1 Version 1.15.0 (2017-02-02)
2 ===========================
7 * Basic procedural macros allowing custom `#[derive]`, aka "macros 1.1", are
8 stable. This allows popular code-generating crates like Serde and Diesel to
9 work ergonomically. [RFC 1681].
10 * [Tuple structs may be empty. Unary and empty tuple structs may be instantiated
11 with curly braces][36868]. Part of [RFC 1506].
12 * [A number of minor changes to name resolution have been activated][37127].
13 They add up to more consistent semantics, allowing for future evolution of
14 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
15 details of what is different. The breaking changes here have been transitioned
16 through the [`legacy_imports`] lint since 1.14, with no known regressions.
17 * [In `macro_rules`, `path` fragments can now be parsed as type parameter
19 * [`?Sized` can be used in `where` clauses][37791]
20 * [There is now a limit on the size of monomorphized types and it can be
21 modified with the `#![type_size_limit]` crate attribute, similarly to
22 the `#![recursion_limit]` attribute][37789]
27 * [On Windows, the compiler will apply dllimport attributes when linking to
28 extern functions][37973]. Additional attributes and flags can control which
29 library kind is linked and its name. [RFC 1717].
30 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
31 * [The `--test` flag works with procedural macro crates][38107]
32 * [Fix `extern "aapcs" fn` ABI][37814]
33 * [The `-C no-stack-check` flag is deprecated][37636]. It does nothing.
34 * [The `format!` expander recognizes incorrect `printf` and shell-style
35 formatting directives and suggests the correct format][37613].
36 * [Only report one error for all unused imports in an import list][37456]
41 * [Avoid unnecessary `mk_ty` calls in `Ty::super_fold_with`][37705]
42 * [Avoid more unnecessary `mk_ty` calls in `Ty::super_fold_with`][37979]
43 * [Don't clone in `UnificationTable::probe`][37848]
44 * [Remove `scope_auxiliary` to cut RSS by 10%][37764]
45 * [Use small vectors in type walker][37760]
46 * [Macro expansion performance was improved][37701]
47 * [Change `HirVec<P<T>>` to `HirVec<T>` in `hir::Expr`][37642]
48 * [Replace FNV with a faster hash function][37229]
53 * [`std::iter::Iterator::min_by`]
54 * [`std::iter::Iterator::max_by`]
55 * [`std::os::*::fs::FileExt`]
56 * [`std::sync::atomic::Atomic*::get_mut`]
57 * [`std::sync::atomic::Atomic*::into_inner`]
58 * [`std::vec::IntoIter::as_slice`]
59 * [`std::vec::IntoIter::as_mut_slice`]
60 * [`std::sync::mpsc::Receiver::try_iter`]
61 * [`std::os::unix::process::CommandExt::before_exec`]
62 * [`std::rc::Rc::strong_count`]
63 * [`std::rc::Rc::weak_count`]
64 * [`std::sync::Arc::strong_count`]
65 * [`std::sync::Arc::weak_count`]
66 * [`std::char::encode_utf8`]
67 * [`std::char::encode_utf16`]
68 * [`std::cell::Ref::clone`]
69 * [`std::io::Take::into_inner`]
74 * [The standard sorting algorithm has been rewritten for dramatic performance
75 improvements][38192]. It is a hybrid merge sort, drawing influences from
76 Timsort. Previously it was a naive merge sort.
77 * [`Iterator::nth` no longer has a `Sized` bound][38134]
78 * [`Extend<&T>` is specialized for `Vec` where `T: Copy`][38182] to improve
80 * [`chars().count()` is much faster][37888] and so are [`chars().last()`
81 and `char_indices().last()`][37882]
82 * [Fix ARM Objective-C ABI in `std::env::args`][38146]
83 * [Chinese characters display correctly in `fmt::Debug`][37855]
84 * [Derive `Default` for `Duration`][37699]
85 * [Support creation of anonymous pipes on WinXP/2k][37677]
86 * [`mpsc::RecvTimeoutError` implements `Error`][37527]
87 * [Don't pass overlapped handles to processes][38835]
92 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
93 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
94 should instead check the variable at runtime with `std::env`. That the value
95 was set at build time was a bug, and incorrect when cross-compiling. This
96 change is known to cause breakage.
97 * [Add `--all` flag to `cargo test`][cargo/3221]
98 * [Compile statically against the MSVC CRT][cargo/3363]
99 * [Mix feature flags into fingerprint/metadata shorthash][cargo/3102]
100 * [Link OpenSSL statically on OSX][cargo/3311]
101 * [Apply new fingerprinting to build dir outputs][cargo/3310]
102 * [Test for bad path overrides with summaries][cargo/3336]
103 * [Require `cargo install --vers` to take a semver version][cargo/3338]
104 * [Fix retrying crate downloads for network errors][cargo/3348]
105 * [Implement string lookup for `build.rustflags` config key][cargo/3356]
106 * [Emit more info on --message-format=json][cargo/3319]
107 * [Assume `build.rs` in the same directory as `Cargo.toml` is a build script][cargo/3361]
108 * [Don't ignore errors in workspace manifest][cargo/3409]
109 * [Fix `--message-format JSON` when rustc emits non-JSON warnings][cargo/3410]
114 * [Test runners (binaries built with `--test`) now support a `--list` argument
115 that lists the tests it contains][38185]
116 * [Test runners now support a `--exact` argument that makes the test filter
117 match exactly, instead of matching only a substring of the test name][38181]
118 * [rustdoc supports a `--playground-url` flag][37763]
119 * [rustdoc provides more details about `#[should_panic]` errors][37749]
124 * [The Rust build system is now written in Rust][37817]. The Makefiles may
125 continue to be used in this release by passing `--disable-rustbuild` to the
126 configure script, but they will be deleted soon. Note that the new build
127 system uses a different on-disk layout that will likely affect any scripts
129 * [Rust supports i686-unknown-openbsd][38086]. Tier 3 support. No testing or
131 * [Rust supports the MSP430][37627]. Tier 3 support. No testing or releases.
132 * [Rust supports the ARMv5TE architecture][37615]. Tier 3 support. No testing or
138 * [A number of minor changes to name resolution have been activated][37127].
139 They add up to more consistent semantics, allowing for future evolution of
140 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
141 details of what is different. The breaking changes here have been transitioned
142 through the [`legacy_imports`] lint since 1.14, with no known regressions.
143 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
144 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
145 should instead check the variable at runtime with `std::env`. That the value
146 was set at build time was a bug, and incorrect when cross-compiling. This
147 change is known to cause breakage.
148 * [Higher-ranked lifetimes are no longer allowed to appear _only_ in associated
149 types][33685]. The [`hr_lifetime_in_assoc_type` lint] has been a warning since
150 1.10 and is now an error by default. It will become a hard error in the near
152 * [The semantics relating modules to file system directories are changing in
153 minor ways][37602]. This is captured in the new `legacy_directory_ownership`
154 lint, which is a warning in this release, and will become a hard error in the
156 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
157 * [Once `Peekable` peeks a `None` it will return that `None` without re-querying
158 the underlying iterator][37834]
160 ["changes"]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md#changes-to-name-resolution-rules
161 [33685]: https://github.com/rust-lang/rust/issues/33685
162 [36868]: https://github.com/rust-lang/rust/pull/36868
163 [37127]: https://github.com/rust-lang/rust/pull/37127
164 [37229]: https://github.com/rust-lang/rust/pull/37229
165 [37456]: https://github.com/rust-lang/rust/pull/37456
166 [37527]: https://github.com/rust-lang/rust/pull/37527
167 [37602]: https://github.com/rust-lang/rust/pull/37602
168 [37613]: https://github.com/rust-lang/rust/pull/37613
169 [37615]: https://github.com/rust-lang/rust/pull/37615
170 [37636]: https://github.com/rust-lang/rust/pull/37636
171 [37627]: https://github.com/rust-lang/rust/pull/37627
172 [37642]: https://github.com/rust-lang/rust/pull/37642
173 [37677]: https://github.com/rust-lang/rust/pull/37677
174 [37699]: https://github.com/rust-lang/rust/pull/37699
175 [37701]: https://github.com/rust-lang/rust/pull/37701
176 [37705]: https://github.com/rust-lang/rust/pull/37705
177 [37749]: https://github.com/rust-lang/rust/pull/37749
178 [37760]: https://github.com/rust-lang/rust/pull/37760
179 [37763]: https://github.com/rust-lang/rust/pull/37763
180 [37764]: https://github.com/rust-lang/rust/pull/37764
181 [37789]: https://github.com/rust-lang/rust/pull/37789
182 [37791]: https://github.com/rust-lang/rust/pull/37791
183 [37814]: https://github.com/rust-lang/rust/pull/37814
184 [37817]: https://github.com/rust-lang/rust/pull/37817
185 [37834]: https://github.com/rust-lang/rust/pull/37834
186 [37848]: https://github.com/rust-lang/rust/pull/37848
187 [37855]: https://github.com/rust-lang/rust/pull/37855
188 [37882]: https://github.com/rust-lang/rust/pull/37882
189 [37888]: https://github.com/rust-lang/rust/pull/37888
190 [37973]: https://github.com/rust-lang/rust/pull/37973
191 [37979]: https://github.com/rust-lang/rust/pull/37979
192 [38086]: https://github.com/rust-lang/rust/pull/38086
193 [38107]: https://github.com/rust-lang/rust/pull/38107
194 [38117]: https://github.com/rust-lang/rust/pull/38117
195 [38134]: https://github.com/rust-lang/rust/pull/38134
196 [38146]: https://github.com/rust-lang/rust/pull/38146
197 [38181]: https://github.com/rust-lang/rust/pull/38181
198 [38182]: https://github.com/rust-lang/rust/pull/38182
199 [38185]: https://github.com/rust-lang/rust/pull/38185
200 [38192]: https://github.com/rust-lang/rust/pull/38192
201 [38279]: https://github.com/rust-lang/rust/pull/38279
202 [38835]: https://github.com/rust-lang/rust/pull/38835
203 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
204 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
205 [RFC 1560]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md
206 [RFC 1681]: https://github.com/rust-lang/rfcs/blob/master/text/1681-macros-1.1.md
207 [RFC 1717]: https://github.com/rust-lang/rfcs/blob/master/text/1717-dllimport.md
208 [`hr_lifetime_in_assoc_type` lint]: https://github.com/rust-lang/rust/issues/33685
209 [`legacy_imports`]: https://github.com/rust-lang/rust/pull/38271
210 [cargo/3102]: https://github.com/rust-lang/cargo/pull/3102
211 [cargo/3221]: https://github.com/rust-lang/cargo/pull/3221
212 [cargo/3310]: https://github.com/rust-lang/cargo/pull/3310
213 [cargo/3311]: https://github.com/rust-lang/cargo/pull/3311
214 [cargo/3319]: https://github.com/rust-lang/cargo/pull/3319
215 [cargo/3336]: https://github.com/rust-lang/cargo/pull/3336
216 [cargo/3338]: https://github.com/rust-lang/cargo/pull/3338
217 [cargo/3348]: https://github.com/rust-lang/cargo/pull/3348
218 [cargo/3356]: https://github.com/rust-lang/cargo/pull/3356
219 [cargo/3361]: https://github.com/rust-lang/cargo/pull/3361
220 [cargo/3363]: https://github.com/rust-lang/cargo/pull/3363
221 [cargo/3368]: https://github.com/rust-lang/cargo/issues/3368
222 [cargo/3409]: https://github.com/rust-lang/cargo/pull/3409
223 [cargo/3410]: https://github.com/rust-lang/cargo/pull/3410
224 [`std::iter::Iterator::min_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.min_by
225 [`std::iter::Iterator::max_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.max_by
226 [`std::os::*::fs::FileExt`]: https://doc.rust-lang.org/std/os/unix/fs/trait.FileExt.html
227 [`std::sync::atomic::Atomic*::get_mut`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.get_mut
228 [`std::sync::atomic::Atomic*::into_inner`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.into_inner
229 [`std::vec::IntoIter::as_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_slice
230 [`std::vec::IntoIter::as_mut_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_mut_slice
231 [`std::sync::mpsc::Receiver::try_iter`]: https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.try_iter
232 [`std::os::unix::process::CommandExt::before_exec`]: https://doc.rust-lang.org/std/os/unix/process/trait.CommandExt.html#tymethod.before_exec
233 [`std::rc::Rc::strong_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.strong_count
234 [`std::rc::Rc::weak_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.weak_count
235 [`std::sync::Arc::strong_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.strong_count
236 [`std::sync::Arc::weak_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.weak_count
237 [`std::char::encode_utf8`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf8
238 [`std::char::encode_utf16`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf16
239 [`std::cell::Ref::clone`]: https://doc.rust-lang.org/std/cell/struct.Ref.html#method.clone
240 [`std::io::Take::into_inner`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.into_inner
243 Version 1.14.0 (2016-12-22)
244 ===========================
249 * [`..` matches multiple tuple fields in enum variants, structs
250 and tuples][36843]. [RFC 1492].
251 * [Safe `fn` items can be coerced to `unsafe fn` pointers][37389]
252 * [`use *` and `use ::*` both glob-import from the crate root][37367]
253 * [It's now possible to call a `Vec<Box<Fn()>>` without explicit
254 dereferencing][36822]
259 * [Mark enums with non-zero discriminant as non-zero][37224]
260 * [Lower-case `static mut` names are linted like other
261 statics and consts][37162]
262 * [Fix ICE on some macros in const integer positions
263 (e.g. `[u8; m!()]`)][36819]
264 * [Improve error message and snippet for "did you mean `x`"][36798]
265 * [Add a panic-strategy field to the target specification][36794]
266 * [Include LLVM version in `--version --verbose`][37200]
268 Compile-time Optimizations
269 --------------------------
271 * [Improve macro expansion performance][37569]
272 * [Shrink `Expr_::ExprInlineAsm`][37445]
273 * [Replace all uses of SHA-256 with BLAKE2b][37439]
274 * [Reduce the number of bytes hashed by `IchHasher`][37427]
275 * [Avoid more allocations when compiling html5ever][37373]
276 * [Use `SmallVector` in `CombineFields::instantiate`][37322]
277 * [Avoid some allocations in the macro parser][37318]
278 * [Use a faster deflate setting][37298]
279 * [Add `ArrayVec` and `AccumulateVec` to reduce heap allocations
280 during interning of slices][37270]
281 * [Optimize `write_metadata`][37267]
282 * [Don't process obligation forest cycles when stalled][37231]
283 * [Avoid many `CrateConfig` clones][37161]
284 * [Optimize `Substs::super_fold_with`][37108]
285 * [Optimize `ObligationForest`'s `NodeState` handling][36993]
286 * [Speed up `plug_leaks`][36917]
291 * [`println!()`, with no arguments, prints newline][36825].
292 Previously, an empty string was required to achieve the same.
293 * [`Wrapping` impls standard binary and unary operators, as well as
294 the `Sum` and `Product` iterators][37356]
295 * [Implement `From<Cow<str>> for String` and `From<Cow<[T]>> for
297 * [Improve `fold` performance for `chain`, `cloned`, `map`, and
298 `VecDeque` iterators][37315]
299 * [Improve `SipHasher` performance on small values][37312]
300 * [Add Iterator trait TrustedLen to enable better FromIterator /
302 * [Expand `.zip()` specialization to `.map()` and `.cloned()`][37230]
303 * [`ReadDir` implements `Debug`][37221]
304 * [Implement `RefUnwindSafe` for atomic types][37178]
305 * [Specialize `Vec::extend` to `Vec::extend_from_slice`][37094]
306 * [Avoid allocations in `Decoder::read_str`][37064]
307 * [`io::Error` implements `From<io::ErrorKind>`][37037]
308 * [Impl `Debug` for raw pointers to unsized data][36880]
309 * [Don't reuse `HashMap` random seeds][37470]
310 * [The internal memory layout of `HashMap` is more cache-friendly, for
311 significant improvements in some operations][36692]
312 * [`HashMap` uses less memory on 32-bit architectures][36595]
313 * [Impl `Add<{str, Cow<str>}>` for `Cow<str>`][36430]
318 * [Expose rustc cfg values to build scripts][cargo/3243]
319 * [Allow cargo to work with read-only `CARGO_HOME`][cargo/3259]
320 * [Fix passing --features when testing multiple packages][cargo/3280]
321 * [Use a single profile set per workspace][cargo/3249]
322 * [Load `replace` sections from lock files][cargo/3220]
323 * [Ignore `panic` configuration for test/bench profiles][cargo/3175]
328 * [rustup is the recommended Rust installation method][1.14rustup]
329 * This release includes host (rustc) builds for Linux on MIPS, PowerPC, and
330 S390x. These are [tier 2] platforms and may have major defects. Follow the
331 instructions on the website to install, or add the targets to an existing
332 installation with `rustup target add`. The new target triples are:
333 - `mips-unknown-linux-gnu`
334 - `mipsel-unknown-linux-gnu`
335 - `mips64-unknown-linux-gnuabi64`
336 - `mips64el-unknown-linux-gnuabi64 `
337 - `powerpc-unknown-linux-gnu`
338 - `powerpc64-unknown-linux-gnu`
339 - `powerpc64le-unknown-linux-gnu`
340 - `s390x-unknown-linux-gnu `
341 * This release includes target (std) builds for ARM Linux running MUSL
342 libc. These are [tier 2] platforms and may have major defects. Add the
343 following triples to an existing rustup installation with `rustup target add`:
344 - `arm-unknown-linux-musleabi`
345 - `arm-unknown-linux-musleabihf`
346 - `armv7-unknown-linux-musleabihf`
347 * This release includes [experimental support for WebAssembly][1.14wasm], via
348 the `wasm32-unknown-emscripten` target. This target is known to have major
349 defects. Please test, report, and fix.
350 * rustup no longer installs documentation by default. Run `rustup
351 component add rust-docs` to install.
352 * [Fix line stepping in debugger][37310]
353 * [Enable line number debuginfo in releases][37280]
358 * [Disable jemalloc on aarch64/powerpc/mips][37392]
359 * [Add support for Fuchsia OS][37313]
360 * [Detect local-rebuild by only MAJOR.MINOR version][37273]
365 * [A number of forward-compatibility lints used by the compiler
366 to gradually introduce language changes have been converted
367 to deny by default][36894]:
368 - ["use of inaccessible extern crate erroneously allowed"][36886]
369 - ["type parameter default erroneously allowed in invalid location"][36887]
370 - ["detects super or self keywords at the beginning of global path"][36888]
371 - ["two overlapping inherent impls define an item with the same name
372 were erroneously allowed"][36889]
373 - ["floating-point constants cannot be used in patterns"][36890]
374 - ["constants of struct or enum type can only be used in a pattern if
375 the struct or enum has `#[derive(PartialEq, Eq)]`"][36891]
376 - ["lifetimes or labels named `'_` were erroneously allowed"][36892]
377 * [Prohibit patterns in trait methods without bodies][37378]
378 * [The atomic `Ordering` enum may not be matched exhaustively][37351]
379 * [Future-proofing `#[no_link]` breaks some obscure cases][37247]
380 * [The `$crate` macro variable is accepted in fewer locations][37213]
381 * [Impls specifying extra region requirements beyond the trait
382 they implement are rejected][37167]
383 * [Enums may not be unsized][37111]. Unsized enums are intended to
384 work but never have. For now they are forbidden.
385 * [Enforce the shadowing restrictions from RFC 1560 for today's macros][36767]
387 [tier 2]: https://forge.rust-lang.org/platform-support.html
388 [1.14rustup]: https://internals.rust-lang.org/t/beta-testing-rustup-rs/3316/204
389 [1.14wasm]: https://users.rust-lang.org/t/compiling-to-the-web-with-rust-and-emscripten/7627
390 [36430]: https://github.com/rust-lang/rust/pull/36430
391 [36595]: https://github.com/rust-lang/rust/pull/36595
392 [36595]: https://github.com/rust-lang/rust/pull/36595
393 [36692]: https://github.com/rust-lang/rust/pull/36692
394 [36767]: https://github.com/rust-lang/rust/pull/36767
395 [36794]: https://github.com/rust-lang/rust/pull/36794
396 [36798]: https://github.com/rust-lang/rust/pull/36798
397 [36819]: https://github.com/rust-lang/rust/pull/36819
398 [36822]: https://github.com/rust-lang/rust/pull/36822
399 [36825]: https://github.com/rust-lang/rust/pull/36825
400 [36843]: https://github.com/rust-lang/rust/pull/36843
401 [36880]: https://github.com/rust-lang/rust/pull/36880
402 [36886]: https://github.com/rust-lang/rust/issues/36886
403 [36887]: https://github.com/rust-lang/rust/issues/36887
404 [36888]: https://github.com/rust-lang/rust/issues/36888
405 [36889]: https://github.com/rust-lang/rust/issues/36889
406 [36890]: https://github.com/rust-lang/rust/issues/36890
407 [36891]: https://github.com/rust-lang/rust/issues/36891
408 [36892]: https://github.com/rust-lang/rust/issues/36892
409 [36894]: https://github.com/rust-lang/rust/pull/36894
410 [36917]: https://github.com/rust-lang/rust/pull/36917
411 [36993]: https://github.com/rust-lang/rust/pull/36993
412 [37037]: https://github.com/rust-lang/rust/pull/37037
413 [37064]: https://github.com/rust-lang/rust/pull/37064
414 [37094]: https://github.com/rust-lang/rust/pull/37094
415 [37108]: https://github.com/rust-lang/rust/pull/37108
416 [37111]: https://github.com/rust-lang/rust/pull/37111
417 [37161]: https://github.com/rust-lang/rust/pull/37161
418 [37162]: https://github.com/rust-lang/rust/pull/37162
419 [37167]: https://github.com/rust-lang/rust/pull/37167
420 [37178]: https://github.com/rust-lang/rust/pull/37178
421 [37200]: https://github.com/rust-lang/rust/pull/37200
422 [37213]: https://github.com/rust-lang/rust/pull/37213
423 [37221]: https://github.com/rust-lang/rust/pull/37221
424 [37224]: https://github.com/rust-lang/rust/pull/37224
425 [37230]: https://github.com/rust-lang/rust/pull/37230
426 [37231]: https://github.com/rust-lang/rust/pull/37231
427 [37247]: https://github.com/rust-lang/rust/pull/37247
428 [37267]: https://github.com/rust-lang/rust/pull/37267
429 [37270]: https://github.com/rust-lang/rust/pull/37270
430 [37273]: https://github.com/rust-lang/rust/pull/37273
431 [37280]: https://github.com/rust-lang/rust/pull/37280
432 [37298]: https://github.com/rust-lang/rust/pull/37298
433 [37306]: https://github.com/rust-lang/rust/pull/37306
434 [37310]: https://github.com/rust-lang/rust/pull/37310
435 [37312]: https://github.com/rust-lang/rust/pull/37312
436 [37313]: https://github.com/rust-lang/rust/pull/37313
437 [37315]: https://github.com/rust-lang/rust/pull/37315
438 [37318]: https://github.com/rust-lang/rust/pull/37318
439 [37322]: https://github.com/rust-lang/rust/pull/37322
440 [37326]: https://github.com/rust-lang/rust/pull/37326
441 [37351]: https://github.com/rust-lang/rust/pull/37351
442 [37356]: https://github.com/rust-lang/rust/pull/37356
443 [37367]: https://github.com/rust-lang/rust/pull/37367
444 [37373]: https://github.com/rust-lang/rust/pull/37373
445 [37378]: https://github.com/rust-lang/rust/pull/37378
446 [37389]: https://github.com/rust-lang/rust/pull/37389
447 [37392]: https://github.com/rust-lang/rust/pull/37392
448 [37427]: https://github.com/rust-lang/rust/pull/37427
449 [37439]: https://github.com/rust-lang/rust/pull/37439
450 [37445]: https://github.com/rust-lang/rust/pull/37445
451 [37470]: https://github.com/rust-lang/rust/pull/37470
452 [37569]: https://github.com/rust-lang/rust/pull/37569
453 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
454 [cargo/3175]: https://github.com/rust-lang/cargo/pull/3175
455 [cargo/3220]: https://github.com/rust-lang/cargo/pull/3220
456 [cargo/3243]: https://github.com/rust-lang/cargo/pull/3243
457 [cargo/3249]: https://github.com/rust-lang/cargo/pull/3249
458 [cargo/3259]: https://github.com/rust-lang/cargo/pull/3259
459 [cargo/3280]: https://github.com/rust-lang/cargo/pull/3280
462 Version 1.13.0 (2016-11-10)
463 ===========================
468 * [Stabilize the `?` operator][36995]. `?` is a simple way to propagate
469 errors, like the `try!` macro, described in [RFC 0243].
470 * [Stabilize macros in type position][36014]. Described in [RFC 873].
471 * [Stabilize attributes on statements][36995]. Described in [RFC 0016].
472 * [Fix `#[derive]` for empty tuple structs/variants][35728]
473 * [Fix lifetime rules for 'if' conditions][36029]
474 * [Avoid loading and parsing unconfigured non-inline modules][36482]
479 * [Add the `-C link-arg` argument][36574]
480 * [Remove the old AST-based backend from rustc_trans][35764]
481 * [Don't enable NEON by default on armv7 Linux][35814]
482 * [Fix debug line number info for macro expansions][35238]
483 * [Do not emit "class method" debuginfo for types that are not
484 DICompositeType][36008]
485 * [Warn about multiple conflicting #[repr] hints][34623]
486 * [When sizing DST, don't double-count nested struct prefixes][36351]
487 * [Default RUST_MIN_STACK to 16MiB for now][36505]
488 * [Improve rlib metadata format][36551]. Reduces rlib size significantly.
489 * [Reject macros with empty repetitions to avoid infinite loop][36721]
490 * [Expand macros without recursing to avoid stack overflows][36214]
495 * [Replace macro backtraces with labeled local uses][35702]
496 * [Improve error message for missplaced doc comments][33922]
497 * [Buffer unix and lock windows to prevent message interleaving][35975]
498 * [Update lifetime errors to specifically note temporaries][36171]
499 * [Special case a few colors for Windows][36178]
500 * [Suggest `use self` when such an import resolves][36289]
501 * [Be more specific when type parameter shadows primitive type][36338]
502 * Many minor improvements
504 Compile-time Optimizations
505 --------------------------
507 * [Compute and cache HIR hashes at beginning][35854]
508 * [Don't hash types in loan paths][36004]
509 * [Cache projections in trans][35761]
510 * [Optimize the parser's last token handling][36527]
511 * [Only instantiate #[inline] functions in codegen units referencing
512 them][36524]. This leads to big improvements in cases where crates export
513 define many inline functions without using them directly.
514 * [Lazily allocate TypedArena's first chunk][36592]
515 * [Don't allocate during default HashSet creation][36734]
522 * [`overflowing_abs`]
523 * [`RefCell::try_borrow`]
524 * [`RefCell::try_borrow_mut`]
529 * [Add `assert_ne!` and `debug_assert_ne!`][35074]
530 * [Make `vec_deque::Drain`, `hash_map::Drain`, and `hash_set::Drain`
532 * [Implement `AsRef<[T]>` for `std::slice::Iter`][35559]
533 * [Implement `Debug` for `std::vec::IntoIter`][35707]
534 * [`CString`: avoid excessive growth just to 0-terminate][35871]
535 * [Implement `CoerceUnsized` for `{Cell, RefCell, UnsafeCell}`][35627]
536 * [Use arc4rand on FreeBSD][35884]
537 * [memrchr: Correct aligned offset computation][35969]
538 * [Improve Demangling of Rust Symbols][36059]
539 * [Use monotonic time in condition variables][35048]
540 * [Implement `Debug` for `std::path::{Components,Iter}`][36101]
541 * [Implement conversion traits for `char`][35755]
542 * [Fix illegal instruction caused by overflow in channel cloning][36104]
543 * [Zero first byte of CString on drop][36264]
544 * [Inherit overflow checks for sum and product][36372]
545 * [Add missing Eq implementations][36423]
546 * [Implement `Debug` for `DirEntry`][36631]
547 * [When `getaddrinfo` returns `EAI_SYSTEM` retrieve actual error from
549 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
550 * [Implement more traits for `std::io::ErrorKind`][35911]
551 * [Optimize BinaryHeap bounds checking][36072]
552 * [Work around pointer aliasing issue in `Vec::extend_from_slice`,
553 `extend_with_element`][36355]
554 * [Fix overflow checking in unsigned pow()][34942]
559 * This release includes security fixes to both curl and OpenSSL.
560 * [Fix transitive doctests when panic=abort][cargo/3021]
561 * [Add --all-features flag to cargo][cargo/3038]
562 * [Reject path-based dependencies in `cargo package`][cargo/3060]
563 * [Don't parse the home directory more than once][cargo/3078]
564 * [Don't try to generate Cargo.lock on empty workspaces][cargo/3092]
565 * [Update OpenSSL to 1.0.2j][cargo/3121]
566 * [Add license and license_file to cargo metadata output][cargo/3110]
567 * [Make crates-io registry URL optional in config; ignore all changes to
568 source.crates-io][cargo/3089]
569 * [Don't download dependencies from other platforms][cargo/3123]
570 * [Build transitive dev-dependencies when needed][cargo/3125]
571 * [Add support for per-target rustflags in .cargo/config][cargo/3157]
572 * [Avoid updating registry when adding existing deps][cargo/3144]
573 * [Warn about path overrides that won't work][cargo/3136]
574 * [Use workspaces during `cargo install`][cargo/3146]
575 * [Leak mspdbsrv.exe processes on Windows][cargo/3162]
576 * [Add --message-format flag][cargo/3000]
577 * [Pass target environment for rustdoc][cargo/3205]
578 * [Use `CommandExt::exec` for `cargo run` on Unix][cargo/2818]
579 * [Update curl and curl-sys][cargo/3241]
580 * [Call rustdoc test with the correct cfg flags of a package][cargo/3242]
585 * [rustdoc: Add the `--sysroot` argument][36586]
586 * [rustdoc: Fix a couple of issues with the search results][35655]
587 * [rustdoc: remove the `!` from macro URLs and titles][35234]
588 * [gdb: Fix pretty-printing special-cased Rust types][35585]
589 * [rustdoc: Filter more incorrect methods inherited through Deref][36266]
594 * [Remove unmaintained style guide][35124]
595 * [Add s390x support][36369]
596 * [Initial work at Haiku OS support][36727]
597 * [Add mips-uclibc targets][35734]
598 * [Crate-ify compiler-rt into compiler-builtins][35021]
599 * [Add rustc version info (git hash + date) to dist tarball][36213]
600 * Many documentation improvements
605 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
606 * [Deny (by default) transmuting from fn item types to pointer-sized
607 types][34923]. Continuing the long transition to zero-sized fn items,
609 * [Fix `#[derive]` for empty tuple structs/variants][35728].
