1 Version 1.34.0 (2019-04-11)
2 ==========================
6 - [You can now use `#[deprecated = "reason"]`][58166] as a shorthand for
7 `#[deprecated(note = "reason")]`. This was previously allowed by mistake
9 - [You can now accept token streams in `#[attr()]`,`#[attr[]]`, and
10 `#[attr{}]` procedural macros.][57367]
11 - [You can now write `extern crate self as foo;`][57407] to import your
12 crate's root into the extern prelude.
17 - [You can now target `riscv64imac-unknown-none-elf` and
18 `riscv64gc-unknown-none-elf`.][58406]
19 - [You can now enable linker plugin LTO optimisations with
20 `-C linker-plugin-lto`.][58057] This allows rustc to compile your Rust code
21 into LLVM bitcode allowing LLVM to perform LTO optimisations across C/C++ FFI
23 - [You can now target `powerpc64-unknown-freebsd`.][57809]
28 - [The trait bounds have been removed on some of `HashMap<K, V, S>`'s and
29 `HashSet<T, S>`'s basic methods.][58370] Most notably you no longer require
30 the `Hash` trait to create an iterator.
31 - [The `Ord` trait bounds have been removed on some of `BinaryHeap<T>`'s basic
32 methods.][58421] Most notably you no longer require the `Ord` trait to create
34 - [The methods `overflowing_neg` and `wrapping_neg` are now `const` functions
35 for all numeric types.][58044]
36 - [Indexing a `str` is now generic over all types that
37 implement `SliceIndex<str>`.][57604]
38 - [`str::trim`, `str::trim_matches`, `str::trim_{start, end}`, and
39 `str::trim_{start, end}_matches` are now `#[must_use]`][57106] and will
40 produce a warning if their returning type is unused.
41 - [The methods `checked_pow`, `saturating_pow`, `wrapping_pow`, and
42 `overflowing_pow` are now available for all numeric types.][57873] These are
43 equivalvent to methods such as `wrapping_add` for the `pow` operation.
52 * [`atomic::AtomicI16`]
53 * [`atomic::AtomicI32`]
54 * [`atomic::AtomicI64`]
55 * [`atomic::AtomicI8`]
56 * [`atomic::AtomicU16`]
57 * [`atomic::AtomicU32`]
58 * [`atomic::AtomicU64`]
59 * [`atomic::AtomicU8`]
60 * [`convert::Infallible`]
61 * [`convert::TryFrom`]
62 * [`convert::TryInto`]
64 * [`iter::successors`]
65 * [`num::NonZeroI128`]
70 * [`num::NonZeroIsize`]
71 * [`slice::sort_by_cached_key`]
72 * [`str::escape_debug`]
73 * [`str::escape_default`]
74 * [`str::escape_unicode`]
75 * [`str::split_ascii_whitespace`]
78 * [`Instant::checked_add`]
79 * [`Instant::checked_sub`]
80 * [`SystemTime::checked_add`]
81 * [`SystemTime::checked_sub`]
85 - [You can now use alternative registries to crates.io.][cargo/6654]
89 - [You can now use the `?` operator in your documentation tests without manually
90 adding `fn main() -> Result<(), _> {}`.][56470]
94 - [`Command::before_exec` is now deprecated in favor of the
95 unsafe method `Command::pre_exec`.][58059]
96 - [Use of `ATOMIC_{BOOL, ISIZE, USIZE}_INIT` is now deprecated.][57425] As you
97 can now use `const` functions in `static` variables.
99 [58370]: https://github.com/rust-lang/rust/pull/58370/
100 [58406]: https://github.com/rust-lang/rust/pull/58406/
101 [58421]: https://github.com/rust-lang/rust/pull/58421/
102 [58166]: https://github.com/rust-lang/rust/pull/58166/
103 [58044]: https://github.com/rust-lang/rust/pull/58044/
104 [58057]: https://github.com/rust-lang/rust/pull/58057/
105 [58059]: https://github.com/rust-lang/rust/pull/58059/
106 [57809]: https://github.com/rust-lang/rust/pull/57809/
107 [57873]: https://github.com/rust-lang/rust/pull/57873/
108 [57604]: https://github.com/rust-lang/rust/pull/57604/
109 [57367]: https://github.com/rust-lang/rust/pull/57367/
110 [57407]: https://github.com/rust-lang/rust/pull/57407/
111 [57425]: https://github.com/rust-lang/rust/pull/57425/
112 [57106]: https://github.com/rust-lang/rust/pull/57106/
113 [56470]: https://github.com/rust-lang/rust/pull/56470/
114 [cargo/6654]: https://github.com/rust-lang/cargo/pull/6654/
115 [`Any::type_id`]: https://doc.rust-lang.org/std/any/trait.Any.html#tymethod.type_id
116 [`Error::type_id`]: https://doc.rust-lang.org/std/error/trait.Error.html#method.type_id
117 [`atomic::AtomicI16`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicI16.html
118 [`atomic::AtomicI32`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicI32.html
119 [`atomic::AtomicI64`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicI64.html
120 [`atomic::AtomicI8`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicI8.html
121 [`atomic::AtomicU16`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU16.html
122 [`atomic::AtomicU32`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU32.html
123 [`atomic::AtomicU64`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU64.html
124 [`atomic::AtomicU8`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html
125 [`convert::Infallible`]: https://doc.rust-lang.org/std/convert/enum.Infallible.html
126 [`convert::TryFrom`]: https://doc.rust-lang.org/std/convert/trait.TryFrom.html
127 [`convert::TryInto`]: https://doc.rust-lang.org/std/convert/trait.TryInto.html
128 [`iter::from_fn`]: https://doc.rust-lang.org/std/iter/fn.from_fn.html
129 [`iter::successors`]: https://doc.rust-lang.org/std/iter/fn.successors.html
130 [`num::NonZeroI128`]: https://doc.rust-lang.org/std/num/struct.NonZeroI128.html
131 [`num::NonZeroI16`]: https://doc.rust-lang.org/std/num/struct.NonZeroI16.html
132 [`num::NonZeroI32`]: https://doc.rust-lang.org/std/num/struct.NonZeroI32.html
133 [`num::NonZeroI64`]: https://doc.rust-lang.org/std/num/struct.NonZeroI64.html
134 [`num::NonZeroI8`]: https://doc.rust-lang.org/std/num/struct.NonZeroI8.html
135 [`num::NonZeroIsize`]: https://doc.rust-lang.org/std/num/struct.NonZeroIsize.html
136 [`slice::sort_by_cached_key`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_by_cached_key
137 [`str::escape_debug`]: https://doc.rust-lang.org/std/primitive.str.html#method.escape_debug
138 [`str::escape_default`]: https://doc.rust-lang.org/std/primitive.str.html#method.escape_default
139 [`str::escape_unicode`]: https://doc.rust-lang.org/std/primitive.str.html#method.escape_unicode
140 [`str::split_ascii_whitespace`]: https://doc.rust-lang.org/std/primitive.str.html#method.split_ascii_whitespace
141 [`Instant::checked_add`]: https://doc.rust-lang.org/std/time/struct.Instant.html#method.checked_add
142 [`Instant::checked_sub`]: https://doc.rust-lang.org/std/time/struct.Instant.html#method.checked_sub
143 [`SystemTime::checked_add`]: https://doc.rust-lang.org/std/time/struct.SystemTime.html#method.checked_add
144 [`SystemTime::checked_sub`]: https://doc.rust-lang.org/std/time/struct.SystemTime.html#method.checked_sub
147 Version 1.33.0 (2019-02-28)
148 ==========================
152 - [You can now use the `cfg(target_vendor)` attribute.][57465] E.g.
153 `#[cfg(target_vendor="apple")] fn main() { println!("Hello Apple!"); }`
154 - [Integer patterns such as in a match expression can now be exhaustive.][56362]
155 E.g. You can have match statement on a `u8` that covers `0..=255` and
156 you would no longer be required to have a `_ => unreachable!()` case.
157 - [You can now have multiple patterns in `if let` and `while let`
158 expressions.][57532] You can do this with the same syntax as a `match`
168 let state = Creature::Crab("Ferris");
170 if let Creature::Crab(name) | Creature::Person(name) = state {
171 println!("This creature's name is: {}", name);
175 - [You can now have irrefutable `if let` and `while let` patterns.][57535] Using
176 this feature will by default produce a warning as this behaviour can be
177 unintuitive. E.g. `if let _ = 5 {}`
178 - [You can now use `let` bindings, assignments, expression statements,
179 and irrefutable pattern destructuring in const functions.][57175]
180 - [You can now call unsafe const functions.][57067] E.g.
182 const unsafe fn foo() -> i32 { 5 }
183 const fn bar() -> i32 {
187 - [You can now specify multiple attributes in a `cfg_attr` attribute.][57332]
188 E.g. `#[cfg_attr(all(), must_use, optimize)]`
189 - [You can now specify a specific alignment with the `#[repr(packed)]`
190 attribute.][57049] E.g. `#[repr(packed(2))] struct Foo(i16, i32);` is a struct
191 with an alignment of 2 bytes and a size of 6 bytes.
192 - [You can now import an item from a module as an `_`.][56303] This allows you to
193 import a trait's impls, and not have the name in the namespace. E.g.
195 use std::io::Read as _;
197 // Allowed as there is only one `Read` in the module.
200 - [You may now use `Rc`, `Arc`, and `Pin` as method receivers][56805].
204 - [You can now set a linker flavor for `rustc` with the `-Clinker-flavor`
205 command line argument.][56351]
206 - [The mininum required LLVM version has been bumped to 6.0.][56642]
207 - [Added support for the PowerPC64 architecture on FreeBSD.][57615]
208 - [The `x86_64-fortanix-unknown-sgx` target support has been upgraded to
209 tier 2 support.][57130] Visit the [platform support][platform-support] page for
210 information on Rust's platform support.
211 - [Added support for the `thumbv7neon-linux-androideabi` and
212 `thumbv7neon-unknown-linux-gnueabihf` targets.][56947]
213 - [Added support for the `x86_64-unknown-uefi` target.][56769]
217 - [The methods `overflowing_{add, sub, mul, shl, shr}` are now `const`
218 functions for all numeric types.][57566]
219 - [The methods `rotate_left`, `rotate_right`, and `wrapping_{add, sub, mul, shl, shr}`
220 are now `const` functions for all numeric types.][57105]
221 - [The methods `is_positive` and `is_negative` are now `const` functions for
222 all signed numeric types.][57105]
223 - [The `get` method for all `NonZero` types is now `const`.][57167]
224 - [The methods `count_ones`, `count_zeros`, `leading_zeros`, `trailing_zeros`,
225 `swap_bytes`, `from_be`, `from_le`, `to_be`, `to_le` are now `const` for all
226 numeric types.][57234]
227 - [`Ipv4Addr::new` is now a `const` function][57234]
231 - [`unix::FileExt::read_exact_at`]
232 - [`unix::FileExt::write_all_at`]
233 - [`Option::transpose`]
234 - [`Result::transpose`]
235 - [`convert::identity`]
238 - [`marker::PhantomPinned`]
239 - [`Vec::resize_with`]
240 - [`VecDeque::resize_with`]
241 - [`Duration::as_millis`]
242 - [`Duration::as_micros`]
243 - [`Duration::as_nanos`]
248 - [You can now publish crates that require a feature flag to compile with
249 `cargo publish --features` or `cargo publish --all-features`.][cargo/6453]
250 - [Cargo should now rebuild a crate if a file was modified during the initial
255 - The methods `str::{trim_left, trim_right, trim_left_matches, trim_right_matches}`
256 are now deprecated in the standard library, and their usage will now produce a warning.
257 Please use the `str::{trim_start, trim_end, trim_start_matches, trim_end_matches}`
259 - The `Error::cause` method has been deprecated in favor of `Error::source` which supports
261 - [Libtest no longer creates a new thread for each test when
262 `--test-threads=1`. It also runs the tests in deterministic order][56243]
264 [55982]: https://github.com/rust-lang/rust/pull/55982/
265 [56243]: https://github.com/rust-lang/rust/pull/56243
266 [56303]: https://github.com/rust-lang/rust/pull/56303/
267 [56351]: https://github.com/rust-lang/rust/pull/56351/
268 [56362]: https://github.com/rust-lang/rust/pull/56362
269 [56642]: https://github.com/rust-lang/rust/pull/56642/
270 [56769]: https://github.com/rust-lang/rust/pull/56769/
271 [56805]: https://github.com/rust-lang/rust/pull/56805
272 [56947]: https://github.com/rust-lang/rust/pull/56947/
273 [57049]: https://github.com/rust-lang/rust/pull/57049/
274 [57067]: https://github.com/rust-lang/rust/pull/57067/
275 [57105]: https://github.com/rust-lang/rust/pull/57105
276 [57130]: https://github.com/rust-lang/rust/pull/57130/
277 [57167]: https://github.com/rust-lang/rust/pull/57167/
278 [57175]: https://github.com/rust-lang/rust/pull/57175/
279 [57234]: https://github.com/rust-lang/rust/pull/57234/
280 [57332]: https://github.com/rust-lang/rust/pull/57332/
281 [57465]: https://github.com/rust-lang/rust/pull/57465/
282 [57532]: https://github.com/rust-lang/rust/pull/57532/
283 [57535]: https://github.com/rust-lang/rust/pull/57535/
284 [57566]: https://github.com/rust-lang/rust/pull/57566/
285 [57615]: https://github.com/rust-lang/rust/pull/57615/
286 [cargo/6453]: https://github.com/rust-lang/cargo/pull/6453/
287 [cargo/6484]: https://github.com/rust-lang/cargo/pull/6484/
288 [`unix::FileExt::read_exact_at`]: https://doc.rust-lang.org/std/os/unix/fs/trait.FileExt.html#method.read_exact_at
289 [`unix::FileExt::write_all_at`]: https://doc.rust-lang.org/std/os/unix/fs/trait.FileExt.html#method.write_all_at
290 [`Option::transpose`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.transpose
291 [`Result::transpose`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.transpose
292 [`convert::identity`]: https://doc.rust-lang.org/std/convert/fn.identity.html
293 [`pin::Pin`]: https://doc.rust-lang.org/std/pin/struct.Pin.html
294 [`marker::Unpin`]: https://doc.rust-lang.org/stable/std/marker/trait.Unpin.html
295 [`marker::PhantomPinned`]: https://doc.rust-lang.org/nightly/std/marker/struct.PhantomPinned.html
296 [`Vec::resize_with`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.resize_with
297 [`VecDeque::resize_with`]: https://doc.rust-lang.org/std/collections/struct.VecDeque.html#method.resize_with
298 [`Duration::as_millis`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.as_millis
299 [`Duration::as_micros`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.as_micros
300 [`Duration::as_nanos`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.as_nanos
301 [platform-support]: https://forge.rust-lang.org/platform-support.html
303 Version 1.32.0 (2019-01-17)
304 ==========================
309 - [You can now use the `?` operator in macro definitions.][56245] The `?`
310 operator allows you to specify zero or one repetitions similar to the `*` and
312 - [Module paths with no leading keyword like `super`, `self`, or `crate`, will
313 now always resolve to the item (`enum`, `struct`, etc.) available in the
314 module if present, before resolving to a external crate or an item the prelude.][56759]
317 enum Color { Red, Green, Blue }
323 - [You can now match against `PhantomData<T>` types.][55837]
324 - [You can now match against literals in macros with the `literal`
325 specifier.][56072] This will match against a literal of any type.
326 E.g. `1`, `'A'`, `"Hello World"`
327 - [Self can now be used as a constructor and pattern for unit and tuple structs.][56365] E.g.
329 struct Point(i32, i32);
332 pub fn new(x: i32, y: i32) -> Self {
336 pub fn is_origin(&self) -> bool {
344 - [Self can also now be used in type definitions.][56366] E.g.
348 Self: PartialOrd<Self> // can write `Self` instead of `List<T>`
351 Cons(T, Box<Self>) // likewise here
354 - [You can now mark traits with `#[must_use]`.][55663] This provides a warning if
355 a `impl Trait` or `dyn Trait` is returned and unused in the program.
359 - [The default allocator has changed from jemalloc to the default allocator on
360 your system.][55238] The compiler itself on Linux & macOS will still use
361 jemalloc, but programs compiled with it will use the system allocator.
362 - [Added the `aarch64-pc-windows-msvc` target.][55702]
366 - [`PathBuf` now implements `FromStr`.][55148]
367 - [`Box<[T]>` now implements `FromIterator<T>`.][55843]
368 - [The `dbg!` macro has been stabilized.][56395] This macro enables you to
369 easily debug expressions in your rust program. E.g.
372 let b = dbg!(a * 2) + 1;
373 // ^-- prints: [src/main.rs:4] a * 2 = 4
377 The following APIs are now `const` functions and can be used in a
381 - [`UnsafeCell::get`]
384 - [`ManuallyDrop::new`]
385 - [`ManuallyDrop::into_inner`]
386 - [`RangeInclusive::start`]
387 - [`RangeInclusive::end`]
388 - [`NonNull::as_ptr`]
391 - [`Duration::as_secs`]
392 - [`Duration::subsec_millis`]
393 - [`Duration::subsec_micros`]
394 - [`Duration::subsec_nanos`]
396 - [`Ipv4Addr::is_unspecified`]
398 - [`Ipv6Addr::octets`]
402 - [`i8::to_be_bytes`]
403 - [`i8::to_le_bytes`]
404 - [`i8::to_ne_bytes`]
405 - [`i8::from_be_bytes`]
406 - [`i8::from_le_bytes`]
407 - [`i8::from_ne_bytes`]
408 - [`i16::to_be_bytes`]
409 - [`i16::to_le_bytes`]
410 - [`i16::to_ne_bytes`]
411 - [`i16::from_be_bytes`]
412 - [`i16::from_le_bytes`]
413 - [`i16::from_ne_bytes`]
414 - [`i32::to_be_bytes`]
415 - [`i32::to_le_bytes`]
416 - [`i32::to_ne_bytes`]
417 - [`i32::from_be_bytes`]
418 - [`i32::from_le_bytes`]
419 - [`i32::from_ne_bytes`]
420 - [`i64::to_be_bytes`]
421 - [`i64::to_le_bytes`]
422 - [`i64::to_ne_bytes`]
423 - [`i64::from_be_bytes`]
424 - [`i64::from_le_bytes`]
425 - [`i64::from_ne_bytes`]
426 - [`i128::to_be_bytes`]
427 - [`i128::to_le_bytes`]
428 - [`i128::to_ne_bytes`]
429 - [`i128::from_be_bytes`]
430 - [`i128::from_le_bytes`]
431 - [`i128::from_ne_bytes`]
432 - [`isize::to_be_bytes`]
433 - [`isize::to_le_bytes`]
434 - [`isize::to_ne_bytes`]
435 - [`isize::from_be_bytes`]
436 - [`isize::from_le_bytes`]
437 - [`isize::from_ne_bytes`]
438 - [`u8::to_be_bytes`]
439 - [`u8::to_le_bytes`]
440 - [`u8::to_ne_bytes`]
441 - [`u8::from_be_bytes`]
442 - [`u8::from_le_bytes`]
443 - [`u8::from_ne_bytes`]
444 - [`u16::to_be_bytes`]
445 - [`u16::to_le_bytes`]
446 - [`u16::to_ne_bytes`]
447 - [`u16::from_be_bytes`]
448 - [`u16::from_le_bytes`]
449 - [`u16::from_ne_bytes`]
450 - [`u32::to_be_bytes`]
451 - [`u32::to_le_bytes`]
452 - [`u32::to_ne_bytes`]
453 - [`u32::from_be_bytes`]
454 - [`u32::from_le_bytes`]
455 - [`u32::from_ne_bytes`]
456 - [`u64::to_be_bytes`]
457 - [`u64::to_le_bytes`]
458 - [`u64::to_ne_bytes`]
459 - [`u64::from_be_bytes`]
460 - [`u64::from_le_bytes`]
461 - [`u64::from_ne_bytes`]
462 - [`u128::to_be_bytes`]
463 - [`u128::to_le_bytes`]
464 - [`u128::to_ne_bytes`]
465 - [`u128::from_be_bytes`]
466 - [`u128::from_le_bytes`]
467 - [`u128::from_ne_bytes`]
468 - [`usize::to_be_bytes`]
469 - [`usize::to_le_bytes`]
470 - [`usize::to_ne_bytes`]
471 - [`usize::from_be_bytes`]
472 - [`usize::from_le_bytes`]
473 - [`usize::from_ne_bytes`]
477 - [You can now run `cargo c` as an alias for `cargo check`.][cargo/6218]
478 - [Usernames are now allowed in alt registry URLs.][cargo/6242]
482 - [`libproc_macro` has been added to the `rust-src` distribution.][55280]
486 - [The argument types for AVX's
487 `_mm256_stream_si256`, `_mm256_stream_pd`, `_mm256_stream_ps`][55610] have
488 been changed from `*const` to `*mut` as the previous implementation
492 [55148]: https://github.com/rust-lang/rust/pull/55148/
493 [55238]: https://github.com/rust-lang/rust/pull/55238/
494 [55280]: https://github.com/rust-lang/rust/pull/55280/
495 [55610]: https://github.com/rust-lang/rust/pull/55610/
496 [55663]: https://github.com/rust-lang/rust/pull/55663/
497 [55702]: https://github.com/rust-lang/rust/pull/55702/
498 [55837]: https://github.com/rust-lang/rust/pull/55837/
499 [55843]: https://github.com/rust-lang/rust/pull/55843/
500 [56072]: https://github.com/rust-lang/rust/pull/56072/
501 [56245]: https://github.com/rust-lang/rust/pull/56245/
502 [56365]: https://github.com/rust-lang/rust/pull/56365/
503 [56366]: https://github.com/rust-lang/rust/pull/56366/
504 [56395]: https://github.com/rust-lang/rust/pull/56395/
505 [56759]: https://github.com/rust-lang/rust/pull/56759/
506 [cargo/6218]: https://github.com/rust-lang/cargo/pull/6218/
507 [cargo/6242]: https://github.com/rust-lang/cargo/pull/6242/
508 [`CStr::as_ptr`]: https://doc.rust-lang.org/std/ffi/struct.CStr.html#method.as_ptr
509 [`Cell::as_ptr`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.as_ptr
510 [`Duration::as_secs`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.as_secs
511 [`Duration::subsec_micros`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.subsec_micros
512 [`Duration::subsec_millis`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.subsec_millis
513 [`Duration::subsec_nanos`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.subsec_nanos
514 [`Ipv4Addr::is_unspecified`]: https://doc.rust-lang.org/std/net/struct.Ipv4Addr.html#method.is_unspecified
515 [`Ipv6Addr::new`]: https://doc.rust-lang.org/std/net/struct.Ipv6Addr.html#method.new
516 [`Ipv6Addr::octets`]: https://doc.rust-lang.org/std/net/struct.Ipv6Addr.html#method.octets
517 [`ManuallyDrop::into_inner`]: https://doc.rust-lang.org/std/mem/struct.ManuallyDrop.html#method.into_inner
518 [`ManuallyDrop::new`]: https://doc.rust-lang.org/std/mem/struct.ManuallyDrop.html#method.new
519 [`NonNull::as_ptr`]: https://doc.rust-lang.org/std/ptr/struct.NonNull.html#method.as_ptr
520 [`RangeInclusive::end`]: https://doc.rust-lang.org/std/ops/struct.RangeInclusive.html#method.end
521 [`RangeInclusive::start`]: https://doc.rust-lang.org/std/ops/struct.RangeInclusive.html#method.start
522 [`UnsafeCell::get`]: https://doc.rust-lang.org/std/cell/struct.UnsafeCell.html#method.get
523 [`slice::as_ptr`]: https://doc.rust-lang.org/std/primitive.slice.html#method.as_ptr
524 [`char::is_ascii`]: https://doc.rust-lang.org/std/primitive.char.html#method.is_ascii
525 [`i128::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i128.html#method.from_be_bytes
526 [`i128::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i128.html#method.from_le_bytes
527 [`i128::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i128.html#method.from_ne_bytes
528 [`i128::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i128.html#method.to_be_bytes
529 [`i128::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i128.html#method.to_le_bytes
530 [`i128::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i128.html#method.to_ne_bytes
531 [`i16::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i16.html#method.from_be_bytes
532 [`i16::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i16.html#method.from_le_bytes
533 [`i16::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i16.html#method.from_ne_bytes
534 [`i16::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i16.html#method.to_be_bytes
535 [`i16::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i16.html#method.to_le_bytes
536 [`i16::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i16.html#method.to_ne_bytes
537 [`i32::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i32.html#method.from_be_bytes
538 [`i32::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i32.html#method.from_le_bytes
539 [`i32::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i32.html#method.from_ne_bytes
540 [`i32::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i32.html#method.to_be_bytes
541 [`i32::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i32.html#method.to_le_bytes
542 [`i32::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i32.html#method.to_ne_bytes
543 [`i64::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i64.html#method.from_be_bytes
544 [`i64::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i64.html#method.from_le_bytes
545 [`i64::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i64.html#method.from_ne_bytes
546 [`i64::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i64.html#method.to_be_bytes
547 [`i64::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i64.html#method.to_le_bytes
548 [`i64::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i64.html#method.to_ne_bytes
549 [`i8::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i8.html#method.from_be_bytes
550 [`i8::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i8.html#method.from_le_bytes
551 [`i8::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i8.html#method.from_ne_bytes
552 [`i8::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i8.html#method.to_be_bytes
553 [`i8::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i8.html#method.to_le_bytes
554 [`i8::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.i8.html#method.to_ne_bytes
555 [`isize::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.isize.html#method.from_be_bytes
556 [`isize::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.isize.html#method.from_le_bytes
557 [`isize::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.isize.html#method.from_ne_bytes
558 [`isize::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.isize.html#method.to_be_bytes
559 [`isize::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.isize.html#method.to_le_bytes
560 [`isize::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.isize.html#method.to_ne_bytes
561 [`iter::empty`]: https://doc.rust-lang.org/std/iter/fn.empty.html
562 [`str::as_ptr`]: https://doc.rust-lang.org/std/primitive.str.html#method.as_ptr
563 [`u128::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u128.html#method.from_be_bytes
564 [`u128::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u128.html#method.from_le_bytes
565 [`u128::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u128.html#method.from_ne_bytes
566 [`u128::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u128.html#method.to_be_bytes
567 [`u128::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u128.html#method.to_le_bytes
568 [`u128::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u128.html#method.to_ne_bytes
569 [`u16::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u16.html#method.from_be_bytes
570 [`u16::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u16.html#method.from_le_bytes
571 [`u16::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u16.html#method.from_ne_bytes
572 [`u16::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u16.html#method.to_be_bytes
573 [`u16::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u16.html#method.to_le_bytes
574 [`u16::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u16.html#method.to_ne_bytes
575 [`u32::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u32.html#method.from_be_bytes
576 [`u32::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u32.html#method.from_le_bytes
577 [`u32::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u32.html#method.from_ne_bytes
578 [`u32::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u32.html#method.to_be_bytes
579 [`u32::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u32.html#method.to_le_bytes
580 [`u32::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u32.html#method.to_ne_bytes
581 [`u64::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u64.html#method.from_be_bytes
582 [`u64::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u64.html#method.from_le_bytes
583 [`u64::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u64.html#method.from_ne_bytes
584 [`u64::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u64.html#method.to_be_bytes
585 [`u64::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u64.html#method.to_le_bytes
586 [`u64::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u64.html#method.to_ne_bytes
587 [`u8::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u8.html#method.from_be_bytes
588 [`u8::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u8.html#method.from_le_bytes
589 [`u8::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u8.html#method.from_ne_bytes
590 [`u8::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u8.html#method.to_be_bytes
591 [`u8::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u8.html#method.to_le_bytes
592 [`u8::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.u8.html#method.to_ne_bytes
593 [`usize::from_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.usize.html#method.from_be_bytes
594 [`usize::from_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.usize.html#method.from_le_bytes
595 [`usize::from_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.usize.html#method.from_ne_bytes
596 [`usize::to_be_bytes`]: https://doc.rust-lang.org/stable/std/primitive.usize.html#method.to_be_bytes
597 [`usize::to_le_bytes`]: https://doc.rust-lang.org/stable/std/primitive.usize.html#method.to_le_bytes
598 [`usize::to_ne_bytes`]: https://doc.rust-lang.org/stable/std/primitive.usize.html#method.to_ne_bytes
601 Version 1.31.1 (2018-12-20)
602 ===========================
604 - [Fix Rust failing to build on `powerpc-unknown-netbsd`][56562]
605 - [Fix broken go-to-definition in RLS][rls/1171]
606 - [Fix infinite loop on hover in RLS][rls/1170]
608 [56562]: https://github.com/rust-lang/rust/pull/56562
609 [rls/1171]: https://github.com/rust-lang/rls/issues/1171
610 [rls/1170]: https://github.com/rust-lang/rls/pull/1170
612 Version 1.31.0 (2018-12-06)
613 ==========================
617 - 🎉 [This version marks the release of the 2018 edition of Rust.][54057] 🎉
618 - [New lifetime elision rules now allow for eliding lifetimes in functions and
619 impl headers.][54778] E.g. `impl<'a> Reader for BufReader<'a> {}` can now be
620 `impl Reader for BufReader<'_> {}`. Lifetimes are still required to be defined
622 - [You can now define and use `const` functions.][54835] These are currently
623 a strict minimal subset of the [const fn RFC][RFC-911]. Refer to the
624 [language reference][const-reference] for what exactly is available.
625 - [You can now use tool lints, which allow you to scope lints from external
626 tools using attributes.][54870] E.g. `#[allow(clippy::filter_map)]`.
627 - [`#[no_mangle]` and `#[export_name]` attributes can now be located anywhere in
628 a crate, not just in exported functions.][54451]
629 - [You can now use parentheses in pattern matches.][54497]
633 - [Updated musl to 1.1.20][54430]
637 - [You can now convert `num::NonZero*` types to their raw equivalvents using the
638 `From` trait.][54240] E.g. `u8` now implements `From<NonZeroU8>`.
639 - [You can now convert a `&Option<T>` into `Option<&T>` and `&mut Option<T>`
640 into `Option<&mut T>` using the `From` trait.][53218]
641 - [You can now multiply (`*`) a `time::Duration` by a `u32`.][52813]
646 - [`slice::align_to`]
647 - [`slice::align_to_mut`]
648 - [`slice::chunks_exact`]
649 - [`slice::chunks_exact_mut`]
651 - [`slice::rchunks_mut`]
652 - [`slice::rchunks_exact`]
653 - [`slice::rchunks_exact_mut`]
654 - [`Option::replace`]
658 - [Cargo will now download crates in parallel using HTTP/2.][cargo/6005]
659 - [You can now rename packages in your Cargo.toml][cargo/6319] We have a guide
660 on [how to use the `package` key in your dependencies.][cargo-rename-reference]
662 [52813]: https://github.com/rust-lang/rust/pull/52813/
663 [53218]: https://github.com/rust-lang/rust/pull/53218/
664 [53555]: https://github.com/rust-lang/rust/issues/53555/
665 [54057]: https://github.com/rust-lang/rust/pull/54057/
666 [54240]: https://github.com/rust-lang/rust/pull/54240/
667 [54430]: https://github.com/rust-lang/rust/pull/54430/
668 [54451]: https://github.com/rust-lang/rust/pull/54451/
669 [54497]: https://github.com/rust-lang/rust/pull/54497/
670 [54778]: https://github.com/rust-lang/rust/pull/54778/
671 [54835]: https://github.com/rust-lang/rust/pull/54835/
672 [54870]: https://github.com/rust-lang/rust/pull/54870/
673 [RFC-911]: https://github.com/rust-lang/rfcs/pull/911
674 [`Option::replace`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.replace
675 [`slice::align_to_mut`]: https://doc.rust-lang.org/std/primitive.slice.html#method.align_to_mut
676 [`slice::align_to`]: https://doc.rust-lang.org/std/primitive.slice.html#method.align_to
677 [`slice::chunks_exact_mut`]: https://doc.rust-lang.org/std/primitive.slice.html#method.chunks_exact_mut
678 [`slice::chunks_exact`]: https://doc.rust-lang.org/std/primitive.slice.html#method.chunks_exact
679 [`slice::rchunks_exact_mut`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rchunks_mut
680 [`slice::rchunks_exact`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rchunks_exact
681 [`slice::rchunks_mut`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rchunks_mut
682 [`slice::rchunks`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rchunks
683 [cargo/6005]: https://github.com/rust-lang/cargo/pull/6005/
684 [cargo/6319]: https://github.com/rust-lang/cargo/pull/6319/
685 [cargo-rename-reference]: https://doc.rust-lang.org/cargo/reference/specifying-dependencies.html#renaming-dependencies-in-cargotoml
686 [const-reference]: https://doc.rust-lang.org/reference/items/functions.html#const-functions
688 Version 1.30.1 (2018-11-08)
689 ===========================
691 - [Fixed overflow ICE in rustdoc][54199]
692 - [Cap Cargo progress bar width at 60 in MSYS terminals][cargo/6122]
694 [54199]: https://github.com/rust-lang/rust/pull/54199
695 [cargo/6122]: https://github.com/rust-lang/cargo/pull/6122
697 Version 1.30.0 (2018-10-25)
698 ==========================
702 - [Procedural macros are now available.][52081] These kinds of macros allow for
703 more powerful code generation. There is a [new chapter available][proc-macros]
704 in the Rust Programming Language book that goes further in depth.
705 - [You can now use keywords as identifiers using the raw identifiers
706 syntax (`r#`),][53236] e.g. `let r#for = true;`
707 - [Using anonymous parameters in traits is now deprecated with a warning and
708 will be a hard error in the 2018 edition.][53272]
709 - [You can now use `crate` in paths.][54404] This allows you to refer to the
710 crate root in the path, e.g. `use crate::foo;` refers to `foo` in `src/lib.rs`.
711 - [Using a external crate no longer requires being prefixed with `::`.][54404]
712 Previously, using a external crate in a module without a use statement
713 required `let json = ::serde_json::from_str(foo);` but can now be written
714 as `let json = serde_json::from_str(foo);`.
715 - [You can now apply the `#[used]` attribute to static items to prevent the
716 compiler from optimising them away, even if they appear to be unused,][51363]
717 e.g. `#[used] static FOO: u32 = 1;`
718 - [You can now import and reexport macros from other crates with the `use`
719 syntax.][50911] Macros exported with `#[macro_export]` are now placed into
720 the root module of the crate. If your macro relies on calling other local
721 macros, it is recommended to export with the
722 `#[macro_export(local_inner_macros)]` attribute so users won't have to import
724 - [You can now catch visibility keywords (e.g. `pub`, `pub(crate)`) in macros
725 using the `vis` specifier.][53370]
726 - [Non-macro attributes now allow all forms of literals, not just
727 strings.][53044] Previously, you would write `#[attr("true")]`, and you can now
728 write `#[attr(true)]`.
729 - [You can now specify a function to handle a panic in the Rust runtime with the
730 `#[panic_handler]` attribute.][51366]
734 - [Added the `riscv32imc-unknown-none-elf` target.][53822]
735 - [Added the `aarch64-unknown-netbsd` target][53165]
739 - [`ManuallyDrop` now allows the inner type to be unsized.][53033]
743 - [`Ipv4Addr::BROADCAST`]
744 - [`Ipv4Addr::LOCALHOST`]
745 - [`Ipv4Addr::UNSPECIFIED`]
746 - [`Ipv6Addr::LOCALHOST`]
747 - [`Ipv6Addr::UNSPECIFIED`]
748 - [`Iterator::find_map`]
750 The following methods are replacement methods for `trim_left`, `trim_right`,
751 `trim_left_matches`, and `trim_right_matches`, which will be deprecated
753 - [`str::trim_end_matches`]
755 - [`str::trim_start_matches`]
756 - [`str::trim_start`]
760 - [`cargo run` doesn't require specifying a package in workspaces.][cargo/5877]
761 - [`cargo doc` now supports `--message-format=json`.][cargo/5878] This is
762 equivalent to calling `rustdoc --error-format=json`.
763 - [Cargo will now provide a progress bar for builds.][cargo/5995]
767 - [`rustdoc` allows you to specify what edition to treat your code as with the
768 `--edition` option.][54057]
769 - [`rustdoc` now has the `--color` (specify whether to output color) and
770 `--error-format` (specify error format, e.g. `json`) options.][53003]
771 - [We now distribute a `rust-gdbgui` script that invokes `gdbgui` with Rust
772 debug symbols.][53774]
773 - [Attributes from Rust tools such as `rustfmt` or `clippy` are now
774 available,][53459] e.g. `#[rustfmt::skip]` will skip formatting the next item.
776 [50911]: https://github.com/rust-lang/rust/pull/50911/
777 [51363]: https://github.com/rust-lang/rust/pull/51363/
778 [51366]: https://github.com/rust-lang/rust/pull/51366/
779 [52081]: https://github.com/rust-lang/rust/pull/52081/
780 [53003]: https://github.com/rust-lang/rust/pull/53003/
781 [53033]: https://github.com/rust-lang/rust/pull/53033/
782 [53044]: https://github.com/rust-lang/rust/pull/53044/
783 [53165]: https://github.com/rust-lang/rust/pull/53165/
784 [53213]: https://github.com/rust-lang/rust/pull/53213/
785 [53236]: https://github.com/rust-lang/rust/pull/53236/
786 [53272]: https://github.com/rust-lang/rust/pull/53272/
787 [53370]: https://github.com/rust-lang/rust/pull/53370/
788 [53459]: https://github.com/rust-lang/rust/pull/53459/
789 [53774]: https://github.com/rust-lang/rust/pull/53774/
790 [53822]: https://github.com/rust-lang/rust/pull/53822/
791 [54057]: https://github.com/rust-lang/rust/pull/54057/
792 [54146]: https://github.com/rust-lang/rust/pull/54146/
793 [54404]: https://github.com/rust-lang/rust/pull/54404/
794 [cargo/5877]: https://github.com/rust-lang/cargo/pull/5877/
795 [cargo/5878]: https://github.com/rust-lang/cargo/pull/5878/
796 [cargo/5995]: https://github.com/rust-lang/cargo/pull/5995/
797 [proc-macros]: https://doc.rust-lang.org/nightly/book/2018-edition/ch19-06-macros.html
799 [`Ipv4Addr::BROADCAST`]: https://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#associatedconstant.BROADCAST
800 [`Ipv4Addr::LOCALHOST`]: https://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#associatedconstant.LOCALHOST
801 [`Ipv4Addr::UNSPECIFIED`]: https://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#associatedconstant.UNSPECIFIED
802 [`Ipv6Addr::LOCALHOST`]: https://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#associatedconstant.LOCALHOST
803 [`Ipv6Addr::UNSPECIFIED`]: https://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#associatedconstant.UNSPECIFIED
804 [`Iterator::find_map`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.find_map
805 [`str::trim_end_matches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.trim_end_matches
806 [`str::trim_end`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.trim_end
807 [`str::trim_start_matches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.trim_start_matches
808 [`str::trim_start`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.trim_start
811 Version 1.29.2 (2018-10-11)
812 ===========================
814 - [Workaround for an aliasing-related LLVM bug, which caused miscompilation.][54639]
815 - The `rls-preview` component on the windows-gnu targets has been restored.
817 [54639]: https://github.com/rust-lang/rust/pull/54639
820 Version 1.29.1 (2018-09-25)
821 ===========================
826 - The standard library's `str::repeat` function contained an out of bounds write
827 caused by an integer overflow. This has been fixed by deterministically
828 panicking when an overflow happens.
830 Thank you to Scott McMurray for responsibily disclosing this vulnerability to
834 Version 1.29.0 (2018-09-13)
835 ==========================
839 - [Bumped minimum LLVM version to 5.0.][51899]
840 - [Added `powerpc64le-unknown-linux-musl` target.][51619]
841 - [Added `aarch64-unknown-hermit` and `x86_64-unknown-hermit` targets.][52861]
845 - [`Once::call_once` no longer requires `Once` to be `'static`.][52239]
846 - [`BuildHasherDefault` now implements `PartialEq` and `Eq`.][52402]
847 - [`Box<CStr>`, `Box<OsStr>`, and `Box<Path>` now implement `Clone`.][51912]
848 - [Implemented `PartialEq<&str>` for `OsString` and `PartialEq<OsString>`
850 - [`Cell<T>` now allows `T` to be unsized.][50494]
851 - [`SocketAddr` is now stable on Redox.][52656]
856 - [`Iterator::flatten`]
861 - [Cargo can silently fix some bad lockfiles.][cargo/5831] You can use
862 `--locked` to disable this behavior.
863 - [`cargo-install` will now allow you to cross compile an install
864 using `--target`.][cargo/5614]
865 - [Added the `cargo-fix` subcommand to automatically move project code from
866 2015 edition to 2018.][cargo/5723]
867 - [`cargo doc` can now optionally document private types using the
868 `--document-private-items` flag.][cargo/5543]
872 - [`rustdoc` now has the `--cap-lints` option which demotes all lints above
873 the specified level to that level.][52354] For example `--cap-lints warn`
874 will demote `deny` and `forbid` lints to `warn`.
875 - [`rustc` and `rustdoc` will now have the exit code of `1` if compilation
876 fails and `101` if there is a panic.][52197]
877 - [A preview of clippy has been made available through rustup.][51122]
878 You can install the preview with `rustup component add clippy-preview`.
882 - [`str::{slice_unchecked, slice_unchecked_mut}` are now deprecated.][51807]
883 Use `str::get_unchecked(begin..end)` instead.
884 - [`std::env::home_dir` is now deprecated for its unintuitive behavior.][51656]
885 Consider using the `home_dir` function from
886 https://crates.io/crates/dirs instead.
887 - [`rustc` will no longer silently ignore invalid data in target spec.][52330]
888 - [`cfg` attributes and `--cfg` command line flags are now more
889 strictly validated.][53893]
891 [53893]: https://github.com/rust-lang/rust/pull/53893/
892 [52861]: https://github.com/rust-lang/rust/pull/52861/
893 [52656]: https://github.com/rust-lang/rust/pull/52656/
894 [52239]: https://github.com/rust-lang/rust/pull/52239/
895 [52330]: https://github.com/rust-lang/rust/pull/52330/
896 [52354]: https://github.com/rust-lang/rust/pull/52354/
897 [52402]: https://github.com/rust-lang/rust/pull/52402/
898 [52103]: https://github.com/rust-lang/rust/pull/52103/
899 [52197]: https://github.com/rust-lang/rust/pull/52197/
900 [51807]: https://github.com/rust-lang/rust/pull/51807/
901 [51899]: https://github.com/rust-lang/rust/pull/51899/
902 [51912]: https://github.com/rust-lang/rust/pull/51912/
903 [51511]: https://github.com/rust-lang/rust/pull/51511/
904 [51619]: https://github.com/rust-lang/rust/pull/51619/
905 [51656]: https://github.com/rust-lang/rust/pull/51656/
906 [51178]: https://github.com/rust-lang/rust/pull/51178/
907 [51122]: https://github.com/rust-lang/rust/pull/51122
908 [50494]: https://github.com/rust-lang/rust/pull/50494/
909 [cargo/5543]: https://github.com/rust-lang/cargo/pull/5543
910 [cargo/5614]: https://github.com/rust-lang/cargo/pull/5614/
911 [cargo/5723]: https://github.com/rust-lang/cargo/pull/5723/
912 [cargo/5831]: https://github.com/rust-lang/cargo/pull/5831/
913 [`Arc::downcast`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.downcast
914 [`Iterator::flatten`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.flatten
915 [`Rc::downcast`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.downcast
918 Version 1.28.0 (2018-08-02)
919 ===========================
923 - [The `#[repr(transparent)]` attribute is now stable.][51562] This attribute
924 allows a Rust newtype wrapper (`struct NewType<T>(T);`) to be represented as
925 the inner type across Foreign Function Interface (FFI) boundaries.
926 - [The keywords `pure`, `sizeof`, `alignof`, and `offsetof` have been unreserved
927 and can now be used as identifiers.][51196]
928 - [The `GlobalAlloc` trait and `#[global_allocator]` attribute are now
929 stable.][51241] This will allow users to specify a global allocator for
931 - [Unit test functions marked with the `#[test]` attribute can now return
932 `Result<(), E: Debug>` in addition to `()`.][51298]
933 - [The `lifetime` specifier for `macro_rules!` is now stable.][50385] This
934 allows macros to easily target lifetimes.
938 - [The `s` and `z` optimisation levels are now stable.][50265] These optimisations
939 prioritise making smaller binary sizes. `z` is the same as `s` with the
940 exception that it does not vectorise loops, which typically results in an even
942 - [The short error format is now stable.][49546] Specified with
943 `--error-format=short` this option will provide a more compressed output of
945 - [Added a lint warning when you have duplicated `macro_export`s.][50143]
946 - [Reduced the number of allocations in the macro parser.][50855] This can
947 improve compile times of macro heavy crates on average by 5%.
951 - [Implemented `Default` for `&mut str`.][51306]
952 - [Implemented `From<bool>` for all integer and unsigned number types.][50554]
953 - [Implemented `Extend` for `()`.][50234]
954 - [The `Debug` implementation of `time::Duration` should now be more easily
955 human readable.][50364] Previously a `Duration` of one second would printed as
956 `Duration { secs: 1, nanos: 0 }` and will now be printed as `1s`.
957 - [Implemented `From<&String>` for `Cow<str>`, `From<&Vec<T>>` for `Cow<[T]>`,
958 `From<Cow<CStr>>` for `CString`, `From<CString>, From<CStr>, From<&CString>`
959 for `Cow<CStr>`, `From<OsString>, From<OsStr>, From<&OsString>` for
960 `Cow<OsStr>`, `From<&PathBuf>` for `Cow<Path>`, and `From<Cow<Path>>`
961 for `PathBuf`.][50170]
962 - [Implemented `Shl` and `Shr` for `Wrapping<u128>`
963 and `Wrapping<i128>`.][50465]
964 - [`DirEntry::metadata` now uses `fstatat` instead of `lstat` when
965 possible.][51050] This can provide up to a 40% speed increase.
966 - [Improved error messages when using `format!`.][50610]
970 - [`Iterator::step_by`]
971 - [`Path::ancestors`]
972 - [`SystemTime::UNIX_EPOCH`]
973 - [`alloc::GlobalAlloc`]
975 - [`alloc::LayoutErr`]
978 - [`alloc::alloc_zeroed`]
981 - [`alloc::handle_alloc_error`]
982 - [`btree_map::Entry::or_default`]
984 - [`hash_map::Entry::or_default`]
985 - [`iter::repeat_with`]
986 - [`num::NonZeroUsize`]
987 - [`num::NonZeroU128`]
988 - [`num::NonZeroU16`]
989 - [`num::NonZeroU32`]
990 - [`num::NonZeroU64`]
992 - [`ops::RangeBounds`]
993 - [`slice::SliceIndex`]
994 - [`slice::from_mut`]
995 - [`slice::from_ref`]
996 - [`{Any + Send + Sync}::downcast_mut`]
997 - [`{Any + Send + Sync}::downcast_ref`]
998 - [`{Any + Send + Sync}::is`]
1002 - [Cargo will now no longer allow you to publish crates with build scripts that
1003 modify the `src` directory.][cargo/5584] The `src` directory in a crate should be
1004 considered to be immutable.
1008 - [The `suggestion_applicability` field in `rustc`'s json output is now
1009 stable.][50486] This will allow dev tools to check whether a code suggestion
1010 would apply to them.
1014 - [Rust will consider trait objects with duplicated constraints to be the same
1015 type as without the duplicated constraint.][51276] For example the below code will
1016 now fail to compile.
