1 Version 1.22.0 (2017-11-23)
2 ==========================
6 - [`non_snake_case` lint now allows extern no-mangle functions][44966]
7 - [Now accepts underscores in unicode escapes][43716]
8 - [`T op= &T` now works for numeric types.][44287] eg. `let mut x = 2; x += &8;`
9 - [types that impl `Drop` are now allowed in `const` and `static` types][44456]
13 - [rustc now defaults to having 16 codegen units at debug on supported platforms.][45064]
14 - [rustc will no longer inline in codegen units when compiling for debug][45075]
15 This should decrease compile times for debug builds.
16 - [strict memory alignment now enabled on ARMv6][45094]
17 - [Remove support for the PNaCl target `le32-unknown-nacl`][45041]
21 - [Allow atomic operations up to 32 bits
22 on `armv5te_unknown_linux_gnueabi`][44978]
23 - [`Box<Error>` now impls `From<Cow<str>>`][44466]
24 - [`std::mem::Discriminant` is now guaranteed to be `Send + Sync`][45095]
25 - [`fs::copy` now returns the length of the main stream on NTFS.][44895]
26 - [Properly detect overflow in `Instant += Duration`.][44220]
27 - [impl `Hasher` for `{&mut Hasher, Box<Hasher>}`][44015]
28 - [impl `fmt::Debug` for `SplitWhitespace`.][44303]
29 - [`Option<T>` now impls `Try`][42526] This allows for using `?` with `Option` types.
36 - [Cargo will now build multi file examples in subdirectories of the `examples`
37 folder that have a `main.rs` file.][cargo/4496]
38 - [Changed `[root]` to `[package]` in `Cargo.lock`][cargo/4571] Packages with
39 the old format will continue to work and can be updated with `cargo update`.
40 - [Now supports vendoring git repositories][cargo/3992]
44 - [`libbacktrace` is now available on Apple platforms.][44251]
45 - [Stabilised the `compile_fail` attribute for code fences in doc-comments.][43949]
46 This now lets you specify that a given code example will fail to compile.
50 - [The minimum Android version that rustc can build for has been bumped
51 to `4.0` from `2.3`][45656]
52 - [Allowing `T op= &T` for numeric types has broken some type
53 inference cases][45480]
56 [42526]: https://github.com/rust-lang/rust/pull/42526
57 [43017]: https://github.com/rust-lang/rust/pull/43017
58 [43716]: https://github.com/rust-lang/rust/pull/43716
59 [43949]: https://github.com/rust-lang/rust/pull/43949
60 [44015]: https://github.com/rust-lang/rust/pull/44015
61 [44220]: https://github.com/rust-lang/rust/pull/44220
62 [44251]: https://github.com/rust-lang/rust/pull/44251
63 [44287]: https://github.com/rust-lang/rust/pull/44287
64 [44303]: https://github.com/rust-lang/rust/pull/44303
65 [44456]: https://github.com/rust-lang/rust/pull/44456
66 [44466]: https://github.com/rust-lang/rust/pull/44466
67 [44895]: https://github.com/rust-lang/rust/pull/44895
68 [44966]: https://github.com/rust-lang/rust/pull/44966
69 [44978]: https://github.com/rust-lang/rust/pull/44978
70 [45041]: https://github.com/rust-lang/rust/pull/45041
71 [45064]: https://github.com/rust-lang/rust/pull/45064
72 [45075]: https://github.com/rust-lang/rust/pull/45075
73 [45094]: https://github.com/rust-lang/rust/pull/45094
74 [45095]: https://github.com/rust-lang/rust/pull/45095
75 [45480]: https://github.com/rust-lang/rust/issues/45480
76 [45656]: https://github.com/rust-lang/rust/pull/45656
77 [cargo/3992]: https://github.com/rust-lang/cargo/pull/3992
78 [cargo/4496]: https://github.com/rust-lang/cargo/pull/4496
79 [cargo/4571]: https://github.com/rust-lang/cargo/pull/4571
86 Version 1.21.0 (2017-10-12)
87 ==========================
91 - [You can now use static references for literals.][43838]
95 let x: &'static u32 = &0;
98 - [Relaxed path syntax. Optional `::` before `<` is now allowed in all contexts.][43540]
101 my_macro!(Vec<i32>::new); // Always worked
102 my_macro!(Vec::<i32>::new); // Now works
107 - [Upgraded jemalloc to 4.5.0][43911]
108 - [Enabled unwinding panics on Redox][43917]
109 - [Now runs LLVM in parallel during translation phase.][43506]
110 This should reduce peak memory usage.
114 - [Generate builtin impls for `Clone` for all arrays and tuples that
115 are `T: Clone`][43690]
116 - [`Stdin`, `Stdout`, and `Stderr` now implement `AsRawFd`.][43459]
117 - [`Rc` and `Arc` now implement `From<&[T]> where T: Clone`, `From<str>`,
118 `From<String>`, `From<Box<T>> where T: ?Sized`, and `From<Vec<T>>`.][42565]
123 [`std::mem::discriminant`]
127 - [You can now call `cargo install` with multiple package names][cargo/4216]
128 - [Cargo commands inside a virtual workspace will now implicitly
129 pass `--all`][cargo/4335]
130 - [Added a `[patch]` section to `Cargo.toml` to handle
131 prepublication dependencies][cargo/4123] [RFC 1969]
132 - [`include` & `exclude` fields in `Cargo.toml` now accept gitignore
133 like patterns][cargo/4270]
134 - [Added the `--all-targets` option][cargo/4400]
135 - [Using required dependencies as a feature is now deprecated and emits
136 a warning][cargo/4364]
141 - [Cargo docs are moving][43916]
142 to [doc.rust-lang.org/cargo](https://doc.rust-lang.org/cargo)
143 - [The rustdoc book is now available][43863]
144 at [doc.rust-lang.org/rustdoc](https://doc.rust-lang.org/rustdoc)
145 - [Added a preview of RLS has been made available through rustup][44204]
146 Install with `rustup component add rls-preview`
147 - [`std::os` documentation for Unix, Linux, and Windows now appears on doc.rust-lang.org][43348]
148 Previously only showed `std::os::unix`.
152 - [Changes in method matching against higher-ranked types][43880] This may cause
153 breakage in subtyping corner cases. [A more in-depth explanation is available.][info/43880]
154 - [rustc's JSON error output's byte position start at top of file.][42973]
155 Was previously relative to the rustc's internal `CodeMap` struct which
156 required the unstable library `libsyntax` to correctly use.
157 - [`unused_results` lint no longer ignores booleans][43728]
159 [42565]: https://github.com/rust-lang/rust/pull/42565
160 [42973]: https://github.com/rust-lang/rust/pull/42973
161 [43348]: https://github.com/rust-lang/rust/pull/43348
162 [43459]: https://github.com/rust-lang/rust/pull/43459
163 [43506]: https://github.com/rust-lang/rust/pull/43506
164 [43540]: https://github.com/rust-lang/rust/pull/43540
165 [43690]: https://github.com/rust-lang/rust/pull/43690
166 [43728]: https://github.com/rust-lang/rust/pull/43728
167 [43838]: https://github.com/rust-lang/rust/pull/43838
168 [43863]: https://github.com/rust-lang/rust/pull/43863
169 [43880]: https://github.com/rust-lang/rust/pull/43880
170 [43911]: https://github.com/rust-lang/rust/pull/43911
171 [43916]: https://github.com/rust-lang/rust/pull/43916
172 [43917]: https://github.com/rust-lang/rust/pull/43917
173 [44204]: https://github.com/rust-lang/rust/pull/44204
174 [cargo/4123]: https://github.com/rust-lang/cargo/pull/4123
175 [cargo/4216]: https://github.com/rust-lang/cargo/pull/4216
176 [cargo/4270]: https://github.com/rust-lang/cargo/pull/4270
177 [cargo/4335]: https://github.com/rust-lang/cargo/pull/4335
178 [cargo/4364]: https://github.com/rust-lang/cargo/pull/4364
179 [cargo/4400]: https://github.com/rust-lang/cargo/pull/4400
180 [RFC 1969]: https://github.com/rust-lang/rfcs/pull/1969
181 [info/43880]: https://github.com/rust-lang/rust/issues/44224#issuecomment-330058902
182 [`std::mem::discriminant`]: https://doc.rust-lang.org/std/mem/fn.discriminant.html
184 Version 1.20.0 (2017-08-31)
185 ===========================
189 - [Associated constants are now stabilised.][42809]
190 - [A lot of macro bugs are now fixed.][42913]
195 - [Struct fields are now properly coerced to the expected field type.][42807]
196 - [Enabled wasm LLVM backend][42571] WASM can now be built with the
197 `wasm32-experimental-emscripten` target.
198 - [Changed some of the error messages to be more helpful.][42033]
199 - [Add support for RELRO(RELocation Read-Only) for platforms that support
201 - [rustc now reports the total number of errors on compilation failure][43015]
202 previously this was only the number of errors in the pass that failed.
203 - [Expansion in rustc has been sped up 29x.][42533]
204 - [added `msp430-none-elf` target.][43099]
205 - [rustc will now suggest one-argument enum variant to fix type mismatch when
207 - [Fixes backtraces on Redox][43228]
208 - [rustc now identifies different versions of same crate when absolute paths of
209 different types match in an error message.][42826]
215 - [Relaxed Debug constraints on `{HashMap,BTreeMap}::{Keys,Values}`.][42854]
216 - [Impl `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Debug`, `Hash` for unsized
218 - [Impl `fmt::{Display, Debug}` for `Ref`, `RefMut`, `MutexGuard`,
219 `RwLockReadGuard`, `RwLockWriteGuard`][42822]
220 - [Impl `Clone` for `DefaultHasher`.][42799]
221 - [Impl `Sync` for `SyncSender`.][42397]
222 - [Impl `FromStr` for `char`][42271]
223 - [Fixed how `{f32, f64}::{is_sign_negative, is_sign_positive}` handles
225 - [allow messages in the `unimplemented!()` macro.][42155]
226 ie. `unimplemented!("Waiting for 1.21 to be stable")`
227 - [`pub(restricted)` is now supported in the `thread_local!` macro.][43185]
228 - [Upgrade to Unicode 10.0.0][42999]
229 - [Reimplemented `{f32, f64}::{min, max}` in Rust instead of using CMath.][42430]
230 - [Skip the main thread's manual stack guard on Linux][43072]
231 - [Iterator::nth for `ops::{Range, RangeFrom}` is now done in O(1) time][43077]
232 - [`#[repr(align(N))]` attribute max number is now 2^31 - 1.][43097] This was
234 - [`{OsStr, Path}::Display` now avoids allocations where possible][42613]
239 - [`CStr::into_c_string`]
240 - [`CString::as_c_str`]
241 - [`CString::into_boxed_c_str`]
244 - [`Chain::into_inner`]
245 - [`Option::get_or_insert_with`]
246 - [`Option::get_or_insert`]
247 - [`OsStr::into_os_string`]
248 - [`OsString::into_boxed_os_str`]
251 - [`Utf8Error::error_len`]
252 - [`char::EscapeDebug`]
253 - [`char::escape_debug`]
259 - [`mem::ManuallyDrop`]
260 - [`slice::sort_unstable_by_key`]
261 - [`slice::sort_unstable_by`]
262 - [`slice::sort_unstable`]
263 - [`str::from_boxed_utf8_unchecked`]
264 - [`str::as_bytes_mut`]
265 - [`str::as_bytes_mut`]
266 - [`str::from_utf8_mut`]
267 - [`str::from_utf8_unchecked_mut`]
269 - [`str::get_unchecked_mut`]
270 - [`str::get_unchecked`]
272 - [`str::into_boxed_bytes`]
277 - [Cargo API token location moved from `~/.cargo/config` to
278 `~/.cargo/credentials`.][cargo/3978]
279 - [Cargo will now build `main.rs` binaries that are in sub-directories of
280 `src/bin`.][cargo/4214] ie. Having `src/bin/server/main.rs` and
281 `src/bin/client/main.rs` generates `target/debug/server` and `target/debug/client`
282 - [You can now specify version of a binary when installed through
283 `cargo install` using `--vers`.][cargo/4229]
284 - [Added `--no-fail-fast` flag to cargo to run all benchmarks regardless of
285 failure.][cargo/4248]
286 - [Changed the convention around which file is the crate root.][cargo/4259]
287 - [The `include`/`exclude` property in `Cargo.toml` now accepts gitignore paths
288 instead of glob patterns][cargo/4270]. Glob patterns are now deprecated.
293 - [Functions with `'static` in their return types will now not be as usable as
294 if they were using lifetime parameters instead.][42417]
295 - [The reimplementation of `{f32, f64}::is_sign_{negative, positive}` now
296 takes the sign of NaN into account where previously didn't.][42430]
298 [42033]: https://github.com/rust-lang/rust/pull/42033
299 [42155]: https://github.com/rust-lang/rust/pull/42155
300 [42271]: https://github.com/rust-lang/rust/pull/42271
301 [42397]: https://github.com/rust-lang/rust/pull/42397
302 [42417]: https://github.com/rust-lang/rust/pull/42417
303 [42430]: https://github.com/rust-lang/rust/pull/42430
304 [42431]: https://github.com/rust-lang/rust/pull/42431
305 [42533]: https://github.com/rust-lang/rust/pull/42533
306 [42571]: https://github.com/rust-lang/rust/pull/42571
307 [42613]: https://github.com/rust-lang/rust/pull/42613
308 [42799]: https://github.com/rust-lang/rust/pull/42799
309 [42807]: https://github.com/rust-lang/rust/pull/42807
310 [42809]: https://github.com/rust-lang/rust/pull/42809
311 [42822]: https://github.com/rust-lang/rust/pull/42822
312 [42826]: https://github.com/rust-lang/rust/pull/42826
313 [42854]: https://github.com/rust-lang/rust/pull/42854
314 [42913]: https://github.com/rust-lang/rust/pull/42913
315 [42999]: https://github.com/rust-lang/rust/pull/42999
316 [43011]: https://github.com/rust-lang/rust/pull/43011
317 [43015]: https://github.com/rust-lang/rust/pull/43015
318 [43072]: https://github.com/rust-lang/rust/pull/43072
319 [43077]: https://github.com/rust-lang/rust/pull/43077
320 [43097]: https://github.com/rust-lang/rust/pull/43097
321 [43099]: https://github.com/rust-lang/rust/pull/43099
322 [43170]: https://github.com/rust-lang/rust/pull/43170
323 [43178]: https://github.com/rust-lang/rust/pull/43178
324 [43185]: https://github.com/rust-lang/rust/pull/43185
325 [43228]: https://github.com/rust-lang/rust/pull/43228
326 [cargo/3978]: https://github.com/rust-lang/cargo/pull/3978
327 [cargo/4214]: https://github.com/rust-lang/cargo/pull/4214
328 [cargo/4229]: https://github.com/rust-lang/cargo/pull/4229
329 [cargo/4248]: https://github.com/rust-lang/cargo/pull/4248
330 [cargo/4259]: https://github.com/rust-lang/cargo/pull/4259
331 [cargo/4270]: https://github.com/rust-lang/cargo/pull/4270
332 [`CStr::into_c_string`]: https://doc.rust-lang.org/std/ffi/struct.CStr.html#method.into_c_string
333 [`CString::as_c_str`]: https://doc.rust-lang.org/std/ffi/struct.CString.html#method.as_c_str
334 [`CString::into_boxed_c_str`]: https://doc.rust-lang.org/std/ffi/struct.CString.html#method.into_boxed_c_str
335 [`Chain::get_mut`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.get_mut
336 [`Chain::get_ref`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.get_ref
337 [`Chain::into_inner`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.into_inner
338 [`Option::get_or_insert_with`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.get_or_insert_with
339 [`Option::get_or_insert`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.get_or_insert
340 [`OsStr::into_os_string`]: https://doc.rust-lang.org/std/ffi/struct.OsStr.html#method.into_os_string
341 [`OsString::into_boxed_os_str`]: https://doc.rust-lang.org/std/ffi/struct.OsString.html#method.into_boxed_os_str
342 [`Take::get_mut`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.get_mut
343 [`Take::get_ref`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.get_ref
344 [`Utf8Error::error_len`]: https://doc.rust-lang.org/std/str/struct.Utf8Error.html#method.error_len
345 [`char::EscapeDebug`]: https://doc.rust-lang.org/std/char/struct.EscapeDebug.html
346 [`char::escape_debug`]: https://doc.rust-lang.org/std/primitive.char.html#method.escape_debug
347 [`compile_error!`]: https://doc.rust-lang.org/std/macro.compile_error.html
348 [`f32::from_bits`]: https://doc.rust-lang.org/std/primitive.f32.html#method.from_bits
349 [`f32::to_bits`]: https://doc.rust-lang.org/std/primitive.f32.html#method.to_bits
350 [`f64::from_bits`]: https://doc.rust-lang.org/std/primitive.f64.html#method.from_bits
351 [`f64::to_bits`]: https://doc.rust-lang.org/std/primitive.f64.html#method.to_bits
352 [`mem::ManuallyDrop`]: https://doc.rust-lang.org/std/mem/union.ManuallyDrop.html
353 [`slice::sort_unstable_by_key`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable_by_key
354 [`slice::sort_unstable_by`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable_by
355 [`slice::sort_unstable`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable
356 [`str::from_boxed_utf8_unchecked`]: https://doc.rust-lang.org/std/str/fn.from_boxed_utf8_unchecked.html
357 [`str::as_bytes_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.as_bytes_mut
358 [`str::from_utf8_mut`]: https://doc.rust-lang.org/std/str/fn.from_utf8_mut.html
359 [`str::from_utf8_unchecked_mut`]: https://doc.rust-lang.org/std/str/fn.from_utf8_unchecked_mut.html
360 [`str::get_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_mut
361 [`str::get_unchecked_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_unchecked_mut
362 [`str::get_unchecked`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_unchecked
363 [`str::get`]: https://doc.rust-lang.org/std/primitive.str.html#method.get
364 [`str::into_boxed_bytes`]: https://doc.rust-lang.org/std/primitive.str.html#method.into_boxed_bytes
367 Version 1.19.0 (2017-07-20)
368 ===========================
373 - [Numeric fields can now be used for creating tuple structs.][41145] [RFC 1506]
374 For example `struct Point(u32, u32); let x = Point { 0: 7, 1: 0 };`.
375 - [Macro recursion limit increased to 1024 from 64.][41676]
376 - [Added lint for detecting unused macros.][41907]
377 - [`loop` can now return a value with `break`.][42016] [RFC 1624]
378 For example: `let x = loop { break 7; };`
379 - [C compatible `union`s are now available.][42068] [RFC 1444] They can only
380 contain `Copy` types and cannot have a `Drop` implementation.
381 Example: `union Foo { bar: u8, baz: usize }`
382 - [Non capturing closures can now be coerced into `fn`s,][42162] [RFC 1558]
383 Example: `let foo: fn(u8) -> u8 = |v: u8| { v };`
388 - [Add support for bootstrapping the Rust compiler toolchain on Android.][41370]
389 - [Change `arm-linux-androideabi` to correspond to the `armeabi`
390 official ABI.][41656] If you wish to continue targeting the `armeabi-v7a` ABI
391 you should use `--target armv7-linux-androideabi`.
392 - [Fixed ICE when removing a source file between compilation sessions.][41873]
393 - [Minor optimisation of string operations.][42037]
394 - [Compiler error message is now `aborting due to previous error(s)` instead of
395 `aborting due to N previous errors`][42150] This was previously inaccurate and
396 would only count certain kinds of errors.
397 - [The compiler now supports Visual Studio 2017][42225]
398 - [The compiler is now built against LLVM 4.0.1 by default][42948]
399 - [Added a lot][42264] of [new error codes][42302]
400 - [Added `target-feature=+crt-static` option][37406] [RFC 1721] Which allows
401 libraries with C Run-time Libraries(CRT) to be statically linked.
402 - [Fixed various ARM codegen bugs][42740]
407 - [`String` now implements `FromIterator<Cow<'a, str>>` and
408 `Extend<Cow<'a, str>>`][41449]
409 - [`Vec` now implements `From<&mut [T]>`][41530]
410 - [`Box<[u8]>` now implements `From<Box<str>>`][41258]
411 - [`SplitWhitespace` now implements `Clone`][41659]
412 - [`[u8]::reverse` is now 5x faster and `[u16]::reverse` is now
414 - [`eprint!` and `eprintln!` macros added to prelude.][41192] Same as the `print!`
415 macros, but for printing to stderr.
420 - [`OsString::shrink_to_fit`]
423 - [`thread::ThreadId`]
428 - [Build scripts can now add environment variables to the environment
429 the crate is being compiled in.
430 Example: `println!("cargo:rustc-env=FOO=bar");`][cargo/3929]
431 - [Subcommands now replace the current process rather than spawning a new
432 child process][cargo/3970]
433 - [Workspace members can now accept glob file patterns][cargo/3979]
434 - [Added `--all` flag to the `cargo bench` subcommand to run benchmarks of all
435 the members in a given workspace.][cargo/3988]
436 - [Updated `libssh2-sys` to 0.2.6][cargo/4008]
437 - [Target directory path is now in the cargo metadata][cargo/4022]
438 - [Cargo no longer checks out a local working directory for the
439 crates.io index][cargo/4026] This should provide smaller file size for the
440 registry, and improve cloning times, especially on Windows machines.
441 - [Added an `--exclude` option for excluding certain packages when using the
442 `--all` option][cargo/4031]
443 - [Cargo will now automatically retry when receiving a 5xx error
444 from crates.io][cargo/4032]
445 - [The `--features` option now accepts multiple comma or space
446 delimited values.][cargo/4084]
447 - [Added support for custom target specific runners][cargo/3954]
452 - [Added `rust-windbg.cmd`][39983] for loading rust `.natvis` files in the
454 - [Rust will now release XZ compressed packages][rust-installer/57]
455 - [rustup will now prefer to download rust packages with
456 XZ compression][rustup/1100] over GZip packages.
457 - [Added the ability to escape `#` in rust documentation][41785] By adding
458 additional `#`'s ie. `##` is now `#`
463 - [`MutexGuard<T>` may only be `Sync` if `T` is `Sync`.][41624]
464 - [`-Z` flags are now no longer allowed to be used on the stable
465 compiler.][41751] This has been a warning for a year previous to this.
466 - [As a result of the `-Z` flag change, the `cargo-check` plugin no
467 longer works][42844]. Users should migrate to the built-in `check`
468 command, which has been available since 1.16.
469 - [Ending a float literal with `._` is now a hard error.
470 Example: `42._` .][41946]
471 - [Any use of a private `extern crate` outside of its module is now a
472 hard error.][36886] This was previously a warning.
473 - [`use ::self::foo;` is now a hard error.][36888] `self` paths are always
474 relative while the `::` prefix makes a path absolute, but was ignored and the
475 path was relative regardless.
476 - [Floating point constants in match patterns is now a hard error][36890]
477 This was previously a warning.
478 - [Struct or enum constants that don't derive `PartialEq` & `Eq` used
479 match patterns is now a hard error][36891] This was previously a warning.
480 - [Lifetimes named `'_` are no longer allowed.][36892] This was previously
482 - [From the pound escape, lines consisting of multiple `#`s are
484 - [It is an error to reexport private enum variants][42460]. This is
485 known to break a number of crates that depend on an older version of
487 - [On Windows, if `VCINSTALLDIR` is set incorrectly, `rustc` will try
488 to use it to find the linker, and the build will fail where it did
489 not previously][42607]
491 [36886]: https://github.com/rust-lang/rust/issues/36886
492 [36888]: https://github.com/rust-lang/rust/issues/36888
493 [36890]: https://github.com/rust-lang/rust/issues/36890
494 [36891]: https://github.com/rust-lang/rust/issues/36891
495 [36892]: https://github.com/rust-lang/rust/issues/36892
496 [37406]: https://github.com/rust-lang/rust/issues/37406
497 [39983]: https://github.com/rust-lang/rust/pull/39983
498 [41145]: https://github.com/rust-lang/rust/pull/41145
499 [41192]: https://github.com/rust-lang/rust/pull/41192
500 [41258]: https://github.com/rust-lang/rust/pull/41258
501 [41370]: https://github.com/rust-lang/rust/pull/41370
502 [41449]: https://github.com/rust-lang/rust/pull/41449
503 [41530]: https://github.com/rust-lang/rust/pull/41530
504 [41624]: https://github.com/rust-lang/rust/pull/41624
505 [41656]: https://github.com/rust-lang/rust/pull/41656
506 [41659]: https://github.com/rust-lang/rust/pull/41659
507 [41676]: https://github.com/rust-lang/rust/pull/41676
508 [41751]: https://github.com/rust-lang/rust/pull/41751
509 [41764]: https://github.com/rust-lang/rust/pull/41764
510 [41785]: https://github.com/rust-lang/rust/pull/41785
511 [41873]: https://github.com/rust-lang/rust/pull/41873
512 [41907]: https://github.com/rust-lang/rust/pull/41907
513 [41946]: https://github.com/rust-lang/rust/pull/41946
514 [42016]: https://github.com/rust-lang/rust/pull/42016
515 [42037]: https://github.com/rust-lang/rust/pull/42037
516 [42068]: https://github.com/rust-lang/rust/pull/42068
517 [42150]: https://github.com/rust-lang/rust/pull/42150
518 [42162]: https://github.com/rust-lang/rust/pull/42162
519 [42225]: https://github.com/rust-lang/rust/pull/42225
520 [42264]: https://github.com/rust-lang/rust/pull/42264
521 [42302]: https://github.com/rust-lang/rust/pull/42302
522 [42460]: https://github.com/rust-lang/rust/issues/42460
523 [42607]: https://github.com/rust-lang/rust/issues/42607
524 [42740]: https://github.com/rust-lang/rust/pull/42740
525 [42844]: https://github.com/rust-lang/rust/issues/42844
526 [42948]: https://github.com/rust-lang/rust/pull/42948
527 [RFC 1444]: https://github.com/rust-lang/rfcs/pull/1444
528 [RFC 1506]: https://github.com/rust-lang/rfcs/pull/1506
529 [RFC 1558]: https://github.com/rust-lang/rfcs/pull/1558
530 [RFC 1624]: https://github.com/rust-lang/rfcs/pull/1624
531 [RFC 1721]: https://github.com/rust-lang/rfcs/pull/1721
532 [`Command::envs`]: https://doc.rust-lang.org/std/process/struct.Command.html#method.envs
533 [`OsString::shrink_to_fit`]: https://doc.rust-lang.org/std/ffi/struct.OsString.html#method.shrink_to_fit
534 [`cmp::Reverse`]: https://doc.rust-lang.org/std/cmp/struct.Reverse.html
535 [`thread::ThreadId`]: https://doc.rust-lang.org/std/thread/struct.ThreadId.html
536 [cargo/3929]: https://github.com/rust-lang/cargo/pull/3929
537 [cargo/3954]: https://github.com/rust-lang/cargo/pull/3954
538 [cargo/3970]: https://github.com/rust-lang/cargo/pull/3970
539 [cargo/3979]: https://github.com/rust-lang/cargo/pull/3979
540 [cargo/3988]: https://github.com/rust-lang/cargo/pull/3988
541 [cargo/4008]: https://github.com/rust-lang/cargo/pull/4008
542 [cargo/4022]: https://github.com/rust-lang/cargo/pull/4022
543 [cargo/4026]: https://github.com/rust-lang/cargo/pull/4026
544 [cargo/4031]: https://github.com/rust-lang/cargo/pull/4031
545 [cargo/4032]: https://github.com/rust-lang/cargo/pull/4032
546 [cargo/4084]: https://github.com/rust-lang/cargo/pull/4084
547 [rust-installer/57]: https://github.com/rust-lang/rust-installer/pull/57
548 [rustup/1100]: https://github.com/rust-lang-nursery/rustup.rs/pull/1100
551 Version 1.18.0 (2017-06-08)
552 ===========================
557 - [Stabilize pub(restricted)][40556] `pub` can now accept a module path to
558 make the item visible to just that module tree. Also accepts the keyword
559 `crate` to make something public to the whole crate but not users of the
560 library. Example: `pub(crate) mod utils;`. [RFC 1422].
561 - [Stabilize `#![windows_subsystem]` attribute][40870] conservative exposure of the
562 `/SUBSYSTEM` linker flag on Windows platforms. [RFC 1665].
563 - [Refactor of trait object type parsing][40043] Now `ty` in macros can accept
564 types like `Write + Send`, trailing `+` are now supported in trait objects,
565 and better error reporting for trait objects starting with `?Sized`.
566 - [0e+10 is now a valid floating point literal][40589]
567 - [Now warns if you bind a lifetime parameter to 'static][40734]
568 - [Tuples, Enum variant fields, and structs with no `repr` attribute or with
569 `#[repr(Rust)]` are reordered to minimize padding and produce a smaller
570 representation in some cases.][40377]
575 - [rustc can now emit mir with `--emit mir`][39891]
576 - [Improved LLVM IR for trivial functions][40367]
577 - [Added explanation for E0090(Wrong number of lifetimes are supplied)][40723]
578 - [rustc compilation is now 15%-20% faster][41469] Thanks to optimisation
579 opportunities found through profiling
580 - [Improved backtrace formatting when panicking][38165]
585 - [Specialized `Vec::from_iter` being passed `vec::IntoIter`][40731] if the
586 iterator hasn't been advanced the original `Vec` is reassembled with no actual
587 iteration or reallocation.
588 - [Simplified HashMap Bucket interface][40561] provides performance
589 improvements for iterating and cloning.
590 - [Specialize Vec::from_elem to use calloc][40409]
591 - [Fixed Race condition in fs::create_dir_all][39799]
592 - [No longer caching stdio on Windows][40516]
593 - [Optimized insertion sort in slice][40807] insertion sort in some cases
594 2.50%~ faster and in one case now 12.50% faster.
595 - [Optimized `AtomicBool::fetch_nand`][41143]
600 - [`Child::try_wait`]
601 - [`HashMap::retain`]
602 - [`HashSet::retain`]
604 - [`TcpStream::peek`]
605 - [`UdpSocket::peek`]
606 - [`UdpSocket::peek_from`]
611 - [Added partial Pijul support][cargo/3842] Pijul is a version control system in Rust.
612 You can now create new cargo projects with Pijul using `cargo new --vcs pijul`
613 - [Now always emits build script warnings for crates that fail to build][cargo/3847]
614 - [Added Android build support][cargo/3885]
615 - [Added `--bins` and `--tests` flags][cargo/3901] now you can build all programs
616 of a certain type, for example `cargo build --bins` will build all
618 - [Added support for haiku][cargo/3952]
623 - [rustdoc can now use pulldown-cmark with the `--enable-commonmark` flag][40338]
624 - [Added rust-windbg script for better debugging on Windows][39983]
625 - [Rust now uses the official cross compiler for NetBSD][40612]
626 - [rustdoc now accepts `#` at the start of files][40828]
627 - [Fixed jemalloc support for musl][41168]
632 - [Changes to how the `0` flag works in format!][40241] Padding zeroes are now
633 always placed after the sign if it exists and before the digits. With the `#`
634 flag the zeroes are placed after the prefix and before the digits.
635 - [Due to the struct field optimisation][40377], using `transmute` on structs
636 that have no `repr` attribute or `#[repr(Rust)]` will no longer work. This has
637 always been undefined behavior, but is now more likely to break in practice.
638 - [The refactor of trait object type parsing][40043] fixed a bug where `+` was
639 receiving the wrong priority parsing things like `&for<'a> Tr<'a> + Send` as
640 `&(for<'a> Tr<'a> + Send)` instead of `(&for<'a> Tr<'a>) + Send`
641 - [Overlapping inherent `impl`s are now a hard error][40728]
642 - [`PartialOrd` and `Ord` must agree on the ordering.][41270]
643 - [`rustc main.rs -o out --emit=asm,llvm-ir`][41085] Now will output
644 `out.asm` and `out.ll` instead of only one of the filetypes.
645 - [ calling a function that returns `Self` will no longer work][41805] when
646 the size of `Self` cannot be statically determined.
647 - [rustc now builds with a "pthreads" flavour of MinGW for Windows GNU][40805]
648 this has caused a few regressions namely:
650 - Changed the link order of local static/dynamic libraries (respecting the
651 order on given rather than having the compiler reorder).
652 - Changed how MinGW is linked, native code linked to dynamic libraries
653 may require manually linking to the gcc support library (for the native
656 [38165]: https://github.com/rust-lang/rust/pull/38165
657 [39799]: https://github.com/rust-lang/rust/pull/39799
658 [39891]: https://github.com/rust-lang/rust/pull/39891
659 [39983]: https://github.com/rust-lang/rust/pull/39983
660 [40043]: https://github.com/rust-lang/rust/pull/40043
661 [40241]: https://github.com/rust-lang/rust/pull/40241
662 [40338]: https://github.com/rust-lang/rust/pull/40338
663 [40367]: https://github.com/rust-lang/rust/pull/40367
664 [40377]: https://github.com/rust-lang/rust/pull/40377
665 [40409]: https://github.com/rust-lang/rust/pull/40409
666 [40516]: https://github.com/rust-lang/rust/pull/40516
667 [40556]: https://github.com/rust-lang/rust/pull/40556
668 [40561]: https://github.com/rust-lang/rust/pull/40561
669 [40589]: https://github.com/rust-lang/rust/pull/40589
670 [40612]: https://github.com/rust-lang/rust/pull/40612
671 [40723]: https://github.com/rust-lang/rust/pull/40723
672 [40728]: https://github.com/rust-lang/rust/pull/40728
673 [40731]: https://github.com/rust-lang/rust/pull/40731
674 [40734]: https://github.com/rust-lang/rust/pull/40734
675 [40805]: https://github.com/rust-lang/rust/pull/40805
676 [40807]: https://github.com/rust-lang/rust/pull/40807
677 [40828]: https://github.com/rust-lang/rust/pull/40828
678 [40870]: https://github.com/rust-lang/rust/pull/40870
679 [41085]: https://github.com/rust-lang/rust/pull/41085
680 [41143]: https://github.com/rust-lang/rust/pull/41143
681 [41168]: https://github.com/rust-lang/rust/pull/41168
682 [41270]: https://github.com/rust-lang/rust/issues/41270
683 [41469]: https://github.com/rust-lang/rust/pull/41469
684 [41805]: https://github.com/rust-lang/rust/issues/41805
685 [RFC 1422]: https://github.com/rust-lang/rfcs/blob/master/text/1422-pub-restricted.md
686 [RFC 1665]: https://github.com/rust-lang/rfcs/blob/master/text/1665-windows-subsystem.md
687 [`Child::try_wait`]: https://doc.rust-lang.org/std/process/struct.Child.html#method.try_wait
688 [`HashMap::retain`]: https://doc.rust-lang.org/std/collections/struct.HashMap.html#method.retain
689 [`HashSet::retain`]: https://doc.rust-lang.org/std/collections/struct.HashSet.html#method.retain
690 [`PeekMut::pop`]: https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html#method.pop
691 [`TcpStream::peek`]: https://doc.rust-lang.org/std/net/struct.TcpStream.html#method.peek
692 [`UdpSocket::peek_from`]: https://doc.rust-lang.org/std/net/struct.UdpSocket.html#method.peek_from
693 [`UdpSocket::peek`]: https://doc.rust-lang.org/std/net/struct.UdpSocket.html#method.peek
694 [cargo/3842]: https://github.com/rust-lang/cargo/pull/3842
695 [cargo/3847]: https://github.com/rust-lang/cargo/pull/3847
696 [cargo/3885]: https://github.com/rust-lang/cargo/pull/3885
697 [cargo/3901]: https://github.com/rust-lang/cargo/pull/3901
698 [cargo/3952]: https://github.com/rust-lang/cargo/pull/3952
701 Version 1.17.0 (2017-04-27)
702 ===========================
707 * [The lifetime of statics and consts defaults to `'static`][39265]. [RFC 1623]
708 * [Fields of structs may be initialized without duplicating the field/variable
709 names][39761]. [RFC 1682]
710 * [`Self` may be included in the `where` clause of `impls`][38864]. [RFC 1647]
711 * [When coercing to an unsized type lifetimes must be equal][40319]. That is,
712 there is no subtyping between `T` and `U` when `T: Unsize<U>`. For example,
713 coercing `&mut [&'a X; N]` to `&mut [&'b X]` requires `'a` be equal to
715 * [Values passed to the indexing operator, `[]`, automatically coerce][40166]
716 * [Static variables may contain references to other statics][40027]
721 * [Exit quickly on only `--emit dep-info`][40336]
722 * [Make `-C relocation-model` more correctly determine whether the linker
723 creates a position-independent executable][40245]
724 * [Add `-C overflow-checks` to directly control whether integer overflow
726 * [The rustc type checker now checks items on demand instead of in a single
727 in-order pass][40008]. This is mostly an internal refactoring in support of
728 future work, including incremental type checking, but also resolves [RFC
729 1647], allowing `Self` to appear in `impl` `where` clauses.
