_slice`, `Result::as_slice`, `f32::from_str_radix`,
3628 `f64::from_str_radix`.
3629 * [Reverse-searching strings is faster with the 'two-way'
3631 * [`std::io::copy` allows `?Sized` arguments][cc].
3632 * The `Windows`, `Chunks`, and `ChunksMut` iterators over slices all
3633 [override `count`, `nth` and `last` with an O(1)
3634 implementation][it].
3635 * [`Default` is implemented for arrays up to `[T; 32]`][d].
3636 * [`IntoRawFd` has been added to the Unix-specific prelude,
3637 `IntoRawSocket` and `IntoRawHandle` to the Windows-specific
3639 * [`Extend<String>` and `FromIterator<String` are both implemented for
3641 * [`IntoIterator` is implemented for references to `Option` and
3643 * [`HashMap` and `HashSet` implement `Extend<&T>` where `T:
3644 Copy`][ext] as part of [RFC 839]. This will cause type inference
3645 breakage in rare situations.
3646 * [`BinaryHeap` implements `Debug`][bh2].
3647 * [`Borrow` and `BorrowMut` are implemented for fixed-size
3649 * [`extern fn`s with the "Rust" and "C" ABIs implement common
3650 traits including `Eq`, `Ord`, `Debug`, `Hash`][fp].
3651 * [String comparison is faster][faststr].
3652 * `&mut T` where `T: std::fmt::Write` [also implements
3653 `std::fmt::Write`][mutw].
3654 * [A stable regression in `VecDeque::push_back` and other
3655 capacity-altering methods that caused panics for zero-sized types
3657 * [Function pointers implement traits for up to 12 parameters][fp2].
3662 * The compiler [no longer uses the 'morestack' feature to prevent
3663 stack overflow][mm]. Instead it uses guard pages and stack
3664 probes (though stack probes are not yet implemented on any platform
3666 * [The compiler matches traits faster when projections are involved][p].
3667 * The 'improper_ctypes' lint [no longer warns about use of `isize` and
3669 * [Cargo now displays useful information about what its doing during
3670 `cargo update`][cu].
3672 [`Arc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.downgrade
3673 [`Arc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.make_mut
3674 [`Arc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.get_mut
3675 [`Arc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.try_unwrap
3676 [`Box::from_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.from_raw
3677 [`Box::into_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.into_raw
3678 [`CStr::to_str`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_str
3679 [`CStr::to_string_lossy`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_string_lossy
3680 [`CString::from_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.from_raw
3681 [`CString::into_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_raw
3682 [`IntoRawFd::into_raw_fd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html#tymethod.into_raw_fd
3683 [`IntoRawFd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html
3684 [`Rc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.downgrade
3685 [`Rc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.get_mut
3686 [`Rc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.make_mut
3687 [`Rc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.try_unwrap
3688 [`Result::expect`]: http://doc.rust-lang.org/nightly/core/result/enum.Result.html#method.expect
3689 [`String::into_boxed_str`]: http://doc.rust-lang.org/nightly/collections/string/struct.String.html#method.into_boxed_str
3690 [`TcpStream::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
3691 [`TcpStream::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
3692 [`TcpStream::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
3693 [`TcpStream::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
3694 [`UdpSocket::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
3695 [`UdpSocket::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
3696 [`UdpSocket::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
3697 [`UdpSocket::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
3698 [`VecDeque::append`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.append
3699 [`VecDeque::retain`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.retain
3700 [`VecDeque::split_off`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.split_off
3701 [`rc::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html#method.upgrade
3702 [`rc::Weak`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html
3703 [`slice::Iter::as_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.Iter.html#method.as_slice
3704 [`slice::IterMut::into_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.IterMut.html#method.into_slice
3705 [`str::CharIndices::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.CharIndices.html#method.as_str
3706 [`str::Chars::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.Chars.html#method.as_str
3707 [`str::split_at_mut`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at_mut
3708 [`str::split_at`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at
3709 [`sync::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html#method.upgrade
3710 [`sync::Weak`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html
3711 [`thread::park_timeout`]: http://doc.rust-lang.org/nightly/std/thread/fn.park_timeout.html
3712 [`thread::sleep`]: http://doc.rust-lang.org/nightly/std/thread/fn.sleep.html
3713 [bh2]: https://github.com/rust-lang/rust/pull/28156
3714 [binfat]: https://github.com/rust-lang/rust/pull/28270
3715 [bm]: https://github.com/rust-lang/rust/pull/28197
3716 [cc]: https://github.com/rust-lang/rust/pull/27531
3717 [crlf]: https://github.com/rust-lang/rust/pull/28034
3718 [cu]: https://github.com/rust-lang/cargo/pull/1931
3719 [d]: https://github.com/rust-lang/rust/pull/27825
3720 [dep]: https://github.com/rust-lang/rust/pull/28339
3721 [es]: https://github.com/rust-lang/rust/pull/27956
3722 [ext]: https://github.com/rust-lang/rust/pull/28094
3723 [faststr]: https://github.com/rust-lang/rust/pull/28338
3724 [ffi]: https://github.com/rust-lang/rust/pull/28779
3725 [fp]: https://github.com/rust-lang/rust/pull/28268
3726 [fp2]: https://github.com/rust-lang/rust/pull/28560
3727 [fp3]: https://github.com/rust-lang/rust/pull/27307
3728 [i]: https://github.com/rust-lang/rust/pull/27451
3729 [into2]: https://github.com/rust-lang/rust/pull/28039
3730 [it]: https://github.com/rust-lang/rust/pull/27652
3731 [mm]: https://github.com/rust-lang/rust/pull/27338
3732 [mutw]: https://github.com/rust-lang/rust/pull/28368
3733 [sound]: https://github.com/rust-lang/rust/pull/27641
3734 [p]: https://github.com/rust-lang/rust/pull/27866
3735 [pec]: https://github.com/rust-lang/rust/pull/28486
3736 [pr]: https://github.com/rust-lang/rust/pull/27896
3737 [RFC 839]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
3738 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
3739 [s]: https://github.com/rust-lang/rust/pull/27474
3740 [stab]: https://github.com/rust-lang/rust/pull/28339
3741 [stat]: https://github.com/rust-lang/rust/pull/28321
3742 [vd]: https://github.com/rust-lang/rust/pull/28494
3744 Version 1.3.0 (2015-09-17)
3745 ==============================
3747 * ~900 changes, numerous bugfixes
3752 * The [new object lifetime defaults][nold] have been [turned
3753 on][nold2] after a cycle of warnings about the change. Now types
3754 like `&'a Box<Trait>` (or `&'a Rc<Trait>`, etc) will change from
3755 being interpreted as `&'a Box<Trait+'a>` to `&'a
3756 Box<Trait+'static>`.
3757 * [The Rustonomicon][nom] is a new book in the official documentation
3758 that dives into writing unsafe Rust.
3759 * The [`Duration`] API, [has been stabilized][ds]. This basic unit of
3760 timekeeping is employed by other std APIs, as well as out-of-tree
3766 * The [new object lifetime defaults][nold] have been [turned
3767 on][nold2] after a cycle of warnings about the change.
3768 * There is a known [regression][lr] in how object lifetime elision is
3769 interpreted, the proper solution for which is undetermined.
3770 * The `#[prelude_import]` attribute, an internal implementation
3771 detail, was accidentally stabilized previously. [It has been put
3772 behind the `prelude_import` feature gate][pi]. This change is
3773 believed to break no existing code.
3774 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
3775 [more sane for dynamically sized types][dst3]. Code that relied on
3776 the previous behavior is thought to be broken.
3777 * The `dropck` rules, which checks that destructors can't access
3778 destroyed values, [have been updated][dropck] to match the
3779 [RFC][dropckrfc]. This fixes some soundness holes, and as such will
3780 cause some previously-compiling code to no longer build.
3785 * The [new object lifetime defaults][nold] have been [turned
3786 on][nold2] after a cycle of warnings about the change.
3787 * Semicolons may [now follow types and paths in
3788 macros](https://github.com/rust-lang/rust/pull/27000).
3789 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
3790 [more sane for dynamically sized types][dst3]. Code that relied on
3791 the previous behavior is not known to exist, and suspected to be
3793 * `'static` variables [may now be recursive][st].
3794 * `ref` bindings choose between [`Deref`] and [`DerefMut`]
3795 implementations correctly.
3796 * The `dropck` rules, which checks that destructors can't access
3797 destroyed values, [have been updated][dropck] to match the
3803 * The [`Duration`] API, [has been stabilized][ds], as well as the
3804 `std::time` module, which presently contains only `Duration`.
3805 * `Box<str>` and `Box<[T]>` both implement `Clone`.
3806 * The owned C string, [`CString`], implements [`Borrow`] and the
3807 borrowed C string, [`CStr`], implements [`ToOwned`]. The two of
3808 these allow C strings to be borrowed and cloned in generic code.
3809 * [`CStr`] implements [`Debug`].
3810 * [`AtomicPtr`] implements [`Debug`].
3811 * [`Error`] trait objects [can be downcast to their concrete types][e]
3812 in many common configurations, using the [`is`], [`downcast`],
3813 [`downcast_ref`] and [`downcast_mut`] methods, similarly to the
3815 * Searching for substrings now [employs the two-way algorithm][search]
3816 instead of doing a naive search. This gives major speedups to a
3817 number of methods, including [`contains`][sc], [`find`][sf],
3818 [`rfind`][srf], [`split`][ss]. [`starts_with`][ssw] and
3819 [`ends_with`][sew] are also faster.
3820 * The performance of `PartialEq` for slices is [much faster][ps].
3821 * The [`Hash`] trait offers the default method, [`hash_slice`], which
3822 is overridden and optimized by the implementations for scalars.
3823 * The [`Hasher`] trait now has a number of specialized `write_*`
3824 methods for primitive types, for efficiency.
3825 * The I/O-specific error type, [`std::io::Error`][ie], gained a set of
3826 methods for accessing the 'inner error', if any: [`get_ref`][iegr],
3827 [`get_mut`][iegm], [`into_inner`][ieii]. As well, the implementation
3828 of [`std::error::Error::cause`][iec] also delegates to the inner
3830 * [`process::Child`][pc] gained the [`id`] method, which returns a
3831 `u32` representing the platform-specific process identifier.
3832 * The [`connect`] method on slices is deprecated, replaced by the new
3833 [`join`] method (note that both of these are on the *unstable*
3834 [`SliceConcatExt`] trait, but through the magic of the prelude are
3835 available to stable code anyway).
3836 * The [`Div`] operator is implemented for [`Wrapping`] types.
3837 * [`DerefMut` is implemented for `String`][dms].
3838 * Performance of SipHash (the default hasher for `HashMap`) is
3839 [better for long data][sh].
3840 * [`AtomicPtr`] implements [`Send`].
3841 * The [`read_to_end`] implementations for [`Stdin`] and [`File`]
3842 are now [specialized to use uninitialized buffers for increased
3844 * Lifetime parameters of foreign functions [are now resolved
3850 * Rust can now, with some coercion, [produce programs that run on
3851 Windows XP][xp], though XP is not considered a supported platform.
3852 * Porting Rust on Windows from the GNU toolchain to MSVC continues
3853 ([1][win1], [2][win2], [3][win3], [4][win4]). It is still not
3854 recommended for use in 1.3, though should be fully-functional
3855 in the [64-bit 1.4 beta][b14].
3856 * On Fedora-based systems installation will [properly configure the
3857 dynamic linker][fl].
3858 * The compiler gained many new extended error descriptions, which can
3859 be accessed with the `--explain` flag.
3860 * The `dropck` pass, which checks that destructors can't access
3861 destroyed values, [has been rewritten][dropck]. This fixes some
3862 soundness holes, and as such will cause some previously-compiling
3863 code to no longer build.
3864 * `rustc` now uses [LLVM to write archive files where possible][ar].
3865 Eventually this will eliminate the compiler's dependency on the ar
3867 * Rust has [preliminary support for i686 FreeBSD][fb] (it has long
3868 supported FreeBSD on x86_64).
3869 * The [`unused_mut`][lum], [`unconditional_recursion`][lur],
3870 [`improper_ctypes`][lic], and [`negate_unsigned`][lnu] lints are
3872 * If landing pads are disabled (with `-Z no-landing-pads`), [`panic!`
3873 will kill the process instead of leaking][nlp].
