1 Version 1.15.1 (2017-02-09)
2 ===========================
4 * [Fix IntoIter::as_mut_slice's signature][39466]
5 * [Compile compiler builtins with `-fPIC` on 32-bit platforms][39523]
7 [39466]: https://github.com/rust-lang/rust/pull/39466
8 [39523]: https://github.com/rust-lang/rust/pull/39523
11 Version 1.15.0 (2017-02-02)
12 ===========================
17 * Basic procedural macros allowing custom `#[derive]`, aka "macros 1.1", are
18 stable. This allows popular code-generating crates like Serde and Diesel to
19 work ergonomically. [RFC 1681].
20 * [Tuple structs may be empty. Unary and empty tuple structs may be instantiated
21 with curly braces][36868]. Part of [RFC 1506].
22 * [A number of minor changes to name resolution have been activated][37127].
23 They add up to more consistent semantics, allowing for future evolution of
24 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
25 details of what is different. The breaking changes here have been transitioned
26 through the [`legacy_imports`] lint since 1.14, with no known regressions.
27 * [In `macro_rules`, `path` fragments can now be parsed as type parameter
29 * [`?Sized` can be used in `where` clauses][37791]
30 * [There is now a limit on the size of monomorphized types and it can be
31 modified with the `#![type_size_limit]` crate attribute, similarly to
32 the `#![recursion_limit]` attribute][37789]
37 * [On Windows, the compiler will apply dllimport attributes when linking to
38 extern functions][37973]. Additional attributes and flags can control which
39 library kind is linked and its name. [RFC 1717].
40 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
41 * [The `--test` flag works with procedural macro crates][38107]
42 * [Fix `extern "aapcs" fn` ABI][37814]
43 * [The `-C no-stack-check` flag is deprecated][37636]. It does nothing.
44 * [The `format!` expander recognizes incorrect `printf` and shell-style
45 formatting directives and suggests the correct format][37613].
46 * [Only report one error for all unused imports in an import list][37456]
51 * [Avoid unnecessary `mk_ty` calls in `Ty::super_fold_with`][37705]
52 * [Avoid more unnecessary `mk_ty` calls in `Ty::super_fold_with`][37979]
53 * [Don't clone in `UnificationTable::probe`][37848]
54 * [Remove `scope_auxiliary` to cut RSS by 10%][37764]
55 * [Use small vectors in type walker][37760]
56 * [Macro expansion performance was improved][37701]
57 * [Change `HirVec<P<T>>` to `HirVec<T>` in `hir::Expr`][37642]
58 * [Replace FNV with a faster hash function][37229]
63 * [`std::iter::Iterator::min_by`]
64 * [`std::iter::Iterator::max_by`]
65 * [`std::os::*::fs::FileExt`]
66 * [`std::sync::atomic::Atomic*::get_mut`]
67 * [`std::sync::atomic::Atomic*::into_inner`]
68 * [`std::vec::IntoIter::as_slice`]
69 * [`std::vec::IntoIter::as_mut_slice`]
70 * [`std::sync::mpsc::Receiver::try_iter`]
71 * [`std::os::unix::process::CommandExt::before_exec`]
72 * [`std::rc::Rc::strong_count`]
73 * [`std::rc::Rc::weak_count`]
74 * [`std::sync::Arc::strong_count`]
75 * [`std::sync::Arc::weak_count`]
76 * [`std::char::encode_utf8`]
77 * [`std::char::encode_utf16`]
78 * [`std::cell::Ref::clone`]
79 * [`std::io::Take::into_inner`]
84 * [The standard sorting algorithm has been rewritten for dramatic performance
85 improvements][38192]. It is a hybrid merge sort, drawing influences from
86 Timsort. Previously it was a naive merge sort.
87 * [`Iterator::nth` no longer has a `Sized` bound][38134]
88 * [`Extend<&T>` is specialized for `Vec` where `T: Copy`][38182] to improve
90 * [`chars().count()` is much faster][37888] and so are [`chars().last()`
91 and `char_indices().last()`][37882]
92 * [Fix ARM Objective-C ABI in `std::env::args`][38146]
93 * [Chinese characters display correctly in `fmt::Debug`][37855]
94 * [Derive `Default` for `Duration`][37699]
95 * [Support creation of anonymous pipes on WinXP/2k][37677]
96 * [`mpsc::RecvTimeoutError` implements `Error`][37527]
97 * [Don't pass overlapped handles to processes][38835]
102 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
103 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
104 should instead check the variable at runtime with `std::env`. That the value
105 was set at build time was a bug, and incorrect when cross-compiling. This
106 change is known to cause breakage.
107 * [Add `--all` flag to `cargo test`][cargo/3221]
108 * [Compile statically against the MSVC CRT][cargo/3363]
109 * [Mix feature flags into fingerprint/metadata shorthash][cargo/3102]
110 * [Link OpenSSL statically on OSX][cargo/3311]
111 * [Apply new fingerprinting to build dir outputs][cargo/3310]
112 * [Test for bad path overrides with summaries][cargo/3336]
113 * [Require `cargo install --vers` to take a semver version][cargo/3338]
114 * [Fix retrying crate downloads for network errors][cargo/3348]
115 * [Implement string lookup for `build.rustflags` config key][cargo/3356]
116 * [Emit more info on --message-format=json][cargo/3319]
117 * [Assume `build.rs` in the same directory as `Cargo.toml` is a build script][cargo/3361]
118 * [Don't ignore errors in workspace manifest][cargo/3409]
119 * [Fix `--message-format JSON` when rustc emits non-JSON warnings][cargo/3410]
124 * [Test runners (binaries built with `--test`) now support a `--list` argument
125 that lists the tests it contains][38185]
126 * [Test runners now support a `--exact` argument that makes the test filter
127 match exactly, instead of matching only a substring of the test name][38181]
128 * [rustdoc supports a `--playground-url` flag][37763]
129 * [rustdoc provides more details about `#[should_panic]` errors][37749]
134 * [The Rust build system is now written in Rust][37817]. The Makefiles may
135 continue to be used in this release by passing `--disable-rustbuild` to the
136 configure script, but they will be deleted soon. Note that the new build
137 system uses a different on-disk layout that will likely affect any scripts
139 * [Rust supports i686-unknown-openbsd][38086]. Tier 3 support. No testing or
141 * [Rust supports the MSP430][37627]. Tier 3 support. No testing or releases.
142 * [Rust supports the ARMv5TE architecture][37615]. Tier 3 support. No testing or
148 * [A number of minor changes to name resolution have been activated][37127].
149 They add up to more consistent semantics, allowing for future evolution of
150 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
151 details of what is different. The breaking changes here have been transitioned
152 through the [`legacy_imports`] lint since 1.14, with no known regressions.
153 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
154 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
155 should instead check the variable at runtime with `std::env`. That the value
156 was set at build time was a bug, and incorrect when cross-compiling. This
157 change is known to cause breakage.
158 * [Higher-ranked lifetimes are no longer allowed to appear _only_ in associated
159 types][33685]. The [`hr_lifetime_in_assoc_type` lint] has been a warning since
160 1.10 and is now an error by default. It will become a hard error in the near
162 * [The semantics relating modules to file system directories are changing in
163 minor ways][37602]. This is captured in the new `legacy_directory_ownership`
164 lint, which is a warning in this release, and will become a hard error in the
166 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
167 * [Once `Peekable` peeks a `None` it will return that `None` without re-querying
168 the underlying iterator][37834]
170 ["changes"]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md#changes-to-name-resolution-rules
171 [33685]: https://github.com/rust-lang/rust/issues/33685
172 [36868]: https://github.com/rust-lang/rust/pull/36868
173 [37127]: https://github.com/rust-lang/rust/pull/37127
174 [37229]: https://github.com/rust-lang/rust/pull/37229
175 [37456]: https://github.com/rust-lang/rust/pull/37456
176 [37527]: https://github.com/rust-lang/rust/pull/37527
177 [37602]: https://github.com/rust-lang/rust/pull/37602
178 [37613]: https://github.com/rust-lang/rust/pull/37613
179 [37615]: https://github.com/rust-lang/rust/pull/37615
180 [37636]: https://github.com/rust-lang/rust/pull/37636
181 [37627]: https://github.com/rust-lang/rust/pull/37627
182 [37642]: https://github.com/rust-lang/rust/pull/37642
183 [37677]: https://github.com/rust-lang/rust/pull/37677
184 [37699]: https://github.com/rust-lang/rust/pull/37699
185 [37701]: https://github.com/rust-lang/rust/pull/37701
186 [37705]: https://github.com/rust-lang/rust/pull/37705
187 [37749]: https://github.com/rust-lang/rust/pull/37749
188 [37760]: https://github.com/rust-lang/rust/pull/37760
189 [37763]: https://github.com/rust-lang/rust/pull/37763
190 [37764]: https://github.com/rust-lang/rust/pull/37764
191 [37789]: https://github.com/rust-lang/rust/pull/37789
192 [37791]: https://github.com/rust-lang/rust/pull/37791
193 [37814]: https://github.com/rust-lang/rust/pull/37814
194 [37817]: https://github.com/rust-lang/rust/pull/37817
195 [37834]: https://github.com/rust-lang/rust/pull/37834
196 [37848]: https://github.com/rust-lang/rust/pull/37848
197 [37855]: https://github.com/rust-lang/rust/pull/37855
198 [37882]: https://github.com/rust-lang/rust/pull/37882
199 [37888]: https://github.com/rust-lang/rust/pull/37888
200 [37973]: https://github.com/rust-lang/rust/pull/37973
201 [37979]: https://github.com/rust-lang/rust/pull/37979
202 [38086]: https://github.com/rust-lang/rust/pull/38086
203 [38107]: https://github.com/rust-lang/rust/pull/38107
204 [38117]: https://github.com/rust-lang/rust/pull/38117
205 [38134]: https://github.com/rust-lang/rust/pull/38134
206 [38146]: https://github.com/rust-lang/rust/pull/38146
207 [38181]: https://github.com/rust-lang/rust/pull/38181
208 [38182]: https://github.com/rust-lang/rust/pull/38182
209 [38185]: https://github.com/rust-lang/rust/pull/38185
210 [38192]: https://github.com/rust-lang/rust/pull/38192
211 [38279]: https://github.com/rust-lang/rust/pull/38279
212 [38835]: https://github.com/rust-lang/rust/pull/38835
213 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
214 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
215 [RFC 1560]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md
216 [RFC 1681]: https://github.com/rust-lang/rfcs/blob/master/text/1681-macros-1.1.md
217 [RFC 1717]: https://github.com/rust-lang/rfcs/blob/master/text/1717-dllimport.md
218 [`hr_lifetime_in_assoc_type` lint]: https://github.com/rust-lang/rust/issues/33685
219 [`legacy_imports`]: https://github.com/rust-lang/rust/pull/38271
220 [cargo/3102]: https://github.com/rust-lang/cargo/pull/3102
221 [cargo/3221]: https://github.com/rust-lang/cargo/pull/3221
222 [cargo/3310]: https://github.com/rust-lang/cargo/pull/3310
223 [cargo/3311]: https://github.com/rust-lang/cargo/pull/3311
224 [cargo/3319]: https://github.com/rust-lang/cargo/pull/3319
225 [cargo/3336]: https://github.com/rust-lang/cargo/pull/3336
226 [cargo/3338]: https://github.com/rust-lang/cargo/pull/3338
227 [cargo/3348]: https://github.com/rust-lang/cargo/pull/3348
228 [cargo/3356]: https://github.com/rust-lang/cargo/pull/3356
229 [cargo/3361]: https://github.com/rust-lang/cargo/pull/3361
230 [cargo/3363]: https://github.com/rust-lang/cargo/pull/3363
231 [cargo/3368]: https://github.com/rust-lang/cargo/issues/3368
232 [cargo/3409]: https://github.com/rust-lang/cargo/pull/3409
233 [cargo/3410]: https://github.com/rust-lang/cargo/pull/3410
234 [`std::iter::Iterator::min_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.min_by
235 [`std::iter::Iterator::max_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.max_by
236 [`std::os::*::fs::FileExt`]: https://doc.rust-lang.org/std/os/unix/fs/trait.FileExt.html
237 [`std::sync::atomic::Atomic*::get_mut`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.get_mut
238 [`std::sync::atomic::Atomic*::into_inner`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.into_inner
239 [`std::vec::IntoIter::as_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_slice
240 [`std::vec::IntoIter::as_mut_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_mut_slice
241 [`std::sync::mpsc::Receiver::try_iter`]: https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.try_iter
242 [`std::os::unix::process::CommandExt::before_exec`]: https://doc.rust-lang.org/std/os/unix/process/trait.CommandExt.html#tymethod.before_exec
243 [`std::rc::Rc::strong_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.strong_count
244 [`std::rc::Rc::weak_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.weak_count
245 [`std::sync::Arc::strong_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.strong_count
246 [`std::sync::Arc::weak_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.weak_count
247 [`std::char::encode_utf8`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf8
248 [`std::char::encode_utf16`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf16
249 [`std::cell::Ref::clone`]: https://doc.rust-lang.org/std/cell/struct.Ref.html#method.clone
250 [`std::io::Take::into_inner`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.into_inner
253 Version 1.14.0 (2016-12-22)
254 ===========================
259 * [`..` matches multiple tuple fields in enum variants, structs
260 and tuples][36843]. [RFC 1492].
261 * [Safe `fn` items can be coerced to `unsafe fn` pointers][37389]
262 * [`use *` and `use ::*` both glob-import from the crate root][37367]
263 * [It's now possible to call a `Vec<Box<Fn()>>` without explicit
264 dereferencing][36822]
269 * [Mark enums with non-zero discriminant as non-zero][37224]
270 * [Lower-case `static mut` names are linted like other
271 statics and consts][37162]
272 * [Fix ICE on some macros in const integer positions
273 (e.g. `[u8; m!()]`)][36819]
274 * [Improve error message and snippet for "did you mean `x`"][36798]
275 * [Add a panic-strategy field to the target specification][36794]
276 * [Include LLVM version in `--version --verbose`][37200]
278 Compile-time Optimizations
279 --------------------------
281 * [Improve macro expansion performance][37569]
282 * [Shrink `Expr_::ExprInlineAsm`][37445]
283 * [Replace all uses of SHA-256 with BLAKE2b][37439]
284 * [Reduce the number of bytes hashed by `IchHasher`][37427]
285 * [Avoid more allocations when compiling html5ever][37373]
286 * [Use `SmallVector` in `CombineFields::instantiate`][37322]
287 * [Avoid some allocations in the macro parser][37318]
288 * [Use a faster deflate setting][37298]
289 * [Add `ArrayVec` and `AccumulateVec` to reduce heap allocations
290 during interning of slices][37270]
291 * [Optimize `write_metadata`][37267]
292 * [Don't process obligation forest cycles when stalled][37231]
293 * [Avoid many `CrateConfig` clones][37161]
294 * [Optimize `Substs::super_fold_with`][37108]
295 * [Optimize `ObligationForest`'s `NodeState` handling][36993]
296 * [Speed up `plug_leaks`][36917]
301 * [`println!()`, with no arguments, prints newline][36825].
302 Previously, an empty string was required to achieve the same.
303 * [`Wrapping` impls standard binary and unary operators, as well as
304 the `Sum` and `Product` iterators][37356]
305 * [Implement `From<Cow<str>> for String` and `From<Cow<[T]>> for
307 * [Improve `fold` performance for `chain`, `cloned`, `map`, and
308 `VecDeque` iterators][37315]
309 * [Improve `SipHasher` performance on small values][37312]
310 * [Add Iterator trait TrustedLen to enable better FromIterator /
312 * [Expand `.zip()` specialization to `.map()` and `.cloned()`][37230]
313 * [`ReadDir` implements `Debug`][37221]
314 * [Implement `RefUnwindSafe` for atomic types][37178]
315 * [Specialize `Vec::extend` to `Vec::extend_from_slice`][37094]
316 * [Avoid allocations in `Decoder::read_str`][37064]
317 * [`io::Error` implements `From<io::ErrorKind>`][37037]
318 * [Impl `Debug` for raw pointers to unsized data][36880]
319 * [Don't reuse `HashMap` random seeds][37470]
320 * [The internal memory layout of `HashMap` is more cache-friendly, for
321 significant improvements in some operations][36692]
322 * [`HashMap` uses less memory on 32-bit architectures][36595]
323 * [Impl `Add<{str, Cow<str>}>` for `Cow<str>`][36430]
328 * [Expose rustc cfg values to build scripts][cargo/3243]
329 * [Allow cargo to work with read-only `CARGO_HOME`][cargo/3259]
330 * [Fix passing --features when testing multiple packages][cargo/3280]
331 * [Use a single profile set per workspace][cargo/3249]
332 * [Load `replace` sections from lock files][cargo/3220]
333 * [Ignore `panic` configuration for test/bench profiles][cargo/3175]
338 * [rustup is the recommended Rust installation method][1.14rustup]
339 * This release includes host (rustc) builds for Linux on MIPS, PowerPC, and
340 S390x. These are [tier 2] platforms and may have major defects. Follow the
341 instructions on the website to install, or add the targets to an existing
342 installation with `rustup target add`. The new target triples are:
343 - `mips-unknown-linux-gnu`
344 - `mipsel-unknown-linux-gnu`
345 - `mips64-unknown-linux-gnuabi64`
346 - `mips64el-unknown-linux-gnuabi64 `
347 - `powerpc-unknown-linux-gnu`
348 - `powerpc64-unknown-linux-gnu`
349 - `powerpc64le-unknown-linux-gnu`
350 - `s390x-unknown-linux-gnu `
351 * This release includes target (std) builds for ARM Linux running MUSL
352 libc. These are [tier 2] platforms and may have major defects. Add the
353 following triples to an existing rustup installation with `rustup target add`:
354 - `arm-unknown-linux-musleabi`
355 - `arm-unknown-linux-musleabihf`
356 - `armv7-unknown-linux-musleabihf`
357 * This release includes [experimental support for WebAssembly][1.14wasm], via
358 the `wasm32-unknown-emscripten` target. This target is known to have major
359 defects. Please test, report, and fix.
360 * rustup no longer installs documentation by default. Run `rustup
361 component add rust-docs` to install.
362 * [Fix line stepping in debugger][37310]
363 * [Enable line number debuginfo in releases][37280]
368 * [Disable jemalloc on aarch64/powerpc/mips][37392]
369 * [Add support for Fuchsia OS][37313]
370 * [Detect local-rebuild by only MAJOR.MINOR version][37273]
375 * [A number of forward-compatibility lints used by the compiler
376 to gradually introduce language changes have been converted
377 to deny by default][36894]:
378 - ["use of inaccessible extern crate erroneously allowed"][36886]
379 - ["type parameter default erroneously allowed in invalid location"][36887]
380 - ["detects super or self keywords at the beginning of global path"][36888]
381 - ["two overlapping inherent impls define an item with the same name
382 were erroneously allowed"][36889]
383 - ["floating-point constants cannot be used in patterns"][36890]
384 - ["constants of struct or enum type can only be used in a pattern if
385 the struct or enum has `#[derive(PartialEq, Eq)]`"][36891]
386 - ["lifetimes or labels named `'_` were erroneously allowed"][36892]
387 * [Prohibit patterns in trait methods without bodies][37378]
388 * [The atomic `Ordering` enum may not be matched exhaustively][37351]
389 * [Future-proofing `#[no_link]` breaks some obscure cases][37247]
390 * [The `$crate` macro variable is accepted in fewer locations][37213]
391 * [Impls specifying extra region requirements beyond the trait
392 they implement are rejected][37167]
393 * [Enums may not be unsized][37111]. Unsized enums are intended to
394 work but never have. For now they are forbidden.
395 * [Enforce the shadowing restrictions from RFC 1560 for today's macros][36767]
397 [tier 2]: https://forge.rust-lang.org/platform-support.html
398 [1.14rustup]: https://internals.rust-lang.org/t/beta-testing-rustup-rs/3316/204
399 [1.14wasm]: https://users.rust-lang.org/t/compiling-to-the-web-with-rust-and-emscripten/7627
400 [36430]: https://github.com/rust-lang/rust/pull/36430
401 [36595]: https://github.com/rust-lang/rust/pull/36595
402 [36595]: https://github.com/rust-lang/rust/pull/36595
403 [36692]: https://github.com/rust-lang/rust/pull/36692
404 [36767]: https://github.com/rust-lang/rust/pull/36767
405 [36794]: https://github.com/rust-lang/rust/pull/36794
406 [36798]: https://github.com/rust-lang/rust/pull/36798
407 [36819]: https://github.com/rust-lang/rust/pull/36819
408 [36822]: https://github.com/rust-lang/rust/pull/36822
409 [36825]: https://github.com/rust-lang/rust/pull/36825
410 [36843]: https://github.com/rust-lang/rust/pull/36843
411 [36880]: https://github.com/rust-lang/rust/pull/36880
412 [36886]: https://github.com/rust-lang/rust/issues/36886
413 [36887]: https://github.com/rust-lang/rust/issues/36887
414 [36888]: https://github.com/rust-lang/rust/issues/36888
415 [36889]: https://github.com/rust-lang/rust/issues/36889
416 [36890]: https://github.com/rust-lang/rust/issues/36890
417 [36891]: https://github.com/rust-lang/rust/issues/36891
418 [36892]: https://github.com/rust-lang/rust/issues/36892
419 [36894]: https://github.com/rust-lang/rust/pull/36894
420 [36917]: https://github.com/rust-lang/rust/pull/36917
421 [36993]: https://github.com/rust-lang/rust/pull/36993
422 [37037]: https://github.com/rust-lang/rust/pull/37037
423 [37064]: https://github.com/rust-lang/rust/pull/37064
424 [37094]: https://github.com/rust-lang/rust/pull/37094
425 [37108]: https://github.com/rust-lang/rust/pull/37108
426 [37111]: https://github.com/rust-lang/rust/pull/37111
427 [37161]: https://github.com/rust-lang/rust/pull/37161
428 [37162]: https://github.com/rust-lang/rust/pull/37162
429 [37167]: https://github.com/rust-lang/rust/pull/37167
430 [37178]: https://github.com/rust-lang/rust/pull/37178
431 [37200]: https://github.com/rust-lang/rust/pull/37200
432 [37213]: https://github.com/rust-lang/rust/pull/37213
433 [37221]: https://github.com/rust-lang/rust/pull/37221
434 [37224]: https://github.com/rust-lang/rust/pull/37224
435 [37230]: https://github.com/rust-lang/rust/pull/37230
436 [37231]: https://github.com/rust-lang/rust/pull/37231
437 [37247]: https://github.com/rust-lang/rust/pull/37247
438 [37267]: https://github.com/rust-lang/rust/pull/37267
439 [37270]: https://github.com/rust-lang/rust/pull/37270
440 [37273]: https://github.com/rust-lang/rust/pull/37273
441 [37280]: https://github.com/rust-lang/rust/pull/37280
442 [37298]: https://github.com/rust-lang/rust/pull/37298
443 [37306]: https://github.com/rust-lang/rust/pull/37306
444 [37310]: https://github.com/rust-lang/rust/pull/37310
445 [37312]: https://github.com/rust-lang/rust/pull/37312
446 [37313]: https://github.com/rust-lang/rust/pull/37313
447 [37315]: https://github.com/rust-lang/rust/pull/37315
448 [37318]: https://github.com/rust-lang/rust/pull/37318
449 [37322]: https://github.com/rust-lang/rust/pull/37322
450 [37326]: https://github.com/rust-lang/rust/pull/37326
451 [37351]: https://github.com/rust-lang/rust/pull/37351
452 [37356]: https://github.com/rust-lang/rust/pull/37356
453 [37367]: https://github.com/rust-lang/rust/pull/37367
454 [37373]: https://github.com/rust-lang/rust/pull/37373
455 [37378]: https://github.com/rust-lang/rust/pull/37378
456 [37389]: https://github.com/rust-lang/rust/pull/37389
457 [37392]: https://github.com/rust-lang/rust/pull/37392
458 [37427]: https://github.com/rust-lang/rust/pull/37427
459 [37439]: https://github.com/rust-lang/rust/pull/37439
460 [37445]: https://github.com/rust-lang/rust/pull/37445
461 [37470]: https://github.com/rust-lang/rust/pull/37470
462 [37569]: https://github.com/rust-lang/rust/pull/37569
463 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
464 [cargo/3175]: https://github.com/rust-lang/cargo/pull/3175
465 [cargo/3220]: https://github.com/rust-lang/cargo/pull/3220
466 [cargo/3243]: https://github.com/rust-lang/cargo/pull/3243
467 [cargo/3249]: https://github.com/rust-lang/cargo/pull/3249
468 [cargo/3259]: https://github.com/rust-lang/cargo/pull/3259
469 [cargo/3280]: https://github.com/rust-lang/cargo/pull/3280
472 Version 1.13.0 (2016-11-10)
473 ===========================
478 * [Stabilize the `?` operator][36995]. `?` is a simple way to propagate
479 errors, like the `try!` macro, described in [RFC 0243].
480 * [Stabilize macros in type position][36014]. Described in [RFC 873].
481 * [Stabilize attributes on statements][36995]. Described in [RFC 0016].
482 * [Fix `#[derive]` for empty tuple structs/variants][35728]
483 * [Fix lifetime rules for 'if' conditions][36029]
484 * [Avoid loading and parsing unconfigured non-inline modules][36482]
489 * [Add the `-C link-arg` argument][36574]
490 * [Remove the old AST-based backend from rustc_trans][35764]
491 * [Don't enable NEON by default on armv7 Linux][35814]
492 * [Fix debug line number info for macro expansions][35238]
493 * [Do not emit "class method" debuginfo for types that are not
494 DICompositeType][36008]
495 * [Warn about multiple conflicting #[repr] hints][34623]
496 * [When sizing DST, don't double-count nested struct prefixes][36351]
497 * [Default RUST_MIN_STACK to 16MiB for now][36505]
498 * [Improve rlib metadata format][36551]. Reduces rlib size significantly.
499 * [Reject macros with empty repetitions to avoid infinite loop][36721]
500 * [Expand macros without recursing to avoid stack overflows][36214]
505 * [Replace macro backtraces with labeled local uses][35702]
506 * [Improve error message for missplaced doc comments][33922]
507 * [Buffer unix and lock windows to prevent message interleaving][35975]
508 * [Update lifetime errors to specifically note temporaries][36171]
509 * [Special case a few colors for Windows][36178]
510 * [Suggest `use self` when such an import resolves][36289]
511 * [Be more specific when type parameter shadows primitive type][36338]
512 * Many minor improvements
514 Compile-time Optimizations
515 --------------------------
517 * [Compute and cache HIR hashes at beginning][35854]
518 * [Don't hash types in loan paths][36004]
519 * [Cache projections in trans][35761]
520 * [Optimize the parser's last token handling][36527]
521 * [Only instantiate #[inline] functions in codegen units referencing
522 them][36524]. This leads to big improvements in cases where crates export
523 define many inline functions without using them directly.
524 * [Lazily allocate TypedArena's first chunk][36592]
525 * [Don't allocate during default HashSet creation][36734]
532 * [`overflowing_abs`]
533 * [`RefCell::try_borrow`]
534 * [`RefCell::try_borrow_mut`]
539 * [Add `assert_ne!` and `debug_assert_ne!`][35074]
540 * [Make `vec_deque::Drain`, `hash_map::Drain`, and `hash_set::Drain`
542 * [Implement `AsRef<[T]>` for `std::slice::Iter`][35559]
543 * [Implement `Debug` for `std::vec::IntoIter`][35707]
544 * [`CString`: avoid excessive growth just to 0-terminate][35871]
545 * [Implement `CoerceUnsized` for `{Cell, RefCell, UnsafeCell}`][35627]
546 * [Use arc4rand on FreeBSD][35884]
547 * [memrchr: Correct aligned offset computation][35969]
548 * [Improve Demangling of Rust Symbols][36059]
549 * [Use monotonic time in condition variables][35048]
550 * [Implement `Debug` for `std::path::{Components,Iter}`][36101]
551 * [Implement conversion traits for `char`][35755]
552 * [Fix illegal instruction caused by overflow in channel cloning][36104]
553 * [Zero first byte of CString on drop][36264]
554 * [Inherit overflow checks for sum and product][36372]
555 * [Add missing Eq implementations][36423]
556 * [Implement `Debug` for `DirEntry`][36631]
557 * [When `getaddrinfo` returns `EAI_SYSTEM` retrieve actual error from
559 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
560 * [Implement more traits for `std::io::ErrorKind`][35911]
561 * [Optimize BinaryHeap bounds checking][36072]
562 * [Work around pointer aliasing issue in `Vec::extend_from_slice`,
563 `extend_with_element`][36355]
564 * [Fix overflow checking in unsigned pow()][34942]
569 * This release includes security fixes to both curl and OpenSSL.
570 * [Fix transitive doctests when panic=abort][cargo/3021]
571 * [Add --all-features flag to cargo][cargo/3038]
572 * [Reject path-based dependencies in `cargo package`][cargo/3060]
573 * [Don't parse the home directory more than once][cargo/3078]
574 * [Don't try to generate Cargo.lock on empty workspaces][cargo/3092]
575 * [Update OpenSSL to 1.0.2j][cargo/3121]
576 * [Add license and license_file to cargo metadata output][cargo/3110]
577 * [Make crates-io registry URL optional in config; ignore all changes to
578 source.crates-io][cargo/3089]
579 * [Don't download dependencies from other platforms][cargo/3123]
580 * [Build transitive dev-dependencies when needed][cargo/3125]
581 * [Add support for per-target rustflags in .cargo/config][cargo/3157]
582 * [Avoid updating registry when adding existing deps][cargo/3144]
583 * [Warn about path overrides that won't work][cargo/3136]
584 * [Use workspaces during `cargo install`][cargo/3146]
585 * [Leak mspdbsrv.exe processes on Windows][cargo/3162]
586 * [Add --message-format flag][cargo/3000]
587 * [Pass target environment for rustdoc][cargo/3205]
588 * [Use `CommandExt::exec` for `cargo run` on Unix][cargo/2818]
589 * [Update curl and curl-sys][cargo/3241]
590 * [Call rustdoc test with the correct cfg flags of a package][cargo/3242]
595 * [rustdoc: Add the `--sysroot` argument][36586]
596 * [rustdoc: Fix a couple of issues with the search results][35655]
597 * [rustdoc: remove the `!` from macro URLs and titles][35234]
598 * [gdb: Fix pretty-printing special-cased Rust types][35585]
599 * [rustdoc: Filter more incorrect methods inherited through Deref][36266]
604 * [Remove unmaintained style guide][35124]
605 * [Add s390x support][36369]
606 * [Initial work at Haiku OS support][36727]
607 * [Add mips-uclibc targets][35734]
608 * [Crate-ify compiler-rt into compiler-builtins][35021]
609 * [Add rustc version info (git hash + date) to dist tarball][36213]
610 * Many documentation improvements
615 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
616 * [Deny (by default) transmuting from fn item types to pointer-sized
617 types][34923]. Continuing the long transition to zero-sized fn items,
619 * [Fix `#[derive]` for empty tuple structs/variants][35728].
