1 Version 1.16.0 (2017-03-16)
2 ===========================
7 * Lifetimes in statics and consts default to `'static`. [RFC 1623]
8 * [The compiler's `dead_code` lint now accounts for type aliases][38051].
9 * [Uninhabitable enums (those without any variants) no longer permit wildcard
10 match patterns][38069]
11 * [Clean up semantics of `self` in an import list][38313]
12 * [`Self` may appear in `impl` headers][38920]
13 * [`Self` may appear in struct expressions][39282]
18 * [`rustc` now supports `--emit=metadata`, which causes rustc to emit
19 a `.rmeta` file containing only crate metadata][38571]. This can be
20 used by tools like the Rust Language Service to perform
22 * [Levenshtein based typo suggestions now work in most places, while
23 previously they worked only for fields and sometimes for local
24 variables][38927]. Together with the overhaul of "no
25 resolution"/"unexpected resolution" errors (#[38154]) they result in
26 large and systematic improvement in resolution diagnostics.
27 * [Fix `transmute::<T, U>` where `T` requires a bigger alignment than
29 * [rustc: use -Xlinker when specifying an rpath with ',' in it][38798]
30 * [`rustc` no longer attempts to provide "consider using an explicit
31 lifetime" suggestions][37057]. They were inaccurate.
36 * [`VecDeque::truncate`]
37 * [`VecDeque::resize`]
38 * [`String::insert_str`]
39 * [`Duration::checked_add`]
40 * [`Duration::checked_sub`]
41 * [`Duration::checked_div`]
42 * [`Duration::checked_mul`]
45 * [`SocketAddr::is_ipv4`]
46 * [`SocketAddr::is_ipv6`]
50 * [`Vec::dedup_by_key`]
51 * [`Result::unwrap_or_default`]
52 * [`<*const T>::wrapping_offset`]
53 * [`<*mut T>::wrapping_offset`]
54 * `CommandExt::creation_flags`
55 * [`File::set_permissions`]
56 * [`String::split_off`]
61 * [`[T]::binary_search` and `[T]::binary_search_by_key` now take
62 their argument by `Borrow` parameter][37761]
63 * [All public types in std implement `Debug`][38006]
64 * [`IpAddr` implements `From<Ipv4Addr>` and `From<Ipv6Addr>`][38327]
65 * [`Ipv6Addr` implements `From<[u16; 8]>`][38131]
66 * [Ctrl-Z returns from `Stdin.read()` when reading from the console on
68 * [std: Fix partial writes in `LineWriter`][38062]
69 * [std: Clamp max read/write sizes on Unix][38062]
70 * [Use more specific panic message for `&str` slicing errors][38066]
71 * [`TcpListener::set_only_v6` is deprecated][38304]. This
72 functionality cannot be achieved in std currently.
73 * [`writeln!`, like `println!`, now accepts a form with no string
74 or formatting arguments, to just print a newline][38469]
75 * [Implement `iter::Sum` and `iter::Product` for `Result`][38580]
76 * [Reduce the size of static data in `std_unicode::tables`][38781]
77 * [`char::EscapeDebug`, `EscapeDefault`, `EscapeUnicode`,
78 `CaseMappingIter`, `ToLowercase`, `ToUppercase`, implement
80 * [`Duration` implements `Sum`][38712]
81 * [`String` implements `ToSocketAddrs`][39048]
86 * [The `cargo check` command does a type check of a project without
87 building it][cargo/3296]
88 * [crates.io will display CI badges from Travis and AppVeyor, if
89 specified in Cargo.toml][cargo/3546]
90 * [crates.io will display categories listed in Cargo.toml][cargo/3301]
91 * [Compilation profiles accept integer values for `debug`, in addition
92 to `true` and `false`. These are passed to `rustc` as the value to
93 `-C debuginfo`][cargo/3534]
94 * [Implement `cargo --version --verbose`][cargo/3604]
95 * [All builds now output 'dep-info' build dependencies compatible with
96 make and ninja][cargo/3557]
97 * [Build all workspace members with `build --all`][cargo/3511]
98 * [Document all workspace members with `doc --all`][cargo/3515]
99 * [Path deps outside workspace are not members][cargo/3443]
104 * [`rustdoc` has a `--sysroot` argument that, like `rustc`, specifies
105 the path to the Rust implementation][38589]
106 * [The `armv7-linux-androideabi` target no longer enables NEON
107 extensions, per Google's ABI guide][38413]
108 * [The stock standard library can be compiled for Redox OS][38401]
109 * [Rust has initial SPARC support][38726]. Tier 3. No builds
111 * [Rust has experimental support for Nvidia PTX][38559]. Tier 3. No
113 * [Fix backtraces on i686-pc-windows-gnu by disabling FPO][39379]
118 * [Uninhabitable enums (those without any variants) no longer permit wildcard
119 match patterns][38069]
120 * In this release, references to uninhabited types can not be
121 pattern-matched. This was accidentally allowed in 1.15.
122 * [The compiler's `dead_code` lint now accounts for type aliases][38051].
123 * [Ctrl-Z returns from `Stdin.read()` when reading from the console on
125 * [Clean up semantics of `self` in an import list][38313]
127 [37057]: https://github.com/rust-lang/rust/pull/37057
128 [37761]: https://github.com/rust-lang/rust/pull/37761
129 [38006]: https://github.com/rust-lang/rust/pull/38006
130 [38051]: https://github.com/rust-lang/rust/pull/38051
131 [38062]: https://github.com/rust-lang/rust/pull/38062
132 [38062]: https://github.com/rust-lang/rust/pull/38622
133 [38066]: https://github.com/rust-lang/rust/pull/38066
134 [38069]: https://github.com/rust-lang/rust/pull/38069
135 [38131]: https://github.com/rust-lang/rust/pull/38131
136 [38154]: https://github.com/rust-lang/rust/pull/38154
137 [38274]: https://github.com/rust-lang/rust/pull/38274
138 [38304]: https://github.com/rust-lang/rust/pull/38304
139 [38313]: https://github.com/rust-lang/rust/pull/38313
140 [38314]: https://github.com/rust-lang/rust/pull/38314
141 [38327]: https://github.com/rust-lang/rust/pull/38327
142 [38401]: https://github.com/rust-lang/rust/pull/38401
143 [38413]: https://github.com/rust-lang/rust/pull/38413
144 [38469]: https://github.com/rust-lang/rust/pull/38469
145 [38559]: https://github.com/rust-lang/rust/pull/38559
146 [38571]: https://github.com/rust-lang/rust/pull/38571
147 [38580]: https://github.com/rust-lang/rust/pull/38580
148 [38589]: https://github.com/rust-lang/rust/pull/38589
149 [38670]: https://github.com/rust-lang/rust/pull/38670
150 [38712]: https://github.com/rust-lang/rust/pull/38712
151 [38726]: https://github.com/rust-lang/rust/pull/38726
152 [38781]: https://github.com/rust-lang/rust/pull/38781
153 [38798]: https://github.com/rust-lang/rust/pull/38798
154 [38909]: https://github.com/rust-lang/rust/pull/38909
155 [38920]: https://github.com/rust-lang/rust/pull/38920
156 [38927]: https://github.com/rust-lang/rust/pull/38927
157 [39048]: https://github.com/rust-lang/rust/pull/39048
158 [39282]: https://github.com/rust-lang/rust/pull/39282
159 [39379]: https://github.com/rust-lang/rust/pull/39379
160 [`<*const T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset
161 [`<*mut T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset
162 [`Duration::checked_add`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_add
163 [`Duration::checked_div`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_div
164 [`Duration::checked_mul`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_mul
165 [`Duration::checked_sub`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_sub
166 [`File::set_permissions`]: https://doc.rust-lang.org/std/fs/struct.File.html#method.set_permissions
167 [`IpAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv4
168 [`IpAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv6
169 [`Result::unwrap_or_default`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.unwrap_or_default
170 [`SocketAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv4
171 [`SocketAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv6
172 [`String::insert_str`]: https://doc.rust-lang.org/std/string/struct.String.html#method.insert_str
173 [`String::split_off`]: https://doc.rust-lang.org/std/string/struct.String.html#method.split_off
174 [`Vec::dedup_by_key`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by_key
175 [`Vec::dedup_by`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by
176 [`VecDeque::resize`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.resize
177 [`VecDeque::truncate`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.truncate
178 [`str::repeat`]: https://doc.rust-lang.org/std/primitive.str.html#method.repeat
179 [`str::replacen`]: https://doc.rust-lang.org/std/primitive.str.html#method.replacen
180 [cargo/3296]: https://github.com/rust-lang/cargo/pull/3296
181 [cargo/3301]: https://github.com/rust-lang/cargo/pull/3301
182 [cargo/3443]: https://github.com/rust-lang/cargo/pull/3443
183 [cargo/3511]: https://github.com/rust-lang/cargo/pull/3511
184 [cargo/3515]: https://github.com/rust-lang/cargo/pull/3515
185 [cargo/3534]: https://github.com/rust-lang/cargo/pull/3534
186 [cargo/3546]: https://github.com/rust-lang/cargo/pull/3546
187 [cargo/3557]: https://github.com/rust-lang/cargo/pull/3557
188 [cargo/3604]: https://github.com/rust-lang/cargo/pull/3604
189 [RFC 1623]: https://github.com/rust-lang/rfcs/blob/master/text/1623-static.md
192 Version 1.15.1 (2017-02-09)
193 ===========================
195 * [Fix IntoIter::as_mut_slice's signature][39466]
196 * [Compile compiler builtins with `-fPIC` on 32-bit platforms][39523]
198 [39466]: https://github.com/rust-lang/rust/pull/39466
199 [39523]: https://github.com/rust-lang/rust/pull/39523
202 Version 1.15.0 (2017-02-02)
203 ===========================
208 * Basic procedural macros allowing custom `#[derive]`, aka "macros 1.1", are
209 stable. This allows popular code-generating crates like Serde and Diesel to
210 work ergonomically. [RFC 1681].
211 * [Tuple structs may be empty. Unary and empty tuple structs may be instantiated
212 with curly braces][36868]. Part of [RFC 1506].
213 * [A number of minor changes to name resolution have been activated][37127].
214 They add up to more consistent semantics, allowing for future evolution of
215 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
216 details of what is different. The breaking changes here have been transitioned
217 through the [`legacy_imports`] lint since 1.14, with no known regressions.
218 * [In `macro_rules`, `path` fragments can now be parsed as type parameter
220 * [`?Sized` can be used in `where` clauses][37791]
221 * [There is now a limit on the size of monomorphized types and it can be
222 modified with the `#![type_size_limit]` crate attribute, similarly to
223 the `#![recursion_limit]` attribute][37789]
228 * [On Windows, the compiler will apply dllimport attributes when linking to
229 extern functions][37973]. Additional attributes and flags can control which
230 library kind is linked and its name. [RFC 1717].
231 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
232 * [The `--test` flag works with procedural macro crates][38107]
233 * [Fix `extern "aapcs" fn` ABI][37814]
234 * [The `-C no-stack-check` flag is deprecated][37636]. It does nothing.
235 * [The `format!` expander recognizes incorrect `printf` and shell-style
236 formatting directives and suggests the correct format][37613].
237 * [Only report one error for all unused imports in an import list][37456]
242 * [Avoid unnecessary `mk_ty` calls in `Ty::super_fold_with`][37705]
243 * [Avoid more unnecessary `mk_ty` calls in `Ty::super_fold_with`][37979]
244 * [Don't clone in `UnificationTable::probe`][37848]
245 * [Remove `scope_auxiliary` to cut RSS by 10%][37764]
246 * [Use small vectors in type walker][37760]
247 * [Macro expansion performance was improved][37701]
248 * [Change `HirVec<P<T>>` to `HirVec<T>` in `hir::Expr`][37642]
249 * [Replace FNV with a faster hash function][37229]
254 * [`std::iter::Iterator::min_by`]
255 * [`std::iter::Iterator::max_by`]
256 * [`std::os::*::fs::FileExt`]
257 * [`std::sync::atomic::Atomic*::get_mut`]
258 * [`std::sync::atomic::Atomic*::into_inner`]
259 * [`std::vec::IntoIter::as_slice`]
260 * [`std::vec::IntoIter::as_mut_slice`]
261 * [`std::sync::mpsc::Receiver::try_iter`]
262 * [`std::os::unix::process::CommandExt::before_exec`]
263 * [`std::rc::Rc::strong_count`]
264 * [`std::rc::Rc::weak_count`]
265 * [`std::sync::Arc::strong_count`]
266 * [`std::sync::Arc::weak_count`]
267 * [`std::char::encode_utf8`]
268 * [`std::char::encode_utf16`]
269 * [`std::cell::Ref::clone`]
270 * [`std::io::Take::into_inner`]
275 * [The standard sorting algorithm has been rewritten for dramatic performance
276 improvements][38192]. It is a hybrid merge sort, drawing influences from
277 Timsort. Previously it was a naive merge sort.
278 * [`Iterator::nth` no longer has a `Sized` bound][38134]
279 * [`Extend<&T>` is specialized for `Vec` where `T: Copy`][38182] to improve
281 * [`chars().count()` is much faster][37888] and so are [`chars().last()`
282 and `char_indices().last()`][37882]
283 * [Fix ARM Objective-C ABI in `std::env::args`][38146]
284 * [Chinese characters display correctly in `fmt::Debug`][37855]
285 * [Derive `Default` for `Duration`][37699]
286 * [Support creation of anonymous pipes on WinXP/2k][37677]
287 * [`mpsc::RecvTimeoutError` implements `Error`][37527]
288 * [Don't pass overlapped handles to processes][38835]
293 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
294 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
295 should instead check the variable at runtime with `std::env`. That the value
296 was set at build time was a bug, and incorrect when cross-compiling. This
297 change is known to cause breakage.
298 * [Add `--all` flag to `cargo test`][cargo/3221]
299 * [Compile statically against the MSVC CRT][cargo/3363]
300 * [Mix feature flags into fingerprint/metadata shorthash][cargo/3102]
301 * [Link OpenSSL statically on OSX][cargo/3311]
302 * [Apply new fingerprinting to build dir outputs][cargo/3310]
303 * [Test for bad path overrides with summaries][cargo/3336]
304 * [Require `cargo install --vers` to take a semver version][cargo/3338]
305 * [Fix retrying crate downloads for network errors][cargo/3348]
306 * [Implement string lookup for `build.rustflags` config key][cargo/3356]
307 * [Emit more info on --message-format=json][cargo/3319]
308 * [Assume `build.rs` in the same directory as `Cargo.toml` is a build script][cargo/3361]
309 * [Don't ignore errors in workspace manifest][cargo/3409]
310 * [Fix `--message-format JSON` when rustc emits non-JSON warnings][cargo/3410]
315 * [Test runners (binaries built with `--test`) now support a `--list` argument
316 that lists the tests it contains][38185]
317 * [Test runners now support a `--exact` argument that makes the test filter
318 match exactly, instead of matching only a substring of the test name][38181]
319 * [rustdoc supports a `--playground-url` flag][37763]
320 * [rustdoc provides more details about `#[should_panic]` errors][37749]
325 * [The Rust build system is now written in Rust][37817]. The Makefiles may
326 continue to be used in this release by passing `--disable-rustbuild` to the
327 configure script, but they will be deleted soon. Note that the new build
328 system uses a different on-disk layout that will likely affect any scripts
330 * [Rust supports i686-unknown-openbsd][38086]. Tier 3 support. No testing or
332 * [Rust supports the MSP430][37627]. Tier 3 support. No testing or releases.
333 * [Rust supports the ARMv5TE architecture][37615]. Tier 3 support. No testing or
339 * [A number of minor changes to name resolution have been activated][37127].
340 They add up to more consistent semantics, allowing for future evolution of
341 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
342 details of what is different. The breaking changes here have been transitioned
343 through the [`legacy_imports`] lint since 1.14, with no known regressions.
344 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
345 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
346 should instead check the variable at runtime with `std::env`. That the value
347 was set at build time was a bug, and incorrect when cross-compiling. This
348 change is known to cause breakage.
349 * [Higher-ranked lifetimes are no longer allowed to appear _only_ in associated
350 types][33685]. The [`hr_lifetime_in_assoc_type` lint] has been a warning since
351 1.10 and is now an error by default. It will become a hard error in the near
353 * [The semantics relating modules to file system directories are changing in
354 minor ways][37602]. This is captured in the new `legacy_directory_ownership`
355 lint, which is a warning in this release, and will become a hard error in the
357 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
358 * [Once `Peekable` peeks a `None` it will return that `None` without re-querying
359 the underlying iterator][37834]
361 ["changes"]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md#changes-to-name-resolution-rules
362 [33685]: https://github.com/rust-lang/rust/issues/33685
363 [36868]: https://github.com/rust-lang/rust/pull/36868
364 [37127]: https://github.com/rust-lang/rust/pull/37127
365 [37229]: https://github.com/rust-lang/rust/pull/37229
366 [37456]: https://github.com/rust-lang/rust/pull/37456
367 [37527]: https://github.com/rust-lang/rust/pull/37527
368 [37602]: https://github.com/rust-lang/rust/pull/37602
369 [37613]: https://github.com/rust-lang/rust/pull/37613
370 [37615]: https://github.com/rust-lang/rust/pull/37615
371 [37636]: https://github.com/rust-lang/rust/pull/37636
372 [37627]: https://github.com/rust-lang/rust/pull/37627
373 [37642]: https://github.com/rust-lang/rust/pull/37642
374 [37677]: https://github.com/rust-lang/rust/pull/37677
375 [37699]: https://github.com/rust-lang/rust/pull/37699
376 [37701]: https://github.com/rust-lang/rust/pull/37701
377 [37705]: https://github.com/rust-lang/rust/pull/37705
378 [37749]: https://github.com/rust-lang/rust/pull/37749
379 [37760]: https://github.com/rust-lang/rust/pull/37760
380 [37763]: https://github.com/rust-lang/rust/pull/37763
381 [37764]: https://github.com/rust-lang/rust/pull/37764
382 [37789]: https://github.com/rust-lang/rust/pull/37789
383 [37791]: https://github.com/rust-lang/rust/pull/37791
384 [37814]: https://github.com/rust-lang/rust/pull/37814
385 [37817]: https://github.com/rust-lang/rust/pull/37817
386 [37834]: https://github.com/rust-lang/rust/pull/37834
387 [37848]: https://github.com/rust-lang/rust/pull/37848
388 [37855]: https://github.com/rust-lang/rust/pull/37855
389 [37882]: https://github.com/rust-lang/rust/pull/37882
390 [37888]: https://github.com/rust-lang/rust/pull/37888
391 [37973]: https://github.com/rust-lang/rust/pull/37973
392 [37979]: https://github.com/rust-lang/rust/pull/37979
393 [38086]: https://github.com/rust-lang/rust/pull/38086
394 [38107]: https://github.com/rust-lang/rust/pull/38107
395 [38117]: https://github.com/rust-lang/rust/pull/38117
396 [38134]: https://github.com/rust-lang/rust/pull/38134
397 [38146]: https://github.com/rust-lang/rust/pull/38146
398 [38181]: https://github.com/rust-lang/rust/pull/38181
399 [38182]: https://github.com/rust-lang/rust/pull/38182
400 [38185]: https://github.com/rust-lang/rust/pull/38185
401 [38192]: https://github.com/rust-lang/rust/pull/38192
402 [38279]: https://github.com/rust-lang/rust/pull/38279
403 [38835]: https://github.com/rust-lang/rust/pull/38835
404 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
405 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
406 [RFC 1560]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md
407 [RFC 1681]: https://github.com/rust-lang/rfcs/blob/master/text/1681-macros-1.1.md
408 [RFC 1717]: https://github.com/rust-lang/rfcs/blob/master/text/1717-dllimport.md
409 [`hr_lifetime_in_assoc_type` lint]: https://github.com/rust-lang/rust/issues/33685
410 [`legacy_imports`]: https://github.com/rust-lang/rust/pull/38271
411 [cargo/3102]: https://github.com/rust-lang/cargo/pull/3102
412 [cargo/3221]: https://github.com/rust-lang/cargo/pull/3221
413 [cargo/3310]: https://github.com/rust-lang/cargo/pull/3310
414 [cargo/3311]: https://github.com/rust-lang/cargo/pull/3311
415 [cargo/3319]: https://github.com/rust-lang/cargo/pull/3319
416 [cargo/3336]: https://github.com/rust-lang/cargo/pull/3336
417 [cargo/3338]: https://github.com/rust-lang/cargo/pull/3338
418 [cargo/3348]: https://github.com/rust-lang/cargo/pull/3348
419 [cargo/3356]: https://github.com/rust-lang/cargo/pull/3356
420 [cargo/3361]: https://github.com/rust-lang/cargo/pull/3361
421 [cargo/3363]: https://github.com/rust-lang/cargo/pull/3363
422 [cargo/3368]: https://github.com/rust-lang/cargo/issues/3368
423 [cargo/3409]: https://github.com/rust-lang/cargo/pull/3409
424 [cargo/3410]: https://github.com/rust-lang/cargo/pull/3410
425 [`std::iter::Iterator::min_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.min_by
426 [`std::iter::Iterator::max_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.max_by
427 [`std::os::*::fs::FileExt`]: https://doc.rust-lang.org/std/os/unix/fs/trait.FileExt.html
428 [`std::sync::atomic::Atomic*::get_mut`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.get_mut
429 [`std::sync::atomic::Atomic*::into_inner`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.into_inner
430 [`std::vec::IntoIter::as_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_slice
431 [`std::vec::IntoIter::as_mut_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_mut_slice
432 [`std::sync::mpsc::Receiver::try_iter`]: https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.try_iter
433 [`std::os::unix::process::CommandExt::before_exec`]: https://doc.rust-lang.org/std/os/unix/process/trait.CommandExt.html#tymethod.before_exec
434 [`std::rc::Rc::strong_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.strong_count
435 [`std::rc::Rc::weak_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.weak_count
436 [`std::sync::Arc::strong_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.strong_count
437 [`std::sync::Arc::weak_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.weak_count
438 [`std::char::encode_utf8`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf8
439 [`std::char::encode_utf16`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf16
440 [`std::cell::Ref::clone`]: https://doc.rust-lang.org/std/cell/struct.Ref.html#method.clone
441 [`std::io::Take::into_inner`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.into_inner
444 Version 1.14.0 (2016-12-22)
445 ===========================
450 * [`..` matches multiple tuple fields in enum variants, structs
451 and tuples][36843]. [RFC 1492].
452 * [Safe `fn` items can be coerced to `unsafe fn` pointers][37389]
453 * [`use *` and `use ::*` both glob-import from the crate root][37367]
454 * [It's now possible to call a `Vec<Box<Fn()>>` without explicit
455 dereferencing][36822]
460 * [Mark enums with non-zero discriminant as non-zero][37224]
461 * [Lower-case `static mut` names are linted like other
462 statics and consts][37162]
463 * [Fix ICE on some macros in const integer positions
464 (e.g. `[u8; m!()]`)][36819]
465 * [Improve error message and snippet for "did you mean `x`"][36798]
466 * [Add a panic-strategy field to the target specification][36794]
467 * [Include LLVM version in `--version --verbose`][37200]
469 Compile-time Optimizations
470 --------------------------
472 * [Improve macro expansion performance][37569]
473 * [Shrink `Expr_::ExprInlineAsm`][37445]
474 * [Replace all uses of SHA-256 with BLAKE2b][37439]
475 * [Reduce the number of bytes hashed by `IchHasher`][37427]
476 * [Avoid more allocations when compiling html5ever][37373]
477 * [Use `SmallVector` in `CombineFields::instantiate`][37322]
478 * [Avoid some allocations in the macro parser][37318]
479 * [Use a faster deflate setting][37298]
480 * [Add `ArrayVec` and `AccumulateVec` to reduce heap allocations
481 during interning of slices][37270]
482 * [Optimize `write_metadata`][37267]
483 * [Don't process obligation forest cycles when stalled][37231]
484 * [Avoid many `CrateConfig` clones][37161]
485 * [Optimize `Substs::super_fold_with`][37108]
486 * [Optimize `ObligationForest`'s `NodeState` handling][36993]
487 * [Speed up `plug_leaks`][36917]
492 * [`println!()`, with no arguments, prints newline][36825].
493 Previously, an empty string was required to achieve the same.
494 * [`Wrapping` impls standard binary and unary operators, as well as
495 the `Sum` and `Product` iterators][37356]
496 * [Implement `From<Cow<str>> for String` and `From<Cow<[T]>> for
498 * [Improve `fold` performance for `chain`, `cloned`, `map`, and
499 `VecDeque` iterators][37315]
500 * [Improve `SipHasher` performance on small values][37312]
501 * [Add Iterator trait TrustedLen to enable better FromIterator /
503 * [Expand `.zip()` specialization to `.map()` and `.cloned()`][37230]
504 * [`ReadDir` implements `Debug`][37221]
505 * [Implement `RefUnwindSafe` for atomic types][37178]
506 * [Specialize `Vec::extend` to `Vec::extend_from_slice`][37094]
507 * [Avoid allocations in `Decoder::read_str`][37064]
508 * [`io::Error` implements `From<io::ErrorKind>`][37037]
509 * [Impl `Debug` for raw pointers to unsized data][36880]
510 * [Don't reuse `HashMap` random seeds][37470]
511 * [The internal memory layout of `HashMap` is more cache-friendly, for
512 significant improvements in some operations][36692]
513 * [`HashMap` uses less memory on 32-bit architectures][36595]
514 * [Impl `Add<{str, Cow<str>}>` for `Cow<str>`][36430]
519 * [Expose rustc cfg values to build scripts][cargo/3243]
520 * [Allow cargo to work with read-only `CARGO_HOME`][cargo/3259]
521 * [Fix passing --features when testing multiple packages][cargo/3280]
522 * [Use a single profile set per workspace][cargo/3249]
523 * [Load `replace` sections from lock files][cargo/3220]
524 * [Ignore `panic` configuration for test/bench profiles][cargo/3175]
529 * [rustup is the recommended Rust installation method][1.14rustup]
530 * This release includes host (rustc) builds for Linux on MIPS, PowerPC, and
531 S390x. These are [tier 2] platforms and may have major defects. Follow the
532 instructions on the website to install, or add the targets to an existing
533 installation with `rustup target add`. The new target triples are:
534 - `mips-unknown-linux-gnu`
535 - `mipsel-unknown-linux-gnu`
536 - `mips64-unknown-linux-gnuabi64`
537 - `mips64el-unknown-linux-gnuabi64 `
538 - `powerpc-unknown-linux-gnu`
539 - `powerpc64-unknown-linux-gnu`
540 - `powerpc64le-unknown-linux-gnu`
541 - `s390x-unknown-linux-gnu `
542 * This release includes target (std) builds for ARM Linux running MUSL
543 libc. These are [tier 2] platforms and may have major defects. Add the
544 following triples to an existing rustup installation with `rustup target add`:
545 - `arm-unknown-linux-musleabi`
546 - `arm-unknown-linux-musleabihf`
547 - `armv7-unknown-linux-musleabihf`
548 * This release includes [experimental support for WebAssembly][1.14wasm], via
549 the `wasm32-unknown-emscripten` target. This target is known to have major
550 defects. Please test, report, and fix.
551 * rustup no longer installs documentation by default. Run `rustup
552 component add rust-docs` to install.
553 * [Fix line stepping in debugger][37310]
554 * [Enable line number debuginfo in releases][37280]
559 * [Disable jemalloc on aarch64/powerpc/mips][37392]
560 * [Add support for Fuchsia OS][37313]
561 * [Detect local-rebuild by only MAJOR.MINOR version][37273]
566 * [A number of forward-compatibility lints used by the compiler
567 to gradually introduce language changes have been converted
568 to deny by default][36894]:
569 - ["use of inaccessible extern crate erroneously allowed"][36886]
570 - ["type parameter default erroneously allowed in invalid location"][36887]
571 - ["detects super or self keywords at the beginning of global path"][36888]
572 - ["two overlapping inherent impls define an item with the same name
573 were erroneously allowed"][36889]
574 - ["floating-point constants cannot be used in patterns"][36890]
575 - ["constants of struct or enum type can only be used in a pattern if
576 the struct or enum has `#[derive(PartialEq, Eq)]`"][36891]
577 - ["lifetimes or labels named `'_` were erroneously allowed"][36892]
578 * [Prohibit patterns in trait methods without bodies][37378]
579 * [The atomic `Ordering` enum may not be matched exhaustively][37351]
580 * [Future-proofing `#[no_link]` breaks some obscure cases][37247]
581 * [The `$crate` macro variable is accepted in fewer locations][37213]
582 * [Impls specifying extra region requirements beyond the trait
583 they implement are rejected][37167]
584 * [Enums may not be unsized][37111]. Unsized enums are intended to
585 work but never have. For now they are forbidden.
586 * [Enforce the shadowing restrictions from RFC 1560 for today's macros][36767]
588 [tier 2]: https://forge.rust-lang.org/platform-support.html
589 [1.14rustup]: https://internals.rust-lang.org/t/beta-testing-rustup-rs/3316/204
590 [1.14wasm]: https://users.rust-lang.org/t/compiling-to-the-web-with-rust-and-emscripten/7627
591 [36430]: https://github.com/rust-lang/rust/pull/36430
592 [36595]: https://github.com/rust-lang/rust/pull/36595
593 [36595]: https://github.com/rust-lang/rust/pull/36595
594 [36692]: https://github.com/rust-lang/rust/pull/36692
595 [36767]: https://github.com/rust-lang/rust/pull/36767
596 [36794]: https://github.com/rust-lang/rust/pull/36794
597 [36798]: https://github.com/rust-lang/rust/pull/36798
598 [36819]: https://github.com/rust-lang/rust/pull/36819
599 [36822]: https://github.com/rust-lang/rust/pull/36822
600 [36825]: https://github.com/rust-lang/rust/pull/36825
601 [36843]: https://github.com/rust-lang/rust/pull/36843
602 [36880]: https://github.com/rust-lang/rust/pull/36880
603 [36886]: https://github.com/rust-lang/rust/issues/36886
604 [36887]: https://github.com/rust-lang/rust/issues/36887
605 [36888]: https://github.com/rust-lang/rust/issues/36888
606 [36889]: https://github.com/rust-lang/rust/issues/36889
607 [36890]: https://github.com/rust-lang/rust/issues/36890
608 [36891]: https://github.com/rust-lang/rust/issues/36891
609 [36892]: https://github.com/rust-lang/rust/issues/36892
610 [36894]: https://github.com/rust-lang/rust/pull/36894
611 [36917]: https://github.com/rust-lang/rust/pull/36917
612 [36993]: https://github.com/rust-lang/rust/pull/36993
613 [37037]: https://github.com/rust-lang/rust/pull/37037
614 [37064]: https://github.com/rust-lang/rust/pull/37064
615 [37094]: https://github.com/rust-lang/rust/pull/37094
616 [37108]: https://github.com/rust-lang/rust/pull/37108
617 [37111]: https://github.com/rust-lang/rust/pull/37111
618 [37161]: https://github.com/rust-lang/rust/pull/37161
619 [37162]: https://github.com/rust-lang/rust/pull/37162
620 [37167]: https://github.com/rust-lang/rust/pull/37167
621 [37178]: https://github.com/rust-lang/rust/pull/37178
622 [37200]: https://github.com/rust-lang/rust/pull/37200
623 [37213]: https://github.com/rust-lang/rust/pull/37213
624 [37221]: https://github.com/rust-lang/rust/pull/37221
625 [37224]: https://github.com/rust-lang/rust/pull/37224
626 [37230]: https://github.com/rust-lang/rust/pull/37230
627 [37231]: https://github.com/rust-lang/rust/pull/37231
628 [37247]: https://github.com/rust-lang/rust/pull/37247
629 [37267]: https://github.com/rust-lang/rust/pull/37267
630 [37270]: https://github.com/rust-lang/rust/pull/37270
631 [37273]: https://github.com/rust-lang/rust/pull/37273
632 [37280]: https://github.com/rust-lang/rust/pull/37280
633 [37298]: https://github.com/rust-lang/rust/pull/37298
634 [37306]: https://github.com/rust-lang/rust/pull/37306
635 [37310]: https://github.com/rust-lang/rust/pull/37310
636 [37312]: https://github.com/rust-lang/rust/pull/37312
637 [37313]: https://github.com/rust-lang/rust/pull/37313
638 [37315]: https://github.com/rust-lang/rust/pull/37315
639 [37318]: https://github.com/rust-lang/rust/pull/37318
640 [37322]: https://github.com/rust-lang/rust/pull/37322
641 [37326]: https://github.com/rust-lang/rust/pull/37326
642 [37351]: https://github.com/rust-lang/rust/pull/37351
643 [37356]: https://github.com/rust-lang/rust/pull/37356
644 [37367]: https://github.com/rust-lang/rust/pull/37367
645 [37373]: https://github.com/rust-lang/rust/pull/37373
646 [37378]: https://github.com/rust-lang/rust/pull/37378
647 [37389]: https://github.com/rust-lang/rust/pull/37389
648 [37392]: https://github.com/rust-lang/rust/pull/37392
649 [37427]: https://github.com/rust-lang/rust/pull/37427
650 [37439]: https://github.com/rust-lang/rust/pull/37439
651 [37445]: https://github.com/rust-lang/rust/pull/37445
652 [37470]: https://github.com/rust-lang/rust/pull/37470
653 [37569]: https://github.com/rust-lang/rust/pull/37569
654 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
655 [cargo/3175]: https://github.com/rust-lang/cargo/pull/3175
656 [cargo/3220]: https://github.com/rust-lang/cargo/pull/3220
657 [cargo/3243]: https://github.com/rust-lang/cargo/pull/3243
658 [cargo/3249]: https://github.com/rust-lang/cargo/pull/3249
659 [cargo/3259]: https://github.com/rust-lang/cargo/pull/3259
660 [cargo/3280]: https://github.com/rust-lang/cargo/pull/3280
663 Version 1.13.0 (2016-11-10)
664 ===========================
669 * [Stabilize the `?` operator][36995]. `?` is a simple way to propagate
670 errors, like the `try!` macro, described in [RFC 0243].