3875 [`Any`]: http://doc.rust-lang.org/nightly/std/any/trait.Any.html
3876 [`AtomicPtr`]: http://doc.rust-lang.org/nightly/std/sync/atomic/struct.AtomicPtr.html
3877 [`Borrow`]: http://doc.rust-lang.org/nightly/std/borrow/trait.Borrow.html
3878 [`CStr`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html
3879 [`CString`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html
3880 [`Debug`]: http://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
3881 [`DerefMut`]: http://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
3882 [`Deref`]: http://doc.rust-lang.org/nightly/std/ops/trait.Deref.html
3883 [`Div`]: http://doc.rust-lang.org/nightly/std/ops/trait.Div.html
3884 [`Duration`]: http://doc.rust-lang.org/nightly/std/time/struct.Duration.html
3885 [`Error`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html
3886 [`File`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html
3887 [`Hash`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html
3888 [`Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
3889 [`Send`]: http://doc.rust-lang.org/nightly/std/marker/trait.Send.html
3890 [`SliceConcatExt`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html
3891 [`Stdin`]: http://doc.rust-lang.org/nightly/std/io/struct.Stdin.html
3892 [`ToOwned`]: http://doc.rust-lang.org/nightly/std/borrow/trait.ToOwned.html
3893 [`Wrapping`]: http://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
3894 [`connect`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.connect
3895 [`downcast_mut`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_mut
3896 [`downcast_ref`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_ref
3897 [`downcast`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast
3898 [`hash_slice`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
3899 [`id`]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html#method.id
3900 [`is`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.is
3901 [`join`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.join
3902 [`read_to_end`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_to_end
3903 [ar]: https://github.com/rust-lang/rust/pull/26926
3904 [b14]: https://static.rust-lang.org/dist/rust-beta-x86_64-pc-windows-msvc.msi
3905 [dms]: https://github.com/rust-lang/rust/pull/26241
3906 [dropck]: https://github.com/rust-lang/rust/pull/27261
3907 [dropckrfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
3908 [ds]: https://github.com/rust-lang/rust/pull/26818
3909 [dst1]: http://doc.rust-lang.org/nightly/std/mem/fn.size_of_val.html
3910 [dst2]: http://doc.rust-lang.org/nightly/std/mem/fn.align_of_val.html
3911 [dst3]: https://github.com/rust-lang/rust/pull/27351
3912 [e]: https://github.com/rust-lang/rust/pull/24793
3913 [f]: https://github.com/rust-lang/rust/pull/26588
3914 [fb]: https://github.com/rust-lang/rust/pull/26959
3915 [fl]: https://github.com/rust-lang/rust-installer/pull/41
3916 [hs]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
3917 [ie]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html
3918 [iec]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.cause
3919 [iegm]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_mut
3920 [iegr]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_ref
3921 [ieii]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.into_inner
3922 [lic]: https://github.com/rust-lang/rust/pull/26583
3923 [lnu]: https://github.com/rust-lang/rust/pull/27026
3924 [lr]: https://github.com/rust-lang/rust/issues/27248
3925 [lum]: https://github.com/rust-lang/rust/pull/26378
3926 [lur]: https://github.com/rust-lang/rust/pull/26783
3927 [nlp]: https://github.com/rust-lang/rust/pull/27176
3928 [nold2]: https://github.com/rust-lang/rust/pull/27045
3929 [nold]: https://github.com/rust-lang/rfcs/blob/master/text/1156-adjust-default-object-bounds.md
3930 [nom]: http://doc.rust-lang.org/nightly/nomicon/
3931 [pc]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html
3932 [pi]: https://github.com/rust-lang/rust/pull/26699
3933 [ps]: https://github.com/rust-lang/rust/pull/26884
3934 [rte]: https://github.com/rust-lang/rust/pull/26950
3935 [sc]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.contains
3936 [search]: https://github.com/rust-lang/rust/pull/26327
3937 [sew]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.ends_with
3938 [sf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.find
3939 [sh]: https://github.com/rust-lang/rust/pull/27280
3940 [srf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rfind
3941 [ss]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split
3942 [ssw]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.starts_with
3943 [st]: https://github.com/rust-lang/rust/pull/26630
3944 [win1]: https://github.com/rust-lang/rust/pull/26569
3945 [win2]: https://github.com/rust-lang/rust/pull/26741
3946 [win3]: https://github.com/rust-lang/rust/pull/26741
3947 [win4]: https://github.com/rust-lang/rust/pull/27210
3948 [xp]: https://github.com/rust-lang/rust/pull/26569
3950 Version 1.2.0 (2015-08-07)
3951 ==========================
3953 * ~1200 changes, numerous bugfixes
3958 * [Dynamically-sized-type coercions][dst] allow smart pointer types
3959 like `Rc` to contain types without a fixed size, arrays and trait
3960 objects, finally enabling use of `Rc<[T]>` and completing the
3961 implementation of DST.
3962 * [Parallel codegen][parcodegen] is now working again, which can
3963 substantially speed up large builds in debug mode; It also gets
3964 another ~33% speedup when bootstrapping on a 4 core machine (using 8
3965 jobs). It's not enabled by default, but will be "in the near
3966 future". It can be activated with the `-C codegen-units=N` flag to
3968 * This is the first release with [experimental support for linking
3969 with the MSVC linker and lib C on Windows (instead of using the GNU
3970 variants via MinGW)][win]. It is yet recommended only for the most
3971 intrepid Rustaceans.
3972 * Benchmark compilations are showing a 30% improvement in
3973 bootstrapping over 1.1.
3978 * The [`to_uppercase`] and [`to_lowercase`] methods on `char` now do
3979 unicode case mapping, which is a previously-planned change in
3980 behavior and considered a bugfix.
3981 * [`mem::align_of`] now specifies [the *minimum alignment* for
3982 T][align], which is usually the alignment programs are interested
3983 in, and the same value reported by clang's
3984 `alignof`. [`mem::min_align_of`] is deprecated. This is not known to
3986 * [The `#[packed]` attribute is no longer silently accepted by the
3987 compiler][packed]. This attribute did nothing and code that
3988 mentioned it likely did not work as intended.
3989 * Associated type defaults are [now behind the
3990 `associated_type_defaults` feature gate][ad]. In 1.1 associated type
3991 defaults *did not work*, but could be mentioned syntactically. As
3992 such this breakage has minimal impact.
3997 * Patterns with `ref mut` now correctly invoke [`DerefMut`] when
3998 matching against dereferencable values.
4003 * The [`Extend`] trait, which grows a collection from an iterator, is
4004 implemented over iterators of references, for `String`, `Vec`,
4005 `LinkedList`, `VecDeque`, `EnumSet`, `BinaryHeap`, `VecMap`,
4006 `BTreeSet` and `BTreeMap`. [RFC][extend-rfc].
4007 * The [`iter::once`] function returns an iterator that yields a single
4008 element, and [`iter::empty`] returns an iterator that yields no
4010 * The [`matches`] and [`rmatches`] methods on `str` return iterators
4011 over substring matches.
4012 * [`Cell`] and [`RefCell`] both implement `Eq`.
4013 * A number of methods for wrapping arithmetic are added to the
4014 integral types, [`wrapping_div`], [`wrapping_rem`],
4015 [`wrapping_neg`], [`wrapping_shl`], [`wrapping_shr`]. These are in
4016 addition to the existing [`wrapping_add`], [`wrapping_sub`], and
4017 [`wrapping_mul`] methods, and alternatives to the [`Wrapping`]
4018 type.. It is illegal for the default arithmetic operations in Rust
4019 to overflow; the desire to wrap must be explicit.
4020 * The `{:#?}` formatting specifier [displays the alternate,
4021 pretty-printed][debugfmt] form of the `Debug` formatter. This
4022 feature was actually introduced prior to 1.0 with little
4024 * [`fmt::Formatter`] implements [`fmt::Write`], a `fmt`-specific trait
4025 for writing data to formatted strings, similar to [`io::Write`].
4026 * [`fmt::Formatter`] adds 'debug builder' methods, [`debug_struct`],
4027 [`debug_tuple`], [`debug_list`], [`debug_set`], [`debug_map`]. These
4028 are used by code generators to emit implementations of [`Debug`].
4029 * `str` has new [`to_uppercase`][strup] and [`to_lowercase`][strlow]
4030 methods that convert case, following Unicode case mapping.
4031 * It is now easier to handle poisoned locks. The [`PoisonError`]
4032 type, returned by failing lock operations, exposes `into_inner`,
4033 `get_ref`, and `get_mut`, which all give access to the inner lock
4034 guard, and allow the poisoned lock to continue to operate. The
4035 `is_poisoned` method of [`RwLock`] and [`Mutex`] can poll for a
4036 poisoned lock without attempting to take the lock.
4037 * On Unix the [`FromRawFd`] trait is implemented for [`Stdio`], and
4038 [`AsRawFd`] for [`ChildStdin`], [`ChildStdout`], [`ChildStderr`].
4039 On Windows the `FromRawHandle` trait is implemented for `Stdio`,
4040 and `AsRawHandle` for `ChildStdin`, `ChildStdout`,
4042 * [`io::ErrorKind`] has a new variant, `InvalidData`, which indicates
4048 * `rustc` employs smarter heuristics for guessing at [typos].
4049 * `rustc` emits more efficient code for [no-op conversions between
4050 unsafe pointers][nop].
4051 * Fat pointers are now [passed in pairs of immediate arguments][fat],
4052 resulting in faster compile times and smaller code.
4054 [`Extend`]: https://doc.rust-lang.org/nightly/std/iter/trait.Extend.html
4055 [extend-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
4056 [`iter::once`]: https://doc.rust-lang.org/nightly/std/iter/fn.once.html
4057 [`iter::empty`]: https://doc.rust-lang.org/nightly/std/iter/fn.empty.html
4058 [`matches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.matches
4059 [`rmatches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatches
4060 [`Cell`]: https://doc.rust-lang.org/nightly/std/cell/struct.Cell.html
4061 [`RefCell`]: https://doc.rust-lang.org/nightly/std/cell/struct.RefCell.html
4062 [`wrapping_add`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_add
4063 [`wrapping_sub`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_sub
4064 [`wrapping_mul`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_mul
4065 [`wrapping_div`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_div
4066 [`wrapping_rem`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_rem
4067 [`wrapping_neg`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_neg
4068 [`wrapping_shl`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shl
4069 [`wrapping_shr`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shr
4070 [`Wrapping`]: https://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
4071 [`fmt::Formatter`]: https://doc.rust-lang.org/nightly/std/fmt/struct.Formatter.html
4072 [`fmt::Write`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Write.html
4073 [`io::Write`]: https://doc.rust-lang.org/nightly/std/io/trait.Write.html
4074 [`debug_struct`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_struct
4075 [`debug_tuple`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_tuple
4076 [`debug_list`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_list
4077 [`debug_set`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_set
4078 [`debug_map`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_map
4079 [`Debug`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
4080 [strup]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_uppercase
4081 [strlow]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_lowercase
4082 [`to_uppercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_uppercase
4083 [`to_lowercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_lowercase
4084 [`PoisonError`]: https://doc.rust-lang.org/nightly/std/sync/struct.PoisonError.html
4085 [`RwLock`]: https://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html
4086 [`Mutex`]: https://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html
4087 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
4088 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
4089 [`Stdio`]: https://doc.rust-lang.org/nightly/std/process/struct.Stdio.html
4090 [`ChildStdin`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdin.html
4091 [`ChildStdout`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdout.html
4092 [`ChildStderr`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStderr.html
4093 [`io::ErrorKind`]: https://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html
4094 [debugfmt]: https://www.reddit.com/r/rust/comments/3ceaui/psa_produces_prettyprinted_debug_output/
4095 [`DerefMut`]: https://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
4096 [`mem::align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.align_of.html
4097 [align]: https://github.com/rust-lang/rust/pull/25646
4098 [`mem::min_align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.min_align_of.html
4099 [typos]: https://github.com/rust-lang/rust/pull/26087
4100 [nop]: https://github.com/rust-lang/rust/pull/26336
4101 [fat]: https://github.com/rust-lang/rust/pull/26411
4102 [dst]: https://github.com/rust-lang/rfcs/blob/master/text/0982-dst-coercion.md
4103 [parcodegen]: https://github.com/rust-lang/rust/pull/26018
4104 [packed]: https://github.com/rust-lang/rust/pull/25541
4105 [ad]: https://github.com/rust-lang/rust/pull/27382
4106 [win]: https://github.com/rust-lang/rust/pull/25350
4108 Version 1.1.0 (2015-06-25)
4109 =========================
4111 * ~850 changes, numerous bugfixes
4116 * The [`std::fs` module has been expanded][fs] to expand the set of
4117 functionality exposed:
4118 * `DirEntry` now supports optimizations like `file_type` and `metadata` which
4119 don't incur a syscall on some platforms.
4120 * A `symlink_metadata` function has been added.
4121 * The `fs::Metadata` structure now lowers to its OS counterpart, providing
4122 access to all underlying information.
4123 * The compiler now contains extended explanations of many errors. When an error
4124 with an explanation occurs the compiler suggests using the `--explain` flag
4125 to read the explanation. Error explanations are also [available online][err-index].
4126 * Thanks to multiple [improvements][sk] to [type checking][pre], as
4127 well as other work, the time to bootstrap the compiler decreased by
4133 * The [`str::split_whitespace`] method splits a string on unicode
4134 whitespace boundaries.
4135 * On both Windows and Unix, new extension traits provide conversion of
4136 I/O types to and from the underlying system handles. On Unix, these
4137 traits are [`FromRawFd`] and [`AsRawFd`], on Windows `FromRawHandle`
4138 and `AsRawHandle`. These are implemented for `File`, `TcpStream`,
4139 `TcpListener`, and `UpdSocket`. Further implementations for
4140 `std::process` will be stabilized later.
4141 * On Unix, [`std::os::unix::symlink`] creates symlinks. On
4142 Windows, symlinks can be created with
4143 `std::os::windows::symlink_dir` and
4144 `std::os::windows::symlink_file`.
4145 * The `mpsc::Receiver` type can now be converted into an iterator with
4146 `into_iter` on the [`IntoIterator`] trait.
4147 * `Ipv4Addr` can be created from `u32` with the `From<u32>`
4148 implementation of the [`From`] trait.
4149 * The `Debug` implementation for `RangeFull` [creates output that is
4150 more consistent with other implementations][rf].
4151 * [`Debug` is implemented for `File`][file].
4152 * The `Default` implementation for `Arc` [no longer requires `Sync +
4154 * [The `Iterator` methods `count`, `nth`, and `last` have been
4155 overridden for slices to have O(1) performance instead of O(n)][si].
4156 * Incorrect handling of paths on Windows has been improved in both the
4157 compiler and the standard library.
4158 * [`AtomicPtr` gained a `Default` implementation][ap].
4159 * In accordance with Rust's policy on arithmetic overflow `abs` now
4160 [panics on overflow when debug assertions are enabled][abs].
4161 * The [`Cloned`] iterator, which was accidentally left unstable for
4162 1.0 [has been stabilized][c].
4163 * The [`Incoming`] iterator, which iterates over incoming TCP
4164 connections, and which was accidentally unnamable in 1.0, [is now
4165 properly exported][inc].
4166 * [`BinaryHeap`] no longer corrupts itself [when functions called by
4167 `sift_up` or `sift_down` panic][bh].