621 * [Issue deprecation warnings for safe accesses to extern statics][36173]
622 * [Fix lifetime rules for 'if' conditions][36029].
623 * [Inherit overflow checks for sum and product][36372].
624 * [Forbid user-defined macros named "macro_rules"][36730].
626 [33922]: https://github.com/rust-lang/rust/pull/33922
627 [34623]: https://github.com/rust-lang/rust/pull/34623
628 [34923]: https://github.com/rust-lang/rust/pull/34923
629 [34942]: https://github.com/rust-lang/rust/pull/34942
630 [34982]: https://github.com/rust-lang/rust/pull/34982
631 [35021]: https://github.com/rust-lang/rust/pull/35021
632 [35048]: https://github.com/rust-lang/rust/pull/35048
633 [35074]: https://github.com/rust-lang/rust/pull/35074
634 [35124]: https://github.com/rust-lang/rust/pull/35124
635 [35234]: https://github.com/rust-lang/rust/pull/35234
636 [35238]: https://github.com/rust-lang/rust/pull/35238
637 [35354]: https://github.com/rust-lang/rust/pull/35354
638 [35559]: https://github.com/rust-lang/rust/pull/35559
639 [35585]: https://github.com/rust-lang/rust/pull/35585
640 [35627]: https://github.com/rust-lang/rust/pull/35627
641 [35655]: https://github.com/rust-lang/rust/pull/35655
642 [35702]: https://github.com/rust-lang/rust/pull/35702
643 [35707]: https://github.com/rust-lang/rust/pull/35707
644 [35728]: https://github.com/rust-lang/rust/pull/35728
645 [35734]: https://github.com/rust-lang/rust/pull/35734
646 [35755]: https://github.com/rust-lang/rust/pull/35755
647 [35761]: https://github.com/rust-lang/rust/pull/35761
648 [35764]: https://github.com/rust-lang/rust/pull/35764
649 [35814]: https://github.com/rust-lang/rust/pull/35814
650 [35854]: https://github.com/rust-lang/rust/pull/35854
651 [35871]: https://github.com/rust-lang/rust/pull/35871
652 [35884]: https://github.com/rust-lang/rust/pull/35884
653 [35911]: https://github.com/rust-lang/rust/pull/35911
654 [35969]: https://github.com/rust-lang/rust/pull/35969
655 [35975]: https://github.com/rust-lang/rust/pull/35975
656 [36004]: https://github.com/rust-lang/rust/pull/36004
657 [36008]: https://github.com/rust-lang/rust/pull/36008
658 [36014]: https://github.com/rust-lang/rust/pull/36014
659 [36029]: https://github.com/rust-lang/rust/pull/36029
660 [36059]: https://github.com/rust-lang/rust/pull/36059
661 [36072]: https://github.com/rust-lang/rust/pull/36072
662 [36101]: https://github.com/rust-lang/rust/pull/36101
663 [36104]: https://github.com/rust-lang/rust/pull/36104
664 [36171]: https://github.com/rust-lang/rust/pull/36171
665 [36173]: https://github.com/rust-lang/rust/pull/36173
666 [36178]: https://github.com/rust-lang/rust/pull/36178
667 [36213]: https://github.com/rust-lang/rust/pull/36213
668 [36214]: https://github.com/rust-lang/rust/pull/36214
669 [36264]: https://github.com/rust-lang/rust/pull/36264
670 [36266]: https://github.com/rust-lang/rust/pull/36266
671 [36289]: https://github.com/rust-lang/rust/pull/36289
672 [36338]: https://github.com/rust-lang/rust/pull/36338
673 [36351]: https://github.com/rust-lang/rust/pull/36351
674 [36355]: https://github.com/rust-lang/rust/pull/36355
675 [36369]: https://github.com/rust-lang/rust/pull/36369
676 [36372]: https://github.com/rust-lang/rust/pull/36372
677 [36423]: https://github.com/rust-lang/rust/pull/36423
678 [36482]: https://github.com/rust-lang/rust/pull/36482
679 [36505]: https://github.com/rust-lang/rust/pull/36505
680 [36524]: https://github.com/rust-lang/rust/pull/36524
681 [36527]: https://github.com/rust-lang/rust/pull/36527
682 [36551]: https://github.com/rust-lang/rust/pull/36551
683 [36574]: https://github.com/rust-lang/rust/pull/36574
684 [36586]: https://github.com/rust-lang/rust/pull/36586
685 [36592]: https://github.com/rust-lang/rust/pull/36592
686 [36631]: https://github.com/rust-lang/rust/pull/36631
687 [36639]: https://github.com/rust-lang/rust/pull/36639
688 [36721]: https://github.com/rust-lang/rust/pull/36721
689 [36727]: https://github.com/rust-lang/rust/pull/36727
690 [36730]: https://github.com/rust-lang/rust/pull/36730
691 [36734]: https://github.com/rust-lang/rust/pull/36734
692 [36754]: https://github.com/rust-lang/rust/pull/36754
693 [36995]: https://github.com/rust-lang/rust/pull/36995
694 [RFC 0016]: https://github.com/rust-lang/rfcs/blob/master/text/0016-more-attributes.md
695 [RFC 0243]: https://github.com/rust-lang/rfcs/blob/master/text/0243-trait-based-exception-handling.md
696 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
697 [RFC 401]: https://github.com/rust-lang/rfcs/blob/master/text/0401-coercions.md
698 [RFC 873]: https://github.com/rust-lang/rfcs/blob/master/text/0873-type-macros.md
699 [cargo/2818]: https://github.com/rust-lang/cargo/pull/2818
700 [cargo/3000]: https://github.com/rust-lang/cargo/pull/3000
701 [cargo/3021]: https://github.com/rust-lang/cargo/pull/3021
702 [cargo/3038]: https://github.com/rust-lang/cargo/pull/3038
703 [cargo/3060]: https://github.com/rust-lang/cargo/pull/3060
704 [cargo/3078]: https://github.com/rust-lang/cargo/pull/3078
705 [cargo/3089]: https://github.com/rust-lang/cargo/pull/3089
706 [cargo/3092]: https://github.com/rust-lang/cargo/pull/3092
707 [cargo/3110]: https://github.com/rust-lang/cargo/pull/3110
708 [cargo/3121]: https://github.com/rust-lang/cargo/pull/3121
709 [cargo/3123]: https://github.com/rust-lang/cargo/pull/3123
710 [cargo/3125]: https://github.com/rust-lang/cargo/pull/3125
711 [cargo/3136]: https://github.com/rust-lang/cargo/pull/3136
712 [cargo/3144]: https://github.com/rust-lang/cargo/pull/3144
713 [cargo/3146]: https://github.com/rust-lang/cargo/pull/3146
714 [cargo/3157]: https://github.com/rust-lang/cargo/pull/3157
715 [cargo/3162]: https://github.com/rust-lang/cargo/pull/3162
716 [cargo/3205]: https://github.com/rust-lang/cargo/pull/3205
717 [cargo/3241]: https://github.com/rust-lang/cargo/pull/3241
718 [cargo/3242]: https://github.com/rust-lang/cargo/pull/3242
719 [rustup]: https://www.rustup.rs
720 [`checked_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.checked_abs
721 [`wrapping_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.wrapping_abs
722 [`overflowing_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.overflowing_abs
723 [`RefCell::try_borrow`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow
724 [`RefCell::try_borrow_mut`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow_mut
725 [`SipHasher`]: https://doc.rust-lang.org/std/hash/struct.SipHasher.html
726 [`DefaultHasher`]: https://doc.rust-lang.org/std/collections/hash_map/struct.DefaultHasher.html
729 Version 1.12.1 (2016-10-20)
730 ===========================
735 * [ICE: 'rustc' panicked at 'assertion failed: concrete_substs.is_normalized_for_trans()' #36381][36381]
736 * [Confusion with double negation and booleans][36856]
737 * [rustc 1.12.0 fails with SIGSEGV in release mode (syn crate 0.8.0)][36875]
738 * [Rustc 1.12.0 Windows build of `ethcore` crate fails with LLVM error][36924]
739 * [1.12.0: High memory usage when linking in release mode with debug info][36926]
740 * [Corrupted memory after updated to 1.12][36936]
741 * ["Let NullaryConstructor = something;" causes internal compiler error: "tried to overwrite interned AdtDef"][37026]
742 * [Fix ICE: inject bitcast if types mismatch for invokes/calls/stores][37112]
743 * [debuginfo: Handle spread_arg case in MIR-trans in a more stable way.][37153]
745 [36381]: https://github.com/rust-lang/rust/issues/36381
746 [36856]: https://github.com/rust-lang/rust/issues/36856
747 [36875]: https://github.com/rust-lang/rust/issues/36875
748 [36924]: https://github.com/rust-lang/rust/issues/36924
749 [36926]: https://github.com/rust-lang/rust/issues/36926
750 [36936]: https://github.com/rust-lang/rust/issues/36936
751 [37026]: https://github.com/rust-lang/rust/issues/37026
752 [37112]: https://github.com/rust-lang/rust/issues/37112
753 [37153]: https://github.com/rust-lang/rust/issues/37153
756 Version 1.12.0 (2016-09-29)
757 ===========================
762 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)]
763 (https://github.com/rust-lang/rust/pull/34096).
764 This translation pass is far simpler than the previous AST->LLVM pass, and
765 creates opportunities to perform new optimizations directly on the MIR. It
766 was previously described [on the Rust blog]
767 (https://blog.rust-lang.org/2016/04/19/MIR.html).
768 * [`rustc` presents a new, more readable error format, along with
769 machine-readable JSON error output for use by IDEs]
770 (https://github.com/rust-lang/rust/pull/35401).
771 Most common editors supporting Rust have been updated to work with it. It was
772 previously described [on the Rust blog]
773 (https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
778 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)]
779 (https://github.com/rust-lang/rust/pull/34096).
780 This translation pass is far simpler than the previous AST->LLVM pass, and
781 creates opportunities to perform new optimizations directly on the MIR. It
782 was previously described [on the Rust blog]
783 (https://blog.rust-lang.org/2016/04/19/MIR.html).
784 * [Print the Rust target name, not the LLVM target name, with
785 `--print target-list`]
786 (https://github.com/rust-lang/rust/pull/35489)
787 * [The computation of `TypeId` is correct in some cases where it was previously
788 producing inconsistent results]
789 (https://github.com/rust-lang/rust/pull/35267)
790 * [The `mips-unknown-linux-gnu` target uses hardware floating point by default]
791 (https://github.com/rust-lang/rust/pull/34910)
792 * [The `rustc` arguments, `--print target-cpus`, `--print target-features`,
793 `--print relocation-models`, and `--print code-models` print the available
794 options to the `-C target-cpu`, `-C target-feature`, `-C relocation-model` and
795 `-C code-model` code generation arguments]
796 (https://github.com/rust-lang/rust/pull/34845)
797 * [`rustc` supports three new MUSL targets on ARM: `arm-unknown-linux-musleabi`,
798 `arm-unknown-linux-musleabihf`, and `armv7-unknown-linux-musleabihf`]
799 (https://github.com/rust-lang/rust/pull/35060).
800 These targets produce statically-linked binaries. There are no binary release
806 * [`rustc` presents a new, more readable error format, along with
807 machine-readable JSON error output for use by IDEs]
808 (https://github.com/rust-lang/rust/pull/35401).
809 Most common editors supporting Rust have been updated to work with it. It was
810 previously described [on the Rust blog]
811 (https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
812 * [In error descriptions, references are now described in plain English,
813 instead of as "&-ptr"]
814 (https://github.com/rust-lang/rust/pull/35611)
815 * [In error type descriptions, unknown numeric types are named `{integer}` or
816 `{float}` instead of `_`]
817 (https://github.com/rust-lang/rust/pull/35080)
818 * [`rustc` emits a clearer error when inner attributes follow a doc comment]
819 (https://github.com/rust-lang/rust/pull/34676)
824 * [`macro_rules!` invocations can be made within `macro_rules!` invocations]
825 (https://github.com/rust-lang/rust/pull/34925)
826 * [`macro_rules!` meta-variables are hygienic]
827 (https://github.com/rust-lang/rust/pull/35453)
828 * [`macro_rules!` `tt` matchers can be reparsed correctly, making them much more
830 (https://github.com/rust-lang/rust/pull/34908)
831 * [`macro_rules!` `stmt` matchers correctly consume the entire contents when
832 inside non-braces invocations]
833 (https://github.com/rust-lang/rust/pull/34886)
834 * [Semicolons are properly required as statement delimeters inside
835 `macro_rules!` invocations]
836 (https://github.com/rust-lang/rust/pull/34660)
837 * [`cfg_attr` works on `path` attributes]
838 (https://github.com/rust-lang/rust/pull/34546)
844 (https://doc.rust-lang.org/std/cell/struct.Cell.html#method.as_ptr)
845 * [`RefCell::as_ptr`]
846 (https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.as_ptr)
847 * [`IpAddr::is_unspecified`]
848 (https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_unspecified)
849 * [`IpAddr::is_loopback`]
850 (https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_loopback)
851 * [`IpAddr::is_multicast`]
852 (https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_multicast)
853 * [`Ipv4Addr::is_unspecified`]
854 (https://doc.rust-lang.org/std/net/struct.Ipv4Addr.html#method.is_unspecified)
855 * [`Ipv6Addr::octets`]
856 (https://doc.rust-lang.org/std/net/struct.Ipv6Addr.html#method.octets)
857 * [`LinkedList::contains`]
858 (https://doc.rust-lang.org/std/collections/linked_list/struct.LinkedList.html#method.contains)
859 * [`VecDeque::contains`]
860 (https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.contains)
861 * [`ExitStatusExt::from_raw`]
862 (https://doc.rust-lang.org/std/os/unix/process/trait.ExitStatusExt.html#tymethod.from_raw).
863 Both on Unix and Windows.
864 * [`Receiver::recv_timeout`]
865 (https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.recv_timeout)
866 * [`RecvTimeoutError`]
867 (https://doc.rust-lang.org/std/sync/mpsc/enum.RecvTimeoutError.html)
868 * [`BinaryHeap::peek_mut`]
869 (https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.peek_mut)
871 (https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html)
873 (https://doc.rust-lang.org/std/iter/trait.Product.html)
875 (https://doc.rust-lang.org/std/iter/trait.Sum.html)
876 * [`OccupiedEntry::remove_entry`]
877 (https://doc.rust-lang.org/std/collections/btree_map/struct.OccupiedEntry.html#method.remove_entry)
878 * [`VacantEntry::into_key`]
879 (https://doc.rust-lang.org/std/collections/btree_map/struct.VacantEntry.html#method.into_key)
884 * [The `format!` macro and friends now allow a single argument to be formatted
886 (https://github.com/rust-lang/rust/pull/33642)
887 * [The lifetime bounds on `[T]::binary_search_by` and
888 `[T]::binary_search_by_key` have been adjusted to be more flexible]
889 (https://github.com/rust-lang/rust/pull/34762)
890 * [`Option` implements `From` for its contained type]
891 (https://github.com/rust-lang/rust/pull/34828)
892 * [`Cell`, `RefCell` and `UnsafeCell` implement `From` for their contained type]
893 (https://github.com/rust-lang/rust/pull/35392)
894 * [`RwLock` panics if the reader count overflows]
895 (https://github.com/rust-lang/rust/pull/35378)
896 * [`vec_deque::Drain`, `hash_map::Drain` and `hash_set::Drain` are covariant]
897 (https://github.com/rust-lang/rust/pull/35354)
898 * [`vec::Drain` and `binary_heap::Drain` are covariant]
899 (https://github.com/rust-lang/rust/pull/34951)
900 * [`Cow<str>` implements `FromIterator` for `char`, `&str` and `String`]
901 (https://github.com/rust-lang/rust/pull/35064)
902 * [Sockets on Linux are correctly closed in subprocesses via `SOCK_CLOEXEC`]
903 (https://github.com/rust-lang/rust/pull/34946)
904 * [`hash_map::Entry`, `hash_map::VacantEntry` and `hash_map::OccupiedEntry`
906 (https://github.com/rust-lang/rust/pull/34937)
907 * [`btree_map::Entry`, `btree_map::VacantEntry` and `btree_map::OccupiedEntry`
909 (https://github.com/rust-lang/rust/pull/34885)
910 * [`String` implements `AddAssign`]
911 (https://github.com/rust-lang/rust/pull/34890)
912 * [Variadic `extern fn` pointers implement the `Clone`, `PartialEq`, `Eq`,
913 `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and `fmt::Debug` traits]
914 (https://github.com/rust-lang/rust/pull/34879)
915 * [`FileType` implements `Debug`]
916 (https://github.com/rust-lang/rust/pull/34757)
917 * [References to `Mutex` and `RwLock` are unwind-safe]
918 (https://github.com/rust-lang/rust/pull/34756)
919 * [`mpsc::sync_channel` `Receiver`s return any available message before
920 reporting a disconnect]
921 (https://github.com/rust-lang/rust/pull/34731)
922 * [Unicode definitions have been updated to 9.0]
923 (https://github.com/rust-lang/rust/pull/34599)
924 * [`env` iterators implement `DoubleEndedIterator`]
925 (https://github.com/rust-lang/rust/pull/33312)
930 * [Support local mirrors of registries]
931 (https://github.com/rust-lang/cargo/pull/2857)
932 * [Add support for command aliases]
933 (https://github.com/rust-lang/cargo/pull/2679)
934 * [Allow `opt-level="s"` / `opt-level="z"` in profile overrides]
935 (https://github.com/rust-lang/cargo/pull/3007)
936 * [Make `cargo doc --open --target` work as expected]
937 (https://github.com/rust-lang/cargo/pull/2988)
938 * [Speed up noop registry updates]
939 (https://github.com/rust-lang/cargo/pull/2974)
941 (https://github.com/rust-lang/cargo/pull/2971)
942 * [Fix `--panic=abort` with plugins]
943 (https://github.com/rust-lang/cargo/pull/2954)
944 * [Always pass `-C metadata` to the compiler]
945 (https://github.com/rust-lang/cargo/pull/2946)
946 * [Fix depending on git repos with workspaces]
947 (https://github.com/rust-lang/cargo/pull/2938)
948 * [Add a `--lib` flag to `cargo new`]
949 (https://github.com/rust-lang/cargo/pull/2921)
950 * [Add `http.cainfo` for custom certs]
951 (https://github.com/rust-lang/cargo/pull/2917)
952 * [Indicate the compilation profile after compiling]
953 (https://github.com/rust-lang/cargo/pull/2909)
954 * [Allow enabling features for dependencies with `--features`]
955 (https://github.com/rust-lang/cargo/pull/2876)
956 * [Add `--jobs` flag to `cargo package`]
957 (https://github.com/rust-lang/cargo/pull/2867)
958 * [Add `--dry-run` to `cargo publish`]
959 (https://github.com/rust-lang/cargo/pull/2849)
960 * [Add support for `RUSTDOCFLAGS`]
961 (https://github.com/rust-lang/cargo/pull/2794)
966 * [`panic::catch_unwind` is more optimized]
967 (https://github.com/rust-lang/rust/pull/35444)
968 * [`panic::catch_unwind` no longer accesses thread-local storage on entry]
969 (https://github.com/rust-lang/rust/pull/34866)
974 * [Test binaries now support a `--test-threads` argument to specify the number
975 of threads used to run tests, and which acts the same as the
976 `RUST_TEST_THREADS` environment variable]
977 (https://github.com/rust-lang/rust/pull/35414)
978 * [The test runner now emits a warning when tests run over 60 seconds]
979 (https://github.com/rust-lang/rust/pull/35405)
980 * [rustdoc: Fix methods in search results]
981 (https://github.com/rust-lang/rust/pull/34752)
982 * [`rust-lldb` warns about unsupported versions of LLDB]
983 (https://github.com/rust-lang/rust/pull/34646)
984 * [Rust releases now come with source packages that can be installed by rustup
985 via `rustup component add rust-src`]
986 (https://github.com/rust-lang/rust/pull/34366).
987 The resulting source code can be used by tools and IDES, located in the
988 sysroot under `lib/rustlib/src`.
993 * [The compiler can now be built against LLVM 3.9]
994 (https://github.com/rust-lang/rust/pull/35594)
995 * Many minor improvements to the documentation.
996 * [The Rust exception handling "personality" routine is now written in Rust]
997 (https://github.com/rust-lang/rust/pull/34832)
1002 * [When printing Windows `OsStr`s, unpaired surrogate codepoints are escaped
1003 with the lowercase format instead of the uppercase]
1004 (https://github.com/rust-lang/rust/pull/35084)
1005 * [When formatting strings, if "precision" is specified, the "fill",
1006 "align" and "width" specifiers are no longer ignored]
1007 (https://github.com/rust-lang/rust/pull/34544)
1008 * [The `Debug` impl for strings no longer escapes all non-ASCII characters]
1009 (https://github.com/rust-lang/rust/pull/34485)
1012 Version 1.11.0 (2016-08-18)
1013 ===========================
1018 * [`cfg_attr` works on `path` attributes]
1019 (https://github.com/rust-lang/rust/pull/34546)
1020 * [Support nested `cfg_attr` attributes]
1021 (https://github.com/rust-lang/rust/pull/34216)
1022 * [Allow statement-generating braced macro invocations at the end of blocks]
1023 (https://github.com/rust-lang/rust/pull/34436)
1024 * [Macros can be expanded inside of trait definitions]
1025 (https://github.com/rust-lang/rust/pull/34213)
1026 * [`#[macro_use]` works properly when it is itself expanded from a macro]
1027 (https://github.com/rust-lang/rust/pull/34032)
1032 * [`BinaryHeap::append`]
1033 (https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.append)
1034 * [`BTreeMap::append`]
1035 (https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.append)
1036 * [`BTreeMap::split_off`]
1037 (https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.split_off)
1038 * [`BTreeSet::append`]
1039 (https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.append)
1040 * [`BTreeSet::split_off`]
1041 (https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.split_off)
1042 * [`f32::to_degrees`]
1043 (https://doc.rust-lang.org/std/primitive.f32.html#method.to_degrees)
1044 (in libcore - previously stabilized in libstd)
1045 * [`f32::to_radians`]
1046 (https://doc.rust-lang.org/std/primitive.f32.html#method.to_radians)
1047 (in libcore - previously stabilized in libstd)
1048 * [`f64::to_degrees`]
1049 (https://doc.rust-lang.org/std/primitive.f64.html#method.to_degrees)
1050 (in libcore - previously stabilized in libstd)
1051 * [`f64::to_radians`]
1052 (https://doc.rust-lang.org/std/primitive.f64.html#method.to_radians)
1053 (in libcore - previously stabilized in libstd)
1055 (https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
1056 * [`Iterator::product`]
1057 (https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
1059 (https://doc.rust-lang.org/std/cell/struct.Cell.html#method.get_mut)
1060 * [`RefCell::get_mut`]
1061 (https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.get_mut)
1066 * [The `thread_local!` macro supports multiple definitions in a single
1067 invocation, and can apply attributes]
1068 (https://github.com/rust-lang/rust/pull/34077)
1069 * [`Cow` implements `Default`]
1070 (https://github.com/rust-lang/rust/pull/34305)
1071 * [`Wrapping` implements binary, octal, lower-hex and upper-hex
1072 `Display` formatting]
1073 (https://github.com/rust-lang/rust/pull/34190)
1074 * [The range types implement `Hash`]
1075 (https://github.com/rust-lang/rust/pull/34180)
1076 * [`lookup_host` ignores unknown address types]
1077 (https://github.com/rust-lang/rust/pull/34067)
1078 * [`assert_eq!` accepts a custom error message, like `assert!` does]
1079 (https://github.com/rust-lang/rust/pull/33976)
1080 * [The main thread is now called "main" instead of "<main>"]
1081 (https://github.com/rust-lang/rust/pull/33803)
1086 * [Disallow specifying features of transitive deps]
1087 (https://github.com/rust-lang/cargo/pull/2821)
1088 * [Add color support for Windows consoles]
1089 (https://github.com/rust-lang/cargo/pull/2804)
1090 * [Fix `harness = false` on `[lib]` sections]
1091 (https://github.com/rust-lang/cargo/pull/2795)
1092 * [Don't panic when `links` contains a '.']
1093 (https://github.com/rust-lang/cargo/pull/2787)
1094 * [Build scripts can emit warnings]
1095 (https://github.com/rust-lang/cargo/pull/2630),
1096 and `-vv` prints warnings for all crates.
1097 * [Ignore file locks on OS X NFS mounts]
1098 (https://github.com/rust-lang/cargo/pull/2720)
1099 * [Don't warn about `package.metadata` keys]
1100 (https://github.com/rust-lang/cargo/pull/2668).
1101 This provides room for expansion by arbitrary tools.
1102 * [Add support for cdylib crate types]
1103 (https://github.com/rust-lang/cargo/pull/2741)
1104 * [Prevent publishing crates when files are dirty]
1105 (https://github.com/rust-lang/cargo/pull/2781)
1106 * [Don't fetch all crates on clean]
1107 (https://github.com/rust-lang/cargo/pull/2704)
1108 * [Propagate --color option to rustc]
1109 (https://github.com/rust-lang/cargo/pull/2779)
1110 * [Fix `cargo doc --open` on Windows]
1111 (https://github.com/rust-lang/cargo/pull/2780)
1112 * [Improve autocompletion]
1113 (https://github.com/rust-lang/cargo/pull/2772)
1114 * [Configure colors of stderr as well as stdout]
1115 (https://github.com/rust-lang/cargo/pull/2739)
1120 * [Caching projections speeds up type check dramatically for some
1122 (https://github.com/rust-lang/rust/pull/33816)
1123 * [The default `HashMap` hasher is SipHash 1-3 instead of SipHash 2-4]
1124 (https://github.com/rust-lang/rust/pull/33940)
1125 This hasher is faster, but is believed to provide sufficient
1126 protection from collision attacks.
1127 * [Comparison of `Ipv4Addr` is 10x faster]
1128 (https://github.com/rust-lang/rust/pull/33891)
1133 * [Fix empty implementation section on some module pages]
1134 (https://github.com/rust-lang/rust/pull/34536)
1135 * [Fix inlined renamed reexports in import lists]
1136 (https://github.com/rust-lang/rust/pull/34479)
1137 * [Fix search result layout for enum variants and struct fields]
1138 (https://github.com/rust-lang/rust/pull/34477)
1139 * [Fix issues with source links to external crates]
1140 (https://github.com/rust-lang/rust/pull/34387)
1141 * [Fix redirect pages for renamed reexports]
1142 (https://github.com/rust-lang/rust/pull/34245)
1147 * [rustc is better at finding the MSVC toolchain]
1148 (https://github.com/rust-lang/rust/pull/34492)
1149 * [When emitting debug info, rustc emits frame pointers for closures,
1150 shims and glue, as it does for all other functions]
1151 (https://github.com/rust-lang/rust/pull/33909)
1152 * [rust-lldb warns about unsupported versions of LLDB]
1153 (https://github.com/rust-lang/rust/pull/34646)
1154 * Many more errors have been given error codes and extended
1156 * API documentation continues to be improved, with many new examples
1161 * [rustc no longer hangs when dependencies recursively re-export
1163 (https://github.com/rust-lang/rust/pull/34542)
1164 * [rustc requires LLVM 3.7+]
1165 (https://github.com/rust-lang/rust/pull/34104)
1166 * [The 'How Safe and Unsafe Interact' chapter of The Rustonomicon was
1168 (https://github.com/rust-lang/rust/pull/33895)
1169 * [rustc support 16-bit pointer sizes]
1170 (https://github.com/rust-lang/rust/pull/33460).
1171 No targets use this yet, but it works toward AVR support.
1176 * [`const`s and `static`s may not have unsized types]
1177 (https://github.com/rust-lang/rust/pull/34443)
1178 * [The new follow-set rules that place restrictions on `macro_rules!`
1179 in order to ensure syntax forward-compatibility have been enabled]
1180 (https://github.com/rust-lang/rust/pull/33982)
1181 This was an [ammendment to RFC 550]
1182 (https://github.com/rust-lang/rfcs/pull/1384),
1183 and has been a warning since 1.10.
1184 * [`cfg` attribute process has been refactored to fix various bugs]
1185 (https://github.com/rust-lang/rust/pull/33706).
1186 This causes breakage in some corner cases.
1189 Version 1.10.0 (2016-07-07)
1190 ===========================
1195 * [Allow `concat_idents!` in type positions as well as in expression
1197 (https://github.com/rust-lang/rust/pull/33735).
1198 * [`Copy` types are required to have a trivial implementation of `Clone`]
1199 (https://github.com/rust-lang/rust/pull/33420).
1200 [RFC 1521](https://github.com/rust-lang/rfcs/blob/master/text/1521-copy-clone-semantics.md).
1201 * [Single-variant enums support the `#[repr(..)]` attribute]
1202 (https://github.com/rust-lang/rust/pull/33355).
1203 * [Fix `#[derive(RustcEncodable)]` in the presence of other `encode` methods]
1204 (https://github.com/rust-lang/rust/pull/32908).
1205 * [`panic!` can be converted to a runtime abort with the
1206 `-C panic=abort` flag]
1207 (https://github.com/rust-lang/rust/pull/32900).
1208 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
1209 * [Add a new crate type, 'cdylib']
1210 (https://github.com/rust-lang/rust/pull/33553).
1211 cdylibs are dynamic libraries suitable for loading by non-Rust hosts.
1212 [RFC 1510](https://github.com/rust-lang/rfcs/blob/master/text/1510-rdylib.md).