730 * [Optimize vtable loads][39995]
731 * [Turn off vectorization for Emscripten targets][39990]
732 * [Provide suggestions for unknown macros imported with `use`][39953]
733 * [Fix ICEs in path resolution][39939]
734 * [Strip exception handling code on Emscripten when `panic=abort`][39193]
735 * [Add clearer error message using `&str + &str`][39116]
747 * [`Ordering::then_with`]
748 * [`BTreeMap::range`]
749 * [`BTreeMap::range_mut`]
750 * [`collections::Bound`]
752 * [`ptr::read_unaligned`]
753 * [`ptr::write_unaligned`]
754 * [`Result::expect_err`]
757 * [`Cell::into_inner`]
763 * [`BTreeMap` and `BTreeSet` can iterate over ranges][27787]
764 * [`Cell` can store non-`Copy` types][39793]. [RFC 1651]
765 * [`String` implements `FromIterator<&char>`][40028]
766 * `Box` [implements][40009] a number of new conversions:
767 `From<Box<str>> for String`,
768 `From<Box<[T]>> for Vec<T>`,
769 `From<Box<CStr>> for CString`,
770 `From<Box<OsStr>> for OsString`,
771 `From<Box<Path>> for PathBuf`,
772 `Into<Box<str>> for String`,
773 `Into<Box<[T]>> for Vec<T>`,
774 `Into<Box<CStr>> for CString`,
775 `Into<Box<OsStr>> for OsString`,
776 `Into<Box<Path>> for PathBuf`,
777 `Default for Box<str>`,
778 `Default for Box<CStr>`,
779 `Default for Box<OsStr>`,
780 `From<&CStr> for Box<CStr>`,
781 `From<&OsStr> for Box<OsStr>`,
782 `From<&Path> for Box<Path>`
783 * [`ffi::FromBytesWithNulError` implements `Error` and `Display`][39960]
784 * [Specialize `PartialOrd<A> for [A] where A: Ord`][39642]
785 * [Slightly optimize `slice::sort`][39538]
786 * [Add `ToString` trait specialization for `Cow<'a, str>` and `String`][39440]
787 * [`Box<[T]>` implements `From<&[T]> where T: Copy`,
788 `Box<str>` implements `From<&str>`][39438]
789 * [`IpAddr` implements `From` for various arrays. `SocketAddr` implements
790 `From<(I, u16)> where I: Into<IpAddr>`][39372]
791 * [`format!` estimates the needed capacity before writing a string][39356]
792 * [Support unprivileged symlink creation in Windows][38921]
793 * [`PathBuf` implements `Default`][38764]
794 * [Implement `PartialEq<[A]>` for `VecDeque<A>`][38661]
795 * [`HashMap` resizes adaptively][38368] to guard against DOS attacks
796 and poor hash functions.
801 * [Add `cargo check --all`][cargo/3731]
802 * [Add an option to ignore SSL revocation checking][cargo/3699]
803 * [Add `cargo run --package`][cargo/3691]
804 * [Add `required_features`][cargo/3667]
805 * [Assume `build.rs` is a build script][cargo/3664]
806 * [Find workspace via `workspace_root` link in containing member][cargo/3562]
811 * [Documentation is rendered with mdbook instead of the obsolete, in-tree
813 * [The "Unstable Book" documents nightly-only features][ubook]
814 * [Improve the style of the sidebar in rustdoc output][40265]
815 * [Configure build correctly on 64-bit CPU's with the armhf ABI][40261]
816 * [Fix MSP430 breakage due to `i128`][40257]
817 * [Preliminary Solaris/SPARCv9 support][39903]
818 * [`rustc` is linked statically on Windows MSVC targets][39837], allowing it to
819 run without installing the MSVC runtime.
820 * [`rustdoc --test` includes file names in test names][39788]
821 * This release includes builds of `std` for `sparc64-unknown-linux-gnu`,
822 `aarch64-unknown-linux-fuchsia`, and `x86_64-unknown-linux-fuchsia`.
823 * [Initial support for `aarch64-unknown-freebsd`][39491]
824 * [Initial support for `i686-unknown-netbsd`][39426]
825 * [This release no longer includes the old makefile build system][39431]. Rust
826 is built with a custom build system, written in Rust, and with Cargo.
827 * [Add Debug implementations for libcollection structs][39002]
828 * [`TypeId` implements `PartialOrd` and `Ord`][38981]
829 * [`--test-threads=0` produces an error][38945]
830 * [`rustup` installs documentation by default][40526]
831 * [The Rust source includes NatVis visualizations][39843]. These can be used by
832 WinDbg and Visual Studio to improve the debugging experience.
837 * [Rust 1.17 does not correctly detect the MSVC 2017 linker][38584]. As a
838 workaround, either use MSVC 2015 or run vcvars.bat.
839 * [When coercing to an unsized type lifetimes must be equal][40319]. That is,
840 disallow subtyping between `T` and `U` when `T: Unsize<U>`, e.g. coercing
841 `&mut [&'a X; N]` to `&mut [&'b X]` requires `'a` be equal to `'b`. Soundness
843 * [`format!` and `Display::to_string` panic if an underlying formatting
844 implementation returns an error][40117]. Previously the error was silently
845 ignored. It is incorrect for `write_fmt` to return an error when writing
847 * [In-tree crates are verified to be unstable][39851]. Previously, some minor
848 crates were marked stable and could be accessed from the stable toolchain.
849 * [Rust git source no longer includes vendored crates][39728]. Those that need
850 to build with vendored crates should build from release tarballs.
851 * [Fix inert attributes from `proc_macro_derives`][39572]
852 * [During crate resolution, rustc prefers a crate in the sysroot if two crates
853 are otherwise identical][39518]. Unlikely to be encountered outside the Rust
855 * [Fixed bugs around how type inference interacts with dead-code][39485]. The
856 existing code generally ignores the type of dead-code unless a type-hint is
857 provided; this can cause surprising inference interactions particularly around
858 defaulting. The new code uniformly ignores the result type of dead-code.
859 * [Tuple-struct constructors with private fields are no longer visible][38932]
860 * [Lifetime parameters that do not appear in the arguments are now considered
861 early-bound][38897], resolving a soundness bug (#[32330]). The
862 `hr_lifetime_in_assoc_type` future-compatibility lint has been in effect since
864 * [rustdoc: fix doctests with non-feature crate attributes][38161]
865 * [Make transmuting from fn item types to pointer-sized types a hard
868 [27787]: https://github.com/rust-lang/rust/issues/27787
869 [32330]: https://github.com/rust-lang/rust/issues/32330
870 [34198]: https://github.com/rust-lang/rust/pull/34198
871 [38161]: https://github.com/rust-lang/rust/pull/38161
872 [38368]: https://github.com/rust-lang/rust/pull/38368
873 [38584]: https://github.com/rust-lang/rust/issues/38584
874 [38661]: https://github.com/rust-lang/rust/pull/38661
875 [38764]: https://github.com/rust-lang/rust/pull/38764
876 [38864]: https://github.com/rust-lang/rust/issues/38864
877 [38897]: https://github.com/rust-lang/rust/pull/38897
878 [38921]: https://github.com/rust-lang/rust/pull/38921
879 [38932]: https://github.com/rust-lang/rust/pull/38932
880 [38945]: https://github.com/rust-lang/rust/pull/38945
881 [38981]: https://github.com/rust-lang/rust/pull/38981
882 [39002]: https://github.com/rust-lang/rust/pull/39002
883 [39116]: https://github.com/rust-lang/rust/pull/39116
884 [39193]: https://github.com/rust-lang/rust/pull/39193
885 [39265]: https://github.com/rust-lang/rust/pull/39265
886 [39356]: https://github.com/rust-lang/rust/pull/39356
887 [39372]: https://github.com/rust-lang/rust/pull/39372
888 [39426]: https://github.com/rust-lang/rust/pull/39426
889 [39431]: https://github.com/rust-lang/rust/pull/39431
890 [39438]: https://github.com/rust-lang/rust/pull/39438
891 [39440]: https://github.com/rust-lang/rust/pull/39440
892 [39485]: https://github.com/rust-lang/rust/pull/39485
893 [39491]: https://github.com/rust-lang/rust/pull/39491
894 [39518]: https://github.com/rust-lang/rust/pull/39518
895 [39538]: https://github.com/rust-lang/rust/pull/39538
896 [39572]: https://github.com/rust-lang/rust/pull/39572
897 [39633]: https://github.com/rust-lang/rust/pull/39633
898 [39642]: https://github.com/rust-lang/rust/pull/39642
899 [39728]: https://github.com/rust-lang/rust/pull/39728
900 [39761]: https://github.com/rust-lang/rust/pull/39761
901 [39788]: https://github.com/rust-lang/rust/pull/39788
902 [39793]: https://github.com/rust-lang/rust/pull/39793
903 [39837]: https://github.com/rust-lang/rust/pull/39837
904 [39843]: https://github.com/rust-lang/rust/pull/39843
905 [39851]: https://github.com/rust-lang/rust/pull/39851
906 [39903]: https://github.com/rust-lang/rust/pull/39903
907 [39939]: https://github.com/rust-lang/rust/pull/39939
908 [39953]: https://github.com/rust-lang/rust/pull/39953
909 [39960]: https://github.com/rust-lang/rust/pull/39960
910 [39990]: https://github.com/rust-lang/rust/pull/39990
911 [39995]: https://github.com/rust-lang/rust/pull/39995
912 [40008]: https://github.com/rust-lang/rust/pull/40008
913 [40009]: https://github.com/rust-lang/rust/pull/40009
914 [40027]: https://github.com/rust-lang/rust/pull/40027
915 [40028]: https://github.com/rust-lang/rust/pull/40028
916 [40037]: https://github.com/rust-lang/rust/pull/40037
917 [40117]: https://github.com/rust-lang/rust/pull/40117
918 [40166]: https://github.com/rust-lang/rust/pull/40166
919 [40245]: https://github.com/rust-lang/rust/pull/40245
920 [40257]: https://github.com/rust-lang/rust/pull/40257
921 [40261]: https://github.com/rust-lang/rust/pull/40261
922 [40265]: https://github.com/rust-lang/rust/pull/40265
923 [40319]: https://github.com/rust-lang/rust/pull/40319
924 [40336]: https://github.com/rust-lang/rust/pull/40336
925 [40526]: https://github.com/rust-lang/rust/pull/40526
926 [RFC 1623]: https://github.com/rust-lang/rfcs/blob/master/text/1623-static.md
927 [RFC 1647]: https://github.com/rust-lang/rfcs/blob/master/text/1647-allow-self-in-where-clauses.md
928 [RFC 1651]: https://github.com/rust-lang/rfcs/blob/master/text/1651-movecell.md
929 [RFC 1682]: https://github.com/rust-lang/rfcs/blob/master/text/1682-field-init-shorthand.md
930 [`Arc::from_raw`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.from_raw
931 [`Arc::into_raw`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.into_raw
932 [`Arc::ptr_eq`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.ptr_eq
933 [`BTreeMap::range_mut`]: https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.range_mut
934 [`BTreeMap::range`]: https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.range
935 [`Cell::into_inner`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.into_inner
936 [`Cell::replace`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.replace
937 [`Cell::swap`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.swap
938 [`Cell::take`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.take
939 [`Ordering::then_with`]: https://doc.rust-lang.org/std/cmp/enum.Ordering.html#method.then_with
940 [`Ordering::then`]: https://doc.rust-lang.org/std/cmp/enum.Ordering.html#method.then
941 [`Rc::from_raw`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.from_raw
942 [`Rc::into_raw`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.into_raw
943 [`Rc::ptr_eq`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.ptr_eq
944 [`Result::expect_err`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.expect_err
945 [`collections::Bound`]: https://doc.rust-lang.org/std/collections/enum.Bound.html
946 [`process::abort`]: https://doc.rust-lang.org/std/process/fn.abort.html
947 [`ptr::read_unaligned`]: https://doc.rust-lang.org/std/ptr/fn.read_unaligned.html
948 [`ptr::write_unaligned`]: https://doc.rust-lang.org/std/ptr/fn.write_unaligned.html
949 [cargo/3562]: https://github.com/rust-lang/cargo/pull/3562
950 [cargo/3664]: https://github.com/rust-lang/cargo/pull/3664
951 [cargo/3667]: https://github.com/rust-lang/cargo/pull/3667
952 [cargo/3691]: https://github.com/rust-lang/cargo/pull/3691
953 [cargo/3699]: https://github.com/rust-lang/cargo/pull/3699
954 [cargo/3731]: https://github.com/rust-lang/cargo/pull/3731
955 [mdbook]: https://crates.io/crates/mdbook
956 [ubook]: https://doc.rust-lang.org/unstable-book/
959 Version 1.16.0 (2017-03-16)
960 ===========================
965 * [The compiler's `dead_code` lint now accounts for type aliases][38051].
966 * [Uninhabitable enums (those without any variants) no longer permit wildcard
967 match patterns][38069]
968 * [Clean up semantics of `self` in an import list][38313]
969 * [`Self` may appear in `impl` headers][38920]
970 * [`Self` may appear in struct expressions][39282]
975 * [`rustc` now supports `--emit=metadata`, which causes rustc to emit
976 a `.rmeta` file containing only crate metadata][38571]. This can be
977 used by tools like the Rust Language Service to perform
978 metadata-only builds.
979 * [Levenshtein based typo suggestions now work in most places, while
980 previously they worked only for fields and sometimes for local
981 variables][38927]. Together with the overhaul of "no
982 resolution"/"unexpected resolution" errors (#[38154]) they result in
983 large and systematic improvement in resolution diagnostics.
984 * [Fix `transmute::<T, U>` where `T` requires a bigger alignment than
986 * [rustc: use -Xlinker when specifying an rpath with ',' in it][38798]
987 * [`rustc` no longer attempts to provide "consider using an explicit
988 lifetime" suggestions][37057]. They were inaccurate.
993 * [`VecDeque::truncate`]
994 * [`VecDeque::resize`]
995 * [`String::insert_str`]
996 * [`Duration::checked_add`]
997 * [`Duration::checked_sub`]
998 * [`Duration::checked_div`]
999 * [`Duration::checked_mul`]
1002 * [`SocketAddr::is_ipv4`]
1003 * [`SocketAddr::is_ipv6`]
1004 * [`IpAddr::is_ipv4`]
1005 * [`IpAddr::is_ipv6`]
1007 * [`Vec::dedup_by_key`]
1008 * [`Result::unwrap_or_default`]
1009 * [`<*const T>::wrapping_offset`]
1010 * [`<*mut T>::wrapping_offset`]
1011 * `CommandExt::creation_flags`
1012 * [`File::set_permissions`]
1013 * [`String::split_off`]
1018 * [`[T]::binary_search` and `[T]::binary_search_by_key` now take
1019 their argument by `Borrow` parameter][37761]
1020 * [All public types in std implement `Debug`][38006]
1021 * [`IpAddr` implements `From<Ipv4Addr>` and `From<Ipv6Addr>`][38327]
1022 * [`Ipv6Addr` implements `From<[u16; 8]>`][38131]
1023 * [Ctrl-Z returns from `Stdin.read()` when reading from the console on
1025 * [std: Fix partial writes in `LineWriter`][38062]
1026 * [std: Clamp max read/write sizes on Unix][38062]
1027 * [Use more specific panic message for `&str` slicing errors][38066]
1028 * [`TcpListener::set_only_v6` is deprecated][38304]. This
1029 functionality cannot be achieved in std currently.
1030 * [`writeln!`, like `println!`, now accepts a form with no string
1031 or formatting arguments, to just print a newline][38469]
1032 * [Implement `iter::Sum` and `iter::Product` for `Result`][38580]
1033 * [Reduce the size of static data in `std_unicode::tables`][38781]
1034 * [`char::EscapeDebug`, `EscapeDefault`, `EscapeUnicode`,
1035 `CaseMappingIter`, `ToLowercase`, `ToUppercase`, implement
1037 * [`Duration` implements `Sum`][38712]
1038 * [`String` implements `ToSocketAddrs`][39048]
1043 * [The `cargo check` command does a type check of a project without
1044 building it][cargo/3296]
1045 * [crates.io will display CI badges from Travis and AppVeyor, if
1046 specified in Cargo.toml][cargo/3546]
1047 * [crates.io will display categories listed in Cargo.toml][cargo/3301]
1048 * [Compilation profiles accept integer values for `debug`, in addition
1049 to `true` and `false`. These are passed to `rustc` as the value to
1050 `-C debuginfo`][cargo/3534]
1051 * [Implement `cargo --version --verbose`][cargo/3604]
1052 * [All builds now output 'dep-info' build dependencies compatible with
1053 make and ninja][cargo/3557]
1054 * [Build all workspace members with `build --all`][cargo/3511]
1055 * [Document all workspace members with `doc --all`][cargo/3515]
1056 * [Path deps outside workspace are not members][cargo/3443]
1061 * [`rustdoc` has a `--sysroot` argument that, like `rustc`, specifies
1062 the path to the Rust implementation][38589]
1063 * [The `armv7-linux-androideabi` target no longer enables NEON
1064 extensions, per Google's ABI guide][38413]
1065 * [The stock standard library can be compiled for Redox OS][38401]
1066 * [Rust has initial SPARC support][38726]. Tier 3. No builds
1068 * [Rust has experimental support for Nvidia PTX][38559]. Tier 3. No
1070 * [Fix backtraces on i686-pc-windows-gnu by disabling FPO][39379]
1075 * [Uninhabitable enums (those without any variants) no longer permit wildcard
1076 match patterns][38069]
1077 * In this release, references to uninhabited types can not be
1078 pattern-matched. This was accidentally allowed in 1.15.
1079 * [The compiler's `dead_code` lint now accounts for type aliases][38051].
1080 * [Ctrl-Z returns from `Stdin.read()` when reading from the console on
1082 * [Clean up semantics of `self` in an import list][38313]
1083 * Reimplemented lifetime elision. This change was almost entirely compatible
1084 with existing code, but it did close a number of small bugs and loopholes,
1085 as well as being more accepting in some other [cases][41105].
1087 [37057]: https://github.com/rust-lang/rust/pull/37057
1088 [37761]: https://github.com/rust-lang/rust/pull/37761
1089 [38006]: https://github.com/rust-lang/rust/pull/38006
1090 [38051]: https://github.com/rust-lang/rust/pull/38051
1091 [38062]: https://github.com/rust-lang/rust/pull/38062
1092 [38062]: https://github.com/rust-lang/rust/pull/38622
1093 [38066]: https://github.com/rust-lang/rust/pull/38066
1094 [38069]: https://github.com/rust-lang/rust/pull/38069
1095 [38131]: https://github.com/rust-lang/rust/pull/38131
1096 [38154]: https://github.com/rust-lang/rust/pull/38154
1097 [38274]: https://github.com/rust-lang/rust/pull/38274
1098 [38304]: https://github.com/rust-lang/rust/pull/38304
1099 [38313]: https://github.com/rust-lang/rust/pull/38313
1100 [38314]: https://github.com/rust-lang/rust/pull/38314
1101 [38327]: https://github.com/rust-lang/rust/pull/38327
1102 [38401]: https://github.com/rust-lang/rust/pull/38401
1103 [38413]: https://github.com/rust-lang/rust/pull/38413
1104 [38469]: https://github.com/rust-lang/rust/pull/38469
1105 [38559]: https://github.com/rust-lang/rust/pull/38559
1106 [38571]: https://github.com/rust-lang/rust/pull/38571
1107 [38580]: https://github.com/rust-lang/rust/pull/38580
1108 [38589]: https://github.com/rust-lang/rust/pull/38589
1109 [38670]: https://github.com/rust-lang/rust/pull/38670
1110 [38712]: https://github.com/rust-lang/rust/pull/38712
1111 [38726]: https://github.com/rust-lang/rust/pull/38726
1112 [38781]: https://github.com/rust-lang/rust/pull/38781
1113 [38798]: https://github.com/rust-lang/rust/pull/38798
1114 [38909]: https://github.com/rust-lang/rust/pull/38909
1115 [38920]: https://github.com/rust-lang/rust/pull/38920
1116 [38927]: https://github.com/rust-lang/rust/pull/38927
1117 [39048]: https://github.com/rust-lang/rust/pull/39048
1118 [39282]: https://github.com/rust-lang/rust/pull/39282
1119 [39379]: https://github.com/rust-lang/rust/pull/39379
1120 [41105]: https://github.com/rust-lang/rust/issues/41105
1121 [`<*const T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset
1122 [`<*mut T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset
1123 [`Duration::checked_add`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_add
1124 [`Duration::checked_div`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_div
1125 [`Duration::checked_mul`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_mul
1126 [`Duration::checked_sub`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_sub
1127 [`File::set_permissions`]: https://doc.rust-lang.org/std/fs/struct.File.html#method.set_permissions
1128 [`IpAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv4
1129 [`IpAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv6
1130 [`Result::unwrap_or_default`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.unwrap_or_default
1131 [`SocketAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv4
1132 [`SocketAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv6
1133 [`String::insert_str`]: https://doc.rust-lang.org/std/string/struct.String.html#method.insert_str
1134 [`String::split_off`]: https://doc.rust-lang.org/std/string/struct.String.html#method.split_off
1135 [`Vec::dedup_by_key`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by_key
1136 [`Vec::dedup_by`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by
1137 [`VecDeque::resize`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.resize
1138 [`VecDeque::truncate`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.truncate
1139 [`str::repeat`]: https://doc.rust-lang.org/std/primitive.str.html#method.repeat
1140 [`str::replacen`]: https://doc.rust-lang.org/std/primitive.str.html#method.replacen
1141 [cargo/3296]: https://github.com/rust-lang/cargo/pull/3296
1142 [cargo/3301]: https://github.com/rust-lang/cargo/pull/3301
1143 [cargo/3443]: https://github.com/rust-lang/cargo/pull/3443
1144 [cargo/3511]: https://github.com/rust-lang/cargo/pull/3511
1145 [cargo/3515]: https://github.com/rust-lang/cargo/pull/3515
1146 [cargo/3534]: https://github.com/rust-lang/cargo/pull/3534
1147 [cargo/3546]: https://github.com/rust-lang/cargo/pull/3546
1148 [cargo/3557]: https://github.com/rust-lang/cargo/pull/3557
1149 [cargo/3604]: https://github.com/rust-lang/cargo/pull/3604
1150 [RFC 1623]: https://github.com/rust-lang/rfcs/blob/master/text/1623-static.md
1153 Version 1.15.1 (2017-02-09)
1154 ===========================
1156 * [Fix IntoIter::as_mut_slice's signature][39466]
1157 * [Compile compiler builtins with `-fPIC` on 32-bit platforms][39523]
1159 [39466]: https://github.com/rust-lang/rust/pull/39466
1160 [39523]: https://github.com/rust-lang/rust/pull/39523
1163 Version 1.15.0 (2017-02-02)
1164 ===========================
1169 * Basic procedural macros allowing custom `#[derive]`, aka "macros 1.1", are
1170 stable. This allows popular code-generating crates like Serde and Diesel to
1171 work ergonomically. [RFC 1681].
1172 * [Tuple structs may be empty. Unary and empty tuple structs may be instantiated
1173 with curly braces][36868]. Part of [RFC 1506].
1174 * [A number of minor changes to name resolution have been activated][37127].
1175 They add up to more consistent semantics, allowing for future evolution of
1176 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
1177 details of what is different. The breaking changes here have been transitioned
1178 through the [`legacy_imports`] lint since 1.14, with no known regressions.
1179 * [In `macro_rules`, `path` fragments can now be parsed as type parameter
1181 * [`?Sized` can be used in `where` clauses][37791]
1182 * [There is now a limit on the size of monomorphized types and it can be
1183 modified with the `#![type_size_limit]` crate attribute, similarly to
1184 the `#![recursion_limit]` attribute][37789]
1189 * [On Windows, the compiler will apply dllimport attributes when linking to
1190 extern functions][37973]. Additional attributes and flags can control which
1191 library kind is linked and its name. [RFC 1717].
1192 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
1193 * [The `--test` flag works with procedural macro crates][38107]
1194 * [Fix `extern "aapcs" fn` ABI][37814]
1195 * [The `-C no-stack-check` flag is deprecated][37636]. It does nothing.
1196 * [The `format!` expander recognizes incorrect `printf` and shell-style
1197 formatting directives and suggests the correct format][37613].
1198 * [Only report one error for all unused imports in an import list][37456]
1200 Compiler Performance
1201 --------------------
1203 * [Avoid unnecessary `mk_ty` calls in `Ty::super_fold_with`][37705]
1204 * [Avoid more unnecessary `mk_ty` calls in `Ty::super_fold_with`][37979]
1205 * [Don't clone in `UnificationTable::probe`][37848]
1206 * [Remove `scope_auxiliary` to cut RSS by 10%][37764]
1207 * [Use small vectors in type walker][37760]
1208 * [Macro expansion performance was improved][37701]
1209 * [Change `HirVec<P<T>>` to `HirVec<T>` in `hir::Expr`][37642]
1210 * [Replace FNV with a faster hash function][37229]
1215 * [`std::iter::Iterator::min_by`]
1216 * [`std::iter::Iterator::max_by`]
1217 * [`std::os::*::fs::FileExt`]
1218 * [`std::sync::atomic::Atomic*::get_mut`]
1219 * [`std::sync::atomic::Atomic*::into_inner`]
1220 * [`std::vec::IntoIter::as_slice`]
1221 * [`std::vec::IntoIter::as_mut_slice`]
1222 * [`std::sync::mpsc::Receiver::try_iter`]
1223 * [`std::os::unix::process::CommandExt::before_exec`]
1224 * [`std::rc::Rc::strong_count`]
1225 * [`std::rc::Rc::weak_count`]
1226 * [`std::sync::Arc::strong_count`]
1227 * [`std::sync::Arc::weak_count`]
1228 * [`std::char::encode_utf8`]
1229 * [`std::char::encode_utf16`]
1230 * [`std::cell::Ref::clone`]
1231 * [`std::io::Take::into_inner`]
1236 * [The standard sorting algorithm has been rewritten for dramatic performance
1237 improvements][38192]. It is a hybrid merge sort, drawing influences from
1238 Timsort. Previously it was a naive merge sort.
1239 * [`Iterator::nth` no longer has a `Sized` bound][38134]
1240 * [`Extend<&T>` is specialized for `Vec` where `T: Copy`][38182] to improve
1242 * [`chars().count()` is much faster][37888] and so are [`chars().last()`
1243 and `char_indices().last()`][37882]
1244 * [Fix ARM Objective-C ABI in `std::env::args`][38146]
1245 * [Chinese characters display correctly in `fmt::Debug`][37855]
1246 * [Derive `Default` for `Duration`][37699]
1247 * [Support creation of anonymous pipes on WinXP/2k][37677]
1248 * [`mpsc::RecvTimeoutError` implements `Error`][37527]
1249 * [Don't pass overlapped handles to processes][38835]
1254 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
1255 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
1256 should instead check the variable at runtime with `std::env`. That the value
1257 was set at build time was a bug, and incorrect when cross-compiling. This
1258 change is known to cause breakage.
1259 * [Add `--all` flag to `cargo test`][cargo/3221]
1260 * [Compile statically against the MSVC CRT][cargo/3363]
1261 * [Mix feature flags into fingerprint/metadata shorthash][cargo/3102]
1262 * [Link OpenSSL statically on OSX][cargo/3311]
1263 * [Apply new fingerprinting to build dir outputs][cargo/3310]
1264 * [Test for bad path overrides with summaries][cargo/3336]
1265 * [Require `cargo install --vers` to take a semver version][cargo/3338]
1266 * [Fix retrying crate downloads for network errors][cargo/3348]
1267 * [Implement string lookup for `build.rustflags` config key][cargo/3356]
1268 * [Emit more info on --message-format=json][cargo/3319]
1269 * [Assume `build.rs` in the same directory as `Cargo.toml` is a build script][cargo/3361]
1270 * [Don't ignore errors in workspace manifest][cargo/3409]
1271 * [Fix `--message-format JSON` when rustc emits non-JSON warnings][cargo/3410]
1276 * [Test runners (binaries built with `--test`) now support a `--list` argument
1277 that lists the tests it contains][38185]
1278 * [Test runners now support a `--exact` argument that makes the test filter
1279 match exactly, instead of matching only a substring of the test name][38181]
1280 * [rustdoc supports a `--playground-url` flag][37763]
1281 * [rustdoc provides more details about `#[should_panic]` errors][37749]
1286 * [The Rust build system is now written in Rust][37817]. The Makefiles may
1287 continue to be used in this release by passing `--disable-rustbuild` to the
1288 configure script, but they will be deleted soon. Note that the new build
1289 system uses a different on-disk layout that will likely affect any scripts
1291 * [Rust supports i686-unknown-openbsd][38086]. Tier 3 support. No testing or
1293 * [Rust supports the MSP430][37627]. Tier 3 support. No testing or releases.
1294 * [Rust supports the ARMv5TE architecture][37615]. Tier 3 support. No testing or
1300 * [A number of minor changes to name resolution have been activated][37127].
1301 They add up to more consistent semantics, allowing for future evolution of
1302 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
1303 details of what is different. The breaking changes here have been transitioned
1304 through the [`legacy_imports`] lint since 1.14, with no known regressions.
1305 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
1306 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
1307 should instead check the variable at runtime with `std::env`. That the value
1308 was set at build time was a bug, and incorrect when cross-compiling. This
1309 change is known to cause breakage.
1310 * [Higher-ranked lifetimes are no longer allowed to appear _only_ in associated
1311 types][33685]. The [`hr_lifetime_in_assoc_type` lint] has been a warning since
1312 1.10 and is now an error by default. It will become a hard error in the near
1314 * [The semantics relating modules to file system directories are changing in
1315 minor ways][37602]. This is captured in the new `legacy_directory_ownership`
1316 lint, which is a warning in this release, and will become a hard error in the
1318 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
1319 * [Once `Peekable` peeks a `None` it will return that `None` without re-querying
1320 the underlying iterator][37834]
1322 ["changes"]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md#changes-to-name-resolution-rules
1323 [33685]: https://github.com/rust-lang/rust/issues/33685
1324 [36868]: https://github.com/rust-lang/rust/pull/36868
1325 [37127]: https://github.com/rust-lang/rust/pull/37127
1326 [37229]: https://github.com/rust-lang/rust/pull/37229
1327 [37456]: https://github.com/rust-lang/rust/pull/37456
1328 [37527]: https://github.com/rust-lang/rust/pull/37527
1329 [37602]: https://github.com/rust-lang/rust/pull/37602
1330 [37613]: https://github.com/rust-lang/rust/pull/37613
1331 [37615]: https://github.com/rust-lang/rust/pull/37615
1332 [37636]: https://github.com/rust-lang/rust/pull/37636
1333 [37627]: https://github.com/rust-lang/rust/pull/37627
1334 [37642]: https://github.com/rust-lang/rust/pull/37642
1335 [37677]: https://github.com/rust-lang/rust/pull/37677
1336 [37699]: https://github.com/rust-lang/rust/pull/37699
1337 [37701]: https://github.com/rust-lang/rust/pull/37701
1338 [37705]: https://github.com/rust-lang/rust/pull/37705
1339 [37749]: https://github.com/rust-lang/rust/pull/37749
1340 [37760]: https://github.com/rust-lang/rust/pull/37760
1341 [37763]: https://github.com/rust-lang/rust/pull/37763
1342 [37764]: https://github.com/rust-lang/rust/pull/37764
1343 [37789]: https://github.com/rust-lang/rust/pull/37789
1344 [37791]: https://github.com/rust-lang/rust/pull/37791
1345 [37814]: https://github.com/rust-lang/rust/pull/37814
1346 [37817]: https://github.com/rust-lang/rust/pull/37817
1347 [37834]: https://github.com/rust-lang/rust/pull/37834
1348 [37848]: https://github.com/rust-lang/rust/pull/37848
1349 [37855]: https://github.com/rust-lang/rust/pull/37855
1350 [37882]: https://github.com/rust-lang/rust/pull/37882
1351 [37888]: https://github.com/rust-lang/rust/pull/37888
1352 [37973]: https://github.com/rust-lang/rust/pull/37973
1353 [37979]: https://github.com/rust-lang/rust/pull/37979
1354 [38086]: https://github.com/rust-lang/rust/pull/38086
1355 [38107]: https://github.com/rust-lang/rust/pull/38107
1356 [38117]: https://github.com/rust-lang/rust/pull/38117
1357 [38134]: https://github.com/rust-lang/rust/pull/38134
1358 [38146]: https://github.com/rust-lang/rust/pull/38146
1359 [38181]: https://github.com/rust-lang/rust/pull/38181
1360 [38182]: https://github.com/rust-lang/rust/pull/38182
1361 [38185]: https://github.com/rust-lang/rust/pull/38185
1362 [38192]: https://github.com/rust-lang/rust/pull/38192
1363 [38279]: https://github.com/rust-lang/rust/pull/38279
1364 [38835]: https://github.com/rust-lang/rust/pull/38835
1365 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
1366 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
1367 [RFC 1560]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md
1368 [RFC 1681]: https://github.com/rust-lang/rfcs/blob/master/text/1681-macros-1.1.md
1369 [RFC 1717]: https://github.com/rust-lang/rfcs/blob/master/text/1717-dllimport.md
1370 [`hr_lifetime_in_assoc_type` lint]: https://github.com/rust-lang/rust/issues/33685
1371 [`legacy_imports`]: https://github.com/rust-lang/rust/pull/38271
1372 [cargo/3102]: https://github.com/rust-lang/cargo/pull/3102
1373 [cargo/3221]: https://github.com/rust-lang/cargo/pull/3221
1374 [cargo/3310]: https://github.com/rust-lang/cargo/pull/3310
1375 [cargo/3311]: https://github.com/rust-lang/cargo/pull/3311
1376 [cargo/3319]: https://github.com/rust-lang/cargo/pull/3319
1377 [cargo/3336]: https://github.com/rust-lang/cargo/pull/3336
1378 [cargo/3338]: https://github.com/rust-lang/cargo/pull/3338
1379 [cargo/3348]: https://github.com/rust-lang/cargo/pull/3348
1380 [cargo/3356]: https://github.com/rust-lang/cargo/pull/3356
1381 [cargo/3361]: https://github.com/rust-lang/cargo/pull/3361
1382 [cargo/3363]: https://github.com/rust-lang/cargo/pull/3363
1383 [cargo/3368]: https://github.com/rust-lang/cargo/issues/3368
1384 [cargo/3409]: https://github.com/rust-lang/cargo/pull/3409
1385 [cargo/3410]: https://github.com/rust-lang/cargo/pull/3410
1386 [`std::iter::Iterator::min_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.min_by
1387 [`std::iter::Iterator::max_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.max_by
1388 [`std::os::*::fs::FileExt`]: https://doc.rust-lang.org/std/os/unix/fs/trait.FileExt.html
1389 [`std::sync::atomic::Atomic*::get_mut`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.get_mut
1390 [`std::sync::atomic::Atomic*::into_inner`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.into_inner
1391 [`std::vec::IntoIter::as_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_slice
1392 [`std::vec::IntoIter::as_mut_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_mut_slice
1393 [`std::sync::mpsc::Receiver::try_iter`]: https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.try_iter
1394 [`std::os::unix::process::CommandExt::before_exec`]: https://doc.rust-lang.org/std/os/unix/process/trait.CommandExt.html#tymethod.before_exec
1395 [`std::rc::Rc::strong_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.strong_count
1396 [`std::rc::Rc::weak_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.weak_count
1397 [`std::sync::Arc::strong_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.strong_count
1398 [`std::sync::Arc::weak_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.weak_count
1399 [`std::char::encode_utf8`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf8
1400 [`std::char::encode_utf16`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf16
1401 [`std::cell::Ref::clone`]: https://doc.rust-lang.org/std/cell/struct.Ref.html#method.clone
1402 [`std::io::Take::into_inner`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.into_inner
1405 Version 1.14.0 (2016-12-22)
1406 ===========================
1411 * [`..` matches multiple tuple fields in enum variants, structs
1412 and tuples][36843]. [RFC 1492].
1413 * [Safe `fn` items can be coerced to `unsafe fn` pointers][37389]
1414 * [`use *` and `use ::*` both glob-import from the crate root][37367]
1415 * [It's now possible to call a `Vec<Box<Fn()>>` without explicit
1416 dereferencing][36822]
1421 * [Mark enums with non-zero discriminant as non-zero][37224]
1422 * [Lower-case `static mut` names are linted like other
1423 statics and consts][37162]
1424 * [Fix ICE on some macros in const integer positions
1425 (e.g. `[u8; m!()]`)][36819]
1426 * [Improve error message and snippet for "did you mean `x`"][36798]
1427 * [Add a panic-strategy field to the target specification][36794]
1428 * [Include LLVM version in `--version --verbose`][37200]
1430 Compile-time Optimizations
1431 --------------------------
1433 * [Improve macro expansion performance][37569]
1434 * [Shrink `Expr_::ExprInlineAsm`][37445]
1435 * [Replace all uses of SHA-256 with BLAKE2b][37439]
1436 * [Reduce the number of bytes hashed by `IchHasher`][37427]
1437 * [Avoid more allocations when compiling html5ever][37373]
1438 * [Use `SmallVector` in `CombineFields::instantiate`][37322]
1439 * [Avoid some allocations in the macro parser][37318]
1440 * [Use a faster deflate setting][37298]
1441 * [Add `ArrayVec` and `AccumulateVec` to reduce heap allocations
1442 during interning of slices][37270]
1443 * [Optimize `write_metadata`][37267]
1444 * [Don't process obligation forest cycles when stalled][37231]
1445 * [Avoid many `CrateConfig` clones][37161]
1446 * [Optimize `Substs::super_fold_with`][37108]
1447 * [Optimize `ObligationForest`'s `NodeState` handling][36993]
1448 * [Speed up `plug_leaks`][36917]
1453 * [`println!()`, with no arguments, prints newline][36825].
