Version 1.15.1 (2017-02-08) =========================== * [Fix IntoIter::as_mut_slice's signature][39466] [39466]: https://github.com/rust-lang/rust/pull/39466 Version 1.15.0 (2017-02-02) =========================== Language -------- * Basic procedural macros allowing custom `#[derive]`, aka "macros 1.1", are stable. This allows popular code-generating crates like Serde and Diesel to work ergonomically. [RFC 1681]. * [Tuple structs may be empty. Unary and empty tuple structs may be instantiated with curly braces][36868]. Part of [RFC 1506]. * [A number of minor changes to name resolution have been activated][37127]. They add up to more consistent semantics, allowing for future evolution of Rust macros. Specified in [RFC 1560], see its section on ["changes"] for details of what is different. The breaking changes here have been transitioned through the [`legacy_imports`] lint since 1.14, with no known regressions. * [In `macro_rules`, `path` fragments can now be parsed as type parameter bounds][38279] * [`?Sized` can be used in `where` clauses][37791] * [There is now a limit on the size of monomorphized types and it can be modified with the `#![type_size_limit]` crate attribute, similarly to the `#![recursion_limit]` attribute][37789] Compiler -------- * [On Windows, the compiler will apply dllimport attributes when linking to extern functions][37973]. Additional attributes and flags can control which library kind is linked and its name. [RFC 1717]. * [Rust-ABI symbols are no longer exported from cdylibs][38117] * [The `--test` flag works with procedural macro crates][38107] * [Fix `extern "aapcs" fn` ABI][37814] * [The `-C no-stack-check` flag is deprecated][37636]. It does nothing. * [The `format!` expander recognizes incorrect `printf` and shell-style formatting directives and suggests the correct format][37613]. * [Only report one error for all unused imports in an import list][37456] Compiler Performance -------------------- * [Avoid unnecessary `mk_ty` calls in `Ty::super_fold_with`][37705] * [Avoid more unnecessary `mk_ty` calls in `Ty::super_fold_with`][37979] * [Don't clone in `UnificationTable::probe`][37848] * [Remove `scope_auxiliary` to cut RSS by 10%][37764] * [Use small vectors in type walker][37760] * [Macro expansion performance was improved][37701] * [Change `HirVec>` to `HirVec` in `hir::Expr`][37642] * [Replace FNV with a faster hash function][37229] Stabilized APIs --------------- * [`std::iter::Iterator::min_by`] * [`std::iter::Iterator::max_by`] * [`std::os::*::fs::FileExt`] * [`std::sync::atomic::Atomic*::get_mut`] * [`std::sync::atomic::Atomic*::into_inner`] * [`std::vec::IntoIter::as_slice`] * [`std::vec::IntoIter::as_mut_slice`] * [`std::sync::mpsc::Receiver::try_iter`] * [`std::os::unix::process::CommandExt::before_exec`] * [`std::rc::Rc::strong_count`] * [`std::rc::Rc::weak_count`] * [`std::sync::Arc::strong_count`] * [`std::sync::Arc::weak_count`] * [`std::char::encode_utf8`] * [`std::char::encode_utf16`] * [`std::cell::Ref::clone`] * [`std::io::Take::into_inner`] Libraries --------- * [The standard sorting algorithm has been rewritten for dramatic performance improvements][38192]. It is a hybrid merge sort, drawing influences from Timsort. Previously it was a naive merge sort. * [`Iterator::nth` no longer has a `Sized` bound][38134] * [`Extend<&T>` is specialized for `Vec` where `T: Copy`][38182] to improve performance. * [`chars().count()` is much faster][37888] and so are [`chars().last()` and `char_indices().last()`][37882] * [Fix ARM Objective-C ABI in `std::env::args`][38146] * [Chinese characters display correctly in `fmt::Debug`][37855] * [Derive `Default` for `Duration`][37699] * [Support creation of anonymous pipes on WinXP/2k][37677] * [`mpsc::RecvTimeoutError` implements `Error`][37527] * [Don't pass overlapped handles to processes][38835] Cargo ----- * [In this release, Cargo build scripts no longer have access to the `OUT_DIR` environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They should instead check the variable at runtime with `std::env`. That the value was set at build time was a bug, and incorrect when cross-compiling. This change is known to cause breakage. * [Add `--all` flag to `cargo test`][cargo/3221] * [Compile statically against the MSVC CRT][cargo/3363] * [Mix feature flags into fingerprint/metadata shorthash][cargo/3102] * [Link OpenSSL statically on OSX][cargo/3311] * [Apply new fingerprinting to build dir outputs][cargo/3310] * [Test for bad path overrides with summaries][cargo/3336] * [Require `cargo install --vers` to take a semver version][cargo/3338] * [Fix retrying crate downloads for network errors][cargo/3348] * [Implement string lookup for `build.rustflags` config key][cargo/3356] * [Emit more info on --message-format=json][cargo/3319] * [Assume `build.rs` in the same directory as `Cargo.toml` is a build script][cargo/3361] * [Don't ignore errors in workspace manifest][cargo/3409] * [Fix `--message-format JSON` when rustc emits non-JSON warnings][cargo/3410] Tooling ------- * [Test runners (binaries built with `--test`) now support a `--list` argument that lists the tests it contains][38185] * [Test runners now support a `--exact` argument that makes the test filter match exactly, instead of matching only a substring of the test name][38181] * [rustdoc supports a `--playground-url` flag][37763] * [rustdoc provides more details about `#[should_panic]` errors][37749] Misc ---- * [The Rust build system is now written