671 * [Stabilize macros in type position][36014]. Described in [RFC 873].
672 * [Stabilize attributes on statements][36995]. Described in [RFC 0016].
673 * [Fix `#[derive]` for empty tuple structs/variants][35728]
674 * [Fix lifetime rules for 'if' conditions][36029]
675 * [Avoid loading and parsing unconfigured non-inline modules][36482]
680 * [Add the `-C link-arg` argument][36574]
681 * [Remove the old AST-based backend from rustc_trans][35764]
682 * [Don't enable NEON by default on armv7 Linux][35814]
683 * [Fix debug line number info for macro expansions][35238]
684 * [Do not emit "class method" debuginfo for types that are not
685 DICompositeType][36008]
686 * [Warn about multiple conflicting #[repr] hints][34623]
687 * [When sizing DST, don't double-count nested struct prefixes][36351]
688 * [Default RUST_MIN_STACK to 16MiB for now][36505]
689 * [Improve rlib metadata format][36551]. Reduces rlib size significantly.
690 * [Reject macros with empty repetitions to avoid infinite loop][36721]
691 * [Expand macros without recursing to avoid stack overflows][36214]
696 * [Replace macro backtraces with labeled local uses][35702]
697 * [Improve error message for missplaced doc comments][33922]
698 * [Buffer unix and lock windows to prevent message interleaving][35975]
699 * [Update lifetime errors to specifically note temporaries][36171]
700 * [Special case a few colors for Windows][36178]
701 * [Suggest `use self` when such an import resolves][36289]
702 * [Be more specific when type parameter shadows primitive type][36338]
703 * Many minor improvements
705 Compile-time Optimizations
706 --------------------------
708 * [Compute and cache HIR hashes at beginning][35854]
709 * [Don't hash types in loan paths][36004]
710 * [Cache projections in trans][35761]
711 * [Optimize the parser's last token handling][36527]
712 * [Only instantiate #[inline] functions in codegen units referencing
713 them][36524]. This leads to big improvements in cases where crates export
714 define many inline functions without using them directly.
715 * [Lazily allocate TypedArena's first chunk][36592]
716 * [Don't allocate during default HashSet creation][36734]
723 * [`overflowing_abs`]
724 * [`RefCell::try_borrow`]
725 * [`RefCell::try_borrow_mut`]
730 * [Add `assert_ne!` and `debug_assert_ne!`][35074]
731 * [Make `vec_deque::Drain`, `hash_map::Drain`, and `hash_set::Drain`
733 * [Implement `AsRef<[T]>` for `std::slice::Iter`][35559]
734 * [Implement `Debug` for `std::vec::IntoIter`][35707]
735 * [`CString`: avoid excessive growth just to 0-terminate][35871]
736 * [Implement `CoerceUnsized` for `{Cell, RefCell, UnsafeCell}`][35627]
737 * [Use arc4rand on FreeBSD][35884]
738 * [memrchr: Correct aligned offset computation][35969]
739 * [Improve Demangling of Rust Symbols][36059]
740 * [Use monotonic time in condition variables][35048]
741 * [Implement `Debug` for `std::path::{Components,Iter}`][36101]
742 * [Implement conversion traits for `char`][35755]
743 * [Fix illegal instruction caused by overflow in channel cloning][36104]
744 * [Zero first byte of CString on drop][36264]
745 * [Inherit overflow checks for sum and product][36372]
746 * [Add missing Eq implementations][36423]
747 * [Implement `Debug` for `DirEntry`][36631]
748 * [When `getaddrinfo` returns `EAI_SYSTEM` retrieve actual error from
750 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
751 * [Implement more traits for `std::io::ErrorKind`][35911]
752 * [Optimize BinaryHeap bounds checking][36072]
753 * [Work around pointer aliasing issue in `Vec::extend_from_slice`,
754 `extend_with_element`][36355]
755 * [Fix overflow checking in unsigned pow()][34942]
760 * This release includes security fixes to both curl and OpenSSL.
761 * [Fix transitive doctests when panic=abort][cargo/3021]
762 * [Add --all-features flag to cargo][cargo/3038]
763 * [Reject path-based dependencies in `cargo package`][cargo/3060]
764 * [Don't parse the home directory more than once][cargo/3078]
765 * [Don't try to generate Cargo.lock on empty workspaces][cargo/3092]
766 * [Update OpenSSL to 1.0.2j][cargo/3121]
767 * [Add license and license_file to cargo metadata output][cargo/3110]
768 * [Make crates-io registry URL optional in config; ignore all changes to
769 source.crates-io][cargo/3089]
770 * [Don't download dependencies from other platforms][cargo/3123]
771 * [Build transitive dev-dependencies when needed][cargo/3125]
772 * [Add support for per-target rustflags in .cargo/config][cargo/3157]
773 * [Avoid updating registry when adding existing deps][cargo/3144]
774 * [Warn about path overrides that won't work][cargo/3136]
775 * [Use workspaces during `cargo install`][cargo/3146]
776 * [Leak mspdbsrv.exe processes on Windows][cargo/3162]
777 * [Add --message-format flag][cargo/3000]
778 * [Pass target environment for rustdoc][cargo/3205]
779 * [Use `CommandExt::exec` for `cargo run` on Unix][cargo/2818]
780 * [Update curl and curl-sys][cargo/3241]
781 * [Call rustdoc test with the correct cfg flags of a package][cargo/3242]
786 * [rustdoc: Add the `--sysroot` argument][36586]
787 * [rustdoc: Fix a couple of issues with the search results][35655]
788 * [rustdoc: remove the `!` from macro URLs and titles][35234]
789 * [gdb: Fix pretty-printing special-cased Rust types][35585]
790 * [rustdoc: Filter more incorrect methods inherited through Deref][36266]
795 * [Remove unmaintained style guide][35124]
796 * [Add s390x support][36369]
797 * [Initial work at Haiku OS support][36727]
798 * [Add mips-uclibc targets][35734]
799 * [Crate-ify compiler-rt into compiler-builtins][35021]
800 * [Add rustc version info (git hash + date) to dist tarball][36213]
801 * Many documentation improvements
806 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
807 * [Deny (by default) transmuting from fn item types to pointer-sized
808 types][34923]. Continuing the long transition to zero-sized fn items,
810 * [Fix `#[derive]` for empty tuple structs/variants][35728].
812 * [Issue deprecation warnings for safe accesses to extern statics][36173]
813 * [Fix lifetime rules for 'if' conditions][36029].
814 * [Inherit overflow checks for sum and product][36372].
815 * [Forbid user-defined macros named "macro_rules"][36730].
817 [33922]: https://github.com/rust-lang/rust/pull/33922
818 [34623]: https://github.com/rust-lang/rust/pull/34623
819 [34923]: https://github.com/rust-lang/rust/pull/34923
820 [34942]: https://github.com/rust-lang/rust/pull/34942
821 [34982]: https://github.com/rust-lang/rust/pull/34982
822 [35021]: https://github.com/rust-lang/rust/pull/35021
823 [35048]: https://github.com/rust-lang/rust/pull/35048
824 [35074]: https://github.com/rust-lang/rust/pull/35074
825 [35124]: https://github.com/rust-lang/rust/pull/35124
826 [35234]: https://github.com/rust-lang/rust/pull/35234
827 [35238]: https://github.com/rust-lang/rust/pull/35238
828 [35354]: https://github.com/rust-lang/rust/pull/35354
829 [35559]: https://github.com/rust-lang/rust/pull/35559
830 [35585]: https://github.com/rust-lang/rust/pull/35585
831 [35627]: https://github.com/rust-lang/rust/pull/35627
832 [35655]: https://github.com/rust-lang/rust/pull/35655
833 [35702]: https://github.com/rust-lang/rust/pull/35702
834 [35707]: https://github.com/rust-lang/rust/pull/35707
835 [35728]: https://github.com/rust-lang/rust/pull/35728
836 [35734]: https://github.com/rust-lang/rust/pull/35734
837 [35755]: https://github.com/rust-lang/rust/pull/35755
838 [35761]: https://github.com/rust-lang/rust/pull/35761
839 [35764]: https://github.com/rust-lang/rust/pull/35764
840 [35814]: https://github.com/rust-lang/rust/pull/35814
841 [35854]: https://github.com/rust-lang/rust/pull/35854
842 [35871]: https://github.com/rust-lang/rust/pull/35871
843 [35884]: https://github.com/rust-lang/rust/pull/35884
844 [35911]: https://github.com/rust-lang/rust/pull/35911
845 [35969]: https://github.com/rust-lang/rust/pull/35969
846 [35975]: https://github.com/rust-lang/rust/pull/35975
847 [36004]: https://github.com/rust-lang/rust/pull/36004
848 [36008]: https://github.com/rust-lang/rust/pull/36008
849 [36014]: https://github.com/rust-lang/rust/pull/36014
850 [36029]: https://github.com/rust-lang/rust/pull/36029
851 [36059]: https://github.com/rust-lang/rust/pull/36059
852 [36072]: https://github.com/rust-lang/rust/pull/36072
853 [36101]: https://github.com/rust-lang/rust/pull/36101
854 [36104]: https://github.com/rust-lang/rust/pull/36104
855 [36171]: https://github.com/rust-lang/rust/pull/36171
856 [36173]: https://github.com/rust-lang/rust/pull/36173
857 [36178]: https://github.com/rust-lang/rust/pull/36178
858 [36213]: https://github.com/rust-lang/rust/pull/36213
859 [36214]: https://github.com/rust-lang/rust/pull/36214
860 [36264]: https://github.com/rust-lang/rust/pull/36264
861 [36266]: https://github.com/rust-lang/rust/pull/36266
862 [36289]: https://github.com/rust-lang/rust/pull/36289
863 [36338]: https://github.com/rust-lang/rust/pull/36338
864 [36351]: https://github.com/rust-lang/rust/pull/36351
865 [36355]: https://github.com/rust-lang/rust/pull/36355
866 [36369]: https://github.com/rust-lang/rust/pull/36369
867 [36372]: https://github.com/rust-lang/rust/pull/36372
868 [36423]: https://github.com/rust-lang/rust/pull/36423
869 [36482]: https://github.com/rust-lang/rust/pull/36482
870 [36505]: https://github.com/rust-lang/rust/pull/36505
871 [36524]: https://github.com/rust-lang/rust/pull/36524
872 [36527]: https://github.com/rust-lang/rust/pull/36527
873 [36551]: https://github.com/rust-lang/rust/pull/36551
874 [36574]: https://github.com/rust-lang/rust/pull/36574
875 [36586]: https://github.com/rust-lang/rust/pull/36586
876 [36592]: https://github.com/rust-lang/rust/pull/36592
877 [36631]: https://github.com/rust-lang/rust/pull/36631
878 [36639]: https://github.com/rust-lang/rust/pull/36639
879 [36721]: https://github.com/rust-lang/rust/pull/36721
880 [36727]: https://github.com/rust-lang/rust/pull/36727
881 [36730]: https://github.com/rust-lang/rust/pull/36730
882 [36734]: https://github.com/rust-lang/rust/pull/36734
883 [36754]: https://github.com/rust-lang/rust/pull/36754
884 [36995]: https://github.com/rust-lang/rust/pull/36995
885 [RFC 0016]: https://github.com/rust-lang/rfcs/blob/master/text/0016-more-attributes.md
886 [RFC 0243]: https://github.com/rust-lang/rfcs/blob/master/text/0243-trait-based-exception-handling.md
887 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
888 [RFC 401]: https://github.com/rust-lang/rfcs/blob/master/text/0401-coercions.md
889 [RFC 873]: https://github.com/rust-lang/rfcs/blob/master/text/0873-type-macros.md
890 [cargo/2818]: https://github.com/rust-lang/cargo/pull/2818
891 [cargo/3000]: https://github.com/rust-lang/cargo/pull/3000
892 [cargo/3021]: https://github.com/rust-lang/cargo/pull/3021
893 [cargo/3038]: https://github.com/rust-lang/cargo/pull/3038
894 [cargo/3060]: https://github.com/rust-lang/cargo/pull/3060
895 [cargo/3078]: https://github.com/rust-lang/cargo/pull/3078
896 [cargo/3089]: https://github.com/rust-lang/cargo/pull/3089
897 [cargo/3092]: https://github.com/rust-lang/cargo/pull/3092
898 [cargo/3110]: https://github.com/rust-lang/cargo/pull/3110
899 [cargo/3121]: https://github.com/rust-lang/cargo/pull/3121
900 [cargo/3123]: https://github.com/rust-lang/cargo/pull/3123
901 [cargo/3125]: https://github.com/rust-lang/cargo/pull/3125
902 [cargo/3136]: https://github.com/rust-lang/cargo/pull/3136
903 [cargo/3144]: https://github.com/rust-lang/cargo/pull/3144
904 [cargo/3146]: https://github.com/rust-lang/cargo/pull/3146
905 [cargo/3157]: https://github.com/rust-lang/cargo/pull/3157
906 [cargo/3162]: https://github.com/rust-lang/cargo/pull/3162
907 [cargo/3205]: https://github.com/rust-lang/cargo/pull/3205
908 [cargo/3241]: https://github.com/rust-lang/cargo/pull/3241
909 [cargo/3242]: https://github.com/rust-lang/cargo/pull/3242
910 [rustup]: https://www.rustup.rs
911 [`checked_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.checked_abs
912 [`wrapping_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.wrapping_abs
913 [`overflowing_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.overflowing_abs
914 [`RefCell::try_borrow`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow
915 [`RefCell::try_borrow_mut`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow_mut
916 [`SipHasher`]: https://doc.rust-lang.org/std/hash/struct.SipHasher.html
917 [`DefaultHasher`]: https://doc.rust-lang.org/std/collections/hash_map/struct.DefaultHasher.html
920 Version 1.12.1 (2016-10-20)
921 ===========================
926 * [ICE: 'rustc' panicked at 'assertion failed: concrete_substs.is_normalized_for_trans()' #36381][36381]
927 * [Confusion with double negation and booleans][36856]
928 * [rustc 1.12.0 fails with SIGSEGV in release mode (syn crate 0.8.0)][36875]
929 * [Rustc 1.12.0 Windows build of `ethcore` crate fails with LLVM error][36924]
930 * [1.12.0: High memory usage when linking in release mode with debug info][36926]
931 * [Corrupted memory after updated to 1.12][36936]
932 * ["Let NullaryConstructor = something;" causes internal compiler error: "tried to overwrite interned AdtDef"][37026]
933 * [Fix ICE: inject bitcast if types mismatch for invokes/calls/stores][37112]
934 * [debuginfo: Handle spread_arg case in MIR-trans in a more stable way.][37153]
936 [36381]: https://github.com/rust-lang/rust/issues/36381
937 [36856]: https://github.com/rust-lang/rust/issues/36856
938 [36875]: https://github.com/rust-lang/rust/issues/36875
939 [36924]: https://github.com/rust-lang/rust/issues/36924
940 [36926]: https://github.com/rust-lang/rust/issues/36926
941 [36936]: https://github.com/rust-lang/rust/issues/36936
942 [37026]: https://github.com/rust-lang/rust/issues/37026
943 [37112]: https://github.com/rust-lang/rust/issues/37112
944 [37153]: https://github.com/rust-lang/rust/issues/37153
947 Version 1.12.0 (2016-09-29)
948 ===========================
953 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)]
954 (https://github.com/rust-lang/rust/pull/34096).
955 This translation pass is far simpler than the previous AST->LLVM pass, and
956 creates opportunities to perform new optimizations directly on the MIR. It
957 was previously described [on the Rust blog]
958 (https://blog.rust-lang.org/2016/04/19/MIR.html).
959 * [`rustc` presents a new, more readable error format, along with
960 machine-readable JSON error output for use by IDEs]
961 (https://github.com/rust-lang/rust/pull/35401).
962 Most common editors supporting Rust have been updated to work with it. It was
963 previously described [on the Rust blog]
964 (https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
969 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)]
970 (https://github.com/rust-lang/rust/pull/34096).
971 This translation pass is far simpler than the previous AST->LLVM pass, and
972 creates opportunities to perform new optimizations directly on the MIR. It
973 was previously described [on the Rust blog]
974 (https://blog.rust-lang.org/2016/04/19/MIR.html).
975 * [Print the Rust target name, not the LLVM target name, with
976 `--print target-list`]
977 (https://github.com/rust-lang/rust/pull/35489)
978 * [The computation of `TypeId` is correct in some cases where it was previously
979 producing inconsistent results]
980 (https://github.com/rust-lang/rust/pull/35267)
981 * [The `mips-unknown-linux-gnu` target uses hardware floating point by default]
982 (https://github.com/rust-lang/rust/pull/34910)
983 * [The `rustc` arguments, `--print target-cpus`, `--print target-features`,
984 `--print relocation-models`, and `--print code-models` print the available
985 options to the `-C target-cpu`, `-C target-feature`, `-C relocation-model` and
986 `-C code-model` code generation arguments]
987 (https://github.com/rust-lang/rust/pull/34845)
988 * [`rustc` supports three new MUSL targets on ARM: `arm-unknown-linux-musleabi`,
989 `arm-unknown-linux-musleabihf`, and `armv7-unknown-linux-musleabihf`]
990 (https://github.com/rust-lang/rust/pull/35060).
991 These targets produce statically-linked binaries. There are no binary release
997 * [`rustc` presents a new, more readable error format, along with
998 machine-readable JSON error output for use by IDEs]
999 (https://github.com/rust-lang/rust/pull/35401).
1000 Most common editors supporting Rust have been updated to work with it. It was
1001 previously described [on the Rust blog]
1002 (https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
1003 * [In error descriptions, references are now described in plain English,
1004 instead of as "&-ptr"]
1005 (https://github.com/rust-lang/rust/pull/35611)
1006 * [In error type descriptions, unknown numeric types are named `{integer}` or
1007 `{float}` instead of `_`]
1008 (https://github.com/rust-lang/rust/pull/35080)
1009 * [`rustc` emits a clearer error when inner attributes follow a doc comment]
1010 (https://github.com/rust-lang/rust/pull/34676)
1015 * [`macro_rules!` invocations can be made within `macro_rules!` invocations]
1016 (https://github.com/rust-lang/rust/pull/34925)
1017 * [`macro_rules!` meta-variables are hygienic]
1018 (https://github.com/rust-lang/rust/pull/35453)
1019 * [`macro_rules!` `tt` matchers can be reparsed correctly, making them much more
1021 (https://github.com/rust-lang/rust/pull/34908)
1022 * [`macro_rules!` `stmt` matchers correctly consume the entire contents when
1023 inside non-braces invocations]
1024 (https://github.com/rust-lang/rust/pull/34886)
1025 * [Semicolons are properly required as statement delimeters inside
1026 `macro_rules!` invocations]
1027 (https://github.com/rust-lang/rust/pull/34660)
1028 * [`cfg_attr` works on `path` attributes]
1029 (https://github.com/rust-lang/rust/pull/34546)
1035 (https://doc.rust-lang.org/std/cell/struct.Cell.html#method.as_ptr)
1036 * [`RefCell::as_ptr`]
1037 (https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.as_ptr)
1038 * [`IpAddr::is_unspecified`]
1039 (https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_unspecified)
1040 * [`IpAddr::is_loopback`]
1041 (https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_loopback)
1042 * [`IpAddr::is_multicast`]
1043 (https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_multicast)
1044 * [`Ipv4Addr::is_unspecified`]
1045 (https://doc.rust-lang.org/std/net/struct.Ipv4Addr.html#method.is_unspecified)
1046 * [`Ipv6Addr::octets`]
1047 (https://doc.rust-lang.org/std/net/struct.Ipv6Addr.html#method.octets)
1048 * [`LinkedList::contains`]
1049 (https://doc.rust-lang.org/std/collections/linked_list/struct.LinkedList.html#method.contains)
1050 * [`VecDeque::contains`]
1051 (https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.contains)
1052 * [`ExitStatusExt::from_raw`]
1053 (https://doc.rust-lang.org/std/os/unix/process/trait.ExitStatusExt.html#tymethod.from_raw).
1054 Both on Unix and Windows.
1055 * [`Receiver::recv_timeout`]
1056 (https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.recv_timeout)
1057 * [`RecvTimeoutError`]
1058 (https://doc.rust-lang.org/std/sync/mpsc/enum.RecvTimeoutError.html)
1059 * [`BinaryHeap::peek_mut`]
1060 (https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.peek_mut)
1062 (https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html)
1064 (https://doc.rust-lang.org/std/iter/trait.Product.html)
1066 (https://doc.rust-lang.org/std/iter/trait.Sum.html)
1067 * [`OccupiedEntry::remove_entry`]
1068 (https://doc.rust-lang.org/std/collections/btree_map/struct.OccupiedEntry.html#method.remove_entry)
1069 * [`VacantEntry::into_key`]
1070 (https://doc.rust-lang.org/std/collections/btree_map/struct.VacantEntry.html#method.into_key)
1075 * [The `format!` macro and friends now allow a single argument to be formatted
1077 (https://github.com/rust-lang/rust/pull/33642)
1078 * [The lifetime bounds on `[T]::binary_search_by` and
1079 `[T]::binary_search_by_key` have been adjusted to be more flexible]
1080 (https://github.com/rust-lang/rust/pull/34762)
1081 * [`Option` implements `From` for its contained type]
1082 (https://github.com/rust-lang/rust/pull/34828)
1083 * [`Cell`, `RefCell` and `UnsafeCell` implement `From` for their contained type]
1084 (https://github.com/rust-lang/rust/pull/35392)
1085 * [`RwLock` panics if the reader count overflows]
1086 (https://github.com/rust-lang/rust/pull/35378)
1087 * [`vec_deque::Drain`, `hash_map::Drain` and `hash_set::Drain` are covariant]
1088 (https://github.com/rust-lang/rust/pull/35354)
1089 * [`vec::Drain` and `binary_heap::Drain` are covariant]
1090 (https://github.com/rust-lang/rust/pull/34951)
1091 * [`Cow<str>` implements `FromIterator` for `char`, `&str` and `String`]
1092 (https://github.com/rust-lang/rust/pull/35064)
1093 * [Sockets on Linux are correctly closed in subprocesses via `SOCK_CLOEXEC`]
1094 (https://github.com/rust-lang/rust/pull/34946)
1095 * [`hash_map::Entry`, `hash_map::VacantEntry` and `hash_map::OccupiedEntry`
1097 (https://github.com/rust-lang/rust/pull/34937)
1098 * [`btree_map::Entry`, `btree_map::VacantEntry` and `btree_map::OccupiedEntry`
1100 (https://github.com/rust-lang/rust/pull/34885)
1101 * [`String` implements `AddAssign`]
1102 (https://github.com/rust-lang/rust/pull/34890)
1103 * [Variadic `extern fn` pointers implement the `Clone`, `PartialEq`, `Eq`,
1104 `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and `fmt::Debug` traits]
1105 (https://github.com/rust-lang/rust/pull/34879)
1106 * [`FileType` implements `Debug`]
1107 (https://github.com/rust-lang/rust/pull/34757)
1108 * [References to `Mutex` and `RwLock` are unwind-safe]
1109 (https://github.com/rust-lang/rust/pull/34756)
1110 * [`mpsc::sync_channel` `Receiver`s return any available message before
1111 reporting a disconnect]
1112 (https://github.com/rust-lang/rust/pull/34731)
1113 * [Unicode definitions have been updated to 9.0]
1114 (https://github.com/rust-lang/rust/pull/34599)
1115 * [`env` iterators implement `DoubleEndedIterator`]
1116 (https://github.com/rust-lang/rust/pull/33312)
1121 * [Support local mirrors of registries]
1122 (https://github.com/rust-lang/cargo/pull/2857)
1123 * [Add support for command aliases]
1124 (https://github.com/rust-lang/cargo/pull/2679)
1125 * [Allow `opt-level="s"` / `opt-level="z"` in profile overrides]
1126 (https://github.com/rust-lang/cargo/pull/3007)
1127 * [Make `cargo doc --open --target` work as expected]
1128 (https://github.com/rust-lang/cargo/pull/2988)
1129 * [Speed up noop registry updates]
1130 (https://github.com/rust-lang/cargo/pull/2974)
1132 (https://github.com/rust-lang/cargo/pull/2971)
1133 * [Fix `--panic=abort` with plugins]
1134 (https://github.com/rust-lang/cargo/pull/2954)
1135 * [Always pass `-C metadata` to the compiler]
1136 (https://github.com/rust-lang/cargo/pull/2946)
1137 * [Fix depending on git repos with workspaces]
1138 (https://github.com/rust-lang/cargo/pull/2938)
1139 * [Add a `--lib` flag to `cargo new`]
1140 (https://github.com/rust-lang/cargo/pull/2921)
1141 * [Add `http.cainfo` for custom certs]
1142 (https://github.com/rust-lang/cargo/pull/2917)
1143 * [Indicate the compilation profile after compiling]
1144 (https://github.com/rust-lang/cargo/pull/2909)
1145 * [Allow enabling features for dependencies with `--features`]
1146 (https://github.com/rust-lang/cargo/pull/2876)
1147 * [Add `--jobs` flag to `cargo package`]
1148 (https://github.com/rust-lang/cargo/pull/2867)
1149 * [Add `--dry-run` to `cargo publish`]
1150 (https://github.com/rust-lang/cargo/pull/2849)
1151 * [Add support for `RUSTDOCFLAGS`]
1152 (https://github.com/rust-lang/cargo/pull/2794)
1157 * [`panic::catch_unwind` is more optimized]
1158 (https://github.com/rust-lang/rust/pull/35444)
1159 * [`panic::catch_unwind` no longer accesses thread-local storage on entry]
1160 (https://github.com/rust-lang/rust/pull/34866)
1165 * [Test binaries now support a `--test-threads` argument to specify the number
1166 of threads used to run tests, and which acts the same as the
1167 `RUST_TEST_THREADS` environment variable]
1168 (https://github.com/rust-lang/rust/pull/35414)
1169 * [The test runner now emits a warning when tests run over 60 seconds]
1170 (https://github.com/rust-lang/rust/pull/35405)
1171 * [rustdoc: Fix methods in search results]
1172 (https://github.com/rust-lang/rust/pull/34752)
1173 * [`rust-lldb` warns about unsupported versions of LLDB]
1174 (https://github.com/rust-lang/rust/pull/34646)
1175 * [Rust releases now come with source packages that can be installed by rustup
1176 via `rustup component add rust-src`]
1177 (https://github.com/rust-lang/rust/pull/34366).
1178 The resulting source code can be used by tools and IDES, located in the
1179 sysroot under `lib/rustlib/src`.
1184 * [The compiler can now be built against LLVM 3.9]
1185 (https://github.com/rust-lang/rust/pull/35594)
1186 * Many minor improvements to the documentation.
1187 * [The Rust exception handling "personality" routine is now written in Rust]
1188 (https://github.com/rust-lang/rust/pull/34832)
1193 * [When printing Windows `OsStr`s, unpaired surrogate codepoints are escaped
1194 with the lowercase format instead of the uppercase]
1195 (https://github.com/rust-lang/rust/pull/35084)
1196 * [When formatting strings, if "precision" is specified, the "fill",
1197 "align" and "width" specifiers are no longer ignored]
1198 (https://github.com/rust-lang/rust/pull/34544)
1199 * [The `Debug` impl for strings no longer escapes all non-ASCII characters]
1200 (https://github.com/rust-lang/rust/pull/34485)
1203 Version 1.11.0 (2016-08-18)
1204 ===========================
1209 * [`cfg_attr` works on `path` attributes]
1210 (https://github.com/rust-lang/rust/pull/34546)
1211 * [Support nested `cfg_attr` attributes]
1212 (https://github.com/rust-lang/rust/pull/34216)
1213 * [Allow statement-generating braced macro invocations at the end of blocks]
1214 (https://github.com/rust-lang/rust/pull/34436)
1215 * [Macros can be expanded inside of trait definitions]
1216 (https://github.com/rust-lang/rust/pull/34213)
1217 * [`#[macro_use]` works properly when it is itself expanded from a macro]
1218 (https://github.com/rust-lang/rust/pull/34032)
1223 * [`BinaryHeap::append`]
1224 (https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.append)
1225 * [`BTreeMap::append`]
1226 (https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.append)
1227 * [`BTreeMap::split_off`]
1228 (https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.split_off)
1229 * [`BTreeSet::append`]
1230 (https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.append)
1231 * [`BTreeSet::split_off`]
1232 (https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.split_off)
1233 * [`f32::to_degrees`]
1234 (https://doc.rust-lang.org/std/primitive.f32.html#method.to_degrees)
1235 (in libcore - previously stabilized in libstd)
1236 * [`f32::to_radians`]
1237 (https://doc.rust-lang.org/std/primitive.f32.html#method.to_radians)
1238 (in libcore - previously stabilized in libstd)
1239 * [`f64::to_degrees`]
1240 (https://doc.rust-lang.org/std/primitive.f64.html#method.to_degrees)
1241 (in libcore - previously stabilized in libstd)
1242 * [`f64::to_radians`]
1243 (https://doc.rust-lang.org/std/primitive.f64.html#method.to_radians)
1244 (in libcore - previously stabilized in libstd)
1246 (https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
1247 * [`Iterator::product`]
1248 (https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
1250 (https://doc.rust-lang.org/std/cell/struct.Cell.html#method.get_mut)
1251 * [`RefCell::get_mut`]
1252 (https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.get_mut)
1257 * [The `thread_local!` macro supports multiple definitions in a single
1258 invocation, and can apply attributes]
1259 (https://github.com/rust-lang/rust/pull/34077)
1260 * [`Cow` implements `Default`]
1261 (https://github.com/rust-lang/rust/pull/34305)
1262 * [`Wrapping` implements binary, octal, lower-hex and upper-hex
1263 `Display` formatting]
1264 (https://github.com/rust-lang/rust/pull/34190)
1265 * [The range types implement `Hash`]
1266 (https://github.com/rust-lang/rust/pull/34180)
1267 * [`lookup_host` ignores unknown address types]
1268 (https://github.com/rust-lang/rust/pull/34067)
1269 * [`assert_eq!` accepts a custom error message, like `assert!` does]
1270 (https://github.com/rust-lang/rust/pull/33976)
1271 * [The main thread is now called "main" instead of "<main>"]
1272 (https://github.com/rust-lang/rust/pull/33803)
1277 * [Disallow specifying features of transitive deps]
1278 (https://github.com/rust-lang/cargo/pull/2821)
1279 * [Add color support for Windows consoles]
1280 (https://github.com/rust-lang/cargo/pull/2804)
1281 * [Fix `harness = false` on `[lib]` sections]
1282 (https://github.com/rust-lang/cargo/pull/2795)
1283 * [Don't panic when `links` contains a '.']