1213 Note that Cargo does not yet directly support cdylibs.
1218 * `os::windows::fs::OpenOptionsExt::access_mode`
1219 * `os::windows::fs::OpenOptionsExt::share_mode`
1220 * `os::windows::fs::OpenOptionsExt::custom_flags`
1221 * `os::windows::fs::OpenOptionsExt::attributes`
1222 * `os::windows::fs::OpenOptionsExt::security_qos_flags`
1223 * `os::unix::fs::OpenOptionsExt::custom_flags`
1224 * [`sync::Weak::new`]
1225 (http://doc.rust-lang.org/alloc/arc/struct.Weak.html#method.new)
1226 * `Default for sync::Weak`
1227 * [`panic::set_hook`]
1228 (http://doc.rust-lang.org/std/panic/fn.set_hook.html)
1229 * [`panic::take_hook`]
1230 (http://doc.rust-lang.org/std/panic/fn.take_hook.html)
1231 * [`panic::PanicInfo`]
1232 (http://doc.rust-lang.org/std/panic/struct.PanicInfo.html)
1233 * [`panic::PanicInfo::payload`]
1234 (http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.payload)
1235 * [`panic::PanicInfo::location`]
1236 (http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.location)
1237 * [`panic::Location`]
1238 (http://doc.rust-lang.org/std/panic/struct.Location.html)
1239 * [`panic::Location::file`]
1240 (http://doc.rust-lang.org/std/panic/struct.Location.html#method.file)
1241 * [`panic::Location::line`]
1242 (http://doc.rust-lang.org/std/panic/struct.Location.html#method.line)
1243 * [`ffi::CStr::from_bytes_with_nul`]
1244 (http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul)
1245 * [`ffi::CStr::from_bytes_with_nul_unchecked`]
1246 (http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul_unchecked)
1247 * [`ffi::FromBytesWithNulError`]
1248 (http://doc.rust-lang.org/std/ffi/struct.FromBytesWithNulError.html)
1249 * [`fs::Metadata::modified`]
1250 (http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.modified)
1251 * [`fs::Metadata::accessed`]
1252 (http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.accessed)
1253 * [`fs::Metadata::created`]
1254 (http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.created)
1255 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange`
1256 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange_weak`
1257 * `collections::{btree,hash}_map::{Occupied,Vacant,}Entry::key`
1258 * `os::unix::net::{UnixStream, UnixListener, UnixDatagram, SocketAddr}`
1259 * [`SocketAddr::is_unnamed`]
1260 (http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.is_unnamed)
1261 * [`SocketAddr::as_pathname`]
1262 (http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.as_pathname)
1263 * [`UnixStream::connect`]
1264 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.connect)
1265 * [`UnixStream::pair`]
1266 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.pair)
1267 * [`UnixStream::try_clone`]
1268 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.try_clone)
1269 * [`UnixStream::local_addr`]
1270 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.local_addr)
1271 * [`UnixStream::peer_addr`]
1272 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.peer_addr)
1273 * [`UnixStream::set_read_timeout`]
1274 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
1275 * [`UnixStream::set_write_timeout`]
1276 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
1277 * [`UnixStream::read_timeout`]
1278 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
1279 * [`UnixStream::write_timeout`]
1280 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
1281 * [`UnixStream::set_nonblocking`]
1282 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.set_nonblocking)
1283 * [`UnixStream::take_error`]
1284 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.take_error)
1285 * [`UnixStream::shutdown`]
1286 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.shutdown)
1287 * Read/Write/RawFd impls for `UnixStream`
1288 * [`UnixListener::bind`]
1289 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.bind)
1290 * [`UnixListener::accept`]
1291 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.accept)
1292 * [`UnixListener::try_clone`]
1293 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.try_clone)
1294 * [`UnixListener::local_addr`]
1295 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.local_addr)
1296 * [`UnixListener::set_nonblocking`]
1297 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.set_nonblocking)
1298 * [`UnixListener::take_error`]
1299 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.take_error)
1300 * [`UnixListener::incoming`]
1301 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.incoming)
1302 * RawFd impls for `UnixListener`
1303 * [`UnixDatagram::bind`]
1304 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.bind)
1305 * [`UnixDatagram::unbound`]
1306 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.unbound)
1307 * [`UnixDatagram::pair`]
1308 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.pair)
1309 * [`UnixDatagram::connect`]
1310 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.connect)
1311 * [`UnixDatagram::try_clone`]
1312 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.try_clone)
1313 * [`UnixDatagram::local_addr`]
1314 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.local_addr)
1315 * [`UnixDatagram::peer_addr`]
1316 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.peer_addr)
1317 * [`UnixDatagram::recv_from`]
1318 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv_from)
1319 * [`UnixDatagram::recv`]
1320 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv)
1321 * [`UnixDatagram::send_to`]
1322 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send_to)
1323 * [`UnixDatagram::send`]
1324 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send)
1325 * [`UnixDatagram::set_read_timeout`]
1326 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_read_timeout)
1327 * [`UnixDatagram::set_write_timeout`]
1328 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_write_timeout)
1329 * [`UnixDatagram::read_timeout`]
1330 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.read_timeout)
1331 * [`UnixDatagram::write_timeout`]
1332 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.write_timeout)
1333 * [`UnixDatagram::set_nonblocking`]
1334 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_nonblocking)
1335 * [`UnixDatagram::take_error`]
1336 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.take_error)
1337 * [`UnixDatagram::shutdown`]
1338 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.shutdown)
1339 * RawFd impls for `UnixDatagram`
1340 * `{BTree,Hash}Map::values_mut`
1341 * [`<[_]>::binary_search_by_key`]
1342 (http://doc.rust-lang.org/beta/std/primitive.slice.html#method.binary_search_by_key)
1347 * [The `abs_sub` method of floats is deprecated]
1348 (https://github.com/rust-lang/rust/pull/33664).
1349 The semantics of this minor method are subtle and probably not what
1351 * [Add implementation of Ord for Cell<T> and RefCell<T> where T: Ord]
1352 (https://github.com/rust-lang/rust/pull/33306).
1353 * [On Linux, if `HashMap`s can't be initialized with `getrandom` they
1354 will fall back to `/dev/urandom` temporarily to avoid blocking
1356 (https://github.com/rust-lang/rust/pull/33086).
1357 * [Implemented negation for wrapping numerals]
1358 (https://github.com/rust-lang/rust/pull/33067).
1359 * [Implement `Clone` for `binary_heap::IntoIter`]
1360 (https://github.com/rust-lang/rust/pull/33050).
1361 * [Implement `Display` and `Hash` for `std::num::Wrapping`]
1362 (https://github.com/rust-lang/rust/pull/33023).
1363 * [Add `Default` implementation for `&CStr`, `CString`]
1364 (https://github.com/rust-lang/rust/pull/32990).
1365 * [Implement `From<Vec<T>>` and `Into<Vec<T>>` for `VecDeque<T>`]
1366 (https://github.com/rust-lang/rust/pull/32866).
1367 * [Implement `Default` for `UnsafeCell`, `fmt::Error`, `Condvar`,
1369 (https://github.com/rust-lang/rust/pull/32785).
1373 * [Cargo.toml supports the `profile.*.panic` option]
1374 (https://github.com/rust-lang/cargo/pull/2687).
1375 This controls the runtime behavior of the `panic!` macro
1376 and can be either "unwind" (the default), or "abort".
1377 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
1378 * [Don't throw away errors with `-p` arguments]
1379 (https://github.com/rust-lang/cargo/pull/2723).
1380 * [Report status to stderr instead of stdout]
1381 (https://github.com/rust-lang/cargo/pull/2693).
1382 * [Build scripts are passed a `CARGO_MANIFEST_LINKS` environment
1383 variable that corresponds to the `links` field of the manifest]
1384 (https://github.com/rust-lang/cargo/pull/2710).
1385 * [Ban keywords from crate names]
1386 (https://github.com/rust-lang/cargo/pull/2707).
1387 * [Canonicalize `CARGO_HOME` on Windows]
1388 (https://github.com/rust-lang/cargo/pull/2604).
1389 * [Retry network requests]
1390 (https://github.com/rust-lang/cargo/pull/2396).
1391 By default they are retried twice, which can be customized with the
1392 `net.retry` value in `.cargo/config`.
1393 * [Don't print extra error info for failing subcommands]
1394 (https://github.com/rust-lang/cargo/pull/2674).
1395 * [Add `--force` flag to `cargo install`]
1396 (https://github.com/rust-lang/cargo/pull/2405).
1397 * [Don't use `flock` on NFS mounts]
1398 (https://github.com/rust-lang/cargo/pull/2623).
1399 * [Prefer building `cargo install` artifacts in temporary directories]
1400 (https://github.com/rust-lang/cargo/pull/2610).
1401 Makes it possible to install multiple crates in parallel.
1402 * [Add `cargo test --doc`]
1403 (https://github.com/rust-lang/cargo/pull/2578).
1404 * [Add `cargo --explain`]
1405 (https://github.com/rust-lang/cargo/pull/2551).
1406 * [Don't print warnings when `-q` is passed]
1407 (https://github.com/rust-lang/cargo/pull/2576).
1408 * [Add `cargo doc --lib` and `--bin`]
1409 (https://github.com/rust-lang/cargo/pull/2577).
1410 * [Don't require build script output to be UTF-8]
1411 (https://github.com/rust-lang/cargo/pull/2560).
1412 * [Correctly attempt multiple git usernames]
1413 (https://github.com/rust-lang/cargo/pull/2584).
1418 * [rustc memory usage was reduced by refactoring the context used for
1420 (https://github.com/rust-lang/rust/pull/33425).
1421 * [Speed up creation of `HashMap`s by caching the random keys used
1422 to initialize the hash state]
1423 (https://github.com/rust-lang/rust/pull/33318).
1424 * [The `find` implementation for `Chain` iterators is 2x faster]
1425 (https://github.com/rust-lang/rust/pull/33289).
1426 * [Trait selection optimizations speed up type checking by 15%]
1427 (https://github.com/rust-lang/rust/pull/33138).
1428 * [Efficient trie lookup for boolean Unicode properties]
1429 (https://github.com/rust-lang/rust/pull/33098).
1430 10x faster than the previous lookup tables.
1431 * [Special case `#[derive(Copy, Clone)]` to avoid bloat]
1432 (https://github.com/rust-lang/rust/pull/31414).
1437 * Many incremental improvements to documentation and rustdoc.
1438 * [rustdoc: List blanket trait impls]
1439 (https://github.com/rust-lang/rust/pull/33514).
1440 * [rustdoc: Clean up ABI rendering]
1441 (https://github.com/rust-lang/rust/pull/33151).
1442 * [Indexing with the wrong type produces a more informative error]
1443 (https://github.com/rust-lang/rust/pull/33401).
1444 * [Improve diagnostics for constants being used in irrefutable patterns]
1445 (https://github.com/rust-lang/rust/pull/33406).
1446 * [When many method candidates are in scope limit the suggestions to 10]
1447 (https://github.com/rust-lang/rust/pull/33338).
1448 * [Remove confusing suggestion when calling a `fn` type]
1449 (https://github.com/rust-lang/rust/pull/33325).
1450 * [Do not suggest changing `&mut self` to `&mut mut self`]
1451 (https://github.com/rust-lang/rust/pull/33319).
1456 * [Update i686-linux-android features to match Android ABI]
1457 (https://github.com/rust-lang/rust/pull/33651).
1458 * [Update aarch64-linux-android features to match Android ABI]
1459 (https://github.com/rust-lang/rust/pull/33500).
1460 * [`std` no longer prints backtraces on platforms where the running
1461 module must be loaded with `env::current_exe`, which can't be relied
1462 on](https://github.com/rust-lang/rust/pull/33554).
1463 * This release includes std binaries for the i586-unknown-linux-gnu,
1464 i686-unknown-linux-musl, and armv7-linux-androideabi targets. The
1465 i586 target is for old x86 hardware without SSE2, and the armv7
1466 target is for Android running on modern ARM architectures.
1467 * [The `rust-gdb` and `rust-lldb` scripts are distributed on all
1468 Unix platforms](https://github.com/rust-lang/rust/pull/32835).
1469 * [On Unix the runtime aborts by calling `libc::abort` instead of
1470 generating an illegal instruction]
1471 (https://github.com/rust-lang/rust/pull/31457).
1472 * [Rust is now bootstrapped from the previous release of Rust,
1473 instead of a snapshot from an arbitrary commit]
1474 (https://github.com/rust-lang/rust/pull/32942).
1479 * [`AtomicBool` is now bool-sized, not word-sized]
1480 (https://github.com/rust-lang/rust/pull/33579).
1481 * [`target_env` for Linux ARM targets is just `gnu`, not
1482 `gnueabihf`, `gnueabi`, etc]
1483 (https://github.com/rust-lang/rust/pull/33403).
1484 * [Consistently panic on overflow in `Duration::new`]
1485 (https://github.com/rust-lang/rust/pull/33072).
1486 * [Change `String::truncate` to panic less]
1487 (https://github.com/rust-lang/rust/pull/32977).
1488 * [Add `:block` to the follow set for `:ty` and `:path`]
1489 (https://github.com/rust-lang/rust/pull/32945).
1490 Affects how macros are parsed.
1491 * [Fix macro hygiene bug]
1492 (https://github.com/rust-lang/rust/pull/32923).
1493 * [Feature-gated attributes on macro-generated macro invocations are
1495 (https://github.com/rust-lang/rust/pull/32791).
1496 * [Suppress fallback and ambiguity errors during type inference]
1497 (https://github.com/rust-lang/rust/pull/32258).
1498 This caused some minor changes to type inference.
1501 Version 1.9.0 (2016-05-26)
1502 ==========================
1507 * The `#[deprecated]` attribute when applied to an API will generate
1508 warnings when used. The warnings may be suppressed with
1509 `#[allow(deprecated)]`. [RFC 1270].
1510 * [`fn` item types are zero sized, and each `fn` names a unique
1511 type][1.9fn]. This will break code that transmutes `fn`s, so calling
1512 `transmute` on a `fn` type will generate a warning for a few cycles,
1513 then will be converted to an error.
1514 * [Field and method resolution understand visibility, so private
1515 fields and methods cannot prevent the proper use of public fields
1516 and methods][1.9fv].
1517 * [The parser considers unicode codepoints in the
1518 `PATTERN_WHITE_SPACE` category to be whitespace][1.9ws].
1524 * [`std::panic::catch_unwind`][] (renamed from `recover`)
1525 * [`std::panic::resume_unwind`][] (renamed from `propagate`)
1526 * [`std::panic::AssertUnwindSafe`][] (renamed from `AssertRecoverSafe`)
1527 * [`std::panic::UnwindSafe`][] (renamed from `RecoverSafe`)
1528 * [`str::is_char_boundary`]
1529 * [`<*const T>::as_ref`]
1530 * [`<*mut T>::as_ref`]
1531 * [`<*mut T>::as_mut`]
1532 * [`AsciiExt::make_ascii_uppercase`]
1533 * [`AsciiExt::make_ascii_lowercase`]
1534 * [`char::decode_utf16`]
1535 * [`char::DecodeUtf16`]
1536 * [`char::DecodeUtf16Error`]
1537 * [`char::DecodeUtf16Error::unpaired_surrogate`]
1538 * [`BTreeSet::take`]
1539 * [`BTreeSet::replace`]
1542 * [`HashSet::replace`]
1544 * [`OsString::with_capacity`]
1545 * [`OsString::clear`]
1546 * [`OsString::capacity`]
1547 * [`OsString::reserve`]
1548 * [`OsString::reserve_exact`]
1549 * [`OsStr::is_empty`]
1551 * [`std::os::unix::thread`]
1554 * [`JoinHandleExt::as_pthread_t`]
1555 * [`JoinHandleExt::into_pthread_t`]
1556 * [`HashSet::hasher`]
1557 * [`HashMap::hasher`]
1558 * [`CommandExt::exec`]
1559 * [`File::try_clone`]
1560 * [`SocketAddr::set_ip`]
1561 * [`SocketAddr::set_port`]
1562 * [`SocketAddrV4::set_ip`]
1563 * [`SocketAddrV4::set_port`]
1564 * [`SocketAddrV6::set_ip`]
1565 * [`SocketAddrV6::set_port`]
1566 * [`SocketAddrV6::set_flowinfo`]
1567 * [`SocketAddrV6::set_scope_id`]
1568 * [`slice::copy_from_slice`]
1569 * [`ptr::read_volatile`]
1570 * [`ptr::write_volatile`]
1571 * [`OpenOptions::create_new`]
1572 * [`TcpStream::set_nodelay`]
1573 * [`TcpStream::nodelay`]
1574 * [`TcpStream::set_ttl`]
1575 * [`TcpStream::ttl`]
1576 * [`TcpStream::set_only_v6`]
1577 * [`TcpStream::only_v6`]
1578 * [`TcpStream::take_error`]
1579 * [`TcpStream::set_nonblocking`]
1580 * [`TcpListener::set_ttl`]
1581 * [`TcpListener::ttl`]
1582 * [`TcpListener::set_only_v6`]
1583 * [`TcpListener::only_v6`]
1584 * [`TcpListener::take_error`]
1585 * [`TcpListener::set_nonblocking`]
1586 * [`UdpSocket::set_broadcast`]
1587 * [`UdpSocket::broadcast`]
1588 * [`UdpSocket::set_multicast_loop_v4`]
1589 * [`UdpSocket::multicast_loop_v4`]
1590 * [`UdpSocket::set_multicast_ttl_v4`]
1591 * [`UdpSocket::multicast_ttl_v4`]
1592 * [`UdpSocket::set_multicast_loop_v6`]
1593 * [`UdpSocket::multicast_loop_v6`]
1594 * [`UdpSocket::set_multicast_ttl_v6`]
1595 * [`UdpSocket::multicast_ttl_v6`]
1596 * [`UdpSocket::set_ttl`]
1597 * [`UdpSocket::ttl`]
1598 * [`UdpSocket::set_only_v6`]
1599 * [`UdpSocket::only_v6`]
1600 * [`UdpSocket::join_multicast_v4`]
1601 * [`UdpSocket::join_multicast_v6`]
1602 * [`UdpSocket::leave_multicast_v4`]
1603 * [`UdpSocket::leave_multicast_v6`]
1604 * [`UdpSocket::take_error`]
1605 * [`UdpSocket::connect`]
1606 * [`UdpSocket::send`]
1607 * [`UdpSocket::recv`]
1608 * [`UdpSocket::set_nonblocking`]
1613 * [`std::sync::Once` is poisoned if its initialization function
1615 * [`cell::Ref` and `cell::RefMut` can contain unsized types][1.9cu].
1616 * [Most types implement `fmt::Debug`][1.9db].
1617 * [The default buffer size used by `BufReader` and `BufWriter` was
1618 reduced to 8K, from 64K][1.9bf]. This is in line with the buffer size
1619 used by other languages.
1620 * [`Instant`, `SystemTime` and `Duration` implement `+=` and `-=`.
1621 `Duration` additionally implements `*=` and `/=`][1.9ta].
1622 * [`Skip` is a `DoubleEndedIterator`][1.9sk].
1623 * [`From<[u8; 4]>` is implemented for `Ipv4Addr`][1.9fi].
1624 * [`Chain` implements `BufRead`][1.9ch].
1625 * [`HashMap`, `HashSet` and iterators are covariant][1.9hc].
1630 * [Cargo can now run concurrently][1.9cc].
1631 * [Top-level overrides allow specific revisions of crates to be
1632 overridden through the entire crate graph][1.9ct]. This is intended
1633 to make upgrades easier for large projects, by allowing crates to be
1634 forked temporarily until they've been upgraded and republished.
1635 * [Cargo exports a `CARGO_PKG_AUTHORS` environment variable][1.9cp].
1636 * [Cargo will pass the contents of the `RUSTFLAGS` variable to `rustc`
1637 on the commandline][1.9cf]. `rustc` arguments can also be specified
1638 in the `build.rustflags` configuration key.
1643 * [The time complexity of comparing variables for equivalence during type
1644 unification is reduced from _O_(_n_!) to _O_(_n_)][1.9tu]. This leads
1645 to major compilation time improvement in some scenarios.
1646 * [`ToString` is specialized for `str`, giving it the same performance
1647 as `to_owned`][1.9ts].
1648 * [Spawning processes with `Command::output` no longer creates extra
1650 * [`#[derive(PartialEq)]` and `#[derive(PartialOrd)]` emit less code
1651 for C-like enums][1.9cl].
1656 * [Passing the `--quiet` flag to a test runner will produce
1657 much-abbreviated output][1.9q].
1658 * The Rust Project now publishes std binaries for the
1659 `mips-unknown-linux-musl`, `mipsel-unknown-linux-musl`, and
1660 `i586-pc-windows-msvc` targets.
1665 * [`std::sync::Once` is poisoned if its initialization function
1667 * [It is illegal to define methods with the same name in overlapping
1668 inherent `impl` blocks][1.9sn].
1669 * [`fn` item types are zero sized, and each `fn` names a unique
1670 type][1.9fn]. This will break code that transmutes `fn`s, so calling
1671 `transmute` on a `fn` type will generate a warning for a few cycles,
1672 then will be converted to an error.
1673 * [Improvements to const evaluation may trigger new errors when integer
1674 literals are out of range][1.9ce].
1677 [1.9bf]: https://github.com/rust-lang/rust/pull/32695
1678 [1.9cc]: https://github.com/rust-lang/cargo/pull/2486
1679 [1.9ce]: https://github.com/rust-lang/rust/pull/30587
1680 [1.9cf]: https://github.com/rust-lang/cargo/pull/2241
1681 [1.9ch]: https://github.com/rust-lang/rust/pull/32541
1682 [1.9cl]: https://github.com/rust-lang/rust/pull/31977
1683 [1.9cp]: https://github.com/rust-lang/cargo/pull/2465
1684 [1.9ct]: https://github.com/rust-lang/cargo/pull/2385
1685 [1.9cu]: https://github.com/rust-lang/rust/pull/32652
1686 [1.9db]: https://github.com/rust-lang/rust/pull/32054
1687 [1.9fi]: https://github.com/rust-lang/rust/pull/32050
1688 [1.9fn]: https://github.com/rust-lang/rust/pull/31710
1689 [1.9fv]: https://github.com/rust-lang/rust/pull/31938
1690 [1.9hc]: https://github.com/rust-lang/rust/pull/32635
1691 [1.9o]: https://github.com/rust-lang/rust/pull/32325
1692 [1.9q]: https://github.com/rust-lang/rust/pull/31887
1693 [1.9sk]: https://github.com/rust-lang/rust/pull/31700
1694 [1.9sn]: https://github.com/rust-lang/rust/pull/31925
1695 [1.9sp]: https://github.com/rust-lang/rust/pull/31618
1696 [1.9ta]: https://github.com/rust-lang/rust/pull/32448
1697 [1.9ts]: https://github.com/rust-lang/rust/pull/32586
1698 [1.9tu]: https://github.com/rust-lang/rust/pull/32062
1699 [1.9ws]: https://github.com/rust-lang/rust/pull/29734
1700 [RFC 1270]: https://github.com/rust-lang/rfcs/blob/master/text/1270-deprecation.md
1701 [`<*const T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
1702 [`<*mut T>::as_mut`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_mut
1703 [`<*mut T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
1704 [`slice::copy_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.copy_from_slice
1705 [`AsciiExt::make_ascii_lowercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_lowercase
1706 [`AsciiExt::make_ascii_uppercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_uppercase
1707 [`BTreeSet::get`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.get
1708 [`BTreeSet::replace`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.replace
1709 [`BTreeSet::take`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.take
1710 [`CommandExt::exec`]: http://doc.rust-lang.org/nightly/std/os/unix/process/trait.CommandExt.html#tymethod.exec
1711 [`File::try_clone`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html#method.try_clone
1712 [`HashMap::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.hasher
1713 [`HashSet::get`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.get
1714 [`HashSet::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.hasher
1715 [`HashSet::replace`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.replace
1716 [`HashSet::take`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.take
1717 [`JoinHandleExt::as_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.as_pthread_t
1718 [`JoinHandleExt::into_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.into_pthread_t
1719 [`JoinHandleExt`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html
1720 [`OpenOptions::create_new`]: http://doc.rust-lang.org/nightly/std/fs/struct.OpenOptions.html#method.create_new
1721 [`OsStr::is_empty`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.is_empty
1722 [`OsStr::len`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.len
1723 [`OsString::capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.capacity
1724 [`OsString::clear`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.clear
1725 [`OsString::reserve_exact`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve_exact
1726 [`OsString::reserve`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve
1727 [`OsString::with_capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.with_capacity
1728 [`RawPthread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/type.RawPthread.html
1729 [`SocketAddr::set_ip`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_ip
1730 [`SocketAddr::set_port`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_port
1731 [`SocketAddrV4::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_ip
1732 [`SocketAddrV4::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_port
1733 [`SocketAddrV6::set_flowinfo`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_flowinfo
1734 [`SocketAddrV6::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_ip
1735 [`SocketAddrV6::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_port
1736 [`SocketAddrV6::set_scope_id`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_scope_id
1737 [`TcpListener::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
1738 [`TcpListener::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
1739 [`TcpListener::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
1740 [`TcpListener::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
1741 [`TcpListener::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
1742 [`TcpListener::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
1743 [`TcpStream::nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.nodelay
1744 [`TcpStream::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
1745 [`TcpStream::set_nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nodelay
1746 [`TcpStream::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
1747 [`TcpStream::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
1748 [`TcpStream::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
1749 [`TcpStream::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
1750 [`TcpStream::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
1751 [`UdpSocket::broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.broadcast
1752 [`UdpSocket::connect`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.connect
1753 [`UdpSocket::join_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v4
1754 [`UdpSocket::join_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v6
1755 [`UdpSocket::leave_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v4
1756 [`UdpSocket::leave_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v6
1757 [`UdpSocket::multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v4
1758 [`UdpSocket::multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v6
1759 [`UdpSocket::multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v4
1760 [`UdpSocket::multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v6
1761 [`UdpSocket::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.only_v6
1762 [`UdpSocket::recv`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.recv
1763 [`UdpSocket::send`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.send
1764 [`UdpSocket::set_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_broadcast
1765 [`UdpSocket::set_multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v4
1766 [`UdpSocket::set_multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v6
1767 [`UdpSocket::set_multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v4
1768 [`UdpSocket::set_multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v6
1769 [`UdpSocket::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_nonblocking
1770 [`UdpSocket::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_only_v6
1771 [`UdpSocket::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_ttl
1772 [`UdpSocket::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.take_error
1773 [`UdpSocket::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.ttl
1774 [`char::DecodeUtf16Error::unpaired_surrogate`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html#method.unpaired_surrogate
1775 [`char::DecodeUtf16Error`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html
1776 [`char::DecodeUtf16`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16.html
1777 [`char::decode_utf16`]: http://doc.rust-lang.org/nightly/std/char/fn.decode_utf16.html
1778 [`ptr::read_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.read_volatile.html
1779 [`ptr::write_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.write_volatile.html
1780 [`std::os::unix::thread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/index.html
1781 [`std::panic::AssertUnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/struct.AssertUnwindSafe.html
1782 [`std::panic::UnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/trait.UnwindSafe.html
1783 [`std::panic::catch_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.catch_unwind.html
1784 [`std::panic::resume_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.resume_unwind.html
1785 [`std::panic`]: http://doc.rust-lang.org/nightly/std/panic/index.html
1786 [`str::is_char_boundary`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.is_char_boundary
1789 Version 1.8.0 (2016-04-14)
1790 ==========================
1795 * Rust supports overloading of compound assignment statements like
1796 `+=` by implementing the [`AddAssign`], [`SubAssign`],
1797 [`MulAssign`], [`DivAssign`], [`RemAssign`], [`BitAndAssign`],
1798 [`BitOrAssign`], [`BitXorAssign`], [`ShlAssign`], or [`ShrAssign`]
1800 * Empty structs can be defined with braces, as in `struct Foo { }`, in
1801 addition to the non-braced form, `struct Foo;`. [RFC 218].
1807 * [`str::encode_utf16`][] (renamed from `utf16_units`)
1808 * [`str::EncodeUtf16`][] (renamed from `Utf16Units`)
1811 * [`ptr::drop_in_place`]
1813 * [`time::SystemTime`]
1815 * [`Instant::duration_since`][] (renamed from `duration_from_earlier`)
1816 * [`Instant::elapsed`]
1817 * [`SystemTime::now`]
1818 * [`SystemTime::duration_since`][] (renamed from `duration_from_earlier`)
1819 * [`SystemTime::elapsed`]
1820 * Various `Add`/`Sub` impls for `Time` and `SystemTime`
1821 * [`SystemTimeError`]
1822 * [`SystemTimeError::duration`]
1823 * Various impls for `SystemTimeError`
1825 * [`AddAssign`], [`SubAssign`], [`MulAssign`], [`DivAssign`],
1826 [`RemAssign`], [`BitAndAssign`], [`BitOrAssign`],
1827 [`BitXorAssign`], [`ShlAssign`], [`ShrAssign`].
1828 * [The `write!` and `writeln!` macros correctly emit errors if any of
1829 their arguments can't be formatted][1.8w].
1830 * [Various I/O functions support large files on 32-bit Linux][1.8l].
1831 * [The Unix-specific `raw` modules, which contain a number of
1832 redefined C types are deprecated][1.8r], including `os::raw::unix`,
1833 `os::raw::macos`, and `os::raw::linux`. These modules defined types
1834 such as `ino_t` and `dev_t`. The inconsistency of these definitions
1835 across platforms was making it difficult to implement `std`
1836 correctly. Those that need these definitions should use the `libc`
1838 * The Unix-specific `MetadataExt` traits, including
1839 `os::unix::fs::MetadataExt`, which expose values such as inode
1840 numbers [no longer return platform-specific types][1.8r], but
1841 instead return widened integers. [RFC 1415].
1842 * [`btree_set::{IntoIter, Iter, Range}` are covariant][1.8cv].
1843 * [Atomic loads and stores are not volatile][1.8a].
1844 * [All types in `sync::mpsc` implement `fmt::Debug`][1.8mp].
1849 * [Inlining hash functions lead to a 3% compile-time improvement in
1850 some workloads][1.8h].