4168 * The [`split_off`] method of `LinkedList` [no longer corrupts
4169 the list in certain scenarios][ll].
4174 * Type checking performance [has improved notably][sk] with
4175 [multiple improvements][pre].
4176 * The compiler [suggests code changes][ch] for more errors.
4177 * rustc and it's build system have experimental support for [building
4178 toolchains against MUSL][m] instead of glibc on Linux.
4179 * The compiler defines the `target_env` cfg value, which is used for
4180 distinguishing toolchains that are otherwise for the same
4181 platform. Presently this is set to `gnu` for common GNU Linux
4182 targets and for MinGW targets, and `musl` for MUSL Linux targets.
4183 * The [`cargo rustc`][crc] command invokes a build with custom flags
4185 * [Android executables are always position independent][pie].
4186 * [The `drop_with_repr_extern` lint warns about mixing `repr(C)`
4189 [`str::split_whitespace`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_whitespace
4190 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
4191 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
4192 [`std::os::unix::symlink`]: https://doc.rust-lang.org/nightly/std/os/unix/fs/fn.symlink.html
4193 [`IntoIterator`]: https://doc.rust-lang.org/nightly/std/iter/trait.IntoIterator.html
4194 [`From`]: https://doc.rust-lang.org/nightly/std/convert/trait.From.html
4195 [rf]: https://github.com/rust-lang/rust/pull/24491
4196 [err-index]: https://doc.rust-lang.org/error-index.html
4197 [sk]: https://github.com/rust-lang/rust/pull/24615
4198 [pre]: https://github.com/rust-lang/rust/pull/25323
4199 [file]: https://github.com/rust-lang/rust/pull/24598
4200 [ch]: https://github.com/rust-lang/rust/pull/24683
4201 [arc]: https://github.com/rust-lang/rust/pull/24695
4202 [si]: https://github.com/rust-lang/rust/pull/24701
4203 [ap]: https://github.com/rust-lang/rust/pull/24834
4204 [m]: https://github.com/rust-lang/rust/pull/24777
4205 [fs]: https://github.com/rust-lang/rfcs/blob/master/text/1044-io-fs-2.1.md
4206 [crc]: https://github.com/rust-lang/cargo/pull/1568
4207 [pie]: https://github.com/rust-lang/rust/pull/24953
4208 [abs]: https://github.com/rust-lang/rust/pull/25441
4209 [c]: https://github.com/rust-lang/rust/pull/25496
4210 [`Cloned`]: https://doc.rust-lang.org/nightly/std/iter/struct.Cloned.html
4211 [`Incoming`]: https://doc.rust-lang.org/nightly/std/net/struct.Incoming.html
4212 [inc]: https://github.com/rust-lang/rust/pull/25522
4213 [bh]: https://github.com/rust-lang/rust/pull/25856
4214 [`BinaryHeap`]: https://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html
4215 [ll]: https://github.com/rust-lang/rust/pull/26022
4216 [`split_off`]: https://doc.rust-lang.org/nightly/collections/linked_list/struct.LinkedList.html#method.split_off
4217 [drop]: https://github.com/rust-lang/rust/pull/24935
4219 Version 1.0.0 (2015-05-15)
4220 ========================
4222 * ~1500 changes, numerous bugfixes
4227 * The vast majority of the standard library is now `#[stable]`. It is
4228 no longer possible to use unstable features with a stable build of
4230 * Many popular crates on [crates.io] now work on the stable release
4232 * Arithmetic on basic integer types now [checks for overflow in debug
4238 * Several [restrictions have been added to trait coherence][coh] in
4239 order to make it easier for upstream authors to change traits
4240 without breaking downstream code.
4241 * Digits of binary and octal literals are [lexed more eagerly][lex] to
4242 improve error messages and macro behavior. For example, `0b1234` is
4243 now lexed as `0b1234` instead of two tokens, `0b1` and `234`.
4244 * Trait bounds [are always invariant][inv], eliminating the need for
4245 the `PhantomFn` and `MarkerTrait` lang items, which have been
4247 * ["-" is no longer a valid character in crate names][cr], the `extern crate
4248 "foo" as bar` syntax has been replaced with `extern crate foo as
4249 bar`, and Cargo now automatically translates "-" in *package* names
4250 to underscore for the crate name.
4251 * [Lifetime shadowing is an error][lt].
4252 * [`Send` no longer implies `'static`][send-rfc].
4253 * [UFCS now supports trait-less associated paths][moar-ufcs] like
4254 `MyType::default()`.
4255 * Primitive types [now have inherent methods][prim-inherent],
4256 obviating the need for extension traits like `SliceExt`.
4257 * Methods with `Self: Sized` in their `where` clause are [considered
4258 object-safe][self-sized], allowing many extension traits like
4259 `IteratorExt` to be merged into the traits they extended.
4260 * You can now [refer to associated types][assoc-where] whose
4261 corresponding trait bounds appear only in a `where` clause.
4262 * The final bits of [OIBIT landed][oibit-final], meaning that traits
4263 like `Send` and `Sync` are now library-defined.
4264 * A [Reflect trait][reflect] was introduced, which means that
4265 downcasting via the `Any` trait is effectively limited to concrete
4266 types. This helps retain the potentially-important "parametricity"
4267 property: generic code cannot behave differently for different type
4268 arguments except in minor ways.
4269 * The `unsafe_destructor` feature is now deprecated in favor of the
4270 [new `dropck`][dropck]. This change is a major reduction in unsafe
4276 * The `thread_local` module [has been renamed to `std::thread`][th].
4277 * The methods of `IteratorExt` [have been moved to the `Iterator`
4279 * Several traits that implement Rust's conventions for type
4280 conversions, `AsMut`, `AsRef`, `From`, and `Into` have been
4281 [centralized in the `std::convert` module][con].
4282 * The `FromError` trait [was removed in favor of `From`][fe].
4283 * The basic sleep function [has moved to
4284 `std::thread::sleep_ms`][slp].
4285 * The `splitn` function now takes an `n` parameter that represents the
4286 number of items yielded by the returned iterator [instead of the
4287 number of 'splits'][spl].
4288 * [On Unix, all file descriptors are `CLOEXEC` by default][clo].
4289 * [Derived implementations of `PartialOrd` now order enums according
4290 to their explicitly-assigned discriminants][po].
4291 * [Methods for searching strings are generic over `Pattern`s][pat],
4292 implemented presently by `&char`, `&str`, `FnMut(char) -> bool` and
4294 * [In method resolution, object methods are resolved before inherent
4296 * [`String::from_str` has been deprecated in favor of the `From` impl,
4297 `String::from`][sf].
4298 * [`io::Error` implements `Sync`][ios].
4299 * [The `words` method on `&str` has been replaced with
4300 `split_whitespace`][sw], to avoid answering the tricky question, 'what is
4302 * The new path and IO modules are complete and `#[stable]`. This
4303 was the major library focus for this cycle.
4304 * The path API was [revised][path-normalize] to normalize `.`,
4305 adjusting the tradeoffs in favor of the most common usage.
4306 * A large number of remaining APIs in `std` were also stabilized
4307 during this cycle; about 75% of the non-deprecated API surface
4309 * The new [string pattern API][string-pattern] landed, which makes
4310 the string slice API much more internally consistent and flexible.
4311 * A new set of [generic conversion traits][conversion] replaced
4312 many existing ad hoc traits.
4313 * Generic numeric traits were [completely removed][num-traits]. This
4314 was made possible thanks to inherent methods for primitive types,
4315 and the removal gives maximal flexibility for designing a numeric
4316 hierarchy in the future.
4317 * The `Fn` traits are now related via [inheritance][fn-inherit]
4318 and provide ergonomic [blanket implementations][fn-blanket].
4319 * The `Index` and `IndexMut` traits were changed to
4320 [take the index by value][index-value], enabling code like
4321 `hash_map["string"]` to work.
4322 * `Copy` now [inherits][copy-clone] from `Clone`, meaning that all
4323 `Copy` data is known to be `Clone` as well.
4328 * Many errors now have extended explanations that can be accessed with
4329 the `--explain` flag to `rustc`.
4330 * Many new examples have been added to the standard library
4332 * rustdoc has received a number of improvements focused on completion
4334 * Metadata was tuned, shrinking binaries [by 27%][metadata-shrink].
4335 * Much headway was made on ecosystem-wide CI, making it possible
4336 to [compare builds for breakage][ci-compare].
4339 [crates.io]: http://crates.io
4340 [clo]: https://github.com/rust-lang/rust/pull/24034
4341 [coh]: https://github.com/rust-lang/rfcs/blob/master/text/1023-rebalancing-coherence.md
4342 [con]: https://github.com/rust-lang/rust/pull/23875
4343 [cr]: https://github.com/rust-lang/rust/pull/23419
4344 [fe]: https://github.com/rust-lang/rust/pull/23879
4345 [ie]: https://github.com/rust-lang/rust/pull/23300
4346 [inv]: https://github.com/rust-lang/rust/pull/23938
4347 [ios]: https://github.com/rust-lang/rust/pull/24133
4348 [lex]: https://github.com/rust-lang/rfcs/blob/master/text/0879-small-base-lexing.md
4349 [lt]: https://github.com/rust-lang/rust/pull/24057
4350 [meth]: https://github.com/rust-lang/rust/pull/24056
4351 [pat]: https://github.com/rust-lang/rfcs/blob/master/text/0528-string-patterns.md
4352 [po]: https://github.com/rust-lang/rust/pull/24270
4353 [sf]: https://github.com/rust-lang/rust/pull/24517
4354 [slp]: https://github.com/rust-lang/rust/pull/23949
4355 [spl]: https://github.com/rust-lang/rfcs/blob/master/text/0979-align-splitn-with-other-languages.md
4356 [sw]: https://github.com/rust-lang/rfcs/blob/master/text/1054-str-words.md
4357 [th]: https://github.com/rust-lang/rfcs/blob/master/text/0909-move-thread-local-to-std-thread.md
4358 [send-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0458-send-improvements.md
4359 [moar-ufcs]: https://github.com/rust-lang/rust/pull/22172
4360 [prim-inherent]: https://github.com/rust-lang/rust/pull/23104
4361 [overflow]: https://github.com/rust-lang/rfcs/blob/master/text/0560-integer-overflow.md
4362 [metadata-shrink]: https://github.com/rust-lang/rust/pull/22971
4363 [self-sized]: https://github.com/rust-lang/rust/pull/22301
4364 [assoc-where]: https://github.com/rust-lang/rust/pull/22512
4365 [string-pattern]: https://github.com/rust-lang/rust/pull/22466
4366 [oibit-final]: https://github.com/rust-lang/rust/pull/21689
4367 [reflect]: https://github.com/rust-lang/rust/pull/23712
4368 [conversion]: https://github.com/rust-lang/rfcs/pull/529
4369 [num-traits]: https://github.com/rust-lang/rust/pull/23549
4370 [index-value]: https://github.com/rust-lang/rust/pull/23601
4371 [dropck]: https://github.com/rust-lang/rfcs/pull/769
4372 [ci-compare]: https://gist.github.com/brson/a30a77836fbec057cbee
4373 [fn-inherit]: https://github.com/rust-lang/rust/pull/23282
4374 [fn-blanket]: https://github.com/rust-lang/rust/pull/23895
4375 [copy-clone]: https://github.com/rust-lang/rust/pull/23860
4376 [path-normalize]: https://github.com/rust-lang/rust/pull/23229
4379 Version 1.0.0-alpha.2 (2015-02-20)
4380 =====================================
4382 * ~1300 changes, numerous bugfixes
4386 * The various I/O modules were [overhauled][io-rfc] to reduce
4387 unnecessary abstractions and provide better interoperation with
4388 the underlying platform. The old `io` module remains temporarily
4390 * The standard library now [participates in feature gating][feat],
4391 so use of unstable libraries now requires a `#![feature(...)]`
4392 attribute. The impact of this change is [described on the
4393 forum][feat-forum]. [RFC][feat-rfc].
4397 * `for` loops [now operate on the `IntoIterator` trait][into],
4398 which eliminates the need to call `.iter()`, etc. to iterate
4399 over collections. There are some new subtleties to remember
4400 though regarding what sort of iterators various types yield, in
4401 particular that `for foo in bar { }` yields values from a move
4402 iterator, destroying the original collection. [RFC][into-rfc].
4403 * Objects now have [default lifetime bounds][obj], so you don't
4404 have to write `Box<Trait+'static>` when you don't care about
4405 storing references. [RFC][obj-rfc].
4406 * In types that implement `Drop`, [lifetimes must outlive the
4407 value][drop]. This will soon make it possible to safely
4408 implement `Drop` for types where `#[unsafe_destructor]` is now
4409 required. Read the [gorgeous RFC][drop-rfc] for details.
4410 * The fully qualified <T as Trait>::X syntax lets you set the Self
4411 type for a trait method or associated type. [RFC][ufcs-rfc].
4412 * References to types that implement `Deref<U>` now [automatically
4413 coerce to references][deref] to the dereferenced type `U`,
4414 e.g. `&T where T: Deref<U>` automatically coerces to `&U`. This
4415 should eliminate many unsightly uses of `&*`, as when converting
4416 from references to vectors into references to
4417 slices. [RFC][deref-rfc].
4418 * The explicit [closure kind syntax][close] (`|&:|`, `|&mut:|`,
4419 `|:|`) is obsolete and closure kind is inferred from context.
4420 * [`Self` is a keyword][Self].
4424 * The `Show` and `String` formatting traits [have been
4425 renamed][fmt] to `Debug` and `Display` to more clearly reflect
4426 their related purposes. Automatically getting a string
4427 conversion to use with `format!("{:?}", something_to_debug)` is
4428 now written `#[derive(Debug)]`.