1284 (https://github.com/rust-lang/cargo/pull/2787)
1285 * [Build scripts can emit warnings]
1286 (https://github.com/rust-lang/cargo/pull/2630),
1287 and `-vv` prints warnings for all crates.
1288 * [Ignore file locks on OS X NFS mounts]
1289 (https://github.com/rust-lang/cargo/pull/2720)
1290 * [Don't warn about `package.metadata` keys]
1291 (https://github.com/rust-lang/cargo/pull/2668).
1292 This provides room for expansion by arbitrary tools.
1293 * [Add support for cdylib crate types]
1294 (https://github.com/rust-lang/cargo/pull/2741)
1295 * [Prevent publishing crates when files are dirty]
1296 (https://github.com/rust-lang/cargo/pull/2781)
1297 * [Don't fetch all crates on clean]
1298 (https://github.com/rust-lang/cargo/pull/2704)
1299 * [Propagate --color option to rustc]
1300 (https://github.com/rust-lang/cargo/pull/2779)
1301 * [Fix `cargo doc --open` on Windows]
1302 (https://github.com/rust-lang/cargo/pull/2780)
1303 * [Improve autocompletion]
1304 (https://github.com/rust-lang/cargo/pull/2772)
1305 * [Configure colors of stderr as well as stdout]
1306 (https://github.com/rust-lang/cargo/pull/2739)
1311 * [Caching projections speeds up type check dramatically for some
1313 (https://github.com/rust-lang/rust/pull/33816)
1314 * [The default `HashMap` hasher is SipHash 1-3 instead of SipHash 2-4]
1315 (https://github.com/rust-lang/rust/pull/33940)
1316 This hasher is faster, but is believed to provide sufficient
1317 protection from collision attacks.
1318 * [Comparison of `Ipv4Addr` is 10x faster]
1319 (https://github.com/rust-lang/rust/pull/33891)
1324 * [Fix empty implementation section on some module pages]
1325 (https://github.com/rust-lang/rust/pull/34536)
1326 * [Fix inlined renamed reexports in import lists]
1327 (https://github.com/rust-lang/rust/pull/34479)
1328 * [Fix search result layout for enum variants and struct fields]
1329 (https://github.com/rust-lang/rust/pull/34477)
1330 * [Fix issues with source links to external crates]
1331 (https://github.com/rust-lang/rust/pull/34387)
1332 * [Fix redirect pages for renamed reexports]
1333 (https://github.com/rust-lang/rust/pull/34245)
1338 * [rustc is better at finding the MSVC toolchain]
1339 (https://github.com/rust-lang/rust/pull/34492)
1340 * [When emitting debug info, rustc emits frame pointers for closures,
1341 shims and glue, as it does for all other functions]
1342 (https://github.com/rust-lang/rust/pull/33909)
1343 * [rust-lldb warns about unsupported versions of LLDB]
1344 (https://github.com/rust-lang/rust/pull/34646)
1345 * Many more errors have been given error codes and extended
1347 * API documentation continues to be improved, with many new examples
1352 * [rustc no longer hangs when dependencies recursively re-export
1354 (https://github.com/rust-lang/rust/pull/34542)
1355 * [rustc requires LLVM 3.7+]
1356 (https://github.com/rust-lang/rust/pull/34104)
1357 * [The 'How Safe and Unsafe Interact' chapter of The Rustonomicon was
1359 (https://github.com/rust-lang/rust/pull/33895)
1360 * [rustc support 16-bit pointer sizes]
1361 (https://github.com/rust-lang/rust/pull/33460).
1362 No targets use this yet, but it works toward AVR support.
1367 * [`const`s and `static`s may not have unsized types]
1368 (https://github.com/rust-lang/rust/pull/34443)
1369 * [The new follow-set rules that place restrictions on `macro_rules!`
1370 in order to ensure syntax forward-compatibility have been enabled]
1371 (https://github.com/rust-lang/rust/pull/33982)
1372 This was an [ammendment to RFC 550]
1373 (https://github.com/rust-lang/rfcs/pull/1384),
1374 and has been a warning since 1.10.
1375 * [`cfg` attribute process has been refactored to fix various bugs]
1376 (https://github.com/rust-lang/rust/pull/33706).
1377 This causes breakage in some corner cases.
1380 Version 1.10.0 (2016-07-07)
1381 ===========================
1386 * [Allow `concat_idents!` in type positions as well as in expression
1388 (https://github.com/rust-lang/rust/pull/33735).
1389 * [`Copy` types are required to have a trivial implementation of `Clone`]
1390 (https://github.com/rust-lang/rust/pull/33420).
1391 [RFC 1521](https://github.com/rust-lang/rfcs/blob/master/text/1521-copy-clone-semantics.md).
1392 * [Single-variant enums support the `#[repr(..)]` attribute]
1393 (https://github.com/rust-lang/rust/pull/33355).
1394 * [Fix `#[derive(RustcEncodable)]` in the presence of other `encode` methods]
1395 (https://github.com/rust-lang/rust/pull/32908).
1396 * [`panic!` can be converted to a runtime abort with the
1397 `-C panic=abort` flag]
1398 (https://github.com/rust-lang/rust/pull/32900).
1399 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
1400 * [Add a new crate type, 'cdylib']
1401 (https://github.com/rust-lang/rust/pull/33553).
1402 cdylibs are dynamic libraries suitable for loading by non-Rust hosts.
1403 [RFC 1510](https://github.com/rust-lang/rfcs/blob/master/text/1510-rdylib.md).
1404 Note that Cargo does not yet directly support cdylibs.
1409 * `os::windows::fs::OpenOptionsExt::access_mode`
1410 * `os::windows::fs::OpenOptionsExt::share_mode`
1411 * `os::windows::fs::OpenOptionsExt::custom_flags`
1412 * `os::windows::fs::OpenOptionsExt::attributes`
1413 * `os::windows::fs::OpenOptionsExt::security_qos_flags`
1414 * `os::unix::fs::OpenOptionsExt::custom_flags`
1415 * [`sync::Weak::new`]
1416 (http://doc.rust-lang.org/alloc/arc/struct.Weak.html#method.new)
1417 * `Default for sync::Weak`
1418 * [`panic::set_hook`]
1419 (http://doc.rust-lang.org/std/panic/fn.set_hook.html)
1420 * [`panic::take_hook`]
1421 (http://doc.rust-lang.org/std/panic/fn.take_hook.html)
1422 * [`panic::PanicInfo`]
1423 (http://doc.rust-lang.org/std/panic/struct.PanicInfo.html)
1424 * [`panic::PanicInfo::payload`]
1425 (http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.payload)
1426 * [`panic::PanicInfo::location`]
1427 (http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.location)
1428 * [`panic::Location`]
1429 (http://doc.rust-lang.org/std/panic/struct.Location.html)
1430 * [`panic::Location::file`]
1431 (http://doc.rust-lang.org/std/panic/struct.Location.html#method.file)
1432 * [`panic::Location::line`]
1433 (http://doc.rust-lang.org/std/panic/struct.Location.html#method.line)
1434 * [`ffi::CStr::from_bytes_with_nul`]
1435 (http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul)
1436 * [`ffi::CStr::from_bytes_with_nul_unchecked`]
1437 (http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul_unchecked)
1438 * [`ffi::FromBytesWithNulError`]
1439 (http://doc.rust-lang.org/std/ffi/struct.FromBytesWithNulError.html)
1440 * [`fs::Metadata::modified`]
1441 (http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.modified)
1442 * [`fs::Metadata::accessed`]
1443 (http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.accessed)
1444 * [`fs::Metadata::created`]
1445 (http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.created)
1446 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange`
1447 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange_weak`
1448 * `collections::{btree,hash}_map::{Occupied,Vacant,}Entry::key`
1449 * `os::unix::net::{UnixStream, UnixListener, UnixDatagram, SocketAddr}`
1450 * [`SocketAddr::is_unnamed`]
1451 (http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.is_unnamed)
1452 * [`SocketAddr::as_pathname`]
1453 (http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.as_pathname)
1454 * [`UnixStream::connect`]
1455 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.connect)
1456 * [`UnixStream::pair`]
1457 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.pair)
1458 * [`UnixStream::try_clone`]
1459 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.try_clone)
1460 * [`UnixStream::local_addr`]
1461 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.local_addr)
1462 * [`UnixStream::peer_addr`]
1463 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.peer_addr)
1464 * [`UnixStream::set_read_timeout`]
1465 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
1466 * [`UnixStream::set_write_timeout`]
1467 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
1468 * [`UnixStream::read_timeout`]
1469 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
1470 * [`UnixStream::write_timeout`]
1471 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
1472 * [`UnixStream::set_nonblocking`]
1473 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.set_nonblocking)
1474 * [`UnixStream::take_error`]
1475 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.take_error)
1476 * [`UnixStream::shutdown`]
1477 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.shutdown)
1478 * Read/Write/RawFd impls for `UnixStream`
1479 * [`UnixListener::bind`]
1480 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.bind)
1481 * [`UnixListener::accept`]
1482 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.accept)
1483 * [`UnixListener::try_clone`]
1484 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.try_clone)
1485 * [`UnixListener::local_addr`]
1486 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.local_addr)
1487 * [`UnixListener::set_nonblocking`]
1488 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.set_nonblocking)
1489 * [`UnixListener::take_error`]
1490 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.take_error)
1491 * [`UnixListener::incoming`]
1492 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.incoming)
1493 * RawFd impls for `UnixListener`
1494 * [`UnixDatagram::bind`]
1495 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.bind)
1496 * [`UnixDatagram::unbound`]
1497 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.unbound)
1498 * [`UnixDatagram::pair`]
1499 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.pair)
1500 * [`UnixDatagram::connect`]
1501 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.connect)
1502 * [`UnixDatagram::try_clone`]
1503 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.try_clone)
1504 * [`UnixDatagram::local_addr`]
1505 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.local_addr)
1506 * [`UnixDatagram::peer_addr`]
1507 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.peer_addr)
1508 * [`UnixDatagram::recv_from`]
1509 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv_from)
1510 * [`UnixDatagram::recv`]
1511 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv)
1512 * [`UnixDatagram::send_to`]
1513 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send_to)
1514 * [`UnixDatagram::send`]
1515 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send)
1516 * [`UnixDatagram::set_read_timeout`]
1517 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_read_timeout)
1518 * [`UnixDatagram::set_write_timeout`]
1519 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_write_timeout)
1520 * [`UnixDatagram::read_timeout`]
1521 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.read_timeout)
1522 * [`UnixDatagram::write_timeout`]
1523 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.write_timeout)
1524 * [`UnixDatagram::set_nonblocking`]
1525 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_nonblocking)
1526 * [`UnixDatagram::take_error`]
1527 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.take_error)
1528 * [`UnixDatagram::shutdown`]
1529 (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.shutdown)
1530 * RawFd impls for `UnixDatagram`
1531 * `{BTree,Hash}Map::values_mut`
1532 * [`<[_]>::binary_search_by_key`]
1533 (http://doc.rust-lang.org/beta/std/primitive.slice.html#method.binary_search_by_key)
1538 * [The `abs_sub` method of floats is deprecated]
1539 (https://github.com/rust-lang/rust/pull/33664).
1540 The semantics of this minor method are subtle and probably not what
1542 * [Add implementation of Ord for Cell<T> and RefCell<T> where T: Ord]
1543 (https://github.com/rust-lang/rust/pull/33306).
1544 * [On Linux, if `HashMap`s can't be initialized with `getrandom` they
1545 will fall back to `/dev/urandom` temporarily to avoid blocking
1547 (https://github.com/rust-lang/rust/pull/33086).
1548 * [Implemented negation for wrapping numerals]
1549 (https://github.com/rust-lang/rust/pull/33067).
1550 * [Implement `Clone` for `binary_heap::IntoIter`]
1551 (https://github.com/rust-lang/rust/pull/33050).
1552 * [Implement `Display` and `Hash` for `std::num::Wrapping`]
1553 (https://github.com/rust-lang/rust/pull/33023).
1554 * [Add `Default` implementation for `&CStr`, `CString`]
1555 (https://github.com/rust-lang/rust/pull/32990).
1556 * [Implement `From<Vec<T>>` and `Into<Vec<T>>` for `VecDeque<T>`]
1557 (https://github.com/rust-lang/rust/pull/32866).
1558 * [Implement `Default` for `UnsafeCell`, `fmt::Error`, `Condvar`,
1560 (https://github.com/rust-lang/rust/pull/32785).
1564 * [Cargo.toml supports the `profile.*.panic` option]
1565 (https://github.com/rust-lang/cargo/pull/2687).
1566 This controls the runtime behavior of the `panic!` macro
1567 and can be either "unwind" (the default), or "abort".
1568 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
1569 * [Don't throw away errors with `-p` arguments]
1570 (https://github.com/rust-lang/cargo/pull/2723).
1571 * [Report status to stderr instead of stdout]
1572 (https://github.com/rust-lang/cargo/pull/2693).
1573 * [Build scripts are passed a `CARGO_MANIFEST_LINKS` environment
1574 variable that corresponds to the `links` field of the manifest]
1575 (https://github.com/rust-lang/cargo/pull/2710).
1576 * [Ban keywords from crate names]
1577 (https://github.com/rust-lang/cargo/pull/2707).
1578 * [Canonicalize `CARGO_HOME` on Windows]
1579 (https://github.com/rust-lang/cargo/pull/2604).
1580 * [Retry network requests]
1581 (https://github.com/rust-lang/cargo/pull/2396).
1582 By default they are retried twice, which can be customized with the
1583 `net.retry` value in `.cargo/config`.
1584 * [Don't print extra error info for failing subcommands]
1585 (https://github.com/rust-lang/cargo/pull/2674).
1586 * [Add `--force` flag to `cargo install`]
1587 (https://github.com/rust-lang/cargo/pull/2405).
1588 * [Don't use `flock` on NFS mounts]
1589 (https://github.com/rust-lang/cargo/pull/2623).
1590 * [Prefer building `cargo install` artifacts in temporary directories]
1591 (https://github.com/rust-lang/cargo/pull/2610).
1592 Makes it possible to install multiple crates in parallel.
1593 * [Add `cargo test --doc`]
1594 (https://github.com/rust-lang/cargo/pull/2578).
1595 * [Add `cargo --explain`]
1596 (https://github.com/rust-lang/cargo/pull/2551).
1597 * [Don't print warnings when `-q` is passed]
1598 (https://github.com/rust-lang/cargo/pull/2576).
1599 * [Add `cargo doc --lib` and `--bin`]
1600 (https://github.com/rust-lang/cargo/pull/2577).
1601 * [Don't require build script output to be UTF-8]
1602 (https://github.com/rust-lang/cargo/pull/2560).
1603 * [Correctly attempt multiple git usernames]
1604 (https://github.com/rust-lang/cargo/pull/2584).
1609 * [rustc memory usage was reduced by refactoring the context used for
1611 (https://github.com/rust-lang/rust/pull/33425).
1612 * [Speed up creation of `HashMap`s by caching the random keys used
1613 to initialize the hash state]
1614 (https://github.com/rust-lang/rust/pull/33318).
1615 * [The `find` implementation for `Chain` iterators is 2x faster]
1616 (https://github.com/rust-lang/rust/pull/33289).
1617 * [Trait selection optimizations speed up type checking by 15%]
1618 (https://github.com/rust-lang/rust/pull/33138).
1619 * [Efficient trie lookup for boolean Unicode properties]
1620 (https://github.com/rust-lang/rust/pull/33098).
1621 10x faster than the previous lookup tables.
1622 * [Special case `#[derive(Copy, Clone)]` to avoid bloat]
1623 (https://github.com/rust-lang/rust/pull/31414).
1628 * Many incremental improvements to documentation and rustdoc.
1629 * [rustdoc: List blanket trait impls]
1630 (https://github.com/rust-lang/rust/pull/33514).
1631 * [rustdoc: Clean up ABI rendering]
1632 (https://github.com/rust-lang/rust/pull/33151).
1633 * [Indexing with the wrong type produces a more informative error]
1634 (https://github.com/rust-lang/rust/pull/33401).
1635 * [Improve diagnostics for constants being used in irrefutable patterns]
1636 (https://github.com/rust-lang/rust/pull/33406).
1637 * [When many method candidates are in scope limit the suggestions to 10]
1638 (https://github.com/rust-lang/rust/pull/33338).
1639 * [Remove confusing suggestion when calling a `fn` type]
1640 (https://github.com/rust-lang/rust/pull/33325).
1641 * [Do not suggest changing `&mut self` to `&mut mut self`]
1642 (https://github.com/rust-lang/rust/pull/33319).
1647 * [Update i686-linux-android features to match Android ABI]
1648 (https://github.com/rust-lang/rust/pull/33651).
1649 * [Update aarch64-linux-android features to match Android ABI]
1650 (https://github.com/rust-lang/rust/pull/33500).
1651 * [`std` no longer prints backtraces on platforms where the running
1652 module must be loaded with `env::current_exe`, which can't be relied
1653 on](https://github.com/rust-lang/rust/pull/33554).
1654 * This release includes std binaries for the i586-unknown-linux-gnu,
1655 i686-unknown-linux-musl, and armv7-linux-androideabi targets. The
1656 i586 target is for old x86 hardware without SSE2, and the armv7
1657 target is for Android running on modern ARM architectures.
1658 * [The `rust-gdb` and `rust-lldb` scripts are distributed on all
1659 Unix platforms](https://github.com/rust-lang/rust/pull/32835).
1660 * [On Unix the runtime aborts by calling `libc::abort` instead of
1661 generating an illegal instruction]
1662 (https://github.com/rust-lang/rust/pull/31457).
1663 * [Rust is now bootstrapped from the previous release of Rust,
1664 instead of a snapshot from an arbitrary commit]
1665 (https://github.com/rust-lang/rust/pull/32942).
1670 * [`AtomicBool` is now bool-sized, not word-sized]
1671 (https://github.com/rust-lang/rust/pull/33579).
1672 * [`target_env` for Linux ARM targets is just `gnu`, not
1673 `gnueabihf`, `gnueabi`, etc]
1674 (https://github.com/rust-lang/rust/pull/33403).
1675 * [Consistently panic on overflow in `Duration::new`]
1676 (https://github.com/rust-lang/rust/pull/33072).
1677 * [Change `String::truncate` to panic less]
1678 (https://github.com/rust-lang/rust/pull/32977).
1679 * [Add `:block` to the follow set for `:ty` and `:path`]
1680 (https://github.com/rust-lang/rust/pull/32945).
1681 Affects how macros are parsed.
1682 * [Fix macro hygiene bug]
1683 (https://github.com/rust-lang/rust/pull/32923).
1684 * [Feature-gated attributes on macro-generated macro invocations are
1686 (https://github.com/rust-lang/rust/pull/32791).
1687 * [Suppress fallback and ambiguity errors during type inference]
1688 (https://github.com/rust-lang/rust/pull/32258).
1689 This caused some minor changes to type inference.
1692 Version 1.9.0 (2016-05-26)
1693 ==========================
1698 * The `#[deprecated]` attribute when applied to an API will generate
1699 warnings when used. The warnings may be suppressed with
1700 `#[allow(deprecated)]`. [RFC 1270].
1701 * [`fn` item types are zero sized, and each `fn` names a unique
1702 type][1.9fn]. This will break code that transmutes `fn`s, so calling
1703 `transmute` on a `fn` type will generate a warning for a few cycles,
1704 then will be converted to an error.
1705 * [Field and method resolution understand visibility, so private
1706 fields and methods cannot prevent the proper use of public fields
1707 and methods][1.9fv].
1708 * [The parser considers unicode codepoints in the
1709 `PATTERN_WHITE_SPACE` category to be whitespace][1.9ws].
1715 * [`std::panic::catch_unwind`][] (renamed from `recover`)
1716 * [`std::panic::resume_unwind`][] (renamed from `propagate`)
1717 * [`std::panic::AssertUnwindSafe`][] (renamed from `AssertRecoverSafe`)
1718 * [`std::panic::UnwindSafe`][] (renamed from `RecoverSafe`)
1719 * [`str::is_char_boundary`]
1720 * [`<*const T>::as_ref`]
1721 * [`<*mut T>::as_ref`]
1722 * [`<*mut T>::as_mut`]
1723 * [`AsciiExt::make_ascii_uppercase`]
1724 * [`AsciiExt::make_ascii_lowercase`]
1725 * [`char::decode_utf16`]
1726 * [`char::DecodeUtf16`]
1727 * [`char::DecodeUtf16Error`]
1728 * [`char::DecodeUtf16Error::unpaired_surrogate`]
1729 * [`BTreeSet::take`]
1730 * [`BTreeSet::replace`]
1733 * [`HashSet::replace`]
1735 * [`OsString::with_capacity`]
1736 * [`OsString::clear`]
1737 * [`OsString::capacity`]
1738 * [`OsString::reserve`]
1739 * [`OsString::reserve_exact`]
1740 * [`OsStr::is_empty`]
1742 * [`std::os::unix::thread`]
1745 * [`JoinHandleExt::as_pthread_t`]
1746 * [`JoinHandleExt::into_pthread_t`]
1747 * [`HashSet::hasher`]
1748 * [`HashMap::hasher`]
1749 * [`CommandExt::exec`]
1750 * [`File::try_clone`]
1751 * [`SocketAddr::set_ip`]
1752 * [`SocketAddr::set_port`]
1753 * [`SocketAddrV4::set_ip`]
1754 * [`SocketAddrV4::set_port`]
1755 * [`SocketAddrV6::set_ip`]
1756 * [`SocketAddrV6::set_port`]
1757 * [`SocketAddrV6::set_flowinfo`]
1758 * [`SocketAddrV6::set_scope_id`]
1759 * [`slice::copy_from_slice`]
1760 * [`ptr::read_volatile`]
1761 * [`ptr::write_volatile`]
1762 * [`OpenOptions::create_new`]
1763 * [`TcpStream::set_nodelay`]
1764 * [`TcpStream::nodelay`]
1765 * [`TcpStream::set_ttl`]
1766 * [`TcpStream::ttl`]
1767 * [`TcpStream::set_only_v6`]
1768 * [`TcpStream::only_v6`]
1769 * [`TcpStream::take_error`]
1770 * [`TcpStream::set_nonblocking`]
1771 * [`TcpListener::set_ttl`]
1772 * [`TcpListener::ttl`]
1773 * [`TcpListener::set_only_v6`]
1774 * [`TcpListener::only_v6`]
1775 * [`TcpListener::take_error`]
1776 * [`TcpListener::set_nonblocking`]
1777 * [`UdpSocket::set_broadcast`]
1778 * [`UdpSocket::broadcast`]
1779 * [`UdpSocket::set_multicast_loop_v4`]
1780 * [`UdpSocket::multicast_loop_v4`]
1781 * [`UdpSocket::set_multicast_ttl_v4`]
1782 * [`UdpSocket::multicast_ttl_v4`]
1783 * [`UdpSocket::set_multicast_loop_v6`]
1784 * [`UdpSocket::multicast_loop_v6`]
1785 * [`UdpSocket::set_multicast_ttl_v6`]
1786 * [`UdpSocket::multicast_ttl_v6`]
1787 * [`UdpSocket::set_ttl`]
1788 * [`UdpSocket::ttl`]
1789 * [`UdpSocket::set_only_v6`]
1790 * [`UdpSocket::only_v6`]
1791 * [`UdpSocket::join_multicast_v4`]
1792 * [`UdpSocket::join_multicast_v6`]
1793 * [`UdpSocket::leave_multicast_v4`]
1794 * [`UdpSocket::leave_multicast_v6`]
1795 * [`UdpSocket::take_error`]
1796 * [`UdpSocket::connect`]
1797 * [`UdpSocket::send`]
1798 * [`UdpSocket::recv`]
1799 * [`UdpSocket::set_nonblocking`]
1804 * [`std::sync::Once` is poisoned if its initialization function
1806 * [`cell::Ref` and `cell::RefMut` can contain unsized types][1.9cu].
1807 * [Most types implement `fmt::Debug`][1.9db].
1808 * [The default buffer size used by `BufReader` and `BufWriter` was
1809 reduced to 8K, from 64K][1.9bf]. This is in line with the buffer size
1810 used by other languages.
1811 * [`Instant`, `SystemTime` and `Duration` implement `+=` and `-=`.
1812 `Duration` additionally implements `*=` and `/=`][1.9ta].
1813 * [`Skip` is a `DoubleEndedIterator`][1.9sk].
1814 * [`From<[u8; 4]>` is implemented for `Ipv4Addr`][1.9fi].
1815 * [`Chain` implements `BufRead`][1.9ch].
1816 * [`HashMap`, `HashSet` and iterators are covariant][1.9hc].
1821 * [Cargo can now run concurrently][1.9cc].
1822 * [Top-level overrides allow specific revisions of crates to be
1823 overridden through the entire crate graph][1.9ct]. This is intended
1824 to make upgrades easier for large projects, by allowing crates to be
1825 forked temporarily until they've been upgraded and republished.
1826 * [Cargo exports a `CARGO_PKG_AUTHORS` environment variable][1.9cp].
1827 * [Cargo will pass the contents of the `RUSTFLAGS` variable to `rustc`
1828 on the commandline][1.9cf]. `rustc` arguments can also be specified
1829 in the `build.rustflags` configuration key.
1834 * [The time complexity of comparing variables for equivalence during type
1835 unification is reduced from _O_(_n_!) to _O_(_n_)][1.9tu]. This leads
1836 to major compilation time improvement in some scenarios.
1837 * [`ToString` is specialized for `str`, giving it the same performance
1838 as `to_owned`][1.9ts].
1839 * [Spawning processes with `Command::output` no longer creates extra
1841 * [`#[derive(PartialEq)]` and `#[derive(PartialOrd)]` emit less code
1842 for C-like enums][1.9cl].
1847 * [Passing the `--quiet` flag to a test runner will produce
1848 much-abbreviated output][1.9q].
1849 * The Rust Project now publishes std binaries for the
1850 `mips-unknown-linux-musl`, `mipsel-unknown-linux-musl`, and
1851 `i586-pc-windows-msvc` targets.
1856 * [`std::sync::Once` is poisoned if its initialization function
1858 * [It is illegal to define methods with the same name in overlapping
1859 inherent `impl` blocks][1.9sn].
1860 * [`fn` item types are zero sized, and each `fn` names a unique
1861 type][1.9fn]. This will break code that transmutes `fn`s, so calling
1862 `transmute` on a `fn` type will generate a warning for a few cycles,
1863 then will be converted to an error.
1864 * [Improvements to const evaluation may trigger new errors when integer
1865 literals are out of range][1.9ce].