1454 Previously, an empty string was required to achieve the same.
1455 * [`Wrapping` impls standard binary and unary operators, as well as
1456 the `Sum` and `Product` iterators][37356]
1457 * [Implement `From<Cow<str>> for String` and `From<Cow<[T]>> for
1459 * [Improve `fold` performance for `chain`, `cloned`, `map`, and
1460 `VecDeque` iterators][37315]
1461 * [Improve `SipHasher` performance on small values][37312]
1462 * [Add Iterator trait TrustedLen to enable better FromIterator /
1464 * [Expand `.zip()` specialization to `.map()` and `.cloned()`][37230]
1465 * [`ReadDir` implements `Debug`][37221]
1466 * [Implement `RefUnwindSafe` for atomic types][37178]
1467 * [Specialize `Vec::extend` to `Vec::extend_from_slice`][37094]
1468 * [Avoid allocations in `Decoder::read_str`][37064]
1469 * [`io::Error` implements `From<io::ErrorKind>`][37037]
1470 * [Impl `Debug` for raw pointers to unsized data][36880]
1471 * [Don't reuse `HashMap` random seeds][37470]
1472 * [The internal memory layout of `HashMap` is more cache-friendly, for
1473 significant improvements in some operations][36692]
1474 * [`HashMap` uses less memory on 32-bit architectures][36595]
1475 * [Impl `Add<{str, Cow<str>}>` for `Cow<str>`][36430]
1480 * [Expose rustc cfg values to build scripts][cargo/3243]
1481 * [Allow cargo to work with read-only `CARGO_HOME`][cargo/3259]
1482 * [Fix passing --features when testing multiple packages][cargo/3280]
1483 * [Use a single profile set per workspace][cargo/3249]
1484 * [Load `replace` sections from lock files][cargo/3220]
1485 * [Ignore `panic` configuration for test/bench profiles][cargo/3175]
1490 * [rustup is the recommended Rust installation method][1.14rustup]
1491 * This release includes host (rustc) builds for Linux on MIPS, PowerPC, and
1492 S390x. These are [tier 2] platforms and may have major defects. Follow the
1493 instructions on the website to install, or add the targets to an existing
1494 installation with `rustup target add`. The new target triples are:
1495 - `mips-unknown-linux-gnu`
1496 - `mipsel-unknown-linux-gnu`
1497 - `mips64-unknown-linux-gnuabi64`
1498 - `mips64el-unknown-linux-gnuabi64 `
1499 - `powerpc-unknown-linux-gnu`
1500 - `powerpc64-unknown-linux-gnu`
1501 - `powerpc64le-unknown-linux-gnu`
1502 - `s390x-unknown-linux-gnu `
1503 * This release includes target (std) builds for ARM Linux running MUSL
1504 libc. These are [tier 2] platforms and may have major defects. Add the
1505 following triples to an existing rustup installation with `rustup target add`:
1506 - `arm-unknown-linux-musleabi`
1507 - `arm-unknown-linux-musleabihf`
1508 - `armv7-unknown-linux-musleabihf`
1509 * This release includes [experimental support for WebAssembly][1.14wasm], via
1510 the `wasm32-unknown-emscripten` target. This target is known to have major
1511 defects. Please test, report, and fix.
1512 * rustup no longer installs documentation by default. Run `rustup
1513 component add rust-docs` to install.
1514 * [Fix line stepping in debugger][37310]
1515 * [Enable line number debuginfo in releases][37280]
1520 * [Disable jemalloc on aarch64/powerpc/mips][37392]
1521 * [Add support for Fuchsia OS][37313]
1522 * [Detect local-rebuild by only MAJOR.MINOR version][37273]
1527 * [A number of forward-compatibility lints used by the compiler
1528 to gradually introduce language changes have been converted
1529 to deny by default][36894]:
1530 - ["use of inaccessible extern crate erroneously allowed"][36886]
1531 - ["type parameter default erroneously allowed in invalid location"][36887]
1532 - ["detects super or self keywords at the beginning of global path"][36888]
1533 - ["two overlapping inherent impls define an item with the same name
1534 were erroneously allowed"][36889]
1535 - ["floating-point constants cannot be used in patterns"][36890]
1536 - ["constants of struct or enum type can only be used in a pattern if
1537 the struct or enum has `#[derive(PartialEq, Eq)]`"][36891]
1538 - ["lifetimes or labels named `'_` were erroneously allowed"][36892]
1539 * [Prohibit patterns in trait methods without bodies][37378]
1540 * [The atomic `Ordering` enum may not be matched exhaustively][37351]
1541 * [Future-proofing `#[no_link]` breaks some obscure cases][37247]
1542 * [The `$crate` macro variable is accepted in fewer locations][37213]
1543 * [Impls specifying extra region requirements beyond the trait
1544 they implement are rejected][37167]
1545 * [Enums may not be unsized][37111]. Unsized enums are intended to
1546 work but never have. For now they are forbidden.
1547 * [Enforce the shadowing restrictions from RFC 1560 for today's macros][36767]
1549 [tier 2]: https://forge.rust-lang.org/platform-support.html
1550 [1.14rustup]: https://internals.rust-lang.org/t/beta-testing-rustup-rs/3316/204
1551 [1.14wasm]: https://users.rust-lang.org/t/compiling-to-the-web-with-rust-and-emscripten/7627
1552 [36430]: https://github.com/rust-lang/rust/pull/36430
1553 [36595]: https://github.com/rust-lang/rust/pull/36595
1554 [36595]: https://github.com/rust-lang/rust/pull/36595
1555 [36692]: https://github.com/rust-lang/rust/pull/36692
1556 [36767]: https://github.com/rust-lang/rust/pull/36767
1557 [36794]: https://github.com/rust-lang/rust/pull/36794
1558 [36798]: https://github.com/rust-lang/rust/pull/36798
1559 [36819]: https://github.com/rust-lang/rust/pull/36819
1560 [36822]: https://github.com/rust-lang/rust/pull/36822
1561 [36825]: https://github.com/rust-lang/rust/pull/36825
1562 [36843]: https://github.com/rust-lang/rust/pull/36843
1563 [36880]: https://github.com/rust-lang/rust/pull/36880
1564 [36886]: https://github.com/rust-lang/rust/issues/36886
1565 [36887]: https://github.com/rust-lang/rust/issues/36887
1566 [36888]: https://github.com/rust-lang/rust/issues/36888
1567 [36889]: https://github.com/rust-lang/rust/issues/36889
1568 [36890]: https://github.com/rust-lang/rust/issues/36890
1569 [36891]: https://github.com/rust-lang/rust/issues/36891
1570 [36892]: https://github.com/rust-lang/rust/issues/36892
1571 [36894]: https://github.com/rust-lang/rust/pull/36894
1572 [36917]: https://github.com/rust-lang/rust/pull/36917
1573 [36993]: https://github.com/rust-lang/rust/pull/36993
1574 [37037]: https://github.com/rust-lang/rust/pull/37037
1575 [37064]: https://github.com/rust-lang/rust/pull/37064
1576 [37094]: https://github.com/rust-lang/rust/pull/37094
1577 [37108]: https://github.com/rust-lang/rust/pull/37108
1578 [37111]: https://github.com/rust-lang/rust/pull/37111
1579 [37161]: https://github.com/rust-lang/rust/pull/37161
1580 [37162]: https://github.com/rust-lang/rust/pull/37162
1581 [37167]: https://github.com/rust-lang/rust/pull/37167
1582 [37178]: https://github.com/rust-lang/rust/pull/37178
1583 [37200]: https://github.com/rust-lang/rust/pull/37200
1584 [37213]: https://github.com/rust-lang/rust/pull/37213
1585 [37221]: https://github.com/rust-lang/rust/pull/37221
1586 [37224]: https://github.com/rust-lang/rust/pull/37224
1587 [37230]: https://github.com/rust-lang/rust/pull/37230
1588 [37231]: https://github.com/rust-lang/rust/pull/37231
1589 [37247]: https://github.com/rust-lang/rust/pull/37247
1590 [37267]: https://github.com/rust-lang/rust/pull/37267
1591 [37270]: https://github.com/rust-lang/rust/pull/37270
1592 [37273]: https://github.com/rust-lang/rust/pull/37273
1593 [37280]: https://github.com/rust-lang/rust/pull/37280
1594 [37298]: https://github.com/rust-lang/rust/pull/37298
1595 [37306]: https://github.com/rust-lang/rust/pull/37306
1596 [37310]: https://github.com/rust-lang/rust/pull/37310
1597 [37312]: https://github.com/rust-lang/rust/pull/37312
1598 [37313]: https://github.com/rust-lang/rust/pull/37313
1599 [37315]: https://github.com/rust-lang/rust/pull/37315
1600 [37318]: https://github.com/rust-lang/rust/pull/37318
1601 [37322]: https://github.com/rust-lang/rust/pull/37322
1602 [37326]: https://github.com/rust-lang/rust/pull/37326
1603 [37351]: https://github.com/rust-lang/rust/pull/37351
1604 [37356]: https://github.com/rust-lang/rust/pull/37356
1605 [37367]: https://github.com/rust-lang/rust/pull/37367
1606 [37373]: https://github.com/rust-lang/rust/pull/37373
1607 [37378]: https://github.com/rust-lang/rust/pull/37378
1608 [37389]: https://github.com/rust-lang/rust/pull/37389
1609 [37392]: https://github.com/rust-lang/rust/pull/37392
1610 [37427]: https://github.com/rust-lang/rust/pull/37427
1611 [37439]: https://github.com/rust-lang/rust/pull/37439
1612 [37445]: https://github.com/rust-lang/rust/pull/37445
1613 [37470]: https://github.com/rust-lang/rust/pull/37470
1614 [37569]: https://github.com/rust-lang/rust/pull/37569
1615 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
1616 [cargo/3175]: https://github.com/rust-lang/cargo/pull/3175
1617 [cargo/3220]: https://github.com/rust-lang/cargo/pull/3220
1618 [cargo/3243]: https://github.com/rust-lang/cargo/pull/3243
1619 [cargo/3249]: https://github.com/rust-lang/cargo/pull/3249
1620 [cargo/3259]: https://github.com/rust-lang/cargo/pull/3259
1621 [cargo/3280]: https://github.com/rust-lang/cargo/pull/3280
1624 Version 1.13.0 (2016-11-10)
1625 ===========================
1630 * [Stabilize the `?` operator][36995]. `?` is a simple way to propagate
1631 errors, like the `try!` macro, described in [RFC 0243].
1632 * [Stabilize macros in type position][36014]. Described in [RFC 873].
1633 * [Stabilize attributes on statements][36995]. Described in [RFC 0016].
1634 * [Fix `#[derive]` for empty tuple structs/variants][35728]
1635 * [Fix lifetime rules for 'if' conditions][36029]
1636 * [Avoid loading and parsing unconfigured non-inline modules][36482]
1641 * [Add the `-C link-arg` argument][36574]
1642 * [Remove the old AST-based backend from rustc_trans][35764]
1643 * [Don't enable NEON by default on armv7 Linux][35814]
1644 * [Fix debug line number info for macro expansions][35238]
1645 * [Do not emit "class method" debuginfo for types that are not
1646 DICompositeType][36008]
1647 * [Warn about multiple conflicting #[repr] hints][34623]
1648 * [When sizing DST, don't double-count nested struct prefixes][36351]
1649 * [Default RUST_MIN_STACK to 16MiB for now][36505]
1650 * [Improve rlib metadata format][36551]. Reduces rlib size significantly.
1651 * [Reject macros with empty repetitions to avoid infinite loop][36721]
1652 * [Expand macros without recursing to avoid stack overflows][36214]
1657 * [Replace macro backtraces with labeled local uses][35702]
1658 * [Improve error message for misplaced doc comments][33922]
1659 * [Buffer unix and lock windows to prevent message interleaving][35975]
1660 * [Update lifetime errors to specifically note temporaries][36171]
1661 * [Special case a few colors for Windows][36178]
1662 * [Suggest `use self` when such an import resolves][36289]
1663 * [Be more specific when type parameter shadows primitive type][36338]
1664 * Many minor improvements
1666 Compile-time Optimizations
1667 --------------------------
1669 * [Compute and cache HIR hashes at beginning][35854]
1670 * [Don't hash types in loan paths][36004]
1671 * [Cache projections in trans][35761]
1672 * [Optimize the parser's last token handling][36527]
1673 * [Only instantiate #[inline] functions in codegen units referencing
1674 them][36524]. This leads to big improvements in cases where crates export
1675 define many inline functions without using them directly.
1676 * [Lazily allocate TypedArena's first chunk][36592]
1677 * [Don't allocate during default HashSet creation][36734]
1684 * [`overflowing_abs`]
1685 * [`RefCell::try_borrow`]
1686 * [`RefCell::try_borrow_mut`]
1691 * [Add `assert_ne!` and `debug_assert_ne!`][35074]
1692 * [Make `vec_deque::Drain`, `hash_map::Drain`, and `hash_set::Drain`
1694 * [Implement `AsRef<[T]>` for `std::slice::Iter`][35559]
1695 * [Implement `Debug` for `std::vec::IntoIter`][35707]
1696 * [`CString`: avoid excessive growth just to 0-terminate][35871]
1697 * [Implement `CoerceUnsized` for `{Cell, RefCell, UnsafeCell}`][35627]
1698 * [Use arc4rand on FreeBSD][35884]
1699 * [memrchr: Correct aligned offset computation][35969]
1700 * [Improve Demangling of Rust Symbols][36059]
1701 * [Use monotonic time in condition variables][35048]
1702 * [Implement `Debug` for `std::path::{Components,Iter}`][36101]
1703 * [Implement conversion traits for `char`][35755]
1704 * [Fix illegal instruction caused by overflow in channel cloning][36104]
1705 * [Zero first byte of CString on drop][36264]
1706 * [Inherit overflow checks for sum and product][36372]
1707 * [Add missing Eq implementations][36423]
1708 * [Implement `Debug` for `DirEntry`][36631]
1709 * [When `getaddrinfo` returns `EAI_SYSTEM` retrieve actual error from
1711 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
1712 * [Implement more traits for `std::io::ErrorKind`][35911]
1713 * [Optimize BinaryHeap bounds checking][36072]
1714 * [Work around pointer aliasing issue in `Vec::extend_from_slice`,
1715 `extend_with_element`][36355]
1716 * [Fix overflow checking in unsigned pow()][34942]
1721 * This release includes security fixes to both curl and OpenSSL.
1722 * [Fix transitive doctests when panic=abort][cargo/3021]
1723 * [Add --all-features flag to cargo][cargo/3038]
1724 * [Reject path-based dependencies in `cargo package`][cargo/3060]
1725 * [Don't parse the home directory more than once][cargo/3078]
1726 * [Don't try to generate Cargo.lock on empty workspaces][cargo/3092]
1727 * [Update OpenSSL to 1.0.2j][cargo/3121]
1728 * [Add license and license_file to cargo metadata output][cargo/3110]
1729 * [Make crates-io registry URL optional in config; ignore all changes to
1730 source.crates-io][cargo/3089]
1731 * [Don't download dependencies from other platforms][cargo/3123]
1732 * [Build transitive dev-dependencies when needed][cargo/3125]
1733 * [Add support for per-target rustflags in .cargo/config][cargo/3157]
1734 * [Avoid updating registry when adding existing deps][cargo/3144]
1735 * [Warn about path overrides that won't work][cargo/3136]
1736 * [Use workspaces during `cargo install`][cargo/3146]
1737 * [Leak mspdbsrv.exe processes on Windows][cargo/3162]
1738 * [Add --message-format flag][cargo/3000]
1739 * [Pass target environment for rustdoc][cargo/3205]
1740 * [Use `CommandExt::exec` for `cargo run` on Unix][cargo/2818]
1741 * [Update curl and curl-sys][cargo/3241]
1742 * [Call rustdoc test with the correct cfg flags of a package][cargo/3242]
1747 * [rustdoc: Add the `--sysroot` argument][36586]
1748 * [rustdoc: Fix a couple of issues with the search results][35655]
1749 * [rustdoc: remove the `!` from macro URLs and titles][35234]
1750 * [gdb: Fix pretty-printing special-cased Rust types][35585]
1751 * [rustdoc: Filter more incorrect methods inherited through Deref][36266]
1756 * [Remove unmaintained style guide][35124]
1757 * [Add s390x support][36369]
1758 * [Initial work at Haiku OS support][36727]
1759 * [Add mips-uclibc targets][35734]
1760 * [Crate-ify compiler-rt into compiler-builtins][35021]
1761 * [Add rustc version info (git hash + date) to dist tarball][36213]
1762 * Many documentation improvements
1767 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
1768 * [Deny (by default) transmuting from fn item types to pointer-sized
1769 types][34923]. Continuing the long transition to zero-sized fn items,
1771 * [Fix `#[derive]` for empty tuple structs/variants][35728].
1773 * [Issue deprecation warnings for safe accesses to extern statics][36173]
1774 * [Fix lifetime rules for 'if' conditions][36029].
1775 * [Inherit overflow checks for sum and product][36372].
1776 * [Forbid user-defined macros named "macro_rules"][36730].
1778 [33922]: https://github.com/rust-lang/rust/pull/33922
1779 [34623]: https://github.com/rust-lang/rust/pull/34623
1780 [34923]: https://github.com/rust-lang/rust/pull/34923
1781 [34942]: https://github.com/rust-lang/rust/pull/34942
1782 [34982]: https://github.com/rust-lang/rust/pull/34982
1783 [35021]: https://github.com/rust-lang/rust/pull/35021
1784 [35048]: https://github.com/rust-lang/rust/pull/35048
1785 [35074]: https://github.com/rust-lang/rust/pull/35074
1786 [35124]: https://github.com/rust-lang/rust/pull/35124
1787 [35234]: https://github.com/rust-lang/rust/pull/35234
1788 [35238]: https://github.com/rust-lang/rust/pull/35238
1789 [35354]: https://github.com/rust-lang/rust/pull/35354
1790 [35559]: https://github.com/rust-lang/rust/pull/35559
1791 [35585]: https://github.com/rust-lang/rust/pull/35585
1792 [35627]: https://github.com/rust-lang/rust/pull/35627
1793 [35655]: https://github.com/rust-lang/rust/pull/35655
1794 [35702]: https://github.com/rust-lang/rust/pull/35702
1795 [35707]: https://github.com/rust-lang/rust/pull/35707
1796 [35728]: https://github.com/rust-lang/rust/pull/35728
1797 [35734]: https://github.com/rust-lang/rust/pull/35734
1798 [35755]: https://github.com/rust-lang/rust/pull/35755
1799 [35761]: https://github.com/rust-lang/rust/pull/35761
1800 [35764]: https://github.com/rust-lang/rust/pull/35764
1801 [35814]: https://github.com/rust-lang/rust/pull/35814
1802 [35854]: https://github.com/rust-lang/rust/pull/35854
1803 [35871]: https://github.com/rust-lang/rust/pull/35871
1804 [35884]: https://github.com/rust-lang/rust/pull/35884
1805 [35911]: https://github.com/rust-lang/rust/pull/35911
1806 [35969]: https://github.com/rust-lang/rust/pull/35969
1807 [35975]: https://github.com/rust-lang/rust/pull/35975
1808 [36004]: https://github.com/rust-lang/rust/pull/36004
1809 [36008]: https://github.com/rust-lang/rust/pull/36008
1810 [36014]: https://github.com/rust-lang/rust/pull/36014
1811 [36029]: https://github.com/rust-lang/rust/pull/36029
1812 [36059]: https://github.com/rust-lang/rust/pull/36059
1813 [36072]: https://github.com/rust-lang/rust/pull/36072
1814 [36101]: https://github.com/rust-lang/rust/pull/36101
1815 [36104]: https://github.com/rust-lang/rust/pull/36104
1816 [36171]: https://github.com/rust-lang/rust/pull/36171
1817 [36173]: https://github.com/rust-lang/rust/pull/36173
1818 [36178]: https://github.com/rust-lang/rust/pull/36178
1819 [36213]: https://github.com/rust-lang/rust/pull/36213
1820 [36214]: https://github.com/rust-lang/rust/pull/36214
1821 [36264]: https://github.com/rust-lang/rust/pull/36264
1822 [36266]: https://github.com/rust-lang/rust/pull/36266
1823 [36289]: https://github.com/rust-lang/rust/pull/36289
1824 [36338]: https://github.com/rust-lang/rust/pull/36338
1825 [36351]: https://github.com/rust-lang/rust/pull/36351
1826 [36355]: https://github.com/rust-lang/rust/pull/36355
1827 [36369]: https://github.com/rust-lang/rust/pull/36369
1828 [36372]: https://github.com/rust-lang/rust/pull/36372
1829 [36423]: https://github.com/rust-lang/rust/pull/36423
1830 [36482]: https://github.com/rust-lang/rust/pull/36482
1831 [36505]: https://github.com/rust-lang/rust/pull/36505
1832 [36524]: https://github.com/rust-lang/rust/pull/36524
1833 [36527]: https://github.com/rust-lang/rust/pull/36527
1834 [36551]: https://github.com/rust-lang/rust/pull/36551
1835 [36574]: https://github.com/rust-lang/rust/pull/36574
1836 [36586]: https://github.com/rust-lang/rust/pull/36586
1837 [36592]: https://github.com/rust-lang/rust/pull/36592
1838 [36631]: https://github.com/rust-lang/rust/pull/36631
1839 [36639]: https://github.com/rust-lang/rust/pull/36639
1840 [36721]: https://github.com/rust-lang/rust/pull/36721
1841 [36727]: https://github.com/rust-lang/rust/pull/36727
1842 [36730]: https://github.com/rust-lang/rust/pull/36730
1843 [36734]: https://github.com/rust-lang/rust/pull/36734
1844 [36754]: https://github.com/rust-lang/rust/pull/36754
1845 [36995]: https://github.com/rust-lang/rust/pull/36995
1846 [RFC 0016]: https://github.com/rust-lang/rfcs/blob/master/text/0016-more-attributes.md
1847 [RFC 0243]: https://github.com/rust-lang/rfcs/blob/master/text/0243-trait-based-exception-handling.md
1848 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
1849 [RFC 401]: https://github.com/rust-lang/rfcs/blob/master/text/0401-coercions.md
1850 [RFC 873]: https://github.com/rust-lang/rfcs/blob/master/text/0873-type-macros.md
1851 [cargo/2818]: https://github.com/rust-lang/cargo/pull/2818
1852 [cargo/3000]: https://github.com/rust-lang/cargo/pull/3000
1853 [cargo/3021]: https://github.com/rust-lang/cargo/pull/3021
1854 [cargo/3038]: https://github.com/rust-lang/cargo/pull/3038
1855 [cargo/3060]: https://github.com/rust-lang/cargo/pull/3060
1856 [cargo/3078]: https://github.com/rust-lang/cargo/pull/3078
1857 [cargo/3089]: https://github.com/rust-lang/cargo/pull/3089
1858 [cargo/3092]: https://github.com/rust-lang/cargo/pull/3092
1859 [cargo/3110]: https://github.com/rust-lang/cargo/pull/3110
1860 [cargo/3121]: https://github.com/rust-lang/cargo/pull/3121
1861 [cargo/3123]: https://github.com/rust-lang/cargo/pull/3123
1862 [cargo/3125]: https://github.com/rust-lang/cargo/pull/3125
1863 [cargo/3136]: https://github.com/rust-lang/cargo/pull/3136
1864 [cargo/3144]: https://github.com/rust-lang/cargo/pull/3144
1865 [cargo/3146]: https://github.com/rust-lang/cargo/pull/3146
1866 [cargo/3157]: https://github.com/rust-lang/cargo/pull/3157
1867 [cargo/3162]: https://github.com/rust-lang/cargo/pull/3162
1868 [cargo/3205]: https://github.com/rust-lang/cargo/pull/3205
1869 [cargo/3241]: https://github.com/rust-lang/cargo/pull/3241
1870 [cargo/3242]: https://github.com/rust-lang/cargo/pull/3242
1871 [rustup]: https://www.rustup.rs
1872 [`checked_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.checked_abs
1873 [`wrapping_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.wrapping_abs
1874 [`overflowing_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.overflowing_abs
1875 [`RefCell::try_borrow`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow
1876 [`RefCell::try_borrow_mut`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow_mut
1877 [`SipHasher`]: https://doc.rust-lang.org/std/hash/struct.SipHasher.html
1878 [`DefaultHasher`]: https://doc.rust-lang.org/std/collections/hash_map/struct.DefaultHasher.html
1881 Version 1.12.1 (2016-10-20)
1882 ===========================
1887 * [ICE: 'rustc' panicked at 'assertion failed: concrete_substs.is_normalized_for_trans()' #36381][36381]
1888 * [Confusion with double negation and booleans][36856]
1889 * [rustc 1.12.0 fails with SIGSEGV in release mode (syn crate 0.8.0)][36875]
1890 * [Rustc 1.12.0 Windows build of `ethcore` crate fails with LLVM error][36924]
1891 * [1.12.0: High memory usage when linking in release mode with debug info][36926]
1892 * [Corrupted memory after updated to 1.12][36936]
1893 * ["Let NullaryConstructor = something;" causes internal compiler error: "tried to overwrite interned AdtDef"][37026]
1894 * [Fix ICE: inject bitcast if types mismatch for invokes/calls/stores][37112]
1895 * [debuginfo: Handle spread_arg case in MIR-trans in a more stable way.][37153]
1897 [36381]: https://github.com/rust-lang/rust/issues/36381
1898 [36856]: https://github.com/rust-lang/rust/issues/36856
1899 [36875]: https://github.com/rust-lang/rust/issues/36875
1900 [36924]: https://github.com/rust-lang/rust/issues/36924
1901 [36926]: https://github.com/rust-lang/rust/issues/36926
1902 [36936]: https://github.com/rust-lang/rust/issues/36936
1903 [37026]: https://github.com/rust-lang/rust/issues/37026
1904 [37112]: https://github.com/rust-lang/rust/issues/37112
1905 [37153]: https://github.com/rust-lang/rust/issues/37153
1908 Version 1.12.0 (2016-09-29)
1909 ===========================
1914 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)](https://github.com/rust-lang/rust/pull/34096).
1915 This translation pass is far simpler than the previous AST->LLVM pass, and
1916 creates opportunities to perform new optimizations directly on the MIR. It
1917 was previously described [on the Rust blog](https://blog.rust-lang.org/2016/04/19/MIR.html).
1918 * [`rustc` presents a new, more readable error format, along with
1919 machine-readable JSON error output for use by IDEs](https://github.com/rust-lang/rust/pull/35401).
1920 Most common editors supporting Rust have been updated to work with it. It was
1921 previously described [on the Rust blog](https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
1926 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)](https://github.com/rust-lang/rust/pull/34096).
1927 This translation pass is far simpler than the previous AST->LLVM pass, and
1928 creates opportunities to perform new optimizations directly on the MIR. It
1929 was previously described [on the Rust blog](https://blog.rust-lang.org/2016/04/19/MIR.html).
1930 * [Print the Rust target name, not the LLVM target name, with
1931 `--print target-list`](https://github.com/rust-lang/rust/pull/35489)
1932 * [The computation of `TypeId` is correct in some cases where it was previously
1933 producing inconsistent results](https://github.com/rust-lang/rust/pull/35267)
1934 * [The `mips-unknown-linux-gnu` target uses hardware floating point by default](https://github.com/rust-lang/rust/pull/34910)
1935 * [The `rustc` arguments, `--print target-cpus`, `--print target-features`,
1936 `--print relocation-models`, and `--print code-models` print the available
1937 options to the `-C target-cpu`, `-C target-feature`, `-C relocation-model` and
1938 `-C code-model` code generation arguments](https://github.com/rust-lang/rust/pull/34845)
1939 * [`rustc` supports three new MUSL targets on ARM: `arm-unknown-linux-musleabi`,
1940 `arm-unknown-linux-musleabihf`, and `armv7-unknown-linux-musleabihf`](https://github.com/rust-lang/rust/pull/35060).
1941 These targets produce statically-linked binaries. There are no binary release
1947 * [`rustc` presents a new, more readable error format, along with
1948 machine-readable JSON error output for use by IDEs](https://github.com/rust-lang/rust/pull/35401).
1949 Most common editors supporting Rust have been updated to work with it. It was
1950 previously described [on the Rust blog](https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
1951 * [In error descriptions, references are now described in plain English,
1952 instead of as "&-ptr"](https://github.com/rust-lang/rust/pull/35611)
1953 * [In error type descriptions, unknown numeric types are named `{integer}` or
1954 `{float}` instead of `_`](https://github.com/rust-lang/rust/pull/35080)
1955 * [`rustc` emits a clearer error when inner attributes follow a doc comment](https://github.com/rust-lang/rust/pull/34676)
1960 * [`macro_rules!` invocations can be made within `macro_rules!` invocations](https://github.com/rust-lang/rust/pull/34925)
1961 * [`macro_rules!` meta-variables are hygienic](https://github.com/rust-lang/rust/pull/35453)
1962 * [`macro_rules!` `tt` matchers can be reparsed correctly, making them much more
1963 useful](https://github.com/rust-lang/rust/pull/34908)
1964 * [`macro_rules!` `stmt` matchers correctly consume the entire contents when
1965 inside non-braces invocations](https://github.com/rust-lang/rust/pull/34886)
1966 * [Semicolons are properly required as statement delimiters inside
1967 `macro_rules!` invocations](https://github.com/rust-lang/rust/pull/34660)
1968 * [`cfg_attr` works on `path` attributes](https://github.com/rust-lang/rust/pull/34546)
1973 * [`Cell::as_ptr`](https://doc.rust-lang.org/std/cell/struct.Cell.html#method.as_ptr)
1974 * [`RefCell::as_ptr`](https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.as_ptr)
1975 * [`IpAddr::is_unspecified`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_unspecified)
1976 * [`IpAddr::is_loopback`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_loopback)
1977 * [`IpAddr::is_multicast`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_multicast)
1978 * [`Ipv4Addr::is_unspecified`](https://doc.rust-lang.org/std/net/struct.Ipv4Addr.html#method.is_unspecified)
1979 * [`Ipv6Addr::octets`](https://doc.rust-lang.org/std/net/struct.Ipv6Addr.html#method.octets)
1980 * [`LinkedList::contains`](https://doc.rust-lang.org/std/collections/linked_list/struct.LinkedList.html#method.contains)
1981 * [`VecDeque::contains`](https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.contains)
1982 * [`ExitStatusExt::from_raw`](https://doc.rust-lang.org/std/os/unix/process/trait.ExitStatusExt.html#tymethod.from_raw).
1983 Both on Unix and Windows.
1984 * [`Receiver::recv_timeout`](https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.recv_timeout)
1985 * [`RecvTimeoutError`](https://doc.rust-lang.org/std/sync/mpsc/enum.RecvTimeoutError.html)
1986 * [`BinaryHeap::peek_mut`](https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.peek_mut)
1987 * [`PeekMut`](https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html)
1988 * [`iter::Product`](https://doc.rust-lang.org/std/iter/trait.Product.html)
1989 * [`iter::Sum`](https://doc.rust-lang.org/std/iter/trait.Sum.html)
1990 * [`OccupiedEntry::remove_entry`](https://doc.rust-lang.org/std/collections/btree_map/struct.OccupiedEntry.html#method.remove_entry)
1991 * [`VacantEntry::into_key`](https://doc.rust-lang.org/std/collections/btree_map/struct.VacantEntry.html#method.into_key)
1996 * [The `format!` macro and friends now allow a single argument to be formatted
1997 in multiple styles](https://github.com/rust-lang/rust/pull/33642)
1998 * [The lifetime bounds on `[T]::binary_search_by` and
1999 `[T]::binary_search_by_key` have been adjusted to be more flexible](https://github.com/rust-lang/rust/pull/34762)
2000 * [`Option` implements `From` for its contained type](https://github.com/rust-lang/rust/pull/34828)
2001 * [`Cell`, `RefCell` and `UnsafeCell` implement `From` for their contained type](https://github.com/rust-lang/rust/pull/35392)
2002 * [`RwLock` panics if the reader count overflows](https://github.com/rust-lang/rust/pull/35378)
2003 * [`vec_deque::Drain`, `hash_map::Drain` and `hash_set::Drain` are covariant](https://github.com/rust-lang/rust/pull/35354)
2004 * [`vec::Drain` and `binary_heap::Drain` are covariant](https://github.com/rust-lang/rust/pull/34951)
2005 * [`Cow<str>` implements `FromIterator` for `char`, `&str` and `String`](https://github.com/rust-lang/rust/pull/35064)
2006 * [Sockets on Linux are correctly closed in subprocesses via `SOCK_CLOEXEC`](https://github.com/rust-lang/rust/pull/34946)
2007 * [`hash_map::Entry`, `hash_map::VacantEntry` and `hash_map::OccupiedEntry`
2008 implement `Debug`](https://github.com/rust-lang/rust/pull/34937)
2009 * [`btree_map::Entry`, `btree_map::VacantEntry` and `btree_map::OccupiedEntry`
2010 implement `Debug`](https://github.com/rust-lang/rust/pull/34885)
2011 * [`String` implements `AddAssign`](https://github.com/rust-lang/rust/pull/34890)
2012 * [Variadic `extern fn` pointers implement the `Clone`, `PartialEq`, `Eq`,
2013 `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and `fmt::Debug` traits](https://github.com/rust-lang/rust/pull/34879)
2014 * [`FileType` implements `Debug`](https://github.com/rust-lang/rust/pull/34757)
2015 * [References to `Mutex` and `RwLock` are unwind-safe](https://github.com/rust-lang/rust/pull/34756)
2016 * [`mpsc::sync_channel` `Receiver`s return any available message before
2017 reporting a disconnect](https://github.com/rust-lang/rust/pull/34731)
2018 * [Unicode definitions have been updated to 9.0](https://github.com/rust-lang/rust/pull/34599)
2019 * [`env` iterators implement `DoubleEndedIterator`](https://github.com/rust-lang/rust/pull/33312)
2024 * [Support local mirrors of registries](https://github.com/rust-lang/cargo/pull/2857)
2025 * [Add support for command aliases](https://github.com/rust-lang/cargo/pull/2679)
2026 * [Allow `opt-level="s"` / `opt-level="z"` in profile overrides](https://github.com/rust-lang/cargo/pull/3007)
2027 * [Make `cargo doc --open --target` work as expected](https://github.com/rust-lang/cargo/pull/2988)
2028 * [Speed up noop registry updates](https://github.com/rust-lang/cargo/pull/2974)
2029 * [Update OpenSSL](https://github.com/rust-lang/cargo/pull/2971)
2030 * [Fix `--panic=abort` with plugins](https://github.com/rust-lang/cargo/pull/2954)
2031 * [Always pass `-C metadata` to the compiler](https://github.com/rust-lang/cargo/pull/2946)
2032 * [Fix depending on git repos with workspaces](https://github.com/rust-lang/cargo/pull/2938)
2033 * [Add a `--lib` flag to `cargo new`](https://github.com/rust-lang/cargo/pull/2921)
2034 * [Add `http.cainfo` for custom certs](https://github.com/rust-lang/cargo/pull/2917)
2035 * [Indicate the compilation profile after compiling](https://github.com/rust-lang/cargo/pull/2909)
2036 * [Allow enabling features for dependencies with `--features`](https://github.com/rust-lang/cargo/pull/2876)
2037 * [Add `--jobs` flag to `cargo package`](https://github.com/rust-lang/cargo/pull/2867)
2038 * [Add `--dry-run` to `cargo publish`](https://github.com/rust-lang/cargo/pull/2849)
2039 * [Add support for `RUSTDOCFLAGS`](https://github.com/rust-lang/cargo/pull/2794)
2044 * [`panic::catch_unwind` is more optimized](https://github.com/rust-lang/rust/pull/35444)
2045 * [`panic::catch_unwind` no longer accesses thread-local storage on entry](https://github.com/rust-lang/rust/pull/34866)
2050 * [Test binaries now support a `--test-threads` argument to specify the number
2051 of threads used to run tests, and which acts the same as the
2052 `RUST_TEST_THREADS` environment variable](https://github.com/rust-lang/rust/pull/35414)
2053 * [The test runner now emits a warning when tests run over 60 seconds](https://github.com/rust-lang/rust/pull/35405)
2054 * [rustdoc: Fix methods in search results](https://github.com/rust-lang/rust/pull/34752)
2055 * [`rust-lldb` warns about unsupported versions of LLDB](https://github.com/rust-lang/rust/pull/34646)
2056 * [Rust releases now come with source packages that can be installed by rustup
2057 via `rustup component add rust-src`](https://github.com/rust-lang/rust/pull/34366).
2058 The resulting source code can be used by tools and IDES, located in the
2059 sysroot under `lib/rustlib/src`.
2064 * [The compiler can now be built against LLVM 3.9](https://github.com/rust-lang/rust/pull/35594)
2065 * Many minor improvements to the documentation.
