1 Version 1.17.0 (2017-04-27)
2 ===========================
7 * [The lifetime of statics and consts defaults to `'static`][39265]. [RFC 1623]
8 * [Fields of structs may be initialized without duplicating the field/variable
9 names][39761]. [RFC 1682]
10 * [`Self` may be included in the `where` clause of `impls`][38864]. [RFC 1647]
11 * [When coercing to an unsized type lifetimes must be equal][40319]. That is,
12 there is no subtyping between `T` and `U` when `T: Unsize<U>`. For example,
13 coercing `&mut [&'a X; N]` to `&mut [&'b X]` requires `'a` be equal to
15 * [Values passed to the indexing operator, `[]`, automatically coerce][40166]
16 * [Static variables may contain references to other statics][40027]
21 * [Exit quickly on only `--emit dep-info`][40336]
22 * [Make `-C relocation-model` more correctly determine whether the linker
23 creates a position-independent executable][40245]
24 * [Add `-C overflow-checks` to directly control whether integer overflow
26 * [The rustc type checker now checks items on demand instead of in a single
27 in-order pass][40008]. This is mostly an internal refactoring in support of
28 future work, including incremental type checking, but also resolves [RFC
29 1647], allowing `Self` to appear in `impl` `where` clauses.
30 * [Optimize vtable loads][39995]
31 * [Turn off vectorization for Emscripten targets][39990]
32 * [Provide suggestions for unknown macros imported with `use`][39953]
33 * [Fix ICEs in path resolution][39939]
34 * [Strip exception handling code on Emscripten when `panic=abort`][39193]
35 * [Add clearer error message using `&str + &str`][39116]
47 * [`Ordering::then_with`]
49 * [`BTreeMap::range_mut`]
50 * [`collections::Bound`]
52 * [`ptr::read_unaligned`]
53 * [`ptr::write_unaligned`]
54 * [`Result::expect_err`]
57 * [`Cell::into_inner`]
63 * [`BTreeMap` and `BTreeSet` can iterate over ranges][27787]
64 * [`Cell` can store non-`Copy` types][39793]. [RFC 1651]
65 * [`String` implements `FromIterator<&char>`][40028]
66 * `Box` [implements][40009] a number of new conversions:
67 `From<Box<str>> for String`,
68 `From<Box<[T]>> for Vec<T>`,
69 `From<Box<CStr>> for CString`,
70 `From<Box<OsStr>> for OsString`,
71 `From<Box<Path>> for PathBuf`,
72 `Into<Box<str>> for String`,
73 `Into<Box<[T]>> for Vec<T>`,
74 `Into<Box<CStr>> for CString`,
75 `Into<Box<OsStr>> for OsString`,
76 `Into<Box<Path>> for PathBuf`,
77 `Default for Box<str>`,
78 `Default for Box<CStr>`,
79 `Default for Box<OsStr>`,
80 `From<&CStr> for Box<CStr>`,
81 `From<&OsStr> for Box<OsStr>`,
82 `From<&Path> for Box<Path>`
83 * [`ffi::FromBytesWithNulError` implements `Error` and `Display`][39960]
84 * [Specialize `PartialOrd<A> for [A] where A: Ord`][39642]
85 * [Slightly optimize `slice::sort`][39538]
86 * [Add `ToString` trait specialization for `Cow<'a, str>` and `String`][39440]
87 * [`Box<[T]>` implements `From<&[T]> where T: Copy`,
88 `Box<str>` implements `From<&str>`][39438]
89 * [`IpAddr` implements `From` for various arrays. `SocketAddr` implements
90 `From<(I, u16)> where I: Into<IpAddr>`][39372]
91 * [`format!` estimates the needed capacity before writing a string][39356]
92 * [Support unprivileged symlink creation in Windows][38921]
93 * [`PathBuf` implements `Default`][38764]
94 * [Implement `PartialEq<[A]>` for `VecDeque<A>`][38661]
95 * [`HashMap` resizes adaptively][38368] to guard against DOS attacks
96 and poor hash functions.
101 * [Add `cargo check --all`][cargo/3731]
102 * [Add an option to ignore SSL revocation checking][cargo/3699]
103 * [Add `cargo run --package`][cargo/3691]
104 * [Add `required_features`][cargo/3667]
105 * [Assume `build.rs` is a build script][cargo/3664]
106 * [Find workspace via `workspace_root` link in containing member][cargo/3562]
111 * [Documentation is rendered with mdbook instead of the obsolete, in-tree
113 * [The "Unstable Book" documents nightly-only features][ubook]
114 * [Improve the style of the sidebar in rustdoc output][40265]
115 * [Configure build correctly on 64-bit CPU's with the armhf ABI][40261]
116 * [Fix MSP430 breakage due to `i128`][40257]
117 * [Preliminary Solaris/SPARCv9 support][39903]
118 * [`rustc` is linked statically on Windows MSVC targets][39837], allowing it to
119 run without installing the MSVC runtime.
120 * [`rustdoc --test` includes file names in test names][39788]
121 * This release includes builds of `std` for `sparc64-unknown-linux-gnu`,
122 `aarch64-unknown-linux-fuchsia`, and `x86_64-unknown-linux-fuchsia`.
123 * [Initial support for `aarch64-unknown-freebsd`][39491]
124 * [Initial support for `i686-unknown-netbsd`][39426]
125 * [This release no longer includes the old makefile build system][39431]. Rust
126 is built with a custom build system, written in Rust, and with Cargo.
127 * [Add Debug implementations for libcollection structs][39002]
128 * [`TypeId` implements `PartialOrd` and `Ord`][38981]
129 * [`--test-threads=0` produces an error][38945]
130 * [`rustup` installs documentation by default][40526]
131 * [The Rust source includes NatVis visualizations][39843]. These can be used by
132 WinDbg and Visual Studio to improve the debugging experience.
137 * [Rust 1.17 does not correctly detect the MSVC 2017 linker][38584]. As a
138 workaround, either use MSVC 2015 or run vcvars.bat.
139 * [When coercing to an unsized type lifetimes must be equal][40319]. That is,
140 disallow subtyping between `T` and `U` when `T: Unsize<U>`, e.g. coercing
141 `&mut [&'a X; N]` to `&mut [&'b X]` requires `'a` be equal to `'b`. Soundness
143 * [`format!` and `Display::to_string` panic if an underlying formatting
144 implementation returns an error][40117]. Previously the error was silently
145 ignored. It is incorrect for `write_fmt` to return an error when writing
147 * [In-tree crates are verified to be unstable][39851]. Previously, some minor
148 crates were marked stable and could be accessed from the stable toolchain.
149 * [Rust git source no longer includes vendored crates][39728]. Those that need
150 to build with vendored crates should build from release tarballs.
151 * [Fix inert attributes from `proc_macro_derives`][39572]
152 * [During crate resolution, rustc prefers a crate in the sysroot if two crates
153 are otherwise identical][39518]. Unlikely to be encountered outside the Rust
155 * [Fixed bugs around how type inference interacts with dead-code][39485]. The
156 existing code generally ignores the type of dead-code unless a type-hint is
157 provided; this can cause surprising inference interactions particularly around
158 defaulting. The new code uniformly ignores the result type of dead-code.
159 * [Tuple-struct constructors with private fields are no longer visible][38932]
160 * [Lifetime parameters that do not appear in the arguments are now considered
161 early-bound][38897], resolving a soundness bug (#[32330]). The
162 `hr_lifetime_in_assoc_type` future-compatibility lint has been in effect since
164 * [rustdoc: fix doctests with non-feature crate attributes][38161]
165 * [Make transmuting from fn item types to pointer-sized types a hard
168 [27787]: https://github.com/rust-lang/rust/issues/27787
169 [32330]: https://github.com/rust-lang/rust/issues/32330
170 [34198]: https://github.com/rust-lang/rust/pull/34198
171 [38161]: https://github.com/rust-lang/rust/pull/38161
172 [38368]: https://github.com/rust-lang/rust/pull/38368
173 [38584]: https://github.com/rust-lang/rust/issues/38584
174 [38661]: https://github.com/rust-lang/rust/pull/38661
175 [38764]: https://github.com/rust-lang/rust/pull/38764
176 [38864]: https://github.com/rust-lang/rust/issues/38864
177 [38897]: https://github.com/rust-lang/rust/pull/38897
178 [38921]: https://github.com/rust-lang/rust/pull/38921
179 [38932]: https://github.com/rust-lang/rust/pull/38932
180 [38945]: https://github.com/rust-lang/rust/pull/38945
181 [38981]: https://github.com/rust-lang/rust/pull/38981
182 [39002]: https://github.com/rust-lang/rust/pull/39002
183 [39116]: https://github.com/rust-lang/rust/pull/39116
184 [39193]: https://github.com/rust-lang/rust/pull/39193
185 [39265]: https://github.com/rust-lang/rust/pull/39265
186 [39356]: https://github.com/rust-lang/rust/pull/39356
187 [39372]: https://github.com/rust-lang/rust/pull/39372
188 [39426]: https://github.com/rust-lang/rust/pull/39426
189 [39431]: https://github.com/rust-lang/rust/pull/39431
190 [39438]: https://github.com/rust-lang/rust/pull/39438
191 [39440]: https://github.com/rust-lang/rust/pull/39440
192 [39485]: https://github.com/rust-lang/rust/pull/39485
193 [39491]: https://github.com/rust-lang/rust/pull/39491
194 [39518]: https://github.com/rust-lang/rust/pull/39518
195 [39538]: https://github.com/rust-lang/rust/pull/39538
196 [39572]: https://github.com/rust-lang/rust/pull/39572
197 [39633]: https://github.com/rust-lang/rust/pull/39633
198 [39642]: https://github.com/rust-lang/rust/pull/39642
199 [39728]: https://github.com/rust-lang/rust/pull/39728
200 [39761]: https://github.com/rust-lang/rust/pull/39761
201 [39788]: https://github.com/rust-lang/rust/pull/39788
202 [39793]: https://github.com/rust-lang/rust/pull/39793
203 [39837]: https://github.com/rust-lang/rust/pull/39837
204 [39843]: https://github.com/rust-lang/rust/pull/39843
205 [39851]: https://github.com/rust-lang/rust/pull/39851
206 [39903]: https://github.com/rust-lang/rust/pull/39903
207 [39939]: https://github.com/rust-lang/rust/pull/39939
208 [39953]: https://github.com/rust-lang/rust/pull/39953
209 [39960]: https://github.com/rust-lang/rust/pull/39960
210 [39990]: https://github.com/rust-lang/rust/pull/39990
211 [39995]: https://github.com/rust-lang/rust/pull/39995
212 [40008]: https://github.com/rust-lang/rust/pull/40008
213 [40009]: https://github.com/rust-lang/rust/pull/40009
214 [40027]: https://github.com/rust-lang/rust/pull/40027
215 [40028]: https://github.com/rust-lang/rust/pull/40028
216 [40037]: https://github.com/rust-lang/rust/pull/40037
217 [40117]: https://github.com/rust-lang/rust/pull/40117
218 [40166]: https://github.com/rust-lang/rust/pull/40166
219 [40245]: https://github.com/rust-lang/rust/pull/40245
220 [40257]: https://github.com/rust-lang/rust/pull/40257
221 [40261]: https://github.com/rust-lang/rust/pull/40261
222 [40265]: https://github.com/rust-lang/rust/pull/40265
223 [40319]: https://github.com/rust-lang/rust/pull/40319
224 [40336]: https://github.com/rust-lang/rust/pull/40336
225 [40526]: https://github.com/rust-lang/rust/pull/40526
226 [RFC 1623]: https://github.com/rust-lang/rfcs/blob/master/text/1623-static.md
227 [RFC 1647]: https://github.com/rust-lang/rfcs/blob/master/text/1647-allow-self-in-where-clauses.md
228 [RFC 1651]: https://github.com/rust-lang/rfcs/blob/master/text/1651-movecell.md
229 [RFC 1682]: https://github.com/rust-lang/rfcs/blob/master/text/1682-field-init-shorthand.md
230 [`Arc::from_raw`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.from_raw
231 [`Arc::into_raw`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.into_raw
232 [`Arc::ptr_eq`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.ptr_eq
233 [`BTreeMap::range_mut`]: https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.range_mut
234 [`BTreeMap::range`]: https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.range
235 [`Cell::into_inner`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.into_inner
236 [`Cell::replace`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.replace
237 [`Cell::swap`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.swap
238 [`Cell::take`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.take
239 [`Ordering::then_with`]: https://doc.rust-lang.org/std/cmp/enum.Ordering.html#method.then_with
240 [`Ordering::then`]: https://doc.rust-lang.org/std/cmp/enum.Ordering.html#method.then
241 [`Rc::from_raw`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.from_raw
242 [`Rc::into_raw`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.into_raw
243 [`Rc::ptr_eq`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.ptr_eq
244 [`Result::expect_err`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.expect_err
245 [`collections::Bound`]: https://doc.rust-lang.org/std/collections/enum.Bound.html
246 [`process::abort`]: https://doc.rust-lang.org/std/process/fn.abort.html
247 [`ptr::read_unaligned`]: https://doc.rust-lang.org/std/ptr/fn.read_unaligned.html
248 [`ptr::write_unaligned`]: https://doc.rust-lang.org/std/ptr/fn.write_unaligned.html
249 [cargo/3562]: https://github.com/rust-lang/cargo/pull/3562
250 [cargo/3664]: https://github.com/rust-lang/cargo/pull/3664
251 [cargo/3667]: https://github.com/rust-lang/cargo/pull/3667
252 [cargo/3691]: https://github.com/rust-lang/cargo/pull/3691
253 [cargo/3699]: https://github.com/rust-lang/cargo/pull/3699
254 [cargo/3731]: https://github.com/rust-lang/cargo/pull/3731
255 [mdbook]: https://crates.io/crates/mdbook
256 [ubook]: https://doc.rust-lang.org/unstable-book/
259 Version 1.16.0 (2017-03-16)
260 ===========================
265 * [The compiler's `dead_code` lint now accounts for type aliases][38051].
266 * [Uninhabitable enums (those without any variants) no longer permit wildcard
267 match patterns][38069]
268 * [Clean up semantics of `self` in an import list][38313]
269 * [`Self` may appear in `impl` headers][38920]
270 * [`Self` may appear in struct expressions][39282]
275 * [`rustc` now supports `--emit=metadata`, which causes rustc to emit
276 a `.rmeta` file containing only crate metadata][38571]. This can be
277 used by tools like the Rust Language Service to perform
278 metadata-only builds.
279 * [Levenshtein based typo suggestions now work in most places, while
280 previously they worked only for fields and sometimes for local
281 variables][38927]. Together with the overhaul of "no
282 resolution"/"unexpected resolution" errors (#[38154]) they result in
283 large and systematic improvement in resolution diagnostics.
284 * [Fix `transmute::<T, U>` where `T` requires a bigger alignment than
286 * [rustc: use -Xlinker when specifying an rpath with ',' in it][38798]
287 * [`rustc` no longer attempts to provide "consider using an explicit
288 lifetime" suggestions][37057]. They were inaccurate.
293 * [`VecDeque::truncate`]
294 * [`VecDeque::resize`]
295 * [`String::insert_str`]
296 * [`Duration::checked_add`]
297 * [`Duration::checked_sub`]
298 * [`Duration::checked_div`]
299 * [`Duration::checked_mul`]
302 * [`SocketAddr::is_ipv4`]
303 * [`SocketAddr::is_ipv6`]
304 * [`IpAddr::is_ipv4`]
305 * [`IpAddr::is_ipv6`]
307 * [`Vec::dedup_by_key`]
308 * [`Result::unwrap_or_default`]
309 * [`<*const T>::wrapping_offset`]
310 * [`<*mut T>::wrapping_offset`]
311 * `CommandExt::creation_flags`
312 * [`File::set_permissions`]
313 * [`String::split_off`]
318 * [`[T]::binary_search` and `[T]::binary_search_by_key` now take
319 their argument by `Borrow` parameter][37761]
320 * [All public types in std implement `Debug`][38006]
321 * [`IpAddr` implements `From<Ipv4Addr>` and `From<Ipv6Addr>`][38327]
322 * [`Ipv6Addr` implements `From<[u16; 8]>`][38131]
323 * [Ctrl-Z returns from `Stdin.read()` when reading from the console on
325 * [std: Fix partial writes in `LineWriter`][38062]
326 * [std: Clamp max read/write sizes on Unix][38062]
327 * [Use more specific panic message for `&str` slicing errors][38066]
328 * [`TcpListener::set_only_v6` is deprecated][38304]. This
329 functionality cannot be achieved in std currently.
330 * [`writeln!`, like `println!`, now accepts a form with no string
331 or formatting arguments, to just print a newline][38469]
332 * [Implement `iter::Sum` and `iter::Product` for `Result`][38580]
333 * [Reduce the size of static data in `std_unicode::tables`][38781]
334 * [`char::EscapeDebug`, `EscapeDefault`, `EscapeUnicode`,
335 `CaseMappingIter`, `ToLowercase`, `ToUppercase`, implement
337 * [`Duration` implements `Sum`][38712]
338 * [`String` implements `ToSocketAddrs`][39048]
343 * [The `cargo check` command does a type check of a project without
344 building it][cargo/3296]
345 * [crates.io will display CI badges from Travis and AppVeyor, if
346 specified in Cargo.toml][cargo/3546]
347 * [crates.io will display categories listed in Cargo.toml][cargo/3301]
348 * [Compilation profiles accept integer values for `debug`, in addition
349 to `true` and `false`. These are passed to `rustc` as the value to
350 `-C debuginfo`][cargo/3534]
351 * [Implement `cargo --version --verbose`][cargo/3604]
352 * [All builds now output 'dep-info' build dependencies compatible with
353 make and ninja][cargo/3557]
354 * [Build all workspace members with `build --all`][cargo/3511]
355 * [Document all workspace members with `doc --all`][cargo/3515]
356 * [Path deps outside workspace are not members][cargo/3443]
361 * [`rustdoc` has a `--sysroot` argument that, like `rustc`, specifies
362 the path to the Rust implementation][38589]
363 * [The `armv7-linux-androideabi` target no longer enables NEON
364 extensions, per Google's ABI guide][38413]
365 * [The stock standard library can be compiled for Redox OS][38401]
366 * [Rust has initial SPARC support][38726]. Tier 3. No builds
368 * [Rust has experimental support for Nvidia PTX][38559]. Tier 3. No
370 * [Fix backtraces on i686-pc-windows-gnu by disabling FPO][39379]
375 * [Uninhabitable enums (those without any variants) no longer permit wildcard
376 match patterns][38069]
377 * In this release, references to uninhabited types can not be
378 pattern-matched. This was accidentally allowed in 1.15.
379 * [The compiler's `dead_code` lint now accounts for type aliases][38051].
380 * [Ctrl-Z returns from `Stdin.read()` when reading from the console on
382 * [Clean up semantics of `self` in an import list][38313]
384 [37057]: https://github.com/rust-lang/rust/pull/37057
385 [37761]: https://github.com/rust-lang/rust/pull/37761
386 [38006]: https://github.com/rust-lang/rust/pull/38006
387 [38051]: https://github.com/rust-lang/rust/pull/38051
388 [38062]: https://github.com/rust-lang/rust/pull/38062
389 [38062]: https://github.com/rust-lang/rust/pull/38622
390 [38066]: https://github.com/rust-lang/rust/pull/38066
391 [38069]: https://github.com/rust-lang/rust/pull/38069
392 [38131]: https://github.com/rust-lang/rust/pull/38131
393 [38154]: https://github.com/rust-lang/rust/pull/38154
394 [38274]: https://github.com/rust-lang/rust/pull/38274
395 [38304]: https://github.com/rust-lang/rust/pull/38304
396 [38313]: https://github.com/rust-lang/rust/pull/38313
397 [38314]: https://github.com/rust-lang/rust/pull/38314
398 [38327]: https://github.com/rust-lang/rust/pull/38327
399 [38401]: https://github.com/rust-lang/rust/pull/38401
400 [38413]: https://github.com/rust-lang/rust/pull/38413
401 [38469]: https://github.com/rust-lang/rust/pull/38469
402 [38559]: https://github.com/rust-lang/rust/pull/38559
403 [38571]: https://github.com/rust-lang/rust/pull/38571
404 [38580]: https://github.com/rust-lang/rust/pull/38580
405 [38589]: https://github.com/rust-lang/rust/pull/38589
406 [38670]: https://github.com/rust-lang/rust/pull/38670
407 [38712]: https://github.com/rust-lang/rust/pull/38712
408 [38726]: https://github.com/rust-lang/rust/pull/38726
409 [38781]: https://github.com/rust-lang/rust/pull/38781
410 [38798]: https://github.com/rust-lang/rust/pull/38798
411 [38909]: https://github.com/rust-lang/rust/pull/38909
412 [38920]: https://github.com/rust-lang/rust/pull/38920
413 [38927]: https://github.com/rust-lang/rust/pull/38927
414 [39048]: https://github.com/rust-lang/rust/pull/39048
415 [39282]: https://github.com/rust-lang/rust/pull/39282
416 [39379]: https://github.com/rust-lang/rust/pull/39379
417 [`<*const T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset
418 [`<*mut T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset
419 [`Duration::checked_add`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_add
420 [`Duration::checked_div`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_div
421 [`Duration::checked_mul`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_mul
422 [`Duration::checked_sub`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_sub
423 [`File::set_permissions`]: https://doc.rust-lang.org/std/fs/struct.File.html#method.set_permissions
424 [`IpAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv4
425 [`IpAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv6
426 [`Result::unwrap_or_default`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.unwrap_or_default
427 [`SocketAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv4
428 [`SocketAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv6
429 [`String::insert_str`]: https://doc.rust-lang.org/std/string/struct.String.html#method.insert_str
430 [`String::split_off`]: https://doc.rust-lang.org/std/string/struct.String.html#method.split_off
431 [`Vec::dedup_by_key`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by_key
432 [`Vec::dedup_by`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by
433 [`VecDeque::resize`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.resize
434 [`VecDeque::truncate`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.truncate
435 [`str::repeat`]: https://doc.rust-lang.org/std/primitive.str.html#method.repeat
436 [`str::replacen`]: https://doc.rust-lang.org/std/primitive.str.html#method.replacen
437 [cargo/3296]: https://github.com/rust-lang/cargo/pull/3296
438 [cargo/3301]: https://github.com/rust-lang/cargo/pull/3301
439 [cargo/3443]: https://github.com/rust-lang/cargo/pull/3443
440 [cargo/3511]: https://github.com/rust-lang/cargo/pull/3511
441 [cargo/3515]: https://github.com/rust-lang/cargo/pull/3515
442 [cargo/3534]: https://github.com/rust-lang/cargo/pull/3534
443 [cargo/3546]: https://github.com/rust-lang/cargo/pull/3546
444 [cargo/3557]: https://github.com/rust-lang/cargo/pull/3557
445 [cargo/3604]: https://github.com/rust-lang/cargo/pull/3604
446 [RFC 1623]: https://github.com/rust-lang/rfcs/blob/master/text/1623-static.md
449 Version 1.15.1 (2017-02-09)
450 ===========================
452 * [Fix IntoIter::as_mut_slice's signature][39466]
453 * [Compile compiler builtins with `-fPIC` on 32-bit platforms][39523]
455 [39466]: https://github.com/rust-lang/rust/pull/39466
456 [39523]: https://github.com/rust-lang/rust/pull/39523
459 Version 1.15.0 (2017-02-02)
460 ===========================
465 * Basic procedural macros allowing custom `#[derive]`, aka "macros 1.1", are
466 stable. This allows popular code-generating crates like Serde and Diesel to
467 work ergonomically. [RFC 1681].
468 * [Tuple structs may be empty. Unary and empty tuple structs may be instantiated
469 with curly braces][36868]. Part of [RFC 1506].
470 * [A number of minor changes to name resolution have been activated][37127].
471 They add up to more consistent semantics, allowing for future evolution of
472 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
473 details of what is different. The breaking changes here have been transitioned
474 through the [`legacy_imports`] lint since 1.14, with no known regressions.
475 * [In `macro_rules`, `path` fragments can now be parsed as type parameter
477 * [`?Sized` can be used in `where` clauses][37791]
478 * [There is now a limit on the size of monomorphized types and it can be
479 modified with the `#![type_size_limit]` crate attribute, similarly to
480 the `#![recursion_limit]` attribute][37789]
485 * [On Windows, the compiler will apply dllimport attributes when linking to
486 extern functions][37973]. Additional attributes and flags can control which
487 library kind is linked and its name. [RFC 1717].
488 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
489 * [The `--test` flag works with procedural macro crates][38107]
490 * [Fix `extern "aapcs" fn` ABI][37814]
491 * [The `-C no-stack-check` flag is deprecated][37636]. It does nothing.
492 * [The `format!` expander recognizes incorrect `printf` and shell-style
493 formatting directives and suggests the correct format][37613].
494 * [Only report one error for all unused imports in an import list][37456]
499 * [Avoid unnecessary `mk_ty` calls in `Ty::super_fold_with`][37705]
500 * [Avoid more unnecessary `mk_ty` calls in `Ty::super_fold_with`][37979]
501 * [Don't clone in `UnificationTable::probe`][37848]
502 * [Remove `scope_auxiliary` to cut RSS by 10%][37764]
503 * [Use small vectors in type walker][37760]
504 * [Macro expansion performance was improved][37701]
505 * [Change `HirVec<P<T>>` to `HirVec<T>` in `hir::Expr`][37642]
506 * [Replace FNV with a faster hash function][37229]
511 * [`std::iter::Iterator::min_by`]
512 * [`std::iter::Iterator::max_by`]
513 * [`std::os::*::fs::FileExt`]
514 * [`std::sync::atomic::Atomic*::get_mut`]
515 * [`std::sync::atomic::Atomic*::into_inner`]
516 * [`std::vec::IntoIter::as_slice`]
517 * [`std::vec::IntoIter::as_mut_slice`]
518 * [`std::sync::mpsc::Receiver::try_iter`]
519 * [`std::os::unix::process::CommandExt::before_exec`]
520 * [`std::rc::Rc::strong_count`]
521 * [`std::rc::Rc::weak_count`]
522 * [`std::sync::Arc::strong_count`]
523 * [`std::sync::Arc::weak_count`]
524 * [`std::char::encode_utf8`]
525 * [`std::char::encode_utf16`]
526 * [`std::cell::Ref::clone`]
527 * [`std::io::Take::into_inner`]
532 * [The standard sorting algorithm has been rewritten for dramatic performance
533 improvements][38192]. It is a hybrid merge sort, drawing influences from
534 Timsort. Previously it was a naive merge sort.
535 * [`Iterator::nth` no longer has a `Sized` bound][38134]
536 * [`Extend<&T>` is specialized for `Vec` where `T: Copy`][38182] to improve
538 * [`chars().count()` is much faster][37888] and so are [`chars().last()`
539 and `char_indices().last()`][37882]
540 * [Fix ARM Objective-C ABI in `std::env::args`][38146]
541 * [Chinese characters display correctly in `fmt::Debug`][37855]
542 * [Derive `Default` for `Duration`][37699]
543 * [Support creation of anonymous pipes on WinXP/2k][37677]
544 * [`mpsc::RecvTimeoutError` implements `Error`][37527]
545 * [Don't pass overlapped handles to processes][38835]
550 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
551 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
552 should instead check the variable at runtime with `std::env`. That the value
553 was set at build time was a bug, and incorrect when cross-compiling. This
554 change is known to cause breakage.
555 * [Add `--all` flag to `cargo test`][cargo/3221]
556 * [Compile statically against the MSVC CRT][cargo/3363]
557 * [Mix feature flags into fingerprint/metadata shorthash][cargo/3102]
558 * [Link OpenSSL statically on OSX][cargo/3311]
559 * [Apply new fingerprinting to build dir outputs][cargo/3310]
560 * [Test for bad path overrides with summaries][cargo/3336]
561 * [Require `cargo install --vers` to take a semver version][cargo/3338]
562 * [Fix retrying crate downloads for network errors][cargo/3348]
563 * [Implement string lookup for `build.rustflags` config key][cargo/3356]
564 * [Emit more info on --message-format=json][cargo/3319]
565 * [Assume `build.rs` in the same directory as `Cargo.toml` is a build script][cargo/3361]
566 * [Don't ignore errors in workspace manifest][cargo/3409]
567 * [Fix `--message-format JSON` when rustc emits non-JSON warnings][cargo/3410]
572 * [Test runners (binaries built with `--test`) now support a `--list` argument
573 that lists the tests it contains][38185]
574 * [Test runners now support a `--exact` argument that makes the test filter
575 match exactly, instead of matching only a substring of the test name][38181]
576 * [rustdoc supports a `--playground-url` flag][37763]
577 * [rustdoc provides more details about `#[should_panic]` errors][37749]
582 * [The Rust build system is now written in Rust][37817]. The Makefiles may
583 continue to be used in this release by passing `--disable-rustbuild` to the
584 configure script, but they will be deleted soon. Note that the new build
585 system uses a different on-disk layout that will likely affect any scripts
587 * [Rust supports i686-unknown-openbsd][38086]. Tier 3 support. No testing or
589 * [Rust supports the MSP430][37627]. Tier 3 support. No testing or releases.
590 * [Rust supports the ARMv5TE architecture][37615]. Tier 3 support. No testing or
596 * [A number of minor changes to name resolution have been activated][37127].
597 They add up to more consistent semantics, allowing for future evolution of
598 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
599 details of what is different. The breaking changes here have been transitioned
600 through the [`legacy_imports`] lint since 1.14, with no known regressions.
601 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
602 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
603 should instead check the variable at runtime with `std::env`. That the value
604 was set at build time was a bug, and incorrect when cross-compiling. This
605 change is known to cause breakage.
