Updated RELEASES.md for 1.26.0
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Aaron Power
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RELEASES.md
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RELEASES.md
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Version 1.26.0 (2018-05-10)
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==========================
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Language
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--------
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- [Closures now implement `Copy` and/or `Clone` if all captured variables
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implement either or both traits.][49299]
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- [The inclusive range syntax e.g. `for x in 0..=10` is now stable.][47813]
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- [Stablise `'_`. The underscore lifetime can be used anywhere where a
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lifetime can be elided.][49458]
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- [`impl Trait` is now stable allowing you to have abstract
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return types.][49255] e.g. `fn foo() -> impl Iterator<Item=u8>` or
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`fn open(path: impl AsRef<Path>)`.
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- [Pattern matching will now automatically apply dereferences.][49394]
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- [128-bit integers in the form of `u128` and `i128` are now stable.][49101]
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- [`main` can now return `Result<(), E: Debug>`][49162] in addition to `()`.
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- [Fixed entry slice patterns are now stable.][48516] e.g.
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```rust
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let points = [1, 2, 3, 4];
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match points {
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[1, 2, 3, 4] => println!("All points were sequential."),
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_ => println!("Not all points were sequential."),
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}
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```
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Compiler
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--------
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- [LLD is now used as the default linker for `wasm32-unknown-unknown`.][48125]
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- [Fixed exponential projection complexity on nested types.][48296]
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This can provide up to a ~12% reduction in compile times for certain crates.
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- [Added the `--remap-path-prefix` option to rustc.][48359] Allowing you
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to remap path prefixes outputted by the compiler.
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- [Added `powerpc-unknown-netbsd` target.][48281]
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Libraries
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---------
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- [Implemented `From<u16> for usize` & `From<{u8, i16}> for isize`.][49305]
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- [Added hexadecimal formatting for integers with fmt::Debug][48978]
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e.g. `assert!(format!("{:02x?}", b"Foo\0") == "[46, 6f, 6f, 00]")`
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- [Implemented `Default, Hash` for `cmp::Reverse`.][48628]
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- [Optimized `str::repeat` being 8x faster in large cases.][48657]
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- [`ascii::escape_default` is now available in libcore.][48735]
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- [Implemented `FromStr` for `PathBuf`][48292]
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- [Trailing commas are now supported in std and core macros.][48056]
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- [Implemented `Copy, Clone` for `cmp::Reverse`][47379]
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- [Implemented `Clone` for `char::{ToLowercase, ToUppercase}`.][48629]
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Stabilized APIs
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---------------
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- [`*const T::add`]
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- [`*const T::copy_to_nonoverlapping`]
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- [`*const T::copy_to`]
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- [`*const T::read_unaligned`]
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- [`*const T::read_volatile`]
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- [`*const T::read`]
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- [`*const T::sub`]
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- [`*const T::wrapping_add`]
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- [`*const T::wrapping_sub`]
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- [`*mut T::add`]
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- [`*mut T::copy_to_nonoverlapping`]
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- [`*mut T::copy_to`]
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- [`*mut T::read_unaligned`]
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- [`*mut T::read_volatile`]
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- [`*mut T::read`]
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- [`*mut T::replace`]
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- [`*mut T::sub`]
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- [`*mut T::swap`]
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- [`*mut T::wrapping_add`]
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- [`*mut T::wrapping_sub`]
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- [`*mut T::write_bytes`]
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- [`*mut T::write_unaligned`]
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- [`*mut T::write_volatile`]
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- [`*mut T::write`]
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- [`Box::leak`]
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- [`FromUtf8Error::as_bytes`]
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- [`LocalKey::try_with`]
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- [`Option::cloned`]
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- [`btree_map::Entry::and_modify`]
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- [`convert::TryFrom`]
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- [`convert::TryInto`]
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- [`fs::read_to_string`]
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- [`fs::read`]
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- [`fs::write`]
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- [`hash_map::Entry::and_modify`]
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- [`iter::FusedIterator`]
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- [`ops::RangeInclusive`]
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- [`ops::RangeToInclusive`]
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- [`process::id`]
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- [`slice::rotate_left`]
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- [`slice::rotate_right`]
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- [`String::retain`]
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Cargo
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-----
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- [Cargo will now output path to custom commands when `-v` is
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passed with `--list`][cargo/5041]
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- [The Cargo binary version is now the same as the Rust version][cargo/5083]
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- [`Cargo.lock` files are now included in published crates.][cargo/5093]
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Misc
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----
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- [The second edition of "The Rust Programming Language" book is now recommended
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over the first.][48404]
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Compatibility Notes
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-------------------
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- [aliasing a `Fn` trait as `dyn` no longer works.][48481] E.g. the following
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syntax is now invalid.
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```
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use std::ops::Fn as dyn;
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fn g(_: Box<dyn(std::fmt::Debug)>) {}
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```
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- [The result of dereferences are no longer promoted to `'static`.][47408]
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e.g.