1021 fn test(&self) { println!("one"); } //~ ERROR duplicate definitions with name `test`
1024 impl Trait + Send + Send {
1025 fn test(&self) { println!("two"); }
1029 [49546]: https://github.com/rust-lang/rust/pull/49546/
1030 [50143]: https://github.com/rust-lang/rust/pull/50143/
1031 [50170]: https://github.com/rust-lang/rust/pull/50170/
1032 [50234]: https://github.com/rust-lang/rust/pull/50234/
1033 [50265]: https://github.com/rust-lang/rust/pull/50265/
1034 [50364]: https://github.com/rust-lang/rust/pull/50364/
1035 [50385]: https://github.com/rust-lang/rust/pull/50385/
1036 [50465]: https://github.com/rust-lang/rust/pull/50465/
1037 [50486]: https://github.com/rust-lang/rust/pull/50486/
1038 [50554]: https://github.com/rust-lang/rust/pull/50554/
1039 [50610]: https://github.com/rust-lang/rust/pull/50610/
1040 [50855]: https://github.com/rust-lang/rust/pull/50855/
1041 [51050]: https://github.com/rust-lang/rust/pull/51050/
1042 [51196]: https://github.com/rust-lang/rust/pull/51196/
1043 [51200]: https://github.com/rust-lang/rust/pull/51200/
1044 [51241]: https://github.com/rust-lang/rust/pull/51241/
1045 [51276]: https://github.com/rust-lang/rust/pull/51276/
1046 [51298]: https://github.com/rust-lang/rust/pull/51298/
1047 [51306]: https://github.com/rust-lang/rust/pull/51306/
1048 [51562]: https://github.com/rust-lang/rust/pull/51562/
1049 [cargo/5584]: https://github.com/rust-lang/cargo/pull/5584/
1050 [`Iterator::step_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.step_by
1051 [`Path::ancestors`]: https://doc.rust-lang.org/std/path/struct.Path.html#method.ancestors
1052 [`SystemTime::UNIX_EPOCH`]: https://doc.rust-lang.org/std/time/struct.SystemTime.html#associatedconstant.UNIX_EPOCH
1053 [`alloc::GlobalAlloc`]: https://doc.rust-lang.org/std/alloc/trait.GlobalAlloc.html
1054 [`alloc::Layout`]: https://doc.rust-lang.org/std/alloc/struct.Layout.html
1055 [`alloc::LayoutErr`]: https://doc.rust-lang.org/std/alloc/struct.LayoutErr.html
1056 [`alloc::System`]: https://doc.rust-lang.org/std/alloc/struct.System.html
1057 [`alloc::alloc`]: https://doc.rust-lang.org/std/alloc/fn.alloc.html
1058 [`alloc::alloc_zeroed`]: https://doc.rust-lang.org/std/alloc/fn.alloc_zeroed.html
1059 [`alloc::dealloc`]: https://doc.rust-lang.org/std/alloc/fn.dealloc.html
1060 [`alloc::realloc`]: https://doc.rust-lang.org/std/alloc/fn.realloc.html
1061 [`alloc::handle_alloc_error`]: https://doc.rust-lang.org/std/alloc/fn.handle_alloc_error.html
1062 [`btree_map::Entry::or_default`]: https://doc.rust-lang.org/std/collections/btree_map/enum.Entry.html#method.or_default
1063 [`fmt::Alignment`]: https://doc.rust-lang.org/std/fmt/enum.Alignment.html
1064 [`hash_map::Entry::or_default`]: https://doc.rust-lang.org/std/collections/hash_map/enum.Entry.html#method.or_default
1065 [`iter::repeat_with`]: https://doc.rust-lang.org/std/iter/fn.repeat_with.html
1066 [`num::NonZeroUsize`]: https://doc.rust-lang.org/std/num/struct.NonZeroUsize.html
1067 [`num::NonZeroU128`]: https://doc.rust-lang.org/std/num/struct.NonZeroU128.html
1068 [`num::NonZeroU16`]: https://doc.rust-lang.org/std/num/struct.NonZeroU16.html
1069 [`num::NonZeroU32`]: https://doc.rust-lang.org/std/num/struct.NonZeroU32.html
1070 [`num::NonZeroU64`]: https://doc.rust-lang.org/std/num/struct.NonZeroU64.html
1071 [`num::NonZeroU8`]: https://doc.rust-lang.org/std/num/struct.NonZeroU8.html
1072 [`ops::RangeBounds`]: https://doc.rust-lang.org/std/ops/trait.RangeBounds.html
1073 [`slice::SliceIndex`]: https://doc.rust-lang.org/std/slice/trait.SliceIndex.html
1074 [`slice::from_mut`]: https://doc.rust-lang.org/std/slice/fn.from_mut.html
1075 [`slice::from_ref`]: https://doc.rust-lang.org/std/slice/fn.from_ref.html
1076 [`{Any + Send + Sync}::downcast_mut`]: https://doc.rust-lang.org/std/any/trait.Any.html#method.downcast_mut-2
1077 [`{Any + Send + Sync}::downcast_ref`]: https://doc.rust-lang.org/std/any/trait.Any.html#method.downcast_ref-2
1078 [`{Any + Send + Sync}::is`]: https://doc.rust-lang.org/std/any/trait.Any.html#method.is-2
1080 Version 1.27.2 (2018-07-20)
1081 ===========================
1086 - The borrow checker was fixed to avoid potential unsoundness when using
1087 match ergonomics: [#52213][52213].
1089 [52213]: https://github.com/rust-lang/rust/issues/52213
1091 Version 1.27.1 (2018-07-10)
1092 ===========================
1097 - rustdoc would execute plugins in the /tmp/rustdoc/plugins directory
1098 when running, which enabled executing code as some other user on a
1099 given machine. This release fixes that vulnerability; you can read
1100 more about this on the [blog][rustdoc-sec]. The associated CVE is [CVE-2018-1000622].
1102 Thank you to Red Hat for responsibily disclosing this vulnerability to us.
1107 - The borrow checker was fixed to avoid an additional potential unsoundness when using
1108 match ergonomics: [#51415][51415], [#49534][49534].
1110 [51415]: https://github.com/rust-lang/rust/issues/51415
1111 [49534]: https://github.com/rust-lang/rust/issues/49534
1112 [rustdoc-sec]: https://blog.rust-lang.org/2018/07/06/security-advisory-for-rustdoc.html
1113 [CVE-2018-1000622]: https://cve.mitre.org/cgi-bin/cvename.cgi?name=%20CVE-2018-1000622
1115 Version 1.27.0 (2018-06-21)
1116 ==========================
1120 - [Removed 'proc' from the reserved keywords list.][49699] This allows `proc` to
1121 be used as an identifier.
1122 - [The dyn syntax is now available.][49968] This syntax is equivalent to the
1123 bare `Trait` syntax, and should make it clearer when being used in tandem with
1124 `impl Trait` because it is equivalent to the following syntax:
1125 `&Trait == &dyn Trait`, `&mut Trait == &mut dyn Trait`, and
1126 `Box<Trait> == Box<dyn Trait>`.
1127 - [Attributes on generic parameters such as types and lifetimes are
1128 now stable.][48851] e.g.
1129 `fn foo<#[lifetime_attr] 'a, #[type_attr] T: 'a>() {}`
1130 - [The `#[must_use]` attribute can now also be used on functions as well as
1131 types.][48925] It provides a lint that by default warns users when the
1132 value returned by a function has not been used.
1136 - [Added the `armv5te-unknown-linux-musleabi` target.][50423]
1140 - [SIMD (Single Instruction Multiple Data) on x86/x86_64 is now stable.][49664]
1141 This includes [`arch::x86`] & [`arch::x86_64`] modules which contain
1142 SIMD intrinsics, a new macro called `is_x86_feature_detected!`, the
1143 `#[target_feature(enable="")]` attribute, and adding `target_feature = ""` to
1144 the `cfg` attribute.
1145 - [A lot of methods for `[u8]`, `f32`, and `f64` previously only available in
1146 std are now available in core.][49896]
1147 - [The generic `Rhs` type parameter on `ops::{Shl, ShlAssign, Shr}` now defaults
1149 - [`std::str::replace` now has the `#[must_use]` attribute][50177] to clarify
1150 that the operation isn't done in place.
1151 - [`Clone::clone`, `Iterator::collect`, and `ToOwned::to_owned` now have
1152 the `#[must_use]` attribute][49533] to warn about unused potentially
1153 expensive allocations.
1157 - [`DoubleEndedIterator::rfind`]
1158 - [`DoubleEndedIterator::rfold`]
1159 - [`DoubleEndedIterator::try_rfold`]
1160 - [`Duration::from_micros`]
1161 - [`Duration::from_nanos`]
1162 - [`Duration::subsec_micros`]
1163 - [`Duration::subsec_millis`]
1164 - [`HashMap::remove_entry`]
1165 - [`Iterator::try_fold`]
1166 - [`Iterator::try_for_each`]
1168 - [`Option::filter`]
1169 - [`String::replace_range`]
1170 - [`Take::set_limit`]
1171 - [`hint::unreachable_unchecked`]
1172 - [`os::unix::process::parent_id`]
1173 - [`ptr::swap_nonoverlapping`]
1174 - [`slice::rsplit_mut`]
1176 - [`slice::swap_with_slice`]
1180 - [`cargo-metadata` now includes `authors`, `categories`, `keywords`,
1181 `readme`, and `repository` fields.][cargo/5386]
1182 - [`cargo-metadata` now includes a package's `metadata` table.][cargo/5360]
1183 - [Added the `--target-dir` optional argument.][cargo/5393] This allows you to specify
1184 a different directory than `target` for placing compilation artifacts.
1185 - [Cargo will be adding automatic target inference for binaries, benchmarks,
1186 examples, and tests in the Rust 2018 edition.][cargo/5335] If your project specifies
1187 specific targets, e.g. using `[[bin]]`, and have other binaries in locations
1188 where cargo would infer a binary, Cargo will produce a warning. You can
1189 disable this feature ahead of time by setting any of the following to false:
1190 `autobins`, `autobenches`, `autoexamples`, `autotests`.
1191 - [Cargo will now cache compiler information.][cargo/5359] This can be disabled by
1192 setting `CARGO_CACHE_RUSTC_INFO=0` in your environment.
1196 - [Added “The Rustc book” into the official documentation.][49707]
1197 [“The Rustc book”] documents and teaches how to use the rustc compiler.
1198 - [All books available on `doc.rust-lang.org` are now searchable.][49623]
1202 - [Calling a `CharExt` or `StrExt` method directly on core will no longer
1203 work.][49896] e.g. `::core::prelude::v1::StrExt::is_empty("")` will not
1204 compile, `"".is_empty()` will still compile.
1205 - [`Debug` output on `atomic::{AtomicBool, AtomicIsize, AtomicPtr, AtomicUsize}`
1206 will only print the inner type.][48553] E.g.
1207 `print!("{:?}", AtomicBool::new(true))` will print `true`,
1208 not `AtomicBool(true)`.
1209 - [The maximum number for `repr(align(N))` is now 2²⁹.][50378] Previously you
1210 could enter higher numbers but they were not supported by LLVM. Up to 512MB
1211 alignment should cover all use cases.
1212 - The `.description()` method on the `std::error::Error` trait
1213 [has been soft-deprecated][50163]. It is no longer required to implement it.
1215 [48553]: https://github.com/rust-lang/rust/pull/48553/
1216 [48851]: https://github.com/rust-lang/rust/pull/48851/
1217 [48925]: https://github.com/rust-lang/rust/pull/48925/
1218 [49533]: https://github.com/rust-lang/rust/pull/49533/
1219 [49623]: https://github.com/rust-lang/rust/pull/49623/
1220 [49630]: https://github.com/rust-lang/rust/pull/49630/
1221 [49664]: https://github.com/rust-lang/rust/pull/49664/
1222 [49699]: https://github.com/rust-lang/rust/pull/49699/
1223 [49707]: https://github.com/rust-lang/rust/pull/49707/
1224 [49719]: https://github.com/rust-lang/rust/pull/49719/
1225 [49896]: https://github.com/rust-lang/rust/pull/49896/
1226 [49968]: https://github.com/rust-lang/rust/pull/49968/
1227 [50163]: https://github.com/rust-lang/rust/pull/50163
1228 [50177]: https://github.com/rust-lang/rust/pull/50177/
1229 [50378]: https://github.com/rust-lang/rust/pull/50378/
1230 [50398]: https://github.com/rust-lang/rust/pull/50398/
1231 [50423]: https://github.com/rust-lang/rust/pull/50423/
1232 [cargo/5203]: https://github.com/rust-lang/cargo/pull/5203/
1233 [cargo/5335]: https://github.com/rust-lang/cargo/pull/5335/
1234 [cargo/5359]: https://github.com/rust-lang/cargo/pull/5359/
1235 [cargo/5360]: https://github.com/rust-lang/cargo/pull/5360/
1236 [cargo/5386]: https://github.com/rust-lang/cargo/pull/5386/
1237 [cargo/5393]: https://github.com/rust-lang/cargo/pull/5393/
1238 [`DoubleEndedIterator::rfind`]: https://doc.rust-lang.org/std/iter/trait.DoubleEndedIterator.html#method.rfind
1239 [`DoubleEndedIterator::rfold`]: https://doc.rust-lang.org/std/iter/trait.DoubleEndedIterator.html#method.rfold
1240 [`DoubleEndedIterator::try_rfold`]: https://doc.rust-lang.org/std/iter/trait.DoubleEndedIterator.html#method.try_rfold
1241 [`Duration::from_micros`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.from_micros
1242 [`Duration::from_nanos`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.from_nanos
1243 [`Duration::subsec_micros`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.subsec_micros
1244 [`Duration::subsec_millis`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.subsec_millis
1245 [`HashMap::remove_entry`]: https://doc.rust-lang.org/std/collections/struct.HashMap.html#method.remove_entry
1246 [`Iterator::try_fold`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.try_fold
1247 [`Iterator::try_for_each`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.try_for_each
1248 [`NonNull::cast`]: https://doc.rust-lang.org/std/ptr/struct.NonNull.html#method.cast
1249 [`Option::filter`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.filter
1250 [`String::replace_range`]: https://doc.rust-lang.org/std/string/struct.String.html#method.replace_range
1251 [`Take::set_limit`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.set_limit
1252 [`hint::unreachable_unchecked`]: https://doc.rust-lang.org/std/hint/fn.unreachable_unchecked.html
1253 [`os::unix::process::parent_id`]: https://doc.rust-lang.org/std/os/unix/process/fn.parent_id.html
1254 [`process::id`]: https://doc.rust-lang.org/std/process/fn.id.html
1255 [`ptr::swap_nonoverlapping`]: https://doc.rust-lang.org/std/ptr/fn.swap_nonoverlapping.html
1256 [`slice::rsplit_mut`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rsplit_mut
1257 [`slice::rsplit`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rsplit
1258 [`slice::swap_with_slice`]: https://doc.rust-lang.org/std/primitive.slice.html#method.swap_with_slice
1259 [`arch::x86_64`]: https://doc.rust-lang.org/std/arch/x86_64/index.html
1260 [`arch::x86`]: https://doc.rust-lang.org/std/arch/x86/index.html
1261 [“The Rustc book”]: https://doc.rust-lang.org/rustc
1264 Version 1.26.2 (2018-06-05)
1265 ==========================
1270 - [The borrow checker was fixed to avoid unsoundness when using match ergonomics.][51117]
1272 [51117]: https://github.com/rust-lang/rust/issues/51117
1275 Version 1.26.1 (2018-05-29)
1276 ==========================
1281 - [RLS now works on Windows.][50646]
1282 - [Rustfmt stopped badly formatting text in some cases.][rustfmt/2695]
1288 - [`fn main() -> impl Trait` no longer works for non-Termination
1290 This reverts an accidental stabilization.
1291 - [`NaN > NaN` no longer returns true in const-fn contexts.][50812]
1292 - [Prohibit using turbofish for `impl Trait` in method arguments.][50950]
1294 [50646]: https://github.com/rust-lang/rust/issues/50646
1295 [50656]: https://github.com/rust-lang/rust/pull/50656
1296 [50812]: https://github.com/rust-lang/rust/pull/50812
1297 [50950]: https://github.com/rust-lang/rust/issues/50950
1298 [rustfmt/2695]: https://github.com/rust-lang-nursery/rustfmt/issues/2695
1300 Version 1.26.0 (2018-05-10)
1301 ==========================
1305 - [Closures now implement `Copy` and/or `Clone` if all captured variables
1306 implement either or both traits.][49299]
1307 - [The inclusive range syntax e.g. `for x in 0..=10` is now stable.][47813]
1308 - [The `'_` lifetime is now stable. The underscore lifetime can be used anywhere a
1309 lifetime can be elided.][49458]
1310 - [`impl Trait` is now stable allowing you to have abstract types in returns
1311 or in function parameters.][49255] E.g. `fn foo() -> impl Iterator<Item=u8>` or
1312 `fn open(path: impl AsRef<Path>)`.
1313 - [Pattern matching will now automatically apply dereferences.][49394]
1314 - [128-bit integers in the form of `u128` and `i128` are now stable.][49101]
1315 - [`main` can now return `Result<(), E: Debug>`][49162] in addition to `()`.
1316 - [A lot of operations are now available in a const context.][46882] E.g. You
1317 can now index into constant arrays, reference and dereference into constants,
1318 and use tuple struct constructors.
1319 - [Fixed entry slice patterns are now stable.][48516] E.g.
1321 let points = [1, 2, 3, 4];
1323 [1, 2, 3, 4] => println!("All points were sequential."),
1324 _ => println!("Not all points were sequential."),
1331 - [LLD is now used as the default linker for `wasm32-unknown-unknown`.][48125]
1332 - [Fixed exponential projection complexity on nested types.][48296]
1333 This can provide up to a ~12% reduction in compile times for certain crates.
1334 - [Added the `--remap-path-prefix` option to rustc.][48359] Allowing you
1335 to remap path prefixes outputted by the compiler.
1336 - [Added `powerpc-unknown-netbsd` target.][48281]
1340 - [Implemented `From<u16> for usize` & `From<{u8, i16}> for isize`.][49305]
1341 - [Added hexadecimal formatting for integers with fmt::Debug][48978]
1342 e.g. `assert!(format!("{:02x?}", b"Foo\0") == "[46, 6f, 6f, 00]")`
1343 - [Implemented `Default, Hash` for `cmp::Reverse`.][48628]
1344 - [Optimized `str::repeat` being 8x faster in large cases.][48657]
1345 - [`ascii::escape_default` is now available in libcore.][48735]
1346 - [Trailing commas are now supported in std and core macros.][48056]
1347 - [Implemented `Copy, Clone` for `cmp::Reverse`][47379]
1348 - [Implemented `Clone` for `char::{ToLowercase, ToUppercase}`.][48629]
1353 - [`*const T::copy_to_nonoverlapping`]
1354 - [`*const T::copy_to`]
1355 - [`*const T::read_unaligned`]
1356 - [`*const T::read_volatile`]
1357 - [`*const T::read`]
1359 - [`*const T::wrapping_add`]
1360 - [`*const T::wrapping_sub`]
1362 - [`*mut T::copy_to_nonoverlapping`]
1363 - [`*mut T::copy_to`]
1364 - [`*mut T::read_unaligned`]
1365 - [`*mut T::read_volatile`]
1367 - [`*mut T::replace`]
1370 - [`*mut T::wrapping_add`]
1371 - [`*mut T::wrapping_sub`]
1372 - [`*mut T::write_bytes`]
1373 - [`*mut T::write_unaligned`]
1374 - [`*mut T::write_volatile`]
1377 - [`FromUtf8Error::as_bytes`]
1378 - [`LocalKey::try_with`]
1379 - [`Option::cloned`]
1380 - [`btree_map::Entry::and_modify`]
1381 - [`fs::read_to_string`]
1384 - [`hash_map::Entry::and_modify`]
1385 - [`iter::FusedIterator`]
1386 - [`ops::RangeInclusive`]
1387 - [`ops::RangeToInclusive`]
1389 - [`slice::rotate_left`]
1390 - [`slice::rotate_right`]
1391 - [`String::retain`]
1396 - [Cargo will now output path to custom commands when `-v` is
1397 passed with `--list`][cargo/5041]
1398 - [The Cargo binary version is now the same as the Rust version][cargo/5083]
1402 - [The second edition of "The Rust Programming Language" book is now recommended
1403 over the first.][48404]
1408 - [aliasing a `Fn` trait as `dyn` no longer works.][48481] E.g. the following
1409 syntax is now invalid.
1411 use std::ops::Fn as dyn;
1412 fn g(_: Box<dyn(std::fmt::Debug)>) {}
1414 - [The result of dereferences are no longer promoted to `'static`.][47408]
1418 const PAIR: &(i32, i32) = &(0, 1);
1419 let _reversed_pair: &'static _ = &(PAIR.1, PAIR.0); // Doesn't work
1422 - [Deprecate `AsciiExt` trait in favor of inherent methods.][49109]
1423 - [`".e0"` will now no longer parse as `0.0` and will instead cause
1425 - [Removed hoedown from rustdoc.][48274]
1426 - [Bounds on higher-kinded lifetimes a hard error.][48326]
1428 [46882]: https://github.com/rust-lang/rust/pull/46882
1429 [47379]: https://github.com/rust-lang/rust/pull/47379
1430 [47408]: https://github.com/rust-lang/rust/pull/47408
1431 [47813]: https://github.com/rust-lang/rust/pull/47813
1432 [48056]: https://github.com/rust-lang/rust/pull/48056
1433 [48125]: https://github.com/rust-lang/rust/pull/48125
1434 [48166]: https://github.com/rust-lang/rust/pull/48166
1435 [48235]: https://github.com/rust-lang/rust/pull/48235
1436 [48274]: https://github.com/rust-lang/rust/pull/48274
1437 [48281]: https://github.com/rust-lang/rust/pull/48281
1438 [48296]: https://github.com/rust-lang/rust/pull/48296
1439 [48326]: https://github.com/rust-lang/rust/pull/48326
1440 [48359]: https://github.com/rust-lang/rust/pull/48359
1441 [48404]: https://github.com/rust-lang/rust/pull/48404
1442 [48481]: https://github.com/rust-lang/rust/pull/48481
1443 [48516]: https://github.com/rust-lang/rust/pull/48516
1444 [48628]: https://github.com/rust-lang/rust/pull/48628
1445 [48629]: https://github.com/rust-lang/rust/pull/48629
1446 [48657]: https://github.com/rust-lang/rust/pull/48657
1447 [48735]: https://github.com/rust-lang/rust/pull/48735
1448 [48978]: https://github.com/rust-lang/rust/pull/48978
1449 [49101]: https://github.com/rust-lang/rust/pull/49101
1450 [49109]: https://github.com/rust-lang/rust/pull/49109
1451 [49121]: https://github.com/rust-lang/rust/pull/49121
1452 [49162]: https://github.com/rust-lang/rust/pull/49162
1453 [49184]: https://github.com/rust-lang/rust/pull/49184
1454 [49234]: https://github.com/rust-lang/rust/pull/49234
1455 [49255]: https://github.com/rust-lang/rust/pull/49255
1456 [49299]: https://github.com/rust-lang/rust/pull/49299
1457 [49305]: https://github.com/rust-lang/rust/pull/49305
1458 [49394]: https://github.com/rust-lang/rust/pull/49394
1459 [49458]: https://github.com/rust-lang/rust/pull/49458
1460 [`*const T::add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.add
1461 [`*const T::copy_to_nonoverlapping`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to_nonoverlapping
1462 [`*const T::copy_to`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to
1463 [`*const T::read_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_unaligned
1464 [`*const T::read_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_volatile
1465 [`*const T::read`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read
1466 [`*const T::sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.sub
1467 [`*const T::wrapping_add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_add
1468 [`*const T::wrapping_sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_sub
1469 [`*mut T::add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.add-1
1470 [`*mut T::copy_to_nonoverlapping`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to_nonoverlapping-1
1471 [`*mut T::copy_to`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to-1
1472 [`*mut T::read_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_unaligned-1
1473 [`*mut T::read_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_volatile-1
1474 [`*mut T::read`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read-1
1475 [`*mut T::replace`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.replace
1476 [`*mut T::sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.sub-1
1477 [`*mut T::swap`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.swap
1478 [`*mut T::wrapping_add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_add-1
1479 [`*mut T::wrapping_sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_sub-1
1480 [`*mut T::write_bytes`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_bytes
1481 [`*mut T::write_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_unaligned
1482 [`*mut T::write_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_volatile
1483 [`*mut T::write`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write
1484 [`Box::leak`]: https://doc.rust-lang.org/std/boxed/struct.Box.html#method.leak
1485 [`FromUtf8Error::as_bytes`]: https://doc.rust-lang.org/std/string/struct.FromUtf8Error.html#method.as_bytes
1486 [`LocalKey::try_with`]: https://doc.rust-lang.org/std/thread/struct.LocalKey.html#method.try_with
1487 [`Option::cloned`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.cloned
1488 [`btree_map::Entry::and_modify`]: https://doc.rust-lang.org/std/collections/btree_map/enum.Entry.html#method.and_modify
1489 [`fs::read_to_string`]: https://doc.rust-lang.org/std/fs/fn.read_to_string.html
1490 [`fs::read`]: https://doc.rust-lang.org/std/fs/fn.read.html
1491 [`fs::write`]: https://doc.rust-lang.org/std/fs/fn.write.html
1492 [`hash_map::Entry::and_modify`]: https://doc.rust-lang.org/std/collections/hash_map/enum.Entry.html#method.and_modify
1493 [`iter::FusedIterator`]: https://doc.rust-lang.org/std/iter/trait.FusedIterator.html
1494 [`ops::RangeInclusive`]: https://doc.rust-lang.org/std/ops/struct.RangeInclusive.html
1495 [`ops::RangeToInclusive`]: https://doc.rust-lang.org/std/ops/struct.RangeToInclusive.html
1496 [`process::id`]: https://doc.rust-lang.org/std/process/fn.id.html
1497 [`slice::rotate_left`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rotate_left
1498 [`slice::rotate_right`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rotate_right
1499 [`String::retain`]: https://doc.rust-lang.org/std/string/struct.String.html#method.retain
1500 [cargo/5041]: https://github.com/rust-lang/cargo/pull/5041
1501 [cargo/5083]: https://github.com/rust-lang/cargo/pull/5083
1504 Version 1.25.0 (2018-03-29)
1505 ==========================
1509 - [The `#[repr(align(x))]` attribute is now stable.][47006] [RFC 1358]
1510 - [You can now use nested groups of imports.][47948]
1511 e.g. `use std::{fs::File, io::Read, path::{Path, PathBuf}};`
1512 - [You can now have `|` at the start of a match arm.][47947] e.g.
1514 enum Foo { A, B, C }
1520 | Foo::B => println!("AB"),
1521 | Foo::C => println!("C"),
1528 - [Upgraded to LLVM 6.][47828]
1529 - [Added `-C lto=val` option.][47521]
1530 - [Added `i586-unknown-linux-musl` target][47282]
1534 - [Impl Send for `process::Command` on Unix.][47760]
1535 - [Impl PartialEq and Eq for `ParseCharError`.][47790]
1536 - [`UnsafeCell::into_inner` is now safe.][47204]
1537 - [Implement libstd for CloudABI.][47268]
1538 - [`Float::{from_bits, to_bits}` is now available in libcore.][46931]
1539 - [Implement `AsRef<Path>` for Component][46985]
1540 - [Implemented `Write` for `Cursor<&mut Vec<u8>>`][46830]
1541 - [Moved `Duration` to libcore.][46666]
1545 - [`Location::column`]
1548 The following functions can now be used in a constant expression.
1549 eg. `static MINUTE: Duration = Duration::from_secs(60);`
1550 - [`Duration::new`][47300]
1551 - [`Duration::from_secs`][47300]
1552 - [`Duration::from_millis`][47300]
1556 - [`cargo new` no longer removes `rust` or `rs` prefixs/suffixs.][cargo/5013]
1557 - [`cargo new` now defaults to creating a binary crate, instead of a
1558 library crate.][cargo/5029]
1562 - [Rust by example is now shipped with new releases][46196]
1566 - [Deprecated `net::lookup_host`.][47510]
1567 - [`rustdoc` has switched to pulldown as the default markdown renderer.][47398]
1568 - The borrow checker was sometimes incorrectly permitting overlapping borrows
1569 around indexing operations (see [#47349][47349]). This has been fixed (which also
1570 enabled some correct code that used to cause errors (e.g. [#33903][33903] and [#46095][46095]).
1571 - [Removed deprecated unstable attribute `#[simd]`.][47251]
1573 [33903]: https://github.com/rust-lang/rust/pull/33903
1574 [47947]: https://github.com/rust-lang/rust/pull/47947
1575 [47948]: https://github.com/rust-lang/rust/pull/47948
1576 [47760]: https://github.com/rust-lang/rust/pull/47760
1577 [47790]: https://github.com/rust-lang/rust/pull/47790
1578 [47828]: https://github.com/rust-lang/rust/pull/47828
1579 [47398]: https://github.com/rust-lang/rust/pull/47398
1580 [47510]: https://github.com/rust-lang/rust/pull/47510
1581 [47521]: https://github.com/rust-lang/rust/pull/47521
1582 [47204]: https://github.com/rust-lang/rust/pull/47204
1583 [47251]: https://github.com/rust-lang/rust/pull/47251
1584 [47268]: https://github.com/rust-lang/rust/pull/47268
1585 [47282]: https://github.com/rust-lang/rust/pull/47282
1586 [47300]: https://github.com/rust-lang/rust/pull/47300
1587 [47349]: https://github.com/rust-lang/rust/pull/47349
1588 [46931]: https://github.com/rust-lang/rust/pull/46931
1589 [46985]: https://github.com/rust-lang/rust/pull/46985
1590 [47006]: https://github.com/rust-lang/rust/pull/47006
1591 [46830]: https://github.com/rust-lang/rust/pull/46830
1592 [46095]: https://github.com/rust-lang/rust/pull/46095
1593 [46666]: https://github.com/rust-lang/rust/pull/46666
1594 [46196]: https://github.com/rust-lang/rust/pull/46196
1595 [cargo/5013]: https://github.com/rust-lang/cargo/pull/5013
1596 [cargo/5029]: https://github.com/rust-lang/cargo/pull/5029
1597 [RFC 1358]: https://github.com/rust-lang/rfcs/pull/1358
1598 [`Location::column`]: https://doc.rust-lang.org/std/panic/struct.Location.html#method.column
1599 [`ptr::NonNull`]: https://doc.rust-lang.org/std/ptr/struct.NonNull.html
1602 Version 1.24.1 (2018-03-01)
1603 ==========================
1605 - [Do not abort when unwinding through FFI][48251]
1606 - [Emit UTF-16 files for linker arguments on Windows][48318]
1607 - [Make the error index generator work again][48308]
1608 - [Cargo will warn on Windows 7 if an update is needed][cargo/5069].
1610 [48251]: https://github.com/rust-lang/rust/issues/48251
1611 [48308]: https://github.com/rust-lang/rust/issues/48308
1612 [48318]: https://github.com/rust-lang/rust/issues/48318
1613 [cargo/5069]: https://github.com/rust-lang/cargo/pull/5069
1616 Version 1.24.0 (2018-02-15)
1617 ==========================
1621 - [External `sysv64` ffi is now available.][46528]
1622 eg. `extern "sysv64" fn foo () {}`
1626 - [rustc now uses 16 codegen units by default for release builds.][46910]
1627 For the fastest builds, utilize `codegen-units=1`.
1628 - [Added `armv4t-unknown-linux-gnueabi` target.][47018]
1629 - [Add `aarch64-unknown-openbsd` support][46760]
1633 - [`str::find::<char>` now uses memchr.][46735] This should lead to a 10x
1634 improvement in performance in the majority of cases.
1635 - [`OsStr`'s `Debug` implementation is now lossless and consistent
1636 with Windows.][46798]
1637 - [`time::{SystemTime, Instant}` now implement `Hash`.][46828]
1638 - [impl `From<bool>` for `AtomicBool`][46293]
1639 - [impl `From<{CString, &CStr}>` for `{Arc<CStr>, Rc<CStr>}`][45990]
1640 - [impl `From<{OsString, &OsStr}>` for `{Arc<OsStr>, Rc<OsStr>}`][45990]
1641 - [impl `From<{PathBuf, &Path}>` for `{Arc<Path>, Rc<Path>}`][45990]
1642 - [float::from_bits now just uses transmute.][46012] This provides
1643 some optimisations from LLVM.
1644 - [Copied `AsciiExt` methods onto `char`][46077]
1645 - [Remove `T: Sized` requirement on `ptr::is_null()`][46094]
1646 - [impl `From<RecvError>` for `{TryRecvError, RecvTimeoutError}`][45506]
1647 - [Optimised `f32::{min, max}` to generate more efficient x86 assembly][47080]
1648 - [`[u8]::contains` now uses memchr which provides a 3x speed improvement][46713]
1652 - [`RefCell::replace`]
1654 - [`atomic::spin_loop_hint`]
1656 The following functions can now be used in a constant expression.
1657 eg. `let buffer: [u8; size_of::<usize>()];`, `static COUNTER: AtomicUsize = AtomicUsize::new(1);`
1659 - [`AtomicBool::new`][46287]
1660 - [`AtomicUsize::new`][46287]
1661 - [`AtomicIsize::new`][46287]
1662 - [`AtomicPtr::new`][46287]
1663 - [`Cell::new`][46287]
1664 - [`{integer}::min_value`][46287]
1665 - [`{integer}::max_value`][46287]
1666 - [`mem::size_of`][46287]
1667 - [`mem::align_of`][46287]
1668 - [`ptr::null`][46287]
1669 - [`ptr::null_mut`][46287]
1670 - [`RefCell::new`][46287]
1671 - [`UnsafeCell::new`][46287]
1675 - [Added a `workspace.default-members` config that
1676 overrides implied `--all` in virtual workspaces.][cargo/4743]
1677 - [Enable incremental by default on development builds.][cargo/4817] Also added
1678 configuration keys to `Cargo.toml` and `.cargo/config` to disable on a
1679 per-project or global basis respectively.
1686 - [Floating point types `Debug` impl now always prints a decimal point.][46831]
1687 - [`Ipv6Addr` now rejects superfluous `::`'s in IPv6 addresses][46671] This is
1688 in accordance with IETF RFC 4291 §2.2.
1689 - [Unwinding will no longer go past FFI boundaries, and will instead abort.][46833]
1690 - [`Formatter::flags` method is now deprecated.][46284] The `sign_plus`,
1691 `sign_minus`, `alternate`, and `sign_aware_zero_pad` should be used instead.
1692 - [Leading zeros in tuple struct members is now an error][47084]
1693 - [`column!()` macro is one-based instead of zero-based][46977]
1694 - [`fmt::Arguments` can no longer be shared across threads][45198]
1695 - [Access to `#[repr(packed)]` struct fields is now unsafe][44884]
1696 - [Cargo sets a different working directory for the compiler][cargo/4788]
1698 [44884]: https://github.com/rust-lang/rust/pull/44884
1699 [45198]: https://github.com/rust-lang/rust/pull/45198
1700 [45506]: https://github.com/rust-lang/rust/pull/45506
1701 [45904]: https://github.com/rust-lang/rust/pull/45904
1702 [45990]: https://github.com/rust-lang/rust/pull/45990
1703 [46012]: https://github.com/rust-lang/rust/pull/46012
1704 [46077]: https://github.com/rust-lang/rust/pull/46077
1705 [46094]: https://github.com/rust-lang/rust/pull/46094
1706 [46284]: https://github.com/rust-lang/rust/pull/46284
1707 [46287]: https://github.com/rust-lang/rust/pull/46287
1708 [46293]: https://github.com/rust-lang/rust/pull/46293
1709 [46528]: https://github.com/rust-lang/rust/pull/46528
1710 [46671]: https://github.com/rust-lang/rust/pull/46671
1711 [46713]: https://github.com/rust-lang/rust/pull/46713
1712 [46735]: https://github.com/rust-lang/rust/pull/46735
1713 [46749]: https://github.com/rust-lang/rust/pull/46749
1714 [46760]: https://github.com/rust-lang/rust/pull/46760
1715 [46798]: https://github.com/rust-lang/rust/pull/46798
1716 [46828]: https://github.com/rust-lang/rust/pull/46828
1717 [46831]: https://github.com/rust-lang/rust/pull/46831
1718 [46833]: https://github.com/rust-lang/rust/pull/46833
1719 [46910]: https://github.com/rust-lang/rust/pull/46910
1720 [46977]: https://github.com/rust-lang/rust/pull/46977
1721 [47018]: https://github.com/rust-lang/rust/pull/47018
1722 [47080]: https://github.com/rust-lang/rust/pull/47080
1723 [47084]: https://github.com/rust-lang/rust/pull/47084
1724 [cargo/4743]: https://github.com/rust-lang/cargo/pull/4743
1725 [cargo/4788]: https://github.com/rust-lang/cargo/pull/4788
1726 [cargo/4817]: https://github.com/rust-lang/cargo/pull/4817
1727 [`RefCell::replace`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.replace
1728 [`RefCell::swap`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.swap
1729 [`atomic::spin_loop_hint`]: https://doc.rust-lang.org/std/sync/atomic/fn.spin_loop_hint.html
1732 Version 1.23.0 (2018-01-04)
1733 ==========================
1737 - [Arbitrary `auto` traits are now permitted in trait objects.][45772]
1738 - [rustc now uses subtyping on the left hand side of binary operations.][45435]
1739 Which should fix some confusing errors in some operations.
1743 - [Enabled `TrapUnreachable` in LLVM which should mitigate the impact of
1744 undefined behavior.][45920]
1745 - [rustc now suggests renaming import if names clash.][45660]
1746 - [Display errors/warnings correctly when there are zero-width or
1747 wide characters.][45711]
1748 - [rustc now avoids unnecessary copies of arguments that are
1749 simple bindings][45380] This should improve memory usage on average by 5-10%.
1750 - [Updated musl used to build musl rustc to 1.1.17][45393]
1754 - [Allow a trailing comma in `assert_eq/ne` macro][45887]
1755 - [Implement Hash for raw pointers to unsized types][45483]
1756 - [impl `From<*mut T>` for `AtomicPtr<T>`][45610]
1757 - [impl `From<usize/isize>` for `AtomicUsize/AtomicIsize`.][45610]
1758 - [Removed the `T: Sync` requirement for `RwLock<T>: Send`][45267]
1759 - [Removed `T: Sized` requirement for `{<*const T>, <*mut T>}::as_ref`
1760 and `<*mut T>::as_mut`][44932]
1761 - [Optimized `Thread::{park, unpark}` implementation][45524]
1762 - [Improved `SliceExt::binary_search` performance.][45333]
1763 - [impl `FromIterator<()>` for `()`][45379]
1764 - [Copied `AsciiExt` trait methods to primitive types.][44042] Use of `AsciiExt`
1772 - [Cargo now supports uninstallation of multiple packages][cargo/4561]
1773 eg. `cargo uninstall foo bar` uninstalls `foo` and `bar`.
1774 - [Added unit test checking to `cargo check`][cargo/4592]
1775 - [Cargo now lets you install a specific version
1776 using `cargo install --version`][cargo/4637]
1780 - [Releases now ship with the Cargo book documentation.][45692]
1781 - [rustdoc now prints rendering warnings on every run.][45324]
1785 - [Changes have been made to type equality to make it more correct,
1786 in rare cases this could break some code.][45853] [Tracking issue for
1787 further information][45852]
1788 - [`char::escape_debug` now uses Unicode 10 over 9.][45571]
1789 - [Upgraded Android SDK to 27, and NDK to r15c.][45580] This drops support for
1790 Android 9, the minimum supported version is Android 14.
1791 - [Bumped the minimum LLVM to 3.9][45326]
1793 [44042]: https://github.com/rust-lang/rust/pull/44042
1794 [44932]: https://github.com/rust-lang/rust/pull/44932
1795 [45267]: https://github.com/rust-lang/rust/pull/45267
1796 [45324]: https://github.com/rust-lang/rust/pull/45324
1797 [45326]: https://github.com/rust-lang/rust/pull/45326
1798 [45333]: https://github.com/rust-lang/rust/pull/45333
1799 [45379]: https://github.com/rust-lang/rust/pull/45379
1800 [45380]: https://github.com/rust-lang/rust/pull/45380
1801 [45393]: https://github.com/rust-lang/rust/pull/45393
1802 [45435]: https://github.com/rust-lang/rust/pull/45435
1803 [45483]: https://github.com/rust-lang/rust/pull/45483
1804 [45524]: https://github.com/rust-lang/rust/pull/45524
1805 [45571]: https://github.com/rust-lang/rust/pull/45571
1806 [45580]: https://github.com/rust-lang/rust/pull/45580
1807 [45610]: https://github.com/rust-lang/rust/pull/45610
1808 [45660]: https://github.com/rust-lang/rust/pull/45660
1809 [45692]: https://github.com/rust-lang/rust/pull/45692
1810 [45711]: https://github.com/rust-lang/rust/pull/45711
1811 [45772]: https://github.com/rust-lang/rust/pull/45772
1812 [45852]: https://github.com/rust-lang/rust/issues/45852
1813 [45853]: https://github.com/rust-lang/rust/pull/45853
1814 [45887]: https://github.com/rust-lang/rust/pull/45887
1815 [45920]: https://github.com/rust-lang/rust/pull/45920
1816 [cargo/4561]: https://github.com/rust-lang/cargo/pull/4561
1817 [cargo/4592]: https://github.com/rust-lang/cargo/pull/4592
1818 [cargo/4637]: https://github.com/rust-lang/cargo/pull/4637
1821 Version 1.22.1 (2017-11-22)
1822 ==========================
1824 - [Update Cargo to fix an issue with macOS 10.13 "High Sierra"][46183]
1826 [46183]: https://github.com/rust-lang/rust/pull/46183
1828 Version 1.22.0 (2017-11-22)
1829 ==========================
1833 - [`non_snake_case` lint now allows extern no-mangle functions][44966]
1834 - [Now accepts underscores in unicode escapes][43716]
1835 - [`T op= &T` now works for numeric types.][44287] eg. `let mut x = 2; x += &8;`
1836 - [types that impl `Drop` are now allowed in `const` and `static` types][44456]
1840 - [rustc now defaults to having 16 codegen units at debug on supported platforms.][45064]
1841 - [rustc will no longer inline in codegen units when compiling for debug][45075]
1842 This should decrease compile times for debug builds.
1843 - [strict memory alignment now enabled on ARMv6][45094]
1844 - [Remove support for the PNaCl target `le32-unknown-nacl`][45041]
1848 - [Allow atomic operations up to 32 bits
1849 on `armv5te_unknown_linux_gnueabi`][44978]
1850 - [`Box<Error>` now impls `From<Cow<str>>`][44466]
1851 - [`std::mem::Discriminant` is now guaranteed to be `Send + Sync`][45095]
1852 - [`fs::copy` now returns the length of the main stream on NTFS.][44895]
1853 - [Properly detect overflow in `Instant += Duration`.][44220]
1854 - [impl `Hasher` for `{&mut Hasher, Box<Hasher>}`][44015]
1855 - [impl `fmt::Debug` for `SplitWhitespace`.][44303]
1856 - [`Option<T>` now impls `Try`][42526] This allows for using `?` with `Option` types.
1863 - [Cargo will now build multi file examples in subdirectories of the `examples`
1864 folder that have a `main.rs` file.][cargo/4496]
1865 - [Changed `[root]` to `[package]` in `Cargo.lock`][cargo/4571] Packages with
1866 the old format will continue to work and can be updated with `cargo update`.
1867 - [Now supports vendoring git repositories][cargo/3992]
1871 - [`libbacktrace` is now available on Apple platforms.][44251]
1872 - [Stabilised the `compile_fail` attribute for code fences in doc-comments.][43949]
1873 This now lets you specify that a given code example will fail to compile.
1877 - [The minimum Android version that rustc can build for has been bumped
1878 to `4.0` from `2.3`][45656]
1879 - [Allowing `T op= &T` for numeric types has broken some type
1880 inference cases][45480]
1883 [42526]: https://github.com/rust-lang/rust/pull/42526
1884 [43017]: https://github.com/rust-lang/rust/pull/43017
1885 [43716]: https://github.com/rust-lang/rust/pull/43716
1886 [43949]: https://github.com/rust-lang/rust/pull/43949
1887 [44015]: https://github.com/rust-lang/rust/pull/44015
1888 [44220]: https://github.com/rust-lang/rust/pull/44220
1889 [44251]: https://github.com/rust-lang/rust/pull/44251
1890 [44287]: https://github.com/rust-lang/rust/pull/44287
1891 [44303]: https://github.com/rust-lang/rust/pull/44303
1892 [44456]: https://github.com/rust-lang/rust/pull/44456
1893 [44466]: https://github.com/rust-lang/rust/pull/44466
1894 [44895]: https://github.com/rust-lang/rust/pull/44895
1895 [44966]: https://github.com/rust-lang/rust/pull/44966
1896 [44978]: https://github.com/rust-lang/rust/pull/44978
1897 [45041]: https://github.com/rust-lang/rust/pull/45041
1898 [45064]: https://github.com/rust-lang/rust/pull/45064
1899 [45075]: https://github.com/rust-lang/rust/pull/45075
1900 [45094]: https://github.com/rust-lang/rust/pull/45094
1901 [45095]: https://github.com/rust-lang/rust/pull/45095
1902 [45480]: https://github.com/rust-lang/rust/issues/45480
1903 [45656]: https://github.com/rust-lang/rust/pull/45656
1904 [cargo/3992]: https://github.com/rust-lang/cargo/pull/3992
1905 [cargo/4496]: https://github.com/rust-lang/cargo/pull/4496
1906 [cargo/4571]: https://github.com/rust-lang/cargo/pull/4571
1913 Version 1.21.0 (2017-10-12)
1914 ==========================
1918 - [You can now use static references for literals.][43838]
1922 let x: &'static u32 = &0;
1925 - [Relaxed path syntax. Optional `::` before `<` is now allowed in all contexts.][43540]
1928 my_macro!(Vec<i32>::new); // Always worked
1929 my_macro!(Vec::<i32>::new); // Now works
1934 - [Upgraded jemalloc to 4.5.0][43911]
1935 - [Enabled unwinding panics on Redox][43917]
1936 - [Now runs LLVM in parallel during translation phase.][43506]
1937 This should reduce peak memory usage.
1941 - [Generate builtin impls for `Clone` for all arrays and tuples that
1942 are `T: Clone`][43690]
1943 - [`Stdin`, `Stdout`, and `Stderr` now implement `AsRawFd`.][43459]
1944 - [`Rc` and `Arc` now implement `From<&[T]> where T: Clone`, `From<str>`,
1945 `From<String>`, `From<Box<T>> where T: ?Sized`, and `From<Vec<T>>`.][42565]
1950 [`std::mem::discriminant`]
1954 - [You can now call `cargo install` with multiple package names][cargo/4216]
1955 - [Cargo commands inside a virtual workspace will now implicitly
1956 pass `--all`][cargo/4335]
1957 - [Added a `[patch]` section to `Cargo.toml` to handle
1958 prepublication dependencies][cargo/4123] [RFC 1969]
1959 - [`include` & `exclude` fields in `Cargo.toml` now accept gitignore
1960 like patterns][cargo/4270]
1961 - [Added the `--all-targets` option][cargo/4400]
1962 - [Using required dependencies as a feature is now deprecated and emits
1963 a warning][cargo/4364]
1968 - [Cargo docs are moving][43916]
1969 to [doc.rust-lang.org/cargo](https://doc.rust-lang.org/cargo)
1970 - [The rustdoc book is now available][43863]
1971 at [doc.rust-lang.org/rustdoc](https://doc.rust-lang.org/rustdoc)
1972 - [Added a preview of RLS has been made available through rustup][44204]
1973 Install with `rustup component add rls-preview`
1974 - [`std::os` documentation for Unix, Linux, and Windows now appears on doc.rust-lang.org][43348]
1975 Previously only showed `std::os::unix`.
1979 - [Changes in method matching against higher-ranked types][43880] This may cause
1980 breakage in subtyping corner cases. [A more in-depth explanation is available.][info/43880]
1981 - [rustc's JSON error output's byte position start at top of file.][42973]
1982 Was previously relative to the rustc's internal `CodeMap` struct which
1983 required the unstable library `libsyntax` to correctly use.
1984 - [`unused_results` lint no longer ignores booleans][43728]
1986 [42565]: https://github.com/rust-lang/rust/pull/42565
1987 [42973]: https://github.com/rust-lang/rust/pull/42973
1988 [43348]: https://github.com/rust-lang/rust/pull/43348
1989 [43459]: https://github.com/rust-lang/rust/pull/43459
1990 [43506]: https://github.com/rust-lang/rust/pull/43506
1991 [43540]: https://github.com/rust-lang/rust/pull/43540
1992 [43690]: https://github.com/rust-lang/rust/pull/43690
1993 [43728]: https://github.com/rust-lang/rust/pull/43728
1994 [43838]: https://github.com/rust-lang/rust/pull/43838
1995 [43863]: https://github.com/rust-lang/rust/pull/43863
1996 [43880]: https://github.com/rust-lang/rust/pull/43880
1997 [43911]: https://github.com/rust-lang/rust/pull/43911
1998 [43916]: https://github.com/rust-lang/rust/pull/43916
1999 [43917]: https://github.com/rust-lang/rust/pull/43917
2000 [44204]: https://github.com/rust-lang/rust/pull/44204
2001 [cargo/4123]: https://github.com/rust-lang/cargo/pull/4123
2002 [cargo/4216]: https://github.com/rust-lang/cargo/pull/4216
2003 [cargo/4270]: https://github.com/rust-lang/cargo/pull/4270
2004 [cargo/4335]: https://github.com/rust-lang/cargo/pull/4335
2005 [cargo/4364]: https://github.com/rust-lang/cargo/pull/4364
2006 [cargo/4400]: https://github.com/rust-lang/cargo/pull/4400
2007 [RFC 1969]: https://github.com/rust-lang/rfcs/pull/1969
2008 [info/43880]: https://github.com/rust-lang/rust/issues/44224#issuecomment-330058902
2009 [`std::mem::discriminant`]: https://doc.rust-lang.org/std/mem/fn.discriminant.html
2011 Version 1.20.0 (2017-08-31)
2012 ===========================
2016 - [Associated constants are now stabilised.][42809]
2017 - [A lot of macro bugs are now fixed.][42913]
2022 - [Struct fields are now properly coerced to the expected field type.][42807]
2023 - [Enabled wasm LLVM backend][42571] WASM can now be built with the
2024 `wasm32-experimental-emscripten` target.