611 * [Issue deprecation warnings for safe accesses to extern statics][36173]
612 * [Fix lifetime rules for 'if' conditions][36029].
613 * [Inherit overflow checks for sum and product][36372].
614 * [Forbid user-defined macros named "macro_rules"][36730].
616 [33922]: https://github.com/rust-lang/rust/pull/33922
617 [34623]: https://github.com/rust-lang/rust/pull/34623
618 [34923]: https://github.com/rust-lang/rust/pull/34923
619 [34942]: https://github.com/rust-lang/rust/pull/34942
620 [34982]: https://github.com/rust-lang/rust/pull/34982
621 [35021]: https://github.com/rust-lang/rust/pull/35021
622 [35048]: https://github.com/rust-lang/rust/pull/35048
623 [35074]: https://github.com/rust-lang/rust/pull/35074
624 [35124]: https://github.com/rust-lang/rust/pull/35124
625 [35234]: https://github.com/rust-lang/rust/pull/35234
626 [35238]: https://github.com/rust-lang/rust/pull/35238
627 [35354]: https://github.com/rust-lang/rust/pull/35354
628 [35559]: https://github.com/rust-lang/rust/pull/35559
629 [35585]: https://github.com/rust-lang/rust/pull/35585
630 [35627]: https://github.com/rust-lang/rust/pull/35627
631 [35655]: https://github.com/rust-lang/rust/pull/35655
632 [35702]: https://github.com/rust-lang/rust/pull/35702
633 [35707]: https://github.com/rust-lang/rust/pull/35707
634 [35728]: https://github.com/rust-lang/rust/pull/35728
635 [35734]: https://github.com/rust-lang/rust/pull/35734
636 [35755]: https://github.com/rust-lang/rust/pull/35755
637 [35761]: https://github.com/rust-lang/rust/pull/35761
638 [35764]: https://github.com/rust-lang/rust/pull/35764
639 [35814]: https://github.com/rust-lang/rust/pull/35814
640 [35854]: https://github.com/rust-lang/rust/pull/35854
641 [35871]: https://github.com/rust-lang/rust/pull/35871
642 [35884]: https://github.com/rust-lang/rust/pull/35884
643 [35911]: https://github.com/rust-lang/rust/pull/35911
644 [35969]: https://github.com/rust-lang/rust/pull/35969
645 [35975]: https://github.com/rust-lang/rust/pull/35975
646 [36004]: https://github.com/rust-lang/rust/pull/36004
647 [36008]: https://github.com/rust-lang/rust/pull/36008
648 [36014]: https://github.com/rust-lang/rust/pull/36014
649 [36029]: https://github.com/rust-lang/rust/pull/36029
650 [36059]: https://github.com/rust-lang/rust/pull/36059
651 [36072]: https://github.com/rust-lang/rust/pull/36072
652 [36101]: https://github.com/rust-lang/rust/pull/36101
653 [36104]: https://github.com/rust-lang/rust/pull/36104
654 [36171]: https://github.com/rust-lang/rust/pull/36171
655 [36173]: https://github.com/rust-lang/rust/pull/36173
656 [36178]: https://github.com/rust-lang/rust/pull/36178
657 [36213]: https://github.com/rust-lang/rust/pull/36213
658 [36214]: https://github.com/rust-lang/rust/pull/36214
659 [36264]: https://github.com/rust-lang/rust/pull/36264
660 [36266]: https://github.com/rust-lang/rust/pull/36266
661 [36289]: https://github.com/rust-lang/rust/pull/36289
662 [36338]: https://github.com/rust-lang/rust/pull/36338
663 [36351]: https://github.com/rust-lang/rust/pull/36351
664 [36355]: https://github.com/rust-lang/rust/pull/36355
665 [36369]: https://github.com/rust-lang/rust/pull/36369
666 [36372]: https://github.com/rust-lang/rust/pull/36372
667 [36423]: https://github.com/rust-lang/rust/pull/36423
668 [36482]: https://github.com/rust-lang/rust/pull/36482
669 [36505]: https://github.com/rust-lang/rust/pull/36505
670 [36524]: https://github.com/rust-lang/rust/pull/36524
671 [36527]: https://github.com/rust-lang/rust/pull/36527
672 [36551]: https://github.com/rust-lang/rust/pull/36551
673 [36574]: https://github.com/rust-lang/rust/pull/36574
674 [36586]: https://github.com/rust-lang/rust/pull/36586
675 [36592]: https://github.com/rust-lang/rust/pull/36592
676 [36631]: https://github.com/rust-lang/rust/pull/36631
677 [36639]: https://github.com/rust-lang/rust/pull/36639
678 [36721]: https://github.com/rust-lang/rust/pull/36721
679 [36727]: https://github.com/rust-lang/rust/pull/36727
680 [36730]: https://github.com/rust-lang/rust/pull/36730
681 [36734]: https://github.com/rust-lang/rust/pull/36734
682 [36754]: https://github.com/rust-lang/rust/pull/36754
683 [36995]: https://github.com/rust-lang/rust/pull/36995
684 [RFC 0016]: https://github.com/rust-lang/rfcs/blob/master/text/0016-more-attributes.md
685 [RFC 0243]: https://github.com/rust-lang/rfcs/blob/master/text/0243-trait-based-exception-handling.md
686 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
687 [RFC 401]: https://github.com/rust-lang/rfcs/blob/master/text/0401-coercions.md
688 [RFC 873]: https://github.com/rust-lang/rfcs/blob/master/text/0873-type-macros.md
689 [cargo/2818]: https://github.com/rust-lang/cargo/pull/2818
690 [cargo/3000]: https://github.com/rust-lang/cargo/pull/3000
691 [cargo/3021]: https://github.com/rust-lang/cargo/pull/3021
692 [cargo/3038]: https://github.com/rust-lang/cargo/pull/3038
693 [cargo/3060]: https://github.com/rust-lang/cargo/pull/3060
694 [cargo/3078]: https://github.com/rust-lang/cargo/pull/3078
695 [cargo/3089]: https://github.com/rust-lang/cargo/pull/3089
696 [cargo/3092]: https://github.com/rust-lang/cargo/pull/3092
697 [cargo/3110]: https://github.com/rust-lang/cargo/pull/3110
698 [cargo/3121]: https://github.com/rust-lang/cargo/pull/3121
699 [cargo/3123]: https://github.com/rust-lang/cargo/pull/3123
700 [cargo/3125]: https://github.com/rust-lang/cargo/pull/3125
701 [cargo/3136]: https://github.com/rust-lang/cargo/pull/3136
702 [cargo/3144]: https://github.com/rust-lang/cargo/pull/3144
703 [cargo/3146]: https://github.com/rust-lang/cargo/pull/3146
704 [cargo/3157]: https://github.com/rust-lang/cargo/pull/3157
705 [cargo/3162]: https://github.com/rust-lang/cargo/pull/3162
706 [cargo/3205]: https://github.com/rust-lang/cargo/pull/3205
707 [cargo/3241]: https://github.com/rust-lang/cargo/pull/3241
708 [cargo/3242]: https://github.com/rust-lang/cargo/pull/3242
709 [rustup]: https://www.rustup.rs
710 [`checked_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.checked_abs
711 [`wrapping_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.wrapping_abs
712 [`overflowing_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.overflowing_abs
713 [`RefCell::try_borrow`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow
714 [`RefCell::try_borrow_mut`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow_mut
715 [`SipHasher`]: https://doc.rust-lang.org/std/hash/struct.SipHasher.html
716 [`DefaultHasher`]: https://doc.rust-lang.org/std/collections/hash_map/struct.DefaultHasher.html
719 Version 1.12.1 (2016-10-20)
720 ===========================
725 * [ICE: 'rustc' panicked at 'assertion failed: concrete_substs.is_normalized_for_trans()' #36381][36381]
726 * [Confusion with double negation and booleans][36856]
727 * [rustc 1.12.0 fails with SIGSEGV in release mode (syn crate 0.8.0)][36875]
728 * [Rustc 1.12.0 Windows build of `ethcore` crate fails with LLVM error][36924]
729 * [1.12.0: High memory usage when linking in release mode with debug info][36926]
730 * [Corrupted memory after updated to 1.12][36936]
731 * ["Let NullaryConstructor = something;" causes internal compiler error: "tried to overwrite interned AdtDef"][37026]
732 * [Fix ICE: inject bitcast if types mismatch for invokes/calls/stores][37112]
733 * [debuginfo: Handle spread_arg case in MIR-trans in a more stable way.][37153]
735 [36381]: https://github.com/rust-lang/rust/issues/36381
736 [36856]: https://github.com/rust-lang/rust/issues/36856
737 [36875]: https://github.com/rust-lang/rust/issues/36875
738 [36924]: https://github.com/rust-lang/rust/issues/36924
739 [36926]: https://github.com/rust-lang/rust/issues/36926
740 [36936]: https://github.com/rust-lang/rust/issues/36936
741 [37026]: https://github.com/rust-lang/rust/issues/37026
742 [37112]: https://github.com/rust-lang/rust/issues/37112
743 [37153]: https://github.com/rust-lang/rust/issues/37153
746 Version 1.12.0 (2016-09-29)
747 ===========================
752 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)]
753 (https://github.com/rust-lang/rust/pull/34096).
754 This translation pass is far simpler than the previous AST->LLVM pass, and
755 creates opportunities to perform new optimizations directly on the MIR. It
756 was previously described [on the Rust blog]
757 (https://blog.rust-lang.org/2016/04/19/MIR.html).
758 * [`rustc` presents a new, more readable error format, along with
759 machine-readable JSON error output for use by IDEs]
760 (https://github.com/rust-lang/rust/pull/35401).
761 Most common editors supporting Rust have been updated to work with it. It was
762 previously described [on the Rust blog]
763 (https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
768 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)]
769 (https://github.com/rust-lang/rust/pull/34096).
770 This translation pass is far simpler than the previous AST->LLVM pass, and
771 creates opportunities to perform new optimizations directly on the MIR. It
772 was previously described [on the Rust blog]
773 (https://blog.rust-lang.org/2016/04/19/MIR.html).
774 * [Print the Rust target name, not the LLVM target name, with
775 `--print target-list`]
776 (https://github.com/rust-lang/rust/pull/35489)
777 * [The computation of `TypeId` is correct in some cases where it was previously
778 producing inconsistent results]
779 (https://github.com/rust-lang/rust/pull/35267)
780 * [The `mips-unknown-linux-gnu` target uses hardware floating point by default]
781 (https://github.com/rust-lang/rust/pull/34910)
782 * [The `rustc` arguments, `--print target-cpus`, `--print target-features`,
783 `--print relocation-models`, and `--print code-models` print the available
784 options to the `-C target-cpu`, `-C target-feature`, `-C relocation-model` and
785 `-C code-model` code generation arguments]
786 (https://github.com/rust-lang/rust/pull/34845)
787 * [`rustc` supports three new MUSL targets on ARM: `arm-unknown-linux-musleabi`,
788 `arm-unknown-linux-musleabihf`, and `armv7-unknown-linux-musleabihf`]
789 (https://github.com/rust-lang/rust/pull/35060).
790 These targets produce statically-linked binaries. There are no binary release
796 * [`rustc` presents a new, more readable error format, along with
797 machine-readable JSON error output for use by IDEs]
798 (https://github.com/rust-lang/rust/pull/35401).
799 Most common editors supporting Rust have been updated to work with it. It was
800 previously described [on the Rust blog]
801 (https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
802 * [In error descriptions, references are now described in plain English,
803 instead of as "&-ptr"]
804 (https://github.com/rust-lang/rust/pull/35611)
805 * [In error type descriptions, unknown numeric types are named `{integer}` or
806 `{float}` instead of `_`]
807 (https://github.com/rust-lang/rust/pull/35080)
808 * [`rustc` emits a clearer error when inner attributes follow a doc comment]
809 (https://github.com/rust-lang/rust/pull/34676)
814 * [`macro_rules!` invocations can be made within `macro_rules!` invocations]
815 (https://github.com/rust-lang/rust/pull/34925)
816 * [`macro_rules!` meta-variables are hygienic]
817 (https://github.com/rust-lang/rust/pull/35453)
818 * [`macro_rules!` `tt` matchers can be reparsed correctly, making them much more
820 (https://github.com/rust-lang/rust/pull/34908)
821 * [`macro_rules!` `stmt` matchers correctly consume the entire contents when
822 inside non-braces invocations]
823 (https://github.com/rust-lang/rust/pull/34886)
824 * [Semicolons are properly required as statement delimeters inside
825 `macro_rules!` invocations]
826 (https://github.com/rust-lang/rust/pull/34660)
827 * [`cfg_attr` works on `path` attributes]
828 (https://github.com/rust-lang/rust/pull/34546)
834 (https://doc.rust-lang.org/std/cell/struct.Cell.html#method.as_ptr)
835 * [`RefCell::as_ptr`]
836 (https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.as_ptr)
837 * [`IpAddr::is_unspecified`]
838 (https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_unspecified)
839 * [`IpAddr::is_loopback`]
840 (https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_loopback)
841 * [`IpAddr::is_multicast`]
842 (https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_multicast)
843 * [`Ipv4Addr::is_unspecified`]
844 (https://doc.rust-lang.org/std/net/struct.Ipv4Addr.html#method.is_unspecified)
845 * [`Ipv6Addr::octets`]
846 (https://doc.rust-lang.org/std/net/struct.Ipv6Addr.html#method.octets)
847 * [`LinkedList::contains`]
848 (https://doc.rust-lang.org/std/collections/linked_list/struct.LinkedList.html#method.contains)
849 * [`VecDeque::contains`]
850 (https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.contains)
851 * [`ExitStatusExt::from_raw`]
852 (https://doc.rust-lang.org/std/os/unix/process/trait.ExitStatusExt.html#tymethod.from_raw).
853 Both on Unix and Windows.
854 * [`Receiver::recv_timeout`]
855 (https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.recv_timeout)
856 * [`RecvTimeoutError`]
857 (https://doc.rust-lang.org/std/sync/mpsc/enum.RecvTimeoutError.html)
858 * [`BinaryHeap::peek_mut`]
859 (https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.peek_mut)
861 (https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html)
863 (https://doc.rust-lang.org/std/iter/trait.Product.html)
865 (https://doc.rust-lang.org/std/iter/trait.Sum.html)
866 * [`OccupiedEntry::remove_entry`]
867 (https://doc.rust-lang.org/std/collections/btree_map/struct.OccupiedEntry.html#method.remove_entry)
868 * [`VacantEntry::into_key`]
869 (https://doc.rust-lang.org/std/collections/btree_map/struct.VacantEntry.html#method.into_key)
874 * [The `format!` macro and friends now allow a single argument to be formatted
876 (https://github.com/rust-lang/rust/pull/33642)
877 * [The lifetime bounds on `[T]::binary_search_by` and
878 `[T]::binary_search_by_key` have been adjusted to be more flexible]
879 (https://github.com/rust-lang/rust/pull/34762)
880 * [`Option` implements `From` for its contained type]
881 (https://github.com/rust-lang/rust/pull/34828)
882 * [`Cell`, `RefCell` and `UnsafeCell` implement `From` for their contained type]
883 (https://github.com/rust-lang/rust/pull/35392)
884 * [`RwLock` panics if the reader count overflows]
885 (https://github.com/rust-lang/rust/pull/35378)
886 * [`vec_deque::Drain`, `hash_map::Drain` and `hash_set::Drain` are covariant]
887 (https://github.com/rust-lang/rust/pull/35354)
888 * [`vec::Drain` and `binary_heap::Drain` are covariant]
889 (https://github.com/rust-lang/rust/pull/34951)
890 * [`Cow<str>` implements `FromIterator` for `char`, `&str` and `String`]
891 (https://github.com/rust-lang/rust/pull/35064)
892 * [Sockets on Linux are correctly closed in subprocesses via `SOCK_CLOEXEC`]
893 (https://github.com/rust-lang/rust/pull/34946)
894 * [`hash_map::Entry`, `hash_map::VacantEntry` and `hash_map::OccupiedEntry`
896 (https://github.com/rust-lang/rust/pull/34937)
897 * [`btree_map::Entry`, `btree_map::VacantEntry` and `btree_map::OccupiedEntry`
899 (https://github.com/rust-lang/rust/pull/34885)
900 * [`String` implements `AddAssign`]
901 (https://github.com/rust-lang/rust/pull/34890)
902 * [Variadic `extern fn` pointers implement the `Clone`, `PartialEq`, `Eq`,
903 `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and `fmt::Debug` traits]
904 (https://github.com/rust-lang/rust/pull/34879)
905 * [`FileType` implements `Debug`]
906 (https://github.com/rust-lang/rust/pull/34757)
907 * [References to `Mutex` and `RwLock` are unwind-safe]
908 (https://github.com/rust-lang/rust/pull/34756)
909 * [`mpsc::sync_channel` `Receiver`s return any available message before
910 reporting a disconnect]
911 (https://github.com/rust-lang/rust/pull/34731)
912 * [Unicode definitions have been updated to 9.0]
913 (https://github.com/rust-lang/rust/pull/34599)
914 * [`env` iterators implement `DoubleEndedIterator`]
915 (https://github.com/rust-lang/rust/pull/33312)
920 * [Support local mirrors of registries]
921 (https://github.com/rust-lang/cargo/pull/2857)
922 * [Add support for command aliases]
923 (https://github.com/rust-lang/cargo/pull/2679)
924 * [Allow `opt-level="s"` / `opt-level="z"` in profile overrides]
925 (https://github.com/rust-lang/cargo/pull/3007)
926 * [Make `cargo doc --open --target` work as expected]
927 (https://github.com/rust-lang/cargo/pull/2988)
928 * [Speed up noop registry updates]
929 (https://github.com/rust-lang/cargo/pull/2974)
931 (https://github.com/rust-lang/cargo/pull/2971)
932 * [Fix `--panic=abort` with plugins]
933 (https://github.com/rust-lang/cargo/pull/2954)
934 * [Always pass `-C metadata` to the compiler]
935 (https://github.com/rust-lang/cargo/pull/2946)
936 * [Fix depending on git repos with workspaces]
937 (https://github.com/rust-lang/cargo/pull/2938)
938 * [Add a `--lib` flag to `cargo new`]
939 (https://github.com/rust-lang/cargo/pull/2921)
940 * [Add `http.cainfo` for custom certs]
941 (https://github.com/rust-lang/cargo/pull/2917)
942 * [Indicate the compilation profile after compiling]
943 (https://github.com/rust-lang/cargo/pull/2909)
944 * [Allow enabling features for dependencies with `--features`]
945 (https://github.com/rust-lang/cargo/pull/2876)
946 * [Add `--jobs` flag to `cargo package`]
947 (https://github.com/rust-lang/cargo/pull/2867)
948 * [Add `--dry-run` to `cargo publish`]
949 (https://github.com/rust-lang/cargo/pull/2849)
950 * [Add support for `RUSTDOCFLAGS`]
951 (https://github.com/rust-lang/cargo/pull/2794)
956 * [`panic::catch_unwind` is more optimized]
957 (https://github.com/rust-lang/rust/pull/35444)
958 * [`panic::catch_unwind` no longer accesses thread-local storage on entry]
959 (https://github.com/rust-lang/rust/pull/34866)
964 * [Test binaries now support a `--test-threads` argument to specify the number
965 of threads used to run tests, and which acts the same as the
966 `RUST_TEST_THREADS` environment variable]
967 (https://github.com/rust-lang/rust/pull/35414)
968 * [The test runner now emits a warning when tests run over 60 seconds]
969 (https://github.com/rust-lang/rust/pull/35405)
970 * [rustdoc: Fix methods in search results]
971 (https://github.com/rust-lang/rust/pull/34752)
972 * [`rust-lldb` warns about unsupported versions of LLDB]
973 (https://github.com/rust-lang/rust/pull/34646)
974 * [Rust releases now come with source packages that can be installed by rustup
975 via `rustup component add rust-src`]
976 (https://github.com/rust-lang/rust/pull/34366).
977 The resulting source code can be used by tools and IDES, located in the
978 sysroot under `lib/rustlib/src`.
983 * [The compiler can now be built against LLVM 3.9]
984 (https://github.com/rust-lang/rust/pull/35594)
985 * Many minor improvements to the documentation.
986 * [The Rust exception handling "personality" routine is now written in Rust]
987 (https://github.com/rust-lang/rust/pull/34832)
992 * [When printing Windows `OsStr`s, unpaired surrogate codepoints are escaped
993 with the lowercase format instead of the uppercase]
994 (https://github.com/rust-lang/rust/pull/35084)
995 * [When formatting strings, if "precision" is specified, the "fill",
996 "align" and "width" specifiers are no longer ignored]
997 (https://github.com/rust-lang/rust/pull/34544)
998 * [The `Debug` impl for strings no longer escapes all non-ASCII characters]
999 (https://github.com/rust-lang/rust/pull/34485)
1002 Version 1.11.0 (2016-08-18)
1003 ===========================
1008 * [`cfg_attr` works on `path` attributes]
1009 (https://github.com/rust-lang/rust/pull/34546)
1010 * [Support nested `cfg_attr` attributes]
1011 (https://github.com/rust-lang/rust/pull/34216)
1012 * [Allow statement-generating braced macro invocations at the end of blocks]
1013 (https://github.com/rust-lang/rust/pull/34436)
1014 * [Macros can be expanded inside of trait definitions]
1015 (https://github.com/rust-lang/rust/pull/34213)
1016 * [`#[macro_use]` works properly when it is itself expanded from a macro]
1017 (https://github.com/rust-lang/rust/pull/34032)
1022 * [`BinaryHeap::append`]
1023 (https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.append)
1024 * [`BTreeMap::append`]
1025 (https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.append)
1026 * [`BTreeMap::split_off`]
1027 (https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.split_off)
1028 * [`BTreeSet::append`]
1029 (https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.append)
1030 * [`BTreeSet::split_off`]
1031 (https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.split_off)
1032 * [`f32::to_degrees`]
1033 (https://doc.rust-lang.org/std/primitive.f32.html#method.to_degrees)
1034 (in libcore - previously stabilized in libstd)
1035 * [`f32::to_radians`]
1036 (https://doc.rust-lang.org/std/primitive.f32.html#method.to_radians)
1037 (in libcore - previously stabilized in libstd)
1038 * [`f64::to_degrees`]
1039 (https://doc.rust-lang.org/std/primitive.f64.html#method.to_degrees)
1040 (in libcore - previously stabilized in libstd)
1041 * [`f64::to_radians`]
1042 (https://doc.rust-lang.org/std/primitive.f64.html#method.to_radians)
1043 (in libcore - previously stabilized in libstd)
1045 (https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
1046 * [`Iterator::product`]
1047 (https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
1049 (https://doc.rust-lang.org/std/cell/struct.Cell.html#method.get_mut)
1050 * [`RefCell::get_mut`]
1051 (https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.get_mut)
1056 * [The `thread_local!` macro supports multiple definitions in a single
1057 invocation, and can apply attributes]
1058 (https://github.com/rust-lang/rust/pull/34077)
1059 * [`Cow` implements `Default`]
1060 (https://github.com/rust-lang/rust/pull/34305)
1061 * [`Wrapping` implements binary, octal, lower-hex and upper-hex
1062 `Display` formatting]
1063 (https://github.com/rust-lang/rust/pull/34190)
1064 * [The range types implement `Hash`]
1065 (https://github.com/rust-lang/rust/pull/34180)
1066 * [`lookup_host` ignores unknown address types]
1067 (https://github.com/rust-lang/rust/pull/34067)
1068 * [`assert_eq!` accepts a custom error message, like `assert!` does]
1069 (https://github.com/rust-lang/rust/pull/33976)
1070 * [The main thread is now called "main" instead of "<main>"]
1071 (https://github.com/rust-lang/rust/pull/33803)
1076 * [Disallow specifying features of transitive deps]
1077 (https://github.com/rust-lang/cargo/pull/2821)
1078 * [Add color support for Windows consoles]
1079 (https://github.com/rust-lang/cargo/pull/2804)
1080 * [Fix `harness = false` on `[lib]` sections]
1081 (https://github.com/rust-lang/cargo/pull/2795)
1082 * [Don't panic when `links` contains a '.']
1083 (https://github.com/rust-lang/cargo/pull/2787)
1084 * [Build scripts can emit warnings]
1085 (https://github.com/rust-lang/cargo/pull/2630),
1086 and `-vv` prints warnings for all crates.
1087 * [Ignore file locks on OS X NFS mounts]
1088 (https://github.com/rust-lang/cargo/pull/2720)
1089 * [Don't warn about `package.metadata` keys]
1090 (https://github.com/rust-lang/cargo/pull/2668).
1091 This provides room for expansion by arbitrary tools.
1092 * [Add support for cdylib crate types]
1093 (https://github.com/rust-lang/cargo/pull/2741)
1094 * [Prevent publishing crates when files are dirty]
1095 (https://github.com/rust-lang/cargo/pull/2781)
1096 * [Don't fetch all crates on clean]
1097 (https://github.com/rust-lang/cargo/pull/2704)
1098 * [Propagate --color option to rustc]
1099 (https://github.com/rust-lang/cargo/pull/2779)
1100 * [Fix `cargo doc --open` on Windows]
1101 (https://github.com/rust-lang/cargo/pull/2780)
1102 * [Improve autocompletion]
1103 (https://github.com/rust-lang/cargo/pull/2772)
1104 * [Configure colors of stderr as well as stdout]
1105 (https://github.com/rust-lang/cargo/pull/2739)
1110 * [Caching projections speeds up type check dramatically for some
1112 (https://github.com/rust-lang/rust/pull/33816)
1113 * [The default `HashMap` hasher is SipHash 1-3 instead of SipHash 2-4]
1114 (https://github.com/rust-lang/rust/pull/33940)
1115 This hasher is faster, but is believed to provide sufficient
1116 protection from collision attacks.
1117 * [Comparison of `Ipv4Addr` is 10x faster]
1118 (https://github.com/rust-lang/rust/pull/33891)
1123 * [Fix empty implementation section on some module pages]
1124 (https://github.com/rust-lang/rust/pull/34536)
1125 * [Fix inlined renamed reexports in import lists]
1126 (https://github.com/rust-lang/rust/pull/34479)
1127 * [Fix search result layout for enum variants and struct fields]
1128 (https://github.com/rust-lang/rust/pull/34477)
1129 * [Fix issues with source links to external crates]
1130 (https://github.com/rust-lang/rust/pull/34387)
1131 * [Fix redirect pages for renamed reexports]
1132 (https://github.com/rust-lang/rust/pull/34245)
1137 * [rustc is better at finding the MSVC toolchain]
1138 (https://github.com/rust-lang/rust/pull/34492)
1139 * [When emitting debug info, rustc emits frame pointers for closures,
1140 shims and glue, as it does for all other functions]
1141 (https://github.com/rust-lang/rust/pull/33909)
1142 * [rust-lldb warns about unsupported versions of LLDB]
1143 (https://github.com/rust-lang/rust/pull/34646)
1144 * Many more errors have been given error codes and extended
1146 * API documentation continues to be improved, with many new examples
1151 * [rustc no longer hangs when dependencies recursively re-export
1153 (https://github.com/rust-lang/rust/pull/34542)
1154 * [rustc requires LLVM 3.7+]
1155 (https://github.com/rust-lang/rust/pull/34104)
1156 * [The 'How Safe and Unsafe Interact' chapter of The Rustonomicon was
1158 (https://github.com/rust-lang/rust/pull/33895)
1159 * [rustc support 16-bit pointer sizes]
1160 (https://github.com/rust-lang/rust/pull/33460).
1161 No targets use this yet, but it works toward AVR support.
1166 * [`const`s and `static`s may not have unsized types]
1167 (https://github.com/rust-lang/rust/pull/34443)
1168 * [The new follow-set rules that place restrictions on `macro_rules!`
1169 in order to ensure syntax forward-compatibility have been enabled]
1170 (https://github.com/rust-lang/rust/pull/33982)
1171 This was an [ammendment to RFC 550]
1172 (https://github.com/rust-lang/rfcs/pull/1384),
1173 and has been a warning since 1.10.
1174 * [`cfg` attribute process has been refactored to fix various bugs]
1175 (https://github.com/rust-lang/rust/pull/33706).
1176 This causes breakage in some corner cases.
1179 Version 1.10.0 (2016-07-07)
1180 ===========================
1185 * [Allow `concat_idents!` in type positions as well as in expression
1187 (https://github.com/rust-lang/rust/pull/33735).
1188 * [`Copy` types are required to have a trivial implementation of `Clone`]
1189 (https://github.com/rust-lang/rust/pull/33420).
1190 [RFC 1521](https://github.com/rust-lang/rfcs/blob/master/text/1521-copy-clone-semantics.md).
1191 * [Single-variant enums support the `#[repr(..)]` attribute]
1192 (https://github.com/rust-lang/rust/pull/33355).
1193 * [Fix `#[derive(RustcEncodable)]` in the presence of other `encode` methods]
1194 (https://github.com/rust-lang/rust/pull/32908).
1195 * [`panic!` can be converted to a runtime abort with the
1196 `-C panic=abort` flag]
1197 (https://github.com/rust-lang/rust/pull/32900).
1198 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
1199 * [Add a new crate type, 'cdylib']
1200 (https://github.com/rust-lang/rust/pull/33553).
1201 cdylibs are dynamic libraries suitable for loading by non-Rust hosts.
1202 [RFC 1510](https://github.com/rust-lang/rfcs/blob/master/text/1510-rdylib.md).