4429 * Abstract [OS-specific string types][osstr], `std::ff::{OsString,
4430 OsStr}`, provide strings in platform-specific encodings for easier
4431 interop with system APIs. [RFC][osstr-rfc].
4432 * The `boxed::into_raw` and `Box::from_raw` functions [convert
4433 between `Box<T>` and `*mut T`][boxraw], a common pattern for
4434 creating raw pointers.
4438 * Certain long error messages of the form 'expected foo found bar'
4439 are now [split neatly across multiple
4440 lines][multiline]. Examples in the PR.
4441 * On Unix Rust can be [uninstalled][un] by running
4442 `/usr/local/lib/rustlib/uninstall.sh`.
4443 * The `#[rustc_on_unimplemented]` attribute, requiring the
4444 'on_unimplemented' feature, lets rustc [display custom error
4445 messages when a trait is expected to be implemented for a type
4450 * Rust is tested against a [LALR grammar][lalr], which parses
4451 almost all the Rust files that rustc does.
4453 [boxraw]: https://github.com/rust-lang/rust/pull/21318
4454 [close]: https://github.com/rust-lang/rust/pull/21843
4455 [deref]: https://github.com/rust-lang/rust/pull/21351
4456 [deref-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0241-deref-conversions.md
4457 [drop]: https://github.com/rust-lang/rust/pull/21972
4458 [drop-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
4459 [feat]: https://github.com/rust-lang/rust/pull/21248
4460 [feat-forum]: https://users.rust-lang.org/t/psa-important-info-about-rustcs-new-feature-staging/82/5
4461 [feat-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0507-release-channels.md
4462 [fmt]: https://github.com/rust-lang/rust/pull/21457
4463 [into]: https://github.com/rust-lang/rust/pull/20790
4464 [into-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md#intoiterator-and-iterable
4465 [io-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
4466 [lalr]: https://github.com/rust-lang/rust/pull/21452
4467 [multiline]: https://github.com/rust-lang/rust/pull/19870
4468 [obj]: https://github.com/rust-lang/rust/pull/22230
4469 [obj-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0599-default-object-bound.md
4470 [onun]: https://github.com/rust-lang/rust/pull/20889
4471 [osstr]: https://github.com/rust-lang/rust/pull/21488
4472 [osstr-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
4473 [Self]: https://github.com/rust-lang/rust/pull/22158
4474 [ufcs-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0132-ufcs.md
4475 [un]: https://github.com/rust-lang/rust/pull/22256
4478 Version 1.0.0-alpha (2015-01-09)
4479 ==================================
4481 * ~2400 changes, numerous bugfixes
4485 * The language itself is considered feature complete for 1.0,
4486 though there will be many usability improvements and bugfixes
4487 before the final release.
4488 * Nearly 50% of the public API surface of the standard library has
4489 been declared 'stable'. Those interfaces are unlikely to change
4491 * The long-running debate over integer types has been
4492 [settled][ints]: Rust will ship with types named `isize` and
4493 `usize`, rather than `int` and `uint`, for pointer-sized
4494 integers. Guidelines will be rolled out during the alpha cycle.
4495 * Most crates that are not `std` have been moved out of the Rust
4496 distribution into the Cargo ecosystem so they can evolve
4497 separately and don't need to be stabilized as quickly, including
4498 'time', 'getopts', 'num', 'regex', and 'term'.
4499 * Documentation continues to be expanded with more API coverage, more
4500 examples, and more in-depth explanations. The guides have been
4501 consolidated into [The Rust Programming Language][trpl].
4502 * "[Rust By Example][rbe]" is now maintained by the Rust team.
4503 * All official Rust binary installers now come with [Cargo], the
4504 Rust package manager.
4508 * Closures have been [completely redesigned][unboxed] to be
4509 implemented in terms of traits, can now be used as generic type
4510 bounds and thus monomorphized and inlined, or via an opaque
4511 pointer (boxed) as in the old system. The new system is often
4512 referred to as 'unboxed' closures.
4513 * Traits now support [associated types][assoc], allowing families
4514 of related types to be defined together and used generically in
4516 * Enum variants are [namespaced by their type names][enum].
4517 * [`where` clauses][where] provide a more versatile and attractive
4518 syntax for specifying generic bounds, though the previous syntax
4520 * Rust again picks a [fallback][fb] (either i32 or f64) for uninferred
4522 * Rust [no longer has a runtime][rt] of any description, and only
4523 supports OS threads, not green threads.
4524 * At long last, Rust has been overhauled for 'dynamically-sized
4525 types' ([DST]), which integrates 'fat pointers' (object types,
4526 arrays, and `str`) more deeply into the type system, making it
4528 * Rust now has a general [range syntax][range], `i..j`, `i..`, and
4529 `..j` that produce range types and which, when combined with the
4530 `Index` operator and multidispatch, leads to a convenient slice
4532 * The new range syntax revealed an ambiguity in the fixed-length
4533 array syntax, so now fixed length arrays [are written `[T;
4535 * The `Copy` trait is no longer implemented automatically. Unsafe
4536 pointers no longer implement `Sync` and `Send` so types
4537 containing them don't automatically either. `Sync` and `Send`
4538 are now 'unsafe traits' so one can "forcibly" implement them via
4539 `unsafe impl` if a type confirms to the requirements for them
4540 even though the internals do not (e.g. structs containing unsafe
4541 pointers like `Arc`). These changes are intended to prevent some
4542 footguns and are collectively known as [opt-in built-in
4543 traits][oibit] (though `Sync` and `Send` will soon become pure
4544 library types unknown to the compiler).
4545 * Operator traits now take their operands [by value][ops], and
4546 comparison traits can use multidispatch to compare one type
4547 against multiple other types, allowing e.g. `String` to be
4548 compared with `&str`.
4549 * `if let` and `while let` are no longer feature-gated.
4550 * Rust has adopted a more [uniform syntax for escaping unicode
4551 characters][unicode].
4552 * `macro_rules!` [has been declared stable][mac]. Though it is a
4553 flawed system it is sufficiently popular that it must be usable
4554 for 1.0. Effort has gone into [future-proofing][mac-future] it
4555 in ways that will allow other macro systems to be developed in
4556 parallel, and won't otherwise impact the evolution of the
4558 * The prelude has been [pared back significantly][prelude] such
4559 that it is the minimum necessary to support the most pervasive
4560 code patterns, and through [generalized where clauses][where]
4561 many of the prelude extension traits have been consolidated.
4562 * Rust's rudimentary reflection [has been removed][refl], as it
4563 incurred too much code generation for little benefit.
4564 * [Struct variants][structvars] are no longer feature-gated.
4565 * Trait bounds can be [polymorphic over lifetimes][hrtb]. Also
4566 known as 'higher-ranked trait bounds', this crucially allows
4567 unboxed closures to work.
4568 * Macros invocations surrounded by parens or square brackets and
4569 not terminated by a semicolon are [parsed as
4570 expressions][macros], which makes expressions like `vec![1i32,
4571 2, 3].len()` work as expected.
4572 * Trait objects now implement their traits automatically, and
4573 traits that can be coerced to objects now must be [object
4575 * Automatically deriving traits is now done with `#[derive(...)]`
4576 not `#[deriving(...)]` for [consistency with other naming
4577 conventions][derive].
4578 * Importing the containing module or enum at the same time as
4579 items or variants they contain is [now done with `self` instead
4580 of `mod`][self], as in use `foo::{self, bar}`
4581 * Glob imports are no longer feature-gated.
4582 * The `box` operator and `box` patterns have been feature-gated
4583 pending a redesign. For now unique boxes should be allocated
4584 like other containers, with `Box::new`.
4588 * A [series][coll1] of [efforts][coll2] to establish
4589 [conventions][coll3] for collections types has resulted in API
4590 improvements throughout the standard library.
4591 * New [APIs for error handling][err] provide ergonomic interop
4592 between error types, and [new conventions][err-conv] describe
4593 more clearly the recommended error handling strategies in Rust.
4594 * The `fail!` macro has been renamed to [`panic!`][panic] so that
4595 it is easier to discuss failure in the context of error handling
4596 without making clarifications as to whether you are referring to
4597 the 'fail' macro or failure more generally.
4598 * On Linux, `OsRng` prefers the new, more reliable `getrandom`
4599 syscall when available.
4600 * The 'serialize' crate has been renamed 'rustc-serialize' and
4601 moved out of the distribution to Cargo. Although it is widely
4602 used now, it is expected to be superseded in the near future.
4603 * The `Show` formatter, typically implemented with
4604 `#[derive(Show)]` is [now requested with the `{:?}`
4605 specifier][show] and is intended for use by all types, for uses
4606 such as `println!` debugging. The new `String` formatter must be
4607 implemented by hand, uses the `{}` specifier, and is intended
4608 for full-fidelity conversions of things that can logically be
4609 represented as strings.
4613 * [Flexible target specification][flex] allows rustc's code
4614 generation to be configured to support otherwise-unsupported
4616 * Rust comes with rust-gdb and rust-lldb scripts that launch their
4617 respective debuggers with Rust-appropriate pretty-printing.
4618 * The Windows installation of Rust is distributed with the
4619 MinGW components currently required to link binaries on that
4624 * Nullable enum optimizations have been extended to more types so
4625 that e.g. `Option<Vec<T>>` and `Option<String>` take up no more
4626 space than the inner types themselves.
4627 * Work has begun on supporting AArch64.
4629 [Cargo]: https://crates.io
4630 [unboxed]: http://smallcultfollowing.com/babysteps/blog/2014/11/26/purging-proc/
4631 [enum]: https://github.com/rust-lang/rfcs/blob/master/text/0390-enum-namespacing.md
4632 [flex]: https://github.com/rust-lang/rfcs/blob/master/text/0131-target-specification.md
4633 [err]: https://github.com/rust-lang/rfcs/blob/master/text/0201-error-chaining.md
4634 [err-conv]: https://github.com/rust-lang/rfcs/blob/master/text/0236-error-conventions.md
4635 [rt]: https://github.com/rust-lang/rfcs/blob/master/text/0230-remove-runtime.md
4636 [mac]: https://github.com/rust-lang/rfcs/blob/master/text/0453-macro-reform.md
4637 [mac-future]: https://github.com/rust-lang/rfcs/pull/550
4638 [DST]: http://smallcultfollowing.com/babysteps/blog/2014/01/05/dst-take-5/
4639 [coll1]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md
4640 [coll2]: https://github.com/rust-lang/rfcs/blob/master/text/0509-collections-reform-part-2.md
4641 [coll3]: https://github.com/rust-lang/rfcs/blob/master/text/0216-collection-views.md
4642 [ops]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md
4643 [prelude]: https://github.com/rust-lang/rfcs/blob/master/text/0503-prelude-stabilization.md
4644 [where]: https://github.com/rust-lang/rfcs/blob/master/text/0135-where.md
4645 [refl]: https://github.com/rust-lang/rfcs/blob/master/text/0379-remove-reflection.md
4646 [panic]: https://github.com/rust-lang/rfcs/blob/master/text/0221-panic.md
4647 [structvars]: https://github.com/rust-lang/rfcs/blob/master/text/0418-struct-variants.md
4648 [hrtb]: https://github.com/rust-lang/rfcs/blob/master/text/0387-higher-ranked-trait-bounds.md
4649 [unicode]: https://github.com/rust-lang/rfcs/blob/master/text/0446-es6-unicode-escapes.md
4650 [oibit]: https://github.com/rust-lang/rfcs/blob/master/text/0019-opt-in-builtin-traits.md
4651 [macros]: https://github.com/rust-lang/rfcs/blob/master/text/0378-expr-macros.md
4652 [range]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md#indexing-and-slicing
4653 [arrays]: https://github.com/rust-lang/rfcs/blob/master/text/0520-new-array-repeat-syntax.md
4654 [show]: https://github.com/rust-lang/rfcs/blob/master/text/0504-show-stabilization.md
4655 [derive]: https://github.com/rust-lang/rfcs/blob/master/text/0534-deriving2derive.md
4656 [self]: https://github.com/rust-lang/rfcs/blob/master/text/0532-self-in-use.md
4657 [fb]: https://github.com/rust-lang/rfcs/blob/master/text/0212-restore-int-fallback.md
4658 [objsafe]: https://github.com/rust-lang/rfcs/blob/master/text/0255-object-safety.md
4659 [assoc]: https://github.com/rust-lang/rfcs/blob/master/text/0195-associated-items.md
4660 [ints]: https://github.com/rust-lang/rfcs/pull/544#issuecomment-68760871
4661 [trpl]: https://doc.rust-lang.org/book/index.html
4662 [rbe]: http://rustbyexample.com/
4665 Version 0.12.0 (2014-10-09)
4666 =============================
4668 * ~1900 changes, numerous bugfixes
4672 * The introductory documentation (now called The Rust Guide) has
4673 been completely rewritten, as have a number of supplementary
4675 * Rust's package manager, Cargo, continues to improve and is
4676 sometimes considered to be quite awesome.
4677 * Many API's in `std` have been reviewed and updated for
4678 consistency with the in-development Rust coding
4679 guidelines. The standard library documentation tracks
4680 stabilization progress.
4681 * Minor libraries have been moved out-of-tree to the rust-lang org
4682 on GitHub: uuid, semver, glob, num, hexfloat, fourcc. They can
4683 be installed with Cargo.
4684 * Lifetime elision allows lifetime annotations to be left off of
4685 function declarations in many common scenarios.
4686 * Rust now works on 64-bit Windows.
4689 * Indexing can be overloaded with the `Index` and `IndexMut`
4691 * The `if let` construct takes a branch only if the `let` pattern
4692 matches, currently behind the 'if_let' feature gate.
4693 * 'where clauses', a more flexible syntax for specifying trait
4694 bounds that is more aesthetic, have been added for traits and
4695 free functions. Where clauses will in the future make it
4696 possible to constrain associated types, which would be
4697 impossible with the existing syntax.