2025 - [Changed some of the error messages to be more helpful.][42033]
2026 - [Add support for RELRO(RELocation Read-Only) for platforms that support
2028 - [rustc now reports the total number of errors on compilation failure][43015]
2029 previously this was only the number of errors in the pass that failed.
2030 - [Expansion in rustc has been sped up 29x.][42533]
2031 - [added `msp430-none-elf` target.][43099]
2032 - [rustc will now suggest one-argument enum variant to fix type mismatch when
2034 - [Fixes backtraces on Redox][43228]
2035 - [rustc now identifies different versions of same crate when absolute paths of
2036 different types match in an error message.][42826]
2042 - [Relaxed Debug constraints on `{HashMap,BTreeMap}::{Keys,Values}`.][42854]
2043 - [Impl `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Debug`, `Hash` for unsized
2045 - [Impl `fmt::{Display, Debug}` for `Ref`, `RefMut`, `MutexGuard`,
2046 `RwLockReadGuard`, `RwLockWriteGuard`][42822]
2047 - [Impl `Clone` for `DefaultHasher`.][42799]
2048 - [Impl `Sync` for `SyncSender`.][42397]
2049 - [Impl `FromStr` for `char`][42271]
2050 - [Fixed how `{f32, f64}::{is_sign_negative, is_sign_positive}` handles
2052 - [allow messages in the `unimplemented!()` macro.][42155]
2053 ie. `unimplemented!("Waiting for 1.21 to be stable")`
2054 - [`pub(restricted)` is now supported in the `thread_local!` macro.][43185]
2055 - [Upgrade to Unicode 10.0.0][42999]
2056 - [Reimplemented `{f32, f64}::{min, max}` in Rust instead of using CMath.][42430]
2057 - [Skip the main thread's manual stack guard on Linux][43072]
2058 - [Iterator::nth for `ops::{Range, RangeFrom}` is now done in O(1) time][43077]
2059 - [`#[repr(align(N))]` attribute max number is now 2^31 - 1.][43097] This was
2061 - [`{OsStr, Path}::Display` now avoids allocations where possible][42613]
2066 - [`CStr::into_c_string`]
2067 - [`CString::as_c_str`]
2068 - [`CString::into_boxed_c_str`]
2069 - [`Chain::get_mut`]
2070 - [`Chain::get_ref`]
2071 - [`Chain::into_inner`]
2072 - [`Option::get_or_insert_with`]
2073 - [`Option::get_or_insert`]
2074 - [`OsStr::into_os_string`]
2075 - [`OsString::into_boxed_os_str`]
2078 - [`Utf8Error::error_len`]
2079 - [`char::EscapeDebug`]
2080 - [`char::escape_debug`]
2081 - [`compile_error!`]
2082 - [`f32::from_bits`]
2084 - [`f64::from_bits`]
2086 - [`mem::ManuallyDrop`]
2087 - [`slice::sort_unstable_by_key`]
2088 - [`slice::sort_unstable_by`]
2089 - [`slice::sort_unstable`]
2090 - [`str::from_boxed_utf8_unchecked`]
2091 - [`str::as_bytes_mut`]
2092 - [`str::as_bytes_mut`]
2093 - [`str::from_utf8_mut`]
2094 - [`str::from_utf8_unchecked_mut`]
2096 - [`str::get_unchecked_mut`]
2097 - [`str::get_unchecked`]
2099 - [`str::into_boxed_bytes`]
2104 - [Cargo API token location moved from `~/.cargo/config` to
2105 `~/.cargo/credentials`.][cargo/3978]
2106 - [Cargo will now build `main.rs` binaries that are in sub-directories of
2107 `src/bin`.][cargo/4214] ie. Having `src/bin/server/main.rs` and
2108 `src/bin/client/main.rs` generates `target/debug/server` and `target/debug/client`
2109 - [You can now specify version of a binary when installed through
2110 `cargo install` using `--vers`.][cargo/4229]
2111 - [Added `--no-fail-fast` flag to cargo to run all benchmarks regardless of
2112 failure.][cargo/4248]
2113 - [Changed the convention around which file is the crate root.][cargo/4259]
2114 - [The `include`/`exclude` property in `Cargo.toml` now accepts gitignore paths
2115 instead of glob patterns][cargo/4270]. Glob patterns are now deprecated.
2120 - [Functions with `'static` in their return types will now not be as usable as
2121 if they were using lifetime parameters instead.][42417]
2122 - [The reimplementation of `{f32, f64}::is_sign_{negative, positive}` now
2123 takes the sign of NaN into account where previously didn't.][42430]
2125 [42033]: https://github.com/rust-lang/rust/pull/42033
2126 [42155]: https://github.com/rust-lang/rust/pull/42155
2127 [42271]: https://github.com/rust-lang/rust/pull/42271
2128 [42397]: https://github.com/rust-lang/rust/pull/42397
2129 [42417]: https://github.com/rust-lang/rust/pull/42417
2130 [42430]: https://github.com/rust-lang/rust/pull/42430
2131 [42431]: https://github.com/rust-lang/rust/pull/42431
2132 [42533]: https://github.com/rust-lang/rust/pull/42533
2133 [42571]: https://github.com/rust-lang/rust/pull/42571
2134 [42613]: https://github.com/rust-lang/rust/pull/42613
2135 [42799]: https://github.com/rust-lang/rust/pull/42799
2136 [42807]: https://github.com/rust-lang/rust/pull/42807
2137 [42809]: https://github.com/rust-lang/rust/pull/42809
2138 [42822]: https://github.com/rust-lang/rust/pull/42822
2139 [42826]: https://github.com/rust-lang/rust/pull/42826
2140 [42854]: https://github.com/rust-lang/rust/pull/42854
2141 [42913]: https://github.com/rust-lang/rust/pull/42913
2142 [42999]: https://github.com/rust-lang/rust/pull/42999
2143 [43011]: https://github.com/rust-lang/rust/pull/43011
2144 [43015]: https://github.com/rust-lang/rust/pull/43015
2145 [43072]: https://github.com/rust-lang/rust/pull/43072
2146 [43077]: https://github.com/rust-lang/rust/pull/43077
2147 [43097]: https://github.com/rust-lang/rust/pull/43097
2148 [43099]: https://github.com/rust-lang/rust/pull/43099
2149 [43170]: https://github.com/rust-lang/rust/pull/43170
2150 [43178]: https://github.com/rust-lang/rust/pull/43178
2151 [43185]: https://github.com/rust-lang/rust/pull/43185
2152 [43228]: https://github.com/rust-lang/rust/pull/43228
2153 [cargo/3978]: https://github.com/rust-lang/cargo/pull/3978
2154 [cargo/4214]: https://github.com/rust-lang/cargo/pull/4214
2155 [cargo/4229]: https://github.com/rust-lang/cargo/pull/4229
2156 [cargo/4248]: https://github.com/rust-lang/cargo/pull/4248
2157 [cargo/4259]: https://github.com/rust-lang/cargo/pull/4259
2158 [cargo/4270]: https://github.com/rust-lang/cargo/pull/4270
2159 [`CStr::into_c_string`]: https://doc.rust-lang.org/std/ffi/struct.CStr.html#method.into_c_string
2160 [`CString::as_c_str`]: https://doc.rust-lang.org/std/ffi/struct.CString.html#method.as_c_str
2161 [`CString::into_boxed_c_str`]: https://doc.rust-lang.org/std/ffi/struct.CString.html#method.into_boxed_c_str
2162 [`Chain::get_mut`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.get_mut
2163 [`Chain::get_ref`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.get_ref
2164 [`Chain::into_inner`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.into_inner
2165 [`Option::get_or_insert_with`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.get_or_insert_with
2166 [`Option::get_or_insert`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.get_or_insert
2167 [`OsStr::into_os_string`]: https://doc.rust-lang.org/std/ffi/struct.OsStr.html#method.into_os_string
2168 [`OsString::into_boxed_os_str`]: https://doc.rust-lang.org/std/ffi/struct.OsString.html#method.into_boxed_os_str
2169 [`Take::get_mut`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.get_mut
2170 [`Take::get_ref`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.get_ref
2171 [`Utf8Error::error_len`]: https://doc.rust-lang.org/std/str/struct.Utf8Error.html#method.error_len
2172 [`char::EscapeDebug`]: https://doc.rust-lang.org/std/char/struct.EscapeDebug.html
2173 [`char::escape_debug`]: https://doc.rust-lang.org/std/primitive.char.html#method.escape_debug
2174 [`compile_error!`]: https://doc.rust-lang.org/std/macro.compile_error.html
2175 [`f32::from_bits`]: https://doc.rust-lang.org/std/primitive.f32.html#method.from_bits
2176 [`f32::to_bits`]: https://doc.rust-lang.org/std/primitive.f32.html#method.to_bits
2177 [`f64::from_bits`]: https://doc.rust-lang.org/std/primitive.f64.html#method.from_bits
2178 [`f64::to_bits`]: https://doc.rust-lang.org/std/primitive.f64.html#method.to_bits
2179 [`mem::ManuallyDrop`]: https://doc.rust-lang.org/std/mem/union.ManuallyDrop.html
2180 [`slice::sort_unstable_by_key`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable_by_key
2181 [`slice::sort_unstable_by`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable_by
2182 [`slice::sort_unstable`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable
2183 [`str::from_boxed_utf8_unchecked`]: https://doc.rust-lang.org/std/str/fn.from_boxed_utf8_unchecked.html
2184 [`str::as_bytes_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.as_bytes_mut
2185 [`str::from_utf8_mut`]: https://doc.rust-lang.org/std/str/fn.from_utf8_mut.html
2186 [`str::from_utf8_unchecked_mut`]: https://doc.rust-lang.org/std/str/fn.from_utf8_unchecked_mut.html
2187 [`str::get_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_mut
2188 [`str::get_unchecked_mut`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_unchecked_mut
2189 [`str::get_unchecked`]: https://doc.rust-lang.org/std/primitive.str.html#method.get_unchecked
2190 [`str::get`]: https://doc.rust-lang.org/std/primitive.str.html#method.get
2191 [`str::into_boxed_bytes`]: https://doc.rust-lang.org/std/primitive.str.html#method.into_boxed_bytes
2194 Version 1.19.0 (2017-07-20)
2195 ===========================
2200 - [Numeric fields can now be used for creating tuple structs.][41145] [RFC 1506]
2201 For example `struct Point(u32, u32); let x = Point { 0: 7, 1: 0 };`.
2202 - [Macro recursion limit increased to 1024 from 64.][41676]
2203 - [Added lint for detecting unused macros.][41907]
2204 - [`loop` can now return a value with `break`.][42016] [RFC 1624]
2205 For example: `let x = loop { break 7; };`
2206 - [C compatible `union`s are now available.][42068] [RFC 1444] They can only
2207 contain `Copy` types and cannot have a `Drop` implementation.
2208 Example: `union Foo { bar: u8, baz: usize }`
2209 - [Non capturing closures can now be coerced into `fn`s,][42162] [RFC 1558]
2210 Example: `let foo: fn(u8) -> u8 = |v: u8| { v };`
2215 - [Add support for bootstrapping the Rust compiler toolchain on Android.][41370]
2216 - [Change `arm-linux-androideabi` to correspond to the `armeabi`
2217 official ABI.][41656] If you wish to continue targeting the `armeabi-v7a` ABI
2218 you should use `--target armv7-linux-androideabi`.
2219 - [Fixed ICE when removing a source file between compilation sessions.][41873]
2220 - [Minor optimisation of string operations.][42037]
2221 - [Compiler error message is now `aborting due to previous error(s)` instead of
2222 `aborting due to N previous errors`][42150] This was previously inaccurate and
2223 would only count certain kinds of errors.
2224 - [The compiler now supports Visual Studio 2017][42225]
2225 - [The compiler is now built against LLVM 4.0.1 by default][42948]
2226 - [Added a lot][42264] of [new error codes][42302]
2227 - [Added `target-feature=+crt-static` option][37406] [RFC 1721] Which allows
2228 libraries with C Run-time Libraries(CRT) to be statically linked.
2229 - [Fixed various ARM codegen bugs][42740]
2234 - [`String` now implements `FromIterator<Cow<'a, str>>` and
2235 `Extend<Cow<'a, str>>`][41449]
2236 - [`Vec` now implements `From<&mut [T]>`][41530]
2237 - [`Box<[u8]>` now implements `From<Box<str>>`][41258]
2238 - [`SplitWhitespace` now implements `Clone`][41659]
2239 - [`[u8]::reverse` is now 5x faster and `[u16]::reverse` is now
2241 - [`eprint!` and `eprintln!` macros added to prelude.][41192] Same as the `print!`
2242 macros, but for printing to stderr.
2247 - [`OsString::shrink_to_fit`]
2250 - [`thread::ThreadId`]
2255 - [Build scripts can now add environment variables to the environment
2256 the crate is being compiled in.
2257 Example: `println!("cargo:rustc-env=FOO=bar");`][cargo/3929]
2258 - [Subcommands now replace the current process rather than spawning a new
2259 child process][cargo/3970]
2260 - [Workspace members can now accept glob file patterns][cargo/3979]
2261 - [Added `--all` flag to the `cargo bench` subcommand to run benchmarks of all
2262 the members in a given workspace.][cargo/3988]
2263 - [Updated `libssh2-sys` to 0.2.6][cargo/4008]
2264 - [Target directory path is now in the cargo metadata][cargo/4022]
2265 - [Cargo no longer checks out a local working directory for the
2266 crates.io index][cargo/4026] This should provide smaller file size for the
2267 registry, and improve cloning times, especially on Windows machines.
2268 - [Added an `--exclude` option for excluding certain packages when using the
2269 `--all` option][cargo/4031]
2270 - [Cargo will now automatically retry when receiving a 5xx error
2271 from crates.io][cargo/4032]
2272 - [The `--features` option now accepts multiple comma or space
2273 delimited values.][cargo/4084]
2274 - [Added support for custom target specific runners][cargo/3954]
2279 - [Added `rust-windbg.cmd`][39983] for loading rust `.natvis` files in the
2281 - [Rust will now release XZ compressed packages][rust-installer/57]
2282 - [rustup will now prefer to download rust packages with
2283 XZ compression][rustup/1100] over GZip packages.
2284 - [Added the ability to escape `#` in rust documentation][41785] By adding
2285 additional `#`'s ie. `##` is now `#`
2290 - [`MutexGuard<T>` may only be `Sync` if `T` is `Sync`.][41624]
2291 - [`-Z` flags are now no longer allowed to be used on the stable
2292 compiler.][41751] This has been a warning for a year previous to this.
2293 - [As a result of the `-Z` flag change, the `cargo-check` plugin no
2294 longer works][42844]. Users should migrate to the built-in `check`
2295 command, which has been available since 1.16.
2296 - [Ending a float literal with `._` is now a hard error.
2297 Example: `42._` .][41946]
2298 - [Any use of a private `extern crate` outside of its module is now a
2299 hard error.][36886] This was previously a warning.
2300 - [`use ::self::foo;` is now a hard error.][36888] `self` paths are always
2301 relative while the `::` prefix makes a path absolute, but was ignored and the
2302 path was relative regardless.
2303 - [Floating point constants in match patterns is now a hard error][36890]
2304 This was previously a warning.
2305 - [Struct or enum constants that don't derive `PartialEq` & `Eq` used
2306 match patterns is now a hard error][36891] This was previously a warning.
2307 - [Lifetimes named `'_` are no longer allowed.][36892] This was previously
2309 - [From the pound escape, lines consisting of multiple `#`s are
2311 - [It is an error to re-export private enum variants][42460]. This is
2312 known to break a number of crates that depend on an older version of
2314 - [On Windows, if `VCINSTALLDIR` is set incorrectly, `rustc` will try
2315 to use it to find the linker, and the build will fail where it did
2316 not previously][42607]
2318 [36886]: https://github.com/rust-lang/rust/issues/36886
2319 [36888]: https://github.com/rust-lang/rust/issues/36888
2320 [36890]: https://github.com/rust-lang/rust/issues/36890
2321 [36891]: https://github.com/rust-lang/rust/issues/36891
2322 [36892]: https://github.com/rust-lang/rust/issues/36892
2323 [37406]: https://github.com/rust-lang/rust/issues/37406
2324 [39983]: https://github.com/rust-lang/rust/pull/39983
2325 [41145]: https://github.com/rust-lang/rust/pull/41145
2326 [41192]: https://github.com/rust-lang/rust/pull/41192
2327 [41258]: https://github.com/rust-lang/rust/pull/41258
2328 [41370]: https://github.com/rust-lang/rust/pull/41370
2329 [41449]: https://github.com/rust-lang/rust/pull/41449
2330 [41530]: https://github.com/rust-lang/rust/pull/41530
2331 [41624]: https://github.com/rust-lang/rust/pull/41624
2332 [41656]: https://github.com/rust-lang/rust/pull/41656
2333 [41659]: https://github.com/rust-lang/rust/pull/41659
2334 [41676]: https://github.com/rust-lang/rust/pull/41676
2335 [41751]: https://github.com/rust-lang/rust/pull/41751
2336 [41764]: https://github.com/rust-lang/rust/pull/41764
2337 [41785]: https://github.com/rust-lang/rust/pull/41785
2338 [41873]: https://github.com/rust-lang/rust/pull/41873
2339 [41907]: https://github.com/rust-lang/rust/pull/41907
2340 [41946]: https://github.com/rust-lang/rust/pull/41946
2341 [42016]: https://github.com/rust-lang/rust/pull/42016
2342 [42037]: https://github.com/rust-lang/rust/pull/42037
2343 [42068]: https://github.com/rust-lang/rust/pull/42068
2344 [42150]: https://github.com/rust-lang/rust/pull/42150
2345 [42162]: https://github.com/rust-lang/rust/pull/42162
2346 [42225]: https://github.com/rust-lang/rust/pull/42225
2347 [42264]: https://github.com/rust-lang/rust/pull/42264
2348 [42302]: https://github.com/rust-lang/rust/pull/42302
2349 [42460]: https://github.com/rust-lang/rust/issues/42460
2350 [42607]: https://github.com/rust-lang/rust/issues/42607
2351 [42740]: https://github.com/rust-lang/rust/pull/42740
2352 [42844]: https://github.com/rust-lang/rust/issues/42844
2353 [42948]: https://github.com/rust-lang/rust/pull/42948
2354 [RFC 1444]: https://github.com/rust-lang/rfcs/pull/1444
2355 [RFC 1506]: https://github.com/rust-lang/rfcs/pull/1506
2356 [RFC 1558]: https://github.com/rust-lang/rfcs/pull/1558
2357 [RFC 1624]: https://github.com/rust-lang/rfcs/pull/1624
2358 [RFC 1721]: https://github.com/rust-lang/rfcs/pull/1721
2359 [`Command::envs`]: https://doc.rust-lang.org/std/process/struct.Command.html#method.envs
2360 [`OsString::shrink_to_fit`]: https://doc.rust-lang.org/std/ffi/struct.OsString.html#method.shrink_to_fit
2361 [`cmp::Reverse`]: https://doc.rust-lang.org/std/cmp/struct.Reverse.html
2362 [`thread::ThreadId`]: https://doc.rust-lang.org/std/thread/struct.ThreadId.html
2363 [cargo/3929]: https://github.com/rust-lang/cargo/pull/3929
2364 [cargo/3954]: https://github.com/rust-lang/cargo/pull/3954
2365 [cargo/3970]: https://github.com/rust-lang/cargo/pull/3970
2366 [cargo/3979]: https://github.com/rust-lang/cargo/pull/3979
2367 [cargo/3988]: https://github.com/rust-lang/cargo/pull/3988
2368 [cargo/4008]: https://github.com/rust-lang/cargo/pull/4008
2369 [cargo/4022]: https://github.com/rust-lang/cargo/pull/4022
2370 [cargo/4026]: https://github.com/rust-lang/cargo/pull/4026
2371 [cargo/4031]: https://github.com/rust-lang/cargo/pull/4031
2372 [cargo/4032]: https://github.com/rust-lang/cargo/pull/4032
2373 [cargo/4084]: https://github.com/rust-lang/cargo/pull/4084
2374 [rust-installer/57]: https://github.com/rust-lang/rust-installer/pull/57
2375 [rustup/1100]: https://github.com/rust-lang-nursery/rustup.rs/pull/1100
2378 Version 1.18.0 (2017-06-08)
2379 ===========================
2384 - [Stabilize pub(restricted)][40556] `pub` can now accept a module path to
2385 make the item visible to just that module tree. Also accepts the keyword
2386 `crate` to make something public to the whole crate but not users of the
2387 library. Example: `pub(crate) mod utils;`. [RFC 1422].
2388 - [Stabilize `#![windows_subsystem]` attribute][40870] conservative exposure of the
2389 `/SUBSYSTEM` linker flag on Windows platforms. [RFC 1665].
2390 - [Refactor of trait object type parsing][40043] Now `ty` in macros can accept
2391 types like `Write + Send`, trailing `+` are now supported in trait objects,
2392 and better error reporting for trait objects starting with `?Sized`.
2393 - [0e+10 is now a valid floating point literal][40589]
2394 - [Now warns if you bind a lifetime parameter to 'static][40734]
2395 - [Tuples, Enum variant fields, and structs with no `repr` attribute or with
2396 `#[repr(Rust)]` are reordered to minimize padding and produce a smaller
2397 representation in some cases.][40377]
2402 - [rustc can now emit mir with `--emit mir`][39891]
2403 - [Improved LLVM IR for trivial functions][40367]
2404 - [Added explanation for E0090(Wrong number of lifetimes are supplied)][40723]
2405 - [rustc compilation is now 15%-20% faster][41469] Thanks to optimisation
2406 opportunities found through profiling
2407 - [Improved backtrace formatting when panicking][38165]
2412 - [Specialized `Vec::from_iter` being passed `vec::IntoIter`][40731] if the
2413 iterator hasn't been advanced the original `Vec` is reassembled with no actual
2414 iteration or reallocation.
2415 - [Simplified HashMap Bucket interface][40561] provides performance
2416 improvements for iterating and cloning.
2417 - [Specialize Vec::from_elem to use calloc][40409]
2418 - [Fixed Race condition in fs::create_dir_all][39799]
2419 - [No longer caching stdio on Windows][40516]
2420 - [Optimized insertion sort in slice][40807] insertion sort in some cases
2421 2.50%~ faster and in one case now 12.50% faster.
2422 - [Optimized `AtomicBool::fetch_nand`][41143]
2427 - [`Child::try_wait`]
2428 - [`HashMap::retain`]
2429 - [`HashSet::retain`]
2431 - [`TcpStream::peek`]
2432 - [`UdpSocket::peek`]
2433 - [`UdpSocket::peek_from`]
2438 - [Added partial Pijul support][cargo/3842] Pijul is a version control system in Rust.
2439 You can now create new cargo projects with Pijul using `cargo new --vcs pijul`
2440 - [Now always emits build script warnings for crates that fail to build][cargo/3847]
2441 - [Added Android build support][cargo/3885]
2442 - [Added `--bins` and `--tests` flags][cargo/3901] now you can build all programs
2443 of a certain type, for example `cargo build --bins` will build all
2445 - [Added support for haiku][cargo/3952]
2450 - [rustdoc can now use pulldown-cmark with the `--enable-commonmark` flag][40338]
2451 - [Added rust-windbg script for better debugging on Windows][39983]
2452 - [Rust now uses the official cross compiler for NetBSD][40612]
2453 - [rustdoc now accepts `#` at the start of files][40828]
2454 - [Fixed jemalloc support for musl][41168]
2459 - [Changes to how the `0` flag works in format!][40241] Padding zeroes are now
2460 always placed after the sign if it exists and before the digits. With the `#`
2461 flag the zeroes are placed after the prefix and before the digits.
2462 - [Due to the struct field optimisation][40377], using `transmute` on structs
2463 that have no `repr` attribute or `#[repr(Rust)]` will no longer work. This has
2464 always been undefined behavior, but is now more likely to break in practice.
2465 - [The refactor of trait object type parsing][40043] fixed a bug where `+` was
2466 receiving the wrong priority parsing things like `&for<'a> Tr<'a> + Send` as
2467 `&(for<'a> Tr<'a> + Send)` instead of `(&for<'a> Tr<'a>) + Send`
2468 - [Overlapping inherent `impl`s are now a hard error][40728]
2469 - [`PartialOrd` and `Ord` must agree on the ordering.][41270]
2470 - [`rustc main.rs -o out --emit=asm,llvm-ir`][41085] Now will output
2471 `out.asm` and `out.ll` instead of only one of the filetypes.
2472 - [ calling a function that returns `Self` will no longer work][41805] when
2473 the size of `Self` cannot be statically determined.
2474 - [rustc now builds with a "pthreads" flavour of MinGW for Windows GNU][40805]
2475 this has caused a few regressions namely:
2477 - Changed the link order of local static/dynamic libraries (respecting the
2478 order on given rather than having the compiler reorder).
2479 - Changed how MinGW is linked, native code linked to dynamic libraries
2480 may require manually linking to the gcc support library (for the native
2483 [38165]: https://github.com/rust-lang/rust/pull/38165
2484 [39799]: https://github.com/rust-lang/rust/pull/39799
2485 [39891]: https://github.com/rust-lang/rust/pull/39891
2486 [39983]: https://github.com/rust-lang/rust/pull/39983
2487 [40043]: https://github.com/rust-lang/rust/pull/40043
2488 [40241]: https://github.com/rust-lang/rust/pull/40241
2489 [40338]: https://github.com/rust-lang/rust/pull/40338
2490 [40367]: https://github.com/rust-lang/rust/pull/40367
2491 [40377]: https://github.com/rust-lang/rust/pull/40377
2492 [40409]: https://github.com/rust-lang/rust/pull/40409
2493 [40516]: https://github.com/rust-lang/rust/pull/40516
2494 [40556]: https://github.com/rust-lang/rust/pull/40556
2495 [40561]: https://github.com/rust-lang/rust/pull/40561
2496 [40589]: https://github.com/rust-lang/rust/pull/40589
2497 [40612]: https://github.com/rust-lang/rust/pull/40612
2498 [40723]: https://github.com/rust-lang/rust/pull/40723
2499 [40728]: https://github.com/rust-lang/rust/pull/40728
2500 [40731]: https://github.com/rust-lang/rust/pull/40731
2501 [40734]: https://github.com/rust-lang/rust/pull/40734
2502 [40805]: https://github.com/rust-lang/rust/pull/40805
2503 [40807]: https://github.com/rust-lang/rust/pull/40807
2504 [40828]: https://github.com/rust-lang/rust/pull/40828
2505 [40870]: https://github.com/rust-lang/rust/pull/40870
2506 [41085]: https://github.com/rust-lang/rust/pull/41085
2507 [41143]: https://github.com/rust-lang/rust/pull/41143
2508 [41168]: https://github.com/rust-lang/rust/pull/41168
2509 [41270]: https://github.com/rust-lang/rust/issues/41270
2510 [41469]: https://github.com/rust-lang/rust/pull/41469
2511 [41805]: https://github.com/rust-lang/rust/issues/41805
2512 [RFC 1422]: https://github.com/rust-lang/rfcs/blob/master/text/1422-pub-restricted.md
2513 [RFC 1665]: https://github.com/rust-lang/rfcs/blob/master/text/1665-windows-subsystem.md
2514 [`Child::try_wait`]: https://doc.rust-lang.org/std/process/struct.Child.html#method.try_wait
2515 [`HashMap::retain`]: https://doc.rust-lang.org/std/collections/struct.HashMap.html#method.retain
2516 [`HashSet::retain`]: https://doc.rust-lang.org/std/collections/struct.HashSet.html#method.retain
2517 [`PeekMut::pop`]: https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html#method.pop
2518 [`TcpStream::peek`]: https://doc.rust-lang.org/std/net/struct.TcpStream.html#method.peek
2519 [`UdpSocket::peek_from`]: https://doc.rust-lang.org/std/net/struct.UdpSocket.html#method.peek_from
2520 [`UdpSocket::peek`]: https://doc.rust-lang.org/std/net/struct.UdpSocket.html#method.peek
2521 [cargo/3842]: https://github.com/rust-lang/cargo/pull/3842
2522 [cargo/3847]: https://github.com/rust-lang/cargo/pull/3847
2523 [cargo/3885]: https://github.com/rust-lang/cargo/pull/3885
2524 [cargo/3901]: https://github.com/rust-lang/cargo/pull/3901
2525 [cargo/3952]: https://github.com/rust-lang/cargo/pull/3952
2528 Version 1.17.0 (2017-04-27)
2529 ===========================
2534 * [The lifetime of statics and consts defaults to `'static`][39265]. [RFC 1623]
2535 * [Fields of structs may be initialized without duplicating the field/variable
2536 names][39761]. [RFC 1682]
2537 * [`Self` may be included in the `where` clause of `impls`][38864]. [RFC 1647]
2538 * [When coercing to an unsized type lifetimes must be equal][40319]. That is,
2539 there is no subtyping between `T` and `U` when `T: Unsize<U>`. For example,
2540 coercing `&mut [&'a X; N]` to `&mut [&'b X]` requires `'a` be equal to
2541 `'b`. Soundness fix.
2542 * [Values passed to the indexing operator, `[]`, automatically coerce][40166]
2543 * [Static variables may contain references to other statics][40027]
2548 * [Exit quickly on only `--emit dep-info`][40336]
2549 * [Make `-C relocation-model` more correctly determine whether the linker
2550 creates a position-independent executable][40245]
2551 * [Add `-C overflow-checks` to directly control whether integer overflow
2553 * [The rustc type checker now checks items on demand instead of in a single
2554 in-order pass][40008]. This is mostly an internal refactoring in support of
2555 future work, including incremental type checking, but also resolves [RFC
2556 1647], allowing `Self` to appear in `impl` `where` clauses.
2557 * [Optimize vtable loads][39995]
2558 * [Turn off vectorization for Emscripten targets][39990]
2559 * [Provide suggestions for unknown macros imported with `use`][39953]
2560 * [Fix ICEs in path resolution][39939]
2561 * [Strip exception handling code on Emscripten when `panic=abort`][39193]
2562 * [Add clearer error message using `&str + &str`][39116]
2573 * [`Ordering::then`]
2574 * [`Ordering::then_with`]
2575 * [`BTreeMap::range`]
2576 * [`BTreeMap::range_mut`]
2577 * [`collections::Bound`]
2578 * [`process::abort`]
2579 * [`ptr::read_unaligned`]
2580 * [`ptr::write_unaligned`]
2581 * [`Result::expect_err`]
2584 * [`Cell::into_inner`]
2590 * [`BTreeMap` and `BTreeSet` can iterate over ranges][27787]
2591 * [`Cell` can store non-`Copy` types][39793]. [RFC 1651]
2592 * [`String` implements `FromIterator<&char>`][40028]
2593 * `Box` [implements][40009] a number of new conversions:
2594 `From<Box<str>> for String`,
2595 `From<Box<[T]>> for Vec<T>`,
2596 `From<Box<CStr>> for CString`,
2597 `From<Box<OsStr>> for OsString`,
2598 `From<Box<Path>> for PathBuf`,
2599 `Into<Box<str>> for String`,
2600 `Into<Box<[T]>> for Vec<T>`,
2601 `Into<Box<CStr>> for CString`,
2602 `Into<Box<OsStr>> for OsString`,
2603 `Into<Box<Path>> for PathBuf`,
2604 `Default for Box<str>`,
2605 `Default for Box<CStr>`,
2606 `Default for Box<OsStr>`,
2607 `From<&CStr> for Box<CStr>`,
2608 `From<&OsStr> for Box<OsStr>`,
2609 `From<&Path> for Box<Path>`
2610 * [`ffi::FromBytesWithNulError` implements `Error` and `Display`][39960]
2611 * [Specialize `PartialOrd<A> for [A] where A: Ord`][39642]
2612 * [Slightly optimize `slice::sort`][39538]
2613 * [Add `ToString` trait specialization for `Cow<'a, str>` and `String`][39440]
2614 * [`Box<[T]>` implements `From<&[T]> where T: Copy`,
2615 `Box<str>` implements `From<&str>`][39438]
2616 * [`IpAddr` implements `From` for various arrays. `SocketAddr` implements
2617 `From<(I, u16)> where I: Into<IpAddr>`][39372]
2618 * [`format!` estimates the needed capacity before writing a string][39356]
2619 * [Support unprivileged symlink creation in Windows][38921]
2620 * [`PathBuf` implements `Default`][38764]
2621 * [Implement `PartialEq<[A]>` for `VecDeque<A>`][38661]
2622 * [`HashMap` resizes adaptively][38368] to guard against DOS attacks
2623 and poor hash functions.
2628 * [Add `cargo check --all`][cargo/3731]
2629 * [Add an option to ignore SSL revocation checking][cargo/3699]
2630 * [Add `cargo run --package`][cargo/3691]
2631 * [Add `required_features`][cargo/3667]
2632 * [Assume `build.rs` is a build script][cargo/3664]
2633 * [Find workspace via `workspace_root` link in containing member][cargo/3562]
2638 * [Documentation is rendered with mdbook instead of the obsolete, in-tree
2640 * [The "Unstable Book" documents nightly-only features][ubook]
2641 * [Improve the style of the sidebar in rustdoc output][40265]
2642 * [Configure build correctly on 64-bit CPU's with the armhf ABI][40261]
2643 * [Fix MSP430 breakage due to `i128`][40257]
2644 * [Preliminary Solaris/SPARCv9 support][39903]
2645 * [`rustc` is linked statically on Windows MSVC targets][39837], allowing it to
2646 run without installing the MSVC runtime.
2647 * [`rustdoc --test` includes file names in test names][39788]
2648 * This release includes builds of `std` for `sparc64-unknown-linux-gnu`,
2649 `aarch64-unknown-linux-fuchsia`, and `x86_64-unknown-linux-fuchsia`.
2650 * [Initial support for `aarch64-unknown-freebsd`][39491]
2651 * [Initial support for `i686-unknown-netbsd`][39426]
2652 * [This release no longer includes the old makefile build system][39431]. Rust
2653 is built with a custom build system, written in Rust, and with Cargo.
2654 * [Add Debug implementations for libcollection structs][39002]
2655 * [`TypeId` implements `PartialOrd` and `Ord`][38981]
2656 * [`--test-threads=0` produces an error][38945]
2657 * [`rustup` installs documentation by default][40526]
2658 * [The Rust source includes NatVis visualizations][39843]. These can be used by
2659 WinDbg and Visual Studio to improve the debugging experience.
2664 * [Rust 1.17 does not correctly detect the MSVC 2017 linker][38584]. As a
2665 workaround, either use MSVC 2015 or run vcvars.bat.
2666 * [When coercing to an unsized type lifetimes must be equal][40319]. That is,
2667 disallow subtyping between `T` and `U` when `T: Unsize<U>`, e.g. coercing
2668 `&mut [&'a X; N]` to `&mut [&'b X]` requires `'a` be equal to `'b`. Soundness
2670 * [`format!` and `Display::to_string` panic if an underlying formatting
2671 implementation returns an error][40117]. Previously the error was silently
2672 ignored. It is incorrect for `write_fmt` to return an error when writing
2674 * [In-tree crates are verified to be unstable][39851]. Previously, some minor
2675 crates were marked stable and could be accessed from the stable toolchain.
2676 * [Rust git source no longer includes vendored crates][39728]. Those that need
2677 to build with vendored crates should build from release tarballs.
2678 * [Fix inert attributes from `proc_macro_derives`][39572]
2679 * [During crate resolution, rustc prefers a crate in the sysroot if two crates
2680 are otherwise identical][39518]. Unlikely to be encountered outside the Rust
2682 * [Fixed bugs around how type inference interacts with dead-code][39485]. The
2683 existing code generally ignores the type of dead-code unless a type-hint is
2684 provided; this can cause surprising inference interactions particularly around
2685 defaulting. The new code uniformly ignores the result type of dead-code.
2686 * [Tuple-struct constructors with private fields are no longer visible][38932]
2687 * [Lifetime parameters that do not appear in the arguments are now considered
2688 early-bound][38897], resolving a soundness bug (#[32330]). The
2689 `hr_lifetime_in_assoc_type` future-compatibility lint has been in effect since
2691 * [rustdoc: fix doctests with non-feature crate attributes][38161]
2692 * [Make transmuting from fn item types to pointer-sized types a hard
2695 [27787]: https://github.com/rust-lang/rust/issues/27787
2696 [32330]: https://github.com/rust-lang/rust/issues/32330
2697 [34198]: https://github.com/rust-lang/rust/pull/34198
2698 [38161]: https://github.com/rust-lang/rust/pull/38161
2699 [38368]: https://github.com/rust-lang/rust/pull/38368
2700 [38584]: https://github.com/rust-lang/rust/issues/38584
2701 [38661]: https://github.com/rust-lang/rust/pull/38661
2702 [38764]: https://github.com/rust-lang/rust/pull/38764
2703 [38864]: https://github.com/rust-lang/rust/issues/38864
2704 [38897]: https://github.com/rust-lang/rust/pull/38897
2705 [38921]: https://github.com/rust-lang/rust/pull/38921
2706 [38932]: https://github.com/rust-lang/rust/pull/38932
2707 [38945]: https://github.com/rust-lang/rust/pull/38945
2708 [38981]: https://github.com/rust-lang/rust/pull/38981
2709 [39002]: https://github.com/rust-lang/rust/pull/39002
2710 [39116]: https://github.com/rust-lang/rust/pull/39116
2711 [39193]: https://github.com/rust-lang/rust/pull/39193
2712 [39265]: https://github.com/rust-lang/rust/pull/39265
2713 [39356]: https://github.com/rust-lang/rust/pull/39356
2714 [39372]: https://github.com/rust-lang/rust/pull/39372
2715 [39426]: https://github.com/rust-lang/rust/pull/39426
2716 [39431]: https://github.com/rust-lang/rust/pull/39431
2717 [39438]: https://github.com/rust-lang/rust/pull/39438
2718 [39440]: https://github.com/rust-lang/rust/pull/39440
2719 [39485]: https://github.com/rust-lang/rust/pull/39485
2720 [39491]: https://github.com/rust-lang/rust/pull/39491
2721 [39518]: https://github.com/rust-lang/rust/pull/39518
2722 [39538]: https://github.com/rust-lang/rust/pull/39538
2723 [39572]: https://github.com/rust-lang/rust/pull/39572
2724 [39633]: https://github.com/rust-lang/rust/pull/39633
2725 [39642]: https://github.com/rust-lang/rust/pull/39642
2726 [39728]: https://github.com/rust-lang/rust/pull/39728
2727 [39761]: https://github.com/rust-lang/rust/pull/39761
2728 [39788]: https://github.com/rust-lang/rust/pull/39788
2729 [39793]: https://github.com/rust-lang/rust/pull/39793
2730 [39837]: https://github.com/rust-lang/rust/pull/39837
2731 [39843]: https://github.com/rust-lang/rust/pull/39843
2732 [39851]: https://github.com/rust-lang/rust/pull/39851
2733 [39903]: https://github.com/rust-lang/rust/pull/39903
2734 [39939]: https://github.com/rust-lang/rust/pull/39939
2735 [39953]: https://github.com/rust-lang/rust/pull/39953
2736 [39960]: https://github.com/rust-lang/rust/pull/39960
2737 [39990]: https://github.com/rust-lang/rust/pull/39990
2738 [39995]: https://github.com/rust-lang/rust/pull/39995
2739 [40008]: https://github.com/rust-lang/rust/pull/40008
2740 [40009]: https://github.com/rust-lang/rust/pull/40009
2741 [40027]: https://github.com/rust-lang/rust/pull/40027
2742 [40028]: https://github.com/rust-lang/rust/pull/40028
2743 [40037]: https://github.com/rust-lang/rust/pull/40037
2744 [40117]: https://github.com/rust-lang/rust/pull/40117
2745 [40166]: https://github.com/rust-lang/rust/pull/40166
2746 [40245]: https://github.com/rust-lang/rust/pull/40245
2747 [40257]: https://github.com/rust-lang/rust/pull/40257
2748 [40261]: https://github.com/rust-lang/rust/pull/40261
2749 [40265]: https://github.com/rust-lang/rust/pull/40265
2750 [40319]: https://github.com/rust-lang/rust/pull/40319
2751 [40336]: https://github.com/rust-lang/rust/pull/40336
2752 [40526]: https://github.com/rust-lang/rust/pull/40526
2753 [RFC 1623]: https://github.com/rust-lang/rfcs/blob/master/text/1623-static.md
2754 [RFC 1647]: https://github.com/rust-lang/rfcs/blob/master/text/1647-allow-self-in-where-clauses.md
2755 [RFC 1651]: https://github.com/rust-lang/rfcs/blob/master/text/1651-movecell.md
2756 [RFC 1682]: https://github.com/rust-lang/rfcs/blob/master/text/1682-field-init-shorthand.md
2757 [`Arc::from_raw`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.from_raw
2758 [`Arc::into_raw`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.into_raw
2759 [`Arc::ptr_eq`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.ptr_eq
2760 [`BTreeMap::range_mut`]: https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.range_mut
2761 [`BTreeMap::range`]: https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.range
2762 [`Cell::into_inner`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.into_inner
2763 [`Cell::replace`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.replace
2764 [`Cell::swap`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.swap
2765 [`Cell::take`]: https://doc.rust-lang.org/std/cell/struct.Cell.html#method.take
2766 [`Ordering::then_with`]: https://doc.rust-lang.org/std/cmp/enum.Ordering.html#method.then_with
2767 [`Ordering::then`]: https://doc.rust-lang.org/std/cmp/enum.Ordering.html#method.then
2768 [`Rc::from_raw`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.from_raw
2769 [`Rc::into_raw`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.into_raw
2770 [`Rc::ptr_eq`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.ptr_eq
2771 [`Result::expect_err`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.expect_err
2772 [`collections::Bound`]: https://doc.rust-lang.org/std/collections/enum.Bound.html
2773 [`process::abort`]: https://doc.rust-lang.org/std/process/fn.abort.html
2774 [`ptr::read_unaligned`]: https://doc.rust-lang.org/std/ptr/fn.read_unaligned.html
2775 [`ptr::write_unaligned`]: https://doc.rust-lang.org/std/ptr/fn.write_unaligned.html
2776 [cargo/3562]: https://github.com/rust-lang/cargo/pull/3562
2777 [cargo/3664]: https://github.com/rust-lang/cargo/pull/3664
2778 [cargo/3667]: https://github.com/rust-lang/cargo/pull/3667
2779 [cargo/3691]: https://github.com/rust-lang/cargo/pull/3691
2780 [cargo/3699]: https://github.com/rust-lang/cargo/pull/3699
2781 [cargo/3731]: https://github.com/rust-lang/cargo/pull/3731
2782 [mdbook]: https://crates.io/crates/mdbook
2783 [ubook]: https://doc.rust-lang.org/unstable-book/
2786 Version 1.16.0 (2017-03-16)
2787 ===========================
2792 * [The compiler's `dead_code` lint now accounts for type aliases][38051].
2793 * [Uninhabitable enums (those without any variants) no longer permit wildcard
2794 match patterns][38069]
2795 * [Clean up semantics of `self` in an import list][38313]
2796 * [`Self` may appear in `impl` headers][38920]
2797 * [`Self` may appear in struct expressions][39282]
2802 * [`rustc` now supports `--emit=metadata`, which causes rustc to emit
2803 a `.rmeta` file containing only crate metadata][38571]. This can be
2804 used by tools like the Rust Language Service to perform
2805 metadata-only builds.
2806 * [Levenshtein based typo suggestions now work in most places, while
2807 previously they worked only for fields and sometimes for local
2808 variables][38927]. Together with the overhaul of "no
2809 resolution"/"unexpected resolution" errors (#[38154]) they result in
2810 large and systematic improvement in resolution diagnostics.
2811 * [Fix `transmute::<T, U>` where `T` requires a bigger alignment than
2813 * [rustc: use -Xlinker when specifying an rpath with ',' in it][38798]
2814 * [`rustc` no longer attempts to provide "consider using an explicit
2815 lifetime" suggestions][37057]. They were inaccurate.
2820 * [`VecDeque::truncate`]
2821 * [`VecDeque::resize`]
2822 * [`String::insert_str`]
2823 * [`Duration::checked_add`]
2824 * [`Duration::checked_sub`]
2825 * [`Duration::checked_div`]
2826 * [`Duration::checked_mul`]
2829 * [`SocketAddr::is_ipv4`]
2830 * [`SocketAddr::is_ipv6`]
2831 * [`IpAddr::is_ipv4`]
2832 * [`IpAddr::is_ipv6`]
2834 * [`Vec::dedup_by_key`]
2835 * [`Result::unwrap_or_default`]
2836 * [`<*const T>::wrapping_offset`]
2837 * [`<*mut T>::wrapping_offset`]
2838 * `CommandExt::creation_flags`
2839 * [`File::set_permissions`]
2840 * [`String::split_off`]
2845 * [`[T]::binary_search` and `[T]::binary_search_by_key` now take
2846 their argument by `Borrow` parameter][37761]
2847 * [All public types in std implement `Debug`][38006]
2848 * [`IpAddr` implements `From<Ipv4Addr>` and `From<Ipv6Addr>`][38327]
2849 * [`Ipv6Addr` implements `From<[u16; 8]>`][38131]
2850 * [Ctrl-Z returns from `Stdin.read()` when reading from the console on
2852 * [std: Fix partial writes in `LineWriter`][38062]
2853 * [std: Clamp max read/write sizes on Unix][38062]
2854 * [Use more specific panic message for `&str` slicing errors][38066]
2855 * [`TcpListener::set_only_v6` is deprecated][38304]. This
2856 functionality cannot be achieved in std currently.
2857 * [`writeln!`, like `println!`, now accepts a form with no string
2858 or formatting arguments, to just print a newline][38469]
2859 * [Implement `iter::Sum` and `iter::Product` for `Result`][38580]
2860 * [Reduce the size of static data in `std_unicode::tables`][38781]
2861 * [`char::EscapeDebug`, `EscapeDefault`, `EscapeUnicode`,
2862 `CaseMappingIter`, `ToLowercase`, `ToUppercase`, implement
2864 * [`Duration` implements `Sum`][38712]
2865 * [`String` implements `ToSocketAddrs`][39048]
2870 * [The `cargo check` command does a type check of a project without
2871 building it][cargo/3296]
2872 * [crates.io will display CI badges from Travis and AppVeyor, if
2873 specified in Cargo.toml][cargo/3546]
2874 * [crates.io will display categories listed in Cargo.toml][cargo/3301]
2875 * [Compilation profiles accept integer values for `debug`, in addition
2876 to `true` and `false`. These are passed to `rustc` as the value to
2877 `-C debuginfo`][cargo/3534]
2878 * [Implement `cargo --version --verbose`][cargo/3604]
2879 * [All builds now output 'dep-info' build dependencies compatible with
2880 make and ninja][cargo/3557]
2881 * [Build all workspace members with `build --all`][cargo/3511]
2882 * [Document all workspace members with `doc --all`][cargo/3515]
2883 * [Path deps outside workspace are not members][cargo/3443]
2888 * [`rustdoc` has a `--sysroot` argument that, like `rustc`, specifies
2889 the path to the Rust implementation][38589]
2890 * [The `armv7-linux-androideabi` target no longer enables NEON
2891 extensions, per Google's ABI guide][38413]
2892 * [The stock standard library can be compiled for Redox OS][38401]
2893 * [Rust has initial SPARC support][38726]. Tier 3. No builds
2895 * [Rust has experimental support for Nvidia PTX][38559]. Tier 3. No
2897 * [Fix backtraces on i686-pc-windows-gnu by disabling FPO][39379]
2902 * [Uninhabitable enums (those without any variants) no longer permit wildcard
2903 match patterns][38069]
2904 * In this release, references to uninhabited types can not be
2905 pattern-matched. This was accidentally allowed in 1.15.
2906 * [The compiler's `dead_code` lint now accounts for type aliases][38051].
2907 * [Ctrl-Z returns from `Stdin.read()` when reading from the console on
2909 * [Clean up semantics of `self` in an import list][38313]
2910 * Reimplemented lifetime elision. This change was almost entirely compatible
2911 with existing code, but it did close a number of small bugs and loopholes,
2912 as well as being more accepting in some other [cases][41105].