2066 * [The Rust exception handling "personality" routine is now written in Rust](https://github.com/rust-lang/rust/pull/34832)
2071 * [When printing Windows `OsStr`s, unpaired surrogate codepoints are escaped
2072 with the lowercase format instead of the uppercase](https://github.com/rust-lang/rust/pull/35084)
2073 * [When formatting strings, if "precision" is specified, the "fill",
2074 "align" and "width" specifiers are no longer ignored](https://github.com/rust-lang/rust/pull/34544)
2075 * [The `Debug` impl for strings no longer escapes all non-ASCII characters](https://github.com/rust-lang/rust/pull/34485)
2078 Version 1.11.0 (2016-08-18)
2079 ===========================
2084 * [`cfg_attr` works on `path` attributes](https://github.com/rust-lang/rust/pull/34546)
2085 * [Support nested `cfg_attr` attributes](https://github.com/rust-lang/rust/pull/34216)
2086 * [Allow statement-generating braced macro invocations at the end of blocks](https://github.com/rust-lang/rust/pull/34436)
2087 * [Macros can be expanded inside of trait definitions](https://github.com/rust-lang/rust/pull/34213)
2088 * [`#[macro_use]` works properly when it is itself expanded from a macro](https://github.com/rust-lang/rust/pull/34032)
2093 * [`BinaryHeap::append`](https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.append)
2094 * [`BTreeMap::append`](https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.append)
2095 * [`BTreeMap::split_off`](https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.split_off)
2096 * [`BTreeSet::append`](https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.append)
2097 * [`BTreeSet::split_off`](https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.split_off)
2098 * [`f32::to_degrees`](https://doc.rust-lang.org/std/primitive.f32.html#method.to_degrees)
2099 (in libcore - previously stabilized in libstd)
2100 * [`f32::to_radians`](https://doc.rust-lang.org/std/primitive.f32.html#method.to_radians)
2101 (in libcore - previously stabilized in libstd)
2102 * [`f64::to_degrees`](https://doc.rust-lang.org/std/primitive.f64.html#method.to_degrees)
2103 (in libcore - previously stabilized in libstd)
2104 * [`f64::to_radians`](https://doc.rust-lang.org/std/primitive.f64.html#method.to_radians)
2105 (in libcore - previously stabilized in libstd)
2106 * [`Iterator::sum`](https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
2107 * [`Iterator::product`](https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
2108 * [`Cell::get_mut`](https://doc.rust-lang.org/std/cell/struct.Cell.html#method.get_mut)
2109 * [`RefCell::get_mut`](https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.get_mut)
2114 * [The `thread_local!` macro supports multiple definitions in a single
2115 invocation, and can apply attributes](https://github.com/rust-lang/rust/pull/34077)
2116 * [`Cow` implements `Default`](https://github.com/rust-lang/rust/pull/34305)
2117 * [`Wrapping` implements binary, octal, lower-hex and upper-hex
2118 `Display` formatting](https://github.com/rust-lang/rust/pull/34190)
2119 * [The range types implement `Hash`](https://github.com/rust-lang/rust/pull/34180)
2120 * [`lookup_host` ignores unknown address types](https://github.com/rust-lang/rust/pull/34067)
2121 * [`assert_eq!` accepts a custom error message, like `assert!` does](https://github.com/rust-lang/rust/pull/33976)
2122 * [The main thread is now called "main" instead of "<main>"](https://github.com/rust-lang/rust/pull/33803)
2127 * [Disallow specifying features of transitive deps](https://github.com/rust-lang/cargo/pull/2821)
2128 * [Add color support for Windows consoles](https://github.com/rust-lang/cargo/pull/2804)
2129 * [Fix `harness = false` on `[lib]` sections](https://github.com/rust-lang/cargo/pull/2795)
2130 * [Don't panic when `links` contains a '.'](https://github.com/rust-lang/cargo/pull/2787)
2131 * [Build scripts can emit warnings](https://github.com/rust-lang/cargo/pull/2630),
2132 and `-vv` prints warnings for all crates.
2133 * [Ignore file locks on OS X NFS mounts](https://github.com/rust-lang/cargo/pull/2720)
2134 * [Don't warn about `package.metadata` keys](https://github.com/rust-lang/cargo/pull/2668).
2135 This provides room for expansion by arbitrary tools.
2136 * [Add support for cdylib crate types](https://github.com/rust-lang/cargo/pull/2741)
2137 * [Prevent publishing crates when files are dirty](https://github.com/rust-lang/cargo/pull/2781)
2138 * [Don't fetch all crates on clean](https://github.com/rust-lang/cargo/pull/2704)
2139 * [Propagate --color option to rustc](https://github.com/rust-lang/cargo/pull/2779)
2140 * [Fix `cargo doc --open` on Windows](https://github.com/rust-lang/cargo/pull/2780)
2141 * [Improve autocompletion](https://github.com/rust-lang/cargo/pull/2772)
2142 * [Configure colors of stderr as well as stdout](https://github.com/rust-lang/cargo/pull/2739)
2147 * [Caching projections speeds up type check dramatically for some
2148 workloads](https://github.com/rust-lang/rust/pull/33816)
2149 * [The default `HashMap` hasher is SipHash 1-3 instead of SipHash 2-4](https://github.com/rust-lang/rust/pull/33940)
2150 This hasher is faster, but is believed to provide sufficient
2151 protection from collision attacks.
2152 * [Comparison of `Ipv4Addr` is 10x faster](https://github.com/rust-lang/rust/pull/33891)
2157 * [Fix empty implementation section on some module pages](https://github.com/rust-lang/rust/pull/34536)
2158 * [Fix inlined renamed reexports in import lists](https://github.com/rust-lang/rust/pull/34479)
2159 * [Fix search result layout for enum variants and struct fields](https://github.com/rust-lang/rust/pull/34477)
2160 * [Fix issues with source links to external crates](https://github.com/rust-lang/rust/pull/34387)
2161 * [Fix redirect pages for renamed reexports](https://github.com/rust-lang/rust/pull/34245)
2166 * [rustc is better at finding the MSVC toolchain](https://github.com/rust-lang/rust/pull/34492)
2167 * [When emitting debug info, rustc emits frame pointers for closures,
2168 shims and glue, as it does for all other functions](https://github.com/rust-lang/rust/pull/33909)
2169 * [rust-lldb warns about unsupported versions of LLDB](https://github.com/rust-lang/rust/pull/34646)
2170 * Many more errors have been given error codes and extended
2172 * API documentation continues to be improved, with many new examples
2177 * [rustc no longer hangs when dependencies recursively re-export
2178 submodules](https://github.com/rust-lang/rust/pull/34542)
2179 * [rustc requires LLVM 3.7+](https://github.com/rust-lang/rust/pull/34104)
2180 * [The 'How Safe and Unsafe Interact' chapter of The Rustonomicon was
2181 rewritten](https://github.com/rust-lang/rust/pull/33895)
2182 * [rustc support 16-bit pointer sizes](https://github.com/rust-lang/rust/pull/33460).
2183 No targets use this yet, but it works toward AVR support.
2188 * [`const`s and `static`s may not have unsized types](https://github.com/rust-lang/rust/pull/34443)
2189 * [The new follow-set rules that place restrictions on `macro_rules!`
2190 in order to ensure syntax forward-compatibility have been enabled](https://github.com/rust-lang/rust/pull/33982)
2191 This was an [amendment to RFC 550](https://github.com/rust-lang/rfcs/pull/1384),
2192 and has been a warning since 1.10.
2193 * [`cfg` attribute process has been refactored to fix various bugs](https://github.com/rust-lang/rust/pull/33706).
2194 This causes breakage in some corner cases.
2197 Version 1.10.0 (2016-07-07)
2198 ===========================
2203 * [Allow `concat_idents!` in type positions as well as in expression
2204 positions](https://github.com/rust-lang/rust/pull/33735).
2205 * [`Copy` types are required to have a trivial implementation of `Clone`](https://github.com/rust-lang/rust/pull/33420).
2206 [RFC 1521](https://github.com/rust-lang/rfcs/blob/master/text/1521-copy-clone-semantics.md).
2207 * [Single-variant enums support the `#[repr(..)]` attribute](https://github.com/rust-lang/rust/pull/33355).
2208 * [Fix `#[derive(RustcEncodable)]` in the presence of other `encode` methods](https://github.com/rust-lang/rust/pull/32908).
2209 * [`panic!` can be converted to a runtime abort with the
2210 `-C panic=abort` flag](https://github.com/rust-lang/rust/pull/32900).
2211 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
2212 * [Add a new crate type, 'cdylib'](https://github.com/rust-lang/rust/pull/33553).
2213 cdylibs are dynamic libraries suitable for loading by non-Rust hosts.
2214 [RFC 1510](https://github.com/rust-lang/rfcs/blob/master/text/1510-rdylib.md).
2215 Note that Cargo does not yet directly support cdylibs.
2220 * `os::windows::fs::OpenOptionsExt::access_mode`
2221 * `os::windows::fs::OpenOptionsExt::share_mode`
2222 * `os::windows::fs::OpenOptionsExt::custom_flags`
2223 * `os::windows::fs::OpenOptionsExt::attributes`
2224 * `os::windows::fs::OpenOptionsExt::security_qos_flags`
2225 * `os::unix::fs::OpenOptionsExt::custom_flags`
2226 * [`sync::Weak::new`](http://doc.rust-lang.org/alloc/arc/struct.Weak.html#method.new)
2227 * `Default for sync::Weak`
2228 * [`panic::set_hook`](http://doc.rust-lang.org/std/panic/fn.set_hook.html)
2229 * [`panic::take_hook`](http://doc.rust-lang.org/std/panic/fn.take_hook.html)
2230 * [`panic::PanicInfo`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html)
2231 * [`panic::PanicInfo::payload`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.payload)
2232 * [`panic::PanicInfo::location`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.location)
2233 * [`panic::Location`](http://doc.rust-lang.org/std/panic/struct.Location.html)
2234 * [`panic::Location::file`](http://doc.rust-lang.org/std/panic/struct.Location.html#method.file)
2235 * [`panic::Location::line`](http://doc.rust-lang.org/std/panic/struct.Location.html#method.line)
2236 * [`ffi::CStr::from_bytes_with_nul`](http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul)
2237 * [`ffi::CStr::from_bytes_with_nul_unchecked`](http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul_unchecked)
2238 * [`ffi::FromBytesWithNulError`](http://doc.rust-lang.org/std/ffi/struct.FromBytesWithNulError.html)
2239 * [`fs::Metadata::modified`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.modified)
2240 * [`fs::Metadata::accessed`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.accessed)
2241 * [`fs::Metadata::created`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.created)
2242 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange`
2243 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange_weak`
2244 * `collections::{btree,hash}_map::{Occupied,Vacant,}Entry::key`
2245 * `os::unix::net::{UnixStream, UnixListener, UnixDatagram, SocketAddr}`
2246 * [`SocketAddr::is_unnamed`](http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.is_unnamed)
2247 * [`SocketAddr::as_pathname`](http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.as_pathname)
2248 * [`UnixStream::connect`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.connect)
2249 * [`UnixStream::pair`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.pair)
2250 * [`UnixStream::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.try_clone)
2251 * [`UnixStream::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.local_addr)
2252 * [`UnixStream::peer_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.peer_addr)
2253 * [`UnixStream::set_read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
2254 * [`UnixStream::set_write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
2255 * [`UnixStream::read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
2256 * [`UnixStream::write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
2257 * [`UnixStream::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.set_nonblocking)
2258 * [`UnixStream::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.take_error)
2259 * [`UnixStream::shutdown`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.shutdown)
2260 * Read/Write/RawFd impls for `UnixStream`
2261 * [`UnixListener::bind`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.bind)
2262 * [`UnixListener::accept`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.accept)
2263 * [`UnixListener::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.try_clone)
2264 * [`UnixListener::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.local_addr)
2265 * [`UnixListener::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.set_nonblocking)
2266 * [`UnixListener::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.take_error)
2267 * [`UnixListener::incoming`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.incoming)
2268 * RawFd impls for `UnixListener`
2269 * [`UnixDatagram::bind`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.bind)
2270 * [`UnixDatagram::unbound`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.unbound)
2271 * [`UnixDatagram::pair`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.pair)
2272 * [`UnixDatagram::connect`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.connect)
2273 * [`UnixDatagram::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.try_clone)
2274 * [`UnixDatagram::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.local_addr)
2275 * [`UnixDatagram::peer_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.peer_addr)
2276 * [`UnixDatagram::recv_from`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv_from)
2277 * [`UnixDatagram::recv`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv)
2278 * [`UnixDatagram::send_to`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send_to)
2279 * [`UnixDatagram::send`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send)
2280 * [`UnixDatagram::set_read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_read_timeout)
2281 * [`UnixDatagram::set_write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_write_timeout)
2282 * [`UnixDatagram::read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.read_timeout)
2283 * [`UnixDatagram::write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.write_timeout)
2284 * [`UnixDatagram::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_nonblocking)
2285 * [`UnixDatagram::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.take_error)
2286 * [`UnixDatagram::shutdown`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.shutdown)
2287 * RawFd impls for `UnixDatagram`
2288 * `{BTree,Hash}Map::values_mut`
2289 * [`<[_]>::binary_search_by_key`](http://doc.rust-lang.org/beta/std/primitive.slice.html#method.binary_search_by_key)
2294 * [The `abs_sub` method of floats is deprecated](https://github.com/rust-lang/rust/pull/33664).
2295 The semantics of this minor method are subtle and probably not what
2297 * [Add implementation of Ord for Cell<T> and RefCell<T> where T: Ord](https://github.com/rust-lang/rust/pull/33306).
2298 * [On Linux, if `HashMap`s can't be initialized with `getrandom` they
2299 will fall back to `/dev/urandom` temporarily to avoid blocking
2300 during early boot](https://github.com/rust-lang/rust/pull/33086).
2301 * [Implemented negation for wrapping numerals](https://github.com/rust-lang/rust/pull/33067).
2302 * [Implement `Clone` for `binary_heap::IntoIter`](https://github.com/rust-lang/rust/pull/33050).
2303 * [Implement `Display` and `Hash` for `std::num::Wrapping`](https://github.com/rust-lang/rust/pull/33023).
2304 * [Add `Default` implementation for `&CStr`, `CString`](https://github.com/rust-lang/rust/pull/32990).
2305 * [Implement `From<Vec<T>>` and `Into<Vec<T>>` for `VecDeque<T>`](https://github.com/rust-lang/rust/pull/32866).
2306 * [Implement `Default` for `UnsafeCell`, `fmt::Error`, `Condvar`,
2307 `Mutex`, `RwLock`](https://github.com/rust-lang/rust/pull/32785).
2311 * [Cargo.toml supports the `profile.*.panic` option](https://github.com/rust-lang/cargo/pull/2687).
2312 This controls the runtime behavior of the `panic!` macro
2313 and can be either "unwind" (the default), or "abort".
2314 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
2315 * [Don't throw away errors with `-p` arguments](https://github.com/rust-lang/cargo/pull/2723).
2316 * [Report status to stderr instead of stdout](https://github.com/rust-lang/cargo/pull/2693).
2317 * [Build scripts are passed a `CARGO_MANIFEST_LINKS` environment
2318 variable that corresponds to the `links` field of the manifest](https://github.com/rust-lang/cargo/pull/2710).
2319 * [Ban keywords from crate names](https://github.com/rust-lang/cargo/pull/2707).
2320 * [Canonicalize `CARGO_HOME` on Windows](https://github.com/rust-lang/cargo/pull/2604).
2321 * [Retry network requests](https://github.com/rust-lang/cargo/pull/2396).
2322 By default they are retried twice, which can be customized with the
2323 `net.retry` value in `.cargo/config`.
2324 * [Don't print extra error info for failing subcommands](https://github.com/rust-lang/cargo/pull/2674).
2325 * [Add `--force` flag to `cargo install`](https://github.com/rust-lang/cargo/pull/2405).
2326 * [Don't use `flock` on NFS mounts](https://github.com/rust-lang/cargo/pull/2623).
2327 * [Prefer building `cargo install` artifacts in temporary directories](https://github.com/rust-lang/cargo/pull/2610).
2328 Makes it possible to install multiple crates in parallel.
2329 * [Add `cargo test --doc`](https://github.com/rust-lang/cargo/pull/2578).
2330 * [Add `cargo --explain`](https://github.com/rust-lang/cargo/pull/2551).
2331 * [Don't print warnings when `-q` is passed](https://github.com/rust-lang/cargo/pull/2576).
2332 * [Add `cargo doc --lib` and `--bin`](https://github.com/rust-lang/cargo/pull/2577).
2333 * [Don't require build script output to be UTF-8](https://github.com/rust-lang/cargo/pull/2560).
2334 * [Correctly attempt multiple git usernames](https://github.com/rust-lang/cargo/pull/2584).
2339 * [rustc memory usage was reduced by refactoring the context used for
2340 type checking](https://github.com/rust-lang/rust/pull/33425).
2341 * [Speed up creation of `HashMap`s by caching the random keys used
2342 to initialize the hash state](https://github.com/rust-lang/rust/pull/33318).
2343 * [The `find` implementation for `Chain` iterators is 2x faster](https://github.com/rust-lang/rust/pull/33289).
2344 * [Trait selection optimizations speed up type checking by 15%](https://github.com/rust-lang/rust/pull/33138).
2345 * [Efficient trie lookup for boolean Unicode properties](https://github.com/rust-lang/rust/pull/33098).
2346 10x faster than the previous lookup tables.
2347 * [Special case `#[derive(Copy, Clone)]` to avoid bloat](https://github.com/rust-lang/rust/pull/31414).
2352 * Many incremental improvements to documentation and rustdoc.
2353 * [rustdoc: List blanket trait impls](https://github.com/rust-lang/rust/pull/33514).
2354 * [rustdoc: Clean up ABI rendering](https://github.com/rust-lang/rust/pull/33151).
2355 * [Indexing with the wrong type produces a more informative error](https://github.com/rust-lang/rust/pull/33401).
2356 * [Improve diagnostics for constants being used in irrefutable patterns](https://github.com/rust-lang/rust/pull/33406).
2357 * [When many method candidates are in scope limit the suggestions to 10](https://github.com/rust-lang/rust/pull/33338).
2358 * [Remove confusing suggestion when calling a `fn` type](https://github.com/rust-lang/rust/pull/33325).
2359 * [Do not suggest changing `&mut self` to `&mut mut self`](https://github.com/rust-lang/rust/pull/33319).
2364 * [Update i686-linux-android features to match Android ABI](https://github.com/rust-lang/rust/pull/33651).
2365 * [Update aarch64-linux-android features to match Android ABI](https://github.com/rust-lang/rust/pull/33500).
2366 * [`std` no longer prints backtraces on platforms where the running
2367 module must be loaded with `env::current_exe`, which can't be relied
2368 on](https://github.com/rust-lang/rust/pull/33554).
2369 * This release includes std binaries for the i586-unknown-linux-gnu,
2370 i686-unknown-linux-musl, and armv7-linux-androideabi targets. The
2371 i586 target is for old x86 hardware without SSE2, and the armv7
2372 target is for Android running on modern ARM architectures.
2373 * [The `rust-gdb` and `rust-lldb` scripts are distributed on all
2374 Unix platforms](https://github.com/rust-lang/rust/pull/32835).
2375 * [On Unix the runtime aborts by calling `libc::abort` instead of
2376 generating an illegal instruction](https://github.com/rust-lang/rust/pull/31457).
2377 * [Rust is now bootstrapped from the previous release of Rust,
2378 instead of a snapshot from an arbitrary commit](https://github.com/rust-lang/rust/pull/32942).
2383 * [`AtomicBool` is now bool-sized, not word-sized](https://github.com/rust-lang/rust/pull/33579).
2384 * [`target_env` for Linux ARM targets is just `gnu`, not
2385 `gnueabihf`, `gnueabi`, etc](https://github.com/rust-lang/rust/pull/33403).
2386 * [Consistently panic on overflow in `Duration::new`](https://github.com/rust-lang/rust/pull/33072).
2387 * [Change `String::truncate` to panic less](https://github.com/rust-lang/rust/pull/32977).
2388 * [Add `:block` to the follow set for `:ty` and `:path`](https://github.com/rust-lang/rust/pull/32945).
2389 Affects how macros are parsed.
2390 * [Fix macro hygiene bug](https://github.com/rust-lang/rust/pull/32923).
2391 * [Feature-gated attributes on macro-generated macro invocations are
2392 now rejected](https://github.com/rust-lang/rust/pull/32791).
2393 * [Suppress fallback and ambiguity errors during type inference](https://github.com/rust-lang/rust/pull/32258).
2394 This caused some minor changes to type inference.
2397 Version 1.9.0 (2016-05-26)
2398 ==========================
2403 * The `#[deprecated]` attribute when applied to an API will generate
2404 warnings when used. The warnings may be suppressed with
2405 `#[allow(deprecated)]`. [RFC 1270].
2406 * [`fn` item types are zero sized, and each `fn` names a unique
2407 type][1.9fn]. This will break code that transmutes `fn`s, so calling
2408 `transmute` on a `fn` type will generate a warning for a few cycles,
2409 then will be converted to an error.
2410 * [Field and method resolution understand visibility, so private
2411 fields and methods cannot prevent the proper use of public fields
2412 and methods][1.9fv].
2413 * [The parser considers unicode codepoints in the
2414 `PATTERN_WHITE_SPACE` category to be whitespace][1.9ws].
2420 * [`std::panic::catch_unwind`][] (renamed from `recover`)
2421 * [`std::panic::resume_unwind`][] (renamed from `propagate`)
2422 * [`std::panic::AssertUnwindSafe`][] (renamed from `AssertRecoverSafe`)
2423 * [`std::panic::UnwindSafe`][] (renamed from `RecoverSafe`)
2424 * [`str::is_char_boundary`]
2425 * [`<*const T>::as_ref`]
2426 * [`<*mut T>::as_ref`]
2427 * [`<*mut T>::as_mut`]
2428 * [`AsciiExt::make_ascii_uppercase`]
2429 * [`AsciiExt::make_ascii_lowercase`]
2430 * [`char::decode_utf16`]
2431 * [`char::DecodeUtf16`]
2432 * [`char::DecodeUtf16Error`]
2433 * [`char::DecodeUtf16Error::unpaired_surrogate`]
2434 * [`BTreeSet::take`]
2435 * [`BTreeSet::replace`]
2438 * [`HashSet::replace`]
2440 * [`OsString::with_capacity`]
2441 * [`OsString::clear`]
2442 * [`OsString::capacity`]
2443 * [`OsString::reserve`]
2444 * [`OsString::reserve_exact`]
2445 * [`OsStr::is_empty`]
2447 * [`std::os::unix::thread`]
2450 * [`JoinHandleExt::as_pthread_t`]
2451 * [`JoinHandleExt::into_pthread_t`]
2452 * [`HashSet::hasher`]
2453 * [`HashMap::hasher`]
2454 * [`CommandExt::exec`]
2455 * [`File::try_clone`]
2456 * [`SocketAddr::set_ip`]
2457 * [`SocketAddr::set_port`]
2458 * [`SocketAddrV4::set_ip`]
2459 * [`SocketAddrV4::set_port`]
2460 * [`SocketAddrV6::set_ip`]
2461 * [`SocketAddrV6::set_port`]
2462 * [`SocketAddrV6::set_flowinfo`]
2463 * [`SocketAddrV6::set_scope_id`]
2464 * [`slice::copy_from_slice`]
2465 * [`ptr::read_volatile`]
2466 * [`ptr::write_volatile`]
2467 * [`OpenOptions::create_new`]
2468 * [`TcpStream::set_nodelay`]
2469 * [`TcpStream::nodelay`]
2470 * [`TcpStream::set_ttl`]
2471 * [`TcpStream::ttl`]
2472 * [`TcpStream::set_only_v6`]
2473 * [`TcpStream::only_v6`]
2474 * [`TcpStream::take_error`]
2475 * [`TcpStream::set_nonblocking`]
2476 * [`TcpListener::set_ttl`]
2477 * [`TcpListener::ttl`]
2478 * [`TcpListener::set_only_v6`]
2479 * [`TcpListener::only_v6`]
2480 * [`TcpListener::take_error`]
2481 * [`TcpListener::set_nonblocking`]
2482 * [`UdpSocket::set_broadcast`]
2483 * [`UdpSocket::broadcast`]
2484 * [`UdpSocket::set_multicast_loop_v4`]
2485 * [`UdpSocket::multicast_loop_v4`]
2486 * [`UdpSocket::set_multicast_ttl_v4`]
2487 * [`UdpSocket::multicast_ttl_v4`]
2488 * [`UdpSocket::set_multicast_loop_v6`]
2489 * [`UdpSocket::multicast_loop_v6`]
2490 * [`UdpSocket::set_multicast_ttl_v6`]
2491 * [`UdpSocket::multicast_ttl_v6`]
2492 * [`UdpSocket::set_ttl`]
2493 * [`UdpSocket::ttl`]
2494 * [`UdpSocket::set_only_v6`]
2495 * [`UdpSocket::only_v6`]
2496 * [`UdpSocket::join_multicast_v4`]
2497 * [`UdpSocket::join_multicast_v6`]
2498 * [`UdpSocket::leave_multicast_v4`]
2499 * [`UdpSocket::leave_multicast_v6`]
2500 * [`UdpSocket::take_error`]
2501 * [`UdpSocket::connect`]
2502 * [`UdpSocket::send`]
2503 * [`UdpSocket::recv`]
2504 * [`UdpSocket::set_nonblocking`]
2509 * [`std::sync::Once` is poisoned if its initialization function
2511 * [`cell::Ref` and `cell::RefMut` can contain unsized types][1.9cu].
2512 * [Most types implement `fmt::Debug`][1.9db].
2513 * [The default buffer size used by `BufReader` and `BufWriter` was
2514 reduced to 8K, from 64K][1.9bf]. This is in line with the buffer size
2515 used by other languages.
2516 * [`Instant`, `SystemTime` and `Duration` implement `+=` and `-=`.
2517 `Duration` additionally implements `*=` and `/=`][1.9ta].
2518 * [`Skip` is a `DoubleEndedIterator`][1.9sk].
2519 * [`From<[u8; 4]>` is implemented for `Ipv4Addr`][1.9fi].
2520 * [`Chain` implements `BufRead`][1.9ch].
2521 * [`HashMap`, `HashSet` and iterators are covariant][1.9hc].
2526 * [Cargo can now run concurrently][1.9cc].
2527 * [Top-level overrides allow specific revisions of crates to be
2528 overridden through the entire crate graph][1.9ct]. This is intended
2529 to make upgrades easier for large projects, by allowing crates to be
2530 forked temporarily until they've been upgraded and republished.
2531 * [Cargo exports a `CARGO_PKG_AUTHORS` environment variable][1.9cp].
2532 * [Cargo will pass the contents of the `RUSTFLAGS` variable to `rustc`
2533 on the commandline][1.9cf]. `rustc` arguments can also be specified
2534 in the `build.rustflags` configuration key.
2539 * [The time complexity of comparing variables for equivalence during type
2540 unification is reduced from _O_(_n_!) to _O_(_n_)][1.9tu]. This leads
2541 to major compilation time improvement in some scenarios.
2542 * [`ToString` is specialized for `str`, giving it the same performance
2543 as `to_owned`][1.9ts].
2544 * [Spawning processes with `Command::output` no longer creates extra
2546 * [`#[derive(PartialEq)]` and `#[derive(PartialOrd)]` emit less code
2547 for C-like enums][1.9cl].
2552 * [Passing the `--quiet` flag to a test runner will produce
2553 much-abbreviated output][1.9q].
2554 * The Rust Project now publishes std binaries for the
2555 `mips-unknown-linux-musl`, `mipsel-unknown-linux-musl`, and
2556 `i586-pc-windows-msvc` targets.
2561 * [`std::sync::Once` is poisoned if its initialization function
2563 * [It is illegal to define methods with the same name in overlapping
2564 inherent `impl` blocks][1.9sn].
2565 * [`fn` item types are zero sized, and each `fn` names a unique
2566 type][1.9fn]. This will break code that transmutes `fn`s, so calling
2567 `transmute` on a `fn` type will generate a warning for a few cycles,
2568 then will be converted to an error.
2569 * [Improvements to const evaluation may trigger new errors when integer
2570 literals are out of range][1.9ce].
2573 [1.9bf]: https://github.com/rust-lang/rust/pull/32695
2574 [1.9cc]: https://github.com/rust-lang/cargo/pull/2486
2575 [1.9ce]: https://github.com/rust-lang/rust/pull/30587
2576 [1.9cf]: https://github.com/rust-lang/cargo/pull/2241
2577 [1.9ch]: https://github.com/rust-lang/rust/pull/32541
2578 [1.9cl]: https://github.com/rust-lang/rust/pull/31977
2579 [1.9cp]: https://github.com/rust-lang/cargo/pull/2465
2580 [1.9ct]: https://github.com/rust-lang/cargo/pull/2385
2581 [1.9cu]: https://github.com/rust-lang/rust/pull/32652
2582 [1.9db]: https://github.com/rust-lang/rust/pull/32054
2583 [1.9fi]: https://github.com/rust-lang/rust/pull/32050
2584 [1.9fn]: https://github.com/rust-lang/rust/pull/31710
2585 [1.9fv]: https://github.com/rust-lang/rust/pull/31938
2586 [1.9hc]: https://github.com/rust-lang/rust/pull/32635
2587 [1.9o]: https://github.com/rust-lang/rust/pull/32325
2588 [1.9q]: https://github.com/rust-lang/rust/pull/31887
2589 [1.9sk]: https://github.com/rust-lang/rust/pull/31700
2590 [1.9sn]: https://github.com/rust-lang/rust/pull/31925
2591 [1.9sp]: https://github.com/rust-lang/rust/pull/31618
2592 [1.9ta]: https://github.com/rust-lang/rust/pull/32448
2593 [1.9ts]: https://github.com/rust-lang/rust/pull/32586
2594 [1.9tu]: https://github.com/rust-lang/rust/pull/32062
2595 [1.9ws]: https://github.com/rust-lang/rust/pull/29734
2596 [RFC 1270]: https://github.com/rust-lang/rfcs/blob/master/text/1270-deprecation.md
2597 [`<*const T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
2598 [`<*mut T>::as_mut`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_mut
2599 [`<*mut T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
2600 [`slice::copy_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.copy_from_slice
2601 [`AsciiExt::make_ascii_lowercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_lowercase
2602 [`AsciiExt::make_ascii_uppercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_uppercase
2603 [`BTreeSet::get`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.get
2604 [`BTreeSet::replace`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.replace
2605 [`BTreeSet::take`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.take
2606 [`CommandExt::exec`]: http://doc.rust-lang.org/nightly/std/os/unix/process/trait.CommandExt.html#tymethod.exec
2607 [`File::try_clone`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html#method.try_clone
2608 [`HashMap::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.hasher
2609 [`HashSet::get`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.get
2610 [`HashSet::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.hasher
2611 [`HashSet::replace`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.replace
2612 [`HashSet::take`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.take
2613 [`JoinHandleExt::as_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.as_pthread_t
2614 [`JoinHandleExt::into_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.into_pthread_t
2615 [`JoinHandleExt`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html
2616 [`OpenOptions::create_new`]: http://doc.rust-lang.org/nightly/std/fs/struct.OpenOptions.html#method.create_new
2617 [`OsStr::is_empty`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.is_empty
2618 [`OsStr::len`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.len
2619 [`OsString::capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.capacity
2620 [`OsString::clear`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.clear
2621 [`OsString::reserve_exact`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve_exact
2622 [`OsString::reserve`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve
2623 [`OsString::with_capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.with_capacity
2624 [`RawPthread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/type.RawPthread.html
2625 [`SocketAddr::set_ip`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_ip
2626 [`SocketAddr::set_port`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_port
2627 [`SocketAddrV4::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_ip
2628 [`SocketAddrV4::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_port
2629 [`SocketAddrV6::set_flowinfo`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_flowinfo
2630 [`SocketAddrV6::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_ip
2631 [`SocketAddrV6::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_port
2632 [`SocketAddrV6::set_scope_id`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_scope_id
2633 [`TcpListener::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
2634 [`TcpListener::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
2635 [`TcpListener::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
2636 [`TcpListener::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
2637 [`TcpListener::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
2638 [`TcpListener::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
2639 [`TcpStream::nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.nodelay
2640 [`TcpStream::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
2641 [`TcpStream::set_nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nodelay
2642 [`TcpStream::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
2643 [`TcpStream::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
2644 [`TcpStream::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
2645 [`TcpStream::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
2646 [`TcpStream::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
2647 [`UdpSocket::broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.broadcast
2648 [`UdpSocket::connect`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.connect
2649 [`UdpSocket::join_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v4
2650 [`UdpSocket::join_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v6
2651 [`UdpSocket::leave_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v4
2652 [`UdpSocket::leave_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v6
2653 [`UdpSocket::multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v4
2654 [`UdpSocket::multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v6
2655 [`UdpSocket::multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v4
2656 [`UdpSocket::multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v6
2657 [`UdpSocket::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.only_v6
2658 [`UdpSocket::recv`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.recv
2659 [`UdpSocket::send`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.send
2660 [`UdpSocket::set_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_broadcast
2661 [`UdpSocket::set_multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v4
2662 [`UdpSocket::set_multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v6
2663 [`UdpSocket::set_multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v4
2664 [`UdpSocket::set_multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v6
2665 [`UdpSocket::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_nonblocking
2666 [`UdpSocket::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_only_v6
2667 [`UdpSocket::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_ttl
2668 [`UdpSocket::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.take_error
2669 [`UdpSocket::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.ttl
2670 [`char::DecodeUtf16Error::unpaired_surrogate`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html#method.unpaired_surrogate
2671 [`char::DecodeUtf16Error`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html
2672 [`char::DecodeUtf16`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16.html
2673 [`char::decode_utf16`]: http://doc.rust-lang.org/nightly/std/char/fn.decode_utf16.html
2674 [`ptr::read_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.read_volatile.html
2675 [`ptr::write_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.write_volatile.html
2676 [`std::os::unix::thread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/index.html
2677 [`std::panic::AssertUnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/struct.AssertUnwindSafe.html
2678 [`std::panic::UnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/trait.UnwindSafe.html
2679 [`std::panic::catch_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.catch_unwind.html
2680 [`std::panic::resume_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.resume_unwind.html
2681 [`std::panic`]: http://doc.rust-lang.org/nightly/std/panic/index.html
2682 [`str::is_char_boundary`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.is_char_boundary
2685 Version 1.8.0 (2016-04-14)
2686 ==========================
2691 * Rust supports overloading of compound assignment statements like
2692 `+=` by implementing the [`AddAssign`], [`SubAssign`],
2693 [`MulAssign`], [`DivAssign`], [`RemAssign`], [`BitAndAssign`],
2694 [`BitOrAssign`], [`BitXorAssign`], [`ShlAssign`], or [`ShrAssign`]
2696 * Empty structs can be defined with braces, as in `struct Foo { }`, in
2697 addition to the non-braced form, `struct Foo;`. [RFC 218].
2703 * [`str::encode_utf16`][] (renamed from `utf16_units`)
2704 * [`str::EncodeUtf16`][] (renamed from `Utf16Units`)
2707 * [`ptr::drop_in_place`]
2709 * [`time::SystemTime`]
2711 * [`Instant::duration_since`][] (renamed from `duration_from_earlier`)
2712 * [`Instant::elapsed`]
2713 * [`SystemTime::now`]
2714 * [`SystemTime::duration_since`][] (renamed from `duration_from_earlier`)
2715 * [`SystemTime::elapsed`]
2716 * Various `Add`/`Sub` impls for `Time` and `SystemTime`
2717 * [`SystemTimeError`]
2718 * [`SystemTimeError::duration`]
2719 * Various impls for `SystemTimeError`
2721 * [`AddAssign`], [`SubAssign`], [`MulAssign`], [`DivAssign`],
2722 [`RemAssign`], [`BitAndAssign`], [`BitOrAssign`],
2723 [`BitXorAssign`], [`ShlAssign`], [`ShrAssign`].
2724 * [The `write!` and `writeln!` macros correctly emit errors if any of
2725 their arguments can't be formatted][1.8w].
2726 * [Various I/O functions support large files on 32-bit Linux][1.8l].
2727 * [The Unix-specific `raw` modules, which contain a number of
2728 redefined C types are deprecated][1.8r], including `os::raw::unix`,
2729 `os::raw::macos`, and `os::raw::linux`. These modules defined types
2730 such as `ino_t` and `dev_t`. The inconsistency of these definitions
2731 across platforms was making it difficult to implement `std`
2732 correctly. Those that need these definitions should use the `libc`
2734 * The Unix-specific `MetadataExt` traits, including
2735 `os::unix::fs::MetadataExt`, which expose values such as inode
2736 numbers [no longer return platform-specific types][1.8r], but
2737 instead return widened integers. [RFC 1415].
2738 * [`btree_set::{IntoIter, Iter, Range}` are covariant][1.8cv].
2739 * [Atomic loads and stores are not volatile][1.8a].
2740 * [All types in `sync::mpsc` implement `fmt::Debug`][1.8mp].
2745 * [Inlining hash functions lead to a 3% compile-time improvement in
2746 some workloads][1.8h].
2747 * When using jemalloc, its symbols are [unprefixed so that it
2748 overrides the libc malloc implementation][1.8h]. This means that for
2749 rustc, LLVM is now using jemalloc, which results in a 6%
2750 compile-time improvement on a specific workload.
2751 * [Avoid quadratic growth in function size due to cleanups][1.8cu].
2756 * [32-bit MSVC builds finally implement unwinding][1.8ms].
2757 i686-pc-windows-msvc is now considered a tier-1 platform.
2758 * [The `--print targets` flag prints a list of supported targets][1.8t].
2759 * [The `--print cfg` flag prints the `cfg`s defined for the current
2761 * [`rustc` can be built with an new Cargo-based build system, written
2762 in Rust][1.8b]. It will eventually replace Rust's Makefile-based
2763 build system. To enable it configure with `configure --rustbuild`.
2764 * [Errors for non-exhaustive `match` patterns now list up to 3 missing
2765 variants while also indicating the total number of missing variants
2766 if more than 3][1.8m].
2767 * [Executable stacks are disabled on Linux and BSD][1.8nx].
