1 Version 1.20.0 (2017-08-31)
2 ===========================
6 - [Associated constants in traits is now stabilised.][42809]
7 - [A lot of macro bugs are now fixed.][42913]
12 - [Struct fields are now properly coerced to the expected field type.][42807]
13 - [Enabled wasm LLVM backend][42571] WASM can now be built with the
14 `wasm32-experimental-emscripten` target.
15 - [Changed some of the error messages to be more helpful.][42033]
16 - [Add support for RELRO(RELocation Read-Only) for platforms that support
18 - [rustc now reports the total number of errors on compilation failure][43015]
19 previously this was only the number of errors in the pass that failed.
20 - [Expansion in rustc has been sped up 29x.][42533]
21 - [added `msp430-none-elf` target.][43099]
22 - [rustc will now suggest one-argument enum variant to fix type mismatch when
24 - [Fixes backtraces on Redox][43228]
25 - [rustc now identifies different versions of same crate when absolute paths of
26 different types match in an error message.][42826]
32 - [Relaxed Debug constraints on `{HashMap,BTreeMap}::{Keys,Values}`.][42854]
33 - [Impl `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Debug`, `Hash` for unsized
35 - [Impl `fmt::{Display, Debug}` for `Ref`, `RefMut`, `MutexGuard`,
36 `RwLockReadGuard`, `RwLockWriteGuard`][42822]
37 - [Impl `Clone` for `DefaultHasher`.][42799]
38 - [Impl `Sync` for `SyncSender`.][42397]
39 - [Impl `FromStr` for `char`][42271]
40 - [Fixed how `{f32, f64}::{is_sign_negative, is_sign_positive}` handles
42 - [allow messages in the `unimplemented!()` macro.][42155]
43 ie. `unimplemented!("Waiting for 1.21 to be stable")`
44 - [`pub(restricted)` is now supported in the `thread_local!` macro.][43185]
45 - [Upgrade to Unicode 10.0.0][42999]
46 - [Reimplemented `{f32, f64}::{min, max}` in Rust instead of using CMath.][42430]
47 - [Skip the main thread's manual stack guard on Linux][43072]
48 - [Iterator::nth for `ops::{Range, RangeFrom}` is now done in O(1) time][43077]
49 - [`#[repr(align(N))]` attribute max number is now 2^31 - 1.][43097] This was
51 - [`{OsStr, Path}::Display` now avoids allocations where possible][42613]
56 - [`CStr::into_c_string`]
57 - [`CString::as_c_str`]
58 - [`CString::into_boxed_c_str`]
61 - [`Chain::into_inner`]
62 - [`Option::get_or_insert_with`]
63 - [`Option::get_or_insert`]
64 - [`OsStr::into_os_string`]
65 - [`OsString::into_boxed_os_str`]
68 - [`Utf8Error::error_len`]
69 - [`char::EscapeDebug`]
70 - [`char::escape_debug`]
76 - [`mem::ManuallyDrop`]
77 - [`slice::sort_unstable_by_key`]
78 - [`slice::sort_unstable_by`]
79 - [`slice::sort_unstable`]
80 - [`ste::from_boxed_utf8_unchecked`]
81 - [`str::as_bytes_mut`]
82 - [`str::as_bytes_mut`]
83 - [`str::from_utf8_mut`]
84 - [`str::from_utf8_unchecked_mut`]
86 - [`str::get_unchecked_mut`]
87 - [`str::get_unchecked`]
89 - [`str::into_boxed_bytes`]
94 - [Cargo API token location moved from `~/.cargo/config` to
95 `~/cargo/credentials`.][cargo/3978]
96 - [Cargo will now build `main.rs` binaries that are in sub-directories of
97 `src/bin`.][cargo/4214] ie. Having `src/bin/server/main.rs` and
98 `src/bin/client/main.rs` generates `target/debug/server` and `target/debug/client`
99 - [You can now specify version of a binary when installed through
100 `cargo install` using `--vers`.][cargo/4229]
101 - [Added `--no-fail-fast` flag to cargo to run all benchmarks regardless of
102 failure.][cargo/4248]
103 - [Changed the convention around which file is the crate root.][cargo/4259]
104 - [The `include`/`exclude` property in `Cargo.toml` now accepts gitignore paths
105 instead of glob patterns][cargo/4270]. Glob patterns are now deprecated.
110 - [Functions with `'static` in their return types will now not be as usable as
111 if they were using lifetime parameters instead.][42417]
112 - [The reimplementation of `{f32, f64}::is_sign_{negative, positive}` now
113 takes the sign of NaN into account where previously didn't.][42430]
115 [42033]: https://github.com/rust-lang/rust/pull/42033
116 [42155]: https://github.com/rust-lang/rust/pull/42155
117 [42271]: https://github.com/rust-lang/rust/pull/42271
118 [42397]: https://github.com/rust-lang/rust/pull/42397
119 [42417]: https://github.com/rust-lang/rust/pull/42417
120 [42430]: https://github.com/rust-lang/rust/pull/42430
121 [42431]: https://github.com/rust-lang/rust/pull/42431
122 [42533]: https://github.com/rust-lang/rust/pull/42533
123 [42571]: https://github.com/rust-lang/rust/pull/42571
124 [42613]: https://github.com/rust-lang/rust/pull/42613
125 [42799]: https://github.com/rust-lang/rust/pull/42799
126 [42807]: https://github.com/rust-lang/rust/pull/42807
127 [42809]: https://github.com/rust-lang/rust/pull/42809
128 [42822]: https://github.com/rust-lang/rust/pull/42822
129 [42826]: https://github.com/rust-lang/rust/pull/42826
130 [42854]: https://github.com/rust-lang/rust/pull/42854
131 [42913]: https://github.com/rust-lang/rust/pull/42913
132 [42999]: https://github.com/rust-lang/rust/pull/42999
133 [43011]: https://github.com/rust-lang/rust/pull/43011
134 [43015]: https://github.com/rust-lang/rust/pull/43015
135 [43072]: https://github.com/rust-lang/rust/pull/43072
136 [43077]: https://github.com/rust-lang/rust/pull/43077
137 [43097]: https://github.com/rust-lang/rust/pull/43097
138 [43099]: https://github.com/rust-lang/rust/pull/43099
139 [43170]: https://github.com/rust-lang/rust/pull/43170
140 [43178]: https://github.com/rust-lang/rust/pull/43178
141 [43185]: https://github.com/rust-lang/rust/pull/43185
142 [43228]: https://github.com/rust-lang/rust/pull/43228
143 [cargo/3978]: https://github.com/rust-lang/cargo/pull/3978
144 [cargo/4214]: https://github.com/rust-lang/cargo/pull/4214
145 [cargo/4229]: https://github.com/rust-lang/cargo/pull/4229
146 [cargo/4248]: https://github.com/rust-lang/cargo/pull/4248
147 [cargo/4259]: https://github.com/rust-lang/cargo/pull/4259
148 [cargo/4270]: https://github.com/rust-lang/cargo/pull/4270
149 [`CStr::into_c_string`]: https://doc.rust-lang.org/std/ffi/struct.CStr.html#method.into_c_string
150 [`CString::as_c_str`]: https://doc.rust-lang.org/std/ffi/struct.CString.html#method.as_c_str
151 [`CString::into_boxed_c_str`]: https://doc.rust-lang.org/std/ffi/struct.CString.html#method.into_boxed_c_str
152 [`Chain::get_mut`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.get_mut
153 [`Chain::get_ref`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.get_ref
154 [`Chain::into_inner`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.into_inner
155 [`Option::get_or_insert_with`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.get_or_insert_with
156 [`Option::get_or_insert`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.get_or_insert
157 [`OsStr::into_os_string`]: https://doc.rust-lang.org/std/ffi/struct.OsStr.html#method.into_os_string
158 [`OsString::into_boxed_os_str`]: https://doc.rust-lang.org/std/ffi/struct.OsString.html#method.into_boxed_os_str
159 [`Take::get_mut`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.get_mut
160 [`Take::get_ref`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.get_ref
161 [`Utf8Error::error_len`]: https://doc.rust-lang.org/std/str/struct.Utf8Error.html#method.error_len
162 [`char::EscapeDebug`]: https://doc.rust-lang.org/std/char/struct.EscapeDebug.html
163 [`char::escape_debug`]: https://doc.rust-lang.org/std/primitive.char.html#method.escape_debug
164 [`compile_error!`]: https://doc.rust-lang.org/std/macro.compile_error.html
165 [`f32::from_bits`]: https://doc.rust-lang.org/std/primitive.f32.html#method.from_bits
166 [`f32::to_bits`]: https://doc.rust-lang.org/std/primitive.f32.html#method.to_bits
167 [`f64::from_bits`]: https://doc.rust-lang.org/std/primitive.f64.html#method.from_bits
168 [`f64::to_bits`]: https://doc.rust-lang.org/std/primitive.f64.html#method.to_bits
169 [`mem::ManuallyDrop`]: https://doc.rust-lang.org/std/mem/union.ManuallyDrop.html
170 [`slice::sort_unstable_by_key`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable_by_key
171 [`slice::sort_unstable_by`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable_by
172 [`slice::sort_unstable`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable
173 [`ste::from_boxed_utf8_unchecked`]: https://doc.rust-lang.org/std/str/fn.from_boxed_utf8_unchecked.html
174 [`str::as_bytes_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.as_bytes_mut
175 [`str::as_bytes_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.as_bytes_mut
176 [`str::from_utf8_mut`]: https://doc.rust-lang.org/std/str/fn.from_utf8_mut.html
177 [`str::from_utf8_unchecked_mut`]: https://doc.rust-lang.org/std/str/fn.from_utf8_unchecked_mut.html
178 [`str::get_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_mut
179 [`str::get_unchecked_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_unchecked_mut
180 [`str::get_unchecked`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_unchecked
181 [`str::get`]: https://doc.rust-lang.org/std/primitive.str.html#method.get
182 [`str::into_boxed_bytes`]: https://doc.rust-lang.org/std/primitive.str.html#method.into_boxed_bytes
185 Version 1.19.0 (2017-07-20)
186 ===========================
191 - [Numeric fields can now be used for creating tuple structs.][41145] [RFC 1506]
192 For example `struct Point(u32, u32); let x = Point { 0: 7, 1: 0 };`.
193 - [Macro recursion limit increased to 1024 from 64.][41676]
194 - [Added lint for detecting unused macros.][41907]
195 - [`loop` can now return a value with `break`.][42016] [RFC 1624]
196 For example: `let x = loop { break 7; };`
197 - [C compatible `union`s are now available.][42068] [RFC 1444] They can only
198 contain `Copy` types and cannot have a `Drop` implementation.
199 Example: `union Foo { bar: u8, baz: usize }`
200 - [Non capturing closures can now be coerced into `fn`s,][42162] [RFC 1558]
201 Example: `let foo: fn(u8) -> u8 = |v: u8| { v };`
206 - [Add support for bootstrapping the Rust compiler toolchain on Android.][41370]
207 - [Change `arm-linux-androideabi` to correspond to the `armeabi`
208 official ABI.][41656] If you wish to continue targeting the `armeabi-v7a` ABI
209 you should use `--target armv7-linux-androideabi`.
210 - [Fixed ICE when removing a source file between compilation sessions.][41873]
211 - [Minor optimisation of string operations.][42037]
212 - [Compiler error message is now `aborting due to previous error(s)` instead of
213 `aborting due to N previous errors`][42150] This was previously inaccurate and
214 would only count certain kinds of errors.
215 - [The compiler now supports Visual Studio 2017][42225]
216 - [The compiler is now built against LLVM 4.0.1 by default][42948]
217 - [Added a lot][42264] of [new error codes][42302]
218 - [Added `target-feature=+crt-static` option][37406] [RFC 1721] Which allows
219 libraries with C Run-time Libraries(CRT) to be statically linked.
220 - [Fixed various ARM codegen bugs][42740]
225 - [`String` now implements `FromIterator<Cow<'a, str>>` and
226 `Extend<Cow<'a, str>>`][41449]
227 - [`Vec` now implements `From<&mut [T]>`][41530]
228 - [`Box<[u8]>` now implements `From<Box<str>>`][41258]
229 - [`SplitWhitespace` now implements `Clone`][41659]
230 - [`[u8]::reverse` is now 5x faster and `[u16]::reverse` is now
232 - [`eprint!` and `eprintln!` macros added to prelude.][41192] Same as the `print!`
233 macros, but for printing to stderr.
238 - [`OsString::shrink_to_fit`]
241 - [`thread::ThreadId`]
246 - [Build scripts can now add environment variables to the environment
247 the crate is being compiled in.
248 Example: `println!("cargo:rustc-env=FOO=bar");`][cargo/3929]
249 - [Subcommands now replace the current process rather than spawning a new
250 child process][cargo/3970]
251 - [Workspace members can now accept glob file patterns][cargo/3979]
252 - [Added `--all` flag to the `cargo bench` subcommand to run benchmarks of all
253 the members in a given workspace.][cargo/3988]
254 - [Updated `libssh2-sys` to 0.2.6][cargo/4008]
255 - [Target directory path is now in the cargo metadata][cargo/4022]
256 - [Cargo no longer checks out a local working directory for the
257 crates.io index][cargo/4026] This should provide smaller file size for the
258 registry, and improve cloning times, especially on Windows machines.
259 - [Added an `--exclude` option for excluding certain packages when using the
260 `--all` option][cargo/4031]
261 - [Cargo will now automatically retry when receiving a 5xx error
262 from crates.io][cargo/4032]
263 - [The `--features` option now accepts multiple comma or space
264 delimited values.][cargo/4084]
265 - [Added support for custom target specific runners][cargo/3954]
270 - [Added `rust-windbg.cmd`][39983] for loading rust `.natvis` files in the
272 - [Rust will now release XZ compressed packages][rust-installer/57]
273 - [rustup will now prefer to download rust packages with
274 XZ compression][rustup/1100] over GZip packages.
275 - [Added the ability to escape `#` in rust documentation][41785] By adding
276 additional `#`'s ie. `##` is now `#`
281 - [`MutexGuard<T>` may only be `Sync` if `T` is `Sync`.][41624]
282 - [`-Z` flags are now no longer allowed to be used on the stable
283 compiler.][41751] This has been a warning for a year previous to this.
284 - [As a result of the `-Z` flag change, the `cargo-check` plugin no
285 longer works][42844]. Users should migrate to the built-in `check`
286 command, which has been available since 1.16.
287 - [Ending a float literal with `._` is now a hard error.
288 Example: `42._` .][41946]
289 - [Any use of a private `extern crate` outside of its module is now a
290 hard error.][36886] This was previously a warning.
291 - [`use ::self::foo;` is now a hard error.][36888] `self` paths are always
292 relative while the `::` prefix makes a path absolute, but was ignored and the
293 path was relative regardless.
294 - [Floating point constants in match patterns is now a hard error][36890]
295 This was previously a warning.
296 - [Struct or enum constants that don't derive `PartialEq` & `Eq` used
297 match patterns is now a hard error][36891] This was previously a warning.
298 - [Lifetimes named `'_` are no longer allowed.][36892] This was previously
300 - [From the pound escape, lines consisting of multiple `#`s are
302 - [It is an error to reexport private enum variants][42460]. This is
303 known to break a number of crates that depend on an older version of
305 - [On Windows, if `VCINSTALLDIR` is set incorrectly, `rustc` will try
306 to use it to find the linker, and the build will fail where it did
307 not previously][42607]
309 [36886]: https://github.com/rust-lang/rust/issues/36886
310 [36888]: https://github.com/rust-lang/rust/issues/36888
311 [36890]: https://github.com/rust-lang/rust/issues/36890
312 [36891]: https://github.com/rust-lang/rust/issues/36891
313 [36892]: https://github.com/rust-lang/rust/issues/36892
314 [37406]: https://github.com/rust-lang/rust/issues/37406
315 [39983]: https://github.com/rust-lang/rust/pull/39983
316 [41145]: https://github.com/rust-lang/rust/pull/41145
317 [41192]: https://github.com/rust-lang/rust/pull/41192
318 [41258]: https://github.com/rust-lang/rust/pull/41258
319 [41370]: https://github.com/rust-lang/rust/pull/41370
320 [41449]: https://github.com/rust-lang/rust/pull/41449
321 [41530]: https://github.com/rust-lang/rust/pull/41530
322 [41624]: https://github.com/rust-lang/rust/pull/41624
323 [41656]: https://github.com/rust-lang/rust/pull/41656
324 [41659]: https://github.com/rust-lang/rust/pull/41659
325 [41676]: https://github.com/rust-lang/rust/pull/41676
326 [41751]: https://github.com/rust-lang/rust/pull/41751
327 [41764]: https://github.com/rust-lang/rust/pull/41764
328 [41785]: https://github.com/rust-lang/rust/pull/41785
329 [41873]: https://github.com/rust-lang/rust/pull/41873
330 [41907]: https://github.com/rust-lang/rust/pull/41907
331 [41946]: https://github.com/rust-lang/rust/pull/41946
332 [42016]: https://github.com/rust-lang/rust/pull/42016
333 [42037]: https://github.com/rust-lang/rust/pull/42037
334 [42068]: https://github.com/rust-lang/rust/pull/42068
335 [42150]: https://github.com/rust-lang/rust/pull/42150
336 [42162]: https://github.com/rust-lang/rust/pull/42162
337 [42225]: https://github.com/rust-lang/rust/pull/42225
338 [42264]: https://github.com/rust-lang/rust/pull/42264
339 [42302]: https://github.com/rust-lang/rust/pull/42302
340 [42460]: https://github.com/rust-lang/rust/issues/42460
341 [42607]: https://github.com/rust-lang/rust/issues/42607
342 [42740]: https://github.com/rust-lang/rust/pull/42740
343 [42844]: https://github.com/rust-lang/rust/issues/42844
344 [42948]: https://github.com/rust-lang/rust/pull/42948
345 [RFC 1444]: https://github.com/rust-lang/rfcs/pull/1444
346 [RFC 1506]: https://github.com/rust-lang/rfcs/pull/1506
347 [RFC 1558]: https://github.com/rust-lang/rfcs/pull/1558
348 [RFC 1624]: https://github.com/rust-lang/rfcs/pull/1624
349 [RFC 1721]: https://github.com/rust-lang/rfcs/pull/1721
350 [`Command::envs`]: https://doc.rust-lang.org/std/process/struct.Command.html#method.envs
351 [`OsString::shrink_to_fit`]: https://doc.rust-lang.org/std/ffi/struct.OsString.html#method.shrink_to_fit
352 [`cmp::Reverse`]: https://doc.rust-lang.org/std/cmp/struct.Reverse.html
353 [`thread::ThreadId`]: https://doc.rust-lang.org/std/thread/struct.ThreadId.html
354 [cargo/3929]: https://github.com/rust-lang/cargo/pull/3929
355 [cargo/3954]: https://github.com/rust-lang/cargo/pull/3954
356 [cargo/3970]: https://github.com/rust-lang/cargo/pull/3970
357 [cargo/3979]: https://github.com/rust-lang/cargo/pull/3979
358 [cargo/3988]: https://github.com/rust-lang/cargo/pull/3988
359 [cargo/4008]: https://github.com/rust-lang/cargo/pull/4008
360 [cargo/4022]: https://github.com/rust-lang/cargo/pull/4022
361 [cargo/4026]: https://github.com/rust-lang/cargo/pull/4026
362 [cargo/4031]: https://github.com/rust-lang/cargo/pull/4031
363 [cargo/4032]: https://github.com/rust-lang/cargo/pull/4032
364 [cargo/4084]: https://github.com/rust-lang/cargo/pull/4084
365 [rust-installer/57]: https://github.com/rust-lang/rust-installer/pull/57
366 [rustup/1100]: https://github.com/rust-lang-nursery/rustup.rs/pull/1100
369 Version 1.18.0 (2017-06-08)
370 ===========================
375 - [Stabilize pub(restricted)][40556] `pub` can now accept a module path to
376 make the item visible to just that module tree. Also accepts the keyword
377 `crate` to make something public to the whole crate but not users of the
378 library. Example: `pub(crate) mod utils;`. [RFC 1422].
379 - [Stabilize `#![windows_subsystem]` attribute][40870] conservative exposure of the
380 `/SUBSYSTEM` linker flag on Windows platforms. [RFC 1665].
381 - [Refactor of trait object type parsing][40043] Now `ty` in macros can accept
382 types like `Write + Send`, trailing `+` are now supported in trait objects,
383 and better error reporting for trait objects starting with `?Sized`.
384 - [0e+10 is now a valid floating point literal][40589]
385 - [Now warns if you bind a lifetime parameter to 'static][40734]
386 - [Tuples, Enum variant fields, and structs with no `repr` attribute or with
387 `#[repr(Rust)]` are reordered to minimize padding and produce a smaller
388 representation in some cases.][40377]
393 - [rustc can now emit mir with `--emit mir`][39891]
394 - [Improved LLVM IR for trivial functions][40367]
395 - [Added explanation for E0090(Wrong number of lifetimes are supplied)][40723]
396 - [rustc compilation is now 15%-20% faster][41469] Thanks to optimisation
397 opportunities found through profiling
398 - [Improved backtrace formatting when panicking][38165]
403 - [Specialized `Vec::from_iter` being passed `vec::IntoIter`][40731] if the
404 iterator hasn't been advanced the original `Vec` is reassembled with no actual
405 iteration or reallocation.
406 - [Simplified HashMap Bucket interface][40561] provides performance
407 improvements for iterating and cloning.
408 - [Specialize Vec::from_elem to use calloc][40409]
409 - [Fixed Race condition in fs::create_dir_all][39799]
410 - [No longer caching stdio on Windows][40516]
411 - [Optimized insertion sort in slice][40807] insertion sort in some cases
412 2.50%~ faster and in one case now 12.50% faster.
413 - [Optimized `AtomicBool::fetch_nand`][41143]
418 - [`Child::try_wait`]
419 - [`HashMap::retain`]
420 - [`HashSet::retain`]
422 - [`TcpStream::peek`]
423 - [`UdpSocket::peek`]
424 - [`UdpSocket::peek_from`]
429 - [Added partial Pijul support][cargo/3842] Pijul is a version control system in Rust.
430 You can now create new cargo projects with Pijul using `cargo new --vcs pijul`
431 - [Now always emits build script warnings for crates that fail to build][cargo/3847]
432 - [Added Android build support][cargo/3885]
433 - [Added `--bins` and `--tests` flags][cargo/3901] now you can build all programs
434 of a certain type, for example `cargo build --bins` will build all
436 - [Added support for haiku][cargo/3952]
441 - [rustdoc can now use pulldown-cmark with the `--enable-commonmark` flag][40338]
442 - [Added rust-winbg script for better debugging on Windows][39983]
443 - [Rust now uses the official cross compiler for NetBSD][40612]
444 - [rustdoc now accepts `#` at the start of files][40828]
445 - [Fixed jemalloc support for musl][41168]
450 - [Changes to how the `0` flag works in format!][40241] Padding zeroes are now
451 always placed after the sign if it exists and before the digits. With the `#`
452 flag the zeroes are placed after the prefix and before the digits.
453 - [Due to the struct field optimisation][40377], using `transmute` on structs
454 that have no `repr` attribute or `#[repr(Rust)]` will no longer work. This has
455 always been undefined behavior, but is now more likely to break in practice.
456 - [The refactor of trait object type parsing][40043] fixed a bug where `+` was
457 receiving the wrong priority parsing things like `&for<'a> Tr<'a> + Send` as
458 `&(for<'a> Tr<'a> + Send)` instead of `(&for<'a> Tr<'a>) + Send`
459 - [Overlapping inherent `impl`s are now a hard error][40728]
460 - [`PartialOrd` and `Ord` must agree on the ordering.][41270]
461 - [`rustc main.rs -o out --emit=asm,llvm-ir`][41085] Now will output
462 `out.asm` and `out.ll` instead of only one of the filetypes.
463 - [ calling a function that returns `Self` will no longer work][41805] when
464 the size of `Self` cannot be statically determined.
465 - [rustc now builds with a "pthreads" flavour of MinGW for Windows GNU][40805]
466 this has caused a few regressions namely:
468 - Changed the link order of local static/dynamic libraries (respecting the
469 order on given rather than having the compiler reorder).
470 - Changed how MinGW is linked, native code linked to dynamic libraries
471 may require manually linking to the gcc support library (for the native
474 [38165]: https://github.com/rust-lang/rust/pull/38165
475 [39799]: https://github.com/rust-lang/rust/pull/39799
476 [39891]: https://github.com/rust-lang/rust/pull/39891
477 [39983]: https://github.com/rust-lang/rust/pull/39983
478 [40043]: https://github.com/rust-lang/rust/pull/40043
479 [40241]: https://github.com/rust-lang/rust/pull/40241
480 [40338]: https://github.com/rust-lang/rust/pull/40338
481 [40367]: https://github.com/rust-lang/rust/pull/40367
482 [40377]: https://github.com/rust-lang/rust/pull/40377
483 [40409]: https://github.com/rust-lang/rust/pull/40409
484 [40516]: https://github.com/rust-lang/rust/pull/40516
485 [40556]: https://github.com/rust-lang/rust/pull/40556
486 [40561]: https://github.com/rust-lang/rust/pull/40561
487 [40589]: https://github.com/rust-lang/rust/pull/40589
488 [40612]: https://github.com/rust-lang/rust/pull/40612
489 [40723]: https://github.com/rust-lang/rust/pull/40723
490 [40728]: https://github.com/rust-lang/rust/pull/40728
491 [40731]: https://github.com/rust-lang/rust/pull/40731
492 [40734]: https://github.com/rust-lang/rust/pull/40734
493 [40805]: https://github.com/rust-lang/rust/pull/40805
494 [40807]: https://github.com/rust-lang/rust/pull/40807
495 [40828]: https://github.com/rust-lang/rust/pull/40828
496 [40870]: https://github.com/rust-lang/rust/pull/40870
497 [41085]: https://github.com/rust-lang/rust/pull/41085
498 [41143]: https://github.com/rust-lang/rust/pull/41143
499 [41168]: https://github.com/rust-lang/rust/pull/41168
500 [41270]: https://github.com/rust-lang/rust/issues/41270
501 [41469]: https://github.com/rust-lang/rust/pull/41469
502 [41805]: https://github.com/rust-lang/rust/issues/41805
503 [RFC 1422]: https://github.com/rust-lang/rfcs/blob/master/text/1422-pub-restricted.md
504 [RFC 1665]: https://github.com/rust-lang/rfcs/blob/master/text/1665-windows-subsystem.md
505 [`Child::try_wait`]: https://doc.rust-lang.org/std/process/struct.Child.html#method.try_wait
506 [`HashMap::retain`]: https://doc.rust-lang.org/std/collections/struct.HashMap.html#method.retain
507 [`HashSet::retain`]: https://doc.rust-lang.org/std/collections/struct.HashSet.html#method.retain
508 [`PeekMut::pop`]: https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html#method.pop
509 [`TcpStream::peek`]: https://doc.rust-lang.org/std/net/struct.TcpStream.html#method.peek
510 [`UdpSocket::peek_from`]: https://doc.rust-lang.org/std/net/struct.UdpSocket.html#method.peek_from
511 [`UdpSocket::peek`]: https://doc.rust-lang.org/std/net/struct.UdpSocket.html#method.peek
512 [cargo/3842]: https://github.com/rust-lang/cargo/pull/3842
513 [cargo/3847]: https://github.com/rust-lang/cargo/pull/3847
514 [cargo/3885]: https://github.com/rust-lang/cargo/pull/3885
515 [cargo/3901]: https://github.com/rust-lang/cargo/pull/3901
516 [cargo/3952]: https://github.com/rust-lang/cargo/pull/3952
519 Version 1.17.0 (2017-04-27)
520 ===========================
525 * [The lifetime of statics and consts defaults to `'static`][39265]. [RFC 1623]
526 * [Fields of structs may be initialized without duplicating the field/variable
527 names][39761]. [RFC 1682]
528 * [`Self` may be included in the `where` clause of `impls`][38864]. [RFC 1647]
529 * [When coercing to an unsized type lifetimes must be equal][40319]. That is,
530 there is no subtyping between `T` and `U` when `T: Unsize<U>`. For example,
531 coercing `&mut [&'a X; N]` to `&mut [&'b X]` requires `'a` be equal to
533 * [Values passed to the indexing operator, `[]`, automatically coerce][40166]
534 * [Static variables may contain references to other statics][40027]
539 * [Exit quickly on only `--emit dep-info`][40336]
540 * [Make `-C relocation-model` more correctly determine whether the linker
541 creates a position-independent executable][40245]
542 * [Add `-C overflow-checks` to directly control whether integer overflow
544 * [The rustc type checker now checks items on demand instead of in a single
545 in-order pass][40008]. This is mostly an internal refactoring in support of
546 future work, including incremental type checking, but also resolves [RFC
547 1647], allowing `Self` to appear in `impl` `where` clauses.
548 * [Optimize vtable loads][39995]
549 * [Turn off vectorization for Emscripten targets][39990]
550 * [Provide suggestions for unknown macros imported with `use`][39953]
551 * [Fix ICEs in path resolution][39939]
552 * [Strip exception handling code on Emscripten when `panic=abort`][39193]
553 * [Add clearer error message using `&str + &str`][39116]
565 * [`Ordering::then_with`]
566 * [`BTreeMap::range`]
567 * [`BTreeMap::range_mut`]
568 * [`collections::Bound`]
570 * [`ptr::read_unaligned`]
571 * [`ptr::write_unaligned`]
572 * [`Result::expect_err`]
575 * [`Cell::into_inner`]
581 * [`BTreeMap` and `BTreeSet` can iterate over ranges][27787]
582 * [`Cell` can store non-`Copy` types][39793]. [RFC 1651]
583 * [`String` implements `FromIterator<&char>`][40028]
584 * `Box` [implements][40009] a number of new conversions:
585 `From<Box<str>> for String`,
586 `From<Box<[T]>> for Vec<T>`,
587 `From<Box<CStr>> for CString`,
588 `From<Box<OsStr>> for OsString`,
589 `From<Box<Path>> for PathBuf`,
590 `Into<Box<str>> for String`,
591 `Into<Box<[T]>> for Vec<T>`,
592 `Into<Box<CStr>> for CString`,
593 `Into<Box<OsStr>> for OsString`,
594 `Into<Box<Path>> for PathBuf`,
595 `Default for Box<str>`,
596 `Default for Box<CStr>`,
597 `Default for Box<OsStr>`,
598 `From<&CStr> for Box<CStr>`,
599 `From<&OsStr> for Box<OsStr>`,
600 `From<&Path> for Box<Path>`
601 * [`ffi::FromBytesWithNulError` implements `Error` and `Display`][39960]
602 * [Specialize `PartialOrd<A> for [A] where A: Ord`][39642]
603 * [Slightly optimize `slice::sort`][39538]
604 * [Add `ToString` trait specialization for `Cow<'a, str>` and `String`][39440]
605 * [`Box<[T]>` implements `From<&[T]> where T: Copy`,
606 `Box<str>` implements `From<&str>`][39438]
607 * [`IpAddr` implements `From` for various arrays. `SocketAddr` implements
608 `From<(I, u16)> where I: Into<IpAddr>`][39372]
609 * [`format!` estimates the needed capacity before writing a string][39356]
610 * [Support unprivileged symlink creation in Windows][38921]
611 * [`PathBuf` implements `Default`][38764]
612 * [Implement `PartialEq<[A]>` for `VecDeque<A>`][38661]
613 * [`HashMap` resizes adaptively][38368] to guard against DOS attacks
614 and poor hash functions.
619 * [Add `cargo check --all`][cargo/3731]
620 * [Add an option to ignore SSL revocation checking][cargo/3699]
621 * [Add `cargo run --package`][cargo/3691]
622 * [Add `required_features`][cargo/3667]
623 * [Assume `build.rs` is a build script][cargo/3664]
624 * [Find workspace via `workspace_root` link in containing member][cargo/3562]
629 * [Documentation is rendered with mdbook instead of the obsolete, in-tree
631 * [The "Unstable Book" documents nightly-only features][ubook]
632 * [Improve the style of the sidebar in rustdoc output][40265]
633 * [Configure build correctly on 64-bit CPU's with the armhf ABI][40261]
634 * [Fix MSP430 breakage due to `i128`][40257]
635 * [Preliminary Solaris/SPARCv9 support][39903]
636 * [`rustc` is linked statically on Windows MSVC targets][39837], allowing it to
637 run without installing the MSVC runtime.
638 * [`rustdoc --test` includes file names in test names][39788]
639 * This release includes builds of `std` for `sparc64-unknown-linux-gnu`,
640 `aarch64-unknown-linux-fuchsia`, and `x86_64-unknown-linux-fuchsia`.
641 * [Initial support for `aarch64-unknown-freebsd`][39491]
642 * [Initial support for `i686-unknown-netbsd`][39426]
643 * [This release no longer includes the old makefile build system][39431]. Rust
644 is built with a custom build system, written in Rust, and with Cargo.
645 * [Add Debug implementations for libcollection structs][39002]
646 * [`TypeId` implements `PartialOrd` and `Ord`][38981]
647 * [`--test-threads=0` produces an error][38945]
648 * [`rustup` installs documentation by default][40526]
649 * [The Rust source includes NatVis visualizations][39843]. These can be used by
650 WinDbg and Visual Studio to improve the debugging experience.
655 * [Rust 1.17 does not correctly detect the MSVC 2017 linker][38584]. As a
656 workaround, either use MSVC 2015 or run vcvars.bat.
657 * [When coercing to an unsized type lifetimes must be equal][40319]. That is,
658 disallow subtyping between `T` and `U` when `T: Unsize<U>`, e.g. coercing
659 `&mut [&'a X; N]` to `&mut [&'b X]` requires `'a` be equal to `'b`. Soundness
661 * [`format!` and `Display::to_string` panic if an underlying formatting
662 implementation returns an error][40117]. Previously the error was silently
663 ignored. It is incorrect for `write_fmt` to return an error when writing
665 * [In-tree crates are verified to be unstable][39851]. Previously, some minor
666 crates were marked stable and could be accessed from the stable toolchain.
667 * [Rust git source no longer includes vendored crates][39728]. Those that need
668 to build with vendored crates should build from release tarballs.
669 * [Fix inert attributes from `proc_macro_derives`][39572]
670 * [During crate resolution, rustc prefers a crate in the sysroot if two crates
671 are otherwise identical][39518]. Unlikely to be encountered outside the Rust
673 * [Fixed bugs around how type inference interacts with dead-code][39485]. The
674 existing code generally ignores the type of dead-code unless a type-hint is
675 provided; this can cause surprising inference interactions particularly around
676 defaulting. The new code uniformly ignores the result type of dead-code.