4698 * A new slicing syntax (e.g. `[0..4]`) has been introduced behind
4699 the 'slicing_syntax' feature gate, and can be overloaded with
4700 the `Slice` or `SliceMut` traits.
4701 * The syntax for matching of sub-slices has been changed to use a
4702 postfix `..` instead of prefix (.e.g. `[a, b, c..]`), for
4703 consistency with other uses of `..` and to future-proof
4704 potential additional uses of the syntax.
4705 * The syntax for matching inclusive ranges in patterns has changed
4706 from `0..3` to `0...4` to be consistent with the exclusive range
4708 * Matching of sub-slices in non-tail positions (e.g. `[a.., b,
4709 c]`) has been put behind the 'advanced_slice_patterns' feature
4710 gate and may be removed in the future.
4711 * Components of tuples and tuple structs can be extracted using
4712 the `value.0` syntax, currently behind the `tuple_indexing`
4714 * The `#[crate_id]` attribute is no longer supported; versioning
4715 is handled by the package manager.
4716 * Renaming crate imports are now written `extern crate foo as bar`
4717 instead of `extern crate bar = foo`.
4718 * Renaming use statements are now written `use foo as bar` instead
4720 * `let` and `match` bindings and argument names in macros are now
4722 * The new, more efficient, closure types ('unboxed closures') have
4723 been added under a feature gate, 'unboxed_closures'. These will
4724 soon replace the existing closure types, once higher-ranked
4725 trait lifetimes are added to the language.
4726 * `move` has been added as a keyword, for indicating closures
4727 that capture by value.
4728 * Mutation and assignment is no longer allowed in pattern guards.
4729 * Generic structs and enums can now have trait bounds.
4730 * The `Share` trait is now called `Sync` to free up the term
4731 'shared' to refer to 'shared reference' (the default reference
4733 * Dynamically-sized types have been mostly implemented,
4734 unifying the behavior of fat-pointer types with the rest of the
4736 * As part of dynamically-sized types, the `Sized` trait has been
4737 introduced, which qualifying types implement by default, and
4738 which type parameters expect by default. To specify that a type
4739 parameter does not need to be sized, write `<Sized? T>`. Most
4740 types are `Sized`, notable exceptions being unsized arrays
4741 (`[T]`) and trait types.
4742 * Closures can return `!`, as in `|| -> !` or `proc() -> !`.
4743 * Lifetime bounds can now be applied to type parameters and object
4745 * The old, reference counted GC type, `Gc<T>` which was once
4746 denoted by the `@` sigil, has finally been removed. GC will be
4747 revisited in the future.
4750 * Library documentation has been improved for a number of modules.
4751 * Bit-vectors, collections::bitv has been modernized.
4752 * The url crate is deprecated in favor of
4753 http://github.com/servo/rust-url, which can be installed with
4755 * Most I/O stream types can be cloned and subsequently closed from
4757 * A `std::time::Duration` type has been added for use in I/O
4758 methods that rely on timers, as well as in the 'time' crate's
4759 `Timespec` arithmetic.
4760 * The runtime I/O abstraction layer that enabled the green thread
4761 scheduler to do non-thread-blocking I/O has been removed, along
4762 with the libuv-based implementation employed by the green thread
4763 scheduler. This will greatly simplify the future I/O work.
4764 * `collections::btree` has been rewritten to have a more
4765 idiomatic and efficient design.
4768 * rustdoc output now indicates the stability levels of API's.
4769 * The `--crate-name` flag can specify the name of the crate
4770 being compiled, like `#[crate_name]`.
4771 * The `-C metadata` specifies additional metadata to hash into
4772 symbol names, and `-C extra-filename` specifies additional
4773 information to put into the output filename, for use by the
4774 package manager for versioning.
4775 * debug info generation has continued to improve and should be
4776 more reliable under both gdb and lldb.
4777 * rustc has experimental support for compiling in parallel
4778 using the `-C codegen-units` flag.
4779 * rustc no longer encodes rpath information into binaries by
4783 * Stack usage has been optimized with LLVM lifetime annotations.
4784 * Official Rust binaries on Linux are more compatible with older
4785 kernels and distributions, built on CentOS 5.10.
4788 Version 0.11.0 (2014-07-02)
4789 ==========================
4791 * ~1700 changes, numerous bugfixes
4794 * ~[T] has been removed from the language. This type is superseded by
4796 * ~str has been removed from the language. This type is superseded by
4798 * ~T has been removed from the language. This type is superseded by the
4800 * @T has been removed from the language. This type is superseded by the
4801 standard library's std::gc::Gc<T> type.
4802 * Struct fields are now all private by default.
4803 * Vector indices and shift amounts are both required to be a `uint`
4804 instead of any integral type.
4805 * Byte character, byte string, and raw byte string literals are now all
4806 supported by prefixing the normal literal with a `b`.
4807 * Multiple ABIs are no longer allowed in an ABI string
4808 * The syntax for lifetimes on closures/procedures has been tweaked
4809 slightly: `<'a>|A, B|: 'b + K -> T`
4810 * Floating point modulus has been removed from the language; however it
4811 is still provided by a library implementation.
4812 * Private enum variants are now disallowed.
4813 * The `priv` keyword has been removed from the language.
4814 * A closure can no longer be invoked through a &-pointer.
4815 * The `use foo, bar, baz;` syntax has been removed from the language.
4816 * The transmute intrinsic no longer works on type parameters.
4817 * Statics now allow blocks/items in their definition.
4818 * Trait bounds are separated from objects with + instead of : now.
4819 * Objects can no longer be read while they are mutably borrowed.
4820 * The address of a static is now marked as insignificant unless the
4821 #[inline(never)] attribute is placed it.
4822 * The #[unsafe_destructor] attribute is now behind a feature gate.
4823 * Struct literals are no longer allowed in ambiguous positions such as
4824 if, while, match, and for..in.
4825 * Declaration of lang items and intrinsics are now feature-gated by
4827 * Integral literals no longer default to `int`, and floating point
4828 literals no longer default to `f64`. Literals must be suffixed with an
4829 appropriate type if inference cannot determine the type of the
4831 * The Box<T> type is no longer implicitly borrowed to &mut T.
4832 * Procedures are now required to not capture borrowed references.
4835 * The standard library is now a "facade" over a number of underlying
4836 libraries. This means that development on the standard library should
4837 be speedier due to smaller crates, as well as a clearer line between
4839 * A new library, libcore, lives under the standard library's facade
4840 which is Rust's "0-assumption" library, suitable for embedded and
4841 kernel development for example.
4842 * A regex crate has been added to the standard distribution. This crate
4843 includes statically compiled regular expressions.
4844 * The unwrap/unwrap_err methods on Result require a Show bound for
4845 better error messages.
4846 * The return types of the std::comm primitives have been centralized
4847 around the Result type.
4848 * A number of I/O primitives have gained the ability to time out their
4850 * A number of I/O primitives have gained the ability to close their
4851 reading/writing halves to cancel pending operations.
4852 * Reverse iterator methods have been removed in favor of `rev()` on
4853 their forward-iteration counterparts.
4854 * A bitflags! macro has been added to enable easy interop with C and
4855 management of bit flags.
4856 * A debug_assert! macro is now provided which is disabled when
4857 `--cfg ndebug` is passed to the compiler.
4858 * A graphviz crate has been added for creating .dot files.
4859 * The std::cast module has been migrated into std::mem.
4860 * The std::local_data api has been migrated from freestanding functions
4861 to being based on methods.
4862 * The Pod trait has been renamed to Copy.
4863 * jemalloc has been added as the default allocator for types.
4864 * The API for allocating memory has been changed to use proper alignment
4865 and sized deallocation
4866 * Connecting a TcpStream or binding a TcpListener is now based on a
4867 string address and a u16 port. This allows connecting to a hostname as
4869 * The Reader trait now contains a core method, read_at_least(), which
4870 correctly handles many repeated 0-length reads.
4871 * The process-spawning API is now centered around a builder-style
4873 * The :? printing qualifier has been moved from the standard library to
4874 an external libdebug crate.
4875 * Eq/Ord have been renamed to PartialEq/PartialOrd. TotalEq/TotalOrd
4876 have been renamed to Eq/Ord.
4877 * The select/plural methods have been removed from format!. The escapes
4878 for { and } have also changed from \{ and \} to {{ and }},
4880 * The TaskBuilder API has been re-worked to be a true builder, and
4881 extension traits for spawning native/green tasks have been added.
4884 * All breaking changes to the language or libraries now have their
4885 commit message annotated with `[breaking-change]` to allow for easy
4886 discovery of breaking changes.
4887 * The compiler will now try to suggest how to annotate lifetimes if a
4888 lifetime-related error occurs.
4889 * Debug info continues to be improved greatly with general bug fixes and
4890 better support for situations like link time optimization (LTO).
4891 * Usage of syntax extensions when cross-compiling has been fixed.
4892 * Functionality equivalent to GCC & Clang's -ffunction-sections,
4893 -fdata-sections and --gc-sections has been enabled by default
4894 * The compiler is now stricter about where it will load module files
4895 from when a module is declared via `mod foo;`.
4896 * The #[phase(syntax)] attribute has been renamed to #[phase(plugin)].
4897 Syntax extensions are now discovered via a "plugin registrar" type
4898 which will be extended in the future to other various plugins.
4899 * Lints have been restructured to allow for dynamically loadable lints.
4900 * A number of rustdoc improvements:
4901 * The HTML output has been visually redesigned.
4902 * Markdown is now powered by hoedown instead of sundown.
4903 * Searching heuristics have been greatly improved.
4904 * The search index has been reduced in size by a great amount.
4905 * Cross-crate documentation via `pub use` has been greatly improved.
4906 * Primitive types are now hyperlinked and documented.
4907 * Documentation has been moved from static.rust-lang.org/doc to
4909 * A new sandbox, play.rust-lang.org, is available for running and
4910 sharing rust code examples on-line.
4911 * Unused attributes are now more robustly warned about.
4912 * The dead_code lint now warns about unused struct fields.
4913 * Cross-compiling to iOS is now supported.
4914 * Cross-compiling to mipsel is now supported.
4915 * Stability attributes are now inherited by default and no longer apply
4916 to intra-crate usage, only inter-crate usage.
4917 * Error message related to non-exhaustive match expressions have been
4921 Version 0.10 (2014-04-03)
4922 =========================
4924 * ~1500 changes, numerous bugfixes
4927 * A new RFC process is now in place for modifying the language.
4928 * Patterns with `@`-pointers have been removed from the language.
4929 * Patterns with unique vectors (`~[T]`) have been removed from the
4931 * Patterns with unique strings (`~str`) have been removed from the
4933 * `@str` has been removed from the language.
4934 * `@[T]` has been removed from the language.
4935 * `@self` has been removed from the language.
4936 * `@Trait` has been removed from the language.
4937 * Headers on `~` allocations which contain `@` boxes inside the type for
4938 reference counting have been removed.
4939 * The semantics around the lifetimes of temporary expressions have changed,
4940 see #3511 and #11585 for more information.
4941 * Cross-crate syntax extensions are now possible, but feature gated. See
4942 #11151 for more information. This includes both `macro_rules!` macros as
4943 well as syntax extensions such as `format!`.
4944 * New lint modes have been added, and older ones have been turned on to be
4946 * Unnecessary parentheses
4949 * Uppercase variables
4950 * Publicly visible private types
4951 * `#[deriving]` with raw pointers
4952 * Unsafe functions can no longer be coerced to closures.
4953 * Various obscure macros such as `log_syntax!` are now behind feature gates.
4954 * The `#[simd]` attribute is now behind a feature gate.
4955 * Visibility is no longer allowed on `extern crate` statements, and
4956 unnecessary visibility (`priv`) is no longer allowed on `use` statements.
4957 * Trailing commas are now allowed in argument lists and tuple patterns.
4958 * The `do` keyword has been removed, it is now a reserved keyword.
4959 * Default type parameters have been implemented, but are feature gated.
4960 * Borrowed variables through captures in closures are now considered soundly.
4961 * `extern mod` is now `extern crate`
4962 * The `Freeze` trait has been removed.
4963 * The `Share` trait has been added for types that can be shared among
4965 * Labels in macros are now hygienic.
4966 * Expression/statement macro invocations can be delimited with `{}` now.
4967 * Treatment of types allowed in `static mut` locations has been tweaked.
4968 * The `*` and `.` operators are now overloadable through the `Deref` and
4970 * `~Trait` and `proc` no longer have `Send` bounds by default.
4971 * Partial type hints are now supported with the `_` type marker.
4972 * An `Unsafe` type was introduced for interior mutability. It is now
4973 considered undefined to transmute from `&T` to `&mut T` without using the
4975 * The #[linkage] attribute was implemented for extern statics/functions.
4976 * The inner attribute syntax has changed from `#[foo];` to `#![foo]`.
4977 * `Pod` was renamed to `Copy`.
4980 * The `libextra` library has been removed. It has now been decomposed into
4981 component libraries with smaller and more focused nuggets of
4982 functionality. The full list of libraries can be found on the
4983 documentation index page.
4984 * std: `std::condition` has been removed. All I/O errors are now propagated
4985 through the `Result` type. In order to assist with error handling, a
4986 `try!` macro for unwrapping errors with an early return and a lint for
4987 unused results has been added. See #12039 for more information.
4988 * std: The `vec` module has been renamed to `slice`.
4989 * std: A new vector type, `Vec<T>`, has been added in preparation for DST.
4990 This will become the only growable vector in the future.
4991 * std: `std::io` now has more public-reexports. Types such as `BufferedReader`
4992 are now found at `std::io::BufferedReader` instead of
4993 `std::io::buffered::BufferedReader`.
4994 * std: `print` and `println` are no longer in the prelude, the `print!` and
4995 `println!` macros are intended to be used instead.
4996 * std: `Rc` now has a `Weak` pointer for breaking cycles, and it no longer
4997 attempts to statically prevent cycles.