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```rust
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fn main() {
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const PAIR: &(i32, i32) = &(0, 1);
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let _reversed_pair: &'static _ = &(PAIR.1, PAIR.0); // Doesn't work
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}
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```
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- [Removed the deprecated unstable `SipHasher{13,24}` from documentation.][49108]
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- [Deprecate `AsciiExt` trait in favor of inherent methods.][49109]
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- [`".e0"` will now no longer parse as `0.0` and will instead cause
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an error.][48235]
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- [Removed hoedown from rustdoc.][48274]
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[47379]: https://github.com/rust-lang/rust/pull/47379
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[47408]: https://github.com/rust-lang/rust/pull/47408
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[47813]: https://github.com/rust-lang/rust/pull/47813
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[48056]: https://github.com/rust-lang/rust/pull/48056
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[48125]: https://github.com/rust-lang/rust/pull/48125
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[48166]: https://github.com/rust-lang/rust/pull/48166
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[48235]: https://github.com/rust-lang/rust/pull/48235
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[48274]: https://github.com/rust-lang/rust/pull/48274
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[48281]: https://github.com/rust-lang/rust/pull/48281
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[48292]: https://github.com/rust-lang/rust/pull/48292
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[48296]: https://github.com/rust-lang/rust/pull/48296
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[48359]: https://github.com/rust-lang/rust/pull/48359
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[48404]: https://github.com/rust-lang/rust/pull/48404
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[48481]: https://github.com/rust-lang/rust/pull/48481
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[48516]: https://github.com/rust-lang/rust/pull/48516
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[48628]: https://github.com/rust-lang/rust/pull/48628
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[48629]: https://github.com/rust-lang/rust/pull/48629
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[48657]: https://github.com/rust-lang/rust/pull/48657
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[48735]: https://github.com/rust-lang/rust/pull/48735
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[48978]: https://github.com/rust-lang/rust/pull/48978
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[49101]: https://github.com/rust-lang/rust/pull/49101
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[49108]: https://github.com/rust-lang/rust/pull/49108
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[49109]: https://github.com/rust-lang/rust/pull/49109
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[49121]: https://github.com/rust-lang/rust/pull/49121
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[49162]: https://github.com/rust-lang/rust/pull/49162
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[49184]: https://github.com/rust-lang/rust/pull/49184
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[49234]: https://github.com/rust-lang/rust/pull/49234
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[49255]: https://github.com/rust-lang/rust/pull/49255
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[49299]: https://github.com/rust-lang/rust/pull/49299
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[49305]: https://github.com/rust-lang/rust/pull/49305
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[49394]: https://github.com/rust-lang/rust/pull/49394
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[49458]: https://github.com/rust-lang/rust/pull/49458
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[`*const T::add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.add
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[`*const T::copy_to_nonoverlapping`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to_nonoverlapping
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[`*const T::copy_to`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to
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[`*const T::read_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_unaligned
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[`*const T::read_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_volatile
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[`*const T::read`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read
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[`*const T::sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.sub
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[`*const T::wrapping_add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_add
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[`*const T::wrapping_sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_sub
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[`*mut T::add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.add-1
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[`*mut T::copy_to_nonoverlapping`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to_nonoverlapping-1
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[`*mut T::copy_to`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.copy_to-1
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[`*mut T::read_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_unaligned-1
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[`*mut T::read_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read_volatile-1
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[`*mut T::read`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.read-1
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[`*mut T::replace`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.replace
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[`*mut T::sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.sub-1
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[`*mut T::swap`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.swap
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[`*mut T::wrapping_add`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_add-1
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[`*mut T::wrapping_sub`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.wrapping_sub-1
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[`*mut T::write_bytes`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_bytes
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[`*mut T::write_unaligned`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_unaligned
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[`*mut T::write_volatile`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write_volatile
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[`*mut T::write`]: https://doc.rust-lang.org/std/primitive.pointer.html#method.write
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[`Box::leak`]: https://doc.rust-lang.org/std/boxed/struct.Box.html#method.leak
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[`FromUtf8Error::as_bytes`]: https://doc.rust-lang.org/std/string/struct.FromUtf8Error.html#method.as_bytes
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[`LocalKey::try_with`]: https://doc.rust-lang.org/std/thread/struct.LocalKey.html#method.try_with
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[`Option::cloned`]: https://doc.rust-lang.org/std/option/enum.Option.html#method.cloned
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[`btree_map::Entry::and_modify`]: https://doc.rust-lang.org/std/collections/btree_map/enum.Entry.html#method.and_modify
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[`convert::TryFrom`]: https://doc.rust-lang.org/std/convert/trait.TryFrom.html
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[`convert::TryInto`]: https://doc.rust-lang.org/std/convert/trait.TryInto.html
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[`fs::read_to_string`]: https://doc.rust-lang.org/std/fs/fn.read_to_string.html
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[`fs::read`]: https://doc.rust-lang.org/std/fs/fn.read.html
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[`fs::write`]: https://doc.rust-lang.org/std/fs/fn.write.html
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[`hash_map::Entry::and_modify`]: https://doc.rust-lang.org/std/collections/hash_map/enum.Entry.html#method.and_modify
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[`iter::FusedIterator`]: https://doc.rust-lang.org/std/iter/trait.FusedIterator.html
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[`ops::RangeInclusive`]: https://doc.rust-lang.org/std/ops/struct.RangeInclusive.html
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[`ops::RangeToInclusive`]: https://doc.rust-lang.org/std/ops/struct.RangeToInclusive.html
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[`process::id`]: https://doc.rust-lang.org/std/process/fn.id.html
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[`slice::rotate_left`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rotate_left
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[`slice::rotate_right`]: https://doc.rust-lang.org/std/primitive.slice.html#method.rotate_right
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[`String::retain`]: https://doc.rust-lang.org/std/string/struct.String.html#method.retain
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[cargo/5041]: https://github.com/rust-lang/cargo/pull/5041
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[cargo/5083]: https://github.com/rust-lang/cargo/pull/5083
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[cargo/5093]: https://github.com/rust-lang/cargo/pull/5093
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Version 1.25.0 (2018-03-29)
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==========================
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