1203 Note that Cargo does not yet directly support cdylibs.
1208 * `os::windows::fs::OpenOptionsExt::access_mode`
1209 * `os::windows::fs::OpenOptionsExt::share_mode`
1210 * `os::windows::fs::OpenOptionsExt::custom_flags`
1211 * `os::windows::fs::OpenOptionsExt::attributes`
1212 * `os::windows::fs::OpenOptionsExt::security_qos_flags`
1213 * `os::unix::fs::OpenOptionsExt::custom_flags`
1214 * [`sync::Weak::new`]
1215 (http://doc.rust-lang.org/alloc/arc/struct.Weak.html#method.new)
1216 * `Default for sync::Weak`
1217 * [`panic::set_hook`]
1218 (http://doc.rust-lang.org/std/panic/fn.set_hook.html)
1219 * [`panic::take_hook`]
1220 (http://doc.rust-lang.org/std/panic/fn.take_hook.html)
1221 * [`panic::PanicInfo`]
1222 (http://doc.rust-lang.org/std/panic/struct.PanicInfo.html)
1223 * [`panic::PanicInfo::payload`]
1224 (http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.payload)
1225 * [`panic::PanicInfo::location`]
1226 (http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.location)
1227 * [`panic::Location`]
1228 (http://doc.rust-lang.org/std/panic/struct.Location.html)
1229 * [`panic::Location::file`]
1230 (http://doc.rust-lang.org/std/panic/struct.Location.html#method.file)
1231 * [`panic::Location::line`]
1232 (http://doc.rust-lang.org/std/panic/struct.Location.html#method.line)
1233 * [`ffi::CStr::from_bytes_with_nul`]
1234 (http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul)
1235 * [`ffi::CStr::from_bytes_with_nul_unchecked`]
1236 (http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul_unchecked)
1237 * [`ffi::FromBytesWithNulError`]
1238 (http://doc.rust-lang.org/std/ffi/struct.FromBytesWithNulError.html)
1239 * [`fs::Metadata::modified`]
1240 (http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.modified)
1241 * [`fs::Metadata::accessed`]
1242 (http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.accessed)
1243 * [`fs::Metadata::created`]
1244 (http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.created)
1245 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange`
1246 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange_weak`
1247 * `collections::{btree,hash}_map::{Occupied,Vacant,}Entry::key`
1248 * `os::unix::net::{UnixStream, UnixListener, UnixDatagram, SocketAddr}`
1249 * [`SocketAddr::is_unnamed`]
1250 (http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.is_unnamed)
1251 * [`SocketAddr::as_pathname`]
1252 (http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.as_pathname)
1253 * [`UnixStream::connect`]
1254 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.connect)
1255 * [`UnixStream::pair`]
1256 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.pair)
1257 * [`UnixStream::try_clone`]
1258 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.try_clone)
1259 * [`UnixStream::local_addr`]
1260 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.local_addr)
1261 * [`UnixStream::peer_addr`]
1262 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.peer_addr)
1263 * [`UnixStream::set_read_timeout`]
1264 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
1265 * [`UnixStream::set_write_timeout`]
1266 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
1267 * [`UnixStream::read_timeout`]
1268 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
1269 * [`UnixStream::write_timeout`]
1270 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
1271 * [`UnixStream::set_nonblocking`]
1272 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.set_nonblocking)
1273 * [`UnixStream::take_error`]
1274 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.take_error)
1275 * [`UnixStream::shutdown`]
1276 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.shutdown)
1277 * Read/Write/RawFd impls for `UnixStream`
1278 * [`UnixListener::bind`]
1279 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.bind)
1280 * [`UnixListener::accept`]
1281 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.accept)
1282 * [`UnixListener::try_clone`]
1283 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.try_clone)
1284 * [`UnixListener::local_addr`]
1285 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.local_addr)
1286 * [`UnixListener::set_nonblocking`]
1287 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.set_nonblocking)
1288 * [`UnixListener::take_error`]
1289 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.take_error)
1290 * [`UnixListener::incoming`]
1291 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.incoming)
1292 * RawFd impls for `UnixListener`
1293 * [`UnixDatagram::bind`]
1294 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.bind)
1295 * [`UnixDatagram::unbound`]
1296 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.unbound)
1297 * [`UnixDatagram::pair`]
1298 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.pair)
1299 * [`UnixDatagram::connect`]
1300 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.connect)
1301 * [`UnixDatagram::try_clone`]
1302 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.try_clone)
1303 * [`UnixDatagram::local_addr`]
1304 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.local_addr)
1305 * [`UnixDatagram::peer_addr`]
1306 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.peer_addr)
1307 * [`UnixDatagram::recv_from`]
1308 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv_from)
1309 * [`UnixDatagram::recv`]
1310 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv)
1311 * [`UnixDatagram::send_to`]
1312 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send_to)
1313 * [`UnixDatagram::send`]
1314 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send)
1315 * [`UnixDatagram::set_read_timeout`]
1316 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_read_timeout)
1317 * [`UnixDatagram::set_write_timeout`]
1318 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_write_timeout)
1319 * [`UnixDatagram::read_timeout`]
1320 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.read_timeout)
1321 * [`UnixDatagram::write_timeout`]
1322 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.write_timeout)
1323 * [`UnixDatagram::set_nonblocking`]
1324 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_nonblocking)
1325 * [`UnixDatagram::take_error`]
1326 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.take_error)
1327 * [`UnixDatagram::shutdown`]
1328 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.shutdown)
1329 * RawFd impls for `UnixDatagram`
1330 * `{BTree,Hash}Map::values_mut`
1331 * [`<[_]>::binary_search_by_key`]
1332 (http://doc.rust-lang.org/beta/std/primitive.slice.html#method.binary_search_by_key)
1337 * [The `abs_sub` method of floats is deprecated]
1338 (https://github.com/rust-lang/rust/pull/33664).
1339 The semantics of this minor method are subtle and probably not what
1341 * [Add implementation of Ord for Cell<T> and RefCell<T> where T: Ord]
1342 (https://github.com/rust-lang/rust/pull/33306).
1343 * [On Linux, if `HashMap`s can't be initialized with `getrandom` they
1344 will fall back to `/dev/urandom` temporarily to avoid blocking
1346 (https://github.com/rust-lang/rust/pull/33086).
1347 * [Implemented negation for wrapping numerals]
1348 (https://github.com/rust-lang/rust/pull/33067).
1349 * [Implement `Clone` for `binary_heap::IntoIter`]
1350 (https://github.com/rust-lang/rust/pull/33050).
1351 * [Implement `Display` and `Hash` for `std::num::Wrapping`]
1352 (https://github.com/rust-lang/rust/pull/33023).
1353 * [Add `Default` implementation for `&CStr`, `CString`]
1354 (https://github.com/rust-lang/rust/pull/32990).
1355 * [Implement `From<Vec<T>>` and `Into<Vec<T>>` for `VecDeque<T>`]
1356 (https://github.com/rust-lang/rust/pull/32866).
1357 * [Implement `Default` for `UnsafeCell`, `fmt::Error`, `Condvar`,
1359 (https://github.com/rust-lang/rust/pull/32785).
1363 * [Cargo.toml supports the `profile.*.panic` option]
1364 (https://github.com/rust-lang/cargo/pull/2687).
1365 This controls the runtime behavior of the `panic!` macro
1366 and can be either "unwind" (the default), or "abort".
1367 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
1368 * [Don't throw away errors with `-p` arguments]
1369 (https://github.com/rust-lang/cargo/pull/2723).
1370 * [Report status to stderr instead of stdout]
1371 (https://github.com/rust-lang/cargo/pull/2693).
1372 * [Build scripts are passed a `CARGO_MANIFEST_LINKS` environment
1373 variable that corresponds to the `links` field of the manifest]
1374 (https://github.com/rust-lang/cargo/pull/2710).
1375 * [Ban keywords from crate names]
1376 (https://github.com/rust-lang/cargo/pull/2707).
1377 * [Canonicalize `CARGO_HOME` on Windows]
1378 (https://github.com/rust-lang/cargo/pull/2604).
1379 * [Retry network requests]
1380 (https://github.com/rust-lang/cargo/pull/2396).
1381 By default they are retried twice, which can be customized with the
1382 `net.retry` value in `.cargo/config`.
1383 * [Don't print extra error info for failing subcommands]
1384 (https://github.com/rust-lang/cargo/pull/2674).
1385 * [Add `--force` flag to `cargo install`]
1386 (https://github.com/rust-lang/cargo/pull/2405).
1387 * [Don't use `flock` on NFS mounts]
1388 (https://github.com/rust-lang/cargo/pull/2623).
1389 * [Prefer building `cargo install` artifacts in temporary directories]
1390 (https://github.com/rust-lang/cargo/pull/2610).
1391 Makes it possible to install multiple crates in parallel.
1392 * [Add `cargo test --doc`]
1393 (https://github.com/rust-lang/cargo/pull/2578).
1394 * [Add `cargo --explain`]
1395 (https://github.com/rust-lang/cargo/pull/2551).
1396 * [Don't print warnings when `-q` is passed]
1397 (https://github.com/rust-lang/cargo/pull/2576).
1398 * [Add `cargo doc --lib` and `--bin`]
1399 (https://github.com/rust-lang/cargo/pull/2577).
1400 * [Don't require build script output to be UTF-8]
1401 (https://github.com/rust-lang/cargo/pull/2560).
1402 * [Correctly attempt multiple git usernames]
1403 (https://github.com/rust-lang/cargo/pull/2584).
1408 * [rustc memory usage was reduced by refactoring the context used for
1410 (https://github.com/rust-lang/rust/pull/33425).
1411 * [Speed up creation of `HashMap`s by caching the random keys used
1412 to initialize the hash state]
1413 (https://github.com/rust-lang/rust/pull/33318).
1414 * [The `find` implementation for `Chain` iterators is 2x faster]
1415 (https://github.com/rust-lang/rust/pull/33289).
1416 * [Trait selection optimizations speed up type checking by 15%]
1417 (https://github.com/rust-lang/rust/pull/33138).
1418 * [Efficient trie lookup for boolean Unicode properties]
1419 (https://github.com/rust-lang/rust/pull/33098).
1420 10x faster than the previous lookup tables.
1421 * [Special case `#[derive(Copy, Clone)]` to avoid bloat]
1422 (https://github.com/rust-lang/rust/pull/31414).
1427 * Many incremental improvements to documentation and rustdoc.
1428 * [rustdoc: List blanket trait impls]
1429 (https://github.com/rust-lang/rust/pull/33514).
1430 * [rustdoc: Clean up ABI rendering]
1431 (https://github.com/rust-lang/rust/pull/33151).
1432 * [Indexing with the wrong type produces a more informative error]
1433 (https://github.com/rust-lang/rust/pull/33401).
1434 * [Improve diagnostics for constants being used in irrefutable patterns]
1435 (https://github.com/rust-lang/rust/pull/33406).
1436 * [When many method candidates are in scope limit the suggestions to 10]
1437 (https://github.com/rust-lang/rust/pull/33338).
1438 * [Remove confusing suggestion when calling a `fn` type]
1439 (https://github.com/rust-lang/rust/pull/33325).
1440 * [Do not suggest changing `&mut self` to `&mut mut self`]
1441 (https://github.com/rust-lang/rust/pull/33319).
1446 * [Update i686-linux-android features to match Android ABI]
1447 (https://github.com/rust-lang/rust/pull/33651).
1448 * [Update aarch64-linux-android features to match Android ABI]
1449 (https://github.com/rust-lang/rust/pull/33500).
1450 * [`std` no longer prints backtraces on platforms where the running
1451 module must be loaded with `env::current_exe`, which can't be relied
1452 on](https://github.com/rust-lang/rust/pull/33554).
1453 * This release includes std binaries for the i586-unknown-linux-gnu,
1454 i686-unknown-linux-musl, and armv7-linux-androideabi targets. The
1455 i586 target is for old x86 hardware without SSE2, and the armv7
1456 target is for Android running on modern ARM architectures.
1457 * [The `rust-gdb` and `rust-lldb` scripts are distributed on all
1458 Unix platforms](https://github.com/rust-lang/rust/pull/32835).
1459 * [On Unix the runtime aborts by calling `libc::abort` instead of
1460 generating an illegal instruction]
1461 (https://github.com/rust-lang/rust/pull/31457).
1462 * [Rust is now bootstrapped from the previous release of Rust,
1463 instead of a snapshot from an arbitrary commit]
1464 (https://github.com/rust-lang/rust/pull/32942).
1469 * [`AtomicBool` is now bool-sized, not word-sized]
1470 (https://github.com/rust-lang/rust/pull/33579).
1471 * [`target_env` for Linux ARM targets is just `gnu`, not
1472 `gnueabihf`, `gnueabi`, etc]
1473 (https://github.com/rust-lang/rust/pull/33403).
1474 * [Consistently panic on overflow in `Duration::new`]
1475 (https://github.com/rust-lang/rust/pull/33072).
1476 * [Change `String::truncate` to panic less]
1477 (https://github.com/rust-lang/rust/pull/32977).
1478 * [Add `:block` to the follow set for `:ty` and `:path`]
1479 (https://github.com/rust-lang/rust/pull/32945).
1480 Affects how macros are parsed.
1481 * [Fix macro hygiene bug]
1482 (https://github.com/rust-lang/rust/pull/32923).
1483 * [Feature-gated attributes on macro-generated macro invocations are
1485 (https://github.com/rust-lang/rust/pull/32791).
1486 * [Suppress fallback and ambiguity errors during type inference]
1487 (https://github.com/rust-lang/rust/pull/32258).
1488 This caused some minor changes to type inference.
1491 Version 1.9.0 (2016-05-26)
1492 ==========================
1497 * The `#[deprecated]` attribute when applied to an API will generate
1498 warnings when used. The warnings may be suppressed with
1499 `#[allow(deprecated)]`. [RFC 1270].
1500 * [`fn` item types are zero sized, and each `fn` names a unique
1501 type][1.9fn]. This will break code that transmutes `fn`s, so calling
1502 `transmute` on a `fn` type will generate a warning for a few cycles,
1503 then will be converted to an error.
1504 * [Field and method resolution understand visibility, so private
1505 fields and methods cannot prevent the proper use of public fields
1506 and methods][1.9fv].
1507 * [The parser considers unicode codepoints in the
1508 `PATTERN_WHITE_SPACE` category to be whitespace][1.9ws].
1514 * [`std::panic::catch_unwind`][] (renamed from `recover`)
1515 * [`std::panic::resume_unwind`][] (renamed from `propagate`)
1516 * [`std::panic::AssertUnwindSafe`][] (renamed from `AssertRecoverSafe`)
1517 * [`std::panic::UnwindSafe`][] (renamed from `RecoverSafe`)
1518 * [`str::is_char_boundary`]
1519 * [`<*const T>::as_ref`]
1520 * [`<*mut T>::as_ref`]
1521 * [`<*mut T>::as_mut`]
1522 * [`AsciiExt::make_ascii_uppercase`]
1523 * [`AsciiExt::make_ascii_lowercase`]
1524 * [`char::decode_utf16`]
1525 * [`char::DecodeUtf16`]
1526 * [`char::DecodeUtf16Error`]
1527 * [`char::DecodeUtf16Error::unpaired_surrogate`]
1528 * [`BTreeSet::take`]
1529 * [`BTreeSet::replace`]
1532 * [`HashSet::replace`]
1534 * [`OsString::with_capacity`]
1535 * [`OsString::clear`]
1536 * [`OsString::capacity`]
1537 * [`OsString::reserve`]
1538 * [`OsString::reserve_exact`]
1539 * [`OsStr::is_empty`]
1541 * [`std::os::unix::thread`]
1544 * [`JoinHandleExt::as_pthread_t`]
1545 * [`JoinHandleExt::into_pthread_t`]
1546 * [`HashSet::hasher`]
1547 * [`HashMap::hasher`]
1548 * [`CommandExt::exec`]
1549 * [`File::try_clone`]
1550 * [`SocketAddr::set_ip`]
1551 * [`SocketAddr::set_port`]
1552 * [`SocketAddrV4::set_ip`]
1553 * [`SocketAddrV4::set_port`]
1554 * [`SocketAddrV6::set_ip`]
1555 * [`SocketAddrV6::set_port`]
1556 * [`SocketAddrV6::set_flowinfo`]
1557 * [`SocketAddrV6::set_scope_id`]
1558 * [`slice::copy_from_slice`]
1559 * [`ptr::read_volatile`]
1560 * [`ptr::write_volatile`]
1561 * [`OpenOptions::create_new`]
1562 * [`TcpStream::set_nodelay`]
1563 * [`TcpStream::nodelay`]
1564 * [`TcpStream::set_ttl`]
1565 * [`TcpStream::ttl`]
1566 * [`TcpStream::set_only_v6`]
1567 * [`TcpStream::only_v6`]
1568 * [`TcpStream::take_error`]
1569 * [`TcpStream::set_nonblocking`]
1570 * [`TcpListener::set_ttl`]
1571 * [`TcpListener::ttl`]
1572 * [`TcpListener::set_only_v6`]
1573 * [`TcpListener::only_v6`]
1574 * [`TcpListener::take_error`]
1575 * [`TcpListener::set_nonblocking`]
1576 * [`UdpSocket::set_broadcast`]
1577 * [`UdpSocket::broadcast`]
1578 * [`UdpSocket::set_multicast_loop_v4`]
1579 * [`UdpSocket::multicast_loop_v4`]
1580 * [`UdpSocket::set_multicast_ttl_v4`]
1581 * [`UdpSocket::multicast_ttl_v4`]
1582 * [`UdpSocket::set_multicast_loop_v6`]
1583 * [`UdpSocket::multicast_loop_v6`]
1584 * [`UdpSocket::set_multicast_ttl_v6`]
1585 * [`UdpSocket::multicast_ttl_v6`]
1586 * [`UdpSocket::set_ttl`]
1587 * [`UdpSocket::ttl`]
1588 * [`UdpSocket::set_only_v6`]
1589 * [`UdpSocket::only_v6`]
1590 * [`UdpSocket::join_multicast_v4`]
1591 * [`UdpSocket::join_multicast_v6`]
1592 * [`UdpSocket::leave_multicast_v4`]
1593 * [`UdpSocket::leave_multicast_v6`]
1594 * [`UdpSocket::take_error`]
1595 * [`UdpSocket::connect`]
1596 * [`UdpSocket::send`]
1597 * [`UdpSocket::recv`]
1598 * [`UdpSocket::set_nonblocking`]
1603 * [`std::sync::Once` is poisoned if its initialization function
1605 * [`cell::Ref` and `cell::RefMut` can contain unsized types][1.9cu].
1606 * [Most types implement `fmt::Debug`][1.9db].
1607 * [The default buffer size used by `BufReader` and `BufWriter` was
1608 reduced to 8K, from 64K][1.9bf]. This is in line with the buffer size
1609 used by other languages.
1610 * [`Instant`, `SystemTime` and `Duration` implement `+=` and `-=`.
1611 `Duration` additionally implements `*=` and `/=`][1.9ta].
1612 * [`Skip` is a `DoubleEndedIterator`][1.9sk].
1613 * [`From<[u8; 4]>` is implemented for `Ipv4Addr`][1.9fi].
1614 * [`Chain` implements `BufRead`][1.9ch].
1615 * [`HashMap`, `HashSet` and iterators are covariant][1.9hc].
1620 * [Cargo can now run concurrently][1.9cc].
1621 * [Top-level overrides allow specific revisions of crates to be
1622 overridden through the entire crate graph][1.9ct]. This is intended
1623 to make upgrades easier for large projects, by allowing crates to be
1624 forked temporarily until they've been upgraded and republished.
1625 * [Cargo exports a `CARGO_PKG_AUTHORS` environment variable][1.9cp].
1626 * [Cargo will pass the contents of the `RUSTFLAGS` variable to `rustc`
1627 on the commandline][1.9cf]. `rustc` arguments can also be specified
1628 in the `build.rustflags` configuration key.
1633 * [The time complexity of comparing variables for equivalence during type
1634 unification is reduced from _O_(_n_!) to _O_(_n_)][1.9tu]. This leads
1635 to major compilation time improvement in some scenarios.
1636 * [`ToString` is specialized for `str`, giving it the same performance
1637 as `to_owned`][1.9ts].
1638 * [Spawning processes with `Command::output` no longer creates extra
1640 * [`#[derive(PartialEq)]` and `#[derive(PartialOrd)]` emit less code
1641 for C-like enums][1.9cl].
1646 * [Passing the `--quiet` flag to a test runner will produce
1647 much-abbreviated output][1.9q].
1648 * The Rust Project now publishes std binaries for the
1649 `mips-unknown-linux-musl`, `mipsel-unknown-linux-musl`, and
1650 `i586-pc-windows-msvc` targets.
1655 * [`std::sync::Once` is poisoned if its initialization function
1657 * [It is illegal to define methods with the same name in overlapping
1658 inherent `impl` blocks][1.9sn].
1659 * [`fn` item types are zero sized, and each `fn` names a unique
1660 type][1.9fn]. This will break code that transmutes `fn`s, so calling
1661 `transmute` on a `fn` type will generate a warning for a few cycles,
1662 then will be converted to an error.
1663 * [Improvements to const evaluation may trigger new errors when integer
1664 literals are out of range][1.9ce].
1667 [1.9bf]: https://github.com/rust-lang/rust/pull/32695
1668 [1.9cc]: https://github.com/rust-lang/cargo/pull/2486
1669 [1.9ce]: https://github.com/rust-lang/rust/pull/30587
1670 [1.9cf]: https://github.com/rust-lang/cargo/pull/2241
1671 [1.9ch]: https://github.com/rust-lang/rust/pull/32541
1672 [1.9cl]: https://github.com/rust-lang/rust/pull/31977
1673 [1.9cp]: https://github.com/rust-lang/cargo/pull/2465
1674 [1.9ct]: https://github.com/rust-lang/cargo/pull/2385
1675 [1.9cu]: https://github.com/rust-lang/rust/pull/32652
1676 [1.9db]: https://github.com/rust-lang/rust/pull/32054
1677 [1.9fi]: https://github.com/rust-lang/rust/pull/32050
1678 [1.9fn]: https://github.com/rust-lang/rust/pull/31710
1679 [1.9fv]: https://github.com/rust-lang/rust/pull/31938
1680 [1.9hc]: https://github.com/rust-lang/rust/pull/32635
1681 [1.9o]: https://github.com/rust-lang/rust/pull/32325
1682 [1.9q]: https://github.com/rust-lang/rust/pull/31887
1683 [1.9sk]: https://github.com/rust-lang/rust/pull/31700
1684 [1.9sn]: https://github.com/rust-lang/rust/pull/31925
1685 [1.9sp]: https://github.com/rust-lang/rust/pull/31618
1686 [1.9ta]: https://github.com/rust-lang/rust/pull/32448
1687 [1.9ts]: https://github.com/rust-lang/rust/pull/32586
1688 [1.9tu]: https://github.com/rust-lang/rust/pull/32062
1689 [1.9ws]: https://github.com/rust-lang/rust/pull/29734
1690 [RFC 1270]: https://github.com/rust-lang/rfcs/blob/master/text/1270-deprecation.md
1691 [`<*const T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
1692 [`<*mut T>::as_mut`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_mut
1693 [`<*mut T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
1694 [`slice::copy_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.copy_from_slice
1695 [`AsciiExt::make_ascii_lowercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_lowercase
1696 [`AsciiExt::make_ascii_uppercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_uppercase
1697 [`BTreeSet::get`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.get
1698 [`BTreeSet::replace`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.replace
1699 [`BTreeSet::take`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.take
1700 [`CommandExt::exec`]: http://doc.rust-lang.org/nightly/std/os/unix/process/trait.CommandExt.html#tymethod.exec
1701 [`File::try_clone`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html#method.try_clone
1702 [`HashMap::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.hasher
1703 [`HashSet::get`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.get
1704 [`HashSet::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.hasher
1705 [`HashSet::replace`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.replace
1706 [`HashSet::take`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.take
1707 [`JoinHandleExt::as_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.as_pthread_t
1708 [`JoinHandleExt::into_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.into_pthread_t
1709 [`JoinHandleExt`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html
1710 [`OpenOptions::create_new`]: http://doc.rust-lang.org/nightly/std/fs/struct.OpenOptions.html#method.create_new
1711 [`OsStr::is_empty`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.is_empty
1712 [`OsStr::len`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.len
1713 [`OsString::capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.capacity
1714 [`OsString::clear`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.clear
1715 [`OsString::reserve_exact`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve_exact
1716 [`OsString::reserve`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve
1717 [`OsString::with_capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.with_capacity
1718 [`RawPthread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/type.RawPthread.html
1719 [`SocketAddr::set_ip`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_ip
1720 [`SocketAddr::set_port`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_port
1721 [`SocketAddrV4::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_ip
1722 [`SocketAddrV4::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_port
1723 [`SocketAddrV6::set_flowinfo`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_flowinfo
1724 [`SocketAddrV6::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_ip
1725 [`SocketAddrV6::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_port
1726 [`SocketAddrV6::set_scope_id`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_scope_id
1727 [`TcpListener::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
1728 [`TcpListener::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
1729 [`TcpListener::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
1730 [`TcpListener::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
1731 [`TcpListener::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
1732 [`TcpListener::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
1733 [`TcpStream::nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.nodelay
1734 [`TcpStream::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
1735 [`TcpStream::set_nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nodelay
1736 [`TcpStream::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
1737 [`TcpStream::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
1738 [`TcpStream::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
1739 [`TcpStream::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
1740 [`TcpStream::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
1741 [`UdpSocket::broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.broadcast
1742 [`UdpSocket::connect`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.connect
1743 [`UdpSocket::join_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v4
1744 [`UdpSocket::join_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v6
1745 [`UdpSocket::leave_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v4
1746 [`UdpSocket::leave_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v6
1747 [`UdpSocket::multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v4
1748 [`UdpSocket::multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v6
1749 [`UdpSocket::multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v4
1750 [`UdpSocket::multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v6
1751 [`UdpSocket::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.only_v6
1752 [`UdpSocket::recv`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.recv
1753 [`UdpSocket::send`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.send
1754 [`UdpSocket::set_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_broadcast
1755 [`UdpSocket::set_multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v4
1756 [`UdpSocket::set_multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v6
1757 [`UdpSocket::set_multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v4
1758 [`UdpSocket::set_multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v6
1759 [`UdpSocket::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_nonblocking
1760 [`UdpSocket::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_only_v6
1761 [`UdpSocket::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_ttl
1762 [`UdpSocket::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.take_error
1763 [`UdpSocket::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.ttl
1764 [`char::DecodeUtf16Error::unpaired_surrogate`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html#method.unpaired_surrogate
1765 [`char::DecodeUtf16Error`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html
1766 [`char::DecodeUtf16`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16.html
1767 [`char::decode_utf16`]: http://doc.rust-lang.org/nightly/std/char/fn.decode_utf16.html
1768 [`ptr::read_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.read_volatile.html
1769 [`ptr::write_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.write_volatile.html
1770 [`std::os::unix::thread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/index.html
1771 [`std::panic::AssertUnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/struct.AssertUnwindSafe.html
1772 [`std::panic::UnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/trait.UnwindSafe.html
1773 [`std::panic::catch_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.catch_unwind.html
1774 [`std::panic::resume_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.resume_unwind.html
1775 [`std::panic`]: http://doc.rust-lang.org/nightly/std/panic/index.html
1776 [`str::is_char_boundary`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.is_char_boundary
1779 Version 1.8.0 (2016-04-14)
1780 ==========================
1785 * Rust supports overloading of compound assignment statements like
1786 `+=` by implementing the [`AddAssign`], [`SubAssign`],
1787 [`MulAssign`], [`DivAssign`], [`RemAssign`], [`BitAndAssign`],
1788 [`BitOrAssign`], [`BitXorAssign`], [`ShlAssign`], or [`ShrAssign`]
1790 * Empty structs can be defined with braces, as in `struct Foo { }`, in
1791 addition to the non-braced form, `struct Foo;`. [RFC 218].
1797 * [`str::encode_utf16`][] (renamed from `utf16_units`)
1798 * [`str::EncodeUtf16`][] (renamed from `Utf16Units`)
1801 * [`ptr::drop_in_place`]
1803 * [`time::SystemTime`]
1805 * [`Instant::duration_since`][] (renamed from `duration_from_earlier`)
1806 * [`Instant::elapsed`]
1807 * [`SystemTime::now`]
1808 * [`SystemTime::duration_since`][] (renamed from `duration_from_earlier`)
1809 * [`SystemTime::elapsed`]
1810 * Various `Add`/`Sub` impls for `Time` and `SystemTime`
1811 * [`SystemTimeError`]
1812 * [`SystemTimeError::duration`]
1813 * Various impls for `SystemTimeError`
1815 * [`AddAssign`], [`SubAssign`], [`MulAssign`], [`DivAssign`],
1816 [`RemAssign`], [`BitAndAssign`], [`BitOrAssign`],
1817 [`BitXorAssign`], [`ShlAssign`], [`ShrAssign`].
1818 * [The `write!` and `writeln!` macros correctly emit errors if any of
1819 their arguments can't be formatted][1.8w].
1820 * [Various I/O functions support large files on 32-bit Linux][1.8l].
1821 * [The Unix-specific `raw` modules, which contain a number of
1822 redefined C types are deprecated][1.8r], including `os::raw::unix`,
1823 `os::raw::macos`, and `os::raw::linux`. These modules defined types
1824 such as `ino_t` and `dev_t`. The inconsistency of these definitions
1825 across platforms was making it difficult to implement `std`
1826 correctly. Those that need these definitions should use the `libc`
1828 * The Unix-specific `MetadataExt` traits, including
1829 `os::unix::fs::MetadataExt`, which expose values such as inode
1830 numbers [no longer return platform-specific types][1.8r], but
1831 instead return widened integers. [RFC 1415].
1832 * [`btree_set::{IntoIter, Iter, Range}` are covariant][1.8cv].
1833 * [Atomic loads and stores are not volatile][1.8a].
1834 * [All types in `sync::mpsc` implement `fmt::Debug`][1.8mp].
1839 * [Inlining hash functions lead to a 3% compile-time improvement in
1840 some workloads][1.8h].
1841 * When using jemalloc, its symbols are [unprefixed so that it
1842 overrides the libc malloc implementation][1.8h]. This means that for
1843 rustc, LLVM is now using jemalloc, which results in a 6%
1844 compile-time improvement on a specific workload.
1845 * [Avoid quadratic growth in function size due to cleanups][1.8cu].