1868 [1.9bf]: https://github.com/rust-lang/rust/pull/32695
1869 [1.9cc]: https://github.com/rust-lang/cargo/pull/2486
1870 [1.9ce]: https://github.com/rust-lang/rust/pull/30587
1871 [1.9cf]: https://github.com/rust-lang/cargo/pull/2241
1872 [1.9ch]: https://github.com/rust-lang/rust/pull/32541
1873 [1.9cl]: https://github.com/rust-lang/rust/pull/31977
1874 [1.9cp]: https://github.com/rust-lang/cargo/pull/2465
1875 [1.9ct]: https://github.com/rust-lang/cargo/pull/2385
1876 [1.9cu]: https://github.com/rust-lang/rust/pull/32652
1877 [1.9db]: https://github.com/rust-lang/rust/pull/32054
1878 [1.9fi]: https://github.com/rust-lang/rust/pull/32050
1879 [1.9fn]: https://github.com/rust-lang/rust/pull/31710
1880 [1.9fv]: https://github.com/rust-lang/rust/pull/31938
1881 [1.9hc]: https://github.com/rust-lang/rust/pull/32635
1882 [1.9o]: https://github.com/rust-lang/rust/pull/32325
1883 [1.9q]: https://github.com/rust-lang/rust/pull/31887
1884 [1.9sk]: https://github.com/rust-lang/rust/pull/31700
1885 [1.9sn]: https://github.com/rust-lang/rust/pull/31925
1886 [1.9sp]: https://github.com/rust-lang/rust/pull/31618
1887 [1.9ta]: https://github.com/rust-lang/rust/pull/32448
1888 [1.9ts]: https://github.com/rust-lang/rust/pull/32586
1889 [1.9tu]: https://github.com/rust-lang/rust/pull/32062
1890 [1.9ws]: https://github.com/rust-lang/rust/pull/29734
1891 [RFC 1270]: https://github.com/rust-lang/rfcs/blob/master/text/1270-deprecation.md
1892 [`<*const T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
1893 [`<*mut T>::as_mut`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_mut
1894 [`<*mut T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
1895 [`slice::copy_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.copy_from_slice
1896 [`AsciiExt::make_ascii_lowercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_lowercase
1897 [`AsciiExt::make_ascii_uppercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_uppercase
1898 [`BTreeSet::get`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.get
1899 [`BTreeSet::replace`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.replace
1900 [`BTreeSet::take`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.take
1901 [`CommandExt::exec`]: http://doc.rust-lang.org/nightly/std/os/unix/process/trait.CommandExt.html#tymethod.exec
1902 [`File::try_clone`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html#method.try_clone
1903 [`HashMap::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.hasher
1904 [`HashSet::get`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.get
1905 [`HashSet::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.hasher
1906 [`HashSet::replace`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.replace
1907 [`HashSet::take`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.take
1908 [`JoinHandleExt::as_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.as_pthread_t
1909 [`JoinHandleExt::into_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.into_pthread_t
1910 [`JoinHandleExt`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html
1911 [`OpenOptions::create_new`]: http://doc.rust-lang.org/nightly/std/fs/struct.OpenOptions.html#method.create_new
1912 [`OsStr::is_empty`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.is_empty
1913 [`OsStr::len`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.len
1914 [`OsString::capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.capacity
1915 [`OsString::clear`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.clear
1916 [`OsString::reserve_exact`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve_exact
1917 [`OsString::reserve`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve
1918 [`OsString::with_capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.with_capacity
1919 [`RawPthread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/type.RawPthread.html
1920 [`SocketAddr::set_ip`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_ip
1921 [`SocketAddr::set_port`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_port
1922 [`SocketAddrV4::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_ip
1923 [`SocketAddrV4::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_port
1924 [`SocketAddrV6::set_flowinfo`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_flowinfo
1925 [`SocketAddrV6::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_ip
1926 [`SocketAddrV6::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_port
1927 [`SocketAddrV6::set_scope_id`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_scope_id
1928 [`TcpListener::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
1929 [`TcpListener::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
1930 [`TcpListener::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
1931 [`TcpListener::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
1932 [`TcpListener::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
1933 [`TcpListener::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
1934 [`TcpStream::nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.nodelay
1935 [`TcpStream::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
1936 [`TcpStream::set_nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nodelay
1937 [`TcpStream::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
1938 [`TcpStream::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
1939 [`TcpStream::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
1940 [`TcpStream::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
1941 [`TcpStream::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
1942 [`UdpSocket::broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.broadcast
1943 [`UdpSocket::connect`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.connect
1944 [`UdpSocket::join_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v4
1945 [`UdpSocket::join_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v6
1946 [`UdpSocket::leave_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v4
1947 [`UdpSocket::leave_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v6
1948 [`UdpSocket::multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v4
1949 [`UdpSocket::multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v6
1950 [`UdpSocket::multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v4
1951 [`UdpSocket::multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v6
1952 [`UdpSocket::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.only_v6
1953 [`UdpSocket::recv`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.recv
1954 [`UdpSocket::send`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.send
1955 [`UdpSocket::set_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_broadcast
1956 [`UdpSocket::set_multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v4
1957 [`UdpSocket::set_multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v6
1958 [`UdpSocket::set_multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v4
1959 [`UdpSocket::set_multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v6
1960 [`UdpSocket::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_nonblocking
1961 [`UdpSocket::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_only_v6
1962 [`UdpSocket::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_ttl
1963 [`UdpSocket::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.take_error
1964 [`UdpSocket::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.ttl
1965 [`char::DecodeUtf16Error::unpaired_surrogate`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html#method.unpaired_surrogate
1966 [`char::DecodeUtf16Error`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html
1967 [`char::DecodeUtf16`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16.html
1968 [`char::decode_utf16`]: http://doc.rust-lang.org/nightly/std/char/fn.decode_utf16.html
1969 [`ptr::read_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.read_volatile.html
1970 [`ptr::write_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.write_volatile.html
1971 [`std::os::unix::thread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/index.html
1972 [`std::panic::AssertUnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/struct.AssertUnwindSafe.html
1973 [`std::panic::UnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/trait.UnwindSafe.html
1974 [`std::panic::catch_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.catch_unwind.html
1975 [`std::panic::resume_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.resume_unwind.html
1976 [`std::panic`]: http://doc.rust-lang.org/nightly/std/panic/index.html
1977 [`str::is_char_boundary`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.is_char_boundary
1980 Version 1.8.0 (2016-04-14)
1981 ==========================
1986 * Rust supports overloading of compound assignment statements like
1987 `+=` by implementing the [`AddAssign`], [`SubAssign`],
1988 [`MulAssign`], [`DivAssign`], [`RemAssign`], [`BitAndAssign`],
1989 [`BitOrAssign`], [`BitXorAssign`], [`ShlAssign`], or [`ShrAssign`]
1991 * Empty structs can be defined with braces, as in `struct Foo { }`, in
1992 addition to the non-braced form, `struct Foo;`. [RFC 218].
1998 * [`str::encode_utf16`][] (renamed from `utf16_units`)
1999 * [`str::EncodeUtf16`][] (renamed from `Utf16Units`)
2002 * [`ptr::drop_in_place`]
2004 * [`time::SystemTime`]
2006 * [`Instant::duration_since`][] (renamed from `duration_from_earlier`)
2007 * [`Instant::elapsed`]
2008 * [`SystemTime::now`]
2009 * [`SystemTime::duration_since`][] (renamed from `duration_from_earlier`)
2010 * [`SystemTime::elapsed`]
2011 * Various `Add`/`Sub` impls for `Time` and `SystemTime`
2012 * [`SystemTimeError`]
2013 * [`SystemTimeError::duration`]
2014 * Various impls for `SystemTimeError`
2016 * [`AddAssign`], [`SubAssign`], [`MulAssign`], [`DivAssign`],
2017 [`RemAssign`], [`BitAndAssign`], [`BitOrAssign`],
2018 [`BitXorAssign`], [`ShlAssign`], [`ShrAssign`].
2019 * [The `write!` and `writeln!` macros correctly emit errors if any of
2020 their arguments can't be formatted][1.8w].
2021 * [Various I/O functions support large files on 32-bit Linux][1.8l].
2022 * [The Unix-specific `raw` modules, which contain a number of
2023 redefined C types are deprecated][1.8r], including `os::raw::unix`,
2024 `os::raw::macos`, and `os::raw::linux`. These modules defined types
2025 such as `ino_t` and `dev_t`. The inconsistency of these definitions
2026 across platforms was making it difficult to implement `std`
2027 correctly. Those that need these definitions should use the `libc`
2029 * The Unix-specific `MetadataExt` traits, including
2030 `os::unix::fs::MetadataExt`, which expose values such as inode
2031 numbers [no longer return platform-specific types][1.8r], but
2032 instead return widened integers. [RFC 1415].
2033 * [`btree_set::{IntoIter, Iter, Range}` are covariant][1.8cv].
2034 * [Atomic loads and stores are not volatile][1.8a].
2035 * [All types in `sync::mpsc` implement `fmt::Debug`][1.8mp].
2040 * [Inlining hash functions lead to a 3% compile-time improvement in
2041 some workloads][1.8h].
2042 * When using jemalloc, its symbols are [unprefixed so that it
2043 overrides the libc malloc implementation][1.8h]. This means that for
2044 rustc, LLVM is now using jemalloc, which results in a 6%
2045 compile-time improvement on a specific workload.
2046 * [Avoid quadratic growth in function size due to cleanups][1.8cu].
2051 * [32-bit MSVC builds finally implement unwinding][1.8ms].
2052 i686-pc-windows-msvc is now considered a tier-1 platform.
2053 * [The `--print targets` flag prints a list of supported targets][1.8t].
2054 * [The `--print cfg` flag prints the `cfg`s defined for the current
2056 * [`rustc` can be built with an new Cargo-based build system, written
2057 in Rust][1.8b]. It will eventually replace Rust's Makefile-based
2058 build system. To enable it configure with `configure --rustbuild`.
2059 * [Errors for non-exhaustive `match` patterns now list up to 3 missing
2060 variants while also indicating the total number of missing variants
2061 if more than 3][1.8m].
2062 * [Executable stacks are disabled on Linux and BSD][1.8nx].
2063 * The Rust Project now publishes binary releases of the standard
2064 library for a number of tier-2 targets:
2065 `armv7-unknown-linux-gnueabihf`, `powerpc-unknown-linux-gnu`,
2066 `powerpc64-unknown-linux-gnu`, `powerpc64le-unknown-linux-gnu`
2067 `x86_64-rumprun-netbsd`. These can be installed with
2068 tools such as [multirust][1.8mr].
2073 * [`cargo init` creates a new Cargo project in the current
2074 directory][1.8ci]. It is otherwise like `cargo new`.
2075 * [Cargo has configuration keys for `-v` and
2076 `--color`][1.8cc]. `verbose` and `color`, respectively, go in the
2077 `[term]` section of `.cargo/config`.
2078 * [Configuration keys that evaluate to strings or integers can be set
2079 via environment variables][1.8ce]. For example the `build.jobs` key
2080 can be set via `CARGO_BUILD_JOBS`. Environment variables take
2081 precedence over config files.
2082 * [Target-specific dependencies support Rust `cfg` syntax for
2083 describing targets][1.8cfg] so that dependencies for multiple
2084 targets can be specified together. [RFC 1361].
2085 * [The environment variables `CARGO_TARGET_ROOT`, `RUSTC`, and
2086 `RUSTDOC` take precedence over the `build.target-dir`,
2087 `build.rustc`, and `build.rustdoc` configuration values][1.8cv].
2088 * [The child process tree is killed on Windows when Cargo is
2090 * [The `build.target` configuration value sets the target platform,
2091 like `--target`][1.8ct].
2096 * [Unstable compiler flags have been further restricted][1.8u]. Since
2097 1.0 `-Z` flags have been considered unstable, and other flags that
2098 were considered unstable additionally required passing `-Z
2099 unstable-options` to access. Unlike unstable language and library
2100 features though, these options have been accessible on the stable
2101 release channel. Going forward, *new unstable flags will not be
2102 available on the stable release channel*, and old unstable flags
2103 will warn about their usage. In the future, all unstable flags will
2104 be unavailable on the stable release channel.
2105 * [It is no longer possible to `match` on empty enum variants using
2106 the `Variant(..)` syntax][1.8v]. This has been a warning since 1.6.
2107 * The Unix-specific `MetadataExt` traits, including
2108 `os::unix::fs::MetadataExt`, which expose values such as inode
2109 numbers [no longer return platform-specific types][1.8r], but
2110 instead return widened integers. [RFC 1415].
2111 * [Modules sourced from the filesystem cannot appear within arbitrary
2112 blocks, but only within other modules][1.8mf].
2113 * [`--cfg` compiler flags are parsed strictly as identifiers][1.8c].
2114 * On Unix, [stack overflow triggers a runtime abort instead of a
2116 * [`Command::spawn` and its equivalents return an error if any of
2117 its command-line arguments contain interior `NUL`s][1.8n].
2118 * [Tuple and unit enum variants from other crates are in the type
2120 * [On Windows `rustc` emits `.lib` files for the `staticlib` library
2121 type instead of `.a` files][1.8st]. Additionally, for the MSVC
2122 toolchain, `rustc` emits import libraries named `foo.dll.lib`
2123 instead of `foo.lib`.
2126 [1.8a]: https://github.com/rust-lang/rust/pull/30962
2127 [1.8b]: https://github.com/rust-lang/rust/pull/31123
2128 [1.8c]: https://github.com/rust-lang/rust/pull/31530
2129 [1.8cc]: https://github.com/rust-lang/cargo/pull/2397
2130 [1.8ce]: https://github.com/rust-lang/cargo/pull/2398
2131 [1.8cf]: https://github.com/rust-lang/rust/pull/31278
2132 [1.8cfg]: https://github.com/rust-lang/cargo/pull/2328
2133 [1.8ci]: https://github.com/rust-lang/cargo/pull/2081
2134 [1.8ck]: https://github.com/rust-lang/cargo/pull/2370
2135 [1.8ct]: https://github.com/rust-lang/cargo/pull/2335
2136 [1.8cu]: https://github.com/rust-lang/rust/pull/31390
2137 [1.8cv]: https://github.com/rust-lang/cargo/issues/2365
2138 [1.8cv]: https://github.com/rust-lang/rust/pull/30998
2139 [1.8h]: https://github.com/rust-lang/rust/pull/31460
2140 [1.8l]: https://github.com/rust-lang/rust/pull/31668
2141 [1.8m]: https://github.com/rust-lang/rust/pull/31020
2142 [1.8mf]: https://github.com/rust-lang/rust/pull/31534
2143 [1.8mp]: https://github.com/rust-lang/rust/pull/30894
2144 [1.8mr]: https://users.rust-lang.org/t/multirust-0-8-with-cross-std-installation/4901
2145 [1.8ms]: https://github.com/rust-lang/rust/pull/30448
2146 [1.8n]: https://github.com/rust-lang/rust/pull/31056
2147 [1.8nx]: https://github.com/rust-lang/rust/pull/30859
2148 [1.8r]: https://github.com/rust-lang/rust/pull/31551
2149 [1.8so]: https://github.com/rust-lang/rust/pull/31333
2150 [1.8st]: https://github.com/rust-lang/rust/pull/29520
2151 [1.8t]: https://github.com/rust-lang/rust/pull/31358
2152 [1.8tn]: https://github.com/rust-lang/rust/pull/30882
2153 [1.8u]: https://github.com/rust-lang/rust/pull/31793
2154 [1.8v]: https://github.com/rust-lang/rust/pull/31757
2155 [1.8w]: https://github.com/rust-lang/rust/pull/31904
2156 [RFC 1361]: https://github.com/rust-lang/rfcs/blob/master/text/1361-cargo-cfg-dependencies.md
2157 [RFC 1415]: https://github.com/rust-lang/rfcs/blob/master/text/1415-trim-std-os.md
2158 [RFC 218]: https://github.com/rust-lang/rfcs/blob/master/text/0218-empty-struct-with-braces.md
2159 [RFC 953]: https://github.com/rust-lang/rfcs/blob/master/text/0953-op-assign.md
2160 [`AddAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.AddAssign.html
2161 [`BitAndAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitAndAssign.html
2162 [`BitOrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitOrAssign.html
2163 [`BitXorAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitXorAssign.html
2164 [`DivAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.DivAssign.html
2165 [`Instant::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.duration_since
2166 [`Instant::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.elapsed
2167 [`Instant::now`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.now
2168 [`MulAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.MulAssign.html
2169 [`Ref::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.Ref.html#method.map
2170 [`RefMut::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.RefMut.html#method.map
2171 [`RemAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.RemAssign.html
2172 [`ShlAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShlAssign.html
2173 [`ShrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShrAssign.html
2174 [`SubAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.SubAssign.html
2175 [`SystemTime::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.duration_since
2176 [`SystemTime::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.elapsed
2177 [`SystemTime::now`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.now
2178 [`SystemTimeError::duration`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html#method.duration
2179 [`SystemTimeError`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html
2180 [`UNIX_EPOCH`]: http://doc.rust-lang.org/nightly/std/time/constant.UNIX_EPOCH.html
2181 [`ptr::drop_in_place`]: http://doc.rust-lang.org/nightly/std/ptr/fn.drop_in_place.html
2182 [`str::EncodeUtf16`]: http://doc.rust-lang.org/nightly/std/str/struct.EncodeUtf16.html
2183 [`str::encode_utf16`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.encode_utf16
2184 [`time::Instant`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html
2185 [`time::SystemTime`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html
2188 Version 1.7.0 (2016-03-03)
2189 ==========================
2196 * [`Path::strip_prefix`][] (renamed from relative_from)
2197 * [`path::StripPrefixError`][] (new error type returned from strip_prefix)
2199 * [`Ipv4Addr::is_loopback`]
2200 * [`Ipv4Addr::is_private`]
2201 * [`Ipv4Addr::is_link_local`]
2202 * [`Ipv4Addr::is_multicast`]
2203 * [`Ipv4Addr::is_broadcast`]
2204 * [`Ipv4Addr::is_documentation`]
2206 * [`Ipv6Addr::is_unspecified`]
2207 * [`Ipv6Addr::is_loopback`]
2208 * [`Ipv6Addr::is_multicast`]
2211 * [`Vec::as_mut_slice`]
2213 * [`String::as_str`]
2214 * [`String::as_mut_str`]
2216 * `<[T]>::`[`clone_from_slice`], which now requires the two slices to
2218 * `<[T]>::`[`sort_by_key`]
2219 * checked, saturated, and overflowing operations
2220 * [`i32::checked_rem`], [`i32::checked_neg`], [`i32::checked_shl`], [`i32::checked_shr`]
2221 * [`i32::saturating_mul`]
2222 * [`i32::overflowing_add`], [`i32::overflowing_sub`], [`i32::overflowing_mul`], [`i32::overflowing_div`]
2223 * [`i32::overflowing_rem`], [`i32::overflowing_neg`], [`i32::overflowing_shl`], [`i32::overflowing_shr`]
2224 * [`u32::checked_rem`], [`u32::checked_neg`], [`u32::checked_shl`], [`u32::checked_shl`]
2225 * [`u32::saturating_mul`]
2226 * [`u32::overflowing_add`], [`u32::overflowing_sub`], [`u32::overflowing_mul`], [`u32::overflowing_div`]
2227 * [`u32::overflowing_rem`], [`u32::overflowing_neg`], [`u32::overflowing_shl`], [`u32::overflowing_shr`]
2228 * and checked, saturated, and overflowing operations for other primitive types
2230 * [`ffi::IntoStringError`]
2231 * [`CString::into_string`]
2232 * [`CString::into_bytes`]
2233 * [`CString::into_bytes_with_nul`]
2234 * `From<CString> for Vec<u8>`
2236 * [`IntoStringError::into_cstring`]
2237 * [`IntoStringError::utf8_error`]
2238 * `Error for IntoStringError`
2240 * [`std::hash::BuildHasher`]
2241 * [`BuildHasher::Hasher`]
2242 * [`BuildHasher::build_hasher`]
2243 * [`std::hash::BuildHasherDefault`]
2244 * [`HashMap::with_hasher`]
2245 * [`HashMap::with_capacity_and_hasher`]
2246 * [`HashSet::with_hasher`]
2247 * [`HashSet::with_capacity_and_hasher`]
2248 * [`std::collections::hash_map::RandomState`]
2249 * [`RandomState::new`]
2250 * [Validating UTF-8 is faster by a factor of between 7 and 14x for
2251 ASCII input][1.7utf8]. This means that creating `String`s and `str`s
2252 from bytes is faster.
2253 * [The performance of `LineWriter` (and thus `io::stdout`) was
2254 improved by using `memchr` to search for newlines][1.7m].
2255 * [`f32::to_degrees` and `f32::to_radians` are stable][1.7f]. The
2256 `f64` variants were stabilized previously.
2257 * [`BTreeMap` was rewritten to use less memory and improve the performance
2258 of insertion and iteration, the latter by as much as 5x][1.7bm].
2259 * [`BTreeSet` and its iterators, `Iter`, `IntoIter`, and `Range` are
2260 covariant over their contained type][1.7bt].
2261 * [`LinkedList` and its iterators, `Iter` and `IntoIter` are covariant
2262 over their contained type][1.7ll].
2263 * [`str::replace` now accepts a `Pattern`][1.7rp], like other string
2265 * [`Any` is implemented for unsized types][1.7a].
2266 * [`Hash` is implemented for `Duration`][1.7h].
2271 * [When running tests with `--test`, rustdoc will pass `--cfg`
2272 arguments to the compiler][1.7dt].
2273 * [The compiler is built with RPATH information by default][1.7rpa].
2274 This means that it will be possible to run `rustc` when installed in
2275 unusual configurations without configuring the dynamic linker search
2277 * [`rustc` passes `--enable-new-dtags` to GNU ld][1.7dta]. This makes
2278 any RPATH entries (emitted with `-C rpath`) *not* take precedence
2279 over `LD_LIBRARY_PATH`.
2284 * [`cargo rustc` accepts a `--profile` flag that runs `rustc` under
2285 any of the compilation profiles, 'dev', 'bench', or 'test'][1.7cp].
2286 * [The `rerun-if-changed` build script directive no longer causes the
2287 build script to incorrectly run twice in certain scenarios][1.7rr].
2292 * Soundness fixes to the interactions between associated types and
2293 lifetimes, specified in [RFC 1214], [now generate errors][1.7sf] for
2294 code that violates the new rules. This is a significant change that
2295 is known to break existing code, so it has emitted warnings for the
2296 new error cases since 1.4 to give crate authors time to adapt. The
2297 details of what is changing are subtle; read the RFC for more.
2298 * [Several bugs in the compiler's visibility calculations were
2299 fixed][1.7v]. Since this was found to break significant amounts of
2300 code, the new errors will be emitted as warnings for several release
2301 cycles, under the `private_in_public` lint.
2302 * Defaulted type parameters were accidentally accepted in positions
2303 that were not intended. In this release, [defaulted type parameters
2304 appearing outside of type definitions will generate a
2305 warning][1.7d], which will become an error in future releases.
2306 * [Parsing "." as a float results in an error instead of 0][1.7p].
2307 That is, `".".parse::<f32>()` returns `Err`, not `Ok(0.0)`.
2308 * [Borrows of closure parameters may not outlive the closure][1.7bc].
2310 [1.7a]: https://github.com/rust-lang/rust/pull/30928
2311 [1.7bc]: https://github.com/rust-lang/rust/pull/30341
2312 [1.7bm]: https://github.com/rust-lang/rust/pull/30426
2313 [1.7bt]: https://github.com/rust-lang/rust/pull/30998
2314 [1.7cp]: https://github.com/rust-lang/cargo/pull/2224
2315 [1.7d]: https://github.com/rust-lang/rust/pull/30724
2316 [1.7dt]: https://github.com/rust-lang/rust/pull/30372
2317 [1.7dta]: https://github.com/rust-lang/rust/pull/30394
2318 [1.7f]: https://github.com/rust-lang/rust/pull/30672
2319 [1.7h]: https://github.com/rust-lang/rust/pull/30818
2320 [1.7ll]: https://github.com/rust-lang/rust/pull/30663
2321 [1.7m]: https://github.com/rust-lang/rust/pull/30381
2322 [1.7p]: https://github.com/rust-lang/rust/pull/30681
2323 [1.7rp]: https://github.com/rust-lang/rust/pull/29498
2324 [1.7rpa]: https://github.com/rust-lang/rust/pull/30353
2325 [1.7rr]: https://github.com/rust-lang/cargo/pull/2279
2326 [1.7sf]: https://github.com/rust-lang/rust/pull/30389
2327 [1.7utf8]: https://github.com/rust-lang/rust/pull/30740
2328 [1.7v]: https://github.com/rust-lang/rust/pull/29973
2329 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
2330 [`BuildHasher::Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
2331 [`BuildHasher::build_hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html#tymethod.build_hasher
2332 [`CString::into_bytes_with_nul`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes_with_nul
2333 [`CString::into_bytes`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes
2334 [`CString::into_string`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_string
2335 [`HashMap::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_capacity_and_hasher
2336 [`HashMap::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_hasher
2337 [`HashSet::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_capacity_and_hasher
2338 [`HashSet::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_hasher
2339 [`IntoStringError::into_cstring`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.into_cstring
2340 [`IntoStringError::utf8_error`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.utf8_error
2341 [`Ipv4Addr::is_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_broadcast
2342 [`Ipv4Addr::is_documentation`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_documentation
2343 [`Ipv4Addr::is_link_local`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_link_local
2344 [`Ipv4Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_loopback
2345 [`Ipv4Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_multicast
2346 [`Ipv4Addr::is_private`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_private
2347 [`Ipv6Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_loopback
2348 [`Ipv6Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_multicast
2349 [`Ipv6Addr::is_unspecified`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_unspecified
2350 [`Path::strip_prefix`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.strip_prefix
2351 [`RandomState::new`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html#method.new
2352 [`String::as_mut_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_mut_str
2353 [`String::as_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_str
2354 [`Vec::as_mut_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_mut_slice
2355 [`Vec::as_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_slice
2356 [`clone_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.clone_from_slice
2357 [`ffi::IntoStringError`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html
2358 [`i32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_neg
2359 [`i32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_rem
2360 [`i32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shl
2361 [`i32::checked_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shr
2362 [`i32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_add
2363 [`i32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_div
2364 [`i32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_mul
2365 [`i32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_neg
2366 [`i32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_rem
2367 [`i32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shl
2368 [`i32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shr
2369 [`i32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_sub
2370 [`i32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.saturating_mul
2371 [`path::StripPrefixError`]: http://doc.rust-lang.org/nightly/std/path/struct.StripPrefixError.html
2372 [`sort_by_key`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.sort_by_key
2373 [`std::collections::hash_map::RandomState`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html
2374 [`std::hash::BuildHasherDefault`]: http://doc.rust-lang.org/nightly/std/hash/struct.BuildHasherDefault.html
2375 [`std::hash::BuildHasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html
2376 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
2377 [`u32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_rem
2378 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
2379 [`u32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_shl
2380 [`u32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_add
2381 [`u32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_div
2382 [`u32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_mul
2383 [`u32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_neg
2384 [`u32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_rem
2385 [`u32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shl
2386 [`u32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shr
2387 [`u32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_sub
2388 [`u32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.saturating_mul
2391 Version 1.6.0 (2016-01-21)
2392 ==========================
2397 * The `#![no_std]` attribute causes a crate to not be linked to the
2398 standard library, but only the [core library][1.6co], as described
2399 in [RFC 1184]. The core library defines common types and traits but
2400 has no platform dependencies whatsoever, and is the basis for Rust
2401 software in environments that cannot support a full port of the
2402 standard library, such as operating systems. Most of the core
2403 library is now stable.
2409 [`Read::read_exact`],
2410 [`ErrorKind::UnexpectedEof`][] (renamed from `UnexpectedEOF`),
2411 [`fs::DirBuilder`], [`fs::DirBuilder::new`],
2412 [`fs::DirBuilder::recursive`], [`fs::DirBuilder::create`],
2413 [`os::unix::fs::DirBuilderExt`],
2414 [`os::unix::fs::DirBuilderExt::mode`], [`vec::Drain`],
2415 [`vec::Vec::drain`], [`string::Drain`], [`string::String::drain`],
2416 [`vec_deque::Drain`], [`vec_deque::VecDeque::drain`],
2417 [`collections::hash_map::Drain`],
2418 [`collections::hash_map::HashMap::drain`],
2419 [`collections::hash_set::Drain`],
2420 [`collections::hash_set::HashSet::drain`],
2421 [`collections::binary_heap::Drain`],
2422 [`collections::binary_heap::BinaryHeap::drain`],
2423 [`Vec::extend_from_slice`][] (renamed from `push_all`),
2424 [`Mutex::get_mut`], [`Mutex::into_inner`], [`RwLock::get_mut`],
2425 [`RwLock::into_inner`],
2426 [`Iterator::min_by_key`][] (renamed from `min_by`),
2427 [`Iterator::max_by_key`][] (renamed from `max_by`).
2428 * The [core library][1.6co] is stable, as are most of its APIs.
2429 * [The `assert_eq!` macro supports arguments that don't implement
2430 `Sized`][1.6ae], such as arrays. In this way it behaves more like
2432 * Several timer functions that take duration in milliseconds [are
2433 deprecated in favor of those that take `Duration`][1.6ms]. These
2434 include `Condvar::wait_timeout_ms`, `thread::sleep_ms`, and
2435 `thread::park_timeout_ms`.
2436 * The algorithm by which `Vec` reserves additional elements was
2437 [tweaked to not allocate excessive space][1.6a] while still growing
2439 * `From` conversions are [implemented from integers to floats][1.6f]
2440 in cases where the conversion is lossless. Thus they are not
2441 implemented for 32-bit ints to `f32`, nor for 64-bit ints to `f32`
2442 or `f64`. They are also not implemented for `isize` and `usize`
2443 because the implementations would be platform-specific. `From` is
2444 also implemented from `f32` to `f64`.
2445 * `From<&Path>` and `From<PathBuf>` are implemented for `Cow<Path>`.
2446 * `From<T>` is implemented for `Box<T>`, `Rc<T>` and `Arc<T>`.
2447 * `IntoIterator` is implemented for `&PathBuf` and `&Path`.
2448 * [`BinaryHeap` was refactored][1.6bh] for modest performance
2450 * Sorting slices that are already sorted [is 50% faster in some
2456 * Cargo will look in `$CARGO_HOME/bin` for subcommands [by default][1.6c].
2457 * Cargo build scripts can specify their dependencies by emitting the
2458 [`rerun-if-changed`][1.6rr] key.
2459 * crates.io will reject publication of crates with dependencies that
2460 have a wildcard version constraint. Crates with wildcard
2461 dependencies were seen to cause a variety of problems, as described
2462 in [RFC 1241]. Since 1.5 publication of such crates has emitted a
2464 * `cargo clean` [accepts a `--release` flag][1.6cc] to clean the
2465 release folder. A variety of artifacts that Cargo failed to clean
2466 are now correctly deleted.
2471 * The `unreachable_code` lint [warns when a function call's argument
2473 * The parser indicates [failures that may be caused by
2474 confusingly-similar Unicode characters][1.6uc]
2475 * Certain macro errors [are reported at definition time][1.6m], not
2481 * The compiler no longer makes use of the [`RUST_PATH`][1.6rp]
2482 environment variable when locating crates. This was a pre-cargo
2483 feature for integrating with the package manager that was
2484 accidentally never removed.
2485 * [A number of bugs were fixed in the privacy checker][1.6p] that
2486 could cause previously-accepted code to break.
2487 * [Modules and unit/tuple structs may not share the same name][1.6ts].
2488 * [Bugs in pattern matching unit structs were fixed][1.6us]. The tuple
2489 struct pattern syntax (`Foo(..)`) can no longer be used to match
2490 unit structs. This is a warning now, but will become an error in
2491 future releases. Patterns that share the same name as a const are
2493 * A bug was fixed that causes [rustc not to apply default type
2494 parameters][1.6xc] when resolving certain method implementations of
2495 traits defined in other crates.