677 * [Tuple-struct constructors with private fields are no longer visible][38932]
678 * [Lifetime parameters that do not appear in the arguments are now considered
679 early-bound][38897], resolving a soundness bug (#[32330]). The
680 `hr_lifetime_in_assoc_type` future-compatibility lint has been in effect since
682 * [rustdoc: fix doctests with non-feature crate attributes][38161]
683 * [Make transmuting from fn item types to pointer-sized types a hard
686 [27787]: https://github.com/rust-lang/rust/issues/27787
687 [32330]: https://github.com/rust-lang/rust/issues/32330
688 [34198]: https://github.com/rust-lang/rust/pull/34198
689 [38161]: https://github.com/rust-lang/rust/pull/38161
690 [38368]: https://github.com/rust-lang/rust/pull/38368
691 [38584]: https://github.com/rust-lang/rust/issues/38584
692 [38661]: https://github.com/rust-lang/rust/pull/38661
693 [38764]: https://github.com/rust-lang/rust/pull/38764
694 [38864]: https://github.com/rust-lang/rust/issues/38864
695 [38897]: https://github.com/rust-lang/rust/pull/38897
696 [38921]: https://github.com/rust-lang/rust/pull/38921
697 [38932]: https://github.com/rust-lang/rust/pull/38932
698 [38945]: https://github.com/rust-lang/rust/pull/38945
699 [38981]: https://github.com/rust-lang/rust/pull/38981
700 [39002]: https://github.com/rust-lang/rust/pull/39002
701 [39116]: https://github.com/rust-lang/rust/pull/39116
702 [39193]: https://github.com/rust-lang/rust/pull/39193
703 [39265]: https://github.com/rust-lang/rust/pull/39265
704 [39356]: https://github.com/rust-lang/rust/pull/39356
705 [39372]: https://github.com/rust-lang/rust/pull/39372
706 [39426]: https://github.com/rust-lang/rust/pull/39426
707 [39431]: https://github.com/rust-lang/rust/pull/39431
708 [39438]: https://github.com/rust-lang/rust/pull/39438
709 [39440]: https://github.com/rust-lang/rust/pull/39440
710 [39485]: https://github.com/rust-lang/rust/pull/39485
711 [39491]: https://github.com/rust-lang/rust/pull/39491
712 [39518]: https://github.com/rust-lang/rust/pull/39518
713 [39538]: https://github.com/rust-lang/rust/pull/39538
714 [39572]: https://github.com/rust-lang/rust/pull/39572
715 [39633]: https://github.com/rust-lang/rust/pull/39633
716 [39642]: https://github.com/rust-lang/rust/pull/39642
717 [39728]: https://github.com/rust-lang/rust/pull/39728
718 [39761]: https://github.com/rust-lang/rust/pull/39761
719 [39788]: https://github.com/rust-lang/rust/pull/39788
720 [39793]: https://github.com/rust-lang/rust/pull/39793
721 [39837]: https://github.com/rust-lang/rust/pull/39837
722 [39843]: https://github.com/rust-lang/rust/pull/39843
723 [39851]: https://github.com/rust-lang/rust/pull/39851
724 [39903]: https://github.com/rust-lang/rust/pull/39903
725 [39939]: https://github.com/rust-lang/rust/pull/39939
726 [39953]: https://github.com/rust-lang/rust/pull/39953
727 [39960]: https://github.com/rust-lang/rust/pull/39960
728 [39990]: https://github.com/rust-lang/rust/pull/39990
729 [39995]: https://github.com/rust-lang/rust/pull/39995
730 [40008]: https://github.com/rust-lang/rust/pull/40008
731 [40009]: https://github.com/rust-lang/rust/pull/40009
732 [40027]: https://github.com/rust-lang/rust/pull/40027
733 [40028]: https://github.com/rust-lang/rust/pull/40028
734 [40037]: https://github.com/rust-lang/rust/pull/40037
735 [40117]: https://github.com/rust-lang/rust/pull/40117
736 [40166]: https://github.com/rust-lang/rust/pull/40166
737 [40245]: https://github.com/rust-lang/rust/pull/40245
738 [40257]: https://github.com/rust-lang/rust/pull/40257
739 [40261]: https://github.com/rust-lang/rust/pull/40261
740 [40265]: https://github.com/rust-lang/rust/pull/40265
741 [40319]: https://github.com/rust-lang/rust/pull/40319
742 [40336]: https://github.com/rust-lang/rust/pull/40336
743 [40526]: https://github.com/rust-lang/rust/pull/40526
744 [RFC 1623]: https://github.com/rust-lang/rfcs/blob/master/text/1623-static.md
745 [RFC 1647]: https://github.com/rust-lang/rfcs/blob/master/text/1647-allow-self-in-where-clauses.md
746 [RFC 1651]: https://github.com/rust-lang/rfcs/blob/master/text/1651-movecell.md
747 [RFC 1682]: https://github.com/rust-lang/rfcs/blob/master/text/1682-field-init-shorthand.md
748 [`Arc::from_raw`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.from_raw
749 [`Arc::into_raw`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.into_raw
750 [`Arc::ptr_eq`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.ptr_eq
751 [`BTreeMap::range_mut`]: https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.range_mut
752 [`BTreeMap::range`]: https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.range
753 [`Cell::into_inner`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.into_inner
754 [`Cell::replace`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.replace
755 [`Cell::swap`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.swap
756 [`Cell::take`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.take
757 [`Ordering::then_with`]: https://doc.rust-lang.org/std/cmp/enum.Ordering.html#method.then_with
758 [`Ordering::then`]: https://doc.rust-lang.org/std/cmp/enum.Ordering.html#method.then
759 [`Rc::from_raw`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.from_raw
760 [`Rc::into_raw`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.into_raw
761 [`Rc::ptr_eq`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.ptr_eq
762 [`Result::expect_err`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.expect_err
763 [`collections::Bound`]: https://doc.rust-lang.org/std/collections/enum.Bound.html
764 [`process::abort`]: https://doc.rust-lang.org/std/process/fn.abort.html
765 [`ptr::read_unaligned`]: https://doc.rust-lang.org/std/ptr/fn.read_unaligned.html
766 [`ptr::write_unaligned`]: https://doc.rust-lang.org/std/ptr/fn.write_unaligned.html
767 [cargo/3562]: https://github.com/rust-lang/cargo/pull/3562
768 [cargo/3664]: https://github.com/rust-lang/cargo/pull/3664
769 [cargo/3667]: https://github.com/rust-lang/cargo/pull/3667
770 [cargo/3691]: https://github.com/rust-lang/cargo/pull/3691
771 [cargo/3699]: https://github.com/rust-lang/cargo/pull/3699
772 [cargo/3731]: https://github.com/rust-lang/cargo/pull/3731
773 [mdbook]: https://crates.io/crates/mdbook
774 [ubook]: https://doc.rust-lang.org/unstable-book/
777 Version 1.16.0 (2017-03-16)
778 ===========================
783 * [The compiler's `dead_code` lint now accounts for type aliases][38051].
784 * [Uninhabitable enums (those without any variants) no longer permit wildcard
785 match patterns][38069]
786 * [Clean up semantics of `self` in an import list][38313]
787 * [`Self` may appear in `impl` headers][38920]
788 * [`Self` may appear in struct expressions][39282]
793 * [`rustc` now supports `--emit=metadata`, which causes rustc to emit
794 a `.rmeta` file containing only crate metadata][38571]. This can be
795 used by tools like the Rust Language Service to perform
796 metadata-only builds.
797 * [Levenshtein based typo suggestions now work in most places, while
798 previously they worked only for fields and sometimes for local
799 variables][38927]. Together with the overhaul of "no
800 resolution"/"unexpected resolution" errors (#[38154]) they result in
801 large and systematic improvement in resolution diagnostics.
802 * [Fix `transmute::<T, U>` where `T` requires a bigger alignment than
804 * [rustc: use -Xlinker when specifying an rpath with ',' in it][38798]
805 * [`rustc` no longer attempts to provide "consider using an explicit
806 lifetime" suggestions][37057]. They were inaccurate.
811 * [`VecDeque::truncate`]
812 * [`VecDeque::resize`]
813 * [`String::insert_str`]
814 * [`Duration::checked_add`]
815 * [`Duration::checked_sub`]
816 * [`Duration::checked_div`]
817 * [`Duration::checked_mul`]
820 * [`SocketAddr::is_ipv4`]
821 * [`SocketAddr::is_ipv6`]
822 * [`IpAddr::is_ipv4`]
823 * [`IpAddr::is_ipv6`]
825 * [`Vec::dedup_by_key`]
826 * [`Result::unwrap_or_default`]
827 * [`<*const T>::wrapping_offset`]
828 * [`<*mut T>::wrapping_offset`]
829 * `CommandExt::creation_flags`
830 * [`File::set_permissions`]
831 * [`String::split_off`]
836 * [`[T]::binary_search` and `[T]::binary_search_by_key` now take
837 their argument by `Borrow` parameter][37761]
838 * [All public types in std implement `Debug`][38006]
839 * [`IpAddr` implements `From<Ipv4Addr>` and `From<Ipv6Addr>`][38327]
840 * [`Ipv6Addr` implements `From<[u16; 8]>`][38131]
841 * [Ctrl-Z returns from `Stdin.read()` when reading from the console on
843 * [std: Fix partial writes in `LineWriter`][38062]
844 * [std: Clamp max read/write sizes on Unix][38062]
845 * [Use more specific panic message for `&str` slicing errors][38066]
846 * [`TcpListener::set_only_v6` is deprecated][38304]. This
847 functionality cannot be achieved in std currently.
848 * [`writeln!`, like `println!`, now accepts a form with no string
849 or formatting arguments, to just print a newline][38469]
850 * [Implement `iter::Sum` and `iter::Product` for `Result`][38580]
851 * [Reduce the size of static data in `std_unicode::tables`][38781]
852 * [`char::EscapeDebug`, `EscapeDefault`, `EscapeUnicode`,
853 `CaseMappingIter`, `ToLowercase`, `ToUppercase`, implement
855 * [`Duration` implements `Sum`][38712]
856 * [`String` implements `ToSocketAddrs`][39048]
861 * [The `cargo check` command does a type check of a project without
862 building it][cargo/3296]
863 * [crates.io will display CI badges from Travis and AppVeyor, if
864 specified in Cargo.toml][cargo/3546]
865 * [crates.io will display categories listed in Cargo.toml][cargo/3301]
866 * [Compilation profiles accept integer values for `debug`, in addition
867 to `true` and `false`. These are passed to `rustc` as the value to
868 `-C debuginfo`][cargo/3534]
869 * [Implement `cargo --version --verbose`][cargo/3604]
870 * [All builds now output 'dep-info' build dependencies compatible with
871 make and ninja][cargo/3557]
872 * [Build all workspace members with `build --all`][cargo/3511]
873 * [Document all workspace members with `doc --all`][cargo/3515]
874 * [Path deps outside workspace are not members][cargo/3443]
879 * [`rustdoc` has a `--sysroot` argument that, like `rustc`, specifies
880 the path to the Rust implementation][38589]
881 * [The `armv7-linux-androideabi` target no longer enables NEON
882 extensions, per Google's ABI guide][38413]
883 * [The stock standard library can be compiled for Redox OS][38401]
884 * [Rust has initial SPARC support][38726]. Tier 3. No builds
886 * [Rust has experimental support for Nvidia PTX][38559]. Tier 3. No
888 * [Fix backtraces on i686-pc-windows-gnu by disabling FPO][39379]
893 * [Uninhabitable enums (those without any variants) no longer permit wildcard
894 match patterns][38069]
895 * In this release, references to uninhabited types can not be
896 pattern-matched. This was accidentally allowed in 1.15.
897 * [The compiler's `dead_code` lint now accounts for type aliases][38051].
898 * [Ctrl-Z returns from `Stdin.read()` when reading from the console on
900 * [Clean up semantics of `self` in an import list][38313]
902 [37057]: https://github.com/rust-lang/rust/pull/37057
903 [37761]: https://github.com/rust-lang/rust/pull/37761
904 [38006]: https://github.com/rust-lang/rust/pull/38006
905 [38051]: https://github.com/rust-lang/rust/pull/38051
906 [38062]: https://github.com/rust-lang/rust/pull/38062
907 [38062]: https://github.com/rust-lang/rust/pull/38622
908 [38066]: https://github.com/rust-lang/rust/pull/38066
909 [38069]: https://github.com/rust-lang/rust/pull/38069
910 [38131]: https://github.com/rust-lang/rust/pull/38131
911 [38154]: https://github.com/rust-lang/rust/pull/38154
912 [38274]: https://github.com/rust-lang/rust/pull/38274
913 [38304]: https://github.com/rust-lang/rust/pull/38304
914 [38313]: https://github.com/rust-lang/rust/pull/38313
915 [38314]: https://github.com/rust-lang/rust/pull/38314
916 [38327]: https://github.com/rust-lang/rust/pull/38327
917 [38401]: https://github.com/rust-lang/rust/pull/38401
918 [38413]: https://github.com/rust-lang/rust/pull/38413
919 [38469]: https://github.com/rust-lang/rust/pull/38469
920 [38559]: https://github.com/rust-lang/rust/pull/38559
921 [38571]: https://github.com/rust-lang/rust/pull/38571
922 [38580]: https://github.com/rust-lang/rust/pull/38580
923 [38589]: https://github.com/rust-lang/rust/pull/38589
924 [38670]: https://github.com/rust-lang/rust/pull/38670
925 [38712]: https://github.com/rust-lang/rust/pull/38712
926 [38726]: https://github.com/rust-lang/rust/pull/38726
927 [38781]: https://github.com/rust-lang/rust/pull/38781
928 [38798]: https://github.com/rust-lang/rust/pull/38798
929 [38909]: https://github.com/rust-lang/rust/pull/38909
930 [38920]: https://github.com/rust-lang/rust/pull/38920
931 [38927]: https://github.com/rust-lang/rust/pull/38927
932 [39048]: https://github.com/rust-lang/rust/pull/39048
933 [39282]: https://github.com/rust-lang/rust/pull/39282
934 [39379]: https://github.com/rust-lang/rust/pull/39379
935 [`<*const T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset
936 [`<*mut T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset
937 [`Duration::checked_add`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_add
938 [`Duration::checked_div`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_div
939 [`Duration::checked_mul`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_mul
940 [`Duration::checked_sub`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_sub
941 [`File::set_permissions`]: https://doc.rust-lang.org/std/fs/struct.File.html#method.set_permissions
942 [`IpAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv4
943 [`IpAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv6
944 [`Result::unwrap_or_default`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.unwrap_or_default
945 [`SocketAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv4
946 [`SocketAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv6
947 [`String::insert_str`]: https://doc.rust-lang.org/std/string/struct.String.html#method.insert_str
948 [`String::split_off`]: https://doc.rust-lang.org/std/string/struct.String.html#method.split_off
949 [`Vec::dedup_by_key`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by_key
950 [`Vec::dedup_by`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by
951 [`VecDeque::resize`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.resize
952 [`VecDeque::truncate`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.truncate
953 [`str::repeat`]: https://doc.rust-lang.org/std/primitive.str.html#method.repeat
954 [`str::replacen`]: https://doc.rust-lang.org/std/primitive.str.html#method.replacen
955 [cargo/3296]: https://github.com/rust-lang/cargo/pull/3296
956 [cargo/3301]: https://github.com/rust-lang/cargo/pull/3301
957 [cargo/3443]: https://github.com/rust-lang/cargo/pull/3443
958 [cargo/3511]: https://github.com/rust-lang/cargo/pull/3511
959 [cargo/3515]: https://github.com/rust-lang/cargo/pull/3515
960 [cargo/3534]: https://github.com/rust-lang/cargo/pull/3534
961 [cargo/3546]: https://github.com/rust-lang/cargo/pull/3546
962 [cargo/3557]: https://github.com/rust-lang/cargo/pull/3557
963 [cargo/3604]: https://github.com/rust-lang/cargo/pull/3604
964 [RFC 1623]: https://github.com/rust-lang/rfcs/blob/master/text/1623-static.md
967 Version 1.15.1 (2017-02-09)
968 ===========================
970 * [Fix IntoIter::as_mut_slice's signature][39466]
971 * [Compile compiler builtins with `-fPIC` on 32-bit platforms][39523]
973 [39466]: https://github.com/rust-lang/rust/pull/39466
974 [39523]: https://github.com/rust-lang/rust/pull/39523
977 Version 1.15.0 (2017-02-02)
978 ===========================
983 * Basic procedural macros allowing custom `#[derive]`, aka "macros 1.1", are
984 stable. This allows popular code-generating crates like Serde and Diesel to
985 work ergonomically. [RFC 1681].
986 * [Tuple structs may be empty. Unary and empty tuple structs may be instantiated
987 with curly braces][36868]. Part of [RFC 1506].
988 * [A number of minor changes to name resolution have been activated][37127].
989 They add up to more consistent semantics, allowing for future evolution of
990 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
991 details of what is different. The breaking changes here have been transitioned
992 through the [`legacy_imports`] lint since 1.14, with no known regressions.
993 * [In `macro_rules`, `path` fragments can now be parsed as type parameter
995 * [`?Sized` can be used in `where` clauses][37791]
996 * [There is now a limit on the size of monomorphized types and it can be
997 modified with the `#![type_size_limit]` crate attribute, similarly to
998 the `#![recursion_limit]` attribute][37789]
1003 * [On Windows, the compiler will apply dllimport attributes when linking to
1004 extern functions][37973]. Additional attributes and flags can control which
1005 library kind is linked and its name. [RFC 1717].
1006 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
1007 * [The `--test` flag works with procedural macro crates][38107]
1008 * [Fix `extern "aapcs" fn` ABI][37814]
1009 * [The `-C no-stack-check` flag is deprecated][37636]. It does nothing.
1010 * [The `format!` expander recognizes incorrect `printf` and shell-style
1011 formatting directives and suggests the correct format][37613].
1012 * [Only report one error for all unused imports in an import list][37456]
1014 Compiler Performance
1015 --------------------
1017 * [Avoid unnecessary `mk_ty` calls in `Ty::super_fold_with`][37705]
1018 * [Avoid more unnecessary `mk_ty` calls in `Ty::super_fold_with`][37979]
1019 * [Don't clone in `UnificationTable::probe`][37848]
1020 * [Remove `scope_auxiliary` to cut RSS by 10%][37764]
1021 * [Use small vectors in type walker][37760]
1022 * [Macro expansion performance was improved][37701]
1023 * [Change `HirVec<P<T>>` to `HirVec<T>` in `hir::Expr`][37642]
1024 * [Replace FNV with a faster hash function][37229]
1029 * [`std::iter::Iterator::min_by`]
1030 * [`std::iter::Iterator::max_by`]
1031 * [`std::os::*::fs::FileExt`]
1032 * [`std::sync::atomic::Atomic*::get_mut`]
1033 * [`std::sync::atomic::Atomic*::into_inner`]
1034 * [`std::vec::IntoIter::as_slice`]
1035 * [`std::vec::IntoIter::as_mut_slice`]
1036 * [`std::sync::mpsc::Receiver::try_iter`]
1037 * [`std::os::unix::process::CommandExt::before_exec`]
1038 * [`std::rc::Rc::strong_count`]
1039 * [`std::rc::Rc::weak_count`]
1040 * [`std::sync::Arc::strong_count`]
1041 * [`std::sync::Arc::weak_count`]
1042 * [`std::char::encode_utf8`]
1043 * [`std::char::encode_utf16`]
1044 * [`std::cell::Ref::clone`]
1045 * [`std::io::Take::into_inner`]
1050 * [The standard sorting algorithm has been rewritten for dramatic performance
1051 improvements][38192]. It is a hybrid merge sort, drawing influences from
1052 Timsort. Previously it was a naive merge sort.
1053 * [`Iterator::nth` no longer has a `Sized` bound][38134]
1054 * [`Extend<&T>` is specialized for `Vec` where `T: Copy`][38182] to improve
1056 * [`chars().count()` is much faster][37888] and so are [`chars().last()`
1057 and `char_indices().last()`][37882]
1058 * [Fix ARM Objective-C ABI in `std::env::args`][38146]
1059 * [Chinese characters display correctly in `fmt::Debug`][37855]
1060 * [Derive `Default` for `Duration`][37699]
1061 * [Support creation of anonymous pipes on WinXP/2k][37677]
1062 * [`mpsc::RecvTimeoutError` implements `Error`][37527]
1063 * [Don't pass overlapped handles to processes][38835]
1068 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
1069 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
1070 should instead check the variable at runtime with `std::env`. That the value
1071 was set at build time was a bug, and incorrect when cross-compiling. This
1072 change is known to cause breakage.
1073 * [Add `--all` flag to `cargo test`][cargo/3221]
1074 * [Compile statically against the MSVC CRT][cargo/3363]
1075 * [Mix feature flags into fingerprint/metadata shorthash][cargo/3102]
1076 * [Link OpenSSL statically on OSX][cargo/3311]
1077 * [Apply new fingerprinting to build dir outputs][cargo/3310]
1078 * [Test for bad path overrides with summaries][cargo/3336]
1079 * [Require `cargo install --vers` to take a semver version][cargo/3338]
1080 * [Fix retrying crate downloads for network errors][cargo/3348]
1081 * [Implement string lookup for `build.rustflags` config key][cargo/3356]
1082 * [Emit more info on --message-format=json][cargo/3319]
1083 * [Assume `build.rs` in the same directory as `Cargo.toml` is a build script][cargo/3361]
1084 * [Don't ignore errors in workspace manifest][cargo/3409]
1085 * [Fix `--message-format JSON` when rustc emits non-JSON warnings][cargo/3410]
1090 * [Test runners (binaries built with `--test`) now support a `--list` argument
1091 that lists the tests it contains][38185]
1092 * [Test runners now support a `--exact` argument that makes the test filter
1093 match exactly, instead of matching only a substring of the test name][38181]
1094 * [rustdoc supports a `--playground-url` flag][37763]
1095 * [rustdoc provides more details about `#[should_panic]` errors][37749]
1100 * [The Rust build system is now written in Rust][37817]. The Makefiles may
1101 continue to be used in this release by passing `--disable-rustbuild` to the
1102 configure script, but they will be deleted soon. Note that the new build
1103 system uses a different on-disk layout that will likely affect any scripts
1105 * [Rust supports i686-unknown-openbsd][38086]. Tier 3 support. No testing or
1107 * [Rust supports the MSP430][37627]. Tier 3 support. No testing or releases.
1108 * [Rust supports the ARMv5TE architecture][37615]. Tier 3 support. No testing or
1114 * [A number of minor changes to name resolution have been activated][37127].
1115 They add up to more consistent semantics, allowing for future evolution of
1116 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
1117 details of what is different. The breaking changes here have been transitioned
1118 through the [`legacy_imports`] lint since 1.14, with no known regressions.
1119 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
1120 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
1121 should instead check the variable at runtime with `std::env`. That the value
1122 was set at build time was a bug, and incorrect when cross-compiling. This
1123 change is known to cause breakage.
1124 * [Higher-ranked lifetimes are no longer allowed to appear _only_ in associated
1125 types][33685]. The [`hr_lifetime_in_assoc_type` lint] has been a warning since
1126 1.10 and is now an error by default. It will become a hard error in the near
1128 * [The semantics relating modules to file system directories are changing in
1129 minor ways][37602]. This is captured in the new `legacy_directory_ownership`
1130 lint, which is a warning in this release, and will become a hard error in the
1132 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
1133 * [Once `Peekable` peeks a `None` it will return that `None` without re-querying
1134 the underlying iterator][37834]
1136 ["changes"]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md#changes-to-name-resolution-rules
1137 [33685]: https://github.com/rust-lang/rust/issues/33685
1138 [36868]: https://github.com/rust-lang/rust/pull/36868
1139 [37127]: https://github.com/rust-lang/rust/pull/37127
1140 [37229]: https://github.com/rust-lang/rust/pull/37229
1141 [37456]: https://github.com/rust-lang/rust/pull/37456
1142 [37527]: https://github.com/rust-lang/rust/pull/37527
1143 [37602]: https://github.com/rust-lang/rust/pull/37602
1144 [37613]: https://github.com/rust-lang/rust/pull/37613
1145 [37615]: https://github.com/rust-lang/rust/pull/37615
1146 [37636]: https://github.com/rust-lang/rust/pull/37636
1147 [37627]: https://github.com/rust-lang/rust/pull/37627
1148 [37642]: https://github.com/rust-lang/rust/pull/37642
1149 [37677]: https://github.com/rust-lang/rust/pull/37677
1150 [37699]: https://github.com/rust-lang/rust/pull/37699
1151 [37701]: https://github.com/rust-lang/rust/pull/37701
1152 [37705]: https://github.com/rust-lang/rust/pull/37705
1153 [37749]: https://github.com/rust-lang/rust/pull/37749
1154 [37760]: https://github.com/rust-lang/rust/pull/37760
1155 [37763]: https://github.com/rust-lang/rust/pull/37763
1156 [37764]: https://github.com/rust-lang/rust/pull/37764
1157 [37789]: https://github.com/rust-lang/rust/pull/37789
1158 [37791]: https://github.com/rust-lang/rust/pull/37791
1159 [37814]: https://github.com/rust-lang/rust/pull/37814
1160 [37817]: https://github.com/rust-lang/rust/pull/37817
1161 [37834]: https://github.com/rust-lang/rust/pull/37834
1162 [37848]: https://github.com/rust-lang/rust/pull/37848
1163 [37855]: https://github.com/rust-lang/rust/pull/37855
1164 [37882]: https://github.com/rust-lang/rust/pull/37882
1165 [37888]: https://github.com/rust-lang/rust/pull/37888
1166 [37973]: https://github.com/rust-lang/rust/pull/37973
1167 [37979]: https://github.com/rust-lang/rust/pull/37979
1168 [38086]: https://github.com/rust-lang/rust/pull/38086
1169 [38107]: https://github.com/rust-lang/rust/pull/38107
1170 [38117]: https://github.com/rust-lang/rust/pull/38117
1171 [38134]: https://github.com/rust-lang/rust/pull/38134
1172 [38146]: https://github.com/rust-lang/rust/pull/38146
1173 [38181]: https://github.com/rust-lang/rust/pull/38181
1174 [38182]: https://github.com/rust-lang/rust/pull/38182
1175 [38185]: https://github.com/rust-lang/rust/pull/38185
1176 [38192]: https://github.com/rust-lang/rust/pull/38192
1177 [38279]: https://github.com/rust-lang/rust/pull/38279
1178 [38835]: https://github.com/rust-lang/rust/pull/38835
1179 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
1180 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
1181 [RFC 1560]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md
1182 [RFC 1681]: https://github.com/rust-lang/rfcs/blob/master/text/1681-macros-1.1.md
1183 [RFC 1717]: https://github.com/rust-lang/rfcs/blob/master/text/1717-dllimport.md
1184 [`hr_lifetime_in_assoc_type` lint]: https://github.com/rust-lang/rust/issues/33685
1185 [`legacy_imports`]: https://github.com/rust-lang/rust/pull/38271
1186 [cargo/3102]: https://github.com/rust-lang/cargo/pull/3102
1187 [cargo/3221]: https://github.com/rust-lang/cargo/pull/3221
1188 [cargo/3310]: https://github.com/rust-lang/cargo/pull/3310
1189 [cargo/3311]: https://github.com/rust-lang/cargo/pull/3311
1190 [cargo/3319]: https://github.com/rust-lang/cargo/pull/3319
1191 [cargo/3336]: https://github.com/rust-lang/cargo/pull/3336
1192 [cargo/3338]: https://github.com/rust-lang/cargo/pull/3338
1193 [cargo/3348]: https://github.com/rust-lang/cargo/pull/3348
1194 [cargo/3356]: https://github.com/rust-lang/cargo/pull/3356
1195 [cargo/3361]: https://github.com/rust-lang/cargo/pull/3361
1196 [cargo/3363]: https://github.com/rust-lang/cargo/pull/3363
1197 [cargo/3368]: https://github.com/rust-lang/cargo/issues/3368
1198 [cargo/3409]: https://github.com/rust-lang/cargo/pull/3409
1199 [cargo/3410]: https://github.com/rust-lang/cargo/pull/3410
1200 [`std::iter::Iterator::min_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.min_by
1201 [`std::iter::Iterator::max_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.max_by
1202 [`std::os::*::fs::FileExt`]: https://doc.rust-lang.org/std/os/unix/fs/trait.FileExt.html
1203 [`std::sync::atomic::Atomic*::get_mut`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.get_mut
1204 [`std::sync::atomic::Atomic*::into_inner`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.into_inner
1205 [`std::vec::IntoIter::as_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_slice
1206 [`std::vec::IntoIter::as_mut_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_mut_slice
1207 [`std::sync::mpsc::Receiver::try_iter`]: https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.try_iter
1208 [`std::os::unix::process::CommandExt::before_exec`]: https://doc.rust-lang.org/std/os/unix/process/trait.CommandExt.html#tymethod.before_exec
1209 [`std::rc::Rc::strong_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.strong_count
1210 [`std::rc::Rc::weak_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.weak_count
1211 [`std::sync::Arc::strong_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.strong_count
1212 [`std::sync::Arc::weak_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.weak_count
1213 [`std::char::encode_utf8`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf8
1214 [`std::char::encode_utf16`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf16
1215 [`std::cell::Ref::clone`]: https://doc.rust-lang.org/std/cell/struct.Ref.html#method.clone
1216 [`std::io::Take::into_inner`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.into_inner
1219 Version 1.14.0 (2016-12-22)
1220 ===========================
1225 * [`..` matches multiple tuple fields in enum variants, structs
1226 and tuples][36843]. [RFC 1492].
1227 * [Safe `fn` items can be coerced to `unsafe fn` pointers][37389]
1228 * [`use *` and `use ::*` both glob-import from the crate root][37367]
1229 * [It's now possible to call a `Vec<Box<Fn()>>` without explicit
1230 dereferencing][36822]
1235 * [Mark enums with non-zero discriminant as non-zero][37224]
1236 * [Lower-case `static mut` names are linted like other
1237 statics and consts][37162]
1238 * [Fix ICE on some macros in const integer positions
1239 (e.g. `[u8; m!()]`)][36819]
1240 * [Improve error message and snippet for "did you mean `x`"][36798]
1241 * [Add a panic-strategy field to the target specification][36794]
1242 * [Include LLVM version in `--version --verbose`][37200]
1244 Compile-time Optimizations
1245 --------------------------
1247 * [Improve macro expansion performance][37569]
1248 * [Shrink `Expr_::ExprInlineAsm`][37445]
1249 * [Replace all uses of SHA-256 with BLAKE2b][37439]
1250 * [Reduce the number of bytes hashed by `IchHasher`][37427]
1251 * [Avoid more allocations when compiling html5ever][37373]
1252 * [Use `SmallVector` in `CombineFields::instantiate`][37322]
1253 * [Avoid some allocations in the macro parser][37318]
1254 * [Use a faster deflate setting][37298]
1255 * [Add `ArrayVec` and `AccumulateVec` to reduce heap allocations
1256 during interning of slices][37270]
1257 * [Optimize `write_metadata`][37267]
1258 * [Don't process obligation forest cycles when stalled][37231]
1259 * [Avoid many `CrateConfig` clones][37161]
1260 * [Optimize `Substs::super_fold_with`][37108]
1261 * [Optimize `ObligationForest`'s `NodeState` handling][36993]
1262 * [Speed up `plug_leaks`][36917]
1267 * [`println!()`, with no arguments, prints newline][36825].
1268 Previously, an empty string was required to achieve the same.
1269 * [`Wrapping` impls standard binary and unary operators, as well as
1270 the `Sum` and `Product` iterators][37356]
1271 * [Implement `From<Cow<str>> for String` and `From<Cow<[T]>> for
1273 * [Improve `fold` performance for `chain`, `cloned`, `map`, and
1274 `VecDeque` iterators][37315]
1275 * [Improve `SipHasher` performance on small values][37312]
1276 * [Add Iterator trait TrustedLen to enable better FromIterator /
1278 * [Expand `.zip()` specialization to `.map()` and `.cloned()`][37230]
1279 * [`ReadDir` implements `Debug`][37221]
1280 * [Implement `RefUnwindSafe` for atomic types][37178]
1281 * [Specialize `Vec::extend` to `Vec::extend_from_slice`][37094]
1282 * [Avoid allocations in `Decoder::read_str`][37064]
1283 * [`io::Error` implements `From<io::ErrorKind>`][37037]
1284 * [Impl `Debug` for raw pointers to unsized data][36880]
1285 * [Don't reuse `HashMap` random seeds][37470]
1286 * [The internal memory layout of `HashMap` is more cache-friendly, for
1287 significant improvements in some operations][36692]
1288 * [`HashMap` uses less memory on 32-bit architectures][36595]
1289 * [Impl `Add<{str, Cow<str>}>` for `Cow<str>`][36430]
1294 * [Expose rustc cfg values to build scripts][cargo/3243]
1295 * [Allow cargo to work with read-only `CARGO_HOME`][cargo/3259]
1296 * [Fix passing --features when testing multiple packages][cargo/3280]
1297 * [Use a single profile set per workspace][cargo/3249]
1298 * [Load `replace` sections from lock files][cargo/3220]
1299 * [Ignore `panic` configuration for test/bench profiles][cargo/3175]
1304 * [rustup is the recommended Rust installation method][1.14rustup]
1305 * This release includes host (rustc) builds for Linux on MIPS, PowerPC, and
1306 S390x. These are [tier 2] platforms and may have major defects. Follow the
1307 instructions on the website to install, or add the targets to an existing
1308 installation with `rustup target add`. The new target triples are:
1309 - `mips-unknown-linux-gnu`
1310 - `mipsel-unknown-linux-gnu`
1311 - `mips64-unknown-linux-gnuabi64`
1312 - `mips64el-unknown-linux-gnuabi64 `
1313 - `powerpc-unknown-linux-gnu`
1314 - `powerpc64-unknown-linux-gnu`
1315 - `powerpc64le-unknown-linux-gnu`
1316 - `s390x-unknown-linux-gnu `
1317 * This release includes target (std) builds for ARM Linux running MUSL
1318 libc. These are [tier 2] platforms and may have major defects. Add the
1319 following triples to an existing rustup installation with `rustup target add`:
1320 - `arm-unknown-linux-musleabi`
1321 - `arm-unknown-linux-musleabihf`
1322 - `armv7-unknown-linux-musleabihf`
1323 * This release includes [experimental support for WebAssembly][1.14wasm], via
1324 the `wasm32-unknown-emscripten` target. This target is known to have major
1325 defects. Please test, report, and fix.
1326 * rustup no longer installs documentation by default. Run `rustup
1327 component add rust-docs` to install.
1328 * [Fix line stepping in debugger][37310]
1329 * [Enable line number debuginfo in releases][37280]
1334 * [Disable jemalloc on aarch64/powerpc/mips][37392]
1335 * [Add support for Fuchsia OS][37313]
1336 * [Detect local-rebuild by only MAJOR.MINOR version][37273]
1341 * [A number of forward-compatibility lints used by the compiler
1342 to gradually introduce language changes have been converted
1343 to deny by default][36894]:
1344 - ["use of inaccessible extern crate erroneously allowed"][36886]
1345 - ["type parameter default erroneously allowed in invalid location"][36887]
1346 - ["detects super or self keywords at the beginning of global path"][36888]
1347 - ["two overlapping inherent impls define an item with the same name
1348 were erroneously allowed"][36889]
1349 - ["floating-point constants cannot be used in patterns"][36890]
1350 - ["constants of struct or enum type can only be used in a pattern if
1351 the struct or enum has `#[derive(PartialEq, Eq)]`"][36891]
1352 - ["lifetimes or labels named `'_` were erroneously allowed"][36892]
1353 * [Prohibit patterns in trait methods without bodies][37378]
1354 * [The atomic `Ordering` enum may not be matched exhaustively][37351]
1355 * [Future-proofing `#[no_link]` breaks some obscure cases][37247]
1356 * [The `$crate` macro variable is accepted in fewer locations][37213]
1357 * [Impls specifying extra region requirements beyond the trait
1358 they implement are rejected][37167]
1359 * [Enums may not be unsized][37111]. Unsized enums are intended to
1360 work but never have. For now they are forbidden.