1850 * [32-bit MSVC builds finally implement unwinding][1.8ms].
1851 i686-pc-windows-msvc is now considered a tier-1 platform.
1852 * [The `--print targets` flag prints a list of supported targets][1.8t].
1853 * [The `--print cfg` flag prints the `cfg`s defined for the current
1855 * [`rustc` can be built with an new Cargo-based build system, written
1856 in Rust][1.8b]. It will eventually replace Rust's Makefile-based
1857 build system. To enable it configure with `configure --rustbuild`.
1858 * [Errors for non-exhaustive `match` patterns now list up to 3 missing
1859 variants while also indicating the total number of missing variants
1860 if more than 3][1.8m].
1861 * [Executable stacks are disabled on Linux and BSD][1.8nx].
1862 * The Rust Project now publishes binary releases of the standard
1863 library for a number of tier-2 targets:
1864 `armv7-unknown-linux-gnueabihf`, `powerpc-unknown-linux-gnu`,
1865 `powerpc64-unknown-linux-gnu`, `powerpc64le-unknown-linux-gnu`
1866 `x86_64-rumprun-netbsd`. These can be installed with
1867 tools such as [multirust][1.8mr].
1872 * [`cargo init` creates a new Cargo project in the current
1873 directory][1.8ci]. It is otherwise like `cargo new`.
1874 * [Cargo has configuration keys for `-v` and
1875 `--color`][1.8cc]. `verbose` and `color`, respectively, go in the
1876 `[term]` section of `.cargo/config`.
1877 * [Configuration keys that evaluate to strings or integers can be set
1878 via environment variables][1.8ce]. For example the `build.jobs` key
1879 can be set via `CARGO_BUILD_JOBS`. Environment variables take
1880 precedence over config files.
1881 * [Target-specific dependencies support Rust `cfg` syntax for
1882 describing targets][1.8cfg] so that dependencies for multiple
1883 targets can be specified together. [RFC 1361].
1884 * [The environment variables `CARGO_TARGET_ROOT`, `RUSTC`, and
1885 `RUSTDOC` take precedence over the `build.target-dir`,
1886 `build.rustc`, and `build.rustdoc` configuration values][1.8cv].
1887 * [The child process tree is killed on Windows when Cargo is
1889 * [The `build.target` configuration value sets the target platform,
1890 like `--target`][1.8ct].
1895 * [Unstable compiler flags have been further restricted][1.8u]. Since
1896 1.0 `-Z` flags have been considered unstable, and other flags that
1897 were considered unstable additionally required passing `-Z
1898 unstable-options` to access. Unlike unstable language and library
1899 features though, these options have been accessible on the stable
1900 release channel. Going forward, *new unstable flags will not be
1901 available on the stable release channel*, and old unstable flags
1902 will warn about their usage. In the future, all unstable flags will
1903 be unavailable on the stable release channel.
1904 * [It is no longer possible to `match` on empty enum variants using
1905 the `Variant(..)` syntax][1.8v]. This has been a warning since 1.6.
1906 * The Unix-specific `MetadataExt` traits, including
1907 `os::unix::fs::MetadataExt`, which expose values such as inode
1908 numbers [no longer return platform-specific types][1.8r], but
1909 instead return widened integers. [RFC 1415].
1910 * [Modules sourced from the filesystem cannot appear within arbitrary
1911 blocks, but only within other modules][1.8mf].
1912 * [`--cfg` compiler flags are parsed strictly as identifiers][1.8c].
1913 * On Unix, [stack overflow triggers a runtime abort instead of a
1915 * [`Command::spawn` and its equivalents return an error if any of
1916 its command-line arguments contain interior `NUL`s][1.8n].
1917 * [Tuple and unit enum variants from other crates are in the type
1919 * [On Windows `rustc` emits `.lib` files for the `staticlib` library
1920 type instead of `.a` files][1.8st]. Additionally, for the MSVC
1921 toolchain, `rustc` emits import libraries named `foo.dll.lib`
1922 instead of `foo.lib`.
1925 [1.8a]: https://github.com/rust-lang/rust/pull/30962
1926 [1.8b]: https://github.com/rust-lang/rust/pull/31123
1927 [1.8c]: https://github.com/rust-lang/rust/pull/31530
1928 [1.8cc]: https://github.com/rust-lang/cargo/pull/2397
1929 [1.8ce]: https://github.com/rust-lang/cargo/pull/2398
1930 [1.8cf]: https://github.com/rust-lang/rust/pull/31278
1931 [1.8cfg]: https://github.com/rust-lang/cargo/pull/2328
1932 [1.8ci]: https://github.com/rust-lang/cargo/pull/2081
1933 [1.8ck]: https://github.com/rust-lang/cargo/pull/2370
1934 [1.8ct]: https://github.com/rust-lang/cargo/pull/2335
1935 [1.8cu]: https://github.com/rust-lang/rust/pull/31390
1936 [1.8cv]: https://github.com/rust-lang/cargo/issues/2365
1937 [1.8cv]: https://github.com/rust-lang/rust/pull/30998
1938 [1.8h]: https://github.com/rust-lang/rust/pull/31460
1939 [1.8l]: https://github.com/rust-lang/rust/pull/31668
1940 [1.8m]: https://github.com/rust-lang/rust/pull/31020
1941 [1.8mf]: https://github.com/rust-lang/rust/pull/31534
1942 [1.8mp]: https://github.com/rust-lang/rust/pull/30894
1943 [1.8mr]: https://users.rust-lang.org/t/multirust-0-8-with-cross-std-installation/4901
1944 [1.8ms]: https://github.com/rust-lang/rust/pull/30448
1945 [1.8n]: https://github.com/rust-lang/rust/pull/31056
1946 [1.8nx]: https://github.com/rust-lang/rust/pull/30859
1947 [1.8r]: https://github.com/rust-lang/rust/pull/31551
1948 [1.8so]: https://github.com/rust-lang/rust/pull/31333
1949 [1.8st]: https://github.com/rust-lang/rust/pull/29520
1950 [1.8t]: https://github.com/rust-lang/rust/pull/31358
1951 [1.8tn]: https://github.com/rust-lang/rust/pull/30882
1952 [1.8u]: https://github.com/rust-lang/rust/pull/31793
1953 [1.8v]: https://github.com/rust-lang/rust/pull/31757
1954 [1.8w]: https://github.com/rust-lang/rust/pull/31904
1955 [RFC 1361]: https://github.com/rust-lang/rfcs/blob/master/text/1361-cargo-cfg-dependencies.md
1956 [RFC 1415]: https://github.com/rust-lang/rfcs/blob/master/text/1415-trim-std-os.md
1957 [RFC 218]: https://github.com/rust-lang/rfcs/blob/master/text/0218-empty-struct-with-braces.md
1958 [RFC 953]: https://github.com/rust-lang/rfcs/blob/master/text/0953-op-assign.md
1959 [`AddAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.AddAssign.html
1960 [`BitAndAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitAndAssign.html
1961 [`BitOrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitOrAssign.html
1962 [`BitXorAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitXorAssign.html
1963 [`DivAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.DivAssign.html
1964 [`Instant::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.duration_since
1965 [`Instant::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.elapsed
1966 [`Instant::now`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.now
1967 [`MulAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.MulAssign.html
1968 [`Ref::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.Ref.html#method.map
1969 [`RefMut::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.RefMut.html#method.map
1970 [`RemAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.RemAssign.html
1971 [`ShlAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShlAssign.html
1972 [`ShrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShrAssign.html
1973 [`SubAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.SubAssign.html
1974 [`SystemTime::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.duration_since
1975 [`SystemTime::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.elapsed
1976 [`SystemTime::now`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.now
1977 [`SystemTimeError::duration`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html#method.duration
1978 [`SystemTimeError`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html
1979 [`UNIX_EPOCH`]: http://doc.rust-lang.org/nightly/std/time/constant.UNIX_EPOCH.html
1980 [`ptr::drop_in_place`]: http://doc.rust-lang.org/nightly/std/ptr/fn.drop_in_place.html
1981 [`str::EncodeUtf16`]: http://doc.rust-lang.org/nightly/std/str/struct.EncodeUtf16.html
1982 [`str::encode_utf16`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.encode_utf16
1983 [`time::Instant`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html
1984 [`time::SystemTime`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html
1987 Version 1.7.0 (2016-03-03)
1988 ==========================
1995 * [`Path::strip_prefix`][] (renamed from relative_from)
1996 * [`path::StripPrefixError`][] (new error type returned from strip_prefix)
1998 * [`Ipv4Addr::is_loopback`]
1999 * [`Ipv4Addr::is_private`]
2000 * [`Ipv4Addr::is_link_local`]
2001 * [`Ipv4Addr::is_multicast`]
2002 * [`Ipv4Addr::is_broadcast`]
2003 * [`Ipv4Addr::is_documentation`]
2005 * [`Ipv6Addr::is_unspecified`]
2006 * [`Ipv6Addr::is_loopback`]
2007 * [`Ipv6Addr::is_multicast`]
2010 * [`Vec::as_mut_slice`]
2012 * [`String::as_str`]
2013 * [`String::as_mut_str`]
2015 * `<[T]>::`[`clone_from_slice`], which now requires the two slices to
2017 * `<[T]>::`[`sort_by_key`]
2018 * checked, saturated, and overflowing operations
2019 * [`i32::checked_rem`], [`i32::checked_neg`], [`i32::checked_shl`], [`i32::checked_shr`]
2020 * [`i32::saturating_mul`]
2021 * [`i32::overflowing_add`], [`i32::overflowing_sub`], [`i32::overflowing_mul`], [`i32::overflowing_div`]
2022 * [`i32::overflowing_rem`], [`i32::overflowing_neg`], [`i32::overflowing_shl`], [`i32::overflowing_shr`]
2023 * [`u32::checked_rem`], [`u32::checked_neg`], [`u32::checked_shl`], [`u32::checked_shl`]
2024 * [`u32::saturating_mul`]
2025 * [`u32::overflowing_add`], [`u32::overflowing_sub`], [`u32::overflowing_mul`], [`u32::overflowing_div`]
2026 * [`u32::overflowing_rem`], [`u32::overflowing_neg`], [`u32::overflowing_shl`], [`u32::overflowing_shr`]
2027 * and checked, saturated, and overflowing operations for other primitive types
2029 * [`ffi::IntoStringError`]
2030 * [`CString::into_string`]
2031 * [`CString::into_bytes`]
2032 * [`CString::into_bytes_with_nul`]
2033 * `From<CString> for Vec<u8>`
2035 * [`IntoStringError::into_cstring`]
2036 * [`IntoStringError::utf8_error`]
2037 * `Error for IntoStringError`
2039 * [`std::hash::BuildHasher`]
2040 * [`BuildHasher::Hasher`]
2041 * [`BuildHasher::build_hasher`]
2042 * [`std::hash::BuildHasherDefault`]
2043 * [`HashMap::with_hasher`]
2044 * [`HashMap::with_capacity_and_hasher`]
2045 * [`HashSet::with_hasher`]
2046 * [`HashSet::with_capacity_and_hasher`]
2047 * [`std::collections::hash_map::RandomState`]
2048 * [`RandomState::new`]
2049 * [Validating UTF-8 is faster by a factor of between 7 and 14x for
2050 ASCII input][1.7utf8]. This means that creating `String`s and `str`s
2051 from bytes is faster.
2052 * [The performance of `LineWriter` (and thus `io::stdout`) was
2053 improved by using `memchr` to search for newlines][1.7m].
2054 * [`f32::to_degrees` and `f32::to_radians` are stable][1.7f]. The
2055 `f64` variants were stabilized previously.
2056 * [`BTreeMap` was rewritten to use less memory and improve the performance
2057 of insertion and iteration, the latter by as much as 5x][1.7bm].
2058 * [`BTreeSet` and its iterators, `Iter`, `IntoIter`, and `Range` are
2059 covariant over their contained type][1.7bt].
2060 * [`LinkedList` and its iterators, `Iter` and `IntoIter` are covariant
2061 over their contained type][1.7ll].
2062 * [`str::replace` now accepts a `Pattern`][1.7rp], like other string
2064 * [`Any` is implemented for unsized types][1.7a].
2065 * [`Hash` is implemented for `Duration`][1.7h].
2070 * [When running tests with `--test`, rustdoc will pass `--cfg`
2071 arguments to the compiler][1.7dt].
2072 * [The compiler is built with RPATH information by default][1.7rpa].
2073 This means that it will be possible to run `rustc` when installed in
2074 unusual configurations without configuring the dynamic linker search
2076 * [`rustc` passes `--enable-new-dtags` to GNU ld][1.7dta]. This makes
2077 any RPATH entries (emitted with `-C rpath`) *not* take precedence
2078 over `LD_LIBRARY_PATH`.
2083 * [`cargo rustc` accepts a `--profile` flag that runs `rustc` under
2084 any of the compilation profiles, 'dev', 'bench', or 'test'][1.7cp].
2085 * [The `rerun-if-changed` build script directive no longer causes the
2086 build script to incorrectly run twice in certain scenarios][1.7rr].
2091 * Soundness fixes to the interactions between associated types and
2092 lifetimes, specified in [RFC 1214], [now generate errors][1.7sf] for
2093 code that violates the new rules. This is a significant change that
2094 is known to break existing code, so it has emitted warnings for the
2095 new error cases since 1.4 to give crate authors time to adapt. The
2096 details of what is changing are subtle; read the RFC for more.
2097 * [Several bugs in the compiler's visibility calculations were
2098 fixed][1.7v]. Since this was found to break significant amounts of
2099 code, the new errors will be emitted as warnings for several release
2100 cycles, under the `private_in_public` lint.
2101 * Defaulted type parameters were accidentally accepted in positions
2102 that were not intended. In this release, [defaulted type parameters
2103 appearing outside of type definitions will generate a
2104 warning][1.7d], which will become an error in future releases.
2105 * [Parsing "." as a float results in an error instead of 0][1.7p].
2106 That is, `".".parse::<f32>()` returns `Err`, not `Ok(0.0)`.
2107 * [Borrows of closure parameters may not outlive the closure][1.7bc].
2109 [1.7a]: https://github.com/rust-lang/rust/pull/30928
2110 [1.7bc]: https://github.com/rust-lang/rust/pull/30341
2111 [1.7bm]: https://github.com/rust-lang/rust/pull/30426
2112 [1.7bt]: https://github.com/rust-lang/rust/pull/30998
2113 [1.7cp]: https://github.com/rust-lang/cargo/pull/2224
2114 [1.7d]: https://github.com/rust-lang/rust/pull/30724
2115 [1.7dt]: https://github.com/rust-lang/rust/pull/30372
2116 [1.7dta]: https://github.com/rust-lang/rust/pull/30394
2117 [1.7f]: https://github.com/rust-lang/rust/pull/30672
2118 [1.7h]: https://github.com/rust-lang/rust/pull/30818
2119 [1.7ll]: https://github.com/rust-lang/rust/pull/30663
2120 [1.7m]: https://github.com/rust-lang/rust/pull/30381
2121 [1.7p]: https://github.com/rust-lang/rust/pull/30681
2122 [1.7rp]: https://github.com/rust-lang/rust/pull/29498
2123 [1.7rpa]: https://github.com/rust-lang/rust/pull/30353
2124 [1.7rr]: https://github.com/rust-lang/cargo/pull/2279
2125 [1.7sf]: https://github.com/rust-lang/rust/pull/30389
2126 [1.7utf8]: https://github.com/rust-lang/rust/pull/30740
2127 [1.7v]: https://github.com/rust-lang/rust/pull/29973
2128 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
2129 [`BuildHasher::Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
2130 [`BuildHasher::build_hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html#tymethod.build_hasher
2131 [`CString::into_bytes_with_nul`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes_with_nul
2132 [`CString::into_bytes`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes
2133 [`CString::into_string`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_string
2134 [`HashMap::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_capacity_and_hasher
2135 [`HashMap::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_hasher
2136 [`HashSet::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_capacity_and_hasher
2137 [`HashSet::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_hasher
2138 [`IntoStringError::into_cstring`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.into_cstring
2139 [`IntoStringError::utf8_error`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.utf8_error
2140 [`Ipv4Addr::is_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_broadcast
2141 [`Ipv4Addr::is_documentation`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_documentation
2142 [`Ipv4Addr::is_link_local`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_link_local
2143 [`Ipv4Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_loopback
2144 [`Ipv4Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_multicast
2145 [`Ipv4Addr::is_private`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_private
2146 [`Ipv6Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_loopback
2147 [`Ipv6Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_multicast
2148 [`Ipv6Addr::is_unspecified`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_unspecified
2149 [`Path::strip_prefix`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.strip_prefix
2150 [`RandomState::new`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html#method.new
2151 [`String::as_mut_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_mut_str
2152 [`String::as_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_str
2153 [`Vec::as_mut_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_mut_slice
2154 [`Vec::as_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_slice
2155 [`clone_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.clone_from_slice
2156 [`ffi::IntoStringError`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html
2157 [`i32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_neg
2158 [`i32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_rem
2159 [`i32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shl
2160 [`i32::checked_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shr
2161 [`i32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_add
2162 [`i32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_div
2163 [`i32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_mul
2164 [`i32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_neg
2165 [`i32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_rem
2166 [`i32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shl
2167 [`i32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shr
2168 [`i32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_sub
2169 [`i32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.saturating_mul
2170 [`path::StripPrefixError`]: http://doc.rust-lang.org/nightly/std/path/struct.StripPrefixError.html
2171 [`sort_by_key`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.sort_by_key
2172 [`std::collections::hash_map::RandomState`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html
2173 [`std::hash::BuildHasherDefault`]: http://doc.rust-lang.org/nightly/std/hash/struct.BuildHasherDefault.html
2174 [`std::hash::BuildHasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html
2175 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
2176 [`u32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_rem
2177 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
2178 [`u32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_shl
2179 [`u32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_add
2180 [`u32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_div
2181 [`u32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_mul
2182 [`u32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_neg
2183 [`u32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_rem
2184 [`u32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shl
2185 [`u32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shr
2186 [`u32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_sub
2187 [`u32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.saturating_mul
2190 Version 1.6.0 (2016-01-21)
2191 ==========================
2196 * The `#![no_std]` attribute causes a crate to not be linked to the
2197 standard library, but only the [core library][1.6co], as described
2198 in [RFC 1184]. The core library defines common types and traits but
2199 has no platform dependencies whatsoever, and is the basis for Rust
2200 software in environments that cannot support a full port of the
2201 standard library, such as operating systems. Most of the core
2202 library is now stable.
2208 [`Read::read_exact`],
2209 [`ErrorKind::UnexpectedEof`][] (renamed from `UnexpectedEOF`),
2210 [`fs::DirBuilder`], [`fs::DirBuilder::new`],
2211 [`fs::DirBuilder::recursive`], [`fs::DirBuilder::create`],
2212 [`os::unix::fs::DirBuilderExt`],
2213 [`os::unix::fs::DirBuilderExt::mode`], [`vec::Drain`],
2214 [`vec::Vec::drain`], [`string::Drain`], [`string::String::drain`],
2215 [`vec_deque::Drain`], [`vec_deque::VecDeque::drain`],
2216 [`collections::hash_map::Drain`],
2217 [`collections::hash_map::HashMap::drain`],
2218 [`collections::hash_set::Drain`],
2219 [`collections::hash_set::HashSet::drain`],
2220 [`collections::binary_heap::Drain`],
2221 [`collections::binary_heap::BinaryHeap::drain`],
2222 [`Vec::extend_from_slice`][] (renamed from `push_all`),
2223 [`Mutex::get_mut`], [`Mutex::into_inner`], [`RwLock::get_mut`],
2224 [`RwLock::into_inner`],
2225 [`Iterator::min_by_key`][] (renamed from `min_by`),
2226 [`Iterator::max_by_key`][] (renamed from `max_by`).
2227 * The [core library][1.6co] is stable, as are most of its APIs.
2228 * [The `assert_eq!` macro supports arguments that don't implement
2229 `Sized`][1.6ae], such as arrays. In this way it behaves more like
2231 * Several timer functions that take duration in milliseconds [are
2232 deprecated in favor of those that take `Duration`][1.6ms]. These
2233 include `Condvar::wait_timeout_ms`, `thread::sleep_ms`, and
2234 `thread::park_timeout_ms`.
2235 * The algorithm by which `Vec` reserves additional elements was
2236 [tweaked to not allocate excessive space][1.6a] while still growing
2238 * `From` conversions are [implemented from integers to floats][1.6f]
2239 in cases where the conversion is lossless. Thus they are not
2240 implemented for 32-bit ints to `f32`, nor for 64-bit ints to `f32`
2241 or `f64`. They are also not implemented for `isize` and `usize`
2242 because the implementations would be platform-specific. `From` is
2243 also implemented from `f32` to `f64`.
2244 * `From<&Path>` and `From<PathBuf>` are implemented for `Cow<Path>`.
2245 * `From<T>` is implemented for `Box<T>`, `Rc<T>` and `Arc<T>`.
2246 * `IntoIterator` is implemented for `&PathBuf` and `&Path`.
2247 * [`BinaryHeap` was refactored][1.6bh] for modest performance
2249 * Sorting slices that are already sorted [is 50% faster in some
2255 * Cargo will look in `$CARGO_HOME/bin` for subcommands [by default][1.6c].
2256 * Cargo build scripts can specify their dependencies by emitting the
2257 [`rerun-if-changed`][1.6rr] key.
2258 * crates.io will reject publication of crates with dependencies that
2259 have a wildcard version constraint. Crates with wildcard
2260 dependencies were seen to cause a variety of problems, as described
2261 in [RFC 1241]. Since 1.5 publication of such crates has emitted a
2263 * `cargo clean` [accepts a `--release` flag][1.6cc] to clean the
2264 release folder. A variety of artifacts that Cargo failed to clean
2265 are now correctly deleted.
2270 * The `unreachable_code` lint [warns when a function call's argument
2272 * The parser indicates [failures that may be caused by
2273 confusingly-similar Unicode characters][1.6uc]
2274 * Certain macro errors [are reported at definition time][1.6m], not
2280 * The compiler no longer makes use of the [`RUST_PATH`][1.6rp]
2281 environment variable when locating crates. This was a pre-cargo
2282 feature for integrating with the package manager that was
2283 accidentally never removed.
2284 * [A number of bugs were fixed in the privacy checker][1.6p] that
2285 could cause previously-accepted code to break.
2286 * [Modules and unit/tuple structs may not share the same name][1.6ts].
2287 * [Bugs in pattern matching unit structs were fixed][1.6us]. The tuple
2288 struct pattern syntax (`Foo(..)`) can no longer be used to match
2289 unit structs. This is a warning now, but will become an error in
2290 future releases. Patterns that share the same name as a const are
2292 * A bug was fixed that causes [rustc not to apply default type
2293 parameters][1.6xc] when resolving certain method implementations of
2294 traits defined in other crates.
2296 [1.6a]: https://github.com/rust-lang/rust/pull/29454
2297 [1.6ae]: https://github.com/rust-lang/rust/pull/29770
2298 [1.6bh]: https://github.com/rust-lang/rust/pull/29811
2299 [1.6c]: https://github.com/rust-lang/cargo/pull/2192
2300 [1.6cc]: https://github.com/rust-lang/cargo/pull/2131
2301 [1.6co]: http://doc.rust-lang.org/beta/core/index.html
2302 [1.6dv]: https://github.com/rust-lang/rust/pull/30000
2303 [1.6f]: https://github.com/rust-lang/rust/pull/29129
2304 [1.6m]: https://github.com/rust-lang/rust/pull/29828
2305 [1.6ms]: https://github.com/rust-lang/rust/pull/29604
2306 [1.6p]: https://github.com/rust-lang/rust/pull/29726
2307 [1.6rp]: https://github.com/rust-lang/rust/pull/30034
2308 [1.6rr]: https://github.com/rust-lang/cargo/pull/2134
2309 [1.6s]: https://github.com/rust-lang/rust/pull/29675
2310 [1.6ts]: https://github.com/rust-lang/rust/issues/21546
2311 [1.6uc]: https://github.com/rust-lang/rust/pull/29837
2312 [1.6us]: https://github.com/rust-lang/rust/pull/29383
2313 [1.6xc]: https://github.com/rust-lang/rust/issues/30123
2314 [RFC 1184]: https://github.com/rust-lang/rfcs/blob/master/text/1184-stabilize-no_std.md
2315 [RFC 1241]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
2316 [`ErrorKind::UnexpectedEof`]: http://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html#variant.UnexpectedEof
2317 [`Iterator::max_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.max_by_key
2318 [`Iterator::min_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.min_by_key
2319 [`Mutex::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.get_mut
2320 [`Mutex::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.into_inner
2321 [`Read::read_exact`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_exact
2322 [`RwLock::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.get_mut
2323 [`RwLock::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.into_inner
2324 [`Vec::extend_from_slice`]: http://doc.rust-lang.org/nightly/collections/vec/struct.Vec.html#method.extend_from_slice
2325 [`collections::binary_heap::BinaryHeap::drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.BinaryHeap.html#method.drain
2326 [`collections::binary_heap::Drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.Drain.html
2327 [`collections::hash_map::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.Drain.html
2328 [`collections::hash_map::HashMap::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.HashMap.html#method.drain
2329 [`collections::hash_set::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.Drain.html
2330 [`collections::hash_set::HashSet::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.HashSet.html#method.drain
2331 [`fs::DirBuilder::create`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.create
2332 [`fs::DirBuilder::new`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.new
2333 [`fs::DirBuilder::recursive`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.recursive
2334 [`fs::DirBuilder`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html
2335 [`os::unix::fs::DirBuilderExt::mode`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html#tymethod.mode
2336 [`os::unix::fs::DirBuilderExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html
2337 [`string::Drain`]: http://doc.rust-lang.org/nightly/std/string/struct.Drain.html
2338 [`string::String::drain`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.drain
2339 [`vec::Drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Drain.html
2340 [`vec::Vec::drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.drain
2341 [`vec_deque::Drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.Drain.html
2342 [`vec_deque::VecDeque::drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.VecDeque.html#method.drain
2345 Version 1.5.0 (2015-12-10)
2346 ==========================
2348 * ~700 changes, numerous bugfixes
2354 [`BinaryHeap::from`], [`BinaryHeap::into_sorted_vec`],
2355 [`BinaryHeap::into_vec`], [`Condvar::wait_timeout`],
2356 [`FileTypeExt::is_block_device`], [`FileTypeExt::is_char_device`],
2357 [`FileTypeExt::is_fifo`], [`FileTypeExt::is_socket`],
2358 [`FileTypeExt`], [`Formatter::alternate`], [`Formatter::fill`],
2359 [`Formatter::precision`], [`Formatter::sign_aware_zero_pad`],
2360 [`Formatter::sign_minus`], [`Formatter::sign_plus`],
2361 [`Formatter::width`], [`Iterator::cmp`], [`Iterator::eq`],
2362 [`Iterator::ge`], [`Iterator::gt`], [`Iterator::le`],
2363 [`Iterator::lt`], [`Iterator::ne`], [`Iterator::partial_cmp`],
2364 [`Path::canonicalize`], [`Path::exists`], [`Path::is_dir`],
2365 [`Path::is_file`], [`Path::metadata`], [`Path::read_dir`],
2366 [`Path::read_link`], [`Path::symlink_metadata`],
2367 [`Utf8Error::valid_up_to`], [`Vec::resize`],
2368 [`VecDeque::as_mut_slices`], [`VecDeque::as_slices`],
2369 [`VecDeque::insert`], [`VecDeque::shrink_to_fit`],
2370 [`VecDeque::swap_remove_back`], [`VecDeque::swap_remove_front`],
2371 [`slice::split_first_mut`], [`slice::split_first`],
2372 [`slice::split_last_mut`], [`slice::split_last`],
2373 [`char::from_u32_unchecked`], [`fs::canonicalize`],
2374 [`str::MatchIndices`], [`str::RMatchIndices`],
2375 [`str::match_indices`], [`str::rmatch_indices`],
2376 [`str::slice_mut_unchecked`], [`string::ParseError`].
2377 * Rust applications hosted on crates.io can be installed locally to
2378 `~/.cargo/bin` with the [`cargo install`] command. Among other
2379 things this makes it easier to augment Cargo with new subcommands:
2380 when a binary named e.g. `cargo-foo` is found in `$PATH` it can be
2381 invoked as `cargo foo`.
2382 * Crates with wildcard (`*`) dependencies will [emit warnings when
2383 published][1.5w]. In 1.6 it will no longer be possible to publish
2384 crates with wildcard dependencies.
2389 * The rules determining when a particular lifetime must outlive
2390 a particular value (known as '[dropck]') have been [modified
2391 to not rely on parametricity][1.5p].
2392 * [Implementations of `AsRef` and `AsMut` were added to `Box`, `Rc`,
2393 and `Arc`][1.5a]. Because these smart pointer types implement
2394 `Deref`, this causes breakage in cases where the interior type
2395 contains methods of the same name.
2396 * [Correct a bug in Rc/Arc][1.5c] that caused [dropck] to be unaware
2397 that they could drop their content. Soundness fix.
2398 * All method invocations are [properly checked][1.5wf1] for
2399 [well-formedness][1.5wf2]. Soundness fix.
2400 * Traits whose supertraits contain `Self` are [not object
2401 safe][1.5o]. Soundness fix.
2402 * Target specifications support a [`no_default_libraries`][1.5nd]
2403 setting that controls whether `-nodefaultlibs` is passed to the
2404 linker, and in turn the `is_like_windows` setting no longer affects
2405 the `-nodefaultlibs` flag.
2406 * `#[derive(Show)]`, long-deprecated, [has been removed][1.5ds].
2407 * The `#[inline]` and `#[repr]` attributes [can only appear
2408 in valid locations][1.5at].
2409 * Native libraries linked from the local crate are [passed to
2410 the linker before native libraries from upstream crates][1.5nl].
2411 * Two rarely-used attributes, `#[no_debug]` and
2412 `#[omit_gdb_pretty_printer_section]` [are feature gated][1.5fg].
2413 * Negation of unsigned integers, which has been a warning for
2414 several releases, [is now behind a feature gate and will
2415 generate errors][1.5nu].
2416 * The parser accidentally accepted visibility modifiers on
2417 enum variants, a bug [which has been fixed][1.5ev].