1851 * When using jemalloc, its symbols are [unprefixed so that it
1852 overrides the libc malloc implementation][1.8h]. This means that for
1853 rustc, LLVM is now using jemalloc, which results in a 6%
1854 compile-time improvement on a specific workload.
1855 * [Avoid quadratic growth in function size due to cleanups][1.8cu].
1860 * [32-bit MSVC builds finally implement unwinding][1.8ms].
1861 i686-pc-windows-msvc is now considered a tier-1 platform.
1862 * [The `--print targets` flag prints a list of supported targets][1.8t].
1863 * [The `--print cfg` flag prints the `cfg`s defined for the current
1865 * [`rustc` can be built with an new Cargo-based build system, written
1866 in Rust][1.8b]. It will eventually replace Rust's Makefile-based
1867 build system. To enable it configure with `configure --rustbuild`.
1868 * [Errors for non-exhaustive `match` patterns now list up to 3 missing
1869 variants while also indicating the total number of missing variants
1870 if more than 3][1.8m].
1871 * [Executable stacks are disabled on Linux and BSD][1.8nx].
1872 * The Rust Project now publishes binary releases of the standard
1873 library for a number of tier-2 targets:
1874 `armv7-unknown-linux-gnueabihf`, `powerpc-unknown-linux-gnu`,
1875 `powerpc64-unknown-linux-gnu`, `powerpc64le-unknown-linux-gnu`
1876 `x86_64-rumprun-netbsd`. These can be installed with
1877 tools such as [multirust][1.8mr].
1882 * [`cargo init` creates a new Cargo project in the current
1883 directory][1.8ci]. It is otherwise like `cargo new`.
1884 * [Cargo has configuration keys for `-v` and
1885 `--color`][1.8cc]. `verbose` and `color`, respectively, go in the
1886 `[term]` section of `.cargo/config`.
1887 * [Configuration keys that evaluate to strings or integers can be set
1888 via environment variables][1.8ce]. For example the `build.jobs` key
1889 can be set via `CARGO_BUILD_JOBS`. Environment variables take
1890 precedence over config files.
1891 * [Target-specific dependencies support Rust `cfg` syntax for
1892 describing targets][1.8cfg] so that dependencies for multiple
1893 targets can be specified together. [RFC 1361].
1894 * [The environment variables `CARGO_TARGET_ROOT`, `RUSTC`, and
1895 `RUSTDOC` take precedence over the `build.target-dir`,
1896 `build.rustc`, and `build.rustdoc` configuration values][1.8cv].
1897 * [The child process tree is killed on Windows when Cargo is
1899 * [The `build.target` configuration value sets the target platform,
1900 like `--target`][1.8ct].
1905 * [Unstable compiler flags have been further restricted][1.8u]. Since
1906 1.0 `-Z` flags have been considered unstable, and other flags that
1907 were considered unstable additionally required passing `-Z
1908 unstable-options` to access. Unlike unstable language and library
1909 features though, these options have been accessible on the stable
1910 release channel. Going forward, *new unstable flags will not be
1911 available on the stable release channel*, and old unstable flags
1912 will warn about their usage. In the future, all unstable flags will
1913 be unavailable on the stable release channel.
1914 * [It is no longer possible to `match` on empty enum variants using
1915 the `Variant(..)` syntax][1.8v]. This has been a warning since 1.6.
1916 * The Unix-specific `MetadataExt` traits, including
1917 `os::unix::fs::MetadataExt`, which expose values such as inode
1918 numbers [no longer return platform-specific types][1.8r], but
1919 instead return widened integers. [RFC 1415].
1920 * [Modules sourced from the filesystem cannot appear within arbitrary
1921 blocks, but only within other modules][1.8mf].
1922 * [`--cfg` compiler flags are parsed strictly as identifiers][1.8c].
1923 * On Unix, [stack overflow triggers a runtime abort instead of a
1925 * [`Command::spawn` and its equivalents return an error if any of
1926 its command-line arguments contain interior `NUL`s][1.8n].
1927 * [Tuple and unit enum variants from other crates are in the type
1929 * [On Windows `rustc` emits `.lib` files for the `staticlib` library
1930 type instead of `.a` files][1.8st]. Additionally, for the MSVC
1931 toolchain, `rustc` emits import libraries named `foo.dll.lib`
1932 instead of `foo.lib`.
1935 [1.8a]: https://github.com/rust-lang/rust/pull/30962
1936 [1.8b]: https://github.com/rust-lang/rust/pull/31123
1937 [1.8c]: https://github.com/rust-lang/rust/pull/31530
1938 [1.8cc]: https://github.com/rust-lang/cargo/pull/2397
1939 [1.8ce]: https://github.com/rust-lang/cargo/pull/2398
1940 [1.8cf]: https://github.com/rust-lang/rust/pull/31278
1941 [1.8cfg]: https://github.com/rust-lang/cargo/pull/2328
1942 [1.8ci]: https://github.com/rust-lang/cargo/pull/2081
1943 [1.8ck]: https://github.com/rust-lang/cargo/pull/2370
1944 [1.8ct]: https://github.com/rust-lang/cargo/pull/2335
1945 [1.8cu]: https://github.com/rust-lang/rust/pull/31390
1946 [1.8cv]: https://github.com/rust-lang/cargo/issues/2365
1947 [1.8cv]: https://github.com/rust-lang/rust/pull/30998
1948 [1.8h]: https://github.com/rust-lang/rust/pull/31460
1949 [1.8l]: https://github.com/rust-lang/rust/pull/31668
1950 [1.8m]: https://github.com/rust-lang/rust/pull/31020
1951 [1.8mf]: https://github.com/rust-lang/rust/pull/31534
1952 [1.8mp]: https://github.com/rust-lang/rust/pull/30894
1953 [1.8mr]: https://users.rust-lang.org/t/multirust-0-8-with-cross-std-installation/4901
1954 [1.8ms]: https://github.com/rust-lang/rust/pull/30448
1955 [1.8n]: https://github.com/rust-lang/rust/pull/31056
1956 [1.8nx]: https://github.com/rust-lang/rust/pull/30859
1957 [1.8r]: https://github.com/rust-lang/rust/pull/31551
1958 [1.8so]: https://github.com/rust-lang/rust/pull/31333
1959 [1.8st]: https://github.com/rust-lang/rust/pull/29520
1960 [1.8t]: https://github.com/rust-lang/rust/pull/31358
1961 [1.8tn]: https://github.com/rust-lang/rust/pull/30882
1962 [1.8u]: https://github.com/rust-lang/rust/pull/31793
1963 [1.8v]: https://github.com/rust-lang/rust/pull/31757
1964 [1.8w]: https://github.com/rust-lang/rust/pull/31904
1965 [RFC 1361]: https://github.com/rust-lang/rfcs/blob/master/text/1361-cargo-cfg-dependencies.md
1966 [RFC 1415]: https://github.com/rust-lang/rfcs/blob/master/text/1415-trim-std-os.md
1967 [RFC 218]: https://github.com/rust-lang/rfcs/blob/master/text/0218-empty-struct-with-braces.md
1968 [RFC 953]: https://github.com/rust-lang/rfcs/blob/master/text/0953-op-assign.md
1969 [`AddAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.AddAssign.html
1970 [`BitAndAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitAndAssign.html
1971 [`BitOrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitOrAssign.html
1972 [`BitXorAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitXorAssign.html
1973 [`DivAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.DivAssign.html
1974 [`Instant::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.duration_since
1975 [`Instant::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.elapsed
1976 [`Instant::now`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.now
1977 [`MulAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.MulAssign.html
1978 [`Ref::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.Ref.html#method.map
1979 [`RefMut::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.RefMut.html#method.map
1980 [`RemAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.RemAssign.html
1981 [`ShlAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShlAssign.html
1982 [`ShrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShrAssign.html
1983 [`SubAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.SubAssign.html
1984 [`SystemTime::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.duration_since
1985 [`SystemTime::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.elapsed
1986 [`SystemTime::now`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.now
1987 [`SystemTimeError::duration`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html#method.duration
1988 [`SystemTimeError`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html
1989 [`UNIX_EPOCH`]: http://doc.rust-lang.org/nightly/std/time/constant.UNIX_EPOCH.html
1990 [`ptr::drop_in_place`]: http://doc.rust-lang.org/nightly/std/ptr/fn.drop_in_place.html
1991 [`str::EncodeUtf16`]: http://doc.rust-lang.org/nightly/std/str/struct.EncodeUtf16.html
1992 [`str::encode_utf16`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.encode_utf16
1993 [`time::Instant`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html
1994 [`time::SystemTime`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html
1997 Version 1.7.0 (2016-03-03)
1998 ==========================
2005 * [`Path::strip_prefix`][] (renamed from relative_from)
2006 * [`path::StripPrefixError`][] (new error type returned from strip_prefix)
2008 * [`Ipv4Addr::is_loopback`]
2009 * [`Ipv4Addr::is_private`]
2010 * [`Ipv4Addr::is_link_local`]
2011 * [`Ipv4Addr::is_multicast`]
2012 * [`Ipv4Addr::is_broadcast`]
2013 * [`Ipv4Addr::is_documentation`]
2015 * [`Ipv6Addr::is_unspecified`]
2016 * [`Ipv6Addr::is_loopback`]
2017 * [`Ipv6Addr::is_multicast`]
2020 * [`Vec::as_mut_slice`]
2022 * [`String::as_str`]
2023 * [`String::as_mut_str`]
2025 * `<[T]>::`[`clone_from_slice`], which now requires the two slices to
2027 * `<[T]>::`[`sort_by_key`]
2028 * checked, saturated, and overflowing operations
2029 * [`i32::checked_rem`], [`i32::checked_neg`], [`i32::checked_shl`], [`i32::checked_shr`]
2030 * [`i32::saturating_mul`]
2031 * [`i32::overflowing_add`], [`i32::overflowing_sub`], [`i32::overflowing_mul`], [`i32::overflowing_div`]
2032 * [`i32::overflowing_rem`], [`i32::overflowing_neg`], [`i32::overflowing_shl`], [`i32::overflowing_shr`]
2033 * [`u32::checked_rem`], [`u32::checked_neg`], [`u32::checked_shl`], [`u32::checked_shl`]
2034 * [`u32::saturating_mul`]
2035 * [`u32::overflowing_add`], [`u32::overflowing_sub`], [`u32::overflowing_mul`], [`u32::overflowing_div`]
2036 * [`u32::overflowing_rem`], [`u32::overflowing_neg`], [`u32::overflowing_shl`], [`u32::overflowing_shr`]
2037 * and checked, saturated, and overflowing operations for other primitive types
2039 * [`ffi::IntoStringError`]
2040 * [`CString::into_string`]
2041 * [`CString::into_bytes`]
2042 * [`CString::into_bytes_with_nul`]
2043 * `From<CString> for Vec<u8>`
2045 * [`IntoStringError::into_cstring`]
2046 * [`IntoStringError::utf8_error`]
2047 * `Error for IntoStringError`
2049 * [`std::hash::BuildHasher`]
2050 * [`BuildHasher::Hasher`]
2051 * [`BuildHasher::build_hasher`]
2052 * [`std::hash::BuildHasherDefault`]
2053 * [`HashMap::with_hasher`]
2054 * [`HashMap::with_capacity_and_hasher`]
2055 * [`HashSet::with_hasher`]
2056 * [`HashSet::with_capacity_and_hasher`]
2057 * [`std::collections::hash_map::RandomState`]
2058 * [`RandomState::new`]
2059 * [Validating UTF-8 is faster by a factor of between 7 and 14x for
2060 ASCII input][1.7utf8]. This means that creating `String`s and `str`s
2061 from bytes is faster.
2062 * [The performance of `LineWriter` (and thus `io::stdout`) was
2063 improved by using `memchr` to search for newlines][1.7m].
2064 * [`f32::to_degrees` and `f32::to_radians` are stable][1.7f]. The
2065 `f64` variants were stabilized previously.
2066 * [`BTreeMap` was rewritten to use less memory and improve the performance
2067 of insertion and iteration, the latter by as much as 5x][1.7bm].
2068 * [`BTreeSet` and its iterators, `Iter`, `IntoIter`, and `Range` are
2069 covariant over their contained type][1.7bt].
2070 * [`LinkedList` and its iterators, `Iter` and `IntoIter` are covariant
2071 over their contained type][1.7ll].
2072 * [`str::replace` now accepts a `Pattern`][1.7rp], like other string
2074 * [`Any` is implemented for unsized types][1.7a].
2075 * [`Hash` is implemented for `Duration`][1.7h].
2080 * [When running tests with `--test`, rustdoc will pass `--cfg`
2081 arguments to the compiler][1.7dt].
2082 * [The compiler is built with RPATH information by default][1.7rpa].
2083 This means that it will be possible to run `rustc` when installed in
2084 unusual configurations without configuring the dynamic linker search
2086 * [`rustc` passes `--enable-new-dtags` to GNU ld][1.7dta]. This makes
2087 any RPATH entries (emitted with `-C rpath`) *not* take precedence
2088 over `LD_LIBRARY_PATH`.
2093 * [`cargo rustc` accepts a `--profile` flag that runs `rustc` under
2094 any of the compilation profiles, 'dev', 'bench', or 'test'][1.7cp].
2095 * [The `rerun-if-changed` build script directive no longer causes the
2096 build script to incorrectly run twice in certain scenarios][1.7rr].
2101 * Soundness fixes to the interactions between associated types and
2102 lifetimes, specified in [RFC 1214], [now generate errors][1.7sf] for
2103 code that violates the new rules. This is a significant change that
2104 is known to break existing code, so it has emitted warnings for the
2105 new error cases since 1.4 to give crate authors time to adapt. The
2106 details of what is changing are subtle; read the RFC for more.
2107 * [Several bugs in the compiler's visibility calculations were
2108 fixed][1.7v]. Since this was found to break significant amounts of
2109 code, the new errors will be emitted as warnings for several release
2110 cycles, under the `private_in_public` lint.
2111 * Defaulted type parameters were accidentally accepted in positions
2112 that were not intended. In this release, [defaulted type parameters
2113 appearing outside of type definitions will generate a
2114 warning][1.7d], which will become an error in future releases.
2115 * [Parsing "." as a float results in an error instead of 0][1.7p].
2116 That is, `".".parse::<f32>()` returns `Err`, not `Ok(0.0)`.
2117 * [Borrows of closure parameters may not outlive the closure][1.7bc].
2119 [1.7a]: https://github.com/rust-lang/rust/pull/30928
2120 [1.7bc]: https://github.com/rust-lang/rust/pull/30341
2121 [1.7bm]: https://github.com/rust-lang/rust/pull/30426
2122 [1.7bt]: https://github.com/rust-lang/rust/pull/30998
2123 [1.7cp]: https://github.com/rust-lang/cargo/pull/2224
2124 [1.7d]: https://github.com/rust-lang/rust/pull/30724
2125 [1.7dt]: https://github.com/rust-lang/rust/pull/30372
2126 [1.7dta]: https://github.com/rust-lang/rust/pull/30394
2127 [1.7f]: https://github.com/rust-lang/rust/pull/30672
2128 [1.7h]: https://github.com/rust-lang/rust/pull/30818
2129 [1.7ll]: https://github.com/rust-lang/rust/pull/30663
2130 [1.7m]: https://github.com/rust-lang/rust/pull/30381
2131 [1.7p]: https://github.com/rust-lang/rust/pull/30681
2132 [1.7rp]: https://github.com/rust-lang/rust/pull/29498
2133 [1.7rpa]: https://github.com/rust-lang/rust/pull/30353
2134 [1.7rr]: https://github.com/rust-lang/cargo/pull/2279
2135 [1.7sf]: https://github.com/rust-lang/rust/pull/30389
2136 [1.7utf8]: https://github.com/rust-lang/rust/pull/30740
2137 [1.7v]: https://github.com/rust-lang/rust/pull/29973
2138 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
2139 [`BuildHasher::Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
2140 [`BuildHasher::build_hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html#tymethod.build_hasher
2141 [`CString::into_bytes_with_nul`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes_with_nul
2142 [`CString::into_bytes`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes
2143 [`CString::into_string`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_string
2144 [`HashMap::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_capacity_and_hasher
2145 [`HashMap::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_hasher
2146 [`HashSet::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_capacity_and_hasher
2147 [`HashSet::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_hasher
2148 [`IntoStringError::into_cstring`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.into_cstring
2149 [`IntoStringError::utf8_error`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.utf8_error
2150 [`Ipv4Addr::is_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_broadcast
2151 [`Ipv4Addr::is_documentation`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_documentation
2152 [`Ipv4Addr::is_link_local`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_link_local
2153 [`Ipv4Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_loopback
2154 [`Ipv4Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_multicast
2155 [`Ipv4Addr::is_private`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_private
2156 [`Ipv6Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_loopback
2157 [`Ipv6Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_multicast
2158 [`Ipv6Addr::is_unspecified`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_unspecified
2159 [`Path::strip_prefix`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.strip_prefix
2160 [`RandomState::new`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html#method.new
2161 [`String::as_mut_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_mut_str
2162 [`String::as_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_str
2163 [`Vec::as_mut_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_mut_slice
2164 [`Vec::as_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_slice
2165 [`clone_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.clone_from_slice
2166 [`ffi::IntoStringError`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html
2167 [`i32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_neg
2168 [`i32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_rem
2169 [`i32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shl
2170 [`i32::checked_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shr
2171 [`i32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_add
2172 [`i32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_div
2173 [`i32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_mul
2174 [`i32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_neg
2175 [`i32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_rem
2176 [`i32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shl
2177 [`i32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shr
2178 [`i32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_sub
2179 [`i32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.saturating_mul
2180 [`path::StripPrefixError`]: http://doc.rust-lang.org/nightly/std/path/struct.StripPrefixError.html
2181 [`sort_by_key`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.sort_by_key
2182 [`std::collections::hash_map::RandomState`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html
2183 [`std::hash::BuildHasherDefault`]: http://doc.rust-lang.org/nightly/std/hash/struct.BuildHasherDefault.html
2184 [`std::hash::BuildHasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html
2185 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
2186 [`u32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_rem
2187 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
2188 [`u32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_shl
2189 [`u32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_add
2190 [`u32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_div
2191 [`u32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_mul
2192 [`u32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_neg
2193 [`u32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_rem
2194 [`u32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shl
2195 [`u32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shr
2196 [`u32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_sub
2197 [`u32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.saturating_mul
2200 Version 1.6.0 (2016-01-21)
2201 ==========================
2206 * The `#![no_std]` attribute causes a crate to not be linked to the
2207 standard library, but only the [core library][1.6co], as described
2208 in [RFC 1184]. The core library defines common types and traits but
2209 has no platform dependencies whatsoever, and is the basis for Rust
2210 software in environments that cannot support a full port of the
2211 standard library, such as operating systems. Most of the core
2212 library is now stable.
2218 [`Read::read_exact`],
2219 [`ErrorKind::UnexpectedEof`][] (renamed from `UnexpectedEOF`),
2220 [`fs::DirBuilder`], [`fs::DirBuilder::new`],
2221 [`fs::DirBuilder::recursive`], [`fs::DirBuilder::create`],
2222 [`os::unix::fs::DirBuilderExt`],
2223 [`os::unix::fs::DirBuilderExt::mode`], [`vec::Drain`],
2224 [`vec::Vec::drain`], [`string::Drain`], [`string::String::drain`],
2225 [`vec_deque::Drain`], [`vec_deque::VecDeque::drain`],
2226 [`collections::hash_map::Drain`],
2227 [`collections::hash_map::HashMap::drain`],
2228 [`collections::hash_set::Drain`],
2229 [`collections::hash_set::HashSet::drain`],
2230 [`collections::binary_heap::Drain`],
2231 [`collections::binary_heap::BinaryHeap::drain`],
2232 [`Vec::extend_from_slice`][] (renamed from `push_all`),
2233 [`Mutex::get_mut`], [`Mutex::into_inner`], [`RwLock::get_mut`],
2234 [`RwLock::into_inner`],
2235 [`Iterator::min_by_key`][] (renamed from `min_by`),
2236 [`Iterator::max_by_key`][] (renamed from `max_by`).
2237 * The [core library][1.6co] is stable, as are most of its APIs.
2238 * [The `assert_eq!` macro supports arguments that don't implement
2239 `Sized`][1.6ae], such as arrays. In this way it behaves more like
2241 * Several timer functions that take duration in milliseconds [are
2242 deprecated in favor of those that take `Duration`][1.6ms]. These
2243 include `Condvar::wait_timeout_ms`, `thread::sleep_ms`, and
2244 `thread::park_timeout_ms`.
2245 * The algorithm by which `Vec` reserves additional elements was
2246 [tweaked to not allocate excessive space][1.6a] while still growing
2248 * `From` conversions are [implemented from integers to floats][1.6f]
2249 in cases where the conversion is lossless. Thus they are not
2250 implemented for 32-bit ints to `f32`, nor for 64-bit ints to `f32`
2251 or `f64`. They are also not implemented for `isize` and `usize`
2252 because the implementations would be platform-specific. `From` is
2253 also implemented from `f32` to `f64`.
2254 * `From<&Path>` and `From<PathBuf>` are implemented for `Cow<Path>`.
2255 * `From<T>` is implemented for `Box<T>`, `Rc<T>` and `Arc<T>`.
2256 * `IntoIterator` is implemented for `&PathBuf` and `&Path`.
2257 * [`BinaryHeap` was refactored][1.6bh] for modest performance
2259 * Sorting slices that are already sorted [is 50% faster in some
2265 * Cargo will look in `$CARGO_HOME/bin` for subcommands [by default][1.6c].
2266 * Cargo build scripts can specify their dependencies by emitting the
2267 [`rerun-if-changed`][1.6rr] key.
2268 * crates.io will reject publication of crates with dependencies that
2269 have a wildcard version constraint. Crates with wildcard
2270 dependencies were seen to cause a variety of problems, as described
2271 in [RFC 1241]. Since 1.5 publication of such crates has emitted a
2273 * `cargo clean` [accepts a `--release` flag][1.6cc] to clean the
2274 release folder. A variety of artifacts that Cargo failed to clean
2275 are now correctly deleted.
2280 * The `unreachable_code` lint [warns when a function call's argument
2282 * The parser indicates [failures that may be caused by
2283 confusingly-similar Unicode characters][1.6uc]
2284 * Certain macro errors [are reported at definition time][1.6m], not
2290 * The compiler no longer makes use of the [`RUST_PATH`][1.6rp]
2291 environment variable when locating crates. This was a pre-cargo
2292 feature for integrating with the package manager that was
2293 accidentally never removed.
2294 * [A number of bugs were fixed in the privacy checker][1.6p] that
2295 could cause previously-accepted code to break.
2296 * [Modules and unit/tuple structs may not share the same name][1.6ts].
2297 * [Bugs in pattern matching unit structs were fixed][1.6us]. The tuple
2298 struct pattern syntax (`Foo(..)`) can no longer be used to match
2299 unit structs. This is a warning now, but will become an error in
2300 future releases. Patterns that share the same name as a const are
2302 * A bug was fixed that causes [rustc not to apply default type
2303 parameters][1.6xc] when resolving certain method implementations of
2304 traits defined in other crates.
2306 [1.6a]: https://github.com/rust-lang/rust/pull/29454
2307 [1.6ae]: https://github.com/rust-lang/rust/pull/29770
2308 [1.6bh]: https://github.com/rust-lang/rust/pull/29811
2309 [1.6c]: https://github.com/rust-lang/cargo/pull/2192
2310 [1.6cc]: https://github.com/rust-lang/cargo/pull/2131
2311 [1.6co]: http://doc.rust-lang.org/beta/core/index.html
2312 [1.6dv]: https://github.com/rust-lang/rust/pull/30000
2313 [1.6f]: https://github.com/rust-lang/rust/pull/29129
2314 [1.6m]: https://github.com/rust-lang/rust/pull/29828
2315 [1.6ms]: https://github.com/rust-lang/rust/pull/29604
2316 [1.6p]: https://github.com/rust-lang/rust/pull/29726
2317 [1.6rp]: https://github.com/rust-lang/rust/pull/30034
2318 [1.6rr]: https://github.com/rust-lang/cargo/pull/2134
2319 [1.6s]: https://github.com/rust-lang/rust/pull/29675
2320 [1.6ts]: https://github.com/rust-lang/rust/issues/21546
2321 [1.6uc]: https://github.com/rust-lang/rust/pull/29837
2322 [1.6us]: https://github.com/rust-lang/rust/pull/29383
2323 [1.6xc]: https://github.com/rust-lang/rust/issues/30123
2324 [RFC 1184]: https://github.com/rust-lang/rfcs/blob/master/text/1184-stabilize-no_std.md
2325 [RFC 1241]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
2326 [`ErrorKind::UnexpectedEof`]: http://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html#variant.UnexpectedEof
2327 [`Iterator::max_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.max_by_key
2328 [`Iterator::min_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.min_by_key
2329 [`Mutex::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.get_mut
2330 [`Mutex::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.into_inner
2331 [`Read::read_exact`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_exact
2332 [`RwLock::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.get_mut
2333 [`RwLock::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.into_inner
2334 [`Vec::extend_from_slice`]: http://doc.rust-lang.org/nightly/collections/vec/struct.Vec.html#method.extend_from_slice
2335 [`collections::binary_heap::BinaryHeap::drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.BinaryHeap.html#method.drain
2336 [`collections::binary_heap::Drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.Drain.html
2337 [`collections::hash_map::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.Drain.html
2338 [`collections::hash_map::HashMap::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.HashMap.html#method.drain
2339 [`collections::hash_set::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.Drain.html
2340 [`collections::hash_set::HashSet::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.HashSet.html#method.drain
2341 [`fs::DirBuilder::create`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.create
2342 [`fs::DirBuilder::new`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.new
2343 [`fs::DirBuilder::recursive`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.recursive
2344 [`fs::DirBuilder`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html
2345 [`os::unix::fs::DirBuilderExt::mode`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html#tymethod.mode
2346 [`os::unix::fs::DirBuilderExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html
2347 [`string::Drain`]: http://doc.rust-lang.org/nightly/std/string/struct.Drain.html
2348 [`string::String::drain`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.drain
2349 [`vec::Drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Drain.html
2350 [`vec::Vec::drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.drain
2351 [`vec_deque::Drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.Drain.html
2352 [`vec_deque::VecDeque::drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.VecDeque.html#method.drain
2355 Version 1.5.0 (2015-12-10)
2356 ==========================
2358 * ~700 changes, numerous bugfixes
2364 [`BinaryHeap::from`], [`BinaryHeap::into_sorted_vec`],
2365 [`BinaryHeap::into_vec`], [`Condvar::wait_timeout`],
2366 [`FileTypeExt::is_block_device`], [`FileTypeExt::is_char_device`],
2367 [`FileTypeExt::is_fifo`], [`FileTypeExt::is_socket`],
2368 [`FileTypeExt`], [`Formatter::alternate`], [`Formatter::fill`],
2369 [`Formatter::precision`], [`Formatter::sign_aware_zero_pad`],
2370 [`Formatter::sign_minus`], [`Formatter::sign_plus`],
2371 [`Formatter::width`], [`Iterator::cmp`], [`Iterator::eq`],
2372 [`Iterator::ge`], [`Iterator::gt`], [`Iterator::le`],
2373 [`Iterator::lt`], [`Iterator::ne`], [`Iterator::partial_cmp`],
2374 [`Path::canonicalize`], [`Path::exists`], [`Path::is_dir`],
2375 [`Path::is_file`], [`Path::metadata`], [`Path::read_dir`],
2376 [`Path::read_link`], [`Path::symlink_metadata`],
2377 [`Utf8Error::valid_up_to`], [`Vec::resize`],
2378 [`VecDeque::as_mut_slices`], [`VecDeque::as_slices`],
2379 [`VecDeque::insert`], [`VecDeque::shrink_to_fit`],
2380 [`VecDeque::swap_remove_back`], [`VecDeque::swap_remove_front`],
2381 [`slice::split_first_mut`], [`slice::split_first`],
2382 [`slice::split_last_mut`], [`slice::split_last`],
2383 [`char::from_u32_unchecked`], [`fs::canonicalize`],
2384 [`str::MatchIndices`], [`str::RMatchIndices`],
2385 [`str::match_indices`], [`str::rmatch_indices`],
2386 [`str::slice_mut_unchecked`], [`string::ParseError`].
2387 * Rust applications hosted on crates.io can be installed locally to
2388 `~/.cargo/bin` with the [`cargo install`] command. Among other
2389 things this makes it easier to augment Cargo with new subcommands:
2390 when a binary named e.g. `cargo-foo` is found in `$PATH` it can be
2391 invoked as `cargo foo`.
2392 * Crates with wildcard (`*`) dependencies will [emit warnings when
2393 published][1.5w]. In 1.6 it will no longer be possible to publish
2394 crates with wildcard dependencies.
2399 * The rules determining when a particular lifetime must outlive
2400 a particular value (known as '[dropck]') have been [modified
2401 to not rely on parametricity][1.5p].
2402 * [Implementations of `AsRef` and `AsMut` were added to `Box`, `Rc`,
2403 and `Arc`][1.5a]. Because these smart pointer types implement
2404 `Deref`, this causes breakage in cases where the interior type
2405 contains methods of the same name.
2406 * [Correct a bug in Rc/Arc][1.5c] that caused [dropck] to be unaware
2407 that they could drop their content. Soundness fix.
2408 * All method invocations are [properly checked][1.5wf1] for
2409 [well-formedness][1.5wf2]. Soundness fix.
2410 * Traits whose supertraits contain `Self` are [not object
2411 safe][1.5o]. Soundness fix.
2412 * Target specifications support a [`no_default_libraries`][1.5nd]
2413 setting that controls whether `-nodefaultlibs` is passed to the
2414 linker, and in turn the `is_like_windows` setting no longer affects
2415 the `-nodefaultlibs` flag.
2416 * `#[derive(Show)]`, long-deprecated, [has been removed][1.5ds].
2417 * The `#[inline]` and `#[repr]` attributes [can only appear
2418 in valid locations][1.5at].
2419 * Native libraries linked from the local crate are [passed to
2420 the linker before native libraries from upstream crates][1.5nl].
2421 * Two rarely-used attributes, `#[no_debug]` and
2422 `#[omit_gdb_pretty_printer_section]` [are feature gated][1.5fg].
2423 * Negation of unsigned integers, which has been a warning for
2424 several releases, [is now behind a feature gate and will
2425 generate errors][1.5nu].