4998 * std: The standard distribution is adopting the policy of pushing failure
4999 to the user rather than failing in libraries. Many functions (such as
5000 `slice::last()`) now return `Option<T>` instead of `T` + failing.
5001 * std: `fmt::Default` has been renamed to `fmt::Show`, and it now has a new
5002 deriving mode: `#[deriving(Show)]`.
5003 * std: `ToStr` is now implemented for all types implementing `Show`.
5004 * std: The formatting trait methods now take `&self` instead of `&T`
5005 * std: The `invert()` method on iterators has been renamed to `rev()`
5006 * std: `std::num` has seen a reduction in the genericity of its traits,
5007 consolidating functionality into a few core traits.
5008 * std: Backtraces are now printed on task failure if the environment
5009 variable `RUST_BACKTRACE` is present.
5010 * std: Naming conventions for iterators have been standardized. More details
5011 can be found on the wiki's style guide.
5012 * std: `eof()` has been removed from the `Reader` trait. Specific types may
5013 still implement the function.
5014 * std: Networking types are now cloneable to allow simultaneous reads/writes.
5015 * std: `assert_approx_eq!` has been removed
5016 * std: The `e` and `E` formatting specifiers for floats have been added to
5017 print them in exponential notation.
5018 * std: The `Times` trait has been removed
5019 * std: Indications of variance and opting out of builtin bounds is done
5020 through marker types in `std::kinds::marker` now
5021 * std: `hash` has been rewritten, `IterBytes` has been removed, and
5022 `#[deriving(Hash)]` is now possible.
5023 * std: `SharedChan` has been removed, `Sender` is now cloneable.
5024 * std: `Chan` and `Port` were renamed to `Sender` and `Receiver`.
5025 * std: `Chan::new` is now `channel()`.
5026 * std: A new synchronous channel type has been implemented.
5027 * std: A `select!` macro is now provided for selecting over `Receiver`s.
5028 * std: `hashmap` and `trie` have been moved to `libcollections`
5029 * std: `run` has been rolled into `io::process`
5030 * std: `assert_eq!` now uses `{}` instead of `{:?}`
5031 * std: The equality and comparison traits have seen some reorganization.
5032 * std: `rand` has moved to `librand`.
5033 * std: `to_{lower,upper}case` has been implemented for `char`.
5034 * std: Logging has been moved to `liblog`.
5035 * collections: `HashMap` has been rewritten for higher performance and less
5037 * native: The default runtime is now `libnative`. If `libgreen` is desired,
5038 it can be booted manually. The runtime guide has more information and
5040 * native: All I/O functionality except signals has been implemented.
5041 * green: Task spawning with `libgreen` has been optimized with stack caching
5042 and various trimming of code.
5043 * green: Tasks spawned by `libgreen` now have an unmapped guard page.
5044 * sync: The `extra::sync` module has been updated to modern rust (and moved
5045 to the `sync` library), tweaking and improving various interfaces while
5046 dropping redundant functionality.
5047 * sync: A new `Barrier` type has been added to the `sync` library.
5048 * sync: An efficient mutex for native and green tasks has been implemented.
5049 * serialize: The `base64` module has seen some improvement. It treats
5050 newlines better, has non-string error values, and has seen general
5052 * fourcc: A `fourcc!` macro was introduced
5053 * hexfloat: A `hexfloat!` macro was implemented for specifying floats via a
5054 hexadecimal literal.
5057 * `rustpkg` has been deprecated and removed from the main repository. Its
5058 replacement, `cargo`, is under development.
5059 * Nightly builds of rust are now available
5060 * The memory usage of rustc has been improved many times throughout this
5062 * The build process supports disabling rpath support for the rustc binary
5064 * Code generation has improved in some cases, giving more information to the
5065 LLVM optimization passes to enable more extensive optimizations.
5066 * Debuginfo compatibility with lldb on OSX has been restored.
5067 * The master branch is now gated on an android bot, making building for
5068 android much more reliable.
5069 * Output flags have been centralized into one `--emit` flag.
5070 * Crate type flags have been centralized into one `--crate-type` flag.
5071 * Codegen flags have been consolidated behind a `-C` flag.
5072 * Linking against outdated crates now has improved error messages.
5073 * Error messages with lifetimes will often suggest how to annotate the
5074 function to fix the error.
5075 * Many more types are documented in the standard library, and new guides
5077 * Many `rustdoc` improvements:
5078 * code blocks are syntax highlighted.
5079 * render standalone markdown files.
5080 * the --test flag tests all code blocks by default.
5081 * exported macros are displayed.
5082 * reexported types have their documentation inlined at the location of the
5084 * search works across crates that have been rendered to the same output
5088 Version 0.9 (2014-01-09)
5089 ==========================
5091 * ~1800 changes, numerous bugfixes
5094 * The `float` type has been removed. Use `f32` or `f64` instead.
5095 * A new facility for enabling experimental features (feature gating) has
5096 been added, using the crate-level `#[feature(foo)]` attribute.
5097 * Managed boxes (@) are now behind a feature gate
5098 (`#[feature(managed_boxes)]`) in preparation for future removal. Use the
5099 standard library's `Gc` or `Rc` types instead.
5100 * `@mut` has been removed. Use `std::cell::{Cell, RefCell}` instead.
5101 * Jumping back to the top of a loop is now done with `continue` instead of
5103 * Strings can no longer be mutated through index assignment.
5104 * Raw strings can be created via the basic `r"foo"` syntax or with matched
5105 hash delimiters, as in `r###"foo"###`.
5106 * `~fn` is now written `proc (args) -> retval { ... }` and may only be
5108 * The `&fn` type is now written `|args| -> ret` to match the literal form.
5109 * `@fn`s have been removed.
5110 * `do` only works with procs in order to make it obvious what the cost
5112 * Single-element tuple-like structs can no longer be dereferenced to
5113 obtain the inner value. A more comprehensive solution for overloading
5114 the dereference operator will be provided in the future.
5115 * The `#[link(...)]` attribute has been replaced with
5116 `#[crate_id = "name#vers"]`.
5117 * Empty `impl`s must be terminated with empty braces and may not be
5118 terminated with a semicolon.
5119 * Keywords are no longer allowed as lifetime names; the `self` lifetime
5120 no longer has any special meaning.
5121 * The old `fmt!` string formatting macro has been removed.
5122 * `printf!` and `printfln!` (old-style formatting) removed in favor of
5123 `print!` and `println!`.
5124 * `mut` works in patterns now, as in `let (mut x, y) = (1, 2);`.
5125 * The `extern mod foo (name = "bar")` syntax has been removed. Use
5126 `extern mod foo = "bar"` instead.
5127 * New reserved keywords: `alignof`, `offsetof`, `sizeof`.
5128 * Macros can have attributes.
5129 * Macros can expand to items with attributes.
5130 * Macros can expand to multiple items.
5131 * The `asm!` macro is feature-gated (`#[feature(asm)]`).
5132 * Comments may be nested.
5133 * Values automatically coerce to trait objects they implement, without
5135 * Enum discriminants are no longer an entire word but as small as needed to
5136 contain all the variants. The `repr` attribute can be used to override
5137 the discriminant size, as in `#[repr(int)]` for integer-sized, and
5138 `#[repr(C)]` to match C enums.
5139 * Non-string literals are not allowed in attributes (they never worked).
5140 * The FFI now supports variadic functions.
5141 * Octal numeric literals, as in `0o7777`.
5142 * The `concat!` syntax extension performs compile-time string concatenation.
5143 * The `#[fixed_stack_segment]` and `#[rust_stack]` attributes have been
5144 removed as Rust no longer uses segmented stacks.
5145 * Non-ascii identifiers are feature-gated (`#[feature(non_ascii_idents)]`).
5146 * Ignoring all fields of an enum variant or tuple-struct is done with `..`,
5147 not `*`; ignoring remaining fields of a struct is also done with `..`,
5148 not `_`; ignoring a slice of a vector is done with `..`, not `.._`.
5149 * `rustc` supports the "win64" calling convention via `extern "win64"`.
5150 * `rustc` supports the "system" calling convention, which defaults to the
5151 preferred convention for the target platform, "stdcall" on 32-bit Windows,
5153 * The `type_overflow` lint (default: warn) checks literals for overflow.
5154 * The `unsafe_block` lint (default: allow) checks for usage of `unsafe`.
5155 * The `attribute_usage` lint (default: warn) warns about unknown
5157 * The `unknown_features` lint (default: warn) warns about unknown
5159 * The `dead_code` lint (default: warn) checks for dead code.
5160 * Rust libraries can be linked statically to one another
5161 * `#[link_args]` is behind the `link_args` feature gate.
5162 * Native libraries are now linked with `#[link(name = "foo")]`
5163 * Native libraries can be statically linked to a rust crate
5164 (`#[link(name = "foo", kind = "static")]`).
5165 * Native OS X frameworks are now officially supported
5166 (`#[link(name = "foo", kind = "framework")]`).
5167 * The `#[thread_local]` attribute creates thread-local (not task-local)
5168 variables. Currently behind the `thread_local` feature gate.
5169 * The `return` keyword may be used in closures.
5170 * Types that can be copied via a memcpy implement the `Pod` kind.
5171 * The `cfg` attribute can now be used on struct fields and enum variants.
5174 * std: The `option` and `result` API's have been overhauled to make them
5175 simpler, more consistent, and more composable.
5176 * std: The entire `std::io` module has been replaced with one that is
5177 more comprehensive and that properly interfaces with the underlying
5178 scheduler. File, TCP, UDP, Unix sockets, pipes, and timers are all
5180 * std: `io::util` contains a number of useful implementations of
5181 `Reader` and `Writer`, including `NullReader`, `NullWriter`,
5182 `ZeroReader`, `TeeReader`.
5183 * std: The reference counted pointer type `extra::rc` moved into std.
5184 * std: The `Gc` type in the `gc` module will replace `@` (it is currently
5185 just a wrapper around it).
5186 * std: The `Either` type has been removed.
5187 * std: `fmt::Default` can be implemented for any type to provide default
5188 formatting to the `format!` macro, as in `format!("{}", myfoo)`.
5189 * std: The `rand` API continues to be tweaked.
5190 * std: The `rust_begin_unwind` function, useful for inserting breakpoints
5191 on failure in gdb, is now named `rust_fail`.
5192 * std: The `each_key` and `each_value` methods on `HashMap` have been
5193 replaced by the `keys` and `values` iterators.
5194 * std: Functions dealing with type size and alignment have moved from the
5195 `sys` module to the `mem` module.
5196 * std: The `path` module was written and API changed.
5197 * std: `str::from_utf8` has been changed to cast instead of allocate.
5198 * std: `starts_with` and `ends_with` methods added to vectors via the
5199 `ImmutableEqVector` trait, which is in the prelude.
5200 * std: Vectors can be indexed with the `get_opt` method, which returns `None`
5201 if the index is out of bounds.
5202 * std: Task failure no longer propagates between tasks, as the model was
5203 complex, expensive, and incompatible with thread-based tasks.
5204 * std: The `Any` type can be used for dynamic typing.
5205 * std: `~Any` can be passed to the `fail!` macro and retrieved via
5207 * std: Methods that produce iterators generally do not have an `_iter`
5209 * std: `cell::Cell` and `cell::RefCell` can be used to introduce mutability
5210 roots (mutable fields, etc.). Use instead of e.g. `@mut`.
5211 * std: `util::ignore` renamed to `prelude::drop`.
5212 * std: Slices have `sort` and `sort_by` methods via the `MutableVector`
5214 * std: `vec::raw` has seen a lot of cleanup and API changes.
5215 * std: The standard library no longer includes any C++ code, and very
5216 minimal C, eliminating the dependency on libstdc++.
5217 * std: Runtime scheduling and I/O functionality has been factored out into
5218 extensible interfaces and is now implemented by two different crates:
5219 libnative, for native threading and I/O; and libgreen, for green threading
5220 and I/O. This paves the way for using the standard library in more limited
5221 embedded environments.
5222 * std: The `comm` module has been rewritten to be much faster, have a
5223 simpler, more consistent API, and to work for both native and green
5225 * std: All libuv dependencies have been moved into the rustuv crate.
5226 * native: New implementations of runtime scheduling on top of OS threads.
5227 * native: New native implementations of TCP, UDP, file I/O, process spawning,
5229 * green: The green thread scheduler and message passing types are almost
5231 * extra: The `flatpipes` module had bitrotted and was removed.
5232 * extra: All crypto functions have been removed and Rust now has a policy of
5233 not reimplementing crypto in the standard library. In the future crypto
5234 will be provided by external crates with bindings to established libraries.
5235 * extra: `c_vec` has been modernized.
5236 * extra: The `sort` module has been removed. Use the `sort` method on
5240 * The `rust` and `rusti` commands have been removed, due to lack of
5242 * `rustdoc` was completely rewritten.
5243 * `rustdoc` can test code examples in documentation.
5244 * `rustpkg` can test packages with the argument, 'test'.
5245 * `rustpkg` supports arbitrary dependencies, including C libraries.
5246 * `rustc`'s support for generating debug info is improved again.
5247 * `rustc` has better error reporting for unbalanced delimiters.
5248 * `rustc`'s JIT support was removed due to bitrot.
5249 * Executables and static libraries can be built with LTO (-Z lto)
5250 * `rustc` adds a `--dep-info` flag for communicating dependencies to
5254 Version 0.8 (2013-09-26)
5255 ============================
5257 * ~2200 changes, numerous bugfixes
5260 * The `for` loop syntax has changed to work with the `Iterator` trait.
5261 * At long last, unwinding works on Windows.
5262 * Default methods are ready for use.
5263 * Many trait inheritance bugs fixed.
5264 * Owned and borrowed trait objects work more reliably.
5265 * `copy` is no longer a keyword. It has been replaced by the `Clone` trait.