2418 * [A bug was fixed that allowed `use` statements to import unstable
2424 * When evaluating expressions at compile-time that are not
2425 compile-time constants (const-evaluating expressions in non-const
2426 contexts), incorrect code such as overlong bitshifts and arithmetic
2427 overflow will [generate a warning instead of an error][1.5ce],
2428 delaying the error until runtime. This will allow the
2429 const-evaluator to be expanded in the future backwards-compatibly.
2430 * The `improper_ctypes` lint [no longer warns about using `isize` and
2431 `usize` in FFI][1.5ict].
2436 * `Arc<T>` and `Rc<T>` are [covariant with respect to `T` instead of
2438 * `Default` is [implemented for mutable slices][1.5d].
2439 * `FromStr` is [implemented for `SockAddrV4` and `SockAddrV6`][1.5s].
2440 * There are now `From` conversions [between floating point
2441 types][1.5f] where the conversions are lossless.
2442 * Thera are now `From` conversions [between integer types][1.5i] where
2443 the conversions are lossless.
2444 * [`fs::Metadata` implements `Clone`][1.5fs].
2445 * The `parse` method [accepts a leading "+" when parsing
2447 * [`AsMut` is implemented for `Vec`][1.5am].
2448 * The `clone_from` implementations for `String` and `BinaryHeap` [have
2449 been optimized][1.5cf] and no longer rely on the default impl.
2450 * The `extern "Rust"`, `extern "C"`, `unsafe extern "Rust"` and
2451 `unsafe extern "C"` function types now [implement `Clone`,
2452 `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and
2453 `fmt::Debug` for up to 12 arguments][1.5fp].
2454 * [Dropping `Vec`s is much faster in unoptimized builds when the
2455 element types don't implement `Drop`][1.5dv].
2456 * A bug that caused in incorrect behavior when [combining `VecDeque`
2457 with zero-sized types][1.5vdz] was resolved.
2458 * [`PartialOrd` for slices is faster][1.5po].
2463 * [Crate metadata size was reduced by 20%][1.5md].
2464 * [Improvements to code generation reduced the size of libcore by 3.3
2465 MB and rustc's memory usage by 18MB][1.5m].
2466 * [Improvements to deref translation increased performance in
2467 unoptimized builds][1.5dr].
2468 * Various errors in trait resolution [are deduplicated to only be
2469 reported once][1.5te].
2470 * Rust has preliminary [support for rumprun kernels][1.5rr].
2471 * Rust has preliminary [support for NetBSD on amd64][1.5na].
2473 [1.5use]: https://github.com/rust-lang/rust/pull/28364
2474 [1.5po]: https://github.com/rust-lang/rust/pull/28436
2475 [1.5ev]: https://github.com/rust-lang/rust/pull/28442
2476 [1.5nu]: https://github.com/rust-lang/rust/pull/28468
2477 [1.5dr]: https://github.com/rust-lang/rust/pull/28491
2478 [1.5vdz]: https://github.com/rust-lang/rust/pull/28494
2479 [1.5md]: https://github.com/rust-lang/rust/pull/28521
2480 [1.5fg]: https://github.com/rust-lang/rust/pull/28522
2481 [1.5dv]: https://github.com/rust-lang/rust/pull/28531
2482 [1.5na]: https://github.com/rust-lang/rust/pull/28543
2483 [1.5fp]: https://github.com/rust-lang/rust/pull/28560
2484 [1.5rr]: https://github.com/rust-lang/rust/pull/28593
2485 [1.5cf]: https://github.com/rust-lang/rust/pull/28602
2486 [1.5nl]: https://github.com/rust-lang/rust/pull/28605
2487 [1.5te]: https://github.com/rust-lang/rust/pull/28645
2488 [1.5at]: https://github.com/rust-lang/rust/pull/28650
2489 [1.5am]: https://github.com/rust-lang/rust/pull/28663
2490 [1.5m]: https://github.com/rust-lang/rust/pull/28778
2491 [1.5ict]: https://github.com/rust-lang/rust/pull/28779
2492 [1.5a]: https://github.com/rust-lang/rust/pull/28811
2493 [1.5pi]: https://github.com/rust-lang/rust/pull/28826
2494 [1.5ce]: https://github.com/rust-lang/rfcs/blob/master/text/1229-compile-time-asserts.md
2495 [1.5p]: https://github.com/rust-lang/rfcs/blob/master/text/1238-nonparametric-dropck.md
2496 [1.5i]: https://github.com/rust-lang/rust/pull/28921
2497 [1.5fs]: https://github.com/rust-lang/rust/pull/29021
2498 [1.5f]: https://github.com/rust-lang/rust/pull/29129
2499 [1.5ds]: https://github.com/rust-lang/rust/pull/29148
2500 [1.5s]: https://github.com/rust-lang/rust/pull/29190
2501 [1.5d]: https://github.com/rust-lang/rust/pull/29245
2502 [1.5o]: https://github.com/rust-lang/rust/pull/29259
2503 [1.5nd]: https://github.com/rust-lang/rust/pull/28578
2504 [1.5wf2]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
2505 [1.5wf1]: https://github.com/rust-lang/rust/pull/28669
2506 [dropck]: https://doc.rust-lang.org/nightly/nomicon/dropck.html
2507 [1.5c]: https://github.com/rust-lang/rust/pull/29110
2508 [1.5w]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
2509 [`cargo install`]: https://github.com/rust-lang/rfcs/blob/master/text/1200-cargo-install.md
2510 [`BinaryHeap::from`]: http://doc.rust-lang.org/nightly/std/convert/trait.From.html#method.from
2511 [`BinaryHeap::into_sorted_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_sorted_vec
2512 [`BinaryHeap::into_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_vec
2513 [`Condvar::wait_timeout`]: http://doc.rust-lang.org/nightly/std/sync/struct.Condvar.html#method.wait_timeout
2514 [`FileTypeExt::is_block_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_block_device
2515 [`FileTypeExt::is_char_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_char_device
2516 [`FileTypeExt::is_fifo`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_fifo
2517 [`FileTypeExt::is_socket`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_socket
2518 [`FileTypeExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html
2519 [`Formatter::alternate`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.alternate
2520 [`Formatter::fill`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.fill
2521 [`Formatter::precision`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.precision
2522 [`Formatter::sign_aware_zero_pad`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_aware_zero_pad
2523 [`Formatter::sign_minus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_minus
2524 [`Formatter::sign_plus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_plus
2525 [`Formatter::width`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.width
2526 [`Iterator::cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.cmp
2527 [`Iterator::eq`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.eq
2528 [`Iterator::ge`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ge
2529 [`Iterator::gt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.gt
2530 [`Iterator::le`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.le
2531 [`Iterator::lt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.lt
2532 [`Iterator::ne`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ne
2533 [`Iterator::partial_cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.partial_cmp
2534 [`Path::canonicalize`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.canonicalize
2535 [`Path::exists`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.exists
2536 [`Path::is_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_dir
2537 [`Path::is_file`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_file
2538 [`Path::metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.metadata
2539 [`Path::read_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_dir
2540 [`Path::read_link`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_link
2541 [`Path::symlink_metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.symlink_metadata
2542 [`Utf8Error::valid_up_to`]: http://doc.rust-lang.org/nightly/core/str/struct.Utf8Error.html#method.valid_up_to
2543 [`Vec::resize`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.resize
2544 [`VecDeque::as_mut_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_mut_slices
2545 [`VecDeque::as_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_slices
2546 [`VecDeque::insert`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.insert
2547 [`VecDeque::shrink_to_fit`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.shrink_to_fit
2548 [`VecDeque::swap_remove_back`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_back
2549 [`VecDeque::swap_remove_front`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_front
2550 [`slice::split_first_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first_mut
2551 [`slice::split_first`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first
2552 [`slice::split_last_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last_mut
2553 [`slice::split_last`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last
2554 [`char::from_u32_unchecked`]: http://doc.rust-lang.org/nightly/std/char/fn.from_u32_unchecked.html
2555 [`fs::canonicalize`]: http://doc.rust-lang.org/nightly/std/fs/fn.canonicalize.html
2556 [`str::MatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.MatchIndices.html
2557 [`str::RMatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.RMatchIndices.html
2558 [`str::match_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.match_indices
2559 [`str::rmatch_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatch_indices
2560 [`str::slice_mut_unchecked`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.slice_mut_unchecked
2561 [`string::ParseError`]: http://doc.rust-lang.org/nightly/std/string/enum.ParseError.html
2563 Version 1.4.0 (2015-10-29)
2564 ==========================
2566 * ~1200 changes, numerous bugfixes
2571 * Windows builds targeting the 64-bit MSVC ABI and linker (instead of
2572 GNU) are now supported and recommended for use.
2577 * [Several changes have been made to fix type soundness and improve
2578 the behavior of associated types][sound]. See [RFC 1214]. Although
2579 we have mostly introduced these changes as warnings this release, to
2580 become errors next release, there are still some scenarios that will
2581 see immediate breakage.
2582 * [The `str::lines` and `BufRead::lines` iterators treat `\r\n` as
2583 line breaks in addition to `\n`][crlf].
2584 * [Loans of `'static` lifetime extend to the end of a function][stat].
2585 * [`str::parse` no longer introduces avoidable rounding error when
2586 parsing floating point numbers. Together with earlier changes to
2587 float formatting/output, "round trips" like f.to_string().parse()
2588 now preserve the value of f exactly. Additionally, leading plus
2589 signs are now accepted][fp3].
2595 * `use` statements that import multiple items [can now rename
2596 them][i], as in `use foo::{bar as kitten, baz as puppy}`.
2597 * [Binops work correctly on fat pointers][binfat].
2598 * `pub extern crate`, which does not behave as expected, [issues a
2599 warning][pec] until a better solution is found.
2604 * [Many APIs were stabilized][stab]: `<Box<str>>::into_string`,
2605 [`Arc::downgrade`], [`Arc::get_mut`], [`Arc::make_mut`],
2606 [`Arc::try_unwrap`], [`Box::from_raw`], [`Box::into_raw`], [`CStr::to_str`],
2607 [`CStr::to_string_lossy`], [`CString::from_raw`], [`CString::into_raw`],
2608 [`IntoRawFd::into_raw_fd`], [`IntoRawFd`],
2609 `IntoRawHandle::into_raw_handle`, `IntoRawHandle`,
2610 `IntoRawSocket::into_raw_socket`, `IntoRawSocket`, [`Rc::downgrade`],
2611 [`Rc::get_mut`], [`Rc::make_mut`], [`Rc::try_unwrap`], [`Result::expect`],
2612 [`String::into_boxed_str`], [`TcpStream::read_timeout`],
2613 [`TcpStream::set_read_timeout`], [`TcpStream::set_write_timeout`],
2614 [`TcpStream::write_timeout`], [`UdpSocket::read_timeout`],
2615 [`UdpSocket::set_read_timeout`], [`UdpSocket::set_write_timeout`],
2616 [`UdpSocket::write_timeout`], `Vec::append`, `Vec::split_off`,
2617 [`VecDeque::append`], [`VecDeque::retain`], [`VecDeque::split_off`],
2618 [`rc::Weak::upgrade`], [`rc::Weak`], [`slice::Iter::as_slice`],
2619 [`slice::IterMut::into_slice`], [`str::CharIndices::as_str`],
2620 [`str::Chars::as_str`], [`str::split_at_mut`], [`str::split_at`],
2621 [`sync::Weak::upgrade`], [`sync::Weak`], [`thread::park_timeout`],
2623 * [Some APIs were deprecated][dep]: `BTreeMap::with_b`,
2624 `BTreeSet::with_b`, `Option::as_mut_slice`, `Option::as_slice`,
2625 `Result::as_mut_slice`, `Result::as_slice`, `f32::from_str_radix`,
2626 `f64::from_str_radix`.
2627 * [Reverse-searching strings is faster with the 'two-way'
2629 * [`std::io::copy` allows `?Sized` arguments][cc].
2630 * The `Windows`, `Chunks`, and `ChunksMut` iterators over slices all
2631 [override `count`, `nth` and `last` with an O(1)
2632 implementation][it].
2633 * [`Default` is implemented for arrays up to `[T; 32]`][d].
2634 * [`IntoRawFd` has been added to the Unix-specific prelude,
2635 `IntoRawSocket` and `IntoRawHandle` to the Windows-specific
2637 * [`Extend<String>` and `FromIterator<String` are both implemented for
2639 * [`IntoIterator` is implemented for references to `Option` and
2641 * [`HashMap` and `HashSet` implement `Extend<&T>` where `T:
2642 Copy`][ext] as part of [RFC 839]. This will cause type inferance
2643 breakage in rare situations.
2644 * [`BinaryHeap` implements `Debug`][bh2].
2645 * [`Borrow` and `BorrowMut` are implemented for fixed-size
2647 * [`extern fn`s with the "Rust" and "C" ABIs implement common
2648 traits including `Eq`, `Ord`, `Debug`, `Hash`][fp].
2649 * [String comparison is faster][faststr].
2650 * `&mut T` where `T: std::fmt::Write` [also implements
2651 `std::fmt::Write`][mutw].
2652 * [A stable regression in `VecDeque::push_back` and other
2653 capicity-altering methods that caused panics for zero-sized types
2655 * [Function pointers implement traits for up to 12 parameters][fp2].
2660 * The compiler [no longer uses the 'morestack' feature to prevent
2661 stack overflow][mm]. Instead it uses guard pages and stack
2662 probes (though stack probes are not yet implemented on any platform
2664 * [The compiler matches traits faster when projections are involved][p].
2665 * The 'improper_ctypes' lint [no longer warns about use of `isize` and
2667 * [Cargo now displays useful information about what its doing during
2668 `cargo update`][cu].
2670 [`Arc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.downgrade
2671 [`Arc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.make_mut
2672 [`Arc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.get_mut
2673 [`Arc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.try_unwrap
2674 [`Box::from_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.from_raw
2675 [`Box::into_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.into_raw
2676 [`CStr::to_str`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_str
2677 [`CStr::to_string_lossy`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_string_lossy
2678 [`CString::from_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.from_raw
2679 [`CString::into_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_raw
2680 [`IntoRawFd::into_raw_fd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html#tymethod.into_raw_fd
2681 [`IntoRawFd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html
2682 [`Rc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.downgrade
2683 [`Rc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.get_mut
2684 [`Rc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.make_mut
2685 [`Rc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.try_unwrap
2686 [`Result::expect`]: http://doc.rust-lang.org/nightly/core/result/enum.Result.html#method.expect
2687 [`String::into_boxed_str`]: http://doc.rust-lang.org/nightly/collections/string/struct.String.html#method.into_boxed_str
2688 [`TcpStream::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
2689 [`TcpStream::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
2690 [`TcpStream::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
2691 [`TcpStream::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
2692 [`UdpSocket::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
2693 [`UdpSocket::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
2694 [`UdpSocket::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
2695 [`UdpSocket::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
2696 [`VecDeque::append`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.append
2697 [`VecDeque::retain`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.retain
2698 [`VecDeque::split_off`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.split_off
2699 [`rc::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html#method.upgrade
2700 [`rc::Weak`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html
2701 [`slice::Iter::as_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.Iter.html#method.as_slice
2702 [`slice::IterMut::into_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.IterMut.html#method.into_slice
2703 [`str::CharIndices::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.CharIndices.html#method.as_str
2704 [`str::Chars::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.Chars.html#method.as_str
2705 [`str::split_at_mut`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at_mut
2706 [`str::split_at`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at
2707 [`sync::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html#method.upgrade
2708 [`sync::Weak`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html
2709 [`thread::park_timeout`]: http://doc.rust-lang.org/nightly/std/thread/fn.park_timeout.html
2710 [`thread::sleep`]: http://doc.rust-lang.org/nightly/std/thread/fn.sleep.html
2711 [bh2]: https://github.com/rust-lang/rust/pull/28156
2712 [binfat]: https://github.com/rust-lang/rust/pull/28270
2713 [bm]: https://github.com/rust-lang/rust/pull/28197
2714 [cc]: https://github.com/rust-lang/rust/pull/27531
2715 [crlf]: https://github.com/rust-lang/rust/pull/28034
2716 [cu]: https://github.com/rust-lang/cargo/pull/1931
2717 [d]: https://github.com/rust-lang/rust/pull/27825
2718 [dep]: https://github.com/rust-lang/rust/pull/28339
2719 [es]: https://github.com/rust-lang/rust/pull/27956
2720 [ext]: https://github.com/rust-lang/rust/pull/28094
2721 [faststr]: https://github.com/rust-lang/rust/pull/28338
2722 [ffi]: https://github.com/rust-lang/rust/pull/28779
2723 [fp]: https://github.com/rust-lang/rust/pull/28268
2724 [fp2]: https://github.com/rust-lang/rust/pull/28560
2725 [fp3]: https://github.com/rust-lang/rust/pull/27307
2726 [i]: https://github.com/rust-lang/rust/pull/27451
2727 [into2]: https://github.com/rust-lang/rust/pull/28039
2728 [it]: https://github.com/rust-lang/rust/pull/27652
2729 [mm]: https://github.com/rust-lang/rust/pull/27338
2730 [mutw]: https://github.com/rust-lang/rust/pull/28368
2731 [sound]: https://github.com/rust-lang/rust/pull/27641
2732 [p]: https://github.com/rust-lang/rust/pull/27866
2733 [pec]: https://github.com/rust-lang/rust/pull/28486
2734 [pr]: https://github.com/rust-lang/rust/pull/27896
2735 [RFC 839]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
2736 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
2737 [s]: https://github.com/rust-lang/rust/pull/27474
2738 [stab]: https://github.com/rust-lang/rust/pull/28339
2739 [stat]: https://github.com/rust-lang/rust/pull/28321
2740 [vd]: https://github.com/rust-lang/rust/pull/28494
2742 Version 1.3.0 (2015-09-17)
2743 ==============================
2745 * ~900 changes, numerous bugfixes
2750 * The [new object lifetime defaults][nold] have been [turned
2751 on][nold2] after a cycle of warnings about the change. Now types
2752 like `&'a Box<Trait>` (or `&'a Rc<Trait>`, etc) will change from
2753 being interpreted as `&'a Box<Trait+'a>` to `&'a
2754 Box<Trait+'static>`.
2755 * [The Rustonomicon][nom] is a new book in the official documentation
2756 that dives into writing unsafe Rust.
2757 * The [`Duration`] API, [has been stabilized][ds]. This basic unit of
2758 timekeeping is employed by other std APIs, as well as out-of-tree
2764 * The [new object lifetime defaults][nold] have been [turned
2765 on][nold2] after a cycle of warnings about the change.
2766 * There is a known [regression][lr] in how object lifetime elision is
2767 interpreted, the proper solution for which is undetermined.
2768 * The `#[prelude_import]` attribute, an internal implementation
2769 detail, was accidentally stabilized previously. [It has been put
2770 behind the `prelude_import` feature gate][pi]. This change is
2771 believed to break no existing code.
2772 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
2773 [more sane for dynamically sized types][dst3]. Code that relied on
2774 the previous behavior is thought to be broken.
2775 * The `dropck` rules, which checks that destructors can't access
2776 destroyed values, [have been updated][dropck] to match the
2777 [RFC][dropckrfc]. This fixes some soundness holes, and as such will
2778 cause some previously-compiling code to no longer build.
2783 * The [new object lifetime defaults][nold] have been [turned
2784 on][nold2] after a cycle of warnings about the change.
2785 * Semicolons may [now follow types and paths in
2786 macros](https://github.com/rust-lang/rust/pull/27000).
2787 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
2788 [more sane for dynamically sized types][dst3]. Code that relied on
2789 the previous behavior is not known to exist, and suspected to be
2791 * `'static` variables [may now be recursive][st].
2792 * `ref` bindings choose between [`Deref`] and [`DerefMut`]
2793 implementations correctly.
2794 * The `dropck` rules, which checks that destructors can't access
2795 destroyed values, [have been updated][dropck] to match the
2801 * The [`Duration`] API, [has been stabilized][ds], as well as the
2802 `std::time` module, which presently contains only `Duration`.
2803 * `Box<str>` and `Box<[T]>` both implement `Clone`.
2804 * The owned C string, [`CString`], implements [`Borrow`] and the
2805 borrowed C string, [`CStr`], implements [`ToOwned`]. The two of
2806 these allow C strings to be borrowed and cloned in generic code.
2807 * [`CStr`] implements [`Debug`].
2808 * [`AtomicPtr`] implements [`Debug`].
2809 * [`Error`] trait objects [can be downcast to their concrete types][e]
2810 in many common configurations, using the [`is`], [`downcast`],
2811 [`downcast_ref`] and [`downcast_mut`] methods, similarly to the
2813 * Searching for substrings now [employs the two-way algorithm][search]
2814 instead of doing a naive search. This gives major speedups to a
2815 number of methods, including [`contains`][sc], [`find`][sf],
2816 [`rfind`][srf], [`split`][ss]. [`starts_with`][ssw] and
2817 [`ends_with`][sew] are also faster.
2818 * The performance of `PartialEq` for slices is [much faster][ps].
2819 * The [`Hash`] trait offers the default method, [`hash_slice`], which
2820 is overridden and optimized by the implementations for scalars.
2821 * The [`Hasher`] trait now has a number of specialized `write_*`
2822 methods for primitive types, for efficiency.
2823 * The I/O-specific error type, [`std::io::Error`][ie], gained a set of
2824 methods for accessing the 'inner error', if any: [`get_ref`][iegr],
2825 [`get_mut`][iegm], [`into_inner`][ieii]. As well, the implementation
2826 of [`std::error::Error::cause`][iec] also delegates to the inner
2828 * [`process::Child`][pc] gained the [`id`] method, which returns a
2829 `u32` representing the platform-specific process identifier.
2830 * The [`connect`] method on slices is deprecated, replaced by the new
2831 [`join`] method (note that both of these are on the *unstable*
2832 [`SliceConcatExt`] trait, but through the magic of the prelude are
2833 available to stable code anyway).
2834 * The [`Div`] operator is implemented for [`Wrapping`] types.
2835 * [`DerefMut` is implemented for `String`][dms].
2836 * Performance of SipHash (the default hasher for `HashMap`) is
2837 [better for long data][sh].
2838 * [`AtomicPtr`] implements [`Send`].
2839 * The [`read_to_end`] implementations for [`Stdin`] and [`File`]
2840 are now [specialized to use uninitalized buffers for increased
2842 * Lifetime parameters of foreign functions [are now resolved
2848 * Rust can now, with some coercion, [produce programs that run on
2849 Windows XP][xp], though XP is not considered a supported platform.
2850 * Porting Rust on Windows from the GNU toolchain to MSVC continues
2851 ([1][win1], [2][win2], [3][win3], [4][win4]). It is still not
2852 recommended for use in 1.3, though should be fully-functional
2853 in the [64-bit 1.4 beta][b14].
2854 * On Fedora-based systems installation will [properly configure the
2855 dynamic linker][fl].
2856 * The compiler gained many new extended error descriptions, which can
2857 be accessed with the `--explain` flag.
2858 * The `dropck` pass, which checks that destructors can't access
2859 destroyed values, [has been rewritten][dropck]. This fixes some
2860 soundness holes, and as such will cause some previously-compiling
2861 code to no longer build.
2862 * `rustc` now uses [LLVM to write archive files where possible][ar].
2863 Eventually this will eliminate the compiler's dependency on the ar
2865 * Rust has [preliminary support for i686 FreeBSD][fb] (it has long
2866 supported FreeBSD on x86_64).
2867 * The [`unused_mut`][lum], [`unconditional_recursion`][lur],
2868 [`improper_ctypes`][lic], and [`negate_unsigned`][lnu] lints are
2870 * If landing pads are disabled (with `-Z no-landing-pads`), [`panic!`
2871 will kill the process instead of leaking][nlp].
2873 [`Any`]: http://doc.rust-lang.org/nightly/std/any/trait.Any.html
2874 [`AtomicPtr`]: http://doc.rust-lang.org/nightly/std/sync/atomic/struct.AtomicPtr.html
2875 [`Borrow`]: http://doc.rust-lang.org/nightly/std/borrow/trait.Borrow.html
2876 [`CStr`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html
2877 [`CString`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html
2878 [`Debug`]: http://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
2879 [`DerefMut`]: http://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
2880 [`Deref`]: http://doc.rust-lang.org/nightly/std/ops/trait.Deref.html
2881 [`Div`]: http://doc.rust-lang.org/nightly/std/ops/trait.Div.html
2882 [`Duration`]: http://doc.rust-lang.org/nightly/std/time/struct.Duration.html
2883 [`Error`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html
2884 [`File`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html
2885 [`Hash`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html
2886 [`Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
2887 [`Send`]: http://doc.rust-lang.org/nightly/std/marker/trait.Send.html
2888 [`SliceConcatExt`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html
2889 [`Stdin`]: http://doc.rust-lang.org/nightly/std/io/struct.Stdin.html
2890 [`ToOwned`]: http://doc.rust-lang.org/nightly/std/borrow/trait.ToOwned.html
2891 [`Wrapping`]: http://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
2892 [`connect`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.connect
2893 [`downcast_mut`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_mut
2894 [`downcast_ref`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_ref
2895 [`downcast`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast
2896 [`hash_slice`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
2897 [`id`]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html#method.id
2898 [`is`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.is
2899 [`join`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.join
2900 [`read_to_end`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_to_end
2901 [ar]: https://github.com/rust-lang/rust/pull/26926
2902 [b14]: https://static.rust-lang.org/dist/rust-beta-x86_64-pc-windows-msvc.msi
2903 [dms]: https://github.com/rust-lang/rust/pull/26241
2904 [dropck]: https://github.com/rust-lang/rust/pull/27261
2905 [dropckrfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
2906 [ds]: https://github.com/rust-lang/rust/pull/26818
2907 [dst1]: http://doc.rust-lang.org/nightly/std/mem/fn.size_of_val.html
2908 [dst2]: http://doc.rust-lang.org/nightly/std/mem/fn.align_of_val.html
2909 [dst3]: https://github.com/rust-lang/rust/pull/27351
2910 [e]: https://github.com/rust-lang/rust/pull/24793
2911 [f]: https://github.com/rust-lang/rust/pull/26588
2912 [fb]: https://github.com/rust-lang/rust/pull/26959
2913 [fl]: https://github.com/rust-lang/rust-installer/pull/41
2914 [hs]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
2915 [ie]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html
2916 [iec]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.cause
2917 [iegm]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_mut
2918 [iegr]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_ref
2919 [ieii]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.into_inner
2920 [lic]: https://github.com/rust-lang/rust/pull/26583
2921 [lnu]: https://github.com/rust-lang/rust/pull/27026
2922 [lr]: https://github.com/rust-lang/rust/issues/27248
2923 [lum]: https://github.com/rust-lang/rust/pull/26378
2924 [lur]: https://github.com/rust-lang/rust/pull/26783
2925 [nlp]: https://github.com/rust-lang/rust/pull/27176
2926 [nold2]: https://github.com/rust-lang/rust/pull/27045
2927 [nold]: https://github.com/rust-lang/rfcs/blob/master/text/1156-adjust-default-object-bounds.md
2928 [nom]: http://doc.rust-lang.org/nightly/nomicon/
2929 [pc]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html
2930 [pi]: https://github.com/rust-lang/rust/pull/26699
2931 [ps]: https://github.com/rust-lang/rust/pull/26884
2932 [rte]: https://github.com/rust-lang/rust/pull/26950
2933 [sc]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.contains
2934 [search]: https://github.com/rust-lang/rust/pull/26327
2935 [sew]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.ends_with
2936 [sf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.find
2937 [sh]: https://github.com/rust-lang/rust/pull/27280
2938 [srf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rfind
2939 [ss]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split
2940 [ssw]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.starts_with
2941 [st]: https://github.com/rust-lang/rust/pull/26630
2942 [win1]: https://github.com/rust-lang/rust/pull/26569
2943 [win2]: https://github.com/rust-lang/rust/pull/26741
2944 [win3]: https://github.com/rust-lang/rust/pull/26741
2945 [win4]: https://github.com/rust-lang/rust/pull/27210
2946 [xp]: https://github.com/rust-lang/rust/pull/26569
2948 Version 1.2.0 (2015-08-07)
2949 ==========================
2951 * ~1200 changes, numerous bugfixes
2956 * [Dynamically-sized-type coercions][dst] allow smart pointer types
2957 like `Rc` to contain types without a fixed size, arrays and trait
2958 objects, finally enabling use of `Rc<[T]>` and completing the
2959 implementation of DST.
2960 * [Parallel codegen][parcodegen] is now working again, which can
2961 substantially speed up large builds in debug mode; It also gets
2962 another ~33% speedup when bootstrapping on a 4 core machine (using 8
2963 jobs). It's not enabled by default, but will be "in the near
2964 future". It can be activated with the `-C codegen-units=N` flag to
2966 * This is the first release with [experimental support for linking
2967 with the MSVC linker and lib C on Windows (instead of using the GNU
2968 variants via MinGW)][win]. It is yet recommended only for the most
2969 intrepid Rusticians.
2970 * Benchmark compilations are showing a 30% improvement in
2971 bootstrapping over 1.1.
2976 * The [`to_uppercase`] and [`to_lowercase`] methods on `char` now do
2977 unicode case mapping, which is a previously-planned change in
2978 behavior and considered a bugfix.
2979 * [`mem::align_of`] now specifies [the *minimum alignment* for
2980 T][align], which is usually the alignment programs are interested
2981 in, and the same value reported by clang's
2982 `alignof`. [`mem::min_align_of`] is deprecated. This is not known to
2984 * [The `#[packed]` attribute is no longer silently accepted by the
2985 compiler][packed]. This attribute did nothing and code that
2986 mentioned it likely did not work as intended.
2987 * Associated type defaults are [now behind the
2988 `associated_type_defaults` feature gate][ad]. In 1.1 associated type
2989 defaults *did not work*, but could be mentioned syntactically. As
2990 such this breakage has minimal impact.
2995 * Patterns with `ref mut` now correctly invoke [`DerefMut`] when
2996 matching against dereferencable values.
3001 * The [`Extend`] trait, which grows a collection from an iterator, is
3002 implemented over iterators of references, for `String`, `Vec`,
3003 `LinkedList`, `VecDeque`, `EnumSet`, `BinaryHeap`, `VecMap`,
3004 `BTreeSet` and `BTreeMap`. [RFC][extend-rfc].