1361 * [Enforce the shadowing restrictions from RFC 1560 for today's macros][36767]
1363 [tier 2]: https://forge.rust-lang.org/platform-support.html
1364 [1.14rustup]: https://internals.rust-lang.org/t/beta-testing-rustup-rs/3316/204
1365 [1.14wasm]: https://users.rust-lang.org/t/compiling-to-the-web-with-rust-and-emscripten/7627
1366 [36430]: https://github.com/rust-lang/rust/pull/36430
1367 [36595]: https://github.com/rust-lang/rust/pull/36595
1368 [36595]: https://github.com/rust-lang/rust/pull/36595
1369 [36692]: https://github.com/rust-lang/rust/pull/36692
1370 [36767]: https://github.com/rust-lang/rust/pull/36767
1371 [36794]: https://github.com/rust-lang/rust/pull/36794
1372 [36798]: https://github.com/rust-lang/rust/pull/36798
1373 [36819]: https://github.com/rust-lang/rust/pull/36819
1374 [36822]: https://github.com/rust-lang/rust/pull/36822
1375 [36825]: https://github.com/rust-lang/rust/pull/36825
1376 [36843]: https://github.com/rust-lang/rust/pull/36843
1377 [36880]: https://github.com/rust-lang/rust/pull/36880
1378 [36886]: https://github.com/rust-lang/rust/issues/36886
1379 [36887]: https://github.com/rust-lang/rust/issues/36887
1380 [36888]: https://github.com/rust-lang/rust/issues/36888
1381 [36889]: https://github.com/rust-lang/rust/issues/36889
1382 [36890]: https://github.com/rust-lang/rust/issues/36890
1383 [36891]: https://github.com/rust-lang/rust/issues/36891
1384 [36892]: https://github.com/rust-lang/rust/issues/36892
1385 [36894]: https://github.com/rust-lang/rust/pull/36894
1386 [36917]: https://github.com/rust-lang/rust/pull/36917
1387 [36993]: https://github.com/rust-lang/rust/pull/36993
1388 [37037]: https://github.com/rust-lang/rust/pull/37037
1389 [37064]: https://github.com/rust-lang/rust/pull/37064
1390 [37094]: https://github.com/rust-lang/rust/pull/37094
1391 [37108]: https://github.com/rust-lang/rust/pull/37108
1392 [37111]: https://github.com/rust-lang/rust/pull/37111
1393 [37161]: https://github.com/rust-lang/rust/pull/37161
1394 [37162]: https://github.com/rust-lang/rust/pull/37162
1395 [37167]: https://github.com/rust-lang/rust/pull/37167
1396 [37178]: https://github.com/rust-lang/rust/pull/37178
1397 [37200]: https://github.com/rust-lang/rust/pull/37200
1398 [37213]: https://github.com/rust-lang/rust/pull/37213
1399 [37221]: https://github.com/rust-lang/rust/pull/37221
1400 [37224]: https://github.com/rust-lang/rust/pull/37224
1401 [37230]: https://github.com/rust-lang/rust/pull/37230
1402 [37231]: https://github.com/rust-lang/rust/pull/37231
1403 [37247]: https://github.com/rust-lang/rust/pull/37247
1404 [37267]: https://github.com/rust-lang/rust/pull/37267
1405 [37270]: https://github.com/rust-lang/rust/pull/37270
1406 [37273]: https://github.com/rust-lang/rust/pull/37273
1407 [37280]: https://github.com/rust-lang/rust/pull/37280
1408 [37298]: https://github.com/rust-lang/rust/pull/37298
1409 [37306]: https://github.com/rust-lang/rust/pull/37306
1410 [37310]: https://github.com/rust-lang/rust/pull/37310
1411 [37312]: https://github.com/rust-lang/rust/pull/37312
1412 [37313]: https://github.com/rust-lang/rust/pull/37313
1413 [37315]: https://github.com/rust-lang/rust/pull/37315
1414 [37318]: https://github.com/rust-lang/rust/pull/37318
1415 [37322]: https://github.com/rust-lang/rust/pull/37322
1416 [37326]: https://github.com/rust-lang/rust/pull/37326
1417 [37351]: https://github.com/rust-lang/rust/pull/37351
1418 [37356]: https://github.com/rust-lang/rust/pull/37356
1419 [37367]: https://github.com/rust-lang/rust/pull/37367
1420 [37373]: https://github.com/rust-lang/rust/pull/37373
1421 [37378]: https://github.com/rust-lang/rust/pull/37378
1422 [37389]: https://github.com/rust-lang/rust/pull/37389
1423 [37392]: https://github.com/rust-lang/rust/pull/37392
1424 [37427]: https://github.com/rust-lang/rust/pull/37427
1425 [37439]: https://github.com/rust-lang/rust/pull/37439
1426 [37445]: https://github.com/rust-lang/rust/pull/37445
1427 [37470]: https://github.com/rust-lang/rust/pull/37470
1428 [37569]: https://github.com/rust-lang/rust/pull/37569
1429 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
1430 [cargo/3175]: https://github.com/rust-lang/cargo/pull/3175
1431 [cargo/3220]: https://github.com/rust-lang/cargo/pull/3220
1432 [cargo/3243]: https://github.com/rust-lang/cargo/pull/3243
1433 [cargo/3249]: https://github.com/rust-lang/cargo/pull/3249
1434 [cargo/3259]: https://github.com/rust-lang/cargo/pull/3259
1435 [cargo/3280]: https://github.com/rust-lang/cargo/pull/3280
1438 Version 1.13.0 (2016-11-10)
1439 ===========================
1444 * [Stabilize the `?` operator][36995]. `?` is a simple way to propagate
1445 errors, like the `try!` macro, described in [RFC 0243].
1446 * [Stabilize macros in type position][36014]. Described in [RFC 873].
1447 * [Stabilize attributes on statements][36995]. Described in [RFC 0016].
1448 * [Fix `#[derive]` for empty tuple structs/variants][35728]
1449 * [Fix lifetime rules for 'if' conditions][36029]
1450 * [Avoid loading and parsing unconfigured non-inline modules][36482]
1455 * [Add the `-C link-arg` argument][36574]
1456 * [Remove the old AST-based backend from rustc_trans][35764]
1457 * [Don't enable NEON by default on armv7 Linux][35814]
1458 * [Fix debug line number info for macro expansions][35238]
1459 * [Do not emit "class method" debuginfo for types that are not
1460 DICompositeType][36008]
1461 * [Warn about multiple conflicting #[repr] hints][34623]
1462 * [When sizing DST, don't double-count nested struct prefixes][36351]
1463 * [Default RUST_MIN_STACK to 16MiB for now][36505]
1464 * [Improve rlib metadata format][36551]. Reduces rlib size significantly.
1465 * [Reject macros with empty repetitions to avoid infinite loop][36721]
1466 * [Expand macros without recursing to avoid stack overflows][36214]
1471 * [Replace macro backtraces with labeled local uses][35702]
1472 * [Improve error message for missplaced doc comments][33922]
1473 * [Buffer unix and lock windows to prevent message interleaving][35975]
1474 * [Update lifetime errors to specifically note temporaries][36171]
1475 * [Special case a few colors for Windows][36178]
1476 * [Suggest `use self` when such an import resolves][36289]
1477 * [Be more specific when type parameter shadows primitive type][36338]
1478 * Many minor improvements
1480 Compile-time Optimizations
1481 --------------------------
1483 * [Compute and cache HIR hashes at beginning][35854]
1484 * [Don't hash types in loan paths][36004]
1485 * [Cache projections in trans][35761]
1486 * [Optimize the parser's last token handling][36527]
1487 * [Only instantiate #[inline] functions in codegen units referencing
1488 them][36524]. This leads to big improvements in cases where crates export
1489 define many inline functions without using them directly.
1490 * [Lazily allocate TypedArena's first chunk][36592]
1491 * [Don't allocate during default HashSet creation][36734]
1498 * [`overflowing_abs`]
1499 * [`RefCell::try_borrow`]
1500 * [`RefCell::try_borrow_mut`]
1505 * [Add `assert_ne!` and `debug_assert_ne!`][35074]
1506 * [Make `vec_deque::Drain`, `hash_map::Drain`, and `hash_set::Drain`
1508 * [Implement `AsRef<[T]>` for `std::slice::Iter`][35559]
1509 * [Implement `Debug` for `std::vec::IntoIter`][35707]
1510 * [`CString`: avoid excessive growth just to 0-terminate][35871]
1511 * [Implement `CoerceUnsized` for `{Cell, RefCell, UnsafeCell}`][35627]
1512 * [Use arc4rand on FreeBSD][35884]
1513 * [memrchr: Correct aligned offset computation][35969]
1514 * [Improve Demangling of Rust Symbols][36059]
1515 * [Use monotonic time in condition variables][35048]
1516 * [Implement `Debug` for `std::path::{Components,Iter}`][36101]
1517 * [Implement conversion traits for `char`][35755]
1518 * [Fix illegal instruction caused by overflow in channel cloning][36104]
1519 * [Zero first byte of CString on drop][36264]
1520 * [Inherit overflow checks for sum and product][36372]
1521 * [Add missing Eq implementations][36423]
1522 * [Implement `Debug` for `DirEntry`][36631]
1523 * [When `getaddrinfo` returns `EAI_SYSTEM` retrieve actual error from
1525 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
1526 * [Implement more traits for `std::io::ErrorKind`][35911]
1527 * [Optimize BinaryHeap bounds checking][36072]
1528 * [Work around pointer aliasing issue in `Vec::extend_from_slice`,
1529 `extend_with_element`][36355]
1530 * [Fix overflow checking in unsigned pow()][34942]
1535 * This release includes security fixes to both curl and OpenSSL.
1536 * [Fix transitive doctests when panic=abort][cargo/3021]
1537 * [Add --all-features flag to cargo][cargo/3038]
1538 * [Reject path-based dependencies in `cargo package`][cargo/3060]
1539 * [Don't parse the home directory more than once][cargo/3078]
1540 * [Don't try to generate Cargo.lock on empty workspaces][cargo/3092]
1541 * [Update OpenSSL to 1.0.2j][cargo/3121]
1542 * [Add license and license_file to cargo metadata output][cargo/3110]
1543 * [Make crates-io registry URL optional in config; ignore all changes to
1544 source.crates-io][cargo/3089]
1545 * [Don't download dependencies from other platforms][cargo/3123]
1546 * [Build transitive dev-dependencies when needed][cargo/3125]
1547 * [Add support for per-target rustflags in .cargo/config][cargo/3157]
1548 * [Avoid updating registry when adding existing deps][cargo/3144]
1549 * [Warn about path overrides that won't work][cargo/3136]
1550 * [Use workspaces during `cargo install`][cargo/3146]
1551 * [Leak mspdbsrv.exe processes on Windows][cargo/3162]
1552 * [Add --message-format flag][cargo/3000]
1553 * [Pass target environment for rustdoc][cargo/3205]
1554 * [Use `CommandExt::exec` for `cargo run` on Unix][cargo/2818]
1555 * [Update curl and curl-sys][cargo/3241]
1556 * [Call rustdoc test with the correct cfg flags of a package][cargo/3242]
1561 * [rustdoc: Add the `--sysroot` argument][36586]
1562 * [rustdoc: Fix a couple of issues with the search results][35655]
1563 * [rustdoc: remove the `!` from macro URLs and titles][35234]
1564 * [gdb: Fix pretty-printing special-cased Rust types][35585]
1565 * [rustdoc: Filter more incorrect methods inherited through Deref][36266]
1570 * [Remove unmaintained style guide][35124]
1571 * [Add s390x support][36369]
1572 * [Initial work at Haiku OS support][36727]
1573 * [Add mips-uclibc targets][35734]
1574 * [Crate-ify compiler-rt into compiler-builtins][35021]
1575 * [Add rustc version info (git hash + date) to dist tarball][36213]
1576 * Many documentation improvements
1581 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
1582 * [Deny (by default) transmuting from fn item types to pointer-sized
1583 types][34923]. Continuing the long transition to zero-sized fn items,
1585 * [Fix `#[derive]` for empty tuple structs/variants][35728].
1587 * [Issue deprecation warnings for safe accesses to extern statics][36173]
1588 * [Fix lifetime rules for 'if' conditions][36029].
1589 * [Inherit overflow checks for sum and product][36372].
1590 * [Forbid user-defined macros named "macro_rules"][36730].
1592 [33922]: https://github.com/rust-lang/rust/pull/33922
1593 [34623]: https://github.com/rust-lang/rust/pull/34623
1594 [34923]: https://github.com/rust-lang/rust/pull/34923
1595 [34942]: https://github.com/rust-lang/rust/pull/34942
1596 [34982]: https://github.com/rust-lang/rust/pull/34982
1597 [35021]: https://github.com/rust-lang/rust/pull/35021
1598 [35048]: https://github.com/rust-lang/rust/pull/35048
1599 [35074]: https://github.com/rust-lang/rust/pull/35074
1600 [35124]: https://github.com/rust-lang/rust/pull/35124
1601 [35234]: https://github.com/rust-lang/rust/pull/35234
1602 [35238]: https://github.com/rust-lang/rust/pull/35238
1603 [35354]: https://github.com/rust-lang/rust/pull/35354
1604 [35559]: https://github.com/rust-lang/rust/pull/35559
1605 [35585]: https://github.com/rust-lang/rust/pull/35585
1606 [35627]: https://github.com/rust-lang/rust/pull/35627
1607 [35655]: https://github.com/rust-lang/rust/pull/35655
1608 [35702]: https://github.com/rust-lang/rust/pull/35702
1609 [35707]: https://github.com/rust-lang/rust/pull/35707
1610 [35728]: https://github.com/rust-lang/rust/pull/35728
1611 [35734]: https://github.com/rust-lang/rust/pull/35734
1612 [35755]: https://github.com/rust-lang/rust/pull/35755
1613 [35761]: https://github.com/rust-lang/rust/pull/35761
1614 [35764]: https://github.com/rust-lang/rust/pull/35764
1615 [35814]: https://github.com/rust-lang/rust/pull/35814
1616 [35854]: https://github.com/rust-lang/rust/pull/35854
1617 [35871]: https://github.com/rust-lang/rust/pull/35871
1618 [35884]: https://github.com/rust-lang/rust/pull/35884
1619 [35911]: https://github.com/rust-lang/rust/pull/35911
1620 [35969]: https://github.com/rust-lang/rust/pull/35969
1621 [35975]: https://github.com/rust-lang/rust/pull/35975
1622 [36004]: https://github.com/rust-lang/rust/pull/36004
1623 [36008]: https://github.com/rust-lang/rust/pull/36008
1624 [36014]: https://github.com/rust-lang/rust/pull/36014
1625 [36029]: https://github.com/rust-lang/rust/pull/36029
1626 [36059]: https://github.com/rust-lang/rust/pull/36059
1627 [36072]: https://github.com/rust-lang/rust/pull/36072
1628 [36101]: https://github.com/rust-lang/rust/pull/36101
1629 [36104]: https://github.com/rust-lang/rust/pull/36104
1630 [36171]: https://github.com/rust-lang/rust/pull/36171
1631 [36173]: https://github.com/rust-lang/rust/pull/36173
1632 [36178]: https://github.com/rust-lang/rust/pull/36178
1633 [36213]: https://github.com/rust-lang/rust/pull/36213
1634 [36214]: https://github.com/rust-lang/rust/pull/36214
1635 [36264]: https://github.com/rust-lang/rust/pull/36264
1636 [36266]: https://github.com/rust-lang/rust/pull/36266
1637 [36289]: https://github.com/rust-lang/rust/pull/36289
1638 [36338]: https://github.com/rust-lang/rust/pull/36338
1639 [36351]: https://github.com/rust-lang/rust/pull/36351
1640 [36355]: https://github.com/rust-lang/rust/pull/36355
1641 [36369]: https://github.com/rust-lang/rust/pull/36369
1642 [36372]: https://github.com/rust-lang/rust/pull/36372
1643 [36423]: https://github.com/rust-lang/rust/pull/36423
1644 [36482]: https://github.com/rust-lang/rust/pull/36482
1645 [36505]: https://github.com/rust-lang/rust/pull/36505
1646 [36524]: https://github.com/rust-lang/rust/pull/36524
1647 [36527]: https://github.com/rust-lang/rust/pull/36527
1648 [36551]: https://github.com/rust-lang/rust/pull/36551
1649 [36574]: https://github.com/rust-lang/rust/pull/36574
1650 [36586]: https://github.com/rust-lang/rust/pull/36586
1651 [36592]: https://github.com/rust-lang/rust/pull/36592
1652 [36631]: https://github.com/rust-lang/rust/pull/36631
1653 [36639]: https://github.com/rust-lang/rust/pull/36639
1654 [36721]: https://github.com/rust-lang/rust/pull/36721
1655 [36727]: https://github.com/rust-lang/rust/pull/36727
1656 [36730]: https://github.com/rust-lang/rust/pull/36730
1657 [36734]: https://github.com/rust-lang/rust/pull/36734
1658 [36754]: https://github.com/rust-lang/rust/pull/36754
1659 [36995]: https://github.com/rust-lang/rust/pull/36995
1660 [RFC 0016]: https://github.com/rust-lang/rfcs/blob/master/text/0016-more-attributes.md
1661 [RFC 0243]: https://github.com/rust-lang/rfcs/blob/master/text/0243-trait-based-exception-handling.md
1662 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
1663 [RFC 401]: https://github.com/rust-lang/rfcs/blob/master/text/0401-coercions.md
1664 [RFC 873]: https://github.com/rust-lang/rfcs/blob/master/text/0873-type-macros.md
1665 [cargo/2818]: https://github.com/rust-lang/cargo/pull/2818
1666 [cargo/3000]: https://github.com/rust-lang/cargo/pull/3000
1667 [cargo/3021]: https://github.com/rust-lang/cargo/pull/3021
1668 [cargo/3038]: https://github.com/rust-lang/cargo/pull/3038
1669 [cargo/3060]: https://github.com/rust-lang/cargo/pull/3060
1670 [cargo/3078]: https://github.com/rust-lang/cargo/pull/3078
1671 [cargo/3089]: https://github.com/rust-lang/cargo/pull/3089
1672 [cargo/3092]: https://github.com/rust-lang/cargo/pull/3092
1673 [cargo/3110]: https://github.com/rust-lang/cargo/pull/3110
1674 [cargo/3121]: https://github.com/rust-lang/cargo/pull/3121
1675 [cargo/3123]: https://github.com/rust-lang/cargo/pull/3123
1676 [cargo/3125]: https://github.com/rust-lang/cargo/pull/3125
1677 [cargo/3136]: https://github.com/rust-lang/cargo/pull/3136
1678 [cargo/3144]: https://github.com/rust-lang/cargo/pull/3144
1679 [cargo/3146]: https://github.com/rust-lang/cargo/pull/3146
1680 [cargo/3157]: https://github.com/rust-lang/cargo/pull/3157
1681 [cargo/3162]: https://github.com/rust-lang/cargo/pull/3162
1682 [cargo/3205]: https://github.com/rust-lang/cargo/pull/3205
1683 [cargo/3241]: https://github.com/rust-lang/cargo/pull/3241
1684 [cargo/3242]: https://github.com/rust-lang/cargo/pull/3242
1685 [rustup]: https://www.rustup.rs
1686 [`checked_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.checked_abs
1687 [`wrapping_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.wrapping_abs
1688 [`overflowing_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.overflowing_abs
1689 [`RefCell::try_borrow`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow
1690 [`RefCell::try_borrow_mut`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow_mut
1691 [`SipHasher`]: https://doc.rust-lang.org/std/hash/struct.SipHasher.html
1692 [`DefaultHasher`]: https://doc.rust-lang.org/std/collections/hash_map/struct.DefaultHasher.html
1695 Version 1.12.1 (2016-10-20)
1696 ===========================
1701 * [ICE: 'rustc' panicked at 'assertion failed: concrete_substs.is_normalized_for_trans()' #36381][36381]
1702 * [Confusion with double negation and booleans][36856]
1703 * [rustc 1.12.0 fails with SIGSEGV in release mode (syn crate 0.8.0)][36875]
1704 * [Rustc 1.12.0 Windows build of `ethcore` crate fails with LLVM error][36924]
1705 * [1.12.0: High memory usage when linking in release mode with debug info][36926]
1706 * [Corrupted memory after updated to 1.12][36936]
1707 * ["Let NullaryConstructor = something;" causes internal compiler error: "tried to overwrite interned AdtDef"][37026]
1708 * [Fix ICE: inject bitcast if types mismatch for invokes/calls/stores][37112]
1709 * [debuginfo: Handle spread_arg case in MIR-trans in a more stable way.][37153]
1711 [36381]: https://github.com/rust-lang/rust/issues/36381
1712 [36856]: https://github.com/rust-lang/rust/issues/36856
1713 [36875]: https://github.com/rust-lang/rust/issues/36875
1714 [36924]: https://github.com/rust-lang/rust/issues/36924
1715 [36926]: https://github.com/rust-lang/rust/issues/36926
1716 [36936]: https://github.com/rust-lang/rust/issues/36936
1717 [37026]: https://github.com/rust-lang/rust/issues/37026
1718 [37112]: https://github.com/rust-lang/rust/issues/37112
1719 [37153]: https://github.com/rust-lang/rust/issues/37153
1722 Version 1.12.0 (2016-09-29)
1723 ===========================
1728 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)](https://github.com/rust-lang/rust/pull/34096).
1729 This translation pass is far simpler than the previous AST->LLVM pass, and
1730 creates opportunities to perform new optimizations directly on the MIR. It
1731 was previously described [on the Rust blog](https://blog.rust-lang.org/2016/04/19/MIR.html).
1732 * [`rustc` presents a new, more readable error format, along with
1733 machine-readable JSON error output for use by IDEs](https://github.com/rust-lang/rust/pull/35401).
1734 Most common editors supporting Rust have been updated to work with it. It was
1735 previously described [on the Rust blog](https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
1740 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)](https://github.com/rust-lang/rust/pull/34096).
1741 This translation pass is far simpler than the previous AST->LLVM pass, and
1742 creates opportunities to perform new optimizations directly on the MIR. It
1743 was previously described [on the Rust blog](https://blog.rust-lang.org/2016/04/19/MIR.html).
1744 * [Print the Rust target name, not the LLVM target name, with
1745 `--print target-list`](https://github.com/rust-lang/rust/pull/35489)
1746 * [The computation of `TypeId` is correct in some cases where it was previously
1747 producing inconsistent results](https://github.com/rust-lang/rust/pull/35267)
1748 * [The `mips-unknown-linux-gnu` target uses hardware floating point by default](https://github.com/rust-lang/rust/pull/34910)
1749 * [The `rustc` arguments, `--print target-cpus`, `--print target-features`,
1750 `--print relocation-models`, and `--print code-models` print the available
1751 options to the `-C target-cpu`, `-C target-feature`, `-C relocation-model` and
1752 `-C code-model` code generation arguments](https://github.com/rust-lang/rust/pull/34845)
1753 * [`rustc` supports three new MUSL targets on ARM: `arm-unknown-linux-musleabi`,
1754 `arm-unknown-linux-musleabihf`, and `armv7-unknown-linux-musleabihf`](https://github.com/rust-lang/rust/pull/35060).
1755 These targets produce statically-linked binaries. There are no binary release
1761 * [`rustc` presents a new, more readable error format, along with
1762 machine-readable JSON error output for use by IDEs](https://github.com/rust-lang/rust/pull/35401).
1763 Most common editors supporting Rust have been updated to work with it. It was
1764 previously described [on the Rust blog](https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
1765 * [In error descriptions, references are now described in plain English,
1766 instead of as "&-ptr"](https://github.com/rust-lang/rust/pull/35611)
1767 * [In error type descriptions, unknown numeric types are named `{integer}` or
1768 `{float}` instead of `_`](https://github.com/rust-lang/rust/pull/35080)
1769 * [`rustc` emits a clearer error when inner attributes follow a doc comment](https://github.com/rust-lang/rust/pull/34676)
1774 * [`macro_rules!` invocations can be made within `macro_rules!` invocations](https://github.com/rust-lang/rust/pull/34925)
1775 * [`macro_rules!` meta-variables are hygienic](https://github.com/rust-lang/rust/pull/35453)
1776 * [`macro_rules!` `tt` matchers can be reparsed correctly, making them much more
1777 useful](https://github.com/rust-lang/rust/pull/34908)
1778 * [`macro_rules!` `stmt` matchers correctly consume the entire contents when
1779 inside non-braces invocations](https://github.com/rust-lang/rust/pull/34886)
1780 * [Semicolons are properly required as statement delimeters inside
1781 `macro_rules!` invocations](https://github.com/rust-lang/rust/pull/34660)
1782 * [`cfg_attr` works on `path` attributes](https://github.com/rust-lang/rust/pull/34546)
1787 * [`Cell::as_ptr`](https://doc.rust-lang.org/std/cell/struct.Cell.html#method.as_ptr)
1788 * [`RefCell::as_ptr`](https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.as_ptr)
1789 * [`IpAddr::is_unspecified`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_unspecified)
1790 * [`IpAddr::is_loopback`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_loopback)
1791 * [`IpAddr::is_multicast`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_multicast)
1792 * [`Ipv4Addr::is_unspecified`](https://doc.rust-lang.org/std/net/struct.Ipv4Addr.html#method.is_unspecified)
1793 * [`Ipv6Addr::octets`](https://doc.rust-lang.org/std/net/struct.Ipv6Addr.html#method.octets)
1794 * [`LinkedList::contains`](https://doc.rust-lang.org/std/collections/linked_list/struct.LinkedList.html#method.contains)
1795 * [`VecDeque::contains`](https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.contains)
1796 * [`ExitStatusExt::from_raw`](https://doc.rust-lang.org/std/os/unix/process/trait.ExitStatusExt.html#tymethod.from_raw).
1797 Both on Unix and Windows.
1798 * [`Receiver::recv_timeout`](https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.recv_timeout)
1799 * [`RecvTimeoutError`](https://doc.rust-lang.org/std/sync/mpsc/enum.RecvTimeoutError.html)
1800 * [`BinaryHeap::peek_mut`](https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.peek_mut)
1801 * [`PeekMut`](https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html)
1802 * [`iter::Product`](https://doc.rust-lang.org/std/iter/trait.Product.html)
1803 * [`iter::Sum`](https://doc.rust-lang.org/std/iter/trait.Sum.html)
1804 * [`OccupiedEntry::remove_entry`](https://doc.rust-lang.org/std/collections/btree_map/struct.OccupiedEntry.html#method.remove_entry)
1805 * [`VacantEntry::into_key`](https://doc.rust-lang.org/std/collections/btree_map/struct.VacantEntry.html#method.into_key)
1810 * [The `format!` macro and friends now allow a single argument to be formatted
1811 in multiple styles](https://github.com/rust-lang/rust/pull/33642)
1812 * [The lifetime bounds on `[T]::binary_search_by` and
1813 `[T]::binary_search_by_key` have been adjusted to be more flexible](https://github.com/rust-lang/rust/pull/34762)
1814 * [`Option` implements `From` for its contained type](https://github.com/rust-lang/rust/pull/34828)
1815 * [`Cell`, `RefCell` and `UnsafeCell` implement `From` for their contained type](https://github.com/rust-lang/rust/pull/35392)
1816 * [`RwLock` panics if the reader count overflows](https://github.com/rust-lang/rust/pull/35378)
1817 * [`vec_deque::Drain`, `hash_map::Drain` and `hash_set::Drain` are covariant](https://github.com/rust-lang/rust/pull/35354)
1818 * [`vec::Drain` and `binary_heap::Drain` are covariant](https://github.com/rust-lang/rust/pull/34951)
1819 * [`Cow<str>` implements `FromIterator` for `char`, `&str` and `String`](https://github.com/rust-lang/rust/pull/35064)
1820 * [Sockets on Linux are correctly closed in subprocesses via `SOCK_CLOEXEC`](https://github.com/rust-lang/rust/pull/34946)
1821 * [`hash_map::Entry`, `hash_map::VacantEntry` and `hash_map::OccupiedEntry`
1822 implement `Debug`](https://github.com/rust-lang/rust/pull/34937)
1823 * [`btree_map::Entry`, `btree_map::VacantEntry` and `btree_map::OccupiedEntry`
1824 implement `Debug`](https://github.com/rust-lang/rust/pull/34885)
1825 * [`String` implements `AddAssign`](https://github.com/rust-lang/rust/pull/34890)
1826 * [Variadic `extern fn` pointers implement the `Clone`, `PartialEq`, `Eq`,
1827 `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and `fmt::Debug` traits](https://github.com/rust-lang/rust/pull/34879)
1828 * [`FileType` implements `Debug`](https://github.com/rust-lang/rust/pull/34757)
1829 * [References to `Mutex` and `RwLock` are unwind-safe](https://github.com/rust-lang/rust/pull/34756)
1830 * [`mpsc::sync_channel` `Receiver`s return any available message before
1831 reporting a disconnect](https://github.com/rust-lang/rust/pull/34731)
1832 * [Unicode definitions have been updated to 9.0](https://github.com/rust-lang/rust/pull/34599)
1833 * [`env` iterators implement `DoubleEndedIterator`](https://github.com/rust-lang/rust/pull/33312)
1838 * [Support local mirrors of registries](https://github.com/rust-lang/cargo/pull/2857)
1839 * [Add support for command aliases](https://github.com/rust-lang/cargo/pull/2679)
1840 * [Allow `opt-level="s"` / `opt-level="z"` in profile overrides](https://github.com/rust-lang/cargo/pull/3007)
1841 * [Make `cargo doc --open --target` work as expected](https://github.com/rust-lang/cargo/pull/2988)
1842 * [Speed up noop registry updates](https://github.com/rust-lang/cargo/pull/2974)
1843 * [Update OpenSSL](https://github.com/rust-lang/cargo/pull/2971)
1844 * [Fix `--panic=abort` with plugins](https://github.com/rust-lang/cargo/pull/2954)
1845 * [Always pass `-C metadata` to the compiler](https://github.com/rust-lang/cargo/pull/2946)
1846 * [Fix depending on git repos with workspaces](https://github.com/rust-lang/cargo/pull/2938)
1847 * [Add a `--lib` flag to `cargo new`](https://github.com/rust-lang/cargo/pull/2921)
1848 * [Add `http.cainfo` for custom certs](https://github.com/rust-lang/cargo/pull/2917)
1849 * [Indicate the compilation profile after compiling](https://github.com/rust-lang/cargo/pull/2909)
1850 * [Allow enabling features for dependencies with `--features`](https://github.com/rust-lang/cargo/pull/2876)
1851 * [Add `--jobs` flag to `cargo package`](https://github.com/rust-lang/cargo/pull/2867)
1852 * [Add `--dry-run` to `cargo publish`](https://github.com/rust-lang/cargo/pull/2849)
1853 * [Add support for `RUSTDOCFLAGS`](https://github.com/rust-lang/cargo/pull/2794)
1858 * [`panic::catch_unwind` is more optimized](https://github.com/rust-lang/rust/pull/35444)
1859 * [`panic::catch_unwind` no longer accesses thread-local storage on entry](https://github.com/rust-lang/rust/pull/34866)
1864 * [Test binaries now support a `--test-threads` argument to specify the number
1865 of threads used to run tests, and which acts the same as the
1866 `RUST_TEST_THREADS` environment variable](https://github.com/rust-lang/rust/pull/35414)
1867 * [The test runner now emits a warning when tests run over 60 seconds](https://github.com/rust-lang/rust/pull/35405)
1868 * [rustdoc: Fix methods in search results](https://github.com/rust-lang/rust/pull/34752)
1869 * [`rust-lldb` warns about unsupported versions of LLDB](https://github.com/rust-lang/rust/pull/34646)
1870 * [Rust releases now come with source packages that can be installed by rustup
1871 via `rustup component add rust-src`](https://github.com/rust-lang/rust/pull/34366).
1872 The resulting source code can be used by tools and IDES, located in the
1873 sysroot under `lib/rustlib/src`.
1878 * [The compiler can now be built against LLVM 3.9](https://github.com/rust-lang/rust/pull/35594)
1879 * Many minor improvements to the documentation.
1880 * [The Rust exception handling "personality" routine is now written in Rust](https://github.com/rust-lang/rust/pull/34832)
1885 * [When printing Windows `OsStr`s, unpaired surrogate codepoints are escaped
1886 with the lowercase format instead of the uppercase](https://github.com/rust-lang/rust/pull/35084)
1887 * [When formatting strings, if "precision" is specified, the "fill",
1888 "align" and "width" specifiers are no longer ignored](https://github.com/rust-lang/rust/pull/34544)
1889 * [The `Debug` impl for strings no longer escapes all non-ASCII characters](https://github.com/rust-lang/rust/pull/34485)
1892 Version 1.11.0 (2016-08-18)
1893 ===========================
1898 * [`cfg_attr` works on `path` attributes](https://github.com/rust-lang/rust/pull/34546)
1899 * [Support nested `cfg_attr` attributes](https://github.com/rust-lang/rust/pull/34216)
1900 * [Allow statement-generating braced macro invocations at the end of blocks](https://github.com/rust-lang/rust/pull/34436)
1901 * [Macros can be expanded inside of trait definitions](https://github.com/rust-lang/rust/pull/34213)
1902 * [`#[macro_use]` works properly when it is itself expanded from a macro](https://github.com/rust-lang/rust/pull/34032)
1907 * [`BinaryHeap::append`](https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.append)
1908 * [`BTreeMap::append`](https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.append)
1909 * [`BTreeMap::split_off`](https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.split_off)
1910 * [`BTreeSet::append`](https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.append)
1911 * [`BTreeSet::split_off`](https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.split_off)
1912 * [`f32::to_degrees`](https://doc.rust-lang.org/std/primitive.f32.html#method.to_degrees)
1913 (in libcore - previously stabilized in libstd)
1914 * [`f32::to_radians`](https://doc.rust-lang.org/std/primitive.f32.html#method.to_radians)
1915 (in libcore - previously stabilized in libstd)
1916 * [`f64::to_degrees`](https://doc.rust-lang.org/std/primitive.f64.html#method.to_degrees)
1917 (in libcore - previously stabilized in libstd)
1918 * [`f64::to_radians`](https://doc.rust-lang.org/std/primitive.f64.html#method.to_radians)
1919 (in libcore - previously stabilized in libstd)
1920 * [`Iterator::sum`](https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
1921 * [`Iterator::product`](https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
1922 * [`Cell::get_mut`](https://doc.rust-lang.org/std/cell/struct.Cell.html#method.get_mut)
1923 * [`RefCell::get_mut`](https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.get_mut)
1928 * [The `thread_local!` macro supports multiple definitions in a single
1929 invocation, and can apply attributes](https://github.com/rust-lang/rust/pull/34077)
1930 * [`Cow` implements `Default`](https://github.com/rust-lang/rust/pull/34305)
1931 * [`Wrapping` implements binary, octal, lower-hex and upper-hex
1932 `Display` formatting](https://github.com/rust-lang/rust/pull/34190)
1933 * [The range types implement `Hash`](https://github.com/rust-lang/rust/pull/34180)
1934 * [`lookup_host` ignores unknown address types](https://github.com/rust-lang/rust/pull/34067)
1935 * [`assert_eq!` accepts a custom error message, like `assert!` does](https://github.com/rust-lang/rust/pull/33976)
1936 * [The main thread is now called "main" instead of "<main>"](https://github.com/rust-lang/rust/pull/33803)
1941 * [Disallow specifying features of transitive deps](https://github.com/rust-lang/cargo/pull/2821)
1942 * [Add color support for Windows consoles](https://github.com/rust-lang/cargo/pull/2804)
1943 * [Fix `harness = false` on `[lib]` sections](https://github.com/rust-lang/cargo/pull/2795)
1944 * [Don't panic when `links` contains a '.'](https://github.com/rust-lang/cargo/pull/2787)
1945 * [Build scripts can emit warnings](https://github.com/rust-lang/cargo/pull/2630),
1946 and `-vv` prints warnings for all crates.
1947 * [Ignore file locks on OS X NFS mounts](https://github.com/rust-lang/cargo/pull/2720)
1948 * [Don't warn about `package.metadata` keys](https://github.com/rust-lang/cargo/pull/2668).
1949 This provides room for expansion by arbitrary tools.
1950 * [Add support for cdylib crate types](https://github.com/rust-lang/cargo/pull/2741)
1951 * [Prevent publishing crates when files are dirty](https://github.com/rust-lang/cargo/pull/2781)
1952 * [Don't fetch all crates on clean](https://github.com/rust-lang/cargo/pull/2704)
1953 * [Propagate --color option to rustc](https://github.com/rust-lang/cargo/pull/2779)
1954 * [Fix `cargo doc --open` on Windows](https://github.com/rust-lang/cargo/pull/2780)
1955 * [Improve autocompletion](https://github.com/rust-lang/cargo/pull/2772)
1956 * [Configure colors of stderr as well as stdout](https://github.com/rust-lang/cargo/pull/2739)
1961 * [Caching projections speeds up type check dramatically for some
1962 workloads](https://github.com/rust-lang/rust/pull/33816)
1963 * [The default `HashMap` hasher is SipHash 1-3 instead of SipHash 2-4](https://github.com/rust-lang/rust/pull/33940)
1964 This hasher is faster, but is believed to provide sufficient
1965 protection from collision attacks.
1966 * [Comparison of `Ipv4Addr` is 10x faster](https://github.com/rust-lang/rust/pull/33891)
1971 * [Fix empty implementation section on some module pages](https://github.com/rust-lang/rust/pull/34536)
1972 * [Fix inlined renamed reexports in import lists](https://github.com/rust-lang/rust/pull/34479)
1973 * [Fix search result layout for enum variants and struct fields](https://github.com/rust-lang/rust/pull/34477)
1974 * [Fix issues with source links to external crates](https://github.com/rust-lang/rust/pull/34387)
1975 * [Fix redirect pages for renamed reexports](https://github.com/rust-lang/rust/pull/34245)
1980 * [rustc is better at finding the MSVC toolchain](https://github.com/rust-lang/rust/pull/34492)
1981 * [When emitting debug info, rustc emits frame pointers for closures,
1982 shims and glue, as it does for all other functions](https://github.com/rust-lang/rust/pull/33909)
1983 * [rust-lldb warns about unsupported versions of LLDB](https://github.com/rust-lang/rust/pull/34646)
1984 * Many more errors have been given error codes and extended
1986 * API documentation continues to be improved, with many new examples
1991 * [rustc no longer hangs when dependencies recursively re-export
1992 submodules](https://github.com/rust-lang/rust/pull/34542)
1993 * [rustc requires LLVM 3.7+](https://github.com/rust-lang/rust/pull/34104)
1994 * [The 'How Safe and Unsafe Interact' chapter of The Rustonomicon was
1995 rewritten](https://github.com/rust-lang/rust/pull/33895)
1996 * [rustc support 16-bit pointer sizes](https://github.com/rust-lang/rust/pull/33460).