606 * [Higher-ranked lifetimes are no longer allowed to appear _only_ in associated
607 types][33685]. The [`hr_lifetime_in_assoc_type` lint] has been a warning since
608 1.10 and is now an error by default. It will become a hard error in the near
610 * [The semantics relating modules to file system directories are changing in
611 minor ways][37602]. This is captured in the new `legacy_directory_ownership`
612 lint, which is a warning in this release, and will become a hard error in the
614 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
615 * [Once `Peekable` peeks a `None` it will return that `None` without re-querying
616 the underlying iterator][37834]
618 ["changes"]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md#changes-to-name-resolution-rules
619 [33685]: https://github.com/rust-lang/rust/issues/33685
620 [36868]: https://github.com/rust-lang/rust/pull/36868
621 [37127]: https://github.com/rust-lang/rust/pull/37127
622 [37229]: https://github.com/rust-lang/rust/pull/37229
623 [37456]: https://github.com/rust-lang/rust/pull/37456
624 [37527]: https://github.com/rust-lang/rust/pull/37527
625 [37602]: https://github.com/rust-lang/rust/pull/37602
626 [37613]: https://github.com/rust-lang/rust/pull/37613
627 [37615]: https://github.com/rust-lang/rust/pull/37615
628 [37636]: https://github.com/rust-lang/rust/pull/37636
629 [37627]: https://github.com/rust-lang/rust/pull/37627
630 [37642]: https://github.com/rust-lang/rust/pull/37642
631 [37677]: https://github.com/rust-lang/rust/pull/37677
632 [37699]: https://github.com/rust-lang/rust/pull/37699
633 [37701]: https://github.com/rust-lang/rust/pull/37701
634 [37705]: https://github.com/rust-lang/rust/pull/37705
635 [37749]: https://github.com/rust-lang/rust/pull/37749
636 [37760]: https://github.com/rust-lang/rust/pull/37760
637 [37763]: https://github.com/rust-lang/rust/pull/37763
638 [37764]: https://github.com/rust-lang/rust/pull/37764
639 [37789]: https://github.com/rust-lang/rust/pull/37789
640 [37791]: https://github.com/rust-lang/rust/pull/37791
641 [37814]: https://github.com/rust-lang/rust/pull/37814
642 [37817]: https://github.com/rust-lang/rust/pull/37817
643 [37834]: https://github.com/rust-lang/rust/pull/37834
644 [37848]: https://github.com/rust-lang/rust/pull/37848
645 [37855]: https://github.com/rust-lang/rust/pull/37855
646 [37882]: https://github.com/rust-lang/rust/pull/37882
647 [37888]: https://github.com/rust-lang/rust/pull/37888
648 [37973]: https://github.com/rust-lang/rust/pull/37973
649 [37979]: https://github.com/rust-lang/rust/pull/37979
650 [38086]: https://github.com/rust-lang/rust/pull/38086
651 [38107]: https://github.com/rust-lang/rust/pull/38107
652 [38117]: https://github.com/rust-lang/rust/pull/38117
653 [38134]: https://github.com/rust-lang/rust/pull/38134
654 [38146]: https://github.com/rust-lang/rust/pull/38146
655 [38181]: https://github.com/rust-lang/rust/pull/38181
656 [38182]: https://github.com/rust-lang/rust/pull/38182
657 [38185]: https://github.com/rust-lang/rust/pull/38185
658 [38192]: https://github.com/rust-lang/rust/pull/38192
659 [38279]: https://github.com/rust-lang/rust/pull/38279
660 [38835]: https://github.com/rust-lang/rust/pull/38835
661 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
662 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
663 [RFC 1560]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md
664 [RFC 1681]: https://github.com/rust-lang/rfcs/blob/master/text/1681-macros-1.1.md
665 [RFC 1717]: https://github.com/rust-lang/rfcs/blob/master/text/1717-dllimport.md
666 [`hr_lifetime_in_assoc_type` lint]: https://github.com/rust-lang/rust/issues/33685
667 [`legacy_imports`]: https://github.com/rust-lang/rust/pull/38271
668 [cargo/3102]: https://github.com/rust-lang/cargo/pull/3102
669 [cargo/3221]: https://github.com/rust-lang/cargo/pull/3221
670 [cargo/3310]: https://github.com/rust-lang/cargo/pull/3310
671 [cargo/3311]: https://github.com/rust-lang/cargo/pull/3311
672 [cargo/3319]: https://github.com/rust-lang/cargo/pull/3319
673 [cargo/3336]: https://github.com/rust-lang/cargo/pull/3336
674 [cargo/3338]: https://github.com/rust-lang/cargo/pull/3338
675 [cargo/3348]: https://github.com/rust-lang/cargo/pull/3348
676 [cargo/3356]: https://github.com/rust-lang/cargo/pull/3356
677 [cargo/3361]: https://github.com/rust-lang/cargo/pull/3361
678 [cargo/3363]: https://github.com/rust-lang/cargo/pull/3363
679 [cargo/3368]: https://github.com/rust-lang/cargo/issues/3368
680 [cargo/3409]: https://github.com/rust-lang/cargo/pull/3409
681 [cargo/3410]: https://github.com/rust-lang/cargo/pull/3410
682 [`std::iter::Iterator::min_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.min_by
683 [`std::iter::Iterator::max_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.max_by
684 [`std::os::*::fs::FileExt`]: https://doc.rust-lang.org/std/os/unix/fs/trait.FileExt.html
685 [`std::sync::atomic::Atomic*::get_mut`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.get_mut
686 [`std::sync::atomic::Atomic*::into_inner`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.into_inner
687 [`std::vec::IntoIter::as_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_slice
688 [`std::vec::IntoIter::as_mut_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_mut_slice
689 [`std::sync::mpsc::Receiver::try_iter`]: https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.try_iter
690 [`std::os::unix::process::CommandExt::before_exec`]: https://doc.rust-lang.org/std/os/unix/process/trait.CommandExt.html#tymethod.before_exec
691 [`std::rc::Rc::strong_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.strong_count
692 [`std::rc::Rc::weak_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.weak_count
693 [`std::sync::Arc::strong_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.strong_count
694 [`std::sync::Arc::weak_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.weak_count
695 [`std::char::encode_utf8`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf8
696 [`std::char::encode_utf16`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf16
697 [`std::cell::Ref::clone`]: https://doc.rust-lang.org/std/cell/struct.Ref.html#method.clone
698 [`std::io::Take::into_inner`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.into_inner
701 Version 1.14.0 (2016-12-22)
702 ===========================
707 * [`..` matches multiple tuple fields in enum variants, structs
708 and tuples][36843]. [RFC 1492].
709 * [Safe `fn` items can be coerced to `unsafe fn` pointers][37389]
710 * [`use *` and `use ::*` both glob-import from the crate root][37367]
711 * [It's now possible to call a `Vec<Box<Fn()>>` without explicit
712 dereferencing][36822]
717 * [Mark enums with non-zero discriminant as non-zero][37224]
718 * [Lower-case `static mut` names are linted like other
719 statics and consts][37162]
720 * [Fix ICE on some macros in const integer positions
721 (e.g. `[u8; m!()]`)][36819]
722 * [Improve error message and snippet for "did you mean `x`"][36798]
723 * [Add a panic-strategy field to the target specification][36794]
724 * [Include LLVM version in `--version --verbose`][37200]
726 Compile-time Optimizations
727 --------------------------
729 * [Improve macro expansion performance][37569]
730 * [Shrink `Expr_::ExprInlineAsm`][37445]
731 * [Replace all uses of SHA-256 with BLAKE2b][37439]
732 * [Reduce the number of bytes hashed by `IchHasher`][37427]
733 * [Avoid more allocations when compiling html5ever][37373]
734 * [Use `SmallVector` in `CombineFields::instantiate`][37322]
735 * [Avoid some allocations in the macro parser][37318]
736 * [Use a faster deflate setting][37298]
737 * [Add `ArrayVec` and `AccumulateVec` to reduce heap allocations
738 during interning of slices][37270]
739 * [Optimize `write_metadata`][37267]
740 * [Don't process obligation forest cycles when stalled][37231]
741 * [Avoid many `CrateConfig` clones][37161]
742 * [Optimize `Substs::super_fold_with`][37108]
743 * [Optimize `ObligationForest`'s `NodeState` handling][36993]
744 * [Speed up `plug_leaks`][36917]
749 * [`println!()`, with no arguments, prints newline][36825].
750 Previously, an empty string was required to achieve the same.
751 * [`Wrapping` impls standard binary and unary operators, as well as
752 the `Sum` and `Product` iterators][37356]
753 * [Implement `From<Cow<str>> for String` and `From<Cow<[T]>> for
755 * [Improve `fold` performance for `chain`, `cloned`, `map`, and
756 `VecDeque` iterators][37315]
757 * [Improve `SipHasher` performance on small values][37312]
758 * [Add Iterator trait TrustedLen to enable better FromIterator /
760 * [Expand `.zip()` specialization to `.map()` and `.cloned()`][37230]
761 * [`ReadDir` implements `Debug`][37221]
762 * [Implement `RefUnwindSafe` for atomic types][37178]
763 * [Specialize `Vec::extend` to `Vec::extend_from_slice`][37094]
764 * [Avoid allocations in `Decoder::read_str`][37064]
765 * [`io::Error` implements `From<io::ErrorKind>`][37037]
766 * [Impl `Debug` for raw pointers to unsized data][36880]
767 * [Don't reuse `HashMap` random seeds][37470]
768 * [The internal memory layout of `HashMap` is more cache-friendly, for
769 significant improvements in some operations][36692]
770 * [`HashMap` uses less memory on 32-bit architectures][36595]
771 * [Impl `Add<{str, Cow<str>}>` for `Cow<str>`][36430]
776 * [Expose rustc cfg values to build scripts][cargo/3243]
777 * [Allow cargo to work with read-only `CARGO_HOME`][cargo/3259]
778 * [Fix passing --features when testing multiple packages][cargo/3280]
779 * [Use a single profile set per workspace][cargo/3249]
780 * [Load `replace` sections from lock files][cargo/3220]
781 * [Ignore `panic` configuration for test/bench profiles][cargo/3175]
786 * [rustup is the recommended Rust installation method][1.14rustup]
787 * This release includes host (rustc) builds for Linux on MIPS, PowerPC, and
788 S390x. These are [tier 2] platforms and may have major defects. Follow the
789 instructions on the website to install, or add the targets to an existing
790 installation with `rustup target add`. The new target triples are:
791 - `mips-unknown-linux-gnu`
792 - `mipsel-unknown-linux-gnu`
793 - `mips64-unknown-linux-gnuabi64`
794 - `mips64el-unknown-linux-gnuabi64 `
795 - `powerpc-unknown-linux-gnu`
796 - `powerpc64-unknown-linux-gnu`
797 - `powerpc64le-unknown-linux-gnu`
798 - `s390x-unknown-linux-gnu `
799 * This release includes target (std) builds for ARM Linux running MUSL
800 libc. These are [tier 2] platforms and may have major defects. Add the
801 following triples to an existing rustup installation with `rustup target add`:
802 - `arm-unknown-linux-musleabi`
803 - `arm-unknown-linux-musleabihf`
804 - `armv7-unknown-linux-musleabihf`
805 * This release includes [experimental support for WebAssembly][1.14wasm], via
806 the `wasm32-unknown-emscripten` target. This target is known to have major
807 defects. Please test, report, and fix.
808 * rustup no longer installs documentation by default. Run `rustup
809 component add rust-docs` to install.
810 * [Fix line stepping in debugger][37310]
811 * [Enable line number debuginfo in releases][37280]
816 * [Disable jemalloc on aarch64/powerpc/mips][37392]
817 * [Add support for Fuchsia OS][37313]
818 * [Detect local-rebuild by only MAJOR.MINOR version][37273]
823 * [A number of forward-compatibility lints used by the compiler
824 to gradually introduce language changes have been converted
825 to deny by default][36894]:
826 - ["use of inaccessible extern crate erroneously allowed"][36886]
827 - ["type parameter default erroneously allowed in invalid location"][36887]
828 - ["detects super or self keywords at the beginning of global path"][36888]
829 - ["two overlapping inherent impls define an item with the same name
830 were erroneously allowed"][36889]
831 - ["floating-point constants cannot be used in patterns"][36890]
832 - ["constants of struct or enum type can only be used in a pattern if
833 the struct or enum has `#[derive(PartialEq, Eq)]`"][36891]
834 - ["lifetimes or labels named `'_` were erroneously allowed"][36892]
835 * [Prohibit patterns in trait methods without bodies][37378]
836 * [The atomic `Ordering` enum may not be matched exhaustively][37351]
837 * [Future-proofing `#[no_link]` breaks some obscure cases][37247]
838 * [The `$crate` macro variable is accepted in fewer locations][37213]
839 * [Impls specifying extra region requirements beyond the trait
840 they implement are rejected][37167]
841 * [Enums may not be unsized][37111]. Unsized enums are intended to
842 work but never have. For now they are forbidden.
843 * [Enforce the shadowing restrictions from RFC 1560 for today's macros][36767]
845 [tier 2]: https://forge.rust-lang.org/platform-support.html
846 [1.14rustup]: https://internals.rust-lang.org/t/beta-testing-rustup-rs/3316/204
847 [1.14wasm]: https://users.rust-lang.org/t/compiling-to-the-web-with-rust-and-emscripten/7627
848 [36430]: https://github.com/rust-lang/rust/pull/36430
849 [36595]: https://github.com/rust-lang/rust/pull/36595
850 [36595]: https://github.com/rust-lang/rust/pull/36595
851 [36692]: https://github.com/rust-lang/rust/pull/36692
852 [36767]: https://github.com/rust-lang/rust/pull/36767
853 [36794]: https://github.com/rust-lang/rust/pull/36794
854 [36798]: https://github.com/rust-lang/rust/pull/36798
855 [36819]: https://github.com/rust-lang/rust/pull/36819
856 [36822]: https://github.com/rust-lang/rust/pull/36822
857 [36825]: https://github.com/rust-lang/rust/pull/36825
858 [36843]: https://github.com/rust-lang/rust/pull/36843
859 [36880]: https://github.com/rust-lang/rust/pull/36880
860 [36886]: https://github.com/rust-lang/rust/issues/36886
861 [36887]: https://github.com/rust-lang/rust/issues/36887
862 [36888]: https://github.com/rust-lang/rust/issues/36888
863 [36889]: https://github.com/rust-lang/rust/issues/36889
864 [36890]: https://github.com/rust-lang/rust/issues/36890
865 [36891]: https://github.com/rust-lang/rust/issues/36891
866 [36892]: https://github.com/rust-lang/rust/issues/36892
867 [36894]: https://github.com/rust-lang/rust/pull/36894
868 [36917]: https://github.com/rust-lang/rust/pull/36917
869 [36993]: https://github.com/rust-lang/rust/pull/36993
870 [37037]: https://github.com/rust-lang/rust/pull/37037
871 [37064]: https://github.com/rust-lang/rust/pull/37064
872 [37094]: https://github.com/rust-lang/rust/pull/37094
873 [37108]: https://github.com/rust-lang/rust/pull/37108
874 [37111]: https://github.com/rust-lang/rust/pull/37111
875 [37161]: https://github.com/rust-lang/rust/pull/37161
876 [37162]: https://github.com/rust-lang/rust/pull/37162
877 [37167]: https://github.com/rust-lang/rust/pull/37167
878 [37178]: https://github.com/rust-lang/rust/pull/37178
879 [37200]: https://github.com/rust-lang/rust/pull/37200
880 [37213]: https://github.com/rust-lang/rust/pull/37213
881 [37221]: https://github.com/rust-lang/rust/pull/37221
882 [37224]: https://github.com/rust-lang/rust/pull/37224
883 [37230]: https://github.com/rust-lang/rust/pull/37230
884 [37231]: https://github.com/rust-lang/rust/pull/37231
885 [37247]: https://github.com/rust-lang/rust/pull/37247
886 [37267]: https://github.com/rust-lang/rust/pull/37267
887 [37270]: https://github.com/rust-lang/rust/pull/37270
888 [37273]: https://github.com/rust-lang/rust/pull/37273
889 [37280]: https://github.com/rust-lang/rust/pull/37280
890 [37298]: https://github.com/rust-lang/rust/pull/37298
891 [37306]: https://github.com/rust-lang/rust/pull/37306
892 [37310]: https://github.com/rust-lang/rust/pull/37310
893 [37312]: https://github.com/rust-lang/rust/pull/37312
894 [37313]: https://github.com/rust-lang/rust/pull/37313
895 [37315]: https://github.com/rust-lang/rust/pull/37315
896 [37318]: https://github.com/rust-lang/rust/pull/37318
897 [37322]: https://github.com/rust-lang/rust/pull/37322
898 [37326]: https://github.com/rust-lang/rust/pull/37326
899 [37351]: https://github.com/rust-lang/rust/pull/37351
900 [37356]: https://github.com/rust-lang/rust/pull/37356
901 [37367]: https://github.com/rust-lang/rust/pull/37367
902 [37373]: https://github.com/rust-lang/rust/pull/37373
903 [37378]: https://github.com/rust-lang/rust/pull/37378
904 [37389]: https://github.com/rust-lang/rust/pull/37389
905 [37392]: https://github.com/rust-lang/rust/pull/37392
906 [37427]: https://github.com/rust-lang/rust/pull/37427
907 [37439]: https://github.com/rust-lang/rust/pull/37439
908 [37445]: https://github.com/rust-lang/rust/pull/37445
909 [37470]: https://github.com/rust-lang/rust/pull/37470
910 [37569]: https://github.com/rust-lang/rust/pull/37569
911 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
912 [cargo/3175]: https://github.com/rust-lang/cargo/pull/3175
913 [cargo/3220]: https://github.com/rust-lang/cargo/pull/3220
914 [cargo/3243]: https://github.com/rust-lang/cargo/pull/3243
915 [cargo/3249]: https://github.com/rust-lang/cargo/pull/3249
916 [cargo/3259]: https://github.com/rust-lang/cargo/pull/3259
917 [cargo/3280]: https://github.com/rust-lang/cargo/pull/3280
920 Version 1.13.0 (2016-11-10)
921 ===========================
926 * [Stabilize the `?` operator][36995]. `?` is a simple way to propagate
927 errors, like the `try!` macro, described in [RFC 0243].
928 * [Stabilize macros in type position][36014]. Described in [RFC 873].
929 * [Stabilize attributes on statements][36995]. Described in [RFC 0016].
930 * [Fix `#[derive]` for empty tuple structs/variants][35728]
931 * [Fix lifetime rules for 'if' conditions][36029]
932 * [Avoid loading and parsing unconfigured non-inline modules][36482]
937 * [Add the `-C link-arg` argument][36574]
938 * [Remove the old AST-based backend from rustc_trans][35764]
939 * [Don't enable NEON by default on armv7 Linux][35814]
940 * [Fix debug line number info for macro expansions][35238]
941 * [Do not emit "class method" debuginfo for types that are not
942 DICompositeType][36008]
943 * [Warn about multiple conflicting #[repr] hints][34623]
944 * [When sizing DST, don't double-count nested struct prefixes][36351]
945 * [Default RUST_MIN_STACK to 16MiB for now][36505]
946 * [Improve rlib metadata format][36551]. Reduces rlib size significantly.
947 * [Reject macros with empty repetitions to avoid infinite loop][36721]
948 * [Expand macros without recursing to avoid stack overflows][36214]
953 * [Replace macro backtraces with labeled local uses][35702]
954 * [Improve error message for missplaced doc comments][33922]
955 * [Buffer unix and lock windows to prevent message interleaving][35975]
956 * [Update lifetime errors to specifically note temporaries][36171]
957 * [Special case a few colors for Windows][36178]
958 * [Suggest `use self` when such an import resolves][36289]
959 * [Be more specific when type parameter shadows primitive type][36338]
960 * Many minor improvements
962 Compile-time Optimizations
963 --------------------------
965 * [Compute and cache HIR hashes at beginning][35854]
966 * [Don't hash types in loan paths][36004]
967 * [Cache projections in trans][35761]
968 * [Optimize the parser's last token handling][36527]
969 * [Only instantiate #[inline] functions in codegen units referencing
970 them][36524]. This leads to big improvements in cases where crates export
971 define many inline functions without using them directly.
972 * [Lazily allocate TypedArena's first chunk][36592]
973 * [Don't allocate during default HashSet creation][36734]
980 * [`overflowing_abs`]
981 * [`RefCell::try_borrow`]
982 * [`RefCell::try_borrow_mut`]
987 * [Add `assert_ne!` and `debug_assert_ne!`][35074]
988 * [Make `vec_deque::Drain`, `hash_map::Drain`, and `hash_set::Drain`
990 * [Implement `AsRef<[T]>` for `std::slice::Iter`][35559]
991 * [Implement `Debug` for `std::vec::IntoIter`][35707]
992 * [`CString`: avoid excessive growth just to 0-terminate][35871]
993 * [Implement `CoerceUnsized` for `{Cell, RefCell, UnsafeCell}`][35627]
994 * [Use arc4rand on FreeBSD][35884]
995 * [memrchr: Correct aligned offset computation][35969]
996 * [Improve Demangling of Rust Symbols][36059]
997 * [Use monotonic time in condition variables][35048]
998 * [Implement `Debug` for `std::path::{Components,Iter}`][36101]
999 * [Implement conversion traits for `char`][35755]
1000 * [Fix illegal instruction caused by overflow in channel cloning][36104]
1001 * [Zero first byte of CString on drop][36264]
1002 * [Inherit overflow checks for sum and product][36372]
1003 * [Add missing Eq implementations][36423]
1004 * [Implement `Debug` for `DirEntry`][36631]
1005 * [When `getaddrinfo` returns `EAI_SYSTEM` retrieve actual error from
1007 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
1008 * [Implement more traits for `std::io::ErrorKind`][35911]
1009 * [Optimize BinaryHeap bounds checking][36072]
1010 * [Work around pointer aliasing issue in `Vec::extend_from_slice`,
1011 `extend_with_element`][36355]
1012 * [Fix overflow checking in unsigned pow()][34942]
1017 * This release includes security fixes to both curl and OpenSSL.
1018 * [Fix transitive doctests when panic=abort][cargo/3021]
1019 * [Add --all-features flag to cargo][cargo/3038]
1020 * [Reject path-based dependencies in `cargo package`][cargo/3060]
1021 * [Don't parse the home directory more than once][cargo/3078]
1022 * [Don't try to generate Cargo.lock on empty workspaces][cargo/3092]
1023 * [Update OpenSSL to 1.0.2j][cargo/3121]
1024 * [Add license and license_file to cargo metadata output][cargo/3110]
1025 * [Make crates-io registry URL optional in config; ignore all changes to
1026 source.crates-io][cargo/3089]
1027 * [Don't download dependencies from other platforms][cargo/3123]
1028 * [Build transitive dev-dependencies when needed][cargo/3125]
1029 * [Add support for per-target rustflags in .cargo/config][cargo/3157]
1030 * [Avoid updating registry when adding existing deps][cargo/3144]
1031 * [Warn about path overrides that won't work][cargo/3136]
1032 * [Use workspaces during `cargo install`][cargo/3146]
1033 * [Leak mspdbsrv.exe processes on Windows][cargo/3162]
1034 * [Add --message-format flag][cargo/3000]
1035 * [Pass target environment for rustdoc][cargo/3205]
1036 * [Use `CommandExt::exec` for `cargo run` on Unix][cargo/2818]
1037 * [Update curl and curl-sys][cargo/3241]
1038 * [Call rustdoc test with the correct cfg flags of a package][cargo/3242]
1043 * [rustdoc: Add the `--sysroot` argument][36586]
1044 * [rustdoc: Fix a couple of issues with the search results][35655]
1045 * [rustdoc: remove the `!` from macro URLs and titles][35234]
1046 * [gdb: Fix pretty-printing special-cased Rust types][35585]
1047 * [rustdoc: Filter more incorrect methods inherited through Deref][36266]
1052 * [Remove unmaintained style guide][35124]
1053 * [Add s390x support][36369]
1054 * [Initial work at Haiku OS support][36727]
1055 * [Add mips-uclibc targets][35734]
1056 * [Crate-ify compiler-rt into compiler-builtins][35021]
1057 * [Add rustc version info (git hash + date) to dist tarball][36213]
1058 * Many documentation improvements
1063 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
1064 * [Deny (by default) transmuting from fn item types to pointer-sized
1065 types][34923]. Continuing the long transition to zero-sized fn items,
1067 * [Fix `#[derive]` for empty tuple structs/variants][35728].
1069 * [Issue deprecation warnings for safe accesses to extern statics][36173]
1070 * [Fix lifetime rules for 'if' conditions][36029].
1071 * [Inherit overflow checks for sum and product][36372].
1072 * [Forbid user-defined macros named "macro_rules"][36730].
1074 [33922]: https://github.com/rust-lang/rust/pull/33922
1075 [34623]: https://github.com/rust-lang/rust/pull/34623
1076 [34923]: https://github.com/rust-lang/rust/pull/34923
1077 [34942]: https://github.com/rust-lang/rust/pull/34942
1078 [34982]: https://github.com/rust-lang/rust/pull/34982
1079 [35021]: https://github.com/rust-lang/rust/pull/35021
1080 [35048]: https://github.com/rust-lang/rust/pull/35048
1081 [35074]: https://github.com/rust-lang/rust/pull/35074
1082 [35124]: https://github.com/rust-lang/rust/pull/35124
1083 [35234]: https://github.com/rust-lang/rust/pull/35234
1084 [35238]: https://github.com/rust-lang/rust/pull/35238
1085 [35354]: https://github.com/rust-lang/rust/pull/35354
1086 [35559]: https://github.com/rust-lang/rust/pull/35559
1087 [35585]: https://github.com/rust-lang/rust/pull/35585
1088 [35627]: https://github.com/rust-lang/rust/pull/35627
1089 [35655]: https://github.com/rust-lang/rust/pull/35655
1090 [35702]: https://github.com/rust-lang/rust/pull/35702
1091 [35707]: https://github.com/rust-lang/rust/pull/35707
1092 [35728]: https://github.com/rust-lang/rust/pull/35728
1093 [35734]: https://github.com/rust-lang/rust/pull/35734
1094 [35755]: https://github.com/rust-lang/rust/pull/35755
1095 [35761]: https://github.com/rust-lang/rust/pull/35761
1096 [35764]: https://github.com/rust-lang/rust/pull/35764
1097 [35814]: https://github.com/rust-lang/rust/pull/35814
1098 [35854]: https://github.com/rust-lang/rust/pull/35854
1099 [35871]: https://github.com/rust-lang/rust/pull/35871
1100 [35884]: https://github.com/rust-lang/rust/pull/35884
1101 [35911]: https://github.com/rust-lang/rust/pull/35911
1102 [35969]: https://github.com/rust-lang/rust/pull/35969
1103 [35975]: https://github.com/rust-lang/rust/pull/35975
1104 [36004]: https://github.com/rust-lang/rust/pull/36004
1105 [36008]: https://github.com/rust-lang/rust/pull/36008
1106 [36014]: https://github.com/rust-lang/rust/pull/36014
1107 [36029]: https://github.com/rust-lang/rust/pull/36029
1108 [36059]: https://github.com/rust-lang/rust/pull/36059
1109 [36072]: https://github.com/rust-lang/rust/pull/36072
1110 [36101]: https://github.com/rust-lang/rust/pull/36101
1111 [36104]: https://github.com/rust-lang/rust/pull/36104
1112 [36171]: https://github.com/rust-lang/rust/pull/36171
1113 [36173]: https://github.com/rust-lang/rust/pull/36173
1114 [36178]: https://github.com/rust-lang/rust/pull/36178
1115 [36213]: https://github.com/rust-lang/rust/pull/36213
1116 [36214]: https://github.com/rust-lang/rust/pull/36214
1117 [36264]: https://github.com/rust-lang/rust/pull/36264
1118 [36266]: https://github.com/rust-lang/rust/pull/36266
1119 [36289]: https://github.com/rust-lang/rust/pull/36289
1120 [36338]: https://github.com/rust-lang/rust/pull/36338
1121 [36351]: https://github.com/rust-lang/rust/pull/36351
1122 [36355]: https://github.com/rust-lang/rust/pull/36355
1123 [36369]: https://github.com/rust-lang/rust/pull/36369
1124 [36372]: https://github.com/rust-lang/rust/pull/36372
1125 [36423]: https://github.com/rust-lang/rust/pull/36423
1126 [36482]: https://github.com/rust-lang/rust/pull/36482
1127 [36505]: https://github.com/rust-lang/rust/pull/36505
1128 [36524]: https://github.com/rust-lang/rust/pull/36524
1129 [36527]: https://github.com/rust-lang/rust/pull/36527
1130 [36551]: https://github.com/rust-lang/rust/pull/36551
1131 [36574]: https://github.com/rust-lang/rust/pull/36574
1132 [36586]: https://github.com/rust-lang/rust/pull/36586
1133 [36592]: https://github.com/rust-lang/rust/pull/36592
1134 [36631]: https://github.com/rust-lang/rust/pull/36631
1135 [36639]: https://github.com/rust-lang/rust/pull/36639
1136 [36721]: https://github.com/rust-lang/rust/pull/36721
1137 [36727]: https://github.com/rust-lang/rust/pull/36727
1138 [36730]: https://github.com/rust-lang/rust/pull/36730
1139 [36734]: https://github.com/rust-lang/rust/pull/36734
1140 [36754]: https://github.com/rust-lang/rust/pull/36754
1141 [36995]: https://github.com/rust-lang/rust/pull/36995
1142 [RFC 0016]: https://github.com/rust-lang/rfcs/blob/master/text/0016-more-attributes.md
1143 [RFC 0243]: https://github.com/rust-lang/rfcs/blob/master/text/0243-trait-based-exception-handling.md
1144 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
1145 [RFC 401]: https://github.com/rust-lang/rfcs/blob/master/text/0401-coercions.md
1146 [RFC 873]: https://github.com/rust-lang/rfcs/blob/master/text/0873-type-macros.md
1147 [cargo/2818]: https://github.com/rust-lang/cargo/pull/2818
1148 [cargo/3000]: https://github.com/rust-lang/cargo/pull/3000
1149 [cargo/3021]: https://github.com/rust-lang/cargo/pull/3021
1150 [cargo/3038]: https://github.com/rust-lang/cargo/pull/3038
1151 [cargo/3060]: https://github.com/rust-lang/cargo/pull/3060
1152 [cargo/3078]: https://github.com/rust-lang/cargo/pull/3078
1153 [cargo/3089]: https://github.com/rust-lang/cargo/pull/3089
1154 [cargo/3092]: https://github.com/rust-lang/cargo/pull/3092
1155 [cargo/3110]: https://github.com/rust-lang/cargo/pull/3110
1156 [cargo/3121]: https://github.com/rust-lang/cargo/pull/3121
1157 [cargo/3123]: https://github.com/rust-lang/cargo/pull/3123
1158 [cargo/3125]: https://github.com/rust-lang/cargo/pull/3125
1159 [cargo/3136]: https://github.com/rust-lang/cargo/pull/3136
1160 [cargo/3144]: https://github.com/rust-lang/cargo/pull/3144
1161 [cargo/3146]: https://github.com/rust-lang/cargo/pull/3146
1162 [cargo/3157]: https://github.com/rust-lang/cargo/pull/3157
1163 [cargo/3162]: https://github.com/rust-lang/cargo/pull/3162
1164 [cargo/3205]: https://github.com/rust-lang/cargo/pull/3205
1165 [cargo/3241]: https://github.com/rust-lang/cargo/pull/3241
1166 [cargo/3242]: https://github.com/rust-lang/cargo/pull/3242
1167 [rustup]: https://www.rustup.rs
1168 [`checked_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.checked_abs
1169 [`wrapping_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.wrapping_abs
1170 [`overflowing_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.overflowing_abs
1171 [`RefCell::try_borrow`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow
1172 [`RefCell::try_borrow_mut`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow_mut
1173 [`SipHasher`]: https://doc.rust-lang.org/std/hash/struct.SipHasher.html
1174 [`DefaultHasher`]: https://doc.rust-lang.org/std/collections/hash_map/struct.DefaultHasher.html
1177 Version 1.12.1 (2016-10-20)
1178 ===========================
1183 * [ICE: 'rustc' panicked at 'assertion failed: concrete_substs.is_normalized_for_trans()' #36381][36381]
1184 * [Confusion with double negation and booleans][36856]
1185 * [rustc 1.12.0 fails with SIGSEGV in release mode (syn crate 0.8.0)][36875]
1186 * [Rustc 1.12.0 Windows build of `ethcore` crate fails with LLVM error][36924]
1187 * [1.12.0: High memory usage when linking in release mode with debug info][36926]
1188 * [Corrupted memory after updated to 1.12][36936]
1189 * ["Let NullaryConstructor = something;" causes internal compiler error: "tried to overwrite interned AdtDef"][37026]
1190 * [Fix ICE: inject bitcast if types mismatch for invokes/calls/stores][37112]
1191 * [debuginfo: Handle spread_arg case in MIR-trans in a more stable way.][37153]
1193 [36381]: https://github.com/rust-lang/rust/issues/36381
1194 [36856]: https://github.com/rust-lang/rust/issues/36856
1195 [36875]: https://github.com/rust-lang/rust/issues/36875
1196 [36924]: https://github.com/rust-lang/rust/issues/36924
1197 [36926]: https://github.com/rust-lang/rust/issues/36926
1198 [36936]: https://github.com/rust-lang/rust/issues/36936
1199 [37026]: https://github.com/rust-lang/rust/issues/37026
1200 [37112]: https://github.com/rust-lang/rust/issues/37112
1201 [37153]: https://github.com/rust-lang/rust/issues/37153
1204 Version 1.12.0 (2016-09-29)
1205 ===========================
1210 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)](https://github.com/rust-lang/rust/pull/34096).
1211 This translation pass is far simpler than the previous AST->LLVM pass, and
1212 creates opportunities to perform new optimizations directly on the MIR. It
1213 was previously described [on the Rust blog](https://blog.rust-lang.org/2016/04/19/MIR.html).
1214 * [`rustc` presents a new, more readable error format, along with
1215 machine-readable JSON error output for use by IDEs](https://github.com/rust-lang/rust/pull/35401).
1216 Most common editors supporting Rust have been updated to work with it. It was
1217 previously described [on the Rust blog](https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
1222 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)](https://github.com/rust-lang/rust/pull/34096).
1223 This translation pass is far simpler than the previous AST->LLVM pass, and
1224 creates opportunities to perform new optimizations directly on the MIR. It
1225 was previously described [on the Rust blog](https://blog.rust-lang.org/2016/04/19/MIR.html).
1226 * [Print the Rust target name, not the LLVM target name, with
1227 `--print target-list`](https://github.com/rust-lang/rust/pull/35489)
1228 * [The computation of `TypeId` is correct in some cases where it was previously
1229 producing inconsistent results](https://github.com/rust-lang/rust/pull/35267)
1230 * [The `mips-unknown-linux-gnu` target uses hardware floating point by default](https://github.com/rust-lang/rust/pull/34910)
1231 * [The `rustc` arguments, `--print target-cpus`, `--print target-features`,
1232 `--print relocation-models`, and `--print code-models` print the available
1233 options to the `-C target-cpu`, `-C target-feature`, `-C relocation-model` and
1234 `-C code-model` code generation arguments](https://github.com/rust-lang/rust/pull/34845)
1235 * [`rustc` supports three new MUSL targets on ARM: `arm-unknown-linux-musleabi`,
1236 `arm-unknown-linux-musleabihf`, and `armv7-unknown-linux-musleabihf`](https://github.com/rust-lang/rust/pull/35060).
1237 These targets produce statically-linked binaries. There are no binary release
1243 * [`rustc` presents a new, more readable error format, along with
1244 machine-readable JSON error output for use by IDEs](https://github.com/rust-lang/rust/pull/35401).