2914 [37057]: https://github.com/rust-lang/rust/pull/37057
2915 [37761]: https://github.com/rust-lang/rust/pull/37761
2916 [38006]: https://github.com/rust-lang/rust/pull/38006
2917 [38051]: https://github.com/rust-lang/rust/pull/38051
2918 [38062]: https://github.com/rust-lang/rust/pull/38062
2919 [38062]: https://github.com/rust-lang/rust/pull/38622
2920 [38066]: https://github.com/rust-lang/rust/pull/38066
2921 [38069]: https://github.com/rust-lang/rust/pull/38069
2922 [38131]: https://github.com/rust-lang/rust/pull/38131
2923 [38154]: https://github.com/rust-lang/rust/pull/38154
2924 [38274]: https://github.com/rust-lang/rust/pull/38274
2925 [38304]: https://github.com/rust-lang/rust/pull/38304
2926 [38313]: https://github.com/rust-lang/rust/pull/38313
2927 [38314]: https://github.com/rust-lang/rust/pull/38314
2928 [38327]: https://github.com/rust-lang/rust/pull/38327
2929 [38401]: https://github.com/rust-lang/rust/pull/38401
2930 [38413]: https://github.com/rust-lang/rust/pull/38413
2931 [38469]: https://github.com/rust-lang/rust/pull/38469
2932 [38559]: https://github.com/rust-lang/rust/pull/38559
2933 [38571]: https://github.com/rust-lang/rust/pull/38571
2934 [38580]: https://github.com/rust-lang/rust/pull/38580
2935 [38589]: https://github.com/rust-lang/rust/pull/38589
2936 [38670]: https://github.com/rust-lang/rust/pull/38670
2937 [38712]: https://github.com/rust-lang/rust/pull/38712
2938 [38726]: https://github.com/rust-lang/rust/pull/38726
2939 [38781]: https://github.com/rust-lang/rust/pull/38781
2940 [38798]: https://github.com/rust-lang/rust/pull/38798
2941 [38909]: https://github.com/rust-lang/rust/pull/38909
2942 [38920]: https://github.com/rust-lang/rust/pull/38920
2943 [38927]: https://github.com/rust-lang/rust/pull/38927
2944 [39048]: https://github.com/rust-lang/rust/pull/39048
2945 [39282]: https://github.com/rust-lang/rust/pull/39282
2946 [39379]: https://github.com/rust-lang/rust/pull/39379
2947 [41105]: https://github.com/rust-lang/rust/issues/41105
2948 [`<*const T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset
2949 [`<*mut T>::wrapping_offset`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_offset
2950 [`Duration::checked_add`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_add
2951 [`Duration::checked_div`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_div
2952 [`Duration::checked_mul`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_mul
2953 [`Duration::checked_sub`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.checked_sub
2954 [`File::set_permissions`]: https://doc.rust-lang.org/std/fs/struct.File.html#method.set_permissions
2955 [`IpAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv4
2956 [`IpAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_ipv6
2957 [`Result::unwrap_or_default`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.unwrap_or_default
2958 [`SocketAddr::is_ipv4`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv4
2959 [`SocketAddr::is_ipv6`]: https://doc.rust-lang.org/std/net/enum.SocketAddr.html#method.is_ipv6
2960 [`String::insert_str`]: https://doc.rust-lang.org/std/string/struct.String.html#method.insert_str
2961 [`String::split_off`]: https://doc.rust-lang.org/std/string/struct.String.html#method.split_off
2962 [`Vec::dedup_by_key`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by_key
2963 [`Vec::dedup_by`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.dedup_by
2964 [`VecDeque::resize`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.resize
2965 [`VecDeque::truncate`]: https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.truncate
2966 [`str::repeat`]: https://doc.rust-lang.org/std/primitive.str.html#method.repeat
2967 [`str::replacen`]: https://doc.rust-lang.org/std/primitive.str.html#method.replacen
2968 [cargo/3296]: https://github.com/rust-lang/cargo/pull/3296
2969 [cargo/3301]: https://github.com/rust-lang/cargo/pull/3301
2970 [cargo/3443]: https://github.com/rust-lang/cargo/pull/3443
2971 [cargo/3511]: https://github.com/rust-lang/cargo/pull/3511
2972 [cargo/3515]: https://github.com/rust-lang/cargo/pull/3515
2973 [cargo/3534]: https://github.com/rust-lang/cargo/pull/3534
2974 [cargo/3546]: https://github.com/rust-lang/cargo/pull/3546
2975 [cargo/3557]: https://github.com/rust-lang/cargo/pull/3557
2976 [cargo/3604]: https://github.com/rust-lang/cargo/pull/3604
2977 [RFC 1623]: https://github.com/rust-lang/rfcs/blob/master/text/1623-static.md
2980 Version 1.15.1 (2017-02-09)
2981 ===========================
2983 * [Fix IntoIter::as_mut_slice's signature][39466]
2984 * [Compile compiler builtins with `-fPIC` on 32-bit platforms][39523]
2986 [39466]: https://github.com/rust-lang/rust/pull/39466
2987 [39523]: https://github.com/rust-lang/rust/pull/39523
2990 Version 1.15.0 (2017-02-02)
2991 ===========================
2996 * Basic procedural macros allowing custom `#[derive]`, aka "macros 1.1", are
2997 stable. This allows popular code-generating crates like Serde and Diesel to
2998 work ergonomically. [RFC 1681].
2999 * [Tuple structs may be empty. Unary and empty tuple structs may be instantiated
3000 with curly braces][36868]. Part of [RFC 1506].
3001 * [A number of minor changes to name resolution have been activated][37127].
3002 They add up to more consistent semantics, allowing for future evolution of
3003 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
3004 details of what is different. The breaking changes here have been transitioned
3005 through the [`legacy_imports`] lint since 1.14, with no known regressions.
3006 * [In `macro_rules`, `path` fragments can now be parsed as type parameter
3008 * [`?Sized` can be used in `where` clauses][37791]
3009 * [There is now a limit on the size of monomorphized types and it can be
3010 modified with the `#![type_size_limit]` crate attribute, similarly to
3011 the `#![recursion_limit]` attribute][37789]
3016 * [On Windows, the compiler will apply dllimport attributes when linking to
3017 extern functions][37973]. Additional attributes and flags can control which
3018 library kind is linked and its name. [RFC 1717].
3019 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
3020 * [The `--test` flag works with procedural macro crates][38107]
3021 * [Fix `extern "aapcs" fn` ABI][37814]
3022 * [The `-C no-stack-check` flag is deprecated][37636]. It does nothing.
3023 * [The `format!` expander recognizes incorrect `printf` and shell-style
3024 formatting directives and suggests the correct format][37613].
3025 * [Only report one error for all unused imports in an import list][37456]
3027 Compiler Performance
3028 --------------------
3030 * [Avoid unnecessary `mk_ty` calls in `Ty::super_fold_with`][37705]
3031 * [Avoid more unnecessary `mk_ty` calls in `Ty::super_fold_with`][37979]
3032 * [Don't clone in `UnificationTable::probe`][37848]
3033 * [Remove `scope_auxiliary` to cut RSS by 10%][37764]
3034 * [Use small vectors in type walker][37760]
3035 * [Macro expansion performance was improved][37701]
3036 * [Change `HirVec<P<T>>` to `HirVec<T>` in `hir::Expr`][37642]
3037 * [Replace FNV with a faster hash function][37229]
3042 * [`std::iter::Iterator::min_by`]
3043 * [`std::iter::Iterator::max_by`]
3044 * [`std::os::*::fs::FileExt`]
3045 * [`std::sync::atomic::Atomic*::get_mut`]
3046 * [`std::sync::atomic::Atomic*::into_inner`]
3047 * [`std::vec::IntoIter::as_slice`]
3048 * [`std::vec::IntoIter::as_mut_slice`]
3049 * [`std::sync::mpsc::Receiver::try_iter`]
3050 * [`std::os::unix::process::CommandExt::before_exec`]
3051 * [`std::rc::Rc::strong_count`]
3052 * [`std::rc::Rc::weak_count`]
3053 * [`std::sync::Arc::strong_count`]
3054 * [`std::sync::Arc::weak_count`]
3055 * [`std::char::encode_utf8`]
3056 * [`std::char::encode_utf16`]
3057 * [`std::cell::Ref::clone`]
3058 * [`std::io::Take::into_inner`]
3063 * [The standard sorting algorithm has been rewritten for dramatic performance
3064 improvements][38192]. It is a hybrid merge sort, drawing influences from
3065 Timsort. Previously it was a naive merge sort.
3066 * [`Iterator::nth` no longer has a `Sized` bound][38134]
3067 * [`Extend<&T>` is specialized for `Vec` where `T: Copy`][38182] to improve
3069 * [`chars().count()` is much faster][37888] and so are [`chars().last()`
3070 and `char_indices().last()`][37882]
3071 * [Fix ARM Objective-C ABI in `std::env::args`][38146]
3072 * [Chinese characters display correctly in `fmt::Debug`][37855]
3073 * [Derive `Default` for `Duration`][37699]
3074 * [Support creation of anonymous pipes on WinXP/2k][37677]
3075 * [`mpsc::RecvTimeoutError` implements `Error`][37527]
3076 * [Don't pass overlapped handles to processes][38835]
3081 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
3082 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
3083 should instead check the variable at runtime with `std::env`. That the value
3084 was set at build time was a bug, and incorrect when cross-compiling. This
3085 change is known to cause breakage.
3086 * [Add `--all` flag to `cargo test`][cargo/3221]
3087 * [Compile statically against the MSVC CRT][cargo/3363]
3088 * [Mix feature flags into fingerprint/metadata shorthash][cargo/3102]
3089 * [Link OpenSSL statically on OSX][cargo/3311]
3090 * [Apply new fingerprinting to build dir outputs][cargo/3310]
3091 * [Test for bad path overrides with summaries][cargo/3336]
3092 * [Require `cargo install --vers` to take a semver version][cargo/3338]
3093 * [Fix retrying crate downloads for network errors][cargo/3348]
3094 * [Implement string lookup for `build.rustflags` config key][cargo/3356]
3095 * [Emit more info on --message-format=json][cargo/3319]
3096 * [Assume `build.rs` in the same directory as `Cargo.toml` is a build script][cargo/3361]
3097 * [Don't ignore errors in workspace manifest][cargo/3409]
3098 * [Fix `--message-format JSON` when rustc emits non-JSON warnings][cargo/3410]
3103 * [Test runners (binaries built with `--test`) now support a `--list` argument
3104 that lists the tests it contains][38185]
3105 * [Test runners now support a `--exact` argument that makes the test filter
3106 match exactly, instead of matching only a substring of the test name][38181]
3107 * [rustdoc supports a `--playground-url` flag][37763]
3108 * [rustdoc provides more details about `#[should_panic]` errors][37749]
3113 * [The Rust build system is now written in Rust][37817]. The Makefiles may
3114 continue to be used in this release by passing `--disable-rustbuild` to the
3115 configure script, but they will be deleted soon. Note that the new build
3116 system uses a different on-disk layout that will likely affect any scripts
3118 * [Rust supports i686-unknown-openbsd][38086]. Tier 3 support. No testing or
3120 * [Rust supports the MSP430][37627]. Tier 3 support. No testing or releases.
3121 * [Rust supports the ARMv5TE architecture][37615]. Tier 3 support. No testing or
3127 * [A number of minor changes to name resolution have been activated][37127].
3128 They add up to more consistent semantics, allowing for future evolution of
3129 Rust macros. Specified in [RFC 1560], see its section on ["changes"] for
3130 details of what is different. The breaking changes here have been transitioned
3131 through the [`legacy_imports`] lint since 1.14, with no known regressions.
3132 * [In this release, Cargo build scripts no longer have access to the `OUT_DIR`
3133 environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They
3134 should instead check the variable at runtime with `std::env`. That the value
3135 was set at build time was a bug, and incorrect when cross-compiling. This
3136 change is known to cause breakage.
3137 * [Higher-ranked lifetimes are no longer allowed to appear _only_ in associated
3138 types][33685]. The [`hr_lifetime_in_assoc_type` lint] has been a warning since
3139 1.10 and is now an error by default. It will become a hard error in the near
3141 * [The semantics relating modules to file system directories are changing in
3142 minor ways][37602]. This is captured in the new `legacy_directory_ownership`
3143 lint, which is a warning in this release, and will become a hard error in the
3145 * [Rust-ABI symbols are no longer exported from cdylibs][38117]
3146 * [Once `Peekable` peeks a `None` it will return that `None` without re-querying
3147 the underlying iterator][37834]
3149 ["changes"]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md#changes-to-name-resolution-rules
3150 [33685]: https://github.com/rust-lang/rust/issues/33685
3151 [36868]: https://github.com/rust-lang/rust/pull/36868
3152 [37127]: https://github.com/rust-lang/rust/pull/37127
3153 [37229]: https://github.com/rust-lang/rust/pull/37229
3154 [37456]: https://github.com/rust-lang/rust/pull/37456
3155 [37527]: https://github.com/rust-lang/rust/pull/37527
3156 [37602]: https://github.com/rust-lang/rust/pull/37602
3157 [37613]: https://github.com/rust-lang/rust/pull/37613
3158 [37615]: https://github.com/rust-lang/rust/pull/37615
3159 [37636]: https://github.com/rust-lang/rust/pull/37636
3160 [37627]: https://github.com/rust-lang/rust/pull/37627
3161 [37642]: https://github.com/rust-lang/rust/pull/37642
3162 [37677]: https://github.com/rust-lang/rust/pull/37677
3163 [37699]: https://github.com/rust-lang/rust/pull/37699
3164 [37701]: https://github.com/rust-lang/rust/pull/37701
3165 [37705]: https://github.com/rust-lang/rust/pull/37705
3166 [37749]: https://github.com/rust-lang/rust/pull/37749
3167 [37760]: https://github.com/rust-lang/rust/pull/37760
3168 [37763]: https://github.com/rust-lang/rust/pull/37763
3169 [37764]: https://github.com/rust-lang/rust/pull/37764
3170 [37789]: https://github.com/rust-lang/rust/pull/37789
3171 [37791]: https://github.com/rust-lang/rust/pull/37791
3172 [37814]: https://github.com/rust-lang/rust/pull/37814
3173 [37817]: https://github.com/rust-lang/rust/pull/37817
3174 [37834]: https://github.com/rust-lang/rust/pull/37834
3175 [37848]: https://github.com/rust-lang/rust/pull/37848
3176 [37855]: https://github.com/rust-lang/rust/pull/37855
3177 [37882]: https://github.com/rust-lang/rust/pull/37882
3178 [37888]: https://github.com/rust-lang/rust/pull/37888
3179 [37973]: https://github.com/rust-lang/rust/pull/37973
3180 [37979]: https://github.com/rust-lang/rust/pull/37979
3181 [38086]: https://github.com/rust-lang/rust/pull/38086
3182 [38107]: https://github.com/rust-lang/rust/pull/38107
3183 [38117]: https://github.com/rust-lang/rust/pull/38117
3184 [38134]: https://github.com/rust-lang/rust/pull/38134
3185 [38146]: https://github.com/rust-lang/rust/pull/38146
3186 [38181]: https://github.com/rust-lang/rust/pull/38181
3187 [38182]: https://github.com/rust-lang/rust/pull/38182
3188 [38185]: https://github.com/rust-lang/rust/pull/38185
3189 [38192]: https://github.com/rust-lang/rust/pull/38192
3190 [38279]: https://github.com/rust-lang/rust/pull/38279
3191 [38835]: https://github.com/rust-lang/rust/pull/38835
3192 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
3193 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
3194 [RFC 1560]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md
3195 [RFC 1681]: https://github.com/rust-lang/rfcs/blob/master/text/1681-macros-1.1.md
3196 [RFC 1717]: https://github.com/rust-lang/rfcs/blob/master/text/1717-dllimport.md
3197 [`hr_lifetime_in_assoc_type` lint]: https://github.com/rust-lang/rust/issues/33685
3198 [`legacy_imports`]: https://github.com/rust-lang/rust/pull/38271
3199 [cargo/3102]: https://github.com/rust-lang/cargo/pull/3102
3200 [cargo/3221]: https://github.com/rust-lang/cargo/pull/3221
3201 [cargo/3310]: https://github.com/rust-lang/cargo/pull/3310
3202 [cargo/3311]: https://github.com/rust-lang/cargo/pull/3311
3203 [cargo/3319]: https://github.com/rust-lang/cargo/pull/3319
3204 [cargo/3336]: https://github.com/rust-lang/cargo/pull/3336
3205 [cargo/3338]: https://github.com/rust-lang/cargo/pull/3338
3206 [cargo/3348]: https://github.com/rust-lang/cargo/pull/3348
3207 [cargo/3356]: https://github.com/rust-lang/cargo/pull/3356
3208 [cargo/3361]: https://github.com/rust-lang/cargo/pull/3361
3209 [cargo/3363]: https://github.com/rust-lang/cargo/pull/3363
3210 [cargo/3368]: https://github.com/rust-lang/cargo/issues/3368
3211 [cargo/3409]: https://github.com/rust-lang/cargo/pull/3409
3212 [cargo/3410]: https://github.com/rust-lang/cargo/pull/3410
3213 [`std::iter::Iterator::min_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.min_by
3214 [`std::iter::Iterator::max_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.max_by
3215 [`std::os::*::fs::FileExt`]: https://doc.rust-lang.org/std/os/unix/fs/trait.FileExt.html
3216 [`std::sync::atomic::Atomic*::get_mut`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.get_mut
3217 [`std::sync::atomic::Atomic*::into_inner`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.into_inner
3218 [`std::vec::IntoIter::as_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_slice
3219 [`std::vec::IntoIter::as_mut_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_mut_slice
3220 [`std::sync::mpsc::Receiver::try_iter`]: https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.try_iter
3221 [`std::os::unix::process::CommandExt::before_exec`]: https://doc.rust-lang.org/std/os/unix/process/trait.CommandExt.html#tymethod.before_exec
3222 [`std::rc::Rc::strong_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.strong_count
3223 [`std::rc::Rc::weak_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.weak_count
3224 [`std::sync::Arc::strong_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.strong_count
3225 [`std::sync::Arc::weak_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.weak_count
3226 [`std::char::encode_utf8`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf8
3227 [`std::char::encode_utf16`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf16
3228 [`std::cell::Ref::clone`]: https://doc.rust-lang.org/std/cell/struct.Ref.html#method.clone
3229 [`std::io::Take::into_inner`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.into_inner
3232 Version 1.14.0 (2016-12-22)
3233 ===========================
3238 * [`..` matches multiple tuple fields in enum variants, structs
3239 and tuples][36843]. [RFC 1492].
3240 * [Safe `fn` items can be coerced to `unsafe fn` pointers][37389]
3241 * [`use *` and `use ::*` both glob-import from the crate root][37367]
3242 * [It's now possible to call a `Vec<Box<Fn()>>` without explicit
3243 dereferencing][36822]
3248 * [Mark enums with non-zero discriminant as non-zero][37224]
3249 * [Lower-case `static mut` names are linted like other
3250 statics and consts][37162]
3251 * [Fix ICE on some macros in const integer positions
3252 (e.g. `[u8; m!()]`)][36819]
3253 * [Improve error message and snippet for "did you mean `x`"][36798]
3254 * [Add a panic-strategy field to the target specification][36794]
3255 * [Include LLVM version in `--version --verbose`][37200]
3257 Compile-time Optimizations
3258 --------------------------
3260 * [Improve macro expansion performance][37569]
3261 * [Shrink `Expr_::ExprInlineAsm`][37445]
3262 * [Replace all uses of SHA-256 with BLAKE2b][37439]
3263 * [Reduce the number of bytes hashed by `IchHasher`][37427]
3264 * [Avoid more allocations when compiling html5ever][37373]
3265 * [Use `SmallVector` in `CombineFields::instantiate`][37322]
3266 * [Avoid some allocations in the macro parser][37318]
3267 * [Use a faster deflate setting][37298]
3268 * [Add `ArrayVec` and `AccumulateVec` to reduce heap allocations
3269 during interning of slices][37270]
3270 * [Optimize `write_metadata`][37267]
3271 * [Don't process obligation forest cycles when stalled][37231]
3272 * [Avoid many `CrateConfig` clones][37161]
3273 * [Optimize `Substs::super_fold_with`][37108]
3274 * [Optimize `ObligationForest`'s `NodeState` handling][36993]
3275 * [Speed up `plug_leaks`][36917]
3280 * [`println!()`, with no arguments, prints newline][36825].
3281 Previously, an empty string was required to achieve the same.
3282 * [`Wrapping` impls standard binary and unary operators, as well as
3283 the `Sum` and `Product` iterators][37356]
3284 * [Implement `From<Cow<str>> for String` and `From<Cow<[T]>> for
3286 * [Improve `fold` performance for `chain`, `cloned`, `map`, and
3287 `VecDeque` iterators][37315]
3288 * [Improve `SipHasher` performance on small values][37312]
3289 * [Add Iterator trait TrustedLen to enable better FromIterator /
3291 * [Expand `.zip()` specialization to `.map()` and `.cloned()`][37230]
3292 * [`ReadDir` implements `Debug`][37221]
3293 * [Implement `RefUnwindSafe` for atomic types][37178]
3294 * [Specialize `Vec::extend` to `Vec::extend_from_slice`][37094]
3295 * [Avoid allocations in `Decoder::read_str`][37064]
3296 * [`io::Error` implements `From<io::ErrorKind>`][37037]
3297 * [Impl `Debug` for raw pointers to unsized data][36880]
3298 * [Don't reuse `HashMap` random seeds][37470]
3299 * [The internal memory layout of `HashMap` is more cache-friendly, for
3300 significant improvements in some operations][36692]
3301 * [`HashMap` uses less memory on 32-bit architectures][36595]
3302 * [Impl `Add<{str, Cow<str>}>` for `Cow<str>`][36430]
3307 * [Expose rustc cfg values to build scripts][cargo/3243]
3308 * [Allow cargo to work with read-only `CARGO_HOME`][cargo/3259]
3309 * [Fix passing --features when testing multiple packages][cargo/3280]
3310 * [Use a single profile set per workspace][cargo/3249]
3311 * [Load `replace` sections from lock files][cargo/3220]
3312 * [Ignore `panic` configuration for test/bench profiles][cargo/3175]
3317 * [rustup is the recommended Rust installation method][1.14rustup]
3318 * This release includes host (rustc) builds for Linux on MIPS, PowerPC, and
3319 S390x. These are [tier 2] platforms and may have major defects. Follow the
3320 instructions on the website to install, or add the targets to an existing
3321 installation with `rustup target add`. The new target triples are:
3322 - `mips-unknown-linux-gnu`
3323 - `mipsel-unknown-linux-gnu`
3324 - `mips64-unknown-linux-gnuabi64`
3325 - `mips64el-unknown-linux-gnuabi64 `
3326 - `powerpc-unknown-linux-gnu`
3327 - `powerpc64-unknown-linux-gnu`
3328 - `powerpc64le-unknown-linux-gnu`
3329 - `s390x-unknown-linux-gnu `
3330 * This release includes target (std) builds for ARM Linux running MUSL
3331 libc. These are [tier 2] platforms and may have major defects. Add the
3332 following triples to an existing rustup installation with `rustup target add`:
3333 - `arm-unknown-linux-musleabi`
3334 - `arm-unknown-linux-musleabihf`
3335 - `armv7-unknown-linux-musleabihf`
3336 * This release includes [experimental support for WebAssembly][1.14wasm], via
3337 the `wasm32-unknown-emscripten` target. This target is known to have major
3338 defects. Please test, report, and fix.
3339 * rustup no longer installs documentation by default. Run `rustup
3340 component add rust-docs` to install.
3341 * [Fix line stepping in debugger][37310]
3342 * [Enable line number debuginfo in releases][37280]
3347 * [Disable jemalloc on aarch64/powerpc/mips][37392]
3348 * [Add support for Fuchsia OS][37313]
3349 * [Detect local-rebuild by only MAJOR.MINOR version][37273]
3354 * [A number of forward-compatibility lints used by the compiler
3355 to gradually introduce language changes have been converted
3356 to deny by default][36894]:
3357 - ["use of inaccessible extern crate erroneously allowed"][36886]
3358 - ["type parameter default erroneously allowed in invalid location"][36887]
3359 - ["detects super or self keywords at the beginning of global path"][36888]
3360 - ["two overlapping inherent impls define an item with the same name
3361 were erroneously allowed"][36889]
3362 - ["floating-point constants cannot be used in patterns"][36890]
3363 - ["constants of struct or enum type can only be used in a pattern if
3364 the struct or enum has `#[derive(PartialEq, Eq)]`"][36891]
3365 - ["lifetimes or labels named `'_` were erroneously allowed"][36892]
3366 * [Prohibit patterns in trait methods without bodies][37378]
3367 * [The atomic `Ordering` enum may not be matched exhaustively][37351]
3368 * [Future-proofing `#[no_link]` breaks some obscure cases][37247]
3369 * [The `$crate` macro variable is accepted in fewer locations][37213]
3370 * [Impls specifying extra region requirements beyond the trait
3371 they implement are rejected][37167]
3372 * [Enums may not be unsized][37111]. Unsized enums are intended to
3373 work but never have. For now they are forbidden.
3374 * [Enforce the shadowing restrictions from RFC 1560 for today's macros][36767]
3376 [tier 2]: https://forge.rust-lang.org/platform-support.html
3377 [1.14rustup]: https://internals.rust-lang.org/t/beta-testing-rustup-rs/3316/204
3378 [1.14wasm]: https://users.rust-lang.org/t/compiling-to-the-web-with-rust-and-emscripten/7627
3379 [36430]: https://github.com/rust-lang/rust/pull/36430
3380 [36595]: https://github.com/rust-lang/rust/pull/36595
3381 [36595]: https://github.com/rust-lang/rust/pull/36595
3382 [36692]: https://github.com/rust-lang/rust/pull/36692
3383 [36767]: https://github.com/rust-lang/rust/pull/36767
3384 [36794]: https://github.com/rust-lang/rust/pull/36794
3385 [36798]: https://github.com/rust-lang/rust/pull/36798
3386 [36819]: https://github.com/rust-lang/rust/pull/36819
3387 [36822]: https://github.com/rust-lang/rust/pull/36822
3388 [36825]: https://github.com/rust-lang/rust/pull/36825
3389 [36843]: https://github.com/rust-lang/rust/pull/36843
3390 [36880]: https://github.com/rust-lang/rust/pull/36880
3391 [36886]: https://github.com/rust-lang/rust/issues/36886
3392 [36887]: https://github.com/rust-lang/rust/issues/36887
3393 [36888]: https://github.com/rust-lang/rust/issues/36888
3394 [36889]: https://github.com/rust-lang/rust/issues/36889
3395 [36890]: https://github.com/rust-lang/rust/issues/36890
3396 [36891]: https://github.com/rust-lang/rust/issues/36891
3397 [36892]: https://github.com/rust-lang/rust/issues/36892
3398 [36894]: https://github.com/rust-lang/rust/pull/36894
3399 [36917]: https://github.com/rust-lang/rust/pull/36917
3400 [36993]: https://github.com/rust-lang/rust/pull/36993
3401 [37037]: https://github.com/rust-lang/rust/pull/37037
3402 [37064]: https://github.com/rust-lang/rust/pull/37064
3403 [37094]: https://github.com/rust-lang/rust/pull/37094
3404 [37108]: https://github.com/rust-lang/rust/pull/37108
3405 [37111]: https://github.com/rust-lang/rust/pull/37111
3406 [37161]: https://github.com/rust-lang/rust/pull/37161
3407 [37162]: https://github.com/rust-lang/rust/pull/37162
3408 [37167]: https://github.com/rust-lang/rust/pull/37167
3409 [37178]: https://github.com/rust-lang/rust/pull/37178
3410 [37200]: https://github.com/rust-lang/rust/pull/37200
3411 [37213]: https://github.com/rust-lang/rust/pull/37213
3412 [37221]: https://github.com/rust-lang/rust/pull/37221
3413 [37224]: https://github.com/rust-lang/rust/pull/37224
3414 [37230]: https://github.com/rust-lang/rust/pull/37230
3415 [37231]: https://github.com/rust-lang/rust/pull/37231
3416 [37247]: https://github.com/rust-lang/rust/pull/37247
3417 [37267]: https://github.com/rust-lang/rust/pull/37267
3418 [37270]: https://github.com/rust-lang/rust/pull/37270
3419 [37273]: https://github.com/rust-lang/rust/pull/37273
3420 [37280]: https://github.com/rust-lang/rust/pull/37280
3421 [37298]: https://github.com/rust-lang/rust/pull/37298
3422 [37306]: https://github.com/rust-lang/rust/pull/37306
3423 [37310]: https://github.com/rust-lang/rust/pull/37310
3424 [37312]: https://github.com/rust-lang/rust/pull/37312
3425 [37313]: https://github.com/rust-lang/rust/pull/37313
3426 [37315]: https://github.com/rust-lang/rust/pull/37315
3427 [37318]: https://github.com/rust-lang/rust/pull/37318
3428 [37322]: https://github.com/rust-lang/rust/pull/37322
3429 [37326]: https://github.com/rust-lang/rust/pull/37326
3430 [37351]: https://github.com/rust-lang/rust/pull/37351
3431 [37356]: https://github.com/rust-lang/rust/pull/37356
3432 [37367]: https://github.com/rust-lang/rust/pull/37367
3433 [37373]: https://github.com/rust-lang/rust/pull/37373
3434 [37378]: https://github.com/rust-lang/rust/pull/37378
3435 [37389]: https://github.com/rust-lang/rust/pull/37389
3436 [37392]: https://github.com/rust-lang/rust/pull/37392
3437 [37427]: https://github.com/rust-lang/rust/pull/37427
3438 [37439]: https://github.com/rust-lang/rust/pull/37439
3439 [37445]: https://github.com/rust-lang/rust/pull/37445
3440 [37470]: https://github.com/rust-lang/rust/pull/37470
3441 [37569]: https://github.com/rust-lang/rust/pull/37569
3442 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md
3443 [cargo/3175]: https://github.com/rust-lang/cargo/pull/3175
3444 [cargo/3220]: https://github.com/rust-lang/cargo/pull/3220
3445 [cargo/3243]: https://github.com/rust-lang/cargo/pull/3243
3446 [cargo/3249]: https://github.com/rust-lang/cargo/pull/3249
3447 [cargo/3259]: https://github.com/rust-lang/cargo/pull/3259
3448 [cargo/3280]: https://github.com/rust-lang/cargo/pull/3280
3451 Version 1.13.0 (2016-11-10)
3452 ===========================
3457 * [Stabilize the `?` operator][36995]. `?` is a simple way to propagate
3458 errors, like the `try!` macro, described in [RFC 0243].
3459 * [Stabilize macros in type position][36014]. Described in [RFC 873].
3460 * [Stabilize attributes on statements][36995]. Described in [RFC 0016].
3461 * [Fix `#[derive]` for empty tuple structs/variants][35728]
3462 * [Fix lifetime rules for 'if' conditions][36029]
3463 * [Avoid loading and parsing unconfigured non-inline modules][36482]
3468 * [Add the `-C link-arg` argument][36574]
3469 * [Remove the old AST-based backend from rustc_trans][35764]
3470 * [Don't enable NEON by default on armv7 Linux][35814]
3471 * [Fix debug line number info for macro expansions][35238]
3472 * [Do not emit "class method" debuginfo for types that are not
3473 DICompositeType][36008]
3474 * [Warn about multiple conflicting #[repr] hints][34623]
3475 * [When sizing DST, don't double-count nested struct prefixes][36351]
3476 * [Default RUST_MIN_STACK to 16MiB for now][36505]
3477 * [Improve rlib metadata format][36551]. Reduces rlib size significantly.
3478 * [Reject macros with empty repetitions to avoid infinite loop][36721]
3479 * [Expand macros without recursing to avoid stack overflows][36214]
3484 * [Replace macro backtraces with labeled local uses][35702]
3485 * [Improve error message for misplaced doc comments][33922]
3486 * [Buffer unix and lock windows to prevent message interleaving][35975]
3487 * [Update lifetime errors to specifically note temporaries][36171]
3488 * [Special case a few colors for Windows][36178]
3489 * [Suggest `use self` when such an import resolves][36289]
3490 * [Be more specific when type parameter shadows primitive type][36338]
3491 * Many minor improvements
3493 Compile-time Optimizations
3494 --------------------------
3496 * [Compute and cache HIR hashes at beginning][35854]
3497 * [Don't hash types in loan paths][36004]
3498 * [Cache projections in trans][35761]
3499 * [Optimize the parser's last token handling][36527]
3500 * [Only instantiate #[inline] functions in codegen units referencing
3501 them][36524]. This leads to big improvements in cases where crates export
3502 define many inline functions without using them directly.
3503 * [Lazily allocate TypedArena's first chunk][36592]
3504 * [Don't allocate during default HashSet creation][36734]
3511 * [`overflowing_abs`]
3512 * [`RefCell::try_borrow`]
3513 * [`RefCell::try_borrow_mut`]
3518 * [Add `assert_ne!` and `debug_assert_ne!`][35074]
3519 * [Make `vec_deque::Drain`, `hash_map::Drain`, and `hash_set::Drain`
3521 * [Implement `AsRef<[T]>` for `std::slice::Iter`][35559]
3522 * [Implement `Debug` for `std::vec::IntoIter`][35707]
3523 * [`CString`: avoid excessive growth just to 0-terminate][35871]
3524 * [Implement `CoerceUnsized` for `{Cell, RefCell, UnsafeCell}`][35627]
3525 * [Use arc4rand on FreeBSD][35884]
3526 * [memrchr: Correct aligned offset computation][35969]
3527 * [Improve Demangling of Rust Symbols][36059]
3528 * [Use monotonic time in condition variables][35048]
3529 * [Implement `Debug` for `std::path::{Components,Iter}`][36101]
3530 * [Implement conversion traits for `char`][35755]
3531 * [Fix illegal instruction caused by overflow in channel cloning][36104]
3532 * [Zero first byte of CString on drop][36264]
3533 * [Inherit overflow checks for sum and product][36372]
3534 * [Add missing Eq implementations][36423]
3535 * [Implement `Debug` for `DirEntry`][36631]
3536 * [When `getaddrinfo` returns `EAI_SYSTEM` retrieve actual error from
3538 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
3539 * [Implement more traits for `std::io::ErrorKind`][35911]
3540 * [Optimize BinaryHeap bounds checking][36072]
3541 * [Work around pointer aliasing issue in `Vec::extend_from_slice`,
3542 `extend_with_element`][36355]
3543 * [Fix overflow checking in unsigned pow()][34942]
3548 * This release includes security fixes to both curl and OpenSSL.
3549 * [Fix transitive doctests when panic=abort][cargo/3021]
3550 * [Add --all-features flag to cargo][cargo/3038]
3551 * [Reject path-based dependencies in `cargo package`][cargo/3060]
3552 * [Don't parse the home directory more than once][cargo/3078]
3553 * [Don't try to generate Cargo.lock on empty workspaces][cargo/3092]
3554 * [Update OpenSSL to 1.0.2j][cargo/3121]
3555 * [Add license and license_file to cargo metadata output][cargo/3110]
3556 * [Make crates-io registry URL optional in config; ignore all changes to
3557 source.crates-io][cargo/3089]
3558 * [Don't download dependencies from other platforms][cargo/3123]
3559 * [Build transitive dev-dependencies when needed][cargo/3125]
3560 * [Add support for per-target rustflags in .cargo/config][cargo/3157]
3561 * [Avoid updating registry when adding existing deps][cargo/3144]
3562 * [Warn about path overrides that won't work][cargo/3136]
3563 * [Use workspaces during `cargo install`][cargo/3146]
3564 * [Leak mspdbsrv.exe processes on Windows][cargo/3162]
3565 * [Add --message-format flag][cargo/3000]
3566 * [Pass target environment for rustdoc][cargo/3205]
3567 * [Use `CommandExt::exec` for `cargo run` on Unix][cargo/2818]
3568 * [Update curl and curl-sys][cargo/3241]
3569 * [Call rustdoc test with the correct cfg flags of a package][cargo/3242]
3574 * [rustdoc: Add the `--sysroot` argument][36586]
3575 * [rustdoc: Fix a couple of issues with the search results][35655]
3576 * [rustdoc: remove the `!` from macro URLs and titles][35234]
3577 * [gdb: Fix pretty-printing special-cased Rust types][35585]
3578 * [rustdoc: Filter more incorrect methods inherited through Deref][36266]
3583 * [Remove unmaintained style guide][35124]
3584 * [Add s390x support][36369]
3585 * [Initial work at Haiku OS support][36727]
3586 * [Add mips-uclibc targets][35734]
3587 * [Crate-ify compiler-rt into compiler-builtins][35021]
3588 * [Add rustc version info (git hash + date) to dist tarball][36213]
3589 * Many documentation improvements
3594 * [`SipHasher`] is deprecated. Use [`DefaultHasher`].
3595 * [Deny (by default) transmuting from fn item types to pointer-sized
3596 types][34923]. Continuing the long transition to zero-sized fn items,
3598 * [Fix `#[derive]` for empty tuple structs/variants][35728].
3600 * [Issue deprecation warnings for safe accesses to extern statics][36173]
3601 * [Fix lifetime rules for 'if' conditions][36029].
3602 * [Inherit overflow checks for sum and product][36372].
3603 * [Forbid user-defined macros named "macro_rules"][36730].
3605 [33922]: https://github.com/rust-lang/rust/pull/33922
3606 [34623]: https://github.com/rust-lang/rust/pull/34623
3607 [34923]: https://github.com/rust-lang/rust/pull/34923
3608 [34942]: https://github.com/rust-lang/rust/pull/34942
3609 [34982]: https://github.com/rust-lang/rust/pull/34982
3610 [35021]: https://github.com/rust-lang/rust/pull/35021
3611 [35048]: https://github.com/rust-lang/rust/pull/35048
3612 [35074]: https://github.com/rust-lang/rust/pull/35074
3613 [35124]: https://github.com/rust-lang/rust/pull/35124
3614 [35234]: https://github.com/rust-lang/rust/pull/35234
3615 [35238]: https://github.com/rust-lang/rust/pull/35238
3616 [35354]: https://github.com/rust-lang/rust/pull/35354
3617 [35559]: https://github.com/rust-lang/rust/pull/35559
3618 [35585]: https://github.com/rust-lang/rust/pull/35585
3619 [35627]: https://github.com/rust-lang/rust/pull/35627
3620 [35655]: https://github.com/rust-lang/rust/pull/35655
3621 [35702]: https://github.com/rust-lang/rust/pull/35702
3622 [35707]: https://github.com/rust-lang/rust/pull/35707
3623 [35728]: https://github.com/rust-lang/rust/pull/35728
3624 [35734]: https://github.com/rust-lang/rust/pull/35734
3625 [35755]: https://github.com/rust-lang/rust/pull/35755
3626 [35761]: https://github.com/rust-lang/rust/pull/35761
3627 [35764]: https://github.com/rust-lang/rust/pull/35764
3628 [35814]: https://github.com/rust-lang/rust/pull/35814
3629 [35854]: https://github.com/rust-lang/rust/pull/35854
3630 [35871]: https://github.com/rust-lang/rust/pull/35871
3631 [35884]: https://github.com/rust-lang/rust/pull/35884
3632 [35911]: https://github.com/rust-lang/rust/pull/35911
3633 [35969]: https://github.com/rust-lang/rust/pull/35969
3634 [35975]: https://github.com/rust-lang/rust/pull/35975
3635 [36004]: https://github.com/rust-lang/rust/pull/36004
3636 [36008]: https://github.com/rust-lang/rust/pull/36008
3637 [36014]: https://github.com/rust-lang/rust/pull/36014
3638 [36029]: https://github.com/rust-lang/rust/pull/36029
3639 [36059]: https://github.com/rust-lang/rust/pull/36059
3640 [36072]: https://github.com/rust-lang/rust/pull/36072
3641 [36101]: https://github.com/rust-lang/rust/pull/36101
3642 [36104]: https://github.com/rust-lang/rust/pull/36104
3643 [36171]: https://github.com/rust-lang/rust/pull/36171
3644 [36173]: https://github.com/rust-lang/rust/pull/36173
3645 [36178]: https://github.com/rust-lang/rust/pull/36178
3646 [36213]: https://github.com/rust-lang/rust/pull/36213
3647 [36214]: https://github.com/rust-lang/rust/pull/36214
3648 [36264]: https://github.com/rust-lang/rust/pull/36264
3649 [36266]: https://github.com/rust-lang/rust/pull/36266
3650 [36289]: https://github.com/rust-lang/rust/pull/36289
3651 [36338]: https://github.com/rust-lang/rust/pull/36338
3652 [36351]: https://github.com/rust-lang/rust/pull/36351
3653 [36355]: https://github.com/rust-lang/rust/pull/36355
3654 [36369]: https://github.com/rust-lang/rust/pull/36369
3655 [36372]: https://github.com/rust-lang/rust/pull/36372
3656 [36423]: https://github.com/rust-lang/rust/pull/36423
3657 [36482]: https://github.com/rust-lang/rust/pull/36482
3658 [36505]: https://github.com/rust-lang/rust/pull/36505
3659 [36524]: https://github.com/rust-lang/rust/pull/36524
3660 [36527]: https://github.com/rust-lang/rust/pull/36527
3661 [36551]: https://github.com/rust-lang/rust/pull/36551
3662 [36574]: https://github.com/rust-lang/rust/pull/36574
3663 [36586]: https://github.com/rust-lang/rust/pull/36586
3664 [36592]: https://github.com/rust-lang/rust/pull/36592
3665 [36631]: https://github.com/rust-lang/rust/pull/36631
3666 [36639]: https://github.com/rust-lang/rust/pull/36639
3667 [36721]: https://github.com/rust-lang/rust/pull/36721
3668 [36727]: https://github.com/rust-lang/rust/pull/36727
3669 [36730]: https://github.com/rust-lang/rust/pull/36730
3670 [36734]: https://github.com/rust-lang/rust/pull/36734
3671 [36754]: https://github.com/rust-lang/rust/pull/36754
3672 [36995]: https://github.com/rust-lang/rust/pull/36995
3673 [RFC 0016]: https://github.com/rust-lang/rfcs/blob/master/text/0016-more-attributes.md
3674 [RFC 0243]: https://github.com/rust-lang/rfcs/blob/master/text/0243-trait-based-exception-handling.md
3675 [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md
3676 [RFC 401]: https://github.com/rust-lang/rfcs/blob/master/text/0401-coercions.md
3677 [RFC 873]: https://github.com/rust-lang/rfcs/blob/master/text/0873-type-macros.md
3678 [cargo/2818]: https://github.com/rust-lang/cargo/pull/2818
3679 [cargo/3000]: https://github.com/rust-lang/cargo/pull/3000
3680 [cargo/3021]: https://github.com/rust-lang/cargo/pull/3021
3681 [cargo/3038]: https://github.com/rust-lang/cargo/pull/3038
3682 [cargo/3060]: https://github.com/rust-lang/cargo/pull/3060
3683 [cargo/3078]: https://github.com/rust-lang/cargo/pull/3078
3684 [cargo/3089]: https://github.com/rust-lang/cargo/pull/3089
3685 [cargo/3092]: https://github.com/rust-lang/cargo/pull/3092
3686 [cargo/3110]: https://github.com/rust-lang/cargo/pull/3110
3687 [cargo/3121]: https://github.com/rust-lang/cargo/pull/3121
3688 [cargo/3123]: https://github.com/rust-lang/cargo/pull/3123
3689 [cargo/3125]: https://github.com/rust-lang/cargo/pull/3125
3690 [cargo/3136]: https://github.com/rust-lang/cargo/pull/3136
3691 [cargo/3144]: https://github.com/rust-lang/cargo/pull/3144
3692 [cargo/3146]: https://github.com/rust-lang/cargo/pull/3146
3693 [cargo/3157]: https://github.com/rust-lang/cargo/pull/3157
3694 [cargo/3162]: https://github.com/rust-lang/cargo/pull/3162
3695 [cargo/3205]: https://github.com/rust-lang/cargo/pull/3205
3696 [cargo/3241]: https://github.com/rust-lang/cargo/pull/3241
3697 [cargo/3242]: https://github.com/rust-lang/cargo/pull/3242
3698 [rustup]: https://www.rustup.rs
3699 [`checked_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.checked_abs
3700 [`wrapping_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.wrapping_abs
3701 [`overflowing_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.overflowing_abs
3702 [`RefCell::try_borrow`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow
3703 [`RefCell::try_borrow_mut`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow_mut
3704 [`SipHasher`]: https://doc.rust-lang.org/std/hash/struct.SipHasher.html
3705 [`DefaultHasher`]: https://doc.rust-lang.org/std/collections/hash_map/struct.DefaultHasher.html
3708 Version 1.12.1 (2016-10-20)
3709 ===========================
3714 * [ICE: 'rustc' panicked at 'assertion failed: concrete_substs.is_normalized_for_trans()' #36381][36381]
3715 * [Confusion with double negation and booleans][36856]
3716 * [rustc 1.12.0 fails with SIGSEGV in release mode (syn crate 0.8.0)][36875]
3717 * [Rustc 1.12.0 Windows build of `ethcore` crate fails with LLVM error][36924]
3718 * [1.12.0: High memory usage when linking in release mode with debug info][36926]
3719 * [Corrupted memory after updated to 1.12][36936]
3720 * ["Let NullaryConstructor = something;" causes internal compiler error: "tried to overwrite interned AdtDef"][37026]
3721 * [Fix ICE: inject bitcast if types mismatch for invokes/calls/stores][37112]
3722 * [debuginfo: Handle spread_arg case in MIR-trans in a more stable way.][37153]
3724 [36381]: https://github.com/rust-lang/rust/issues/36381
3725 [36856]: https://github.com/rust-lang/rust/issues/36856
3726 [36875]: https://github.com/rust-lang/rust/issues/36875
3727 [36924]: https://github.com/rust-lang/rust/issues/36924
3728 [36926]: https://github.com/rust-lang/rust/issues/36926
3729 [36936]: https://github.com/rust-lang/rust/issues/36936
3730 [37026]: https://github.com/rust-lang/rust/issues/37026
3731 [37112]: https://github.com/rust-lang/rust/issues/37112
3732 [37153]: https://github.com/rust-lang/rust/issues/37153
3735 Version 1.12.0 (2016-09-29)
3736 ===========================
3741 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)](https://github.com/rust-lang/rust/pull/34096).
3742 This translation pass is far simpler than the previous AST->LLVM pass, and
3743 creates opportunities to perform new optimizations directly on the MIR. It
3744 was previously described [on the Rust blog](https://blog.rust-lang.org/2016/04/19/MIR.html).
3745 * [`rustc` presents a new, more readable error format, along with
3746 machine-readable JSON error output for use by IDEs](https://github.com/rust-lang/rust/pull/35401).
3747 Most common editors supporting Rust have been updated to work with it. It was
3748 previously described [on the Rust blog](https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
3753 * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)](https://github.com/rust-lang/rust/pull/34096).
3754 This translation pass is far simpler than the previous AST->LLVM pass, and
3755 creates opportunities to perform new optimizations directly on the MIR. It
3756 was previously described [on the Rust blog](https://blog.rust-lang.org/2016/04/19/MIR.html).
3757 * [Print the Rust target name, not the LLVM target name, with
3758 `--print target-list`](https://github.com/rust-lang/rust/pull/35489)
3759 * [The computation of `TypeId` is correct in some cases where it was previously
3760 producing inconsistent results](https://github.com/rust-lang/rust/pull/35267)
3761 * [The `mips-unknown-linux-gnu` target uses hardware floating point by default](https://github.com/rust-lang/rust/pull/34910)
3762 * [The `rustc` arguments, `--print target-cpus`, `--print target-features`,
3763 `--print relocation-models`, and `--print code-models` print the available
3764 options to the `-C target-cpu`, `-C target-feature`, `-C relocation-model` and
3765 `-C code-model` code generation arguments](https://github.com/rust-lang/rust/pull/34845)
3766 * [`rustc` supports three new MUSL targets on ARM: `arm-unknown-linux-musleabi`,
3767 `arm-unknown-linux-musleabihf`, and `armv7-unknown-linux-musleabihf`](https://github.com/rust-lang/rust/pull/35060).
3768 These targets produce statically-linked binaries. There are no binary release
3774 * [`rustc` presents a new, more readable error format, along with
3775 machine-readable JSON error output for use by IDEs](https://github.com/rust-lang/rust/pull/35401).
3776 Most common editors supporting Rust have been updated to work with it. It was
3777 previously described [on the Rust blog](https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html).