1997 No targets use this yet, but it works toward AVR support.
2002 * [`const`s and `static`s may not have unsized types](https://github.com/rust-lang/rust/pull/34443)
2003 * [The new follow-set rules that place restrictions on `macro_rules!`
2004 in order to ensure syntax forward-compatibility have been enabled](https://github.com/rust-lang/rust/pull/33982)
2005 This was an [ammendment to RFC 550](https://github.com/rust-lang/rfcs/pull/1384),
2006 and has been a warning since 1.10.
2007 * [`cfg` attribute process has been refactored to fix various bugs](https://github.com/rust-lang/rust/pull/33706).
2008 This causes breakage in some corner cases.
2011 Version 1.10.0 (2016-07-07)
2012 ===========================
2017 * [Allow `concat_idents!` in type positions as well as in expression
2018 positions](https://github.com/rust-lang/rust/pull/33735).
2019 * [`Copy` types are required to have a trivial implementation of `Clone`](https://github.com/rust-lang/rust/pull/33420).
2020 [RFC 1521](https://github.com/rust-lang/rfcs/blob/master/text/1521-copy-clone-semantics.md).
2021 * [Single-variant enums support the `#[repr(..)]` attribute](https://github.com/rust-lang/rust/pull/33355).
2022 * [Fix `#[derive(RustcEncodable)]` in the presence of other `encode` methods](https://github.com/rust-lang/rust/pull/32908).
2023 * [`panic!` can be converted to a runtime abort with the
2024 `-C panic=abort` flag](https://github.com/rust-lang/rust/pull/32900).
2025 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
2026 * [Add a new crate type, 'cdylib'](https://github.com/rust-lang/rust/pull/33553).
2027 cdylibs are dynamic libraries suitable for loading by non-Rust hosts.
2028 [RFC 1510](https://github.com/rust-lang/rfcs/blob/master/text/1510-rdylib.md).
2029 Note that Cargo does not yet directly support cdylibs.
2034 * `os::windows::fs::OpenOptionsExt::access_mode`
2035 * `os::windows::fs::OpenOptionsExt::share_mode`
2036 * `os::windows::fs::OpenOptionsExt::custom_flags`
2037 * `os::windows::fs::OpenOptionsExt::attributes`
2038 * `os::windows::fs::OpenOptionsExt::security_qos_flags`
2039 * `os::unix::fs::OpenOptionsExt::custom_flags`
2040 * [`sync::Weak::new`](http://doc.rust-lang.org/alloc/arc/struct.Weak.html#method.new)
2041 * `Default for sync::Weak`
2042 * [`panic::set_hook`](http://doc.rust-lang.org/std/panic/fn.set_hook.html)
2043 * [`panic::take_hook`](http://doc.rust-lang.org/std/panic/fn.take_hook.html)
2044 * [`panic::PanicInfo`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html)
2045 * [`panic::PanicInfo::payload`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.payload)
2046 * [`panic::PanicInfo::location`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.location)
2047 * [`panic::Location`](http://doc.rust-lang.org/std/panic/struct.Location.html)
2048 * [`panic::Location::file`](http://doc.rust-lang.org/std/panic/struct.Location.html#method.file)
2049 * [`panic::Location::line`](http://doc.rust-lang.org/std/panic/struct.Location.html#method.line)
2050 * [`ffi::CStr::from_bytes_with_nul`](http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul)
2051 * [`ffi::CStr::from_bytes_with_nul_unchecked`](http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul_unchecked)
2052 * [`ffi::FromBytesWithNulError`](http://doc.rust-lang.org/std/ffi/struct.FromBytesWithNulError.html)
2053 * [`fs::Metadata::modified`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.modified)
2054 * [`fs::Metadata::accessed`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.accessed)
2055 * [`fs::Metadata::created`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.created)
2056 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange`
2057 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange_weak`
2058 * `collections::{btree,hash}_map::{Occupied,Vacant,}Entry::key`
2059 * `os::unix::net::{UnixStream, UnixListener, UnixDatagram, SocketAddr}`
2060 * [`SocketAddr::is_unnamed`](http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.is_unnamed)
2061 * [`SocketAddr::as_pathname`](http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.as_pathname)
2062 * [`UnixStream::connect`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.connect)
2063 * [`UnixStream::pair`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.pair)
2064 * [`UnixStream::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.try_clone)
2065 * [`UnixStream::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.local_addr)
2066 * [`UnixStream::peer_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.peer_addr)
2067 * [`UnixStream::set_read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
2068 * [`UnixStream::set_write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
2069 * [`UnixStream::read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
2070 * [`UnixStream::write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
2071 * [`UnixStream::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.set_nonblocking)
2072 * [`UnixStream::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.take_error)
2073 * [`UnixStream::shutdown`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.shutdown)
2074 * Read/Write/RawFd impls for `UnixStream`
2075 * [`UnixListener::bind`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.bind)
2076 * [`UnixListener::accept`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.accept)
2077 * [`UnixListener::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.try_clone)
2078 * [`UnixListener::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.local_addr)
2079 * [`UnixListener::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.set_nonblocking)
2080 * [`UnixListener::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.take_error)
2081 * [`UnixListener::incoming`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.incoming)
2082 * RawFd impls for `UnixListener`
2083 * [`UnixDatagram::bind`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.bind)
2084 * [`UnixDatagram::unbound`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.unbound)
2085 * [`UnixDatagram::pair`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.pair)
2086 * [`UnixDatagram::connect`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.connect)
2087 * [`UnixDatagram::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.try_clone)
2088 * [`UnixDatagram::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.local_addr)
2089 * [`UnixDatagram::peer_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.peer_addr)
2090 * [`UnixDatagram::recv_from`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv_from)
2091 * [`UnixDatagram::recv`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv)
2092 * [`UnixDatagram::send_to`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send_to)
2093 * [`UnixDatagram::send`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send)
2094 * [`UnixDatagram::set_read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_read_timeout)
2095 * [`UnixDatagram::set_write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_write_timeout)
2096 * [`UnixDatagram::read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.read_timeout)
2097 * [`UnixDatagram::write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.write_timeout)
2098 * [`UnixDatagram::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_nonblocking)
2099 * [`UnixDatagram::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.take_error)
2100 * [`UnixDatagram::shutdown`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.shutdown)
2101 * RawFd impls for `UnixDatagram`
2102 * `{BTree,Hash}Map::values_mut`
2103 * [`<[_]>::binary_search_by_key`](http://doc.rust-lang.org/beta/std/primitive.slice.html#method.binary_search_by_key)
2108 * [The `abs_sub` method of floats is deprecated](https://github.com/rust-lang/rust/pull/33664).
2109 The semantics of this minor method are subtle and probably not what
2111 * [Add implementation of Ord for Cell<T> and RefCell<T> where T: Ord](https://github.com/rust-lang/rust/pull/33306).
2112 * [On Linux, if `HashMap`s can't be initialized with `getrandom` they
2113 will fall back to `/dev/urandom` temporarily to avoid blocking
2114 during early boot](https://github.com/rust-lang/rust/pull/33086).
2115 * [Implemented negation for wrapping numerals](https://github.com/rust-lang/rust/pull/33067).
2116 * [Implement `Clone` for `binary_heap::IntoIter`](https://github.com/rust-lang/rust/pull/33050).
2117 * [Implement `Display` and `Hash` for `std::num::Wrapping`](https://github.com/rust-lang/rust/pull/33023).
2118 * [Add `Default` implementation for `&CStr`, `CString`](https://github.com/rust-lang/rust/pull/32990).
2119 * [Implement `From<Vec<T>>` and `Into<Vec<T>>` for `VecDeque<T>`](https://github.com/rust-lang/rust/pull/32866).
2120 * [Implement `Default` for `UnsafeCell`, `fmt::Error`, `Condvar`,
2121 `Mutex`, `RwLock`](https://github.com/rust-lang/rust/pull/32785).
2125 * [Cargo.toml supports the `profile.*.panic` option](https://github.com/rust-lang/cargo/pull/2687).
2126 This controls the runtime behavior of the `panic!` macro
2127 and can be either "unwind" (the default), or "abort".
2128 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
2129 * [Don't throw away errors with `-p` arguments](https://github.com/rust-lang/cargo/pull/2723).
2130 * [Report status to stderr instead of stdout](https://github.com/rust-lang/cargo/pull/2693).
2131 * [Build scripts are passed a `CARGO_MANIFEST_LINKS` environment
2132 variable that corresponds to the `links` field of the manifest](https://github.com/rust-lang/cargo/pull/2710).
2133 * [Ban keywords from crate names](https://github.com/rust-lang/cargo/pull/2707).
2134 * [Canonicalize `CARGO_HOME` on Windows](https://github.com/rust-lang/cargo/pull/2604).
2135 * [Retry network requests](https://github.com/rust-lang/cargo/pull/2396).
2136 By default they are retried twice, which can be customized with the
2137 `net.retry` value in `.cargo/config`.
2138 * [Don't print extra error info for failing subcommands](https://github.com/rust-lang/cargo/pull/2674).
2139 * [Add `--force` flag to `cargo install`](https://github.com/rust-lang/cargo/pull/2405).
2140 * [Don't use `flock` on NFS mounts](https://github.com/rust-lang/cargo/pull/2623).
2141 * [Prefer building `cargo install` artifacts in temporary directories](https://github.com/rust-lang/cargo/pull/2610).
2142 Makes it possible to install multiple crates in parallel.
2143 * [Add `cargo test --doc`](https://github.com/rust-lang/cargo/pull/2578).
2144 * [Add `cargo --explain`](https://github.com/rust-lang/cargo/pull/2551).
2145 * [Don't print warnings when `-q` is passed](https://github.com/rust-lang/cargo/pull/2576).
2146 * [Add `cargo doc --lib` and `--bin`](https://github.com/rust-lang/cargo/pull/2577).
2147 * [Don't require build script output to be UTF-8](https://github.com/rust-lang/cargo/pull/2560).
2148 * [Correctly attempt multiple git usernames](https://github.com/rust-lang/cargo/pull/2584).
2153 * [rustc memory usage was reduced by refactoring the context used for
2154 type checking](https://github.com/rust-lang/rust/pull/33425).
2155 * [Speed up creation of `HashMap`s by caching the random keys used
2156 to initialize the hash state](https://github.com/rust-lang/rust/pull/33318).
2157 * [The `find` implementation for `Chain` iterators is 2x faster](https://github.com/rust-lang/rust/pull/33289).
2158 * [Trait selection optimizations speed up type checking by 15%](https://github.com/rust-lang/rust/pull/33138).
2159 * [Efficient trie lookup for boolean Unicode properties](https://github.com/rust-lang/rust/pull/33098).
2160 10x faster than the previous lookup tables.
2161 * [Special case `#[derive(Copy, Clone)]` to avoid bloat](https://github.com/rust-lang/rust/pull/31414).
2166 * Many incremental improvements to documentation and rustdoc.
2167 * [rustdoc: List blanket trait impls](https://github.com/rust-lang/rust/pull/33514).
2168 * [rustdoc: Clean up ABI rendering](https://github.com/rust-lang/rust/pull/33151).
2169 * [Indexing with the wrong type produces a more informative error](https://github.com/rust-lang/rust/pull/33401).
2170 * [Improve diagnostics for constants being used in irrefutable patterns](https://github.com/rust-lang/rust/pull/33406).
2171 * [When many method candidates are in scope limit the suggestions to 10](https://github.com/rust-lang/rust/pull/33338).
2172 * [Remove confusing suggestion when calling a `fn` type](https://github.com/rust-lang/rust/pull/33325).
2173 * [Do not suggest changing `&mut self` to `&mut mut self`](https://github.com/rust-lang/rust/pull/33319).
2178 * [Update i686-linux-android features to match Android ABI](https://github.com/rust-lang/rust/pull/33651).
2179 * [Update aarch64-linux-android features to match Android ABI](https://github.com/rust-lang/rust/pull/33500).
2180 * [`std` no longer prints backtraces on platforms where the running
2181 module must be loaded with `env::current_exe`, which can't be relied
2182 on](https://github.com/rust-lang/rust/pull/33554).
2183 * This release includes std binaries for the i586-unknown-linux-gnu,
2184 i686-unknown-linux-musl, and armv7-linux-androideabi targets. The
2185 i586 target is for old x86 hardware without SSE2, and the armv7
2186 target is for Android running on modern ARM architectures.
2187 * [The `rust-gdb` and `rust-lldb` scripts are distributed on all
2188 Unix platforms](https://github.com/rust-lang/rust/pull/32835).
2189 * [On Unix the runtime aborts by calling `libc::abort` instead of
2190 generating an illegal instruction](https://github.com/rust-lang/rust/pull/31457).
2191 * [Rust is now bootstrapped from the previous release of Rust,
2192 instead of a snapshot from an arbitrary commit](https://github.com/rust-lang/rust/pull/32942).
2197 * [`AtomicBool` is now bool-sized, not word-sized](https://github.com/rust-lang/rust/pull/33579).
2198 * [`target_env` for Linux ARM targets is just `gnu`, not
2199 `gnueabihf`, `gnueabi`, etc](https://github.com/rust-lang/rust/pull/33403).
2200 * [Consistently panic on overflow in `Duration::new`](https://github.com/rust-lang/rust/pull/33072).
2201 * [Change `String::truncate` to panic less](https://github.com/rust-lang/rust/pull/32977).
2202 * [Add `:block` to the follow set for `:ty` and `:path`](https://github.com/rust-lang/rust/pull/32945).
2203 Affects how macros are parsed.
2204 * [Fix macro hygiene bug](https://github.com/rust-lang/rust/pull/32923).
2205 * [Feature-gated attributes on macro-generated macro invocations are
2206 now rejected](https://github.com/rust-lang/rust/pull/32791).
2207 * [Suppress fallback and ambiguity errors during type inference](https://github.com/rust-lang/rust/pull/32258).
2208 This caused some minor changes to type inference.
2211 Version 1.9.0 (2016-05-26)
2212 ==========================
2217 * The `#[deprecated]` attribute when applied to an API will generate
2218 warnings when used. The warnings may be suppressed with
2219 `#[allow(deprecated)]`. [RFC 1270].
2220 * [`fn` item types are zero sized, and each `fn` names a unique
2221 type][1.9fn]. This will break code that transmutes `fn`s, so calling
2222 `transmute` on a `fn` type will generate a warning for a few cycles,
2223 then will be converted to an error.
2224 * [Field and method resolution understand visibility, so private
2225 fields and methods cannot prevent the proper use of public fields
2226 and methods][1.9fv].
2227 * [The parser considers unicode codepoints in the
2228 `PATTERN_WHITE_SPACE` category to be whitespace][1.9ws].
2234 * [`std::panic::catch_unwind`][] (renamed from `recover`)
2235 * [`std::panic::resume_unwind`][] (renamed from `propagate`)
2236 * [`std::panic::AssertUnwindSafe`][] (renamed from `AssertRecoverSafe`)
2237 * [`std::panic::UnwindSafe`][] (renamed from `RecoverSafe`)
2238 * [`str::is_char_boundary`]
2239 * [`<*const T>::as_ref`]
2240 * [`<*mut T>::as_ref`]
2241 * [`<*mut T>::as_mut`]
2242 * [`AsciiExt::make_ascii_uppercase`]
2243 * [`AsciiExt::make_ascii_lowercase`]
2244 * [`char::decode_utf16`]
2245 * [`char::DecodeUtf16`]
2246 * [`char::DecodeUtf16Error`]
2247 * [`char::DecodeUtf16Error::unpaired_surrogate`]
2248 * [`BTreeSet::take`]
2249 * [`BTreeSet::replace`]
2252 * [`HashSet::replace`]
2254 * [`OsString::with_capacity`]
2255 * [`OsString::clear`]
2256 * [`OsString::capacity`]
2257 * [`OsString::reserve`]
2258 * [`OsString::reserve_exact`]
2259 * [`OsStr::is_empty`]
2261 * [`std::os::unix::thread`]
2264 * [`JoinHandleExt::as_pthread_t`]
2265 * [`JoinHandleExt::into_pthread_t`]
2266 * [`HashSet::hasher`]
2267 * [`HashMap::hasher`]
2268 * [`CommandExt::exec`]
2269 * [`File::try_clone`]
2270 * [`SocketAddr::set_ip`]
2271 * [`SocketAddr::set_port`]
2272 * [`SocketAddrV4::set_ip`]
2273 * [`SocketAddrV4::set_port`]
2274 * [`SocketAddrV6::set_ip`]
2275 * [`SocketAddrV6::set_port`]
2276 * [`SocketAddrV6::set_flowinfo`]
2277 * [`SocketAddrV6::set_scope_id`]
2278 * [`slice::copy_from_slice`]
2279 * [`ptr::read_volatile`]
2280 * [`ptr::write_volatile`]
2281 * [`OpenOptions::create_new`]
2282 * [`TcpStream::set_nodelay`]
2283 * [`TcpStream::nodelay`]
2284 * [`TcpStream::set_ttl`]
2285 * [`TcpStream::ttl`]
2286 * [`TcpStream::set_only_v6`]
2287 * [`TcpStream::only_v6`]
2288 * [`TcpStream::take_error`]
2289 * [`TcpStream::set_nonblocking`]
2290 * [`TcpListener::set_ttl`]
2291 * [`TcpListener::ttl`]
2292 * [`TcpListener::set_only_v6`]
2293 * [`TcpListener::only_v6`]
2294 * [`TcpListener::take_error`]
2295 * [`TcpListener::set_nonblocking`]
2296 * [`UdpSocket::set_broadcast`]
2297 * [`UdpSocket::broadcast`]
2298 * [`UdpSocket::set_multicast_loop_v4`]
2299 * [`UdpSocket::multicast_loop_v4`]
2300 * [`UdpSocket::set_multicast_ttl_v4`]
2301 * [`UdpSocket::multicast_ttl_v4`]
2302 * [`UdpSocket::set_multicast_loop_v6`]
2303 * [`UdpSocket::multicast_loop_v6`]
2304 * [`UdpSocket::set_multicast_ttl_v6`]
2305 * [`UdpSocket::multicast_ttl_v6`]
2306 * [`UdpSocket::set_ttl`]
2307 * [`UdpSocket::ttl`]
2308 * [`UdpSocket::set_only_v6`]
2309 * [`UdpSocket::only_v6`]
2310 * [`UdpSocket::join_multicast_v4`]
2311 * [`UdpSocket::join_multicast_v6`]
2312 * [`UdpSocket::leave_multicast_v4`]
2313 * [`UdpSocket::leave_multicast_v6`]
2314 * [`UdpSocket::take_error`]
2315 * [`UdpSocket::connect`]
2316 * [`UdpSocket::send`]
2317 * [`UdpSocket::recv`]
2318 * [`UdpSocket::set_nonblocking`]
2323 * [`std::sync::Once` is poisoned if its initialization function
2325 * [`cell::Ref` and `cell::RefMut` can contain unsized types][1.9cu].
2326 * [Most types implement `fmt::Debug`][1.9db].
2327 * [The default buffer size used by `BufReader` and `BufWriter` was
2328 reduced to 8K, from 64K][1.9bf]. This is in line with the buffer size
2329 used by other languages.
2330 * [`Instant`, `SystemTime` and `Duration` implement `+=` and `-=`.
2331 `Duration` additionally implements `*=` and `/=`][1.9ta].
2332 * [`Skip` is a `DoubleEndedIterator`][1.9sk].
2333 * [`From<[u8; 4]>` is implemented for `Ipv4Addr`][1.9fi].
2334 * [`Chain` implements `BufRead`][1.9ch].
2335 * [`HashMap`, `HashSet` and iterators are covariant][1.9hc].
2340 * [Cargo can now run concurrently][1.9cc].
2341 * [Top-level overrides allow specific revisions of crates to be
2342 overridden through the entire crate graph][1.9ct]. This is intended
2343 to make upgrades easier for large projects, by allowing crates to be
2344 forked temporarily until they've been upgraded and republished.
2345 * [Cargo exports a `CARGO_PKG_AUTHORS` environment variable][1.9cp].
2346 * [Cargo will pass the contents of the `RUSTFLAGS` variable to `rustc`
2347 on the commandline][1.9cf]. `rustc` arguments can also be specified
2348 in the `build.rustflags` configuration key.
2353 * [The time complexity of comparing variables for equivalence during type
2354 unification is reduced from _O_(_n_!) to _O_(_n_)][1.9tu]. This leads
2355 to major compilation time improvement in some scenarios.
2356 * [`ToString` is specialized for `str`, giving it the same performance
2357 as `to_owned`][1.9ts].
2358 * [Spawning processes with `Command::output` no longer creates extra
2360 * [`#[derive(PartialEq)]` and `#[derive(PartialOrd)]` emit less code
2361 for C-like enums][1.9cl].
2366 * [Passing the `--quiet` flag to a test runner will produce
2367 much-abbreviated output][1.9q].
2368 * The Rust Project now publishes std binaries for the
2369 `mips-unknown-linux-musl`, `mipsel-unknown-linux-musl`, and
2370 `i586-pc-windows-msvc` targets.
2375 * [`std::sync::Once` is poisoned if its initialization function
2377 * [It is illegal to define methods with the same name in overlapping
2378 inherent `impl` blocks][1.9sn].
2379 * [`fn` item types are zero sized, and each `fn` names a unique
2380 type][1.9fn]. This will break code that transmutes `fn`s, so calling
2381 `transmute` on a `fn` type will generate a warning for a few cycles,
2382 then will be converted to an error.
2383 * [Improvements to const evaluation may trigger new errors when integer
2384 literals are out of range][1.9ce].
2387 [1.9bf]: https://github.com/rust-lang/rust/pull/32695
2388 [1.9cc]: https://github.com/rust-lang/cargo/pull/2486
2389 [1.9ce]: https://github.com/rust-lang/rust/pull/30587
2390 [1.9cf]: https://github.com/rust-lang/cargo/pull/2241
2391 [1.9ch]: https://github.com/rust-lang/rust/pull/32541
2392 [1.9cl]: https://github.com/rust-lang/rust/pull/31977
2393 [1.9cp]: https://github.com/rust-lang/cargo/pull/2465
2394 [1.9ct]: https://github.com/rust-lang/cargo/pull/2385
2395 [1.9cu]: https://github.com/rust-lang/rust/pull/32652
2396 [1.9db]: https://github.com/rust-lang/rust/pull/32054
2397 [1.9fi]: https://github.com/rust-lang/rust/pull/32050
2398 [1.9fn]: https://github.com/rust-lang/rust/pull/31710
2399 [1.9fv]: https://github.com/rust-lang/rust/pull/31938
2400 [1.9hc]: https://github.com/rust-lang/rust/pull/32635
2401 [1.9o]: https://github.com/rust-lang/rust/pull/32325
2402 [1.9q]: https://github.com/rust-lang/rust/pull/31887
2403 [1.9sk]: https://github.com/rust-lang/rust/pull/31700
2404 [1.9sn]: https://github.com/rust-lang/rust/pull/31925
2405 [1.9sp]: https://github.com/rust-lang/rust/pull/31618
2406 [1.9ta]: https://github.com/rust-lang/rust/pull/32448
2407 [1.9ts]: https://github.com/rust-lang/rust/pull/32586
2408 [1.9tu]: https://github.com/rust-lang/rust/pull/32062
2409 [1.9ws]: https://github.com/rust-lang/rust/pull/29734
2410 [RFC 1270]: https://github.com/rust-lang/rfcs/blob/master/text/1270-deprecation.md
2411 [`<*const T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
2412 [`<*mut T>::as_mut`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_mut
2413 [`<*mut T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
2414 [`slice::copy_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.copy_from_slice
2415 [`AsciiExt::make_ascii_lowercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_lowercase
2416 [`AsciiExt::make_ascii_uppercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_uppercase
2417 [`BTreeSet::get`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.get
2418 [`BTreeSet::replace`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.replace
2419 [`BTreeSet::take`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.take
2420 [`CommandExt::exec`]: http://doc.rust-lang.org/nightly/std/os/unix/process/trait.CommandExt.html#tymethod.exec
2421 [`File::try_clone`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html#method.try_clone
2422 [`HashMap::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.hasher
2423 [`HashSet::get`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.get
2424 [`HashSet::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.hasher
2425 [`HashSet::replace`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.replace
2426 [`HashSet::take`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.take
2427 [`JoinHandleExt::as_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.as_pthread_t
2428 [`JoinHandleExt::into_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.into_pthread_t
2429 [`JoinHandleExt`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html
2430 [`OpenOptions::create_new`]: http://doc.rust-lang.org/nightly/std/fs/struct.OpenOptions.html#method.create_new
2431 [`OsStr::is_empty`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.is_empty
2432 [`OsStr::len`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.len
2433 [`OsString::capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.capacity
2434 [`OsString::clear`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.clear
2435 [`OsString::reserve_exact`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve_exact
2436 [`OsString::reserve`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve
2437 [`OsString::with_capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.with_capacity
2438 [`RawPthread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/type.RawPthread.html
2439 [`SocketAddr::set_ip`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_ip
2440 [`SocketAddr::set_port`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_port
2441 [`SocketAddrV4::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_ip
2442 [`SocketAddrV4::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_port
2443 [`SocketAddrV6::set_flowinfo`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_flowinfo
2444 [`SocketAddrV6::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_ip
2445 [`SocketAddrV6::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_port
2446 [`SocketAddrV6::set_scope_id`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_scope_id
2447 [`TcpListener::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
2448 [`TcpListener::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
2449 [`TcpListener::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
2450 [`TcpListener::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
2451 [`TcpListener::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
2452 [`TcpListener::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
2453 [`TcpStream::nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.nodelay
2454 [`TcpStream::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
2455 [`TcpStream::set_nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nodelay
2456 [`TcpStream::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
2457 [`TcpStream::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
2458 [`TcpStream::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
2459 [`TcpStream::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
2460 [`TcpStream::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
2461 [`UdpSocket::broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.broadcast
2462 [`UdpSocket::connect`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.connect
2463 [`UdpSocket::join_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v4
2464 [`UdpSocket::join_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v6
2465 [`UdpSocket::leave_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v4
2466 [`UdpSocket::leave_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v6
2467 [`UdpSocket::multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v4
2468 [`UdpSocket::multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v6
2469 [`UdpSocket::multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v4
2470 [`UdpSocket::multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v6
2471 [`UdpSocket::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.only_v6
2472 [`UdpSocket::recv`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.recv
2473 [`UdpSocket::send`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.send
2474 [`UdpSocket::set_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_broadcast
2475 [`UdpSocket::set_multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v4
2476 [`UdpSocket::set_multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v6
2477 [`UdpSocket::set_multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v4
2478 [`UdpSocket::set_multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v6
2479 [`UdpSocket::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_nonblocking
2480 [`UdpSocket::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_only_v6
2481 [`UdpSocket::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_ttl
2482 [`UdpSocket::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.take_error
2483 [`UdpSocket::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.ttl
2484 [`char::DecodeUtf16Error::unpaired_surrogate`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html#method.unpaired_surrogate
2485 [`char::DecodeUtf16Error`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html
2486 [`char::DecodeUtf16`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16.html
2487 [`char::decode_utf16`]: http://doc.rust-lang.org/nightly/std/char/fn.decode_utf16.html
2488 [`ptr::read_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.read_volatile.html
2489 [`ptr::write_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.write_volatile.html
2490 [`std::os::unix::thread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/index.html
2491 [`std::panic::AssertUnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/struct.AssertUnwindSafe.html
2492 [`std::panic::UnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/trait.UnwindSafe.html
2493 [`std::panic::catch_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.catch_unwind.html
2494 [`std::panic::resume_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.resume_unwind.html
2495 [`std::panic`]: http://doc.rust-lang.org/nightly/std/panic/index.html
2496 [`str::is_char_boundary`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.is_char_boundary
2499 Version 1.8.0 (2016-04-14)
2500 ==========================
2505 * Rust supports overloading of compound assignment statements like
2506 `+=` by implementing the [`AddAssign`], [`SubAssign`],
2507 [`MulAssign`], [`DivAssign`], [`RemAssign`], [`BitAndAssign`],
2508 [`BitOrAssign`], [`BitXorAssign`], [`ShlAssign`], or [`ShrAssign`]
2510 * Empty structs can be defined with braces, as in `struct Foo { }`, in
2511 addition to the non-braced form, `struct Foo;`. [RFC 218].
2517 * [`str::encode_utf16`][] (renamed from `utf16_units`)
2518 * [`str::EncodeUtf16`][] (renamed from `Utf16Units`)
2521 * [`ptr::drop_in_place`]
2523 * [`time::SystemTime`]
2525 * [`Instant::duration_since`][] (renamed from `duration_from_earlier`)
2526 * [`Instant::elapsed`]
2527 * [`SystemTime::now`]
2528 * [`SystemTime::duration_since`][] (renamed from `duration_from_earlier`)
2529 * [`SystemTime::elapsed`]
2530 * Various `Add`/`Sub` impls for `Time` and `SystemTime`
2531 * [`SystemTimeError`]
2532 * [`SystemTimeError::duration`]
2533 * Various impls for `SystemTimeError`
2535 * [`AddAssign`], [`SubAssign`], [`MulAssign`], [`DivAssign`],
2536 [`RemAssign`], [`BitAndAssign`], [`BitOrAssign`],
2537 [`BitXorAssign`], [`ShlAssign`], [`ShrAssign`].
2538 * [The `write!` and `writeln!` macros correctly emit errors if any of
2539 their arguments can't be formatted][1.8w].
2540 * [Various I/O functions support large files on 32-bit Linux][1.8l].
2541 * [The Unix-specific `raw` modules, which contain a number of
2542 redefined C types are deprecated][1.8r], including `os::raw::unix`,
2543 `os::raw::macos`, and `os::raw::linux`. These modules defined types
2544 such as `ino_t` and `dev_t`. The inconsistency of these definitions
2545 across platforms was making it difficult to implement `std`
2546 correctly. Those that need these definitions should use the `libc`
2548 * The Unix-specific `MetadataExt` traits, including
2549 `os::unix::fs::MetadataExt`, which expose values such as inode
2550 numbers [no longer return platform-specific types][1.8r], but
2551 instead return widened integers. [RFC 1415].
2552 * [`btree_set::{IntoIter, Iter, Range}` are covariant][1.8cv].
2553 * [Atomic loads and stores are not volatile][1.8a].
2554 * [All types in `sync::mpsc` implement `fmt::Debug`][1.8mp].
2559 * [Inlining hash functions lead to a 3% compile-time improvement in
2560 some workloads][1.8h].
2561 * When using jemalloc, its symbols are [unprefixed so that it
2562 overrides the libc malloc implementation][1.8h]. This means that for
2563 rustc, LLVM is now using jemalloc, which results in a 6%
2564 compile-time improvement on a specific workload.
2565 * [Avoid quadratic growth in function size due to cleanups][1.8cu].
2570 * [32-bit MSVC builds finally implement unwinding][1.8ms].
2571 i686-pc-windows-msvc is now considered a tier-1 platform.
2572 * [The `--print targets` flag prints a list of supported targets][1.8t].
2573 * [The `--print cfg` flag prints the `cfg`s defined for the current
2575 * [`rustc` can be built with an new Cargo-based build system, written
2576 in Rust][1.8b]. It will eventually replace Rust's Makefile-based
2577 build system. To enable it configure with `configure --rustbuild`.
2578 * [Errors for non-exhaustive `match` patterns now list up to 3 missing
2579 variants while also indicating the total number of missing variants
2580 if more than 3][1.8m].
2581 * [Executable stacks are disabled on Linux and BSD][1.8nx].
2582 * The Rust Project now publishes binary releases of the standard
2583 library for a number of tier-2 targets:
2584 `armv7-unknown-linux-gnueabihf`, `powerpc-unknown-linux-gnu`,
2585 `powerpc64-unknown-linux-gnu`, `powerpc64le-unknown-linux-gnu`
2586 `x86_64-rumprun-netbsd`. These can be installed with
2587 tools such as [multirust][1.8mr].
2592 * [`cargo init` creates a new Cargo project in the current
2593 directory][1.8ci]. It is otherwise like `cargo new`.
2594 * [Cargo has configuration keys for `-v` and
2595 `--color`][1.8cc]. `verbose` and `color`, respectively, go in the
2596 `[term]` section of `.cargo/config`.
2597 * [Configuration keys that evaluate to strings or integers can be set
2598 via environment variables][1.8ce]. For example the `build.jobs` key
2599 can be set via `CARGO_BUILD_JOBS`. Environment variables take
2600 precedence over config files.
2601 * [Target-specific dependencies support Rust `cfg` syntax for
2602 describing targets][1.8cfg] so that dependencies for multiple
2603 targets can be specified together. [RFC 1361].
2604 * [The environment variables `CARGO_TARGET_ROOT`, `RUSTC`, and
2605 `RUSTDOC` take precedence over the `build.target-dir`,
2606 `build.rustc`, and `build.rustdoc` configuration values][1.8cv].
2607 * [The child process tree is killed on Windows when Cargo is
2609 * [The `build.target` configuration value sets the target platform,
2610 like `--target`][1.8ct].
2615 * [Unstable compiler flags have been further restricted][1.8u]. Since
2616 1.0 `-Z` flags have been considered unstable, and other flags that
2617 were considered unstable additionally required passing `-Z
2618 unstable-options` to access. Unlike unstable language and library
2619 features though, these options have been accessible on the stable
2620 release channel. Going forward, *new unstable flags will not be
2621 available on the stable release channel*, and old unstable flags
2622 will warn about their usage. In the future, all unstable flags will
2623 be unavailable on the stable release channel.
2624 * [It is no longer possible to `match` on empty enum variants using
2625 the `Variant(..)` syntax][1.8v]. This has been a warning since 1.6.
2626 * The Unix-specific `MetadataExt` traits, including
2627 `os::unix::fs::MetadataExt`, which expose values such as inode
2628 numbers [no longer return platform-specific types][1.8r], but
2629 instead return widened integers. [RFC 1415].
2630 * [Modules sourced from the filesystem cannot appear within arbitrary
2631 blocks, but only within other modules][1.8mf].
2632 * [`--cfg` compiler flags are parsed strictly as identifiers][1.8c].
2633 * On Unix, [stack overflow triggers a runtime abort instead of a
2635 * [`Command::spawn` and its equivalents return an error if any of
2636 its command-line arguments contain interior `NUL`s][1.8n].
2637 * [Tuple and unit enum variants from other crates are in the type
2639 * [On Windows `rustc` emits `.lib` files for the `staticlib` library
2640 type instead of `.a` files][1.8st]. Additionally, for the MSVC
2641 toolchain, `rustc` emits import libraries named `foo.dll.lib`
2642 instead of `foo.lib`.