1245 Most common editors supporting Rust have been updated to work with it. It was
1246 previously described [on the Rust blog](https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
1247 * [In error descriptions, references are now described in plain English,
1248 instead of as "&-ptr"](https://github.com/rust-lang/rust/pull/35611)
1249 * [In error type descriptions, unknown numeric types are named `{integer}` or
1250 `{float}` instead of `_`](https://github.com/rust-lang/rust/pull/35080)
1251 * [`rustc` emits a clearer error when inner attributes follow a doc comment](https://github.com/rust-lang/rust/pull/34676)
1256 * [`macro_rules!` invocations can be made within `macro_rules!` invocations](https://github.com/rust-lang/rust/pull/34925)
1257 * [`macro_rules!` meta-variables are hygienic](https://github.com/rust-lang/rust/pull/35453)
1258 * [`macro_rules!` `tt` matchers can be reparsed correctly, making them much more
1259 useful](https://github.com/rust-lang/rust/pull/34908)
1260 * [`macro_rules!` `stmt` matchers correctly consume the entire contents when
1261 inside non-braces invocations](https://github.com/rust-lang/rust/pull/34886)
1262 * [Semicolons are properly required as statement delimeters inside
1263 `macro_rules!` invocations](https://github.com/rust-lang/rust/pull/34660)
1264 * [`cfg_attr` works on `path` attributes](https://github.com/rust-lang/rust/pull/34546)
1269 * [`Cell::as_ptr`](https://doc.rust-lang.org/std/cell/struct.Cell.html#method.as_ptr)
1270 * [`RefCell::as_ptr`](https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.as_ptr)
1271 * [`IpAddr::is_unspecified`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_unspecified)
1272 * [`IpAddr::is_loopback`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_loopback)
1273 * [`IpAddr::is_multicast`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_multicast)
1274 * [`Ipv4Addr::is_unspecified`](https://doc.rust-lang.org/std/net/struct.Ipv4Addr.html#method.is_unspecified)
1275 * [`Ipv6Addr::octets`](https://doc.rust-lang.org/std/net/struct.Ipv6Addr.html#method.octets)
1276 * [`LinkedList::contains`](https://doc.rust-lang.org/std/collections/linked_list/struct.LinkedList.html#method.contains)
1277 * [`VecDeque::contains`](https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.contains)
1278 * [`ExitStatusExt::from_raw`](https://doc.rust-lang.org/std/os/unix/process/trait.ExitStatusExt.html#tymethod.from_raw).
1279 Both on Unix and Windows.
1280 * [`Receiver::recv_timeout`](https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.recv_timeout)
1281 * [`RecvTimeoutError`](https://doc.rust-lang.org/std/sync/mpsc/enum.RecvTimeoutError.html)
1282 * [`BinaryHeap::peek_mut`](https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.peek_mut)
1283 * [`PeekMut`](https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html)
1284 * [`iter::Product`](https://doc.rust-lang.org/std/iter/trait.Product.html)
1285 * [`iter::Sum`](https://doc.rust-lang.org/std/iter/trait.Sum.html)
1286 * [`OccupiedEntry::remove_entry`](https://doc.rust-lang.org/std/collections/btree_map/struct.OccupiedEntry.html#method.remove_entry)
1287 * [`VacantEntry::into_key`](https://doc.rust-lang.org/std/collections/btree_map/struct.VacantEntry.html#method.into_key)
1292 * [The `format!` macro and friends now allow a single argument to be formatted
1293 in multiple styles](https://github.com/rust-lang/rust/pull/33642)
1294 * [The lifetime bounds on `[T]::binary_search_by` and
1295 `[T]::binary_search_by_key` have been adjusted to be more flexible](https://github.com/rust-lang/rust/pull/34762)
1296 * [`Option` implements `From` for its contained type](https://github.com/rust-lang/rust/pull/34828)
1297 * [`Cell`, `RefCell` and `UnsafeCell` implement `From` for their contained type](https://github.com/rust-lang/rust/pull/35392)
1298 * [`RwLock` panics if the reader count overflows](https://github.com/rust-lang/rust/pull/35378)
1299 * [`vec_deque::Drain`, `hash_map::Drain` and `hash_set::Drain` are covariant](https://github.com/rust-lang/rust/pull/35354)
1300 * [`vec::Drain` and `binary_heap::Drain` are covariant](https://github.com/rust-lang/rust/pull/34951)
1301 * [`Cow<str>` implements `FromIterator` for `char`, `&str` and `String`](https://github.com/rust-lang/rust/pull/35064)
1302 * [Sockets on Linux are correctly closed in subprocesses via `SOCK_CLOEXEC`](https://github.com/rust-lang/rust/pull/34946)
1303 * [`hash_map::Entry`, `hash_map::VacantEntry` and `hash_map::OccupiedEntry`
1304 implement `Debug`](https://github.com/rust-lang/rust/pull/34937)
1305 * [`btree_map::Entry`, `btree_map::VacantEntry` and `btree_map::OccupiedEntry`
1306 implement `Debug`](https://github.com/rust-lang/rust/pull/34885)
1307 * [`String` implements `AddAssign`](https://github.com/rust-lang/rust/pull/34890)
1308 * [Variadic `extern fn` pointers implement the `Clone`, `PartialEq`, `Eq`,
1309 `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and `fmt::Debug` traits](https://github.com/rust-lang/rust/pull/34879)
1310 * [`FileType` implements `Debug`](https://github.com/rust-lang/rust/pull/34757)
1311 * [References to `Mutex` and `RwLock` are unwind-safe](https://github.com/rust-lang/rust/pull/34756)
1312 * [`mpsc::sync_channel` `Receiver`s return any available message before
1313 reporting a disconnect](https://github.com/rust-lang/rust/pull/34731)
1314 * [Unicode definitions have been updated to 9.0](https://github.com/rust-lang/rust/pull/34599)
1315 * [`env` iterators implement `DoubleEndedIterator`](https://github.com/rust-lang/rust/pull/33312)
1320 * [Support local mirrors of registries](https://github.com/rust-lang/cargo/pull/2857)
1321 * [Add support for command aliases](https://github.com/rust-lang/cargo/pull/2679)
1322 * [Allow `opt-level="s"` / `opt-level="z"` in profile overrides](https://github.com/rust-lang/cargo/pull/3007)
1323 * [Make `cargo doc --open --target` work as expected](https://github.com/rust-lang/cargo/pull/2988)
1324 * [Speed up noop registry updates](https://github.com/rust-lang/cargo/pull/2974)
1325 * [Update OpenSSL](https://github.com/rust-lang/cargo/pull/2971)
1326 * [Fix `--panic=abort` with plugins](https://github.com/rust-lang/cargo/pull/2954)
1327 * [Always pass `-C metadata` to the compiler](https://github.com/rust-lang/cargo/pull/2946)
1328 * [Fix depending on git repos with workspaces](https://github.com/rust-lang/cargo/pull/2938)
1329 * [Add a `--lib` flag to `cargo new`](https://github.com/rust-lang/cargo/pull/2921)
1330 * [Add `http.cainfo` for custom certs](https://github.com/rust-lang/cargo/pull/2917)
1331 * [Indicate the compilation profile after compiling](https://github.com/rust-lang/cargo/pull/2909)
1332 * [Allow enabling features for dependencies with `--features`](https://github.com/rust-lang/cargo/pull/2876)
1333 * [Add `--jobs` flag to `cargo package`](https://github.com/rust-lang/cargo/pull/2867)
1334 * [Add `--dry-run` to `cargo publish`](https://github.com/rust-lang/cargo/pull/2849)
1335 * [Add support for `RUSTDOCFLAGS`](https://github.com/rust-lang/cargo/pull/2794)
1340 * [`panic::catch_unwind` is more optimized](https://github.com/rust-lang/rust/pull/35444)
1341 * [`panic::catch_unwind` no longer accesses thread-local storage on entry](https://github.com/rust-lang/rust/pull/34866)
1346 * [Test binaries now support a `--test-threads` argument to specify the number
1347 of threads used to run tests, and which acts the same as the
1348 `RUST_TEST_THREADS` environment variable](https://github.com/rust-lang/rust/pull/35414)
1349 * [The test runner now emits a warning when tests run over 60 seconds](https://github.com/rust-lang/rust/pull/35405)
1350 * [rustdoc: Fix methods in search results](https://github.com/rust-lang/rust/pull/34752)
1351 * [`rust-lldb` warns about unsupported versions of LLDB](https://github.com/rust-lang/rust/pull/34646)
1352 * [Rust releases now come with source packages that can be installed by rustup
1353 via `rustup component add rust-src`](https://github.com/rust-lang/rust/pull/34366).
1354 The resulting source code can be used by tools and IDES, located in the
1355 sysroot under `lib/rustlib/src`.
1360 * [The compiler can now be built against LLVM 3.9](https://github.com/rust-lang/rust/pull/35594)
1361 * Many minor improvements to the documentation.
1362 * [The Rust exception handling "personality" routine is now written in Rust](https://github.com/rust-lang/rust/pull/34832)
1367 * [When printing Windows `OsStr`s, unpaired surrogate codepoints are escaped
1368 with the lowercase format instead of the uppercase](https://github.com/rust-lang/rust/pull/35084)
1369 * [When formatting strings, if "precision" is specified, the "fill",
1370 "align" and "width" specifiers are no longer ignored](https://github.com/rust-lang/rust/pull/34544)
1371 * [The `Debug` impl for strings no longer escapes all non-ASCII characters](https://github.com/rust-lang/rust/pull/34485)
1374 Version 1.11.0 (2016-08-18)
1375 ===========================
1380 * [`cfg_attr` works on `path` attributes](https://github.com/rust-lang/rust/pull/34546)
1381 * [Support nested `cfg_attr` attributes](https://github.com/rust-lang/rust/pull/34216)
1382 * [Allow statement-generating braced macro invocations at the end of blocks](https://github.com/rust-lang/rust/pull/34436)
1383 * [Macros can be expanded inside of trait definitions](https://github.com/rust-lang/rust/pull/34213)
1384 * [`#[macro_use]` works properly when it is itself expanded from a macro](https://github.com/rust-lang/rust/pull/34032)
1389 * [`BinaryHeap::append`](https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.append)
1390 * [`BTreeMap::append`](https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.append)
1391 * [`BTreeMap::split_off`](https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.split_off)
1392 * [`BTreeSet::append`](https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.append)
1393 * [`BTreeSet::split_off`](https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.split_off)
1394 * [`f32::to_degrees`](https://doc.rust-lang.org/std/primitive.f32.html#method.to_degrees)
1395 (in libcore - previously stabilized in libstd)
1396 * [`f32::to_radians`](https://doc.rust-lang.org/std/primitive.f32.html#method.to_radians)
1397 (in libcore - previously stabilized in libstd)
1398 * [`f64::to_degrees`](https://doc.rust-lang.org/std/primitive.f64.html#method.to_degrees)
1399 (in libcore - previously stabilized in libstd)
1400 * [`f64::to_radians`](https://doc.rust-lang.org/std/primitive.f64.html#method.to_radians)
1401 (in libcore - previously stabilized in libstd)
1402 * [`Iterator::sum`](https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
1403 * [`Iterator::product`](https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
1404 * [`Cell::get_mut`](https://doc.rust-lang.org/std/cell/struct.Cell.html#method.get_mut)
1405 * [`RefCell::get_mut`](https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.get_mut)
1410 * [The `thread_local!` macro supports multiple definitions in a single
1411 invocation, and can apply attributes](https://github.com/rust-lang/rust/pull/34077)
1412 * [`Cow` implements `Default`](https://github.com/rust-lang/rust/pull/34305)
1413 * [`Wrapping` implements binary, octal, lower-hex and upper-hex
1414 `Display` formatting](https://github.com/rust-lang/rust/pull/34190)
1415 * [The range types implement `Hash`](https://github.com/rust-lang/rust/pull/34180)
1416 * [`lookup_host` ignores unknown address types](https://github.com/rust-lang/rust/pull/34067)
1417 * [`assert_eq!` accepts a custom error message, like `assert!` does](https://github.com/rust-lang/rust/pull/33976)
1418 * [The main thread is now called "main" instead of "<main>"](https://github.com/rust-lang/rust/pull/33803)
1423 * [Disallow specifying features of transitive deps](https://github.com/rust-lang/cargo/pull/2821)
1424 * [Add color support for Windows consoles](https://github.com/rust-lang/cargo/pull/2804)
1425 * [Fix `harness = false` on `[lib]` sections](https://github.com/rust-lang/cargo/pull/2795)
1426 * [Don't panic when `links` contains a '.'](https://github.com/rust-lang/cargo/pull/2787)
1427 * [Build scripts can emit warnings](https://github.com/rust-lang/cargo/pull/2630),
1428 and `-vv` prints warnings for all crates.
1429 * [Ignore file locks on OS X NFS mounts](https://github.com/rust-lang/cargo/pull/2720)
1430 * [Don't warn about `package.metadata` keys](https://github.com/rust-lang/cargo/pull/2668).
1431 This provides room for expansion by arbitrary tools.
1432 * [Add support for cdylib crate types](https://github.com/rust-lang/cargo/pull/2741)
1433 * [Prevent publishing crates when files are dirty](https://github.com/rust-lang/cargo/pull/2781)
1434 * [Don't fetch all crates on clean](https://github.com/rust-lang/cargo/pull/2704)
1435 * [Propagate --color option to rustc](https://github.com/rust-lang/cargo/pull/2779)
1436 * [Fix `cargo doc --open` on Windows](https://github.com/rust-lang/cargo/pull/2780)
1437 * [Improve autocompletion](https://github.com/rust-lang/cargo/pull/2772)
1438 * [Configure colors of stderr as well as stdout](https://github.com/rust-lang/cargo/pull/2739)
1443 * [Caching projections speeds up type check dramatically for some
1444 workloads](https://github.com/rust-lang/rust/pull/33816)
1445 * [The default `HashMap` hasher is SipHash 1-3 instead of SipHash 2-4](https://github.com/rust-lang/rust/pull/33940)
1446 This hasher is faster, but is believed to provide sufficient
1447 protection from collision attacks.
1448 * [Comparison of `Ipv4Addr` is 10x faster](https://github.com/rust-lang/rust/pull/33891)
1453 * [Fix empty implementation section on some module pages](https://github.com/rust-lang/rust/pull/34536)
1454 * [Fix inlined renamed reexports in import lists](https://github.com/rust-lang/rust/pull/34479)
1455 * [Fix search result layout for enum variants and struct fields](https://github.com/rust-lang/rust/pull/34477)
1456 * [Fix issues with source links to external crates](https://github.com/rust-lang/rust/pull/34387)
1457 * [Fix redirect pages for renamed reexports](https://github.com/rust-lang/rust/pull/34245)
1462 * [rustc is better at finding the MSVC toolchain](https://github.com/rust-lang/rust/pull/34492)
1463 * [When emitting debug info, rustc emits frame pointers for closures,
1464 shims and glue, as it does for all other functions](https://github.com/rust-lang/rust/pull/33909)
1465 * [rust-lldb warns about unsupported versions of LLDB](https://github.com/rust-lang/rust/pull/34646)
1466 * Many more errors have been given error codes and extended
1468 * API documentation continues to be improved, with many new examples
1473 * [rustc no longer hangs when dependencies recursively re-export
1474 submodules](https://github.com/rust-lang/rust/pull/34542)
1475 * [rustc requires LLVM 3.7+](https://github.com/rust-lang/rust/pull/34104)
1476 * [The 'How Safe and Unsafe Interact' chapter of The Rustonomicon was
1477 rewritten](https://github.com/rust-lang/rust/pull/33895)
1478 * [rustc support 16-bit pointer sizes](https://github.com/rust-lang/rust/pull/33460).
1479 No targets use this yet, but it works toward AVR support.
1484 * [`const`s and `static`s may not have unsized types](https://github.com/rust-lang/rust/pull/34443)
1485 * [The new follow-set rules that place restrictions on `macro_rules!`
1486 in order to ensure syntax forward-compatibility have been enabled](https://github.com/rust-lang/rust/pull/33982)
1487 This was an [ammendment to RFC 550](https://github.com/rust-lang/rfcs/pull/1384),
1488 and has been a warning since 1.10.
1489 * [`cfg` attribute process has been refactored to fix various bugs](https://github.com/rust-lang/rust/pull/33706).
1490 This causes breakage in some corner cases.
1493 Version 1.10.0 (2016-07-07)
1494 ===========================
1499 * [Allow `concat_idents!` in type positions as well as in expression
1500 positions](https://github.com/rust-lang/rust/pull/33735).
1501 * [`Copy` types are required to have a trivial implementation of `Clone`](https://github.com/rust-lang/rust/pull/33420).
1502 [RFC 1521](https://github.com/rust-lang/rfcs/blob/master/text/1521-copy-clone-semantics.md).
1503 * [Single-variant enums support the `#[repr(..)]` attribute](https://github.com/rust-lang/rust/pull/33355).
1504 * [Fix `#[derive(RustcEncodable)]` in the presence of other `encode` methods](https://github.com/rust-lang/rust/pull/32908).
1505 * [`panic!` can be converted to a runtime abort with the
1506 `-C panic=abort` flag](https://github.com/rust-lang/rust/pull/32900).
1507 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
1508 * [Add a new crate type, 'cdylib'](https://github.com/rust-lang/rust/pull/33553).
1509 cdylibs are dynamic libraries suitable for loading by non-Rust hosts.
1510 [RFC 1510](https://github.com/rust-lang/rfcs/blob/master/text/1510-rdylib.md).
1511 Note that Cargo does not yet directly support cdylibs.
1516 * `os::windows::fs::OpenOptionsExt::access_mode`
1517 * `os::windows::fs::OpenOptionsExt::share_mode`
1518 * `os::windows::fs::OpenOptionsExt::custom_flags`
1519 * `os::windows::fs::OpenOptionsExt::attributes`
1520 * `os::windows::fs::OpenOptionsExt::security_qos_flags`
1521 * `os::unix::fs::OpenOptionsExt::custom_flags`
1522 * [`sync::Weak::new`](http://doc.rust-lang.org/alloc/arc/struct.Weak.html#method.new)
1523 * `Default for sync::Weak`
1524 * [`panic::set_hook`](http://doc.rust-lang.org/std/panic/fn.set_hook.html)
1525 * [`panic::take_hook`](http://doc.rust-lang.org/std/panic/fn.take_hook.html)
1526 * [`panic::PanicInfo`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html)
1527 * [`panic::PanicInfo::payload`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.payload)
1528 * [`panic::PanicInfo::location`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.location)
1529 * [`panic::Location`](http://doc.rust-lang.org/std/panic/struct.Location.html)
1530 * [`panic::Location::file`](http://doc.rust-lang.org/std/panic/struct.Location.html#method.file)
1531 * [`panic::Location::line`](http://doc.rust-lang.org/std/panic/struct.Location.html#method.line)
1532 * [`ffi::CStr::from_bytes_with_nul`](http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul)
1533 * [`ffi::CStr::from_bytes_with_nul_unchecked`](http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul_unchecked)
1534 * [`ffi::FromBytesWithNulError`](http://doc.rust-lang.org/std/ffi/struct.FromBytesWithNulError.html)
1535 * [`fs::Metadata::modified`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.modified)
1536 * [`fs::Metadata::accessed`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.accessed)
1537 * [`fs::Metadata::created`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.created)
1538 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange`
1539 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange_weak`
1540 * `collections::{btree,hash}_map::{Occupied,Vacant,}Entry::key`
1541 * `os::unix::net::{UnixStream, UnixListener, UnixDatagram, SocketAddr}`
1542 * [`SocketAddr::is_unnamed`](http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.is_unnamed)
1543 * [`SocketAddr::as_pathname`](http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.as_pathname)
1544 * [`UnixStream::connect`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.connect)
1545 * [`UnixStream::pair`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.pair)
1546 * [`UnixStream::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.try_clone)
1547 * [`UnixStream::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.local_addr)
1548 * [`UnixStream::peer_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.peer_addr)
1549 * [`UnixStream::set_read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
1550 * [`UnixStream::set_write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
1551 * [`UnixStream::read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
1552 * [`UnixStream::write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
1553 * [`UnixStream::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.set_nonblocking)
1554 * [`UnixStream::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.take_error)
1555 * [`UnixStream::shutdown`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.shutdown)
1556 * Read/Write/RawFd impls for `UnixStream`
1557 * [`UnixListener::bind`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.bind)
1558 * [`UnixListener::accept`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.accept)
1559 * [`UnixListener::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.try_clone)
1560 * [`UnixListener::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.local_addr)
1561 * [`UnixListener::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.set_nonblocking)
1562 * [`UnixListener::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.take_error)
1563 * [`UnixListener::incoming`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.incoming)
1564 * RawFd impls for `UnixListener`
1565 * [`UnixDatagram::bind`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.bind)
1566 * [`UnixDatagram::unbound`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.unbound)
1567 * [`UnixDatagram::pair`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.pair)
1568 * [`UnixDatagram::connect`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.connect)
1569 * [`UnixDatagram::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.try_clone)
1570 * [`UnixDatagram::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.local_addr)
1571 * [`UnixDatagram::peer_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.peer_addr)
1572 * [`UnixDatagram::recv_from`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv_from)
1573 * [`UnixDatagram::recv`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv)
1574 * [`UnixDatagram::send_to`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send_to)
1575 * [`UnixDatagram::send`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send)
1576 * [`UnixDatagram::set_read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_read_timeout)
1577 * [`UnixDatagram::set_write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_write_timeout)
1578 * [`UnixDatagram::read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.read_timeout)
1579 * [`UnixDatagram::write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.write_timeout)
1580 * [`UnixDatagram::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_nonblocking)
1581 * [`UnixDatagram::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.take_error)
1582 * [`UnixDatagram::shutdown`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.shutdown)
1583 * RawFd impls for `UnixDatagram`
1584 * `{BTree,Hash}Map::values_mut`
1585 * [`<[_]>::binary_search_by_key`](http://doc.rust-lang.org/beta/std/primitive.slice.html#method.binary_search_by_key)
1590 * [The `abs_sub` method of floats is deprecated](https://github.com/rust-lang/rust/pull/33664).
1591 The semantics of this minor method are subtle and probably not what
1593 * [Add implementation of Ord for Cell<T> and RefCell<T> where T: Ord](https://github.com/rust-lang/rust/pull/33306).
1594 * [On Linux, if `HashMap`s can't be initialized with `getrandom` they
1595 will fall back to `/dev/urandom` temporarily to avoid blocking
1596 during early boot](https://github.com/rust-lang/rust/pull/33086).
1597 * [Implemented negation for wrapping numerals](https://github.com/rust-lang/rust/pull/33067).
1598 * [Implement `Clone` for `binary_heap::IntoIter`](https://github.com/rust-lang/rust/pull/33050).
1599 * [Implement `Display` and `Hash` for `std::num::Wrapping`](https://github.com/rust-lang/rust/pull/33023).
1600 * [Add `Default` implementation for `&CStr`, `CString`](https://github.com/rust-lang/rust/pull/32990).
1601 * [Implement `From<Vec<T>>` and `Into<Vec<T>>` for `VecDeque<T>`](https://github.com/rust-lang/rust/pull/32866).
1602 * [Implement `Default` for `UnsafeCell`, `fmt::Error`, `Condvar`,
1603 `Mutex`, `RwLock`](https://github.com/rust-lang/rust/pull/32785).
1607 * [Cargo.toml supports the `profile.*.panic` option](https://github.com/rust-lang/cargo/pull/2687).
1608 This controls the runtime behavior of the `panic!` macro
1609 and can be either "unwind" (the default), or "abort".
1610 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
1611 * [Don't throw away errors with `-p` arguments](https://github.com/rust-lang/cargo/pull/2723).
1612 * [Report status to stderr instead of stdout](https://github.com/rust-lang/cargo/pull/2693).
1613 * [Build scripts are passed a `CARGO_MANIFEST_LINKS` environment
1614 variable that corresponds to the `links` field of the manifest](https://github.com/rust-lang/cargo/pull/2710).
1615 * [Ban keywords from crate names](https://github.com/rust-lang/cargo/pull/2707).
1616 * [Canonicalize `CARGO_HOME` on Windows](https://github.com/rust-lang/cargo/pull/2604).
1617 * [Retry network requests](https://github.com/rust-lang/cargo/pull/2396).
1618 By default they are retried twice, which can be customized with the
1619 `net.retry` value in `.cargo/config`.
1620 * [Don't print extra error info for failing subcommands](https://github.com/rust-lang/cargo/pull/2674).
1621 * [Add `--force` flag to `cargo install`](https://github.com/rust-lang/cargo/pull/2405).
1622 * [Don't use `flock` on NFS mounts](https://github.com/rust-lang/cargo/pull/2623).
1623 * [Prefer building `cargo install` artifacts in temporary directories](https://github.com/rust-lang/cargo/pull/2610).
1624 Makes it possible to install multiple crates in parallel.
1625 * [Add `cargo test --doc`](https://github.com/rust-lang/cargo/pull/2578).
1626 * [Add `cargo --explain`](https://github.com/rust-lang/cargo/pull/2551).
1627 * [Don't print warnings when `-q` is passed](https://github.com/rust-lang/cargo/pull/2576).
1628 * [Add `cargo doc --lib` and `--bin`](https://github.com/rust-lang/cargo/pull/2577).
1629 * [Don't require build script output to be UTF-8](https://github.com/rust-lang/cargo/pull/2560).
1630 * [Correctly attempt multiple git usernames](https://github.com/rust-lang/cargo/pull/2584).
1635 * [rustc memory usage was reduced by refactoring the context used for
1636 type checking](https://github.com/rust-lang/rust/pull/33425).
1637 * [Speed up creation of `HashMap`s by caching the random keys used
1638 to initialize the hash state](https://github.com/rust-lang/rust/pull/33318).
1639 * [The `find` implementation for `Chain` iterators is 2x faster](https://github.com/rust-lang/rust/pull/33289).
1640 * [Trait selection optimizations speed up type checking by 15%](https://github.com/rust-lang/rust/pull/33138).
1641 * [Efficient trie lookup for boolean Unicode properties](https://github.com/rust-lang/rust/pull/33098).
1642 10x faster than the previous lookup tables.
1643 * [Special case `#[derive(Copy, Clone)]` to avoid bloat](https://github.com/rust-lang/rust/pull/31414).
1648 * Many incremental improvements to documentation and rustdoc.
1649 * [rustdoc: List blanket trait impls](https://github.com/rust-lang/rust/pull/33514).
1650 * [rustdoc: Clean up ABI rendering](https://github.com/rust-lang/rust/pull/33151).
1651 * [Indexing with the wrong type produces a more informative error](https://github.com/rust-lang/rust/pull/33401).
1652 * [Improve diagnostics for constants being used in irrefutable patterns](https://github.com/rust-lang/rust/pull/33406).
1653 * [When many method candidates are in scope limit the suggestions to 10](https://github.com/rust-lang/rust/pull/33338).
1654 * [Remove confusing suggestion when calling a `fn` type](https://github.com/rust-lang/rust/pull/33325).
1655 * [Do not suggest changing `&mut self` to `&mut mut self`](https://github.com/rust-lang/rust/pull/33319).
1660 * [Update i686-linux-android features to match Android ABI](https://github.com/rust-lang/rust/pull/33651).
1661 * [Update aarch64-linux-android features to match Android ABI](https://github.com/rust-lang/rust/pull/33500).
1662 * [`std` no longer prints backtraces on platforms where the running
1663 module must be loaded with `env::current_exe`, which can't be relied
1664 on](https://github.com/rust-lang/rust/pull/33554).
1665 * This release includes std binaries for the i586-unknown-linux-gnu,
1666 i686-unknown-linux-musl, and armv7-linux-androideabi targets. The
1667 i586 target is for old x86 hardware without SSE2, and the armv7
1668 target is for Android running on modern ARM architectures.
1669 * [The `rust-gdb` and `rust-lldb` scripts are distributed on all
1670 Unix platforms](https://github.com/rust-lang/rust/pull/32835).
1671 * [On Unix the runtime aborts by calling `libc::abort` instead of
1672 generating an illegal instruction](https://github.com/rust-lang/rust/pull/31457).
1673 * [Rust is now bootstrapped from the previous release of Rust,
1674 instead of a snapshot from an arbitrary commit](https://github.com/rust-lang/rust/pull/32942).
1679 * [`AtomicBool` is now bool-sized, not word-sized](https://github.com/rust-lang/rust/pull/33579).
1680 * [`target_env` for Linux ARM targets is just `gnu`, not
1681 `gnueabihf`, `gnueabi`, etc](https://github.com/rust-lang/rust/pull/33403).
1682 * [Consistently panic on overflow in `Duration::new`](https://github.com/rust-lang/rust/pull/33072).
1683 * [Change `String::truncate` to panic less](https://github.com/rust-lang/rust/pull/32977).
1684 * [Add `:block` to the follow set for `:ty` and `:path`](https://github.com/rust-lang/rust/pull/32945).
1685 Affects how macros are parsed.
1686 * [Fix macro hygiene bug](https://github.com/rust-lang/rust/pull/32923).
1687 * [Feature-gated attributes on macro-generated macro invocations are
1688 now rejected](https://github.com/rust-lang/rust/pull/32791).
1689 * [Suppress fallback and ambiguity errors during type inference](https://github.com/rust-lang/rust/pull/32258).
1690 This caused some minor changes to type inference.
1693 Version 1.9.0 (2016-05-26)
1694 ==========================
1699 * The `#[deprecated]` attribute when applied to an API will generate
1700 warnings when used. The warnings may be suppressed with
1701 `#[allow(deprecated)]`. [RFC 1270].
1702 * [`fn` item types are zero sized, and each `fn` names a unique
1703 type][1.9fn]. This will break code that transmutes `fn`s, so calling
1704 `transmute` on a `fn` type will generate a warning for a few cycles,
1705 then will be converted to an error.
1706 * [Field and method resolution understand visibility, so private
1707 fields and methods cannot prevent the proper use of public fields
1708 and methods][1.9fv].
1709 * [The parser considers unicode codepoints in the
1710 `PATTERN_WHITE_SPACE` category to be whitespace][1.9ws].
1716 * [`std::panic::catch_unwind`][] (renamed from `recover`)
1717 * [`std::panic::resume_unwind`][] (renamed from `propagate`)
1718 * [`std::panic::AssertUnwindSafe`][] (renamed from `AssertRecoverSafe`)
1719 * [`std::panic::UnwindSafe`][] (renamed from `RecoverSafe`)
1720 * [`str::is_char_boundary`]
1721 * [`<*const T>::as_ref`]
1722 * [`<*mut T>::as_ref`]
1723 * [`<*mut T>::as_mut`]
1724 * [`AsciiExt::make_ascii_uppercase`]
1725 * [`AsciiExt::make_ascii_lowercase`]
1726 * [`char::decode_utf16`]
1727 * [`char::DecodeUtf16`]
1728 * [`char::DecodeUtf16Error`]
1729 * [`char::DecodeUtf16Error::unpaired_surrogate`]
1730 * [`BTreeSet::take`]
1731 * [`BTreeSet::replace`]
1734 * [`HashSet::replace`]
1736 * [`OsString::with_capacity`]
1737 * [`OsString::clear`]
1738 * [`OsString::capacity`]
1739 * [`OsString::reserve`]
1740 * [`OsString::reserve_exact`]
1741 * [`OsStr::is_empty`]
1743 * [`std::os::unix::thread`]
1746 * [`JoinHandleExt::as_pthread_t`]
1747 * [`JoinHandleExt::into_pthread_t`]
1748 * [`HashSet::hasher`]
1749 * [`HashMap::hasher`]
1750 * [`CommandExt::exec`]
1751 * [`File::try_clone`]
1752 * [`SocketAddr::set_ip`]
1753 * [`SocketAddr::set_port`]
1754 * [`SocketAddrV4::set_ip`]
1755 * [`SocketAddrV4::set_port`]
1756 * [`SocketAddrV6::set_ip`]
1757 * [`SocketAddrV6::set_port`]
1758 * [`SocketAddrV6::set_flowinfo`]
1759 * [`SocketAddrV6::set_scope_id`]
1760 * [`slice::copy_from_slice`]
1761 * [`ptr::read_volatile`]
1762 * [`ptr::write_volatile`]
1763 * [`OpenOptions::create_new`]
1764 * [`TcpStream::set_nodelay`]
1765 * [`TcpStream::nodelay`]
1766 * [`TcpStream::set_ttl`]
1767 * [`TcpStream::ttl`]
1768 * [`TcpStream::set_only_v6`]
1769 * [`TcpStream::only_v6`]
1770 * [`TcpStream::take_error`]
1771 * [`TcpStream::set_nonblocking`]
1772 * [`TcpListener::set_ttl`]
1773 * [`TcpListener::ttl`]
1774 * [`TcpListener::set_only_v6`]
1775 * [`TcpListener::only_v6`]
1776 * [`TcpListener::take_error`]
1777 * [`TcpListener::set_nonblocking`]
1778 * [`UdpSocket::set_broadcast`]
1779 * [`UdpSocket::broadcast`]
1780 * [`UdpSocket::set_multicast_loop_v4`]
1781 * [`UdpSocket::multicast_loop_v4`]
1782 * [`UdpSocket::set_multicast_ttl_v4`]
1783 * [`UdpSocket::multicast_ttl_v4`]
1784 * [`UdpSocket::set_multicast_loop_v6`]
1785 * [`UdpSocket::multicast_loop_v6`]
1786 * [`UdpSocket::set_multicast_ttl_v6`]
1787 * [`UdpSocket::multicast_ttl_v6`]
1788 * [`UdpSocket::set_ttl`]
1789 * [`UdpSocket::ttl`]
1790 * [`UdpSocket::set_only_v6`]
1791 * [`UdpSocket::only_v6`]
1792 * [`UdpSocket::join_multicast_v4`]
1793 * [`UdpSocket::join_multicast_v6`]
1794 * [`UdpSocket::leave_multicast_v4`]
1795 * [`UdpSocket::leave_multicast_v6`]
1796 * [`UdpSocket::take_error`]
1797 * [`UdpSocket::connect`]
1798 * [`UdpSocket::send`]
1799 * [`UdpSocket::recv`]
1800 * [`UdpSocket::set_nonblocking`]
1805 * [`std::sync::Once` is poisoned if its initialization function
1807 * [`cell::Ref` and `cell::RefMut` can contain unsized types][1.9cu].