3778 * [In error descriptions, references are now described in plain English,
3779 instead of as "&-ptr"](https://github.com/rust-lang/rust/pull/35611)
3780 * [In error type descriptions, unknown numeric types are named `{integer}` or
3781 `{float}` instead of `_`](https://github.com/rust-lang/rust/pull/35080)
3782 * [`rustc` emits a clearer error when inner attributes follow a doc comment](https://github.com/rust-lang/rust/pull/34676)
3787 * [`macro_rules!` invocations can be made within `macro_rules!` invocations](https://github.com/rust-lang/rust/pull/34925)
3788 * [`macro_rules!` meta-variables are hygienic](https://github.com/rust-lang/rust/pull/35453)
3789 * [`macro_rules!` `tt` matchers can be reparsed correctly, making them much more
3790 useful](https://github.com/rust-lang/rust/pull/34908)
3791 * [`macro_rules!` `stmt` matchers correctly consume the entire contents when
3792 inside non-braces invocations](https://github.com/rust-lang/rust/pull/34886)
3793 * [Semicolons are properly required as statement delimiters inside
3794 `macro_rules!` invocations](https://github.com/rust-lang/rust/pull/34660)
3795 * [`cfg_attr` works on `path` attributes](https://github.com/rust-lang/rust/pull/34546)
3800 * [`Cell::as_ptr`](https://doc.rust-lang.org/std/cell/struct.Cell.html#method.as_ptr)
3801 * [`RefCell::as_ptr`](https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.as_ptr)
3802 * [`IpAddr::is_unspecified`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_unspecified)
3803 * [`IpAddr::is_loopback`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_loopback)
3804 * [`IpAddr::is_multicast`](https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_multicast)
3805 * [`Ipv4Addr::is_unspecified`](https://doc.rust-lang.org/std/net/struct.Ipv4Addr.html#method.is_unspecified)
3806 * [`Ipv6Addr::octets`](https://doc.rust-lang.org/std/net/struct.Ipv6Addr.html#method.octets)
3807 * [`LinkedList::contains`](https://doc.rust-lang.org/std/collections/linked_list/struct.LinkedList.html#method.contains)
3808 * [`VecDeque::contains`](https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.contains)
3809 * [`ExitStatusExt::from_raw`](https://doc.rust-lang.org/std/os/unix/process/trait.ExitStatusExt.html#tymethod.from_raw).
3810 Both on Unix and Windows.
3811 * [`Receiver::recv_timeout`](https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.recv_timeout)
3812 * [`RecvTimeoutError`](https://doc.rust-lang.org/std/sync/mpsc/enum.RecvTimeoutError.html)
3813 * [`BinaryHeap::peek_mut`](https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.peek_mut)
3814 * [`PeekMut`](https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html)
3815 * [`iter::Product`](https://doc.rust-lang.org/std/iter/trait.Product.html)
3816 * [`iter::Sum`](https://doc.rust-lang.org/std/iter/trait.Sum.html)
3817 * [`OccupiedEntry::remove_entry`](https://doc.rust-lang.org/std/collections/btree_map/struct.OccupiedEntry.html#method.remove_entry)
3818 * [`VacantEntry::into_key`](https://doc.rust-lang.org/std/collections/btree_map/struct.VacantEntry.html#method.into_key)
3823 * [The `format!` macro and friends now allow a single argument to be formatted
3824 in multiple styles](https://github.com/rust-lang/rust/pull/33642)
3825 * [The lifetime bounds on `[T]::binary_search_by` and
3826 `[T]::binary_search_by_key` have been adjusted to be more flexible](https://github.com/rust-lang/rust/pull/34762)
3827 * [`Option` implements `From` for its contained type](https://github.com/rust-lang/rust/pull/34828)
3828 * [`Cell`, `RefCell` and `UnsafeCell` implement `From` for their contained type](https://github.com/rust-lang/rust/pull/35392)
3829 * [`RwLock` panics if the reader count overflows](https://github.com/rust-lang/rust/pull/35378)
3830 * [`vec_deque::Drain`, `hash_map::Drain` and `hash_set::Drain` are covariant](https://github.com/rust-lang/rust/pull/35354)
3831 * [`vec::Drain` and `binary_heap::Drain` are covariant](https://github.com/rust-lang/rust/pull/34951)
3832 * [`Cow<str>` implements `FromIterator` for `char`, `&str` and `String`](https://github.com/rust-lang/rust/pull/35064)
3833 * [Sockets on Linux are correctly closed in subprocesses via `SOCK_CLOEXEC`](https://github.com/rust-lang/rust/pull/34946)
3834 * [`hash_map::Entry`, `hash_map::VacantEntry` and `hash_map::OccupiedEntry`
3835 implement `Debug`](https://github.com/rust-lang/rust/pull/34937)
3836 * [`btree_map::Entry`, `btree_map::VacantEntry` and `btree_map::OccupiedEntry`
3837 implement `Debug`](https://github.com/rust-lang/rust/pull/34885)
3838 * [`String` implements `AddAssign`](https://github.com/rust-lang/rust/pull/34890)
3839 * [Variadic `extern fn` pointers implement the `Clone`, `PartialEq`, `Eq`,
3840 `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and `fmt::Debug` traits](https://github.com/rust-lang/rust/pull/34879)
3841 * [`FileType` implements `Debug`](https://github.com/rust-lang/rust/pull/34757)
3842 * [References to `Mutex` and `RwLock` are unwind-safe](https://github.com/rust-lang/rust/pull/34756)
3843 * [`mpsc::sync_channel` `Receiver`s return any available message before
3844 reporting a disconnect](https://github.com/rust-lang/rust/pull/34731)
3845 * [Unicode definitions have been updated to 9.0](https://github.com/rust-lang/rust/pull/34599)
3846 * [`env` iterators implement `DoubleEndedIterator`](https://github.com/rust-lang/rust/pull/33312)
3851 * [Support local mirrors of registries](https://github.com/rust-lang/cargo/pull/2857)
3852 * [Add support for command aliases](https://github.com/rust-lang/cargo/pull/2679)
3853 * [Allow `opt-level="s"` / `opt-level="z"` in profile overrides](https://github.com/rust-lang/cargo/pull/3007)
3854 * [Make `cargo doc --open --target` work as expected](https://github.com/rust-lang/cargo/pull/2988)
3855 * [Speed up noop registry updates](https://github.com/rust-lang/cargo/pull/2974)
3856 * [Update OpenSSL](https://github.com/rust-lang/cargo/pull/2971)
3857 * [Fix `--panic=abort` with plugins](https://github.com/rust-lang/cargo/pull/2954)
3858 * [Always pass `-C metadata` to the compiler](https://github.com/rust-lang/cargo/pull/2946)
3859 * [Fix depending on git repos with workspaces](https://github.com/rust-lang/cargo/pull/2938)
3860 * [Add a `--lib` flag to `cargo new`](https://github.com/rust-lang/cargo/pull/2921)
3861 * [Add `http.cainfo` for custom certs](https://github.com/rust-lang/cargo/pull/2917)
3862 * [Indicate the compilation profile after compiling](https://github.com/rust-lang/cargo/pull/2909)
3863 * [Allow enabling features for dependencies with `--features`](https://github.com/rust-lang/cargo/pull/2876)
3864 * [Add `--jobs` flag to `cargo package`](https://github.com/rust-lang/cargo/pull/2867)
3865 * [Add `--dry-run` to `cargo publish`](https://github.com/rust-lang/cargo/pull/2849)
3866 * [Add support for `RUSTDOCFLAGS`](https://github.com/rust-lang/cargo/pull/2794)
3871 * [`panic::catch_unwind` is more optimized](https://github.com/rust-lang/rust/pull/35444)
3872 * [`panic::catch_unwind` no longer accesses thread-local storage on entry](https://github.com/rust-lang/rust/pull/34866)
3877 * [Test binaries now support a `--test-threads` argument to specify the number
3878 of threads used to run tests, and which acts the same as the
3879 `RUST_TEST_THREADS` environment variable](https://github.com/rust-lang/rust/pull/35414)
3880 * [The test runner now emits a warning when tests run over 60 seconds](https://github.com/rust-lang/rust/pull/35405)
3881 * [rustdoc: Fix methods in search results](https://github.com/rust-lang/rust/pull/34752)
3882 * [`rust-lldb` warns about unsupported versions of LLDB](https://github.com/rust-lang/rust/pull/34646)
3883 * [Rust releases now come with source packages that can be installed by rustup
3884 via `rustup component add rust-src`](https://github.com/rust-lang/rust/pull/34366).
3885 The resulting source code can be used by tools and IDES, located in the
3886 sysroot under `lib/rustlib/src`.
3891 * [The compiler can now be built against LLVM 3.9](https://github.com/rust-lang/rust/pull/35594)
3892 * Many minor improvements to the documentation.
3893 * [The Rust exception handling "personality" routine is now written in Rust](https://github.com/rust-lang/rust/pull/34832)
3898 * [When printing Windows `OsStr`s, unpaired surrogate codepoints are escaped
3899 with the lowercase format instead of the uppercase](https://github.com/rust-lang/rust/pull/35084)
3900 * [When formatting strings, if "precision" is specified, the "fill",
3901 "align" and "width" specifiers are no longer ignored](https://github.com/rust-lang/rust/pull/34544)
3902 * [The `Debug` impl for strings no longer escapes all non-ASCII characters](https://github.com/rust-lang/rust/pull/34485)
3905 Version 1.11.0 (2016-08-18)
3906 ===========================
3911 * [`cfg_attr` works on `path` attributes](https://github.com/rust-lang/rust/pull/34546)
3912 * [Support nested `cfg_attr` attributes](https://github.com/rust-lang/rust/pull/34216)
3913 * [Allow statement-generating braced macro invocations at the end of blocks](https://github.com/rust-lang/rust/pull/34436)
3914 * [Macros can be expanded inside of trait definitions](https://github.com/rust-lang/rust/pull/34213)
3915 * [`#[macro_use]` works properly when it is itself expanded from a macro](https://github.com/rust-lang/rust/pull/34032)
3920 * [`BinaryHeap::append`](https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.append)
3921 * [`BTreeMap::append`](https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.append)
3922 * [`BTreeMap::split_off`](https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.split_off)
3923 * [`BTreeSet::append`](https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.append)
3924 * [`BTreeSet::split_off`](https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.split_off)
3925 * [`f32::to_degrees`](https://doc.rust-lang.org/std/primitive.f32.html#method.to_degrees)
3926 (in libcore - previously stabilized in libstd)
3927 * [`f32::to_radians`](https://doc.rust-lang.org/std/primitive.f32.html#method.to_radians)
3928 (in libcore - previously stabilized in libstd)
3929 * [`f64::to_degrees`](https://doc.rust-lang.org/std/primitive.f64.html#method.to_degrees)
3930 (in libcore - previously stabilized in libstd)
3931 * [`f64::to_radians`](https://doc.rust-lang.org/std/primitive.f64.html#method.to_radians)
3932 (in libcore - previously stabilized in libstd)
3933 * [`Iterator::sum`](https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
3934 * [`Iterator::product`](https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum)
3935 * [`Cell::get_mut`](https://doc.rust-lang.org/std/cell/struct.Cell.html#method.get_mut)
3936 * [`RefCell::get_mut`](https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.get_mut)
3941 * [The `thread_local!` macro supports multiple definitions in a single
3942 invocation, and can apply attributes](https://github.com/rust-lang/rust/pull/34077)
3943 * [`Cow` implements `Default`](https://github.com/rust-lang/rust/pull/34305)
3944 * [`Wrapping` implements binary, octal, lower-hex and upper-hex
3945 `Display` formatting](https://github.com/rust-lang/rust/pull/34190)
3946 * [The range types implement `Hash`](https://github.com/rust-lang/rust/pull/34180)
3947 * [`lookup_host` ignores unknown address types](https://github.com/rust-lang/rust/pull/34067)
3948 * [`assert_eq!` accepts a custom error message, like `assert!` does](https://github.com/rust-lang/rust/pull/33976)
3949 * [The main thread is now called "main" instead of "<main>"](https://github.com/rust-lang/rust/pull/33803)
3954 * [Disallow specifying features of transitive deps](https://github.com/rust-lang/cargo/pull/2821)
3955 * [Add color support for Windows consoles](https://github.com/rust-lang/cargo/pull/2804)
3956 * [Fix `harness = false` on `[lib]` sections](https://github.com/rust-lang/cargo/pull/2795)
3957 * [Don't panic when `links` contains a '.'](https://github.com/rust-lang/cargo/pull/2787)
3958 * [Build scripts can emit warnings](https://github.com/rust-lang/cargo/pull/2630),
3959 and `-vv` prints warnings for all crates.
3960 * [Ignore file locks on OS X NFS mounts](https://github.com/rust-lang/cargo/pull/2720)
3961 * [Don't warn about `package.metadata` keys](https://github.com/rust-lang/cargo/pull/2668).
3962 This provides room for expansion by arbitrary tools.
3963 * [Add support for cdylib crate types](https://github.com/rust-lang/cargo/pull/2741)
3964 * [Prevent publishing crates when files are dirty](https://github.com/rust-lang/cargo/pull/2781)
3965 * [Don't fetch all crates on clean](https://github.com/rust-lang/cargo/pull/2704)
3966 * [Propagate --color option to rustc](https://github.com/rust-lang/cargo/pull/2779)
3967 * [Fix `cargo doc --open` on Windows](https://github.com/rust-lang/cargo/pull/2780)
3968 * [Improve autocompletion](https://github.com/rust-lang/cargo/pull/2772)
3969 * [Configure colors of stderr as well as stdout](https://github.com/rust-lang/cargo/pull/2739)
3974 * [Caching projections speeds up type check dramatically for some
3975 workloads](https://github.com/rust-lang/rust/pull/33816)
3976 * [The default `HashMap` hasher is SipHash 1-3 instead of SipHash 2-4](https://github.com/rust-lang/rust/pull/33940)
3977 This hasher is faster, but is believed to provide sufficient
3978 protection from collision attacks.
3979 * [Comparison of `Ipv4Addr` is 10x faster](https://github.com/rust-lang/rust/pull/33891)
3984 * [Fix empty implementation section on some module pages](https://github.com/rust-lang/rust/pull/34536)
3985 * [Fix inlined renamed re-exports in import lists](https://github.com/rust-lang/rust/pull/34479)
3986 * [Fix search result layout for enum variants and struct fields](https://github.com/rust-lang/rust/pull/34477)
3987 * [Fix issues with source links to external crates](https://github.com/rust-lang/rust/pull/34387)
3988 * [Fix redirect pages for renamed re-exports](https://github.com/rust-lang/rust/pull/34245)
3993 * [rustc is better at finding the MSVC toolchain](https://github.com/rust-lang/rust/pull/34492)
3994 * [When emitting debug info, rustc emits frame pointers for closures,
3995 shims and glue, as it does for all other functions](https://github.com/rust-lang/rust/pull/33909)
3996 * [rust-lldb warns about unsupported versions of LLDB](https://github.com/rust-lang/rust/pull/34646)
3997 * Many more errors have been given error codes and extended
3999 * API documentation continues to be improved, with many new examples
4004 * [rustc no longer hangs when dependencies recursively re-export
4005 submodules](https://github.com/rust-lang/rust/pull/34542)
4006 * [rustc requires LLVM 3.7+](https://github.com/rust-lang/rust/pull/34104)
4007 * [The 'How Safe and Unsafe Interact' chapter of The Rustonomicon was
4008 rewritten](https://github.com/rust-lang/rust/pull/33895)
4009 * [rustc support 16-bit pointer sizes](https://github.com/rust-lang/rust/pull/33460).
4010 No targets use this yet, but it works toward AVR support.
4015 * [`const`s and `static`s may not have unsized types](https://github.com/rust-lang/rust/pull/34443)
4016 * [The new follow-set rules that place restrictions on `macro_rules!`
4017 in order to ensure syntax forward-compatibility have been enabled](https://github.com/rust-lang/rust/pull/33982)
4018 This was an [amendment to RFC 550](https://github.com/rust-lang/rfcs/pull/1384),
4019 and has been a warning since 1.10.
4020 * [`cfg` attribute process has been refactored to fix various bugs](https://github.com/rust-lang/rust/pull/33706).
4021 This causes breakage in some corner cases.
4024 Version 1.10.0 (2016-07-07)
4025 ===========================
4030 * [Allow `concat_idents!` in type positions as well as in expression
4031 positions](https://github.com/rust-lang/rust/pull/33735).
4032 * [`Copy` types are required to have a trivial implementation of `Clone`](https://github.com/rust-lang/rust/pull/33420).
4033 [RFC 1521](https://github.com/rust-lang/rfcs/blob/master/text/1521-copy-clone-semantics.md).
4034 * [Single-variant enums support the `#[repr(..)]` attribute](https://github.com/rust-lang/rust/pull/33355).
4035 * [Fix `#[derive(RustcEncodable)]` in the presence of other `encode` methods](https://github.com/rust-lang/rust/pull/32908).
4036 * [`panic!` can be converted to a runtime abort with the
4037 `-C panic=abort` flag](https://github.com/rust-lang/rust/pull/32900).
4038 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
4039 * [Add a new crate type, 'cdylib'](https://github.com/rust-lang/rust/pull/33553).
4040 cdylibs are dynamic libraries suitable for loading by non-Rust hosts.
4041 [RFC 1510](https://github.com/rust-lang/rfcs/blob/master/text/1510-cdylib.md).
4042 Note that Cargo does not yet directly support cdylibs.
4047 * `os::windows::fs::OpenOptionsExt::access_mode`
4048 * `os::windows::fs::OpenOptionsExt::share_mode`
4049 * `os::windows::fs::OpenOptionsExt::custom_flags`
4050 * `os::windows::fs::OpenOptionsExt::attributes`
4051 * `os::windows::fs::OpenOptionsExt::security_qos_flags`
4052 * `os::unix::fs::OpenOptionsExt::custom_flags`
4053 * [`sync::Weak::new`](http://doc.rust-lang.org/alloc/arc/struct.Weak.html#method.new)
4054 * `Default for sync::Weak`
4055 * [`panic::set_hook`](http://doc.rust-lang.org/std/panic/fn.set_hook.html)
4056 * [`panic::take_hook`](http://doc.rust-lang.org/std/panic/fn.take_hook.html)
4057 * [`panic::PanicInfo`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html)
4058 * [`panic::PanicInfo::payload`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.payload)
4059 * [`panic::PanicInfo::location`](http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.location)
4060 * [`panic::Location`](http://doc.rust-lang.org/std/panic/struct.Location.html)
4061 * [`panic::Location::file`](http://doc.rust-lang.org/std/panic/struct.Location.html#method.file)
4062 * [`panic::Location::line`](http://doc.rust-lang.org/std/panic/struct.Location.html#method.line)
4063 * [`ffi::CStr::from_bytes_with_nul`](http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul)
4064 * [`ffi::CStr::from_bytes_with_nul_unchecked`](http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul_unchecked)
4065 * [`ffi::FromBytesWithNulError`](http://doc.rust-lang.org/std/ffi/struct.FromBytesWithNulError.html)
4066 * [`fs::Metadata::modified`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.modified)
4067 * [`fs::Metadata::accessed`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.accessed)
4068 * [`fs::Metadata::created`](http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.created)
4069 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange`
4070 * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange_weak`
4071 * `collections::{btree,hash}_map::{Occupied,Vacant,}Entry::key`
4072 * `os::unix::net::{UnixStream, UnixListener, UnixDatagram, SocketAddr}`
4073 * [`SocketAddr::is_unnamed`](http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.is_unnamed)
4074 * [`SocketAddr::as_pathname`](http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.as_pathname)
4075 * [`UnixStream::connect`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.connect)
4076 * [`UnixStream::pair`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.pair)
4077 * [`UnixStream::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.try_clone)
4078 * [`UnixStream::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.local_addr)
4079 * [`UnixStream::peer_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.peer_addr)
4080 * [`UnixStream::set_read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
4081 * [`UnixStream::set_write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
4082 * [`UnixStream::read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout)
4083 * [`UnixStream::write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout)
4084 * [`UnixStream::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.set_nonblocking)
4085 * [`UnixStream::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.take_error)
4086 * [`UnixStream::shutdown`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.shutdown)
4087 * Read/Write/RawFd impls for `UnixStream`
4088 * [`UnixListener::bind`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.bind)
4089 * [`UnixListener::accept`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.accept)
4090 * [`UnixListener::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.try_clone)
4091 * [`UnixListener::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.local_addr)
4092 * [`UnixListener::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.set_nonblocking)
4093 * [`UnixListener::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.take_error)
4094 * [`UnixListener::incoming`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.incoming)
4095 * RawFd impls for `UnixListener`
4096 * [`UnixDatagram::bind`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.bind)
4097 * [`UnixDatagram::unbound`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.unbound)
4098 * [`UnixDatagram::pair`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.pair)
4099 * [`UnixDatagram::connect`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.connect)
4100 * [`UnixDatagram::try_clone`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.try_clone)
4101 * [`UnixDatagram::local_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.local_addr)
4102 * [`UnixDatagram::peer_addr`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.peer_addr)
4103 * [`UnixDatagram::recv_from`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv_from)
4104 * [`UnixDatagram::recv`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv)
4105 * [`UnixDatagram::send_to`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send_to)
4106 * [`UnixDatagram::send`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send)
4107 * [`UnixDatagram::set_read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_read_timeout)
4108 * [`UnixDatagram::set_write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_write_timeout)
4109 * [`UnixDatagram::read_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.read_timeout)
4110 * [`UnixDatagram::write_timeout`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.write_timeout)
4111 * [`UnixDatagram::set_nonblocking`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_nonblocking)
4112 * [`UnixDatagram::take_error`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.take_error)
4113 * [`UnixDatagram::shutdown`](http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.shutdown)
4114 * RawFd impls for `UnixDatagram`
4115 * `{BTree,Hash}Map::values_mut`
4116 * [`<[_]>::binary_search_by_key`](http://doc.rust-lang.org/std/primitive.slice.html#method.binary_search_by_key)
4121 * [The `abs_sub` method of floats is deprecated](https://github.com/rust-lang/rust/pull/33664).
4122 The semantics of this minor method are subtle and probably not what
4124 * [Add implementation of Ord for Cell<T> and RefCell<T> where T: Ord](https://github.com/rust-lang/rust/pull/33306).
4125 * [On Linux, if `HashMap`s can't be initialized with `getrandom` they
4126 will fall back to `/dev/urandom` temporarily to avoid blocking
4127 during early boot](https://github.com/rust-lang/rust/pull/33086).
4128 * [Implemented negation for wrapping numerals](https://github.com/rust-lang/rust/pull/33067).
4129 * [Implement `Clone` for `binary_heap::IntoIter`](https://github.com/rust-lang/rust/pull/33050).
4130 * [Implement `Display` and `Hash` for `std::num::Wrapping`](https://github.com/rust-lang/rust/pull/33023).
4131 * [Add `Default` implementation for `&CStr`, `CString`](https://github.com/rust-lang/rust/pull/32990).
4132 * [Implement `From<Vec<T>>` and `Into<Vec<T>>` for `VecDeque<T>`](https://github.com/rust-lang/rust/pull/32866).
4133 * [Implement `Default` for `UnsafeCell`, `fmt::Error`, `Condvar`,
4134 `Mutex`, `RwLock`](https://github.com/rust-lang/rust/pull/32785).
4138 * [Cargo.toml supports the `profile.*.panic` option](https://github.com/rust-lang/cargo/pull/2687).
4139 This controls the runtime behavior of the `panic!` macro
4140 and can be either "unwind" (the default), or "abort".
4141 [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
4142 * [Don't throw away errors with `-p` arguments](https://github.com/rust-lang/cargo/pull/2723).
4143 * [Report status to stderr instead of stdout](https://github.com/rust-lang/cargo/pull/2693).
4144 * [Build scripts are passed a `CARGO_MANIFEST_LINKS` environment
4145 variable that corresponds to the `links` field of the manifest](https://github.com/rust-lang/cargo/pull/2710).
4146 * [Ban keywords from crate names](https://github.com/rust-lang/cargo/pull/2707).
4147 * [Canonicalize `CARGO_HOME` on Windows](https://github.com/rust-lang/cargo/pull/2604).
4148 * [Retry network requests](https://github.com/rust-lang/cargo/pull/2396).
4149 By default they are retried twice, which can be customized with the
4150 `net.retry` value in `.cargo/config`.
4151 * [Don't print extra error info for failing subcommands](https://github.com/rust-lang/cargo/pull/2674).
4152 * [Add `--force` flag to `cargo install`](https://github.com/rust-lang/cargo/pull/2405).
4153 * [Don't use `flock` on NFS mounts](https://github.com/rust-lang/cargo/pull/2623).
4154 * [Prefer building `cargo install` artifacts in temporary directories](https://github.com/rust-lang/cargo/pull/2610).
4155 Makes it possible to install multiple crates in parallel.
4156 * [Add `cargo test --doc`](https://github.com/rust-lang/cargo/pull/2578).
4157 * [Add `cargo --explain`](https://github.com/rust-lang/cargo/pull/2551).
4158 * [Don't print warnings when `-q` is passed](https://github.com/rust-lang/cargo/pull/2576).
4159 * [Add `cargo doc --lib` and `--bin`](https://github.com/rust-lang/cargo/pull/2577).
4160 * [Don't require build script output to be UTF-8](https://github.com/rust-lang/cargo/pull/2560).
4161 * [Correctly attempt multiple git usernames](https://github.com/rust-lang/cargo/pull/2584).
4166 * [rustc memory usage was reduced by refactoring the context used for
4167 type checking](https://github.com/rust-lang/rust/pull/33425).
4168 * [Speed up creation of `HashMap`s by caching the random keys used
4169 to initialize the hash state](https://github.com/rust-lang/rust/pull/33318).
4170 * [The `find` implementation for `Chain` iterators is 2x faster](https://github.com/rust-lang/rust/pull/33289).
4171 * [Trait selection optimizations speed up type checking by 15%](https://github.com/rust-lang/rust/pull/33138).
4172 * [Efficient trie lookup for boolean Unicode properties](https://github.com/rust-lang/rust/pull/33098).
4173 10x faster than the previous lookup tables.
4174 * [Special case `#[derive(Copy, Clone)]` to avoid bloat](https://github.com/rust-lang/rust/pull/31414).
4179 * Many incremental improvements to documentation and rustdoc.
4180 * [rustdoc: List blanket trait impls](https://github.com/rust-lang/rust/pull/33514).
4181 * [rustdoc: Clean up ABI rendering](https://github.com/rust-lang/rust/pull/33151).
4182 * [Indexing with the wrong type produces a more informative error](https://github.com/rust-lang/rust/pull/33401).
4183 * [Improve diagnostics for constants being used in irrefutable patterns](https://github.com/rust-lang/rust/pull/33406).
4184 * [When many method candidates are in scope limit the suggestions to 10](https://github.com/rust-lang/rust/pull/33338).
4185 * [Remove confusing suggestion when calling a `fn` type](https://github.com/rust-lang/rust/pull/33325).
4186 * [Do not suggest changing `&mut self` to `&mut mut self`](https://github.com/rust-lang/rust/pull/33319).
4191 * [Update i686-linux-android features to match Android ABI](https://github.com/rust-lang/rust/pull/33651).
4192 * [Update aarch64-linux-android features to match Android ABI](https://github.com/rust-lang/rust/pull/33500).
4193 * [`std` no longer prints backtraces on platforms where the running
4194 module must be loaded with `env::current_exe`, which can't be relied
4195 on](https://github.com/rust-lang/rust/pull/33554).
4196 * This release includes std binaries for the i586-unknown-linux-gnu,
4197 i686-unknown-linux-musl, and armv7-linux-androideabi targets. The
4198 i586 target is for old x86 hardware without SSE2, and the armv7
4199 target is for Android running on modern ARM architectures.
4200 * [The `rust-gdb` and `rust-lldb` scripts are distributed on all
4201 Unix platforms](https://github.com/rust-lang/rust/pull/32835).
4202 * [On Unix the runtime aborts by calling `libc::abort` instead of
4203 generating an illegal instruction](https://github.com/rust-lang/rust/pull/31457).
4204 * [Rust is now bootstrapped from the previous release of Rust,
4205 instead of a snapshot from an arbitrary commit](https://github.com/rust-lang/rust/pull/32942).
4210 * [`AtomicBool` is now bool-sized, not word-sized](https://github.com/rust-lang/rust/pull/33579).
4211 * [`target_env` for Linux ARM targets is just `gnu`, not
4212 `gnueabihf`, `gnueabi`, etc](https://github.com/rust-lang/rust/pull/33403).
4213 * [Consistently panic on overflow in `Duration::new`](https://github.com/rust-lang/rust/pull/33072).
4214 * [Change `String::truncate` to panic less](https://github.com/rust-lang/rust/pull/32977).
4215 * [Add `:block` to the follow set for `:ty` and `:path`](https://github.com/rust-lang/rust/pull/32945).
4216 Affects how macros are parsed.
4217 * [Fix macro hygiene bug](https://github.com/rust-lang/rust/pull/32923).
4218 * [Feature-gated attributes on macro-generated macro invocations are
4219 now rejected](https://github.com/rust-lang/rust/pull/32791).
4220 * [Suppress fallback and ambiguity errors during type inference](https://github.com/rust-lang/rust/pull/32258).
4221 This caused some minor changes to type inference.
4224 Version 1.9.0 (2016-05-26)
4225 ==========================
4230 * The `#[deprecated]` attribute when applied to an API will generate
4231 warnings when used. The warnings may be suppressed with
4232 `#[allow(deprecated)]`. [RFC 1270].
4233 * [`fn` item types are zero sized, and each `fn` names a unique
4234 type][1.9fn]. This will break code that transmutes `fn`s, so calling
4235 `transmute` on a `fn` type will generate a warning for a few cycles,
4236 then will be converted to an error.
4237 * [Field and method resolution understand visibility, so private
4238 fields and methods cannot prevent the proper use of public fields
4239 and methods][1.9fv].
4240 * [The parser considers unicode codepoints in the
4241 `PATTERN_WHITE_SPACE` category to be whitespace][1.9ws].
4247 * [`std::panic::catch_unwind`][] (renamed from `recover`)
4248 * [`std::panic::resume_unwind`][] (renamed from `propagate`)
4249 * [`std::panic::AssertUnwindSafe`][] (renamed from `AssertRecoverSafe`)
4250 * [`std::panic::UnwindSafe`][] (renamed from `RecoverSafe`)
4251 * [`str::is_char_boundary`]
4252 * [`<*const T>::as_ref`]
4253 * [`<*mut T>::as_ref`]
4254 * [`<*mut T>::as_mut`]
4255 * [`AsciiExt::make_ascii_uppercase`]
4256 * [`AsciiExt::make_ascii_lowercase`]
4257 * [`char::decode_utf16`]
4258 * [`char::DecodeUtf16`]
4259 * [`char::DecodeUtf16Error`]
4260 * [`char::DecodeUtf16Error::unpaired_surrogate`]
4261 * [`BTreeSet::take`]
4262 * [`BTreeSet::replace`]
4265 * [`HashSet::replace`]
4267 * [`OsString::with_capacity`]
4268 * [`OsString::clear`]
4269 * [`OsString::capacity`]
4270 * [`OsString::reserve`]
4271 * [`OsString::reserve_exact`]
4272 * [`OsStr::is_empty`]
4274 * [`std::os::unix::thread`]
4277 * [`JoinHandleExt::as_pthread_t`]
4278 * [`JoinHandleExt::into_pthread_t`]
4279 * [`HashSet::hasher`]
4280 * [`HashMap::hasher`]
4281 * [`CommandExt::exec`]
4282 * [`File::try_clone`]
4283 * [`SocketAddr::set_ip`]
4284 * [`SocketAddr::set_port`]
4285 * [`SocketAddrV4::set_ip`]
4286 * [`SocketAddrV4::set_port`]
4287 * [`SocketAddrV6::set_ip`]
4288 * [`SocketAddrV6::set_port`]
4289 * [`SocketAddrV6::set_flowinfo`]
4290 * [`SocketAddrV6::set_scope_id`]
4291 * [`slice::copy_from_slice`]
4292 * [`ptr::read_volatile`]
4293 * [`ptr::write_volatile`]
4294 * [`OpenOptions::create_new`]
4295 * [`TcpStream::set_nodelay`]
4296 * [`TcpStream::nodelay`]
4297 * [`TcpStream::set_ttl`]
4298 * [`TcpStream::ttl`]
4299 * [`TcpStream::set_only_v6`]
4300 * [`TcpStream::only_v6`]
4301 * [`TcpStream::take_error`]
4302 * [`TcpStream::set_nonblocking`]
4303 * [`TcpListener::set_ttl`]
4304 * [`TcpListener::ttl`]
4305 * [`TcpListener::set_only_v6`]
4306 * [`TcpListener::only_v6`]
4307 * [`TcpListener::take_error`]
4308 * [`TcpListener::set_nonblocking`]
4309 * [`UdpSocket::set_broadcast`]
4310 * [`UdpSocket::broadcast`]
4311 * [`UdpSocket::set_multicast_loop_v4`]
4312 * [`UdpSocket::multicast_loop_v4`]
4313 * [`UdpSocket::set_multicast_ttl_v4`]
4314 * [`UdpSocket::multicast_ttl_v4`]
4315 * [`UdpSocket::set_multicast_loop_v6`]
4316 * [`UdpSocket::multicast_loop_v6`]
4317 * [`UdpSocket::set_multicast_ttl_v6`]
4318 * [`UdpSocket::multicast_ttl_v6`]
4319 * [`UdpSocket::set_ttl`]
4320 * [`UdpSocket::ttl`]
4321 * [`UdpSocket::set_only_v6`]
4322 * [`UdpSocket::only_v6`]
4323 * [`UdpSocket::join_multicast_v4`]
4324 * [`UdpSocket::join_multicast_v6`]
4325 * [`UdpSocket::leave_multicast_v4`]
4326 * [`UdpSocket::leave_multicast_v6`]
4327 * [`UdpSocket::take_error`]
4328 * [`UdpSocket::connect`]
4329 * [`UdpSocket::send`]
4330 * [`UdpSocket::recv`]
4331 * [`UdpSocket::set_nonblocking`]
4336 * [`std::sync::Once` is poisoned if its initialization function
4338 * [`cell::Ref` and `cell::RefMut` can contain unsized types][1.9cu].
4339 * [Most types implement `fmt::Debug`][1.9db].
4340 * [The default buffer size used by `BufReader` and `BufWriter` was
4341 reduced to 8K, from 64K][1.9bf]. This is in line with the buffer size
4342 used by other languages.
4343 * [`Instant`, `SystemTime` and `Duration` implement `+=` and `-=`.
4344 `Duration` additionally implements `*=` and `/=`][1.9ta].
4345 * [`Skip` is a `DoubleEndedIterator`][1.9sk].
4346 * [`From<[u8; 4]>` is implemented for `Ipv4Addr`][1.9fi].
4347 * [`Chain` implements `BufRead`][1.9ch].
4348 * [`HashMap`, `HashSet` and iterators are covariant][1.9hc].
4353 * [Cargo can now run concurrently][1.9cc].
4354 * [Top-level overrides allow specific revisions of crates to be
4355 overridden through the entire crate graph][1.9ct]. This is intended
4356 to make upgrades easier for large projects, by allowing crates to be
4357 forked temporarily until they've been upgraded and republished.
4358 * [Cargo exports a `CARGO_PKG_AUTHORS` environment variable][1.9cp].
4359 * [Cargo will pass the contents of the `RUSTFLAGS` variable to `rustc`
4360 on the commandline][1.9cf]. `rustc` arguments can also be specified
4361 in the `build.rustflags` configuration key.
4366 * [The time complexity of comparing variables for equivalence during type
4367 unification is reduced from _O_(_n_!) to _O_(_n_)][1.9tu]. This leads
4368 to major compilation time improvement in some scenarios.
4369 * [`ToString` is specialized for `str`, giving it the same performance
4370 as `to_owned`][1.9ts].
4371 * [Spawning processes with `Command::output` no longer creates extra
4373 * [`#[derive(PartialEq)]` and `#[derive(PartialOrd)]` emit less code
4374 for C-like enums][1.9cl].
4379 * [Passing the `--quiet` flag to a test runner will produce
4380 much-abbreviated output][1.9q].
4381 * The Rust Project now publishes std binaries for the
4382 `mips-unknown-linux-musl`, `mipsel-unknown-linux-musl`, and
4383 `i586-pc-windows-msvc` targets.
4388 * [`std::sync::Once` is poisoned if its initialization function
4390 * [It is illegal to define methods with the same name in overlapping
4391 inherent `impl` blocks][1.9sn].
4392 * [`fn` item types are zero sized, and each `fn` names a unique
4393 type][1.9fn]. This will break code that transmutes `fn`s, so calling
4394 `transmute` on a `fn` type will generate a warning for a few cycles,
4395 then will be converted to an error.
4396 * [Improvements to const evaluation may trigger new errors when integer
4397 literals are out of range][1.9ce].
4400 [1.9bf]: https://github.com/rust-lang/rust/pull/32695
4401 [1.9cc]: https://github.com/rust-lang/cargo/pull/2486
4402 [1.9ce]: https://github.com/rust-lang/rust/pull/30587
4403 [1.9cf]: https://github.com/rust-lang/cargo/pull/2241
4404 [1.9ch]: https://github.com/rust-lang/rust/pull/32541
4405 [1.9cl]: https://github.com/rust-lang/rust/pull/31977
4406 [1.9cp]: https://github.com/rust-lang/cargo/pull/2465
4407 [1.9ct]: https://github.com/rust-lang/cargo/pull/2385
4408 [1.9cu]: https://github.com/rust-lang/rust/pull/32652
4409 [1.9db]: https://github.com/rust-lang/rust/pull/32054
4410 [1.9fi]: https://github.com/rust-lang/rust/pull/32050
4411 [1.9fn]: https://github.com/rust-lang/rust/pull/31710
4412 [1.9fv]: https://github.com/rust-lang/rust/pull/31938
4413 [1.9hc]: https://github.com/rust-lang/rust/pull/32635
4414 [1.9o]: https://github.com/rust-lang/rust/pull/32325
4415 [1.9q]: https://github.com/rust-lang/rust/pull/31887
4416 [1.9sk]: https://github.com/rust-lang/rust/pull/31700
4417 [1.9sn]: https://github.com/rust-lang/rust/pull/31925
4418 [1.9sp]: https://github.com/rust-lang/rust/pull/31618
4419 [1.9ta]: https://github.com/rust-lang/rust/pull/32448
4420 [1.9ts]: https://github.com/rust-lang/rust/pull/32586
4421 [1.9tu]: https://github.com/rust-lang/rust/pull/32062
4422 [1.9ws]: https://github.com/rust-lang/rust/pull/29734
4423 [RFC 1270]: https://github.com/rust-lang/rfcs/blob/master/text/1270-deprecation.md
4424 [`<*const T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
4425 [`<*mut T>::as_mut`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_mut
4426 [`<*mut T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref
4427 [`slice::copy_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.copy_from_slice
4428 [`AsciiExt::make_ascii_lowercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_lowercase
4429 [`AsciiExt::make_ascii_uppercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_uppercase
4430 [`BTreeSet::get`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.get
4431 [`BTreeSet::replace`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.replace
4432 [`BTreeSet::take`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.take
4433 [`CommandExt::exec`]: http://doc.rust-lang.org/nightly/std/os/unix/process/trait.CommandExt.html#tymethod.exec
4434 [`File::try_clone`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html#method.try_clone
4435 [`HashMap::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.hasher
4436 [`HashSet::get`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.get
4437 [`HashSet::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.hasher
4438 [`HashSet::replace`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.replace
4439 [`HashSet::take`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.take
4440 [`JoinHandleExt::as_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.as_pthread_t
4441 [`JoinHandleExt::into_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.into_pthread_t
4442 [`JoinHandleExt`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html
4443 [`OpenOptions::create_new`]: http://doc.rust-lang.org/nightly/std/fs/struct.OpenOptions.html#method.create_new
4444 [`OsStr::is_empty`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.is_empty
4445 [`OsStr::len`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.len
4446 [`OsString::capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.capacity
4447 [`OsString::clear`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.clear
4448 [`OsString::reserve_exact`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve_exact
4449 [`OsString::reserve`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve
4450 [`OsString::with_capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.with_capacity
4451 [`RawPthread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/type.RawPthread.html
4452 [`SocketAddr::set_ip`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_ip
4453 [`SocketAddr::set_port`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_port
4454 [`SocketAddrV4::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_ip
4455 [`SocketAddrV4::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_port
4456 [`SocketAddrV6::set_flowinfo`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_flowinfo
4457 [`SocketAddrV6::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_ip
4458 [`SocketAddrV6::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_port
4459 [`SocketAddrV6::set_scope_id`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_scope_id
4460 [`TcpListener::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
4461 [`TcpListener::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
4462 [`TcpListener::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
4463 [`TcpListener::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
4464 [`TcpListener::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
4465 [`TcpListener::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
4466 [`TcpStream::nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.nodelay
4467 [`TcpStream::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6
4468 [`TcpStream::set_nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nodelay
4469 [`TcpStream::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking
4470 [`TcpStream::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6
4471 [`TcpStream::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl
4472 [`TcpStream::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error
4473 [`TcpStream::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl
4474 [`UdpSocket::broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.broadcast
4475 [`UdpSocket::connect`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.connect
4476 [`UdpSocket::join_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v4
4477 [`UdpSocket::join_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v6
4478 [`UdpSocket::leave_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v4
4479 [`UdpSocket::leave_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v6
4480 [`UdpSocket::multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v4
4481 [`UdpSocket::multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v6
4482 [`UdpSocket::multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v4
4483 [`UdpSocket::multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v6
4484 [`UdpSocket::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.only_v6
4485 [`UdpSocket::recv`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.recv
4486 [`UdpSocket::send`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.send
4487 [`UdpSocket::set_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_broadcast
4488 [`UdpSocket::set_multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v4
4489 [`UdpSocket::set_multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v6
4490 [`UdpSocket::set_multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v4
4491 [`UdpSocket::set_multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v6
4492 [`UdpSocket::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_nonblocking
4493 [`UdpSocket::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_only_v6
4494 [`UdpSocket::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_ttl
4495 [`UdpSocket::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.take_error
4496 [`UdpSocket::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.ttl
4497 [`char::DecodeUtf16Error::unpaired_surrogate`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html#method.unpaired_surrogate
4498 [`char::DecodeUtf16Error`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html
4499 [`char::DecodeUtf16`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16.html
4500 [`char::decode_utf16`]: http://doc.rust-lang.org/nightly/std/char/fn.decode_utf16.html
4501 [`ptr::read_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.read_volatile.html
4502 [`ptr::write_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.write_volatile.html
4503 [`std::os::unix::thread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/index.html
4504 [`std::panic::AssertUnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/struct.AssertUnwindSafe.html
4505 [`std::panic::UnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/trait.UnwindSafe.html
4506 [`std::panic::catch_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.catch_unwind.html
4507 [`std::panic::resume_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.resume_unwind.html
4508 [`std::panic`]: http://doc.rust-lang.org/nightly/std/panic/index.html
4509 [`str::is_char_boundary`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.is_char_boundary
4512 Version 1.8.0 (2016-04-14)
4513 ==========================
4518 * Rust supports overloading of compound assignment statements like
4519 `+=` by implementing the [`AddAssign`], [`SubAssign`],
4520 [`MulAssign`], [`DivAssign`], [`RemAssign`], [`BitAndAssign`],
4521 [`BitOrAssign`], [`BitXorAssign`], [`ShlAssign`], or [`ShrAssign`]
4523 * Empty structs can be defined with braces, as in `struct Foo { }`, in
4524 addition to the non-braced form, `struct Foo;`. [RFC 218].
4530 * [`str::encode_utf16`][] (renamed from `utf16_units`)
4531 * [`str::EncodeUtf16`][] (renamed from `Utf16Units`)
4534 * [`ptr::drop_in_place`]
4536 * [`time::SystemTime`]
4538 * [`Instant::duration_since`][] (renamed from `duration_from_earlier`)
4539 * [`Instant::elapsed`]
4540 * [`SystemTime::now`]
4541 * [`SystemTime::duration_since`][] (renamed from `duration_from_earlier`)
4542 * [`SystemTime::elapsed`]
4543 * Various `Add`/`Sub` impls for `Time` and `SystemTime`
4544 * [`SystemTimeError`]
4545 * [`SystemTimeError::duration`]
4546 * Various impls for `SystemTimeError`
4548 * [`AddAssign`], [`SubAssign`], [`MulAssign`], [`DivAssign`],
4549 [`RemAssign`], [`BitAndAssign`], [`BitOrAssign`],
4550 [`BitXorAssign`], [`ShlAssign`], [`ShrAssign`].
4551 * [The `write!` and `writeln!` macros correctly emit errors if any of
4552 their arguments can't be formatted][1.8w].
4553 * [Various I/O functions support large files on 32-bit Linux][1.8l].
4554 * [The Unix-specific `raw` modules, which contain a number of
4555 redefined C types are deprecated][1.8r], including `os::raw::unix`,
4556 `os::raw::macos`, and `os::raw::linux`. These modules defined types
4557 such as `ino_t` and `dev_t`. The inconsistency of these definitions
4558 across platforms was making it difficult to implement `std`
4559 correctly. Those that need these definitions should use the `libc`
4561 * The Unix-specific `MetadataExt` traits, including
4562 `os::unix::fs::MetadataExt`, which expose values such as inode
4563 numbers [no longer return platform-specific types][1.8r], but
4564 instead return widened integers. [RFC 1415].
4565 * [`btree_set::{IntoIter, Iter, Range}` are covariant][1.8cv].
4566 * [Atomic loads and stores are not volatile][1.8a].
4567 * [All types in `sync::mpsc` implement `fmt::Debug`][1.8mp].
4572 * [Inlining hash functions lead to a 3% compile-time improvement in
4573 some workloads][1.8h].
4574 * When using jemalloc, its symbols are [unprefixed so that it
4575 overrides the libc malloc implementation][1.8h]. This means that for
4576 rustc, LLVM is now using jemalloc, which results in a 6%
4577 compile-time improvement on a specific workload.
4578 * [Avoid quadratic growth in function size due to cleanups][1.8cu].
4583 * [32-bit MSVC builds finally implement unwinding][1.8ms].
4584 i686-pc-windows-msvc is now considered a tier-1 platform.
4585 * [The `--print targets` flag prints a list of supported targets][1.8t].
4586 * [The `--print cfg` flag prints the `cfg`s defined for the current
4588 * [`rustc` can be built with an new Cargo-based build system, written
4589 in Rust][1.8b]. It will eventually replace Rust's Makefile-based
4590 build system. To enable it configure with `configure --rustbuild`.
4591 * [Errors for non-exhaustive `match` patterns now list up to 3 missing
4592 variants while also indicating the total number of missing variants
4593 if more than 3][1.8m].
4594 * [Executable stacks are disabled on Linux and BSD][1.8nx].
4595 * The Rust Project now publishes binary releases of the standard
4596 library for a number of tier-2 targets:
4597 `armv7-unknown-linux-gnueabihf`, `powerpc-unknown-linux-gnu`,
4598 `powerpc64-unknown-linux-gnu`, `powerpc64le-unknown-linux-gnu`
4599 `x86_64-rumprun-netbsd`. These can be installed with
4600 tools such as [multirust][1.8mr].
4605 * [`cargo init` creates a new Cargo project in the current
4606 directory][1.8ci]. It is otherwise like `cargo new`.
4607 * [Cargo has configuration keys for `-v` and
4608 `--color`][1.8cc]. `verbose` and `color`, respectively, go in the
4609 `[term]` section of `.cargo/config`.
4610 * [Configuration keys that evaluate to strings or integers can be set
4611 via environment variables][1.8ce]. For example the `build.jobs` key
4612 can be set via `CARGO_BUILD_JOBS`. Environment variables take
4613 precedence over config files.
4614 * [Target-specific dependencies support Rust `cfg` syntax for
4615 describing targets][1.8cfg] so that dependencies for multiple
4616 targets can be specified together. [RFC 1361].
4617 * [The environment variables `CARGO_TARGET_ROOT`, `RUSTC`, and
4618 `RUSTDOC` take precedence over the `build.target-dir`,
4619 `build.rustc`, and `build.rustdoc` configuration values][1.8cv].
4620 * [The child process tree is killed on Windows when Cargo is
4622 * [The `build.target` configuration value sets the target platform,
4623 like `--target`][1.8ct].
4628 * [Unstable compiler flags have been further restricted][1.8u]. Since
4629 1.0 `-Z` flags have been considered unstable, and other flags that
4630 were considered unstable additionally required passing `-Z
4631 unstable-options` to access. Unlike unstable language and library
4632 features though, these options have been accessible on the stable
4633 release channel. Going forward, *new unstable flags will not be
4634 available on the stable release channel*, and old unstable flags
4635 will warn about their usage. In the future, all unstable flags will
4636 be unavailable on the stable release channel.
4637 * [It is no longer possible to `match` on empty enum variants using
4638 the `Variant(..)` syntax][1.8v]. This has been a warning since 1.6.
4639 * The Unix-specific `MetadataExt` traits, including
4640 `os::unix::fs::MetadataExt`, which expose values such as inode
4641 numbers [no longer return platform-specific types][1.8r], but
4642 instead return widened integers. [RFC 1415].
4643 * [Modules sourced from the filesystem cannot appear within arbitrary
4644 blocks, but only within other modules][1.8mf].
4645 * [`--cfg` compiler flags are parsed strictly as identifiers][1.8c].
4646 * On Unix, [stack overflow triggers a runtime abort instead of a
4648 * [`Command::spawn` and its equivalents return an error if any of
4649 its command-line arguments contain interior `NUL`s][1.8n].
4650 * [Tuple and unit enum variants from other crates are in the type
4652 * [On Windows `rustc` emits `.lib` files for the `staticlib` library
4653 type instead of `.a` files][1.8st]. Additionally, for the MSVC
4654 toolchain, `rustc` emits import libraries named `foo.dll.lib`
4655 instead of `foo.lib`.