2768 * The Rust Project now publishes binary releases of the standard
2769 library for a number of tier-2 targets:
2770 `armv7-unknown-linux-gnueabihf`, `powerpc-unknown-linux-gnu`,
2771 `powerpc64-unknown-linux-gnu`, `powerpc64le-unknown-linux-gnu`
2772 `x86_64-rumprun-netbsd`. These can be installed with
2773 tools such as [multirust][1.8mr].
2778 * [`cargo init` creates a new Cargo project in the current
2779 directory][1.8ci]. It is otherwise like `cargo new`.
2780 * [Cargo has configuration keys for `-v` and
2781 `--color`][1.8cc]. `verbose` and `color`, respectively, go in the
2782 `[term]` section of `.cargo/config`.
2783 * [Configuration keys that evaluate to strings or integers can be set
2784 via environment variables][1.8ce]. For example the `build.jobs` key
2785 can be set via `CARGO_BUILD_JOBS`. Environment variables take
2786 precedence over config files.
2787 * [Target-specific dependencies support Rust `cfg` syntax for
2788 describing targets][1.8cfg] so that dependencies for multiple
2789 targets can be specified together. [RFC 1361].
2790 * [The environment variables `CARGO_TARGET_ROOT`, `RUSTC`, and
2791 `RUSTDOC` take precedence over the `build.target-dir`,
2792 `build.rustc`, and `build.rustdoc` configuration values][1.8cv].
2793 * [The child process tree is killed on Windows when Cargo is
2795 * [The `build.target` configuration value sets the target platform,
2796 like `--target`][1.8ct].
2801 * [Unstable compiler flags have been further restricted][1.8u]. Since
2802 1.0 `-Z` flags have been considered unstable, and other flags that
2803 were considered unstable additionally required passing `-Z
2804 unstable-options` to access. Unlike unstable language and library
2805 features though, these options have been accessible on the stable
2806 release channel. Going forward, *new unstable flags will not be
2807 available on the stable release channel*, and old unstable flags
2808 will warn about their usage. In the future, all unstable flags will
2809 be unavailable on the stable release channel.
2810 * [It is no longer possible to `match` on empty enum variants using
2811 the `Variant(..)` syntax][1.8v]. This has been a warning since 1.6.
2812 * The Unix-specific `MetadataExt` traits, including
2813 `os::unix::fs::MetadataExt`, which expose values such as inode
2814 numbers [no longer return platform-specific types][1.8r], but
2815 instead return widened integers. [RFC 1415].
2816 * [Modules sourced from the filesystem cannot appear within arbitrary
2817 blocks, but only within other modules][1.8mf].
2818 * [`--cfg` compiler flags are parsed strictly as identifiers][1.8c].
2819 * On Unix, [stack overflow triggers a runtime abort instead of a
2821 * [`Command::spawn` and its equivalents return an error if any of
2822 its command-line arguments contain interior `NUL`s][1.8n].
2823 * [Tuple and unit enum variants from other crates are in the type
2825 * [On Windows `rustc` emits `.lib` files for the `staticlib` library
2826 type instead of `.a` files][1.8st]. Additionally, for the MSVC
2827 toolchain, `rustc` emits import libraries named `foo.dll.lib`
2828 instead of `foo.lib`.
2831 [1.8a]: https://github.com/rust-lang/rust/pull/30962
2832 [1.8b]: https://github.com/rust-lang/rust/pull/31123
2833 [1.8c]: https://github.com/rust-lang/rust/pull/31530
2834 [1.8cc]: https://github.com/rust-lang/cargo/pull/2397
2835 [1.8ce]: https://github.com/rust-lang/cargo/pull/2398
2836 [1.8cf]: https://github.com/rust-lang/rust/pull/31278
2837 [1.8cfg]: https://github.com/rust-lang/cargo/pull/2328
2838 [1.8ci]: https://github.com/rust-lang/cargo/pull/2081
2839 [1.8ck]: https://github.com/rust-lang/cargo/pull/2370
2840 [1.8ct]: https://github.com/rust-lang/cargo/pull/2335
2841 [1.8cu]: https://github.com/rust-lang/rust/pull/31390
2842 [1.8cv]: https://github.com/rust-lang/cargo/issues/2365
2843 [1.8cv]: https://github.com/rust-lang/rust/pull/30998
2844 [1.8h]: https://github.com/rust-lang/rust/pull/31460
2845 [1.8l]: https://github.com/rust-lang/rust/pull/31668
2846 [1.8m]: https://github.com/rust-lang/rust/pull/31020
2847 [1.8mf]: https://github.com/rust-lang/rust/pull/31534
2848 [1.8mp]: https://github.com/rust-lang/rust/pull/30894
2849 [1.8mr]: https://users.rust-lang.org/t/multirust-0-8-with-cross-std-installation/4901
2850 [1.8ms]: https://github.com/rust-lang/rust/pull/30448
2851 [1.8n]: https://github.com/rust-lang/rust/pull/31056
2852 [1.8nx]: https://github.com/rust-lang/rust/pull/30859
2853 [1.8r]: https://github.com/rust-lang/rust/pull/31551
2854 [1.8so]: https://github.com/rust-lang/rust/pull/31333
2855 [1.8st]: https://github.com/rust-lang/rust/pull/29520
2856 [1.8t]: https://github.com/rust-lang/rust/pull/31358
2857 [1.8tn]: https://github.com/rust-lang/rust/pull/30882
2858 [1.8u]: https://github.com/rust-lang/rust/pull/31793
2859 [1.8v]: https://github.com/rust-lang/rust/pull/31757
2860 [1.8w]: https://github.com/rust-lang/rust/pull/31904
2861 [RFC 1361]: https://github.com/rust-lang/rfcs/blob/master/text/1361-cargo-cfg-dependencies.md
2862 [RFC 1415]: https://github.com/rust-lang/rfcs/blob/master/text/1415-trim-std-os.md
2863 [RFC 218]: https://github.com/rust-lang/rfcs/blob/master/text/0218-empty-struct-with-braces.md
2864 [RFC 953]: https://github.com/rust-lang/rfcs/blob/master/text/0953-op-assign.md
2865 [`AddAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.AddAssign.html
2866 [`BitAndAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitAndAssign.html
2867 [`BitOrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitOrAssign.html
2868 [`BitXorAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitXorAssign.html
2869 [`DivAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.DivAssign.html
2870 [`Instant::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.duration_since
2871 [`Instant::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.elapsed
2872 [`Instant::now`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.now
2873 [`MulAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.MulAssign.html
2874 [`Ref::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.Ref.html#method.map
2875 [`RefMut::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.RefMut.html#method.map
2876 [`RemAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.RemAssign.html
2877 [`ShlAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShlAssign.html
2878 [`ShrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShrAssign.html
2879 [`SubAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.SubAssign.html
2880 [`SystemTime::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.duration_since
2881 [`SystemTime::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.elapsed
2882 [`SystemTime::now`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.now
2883 [`SystemTimeError::duration`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html#method.duration
2884 [`SystemTimeError`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html
2885 [`UNIX_EPOCH`]: http://doc.rust-lang.org/nightly/std/time/constant.UNIX_EPOCH.html
2886 [`ptr::drop_in_place`]: http://doc.rust-lang.org/nightly/std/ptr/fn.drop_in_place.html
2887 [`str::EncodeUtf16`]: http://doc.rust-lang.org/nightly/std/str/struct.EncodeUtf16.html
2888 [`str::encode_utf16`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.encode_utf16
2889 [`time::Instant`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html
2890 [`time::SystemTime`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html
2893 Version 1.7.0 (2016-03-03)
2894 ==========================
2901 * [`Path::strip_prefix`][] (renamed from relative_from)
2902 * [`path::StripPrefixError`][] (new error type returned from strip_prefix)
2904 * [`Ipv4Addr::is_loopback`]
2905 * [`Ipv4Addr::is_private`]
2906 * [`Ipv4Addr::is_link_local`]
2907 * [`Ipv4Addr::is_multicast`]
2908 * [`Ipv4Addr::is_broadcast`]
2909 * [`Ipv4Addr::is_documentation`]
2911 * [`Ipv6Addr::is_unspecified`]
2912 * [`Ipv6Addr::is_loopback`]
2913 * [`Ipv6Addr::is_multicast`]
2916 * [`Vec::as_mut_slice`]
2918 * [`String::as_str`]
2919 * [`String::as_mut_str`]
2921 * `<[T]>::`[`clone_from_slice`], which now requires the two slices to
2923 * `<[T]>::`[`sort_by_key`]
2924 * checked, saturated, and overflowing operations
2925 * [`i32::checked_rem`], [`i32::checked_neg`], [`i32::checked_shl`], [`i32::checked_shr`]
2926 * [`i32::saturating_mul`]
2927 * [`i32::overflowing_add`], [`i32::overflowing_sub`], [`i32::overflowing_mul`], [`i32::overflowing_div`]
2928 * [`i32::overflowing_rem`], [`i32::overflowing_neg`], [`i32::overflowing_shl`], [`i32::overflowing_shr`]
2929 * [`u32::checked_rem`], [`u32::checked_neg`], [`u32::checked_shl`], [`u32::checked_shl`]
2930 * [`u32::saturating_mul`]
2931 * [`u32::overflowing_add`], [`u32::overflowing_sub`], [`u32::overflowing_mul`], [`u32::overflowing_div`]
2932 * [`u32::overflowing_rem`], [`u32::overflowing_neg`], [`u32::overflowing_shl`], [`u32::overflowing_shr`]
2933 * and checked, saturated, and overflowing operations for other primitive types
2935 * [`ffi::IntoStringError`]
2936 * [`CString::into_string`]
2937 * [`CString::into_bytes`]
2938 * [`CString::into_bytes_with_nul`]
2939 * `From<CString> for Vec<u8>`
2941 * [`IntoStringError::into_cstring`]
2942 * [`IntoStringError::utf8_error`]
2943 * `Error for IntoStringError`
2945 * [`std::hash::BuildHasher`]
2946 * [`BuildHasher::Hasher`]
2947 * [`BuildHasher::build_hasher`]
2948 * [`std::hash::BuildHasherDefault`]
2949 * [`HashMap::with_hasher`]
2950 * [`HashMap::with_capacity_and_hasher`]
2951 * [`HashSet::with_hasher`]
2952 * [`HashSet::with_capacity_and_hasher`]
2953 * [`std::collections::hash_map::RandomState`]
2954 * [`RandomState::new`]
2955 * [Validating UTF-8 is faster by a factor of between 7 and 14x for
2956 ASCII input][1.7utf8]. This means that creating `String`s and `str`s
2957 from bytes is faster.
2958 * [The performance of `LineWriter` (and thus `io::stdout`) was
2959 improved by using `memchr` to search for newlines][1.7m].
2960 * [`f32::to_degrees` and `f32::to_radians` are stable][1.7f]. The
2961 `f64` variants were stabilized previously.
2962 * [`BTreeMap` was rewritten to use less memory and improve the performance
2963 of insertion and iteration, the latter by as much as 5x][1.7bm].
2964 * [`BTreeSet` and its iterators, `Iter`, `IntoIter`, and `Range` are
2965 covariant over their contained type][1.7bt].
2966 * [`LinkedList` and its iterators, `Iter` and `IntoIter` are covariant
2967 over their contained type][1.7ll].
2968 * [`str::replace` now accepts a `Pattern`][1.7rp], like other string
2970 * [`Any` is implemented for unsized types][1.7a].
2971 * [`Hash` is implemented for `Duration`][1.7h].
2976 * [When running tests with `--test`, rustdoc will pass `--cfg`
2977 arguments to the compiler][1.7dt].
2978 * [The compiler is built with RPATH information by default][1.7rpa].
2979 This means that it will be possible to run `rustc` when installed in
2980 unusual configurations without configuring the dynamic linker search
2982 * [`rustc` passes `--enable-new-dtags` to GNU ld][1.7dta]. This makes
2983 any RPATH entries (emitted with `-C rpath`) *not* take precedence
2984 over `LD_LIBRARY_PATH`.
2989 * [`cargo rustc` accepts a `--profile` flag that runs `rustc` under
2990 any of the compilation profiles, 'dev', 'bench', or 'test'][1.7cp].
2991 * [The `rerun-if-changed` build script directive no longer causes the
2992 build script to incorrectly run twice in certain scenarios][1.7rr].
2997 * Soundness fixes to the interactions between associated types and
2998 lifetimes, specified in [RFC 1214], [now generate errors][1.7sf] for
2999 code that violates the new rules. This is a significant change that
3000 is known to break existing code, so it has emitted warnings for the
3001 new error cases since 1.4 to give crate authors time to adapt. The
3002 details of what is changing are subtle; read the RFC for more.
3003 * [Several bugs in the compiler's visibility calculations were
3004 fixed][1.7v]. Since this was found to break significant amounts of
3005 code, the new errors will be emitted as warnings for several release
3006 cycles, under the `private_in_public` lint.
3007 * Defaulted type parameters were accidentally accepted in positions
3008 that were not intended. In this release, [defaulted type parameters
3009 appearing outside of type definitions will generate a
3010 warning][1.7d], which will become an error in future releases.
3011 * [Parsing "." as a float results in an error instead of 0][1.7p].
3012 That is, `".".parse::<f32>()` returns `Err`, not `Ok(0.0)`.
3013 * [Borrows of closure parameters may not outlive the closure][1.7bc].
3015 [1.7a]: https://github.com/rust-lang/rust/pull/30928
3016 [1.7bc]: https://github.com/rust-lang/rust/pull/30341
3017 [1.7bm]: https://github.com/rust-lang/rust/pull/30426
3018 [1.7bt]: https://github.com/rust-lang/rust/pull/30998
3019 [1.7cp]: https://github.com/rust-lang/cargo/pull/2224
3020 [1.7d]: https://github.com/rust-lang/rust/pull/30724
3021 [1.7dt]: https://github.com/rust-lang/rust/pull/30372
3022 [1.7dta]: https://github.com/rust-lang/rust/pull/30394
3023 [1.7f]: https://github.com/rust-lang/rust/pull/30672
3024 [1.7h]: https://github.com/rust-lang/rust/pull/30818
3025 [1.7ll]: https://github.com/rust-lang/rust/pull/30663
3026 [1.7m]: https://github.com/rust-lang/rust/pull/30381
3027 [1.7p]: https://github.com/rust-lang/rust/pull/30681
3028 [1.7rp]: https://github.com/rust-lang/rust/pull/29498
3029 [1.7rpa]: https://github.com/rust-lang/rust/pull/30353
3030 [1.7rr]: https://github.com/rust-lang/cargo/pull/2279
3031 [1.7sf]: https://github.com/rust-lang/rust/pull/30389
3032 [1.7utf8]: https://github.com/rust-lang/rust/pull/30740
3033 [1.7v]: https://github.com/rust-lang/rust/pull/29973
3034 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
3035 [`BuildHasher::Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
3036 [`BuildHasher::build_hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html#tymethod.build_hasher
3037 [`CString::into_bytes_with_nul`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes_with_nul
3038 [`CString::into_bytes`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes
3039 [`CString::into_string`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_string
3040 [`HashMap::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_capacity_and_hasher
3041 [`HashMap::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_hasher
3042 [`HashSet::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_capacity_and_hasher
3043 [`HashSet::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_hasher
3044 [`IntoStringError::into_cstring`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.into_cstring
3045 [`IntoStringError::utf8_error`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.utf8_error
3046 [`Ipv4Addr::is_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_broadcast
3047 [`Ipv4Addr::is_documentation`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_documentation
3048 [`Ipv4Addr::is_link_local`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_link_local
3049 [`Ipv4Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_loopback
3050 [`Ipv4Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_multicast
3051 [`Ipv4Addr::is_private`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_private
3052 [`Ipv6Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_loopback
3053 [`Ipv6Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_multicast
3054 [`Ipv6Addr::is_unspecified`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_unspecified
3055 [`Path::strip_prefix`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.strip_prefix
3056 [`RandomState::new`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html#method.new
3057 [`String::as_mut_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_mut_str
3058 [`String::as_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_str
3059 [`Vec::as_mut_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_mut_slice
3060 [`Vec::as_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_slice
3061 [`clone_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.clone_from_slice
3062 [`ffi::IntoStringError`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html
3063 [`i32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_neg
3064 [`i32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_rem
3065 [`i32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shl
3066 [`i32::checked_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shr
3067 [`i32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_add
3068 [`i32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_div
3069 [`i32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_mul
3070 [`i32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_neg
3071 [`i32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_rem
3072 [`i32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shl
3073 [`i32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shr
3074 [`i32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_sub
3075 [`i32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.saturating_mul
3076 [`path::StripPrefixError`]: http://doc.rust-lang.org/nightly/std/path/struct.StripPrefixError.html
3077 [`sort_by_key`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.sort_by_key
3078 [`std::collections::hash_map::RandomState`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html
3079 [`std::hash::BuildHasherDefault`]: http://doc.rust-lang.org/nightly/std/hash/struct.BuildHasherDefault.html
3080 [`std::hash::BuildHasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html
3081 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
3082 [`u32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_rem
3083 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
3084 [`u32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_shl
3085 [`u32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_add
3086 [`u32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_div
3087 [`u32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_mul
3088 [`u32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_neg
3089 [`u32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_rem
3090 [`u32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shl
3091 [`u32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shr
3092 [`u32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_sub
3093 [`u32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.saturating_mul
3096 Version 1.6.0 (2016-01-21)
3097 ==========================
3102 * The `#![no_std]` attribute causes a crate to not be linked to the
3103 standard library, but only the [core library][1.6co], as described
3104 in [RFC 1184]. The core library defines common types and traits but
3105 has no platform dependencies whatsoever, and is the basis for Rust
3106 software in environments that cannot support a full port of the
3107 standard library, such as operating systems. Most of the core
3108 library is now stable.
3114 [`Read::read_exact`],
3115 [`ErrorKind::UnexpectedEof`][] (renamed from `UnexpectedEOF`),
3116 [`fs::DirBuilder`], [`fs::DirBuilder::new`],
3117 [`fs::DirBuilder::recursive`], [`fs::DirBuilder::create`],
3118 [`os::unix::fs::DirBuilderExt`],
3119 [`os::unix::fs::DirBuilderExt::mode`], [`vec::Drain`],
3120 [`vec::Vec::drain`], [`string::Drain`], [`string::String::drain`],
3121 [`vec_deque::Drain`], [`vec_deque::VecDeque::drain`],
3122 [`collections::hash_map::Drain`],
3123 [`collections::hash_map::HashMap::drain`],
3124 [`collections::hash_set::Drain`],
3125 [`collections::hash_set::HashSet::drain`],
3126 [`collections::binary_heap::Drain`],
3127 [`collections::binary_heap::BinaryHeap::drain`],
3128 [`Vec::extend_from_slice`][] (renamed from `push_all`),
3129 [`Mutex::get_mut`], [`Mutex::into_inner`], [`RwLock::get_mut`],
3130 [`RwLock::into_inner`],
3131 [`Iterator::min_by_key`][] (renamed from `min_by`),
3132 [`Iterator::max_by_key`][] (renamed from `max_by`).
3133 * The [core library][1.6co] is stable, as are most of its APIs.
3134 * [The `assert_eq!` macro supports arguments that don't implement
3135 `Sized`][1.6ae], such as arrays. In this way it behaves more like
3137 * Several timer functions that take duration in milliseconds [are
3138 deprecated in favor of those that take `Duration`][1.6ms]. These
3139 include `Condvar::wait_timeout_ms`, `thread::sleep_ms`, and
3140 `thread::park_timeout_ms`.
3141 * The algorithm by which `Vec` reserves additional elements was
3142 [tweaked to not allocate excessive space][1.6a] while still growing
3144 * `From` conversions are [implemented from integers to floats][1.6f]
3145 in cases where the conversion is lossless. Thus they are not
3146 implemented for 32-bit ints to `f32`, nor for 64-bit ints to `f32`
3147 or `f64`. They are also not implemented for `isize` and `usize`
3148 because the implementations would be platform-specific. `From` is
3149 also implemented from `f32` to `f64`.
3150 * `From<&Path>` and `From<PathBuf>` are implemented for `Cow<Path>`.
3151 * `From<T>` is implemented for `Box<T>`, `Rc<T>` and `Arc<T>`.
3152 * `IntoIterator` is implemented for `&PathBuf` and `&Path`.
3153 * [`BinaryHeap` was refactored][1.6bh] for modest performance
3155 * Sorting slices that are already sorted [is 50% faster in some
3161 * Cargo will look in `$CARGO_HOME/bin` for subcommands [by default][1.6c].
3162 * Cargo build scripts can specify their dependencies by emitting the
3163 [`rerun-if-changed`][1.6rr] key.
3164 * crates.io will reject publication of crates with dependencies that
3165 have a wildcard version constraint. Crates with wildcard
3166 dependencies were seen to cause a variety of problems, as described
3167 in [RFC 1241]. Since 1.5 publication of such crates has emitted a
3169 * `cargo clean` [accepts a `--release` flag][1.6cc] to clean the
3170 release folder. A variety of artifacts that Cargo failed to clean
3171 are now correctly deleted.
3176 * The `unreachable_code` lint [warns when a function call's argument
3178 * The parser indicates [failures that may be caused by
3179 confusingly-similar Unicode characters][1.6uc]
3180 * Certain macro errors [are reported at definition time][1.6m], not
3186 * The compiler no longer makes use of the [`RUST_PATH`][1.6rp]
3187 environment variable when locating crates. This was a pre-cargo
3188 feature for integrating with the package manager that was
3189 accidentally never removed.
3190 * [A number of bugs were fixed in the privacy checker][1.6p] that
3191 could cause previously-accepted code to break.
3192 * [Modules and unit/tuple structs may not share the same name][1.6ts].
3193 * [Bugs in pattern matching unit structs were fixed][1.6us]. The tuple
3194 struct pattern syntax (`Foo(..)`) can no longer be used to match
3195 unit structs. This is a warning now, but will become an error in
3196 future releases. Patterns that share the same name as a const are
3198 * A bug was fixed that causes [rustc not to apply default type
3199 parameters][1.6xc] when resolving certain method implementations of
3200 traits defined in other crates.
3202 [1.6a]: https://github.com/rust-lang/rust/pull/29454
3203 [1.6ae]: https://github.com/rust-lang/rust/pull/29770
3204 [1.6bh]: https://github.com/rust-lang/rust/pull/29811
3205 [1.6c]: https://github.com/rust-lang/cargo/pull/2192
3206 [1.6cc]: https://github.com/rust-lang/cargo/pull/2131
3207 [1.6co]: http://doc.rust-lang.org/beta/core/index.html
3208 [1.6dv]: https://github.com/rust-lang/rust/pull/30000
3209 [1.6f]: https://github.com/rust-lang/rust/pull/29129
3210 [1.6m]: https://github.com/rust-lang/rust/pull/29828
3211 [1.6ms]: https://github.com/rust-lang/rust/pull/29604
3212 [1.6p]: https://github.com/rust-lang/rust/pull/29726
3213 [1.6rp]: https://github.com/rust-lang/rust/pull/30034
3214 [1.6rr]: https://github.com/rust-lang/cargo/pull/2134
3215 [1.6s]: https://github.com/rust-lang/rust/pull/29675
3216 [1.6ts]: https://github.com/rust-lang/rust/issues/21546
3217 [1.6uc]: https://github.com/rust-lang/rust/pull/29837
3218 [1.6us]: https://github.com/rust-lang/rust/pull/29383
3219 [1.6xc]: https://github.com/rust-lang/rust/issues/30123
3220 [RFC 1184]: https://github.com/rust-lang/rfcs/blob/master/text/1184-stabilize-no_std.md
3221 [RFC 1241]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
3222 [`ErrorKind::UnexpectedEof`]: http://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html#variant.UnexpectedEof
3223 [`Iterator::max_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.max_by_key
3224 [`Iterator::min_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.min_by_key
3225 [`Mutex::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.get_mut
3226 [`Mutex::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.into_inner
3227 [`Read::read_exact`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_exact
3228 [`RwLock::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.get_mut
3229 [`RwLock::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.into_inner
3230 [`Vec::extend_from_slice`]: http://doc.rust-lang.org/nightly/collections/vec/struct.Vec.html#method.extend_from_slice
3231 [`collections::binary_heap::BinaryHeap::drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.BinaryHeap.html#method.drain
3232 [`collections::binary_heap::Drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.Drain.html
3233 [`collections::hash_map::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.Drain.html
3234 [`collections::hash_map::HashMap::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.HashMap.html#method.drain
3235 [`collections::hash_set::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.Drain.html
3236 [`collections::hash_set::HashSet::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.HashSet.html#method.drain
3237 [`fs::DirBuilder::create`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.create
3238 [`fs::DirBuilder::new`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.new
3239 [`fs::DirBuilder::recursive`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.recursive
3240 [`fs::DirBuilder`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html
3241 [`os::unix::fs::DirBuilderExt::mode`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html#tymethod.mode
3242 [`os::unix::fs::DirBuilderExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html
3243 [`string::Drain`]: http://doc.rust-lang.org/nightly/std/string/struct.Drain.html
3244 [`string::String::drain`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.drain
3245 [`vec::Drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Drain.html
3246 [`vec::Vec::drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.drain
3247 [`vec_deque::Drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.Drain.html
3248 [`vec_deque::VecDeque::drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.VecDeque.html#method.drain
3251 Version 1.5.0 (2015-12-10)
3252 ==========================
3254 * ~700 changes, numerous bugfixes
3260 [`BinaryHeap::from`], [`BinaryHeap::into_sorted_vec`],
3261 [`BinaryHeap::into_vec`], [`Condvar::wait_timeout`],
3262 [`FileTypeExt::is_block_device`], [`FileTypeExt::is_char_device`],
3263 [`FileTypeExt::is_fifo`], [`FileTypeExt::is_socket`],
3264 [`FileTypeExt`], [`Formatter::alternate`], [`Formatter::fill`],
3265 [`Formatter::precision`], [`Formatter::sign_aware_zero_pad`],
3266 [`Formatter::sign_minus`], [`Formatter::sign_plus`],
3267 [`Formatter::width`], [`Iterator::cmp`], [`Iterator::eq`],
3268 [`Iterator::ge`], [`Iterator::gt`], [`Iterator::le`],
3269 [`Iterator::lt`], [`Iterator::ne`], [`Iterator::partial_cmp`],
3270 [`Path::canonicalize`], [`Path::exists`], [`Path::is_dir`],
3271 [`Path::is_file`], [`Path::metadata`], [`Path::read_dir`],
3272 [`Path::read_link`], [`Path::symlink_metadata`],
3273 [`Utf8Error::valid_up_to`], [`Vec::resize`],
3274 [`VecDeque::as_mut_slices`], [`VecDeque::as_slices`],
3275 [`VecDeque::insert`], [`VecDeque::shrink_to_fit`],
3276 [`VecDeque::swap_remove_back`], [`VecDeque::swap_remove_front`],
3277 [`slice::split_first_mut`], [`slice::split_first`],
3278 [`slice::split_last_mut`], [`slice::split_last`],
3279 [`char::from_u32_unchecked`], [`fs::canonicalize`],
3280 [`str::MatchIndices`], [`str::RMatchIndices`],
3281 [`str::match_indices`], [`str::rmatch_indices`],
3282 [`str::slice_mut_unchecked`], [`string::ParseError`].
3283 * Rust applications hosted on crates.io can be installed locally to
3284 `~/.cargo/bin` with the [`cargo install`] command. Among other
3285 things this makes it easier to augment Cargo with new subcommands:
3286 when a binary named e.g. `cargo-foo` is found in `$PATH` it can be
3287 invoked as `cargo foo`.
3288 * Crates with wildcard (`*`) dependencies will [emit warnings when
3289 published][1.5w]. In 1.6 it will no longer be possible to publish
3290 crates with wildcard dependencies.
3295 * The rules determining when a particular lifetime must outlive
3296 a particular value (known as '[dropck]') have been [modified
3297 to not rely on parametricity][1.5p].
3298 * [Implementations of `AsRef` and `AsMut` were added to `Box`, `Rc`,
3299 and `Arc`][1.5a]. Because these smart pointer types implement
3300 `Deref`, this causes breakage in cases where the interior type
3301 contains methods of the same name.
3302 * [Correct a bug in Rc/Arc][1.5c] that caused [dropck] to be unaware
3303 that they could drop their content. Soundness fix.
3304 * All method invocations are [properly checked][1.5wf1] for
3305 [well-formedness][1.5wf2]. Soundness fix.
3306 * Traits whose supertraits contain `Self` are [not object
3307 safe][1.5o]. Soundness fix.
3308 * Target specifications support a [`no_default_libraries`][1.5nd]
3309 setting that controls whether `-nodefaultlibs` is passed to the
3310 linker, and in turn the `is_like_windows` setting no longer affects
3311 the `-nodefaultlibs` flag.
3312 * `#[derive(Show)]`, long-deprecated, [has been removed][1.5ds].
3313 * The `#[inline]` and `#[repr]` attributes [can only appear
3314 in valid locations][1.5at].
3315 * Native libraries linked from the local crate are [passed to
3316 the linker before native libraries from upstream crates][1.5nl].
3317 * Two rarely-used attributes, `#[no_debug]` and
3318 `#[omit_gdb_pretty_printer_section]` [are feature gated][1.5fg].
3319 * Negation of unsigned integers, which has been a warning for
3320 several releases, [is now behind a feature gate and will
3321 generate errors][1.5nu].
3322 * The parser accidentally accepted visibility modifiers on
3323 enum variants, a bug [which has been fixed][1.5ev].
3324 * [A bug was fixed that allowed `use` statements to import unstable
3330 * When evaluating expressions at compile-time that are not
3331 compile-time constants (const-evaluating expressions in non-const
3332 contexts), incorrect code such as overlong bitshifts and arithmetic
3333 overflow will [generate a warning instead of an error][1.5ce],
3334 delaying the error until runtime. This will allow the
3335 const-evaluator to be expanded in the future backwards-compatibly.
3336 * The `improper_ctypes` lint [no longer warns about using `isize` and
3337 `usize` in FFI][1.5ict].
3342 * `Arc<T>` and `Rc<T>` are [covariant with respect to `T` instead of
3344 * `Default` is [implemented for mutable slices][1.5d].
3345 * `FromStr` is [implemented for `SockAddrV4` and `SockAddrV6`][1.5s].
3346 * There are now `From` conversions [between floating point
3347 types][1.5f] where the conversions are lossless.
3348 * There are now `From` conversions [between integer types][1.5i] where
3349 the conversions are lossless.
3350 * [`fs::Metadata` implements `Clone`][1.5fs].
3351 * The `parse` method [accepts a leading "+" when parsing
3353 * [`AsMut` is implemented for `Vec`][1.5am].
3354 * The `clone_from` implementations for `String` and `BinaryHeap` [have
3355 been optimized][1.5cf] and no longer rely on the default impl.
3356 * The `extern "Rust"`, `extern "C"`, `unsafe extern "Rust"` and
3357 `unsafe extern "C"` function types now [implement `Clone`,
3358 `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and
3359 `fmt::Debug` for up to 12 arguments][1.5fp].
3360 * [Dropping `Vec`s is much faster in unoptimized builds when the
3361 element types don't implement `Drop`][1.5dv].
3362 * A bug that caused in incorrect behavior when [combining `VecDeque`
3363 with zero-sized types][1.5vdz] was resolved.
3364 * [`PartialOrd` for slices is faster][1.5po].
3369 * [Crate metadata size was reduced by 20%][1.5md].
3370 * [Improvements to code generation reduced the size of libcore by 3.3
3371 MB and rustc's memory usage by 18MB][1.5m].
3372 * [Improvements to deref translation increased performance in
3373 unoptimized builds][1.5dr].
3374 * Various errors in trait resolution [are deduplicated to only be
3375 reported once][1.5te].
3376 * Rust has preliminary [support for rumprun kernels][1.5rr].
3377 * Rust has preliminary [support for NetBSD on amd64][1.5na].
3379 [1.5use]: https://github.com/rust-lang/rust/pull/28364
3380 [1.5po]: https://github.com/rust-lang/rust/pull/28436
3381 [1.5ev]: https://github.com/rust-lang/rust/pull/28442
3382 [1.5nu]: https://github.com/rust-lang/rust/pull/28468
3383 [1.5dr]: https://github.com/rust-lang/rust/pull/28491
3384 [1.5vdz]: https://github.com/rust-lang/rust/pull/28494
3385 [1.5md]: https://github.com/rust-lang/rust/pull/28521
3386 [1.5fg]: https://github.com/rust-lang/rust/pull/28522
3387 [1.5dv]: https://github.com/rust-lang/rust/pull/28531
3388 [1.5na]: https://github.com/rust-lang/rust/pull/28543
3389 [1.5fp]: https://github.com/rust-lang/rust/pull/28560
3390 [1.5rr]: https://github.com/rust-lang/rust/pull/28593
3391 [1.5cf]: https://github.com/rust-lang/rust/pull/28602
3392 [1.5nl]: https://github.com/rust-lang/rust/pull/28605
3393 [1.5te]: https://github.com/rust-lang/rust/pull/28645
3394 [1.5at]: https://github.com/rust-lang/rust/pull/28650
3395 [1.5am]: https://github.com/rust-lang/rust/pull/28663
3396 [1.5m]: https://github.com/rust-lang/rust/pull/28778
3397 [1.5ict]: https://github.com/rust-lang/rust/pull/28779
3398 [1.5a]: https://github.com/rust-lang/rust/pull/28811
3399 [1.5pi]: https://github.com/rust-lang/rust/pull/28826
3400 [1.5ce]: https://github.com/rust-lang/rfcs/blob/master/text/1229-compile-time-asserts.md
3401 [1.5p]: https://github.com/rust-lang/rfcs/blob/master/text/1238-nonparametric-dropck.md
3402 [1.5i]: https://github.com/rust-lang/rust/pull/28921
3403 [1.5fs]: https://github.com/rust-lang/rust/pull/29021
3404 [1.5f]: https://github.com/rust-lang/rust/pull/29129
3405 [1.5ds]: https://github.com/rust-lang/rust/pull/29148
3406 [1.5s]: https://github.com/rust-lang/rust/pull/29190
3407 [1.5d]: https://github.com/rust-lang/rust/pull/29245
3408 [1.5o]: https://github.com/rust-lang/rust/pull/29259
3409 [1.5nd]: https://github.com/rust-lang/rust/pull/28578
3410 [1.5wf2]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
3411 [1.5wf1]: https://github.com/rust-lang/rust/pull/28669
3412 [dropck]: https://doc.rust-lang.org/nightly/nomicon/dropck.html
3413 [1.5c]: https://github.com/rust-lang/rust/pull/29110
3414 [1.5w]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
3415 [`cargo install`]: https://github.com/rust-lang/rfcs/blob/master/text/1200-cargo-install.md
3416 [`BinaryHeap::from`]: http://doc.rust-lang.org/nightly/std/convert/trait.From.html#method.from
3417 [`BinaryHeap::into_sorted_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_sorted_vec
3418 [`BinaryHeap::into_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_vec
3419 [`Condvar::wait_timeout`]: http://doc.rust-lang.org/nightly/std/sync/struct.Condvar.html#method.wait_timeout
3420 [`FileTypeExt::is_block_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_block_device
3421 [`FileTypeExt::is_char_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_char_device
3422 [`FileTypeExt::is_fifo`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_fifo
3423 [`FileTypeExt::is_socket`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_socket
3424 [`FileTypeExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html
3425 [`Formatter::alternate`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.alternate
3426 [`Formatter::fill`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.fill
3427 [`Formatter::precision`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.precision
3428 [`Formatter::sign_aware_zero_pad`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_aware_zero_pad
3429 [`Formatter::sign_minus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_minus
3430 [`Formatter::sign_plus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_plus
3431 [`Formatter::width`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.width
3432 [`Iterator::cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.cmp
3433 [`Iterator::eq`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.eq
3434 [`Iterator::ge`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ge
3435 [`Iterator::gt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.gt
3436 [`Iterator::le`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.le
3437 [`Iterator::lt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.lt
3438 [`Iterator::ne`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ne
3439 [`Iterator::partial_cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.partial_cmp
3440 [`Path::canonicalize`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.canonicalize
3441 [`Path::exists`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.exists
3442 [`Path::is_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_dir
3443 [`Path::is_file`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_file
3444 [`Path::metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.metadata
3445 [`Path::read_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_dir
3446 [`Path::read_link`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_link
3447 [`Path::symlink_metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.symlink_metadata
3448 [`Utf8Error::valid_up_to`]: http://doc.rust-lang.org/nightly/core/str/struct.Utf8Error.html#method.valid_up_to
3449 [`Vec::resize`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.resize
3450 [`VecDeque::as_mut_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_mut_slices
3451 [`VecDeque::as_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_slices
3452 [`VecDeque::insert`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.insert
3453 [`VecDeque::shrink_to_fit`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.shrink_to_fit
3454 [`VecDeque::swap_remove_back`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_back
3455 [`VecDeque::swap_remove_front`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_front
3456 [`slice::split_first_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first_mut
3457 [`slice::split_first`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first
3458 [`slice::split_last_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last_mut
3459 [`slice::split_last`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last
3460 [`char::from_u32_unchecked`]: http://doc.rust-lang.org/nightly/std/char/fn.from_u32_unchecked.html
3461 [`fs::canonicalize`]: http://doc.rust-lang.org/nightly/std/fs/fn.canonicalize.html
3462 [`str::MatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.MatchIndices.html
3463 [`str::RMatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.RMatchIndices.html
3464 [`str::match_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.match_indices
3465 [`str::rmatch_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatch_indices
3466 [`str::slice_mut_unchecked`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.slice_mut_unchecked
3467 [`string::ParseError`]: http://doc.rust-lang.org/nightly/std/string/enum.ParseError.html
3469 Version 1.4.0 (2015-10-29)
3470 ==========================
3472 * ~1200 changes, numerous bugfixes
3477 * Windows builds targeting the 64-bit MSVC ABI and linker (instead of
3478 GNU) are now supported and recommended for use.
3483 * [Several changes have been made to fix type soundness and improve
3484 the behavior of associated types][sound]. See [RFC 1214]. Although
3485 we have mostly introduced these changes as warnings this release, to
3486 become errors next release, there are still some scenarios that will
3487 see immediate breakage.