5266 * rustc can omit emission of code for the `debug!` macro if it is passed
5268 * mod.rs is now "blessed". When loading `mod foo;`, rustc will now look
5269 for foo.rs, then foo/mod.rs, and will generate an error when both are
5271 * Strings no longer contain trailing nulls. The new `std::c_str` module
5272 provides new mechanisms for converting to C strings.
5273 * The type of foreign functions is now `extern "C" fn` instead of `*u8'.
5274 * The FFI has been overhauled such that foreign functions are called directly,
5275 instead of through a stack-switching wrapper.
5276 * Calling a foreign function must be done through a Rust function with the
5277 `#[fixed_stack_segment]` attribute.
5278 * The `externfn!` macro can be used to declare both a foreign function and
5279 a `#[fixed_stack_segment]` wrapper at once.
5280 * `pub` and `priv` modifiers on `extern` blocks are no longer parsed.
5281 * `unsafe` is no longer allowed on extern fns - they are all unsafe.
5282 * `priv` is disallowed everywhere except for struct fields and enum variants.
5283 * `&T` (besides `&'static T`) is no longer allowed in `@T`.
5284 * `ref` bindings in irrefutable patterns work correctly now.
5285 * `char` is now prevented from containing invalid code points.
5286 * Casting to `bool` is no longer allowed.
5287 * `\0` is now accepted as an escape in chars and strings.
5288 * `yield` is a reserved keyword.
5289 * `typeof` is a reserved keyword.
5290 * Crates may be imported by URL with `extern mod foo = "url";`.
5291 * Explicit enum discriminants may be given as uints as in `enum E { V = 0u }`
5292 * Static vectors can be initialized with repeating elements,
5293 e.g. `static foo: [u8, .. 100]: [0, .. 100];`.
5294 * Static structs can be initialized with functional record update,
5295 e.g. `static foo: Foo = Foo { a: 5, .. bar };`.
5296 * `cfg!` can be used to conditionally execute code based on the crate
5297 configuration, similarly to `#[cfg(...)]`.
5298 * The `unnecessary_qualification` lint detects unneeded module
5299 prefixes (default: allow).
5300 * Arithmetic operations have been implemented on the SIMD types in
5301 `std::unstable::simd`.
5302 * Exchange allocation headers were removed, reducing memory usage.
5303 * `format!` implements a completely new, extensible, and higher-performance
5304 string formatting system. It will replace `fmt!`.
5305 * `print!` and `println!` write formatted strings (using the `format!`
5306 extension) to stdout.
5307 * `write!` and `writeln!` write formatted strings (using the `format!`
5308 extension) to the new Writers in `std::rt::io`.
5309 * The library section in which a function or static is placed may
5310 be specified with `#[link_section = "..."]`.
5311 * The `proto!` syntax extension for defining bounded message protocols
5313 * `macro_rules!` is hygienic for `let` declarations.
5314 * The `#[export_name]` attribute specifies the name of a symbol.
5315 * `unreachable!` can be used to indicate unreachable code, and fails
5319 * std: Transitioned to the new runtime, written in Rust.
5320 * std: Added an experimental I/O library, `rt::io`, based on the new
5322 * std: A new generic `range` function was added to the prelude, replacing
5323 `uint::range` and friends.
5324 * std: `range_rev` no longer exists. Since range is an iterator it can be
5325 reversed with `range(lo, hi).invert()`.
5326 * std: The `chain` method on option renamed to `and_then`; `unwrap_or_default`
5327 renamed to `unwrap_or`.
5328 * std: The `iterator` module was renamed to `iter`.
5329 * std: Integral types now support the `checked_add`, `checked_sub`, and
5330 `checked_mul` operations for detecting overflow.
5331 * std: Many methods in `str`, `vec`, `option, `result` were renamed for
5333 * std: Methods are standardizing on conventions for casting methods:
5334 `to_foo` for copying, `into_foo` for moving, `as_foo` for temporary
5336 * std: The `CString` type in `c_str` provides new ways to convert to and
5338 * std: `DoubleEndedIterator` can yield elements in two directions.
5339 * std: The `mut_split` method on vectors partitions an `&mut [T]` into
5341 * std: `str::from_bytes` renamed to `str::from_utf8`.
5342 * std: `pop_opt` and `shift_opt` methods added to vectors.
5343 * std: The task-local data interface no longer uses @, and keys are
5344 no longer function pointers.
5345 * std: The `swap_unwrap` method of `Option` renamed to `take_unwrap`.
5346 * std: Added `SharedPort` to `comm`.
5347 * std: `Eq` has a default method for `ne`; only `eq` is required
5349 * std: `Ord` has default methods for `le`, `gt` and `ge`; only `lt`
5350 is required in implementations.
5351 * std: `is_utf8` performance is improved, impacting many string functions.
5352 * std: `os::MemoryMap` provides cross-platform mmap.
5353 * std: `ptr::offset` is now unsafe, but also more optimized. Offsets that
5354 are not 'in-bounds' are considered undefined.
5355 * std: Many freestanding functions in `vec` removed in favor of methods.
5356 * std: Many freestanding functions on scalar types removed in favor of
5358 * std: Many options to task builders were removed since they don't make
5359 sense in the new scheduler design.
5360 * std: More containers implement `FromIterator` so can be created by the
5362 * std: More complete atomic types in `unstable::atomics`.
5363 * std: `comm::PortSet` removed.
5364 * std: Mutating methods in the `Set` and `Map` traits have been moved into
5365 the `MutableSet` and `MutableMap` traits. `Container::is_empty`,
5366 `Map::contains_key`, `MutableMap::insert`, and `MutableMap::remove` have
5367 default implementations.
5368 * std: Various `from_str` functions were removed in favor of a generic
5369 `from_str` which is available in the prelude.
5370 * std: `util::unreachable` removed in favor of the `unreachable!` macro.
5371 * extra: `dlist`, the doubly-linked list was modernized.
5372 * extra: Added a `hex` module with `ToHex` and `FromHex` traits.
5373 * extra: Added `glob` module, replacing `std::os::glob`.
5374 * extra: `rope` was removed.
5375 * extra: `deque` was renamed to `ringbuf`. `RingBuf` implements `Deque`.
5376 * extra: `net`, and `timer` were removed. The experimental replacements
5377 are `std::rt::io::net` and `std::rt::io::timer`.
5378 * extra: Iterators implemented for `SmallIntMap`.
5379 * extra: Iterators implemented for `Bitv` and `BitvSet`.
5380 * extra: `SmallIntSet` removed. Use `BitvSet`.
5381 * extra: Performance of JSON parsing greatly improved.
5382 * extra: `semver` updated to SemVer 2.0.0.
5383 * extra: `term` handles more terminals correctly.
5384 * extra: `dbg` module removed.
5385 * extra: `par` module removed.
5386 * extra: `future` was cleaned up, with some method renames.
5387 * extra: Most free functions in `getopts` were converted to methods.
5390 * rustc's debug info generation (`-Z debug-info`) is greatly improved.
5391 * rustc accepts `--target-cpu` to compile to a specific CPU architecture,
5392 similarly to gcc's `--march` flag.
5393 * rustc's performance compiling small crates is much better.
5394 * rustpkg has received many improvements.
5395 * rustpkg supports git tags as package IDs.
5396 * rustpkg builds into target-specific directories so it can be used for
5398 * The number of concurrent test tasks is controlled by the environment
5399 variable RUST_TEST_TASKS.
5400 * The test harness can now report metrics for benchmarks.
5401 * All tools have man pages.
5402 * Programs compiled with `--test` now support the `-h` and `--help` flags.
5403 * The runtime uses jemalloc for allocations.
5404 * Segmented stacks are temporarily disabled as part of the transition to
5405 the new runtime. Stack overflows are possible!
5406 * A new documentation backend, rustdoc_ng, is available for use. It is
5407 still invoked through the normal `rustdoc` command.
5410 Version 0.7 (2013-07-03)
5411 =======================
5413 * ~2000 changes, numerous bugfixes
5416 * `impl`s no longer accept a visibility qualifier. Put them on methods
5418 * The borrow checker has been rewritten with flow-sensitivity, fixing
5419 many bugs and inconveniences.
5420 * The `self` parameter no longer implicitly means `&'self self`,
5421 and can be explicitly marked with a lifetime.
5422 * Overloadable compound operators (`+=`, etc.) have been temporarily
5423 removed due to bugs.
5424 * The `for` loop protocol now requires `for`-iterators to return `bool`
5425 so they compose better.
5426 * The `Durable` trait is replaced with the `'static` bounds.
5427 * Trait default methods work more often.
5428 * Structs with the `#[packed]` attribute have byte alignment and
5429 no padding between fields.
5430 * Type parameters bound by `Copy` must now be copied explicitly with
5432 * It is now illegal to move out of a dereferenced unsafe pointer.
5433 * `Option<~T>` is now represented as a nullable pointer.
5434 * `@mut` does dynamic borrow checks correctly.
5435 * The `main` function is only detected at the topmost level of the crate.
5436 The `#[main]` attribute is still valid anywhere.
5437 * Struct fields may no longer be mutable. Use inherited mutability.
5438 * The `#[no_send]` attribute makes a type that would otherwise be
5440 * The `#[no_freeze]` attribute makes a type that would otherwise be
5442 * Unbounded recursion will abort the process after reaching the limit
5443 specified by the `RUST_MAX_STACK` environment variable (default: 1GB).
5444 * The `vecs_implicitly_copyable` lint mode has been removed. Vectors
5445 are never implicitly copyable.
5446 * `#[static_assert]` makes compile-time assertions about static bools.
5447 * At long last, 'argument modes' no longer exist.
5448 * The rarely used `use mod` statement no longer exists.
5451 * `fail!` and `assert!` accept `~str`, `&'static str` or `fmt!`-style
5453 * `Encodable`, `Decodable`, `Ord`, `TotalOrd`, `TotalEq`, `DeepClone`,
5454 `Rand`, `Zero` and `ToStr` can all be automatically derived with
5456 * The `bytes!` macro returns a vector of bytes for string, u8, char,
5457 and unsuffixed integer literals.
5460 * The `core` crate was renamed to `std`.
5461 * The `std` crate was renamed to `extra`.
5462 * More and improved documentation.
5463 * std: `iterator` module for external iterator objects.
5464 * Many old-style (internal, higher-order function) iterators replaced by
5465 implementations of `Iterator`.
5466 * std: Many old internal vector and string iterators,
5467 incl. `any`, `all`. removed.
5468 * std: The `finalize` method of `Drop` renamed to `drop`.
5469 * std: The `drop` method now takes `&mut self` instead of `&self`.
5470 * std: The prelude no longer reexports any modules, only types and traits.
5471 * std: Prelude additions: `print`, `println`, `FromStr`, `ApproxEq`, `Equiv`,
5472 `Iterator`, `IteratorUtil`, many numeric traits, many tuple traits.
5473 * std: New numeric traits: `Fractional`, `Real`, `RealExt`, `Integer`, `Ratio`,
5474 `Algebraic`, `Trigonometric`, `Exponential`, `Primitive`.
5475 * std: Tuple traits and accessors defined for up to 12-tuples, e.g.
5476 `(0, 1, 2).n2()` or `(0, 1, 2).n2_ref()`.
5477 * std: Many types implement `Clone`.
5478 * std: `path` type renamed to `Path`.
5479 * std: `mut` module and `Mut` type removed.
5480 * std: Many standalone functions removed in favor of methods and iterators
5481 in `vec`, `str`. In the future methods will also work as functions.
5482 * std: `reinterpret_cast` removed. Use `transmute`.
5483 * std: ascii string handling in `std::ascii`.
5484 * std: `Rand` is implemented for ~/@.
5485 * std: `run` module for spawning processes overhauled.
5486 * std: Various atomic types added to `unstable::atomic`.
5487 * std: Various types implement `Zero`.
5488 * std: `LinearMap` and `LinearSet` renamed to `HashMap` and `HashSet`.
5489 * std: Borrowed pointer functions moved from `ptr` to `borrow`.
5490 * std: Added `os::mkdir_recursive`.
5491 * std: Added `os::glob` function performs filesystems globs.
5492 * std: `FuzzyEq` renamed to `ApproxEq`.
5493 * std: `Map` now defines `pop` and `swap` methods.
5494 * std: `Cell` constructors converted to static methods.
5495 * extra: `rc` module adds the reference counted pointers, `Rc` and `RcMut`.
5496 * extra: `flate` module moved from `std` to `extra`.
5497 * extra: `fileinput` module for iterating over a series of files.
5498 * extra: `Complex` number type and `complex` module.
5499 * extra: `Rational` number type and `rational` module.
5500 * extra: `BigInt`, `BigUint` implement numeric and comparison traits.
5501 * extra: `term` uses terminfo now, is more correct.
5502 * extra: `arc` functions converted to methods.
5503 * extra: Implementation of fixed output size variations of SHA-2.
5506 * `unused_variable` lint mode for unused variables (default: warn).
5507 * `unused_unsafe` lint mode for detecting unnecessary `unsafe` blocks
5509 * `unused_mut` lint mode for identifying unused `mut` qualifiers
5511 * `dead_assignment` lint mode for unread variables (default: warn).
5512 * `unnecessary_allocation` lint mode detects some heap allocations that are
5513 immediately borrowed so could be written without allocating (default: warn).
5514 * `missing_doc` lint mode (default: allow).
5515 * `unreachable_code` lint mode (default: warn).
5516 * The `rusti` command has been rewritten and a number of bugs addressed.
5517 * rustc outputs in color on more terminals.
5518 * rustc accepts a `--link-args` flag to pass arguments to the linker.
5519 * rustc accepts a `-Z print-link-args` flag for debugging linkage.
5520 * Compiling with `-g` will make the binary record information about
5521 dynamic borrowcheck failures for debugging.