2426 * The parser accidentally accepted visibility modifiers on
2427 enum variants, a bug [which has been fixed][1.5ev].
2428 * [A bug was fixed that allowed `use` statements to import unstable
2434 * When evaluating expressions at compile-time that are not
2435 compile-time constants (const-evaluating expressions in non-const
2436 contexts), incorrect code such as overlong bitshifts and arithmetic
2437 overflow will [generate a warning instead of an error][1.5ce],
2438 delaying the error until runtime. This will allow the
2439 const-evaluator to be expanded in the future backwards-compatibly.
2440 * The `improper_ctypes` lint [no longer warns about using `isize` and
2441 `usize` in FFI][1.5ict].
2446 * `Arc<T>` and `Rc<T>` are [covariant with respect to `T` instead of
2448 * `Default` is [implemented for mutable slices][1.5d].
2449 * `FromStr` is [implemented for `SockAddrV4` and `SockAddrV6`][1.5s].
2450 * There are now `From` conversions [between floating point
2451 types][1.5f] where the conversions are lossless.
2452 * Thera are now `From` conversions [between integer types][1.5i] where
2453 the conversions are lossless.
2454 * [`fs::Metadata` implements `Clone`][1.5fs].
2455 * The `parse` method [accepts a leading "+" when parsing
2457 * [`AsMut` is implemented for `Vec`][1.5am].
2458 * The `clone_from` implementations for `String` and `BinaryHeap` [have
2459 been optimized][1.5cf] and no longer rely on the default impl.
2460 * The `extern "Rust"`, `extern "C"`, `unsafe extern "Rust"` and
2461 `unsafe extern "C"` function types now [implement `Clone`,
2462 `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and
2463 `fmt::Debug` for up to 12 arguments][1.5fp].
2464 * [Dropping `Vec`s is much faster in unoptimized builds when the
2465 element types don't implement `Drop`][1.5dv].
2466 * A bug that caused in incorrect behavior when [combining `VecDeque`
2467 with zero-sized types][1.5vdz] was resolved.
2468 * [`PartialOrd` for slices is faster][1.5po].
2473 * [Crate metadata size was reduced by 20%][1.5md].
2474 * [Improvements to code generation reduced the size of libcore by 3.3
2475 MB and rustc's memory usage by 18MB][1.5m].
2476 * [Improvements to deref translation increased performance in
2477 unoptimized builds][1.5dr].
2478 * Various errors in trait resolution [are deduplicated to only be
2479 reported once][1.5te].
2480 * Rust has preliminary [support for rumprun kernels][1.5rr].
2481 * Rust has preliminary [support for NetBSD on amd64][1.5na].
2483 [1.5use]: https://github.com/rust-lang/rust/pull/28364
2484 [1.5po]: https://github.com/rust-lang/rust/pull/28436
2485 [1.5ev]: https://github.com/rust-lang/rust/pull/28442
2486 [1.5nu]: https://github.com/rust-lang/rust/pull/28468
2487 [1.5dr]: https://github.com/rust-lang/rust/pull/28491
2488 [1.5vdz]: https://github.com/rust-lang/rust/pull/28494
2489 [1.5md]: https://github.com/rust-lang/rust/pull/28521
2490 [1.5fg]: https://github.com/rust-lang/rust/pull/28522
2491 [1.5dv]: https://github.com/rust-lang/rust/pull/28531
2492 [1.5na]: https://github.com/rust-lang/rust/pull/28543
2493 [1.5fp]: https://github.com/rust-lang/rust/pull/28560
2494 [1.5rr]: https://github.com/rust-lang/rust/pull/28593
2495 [1.5cf]: https://github.com/rust-lang/rust/pull/28602
2496 [1.5nl]: https://github.com/rust-lang/rust/pull/28605
2497 [1.5te]: https://github.com/rust-lang/rust/pull/28645
2498 [1.5at]: https://github.com/rust-lang/rust/pull/28650
2499 [1.5am]: https://github.com/rust-lang/rust/pull/28663
2500 [1.5m]: https://github.com/rust-lang/rust/pull/28778
2501 [1.5ict]: https://github.com/rust-lang/rust/pull/28779
2502 [1.5a]: https://github.com/rust-lang/rust/pull/28811
2503 [1.5pi]: https://github.com/rust-lang/rust/pull/28826
2504 [1.5ce]: https://github.com/rust-lang/rfcs/blob/master/text/1229-compile-time-asserts.md
2505 [1.5p]: https://github.com/rust-lang/rfcs/blob/master/text/1238-nonparametric-dropck.md
2506 [1.5i]: https://github.com/rust-lang/rust/pull/28921
2507 [1.5fs]: https://github.com/rust-lang/rust/pull/29021
2508 [1.5f]: https://github.com/rust-lang/rust/pull/29129
2509 [1.5ds]: https://github.com/rust-lang/rust/pull/29148
2510 [1.5s]: https://github.com/rust-lang/rust/pull/29190
2511 [1.5d]: https://github.com/rust-lang/rust/pull/29245
2512 [1.5o]: https://github.com/rust-lang/rust/pull/29259
2513 [1.5nd]: https://github.com/rust-lang/rust/pull/28578
2514 [1.5wf2]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
2515 [1.5wf1]: https://github.com/rust-lang/rust/pull/28669
2516 [dropck]: https://doc.rust-lang.org/nightly/nomicon/dropck.html
2517 [1.5c]: https://github.com/rust-lang/rust/pull/29110
2518 [1.5w]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
2519 [`cargo install`]: https://github.com/rust-lang/rfcs/blob/master/text/1200-cargo-install.md
2520 [`BinaryHeap::from`]: http://doc.rust-lang.org/nightly/std/convert/trait.From.html#method.from
2521 [`BinaryHeap::into_sorted_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_sorted_vec
2522 [`BinaryHeap::into_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_vec
2523 [`Condvar::wait_timeout`]: http://doc.rust-lang.org/nightly/std/sync/struct.Condvar.html#method.wait_timeout
2524 [`FileTypeExt::is_block_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_block_device
2525 [`FileTypeExt::is_char_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_char_device
2526 [`FileTypeExt::is_fifo`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_fifo
2527 [`FileTypeExt::is_socket`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_socket
2528 [`FileTypeExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html
2529 [`Formatter::alternate`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.alternate
2530 [`Formatter::fill`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.fill
2531 [`Formatter::precision`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.precision
2532 [`Formatter::sign_aware_zero_pad`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_aware_zero_pad
2533 [`Formatter::sign_minus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_minus
2534 [`Formatter::sign_plus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_plus
2535 [`Formatter::width`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.width
2536 [`Iterator::cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.cmp
2537 [`Iterator::eq`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.eq
2538 [`Iterator::ge`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ge
2539 [`Iterator::gt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.gt
2540 [`Iterator::le`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.le
2541 [`Iterator::lt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.lt
2542 [`Iterator::ne`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ne
2543 [`Iterator::partial_cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.partial_cmp
2544 [`Path::canonicalize`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.canonicalize
2545 [`Path::exists`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.exists
2546 [`Path::is_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_dir
2547 [`Path::is_file`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_file
2548 [`Path::metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.metadata
2549 [`Path::read_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_dir
2550 [`Path::read_link`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_link
2551 [`Path::symlink_metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.symlink_metadata
2552 [`Utf8Error::valid_up_to`]: http://doc.rust-lang.org/nightly/core/str/struct.Utf8Error.html#method.valid_up_to
2553 [`Vec::resize`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.resize
2554 [`VecDeque::as_mut_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_mut_slices
2555 [`VecDeque::as_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_slices
2556 [`VecDeque::insert`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.insert
2557 [`VecDeque::shrink_to_fit`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.shrink_to_fit
2558 [`VecDeque::swap_remove_back`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_back
2559 [`VecDeque::swap_remove_front`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_front
2560 [`slice::split_first_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first_mut
2561 [`slice::split_first`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first
2562 [`slice::split_last_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last_mut
2563 [`slice::split_last`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last
2564 [`char::from_u32_unchecked`]: http://doc.rust-lang.org/nightly/std/char/fn.from_u32_unchecked.html
2565 [`fs::canonicalize`]: http://doc.rust-lang.org/nightly/std/fs/fn.canonicalize.html
2566 [`str::MatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.MatchIndices.html
2567 [`str::RMatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.RMatchIndices.html
2568 [`str::match_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.match_indices
2569 [`str::rmatch_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatch_indices
2570 [`str::slice_mut_unchecked`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.slice_mut_unchecked
2571 [`string::ParseError`]: http://doc.rust-lang.org/nightly/std/string/enum.ParseError.html
2573 Version 1.4.0 (2015-10-29)
2574 ==========================
2576 * ~1200 changes, numerous bugfixes
2581 * Windows builds targeting the 64-bit MSVC ABI and linker (instead of
2582 GNU) are now supported and recommended for use.
2587 * [Several changes have been made to fix type soundness and improve
2588 the behavior of associated types][sound]. See [RFC 1214]. Although
2589 we have mostly introduced these changes as warnings this release, to
2590 become errors next release, there are still some scenarios that will
2591 see immediate breakage.
2592 * [The `str::lines` and `BufRead::lines` iterators treat `\r\n` as
2593 line breaks in addition to `\n`][crlf].
2594 * [Loans of `'static` lifetime extend to the end of a function][stat].
2595 * [`str::parse` no longer introduces avoidable rounding error when
2596 parsing floating point numbers. Together with earlier changes to
2597 float formatting/output, "round trips" like f.to_string().parse()
2598 now preserve the value of f exactly. Additionally, leading plus
2599 signs are now accepted][fp3].
2605 * `use` statements that import multiple items [can now rename
2606 them][i], as in `use foo::{bar as kitten, baz as puppy}`.
2607 * [Binops work correctly on fat pointers][binfat].
2608 * `pub extern crate`, which does not behave as expected, [issues a
2609 warning][pec] until a better solution is found.
2614 * [Many APIs were stabilized][stab]: `<Box<str>>::into_string`,
2615 [`Arc::downgrade`], [`Arc::get_mut`], [`Arc::make_mut`],
2616 [`Arc::try_unwrap`], [`Box::from_raw`], [`Box::into_raw`], [`CStr::to_str`],
2617 [`CStr::to_string_lossy`], [`CString::from_raw`], [`CString::into_raw`],
2618 [`IntoRawFd::into_raw_fd`], [`IntoRawFd`],
2619 `IntoRawHandle::into_raw_handle`, `IntoRawHandle`,
2620 `IntoRawSocket::into_raw_socket`, `IntoRawSocket`, [`Rc::downgrade`],
2621 [`Rc::get_mut`], [`Rc::make_mut`], [`Rc::try_unwrap`], [`Result::expect`],
2622 [`String::into_boxed_str`], [`TcpStream::read_timeout`],
2623 [`TcpStream::set_read_timeout`], [`TcpStream::set_write_timeout`],
2624 [`TcpStream::write_timeout`], [`UdpSocket::read_timeout`],
2625 [`UdpSocket::set_read_timeout`], [`UdpSocket::set_write_timeout`],
2626 [`UdpSocket::write_timeout`], `Vec::append`, `Vec::split_off`,
2627 [`VecDeque::append`], [`VecDeque::retain`], [`VecDeque::split_off`],
2628 [`rc::Weak::upgrade`], [`rc::Weak`], [`slice::Iter::as_slice`],
2629 [`slice::IterMut::into_slice`], [`str::CharIndices::as_str`],
2630 [`str::Chars::as_str`], [`str::split_at_mut`], [`str::split_at`],
2631 [`sync::Weak::upgrade`], [`sync::Weak`], [`thread::park_timeout`],
2633 * [Some APIs were deprecated][dep]: `BTreeMap::with_b`,
2634 `BTreeSet::with_b`, `Option::as_mut_slice`, `Option::as_slice`,
2635 `Result::as_mut_slice`, `Result::as_slice`, `f32::from_str_radix`,
2636 `f64::from_str_radix`.
2637 * [Reverse-searching strings is faster with the 'two-way'
2639 * [`std::io::copy` allows `?Sized` arguments][cc].
2640 * The `Windows`, `Chunks`, and `ChunksMut` iterators over slices all
2641 [override `count`, `nth` and `last` with an O(1)
2642 implementation][it].
2643 * [`Default` is implemented for arrays up to `[T; 32]`][d].
2644 * [`IntoRawFd` has been added to the Unix-specific prelude,
2645 `IntoRawSocket` and `IntoRawHandle` to the Windows-specific
2647 * [`Extend<String>` and `FromIterator<String` are both implemented for
2649 * [`IntoIterator` is implemented for references to `Option` and
2651 * [`HashMap` and `HashSet` implement `Extend<&T>` where `T:
2652 Copy`][ext] as part of [RFC 839]. This will cause type inferance
2653 breakage in rare situations.
2654 * [`BinaryHeap` implements `Debug`][bh2].
2655 * [`Borrow` and `BorrowMut` are implemented for fixed-size
2657 * [`extern fn`s with the "Rust" and "C" ABIs implement common
2658 traits including `Eq`, `Ord`, `Debug`, `Hash`][fp].
2659 * [String comparison is faster][faststr].
2660 * `&mut T` where `T: std::fmt::Write` [also implements
2661 `std::fmt::Write`][mutw].
2662 * [A stable regression in `VecDeque::push_back` and other
2663 capicity-altering methods that caused panics for zero-sized types
2665 * [Function pointers implement traits for up to 12 parameters][fp2].
2670 * The compiler [no longer uses the 'morestack' feature to prevent
2671 stack overflow][mm]. Instead it uses guard pages and stack
2672 probes (though stack probes are not yet implemented on any platform
2674 * [The compiler matches traits faster when projections are involved][p].
2675 * The 'improper_ctypes' lint [no longer warns about use of `isize` and
2677 * [Cargo now displays useful information about what its doing during
2678 `cargo update`][cu].
2680 [`Arc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.downgrade
2681 [`Arc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.make_mut
2682 [`Arc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.get_mut
2683 [`Arc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.try_unwrap
2684 [`Box::from_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.from_raw
2685 [`Box::into_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.into_raw
2686 [`CStr::to_str`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_str
2687 [`CStr::to_string_lossy`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_string_lossy
2688 [`CString::from_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.from_raw
2689 [`CString::into_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_raw
2690 [`IntoRawFd::into_raw_fd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html#tymethod.into_raw_fd
2691 [`IntoRawFd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html
2692 [`Rc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.downgrade
2693 [`Rc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.get_mut
2694 [`Rc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.make_mut
2695 [`Rc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.try_unwrap
2696 [`Result::expect`]: http://doc.rust-lang.org/nightly/core/result/enum.Result.html#method.expect
2697 [`String::into_boxed_str`]: http://doc.rust-lang.org/nightly/collections/string/struct.String.html#method.into_boxed_str
2698 [`TcpStream::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
2699 [`TcpStream::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
2700 [`TcpStream::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
2701 [`TcpStream::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
2702 [`UdpSocket::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
2703 [`UdpSocket::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
2704 [`UdpSocket::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
2705 [`UdpSocket::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
2706 [`VecDeque::append`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.append
2707 [`VecDeque::retain`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.retain
2708 [`VecDeque::split_off`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.split_off
2709 [`rc::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html#method.upgrade
2710 [`rc::Weak`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html
2711 [`slice::Iter::as_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.Iter.html#method.as_slice
2712 [`slice::IterMut::into_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.IterMut.html#method.into_slice
2713 [`str::CharIndices::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.CharIndices.html#method.as_str
2714 [`str::Chars::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.Chars.html#method.as_str
2715 [`str::split_at_mut`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at_mut
2716 [`str::split_at`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at
2717 [`sync::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html#method.upgrade
2718 [`sync::Weak`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html
2719 [`thread::park_timeout`]: http://doc.rust-lang.org/nightly/std/thread/fn.park_timeout.html
2720 [`thread::sleep`]: http://doc.rust-lang.org/nightly/std/thread/fn.sleep.html
2721 [bh2]: https://github.com/rust-lang/rust/pull/28156
2722 [binfat]: https://github.com/rust-lang/rust/pull/28270
2723 [bm]: https://github.com/rust-lang/rust/pull/28197
2724 [cc]: https://github.com/rust-lang/rust/pull/27531
2725 [crlf]: https://github.com/rust-lang/rust/pull/28034
2726 [cu]: https://github.com/rust-lang/cargo/pull/1931
2727 [d]: https://github.com/rust-lang/rust/pull/27825
2728 [dep]: https://github.com/rust-lang/rust/pull/28339
2729 [es]: https://github.com/rust-lang/rust/pull/27956
2730 [ext]: https://github.com/rust-lang/rust/pull/28094
2731 [faststr]: https://github.com/rust-lang/rust/pull/28338
2732 [ffi]: https://github.com/rust-lang/rust/pull/28779
2733 [fp]: https://github.com/rust-lang/rust/pull/28268
2734 [fp2]: https://github.com/rust-lang/rust/pull/28560
2735 [fp3]: https://github.com/rust-lang/rust/pull/27307
2736 [i]: https://github.com/rust-lang/rust/pull/27451
2737 [into2]: https://github.com/rust-lang/rust/pull/28039
2738 [it]: https://github.com/rust-lang/rust/pull/27652
2739 [mm]: https://github.com/rust-lang/rust/pull/27338
2740 [mutw]: https://github.com/rust-lang/rust/pull/28368
2741 [sound]: https://github.com/rust-lang/rust/pull/27641
2742 [p]: https://github.com/rust-lang/rust/pull/27866
2743 [pec]: https://github.com/rust-lang/rust/pull/28486
2744 [pr]: https://github.com/rust-lang/rust/pull/27896
2745 [RFC 839]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
2746 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
2747 [s]: https://github.com/rust-lang/rust/pull/27474
2748 [stab]: https://github.com/rust-lang/rust/pull/28339
2749 [stat]: https://github.com/rust-lang/rust/pull/28321
2750 [vd]: https://github.com/rust-lang/rust/pull/28494
2752 Version 1.3.0 (2015-09-17)
2753 ==============================
2755 * ~900 changes, numerous bugfixes
2760 * The [new object lifetime defaults][nold] have been [turned
2761 on][nold2] after a cycle of warnings about the change. Now types
2762 like `&'a Box<Trait>` (or `&'a Rc<Trait>`, etc) will change from
2763 being interpreted as `&'a Box<Trait+'a>` to `&'a
2764 Box<Trait+'static>`.
2765 * [The Rustonomicon][nom] is a new book in the official documentation
2766 that dives into writing unsafe Rust.
2767 * The [`Duration`] API, [has been stabilized][ds]. This basic unit of
2768 timekeeping is employed by other std APIs, as well as out-of-tree
2774 * The [new object lifetime defaults][nold] have been [turned
2775 on][nold2] after a cycle of warnings about the change.
2776 * There is a known [regression][lr] in how object lifetime elision is
2777 interpreted, the proper solution for which is undetermined.
2778 * The `#[prelude_import]` attribute, an internal implementation
2779 detail, was accidentally stabilized previously. [It has been put
2780 behind the `prelude_import` feature gate][pi]. This change is
2781 believed to break no existing code.
2782 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
2783 [more sane for dynamically sized types][dst3]. Code that relied on
2784 the previous behavior is thought to be broken.
2785 * The `dropck` rules, which checks that destructors can't access
2786 destroyed values, [have been updated][dropck] to match the
2787 [RFC][dropckrfc]. This fixes some soundness holes, and as such will
2788 cause some previously-compiling code to no longer build.
2793 * The [new object lifetime defaults][nold] have been [turned
2794 on][nold2] after a cycle of warnings about the change.
2795 * Semicolons may [now follow types and paths in
2796 macros](https://github.com/rust-lang/rust/pull/27000).
2797 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
2798 [more sane for dynamically sized types][dst3]. Code that relied on
2799 the previous behavior is not known to exist, and suspected to be
2801 * `'static` variables [may now be recursive][st].
2802 * `ref` bindings choose between [`Deref`] and [`DerefMut`]
2803 implementations correctly.
2804 * The `dropck` rules, which checks that destructors can't access
2805 destroyed values, [have been updated][dropck] to match the
2811 * The [`Duration`] API, [has been stabilized][ds], as well as the
2812 `std::time` module, which presently contains only `Duration`.
2813 * `Box<str>` and `Box<[T]>` both implement `Clone`.
2814 * The owned C string, [`CString`], implements [`Borrow`] and the
2815 borrowed C string, [`CStr`], implements [`ToOwned`]. The two of
2816 these allow C strings to be borrowed and cloned in generic code.
2817 * [`CStr`] implements [`Debug`].
2818 * [`AtomicPtr`] implements [`Debug`].
2819 * [`Error`] trait objects [can be downcast to their concrete types][e]
2820 in many common configurations, using the [`is`], [`downcast`],
2821 [`downcast_ref`] and [`downcast_mut`] methods, similarly to the
2823 * Searching for substrings now [employs the two-way algorithm][search]
2824 instead of doing a naive search. This gives major speedups to a
2825 number of methods, including [`contains`][sc], [`find`][sf],
2826 [`rfind`][srf], [`split`][ss]. [`starts_with`][ssw] and
2827 [`ends_with`][sew] are also faster.
2828 * The performance of `PartialEq` for slices is [much faster][ps].
2829 * The [`Hash`] trait offers the default method, [`hash_slice`], which
2830 is overridden and optimized by the implementations for scalars.
2831 * The [`Hasher`] trait now has a number of specialized `write_*`
2832 methods for primitive types, for efficiency.
2833 * The I/O-specific error type, [`std::io::Error`][ie], gained a set of
2834 methods for accessing the 'inner error', if any: [`get_ref`][iegr],
2835 [`get_mut`][iegm], [`into_inner`][ieii]. As well, the implementation
2836 of [`std::error::Error::cause`][iec] also delegates to the inner
2838 * [`process::Child`][pc] gained the [`id`] method, which returns a
2839 `u32` representing the platform-specific process identifier.
2840 * The [`connect`] method on slices is deprecated, replaced by the new
2841 [`join`] method (note that both of these are on the *unstable*
2842 [`SliceConcatExt`] trait, but through the magic of the prelude are
2843 available to stable code anyway).
2844 * The [`Div`] operator is implemented for [`Wrapping`] types.
2845 * [`DerefMut` is implemented for `String`][dms].
2846 * Performance of SipHash (the default hasher for `HashMap`) is
2847 [better for long data][sh].
2848 * [`AtomicPtr`] implements [`Send`].
2849 * The [`read_to_end`] implementations for [`Stdin`] and [`File`]
2850 are now [specialized to use uninitalized buffers for increased
2852 * Lifetime parameters of foreign functions [are now resolved
2858 * Rust can now, with some coercion, [produce programs that run on
2859 Windows XP][xp], though XP is not considered a supported platform.
2860 * Porting Rust on Windows from the GNU toolchain to MSVC continues
2861 ([1][win1], [2][win2], [3][win3], [4][win4]). It is still not
2862 recommended for use in 1.3, though should be fully-functional
2863 in the [64-bit 1.4 beta][b14].
2864 * On Fedora-based systems installation will [properly configure the
2865 dynamic linker][fl].
2866 * The compiler gained many new extended error descriptions, which can
2867 be accessed with the `--explain` flag.
2868 * The `dropck` pass, which checks that destructors can't access
2869 destroyed values, [has been rewritten][dropck]. This fixes some
2870 soundness holes, and as such will cause some previously-compiling
2871 code to no longer build.
2872 * `rustc` now uses [LLVM to write archive files where possible][ar].
2873 Eventually this will eliminate the compiler's dependency on the ar
2875 * Rust has [preliminary support for i686 FreeBSD][fb] (it has long
2876 supported FreeBSD on x86_64).
2877 * The [`unused_mut`][lum], [`unconditional_recursion`][lur],
2878 [`improper_ctypes`][lic], and [`negate_unsigned`][lnu] lints are
2880 * If landing pads are disabled (with `-Z no-landing-pads`), [`panic!`
2881 will kill the process instead of leaking][nlp].
2883 [`Any`]: http://doc.rust-lang.org/nightly/std/any/trait.Any.html
2884 [`AtomicPtr`]: http://doc.rust-lang.org/nightly/std/sync/atomic/struct.AtomicPtr.html
2885 [`Borrow`]: http://doc.rust-lang.org/nightly/std/borrow/trait.Borrow.html
2886 [`CStr`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html
2887 [`CString`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html
2888 [`Debug`]: http://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
2889 [`DerefMut`]: http://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
2890 [`Deref`]: http://doc.rust-lang.org/nightly/std/ops/trait.Deref.html
2891 [`Div`]: http://doc.rust-lang.org/nightly/std/ops/trait.Div.html
2892 [`Duration`]: http://doc.rust-lang.org/nightly/std/time/struct.Duration.html
2893 [`Error`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html
2894 [`File`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html
2895 [`Hash`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html
2896 [`Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
2897 [`Send`]: http://doc.rust-lang.org/nightly/std/marker/trait.Send.html
2898 [`SliceConcatExt`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html
2899 [`Stdin`]: http://doc.rust-lang.org/nightly/std/io/struct.Stdin.html
2900 [`ToOwned`]: http://doc.rust-lang.org/nightly/std/borrow/trait.ToOwned.html
2901 [`Wrapping`]: http://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
2902 [`connect`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.connect
2903 [`downcast_mut`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_mut
2904 [`downcast_ref`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_ref
2905 [`downcast`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast
2906 [`hash_slice`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
2907 [`id`]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html#method.id
2908 [`is`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.is
2909 [`join`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.join
2910 [`read_to_end`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_to_end
2911 [ar]: https://github.com/rust-lang/rust/pull/26926
2912 [b14]: https://static.rust-lang.org/dist/rust-beta-x86_64-pc-windows-msvc.msi
2913 [dms]: https://github.com/rust-lang/rust/pull/26241
2914 [dropck]: https://github.com/rust-lang/rust/pull/27261
2915 [dropckrfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
2916 [ds]: https://github.com/rust-lang/rust/pull/26818
2917 [dst1]: http://doc.rust-lang.org/nightly/std/mem/fn.size_of_val.html
2918 [dst2]: http://doc.rust-lang.org/nightly/std/mem/fn.align_of_val.html
2919 [dst3]: https://github.com/rust-lang/rust/pull/27351
2920 [e]: https://github.com/rust-lang/rust/pull/24793
2921 [f]: https://github.com/rust-lang/rust/pull/26588
2922 [fb]: https://github.com/rust-lang/rust/pull/26959
2923 [fl]: https://github.com/rust-lang/rust-installer/pull/41
2924 [hs]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
2925 [ie]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html
2926 [iec]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.cause
2927 [iegm]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_mut
2928 [iegr]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_ref
2929 [ieii]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.into_inner
2930 [lic]: https://github.com/rust-lang/rust/pull/26583
2931 [lnu]: https://github.com/rust-lang/rust/pull/27026
2932 [lr]: https://github.com/rust-lang/rust/issues/27248
2933 [lum]: https://github.com/rust-lang/rust/pull/26378
2934 [lur]: https://github.com/rust-lang/rust/pull/26783
2935 [nlp]: https://github.com/rust-lang/rust/pull/27176
2936 [nold2]: https://github.com/rust-lang/rust/pull/27045
2937 [nold]: https://github.com/rust-lang/rfcs/blob/master/text/1156-adjust-default-object-bounds.md
2938 [nom]: http://doc.rust-lang.org/nightly/nomicon/
2939 [pc]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html
2940 [pi]: https://github.com/rust-lang/rust/pull/26699
2941 [ps]: https://github.com/rust-lang/rust/pull/26884
2942 [rte]: https://github.com/rust-lang/rust/pull/26950
2943 [sc]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.contains
2944 [search]: https://github.com/rust-lang/rust/pull/26327
2945 [sew]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.ends_with
2946 [sf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.find
2947 [sh]: https://github.com/rust-lang/rust/pull/27280
2948 [srf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rfind
2949 [ss]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split
2950 [ssw]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.starts_with
2951 [st]: https://github.com/rust-lang/rust/pull/26630
2952 [win1]: https://github.com/rust-lang/rust/pull/26569
2953 [win2]: https://github.com/rust-lang/rust/pull/26741
2954 [win3]: https://github.com/rust-lang/rust/pull/26741
2955 [win4]: https://github.com/rust-lang/rust/pull/27210
2956 [xp]: https://github.com/rust-lang/rust/pull/26569
2958 Version 1.2.0 (2015-08-07)
2959 ==========================
2961 * ~1200 changes, numerous bugfixes
2966 * [Dynamically-sized-type coercions][dst] allow smart pointer types
2967 like `Rc` to contain types without a fixed size, arrays and trait
2968 objects, finally enabling use of `Rc<[T]>` and completing the
2969 implementation of DST.
2970 * [Parallel codegen][parcodegen] is now working again, which can
2971 substantially speed up large builds in debug mode; It also gets
2972 another ~33% speedup when bootstrapping on a 4 core machine (using 8
2973 jobs). It's not enabled by default, but will be "in the near
2974 future". It can be activated with the `-C codegen-units=N` flag to
2976 * This is the first release with [experimental support for linking
2977 with the MSVC linker and lib C on Windows (instead of using the GNU
2978 variants via MinGW)][win]. It is yet recommended only for the most
2979 intrepid Rusticians.
2980 * Benchmark compilations are showing a 30% improvement in
2981 bootstrapping over 1.1.
2986 * The [`to_uppercase`] and [`to_lowercase`] methods on `char` now do
2987 unicode case mapping, which is a previously-planned change in
2988 behavior and considered a bugfix.
2989 * [`mem::align_of`] now specifies [the *minimum alignment* for
2990 T][align], which is usually the alignment programs are interested
2991 in, and the same value reported by clang's
2992 `alignof`. [`mem::min_align_of`] is deprecated. This is not known to
2994 * [The `#[packed]` attribute is no longer silently accepted by the
2995 compiler][packed]. This attribute did nothing and code that
2996 mentioned it likely did not work as intended.
2997 * Associated type defaults are [now behind the
2998 `associated_type_defaults` feature gate][ad]. In 1.1 associated type
2999 defaults *did not work*, but could be mentioned syntactically. As
3000 such this breakage has minimal impact.
3005 * Patterns with `ref mut` now correctly invoke [`DerefMut`] when
3006 matching against dereferencable values.