3488 * [The `str::lines` and `BufRead::lines` iterators treat `\r\n` as
3489 line breaks in addition to `\n`][crlf].
3490 * [Loans of `'static` lifetime extend to the end of a function][stat].
3491 * [`str::parse` no longer introduces avoidable rounding error when
3492 parsing floating point numbers. Together with earlier changes to
3493 float formatting/output, "round trips" like f.to_string().parse()
3494 now preserve the value of f exactly. Additionally, leading plus
3495 signs are now accepted][fp3].
3501 * `use` statements that import multiple items [can now rename
3502 them][i], as in `use foo::{bar as kitten, baz as puppy}`.
3503 * [Binops work correctly on fat pointers][binfat].
3504 * `pub extern crate`, which does not behave as expected, [issues a
3505 warning][pec] until a better solution is found.
3510 * [Many APIs were stabilized][stab]: `<Box<str>>::into_string`,
3511 [`Arc::downgrade`], [`Arc::get_mut`], [`Arc::make_mut`],
3512 [`Arc::try_unwrap`], [`Box::from_raw`], [`Box::into_raw`], [`CStr::to_str`],
3513 [`CStr::to_string_lossy`], [`CString::from_raw`], [`CString::into_raw`],
3514 [`IntoRawFd::into_raw_fd`], [`IntoRawFd`],
3515 `IntoRawHandle::into_raw_handle`, `IntoRawHandle`,
3516 `IntoRawSocket::into_raw_socket`, `IntoRawSocket`, [`Rc::downgrade`],
3517 [`Rc::get_mut`], [`Rc::make_mut`], [`Rc::try_unwrap`], [`Result::expect`],
3518 [`String::into_boxed_str`], [`TcpStream::read_timeout`],
3519 [`TcpStream::set_read_timeout`], [`TcpStream::set_write_timeout`],
3520 [`TcpStream::write_timeout`], [`UdpSocket::read_timeout`],
3521 [`UdpSocket::set_read_timeout`], [`UdpSocket::set_write_timeout`],
3522 [`UdpSocket::write_timeout`], `Vec::append`, `Vec::split_off`,
3523 [`VecDeque::append`], [`VecDeque::retain`], [`VecDeque::split_off`],
3524 [`rc::Weak::upgrade`], [`rc::Weak`], [`slice::Iter::as_slice`],
3525 [`slice::IterMut::into_slice`], [`str::CharIndices::as_str`],
3526 [`str::Chars::as_str`], [`str::split_at_mut`], [`str::split_at`],
3527 [`sync::Weak::upgrade`], [`sync::Weak`], [`thread::park_timeout`],
3529 * [Some APIs were deprecated][dep]: `BTreeMap::with_b`,
3530 `BTreeSet::with_b`, `Option::as_mut_slice`, `Option::as_slice`,
3531 `Result::as_mut_slice`, `Result::as_slice`, `f32::from_str_radix`,
3532 `f64::from_str_radix`.
3533 * [Reverse-searching strings is faster with the 'two-way'
3535 * [`std::io::copy` allows `?Sized` arguments][cc].
3536 * The `Windows`, `Chunks`, and `ChunksMut` iterators over slices all
3537 [override `count`, `nth` and `last` with an O(1)
3538 implementation][it].
3539 * [`Default` is implemented for arrays up to `[T; 32]`][d].
3540 * [`IntoRawFd` has been added to the Unix-specific prelude,
3541 `IntoRawSocket` and `IntoRawHandle` to the Windows-specific
3543 * [`Extend<String>` and `FromIterator<String` are both implemented for
3545 * [`IntoIterator` is implemented for references to `Option` and
3547 * [`HashMap` and `HashSet` implement `Extend<&T>` where `T:
3548 Copy`][ext] as part of [RFC 839]. This will cause type inference
3549 breakage in rare situations.
3550 * [`BinaryHeap` implements `Debug`][bh2].
3551 * [`Borrow` and `BorrowMut` are implemented for fixed-size
3553 * [`extern fn`s with the "Rust" and "C" ABIs implement common
3554 traits including `Eq`, `Ord`, `Debug`, `Hash`][fp].
3555 * [String comparison is faster][faststr].
3556 * `&mut T` where `T: std::fmt::Write` [also implements
3557 `std::fmt::Write`][mutw].
3558 * [A stable regression in `VecDeque::push_back` and other
3559 capacity-altering methods that caused panics for zero-sized types
3561 * [Function pointers implement traits for up to 12 parameters][fp2].
3566 * The compiler [no longer uses the 'morestack' feature to prevent
3567 stack overflow][mm]. Instead it uses guard pages and stack
3568 probes (though stack probes are not yet implemented on any platform
3570 * [The compiler matches traits faster when projections are involved][p].
3571 * The 'improper_ctypes' lint [no longer warns about use of `isize` and
3573 * [Cargo now displays useful information about what its doing during
3574 `cargo update`][cu].
3576 [`Arc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.downgrade
3577 [`Arc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.make_mut
3578 [`Arc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.get_mut
3579 [`Arc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.try_unwrap
3580 [`Box::from_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.from_raw
3581 [`Box::into_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.into_raw
3582 [`CStr::to_str`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_str
3583 [`CStr::to_string_lossy`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_string_lossy
3584 [`CString::from_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.from_raw
3585 [`CString::into_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_raw
3586 [`IntoRawFd::into_raw_fd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html#tymethod.into_raw_fd
3587 [`IntoRawFd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html
3588 [`Rc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.downgrade
3589 [`Rc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.get_mut
3590 [`Rc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.make_mut
3591 [`Rc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.try_unwrap
3592 [`Result::expect`]: http://doc.rust-lang.org/nightly/core/result/enum.Result.html#method.expect
3593 [`String::into_boxed_str`]: http://doc.rust-lang.org/nightly/collections/string/struct.String.html#method.into_boxed_str
3594 [`TcpStream::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
3595 [`TcpStream::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
3596 [`TcpStream::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
3597 [`TcpStream::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
3598 [`UdpSocket::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
3599 [`UdpSocket::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
3600 [`UdpSocket::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
3601 [`UdpSocket::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
3602 [`VecDeque::append`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.append
3603 [`VecDeque::retain`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.retain
3604 [`VecDeque::split_off`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.split_off
3605 [`rc::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html#method.upgrade
3606 [`rc::Weak`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html
3607 [`slice::Iter::as_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.Iter.html#method.as_slice
3608 [`slice::IterMut::into_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.IterMut.html#method.into_slice
3609 [`str::CharIndices::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.CharIndices.html#method.as_str
3610 [`str::Chars::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.Chars.html#method.as_str
3611 [`str::split_at_mut`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at_mut
3612 [`str::split_at`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at
3613 [`sync::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html#method.upgrade
3614 [`sync::Weak`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html
3615 [`thread::park_timeout`]: http://doc.rust-lang.org/nightly/std/thread/fn.park_timeout.html
3616 [`thread::sleep`]: http://doc.rust-lang.org/nightly/std/thread/fn.sleep.html
3617 [bh2]: https://github.com/rust-lang/rust/pull/28156
3618 [binfat]: https://github.com/rust-lang/rust/pull/28270
3619 [bm]: https://github.com/rust-lang/rust/pull/28197
3620 [cc]: https://github.com/rust-lang/rust/pull/27531
3621 [crlf]: https://github.com/rust-lang/rust/pull/28034
3622 [cu]: https://github.com/rust-lang/cargo/pull/1931
3623 [d]: https://github.com/rust-lang/rust/pull/27825
3624 [dep]: https://github.com/rust-lang/rust/pull/28339
3625 [es]: https://github.com/rust-lang/rust/pull/27956
3626 [ext]: https://github.com/rust-lang/rust/pull/28094
3627 [faststr]: https://github.com/rust-lang/rust/pull/28338
3628 [ffi]: https://github.com/rust-lang/rust/pull/28779
3629 [fp]: https://github.com/rust-lang/rust/pull/28268
3630 [fp2]: https://github.com/rust-lang/rust/pull/28560
3631 [fp3]: https://github.com/rust-lang/rust/pull/27307
3632 [i]: https://github.com/rust-lang/rust/pull/27451
3633 [into2]: https://github.com/rust-lang/rust/pull/28039
3634 [it]: https://github.com/rust-lang/rust/pull/27652
3635 [mm]: https://github.com/rust-lang/rust/pull/27338
3636 [mutw]: https://github.com/rust-lang/rust/pull/28368
3637 [sound]: https://github.com/rust-lang/rust/pull/27641
3638 [p]: https://github.com/rust-lang/rust/pull/27866
3639 [pec]: https://github.com/rust-lang/rust/pull/28486
3640 [pr]: https://github.com/rust-lang/rust/pull/27896
3641 [RFC 839]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
3642 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
3643 [s]: https://github.com/rust-lang/rust/pull/27474
3644 [stab]: https://github.com/rust-lang/rust/pull/28339
3645 [stat]: https://github.com/rust-lang/rust/pull/28321
3646 [vd]: https://github.com/rust-lang/rust/pull/28494
3648 Version 1.3.0 (2015-09-17)
3649 ==============================
3651 * ~900 changes, numerous bugfixes
3656 * The [new object lifetime defaults][nold] have been [turned
3657 on][nold2] after a cycle of warnings about the change. Now types
3658 like `&'a Box<Trait>` (or `&'a Rc<Trait>`, etc) will change from
3659 being interpreted as `&'a Box<Trait+'a>` to `&'a
3660 Box<Trait+'static>`.
3661 * [The Rustonomicon][nom] is a new book in the official documentation
3662 that dives into writing unsafe Rust.
3663 * The [`Duration`] API, [has been stabilized][ds]. This basic unit of
3664 timekeeping is employed by other std APIs, as well as out-of-tree
3670 * The [new object lifetime defaults][nold] have been [turned
3671 on][nold2] after a cycle of warnings about the change.
3672 * There is a known [regression][lr] in how object lifetime elision is
3673 interpreted, the proper solution for which is undetermined.
3674 * The `#[prelude_import]` attribute, an internal implementation
3675 detail, was accidentally stabilized previously. [It has been put
3676 behind the `prelude_import` feature gate][pi]. This change is
3677 believed to break no existing code.
3678 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
3679 [more sane for dynamically sized types][dst3]. Code that relied on
3680 the previous behavior is thought to be broken.
3681 * The `dropck` rules, which checks that destructors can't access
3682 destroyed values, [have been updated][dropck] to match the
3683 [RFC][dropckrfc]. This fixes some soundness holes, and as such will
3684 cause some previously-compiling code to no longer build.
3689 * The [new object lifetime defaults][nold] have been [turned
3690 on][nold2] after a cycle of warnings about the change.
3691 * Semicolons may [now follow types and paths in
3692 macros](https://github.com/rust-lang/rust/pull/27000).
3693 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
3694 [more sane for dynamically sized types][dst3]. Code that relied on
3695 the previous behavior is not known to exist, and suspected to be
3697 * `'static` variables [may now be recursive][st].
3698 * `ref` bindings choose between [`Deref`] and [`DerefMut`]
3699 implementations correctly.
3700 * The `dropck` rules, which checks that destructors can't access
3701 destroyed values, [have been updated][dropck] to match the
3707 * The [`Duration`] API, [has been stabilized][ds], as well as the
3708 `std::time` module, which presently contains only `Duration`.
3709 * `Box<str>` and `Box<[T]>` both implement `Clone`.
3710 * The owned C string, [`CString`], implements [`Borrow`] and the
3711 borrowed C string, [`CStr`], implements [`ToOwned`]. The two of
3712 these allow C strings to be borrowed and cloned in generic code.
3713 * [`CStr`] implements [`Debug`].
3714 * [`AtomicPtr`] implements [`Debug`].
3715 * [`Error`] trait objects [can be downcast to their concrete types][e]
3716 in many common configurations, using the [`is`], [`downcast`],
3717 [`downcast_ref`] and [`downcast_mut`] methods, similarly to the
3719 * Searching for substrings now [employs the two-way algorithm][search]
3720 instead of doing a naive search. This gives major speedups to a
3721 number of methods, including [`contains`][sc], [`find`][sf],
3722 [`rfind`][srf], [`split`][ss]. [`starts_with`][ssw] and
3723 [`ends_with`][sew] are also faster.
3724 * The performance of `PartialEq` for slices is [much faster][ps].
3725 * The [`Hash`] trait offers the default method, [`hash_slice`], which
3726 is overridden and optimized by the implementations for scalars.
3727 * The [`Hasher`] trait now has a number of specialized `write_*`
3728 methods for primitive types, for efficiency.
3729 * The I/O-specific error type, [`std::io::Error`][ie], gained a set of
3730 methods for accessing the 'inner error', if any: [`get_ref`][iegr],
3731 [`get_mut`][iegm], [`into_inner`][ieii]. As well, the implementation
3732 of [`std::error::Error::cause`][iec] also delegates to the inner
3734 * [`process::Child`][pc] gained the [`id`] method, which returns a
3735 `u32` representing the platform-specific process identifier.
3736 * The [`connect`] method on slices is deprecated, replaced by the new
3737 [`join`] method (note that both of these are on the *unstable*
3738 [`SliceConcatExt`] trait, but through the magic of the prelude are
3739 available to stable code anyway).
3740 * The [`Div`] operator is implemented for [`Wrapping`] types.
3741 * [`DerefMut` is implemented for `String`][dms].
3742 * Performance of SipHash (the default hasher for `HashMap`) is
3743 [better for long data][sh].
3744 * [`AtomicPtr`] implements [`Send`].
3745 * The [`read_to_end`] implementations for [`Stdin`] and [`File`]
3746 are now [specialized to use uninitialized buffers for increased
3748 * Lifetime parameters of foreign functions [are now resolved
3754 * Rust can now, with some coercion, [produce programs that run on
3755 Windows XP][xp], though XP is not considered a supported platform.
3756 * Porting Rust on Windows from the GNU toolchain to MSVC continues
3757 ([1][win1], [2][win2], [3][win3], [4][win4]). It is still not
3758 recommended for use in 1.3, though should be fully-functional
3759 in the [64-bit 1.4 beta][b14].
3760 * On Fedora-based systems installation will [properly configure the
3761 dynamic linker][fl].
3762 * The compiler gained many new extended error descriptions, which can
3763 be accessed with the `--explain` flag.
3764 * The `dropck` pass, which checks that destructors can't access
3765 destroyed values, [has been rewritten][dropck]. This fixes some
3766 soundness holes, and as such will cause some previously-compiling
3767 code to no longer build.
3768 * `rustc` now uses [LLVM to write archive files where possible][ar].
3769 Eventually this will eliminate the compiler's dependency on the ar
3771 * Rust has [preliminary support for i686 FreeBSD][fb] (it has long
3772 supported FreeBSD on x86_64).
3773 * The [`unused_mut`][lum], [`unconditional_recursion`][lur],
3774 [`improper_ctypes`][lic], and [`negate_unsigned`][lnu] lints are
3776 * If landing pads are disabled (with `-Z no-landing-pads`), [`panic!`
3777 will kill the process instead of leaking][nlp].
3779 [`Any`]: http://doc.rust-lang.org/nightly/std/any/trait.Any.html
3780 [`AtomicPtr`]: http://doc.rust-lang.org/nightly/std/sync/atomic/struct.AtomicPtr.html
3781 [`Borrow`]: http://doc.rust-lang.org/nightly/std/borrow/trait.Borrow.html
3782 [`CStr`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html
3783 [`CString`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html
3784 [`Debug`]: http://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
3785 [`DerefMut`]: http://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
3786 [`Deref`]: http://doc.rust-lang.org/nightly/std/ops/trait.Deref.html
3787 [`Div`]: http://doc.rust-lang.org/nightly/std/ops/trait.Div.html
3788 [`Duration`]: http://doc.rust-lang.org/nightly/std/time/struct.Duration.html
3789 [`Error`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html
3790 [`File`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html
3791 [`Hash`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html
3792 [`Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
3793 [`Send`]: http://doc.rust-lang.org/nightly/std/marker/trait.Send.html
3794 [`SliceConcatExt`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html
3795 [`Stdin`]: http://doc.rust-lang.org/nightly/std/io/struct.Stdin.html
3796 [`ToOwned`]: http://doc.rust-lang.org/nightly/std/borrow/trait.ToOwned.html
3797 [`Wrapping`]: http://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
3798 [`connect`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.connect
3799 [`downcast_mut`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_mut
3800 [`downcast_ref`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_ref
3801 [`downcast`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast
3802 [`hash_slice`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
3803 [`id`]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html#method.id
3804 [`is`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.is
3805 [`join`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.join
3806 [`read_to_end`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_to_end
3807 [ar]: https://github.com/rust-lang/rust/pull/26926
3808 [b14]: https://static.rust-lang.org/dist/rust-beta-x86_64-pc-windows-msvc.msi
3809 [dms]: https://github.com/rust-lang/rust/pull/26241
3810 [dropck]: https://github.com/rust-lang/rust/pull/27261
3811 [dropckrfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
3812 [ds]: https://github.com/rust-lang/rust/pull/26818
3813 [dst1]: http://doc.rust-lang.org/nightly/std/mem/fn.size_of_val.html
3814 [dst2]: http://doc.rust-lang.org/nightly/std/mem/fn.align_of_val.html
3815 [dst3]: https://github.com/rust-lang/rust/pull/27351
3816 [e]: https://github.com/rust-lang/rust/pull/24793
3817 [f]: https://github.com/rust-lang/rust/pull/26588
3818 [fb]: https://github.com/rust-lang/rust/pull/26959
3819 [fl]: https://github.com/rust-lang/rust-installer/pull/41
3820 [hs]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
3821 [ie]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html
3822 [iec]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.cause
3823 [iegm]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_mut
3824 [iegr]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_ref
3825 [ieii]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.into_inner
3826 [lic]: https://github.com/rust-lang/rust/pull/26583
3827 [lnu]: https://github.com/rust-lang/rust/pull/27026
3828 [lr]: https://github.com/rust-lang/rust/issues/27248
3829 [lum]: https://github.com/rust-lang/rust/pull/26378
3830 [lur]: https://github.com/rust-lang/rust/pull/26783
3831 [nlp]: https://github.com/rust-lang/rust/pull/27176
3832 [nold2]: https://github.com/rust-lang/rust/pull/27045
3833 [nold]: https://github.com/rust-lang/rfcs/blob/master/text/1156-adjust-default-object-bounds.md
3834 [nom]: http://doc.rust-lang.org/nightly/nomicon/
3835 [pc]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html
3836 [pi]: https://github.com/rust-lang/rust/pull/26699
3837 [ps]: https://github.com/rust-lang/rust/pull/26884
3838 [rte]: https://github.com/rust-lang/rust/pull/26950
3839 [sc]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.contains
3840 [search]: https://github.com/rust-lang/rust/pull/26327
3841 [sew]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.ends_with
3842 [sf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.find
3843 [sh]: https://github.com/rust-lang/rust/pull/27280
3844 [srf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rfind
3845 [ss]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split
3846 [ssw]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.starts_with
3847 [st]: https://github.com/rust-lang/rust/pull/26630
3848 [win1]: https://github.com/rust-lang/rust/pull/26569
3849 [win2]: https://github.com/rust-lang/rust/pull/26741
3850 [win3]: https://github.com/rust-lang/rust/pull/26741
3851 [win4]: https://github.com/rust-lang/rust/pull/27210
3852 [xp]: https://github.com/rust-lang/rust/pull/26569
3854 Version 1.2.0 (2015-08-07)
3855 ==========================
3857 * ~1200 changes, numerous bugfixes
3862 * [Dynamically-sized-type coercions][dst] allow smart pointer types
3863 like `Rc` to contain types without a fixed size, arrays and trait
3864 objects, finally enabling use of `Rc<[T]>` and completing the
3865 implementation of DST.
3866 * [Parallel codegen][parcodegen] is now working again, which can
3867 substantially speed up large builds in debug mode; It also gets
3868 another ~33% speedup when bootstrapping on a 4 core machine (using 8
3869 jobs). It's not enabled by default, but will be "in the near
3870 future". It can be activated with the `-C codegen-units=N` flag to
3872 * This is the first release with [experimental support for linking
3873 with the MSVC linker and lib C on Windows (instead of using the GNU
3874 variants via MinGW)][win]. It is yet recommended only for the most
3875 intrepid Rustaceans.
3876 * Benchmark compilations are showing a 30% improvement in
3877 bootstrapping over 1.1.
3882 * The [`to_uppercase`] and [`to_lowercase`] methods on `char` now do
3883 unicode case mapping, which is a previously-planned change in
3884 behavior and considered a bugfix.
3885 * [`mem::align_of`] now specifies [the *minimum alignment* for
3886 T][align], which is usually the alignment programs are interested
3887 in, and the same value reported by clang's
3888 `alignof`. [`mem::min_align_of`] is deprecated. This is not known to
3890 * [The `#[packed]` attribute is no longer silently accepted by the
3891 compiler][packed]. This attribute did nothing and code that
3892 mentioned it likely did not work as intended.
3893 * Associated type defaults are [now behind the
3894 `associated_type_defaults` feature gate][ad]. In 1.1 associated type
3895 defaults *did not work*, but could be mentioned syntactically. As
3896 such this breakage has minimal impact.
3901 * Patterns with `ref mut` now correctly invoke [`DerefMut`] when
3902 matching against dereferencable values.
3907 * The [`Extend`] trait, which grows a collection from an iterator, is
3908 implemented over iterators of references, for `String`, `Vec`,
3909 `LinkedList`, `VecDeque`, `EnumSet`, `BinaryHeap`, `VecMap`,
3910 `BTreeSet` and `BTreeMap`. [RFC][extend-rfc].
3911 * The [`iter::once`] function returns an iterator that yields a single
3912 element, and [`iter::empty`] returns an iterator that yields no
3914 * The [`matches`] and [`rmatches`] methods on `str` return iterators
3915 over substring matches.
3916 * [`Cell`] and [`RefCell`] both implement `Eq`.
3917 * A number of methods for wrapping arithmetic are added to the
3918 integral types, [`wrapping_div`], [`wrapping_rem`],
3919 [`wrapping_neg`], [`wrapping_shl`], [`wrapping_shr`]. These are in
3920 addition to the existing [`wrapping_add`], [`wrapping_sub`], and
3921 [`wrapping_mul`] methods, and alternatives to the [`Wrapping`]
3922 type.. It is illegal for the default arithmetic operations in Rust
3923 to overflow; the desire to wrap must be explicit.
3924 * The `{:#?}` formatting specifier [displays the alternate,
3925 pretty-printed][debugfmt] form of the `Debug` formatter. This
3926 feature was actually introduced prior to 1.0 with little
3928 * [`fmt::Formatter`] implements [`fmt::Write`], a `fmt`-specific trait
3929 for writing data to formatted strings, similar to [`io::Write`].
3930 * [`fmt::Formatter`] adds 'debug builder' methods, [`debug_struct`],
3931 [`debug_tuple`], [`debug_list`], [`debug_set`], [`debug_map`]. These
3932 are used by code generators to emit implementations of [`Debug`].
3933 * `str` has new [`to_uppercase`][strup] and [`to_lowercase`][strlow]
3934 methods that convert case, following Unicode case mapping.
3935 * It is now easier to handle poisoned locks. The [`PoisonError`]
3936 type, returned by failing lock operations, exposes `into_inner`,
3937 `get_ref`, and `get_mut`, which all give access to the inner lock
3938 guard, and allow the poisoned lock to continue to operate. The
3939 `is_poisoned` method of [`RwLock`] and [`Mutex`] can poll for a
3940 poisoned lock without attempting to take the lock.
3941 * On Unix the [`FromRawFd`] trait is implemented for [`Stdio`], and
3942 [`AsRawFd`] for [`ChildStdin`], [`ChildStdout`], [`ChildStderr`].
3943 On Windows the `FromRawHandle` trait is implemented for `Stdio`,
3944 and `AsRawHandle` for `ChildStdin`, `ChildStdout`,
3946 * [`io::ErrorKind`] has a new variant, `InvalidData`, which indicates
3952 * `rustc` employs smarter heuristics for guessing at [typos].
3953 * `rustc` emits more efficient code for [no-op conversions between
3954 unsafe pointers][nop].
3955 * Fat pointers are now [passed in pairs of immediate arguments][fat],
3956 resulting in faster compile times and smaller code.
3958 [`Extend`]: https://doc.rust-lang.org/nightly/std/iter/trait.Extend.html
3959 [extend-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
3960 [`iter::once`]: https://doc.rust-lang.org/nightly/std/iter/fn.once.html
3961 [`iter::empty`]: https://doc.rust-lang.org/nightly/std/iter/fn.empty.html
3962 [`matches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.matches
3963 [`rmatches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatches
3964 [`Cell`]: https://doc.rust-lang.org/nightly/std/cell/struct.Cell.html
3965 [`RefCell`]: https://doc.rust-lang.org/nightly/std/cell/struct.RefCell.html
3966 [`wrapping_add`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_add
3967 [`wrapping_sub`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_sub
3968 [`wrapping_mul`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_mul
3969 [`wrapping_div`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_div
3970 [`wrapping_rem`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_rem
3971 [`wrapping_neg`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_neg
3972 [`wrapping_shl`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shl
3973 [`wrapping_shr`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shr
3974 [`Wrapping`]: https://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
3975 [`fmt::Formatter`]: https://doc.rust-lang.org/nightly/std/fmt/struct.Formatter.html
3976 [`fmt::Write`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Write.html
3977 [`io::Write`]: https://doc.rust-lang.org/nightly/std/io/trait.Write.html
3978 [`debug_struct`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_struct
3979 [`debug_tuple`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_tuple
3980 [`debug_list`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_list
3981 [`debug_set`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_set
3982 [`debug_map`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_map
3983 [`Debug`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
3984 [strup]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_uppercase
3985 [strlow]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_lowercase
3986 [`to_uppercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_uppercase
3987 [`to_lowercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_lowercase
3988 [`PoisonError`]: https://doc.rust-lang.org/nightly/std/sync/struct.PoisonError.html
3989 [`RwLock`]: https://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html
3990 [`Mutex`]: https://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html
3991 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
3992 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
3993 [`Stdio`]: https://doc.rust-lang.org/nightly/std/process/struct.Stdio.html
3994 [`ChildStdin`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdin.html
3995 [`ChildStdout`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdout.html
3996 [`ChildStderr`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStderr.html
3997 [`io::ErrorKind`]: https://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html
3998 [debugfmt]: https://www.reddit.com/r/rust/comments/3ceaui/psa_produces_prettyprinted_debug_output/
3999 [`DerefMut`]: https://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
4000 [`mem::align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.align_of.html
4001 [align]: https://github.com/rust-lang/rust/pull/25646
4002 [`mem::min_align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.min_align_of.html
4003 [typos]: https://github.com/rust-lang/rust/pull/26087
4004 [nop]: https://github.com/rust-lang/rust/pull/26336
4005 [fat]: https://github.com/rust-lang/rust/pull/26411
4006 [dst]: https://github.com/rust-lang/rfcs/blob/master/text/0982-dst-coercion.md
4007 [parcodegen]: https://github.com/rust-lang/rust/pull/26018
4008 [packed]: https://github.com/rust-lang/rust/pull/25541
4009 [ad]: https://github.com/rust-lang/rust/pull/27382
4010 [win]: https://github.com/rust-lang/rust/pull/25350
4012 Version 1.1.0 (2015-06-25)
4013 =========================
4015 * ~850 changes, numerous bugfixes
4020 * The [`std::fs` module has been expanded][fs] to expand the set of
4021 functionality exposed:
4022 * `DirEntry` now supports optimizations like `file_type` and `metadata` which
4023 don't incur a syscall on some platforms.
4024 * A `symlink_metadata` function has been added.
4025 * The `fs::Metadata` structure now lowers to its OS counterpart, providing
4026 access to all underlying information.
4027 * The compiler now contains extended explanations of many errors. When an error
4028 with an explanation occurs the compiler suggests using the `--explain` flag
4029 to read the explanation. Error explanations are also [available online][err-index].
4030 * Thanks to multiple [improvements][sk] to [type checking][pre], as
4031 well as other work, the time to bootstrap the compiler decreased by
4037 * The [`str::split_whitespace`] method splits a string on unicode
4038 whitespace boundaries.
4039 * On both Windows and Unix, new extension traits provide conversion of
4040 I/O types to and from the underlying system handles. On Unix, these
4041 traits are [`FromRawFd`] and [`AsRawFd`], on Windows `FromRawHandle`
4042 and `AsRawHandle`. These are implemented for `File`, `TcpStream`,
4043 `TcpListener`, and `UpdSocket`. Further implementations for
4044 `std::process` will be stabilized later.
4045 * On Unix, [`std::os::unix::symlink`] creates symlinks. On
4046 Windows, symlinks can be created with
4047 `std::os::windows::symlink_dir` and
4048 `std::os::windows::symlink_file`.
4049 * The `mpsc::Receiver` type can now be converted into an iterator with
4050 `into_iter` on the [`IntoIterator`] trait.
4051 * `Ipv4Addr` can be created from `u32` with the `From<u32>`
4052 implementation of the [`From`] trait.
4053 * The `Debug` implementation for `RangeFull` [creates output that is
4054 more consistent with other implementations][rf].
4055 * [`Debug` is implemented for `File`][file].
4056 * The `Default` implementation for `Arc` [no longer requires `Sync +
4058 * [The `Iterator` methods `count`, `nth`, and `last` have been
4059 overridden for slices to have O(1) performance instead of O(n)][si].
4060 * Incorrect handling of paths on Windows has been improved in both the
4061 compiler and the standard library.
4062 * [`AtomicPtr` gained a `Default` implementation][ap].
4063 * In accordance with Rust's policy on arithmetic overflow `abs` now
4064 [panics on overflow when debug assertions are enabled][abs].
4065 * The [`Cloned`] iterator, which was accidentally left unstable for
4066 1.0 [has been stabilized][c].
4067 * The [`Incoming`] iterator, which iterates over incoming TCP
4068 connections, and which was accidentally unnamable in 1.0, [is now
4069 properly exported][inc].
4070 * [`BinaryHeap`] no longer corrupts itself [when functions called by
4071 `sift_up` or `sift_down` panic][bh].
4072 * The [`split_off`] method of `LinkedList` [no longer corrupts
4073 the list in certain scenarios][ll].
4078 * Type checking performance [has improved notably][sk] with
4079 [multiple improvements][pre].
4080 * The compiler [suggests code changes][ch] for more errors.
4081 * rustc and it's build system have experimental support for [building
4082 toolchains against MUSL][m] instead of glibc on Linux.
4083 * The compiler defines the `target_env` cfg value, which is used for
4084 distinguishing toolchains that are otherwise for the same
4085 platform. Presently this is set to `gnu` for common GNU Linux
4086 targets and for MinGW targets, and `musl` for MUSL Linux targets.
4087 * The [`cargo rustc`][crc] command invokes a build with custom flags
4089 * [Android executables are always position independent][pie].
4090 * [The `drop_with_repr_extern` lint warns about mixing `repr(C)`
4093 [`str::split_whitespace`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_whitespace
4094 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
4095 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
4096 [`std::os::unix::symlink`]: https://doc.rust-lang.org/nightly/std/os/unix/fs/fn.symlink.html
4097 [`IntoIterator`]: https://doc.rust-lang.org/nightly/std/iter/trait.IntoIterator.html
4098 [`From`]: https://doc.rust-lang.org/nightly/std/convert/trait.From.html
4099 [rf]: https://github.com/rust-lang/rust/pull/24491
4100 [err-index]: https://doc.rust-lang.org/error-index.html
4101 [sk]: https://github.com/rust-lang/rust/pull/24615
4102 [pre]: https://github.com/rust-lang/rust/pull/25323
4103 [file]: https://github.com/rust-lang/rust/pull/24598
4104 [ch]: https://github.com/rust-lang/rust/pull/24683
4105 [arc]: https://github.com/rust-lang/rust/pull/24695
4106 [si]: https://github.com/rust-lang/rust/pull/24701
4107 [ap]: https://github.com/rust-lang/rust/pull/24834
4108 [m]: https://github.com/rust-lang/rust/pull/24777
4109 [fs]: https://github.com/rust-lang/rfcs/blob/master/text/1044-io-fs-2.1.md
4110 [crc]: https://github.com/rust-lang/cargo/pull/1568
4111 [pie]: https://github.com/rust-lang/rust/pull/24953
4112 [abs]: https://github.com/rust-lang/rust/pull/25441
4113 [c]: https://github.com/rust-lang/rust/pull/25496
4114 [`Cloned`]: https://doc.rust-lang.org/nightly/std/iter/struct.Cloned.html
4115 [`Incoming`]: https://doc.rust-lang.org/nightly/std/net/struct.Incoming.html
4116 [inc]: https://github.com/rust-lang/rust/pull/25522
4117 [bh]: https://github.com/rust-lang/rust/pull/25856
4118 [`BinaryHeap`]: https://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html
4119 [ll]: https://github.com/rust-lang/rust/pull/26022
4120 [`split_off`]: https://doc.rust-lang.org/nightly/collections/linked_list/struct.LinkedList.html#method.split_off
4121 [drop]: https://github.com/rust-lang/rust/pull/24935
4123 Version 1.0.0 (2015-05-15)
4124 ========================
4126 * ~1500 changes, numerous bugfixes
4131 * The vast majority of the standard library is now `#[stable]`. It is
4132 no longer possible to use unstable features with a stable build of
4134 * Many popular crates on [crates.io] now work on the stable release
4136 * Arithmetic on basic integer types now [checks for overflow in debug
4142 * Several [restrictions have been added to trait coherence][coh] in
4143 order to make it easier for upstream authors to change traits
4144 without breaking downstream code.
4145 * Digits of binary and octal literals are [lexed more eagerly][lex] to
4146 improve error messages and macro behavior. For example, `0b1234` is
4147 now lexed as `0b1234` instead of two tokens, `0b1` and `234`.
4148 * Trait bounds [are always invariant][inv], eliminating the need for
4149 the `PhantomFn` and `MarkerTrait` lang items, which have been
4151 * ["-" is no longer a valid character in crate names][cr], the `extern crate
4152 "foo" as bar` syntax has been replaced with `extern crate foo as
4153 bar`, and Cargo now automatically translates "-" in *package* names
4154 to underscore for the crate name.
4155 * [Lifetime shadowing is an error][lt].
4156 * [`Send` no longer implies `'static`][send-rfc].
4157 * [UFCS now supports trait-less associated paths][moar-ufcs] like
4158 `MyType::default()`.
4159 * Primitive types [now have inherent methods][prim-inherent],
4160 obviating the need for extension traits like `SliceExt`.
4161 * Methods with `Self: Sized` in their `where` clause are [considered
4162 object-safe][self-sized], allowing many extension traits like
4163 `IteratorExt` to be merged into the traits they extended.
4164 * You can now [refer to associated types][assoc-where] whose
4165 corresponding trait bounds appear only in a `where` clause.
4166 * The final bits of [OIBIT landed][oibit-final], meaning that traits
4167 like `Send` and `Sync` are now library-defined.
4168 * A [Reflect trait][reflect] was introduced, which means that
4169 downcasting via the `Any` trait is effectively limited to concrete
4170 types. This helps retain the potentially-important "parametricity"
4171 property: generic code cannot behave differently for different type
4172 arguments except in minor ways.
4173 * The `unsafe_destructor` feature is now deprecated in favor of the
4174 [new `dropck`][dropck]. This change is a major reduction in unsafe
4180 * The `thread_local` module [has been renamed to `std::thread`][th].
4181 * The methods of `IteratorExt` [have been moved to the `Iterator`
4183 * Several traits that implement Rust's conventions for type
4184 conversions, `AsMut`, `AsRef`, `From`, and `Into` have been
4185 [centralized in the `std::convert` module][con].
4186 * The `FromError` trait [was removed in favor of `From`][fe].
4187 * The basic sleep function [has moved to
4188 `std::thread::sleep_ms`][slp].
4189 * The `splitn` function now takes an `n` parameter that represents the
4190 number of items yielded by the returned iterator [instead of the
4191 number of 'splits'][spl].
4192 * [On Unix, all file descriptors are `CLOEXEC` by default][clo].
4193 * [Derived implementations of `PartialOrd` now order enums according
4194 to their explicitly-assigned discriminants][po].
4195 * [Methods for searching strings are generic over `Pattern`s][pat],
4196 implemented presently by `&char`, `&str`, `FnMut(char) -> bool` and
4198 * [In method resolution, object methods are resolved before inherent
4200 * [`String::from_str` has been deprecated in favor of the `From` impl,
4201 `String::from`][sf].
4202 * [`io::Error` implements `Sync`][ios].
4203 * [The `words` method on `&str` has been replaced with
4204 `split_whitespace`][sw], to avoid answering the tricky question, 'what is
4206 * The new path and IO modules are complete and `#[stable]`. This
4207 was the major library focus for this cycle.
4208 * The path API was [revised][path-normalize] to normalize `.`,
4209 adjusting the tradeoffs in favor of the most common usage.