3005 * The [`iter::once`] function returns an iterator that yields a single
3006 element, and [`iter::empty`] returns an iterator that yields no
3008 * The [`matches`] and [`rmatches`] methods on `str` return iterators
3009 over substring matches.
3010 * [`Cell`] and [`RefCell`] both implement `Eq`.
3011 * A number of methods for wrapping arithmetic are added to the
3012 integral types, [`wrapping_div`], [`wrapping_rem`],
3013 [`wrapping_neg`], [`wrapping_shl`], [`wrapping_shr`]. These are in
3014 addition to the existing [`wrapping_add`], [`wrapping_sub`], and
3015 [`wrapping_mul`] methods, and alternatives to the [`Wrapping`]
3016 type.. It is illegal for the default arithmetic operations in Rust
3017 to overflow; the desire to wrap must be explicit.
3018 * The `{:#?}` formatting specifier [displays the alternate,
3019 pretty-printed][debugfmt] form of the `Debug` formatter. This
3020 feature was actually introduced prior to 1.0 with little
3022 * [`fmt::Formatter`] implements [`fmt::Write`], a `fmt`-specific trait
3023 for writing data to formatted strings, similar to [`io::Write`].
3024 * [`fmt::Formatter`] adds 'debug builder' methods, [`debug_struct`],
3025 [`debug_tuple`], [`debug_list`], [`debug_set`], [`debug_map`]. These
3026 are used by code generators to emit implementations of [`Debug`].
3027 * `str` has new [`to_uppercase`][strup] and [`to_lowercase`][strlow]
3028 methods that convert case, following Unicode case mapping.
3029 * It is now easier to handle poisoned locks. The [`PoisonError`]
3030 type, returned by failing lock operations, exposes `into_inner`,
3031 `get_ref`, and `get_mut`, which all give access to the inner lock
3032 guard, and allow the poisoned lock to continue to operate. The
3033 `is_poisoned` method of [`RwLock`] and [`Mutex`] can poll for a
3034 poisoned lock without attempting to take the lock.
3035 * On Unix the [`FromRawFd`] trait is implemented for [`Stdio`], and
3036 [`AsRawFd`] for [`ChildStdin`], [`ChildStdout`], [`ChildStderr`].
3037 On Windows the `FromRawHandle` trait is implemented for `Stdio`,
3038 and `AsRawHandle` for `ChildStdin`, `ChildStdout`,
3040 * [`io::ErrorKind`] has a new variant, `InvalidData`, which indicates
3046 * `rustc` employs smarter heuristics for guessing at [typos].
3047 * `rustc` emits more efficient code for [no-op conversions between
3048 unsafe pointers][nop].
3049 * Fat pointers are now [passed in pairs of immediate arguments][fat],
3050 resulting in faster compile times and smaller code.
3052 [`Extend`]: https://doc.rust-lang.org/nightly/std/iter/trait.Extend.html
3053 [extend-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
3054 [`iter::once`]: https://doc.rust-lang.org/nightly/std/iter/fn.once.html
3055 [`iter::empty`]: https://doc.rust-lang.org/nightly/std/iter/fn.empty.html
3056 [`matches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.matches
3057 [`rmatches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatches
3058 [`Cell`]: https://doc.rust-lang.org/nightly/std/cell/struct.Cell.html
3059 [`RefCell`]: https://doc.rust-lang.org/nightly/std/cell/struct.RefCell.html
3060 [`wrapping_add`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_add
3061 [`wrapping_sub`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_sub
3062 [`wrapping_mul`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_mul
3063 [`wrapping_div`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_div
3064 [`wrapping_rem`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_rem
3065 [`wrapping_neg`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_neg
3066 [`wrapping_shl`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shl
3067 [`wrapping_shr`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shr
3068 [`Wrapping`]: https://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
3069 [`fmt::Formatter`]: https://doc.rust-lang.org/nightly/std/fmt/struct.Formatter.html
3070 [`fmt::Write`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Write.html
3071 [`io::Write`]: https://doc.rust-lang.org/nightly/std/io/trait.Write.html
3072 [`debug_struct`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_struct
3073 [`debug_tuple`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_tuple
3074 [`debug_list`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_list
3075 [`debug_set`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_set
3076 [`debug_map`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_map
3077 [`Debug`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
3078 [strup]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_uppercase
3079 [strlow]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_lowercase
3080 [`to_uppercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_uppercase
3081 [`to_lowercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_lowercase
3082 [`PoisonError`]: https://doc.rust-lang.org/nightly/std/sync/struct.PoisonError.html
3083 [`RwLock`]: https://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html
3084 [`Mutex`]: https://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html
3085 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
3086 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
3087 [`Stdio`]: https://doc.rust-lang.org/nightly/std/process/struct.Stdio.html
3088 [`ChildStdin`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdin.html
3089 [`ChildStdout`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdout.html
3090 [`ChildStderr`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStderr.html
3091 [`io::ErrorKind`]: https://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html
3092 [debugfmt]: https://www.reddit.com/r/rust/comments/3ceaui/psa_produces_prettyprinted_debug_output/
3093 [`DerefMut`]: https://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
3094 [`mem::align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.align_of.html
3095 [align]: https://github.com/rust-lang/rust/pull/25646
3096 [`mem::min_align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.min_align_of.html
3097 [typos]: https://github.com/rust-lang/rust/pull/26087
3098 [nop]: https://github.com/rust-lang/rust/pull/26336
3099 [fat]: https://github.com/rust-lang/rust/pull/26411
3100 [dst]: https://github.com/rust-lang/rfcs/blob/master/text/0982-dst-coercion.md
3101 [parcodegen]: https://github.com/rust-lang/rust/pull/26018
3102 [packed]: https://github.com/rust-lang/rust/pull/25541
3103 [ad]: https://github.com/rust-lang/rust/pull/27382
3104 [win]: https://github.com/rust-lang/rust/pull/25350
3106 Version 1.1.0 (2015-06-25)
3107 =========================
3109 * ~850 changes, numerous bugfixes
3114 * The [`std::fs` module has been expanded][fs] to expand the set of
3115 functionality exposed:
3116 * `DirEntry` now supports optimizations like `file_type` and `metadata` which
3117 don't incur a syscall on some platforms.
3118 * A `symlink_metadata` function has been added.
3119 * The `fs::Metadata` structure now lowers to its OS counterpart, providing
3120 access to all underlying information.
3121 * The compiler now contains extended explanations of many errors. When an error
3122 with an explanation occurs the compiler suggests using the `--explain` flag
3123 to read the explanation. Error explanations are also [available online][err-index].
3124 * Thanks to multiple [improvements][sk] to [type checking][pre], as
3125 well as other work, the time to bootstrap the compiler decreased by
3131 * The [`str::split_whitespace`] method splits a string on unicode
3132 whitespace boundaries.
3133 * On both Windows and Unix, new extension traits provide conversion of
3134 I/O types to and from the underlying system handles. On Unix, these
3135 traits are [`FromRawFd`] and [`AsRawFd`], on Windows `FromRawHandle`
3136 and `AsRawHandle`. These are implemented for `File`, `TcpStream`,
3137 `TcpListener`, and `UpdSocket`. Further implementations for
3138 `std::process` will be stabilized later.
3139 * On Unix, [`std::os::unix::symlink`] creates symlinks. On
3140 Windows, symlinks can be created with
3141 `std::os::windows::symlink_dir` and
3142 `std::os::windows::symlink_file`.
3143 * The `mpsc::Receiver` type can now be converted into an iterator with
3144 `into_iter` on the [`IntoIterator`] trait.
3145 * `Ipv4Addr` can be created from `u32` with the `From<u32>`
3146 implementation of the [`From`] trait.
3147 * The `Debug` implementation for `RangeFull` [creates output that is
3148 more consistent with other implementations][rf].
3149 * [`Debug` is implemented for `File`][file].
3150 * The `Default` implementation for `Arc` [no longer requires `Sync +
3152 * [The `Iterator` methods `count`, `nth`, and `last` have been
3153 overridden for slices to have O(1) performance instead of O(n)][si].
3154 * Incorrect handling of paths on Windows has been improved in both the
3155 compiler and the standard library.
3156 * [`AtomicPtr` gained a `Default` implementation][ap].
3157 * In accordance with Rust's policy on arithmetic overflow `abs` now
3158 [panics on overflow when debug assertions are enabled][abs].
3159 * The [`Cloned`] iterator, which was accidentally left unstable for
3160 1.0 [has been stabilized][c].
3161 * The [`Incoming`] iterator, which iterates over incoming TCP
3162 connections, and which was accidentally unnamable in 1.0, [is now
3163 properly exported][inc].
3164 * [`BinaryHeap`] no longer corrupts itself [when functions called by
3165 `sift_up` or `sift_down` panic][bh].
3166 * The [`split_off`] method of `LinkedList` [no longer corrupts
3167 the list in certain scenarios][ll].
3172 * Type checking performance [has improved notably][sk] with
3173 [multiple improvements][pre].
3174 * The compiler [suggests code changes][ch] for more errors.
3175 * rustc and it's build system have experimental support for [building
3176 toolchains against MUSL][m] instead of glibc on Linux.
3177 * The compiler defines the `target_env` cfg value, which is used for
3178 distinguishing toolchains that are otherwise for the same
3179 platform. Presently this is set to `gnu` for common GNU Linux
3180 targets and for MinGW targets, and `musl` for MUSL Linux targets.
3181 * The [`cargo rustc`][crc] command invokes a build with custom flags
3183 * [Android executables are always position independent][pie].
3184 * [The `drop_with_repr_extern` lint warns about mixing `repr(C)`
3187 [`str::split_whitespace`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_whitespace
3188 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
3189 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
3190 [`std::os::unix::symlink`]: https://doc.rust-lang.org/nightly/std/os/unix/fs/fn.symlink.html
3191 [`IntoIterator`]: https://doc.rust-lang.org/nightly/std/iter/trait.IntoIterator.html
3192 [`From`]: https://doc.rust-lang.org/nightly/std/convert/trait.From.html
3193 [rf]: https://github.com/rust-lang/rust/pull/24491
3194 [err-index]: https://doc.rust-lang.org/error-index.html
3195 [sk]: https://github.com/rust-lang/rust/pull/24615
3196 [pre]: https://github.com/rust-lang/rust/pull/25323
3197 [file]: https://github.com/rust-lang/rust/pull/24598
3198 [ch]: https://github.com/rust-lang/rust/pull/24683
3199 [arc]: https://github.com/rust-lang/rust/pull/24695
3200 [si]: https://github.com/rust-lang/rust/pull/24701
3201 [ap]: https://github.com/rust-lang/rust/pull/24834
3202 [m]: https://github.com/rust-lang/rust/pull/24777
3203 [fs]: https://github.com/rust-lang/rfcs/blob/master/text/1044-io-fs-2.1.md
3204 [crc]: https://github.com/rust-lang/cargo/pull/1568
3205 [pie]: https://github.com/rust-lang/rust/pull/24953
3206 [abs]: https://github.com/rust-lang/rust/pull/25441
3207 [c]: https://github.com/rust-lang/rust/pull/25496
3208 [`Cloned`]: https://doc.rust-lang.org/nightly/std/iter/struct.Cloned.html
3209 [`Incoming`]: https://doc.rust-lang.org/nightly/std/net/struct.Incoming.html
3210 [inc]: https://github.com/rust-lang/rust/pull/25522
3211 [bh]: https://github.com/rust-lang/rust/pull/25856
3212 [`BinaryHeap`]: https://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html
3213 [ll]: https://github.com/rust-lang/rust/pull/26022
3214 [`split_off`]: https://doc.rust-lang.org/nightly/collections/linked_list/struct.LinkedList.html#method.split_off
3215 [drop]: https://github.com/rust-lang/rust/pull/24935
3217 Version 1.0.0 (2015-05-15)
3218 ========================
3220 * ~1500 changes, numerous bugfixes
3225 * The vast majority of the standard library is now `#[stable]`. It is
3226 no longer possible to use unstable features with a stable build of
3228 * Many popular crates on [crates.io] now work on the stable release
3230 * Arithmetic on basic integer types now [checks for overflow in debug
3236 * Several [restrictions have been added to trait coherence][coh] in
3237 order to make it easier for upstream authors to change traits
3238 without breaking downstream code.
3239 * Digits of binary and octal literals are [lexed more eagerly][lex] to
3240 improve error messages and macro behavior. For example, `0b1234` is
3241 now lexed as `0b1234` instead of two tokens, `0b1` and `234`.
3242 * Trait bounds [are always invariant][inv], eliminating the need for
3243 the `PhantomFn` and `MarkerTrait` lang items, which have been
3245 * ["-" is no longer a valid character in crate names][cr], the `extern crate
3246 "foo" as bar` syntax has been replaced with `extern crate foo as
3247 bar`, and Cargo now automatically translates "-" in *package* names
3248 to underscore for the crate name.
3249 * [Lifetime shadowing is an error][lt].
3250 * [`Send` no longer implies `'static`][send-rfc].
3251 * [UFCS now supports trait-less associated paths][moar-ufcs] like
3252 `MyType::default()`.
3253 * Primitive types [now have inherent methods][prim-inherent],
3254 obviating the need for extension traits like `SliceExt`.
3255 * Methods with `Self: Sized` in their `where` clause are [considered
3256 object-safe][self-sized], allowing many extension traits like
3257 `IteratorExt` to be merged into the traits they extended.
3258 * You can now [refer to associated types][assoc-where] whose
3259 corresponding trait bounds appear only in a `where` clause.
3260 * The final bits of [OIBIT landed][oibit-final], meaning that traits
3261 like `Send` and `Sync` are now library-defined.
3262 * A [Reflect trait][reflect] was introduced, which means that
3263 downcasting via the `Any` trait is effectively limited to concrete
3264 types. This helps retain the potentially-important "parametricity"
3265 property: generic code cannot behave differently for different type
3266 arguments except in minor ways.
3267 * The `unsafe_destructor` feature is now deprecated in favor of the
3268 [new `dropck`][dropck]. This change is a major reduction in unsafe
3274 * The `thread_local` module [has been renamed to `std::thread`][th].
3275 * The methods of `IteratorExt` [have been moved to the `Iterator`
3277 * Several traits that implement Rust's conventions for type
3278 conversions, `AsMut`, `AsRef`, `From`, and `Into` have been
3279 [centralized in the `std::convert` module][con].
3280 * The `FromError` trait [was removed in favor of `From`][fe].
3281 * The basic sleep function [has moved to
3282 `std::thread::sleep_ms`][slp].
3283 * The `splitn` function now takes an `n` parameter that represents the
3284 number of items yielded by the returned iterator [instead of the
3285 number of 'splits'][spl].
3286 * [On Unix, all file descriptors are `CLOEXEC` by default][clo].
3287 * [Derived implementations of `PartialOrd` now order enums according
3288 to their explicitly-assigned discriminants][po].
3289 * [Methods for searching strings are generic over `Pattern`s][pat],
3290 implemented presently by `&char`, `&str`, `FnMut(char) -> bool` and
3292 * [In method resolution, object methods are resolved before inherent
3294 * [`String::from_str` has been deprecated in favor of the `From` impl,
3295 `String::from`][sf].
3296 * [`io::Error` implements `Sync`][ios].
3297 * [The `words` method on `&str` has been replaced with
3298 `split_whitespace`][sw], to avoid answering the tricky question, 'what is
3300 * The new path and IO modules are complete and `#[stable]`. This
3301 was the major library focus for this cycle.
3302 * The path API was [revised][path-normalize] to normalize `.`,
3303 adjusting the tradeoffs in favor of the most common usage.
3304 * A large number of remaining APIs in `std` were also stabilized
3305 during this cycle; about 75% of the non-deprecated API surface
3307 * The new [string pattern API][string-pattern] landed, which makes
3308 the string slice API much more internally consistent and flexible.
3309 * A new set of [generic conversion traits][conversion] replaced
3310 many existing ad hoc traits.
3311 * Generic numeric traits were [completely removed][num-traits]. This
3312 was made possible thanks to inherent methods for primitive types,
3313 and the removal gives maximal flexibility for designing a numeric
3314 hierarchy in the future.
3315 * The `Fn` traits are now related via [inheritance][fn-inherit]
3316 and provide ergonomic [blanket implementations][fn-blanket].
3317 * The `Index` and `IndexMut` traits were changed to
3318 [take the index by value][index-value], enabling code like
3319 `hash_map["string"]` to work.
3320 * `Copy` now [inherits][copy-clone] from `Clone`, meaning that all
3321 `Copy` data is known to be `Clone` as well.
3326 * Many errors now have extended explanations that can be accessed with
3327 the `--explain` flag to `rustc`.
3328 * Many new examples have been added to the standard library
3330 * rustdoc has received a number of improvements focused on completion
3332 * Metadata was tuned, shrinking binaries [by 27%][metadata-shrink].
3333 * Much headway was made on ecosystem-wide CI, making it possible
3334 to [compare builds for breakage][ci-compare].
3337 [crates.io]: http://crates.io
3338 [clo]: https://github.com/rust-lang/rust/pull/24034
3339 [coh]: https://github.com/rust-lang/rfcs/blob/master/text/1023-rebalancing-coherence.md
3340 [con]: https://github.com/rust-lang/rust/pull/23875
3341 [cr]: https://github.com/rust-lang/rust/pull/23419
3342 [fe]: https://github.com/rust-lang/rust/pull/23879
3343 [ie]: https://github.com/rust-lang/rust/pull/23300
3344 [inv]: https://github.com/rust-lang/rust/pull/23938
3345 [ios]: https://github.com/rust-lang/rust/pull/24133
3346 [lex]: https://github.com/rust-lang/rfcs/blob/master/text/0879-small-base-lexing.md
3347 [lt]: https://github.com/rust-lang/rust/pull/24057
3348 [meth]: https://github.com/rust-lang/rust/pull/24056
3349 [pat]: https://github.com/rust-lang/rfcs/blob/master/text/0528-string-patterns.md
3350 [po]: https://github.com/rust-lang/rust/pull/24270
3351 [sf]: https://github.com/rust-lang/rust/pull/24517
3352 [slp]: https://github.com/rust-lang/rust/pull/23949
3353 [spl]: https://github.com/rust-lang/rfcs/blob/master/text/0979-align-splitn-with-other-languages.md
3354 [sw]: https://github.com/rust-lang/rfcs/blob/master/text/1054-str-words.md
3355 [th]: https://github.com/rust-lang/rfcs/blob/master/text/0909-move-thread-local-to-std-thread.md
3356 [send-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0458-send-improvements.md
3357 [moar-ufcs]: https://github.com/rust-lang/rust/pull/22172
3358 [prim-inherent]: https://github.com/rust-lang/rust/pull/23104
3359 [overflow]: https://github.com/rust-lang/rfcs/blob/master/text/0560-integer-overflow.md
3360 [metadata-shrink]: https://github.com/rust-lang/rust/pull/22971
3361 [self-sized]: https://github.com/rust-lang/rust/pull/22301
3362 [assoc-where]: https://github.com/rust-lang/rust/pull/22512
3363 [string-pattern]: https://github.com/rust-lang/rust/pull/22466
3364 [oibit-final]: https://github.com/rust-lang/rust/pull/21689
3365 [reflect]: https://github.com/rust-lang/rust/pull/23712
3366 [conversion]: https://github.com/rust-lang/rfcs/pull/529
3367 [num-traits]: https://github.com/rust-lang/rust/pull/23549
3368 [index-value]: https://github.com/rust-lang/rust/pull/23601
3369 [dropck]: https://github.com/rust-lang/rfcs/pull/769
3370 [ci-compare]: https://gist.github.com/brson/a30a77836fbec057cbee
3371 [fn-inherit]: https://github.com/rust-lang/rust/pull/23282
3372 [fn-blanket]: https://github.com/rust-lang/rust/pull/23895
3373 [copy-clone]: https://github.com/rust-lang/rust/pull/23860
3374 [path-normalize]: https://github.com/rust-lang/rust/pull/23229
3377 Version 1.0.0-alpha.2 (2015-02-20)
3378 =====================================
3380 * ~1300 changes, numerous bugfixes
3384 * The various I/O modules were [overhauled][io-rfc] to reduce
3385 unnecessary abstractions and provide better interoperation with
3386 the underlying platform. The old `io` module remains temporarily
3388 * The standard library now [participates in feature gating][feat],
3389 so use of unstable libraries now requires a `#![feature(...)]`
3390 attribute. The impact of this change is [described on the
3391 forum][feat-forum]. [RFC][feat-rfc].
3395 * `for` loops [now operate on the `IntoIterator` trait][into],
3396 which eliminates the need to call `.iter()`, etc. to iterate
3397 over collections. There are some new subtleties to remember
3398 though regarding what sort of iterators various types yield, in
3399 particular that `for foo in bar { }` yields values from a move
3400 iterator, destroying the original collection. [RFC][into-rfc].
3401 * Objects now have [default lifetime bounds][obj], so you don't
3402 have to write `Box<Trait+'static>` when you don't care about
3403 storing references. [RFC][obj-rfc].
3404 * In types that implement `Drop`, [lifetimes must outlive the
3405 value][drop]. This will soon make it possible to safely
3406 implement `Drop` for types where `#[unsafe_destructor]` is now
3407 required. Read the [gorgeous RFC][drop-rfc] for details.
3408 * The fully qualified <T as Trait>::X syntax lets you set the Self
3409 type for a trait method or associated type. [RFC][ufcs-rfc].
3410 * References to types that implement `Deref<U>` now [automatically
3411 coerce to references][deref] to the dereferenced type `U`,
3412 e.g. `&T where T: Deref<U>` automatically coerces to `&U`. This
3413 should eliminate many unsightly uses of `&*`, as when converting
3414 from references to vectors into references to
3415 slices. [RFC][deref-rfc].
3416 * The explicit [closure kind syntax][close] (`|&:|`, `|&mut:|`,
3417 `|:|`) is obsolete and closure kind is inferred from context.
3418 * [`Self` is a keyword][Self].
3422 * The `Show` and `String` formatting traits [have been
3423 renamed][fmt] to `Debug` and `Display` to more clearly reflect
3424 their related purposes. Automatically getting a string
3425 conversion to use with `format!("{:?}", something_to_debug)` is
3426 now written `#[derive(Debug)]`.
3427 * Abstract [OS-specific string types][osstr], `std::ff::{OsString,
3428 OsStr}`, provide strings in platform-specific encodings for easier
3429 interop with system APIs. [RFC][osstr-rfc].
3430 * The `boxed::into_raw` and `Box::from_raw` functions [convert
3431 between `Box<T>` and `*mut T`][boxraw], a common pattern for
3432 creating raw pointers.
3436 * Certain long error messages of the form 'expected foo found bar'
3437 are now [split neatly across multiple
3438 lines][multiline]. Examples in the PR.
3439 * On Unix Rust can be [uninstalled][un] by running
3440 `/usr/local/lib/rustlib/uninstall.sh`.
3441 * The `#[rustc_on_unimplemented]` attribute, requiring the
3442 'on_unimplemented' feature, lets rustc [display custom error
3443 messages when a trait is expected to be implemented for a type
3448 * Rust is tested against a [LALR grammar][lalr], which parses
3449 almost all the Rust files that rustc does.
3451 [boxraw]: https://github.com/rust-lang/rust/pull/21318
3452 [close]: https://github.com/rust-lang/rust/pull/21843
3453 [deref]: https://github.com/rust-lang/rust/pull/21351
3454 [deref-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0241-deref-conversions.md
3455 [drop]: https://github.com/rust-lang/rust/pull/21972
3456 [drop-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
3457 [feat]: https://github.com/rust-lang/rust/pull/21248
3458 [feat-forum]: https://users.rust-lang.org/t/psa-important-info-about-rustcs-new-feature-staging/82/5
3459 [feat-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0507-release-channels.md
3460 [fmt]: https://github.com/rust-lang/rust/pull/21457
3461 [into]: https://github.com/rust-lang/rust/pull/20790
3462 [into-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md#intoiterator-and-iterable
3463 [io-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
3464 [lalr]: https://github.com/rust-lang/rust/pull/21452
3465 [multiline]: https://github.com/rust-lang/rust/pull/19870
3466 [obj]: https://github.com/rust-lang/rust/pull/22230
3467 [obj-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0599-default-object-bound.md
3468 [onun]: https://github.com/rust-lang/rust/pull/20889
3469 [osstr]: https://github.com/rust-lang/rust/pull/21488
3470 [osstr-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
3471 [Self]: https://github.com/rust-lang/rust/pull/22158
3472 [ufcs-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0132-ufcs.md
3473 [un]: https://github.com/rust-lang/rust/pull/22256
3476 Version 1.0.0-alpha (2015-01-09)
3477 ==================================
3479 * ~2400 changes, numerous bugfixes
3483 * The language itself is considered feature complete for 1.0,
3484 though there will be many usability improvements and bugfixes
3485 before the final release.
3486 * Nearly 50% of the public API surface of the standard library has
3487 been declared 'stable'. Those interfaces are unlikely to change
3489 * The long-running debate over integer types has been
3490 [settled][ints]: Rust will ship with types named `isize` and
3491 `usize`, rather than `int` and `uint`, for pointer-sized
3492 integers. Guidelines will be rolled out during the alpha cycle.
3493 * Most crates that are not `std` have been moved out of the Rust
3494 distribution into the Cargo ecosystem so they can evolve
3495 separately and don't need to be stabilized as quickly, including
3496 'time', 'getopts', 'num', 'regex', and 'term'.
3497 * Documentation continues to be expanded with more API coverage, more
3498 examples, and more in-depth explanations. The guides have been
3499 consolidated into [The Rust Programming Language][trpl].
3500 * "[Rust By Example][rbe]" is now maintained by the Rust team.
3501 * All official Rust binary installers now come with [Cargo], the
3502 Rust package manager.
3506 * Closures have been [completely redesigned][unboxed] to be
3507 implemented in terms of traits, can now be used as generic type
3508 bounds and thus monomorphized and inlined, or via an opaque
3509 pointer (boxed) as in the old system. The new system is often
3510 referred to as 'unboxed' closures.
3511 * Traits now support [associated types][assoc], allowing families
3512 of related types to be defined together and used generically in
3514 * Enum variants are [namespaced by their type names][enum].
3515 * [`where` clauses][where] provide a more versatile and attractive
3516 syntax for specifying generic bounds, though the previous syntax
3518 * Rust again picks a [fallback][fb] (either i32 or f64) for uninferred
3520 * Rust [no longer has a runtime][rt] of any description, and only
3521 supports OS threads, not green threads.
3522 * At long last, Rust has been overhauled for 'dynamically-sized
3523 types' ([DST]), which integrates 'fat pointers' (object types,
3524 arrays, and `str`) more deeply into the type system, making it
3526 * Rust now has a general [range syntax][range], `i..j`, `i..`, and
3527 `..j` that produce range types and which, when combined with the
3528 `Index` operator and multidispatch, leads to a convenient slice
3530 * The new range syntax revealed an ambiguity in the fixed-length
3531 array syntax, so now fixed length arrays [are written `[T;
3533 * The `Copy` trait is no longer implemented automatically. Unsafe
3534 pointers no longer implement `Sync` and `Send` so types
3535 containing them don't automatically either. `Sync` and `Send`
3536 are now 'unsafe traits' so one can "forcibly" implement them via
3537 `unsafe impl` if a type confirms to the requirements for them
3538 even though the internals do not (e.g. structs containing unsafe
3539 pointers like `Arc`). These changes are intended to prevent some
3540 footguns and are collectively known as [opt-in built-in
3541 traits][oibit] (though `Sync` and `Send` will soon become pure
3542 library types unknown to the compiler).
3543 * Operator traits now take their operands [by value][ops], and
3544 comparison traits can use multidispatch to compare one type
3545 against multiple other types, allowing e.g. `String` to be
3546 compared with `&str`.
3547 * `if let` and `while let` are no longer feature-gated.
3548 * Rust has adopted a more [uniform syntax for escaping unicode
3549 characters][unicode].
3550 * `macro_rules!` [has been declared stable][mac]. Though it is a
3551 flawed system it is sufficiently popular that it must be usable
3552 for 1.0. Effort has gone into [future-proofing][mac-future] it
3553 in ways that will allow other macro systems to be developed in
3554 parallel, and won't otherwise impact the evolution of the
3556 * The prelude has been [pared back significantly][prelude] such
3557 that it is the minimum necessary to support the most pervasive
3558 code patterns, and through [generalized where clauses][where]
3559 many of the prelude extension traits have been consolidated.
3560 * Rust's rudimentary reflection [has been removed][refl], as it
3561 incurred too much code generation for little benefit.
3562 * [Struct variants][structvars] are no longer feature-gated.
3563 * Trait bounds can be [polymorphic over lifetimes][hrtb]. Also
3564 known as 'higher-ranked trait bounds', this crucially allows
3565 unboxed closures to work.
3566 * Macros invocations surrounded by parens or square brackets and
3567 not terminated by a semicolon are [parsed as
3568 expressions][macros], which makes expressions like `vec![1i32,
3569 2, 3].len()` work as expected.
3570 * Trait objects now implement their traits automatically, and
3571 traits that can be coerced to objects now must be [object
3573 * Automatically deriving traits is now done with `#[derive(...)]`
3574 not `#[deriving(...)]` for [consistency with other naming
3575 conventions][derive].
3576 * Importing the containing module or enum at the same time as
3577 items or variants they contain is [now done with `self` instead
3578 of `mod`][self], as in use `foo::{self, bar}`
3579 * Glob imports are no longer feature-gated.
3580 * The `box` operator and `box` patterns have been feature-gated
3581 pending a redesign. For now unique boxes should be allocated
3582 like other containers, with `Box::new`.
3586 * A [series][coll1] of [efforts][coll2] to establish
3587 [conventions][coll3] for collections types has resulted in API
3588 improvements throughout the standard library.
3589 * New [APIs for error handling][err] provide ergonomic interop
3590 between error types, and [new conventions][err-conv] describe
3591 more clearly the recommended error handling strategies in Rust.
3592 * The `fail!` macro has been renamed to [`panic!`][panic] so that
3593 it is easier to discuss failure in the context of error handling
3594 without making clarifications as to whether you are referring to
3595 the 'fail' macro or failure more generally.