3011 * The [`Extend`] trait, which grows a collection from an iterator, is
3012 implemented over iterators of references, for `String`, `Vec`,
3013 `LinkedList`, `VecDeque`, `EnumSet`, `BinaryHeap`, `VecMap`,
3014 `BTreeSet` and `BTreeMap`. [RFC][extend-rfc].
3015 * The [`iter::once`] function returns an iterator that yields a single
3016 element, and [`iter::empty`] returns an iterator that yields no
3018 * The [`matches`] and [`rmatches`] methods on `str` return iterators
3019 over substring matches.
3020 * [`Cell`] and [`RefCell`] both implement `Eq`.
3021 * A number of methods for wrapping arithmetic are added to the
3022 integral types, [`wrapping_div`], [`wrapping_rem`],
3023 [`wrapping_neg`], [`wrapping_shl`], [`wrapping_shr`]. These are in
3024 addition to the existing [`wrapping_add`], [`wrapping_sub`], and
3025 [`wrapping_mul`] methods, and alternatives to the [`Wrapping`]
3026 type.. It is illegal for the default arithmetic operations in Rust
3027 to overflow; the desire to wrap must be explicit.
3028 * The `{:#?}` formatting specifier [displays the alternate,
3029 pretty-printed][debugfmt] form of the `Debug` formatter. This
3030 feature was actually introduced prior to 1.0 with little
3032 * [`fmt::Formatter`] implements [`fmt::Write`], a `fmt`-specific trait
3033 for writing data to formatted strings, similar to [`io::Write`].
3034 * [`fmt::Formatter`] adds 'debug builder' methods, [`debug_struct`],
3035 [`debug_tuple`], [`debug_list`], [`debug_set`], [`debug_map`]. These
3036 are used by code generators to emit implementations of [`Debug`].
3037 * `str` has new [`to_uppercase`][strup] and [`to_lowercase`][strlow]
3038 methods that convert case, following Unicode case mapping.
3039 * It is now easier to handle poisoned locks. The [`PoisonError`]
3040 type, returned by failing lock operations, exposes `into_inner`,
3041 `get_ref`, and `get_mut`, which all give access to the inner lock
3042 guard, and allow the poisoned lock to continue to operate. The
3043 `is_poisoned` method of [`RwLock`] and [`Mutex`] can poll for a
3044 poisoned lock without attempting to take the lock.
3045 * On Unix the [`FromRawFd`] trait is implemented for [`Stdio`], and
3046 [`AsRawFd`] for [`ChildStdin`], [`ChildStdout`], [`ChildStderr`].
3047 On Windows the `FromRawHandle` trait is implemented for `Stdio`,
3048 and `AsRawHandle` for `ChildStdin`, `ChildStdout`,
3050 * [`io::ErrorKind`] has a new variant, `InvalidData`, which indicates
3056 * `rustc` employs smarter heuristics for guessing at [typos].
3057 * `rustc` emits more efficient code for [no-op conversions between
3058 unsafe pointers][nop].
3059 * Fat pointers are now [passed in pairs of immediate arguments][fat],
3060 resulting in faster compile times and smaller code.
3062 [`Extend`]: https://doc.rust-lang.org/nightly/std/iter/trait.Extend.html
3063 [extend-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
3064 [`iter::once`]: https://doc.rust-lang.org/nightly/std/iter/fn.once.html
3065 [`iter::empty`]: https://doc.rust-lang.org/nightly/std/iter/fn.empty.html
3066 [`matches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.matches
3067 [`rmatches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatches
3068 [`Cell`]: https://doc.rust-lang.org/nightly/std/cell/struct.Cell.html
3069 [`RefCell`]: https://doc.rust-lang.org/nightly/std/cell/struct.RefCell.html
3070 [`wrapping_add`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_add
3071 [`wrapping_sub`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_sub
3072 [`wrapping_mul`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_mul
3073 [`wrapping_div`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_div
3074 [`wrapping_rem`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_rem
3075 [`wrapping_neg`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_neg
3076 [`wrapping_shl`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shl
3077 [`wrapping_shr`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shr
3078 [`Wrapping`]: https://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
3079 [`fmt::Formatter`]: https://doc.rust-lang.org/nightly/std/fmt/struct.Formatter.html
3080 [`fmt::Write`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Write.html
3081 [`io::Write`]: https://doc.rust-lang.org/nightly/std/io/trait.Write.html
3082 [`debug_struct`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_struct
3083 [`debug_tuple`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_tuple
3084 [`debug_list`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_list
3085 [`debug_set`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_set
3086 [`debug_map`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_map
3087 [`Debug`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
3088 [strup]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_uppercase
3089 [strlow]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_lowercase
3090 [`to_uppercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_uppercase
3091 [`to_lowercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_lowercase
3092 [`PoisonError`]: https://doc.rust-lang.org/nightly/std/sync/struct.PoisonError.html
3093 [`RwLock`]: https://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html
3094 [`Mutex`]: https://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html
3095 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
3096 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
3097 [`Stdio`]: https://doc.rust-lang.org/nightly/std/process/struct.Stdio.html
3098 [`ChildStdin`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdin.html
3099 [`ChildStdout`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdout.html
3100 [`ChildStderr`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStderr.html
3101 [`io::ErrorKind`]: https://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html
3102 [debugfmt]: https://www.reddit.com/r/rust/comments/3ceaui/psa_produces_prettyprinted_debug_output/
3103 [`DerefMut`]: https://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
3104 [`mem::align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.align_of.html
3105 [align]: https://github.com/rust-lang/rust/pull/25646
3106 [`mem::min_align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.min_align_of.html
3107 [typos]: https://github.com/rust-lang/rust/pull/26087
3108 [nop]: https://github.com/rust-lang/rust/pull/26336
3109 [fat]: https://github.com/rust-lang/rust/pull/26411
3110 [dst]: https://github.com/rust-lang/rfcs/blob/master/text/0982-dst-coercion.md
3111 [parcodegen]: https://github.com/rust-lang/rust/pull/26018
3112 [packed]: https://github.com/rust-lang/rust/pull/25541
3113 [ad]: https://github.com/rust-lang/rust/pull/27382
3114 [win]: https://github.com/rust-lang/rust/pull/25350
3116 Version 1.1.0 (2015-06-25)
3117 =========================
3119 * ~850 changes, numerous bugfixes
3124 * The [`std::fs` module has been expanded][fs] to expand the set of
3125 functionality exposed:
3126 * `DirEntry` now supports optimizations like `file_type` and `metadata` which
3127 don't incur a syscall on some platforms.
3128 * A `symlink_metadata` function has been added.
3129 * The `fs::Metadata` structure now lowers to its OS counterpart, providing
3130 access to all underlying information.
3131 * The compiler now contains extended explanations of many errors. When an error
3132 with an explanation occurs the compiler suggests using the `--explain` flag
3133 to read the explanation. Error explanations are also [available online][err-index].
3134 * Thanks to multiple [improvements][sk] to [type checking][pre], as
3135 well as other work, the time to bootstrap the compiler decreased by
3141 * The [`str::split_whitespace`] method splits a string on unicode
3142 whitespace boundaries.
3143 * On both Windows and Unix, new extension traits provide conversion of
3144 I/O types to and from the underlying system handles. On Unix, these
3145 traits are [`FromRawFd`] and [`AsRawFd`], on Windows `FromRawHandle`
3146 and `AsRawHandle`. These are implemented for `File`, `TcpStream`,
3147 `TcpListener`, and `UpdSocket`. Further implementations for
3148 `std::process` will be stabilized later.
3149 * On Unix, [`std::os::unix::symlink`] creates symlinks. On
3150 Windows, symlinks can be created with
3151 `std::os::windows::symlink_dir` and
3152 `std::os::windows::symlink_file`.
3153 * The `mpsc::Receiver` type can now be converted into an iterator with
3154 `into_iter` on the [`IntoIterator`] trait.
3155 * `Ipv4Addr` can be created from `u32` with the `From<u32>`
3156 implementation of the [`From`] trait.
3157 * The `Debug` implementation for `RangeFull` [creates output that is
3158 more consistent with other implementations][rf].
3159 * [`Debug` is implemented for `File`][file].
3160 * The `Default` implementation for `Arc` [no longer requires `Sync +
3162 * [The `Iterator` methods `count`, `nth`, and `last` have been
3163 overridden for slices to have O(1) performance instead of O(n)][si].
3164 * Incorrect handling of paths on Windows has been improved in both the
3165 compiler and the standard library.
3166 * [`AtomicPtr` gained a `Default` implementation][ap].
3167 * In accordance with Rust's policy on arithmetic overflow `abs` now
3168 [panics on overflow when debug assertions are enabled][abs].
3169 * The [`Cloned`] iterator, which was accidentally left unstable for
3170 1.0 [has been stabilized][c].
3171 * The [`Incoming`] iterator, which iterates over incoming TCP
3172 connections, and which was accidentally unnamable in 1.0, [is now
3173 properly exported][inc].
3174 * [`BinaryHeap`] no longer corrupts itself [when functions called by
3175 `sift_up` or `sift_down` panic][bh].
3176 * The [`split_off`] method of `LinkedList` [no longer corrupts
3177 the list in certain scenarios][ll].
3182 * Type checking performance [has improved notably][sk] with
3183 [multiple improvements][pre].
3184 * The compiler [suggests code changes][ch] for more errors.
3185 * rustc and it's build system have experimental support for [building
3186 toolchains against MUSL][m] instead of glibc on Linux.
3187 * The compiler defines the `target_env` cfg value, which is used for
3188 distinguishing toolchains that are otherwise for the same
3189 platform. Presently this is set to `gnu` for common GNU Linux
3190 targets and for MinGW targets, and `musl` for MUSL Linux targets.
3191 * The [`cargo rustc`][crc] command invokes a build with custom flags
3193 * [Android executables are always position independent][pie].
3194 * [The `drop_with_repr_extern` lint warns about mixing `repr(C)`
3197 [`str::split_whitespace`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_whitespace
3198 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
3199 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
3200 [`std::os::unix::symlink`]: https://doc.rust-lang.org/nightly/std/os/unix/fs/fn.symlink.html
3201 [`IntoIterator`]: https://doc.rust-lang.org/nightly/std/iter/trait.IntoIterator.html
3202 [`From`]: https://doc.rust-lang.org/nightly/std/convert/trait.From.html
3203 [rf]: https://github.com/rust-lang/rust/pull/24491
3204 [err-index]: https://doc.rust-lang.org/error-index.html
3205 [sk]: https://github.com/rust-lang/rust/pull/24615
3206 [pre]: https://github.com/rust-lang/rust/pull/25323
3207 [file]: https://github.com/rust-lang/rust/pull/24598
3208 [ch]: https://github.com/rust-lang/rust/pull/24683
3209 [arc]: https://github.com/rust-lang/rust/pull/24695
3210 [si]: https://github.com/rust-lang/rust/pull/24701
3211 [ap]: https://github.com/rust-lang/rust/pull/24834
3212 [m]: https://github.com/rust-lang/rust/pull/24777
3213 [fs]: https://github.com/rust-lang/rfcs/blob/master/text/1044-io-fs-2.1.md
3214 [crc]: https://github.com/rust-lang/cargo/pull/1568
3215 [pie]: https://github.com/rust-lang/rust/pull/24953
3216 [abs]: https://github.com/rust-lang/rust/pull/25441
3217 [c]: https://github.com/rust-lang/rust/pull/25496
3218 [`Cloned`]: https://doc.rust-lang.org/nightly/std/iter/struct.Cloned.html
3219 [`Incoming`]: https://doc.rust-lang.org/nightly/std/net/struct.Incoming.html
3220 [inc]: https://github.com/rust-lang/rust/pull/25522
3221 [bh]: https://github.com/rust-lang/rust/pull/25856
3222 [`BinaryHeap`]: https://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html
3223 [ll]: https://github.com/rust-lang/rust/pull/26022
3224 [`split_off`]: https://doc.rust-lang.org/nightly/collections/linked_list/struct.LinkedList.html#method.split_off
3225 [drop]: https://github.com/rust-lang/rust/pull/24935
3227 Version 1.0.0 (2015-05-15)
3228 ========================
3230 * ~1500 changes, numerous bugfixes
3235 * The vast majority of the standard library is now `#[stable]`. It is
3236 no longer possible to use unstable features with a stable build of
3238 * Many popular crates on [crates.io] now work on the stable release
3240 * Arithmetic on basic integer types now [checks for overflow in debug
3246 * Several [restrictions have been added to trait coherence][coh] in
3247 order to make it easier for upstream authors to change traits
3248 without breaking downstream code.
3249 * Digits of binary and octal literals are [lexed more eagerly][lex] to
3250 improve error messages and macro behavior. For example, `0b1234` is
3251 now lexed as `0b1234` instead of two tokens, `0b1` and `234`.
3252 * Trait bounds [are always invariant][inv], eliminating the need for
3253 the `PhantomFn` and `MarkerTrait` lang items, which have been
3255 * ["-" is no longer a valid character in crate names][cr], the `extern crate
3256 "foo" as bar` syntax has been replaced with `extern crate foo as
3257 bar`, and Cargo now automatically translates "-" in *package* names
3258 to underscore for the crate name.
3259 * [Lifetime shadowing is an error][lt].
3260 * [`Send` no longer implies `'static`][send-rfc].
3261 * [UFCS now supports trait-less associated paths][moar-ufcs] like
3262 `MyType::default()`.
3263 * Primitive types [now have inherent methods][prim-inherent],
3264 obviating the need for extension traits like `SliceExt`.
3265 * Methods with `Self: Sized` in their `where` clause are [considered
3266 object-safe][self-sized], allowing many extension traits like
3267 `IteratorExt` to be merged into the traits they extended.
3268 * You can now [refer to associated types][assoc-where] whose
3269 corresponding trait bounds appear only in a `where` clause.
3270 * The final bits of [OIBIT landed][oibit-final], meaning that traits
3271 like `Send` and `Sync` are now library-defined.
3272 * A [Reflect trait][reflect] was introduced, which means that
3273 downcasting via the `Any` trait is effectively limited to concrete
3274 types. This helps retain the potentially-important "parametricity"
3275 property: generic code cannot behave differently for different type
3276 arguments except in minor ways.
3277 * The `unsafe_destructor` feature is now deprecated in favor of the
3278 [new `dropck`][dropck]. This change is a major reduction in unsafe
3284 * The `thread_local` module [has been renamed to `std::thread`][th].
3285 * The methods of `IteratorExt` [have been moved to the `Iterator`
3287 * Several traits that implement Rust's conventions for type
3288 conversions, `AsMut`, `AsRef`, `From`, and `Into` have been
3289 [centralized in the `std::convert` module][con].
3290 * The `FromError` trait [was removed in favor of `From`][fe].
3291 * The basic sleep function [has moved to
3292 `std::thread::sleep_ms`][slp].
3293 * The `splitn` function now takes an `n` parameter that represents the
3294 number of items yielded by the returned iterator [instead of the
3295 number of 'splits'][spl].
3296 * [On Unix, all file descriptors are `CLOEXEC` by default][clo].
3297 * [Derived implementations of `PartialOrd` now order enums according
3298 to their explicitly-assigned discriminants][po].
3299 * [Methods for searching strings are generic over `Pattern`s][pat],
3300 implemented presently by `&char`, `&str`, `FnMut(char) -> bool` and
3302 * [In method resolution, object methods are resolved before inherent
3304 * [`String::from_str` has been deprecated in favor of the `From` impl,
3305 `String::from`][sf].
3306 * [`io::Error` implements `Sync`][ios].
3307 * [The `words` method on `&str` has been replaced with
3308 `split_whitespace`][sw], to avoid answering the tricky question, 'what is
3310 * The new path and IO modules are complete and `#[stable]`. This
3311 was the major library focus for this cycle.
3312 * The path API was [revised][path-normalize] to normalize `.`,
3313 adjusting the tradeoffs in favor of the most common usage.
3314 * A large number of remaining APIs in `std` were also stabilized
3315 during this cycle; about 75% of the non-deprecated API surface
3317 * The new [string pattern API][string-pattern] landed, which makes
3318 the string slice API much more internally consistent and flexible.
3319 * A new set of [generic conversion traits][conversion] replaced
3320 many existing ad hoc traits.
3321 * Generic numeric traits were [completely removed][num-traits]. This
3322 was made possible thanks to inherent methods for primitive types,
3323 and the removal gives maximal flexibility for designing a numeric
3324 hierarchy in the future.
3325 * The `Fn` traits are now related via [inheritance][fn-inherit]
3326 and provide ergonomic [blanket implementations][fn-blanket].
3327 * The `Index` and `IndexMut` traits were changed to
3328 [take the index by value][index-value], enabling code like
3329 `hash_map["string"]` to work.
3330 * `Copy` now [inherits][copy-clone] from `Clone`, meaning that all
3331 `Copy` data is known to be `Clone` as well.
3336 * Many errors now have extended explanations that can be accessed with
3337 the `--explain` flag to `rustc`.
3338 * Many new examples have been added to the standard library
3340 * rustdoc has received a number of improvements focused on completion
3342 * Metadata was tuned, shrinking binaries [by 27%][metadata-shrink].
3343 * Much headway was made on ecosystem-wide CI, making it possible
3344 to [compare builds for breakage][ci-compare].
3347 [crates.io]: http://crates.io
3348 [clo]: https://github.com/rust-lang/rust/pull/24034
3349 [coh]: https://github.com/rust-lang/rfcs/blob/master/text/1023-rebalancing-coherence.md
3350 [con]: https://github.com/rust-lang/rust/pull/23875
3351 [cr]: https://github.com/rust-lang/rust/pull/23419
3352 [fe]: https://github.com/rust-lang/rust/pull/23879
3353 [ie]: https://github.com/rust-lang/rust/pull/23300
3354 [inv]: https://github.com/rust-lang/rust/pull/23938
3355 [ios]: https://github.com/rust-lang/rust/pull/24133
3356 [lex]: https://github.com/rust-lang/rfcs/blob/master/text/0879-small-base-lexing.md
3357 [lt]: https://github.com/rust-lang/rust/pull/24057
3358 [meth]: https://github.com/rust-lang/rust/pull/24056
3359 [pat]: https://github.com/rust-lang/rfcs/blob/master/text/0528-string-patterns.md
3360 [po]: https://github.com/rust-lang/rust/pull/24270
3361 [sf]: https://github.com/rust-lang/rust/pull/24517
3362 [slp]: https://github.com/rust-lang/rust/pull/23949
3363 [spl]: https://github.com/rust-lang/rfcs/blob/master/text/0979-align-splitn-with-other-languages.md
3364 [sw]: https://github.com/rust-lang/rfcs/blob/master/text/1054-str-words.md
3365 [th]: https://github.com/rust-lang/rfcs/blob/master/text/0909-move-thread-local-to-std-thread.md
3366 [send-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0458-send-improvements.md
3367 [moar-ufcs]: https://github.com/rust-lang/rust/pull/22172
3368 [prim-inherent]: https://github.com/rust-lang/rust/pull/23104
3369 [overflow]: https://github.com/rust-lang/rfcs/blob/master/text/0560-integer-overflow.md
3370 [metadata-shrink]: https://github.com/rust-lang/rust/pull/22971
3371 [self-sized]: https://github.com/rust-lang/rust/pull/22301
3372 [assoc-where]: https://github.com/rust-lang/rust/pull/22512
3373 [string-pattern]: https://github.com/rust-lang/rust/pull/22466
3374 [oibit-final]: https://github.com/rust-lang/rust/pull/21689
3375 [reflect]: https://github.com/rust-lang/rust/pull/23712
3376 [conversion]: https://github.com/rust-lang/rfcs/pull/529
3377 [num-traits]: https://github.com/rust-lang/rust/pull/23549
3378 [index-value]: https://github.com/rust-lang/rust/pull/23601
3379 [dropck]: https://github.com/rust-lang/rfcs/pull/769
3380 [ci-compare]: https://gist.github.com/brson/a30a77836fbec057cbee
3381 [fn-inherit]: https://github.com/rust-lang/rust/pull/23282
3382 [fn-blanket]: https://github.com/rust-lang/rust/pull/23895
3383 [copy-clone]: https://github.com/rust-lang/rust/pull/23860
3384 [path-normalize]: https://github.com/rust-lang/rust/pull/23229
3387 Version 1.0.0-alpha.2 (2015-02-20)
3388 =====================================
3390 * ~1300 changes, numerous bugfixes
3394 * The various I/O modules were [overhauled][io-rfc] to reduce
3395 unnecessary abstractions and provide better interoperation with
3396 the underlying platform. The old `io` module remains temporarily
3398 * The standard library now [participates in feature gating][feat],
3399 so use of unstable libraries now requires a `#![feature(...)]`
3400 attribute. The impact of this change is [described on the
3401 forum][feat-forum]. [RFC][feat-rfc].
3405 * `for` loops [now operate on the `IntoIterator` trait][into],
3406 which eliminates the need to call `.iter()`, etc. to iterate
3407 over collections. There are some new subtleties to remember
3408 though regarding what sort of iterators various types yield, in
3409 particular that `for foo in bar { }` yields values from a move
3410 iterator, destroying the original collection. [RFC][into-rfc].
3411 * Objects now have [default lifetime bounds][obj], so you don't
3412 have to write `Box<Trait+'static>` when you don't care about
3413 storing references. [RFC][obj-rfc].
3414 * In types that implement `Drop`, [lifetimes must outlive the
3415 value][drop]. This will soon make it possible to safely
3416 implement `Drop` for types where `#[unsafe_destructor]` is now
3417 required. Read the [gorgeous RFC][drop-rfc] for details.
3418 * The fully qualified <T as Trait>::X syntax lets you set the Self
3419 type for a trait method or associated type. [RFC][ufcs-rfc].
3420 * References to types that implement `Deref<U>` now [automatically
3421 coerce to references][deref] to the dereferenced type `U`,
3422 e.g. `&T where T: Deref<U>` automatically coerces to `&U`. This
3423 should eliminate many unsightly uses of `&*`, as when converting
3424 from references to vectors into references to
3425 slices. [RFC][deref-rfc].
3426 * The explicit [closure kind syntax][close] (`|&:|`, `|&mut:|`,
3427 `|:|`) is obsolete and closure kind is inferred from context.
3428 * [`Self` is a keyword][Self].
3432 * The `Show` and `String` formatting traits [have been
3433 renamed][fmt] to `Debug` and `Display` to more clearly reflect
3434 their related purposes. Automatically getting a string
3435 conversion to use with `format!("{:?}", something_to_debug)` is
3436 now written `#[derive(Debug)]`.
3437 * Abstract [OS-specific string types][osstr], `std::ff::{OsString,
3438 OsStr}`, provide strings in platform-specific encodings for easier
3439 interop with system APIs. [RFC][osstr-rfc].
3440 * The `boxed::into_raw` and `Box::from_raw` functions [convert
3441 between `Box<T>` and `*mut T`][boxraw], a common pattern for
3442 creating raw pointers.
3446 * Certain long error messages of the form 'expected foo found bar'
3447 are now [split neatly across multiple
3448 lines][multiline]. Examples in the PR.
3449 * On Unix Rust can be [uninstalled][un] by running
3450 `/usr/local/lib/rustlib/uninstall.sh`.
3451 * The `#[rustc_on_unimplemented]` attribute, requiring the
3452 'on_unimplemented' feature, lets rustc [display custom error
3453 messages when a trait is expected to be implemented for a type
3458 * Rust is tested against a [LALR grammar][lalr], which parses
3459 almost all the Rust files that rustc does.
3461 [boxraw]: https://github.com/rust-lang/rust/pull/21318
3462 [close]: https://github.com/rust-lang/rust/pull/21843
3463 [deref]: https://github.com/rust-lang/rust/pull/21351
3464 [deref-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0241-deref-conversions.md
3465 [drop]: https://github.com/rust-lang/rust/pull/21972
3466 [drop-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
3467 [feat]: https://github.com/rust-lang/rust/pull/21248
3468 [feat-forum]: https://users.rust-lang.org/t/psa-important-info-about-rustcs-new-feature-staging/82/5
3469 [feat-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0507-release-channels.md
3470 [fmt]: https://github.com/rust-lang/rust/pull/21457
3471 [into]: https://github.com/rust-lang/rust/pull/20790
3472 [into-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md#intoiterator-and-iterable
3473 [io-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
3474 [lalr]: https://github.com/rust-lang/rust/pull/21452
3475 [multiline]: https://github.com/rust-lang/rust/pull/19870
3476 [obj]: https://github.com/rust-lang/rust/pull/22230
3477 [obj-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0599-default-object-bound.md
3478 [onun]: https://github.com/rust-lang/rust/pull/20889
3479 [osstr]: https://github.com/rust-lang/rust/pull/21488
3480 [osstr-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
3481 [Self]: https://github.com/rust-lang/rust/pull/22158
3482 [ufcs-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0132-ufcs.md
3483 [un]: https://github.com/rust-lang/rust/pull/22256
3486 Version 1.0.0-alpha (2015-01-09)
3487 ==================================
3489 * ~2400 changes, numerous bugfixes
3493 * The language itself is considered feature complete for 1.0,
3494 though there will be many usability improvements and bugfixes
3495 before the final release.
3496 * Nearly 50% of the public API surface of the standard library has
3497 been declared 'stable'. Those interfaces are unlikely to change
3499 * The long-running debate over integer types has been
3500 [settled][ints]: Rust will ship with types named `isize` and
3501 `usize`, rather than `int` and `uint`, for pointer-sized
3502 integers. Guidelines will be rolled out during the alpha cycle.
3503 * Most crates that are not `std` have been moved out of the Rust
3504 distribution into the Cargo ecosystem so they can evolve
3505 separately and don't need to be stabilized as quickly, including
3506 'time', 'getopts', 'num', 'regex', and 'term'.
3507 * Documentation continues to be expanded with more API coverage, more
3508 examples, and more in-depth explanations. The guides have been
3509 consolidated into [The Rust Programming Language][trpl].
3510 * "[Rust By Example][rbe]" is now maintained by the Rust team.
3511 * All official Rust binary installers now come with [Cargo], the
3512 Rust package manager.
3516 * Closures have been [completely redesigned][unboxed] to be
3517 implemented in terms of traits, can now be used as generic type
3518 bounds and thus monomorphized and inlined, or via an opaque
3519 pointer (boxed) as in the old system. The new system is often
3520 referred to as 'unboxed' closures.
3521 * Traits now support [associated types][assoc], allowing families
3522 of related types to be defined together and used generically in
3524 * Enum variants are [namespaced by their type names][enum].
3525 * [`where` clauses][where] provide a more versatile and attractive
3526 syntax for specifying generic bounds, though the previous syntax
3528 * Rust again picks a [fallback][fb] (either i32 or f64) for uninferred
3530 * Rust [no longer has a runtime][rt] of any description, and only
3531 supports OS threads, not green threads.
3532 * At long last, Rust has been overhauled for 'dynamically-sized
3533 types' ([DST]), which integrates 'fat pointers' (object types,
3534 arrays, and `str`) more deeply into the type system, making it
3536 * Rust now has a general [range syntax][range], `i..j`, `i..`, and
3537 `..j` that produce range types and which, when combined with the
3538 `Index` operator and multidispatch, leads to a convenient slice
3540 * The new range syntax revealed an ambiguity in the fixed-length
3541 array syntax, so now fixed length arrays [are written `[T;
3543 * The `Copy` trait is no longer implemented automatically. Unsafe
3544 pointers no longer implement `Sync` and `Send` so types
3545 containing them don't automatically either. `Sync` and `Send`
3546 are now 'unsafe traits' so one can "forcibly" implement them via
3547 `unsafe impl` if a type confirms to the requirements for them
3548 even though the internals do not (e.g. structs containing unsafe
3549 pointers like `Arc`). These changes are intended to prevent some
3550 footguns and are collectively known as [opt-in built-in
3551 traits][oibit] (though `Sync` and `Send` will soon become pure
3552 library types unknown to the compiler).
3553 * Operator traits now take their operands [by value][ops], and
3554 comparison traits can use multidispatch to compare one type
3555 against multiple other types, allowing e.g. `String` to be
3556 compared with `&str`.
3557 * `if let` and `while let` are no longer feature-gated.
3558 * Rust has adopted a more [uniform syntax for escaping unicode
3559 characters][unicode].
3560 * `macro_rules!` [has been declared stable][mac]. Though it is a
3561 flawed system it is sufficiently popular that it must be usable
3562 for 1.0. Effort has gone into [future-proofing][mac-future] it
3563 in ways that will allow other macro systems to be developed in
3564 parallel, and won't otherwise impact the evolution of the
3566 * The prelude has been [pared back significantly][prelude] such
3567 that it is the minimum necessary to support the most pervasive
3568 code patterns, and through [generalized where clauses][where]
3569 many of the prelude extension traits have been consolidated.
3570 * Rust's rudimentary reflection [has been removed][refl], as it
3571 incurred too much code generation for little benefit.
3572 * [Struct variants][structvars] are no longer feature-gated.
3573 * Trait bounds can be [polymorphic over lifetimes][hrtb]. Also
3574 known as 'higher-ranked trait bounds', this crucially allows
3575 unboxed closures to work.
3576 * Macros invocations surrounded by parens or square brackets and
3577 not terminated by a semicolon are [parsed as
3578 expressions][macros], which makes expressions like `vec![1i32,
3579 2, 3].len()` work as expected.
3580 * Trait objects now implement their traits automatically, and
3581 traits that can be coerced to objects now must be [object
3583 * Automatically deriving traits is now done with `#[derive(...)]`
3584 not `#[deriving(...)]` for [consistency with other naming
3585 conventions][derive].
3586 * Importing the containing module or enum at the same time as
3587 items or variants they contain is [now done with `self` instead
3588 of `mod`][self], as in use `foo::{self, bar}`
3589 * Glob imports are no longer feature-gated.
3590 * The `box` operator and `box` patterns have been feature-gated
3591 pending a redesign. For now unique boxes should be allocated
3592 like other containers, with `Box::new`.
3596 * A [series][coll1] of [efforts][coll2] to establish
3597 [conventions][coll3] for collections types has resulted in API
3598 improvements throughout the standard library.
3599 * New [APIs for error handling][err] provide ergonomic interop
3600 between error types, and [new conventions][err-conv] describe
3601 more clearly the recommended error handling strategies in Rust.
3602 * The `fail!` macro has been renamed to [`panic!`][panic] so that
3603 it is easier to discuss failure in the context of error handling
3604 without making clarifications as to whether you are referring to
3605 the 'fail' macro or failure more generally.