4210 * A large number of remaining APIs in `std` were also stabilized
4211 during this cycle; about 75% of the non-deprecated API surface
4213 * The new [string pattern API][string-pattern] landed, which makes
4214 the string slice API much more internally consistent and flexible.
4215 * A new set of [generic conversion traits][conversion] replaced
4216 many existing ad hoc traits.
4217 * Generic numeric traits were [completely removed][num-traits]. This
4218 was made possible thanks to inherent methods for primitive types,
4219 and the removal gives maximal flexibility for designing a numeric
4220 hierarchy in the future.
4221 * The `Fn` traits are now related via [inheritance][fn-inherit]
4222 and provide ergonomic [blanket implementations][fn-blanket].
4223 * The `Index` and `IndexMut` traits were changed to
4224 [take the index by value][index-value], enabling code like
4225 `hash_map["string"]` to work.
4226 * `Copy` now [inherits][copy-clone] from `Clone`, meaning that all
4227 `Copy` data is known to be `Clone` as well.
4232 * Many errors now have extended explanations that can be accessed with
4233 the `--explain` flag to `rustc`.
4234 * Many new examples have been added to the standard library
4236 * rustdoc has received a number of improvements focused on completion
4238 * Metadata was tuned, shrinking binaries [by 27%][metadata-shrink].
4239 * Much headway was made on ecosystem-wide CI, making it possible
4240 to [compare builds for breakage][ci-compare].
4243 [crates.io]: http://crates.io
4244 [clo]: https://github.com/rust-lang/rust/pull/24034
4245 [coh]: https://github.com/rust-lang/rfcs/blob/master/text/1023-rebalancing-coherence.md
4246 [con]: https://github.com/rust-lang/rust/pull/23875
4247 [cr]: https://github.com/rust-lang/rust/pull/23419
4248 [fe]: https://github.com/rust-lang/rust/pull/23879
4249 [ie]: https://github.com/rust-lang/rust/pull/23300
4250 [inv]: https://github.com/rust-lang/rust/pull/23938
4251 [ios]: https://github.com/rust-lang/rust/pull/24133
4252 [lex]: https://github.com/rust-lang/rfcs/blob/master/text/0879-small-base-lexing.md
4253 [lt]: https://github.com/rust-lang/rust/pull/24057
4254 [meth]: https://github.com/rust-lang/rust/pull/24056
4255 [pat]: https://github.com/rust-lang/rfcs/blob/master/text/0528-string-patterns.md
4256 [po]: https://github.com/rust-lang/rust/pull/24270
4257 [sf]: https://github.com/rust-lang/rust/pull/24517
4258 [slp]: https://github.com/rust-lang/rust/pull/23949
4259 [spl]: https://github.com/rust-lang/rfcs/blob/master/text/0979-align-splitn-with-other-languages.md
4260 [sw]: https://github.com/rust-lang/rfcs/blob/master/text/1054-str-words.md
4261 [th]: https://github.com/rust-lang/rfcs/blob/master/text/0909-move-thread-local-to-std-thread.md
4262 [send-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0458-send-improvements.md
4263 [moar-ufcs]: https://github.com/rust-lang/rust/pull/22172
4264 [prim-inherent]: https://github.com/rust-lang/rust/pull/23104
4265 [overflow]: https://github.com/rust-lang/rfcs/blob/master/text/0560-integer-overflow.md
4266 [metadata-shrink]: https://github.com/rust-lang/rust/pull/22971
4267 [self-sized]: https://github.com/rust-lang/rust/pull/22301
4268 [assoc-where]: https://github.com/rust-lang/rust/pull/22512
4269 [string-pattern]: https://github.com/rust-lang/rust/pull/22466
4270 [oibit-final]: https://github.com/rust-lang/rust/pull/21689
4271 [reflect]: https://github.com/rust-lang/rust/pull/23712
4272 [conversion]: https://github.com/rust-lang/rfcs/pull/529
4273 [num-traits]: https://github.com/rust-lang/rust/pull/23549
4274 [index-value]: https://github.com/rust-lang/rust/pull/23601
4275 [dropck]: https://github.com/rust-lang/rfcs/pull/769
4276 [ci-compare]: https://gist.github.com/brson/a30a77836fbec057cbee
4277 [fn-inherit]: https://github.com/rust-lang/rust/pull/23282
4278 [fn-blanket]: https://github.com/rust-lang/rust/pull/23895
4279 [copy-clone]: https://github.com/rust-lang/rust/pull/23860
4280 [path-normalize]: https://github.com/rust-lang/rust/pull/23229
4283 Version 1.0.0-alpha.2 (2015-02-20)
4284 =====================================
4286 * ~1300 changes, numerous bugfixes
4290 * The various I/O modules were [overhauled][io-rfc] to reduce
4291 unnecessary abstractions and provide better interoperation with
4292 the underlying platform. The old `io` module remains temporarily
4294 * The standard library now [participates in feature gating][feat],
4295 so use of unstable libraries now requires a `#![feature(...)]`
4296 attribute. The impact of this change is [described on the
4297 forum][feat-forum]. [RFC][feat-rfc].
4301 * `for` loops [now operate on the `IntoIterator` trait][into],
4302 which eliminates the need to call `.iter()`, etc. to iterate
4303 over collections. There are some new subtleties to remember
4304 though regarding what sort of iterators various types yield, in
4305 particular that `for foo in bar { }` yields values from a move
4306 iterator, destroying the original collection. [RFC][into-rfc].
4307 * Objects now have [default lifetime bounds][obj], so you don't
4308 have to write `Box<Trait+'static>` when you don't care about
4309 storing references. [RFC][obj-rfc].
4310 * In types that implement `Drop`, [lifetimes must outlive the
4311 value][drop]. This will soon make it possible to safely
4312 implement `Drop` for types where `#[unsafe_destructor]` is now
4313 required. Read the [gorgeous RFC][drop-rfc] for details.
4314 * The fully qualified <T as Trait>::X syntax lets you set the Self
4315 type for a trait method or associated type. [RFC][ufcs-rfc].
4316 * References to types that implement `Deref<U>` now [automatically
4317 coerce to references][deref] to the dereferenced type `U`,
4318 e.g. `&T where T: Deref<U>` automatically coerces to `&U`. This
4319 should eliminate many unsightly uses of `&*`, as when converting
4320 from references to vectors into references to
4321 slices. [RFC][deref-rfc].
4322 * The explicit [closure kind syntax][close] (`|&:|`, `|&mut:|`,
4323 `|:|`) is obsolete and closure kind is inferred from context.
4324 * [`Self` is a keyword][Self].
4328 * The `Show` and `String` formatting traits [have been
4329 renamed][fmt] to `Debug` and `Display` to more clearly reflect
4330 their related purposes. Automatically getting a string
4331 conversion to use with `format!("{:?}", something_to_debug)` is
4332 now written `#[derive(Debug)]`.
4333 * Abstract [OS-specific string types][osstr], `std::ff::{OsString,
4334 OsStr}`, provide strings in platform-specific encodings for easier
4335 interop with system APIs. [RFC][osstr-rfc].
4336 * The `boxed::into_raw` and `Box::from_raw` functions [convert
4337 between `Box<T>` and `*mut T`][boxraw], a common pattern for
4338 creating raw pointers.
4342 * Certain long error messages of the form 'expected foo found bar'
4343 are now [split neatly across multiple
4344 lines][multiline]. Examples in the PR.
4345 * On Unix Rust can be [uninstalled][un] by running
4346 `/usr/local/lib/rustlib/uninstall.sh`.
4347 * The `#[rustc_on_unimplemented]` attribute, requiring the
4348 'on_unimplemented' feature, lets rustc [display custom error
4349 messages when a trait is expected to be implemented for a type
4354 * Rust is tested against a [LALR grammar][lalr], which parses
4355 almost all the Rust files that rustc does.
4357 [boxraw]: https://github.com/rust-lang/rust/pull/21318
4358 [close]: https://github.com/rust-lang/rust/pull/21843
4359 [deref]: https://github.com/rust-lang/rust/pull/21351
4360 [deref-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0241-deref-conversions.md
4361 [drop]: https://github.com/rust-lang/rust/pull/21972
4362 [drop-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
4363 [feat]: https://github.com/rust-lang/rust/pull/21248
4364 [feat-forum]: https://users.rust-lang.org/t/psa-important-info-about-rustcs-new-feature-staging/82/5
4365 [feat-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0507-release-channels.md
4366 [fmt]: https://github.com/rust-lang/rust/pull/21457
4367 [into]: https://github.com/rust-lang/rust/pull/20790
4368 [into-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md#intoiterator-and-iterable
4369 [io-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
4370 [lalr]: https://github.com/rust-lang/rust/pull/21452
4371 [multiline]: https://github.com/rust-lang/rust/pull/19870
4372 [obj]: https://github.com/rust-lang/rust/pull/22230
4373 [obj-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0599-default-object-bound.md
4374 [onun]: https://github.com/rust-lang/rust/pull/20889
4375 [osstr]: https://github.com/rust-lang/rust/pull/21488
4376 [osstr-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
4377 [Self]: https://github.com/rust-lang/rust/pull/22158
4378 [ufcs-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0132-ufcs.md
4379 [un]: https://github.com/rust-lang/rust/pull/22256
4382 Version 1.0.0-alpha (2015-01-09)
4383 ==================================
4385 * ~2400 changes, numerous bugfixes
4389 * The language itself is considered feature complete for 1.0,
4390 though there will be many usability improvements and bugfixes
4391 before the final release.
4392 * Nearly 50% of the public API surface of the standard library has
4393 been declared 'stable'. Those interfaces are unlikely to change
4395 * The long-running debate over integer types has been
4396 [settled][ints]: Rust will ship with types named `isize` and
4397 `usize`, rather than `int` and `uint`, for pointer-sized
4398 integers. Guidelines will be rolled out during the alpha cycle.
4399 * Most crates that are not `std` have been moved out of the Rust
4400 distribution into the Cargo ecosystem so they can evolve
4401 separately and don't need to be stabilized as quickly, including
4402 'time', 'getopts', 'num', 'regex', and 'term'.
4403 * Documentation continues to be expanded with more API coverage, more
4404 examples, and more in-depth explanations. The guides have been
4405 consolidated into [The Rust Programming Language][trpl].
4406 * "[Rust By Example][rbe]" is now maintained by the Rust team.
4407 * All official Rust binary installers now come with [Cargo], the
4408 Rust package manager.
4412 * Closures have been [completely redesigned][unboxed] to be
4413 implemented in terms of traits, can now be used as generic type
4414 bounds and thus monomorphized and inlined, or via an opaque
4415 pointer (boxed) as in the old system. The new system is often
4416 referred to as 'unboxed' closures.
4417 * Traits now support [associated types][assoc], allowing families
4418 of related types to be defined together and used generically in
4420 * Enum variants are [namespaced by their type names][enum].
4421 * [`where` clauses][where] provide a more versatile and attractive
4422 syntax for specifying generic bounds, though the previous syntax
4424 * Rust again picks a [fallback][fb] (either i32 or f64) for uninferred
4426 * Rust [no longer has a runtime][rt] of any description, and only
4427 supports OS threads, not green threads.
4428 * At long last, Rust has been overhauled for 'dynamically-sized
4429 types' ([DST]), which integrates 'fat pointers' (object types,
4430 arrays, and `str`) more deeply into the type system, making it
4432 * Rust now has a general [range syntax][range], `i..j`, `i..`, and
4433 `..j` that produce range types and which, when combined with the
4434 `Index` operator and multidispatch, leads to a convenient slice
4436 * The new range syntax revealed an ambiguity in the fixed-length
4437 array syntax, so now fixed length arrays [are written `[T;
4439 * The `Copy` trait is no longer implemented automatically. Unsafe
4440 pointers no longer implement `Sync` and `Send` so types
4441 containing them don't automatically either. `Sync` and `Send`
4442 are now 'unsafe traits' so one can "forcibly" implement them via
4443 `unsafe impl` if a type confirms to the requirements for them
4444 even though the internals do not (e.g. structs containing unsafe
4445 pointers like `Arc`). These changes are intended to prevent some
4446 footguns and are collectively known as [opt-in built-in
4447 traits][oibit] (though `Sync` and `Send` will soon become pure
4448 library types unknown to the compiler).
4449 * Operator traits now take their operands [by value][ops], and
4450 comparison traits can use multidispatch to compare one type
4451 against multiple other types, allowing e.g. `String` to be
4452 compared with `&str`.
4453 * `if let` and `while let` are no longer feature-gated.
4454 * Rust has adopted a more [uniform syntax for escaping unicode
4455 characters][unicode].
4456 * `macro_rules!` [has been declared stable][mac]. Though it is a
4457 flawed system it is sufficiently popular that it must be usable
4458 for 1.0. Effort has gone into [future-proofing][mac-future] it
4459 in ways that will allow other macro systems to be developed in
4460 parallel, and won't otherwise impact the evolution of the
4462 * The prelude has been [pared back significantly][prelude] such
4463 that it is the minimum necessary to support the most pervasive
4464 code patterns, and through [generalized where clauses][where]
4465 many of the prelude extension traits have been consolidated.
4466 * Rust's rudimentary reflection [has been removed][refl], as it
4467 incurred too much code generation for little benefit.
4468 * [Struct variants][structvars] are no longer feature-gated.
4469 * Trait bounds can be [polymorphic over lifetimes][hrtb]. Also
4470 known as 'higher-ranked trait bounds', this crucially allows
4471 unboxed closures to work.
4472 * Macros invocations surrounded by parens or square brackets and
4473 not terminated by a semicolon are [parsed as
4474 expressions][macros], which makes expressions like `vec![1i32,
4475 2, 3].len()` work as expected.
4476 * Trait objects now implement their traits automatically, and
4477 traits that can be coerced to objects now must be [object
4479 * Automatically deriving traits is now done with `#[derive(...)]`
4480 not `#[deriving(...)]` for [consistency with other naming
4481 conventions][derive].
4482 * Importing the containing module or enum at the same time as
4483 items or variants they contain is [now done with `self` instead
4484 of `mod`][self], as in use `foo::{self, bar}`
4485 * Glob imports are no longer feature-gated.
4486 * The `box` operator and `box` patterns have been feature-gated
4487 pending a redesign. For now unique boxes should be allocated
4488 like other containers, with `Box::new`.
4492 * A [series][coll1] of [efforts][coll2] to establish
4493 [conventions][coll3] for collections types has resulted in API
4494 improvements throughout the standard library.
4495 * New [APIs for error handling][err] provide ergonomic interop
4496 between error types, and [new conventions][err-conv] describe
4497 more clearly the recommended error handling strategies in Rust.
4498 * The `fail!` macro has been renamed to [`panic!`][panic] so that
4499 it is easier to discuss failure in the context of error handling
4500 without making clarifications as to whether you are referring to
4501 the 'fail' macro or failure more generally.
4502 * On Linux, `OsRng` prefers the new, more reliable `getrandom`
4503 syscall when available.
4504 * The 'serialize' crate has been renamed 'rustc-serialize' and
4505 moved out of the distribution to Cargo. Although it is widely
4506 used now, it is expected to be superseded in the near future.
4507 * The `Show` formatter, typically implemented with
4508 `#[derive(Show)]` is [now requested with the `{:?}`
4509 specifier][show] and is intended for use by all types, for uses
4510 such as `println!` debugging. The new `String` formatter must be
4511 implemented by hand, uses the `{}` specifier, and is intended
4512 for full-fidelity conversions of things that can logically be
4513 represented as strings.
4517 * [Flexible target specification][flex] allows rustc's code
4518 generation to be configured to support otherwise-unsupported
4520 * Rust comes with rust-gdb and rust-lldb scripts that launch their
4521 respective debuggers with Rust-appropriate pretty-printing.
4522 * The Windows installation of Rust is distributed with the
4523 MinGW components currently required to link binaries on that
4528 * Nullable enum optimizations have been extended to more types so
4529 that e.g. `Option<Vec<T>>` and `Option<String>` take up no more
4530 space than the inner types themselves.
4531 * Work has begun on supporting AArch64.
4533 [Cargo]: https://crates.io
4534 [unboxed]: http://smallcultfollowing.com/babysteps/blog/2014/11/26/purging-proc/
4535 [enum]: https://github.com/rust-lang/rfcs/blob/master/text/0390-enum-namespacing.md
4536 [flex]: https://github.com/rust-lang/rfcs/blob/master/text/0131-target-specification.md
4537 [err]: https://github.com/rust-lang/rfcs/blob/master/text/0201-error-chaining.md
4538 [err-conv]: https://github.com/rust-lang/rfcs/blob/master/text/0236-error-conventions.md
4539 [rt]: https://github.com/rust-lang/rfcs/blob/master/text/0230-remove-runtime.md
4540 [mac]: https://github.com/rust-lang/rfcs/blob/master/text/0453-macro-reform.md
4541 [mac-future]: https://github.com/rust-lang/rfcs/pull/550
4542 [DST]: http://smallcultfollowing.com/babysteps/blog/2014/01/05/dst-take-5/
4543 [coll1]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md
4544 [coll2]: https://github.com/rust-lang/rfcs/blob/master/text/0509-collections-reform-part-2.md
4545 [coll3]: https://github.com/rust-lang/rfcs/blob/master/text/0216-collection-views.md
4546 [ops]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md
4547 [prelude]: https://github.com/rust-lang/rfcs/blob/master/text/0503-prelude-stabilization.md
4548 [where]: https://github.com/rust-lang/rfcs/blob/master/text/0135-where.md
4549 [refl]: https://github.com/rust-lang/rfcs/blob/master/text/0379-remove-reflection.md
4550 [panic]: https://github.com/rust-lang/rfcs/blob/master/text/0221-panic.md
4551 [structvars]: https://github.com/rust-lang/rfcs/blob/master/text/0418-struct-variants.md
4552 [hrtb]: https://github.com/rust-lang/rfcs/blob/master/text/0387-higher-ranked-trait-bounds.md
4553 [unicode]: https://github.com/rust-lang/rfcs/blob/master/text/0446-es6-unicode-escapes.md
4554 [oibit]: https://github.com/rust-lang/rfcs/blob/master/text/0019-opt-in-builtin-traits.md
4555 [macros]: https://github.com/rust-lang/rfcs/blob/master/text/0378-expr-macros.md
4556 [range]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md#indexing-and-slicing
4557 [arrays]: https://github.com/rust-lang/rfcs/blob/master/text/0520-new-array-repeat-syntax.md
4558 [show]: https://github.com/rust-lang/rfcs/blob/master/text/0504-show-stabilization.md
4559 [derive]: https://github.com/rust-lang/rfcs/blob/master/text/0534-deriving2derive.md
4560 [self]: https://github.com/rust-lang/rfcs/blob/master/text/0532-self-in-use.md
4561 [fb]: https://github.com/rust-lang/rfcs/blob/master/text/0212-restore-int-fallback.md
4562 [objsafe]: https://github.com/rust-lang/rfcs/blob/master/text/0255-object-safety.md
4563 [assoc]: https://github.com/rust-lang/rfcs/blob/master/text/0195-associated-items.md
4564 [ints]: https://github.com/rust-lang/rfcs/pull/544#issuecomment-68760871
4565 [trpl]: https://doc.rust-lang.org/book/index.html
4566 [rbe]: http://rustbyexample.com/
4569 Version 0.12.0 (2014-10-09)
4570 =============================
4572 * ~1900 changes, numerous bugfixes
4576 * The introductory documentation (now called The Rust Guide) has
4577 been completely rewritten, as have a number of supplementary
4579 * Rust's package manager, Cargo, continues to improve and is
4580 sometimes considered to be quite awesome.
4581 * Many API's in `std` have been reviewed and updated for
4582 consistency with the in-development Rust coding
4583 guidelines. The standard library documentation tracks
4584 stabilization progress.
4585 * Minor libraries have been moved out-of-tree to the rust-lang org
4586 on GitHub: uuid, semver, glob, num, hexfloat, fourcc. They can
4587 be installed with Cargo.
4588 * Lifetime elision allows lifetime annotations to be left off of
4589 function declarations in many common scenarios.
4590 * Rust now works on 64-bit Windows.
4593 * Indexing can be overloaded with the `Index` and `IndexMut`
4595 * The `if let` construct takes a branch only if the `let` pattern
4596 matches, currently behind the 'if_let' feature gate.
4597 * 'where clauses', a more flexible syntax for specifying trait
4598 bounds that is more aesthetic, have been added for traits and
4599 free functions. Where clauses will in the future make it
4600 possible to constrain associated types, which would be
4601 impossible with the existing syntax.
4602 * A new slicing syntax (e.g. `[0..4]`) has been introduced behind
4603 the 'slicing_syntax' feature gate, and can be overloaded with
4604 the `Slice` or `SliceMut` traits.
4605 * The syntax for matching of sub-slices has been changed to use a
4606 postfix `..` instead of prefix (.e.g. `[a, b, c..]`), for
4607 consistency with other uses of `..` and to future-proof
4608 potential additional uses of the syntax.
4609 * The syntax for matching inclusive ranges in patterns has changed
4610 from `0..3` to `0...4` to be consistent with the exclusive range
4612 * Matching of sub-slices in non-tail positions (e.g. `[a.., b,
4613 c]`) has been put behind the 'advanced_slice_patterns' feature
4614 gate and may be removed in the future.
4615 * Components of tuples and tuple structs can be extracted using
4616 the `value.0` syntax, currently behind the `tuple_indexing`
4618 * The `#[crate_id]` attribute is no longer supported; versioning
4619 is handled by the package manager.
4620 * Renaming crate imports are now written `extern crate foo as bar`
4621 instead of `extern crate bar = foo`.
4622 * Renaming use statements are now written `use foo as bar` instead
4624 * `let` and `match` bindings and argument names in macros are now
4626 * The new, more efficient, closure types ('unboxed closures') have
4627 been added under a feature gate, 'unboxed_closures'. These will
4628 soon replace the existing closure types, once higher-ranked
4629 trait lifetimes are added to the language.
4630 * `move` has been added as a keyword, for indicating closures
4631 that capture by value.
4632 * Mutation and assignment is no longer allowed in pattern guards.
4633 * Generic structs and enums can now have trait bounds.
4634 * The `Share` trait is now called `Sync` to free up the term
4635 'shared' to refer to 'shared reference' (the default reference
4637 * Dynamically-sized types have been mostly implemented,
4638 unifying the behavior of fat-pointer types with the rest of the
4640 * As part of dynamically-sized types, the `Sized` trait has been
4641 introduced, which qualifying types implement by default, and
4642 which type parameters expect by default. To specify that a type
4643 parameter does not need to be sized, write `<Sized? T>`. Most
4644 types are `Sized`, notable exceptions being unsized arrays
4645 (`[T]`) and trait types.
4646 * Closures can return `!`, as in `|| -> !` or `proc() -> !`.
4647 * Lifetime bounds can now be applied to type parameters and object
4649 * The old, reference counted GC type, `Gc<T>` which was once
4650 denoted by the `@` sigil, has finally been removed. GC will be
4651 revisited in the future.
4654 * Library documentation has been improved for a number of modules.
4655 * Bit-vectors, collections::bitv has been modernized.
4656 * The url crate is deprecated in favor of
4657 http://github.com/servo/rust-url, which can be installed with
4659 * Most I/O stream types can be cloned and subsequently closed from
4661 * A `std::time::Duration` type has been added for use in I/O
4662 methods that rely on timers, as well as in the 'time' crate's
4663 `Timespec` arithmetic.
4664 * The runtime I/O abstraction layer that enabled the green thread
4665 scheduler to do non-thread-blocking I/O has been removed, along
4666 with the libuv-based implementation employed by the green thread
4667 scheduler. This will greatly simplify the future I/O work.
4668 * `collections::btree` has been rewritten to have a more
4669 idiomatic and efficient design.
4672 * rustdoc output now indicates the stability levels of API's.
4673 * The `--crate-name` flag can specify the name of the crate
4674 being compiled, like `#[crate_name]`.
4675 * The `-C metadata` specifies additional metadata to hash into
4676 symbol names, and `-C extra-filename` specifies additional
4677 information to put into the output filename, for use by the
4678 package manager for versioning.
4679 * debug info generation has continued to improve and should be
4680 more reliable under both gdb and lldb.
4681 * rustc has experimental support for compiling in parallel
4682 using the `-C codegen-units` flag.
4683 * rustc no longer encodes rpath information into binaries by
4687 * Stack usage has been optimized with LLVM lifetime annotations.
4688 * Official Rust binaries on Linux are more compatible with older
4689 kernels and distributions, built on CentOS 5.10.
4692 Version 0.11.0 (2014-07-02)
4693 ==========================
4695 * ~1700 changes, numerous bugfixes
4698 * ~[T] has been removed from the language. This type is superseded by
4700 * ~str has been removed from the language. This type is superseded by
4702 * ~T has been removed from the language. This type is superseded by the
4704 * @T has been removed from the language. This type is superseded by the
4705 standard library's std::gc::Gc<T> type.
4706 * Struct fields are now all private by default.
4707 * Vector indices and shift amounts are both required to be a `uint`
4708 instead of any integral type.
4709 * Byte character, byte string, and raw byte string literals are now all
4710 supported by prefixing the normal literal with a `b`.
4711 * Multiple ABIs are no longer allowed in an ABI string
4712 * The syntax for lifetimes on closures/procedures has been tweaked
4713 slightly: `<'a>|A, B|: 'b + K -> T`
4714 * Floating point modulus has been removed from the language; however it
4715 is still provided by a library implementation.
4716 * Private enum variants are now disallowed.
4717 * The `priv` keyword has been removed from the language.
4718 * A closure can no longer be invoked through a &-pointer.
4719 * The `use foo, bar, baz;` syntax has been removed from the language.
4720 * The transmute intrinsic no longer works on type parameters.
4721 * Statics now allow blocks/items in their definition.
4722 * Trait bounds are separated from objects with + instead of : now.
4723 * Objects can no longer be read while they are mutably borrowed.
4724 * The address of a static is now marked as insignificant unless the
4725 #[inline(never)] attribute is placed it.
4726 * The #[unsafe_destructor] attribute is now behind a feature gate.
4727 * Struct literals are no longer allowed in ambiguous positions such as
4728 if, while, match, and for..in.
4729 * Declaration of lang items and intrinsics are now feature-gated by
4731 * Integral literals no longer default to `int`, and floating point
4732 literals no longer default to `f64`. Literals must be suffixed with an
4733 appropriate type if inference cannot determine the type of the
4735 * The Box<T> type is no longer implicitly borrowed to &mut T.
4736 * Procedures are now required to not capture borrowed references.
4739 * The standard library is now a "facade" over a number of underlying
4740 libraries. This means that development on the standard library should
4741 be speedier due to smaller crates, as well as a clearer line between
4743 * A new library, libcore, lives under the standard library's facade
4744 which is Rust's "0-assumption" library, suitable for embedded and
4745 kernel development for example.
4746 * A regex crate has been added to the standard distribution. This crate
4747 includes statically compiled regular expressions.
4748 * The unwrap/unwrap_err methods on Result require a Show bound for
4749 better error messages.
4750 * The return types of the std::comm primitives have been centralized
4751 around the Result type.
4752 * A number of I/O primitives have gained the ability to time out their
4754 * A number of I/O primitives have gained the ability to close their
4755 reading/writing halves to cancel pending operations.
4756 * Reverse iterator methods have been removed in favor of `rev()` on
4757 their forward-iteration counterparts.
4758 * A bitflags! macro has been added to enable easy interop with C and
4759 management of bit flags.
4760 * A debug_assert! macro is now provided which is disabled when
4761 `--cfg ndebug` is passed to the compiler.
4762 * A graphviz crate has been added for creating .dot files.
4763 * The std::cast module has been migrated into std::mem.
4764 * The std::local_data api has been migrated from freestanding functions
4765 to being based on methods.
4766 * The Pod trait has been renamed to Copy.
4767 * jemalloc has been added as the default allocator for types.
4768 * The API for allocating memory has been changed to use proper alignment
4769 and sized deallocation
4770 * Connecting a TcpStream or binding a TcpListener is now based on a
4771 string address and a u16 port. This allows connecting to a hostname as
4773 * The Reader trait now contains a core method, read_at_least(), which
4774 correctly handles many repeated 0-length reads.
4775 * The process-spawning API is now centered around a builder-style
4777 * The :? printing qualifier has been moved from the standard library to
4778 an external libdebug crate.
4779 * Eq/Ord have been renamed to PartialEq/PartialOrd. TotalEq/TotalOrd
4780 have been renamed to Eq/Ord.
4781 * The select/plural methods have been removed from format!. The escapes
4782 for { and } have also changed from \{ and \} to {{ and }},
4784 * The TaskBuilder API has been re-worked to be a true builder, and
4785 extension traits for spawning native/green tasks have been added.
4788 * All breaking changes to the language or libraries now have their
4789 commit message annotated with `[breaking-change]` to allow for easy
4790 discovery of breaking changes.
4791 * The compiler will now try to suggest how to annotate lifetimes if a
4792 lifetime-related error occurs.
4793 * Debug info continues to be improved greatly with general bug fixes and
4794 better support for situations like link time optimization (LTO).
4795 * Usage of syntax extensions when cross-compiling has been fixed.
4796 * Functionality equivalent to GCC & Clang's -ffunction-sections,
4797 -fdata-sections and --gc-sections has been enabled by default
4798 * The compiler is now stricter about where it will load module files
4799 from when a module is declared via `mod foo;`.
4800 * The #[phase(syntax)] attribute has been renamed to #[phase(plugin)].
4801 Syntax extensions are now discovered via a "plugin registrar" type
4802 which will be extended in the future to other various plugins.
4803 * Lints have been restructured to allow for dynamically loadable lints.
4804 * A number of rustdoc improvements:
4805 * The HTML output has been visually redesigned.
4806 * Markdown is now powered by hoedown instead of sundown.
4807 * Searching heuristics have been greatly improved.
4808 * The search index has been reduced in size by a great amount.
4809 * Cross-crate documentation via `pub use` has been greatly improved.
4810 * Primitive types are now hyperlinked and documented.
4811 * Documentation has been moved from static.rust-lang.org/doc to
4813 * A new sandbox, play.rust-lang.org, is available for running and
4814 sharing rust code examples on-line.
4815 * Unused attributes are now more robustly warned about.
4816 * The dead_code lint now warns about unused struct fields.
4817 * Cross-compiling to iOS is now supported.
4818 * Cross-compiling to mipsel is now supported.
4819 * Stability attributes are now inherited by default and no longer apply
4820 to intra-crate usage, only inter-crate usage.
4821 * Error message related to non-exhaustive match expressions have been
4825 Version 0.10 (2014-04-03)
4826 =========================
4828 * ~1500 changes, numerous bugfixes
4831 * A new RFC process is now in place for modifying the language.
4832 * Patterns with `@`-pointers have been removed from the language.
4833 * Patterns with unique vectors (`~[T]`) have been removed from the
4835 * Patterns with unique strings (`~str`) have been removed from the
4837 * `@str` has been removed from the language.
4838 * `@[T]` has been removed from the language.
4839 * `@self` has been removed from the language.
4840 * `@Trait` has been removed from the language.
4841 * Headers on `~` allocations which contain `@` boxes inside the type for
4842 reference counting have been removed.
4843 * The semantics around the lifetimes of temporary expressions have changed,
4844 see #3511 and #11585 for more information.
4845 * Cross-crate syntax extensions are now possible, but feature gated. See
4846 #11151 for more information. This includes both `macro_rules!` macros as
4847 well as syntax extensions such as `format!`.
4848 * New lint modes have been added, and older ones have been turned on to be
4850 * Unnecessary parentheses
4853 * Uppercase variables
4854 * Publicly visible private types
4855 * `#[deriving]` with raw pointers
4856 * Unsafe functions can no longer be coerced to closures.
4857 * Various obscure macros such as `log_syntax!` are now behind feature gates.
4858 * The `#[simd]` attribute is now behind a feature gate.
4859 * Visibility is no longer allowed on `extern crate` statements, and
4860 unnecessary visibility (`priv`) is no longer allowed on `use` statements.
4861 * Trailing commas are now allowed in argument lists and tuple patterns.
4862 * The `do` keyword has been removed, it is now a reserved keyword.
4863 * Default type parameters have been implemented, but are feature gated.
4864 * Borrowed variables through captures in closures are now considered soundly.
4865 * `extern mod` is now `extern crate`
4866 * The `Freeze` trait has been removed.
4867 * The `Share` trait has been added for types that can be shared among
4869 * Labels in macros are now hygienic.
4870 * Expression/statement macro invocations can be delimited with `{}` now.
4871 * Treatment of types allowed in `static mut` locations has been tweaked.
4872 * The `*` and `.` operators are now overloadable through the `Deref` and
4874 * `~Trait` and `proc` no longer have `Send` bounds by default.
4875 * Partial type hints are now supported with the `_` type marker.
4876 * An `Unsafe` type was introduced for interior mutability. It is now
4877 considered undefined to transmute from `&T` to `&mut T` without using the
4879 * The #[linkage] attribute was implemented for extern statics/functions.
4880 * The inner attribute syntax has changed from `#[foo];` to `#![foo]`.
4881 * `Pod` was renamed to `Copy`.
4884 * The `libextra` library has been removed. It has now been decomposed into
4885 component libraries with smaller and more focused nuggets of
4886 functionality. The full list of libraries can be found on the
4887 documentation index page.
4888 * std: `std::condition` has been removed. All I/O errors are now propagated
4889 through the `Result` type. In order to assist with error handling, a
4890 `try!` macro for unwrapping errors with an early return and a lint for
4891 unused results has been added. See #12039 for more information.
4892 * std: The `vec` module has been renamed to `slice`.
4893 * std: A new vector type, `Vec<T>`, has been added in preparation for DST.
4894 This will become the only growable vector in the future.
4895 * std: `std::io` now has more public-reexports. Types such as `BufferedReader`
4896 are now found at `std::io::BufferedReader` instead of
4897 `std::io::buffered::BufferedReader`.
4898 * std: `print` and `println` are no longer in the prelude, the `print!` and
4899 `println!` macros are intended to be used instead.
4900 * std: `Rc` now has a `Weak` pointer for breaking cycles, and it no longer
4901 attempts to statically prevent cycles.
4902 * std: The standard distribution is adopting the policy of pushing failure
4903 to the user rather than failing in libraries. Many functions (such as
4904 `slice::last()`) now return `Option<T>` instead of `T` + failing.
4905 * std: `fmt::Default` has been renamed to `fmt::Show`, and it now has a new
4906 deriving mode: `#[deriving(Show)]`.
4907 * std: `ToStr` is now implemented for all types implementing `Show`.
4908 * std: The formatting trait methods now take `&self` instead of `&T`
4909 * std: The `invert()` method on iterators has been renamed to `rev()`
4910 * std: `std::num` has seen a reduction in the genericity of its traits,
4911 consolidating functionality into a few core traits.
4912 * std: Backtraces are now printed on task failure if the environment
4913 variable `RUST_BACKTRACE` is present.
4914 * std: Naming conventions for iterators have been standardized. More details
4915 can be found on the wiki's style guide.
4916 * std: `eof()` has been removed from the `Reader` trait. Specific types may
4917 still implement the function.
4918 * std: Networking types are now cloneable to allow simultaneous reads/writes.
4919 * std: `assert_approx_eq!` has been removed
4920 * std: The `e` and `E` formatting specifiers for floats have been added to
4921 print them in exponential notation.
4922 * std: The `Times` trait has been removed
4923 * std: Indications of variance and opting out of builtin bounds is done
4924 through marker types in `std::kinds::marker` now
4925 * std: `hash` has been rewritten, `IterBytes` has been removed, and
4926 `#[deriving(Hash)]` is now possible.
4927 * std: `SharedChan` has been removed, `Sender` is now cloneable.
4928 * std: `Chan` and `Port` were renamed to `Sender` and `Receiver`.
4929 * std: `Chan::new` is now `channel()`.
4930 * std: A new synchronous channel type has been implemented.
4931 * std: A `select!` macro is now provided for selecting over `Receiver`s.
4932 * std: `hashmap` and `trie` have been moved to `libcollections`
4933 * std: `run` has been rolled into `io::process`
4934 * std: `assert_eq!` now uses `{}` instead of `{:?}`
4935 * std: The equality and comparison traits have seen some reorganization.
4936 * std: `rand` has moved to `librand`.
4937 * std: `to_{lower,upper}case` has been implemented for `char`.
4938 * std: Logging has been moved to `liblog`.
4939 * collections: `HashMap` has been rewritten for higher performance and less
4941 * native: The default runtime is now `libnative`. If `libgreen` is desired,
4942 it can be booted manually. The runtime guide has more information and
4944 * native: All I/O functionality except signals has been implemented.
4945 * green: Task spawning with `libgreen` has been optimized with stack caching
4946 and various trimming of code.
4947 * green: Tasks spawned by `libgreen` now have an unmapped guard page.
4948 * sync: The `extra::sync` module has been updated to modern rust (and moved
4949 to the `sync` library), tweaking and improving various interfaces while
4950 dropping redundant functionality.
4951 * sync: A new `Barrier` type has been added to the `sync` library.
4952 * sync: An efficient mutex for native and green tasks has been implemented.
4953 * serialize: The `base64` module has seen some improvement. It treats
4954 newlines better, has non-string error values, and has seen general
4956 * fourcc: A `fourcc!` macro was introduced
4957 * hexfloat: A `hexfloat!` macro was implemented for specifying floats via a
4958 hexadecimal literal.
4961 * `rustpkg` has been deprecated and removed from the main repository. Its
4962 replacement, `cargo`, is under development.