3596 * On Linux, `OsRng` prefers the new, more reliable `getrandom`
3597 syscall when available.
3598 * The 'serialize' crate has been renamed 'rustc-serialize' and
3599 moved out of the distribution to Cargo. Although it is widely
3600 used now, it is expected to be superseded in the near future.
3601 * The `Show` formatter, typically implemented with
3602 `#[derive(Show)]` is [now requested with the `{:?}`
3603 specifier][show] and is intended for use by all types, for uses
3604 such as `println!` debugging. The new `String` formatter must be
3605 implemented by hand, uses the `{}` specifier, and is intended
3606 for full-fidelity conversions of things that can logically be
3607 represented as strings.
3611 * [Flexible target specification][flex] allows rustc's code
3612 generation to be configured to support otherwise-unsupported
3614 * Rust comes with rust-gdb and rust-lldb scripts that launch their
3615 respective debuggers with Rust-appropriate pretty-printing.
3616 * The Windows installation of Rust is distributed with the
3617 MinGW components currently required to link binaries on that
3622 * Nullable enum optimizations have been extended to more types so
3623 that e.g. `Option<Vec<T>>` and `Option<String>` take up no more
3624 space than the inner types themselves.
3625 * Work has begun on supporting AArch64.
3627 [Cargo]: https://crates.io
3628 [unboxed]: http://smallcultfollowing.com/babysteps/blog/2014/11/26/purging-proc/
3629 [enum]: https://github.com/rust-lang/rfcs/blob/master/text/0390-enum-namespacing.md
3630 [flex]: https://github.com/rust-lang/rfcs/blob/master/text/0131-target-specification.md
3631 [err]: https://github.com/rust-lang/rfcs/blob/master/text/0201-error-chaining.md
3632 [err-conv]: https://github.com/rust-lang/rfcs/blob/master/text/0236-error-conventions.md
3633 [rt]: https://github.com/rust-lang/rfcs/blob/master/text/0230-remove-runtime.md
3634 [mac]: https://github.com/rust-lang/rfcs/blob/master/text/0453-macro-reform.md
3635 [mac-future]: https://github.com/rust-lang/rfcs/pull/550
3636 [DST]: http://smallcultfollowing.com/babysteps/blog/2014/01/05/dst-take-5/
3637 [coll1]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md
3638 [coll2]: https://github.com/rust-lang/rfcs/blob/master/text/0509-collections-reform-part-2.md
3639 [coll3]: https://github.com/rust-lang/rfcs/blob/master/text/0216-collection-views.md
3640 [ops]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md
3641 [prelude]: https://github.com/rust-lang/rfcs/blob/master/text/0503-prelude-stabilization.md
3642 [where]: https://github.com/rust-lang/rfcs/blob/master/text/0135-where.md
3643 [refl]: https://github.com/rust-lang/rfcs/blob/master/text/0379-remove-reflection.md
3644 [panic]: https://github.com/rust-lang/rfcs/blob/master/text/0221-panic.md
3645 [structvars]: https://github.com/rust-lang/rfcs/blob/master/text/0418-struct-variants.md
3646 [hrtb]: https://github.com/rust-lang/rfcs/blob/master/text/0387-higher-ranked-trait-bounds.md
3647 [unicode]: https://github.com/rust-lang/rfcs/blob/master/text/0446-es6-unicode-escapes.md
3648 [oibit]: https://github.com/rust-lang/rfcs/blob/master/text/0019-opt-in-builtin-traits.md
3649 [macros]: https://github.com/rust-lang/rfcs/blob/master/text/0378-expr-macros.md
3650 [range]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md#indexing-and-slicing
3651 [arrays]: https://github.com/rust-lang/rfcs/blob/master/text/0520-new-array-repeat-syntax.md
3652 [show]: https://github.com/rust-lang/rfcs/blob/master/text/0504-show-stabilization.md
3653 [derive]: https://github.com/rust-lang/rfcs/blob/master/text/0534-deriving2derive.md
3654 [self]: https://github.com/rust-lang/rfcs/blob/master/text/0532-self-in-use.md
3655 [fb]: https://github.com/rust-lang/rfcs/blob/master/text/0212-restore-int-fallback.md
3656 [objsafe]: https://github.com/rust-lang/rfcs/blob/master/text/0255-object-safety.md
3657 [assoc]: https://github.com/rust-lang/rfcs/blob/master/text/0195-associated-items.md
3658 [ints]: https://github.com/rust-lang/rfcs/pull/544#issuecomment-68760871
3659 [trpl]: https://doc.rust-lang.org/book/index.html
3660 [rbe]: http://rustbyexample.com/
3663 Version 0.12.0 (2014-10-09)
3664 =============================
3666 * ~1900 changes, numerous bugfixes
3670 * The introductory documentation (now called The Rust Guide) has
3671 been completely rewritten, as have a number of supplementary
3673 * Rust's package manager, Cargo, continues to improve and is
3674 sometimes considered to be quite awesome.
3675 * Many API's in `std` have been reviewed and updated for
3676 consistency with the in-development Rust coding
3677 guidelines. The standard library documentation tracks
3678 stabilization progress.
3679 * Minor libraries have been moved out-of-tree to the rust-lang org
3680 on GitHub: uuid, semver, glob, num, hexfloat, fourcc. They can
3681 be installed with Cargo.
3682 * Lifetime elision allows lifetime annotations to be left off of
3683 function declarations in many common scenarios.
3684 * Rust now works on 64-bit Windows.
3687 * Indexing can be overloaded with the `Index` and `IndexMut`
3689 * The `if let` construct takes a branch only if the `let` pattern
3690 matches, currently behind the 'if_let' feature gate.
3691 * 'where clauses', a more flexible syntax for specifying trait
3692 bounds that is more aesthetic, have been added for traits and
3693 free functions. Where clauses will in the future make it
3694 possible to constrain associated types, which would be
3695 impossible with the existing syntax.
3696 * A new slicing syntax (e.g. `[0..4]`) has been introduced behind
3697 the 'slicing_syntax' feature gate, and can be overloaded with
3698 the `Slice` or `SliceMut` traits.
3699 * The syntax for matching of sub-slices has been changed to use a
3700 postfix `..` instead of prefix (.e.g. `[a, b, c..]`), for
3701 consistency with other uses of `..` and to future-proof
3702 potential additional uses of the syntax.
3703 * The syntax for matching inclusive ranges in patterns has changed
3704 from `0..3` to `0...4` to be consistent with the exclusive range
3706 * Matching of sub-slices in non-tail positions (e.g. `[a.., b,
3707 c]`) has been put behind the 'advanced_slice_patterns' feature
3708 gate and may be removed in the future.
3709 * Components of tuples and tuple structs can be extracted using
3710 the `value.0` syntax, currently behind the `tuple_indexing`
3712 * The `#[crate_id]` attribute is no longer supported; versioning
3713 is handled by the package manager.
3714 * Renaming crate imports are now written `extern crate foo as bar`
3715 instead of `extern crate bar = foo`.
3716 * Renaming use statements are now written `use foo as bar` instead
3718 * `let` and `match` bindings and argument names in macros are now
3720 * The new, more efficient, closure types ('unboxed closures') have
3721 been added under a feature gate, 'unboxed_closures'. These will
3722 soon replace the existing closure types, once higher-ranked
3723 trait lifetimes are added to the language.
3724 * `move` has been added as a keyword, for indicating closures
3725 that capture by value.
3726 * Mutation and assignment is no longer allowed in pattern guards.
3727 * Generic structs and enums can now have trait bounds.
3728 * The `Share` trait is now called `Sync` to free up the term
3729 'shared' to refer to 'shared reference' (the default reference
3731 * Dynamically-sized types have been mostly implemented,
3732 unifying the behavior of fat-pointer types with the rest of the
3734 * As part of dynamically-sized types, the `Sized` trait has been
3735 introduced, which qualifying types implement by default, and
3736 which type parameters expect by default. To specify that a type
3737 parameter does not need to be sized, write `<Sized? T>`. Most
3738 types are `Sized`, notable exceptions being unsized arrays
3739 (`[T]`) and trait types.
3740 * Closures can return `!`, as in `|| -> !` or `proc() -> !`.
3741 * Lifetime bounds can now be applied to type parameters and object
3743 * The old, reference counted GC type, `Gc<T>` which was once
3744 denoted by the `@` sigil, has finally been removed. GC will be
3745 revisited in the future.
3748 * Library documentation has been improved for a number of modules.
3749 * Bit-vectors, collections::bitv has been modernized.
3750 * The url crate is deprecated in favor of
3751 http://github.com/servo/rust-url, which can be installed with
3753 * Most I/O stream types can be cloned and subsequently closed from
3755 * A `std::time::Duration` type has been added for use in I/O
3756 methods that rely on timers, as well as in the 'time' crate's
3757 `Timespec` arithmetic.
3758 * The runtime I/O abstraction layer that enabled the green thread
3759 scheduler to do non-thread-blocking I/O has been removed, along
3760 with the libuv-based implementation employed by the green thread
3761 scheduler. This will greatly simplify the future I/O work.
3762 * `collections::btree` has been rewritten to have a more
3763 idiomatic and efficient design.
3766 * rustdoc output now indicates the stability levels of API's.
3767 * The `--crate-name` flag can specify the name of the crate
3768 being compiled, like `#[crate_name]`.
3769 * The `-C metadata` specifies additional metadata to hash into
3770 symbol names, and `-C extra-filename` specifies additional
3771 information to put into the output filename, for use by the
3772 package manager for versioning.
3773 * debug info generation has continued to improve and should be
3774 more reliable under both gdb and lldb.
3775 * rustc has experimental support for compiling in parallel
3776 using the `-C codegen-units` flag.
3777 * rustc no longer encodes rpath information into binaries by
3781 * Stack usage has been optimized with LLVM lifetime annotations.
3782 * Official Rust binaries on Linux are more compatible with older
3783 kernels and distributions, built on CentOS 5.10.
3786 Version 0.11.0 (2014-07-02)
3787 ==========================
3789 * ~1700 changes, numerous bugfixes
3792 * ~[T] has been removed from the language. This type is superseded by
3794 * ~str has been removed from the language. This type is superseded by
3796 * ~T has been removed from the language. This type is superseded by the
3798 * @T has been removed from the language. This type is superseded by the
3799 standard library's std::gc::Gc<T> type.
3800 * Struct fields are now all private by default.
3801 * Vector indices and shift amounts are both required to be a `uint`
3802 instead of any integral type.
3803 * Byte character, byte string, and raw byte string literals are now all
3804 supported by prefixing the normal literal with a `b`.
3805 * Multiple ABIs are no longer allowed in an ABI string
3806 * The syntax for lifetimes on closures/procedures has been tweaked
3807 slightly: `<'a>|A, B|: 'b + K -> T`
3808 * Floating point modulus has been removed from the language; however it
3809 is still provided by a library implementation.
3810 * Private enum variants are now disallowed.
3811 * The `priv` keyword has been removed from the language.
3812 * A closure can no longer be invoked through a &-pointer.
3813 * The `use foo, bar, baz;` syntax has been removed from the language.
3814 * The transmute intrinsic no longer works on type parameters.
3815 * Statics now allow blocks/items in their definition.
3816 * Trait bounds are separated from objects with + instead of : now.
3817 * Objects can no longer be read while they are mutably borrowed.
3818 * The address of a static is now marked as insignificant unless the
3819 #[inline(never)] attribute is placed it.
3820 * The #[unsafe_destructor] attribute is now behind a feature gate.
3821 * Struct literals are no longer allowed in ambiguous positions such as
3822 if, while, match, and for..in.
3823 * Declaration of lang items and intrinsics are now feature-gated by
3825 * Integral literals no longer default to `int`, and floating point
3826 literals no longer default to `f64`. Literals must be suffixed with an
3827 appropriate type if inference cannot determine the type of the
3829 * The Box<T> type is no longer implicitly borrowed to &mut T.
3830 * Procedures are now required to not capture borrowed references.
3833 * The standard library is now a "facade" over a number of underlying
3834 libraries. This means that development on the standard library should
3835 be speeder due to smaller crates, as well as a clearer line between
3837 * A new library, libcore, lives under the standard library's facade
3838 which is Rust's "0-assumption" library, suitable for embedded and
3839 kernel development for example.
3840 * A regex crate has been added to the standard distribution. This crate
3841 includes statically compiled regular expressions.
3842 * The unwrap/unwrap_err methods on Result require a Show bound for
3843 better error messages.
3844 * The return types of the std::comm primitives have been centralized
3845 around the Result type.
3846 * A number of I/O primitives have gained the ability to time out their
3848 * A number of I/O primitives have gained the ability to close their
3849 reading/writing halves to cancel pending operations.
3850 * Reverse iterator methods have been removed in favor of `rev()` on
3851 their forward-iteration counterparts.
3852 * A bitflags! macro has been added to enable easy interop with C and
3853 management of bit flags.
3854 * A debug_assert! macro is now provided which is disabled when
3855 `--cfg ndebug` is passed to the compiler.
3856 * A graphviz crate has been added for creating .dot files.
3857 * The std::cast module has been migrated into std::mem.
3858 * The std::local_data api has been migrated from freestanding functions
3859 to being based on methods.
3860 * The Pod trait has been renamed to Copy.
3861 * jemalloc has been added as the default allocator for types.
3862 * The API for allocating memory has been changed to use proper alignment
3863 and sized deallocation
3864 * Connecting a TcpStream or binding a TcpListener is now based on a
3865 string address and a u16 port. This allows connecting to a hostname as
3867 * The Reader trait now contains a core method, read_at_least(), which
3868 correctly handles many repeated 0-length reads.
3869 * The process-spawning API is now centered around a builder-style
3871 * The :? printing qualifier has been moved from the standard library to
3872 an external libdebug crate.
3873 * Eq/Ord have been renamed to PartialEq/PartialOrd. TotalEq/TotalOrd
3874 have been renamed to Eq/Ord.
3875 * The select/plural methods have been removed from format!. The escapes
3876 for { and } have also changed from \{ and \} to {{ and }},
3878 * The TaskBuilder API has been re-worked to be a true builder, and
3879 extension traits for spawning native/green tasks have been added.
3882 * All breaking changes to the language or libraries now have their
3883 commit message annotated with `[breaking-change]` to allow for easy
3884 discovery of breaking changes.
3885 * The compiler will now try to suggest how to annotate lifetimes if a
3886 lifetime-related error occurs.
3887 * Debug info continues to be improved greatly with general bug fixes and
3888 better support for situations like link time optimization (LTO).
3889 * Usage of syntax extensions when cross-compiling has been fixed.
3890 * Functionality equivalent to GCC & Clang's -ffunction-sections,
3891 -fdata-sections and --gc-sections has been enabled by default
3892 * The compiler is now stricter about where it will load module files
3893 from when a module is declared via `mod foo;`.
3894 * The #[phase(syntax)] attribute has been renamed to #[phase(plugin)].
3895 Syntax extensions are now discovered via a "plugin registrar" type
3896 which will be extended in the future to other various plugins.
3897 * Lints have been restructured to allow for dynamically loadable lints.
3898 * A number of rustdoc improvements:
3899 * The HTML output has been visually redesigned.
3900 * Markdown is now powered by hoedown instead of sundown.
3901 * Searching heuristics have been greatly improved.
3902 * The search index has been reduced in size by a great amount.
3903 * Cross-crate documentation via `pub use` has been greatly improved.
3904 * Primitive types are now hyperlinked and documented.
3905 * Documentation has been moved from static.rust-lang.org/doc to
3907 * A new sandbox, play.rust-lang.org, is available for running and
3908 sharing rust code examples on-line.
3909 * Unused attributes are now more robustly warned about.
3910 * The dead_code lint now warns about unused struct fields.
3911 * Cross-compiling to iOS is now supported.
3912 * Cross-compiling to mipsel is now supported.
3913 * Stability attributes are now inherited by default and no longer apply
3914 to intra-crate usage, only inter-crate usage.
3915 * Error message related to non-exhaustive match expressions have been
3919 Version 0.10 (2014-04-03)
3920 =========================
3922 * ~1500 changes, numerous bugfixes
3925 * A new RFC process is now in place for modifying the language.
3926 * Patterns with `@`-pointers have been removed from the language.
3927 * Patterns with unique vectors (`~[T]`) have been removed from the
3929 * Patterns with unique strings (`~str`) have been removed from the
3931 * `@str` has been removed from the language.
3932 * `@[T]` has been removed from the language.
3933 * `@self` has been removed from the language.
3934 * `@Trait` has been removed from the language.
3935 * Headers on `~` allocations which contain `@` boxes inside the type for
3936 reference counting have been removed.
3937 * The semantics around the lifetimes of temporary expressions have changed,
3938 see #3511 and #11585 for more information.
3939 * Cross-crate syntax extensions are now possible, but feature gated. See
3940 #11151 for more information. This includes both `macro_rules!` macros as
3941 well as syntax extensions such as `format!`.
3942 * New lint modes have been added, and older ones have been turned on to be
3944 * Unnecessary parentheses
3947 * Uppercase variables
3948 * Publicly visible private types
3949 * `#[deriving]` with raw pointers
3950 * Unsafe functions can no longer be coerced to closures.
3951 * Various obscure macros such as `log_syntax!` are now behind feature gates.
3952 * The `#[simd]` attribute is now behind a feature gate.
3953 * Visibility is no longer allowed on `extern crate` statements, and
3954 unnecessary visibility (`priv`) is no longer allowed on `use` statements.
3955 * Trailing commas are now allowed in argument lists and tuple patterns.
3956 * The `do` keyword has been removed, it is now a reserved keyword.
3957 * Default type parameters have been implemented, but are feature gated.
3958 * Borrowed variables through captures in closures are now considered soundly.
3959 * `extern mod` is now `extern crate`
3960 * The `Freeze` trait has been removed.
3961 * The `Share` trait has been added for types that can be shared among
3963 * Labels in macros are now hygienic.
3964 * Expression/statement macro invocations can be delimited with `{}` now.
3965 * Treatment of types allowed in `static mut` locations has been tweaked.
3966 * The `*` and `.` operators are now overloadable through the `Deref` and
3968 * `~Trait` and `proc` no longer have `Send` bounds by default.
3969 * Partial type hints are now supported with the `_` type marker.
3970 * An `Unsafe` type was introduced for interior mutability. It is now
3971 considered undefined to transmute from `&T` to `&mut T` without using the
3973 * The #[linkage] attribute was implemented for extern statics/functions.
3974 * The inner attribute syntax has changed from `#[foo];` to `#![foo]`.
3975 * `Pod` was renamed to `Copy`.
3978 * The `libextra` library has been removed. It has now been decomposed into
3979 component libraries with smaller and more focused nuggets of
3980 functionality. The full list of libraries can be found on the
3981 documentation index page.
3982 * std: `std::condition` has been removed. All I/O errors are now propagated
3983 through the `Result` type. In order to assist with error handling, a
3984 `try!` macro for unwrapping errors with an early return and a lint for
3985 unused results has been added. See #12039 for more information.
3986 * std: The `vec` module has been renamed to `slice`.
3987 * std: A new vector type, `Vec<T>`, has been added in preparation for DST.
3988 This will become the only growable vector in the future.
3989 * std: `std::io` now has more public-reexports. Types such as `BufferedReader`
3990 are now found at `std::io::BufferedReader` instead of
3991 `std::io::buffered::BufferedReader`.
3992 * std: `print` and `println` are no longer in the prelude, the `print!` and
3993 `println!` macros are intended to be used instead.
3994 * std: `Rc` now has a `Weak` pointer for breaking cycles, and it no longer
3995 attempts to statically prevent cycles.
3996 * std: The standard distribution is adopting the policy of pushing failure
3997 to the user rather than failing in libraries. Many functions (such as
3998 `slice::last()`) now return `Option<T>` instead of `T` + failing.
3999 * std: `fmt::Default` has been renamed to `fmt::Show`, and it now has a new
4000 deriving mode: `#[deriving(Show)]`.
4001 * std: `ToStr` is now implemented for all types implementing `Show`.
4002 * std: The formatting trait methods now take `&self` instead of `&T`
4003 * std: The `invert()` method on iterators has been renamed to `rev()`
4004 * std: `std::num` has seen a reduction in the genericity of its traits,
4005 consolidating functionality into a few core traits.
4006 * std: Backtraces are now printed on task failure if the environment
4007 variable `RUST_BACKTRACE` is present.
4008 * std: Naming conventions for iterators have been standardized. More details
4009 can be found on the wiki's style guide.
4010 * std: `eof()` has been removed from the `Reader` trait. Specific types may
4011 still implement the function.
4012 * std: Networking types are now cloneable to allow simultaneous reads/writes.
4013 * std: `assert_approx_eq!` has been removed
4014 * std: The `e` and `E` formatting specifiers for floats have been added to
4015 print them in exponential notation.
4016 * std: The `Times` trait has been removed
4017 * std: Indications of variance and opting out of builtin bounds is done
4018 through marker types in `std::kinds::marker` now
4019 * std: `hash` has been rewritten, `IterBytes` has been removed, and
4020 `#[deriving(Hash)]` is now possible.
4021 * std: `SharedChan` has been removed, `Sender` is now cloneable.
4022 * std: `Chan` and `Port` were renamed to `Sender` and `Receiver`.
4023 * std: `Chan::new` is now `channel()`.
4024 * std: A new synchronous channel type has been implemented.
4025 * std: A `select!` macro is now provided for selecting over `Receiver`s.
4026 * std: `hashmap` and `trie` have been moved to `libcollections`
4027 * std: `run` has been rolled into `io::process`
4028 * std: `assert_eq!` now uses `{}` instead of `{:?}`
4029 * std: The equality and comparison traits have seen some reorganization.
4030 * std: `rand` has moved to `librand`.
4031 * std: `to_{lower,upper}case` has been implemented for `char`.
4032 * std: Logging has been moved to `liblog`.
4033 * collections: `HashMap` has been rewritten for higher performance and less
4035 * native: The default runtime is now `libnative`. If `libgreen` is desired,
4036 it can be booted manually. The runtime guide has more information and
4038 * native: All I/O functionality except signals has been implemented.
4039 * green: Task spawning with `libgreen` has been optimized with stack caching
4040 and various trimming of code.
4041 * green: Tasks spawned by `libgreen` now have an unmapped guard page.
4042 * sync: The `extra::sync` module has been updated to modern rust (and moved
4043 to the `sync` library), tweaking and improving various interfaces while
4044 dropping redundant functionality.
4045 * sync: A new `Barrier` type has been added to the `sync` library.
4046 * sync: An efficient mutex for native and green tasks has been implemented.
4047 * serialize: The `base64` module has seen some improvement. It treats
4048 newlines better, has non-string error values, and has seen general
4050 * fourcc: A `fourcc!` macro was introduced
4051 * hexfloat: A `hexfloat!` macro was implemented for specifying floats via a
4052 hexadecimal literal.
4055 * `rustpkg` has been deprecated and removed from the main repository. Its
4056 replacement, `cargo`, is under development.
4057 * Nightly builds of rust are now available
4058 * The memory usage of rustc has been improved many times throughout this
4060 * The build process supports disabling rpath support for the rustc binary
4062 * Code generation has improved in some cases, giving more information to the
4063 LLVM optimization passes to enable more extensive optimizations.
4064 * Debuginfo compatibility with lldb on OSX has been restored.
4065 * The master branch is now gated on an android bot, making building for
4066 android much more reliable.
4067 * Output flags have been centralized into one `--emit` flag.
4068 * Crate type flags have been centralized into one `--crate-type` flag.
4069 * Codegen flags have been consolidated behind a `-C` flag.
4070 * Linking against outdated crates now has improved error messages.
4071 * Error messages with lifetimes will often suggest how to annotate the
4072 function to fix the error.
4073 * Many more types are documented in the standard library, and new guides
4075 * Many `rustdoc` improvements:
4076 * code blocks are syntax highlighted.
4077 * render standalone markdown files.
4078 * the --test flag tests all code blocks by default.
4079 * exported macros are displayed.
4080 * reexported types have their documentation inlined at the location of the
4082 * search works across crates that have been rendered to the same output
4086 Version 0.9 (2014-01-09)
4087 ==========================
4089 * ~1800 changes, numerous bugfixes
4092 * The `float` type has been removed. Use `f32` or `f64` instead.
4093 * A new facility for enabling experimental features (feature gating) has
4094 been added, using the crate-level `#[feature(foo)]` attribute.
4095 * Managed boxes (@) are now behind a feature gate
4096 (`#[feature(managed_boxes)]`) in preparation for future removal. Use the
4097 standard library's `Gc` or `Rc` types instead.
4098 * `@mut` has been removed. Use `std::cell::{Cell, RefCell}` instead.
4099 * Jumping back to the top of a loop is now done with `continue` instead of
4101 * Strings can no longer be mutated through index assignment.
4102 * Raw strings can be created via the basic `r"foo"` syntax or with matched
4103 hash delimiters, as in `r###"foo"###`.
4104 * `~fn` is now written `proc (args) -> retval { ... }` and may only be
4106 * The `&fn` type is now written `|args| -> ret` to match the literal form.
4107 * `@fn`s have been removed.
4108 * `do` only works with procs in order to make it obvious what the cost
4110 * Single-element tuple-like structs can no longer be dereferenced to
4111 obtain the inner value. A more comprehensive solution for overloading
4112 the dereference operator will be provided in the future.
4113 * The `#[link(...)]` attribute has been replaced with
4114 `#[crate_id = "name#vers"]`.
4115 * Empty `impl`s must be terminated with empty braces and may not be
4116 terminated with a semicolon.
4117 * Keywords are no longer allowed as lifetime names; the `self` lifetime
4118 no longer has any special meaning.
4119 * The old `fmt!` string formatting macro has been removed.
4120 * `printf!` and `printfln!` (old-style formatting) removed in favor of
4121 `print!` and `println!`.
4122 * `mut` works in patterns now, as in `let (mut x, y) = (1, 2);`.
4123 * The `extern mod foo (name = "bar")` syntax has been removed. Use
4124 `extern mod foo = "bar"` instead.
4125 * New reserved keywords: `alignof`, `offsetof`, `sizeof`.
4126 * Macros can have attributes.
4127 * Macros can expand to items with attributes.
4128 * Macros can expand to multiple items.
4129 * The `asm!` macro is feature-gated (`#[feature(asm)]`).
4130 * Comments may be nested.
4131 * Values automatically coerce to trait objects they implement, without
4133 * Enum discriminants are no longer an entire word but as small as needed to
4134 contain all the variants. The `repr` attribute can be used to override
4135 the discriminant size, as in `#[repr(int)]` for integer-sized, and
4136 `#[repr(C)]` to match C enums.
4137 * Non-string literals are not allowed in attributes (they never worked).
4138 * The FFI now supports variadic functions.
4139 * Octal numeric literals, as in `0o7777`.
4140 * The `concat!` syntax extension performs compile-time string concatenation.
4141 * The `#[fixed_stack_segment]` and `#[rust_stack]` attributes have been
4142 removed as Rust no longer uses segmented stacks.
4143 * Non-ascii identifiers are feature-gated (`#[feature(non_ascii_idents)]`).
4144 * Ignoring all fields of an enum variant or tuple-struct is done with `..`,
4145 not `*`; ignoring remaining fields of a struct is also done with `..`,
4146 not `_`; ignoring a slice of a vector is done with `..`, not `.._`.
4147 * `rustc` supports the "win64" calling convention via `extern "win64"`.
4148 * `rustc` supports the "system" calling convention, which defaults to the
4149 preferred convention for the target platform, "stdcall" on 32-bit Windows,
4151 * The `type_overflow` lint (default: warn) checks literals for overflow.
4152 * The `unsafe_block` lint (default: allow) checks for usage of `unsafe`.
4153 * The `attribute_usage` lint (default: warn) warns about unknown
4155 * The `unknown_features` lint (default: warn) warns about unknown
4157 * The `dead_code` lint (default: warn) checks for dead code.
4158 * Rust libraries can be linked statically to one another
4159 * `#[link_args]` is behind the `link_args` feature gate.
4160 * Native libraries are now linked with `#[link(name = "foo")]`
4161 * Native libraries can be statically linked to a rust crate
4162 (`#[link(name = "foo", kind = "static")]`).
4163 * Native OS X frameworks are now officially supported
4164 (`#[link(name = "foo", kind = "framework")]`).
4165 * The `#[thread_local]` attribute creates thread-local (not task-local)
4166 variables. Currently behind the `thread_local` feature gate.
4167 * The `return` keyword may be used in closures.
4168 * Types that can be copied via a memcpy implement the `Pod` kind.
4169 * The `cfg` attribute can now be used on struct fields and enum variants.
4172 * std: The `option` and `result` API's have been overhauled to make them
4173 simpler, more consistent, and more composable.
4174 * std: The entire `std::io` module has been replaced with one that is
4175 more comprehensive and that properly interfaces with the underlying
4176 scheduler. File, TCP, UDP, Unix sockets, pipes, and timers are all
4178 * std: `io::util` contains a number of useful implementations of
4179 `Reader` and `Writer`, including `NullReader`, `NullWriter`,
4180 `ZeroReader`, `TeeReader`.
4181 * std: The reference counted pointer type `extra::rc` moved into std.
4182 * std: The `Gc` type in the `gc` module will replace `@` (it is currently
4183 just a wrapper around it).
4184 * std: The `Either` type has been removed.
4185 * std: `fmt::Default` can be implemented for any type to provide default
4186 formatting to the `format!` macro, as in `format!("{}", myfoo)`.
4187 * std: The `rand` API continues to be tweaked.
4188 * std: The `rust_begin_unwind` function, useful for inserting breakpoints
4189 on failure in gdb, is now named `rust_fail`.
4190 * std: The `each_key` and `each_value` methods on `HashMap` have been
4191 replaced by the `keys` and `values` iterators.
4192 * std: Functions dealing with type size and alignment have moved from the
4193 `sys` module to the `mem` module.
4194 * std: The `path` module was written and API changed.
4195 * std: `str::from_utf8` has been changed to cast instead of allocate.
4196 * std: `starts_with` and `ends_with` methods added to vectors via the
4197 `ImmutableEqVector` trait, which is in the prelude.
4198 * std: Vectors can be indexed with the `get_opt` method, which returns `None`
4199 if the index is out of bounds.