2645 [1.8a]: https://github.com/rust-lang/rust/pull/30962
2646 [1.8b]: https://github.com/rust-lang/rust/pull/31123
2647 [1.8c]: https://github.com/rust-lang/rust/pull/31530
2648 [1.8cc]: https://github.com/rust-lang/cargo/pull/2397
2649 [1.8ce]: https://github.com/rust-lang/cargo/pull/2398
2650 [1.8cf]: https://github.com/rust-lang/rust/pull/31278
2651 [1.8cfg]: https://github.com/rust-lang/cargo/pull/2328
2652 [1.8ci]: https://github.com/rust-lang/cargo/pull/2081
2653 [1.8ck]: https://github.com/rust-lang/cargo/pull/2370
2654 [1.8ct]: https://github.com/rust-lang/cargo/pull/2335
2655 [1.8cu]: https://github.com/rust-lang/rust/pull/31390
2656 [1.8cv]: https://github.com/rust-lang/cargo/issues/2365
2657 [1.8cv]: https://github.com/rust-lang/rust/pull/30998
2658 [1.8h]: https://github.com/rust-lang/rust/pull/31460
2659 [1.8l]: https://github.com/rust-lang/rust/pull/31668
2660 [1.8m]: https://github.com/rust-lang/rust/pull/31020
2661 [1.8mf]: https://github.com/rust-lang/rust/pull/31534
2662 [1.8mp]: https://github.com/rust-lang/rust/pull/30894
2663 [1.8mr]: https://users.rust-lang.org/t/multirust-0-8-with-cross-std-installation/4901
2664 [1.8ms]: https://github.com/rust-lang/rust/pull/30448
2665 [1.8n]: https://github.com/rust-lang/rust/pull/31056
2666 [1.8nx]: https://github.com/rust-lang/rust/pull/30859
2667 [1.8r]: https://github.com/rust-lang/rust/pull/31551
2668 [1.8so]: https://github.com/rust-lang/rust/pull/31333
2669 [1.8st]: https://github.com/rust-lang/rust/pull/29520
2670 [1.8t]: https://github.com/rust-lang/rust/pull/31358
2671 [1.8tn]: https://github.com/rust-lang/rust/pull/30882
2672 [1.8u]: https://github.com/rust-lang/rust/pull/31793
2673 [1.8v]: https://github.com/rust-lang/rust/pull/31757
2674 [1.8w]: https://github.com/rust-lang/rust/pull/31904
2675 [RFC 1361]: https://github.com/rust-lang/rfcs/blob/master/text/1361-cargo-cfg-dependencies.md
2676 [RFC 1415]: https://github.com/rust-lang/rfcs/blob/master/text/1415-trim-std-os.md
2677 [RFC 218]: https://github.com/rust-lang/rfcs/blob/master/text/0218-empty-struct-with-braces.md
2678 [RFC 953]: https://github.com/rust-lang/rfcs/blob/master/text/0953-op-assign.md
2679 [`AddAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.AddAssign.html
2680 [`BitAndAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitAndAssign.html
2681 [`BitOrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitOrAssign.html
2682 [`BitXorAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitXorAssign.html
2683 [`DivAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.DivAssign.html
2684 [`Instant::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.duration_since
2685 [`Instant::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.elapsed
2686 [`Instant::now`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.now
2687 [`MulAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.MulAssign.html
2688 [`Ref::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.Ref.html#method.map
2689 [`RefMut::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.RefMut.html#method.map
2690 [`RemAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.RemAssign.html
2691 [`ShlAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShlAssign.html
2692 [`ShrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShrAssign.html
2693 [`SubAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.SubAssign.html
2694 [`SystemTime::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.duration_since
2695 [`SystemTime::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.elapsed
2696 [`SystemTime::now`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.now
2697 [`SystemTimeError::duration`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html#method.duration
2698 [`SystemTimeError`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html
2699 [`UNIX_EPOCH`]: http://doc.rust-lang.org/nightly/std/time/constant.UNIX_EPOCH.html
2700 [`ptr::drop_in_place`]: http://doc.rust-lang.org/nightly/std/ptr/fn.drop_in_place.html
2701 [`str::EncodeUtf16`]: http://doc.rust-lang.org/nightly/std/str/struct.EncodeUtf16.html
2702 [`str::encode_utf16`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.encode_utf16
2703 [`time::Instant`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html
2704 [`time::SystemTime`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html
2707 Version 1.7.0 (2016-03-03)
2708 ==========================
2715 * [`Path::strip_prefix`][] (renamed from relative_from)
2716 * [`path::StripPrefixError`][] (new error type returned from strip_prefix)
2718 * [`Ipv4Addr::is_loopback`]
2719 * [`Ipv4Addr::is_private`]
2720 * [`Ipv4Addr::is_link_local`]
2721 * [`Ipv4Addr::is_multicast`]
2722 * [`Ipv4Addr::is_broadcast`]
2723 * [`Ipv4Addr::is_documentation`]
2725 * [`Ipv6Addr::is_unspecified`]
2726 * [`Ipv6Addr::is_loopback`]
2727 * [`Ipv6Addr::is_multicast`]
2730 * [`Vec::as_mut_slice`]
2732 * [`String::as_str`]
2733 * [`String::as_mut_str`]
2735 * `<[T]>::`[`clone_from_slice`], which now requires the two slices to
2737 * `<[T]>::`[`sort_by_key`]
2738 * checked, saturated, and overflowing operations
2739 * [`i32::checked_rem`], [`i32::checked_neg`], [`i32::checked_shl`], [`i32::checked_shr`]
2740 * [`i32::saturating_mul`]
2741 * [`i32::overflowing_add`], [`i32::overflowing_sub`], [`i32::overflowing_mul`], [`i32::overflowing_div`]
2742 * [`i32::overflowing_rem`], [`i32::overflowing_neg`], [`i32::overflowing_shl`], [`i32::overflowing_shr`]
2743 * [`u32::checked_rem`], [`u32::checked_neg`], [`u32::checked_shl`], [`u32::checked_shl`]
2744 * [`u32::saturating_mul`]
2745 * [`u32::overflowing_add`], [`u32::overflowing_sub`], [`u32::overflowing_mul`], [`u32::overflowing_div`]
2746 * [`u32::overflowing_rem`], [`u32::overflowing_neg`], [`u32::overflowing_shl`], [`u32::overflowing_shr`]
2747 * and checked, saturated, and overflowing operations for other primitive types
2749 * [`ffi::IntoStringError`]
2750 * [`CString::into_string`]
2751 * [`CString::into_bytes`]
2752 * [`CString::into_bytes_with_nul`]
2753 * `From<CString> for Vec<u8>`
2755 * [`IntoStringError::into_cstring`]
2756 * [`IntoStringError::utf8_error`]
2757 * `Error for IntoStringError`
2759 * [`std::hash::BuildHasher`]
2760 * [`BuildHasher::Hasher`]
2761 * [`BuildHasher::build_hasher`]
2762 * [`std::hash::BuildHasherDefault`]
2763 * [`HashMap::with_hasher`]
2764 * [`HashMap::with_capacity_and_hasher`]
2765 * [`HashSet::with_hasher`]
2766 * [`HashSet::with_capacity_and_hasher`]
2767 * [`std::collections::hash_map::RandomState`]
2768 * [`RandomState::new`]
2769 * [Validating UTF-8 is faster by a factor of between 7 and 14x for
2770 ASCII input][1.7utf8]. This means that creating `String`s and `str`s
2771 from bytes is faster.
2772 * [The performance of `LineWriter` (and thus `io::stdout`) was
2773 improved by using `memchr` to search for newlines][1.7m].
2774 * [`f32::to_degrees` and `f32::to_radians` are stable][1.7f]. The
2775 `f64` variants were stabilized previously.
2776 * [`BTreeMap` was rewritten to use less memory and improve the performance
2777 of insertion and iteration, the latter by as much as 5x][1.7bm].
2778 * [`BTreeSet` and its iterators, `Iter`, `IntoIter`, and `Range` are
2779 covariant over their contained type][1.7bt].
2780 * [`LinkedList` and its iterators, `Iter` and `IntoIter` are covariant
2781 over their contained type][1.7ll].
2782 * [`str::replace` now accepts a `Pattern`][1.7rp], like other string
2784 * [`Any` is implemented for unsized types][1.7a].
2785 * [`Hash` is implemented for `Duration`][1.7h].
2790 * [When running tests with `--test`, rustdoc will pass `--cfg`
2791 arguments to the compiler][1.7dt].
2792 * [The compiler is built with RPATH information by default][1.7rpa].
2793 This means that it will be possible to run `rustc` when installed in
2794 unusual configurations without configuring the dynamic linker search
2796 * [`rustc` passes `--enable-new-dtags` to GNU ld][1.7dta]. This makes
2797 any RPATH entries (emitted with `-C rpath`) *not* take precedence
2798 over `LD_LIBRARY_PATH`.
2803 * [`cargo rustc` accepts a `--profile` flag that runs `rustc` under
2804 any of the compilation profiles, 'dev', 'bench', or 'test'][1.7cp].
2805 * [The `rerun-if-changed` build script directive no longer causes the
2806 build script to incorrectly run twice in certain scenarios][1.7rr].
2811 * Soundness fixes to the interactions between associated types and
2812 lifetimes, specified in [RFC 1214], [now generate errors][1.7sf] for
2813 code that violates the new rules. This is a significant change that
2814 is known to break existing code, so it has emitted warnings for the
2815 new error cases since 1.4 to give crate authors time to adapt. The
2816 details of what is changing are subtle; read the RFC for more.
2817 * [Several bugs in the compiler's visibility calculations were
2818 fixed][1.7v]. Since this was found to break significant amounts of
2819 code, the new errors will be emitted as warnings for several release
2820 cycles, under the `private_in_public` lint.
2821 * Defaulted type parameters were accidentally accepted in positions
2822 that were not intended. In this release, [defaulted type parameters
2823 appearing outside of type definitions will generate a
2824 warning][1.7d], which will become an error in future releases.
2825 * [Parsing "." as a float results in an error instead of 0][1.7p].
2826 That is, `".".parse::<f32>()` returns `Err`, not `Ok(0.0)`.
2827 * [Borrows of closure parameters may not outlive the closure][1.7bc].
2829 [1.7a]: https://github.com/rust-lang/rust/pull/30928
2830 [1.7bc]: https://github.com/rust-lang/rust/pull/30341
2831 [1.7bm]: https://github.com/rust-lang/rust/pull/30426
2832 [1.7bt]: https://github.com/rust-lang/rust/pull/30998
2833 [1.7cp]: https://github.com/rust-lang/cargo/pull/2224
2834 [1.7d]: https://github.com/rust-lang/rust/pull/30724
2835 [1.7dt]: https://github.com/rust-lang/rust/pull/30372
2836 [1.7dta]: https://github.com/rust-lang/rust/pull/30394
2837 [1.7f]: https://github.com/rust-lang/rust/pull/30672
2838 [1.7h]: https://github.com/rust-lang/rust/pull/30818
2839 [1.7ll]: https://github.com/rust-lang/rust/pull/30663
2840 [1.7m]: https://github.com/rust-lang/rust/pull/30381
2841 [1.7p]: https://github.com/rust-lang/rust/pull/30681
2842 [1.7rp]: https://github.com/rust-lang/rust/pull/29498
2843 [1.7rpa]: https://github.com/rust-lang/rust/pull/30353
2844 [1.7rr]: https://github.com/rust-lang/cargo/pull/2279
2845 [1.7sf]: https://github.com/rust-lang/rust/pull/30389
2846 [1.7utf8]: https://github.com/rust-lang/rust/pull/30740
2847 [1.7v]: https://github.com/rust-lang/rust/pull/29973
2848 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
2849 [`BuildHasher::Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
2850 [`BuildHasher::build_hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html#tymethod.build_hasher
2851 [`CString::into_bytes_with_nul`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes_with_nul
2852 [`CString::into_bytes`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes
2853 [`CString::into_string`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_string
2854 [`HashMap::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_capacity_and_hasher
2855 [`HashMap::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_hasher
2856 [`HashSet::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_capacity_and_hasher
2857 [`HashSet::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_hasher
2858 [`IntoStringError::into_cstring`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.into_cstring
2859 [`IntoStringError::utf8_error`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.utf8_error
2860 [`Ipv4Addr::is_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_broadcast
2861 [`Ipv4Addr::is_documentation`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_documentation
2862 [`Ipv4Addr::is_link_local`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_link_local
2863 [`Ipv4Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_loopback
2864 [`Ipv4Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_multicast
2865 [`Ipv4Addr::is_private`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_private
2866 [`Ipv6Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_loopback
2867 [`Ipv6Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_multicast
2868 [`Ipv6Addr::is_unspecified`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_unspecified
2869 [`Path::strip_prefix`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.strip_prefix
2870 [`RandomState::new`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html#method.new
2871 [`String::as_mut_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_mut_str
2872 [`String::as_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_str
2873 [`Vec::as_mut_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_mut_slice
2874 [`Vec::as_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_slice
2875 [`clone_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.clone_from_slice
2876 [`ffi::IntoStringError`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html
2877 [`i32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_neg
2878 [`i32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_rem
2879 [`i32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shl
2880 [`i32::checked_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shr
2881 [`i32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_add
2882 [`i32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_div
2883 [`i32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_mul
2884 [`i32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_neg
2885 [`i32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_rem
2886 [`i32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shl
2887 [`i32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shr
2888 [`i32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_sub
2889 [`i32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.saturating_mul
2890 [`path::StripPrefixError`]: http://doc.rust-lang.org/nightly/std/path/struct.StripPrefixError.html
2891 [`sort_by_key`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.sort_by_key
2892 [`std::collections::hash_map::RandomState`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html
2893 [`std::hash::BuildHasherDefault`]: http://doc.rust-lang.org/nightly/std/hash/struct.BuildHasherDefault.html
2894 [`std::hash::BuildHasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html
2895 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
2896 [`u32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_rem
2897 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
2898 [`u32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_shl
2899 [`u32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_add
2900 [`u32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_div
2901 [`u32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_mul
2902 [`u32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_neg
2903 [`u32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_rem
2904 [`u32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shl
2905 [`u32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shr
2906 [`u32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_sub
2907 [`u32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.saturating_mul
2910 Version 1.6.0 (2016-01-21)
2911 ==========================
2916 * The `#![no_std]` attribute causes a crate to not be linked to the
2917 standard library, but only the [core library][1.6co], as described
2918 in [RFC 1184]. The core library defines common types and traits but
2919 has no platform dependencies whatsoever, and is the basis for Rust
2920 software in environments that cannot support a full port of the
2921 standard library, such as operating systems. Most of the core
2922 library is now stable.
2928 [`Read::read_exact`],
2929 [`ErrorKind::UnexpectedEof`][] (renamed from `UnexpectedEOF`),
2930 [`fs::DirBuilder`], [`fs::DirBuilder::new`],
2931 [`fs::DirBuilder::recursive`], [`fs::DirBuilder::create`],
2932 [`os::unix::fs::DirBuilderExt`],
2933 [`os::unix::fs::DirBuilderExt::mode`], [`vec::Drain`],
2934 [`vec::Vec::drain`], [`string::Drain`], [`string::String::drain`],
2935 [`vec_deque::Drain`], [`vec_deque::VecDeque::drain`],
2936 [`collections::hash_map::Drain`],
2937 [`collections::hash_map::HashMap::drain`],
2938 [`collections::hash_set::Drain`],
2939 [`collections::hash_set::HashSet::drain`],
2940 [`collections::binary_heap::Drain`],
2941 [`collections::binary_heap::BinaryHeap::drain`],
2942 [`Vec::extend_from_slice`][] (renamed from `push_all`),
2943 [`Mutex::get_mut`], [`Mutex::into_inner`], [`RwLock::get_mut`],
2944 [`RwLock::into_inner`],
2945 [`Iterator::min_by_key`][] (renamed from `min_by`),
2946 [`Iterator::max_by_key`][] (renamed from `max_by`).
2947 * The [core library][1.6co] is stable, as are most of its APIs.
2948 * [The `assert_eq!` macro supports arguments that don't implement
2949 `Sized`][1.6ae], such as arrays. In this way it behaves more like
2951 * Several timer functions that take duration in milliseconds [are
2952 deprecated in favor of those that take `Duration`][1.6ms]. These
2953 include `Condvar::wait_timeout_ms`, `thread::sleep_ms`, and
2954 `thread::park_timeout_ms`.
2955 * The algorithm by which `Vec` reserves additional elements was
2956 [tweaked to not allocate excessive space][1.6a] while still growing
2958 * `From` conversions are [implemented from integers to floats][1.6f]
2959 in cases where the conversion is lossless. Thus they are not
2960 implemented for 32-bit ints to `f32`, nor for 64-bit ints to `f32`
2961 or `f64`. They are also not implemented for `isize` and `usize`
2962 because the implementations would be platform-specific. `From` is
2963 also implemented from `f32` to `f64`.
2964 * `From<&Path>` and `From<PathBuf>` are implemented for `Cow<Path>`.
2965 * `From<T>` is implemented for `Box<T>`, `Rc<T>` and `Arc<T>`.
2966 * `IntoIterator` is implemented for `&PathBuf` and `&Path`.
2967 * [`BinaryHeap` was refactored][1.6bh] for modest performance
2969 * Sorting slices that are already sorted [is 50% faster in some
2975 * Cargo will look in `$CARGO_HOME/bin` for subcommands [by default][1.6c].
2976 * Cargo build scripts can specify their dependencies by emitting the
2977 [`rerun-if-changed`][1.6rr] key.
2978 * crates.io will reject publication of crates with dependencies that
2979 have a wildcard version constraint. Crates with wildcard
2980 dependencies were seen to cause a variety of problems, as described
2981 in [RFC 1241]. Since 1.5 publication of such crates has emitted a
2983 * `cargo clean` [accepts a `--release` flag][1.6cc] to clean the
2984 release folder. A variety of artifacts that Cargo failed to clean
2985 are now correctly deleted.
2990 * The `unreachable_code` lint [warns when a function call's argument
2992 * The parser indicates [failures that may be caused by
2993 confusingly-similar Unicode characters][1.6uc]
2994 * Certain macro errors [are reported at definition time][1.6m], not
3000 * The compiler no longer makes use of the [`RUST_PATH`][1.6rp]
3001 environment variable when locating crates. This was a pre-cargo
3002 feature for integrating with the package manager that was
3003 accidentally never removed.
3004 * [A number of bugs were fixed in the privacy checker][1.6p] that
3005 could cause previously-accepted code to break.
3006 * [Modules and unit/tuple structs may not share the same name][1.6ts].
3007 * [Bugs in pattern matching unit structs were fixed][1.6us]. The tuple
3008 struct pattern syntax (`Foo(..)`) can no longer be used to match
3009 unit structs. This is a warning now, but will become an error in
3010 future releases. Patterns that share the same name as a const are
3012 * A bug was fixed that causes [rustc not to apply default type
3013 parameters][1.6xc] when resolving certain method implementations of
3014 traits defined in other crates.
3016 [1.6a]: https://github.com/rust-lang/rust/pull/29454
3017 [1.6ae]: https://github.com/rust-lang/rust/pull/29770
3018 [1.6bh]: https://github.com/rust-lang/rust/pull/29811
3019 [1.6c]: https://github.com/rust-lang/cargo/pull/2192
3020 [1.6cc]: https://github.com/rust-lang/cargo/pull/2131
3021 [1.6co]: http://doc.rust-lang.org/beta/core/index.html
3022 [1.6dv]: https://github.com/rust-lang/rust/pull/30000
3023 [1.6f]: https://github.com/rust-lang/rust/pull/29129
3024 [1.6m]: https://github.com/rust-lang/rust/pull/29828
3025 [1.6ms]: https://github.com/rust-lang/rust/pull/29604
3026 [1.6p]: https://github.com/rust-lang/rust/pull/29726
3027 [1.6rp]: https://github.com/rust-lang/rust/pull/30034
3028 [1.6rr]: https://github.com/rust-lang/cargo/pull/2134
3029 [1.6s]: https://github.com/rust-lang/rust/pull/29675
3030 [1.6ts]: https://github.com/rust-lang/rust/issues/21546
3031 [1.6uc]: https://github.com/rust-lang/rust/pull/29837
3032 [1.6us]: https://github.com/rust-lang/rust/pull/29383
3033 [1.6xc]: https://github.com/rust-lang/rust/issues/30123
3034 [RFC 1184]: https://github.com/rust-lang/rfcs/blob/master/text/1184-stabilize-no_std.md
3035 [RFC 1241]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
3036 [`ErrorKind::UnexpectedEof`]: http://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html#variant.UnexpectedEof
3037 [`Iterator::max_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.max_by_key
3038 [`Iterator::min_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.min_by_key
3039 [`Mutex::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.get_mut
3040 [`Mutex::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.into_inner
3041 [`Read::read_exact`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_exact
3042 [`RwLock::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.get_mut
3043 [`RwLock::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.into_inner
3044 [`Vec::extend_from_slice`]: http://doc.rust-lang.org/nightly/collections/vec/struct.Vec.html#method.extend_from_slice
3045 [`collections::binary_heap::BinaryHeap::drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.BinaryHeap.html#method.drain
3046 [`collections::binary_heap::Drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.Drain.html
3047 [`collections::hash_map::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.Drain.html
3048 [`collections::hash_map::HashMap::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.HashMap.html#method.drain
3049 [`collections::hash_set::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.Drain.html
3050 [`collections::hash_set::HashSet::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.HashSet.html#method.drain
3051 [`fs::DirBuilder::create`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.create
3052 [`fs::DirBuilder::new`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.new
3053 [`fs::DirBuilder::recursive`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.recursive
3054 [`fs::DirBuilder`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html
3055 [`os::unix::fs::DirBuilderExt::mode`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html#tymethod.mode
3056 [`os::unix::fs::DirBuilderExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html
3057 [`string::Drain`]: http://doc.rust-lang.org/nightly/std/string/struct.Drain.html
3058 [`string::String::drain`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.drain
3059 [`vec::Drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Drain.html
3060 [`vec::Vec::drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.drain
3061 [`vec_deque::Drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.Drain.html
3062 [`vec_deque::VecDeque::drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.VecDeque.html#method.drain
3065 Version 1.5.0 (2015-12-10)
3066 ==========================
3068 * ~700 changes, numerous bugfixes
3074 [`BinaryHeap::from`], [`BinaryHeap::into_sorted_vec`],
3075 [`BinaryHeap::into_vec`], [`Condvar::wait_timeout`],
3076 [`FileTypeExt::is_block_device`], [`FileTypeExt::is_char_device`],
3077 [`FileTypeExt::is_fifo`], [`FileTypeExt::is_socket`],
3078 [`FileTypeExt`], [`Formatter::alternate`], [`Formatter::fill`],
3079 [`Formatter::precision`], [`Formatter::sign_aware_zero_pad`],
3080 [`Formatter::sign_minus`], [`Formatter::sign_plus`],
3081 [`Formatter::width`], [`Iterator::cmp`], [`Iterator::eq`],
3082 [`Iterator::ge`], [`Iterator::gt`], [`Iterator::le`],
3083 [`Iterator::lt`], [`Iterator::ne`], [`Iterator::partial_cmp`],
3084 [`Path::canonicalize`], [`Path::exists`], [`Path::is_dir`],
3085 [`Path::is_file`], [`Path::metadata`], [`Path::read_dir`],
3086 [`Path::read_link`], [`Path::symlink_metadata`],
3087 [`Utf8Error::valid_up_to`], [`Vec::resize`],
3088 [`VecDeque::as_mut_slices`], [`VecDeque::as_slices`],
3089 [`VecDeque::insert`], [`VecDeque::shrink_to_fit`],
3090 [`VecDeque::swap_remove_back`], [`VecDeque::swap_remove_front`],
3091 [`slice::split_first_mut`], [`slice::split_first`],
3092 [`slice::split_last_mut`], [`slice::split_last`],
3093 [`char::from_u32_unchecked`], [`fs::canonicalize`],
3094 [`str::MatchIndices`], [`str::RMatchIndices`],
3095 [`str::match_indices`], [`str::rmatch_indices`],
3096 [`str::slice_mut_unchecked`], [`string::ParseError`].
3097 * Rust applications hosted on crates.io can be installed locally to
3098 `~/.cargo/bin` with the [`cargo install`] command. Among other
3099 things this makes it easier to augment Cargo with new subcommands:
3100 when a binary named e.g. `cargo-foo` is found in `$PATH` it can be
3101 invoked as `cargo foo`.
3102 * Crates with wildcard (`*`) dependencies will [emit warnings when
3103 published][1.5w]. In 1.6 it will no longer be possible to publish
3104 crates with wildcard dependencies.
3109 * The rules determining when a particular lifetime must outlive
3110 a particular value (known as '[dropck]') have been [modified
3111 to not rely on parametricity][1.5p].
3112 * [Implementations of `AsRef` and `AsMut` were added to `Box`, `Rc`,
3113 and `Arc`][1.5a]. Because these smart pointer types implement
3114 `Deref`, this causes breakage in cases where the interior type
3115 contains methods of the same name.
3116 * [Correct a bug in Rc/Arc][1.5c] that caused [dropck] to be unaware
3117 that they could drop their content. Soundness fix.
3118 * All method invocations are [properly checked][1.5wf1] for
3119 [well-formedness][1.5wf2]. Soundness fix.
3120 * Traits whose supertraits contain `Self` are [not object
3121 safe][1.5o]. Soundness fix.
3122 * Target specifications support a [`no_default_libraries`][1.5nd]
3123 setting that controls whether `-nodefaultlibs` is passed to the
3124 linker, and in turn the `is_like_windows` setting no longer affects
3125 the `-nodefaultlibs` flag.
3126 * `#[derive(Show)]`, long-deprecated, [has been removed][1.5ds].
3127 * The `#[inline]` and `#[repr]` attributes [can only appear
3128 in valid locations][1.5at].
3129 * Native libraries linked from the local crate are [passed to
3130 the linker before native libraries from upstream crates][1.5nl].
3131 * Two rarely-used attributes, `#[no_debug]` and
3132 `#[omit_gdb_pretty_printer_section]` [are feature gated][1.5fg].
3133 * Negation of unsigned integers, which has been a warning for
3134 several releases, [is now behind a feature gate and will
3135 generate errors][1.5nu].
3136 * The parser accidentally accepted visibility modifiers on
3137 enum variants, a bug [which has been fixed][1.5ev].
3138 * [A bug was fixed that allowed `use` statements to import unstable
3144 * When evaluating expressions at compile-time that are not
3145 compile-time constants (const-evaluating expressions in non-const
3146 contexts), incorrect code such as overlong bitshifts and arithmetic
3147 overflow will [generate a warning instead of an error][1.5ce],
3148 delaying the error until runtime. This will allow the
3149 const-evaluator to be expanded in the future backwards-compatibly.
3150 * The `improper_ctypes` lint [no longer warns about using `isize` and
3151 `usize` in FFI][1.5ict].
3156 * `Arc<T>` and `Rc<T>` are [covariant with respect to `T` instead of
3158 * `Default` is [implemented for mutable slices][1.5d].
3159 * `FromStr` is [implemented for `SockAddrV4` and `SockAddrV6`][1.5s].
3160 * There are now `From` conversions [between floating point
3161 types][1.5f] where the conversions are lossless.
3162 * Thera are now `From` conversions [between integer types][1.5i] where
3163 the conversions are lossless.
3164 * [`fs::Metadata` implements `Clone`][1.5fs].
3165 * The `parse` method [accepts a leading "+" when parsing
3167 * [`AsMut` is implemented for `Vec`][1.5am].
3168 * The `clone_from` implementations for `String` and `BinaryHeap` [have
3169 been optimized][1.5cf] and no longer rely on the default impl.
3170 * The `extern "Rust"`, `extern "C"`, `unsafe extern "Rust"` and
3171 `unsafe extern "C"` function types now [implement `Clone`,
3172 `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and
3173 `fmt::Debug` for up to 12 arguments][1.5fp].
3174 * [Dropping `Vec`s is much faster in unoptimized builds when the
3175 element types don't implement `Drop`][1.5dv].
3176 * A bug that caused in incorrect behavior when [combining `VecDeque`
3177 with zero-sized types][1.5vdz] was resolved.
3178 * [`PartialOrd` for slices is faster][1.5po].
3183 * [Crate metadata size was reduced by 20%][1.5md].
3184 * [Improvements to code generation reduced the size of libcore by 3.3
3185 MB and rustc's memory usage by 18MB][1.5m].
3186 * [Improvements to deref translation increased performance in
3187 unoptimized builds][1.5dr].
3188 * Various errors in trait resolution [are deduplicated to only be
3189 reported once][1.5te].
3190 * Rust has preliminary [support for rumprun kernels][1.5rr].
3191 * Rust has preliminary [support for NetBSD on amd64][1.5na].
3193 [1.5use]: https://github.com/rust-lang/rust/pull/28364
3194 [1.5po]: https://github.com/rust-lang/rust/pull/28436
3195 [1.5ev]: https://github.com/rust-lang/rust/pull/28442
3196 [1.5nu]: https://github.com/rust-lang/rust/pull/28468
3197 [1.5dr]: https://github.com/rust-lang/rust/pull/28491
3198 [1.5vdz]: https://github.com/rust-lang/rust/pull/28494
3199 [1.5md]: https://github.com/rust-lang/rust/pull/28521
3200 [1.5fg]: https://github.com/rust-lang/rust/pull/28522
3201 [1.5dv]: https://github.com/rust-lang/rust/pull/28531
3202 [1.5na]: https://github.com/rust-lang/rust/pull/28543
3203 [1.5fp]: https://github.com/rust-lang/rust/pull/28560
3204 [1.5rr]: https://github.com/rust-lang/rust/pull/28593
3205 [1.5cf]: https://github.com/rust-lang/rust/pull/28602
3206 [1.5nl]: https://github.com/rust-lang/rust/pull/28605
3207 [1.5te]: https://github.com/rust-lang/rust/pull/28645
3208 [1.5at]: https://github.com/rust-lang/rust/pull/28650
3209 [1.5am]: https://github.com/rust-lang/rust/pull/28663
3210 [1.5m]: https://github.com/rust-lang/rust/pull/28778
3211 [1.5ict]: https://github.com/rust-lang/rust/pull/28779
3212 [1.5a]: https://github.com/rust-lang/rust/pull/28811
3213 [1.5pi]: https://github.com/rust-lang/rust/pull/28826
3214 [1.5ce]: https://github.com/rust-lang/rfcs/blob/master/text/1229-compile-time-asserts.md
3215 [1.5p]: https://github.com/rust-lang/rfcs/blob/master/text/1238-nonparametric-dropck.md
3216 [1.5i]: https://github.com/rust-lang/rust/pull/28921
3217 [1.5fs]: https://github.com/rust-lang/rust/pull/29021
3218 [1.5f]: https://github.com/rust-lang/rust/pull/29129
3219 [1.5ds]: https://github.com/rust-lang/rust/pull/29148
3220 [1.5s]: https://github.com/rust-lang/rust/pull/29190
3221 [1.5d]: https://github.com/rust-lang/rust/pull/29245
3222 [1.5o]: https://github.com/rust-lang/rust/pull/29259
3223 [1.5nd]: https://github.com/rust-lang/rust/pull/28578
3224 [1.5wf2]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
3225 [1.5wf1]: https://github.com/rust-lang/rust/pull/28669
3226 [dropck]: https://doc.rust-lang.org/nightly/nomicon/dropck.html
3227 [1.5c]: https://github.com/rust-lang/rust/pull/29110
3228 [1.5w]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
3229 [`cargo install`]: https://github.com/rust-lang/rfcs/blob/master/text/1200-cargo-install.md
3230 [`BinaryHeap::from`]: http://doc.rust-lang.org/nightly/std/convert/trait.From.html#method.from
3231 [`BinaryHeap::into_sorted_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_sorted_vec
3232 [`BinaryHeap::into_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_vec
3233 [`Condvar::wait_timeout`]: http://doc.rust-lang.org/nightly/std/sync/struct.Condvar.html#method.wait_timeout
3234 [`FileTypeExt::is_block_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_block_device
3235 [`FileTypeExt::is_char_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_char_device
3236 [`FileTypeExt::is_fifo`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_fifo
3237 [`FileTypeExt::is_socket`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_socket
3238 [`FileTypeExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html
3239 [`Formatter::alternate`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.alternate
3240 [`Formatter::fill`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.fill
3241 [`Formatter::precision`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.precision
3242 [`Formatter::sign_aware_zero_pad`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_aware_zero_pad
3243 [`Formatter::sign_minus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_minus
3244 [`Formatter::sign_plus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_plus
3245 [`Formatter::width`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.width
3246 [`Iterator::cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.cmp
3247 [`Iterator::eq`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.eq
3248 [`Iterator::ge`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ge
3249 [`Iterator::gt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.gt
3250 [`Iterator::le`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.le
3251 [`Iterator::lt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.lt
3252 [`Iterator::ne`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ne
3253 [`Iterator::partial_cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.partial_cmp
3254 [`Path::canonicalize`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.canonicalize
3255 [`Path::exists`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.exists
3256 [`Path::is_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_dir
3257 [`Path::is_file`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_file
3258 [`Path::metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.metadata
3259 [`Path::read_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_dir
3260 [`Path::read_link`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_link
3261 [`Path::symlink_metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.symlink_metadata
3262 [`Utf8Error::valid_up_to`]: http://doc.rust-lang.org/nightly/core/str/struct.Utf8Error.html#method.valid_up_to
3263 [`Vec::resize`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.resize
3264 [`VecDeque::as_mut_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_mut_slices
3265 [`VecDeque::as_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_slices
3266 [`VecDeque::insert`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.insert
3267 [`VecDeque::shrink_to_fit`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.shrink_to_fit
3268 [`VecDeque::swap_remove_back`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_back
3269 [`VecDeque::swap_remove_front`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_front
3270 [`slice::split_first_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first_mut
3271 [`slice::split_first`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first
3272 [`slice::split_last_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last_mut
3273 [`slice::split_last`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last
3274 [`char::from_u32_unchecked`]: http://doc.rust-lang.org/nightly/std/char/fn.from_u32_unchecked.html
3275 [`fs::canonicalize`]: http://doc.rust-lang.org/nightly/std/fs/fn.canonicalize.html
3276 [`str::MatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.MatchIndices.html
3277 [`str::RMatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.RMatchIndices.html
3278 [`str::match_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.match_indices
3279 [`str::rmatch_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatch_indices
3280 [`str::slice_mut_unchecked`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.slice_mut_unchecked
3281 [`string::ParseError`]: http://doc.rust-lang.org/nightly/std/string/enum.ParseError.html
3283 Version 1.4.0 (2015-10-29)
3284 ==========================
3286 * ~1200 changes, numerous bugfixes
3291 * Windows builds targeting the 64-bit MSVC ABI and linker (instead of
3292 GNU) are now supported and recommended for use.
3297 * [Several changes have been made to fix type soundness and improve
3298 the behavior of associated types][sound]. See [RFC 1214]. Although
3299 we have mostly introduced these changes as warnings this release, to
3300 become errors next release, there are still some scenarios that will
3301 see immediate breakage.
3302 * [The `str::lines` and `BufRead::lines` iterators treat `\r\n` as
3303 line breaks in addition to `\n`][crlf].
3304 * [Loans of `'static` lifetime extend to the end of a function][stat].
3305 * [`str::parse` no longer introduces avoidable rounding error when
3306 parsing floating point numbers. Together with earlier changes to
3307 float formatting/output, "round trips" like f.to_string().parse()
3308 now preserve the value of f exactly. Additionally, leading plus
3309 signs are now accepted][fp3].
3315 * `use` statements that import multiple items [can now rename
3316 them][i], as in `use foo::{bar as kitten, baz as puppy}`.
3317 * [Binops work correctly on fat pointers][binfat].
3318 * `pub extern crate`, which does not behave as expected, [issues a
3319 warning][pec] until a better solution is found.
3324 * [Many APIs were stabilized][stab]: `<Box<str>>::into_string`,
3325 [`Arc::downgrade`], [`Arc::get_mut`], [`Arc::make_mut`],
3326 [`Arc::try_unwrap`], [`Box::from_raw`], [`Box::into_raw`], [`CStr::to_str`],
3327 [`CStr::to_string_lossy`], [`CString::from_raw`], [`CString::into_raw`],
3328 [`IntoRawFd::into_raw_fd`], [`IntoRawFd`],
3329 `IntoRawHandle::into_raw_handle`, `IntoRawHandle`,
3330 `IntoRawSocket::into_raw_socket`, `IntoRawSocket`, [`Rc::downgrade`],
3331 [`Rc::get_mut`], [`Rc::make_mut`], [`Rc::try_unwrap`], [`Result::expect`],
3332 [`String::into_boxed_str`], [`TcpStream::read_timeout`],
3333 [`TcpStream::set_read_timeout`], [`TcpStream::set_write_timeout`],
3334 [`TcpStream::write_timeout`], [`UdpSocket::read_timeout`],
3335 [`UdpSocket::set_read_timeout`], [`UdpSocket::set_write_timeout`],
3336 [`UdpSocket::write_timeout`], `Vec::append`, `Vec::split_off`,
3337 [`VecDeque::append`], [`VecDeque::retain`], [`VecDeque::split_off`],
3338 [`rc::Weak::upgrade`], [`rc::Weak`], [`slice::Iter::as_slice`],
3339 [`slice::IterMut::into_slice`], [`str::CharIndices::as_str`],
3340 [`str::Chars::as_str`], [`str::split_at_mut`], [`str::split_at`],
3341 [`sync::Weak::upgrade`], [`sync::Weak`], [`thread::park_timeout`],
3343 * [Some APIs were deprecated][dep]: `BTreeMap::with_b`,
3344 `BTreeSet::with_b`, `Option::as_mut_slice`, `Option::as_slice`,
3345 `Result::as_mut_slice`, `Result::as_slice`, `f32::from_str_radix`,
3346 `f64::from_str_radix`.