4658 [1.8a]: https://github.com/rust-lang/rust/pull/30962
4659 [1.8b]: https://github.com/rust-lang/rust/pull/31123
4660 [1.8c]: https://github.com/rust-lang/rust/pull/31530
4661 [1.8cc]: https://github.com/rust-lang/cargo/pull/2397
4662 [1.8ce]: https://github.com/rust-lang/cargo/pull/2398
4663 [1.8cf]: https://github.com/rust-lang/rust/pull/31278
4664 [1.8cfg]: https://github.com/rust-lang/cargo/pull/2328
4665 [1.8ci]: https://github.com/rust-lang/cargo/pull/2081
4666 [1.8ck]: https://github.com/rust-lang/cargo/pull/2370
4667 [1.8ct]: https://github.com/rust-lang/cargo/pull/2335
4668 [1.8cu]: https://github.com/rust-lang/rust/pull/31390
4669 [1.8cv]: https://github.com/rust-lang/cargo/issues/2365
4670 [1.8cv]: https://github.com/rust-lang/rust/pull/30998
4671 [1.8h]: https://github.com/rust-lang/rust/pull/31460
4672 [1.8l]: https://github.com/rust-lang/rust/pull/31668
4673 [1.8m]: https://github.com/rust-lang/rust/pull/31020
4674 [1.8mf]: https://github.com/rust-lang/rust/pull/31534
4675 [1.8mp]: https://github.com/rust-lang/rust/pull/30894
4676 [1.8mr]: https://users.rust-lang.org/t/multirust-0-8-with-cross-std-installation/4901
4677 [1.8ms]: https://github.com/rust-lang/rust/pull/30448
4678 [1.8n]: https://github.com/rust-lang/rust/pull/31056
4679 [1.8nx]: https://github.com/rust-lang/rust/pull/30859
4680 [1.8r]: https://github.com/rust-lang/rust/pull/31551
4681 [1.8so]: https://github.com/rust-lang/rust/pull/31333
4682 [1.8st]: https://github.com/rust-lang/rust/pull/29520
4683 [1.8t]: https://github.com/rust-lang/rust/pull/31358
4684 [1.8tn]: https://github.com/rust-lang/rust/pull/30882
4685 [1.8u]: https://github.com/rust-lang/rust/pull/31793
4686 [1.8v]: https://github.com/rust-lang/rust/pull/31757
4687 [1.8w]: https://github.com/rust-lang/rust/pull/31904
4688 [RFC 1361]: https://github.com/rust-lang/rfcs/blob/master/text/1361-cargo-cfg-dependencies.md
4689 [RFC 1415]: https://github.com/rust-lang/rfcs/blob/master/text/1415-trim-std-os.md
4690 [RFC 218]: https://github.com/rust-lang/rfcs/blob/master/text/0218-empty-struct-with-braces.md
4691 [RFC 953]: https://github.com/rust-lang/rfcs/blob/master/text/0953-op-assign.md
4692 [`AddAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.AddAssign.html
4693 [`BitAndAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitAndAssign.html
4694 [`BitOrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitOrAssign.html
4695 [`BitXorAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitXorAssign.html
4696 [`DivAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.DivAssign.html
4697 [`Instant::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.duration_since
4698 [`Instant::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.elapsed
4699 [`Instant::now`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.now
4700 [`MulAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.MulAssign.html
4701 [`Ref::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.Ref.html#method.map
4702 [`RefMut::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.RefMut.html#method.map
4703 [`RemAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.RemAssign.html
4704 [`ShlAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShlAssign.html
4705 [`ShrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShrAssign.html
4706 [`SubAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.SubAssign.html
4707 [`SystemTime::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.duration_since
4708 [`SystemTime::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.elapsed
4709 [`SystemTime::now`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.now
4710 [`SystemTimeError::duration`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html#method.duration
4711 [`SystemTimeError`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html
4712 [`UNIX_EPOCH`]: http://doc.rust-lang.org/nightly/std/time/constant.UNIX_EPOCH.html
4713 [`ptr::drop_in_place`]: http://doc.rust-lang.org/nightly/std/ptr/fn.drop_in_place.html
4714 [`str::EncodeUtf16`]: http://doc.rust-lang.org/nightly/std/str/struct.EncodeUtf16.html
4715 [`str::encode_utf16`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.encode_utf16
4716 [`time::Instant`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html
4717 [`time::SystemTime`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html
4720 Version 1.7.0 (2016-03-03)
4721 ==========================
4728 * [`Path::strip_prefix`][] (renamed from relative_from)
4729 * [`path::StripPrefixError`][] (new error type returned from strip_prefix)
4731 * [`Ipv4Addr::is_loopback`]
4732 * [`Ipv4Addr::is_private`]
4733 * [`Ipv4Addr::is_link_local`]
4734 * [`Ipv4Addr::is_multicast`]
4735 * [`Ipv4Addr::is_broadcast`]
4736 * [`Ipv4Addr::is_documentation`]
4738 * [`Ipv6Addr::is_unspecified`]
4739 * [`Ipv6Addr::is_loopback`]
4740 * [`Ipv6Addr::is_multicast`]
4743 * [`Vec::as_mut_slice`]
4745 * [`String::as_str`]
4746 * [`String::as_mut_str`]
4748 * `<[T]>::`[`clone_from_slice`], which now requires the two slices to
4750 * `<[T]>::`[`sort_by_key`]
4751 * checked, saturated, and overflowing operations
4752 * [`i32::checked_rem`], [`i32::checked_neg`], [`i32::checked_shl`], [`i32::checked_shr`]
4753 * [`i32::saturating_mul`]
4754 * [`i32::overflowing_add`], [`i32::overflowing_sub`], [`i32::overflowing_mul`], [`i32::overflowing_div`]
4755 * [`i32::overflowing_rem`], [`i32::overflowing_neg`], [`i32::overflowing_shl`], [`i32::overflowing_shr`]
4756 * [`u32::checked_rem`], [`u32::checked_neg`], [`u32::checked_shl`], [`u32::checked_shl`]
4757 * [`u32::saturating_mul`]
4758 * [`u32::overflowing_add`], [`u32::overflowing_sub`], [`u32::overflowing_mul`], [`u32::overflowing_div`]
4759 * [`u32::overflowing_rem`], [`u32::overflowing_neg`], [`u32::overflowing_shl`], [`u32::overflowing_shr`]
4760 * and checked, saturated, and overflowing operations for other primitive types
4762 * [`ffi::IntoStringError`]
4763 * [`CString::into_string`]
4764 * [`CString::into_bytes`]
4765 * [`CString::into_bytes_with_nul`]
4766 * `From<CString> for Vec<u8>`
4768 * [`IntoStringError::into_cstring`]
4769 * [`IntoStringError::utf8_error`]
4770 * `Error for IntoStringError`
4772 * [`std::hash::BuildHasher`]
4773 * [`BuildHasher::Hasher`]
4774 * [`BuildHasher::build_hasher`]
4775 * [`std::hash::BuildHasherDefault`]
4776 * [`HashMap::with_hasher`]
4777 * [`HashMap::with_capacity_and_hasher`]
4778 * [`HashSet::with_hasher`]
4779 * [`HashSet::with_capacity_and_hasher`]
4780 * [`std::collections::hash_map::RandomState`]
4781 * [`RandomState::new`]
4782 * [Validating UTF-8 is faster by a factor of between 7 and 14x for
4783 ASCII input][1.7utf8]. This means that creating `String`s and `str`s
4784 from bytes is faster.
4785 * [The performance of `LineWriter` (and thus `io::stdout`) was
4786 improved by using `memchr` to search for newlines][1.7m].
4787 * [`f32::to_degrees` and `f32::to_radians` are stable][1.7f]. The
4788 `f64` variants were stabilized previously.
4789 * [`BTreeMap` was rewritten to use less memory and improve the performance
4790 of insertion and iteration, the latter by as much as 5x][1.7bm].
4791 * [`BTreeSet` and its iterators, `Iter`, `IntoIter`, and `Range` are
4792 covariant over their contained type][1.7bt].
4793 * [`LinkedList` and its iterators, `Iter` and `IntoIter` are covariant
4794 over their contained type][1.7ll].
4795 * [`str::replace` now accepts a `Pattern`][1.7rp], like other string
4797 * [`Any` is implemented for unsized types][1.7a].
4798 * [`Hash` is implemented for `Duration`][1.7h].
4803 * [When running tests with `--test`, rustdoc will pass `--cfg`
4804 arguments to the compiler][1.7dt].
4805 * [The compiler is built with RPATH information by default][1.7rpa].
4806 This means that it will be possible to run `rustc` when installed in
4807 unusual configurations without configuring the dynamic linker search
4809 * [`rustc` passes `--enable-new-dtags` to GNU ld][1.7dta]. This makes
4810 any RPATH entries (emitted with `-C rpath`) *not* take precedence
4811 over `LD_LIBRARY_PATH`.
4816 * [`cargo rustc` accepts a `--profile` flag that runs `rustc` under
4817 any of the compilation profiles, 'dev', 'bench', or 'test'][1.7cp].
4818 * [The `rerun-if-changed` build script directive no longer causes the
4819 build script to incorrectly run twice in certain scenarios][1.7rr].
4824 * Soundness fixes to the interactions between associated types and
4825 lifetimes, specified in [RFC 1214], [now generate errors][1.7sf] for
4826 code that violates the new rules. This is a significant change that
4827 is known to break existing code, so it has emitted warnings for the
4828 new error cases since 1.4 to give crate authors time to adapt. The
4829 details of what is changing are subtle; read the RFC for more.
4830 * [Several bugs in the compiler's visibility calculations were
4831 fixed][1.7v]. Since this was found to break significant amounts of
4832 code, the new errors will be emitted as warnings for several release
4833 cycles, under the `private_in_public` lint.
4834 * Defaulted type parameters were accidentally accepted in positions
4835 that were not intended. In this release, [defaulted type parameters
4836 appearing outside of type definitions will generate a
4837 warning][1.7d], which will become an error in future releases.
4838 * [Parsing "." as a float results in an error instead of 0][1.7p].
4839 That is, `".".parse::<f32>()` returns `Err`, not `Ok(0.0)`.
4840 * [Borrows of closure parameters may not outlive the closure][1.7bc].
4842 [1.7a]: https://github.com/rust-lang/rust/pull/30928
4843 [1.7bc]: https://github.com/rust-lang/rust/pull/30341
4844 [1.7bm]: https://github.com/rust-lang/rust/pull/30426
4845 [1.7bt]: https://github.com/rust-lang/rust/pull/30998
4846 [1.7cp]: https://github.com/rust-lang/cargo/pull/2224
4847 [1.7d]: https://github.com/rust-lang/rust/pull/30724
4848 [1.7dt]: https://github.com/rust-lang/rust/pull/30372
4849 [1.7dta]: https://github.com/rust-lang/rust/pull/30394
4850 [1.7f]: https://github.com/rust-lang/rust/pull/30672
4851 [1.7h]: https://github.com/rust-lang/rust/pull/30818
4852 [1.7ll]: https://github.com/rust-lang/rust/pull/30663
4853 [1.7m]: https://github.com/rust-lang/rust/pull/30381
4854 [1.7p]: https://github.com/rust-lang/rust/pull/30681
4855 [1.7rp]: https://github.com/rust-lang/rust/pull/29498
4856 [1.7rpa]: https://github.com/rust-lang/rust/pull/30353
4857 [1.7rr]: https://github.com/rust-lang/cargo/pull/2279
4858 [1.7sf]: https://github.com/rust-lang/rust/pull/30389
4859 [1.7utf8]: https://github.com/rust-lang/rust/pull/30740
4860 [1.7v]: https://github.com/rust-lang/rust/pull/29973
4861 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
4862 [`BuildHasher::Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
4863 [`BuildHasher::build_hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html#tymethod.build_hasher
4864 [`CString::into_bytes_with_nul`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes_with_nul
4865 [`CString::into_bytes`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes
4866 [`CString::into_string`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_string
4867 [`HashMap::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_capacity_and_hasher
4868 [`HashMap::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_hasher
4869 [`HashSet::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_capacity_and_hasher
4870 [`HashSet::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_hasher
4871 [`IntoStringError::into_cstring`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.into_cstring
4872 [`IntoStringError::utf8_error`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.utf8_error
4873 [`Ipv4Addr::is_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_broadcast
4874 [`Ipv4Addr::is_documentation`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_documentation
4875 [`Ipv4Addr::is_link_local`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_link_local
4876 [`Ipv4Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_loopback
4877 [`Ipv4Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_multicast
4878 [`Ipv4Addr::is_private`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_private
4879 [`Ipv6Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_loopback
4880 [`Ipv6Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_multicast
4881 [`Ipv6Addr::is_unspecified`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_unspecified
4882 [`Path::strip_prefix`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.strip_prefix
4883 [`RandomState::new`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html#method.new
4884 [`String::as_mut_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_mut_str
4885 [`String::as_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_str
4886 [`Vec::as_mut_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_mut_slice
4887 [`Vec::as_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_slice
4888 [`clone_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.clone_from_slice
4889 [`ffi::IntoStringError`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html
4890 [`i32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_neg
4891 [`i32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_rem
4892 [`i32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shl
4893 [`i32::checked_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shr
4894 [`i32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_add
4895 [`i32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_div
4896 [`i32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_mul
4897 [`i32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_neg
4898 [`i32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_rem
4899 [`i32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shl
4900 [`i32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shr
4901 [`i32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_sub
4902 [`i32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.saturating_mul
4903 [`path::StripPrefixError`]: http://doc.rust-lang.org/nightly/std/path/struct.StripPrefixError.html
4904 [`sort_by_key`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.sort_by_key
4905 [`std::collections::hash_map::RandomState`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html
4906 [`std::hash::BuildHasherDefault`]: http://doc.rust-lang.org/nightly/std/hash/struct.BuildHasherDefault.html
4907 [`std::hash::BuildHasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html
4908 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
4909 [`u32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_rem
4910 [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg
4911 [`u32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_shl
4912 [`u32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_add
4913 [`u32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_div
4914 [`u32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_mul
4915 [`u32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_neg
4916 [`u32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_rem
4917 [`u32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shl
4918 [`u32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shr
4919 [`u32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_sub
4920 [`u32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.saturating_mul
4923 Version 1.6.0 (2016-01-21)
4924 ==========================
4929 * The `#![no_std]` attribute causes a crate to not be linked to the
4930 standard library, but only the [core library][1.6co], as described
4931 in [RFC 1184]. The core library defines common types and traits but
4932 has no platform dependencies whatsoever, and is the basis for Rust
4933 software in environments that cannot support a full port of the
4934 standard library, such as operating systems. Most of the core
4935 library is now stable.
4941 [`Read::read_exact`],
4942 [`ErrorKind::UnexpectedEof`][] (renamed from `UnexpectedEOF`),
4943 [`fs::DirBuilder`], [`fs::DirBuilder::new`],
4944 [`fs::DirBuilder::recursive`], [`fs::DirBuilder::create`],
4945 [`os::unix::fs::DirBuilderExt`],
4946 [`os::unix::fs::DirBuilderExt::mode`], [`vec::Drain`],
4947 [`vec::Vec::drain`], [`string::Drain`], [`string::String::drain`],
4948 [`vec_deque::Drain`], [`vec_deque::VecDeque::drain`],
4949 [`collections::hash_map::Drain`],
4950 [`collections::hash_map::HashMap::drain`],
4951 [`collections::hash_set::Drain`],
4952 [`collections::hash_set::HashSet::drain`],
4953 [`collections::binary_heap::Drain`],
4954 [`collections::binary_heap::BinaryHeap::drain`],
4955 [`Vec::extend_from_slice`][] (renamed from `push_all`),
4956 [`Mutex::get_mut`], [`Mutex::into_inner`], [`RwLock::get_mut`],
4957 [`RwLock::into_inner`],
4958 [`Iterator::min_by_key`][] (renamed from `min_by`),
4959 [`Iterator::max_by_key`][] (renamed from `max_by`).
4960 * The [core library][1.6co] is stable, as are most of its APIs.
4961 * [The `assert_eq!` macro supports arguments that don't implement
4962 `Sized`][1.6ae], such as arrays. In this way it behaves more like
4964 * Several timer functions that take duration in milliseconds [are
4965 deprecated in favor of those that take `Duration`][1.6ms]. These
4966 include `Condvar::wait_timeout_ms`, `thread::sleep_ms`, and
4967 `thread::park_timeout_ms`.
4968 * The algorithm by which `Vec` reserves additional elements was
4969 [tweaked to not allocate excessive space][1.6a] while still growing
4971 * `From` conversions are [implemented from integers to floats][1.6f]
4972 in cases where the conversion is lossless. Thus they are not
4973 implemented for 32-bit ints to `f32`, nor for 64-bit ints to `f32`
4974 or `f64`. They are also not implemented for `isize` and `usize`
4975 because the implementations would be platform-specific. `From` is
4976 also implemented from `f32` to `f64`.
4977 * `From<&Path>` and `From<PathBuf>` are implemented for `Cow<Path>`.
4978 * `From<T>` is implemented for `Box<T>`, `Rc<T>` and `Arc<T>`.
4979 * `IntoIterator` is implemented for `&PathBuf` and `&Path`.
4980 * [`BinaryHeap` was refactored][1.6bh] for modest performance
4982 * Sorting slices that are already sorted [is 50% faster in some
4988 * Cargo will look in `$CARGO_HOME/bin` for subcommands [by default][1.6c].
4989 * Cargo build scripts can specify their dependencies by emitting the
4990 [`rerun-if-changed`][1.6rr] key.
4991 * crates.io will reject publication of crates with dependencies that
4992 have a wildcard version constraint. Crates with wildcard
4993 dependencies were seen to cause a variety of problems, as described
4994 in [RFC 1241]. Since 1.5 publication of such crates has emitted a
4996 * `cargo clean` [accepts a `--release` flag][1.6cc] to clean the
4997 release folder. A variety of artifacts that Cargo failed to clean
4998 are now correctly deleted.
5003 * The `unreachable_code` lint [warns when a function call's argument
5005 * The parser indicates [failures that may be caused by
5006 confusingly-similar Unicode characters][1.6uc]
5007 * Certain macro errors [are reported at definition time][1.6m], not
5013 * The compiler no longer makes use of the [`RUST_PATH`][1.6rp]
5014 environment variable when locating crates. This was a pre-cargo
5015 feature for integrating with the package manager that was
5016 accidentally never removed.
5017 * [A number of bugs were fixed in the privacy checker][1.6p] that
5018 could cause previously-accepted code to break.
5019 * [Modules and unit/tuple structs may not share the same name][1.6ts].
5020 * [Bugs in pattern matching unit structs were fixed][1.6us]. The tuple
5021 struct pattern syntax (`Foo(..)`) can no longer be used to match
5022 unit structs. This is a warning now, but will become an error in
5023 future releases. Patterns that share the same name as a const are
5025 * A bug was fixed that causes [rustc not to apply default type
5026 parameters][1.6xc] when resolving certain method implementations of
5027 traits defined in other crates.
5029 [1.6a]: https://github.com/rust-lang/rust/pull/29454
5030 [1.6ae]: https://github.com/rust-lang/rust/pull/29770
5031 [1.6bh]: https://github.com/rust-lang/rust/pull/29811
5032 [1.6c]: https://github.com/rust-lang/cargo/pull/2192
5033 [1.6cc]: https://github.com/rust-lang/cargo/pull/2131
5034 [1.6co]: http://doc.rust-lang.org/core/index.html
5035 [1.6dv]: https://github.com/rust-lang/rust/pull/30000
5036 [1.6f]: https://github.com/rust-lang/rust/pull/29129
5037 [1.6m]: https://github.com/rust-lang/rust/pull/29828
5038 [1.6ms]: https://github.com/rust-lang/rust/pull/29604
5039 [1.6p]: https://github.com/rust-lang/rust/pull/29726
5040 [1.6rp]: https://github.com/rust-lang/rust/pull/30034
5041 [1.6rr]: https://github.com/rust-lang/cargo/pull/2134
5042 [1.6s]: https://github.com/rust-lang/rust/pull/29675
5043 [1.6ts]: https://github.com/rust-lang/rust/issues/21546
5044 [1.6uc]: https://github.com/rust-lang/rust/pull/29837
5045 [1.6us]: https://github.com/rust-lang/rust/pull/29383
5046 [1.6xc]: https://github.com/rust-lang/rust/issues/30123
5047 [RFC 1184]: https://github.com/rust-lang/rfcs/blob/master/text/1184-stabilize-no_std.md
5048 [RFC 1241]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
5049 [`ErrorKind::UnexpectedEof`]: http://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html#variant.UnexpectedEof
5050 [`Iterator::max_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.max_by_key
5051 [`Iterator::min_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.min_by_key
5052 [`Mutex::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.get_mut
5053 [`Mutex::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.into_inner
5054 [`Read::read_exact`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_exact
5055 [`RwLock::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.get_mut
5056 [`RwLock::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.into_inner
5057 [`Vec::extend_from_slice`]: http://doc.rust-lang.org/nightly/collections/vec/struct.Vec.html#method.extend_from_slice
5058 [`collections::binary_heap::BinaryHeap::drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.BinaryHeap.html#method.drain
5059 [`collections::binary_heap::Drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.Drain.html
5060 [`collections::hash_map::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.Drain.html
5061 [`collections::hash_map::HashMap::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.HashMap.html#method.drain
5062 [`collections::hash_set::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.Drain.html
5063 [`collections::hash_set::HashSet::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.HashSet.html#method.drain
5064 [`fs::DirBuilder::create`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.create
5065 [`fs::DirBuilder::new`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.new
5066 [`fs::DirBuilder::recursive`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.recursive
5067 [`fs::DirBuilder`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html
5068 [`os::unix::fs::DirBuilderExt::mode`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html#tymethod.mode
5069 [`os::unix::fs::DirBuilderExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html
5070 [`string::Drain`]: http://doc.rust-lang.org/nightly/std/string/struct.Drain.html
5071 [`string::String::drain`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.drain
5072 [`vec::Drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Drain.html
5073 [`vec::Vec::drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.drain
5074 [`vec_deque::Drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.Drain.html
5075 [`vec_deque::VecDeque::drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.VecDeque.html#method.drain
5078 Version 1.5.0 (2015-12-10)
5079 ==========================
5081 * ~700 changes, numerous bugfixes
5087 [`BinaryHeap::from`], [`BinaryHeap::into_sorted_vec`],
5088 [`BinaryHeap::into_vec`], [`Condvar::wait_timeout`],
5089 [`FileTypeExt::is_block_device`], [`FileTypeExt::is_char_device`],
5090 [`FileTypeExt::is_fifo`], [`FileTypeExt::is_socket`],
5091 [`FileTypeExt`], [`Formatter::alternate`], [`Formatter::fill`],
5092 [`Formatter::precision`], [`Formatter::sign_aware_zero_pad`],
5093 [`Formatter::sign_minus`], [`Formatter::sign_plus`],
5094 [`Formatter::width`], [`Iterator::cmp`], [`Iterator::eq`],
5095 [`Iterator::ge`], [`Iterator::gt`], [`Iterator::le`],
5096 [`Iterator::lt`], [`Iterator::ne`], [`Iterator::partial_cmp`],
5097 [`Path::canonicalize`], [`Path::exists`], [`Path::is_dir`],
5098 [`Path::is_file`], [`Path::metadata`], [`Path::read_dir`],
5099 [`Path::read_link`], [`Path::symlink_metadata`],
5100 [`Utf8Error::valid_up_to`], [`Vec::resize`],
5101 [`VecDeque::as_mut_slices`], [`VecDeque::as_slices`],
5102 [`VecDeque::insert`], [`VecDeque::shrink_to_fit`],
5103 [`VecDeque::swap_remove_back`], [`VecDeque::swap_remove_front`],
5104 [`slice::split_first_mut`], [`slice::split_first`],
5105 [`slice::split_last_mut`], [`slice::split_last`],
5106 [`char::from_u32_unchecked`], [`fs::canonicalize`],
5107 [`str::MatchIndices`], [`str::RMatchIndices`],
5108 [`str::match_indices`], [`str::rmatch_indices`],
5109 [`str::slice_mut_unchecked`], [`string::ParseError`].
5110 * Rust applications hosted on crates.io can be installed locally to
5111 `~/.cargo/bin` with the [`cargo install`] command. Among other
5112 things this makes it easier to augment Cargo with new subcommands:
5113 when a binary named e.g. `cargo-foo` is found in `$PATH` it can be
5114 invoked as `cargo foo`.
5115 * Crates with wildcard (`*`) dependencies will [emit warnings when
5116 published][1.5w]. In 1.6 it will no longer be possible to publish
5117 crates with wildcard dependencies.
5122 * The rules determining when a particular lifetime must outlive
5123 a particular value (known as '[dropck]') have been [modified
5124 to not rely on parametricity][1.5p].
5125 * [Implementations of `AsRef` and `AsMut` were added to `Box`, `Rc`,
5126 and `Arc`][1.5a]. Because these smart pointer types implement
5127 `Deref`, this causes breakage in cases where the interior type
5128 contains methods of the same name.
5129 * [Correct a bug in Rc/Arc][1.5c] that caused [dropck] to be unaware
5130 that they could drop their content. Soundness fix.
5131 * All method invocations are [properly checked][1.5wf1] for
5132 [well-formedness][1.5wf2]. Soundness fix.
5133 * Traits whose supertraits contain `Self` are [not object
5134 safe][1.5o]. Soundness fix.
5135 * Target specifications support a [`no_default_libraries`][1.5nd]
5136 setting that controls whether `-nodefaultlibs` is passed to the
5137 linker, and in turn the `is_like_windows` setting no longer affects
5138 the `-nodefaultlibs` flag.
5139 * `#[derive(Show)]`, long-deprecated, [has been removed][1.5ds].
5140 * The `#[inline]` and `#[repr]` attributes [can only appear
5141 in valid locations][1.5at].
5142 * Native libraries linked from the local crate are [passed to
5143 the linker before native libraries from upstream crates][1.5nl].
5144 * Two rarely-used attributes, `#[no_debug]` and
5145 `#[omit_gdb_pretty_printer_section]` [are feature gated][1.5fg].
5146 * Negation of unsigned integers, which has been a warning for
5147 several releases, [is now behind a feature gate and will
5148 generate errors][1.5nu].
5149 * The parser accidentally accepted visibility modifiers on
5150 enum variants, a bug [which has been fixed][1.5ev].
5151 * [A bug was fixed that allowed `use` statements to import unstable
5157 * When evaluating expressions at compile-time that are not
5158 compile-time constants (const-evaluating expressions in non-const
5159 contexts), incorrect code such as overlong bitshifts and arithmetic
5160 overflow will [generate a warning instead of an error][1.5ce],
5161 delaying the error until runtime. This will allow the
5162 const-evaluator to be expanded in the future backwards-compatibly.
5163 * The `improper_ctypes` lint [no longer warns about using `isize` and
5164 `usize` in FFI][1.5ict].
5169 * `Arc<T>` and `Rc<T>` are [covariant with respect to `T` instead of
5171 * `Default` is [implemented for mutable slices][1.5d].
5172 * `FromStr` is [implemented for `SockAddrV4` and `SockAddrV6`][1.5s].
5173 * There are now `From` conversions [between floating point
5174 types][1.5f] where the conversions are lossless.
5175 * There are now `From` conversions [between integer types][1.5i] where
5176 the conversions are lossless.
5177 * [`fs::Metadata` implements `Clone`][1.5fs].
5178 * The `parse` method [accepts a leading "+" when parsing
5180 * [`AsMut` is implemented for `Vec`][1.5am].
5181 * The `clone_from` implementations for `String` and `BinaryHeap` [have
5182 been optimized][1.5cf] and no longer rely on the default impl.
5183 * The `extern "Rust"`, `extern "C"`, `unsafe extern "Rust"` and
5184 `unsafe extern "C"` function types now [implement `Clone`,
5185 `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and
5186 `fmt::Debug` for up to 12 arguments][1.5fp].
5187 * [Dropping `Vec`s is much faster in unoptimized builds when the
5188 element types don't implement `Drop`][1.5dv].
5189 * A bug that caused in incorrect behavior when [combining `VecDeque`
5190 with zero-sized types][1.5vdz] was resolved.
5191 * [`PartialOrd` for slices is faster][1.5po].
5196 * [Crate metadata size was reduced by 20%][1.5md].
5197 * [Improvements to code generation reduced the size of libcore by 3.3
5198 MB and rustc's memory usage by 18MB][1.5m].
5199 * [Improvements to deref translation increased performance in
5200 unoptimized builds][1.5dr].
5201 * Various errors in trait resolution [are deduplicated to only be
5202 reported once][1.5te].
5203 * Rust has preliminary [support for rumprun kernels][1.5rr].
5204 * Rust has preliminary [support for NetBSD on amd64][1.5na].
5206 [1.5use]: https://github.com/rust-lang/rust/pull/28364
5207 [1.5po]: https://github.com/rust-lang/rust/pull/28436
5208 [1.5ev]: https://github.com/rust-lang/rust/pull/28442
5209 [1.5nu]: https://github.com/rust-lang/rust/pull/28468
5210 [1.5dr]: https://github.com/rust-lang/rust/pull/28491
5211 [1.5vdz]: https://github.com/rust-lang/rust/pull/28494
5212 [1.5md]: https://github.com/rust-lang/rust/pull/28521
5213 [1.5fg]: https://github.com/rust-lang/rust/pull/28522
5214 [1.5dv]: https://github.com/rust-lang/rust/pull/28531
5215 [1.5na]: https://github.com/rust-lang/rust/pull/28543
5216 [1.5fp]: https://github.com/rust-lang/rust/pull/28560
5217 [1.5rr]: https://github.com/rust-lang/rust/pull/28593
5218 [1.5cf]: https://github.com/rust-lang/rust/pull/28602
5219 [1.5nl]: https://github.com/rust-lang/rust/pull/28605
5220 [1.5te]: https://github.com/rust-lang/rust/pull/28645
5221 [1.5at]: https://github.com/rust-lang/rust/pull/28650
5222 [1.5am]: https://github.com/rust-lang/rust/pull/28663
5223 [1.5m]: https://github.com/rust-lang/rust/pull/28778
5224 [1.5ict]: https://github.com/rust-lang/rust/pull/28779
5225 [1.5a]: https://github.com/rust-lang/rust/pull/28811
5226 [1.5pi]: https://github.com/rust-lang/rust/pull/28826
5227 [1.5ce]: https://github.com/rust-lang/rfcs/blob/master/text/1229-compile-time-asserts.md
5228 [1.5p]: https://github.com/rust-lang/rfcs/blob/master/text/1238-nonparametric-dropck.md
5229 [1.5i]: https://github.com/rust-lang/rust/pull/28921
5230 [1.5fs]: https://github.com/rust-lang/rust/pull/29021
5231 [1.5f]: https://github.com/rust-lang/rust/pull/29129
5232 [1.5ds]: https://github.com/rust-lang/rust/pull/29148
5233 [1.5s]: https://github.com/rust-lang/rust/pull/29190
5234 [1.5d]: https://github.com/rust-lang/rust/pull/29245
5235 [1.5o]: https://github.com/rust-lang/rust/pull/29259
5236 [1.5nd]: https://github.com/rust-lang/rust/pull/28578
5237 [1.5wf2]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
5238 [1.5wf1]: https://github.com/rust-lang/rust/pull/28669
5239 [dropck]: https://doc.rust-lang.org/nightly/nomicon/dropck.html
5240 [1.5c]: https://github.com/rust-lang/rust/pull/29110
5241 [1.5w]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md
5242 [`cargo install`]: https://github.com/rust-lang/rfcs/blob/master/text/1200-cargo-install.md
5243 [`BinaryHeap::from`]: http://doc.rust-lang.org/nightly/std/convert/trait.From.html#method.from
5244 [`BinaryHeap::into_sorted_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_sorted_vec
5245 [`BinaryHeap::into_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_vec
5246 [`Condvar::wait_timeout`]: http://doc.rust-lang.org/nightly/std/sync/struct.Condvar.html#method.wait_timeout
5247 [`FileTypeExt::is_block_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_block_device
5248 [`FileTypeExt::is_char_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_char_device
5249 [`FileTypeExt::is_fifo`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_fifo
5250 [`FileTypeExt::is_socket`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_socket
5251 [`FileTypeExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html
5252 [`Formatter::alternate`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.alternate
5253 [`Formatter::fill`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.fill
5254 [`Formatter::precision`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.precision
5255 [`Formatter::sign_aware_zero_pad`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_aware_zero_pad
5256 [`Formatter::sign_minus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_minus
5257 [`Formatter::sign_plus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_plus
5258 [`Formatter::width`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.width
5259 [`Iterator::cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.cmp
5260 [`Iterator::eq`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.eq
5261 [`Iterator::ge`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ge
5262 [`Iterator::gt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.gt
5263 [`Iterator::le`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.le
5264 [`Iterator::lt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.lt
5265 [`Iterator::ne`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ne
5266 [`Iterator::partial_cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.partial_cmp
5267 [`Path::canonicalize`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.canonicalize
5268 [`Path::exists`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.exists
5269 [`Path::is_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_dir
5270 [`Path::is_file`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_file
5271 [`Path::metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.metadata
5272 [`Path::read_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_dir
5273 [`Path::read_link`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_link
5274 [`Path::symlink_metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.symlink_metadata
5275 [`Utf8Error::valid_up_to`]: http://doc.rust-lang.org/nightly/core/str/struct.Utf8Error.html#method.valid_up_to
5276 [`Vec::resize`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.resize
5277 [`VecDeque::as_mut_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_mut_slices
5278 [`VecDeque::as_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_slices
5279 [`VecDeque::insert`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.insert
5280 [`VecDeque::shrink_to_fit`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.shrink_to_fit
5281 [`VecDeque::swap_remove_back`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_back
5282 [`VecDeque::swap_remove_front`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_front
5283 [`slice::split_first_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first_mut
5284 [`slice::split_first`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first
5285 [`slice::split_last_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last_mut
5286 [`slice::split_last`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last
5287 [`char::from_u32_unchecked`]: http://doc.rust-lang.org/nightly/std/char/fn.from_u32_unchecked.html
5288 [`fs::canonicalize`]: http://doc.rust-lang.org/nightly/std/fs/fn.canonicalize.html
5289 [`str::MatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.MatchIndices.html
5290 [`str::RMatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.RMatchIndices.html
5291 [`str::match_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.match_indices
5292 [`str::rmatch_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatch_indices
5293 [`str::slice_mut_unchecked`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.slice_mut_unchecked
5294 [`string::ParseError`]: http://doc.rust-lang.org/nightly/std/string/enum.ParseError.html
5296 Version 1.4.0 (2015-10-29)
5297 ==========================
5299 * ~1200 changes, numerous bugfixes
5304 * Windows builds targeting the 64-bit MSVC ABI and linker (instead of
5305 GNU) are now supported and recommended for use.
5310 * [Several changes have been made to fix type soundness and improve
5311 the behavior of associated types][sound]. See [RFC 1214]. Although
5312 we have mostly introduced these changes as warnings this release, to
5313 become errors next release, there are still some scenarios that will
5314 see immediate breakage.
5315 * [The `str::lines` and `BufRead::lines` iterators treat `\r\n` as
5316 line breaks in addition to `\n`][crlf].
5317 * [Loans of `'static` lifetime extend to the end of a function][stat].
5318 * [`str::parse` no longer introduces avoidable rounding error when
5319 parsing floating point numbers. Together with earlier changes to
5320 float formatting/output, "round trips" like f.to_string().parse()
5321 now preserve the value of f exactly. Additionally, leading plus
5322 signs are now accepted][fp3].
5328 * `use` statements that import multiple items [can now rename
5329 them][i], as in `use foo::{bar as kitten, baz as puppy}`.
5330 * [Binops work correctly on fat pointers][binfat].
5331 * `pub extern crate`, which does not behave as expected, [issues a
5332 warning][pec] until a better solution is found.
5337 * [Many APIs were stabilized][stab]: `<Box<str>>::into_string`,
5338 [`Arc::downgrade`], [`Arc::get_mut`], [`Arc::make_mut`],
5339 [`Arc::try_unwrap`], [`Box::from_raw`], [`Box::into_raw`], [`CStr::to_str`],
5340 [`CStr::to_string_lossy`], [`CString::from_raw`], [`CString::into_raw`],
5341 [`IntoRawFd::into_raw_fd`], [`IntoRawFd`],
5342 `IntoRawHandle::into_raw_handle`, `IntoRawHandle`,
5343 `IntoRawSocket::into_raw_socket`, `IntoRawSocket`, [`Rc::downgrade`],
5344 [`Rc::get_mut`], [`Rc::make_mut`], [`Rc::try_unwrap`], [`Result::expect`],
5345 [`String::into_boxed_str`], [`TcpStream::read_timeout`],
5346 [`TcpStream::set_read_timeout`], [`TcpStream::set_write_timeout`],
5347 [`TcpStream::write_timeout`], [`UdpSocket::read_timeout`],
5348 [`UdpSocket::set_read_timeout`], [`UdpSocket::set_write_timeout`],
5349 [`UdpSocket::write_timeout`], `Vec::append`, `Vec::split_off`,
5350 [`VecDeque::append`], [`VecDeque::retain`], [`VecDeque::split_off`],
5351 [`rc::Weak::upgrade`], [`rc::Weak`], [`slice::Iter::as_slice`],
5352 [`slice::IterMut::into_slice`], [`str::CharIndices::as_str`],
5353 [`str::Chars::as_str`], [`str::split_at_mut`], [`str::split_at`],
5354 [`sync::Weak::upgrade`], [`sync::Weak`], [`thread::park_timeout`],
5356 * [Some APIs were deprecated][dep]: `BTreeMap::with_b`,
5357 `BTreeSet::with_b`, `Option::as_mut_slice`, `Option::as_slice`,
5358 `Result::as_mut_slice`, `Result::as_slice`, `f32::from_str_radix`,
5359 `f64::from_str_radix`.
5360 * [Reverse-searching strings is faster with the 'two-way'
5362 * [`std::io::copy` allows `?Sized` arguments][cc].
5363 * The `Windows`, `Chunks`, and `ChunksMut` iterators over slices all
5364 [override `count`, `nth` and `last` with an O(1)
5365 implementation][it].
5366 * [`Default` is implemented for arrays up to `[T; 32]`][d].
5367 * [`IntoRawFd` has been added to the Unix-specific prelude,
5368 `IntoRawSocket` and `IntoRawHandle` to the Windows-specific
5370 * [`Extend<String>` and `FromIterator<String` are both implemented for
5372 * [`IntoIterator` is implemented for references to `Option` and
5374 * [`HashMap` and `HashSet` implement `Extend<&T>` where `T:
5375 Copy`][ext] as part of [RFC 839]. This will cause type inference
5376 breakage in rare situations.
5377 * [`BinaryHeap` implements `Debug`][bh2].
5378 * [`Borrow` and `BorrowMut` are implemented for fixed-size
5380 * [`extern fn`s with the "Rust" and "C" ABIs implement common
5381 traits including `Eq`, `Ord`, `Debug`, `Hash`][fp].
5382 * [String comparison is faster][faststr].
5383 * `&mut T` where `T: std::fmt::Write` [also implements
5384 `std::fmt::Write`][mutw].
5385 * [A stable regression in `VecDeque::push_back` and other
5386 capacity-altering methods that caused panics for zero-sized types
5388 * [Function pointers implement traits for up to 12 parameters][fp2].
5393 * The compiler [no longer uses the 'morestack' feature to prevent
5394 stack overflow][mm]. Instead it uses guard pages and stack
5395 probes (though stack probes are not yet implemented on any platform
5397 * [The compiler matches traits faster when projections are involved][p].
5398 * The 'improper_ctypes' lint [no longer warns about use of `isize` and
5400 * [Cargo now displays useful information about what its doing during
5401 `cargo update`][cu].
5403 [`Arc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.downgrade
5404 [`Arc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.make_mut
5405 [`Arc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.get_mut
5406 [`Arc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.try_unwrap
5407 [`Box::from_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.from_raw
5408 [`Box::into_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.into_raw
5409 [`CStr::to_str`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_str
5410 [`CStr::to_string_lossy`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_string_lossy
5411 [`CString::from_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.from_raw
5412 [`CString::into_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_raw
5413 [`IntoRawFd::into_raw_fd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html#tymethod.into_raw_fd
5414 [`IntoRawFd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html
5415 [`Rc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.downgrade
5416 [`Rc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.get_mut
5417 [`Rc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.make_mut
5418 [`Rc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.try_unwrap
5419 [`Result::expect`]: http://doc.rust-lang.org/nightly/core/result/enum.Result.html#method.expect
5420 [`String::into_boxed_str`]: http://doc.rust-lang.org/nightly/collections/string/struct.String.html#method.into_boxed_str
5421 [`TcpStream::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
5422 [`TcpStream::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
5423 [`TcpStream::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
5424 [`TcpStream::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
5425 [`UdpSocket::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout
5426 [`UdpSocket::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout
5427 [`UdpSocket::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout
5428 [`UdpSocket::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout
5429 [`VecDeque::append`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.append
5430 [`VecDeque::retain`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.retain
5431 [`VecDeque::split_off`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.split_off
5432 [`rc::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html#method.upgrade
5433 [`rc::Weak`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html
5434 [`slice::Iter::as_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.Iter.html#method.as_slice
5435 [`slice::IterMut::into_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.IterMut.html#method.into_slice
5436 [`str::CharIndices::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.CharIndices.html#method.as_str
5437 [`str::Chars::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.Chars.html#method.as_str
5438 [`str::split_at_mut`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at_mut
5439 [`str::split_at`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at
5440 [`sync::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html#method.upgrade
5441 [`sync::Weak`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html
5442 [`thread::park_timeout`]: http://doc.rust-lang.org/nightly/std/thread/fn.park_timeout.html
5443 [`thread::sleep`]: http://doc.rust-lang.org/nightly/std/thread/fn.sleep.html
5444 [bh2]: https://github.com/rust-lang/rust/pull/28156
5445 [binfat]: https://github.com/rust-lang/rust/pull/28270
5446 [bm]: https://github.com/rust-lang/rust/pull/28197
5447 [cc]: https://github.com/rust-lang/rust/pull/27531
5448 [crlf]: https://github.com/rust-lang/rust/pull/28034
5449 [cu]: https://github.com/rust-lang/cargo/pull/1931
5450 [d]: https://github.com/rust-lang/rust/pull/27825
5451 [dep]: https://github.com/rust-lang/rust/pull/28339
5452 [es]: https://github.com/rust-lang/rust/pull/27956
5453 [ext]: https://github.com/rust-lang/rust/pull/28094
5454 [faststr]: https://github.com/rust-lang/rust/pull/28338
5455 [ffi]: https://github.com/rust-lang/rust/pull/28779
5456 [fp]: https://github.com/rust-lang/rust/pull/28268
5457 [fp2]: https://github.com/rust-lang/rust/pull/28560
5458 [fp3]: https://github.com/rust-lang/rust/pull/27307
5459 [i]: https://github.com/rust-lang/rust/pull/27451
5460 [into2]: https://github.com/rust-lang/rust/pull/28039
5461 [it]: https://github.com/rust-lang/rust/pull/27652
5462 [mm]: https://github.com/rust-lang/rust/pull/27338
5463 [mutw]: https://github.com/rust-lang/rust/pull/28368
5464 [sound]: https://github.com/rust-lang/rust/pull/27641
5465 [p]: https://github.com/rust-lang/rust/pull/27866
5466 [pec]: https://github.com/rust-lang/rust/pull/28486
5467 [pr]: https://github.com/rust-lang/rust/pull/27896
5468 [RFC 839]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
5469 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
5470 [s]: https://github.com/rust-lang/rust/pull/27474
5471 [stab]: https://github.com/rust-lang/rust/pull/28339
5472 [stat]: https://github.com/rust-lang/rust/pull/28321
5473 [vd]: https://github.com/rust-lang/rust/pull/28494
5475 Version 1.3.0 (2015-09-17)
5476 ==============================
5478 * ~900 changes, numerous bugfixes
5483 * The [new object lifetime defaults][nold] have been [turned
5484 on][nold2] after a cycle of warnings about the change. Now types
5485 like `&'a Box<Trait>` (or `&'a Rc<Trait>`, etc) will change from
5486 being interpreted as `&'a Box<Trait+'a>` to `&'a
5487 Box<Trait+'static>`.
5488 * [The Rustonomicon][nom] is a new book in the official documentation
5489 that dives into writing unsafe Rust.
5490 * The [`Duration`] API, [has been stabilized][ds]. This basic unit of
5491 timekeeping is employed by other std APIs, as well as out-of-tree
5497 * The [new object lifetime defaults][nold] have been [turned
5498 on][nold2] after a cycle of warnings about the change.
5499 * There is a known [regression][lr] in how object lifetime elision is
5500 interpreted, the proper solution for which is undetermined.
5501 * The `#[prelude_import]` attribute, an internal implementation
5502 detail, was accidentally stabilized previously. [It has been put
5503 behind the `prelude_import` feature gate][pi]. This change is
5504 believed to break no existing code.
5505 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
5506 [more sane for dynamically sized types][dst3]. Code that relied on
5507 the previous behavior is thought to be broken.
5508 * The `dropck` rules, which checks that destructors can't access
5509 destroyed values, [have been updated][dropck] to match the
5510 [RFC][dropckrfc]. This fixes some soundness holes, and as such will
5511 cause some previously-compiling code to no longer build.
5516 * The [new object lifetime defaults][nold] have been [turned
5517 on][nold2] after a cycle of warnings about the change.
5518 * Semicolons may [now follow types and paths in
5519 macros](https://github.com/rust-lang/rust/pull/27000).
5520 * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is
5521 [more sane for dynamically sized types][dst3]. Code that relied on
5522 the previous behavior is not known to exist, and suspected to be
5524 * `'static` variables [may now be recursive][st].
5525 * `ref` bindings choose between [`Deref`] and [`DerefMut`]
5526 implementations correctly.
5527 * The `dropck` rules, which checks that destructors can't access
5528 destroyed values, [have been updated][dropck] to match the
5534 * The [`Duration`] API, [has been stabilized][ds], as well as the
5535 `std::time` module, which presently contains only `Duration`.
5536 * `Box<str>` and `Box<[T]>` both implement `Clone`.
5537 * The owned C string, [`CString`], implements [`Borrow`] and the
5538 borrowed C string, [`CStr`], implements [`ToOwned`]. The two of
5539 these allow C strings to be borrowed and cloned in generic code.
5540 * [`CStr`] implements [`Debug`].
5541 * [`AtomicPtr`] implements [`Debug`].
5542 * [`Error`] trait objects [can be downcast to their concrete types][e]
5543 in many common configurations, using the [`is`], [`downcast`],
5544 [`downcast_ref`] and [`downcast_mut`] methods, similarly to the
5546 * Searching for substrings now [employs the two-way algorithm][search]
5547 instead of doing a naive search. This gives major speedups to a
5548 number of methods, including [`contains`][sc], [`find`][sf],
5549 [`rfind`][srf], [`split`][ss]. [`starts_with`][ssw] and
5550 [`ends_with`][sew] are also faster.
5551 * The performance of `PartialEq` for slices is [much faster][ps].
5552 * The [`Hash`] trait offers the default method, [`hash_slice`], which
5553 is overridden and optimized by the implementations for scalars.
5554 * The [`Hasher`] trait now has a number of specialized `write_*`
5555 methods for primitive types, for efficiency.
5556 * The I/O-specific error type, [`std::io::Error`][ie], gained a set of
5557 methods for accessing the 'inner error', if any: [`get_ref`][iegr],
5558 [`get_mut`][iegm], [`into_inner`][ieii]. As well, the implementation
5559 of [`std::error::Error::cause`][iec] also delegates to the inner
5561 * [`process::Child`][pc] gained the [`id`] method, which returns a
5562 `u32` representing the platform-specific process identifier.
5563 * The [`connect`] method on slices is deprecated, replaced by the new
5564 [`join`] method (note that both of these are on the *unstable*
5565 [`SliceConcatExt`] trait, but through the magic of the prelude are
5566 available to stable code anyway).
5567 * The [`Div`] operator is implemented for [`Wrapping`] types.
5568 * [`DerefMut` is implemented for `String`][dms].
5569 * Performance of SipHash (the default hasher for `HashMap`) is
5570 [better for long data][sh].
5571 * [`AtomicPtr`] implements [`Send`].
5572 * The [`read_to_end`] implementations for [`Stdin`] and [`File`]
5573 are now [specialized to use uninitialized buffers for increased
5575 * Lifetime parameters of foreign functions [are now resolved
5581 * Rust can now, with some coercion, [produce programs that run on
5582 Windows XP][xp], though XP is not considered a supported platform.
5583 * Porting Rust on Windows from the GNU toolchain to MSVC continues
5584 ([1][win1], [2][win2], [3][win3], [4][win4]). It is still not
5585 recommended for use in 1.3, though should be fully-functional
5586 in the [64-bit 1.4 beta][b14].