1808 * [Most types implement `fmt::Debug`][1.9db].
1809 * [The default buffer size used by `BufReader` and `BufWriter` was
1810 reduced to 8K, from 64K][1.9bf]. This is in line with the buffer size
1811 used by other languages.
1812 * [`Instant`, `SystemTime` and `Duration` implement `+=` and `-=`.
1813 `Duration` additionally implements `*=` and `/=`][1.9ta].
1814 * [`Skip` is a `DoubleEndedIterator`][1.9sk].
1815 * [`From<[u8; 4]>` is implemented for `Ipv4Addr`][1.9fi].
1816 * [`Chain` implements `BufRead`][1.9ch].
1817 * [`HashMap`, `HashSet` and iterators are covariant][1.9hc].
1822 * [Cargo can now run concurrently][1.9cc].
1823 * [Top-level overrides allow specific revisions of crates to be
1824 overridden through the entire crate graph][1.9ct]. This is intended
1825 to make upgrades easier for large projects, by allowing crates to be
1826 forked temporarily until they've been upgraded and republished.
1827 * [Cargo exports a `CARGO_PKG_AUTHORS` environment variable][1.9cp].
1828 * [Cargo will pass the contents of the `RUSTFLAGS` variable to `rustc`
1829 on the commandline][1.9cf]. `rustc` arguments can also be specified
1830 in the `build.rustflags` configuration key.
1835 * [The time complexity of comparing variables for equivalence during type
1836 unification is reduced from _O_(_n_!) to _O_(_n_)][1.9tu]. This leads
1837 to major compilation time improvement in some scenarios.
1838 * [`ToString` is specialized for `str`, giving it the same performance
1839 as `to_owned`][1.9ts].
1840 * [Spawning processes with `Command::output` no longer creates extra
1842 * [`#[derive(PartialEq)]` and `#[derive(PartialOrd)]` emit less code
1843 for C-like enums][1.9cl].
1848 * [Passing the `--quiet` flag to a test runner will produce
1849 much-abbreviated output][1.9q].
1850 * The Rust Project now publishes std binaries for the
1851 `mips-unknown-linux-musl`, `mipsel-unknown-linux-musl`, and
1852 `i586-pc-windows-msvc` targets.
1857 * [`std::sync::Once` is poisoned if its initialization function
1859 * [It is illegal to define methods with the same name in overlapping
1860 inherent `impl` blocks][1.9sn].
1861 * [`fn` item types are zero sized, and each `fn` names a unique
1862 type][1.9fn]. This will break code that transmutes `fn`s, so calling
1863 `transmute` on a `fn` type will generate a warning for a few cycles,
1864 then will be converted to an error.
1865 * [Improvements to const evaluation may trigger new errors when integer
1866 literals are out of range][1.9ce].
1869 [1.9bf]: https://github.com/rust-lang/rust/pull/32695
1870 [1.9cc]: https://github.com/rust-lang/cargo/pull/2486
1871 [1.9ce]: https://github.com/rust-lang/rust/pull/30587
1872 [1.9cf]: https://github.com/rust-lang/cargo/pull/2241
1873 [1.9ch]: https://github.com/rust-lang/rust/pull/32541
1874 [1.9cl]: https://github.com/rust-lang/rust/pull/31977
1875 [1.9cp]: https://github.com/rust-lang/cargo/pull/2465
1876 [1.9ct]: https://github.com/rust-lang/cargo/pull/2385
1877 [1.9cu]: https://github.com/rust-lang/rust/pull/32652
1878 [1.9db]: https://github.com/rust-lang/rust/pull/32054
1879 [1.9fi]: https://github.com/rust-lang/rust/pull/32050
1880 [1.9fn]: https://github.com/rust-lang/rust/pull/31710
1881 [1.9fv]: https://github.com/rust-lang/rust/pull/31938
1882 [1.9hc]: https://github.com/rust-lang/rust/pull/32635
1883 [1.9o]: https://github.com/rust-lang/rust/pull/32325
1884 [1.9q]: https://github.com/rust-lang/rust/pull/31887
1885 [1.9sk]: https://github.com/rust-lang/rust/pull/31700
1886 [1.9sn]: https://github.com/rust-lang/rust/pull/31925
1887 [1.9sp]: https://github.com/rust-lang/rust/pull/31618
1888 [1.9ta]: https://github.com/rust-lang/rust/pull/32448
1889 [1.9ts]: https://github.com/rust-lang/rust/pull/32586
1890 [1.9tu]: https://github.com/rust-lang/rust/pull/32062
1891 [1.9ws]: https://github.com/rust-lang/rust/pull/29734
1892 [RFC 1270]: https://github.com/rust-lang/rfcs/blob/master/text/1270-deprecation.md
1893 [`<*const T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
1894 [`<*mut T>::as_mut`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_mut
1895 [`<*mut T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
1896 [`slice::copy_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.copy_from_slice
1897 [`AsciiExt::make_ascii_lowercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_lowercase
1898 [`AsciiExt::make_ascii_uppercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_uppercase
1899 [`BTreeSet::get`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.get
1900 [`BTreeSet::replace`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.replace
1901 [`BTreeSet::take`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.take
1902 [`CommandExt::exec`]: http://doc.rust-lang.org/nightly/std/os/unix/process/trait.CommandExt.html#tymethod.exec
1903 [`File::try_clone`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html#method.try_clone
1904 [`HashMap::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.hasher
1905 [`HashSet::get`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.get
1906 [`HashSet::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.hasher
1907 [`HashSet::replace`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.replace
1908 [`HashSet::take`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.take
1909 [`JoinHandleExt::as_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.as_pthread_t
1910 [`JoinHandleExt::into_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.into_pthread_t
1911 [`JoinHandleExt`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html
1912 [`OpenOptions::create_new`]: http://doc.rust-lang.org/nightly/std/fs/struct.OpenOptions.html#method.create_new
1913 [`OsStr::is_empty`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.is_empty
1914 [`OsStr::len`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.len
1915 [`OsString::capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.capacity
1916 [`OsString::clear`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.clear
1917 [`OsString::reserve_exact`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve_exact
1918 [`OsString::reserve`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve
1919 [`OsString::with_capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.with_capacity
1920 [`RawPthread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/type.RawPthread.html
1921 [`SocketAddr::set_ip`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_ip
1922 [`SocketAddr::set_port`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_port
1923 [`SocketAddrV4::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_ip
1924 [`SocketAddrV4::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_port
1925 [`SocketAddrV6::set_flowinfo`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_flowinfo
1926 [`SocketAddrV6::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_ip
1927 [`SocketAddrV6::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_port
1928 [`SocketAddrV6::set_scope_id`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_scope_id
1929 [`TcpListener::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
1930 [`TcpListener::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
1931 [`TcpListener::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
1932 [`TcpListener::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
1933 [`TcpListener::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
1934 [`TcpListener::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
1935 [`TcpStream::nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.nodelay
1936 [`TcpStream::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
1937 [`TcpStream::set_nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nodelay
1938 [`TcpStream::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
1939 [`TcpStream::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
1940 [`TcpStream::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
1941 [`TcpStream::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
1942 [`TcpStream::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
1943 [`UdpSocket::broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.broadcast
1944 [`UdpSocket::connect`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.connect
1945 [`UdpSocket::join_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v4
1946 [`UdpSocket::join_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v6
1947 [`UdpSocket::leave_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v4
1948 [`UdpSocket::leave_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v6
1949 [`UdpSocket::multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v4
1950 [`UdpSocket::multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v6
1951 [`UdpSocket::multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v4
1952 [`UdpSocket::multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v6
1953 [`UdpSocket::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.only_v6
1954 [`UdpSocket::recv`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.recv
1955 [`UdpSocket::send`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.send
1956 [`UdpSocket::set_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_broadcast
1957 [`UdpSocket::set_multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v4
1958 [`UdpSocket::set_multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v6
1959 [`UdpSocket::set_multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v4
1960 [`UdpSocket::set_multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v6
1961 [`UdpSocket::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_nonblocking
1962 [`UdpSocket::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_only_v6
1963 [`UdpSocket::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_ttl
1964 [`UdpSocket::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.take_error
1965 [`UdpSocket::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.ttl
1966 [`char::DecodeUtf16Error::unpaired_surrogate`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html#method.unpaired_surrogate
1967 [`char::DecodeUtf16Error`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html
1968 [`char::DecodeUtf16`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16.html
1969 [`char::decode_utf16`]: http://doc.rust-lang.org/nightly/std/char/fn.decode_utf16.html
1970 [`ptr::read_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.read_volatile.html
1971 [`ptr::write_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.write_volatile.html
1972 [`std::os::unix::thread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/index.html
1973 [`std::panic::AssertUnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/struct.AssertUnwindSafe.html
1974 [`std::panic::UnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/trait.UnwindSafe.html
1975 [`std::panic::catch_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.catch_unwind.html
1976 [`std::panic::resume_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.resume_unwind.html
1977 [`std::panic`]: http://doc.rust-lang.org/nightly/std/panic/index.html
1978 [`str::is_char_boundary`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.is_char_boundary
1981 Version 1.8.0 (2016-04-14)
1982 ==========================
1987 * Rust supports overloading of compound assignment statements like
1988 `+=` by implementing the [`AddAssign`], [`SubAssign`],
1989 [`MulAssign`], [`DivAssign`], [`RemAssign`], [`BitAndAssign`],
1990 [`BitOrAssign`], [`BitXorAssign`], [`ShlAssign`], or [`ShrAssign`]
1992 * Empty structs can be defined with braces, as in `struct Foo { }`, in
1993 addition to the non-braced form, `struct Foo;`. [RFC 218].
1999 * [`str::encode_utf16`][] (renamed from `utf16_units`)
2000 * [`str::EncodeUtf16`][] (renamed from `Utf16Units`)
2003 * [`ptr::drop_in_place`]
2005 * [`time::SystemTime`]
2007 * [`Instant::duration_since`][] (renamed from `duration_from_earlier`)
2008 * [`Instant::elapsed`]
2009 * [`SystemTime::now`]
2010 * [`SystemTime::duration_since`][] (renamed from `duration_from_earlier`)
2011 * [`SystemTime::elapsed`]
2012 * Various `Add`/`Sub` impls for `Time` and `SystemTime`
2013 * [`SystemTimeError`]
2014 * [`SystemTimeError::duration`]
2015 * Various impls for `SystemTimeError`
2017 * [`AddAssign`], [`SubAssign`], [`MulAssign`], [`DivAssign`],
2018 [`RemAssign`], [`BitAndAssign`], [`BitOrAssign`],
2019 [`BitXorAssign`], [`ShlAssign`], [`ShrAssign`].
2020 * [The `write!` and `writeln!` macros correctly emit errors if any of
2021 their arguments can't be formatted][1.8w].
2022 * [Various I/O functions support large files on 32-bit Linux][1.8l].
2023 * [The Unix-specific `raw` modules, which contain a number of
2024 redefined C types are deprecated][1.8r], including `os::raw::unix`,
2025 `os::raw::macos`, and `os::raw::linux`. These modules defined types
2026 such as `ino_t` and `dev_t`. The inconsistency of these definitions
2027 across platforms was making it difficult to implement `std`
2028 correctly. Those that need these definitions should use the `libc`
2030 * The Unix-specific `MetadataExt` traits, including
2031 `os::unix::fs::MetadataExt`, which expose values such as inode
2032 numbers [no longer return platform-specific types][1.8r], but
2033 instead return widened integers. [RFC 1415].
2034 * [`btree_set::{IntoIter, Iter, Range}` are covariant][1.8cv].
2035 * [Atomic loads and stores are not volatile][1.8a].
2036 * [All types in `sync::mpsc` implement `fmt::Debug`][1.8mp].
2041 * [Inlining hash functions lead to a 3% compile-time improvement in
2042 some workloads][1.8h].
2043 * When using jemalloc, its symbols are [unprefixed so that it
2044 overrides the libc malloc implementation][1.8h]. This means that for
2045 rustc, LLVM is now using jemalloc, which results in a 6%
2046 compile-time improvement on a specific workload.
2047 * [Avoid quadratic growth in function size due to cleanups][1.8cu].
2052 * [32-bit MSVC builds finally implement unwinding][1.8ms].
2053 i686-pc-windows-msvc is now considered a tier-1 platform.
2054 * [The `--print targets` flag prints a list of supported targets][1.8t].
2055 * [The `--print cfg` flag prints the `cfg`s defined for the current
2057 * [`rustc` can be built with an new Cargo-based build system, written
2058 in Rust][1.8b]. It will eventually replace Rust's Makefile-based
2059 build system. To enable it configure with `configure --rustbuild`.
2060 * [Errors for non-exhaustive `match` patterns now list up to 3 missing
2061 variants while also indicating the total number of missing variants
2062 if more than 3][1.8m].
2063 * [Executable stacks are disabled on Linux and BSD][1.8nx].
2064 * The Rust Project now publishes binary releases of the standard
2065 library for a number of tier-2 targets:
2066 `armv7-unknown-linux-gnueabihf`, `powerpc-unknown-linux-gnu`,
2067 `powerpc64-unknown-linux-gnu`, `powerpc64le-unknown-linux-gnu`
2068 `x86_64-rumprun-netbsd`. These can be installed with
2069 tools such as [multirust][1.8mr].
2074 * [`cargo init` creates a new Cargo project in the current
2075 directory][1.8ci]. It is otherwise like `cargo new`.
2076 * [Cargo has configuration keys for `-v` and
2077 `--color`][1.8cc]. `verbose` and `color`, respectively, go in the
2078 `[term]` section of `.cargo/config`.
2079 * [Configuration keys that evaluate to strings or integers can be set
2080 via environment variables][1.8ce]. For example the `build.jobs` key
2081 can be set via `CARGO_BUILD_JOBS`. Environment variables take
2082 precedence over config files.
2083 * [Target-specific dependencies support Rust `cfg` syntax for
2084 describing targets][1.8cfg] so that dependencies for multiple
2085 targets can be specified together. [RFC 1361].
2086 * [The environment variables `CARGO_TARGET_ROOT`, `RUSTC`, and
2087 `RUSTDOC` take precedence over the `build.target-dir`,
2088 `build.rustc`, and `build.rustdoc` configuration values][1.8cv].
2089 * [The child process tree is killed on Windows when Cargo is
2091 * [The `build.target` configuration value sets the target platform,
2092 like `--target`][1.8ct].
2097 * [Unstable compiler flags have been further restricted][1.8u]. Since
2098 1.0 `-Z` flags have been considered unstable, and other flags that
2099 were considered unstable additionally required passing `-Z
2100 unstable-options` to access. Unlike unstable language and library
2101 features though, these options have been accessible on the stable
2102 release channel. Going forward, *new unstable flags will not be
2103 available on the stable release channel*, and old unstable flags
2104 will warn about their usage. In the future, all unstable flags will
2105 be unavailable on the stable release channel.
2106 * [It is no longer possible to `match` on empty enum variants using
2107 the `Variant(..)` syntax][1.8v]. This has been a warning since 1.6.
2108 * The Unix-specific `MetadataExt` traits, including
2109 `os::unix::fs::MetadataExt`, which expose values such as inode
2110 numbers [no longer return platform-specific types][1.8r], but
2111 instead return widened integers. [RFC 1415].
2112 * [Modules sourced from the filesystem cannot appear within arbitrary
2113 blocks, but only within other modules][1.8mf].
2114 * [`--cfg` compiler flags are parsed strictly as identifiers][1.8c].
2115 * On Unix, [stack overflow triggers a runtime abort instead of a
2117 * [`Command::spawn` and its equivalents return an error if any of
2118 its command-line arguments contain interior `NUL`s][1.8n].
2119 * [Tuple and unit enum variants from other crates are in the type
2121 * [On Windows `rustc` emits `.lib` files for the `staticlib` library
2122 type instead of `.a` files][1.8st]. Additionally, for the MSVC
2123 toolchain, `rustc` emits import libraries named `foo.dll.lib`
2124 instead of `foo.lib`.
2127 [1.8a]: https://github.com/rust-lang/rust/pull/30962
2128 [1.8b]: https://github.com/rust-lang/rust/pull/31123
2129 [1.8c]: https://github.com/rust-lang/rust/pull/31530
2130 [1.8cc]: https://github.com/rust-lang/cargo/pull/2397
2131 [1.8ce]: https://github.com/rust-lang/cargo/pull/2398
2132 [1.8cf]: https://github.com/rust-lang/rust/pull/31278
2133 [1.8cfg]: https://github.com/rust-lang/cargo/pull/2328
2134 [1.8ci]: https://github.com/rust-lang/cargo/pull/2081
2135 [1.8ck]: https://github.com/rust-lang/cargo/pull/2370
2136 [1.8ct]: https://github.com/rust-lang/cargo/pull/2335
2137 [1.8cu]: https://github.com/rust-lang/rust/pull/31390
2138 [1.8cv]: https://github.com/rust-lang/cargo/issues/2365
2139 [1.8cv]: https://github.com/rust-lang/rust/pull/30998
2140 [1.8h]: https://github.com/rust-lang/rust/pull/31460
2141 [1.8l]: https://github.com/rust-lang/rust/pull/31668
2142 [1.8m]: https://github.com/rust-lang/rust/pull/31020
2143 [1.8mf]: https://github.com/rust-lang/rust/pull/31534
2144 [1.8mp]: https://github.com/rust-lang/rust/pull/30894
2145 [1.8mr]: https://users.rust-lang.org/t/multirust-0-8-with-cross-std-installation/4901
2146 [1.8ms]: https://github.com/rust-lang/rust/pull/30448
2147 [1.8n]: https://github.com/rust-lang/rust/pull/31056
2148 [1.8nx]: https://github.com/rust-lang/rust/pull/30859
2149 [1.8r]: https://github.com/rust-lang/rust/pull/31551
2150 [1.8so]: https://github.com/rust-lang/rust/pull/31333
2151 [1.8st]: https://github.com/rust-lang/rust/pull/29520
2152 [1.8t]: https://github.com/rust-lang/rust/pull/31358
2153 [1.8tn]: https://github.com/rust-lang/rust/pull/30882
2154 [1.8u]: https://github.com/rust-lang/rust/pull/31793
2155 [1.8v]: https://github.com/rust-lang/rust/pull/31757
2156 [1.8w]: https://github.com/rust-lang/rust/pull/31904
2157 [RFC 1361]: https://github.com/rust-lang/rfcs/blob/master/text/1361-cargo-cfg-dependencies.md
2158 [RFC 1415]: https://github.com/rust-lang/rfcs/blob/master/text/1415-trim-std-os.md
2159 [RFC 218]: https://github.com/rust-lang/rfcs/blob/master/text/0218-empty-struct-with-braces.md
2160 [RFC 953]: https://github.com/rust-lang/rfcs/blob/master/text/0953-op-assign.md
2161 [`AddAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.AddAssign.html
2162 [`BitAndAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitAndAssign.html
2163 [`BitOrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitOrAssign.html
2164 [`BitXorAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitXorAssign.html
2165 [`DivAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.DivAssign.html
2166 [`Instant::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.duration_since
2167 [`Instant::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.elapsed
2168 [`Instant::now`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.now
2169 [`MulAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.MulAssign.html
2170 [`Ref::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.Ref.html#method.map
2171 [`RefMut::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.RefMut.html#method.map
2172 [`RemAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.RemAssign.html
2173 [`ShlAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShlAssign.html
2174 [`ShrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShrAssign.html
2175 [`SubAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.SubAssign.html
2176 [`SystemTime::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.duration_since
2177 [`SystemTime::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.elapsed
2178 [`SystemTime::now`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.now
2179 [`SystemTimeError::duration`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html#method.duration
2180 [`SystemTimeError`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html
2181 [`UNIX_EPOCH`]: http://doc.rust-lang.org/nightly/std/time/constant.UNIX_EPOCH.html
2182 [`ptr::drop_in_place`]: http://doc.rust-lang.org/nightly/std/ptr/fn.drop_in_place.html
2183 [`str::EncodeUtf16`]: http://doc.rust-lang.org/nightly/std/str/struct.EncodeUtf16.html
2184 [`str::encode_utf16`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.encode_utf16
2185 [`time::Instant`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html
2186 [`time::SystemTime`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html
2189 Version 1.7.0 (2016-03-03)
2190 ==========================
2197 * [`Path::strip_prefix`][] (renamed from relative_from)
2198 * [`path::StripPrefixError`][] (new error type returned from strip_prefix)
2200 * [`Ipv4Addr::is_loopback`]
2201 * [`Ipv4Addr::is_private`]
2202 * [`Ipv4Addr::is_link_local`]
2203 * [`Ipv4Addr::is_multicast`]
2204 * [`Ipv4Addr::is_broadcast`]
2205 * [`Ipv4Addr::is_documentation`]
2207 * [`Ipv6Addr::is_unspecified`]
2208 * [`Ipv6Addr::is_loopback`]
2209 * [`Ipv6Addr::is_multicast`]
2212 * [`Vec::as_mut_slice`]
2214 * [`String::as_str`]
2215 * [`String::as_mut_str`]
2217 * `<[T]>::`[`clone_from_slice`], which now requires the two slices to
2219 * `<[T]>::`[`sort_by_key`]
2220 * checked, saturated, and overflowing operations
2221 * [`i32::checked_rem`], [`i32::checked_neg`], [`i32::checked_shl`], [`i32::checked_shr`]
2222 * [`i32::saturating_mul`]
2223 * [`i32::overflowing_add`], [`i32::overflowing_sub`], [`i32::overflowing_mul`], [`i32::overflowing_div`]
2224 * [`i32::overflowing_rem`], [`i32::overflowing_neg`], [`i32::overflowing_shl`], [`i32::overflowing_shr`]
2225 * [`u32::checked_rem`], [`u32::checked_neg`], [`u32::checked_shl`], [`u32::checked_shl`]
2226 * [`u32::saturating_mul`]
2227 * [`u32::overflowing_add`], [`u32::overflowing_sub`], [`u32::overflowing_mul`], [`u32::overflowing_div`]
2228 * [`u32::overflowing_rem`], [`u32::overflowing_neg`], [`u32::overflowing_shl`], [`u32::overflowing_shr`]
2229 * and checked, saturated, and overflowing operations for other primitive types
2231 * [`ffi::IntoStringError`]
2232 * [`CString::into_string`]
2233 * [`CString::into_bytes`]
2234 * [`CString::into_bytes_with_nul`]
2235 * `From<CString> for Vec<u8>`
2237 * [`IntoStringError::into_cstring`]
2238 * [`IntoStringError::utf8_error`]
2239 * `Error for IntoStringError`
2241 * [`std::hash::BuildHasher`]
2242 * [`BuildHasher::Hasher`]
2243 * [`BuildHasher::build_hasher`]
2244 * [`std::hash::BuildHasherDefault`]
2245 * [`HashMap::with_hasher`]
2246 * [`HashMap::with_capacity_and_hasher`]
2247 * [`HashSet::with_hasher`]
2248 * [`HashSet::with_capacity_and_hasher`]
2249 * [`std::collections::hash_map::RandomState`]
2250 * [`RandomState::new`]
2251 * [Validating UTF-8 is faster by a factor of between 7 and 14x for
2252 ASCII input][1.7utf8]. This means that creating `String`s and `str`s
2253 from bytes is faster.
2254 * [The performance of `LineWriter` (and thus `io::stdout`) was
2255 improved by using `memchr` to search for newlines][1.7m].
2256 * [`f32::to_degrees` and `f32::to_radians` are stable][1.7f]. The
2257 `f64` variants were stabilized previously.
2258 * [`BTreeMap` was rewritten to use less memory and improve the performance
2259 of insertion and iteration, the latter by as much as 5x][1.7bm].
2260 * [`BTreeSet` and its iterators, `Iter`, `IntoIter`, and `Range` are
2261 covariant over their contained type][1.7bt].
2262 * [`LinkedList` and its iterators, `Iter` and `IntoIter` are covariant
2263 over their contained type][1.7ll].
2264 * [`str::replace` now accepts a `Pattern`][1.7rp], like other string
2266 * [`Any` is implemented for unsized types][1.7a].
2267 * [`Hash` is implemented for `Duration`][1.7h].
2272 * [When running tests with `--test`, rustdoc will pass `--cfg`
2273 arguments to the compiler][1.7dt].
2274 * [The compiler is built with RPATH information by default][1.7rpa].
2275 This means that it will be possible to run `rustc` when installed in
2276 unusual configurations without configuring the dynamic linker search
2278 * [`rustc` passes `--enable-new-dtags` to GNU ld][1.7dta]. This makes
2279 any RPATH entries (emitted with `-C rpath`) *not* take precedence
2280 over `LD_LIBRARY_PATH`.
2285 * [`cargo rustc` accepts a `--profile` flag that runs `rustc` under
2286 any of the compilation profiles, 'dev', 'bench', or 'test'][1.7cp].
2287 * [The `rerun-if-changed` build script directive no longer causes the
2288 build script to incorrectly run twice in certain scenarios][1.7rr].
2293 * Soundness fixes to the interactions between associated types and
2294 lifetimes, specified in [RFC 1214], [now generate errors][1.7sf] for
2295 code that violates the new rules. This is a significant change that
2296 is known to break existing code, so it has emitted warnings for the
2297 new error cases since 1.4 to give crate authors time to adapt. The
2298 details of what is changing are subtle; read the RFC for more.
2299 * [Several bugs in the compiler's visibility calculations were
2300 fixed][1.7v]. Since this was found to break significant amounts of
2301 code, the new errors will be emitted as warnings for several release
2302 cycles, under the `private_in_public` lint.
2303 * Defaulted type parameters were accidentally accepted in positions
2304 that were not intended. In this release, [defaulted type parameters
2305 appearing outside of type definitions will generate a
2306 warning][1.7d], which will become an error in future releases.
2307 * [Parsing "." as a float results in an error instead of 0][1.7p].
2308 That is, `".".parse::<f32>()` returns `Err`, not `Ok(0.0)`.
2309 * [Borrows of closure parameters may not outlive the closure][1.7bc].
2311 [1.7a]: https://github.com/rust-lang/rust/pull/30928
2312 [1.7bc]: https://github.com/rust-lang/rust/pull/30341
2313 [1.7bm]: https://github.com/rust-lang/rust/pull/30426
2314 [1.7bt]: https://github.com/rust-lang/rust/pull/30998
2315 [1.7cp]: https://github.com/rust-lang/cargo/pull/2224
2316 [1.7d]: https://github.com/rust-lang/rust/pull/30724
2317 [1.7dt]: https://github.com/rust-lang/rust/pull/30372
2318 [1.7dta]: https://github.com/rust-lang/rust/pull/30394
2319 [1.7f]: https://github.com/rust-lang/rust/pull/30672
2320 [1.7h]: https://github.com/rust-lang/rust/pull/30818
2321 [1.7ll]: https://github.com/rust-lang/rust/pull/30663
2322 [1.7m]: https://github.com/rust-lang/rust/pull/30381
2323 [1.7p]: https://github.com/rust-lang/rust/pull/30681
2324 [1.7rp]: https://github.com/rust-lang/rust/pull/29498
2325 [1.7rpa]: https://github.com/rust-lang/rust/pull/30353
2326 [1.7rr]: https://github.com/rust-lang/cargo/pull/2279
2327 [1.7sf]: https://github.com/rust-lang/rust/pull/30389
2328 [1.7utf8]: https://github.com/rust-lang/rust/pull/30740
2329 [1.7v]: https://github.com/rust-lang/rust/pull/29973
2330 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
2331 [`BuildHasher::Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
2332 [`BuildHasher::build_hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html#tymethod.build_hasher
2333 [`CString::into_bytes_with_nul`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes_with_nul
2334 [`CString::into_bytes`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes
2335 [`CString::into_string`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_string
2336 [`HashMap::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_capacity_and_hasher
2337 [`HashMap::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_hasher
2338 [`HashSet::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_capacity_and_hasher
2339 [`HashSet::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_hasher
2340 [`IntoStringError::into_cstring`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.into_cstring
2341 [`IntoStringError::utf8_error`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.utf8_error
2342 [`Ipv4Addr::is_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_broadcast
2343 [`Ipv4Addr::is_documentation`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_documentation
2344 [`Ipv4Addr::is_link_local`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_link_local
2345 [`Ipv4Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_loopback
2346 [`Ipv4Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_multicast
2347 [`Ipv4Addr::is_private`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_private
2348 [`Ipv6Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_loopback
2349 [`Ipv6Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_multicast
2350 [`Ipv6Addr::is_unspecified`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_unspecified
2351 [`Path::strip_prefix`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.strip_prefix
2352 [`RandomState::new`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html#method.new
2353 [`String::as_mut_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_mut_str
2354 [`String::as_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_str
2355 [`Vec::as_mut_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_mut_slice
2356 [`Vec::as_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_slice
2357 [`clone_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.clone_from_slice
2358 [`ffi::IntoStringError`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html
2359 [`i32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_neg
2360 [`i32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_rem
2361 [`i32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shl
2362 [`i32::checked_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shr
2363 [`i32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_add
2364 [`i32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_div
2365 [`i32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_mul
2366 [`i32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_neg
2367 [`i32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_rem
2368 [`i32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shl
2369 [`i32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shr
2370 [`i32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_sub
2371 [`i32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.saturating_mul
2372 [`path::StripPrefixError`]: http://doc.rust-lang.org/nightly/std/path/struct.StripPrefixError.html
2373 [`sort_by_key`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.sort_by_key
2374 [`std::collections::hash_map::RandomState`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html
2375 [`std::hash::BuildHasherDefault`]: http://doc.rust-lang.org/nightly/std/hash/struct.BuildHasherDefault.html
2376 [`std::hash::BuildHasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html
2377 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
2378 [`u32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_rem
2379 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
2380 [`u32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_shl
2381 [`u32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_add
2382 [`u32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_div
2383 [`u32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_mul
2384 [`u32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_neg
2385 [`u32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_rem
2386 [`u32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shl
2387 [`u32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shr
2388 [`u32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_sub
2389 [`u32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.saturating_mul
2392 Version 1.6.0 (2016-01-21)
2393 ==========================
2398 * The `#![no_std]` attribute causes a crate to not be linked to the
2399 standard library, but only the [core library][1.6co], as described
2400 in [RFC 1184]. The core library defines common types and traits but
2401 has no platform dependencies whatsoever, and is the basis for Rust
2402 software in environments that cannot support a full port of the
2403 standard library, such as operating systems. Most of the core
2404 library is now stable.
2410 [`Read::read_exact`],
2411 [`ErrorKind::UnexpectedEof`][] (renamed from `UnexpectedEOF`),
2412 [`fs::DirBuilder`], [`fs::DirBuilder::new`],
2413 [`fs::DirBuilder::recursive`], [`fs::DirBuilder::create`],
2414 [`os::unix::fs::DirBuilderExt`],
2415 [`os::unix::fs::DirBuilderExt::mode`], [`vec::Drain`],
2416 [`vec::Vec::drain`], [`string::Drain`], [`string::String::drain`],
2417 [`vec_deque::Drain`], [`vec_deque::VecDeque::drain`],
2418 [`collections::hash_map::Drain`],
2419 [`collections::hash_map::HashMap::drain`],
2420 [`collections::hash_set::Drain`],
2421 [`collections::hash_set::HashSet::drain`],
2422 [`collections::binary_heap::Drain`],
2423 [`collections::binary_heap::BinaryHeap::drain`],
2424 [`Vec::extend_from_slice`][] (renamed from `push_all`),
2425 [`Mutex::get_mut`], [`Mutex::into_inner`], [`RwLock::get_mut`],
2426 [`RwLock::into_inner`],
2427 [`Iterator::min_by_key`][] (renamed from `min_by`),
2428 [`Iterator::max_by_key`][] (renamed from `max_by`).