3347 * [Reverse-searching strings is faster with the 'two-way'
3349 * [`std::io::copy` allows `?Sized` arguments][cc].
3350 * The `Windows`, `Chunks`, and `ChunksMut` iterators over slices all
3351 [override `count`, `nth` and `last` with an O(1)
3352 implementation][it].
3353 * [`Default` is implemented for arrays up to `[T; 32]`][d].
3354 * [`IntoRawFd` has been added to the Unix-specific prelude,
3355 `IntoRawSocket` and `IntoRawHandle` to the Windows-specific
3357 * [`Extend<String>` and `FromIterator<String` are both implemented for
3359 * [`IntoIterator` is implemented for references to `Option` and
3361 * [`HashMap` and `HashSet` implement `Extend<&T>` where `T:
3362 Copy`][ext] as part of [RFC 839]. This will cause type inferance
3363 breakage in rare situations.
3364 * [`BinaryHeap` implements `Debug`][bh2].
3365 * [`Borrow` and `BorrowMut` are implemented for fixed-size
3367 * [`extern fn`s with the "Rust" and "C" ABIs implement common
3368 traits including `Eq`, `Ord`, `Debug`, `Hash`][fp].
3369 * [String comparison is faster][faststr].
3370 * `&mut T` where `T: std::fmt::Write` [also implements
3371 `std::fmt::Write`][mutw].
3372 * [A stable regression in `VecDeque::push_back` and other
3373 capicity-altering methods that caused panics for zero-sized types
3375 * [Function pointers implement traits for up to 12 parameters][fp2].
3380 * The compiler [no longer uses the 'morestack' feature to prevent
3381 stack overflow][mm]. Instead it uses guard pages and stack
3382 probes (though stack probes are not yet implemented on any platform
3384 * [The compiler matches traits faster when projections are involved][p].
3385 * The 'improper_ctypes' lint [no longer warns about use of `isize` and
3387 * [Cargo now displays useful information about what its doing during
3388 `cargo update`][cu].
3390 [`Arc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.downgrade
3391 [`Arc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.make_mut
3392 [`Arc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.get_mut
3393 [`Arc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.try_unwrap
3394 [`Box::from_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.from_raw
3395 [`Box::into_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.into_raw
3396 [`CStr::to_str`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_str
3397 [`CStr::to_string_lossy`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_string_lossy
3398 [`CString::from_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.from_raw
3399 [`CString::into_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_raw
3400 [`IntoRawFd::into_raw_fd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html#tymethod.into_raw_fd
3401 [`IntoRawFd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html
3402 [`Rc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.downgrade
3403 [`Rc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.get_mut
3404 [`Rc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.make_mut
3405 [`Rc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.try_unwrap
3406 [`Result::expect`]: http://doc.rust-lang.org/nightly/core/result/enum.Result.html#method.expect
3407 [`String::into_boxed_str`]: http://doc.rust-lang.org/nightly/collections/string/struct.String.html#method.into_boxed_str
3408 [`TcpStream::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
3409 [`TcpStream::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
3410 [`TcpStream::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
3411 [`TcpStream::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
3412 [`UdpSocket::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
3413 [`UdpSocket::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
3414 [`UdpSocket::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
3415 [`UdpSocket::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
3416 [`VecDeque::append`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.append
3417 [`VecDeque::retain`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.retain
3418 [`VecDeque::split_off`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.split_off
3419 [`rc::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html#method.upgrade
3420 [`rc::Weak`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html
3421 [`slice::Iter::as_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.Iter.html#method.as_slice
3422 [`slice::IterMut::into_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.IterMut.html#method.into_slice
3423 [`str::CharIndices::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.CharIndices.html#method.as_str
3424 [`str::Chars::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.Chars.html#method.as_str
3425 [`str::split_at_mut`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at_mut
3426 [`str::split_at`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at
3427 [`sync::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html#method.upgrade
3428 [`sync::Weak`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html
3429 [`thread::park_timeout`]: http://doc.rust-lang.org/nightly/std/thread/fn.park_timeout.html
3430 [`thread::sleep`]: http://doc.rust-lang.org/nightly/std/thread/fn.sleep.html
3431 [bh2]: https://github.com/rust-lang/rust/pull/28156
3432 [binfat]: https://github.com/rust-lang/rust/pull/28270
3433 [bm]: https://github.com/rust-lang/rust/pull/28197
3434 [cc]: https://github.com/rust-lang/rust/pull/27531
3435 [crlf]: https://github.com/rust-lang/rust/pull/28034
3436 [cu]: https://github.com/rust-lang/cargo/pull/1931
3437 [d]: https://github.com/rust-lang/rust/pull/27825
3438 [dep]: https://github.com/rust-lang/rust/pull/28339
3439 [es]: https://github.com/rust-lang/rust/pull/27956
3440 [ext]: https://github.com/rust-lang/rust/pull/28094
3441 [faststr]: https://github.com/rust-lang/rust/pull/28338
3442 [ffi]: https://github.com/rust-lang/rust/pull/28779
3443 [fp]: https://github.com/rust-lang/rust/pull/28268
3444 [fp2]: https://github.com/rust-lang/rust/pull/28560
3445 [fp3]: https://github.com/rust-lang/rust/pull/27307
3446 [i]: https://github.com/rust-lang/rust/pull/27451
3447 [into2]: https://github.com/rust-lang/rust/pull/28039
3448 [it]: https://github.com/rust-lang/rust/pull/27652
3449 [mm]: https://github.com/rust-lang/rust/pull/27338
3450 [mutw]: https://github.com/rust-lang/rust/pull/28368
3451 [sound]: https://github.com/rust-lang/rust/pull/27641
3452 [p]: https://github.com/rust-lang/rust/pull/27866
3453 [pec]: https://github.com/rust-lang/rust/pull/28486
3454 [pr]: https://github.com/rust-lang/rust/pull/27896
3455 [RFC 839]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
3456 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
3457 [s]: https://github.com/rust-lang/rust/pull/27474
3458 [stab]: https://github.com/rust-lang/rust/pull/28339
3459 [stat]: https://github.com/rust-lang/rust/pull/28321
3460 [vd]: https://github.com/rust-lang/rust/pull/28494
3462 Version 1.3.0 (2015-09-17)
3463 ==============================
3465 * ~900 changes, numerous bugfixes
3470 * The [new object lifetime defaults][nold] have been [turned
3471 on][nold2] after a cycle of warnings about the change. Now types
3472 like `&'a Box<Trait>` (or `&'a Rc<Trait>`, etc) will change from
3473 being interpreted as `&'a Box<Trait+'a>` to `&'a
3474 Box<Trait+'static>`.
3475 * [The Rustonomicon][nom] is a new book in the official documentation
3476 that dives into writing unsafe Rust.
3477 * The [`Duration`] API, [has been stabilized][ds]. This basic unit of
3478 timekeeping is employed by other std APIs, as well as out-of-tree
3484 * The [new object lifetime defaults][nold] have been [turned
3485 on][nold2] after a cycle of warnings about the change.
3486 * There is a known [regression][lr] in how object lifetime elision is
3487 interpreted, the proper solution for which is undetermined.
3488 * The `#[prelude_import]` attribute, an internal implementation
3489 detail, was accidentally stabilized previously. [It has been put
3490 behind the `prelude_import` feature gate][pi]. This change is
3491 believed to break no existing code.
3492 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
3493 [more sane for dynamically sized types][dst3]. Code that relied on
3494 the previous behavior is thought to be broken.
3495 * The `dropck` rules, which checks that destructors can't access
3496 destroyed values, [have been updated][dropck] to match the
3497 [RFC][dropckrfc]. This fixes some soundness holes, and as such will
3498 cause some previously-compiling code to no longer build.
3503 * The [new object lifetime defaults][nold] have been [turned
3504 on][nold2] after a cycle of warnings about the change.
3505 * Semicolons may [now follow types and paths in
3506 macros](https://github.com/rust-lang/rust/pull/27000).
3507 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
3508 [more sane for dynamically sized types][dst3]. Code that relied on
3509 the previous behavior is not known to exist, and suspected to be
3511 * `'static` variables [may now be recursive][st].
3512 * `ref` bindings choose between [`Deref`] and [`DerefMut`]
3513 implementations correctly.
3514 * The `dropck` rules, which checks that destructors can't access
3515 destroyed values, [have been updated][dropck] to match the
3521 * The [`Duration`] API, [has been stabilized][ds], as well as the
3522 `std::time` module, which presently contains only `Duration`.
3523 * `Box<str>` and `Box<[T]>` both implement `Clone`.
3524 * The owned C string, [`CString`], implements [`Borrow`] and the
3525 borrowed C string, [`CStr`], implements [`ToOwned`]. The two of
3526 these allow C strings to be borrowed and cloned in generic code.
3527 * [`CStr`] implements [`Debug`].
3528 * [`AtomicPtr`] implements [`Debug`].
3529 * [`Error`] trait objects [can be downcast to their concrete types][e]
3530 in many common configurations, using the [`is`], [`downcast`],
3531 [`downcast_ref`] and [`downcast_mut`] methods, similarly to the
3533 * Searching for substrings now [employs the two-way algorithm][search]
3534 instead of doing a naive search. This gives major speedups to a
3535 number of methods, including [`contains`][sc], [`find`][sf],
3536 [`rfind`][srf], [`split`][ss]. [`starts_with`][ssw] and
3537 [`ends_with`][sew] are also faster.
3538 * The performance of `PartialEq` for slices is [much faster][ps].
3539 * The [`Hash`] trait offers the default method, [`hash_slice`], which
3540 is overridden and optimized by the implementations for scalars.
3541 * The [`Hasher`] trait now has a number of specialized `write_*`
3542 methods for primitive types, for efficiency.
3543 * The I/O-specific error type, [`std::io::Error`][ie], gained a set of
3544 methods for accessing the 'inner error', if any: [`get_ref`][iegr],
3545 [`get_mut`][iegm], [`into_inner`][ieii]. As well, the implementation
3546 of [`std::error::Error::cause`][iec] also delegates to the inner
3548 * [`process::Child`][pc] gained the [`id`] method, which returns a
3549 `u32` representing the platform-specific process identifier.
3550 * The [`connect`] method on slices is deprecated, replaced by the new
3551 [`join`] method (note that both of these are on the *unstable*
3552 [`SliceConcatExt`] trait, but through the magic of the prelude are
3553 available to stable code anyway).
3554 * The [`Div`] operator is implemented for [`Wrapping`] types.
3555 * [`DerefMut` is implemented for `String`][dms].
3556 * Performance of SipHash (the default hasher for `HashMap`) is
3557 [better for long data][sh].
3558 * [`AtomicPtr`] implements [`Send`].
3559 * The [`read_to_end`] implementations for [`Stdin`] and [`File`]
3560 are now [specialized to use uninitalized buffers for increased
3562 * Lifetime parameters of foreign functions [are now resolved
3568 * Rust can now, with some coercion, [produce programs that run on
3569 Windows XP][xp], though XP is not considered a supported platform.
3570 * Porting Rust on Windows from the GNU toolchain to MSVC continues
3571 ([1][win1], [2][win2], [3][win3], [4][win4]). It is still not
3572 recommended for use in 1.3, though should be fully-functional
3573 in the [64-bit 1.4 beta][b14].
3574 * On Fedora-based systems installation will [properly configure the
3575 dynamic linker][fl].
3576 * The compiler gained many new extended error descriptions, which can
3577 be accessed with the `--explain` flag.
3578 * The `dropck` pass, which checks that destructors can't access
3579 destroyed values, [has been rewritten][dropck]. This fixes some
3580 soundness holes, and as such will cause some previously-compiling
3581 code to no longer build.
3582 * `rustc` now uses [LLVM to write archive files where possible][ar].
3583 Eventually this will eliminate the compiler's dependency on the ar
3585 * Rust has [preliminary support for i686 FreeBSD][fb] (it has long
3586 supported FreeBSD on x86_64).
3587 * The [`unused_mut`][lum], [`unconditional_recursion`][lur],
3588 [`improper_ctypes`][lic], and [`negate_unsigned`][lnu] lints are
3590 * If landing pads are disabled (with `-Z no-landing-pads`), [`panic!`
3591 will kill the process instead of leaking][nlp].
3593 [`Any`]: http://doc.rust-lang.org/nightly/std/any/trait.Any.html
3594 [`AtomicPtr`]: http://doc.rust-lang.org/nightly/std/sync/atomic/struct.AtomicPtr.html
3595 [`Borrow`]: http://doc.rust-lang.org/nightly/std/borrow/trait.Borrow.html
3596 [`CStr`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html
3597 [`CString`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html
3598 [`Debug`]: http://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
3599 [`DerefMut`]: http://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
3600 [`Deref`]: http://doc.rust-lang.org/nightly/std/ops/trait.Deref.html
3601 [`Div`]: http://doc.rust-lang.org/nightly/std/ops/trait.Div.html
3602 [`Duration`]: http://doc.rust-lang.org/nightly/std/time/struct.Duration.html
3603 [`Error`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html
3604 [`File`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html
3605 [`Hash`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html
3606 [`Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
3607 [`Send`]: http://doc.rust-lang.org/nightly/std/marker/trait.Send.html
3608 [`SliceConcatExt`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html
3609 [`Stdin`]: http://doc.rust-lang.org/nightly/std/io/struct.Stdin.html
3610 [`ToOwned`]: http://doc.rust-lang.org/nightly/std/borrow/trait.ToOwned.html
3611 [`Wrapping`]: http://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
3612 [`connect`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.connect
3613 [`downcast_mut`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_mut
3614 [`downcast_ref`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_ref
3615 [`downcast`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast
3616 [`hash_slice`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
3617 [`id`]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html#method.id
3618 [`is`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.is
3619 [`join`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.join
3620 [`read_to_end`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_to_end
3621 [ar]: https://github.com/rust-lang/rust/pull/26926
3622 [b14]: https://static.rust-lang.org/dist/rust-beta-x86_64-pc-windows-msvc.msi
3623 [dms]: https://github.com/rust-lang/rust/pull/26241
3624 [dropck]: https://github.com/rust-lang/rust/pull/27261
3625 [dropckrfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
3626 [ds]: https://github.com/rust-lang/rust/pull/26818
3627 [dst1]: http://doc.rust-lang.org/nightly/std/mem/fn.size_of_val.html
3628 [dst2]: http://doc.rust-lang.org/nightly/std/mem/fn.align_of_val.html
3629 [dst3]: https://github.com/rust-lang/rust/pull/27351
3630 [e]: https://github.com/rust-lang/rust/pull/24793
3631 [f]: https://github.com/rust-lang/rust/pull/26588
3632 [fb]: https://github.com/rust-lang/rust/pull/26959
3633 [fl]: https://github.com/rust-lang/rust-installer/pull/41
3634 [hs]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
3635 [ie]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html
3636 [iec]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.cause
3637 [iegm]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_mut
3638 [iegr]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_ref
3639 [ieii]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.into_inner
3640 [lic]: https://github.com/rust-lang/rust/pull/26583
3641 [lnu]: https://github.com/rust-lang/rust/pull/27026
3642 [lr]: https://github.com/rust-lang/rust/issues/27248
3643 [lum]: https://github.com/rust-lang/rust/pull/26378
3644 [lur]: https://github.com/rust-lang/rust/pull/26783
3645 [nlp]: https://github.com/rust-lang/rust/pull/27176
3646 [nold2]: https://github.com/rust-lang/rust/pull/27045
3647 [nold]: https://github.com/rust-lang/rfcs/blob/master/text/1156-adjust-default-object-bounds.md
3648 [nom]: http://doc.rust-lang.org/nightly/nomicon/
3649 [pc]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html
3650 [pi]: https://github.com/rust-lang/rust/pull/26699
3651 [ps]: https://github.com/rust-lang/rust/pull/26884
3652 [rte]: https://github.com/rust-lang/rust/pull/26950
3653 [sc]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.contains
3654 [search]: https://github.com/rust-lang/rust/pull/26327
3655 [sew]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.ends_with
3656 [sf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.find
3657 [sh]: https://github.com/rust-lang/rust/pull/27280
3658 [srf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rfind
3659 [ss]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split
3660 [ssw]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.starts_with
3661 [st]: https://github.com/rust-lang/rust/pull/26630
3662 [win1]: https://github.com/rust-lang/rust/pull/26569
3663 [win2]: https://github.com/rust-lang/rust/pull/26741
3664 [win3]: https://github.com/rust-lang/rust/pull/26741
3665 [win4]: https://github.com/rust-lang/rust/pull/27210
3666 [xp]: https://github.com/rust-lang/rust/pull/26569
3668 Version 1.2.0 (2015-08-07)
3669 ==========================
3671 * ~1200 changes, numerous bugfixes
3676 * [Dynamically-sized-type coercions][dst] allow smart pointer types
3677 like `Rc` to contain types without a fixed size, arrays and trait
3678 objects, finally enabling use of `Rc<[T]>` and completing the
3679 implementation of DST.
3680 * [Parallel codegen][parcodegen] is now working again, which can
3681 substantially speed up large builds in debug mode; It also gets
3682 another ~33% speedup when bootstrapping on a 4 core machine (using 8
3683 jobs). It's not enabled by default, but will be "in the near
3684 future". It can be activated with the `-C codegen-units=N` flag to
3686 * This is the first release with [experimental support for linking
3687 with the MSVC linker and lib C on Windows (instead of using the GNU
3688 variants via MinGW)][win]. It is yet recommended only for the most
3689 intrepid Rusticians.
3690 * Benchmark compilations are showing a 30% improvement in
3691 bootstrapping over 1.1.
3696 * The [`to_uppercase`] and [`to_lowercase`] methods on `char` now do
3697 unicode case mapping, which is a previously-planned change in
3698 behavior and considered a bugfix.
3699 * [`mem::align_of`] now specifies [the *minimum alignment* for
3700 T][align], which is usually the alignment programs are interested
3701 in, and the same value reported by clang's
3702 `alignof`. [`mem::min_align_of`] is deprecated. This is not known to
3704 * [The `#[packed]` attribute is no longer silently accepted by the
3705 compiler][packed]. This attribute did nothing and code that
3706 mentioned it likely did not work as intended.
3707 * Associated type defaults are [now behind the
3708 `associated_type_defaults` feature gate][ad]. In 1.1 associated type
3709 defaults *did not work*, but could be mentioned syntactically. As
3710 such this breakage has minimal impact.
3715 * Patterns with `ref mut` now correctly invoke [`DerefMut`] when
3716 matching against dereferencable values.
3721 * The [`Extend`] trait, which grows a collection from an iterator, is
3722 implemented over iterators of references, for `String`, `Vec`,
3723 `LinkedList`, `VecDeque`, `EnumSet`, `BinaryHeap`, `VecMap`,
3724 `BTreeSet` and `BTreeMap`. [RFC][extend-rfc].
3725 * The [`iter::once`] function returns an iterator that yields a single
3726 element, and [`iter::empty`] returns an iterator that yields no
3728 * The [`matches`] and [`rmatches`] methods on `str` return iterators
3729 over substring matches.
3730 * [`Cell`] and [`RefCell`] both implement `Eq`.
3731 * A number of methods for wrapping arithmetic are added to the
3732 integral types, [`wrapping_div`], [`wrapping_rem`],
3733 [`wrapping_neg`], [`wrapping_shl`], [`wrapping_shr`]. These are in
3734 addition to the existing [`wrapping_add`], [`wrapping_sub`], and
3735 [`wrapping_mul`] methods, and alternatives to the [`Wrapping`]
3736 type.. It is illegal for the default arithmetic operations in Rust
3737 to overflow; the desire to wrap must be explicit.
3738 * The `{:#?}` formatting specifier [displays the alternate,
3739 pretty-printed][debugfmt] form of the `Debug` formatter. This
3740 feature was actually introduced prior to 1.0 with little
3742 * [`fmt::Formatter`] implements [`fmt::Write`], a `fmt`-specific trait
3743 for writing data to formatted strings, similar to [`io::Write`].
3744 * [`fmt::Formatter`] adds 'debug builder' methods, [`debug_struct`],
3745 [`debug_tuple`], [`debug_list`], [`debug_set`], [`debug_map`]. These
3746 are used by code generators to emit implementations of [`Debug`].
3747 * `str` has new [`to_uppercase`][strup] and [`to_lowercase`][strlow]
3748 methods that convert case, following Unicode case mapping.
3749 * It is now easier to handle poisoned locks. The [`PoisonError`]
3750 type, returned by failing lock operations, exposes `into_inner`,
3751 `get_ref`, and `get_mut`, which all give access to the inner lock
3752 guard, and allow the poisoned lock to continue to operate. The
3753 `is_poisoned` method of [`RwLock`] and [`Mutex`] can poll for a
3754 poisoned lock without attempting to take the lock.
3755 * On Unix the [`FromRawFd`] trait is implemented for [`Stdio`], and
3756 [`AsRawFd`] for [`ChildStdin`], [`ChildStdout`], [`ChildStderr`].
3757 On Windows the `FromRawHandle` trait is implemented for `Stdio`,
3758 and `AsRawHandle` for `ChildStdin`, `ChildStdout`,
3760 * [`io::ErrorKind`] has a new variant, `InvalidData`, which indicates
3766 * `rustc` employs smarter heuristics for guessing at [typos].
3767 * `rustc` emits more efficient code for [no-op conversions between
3768 unsafe pointers][nop].
3769 * Fat pointers are now [passed in pairs of immediate arguments][fat],
3770 resulting in faster compile times and smaller code.
3772 [`Extend`]: https://doc.rust-lang.org/nightly/std/iter/trait.Extend.html
3773 [extend-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
3774 [`iter::once`]: https://doc.rust-lang.org/nightly/std/iter/fn.once.html
3775 [`iter::empty`]: https://doc.rust-lang.org/nightly/std/iter/fn.empty.html
3776 [`matches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.matches
3777 [`rmatches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatches
3778 [`Cell`]: https://doc.rust-lang.org/nightly/std/cell/struct.Cell.html
3779 [`RefCell`]: https://doc.rust-lang.org/nightly/std/cell/struct.RefCell.html
3780 [`wrapping_add`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_add
3781 [`wrapping_sub`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_sub
3782 [`wrapping_mul`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_mul
3783 [`wrapping_div`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_div
3784 [`wrapping_rem`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_rem
3785 [`wrapping_neg`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_neg
3786 [`wrapping_shl`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shl
3787 [`wrapping_shr`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shr
3788 [`Wrapping`]: https://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
3789 [`fmt::Formatter`]: https://doc.rust-lang.org/nightly/std/fmt/struct.Formatter.html
3790 [`fmt::Write`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Write.html
3791 [`io::Write`]: https://doc.rust-lang.org/nightly/std/io/trait.Write.html
3792 [`debug_struct`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_struct
3793 [`debug_tuple`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_tuple
3794 [`debug_list`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_list
3795 [`debug_set`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_set
3796 [`debug_map`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_map
3797 [`Debug`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
3798 [strup]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_uppercase
3799 [strlow]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_lowercase
3800 [`to_uppercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_uppercase
3801 [`to_lowercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_lowercase
3802 [`PoisonError`]: https://doc.rust-lang.org/nightly/std/sync/struct.PoisonError.html
3803 [`RwLock`]: https://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html
3804 [`Mutex`]: https://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html
3805 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
3806 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
3807 [`Stdio`]: https://doc.rust-lang.org/nightly/std/process/struct.Stdio.html
3808 [`ChildStdin`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdin.html
3809 [`ChildStdout`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdout.html
3810 [`ChildStderr`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStderr.html
3811 [`io::ErrorKind`]: https://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html
3812 [debugfmt]: https://www.reddit.com/r/rust/comments/3ceaui/psa_produces_prettyprinted_debug_output/
3813 [`DerefMut`]: https://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
3814 [`mem::align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.align_of.html
3815 [align]: https://github.com/rust-lang/rust/pull/25646
3816 [`mem::min_align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.min_align_of.html
3817 [typos]: https://github.com/rust-lang/rust/pull/26087
3818 [nop]: https://github.com/rust-lang/rust/pull/26336
3819 [fat]: https://github.com/rust-lang/rust/pull/26411
3820 [dst]: https://github.com/rust-lang/rfcs/blob/master/text/0982-dst-coercion.md
3821 [parcodegen]: https://github.com/rust-lang/rust/pull/26018
3822 [packed]: https://github.com/rust-lang/rust/pull/25541
3823 [ad]: https://github.com/rust-lang/rust/pull/27382
3824 [win]: https://github.com/rust-lang/rust/pull/25350
3826 Version 1.1.0 (2015-06-25)
3827 =========================
3829 * ~850 changes, numerous bugfixes
3834 * The [`std::fs` module has been expanded][fs] to expand the set of
3835 functionality exposed:
3836 * `DirEntry` now supports optimizations like `file_type` and `metadata` which
3837 don't incur a syscall on some platforms.
3838 * A `symlink_metadata` function has been added.
3839 * The `fs::Metadata` structure now lowers to its OS counterpart, providing
3840 access to all underlying information.
3841 * The compiler now contains extended explanations of many errors. When an error
3842 with an explanation occurs the compiler suggests using the `--explain` flag
3843 to read the explanation. Error explanations are also [available online][err-index].
3844 * Thanks to multiple [improvements][sk] to [type checking][pre], as
3845 well as other work, the time to bootstrap the compiler decreased by
3851 * The [`str::split_whitespace`] method splits a string on unicode
3852 whitespace boundaries.
3853 * On both Windows and Unix, new extension traits provide conversion of
3854 I/O types to and from the underlying system handles. On Unix, these
3855 traits are [`FromRawFd`] and [`AsRawFd`], on Windows `FromRawHandle`
3856 and `AsRawHandle`. These are implemented for `File`, `TcpStream`,
3857 `TcpListener`, and `UpdSocket`. Further implementations for
3858 `std::process` will be stabilized later.
3859 * On Unix, [`std::os::unix::symlink`] creates symlinks. On
3860 Windows, symlinks can be created with
3861 `std::os::windows::symlink_dir` and
3862 `std::os::windows::symlink_file`.
3863 * The `mpsc::Receiver` type can now be converted into an iterator with
3864 `into_iter` on the [`IntoIterator`] trait.
3865 * `Ipv4Addr` can be created from `u32` with the `From<u32>`
3866 implementation of the [`From`] trait.
3867 * The `Debug` implementation for `RangeFull` [creates output that is
3868 more consistent with other implementations][rf].
3869 * [`Debug` is implemented for `File`][file].
3870 * The `Default` implementation for `Arc` [no longer requires `Sync +
3872 * [The `Iterator` methods `count`, `nth`, and `last` have been
3873 overridden for slices to have O(1) performance instead of O(n)][si].
3874 * Incorrect handling of paths on Windows has been improved in both the
3875 compiler and the standard library.
3876 * [`AtomicPtr` gained a `Default` implementation][ap].
3877 * In accordance with Rust's policy on arithmetic overflow `abs` now
3878 [panics on overflow when debug assertions are enabled][abs].
3879 * The [`Cloned`] iterator, which was accidentally left unstable for
3880 1.0 [has been stabilized][c].
3881 * The [`Incoming`] iterator, which iterates over incoming TCP
3882 connections, and which was accidentally unnamable in 1.0, [is now
3883 properly exported][inc].
3884 * [`BinaryHeap`] no longer corrupts itself [when functions called by
3885 `sift_up` or `sift_down` panic][bh].
3886 * The [`split_off`] method of `LinkedList` [no longer corrupts
3887 the list in certain scenarios][ll].
3892 * Type checking performance [has improved notably][sk] with
3893 [multiple improvements][pre].
3894 * The compiler [suggests code changes][ch] for more errors.
3895 * rustc and it's build system have experimental support for [building
3896 toolchains against MUSL][m] instead of glibc on Linux.
3897 * The compiler defines the `target_env` cfg value, which is used for
3898 distinguishing toolchains that are otherwise for the same
3899 platform. Presently this is set to `gnu` for common GNU Linux
3900 targets and for MinGW targets, and `musl` for MUSL Linux targets.
3901 * The [`cargo rustc`][crc] command invokes a build with custom flags
3903 * [Android executables are always position independent][pie].
3904 * [The `drop_with_repr_extern` lint warns about mixing `repr(C)`
3907 [`str::split_whitespace`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_whitespace
3908 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
3909 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
3910 [`std::os::unix::symlink`]: https://doc.rust-lang.org/nightly/std/os/unix/fs/fn.symlink.html
3911 [`IntoIterator`]: https://doc.rust-lang.org/nightly/std/iter/trait.IntoIterator.html
3912 [`From`]: https://doc.rust-lang.org/nightly/std/convert/trait.From.html
3913 [rf]: https://github.com/rust-lang/rust/pull/24491
3914 [err-index]: https://doc.rust-lang.org/error-index.html
3915 [sk]: https://github.com/rust-lang/rust/pull/24615
3916 [pre]: https://github.com/rust-lang/rust/pull/25323
3917 [file]: https://github.com/rust-lang/rust/pull/24598
3918 [ch]: https://github.com/rust-lang/rust/pull/24683
3919 [arc]: https://github.com/rust-lang/rust/pull/24695
3920 [si]: https://github.com/rust-lang/rust/pull/24701
3921 [ap]: https://github.com/rust-lang/rust/pull/24834
3922 [m]: https://github.com/rust-lang/rust/pull/24777
3923 [fs]: https://github.com/rust-lang/rfcs/blob/master/text/1044-io-fs-2.1.md
3924 [crc]: https://github.com/rust-lang/cargo/pull/1568
3925 [pie]: https://github.com/rust-lang/rust/pull/24953
3926 [abs]: https://github.com/rust-lang/rust/pull/25441
3927 [c]: https://github.com/rust-lang/rust/pull/25496
3928 [`Cloned`]: https://doc.rust-lang.org/nightly/std/iter/struct.Cloned.html
3929 [`Incoming`]: https://doc.rust-lang.org/nightly/std/net/struct.Incoming.html
3930 [inc]: https://github.com/rust-lang/rust/pull/25522
3931 [bh]: https://github.com/rust-lang/rust/pull/25856
3932 [`BinaryHeap`]: https://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html
3933 [ll]: https://github.com/rust-lang/rust/pull/26022
3934 [`split_off`]: https://doc.rust-lang.org/nightly/collections/linked_list/struct.LinkedList.html#method.split_off
3935 [drop]: https://github.com/rust-lang/rust/pull/24935
3937 Version 1.0.0 (2015-05-15)
3938 ========================
3940 * ~1500 changes, numerous bugfixes
3945 * The vast majority of the standard library is now `#[stable]`. It is
3946 no longer possible to use unstable features with a stable build of
3948 * Many popular crates on [crates.io] now work on the stable release
3950 * Arithmetic on basic integer types now [checks for overflow in debug
3956 * Several [restrictions have been added to trait coherence][coh] in
3957 order to make it easier for upstream authors to change traits
3958 without breaking downstream code.
3959 * Digits of binary and octal literals are [lexed more eagerly][lex] to
3960 improve error messages and macro behavior. For example, `0b1234` is
3961 now lexed as `0b1234` instead of two tokens, `0b1` and `234`.
3962 * Trait bounds [are always invariant][inv], eliminating the need for
3963 the `PhantomFn` and `MarkerTrait` lang items, which have been
3965 * ["-" is no longer a valid character in crate names][cr], the `extern crate
3966 "foo" as bar` syntax has been replaced with `extern crate foo as
3967 bar`, and Cargo now automatically translates "-" in *package* names
3968 to underscore for the crate name.
3969 * [Lifetime shadowing is an error][lt].
3970 * [`Send` no longer implies `'static`][send-rfc].
3971 * [UFCS now supports trait-less associated paths][moar-ufcs] like
3972 `MyType::default()`.
3973 * Primitive types [now have inherent methods][prim-inherent],
3974 obviating the need for extension traits like `SliceExt`.
3975 * Methods with `Self: Sized` in their `where` clause are [considered
3976 object-safe][self-sized], allowing many extension traits like
3977 `IteratorExt` to be merged into the traits they extended.
3978 * You can now [refer to associated types][assoc-where] whose
3979 corresponding trait bounds appear only in a `where` clause.
3980 * The final bits of [OIBIT landed][oibit-final], meaning that traits
3981 like `Send` and `Sync` are now library-defined.
3982 * A [Reflect trait][reflect] was introduced, which means that
3983 downcasting via the `Any` trait is effectively limited to concrete
3984 types. This helps retain the potentially-important "parametricity"
3985 property: generic code cannot behave differently for different type
3986 arguments except in minor ways.
3987 * The `unsafe_destructor` feature is now deprecated in favor of the
3988 [new `dropck`][dropck]. This change is a major reduction in unsafe
3994 * The `thread_local` module [has been renamed to `std::thread`][th].
3995 * The methods of `IteratorExt` [have been moved to the `Iterator`
3997 * Several traits that implement Rust's conventions for type
3998 conversions, `AsMut`, `AsRef`, `From`, and `Into` have been
3999 [centralized in the `std::convert` module][con].
4000 * The `FromError` trait [was removed in favor of `From`][fe].
4001 * The basic sleep function [has moved to
4002 `std::thread::sleep_ms`][slp].
4003 * The `splitn` function now takes an `n` parameter that represents the
4004 number of items yielded by the returned iterator [instead of the
4005 number of 'splits'][spl].
4006 * [On Unix, all file descriptors are `CLOEXEC` by default][clo].
4007 * [Derived implementations of `PartialOrd` now order enums according
4008 to their explicitly-assigned discriminants][po].
4009 * [Methods for searching strings are generic over `Pattern`s][pat],
4010 implemented presently by `&char`, `&str`, `FnMut(char) -> bool` and
4012 * [In method resolution, object methods are resolved before inherent
4014 * [`String::from_str` has been deprecated in favor of the `From` impl,
4015 `String::from`][sf].
4016 * [`io::Error` implements `Sync`][ios].
4017 * [The `words` method on `&str` has been replaced with
4018 `split_whitespace`][sw], to avoid answering the tricky question, 'what is
4020 * The new path and IO modules are complete and `#[stable]`. This
4021 was the major library focus for this cycle.
4022 * The path API was [revised][path-normalize] to normalize `.`,
4023 adjusting the tradeoffs in favor of the most common usage.
4024 * A large number of remaining APIs in `std` were also stabilized
4025 during this cycle; about 75% of the non-deprecated API surface
4027 * The new [string pattern API][string-pattern] landed, which makes
4028 the string slice API much more internally consistent and flexible.
4029 * A new set of [generic conversion traits][conversion] replaced
4030 many existing ad hoc traits.
4031 * Generic numeric traits were [completely removed][num-traits]. This
4032 was made possible thanks to inherent methods for primitive types,
4033 and the removal gives maximal flexibility for designing a numeric
4034 hierarchy in the future.
4035 * The `Fn` traits are now related via [inheritance][fn-inherit]
4036 and provide ergonomic [blanket implementations][fn-blanket].
4037 * The `Index` and `IndexMut` traits were changed to
4038 [take the index by value][index-value], enabling code like
4039 `hash_map["string"]` to work.
4040 * `Copy` now [inherits][copy-clone] from `Clone`, meaning that all
4041 `Copy` data is known to be `Clone` as well.
4046 * Many errors now have extended explanations that can be accessed with
4047 the `--explain` flag to `rustc`.
4048 * Many new examples have been added to the standard library
4050 * rustdoc has received a number of improvements focused on completion
4052 * Metadata was tuned, shrinking binaries [by 27%][metadata-shrink].
4053 * Much headway was made on ecosystem-wide CI, making it possible
4054 to [compare builds for breakage][ci-compare].