2497 [1.6a]: https://github.com/rust-lang/rust/pull/29454
2498 [1.6ae]: https://github.com/rust-lang/rust/pull/29770
2499 [1.6bh]: https://github.com/rust-lang/rust/pull/29811
2500 [1.6c]: https://github.com/rust-lang/cargo/pull/2192
2501 [1.6cc]: https://github.com/rust-lang/cargo/pull/2131
2502 [1.6co]: http://doc.rust-lang.org/beta/core/index.html
2503 [1.6dv]: https://github.com/rust-lang/rust/pull/30000
2504 [1.6f]: https://github.com/rust-lang/rust/pull/29129
2505 [1.6m]: https://github.com/rust-lang/rust/pull/29828
2506 [1.6ms]: https://github.com/rust-lang/rust/pull/29604
2507 [1.6p]: https://github.com/rust-lang/rust/pull/29726
2508 [1.6rp]: https://github.com/rust-lang/rust/pull/30034
2509 [1.6rr]: https://github.com/rust-lang/cargo/pull/2134
2510 [1.6s]: https://github.com/rust-lang/rust/pull/29675
2511 [1.6ts]: https://github.com/rust-lang/rust/issues/21546
2512 [1.6uc]: https://github.com/rust-lang/rust/pull/29837
2513 [1.6us]: https://github.com/rust-lang/rust/pull/29383
2514 [1.6xc]: https://github.com/rust-lang/rust/issues/30123
2515 [RFC 1184]: https://github.com/rust-lang/rfcs/blob/master/text/1184-stabilize-no_std.md
2516 [RFC 1241]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
2517 [`ErrorKind::UnexpectedEof`]: http://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html#variant.UnexpectedEof
2518 [`Iterator::max_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.max_by_key
2519 [`Iterator::min_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.min_by_key
2520 [`Mutex::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.get_mut
2521 [`Mutex::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.into_inner
2522 [`Read::read_exact`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_exact
2523 [`RwLock::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.get_mut
2524 [`RwLock::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.into_inner
2525 [`Vec::extend_from_slice`]: http://doc.rust-lang.org/nightly/collections/vec/struct.Vec.html#method.extend_from_slice
2526 [`collections::binary_heap::BinaryHeap::drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.BinaryHeap.html#method.drain
2527 [`collections::binary_heap::Drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.Drain.html
2528 [`collections::hash_map::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.Drain.html
2529 [`collections::hash_map::HashMap::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.HashMap.html#method.drain
2530 [`collections::hash_set::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.Drain.html
2531 [`collections::hash_set::HashSet::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.HashSet.html#method.drain
2532 [`fs::DirBuilder::create`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.create
2533 [`fs::DirBuilder::new`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.new
2534 [`fs::DirBuilder::recursive`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.recursive
2535 [`fs::DirBuilder`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html
2536 [`os::unix::fs::DirBuilderExt::mode`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html#tymethod.mode
2537 [`os::unix::fs::DirBuilderExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html
2538 [`string::Drain`]: http://doc.rust-lang.org/nightly/std/string/struct.Drain.html
2539 [`string::String::drain`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.drain
2540 [`vec::Drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Drain.html
2541 [`vec::Vec::drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.drain
2542 [`vec_deque::Drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.Drain.html
2543 [`vec_deque::VecDeque::drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.VecDeque.html#method.drain
2546 Version 1.5.0 (2015-12-10)
2547 ==========================
2549 * ~700 changes, numerous bugfixes
2555 [`BinaryHeap::from`], [`BinaryHeap::into_sorted_vec`],
2556 [`BinaryHeap::into_vec`], [`Condvar::wait_timeout`],
2557 [`FileTypeExt::is_block_device`], [`FileTypeExt::is_char_device`],
2558 [`FileTypeExt::is_fifo`], [`FileTypeExt::is_socket`],
2559 [`FileTypeExt`], [`Formatter::alternate`], [`Formatter::fill`],
2560 [`Formatter::precision`], [`Formatter::sign_aware_zero_pad`],
2561 [`Formatter::sign_minus`], [`Formatter::sign_plus`],
2562 [`Formatter::width`], [`Iterator::cmp`], [`Iterator::eq`],
2563 [`Iterator::ge`], [`Iterator::gt`], [`Iterator::le`],
2564 [`Iterator::lt`], [`Iterator::ne`], [`Iterator::partial_cmp`],
2565 [`Path::canonicalize`], [`Path::exists`], [`Path::is_dir`],
2566 [`Path::is_file`], [`Path::metadata`], [`Path::read_dir`],
2567 [`Path::read_link`], [`Path::symlink_metadata`],
2568 [`Utf8Error::valid_up_to`], [`Vec::resize`],
2569 [`VecDeque::as_mut_slices`], [`VecDeque::as_slices`],
2570 [`VecDeque::insert`], [`VecDeque::shrink_to_fit`],
2571 [`VecDeque::swap_remove_back`], [`VecDeque::swap_remove_front`],
2572 [`slice::split_first_mut`], [`slice::split_first`],
2573 [`slice::split_last_mut`], [`slice::split_last`],
2574 [`char::from_u32_unchecked`], [`fs::canonicalize`],
2575 [`str::MatchIndices`], [`str::RMatchIndices`],
2576 [`str::match_indices`], [`str::rmatch_indices`],
2577 [`str::slice_mut_unchecked`], [`string::ParseError`].
2578 * Rust applications hosted on crates.io can be installed locally to
2579 `~/.cargo/bin` with the [`cargo install`] command. Among other
2580 things this makes it easier to augment Cargo with new subcommands:
2581 when a binary named e.g. `cargo-foo` is found in `$PATH` it can be
2582 invoked as `cargo foo`.
2583 * Crates with wildcard (`*`) dependencies will [emit warnings when
2584 published][1.5w]. In 1.6 it will no longer be possible to publish
2585 crates with wildcard dependencies.
2590 * The rules determining when a particular lifetime must outlive
2591 a particular value (known as '[dropck]') have been [modified
2592 to not rely on parametricity][1.5p].
2593 * [Implementations of `AsRef` and `AsMut` were added to `Box`, `Rc`,
2594 and `Arc`][1.5a]. Because these smart pointer types implement
2595 `Deref`, this causes breakage in cases where the interior type
2596 contains methods of the same name.
2597 * [Correct a bug in Rc/Arc][1.5c] that caused [dropck] to be unaware
2598 that they could drop their content. Soundness fix.
2599 * All method invocations are [properly checked][1.5wf1] for
2600 [well-formedness][1.5wf2]. Soundness fix.
2601 * Traits whose supertraits contain `Self` are [not object
2602 safe][1.5o]. Soundness fix.
2603 * Target specifications support a [`no_default_libraries`][1.5nd]
2604 setting that controls whether `-nodefaultlibs` is passed to the
2605 linker, and in turn the `is_like_windows` setting no longer affects
2606 the `-nodefaultlibs` flag.
2607 * `#[derive(Show)]`, long-deprecated, [has been removed][1.5ds].
2608 * The `#[inline]` and `#[repr]` attributes [can only appear
2609 in valid locations][1.5at].
2610 * Native libraries linked from the local crate are [passed to
2611 the linker before native libraries from upstream crates][1.5nl].
2612 * Two rarely-used attributes, `#[no_debug]` and
2613 `#[omit_gdb_pretty_printer_section]` [are feature gated][1.5fg].
2614 * Negation of unsigned integers, which has been a warning for
2615 several releases, [is now behind a feature gate and will
2616 generate errors][1.5nu].
2617 * The parser accidentally accepted visibility modifiers on
2618 enum variants, a bug [which has been fixed][1.5ev].
2619 * [A bug was fixed that allowed `use` statements to import unstable
2625 * When evaluating expressions at compile-time that are not
2626 compile-time constants (const-evaluating expressions in non-const
2627 contexts), incorrect code such as overlong bitshifts and arithmetic
2628 overflow will [generate a warning instead of an error][1.5ce],
2629 delaying the error until runtime. This will allow the
2630 const-evaluator to be expanded in the future backwards-compatibly.
2631 * The `improper_ctypes` lint [no longer warns about using `isize` and
2632 `usize` in FFI][1.5ict].
2637 * `Arc<T>` and `Rc<T>` are [covariant with respect to `T` instead of
2639 * `Default` is [implemented for mutable slices][1.5d].
2640 * `FromStr` is [implemented for `SockAddrV4` and `SockAddrV6`][1.5s].
2641 * There are now `From` conversions [between floating point
2642 types][1.5f] where the conversions are lossless.
2643 * Thera are now `From` conversions [between integer types][1.5i] where
2644 the conversions are lossless.
2645 * [`fs::Metadata` implements `Clone`][1.5fs].
2646 * The `parse` method [accepts a leading "+" when parsing
2648 * [`AsMut` is implemented for `Vec`][1.5am].
2649 * The `clone_from` implementations for `String` and `BinaryHeap` [have
2650 been optimized][1.5cf] and no longer rely on the default impl.
2651 * The `extern "Rust"`, `extern "C"`, `unsafe extern "Rust"` and
2652 `unsafe extern "C"` function types now [implement `Clone`,
2653 `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and
2654 `fmt::Debug` for up to 12 arguments][1.5fp].
2655 * [Dropping `Vec`s is much faster in unoptimized builds when the
2656 element types don't implement `Drop`][1.5dv].
2657 * A bug that caused in incorrect behavior when [combining `VecDeque`
2658 with zero-sized types][1.5vdz] was resolved.
2659 * [`PartialOrd` for slices is faster][1.5po].
2664 * [Crate metadata size was reduced by 20%][1.5md].
2665 * [Improvements to code generation reduced the size of libcore by 3.3
2666 MB and rustc's memory usage by 18MB][1.5m].
2667 * [Improvements to deref translation increased performance in
2668 unoptimized builds][1.5dr].
2669 * Various errors in trait resolution [are deduplicated to only be
2670 reported once][1.5te].
2671 * Rust has preliminary [support for rumprun kernels][1.5rr].
2672 * Rust has preliminary [support for NetBSD on amd64][1.5na].
2674 [1.5use]: https://github.com/rust-lang/rust/pull/28364
2675 [1.5po]: https://github.com/rust-lang/rust/pull/28436
2676 [1.5ev]: https://github.com/rust-lang/rust/pull/28442
2677 [1.5nu]: https://github.com/rust-lang/rust/pull/28468
2678 [1.5dr]: https://github.com/rust-lang/rust/pull/28491
2679 [1.5vdz]: https://github.com/rust-lang/rust/pull/28494
2680 [1.5md]: https://github.com/rust-lang/rust/pull/28521
2681 [1.5fg]: https://github.com/rust-lang/rust/pull/28522
2682 [1.5dv]: https://github.com/rust-lang/rust/pull/28531
2683 [1.5na]: https://github.com/rust-lang/rust/pull/28543
2684 [1.5fp]: https://github.com/rust-lang/rust/pull/28560
2685 [1.5rr]: https://github.com/rust-lang/rust/pull/28593
2686 [1.5cf]: https://github.com/rust-lang/rust/pull/28602
2687 [1.5nl]: https://github.com/rust-lang/rust/pull/28605
2688 [1.5te]: https://github.com/rust-lang/rust/pull/28645
2689 [1.5at]: https://github.com/rust-lang/rust/pull/28650
2690 [1.5am]: https://github.com/rust-lang/rust/pull/28663
2691 [1.5m]: https://github.com/rust-lang/rust/pull/28778
2692 [1.5ict]: https://github.com/rust-lang/rust/pull/28779
2693 [1.5a]: https://github.com/rust-lang/rust/pull/28811
2694 [1.5pi]: https://github.com/rust-lang/rust/pull/28826
2695 [1.5ce]: https://github.com/rust-lang/rfcs/blob/master/text/1229-compile-time-asserts.md
2696 [1.5p]: https://github.com/rust-lang/rfcs/blob/master/text/1238-nonparametric-dropck.md
2697 [1.5i]: https://github.com/rust-lang/rust/pull/28921
2698 [1.5fs]: https://github.com/rust-lang/rust/pull/29021
2699 [1.5f]: https://github.com/rust-lang/rust/pull/29129
2700 [1.5ds]: https://github.com/rust-lang/rust/pull/29148
2701 [1.5s]: https://github.com/rust-lang/rust/pull/29190
2702 [1.5d]: https://github.com/rust-lang/rust/pull/29245
2703 [1.5o]: https://github.com/rust-lang/rust/pull/29259
2704 [1.5nd]: https://github.com/rust-lang/rust/pull/28578
2705 [1.5wf2]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
2706 [1.5wf1]: https://github.com/rust-lang/rust/pull/28669
2707 [dropck]: https://doc.rust-lang.org/nightly/nomicon/dropck.html
2708 [1.5c]: https://github.com/rust-lang/rust/pull/29110
2709 [1.5w]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
2710 [`cargo install`]: https://github.com/rust-lang/rfcs/blob/master/text/1200-cargo-install.md
2711 [`BinaryHeap::from`]: http://doc.rust-lang.org/nightly/std/convert/trait.From.html#method.from
2712 [`BinaryHeap::into_sorted_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_sorted_vec
2713 [`BinaryHeap::into_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_vec
2714 [`Condvar::wait_timeout`]: http://doc.rust-lang.org/nightly/std/sync/struct.Condvar.html#method.wait_timeout
2715 [`FileTypeExt::is_block_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_block_device
2716 [`FileTypeExt::is_char_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_char_device
2717 [`FileTypeExt::is_fifo`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_fifo
2718 [`FileTypeExt::is_socket`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_socket
2719 [`FileTypeExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html
2720 [`Formatter::alternate`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.alternate
2721 [`Formatter::fill`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.fill
2722 [`Formatter::precision`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.precision
2723 [`Formatter::sign_aware_zero_pad`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_aware_zero_pad
2724 [`Formatter::sign_minus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_minus
2725 [`Formatter::sign_plus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_plus
2726 [`Formatter::width`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.width
2727 [`Iterator::cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.cmp
2728 [`Iterator::eq`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.eq
2729 [`Iterator::ge`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ge
2730 [`Iterator::gt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.gt
2731 [`Iterator::le`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.le
2732 [`Iterator::lt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.lt
2733 [`Iterator::ne`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ne
2734 [`Iterator::partial_cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.partial_cmp
2735 [`Path::canonicalize`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.canonicalize
2736 [`Path::exists`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.exists
2737 [`Path::is_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_dir
2738 [`Path::is_file`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_file
2739 [`Path::metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.metadata
2740 [`Path::read_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_dir
2741 [`Path::read_link`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_link
2742 [`Path::symlink_metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.symlink_metadata
2743 [`Utf8Error::valid_up_to`]: http://doc.rust-lang.org/nightly/core/str/struct.Utf8Error.html#method.valid_up_to
2744 [`Vec::resize`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.resize
2745 [`VecDeque::as_mut_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_mut_slices
2746 [`VecDeque::as_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_slices
2747 [`VecDeque::insert`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.insert
2748 [`VecDeque::shrink_to_fit`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.shrink_to_fit
2749 [`VecDeque::swap_remove_back`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_back
2750 [`VecDeque::swap_remove_front`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_front
2751 [`slice::split_first_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first_mut
2752 [`slice::split_first`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first
2753 [`slice::split_last_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last_mut
2754 [`slice::split_last`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last
2755 [`char::from_u32_unchecked`]: http://doc.rust-lang.org/nightly/std/char/fn.from_u32_unchecked.html
2756 [`fs::canonicalize`]: http://doc.rust-lang.org/nightly/std/fs/fn.canonicalize.html
2757 [`str::MatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.MatchIndices.html
2758 [`str::RMatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.RMatchIndices.html
2759 [`str::match_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.match_indices
2760 [`str::rmatch_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatch_indices
2761 [`str::slice_mut_unchecked`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.slice_mut_unchecked
2762 [`string::ParseError`]: http://doc.rust-lang.org/nightly/std/string/enum.ParseError.html
2764 Version 1.4.0 (2015-10-29)
2765 ==========================
2767 * ~1200 changes, numerous bugfixes
2772 * Windows builds targeting the 64-bit MSVC ABI and linker (instead of
2773 GNU) are now supported and recommended for use.
2778 * [Several changes have been made to fix type soundness and improve
2779 the behavior of associated types][sound]. See [RFC 1214]. Although
2780 we have mostly introduced these changes as warnings this release, to
2781 become errors next release, there are still some scenarios that will
2782 see immediate breakage.
2783 * [The `str::lines` and `BufRead::lines` iterators treat `\r\n` as
2784 line breaks in addition to `\n`][crlf].
2785 * [Loans of `'static` lifetime extend to the end of a function][stat].
2786 * [`str::parse` no longer introduces avoidable rounding error when
2787 parsing floating point numbers. Together with earlier changes to
2788 float formatting/output, "round trips" like f.to_string().parse()
2789 now preserve the value of f exactly. Additionally, leading plus
2790 signs are now accepted][fp3].
2796 * `use` statements that import multiple items [can now rename
2797 them][i], as in `use foo::{bar as kitten, baz as puppy}`.
2798 * [Binops work correctly on fat pointers][binfat].
2799 * `pub extern crate`, which does not behave as expected, [issues a
2800 warning][pec] until a better solution is found.
2805 * [Many APIs were stabilized][stab]: `<Box<str>>::into_string`,
2806 [`Arc::downgrade`], [`Arc::get_mut`], [`Arc::make_mut`],
2807 [`Arc::try_unwrap`], [`Box::from_raw`], [`Box::into_raw`], [`CStr::to_str`],
2808 [`CStr::to_string_lossy`], [`CString::from_raw`], [`CString::into_raw`],
2809 [`IntoRawFd::into_raw_fd`], [`IntoRawFd`],
2810 `IntoRawHandle::into_raw_handle`, `IntoRawHandle`,
2811 `IntoRawSocket::into_raw_socket`, `IntoRawSocket`, [`Rc::downgrade`],
2812 [`Rc::get_mut`], [`Rc::make_mut`], [`Rc::try_unwrap`], [`Result::expect`],
2813 [`String::into_boxed_str`], [`TcpStream::read_timeout`],
2814 [`TcpStream::set_read_timeout`], [`TcpStream::set_write_timeout`],
2815 [`TcpStream::write_timeout`], [`UdpSocket::read_timeout`],
2816 [`UdpSocket::set_read_timeout`], [`UdpSocket::set_write_timeout`],
2817 [`UdpSocket::write_timeout`], `Vec::append`, `Vec::split_off`,
2818 [`VecDeque::append`], [`VecDeque::retain`], [`VecDeque::split_off`],
2819 [`rc::Weak::upgrade`], [`rc::Weak`], [`slice::Iter::as_slice`],
2820 [`slice::IterMut::into_slice`], [`str::CharIndices::as_str`],
2821 [`str::Chars::as_str`], [`str::split_at_mut`], [`str::split_at`],
2822 [`sync::Weak::upgrade`], [`sync::Weak`], [`thread::park_timeout`],
2824 * [Some APIs were deprecated][dep]: `BTreeMap::with_b`,
2825 `BTreeSet::with_b`, `Option::as_mut_slice`, `Option::as_slice`,
2826 `Result::as_mut_slice`, `Result::as_slice`, `f32::from_str_radix`,
2827 `f64::from_str_radix`.
2828 * [Reverse-searching strings is faster with the 'two-way'
2830 * [`std::io::copy` allows `?Sized` arguments][cc].
2831 * The `Windows`, `Chunks`, and `ChunksMut` iterators over slices all
2832 [override `count`, `nth` and `last` with an O(1)
2833 implementation][it].
2834 * [`Default` is implemented for arrays up to `[T; 32]`][d].
2835 * [`IntoRawFd` has been added to the Unix-specific prelude,
2836 `IntoRawSocket` and `IntoRawHandle` to the Windows-specific
2838 * [`Extend<String>` and `FromIterator<String` are both implemented for
2840 * [`IntoIterator` is implemented for references to `Option` and
2842 * [`HashMap` and `HashSet` implement `Extend<&T>` where `T:
2843 Copy`][ext] as part of [RFC 839]. This will cause type inferance
2844 breakage in rare situations.
2845 * [`BinaryHeap` implements `Debug`][bh2].
2846 * [`Borrow` and `BorrowMut` are implemented for fixed-size
2848 * [`extern fn`s with the "Rust" and "C" ABIs implement common
2849 traits including `Eq`, `Ord`, `Debug`, `Hash`][fp].
2850 * [String comparison is faster][faststr].
2851 * `&mut T` where `T: std::fmt::Write` [also implements
2852 `std::fmt::Write`][mutw].
2853 * [A stable regression in `VecDeque::push_back` and other
2854 capicity-altering methods that caused panics for zero-sized types
2856 * [Function pointers implement traits for up to 12 parameters][fp2].
2861 * The compiler [no longer uses the 'morestack' feature to prevent
2862 stack overflow][mm]. Instead it uses guard pages and stack
2863 probes (though stack probes are not yet implemented on any platform
2865 * [The compiler matches traits faster when projections are involved][p].
2866 * The 'improper_ctypes' lint [no longer warns about use of `isize` and
2868 * [Cargo now displays useful information about what its doing during
2869 `cargo update`][cu].
2871 [`Arc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.downgrade
2872 [`Arc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.make_mut
2873 [`Arc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.get_mut
2874 [`Arc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.try_unwrap
2875 [`Box::from_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.from_raw
2876 [`Box::into_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.into_raw
2877 [`CStr::to_str`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_str
2878 [`CStr::to_string_lossy`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_string_lossy
2879 [`CString::from_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.from_raw
2880 [`CString::into_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_raw
2881 [`IntoRawFd::into_raw_fd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html#tymethod.into_raw_fd
2882 [`IntoRawFd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html
2883 [`Rc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.downgrade
2884 [`Rc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.get_mut
2885 [`Rc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.make_mut
2886 [`Rc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.try_unwrap
2887 [`Result::expect`]: http://doc.rust-lang.org/nightly/core/result/enum.Result.html#method.expect
2888 [`String::into_boxed_str`]: http://doc.rust-lang.org/nightly/collections/string/struct.String.html#method.into_boxed_str
2889 [`TcpStream::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
2890 [`TcpStream::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
2891 [`TcpStream::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
2892 [`TcpStream::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
2893 [`UdpSocket::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
2894 [`UdpSocket::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
2895 [`UdpSocket::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
2896 [`UdpSocket::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
2897 [`VecDeque::append`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.append
2898 [`VecDeque::retain`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.retain
2899 [`VecDeque::split_off`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.split_off
2900 [`rc::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html#method.upgrade
2901 [`rc::Weak`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html
2902 [`slice::Iter::as_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.Iter.html#method.as_slice
2903 [`slice::IterMut::into_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.IterMut.html#method.into_slice
2904 [`str::CharIndices::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.CharIndices.html#method.as_str
2905 [`str::Chars::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.Chars.html#method.as_str
2906 [`str::split_at_mut`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at_mut
2907 [`str::split_at`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at
2908 [`sync::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html#method.upgrade
2909 [`sync::Weak`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html
2910 [`thread::park_timeout`]: http://doc.rust-lang.org/nightly/std/thread/fn.park_timeout.html
2911 [`thread::sleep`]: http://doc.rust-lang.org/nightly/std/thread/fn.sleep.html
2912 [bh2]: https://github.com/rust-lang/rust/pull/28156
2913 [binfat]: https://github.com/rust-lang/rust/pull/28270
2914 [bm]: https://github.com/rust-lang/rust/pull/28197
2915 [cc]: https://github.com/rust-lang/rust/pull/27531
2916 [crlf]: https://github.com/rust-lang/rust/pull/28034
2917 [cu]: https://github.com/rust-lang/cargo/pull/1931
2918 [d]: https://github.com/rust-lang/rust/pull/27825
2919 [dep]: https://github.com/rust-lang/rust/pull/28339
2920 [es]: https://github.com/rust-lang/rust/pull/27956
2921 [ext]: https://github.com/rust-lang/rust/pull/28094
2922 [faststr]: https://github.com/rust-lang/rust/pull/28338
2923 [ffi]: https://github.com/rust-lang/rust/pull/28779
2924 [fp]: https://github.com/rust-lang/rust/pull/28268
2925 [fp2]: https://github.com/rust-lang/rust/pull/28560
2926 [fp3]: https://github.com/rust-lang/rust/pull/27307
2927 [i]: https://github.com/rust-lang/rust/pull/27451
2928 [into2]: https://github.com/rust-lang/rust/pull/28039
2929 [it]: https://github.com/rust-lang/rust/pull/27652
2930 [mm]: https://github.com/rust-lang/rust/pull/27338
2931 [mutw]: https://github.com/rust-lang/rust/pull/28368
2932 [sound]: https://github.com/rust-lang/rust/pull/27641
2933 [p]: https://github.com/rust-lang/rust/pull/27866
2934 [pec]: https://github.com/rust-lang/rust/pull/28486
2935 [pr]: https://github.com/rust-lang/rust/pull/27896
2936 [RFC 839]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
2937 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
2938 [s]: https://github.com/rust-lang/rust/pull/27474
2939 [stab]: https://github.com/rust-lang/rust/pull/28339
2940 [stat]: https://github.com/rust-lang/rust/pull/28321
2941 [vd]: https://github.com/rust-lang/rust/pull/28494
2943 Version 1.3.0 (2015-09-17)
2944 ==============================
2946 * ~900 changes, numerous bugfixes
2951 * The [new object lifetime defaults][nold] have been [turned
2952 on][nold2] after a cycle of warnings about the change. Now types
2953 like `&'a Box<Trait>` (or `&'a Rc<Trait>`, etc) will change from
2954 being interpreted as `&'a Box<Trait+'a>` to `&'a
2955 Box<Trait+'static>`.
2956 * [The Rustonomicon][nom] is a new book in the official documentation
2957 that dives into writing unsafe Rust.
2958 * The [`Duration`] API, [has been stabilized][ds]. This basic unit of
2959 timekeeping is employed by other std APIs, as well as out-of-tree
2965 * The [new object lifetime defaults][nold] have been [turned
2966 on][nold2] after a cycle of warnings about the change.
2967 * There is a known [regression][lr] in how object lifetime elision is
2968 interpreted, the proper solution for which is undetermined.
2969 * The `#[prelude_import]` attribute, an internal implementation
2970 detail, was accidentally stabilized previously. [It has been put
2971 behind the `prelude_import` feature gate][pi]. This change is
2972 believed to break no existing code.
2973 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
2974 [more sane for dynamically sized types][dst3]. Code that relied on
2975 the previous behavior is thought to be broken.
2976 * The `dropck` rules, which checks that destructors can't access
2977 destroyed values, [have been updated][dropck] to match the
2978 [RFC][dropckrfc]. This fixes some soundness holes, and as such will
2979 cause some previously-compiling code to no longer build.
2984 * The [new object lifetime defaults][nold] have been [turned
2985 on][nold2] after a cycle of warnings about the change.
2986 * Semicolons may [now follow types and paths in
2987 macros](https://github.com/rust-lang/rust/pull/27000).
2988 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
2989 [more sane for dynamically sized types][dst3]. Code that relied on
2990 the previous behavior is not known to exist, and suspected to be
2992 * `'static` variables [may now be recursive][st].
2993 * `ref` bindings choose between [`Deref`] and [`DerefMut`]
2994 implementations correctly.
2995 * The `dropck` rules, which checks that destructors can't access
2996 destroyed values, [have been updated][dropck] to match the
3002 * The [`Duration`] API, [has been stabilized][ds], as well as the
3003 `std::time` module, which presently contains only `Duration`.
3004 * `Box<str>` and `Box<[T]>` both implement `Clone`.
3005 * The owned C string, [`CString`], implements [`Borrow`] and the
3006 borrowed C string, [`CStr`], implements [`ToOwned`]. The two of
3007 these allow C strings to be borrowed and cloned in generic code.
3008 * [`CStr`] implements [`Debug`].
3009 * [`AtomicPtr`] implements [`Debug`].
3010 * [`Error`] trait objects [can be downcast to their concrete types][e]
3011 in many common configurations, using the [`is`], [`downcast`],
3012 [`downcast_ref`] and [`downcast_mut`] methods, similarly to the
3014 * Searching for substrings now [employs the two-way algorithm][search]
3015 instead of doing a naive search. This gives major speedups to a
3016 number of methods, including [`contains`][sc], [`find`][sf],
3017 [`rfind`][srf], [`split`][ss]. [`starts_with`][ssw] and
3018 [`ends_with`][sew] are also faster.
3019 * The performance of `PartialEq` for slices is [much faster][ps].
3020 * The [`Hash`] trait offers the default method, [`hash_slice`], which
3021 is overridden and optimized by the implementations for scalars.
3022 * The [`Hasher`] trait now has a number of specialized `write_*`
3023 methods for primitive types, for efficiency.
3024 * The I/O-specific error type, [`std::io::Error`][ie], gained a set of
3025 methods for accessing the 'inner error', if any: [`get_ref`][iegr],
3026 [`get_mut`][iegm], [`into_inner`][ieii]. As well, the implementation
3027 of [`std::error::Error::cause`][iec] also delegates to the inner
3029 * [`process::Child`][pc] gained the [`id`] method, which returns a
3030 `u32` representing the platform-specific process identifier.
3031 * The [`connect`] method on slices is deprecated, replaced by the new
3032 [`join`] method (note that both of these are on the *unstable*
3033 [`SliceConcatExt`] trait, but through the magic of the prelude are
3034 available to stable code anyway).
3035 * The [`Div`] operator is implemented for [`Wrapping`] types.
3036 * [`DerefMut` is implemented for `String`][dms].
3037 * Performance of SipHash (the default hasher for `HashMap`) is
3038 [better for long data][sh].
3039 * [`AtomicPtr`] implements [`Send`].
3040 * The [`read_to_end`] implementations for [`Stdin`] and [`File`]
3041 are now [specialized to use uninitalized buffers for increased
3043 * Lifetime parameters of foreign functions [are now resolved
3049 * Rust can now, with some coercion, [produce programs that run on
3050 Windows XP][xp], though XP is not considered a supported platform.
3051 * Porting Rust on Windows from the GNU toolchain to MSVC continues
3052 ([1][win1], [2][win2], [3][win3], [4][win4]). It is still not
3053 recommended for use in 1.3, though should be fully-functional
3054 in the [64-bit 1.4 beta][b14].
3055 * On Fedora-based systems installation will [properly configure the
3056 dynamic linker][fl].
3057 * The compiler gained many new extended error descriptions, which can
3058 be accessed with the `--explain` flag.
3059 * The `dropck` pass, which checks that destructors can't access
3060 destroyed values, [has been rewritten][dropck]. This fixes some
3061 soundness holes, and as such will cause some previously-compiling
3062 code to no longer build.
3063 * `rustc` now uses [LLVM to write archive files where possible][ar].
3064 Eventually this will eliminate the compiler's dependency on the ar
3066 * Rust has [preliminary support for i686 FreeBSD][fb] (it has long
3067 supported FreeBSD on x86_64).
3068 * The [`unused_mut`][lum], [`unconditional_recursion`][lur],
3069 [`improper_ctypes`][lic], and [`negate_unsigned`][lnu] lints are
3071 * If landing pads are disabled (with `-Z no-landing-pads`), [`panic!`
3072 will kill the process instead of leaking][nlp].
3074 [`Any`]: http://doc.rust-lang.org/nightly/std/any/trait.Any.html
3075 [`AtomicPtr`]: http://doc.rust-lang.org/nightly/std/sync/atomic/struct.AtomicPtr.html
3076 [`Borrow`]: http://doc.rust-lang.org/nightly/std/borrow/trait.Borrow.html
3077 [`CStr`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html
3078 [`CString`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html
3079 [`Debug`]: http://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
3080 [`DerefMut`]: http://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
3081 [`Deref`]: http://doc.rust-lang.org/nightly/std/ops/trait.Deref.html
3082 [`Div`]: http://doc.rust-lang.org/nightly/std/ops/trait.Div.html
3083 [`Duration`]: http://doc.rust-lang.org/nightly/std/time/struct.Duration.html
3084 [`Error`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html
3085 [`File`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html
3086 [`Hash`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html
3087 [`Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
3088 [`Send`]: http://doc.rust-lang.org/nightly/std/marker/trait.Send.html
3089 [`SliceConcatExt`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html
3090 [`Stdin`]: http://doc.rust-lang.org/nightly/std/io/struct.Stdin.html
3091 [`ToOwned`]: http://doc.rust-lang.org/nightly/std/borrow/trait.ToOwned.html
3092 [`Wrapping`]: http://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
3093 [`connect`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.connect
3094 [`downcast_mut`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_mut
3095 [`downcast_ref`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_ref
3096 [`downcast`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast
3097 [`hash_slice`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
3098 [`id`]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html#method.id
3099 [`is`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.is
3100 [`join`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.join
3101 [`read_to_end`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_to_end
3102 [ar]: https://github.com/rust-lang/rust/pull/26926
3103 [b14]: https://static.rust-lang.org/dist/rust-beta-x86_64-pc-windows-msvc.msi
3104 [dms]: https://github.com/rust-lang/rust/pull/26241
3105 [dropck]: https://github.com/rust-lang/rust/pull/27261
3106 [dropckrfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
3107 [ds]: https://github.com/rust-lang/rust/pull/26818
3108 [dst1]: http://doc.rust-lang.org/nightly/std/mem/fn.size_of_val.html
3109 [dst2]: http://doc.rust-lang.org/nightly/std/mem/fn.align_of_val.html
3110 [dst3]: https://github.com/rust-lang/rust/pull/27351
3111 [e]: https://github.com/rust-lang/rust/pull/24793
3112 [f]: https://github.com/rust-lang/rust/pull/26588
3113 [fb]: https://github.com/rust-lang/rust/pull/26959
3114 [fl]: https://github.com/rust-lang/rust-installer/pull/41
3115 [hs]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
3116 [ie]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html
3117 [iec]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.cause
3118 [iegm]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_mut
3119 [iegr]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_ref
3120 [ieii]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.into_inner
3121 [lic]: https://github.com/rust-lang/rust/pull/26583
3122 [lnu]: https://github.com/rust-lang/rust/pull/27026
3123 [lr]: https://github.com/rust-lang/rust/issues/27248
3124 [lum]: https://github.com/rust-lang/rust/pull/26378
3125 [lur]: https://github.com/rust-lang/rust/pull/26783
3126 [nlp]: https://github.com/rust-lang/rust/pull/27176
3127 [nold2]: https://github.com/rust-lang/rust/pull/27045
3128 [nold]: https://github.com/rust-lang/rfcs/blob/master/text/1156-adjust-default-object-bounds.md
3129 [nom]: http://doc.rust-lang.org/nightly/nomicon/
3130 [pc]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html
3131 [pi]: https://github.com/rust-lang/rust/pull/26699
3132 [ps]: https://github.com/rust-lang/rust/pull/26884
3133 [rte]: https://github.com/rust-lang/rust/pull/26950
3134 [sc]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.contains
3135 [search]: https://github.com/rust-lang/rust/pull/26327
3136 [sew]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.ends_with
3137 [sf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.find
3138 [sh]: https://github.com/rust-lang/rust/pull/27280
3139 [srf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rfind
3140 [ss]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split
3141 [ssw]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.starts_with
3142 [st]: https://github.com/rust-lang/rust/pull/26630
3143 [win1]: https://github.com/rust-lang/rust/pull/26569
3144 [win2]: https://github.com/rust-lang/rust/pull/26741
3145 [win3]: https://github.com/rust-lang/rust/pull/26741
3146 [win4]: https://github.com/rust-lang/rust/pull/27210
3147 [xp]: https://github.com/rust-lang/rust/pull/26569
3149 Version 1.2.0 (2015-08-07)
3150 ==========================
3152 * ~1200 changes, numerous bugfixes
3157 * [Dynamically-sized-type coercions][dst] allow smart pointer types
3158 like `Rc` to contain types without a fixed size, arrays and trait
3159 objects, finally enabling use of `Rc<[T]>` and completing the
3160 implementation of DST.