2429 * The [core library][1.6co] is stable, as are most of its APIs.
2430 * [The `assert_eq!` macro supports arguments that don't implement
2431 `Sized`][1.6ae], such as arrays. In this way it behaves more like
2433 * Several timer functions that take duration in milliseconds [are
2434 deprecated in favor of those that take `Duration`][1.6ms]. These
2435 include `Condvar::wait_timeout_ms`, `thread::sleep_ms`, and
2436 `thread::park_timeout_ms`.
2437 * The algorithm by which `Vec` reserves additional elements was
2438 [tweaked to not allocate excessive space][1.6a] while still growing
2440 * `From` conversions are [implemented from integers to floats][1.6f]
2441 in cases where the conversion is lossless. Thus they are not
2442 implemented for 32-bit ints to `f32`, nor for 64-bit ints to `f32`
2443 or `f64`. They are also not implemented for `isize` and `usize`
2444 because the implementations would be platform-specific. `From` is
2445 also implemented from `f32` to `f64`.
2446 * `From<&Path>` and `From<PathBuf>` are implemented for `Cow<Path>`.
2447 * `From<T>` is implemented for `Box<T>`, `Rc<T>` and `Arc<T>`.
2448 * `IntoIterator` is implemented for `&PathBuf` and `&Path`.
2449 * [`BinaryHeap` was refactored][1.6bh] for modest performance
2451 * Sorting slices that are already sorted [is 50% faster in some
2457 * Cargo will look in `$CARGO_HOME/bin` for subcommands [by default][1.6c].
2458 * Cargo build scripts can specify their dependencies by emitting the
2459 [`rerun-if-changed`][1.6rr] key.
2460 * crates.io will reject publication of crates with dependencies that
2461 have a wildcard version constraint. Crates with wildcard
2462 dependencies were seen to cause a variety of problems, as described
2463 in [RFC 1241]. Since 1.5 publication of such crates has emitted a
2465 * `cargo clean` [accepts a `--release` flag][1.6cc] to clean the
2466 release folder. A variety of artifacts that Cargo failed to clean
2467 are now correctly deleted.
2472 * The `unreachable_code` lint [warns when a function call's argument
2474 * The parser indicates [failures that may be caused by
2475 confusingly-similar Unicode characters][1.6uc]
2476 * Certain macro errors [are reported at definition time][1.6m], not
2482 * The compiler no longer makes use of the [`RUST_PATH`][1.6rp]
2483 environment variable when locating crates. This was a pre-cargo
2484 feature for integrating with the package manager that was
2485 accidentally never removed.
2486 * [A number of bugs were fixed in the privacy checker][1.6p] that
2487 could cause previously-accepted code to break.
2488 * [Modules and unit/tuple structs may not share the same name][1.6ts].
2489 * [Bugs in pattern matching unit structs were fixed][1.6us]. The tuple
2490 struct pattern syntax (`Foo(..)`) can no longer be used to match
2491 unit structs. This is a warning now, but will become an error in
2492 future releases. Patterns that share the same name as a const are
2494 * A bug was fixed that causes [rustc not to apply default type
2495 parameters][1.6xc] when resolving certain method implementations of
2496 traits defined in other crates.
2498 [1.6a]: https://github.com/rust-lang/rust/pull/29454
2499 [1.6ae]: https://github.com/rust-lang/rust/pull/29770
2500 [1.6bh]: https://github.com/rust-lang/rust/pull/29811
2501 [1.6c]: https://github.com/rust-lang/cargo/pull/2192
2502 [1.6cc]: https://github.com/rust-lang/cargo/pull/2131
2503 [1.6co]: http://doc.rust-lang.org/beta/core/index.html
2504 [1.6dv]: https://github.com/rust-lang/rust/pull/30000
2505 [1.6f]: https://github.com/rust-lang/rust/pull/29129
2506 [1.6m]: https://github.com/rust-lang/rust/pull/29828
2507 [1.6ms]: https://github.com/rust-lang/rust/pull/29604
2508 [1.6p]: https://github.com/rust-lang/rust/pull/29726
2509 [1.6rp]: https://github.com/rust-lang/rust/pull/30034
2510 [1.6rr]: https://github.com/rust-lang/cargo/pull/2134
2511 [1.6s]: https://github.com/rust-lang/rust/pull/29675
2512 [1.6ts]: https://github.com/rust-lang/rust/issues/21546
2513 [1.6uc]: https://github.com/rust-lang/rust/pull/29837
2514 [1.6us]: https://github.com/rust-lang/rust/pull/29383
2515 [1.6xc]: https://github.com/rust-lang/rust/issues/30123
2516 [RFC 1184]: https://github.com/rust-lang/rfcs/blob/master/text/1184-stabilize-no_std.md
2517 [RFC 1241]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
2518 [`ErrorKind::UnexpectedEof`]: http://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html#variant.UnexpectedEof
2519 [`Iterator::max_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.max_by_key
2520 [`Iterator::min_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.min_by_key
2521 [`Mutex::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.get_mut
2522 [`Mutex::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.into_inner
2523 [`Read::read_exact`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_exact
2524 [`RwLock::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.get_mut
2525 [`RwLock::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.into_inner
2526 [`Vec::extend_from_slice`]: http://doc.rust-lang.org/nightly/collections/vec/struct.Vec.html#method.extend_from_slice
2527 [`collections::binary_heap::BinaryHeap::drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.BinaryHeap.html#method.drain
2528 [`collections::binary_heap::Drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.Drain.html
2529 [`collections::hash_map::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.Drain.html
2530 [`collections::hash_map::HashMap::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.HashMap.html#method.drain
2531 [`collections::hash_set::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.Drain.html
2532 [`collections::hash_set::HashSet::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.HashSet.html#method.drain
2533 [`fs::DirBuilder::create`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.create
2534 [`fs::DirBuilder::new`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.new
2535 [`fs::DirBuilder::recursive`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.recursive
2536 [`fs::DirBuilder`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html
2537 [`os::unix::fs::DirBuilderExt::mode`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html#tymethod.mode
2538 [`os::unix::fs::DirBuilderExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html
2539 [`string::Drain`]: http://doc.rust-lang.org/nightly/std/string/struct.Drain.html
2540 [`string::String::drain`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.drain
2541 [`vec::Drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Drain.html
2542 [`vec::Vec::drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.drain
2543 [`vec_deque::Drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.Drain.html
2544 [`vec_deque::VecDeque::drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.VecDeque.html#method.drain
2547 Version 1.5.0 (2015-12-10)
2548 ==========================
2550 * ~700 changes, numerous bugfixes
2556 [`BinaryHeap::from`], [`BinaryHeap::into_sorted_vec`],
2557 [`BinaryHeap::into_vec`], [`Condvar::wait_timeout`],
2558 [`FileTypeExt::is_block_device`], [`FileTypeExt::is_char_device`],
2559 [`FileTypeExt::is_fifo`], [`FileTypeExt::is_socket`],
2560 [`FileTypeExt`], [`Formatter::alternate`], [`Formatter::fill`],
2561 [`Formatter::precision`], [`Formatter::sign_aware_zero_pad`],
2562 [`Formatter::sign_minus`], [`Formatter::sign_plus`],
2563 [`Formatter::width`], [`Iterator::cmp`], [`Iterator::eq`],
2564 [`Iterator::ge`], [`Iterator::gt`], [`Iterator::le`],
2565 [`Iterator::lt`], [`Iterator::ne`], [`Iterator::partial_cmp`],
2566 [`Path::canonicalize`], [`Path::exists`], [`Path::is_dir`],
2567 [`Path::is_file`], [`Path::metadata`], [`Path::read_dir`],
2568 [`Path::read_link`], [`Path::symlink_metadata`],
2569 [`Utf8Error::valid_up_to`], [`Vec::resize`],
2570 [`VecDeque::as_mut_slices`], [`VecDeque::as_slices`],
2571 [`VecDeque::insert`], [`VecDeque::shrink_to_fit`],
2572 [`VecDeque::swap_remove_back`], [`VecDeque::swap_remove_front`],
2573 [`slice::split_first_mut`], [`slice::split_first`],
2574 [`slice::split_last_mut`], [`slice::split_last`],
2575 [`char::from_u32_unchecked`], [`fs::canonicalize`],
2576 [`str::MatchIndices`], [`str::RMatchIndices`],
2577 [`str::match_indices`], [`str::rmatch_indices`],
2578 [`str::slice_mut_unchecked`], [`string::ParseError`].
2579 * Rust applications hosted on crates.io can be installed locally to
2580 `~/.cargo/bin` with the [`cargo install`] command. Among other
2581 things this makes it easier to augment Cargo with new subcommands:
2582 when a binary named e.g. `cargo-foo` is found in `$PATH` it can be
2583 invoked as `cargo foo`.
2584 * Crates with wildcard (`*`) dependencies will [emit warnings when
2585 published][1.5w]. In 1.6 it will no longer be possible to publish
2586 crates with wildcard dependencies.
2591 * The rules determining when a particular lifetime must outlive
2592 a particular value (known as '[dropck]') have been [modified
2593 to not rely on parametricity][1.5p].
2594 * [Implementations of `AsRef` and `AsMut` were added to `Box`, `Rc`,
2595 and `Arc`][1.5a]. Because these smart pointer types implement
2596 `Deref`, this causes breakage in cases where the interior type
2597 contains methods of the same name.
2598 * [Correct a bug in Rc/Arc][1.5c] that caused [dropck] to be unaware
2599 that they could drop their content. Soundness fix.
2600 * All method invocations are [properly checked][1.5wf1] for
2601 [well-formedness][1.5wf2]. Soundness fix.
2602 * Traits whose supertraits contain `Self` are [not object
2603 safe][1.5o]. Soundness fix.
2604 * Target specifications support a [`no_default_libraries`][1.5nd]
2605 setting that controls whether `-nodefaultlibs` is passed to the
2606 linker, and in turn the `is_like_windows` setting no longer affects
2607 the `-nodefaultlibs` flag.
2608 * `#[derive(Show)]`, long-deprecated, [has been removed][1.5ds].
2609 * The `#[inline]` and `#[repr]` attributes [can only appear
2610 in valid locations][1.5at].
2611 * Native libraries linked from the local crate are [passed to
2612 the linker before native libraries from upstream crates][1.5nl].
2613 * Two rarely-used attributes, `#[no_debug]` and
2614 `#[omit_gdb_pretty_printer_section]` [are feature gated][1.5fg].
2615 * Negation of unsigned integers, which has been a warning for
2616 several releases, [is now behind a feature gate and will
2617 generate errors][1.5nu].
2618 * The parser accidentally accepted visibility modifiers on
2619 enum variants, a bug [which has been fixed][1.5ev].
2620 * [A bug was fixed that allowed `use` statements to import unstable
2626 * When evaluating expressions at compile-time that are not
2627 compile-time constants (const-evaluating expressions in non-const
2628 contexts), incorrect code such as overlong bitshifts and arithmetic
2629 overflow will [generate a warning instead of an error][1.5ce],
2630 delaying the error until runtime. This will allow the
2631 const-evaluator to be expanded in the future backwards-compatibly.
2632 * The `improper_ctypes` lint [no longer warns about using `isize` and
2633 `usize` in FFI][1.5ict].
2638 * `Arc<T>` and `Rc<T>` are [covariant with respect to `T` instead of
2640 * `Default` is [implemented for mutable slices][1.5d].
2641 * `FromStr` is [implemented for `SockAddrV4` and `SockAddrV6`][1.5s].
2642 * There are now `From` conversions [between floating point
2643 types][1.5f] where the conversions are lossless.
2644 * Thera are now `From` conversions [between integer types][1.5i] where
2645 the conversions are lossless.
2646 * [`fs::Metadata` implements `Clone`][1.5fs].
2647 * The `parse` method [accepts a leading "+" when parsing
2649 * [`AsMut` is implemented for `Vec`][1.5am].
2650 * The `clone_from` implementations for `String` and `BinaryHeap` [have
2651 been optimized][1.5cf] and no longer rely on the default impl.
2652 * The `extern "Rust"`, `extern "C"`, `unsafe extern "Rust"` and
2653 `unsafe extern "C"` function types now [implement `Clone`,
2654 `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and
2655 `fmt::Debug` for up to 12 arguments][1.5fp].
2656 * [Dropping `Vec`s is much faster in unoptimized builds when the
2657 element types don't implement `Drop`][1.5dv].
2658 * A bug that caused in incorrect behavior when [combining `VecDeque`
2659 with zero-sized types][1.5vdz] was resolved.
2660 * [`PartialOrd` for slices is faster][1.5po].
2665 * [Crate metadata size was reduced by 20%][1.5md].
2666 * [Improvements to code generation reduced the size of libcore by 3.3
2667 MB and rustc's memory usage by 18MB][1.5m].
2668 * [Improvements to deref translation increased performance in
2669 unoptimized builds][1.5dr].
2670 * Various errors in trait resolution [are deduplicated to only be
2671 reported once][1.5te].
2672 * Rust has preliminary [support for rumprun kernels][1.5rr].
2673 * Rust has preliminary [support for NetBSD on amd64][1.5na].
2675 [1.5use]: https://github.com/rust-lang/rust/pull/28364
2676 [1.5po]: https://github.com/rust-lang/rust/pull/28436
2677 [1.5ev]: https://github.com/rust-lang/rust/pull/28442
2678 [1.5nu]: https://github.com/rust-lang/rust/pull/28468
2679 [1.5dr]: https://github.com/rust-lang/rust/pull/28491
2680 [1.5vdz]: https://github.com/rust-lang/rust/pull/28494
2681 [1.5md]: https://github.com/rust-lang/rust/pull/28521
2682 [1.5fg]: https://github.com/rust-lang/rust/pull/28522
2683 [1.5dv]: https://github.com/rust-lang/rust/pull/28531
2684 [1.5na]: https://github.com/rust-lang/rust/pull/28543
2685 [1.5fp]: https://github.com/rust-lang/rust/pull/28560
2686 [1.5rr]: https://github.com/rust-lang/rust/pull/28593
2687 [1.5cf]: https://github.com/rust-lang/rust/pull/28602
2688 [1.5nl]: https://github.com/rust-lang/rust/pull/28605
2689 [1.5te]: https://github.com/rust-lang/rust/pull/28645
2690 [1.5at]: https://github.com/rust-lang/rust/pull/28650
2691 [1.5am]: https://github.com/rust-lang/rust/pull/28663
2692 [1.5m]: https://github.com/rust-lang/rust/pull/28778
2693 [1.5ict]: https://github.com/rust-lang/rust/pull/28779
2694 [1.5a]: https://github.com/rust-lang/rust/pull/28811
2695 [1.5pi]: https://github.com/rust-lang/rust/pull/28826
2696 [1.5ce]: https://github.com/rust-lang/rfcs/blob/master/text/1229-compile-time-asserts.md
2697 [1.5p]: https://github.com/rust-lang/rfcs/blob/master/text/1238-nonparametric-dropck.md
2698 [1.5i]: https://github.com/rust-lang/rust/pull/28921
2699 [1.5fs]: https://github.com/rust-lang/rust/pull/29021
2700 [1.5f]: https://github.com/rust-lang/rust/pull/29129
2701 [1.5ds]: https://github.com/rust-lang/rust/pull/29148
2702 [1.5s]: https://github.com/rust-lang/rust/pull/29190
2703 [1.5d]: https://github.com/rust-lang/rust/pull/29245
2704 [1.5o]: https://github.com/rust-lang/rust/pull/29259
2705 [1.5nd]: https://github.com/rust-lang/rust/pull/28578
2706 [1.5wf2]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
2707 [1.5wf1]: https://github.com/rust-lang/rust/pull/28669
2708 [dropck]: https://doc.rust-lang.org/nightly/nomicon/dropck.html
2709 [1.5c]: https://github.com/rust-lang/rust/pull/29110
2710 [1.5w]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
2711 [`cargo install`]: https://github.com/rust-lang/rfcs/blob/master/text/1200-cargo-install.md
2712 [`BinaryHeap::from`]: http://doc.rust-lang.org/nightly/std/convert/trait.From.html#method.from
2713 [`BinaryHeap::into_sorted_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_sorted_vec
2714 [`BinaryHeap::into_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_vec
2715 [`Condvar::wait_timeout`]: http://doc.rust-lang.org/nightly/std/sync/struct.Condvar.html#method.wait_timeout
2716 [`FileTypeExt::is_block_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_block_device
2717 [`FileTypeExt::is_char_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_char_device
2718 [`FileTypeExt::is_fifo`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_fifo
2719 [`FileTypeExt::is_socket`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_socket
2720 [`FileTypeExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html
2721 [`Formatter::alternate`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.alternate
2722 [`Formatter::fill`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.fill
2723 [`Formatter::precision`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.precision
2724 [`Formatter::sign_aware_zero_pad`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_aware_zero_pad
2725 [`Formatter::sign_minus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_minus
2726 [`Formatter::sign_plus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_plus
2727 [`Formatter::width`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.width
2728 [`Iterator::cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.cmp
2729 [`Iterator::eq`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.eq
2730 [`Iterator::ge`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ge
2731 [`Iterator::gt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.gt
2732 [`Iterator::le`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.le
2733 [`Iterator::lt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.lt
2734 [`Iterator::ne`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ne
2735 [`Iterator::partial_cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.partial_cmp
2736 [`Path::canonicalize`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.canonicalize
2737 [`Path::exists`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.exists
2738 [`Path::is_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_dir
2739 [`Path::is_file`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_file
2740 [`Path::metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.metadata
2741 [`Path::read_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_dir
2742 [`Path::read_link`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_link
2743 [`Path::symlink_metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.symlink_metadata
2744 [`Utf8Error::valid_up_to`]: http://doc.rust-lang.org/nightly/core/str/struct.Utf8Error.html#method.valid_up_to
2745 [`Vec::resize`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.resize
2746 [`VecDeque::as_mut_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_mut_slices
2747 [`VecDeque::as_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_slices
2748 [`VecDeque::insert`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.insert
2749 [`VecDeque::shrink_to_fit`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.shrink_to_fit
2750 [`VecDeque::swap_remove_back`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_back
2751 [`VecDeque::swap_remove_front`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_front
2752 [`slice::split_first_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first_mut
2753 [`slice::split_first`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first
2754 [`slice::split_last_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last_mut
2755 [`slice::split_last`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last
2756 [`char::from_u32_unchecked`]: http://doc.rust-lang.org/nightly/std/char/fn.from_u32_unchecked.html
2757 [`fs::canonicalize`]: http://doc.rust-lang.org/nightly/std/fs/fn.canonicalize.html
2758 [`str::MatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.MatchIndices.html
2759 [`str::RMatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.RMatchIndices.html
2760 [`str::match_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.match_indices
2761 [`str::rmatch_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatch_indices
2762 [`str::slice_mut_unchecked`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.slice_mut_unchecked
2763 [`string::ParseError`]: http://doc.rust-lang.org/nightly/std/string/enum.ParseError.html
2765 Version 1.4.0 (2015-10-29)
2766 ==========================
2768 * ~1200 changes, numerous bugfixes
2773 * Windows builds targeting the 64-bit MSVC ABI and linker (instead of
2774 GNU) are now supported and recommended for use.
2779 * [Several changes have been made to fix type soundness and improve
2780 the behavior of associated types][sound]. See [RFC 1214]. Although
2781 we have mostly introduced these changes as warnings this release, to
2782 become errors next release, there are still some scenarios that will
2783 see immediate breakage.
2784 * [The `str::lines` and `BufRead::lines` iterators treat `\r\n` as
2785 line breaks in addition to `\n`][crlf].
2786 * [Loans of `'static` lifetime extend to the end of a function][stat].
2787 * [`str::parse` no longer introduces avoidable rounding error when
2788 parsing floating point numbers. Together with earlier changes to
2789 float formatting/output, "round trips" like f.to_string().parse()
2790 now preserve the value of f exactly. Additionally, leading plus
2791 signs are now accepted][fp3].
2797 * `use` statements that import multiple items [can now rename
2798 them][i], as in `use foo::{bar as kitten, baz as puppy}`.
2799 * [Binops work correctly on fat pointers][binfat].
2800 * `pub extern crate`, which does not behave as expected, [issues a
2801 warning][pec] until a better solution is found.
2806 * [Many APIs were stabilized][stab]: `<Box<str>>::into_string`,
2807 [`Arc::downgrade`], [`Arc::get_mut`], [`Arc::make_mut`],
2808 [`Arc::try_unwrap`], [`Box::from_raw`], [`Box::into_raw`], [`CStr::to_str`],
2809 [`CStr::to_string_lossy`], [`CString::from_raw`], [`CString::into_raw`],
2810 [`IntoRawFd::into_raw_fd`], [`IntoRawFd`],
2811 `IntoRawHandle::into_raw_handle`, `IntoRawHandle`,
2812 `IntoRawSocket::into_raw_socket`, `IntoRawSocket`, [`Rc::downgrade`],
2813 [`Rc::get_mut`], [`Rc::make_mut`], [`Rc::try_unwrap`], [`Result::expect`],
2814 [`String::into_boxed_str`], [`TcpStream::read_timeout`],
2815 [`TcpStream::set_read_timeout`], [`TcpStream::set_write_timeout`],
2816 [`TcpStream::write_timeout`], [`UdpSocket::read_timeout`],
2817 [`UdpSocket::set_read_timeout`], [`UdpSocket::set_write_timeout`],
2818 [`UdpSocket::write_timeout`], `Vec::append`, `Vec::split_off`,
2819 [`VecDeque::append`], [`VecDeque::retain`], [`VecDeque::split_off`],
2820 [`rc::Weak::upgrade`], [`rc::Weak`], [`slice::Iter::as_slice`],
2821 [`slice::IterMut::into_slice`], [`str::CharIndices::as_str`],
2822 [`str::Chars::as_str`], [`str::split_at_mut`], [`str::split_at`],
2823 [`sync::Weak::upgrade`], [`sync::Weak`], [`thread::park_timeout`],
2825 * [Some APIs were deprecated][dep]: `BTreeMap::with_b`,
2826 `BTreeSet::with_b`, `Option::as_mut_slice`, `Option::as_slice`,
2827 `Result::as_mut_slice`, `Result::as_slice`, `f32::from_str_radix`,
2828 `f64::from_str_radix`.
2829 * [Reverse-searching strings is faster with the 'two-way'
2831 * [`std::io::copy` allows `?Sized` arguments][cc].
2832 * The `Windows`, `Chunks`, and `ChunksMut` iterators over slices all
2833 [override `count`, `nth` and `last` with an O(1)
2834 implementation][it].
2835 * [`Default` is implemented for arrays up to `[T; 32]`][d].
2836 * [`IntoRawFd` has been added to the Unix-specific prelude,
2837 `IntoRawSocket` and `IntoRawHandle` to the Windows-specific
2839 * [`Extend<String>` and `FromIterator<String` are both implemented for
2841 * [`IntoIterator` is implemented for references to `Option` and
2843 * [`HashMap` and `HashSet` implement `Extend<&T>` where `T:
2844 Copy`][ext] as part of [RFC 839]. This will cause type inferance
2845 breakage in rare situations.
2846 * [`BinaryHeap` implements `Debug`][bh2].
2847 * [`Borrow` and `BorrowMut` are implemented for fixed-size
2849 * [`extern fn`s with the "Rust" and "C" ABIs implement common
2850 traits including `Eq`, `Ord`, `Debug`, `Hash`][fp].
2851 * [String comparison is faster][faststr].
2852 * `&mut T` where `T: std::fmt::Write` [also implements
2853 `std::fmt::Write`][mutw].
2854 * [A stable regression in `VecDeque::push_back` and other
2855 capicity-altering methods that caused panics for zero-sized types
2857 * [Function pointers implement traits for up to 12 parameters][fp2].
2862 * The compiler [no longer uses the 'morestack' feature to prevent
2863 stack overflow][mm]. Instead it uses guard pages and stack
2864 probes (though stack probes are not yet implemented on any platform
2866 * [The compiler matches traits faster when projections are involved][p].
2867 * The 'improper_ctypes' lint [no longer warns about use of `isize` and
2869 * [Cargo now displays useful information about what its doing during
2870 `cargo update`][cu].
2872 [`Arc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.downgrade
2873 [`Arc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.make_mut
2874 [`Arc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.get_mut
2875 [`Arc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.try_unwrap
2876 [`Box::from_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.from_raw
2877 [`Box::into_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.into_raw
2878 [`CStr::to_str`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_str
2879 [`CStr::to_string_lossy`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_string_lossy
2880 [`CString::from_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.from_raw
2881 [`CString::into_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_raw
2882 [`IntoRawFd::into_raw_fd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html#tymethod.into_raw_fd
2883 [`IntoRawFd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html
2884 [`Rc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.downgrade
2885 [`Rc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.get_mut
2886 [`Rc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.make_mut
2887 [`Rc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.try_unwrap
2888 [`Result::expect`]: http://doc.rust-lang.org/nightly/core/result/enum.Result.html#method.expect
2889 [`String::into_boxed_str`]: http://doc.rust-lang.org/nightly/collections/string/struct.String.html#method.into_boxed_str
2890 [`TcpStream::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
2891 [`TcpStream::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
2892 [`TcpStream::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
2893 [`TcpStream::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
2894 [`UdpSocket::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
2895 [`UdpSocket::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
2896 [`UdpSocket::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
2897 [`UdpSocket::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
2898 [`VecDeque::append`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.append
2899 [`VecDeque::retain`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.retain
2900 [`VecDeque::split_off`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.split_off
2901 [`rc::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html#method.upgrade
2902 [`rc::Weak`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html
2903 [`slice::Iter::as_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.Iter.html#method.as_slice
2904 [`slice::IterMut::into_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.IterMut.html#method.into_slice
2905 [`str::CharIndices::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.CharIndices.html#method.as_str
2906 [`str::Chars::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.Chars.html#method.as_str
2907 [`str::split_at_mut`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at_mut
2908 [`str::split_at`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at
2909 [`sync::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html#method.upgrade
2910 [`sync::Weak`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html
2911 [`thread::park_timeout`]: http://doc.rust-lang.org/nightly/std/thread/fn.park_timeout.html
2912 [`thread::sleep`]: http://doc.rust-lang.org/nightly/std/thread/fn.sleep.html
2913 [bh2]: https://github.com/rust-lang/rust/pull/28156
2914 [binfat]: https://github.com/rust-lang/rust/pull/28270
2915 [bm]: https://github.com/rust-lang/rust/pull/28197
2916 [cc]: https://github.com/rust-lang/rust/pull/27531
2917 [crlf]: https://github.com/rust-lang/rust/pull/28034
2918 [cu]: https://github.com/rust-lang/cargo/pull/1931
2919 [d]: https://github.com/rust-lang/rust/pull/27825
2920 [dep]: https://github.com/rust-lang/rust/pull/28339
2921 [es]: https://github.com/rust-lang/rust/pull/27956
2922 [ext]: https://github.com/rust-lang/rust/pull/28094
2923 [faststr]: https://github.com/rust-lang/rust/pull/28338
2924 [ffi]: https://github.com/rust-lang/rust/pull/28779
2925 [fp]: https://github.com/rust-lang/rust/pull/28268
2926 [fp2]: https://github.com/rust-lang/rust/pull/28560
2927 [fp3]: https://github.com/rust-lang/rust/pull/27307
2928 [i]: https://github.com/rust-lang/rust/pull/27451
2929 [into2]: https://github.com/rust-lang/rust/pull/28039
2930 [it]: https://github.com/rust-lang/rust/pull/27652
2931 [mm]: https://github.com/rust-lang/rust/pull/27338
2932 [mutw]: https://github.com/rust-lang/rust/pull/28368
2933 [sound]: https://github.com/rust-lang/rust/pull/27641
2934 [p]: https://github.com/rust-lang/rust/pull/27866
2935 [pec]: https://github.com/rust-lang/rust/pull/28486
2936 [pr]: https://github.com/rust-lang/rust/pull/27896
2937 [RFC 839]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
2938 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
2939 [s]: https://github.com/rust-lang/rust/pull/27474
2940 [stab]: https://github.com/rust-lang/rust/pull/28339
2941 [stat]: https://github.com/rust-lang/rust/pull/28321
2942 [vd]: https://github.com/rust-lang/rust/pull/28494
2944 Version 1.3.0 (2015-09-17)
2945 ==============================
2947 * ~900 changes, numerous bugfixes
2952 * The [new object lifetime defaults][nold] have been [turned
2953 on][nold2] after a cycle of warnings about the change. Now types
2954 like `&'a Box<Trait>` (or `&'a Rc<Trait>`, etc) will change from
2955 being interpreted as `&'a Box<Trait+'a>` to `&'a
2956 Box<Trait+'static>`.
2957 * [The Rustonomicon][nom] is a new book in the official documentation
2958 that dives into writing unsafe Rust.
2959 * The [`Duration`] API, [has been stabilized][ds]. This basic unit of
2960 timekeeping is employed by other std APIs, as well as out-of-tree
2966 * The [new object lifetime defaults][nold] have been [turned
2967 on][nold2] after a cycle of warnings about the change.
2968 * There is a known [regression][lr] in how object lifetime elision is
2969 interpreted, the proper solution for which is undetermined.
2970 * The `#[prelude_import]` attribute, an internal implementation
2971 detail, was accidentally stabilized previously. [It has been put
2972 behind the `prelude_import` feature gate][pi]. This change is
2973 believed to break no existing code.
2974 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
2975 [more sane for dynamically sized types][dst3]. Code that relied on
2976 the previous behavior is thought to be broken.
2977 * The `dropck` rules, which checks that destructors can't access
2978 destroyed values, [have been updated][dropck] to match the
2979 [RFC][dropckrfc]. This fixes some soundness holes, and as such will
2980 cause some previously-compiling code to no longer build.
2985 * The [new object lifetime defaults][nold] have been [turned
2986 on][nold2] after a cycle of warnings about the change.
2987 * Semicolons may [now follow types and paths in
2988 macros](https://github.com/rust-lang/rust/pull/27000).
2989 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
2990 [more sane for dynamically sized types][dst3]. Code that relied on
2991 the previous behavior is not known to exist, and suspected to be
2993 * `'static` variables [may now be recursive][st].
2994 * `ref` bindings choose between [`Deref`] and [`DerefMut`]
2995 implementations correctly.
2996 * The `dropck` rules, which checks that destructors can't access
2997 destroyed values, [have been updated][dropck] to match the
3003 * The [`Duration`] API, [has been stabilized][ds], as well as the
3004 `std::time` module, which presently contains only `Duration`.
3005 * `Box<str>` and `Box<[T]>` both implement `Clone`.
3006 * The owned C string, [`CString`], implements [`Borrow`] and the
3007 borrowed C string, [`CStr`], implements [`ToOwned`]. The two of
3008 these allow C strings to be borrowed and cloned in generic code.
3009 * [`CStr`] implements [`Debug`].
3010 * [`AtomicPtr`] implements [`Debug`].
3011 * [`Error`] trait objects [can be downcast to their concrete types][e]
3012 in many common configurations, using the [`is`], [`downcast`],
3013 [`downcast_ref`] and [`downcast_mut`] methods, similarly to the
3015 * Searching for substrings now [employs the two-way algorithm][search]
3016 instead of doing a naive search. This gives major speedups to a
3017 number of methods, including [`contains`][sc], [`find`][sf],
3018 [`rfind`][srf], [`split`][ss]. [`starts_with`][ssw] and
3019 [`ends_with`][sew] are also faster.
3020 * The performance of `PartialEq` for slices is [much faster][ps].
3021 * The [`Hash`] trait offers the default method, [`hash_slice`], which
3022 is overridden and optimized by the implementations for scalars.
3023 * The [`Hasher`] trait now has a number of specialized `write_*`
3024 methods for primitive types, for efficiency.
3025 * The I/O-specific error type, [`std::io::Error`][ie], gained a set of
3026 methods for accessing the 'inner error', if any: [`get_ref`][iegr],
3027 [`get_mut`][iegm], [`into_inner`][ieii]. As well, the implementation
3028 of [`std::error::Error::cause`][iec] also delegates to the inner
3030 * [`process::Child`][pc] gained the [`id`] method, which returns a
3031 `u32` representing the platform-specific process identifier.
3032 * The [`connect`] method on slices is deprecated, replaced by the new
3033 [`join`] method (note that both of these are on the *unstable*
3034 [`SliceConcatExt`] trait, but through the magic of the prelude are
3035 available to stable code anyway).
3036 * The [`Div`] operator is implemented for [`Wrapping`] types.
3037 * [`DerefMut` is implemented for `String`][dms].
3038 * Performance of SipHash (the default hasher for `HashMap`) is
3039 [better for long data][sh].
3040 * [`AtomicPtr`] implements [`Send`].