4057 [crates.io]: http://crates.io
4058 [clo]: https://github.com/rust-lang/rust/pull/24034
4059 [coh]: https://github.com/rust-lang/rfcs/blob/master/text/1023-rebalancing-coherence.md
4060 [con]: https://github.com/rust-lang/rust/pull/23875
4061 [cr]: https://github.com/rust-lang/rust/pull/23419
4062 [fe]: https://github.com/rust-lang/rust/pull/23879
4063 [ie]: https://github.com/rust-lang/rust/pull/23300
4064 [inv]: https://github.com/rust-lang/rust/pull/23938
4065 [ios]: https://github.com/rust-lang/rust/pull/24133
4066 [lex]: https://github.com/rust-lang/rfcs/blob/master/text/0879-small-base-lexing.md
4067 [lt]: https://github.com/rust-lang/rust/pull/24057
4068 [meth]: https://github.com/rust-lang/rust/pull/24056
4069 [pat]: https://github.com/rust-lang/rfcs/blob/master/text/0528-string-patterns.md
4070 [po]: https://github.com/rust-lang/rust/pull/24270
4071 [sf]: https://github.com/rust-lang/rust/pull/24517
4072 [slp]: https://github.com/rust-lang/rust/pull/23949
4073 [spl]: https://github.com/rust-lang/rfcs/blob/master/text/0979-align-splitn-with-other-languages.md
4074 [sw]: https://github.com/rust-lang/rfcs/blob/master/text/1054-str-words.md
4075 [th]: https://github.com/rust-lang/rfcs/blob/master/text/0909-move-thread-local-to-std-thread.md
4076 [send-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0458-send-improvements.md
4077 [moar-ufcs]: https://github.com/rust-lang/rust/pull/22172
4078 [prim-inherent]: https://github.com/rust-lang/rust/pull/23104
4079 [overflow]: https://github.com/rust-lang/rfcs/blob/master/text/0560-integer-overflow.md
4080 [metadata-shrink]: https://github.com/rust-lang/rust/pull/22971
4081 [self-sized]: https://github.com/rust-lang/rust/pull/22301
4082 [assoc-where]: https://github.com/rust-lang/rust/pull/22512
4083 [string-pattern]: https://github.com/rust-lang/rust/pull/22466
4084 [oibit-final]: https://github.com/rust-lang/rust/pull/21689
4085 [reflect]: https://github.com/rust-lang/rust/pull/23712
4086 [conversion]: https://github.com/rust-lang/rfcs/pull/529
4087 [num-traits]: https://github.com/rust-lang/rust/pull/23549
4088 [index-value]: https://github.com/rust-lang/rust/pull/23601
4089 [dropck]: https://github.com/rust-lang/rfcs/pull/769
4090 [ci-compare]: https://gist.github.com/brson/a30a77836fbec057cbee
4091 [fn-inherit]: https://github.com/rust-lang/rust/pull/23282
4092 [fn-blanket]: https://github.com/rust-lang/rust/pull/23895
4093 [copy-clone]: https://github.com/rust-lang/rust/pull/23860
4094 [path-normalize]: https://github.com/rust-lang/rust/pull/23229
4097 Version 1.0.0-alpha.2 (2015-02-20)
4098 =====================================
4100 * ~1300 changes, numerous bugfixes
4104 * The various I/O modules were [overhauled][io-rfc] to reduce
4105 unnecessary abstractions and provide better interoperation with
4106 the underlying platform. The old `io` module remains temporarily
4108 * The standard library now [participates in feature gating][feat],
4109 so use of unstable libraries now requires a `#![feature(...)]`
4110 attribute. The impact of this change is [described on the
4111 forum][feat-forum]. [RFC][feat-rfc].
4115 * `for` loops [now operate on the `IntoIterator` trait][into],
4116 which eliminates the need to call `.iter()`, etc. to iterate
4117 over collections. There are some new subtleties to remember
4118 though regarding what sort of iterators various types yield, in
4119 particular that `for foo in bar { }` yields values from a move
4120 iterator, destroying the original collection. [RFC][into-rfc].
4121 * Objects now have [default lifetime bounds][obj], so you don't
4122 have to write `Box<Trait+'static>` when you don't care about
4123 storing references. [RFC][obj-rfc].
4124 * In types that implement `Drop`, [lifetimes must outlive the
4125 value][drop]. This will soon make it possible to safely
4126 implement `Drop` for types where `#[unsafe_destructor]` is now
4127 required. Read the [gorgeous RFC][drop-rfc] for details.
4128 * The fully qualified <T as Trait>::X syntax lets you set the Self
4129 type for a trait method or associated type. [RFC][ufcs-rfc].
4130 * References to types that implement `Deref<U>` now [automatically
4131 coerce to references][deref] to the dereferenced type `U`,
4132 e.g. `&T where T: Deref<U>` automatically coerces to `&U`. This
4133 should eliminate many unsightly uses of `&*`, as when converting
4134 from references to vectors into references to
4135 slices. [RFC][deref-rfc].
4136 * The explicit [closure kind syntax][close] (`|&:|`, `|&mut:|`,
4137 `|:|`) is obsolete and closure kind is inferred from context.
4138 * [`Self` is a keyword][Self].
4142 * The `Show` and `String` formatting traits [have been
4143 renamed][fmt] to `Debug` and `Display` to more clearly reflect
4144 their related purposes. Automatically getting a string
4145 conversion to use with `format!("{:?}", something_to_debug)` is
4146 now written `#[derive(Debug)]`.
4147 * Abstract [OS-specific string types][osstr], `std::ff::{OsString,
4148 OsStr}`, provide strings in platform-specific encodings for easier
4149 interop with system APIs. [RFC][osstr-rfc].
4150 * The `boxed::into_raw` and `Box::from_raw` functions [convert
4151 between `Box<T>` and `*mut T`][boxraw], a common pattern for
4152 creating raw pointers.
4156 * Certain long error messages of the form 'expected foo found bar'
4157 are now [split neatly across multiple
4158 lines][multiline]. Examples in the PR.
4159 * On Unix Rust can be [uninstalled][un] by running
4160 `/usr/local/lib/rustlib/uninstall.sh`.
4161 * The `#[rustc_on_unimplemented]` attribute, requiring the
4162 'on_unimplemented' feature, lets rustc [display custom error
4163 messages when a trait is expected to be implemented for a type
4168 * Rust is tested against a [LALR grammar][lalr], which parses
4169 almost all the Rust files that rustc does.
4171 [boxraw]: https://github.com/rust-lang/rust/pull/21318
4172 [close]: https://github.com/rust-lang/rust/pull/21843
4173 [deref]: https://github.com/rust-lang/rust/pull/21351
4174 [deref-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0241-deref-conversions.md
4175 [drop]: https://github.com/rust-lang/rust/pull/21972
4176 [drop-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
4177 [feat]: https://github.com/rust-lang/rust/pull/21248
4178 [feat-forum]: https://users.rust-lang.org/t/psa-important-info-about-rustcs-new-feature-staging/82/5
4179 [feat-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0507-release-channels.md
4180 [fmt]: https://github.com/rust-lang/rust/pull/21457
4181 [into]: https://github.com/rust-lang/rust/pull/20790
4182 [into-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md#intoiterator-and-iterable
4183 [io-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
4184 [lalr]: https://github.com/rust-lang/rust/pull/21452
4185 [multiline]: https://github.com/rust-lang/rust/pull/19870
4186 [obj]: https://github.com/rust-lang/rust/pull/22230
4187 [obj-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0599-default-object-bound.md
4188 [onun]: https://github.com/rust-lang/rust/pull/20889
4189 [osstr]: https://github.com/rust-lang/rust/pull/21488
4190 [osstr-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
4191 [Self]: https://github.com/rust-lang/rust/pull/22158
4192 [ufcs-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0132-ufcs.md
4193 [un]: https://github.com/rust-lang/rust/pull/22256
4196 Version 1.0.0-alpha (2015-01-09)
4197 ==================================
4199 * ~2400 changes, numerous bugfixes
4203 * The language itself is considered feature complete for 1.0,
4204 though there will be many usability improvements and bugfixes
4205 before the final release.
4206 * Nearly 50% of the public API surface of the standard library has
4207 been declared 'stable'. Those interfaces are unlikely to change
4209 * The long-running debate over integer types has been
4210 [settled][ints]: Rust will ship with types named `isize` and
4211 `usize`, rather than `int` and `uint`, for pointer-sized
4212 integers. Guidelines will be rolled out during the alpha cycle.
4213 * Most crates that are not `std` have been moved out of the Rust
4214 distribution into the Cargo ecosystem so they can evolve
4215 separately and don't need to be stabilized as quickly, including
4216 'time', 'getopts', 'num', 'regex', and 'term'.
4217 * Documentation continues to be expanded with more API coverage, more
4218 examples, and more in-depth explanations. The guides have been
4219 consolidated into [The Rust Programming Language][trpl].
4220 * "[Rust By Example][rbe]" is now maintained by the Rust team.
4221 * All official Rust binary installers now come with [Cargo], the
4222 Rust package manager.
4226 * Closures have been [completely redesigned][unboxed] to be
4227 implemented in terms of traits, can now be used as generic type
4228 bounds and thus monomorphized and inlined, or via an opaque
4229 pointer (boxed) as in the old system. The new system is often
4230 referred to as 'unboxed' closures.
4231 * Traits now support [associated types][assoc], allowing families
4232 of related types to be defined together and used generically in
4234 * Enum variants are [namespaced by their type names][enum].
4235 * [`where` clauses][where] provide a more versatile and attractive
4236 syntax for specifying generic bounds, though the previous syntax
4238 * Rust again picks a [fallback][fb] (either i32 or f64) for uninferred
4240 * Rust [no longer has a runtime][rt] of any description, and only
4241 supports OS threads, not green threads.
4242 * At long last, Rust has been overhauled for 'dynamically-sized
4243 types' ([DST]), which integrates 'fat pointers' (object types,
4244 arrays, and `str`) more deeply into the type system, making it
4246 * Rust now has a general [range syntax][range], `i..j`, `i..`, and
4247 `..j` that produce range types and which, when combined with the
4248 `Index` operator and multidispatch, leads to a convenient slice
4250 * The new range syntax revealed an ambiguity in the fixed-length
4251 array syntax, so now fixed length arrays [are written `[T;
4253 * The `Copy` trait is no longer implemented automatically. Unsafe
4254 pointers no longer implement `Sync` and `Send` so types
4255 containing them don't automatically either. `Sync` and `Send`
4256 are now 'unsafe traits' so one can "forcibly" implement them via
4257 `unsafe impl` if a type confirms to the requirements for them
4258 even though the internals do not (e.g. structs containing unsafe
4259 pointers like `Arc`). These changes are intended to prevent some
4260 footguns and are collectively known as [opt-in built-in
4261 traits][oibit] (though `Sync` and `Send` will soon become pure
4262 library types unknown to the compiler).
4263 * Operator traits now take their operands [by value][ops], and
4264 comparison traits can use multidispatch to compare one type
4265 against multiple other types, allowing e.g. `String` to be
4266 compared with `&str`.
4267 * `if let` and `while let` are no longer feature-gated.
4268 * Rust has adopted a more [uniform syntax for escaping unicode
4269 characters][unicode].
4270 * `macro_rules!` [has been declared stable][mac]. Though it is a
4271 flawed system it is sufficiently popular that it must be usable
4272 for 1.0. Effort has gone into [future-proofing][mac-future] it
4273 in ways that will allow other macro systems to be developed in
4274 parallel, and won't otherwise impact the evolution of the
4276 * The prelude has been [pared back significantly][prelude] such
4277 that it is the minimum necessary to support the most pervasive
4278 code patterns, and through [generalized where clauses][where]
4279 many of the prelude extension traits have been consolidated.
4280 * Rust's rudimentary reflection [has been removed][refl], as it
4281 incurred too much code generation for little benefit.
4282 * [Struct variants][structvars] are no longer feature-gated.
4283 * Trait bounds can be [polymorphic over lifetimes][hrtb]. Also
4284 known as 'higher-ranked trait bounds', this crucially allows
4285 unboxed closures to work.
4286 * Macros invocations surrounded by parens or square brackets and
4287 not terminated by a semicolon are [parsed as
4288 expressions][macros], which makes expressions like `vec![1i32,
4289 2, 3].len()` work as expected.
4290 * Trait objects now implement their traits automatically, and
4291 traits that can be coerced to objects now must be [object
4293 * Automatically deriving traits is now done with `#[derive(...)]`
4294 not `#[deriving(...)]` for [consistency with other naming
4295 conventions][derive].
4296 * Importing the containing module or enum at the same time as
4297 items or variants they contain is [now done with `self` instead
4298 of `mod`][self], as in use `foo::{self, bar}`
4299 * Glob imports are no longer feature-gated.
4300 * The `box` operator and `box` patterns have been feature-gated
4301 pending a redesign. For now unique boxes should be allocated
4302 like other containers, with `Box::new`.
4306 * A [series][coll1] of [efforts][coll2] to establish
4307 [conventions][coll3] for collections types has resulted in API
4308 improvements throughout the standard library.
4309 * New [APIs for error handling][err] provide ergonomic interop
4310 between error types, and [new conventions][err-conv] describe
4311 more clearly the recommended error handling strategies in Rust.
4312 * The `fail!` macro has been renamed to [`panic!`][panic] so that
4313 it is easier to discuss failure in the context of error handling
4314 without making clarifications as to whether you are referring to
4315 the 'fail' macro or failure more generally.
4316 * On Linux, `OsRng` prefers the new, more reliable `getrandom`
4317 syscall when available.
4318 * The 'serialize' crate has been renamed 'rustc-serialize' and
4319 moved out of the distribution to Cargo. Although it is widely
4320 used now, it is expected to be superseded in the near future.
4321 * The `Show` formatter, typically implemented with
4322 `#[derive(Show)]` is [now requested with the `{:?}`
4323 specifier][show] and is intended for use by all types, for uses
4324 such as `println!` debugging. The new `String` formatter must be
4325 implemented by hand, uses the `{}` specifier, and is intended
4326 for full-fidelity conversions of things that can logically be
4327 represented as strings.
4331 * [Flexible target specification][flex] allows rustc's code
4332 generation to be configured to support otherwise-unsupported
4334 * Rust comes with rust-gdb and rust-lldb scripts that launch their
4335 respective debuggers with Rust-appropriate pretty-printing.
4336 * The Windows installation of Rust is distributed with the
4337 MinGW components currently required to link binaries on that
4342 * Nullable enum optimizations have been extended to more types so
4343 that e.g. `Option<Vec<T>>` and `Option<String>` take up no more
4344 space than the inner types themselves.
4345 * Work has begun on supporting AArch64.
4347 [Cargo]: https://crates.io
4348 [unboxed]: http://smallcultfollowing.com/babysteps/blog/2014/11/26/purging-proc/
4349 [enum]: https://github.com/rust-lang/rfcs/blob/master/text/0390-enum-namespacing.md
4350 [flex]: https://github.com/rust-lang/rfcs/blob/master/text/0131-target-specification.md
4351 [err]: https://github.com/rust-lang/rfcs/blob/master/text/0201-error-chaining.md
4352 [err-conv]: https://github.com/rust-lang/rfcs/blob/master/text/0236-error-conventions.md
4353 [rt]: https://github.com/rust-lang/rfcs/blob/master/text/0230-remove-runtime.md
4354 [mac]: https://github.com/rust-lang/rfcs/blob/master/text/0453-macro-reform.md
4355 [mac-future]: https://github.com/rust-lang/rfcs/pull/550
4356 [DST]: http://smallcultfollowing.com/babysteps/blog/2014/01/05/dst-take-5/
4357 [coll1]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md
4358 [coll2]: https://github.com/rust-lang/rfcs/blob/master/text/0509-collections-reform-part-2.md
4359 [coll3]: https://github.com/rust-lang/rfcs/blob/master/text/0216-collection-views.md
4360 [ops]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md
4361 [prelude]: https://github.com/rust-lang/rfcs/blob/master/text/0503-prelude-stabilization.md
4362 [where]: https://github.com/rust-lang/rfcs/blob/master/text/0135-where.md
4363 [refl]: https://github.com/rust-lang/rfcs/blob/master/text/0379-remove-reflection.md
4364 [panic]: https://github.com/rust-lang/rfcs/blob/master/text/0221-panic.md
4365 [structvars]: https://github.com/rust-lang/rfcs/blob/master/text/0418-struct-variants.md
4366 [hrtb]: https://github.com/rust-lang/rfcs/blob/master/text/0387-higher-ranked-trait-bounds.md
4367 [unicode]: https://github.com/rust-lang/rfcs/blob/master/text/0446-es6-unicode-escapes.md
4368 [oibit]: https://github.com/rust-lang/rfcs/blob/master/text/0019-opt-in-builtin-traits.md
4369 [macros]: https://github.com/rust-lang/rfcs/blob/master/text/0378-expr-macros.md
4370 [range]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md#indexing-and-slicing
4371 [arrays]: https://github.com/rust-lang/rfcs/blob/master/text/0520-new-array-repeat-syntax.md
4372 [show]: https://github.com/rust-lang/rfcs/blob/master/text/0504-show-stabilization.md
4373 [derive]: https://github.com/rust-lang/rfcs/blob/master/text/0534-deriving2derive.md
4374 [self]: https://github.com/rust-lang/rfcs/blob/master/text/0532-self-in-use.md
4375 [fb]: https://github.com/rust-lang/rfcs/blob/master/text/0212-restore-int-fallback.md
4376 [objsafe]: https://github.com/rust-lang/rfcs/blob/master/text/0255-object-safety.md
4377 [assoc]: https://github.com/rust-lang/rfcs/blob/master/text/0195-associated-items.md
4378 [ints]: https://github.com/rust-lang/rfcs/pull/544#issuecomment-68760871
4379 [trpl]: https://doc.rust-lang.org/book/index.html
4380 [rbe]: http://rustbyexample.com/
4383 Version 0.12.0 (2014-10-09)
4384 =============================
4386 * ~1900 changes, numerous bugfixes
4390 * The introductory documentation (now called The Rust Guide) has
4391 been completely rewritten, as have a number of supplementary
4393 * Rust's package manager, Cargo, continues to improve and is
4394 sometimes considered to be quite awesome.
4395 * Many API's in `std` have been reviewed and updated for
4396 consistency with the in-development Rust coding
4397 guidelines. The standard library documentation tracks
4398 stabilization progress.
4399 * Minor libraries have been moved out-of-tree to the rust-lang org
4400 on GitHub: uuid, semver, glob, num, hexfloat, fourcc. They can
4401 be installed with Cargo.
4402 * Lifetime elision allows lifetime annotations to be left off of
4403 function declarations in many common scenarios.
4404 * Rust now works on 64-bit Windows.
4407 * Indexing can be overloaded with the `Index` and `IndexMut`
4409 * The `if let` construct takes a branch only if the `let` pattern
4410 matches, currently behind the 'if_let' feature gate.
4411 * 'where clauses', a more flexible syntax for specifying trait
4412 bounds that is more aesthetic, have been added for traits and
4413 free functions. Where clauses will in the future make it
4414 possible to constrain associated types, which would be
4415 impossible with the existing syntax.
4416 * A new slicing syntax (e.g. `[0..4]`) has been introduced behind
4417 the 'slicing_syntax' feature gate, and can be overloaded with
4418 the `Slice` or `SliceMut` traits.
4419 * The syntax for matching of sub-slices has been changed to use a
4420 postfix `..` instead of prefix (.e.g. `[a, b, c..]`), for
4421 consistency with other uses of `..` and to future-proof
4422 potential additional uses of the syntax.
4423 * The syntax for matching inclusive ranges in patterns has changed
4424 from `0..3` to `0...4` to be consistent with the exclusive range
4426 * Matching of sub-slices in non-tail positions (e.g. `[a.., b,
4427 c]`) has been put behind the 'advanced_slice_patterns' feature
4428 gate and may be removed in the future.
4429 * Components of tuples and tuple structs can be extracted using
4430 the `value.0` syntax, currently behind the `tuple_indexing`
4432 * The `#[crate_id]` attribute is no longer supported; versioning
4433 is handled by the package manager.
4434 * Renaming crate imports are now written `extern crate foo as bar`
4435 instead of `extern crate bar = foo`.
4436 * Renaming use statements are now written `use foo as bar` instead
4438 * `let` and `match` bindings and argument names in macros are now
4440 * The new, more efficient, closure types ('unboxed closures') have
4441 been added under a feature gate, 'unboxed_closures'. These will
4442 soon replace the existing closure types, once higher-ranked
4443 trait lifetimes are added to the language.
4444 * `move` has been added as a keyword, for indicating closures
4445 that capture by value.
4446 * Mutation and assignment is no longer allowed in pattern guards.
4447 * Generic structs and enums can now have trait bounds.
4448 * The `Share` trait is now called `Sync` to free up the term
4449 'shared' to refer to 'shared reference' (the default reference
4451 * Dynamically-sized types have been mostly implemented,
4452 unifying the behavior of fat-pointer types with the rest of the
4454 * As part of dynamically-sized types, the `Sized` trait has been
4455 introduced, which qualifying types implement by default, and
4456 which type parameters expect by default. To specify that a type
4457 parameter does not need to be sized, write `<Sized? T>`. Most
4458 types are `Sized`, notable exceptions being unsized arrays
4459 (`[T]`) and trait types.
4460 * Closures can return `!`, as in `|| -> !` or `proc() -> !`.
4461 * Lifetime bounds can now be applied to type parameters and object
4463 * The old, reference counted GC type, `Gc<T>` which was once
4464 denoted by the `@` sigil, has finally been removed. GC will be
4465 revisited in the future.
4468 * Library documentation has been improved for a number of modules.
4469 * Bit-vectors, collections::bitv has been modernized.
4470 * The url crate is deprecated in favor of
4471 http://github.com/servo/rust-url, which can be installed with
4473 * Most I/O stream types can be cloned and subsequently closed from
4475 * A `std::time::Duration` type has been added for use in I/O
4476 methods that rely on timers, as well as in the 'time' crate's
4477 `Timespec` arithmetic.
4478 * The runtime I/O abstraction layer that enabled the green thread
4479 scheduler to do non-thread-blocking I/O has been removed, along
4480 with the libuv-based implementation employed by the green thread
4481 scheduler. This will greatly simplify the future I/O work.
4482 * `collections::btree` has been rewritten to have a more
4483 idiomatic and efficient design.
4486 * rustdoc output now indicates the stability levels of API's.
4487 * The `--crate-name` flag can specify the name of the crate
4488 being compiled, like `#[crate_name]`.
4489 * The `-C metadata` specifies additional metadata to hash into
4490 symbol names, and `-C extra-filename` specifies additional
4491 information to put into the output filename, for use by the
4492 package manager for versioning.
4493 * debug info generation has continued to improve and should be
4494 more reliable under both gdb and lldb.
4495 * rustc has experimental support for compiling in parallel
4496 using the `-C codegen-units` flag.
4497 * rustc no longer encodes rpath information into binaries by
4501 * Stack usage has been optimized with LLVM lifetime annotations.
4502 * Official Rust binaries on Linux are more compatible with older
4503 kernels and distributions, built on CentOS 5.10.
4506 Version 0.11.0 (2014-07-02)
4507 ==========================
4509 * ~1700 changes, numerous bugfixes
4512 * ~[T] has been removed from the language. This type is superseded by
4514 * ~str has been removed from the language. This type is superseded by
4516 * ~T has been removed from the language. This type is superseded by the
4518 * @T has been removed from the language. This type is superseded by the
4519 standard library's std::gc::Gc<T> type.
4520 * Struct fields are now all private by default.
4521 * Vector indices and shift amounts are both required to be a `uint`
4522 instead of any integral type.
4523 * Byte character, byte string, and raw byte string literals are now all
4524 supported by prefixing the normal literal with a `b`.
4525 * Multiple ABIs are no longer allowed in an ABI string
4526 * The syntax for lifetimes on closures/procedures has been tweaked
4527 slightly: `<'a>|A, B|: 'b + K -> T`
4528 * Floating point modulus has been removed from the language; however it
4529 is still provided by a library implementation.
4530 * Private enum variants are now disallowed.
4531 * The `priv` keyword has been removed from the language.
4532 * A closure can no longer be invoked through a &-pointer.
4533 * The `use foo, bar, baz;` syntax has been removed from the language.
4534 * The transmute intrinsic no longer works on type parameters.
4535 * Statics now allow blocks/items in their definition.
4536 * Trait bounds are separated from objects with + instead of : now.
4537 * Objects can no longer be read while they are mutably borrowed.
4538 * The address of a static is now marked as insignificant unless the
4539 #[inline(never)] attribute is placed it.
4540 * The #[unsafe_destructor] attribute is now behind a feature gate.
4541 * Struct literals are no longer allowed in ambiguous positions such as
4542 if, while, match, and for..in.
4543 * Declaration of lang items and intrinsics are now feature-gated by
4545 * Integral literals no longer default to `int`, and floating point
4546 literals no longer default to `f64`. Literals must be suffixed with an
4547 appropriate type if inference cannot determine the type of the
4549 * The Box<T> type is no longer implicitly borrowed to &mut T.
4550 * Procedures are now required to not capture borrowed references.
4553 * The standard library is now a "facade" over a number of underlying
4554 libraries. This means that development on the standard library should
4555 be speeder due to smaller crates, as well as a clearer line between
4557 * A new library, libcore, lives under the standard library's facade
4558 which is Rust's "0-assumption" library, suitable for embedded and
4559 kernel development for example.
4560 * A regex crate has been added to the standard distribution. This crate
4561 includes statically compiled regular expressions.
4562 * The unwrap/unwrap_err methods on Result require a Show bound for
4563 better error messages.
4564 * The return types of the std::comm primitives have been centralized
4565 around the Result type.
4566 * A number of I/O primitives have gained the ability to time out their
4568 * A number of I/O primitives have gained the ability to close their
4569 reading/writing halves to cancel pending operations.
4570 * Reverse iterator methods have been removed in favor of `rev()` on
4571 their forward-iteration counterparts.
4572 * A bitflags! macro has been added to enable easy interop with C and
4573 management of bit flags.
4574 * A debug_assert! macro is now provided which is disabled when
4575 `--cfg ndebug` is passed to the compiler.
4576 * A graphviz crate has been added for creating .dot files.
4577 * The std::cast module has been migrated into std::mem.
4578 * The std::local_data api has been migrated from freestanding functions
4579 to being based on methods.
4580 * The Pod trait has been renamed to Copy.
4581 * jemalloc has been added as the default allocator for types.
4582 * The API for allocating memory has been changed to use proper alignment
4583 and sized deallocation
4584 * Connecting a TcpStream or binding a TcpListener is now based on a
4585 string address and a u16 port. This allows connecting to a hostname as
4587 * The Reader trait now contains a core method, read_at_least(), which
4588 correctly handles many repeated 0-length reads.
4589 * The process-spawning API is now centered around a builder-style
4591 * The :? printing qualifier has been moved from the standard library to
4592 an external libdebug crate.
4593 * Eq/Ord have been renamed to PartialEq/PartialOrd. TotalEq/TotalOrd
4594 have been renamed to Eq/Ord.
4595 * The select/plural methods have been removed from format!. The escapes
4596 for { and } have also changed from \{ and \} to {{ and }},
4598 * The TaskBuilder API has been re-worked to be a true builder, and
4599 extension traits for spawning native/green tasks have been added.
4602 * All breaking changes to the language or libraries now have their
4603 commit message annotated with `[breaking-change]` to allow for easy
4604 discovery of breaking changes.
4605 * The compiler will now try to suggest how to annotate lifetimes if a
4606 lifetime-related error occurs.
4607 * Debug info continues to be improved greatly with general bug fixes and
4608 better support for situations like link time optimization (LTO).
4609 * Usage of syntax extensions when cross-compiling has been fixed.
4610 * Functionality equivalent to GCC & Clang's -ffunction-sections,
4611 -fdata-sections and --gc-sections has been enabled by default
4612 * The compiler is now stricter about where it will load module files
4613 from when a module is declared via `mod foo;`.
4614 * The #[phase(syntax)] attribute has been renamed to #[phase(plugin)].
4615 Syntax extensions are now discovered via a "plugin registrar" type
4616 which will be extended in the future to other various plugins.
4617 * Lints have been restructured to allow for dynamically loadable lints.
4618 * A number of rustdoc improvements:
4619 * The HTML output has been visually redesigned.
4620 * Markdown is now powered by hoedown instead of sundown.
4621 * Searching heuristics have been greatly improved.
4622 * The search index has been reduced in size by a great amount.
4623 * Cross-crate documentation via `pub use` has been greatly improved.
4624 * Primitive types are now hyperlinked and documented.
4625 * Documentation has been moved from static.rust-lang.org/doc to
4627 * A new sandbox, play.rust-lang.org, is available for running and
4628 sharing rust code examples on-line.
4629 * Unused attributes are now more robustly warned about.
4630 * The dead_code lint now warns about unused struct fields.
4631 * Cross-compiling to iOS is now supported.
4632 * Cross-compiling to mipsel is now supported.
4633 * Stability attributes are now inherited by default and no longer apply
4634 to intra-crate usage, only inter-crate usage.
4635 * Error message related to non-exhaustive match expressions have been
4639 Version 0.10 (2014-04-03)
4640 =========================
4642 * ~1500 changes, numerous bugfixes
4645 * A new RFC process is now in place for modifying the language.
4646 * Patterns with `@`-pointers have been removed from the language.
4647 * Patterns with unique vectors (`~[T]`) have been removed from the
4649 * Patterns with unique strings (`~str`) have been removed from the
4651 * `@str` has been removed from the language.
4652 * `@[T]` has been removed from the language.
4653 * `@self` has been removed from the language.
4654 * `@Trait` has been removed from the language.
4655 * Headers on `~` allocations which contain `@` boxes inside the type for
4656 reference counting have been removed.
4657 * The semantics around the lifetimes of temporary expressions have changed,
4658 see #3511 and #11585 for more information.
4659 * Cross-crate syntax extensions are now possible, but feature gated. See
4660 #11151 for more information. This includes both `macro_rules!` macros as
4661 well as syntax extensions such as `format!`.
4662 * New lint modes have been added, and older ones have been turned on to be
4664 * Unnecessary parentheses
4667 * Uppercase variables
4668 * Publicly visible private types
4669 * `#[deriving]` with raw pointers
4670 * Unsafe functions can no longer be coerced to closures.
4671 * Various obscure macros such as `log_syntax!` are now behind feature gates.
4672 * The `#[simd]` attribute is now behind a feature gate.
4673 * Visibility is no longer allowed on `extern crate` statements, and
4674 unnecessary visibility (`priv`) is no longer allowed on `use` statements.
4675 * Trailing commas are now allowed in argument lists and tuple patterns.
4676 * The `do` keyword has been removed, it is now a reserved keyword.
4677 * Default type parameters have been implemented, but are feature gated.
4678 * Borrowed variables through captures in closures are now considered soundly.
4679 * `extern mod` is now `extern crate`
4680 * The `Freeze` trait has been removed.
4681 * The `Share` trait has been added for types that can be shared among
4683 * Labels in macros are now hygienic.
4684 * Expression/statement macro invocations can be delimited with `{}` now.
4685 * Treatment of types allowed in `static mut` locations has been tweaked.
4686 * The `*` and `.` operators are now overloadable through the `Deref` and
4688 * `~Trait` and `proc` no longer have `Send` bounds by default.
4689 * Partial type hints are now supported with the `_` type marker.
4690 * An `Unsafe` type was introduced for interior mutability. It is now
4691 considered undefined to transmute from `&T` to `&mut T` without using the
4693 * The #[linkage] attribute was implemented for extern statics/functions.
4694 * The inner attribute syntax has changed from `#[foo];` to `#![foo]`.
4695 * `Pod` was renamed to `Copy`.
4698 * The `libextra` library has been removed. It has now been decomposed into
4699 component libraries with smaller and more focused nuggets of
4700 functionality. The full list of libraries can be found on the
4701 documentation index page.
4702 * std: `std::condition` has been removed. All I/O errors are now propagated
4703 through the `Result` type. In order to assist with error handling, a
4704 `try!` macro for unwrapping errors with an early return and a lint for
4705 unused results has been added. See #12039 for more information.
4706 * std: The `vec` module has been renamed to `slice`.
4707 * std: A new vector type, `Vec<T>`, has been added in preparation for DST.
4708 This will become the only growable vector in the future.
4709 * std: `std::io` now has more public-reexports. Types such as `BufferedReader`
4710 are now found at `std::io::BufferedReader` instead of
4711 `std::io::buffered::BufferedReader`.
4712 * std: `print` and `println` are no longer in the prelude, the `print!` and
4713 `println!` macros are intended to be used instead.
4714 * std: `Rc` now has a `Weak` pointer for breaking cycles, and it no longer
4715 attempts to statically prevent cycles.
4716 * std: The standard distribution is adopting the policy of pushing failure
4717 to the user rather than failing in libraries. Many functions (such as
4718 `slice::last()`) now return `Option<T>` instead of `T` + failing.
4719 * std: `fmt::Default` has been renamed to `fmt::Show`, and it now has a new
4720 deriving mode: `#[deriving(Show)]`.
4721 * std: `ToStr` is now implemented for all types implementing `Show`.
4722 * std: The formatting trait methods now take `&self` instead of `&T`
4723 * std: The `invert()` method on iterators has been renamed to `rev()`
4724 * std: `std::num` has seen a reduction in the genericity of its traits,
4725 consolidating functionality into a few core traits.
4726 * std: Backtraces are now printed on task failure if the environment
4727 variable `RUST_BACKTRACE` is present.
4728 * std: Naming conventions for iterators have been standardized. More details
4729 can be found on the wiki's style guide.
4730 * std: `eof()` has been removed from the `Reader` trait. Specific types may
4731 still implement the function.
4732 * std: Networking types are now cloneable to allow simultaneous reads/writes.
4733 * std: `assert_approx_eq!` has been removed
4734 * std: The `e` and `E` formatting specifiers for floats have been added to
4735 print them in exponential notation.
4736 * std: The `Times` trait has been removed
4737 * std: Indications of variance and opting out of builtin bounds is done
4738 through marker types in `std::kinds::marker` now
4739 * std: `hash` has been rewritten, `IterBytes` has been removed, and
4740 `#[deriving(Hash)]` is now possible.
4741 * std: `SharedChan` has been removed, `Sender` is now cloneable.
4742 * std: `Chan` and `Port` were renamed to `Sender` and `Receiver`.
4743 * std: `Chan::new` is now `channel()`.
4744 * std: A new synchronous channel type has been implemented.
4745 * std: A `select!` macro is now provided for selecting over `Receiver`s.
4746 * std: `hashmap` and `trie` have been moved to `libcollections`
4747 * std: `run` has been rolled into `io::process`
4748 * std: `assert_eq!` now uses `{}` instead of `{:?}`
4749 * std: The equality and comparison traits have seen some reorganization.
4750 * std: `rand` has moved to `librand`.
4751 * std: `to_{lower,upper}case` has been implemented for `char`.
4752 * std: Logging has been moved to `liblog`.
4753 * collections: `HashMap` has been rewritten for higher performance and less
4755 * native: The default runtime is now `libnative`. If `libgreen` is desired,
4756 it can be booted manually. The runtime guide has more information and
4758 * native: All I/O functionality except signals has been implemented.
4759 * green: Task spawning with `libgreen` has been optimized with stack caching
4760 and various trimming of code.
4761 * green: Tasks spawned by `libgreen` now have an unmapped guard page.
4762 * sync: The `extra::sync` module has been updated to modern rust (and moved
4763 to the `sync` library), tweaking and improving various interfaces while
4764 dropping redundant functionality.
4765 * sync: A new `Barrier` type has been added to the `sync` library.
4766 * sync: An efficient mutex for native and green tasks has been implemented.
4767 * serialize: The `base64` module has seen some improvement. It treats
4768 newlines better, has non-string error values, and has seen general
4770 * fourcc: A `fourcc!` macro was introduced
4771 * hexfloat: A `hexfloat!` macro was implemented for specifying floats via a
4772 hexadecimal literal.
4775 * `rustpkg` has been deprecated and removed from the main repository. Its
4776 replacement, `cargo`, is under development.
4777 * Nightly builds of rust are now available
4778 * The memory usage of rustc has been improved many times throughout this
4780 * The build process supports disabling rpath support for the rustc binary
4782 * Code generation has improved in some cases, giving more information to the
4783 LLVM optimization passes to enable more extensive optimizations.
4784 * Debuginfo compatibility with lldb on OSX has been restored.
4785 * The master branch is now gated on an android bot, making building for
4786 android much more reliable.
4787 * Output flags have been centralized into one `--emit` flag.
4788 * Crate type flags have been centralized into one `--crate-type` flag.
4789 * Codegen flags have been consolidated behind a `-C` flag.
4790 * Linking against outdated crates now has improved error messages.
4791 * Error messages with lifetimes will often suggest how to annotate the
4792 function to fix the error.
4793 * Many more types are documented in the standard library, and new guides
4795 * Many `rustdoc` improvements:
4796 * code blocks are syntax highlighted.
4797 * render standalone markdown files.
4798 * the --test flag tests all code blocks by default.
4799 * exported macros are displayed.