4963 * Nightly builds of rust are now available
4964 * The memory usage of rustc has been improved many times throughout this
4966 * The build process supports disabling rpath support for the rustc binary
4968 * Code generation has improved in some cases, giving more information to the
4969 LLVM optimization passes to enable more extensive optimizations.
4970 * Debuginfo compatibility with lldb on OSX has been restored.
4971 * The master branch is now gated on an android bot, making building for
4972 android much more reliable.
4973 * Output flags have been centralized into one `--emit` flag.
4974 * Crate type flags have been centralized into one `--crate-type` flag.
4975 * Codegen flags have been consolidated behind a `-C` flag.
4976 * Linking against outdated crates now has improved error messages.
4977 * Error messages with lifetimes will often suggest how to annotate the
4978 function to fix the error.
4979 * Many more types are documented in the standard library, and new guides
4981 * Many `rustdoc` improvements:
4982 * code blocks are syntax highlighted.
4983 * render standalone markdown files.
4984 * the --test flag tests all code blocks by default.
4985 * exported macros are displayed.
4986 * reexported types have their documentation inlined at the location of the
4988 * search works across crates that have been rendered to the same output
4992 Version 0.9 (2014-01-09)
4993 ==========================
4995 * ~1800 changes, numerous bugfixes
4998 * The `float` type has been removed. Use `f32` or `f64` instead.
4999 * A new facility for enabling experimental features (feature gating) has
5000 been added, using the crate-level `#[feature(foo)]` attribute.
5001 * Managed boxes (@) are now behind a feature gate
5002 (`#[feature(managed_boxes)]`) in preparation for future removal. Use the
5003 standard library's `Gc` or `Rc` types instead.
5004 * `@mut` has been removed. Use `std::cell::{Cell, RefCell}` instead.
5005 * Jumping back to the top of a loop is now done with `continue` instead of
5007 * Strings can no longer be mutated through index assignment.
5008 * Raw strings can be created via the basic `r"foo"` syntax or with matched
5009 hash delimiters, as in `r###"foo"###`.
5010 * `~fn` is now written `proc (args) -> retval { ... }` and may only be
5012 * The `&fn` type is now written `|args| -> ret` to match the literal form.
5013 * `@fn`s have been removed.
5014 * `do` only works with procs in order to make it obvious what the cost
5016 * Single-element tuple-like structs can no longer be dereferenced to
5017 obtain the inner value. A more comprehensive solution for overloading
5018 the dereference operator will be provided in the future.
5019 * The `#[link(...)]` attribute has been replaced with
5020 `#[crate_id = "name#vers"]`.
5021 * Empty `impl`s must be terminated with empty braces and may not be
5022 terminated with a semicolon.
5023 * Keywords are no longer allowed as lifetime names; the `self` lifetime
5024 no longer has any special meaning.
5025 * The old `fmt!` string formatting macro has been removed.
5026 * `printf!` and `printfln!` (old-style formatting) removed in favor of
5027 `print!` and `println!`.
5028 * `mut` works in patterns now, as in `let (mut x, y) = (1, 2);`.
5029 * The `extern mod foo (name = "bar")` syntax has been removed. Use
5030 `extern mod foo = "bar"` instead.
5031 * New reserved keywords: `alignof`, `offsetof`, `sizeof`.
5032 * Macros can have attributes.
5033 * Macros can expand to items with attributes.
5034 * Macros can expand to multiple items.
5035 * The `asm!` macro is feature-gated (`#[feature(asm)]`).
5036 * Comments may be nested.
5037 * Values automatically coerce to trait objects they implement, without
5039 * Enum discriminants are no longer an entire word but as small as needed to
5040 contain all the variants. The `repr` attribute can be used to override
5041 the discriminant size, as in `#[repr(int)]` for integer-sized, and
5042 `#[repr(C)]` to match C enums.
5043 * Non-string literals are not allowed in attributes (they never worked).
5044 * The FFI now supports variadic functions.
5045 * Octal numeric literals, as in `0o7777`.
5046 * The `concat!` syntax extension performs compile-time string concatenation.
5047 * The `#[fixed_stack_segment]` and `#[rust_stack]` attributes have been
5048 removed as Rust no longer uses segmented stacks.
5049 * Non-ascii identifiers are feature-gated (`#[feature(non_ascii_idents)]`).
5050 * Ignoring all fields of an enum variant or tuple-struct is done with `..`,
5051 not `*`; ignoring remaining fields of a struct is also done with `..`,
5052 not `_`; ignoring a slice of a vector is done with `..`, not `.._`.
5053 * `rustc` supports the "win64" calling convention via `extern "win64"`.
5054 * `rustc` supports the "system" calling convention, which defaults to the
5055 preferred convention for the target platform, "stdcall" on 32-bit Windows,
5057 * The `type_overflow` lint (default: warn) checks literals for overflow.
5058 * The `unsafe_block` lint (default: allow) checks for usage of `unsafe`.
5059 * The `attribute_usage` lint (default: warn) warns about unknown
5061 * The `unknown_features` lint (default: warn) warns about unknown
5063 * The `dead_code` lint (default: warn) checks for dead code.
5064 * Rust libraries can be linked statically to one another
5065 * `#[link_args]` is behind the `link_args` feature gate.
5066 * Native libraries are now linked with `#[link(name = "foo")]`
5067 * Native libraries can be statically linked to a rust crate
5068 (`#[link(name = "foo", kind = "static")]`).
5069 * Native OS X frameworks are now officially supported
5070 (`#[link(name = "foo", kind = "framework")]`).
5071 * The `#[thread_local]` attribute creates thread-local (not task-local)
5072 variables. Currently behind the `thread_local` feature gate.
5073 * The `return` keyword may be used in closures.
5074 * Types that can be copied via a memcpy implement the `Pod` kind.
5075 * The `cfg` attribute can now be used on struct fields and enum variants.
5078 * std: The `option` and `result` API's have been overhauled to make them
5079 simpler, more consistent, and more composable.
5080 * std: The entire `std::io` module has been replaced with one that is
5081 more comprehensive and that properly interfaces with the underlying
5082 scheduler. File, TCP, UDP, Unix sockets, pipes, and timers are all
5084 * std: `io::util` contains a number of useful implementations of
5085 `Reader` and `Writer`, including `NullReader`, `NullWriter`,
5086 `ZeroReader`, `TeeReader`.
5087 * std: The reference counted pointer type `extra::rc` moved into std.
5088 * std: The `Gc` type in the `gc` module will replace `@` (it is currently
5089 just a wrapper around it).
5090 * std: The `Either` type has been removed.
5091 * std: `fmt::Default` can be implemented for any type to provide default
5092 formatting to the `format!` macro, as in `format!("{}", myfoo)`.
5093 * std: The `rand` API continues to be tweaked.
5094 * std: The `rust_begin_unwind` function, useful for inserting breakpoints
5095 on failure in gdb, is now named `rust_fail`.
5096 * std: The `each_key` and `each_value` methods on `HashMap` have been
5097 replaced by the `keys` and `values` iterators.
5098 * std: Functions dealing with type size and alignment have moved from the
5099 `sys` module to the `mem` module.
5100 * std: The `path` module was written and API changed.
5101 * std: `str::from_utf8` has been changed to cast instead of allocate.
5102 * std: `starts_with` and `ends_with` methods added to vectors via the
5103 `ImmutableEqVector` trait, which is in the prelude.
5104 * std: Vectors can be indexed with the `get_opt` method, which returns `None`
5105 if the index is out of bounds.
5106 * std: Task failure no longer propagates between tasks, as the model was
5107 complex, expensive, and incompatible with thread-based tasks.
5108 * std: The `Any` type can be used for dynamic typing.
5109 * std: `~Any` can be passed to the `fail!` macro and retrieved via
5111 * std: Methods that produce iterators generally do not have an `_iter`
5113 * std: `cell::Cell` and `cell::RefCell` can be used to introduce mutability
5114 roots (mutable fields, etc.). Use instead of e.g. `@mut`.
5115 * std: `util::ignore` renamed to `prelude::drop`.
5116 * std: Slices have `sort` and `sort_by` methods via the `MutableVector`
5118 * std: `vec::raw` has seen a lot of cleanup and API changes.
5119 * std: The standard library no longer includes any C++ code, and very
5120 minimal C, eliminating the dependency on libstdc++.
5121 * std: Runtime scheduling and I/O functionality has been factored out into
5122 extensible interfaces and is now implemented by two different crates:
5123 libnative, for native threading and I/O; and libgreen, for green threading
5124 and I/O. This paves the way for using the standard library in more limited
5125 embedded environments.
5126 * std: The `comm` module has been rewritten to be much faster, have a
5127 simpler, more consistent API, and to work for both native and green
5129 * std: All libuv dependencies have been moved into the rustuv crate.
5130 * native: New implementations of runtime scheduling on top of OS threads.
5131 * native: New native implementations of TCP, UDP, file I/O, process spawning,
5133 * green: The green thread scheduler and message passing types are almost
5135 * extra: The `flatpipes` module had bitrotted and was removed.
5136 * extra: All crypto functions have been removed and Rust now has a policy of
5137 not reimplementing crypto in the standard library. In the future crypto
5138 will be provided by external crates with bindings to established libraries.
5139 * extra: `c_vec` has been modernized.
5140 * extra: The `sort` module has been removed. Use the `sort` method on
5144 * The `rust` and `rusti` commands have been removed, due to lack of
5146 * `rustdoc` was completely rewritten.
5147 * `rustdoc` can test code examples in documentation.
5148 * `rustpkg` can test packages with the argument, 'test'.
5149 * `rustpkg` supports arbitrary dependencies, including C libraries.
5150 * `rustc`'s support for generating debug info is improved again.
5151 * `rustc` has better error reporting for unbalanced delimiters.
5152 * `rustc`'s JIT support was removed due to bitrot.
5153 * Executables and static libraries can be built with LTO (-Z lto)
5154 * `rustc` adds a `--dep-info` flag for communicating dependencies to
5158 Version 0.8 (2013-09-26)
5159 ============================
5161 * ~2200 changes, numerous bugfixes
5164 * The `for` loop syntax has changed to work with the `Iterator` trait.
5165 * At long last, unwinding works on Windows.
5166 * Default methods are ready for use.
5167 * Many trait inheritance bugs fixed.
5168 * Owned and borrowed trait objects work more reliably.
5169 * `copy` is no longer a keyword. It has been replaced by the `Clone` trait.
5170 * rustc can omit emission of code for the `debug!` macro if it is passed
5172 * mod.rs is now "blessed". When loading `mod foo;`, rustc will now look
5173 for foo.rs, then foo/mod.rs, and will generate an error when both are
5175 * Strings no longer contain trailing nulls. The new `std::c_str` module
5176 provides new mechanisms for converting to C strings.
5177 * The type of foreign functions is now `extern "C" fn` instead of `*u8'.
5178 * The FFI has been overhauled such that foreign functions are called directly,
5179 instead of through a stack-switching wrapper.
5180 * Calling a foreign function must be done through a Rust function with the
5181 `#[fixed_stack_segment]` attribute.
5182 * The `externfn!` macro can be used to declare both a foreign function and
5183 a `#[fixed_stack_segment]` wrapper at once.
5184 * `pub` and `priv` modifiers on `extern` blocks are no longer parsed.
5185 * `unsafe` is no longer allowed on extern fns - they are all unsafe.
5186 * `priv` is disallowed everywhere except for struct fields and enum variants.
5187 * `&T` (besides `&'static T`) is no longer allowed in `@T`.
5188 * `ref` bindings in irrefutable patterns work correctly now.
5189 * `char` is now prevented from containing invalid code points.
5190 * Casting to `bool` is no longer allowed.
5191 * `\0` is now accepted as an escape in chars and strings.
5192 * `yield` is a reserved keyword.
5193 * `typeof` is a reserved keyword.
5194 * Crates may be imported by URL with `extern mod foo = "url";`.
5195 * Explicit enum discriminants may be given as uints as in `enum E { V = 0u }`
5196 * Static vectors can be initialized with repeating elements,
5197 e.g. `static foo: [u8, .. 100]: [0, .. 100];`.
5198 * Static structs can be initialized with functional record update,
5199 e.g. `static foo: Foo = Foo { a: 5, .. bar };`.
5200 * `cfg!` can be used to conditionally execute code based on the crate
5201 configuration, similarly to `#[cfg(...)]`.
5202 * The `unnecessary_qualification` lint detects unneeded module
5203 prefixes (default: allow).
5204 * Arithmetic operations have been implemented on the SIMD types in
5205 `std::unstable::simd`.
5206 * Exchange allocation headers were removed, reducing memory usage.
5207 * `format!` implements a completely new, extensible, and higher-performance
5208 string formatting system. It will replace `fmt!`.
5209 * `print!` and `println!` write formatted strings (using the `format!`
5210 extension) to stdout.
5211 * `write!` and `writeln!` write formatted strings (using the `format!`
5212 extension) to the new Writers in `std::rt::io`.
5213 * The library section in which a function or static is placed may
5214 be specified with `#[link_section = "..."]`.
5215 * The `proto!` syntax extension for defining bounded message protocols
5217 * `macro_rules!` is hygienic for `let` declarations.
5218 * The `#[export_name]` attribute specifies the name of a symbol.
5219 * `unreachable!` can be used to indicate unreachable code, and fails
5223 * std: Transitioned to the new runtime, written in Rust.
5224 * std: Added an experimental I/O library, `rt::io`, based on the new
5226 * std: A new generic `range` function was added to the prelude, replacing
5227 `uint::range` and friends.
5228 * std: `range_rev` no longer exists. Since range is an iterator it can be
5229 reversed with `range(lo, hi).invert()`.
5230 * std: The `chain` method on option renamed to `and_then`; `unwrap_or_default`
5231 renamed to `unwrap_or`.
5232 * std: The `iterator` module was renamed to `iter`.
5233 * std: Integral types now support the `checked_add`, `checked_sub`, and
5234 `checked_mul` operations for detecting overflow.
5235 * std: Many methods in `str`, `vec`, `option, `result` were renamed for
5237 * std: Methods are standardizing on conventions for casting methods:
5238 `to_foo` for copying, `into_foo` for moving, `as_foo` for temporary
5240 * std: The `CString` type in `c_str` provides new ways to convert to and
5242 * std: `DoubleEndedIterator` can yield elements in two directions.
5243 * std: The `mut_split` method on vectors partitions an `&mut [T]` into
5245 * std: `str::from_bytes` renamed to `str::from_utf8`.
5246 * std: `pop_opt` and `shift_opt` methods added to vectors.
5247 * std: The task-local data interface no longer uses @, and keys are
5248 no longer function pointers.
5249 * std: The `swap_unwrap` method of `Option` renamed to `take_unwrap`.
5250 * std: Added `SharedPort` to `comm`.
5251 * std: `Eq` has a default method for `ne`; only `eq` is required
5253 * std: `Ord` has default methods for `le`, `gt` and `ge`; only `lt`
5254 is required in implementations.
5255 * std: `is_utf8` performance is improved, impacting many string functions.
5256 * std: `os::MemoryMap` provides cross-platform mmap.
5257 * std: `ptr::offset` is now unsafe, but also more optimized. Offsets that
5258 are not 'in-bounds' are considered undefined.
5259 * std: Many freestanding functions in `vec` removed in favor of methods.
5260 * std: Many freestanding functions on scalar types removed in favor of
5262 * std: Many options to task builders were removed since they don't make
5263 sense in the new scheduler design.
5264 * std: More containers implement `FromIterator` so can be created by the
5266 * std: More complete atomic types in `unstable::atomics`.
5267 * std: `comm::PortSet` removed.
5268 * std: Mutating methods in the `Set` and `Map` traits have been moved into
5269 the `MutableSet` and `MutableMap` traits. `Container::is_empty`,
5270 `Map::contains_key`, `MutableMap::insert`, and `MutableMap::remove` have
5271 default implementations.
5272 * std: Various `from_str` functions were removed in favor of a generic
5273 `from_str` which is available in the prelude.
5274 * std: `util::unreachable` removed in favor of the `unreachable!` macro.
5275 * extra: `dlist`, the doubly-linked list was modernized.
5276 * extra: Added a `hex` module with `ToHex` and `FromHex` traits.
5277 * extra: Added `glob` module, replacing `std::os::glob`.
5278 * extra: `rope` was removed.
5279 * extra: `deque` was renamed to `ringbuf`. `RingBuf` implements `Deque`.
5280 * extra: `net`, and `timer` were removed. The experimental replacements
5281 are `std::rt::io::net` and `std::rt::io::timer`.
5282 * extra: Iterators implemented for `SmallIntMap`.
5283 * extra: Iterators implemented for `Bitv` and `BitvSet`.
5284 * extra: `SmallIntSet` removed. Use `BitvSet`.
5285 * extra: Performance of JSON parsing greatly improved.
5286 * extra: `semver` updated to SemVer 2.0.0.
5287 * extra: `term` handles more terminals correctly.
5288 * extra: `dbg` module removed.
5289 * extra: `par` module removed.
5290 * extra: `future` was cleaned up, with some method renames.
5291 * extra: Most free functions in `getopts` were converted to methods.
5294 * rustc's debug info generation (`-Z debug-info`) is greatly improved.
5295 * rustc accepts `--target-cpu` to compile to a specific CPU architecture,
5296 similarly to gcc's `--march` flag.
5297 * rustc's performance compiling small crates is much better.
5298 * rustpkg has received many improvements.
5299 * rustpkg supports git tags as package IDs.
5300 * rustpkg builds into target-specific directories so it can be used for
5302 * The number of concurrent test tasks is controlled by the environment
5303 variable RUST_TEST_TASKS.
5304 * The test harness can now report metrics for benchmarks.
5305 * All tools have man pages.
5306 * Programs compiled with `--test` now support the `-h` and `--help` flags.
5307 * The runtime uses jemalloc for allocations.
5308 * Segmented stacks are temporarily disabled as part of the transition to
5309 the new runtime. Stack overflows are possible!
5310 * A new documentation backend, rustdoc_ng, is available for use. It is
5311 still invoked through the normal `rustdoc` command.
5314 Version 0.7 (2013-07-03)
5315 =======================
5317 * ~2000 changes, numerous bugfixes
5320 * `impl`s no longer accept a visibility qualifier. Put them on methods
5322 * The borrow checker has been rewritten with flow-sensitivity, fixing
5323 many bugs and inconveniences.
5324 * The `self` parameter no longer implicitly means `&'self self`,
5325 and can be explicitly marked with a lifetime.
5326 * Overloadable compound operators (`+=`, etc.) have been temporarily
5327 removed due to bugs.
5328 * The `for` loop protocol now requires `for`-iterators to return `bool`
5329 so they compose better.
5330 * The `Durable` trait is replaced with the `'static` bounds.
5331 * Trait default methods work more often.
5332 * Structs with the `#[packed]` attribute have byte alignment and
5333 no padding between fields.
5334 * Type parameters bound by `Copy` must now be copied explicitly with
5336 * It is now illegal to move out of a dereferenced unsafe pointer.
5337 * `Option<~T>` is now represented as a nullable pointer.
5338 * `@mut` does dynamic borrow checks correctly.
5339 * The `main` function is only detected at the topmost level of the crate.
5340 The `#[main]` attribute is still valid anywhere.
5341 * Struct fields may no longer be mutable. Use inherited mutability.
5342 * The `#[no_send]` attribute makes a type that would otherwise be
5344 * The `#[no_freeze]` attribute makes a type that would otherwise be
5346 * Unbounded recursion will abort the process after reaching the limit
5347 specified by the `RUST_MAX_STACK` environment variable (default: 1GB).
5348 * The `vecs_implicitly_copyable` lint mode has been removed. Vectors
5349 are never implicitly copyable.
5350 * `#[static_assert]` makes compile-time assertions about static bools.
5351 * At long last, 'argument modes' no longer exist.
5352 * The rarely used `use mod` statement no longer exists.
5355 * `fail!` and `assert!` accept `~str`, `&'static str` or `fmt!`-style
5357 * `Encodable`, `Decodable`, `Ord`, `TotalOrd`, `TotalEq`, `DeepClone`,
5358 `Rand`, `Zero` and `ToStr` can all be automatically derived with
5360 * The `bytes!` macro returns a vector of bytes for string, u8, char,
5361 and unsuffixed integer literals.
5364 * The `core` crate was renamed to `std`.
5365 * The `std` crate was renamed to `extra`.
5366 * More and improved documentation.
5367 * std: `iterator` module for external iterator objects.
5368 * Many old-style (internal, higher-order function) iterators replaced by
5369 implementations of `Iterator`.
5370 * std: Many old internal vector and string iterators,
5371 incl. `any`, `all`. removed.
5372 * std: The `finalize` method of `Drop` renamed to `drop`.
5373 * std: The `drop` method now takes `&mut self` instead of `&self`.
5374 * std: The prelude no longer reexports any modules, only types and traits.
5375 * std: Prelude additions: `print`, `println`, `FromStr`, `ApproxEq`, `Equiv`,
5376 `Iterator`, `IteratorUtil`, many numeric traits, many tuple traits.
5377 * std: New numeric traits: `Fractional`, `Real`, `RealExt`, `Integer`, `Ratio`,
5378 `Algebraic`, `Trigonometric`, `Exponential`, `Primitive`.
5379 * std: Tuple traits and accessors defined for up to 12-tuples, e.g.
5380 `(0, 1, 2).n2()` or `(0, 1, 2).n2_ref()`.
5381 * std: Many types implement `Clone`.
5382 * std: `path` type renamed to `Path`.
5383 * std: `mut` module and `Mut` type removed.
5384 * std: Many standalone functions removed in favor of methods and iterators
5385 in `vec`, `str`. In the future methods will also work as functions.
5386 * std: `reinterpret_cast` removed. Use `transmute`.
5387 * std: ascii string handling in `std::ascii`.
5388 * std: `Rand` is implemented for ~/@.
5389 * std: `run` module for spawning processes overhauled.
5390 * std: Various atomic types added to `unstable::atomic`.
5391 * std: Various types implement `Zero`.
5392 * std: `LinearMap` and `LinearSet` renamed to `HashMap` and `HashSet`.
5393 * std: Borrowed pointer functions moved from `ptr` to `borrow`.
5394 * std: Added `os::mkdir_recursive`.
5395 * std: Added `os::glob` function performs filesystems globs.
5396 * std: `FuzzyEq` renamed to `ApproxEq`.
5397 * std: `Map` now defines `pop` and `swap` methods.
5398 * std: `Cell` constructors converted to static methods.
5399 * extra: `rc` module adds the reference counted pointers, `Rc` and `RcMut`.
5400 * extra: `flate` module moved from `std` to `extra`.
5401 * extra: `fileinput` module for iterating over a series of files.
5402 * extra: `Complex` number type and `complex` module.
5403 * extra: `Rational` number type and `rational` module.
5404 * extra: `BigInt`, `BigUint` implement numeric and comparison traits.
5405 * extra: `term` uses terminfo now, is more correct.
5406 * extra: `arc` functions converted to methods.
5407 * extra: Implementation of fixed output size variations of SHA-2.
5410 * `unused_variable` lint mode for unused variables (default: warn).
5411 * `unused_unsafe` lint mode for detecting unnecessary `unsafe` blocks
5413 * `unused_mut` lint mode for identifying unused `mut` qualifiers
5415 * `dead_assignment` lint mode for unread variables (default: warn).
5416 * `unnecessary_allocation` lint mode detects some heap allocations that are
5417 immediately borrowed so could be written without allocating (default: warn).
5418 * `missing_doc` lint mode (default: allow).
5419 * `unreachable_code` lint mode (default: warn).
5420 * The `rusti` command has been rewritten and a number of bugs addressed.
5421 * rustc outputs in color on more terminals.
5422 * rustc accepts a `--link-args` flag to pass arguments to the linker.
5423 * rustc accepts a `-Z print-link-args` flag for debugging linkage.
5424 * Compiling with `-g` will make the binary record information about
5425 dynamic borrowcheck failures for debugging.
5426 * rustdoc has a nicer stylesheet.
5427 * Various improvements to rustdoc.
5428 * Improvements to rustpkg (see the detailed release notes).
5431 Version 0.6 (2013-04-03)
5432 ========================
5434 * ~2100 changes, numerous bugfixes
5437 * The self type parameter in traits is now spelled `Self`
5438 * The `self` parameter in trait and impl methods must now be explicitly
5439 named (for example: `fn f(&self) { }`). Implicit self is deprecated.
5440 * Static methods no longer require the `static` keyword and instead
5441 are distinguished by the lack of a `self` parameter
5442 * Replaced the `Durable` trait with the `'static` lifetime
5443 * The old closure type syntax with the trailing sigil has been
5444 removed in favor of the more consistent leading sigil
5445 * `super` is a keyword, and may be prefixed to paths
5446 * Trait bounds are separated with `+` instead of whitespace
5447 * Traits are implemented with `impl Trait for Type`
5448 instead of `impl Type: Trait`
5449 * Lifetime syntax is now `&'l foo` instead of `&l/foo`
5450 * The `export` keyword has finally been removed
5451 * The `move` keyword has been removed (see "Semantic changes")
5452 * The interior mutability qualifier on vectors, `[mut T]`, has been
5453 removed. Use `&mut [T]`, etc.
5454 * `mut` is no longer valid in `~mut T`. Use inherited mutability
5455 * `fail` is no longer a keyword. Use `fail!()`
5456 * `assert` is no longer a keyword. Use `assert!()`
5457 * `log` is no longer a keyword. use `debug!`, etc.
5458 * 1-tuples may be represented as `(T,)`
5459 * Struct fields may no longer be `mut`. Use inherited mutability,
5460 `@mut T`, `core::mut` or `core::cell`
5461 * `extern mod { ... }` is no longer valid syntax for foreign
5462 function modules. Use extern blocks: `extern { ... }`
5463 * Newtype enums removed. Use tuple-structs.
5464 * Trait implementations no longer support visibility modifiers
5465 * Pattern matching over vectors improved and expanded
5466 * `const` renamed to `static` to correspond to lifetime name,
5467 and make room for future `static mut` unsafe mutable globals.
5468 * Replaced `#[deriving_eq]` with `#[deriving(Eq)]`, etc.
5469 * `Clone` implementations can be automatically generated with
5470 `#[deriving(Clone)]`
5471 * Casts to traits must use a pointer sigil, e.g. `@foo as @Bar`
5472 instead of `foo as Bar`.
5473 * Fixed length vector types are now written as `[int, .. 3]`
5474 instead of `[int * 3]`.
5475 * Fixed length vector types can express the length as a constant
5476 expression. (ex: `[int, .. GL_BUFFER_SIZE - 2]`)
5479 * Types with owned pointers or custom destructors move by default,
5480 eliminating the `move` keyword
5481 * All foreign functions are considered unsafe
5482 * &mut is now unaliasable
5483 * Writes to borrowed @mut pointers are prevented dynamically
5485 * The name of the main function can be customized using #[main]
5486 * The default type of an inferred closure is &fn instead of @fn
5487 * `use` statements may no longer be "chained" - they cannot import
5488 identifiers imported by previous `use` statements
5489 * `use` statements are crate relative, importing from the "top"
5490 of the crate by default. Paths may be prefixed with `super::`
5491 or `self::` to change the search behavior.
5492 * Method visibility is inherited from the implementation declaration
5493 * Structural records have been removed
5494 * Many more types can be used in static items, including enums
5495 'static-lifetime pointers and vectors
5496 * Pattern matching over vectors improved and expanded
5497 * Typechecking of closure types has been overhauled to
5498 improve inference and eliminate unsoundness
5499 * Macros leave scope at the end of modules, unless that module is
5500 tagged with #[macro_escape]
5503 * Added big integers to `std::bigint`
5504 * Removed `core::oldcomm` module
5505 * Added pipe-based `core::comm` module
5506 * Numeric traits have been reorganized under `core::num`
5507 * `vec::slice` finally returns a slice
5508 * `debug!` and friends don't require a format string, e.g. `debug!(Foo)`
5509 * Containers reorganized around traits in `core::container`
5510 * `core::dvec` removed, `~[T]` is a drop-in replacement
5511 * `core::send_map` renamed to `core::hashmap`
5512 * `std::map` removed; replaced with `core::hashmap`
5513 * `std::treemap` reimplemented as an owned balanced tree
5514 * `std::deque` and `std::smallintmap` reimplemented as owned containers
5515 * `core::trie` added as a fast ordered map for integer keys
5516 * Set types added to `core::hashmap`, `core::trie` and `std::treemap`
5517 * `Ord` split into `Ord` and `TotalOrd`. `Ord` is still used to
5518 overload the comparison operators, whereas `TotalOrd` is used
5519 by certain container types
5522 * Replaced the 'cargo' package manager with 'rustpkg'
5523 * Added all-purpose 'rust' tool
5524 * `rustc --test` now supports benchmarks with the `#[bench]` attribute
5525 * rustc now *attempts* to offer spelling suggestions
5526 * Improved support for ARM and Android
5527 * Preliminary MIPS backend
5528 * Improved foreign function ABI implementation for x86, x86_64
5529 * Various memory usage improvements
5530 * Rust code may be embedded in foreign code under limited circumstances
5531 * Inline assembler supported by new asm!() syntax extension.
5534 Version 0.5 (2012-12-21)
5535 ===========================
5537 * ~900 changes, numerous bugfixes
5540 * Removed `<-` move operator
5541 * Completed the transition from the `#fmt` extension syntax to `fmt!`
5542 * Removed old fixed length vector syntax - `[T]/N`
5543 * New token-based quasi-quoters, `quote_tokens!`, `quote_expr!`, etc.
5544 * Macros may now expand to items and statements
5545 * `a.b()` is always parsed as a method call, never as a field projection
5546 * `Eq` and `IterBytes` implementations can be automatically generated
5547 with `#[deriving_eq]` and `#[deriving_iter_bytes]` respectively
5548 * Removed the special crate language for `.rc` files
5549 * Function arguments may consist of any irrefutable pattern
5552 * `&` and `~` pointers may point to objects
5553 * Tuple structs - `struct Foo(Bar, Baz)`. Will replace newtype enums.
5554 * Enum variants may be structs
5555 * Destructors can be added to all nominal types with the Drop trait
5556 * Structs and nullary enum variants may be constants
5557 * Values that cannot be implicitly copied are now automatically moved
5558 without writing `move` explicitly
5559 * `&T` may now be coerced to `*T`
5560 * Coercions happen in `let` statements as well as function calls
5561 * `use` statements now take crate-relative paths
5562 * The module and type namespaces have been merged so that static
5563 method names can be resolved under the trait in which they are
5566 * Improved support for language features
5567 * Trait inheritance works in many scenarios
5568 * More support for explicit self arguments in methods - `self`, `&self`
5569 `@self`, and `~self` all generally work as expected
5570 * Static methods work in more situations
5571 * Experimental: Traits may declare default methods for the implementations
5575 * New condition handling system in `core::condition`
5576 * Timsort added to `std::sort`
5577 * New priority queue, `std::priority_queue`
5578 * Pipes for serializable types, `std::flatpipes'
5579 * Serialization overhauled to be trait-based
5580 * Expanded `getopts` definitions
5581 * Moved futures to `std`
5582 * More functions are pure now
5583 * `core::comm` renamed to `oldcomm`. Still deprecated
5584 * `rustdoc` and `cargo` are libraries now
5587 * Added a preliminary REPL, `rusti`
5588 * License changed from MIT to dual MIT/APL2
5591 Version 0.4 (2012-10-15)
5592 ==========================
5594 * ~2000 changes, numerous bugfixes
5597 * All keywords are now strict and may not be used as identifiers anywhere
5598 * Keyword removal: 'again', 'import', 'check', 'new', 'owned', 'send',
5599 'of', 'with', 'to', 'class'.
5600 * Classes are replaced with simpler structs
5601 * Explicit method self types
5602 * `ret` became `return` and `alt` became `match`
5603 * `import` is now `use`; `use is now `extern mod`
5604 * `extern mod { ... }` is now `extern { ... }`
5605 * `use mod` is the recommended way to import modules
5606 * `pub` and `priv` replace deprecated export lists
5607 * The syntax of `match` pattern arms now uses fat arrow (=>)
5608 * `main` no longer accepts an args vector; use `os::args` instead
5611 * Trait implementations are now coherent, ala Haskell typeclasses
5612 * Trait methods may be static
5613 * Argument modes are deprecated
5614 * Borrowed pointers are much more mature and recommended for use
5615 * Strings and vectors in the static region are stored in constant memory
5616 * Typestate was removed
5617 * Resolution rewritten to be more reliable
5618 * Support for 'dual-mode' data structures (freezing and thawing)
5621 * Most binary operators can now be overloaded via the traits in
5623 * `std::net::url` for representing URLs
5624 * Sendable hash maps in `core::send_map`
5625 * `core::task' gained a (currently unsafe) task-local storage API
5628 * An efficient new intertask communication primitive called the pipe,
5629 along with a number of higher-level channel types, in `core::pipes`
5630 * `std::arc`, an atomically reference counted, immutable, shared memory
5632 * `std::sync`, various exotic synchronization tools based on arcs and pipes
5633 * Futures are now based on pipes and sendable
5634 * More robust linked task failure
5635 * Improved task builder API
5638 * Improved error reporting
5639 * Preliminary JIT support
5640 * Preliminary work on precise GC
5641 * Extensive architectural improvements to rustc
5642 * Begun a transition away from buggy C++-based reflection (shape) code to
5643 Rust-based (visitor) code
5644 * All hash functions and tables converted to secure, randomized SipHash
5647 Version 0.3 (2012-07-12)
5648 ========================
5650 * ~1900 changes, numerous bugfixes
5652 * New coding conveniences
5653 * Integer-literal suffix inference
5654 * Per-item control over warnings, errors
5655 * #[cfg(windows)] and #[cfg(unix)] attributes
5656 * Documentation comments
5657 * More compact closure syntax
5658 * 'do' expressions for treating higher-order functions as
5660 * *-patterns (wildcard extended to all constructor fields)
5663 * Name resolution pass and exhaustiveness checker rewritten
5664 * Region pointers and borrow checking supersede alias
5666 * Init-ness checking is now provided by a region-based liveness
5667 pass instead of the typestate pass; same for last-use analysis
5668 * Extensive work on region pointers
5670 * Experimental new language features
5671 * Slices and fixed-size, interior-allocated vectors
5672 * #!-comments for lang versioning, shell execution
5673 * Destructors and iface implementation for classes;
5674 type-parameterized classes and class methods
5675 * 'const' type kind for types that can be used to implement
5676 shared-memory concurrency patterns
5680 * Removal of various obsolete features
5681 * Keywords: 'be', 'prove', 'syntax', 'note', 'mutable', 'bind',
5682 'crust', 'native' (now 'extern'), 'cont' (now 'again')
5684 * Constructs: do-while loops ('do' repurposed), fn binding,
5685 resources (replaced by destructors)
5687 * Compiler reorganization
5688 * Syntax-layer of compiler split into separate crate
5689 * Clang (from LLVM project) integrated into build
5690 * Typechecker split into sub-modules
5693 * New time functions
5694 * Extension methods for many built-in types
5695 * Arc: atomic-refcount read-only / exclusive-use shared cells
5696 * Par: parallel map and search routines
5697 * Extensive work on libuv interface
5698 * Much vector code moved to libraries
5699 * Syntax extensions: #line, #col, #file, #mod, #stringify,
5700 #include, #include_str, #include_bin
5703 * Cargo automatically resolves dependencies
5706 Version 0.2 (2012-03-29)
5707 =========================
5709 * >1500 changes, numerous bugfixes
5711 * New docs and doc tooling
5713 * New port: FreeBSD x86_64
5715 * Compilation model enhancements
5716 * Generics now specialized, multiply instantiated
5717 * Functions now inlined across separate crates
5719 * Scheduling, stack and threading fixes
5720 * Noticeably improved message-passing performance
5721 * Explicit schedulers
5725 * Experimental new language features
5726 * Operator overloading
5730 * Various language extensions
5731 * C-callback function types: 'crust fn ...'
5732 * Infinite-loop construct: 'loop { ... }'
5733 * Shorten 'mutable' to 'mut'
5734 * Required mutable-local qualifier: 'let mut ...'
5735 * Basic glob-exporting: 'export foo::*;'
5736 * Alt now exhaustive, 'alt check' for runtime-checked
5737 * Block-function form of 'for' loop, with 'break' and 'ret'.
5740 * AST quasi-quote syntax extension
5741 * Revived libuv interface
5742 * New modules: core::{future, iter}, std::arena
5743 * Merged per-platform std::{os*, fs*} to core::{libc, os}
5744 * Extensive cleanup, regularization in libstd, libcore
5747 Version 0.1 (2012-01-20)
5748 ===============================
5750 * Most language features work, including:
5751 * Unique pointers, unique closures, move semantics
5752 * Interface-constrained generics
5753 * Static interface dispatch
5755 * Multithread task scheduling
5756 * Typestate predicates
5757 * Failure unwinding, destructors
5758 * Pattern matching and destructuring assignment
5759 * Lightweight block-lambda syntax
5760 * Preliminary macro-by-example
5762 * Compiler works with the following configurations:
5763 * Linux: x86 and x86_64 hosts and targets
5764 * macOS: x86 and x86_64 hosts and targets
5765 * Windows: x86 hosts and targets
5767 * Cross compilation / multi-target configuration supported.
5769 * Preliminary API-documentation and package-management tools included.
5773 * Documentation is incomplete.
5775 * Performance is below intended target.
5777 * Standard library APIs are subject to extensive change, reorganization.
5779 * Language-level versioning is not yet operational - future code will