3041 * The [`read_to_end`] implementations for [`Stdin`] and [`File`]
3042 are now [specialized to use uninitalized buffers for increased
3044 * Lifetime parameters of foreign functions [are now resolved
3050 * Rust can now, with some coercion, [produce programs that run on
3051 Windows XP][xp], though XP is not considered a supported platform.
3052 * Porting Rust on Windows from the GNU toolchain to MSVC continues
3053 ([1][win1], [2][win2], [3][win3], [4][win4]). It is still not
3054 recommended for use in 1.3, though should be fully-functional
3055 in the [64-bit 1.4 beta][b14].
3056 * On Fedora-based systems installation will [properly configure the
3057 dynamic linker][fl].
3058 * The compiler gained many new extended error descriptions, which can
3059 be accessed with the `--explain` flag.
3060 * The `dropck` pass, which checks that destructors can't access
3061 destroyed values, [has been rewritten][dropck]. This fixes some
3062 soundness holes, and as such will cause some previously-compiling
3063 code to no longer build.
3064 * `rustc` now uses [LLVM to write archive files where possible][ar].
3065 Eventually this will eliminate the compiler's dependency on the ar
3067 * Rust has [preliminary support for i686 FreeBSD][fb] (it has long
3068 supported FreeBSD on x86_64).
3069 * The [`unused_mut`][lum], [`unconditional_recursion`][lur],
3070 [`improper_ctypes`][lic], and [`negate_unsigned`][lnu] lints are
3072 * If landing pads are disabled (with `-Z no-landing-pads`), [`panic!`
3073 will kill the process instead of leaking][nlp].
3075 [`Any`]: http://doc.rust-lang.org/nightly/std/any/trait.Any.html
3076 [`AtomicPtr`]: http://doc.rust-lang.org/nightly/std/sync/atomic/struct.AtomicPtr.html
3077 [`Borrow`]: http://doc.rust-lang.org/nightly/std/borrow/trait.Borrow.html
3078 [`CStr`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html
3079 [`CString`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html
3080 [`Debug`]: http://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
3081 [`DerefMut`]: http://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
3082 [`Deref`]: http://doc.rust-lang.org/nightly/std/ops/trait.Deref.html
3083 [`Div`]: http://doc.rust-lang.org/nightly/std/ops/trait.Div.html
3084 [`Duration`]: http://doc.rust-lang.org/nightly/std/time/struct.Duration.html
3085 [`Error`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html
3086 [`File`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html
3087 [`Hash`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html
3088 [`Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
3089 [`Send`]: http://doc.rust-lang.org/nightly/std/marker/trait.Send.html
3090 [`SliceConcatExt`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html
3091 [`Stdin`]: http://doc.rust-lang.org/nightly/std/io/struct.Stdin.html
3092 [`ToOwned`]: http://doc.rust-lang.org/nightly/std/borrow/trait.ToOwned.html
3093 [`Wrapping`]: http://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
3094 [`connect`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.connect
3095 [`downcast_mut`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_mut
3096 [`downcast_ref`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_ref
3097 [`downcast`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast
3098 [`hash_slice`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
3099 [`id`]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html#method.id
3100 [`is`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.is
3101 [`join`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.join
3102 [`read_to_end`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_to_end
3103 [ar]: https://github.com/rust-lang/rust/pull/26926
3104 [b14]: https://static.rust-lang.org/dist/rust-beta-x86_64-pc-windows-msvc.msi
3105 [dms]: https://github.com/rust-lang/rust/pull/26241
3106 [dropck]: https://github.com/rust-lang/rust/pull/27261
3107 [dropckrfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
3108 [ds]: https://github.com/rust-lang/rust/pull/26818
3109 [dst1]: http://doc.rust-lang.org/nightly/std/mem/fn.size_of_val.html
3110 [dst2]: http://doc.rust-lang.org/nightly/std/mem/fn.align_of_val.html
3111 [dst3]: https://github.com/rust-lang/rust/pull/27351
3112 [e]: https://github.com/rust-lang/rust/pull/24793
3113 [f]: https://github.com/rust-lang/rust/pull/26588
3114 [fb]: https://github.com/rust-lang/rust/pull/26959
3115 [fl]: https://github.com/rust-lang/rust-installer/pull/41
3116 [hs]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
3117 [ie]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html
3118 [iec]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.cause
3119 [iegm]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_mut
3120 [iegr]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_ref
3121 [ieii]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.into_inner
3122 [lic]: https://github.com/rust-lang/rust/pull/26583
3123 [lnu]: https://github.com/rust-lang/rust/pull/27026
3124 [lr]: https://github.com/rust-lang/rust/issues/27248
3125 [lum]: https://github.com/rust-lang/rust/pull/26378
3126 [lur]: https://github.com/rust-lang/rust/pull/26783
3127 [nlp]: https://github.com/rust-lang/rust/pull/27176
3128 [nold2]: https://github.com/rust-lang/rust/pull/27045
3129 [nold]: https://github.com/rust-lang/rfcs/blob/master/text/1156-adjust-default-object-bounds.md
3130 [nom]: http://doc.rust-lang.org/nightly/nomicon/
3131 [pc]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html
3132 [pi]: https://github.com/rust-lang/rust/pull/26699
3133 [ps]: https://github.com/rust-lang/rust/pull/26884
3134 [rte]: https://github.com/rust-lang/rust/pull/26950
3135 [sc]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.contains
3136 [search]: https://github.com/rust-lang/rust/pull/26327
3137 [sew]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.ends_with
3138 [sf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.find
3139 [sh]: https://github.com/rust-lang/rust/pull/27280
3140 [srf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rfind
3141 [ss]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split
3142 [ssw]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.starts_with
3143 [st]: https://github.com/rust-lang/rust/pull/26630
3144 [win1]: https://github.com/rust-lang/rust/pull/26569
3145 [win2]: https://github.com/rust-lang/rust/pull/26741
3146 [win3]: https://github.com/rust-lang/rust/pull/26741
3147 [win4]: https://github.com/rust-lang/rust/pull/27210
3148 [xp]: https://github.com/rust-lang/rust/pull/26569
3150 Version 1.2.0 (2015-08-07)
3151 ==========================
3153 * ~1200 changes, numerous bugfixes
3158 * [Dynamically-sized-type coercions][dst] allow smart pointer types
3159 like `Rc` to contain types without a fixed size, arrays and trait
3160 objects, finally enabling use of `Rc<[T]>` and completing the
3161 implementation of DST.
3162 * [Parallel codegen][parcodegen] is now working again, which can
3163 substantially speed up large builds in debug mode; It also gets
3164 another ~33% speedup when bootstrapping on a 4 core machine (using 8
3165 jobs). It's not enabled by default, but will be "in the near
3166 future". It can be activated with the `-C codegen-units=N` flag to
3168 * This is the first release with [experimental support for linking
3169 with the MSVC linker and lib C on Windows (instead of using the GNU
3170 variants via MinGW)][win]. It is yet recommended only for the most
3171 intrepid Rusticians.
3172 * Benchmark compilations are showing a 30% improvement in
3173 bootstrapping over 1.1.
3178 * The [`to_uppercase`] and [`to_lowercase`] methods on `char` now do
3179 unicode case mapping, which is a previously-planned change in
3180 behavior and considered a bugfix.
3181 * [`mem::align_of`] now specifies [the *minimum alignment* for
3182 T][align], which is usually the alignment programs are interested
3183 in, and the same value reported by clang's
3184 `alignof`. [`mem::min_align_of`] is deprecated. This is not known to
3186 * [The `#[packed]` attribute is no longer silently accepted by the
3187 compiler][packed]. This attribute did nothing and code that
3188 mentioned it likely did not work as intended.
3189 * Associated type defaults are [now behind the
3190 `associated_type_defaults` feature gate][ad]. In 1.1 associated type
3191 defaults *did not work*, but could be mentioned syntactically. As
3192 such this breakage has minimal impact.
3197 * Patterns with `ref mut` now correctly invoke [`DerefMut`] when
3198 matching against dereferencable values.
3203 * The [`Extend`] trait, which grows a collection from an iterator, is
3204 implemented over iterators of references, for `String`, `Vec`,
3205 `LinkedList`, `VecDeque`, `EnumSet`, `BinaryHeap`, `VecMap`,
3206 `BTreeSet` and `BTreeMap`. [RFC][extend-rfc].
3207 * The [`iter::once`] function returns an iterator that yields a single
3208 element, and [`iter::empty`] returns an iterator that yields no
3210 * The [`matches`] and [`rmatches`] methods on `str` return iterators
3211 over substring matches.
3212 * [`Cell`] and [`RefCell`] both implement `Eq`.
3213 * A number of methods for wrapping arithmetic are added to the
3214 integral types, [`wrapping_div`], [`wrapping_rem`],
3215 [`wrapping_neg`], [`wrapping_shl`], [`wrapping_shr`]. These are in
3216 addition to the existing [`wrapping_add`], [`wrapping_sub`], and
3217 [`wrapping_mul`] methods, and alternatives to the [`Wrapping`]
3218 type.. It is illegal for the default arithmetic operations in Rust
3219 to overflow; the desire to wrap must be explicit.
3220 * The `{:#?}` formatting specifier [displays the alternate,
3221 pretty-printed][debugfmt] form of the `Debug` formatter. This
3222 feature was actually introduced prior to 1.0 with little
3224 * [`fmt::Formatter`] implements [`fmt::Write`], a `fmt`-specific trait
3225 for writing data to formatted strings, similar to [`io::Write`].
3226 * [`fmt::Formatter`] adds 'debug builder' methods, [`debug_struct`],
3227 [`debug_tuple`], [`debug_list`], [`debug_set`], [`debug_map`]. These
3228 are used by code generators to emit implementations of [`Debug`].
3229 * `str` has new [`to_uppercase`][strup] and [`to_lowercase`][strlow]
3230 methods that convert case, following Unicode case mapping.
3231 * It is now easier to handle poisoned locks. The [`PoisonError`]
3232 type, returned by failing lock operations, exposes `into_inner`,
3233 `get_ref`, and `get_mut`, which all give access to the inner lock
3234 guard, and allow the poisoned lock to continue to operate. The
3235 `is_poisoned` method of [`RwLock`] and [`Mutex`] can poll for a
3236 poisoned lock without attempting to take the lock.
3237 * On Unix the [`FromRawFd`] trait is implemented for [`Stdio`], and
3238 [`AsRawFd`] for [`ChildStdin`], [`ChildStdout`], [`ChildStderr`].
3239 On Windows the `FromRawHandle` trait is implemented for `Stdio`,
3240 and `AsRawHandle` for `ChildStdin`, `ChildStdout`,
3242 * [`io::ErrorKind`] has a new variant, `InvalidData`, which indicates
3248 * `rustc` employs smarter heuristics for guessing at [typos].
3249 * `rustc` emits more efficient code for [no-op conversions between
3250 unsafe pointers][nop].
3251 * Fat pointers are now [passed in pairs of immediate arguments][fat],
3252 resulting in faster compile times and smaller code.
3254 [`Extend`]: https://doc.rust-lang.org/nightly/std/iter/trait.Extend.html
3255 [extend-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
3256 [`iter::once`]: https://doc.rust-lang.org/nightly/std/iter/fn.once.html
3257 [`iter::empty`]: https://doc.rust-lang.org/nightly/std/iter/fn.empty.html
3258 [`matches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.matches
3259 [`rmatches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatches
3260 [`Cell`]: https://doc.rust-lang.org/nightly/std/cell/struct.Cell.html
3261 [`RefCell`]: https://doc.rust-lang.org/nightly/std/cell/struct.RefCell.html
3262 [`wrapping_add`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_add
3263 [`wrapping_sub`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_sub
3264 [`wrapping_mul`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_mul
3265 [`wrapping_div`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_div
3266 [`wrapping_rem`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_rem
3267 [`wrapping_neg`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_neg
3268 [`wrapping_shl`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shl
3269 [`wrapping_shr`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shr
3270 [`Wrapping`]: https://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
3271 [`fmt::Formatter`]: https://doc.rust-lang.org/nightly/std/fmt/struct.Formatter.html
3272 [`fmt::Write`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Write.html
3273 [`io::Write`]: https://doc.rust-lang.org/nightly/std/io/trait.Write.html
3274 [`debug_struct`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_struct
3275 [`debug_tuple`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_tuple
3276 [`debug_list`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_list
3277 [`debug_set`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_set
3278 [`debug_map`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_map
3279 [`Debug`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
3280 [strup]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_uppercase
3281 [strlow]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_lowercase
3282 [`to_uppercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_uppercase
3283 [`to_lowercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_lowercase
3284 [`PoisonError`]: https://doc.rust-lang.org/nightly/std/sync/struct.PoisonError.html
3285 [`RwLock`]: https://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html
3286 [`Mutex`]: https://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html
3287 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
3288 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
3289 [`Stdio`]: https://doc.rust-lang.org/nightly/std/process/struct.Stdio.html
3290 [`ChildStdin`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdin.html
3291 [`ChildStdout`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdout.html
3292 [`ChildStderr`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStderr.html
3293 [`io::ErrorKind`]: https://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html
3294 [debugfmt]: https://www.reddit.com/r/rust/comments/3ceaui/psa_produces_prettyprinted_debug_output/
3295 [`DerefMut`]: https://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
3296 [`mem::align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.align_of.html
3297 [align]: https://github.com/rust-lang/rust/pull/25646
3298 [`mem::min_align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.min_align_of.html
3299 [typos]: https://github.com/rust-lang/rust/pull/26087
3300 [nop]: https://github.com/rust-lang/rust/pull/26336
3301 [fat]: https://github.com/rust-lang/rust/pull/26411
3302 [dst]: https://github.com/rust-lang/rfcs/blob/master/text/0982-dst-coercion.md
3303 [parcodegen]: https://github.com/rust-lang/rust/pull/26018
3304 [packed]: https://github.com/rust-lang/rust/pull/25541
3305 [ad]: https://github.com/rust-lang/rust/pull/27382
3306 [win]: https://github.com/rust-lang/rust/pull/25350
3308 Version 1.1.0 (2015-06-25)
3309 =========================
3311 * ~850 changes, numerous bugfixes
3316 * The [`std::fs` module has been expanded][fs] to expand the set of
3317 functionality exposed:
3318 * `DirEntry` now supports optimizations like `file_type` and `metadata` which
3319 don't incur a syscall on some platforms.
3320 * A `symlink_metadata` function has been added.
3321 * The `fs::Metadata` structure now lowers to its OS counterpart, providing
3322 access to all underlying information.
3323 * The compiler now contains extended explanations of many errors. When an error
3324 with an explanation occurs the compiler suggests using the `--explain` flag
3325 to read the explanation. Error explanations are also [available online][err-index].
3326 * Thanks to multiple [improvements][sk] to [type checking][pre], as
3327 well as other work, the time to bootstrap the compiler decreased by
3333 * The [`str::split_whitespace`] method splits a string on unicode
3334 whitespace boundaries.
3335 * On both Windows and Unix, new extension traits provide conversion of
3336 I/O types to and from the underlying system handles. On Unix, these
3337 traits are [`FromRawFd`] and [`AsRawFd`], on Windows `FromRawHandle`
3338 and `AsRawHandle`. These are implemented for `File`, `TcpStream`,
3339 `TcpListener`, and `UpdSocket`. Further implementations for
3340 `std::process` will be stabilized later.
3341 * On Unix, [`std::os::unix::symlink`] creates symlinks. On
3342 Windows, symlinks can be created with
3343 `std::os::windows::symlink_dir` and
3344 `std::os::windows::symlink_file`.
3345 * The `mpsc::Receiver` type can now be converted into an iterator with
3346 `into_iter` on the [`IntoIterator`] trait.
3347 * `Ipv4Addr` can be created from `u32` with the `From<u32>`
3348 implementation of the [`From`] trait.
3349 * The `Debug` implementation for `RangeFull` [creates output that is
3350 more consistent with other implementations][rf].
3351 * [`Debug` is implemented for `File`][file].
3352 * The `Default` implementation for `Arc` [no longer requires `Sync +
3354 * [The `Iterator` methods `count`, `nth`, and `last` have been
3355 overridden for slices to have O(1) performance instead of O(n)][si].
3356 * Incorrect handling of paths on Windows has been improved in both the
3357 compiler and the standard library.
3358 * [`AtomicPtr` gained a `Default` implementation][ap].
3359 * In accordance with Rust's policy on arithmetic overflow `abs` now
3360 [panics on overflow when debug assertions are enabled][abs].
3361 * The [`Cloned`] iterator, which was accidentally left unstable for
3362 1.0 [has been stabilized][c].
3363 * The [`Incoming`] iterator, which iterates over incoming TCP
3364 connections, and which was accidentally unnamable in 1.0, [is now
3365 properly exported][inc].
3366 * [`BinaryHeap`] no longer corrupts itself [when functions called by
3367 `sift_up` or `sift_down` panic][bh].
3368 * The [`split_off`] method of `LinkedList` [no longer corrupts
3369 the list in certain scenarios][ll].
3374 * Type checking performance [has improved notably][sk] with
3375 [multiple improvements][pre].
3376 * The compiler [suggests code changes][ch] for more errors.
3377 * rustc and it's build system have experimental support for [building
3378 toolchains against MUSL][m] instead of glibc on Linux.
3379 * The compiler defines the `target_env` cfg value, which is used for
3380 distinguishing toolchains that are otherwise for the same
3381 platform. Presently this is set to `gnu` for common GNU Linux
3382 targets and for MinGW targets, and `musl` for MUSL Linux targets.
3383 * The [`cargo rustc`][crc] command invokes a build with custom flags
3385 * [Android executables are always position independent][pie].
3386 * [The `drop_with_repr_extern` lint warns about mixing `repr(C)`
3389 [`str::split_whitespace`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_whitespace
3390 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
3391 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
3392 [`std::os::unix::symlink`]: https://doc.rust-lang.org/nightly/std/os/unix/fs/fn.symlink.html
3393 [`IntoIterator`]: https://doc.rust-lang.org/nightly/std/iter/trait.IntoIterator.html
3394 [`From`]: https://doc.rust-lang.org/nightly/std/convert/trait.From.html
3395 [rf]: https://github.com/rust-lang/rust/pull/24491
3396 [err-index]: https://doc.rust-lang.org/error-index.html
3397 [sk]: https://github.com/rust-lang/rust/pull/24615
3398 [pre]: https://github.com/rust-lang/rust/pull/25323
3399 [file]: https://github.com/rust-lang/rust/pull/24598
3400 [ch]: https://github.com/rust-lang/rust/pull/24683
3401 [arc]: https://github.com/rust-lang/rust/pull/24695
3402 [si]: https://github.com/rust-lang/rust/pull/24701
3403 [ap]: https://github.com/rust-lang/rust/pull/24834
3404 [m]: https://github.com/rust-lang/rust/pull/24777
3405 [fs]: https://github.com/rust-lang/rfcs/blob/master/text/1044-io-fs-2.1.md
3406 [crc]: https://github.com/rust-lang/cargo/pull/1568
3407 [pie]: https://github.com/rust-lang/rust/pull/24953
3408 [abs]: https://github.com/rust-lang/rust/pull/25441
3409 [c]: https://github.com/rust-lang/rust/pull/25496
3410 [`Cloned`]: https://doc.rust-lang.org/nightly/std/iter/struct.Cloned.html
3411 [`Incoming`]: https://doc.rust-lang.org/nightly/std/net/struct.Incoming.html
3412 [inc]: https://github.com/rust-lang/rust/pull/25522
3413 [bh]: https://github.com/rust-lang/rust/pull/25856
3414 [`BinaryHeap`]: https://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html
3415 [ll]: https://github.com/rust-lang/rust/pull/26022
3416 [`split_off`]: https://doc.rust-lang.org/nightly/collections/linked_list/struct.LinkedList.html#method.split_off
3417 [drop]: https://github.com/rust-lang/rust/pull/24935
3419 Version 1.0.0 (2015-05-15)
3420 ========================
3422 * ~1500 changes, numerous bugfixes
3427 * The vast majority of the standard library is now `#[stable]`. It is
3428 no longer possible to use unstable features with a stable build of
3430 * Many popular crates on [crates.io] now work on the stable release
3432 * Arithmetic on basic integer types now [checks for overflow in debug
3438 * Several [restrictions have been added to trait coherence][coh] in
3439 order to make it easier for upstream authors to change traits
3440 without breaking downstream code.
3441 * Digits of binary and octal literals are [lexed more eagerly][lex] to
3442 improve error messages and macro behavior. For example, `0b1234` is
3443 now lexed as `0b1234` instead of two tokens, `0b1` and `234`.
3444 * Trait bounds [are always invariant][inv], eliminating the need for
3445 the `PhantomFn` and `MarkerTrait` lang items, which have been
3447 * ["-" is no longer a valid character in crate names][cr], the `extern crate
3448 "foo" as bar` syntax has been replaced with `extern crate foo as
3449 bar`, and Cargo now automatically translates "-" in *package* names
3450 to underscore for the crate name.
3451 * [Lifetime shadowing is an error][lt].
3452 * [`Send` no longer implies `'static`][send-rfc].
3453 * [UFCS now supports trait-less associated paths][moar-ufcs] like
3454 `MyType::default()`.
3455 * Primitive types [now have inherent methods][prim-inherent],
3456 obviating the need for extension traits like `SliceExt`.
3457 * Methods with `Self: Sized` in their `where` clause are [considered
3458 object-safe][self-sized], allowing many extension traits like
3459 `IteratorExt` to be merged into the traits they extended.
3460 * You can now [refer to associated types][assoc-where] whose
3461 corresponding trait bounds appear only in a `where` clause.
3462 * The final bits of [OIBIT landed][oibit-final], meaning that traits
3463 like `Send` and `Sync` are now library-defined.
3464 * A [Reflect trait][reflect] was introduced, which means that
3465 downcasting via the `Any` trait is effectively limited to concrete
3466 types. This helps retain the potentially-important "parametricity"
3467 property: generic code cannot behave differently for different type
3468 arguments except in minor ways.
3469 * The `unsafe_destructor` feature is now deprecated in favor of the
3470 [new `dropck`][dropck]. This change is a major reduction in unsafe
3476 * The `thread_local` module [has been renamed to `std::thread`][th].
3477 * The methods of `IteratorExt` [have been moved to the `Iterator`
3479 * Several traits that implement Rust's conventions for type
3480 conversions, `AsMut`, `AsRef`, `From`, and `Into` have been
3481 [centralized in the `std::convert` module][con].
3482 * The `FromError` trait [was removed in favor of `From`][fe].
3483 * The basic sleep function [has moved to
3484 `std::thread::sleep_ms`][slp].
3485 * The `splitn` function now takes an `n` parameter that represents the
3486 number of items yielded by the returned iterator [instead of the
3487 number of 'splits'][spl].
3488 * [On Unix, all file descriptors are `CLOEXEC` by default][clo].
3489 * [Derived implementations of `PartialOrd` now order enums according
3490 to their explicitly-assigned discriminants][po].
3491 * [Methods for searching strings are generic over `Pattern`s][pat],
3492 implemented presently by `&char`, `&str`, `FnMut(char) -> bool` and
3494 * [In method resolution, object methods are resolved before inherent
3496 * [`String::from_str` has been deprecated in favor of the `From` impl,
3497 `String::from`][sf].
3498 * [`io::Error` implements `Sync`][ios].
3499 * [The `words` method on `&str` has been replaced with
3500 `split_whitespace`][sw], to avoid answering the tricky question, 'what is
3502 * The new path and IO modules are complete and `#[stable]`. This
3503 was the major library focus for this cycle.
3504 * The path API was [revised][path-normalize] to normalize `.`,
3505 adjusting the tradeoffs in favor of the most common usage.
3506 * A large number of remaining APIs in `std` were also stabilized
3507 during this cycle; about 75% of the non-deprecated API surface
3509 * The new [string pattern API][string-pattern] landed, which makes
3510 the string slice API much more internally consistent and flexible.
3511 * A new set of [generic conversion traits][conversion] replaced
3512 many existing ad hoc traits.
3513 * Generic numeric traits were [completely removed][num-traits]. This
3514 was made possible thanks to inherent methods for primitive types,
3515 and the removal gives maximal flexibility for designing a numeric
3516 hierarchy in the future.
3517 * The `Fn` traits are now related via [inheritance][fn-inherit]
3518 and provide ergonomic [blanket implementations][fn-blanket].
3519 * The `Index` and `IndexMut` traits were changed to
3520 [take the index by value][index-value], enabling code like
3521 `hash_map["string"]` to work.
3522 * `Copy` now [inherits][copy-clone] from `Clone`, meaning that all
3523 `Copy` data is known to be `Clone` as well.
3528 * Many errors now have extended explanations that can be accessed with
3529 the `--explain` flag to `rustc`.
3530 * Many new examples have been added to the standard library
3532 * rustdoc has received a number of improvements focused on completion
3534 * Metadata was tuned, shrinking binaries [by 27%][metadata-shrink].
3535 * Much headway was made on ecosystem-wide CI, making it possible
3536 to [compare builds for breakage][ci-compare].
3539 [crates.io]: http://crates.io
3540 [clo]: https://github.com/rust-lang/rust/pull/24034
3541 [coh]: https://github.com/rust-lang/rfcs/blob/master/text/1023-rebalancing-coherence.md
3542 [con]: https://github.com/rust-lang/rust/pull/23875
3543 [cr]: https://github.com/rust-lang/rust/pull/23419
3544 [fe]: https://github.com/rust-lang/rust/pull/23879
3545 [ie]: https://github.com/rust-lang/rust/pull/23300
3546 [inv]: https://github.com/rust-lang/rust/pull/23938
3547 [ios]: https://github.com/rust-lang/rust/pull/24133
3548 [lex]: https://github.com/rust-lang/rfcs/blob/master/text/0879-small-base-lexing.md
3549 [lt]: https://github.com/rust-lang/rust/pull/24057
3550 [meth]: https://github.com/rust-lang/rust/pull/24056
3551 [pat]: https://github.com/rust-lang/rfcs/blob/master/text/0528-string-patterns.md
3552 [po]: https://github.com/rust-lang/rust/pull/24270
3553 [sf]: https://github.com/rust-lang/rust/pull/24517
3554 [slp]: https://github.com/rust-lang/rust/pull/23949
3555 [spl]: https://github.com/rust-lang/rfcs/blob/master/text/0979-align-splitn-with-other-languages.md
3556 [sw]: https://github.com/rust-lang/rfcs/blob/master/text/1054-str-words.md
3557 [th]: https://github.com/rust-lang/rfcs/blob/master/text/0909-move-thread-local-to-std-thread.md
3558 [send-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0458-send-improvements.md
3559 [moar-ufcs]: https://github.com/rust-lang/rust/pull/22172
3560 [prim-inherent]: https://github.com/rust-lang/rust/pull/23104
3561 [overflow]: https://github.com/rust-lang/rfcs/blob/master/text/0560-integer-overflow.md
3562 [metadata-shrink]: https://github.com/rust-lang/rust/pull/22971
3563 [self-sized]: https://github.com/rust-lang/rust/pull/22301
3564 [assoc-where]: https://github.com/rust-lang/rust/pull/22512
3565 [string-pattern]: https://github.com/rust-lang/rust/pull/22466
3566 [oibit-final]: https://github.com/rust-lang/rust/pull/21689
3567 [reflect]: https://github.com/rust-lang/rust/pull/23712
3568 [conversion]: https://github.com/rust-lang/rfcs/pull/529
3569 [num-traits]: https://github.com/rust-lang/rust/pull/23549
3570 [index-value]: https://github.com/rust-lang/rust/pull/23601
3571 [dropck]: https://github.com/rust-lang/rfcs/pull/769
3572 [ci-compare]: https://gist.github.com/brson/a30a77836fbec057cbee
3573 [fn-inherit]: https://github.com/rust-lang/rust/pull/23282
3574 [fn-blanket]: https://github.com/rust-lang/rust/pull/23895
3575 [copy-clone]: https://github.com/rust-lang/rust/pull/23860
3576 [path-normalize]: https://github.com/rust-lang/rust/pull/23229
3579 Version 1.0.0-alpha.2 (2015-02-20)
3580 =====================================
3582 * ~1300 changes, numerous bugfixes
3586 * The various I/O modules were [overhauled][io-rfc] to reduce
3587 unnecessary abstractions and provide better interoperation with
3588 the underlying platform. The old `io` module remains temporarily
3590 * The standard library now [participates in feature gating][feat],
3591 so use of unstable libraries now requires a `#![feature(...)]`
3592 attribute. The impact of this change is [described on the
3593 forum][feat-forum]. [RFC][feat-rfc].
3597 * `for` loops [now operate on the `IntoIterator` trait][into],
3598 which eliminates the need to call `.iter()`, etc. to iterate
3599 over collections. There are some new subtleties to remember
3600 though regarding what sort of iterators various types yield, in
3601 particular that `for foo in bar { }` yields values from a move
3602 iterator, destroying the original collection. [RFC][into-rfc].
3603 * Objects now have [default lifetime bounds][obj], so you don't
3604 have to write `Box<Trait+'static>` when you don't care about
3605 storing references. [RFC][obj-rfc].
3606 * In types that implement `Drop`, [lifetimes must outlive the
3607 value][drop]. This will soon make it possible to safely
3608 implement `Drop` for types where `#[unsafe_destructor]` is now
3609 required. Read the [gorgeous RFC][drop-rfc] for details.
3610 * The fully qualified <T as Trait>::X syntax lets you set the Self
3611 type for a trait method or associated type. [RFC][ufcs-rfc].
3612 * References to types that implement `Deref<U>` now [automatically
3613 coerce to references][deref] to the dereferenced type `U`,
3614 e.g. `&T where T: Deref<U>` automatically coerces to `&U`. This
3615 should eliminate many unsightly uses of `&*`, as when converting
3616 from references to vectors into references to
3617 slices. [RFC][deref-rfc].
3618 * The explicit [closure kind syntax][close] (`|&:|`, `|&mut:|`,
3619 `|:|`) is obsolete and closure kind is inferred from context.
3620 * [`Self` is a keyword][Self].
3624 * The `Show` and `String` formatting traits [have been
3625 renamed][fmt] to `Debug` and `Display` to more clearly reflect
3626 their related purposes. Automatically getting a string
3627 conversion to use with `format!("{:?}", something_to_debug)` is
3628 now written `#[derive(Debug)]`.
3629 * Abstract [OS-specific string types][osstr], `std::ff::{OsString,
3630 OsStr}`, provide strings in platform-specific encodings for easier
3631 interop with system APIs. [RFC][osstr-rfc].
3632 * The `boxed::into_raw` and `Box::from_raw` functions [convert
3633 between `Box<T>` and `*mut T`][boxraw], a common pattern for
3634 creating raw pointers.
3638 * Certain long error messages of the form 'expected foo found bar'
3639 are now [split neatly across multiple
3640 lines][multiline]. Examples in the PR.
3641 * On Unix Rust can be [uninstalled][un] by running
3642 `/usr/local/lib/rustlib/uninstall.sh`.
3643 * The `#[rustc_on_unimplemented]` attribute, requiring the
3644 'on_unimplemented' feature, lets rustc [display custom error
3645 messages when a trait is expected to be implemented for a type
3650 * Rust is tested against a [LALR grammar][lalr], which parses
3651 almost all the Rust files that rustc does.
3653 [boxraw]: https://github.com/rust-lang/rust/pull/21318
3654 [close]: https://github.com/rust-lang/rust/pull/21843
3655 [deref]: https://github.com/rust-lang/rust/pull/21351
3656 [deref-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0241-deref-conversions.md
3657 [drop]: https://github.com/rust-lang/rust/pull/21972
3658 [drop-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
3659 [feat]: https://github.com/rust-lang/rust/pull/21248
3660 [feat-forum]: https://users.rust-lang.org/t/psa-important-info-about-rustcs-new-feature-staging/82/5
3661 [feat-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0507-release-channels.md
3662 [fmt]: https://github.com/rust-lang/rust/pull/21457
3663 [into]: https://github.com/rust-lang/rust/pull/20790
3664 [into-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md#intoiterator-and-iterable
3665 [io-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
3666 [lalr]: https://github.com/rust-lang/rust/pull/21452
3667 [multiline]: https://github.com/rust-lang/rust/pull/19870
3668 [obj]: https://github.com/rust-lang/rust/pull/22230
3669 [obj-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0599-default-object-bound.md
3670 [onun]: https://github.com/rust-lang/rust/pull/20889
3671 [osstr]: https://github.com/rust-lang/rust/pull/21488
3672 [osstr-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
3673 [Self]: https://github.com/rust-lang/rust/pull/22158
3674 [ufcs-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0132-ufcs.md
3675 [un]: https://github.com/rust-lang/rust/pull/22256
3678 Version 1.0.0-alpha (2015-01-09)
3679 ==================================
3681 * ~2400 changes, numerous bugfixes
3685 * The language itself is considered feature complete for 1.0,
3686 though there will be many usability improvements and bugfixes
3687 before the final release.