4800 * reexported types have their documentation inlined at the location of the
4802 * search works across crates that have been rendered to the same output
4806 Version 0.9 (2014-01-09)
4807 ==========================
4809 * ~1800 changes, numerous bugfixes
4812 * The `float` type has been removed. Use `f32` or `f64` instead.
4813 * A new facility for enabling experimental features (feature gating) has
4814 been added, using the crate-level `#[feature(foo)]` attribute.
4815 * Managed boxes (@) are now behind a feature gate
4816 (`#[feature(managed_boxes)]`) in preparation for future removal. Use the
4817 standard library's `Gc` or `Rc` types instead.
4818 * `@mut` has been removed. Use `std::cell::{Cell, RefCell}` instead.
4819 * Jumping back to the top of a loop is now done with `continue` instead of
4821 * Strings can no longer be mutated through index assignment.
4822 * Raw strings can be created via the basic `r"foo"` syntax or with matched
4823 hash delimiters, as in `r###"foo"###`.
4824 * `~fn` is now written `proc (args) -> retval { ... }` and may only be
4826 * The `&fn` type is now written `|args| -> ret` to match the literal form.
4827 * `@fn`s have been removed.
4828 * `do` only works with procs in order to make it obvious what the cost
4830 * Single-element tuple-like structs can no longer be dereferenced to
4831 obtain the inner value. A more comprehensive solution for overloading
4832 the dereference operator will be provided in the future.
4833 * The `#[link(...)]` attribute has been replaced with
4834 `#[crate_id = "name#vers"]`.
4835 * Empty `impl`s must be terminated with empty braces and may not be
4836 terminated with a semicolon.
4837 * Keywords are no longer allowed as lifetime names; the `self` lifetime
4838 no longer has any special meaning.
4839 * The old `fmt!` string formatting macro has been removed.
4840 * `printf!` and `printfln!` (old-style formatting) removed in favor of
4841 `print!` and `println!`.
4842 * `mut` works in patterns now, as in `let (mut x, y) = (1, 2);`.
4843 * The `extern mod foo (name = "bar")` syntax has been removed. Use
4844 `extern mod foo = "bar"` instead.
4845 * New reserved keywords: `alignof`, `offsetof`, `sizeof`.
4846 * Macros can have attributes.
4847 * Macros can expand to items with attributes.
4848 * Macros can expand to multiple items.
4849 * The `asm!` macro is feature-gated (`#[feature(asm)]`).
4850 * Comments may be nested.
4851 * Values automatically coerce to trait objects they implement, without
4853 * Enum discriminants are no longer an entire word but as small as needed to
4854 contain all the variants. The `repr` attribute can be used to override
4855 the discriminant size, as in `#[repr(int)]` for integer-sized, and
4856 `#[repr(C)]` to match C enums.
4857 * Non-string literals are not allowed in attributes (they never worked).
4858 * The FFI now supports variadic functions.
4859 * Octal numeric literals, as in `0o7777`.
4860 * The `concat!` syntax extension performs compile-time string concatenation.
4861 * The `#[fixed_stack_segment]` and `#[rust_stack]` attributes have been
4862 removed as Rust no longer uses segmented stacks.
4863 * Non-ascii identifiers are feature-gated (`#[feature(non_ascii_idents)]`).
4864 * Ignoring all fields of an enum variant or tuple-struct is done with `..`,
4865 not `*`; ignoring remaining fields of a struct is also done with `..`,
4866 not `_`; ignoring a slice of a vector is done with `..`, not `.._`.
4867 * `rustc` supports the "win64" calling convention via `extern "win64"`.
4868 * `rustc` supports the "system" calling convention, which defaults to the
4869 preferred convention for the target platform, "stdcall" on 32-bit Windows,
4871 * The `type_overflow` lint (default: warn) checks literals for overflow.
4872 * The `unsafe_block` lint (default: allow) checks for usage of `unsafe`.
4873 * The `attribute_usage` lint (default: warn) warns about unknown
4875 * The `unknown_features` lint (default: warn) warns about unknown
4877 * The `dead_code` lint (default: warn) checks for dead code.
4878 * Rust libraries can be linked statically to one another
4879 * `#[link_args]` is behind the `link_args` feature gate.
4880 * Native libraries are now linked with `#[link(name = "foo")]`
4881 * Native libraries can be statically linked to a rust crate
4882 (`#[link(name = "foo", kind = "static")]`).
4883 * Native OS X frameworks are now officially supported
4884 (`#[link(name = "foo", kind = "framework")]`).
4885 * The `#[thread_local]` attribute creates thread-local (not task-local)
4886 variables. Currently behind the `thread_local` feature gate.
4887 * The `return` keyword may be used in closures.
4888 * Types that can be copied via a memcpy implement the `Pod` kind.
4889 * The `cfg` attribute can now be used on struct fields and enum variants.
4892 * std: The `option` and `result` API's have been overhauled to make them
4893 simpler, more consistent, and more composable.
4894 * std: The entire `std::io` module has been replaced with one that is
4895 more comprehensive and that properly interfaces with the underlying
4896 scheduler. File, TCP, UDP, Unix sockets, pipes, and timers are all
4898 * std: `io::util` contains a number of useful implementations of
4899 `Reader` and `Writer`, including `NullReader`, `NullWriter`,
4900 `ZeroReader`, `TeeReader`.
4901 * std: The reference counted pointer type `extra::rc` moved into std.
4902 * std: The `Gc` type in the `gc` module will replace `@` (it is currently
4903 just a wrapper around it).
4904 * std: The `Either` type has been removed.
4905 * std: `fmt::Default` can be implemented for any type to provide default
4906 formatting to the `format!` macro, as in `format!("{}", myfoo)`.
4907 * std: The `rand` API continues to be tweaked.
4908 * std: The `rust_begin_unwind` function, useful for inserting breakpoints
4909 on failure in gdb, is now named `rust_fail`.
4910 * std: The `each_key` and `each_value` methods on `HashMap` have been
4911 replaced by the `keys` and `values` iterators.
4912 * std: Functions dealing with type size and alignment have moved from the
4913 `sys` module to the `mem` module.
4914 * std: The `path` module was written and API changed.
4915 * std: `str::from_utf8` has been changed to cast instead of allocate.
4916 * std: `starts_with` and `ends_with` methods added to vectors via the
4917 `ImmutableEqVector` trait, which is in the prelude.
4918 * std: Vectors can be indexed with the `get_opt` method, which returns `None`
4919 if the index is out of bounds.
4920 * std: Task failure no longer propagates between tasks, as the model was
4921 complex, expensive, and incompatible with thread-based tasks.
4922 * std: The `Any` type can be used for dynamic typing.
4923 * std: `~Any` can be passed to the `fail!` macro and retrieved via
4925 * std: Methods that produce iterators generally do not have an `_iter`
4927 * std: `cell::Cell` and `cell::RefCell` can be used to introduce mutability
4928 roots (mutable fields, etc.). Use instead of e.g. `@mut`.
4929 * std: `util::ignore` renamed to `prelude::drop`.
4930 * std: Slices have `sort` and `sort_by` methods via the `MutableVector`
4932 * std: `vec::raw` has seen a lot of cleanup and API changes.
4933 * std: The standard library no longer includes any C++ code, and very
4934 minimal C, eliminating the dependency on libstdc++.
4935 * std: Runtime scheduling and I/O functionality has been factored out into
4936 extensible interfaces and is now implemented by two different crates:
4937 libnative, for native threading and I/O; and libgreen, for green threading
4938 and I/O. This paves the way for using the standard library in more limited
4939 embedded environments.
4940 * std: The `comm` module has been rewritten to be much faster, have a
4941 simpler, more consistent API, and to work for both native and green
4943 * std: All libuv dependencies have been moved into the rustuv crate.
4944 * native: New implementations of runtime scheduling on top of OS threads.
4945 * native: New native implementations of TCP, UDP, file I/O, process spawning,
4947 * green: The green thread scheduler and message passing types are almost
4949 * extra: The `flatpipes` module had bitrotted and was removed.
4950 * extra: All crypto functions have been removed and Rust now has a policy of
4951 not reimplementing crypto in the standard library. In the future crypto
4952 will be provided by external crates with bindings to established libraries.
4953 * extra: `c_vec` has been modernized.
4954 * extra: The `sort` module has been removed. Use the `sort` method on
4958 * The `rust` and `rusti` commands have been removed, due to lack of
4960 * `rustdoc` was completely rewritten.
4961 * `rustdoc` can test code examples in documentation.
4962 * `rustpkg` can test packages with the argument, 'test'.
4963 * `rustpkg` supports arbitrary dependencies, including C libraries.
4964 * `rustc`'s support for generating debug info is improved again.
4965 * `rustc` has better error reporting for unbalanced delimiters.
4966 * `rustc`'s JIT support was removed due to bitrot.
4967 * Executables and static libraries can be built with LTO (-Z lto)
4968 * `rustc` adds a `--dep-info` flag for communicating dependencies to
4972 Version 0.8 (2013-09-26)
4973 ============================
4975 * ~2200 changes, numerous bugfixes
4978 * The `for` loop syntax has changed to work with the `Iterator` trait.
4979 * At long last, unwinding works on Windows.
4980 * Default methods are ready for use.
4981 * Many trait inheritance bugs fixed.
4982 * Owned and borrowed trait objects work more reliably.
4983 * `copy` is no longer a keyword. It has been replaced by the `Clone` trait.
4984 * rustc can omit emission of code for the `debug!` macro if it is passed
4986 * mod.rs is now "blessed". When loading `mod foo;`, rustc will now look
4987 for foo.rs, then foo/mod.rs, and will generate an error when both are
4989 * Strings no longer contain trailing nulls. The new `std::c_str` module
4990 provides new mechanisms for converting to C strings.
4991 * The type of foreign functions is now `extern "C" fn` instead of `*u8'.
4992 * The FFI has been overhauled such that foreign functions are called directly,
4993 instead of through a stack-switching wrapper.
4994 * Calling a foreign function must be done through a Rust function with the
4995 `#[fixed_stack_segment]` attribute.
4996 * The `externfn!` macro can be used to declare both a foreign function and
4997 a `#[fixed_stack_segment]` wrapper at once.
4998 * `pub` and `priv` modifiers on `extern` blocks are no longer parsed.
4999 * `unsafe` is no longer allowed on extern fns - they are all unsafe.
5000 * `priv` is disallowed everywhere except for struct fields and enum variants.
5001 * `&T` (besides `&'static T`) is no longer allowed in `@T`.
5002 * `ref` bindings in irrefutable patterns work correctly now.
5003 * `char` is now prevented from containing invalid code points.
5004 * Casting to `bool` is no longer allowed.
5005 * `\0` is now accepted as an escape in chars and strings.
5006 * `yield` is a reserved keyword.
5007 * `typeof` is a reserved keyword.
5008 * Crates may be imported by URL with `extern mod foo = "url";`.
5009 * Explicit enum discriminants may be given as uints as in `enum E { V = 0u }`
5010 * Static vectors can be initialized with repeating elements,
5011 e.g. `static foo: [u8, .. 100]: [0, .. 100];`.
5012 * Static structs can be initialized with functional record update,
5013 e.g. `static foo: Foo = Foo { a: 5, .. bar };`.
5014 * `cfg!` can be used to conditionally execute code based on the crate
5015 configuration, similarly to `#[cfg(...)]`.
5016 * The `unnecessary_qualification` lint detects unneeded module
5017 prefixes (default: allow).
5018 * Arithmetic operations have been implemented on the SIMD types in
5019 `std::unstable::simd`.
5020 * Exchange allocation headers were removed, reducing memory usage.
5021 * `format!` implements a completely new, extensible, and higher-performance
5022 string formatting system. It will replace `fmt!`.
5023 * `print!` and `println!` write formatted strings (using the `format!`
5024 extension) to stdout.
5025 * `write!` and `writeln!` write formatted strings (using the `format!`
5026 extension) to the new Writers in `std::rt::io`.
5027 * The library section in which a function or static is placed may
5028 be specified with `#[link_section = "..."]`.
5029 * The `proto!` syntax extension for defining bounded message protocols
5031 * `macro_rules!` is hygienic for `let` declarations.
5032 * The `#[export_name]` attribute specifies the name of a symbol.
5033 * `unreachable!` can be used to indicate unreachable code, and fails
5037 * std: Transitioned to the new runtime, written in Rust.
5038 * std: Added an experimental I/O library, `rt::io`, based on the new
5040 * std: A new generic `range` function was added to the prelude, replacing
5041 `uint::range` and friends.
5042 * std: `range_rev` no longer exists. Since range is an iterator it can be
5043 reversed with `range(lo, hi).invert()`.
5044 * std: The `chain` method on option renamed to `and_then`; `unwrap_or_default`
5045 renamed to `unwrap_or`.
5046 * std: The `iterator` module was renamed to `iter`.
5047 * std: Integral types now support the `checked_add`, `checked_sub`, and
5048 `checked_mul` operations for detecting overflow.
5049 * std: Many methods in `str`, `vec`, `option, `result` were renamed for
5051 * std: Methods are standardizing on conventions for casting methods:
5052 `to_foo` for copying, `into_foo` for moving, `as_foo` for temporary
5054 * std: The `CString` type in `c_str` provides new ways to convert to and
5056 * std: `DoubleEndedIterator` can yield elements in two directions.
5057 * std: The `mut_split` method on vectors partitions an `&mut [T]` into
5059 * std: `str::from_bytes` renamed to `str::from_utf8`.
5060 * std: `pop_opt` and `shift_opt` methods added to vectors.
5061 * std: The task-local data interface no longer uses @, and keys are
5062 no longer function pointers.
5063 * std: The `swap_unwrap` method of `Option` renamed to `take_unwrap`.
5064 * std: Added `SharedPort` to `comm`.
5065 * std: `Eq` has a default method for `ne`; only `eq` is required
5067 * std: `Ord` has default methods for `le`, `gt` and `ge`; only `lt`
5068 is required in implementations.
5069 * std: `is_utf8` performance is improved, impacting many string functions.
5070 * std: `os::MemoryMap` provides cross-platform mmap.
5071 * std: `ptr::offset` is now unsafe, but also more optimized. Offsets that
5072 are not 'in-bounds' are considered undefined.
5073 * std: Many freestanding functions in `vec` removed in favor of methods.
5074 * std: Many freestanding functions on scalar types removed in favor of
5076 * std: Many options to task builders were removed since they don't make
5077 sense in the new scheduler design.
5078 * std: More containers implement `FromIterator` so can be created by the
5080 * std: More complete atomic types in `unstable::atomics`.
5081 * std: `comm::PortSet` removed.
5082 * std: Mutating methods in the `Set` and `Map` traits have been moved into
5083 the `MutableSet` and `MutableMap` traits. `Container::is_empty`,
5084 `Map::contains_key`, `MutableMap::insert`, and `MutableMap::remove` have
5085 default implementations.
5086 * std: Various `from_str` functions were removed in favor of a generic
5087 `from_str` which is available in the prelude.
5088 * std: `util::unreachable` removed in favor of the `unreachable!` macro.
5089 * extra: `dlist`, the doubly-linked list was modernized.
5090 * extra: Added a `hex` module with `ToHex` and `FromHex` traits.
5091 * extra: Added `glob` module, replacing `std::os::glob`.
5092 * extra: `rope` was removed.
5093 * extra: `deque` was renamed to `ringbuf`. `RingBuf` implements `Deque`.
5094 * extra: `net`, and `timer` were removed. The experimental replacements
5095 are `std::rt::io::net` and `std::rt::io::timer`.
5096 * extra: Iterators implemented for `SmallIntMap`.
5097 * extra: Iterators implemented for `Bitv` and `BitvSet`.
5098 * extra: `SmallIntSet` removed. Use `BitvSet`.
5099 * extra: Performance of JSON parsing greatly improved.
5100 * extra: `semver` updated to SemVer 2.0.0.
5101 * extra: `term` handles more terminals correctly.
5102 * extra: `dbg` module removed.
5103 * extra: `par` module removed.
5104 * extra: `future` was cleaned up, with some method renames.
5105 * extra: Most free functions in `getopts` were converted to methods.
5108 * rustc's debug info generation (`-Z debug-info`) is greatly improved.
5109 * rustc accepts `--target-cpu` to compile to a specific CPU architecture,
5110 similarly to gcc's `--march` flag.
5111 * rustc's performance compiling small crates is much better.
5112 * rustpkg has received many improvements.
5113 * rustpkg supports git tags as package IDs.
5114 * rustpkg builds into target-specific directories so it can be used for
5116 * The number of concurrent test tasks is controlled by the environment
5117 variable RUST_TEST_TASKS.
5118 * The test harness can now report metrics for benchmarks.
5119 * All tools have man pages.
5120 * Programs compiled with `--test` now support the `-h` and `--help` flags.
5121 * The runtime uses jemalloc for allocations.
5122 * Segmented stacks are temporarily disabled as part of the transition to
5123 the new runtime. Stack overflows are possible!
5124 * A new documentation backend, rustdoc_ng, is available for use. It is
5125 still invoked through the normal `rustdoc` command.
5128 Version 0.7 (2013-07-03)
5129 =======================
5131 * ~2000 changes, numerous bugfixes
5134 * `impl`s no longer accept a visibility qualifier. Put them on methods
5136 * The borrow checker has been rewritten with flow-sensitivity, fixing
5137 many bugs and inconveniences.
5138 * The `self` parameter no longer implicitly means `&'self self`,
5139 and can be explicitly marked with a lifetime.
5140 * Overloadable compound operators (`+=`, etc.) have been temporarily
5141 removed due to bugs.
5142 * The `for` loop protocol now requires `for`-iterators to return `bool`
5143 so they compose better.
5144 * The `Durable` trait is replaced with the `'static` bounds.
5145 * Trait default methods work more often.
5146 * Structs with the `#[packed]` attribute have byte alignment and
5147 no padding between fields.
5148 * Type parameters bound by `Copy` must now be copied explicitly with
5150 * It is now illegal to move out of a dereferenced unsafe pointer.
5151 * `Option<~T>` is now represented as a nullable pointer.
5152 * `@mut` does dynamic borrow checks correctly.
5153 * The `main` function is only detected at the topmost level of the crate.
5154 The `#[main]` attribute is still valid anywhere.
5155 * Struct fields may no longer be mutable. Use inherited mutability.
5156 * The `#[no_send]` attribute makes a type that would otherwise be
5158 * The `#[no_freeze]` attribute makes a type that would otherwise be
5160 * Unbounded recursion will abort the process after reaching the limit
5161 specified by the `RUST_MAX_STACK` environment variable (default: 1GB).
5162 * The `vecs_implicitly_copyable` lint mode has been removed. Vectors
5163 are never implicitly copyable.
5164 * `#[static_assert]` makes compile-time assertions about static bools.
5165 * At long last, 'argument modes' no longer exist.
5166 * The rarely used `use mod` statement no longer exists.
5169 * `fail!` and `assert!` accept `~str`, `&'static str` or `fmt!`-style
5171 * `Encodable`, `Decodable`, `Ord`, `TotalOrd`, `TotalEq`, `DeepClone`,
5172 `Rand`, `Zero` and `ToStr` can all be automatically derived with
5174 * The `bytes!` macro returns a vector of bytes for string, u8, char,
5175 and unsuffixed integer literals.
5178 * The `core` crate was renamed to `std`.
5179 * The `std` crate was renamed to `extra`.
5180 * More and improved documentation.
5181 * std: `iterator` module for external iterator objects.
5182 * Many old-style (internal, higher-order function) iterators replaced by
5183 implementations of `Iterator`.
5184 * std: Many old internal vector and string iterators,
5185 incl. `any`, `all`. removed.
5186 * std: The `finalize` method of `Drop` renamed to `drop`.
5187 * std: The `drop` method now takes `&mut self` instead of `&self`.
5188 * std: The prelude no longer reexports any modules, only types and traits.
5189 * std: Prelude additions: `print`, `println`, `FromStr`, `ApproxEq`, `Equiv`,
5190 `Iterator`, `IteratorUtil`, many numeric traits, many tuple traits.
5191 * std: New numeric traits: `Fractional`, `Real`, `RealExt`, `Integer`, `Ratio`,
5192 `Algebraic`, `Trigonometric`, `Exponential`, `Primitive`.
5193 * std: Tuple traits and accessors defined for up to 12-tuples, e.g.
5194 `(0, 1, 2).n2()` or `(0, 1, 2).n2_ref()`.
5195 * std: Many types implement `Clone`.
5196 * std: `path` type renamed to `Path`.
5197 * std: `mut` module and `Mut` type removed.
5198 * std: Many standalone functions removed in favor of methods and iterators
5199 in `vec`, `str`. In the future methods will also work as functions.
5200 * std: `reinterpret_cast` removed. Use `transmute`.
5201 * std: ascii string handling in `std::ascii`.
5202 * std: `Rand` is implemented for ~/@.
5203 * std: `run` module for spawning processes overhauled.
5204 * std: Various atomic types added to `unstable::atomic`.
5205 * std: Various types implement `Zero`.
5206 * std: `LinearMap` and `LinearSet` renamed to `HashMap` and `HashSet`.
5207 * std: Borrowed pointer functions moved from `ptr` to `borrow`.
5208 * std: Added `os::mkdir_recursive`.
5209 * std: Added `os::glob` function performs filesystems globs.
5210 * std: `FuzzyEq` renamed to `ApproxEq`.
5211 * std: `Map` now defines `pop` and `swap` methods.
5212 * std: `Cell` constructors converted to static methods.
5213 * extra: `rc` module adds the reference counted pointers, `Rc` and `RcMut`.
5214 * extra: `flate` module moved from `std` to `extra`.
5215 * extra: `fileinput` module for iterating over a series of files.
5216 * extra: `Complex` number type and `complex` module.
5217 * extra: `Rational` number type and `rational` module.
5218 * extra: `BigInt`, `BigUint` implement numeric and comparison traits.
5219 * extra: `term` uses terminfo now, is more correct.
5220 * extra: `arc` functions converted to methods.
5221 * extra: Implementation of fixed output size variations of SHA-2.
5224 * `unused_variable` lint mode for unused variables (default: warn).
5225 * `unused_unsafe` lint mode for detecting unnecessary `unsafe` blocks
5227 * `unused_mut` lint mode for identifying unused `mut` qualifiers
5229 * `dead_assignment` lint mode for unread variables (default: warn).
5230 * `unnecessary_allocation` lint mode detects some heap allocations that are
5231 immediately borrowed so could be written without allocating (default: warn).
5232 * `missing_doc` lint mode (default: allow).
5233 * `unreachable_code` lint mode (default: warn).
5234 * The `rusti` command has been rewritten and a number of bugs addressed.
5235 * rustc outputs in color on more terminals.
5236 * rustc accepts a `--link-args` flag to pass arguments to the linker.
5237 * rustc accepts a `-Z print-link-args` flag for debugging linkage.
5238 * Compiling with `-g` will make the binary record information about
5239 dynamic borrowcheck failures for debugging.
5240 * rustdoc has a nicer stylesheet.
5241 * Various improvements to rustdoc.
5242 * Improvements to rustpkg (see the detailed release notes).
5245 Version 0.6 (2013-04-03)
5246 ========================
5248 * ~2100 changes, numerous bugfixes
5251 * The self type parameter in traits is now spelled `Self`
5252 * The `self` parameter in trait and impl methods must now be explicitly
5253 named (for example: `fn f(&self) { }`). Implicit self is deprecated.
5254 * Static methods no longer require the `static` keyword and instead
5255 are distinguished by the lack of a `self` parameter
5256 * Replaced the `Durable` trait with the `'static` lifetime
5257 * The old closure type syntax with the trailing sigil has been
5258 removed in favor of the more consistent leading sigil
5259 * `super` is a keyword, and may be prefixed to paths
5260 * Trait bounds are separated with `+` instead of whitespace
5261 * Traits are implemented with `impl Trait for Type`
5262 instead of `impl Type: Trait`
5263 * Lifetime syntax is now `&'l foo` instead of `&l/foo`
5264 * The `export` keyword has finally been removed
5265 * The `move` keyword has been removed (see "Semantic changes")
5266 * The interior mutability qualifier on vectors, `[mut T]`, has been
5267 removed. Use `&mut [T]`, etc.
5268 * `mut` is no longer valid in `~mut T`. Use inherited mutability
5269 * `fail` is no longer a keyword. Use `fail!()`
5270 * `assert` is no longer a keyword. Use `assert!()`
5271 * `log` is no longer a keyword. use `debug!`, etc.
5272 * 1-tuples may be represented as `(T,)`
5273 * Struct fields may no longer be `mut`. Use inherited mutability,
5274 `@mut T`, `core::mut` or `core::cell`
5275 * `extern mod { ... }` is no longer valid syntax for foreign
5276 function modules. Use extern blocks: `extern { ... }`
5277 * Newtype enums removed. Use tuple-structs.
5278 * Trait implementations no longer support visibility modifiers
5279 * Pattern matching over vectors improved and expanded
5280 * `const` renamed to `static` to correspond to lifetime name,
5281 and make room for future `static mut` unsafe mutable globals.
5282 * Replaced `#[deriving_eq]` with `#[deriving(Eq)]`, etc.
5283 * `Clone` implementations can be automatically generated with
5284 `#[deriving(Clone)]`
5285 * Casts to traits must use a pointer sigil, e.g. `@foo as @Bar`
5286 instead of `foo as Bar`.
5287 * Fixed length vector types are now written as `[int, .. 3]`
5288 instead of `[int * 3]`.
5289 * Fixed length vector types can express the length as a constant
5290 expression. (ex: `[int, .. GL_BUFFER_SIZE - 2]`)
5293 * Types with owned pointers or custom destructors move by default,
5294 eliminating the `move` keyword
5295 * All foreign functions are considered unsafe
5296 * &mut is now unaliasable
5297 * Writes to borrowed @mut pointers are prevented dynamically
5299 * The name of the main function can be customized using #[main]
5300 * The default type of an inferred closure is &fn instead of @fn
5301 * `use` statements may no longer be "chained" - they cannot import
5302 identifiers imported by previous `use` statements
5303 * `use` statements are crate relative, importing from the "top"
5304 of the crate by default. Paths may be prefixed with `super::`
5305 or `self::` to change the search behavior.
5306 * Method visibility is inherited from the implementation declaration
5307 * Structural records have been removed
5308 * Many more types can be used in static items, including enums
5309 'static-lifetime pointers and vectors
5310 * Pattern matching over vectors improved and expanded
5311 * Typechecking of closure types has been overhauled to
5312 improve inference and eliminate unsoundness
5313 * Macros leave scope at the end of modules, unless that module is
5314 tagged with #[macro_escape]
5317 * Added big integers to `std::bigint`
5318 * Removed `core::oldcomm` module
5319 * Added pipe-based `core::comm` module
5320 * Numeric traits have been reorganized under `core::num`
5321 * `vec::slice` finally returns a slice
5322 * `debug!` and friends don't require a format string, e.g. `debug!(Foo)`
5323 * Containers reorganized around traits in `core::container`
5324 * `core::dvec` removed, `~[T]` is a drop-in replacement
5325 * `core::send_map` renamed to `core::hashmap`
5326 * `std::map` removed; replaced with `core::hashmap`
5327 * `std::treemap` reimplemented as an owned balanced tree
5328 * `std::deque` and `std::smallintmap` reimplemented as owned containers
5329 * `core::trie` added as a fast ordered map for integer keys
5330 * Set types added to `core::hashmap`, `core::trie` and `std::treemap`
5331 * `Ord` split into `Ord` and `TotalOrd`. `Ord` is still used to
5332 overload the comparison operators, whereas `TotalOrd` is used
5333 by certain container types
5336 * Replaced the 'cargo' package manager with 'rustpkg'
5337 * Added all-purpose 'rust' tool
5338 * `rustc --test` now supports benchmarks with the `#[bench]` attribute
5339 * rustc now *attempts* to offer spelling suggestions
5340 * Improved support for ARM and Android
5341 * Preliminary MIPS backend
5342 * Improved foreign function ABI implementation for x86, x86_64
5343 * Various memory usage improvements
5344 * Rust code may be embedded in foreign code under limited circumstances
5345 * Inline assembler supported by new asm!() syntax extension.
5348 Version 0.5 (2012-12-21)
5349 ===========================
5351 * ~900 changes, numerous bugfixes
5354 * Removed `<-` move operator
5355 * Completed the transition from the `#fmt` extension syntax to `fmt!`
5356 * Removed old fixed length vector syntax - `[T]/N`
5357 * New token-based quasi-quoters, `quote_tokens!`, `quote_expr!`, etc.
5358 * Macros may now expand to items and statements
5359 * `a.b()` is always parsed as a method call, never as a field projection
5360 * `Eq` and `IterBytes` implementations can be automatically generated
5361 with `#[deriving_eq]` and `#[deriving_iter_bytes]` respectively
5362 * Removed the special crate language for `.rc` files
5363 * Function arguments may consist of any irrefutable pattern
5366 * `&` and `~` pointers may point to objects
5367 * Tuple structs - `struct Foo(Bar, Baz)`. Will replace newtype enums.
5368 * Enum variants may be structs
5369 * Destructors can be added to all nominal types with the Drop trait
5370 * Structs and nullary enum variants may be constants
5371 * Values that cannot be implicitly copied are now automatically moved
5372 without writing `move` explicitly
5373 * `&T` may now be coerced to `*T`
5374 * Coercions happen in `let` statements as well as function calls
5375 * `use` statements now take crate-relative paths
5376 * The module and type namespaces have been merged so that static
5377 method names can be resolved under the trait in which they are
5380 * Improved support for language features
5381 * Trait inheritance works in many scenarios
5382 * More support for explicit self arguments in methods - `self`, `&self`
5383 `@self`, and `~self` all generally work as expected
5384 * Static methods work in more situations
5385 * Experimental: Traits may declare default methods for the implementations
5389 * New condition handling system in `core::condition`
5390 * Timsort added to `std::sort`
5391 * New priority queue, `std::priority_queue`
5392 * Pipes for serializable types, `std::flatpipes'
5393 * Serialization overhauled to be trait-based
5394 * Expanded `getopts` definitions
5395 * Moved futures to `std`
5396 * More functions are pure now
5397 * `core::comm` renamed to `oldcomm`. Still deprecated
5398 * `rustdoc` and `cargo` are libraries now
5401 * Added a preliminary REPL, `rusti`
5402 * License changed from MIT to dual MIT/APL2
5405 Version 0.4 (2012-10-15)
5406 ==========================
5408 * ~2000 changes, numerous bugfixes
5411 * All keywords are now strict and may not be used as identifiers anywhere
5412 * Keyword removal: 'again', 'import', 'check', 'new', 'owned', 'send',
5413 'of', 'with', 'to', 'class'.
5414 * Classes are replaced with simpler structs
5415 * Explicit method self types
5416 * `ret` became `return` and `alt` became `match`
5417 * `import` is now `use`; `use is now `extern mod`
5418 * `extern mod { ... }` is now `extern { ... }`
5419 * `use mod` is the recommended way to import modules
5420 * `pub` and `priv` replace deprecated export lists
5421 * The syntax of `match` pattern arms now uses fat arrow (=>)
5422 * `main` no longer accepts an args vector; use `os::args` instead
5425 * Trait implementations are now coherent, ala Haskell typeclasses
5426 * Trait methods may be static
5427 * Argument modes are deprecated
5428 * Borrowed pointers are much more mature and recommended for use
5429 * Strings and vectors in the static region are stored in constant memory
5430 * Typestate was removed
5431 * Resolution rewritten to be more reliable
5432 * Support for 'dual-mode' data structures (freezing and thawing)
5435 * Most binary operators can now be overloaded via the traits in
5437 * `std::net::url` for representing URLs
5438 * Sendable hash maps in `core::send_map`
5439 * `core::task' gained a (currently unsafe) task-local storage API
5442 * An efficient new intertask communication primitive called the pipe,
5443 along with a number of higher-level channel types, in `core::pipes`
5444 * `std::arc`, an atomically reference counted, immutable, shared memory
5446 * `std::sync`, various exotic synchronization tools based on arcs and pipes
5447 * Futures are now based on pipes and sendable
5448 * More robust linked task failure
5449 * Improved task builder API
5452 * Improved error reporting
5453 * Preliminary JIT support
5454 * Preliminary work on precise GC
5455 * Extensive architectural improvements to rustc
5456 * Begun a transition away from buggy C++-based reflection (shape) code to
5457 Rust-based (visitor) code
5458 * All hash functions and tables converted to secure, randomized SipHash
5461 Version 0.3 (2012-07-12)
5462 ========================
5464 * ~1900 changes, numerous bugfixes
5466 * New coding conveniences
5467 * Integer-literal suffix inference
5468 * Per-item control over warnings, errors
5469 * #[cfg(windows)] and #[cfg(unix)] attributes
5470 * Documentation comments
5471 * More compact closure syntax
5472 * 'do' expressions for treating higher-order functions as
5474 * *-patterns (wildcard extended to all constructor fields)
5477 * Name resolution pass and exhaustiveness checker rewritten
5478 * Region pointers and borrow checking supersede alias
5480 * Init-ness checking is now provided by a region-based liveness
5481 pass instead of the typestate pass; same for last-use analysis
5482 * Extensive work on region pointers
5484 * Experimental new language features
5485 * Slices and fixed-size, interior-allocated vectors
5486 * #!-comments for lang versioning, shell execution
5487 * Destructors and iface implementation for classes;
5488 type-parameterized classes and class methods
5489 * 'const' type kind for types that can be used to implement
5490 shared-memory concurrency patterns
5494 * Removal of various obsolete features
5495 * Keywords: 'be', 'prove', 'syntax', 'note', 'mutable', 'bind',
5496 'crust', 'native' (now 'extern'), 'cont' (now 'again')
5498 * Constructs: do-while loops ('do' repurposed), fn binding,
5499 resources (replaced by destructors)
5501 * Compiler reorganization
5502 * Syntax-layer of compiler split into separate crate
5503 * Clang (from LLVM project) integrated into build
5504 * Typechecker split into sub-modules
5507 * New time functions
5508 * Extension methods for many built-in types
5509 * Arc: atomic-refcount read-only / exclusive-use shared cells
5510 * Par: parallel map and search routines
5511 * Extensive work on libuv interface
5512 * Much vector code moved to libraries
5513 * Syntax extensions: #line, #col, #file, #mod, #stringify,
5514 #include, #include_str, #include_bin
5517 * Cargo automatically resolves dependencies
5520 Version 0.2 (2012-03-29)
5521 =========================
5523 * >1500 changes, numerous bugfixes
5525 * New docs and doc tooling
5527 * New port: FreeBSD x86_64
5529 * Compilation model enhancements
5530 * Generics now specialized, multiply instantiated
5531 * Functions now inlined across separate crates
5533 * Scheduling, stack and threading fixes
5534 * Noticeably improved message-passing performance
5535 * Explicit schedulers
5539 * Experimental new language features
5540 * Operator overloading
5544 * Various language extensions
5545 * C-callback function types: 'crust fn ...'
5546 * Infinite-loop construct: 'loop { ... }'
5547 * Shorten 'mutable' to 'mut'
5548 * Required mutable-local qualifier: 'let mut ...'
5549 * Basic glob-exporting: 'export foo::*;'
5550 * Alt now exhaustive, 'alt check' for runtime-checked
5551 * Block-function form of 'for' loop, with 'break' and 'ret'.
5554 * AST quasi-quote syntax extension
5555 * Revived libuv interface
5556 * New modules: core::{future, iter}, std::arena
5557 * Merged per-platform std::{os*, fs*} to core::{libc, os}
5558 * Extensive cleanup, regularization in libstd, libcore
5561 Version 0.1 (2012-01-20)
5562 ===============================
5564 * Most language features work, including:
5565 * Unique pointers, unique closures, move semantics
5566 * Interface-constrained generics
5567 * Static interface dispatch
5569 * Multithread task scheduling
5570 * Typestate predicates
5571 * Failure unwinding, destructors
5572 * Pattern matching and destructuring assignment
5573 * Lightweight block-lambda syntax
5574 * Preliminary macro-by-example
5576 * Compiler works with the following configurations:
5577 * Linux: x86 and x86_64 hosts and targets
5578 * macOS: x86 and x86_64 hosts and targets
5579 * Windows: x86 hosts and targets
5581 * Cross compilation / multi-target configuration supported.
5583 * Preliminary API-documentation and package-management tools included.
5587 * Documentation is incomplete.
5589 * Performance is below intended target.
5591 * Standard library APIs are subject to extensive change, reorganization.
5593 * Language-level versioning is not yet operational - future code will