5522 * rustdoc has a nicer stylesheet.
5523 * Various improvements to rustdoc.
5524 * Improvements to rustpkg (see the detailed release notes).
5527 Version 0.6 (2013-04-03)
5528 ========================
5530 * ~2100 changes, numerous bugfixes
5533 * The self type parameter in traits is now spelled `Self`
5534 * The `self` parameter in trait and impl methods must now be explicitly
5535 named (for example: `fn f(&self) { }`). Implicit self is deprecated.
5536 * Static methods no longer require the `static` keyword and instead
5537 are distinguished by the lack of a `self` parameter
5538 * Replaced the `Durable` trait with the `'static` lifetime
5539 * The old closure type syntax with the trailing sigil has been
5540 removed in favor of the more consistent leading sigil
5541 * `super` is a keyword, and may be prefixed to paths
5542 * Trait bounds are separated with `+` instead of whitespace
5543 * Traits are implemented with `impl Trait for Type`
5544 instead of `impl Type: Trait`
5545 * Lifetime syntax is now `&'l foo` instead of `&l/foo`
5546 * The `export` keyword has finally been removed
5547 * The `move` keyword has been removed (see "Semantic changes")
5548 * The interior mutability qualifier on vectors, `[mut T]`, has been
5549 removed. Use `&mut [T]`, etc.
5550 * `mut` is no longer valid in `~mut T`. Use inherited mutability
5551 * `fail` is no longer a keyword. Use `fail!()`
5552 * `assert` is no longer a keyword. Use `assert!()`
5553 * `log` is no longer a keyword. use `debug!`, etc.
5554 * 1-tuples may be represented as `(T,)`
5555 * Struct fields may no longer be `mut`. Use inherited mutability,
5556 `@mut T`, `core::mut` or `core::cell`
5557 * `extern mod { ... }` is no longer valid syntax for foreign
5558 function modules. Use extern blocks: `extern { ... }`
5559 * Newtype enums removed. Use tuple-structs.
5560 * Trait implementations no longer support visibility modifiers
5561 * Pattern matching over vectors improved and expanded
5562 * `const` renamed to `static` to correspond to lifetime name,
5563 and make room for future `static mut` unsafe mutable globals.
5564 * Replaced `#[deriving_eq]` with `#[deriving(Eq)]`, etc.
5565 * `Clone` implementations can be automatically generated with
5566 `#[deriving(Clone)]`
5567 * Casts to traits must use a pointer sigil, e.g. `@foo as @Bar`
5568 instead of `foo as Bar`.
5569 * Fixed length vector types are now written as `[int, .. 3]`
5570 instead of `[int * 3]`.
5571 * Fixed length vector types can express the length as a constant
5572 expression. (ex: `[int, .. GL_BUFFER_SIZE - 2]`)
5575 * Types with owned pointers or custom destructors move by default,
5576 eliminating the `move` keyword
5577 * All foreign functions are considered unsafe
5578 * &mut is now unaliasable
5579 * Writes to borrowed @mut pointers are prevented dynamically
5581 * The name of the main function can be customized using #[main]
5582 * The default type of an inferred closure is &fn instead of @fn
5583 * `use` statements may no longer be "chained" - they cannot import
5584 identifiers imported by previous `use` statements
5585 * `use` statements are crate relative, importing from the "top"
5586 of the crate by default. Paths may be prefixed with `super::`
5587 or `self::` to change the search behavior.
5588 * Method visibility is inherited from the implementation declaration
5589 * Structural records have been removed
5590 * Many more types can be used in static items, including enums
5591 'static-lifetime pointers and vectors
5592 * Pattern matching over vectors improved and expanded
5593 * Typechecking of closure types has been overhauled to
5594 improve inference and eliminate unsoundness
5595 * Macros leave scope at the end of modules, unless that module is
5596 tagged with #[macro_escape]
5599 * Added big integers to `std::bigint`
5600 * Removed `core::oldcomm` module
5601 * Added pipe-based `core::comm` module
5602 * Numeric traits have been reorganized under `core::num`
5603 * `vec::slice` finally returns a slice
5604 * `debug!` and friends don't require a format string, e.g. `debug!(Foo)`
5605 * Containers reorganized around traits in `core::container`
5606 * `core::dvec` removed, `~[T]` is a drop-in replacement
5607 * `core::send_map` renamed to `core::hashmap`
5608 * `std::map` removed; replaced with `core::hashmap`
5609 * `std::treemap` reimplemented as an owned balanced tree
5610 * `std::deque` and `std::smallintmap` reimplemented as owned containers
5611 * `core::trie` added as a fast ordered map for integer keys
5612 * Set types added to `core::hashmap`, `core::trie` and `std::treemap`
5613 * `Ord` split into `Ord` and `TotalOrd`. `Ord` is still used to
5614 overload the comparison operators, whereas `TotalOrd` is used
5615 by certain container types
5618 * Replaced the 'cargo' package manager with 'rustpkg'
5619 * Added all-purpose 'rust' tool
5620 * `rustc --test` now supports benchmarks with the `#[bench]` attribute
5621 * rustc now *attempts* to offer spelling suggestions
5622 * Improved support for ARM and Android
5623 * Preliminary MIPS backend
5624 * Improved foreign function ABI implementation for x86, x86_64
5625 * Various memory usage improvements
5626 * Rust code may be embedded in foreign code under limited circumstances
5627 * Inline assembler supported by new asm!() syntax extension.
5630 Version 0.5 (2012-12-21)
5631 ===========================
5633 * ~900 changes, numerous bugfixes
5636 * Removed `<-` move operator
5637 * Completed the transition from the `#fmt` extension syntax to `fmt!`
5638 * Removed old fixed length vector syntax - `[T]/N`
5639 * New token-based quasi-quoters, `quote_tokens!`, `quote_expr!`, etc.
5640 * Macros may now expand to items and statements
5641 * `a.b()` is always parsed as a method call, never as a field projection
5642 * `Eq` and `IterBytes` implementations can be automatically generated
5643 with `#[deriving_eq]` and `#[deriving_iter_bytes]` respectively
5644 * Removed the special crate language for `.rc` files
5645 * Function arguments may consist of any irrefutable pattern
5648 * `&` and `~` pointers may point to objects
5649 * Tuple structs - `struct Foo(Bar, Baz)`. Will replace newtype enums.
5650 * Enum variants may be structs
5651 * Destructors can be added to all nominal types with the Drop trait
5652 * Structs and nullary enum variants may be constants
5653 * Values that cannot be implicitly copied are now automatically moved
5654 without writing `move` explicitly
5655 * `&T` may now be coerced to `*T`
5656 * Coercions happen in `let` statements as well as function calls
5657 * `use` statements now take crate-relative paths
5658 * The module and type namespaces have been merged so that static
5659 method names can be resolved under the trait in which they are
5662 * Improved support for language features
5663 * Trait inheritance works in many scenarios
5664 * More support for explicit self arguments in methods - `self`, `&self`
5665 `@self`, and `~self` all generally work as expected
5666 * Static methods work in more situations
5667 * Experimental: Traits may declare default methods for the implementations
5671 * New condition handling system in `core::condition`
5672 * Timsort added to `std::sort`
5673 * New priority queue, `std::priority_queue`
5674 * Pipes for serializable types, `std::flatpipes'
5675 * Serialization overhauled to be trait-based
5676 * Expanded `getopts` definitions
5677 * Moved futures to `std`
5678 * More functions are pure now
5679 * `core::comm` renamed to `oldcomm`. Still deprecated
5680 * `rustdoc` and `cargo` are libraries now
5683 * Added a preliminary REPL, `rusti`
5684 * License changed from MIT to dual MIT/APL2
5687 Version 0.4 (2012-10-15)
5688 ==========================
5690 * ~2000 changes, numerous bugfixes
5693 * All keywords are now strict and may not be used as identifiers anywhere
5694 * Keyword removal: 'again', 'import', 'check', 'new', 'owned', 'send',
5695 'of', 'with', 'to', 'class'.
5696 * Classes are replaced with simpler structs
5697 * Explicit method self types
5698 * `ret` became `return` and `alt` became `match`
5699 * `import` is now `use`; `use is now `extern mod`
5700 * `extern mod { ... }` is now `extern { ... }`
5701 * `use mod` is the recommended way to import modules
5702 * `pub` and `priv` replace deprecated export lists
5703 * The syntax of `match` pattern arms now uses fat arrow (=>)
5704 * `main` no longer accepts an args vector; use `os::args` instead
5707 * Trait implementations are now coherent, ala Haskell typeclasses
5708 * Trait methods may be static
5709 * Argument modes are deprecated
5710 * Borrowed pointers are much more mature and recommended for use
5711 * Strings and vectors in the static region are stored in constant memory
5712 * Typestate was removed
5713 * Resolution rewritten to be more reliable
5714 * Support for 'dual-mode' data structures (freezing and thawing)
5717 * Most binary operators can now be overloaded via the traits in
5719 * `std::net::url` for representing URLs
5720 * Sendable hash maps in `core::send_map`
5721 * `core::task' gained a (currently unsafe) task-local storage API
5724 * An efficient new intertask communication primitive called the pipe,
5725 along with a number of higher-level channel types, in `core::pipes`
5726 * `std::arc`, an atomically reference counted, immutable, shared memory
5728 * `std::sync`, various exotic synchronization tools based on arcs and pipes
5729 * Futures are now based on pipes and sendable
5730 * More robust linked task failure
5731 * Improved task builder API
5734 * Improved error reporting
5735 * Preliminary JIT support
5736 * Preliminary work on precise GC
5737 * Extensive architectural improvements to rustc
5738 * Begun a transition away from buggy C++-based reflection (shape) code to
5739 Rust-based (visitor) code
5740 * All hash functions and tables converted to secure, randomized SipHash
5743 Version 0.3 (2012-07-12)
5744 ========================
5746 * ~1900 changes, numerous bugfixes
5748 * New coding conveniences
5749 * Integer-literal suffix inference
5750 * Per-item control over warnings, errors
5751 * #[cfg(windows)] and #[cfg(unix)] attributes
5752 * Documentation comments
5753 * More compact closure syntax
5754 * 'do' expressions for treating higher-order functions as
5756 * *-patterns (wildcard extended to all constructor fields)
5759 * Name resolution pass and exhaustiveness checker rewritten
5760 * Region pointers and borrow checking supersede alias
5762 * Init-ness checking is now provided by a region-based liveness
5763 pass instead of the typestate pass; same for last-use analysis
5764 * Extensive work on region pointers
5766 * Experimental new language features
5767 * Slices and fixed-size, interior-allocated vectors
5768 * #!-comments for lang versioning, shell execution
5769 * Destructors and iface implementation for classes;
5770 type-parameterized classes and class methods
5771 * 'const' type kind for types that can be used to implement
5772 shared-memory concurrency patterns
5776 * Removal of various obsolete features
5777 * Keywords: 'be', 'prove', 'syntax', 'note', 'mutable', 'bind',
5778 'crust', 'native' (now 'extern'), 'cont' (now 'again')
5780 * Constructs: do-while loops ('do' repurposed), fn binding,
5781 resources (replaced by destructors)
5783 * Compiler reorganization
5784 * Syntax-layer of compiler split into separate crate
5785 * Clang (from LLVM project) integrated into build
5786 * Typechecker split into sub-modules
5789 * New time functions
5790 * Extension methods for many built-in types
5791 * Arc: atomic-refcount read-only / exclusive-use shared cells
5792 * Par: parallel map and search routines
5793 * Extensive work on libuv interface
5794 * Much vector code moved to libraries
5795 * Syntax extensions: #line, #col, #file, #mod, #stringify,
5796 #include, #include_str, #include_bin
5799 * Cargo automatically resolves dependencies
5802 Version 0.2 (2012-03-29)
5803 =========================
5805 * >1500 changes, numerous bugfixes
5807 * New docs and doc tooling
5809 * New port: FreeBSD x86_64
5811 * Compilation model enhancements
5812 * Generics now specialized, multiply instantiated
5813 * Functions now inlined across separate crates
5815 * Scheduling, stack and threading fixes
5816 * Noticeably improved message-passing performance
5817 * Explicit schedulers
5821 * Experimental new language features
5822 * Operator overloading
5826 * Various language extensions
5827 * C-callback function types: 'crust fn ...'
5828 * Infinite-loop construct: 'loop { ... }'
5829 * Shorten 'mutable' to 'mut'
5830 * Required mutable-local qualifier: 'let mut ...'
5831 * Basic glob-exporting: 'export foo::*;'
5832 * Alt now exhaustive, 'alt check' for runtime-checked
5833 * Block-function form of 'for' loop, with 'break' and 'ret'.
5836 * AST quasi-quote syntax extension
5837 * Revived libuv interface
5838 * New modules: core::{future, iter}, std::arena
5839 * Merged per-platform std::{os*, fs*} to core::{libc, os}
5840 * Extensive cleanup, regularization in libstd, libcore
5843 Version 0.1 (2012-01-20)
5844 ===============================
5846 * Most language features work, including:
5847 * Unique pointers, unique closures, move semantics
5848 * Interface-constrained generics
5849 * Static interface dispatch
5851 * Multithread task scheduling
5852 * Typestate predicates
5853 * Failure unwinding, destructors
5854 * Pattern matching and destructuring assignment
5855 * Lightweight block-lambda syntax
5856 * Preliminary macro-by-example
5858 * Compiler works with the following configurations:
5859 * Linux: x86 and x86_64 hosts and targets
5860 * macOS: x86 and x86_64 hosts and targets
5861 * Windows: x86 hosts and targets
5863 * Cross compilation / multi-target configuration supported.
5865 * Preliminary API-documentation and package-management tools included.
5869 * Documentation is incomplete.
5871 * Performance is below intended target.
5873 * Standard library APIs are subject to extensive change, reorganization.
5875 * Language-level versioning is not yet operational - future code will