3688 * Nearly 50% of the public API surface of the standard library has
3689 been declared 'stable'. Those interfaces are unlikely to change
3691 * The long-running debate over integer types has been
3692 [settled][ints]: Rust will ship with types named `isize` and
3693 `usize`, rather than `int` and `uint`, for pointer-sized
3694 integers. Guidelines will be rolled out during the alpha cycle.
3695 * Most crates that are not `std` have been moved out of the Rust
3696 distribution into the Cargo ecosystem so they can evolve
3697 separately and don't need to be stabilized as quickly, including
3698 'time', 'getopts', 'num', 'regex', and 'term'.
3699 * Documentation continues to be expanded with more API coverage, more
3700 examples, and more in-depth explanations. The guides have been
3701 consolidated into [The Rust Programming Language][trpl].
3702 * "[Rust By Example][rbe]" is now maintained by the Rust team.
3703 * All official Rust binary installers now come with [Cargo], the
3704 Rust package manager.
3708 * Closures have been [completely redesigned][unboxed] to be
3709 implemented in terms of traits, can now be used as generic type
3710 bounds and thus monomorphized and inlined, or via an opaque
3711 pointer (boxed) as in the old system. The new system is often
3712 referred to as 'unboxed' closures.
3713 * Traits now support [associated types][assoc], allowing families
3714 of related types to be defined together and used generically in
3716 * Enum variants are [namespaced by their type names][enum].
3717 * [`where` clauses][where] provide a more versatile and attractive
3718 syntax for specifying generic bounds, though the previous syntax
3720 * Rust again picks a [fallback][fb] (either i32 or f64) for uninferred
3722 * Rust [no longer has a runtime][rt] of any description, and only
3723 supports OS threads, not green threads.
3724 * At long last, Rust has been overhauled for 'dynamically-sized
3725 types' ([DST]), which integrates 'fat pointers' (object types,
3726 arrays, and `str`) more deeply into the type system, making it
3728 * Rust now has a general [range syntax][range], `i..j`, `i..`, and
3729 `..j` that produce range types and which, when combined with the
3730 `Index` operator and multidispatch, leads to a convenient slice
3732 * The new range syntax revealed an ambiguity in the fixed-length
3733 array syntax, so now fixed length arrays [are written `[T;
3735 * The `Copy` trait is no longer implemented automatically. Unsafe
3736 pointers no longer implement `Sync` and `Send` so types
3737 containing them don't automatically either. `Sync` and `Send`
3738 are now 'unsafe traits' so one can "forcibly" implement them via
3739 `unsafe impl` if a type confirms to the requirements for them
3740 even though the internals do not (e.g. structs containing unsafe
3741 pointers like `Arc`). These changes are intended to prevent some
3742 footguns and are collectively known as [opt-in built-in
3743 traits][oibit] (though `Sync` and `Send` will soon become pure
3744 library types unknown to the compiler).
3745 * Operator traits now take their operands [by value][ops], and
3746 comparison traits can use multidispatch to compare one type
3747 against multiple other types, allowing e.g. `String` to be
3748 compared with `&str`.
3749 * `if let` and `while let` are no longer feature-gated.
3750 * Rust has adopted a more [uniform syntax for escaping unicode
3751 characters][unicode].
3752 * `macro_rules!` [has been declared stable][mac]. Though it is a
3753 flawed system it is sufficiently popular that it must be usable
3754 for 1.0. Effort has gone into [future-proofing][mac-future] it
3755 in ways that will allow other macro systems to be developed in
3756 parallel, and won't otherwise impact the evolution of the
3758 * The prelude has been [pared back significantly][prelude] such
3759 that it is the minimum necessary to support the most pervasive
3760 code patterns, and through [generalized where clauses][where]
3761 many of the prelude extension traits have been consolidated.
3762 * Rust's rudimentary reflection [has been removed][refl], as it
3763 incurred too much code generation for little benefit.
3764 * [Struct variants][structvars] are no longer feature-gated.
3765 * Trait bounds can be [polymorphic over lifetimes][hrtb]. Also
3766 known as 'higher-ranked trait bounds', this crucially allows
3767 unboxed closures to work.
3768 * Macros invocations surrounded by parens or square brackets and
3769 not terminated by a semicolon are [parsed as
3770 expressions][macros], which makes expressions like `vec![1i32,
3771 2, 3].len()` work as expected.
3772 * Trait objects now implement their traits automatically, and
3773 traits that can be coerced to objects now must be [object
3775 * Automatically deriving traits is now done with `#[derive(...)]`
3776 not `#[deriving(...)]` for [consistency with other naming
3777 conventions][derive].
3778 * Importing the containing module or enum at the same time as
3779 items or variants they contain is [now done with `self` instead
3780 of `mod`][self], as in use `foo::{self, bar}`
3781 * Glob imports are no longer feature-gated.
3782 * The `box` operator and `box` patterns have been feature-gated
3783 pending a redesign. For now unique boxes should be allocated
3784 like other containers, with `Box::new`.
3788 * A [series][coll1] of [efforts][coll2] to establish
3789 [conventions][coll3] for collections types has resulted in API
3790 improvements throughout the standard library.
3791 * New [APIs for error handling][err] provide ergonomic interop
3792 between error types, and [new conventions][err-conv] describe
3793 more clearly the recommended error handling strategies in Rust.
3794 * The `fail!` macro has been renamed to [`panic!`][panic] so that
3795 it is easier to discuss failure in the context of error handling
3796 without making clarifications as to whether you are referring to
3797 the 'fail' macro or failure more generally.
3798 * On Linux, `OsRng` prefers the new, more reliable `getrandom`
3799 syscall when available.
3800 * The 'serialize' crate has been renamed 'rustc-serialize' and
3801 moved out of the distribution to Cargo. Although it is widely
3802 used now, it is expected to be superseded in the near future.
3803 * The `Show` formatter, typically implemented with
3804 `#[derive(Show)]` is [now requested with the `{:?}`
3805 specifier][show] and is intended for use by all types, for uses
3806 such as `println!` debugging. The new `String` formatter must be
3807 implemented by hand, uses the `{}` specifier, and is intended
3808 for full-fidelity conversions of things that can logically be
3809 represented as strings.
3813 * [Flexible target specification][flex] allows rustc's code
3814 generation to be configured to support otherwise-unsupported
3816 * Rust comes with rust-gdb and rust-lldb scripts that launch their
3817 respective debuggers with Rust-appropriate pretty-printing.
3818 * The Windows installation of Rust is distributed with the
3819 MinGW components currently required to link binaries on that
3824 * Nullable enum optimizations have been extended to more types so
3825 that e.g. `Option<Vec<T>>` and `Option<String>` take up no more
3826 space than the inner types themselves.
3827 * Work has begun on supporting AArch64.
3829 [Cargo]: https://crates.io
3830 [unboxed]: http://smallcultfollowing.com/babysteps/blog/2014/11/26/purging-proc/
3831 [enum]: https://github.com/rust-lang/rfcs/blob/master/text/0390-enum-namespacing.md
3832 [flex]: https://github.com/rust-lang/rfcs/blob/master/text/0131-target-specification.md
3833 [err]: https://github.com/rust-lang/rfcs/blob/master/text/0201-error-chaining.md
3834 [err-conv]: https://github.com/rust-lang/rfcs/blob/master/text/0236-error-conventions.md
3835 [rt]: https://github.com/rust-lang/rfcs/blob/master/text/0230-remove-runtime.md
3836 [mac]: https://github.com/rust-lang/rfcs/blob/master/text/0453-macro-reform.md
3837 [mac-future]: https://github.com/rust-lang/rfcs/pull/550
3838 [DST]: http://smallcultfollowing.com/babysteps/blog/2014/01/05/dst-take-5/
3839 [coll1]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md
3840 [coll2]: https://github.com/rust-lang/rfcs/blob/master/text/0509-collections-reform-part-2.md
3841 [coll3]: https://github.com/rust-lang/rfcs/blob/master/text/0216-collection-views.md
3842 [ops]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md
3843 [prelude]: https://github.com/rust-lang/rfcs/blob/master/text/0503-prelude-stabilization.md
3844 [where]: https://github.com/rust-lang/rfcs/blob/master/text/0135-where.md
3845 [refl]: https://github.com/rust-lang/rfcs/blob/master/text/0379-remove-reflection.md
3846 [panic]: https://github.com/rust-lang/rfcs/blob/master/text/0221-panic.md
3847 [structvars]: https://github.com/rust-lang/rfcs/blob/master/text/0418-struct-variants.md
3848 [hrtb]: https://github.com/rust-lang/rfcs/blob/master/text/0387-higher-ranked-trait-bounds.md
3849 [unicode]: https://github.com/rust-lang/rfcs/blob/master/text/0446-es6-unicode-escapes.md
3850 [oibit]: https://github.com/rust-lang/rfcs/blob/master/text/0019-opt-in-builtin-traits.md
3851 [macros]: https://github.com/rust-lang/rfcs/blob/master/text/0378-expr-macros.md
3852 [range]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md#indexing-and-slicing
3853 [arrays]: https://github.com/rust-lang/rfcs/blob/master/text/0520-new-array-repeat-syntax.md
3854 [show]: https://github.com/rust-lang/rfcs/blob/master/text/0504-show-stabilization.md
3855 [derive]: https://github.com/rust-lang/rfcs/blob/master/text/0534-deriving2derive.md
3856 [self]: https://github.com/rust-lang/rfcs/blob/master/text/0532-self-in-use.md
3857 [fb]: https://github.com/rust-lang/rfcs/blob/master/text/0212-restore-int-fallback.md
3858 [objsafe]: https://github.com/rust-lang/rfcs/blob/master/text/0255-object-safety.md
3859 [assoc]: https://github.com/rust-lang/rfcs/blob/master/text/0195-associated-items.md
3860 [ints]: https://github.com/rust-lang/rfcs/pull/544#issuecomment-68760871
3861 [trpl]: https://doc.rust-lang.org/book/index.html
3862 [rbe]: http://rustbyexample.com/
3865 Version 0.12.0 (2014-10-09)
3866 =============================
3868 * ~1900 changes, numerous bugfixes
3872 * The introductory documentation (now called The Rust Guide) has
3873 been completely rewritten, as have a number of supplementary
3875 * Rust's package manager, Cargo, continues to improve and is
3876 sometimes considered to be quite awesome.
3877 * Many API's in `std` have been reviewed and updated for
3878 consistency with the in-development Rust coding
3879 guidelines. The standard library documentation tracks
3880 stabilization progress.
3881 * Minor libraries have been moved out-of-tree to the rust-lang org
3882 on GitHub: uuid, semver, glob, num, hexfloat, fourcc. They can
3883 be installed with Cargo.
3884 * Lifetime elision allows lifetime annotations to be left off of
3885 function declarations in many common scenarios.
3886 * Rust now works on 64-bit Windows.
3889 * Indexing can be overloaded with the `Index` and `IndexMut`
3891 * The `if let` construct takes a branch only if the `let` pattern
3892 matches, currently behind the 'if_let' feature gate.
3893 * 'where clauses', a more flexible syntax for specifying trait
3894 bounds that is more aesthetic, have been added for traits and
3895 free functions. Where clauses will in the future make it
3896 possible to constrain associated types, which would be
3897 impossible with the existing syntax.
3898 * A new slicing syntax (e.g. `[0..4]`) has been introduced behind
3899 the 'slicing_syntax' feature gate, and can be overloaded with
3900 the `Slice` or `SliceMut` traits.
3901 * The syntax for matching of sub-slices has been changed to use a
3902 postfix `..` instead of prefix (.e.g. `[a, b, c..]`), for
3903 consistency with other uses of `..` and to future-proof
3904 potential additional uses of the syntax.
3905 * The syntax for matching inclusive ranges in patterns has changed
3906 from `0..3` to `0...4` to be consistent with the exclusive range
3908 * Matching of sub-slices in non-tail positions (e.g. `[a.., b,
3909 c]`) has been put behind the 'advanced_slice_patterns' feature
3910 gate and may be removed in the future.
3911 * Components of tuples and tuple structs can be extracted using
3912 the `value.0` syntax, currently behind the `tuple_indexing`
3914 * The `#[crate_id]` attribute is no longer supported; versioning
3915 is handled by the package manager.
3916 * Renaming crate imports are now written `extern crate foo as bar`
3917 instead of `extern crate bar = foo`.
3918 * Renaming use statements are now written `use foo as bar` instead
3920 * `let` and `match` bindings and argument names in macros are now
3922 * The new, more efficient, closure types ('unboxed closures') have
3923 been added under a feature gate, 'unboxed_closures'. These will
3924 soon replace the existing closure types, once higher-ranked
3925 trait lifetimes are added to the language.
3926 * `move` has been added as a keyword, for indicating closures
3927 that capture by value.
3928 * Mutation and assignment is no longer allowed in pattern guards.
3929 * Generic structs and enums can now have trait bounds.
3930 * The `Share` trait is now called `Sync` to free up the term
3931 'shared' to refer to 'shared reference' (the default reference
3933 * Dynamically-sized types have been mostly implemented,
3934 unifying the behavior of fat-pointer types with the rest of the
3936 * As part of dynamically-sized types, the `Sized` trait has been
3937 introduced, which qualifying types implement by default, and
3938 which type parameters expect by default. To specify that a type
3939 parameter does not need to be sized, write `<Sized? T>`. Most
3940 types are `Sized`, notable exceptions being unsized arrays
3941 (`[T]`) and trait types.
3942 * Closures can return `!`, as in `|| -> !` or `proc() -> !`.
3943 * Lifetime bounds can now be applied to type parameters and object
3945 * The old, reference counted GC type, `Gc<T>` which was once
3946 denoted by the `@` sigil, has finally been removed. GC will be
3947 revisited in the future.
3950 * Library documentation has been improved for a number of modules.
3951 * Bit-vectors, collections::bitv has been modernized.
3952 * The url crate is deprecated in favor of
3953 http://github.com/servo/rust-url, which can be installed with
3955 * Most I/O stream types can be cloned and subsequently closed from
3957 * A `std::time::Duration` type has been added for use in I/O
3958 methods that rely on timers, as well as in the 'time' crate's
3959 `Timespec` arithmetic.
3960 * The runtime I/O abstraction layer that enabled the green thread
3961 scheduler to do non-thread-blocking I/O has been removed, along
3962 with the libuv-based implementation employed by the green thread
3963 scheduler. This will greatly simplify the future I/O work.
3964 * `collections::btree` has been rewritten to have a more
3965 idiomatic and efficient design.
3968 * rustdoc output now indicates the stability levels of API's.
3969 * The `--crate-name` flag can specify the name of the crate
3970 being compiled, like `#[crate_name]`.
3971 * The `-C metadata` specifies additional metadata to hash into
3972 symbol names, and `-C extra-filename` specifies additional
3973 information to put into the output filename, for use by the
3974 package manager for versioning.
3975 * debug info generation has continued to improve and should be
3976 more reliable under both gdb and lldb.
3977 * rustc has experimental support for compiling in parallel
3978 using the `-C codegen-units` flag.
3979 * rustc no longer encodes rpath information into binaries by
3983 * Stack usage has been optimized with LLVM lifetime annotations.
3984 * Official Rust binaries on Linux are more compatible with older
3985 kernels and distributions, built on CentOS 5.10.
3988 Version 0.11.0 (2014-07-02)
3989 ==========================
3991 * ~1700 changes, numerous bugfixes
3994 * ~[T] has been removed from the language. This type is superseded by
3996 * ~str has been removed from the language. This type is superseded by
3998 * ~T has been removed from the language. This type is superseded by the
4000 * @T has been removed from the language. This type is superseded by the
4001 standard library's std::gc::Gc<T> type.
4002 * Struct fields are now all private by default.
4003 * Vector indices and shift amounts are both required to be a `uint`
4004 instead of any integral type.
4005 * Byte character, byte string, and raw byte string literals are now all
4006 supported by prefixing the normal literal with a `b`.
4007 * Multiple ABIs are no longer allowed in an ABI string
4008 * The syntax for lifetimes on closures/procedures has been tweaked
4009 slightly: `<'a>|A, B|: 'b + K -> T`
4010 * Floating point modulus has been removed from the language; however it
4011 is still provided by a library implementation.
4012 * Private enum variants are now disallowed.
4013 * The `priv` keyword has been removed from the language.
4014 * A closure can no longer be invoked through a &-pointer.
4015 * The `use foo, bar, baz;` syntax has been removed from the language.
4016 * The transmute intrinsic no longer works on type parameters.
4017 * Statics now allow blocks/items in their definition.
4018 * Trait bounds are separated from objects with + instead of : now.
4019 * Objects can no longer be read while they are mutably borrowed.
4020 * The address of a static is now marked as insignificant unless the
4021 #[inline(never)] attribute is placed it.
4022 * The #[unsafe_destructor] attribute is now behind a feature gate.
4023 * Struct literals are no longer allowed in ambiguous positions such as
4024 if, while, match, and for..in.
4025 * Declaration of lang items and intrinsics are now feature-gated by
4027 * Integral literals no longer default to `int`, and floating point
4028 literals no longer default to `f64`. Literals must be suffixed with an
4029 appropriate type if inference cannot determine the type of the
4031 * The Box<T> type is no longer implicitly borrowed to &mut T.
4032 * Procedures are now required to not capture borrowed references.
4035 * The standard library is now a "facade" over a number of underlying
4036 libraries. This means that development on the standard library should
4037 be speeder due to smaller crates, as well as a clearer line between
4039 * A new library, libcore, lives under the standard library's facade
4040 which is Rust's "0-assumption" library, suitable for embedded and
4041 kernel development for example.
4042 * A regex crate has been added to the standard distribution. This crate
4043 includes statically compiled regular expressions.
4044 * The unwrap/unwrap_err methods on Result require a Show bound for
4045 better error messages.
4046 * The return types of the std::comm primitives have been centralized
4047 around the Result type.
4048 * A number of I/O primitives have gained the ability to time out their
4050 * A number of I/O primitives have gained the ability to close their
4051 reading/writing halves to cancel pending operations.
4052 * Reverse iterator methods have been removed in favor of `rev()` on
4053 their forward-iteration counterparts.
4054 * A bitflags! macro has been added to enable easy interop with C and
4055 management of bit flags.
4056 * A debug_assert! macro is now provided which is disabled when
4057 `--cfg ndebug` is passed to the compiler.
4058 * A graphviz crate has been added for creating .dot files.
4059 * The std::cast module has been migrated into std::mem.
4060 * The std::local_data api has been migrated from freestanding functions
4061 to being based on methods.
4062 * The Pod trait has been renamed to Copy.
4063 * jemalloc has been added as the default allocator for types.
4064 * The API for allocating memory has been changed to use proper alignment
4065 and sized deallocation
4066 * Connecting a TcpStream or binding a TcpListener is now based on a
4067 string address and a u16 port. This allows connecting to a hostname as
4069 * The Reader trait now contains a core method, read_at_least(), which
4070 correctly handles many repeated 0-length reads.
4071 * The process-spawning API is now centered around a builder-style
4073 * The :? printing qualifier has been moved from the standard library to
4074 an external libdebug crate.
4075 * Eq/Ord have been renamed to PartialEq/PartialOrd. TotalEq/TotalOrd
4076 have been renamed to Eq/Ord.
4077 * The select/plural methods have been removed from format!. The escapes
4078 for { and } have also changed from \{ and \} to {{ and }},
4080 * The TaskBuilder API has been re-worked to be a true builder, and
4081 extension traits for spawning native/green tasks have been added.
4084 * All breaking changes to the language or libraries now have their
4085 commit message annotated with `[breaking-change]` to allow for easy
4086 discovery of breaking changes.
4087 * The compiler will now try to suggest how to annotate lifetimes if a
4088 lifetime-related error occurs.
4089 * Debug info continues to be improved greatly with general bug fixes and
4090 better support for situations like link time optimization (LTO).
4091 * Usage of syntax extensions when cross-compiling has been fixed.
4092 * Functionality equivalent to GCC & Clang's -ffunction-sections,
4093 -fdata-sections and --gc-sections has been enabled by default
4094 * The compiler is now stricter about where it will load module files
4095 from when a module is declared via `mod foo;`.
4096 * The #[phase(syntax)] attribute has been renamed to #[phase(plugin)].
4097 Syntax extensions are now discovered via a "plugin registrar" type
4098 which will be extended in the future to other various plugins.
4099 * Lints have been restructured to allow for dynamically loadable lints.
4100 * A number of rustdoc improvements:
4101 * The HTML output has been visually redesigned.
4102 * Markdown is now powered by hoedown instead of sundown.
4103 * Searching heuristics have been greatly improved.
4104 * The search index has been reduced in size by a great amount.
4105 * Cross-crate documentation via `pub use` has been greatly improved.
4106 * Primitive types are now hyperlinked and documented.
4107 * Documentation has been moved from static.rust-lang.org/doc to
4109 * A new sandbox, play.rust-lang.org, is available for running and
4110 sharing rust code examples on-line.
4111 * Unused attributes are now more robustly warned about.
4112 * The dead_code lint now warns about unused struct fields.
4113 * Cross-compiling to iOS is now supported.
4114 * Cross-compiling to mipsel is now supported.
4115 * Stability attributes are now inherited by default and no longer apply
4116 to intra-crate usage, only inter-crate usage.
4117 * Error message related to non-exhaustive match expressions have been
4121 Version 0.10 (2014-04-03)
4122 =========================
4124 * ~1500 changes, numerous bugfixes
4127 * A new RFC process is now in place for modifying the language.
4128 * Patterns with `@`-pointers have been removed from the language.
4129 * Patterns with unique vectors (`~[T]`) have been removed from the
4131 * Patterns with unique strings (`~str`) have been removed from the
4133 * `@str` has been removed from the language.
4134 * `@[T]` has been removed from the language.
4135 * `@self` has been removed from the language.
4136 * `@Trait` has been removed from the language.
4137 * Headers on `~` allocations which contain `@` boxes inside the type for
4138 reference counting have been removed.
4139 * The semantics around the lifetimes of temporary expressions have changed,
4140 see #3511 and #11585 for more information.
4141 * Cross-crate syntax extensions are now possible, but feature gated. See
4142 #11151 for more information. This includes both `macro_rules!` macros as
4143 well as syntax extensions such as `format!`.
4144 * New lint modes have been added, and older ones have been turned on to be
4146 * Unnecessary parentheses
4149 * Uppercase variables
4150 * Publicly visible private types
4151 * `#[deriving]` with raw pointers
4152 * Unsafe functions can no longer be coerced to closures.
4153 * Various obscure macros such as `log_syntax!` are now behind feature gates.
4154 * The `#[simd]` attribute is now behind a feature gate.
4155 * Visibility is no longer allowed on `extern crate` statements, and
4156 unnecessary visibility (`priv`) is no longer allowed on `use` statements.
4157 * Trailing commas are now allowed in argument lists and tuple patterns.
4158 * The `do` keyword has been removed, it is now a reserved keyword.
4159 * Default type parameters have been implemented, but are feature gated.
4160 * Borrowed variables through captures in closures are now considered soundly.
4161 * `extern mod` is now `extern crate`
4162 * The `Freeze` trait has been removed.
4163 * The `Share` trait has been added for types that can be shared among
4165 * Labels in macros are now hygienic.
4166 * Expression/statement macro invocations can be delimited with `{}` now.
4167 * Treatment of types allowed in `static mut` locations has been tweaked.
4168 * The `*` and `.` operators are now overloadable through the `Deref` and
4170 * `~Trait` and `proc` no longer have `Send` bounds by default.
4171 * Partial type hints are now supported with the `_` type marker.
4172 * An `Unsafe` type was introduced for interior mutability. It is now
4173 considered undefined to transmute from `&T` to `&mut T` without using the
4175 * The #[linkage] attribute was implemented for extern statics/functions.
4176 * The inner attribute syntax has changed from `#[foo];` to `#![foo]`.
4177 * `Pod` was renamed to `Copy`.
4180 * The `libextra` library has been removed. It has now been decomposed into
4181 component libraries with smaller and more focused nuggets of
4182 functionality. The full list of libraries can be found on the
4183 documentation index page.
4184 * std: `std::condition` has been removed. All I/O errors are now propagated
4185 through the `Result` type. In order to assist with error handling, a
4186 `try!` macro for unwrapping errors with an early return and a lint for
4187 unused results has been added. See #12039 for more information.
4188 * std: The `vec` module has been renamed to `slice`.
4189 * std: A new vector type, `Vec<T>`, has been added in preparation for DST.
4190 This will become the only growable vector in the future.
4191 * std: `std::io` now has more public-reexports. Types such as `BufferedReader`
4192 are now found at `std::io::BufferedReader` instead of
4193 `std::io::buffered::BufferedReader`.
4194 * std: `print` and `println` are no longer in the prelude, the `print!` and
4195 `println!` macros are intended to be used instead.
4196 * std: `Rc` now has a `Weak` pointer for breaking cycles, and it no longer
4197 attempts to statically prevent cycles.
4198 * std: The standard distribution is adopting the policy of pushing failure
4199 to the user rather than failing in libraries. Many functions (such as
4200 `slice::last()`) now return `Option<T>` instead of `T` + failing.
4201 * std: `fmt::Default` has been renamed to `fmt::Show`, and it now has a new
4202 deriving mode: `#[deriving(Show)]`.
4203 * std: `ToStr` is now implemented for all types implementing `Show`.
4204 * std: The formatting trait methods now take `&self` instead of `&T`
4205 * std: The `invert()` method on iterators has been renamed to `rev()`
4206 * std: `std::num` has seen a reduction in the genericity of its traits,
4207 consolidating functionality into a few core traits.
4208 * std: Backtraces are now printed on task failure if the environment
4209 variable `RUST_BACKTRACE` is present.
4210 * std: Naming conventions for iterators have been standardized. More details
4211 can be found on the wiki's style guide.
4212 * std: `eof()` has been removed from the `Reader` trait. Specific types may
4213 still implement the function.
4214 * std: Networking types are now cloneable to allow simultaneous reads/writes.
4215 * std: `assert_approx_eq!` has been removed
4216 * std: The `e` and `E` formatting specifiers for floats have been added to
4217 print them in exponential notation.
4218 * std: The `Times` trait has been removed
4219 * std: Indications of variance and opting out of builtin bounds is done
4220 through marker types in `std::kinds::marker` now
4221 * std: `hash` has been rewritten, `IterBytes` has been removed, and
4222 `#[deriving(Hash)]` is now possible.
4223 * std: `SharedChan` has been removed, `Sender` is now cloneable.
4224 * std: `Chan` and `Port` were renamed to `Sender` and `Receiver`.
4225 * std: `Chan::new` is now `channel()`.
4226 * std: A new synchronous channel type has been implemented.
4227 * std: A `select!` macro is now provided for selecting over `Receiver`s.
4228 * std: `hashmap` and `trie` have been moved to `libcollections`
4229 * std: `run` has been rolled into `io::process`
4230 * std: `assert_eq!` now uses `{}` instead of `{:?}`
4231 * std: The equality and comparison traits have seen some reorganization.
4232 * std: `rand` has moved to `librand`.
4233 * std: `to_{lower,upper}case` has been implemented for `char`.
4234 * std: Logging has been moved to `liblog`.
4235 * collections: `HashMap` has been rewritten for higher performance and less
4237 * native: The default runtime is now `libnative`. If `libgreen` is desired,
4238 it can be booted manually. The runtime guide has more information and
4240 * native: All I/O functionality except signals has been implemented.
4241 * green: Task spawning with `libgreen` has been optimized with stack caching
4242 and various trimming of code.
4243 * green: Tasks spawned by `libgreen` now have an unmapped guard page.
4244 * sync: The `extra::sync` module has been updated to modern rust (and moved
4245 to the `sync` library), tweaking and improving various interfaces while
4246 dropping redundant functionality.
4247 * sync: A new `Barrier` type has been added to the `sync` library.
4248 * sync: An efficient mutex for native and green tasks has been implemented.
4249 * serialize: The `base64` module has seen some improvement. It treats
4250 newlines better, has non-string error values, and has seen general
4252 * fourcc: A `fourcc!` macro was introduced
4253 * hexfloat: A `hexfloat!` macro was implemented for specifying floats via a
4254 hexadecimal literal.
4257 * `rustpkg` has been deprecated and removed from the main repository. Its
4258 replacement, `cargo`, is under development.
4259 * Nightly builds of rust are now available
4260 * The memory usage of rustc has been improved many times throughout this
4262 * The build process supports disabling rpath support for the rustc binary
4264 * Code generation has improved in some cases, giving more information to the
4265 LLVM optimization passes to enable more extensive optimizations.
4266 * Debuginfo compatibility with lldb on OSX has been restored.
4267 * The master branch is now gated on an android bot, making building for
4268 android much more reliable.
4269 * Output flags have been centralized into one `--emit` flag.
4270 * Crate type flags have been centralized into one `--crate-type` flag.
4271 * Codegen flags have been consolidated behind a `-C` flag.
4272 * Linking against outdated crates now has improved error messages.
4273 * Error messages with lifetimes will often suggest how to annotate the
4274 function to fix the error.
4275 * Many more types are documented in the standard library, and new guides
4277 * Many `rustdoc` improvements:
4278 * code blocks are syntax highlighted.
4279 * render standalone markdown files.
4280 * the --test flag tests all code blocks by default.
4281 * exported macros are displayed.
4282 * reexported types have their documentation inlined at the location of the
4284 * search works across crates that have been rendered to the same output
4288 Version 0.9 (2014-01-09)
4289 ==========================
4291 * ~1800 changes, numerous bugfixes
4294 * The `float` type has been removed. Use `f32` or `f64` instead.
4295 * A new facility for enabling experimental features (feature gating) has
4296 been added, using the crate-level `#[feature(foo)]` attribute.
4297 * Managed boxes (@) are now behind a feature gate
4298 (`#[feature(managed_boxes)]`) in preparation for future removal. Use the
4299 standard library's `Gc` or `Rc` types instead.
4300 * `@mut` has been removed. Use `std::cell::{Cell, RefCell}` instead.
4301 * Jumping back to the top of a loop is now done with `continue` instead of
4303 * Strings can no longer be mutated through index assignment.
4304 * Raw strings can be created via the basic `r"foo"` syntax or with matched
4305 hash delimiters, as in `r###"foo"###`.
4306 * `~fn` is now written `proc (args) -> retval { ... }` and may only be
4308 * The `&fn` type is now written `|args| -> ret` to match the literal form.
4309 * `@fn`s have been removed.
4310 * `do` only works with procs in order to make it obvious what the cost
4312 * Single-element tuple-like structs can no longer be dereferenced to
4313 obtain the inner value. A more comprehensive solution for overloading
4314 the dereference operator will be provided in the future.
4315 * The `#[link(...)]` attribute has been replaced with
4316 `#[crate_id = "name#vers"]`.
4317 * Empty `impl`s must be terminated with empty braces and may not be
4318 terminated with a semicolon.
4319 * Keywords are no longer allowed as lifetime names; the `self` lifetime
4320 no longer has any special meaning.
4321 * The old `fmt!` string formatting macro has been removed.
4322 * `printf!` and `printfln!` (old-style formatting) removed in favor of
4323 `print!` and `println!`.
4324 * `mut` works in patterns now, as in `let (mut x, y) = (1, 2);`.
4325 * The `extern mod foo (name = "bar")` syntax has been removed. Use
4326 `extern mod foo = "bar"` instead.
4327 * New reserved keywords: `alignof`, `offsetof`, `sizeof`.
4328 * Macros can have attributes.
4329 * Macros can expand to items with attributes.
4330 * Macros can expand to multiple items.
4331 * The `asm!` macro is feature-gated (`#[feature(asm)]`).
4332 * Comments may be nested.
4333 * Values automatically coerce to trait objects they implement, without
4335 * Enum discriminants are no longer an entire word but as small as needed to
4336 contain all the variants. The `repr` attribute can be used to override
4337 the discriminant size, as in `#[repr(int)]` for integer-sized, and
4338 `#[repr(C)]` to match C enums.
4339 * Non-string literals are not allowed in attributes (they never worked).
4340 * The FFI now supports variadic functions.
4341 * Octal numeric literals, as in `0o7777`.
4342 * The `concat!` syntax extension performs compile-time string concatenation.
4343 * The `#[fixed_stack_segment]` and `#[rust_stack]` attributes have been
4344 removed as Rust no longer uses segmented stacks.
4345 * Non-ascii identifiers are feature-gated (`#[feature(non_ascii_idents)]`).
4346 * Ignoring all fields of an enum variant or tuple-struct is done with `..`,
4347 not `*`; ignoring remaining fields of a struct is also done with `..`,
4348 not `_`; ignoring a slice of a vector is done with `..`, not `.._`.
4349 * `rustc` supports the "win64" calling convention via `extern "win64"`.
4350 * `rustc` supports the "system" calling convention, which defaults to the
4351 preferred convention for the target platform, "stdcall" on 32-bit Windows,
4353 * The `type_overflow` lint (default: warn) checks literals for overflow.