5587 * On Fedora-based systems installation will [properly configure the
5588 dynamic linker][fl].
5589 * The compiler gained many new extended error descriptions, which can
5590 be accessed with the `--explain` flag.
5591 * The `dropck` pass, which checks that destructors can't access
5592 destroyed values, [has been rewritten][dropck]. This fixes some
5593 soundness holes, and as such will cause some previously-compiling
5594 code to no longer build.
5595 * `rustc` now uses [LLVM to write archive files where possible][ar].
5596 Eventually this will eliminate the compiler's dependency on the ar
5598 * Rust has [preliminary support for i686 FreeBSD][fb] (it has long
5599 supported FreeBSD on x86_64).
5600 * The [`unused_mut`][lum], [`unconditional_recursion`][lur],
5601 [`improper_ctypes`][lic], and [`negate_unsigned`][lnu] lints are
5603 * If landing pads are disabled (with `-Z no-landing-pads`), [`panic!`
5604 will kill the process instead of leaking][nlp].
5606 [`Any`]: http://doc.rust-lang.org/nightly/std/any/trait.Any.html
5607 [`AtomicPtr`]: http://doc.rust-lang.org/nightly/std/sync/atomic/struct.AtomicPtr.html
5608 [`Borrow`]: http://doc.rust-lang.org/nightly/std/borrow/trait.Borrow.html
5609 [`CStr`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html
5610 [`CString`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html
5611 [`Debug`]: http://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
5612 [`DerefMut`]: http://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
5613 [`Deref`]: http://doc.rust-lang.org/nightly/std/ops/trait.Deref.html
5614 [`Div`]: http://doc.rust-lang.org/nightly/std/ops/trait.Div.html
5615 [`Duration`]: http://doc.rust-lang.org/nightly/std/time/struct.Duration.html
5616 [`Error`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html
5617 [`File`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html
5618 [`Hash`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html
5619 [`Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html
5620 [`Send`]: http://doc.rust-lang.org/nightly/std/marker/trait.Send.html
5621 [`SliceConcatExt`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html
5622 [`Stdin`]: http://doc.rust-lang.org/nightly/std/io/struct.Stdin.html
5623 [`ToOwned`]: http://doc.rust-lang.org/nightly/std/borrow/trait.ToOwned.html
5624 [`Wrapping`]: http://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
5625 [`connect`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.connect
5626 [`downcast_mut`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_mut
5627 [`downcast_ref`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_ref
5628 [`downcast`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast
5629 [`hash_slice`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
5630 [`id`]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html#method.id
5631 [`is`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.is
5632 [`join`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.join
5633 [`read_to_end`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_to_end
5634 [ar]: https://github.com/rust-lang/rust/pull/26926
5635 [b14]: https://static.rust-lang.org/dist/rust-beta-x86_64-pc-windows-msvc.msi
5636 [dms]: https://github.com/rust-lang/rust/pull/26241
5637 [dropck]: https://github.com/rust-lang/rust/pull/27261
5638 [dropckrfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
5639 [ds]: https://github.com/rust-lang/rust/pull/26818
5640 [dst1]: http://doc.rust-lang.org/nightly/std/mem/fn.size_of_val.html
5641 [dst2]: http://doc.rust-lang.org/nightly/std/mem/fn.align_of_val.html
5642 [dst3]: https://github.com/rust-lang/rust/pull/27351
5643 [e]: https://github.com/rust-lang/rust/pull/24793
5644 [f]: https://github.com/rust-lang/rust/pull/26588
5645 [fb]: https://github.com/rust-lang/rust/pull/26959
5646 [fl]: https://github.com/rust-lang/rust-installer/pull/41
5647 [hs]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice
5648 [ie]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html
5649 [iec]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.cause
5650 [iegm]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_mut
5651 [iegr]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_ref
5652 [ieii]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.into_inner
5653 [lic]: https://github.com/rust-lang/rust/pull/26583
5654 [lnu]: https://github.com/rust-lang/rust/pull/27026
5655 [lr]: https://github.com/rust-lang/rust/issues/27248
5656 [lum]: https://github.com/rust-lang/rust/pull/26378
5657 [lur]: https://github.com/rust-lang/rust/pull/26783
5658 [nlp]: https://github.com/rust-lang/rust/pull/27176
5659 [nold2]: https://github.com/rust-lang/rust/pull/27045
5660 [nold]: https://github.com/rust-lang/rfcs/blob/master/text/1156-adjust-default-object-bounds.md
5661 [nom]: http://doc.rust-lang.org/nightly/nomicon/
5662 [pc]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html
5663 [pi]: https://github.com/rust-lang/rust/pull/26699
5664 [ps]: https://github.com/rust-lang/rust/pull/26884
5665 [rte]: https://github.com/rust-lang/rust/pull/26950
5666 [sc]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.contains
5667 [search]: https://github.com/rust-lang/rust/pull/26327
5668 [sew]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.ends_with
5669 [sf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.find
5670 [sh]: https://github.com/rust-lang/rust/pull/27280
5671 [srf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rfind
5672 [ss]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split
5673 [ssw]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.starts_with
5674 [st]: https://github.com/rust-lang/rust/pull/26630
5675 [win1]: https://github.com/rust-lang/rust/pull/26569
5676 [win2]: https://github.com/rust-lang/rust/pull/26741
5677 [win3]: https://github.com/rust-lang/rust/pull/26741
5678 [win4]: https://github.com/rust-lang/rust/pull/27210
5679 [xp]: https://github.com/rust-lang/rust/pull/26569
5681 Version 1.2.0 (2015-08-07)
5682 ==========================
5684 * ~1200 changes, numerous bugfixes
5689 * [Dynamically-sized-type coercions][dst] allow smart pointer types
5690 like `Rc` to contain types without a fixed size, arrays and trait
5691 objects, finally enabling use of `Rc<[T]>` and completing the
5692 implementation of DST.
5693 * [Parallel codegen][parcodegen] is now working again, which can
5694 substantially speed up large builds in debug mode; It also gets
5695 another ~33% speedup when bootstrapping on a 4 core machine (using 8
5696 jobs). It's not enabled by default, but will be "in the near
5697 future". It can be activated with the `-C codegen-units=N` flag to
5699 * This is the first release with [experimental support for linking
5700 with the MSVC linker and lib C on Windows (instead of using the GNU
5701 variants via MinGW)][win]. It is yet recommended only for the most
5702 intrepid Rustaceans.
5703 * Benchmark compilations are showing a 30% improvement in
5704 bootstrapping over 1.1.
5709 * The [`to_uppercase`] and [`to_lowercase`] methods on `char` now do
5710 unicode case mapping, which is a previously-planned change in
5711 behavior and considered a bugfix.
5712 * [`mem::align_of`] now specifies [the *minimum alignment* for
5713 T][align], which is usually the alignment programs are interested
5714 in, and the same value reported by clang's
5715 `alignof`. [`mem::min_align_of`] is deprecated. This is not known to
5717 * [The `#[packed]` attribute is no longer silently accepted by the
5718 compiler][packed]. This attribute did nothing and code that
5719 mentioned it likely did not work as intended.
5720 * Associated type defaults are [now behind the
5721 `associated_type_defaults` feature gate][ad]. In 1.1 associated type
5722 defaults *did not work*, but could be mentioned syntactically. As
5723 such this breakage has minimal impact.
5728 * Patterns with `ref mut` now correctly invoke [`DerefMut`] when
5729 matching against dereferenceable values.
5734 * The [`Extend`] trait, which grows a collection from an iterator, is
5735 implemented over iterators of references, for `String`, `Vec`,
5736 `LinkedList`, `VecDeque`, `EnumSet`, `BinaryHeap`, `VecMap`,
5737 `BTreeSet` and `BTreeMap`. [RFC][extend-rfc].
5738 * The [`iter::once`] function returns an iterator that yields a single
5739 element, and [`iter::empty`] returns an iterator that yields no
5741 * The [`matches`] and [`rmatches`] methods on `str` return iterators
5742 over substring matches.
5743 * [`Cell`] and [`RefCell`] both implement `Eq`.
5744 * A number of methods for wrapping arithmetic are added to the
5745 integral types, [`wrapping_div`], [`wrapping_rem`],
5746 [`wrapping_neg`], [`wrapping_shl`], [`wrapping_shr`]. These are in
5747 addition to the existing [`wrapping_add`], [`wrapping_sub`], and
5748 [`wrapping_mul`] methods, and alternatives to the [`Wrapping`]
5749 type.. It is illegal for the default arithmetic operations in Rust
5750 to overflow; the desire to wrap must be explicit.
5751 * The `{:#?}` formatting specifier [displays the alternate,
5752 pretty-printed][debugfmt] form of the `Debug` formatter. This
5753 feature was actually introduced prior to 1.0 with little
5755 * [`fmt::Formatter`] implements [`fmt::Write`], a `fmt`-specific trait
5756 for writing data to formatted strings, similar to [`io::Write`].
5757 * [`fmt::Formatter`] adds 'debug builder' methods, [`debug_struct`],
5758 [`debug_tuple`], [`debug_list`], [`debug_set`], [`debug_map`]. These
5759 are used by code generators to emit implementations of [`Debug`].
5760 * `str` has new [`to_uppercase`][strup] and [`to_lowercase`][strlow]
5761 methods that convert case, following Unicode case mapping.
5762 * It is now easier to handle poisoned locks. The [`PoisonError`]
5763 type, returned by failing lock operations, exposes `into_inner`,
5764 `get_ref`, and `get_mut`, which all give access to the inner lock
5765 guard, and allow the poisoned lock to continue to operate. The
5766 `is_poisoned` method of [`RwLock`] and [`Mutex`] can poll for a
5767 poisoned lock without attempting to take the lock.
5768 * On Unix the [`FromRawFd`] trait is implemented for [`Stdio`], and
5769 [`AsRawFd`] for [`ChildStdin`], [`ChildStdout`], [`ChildStderr`].
5770 On Windows the `FromRawHandle` trait is implemented for `Stdio`,
5771 and `AsRawHandle` for `ChildStdin`, `ChildStdout`,
5773 * [`io::ErrorKind`] has a new variant, `InvalidData`, which indicates
5779 * `rustc` employs smarter heuristics for guessing at [typos].
5780 * `rustc` emits more efficient code for [no-op conversions between
5781 unsafe pointers][nop].
5782 * Fat pointers are now [passed in pairs of immediate arguments][fat],
5783 resulting in faster compile times and smaller code.
5785 [`Extend`]: https://doc.rust-lang.org/nightly/std/iter/trait.Extend.html
5786 [extend-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md
5787 [`iter::once`]: https://doc.rust-lang.org/nightly/std/iter/fn.once.html
5788 [`iter::empty`]: https://doc.rust-lang.org/nightly/std/iter/fn.empty.html
5789 [`matches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.matches
5790 [`rmatches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatches
5791 [`Cell`]: https://doc.rust-lang.org/nightly/std/cell/struct.Cell.html
5792 [`RefCell`]: https://doc.rust-lang.org/nightly/std/cell/struct.RefCell.html
5793 [`wrapping_add`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_add
5794 [`wrapping_sub`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_sub
5795 [`wrapping_mul`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_mul
5796 [`wrapping_div`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_div
5797 [`wrapping_rem`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_rem
5798 [`wrapping_neg`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_neg
5799 [`wrapping_shl`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shl
5800 [`wrapping_shr`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shr
5801 [`Wrapping`]: https://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html
5802 [`fmt::Formatter`]: https://doc.rust-lang.org/nightly/std/fmt/struct.Formatter.html
5803 [`fmt::Write`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Write.html
5804 [`io::Write`]: https://doc.rust-lang.org/nightly/std/io/trait.Write.html
5805 [`debug_struct`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_struct
5806 [`debug_tuple`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_tuple
5807 [`debug_list`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_list
5808 [`debug_set`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_set
5809 [`debug_map`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_map
5810 [`Debug`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html
5811 [strup]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_uppercase
5812 [strlow]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_lowercase
5813 [`to_uppercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_uppercase
5814 [`to_lowercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_lowercase
5815 [`PoisonError`]: https://doc.rust-lang.org/nightly/std/sync/struct.PoisonError.html
5816 [`RwLock`]: https://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html
5817 [`Mutex`]: https://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html
5818 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
5819 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
5820 [`Stdio`]: https://doc.rust-lang.org/nightly/std/process/struct.Stdio.html
5821 [`ChildStdin`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdin.html
5822 [`ChildStdout`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdout.html
5823 [`ChildStderr`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStderr.html
5824 [`io::ErrorKind`]: https://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html
5825 [debugfmt]: https://www.reddit.com/r/rust/comments/3ceaui/psa_produces_prettyprinted_debug_output/
5826 [`DerefMut`]: https://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html
5827 [`mem::align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.align_of.html
5828 [align]: https://github.com/rust-lang/rust/pull/25646
5829 [`mem::min_align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.min_align_of.html
5830 [typos]: https://github.com/rust-lang/rust/pull/26087
5831 [nop]: https://github.com/rust-lang/rust/pull/26336
5832 [fat]: https://github.com/rust-lang/rust/pull/26411
5833 [dst]: https://github.com/rust-lang/rfcs/blob/master/text/0982-dst-coercion.md
5834 [parcodegen]: https://github.com/rust-lang/rust/pull/26018
5835 [packed]: https://github.com/rust-lang/rust/pull/25541
5836 [ad]: https://github.com/rust-lang/rust/pull/27382
5837 [win]: https://github.com/rust-lang/rust/pull/25350
5839 Version 1.1.0 (2015-06-25)
5840 =========================
5842 * ~850 changes, numerous bugfixes
5847 * The [`std::fs` module has been expanded][fs] to expand the set of
5848 functionality exposed:
5849 * `DirEntry` now supports optimizations like `file_type` and `metadata` which
5850 don't incur a syscall on some platforms.
5851 * A `symlink_metadata` function has been added.
5852 * The `fs::Metadata` structure now lowers to its OS counterpart, providing
5853 access to all underlying information.
5854 * The compiler now contains extended explanations of many errors. When an error
5855 with an explanation occurs the compiler suggests using the `--explain` flag
5856 to read the explanation. Error explanations are also [available online][err-index].
5857 * Thanks to multiple [improvements][sk] to [type checking][pre], as
5858 well as other work, the time to bootstrap the compiler decreased by
5864 * The [`str::split_whitespace`] method splits a string on unicode
5865 whitespace boundaries.
5866 * On both Windows and Unix, new extension traits provide conversion of
5867 I/O types to and from the underlying system handles. On Unix, these
5868 traits are [`FromRawFd`] and [`AsRawFd`], on Windows `FromRawHandle`
5869 and `AsRawHandle`. These are implemented for `File`, `TcpStream`,
5870 `TcpListener`, and `UpdSocket`. Further implementations for
5871 `std::process` will be stabilized later.
5872 * On Unix, [`std::os::unix::symlink`] creates symlinks. On
5873 Windows, symlinks can be created with
5874 `std::os::windows::symlink_dir` and
5875 `std::os::windows::symlink_file`.
5876 * The `mpsc::Receiver` type can now be converted into an iterator with
5877 `into_iter` on the [`IntoIterator`] trait.
5878 * `Ipv4Addr` can be created from `u32` with the `From<u32>`
5879 implementation of the [`From`] trait.
5880 * The `Debug` implementation for `RangeFull` [creates output that is
5881 more consistent with other implementations][rf].
5882 * [`Debug` is implemented for `File`][file].
5883 * The `Default` implementation for `Arc` [no longer requires `Sync +
5885 * [The `Iterator` methods `count`, `nth`, and `last` have been
5886 overridden for slices to have O(1) performance instead of O(n)][si].
5887 * Incorrect handling of paths on Windows has been improved in both the
5888 compiler and the standard library.
5889 * [`AtomicPtr` gained a `Default` implementation][ap].
5890 * In accordance with Rust's policy on arithmetic overflow `abs` now
5891 [panics on overflow when debug assertions are enabled][abs].
5892 * The [`Cloned`] iterator, which was accidentally left unstable for
5893 1.0 [has been stabilized][c].
5894 * The [`Incoming`] iterator, which iterates over incoming TCP
5895 connections, and which was accidentally unnamable in 1.0, [is now
5896 properly exported][inc].
5897 * [`BinaryHeap`] no longer corrupts itself [when functions called by
5898 `sift_up` or `sift_down` panic][bh].
5899 * The [`split_off`] method of `LinkedList` [no longer corrupts
5900 the list in certain scenarios][ll].
5905 * Type checking performance [has improved notably][sk] with
5906 [multiple improvements][pre].
5907 * The compiler [suggests code changes][ch] for more errors.
5908 * rustc and it's build system have experimental support for [building
5909 toolchains against MUSL][m] instead of glibc on Linux.
5910 * The compiler defines the `target_env` cfg value, which is used for
5911 distinguishing toolchains that are otherwise for the same
5912 platform. Presently this is set to `gnu` for common GNU Linux
5913 targets and for MinGW targets, and `musl` for MUSL Linux targets.
5914 * The [`cargo rustc`][crc] command invokes a build with custom flags
5916 * [Android executables are always position independent][pie].
5917 * [The `drop_with_repr_extern` lint warns about mixing `repr(C)`
5920 [`str::split_whitespace`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_whitespace
5921 [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html
5922 [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html
5923 [`std::os::unix::symlink`]: https://doc.rust-lang.org/nightly/std/os/unix/fs/fn.symlink.html
5924 [`IntoIterator`]: https://doc.rust-lang.org/nightly/std/iter/trait.IntoIterator.html
5925 [`From`]: https://doc.rust-lang.org/nightly/std/convert/trait.From.html
5926 [rf]: https://github.com/rust-lang/rust/pull/24491
5927 [err-index]: https://doc.rust-lang.org/error-index.html
5928 [sk]: https://github.com/rust-lang/rust/pull/24615
5929 [pre]: https://github.com/rust-lang/rust/pull/25323
5930 [file]: https://github.com/rust-lang/rust/pull/24598
5931 [ch]: https://github.com/rust-lang/rust/pull/24683
5932 [arc]: https://github.com/rust-lang/rust/pull/24695
5933 [si]: https://github.com/rust-lang/rust/pull/24701
5934 [ap]: https://github.com/rust-lang/rust/pull/24834
5935 [m]: https://github.com/rust-lang/rust/pull/24777
5936 [fs]: https://github.com/rust-lang/rfcs/blob/master/text/1044-io-fs-2.1.md
5937 [crc]: https://github.com/rust-lang/cargo/pull/1568
5938 [pie]: https://github.com/rust-lang/rust/pull/24953
5939 [abs]: https://github.com/rust-lang/rust/pull/25441
5940 [c]: https://github.com/rust-lang/rust/pull/25496
5941 [`Cloned`]: https://doc.rust-lang.org/nightly/std/iter/struct.Cloned.html
5942 [`Incoming`]: https://doc.rust-lang.org/nightly/std/net/struct.Incoming.html
5943 [inc]: https://github.com/rust-lang/rust/pull/25522
5944 [bh]: https://github.com/rust-lang/rust/pull/25856
5945 [`BinaryHeap`]: https://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html
5946 [ll]: https://github.com/rust-lang/rust/pull/26022
5947 [`split_off`]: https://doc.rust-lang.org/nightly/collections/linked_list/struct.LinkedList.html#method.split_off
5948 [drop]: https://github.com/rust-lang/rust/pull/24935
5950 Version 1.0.0 (2015-05-15)
5951 ========================
5953 * ~1500 changes, numerous bugfixes
5958 * The vast majority of the standard library is now `#[stable]`. It is
5959 no longer possible to use unstable features with a stable build of
5961 * Many popular crates on [crates.io] now work on the stable release
5963 * Arithmetic on basic integer types now [checks for overflow in debug
5969 * Several [restrictions have been added to trait coherence][coh] in
5970 order to make it easier for upstream authors to change traits
5971 without breaking downstream code.
5972 * Digits of binary and octal literals are [lexed more eagerly][lex] to
5973 improve error messages and macro behavior. For example, `0b1234` is
5974 now lexed as `0b1234` instead of two tokens, `0b1` and `234`.
5975 * Trait bounds [are always invariant][inv], eliminating the need for
5976 the `PhantomFn` and `MarkerTrait` lang items, which have been
5978 * ["-" is no longer a valid character in crate names][cr], the `extern crate
5979 "foo" as bar` syntax has been replaced with `extern crate foo as
5980 bar`, and Cargo now automatically translates "-" in *package* names
5981 to underscore for the crate name.
5982 * [Lifetime shadowing is an error][lt].
5983 * [`Send` no longer implies `'static`][send-rfc].
5984 * [UFCS now supports trait-less associated paths][moar-ufcs] like
5985 `MyType::default()`.
5986 * Primitive types [now have inherent methods][prim-inherent],
5987 obviating the need for extension traits like `SliceExt`.
5988 * Methods with `Self: Sized` in their `where` clause are [considered
5989 object-safe][self-sized], allowing many extension traits like
5990 `IteratorExt` to be merged into the traits they extended.
5991 * You can now [refer to associated types][assoc-where] whose
5992 corresponding trait bounds appear only in a `where` clause.
5993 * The final bits of [OIBIT landed][oibit-final], meaning that traits
5994 like `Send` and `Sync` are now library-defined.
5995 * A [Reflect trait][reflect] was introduced, which means that
5996 downcasting via the `Any` trait is effectively limited to concrete
5997 types. This helps retain the potentially-important "parametricity"
5998 property: generic code cannot behave differently for different type
5999 arguments except in minor ways.
6000 * The `unsafe_destructor` feature is now deprecated in favor of the
6001 [new `dropck`][dropck]. This change is a major reduction in unsafe
6007 * The `thread_local` module [has been renamed to `std::thread`][th].
6008 * The methods of `IteratorExt` [have been moved to the `Iterator`
6010 * Several traits that implement Rust's conventions for type
6011 conversions, `AsMut`, `AsRef`, `From`, and `Into` have been
6012 [centralized in the `std::convert` module][con].
6013 * The `FromError` trait [was removed in favor of `From`][fe].
6014 * The basic sleep function [has moved to
6015 `std::thread::sleep_ms`][slp].
6016 * The `splitn` function now takes an `n` parameter that represents the
6017 number of items yielded by the returned iterator [instead of the
6018 number of 'splits'][spl].
6019 * [On Unix, all file descriptors are `CLOEXEC` by default][clo].
6020 * [Derived implementations of `PartialOrd` now order enums according
6021 to their explicitly-assigned discriminants][po].
6022 * [Methods for searching strings are generic over `Pattern`s][pat],
6023 implemented presently by `&char`, `&str`, `FnMut(char) -> bool` and
6025 * [In method resolution, object methods are resolved before inherent
6027 * [`String::from_str` has been deprecated in favor of the `From` impl,
6028 `String::from`][sf].
6029 * [`io::Error` implements `Sync`][ios].
6030 * [The `words` method on `&str` has been replaced with
6031 `split_whitespace`][sw], to avoid answering the tricky question, 'what is
6033 * The new path and IO modules are complete and `#[stable]`. This
6034 was the major library focus for this cycle.
6035 * The path API was [revised][path-normalize] to normalize `.`,
6036 adjusting the tradeoffs in favor of the most common usage.
6037 * A large number of remaining APIs in `std` were also stabilized
6038 during this cycle; about 75% of the non-deprecated API surface
6040 * The new [string pattern API][string-pattern] landed, which makes
6041 the string slice API much more internally consistent and flexible.
6042 * A new set of [generic conversion traits][conversion] replaced
6043 many existing ad hoc traits.
6044 * Generic numeric traits were [completely removed][num-traits]. This
6045 was made possible thanks to inherent methods for primitive types,
6046 and the removal gives maximal flexibility for designing a numeric
6047 hierarchy in the future.
6048 * The `Fn` traits are now related via [inheritance][fn-inherit]
6049 and provide ergonomic [blanket implementations][fn-blanket].
6050 * The `Index` and `IndexMut` traits were changed to
6051 [take the index by value][index-value], enabling code like
6052 `hash_map["string"]` to work.
6053 * `Copy` now [inherits][copy-clone] from `Clone`, meaning that all
6054 `Copy` data is known to be `Clone` as well.
6059 * Many errors now have extended explanations that can be accessed with
6060 the `--explain` flag to `rustc`.
6061 * Many new examples have been added to the standard library
6063 * rustdoc has received a number of improvements focused on completion
6065 * Metadata was tuned, shrinking binaries [by 27%][metadata-shrink].
6066 * Much headway was made on ecosystem-wide CI, making it possible
6067 to [compare builds for breakage][ci-compare].
6070 [crates.io]: http://crates.io
6071 [clo]: https://github.com/rust-lang/rust/pull/24034
6072 [coh]: https://github.com/rust-lang/rfcs/blob/master/text/1023-rebalancing-coherence.md
6073 [con]: https://github.com/rust-lang/rust/pull/23875
6074 [cr]: https://github.com/rust-lang/rust/pull/23419
6075 [fe]: https://github.com/rust-lang/rust/pull/23879
6076 [ie]: https://github.com/rust-lang/rust/pull/23300
6077 [inv]: https://github.com/rust-lang/rust/pull/23938
6078 [ios]: https://github.com/rust-lang/rust/pull/24133
6079 [lex]: https://github.com/rust-lang/rfcs/blob/master/text/0879-small-base-lexing.md
6080 [lt]: https://github.com/rust-lang/rust/pull/24057
6081 [meth]: https://github.com/rust-lang/rust/pull/24056
6082 [pat]: https://github.com/rust-lang/rfcs/blob/master/text/0528-string-patterns.md
6083 [po]: https://github.com/rust-lang/rust/pull/24270
6084 [sf]: https://github.com/rust-lang/rust/pull/24517
6085 [slp]: https://github.com/rust-lang/rust/pull/23949
6086 [spl]: https://github.com/rust-lang/rfcs/blob/master/text/0979-align-splitn-with-other-languages.md
6087 [sw]: https://github.com/rust-lang/rfcs/blob/master/text/1054-str-words.md
6088 [th]: https://github.com/rust-lang/rfcs/blob/master/text/0909-move-thread-local-to-std-thread.md
6089 [send-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0458-send-improvements.md
6090 [moar-ufcs]: https://github.com/rust-lang/rust/pull/22172
6091 [prim-inherent]: https://github.com/rust-lang/rust/pull/23104
6092 [overflow]: https://github.com/rust-lang/rfcs/blob/master/text/0560-integer-overflow.md
6093 [metadata-shrink]: https://github.com/rust-lang/rust/pull/22971
6094 [self-sized]: https://github.com/rust-lang/rust/pull/22301
6095 [assoc-where]: https://github.com/rust-lang/rust/pull/22512
6096 [string-pattern]: https://github.com/rust-lang/rust/pull/22466
6097 [oibit-final]: https://github.com/rust-lang/rust/pull/21689
6098 [reflect]: https://github.com/rust-lang/rust/pull/23712
6099 [conversion]: https://github.com/rust-lang/rfcs/pull/529
6100 [num-traits]: https://github.com/rust-lang/rust/pull/23549
6101 [index-value]: https://github.com/rust-lang/rust/pull/23601
6102 [dropck]: https://github.com/rust-lang/rfcs/pull/769
6103 [ci-compare]: https://gist.github.com/brson/a30a77836fbec057cbee
6104 [fn-inherit]: https://github.com/rust-lang/rust/pull/23282
6105 [fn-blanket]: https://github.com/rust-lang/rust/pull/23895
6106 [copy-clone]: https://github.com/rust-lang/rust/pull/23860
6107 [path-normalize]: https://github.com/rust-lang/rust/pull/23229
6110 Version 1.0.0-alpha.2 (2015-02-20)
6111 =====================================
6113 * ~1300 changes, numerous bugfixes
6117 * The various I/O modules were [overhauled][io-rfc] to reduce
6118 unnecessary abstractions and provide better interoperation with
6119 the underlying platform. The old `io` module remains temporarily
6121 * The standard library now [participates in feature gating][feat],
6122 so use of unstable libraries now requires a `#![feature(...)]`
6123 attribute. The impact of this change is [described on the
6124 forum][feat-forum]. [RFC][feat-rfc].
6128 * `for` loops [now operate on the `IntoIterator` trait][into],
6129 which eliminates the need to call `.iter()`, etc. to iterate
6130 over collections. There are some new subtleties to remember
6131 though regarding what sort of iterators various types yield, in
6132 particular that `for foo in bar { }` yields values from a move
6133 iterator, destroying the original collection. [RFC][into-rfc].
6134 * Objects now have [default lifetime bounds][obj], so you don't
6135 have to write `Box<Trait+'static>` when you don't care about
6136 storing references. [RFC][obj-rfc].
6137 * In types that implement `Drop`, [lifetimes must outlive the
6138 value][drop]. This will soon make it possible to safely
6139 implement `Drop` for types where `#[unsafe_destructor]` is now
6140 required. Read the [gorgeous RFC][drop-rfc] for details.
6141 * The fully qualified <T as Trait>::X syntax lets you set the Self
6142 type for a trait method or associated type. [RFC][ufcs-rfc].
6143 * References to types that implement `Deref<U>` now [automatically
6144 coerce to references][deref] to the dereferenced type `U`,
6145 e.g. `&T where T: Deref<U>` automatically coerces to `&U`. This
6146 should eliminate many unsightly uses of `&*`, as when converting
6147 from references to vectors into references to
6148 slices. [RFC][deref-rfc].
6149 * The explicit [closure kind syntax][close] (`|&:|`, `|&mut:|`,
6150 `|:|`) is obsolete and closure kind is inferred from context.
6151 * [`Self` is a keyword][Self].
6155 * The `Show` and `String` formatting traits [have been
6156 renamed][fmt] to `Debug` and `Display` to more clearly reflect
6157 their related purposes. Automatically getting a string
6158 conversion to use with `format!("{:?}", something_to_debug)` is
6159 now written `#[derive(Debug)]`.
6160 * Abstract [OS-specific string types][osstr], `std::ff::{OsString,
6161 OsStr}`, provide strings in platform-specific encodings for easier
6162 interop with system APIs. [RFC][osstr-rfc].
6163 * The `boxed::into_raw` and `Box::from_raw` functions [convert
6164 between `Box<T>` and `*mut T`][boxraw], a common pattern for
6165 creating raw pointers.
6169 * Certain long error messages of the form 'expected foo found bar'
6170 are now [split neatly across multiple
6171 lines][multiline]. Examples in the PR.
6172 * On Unix Rust can be [uninstalled][un] by running
6173 `/usr/local/lib/rustlib/uninstall.sh`.
6174 * The `#[rustc_on_unimplemented]` attribute, requiring the
6175 'on_unimplemented' feature, lets rustc [display custom error
6176 messages when a trait is expected to be implemented for a type
6181 * Rust is tested against a [LALR grammar][lalr], which parses
6182 almost all the Rust files that rustc does.
6184 [boxraw]: https://github.com/rust-lang/rust/pull/21318
6185 [close]: https://github.com/rust-lang/rust/pull/21843
6186 [deref]: https://github.com/rust-lang/rust/pull/21351
6187 [deref-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0241-deref-conversions.md
6188 [drop]: https://github.com/rust-lang/rust/pull/21972
6189 [drop-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md
6190 [feat]: https://github.com/rust-lang/rust/pull/21248
6191 [feat-forum]: https://users.rust-lang.org/t/psa-important-info-about-rustcs-new-feature-staging/82/5
6192 [feat-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0507-release-channels.md
6193 [fmt]: https://github.com/rust-lang/rust/pull/21457
6194 [into]: https://github.com/rust-lang/rust/pull/20790
6195 [into-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md#intoiterator-and-iterable
6196 [io-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
6197 [lalr]: https://github.com/rust-lang/rust/pull/21452
6198 [multiline]: https://github.com/rust-lang/rust/pull/19870
6199 [obj]: https://github.com/rust-lang/rust/pull/22230
6200 [obj-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0599-default-object-bound.md
6201 [onun]: https://github.com/rust-lang/rust/pull/20889
6202 [osstr]: https://github.com/rust-lang/rust/pull/21488
6203 [osstr-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
6204 [Self]: https://github.com/rust-lang/rust/pull/22158
6205 [ufcs-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0132-ufcs.md
6206 [un]: https://github.com/rust-lang/rust/pull/22256
6209 Version 1.0.0-alpha (2015-01-09)
6210 ==================================
6212 * ~2400 changes, numerous bugfixes
6216 * The language itself is considered feature complete for 1.0,
6217 though there will be many usability improvements and bugfixes
6218 before the final release.
6219 * Nearly 50% of the public API surface of the standard library has
6220 been declared 'stable'. Those interfaces are unlikely to change
6222 * The long-running debate over integer types has been
6223 [settled][ints]: Rust will ship with types named `isize` and
6224 `usize`, rather than `int` and `uint`, for pointer-sized
6225 integers. Guidelines will be rolled out during the alpha cycle.
6226 * Most crates that are not `std` have been moved out of the Rust
6227 distribution into the Cargo ecosystem so they can evolve
6228 separately and don't need to be stabilized as quickly, including
6229 'time', 'getopts', 'num', 'regex', and 'term'.
6230 * Documentation continues to be expanded with more API coverage, more
6231 examples, and more in-depth explanations. The guides have been
6232 consolidated into [The Rust Programming Language][trpl].
6233 * "[Rust By Example][rbe]" is now maintained by the Rust team.
6234 * All official Rust binary installers now come with [Cargo], the
6235 Rust package manager.
6239 * Closures have been [completely redesigned][unboxed] to be
6240 implemented in terms of traits, can now be used as generic type
6241 bounds and thus monomorphized and inlined, or via an opaque
6242 pointer (boxed) as in the old system. The new system is often
6243 referred to as 'unboxed' closures.
6244 * Traits now support [associated types][assoc], allowing families
6245 of related types to be defined together and used generically in
6247 * Enum variants are [namespaced by their type names][enum].
6248 * [`where` clauses][where] provide a more versatile and attractive
6249 syntax for specifying generic bounds, though the previous syntax
6251 * Rust again picks a [fallback][fb] (either i32 or f64) for uninferred
6253 * Rust [no longer has a runtime][rt] of any description, and only
6254 supports OS threads, not green threads.
6255 * At long last, Rust has been overhauled for 'dynamically-sized
6256 types' ([DST]), which integrates 'fat pointers' (object types,
6257 arrays, and `str`) more deeply into the type system, making it
6259 * Rust now has a general [range syntax][range], `i..j`, `i..`, and
6260 `..j` that produce range types and which, when combined with the
6261 `Index` operator and multidispatch, leads to a convenient slice
6263 * The new range syntax revealed an ambiguity in the fixed-length
6264 array syntax, so now fixed length arrays [are written `[T;
6266 * The `Copy` trait is no longer implemented automatically. Unsafe
6267 pointers no longer implement `Sync` and `Send` so types
6268 containing them don't automatically either. `Sync` and `Send`
6269 are now 'unsafe traits' so one can "forcibly" implement them via
6270 `unsafe impl` if a type confirms to the requirements for them
6271 even though the internals do not (e.g. structs containing unsafe
6272 pointers like `Arc`). These changes are intended to prevent some
6273 footguns and are collectively known as [opt-in built-in
6274 traits][oibit] (though `Sync` and `Send` will soon become pure
6275 library types unknown to the compiler).
6276 * Operator traits now take their operands [by value][ops], and
6277 comparison traits can use multidispatch to compare one type
6278 against multiple other types, allowing e.g. `String` to be
6279 compared with `&str`.
6280 * `if let` and `while let` are no longer feature-gated.
6281 * Rust has adopted a more [uniform syntax for escaping unicode
6282 characters][unicode].
6283 * `macro_rules!` [has been declared stable][mac]. Though it is a
6284 flawed system it is sufficiently popular that it must be usable
6285 for 1.0. Effort has gone into [future-proofing][mac-future] it
6286 in ways that will allow other macro systems to be developed in
6287 parallel, and won't otherwise impact the evolution of the
6289 * The prelude has been [pared back significantly][prelude] such
6290 that it is the minimum necessary to support the most pervasive
6291 code patterns, and through [generalized where clauses][where]
6292 many of the prelude extension traits have been consolidated.
6293 * Rust's rudimentary reflection [has been removed][refl], as it
6294 incurred too much code generation for little benefit.
6295 * [Struct variants][structvars] are no longer feature-gated.
6296 * Trait bounds can be [polymorphic over lifetimes][hrtb]. Also
6297 known as 'higher-ranked trait bounds', this crucially allows
6298 unboxed closures to work.
6299 * Macros invocations surrounded by parens or square brackets and
6300 not terminated by a semicolon are [parsed as
6301 expressions][macros], which makes expressions like `vec![1i32,
6302 2, 3].len()` work as expected.
6303 * Trait objects now implement their traits automatically, and
6304 traits that can be coerced to objects now must be [object
6306 * Automatically deriving traits is now done with `#[derive(...)]`
6307 not `#[deriving(...)]` for [consistency with other naming
6308 conventions][derive].
6309 * Importing the containing module or enum at the same time as
6310 items or variants they contain is [now done with `self` instead
6311 of `mod`][self], as in use `foo::{self, bar}`
6312 * Glob imports are no longer feature-gated.
6313 * The `box` operator and `box` patterns have been feature-gated
6314 pending a redesign. For now unique boxes should be allocated
6315 like other containers, with `Box::new`.
6319 * A [series][coll1] of [efforts][coll2] to establish
6320 [conventions][coll3] for collections types has resulted in API
6321 improvements throughout the standard library.
6322 * New [APIs for error handling][err] provide ergonomic interop
6323 between error types, and [new conventions][err-conv] describe
6324 more clearly the recommended error handling strategies in Rust.
6325 * The `fail!` macro has been renamed to [`panic!`][panic] so that
6326 it is easier to discuss failure in the context of error handling
6327 without making clarifications as to whether you are referring to
6328 the 'fail' macro or failure more generally.
6329 * On Linux, `OsRng` prefers the new, more reliable `getrandom`
6330 syscall when available.
6331 * The 'serialize' crate has been renamed 'rustc-serialize' and
6332 moved out of the distribution to Cargo. Although it is widely
6333 used now, it is expected to be superseded in the near future.
6334 * The `Show` formatter, typically implemented with
6335 `#[derive(Show)]` is [now requested with the `{:?}`
6336 specifier][show] and is intended for use by all types, for uses
6337 such as `println!` debugging. The new `String` formatter must be
6338 implemented by hand, uses the `{}` specifier, and is intended
6339 for full-fidelity conversions of things that can logically be
6340 represented as strings.
6344 * [Flexible target specification][flex] allows rustc's code
6345 generation to be configured to support otherwise-unsupported
6347 * Rust comes with rust-gdb and rust-lldb scripts that launch their
6348 respective debuggers with Rust-appropriate pretty-printing.
6349 * The Windows installation of Rust is distributed with the
6350 MinGW components currently required to link binaries on that
6355 * Nullable enum optimizations have been extended to more types so
6356 that e.g. `Option<Vec<T>>` and `Option<String>` take up no more
6357 space than the inner types themselves.
6358 * Work has begun on supporting AArch64.
6360 [Cargo]: https://crates.io
6361 [unboxed]: http://smallcultfollowing.com/babysteps/blog/2014/11/26/purging-proc/
6362 [enum]: https://github.com/rust-lang/rfcs/blob/master/text/0390-enum-namespacing.md
6363 [flex]: https://github.com/rust-lang/rfcs/blob/master/text/0131-target-specification.md
6364 [err]: https://github.com/rust-lang/rfcs/blob/master/text/0201-error-chaining.md
6365 [err-conv]: https://github.com/rust-lang/rfcs/blob/master/text/0236-error-conventions.md
6366 [rt]: https://github.com/rust-lang/rfcs/blob/master/text/0230-remove-runtime.md
6367 [mac]: https://github.com/rust-lang/rfcs/blob/master/text/0453-macro-reform.md
6368 [mac-future]: https://github.com/rust-lang/rfcs/pull/550
6369 [DST]: http://smallcultfollowing.com/babysteps/blog/2014/01/05/dst-take-5/
6370 [coll1]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md
6371 [coll2]: https://github.com/rust-lang/rfcs/blob/master/text/0509-collections-reform-part-2.md
6372 [coll3]: https://github.com/rust-lang/rfcs/blob/master/text/0216-collection-views.md
6373 [ops]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md
6374 [prelude]: https://github.com/rust-lang/rfcs/blob/master/text/0503-prelude-stabilization.md
6375 [where]: https://github.com/rust-lang/rfcs/blob/master/text/0135-where.md
6376 [refl]: https://github.com/rust-lang/rfcs/blob/master/text/0379-remove-reflection.md
6377 [panic]: https://github.com/rust-lang/rfcs/blob/master/text/0221-panic.md
6378 [structvars]: https://github.com/rust-lang/rfcs/blob/master/text/0418-struct-variants.md
6379 [hrtb]: https://github.com/rust-lang/rfcs/blob/master/text/0387-higher-ranked-trait-bounds.md
6380 [unicode]: https://github.com/rust-lang/rfcs/blob/master/text/0446-es6-unicode-escapes.md
6381 [oibit]: https://github.com/rust-lang/rfcs/blob/master/text/0019-opt-in-builtin-traits.md
6382 [macros]: https://github.com/rust-lang/rfcs/blob/master/text/0378-expr-macros.md
6383 [range]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md#indexing-and-slicing
6384 [arrays]: https://github.com/rust-lang/rfcs/blob/master/text/0520-new-array-repeat-syntax.md
6385 [show]: https://github.com/rust-lang/rfcs/blob/master/text/0504-show-stabilization.md
6386 [derive]: https://github.com/rust-lang/rfcs/blob/master/text/0534-deriving2derive.md
6387 [self]: https://github.com/rust-lang/rfcs/blob/master/text/0532-self-in-use.md
6388 [fb]: https://github.com/rust-lang/rfcs/blob/master/text/0212-restore-int-fallback.md
6389 [objsafe]: https://github.com/rust-lang/rfcs/blob/master/text/0255-object-safety.md
6390 [assoc]: https://github.com/rust-lang/rfcs/blob/master/text/0195-associated-items.md
6391 [ints]: https://github.com/rust-lang/rfcs/pull/544#issuecomment-68760871
6392 [trpl]: https://doc.rust-lang.org/book/index.html
6393 [rbe]: http://rustbyexample.com/
6396 Version 0.12.0 (2014-10-09)
6397 =============================
6399 * ~1900 changes, numerous bugfixes
6403 * The introductory documentation (now called The Rust Guide) has
6404 been completely rewritten, as have a number of supplementary
6406 * Rust's package manager, Cargo, continues to improve and is
6407 sometimes considered to be quite awesome.
6408 * Many API's in `std` have been reviewed and updated for
6409 consistency with the in-development Rust coding
6410 guidelines. The standard library documentation tracks
6411 stabilization progress.
6412 * Minor libraries have been moved out-of-tree to the rust-lang org
6413 on GitHub: uuid, semver, glob, num, hexfloat, fourcc. They can
6414 be installed with Cargo.
6415 * Lifetime elision allows lifetime annotations to be left off of
6416 function declarations in many common scenarios.
6417 * Rust now works on 64-bit Windows.
6420 * Indexing can be overloaded with the `Index` and `IndexMut`
6422 * The `if let` construct takes a branch only if the `let` pattern
6423 matches, currently behind the 'if_let' feature gate.
6424 * 'where clauses', a more flexible syntax for specifying trait
6425 bounds that is more aesthetic, have been added for traits and
6426 free functions. Where clauses will in the future make it
6427 possible to constrain associated types, which would be
6428 impossible with the existing syntax.
6429 * A new slicing syntax (e.g. `[0..4]`) has been introduced behind
6430 the 'slicing_syntax' feature gate, and can be overloaded with
6431 the `Slice` or `SliceMut` traits.
6432 * The syntax for matching of sub-slices has been changed to use a
6433 postfix `..` instead of prefix (.e.g. `[a, b, c..]`), for
6434 consistency with other uses of `..` and to future-proof
6435 potential additional uses of the syntax.
6436 * The syntax for matching inclusive ranges in patterns has changed
6437 from `0..3` to `0...4` to be consistent with the exclusive range
6439 * Matching of sub-slices in non-tail positions (e.g. `[a.., b,
6440 c]`) has been put behind the 'advanced_slice_patterns' feature
6441 gate and may be removed in the future.
6442 * Components of tuples and tuple structs can be extracted using
6443 the `value.0` syntax, currently behind the `tuple_indexing`
6445 * The `#[crate_id]` attribute is no longer supported; versioning
6446 is handled by the package manager.
6447 * Renaming crate imports are now written `extern crate foo as bar`
6448 instead of `extern crate bar = foo`.
6449 * Renaming use statements are now written `use foo as bar` instead
6451 * `let` and `match` bindings and argument names in macros are now
6453 * The new, more efficient, closure types ('unboxed closures') have
6454 been added under a feature gate, 'unboxed_closures'. These will
6455 soon replace the existing closure types, once higher-ranked
6456 trait lifetimes are added to the language.
6457 * `move` has been added as a keyword, for indicating closures
6458 that capture by value.
6459 * Mutation and assignment is no longer allowed in pattern guards.
6460 * Generic structs and enums can now have trait bounds.
6461 * The `Share` trait is now called `Sync` to free up the term
6462 'shared' to refer to 'shared reference' (the default reference
6464 * Dynamically-sized types have been mostly implemented,
6465 unifying the behavior of fat-pointer types with the rest of the
6467 * As part of dynamically-sized types, the `Sized` trait has been
6468 introduced, which qualifying types implement by default, and
6469 which type parameters expect by default. To specify that a type
6470 parameter does not need to be sized, write `<Sized? T>`. Most
6471 types are `Sized`, notable exceptions being unsized arrays
6472 (`[T]`) and trait types.
6473 * Closures can return `!`, as in `|| -> !` or `proc() -> !`.
6474 * Lifetime bounds can now be applied to type parameters and object
6476 * The old, reference counted GC type, `Gc<T>` which was once
6477 denoted by the `@` sigil, has finally been removed. GC will be
6478 revisited in the future.
6481 * Library documentation has been improved for a number of modules.
6482 * Bit-vectors, collections::bitv has been modernized.
6483 * The url crate is deprecated in favor of
6484 http://github.com/servo/rust-url, which can be installed with
6486 * Most I/O stream types can be cloned and subsequently closed from
6488 * A `std::time::Duration` type has been added for use in I/O
6489 methods that rely on timers, as well as in the 'time' crate's
6490 `Timespec` arithmetic.
6491 * The runtime I/O abstraction layer that enabled the green thread
6492 scheduler to do non-thread-blocking I/O has been removed, along
6493 with the libuv-based implementation employed by the green thread
6494 scheduler. This will greatly simplify the future I/O work.
6495 * `collections::btree` has been rewritten to have a more
6496 idiomatic and efficient design.
6499 * rustdoc output now indicates the stability levels of API's.
6500 * The `--crate-name` flag can specify the name of the crate
6501 being compiled, like `#[crate_name]`.
6502 * The `-C metadata` specifies additional metadata to hash into
6503 symbol names, and `-C extra-filename` specifies additional
6504 information to put into the output filename, for use by the
6505 package manager for versioning.
6506 * debug info generation has continued to improve and should be
6507 more reliable under both gdb and lldb.
6508 * rustc has experimental support for compiling in parallel
6509 using the `-C codegen-units` flag.
6510 * rustc no longer encodes rpath information into binaries by
6514 * Stack usage has been optimized with LLVM lifetime annotations.
6515 * Official Rust binaries on Linux are more compatible with older
6516 kernels and distributions, built on CentOS 5.10.
6519 Version 0.11.0 (2014-07-02)
6520 ==========================
6522 * ~1700 changes, numerous bugfixes
6525 * ~[T] has been removed from the language. This type is superseded by
6527 * ~str has been removed from the language. This type is superseded by
6529 * ~T has been removed from the language. This type is superseded by the
6531 * @T has been removed from the language. This type is superseded by the
6532 standard library's std::gc::Gc<T> type.
6533 * Struct fields are now all private by default.
6534 * Vector indices and shift amounts are both required to be a `uint`
6535 instead of any integral type.
6536 * Byte character, byte string, and raw byte string literals are now all
6537 supported by prefixing the normal literal with a `b`.
6538 * Multiple ABIs are no longer allowed in an ABI string
6539 * The syntax for lifetimes on closures/procedures has been tweaked
6540 slightly: `<'a>|A, B|: 'b + K -> T`
6541 * Floating point modulus has been removed from the language; however it
6542 is still provided by a library implementation.
6543 * Private enum variants are now disallowed.
6544 * The `priv` keyword has been removed from the language.
6545 * A closure can no longer be invoked through a &-pointer.
6546 * The `use foo, bar, baz;` syntax has been removed from the language.
6547 * The transmute intrinsic no longer works on type parameters.
6548 * Statics now allow blocks/items in their definition.
6549 * Trait bounds are separated from objects with + instead of : now.
6550 * Objects can no longer be read while they are mutably borrowed.
6551 * The address of a static is now marked as insignificant unless the
6552 #[inline(never)] attribute is placed it.
6553 * The #[unsafe_destructor] attribute is now behind a feature gate.