3161 * [Parallel codegen][parcodegen] is now working again, which can
3162 substantially speed up large builds in debug mode; It also gets
3163 another ~33% speedup when bootstrapping on a 4 core machine (using 8
3164 jobs). It's not enabled by default, but will be "in the near
3165 future". It can be activated with the `-C codegen-units=N` flag to
3167 * This is the first release with [experimental support for linking
3168 with the MSVC linker and lib C on Windows (instead of using the GNU
3169 variants via MinGW)][win]. It is yet recommended only for the most
3170 intrepid Rusticians.
3171 * Benchmark compilations are showing a 30% improvement in
3172 bootstrapping over 1.1.
3177 * The [`to_uppercase`] and [`to_lowercase`] methods on `char` now do
3178 unicode case mapping, which is a previously-planned change in
3179 behavior and considered a bugfix.
3180 * [`mem::align_of`] now specifies [the *minimum alignment* for
3181 T][align], which is usually the alignment programs are interested
3182 in, and the same value reported by clang's
3183 `alignof`. [`mem::min_align_of`] is deprecated. This is not known to
3185 * [The `#[packed]` attribute is no longer silently accepted by the
3186 compiler][packed]. This attribute did nothing and code that
3187 mentioned it likely did not work as intended.
3188 * Associated type defaults are [now behind the
3189 `associated_type_defaults` feature gate][ad]. In 1.1 associated type
3190 defaults *did not work*, but could be mentioned syntactically. As
3191 such this breakage has minimal impact.
3196 * Patterns with `ref mut` now correctly invoke [`DerefMut`] when
3197 matching against dereferencable values.
3202 * The [`Extend`] trait, which grows a collection from an iterator, is
3203 implemented over iterators of references, for `String`, `Vec`,
3204 `LinkedList`, `VecDeque`, `EnumSet`, `BinaryHeap`, `VecMap`,
3205 `BTreeSet` and `BTreeMap`. [RFC][extend-rfc].
3206 * The [`iter::once`] function returns an iterator that yields a single
3207 element, and [`iter::empty`] returns an iterator that yields no
3209 * The [`matches`] and [`rmatches`] methods on `str` return iterators
3210 over substring matches.
3211 * [`Cell`] and [`RefCell`] both implement `Eq`.
3212 * A number of methods for wrapping arithmetic are added to the
3213 integral types, [`wrapping_div`], [`wrapping_rem`],
3214 [`wrapping_neg`], [`wrapping_shl`], [`wrapping_shr`]. These are in
3215 addition to the existing [`wrapping_add`], [`wrapping_sub`], and
3216 [`wrapping_mul`] methods, and alternatives to the [`Wrapping`]
3217 type.. It is illegal for the default arithmetic operations in Rust
3218 to overflow; the desire to wrap must be explicit.
3219 * The `{:#?}` formatting specifier [displays the alternate,
3220 pretty-printed][debugfmt] form of the `Debug` formatter. This
3221 feature was actually introduced prior to 1.0 with little
3223 * [`fmt::Formatter`] implements [`fmt::Write`], a `fmt`-specific trait
3224 for writing data to formatted strings, similar to [`io::Write`].
3225 * [`fmt::Formatter`] adds 'debug builder' methods, [`debug_struct`],
3226 [`debug_tuple`], [`debug_list`], [`debug_set`], [`debug_map`]. These
3227 are used by code generators to emit implementations of [`Debug`].
3228 * `str` has new [`to_uppercase`][strup] and [`to_lowercase`][strlow]
3229 methods that convert case, following Unicode case mapping.
3230 * It is now easier to handle poisoned locks. The [`PoisonError`]
3231 type, returned by failing lock operations, exposes `into_inner`,
3232 `get_ref`, and `get_mut`, which all give access to the inner lock
3233 guard, and allow the poisoned lock to continue to operate. The
3234 `is_poisoned` method of [`RwLock`] and [`Mutex`] can poll for a
3235 poisoned lock without attempting to take the lock.
3236 * On Unix the [`FromRawFd`] trait is implemented for [`Stdio`], and
3237 [`AsRawFd`] for [`ChildStdin`], [`ChildStdout`], [`ChildStderr`].
3238 On Windows the `FromRawHandle` trait is implemented for `Stdio`,
3239 and `AsRawHandle` for `ChildStdin`, `ChildStdout`,
3241 * [`io::ErrorKind`] has a new variant, `InvalidData`, which indicates
3247 * `rustc` employs smarter heuristics for guessing at [typos].
3248 * `rustc` emits more efficient code for [no-op conversions between
3249 unsafe pointers][nop].
3250 * Fat pointers are now [passed in pairs of immediate arguments][fat],
3251 resulting in faster compile times and smaller code.
3253 [`Extend`]: https://doc.rust-lang.org/nightly/std/iter/trait.Extend.html
3254 [extend-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
3255 [`iter::once`]: https://doc.rust-lang.org/nightly/std/iter/fn.once.html
3256 [`iter::empty`]: https://doc.rust-lang.org/nightly/std/iter/fn.empty.html
3257 [`matches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.matches
3258 [`rmatches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatches
3259 [`Cell`]: https://doc.rust-lang.org/nightly/std/cell/struct.Cell.html
3260 [`RefCell`]: https://doc.rust-lang.org/nightly/std/cell/struct.RefCell.html
3261 [`wrapping_add`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_add
3262 [`wrapping_sub`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_sub
3263 [`wrapping_mul`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_mul
3264 [`wrapping_div`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_div
3265 [`wrapping_rem`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_rem
3266 [`wrapping_neg`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_neg
3267 [`wrapping_shl`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shl
3268 [`wrapping_shr`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shr
3269 [`Wrapping`]: https://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
3270 [`fmt::Formatter`]: https://doc.rust-lang.org/nightly/std/fmt/struct.Formatter.html
3271 [`fmt::Write`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Write.html
3272 [`io::Write`]: https://doc.rust-lang.org/nightly/std/io/trait.Write.html
3273 [`debug_struct`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_struct
3274 [`debug_tuple`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_tuple
3275 [`debug_list`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_list
3276 [`debug_set`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_set
3277 [`debug_map`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_map
3278 [`Debug`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
3279 [strup]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_uppercase
3280 [strlow]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_lowercase
3281 [`to_uppercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_uppercase
3282 [`to_lowercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_lowercase
3283 [`PoisonError`]: https://doc.rust-lang.org/nightly/std/sync/struct.PoisonError.html
3284 [`RwLock`]: https://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html
3285 [`Mutex`]: https://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html
3286 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
3287 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
3288 [`Stdio`]: https://doc.rust-lang.org/nightly/std/process/struct.Stdio.html
3289 [`ChildStdin`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdin.html
3290 [`ChildStdout`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdout.html
3291 [`ChildStderr`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStderr.html
3292 [`io::ErrorKind`]: https://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html
3293 [debugfmt]: https://www.reddit.com/r/rust/comments/3ceaui/psa_produces_prettyprinted_debug_output/
3294 [`DerefMut`]: https://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
3295 [`mem::align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.align_of.html
3296 [align]: https://github.com/rust-lang/rust/pull/25646
3297 [`mem::min_align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.min_align_of.html
3298 [typos]: https://github.com/rust-lang/rust/pull/26087
3299 [nop]: https://github.com/rust-lang/rust/pull/26336
3300 [fat]: https://github.com/rust-lang/rust/pull/26411
3301 [dst]: https://github.com/rust-lang/rfcs/blob/master/text/0982-dst-coercion.md
3302 [parcodegen]: https://github.com/rust-lang/rust/pull/26018
3303 [packed]: https://github.com/rust-lang/rust/pull/25541
3304 [ad]: https://github.com/rust-lang/rust/pull/27382
3305 [win]: https://github.com/rust-lang/rust/pull/25350
3307 Version 1.1.0 (2015-06-25)
3308 =========================
3310 * ~850 changes, numerous bugfixes
3315 * The [`std::fs` module has been expanded][fs] to expand the set of
3316 functionality exposed:
3317 * `DirEntry` now supports optimizations like `file_type` and `metadata` which
3318 don't incur a syscall on some platforms.
3319 * A `symlink_metadata` function has been added.
3320 * The `fs::Metadata` structure now lowers to its OS counterpart, providing
3321 access to all underlying information.
3322 * The compiler now contains extended explanations of many errors. When an error
3323 with an explanation occurs the compiler suggests using the `--explain` flag
3324 to read the explanation. Error explanations are also [available online][err-index].
3325 * Thanks to multiple [improvements][sk] to [type checking][pre], as
3326 well as other work, the time to bootstrap the compiler decreased by
3332 * The [`str::split_whitespace`] method splits a string on unicode
3333 whitespace boundaries.
3334 * On both Windows and Unix, new extension traits provide conversion of
3335 I/O types to and from the underlying system handles. On Unix, these
3336 traits are [`FromRawFd`] and [`AsRawFd`], on Windows `FromRawHandle`
3337 and `AsRawHandle`. These are implemented for `File`, `TcpStream`,
3338 `TcpListener`, and `UpdSocket`. Further implementations for
3339 `std::process` will be stabilized later.
3340 * On Unix, [`std::os::unix::symlink`] creates symlinks. On
3341 Windows, symlinks can be created with
3342 `std::os::windows::symlink_dir` and
3343 `std::os::windows::symlink_file`.
3344 * The `mpsc::Receiver` type can now be converted into an iterator with
3345 `into_iter` on the [`IntoIterator`] trait.
3346 * `Ipv4Addr` can be created from `u32` with the `From<u32>`
3347 implementation of the [`From`] trait.
3348 * The `Debug` implementation for `RangeFull` [creates output that is
3349 more consistent with other implementations][rf].
3350 * [`Debug` is implemented for `File`][file].
3351 * The `Default` implementation for `Arc` [no longer requires `Sync +
3353 * [The `Iterator` methods `count`, `nth`, and `last` have been
3354 overridden for slices to have O(1) performance instead of O(n)][si].
3355 * Incorrect handling of paths on Windows has been improved in both the
3356 compiler and the standard library.
3357 * [`AtomicPtr` gained a `Default` implementation][ap].
3358 * In accordance with Rust's policy on arithmetic overflow `abs` now
3359 [panics on overflow when debug assertions are enabled][abs].
3360 * The [`Cloned`] iterator, which was accidentally left unstable for
3361 1.0 [has been stabilized][c].
3362 * The [`Incoming`] iterator, which iterates over incoming TCP
3363 connections, and which was accidentally unnamable in 1.0, [is now
3364 properly exported][inc].
3365 * [`BinaryHeap`] no longer corrupts itself [when functions called by
3366 `sift_up` or `sift_down` panic][bh].
3367 * The [`split_off`] method of `LinkedList` [no longer corrupts
3368 the list in certain scenarios][ll].
3373 * Type checking performance [has improved notably][sk] with
3374 [multiple improvements][pre].
3375 * The compiler [suggests code changes][ch] for more errors.
3376 * rustc and it's build system have experimental support for [building
3377 toolchains against MUSL][m] instead of glibc on Linux.
3378 * The compiler defines the `target_env` cfg value, which is used for
3379 distinguishing toolchains that are otherwise for the same
3380 platform. Presently this is set to `gnu` for common GNU Linux
3381 targets and for MinGW targets, and `musl` for MUSL Linux targets.
3382 * The [`cargo rustc`][crc] command invokes a build with custom flags
3384 * [Android executables are always position independent][pie].
3385 * [The `drop_with_repr_extern` lint warns about mixing `repr(C)`
3388 [`str::split_whitespace`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_whitespace
3389 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
3390 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
3391 [`std::os::unix::symlink`]: https://doc.rust-lang.org/nightly/std/os/unix/fs/fn.symlink.html
3392 [`IntoIterator`]: https://doc.rust-lang.org/nightly/std/iter/trait.IntoIterator.html
3393 [`From`]: https://doc.rust-lang.org/nightly/std/convert/trait.From.html
3394 [rf]: https://github.com/rust-lang/rust/pull/24491
3395 [err-index]: https://doc.rust-lang.org/error-index.html
3396 [sk]: https://github.com/rust-lang/rust/pull/24615
3397 [pre]: https://github.com/rust-lang/rust/pull/25323
3398 [file]: https://github.com/rust-lang/rust/pull/24598
3399 [ch]: https://github.com/rust-lang/rust/pull/24683
3400 [arc]: https://github.com/rust-lang/rust/pull/24695
3401 [si]: https://github.com/rust-lang/rust/pull/24701
3402 [ap]: https://github.com/rust-lang/rust/pull/24834
3403 [m]: https://github.com/rust-lang/rust/pull/24777
3404 [fs]: https://github.com/rust-lang/rfcs/blob/master/text/1044-io-fs-2.1.md
3405 [crc]: https://github.com/rust-lang/cargo/pull/1568
3406 [pie]: https://github.com/rust-lang/rust/pull/24953
3407 [abs]: https://github.com/rust-lang/rust/pull/25441
3408 [c]: https://github.com/rust-lang/rust/pull/25496
3409 [`Cloned`]: https://doc.rust-lang.org/nightly/std/iter/struct.Cloned.html
3410 [`Incoming`]: https://doc.rust-lang.org/nightly/std/net/struct.Incoming.html
3411 [inc]: https://github.com/rust-lang/rust/pull/25522
3412 [bh]: https://github.com/rust-lang/rust/pull/25856
3413 [`BinaryHeap`]: https://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html
3414 [ll]: https://github.com/rust-lang/rust/pull/26022
3415 [`split_off`]: https://doc.rust-lang.org/nightly/collections/linked_list/struct.LinkedList.html#method.split_off
3416 [drop]: https://github.com/rust-lang/rust/pull/24935
3418 Version 1.0.0 (2015-05-15)
3419 ========================
3421 * ~1500 changes, numerous bugfixes
3426 * The vast majority of the standard library is now `#[stable]`. It is
3427 no longer possible to use unstable features with a stable build of
3429 * Many popular crates on [crates.io] now work on the stable release
3431 * Arithmetic on basic integer types now [checks for overflow in debug
3437 * Several [restrictions have been added to trait coherence][coh] in
3438 order to make it easier for upstream authors to change traits
3439 without breaking downstream code.
3440 * Digits of binary and octal literals are [lexed more eagerly][lex] to
3441 improve error messages and macro behavior. For example, `0b1234` is
3442 now lexed as `0b1234` instead of two tokens, `0b1` and `234`.
3443 * Trait bounds [are always invariant][inv], eliminating the need for
3444 the `PhantomFn` and `MarkerTrait` lang items, which have been
3446 * ["-" is no longer a valid character in crate names][cr], the `extern crate
3447 "foo" as bar` syntax has been replaced with `extern crate foo as
3448 bar`, and Cargo now automatically translates "-" in *package* names
3449 to underscore for the crate name.
3450 * [Lifetime shadowing is an error][lt].
3451 * [`Send` no longer implies `'static`][send-rfc].
3452 * [UFCS now supports trait-less associated paths][moar-ufcs] like
3453 `MyType::default()`.
3454 * Primitive types [now have inherent methods][prim-inherent],
3455 obviating the need for extension traits like `SliceExt`.
3456 * Methods with `Self: Sized` in their `where` clause are [considered
3457 object-safe][self-sized], allowing many extension traits like
3458 `IteratorExt` to be merged into the traits they extended.
3459 * You can now [refer to associated types][assoc-where] whose
3460 corresponding trait bounds appear only in a `where` clause.
3461 * The final bits of [OIBIT landed][oibit-final], meaning that traits
3462 like `Send` and `Sync` are now library-defined.
3463 * A [Reflect trait][reflect] was introduced, which means that
3464 downcasting via the `Any` trait is effectively limited to concrete
3465 types. This helps retain the potentially-important "parametricity"
3466 property: generic code cannot behave differently for different type
3467 arguments except in minor ways.
3468 * The `unsafe_destructor` feature is now deprecated in favor of the
3469 [new `dropck`][dropck]. This change is a major reduction in unsafe
3475 * The `thread_local` module [has been renamed to `std::thread`][th].
3476 * The methods of `IteratorExt` [have been moved to the `Iterator`
3478 * Several traits that implement Rust's conventions for type
3479 conversions, `AsMut`, `AsRef`, `From`, and `Into` have been
3480 [centralized in the `std::convert` module][con].
3481 * The `FromError` trait [was removed in favor of `From`][fe].
3482 * The basic sleep function [has moved to
3483 `std::thread::sleep_ms`][slp].
3484 * The `splitn` function now takes an `n` parameter that represents the
3485 number of items yielded by the returned iterator [instead of the
3486 number of 'splits'][spl].
3487 * [On Unix, all file descriptors are `CLOEXEC` by default][clo].
3488 * [Derived implementations of `PartialOrd` now order enums according
3489 to their explicitly-assigned discriminants][po].
3490 * [Methods for searching strings are generic over `Pattern`s][pat],
3491 implemented presently by `&char`, `&str`, `FnMut(char) -> bool` and
3493 * [In method resolution, object methods are resolved before inherent
3495 * [`String::from_str` has been deprecated in favor of the `From` impl,
3496 `String::from`][sf].
3497 * [`io::Error` implements `Sync`][ios].
3498 * [The `words` method on `&str` has been replaced with
3499 `split_whitespace`][sw], to avoid answering the tricky question, 'what is
3501 * The new path and IO modules are complete and `#[stable]`. This
3502 was the major library focus for this cycle.
3503 * The path API was [revised][path-normalize] to normalize `.`,
3504 adjusting the tradeoffs in favor of the most common usage.
3505 * A large number of remaining APIs in `std` were also stabilized
3506 during this cycle; about 75% of the non-deprecated API surface
3508 * The new [string pattern API][string-pattern] landed, which makes
3509 the string slice API much more internally consistent and flexible.
3510 * A new set of [generic conversion traits][conversion] replaced
3511 many existing ad hoc traits.
3512 * Generic numeric traits were [completely removed][num-traits]. This
3513 was made possible thanks to inherent methods for primitive types,
3514 and the removal gives maximal flexibility for designing a numeric
3515 hierarchy in the future.
3516 * The `Fn` traits are now related via [inheritance][fn-inherit]
3517 and provide ergonomic [blanket implementations][fn-blanket].
3518 * The `Index` and `IndexMut` traits were changed to
3519 [take the index by value][index-value], enabling code like
3520 `hash_map["string"]` to work.
3521 * `Copy` now [inherits][copy-clone] from `Clone`, meaning that all
3522 `Copy` data is known to be `Clone` as well.
3527 * Many errors now have extended explanations that can be accessed with
3528 the `--explain` flag to `rustc`.
3529 * Many new examples have been added to the standard library
3531 * rustdoc has received a number of improvements focused on completion
3533 * Metadata was tuned, shrinking binaries [by 27%][metadata-shrink].
3534 * Much headway was made on ecosystem-wide CI, making it possible
3535 to [compare builds for breakage][ci-compare].
3538 [crates.io]: http://crates.io
3539 [clo]: https://github.com/rust-lang/rust/pull/24034
3540 [coh]: https://github.com/rust-lang/rfcs/blob/master/text/1023-rebalancing-coherence.md
3541 [con]: https://github.com/rust-lang/rust/pull/23875
3542 [cr]: https://github.com/rust-lang/rust/pull/23419
3543 [fe]: https://github.com/rust-lang/rust/pull/23879
3544 [ie]: https://github.com/rust-lang/rust/pull/23300
3545 [inv]: https://github.com/rust-lang/rust/pull/23938
3546 [ios]: https://github.com/rust-lang/rust/pull/24133
3547 [lex]: https://github.com/rust-lang/rfcs/blob/master/text/0879-small-base-lexing.md
3548 [lt]: https://github.com/rust-lang/rust/pull/24057
3549 [meth]: https://github.com/rust-lang/rust/pull/24056
3550 [pat]: https://github.com/rust-lang/rfcs/blob/master/text/0528-string-patterns.md
3551 [po]: https://github.com/rust-lang/rust/pull/24270
3552 [sf]: https://github.com/rust-lang/rust/pull/24517
3553 [slp]: https://github.com/rust-lang/rust/pull/23949
3554 [spl]: https://github.com/rust-lang/rfcs/blob/master/text/0979-align-splitn-with-other-languages.md
3555 [sw]: https://github.com/rust-lang/rfcs/blob/master/text/1054-str-words.md
3556 [th]: https://github.com/rust-lang/rfcs/blob/master/text/0909-move-thread-local-to-std-thread.md
3557 [send-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0458-send-improvements.md
3558 [moar-ufcs]: https://github.com/rust-lang/rust/pull/22172
3559 [prim-inherent]: https://github.com/rust-lang/rust/pull/23104
3560 [overflow]: https://github.com/rust-lang/rfcs/blob/master/text/0560-integer-overflow.md
3561 [metadata-shrink]: https://github.com/rust-lang/rust/pull/22971
3562 [self-sized]: https://github.com/rust-lang/rust/pull/22301
3563 [assoc-where]: https://github.com/rust-lang/rust/pull/22512
3564 [string-pattern]: https://github.com/rust-lang/rust/pull/22466
3565 [oibit-final]: https://github.com/rust-lang/rust/pull/21689
3566 [reflect]: https://github.com/rust-lang/rust/pull/23712
3567 [conversion]: https://github.com/rust-lang/rfcs/pull/529
3568 [num-traits]: https://github.com/rust-lang/rust/pull/23549
3569 [index-value]: https://github.com/rust-lang/rust/pull/23601
3570 [dropck]: https://github.com/rust-lang/rfcs/pull/769
3571 [ci-compare]: https://gist.github.com/brson/a30a77836fbec057cbee
3572 [fn-inherit]: https://github.com/rust-lang/rust/pull/23282
3573 [fn-blanket]: https://github.com/rust-lang/rust/pull/23895
3574 [copy-clone]: https://github.com/rust-lang/rust/pull/23860
3575 [path-normalize]: https://github.com/rust-lang/rust/pull/23229
3578 Version 1.0.0-alpha.2 (2015-02-20)
3579 =====================================
3581 * ~1300 changes, numerous bugfixes
3585 * The various I/O modules were [overhauled][io-rfc] to reduce
3586 unnecessary abstractions and provide better interoperation with
3587 the underlying platform. The old `io` module remains temporarily
3589 * The standard library now [participates in feature gating][feat],
3590 so use of unstable libraries now requires a `#![feature(...)]`
3591 attribute. The impact of this change is [described on the
3592 forum][feat-forum]. [RFC][feat-rfc].
3596 * `for` loops [now operate on the `IntoIterator` trait][into],
3597 which eliminates the need to call `.iter()`, etc. to iterate
3598 over collections. There are some new subtleties to remember
3599 though regarding what sort of iterators various types yield, in
3600 particular that `for foo in bar { }` yields values from a move
3601 iterator, destroying the original collection. [RFC][into-rfc].
3602 * Objects now have [default lifetime bounds][obj], so you don't
3603 have to write `Box<Trait+'static>` when you don't care about
3604 storing references. [RFC][obj-rfc].
3605 * In types that implement `Drop`, [lifetimes must outlive the
3606 value][drop]. This will soon make it possible to safely
3607 implement `Drop` for types where `#[unsafe_destructor]` is now
3608 required. Read the [gorgeous RFC][drop-rfc] for details.
3609 * The fully qualified <T as Trait>::X syntax lets you set the Self
3610 type for a trait method or associated type. [RFC][ufcs-rfc].
3611 * References to types that implement `Deref<U>` now [automatically
3612 coerce to references][deref] to the dereferenced type `U`,
3613 e.g. `&T where T: Deref<U>` automatically coerces to `&U`. This
3614 should eliminate many unsightly uses of `&*`, as when converting
3615 from references to vectors into references to
3616 slices. [RFC][deref-rfc].
3617 * The explicit [closure kind syntax][close] (`|&:|`, `|&mut:|`,
3618 `|:|`) is obsolete and closure kind is inferred from context.
3619 * [`Self` is a keyword][Self].
3623 * The `Show` and `String` formatting traits [have been
3624 renamed][fmt] to `Debug` and `Display` to more clearly reflect
3625 their related purposes. Automatically getting a string
3626 conversion to use with `format!("{:?}", something_to_debug)` is
3627 now written `#[derive(Debug)]`.
3628 * Abstract [OS-specific string types][osstr], `std::ff::{OsString,
3629 OsStr}`, provide strings in platform-specific encodings for easier
3630 interop with system APIs. [RFC][osstr-rfc].
3631 * The `boxed::into_raw` and `Box::from_raw` functions [convert
3632 between `Box<T>` and `*mut T`][boxraw], a common pattern for
3633 creating raw pointers.
3637 * Certain long error messages of the form 'expected foo found bar'
3638 are now [split neatly across multiple
3639 lines][multiline]. Examples in the PR.
3640 * On Unix Rust can be [uninstalled][un] by running
3641 `/usr/local/lib/rustlib/uninstall.sh`.
3642 * The `#[rustc_on_unimplemented]` attribute, requiring the
3643 'on_unimplemented' feature, lets rustc [display custom error
3644 messages when a trait is expected to be implemented for a type
3649 * Rust is tested against a [LALR grammar][lalr], which parses
3650 almost all the Rust files that rustc does.
3652 [boxraw]: https://github.com/rust-lang/rust/pull/21318
3653 [close]: https://github.com/rust-lang/rust/pull/21843
3654 [deref]: https://github.com/rust-lang/rust/pull/21351
3655 [deref-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0241-deref-conversions.md
3656 [drop]: https://github.com/rust-lang/rust/pull/21972
3657 [drop-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
3658 [feat]: https://github.com/rust-lang/rust/pull/21248
3659 [feat-forum]: https://users.rust-lang.org/t/psa-important-info-about-rustcs-new-feature-staging/82/5
3660 [feat-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0507-release-channels.md
3661 [fmt]: https://github.com/rust-lang/rust/pull/21457
3662 [into]: https://github.com/rust-lang/rust/pull/20790
3663 [into-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md#intoiterator-and-iterable
3664 [io-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
3665 [lalr]: https://github.com/rust-lang/rust/pull/21452
3666 [multiline]: https://github.com/rust-lang/rust/pull/19870
3667 [obj]: https://github.com/rust-lang/rust/pull/22230
3668 [obj-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0599-default-object-bound.md
3669 [onun]: https://github.com/rust-lang/rust/pull/20889
3670 [osstr]: https://github.com/rust-lang/rust/pull/21488
3671 [osstr-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
3672 [Self]: https://github.com/rust-lang/rust/pull/22158
3673 [ufcs-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0132-ufcs.md
3674 [un]: https://github.com/rust-lang/rust/pull/22256
3677 Version 1.0.0-alpha (2015-01-09)
3678 ==================================
3680 * ~2400 changes, numerous bugfixes
3684 * The language itself is considered feature complete for 1.0,
3685 though there will be many usability improvements and bugfixes
3686 before the final release.
3687 * Nearly 50% of the public API surface of the standard library has
3688 been declared 'stable'. Those interfaces are unlikely to change
3690 * The long-running debate over integer types has been
3691 [settled][ints]: Rust will ship with types named `isize` and
3692 `usize`, rather than `int` and `uint`, for pointer-sized
3693 integers. Guidelines will be rolled out during the alpha cycle.
3694 * Most crates that are not `std` have been moved out of the Rust
3695 distribution into the Cargo ecosystem so they can evolve
3696 separately and don't need to be stabilized as quickly, including
3697 'time', 'getopts', 'num', 'regex', and 'term'.
3698 * Documentation continues to be expanded with more API coverage, more
3699 examples, and more in-depth explanations. The guides have been
3700 consolidated into [The Rust Programming Language][trpl].
3701 * "[Rust By Example][rbe]" is now maintained by the Rust team.
3702 * All official Rust binary installers now come with [Cargo], the
3703 Rust package manager.
3707 * Closures have been [completely redesigned][unboxed] to be
3708 implemented in terms of traits, can now be used as generic type
3709 bounds and thus monomorphized and inlined, or via an opaque
3710 pointer (boxed) as in the old system. The new system is often
3711 referred to as 'unboxed' closures.
3712 * Traits now support [associated types][assoc], allowing families
3713 of related types to be defined together and used generically in
3715 * Enum variants are [namespaced by their type names][enum].
3716 * [`where` clauses][where] provide a more versatile and attractive
3717 syntax for specifying generic bounds, though the previous syntax
3719 * Rust again picks a [fallback][fb] (either i32 or f64) for uninferred
3721 * Rust [no longer has a runtime][rt] of any description, and only
3722 supports OS threads, not green threads.
3723 * At long last, Rust has been overhauled for 'dynamically-sized
3724 types' ([DST]), which integrates 'fat pointers' (object types,
3725 arrays, and `str`) more deeply into the type system, making it
3727 * Rust now has a general [range syntax][range], `i..j`, `i..`, and
3728 `..j` that produce range types and which, when combined with the
3729 `Index` operator and multidispatch, leads to a convenient slice
3731 * The new range syntax revealed an ambiguity in the fixed-length
3732 array syntax, so now fixed length arrays [are written `[T;
3734 * The `Copy` trait is no longer implemented automatically. Unsafe
3735 pointers no longer implement `Sync` and `Send` so types
3736 containing them don't automatically either. `Sync` and `Send`
3737 are now 'unsafe traits' so one can "forcibly" implement them via
3738 `unsafe impl` if a type confirms to the requirements for them
3739 even though the internals do not (e.g. structs containing unsafe
3740 pointers like `Arc`). These changes are intended to prevent some
3741 footguns and are collectively known as [opt-in built-in
3742 traits][oibit] (though `Sync` and `Send` will soon become pure
3743 library types unknown to the compiler).
3744 * Operator traits now take their operands [by value][ops], and
3745 comparison traits can use multidispatch to compare one type
3746 against multiple other types, allowing e.g. `String` to be
3747 compared with `&str`.