4354 * The `unsafe_block` lint (default: allow) checks for usage of `unsafe`.
4355 * The `attribute_usage` lint (default: warn) warns about unknown
4357 * The `unknown_features` lint (default: warn) warns about unknown
4359 * The `dead_code` lint (default: warn) checks for dead code.
4360 * Rust libraries can be linked statically to one another
4361 * `#[link_args]` is behind the `link_args` feature gate.
4362 * Native libraries are now linked with `#[link(name = "foo")]`
4363 * Native libraries can be statically linked to a rust crate
4364 (`#[link(name = "foo", kind = "static")]`).
4365 * Native OS X frameworks are now officially supported
4366 (`#[link(name = "foo", kind = "framework")]`).
4367 * The `#[thread_local]` attribute creates thread-local (not task-local)
4368 variables. Currently behind the `thread_local` feature gate.
4369 * The `return` keyword may be used in closures.
4370 * Types that can be copied via a memcpy implement the `Pod` kind.
4371 * The `cfg` attribute can now be used on struct fields and enum variants.
4374 * std: The `option` and `result` API's have been overhauled to make them
4375 simpler, more consistent, and more composable.
4376 * std: The entire `std::io` module has been replaced with one that is
4377 more comprehensive and that properly interfaces with the underlying
4378 scheduler. File, TCP, UDP, Unix sockets, pipes, and timers are all
4380 * std: `io::util` contains a number of useful implementations of
4381 `Reader` and `Writer`, including `NullReader`, `NullWriter`,
4382 `ZeroReader`, `TeeReader`.
4383 * std: The reference counted pointer type `extra::rc` moved into std.
4384 * std: The `Gc` type in the `gc` module will replace `@` (it is currently
4385 just a wrapper around it).
4386 * std: The `Either` type has been removed.
4387 * std: `fmt::Default` can be implemented for any type to provide default
4388 formatting to the `format!` macro, as in `format!("{}", myfoo)`.
4389 * std: The `rand` API continues to be tweaked.
4390 * std: The `rust_begin_unwind` function, useful for inserting breakpoints
4391 on failure in gdb, is now named `rust_fail`.
4392 * std: The `each_key` and `each_value` methods on `HashMap` have been
4393 replaced by the `keys` and `values` iterators.
4394 * std: Functions dealing with type size and alignment have moved from the
4395 `sys` module to the `mem` module.
4396 * std: The `path` module was written and API changed.
4397 * std: `str::from_utf8` has been changed to cast instead of allocate.
4398 * std: `starts_with` and `ends_with` methods added to vectors via the
4399 `ImmutableEqVector` trait, which is in the prelude.
4400 * std: Vectors can be indexed with the `get_opt` method, which returns `None`
4401 if the index is out of bounds.
4402 * std: Task failure no longer propagates between tasks, as the model was
4403 complex, expensive, and incompatible with thread-based tasks.
4404 * std: The `Any` type can be used for dynamic typing.
4405 * std: `~Any` can be passed to the `fail!` macro and retrieved via
4407 * std: Methods that produce iterators generally do not have an `_iter`
4409 * std: `cell::Cell` and `cell::RefCell` can be used to introduce mutability
4410 roots (mutable fields, etc.). Use instead of e.g. `@mut`.
4411 * std: `util::ignore` renamed to `prelude::drop`.
4412 * std: Slices have `sort` and `sort_by` methods via the `MutableVector`
4414 * std: `vec::raw` has seen a lot of cleanup and API changes.
4415 * std: The standard library no longer includes any C++ code, and very
4416 minimal C, eliminating the dependency on libstdc++.
4417 * std: Runtime scheduling and I/O functionality has been factored out into
4418 extensible interfaces and is now implemented by two different crates:
4419 libnative, for native threading and I/O; and libgreen, for green threading
4420 and I/O. This paves the way for using the standard library in more limited
4421 embedded environments.
4422 * std: The `comm` module has been rewritten to be much faster, have a
4423 simpler, more consistent API, and to work for both native and green
4425 * std: All libuv dependencies have been moved into the rustuv crate.
4426 * native: New implementations of runtime scheduling on top of OS threads.
4427 * native: New native implementations of TCP, UDP, file I/O, process spawning,
4429 * green: The green thread scheduler and message passing types are almost
4431 * extra: The `flatpipes` module had bitrotted and was removed.
4432 * extra: All crypto functions have been removed and Rust now has a policy of
4433 not reimplementing crypto in the standard library. In the future crypto
4434 will be provided by external crates with bindings to established libraries.
4435 * extra: `c_vec` has been modernized.
4436 * extra: The `sort` module has been removed. Use the `sort` method on
4440 * The `rust` and `rusti` commands have been removed, due to lack of
4442 * `rustdoc` was completely rewritten.
4443 * `rustdoc` can test code examples in documentation.
4444 * `rustpkg` can test packages with the argument, 'test'.
4445 * `rustpkg` supports arbitrary dependencies, including C libraries.
4446 * `rustc`'s support for generating debug info is improved again.
4447 * `rustc` has better error reporting for unbalanced delimiters.
4448 * `rustc`'s JIT support was removed due to bitrot.
4449 * Executables and static libraries can be built with LTO (-Z lto)
4450 * `rustc` adds a `--dep-info` flag for communicating dependencies to
4454 Version 0.8 (2013-09-26)
4455 ============================
4457 * ~2200 changes, numerous bugfixes
4460 * The `for` loop syntax has changed to work with the `Iterator` trait.
4461 * At long last, unwinding works on Windows.
4462 * Default methods are ready for use.
4463 * Many trait inheritance bugs fixed.
4464 * Owned and borrowed trait objects work more reliably.
4465 * `copy` is no longer a keyword. It has been replaced by the `Clone` trait.
4466 * rustc can omit emission of code for the `debug!` macro if it is passed
4468 * mod.rs is now "blessed". When loading `mod foo;`, rustc will now look
4469 for foo.rs, then foo/mod.rs, and will generate an error when both are
4471 * Strings no longer contain trailing nulls. The new `std::c_str` module
4472 provides new mechanisms for converting to C strings.
4473 * The type of foreign functions is now `extern "C" fn` instead of `*u8'.
4474 * The FFI has been overhauled such that foreign functions are called directly,
4475 instead of through a stack-switching wrapper.
4476 * Calling a foreign function must be done through a Rust function with the
4477 `#[fixed_stack_segment]` attribute.
4478 * The `externfn!` macro can be used to declare both a foreign function and
4479 a `#[fixed_stack_segment]` wrapper at once.
4480 * `pub` and `priv` modifiers on `extern` blocks are no longer parsed.
4481 * `unsafe` is no longer allowed on extern fns - they are all unsafe.
4482 * `priv` is disallowed everywhere except for struct fields and enum variants.
4483 * `&T` (besides `&'static T`) is no longer allowed in `@T`.
4484 * `ref` bindings in irrefutable patterns work correctly now.
4485 * `char` is now prevented from containing invalid code points.
4486 * Casting to `bool` is no longer allowed.
4487 * `\0` is now accepted as an escape in chars and strings.
4488 * `yield` is a reserved keyword.
4489 * `typeof` is a reserved keyword.
4490 * Crates may be imported by URL with `extern mod foo = "url";`.
4491 * Explicit enum discriminants may be given as uints as in `enum E { V = 0u }`
4492 * Static vectors can be initialized with repeating elements,
4493 e.g. `static foo: [u8, .. 100]: [0, .. 100];`.
4494 * Static structs can be initialized with functional record update,
4495 e.g. `static foo: Foo = Foo { a: 5, .. bar };`.
4496 * `cfg!` can be used to conditionally execute code based on the crate
4497 configuration, similarly to `#[cfg(...)]`.
4498 * The `unnecessary_qualification` lint detects unneeded module
4499 prefixes (default: allow).
4500 * Arithmetic operations have been implemented on the SIMD types in
4501 `std::unstable::simd`.
4502 * Exchange allocation headers were removed, reducing memory usage.
4503 * `format!` implements a completely new, extensible, and higher-performance
4504 string formatting system. It will replace `fmt!`.
4505 * `print!` and `println!` write formatted strings (using the `format!`
4506 extension) to stdout.
4507 * `write!` and `writeln!` write formatted strings (using the `format!`
4508 extension) to the new Writers in `std::rt::io`.
4509 * The library section in which a function or static is placed may
4510 be specified with `#[link_section = "..."]`.
4511 * The `proto!` syntax extension for defining bounded message protocols
4513 * `macro_rules!` is hygienic for `let` declarations.
4514 * The `#[export_name]` attribute specifies the name of a symbol.
4515 * `unreachable!` can be used to indicate unreachable code, and fails
4519 * std: Transitioned to the new runtime, written in Rust.
4520 * std: Added an experimental I/O library, `rt::io`, based on the new
4522 * std: A new generic `range` function was added to the prelude, replacing
4523 `uint::range` and friends.
4524 * std: `range_rev` no longer exists. Since range is an iterator it can be
4525 reversed with `range(lo, hi).invert()`.
4526 * std: The `chain` method on option renamed to `and_then`; `unwrap_or_default`
4527 renamed to `unwrap_or`.
4528 * std: The `iterator` module was renamed to `iter`.
4529 * std: Integral types now support the `checked_add`, `checked_sub`, and
4530 `checked_mul` operations for detecting overflow.
4531 * std: Many methods in `str`, `vec`, `option, `result` were renamed for
4533 * std: Methods are standardizing on conventions for casting methods:
4534 `to_foo` for copying, `into_foo` for moving, `as_foo` for temporary
4536 * std: The `CString` type in `c_str` provides new ways to convert to and
4538 * std: `DoubleEndedIterator` can yield elements in two directions.
4539 * std: The `mut_split` method on vectors partitions an `&mut [T]` into
4541 * std: `str::from_bytes` renamed to `str::from_utf8`.
4542 * std: `pop_opt` and `shift_opt` methods added to vectors.
4543 * std: The task-local data interface no longer uses @, and keys are
4544 no longer function pointers.
4545 * std: The `swap_unwrap` method of `Option` renamed to `take_unwrap`.
4546 * std: Added `SharedPort` to `comm`.
4547 * std: `Eq` has a default method for `ne`; only `eq` is required
4549 * std: `Ord` has default methods for `le`, `gt` and `ge`; only `lt`
4550 is required in implementations.
4551 * std: `is_utf8` performance is improved, impacting many string functions.
4552 * std: `os::MemoryMap` provides cross-platform mmap.
4553 * std: `ptr::offset` is now unsafe, but also more optimized. Offsets that
4554 are not 'in-bounds' are considered undefined.
4555 * std: Many freestanding functions in `vec` removed in favor of methods.
4556 * std: Many freestanding functions on scalar types removed in favor of
4558 * std: Many options to task builders were removed since they don't make
4559 sense in the new scheduler design.
4560 * std: More containers implement `FromIterator` so can be created by the
4562 * std: More complete atomic types in `unstable::atomics`.
4563 * std: `comm::PortSet` removed.
4564 * std: Mutating methods in the `Set` and `Map` traits have been moved into
4565 the `MutableSet` and `MutableMap` traits. `Container::is_empty`,
4566 `Map::contains_key`, `MutableMap::insert`, and `MutableMap::remove` have
4567 default implementations.
4568 * std: Various `from_str` functions were removed in favor of a generic
4569 `from_str` which is available in the prelude.
4570 * std: `util::unreachable` removed in favor of the `unreachable!` macro.
4571 * extra: `dlist`, the doubly-linked list was modernized.
4572 * extra: Added a `hex` module with `ToHex` and `FromHex` traits.
4573 * extra: Added `glob` module, replacing `std::os::glob`.
4574 * extra: `rope` was removed.
4575 * extra: `deque` was renamed to `ringbuf`. `RingBuf` implements `Deque`.
4576 * extra: `net`, and `timer` were removed. The experimental replacements
4577 are `std::rt::io::net` and `std::rt::io::timer`.
4578 * extra: Iterators implemented for `SmallIntMap`.
4579 * extra: Iterators implemented for `Bitv` and `BitvSet`.
4580 * extra: `SmallIntSet` removed. Use `BitvSet`.
4581 * extra: Performance of JSON parsing greatly improved.
4582 * extra: `semver` updated to SemVer 2.0.0.
4583 * extra: `term` handles more terminals correctly.
4584 * extra: `dbg` module removed.
4585 * extra: `par` module removed.
4586 * extra: `future` was cleaned up, with some method renames.
4587 * extra: Most free functions in `getopts` were converted to methods.
4590 * rustc's debug info generation (`-Z debug-info`) is greatly improved.
4591 * rustc accepts `--target-cpu` to compile to a specific CPU architecture,
4592 similarly to gcc's `--march` flag.
4593 * rustc's performance compiling small crates is much better.
4594 * rustpkg has received many improvements.
4595 * rustpkg supports git tags as package IDs.
4596 * rustpkg builds into target-specific directories so it can be used for
4598 * The number of concurrent test tasks is controlled by the environment
4599 variable RUST_TEST_TASKS.
4600 * The test harness can now report metrics for benchmarks.
4601 * All tools have man pages.
4602 * Programs compiled with `--test` now support the `-h` and `--help` flags.
4603 * The runtime uses jemalloc for allocations.
4604 * Segmented stacks are temporarily disabled as part of the transition to
4605 the new runtime. Stack overflows are possible!
4606 * A new documentation backend, rustdoc_ng, is available for use. It is
4607 still invoked through the normal `rustdoc` command.
4610 Version 0.7 (2013-07-03)
4611 =======================
4613 * ~2000 changes, numerous bugfixes
4616 * `impl`s no longer accept a visibility qualifier. Put them on methods
4618 * The borrow checker has been rewritten with flow-sensitivity, fixing
4619 many bugs and inconveniences.
4620 * The `self` parameter no longer implicitly means `&'self self`,
4621 and can be explicitly marked with a lifetime.
4622 * Overloadable compound operators (`+=`, etc.) have been temporarily
4623 removed due to bugs.
4624 * The `for` loop protocol now requires `for`-iterators to return `bool`
4625 so they compose better.
4626 * The `Durable` trait is replaced with the `'static` bounds.
4627 * Trait default methods work more often.
4628 * Structs with the `#[packed]` attribute have byte alignment and
4629 no padding between fields.
4630 * Type parameters bound by `Copy` must now be copied explicitly with
4632 * It is now illegal to move out of a dereferenced unsafe pointer.
4633 * `Option<~T>` is now represented as a nullable pointer.
4634 * `@mut` does dynamic borrow checks correctly.
4635 * The `main` function is only detected at the topmost level of the crate.
4636 The `#[main]` attribute is still valid anywhere.
4637 * Struct fields may no longer be mutable. Use inherited mutability.
4638 * The `#[no_send]` attribute makes a type that would otherwise be
4640 * The `#[no_freeze]` attribute makes a type that would otherwise be
4642 * Unbounded recursion will abort the process after reaching the limit
4643 specified by the `RUST_MAX_STACK` environment variable (default: 1GB).
4644 * The `vecs_implicitly_copyable` lint mode has been removed. Vectors
4645 are never implicitly copyable.
4646 * `#[static_assert]` makes compile-time assertions about static bools.
4647 * At long last, 'argument modes' no longer exist.
4648 * The rarely used `use mod` statement no longer exists.
4651 * `fail!` and `assert!` accept `~str`, `&'static str` or `fmt!`-style
4653 * `Encodable`, `Decodable`, `Ord`, `TotalOrd`, `TotalEq`, `DeepClone`,
4654 `Rand`, `Zero` and `ToStr` can all be automatically derived with
4656 * The `bytes!` macro returns a vector of bytes for string, u8, char,
4657 and unsuffixed integer literals.
4660 * The `core` crate was renamed to `std`.
4661 * The `std` crate was renamed to `extra`.
4662 * More and improved documentation.
4663 * std: `iterator` module for external iterator objects.
4664 * Many old-style (internal, higher-order function) iterators replaced by
4665 implementations of `Iterator`.
4666 * std: Many old internal vector and string iterators,
4667 incl. `any`, `all`. removed.
4668 * std: The `finalize` method of `Drop` renamed to `drop`.
4669 * std: The `drop` method now takes `&mut self` instead of `&self`.
4670 * std: The prelude no longer reexports any modules, only types and traits.
4671 * std: Prelude additions: `print`, `println`, `FromStr`, `ApproxEq`, `Equiv`,
4672 `Iterator`, `IteratorUtil`, many numeric traits, many tuple traits.
4673 * std: New numeric traits: `Fractional`, `Real`, `RealExt`, `Integer`, `Ratio`,
4674 `Algebraic`, `Trigonometric`, `Exponential`, `Primitive`.
4675 * std: Tuple traits and accessors defined for up to 12-tuples, e.g.
4676 `(0, 1, 2).n2()` or `(0, 1, 2).n2_ref()`.
4677 * std: Many types implement `Clone`.
4678 * std: `path` type renamed to `Path`.
4679 * std: `mut` module and `Mut` type removed.
4680 * std: Many standalone functions removed in favor of methods and iterators
4681 in `vec`, `str`. In the future methods will also work as functions.
4682 * std: `reinterpret_cast` removed. Use `transmute`.
4683 * std: ascii string handling in `std::ascii`.
4684 * std: `Rand` is implemented for ~/@.
4685 * std: `run` module for spawning processes overhauled.
4686 * std: Various atomic types added to `unstable::atomic`.
4687 * std: Various types implement `Zero`.
4688 * std: `LinearMap` and `LinearSet` renamed to `HashMap` and `HashSet`.
4689 * std: Borrowed pointer functions moved from `ptr` to `borrow`.
4690 * std: Added `os::mkdir_recursive`.
4691 * std: Added `os::glob` function performs filesystems globs.
4692 * std: `FuzzyEq` renamed to `ApproxEq`.
4693 * std: `Map` now defines `pop` and `swap` methods.
4694 * std: `Cell` constructors converted to static methods.
4695 * extra: `rc` module adds the reference counted pointers, `Rc` and `RcMut`.
4696 * extra: `flate` module moved from `std` to `extra`.
4697 * extra: `fileinput` module for iterating over a series of files.
4698 * extra: `Complex` number type and `complex` module.
4699 * extra: `Rational` number type and `rational` module.
4700 * extra: `BigInt`, `BigUint` implement numeric and comparison traits.
4701 * extra: `term` uses terminfo now, is more correct.
4702 * extra: `arc` functions converted to methods.
4703 * extra: Implementation of fixed output size variations of SHA-2.
4706 * `unused_variable` lint mode for unused variables (default: warn).
4707 * `unused_unsafe` lint mode for detecting unnecessary `unsafe` blocks
4709 * `unused_mut` lint mode for identifying unused `mut` qualifiers
4711 * `dead_assignment` lint mode for unread variables (default: warn).
4712 * `unnecessary_allocation` lint mode detects some heap allocations that are
4713 immediately borrowed so could be written without allocating (default: warn).
4714 * `missing_doc` lint mode (default: allow).
4715 * `unreachable_code` lint mode (default: warn).
4716 * The `rusti` command has been rewritten and a number of bugs addressed.
4717 * rustc outputs in color on more terminals.
4718 * rustc accepts a `--link-args` flag to pass arguments to the linker.
4719 * rustc accepts a `-Z print-link-args` flag for debugging linkage.
4720 * Compiling with `-g` will make the binary record information about
4721 dynamic borrowcheck failures for debugging.
4722 * rustdoc has a nicer stylesheet.
4723 * Various improvements to rustdoc.
4724 * Improvements to rustpkg (see the detailed release notes).
4727 Version 0.6 (2013-04-03)
4728 ========================
4730 * ~2100 changes, numerous bugfixes
4733 * The self type parameter in traits is now spelled `Self`
4734 * The `self` parameter in trait and impl methods must now be explicitly
4735 named (for example: `fn f(&self) { }`). Implicit self is deprecated.
4736 * Static methods no longer require the `static` keyword and instead
4737 are distinguished by the lack of a `self` parameter
4738 * Replaced the `Durable` trait with the `'static` lifetime
4739 * The old closure type syntax with the trailing sigil has been
4740 removed in favor of the more consistent leading sigil
4741 * `super` is a keyword, and may be prefixed to paths
4742 * Trait bounds are separated with `+` instead of whitespace
4743 * Traits are implemented with `impl Trait for Type`
4744 instead of `impl Type: Trait`
4745 * Lifetime syntax is now `&'l foo` instead of `&l/foo`
4746 * The `export` keyword has finally been removed
4747 * The `move` keyword has been removed (see "Semantic changes")
4748 * The interior mutability qualifier on vectors, `[mut T]`, has been
4749 removed. Use `&mut [T]`, etc.
4750 * `mut` is no longer valid in `~mut T`. Use inherited mutability
4751 * `fail` is no longer a keyword. Use `fail!()`
4752 * `assert` is no longer a keyword. Use `assert!()`
4753 * `log` is no longer a keyword. use `debug!`, etc.
4754 * 1-tuples may be represented as `(T,)`
4755 * Struct fields may no longer be `mut`. Use inherited mutability,
4756 `@mut T`, `core::mut` or `core::cell`
4757 * `extern mod { ... }` is no longer valid syntax for foreign
4758 function modules. Use extern blocks: `extern { ... }`
4759 * Newtype enums removed. Use tuple-structs.
4760 * Trait implementations no longer support visibility modifiers
4761 * Pattern matching over vectors improved and expanded
4762 * `const` renamed to `static` to correspond to lifetime name,
4763 and make room for future `static mut` unsafe mutable globals.
4764 * Replaced `#[deriving_eq]` with `#[deriving(Eq)]`, etc.
4765 * `Clone` implementations can be automatically generated with
4766 `#[deriving(Clone)]`
4767 * Casts to traits must use a pointer sigil, e.g. `@foo as @Bar`
4768 instead of `foo as Bar`.
4769 * Fixed length vector types are now written as `[int, .. 3]`
4770 instead of `[int * 3]`.
4771 * Fixed length vector types can express the length as a constant
4772 expression. (ex: `[int, .. GL_BUFFER_SIZE - 2]`)
4775 * Types with owned pointers or custom destructors move by default,
4776 eliminating the `move` keyword
4777 * All foreign functions are considered unsafe
4778 * &mut is now unaliasable
4779 * Writes to borrowed @mut pointers are prevented dynamically
4781 * The name of the main function can be customized using #[main]
4782 * The default type of an inferred closure is &fn instead of @fn
4783 * `use` statements may no longer be "chained" - they cannot import
4784 identifiers imported by previous `use` statements
4785 * `use` statements are crate relative, importing from the "top"
4786 of the crate by default. Paths may be prefixed with `super::`
4787 or `self::` to change the search behavior.
4788 * Method visibility is inherited from the implementation declaration
4789 * Structural records have been removed
4790 * Many more types can be used in static items, including enums
4791 'static-lifetime pointers and vectors
4792 * Pattern matching over vectors improved and expanded
4793 * Typechecking of closure types has been overhauled to
4794 improve inference and eliminate unsoundness
4795 * Macros leave scope at the end of modules, unless that module is
4796 tagged with #[macro_escape]
4799 * Added big integers to `std::bigint`
4800 * Removed `core::oldcomm` module
4801 * Added pipe-based `core::comm` module
4802 * Numeric traits have been reorganized under `core::num`
4803 * `vec::slice` finally returns a slice
4804 * `debug!` and friends don't require a format string, e.g. `debug!(Foo)`
4805 * Containers reorganized around traits in `core::container`
4806 * `core::dvec` removed, `~[T]` is a drop-in replacement
4807 * `core::send_map` renamed to `core::hashmap`
4808 * `std::map` removed; replaced with `core::hashmap`
4809 * `std::treemap` reimplemented as an owned balanced tree
4810 * `std::deque` and `std::smallintmap` reimplemented as owned containers
4811 * `core::trie` added as a fast ordered map for integer keys
4812 * Set types added to `core::hashmap`, `core::trie` and `std::treemap`
4813 * `Ord` split into `Ord` and `TotalOrd`. `Ord` is still used to
4814 overload the comparison operators, whereas `TotalOrd` is used
4815 by certain container types
4818 * Replaced the 'cargo' package manager with 'rustpkg'
4819 * Added all-purpose 'rust' tool
4820 * `rustc --test` now supports benchmarks with the `#[bench]` attribute
4821 * rustc now *attempts* to offer spelling suggestions
4822 * Improved support for ARM and Android
4823 * Preliminary MIPS backend
4824 * Improved foreign function ABI implementation for x86, x86_64
4825 * Various memory usage improvements
4826 * Rust code may be embedded in foreign code under limited circumstances
4827 * Inline assembler supported by new asm!() syntax extension.
4830 Version 0.5 (2012-12-21)
4831 ===========================
4833 * ~900 changes, numerous bugfixes
4836 * Removed `<-` move operator
4837 * Completed the transition from the `#fmt` extension syntax to `fmt!`
4838 * Removed old fixed length vector syntax - `[T]/N`
4839 * New token-based quasi-quoters, `quote_tokens!`, `quote_expr!`, etc.
4840 * Macros may now expand to items and statements
4841 * `a.b()` is always parsed as a method call, never as a field projection
4842 * `Eq` and `IterBytes` implementations can be automatically generated
4843 with `#[deriving_eq]` and `#[deriving_iter_bytes]` respectively
4844 * Removed the special crate language for `.rc` files
4845 * Function arguments may consist of any irrefutable pattern
4848 * `&` and `~` pointers may point to objects
4849 * Tuple structs - `struct Foo(Bar, Baz)`. Will replace newtype enums.
4850 * Enum variants may be structs
4851 * Destructors can be added to all nominal types with the Drop trait
4852 * Structs and nullary enum variants may be constants
4853 * Values that cannot be implicitly copied are now automatically moved
4854 without writing `move` explicitly
4855 * `&T` may now be coerced to `*T`
4856 * Coercions happen in `let` statements as well as function calls
4857 * `use` statements now take crate-relative paths
4858 * The module and type namespaces have been merged so that static
4859 method names can be resolved under the trait in which they are
4862 * Improved support for language features
4863 * Trait inheritance works in many scenarios
4864 * More support for explicit self arguments in methods - `self`, `&self`
4865 `@self`, and `~self` all generally work as expected
4866 * Static methods work in more situations
4867 * Experimental: Traits may declare default methods for the implementations
4871 * New condition handling system in `core::condition`
4872 * Timsort added to `std::sort`
4873 * New priority queue, `std::priority_queue`
4874 * Pipes for serializable types, `std::flatpipes'
4875 * Serialization overhauled to be trait-based
4876 * Expanded `getopts` definitions
4877 * Moved futures to `std`
4878 * More functions are pure now
4879 * `core::comm` renamed to `oldcomm`. Still deprecated
4880 * `rustdoc` and `cargo` are libraries now
4883 * Added a preliminary REPL, `rusti`
4884 * License changed from MIT to dual MIT/APL2
4887 Version 0.4 (2012-10-15)
4888 ==========================
4890 * ~2000 changes, numerous bugfixes
4893 * All keywords are now strict and may not be used as identifiers anywhere
4894 * Keyword removal: 'again', 'import', 'check', 'new', 'owned', 'send',
4895 'of', 'with', 'to', 'class'.
4896 * Classes are replaced with simpler structs
4897 * Explicit method self types
4898 * `ret` became `return` and `alt` became `match`
4899 * `import` is now `use`; `use is now `extern mod`
4900 * `extern mod { ... }` is now `extern { ... }`
4901 * `use mod` is the recommended way to import modules
4902 * `pub` and `priv` replace deprecated export lists
4903 * The syntax of `match` pattern arms now uses fat arrow (=>)
4904 * `main` no longer accepts an args vector; use `os::args` instead
4907 * Trait implementations are now coherent, ala Haskell typeclasses
4908 * Trait methods may be static
4909 * Argument modes are deprecated
4910 * Borrowed pointers are much more mature and recommended for use
4911 * Strings and vectors in the static region are stored in constant memory
4912 * Typestate was removed
4913 * Resolution rewritten to be more reliable
4914 * Support for 'dual-mode' data structures (freezing and thawing)
4917 * Most binary operators can now be overloaded via the traits in
4919 * `std::net::url` for representing URLs
4920 * Sendable hash maps in `core::send_map`
4921 * `core::task' gained a (currently unsafe) task-local storage API
4924 * An efficient new intertask communication primitive called the pipe,
4925 along with a number of higher-level channel types, in `core::pipes`
4926 * `std::arc`, an atomically reference counted, immutable, shared memory
4928 * `std::sync`, various exotic synchronization tools based on arcs and pipes
4929 * Futures are now based on pipes and sendable
4930 * More robust linked task failure
4931 * Improved task builder API
4934 * Improved error reporting
4935 * Preliminary JIT support
4936 * Preliminary work on precise GC
4937 * Extensive architectural improvements to rustc
4938 * Begun a transition away from buggy C++-based reflection (shape) code to
4939 Rust-based (visitor) code
4940 * All hash functions and tables converted to secure, randomized SipHash
4943 Version 0.3 (2012-07-12)
4944 ========================
4946 * ~1900 changes, numerous bugfixes
4948 * New coding conveniences
4949 * Integer-literal suffix inference
4950 * Per-item control over warnings, errors
4951 * #[cfg(windows)] and #[cfg(unix)] attributes
4952 * Documentation comments
4953 * More compact closure syntax
4954 * 'do' expressions for treating higher-order functions as
4956 * *-patterns (wildcard extended to all constructor fields)
4959 * Name resolution pass and exhaustiveness checker rewritten
4960 * Region pointers and borrow checking supersede alias
4962 * Init-ness checking is now provided by a region-based liveness
4963 pass instead of the typestate pass; same for last-use analysis
4964 * Extensive work on region pointers
4966 * Experimental new language features
4967 * Slices and fixed-size, interior-allocated vectors
4968 * #!-comments for lang versioning, shell execution
4969 * Destructors and iface implementation for classes;
4970 type-parameterized classes and class methods
4971 * 'const' type kind for types that can be used to implement
4972 shared-memory concurrency patterns
4976 * Removal of various obsolete features
4977 * Keywords: 'be', 'prove', 'syntax', 'note', 'mutable', 'bind',
4978 'crust', 'native' (now 'extern'), 'cont' (now 'again')
4980 * Constructs: do-while loops ('do' repurposed), fn binding,
4981 resources (replaced by destructors)
4983 * Compiler reorganization
4984 * Syntax-layer of compiler split into separate crate
4985 * Clang (from LLVM project) integrated into build
4986 * Typechecker split into sub-modules
4989 * New time functions
4990 * Extension methods for many built-in types
4991 * Arc: atomic-refcount read-only / exclusive-use shared cells
4992 * Par: parallel map and search routines
4993 * Extensive work on libuv interface
4994 * Much vector code moved to libraries
4995 * Syntax extensions: #line, #col, #file, #mod, #stringify,
4996 #include, #include_str, #include_bin
4999 * Cargo automatically resolves dependencies
5002 Version 0.2 (2012-03-29)
5003 =========================
5005 * >1500 changes, numerous bugfixes
5007 * New docs and doc tooling
5009 * New port: FreeBSD x86_64
5011 * Compilation model enhancements
5012 * Generics now specialized, multiply instantiated
5013 * Functions now inlined across separate crates
5015 * Scheduling, stack and threading fixes
5016 * Noticeably improved message-passing performance
5017 * Explicit schedulers
5021 * Experimental new language features
5022 * Operator overloading
5026 * Various language extensions
5027 * C-callback function types: 'crust fn ...'
5028 * Infinite-loop construct: 'loop { ... }'
5029 * Shorten 'mutable' to 'mut'
5030 * Required mutable-local qualifier: 'let mut ...'
5031 * Basic glob-exporting: 'export foo::*;'
5032 * Alt now exhaustive, 'alt check' for runtime-checked
5033 * Block-function form of 'for' loop, with 'break' and 'ret'.
5036 * AST quasi-quote syntax extension
5037 * Revived libuv interface
5038 * New modules: core::{future, iter}, std::arena
5039 * Merged per-platform std::{os*, fs*} to core::{libc, os}
5040 * Extensive cleanup, regularization in libstd, libcore
5043 Version 0.1 (2012-01-20)
5044 ===============================
5046 * Most language features work, including:
5047 * Unique pointers, unique closures, move semantics
5048 * Interface-constrained generics
5049 * Static interface dispatch
5051 * Multithread task scheduling
5052 * Typestate predicates
5053 * Failure unwinding, destructors
5054 * Pattern matching and destructuring assignment
5055 * Lightweight block-lambda syntax
5056 * Preliminary macro-by-example
5058 * Compiler works with the following configurations:
5059 * Linux: x86 and x86_64 hosts and targets
5060 * macOS: x86 and x86_64 hosts and targets
5061 * Windows: x86 hosts and targets
5063 * Cross compilation / multi-target configuration supported.
5065 * Preliminary API-documentation and package-management tools included.
5069 * Documentation is incomplete.
5071 * Performance is below intended target.
5073 * Standard library APIs are subject to extensive change, reorganization.
5075 * Language-level versioning is not yet operational - future code will