3606 * On Linux, `OsRng` prefers the new, more reliable `getrandom`
3607 syscall when available.
3608 * The 'serialize' crate has been renamed 'rustc-serialize' and
3609 moved out of the distribution to Cargo. Although it is widely
3610 used now, it is expected to be superseded in the near future.
3611 * The `Show` formatter, typically implemented with
3612 `#[derive(Show)]` is [now requested with the `{:?}`
3613 specifier][show] and is intended for use by all types, for uses
3614 such as `println!` debugging. The new `String` formatter must be
3615 implemented by hand, uses the `{}` specifier, and is intended
3616 for full-fidelity conversions of things that can logically be
3617 represented as strings.
3621 * [Flexible target specification][flex] allows rustc's code
3622 generation to be configured to support otherwise-unsupported
3624 * Rust comes with rust-gdb and rust-lldb scripts that launch their
3625 respective debuggers with Rust-appropriate pretty-printing.
3626 * The Windows installation of Rust is distributed with the
3627 MinGW components currently required to link binaries on that
3632 * Nullable enum optimizations have been extended to more types so
3633 that e.g. `Option<Vec<T>>` and `Option<String>` take up no more
3634 space than the inner types themselves.
3635 * Work has begun on supporting AArch64.
3637 [Cargo]: https://crates.io
3638 [unboxed]: http://smallcultfollowing.com/babysteps/blog/2014/11/26/purging-proc/
3639 [enum]: https://github.com/rust-lang/rfcs/blob/master/text/0390-enum-namespacing.md
3640 [flex]: https://github.com/rust-lang/rfcs/blob/master/text/0131-target-specification.md
3641 [err]: https://github.com/rust-lang/rfcs/blob/master/text/0201-error-chaining.md
3642 [err-conv]: https://github.com/rust-lang/rfcs/blob/master/text/0236-error-conventions.md
3643 [rt]: https://github.com/rust-lang/rfcs/blob/master/text/0230-remove-runtime.md
3644 [mac]: https://github.com/rust-lang/rfcs/blob/master/text/0453-macro-reform.md
3645 [mac-future]: https://github.com/rust-lang/rfcs/pull/550
3646 [DST]: http://smallcultfollowing.com/babysteps/blog/2014/01/05/dst-take-5/
3647 [coll1]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md
3648 [coll2]: https://github.com/rust-lang/rfcs/blob/master/text/0509-collections-reform-part-2.md
3649 [coll3]: https://github.com/rust-lang/rfcs/blob/master/text/0216-collection-views.md
3650 [ops]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md
3651 [prelude]: https://github.com/rust-lang/rfcs/blob/master/text/0503-prelude-stabilization.md
3652 [where]: https://github.com/rust-lang/rfcs/blob/master/text/0135-where.md
3653 [refl]: https://github.com/rust-lang/rfcs/blob/master/text/0379-remove-reflection.md
3654 [panic]: https://github.com/rust-lang/rfcs/blob/master/text/0221-panic.md
3655 [structvars]: https://github.com/rust-lang/rfcs/blob/master/text/0418-struct-variants.md
3656 [hrtb]: https://github.com/rust-lang/rfcs/blob/master/text/0387-higher-ranked-trait-bounds.md
3657 [unicode]: https://github.com/rust-lang/rfcs/blob/master/text/0446-es6-unicode-escapes.md
3658 [oibit]: https://github.com/rust-lang/rfcs/blob/master/text/0019-opt-in-builtin-traits.md
3659 [macros]: https://github.com/rust-lang/rfcs/blob/master/text/0378-expr-macros.md
3660 [range]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md#indexing-and-slicing
3661 [arrays]: https://github.com/rust-lang/rfcs/blob/master/text/0520-new-array-repeat-syntax.md
3662 [show]: https://github.com/rust-lang/rfcs/blob/master/text/0504-show-stabilization.md
3663 [derive]: https://github.com/rust-lang/rfcs/blob/master/text/0534-deriving2derive.md
3664 [self]: https://github.com/rust-lang/rfcs/blob/master/text/0532-self-in-use.md
3665 [fb]: https://github.com/rust-lang/rfcs/blob/master/text/0212-restore-int-fallback.md
3666 [objsafe]: https://github.com/rust-lang/rfcs/blob/master/text/0255-object-safety.md
3667 [assoc]: https://github.com/rust-lang/rfcs/blob/master/text/0195-associated-items.md
3668 [ints]: https://github.com/rust-lang/rfcs/pull/544#issuecomment-68760871
3669 [trpl]: https://doc.rust-lang.org/book/index.html
3670 [rbe]: http://rustbyexample.com/
3673 Version 0.12.0 (2014-10-09)
3674 =============================
3676 * ~1900 changes, numerous bugfixes
3680 * The introductory documentation (now called The Rust Guide) has
3681 been completely rewritten, as have a number of supplementary
3683 * Rust's package manager, Cargo, continues to improve and is
3684 sometimes considered to be quite awesome.
3685 * Many API's in `std` have been reviewed and updated for
3686 consistency with the in-development Rust coding
3687 guidelines. The standard library documentation tracks
3688 stabilization progress.
3689 * Minor libraries have been moved out-of-tree to the rust-lang org
3690 on GitHub: uuid, semver, glob, num, hexfloat, fourcc. They can
3691 be installed with Cargo.
3692 * Lifetime elision allows lifetime annotations to be left off of
3693 function declarations in many common scenarios.
3694 * Rust now works on 64-bit Windows.
3697 * Indexing can be overloaded with the `Index` and `IndexMut`
3699 * The `if let` construct takes a branch only if the `let` pattern
3700 matches, currently behind the 'if_let' feature gate.
3701 * 'where clauses', a more flexible syntax for specifying trait
3702 bounds that is more aesthetic, have been added for traits and
3703 free functions. Where clauses will in the future make it
3704 possible to constrain associated types, which would be
3705 impossible with the existing syntax.
3706 * A new slicing syntax (e.g. `[0..4]`) has been introduced behind
3707 the 'slicing_syntax' feature gate, and can be overloaded with
3708 the `Slice` or `SliceMut` traits.
3709 * The syntax for matching of sub-slices has been changed to use a
3710 postfix `..` instead of prefix (.e.g. `[a, b, c..]`), for
3711 consistency with other uses of `..` and to future-proof
3712 potential additional uses of the syntax.
3713 * The syntax for matching inclusive ranges in patterns has changed
3714 from `0..3` to `0...4` to be consistent with the exclusive range
3716 * Matching of sub-slices in non-tail positions (e.g. `[a.., b,
3717 c]`) has been put behind the 'advanced_slice_patterns' feature
3718 gate and may be removed in the future.
3719 * Components of tuples and tuple structs can be extracted using
3720 the `value.0` syntax, currently behind the `tuple_indexing`
3722 * The `#[crate_id]` attribute is no longer supported; versioning
3723 is handled by the package manager.
3724 * Renaming crate imports are now written `extern crate foo as bar`
3725 instead of `extern crate bar = foo`.
3726 * Renaming use statements are now written `use foo as bar` instead
3728 * `let` and `match` bindings and argument names in macros are now
3730 * The new, more efficient, closure types ('unboxed closures') have
3731 been added under a feature gate, 'unboxed_closures'. These will
3732 soon replace the existing closure types, once higher-ranked
3733 trait lifetimes are added to the language.
3734 * `move` has been added as a keyword, for indicating closures
3735 that capture by value.
3736 * Mutation and assignment is no longer allowed in pattern guards.
3737 * Generic structs and enums can now have trait bounds.
3738 * The `Share` trait is now called `Sync` to free up the term
3739 'shared' to refer to 'shared reference' (the default reference
3741 * Dynamically-sized types have been mostly implemented,
3742 unifying the behavior of fat-pointer types with the rest of the
3744 * As part of dynamically-sized types, the `Sized` trait has been
3745 introduced, which qualifying types implement by default, and
3746 which type parameters expect by default. To specify that a type
3747 parameter does not need to be sized, write `<Sized? T>`. Most
3748 types are `Sized`, notable exceptions being unsized arrays
3749 (`[T]`) and trait types.
3750 * Closures can return `!`, as in `|| -> !` or `proc() -> !`.
3751 * Lifetime bounds can now be applied to type parameters and object
3753 * The old, reference counted GC type, `Gc<T>` which was once
3754 denoted by the `@` sigil, has finally been removed. GC will be
3755 revisited in the future.
3758 * Library documentation has been improved for a number of modules.
3759 * Bit-vectors, collections::bitv has been modernized.
3760 * The url crate is deprecated in favor of
3761 http://github.com/servo/rust-url, which can be installed with
3763 * Most I/O stream types can be cloned and subsequently closed from
3765 * A `std::time::Duration` type has been added for use in I/O
3766 methods that rely on timers, as well as in the 'time' crate's
3767 `Timespec` arithmetic.
3768 * The runtime I/O abstraction layer that enabled the green thread
3769 scheduler to do non-thread-blocking I/O has been removed, along
3770 with the libuv-based implementation employed by the green thread
3771 scheduler. This will greatly simplify the future I/O work.
3772 * `collections::btree` has been rewritten to have a more
3773 idiomatic and efficient design.
3776 * rustdoc output now indicates the stability levels of API's.
3777 * The `--crate-name` flag can specify the name of the crate
3778 being compiled, like `#[crate_name]`.
3779 * The `-C metadata` specifies additional metadata to hash into
3780 symbol names, and `-C extra-filename` specifies additional
3781 information to put into the output filename, for use by the
3782 package manager for versioning.
3783 * debug info generation has continued to improve and should be
3784 more reliable under both gdb and lldb.
3785 * rustc has experimental support for compiling in parallel
3786 using the `-C codegen-units` flag.
3787 * rustc no longer encodes rpath information into binaries by
3791 * Stack usage has been optimized with LLVM lifetime annotations.
3792 * Official Rust binaries on Linux are more compatible with older
3793 kernels and distributions, built on CentOS 5.10.
3796 Version 0.11.0 (2014-07-02)
3797 ==========================
3799 * ~1700 changes, numerous bugfixes
3802 * ~[T] has been removed from the language. This type is superseded by
3804 * ~str has been removed from the language. This type is superseded by
3806 * ~T has been removed from the language. This type is superseded by the
3808 * @T has been removed from the language. This type is superseded by the
3809 standard library's std::gc::Gc<T> type.
3810 * Struct fields are now all private by default.
3811 * Vector indices and shift amounts are both required to be a `uint`
3812 instead of any integral type.
3813 * Byte character, byte string, and raw byte string literals are now all
3814 supported by prefixing the normal literal with a `b`.
3815 * Multiple ABIs are no longer allowed in an ABI string
3816 * The syntax for lifetimes on closures/procedures has been tweaked
3817 slightly: `<'a>|A, B|: 'b + K -> T`
3818 * Floating point modulus has been removed from the language; however it
3819 is still provided by a library implementation.
3820 * Private enum variants are now disallowed.
3821 * The `priv` keyword has been removed from the language.
3822 * A closure can no longer be invoked through a &-pointer.
3823 * The `use foo, bar, baz;` syntax has been removed from the language.
3824 * The transmute intrinsic no longer works on type parameters.
3825 * Statics now allow blocks/items in their definition.
3826 * Trait bounds are separated from objects with + instead of : now.
3827 * Objects can no longer be read while they are mutably borrowed.
3828 * The address of a static is now marked as insignificant unless the
3829 #[inline(never)] attribute is placed it.
3830 * The #[unsafe_destructor] attribute is now behind a feature gate.
3831 * Struct literals are no longer allowed in ambiguous positions such as
3832 if, while, match, and for..in.
3833 * Declaration of lang items and intrinsics are now feature-gated by
3835 * Integral literals no longer default to `int`, and floating point
3836 literals no longer default to `f64`. Literals must be suffixed with an
3837 appropriate type if inference cannot determine the type of the
3839 * The Box<T> type is no longer implicitly borrowed to &mut T.
3840 * Procedures are now required to not capture borrowed references.
3843 * The standard library is now a "facade" over a number of underlying
3844 libraries. This means that development on the standard library should
3845 be speeder due to smaller crates, as well as a clearer line between
3847 * A new library, libcore, lives under the standard library's facade
3848 which is Rust's "0-assumption" library, suitable for embedded and
3849 kernel development for example.
3850 * A regex crate has been added to the standard distribution. This crate
3851 includes statically compiled regular expressions.
3852 * The unwrap/unwrap_err methods on Result require a Show bound for
3853 better error messages.
3854 * The return types of the std::comm primitives have been centralized
3855 around the Result type.
3856 * A number of I/O primitives have gained the ability to time out their
3858 * A number of I/O primitives have gained the ability to close their
3859 reading/writing halves to cancel pending operations.
3860 * Reverse iterator methods have been removed in favor of `rev()` on
3861 their forward-iteration counterparts.
3862 * A bitflags! macro has been added to enable easy interop with C and
3863 management of bit flags.
3864 * A debug_assert! macro is now provided which is disabled when
3865 `--cfg ndebug` is passed to the compiler.
3866 * A graphviz crate has been added for creating .dot files.
3867 * The std::cast module has been migrated into std::mem.
3868 * The std::local_data api has been migrated from freestanding functions
3869 to being based on methods.
3870 * The Pod trait has been renamed to Copy.
3871 * jemalloc has been added as the default allocator for types.
3872 * The API for allocating memory has been changed to use proper alignment
3873 and sized deallocation
3874 * Connecting a TcpStream or binding a TcpListener is now based on a
3875 string address and a u16 port. This allows connecting to a hostname as
3877 * The Reader trait now contains a core method, read_at_least(), which
3878 correctly handles many repeated 0-length reads.
3879 * The process-spawning API is now centered around a builder-style
3881 * The :? printing qualifier has been moved from the standard library to
3882 an external libdebug crate.
3883 * Eq/Ord have been renamed to PartialEq/PartialOrd. TotalEq/TotalOrd
3884 have been renamed to Eq/Ord.
3885 * The select/plural methods have been removed from format!. The escapes
3886 for { and } have also changed from \{ and \} to {{ and }},
3888 * The TaskBuilder API has been re-worked to be a true builder, and
3889 extension traits for spawning native/green tasks have been added.
3892 * All breaking changes to the language or libraries now have their
3893 commit message annotated with `[breaking-change]` to allow for easy
3894 discovery of breaking changes.
3895 * The compiler will now try to suggest how to annotate lifetimes if a
3896 lifetime-related error occurs.
3897 * Debug info continues to be improved greatly with general bug fixes and
3898 better support for situations like link time optimization (LTO).
3899 * Usage of syntax extensions when cross-compiling has been fixed.
3900 * Functionality equivalent to GCC & Clang's -ffunction-sections,
3901 -fdata-sections and --gc-sections has been enabled by default
3902 * The compiler is now stricter about where it will load module files
3903 from when a module is declared via `mod foo;`.
3904 * The #[phase(syntax)] attribute has been renamed to #[phase(plugin)].
3905 Syntax extensions are now discovered via a "plugin registrar" type
3906 which will be extended in the future to other various plugins.
3907 * Lints have been restructured to allow for dynamically loadable lints.
3908 * A number of rustdoc improvements:
3909 * The HTML output has been visually redesigned.
3910 * Markdown is now powered by hoedown instead of sundown.
3911 * Searching heuristics have been greatly improved.
3912 * The search index has been reduced in size by a great amount.
3913 * Cross-crate documentation via `pub use` has been greatly improved.
3914 * Primitive types are now hyperlinked and documented.
3915 * Documentation has been moved from static.rust-lang.org/doc to
3917 * A new sandbox, play.rust-lang.org, is available for running and
3918 sharing rust code examples on-line.
3919 * Unused attributes are now more robustly warned about.
3920 * The dead_code lint now warns about unused struct fields.
3921 * Cross-compiling to iOS is now supported.
3922 * Cross-compiling to mipsel is now supported.
3923 * Stability attributes are now inherited by default and no longer apply
3924 to intra-crate usage, only inter-crate usage.
3925 * Error message related to non-exhaustive match expressions have been
3929 Version 0.10 (2014-04-03)
3930 =========================
3932 * ~1500 changes, numerous bugfixes
3935 * A new RFC process is now in place for modifying the language.
3936 * Patterns with `@`-pointers have been removed from the language.
3937 * Patterns with unique vectors (`~[T]`) have been removed from the
3939 * Patterns with unique strings (`~str`) have been removed from the
3941 * `@str` has been removed from the language.
3942 * `@[T]` has been removed from the language.
3943 * `@self` has been removed from the language.
3944 * `@Trait` has been removed from the language.
3945 * Headers on `~` allocations which contain `@` boxes inside the type for
3946 reference counting have been removed.
3947 * The semantics around the lifetimes of temporary expressions have changed,
3948 see #3511 and #11585 for more information.
3949 * Cross-crate syntax extensions are now possible, but feature gated. See
3950 #11151 for more information. This includes both `macro_rules!` macros as
3951 well as syntax extensions such as `format!`.
3952 * New lint modes have been added, and older ones have been turned on to be
3954 * Unnecessary parentheses
3957 * Uppercase variables
3958 * Publicly visible private types
3959 * `#[deriving]` with raw pointers
3960 * Unsafe functions can no longer be coerced to closures.
3961 * Various obscure macros such as `log_syntax!` are now behind feature gates.
3962 * The `#[simd]` attribute is now behind a feature gate.
3963 * Visibility is no longer allowed on `extern crate` statements, and
3964 unnecessary visibility (`priv`) is no longer allowed on `use` statements.
3965 * Trailing commas are now allowed in argument lists and tuple patterns.
3966 * The `do` keyword has been removed, it is now a reserved keyword.
3967 * Default type parameters have been implemented, but are feature gated.
3968 * Borrowed variables through captures in closures are now considered soundly.
3969 * `extern mod` is now `extern crate`
3970 * The `Freeze` trait has been removed.
3971 * The `Share` trait has been added for types that can be shared among
3973 * Labels in macros are now hygienic.
3974 * Expression/statement macro invocations can be delimited with `{}` now.
3975 * Treatment of types allowed in `static mut` locations has been tweaked.
3976 * The `*` and `.` operators are now overloadable through the `Deref` and
3978 * `~Trait` and `proc` no longer have `Send` bounds by default.
3979 * Partial type hints are now supported with the `_` type marker.
3980 * An `Unsafe` type was introduced for interior mutability. It is now
3981 considered undefined to transmute from `&T` to `&mut T` without using the
3983 * The #[linkage] attribute was implemented for extern statics/functions.
3984 * The inner attribute syntax has changed from `#[foo];` to `#![foo]`.
3985 * `Pod` was renamed to `Copy`.
3988 * The `libextra` library has been removed. It has now been decomposed into
3989 component libraries with smaller and more focused nuggets of
3990 functionality. The full list of libraries can be found on the
3991 documentation index page.
3992 * std: `std::condition` has been removed. All I/O errors are now propagated
3993 through the `Result` type. In order to assist with error handling, a
3994 `try!` macro for unwrapping errors with an early return and a lint for
3995 unused results has been added. See #12039 for more information.
3996 * std: The `vec` module has been renamed to `slice`.
3997 * std: A new vector type, `Vec<T>`, has been added in preparation for DST.
3998 This will become the only growable vector in the future.
3999 * std: `std::io` now has more public-reexports. Types such as `BufferedReader`
4000 are now found at `std::io::BufferedReader` instead of
4001 `std::io::buffered::BufferedReader`.
4002 * std: `print` and `println` are no longer in the prelude, the `print!` and
4003 `println!` macros are intended to be used instead.
4004 * std: `Rc` now has a `Weak` pointer for breaking cycles, and it no longer
4005 attempts to statically prevent cycles.
4006 * std: The standard distribution is adopting the policy of pushing failure
4007 to the user rather than failing in libraries. Many functions (such as
4008 `slice::last()`) now return `Option<T>` instead of `T` + failing.
4009 * std: `fmt::Default` has been renamed to `fmt::Show`, and it now has a new
4010 deriving mode: `#[deriving(Show)]`.
4011 * std: `ToStr` is now implemented for all types implementing `Show`.
4012 * std: The formatting trait methods now take `&self` instead of `&T`
4013 * std: The `invert()` method on iterators has been renamed to `rev()`
4014 * std: `std::num` has seen a reduction in the genericity of its traits,
4015 consolidating functionality into a few core traits.
4016 * std: Backtraces are now printed on task failure if the environment
4017 variable `RUST_BACKTRACE` is present.
4018 * std: Naming conventions for iterators have been standardized. More details
4019 can be found on the wiki's style guide.
4020 * std: `eof()` has been removed from the `Reader` trait. Specific types may
4021 still implement the function.
4022 * std: Networking types are now cloneable to allow simultaneous reads/writes.
4023 * std: `assert_approx_eq!` has been removed
4024 * std: The `e` and `E` formatting specifiers for floats have been added to
4025 print them in exponential notation.
4026 * std: The `Times` trait has been removed
4027 * std: Indications of variance and opting out of builtin bounds is done
4028 through marker types in `std::kinds::marker` now
4029 * std: `hash` has been rewritten, `IterBytes` has been removed, and
4030 `#[deriving(Hash)]` is now possible.
4031 * std: `SharedChan` has been removed, `Sender` is now cloneable.
4032 * std: `Chan` and `Port` were renamed to `Sender` and `Receiver`.
4033 * std: `Chan::new` is now `channel()`.
4034 * std: A new synchronous channel type has been implemented.
4035 * std: A `select!` macro is now provided for selecting over `Receiver`s.
4036 * std: `hashmap` and `trie` have been moved to `libcollections`
4037 * std: `run` has been rolled into `io::process`
4038 * std: `assert_eq!` now uses `{}` instead of `{:?}`
4039 * std: The equality and comparison traits have seen some reorganization.
4040 * std: `rand` has moved to `librand`.
4041 * std: `to_{lower,upper}case` has been implemented for `char`.
4042 * std: Logging has been moved to `liblog`.
4043 * collections: `HashMap` has been rewritten for higher performance and less
4045 * native: The default runtime is now `libnative`. If `libgreen` is desired,
4046 it can be booted manually. The runtime guide has more information and
4048 * native: All I/O functionality except signals has been implemented.
4049 * green: Task spawning with `libgreen` has been optimized with stack caching
4050 and various trimming of code.
4051 * green: Tasks spawned by `libgreen` now have an unmapped guard page.
4052 * sync: The `extra::sync` module has been updated to modern rust (and moved
4053 to the `sync` library), tweaking and improving various interfaces while
4054 dropping redundant functionality.
4055 * sync: A new `Barrier` type has been added to the `sync` library.
4056 * sync: An efficient mutex for native and green tasks has been implemented.
4057 * serialize: The `base64` module has seen some improvement. It treats
4058 newlines better, has non-string error values, and has seen general
4060 * fourcc: A `fourcc!` macro was introduced
4061 * hexfloat: A `hexfloat!` macro was implemented for specifying floats via a
4062 hexadecimal literal.
4065 * `rustpkg` has been deprecated and removed from the main repository. Its
4066 replacement, `cargo`, is under development.
4067 * Nightly builds of rust are now available
4068 * The memory usage of rustc has been improved many times throughout this
4070 * The build process supports disabling rpath support for the rustc binary
4072 * Code generation has improved in some cases, giving more information to the
4073 LLVM optimization passes to enable more extensive optimizations.
4074 * Debuginfo compatibility with lldb on OSX has been restored.
4075 * The master branch is now gated on an android bot, making building for
4076 android much more reliable.
4077 * Output flags have been centralized into one `--emit` flag.
4078 * Crate type flags have been centralized into one `--crate-type` flag.
4079 * Codegen flags have been consolidated behind a `-C` flag.
4080 * Linking against outdated crates now has improved error messages.
4081 * Error messages with lifetimes will often suggest how to annotate the
4082 function to fix the error.
4083 * Many more types are documented in the standard library, and new guides
4085 * Many `rustdoc` improvements:
4086 * code blocks are syntax highlighted.
4087 * render standalone markdown files.
4088 * the --test flag tests all code blocks by default.
4089 * exported macros are displayed.
4090 * reexported types have their documentation inlined at the location of the
4092 * search works across crates that have been rendered to the same output
4096 Version 0.9 (2014-01-09)
4097 ==========================
4099 * ~1800 changes, numerous bugfixes
4102 * The `float` type has been removed. Use `f32` or `f64` instead.
4103 * A new facility for enabling experimental features (feature gating) has
4104 been added, using the crate-level `#[feature(foo)]` attribute.
4105 * Managed boxes (@) are now behind a feature gate
4106 (`#[feature(managed_boxes)]`) in preparation for future removal. Use the
4107 standard library's `Gc` or `Rc` types instead.
4108 * `@mut` has been removed. Use `std::cell::{Cell, RefCell}` instead.
4109 * Jumping back to the top of a loop is now done with `continue` instead of
4111 * Strings can no longer be mutated through index assignment.
4112 * Raw strings can be created via the basic `r"foo"` syntax or with matched
4113 hash delimiters, as in `r###"foo"###`.
4114 * `~fn` is now written `proc (args) -> retval { ... }` and may only be
4116 * The `&fn` type is now written `|args| -> ret` to match the literal form.
4117 * `@fn`s have been removed.
4118 * `do` only works with procs in order to make it obvious what the cost
4120 * Single-element tuple-like structs can no longer be dereferenced to
4121 obtain the inner value. A more comprehensive solution for overloading
4122 the dereference operator will be provided in the future.
4123 * The `#[link(...)]` attribute has been replaced with
4124 `#[crate_id = "name#vers"]`.
4125 * Empty `impl`s must be terminated with empty braces and may not be
4126 terminated with a semicolon.
4127 * Keywords are no longer allowed as lifetime names; the `self` lifetime
4128 no longer has any special meaning.
4129 * The old `fmt!` string formatting macro has been removed.
4130 * `printf!` and `printfln!` (old-style formatting) removed in favor of
4131 `print!` and `println!`.
4132 * `mut` works in patterns now, as in `let (mut x, y) = (1, 2);`.
4133 * The `extern mod foo (name = "bar")` syntax has been removed. Use
4134 `extern mod foo = "bar"` instead.
4135 * New reserved keywords: `alignof`, `offsetof`, `sizeof`.
4136 * Macros can have attributes.
4137 * Macros can expand to items with attributes.
4138 * Macros can expand to multiple items.
4139 * The `asm!` macro is feature-gated (`#[feature(asm)]`).
4140 * Comments may be nested.
4141 * Values automatically coerce to trait objects they implement, without
4143 * Enum discriminants are no longer an entire word but as small as needed to
4144 contain all the variants. The `repr` attribute can be used to override
4145 the discriminant size, as in `#[repr(int)]` for integer-sized, and
4146 `#[repr(C)]` to match C enums.
4147 * Non-string literals are not allowed in attributes (they never worked).
4148 * The FFI now supports variadic functions.
4149 * Octal numeric literals, as in `0o7777`.
4150 * The `concat!` syntax extension performs compile-time string concatenation.
4151 * The `#[fixed_stack_segment]` and `#[rust_stack]` attributes have been
4152 removed as Rust no longer uses segmented stacks.
4153 * Non-ascii identifiers are feature-gated (`#[feature(non_ascii_idents)]`).
4154 * Ignoring all fields of an enum variant or tuple-struct is done with `..`,
4155 not `*`; ignoring remaining fields of a struct is also done with `..`,
4156 not `_`; ignoring a slice of a vector is done with `..`, not `.._`.
4157 * `rustc` supports the "win64" calling convention via `extern "win64"`.
4158 * `rustc` supports the "system" calling convention, which defaults to the
4159 preferred convention for the target platform, "stdcall" on 32-bit Windows,
4161 * The `type_overflow` lint (default: warn) checks literals for overflow.
4162 * The `unsafe_block` lint (default: allow) checks for usage of `unsafe`.
4163 * The `attribute_usage` lint (default: warn) warns about unknown
4165 * The `unknown_features` lint (default: warn) warns about unknown
4167 * The `dead_code` lint (default: warn) checks for dead code.
4168 * Rust libraries can be linked statically to one another
4169 * `#[link_args]` is behind the `link_args` feature gate.
4170 * Native libraries are now linked with `#[link(name = "foo")]`
4171 * Native libraries can be statically linked to a rust crate
4172 (`#[link(name = "foo", kind = "static")]`).
4173 * Native OS X frameworks are now officially supported
4174 (`#[link(name = "foo", kind = "framework")]`).
4175 * The `#[thread_local]` attribute creates thread-local (not task-local)
4176 variables. Currently behind the `thread_local` feature gate.
4177 * The `return` keyword may be used in closures.
4178 * Types that can be copied via a memcpy implement the `Pod` kind.
4179 * The `cfg` attribute can now be used on struct fields and enum variants.
4182 * std: The `option` and `result` API's have been overhauled to make them
4183 simpler, more consistent, and more composable.
4184 * std: The entire `std::io` module has been replaced with one that is
4185 more comprehensive and that properly interfaces with the underlying
4186 scheduler. File, TCP, UDP, Unix sockets, pipes, and timers are all
4188 * std: `io::util` contains a number of useful implementations of
4189 `Reader` and `Writer`, including `NullReader`, `NullWriter`,
4190 `ZeroReader`, `TeeReader`.
4191 * std: The reference counted pointer type `extra::rc` moved into std.
4192 * std: The `Gc` type in the `gc` module will replace `@` (it is currently
4193 just a wrapper around it).
4194 * std: The `Either` type has been removed.
4195 * std: `fmt::Default` can be implemented for any type to provide default
4196 formatting to the `format!` macro, as in `format!("{}", myfoo)`.
4197 * std: The `rand` API continues to be tweaked.
4198 * std: The `rust_begin_unwind` function, useful for inserting breakpoints
4199 on failure in gdb, is now named `rust_fail`.
4200 * std: The `each_key` and `each_value` methods on `HashMap` have been
4201 replaced by the `keys` and `values` iterators.
4202 * std: Functions dealing with type size and alignment have moved from the
4203 `sys` module to the `mem` module.
4204 * std: The `path` module was written and API changed.
4205 * std: `str::from_utf8` has been changed to cast instead of allocate.
4206 * std: `starts_with` and `ends_with` methods added to vectors via the
4207 `ImmutableEqVector` trait, which is in the prelude.
4208 * std: Vectors can be indexed with the `get_opt` method, which returns `None`
4209 if the index is out of bounds.