4200 * std: Task failure no longer propagates between tasks, as the model was
4201 complex, expensive, and incompatible with thread-based tasks.
4202 * std: The `Any` type can be used for dynamic typing.
4203 * std: `~Any` can be passed to the `fail!` macro and retrieved via
4205 * std: Methods that produce iterators generally do not have an `_iter`
4207 * std: `cell::Cell` and `cell::RefCell` can be used to introduce mutability
4208 roots (mutable fields, etc.). Use instead of e.g. `@mut`.
4209 * std: `util::ignore` renamed to `prelude::drop`.
4210 * std: Slices have `sort` and `sort_by` methods via the `MutableVector`
4212 * std: `vec::raw` has seen a lot of cleanup and API changes.
4213 * std: The standard library no longer includes any C++ code, and very
4214 minimal C, eliminating the dependency on libstdc++.
4215 * std: Runtime scheduling and I/O functionality has been factored out into
4216 extensible interfaces and is now implemented by two different crates:
4217 libnative, for native threading and I/O; and libgreen, for green threading
4218 and I/O. This paves the way for using the standard library in more limited
4219 embedded environments.
4220 * std: The `comm` module has been rewritten to be much faster, have a
4221 simpler, more consistent API, and to work for both native and green
4223 * std: All libuv dependencies have been moved into the rustuv crate.
4224 * native: New implementations of runtime scheduling on top of OS threads.
4225 * native: New native implementations of TCP, UDP, file I/O, process spawning,
4227 * green: The green thread scheduler and message passing types are almost
4229 * extra: The `flatpipes` module had bitrotted and was removed.
4230 * extra: All crypto functions have been removed and Rust now has a policy of
4231 not reimplementing crypto in the standard library. In the future crypto
4232 will be provided by external crates with bindings to established libraries.
4233 * extra: `c_vec` has been modernized.
4234 * extra: The `sort` module has been removed. Use the `sort` method on
4238 * The `rust` and `rusti` commands have been removed, due to lack of
4240 * `rustdoc` was completely rewritten.
4241 * `rustdoc` can test code examples in documentation.
4242 * `rustpkg` can test packages with the argument, 'test'.
4243 * `rustpkg` supports arbitrary dependencies, including C libraries.
4244 * `rustc`'s support for generating debug info is improved again.
4245 * `rustc` has better error reporting for unbalanced delimiters.
4246 * `rustc`'s JIT support was removed due to bitrot.
4247 * Executables and static libraries can be built with LTO (-Z lto)
4248 * `rustc` adds a `--dep-info` flag for communicating dependencies to
4252 Version 0.8 (2013-09-26)
4253 ============================
4255 * ~2200 changes, numerous bugfixes
4258 * The `for` loop syntax has changed to work with the `Iterator` trait.
4259 * At long last, unwinding works on Windows.
4260 * Default methods are ready for use.
4261 * Many trait inheritance bugs fixed.
4262 * Owned and borrowed trait objects work more reliably.
4263 * `copy` is no longer a keyword. It has been replaced by the `Clone` trait.
4264 * rustc can omit emission of code for the `debug!` macro if it is passed
4266 * mod.rs is now "blessed". When loading `mod foo;`, rustc will now look
4267 for foo.rs, then foo/mod.rs, and will generate an error when both are
4269 * Strings no longer contain trailing nulls. The new `std::c_str` module
4270 provides new mechanisms for converting to C strings.
4271 * The type of foreign functions is now `extern "C" fn` instead of `*u8'.
4272 * The FFI has been overhauled such that foreign functions are called directly,
4273 instead of through a stack-switching wrapper.
4274 * Calling a foreign function must be done through a Rust function with the
4275 `#[fixed_stack_segment]` attribute.
4276 * The `externfn!` macro can be used to declare both a foreign function and
4277 a `#[fixed_stack_segment]` wrapper at once.
4278 * `pub` and `priv` modifiers on `extern` blocks are no longer parsed.
4279 * `unsafe` is no longer allowed on extern fns - they are all unsafe.
4280 * `priv` is disallowed everywhere except for struct fields and enum variants.
4281 * `&T` (besides `&'static T`) is no longer allowed in `@T`.
4282 * `ref` bindings in irrefutable patterns work correctly now.
4283 * `char` is now prevented from containing invalid code points.
4284 * Casting to `bool` is no longer allowed.
4285 * `\0` is now accepted as an escape in chars and strings.
4286 * `yield` is a reserved keyword.
4287 * `typeof` is a reserved keyword.
4288 * Crates may be imported by URL with `extern mod foo = "url";`.
4289 * Explicit enum discriminants may be given as uints as in `enum E { V = 0u }`
4290 * Static vectors can be initialized with repeating elements,
4291 e.g. `static foo: [u8, .. 100]: [0, .. 100];`.
4292 * Static structs can be initialized with functional record update,
4293 e.g. `static foo: Foo = Foo { a: 5, .. bar };`.
4294 * `cfg!` can be used to conditionally execute code based on the crate
4295 configuration, similarly to `#[cfg(...)]`.
4296 * The `unnecessary_qualification` lint detects unneeded module
4297 prefixes (default: allow).
4298 * Arithmetic operations have been implemented on the SIMD types in
4299 `std::unstable::simd`.
4300 * Exchange allocation headers were removed, reducing memory usage.
4301 * `format!` implements a completely new, extensible, and higher-performance
4302 string formatting system. It will replace `fmt!`.
4303 * `print!` and `println!` write formatted strings (using the `format!`
4304 extension) to stdout.
4305 * `write!` and `writeln!` write formatted strings (using the `format!`
4306 extension) to the new Writers in `std::rt::io`.
4307 * The library section in which a function or static is placed may
4308 be specified with `#[link_section = "..."]`.
4309 * The `proto!` syntax extension for defining bounded message protocols
4311 * `macro_rules!` is hygienic for `let` declarations.
4312 * The `#[export_name]` attribute specifies the name of a symbol.
4313 * `unreachable!` can be used to indicate unreachable code, and fails
4317 * std: Transitioned to the new runtime, written in Rust.
4318 * std: Added an experimental I/O library, `rt::io`, based on the new
4320 * std: A new generic `range` function was added to the prelude, replacing
4321 `uint::range` and friends.
4322 * std: `range_rev` no longer exists. Since range is an iterator it can be
4323 reversed with `range(lo, hi).invert()`.
4324 * std: The `chain` method on option renamed to `and_then`; `unwrap_or_default`
4325 renamed to `unwrap_or`.
4326 * std: The `iterator` module was renamed to `iter`.
4327 * std: Integral types now support the `checked_add`, `checked_sub`, and
4328 `checked_mul` operations for detecting overflow.
4329 * std: Many methods in `str`, `vec`, `option, `result` were renamed for
4331 * std: Methods are standardizing on conventions for casting methods:
4332 `to_foo` for copying, `into_foo` for moving, `as_foo` for temporary
4334 * std: The `CString` type in `c_str` provides new ways to convert to and
4336 * std: `DoubleEndedIterator` can yield elements in two directions.
4337 * std: The `mut_split` method on vectors partitions an `&mut [T]` into
4339 * std: `str::from_bytes` renamed to `str::from_utf8`.
4340 * std: `pop_opt` and `shift_opt` methods added to vectors.
4341 * std: The task-local data interface no longer uses @, and keys are
4342 no longer function pointers.
4343 * std: The `swap_unwrap` method of `Option` renamed to `take_unwrap`.
4344 * std: Added `SharedPort` to `comm`.
4345 * std: `Eq` has a default method for `ne`; only `eq` is required
4347 * std: `Ord` has default methods for `le`, `gt` and `ge`; only `lt`
4348 is required in implementations.
4349 * std: `is_utf8` performance is improved, impacting many string functions.
4350 * std: `os::MemoryMap` provides cross-platform mmap.
4351 * std: `ptr::offset` is now unsafe, but also more optimized. Offsets that
4352 are not 'in-bounds' are considered undefined.
4353 * std: Many freestanding functions in `vec` removed in favor of methods.
4354 * std: Many freestanding functions on scalar types removed in favor of
4356 * std: Many options to task builders were removed since they don't make
4357 sense in the new scheduler design.
4358 * std: More containers implement `FromIterator` so can be created by the
4360 * std: More complete atomic types in `unstable::atomics`.
4361 * std: `comm::PortSet` removed.
4362 * std: Mutating methods in the `Set` and `Map` traits have been moved into
4363 the `MutableSet` and `MutableMap` traits. `Container::is_empty`,
4364 `Map::contains_key`, `MutableMap::insert`, and `MutableMap::remove` have
4365 default implementations.
4366 * std: Various `from_str` functions were removed in favor of a generic
4367 `from_str` which is available in the prelude.
4368 * std: `util::unreachable` removed in favor of the `unreachable!` macro.
4369 * extra: `dlist`, the doubly-linked list was modernized.
4370 * extra: Added a `hex` module with `ToHex` and `FromHex` traits.
4371 * extra: Added `glob` module, replacing `std::os::glob`.
4372 * extra: `rope` was removed.
4373 * extra: `deque` was renamed to `ringbuf`. `RingBuf` implements `Deque`.
4374 * extra: `net`, and `timer` were removed. The experimental replacements
4375 are `std::rt::io::net` and `std::rt::io::timer`.
4376 * extra: Iterators implemented for `SmallIntMap`.
4377 * extra: Iterators implemented for `Bitv` and `BitvSet`.
4378 * extra: `SmallIntSet` removed. Use `BitvSet`.
4379 * extra: Performance of JSON parsing greatly improved.
4380 * extra: `semver` updated to SemVer 2.0.0.
4381 * extra: `term` handles more terminals correctly.
4382 * extra: `dbg` module removed.
4383 * extra: `par` module removed.
4384 * extra: `future` was cleaned up, with some method renames.
4385 * extra: Most free functions in `getopts` were converted to methods.
4388 * rustc's debug info generation (`-Z debug-info`) is greatly improved.
4389 * rustc accepts `--target-cpu` to compile to a specific CPU architecture,
4390 similarly to gcc's `--march` flag.
4391 * rustc's performance compiling small crates is much better.
4392 * rustpkg has received many improvements.
4393 * rustpkg supports git tags as package IDs.
4394 * rustpkg builds into target-specific directories so it can be used for
4396 * The number of concurrent test tasks is controlled by the environment
4397 variable RUST_TEST_TASKS.
4398 * The test harness can now report metrics for benchmarks.
4399 * All tools have man pages.
4400 * Programs compiled with `--test` now support the `-h` and `--help` flags.
4401 * The runtime uses jemalloc for allocations.
4402 * Segmented stacks are temporarily disabled as part of the transition to
4403 the new runtime. Stack overflows are possible!
4404 * A new documentation backend, rustdoc_ng, is available for use. It is
4405 still invoked through the normal `rustdoc` command.
4408 Version 0.7 (2013-07-03)
4409 =======================
4411 * ~2000 changes, numerous bugfixes
4414 * `impl`s no longer accept a visibility qualifier. Put them on methods
4416 * The borrow checker has been rewritten with flow-sensitivity, fixing
4417 many bugs and inconveniences.
4418 * The `self` parameter no longer implicitly means `&'self self`,
4419 and can be explicitly marked with a lifetime.
4420 * Overloadable compound operators (`+=`, etc.) have been temporarily
4421 removed due to bugs.
4422 * The `for` loop protocol now requires `for`-iterators to return `bool`
4423 so they compose better.
4424 * The `Durable` trait is replaced with the `'static` bounds.
4425 * Trait default methods work more often.
4426 * Structs with the `#[packed]` attribute have byte alignment and
4427 no padding between fields.
4428 * Type parameters bound by `Copy` must now be copied explicitly with
4430 * It is now illegal to move out of a dereferenced unsafe pointer.
4431 * `Option<~T>` is now represented as a nullable pointer.
4432 * `@mut` does dynamic borrow checks correctly.
4433 * The `main` function is only detected at the topmost level of the crate.
4434 The `#[main]` attribute is still valid anywhere.
4435 * Struct fields may no longer be mutable. Use inherited mutability.
4436 * The `#[no_send]` attribute makes a type that would otherwise be
4438 * The `#[no_freeze]` attribute makes a type that would otherwise be
4440 * Unbounded recursion will abort the process after reaching the limit
4441 specified by the `RUST_MAX_STACK` environment variable (default: 1GB).
4442 * The `vecs_implicitly_copyable` lint mode has been removed. Vectors
4443 are never implicitly copyable.
4444 * `#[static_assert]` makes compile-time assertions about static bools.
4445 * At long last, 'argument modes' no longer exist.
4446 * The rarely used `use mod` statement no longer exists.
4449 * `fail!` and `assert!` accept `~str`, `&'static str` or `fmt!`-style
4451 * `Encodable`, `Decodable`, `Ord`, `TotalOrd`, `TotalEq`, `DeepClone`,
4452 `Rand`, `Zero` and `ToStr` can all be automatically derived with
4454 * The `bytes!` macro returns a vector of bytes for string, u8, char,
4455 and unsuffixed integer literals.
4458 * The `core` crate was renamed to `std`.
4459 * The `std` crate was renamed to `extra`.
4460 * More and improved documentation.
4461 * std: `iterator` module for external iterator objects.
4462 * Many old-style (internal, higher-order function) iterators replaced by
4463 implementations of `Iterator`.
4464 * std: Many old internal vector and string iterators,
4465 incl. `any`, `all`. removed.
4466 * std: The `finalize` method of `Drop` renamed to `drop`.
4467 * std: The `drop` method now takes `&mut self` instead of `&self`.
4468 * std: The prelude no longer reexports any modules, only types and traits.
4469 * std: Prelude additions: `print`, `println`, `FromStr`, `ApproxEq`, `Equiv`,
4470 `Iterator`, `IteratorUtil`, many numeric traits, many tuple traits.
4471 * std: New numeric traits: `Fractional`, `Real`, `RealExt`, `Integer`, `Ratio`,
4472 `Algebraic`, `Trigonometric`, `Exponential`, `Primitive`.
4473 * std: Tuple traits and accessors defined for up to 12-tuples, e.g.
4474 `(0, 1, 2).n2()` or `(0, 1, 2).n2_ref()`.
4475 * std: Many types implement `Clone`.
4476 * std: `path` type renamed to `Path`.
4477 * std: `mut` module and `Mut` type removed.
4478 * std: Many standalone functions removed in favor of methods and iterators
4479 in `vec`, `str`. In the future methods will also work as functions.
4480 * std: `reinterpret_cast` removed. Use `transmute`.
4481 * std: ascii string handling in `std::ascii`.
4482 * std: `Rand` is implemented for ~/@.
4483 * std: `run` module for spawning processes overhauled.
4484 * std: Various atomic types added to `unstable::atomic`.
4485 * std: Various types implement `Zero`.
4486 * std: `LinearMap` and `LinearSet` renamed to `HashMap` and `HashSet`.
4487 * std: Borrowed pointer functions moved from `ptr` to `borrow`.
4488 * std: Added `os::mkdir_recursive`.
4489 * std: Added `os::glob` function performs filesystems globs.
4490 * std: `FuzzyEq` renamed to `ApproxEq`.
4491 * std: `Map` now defines `pop` and `swap` methods.
4492 * std: `Cell` constructors converted to static methods.
4493 * extra: `rc` module adds the reference counted pointers, `Rc` and `RcMut`.
4494 * extra: `flate` module moved from `std` to `extra`.
4495 * extra: `fileinput` module for iterating over a series of files.
4496 * extra: `Complex` number type and `complex` module.
4497 * extra: `Rational` number type and `rational` module.
4498 * extra: `BigInt`, `BigUint` implement numeric and comparison traits.
4499 * extra: `term` uses terminfo now, is more correct.
4500 * extra: `arc` functions converted to methods.
4501 * extra: Implementation of fixed output size variations of SHA-2.
4504 * `unused_variable` lint mode for unused variables (default: warn).
4505 * `unused_unsafe` lint mode for detecting unnecessary `unsafe` blocks
4507 * `unused_mut` lint mode for identifying unused `mut` qualifiers
4509 * `dead_assignment` lint mode for unread variables (default: warn).
4510 * `unnecessary_allocation` lint mode detects some heap allocations that are
4511 immediately borrowed so could be written without allocating (default: warn).
4512 * `missing_doc` lint mode (default: allow).
4513 * `unreachable_code` lint mode (default: warn).
4514 * The `rusti` command has been rewritten and a number of bugs addressed.
4515 * rustc outputs in color on more terminals.
4516 * rustc accepts a `--link-args` flag to pass arguments to the linker.
4517 * rustc accepts a `-Z print-link-args` flag for debugging linkage.
4518 * Compiling with `-g` will make the binary record information about
4519 dynamic borrowcheck failures for debugging.
4520 * rustdoc has a nicer stylesheet.
4521 * Various improvements to rustdoc.
4522 * Improvements to rustpkg (see the detailed release notes).
4525 Version 0.6 (2013-04-03)
4526 ========================
4528 * ~2100 changes, numerous bugfixes
4531 * The self type parameter in traits is now spelled `Self`
4532 * The `self` parameter in trait and impl methods must now be explicitly
4533 named (for example: `fn f(&self) { }`). Implicit self is deprecated.
4534 * Static methods no longer require the `static` keyword and instead
4535 are distinguished by the lack of a `self` parameter
4536 * Replaced the `Durable` trait with the `'static` lifetime
4537 * The old closure type syntax with the trailing sigil has been
4538 removed in favor of the more consistent leading sigil
4539 * `super` is a keyword, and may be prefixed to paths
4540 * Trait bounds are separated with `+` instead of whitespace
4541 * Traits are implemented with `impl Trait for Type`
4542 instead of `impl Type: Trait`
4543 * Lifetime syntax is now `&'l foo` instead of `&l/foo`
4544 * The `export` keyword has finally been removed
4545 * The `move` keyword has been removed (see "Semantic changes")
4546 * The interior mutability qualifier on vectors, `[mut T]`, has been
4547 removed. Use `&mut [T]`, etc.
4548 * `mut` is no longer valid in `~mut T`. Use inherited mutability
4549 * `fail` is no longer a keyword. Use `fail!()`
4550 * `assert` is no longer a keyword. Use `assert!()`
4551 * `log` is no longer a keyword. use `debug!`, etc.
4552 * 1-tuples may be represented as `(T,)`
4553 * Struct fields may no longer be `mut`. Use inherited mutability,
4554 `@mut T`, `core::mut` or `core::cell`
4555 * `extern mod { ... }` is no longer valid syntax for foreign
4556 function modules. Use extern blocks: `extern { ... }`
4557 * Newtype enums removed. Use tuple-structs.
4558 * Trait implementations no longer support visibility modifiers
4559 * Pattern matching over vectors improved and expanded
4560 * `const` renamed to `static` to correspond to lifetime name,
4561 and make room for future `static mut` unsafe mutable globals.
4562 * Replaced `#[deriving_eq]` with `#[deriving(Eq)]`, etc.
4563 * `Clone` implementations can be automatically generated with
4564 `#[deriving(Clone)]`
4565 * Casts to traits must use a pointer sigil, e.g. `@foo as @Bar`
4566 instead of `foo as Bar`.
4567 * Fixed length vector types are now written as `[int, .. 3]`
4568 instead of `[int * 3]`.
4569 * Fixed length vector types can express the length as a constant
4570 expression. (ex: `[int, .. GL_BUFFER_SIZE - 2]`)
4573 * Types with owned pointers or custom destructors move by default,
4574 eliminating the `move` keyword
4575 * All foreign functions are considered unsafe
4576 * &mut is now unaliasable
4577 * Writes to borrowed @mut pointers are prevented dynamically
4579 * The name of the main function can be customized using #[main]
4580 * The default type of an inferred closure is &fn instead of @fn
4581 * `use` statements may no longer be "chained" - they cannot import
4582 identifiers imported by previous `use` statements
4583 * `use` statements are crate relative, importing from the "top"
4584 of the crate by default. Paths may be prefixed with `super::`
4585 or `self::` to change the search behavior.
4586 * Method visibility is inherited from the implementation declaration
4587 * Structural records have been removed
4588 * Many more types can be used in static items, including enums
4589 'static-lifetime pointers and vectors
4590 * Pattern matching over vectors improved and expanded
4591 * Typechecking of closure types has been overhauled to
4592 improve inference and eliminate unsoundness
4593 * Macros leave scope at the end of modules, unless that module is
4594 tagged with #[macro_escape]
4597 * Added big integers to `std::bigint`
4598 * Removed `core::oldcomm` module
4599 * Added pipe-based `core::comm` module
4600 * Numeric traits have been reorganized under `core::num`
4601 * `vec::slice` finally returns a slice
4602 * `debug!` and friends don't require a format string, e.g. `debug!(Foo)`
4603 * Containers reorganized around traits in `core::container`
4604 * `core::dvec` removed, `~[T]` is a drop-in replacement
4605 * `core::send_map` renamed to `core::hashmap`
4606 * `std::map` removed; replaced with `core::hashmap`
4607 * `std::treemap` reimplemented as an owned balanced tree
4608 * `std::deque` and `std::smallintmap` reimplemented as owned containers
4609 * `core::trie` added as a fast ordered map for integer keys
4610 * Set types added to `core::hashmap`, `core::trie` and `std::treemap`
4611 * `Ord` split into `Ord` and `TotalOrd`. `Ord` is still used to
4612 overload the comparison operators, whereas `TotalOrd` is used
4613 by certain container types
4616 * Replaced the 'cargo' package manager with 'rustpkg'
4617 * Added all-purpose 'rust' tool
4618 * `rustc --test` now supports benchmarks with the `#[bench]` attribute
4619 * rustc now *attempts* to offer spelling suggestions
4620 * Improved support for ARM and Android
4621 * Preliminary MIPS backend
4622 * Improved foreign function ABI implementation for x86, x86_64
4623 * Various memory usage improvements
4624 * Rust code may be embedded in foreign code under limited circumstances
4625 * Inline assembler supported by new asm!() syntax extension.
4628 Version 0.5 (2012-12-21)
4629 ===========================
4631 * ~900 changes, numerous bugfixes
4634 * Removed `<-` move operator
4635 * Completed the transition from the `#fmt` extension syntax to `fmt!`
4636 * Removed old fixed length vector syntax - `[T]/N`
4637 * New token-based quasi-quoters, `quote_tokens!`, `quote_expr!`, etc.
4638 * Macros may now expand to items and statements
4639 * `a.b()` is always parsed as a method call, never as a field projection
4640 * `Eq` and `IterBytes` implementations can be automatically generated
4641 with `#[deriving_eq]` and `#[deriving_iter_bytes]` respectively
4642 * Removed the special crate language for `.rc` files
4643 * Function arguments may consist of any irrefutable pattern
4646 * `&` and `~` pointers may point to objects
4647 * Tuple structs - `struct Foo(Bar, Baz)`. Will replace newtype enums.
4648 * Enum variants may be structs
4649 * Destructors can be added to all nominal types with the Drop trait
4650 * Structs and nullary enum variants may be constants
4651 * Values that cannot be implicitly copied are now automatically moved
4652 without writing `move` explicitly
4653 * `&T` may now be coerced to `*T`
4654 * Coercions happen in `let` statements as well as function calls
4655 * `use` statements now take crate-relative paths
4656 * The module and type namespaces have been merged so that static
4657 method names can be resolved under the trait in which they are
4660 * Improved support for language features
4661 * Trait inheritance works in many scenarios
4662 * More support for explicit self arguments in methods - `self`, `&self`
4663 `@self`, and `~self` all generally work as expected
4664 * Static methods work in more situations
4665 * Experimental: Traits may declare default methods for the implementations
4669 * New condition handling system in `core::condition`
4670 * Timsort added to `std::sort`
4671 * New priority queue, `std::priority_queue`
4672 * Pipes for serializable types, `std::flatpipes'
4673 * Serialization overhauled to be trait-based
4674 * Expanded `getopts` definitions
4675 * Moved futures to `std`
4676 * More functions are pure now
4677 * `core::comm` renamed to `oldcomm`. Still deprecated
4678 * `rustdoc` and `cargo` are libraries now
4681 * Added a preliminary REPL, `rusti`
4682 * License changed from MIT to dual MIT/APL2
4685 Version 0.4 (2012-10-15)
4686 ==========================
4688 * ~2000 changes, numerous bugfixes
4691 * All keywords are now strict and may not be used as identifiers anywhere
4692 * Keyword removal: 'again', 'import', 'check', 'new', 'owned', 'send',
4693 'of', 'with', 'to', 'class'.
4694 * Classes are replaced with simpler structs
4695 * Explicit method self types
4696 * `ret` became `return` and `alt` became `match`
4697 * `import` is now `use`; `use is now `extern mod`
4698 * `extern mod { ... }` is now `extern { ... }`
4699 * `use mod` is the recommended way to import modules
4700 * `pub` and `priv` replace deprecated export lists
4701 * The syntax of `match` pattern arms now uses fat arrow (=>)
4702 * `main` no longer accepts an args vector; use `os::args` instead
4705 * Trait implementations are now coherent, ala Haskell typeclasses
4706 * Trait methods may be static
4707 * Argument modes are deprecated
4708 * Borrowed pointers are much more mature and recommended for use
4709 * Strings and vectors in the static region are stored in constant memory
4710 * Typestate was removed
4711 * Resolution rewritten to be more reliable
4712 * Support for 'dual-mode' data structures (freezing and thawing)
4715 * Most binary operators can now be overloaded via the traits in
4717 * `std::net::url` for representing URLs
4718 * Sendable hash maps in `core::send_map`
4719 * `core::task' gained a (currently unsafe) task-local storage API
4722 * An efficient new intertask communication primitive called the pipe,
4723 along with a number of higher-level channel types, in `core::pipes`
4724 * `std::arc`, an atomically reference counted, immutable, shared memory
4726 * `std::sync`, various exotic synchronization tools based on arcs and pipes
4727 * Futures are now based on pipes and sendable
4728 * More robust linked task failure
4729 * Improved task builder API
4732 * Improved error reporting
4733 * Preliminary JIT support
4734 * Preliminary work on precise GC
4735 * Extensive architectural improvements to rustc
4736 * Begun a transition away from buggy C++-based reflection (shape) code to
4737 Rust-based (visitor) code
4738 * All hash functions and tables converted to secure, randomized SipHash
4741 Version 0.3 (2012-07-12)
4742 ========================
4744 * ~1900 changes, numerous bugfixes
4746 * New coding conveniences
4747 * Integer-literal suffix inference
4748 * Per-item control over warnings, errors
4749 * #[cfg(windows)] and #[cfg(unix)] attributes
4750 * Documentation comments
4751 * More compact closure syntax
4752 * 'do' expressions for treating higher-order functions as
4754 * *-patterns (wildcard extended to all constructor fields)
4757 * Name resolution pass and exhaustiveness checker rewritten
4758 * Region pointers and borrow checking supersede alias
4760 * Init-ness checking is now provided by a region-based liveness
4761 pass instead of the typestate pass; same for last-use analysis
4762 * Extensive work on region pointers
4764 * Experimental new language features
4765 * Slices and fixed-size, interior-allocated vectors
4766 * #!-comments for lang versioning, shell execution
4767 * Destructors and iface implementation for classes;
4768 type-parameterized classes and class methods
4769 * 'const' type kind for types that can be used to implement
4770 shared-memory concurrency patterns
4774 * Removal of various obsolete features
4775 * Keywords: 'be', 'prove', 'syntax', 'note', 'mutable', 'bind',
4776 'crust', 'native' (now 'extern'), 'cont' (now 'again')
4778 * Constructs: do-while loops ('do' repurposed), fn binding,
4779 resources (replaced by destructors)
4781 * Compiler reorganization
4782 * Syntax-layer of compiler split into separate crate
4783 * Clang (from LLVM project) integrated into build
4784 * Typechecker split into sub-modules
4787 * New time functions
4788 * Extension methods for many built-in types
4789 * Arc: atomic-refcount read-only / exclusive-use shared cells
4790 * Par: parallel map and search routines
4791 * Extensive work on libuv interface
4792 * Much vector code moved to libraries
4793 * Syntax extensions: #line, #col, #file, #mod, #stringify,
4794 #include, #include_str, #include_bin
4797 * Cargo automatically resolves dependencies
4800 Version 0.2 (2012-03-29)
4801 =========================
4803 * >1500 changes, numerous bugfixes
4805 * New docs and doc tooling
4807 * New port: FreeBSD x86_64
4809 * Compilation model enhancements
4810 * Generics now specialized, multiply instantiated
4811 * Functions now inlined across separate crates
4813 * Scheduling, stack and threading fixes
4814 * Noticeably improved message-passing performance
4815 * Explicit schedulers
4819 * Experimental new language features
4820 * Operator overloading
4824 * Various language extensions
4825 * C-callback function types: 'crust fn ...'
4826 * Infinite-loop construct: 'loop { ... }'
4827 * Shorten 'mutable' to 'mut'
4828 * Required mutable-local qualifier: 'let mut ...'
4829 * Basic glob-exporting: 'export foo::*;'
4830 * Alt now exhaustive, 'alt check' for runtime-checked
4831 * Block-function form of 'for' loop, with 'break' and 'ret'.
4834 * AST quasi-quote syntax extension
4835 * Revived libuv interface
4836 * New modules: core::{future, iter}, std::arena
4837 * Merged per-platform std::{os*, fs*} to core::{libc, os}
4838 * Extensive cleanup, regularization in libstd, libcore
4841 Version 0.1 (2012-01-20)
4842 ===============================
4844 * Most language features work, including:
4845 * Unique pointers, unique closures, move semantics
4846 * Interface-constrained generics
4847 * Static interface dispatch
4849 * Multithread task scheduling
4850 * Typestate predicates
4851 * Failure unwinding, destructors
4852 * Pattern matching and destructuring assignment
4853 * Lightweight block-lambda syntax
4854 * Preliminary macro-by-example
4856 * Compiler works with the following configurations:
4857 * Linux: x86 and x86_64 hosts and targets
4858 * MacOS: x86 and x86_64 hosts and targets
4859 * Windows: x86 hosts and targets
4861 * Cross compilation / multi-target configuration supported.
4863 * Preliminary API-documentation and package-management tools included.
4867 * Documentation is incomplete.
4869 * Performance is below intended target.
4871 * Standard library APIs are subject to extensive change, reorganization.
4873 * Language-level versioning is not yet operational - future code will