6554 * Struct literals are no longer allowed in ambiguous positions such as
6555 if, while, match, and for..in.
6556 * Declaration of lang items and intrinsics are now feature-gated by
6558 * Integral literals no longer default to `int`, and floating point
6559 literals no longer default to `f64`. Literals must be suffixed with an
6560 appropriate type if inference cannot determine the type of the
6562 * The Box<T> type is no longer implicitly borrowed to &mut T.
6563 * Procedures are now required to not capture borrowed references.
6566 * The standard library is now a "facade" over a number of underlying
6567 libraries. This means that development on the standard library should
6568 be speedier due to smaller crates, as well as a clearer line between
6570 * A new library, libcore, lives under the standard library's facade
6571 which is Rust's "0-assumption" library, suitable for embedded and
6572 kernel development for example.
6573 * A regex crate has been added to the standard distribution. This crate
6574 includes statically compiled regular expressions.
6575 * The unwrap/unwrap_err methods on Result require a Show bound for
6576 better error messages.
6577 * The return types of the std::comm primitives have been centralized
6578 around the Result type.
6579 * A number of I/O primitives have gained the ability to time out their
6581 * A number of I/O primitives have gained the ability to close their
6582 reading/writing halves to cancel pending operations.
6583 * Reverse iterator methods have been removed in favor of `rev()` on
6584 their forward-iteration counterparts.
6585 * A bitflags! macro has been added to enable easy interop with C and
6586 management of bit flags.
6587 * A debug_assert! macro is now provided which is disabled when
6588 `--cfg ndebug` is passed to the compiler.
6589 * A graphviz crate has been added for creating .dot files.
6590 * The std::cast module has been migrated into std::mem.
6591 * The std::local_data api has been migrated from freestanding functions
6592 to being based on methods.
6593 * The Pod trait has been renamed to Copy.
6594 * jemalloc has been added as the default allocator for types.
6595 * The API for allocating memory has been changed to use proper alignment
6596 and sized deallocation
6597 * Connecting a TcpStream or binding a TcpListener is now based on a
6598 string address and a u16 port. This allows connecting to a hostname as
6600 * The Reader trait now contains a core method, read_at_least(), which
6601 correctly handles many repeated 0-length reads.
6602 * The process-spawning API is now centered around a builder-style
6604 * The :? printing qualifier has been moved from the standard library to
6605 an external libdebug crate.
6606 * Eq/Ord have been renamed to PartialEq/PartialOrd. TotalEq/TotalOrd
6607 have been renamed to Eq/Ord.
6608 * The select/plural methods have been removed from format!. The escapes
6609 for { and } have also changed from \{ and \} to {{ and }},
6611 * The TaskBuilder API has been re-worked to be a true builder, and
6612 extension traits for spawning native/green tasks have been added.
6615 * All breaking changes to the language or libraries now have their
6616 commit message annotated with `[breaking-change]` to allow for easy
6617 discovery of breaking changes.
6618 * The compiler will now try to suggest how to annotate lifetimes if a
6619 lifetime-related error occurs.
6620 * Debug info continues to be improved greatly with general bug fixes and
6621 better support for situations like link time optimization (LTO).
6622 * Usage of syntax extensions when cross-compiling has been fixed.
6623 * Functionality equivalent to GCC & Clang's -ffunction-sections,
6624 -fdata-sections and --gc-sections has been enabled by default
6625 * The compiler is now stricter about where it will load module files
6626 from when a module is declared via `mod foo;`.
6627 * The #[phase(syntax)] attribute has been renamed to #[phase(plugin)].
6628 Syntax extensions are now discovered via a "plugin registrar" type
6629 which will be extended in the future to other various plugins.
6630 * Lints have been restructured to allow for dynamically loadable lints.
6631 * A number of rustdoc improvements:
6632 * The HTML output has been visually redesigned.
6633 * Markdown is now powered by hoedown instead of sundown.
6634 * Searching heuristics have been greatly improved.
6635 * The search index has been reduced in size by a great amount.
6636 * Cross-crate documentation via `pub use` has been greatly improved.
6637 * Primitive types are now hyperlinked and documented.
6638 * Documentation has been moved from static.rust-lang.org/doc to
6640 * A new sandbox, play.rust-lang.org, is available for running and
6641 sharing rust code examples on-line.
6642 * Unused attributes are now more robustly warned about.
6643 * The dead_code lint now warns about unused struct fields.
6644 * Cross-compiling to iOS is now supported.
6645 * Cross-compiling to mipsel is now supported.
6646 * Stability attributes are now inherited by default and no longer apply
6647 to intra-crate usage, only inter-crate usage.
6648 * Error message related to non-exhaustive match expressions have been
6652 Version 0.10 (2014-04-03)
6653 =========================
6655 * ~1500 changes, numerous bugfixes
6658 * A new RFC process is now in place for modifying the language.
6659 * Patterns with `@`-pointers have been removed from the language.
6660 * Patterns with unique vectors (`~[T]`) have been removed from the
6662 * Patterns with unique strings (`~str`) have been removed from the
6664 * `@str` has been removed from the language.
6665 * `@[T]` has been removed from the language.
6666 * `@self` has been removed from the language.
6667 * `@Trait` has been removed from the language.
6668 * Headers on `~` allocations which contain `@` boxes inside the type for
6669 reference counting have been removed.
6670 * The semantics around the lifetimes of temporary expressions have changed,
6671 see #3511 and #11585 for more information.
6672 * Cross-crate syntax extensions are now possible, but feature gated. See
6673 #11151 for more information. This includes both `macro_rules!` macros as
6674 well as syntax extensions such as `format!`.
6675 * New lint modes have been added, and older ones have been turned on to be
6677 * Unnecessary parentheses
6680 * Uppercase variables
6681 * Publicly visible private types
6682 * `#[deriving]` with raw pointers
6683 * Unsafe functions can no longer be coerced to closures.
6684 * Various obscure macros such as `log_syntax!` are now behind feature gates.
6685 * The `#[simd]` attribute is now behind a feature gate.
6686 * Visibility is no longer allowed on `extern crate` statements, and
6687 unnecessary visibility (`priv`) is no longer allowed on `use` statements.
6688 * Trailing commas are now allowed in argument lists and tuple patterns.
6689 * The `do` keyword has been removed, it is now a reserved keyword.
6690 * Default type parameters have been implemented, but are feature gated.
6691 * Borrowed variables through captures in closures are now considered soundly.
6692 * `extern mod` is now `extern crate`
6693 * The `Freeze` trait has been removed.
6694 * The `Share` trait has been added for types that can be shared among
6696 * Labels in macros are now hygienic.
6697 * Expression/statement macro invocations can be delimited with `{}` now.
6698 * Treatment of types allowed in `static mut` locations has been tweaked.
6699 * The `*` and `.` operators are now overloadable through the `Deref` and
6701 * `~Trait` and `proc` no longer have `Send` bounds by default.
6702 * Partial type hints are now supported with the `_` type marker.
6703 * An `Unsafe` type was introduced for interior mutability. It is now
6704 considered undefined to transmute from `&T` to `&mut T` without using the
6706 * The #[linkage] attribute was implemented for extern statics/functions.
6707 * The inner attribute syntax has changed from `#[foo];` to `#![foo]`.
6708 * `Pod` was renamed to `Copy`.
6711 * The `libextra` library has been removed. It has now been decomposed into
6712 component libraries with smaller and more focused nuggets of
6713 functionality. The full list of libraries can be found on the
6714 documentation index page.
6715 * std: `std::condition` has been removed. All I/O errors are now propagated
6716 through the `Result` type. In order to assist with error handling, a
6717 `try!` macro for unwrapping errors with an early return and a lint for
6718 unused results has been added. See #12039 for more information.
6719 * std: The `vec` module has been renamed to `slice`.
6720 * std: A new vector type, `Vec<T>`, has been added in preparation for DST.
6721 This will become the only growable vector in the future.
6722 * std: `std::io` now has more public re-exports. Types such as `BufferedReader`
6723 are now found at `std::io::BufferedReader` instead of
6724 `std::io::buffered::BufferedReader`.
6725 * std: `print` and `println` are no longer in the prelude, the `print!` and
6726 `println!` macros are intended to be used instead.
6727 * std: `Rc` now has a `Weak` pointer for breaking cycles, and it no longer
6728 attempts to statically prevent cycles.
6729 * std: The standard distribution is adopting the policy of pushing failure
6730 to the user rather than failing in libraries. Many functions (such as
6731 `slice::last()`) now return `Option<T>` instead of `T` + failing.
6732 * std: `fmt::Default` has been renamed to `fmt::Show`, and it now has a new
6733 deriving mode: `#[deriving(Show)]`.
6734 * std: `ToStr` is now implemented for all types implementing `Show`.
6735 * std: The formatting trait methods now take `&self` instead of `&T`
6736 * std: The `invert()` method on iterators has been renamed to `rev()`
6737 * std: `std::num` has seen a reduction in the genericity of its traits,
6738 consolidating functionality into a few core traits.
6739 * std: Backtraces are now printed on task failure if the environment
6740 variable `RUST_BACKTRACE` is present.
6741 * std: Naming conventions for iterators have been standardized. More details
6742 can be found on the wiki's style guide.
6743 * std: `eof()` has been removed from the `Reader` trait. Specific types may
6744 still implement the function.
6745 * std: Networking types are now cloneable to allow simultaneous reads/writes.
6746 * std: `assert_approx_eq!` has been removed
6747 * std: The `e` and `E` formatting specifiers for floats have been added to
6748 print them in exponential notation.
6749 * std: The `Times` trait has been removed
6750 * std: Indications of variance and opting out of builtin bounds is done
6751 through marker types in `std::kinds::marker` now
6752 * std: `hash` has been rewritten, `IterBytes` has been removed, and
6753 `#[deriving(Hash)]` is now possible.
6754 * std: `SharedChan` has been removed, `Sender` is now cloneable.
6755 * std: `Chan` and `Port` were renamed to `Sender` and `Receiver`.
6756 * std: `Chan::new` is now `channel()`.
6757 * std: A new synchronous channel type has been implemented.
6758 * std: A `select!` macro is now provided for selecting over `Receiver`s.
6759 * std: `hashmap` and `trie` have been moved to `libcollections`
6760 * std: `run` has been rolled into `io::process`
6761 * std: `assert_eq!` now uses `{}` instead of `{:?}`
6762 * std: The equality and comparison traits have seen some reorganization.
6763 * std: `rand` has moved to `librand`.
6764 * std: `to_{lower,upper}case` has been implemented for `char`.
6765 * std: Logging has been moved to `liblog`.
6766 * collections: `HashMap` has been rewritten for higher performance and less
6768 * native: The default runtime is now `libnative`. If `libgreen` is desired,
6769 it can be booted manually. The runtime guide has more information and
6771 * native: All I/O functionality except signals has been implemented.
6772 * green: Task spawning with `libgreen` has been optimized with stack caching
6773 and various trimming of code.
6774 * green: Tasks spawned by `libgreen` now have an unmapped guard page.
6775 * sync: The `extra::sync` module has been updated to modern rust (and moved
6776 to the `sync` library), tweaking and improving various interfaces while
6777 dropping redundant functionality.
6778 * sync: A new `Barrier` type has been added to the `sync` library.
6779 * sync: An efficient mutex for native and green tasks has been implemented.
6780 * serialize: The `base64` module has seen some improvement. It treats
6781 newlines better, has non-string error values, and has seen general
6783 * fourcc: A `fourcc!` macro was introduced
6784 * hexfloat: A `hexfloat!` macro was implemented for specifying floats via a
6785 hexadecimal literal.
6788 * `rustpkg` has been deprecated and removed from the main repository. Its
6789 replacement, `cargo`, is under development.
6790 * Nightly builds of rust are now available
6791 * The memory usage of rustc has been improved many times throughout this
6793 * The build process supports disabling rpath support for the rustc binary
6795 * Code generation has improved in some cases, giving more information to the
6796 LLVM optimization passes to enable more extensive optimizations.
6797 * Debuginfo compatibility with lldb on OSX has been restored.
6798 * The master branch is now gated on an android bot, making building for
6799 android much more reliable.
6800 * Output flags have been centralized into one `--emit` flag.
6801 * Crate type flags have been centralized into one `--crate-type` flag.
6802 * Codegen flags have been consolidated behind a `-C` flag.
6803 * Linking against outdated crates now has improved error messages.
6804 * Error messages with lifetimes will often suggest how to annotate the
6805 function to fix the error.
6806 * Many more types are documented in the standard library, and new guides
6808 * Many `rustdoc` improvements:
6809 * code blocks are syntax highlighted.
6810 * render standalone markdown files.
6811 * the --test flag tests all code blocks by default.
6812 * exported macros are displayed.
6813 * re-exported types have their documentation inlined at the location of the
6815 * search works across crates that have been rendered to the same output
6819 Version 0.9 (2014-01-09)
6820 ==========================
6822 * ~1800 changes, numerous bugfixes
6825 * The `float` type has been removed. Use `f32` or `f64` instead.
6826 * A new facility for enabling experimental features (feature gating) has
6827 been added, using the crate-level `#[feature(foo)]` attribute.
6828 * Managed boxes (@) are now behind a feature gate
6829 (`#[feature(managed_boxes)]`) in preparation for future removal. Use the
6830 standard library's `Gc` or `Rc` types instead.
6831 * `@mut` has been removed. Use `std::cell::{Cell, RefCell}` instead.
6832 * Jumping back to the top of a loop is now done with `continue` instead of
6834 * Strings can no longer be mutated through index assignment.
6835 * Raw strings can be created via the basic `r"foo"` syntax or with matched
6836 hash delimiters, as in `r###"foo"###`.
6837 * `~fn` is now written `proc (args) -> retval { ... }` and may only be
6839 * The `&fn` type is now written `|args| -> ret` to match the literal form.
6840 * `@fn`s have been removed.
6841 * `do` only works with procs in order to make it obvious what the cost
6843 * Single-element tuple-like structs can no longer be dereferenced to
6844 obtain the inner value. A more comprehensive solution for overloading
6845 the dereference operator will be provided in the future.
6846 * The `#[link(...)]` attribute has been replaced with
6847 `#[crate_id = "name#vers"]`.
6848 * Empty `impl`s must be terminated with empty braces and may not be
6849 terminated with a semicolon.
6850 * Keywords are no longer allowed as lifetime names; the `self` lifetime
6851 no longer has any special meaning.
6852 * The old `fmt!` string formatting macro has been removed.
6853 * `printf!` and `printfln!` (old-style formatting) removed in favor of
6854 `print!` and `println!`.
6855 * `mut` works in patterns now, as in `let (mut x, y) = (1, 2);`.
6856 * The `extern mod foo (name = "bar")` syntax has been removed. Use
6857 `extern mod foo = "bar"` instead.
6858 * New reserved keywords: `alignof`, `offsetof`, `sizeof`.
6859 * Macros can have attributes.
6860 * Macros can expand to items with attributes.
6861 * Macros can expand to multiple items.
6862 * The `asm!` macro is feature-gated (`#[feature(asm)]`).
6863 * Comments may be nested.
6864 * Values automatically coerce to trait objects they implement, without
6866 * Enum discriminants are no longer an entire word but as small as needed to
6867 contain all the variants. The `repr` attribute can be used to override
6868 the discriminant size, as in `#[repr(int)]` for integer-sized, and
6869 `#[repr(C)]` to match C enums.
6870 * Non-string literals are not allowed in attributes (they never worked).
6871 * The FFI now supports variadic functions.
6872 * Octal numeric literals, as in `0o7777`.
6873 * The `concat!` syntax extension performs compile-time string concatenation.
6874 * The `#[fixed_stack_segment]` and `#[rust_stack]` attributes have been
6875 removed as Rust no longer uses segmented stacks.
6876 * Non-ascii identifiers are feature-gated (`#[feature(non_ascii_idents)]`).
6877 * Ignoring all fields of an enum variant or tuple-struct is done with `..`,
6878 not `*`; ignoring remaining fields of a struct is also done with `..`,
6879 not `_`; ignoring a slice of a vector is done with `..`, not `.._`.
6880 * `rustc` supports the "win64" calling convention via `extern "win64"`.
6881 * `rustc` supports the "system" calling convention, which defaults to the
6882 preferred convention for the target platform, "stdcall" on 32-bit Windows,
6884 * The `type_overflow` lint (default: warn) checks literals for overflow.
6885 * The `unsafe_block` lint (default: allow) checks for usage of `unsafe`.
6886 * The `attribute_usage` lint (default: warn) warns about unknown
6888 * The `unknown_features` lint (default: warn) warns about unknown
6890 * The `dead_code` lint (default: warn) checks for dead code.
6891 * Rust libraries can be linked statically to one another
6892 * `#[link_args]` is behind the `link_args` feature gate.
6893 * Native libraries are now linked with `#[link(name = "foo")]`
6894 * Native libraries can be statically linked to a rust crate
6895 (`#[link(name = "foo", kind = "static")]`).
6896 * Native OS X frameworks are now officially supported
6897 (`#[link(name = "foo", kind = "framework")]`).
6898 * The `#[thread_local]` attribute creates thread-local (not task-local)
6899 variables. Currently behind the `thread_local` feature gate.
6900 * The `return` keyword may be used in closures.
6901 * Types that can be copied via a memcpy implement the `Pod` kind.
6902 * The `cfg` attribute can now be used on struct fields and enum variants.
6905 * std: The `option` and `result` API's have been overhauled to make them
6906 simpler, more consistent, and more composable.
6907 * std: The entire `std::io` module has been replaced with one that is
6908 more comprehensive and that properly interfaces with the underlying
6909 scheduler. File, TCP, UDP, Unix sockets, pipes, and timers are all
6911 * std: `io::util` contains a number of useful implementations of
6912 `Reader` and `Writer`, including `NullReader`, `NullWriter`,
6913 `ZeroReader`, `TeeReader`.
6914 * std: The reference counted pointer type `extra::rc` moved into std.
6915 * std: The `Gc` type in the `gc` module will replace `@` (it is currently
6916 just a wrapper around it).
6917 * std: The `Either` type has been removed.
6918 * std: `fmt::Default` can be implemented for any type to provide default
6919 formatting to the `format!` macro, as in `format!("{}", myfoo)`.
6920 * std: The `rand` API continues to be tweaked.
6921 * std: The `rust_begin_unwind` function, useful for inserting breakpoints
6922 on failure in gdb, is now named `rust_fail`.
6923 * std: The `each_key` and `each_value` methods on `HashMap` have been
6924 replaced by the `keys` and `values` iterators.
6925 * std: Functions dealing with type size and alignment have moved from the
6926 `sys` module to the `mem` module.
6927 * std: The `path` module was written and API changed.
6928 * std: `str::from_utf8` has been changed to cast instead of allocate.
6929 * std: `starts_with` and `ends_with` methods added to vectors via the
6930 `ImmutableEqVector` trait, which is in the prelude.
6931 * std: Vectors can be indexed with the `get_opt` method, which returns `None`
6932 if the index is out of bounds.
6933 * std: Task failure no longer propagates between tasks, as the model was
6934 complex, expensive, and incompatible with thread-based tasks.
6935 * std: The `Any` type can be used for dynamic typing.
6936 * std: `~Any` can be passed to the `fail!` macro and retrieved via
6938 * std: Methods that produce iterators generally do not have an `_iter`
6940 * std: `cell::Cell` and `cell::RefCell` can be used to introduce mutability
6941 roots (mutable fields, etc.). Use instead of e.g. `@mut`.
6942 * std: `util::ignore` renamed to `prelude::drop`.
6943 * std: Slices have `sort` and `sort_by` methods via the `MutableVector`
6945 * std: `vec::raw` has seen a lot of cleanup and API changes.
6946 * std: The standard library no longer includes any C++ code, and very
6947 minimal C, eliminating the dependency on libstdc++.
6948 * std: Runtime scheduling and I/O functionality has been factored out into
6949 extensible interfaces and is now implemented by two different crates:
6950 libnative, for native threading and I/O; and libgreen, for green threading
6951 and I/O. This paves the way for using the standard library in more limited
6952 embedded environments.
6953 * std: The `comm` module has been rewritten to be much faster, have a
6954 simpler, more consistent API, and to work for both native and green
6956 * std: All libuv dependencies have been moved into the rustuv crate.
6957 * native: New implementations of runtime scheduling on top of OS threads.
6958 * native: New native implementations of TCP, UDP, file I/O, process spawning,
6960 * green: The green thread scheduler and message passing types are almost
6962 * extra: The `flatpipes` module had bitrotted and was removed.
6963 * extra: All crypto functions have been removed and Rust now has a policy of
6964 not reimplementing crypto in the standard library. In the future crypto
6965 will be provided by external crates with bindings to established libraries.
6966 * extra: `c_vec` has been modernized.
6967 * extra: The `sort` module has been removed. Use the `sort` method on
6971 * The `rust` and `rusti` commands have been removed, due to lack of
6973 * `rustdoc` was completely rewritten.
6974 * `rustdoc` can test code examples in documentation.
6975 * `rustpkg` can test packages with the argument, 'test'.
6976 * `rustpkg` supports arbitrary dependencies, including C libraries.
6977 * `rustc`'s support for generating debug info is improved again.
6978 * `rustc` has better error reporting for unbalanced delimiters.
6979 * `rustc`'s JIT support was removed due to bitrot.
6980 * Executables and static libraries can be built with LTO (-Z lto)
6981 * `rustc` adds a `--dep-info` flag for communicating dependencies to
6985 Version 0.8 (2013-09-26)
6986 ============================
6988 * ~2200 changes, numerous bugfixes
6991 * The `for` loop syntax has changed to work with the `Iterator` trait.
6992 * At long last, unwinding works on Windows.
6993 * Default methods are ready for use.
6994 * Many trait inheritance bugs fixed.
6995 * Owned and borrowed trait objects work more reliably.
6996 * `copy` is no longer a keyword. It has been replaced by the `Clone` trait.
6997 * rustc can omit emission of code for the `debug!` macro if it is passed
6999 * mod.rs is now "blessed". When loading `mod foo;`, rustc will now look
7000 for foo.rs, then foo/mod.rs, and will generate an error when both are
7002 * Strings no longer contain trailing nulls. The new `std::c_str` module
7003 provides new mechanisms for converting to C strings.
7004 * The type of foreign functions is now `extern "C" fn` instead of `*u8'.
7005 * The FFI has been overhauled such that foreign functions are called directly,
7006 instead of through a stack-switching wrapper.
7007 * Calling a foreign function must be done through a Rust function with the
7008 `#[fixed_stack_segment]` attribute.
7009 * The `externfn!` macro can be used to declare both a foreign function and
7010 a `#[fixed_stack_segment]` wrapper at once.
7011 * `pub` and `priv` modifiers on `extern` blocks are no longer parsed.
7012 * `unsafe` is no longer allowed on extern fns - they are all unsafe.
7013 * `priv` is disallowed everywhere except for struct fields and enum variants.
7014 * `&T` (besides `&'static T`) is no longer allowed in `@T`.
7015 * `ref` bindings in irrefutable patterns work correctly now.
7016 * `char` is now prevented from containing invalid code points.
7017 * Casting to `bool` is no longer allowed.
7018 * `\0` is now accepted as an escape in chars and strings.
7019 * `yield` is a reserved keyword.
7020 * `typeof` is a reserved keyword.
7021 * Crates may be imported by URL with `extern mod foo = "url";`.
7022 * Explicit enum discriminants may be given as uints as in `enum E { V = 0u }`
7023 * Static vectors can be initialized with repeating elements,
7024 e.g. `static foo: [u8, .. 100]: [0, .. 100];`.
7025 * Static structs can be initialized with functional record update,
7026 e.g. `static foo: Foo = Foo { a: 5, .. bar };`.
7027 * `cfg!` can be used to conditionally execute code based on the crate
7028 configuration, similarly to `#[cfg(...)]`.
7029 * The `unnecessary_qualification` lint detects unneeded module
7030 prefixes (default: allow).
7031 * Arithmetic operations have been implemented on the SIMD types in
7032 `std::unstable::simd`.
7033 * Exchange allocation headers were removed, reducing memory usage.
7034 * `format!` implements a completely new, extensible, and higher-performance
7035 string formatting system. It will replace `fmt!`.
7036 * `print!` and `println!` write formatted strings (using the `format!`
7037 extension) to stdout.
7038 * `write!` and `writeln!` write formatted strings (using the `format!`
7039 extension) to the new Writers in `std::rt::io`.
7040 * The library section in which a function or static is placed may
7041 be specified with `#[link_section = "..."]`.
7042 * The `proto!` syntax extension for defining bounded message protocols
7044 * `macro_rules!` is hygienic for `let` declarations.
7045 * The `#[export_name]` attribute specifies the name of a symbol.
7046 * `unreachable!` can be used to indicate unreachable code, and fails
7050 * std: Transitioned to the new runtime, written in Rust.
7051 * std: Added an experimental I/O library, `rt::io`, based on the new
7053 * std: A new generic `range` function was added to the prelude, replacing
7054 `uint::range` and friends.
7055 * std: `range_rev` no longer exists. Since range is an iterator it can be
7056 reversed with `range(lo, hi).invert()`.
7057 * std: The `chain` method on option renamed to `and_then`; `unwrap_or_default`
7058 renamed to `unwrap_or`.
7059 * std: The `iterator` module was renamed to `iter`.
7060 * std: Integral types now support the `checked_add`, `checked_sub`, and
7061 `checked_mul` operations for detecting overflow.
7062 * std: Many methods in `str`, `vec`, `option, `result` were renamed for
7064 * std: Methods are standardizing on conventions for casting methods:
7065 `to_foo` for copying, `into_foo` for moving, `as_foo` for temporary
7067 * std: The `CString` type in `c_str` provides new ways to convert to and
7069 * std: `DoubleEndedIterator` can yield elements in two directions.
7070 * std: The `mut_split` method on vectors partitions an `&mut [T]` into
7072 * std: `str::from_bytes` renamed to `str::from_utf8`.
7073 * std: `pop_opt` and `shift_opt` methods added to vectors.
7074 * std: The task-local data interface no longer uses @, and keys are
7075 no longer function pointers.
7076 * std: The `swap_unwrap` method of `Option` renamed to `take_unwrap`.
7077 * std: Added `SharedPort` to `comm`.
7078 * std: `Eq` has a default method for `ne`; only `eq` is required
7080 * std: `Ord` has default methods for `le`, `gt` and `ge`; only `lt`
7081 is required in implementations.
7082 * std: `is_utf8` performance is improved, impacting many string functions.
7083 * std: `os::MemoryMap` provides cross-platform mmap.
7084 * std: `ptr::offset` is now unsafe, but also more optimized. Offsets that
7085 are not 'in-bounds' are considered undefined.
7086 * std: Many freestanding functions in `vec` removed in favor of methods.
7087 * std: Many freestanding functions on scalar types removed in favor of
7089 * std: Many options to task builders were removed since they don't make
7090 sense in the new scheduler design.
7091 * std: More containers implement `FromIterator` so can be created by the
7093 * std: More complete atomic types in `unstable::atomics`.
7094 * std: `comm::PortSet` removed.
7095 * std: Mutating methods in the `Set` and `Map` traits have been moved into
7096 the `MutableSet` and `MutableMap` traits. `Container::is_empty`,
7097 `Map::contains_key`, `MutableMap::insert`, and `MutableMap::remove` have
7098 default implementations.
7099 * std: Various `from_str` functions were removed in favor of a generic
7100 `from_str` which is available in the prelude.
7101 * std: `util::unreachable` removed in favor of the `unreachable!` macro.
7102 * extra: `dlist`, the doubly-linked list was modernized.
7103 * extra: Added a `hex` module with `ToHex` and `FromHex` traits.
7104 * extra: Added `glob` module, replacing `std::os::glob`.
7105 * extra: `rope` was removed.
7106 * extra: `deque` was renamed to `ringbuf`. `RingBuf` implements `Deque`.
7107 * extra: `net`, and `timer` were removed. The experimental replacements
7108 are `std::rt::io::net` and `std::rt::io::timer`.
7109 * extra: Iterators implemented for `SmallIntMap`.
7110 * extra: Iterators implemented for `Bitv` and `BitvSet`.
7111 * extra: `SmallIntSet` removed. Use `BitvSet`.
7112 * extra: Performance of JSON parsing greatly improved.
7113 * extra: `semver` updated to SemVer 2.0.0.
7114 * extra: `term` handles more terminals correctly.
7115 * extra: `dbg` module removed.
7116 * extra: `par` module removed.
7117 * extra: `future` was cleaned up, with some method renames.
7118 * extra: Most free functions in `getopts` were converted to methods.
7121 * rustc's debug info generation (`-Z debug-info`) is greatly improved.
7122 * rustc accepts `--target-cpu` to compile to a specific CPU architecture,
7123 similarly to gcc's `--march` flag.
7124 * rustc's performance compiling small crates is much better.
7125 * rustpkg has received many improvements.
7126 * rustpkg supports git tags as package IDs.
7127 * rustpkg builds into target-specific directories so it can be used for
7129 * The number of concurrent test tasks is controlled by the environment
7130 variable RUST_TEST_TASKS.
7131 * The test harness can now report metrics for benchmarks.
7132 * All tools have man pages.
7133 * Programs compiled with `--test` now support the `-h` and `--help` flags.
7134 * The runtime uses jemalloc for allocations.
7135 * Segmented stacks are temporarily disabled as part of the transition to
7136 the new runtime. Stack overflows are possible!
7137 * A new documentation backend, rustdoc_ng, is available for use. It is
7138 still invoked through the normal `rustdoc` command.
7141 Version 0.7 (2013-07-03)
7142 =======================
7144 * ~2000 changes, numerous bugfixes
7147 * `impl`s no longer accept a visibility qualifier. Put them on methods
7149 * The borrow checker has been rewritten with flow-sensitivity, fixing
7150 many bugs and inconveniences.
7151 * The `self` parameter no longer implicitly means `&'self self`,
7152 and can be explicitly marked with a lifetime.
7153 * Overloadable compound operators (`+=`, etc.) have been temporarily
7154 removed due to bugs.
7155 * The `for` loop protocol now requires `for`-iterators to return `bool`
7156 so they compose better.
7157 * The `Durable` trait is replaced with the `'static` bounds.
7158 * Trait default methods work more often.
7159 * Structs with the `#[packed]` attribute have byte alignment and
7160 no padding between fields.
7161 * Type parameters bound by `Copy` must now be copied explicitly with
7163 * It is now illegal to move out of a dereferenced unsafe pointer.
7164 * `Option<~T>` is now represented as a nullable pointer.
7165 * `@mut` does dynamic borrow checks correctly.
7166 * The `main` function is only detected at the topmost level of the crate.
7167 The `#[main]` attribute is still valid anywhere.
7168 * Struct fields may no longer be mutable. Use inherited mutability.
7169 * The `#[no_send]` attribute makes a type that would otherwise be
7171 * The `#[no_freeze]` attribute makes a type that would otherwise be
7173 * Unbounded recursion will abort the process after reaching the limit
7174 specified by the `RUST_MAX_STACK` environment variable (default: 1GB).
7175 * The `vecs_implicitly_copyable` lint mode has been removed. Vectors
7176 are never implicitly copyable.
7177 * `#[static_assert]` makes compile-time assertions about static bools.
7178 * At long last, 'argument modes' no longer exist.
7179 * The rarely used `use mod` statement no longer exists.
7182 * `fail!` and `assert!` accept `~str`, `&'static str` or `fmt!`-style
7184 * `Encodable`, `Decodable`, `Ord`, `TotalOrd`, `TotalEq`, `DeepClone`,
7185 `Rand`, `Zero` and `ToStr` can all be automatically derived with
7187 * The `bytes!` macro returns a vector of bytes for string, u8, char,
7188 and unsuffixed integer literals.
7191 * The `core` crate was renamed to `std`.
7192 * The `std` crate was renamed to `extra`.
7193 * More and improved documentation.
7194 * std: `iterator` module for external iterator objects.
7195 * Many old-style (internal, higher-order function) iterators replaced by
7196 implementations of `Iterator`.
7197 * std: Many old internal vector and string iterators,
7198 incl. `any`, `all`. removed.
7199 * std: The `finalize` method of `Drop` renamed to `drop`.
7200 * std: The `drop` method now takes `&mut self` instead of `&self`.
7201 * std: The prelude no longer re-exports any modules, only types and traits.
7202 * std: Prelude additions: `print`, `println`, `FromStr`, `ApproxEq`, `Equiv`,
7203 `Iterator`, `IteratorUtil`, many numeric traits, many tuple traits.
7204 * std: New numeric traits: `Fractional`, `Real`, `RealExt`, `Integer`, `Ratio`,
7205 `Algebraic`, `Trigonometric`, `Exponential`, `Primitive`.
7206 * std: Tuple traits and accessors defined for up to 12-tuples, e.g.
7207 `(0, 1, 2).n2()` or `(0, 1, 2).n2_ref()`.
7208 * std: Many types implement `Clone`.
7209 * std: `path` type renamed to `Path`.
7210 * std: `mut` module and `Mut` type removed.
7211 * std: Many standalone functions removed in favor of methods and iterators
7212 in `vec`, `str`. In the future methods will also work as functions.
7213 * std: `reinterpret_cast` removed. Use `transmute`.
7214 * std: ascii string handling in `std::ascii`.
7215 * std: `Rand` is implemented for ~/@.
7216 * std: `run` module for spawning processes overhauled.
7217 * std: Various atomic types added to `unstable::atomic`.
7218 * std: Various types implement `Zero`.
7219 * std: `LinearMap` and `LinearSet` renamed to `HashMap` and `HashSet`.
7220 * std: Borrowed pointer functions moved from `ptr` to `borrow`.
7221 * std: Added `os::mkdir_recursive`.
7222 * std: Added `os::glob` function performs filesystems globs.
7223 * std: `FuzzyEq` renamed to `ApproxEq`.
7224 * std: `Map` now defines `pop` and `swap` methods.
7225 * std: `Cell` constructors converted to static methods.
7226 * extra: `rc` module adds the reference counted pointers, `Rc` and `RcMut`.
7227 * extra: `flate` module moved from `std` to `extra`.
7228 * extra: `fileinput` module for iterating over a series of files.
7229 * extra: `Complex` number type and `complex` module.
7230 * extra: `Rational` number type and `rational` module.
7231 * extra: `BigInt`, `BigUint` implement numeric and comparison traits.
7232 * extra: `term` uses terminfo now, is more correct.
7233 * extra: `arc` functions converted to methods.
7234 * extra: Implementation of fixed output size variations of SHA-2.
7237 * `unused_variable` lint mode for unused variables (default: warn).
7238 * `unused_unsafe` lint mode for detecting unnecessary `unsafe` blocks
7240 * `unused_mut` lint mode for identifying unused `mut` qualifiers
7242 * `dead_assignment` lint mode for unread variables (default: warn).
7243 * `unnecessary_allocation` lint mode detects some heap allocations that are
7244 immediately borrowed so could be written without allocating (default: warn).
7245 * `missing_doc` lint mode (default: allow).
7246 * `unreachable_code` lint mode (default: warn).
7247 * The `rusti` command has been rewritten and a number of bugs addressed.
7248 * rustc outputs in color on more terminals.
7249 * rustc accepts a `--link-args` flag to pass arguments to the linker.
7250 * rustc accepts a `-Z print-link-args` flag for debugging linkage.
7251 * Compiling with `-g` will make the binary record information about
7252 dynamic borrowcheck failures for debugging.
7253 * rustdoc has a nicer stylesheet.
7254 * Various improvements to rustdoc.
7255 * Improvements to rustpkg (see the detailed release notes).
7258 Version 0.6 (2013-04-03)
7259 ========================
7261 * ~2100 changes, numerous bugfixes
7264 * The self type parameter in traits is now spelled `Self`
7265 * The `self` parameter in trait and impl methods must now be explicitly
7266 named (for example: `fn f(&self) { }`). Implicit self is deprecated.
7267 * Static methods no longer require the `static` keyword and instead
7268 are distinguished by the lack of a `self` parameter
7269 * Replaced the `Durable` trait with the `'static` lifetime
7270 * The old closure type syntax with the trailing sigil has been
7271 removed in favor of the more consistent leading sigil
7272 * `super` is a keyword, and may be prefixed to paths
7273 * Trait bounds are separated with `+` instead of whitespace
7274 * Traits are implemented with `impl Trait for Type`
7275 instead of `impl Type: Trait`
7276 * Lifetime syntax is now `&'l foo` instead of `&l/foo`
7277 * The `export` keyword has finally been removed
7278 * The `move` keyword has been removed (see "Semantic changes")
7279 * The interior mutability qualifier on vectors, `[mut T]`, has been
7280 removed. Use `&mut [T]`, etc.
7281 * `mut` is no longer valid in `~mut T`. Use inherited mutability
7282 * `fail` is no longer a keyword. Use `fail!()`
7283 * `assert` is no longer a keyword. Use `assert!()`
7284 * `log` is no longer a keyword. use `debug!`, etc.
7285 * 1-tuples may be represented as `(T,)`
7286 * Struct fields may no longer be `mut`. Use inherited mutability,
7287 `@mut T`, `core::mut` or `core::cell`
7288 * `extern mod { ... }` is no longer valid syntax for foreign
7289 function modules. Use extern blocks: `extern { ... }`
7290 * Newtype enums removed. Use tuple-structs.
7291 * Trait implementations no longer support visibility modifiers
7292 * Pattern matching over vectors improved and expanded
7293 * `const` renamed to `static` to correspond to lifetime name,
7294 and make room for future `static mut` unsafe mutable globals.
7295 * Replaced `#[deriving_eq]` with `#[deriving(Eq)]`, etc.
7296 * `Clone` implementations can be automatically generated with
7297 `#[deriving(Clone)]`
7298 * Casts to traits must use a pointer sigil, e.g. `@foo as @Bar`
7299 instead of `foo as Bar`.
7300 * Fixed length vector types are now written as `[int, .. 3]`
7301 instead of `[int * 3]`.
7302 * Fixed length vector types can express the length as a constant
7303 expression. (ex: `[int, .. GL_BUFFER_SIZE - 2]`)
7306 * Types with owned pointers or custom destructors move by default,
7307 eliminating the `move` keyword
7308 * All foreign functions are considered unsafe
7309 * &mut is now unaliasable
7310 * Writes to borrowed @mut pointers are prevented dynamically
7312 * The name of the main function can be customized using #[main]
7313 * The default type of an inferred closure is &fn instead of @fn
7314 * `use` statements may no longer be "chained" - they cannot import
7315 identifiers imported by previous `use` statements
7316 * `use` statements are crate relative, importing from the "top"
7317 of the crate by default. Paths may be prefixed with `super::`
7318 or `self::` to change the search behavior.
7319 * Method visibility is inherited from the implementation declaration
7320 * Structural records have been removed
7321 * Many more types can be used in static items, including enums
7322 'static-lifetime pointers and vectors
7323 * Pattern matching over vectors improved and expanded
7324 * Typechecking of closure types has been overhauled to
7325 improve inference and eliminate unsoundness
7326 * Macros leave scope at the end of modules, unless that module is
7327 tagged with #[macro_escape]
7330 * Added big integers to `std::bigint`
7331 * Removed `core::oldcomm` module
7332 * Added pipe-based `core::comm` module
7333 * Numeric traits have been reorganized under `core::num`
7334 * `vec::slice` finally returns a slice
7335 * `debug!` and friends don't require a format string, e.g. `debug!(Foo)`
7336 * Containers reorganized around traits in `core::container`
7337 * `core::dvec` removed, `~[T]` is a drop-in replacement
7338 * `core::send_map` renamed to `core::hashmap`
7339 * `std::map` removed; replaced with `core::hashmap`
7340 * `std::treemap` reimplemented as an owned balanced tree
7341 * `std::deque` and `std::smallintmap` reimplemented as owned containers
7342 * `core::trie` added as a fast ordered map for integer keys
7343 * Set types added to `core::hashmap`, `core::trie` and `std::treemap`
7344 * `Ord` split into `Ord` and `TotalOrd`. `Ord` is still used to
7345 overload the comparison operators, whereas `TotalOrd` is used
7346 by certain container types
7349 * Replaced the 'cargo' package manager with 'rustpkg'
7350 * Added all-purpose 'rust' tool
7351 * `rustc --test` now supports benchmarks with the `#[bench]` attribute
7352 * rustc now *attempts* to offer spelling suggestions
7353 * Improved support for ARM and Android
7354 * Preliminary MIPS backend
7355 * Improved foreign function ABI implementation for x86, x86_64
7356 * Various memory usage improvements
7357 * Rust code may be embedded in foreign code under limited circumstances
7358 * Inline assembler supported by new asm!() syntax extension.
7361 Version 0.5 (2012-12-21)
7362 ===========================
7364 * ~900 changes, numerous bugfixes
7367 * Removed `<-` move operator
7368 * Completed the transition from the `#fmt` extension syntax to `fmt!`
7369 * Removed old fixed length vector syntax - `[T]/N`
7370 * New token-based quasi-quoters, `quote_tokens!`, `quote_expr!`, etc.
7371 * Macros may now expand to items and statements
7372 * `a.b()` is always parsed as a method call, never as a field projection
7373 * `Eq` and `IterBytes` implementations can be automatically generated
7374 with `#[deriving_eq]` and `#[deriving_iter_bytes]` respectively
7375 * Removed the special crate language for `.rc` files
7376 * Function arguments may consist of any irrefutable pattern
7379 * `&` and `~` pointers may point to objects
7380 * Tuple structs - `struct Foo(Bar, Baz)`. Will replace newtype enums.
7381 * Enum variants may be structs
7382 * Destructors can be added to all nominal types with the Drop trait
7383 * Structs and nullary enum variants may be constants
7384 * Values that cannot be implicitly copied are now automatically moved
7385 without writing `move` explicitly
7386 * `&T` may now be coerced to `*T`
7387 * Coercions happen in `let` statements as well as function calls
7388 * `use` statements now take crate-relative paths
7389 * The module and type namespaces have been merged so that static
7390 method names can be resolved under the trait in which they are
7393 * Improved support for language features
7394 * Trait inheritance works in many scenarios
7395 * More support for explicit self arguments in methods - `self`, `&self`
7396 `@self`, and `~self` all generally work as expected
7397 * Static methods work in more situations
7398 * Experimental: Traits may declare default methods for the implementations
7402 * New condition handling system in `core::condition`
7403 * Timsort added to `std::sort`
7404 * New priority queue, `std::priority_queue`
7405 * Pipes for serializable types, `std::flatpipes'
7406 * Serialization overhauled to be trait-based
7407 * Expanded `getopts` definitions
7408 * Moved futures to `std`
7409 * More functions are pure now
7410 * `core::comm` renamed to `oldcomm`. Still deprecated
7411 * `rustdoc` and `cargo` are libraries now
7414 * Added a preliminary REPL, `rusti`
7415 * License changed from MIT to dual MIT/APL2
7418 Version 0.4 (2012-10-15)
7419 ==========================
7421 * ~2000 changes, numerous bugfixes
7424 * All keywords are now strict and may not be used as identifiers anywhere
7425 * Keyword removal: 'again', 'import', 'check', 'new', 'owned', 'send',
7426 'of', 'with', 'to', 'class'.
7427 * Classes are replaced with simpler structs
7428 * Explicit method self types
7429 * `ret` became `return` and `alt` became `match`
7430 * `import` is now `use`; `use is now `extern mod`
7431 * `extern mod { ... }` is now `extern { ... }`
7432 * `use mod` is the recommended way to import modules
7433 * `pub` and `priv` replace deprecated export lists
7434 * The syntax of `match` pattern arms now uses fat arrow (=>)
7435 * `main` no longer accepts an args vector; use `os::args` instead
7438 * Trait implementations are now coherent, ala Haskell typeclasses
7439 * Trait methods may be static
7440 * Argument modes are deprecated
7441 * Borrowed pointers are much more mature and recommended for use
7442 * Strings and vectors in the static region are stored in constant memory
7443 * Typestate was removed
7444 * Resolution rewritten to be more reliable
7445 * Support for 'dual-mode' data structures (freezing and thawing)
7448 * Most binary operators can now be overloaded via the traits in
7450 * `std::net::url` for representing URLs
7451 * Sendable hash maps in `core::send_map`
7452 * `core::task' gained a (currently unsafe) task-local storage API
7455 * An efficient new intertask communication primitive called the pipe,
7456 along with a number of higher-level channel types, in `core::pipes`
7457 * `std::arc`, an atomically reference counted, immutable, shared memory
7459 * `std::sync`, various exotic synchronization tools based on arcs and pipes
7460 * Futures are now based on pipes and sendable
7461 * More robust linked task failure
7462 * Improved task builder API
7465 * Improved error reporting
7466 * Preliminary JIT support
7467 * Preliminary work on precise GC
7468 * Extensive architectural improvements to rustc
7469 * Begun a transition away from buggy C++-based reflection (shape) code to
7470 Rust-based (visitor) code
7471 * All hash functions and tables converted to secure, randomized SipHash
7474 Version 0.3 (2012-07-12)
7475 ========================
7477 * ~1900 changes, numerous bugfixes
7479 * New coding conveniences
7480 * Integer-literal suffix inference
7481 * Per-item control over warnings, errors
7482 * #[cfg(windows)] and #[cfg(unix)] attributes
7483 * Documentation comments
7484 * More compact closure syntax
7485 * 'do' expressions for treating higher-order functions as
7487 * *-patterns (wildcard extended to all constructor fields)
7490 * Name resolution pass and exhaustiveness checker rewritten
7491 * Region pointers and borrow checking supersede alias
7493 * Init-ness checking is now provided by a region-based liveness
7494 pass instead of the typestate pass; same for last-use analysis
7495 * Extensive work on region pointers
7497 * Experimental new language features
7498 * Slices and fixed-size, interior-allocated vectors
7499 * #!-comments for lang versioning, shell execution
7500 * Destructors and iface implementation for classes;
7501 type-parameterized classes and class methods
7502 * 'const' type kind for types that can be used to implement
7503 shared-memory concurrency patterns
7507 * Removal of various obsolete features
7508 * Keywords: 'be', 'prove', 'syntax', 'note', 'mutable', 'bind',
7509 'crust', 'native' (now 'extern'), 'cont' (now 'again')
7511 * Constructs: do-while loops ('do' repurposed), fn binding,
7512 resources (replaced by destructors)
7514 * Compiler reorganization
7515 * Syntax-layer of compiler split into separate crate
7516 * Clang (from LLVM project) integrated into build
7517 * Typechecker split into sub-modules
7520 * New time functions
7521 * Extension methods for many built-in types
7522 * Arc: atomic-refcount read-only / exclusive-use shared cells
7523 * Par: parallel map and search routines
7524 * Extensive work on libuv interface
7525 * Much vector code moved to libraries
7526 * Syntax extensions: #line, #col, #file, #mod, #stringify,
7527 #include, #include_str, #include_bin
7530 * Cargo automatically resolves dependencies
7533 Version 0.2 (2012-03-29)
7534 =========================
7536 * >1500 changes, numerous bugfixes
7538 * New docs and doc tooling
7540 * New port: FreeBSD x86_64
7542 * Compilation model enhancements
7543 * Generics now specialized, multiply instantiated
7544 * Functions now inlined across separate crates
7546 * Scheduling, stack and threading fixes
7547 * Noticeably improved message-passing performance
7548 * Explicit schedulers
7552 * Experimental new language features
7553 * Operator overloading
7557 * Various language extensions
7558 * C-callback function types: 'crust fn ...'
7559 * Infinite-loop construct: 'loop { ... }'
7560 * Shorten 'mutable' to 'mut'
7561 * Required mutable-local qualifier: 'let mut ...'
7562 * Basic glob-exporting: 'export foo::*;'
7563 * Alt now exhaustive, 'alt check' for runtime-checked
7564 * Block-function form of 'for' loop, with 'break' and 'ret'.
7567 * AST quasi-quote syntax extension
7568 * Revived libuv interface
7569 * New modules: core::{future, iter}, std::arena
7570 * Merged per-platform std::{os*, fs*} to core::{libc, os}
7571 * Extensive cleanup, regularization in libstd, libcore
7574 Version 0.1 (2012-01-20)
7575 ===============================
7577 * Most language features work, including:
7578 * Unique pointers, unique closures, move semantics
7579 * Interface-constrained generics
7580 * Static interface dispatch
7582 * Multithread task scheduling
7583 * Typestate predicates
7584 * Failure unwinding, destructors
7585 * Pattern matching and destructuring assignment
7586 * Lightweight block-lambda syntax
7587 * Preliminary macro-by-example
7589 * Compiler works with the following configurations:
7590 * Linux: x86 and x86_64 hosts and targets
7591 * macOS: x86 and x86_64 hosts and targets
7592 * Windows: x86 hosts and targets
7594 * Cross compilation / multi-target configuration supported.
7596 * Preliminary API-documentation and package-management tools included.
7600 * Documentation is incomplete.
7602 * Performance is below intended target.
7604 * Standard library APIs are subject to extensive change, reorganization.
7606 * Language-level versioning is not yet operational - future code will