3748 * `if let` and `while let` are no longer feature-gated.
3749 * Rust has adopted a more [uniform syntax for escaping unicode
3750 characters][unicode].
3751 * `macro_rules!` [has been declared stable][mac]. Though it is a
3752 flawed system it is sufficiently popular that it must be usable
3753 for 1.0. Effort has gone into [future-proofing][mac-future] it
3754 in ways that will allow other macro systems to be developed in
3755 parallel, and won't otherwise impact the evolution of the
3757 * The prelude has been [pared back significantly][prelude] such
3758 that it is the minimum necessary to support the most pervasive
3759 code patterns, and through [generalized where clauses][where]
3760 many of the prelude extension traits have been consolidated.
3761 * Rust's rudimentary reflection [has been removed][refl], as it
3762 incurred too much code generation for little benefit.
3763 * [Struct variants][structvars] are no longer feature-gated.
3764 * Trait bounds can be [polymorphic over lifetimes][hrtb]. Also
3765 known as 'higher-ranked trait bounds', this crucially allows
3766 unboxed closures to work.
3767 * Macros invocations surrounded by parens or square brackets and
3768 not terminated by a semicolon are [parsed as
3769 expressions][macros], which makes expressions like `vec![1i32,
3770 2, 3].len()` work as expected.
3771 * Trait objects now implement their traits automatically, and
3772 traits that can be coerced to objects now must be [object
3774 * Automatically deriving traits is now done with `#[derive(...)]`
3775 not `#[deriving(...)]` for [consistency with other naming
3776 conventions][derive].
3777 * Importing the containing module or enum at the same time as
3778 items or variants they contain is [now done with `self` instead
3779 of `mod`][self], as in use `foo::{self, bar}`
3780 * Glob imports are no longer feature-gated.
3781 * The `box` operator and `box` patterns have been feature-gated
3782 pending a redesign. For now unique boxes should be allocated
3783 like other containers, with `Box::new`.
3787 * A [series][coll1] of [efforts][coll2] to establish
3788 [conventions][coll3] for collections types has resulted in API
3789 improvements throughout the standard library.
3790 * New [APIs for error handling][err] provide ergonomic interop
3791 between error types, and [new conventions][err-conv] describe
3792 more clearly the recommended error handling strategies in Rust.
3793 * The `fail!` macro has been renamed to [`panic!`][panic] so that
3794 it is easier to discuss failure in the context of error handling
3795 without making clarifications as to whether you are referring to
3796 the 'fail' macro or failure more generally.
3797 * On Linux, `OsRng` prefers the new, more reliable `getrandom`
3798 syscall when available.
3799 * The 'serialize' crate has been renamed 'rustc-serialize' and
3800 moved out of the distribution to Cargo. Although it is widely
3801 used now, it is expected to be superseded in the near future.
3802 * The `Show` formatter, typically implemented with
3803 `#[derive(Show)]` is [now requested with the `{:?}`
3804 specifier][show] and is intended for use by all types, for uses
3805 such as `println!` debugging. The new `String` formatter must be
3806 implemented by hand, uses the `{}` specifier, and is intended
3807 for full-fidelity conversions of things that can logically be
3808 represented as strings.
3812 * [Flexible target specification][flex] allows rustc's code
3813 generation to be configured to support otherwise-unsupported
3815 * Rust comes with rust-gdb and rust-lldb scripts that launch their
3816 respective debuggers with Rust-appropriate pretty-printing.
3817 * The Windows installation of Rust is distributed with the
3818 MinGW components currently required to link binaries on that
3823 * Nullable enum optimizations have been extended to more types so
3824 that e.g. `Option<Vec<T>>` and `Option<String>` take up no more
3825 space than the inner types themselves.
3826 * Work has begun on supporting AArch64.
3828 [Cargo]: https://crates.io
3829 [unboxed]: http://smallcultfollowing.com/babysteps/blog/2014/11/26/purging-proc/
3830 [enum]: https://github.com/rust-lang/rfcs/blob/master/text/0390-enum-namespacing.md
3831 [flex]: https://github.com/rust-lang/rfcs/blob/master/text/0131-target-specification.md
3832 [err]: https://github.com/rust-lang/rfcs/blob/master/text/0201-error-chaining.md
3833 [err-conv]: https://github.com/rust-lang/rfcs/blob/master/text/0236-error-conventions.md
3834 [rt]: https://github.com/rust-lang/rfcs/blob/master/text/0230-remove-runtime.md
3835 [mac]: https://github.com/rust-lang/rfcs/blob/master/text/0453-macro-reform.md
3836 [mac-future]: https://github.com/rust-lang/rfcs/pull/550
3837 [DST]: http://smallcultfollowing.com/babysteps/blog/2014/01/05/dst-take-5/
3838 [coll1]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md
3839 [coll2]: https://github.com/rust-lang/rfcs/blob/master/text/0509-collections-reform-part-2.md
3840 [coll3]: https://github.com/rust-lang/rfcs/blob/master/text/0216-collection-views.md
3841 [ops]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md
3842 [prelude]: https://github.com/rust-lang/rfcs/blob/master/text/0503-prelude-stabilization.md
3843 [where]: https://github.com/rust-lang/rfcs/blob/master/text/0135-where.md
3844 [refl]: https://github.com/rust-lang/rfcs/blob/master/text/0379-remove-reflection.md
3845 [panic]: https://github.com/rust-lang/rfcs/blob/master/text/0221-panic.md
3846 [structvars]: https://github.com/rust-lang/rfcs/blob/master/text/0418-struct-variants.md
3847 [hrtb]: https://github.com/rust-lang/rfcs/blob/master/text/0387-higher-ranked-trait-bounds.md
3848 [unicode]: https://github.com/rust-lang/rfcs/blob/master/text/0446-es6-unicode-escapes.md
3849 [oibit]: https://github.com/rust-lang/rfcs/blob/master/text/0019-opt-in-builtin-traits.md
3850 [macros]: https://github.com/rust-lang/rfcs/blob/master/text/0378-expr-macros.md
3851 [range]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md#indexing-and-slicing
3852 [arrays]: https://github.com/rust-lang/rfcs/blob/master/text/0520-new-array-repeat-syntax.md
3853 [show]: https://github.com/rust-lang/rfcs/blob/master/text/0504-show-stabilization.md
3854 [derive]: https://github.com/rust-lang/rfcs/blob/master/text/0534-deriving2derive.md
3855 [self]: https://github.com/rust-lang/rfcs/blob/master/text/0532-self-in-use.md
3856 [fb]: https://github.com/rust-lang/rfcs/blob/master/text/0212-restore-int-fallback.md
3857 [objsafe]: https://github.com/rust-lang/rfcs/blob/master/text/0255-object-safety.md
3858 [assoc]: https://github.com/rust-lang/rfcs/blob/master/text/0195-associated-items.md
3859 [ints]: https://github.com/rust-lang/rfcs/pull/544#issuecomment-68760871
3860 [trpl]: https://doc.rust-lang.org/book/index.html
3861 [rbe]: http://rustbyexample.com/
3864 Version 0.12.0 (2014-10-09)
3865 =============================
3867 * ~1900 changes, numerous bugfixes
3871 * The introductory documentation (now called The Rust Guide) has
3872 been completely rewritten, as have a number of supplementary
3874 * Rust's package manager, Cargo, continues to improve and is
3875 sometimes considered to be quite awesome.
3876 * Many API's in `std` have been reviewed and updated for
3877 consistency with the in-development Rust coding
3878 guidelines. The standard library documentation tracks
3879 stabilization progress.
3880 * Minor libraries have been moved out-of-tree to the rust-lang org
3881 on GitHub: uuid, semver, glob, num, hexfloat, fourcc. They can
3882 be installed with Cargo.
3883 * Lifetime elision allows lifetime annotations to be left off of
3884 function declarations in many common scenarios.
3885 * Rust now works on 64-bit Windows.
3888 * Indexing can be overloaded with the `Index` and `IndexMut`
3890 * The `if let` construct takes a branch only if the `let` pattern
3891 matches, currently behind the 'if_let' feature gate.
3892 * 'where clauses', a more flexible syntax for specifying trait
3893 bounds that is more aesthetic, have been added for traits and
3894 free functions. Where clauses will in the future make it
3895 possible to constrain associated types, which would be
3896 impossible with the existing syntax.
3897 * A new slicing syntax (e.g. `[0..4]`) has been introduced behind
3898 the 'slicing_syntax' feature gate, and can be overloaded with
3899 the `Slice` or `SliceMut` traits.
3900 * The syntax for matching of sub-slices has been changed to use a
3901 postfix `..` instead of prefix (.e.g. `[a, b, c..]`), for
3902 consistency with other uses of `..` and to future-proof
3903 potential additional uses of the syntax.
3904 * The syntax for matching inclusive ranges in patterns has changed
3905 from `0..3` to `0...4` to be consistent with the exclusive range
3907 * Matching of sub-slices in non-tail positions (e.g. `[a.., b,
3908 c]`) has been put behind the 'advanced_slice_patterns' feature
3909 gate and may be removed in the future.
3910 * Components of tuples and tuple structs can be extracted using
3911 the `value.0` syntax, currently behind the `tuple_indexing`
3913 * The `#[crate_id]` attribute is no longer supported; versioning
3914 is handled by the package manager.
3915 * Renaming crate imports are now written `extern crate foo as bar`
3916 instead of `extern crate bar = foo`.
3917 * Renaming use statements are now written `use foo as bar` instead
3919 * `let` and `match` bindings and argument names in macros are now
3921 * The new, more efficient, closure types ('unboxed closures') have
3922 been added under a feature gate, 'unboxed_closures'. These will
3923 soon replace the existing closure types, once higher-ranked
3924 trait lifetimes are added to the language.
3925 * `move` has been added as a keyword, for indicating closures
3926 that capture by value.
3927 * Mutation and assignment is no longer allowed in pattern guards.
3928 * Generic structs and enums can now have trait bounds.
3929 * The `Share` trait is now called `Sync` to free up the term
3930 'shared' to refer to 'shared reference' (the default reference
3932 * Dynamically-sized types have been mostly implemented,
3933 unifying the behavior of fat-pointer types with the rest of the
3935 * As part of dynamically-sized types, the `Sized` trait has been
3936 introduced, which qualifying types implement by default, and
3937 which type parameters expect by default. To specify that a type
3938 parameter does not need to be sized, write `<Sized? T>`. Most
3939 types are `Sized`, notable exceptions being unsized arrays
3940 (`[T]`) and trait types.
3941 * Closures can return `!`, as in `|| -> !` or `proc() -> !`.
3942 * Lifetime bounds can now be applied to type parameters and object
3944 * The old, reference counted GC type, `Gc<T>` which was once
3945 denoted by the `@` sigil, has finally been removed. GC will be
3946 revisited in the future.
3949 * Library documentation has been improved for a number of modules.
3950 * Bit-vectors, collections::bitv has been modernized.
3951 * The url crate is deprecated in favor of
3952 http://github.com/servo/rust-url, which can be installed with
3954 * Most I/O stream types can be cloned and subsequently closed from
3956 * A `std::time::Duration` type has been added for use in I/O
3957 methods that rely on timers, as well as in the 'time' crate's
3958 `Timespec` arithmetic.
3959 * The runtime I/O abstraction layer that enabled the green thread
3960 scheduler to do non-thread-blocking I/O has been removed, along
3961 with the libuv-based implementation employed by the green thread
3962 scheduler. This will greatly simplify the future I/O work.
3963 * `collections::btree` has been rewritten to have a more
3964 idiomatic and efficient design.
3967 * rustdoc output now indicates the stability levels of API's.
3968 * The `--crate-name` flag can specify the name of the crate
3969 being compiled, like `#[crate_name]`.
3970 * The `-C metadata` specifies additional metadata to hash into
3971 symbol names, and `-C extra-filename` specifies additional
3972 information to put into the output filename, for use by the
3973 package manager for versioning.
3974 * debug info generation has continued to improve and should be
3975 more reliable under both gdb and lldb.
3976 * rustc has experimental support for compiling in parallel
3977 using the `-C codegen-units` flag.
3978 * rustc no longer encodes rpath information into binaries by
3982 * Stack usage has been optimized with LLVM lifetime annotations.
3983 * Official Rust binaries on Linux are more compatible with older
3984 kernels and distributions, built on CentOS 5.10.
3987 Version 0.11.0 (2014-07-02)
3988 ==========================
3990 * ~1700 changes, numerous bugfixes
3993 * ~[T] has been removed from the language. This type is superseded by
3995 * ~str has been removed from the language. This type is superseded by
3997 * ~T has been removed from the language. This type is superseded by the
3999 * @T has been removed from the language. This type is superseded by the
4000 standard library's std::gc::Gc<T> type.
4001 * Struct fields are now all private by default.
4002 * Vector indices and shift amounts are both required to be a `uint`
4003 instead of any integral type.
4004 * Byte character, byte string, and raw byte string literals are now all
4005 supported by prefixing the normal literal with a `b`.
4006 * Multiple ABIs are no longer allowed in an ABI string
4007 * The syntax for lifetimes on closures/procedures has been tweaked
4008 slightly: `<'a>|A, B|: 'b + K -> T`
4009 * Floating point modulus has been removed from the language; however it
4010 is still provided by a library implementation.
4011 * Private enum variants are now disallowed.
4012 * The `priv` keyword has been removed from the language.
4013 * A closure can no longer be invoked through a &-pointer.
4014 * The `use foo, bar, baz;` syntax has been removed from the language.
4015 * The transmute intrinsic no longer works on type parameters.
4016 * Statics now allow blocks/items in their definition.
4017 * Trait bounds are separated from objects with + instead of : now.
4018 * Objects can no longer be read while they are mutably borrowed.
4019 * The address of a static is now marked as insignificant unless the
4020 #[inline(never)] attribute is placed it.
4021 * The #[unsafe_destructor] attribute is now behind a feature gate.
4022 * Struct literals are no longer allowed in ambiguous positions such as
4023 if, while, match, and for..in.
4024 * Declaration of lang items and intrinsics are now feature-gated by
4026 * Integral literals no longer default to `int`, and floating point
4027 literals no longer default to `f64`. Literals must be suffixed with an
4028 appropriate type if inference cannot determine the type of the
4030 * The Box<T> type is no longer implicitly borrowed to &mut T.
4031 * Procedures are now required to not capture borrowed references.
4034 * The standard library is now a "facade" over a number of underlying
4035 libraries. This means that development on the standard library should
4036 be speeder due to smaller crates, as well as a clearer line between
4038 * A new library, libcore, lives under the standard library's facade
4039 which is Rust's "0-assumption" library, suitable for embedded and
4040 kernel development for example.
4041 * A regex crate has been added to the standard distribution. This crate
4042 includes statically compiled regular expressions.
4043 * The unwrap/unwrap_err methods on Result require a Show bound for
4044 better error messages.
4045 * The return types of the std::comm primitives have been centralized
4046 around the Result type.
4047 * A number of I/O primitives have gained the ability to time out their
4049 * A number of I/O primitives have gained the ability to close their
4050 reading/writing halves to cancel pending operations.
4051 * Reverse iterator methods have been removed in favor of `rev()` on
4052 their forward-iteration counterparts.
4053 * A bitflags! macro has been added to enable easy interop with C and
4054 management of bit flags.
4055 * A debug_assert! macro is now provided which is disabled when
4056 `--cfg ndebug` is passed to the compiler.
4057 * A graphviz crate has been added for creating .dot files.
4058 * The std::cast module has been migrated into std::mem.
4059 * The std::local_data api has been migrated from freestanding functions
4060 to being based on methods.
4061 * The Pod trait has been renamed to Copy.
4062 * jemalloc has been added as the default allocator for types.
4063 * The API for allocating memory has been changed to use proper alignment
4064 and sized deallocation
4065 * Connecting a TcpStream or binding a TcpListener is now based on a
4066 string address and a u16 port. This allows connecting to a hostname as
4068 * The Reader trait now contains a core method, read_at_least(), which
4069 correctly handles many repeated 0-length reads.
4070 * The process-spawning API is now centered around a builder-style
4072 * The :? printing qualifier has been moved from the standard library to
4073 an external libdebug crate.
4074 * Eq/Ord have been renamed to PartialEq/PartialOrd. TotalEq/TotalOrd
4075 have been renamed to Eq/Ord.
4076 * The select/plural methods have been removed from format!. The escapes
4077 for { and } have also changed from \{ and \} to {{ and }},
4079 * The TaskBuilder API has been re-worked to be a true builder, and
4080 extension traits for spawning native/green tasks have been added.
4083 * All breaking changes to the language or libraries now have their
4084 commit message annotated with `[breaking-change]` to allow for easy
4085 discovery of breaking changes.
4086 * The compiler will now try to suggest how to annotate lifetimes if a
4087 lifetime-related error occurs.
4088 * Debug info continues to be improved greatly with general bug fixes and
4089 better support for situations like link time optimization (LTO).
4090 * Usage of syntax extensions when cross-compiling has been fixed.
4091 * Functionality equivalent to GCC & Clang's -ffunction-sections,
4092 -fdata-sections and --gc-sections has been enabled by default
4093 * The compiler is now stricter about where it will load module files
4094 from when a module is declared via `mod foo;`.
4095 * The #[phase(syntax)] attribute has been renamed to #[phase(plugin)].
4096 Syntax extensions are now discovered via a "plugin registrar" type
4097 which will be extended in the future to other various plugins.
4098 * Lints have been restructured to allow for dynamically loadable lints.
4099 * A number of rustdoc improvements:
4100 * The HTML output has been visually redesigned.
4101 * Markdown is now powered by hoedown instead of sundown.
4102 * Searching heuristics have been greatly improved.
4103 * The search index has been reduced in size by a great amount.
4104 * Cross-crate documentation via `pub use` has been greatly improved.
4105 * Primitive types are now hyperlinked and documented.
4106 * Documentation has been moved from static.rust-lang.org/doc to
4108 * A new sandbox, play.rust-lang.org, is available for running and
4109 sharing rust code examples on-line.
4110 * Unused attributes are now more robustly warned about.
4111 * The dead_code lint now warns about unused struct fields.
4112 * Cross-compiling to iOS is now supported.
4113 * Cross-compiling to mipsel is now supported.
4114 * Stability attributes are now inherited by default and no longer apply
4115 to intra-crate usage, only inter-crate usage.
4116 * Error message related to non-exhaustive match expressions have been
4120 Version 0.10 (2014-04-03)
4121 =========================
4123 * ~1500 changes, numerous bugfixes
4126 * A new RFC process is now in place for modifying the language.
4127 * Patterns with `@`-pointers have been removed from the language.
4128 * Patterns with unique vectors (`~[T]`) have been removed from the
4130 * Patterns with unique strings (`~str`) have been removed from the
4132 * `@str` has been removed from the language.
4133 * `@[T]` has been removed from the language.
4134 * `@self` has been removed from the language.
4135 * `@Trait` has been removed from the language.
4136 * Headers on `~` allocations which contain `@` boxes inside the type for
4137 reference counting have been removed.
4138 * The semantics around the lifetimes of temporary expressions have changed,
4139 see #3511 and #11585 for more information.
4140 * Cross-crate syntax extensions are now possible, but feature gated. See
4141 #11151 for more information. This includes both `macro_rules!` macros as
4142 well as syntax extensions such as `format!`.
4143 * New lint modes have been added, and older ones have been turned on to be
4145 * Unnecessary parentheses
4148 * Uppercase variables
4149 * Publicly visible private types
4150 * `#[deriving]` with raw pointers
4151 * Unsafe functions can no longer be coerced to closures.
4152 * Various obscure macros such as `log_syntax!` are now behind feature gates.
4153 * The `#[simd]` attribute is now behind a feature gate.
4154 * Visibility is no longer allowed on `extern crate` statements, and
4155 unnecessary visibility (`priv`) is no longer allowed on `use` statements.
4156 * Trailing commas are now allowed in argument lists and tuple patterns.
4157 * The `do` keyword has been removed, it is now a reserved keyword.
4158 * Default type parameters have been implemented, but are feature gated.
4159 * Borrowed variables through captures in closures are now considered soundly.
4160 * `extern mod` is now `extern crate`
4161 * The `Freeze` trait has been removed.
4162 * The `Share` trait has been added for types that can be shared among
4164 * Labels in macros are now hygienic.
4165 * Expression/statement macro invocations can be delimited with `{}` now.
4166 * Treatment of types allowed in `static mut` locations has been tweaked.
4167 * The `*` and `.` operators are now overloadable through the `Deref` and
4169 * `~Trait` and `proc` no longer have `Send` bounds by default.
4170 * Partial type hints are now supported with the `_` type marker.
4171 * An `Unsafe` type was introduced for interior mutability. It is now
4172 considered undefined to transmute from `&T` to `&mut T` without using the
4174 * The #[linkage] attribute was implemented for extern statics/functions.
4175 * The inner attribute syntax has changed from `#[foo];` to `#![foo]`.
4176 * `Pod` was renamed to `Copy`.
4179 * The `libextra` library has been removed. It has now been decomposed into
4180 component libraries with smaller and more focused nuggets of
4181 functionality. The full list of libraries can be found on the
4182 documentation index page.
4183 * std: `std::condition` has been removed. All I/O errors are now propagated
4184 through the `Result` type. In order to assist with error handling, a
4185 `try!` macro for unwrapping errors with an early return and a lint for
4186 unused results has been added. See #12039 for more information.
4187 * std: The `vec` module has been renamed to `slice`.
4188 * std: A new vector type, `Vec<T>`, has been added in preparation for DST.
4189 This will become the only growable vector in the future.
4190 * std: `std::io` now has more public-reexports. Types such as `BufferedReader`
4191 are now found at `std::io::BufferedReader` instead of
4192 `std::io::buffered::BufferedReader`.
4193 * std: `print` and `println` are no longer in the prelude, the `print!` and
4194 `println!` macros are intended to be used instead.
4195 * std: `Rc` now has a `Weak` pointer for breaking cycles, and it no longer
4196 attempts to statically prevent cycles.
4197 * std: The standard distribution is adopting the policy of pushing failure
4198 to the user rather than failing in libraries. Many functions (such as
4199 `slice::last()`) now return `Option<T>` instead of `T` + failing.
4200 * std: `fmt::Default` has been renamed to `fmt::Show`, and it now has a new
4201 deriving mode: `#[deriving(Show)]`.
4202 * std: `ToStr` is now implemented for all types implementing `Show`.
4203 * std: The formatting trait methods now take `&self` instead of `&T`
4204 * std: The `invert()` method on iterators has been renamed to `rev()`
4205 * std: `std::num` has seen a reduction in the genericity of its traits,
4206 consolidating functionality into a few core traits.
4207 * std: Backtraces are now printed on task failure if the environment
4208 variable `RUST_BACKTRACE` is present.
4209 * std: Naming conventions for iterators have been standardized. More details
4210 can be found on the wiki's style guide.
4211 * std: `eof()` has been removed from the `Reader` trait. Specific types may
4212 still implement the function.
4213 * std: Networking types are now cloneable to allow simultaneous reads/writes.
4214 * std: `assert_approx_eq!` has been removed
4215 * std: The `e` and `E` formatting specifiers for floats have been added to
4216 print them in exponential notation.
4217 * std: The `Times` trait has been removed
4218 * std: Indications of variance and opting out of builtin bounds is done
4219 through marker types in `std::kinds::marker` now
4220 * std: `hash` has been rewritten, `IterBytes` has been removed, and
4221 `#[deriving(Hash)]` is now possible.
4222 * std: `SharedChan` has been removed, `Sender` is now cloneable.
4223 * std: `Chan` and `Port` were renamed to `Sender` and `Receiver`.
4224 * std: `Chan::new` is now `channel()`.
4225 * std: A new synchronous channel type has been implemented.
4226 * std: A `select!` macro is now provided for selecting over `Receiver`s.
4227 * std: `hashmap` and `trie` have been moved to `libcollections`
4228 * std: `run` has been rolled into `io::process`
4229 * std: `assert_eq!` now uses `{}` instead of `{:?}`
4230 * std: The equality and comparison traits have seen some reorganization.
4231 * std: `rand` has moved to `librand`.
4232 * std: `to_{lower,upper}case` has been implemented for `char`.
4233 * std: Logging has been moved to `liblog`.
4234 * collections: `HashMap` has been rewritten for higher performance and less
4236 * native: The default runtime is now `libnative`. If `libgreen` is desired,
4237 it can be booted manually. The runtime guide has more information and
4239 * native: All I/O functionality except signals has been implemented.
4240 * green: Task spawning with `libgreen` has been optimized with stack caching
4241 and various trimming of code.
4242 * green: Tasks spawned by `libgreen` now have an unmapped guard page.
4243 * sync: The `extra::sync` module has been updated to modern rust (and moved
4244 to the `sync` library), tweaking and improving various interfaces while
4245 dropping redundant functionality.
4246 * sync: A new `Barrier` type has been added to the `sync` library.
4247 * sync: An efficient mutex for native and green tasks has been implemented.
4248 * serialize: The `base64` module has seen some improvement. It treats
4249 newlines better, has non-string error values, and has seen general
4251 * fourcc: A `fourcc!` macro was introduced
4252 * hexfloat: A `hexfloat!` macro was implemented for specifying floats via a
4253 hexadecimal literal.
4256 * `rustpkg` has been deprecated and removed from the main repository. Its
4257 replacement, `cargo`, is under development.
4258 * Nightly builds of rust are now available
4259 * The memory usage of rustc has been improved many times throughout this
4261 * The build process supports disabling rpath support for the rustc binary
4263 * Code generation has improved in some cases, giving more information to the
4264 LLVM optimization passes to enable more extensive optimizations.
4265 * Debuginfo compatibility with lldb on OSX has been restored.
4266 * The master branch is now gated on an android bot, making building for
4267 android much more reliable.
4268 * Output flags have been centralized into one `--emit` flag.
4269 * Crate type flags have been centralized into one `--crate-type` flag.
4270 * Codegen flags have been consolidated behind a `-C` flag.
4271 * Linking against outdated crates now has improved error messages.
4272 * Error messages with lifetimes will often suggest how to annotate the
4273 function to fix the error.
4274 * Many more types are documented in the standard library, and new guides
4276 * Many `rustdoc` improvements:
4277 * code blocks are syntax highlighted.
4278 * render standalone markdown files.
4279 * the --test flag tests all code blocks by default.
4280 * exported macros are displayed.
4281 * reexported types have their documentation inlined at the location of the
4283 * search works across crates that have been rendered to the same output
4287 Version 0.9 (2014-01-09)
4288 ==========================
4290 * ~1800 changes, numerous bugfixes
4293 * The `float` type has been removed. Use `f32` or `f64` instead.
4294 * A new facility for enabling experimental features (feature gating) has
4295 been added, using the crate-level `#[feature(foo)]` attribute.
4296 * Managed boxes (@) are now behind a feature gate
4297 (`#[feature(managed_boxes)]`) in preparation for future removal. Use the
4298 standard library's `Gc` or `Rc` types instead.
4299 * `@mut` has been removed. Use `std::cell::{Cell, RefCell}` instead.
4300 * Jumping back to the top of a loop is now done with `continue` instead of
4302 * Strings can no longer be mutated through index assignment.
4303 * Raw strings can be created via the basic `r"foo"` syntax or with matched
4304 hash delimiters, as in `r###"foo"###`.
4305 * `~fn` is now written `proc (args) -> retval { ... }` and may only be
4307 * The `&fn` type is now written `|args| -> ret` to match the literal form.
4308 * `@fn`s have been removed.
4309 * `do` only works with procs in order to make it obvious what the cost
4311 * Single-element tuple-like structs can no longer be dereferenced to
4312 obtain the inner value. A more comprehensive solution for overloading
4313 the dereference operator will be provided in the future.
4314 * The `#[link(...)]` attribute has been replaced with
4315 `#[crate_id = "name#vers"]`.
4316 * Empty `impl`s must be terminated with empty braces and may not be
4317 terminated with a semicolon.
4318 * Keywords are no longer allowed as lifetime names; the `self` lifetime
4319 no longer has any special meaning.
4320 * The old `fmt!` string formatting macro has been removed.
4321 * `printf!` and `printfln!` (old-style formatting) removed in favor of
4322 `print!` and `println!`.
4323 * `mut` works in patterns now, as in `let (mut x, y) = (1, 2);`.
4324 * The `extern mod foo (name = "bar")` syntax has been removed. Use
4325 `extern mod foo = "bar"` instead.
4326 * New reserved keywords: `alignof`, `offsetof`, `sizeof`.
4327 * Macros can have attributes.
4328 * Macros can expand to items with attributes.
4329 * Macros can expand to multiple items.
4330 * The `asm!` macro is feature-gated (`#[feature(asm)]`).
4331 * Comments may be nested.
4332 * Values automatically coerce to trait objects they implement, without
4334 * Enum discriminants are no longer an entire word but as small as needed to
4335 contain all the variants. The `repr` attribute can be used to override
4336 the discriminant size, as in `#[repr(int)]` for integer-sized, and
4337 `#[repr(C)]` to match C enums.
4338 * Non-string literals are not allowed in attributes (they never worked).
4339 * The FFI now supports variadic functions.
4340 * Octal numeric literals, as in `0o7777`.
4341 * The `concat!` syntax extension performs compile-time string concatenation.
4342 * The `#[fixed_stack_segment]` and `#[rust_stack]` attributes have been
4343 removed as Rust no longer uses segmented stacks.
4344 * Non-ascii identifiers are feature-gated (`#[feature(non_ascii_idents)]`).
4345 * Ignoring all fields of an enum variant or tuple-struct is done with `..`,
4346 not `*`; ignoring remaining fields of a struct is also done with `..`,
4347 not `_`; ignoring a slice of a vector is done with `..`, not `.._`.
4348 * `rustc` supports the "win64" calling convention via `extern "win64"`.
4349 * `rustc` supports the "system" calling convention, which defaults to the
4350 preferred convention for the target platform, "stdcall" on 32-bit Windows,
4352 * The `type_overflow` lint (default: warn) checks literals for overflow.
4353 * The `unsafe_block` lint (default: allow) checks for usage of `unsafe`.
4354 * The `attribute_usage` lint (default: warn) warns about unknown
4356 * The `unknown_features` lint (default: warn) warns about unknown
4358 * The `dead_code` lint (default: warn) checks for dead code.
4359 * Rust libraries can be linked statically to one another
4360 * `#[link_args]` is behind the `link_args` feature gate.
4361 * Native libraries are now linked with `#[link(name = "foo")]`
4362 * Native libraries can be statically linked to a rust crate
4363 (`#[link(name = "foo", kind = "static")]`).
4364 * Native OS X frameworks are now officially supported
4365 (`#[link(name = "foo", kind = "framework")]`).
4366 * The `#[thread_local]` attribute creates thread-local (not task-local)
4367 variables. Currently behind the `thread_local` feature gate.
4368 * The `return` keyword may be used in closures.
4369 * Types that can be copied via a memcpy implement the `Pod` kind.
4370 * The `cfg` attribute can now be used on struct fields and enum variants.
4373 * std: The `option` and `result` API's have been overhauled to make them
4374 simpler, more consistent, and more composable.
4375 * std: The entire `std::io` module has been replaced with one that is
4376 more comprehensive and that properly interfaces with the underlying
4377 scheduler. File, TCP, UDP, Unix sockets, pipes, and timers are all
4379 * std: `io::util` contains a number of useful implementations of
4380 `Reader` and `Writer`, including `NullReader`, `NullWriter`,
4381 `ZeroReader`, `TeeReader`.