4210 * std: Task failure no longer propagates between tasks, as the model was
4211 complex, expensive, and incompatible with thread-based tasks.
4212 * std: The `Any` type can be used for dynamic typing.
4213 * std: `~Any` can be passed to the `fail!` macro and retrieved via
4215 * std: Methods that produce iterators generally do not have an `_iter`
4217 * std: `cell::Cell` and `cell::RefCell` can be used to introduce mutability
4218 roots (mutable fields, etc.). Use instead of e.g. `@mut`.
4219 * std: `util::ignore` renamed to `prelude::drop`.
4220 * std: Slices have `sort` and `sort_by` methods via the `MutableVector`
4222 * std: `vec::raw` has seen a lot of cleanup and API changes.
4223 * std: The standard library no longer includes any C++ code, and very
4224 minimal C, eliminating the dependency on libstdc++.
4225 * std: Runtime scheduling and I/O functionality has been factored out into
4226 extensible interfaces and is now implemented by two different crates:
4227 libnative, for native threading and I/O; and libgreen, for green threading
4228 and I/O. This paves the way for using the standard library in more limited
4229 embedded environments.
4230 * std: The `comm` module has been rewritten to be much faster, have a
4231 simpler, more consistent API, and to work for both native and green
4233 * std: All libuv dependencies have been moved into the rustuv crate.
4234 * native: New implementations of runtime scheduling on top of OS threads.
4235 * native: New native implementations of TCP, UDP, file I/O, process spawning,
4237 * green: The green thread scheduler and message passing types are almost
4239 * extra: The `flatpipes` module had bitrotted and was removed.
4240 * extra: All crypto functions have been removed and Rust now has a policy of
4241 not reimplementing crypto in the standard library. In the future crypto
4242 will be provided by external crates with bindings to established libraries.
4243 * extra: `c_vec` has been modernized.
4244 * extra: The `sort` module has been removed. Use the `sort` method on
4248 * The `rust` and `rusti` commands have been removed, due to lack of
4250 * `rustdoc` was completely rewritten.
4251 * `rustdoc` can test code examples in documentation.
4252 * `rustpkg` can test packages with the argument, 'test'.
4253 * `rustpkg` supports arbitrary dependencies, including C libraries.
4254 * `rustc`'s support for generating debug info is improved again.
4255 * `rustc` has better error reporting for unbalanced delimiters.
4256 * `rustc`'s JIT support was removed due to bitrot.
4257 * Executables and static libraries can be built with LTO (-Z lto)
4258 * `rustc` adds a `--dep-info` flag for communicating dependencies to
4262 Version 0.8 (2013-09-26)
4263 ============================
4265 * ~2200 changes, numerous bugfixes
4268 * The `for` loop syntax has changed to work with the `Iterator` trait.
4269 * At long last, unwinding works on Windows.
4270 * Default methods are ready for use.
4271 * Many trait inheritance bugs fixed.
4272 * Owned and borrowed trait objects work more reliably.
4273 * `copy` is no longer a keyword. It has been replaced by the `Clone` trait.
4274 * rustc can omit emission of code for the `debug!` macro if it is passed
4276 * mod.rs is now "blessed". When loading `mod foo;`, rustc will now look
4277 for foo.rs, then foo/mod.rs, and will generate an error when both are
4279 * Strings no longer contain trailing nulls. The new `std::c_str` module
4280 provides new mechanisms for converting to C strings.
4281 * The type of foreign functions is now `extern "C" fn` instead of `*u8'.
4282 * The FFI has been overhauled such that foreign functions are called directly,
4283 instead of through a stack-switching wrapper.
4284 * Calling a foreign function must be done through a Rust function with the
4285 `#[fixed_stack_segment]` attribute.
4286 * The `externfn!` macro can be used to declare both a foreign function and
4287 a `#[fixed_stack_segment]` wrapper at once.
4288 * `pub` and `priv` modifiers on `extern` blocks are no longer parsed.
4289 * `unsafe` is no longer allowed on extern fns - they are all unsafe.
4290 * `priv` is disallowed everywhere except for struct fields and enum variants.
4291 * `&T` (besides `&'static T`) is no longer allowed in `@T`.
4292 * `ref` bindings in irrefutable patterns work correctly now.
4293 * `char` is now prevented from containing invalid code points.
4294 * Casting to `bool` is no longer allowed.
4295 * `\0` is now accepted as an escape in chars and strings.
4296 * `yield` is a reserved keyword.
4297 * `typeof` is a reserved keyword.
4298 * Crates may be imported by URL with `extern mod foo = "url";`.
4299 * Explicit enum discriminants may be given as uints as in `enum E { V = 0u }`
4300 * Static vectors can be initialized with repeating elements,
4301 e.g. `static foo: [u8, .. 100]: [0, .. 100];`.
4302 * Static structs can be initialized with functional record update,
4303 e.g. `static foo: Foo = Foo { a: 5, .. bar };`.
4304 * `cfg!` can be used to conditionally execute code based on the crate
4305 configuration, similarly to `#[cfg(...)]`.
4306 * The `unnecessary_qualification` lint detects unneeded module
4307 prefixes (default: allow).
4308 * Arithmetic operations have been implemented on the SIMD types in
4309 `std::unstable::simd`.
4310 * Exchange allocation headers were removed, reducing memory usage.
4311 * `format!` implements a completely new, extensible, and higher-performance
4312 string formatting system. It will replace `fmt!`.
4313 * `print!` and `println!` write formatted strings (using the `format!`
4314 extension) to stdout.
4315 * `write!` and `writeln!` write formatted strings (using the `format!`
4316 extension) to the new Writers in `std::rt::io`.
4317 * The library section in which a function or static is placed may
4318 be specified with `#[link_section = "..."]`.
4319 * The `proto!` syntax extension for defining bounded message protocols
4321 * `macro_rules!` is hygienic for `let` declarations.
4322 * The `#[export_name]` attribute specifies the name of a symbol.
4323 * `unreachable!` can be used to indicate unreachable code, and fails
4327 * std: Transitioned to the new runtime, written in Rust.
4328 * std: Added an experimental I/O library, `rt::io`, based on the new
4330 * std: A new generic `range` function was added to the prelude, replacing
4331 `uint::range` and friends.
4332 * std: `range_rev` no longer exists. Since range is an iterator it can be
4333 reversed with `range(lo, hi).invert()`.
4334 * std: The `chain` method on option renamed to `and_then`; `unwrap_or_default`
4335 renamed to `unwrap_or`.
4336 * std: The `iterator` module was renamed to `iter`.
4337 * std: Integral types now support the `checked_add`, `checked_sub`, and
4338 `checked_mul` operations for detecting overflow.
4339 * std: Many methods in `str`, `vec`, `option, `result` were renamed for
4341 * std: Methods are standardizing on conventions for casting methods:
4342 `to_foo` for copying, `into_foo` for moving, `as_foo` for temporary
4344 * std: The `CString` type in `c_str` provides new ways to convert to and
4346 * std: `DoubleEndedIterator` can yield elements in two directions.
4347 * std: The `mut_split` method on vectors partitions an `&mut [T]` into
4349 * std: `str::from_bytes` renamed to `str::from_utf8`.
4350 * std: `pop_opt` and `shift_opt` methods added to vectors.
4351 * std: The task-local data interface no longer uses @, and keys are
4352 no longer function pointers.
4353 * std: The `swap_unwrap` method of `Option` renamed to `take_unwrap`.
4354 * std: Added `SharedPort` to `comm`.
4355 * std: `Eq` has a default method for `ne`; only `eq` is required
4357 * std: `Ord` has default methods for `le`, `gt` and `ge`; only `lt`
4358 is required in implementations.
4359 * std: `is_utf8` performance is improved, impacting many string functions.
4360 * std: `os::MemoryMap` provides cross-platform mmap.
4361 * std: `ptr::offset` is now unsafe, but also more optimized. Offsets that
4362 are not 'in-bounds' are considered undefined.
4363 * std: Many freestanding functions in `vec` removed in favor of methods.
4364 * std: Many freestanding functions on scalar types removed in favor of
4366 * std: Many options to task builders were removed since they don't make
4367 sense in the new scheduler design.
4368 * std: More containers implement `FromIterator` so can be created by the
4370 * std: More complete atomic types in `unstable::atomics`.
4371 * std: `comm::PortSet` removed.
4372 * std: Mutating methods in the `Set` and `Map` traits have been moved into
4373 the `MutableSet` and `MutableMap` traits. `Container::is_empty`,
4374 `Map::contains_key`, `MutableMap::insert`, and `MutableMap::remove` have
4375 default implementations.
4376 * std: Various `from_str` functions were removed in favor of a generic
4377 `from_str` which is available in the prelude.
4378 * std: `util::unreachable` removed in favor of the `unreachable!` macro.
4379 * extra: `dlist`, the doubly-linked list was modernized.
4380 * extra: Added a `hex` module with `ToHex` and `FromHex` traits.
4381 * extra: Added `glob` module, replacing `std::os::glob`.
4382 * extra: `rope` was removed.
4383 * extra: `deque` was renamed to `ringbuf`. `RingBuf` implements `Deque`.
4384 * extra: `net`, and `timer` were removed. The experimental replacements
4385 are `std::rt::io::net` and `std::rt::io::timer`.
4386 * extra: Iterators implemented for `SmallIntMap`.
4387 * extra: Iterators implemented for `Bitv` and `BitvSet`.
4388 * extra: `SmallIntSet` removed. Use `BitvSet`.
4389 * extra: Performance of JSON parsing greatly improved.
4390 * extra: `semver` updated to SemVer 2.0.0.
4391 * extra: `term` handles more terminals correctly.
4392 * extra: `dbg` module removed.
4393 * extra: `par` module removed.
4394 * extra: `future` was cleaned up, with some method renames.
4395 * extra: Most free functions in `getopts` were converted to methods.
4398 * rustc's debug info generation (`-Z debug-info`) is greatly improved.
4399 * rustc accepts `--target-cpu` to compile to a specific CPU architecture,
4400 similarly to gcc's `--march` flag.
4401 * rustc's performance compiling small crates is much better.
4402 * rustpkg has received many improvements.
4403 * rustpkg supports git tags as package IDs.
4404 * rustpkg builds into target-specific directories so it can be used for
4406 * The number of concurrent test tasks is controlled by the environment
4407 variable RUST_TEST_TASKS.
4408 * The test harness can now report metrics for benchmarks.
4409 * All tools have man pages.
4410 * Programs compiled with `--test` now support the `-h` and `--help` flags.
4411 * The runtime uses jemalloc for allocations.
4412 * Segmented stacks are temporarily disabled as part of the transition to
4413 the new runtime. Stack overflows are possible!
4414 * A new documentation backend, rustdoc_ng, is available for use. It is
4415 still invoked through the normal `rustdoc` command.
4418 Version 0.7 (2013-07-03)
4419 =======================
4421 * ~2000 changes, numerous bugfixes
4424 * `impl`s no longer accept a visibility qualifier. Put them on methods
4426 * The borrow checker has been rewritten with flow-sensitivity, fixing
4427 many bugs and inconveniences.
4428 * The `self` parameter no longer implicitly means `&'self self`,
4429 and can be explicitly marked with a lifetime.
4430 * Overloadable compound operators (`+=`, etc.) have been temporarily
4431 removed due to bugs.
4432 * The `for` loop protocol now requires `for`-iterators to return `bool`
4433 so they compose better.
4434 * The `Durable` trait is replaced with the `'static` bounds.
4435 * Trait default methods work more often.
4436 * Structs with the `#[packed]` attribute have byte alignment and
4437 no padding between fields.
4438 * Type parameters bound by `Copy` must now be copied explicitly with
4440 * It is now illegal to move out of a dereferenced unsafe pointer.
4441 * `Option<~T>` is now represented as a nullable pointer.
4442 * `@mut` does dynamic borrow checks correctly.
4443 * The `main` function is only detected at the topmost level of the crate.
4444 The `#[main]` attribute is still valid anywhere.
4445 * Struct fields may no longer be mutable. Use inherited mutability.
4446 * The `#[no_send]` attribute makes a type that would otherwise be
4448 * The `#[no_freeze]` attribute makes a type that would otherwise be
4450 * Unbounded recursion will abort the process after reaching the limit
4451 specified by the `RUST_MAX_STACK` environment variable (default: 1GB).
4452 * The `vecs_implicitly_copyable` lint mode has been removed. Vectors
4453 are never implicitly copyable.
4454 * `#[static_assert]` makes compile-time assertions about static bools.
4455 * At long last, 'argument modes' no longer exist.
4456 * The rarely used `use mod` statement no longer exists.
4459 * `fail!` and `assert!` accept `~str`, `&'static str` or `fmt!`-style
4461 * `Encodable`, `Decodable`, `Ord`, `TotalOrd`, `TotalEq`, `DeepClone`,
4462 `Rand`, `Zero` and `ToStr` can all be automatically derived with
4464 * The `bytes!` macro returns a vector of bytes for string, u8, char,
4465 and unsuffixed integer literals.
4468 * The `core` crate was renamed to `std`.
4469 * The `std` crate was renamed to `extra`.
4470 * More and improved documentation.
4471 * std: `iterator` module for external iterator objects.
4472 * Many old-style (internal, higher-order function) iterators replaced by
4473 implementations of `Iterator`.
4474 * std: Many old internal vector and string iterators,
4475 incl. `any`, `all`. removed.
4476 * std: The `finalize` method of `Drop` renamed to `drop`.
4477 * std: The `drop` method now takes `&mut self` instead of `&self`.
4478 * std: The prelude no longer reexports any modules, only types and traits.
4479 * std: Prelude additions: `print`, `println`, `FromStr`, `ApproxEq`, `Equiv`,
4480 `Iterator`, `IteratorUtil`, many numeric traits, many tuple traits.
4481 * std: New numeric traits: `Fractional`, `Real`, `RealExt`, `Integer`, `Ratio`,
4482 `Algebraic`, `Trigonometric`, `Exponential`, `Primitive`.
4483 * std: Tuple traits and accessors defined for up to 12-tuples, e.g.
4484 `(0, 1, 2).n2()` or `(0, 1, 2).n2_ref()`.
4485 * std: Many types implement `Clone`.
4486 * std: `path` type renamed to `Path`.
4487 * std: `mut` module and `Mut` type removed.
4488 * std: Many standalone functions removed in favor of methods and iterators
4489 in `vec`, `str`. In the future methods will also work as functions.
4490 * std: `reinterpret_cast` removed. Use `transmute`.
4491 * std: ascii string handling in `std::ascii`.
4492 * std: `Rand` is implemented for ~/@.
4493 * std: `run` module for spawning processes overhauled.
4494 * std: Various atomic types added to `unstable::atomic`.
4495 * std: Various types implement `Zero`.
4496 * std: `LinearMap` and `LinearSet` renamed to `HashMap` and `HashSet`.
4497 * std: Borrowed pointer functions moved from `ptr` to `borrow`.
4498 * std: Added `os::mkdir_recursive`.
4499 * std: Added `os::glob` function performs filesystems globs.
4500 * std: `FuzzyEq` renamed to `ApproxEq`.
4501 * std: `Map` now defines `pop` and `swap` methods.
4502 * std: `Cell` constructors converted to static methods.
4503 * extra: `rc` module adds the reference counted pointers, `Rc` and `RcMut`.
4504 * extra: `flate` module moved from `std` to `extra`.
4505 * extra: `fileinput` module for iterating over a series of files.
4506 * extra: `Complex` number type and `complex` module.
4507 * extra: `Rational` number type and `rational` module.
4508 * extra: `BigInt`, `BigUint` implement numeric and comparison traits.
4509 * extra: `term` uses terminfo now, is more correct.
4510 * extra: `arc` functions converted to methods.
4511 * extra: Implementation of fixed output size variations of SHA-2.
4514 * `unused_variable` lint mode for unused variables (default: warn).
4515 * `unused_unsafe` lint mode for detecting unnecessary `unsafe` blocks
4517 * `unused_mut` lint mode for identifying unused `mut` qualifiers
4519 * `dead_assignment` lint mode for unread variables (default: warn).
4520 * `unnecessary_allocation` lint mode detects some heap allocations that are
4521 immediately borrowed so could be written without allocating (default: warn).
4522 * `missing_doc` lint mode (default: allow).
4523 * `unreachable_code` lint mode (default: warn).
4524 * The `rusti` command has been rewritten and a number of bugs addressed.
4525 * rustc outputs in color on more terminals.
4526 * rustc accepts a `--link-args` flag to pass arguments to the linker.
4527 * rustc accepts a `-Z print-link-args` flag for debugging linkage.
4528 * Compiling with `-g` will make the binary record information about
4529 dynamic borrowcheck failures for debugging.
4530 * rustdoc has a nicer stylesheet.
4531 * Various improvements to rustdoc.
4532 * Improvements to rustpkg (see the detailed release notes).
4535 Version 0.6 (2013-04-03)
4536 ========================
4538 * ~2100 changes, numerous bugfixes
4541 * The self type parameter in traits is now spelled `Self`
4542 * The `self` parameter in trait and impl methods must now be explicitly
4543 named (for example: `fn f(&self) { }`). Implicit self is deprecated.
4544 * Static methods no longer require the `static` keyword and instead
4545 are distinguished by the lack of a `self` parameter
4546 * Replaced the `Durable` trait with the `'static` lifetime
4547 * The old closure type syntax with the trailing sigil has been
4548 removed in favor of the more consistent leading sigil
4549 * `super` is a keyword, and may be prefixed to paths
4550 * Trait bounds are separated with `+` instead of whitespace
4551 * Traits are implemented with `impl Trait for Type`
4552 instead of `impl Type: Trait`
4553 * Lifetime syntax is now `&'l foo` instead of `&l/foo`
4554 * The `export` keyword has finally been removed
4555 * The `move` keyword has been removed (see "Semantic changes")
4556 * The interior mutability qualifier on vectors, `[mut T]`, has been
4557 removed. Use `&mut [T]`, etc.
4558 * `mut` is no longer valid in `~mut T`. Use inherited mutability
4559 * `fail` is no longer a keyword. Use `fail!()`
4560 * `assert` is no longer a keyword. Use `assert!()`
4561 * `log` is no longer a keyword. use `debug!`, etc.
4562 * 1-tuples may be represented as `(T,)`
4563 * Struct fields may no longer be `mut`. Use inherited mutability,
4564 `@mut T`, `core::mut` or `core::cell`
4565 * `extern mod { ... }` is no longer valid syntax for foreign
4566 function modules. Use extern blocks: `extern { ... }`
4567 * Newtype enums removed. Use tuple-structs.
4568 * Trait implementations no longer support visibility modifiers
4569 * Pattern matching over vectors improved and expanded
4570 * `const` renamed to `static` to correspond to lifetime name,
4571 and make room for future `static mut` unsafe mutable globals.
4572 * Replaced `#[deriving_eq]` with `#[deriving(Eq)]`, etc.
4573 * `Clone` implementations can be automatically generated with
4574 `#[deriving(Clone)]`
4575 * Casts to traits must use a pointer sigil, e.g. `@foo as @Bar`
4576 instead of `foo as Bar`.
4577 * Fixed length vector types are now written as `[int, .. 3]`
4578 instead of `[int * 3]`.
4579 * Fixed length vector types can express the length as a constant
4580 expression. (ex: `[int, .. GL_BUFFER_SIZE - 2]`)
4583 * Types with owned pointers or custom destructors move by default,
4584 eliminating the `move` keyword
4585 * All foreign functions are considered unsafe
4586 * &mut is now unaliasable
4587 * Writes to borrowed @mut pointers are prevented dynamically
4589 * The name of the main function can be customized using #[main]
4590 * The default type of an inferred closure is &fn instead of @fn
4591 * `use` statements may no longer be "chained" - they cannot import
4592 identifiers imported by previous `use` statements
4593 * `use` statements are crate relative, importing from the "top"
4594 of the crate by default. Paths may be prefixed with `super::`
4595 or `self::` to change the search behavior.
4596 * Method visibility is inherited from the implementation declaration
4597 * Structural records have been removed
4598 * Many more types can be used in static items, including enums
4599 'static-lifetime pointers and vectors
4600 * Pattern matching over vectors improved and expanded
4601 * Typechecking of closure types has been overhauled to
4602 improve inference and eliminate unsoundness
4603 * Macros leave scope at the end of modules, unless that module is
4604 tagged with #[macro_escape]
4607 * Added big integers to `std::bigint`
4608 * Removed `core::oldcomm` module
4609 * Added pipe-based `core::comm` module
4610 * Numeric traits have been reorganized under `core::num`
4611 * `vec::slice` finally returns a slice
4612 * `debug!` and friends don't require a format string, e.g. `debug!(Foo)`
4613 * Containers reorganized around traits in `core::container`
4614 * `core::dvec` removed, `~[T]` is a drop-in replacement
4615 * `core::send_map` renamed to `core::hashmap`
4616 * `std::map` removed; replaced with `core::hashmap`
4617 * `std::treemap` reimplemented as an owned balanced tree
4618 * `std::deque` and `std::smallintmap` reimplemented as owned containers
4619 * `core::trie` added as a fast ordered map for integer keys
4620 * Set types added to `core::hashmap`, `core::trie` and `std::treemap`
4621 * `Ord` split into `Ord` and `TotalOrd`. `Ord` is still used to
4622 overload the comparison operators, whereas `TotalOrd` is used
4623 by certain container types
4626 * Replaced the 'cargo' package manager with 'rustpkg'
4627 * Added all-purpose 'rust' tool
4628 * `rustc --test` now supports benchmarks with the `#[bench]` attribute
4629 * rustc now *attempts* to offer spelling suggestions
4630 * Improved support for ARM and Android
4631 * Preliminary MIPS backend
4632 * Improved foreign function ABI implementation for x86, x86_64
4633 * Various memory usage improvements
4634 * Rust code may be embedded in foreign code under limited circumstances
4635 * Inline assembler supported by new asm!() syntax extension.
4638 Version 0.5 (2012-12-21)
4639 ===========================
4641 * ~900 changes, numerous bugfixes
4644 * Removed `<-` move operator
4645 * Completed the transition from the `#fmt` extension syntax to `fmt!`
4646 * Removed old fixed length vector syntax - `[T]/N`
4647 * New token-based quasi-quoters, `quote_tokens!`, `quote_expr!`, etc.
4648 * Macros may now expand to items and statements
4649 * `a.b()` is always parsed as a method call, never as a field projection
4650 * `Eq` and `IterBytes` implementations can be automatically generated
4651 with `#[deriving_eq]` and `#[deriving_iter_bytes]` respectively
4652 * Removed the special crate language for `.rc` files
4653 * Function arguments may consist of any irrefutable pattern
4656 * `&` and `~` pointers may point to objects
4657 * Tuple structs - `struct Foo(Bar, Baz)`. Will replace newtype enums.
4658 * Enum variants may be structs
4659 * Destructors can be added to all nominal types with the Drop trait
4660 * Structs and nullary enum variants may be constants
4661 * Values that cannot be implicitly copied are now automatically moved
4662 without writing `move` explicitly
4663 * `&T` may now be coerced to `*T`
4664 * Coercions happen in `let` statements as well as function calls
4665 * `use` statements now take crate-relative paths
4666 * The module and type namespaces have been merged so that static
4667 method names can be resolved under the trait in which they are
4670 * Improved support for language features
4671 * Trait inheritance works in many scenarios
4672 * More support for explicit self arguments in methods - `self`, `&self`
4673 `@self`, and `~self` all generally work as expected
4674 * Static methods work in more situations
4675 * Experimental: Traits may declare default methods for the implementations
4679 * New condition handling system in `core::condition`
4680 * Timsort added to `std::sort`
4681 * New priority queue, `std::priority_queue`
4682 * Pipes for serializable types, `std::flatpipes'
4683 * Serialization overhauled to be trait-based
4684 * Expanded `getopts` definitions
4685 * Moved futures to `std`
4686 * More functions are pure now
4687 * `core::comm` renamed to `oldcomm`. Still deprecated
4688 * `rustdoc` and `cargo` are libraries now
4691 * Added a preliminary REPL, `rusti`
4692 * License changed from MIT to dual MIT/APL2
4695 Version 0.4 (2012-10-15)
4696 ==========================
4698 * ~2000 changes, numerous bugfixes
4701 * All keywords are now strict and may not be used as identifiers anywhere
4702 * Keyword removal: 'again', 'import', 'check', 'new', 'owned', 'send',
4703 'of', 'with', 'to', 'class'.
4704 * Classes are replaced with simpler structs
4705 * Explicit method self types
4706 * `ret` became `return` and `alt` became `match`
4707 * `import` is now `use`; `use is now `extern mod`
4708 * `extern mod { ... }` is now `extern { ... }`
4709 * `use mod` is the recommended way to import modules
4710 * `pub` and `priv` replace deprecated export lists
4711 * The syntax of `match` pattern arms now uses fat arrow (=>)
4712 * `main` no longer accepts an args vector; use `os::args` instead
4715 * Trait implementations are now coherent, ala Haskell typeclasses
4716 * Trait methods may be static
4717 * Argument modes are deprecated
4718 * Borrowed pointers are much more mature and recommended for use
4719 * Strings and vectors in the static region are stored in constant memory
4720 * Typestate was removed
4721 * Resolution rewritten to be more reliable
4722 * Support for 'dual-mode' data structures (freezing and thawing)
4725 * Most binary operators can now be overloaded via the traits in
4727 * `std::net::url` for representing URLs
4728 * Sendable hash maps in `core::send_map`
4729 * `core::task' gained a (currently unsafe) task-local storage API
4732 * An efficient new intertask communication primitive called the pipe,
4733 along with a number of higher-level channel types, in `core::pipes`
4734 * `std::arc`, an atomically reference counted, immutable, shared memory
4736 * `std::sync`, various exotic synchronization tools based on arcs and pipes
4737 * Futures are now based on pipes and sendable
4738 * More robust linked task failure
4739 * Improved task builder API
4742 * Improved error reporting
4743 * Preliminary JIT support
4744 * Preliminary work on precise GC
4745 * Extensive architectural improvements to rustc
4746 * Begun a transition away from buggy C++-based reflection (shape) code to
4747 Rust-based (visitor) code
4748 * All hash functions and tables converted to secure, randomized SipHash
4751 Version 0.3 (2012-07-12)
4752 ========================
4754 * ~1900 changes, numerous bugfixes
4756 * New coding conveniences
4757 * Integer-literal suffix inference
4758 * Per-item control over warnings, errors
4759 * #[cfg(windows)] and #[cfg(unix)] attributes
4760 * Documentation comments
4761 * More compact closure syntax
4762 * 'do' expressions for treating higher-order functions as
4764 * *-patterns (wildcard extended to all constructor fields)
4767 * Name resolution pass and exhaustiveness checker rewritten
4768 * Region pointers and borrow checking supersede alias
4770 * Init-ness checking is now provided by a region-based liveness
4771 pass instead of the typestate pass; same for last-use analysis
4772 * Extensive work on region pointers
4774 * Experimental new language features
4775 * Slices and fixed-size, interior-allocated vectors
4776 * #!-comments for lang versioning, shell execution
4777 * Destructors and iface implementation for classes;
4778 type-parameterized classes and class methods
4779 * 'const' type kind for types that can be used to implement
4780 shared-memory concurrency patterns
4784 * Removal of various obsolete features
4785 * Keywords: 'be', 'prove', 'syntax', 'note', 'mutable', 'bind',
4786 'crust', 'native' (now 'extern'), 'cont' (now 'again')
4788 * Constructs: do-while loops ('do' repurposed), fn binding,
4789 resources (replaced by destructors)
4791 * Compiler reorganization
4792 * Syntax-layer of compiler split into separate crate
4793 * Clang (from LLVM project) integrated into build
4794 * Typechecker split into sub-modules
4797 * New time functions
4798 * Extension methods for many built-in types
4799 * Arc: atomic-refcount read-only / exclusive-use shared cells
4800 * Par: parallel map and search routines
4801 * Extensive work on libuv interface
4802 * Much vector code moved to libraries
4803 * Syntax extensions: #line, #col, #file, #mod, #stringify,
4804 #include, #include_str, #include_bin
4807 * Cargo automatically resolves dependencies
4810 Version 0.2 (2012-03-29)
4811 =========================
4813 * >1500 changes, numerous bugfixes
4815 * New docs and doc tooling
4817 * New port: FreeBSD x86_64
4819 * Compilation model enhancements
4820 * Generics now specialized, multiply instantiated
4821 * Functions now inlined across separate crates
4823 * Scheduling, stack and threading fixes
4824 * Noticeably improved message-passing performance
4825 * Explicit schedulers
4829 * Experimental new language features
4830 * Operator overloading
4834 * Various language extensions
4835 * C-callback function types: 'crust fn ...'
4836 * Infinite-loop construct: 'loop { ... }'
4837 * Shorten 'mutable' to 'mut'
4838 * Required mutable-local qualifier: 'let mut ...'
4839 * Basic glob-exporting: 'export foo::*;'
4840 * Alt now exhaustive, 'alt check' for runtime-checked
4841 * Block-function form of 'for' loop, with 'break' and 'ret'.
4844 * AST quasi-quote syntax extension
4845 * Revived libuv interface
4846 * New modules: core::{future, iter}, std::arena
4847 * Merged per-platform std::{os*, fs*} to core::{libc, os}
4848 * Extensive cleanup, regularization in libstd, libcore
4851 Version 0.1 (2012-01-20)
4852 ===============================
4854 * Most language features work, including:
4855 * Unique pointers, unique closures, move semantics
4856 * Interface-constrained generics
4857 * Static interface dispatch
4859 * Multithread task scheduling
4860 * Typestate predicates
4861 * Failure unwinding, destructors
4862 * Pattern matching and destructuring assignment
4863 * Lightweight block-lambda syntax
4864 * Preliminary macro-by-example
4866 * Compiler works with the following configurations:
4867 * Linux: x86 and x86_64 hosts and targets
4868 * MacOS: x86 and x86_64 hosts and targets
4869 * Windows: x86 hosts and targets
4871 * Cross compilation / multi-target configuration supported.
4873 * Preliminary API-documentation and package-management tools included.
4877 * Documentation is incomplete.
4879 * Performance is below intended target.
4881 * Standard library APIs are subject to extensive change, reorganization.
4883 * Language-level versioning is not yet operational - future code will