4382 * std: The reference counted pointer type `extra::rc` moved into std.
4383 * std: The `Gc` type in the `gc` module will replace `@` (it is currently
4384 just a wrapper around it).
4385 * std: The `Either` type has been removed.
4386 * std: `fmt::Default` can be implemented for any type to provide default
4387 formatting to the `format!` macro, as in `format!("{}", myfoo)`.
4388 * std: The `rand` API continues to be tweaked.
4389 * std: The `rust_begin_unwind` function, useful for inserting breakpoints
4390 on failure in gdb, is now named `rust_fail`.
4391 * std: The `each_key` and `each_value` methods on `HashMap` have been
4392 replaced by the `keys` and `values` iterators.
4393 * std: Functions dealing with type size and alignment have moved from the
4394 `sys` module to the `mem` module.
4395 * std: The `path` module was written and API changed.
4396 * std: `str::from_utf8` has been changed to cast instead of allocate.
4397 * std: `starts_with` and `ends_with` methods added to vectors via the
4398 `ImmutableEqVector` trait, which is in the prelude.
4399 * std: Vectors can be indexed with the `get_opt` method, which returns `None`
4400 if the index is out of bounds.
4401 * std: Task failure no longer propagates between tasks, as the model was
4402 complex, expensive, and incompatible with thread-based tasks.
4403 * std: The `Any` type can be used for dynamic typing.
4404 * std: `~Any` can be passed to the `fail!` macro and retrieved via
4406 * std: Methods that produce iterators generally do not have an `_iter`
4408 * std: `cell::Cell` and `cell::RefCell` can be used to introduce mutability
4409 roots (mutable fields, etc.). Use instead of e.g. `@mut`.
4410 * std: `util::ignore` renamed to `prelude::drop`.
4411 * std: Slices have `sort` and `sort_by` methods via the `MutableVector`
4413 * std: `vec::raw` has seen a lot of cleanup and API changes.
4414 * std: The standard library no longer includes any C++ code, and very
4415 minimal C, eliminating the dependency on libstdc++.
4416 * std: Runtime scheduling and I/O functionality has been factored out into
4417 extensible interfaces and is now implemented by two different crates:
4418 libnative, for native threading and I/O; and libgreen, for green threading
4419 and I/O. This paves the way for using the standard library in more limited
4420 embedded environments.
4421 * std: The `comm` module has been rewritten to be much faster, have a
4422 simpler, more consistent API, and to work for both native and green
4424 * std: All libuv dependencies have been moved into the rustuv crate.
4425 * native: New implementations of runtime scheduling on top of OS threads.
4426 * native: New native implementations of TCP, UDP, file I/O, process spawning,
4428 * green: The green thread scheduler and message passing types are almost
4430 * extra: The `flatpipes` module had bitrotted and was removed.
4431 * extra: All crypto functions have been removed and Rust now has a policy of
4432 not reimplementing crypto in the standard library. In the future crypto
4433 will be provided by external crates with bindings to established libraries.
4434 * extra: `c_vec` has been modernized.
4435 * extra: The `sort` module has been removed. Use the `sort` method on
4439 * The `rust` and `rusti` commands have been removed, due to lack of
4441 * `rustdoc` was completely rewritten.
4442 * `rustdoc` can test code examples in documentation.
4443 * `rustpkg` can test packages with the argument, 'test'.
4444 * `rustpkg` supports arbitrary dependencies, including C libraries.
4445 * `rustc`'s support for generating debug info is improved again.
4446 * `rustc` has better error reporting for unbalanced delimiters.
4447 * `rustc`'s JIT support was removed due to bitrot.
4448 * Executables and static libraries can be built with LTO (-Z lto)
4449 * `rustc` adds a `--dep-info` flag for communicating dependencies to
4453 Version 0.8 (2013-09-26)
4454 ============================
4456 * ~2200 changes, numerous bugfixes
4459 * The `for` loop syntax has changed to work with the `Iterator` trait.
4460 * At long last, unwinding works on Windows.
4461 * Default methods are ready for use.
4462 * Many trait inheritance bugs fixed.
4463 * Owned and borrowed trait objects work more reliably.
4464 * `copy` is no longer a keyword. It has been replaced by the `Clone` trait.
4465 * rustc can omit emission of code for the `debug!` macro if it is passed
4467 * mod.rs is now "blessed". When loading `mod foo;`, rustc will now look
4468 for foo.rs, then foo/mod.rs, and will generate an error when both are
4470 * Strings no longer contain trailing nulls. The new `std::c_str` module
4471 provides new mechanisms for converting to C strings.
4472 * The type of foreign functions is now `extern "C" fn` instead of `*u8'.
4473 * The FFI has been overhauled such that foreign functions are called directly,
4474 instead of through a stack-switching wrapper.
4475 * Calling a foreign function must be done through a Rust function with the
4476 `#[fixed_stack_segment]` attribute.
4477 * The `externfn!` macro can be used to declare both a foreign function and
4478 a `#[fixed_stack_segment]` wrapper at once.
4479 * `pub` and `priv` modifiers on `extern` blocks are no longer parsed.
4480 * `unsafe` is no longer allowed on extern fns - they are all unsafe.
4481 * `priv` is disallowed everywhere except for struct fields and enum variants.
4482 * `&T` (besides `&'static T`) is no longer allowed in `@T`.
4483 * `ref` bindings in irrefutable patterns work correctly now.
4484 * `char` is now prevented from containing invalid code points.
4485 * Casting to `bool` is no longer allowed.
4486 * `\0` is now accepted as an escape in chars and strings.
4487 * `yield` is a reserved keyword.
4488 * `typeof` is a reserved keyword.
4489 * Crates may be imported by URL with `extern mod foo = "url";`.
4490 * Explicit enum discriminants may be given as uints as in `enum E { V = 0u }`
4491 * Static vectors can be initialized with repeating elements,
4492 e.g. `static foo: [u8, .. 100]: [0, .. 100];`.
4493 * Static structs can be initialized with functional record update,
4494 e.g. `static foo: Foo = Foo { a: 5, .. bar };`.
4495 * `cfg!` can be used to conditionally execute code based on the crate
4496 configuration, similarly to `#[cfg(...)]`.
4497 * The `unnecessary_qualification` lint detects unneeded module
4498 prefixes (default: allow).
4499 * Arithmetic operations have been implemented on the SIMD types in
4500 `std::unstable::simd`.
4501 * Exchange allocation headers were removed, reducing memory usage.
4502 * `format!` implements a completely new, extensible, and higher-performance
4503 string formatting system. It will replace `fmt!`.
4504 * `print!` and `println!` write formatted strings (using the `format!`
4505 extension) to stdout.
4506 * `write!` and `writeln!` write formatted strings (using the `format!`
4507 extension) to the new Writers in `std::rt::io`.
4508 * The library section in which a function or static is placed may
4509 be specified with `#[link_section = "..."]`.
4510 * The `proto!` syntax extension for defining bounded message protocols
4512 * `macro_rules!` is hygienic for `let` declarations.
4513 * The `#[export_name]` attribute specifies the name of a symbol.
4514 * `unreachable!` can be used to indicate unreachable code, and fails
4518 * std: Transitioned to the new runtime, written in Rust.
4519 * std: Added an experimental I/O library, `rt::io`, based on the new
4521 * std: A new generic `range` function was added to the prelude, replacing
4522 `uint::range` and friends.
4523 * std: `range_rev` no longer exists. Since range is an iterator it can be
4524 reversed with `range(lo, hi).invert()`.
4525 * std: The `chain` method on option renamed to `and_then`; `unwrap_or_default`
4526 renamed to `unwrap_or`.
4527 * std: The `iterator` module was renamed to `iter`.
4528 * std: Integral types now support the `checked_add`, `checked_sub`, and
4529 `checked_mul` operations for detecting overflow.
4530 * std: Many methods in `str`, `vec`, `option, `result` were renamed for
4532 * std: Methods are standardizing on conventions for casting methods:
4533 `to_foo` for copying, `into_foo` for moving, `as_foo` for temporary
4535 * std: The `CString` type in `c_str` provides new ways to convert to and
4537 * std: `DoubleEndedIterator` can yield elements in two directions.
4538 * std: The `mut_split` method on vectors partitions an `&mut [T]` into
4540 * std: `str::from_bytes` renamed to `str::from_utf8`.
4541 * std: `pop_opt` and `shift_opt` methods added to vectors.
4542 * std: The task-local data interface no longer uses @, and keys are
4543 no longer function pointers.
4544 * std: The `swap_unwrap` method of `Option` renamed to `take_unwrap`.
4545 * std: Added `SharedPort` to `comm`.
4546 * std: `Eq` has a default method for `ne`; only `eq` is required
4548 * std: `Ord` has default methods for `le`, `gt` and `ge`; only `lt`
4549 is required in implementations.
4550 * std: `is_utf8` performance is improved, impacting many string functions.
4551 * std: `os::MemoryMap` provides cross-platform mmap.
4552 * std: `ptr::offset` is now unsafe, but also more optimized. Offsets that
4553 are not 'in-bounds' are considered undefined.
4554 * std: Many freestanding functions in `vec` removed in favor of methods.
4555 * std: Many freestanding functions on scalar types removed in favor of
4557 * std: Many options to task builders were removed since they don't make
4558 sense in the new scheduler design.
4559 * std: More containers implement `FromIterator` so can be created by the
4561 * std: More complete atomic types in `unstable::atomics`.
4562 * std: `comm::PortSet` removed.
4563 * std: Mutating methods in the `Set` and `Map` traits have been moved into
4564 the `MutableSet` and `MutableMap` traits. `Container::is_empty`,
4565 `Map::contains_key`, `MutableMap::insert`, and `MutableMap::remove` have
4566 default implementations.
4567 * std: Various `from_str` functions were removed in favor of a generic
4568 `from_str` which is available in the prelude.
4569 * std: `util::unreachable` removed in favor of the `unreachable!` macro.
4570 * extra: `dlist`, the doubly-linked list was modernized.
4571 * extra: Added a `hex` module with `ToHex` and `FromHex` traits.
4572 * extra: Added `glob` module, replacing `std::os::glob`.
4573 * extra: `rope` was removed.
4574 * extra: `deque` was renamed to `ringbuf`. `RingBuf` implements `Deque`.
4575 * extra: `net`, and `timer` were removed. The experimental replacements
4576 are `std::rt::io::net` and `std::rt::io::timer`.
4577 * extra: Iterators implemented for `SmallIntMap`.
4578 * extra: Iterators implemented for `Bitv` and `BitvSet`.
4579 * extra: `SmallIntSet` removed. Use `BitvSet`.
4580 * extra: Performance of JSON parsing greatly improved.
4581 * extra: `semver` updated to SemVer 2.0.0.
4582 * extra: `term` handles more terminals correctly.
4583 * extra: `dbg` module removed.
4584 * extra: `par` module removed.
4585 * extra: `future` was cleaned up, with some method renames.
4586 * extra: Most free functions in `getopts` were converted to methods.
4589 * rustc's debug info generation (`-Z debug-info`) is greatly improved.
4590 * rustc accepts `--target-cpu` to compile to a specific CPU architecture,
4591 similarly to gcc's `--march` flag.
4592 * rustc's performance compiling small crates is much better.
4593 * rustpkg has received many improvements.
4594 * rustpkg supports git tags as package IDs.
4595 * rustpkg builds into target-specific directories so it can be used for
4597 * The number of concurrent test tasks is controlled by the environment
4598 variable RUST_TEST_TASKS.
4599 * The test harness can now report metrics for benchmarks.
4600 * All tools have man pages.
4601 * Programs compiled with `--test` now support the `-h` and `--help` flags.
4602 * The runtime uses jemalloc for allocations.
4603 * Segmented stacks are temporarily disabled as part of the transition to
4604 the new runtime. Stack overflows are possible!
4605 * A new documentation backend, rustdoc_ng, is available for use. It is
4606 still invoked through the normal `rustdoc` command.
4609 Version 0.7 (2013-07-03)
4610 =======================
4612 * ~2000 changes, numerous bugfixes
4615 * `impl`s no longer accept a visibility qualifier. Put them on methods
4617 * The borrow checker has been rewritten with flow-sensitivity, fixing
4618 many bugs and inconveniences.
4619 * The `self` parameter no longer implicitly means `&'self self`,
4620 and can be explicitly marked with a lifetime.
4621 * Overloadable compound operators (`+=`, etc.) have been temporarily
4622 removed due to bugs.
4623 * The `for` loop protocol now requires `for`-iterators to return `bool`
4624 so they compose better.
4625 * The `Durable` trait is replaced with the `'static` bounds.
4626 * Trait default methods work more often.
4627 * Structs with the `#[packed]` attribute have byte alignment and
4628 no padding between fields.
4629 * Type parameters bound by `Copy` must now be copied explicitly with
4631 * It is now illegal to move out of a dereferenced unsafe pointer.
4632 * `Option<~T>` is now represented as a nullable pointer.
4633 * `@mut` does dynamic borrow checks correctly.
4634 * The `main` function is only detected at the topmost level of the crate.
4635 The `#[main]` attribute is still valid anywhere.
4636 * Struct fields may no longer be mutable. Use inherited mutability.
4637 * The `#[no_send]` attribute makes a type that would otherwise be
4639 * The `#[no_freeze]` attribute makes a type that would otherwise be
4641 * Unbounded recursion will abort the process after reaching the limit
4642 specified by the `RUST_MAX_STACK` environment variable (default: 1GB).
4643 * The `vecs_implicitly_copyable` lint mode has been removed. Vectors
4644 are never implicitly copyable.
4645 * `#[static_assert]` makes compile-time assertions about static bools.
4646 * At long last, 'argument modes' no longer exist.
4647 * The rarely used `use mod` statement no longer exists.
4650 * `fail!` and `assert!` accept `~str`, `&'static str` or `fmt!`-style
4652 * `Encodable`, `Decodable`, `Ord`, `TotalOrd`, `TotalEq`, `DeepClone`,
4653 `Rand`, `Zero` and `ToStr` can all be automatically derived with
4655 * The `bytes!` macro returns a vector of bytes for string, u8, char,
4656 and unsuffixed integer literals.
4659 * The `core` crate was renamed to `std`.
4660 * The `std` crate was renamed to `extra`.
4661 * More and improved documentation.
4662 * std: `iterator` module for external iterator objects.
4663 * Many old-style (internal, higher-order function) iterators replaced by
4664 implementations of `Iterator`.
4665 * std: Many old internal vector and string iterators,
4666 incl. `any`, `all`. removed.
4667 * std: The `finalize` method of `Drop` renamed to `drop`.
4668 * std: The `drop` method now takes `&mut self` instead of `&self`.
4669 * std: The prelude no longer reexports any modules, only types and traits.
4670 * std: Prelude additions: `print`, `println`, `FromStr`, `ApproxEq`, `Equiv`,
4671 `Iterator`, `IteratorUtil`, many numeric traits, many tuple traits.
4672 * std: New numeric traits: `Fractional`, `Real`, `RealExt`, `Integer`, `Ratio`,
4673 `Algebraic`, `Trigonometric`, `Exponential`, `Primitive`.
4674 * std: Tuple traits and accessors defined for up to 12-tuples, e.g.
4675 `(0, 1, 2).n2()` or `(0, 1, 2).n2_ref()`.
4676 * std: Many types implement `Clone`.
4677 * std: `path` type renamed to `Path`.
4678 * std: `mut` module and `Mut` type removed.
4679 * std: Many standalone functions removed in favor of methods and iterators
4680 in `vec`, `str`. In the future methods will also work as functions.
4681 * std: `reinterpret_cast` removed. Use `transmute`.
4682 * std: ascii string handling in `std::ascii`.
4683 * std: `Rand` is implemented for ~/@.
4684 * std: `run` module for spawning processes overhauled.
4685 * std: Various atomic types added to `unstable::atomic`.
4686 * std: Various types implement `Zero`.
4687 * std: `LinearMap` and `LinearSet` renamed to `HashMap` and `HashSet`.
4688 * std: Borrowed pointer functions moved from `ptr` to `borrow`.
4689 * std: Added `os::mkdir_recursive`.
4690 * std: Added `os::glob` function performs filesystems globs.
4691 * std: `FuzzyEq` renamed to `ApproxEq`.
4692 * std: `Map` now defines `pop` and `swap` methods.
4693 * std: `Cell` constructors converted to static methods.
4694 * extra: `rc` module adds the reference counted pointers, `Rc` and `RcMut`.
4695 * extra: `flate` module moved from `std` to `extra`.
4696 * extra: `fileinput` module for iterating over a series of files.
4697 * extra: `Complex` number type and `complex` module.
4698 * extra: `Rational` number type and `rational` module.
4699 * extra: `BigInt`, `BigUint` implement numeric and comparison traits.
4700 * extra: `term` uses terminfo now, is more correct.
4701 * extra: `arc` functions converted to methods.
4702 * extra: Implementation of fixed output size variations of SHA-2.
4705 * `unused_variable` lint mode for unused variables (default: warn).
4706 * `unused_unsafe` lint mode for detecting unnecessary `unsafe` blocks
4708 * `unused_mut` lint mode for identifying unused `mut` qualifiers
4710 * `dead_assignment` lint mode for unread variables (default: warn).
4711 * `unnecessary_allocation` lint mode detects some heap allocations that are
4712 immediately borrowed so could be written without allocating (default: warn).
4713 * `missing_doc` lint mode (default: allow).
4714 * `unreachable_code` lint mode (default: warn).
4715 * The `rusti` command has been rewritten and a number of bugs addressed.
4716 * rustc outputs in color on more terminals.
4717 * rustc accepts a `--link-args` flag to pass arguments to the linker.
4718 * rustc accepts a `-Z print-link-args` flag for debugging linkage.
4719 * Compiling with `-g` will make the binary record information about
4720 dynamic borrowcheck failures for debugging.
4721 * rustdoc has a nicer stylesheet.
4722 * Various improvements to rustdoc.
4723 * Improvements to rustpkg (see the detailed release notes).
4726 Version 0.6 (2013-04-03)
4727 ========================
4729 * ~2100 changes, numerous bugfixes
4732 * The self type parameter in traits is now spelled `Self`
4733 * The `self` parameter in trait and impl methods must now be explicitly
4734 named (for example: `fn f(&self) { }`). Implicit self is deprecated.
4735 * Static methods no longer require the `static` keyword and instead
4736 are distinguished by the lack of a `self` parameter
4737 * Replaced the `Durable` trait with the `'static` lifetime
4738 * The old closure type syntax with the trailing sigil has been
4739 removed in favor of the more consistent leading sigil
4740 * `super` is a keyword, and may be prefixed to paths
4741 * Trait bounds are separated with `+` instead of whitespace
4742 * Traits are implemented with `impl Trait for Type`
4743 instead of `impl Type: Trait`
4744 * Lifetime syntax is now `&'l foo` instead of `&l/foo`
4745 * The `export` keyword has finally been removed
4746 * The `move` keyword has been removed (see "Semantic changes")
4747 * The interior mutability qualifier on vectors, `[mut T]`, has been
4748 removed. Use `&mut [T]`, etc.
4749 * `mut` is no longer valid in `~mut T`. Use inherited mutability
4750 * `fail` is no longer a keyword. Use `fail!()`
4751 * `assert` is no longer a keyword. Use `assert!()`
4752 * `log` is no longer a keyword. use `debug!`, etc.
4753 * 1-tuples may be represented as `(T,)`
4754 * Struct fields may no longer be `mut`. Use inherited mutability,
4755 `@mut T`, `core::mut` or `core::cell`
4756 * `extern mod { ... }` is no longer valid syntax for foreign
4757 function modules. Use extern blocks: `extern { ... }`
4758 * Newtype enums removed. Use tuple-structs.
4759 * Trait implementations no longer support visibility modifiers
4760 * Pattern matching over vectors improved and expanded
4761 * `const` renamed to `static` to correspond to lifetime name,
4762 and make room for future `static mut` unsafe mutable globals.
4763 * Replaced `#[deriving_eq]` with `#[deriving(Eq)]`, etc.
4764 * `Clone` implementations can be automatically generated with
4765 `#[deriving(Clone)]`
4766 * Casts to traits must use a pointer sigil, e.g. `@foo as @Bar`
4767 instead of `foo as Bar`.
4768 * Fixed length vector types are now written as `[int, .. 3]`
4769 instead of `[int * 3]`.
4770 * Fixed length vector types can express the length as a constant
4771 expression. (ex: `[int, .. GL_BUFFER_SIZE - 2]`)
4774 * Types with owned pointers or custom destructors move by default,
4775 eliminating the `move` keyword
4776 * All foreign functions are considered unsafe
4777 * &mut is now unaliasable
4778 * Writes to borrowed @mut pointers are prevented dynamically
4780 * The name of the main function can be customized using #[main]
4781 * The default type of an inferred closure is &fn instead of @fn
4782 * `use` statements may no longer be "chained" - they cannot import
4783 identifiers imported by previous `use` statements
4784 * `use` statements are crate relative, importing from the "top"
4785 of the crate by default. Paths may be prefixed with `super::`
4786 or `self::` to change the search behavior.
4787 * Method visibility is inherited from the implementation declaration
4788 * Structural records have been removed
4789 * Many more types can be used in static items, including enums
4790 'static-lifetime pointers and vectors
4791 * Pattern matching over vectors improved and expanded
4792 * Typechecking of closure types has been overhauled to
4793 improve inference and eliminate unsoundness
4794 * Macros leave scope at the end of modules, unless that module is
4795 tagged with #[macro_escape]
4798 * Added big integers to `std::bigint`
4799 * Removed `core::oldcomm` module
4800 * Added pipe-based `core::comm` module
4801 * Numeric traits have been reorganized under `core::num`
4802 * `vec::slice` finally returns a slice
4803 * `debug!` and friends don't require a format string, e.g. `debug!(Foo)`
4804 * Containers reorganized around traits in `core::container`
4805 * `core::dvec` removed, `~[T]` is a drop-in replacement
4806 * `core::send_map` renamed to `core::hashmap`
4807 * `std::map` removed; replaced with `core::hashmap`
4808 * `std::treemap` reimplemented as an owned balanced tree
4809 * `std::deque` and `std::smallintmap` reimplemented as owned containers
4810 * `core::trie` added as a fast ordered map for integer keys
4811 * Set types added to `core::hashmap`, `core::trie` and `std::treemap`
4812 * `Ord` split into `Ord` and `TotalOrd`. `Ord` is still used to
4813 overload the comparison operators, whereas `TotalOrd` is used
4814 by certain container types
4817 * Replaced the 'cargo' package manager with 'rustpkg'
4818 * Added all-purpose 'rust' tool
4819 * `rustc --test` now supports benchmarks with the `#[bench]` attribute
4820 * rustc now *attempts* to offer spelling suggestions
4821 * Improved support for ARM and Android
4822 * Preliminary MIPS backend
4823 * Improved foreign function ABI implementation for x86, x86_64
4824 * Various memory usage improvements
4825 * Rust code may be embedded in foreign code under limited circumstances
4826 * Inline assembler supported by new asm!() syntax extension.
4829 Version 0.5 (2012-12-21)
4830 ===========================
4832 * ~900 changes, numerous bugfixes
4835 * Removed `<-` move operator
4836 * Completed the transition from the `#fmt` extension syntax to `fmt!`
4837 * Removed old fixed length vector syntax - `[T]/N`
4838 * New token-based quasi-quoters, `quote_tokens!`, `quote_expr!`, etc.
4839 * Macros may now expand to items and statements
4840 * `a.b()` is always parsed as a method call, never as a field projection
4841 * `Eq` and `IterBytes` implementations can be automatically generated
4842 with `#[deriving_eq]` and `#[deriving_iter_bytes]` respectively
4843 * Removed the special crate language for `.rc` files
4844 * Function arguments may consist of any irrefutable pattern
4847 * `&` and `~` pointers may point to objects
4848 * Tuple structs - `struct Foo(Bar, Baz)`. Will replace newtype enums.
4849 * Enum variants may be structs
4850 * Destructors can be added to all nominal types with the Drop trait
4851 * Structs and nullary enum variants may be constants
4852 * Values that cannot be implicitly copied are now automatically moved
4853 without writing `move` explicitly
4854 * `&T` may now be coerced to `*T`
4855 * Coercions happen in `let` statements as well as function calls
4856 * `use` statements now take crate-relative paths
4857 * The module and type namespaces have been merged so that static
4858 method names can be resolved under the trait in which they are
4861 * Improved support for language features
4862 * Trait inheritance works in many scenarios
4863 * More support for explicit self arguments in methods - `self`, `&self`
4864 `@self`, and `~self` all generally work as expected
4865 * Static methods work in more situations
4866 * Experimental: Traits may declare default methods for the implementations
4870 * New condition handling system in `core::condition`
4871 * Timsort added to `std::sort`
4872 * New priority queue, `std::priority_queue`
4873 * Pipes for serializable types, `std::flatpipes'
4874 * Serialization overhauled to be trait-based
4875 * Expanded `getopts` definitions
4876 * Moved futures to `std`
4877 * More functions are pure now
4878 * `core::comm` renamed to `oldcomm`. Still deprecated
4879 * `rustdoc` and `cargo` are libraries now
4882 * Added a preliminary REPL, `rusti`
4883 * License changed from MIT to dual MIT/APL2
4886 Version 0.4 (2012-10-15)
4887 ==========================
4889 * ~2000 changes, numerous bugfixes
4892 * All keywords are now strict and may not be used as identifiers anywhere
4893 * Keyword removal: 'again', 'import', 'check', 'new', 'owned', 'send',
4894 'of', 'with', 'to', 'class'.
4895 * Classes are replaced with simpler structs
4896 * Explicit method self types
4897 * `ret` became `return` and `alt` became `match`
4898 * `import` is now `use`; `use is now `extern mod`
4899 * `extern mod { ... }` is now `extern { ... }`
4900 * `use mod` is the recommended way to import modules
4901 * `pub` and `priv` replace deprecated export lists
4902 * The syntax of `match` pattern arms now uses fat arrow (=>)
4903 * `main` no longer accepts an args vector; use `os::args` instead
4906 * Trait implementations are now coherent, ala Haskell typeclasses
4907 * Trait methods may be static
4908 * Argument modes are deprecated
4909 * Borrowed pointers are much more mature and recommended for use
4910 * Strings and vectors in the static region are stored in constant memory
4911 * Typestate was removed
4912 * Resolution rewritten to be more reliable
4913 * Support for 'dual-mode' data structures (freezing and thawing)
4916 * Most binary operators can now be overloaded via the traits in
4918 * `std::net::url` for representing URLs
4919 * Sendable hash maps in `core::send_map`
4920 * `core::task' gained a (currently unsafe) task-local storage API
4923 * An efficient new intertask communication primitive called the pipe,
4924 along with a number of higher-level channel types, in `core::pipes`
4925 * `std::arc`, an atomically reference counted, immutable, shared memory
4927 * `std::sync`, various exotic synchronization tools based on arcs and pipes
4928 * Futures are now based on pipes and sendable
4929 * More robust linked task failure
4930 * Improved task builder API
4933 * Improved error reporting
4934 * Preliminary JIT support
4935 * Preliminary work on precise GC
4936 * Extensive architectural improvements to rustc
4937 * Begun a transition away from buggy C++-based reflection (shape) code to
4938 Rust-based (visitor) code
4939 * All hash functions and tables converted to secure, randomized SipHash
4942 Version 0.3 (2012-07-12)
4943 ========================
4945 * ~1900 changes, numerous bugfixes
4947 * New coding conveniences
4948 * Integer-literal suffix inference
4949 * Per-item control over warnings, errors
4950 * #[cfg(windows)] and #[cfg(unix)] attributes
4951 * Documentation comments
4952 * More compact closure syntax
4953 * 'do' expressions for treating higher-order functions as
4955 * *-patterns (wildcard extended to all constructor fields)
4958 * Name resolution pass and exhaustiveness checker rewritten
4959 * Region pointers and borrow checking supersede alias
4961 * Init-ness checking is now provided by a region-based liveness
4962 pass instead of the typestate pass; same for last-use analysis
4963 * Extensive work on region pointers
4965 * Experimental new language features
4966 * Slices and fixed-size, interior-allocated vectors
4967 * #!-comments for lang versioning, shell execution
4968 * Destructors and iface implementation for classes;
4969 type-parameterized classes and class methods
4970 * 'const' type kind for types that can be used to implement
4971 shared-memory concurrency patterns
4975 * Removal of various obsolete features
4976 * Keywords: 'be', 'prove', 'syntax', 'note', 'mutable', 'bind',
4977 'crust', 'native' (now 'extern'), 'cont' (now 'again')
4979 * Constructs: do-while loops ('do' repurposed), fn binding,
4980 resources (replaced by destructors)
4982 * Compiler reorganization
4983 * Syntax-layer of compiler split into separate crate
4984 * Clang (from LLVM project) integrated into build
4985 * Typechecker split into sub-modules
4988 * New time functions
4989 * Extension methods for many built-in types
4990 * Arc: atomic-refcount read-only / exclusive-use shared cells
4991 * Par: parallel map and search routines
4992 * Extensive work on libuv interface
4993 * Much vector code moved to libraries
4994 * Syntax extensions: #line, #col, #file, #mod, #stringify,
4995 #include, #include_str, #include_bin
4998 * Cargo automatically resolves dependencies
5001 Version 0.2 (2012-03-29)
5002 =========================
5004 * >1500 changes, numerous bugfixes
5006 * New docs and doc tooling
5008 * New port: FreeBSD x86_64
5010 * Compilation model enhancements
5011 * Generics now specialized, multiply instantiated
5012 * Functions now inlined across separate crates
5014 * Scheduling, stack and threading fixes
5015 * Noticeably improved message-passing performance
5016 * Explicit schedulers
5020 * Experimental new language features
5021 * Operator overloading
5025 * Various language extensions
5026 * C-callback function types: 'crust fn ...'
5027 * Infinite-loop construct: 'loop { ... }'
5028 * Shorten 'mutable' to 'mut'
5029 * Required mutable-local qualifier: 'let mut ...'
5030 * Basic glob-exporting: 'export foo::*;'
5031 * Alt now exhaustive, 'alt check' for runtime-checked
5032 * Block-function form of 'for' loop, with 'break' and 'ret'.
5035 * AST quasi-quote syntax extension
5036 * Revived libuv interface
5037 * New modules: core::{future, iter}, std::arena
5038 * Merged per-platform std::{os*, fs*} to core::{libc, os}
5039 * Extensive cleanup, regularization in libstd, libcore
5042 Version 0.1 (2012-01-20)
5043 ===============================
5045 * Most language features work, including:
5046 * Unique pointers, unique closures, move semantics
5047 * Interface-constrained generics
5048 * Static interface dispatch
5050 * Multithread task scheduling
5051 * Typestate predicates
5052 * Failure unwinding, destructors
5053 * Pattern matching and destructuring assignment
5054 * Lightweight block-lambda syntax
5055 * Preliminary macro-by-example
5057 * Compiler works with the following configurations:
5058 * Linux: x86 and x86_64 hosts and targets
5059 * macOS: x86 and x86_64 hosts and targets
5060 * Windows: x86 hosts and targets
5062 * Cross compilation / multi-target configuration supported.
5064 * Preliminary API-documentation and package-management tools included.
5068 * Documentation is incomplete.
5070 * Performance is below intended target.
5072 * Standard library APIs are subject to extensive change, reorganization.
5074 * Language-level versioning is not yet operational - future code will