in Rust][37817]. The Makefiles may continue to be used in this release by passing `--disable-rustbuild` to the configure script, but they will be deleted soon. Note that the new build system uses a different on-disk layout that will likely affect any scripts building Rust. * [Rust supports i686-unknown-openbsd][38086]. Tier 3 support. No testing or releases. * [Rust supports the MSP430][37627]. Tier 3 support. No testing or releases. * [Rust supports the ARMv5TE architecture][37615]. Tier 3 support. No testing or releases. Compatibility Notes ------------------- * [A number of minor changes to name resolution have been activated][37127]. They add up to more consistent semantics, allowing for future evolution of Rust macros. Specified in [RFC 1560], see its section on ["changes"] for details of what is different. The breaking changes here have been transitioned through the [`legacy_imports`] lint since 1.14, with no known regressions. * [In this release, Cargo build scripts no longer have access to the `OUT_DIR` environment variable at build time via `env!("OUT_DIR")`][cargo/3368]. They should instead check the variable at runtime with `std::env`. That the value was set at build time was a bug, and incorrect when cross-compiling. This change is known to cause breakage. * [Higher-ranked lifetimes are no longer allowed to appear _only_ in associated types][33685]. The [`hr_lifetime_in_assoc_type` lint] has been a warning since 1.10 and is now an error by default. It will become a hard error in the near future. * [The semantics relating modules to file system directories are changing in minor ways][37602]. This is captured in the new `legacy_directory_ownership` lint, which is a warning in this release, and will become a hard error in the future. * [Rust-ABI symbols are no longer exported from cdylibs][38117] * [Once `Peekable` peeks a `None` it will return that `None` without re-querying the underlying iterator][37834] ["changes"]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md#changes-to-name-resolution-rules [33685]: https://github.com/rust-lang/rust/issues/33685 [36868]: https://github.com/rust-lang/rust/pull/36868 [37127]: https://github.com/rust-lang/rust/pull/37127 [37229]: https://github.com/rust-lang/rust/pull/37229 [37456]: https://github.com/rust-lang/rust/pull/37456 [37527]: https://github.com/rust-lang/rust/pull/37527 [37602]: https://github.com/rust-lang/rust/pull/37602 [37613]: https://github.com/rust-lang/rust/pull/37613 [37615]: https://github.com/rust-lang/rust/pull/37615 [37636]: https://github.com/rust-lang/rust/pull/37636 [37627]: https://github.com/rust-lang/rust/pull/37627 [37642]: https://github.com/rust-lang/rust/pull/37642 [37677]: https://github.com/rust-lang/rust/pull/37677 [37699]: https://github.com/rust-lang/rust/pull/37699 [37701]: https://github.com/rust-lang/rust/pull/37701 [37705]: https://github.com/rust-lang/rust/pull/37705 [37749]: https://github.com/rust-lang/rust/pull/37749 [37760]: https://github.com/rust-lang/rust/pull/37760 [37763]: https://github.com/rust-lang/rust/pull/37763 [37764]: https://github.com/rust-lang/rust/pull/37764 [37789]: https://github.com/rust-lang/rust/pull/37789 [37791]: https://github.com/rust-lang/rust/pull/37791 [37814]: https://github.com/rust-lang/rust/pull/37814 [37817]: https://github.com/rust-lang/rust/pull/37817 [37834]: https://github.com/rust-lang/rust/pull/37834 [37848]: https://github.com/rust-lang/rust/pull/37848 [37855]: https://github.com/rust-lang/rust/pull/37855 [37882]: https://github.com/rust-lang/rust/pull/37882 [37888]: https://github.com/rust-lang/rust/pull/37888 [37973]: https://github.com/rust-lang/rust/pull/37973 [37979]: https://github.com/rust-lang/rust/pull/37979 [38086]: https://github.com/rust-lang/rust/pull/38086 [38107]: https://github.com/rust-lang/rust/pull/38107 [38117]: https://github.com/rust-lang/rust/pull/38117 [38134]: https://github.com/rust-lang/rust/pull/38134 [38146]: https://github.com/rust-lang/rust/pull/38146 [38181]: https://github.com/rust-lang/rust/pull/38181 [38182]: https://github.com/rust-lang/rust/pull/38182 [38185]: https://github.com/rust-lang/rust/pull/38185 [38192]: https://github.com/rust-lang/rust/pull/38192 [38279]: https://github.com/rust-lang/rust/pull/38279 [38835]: https://github.com/rust-lang/rust/pull/38835 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md [RFC 1560]: https://github.com/rust-lang/rfcs/blob/master/text/1560-name-resolution.md [RFC 1681]: https://github.com/rust-lang/rfcs/blob/master/text/1681-macros-1.1.md [RFC 1717]: https://github.com/rust-lang/rfcs/blob/master/text/1717-dllimport.md [`hr_lifetime_in_assoc_type` lint]: https://github.com/rust-lang/rust/issues/33685 [`legacy_imports`]: https://github.com/rust-lang/rust/pull/38271 [cargo/3102]: https://github.com/rust-lang/cargo/pull/3102 [cargo/3221]: https://github.com/rust-lang/cargo/pull/3221 [cargo/3310]: https://github.com/rust-lang/cargo/pull/3310 [cargo/3311]: https://github.com/rust-lang/cargo/pull/3311 [cargo/3319]: https://github.com/rust-lang/cargo/pull/3319 [cargo/3336]: https://github.com/rust-lang/cargo/pull/3336 [cargo/3338]: https://github.com/rust-lang/cargo/pull/3338 [cargo/3348]: https://github.com/rust-lang/cargo/pull/3348 [cargo/3356]: https://github.com/rust-lang/cargo/pull/3356 [cargo/3361]: https://github.com/rust-lang/cargo/pull/3361 [cargo/3363]: https://github.com/rust-lang/cargo/pull/3363 [cargo/3368]: https://github.com/rust-lang/cargo/issues/3368 [cargo/3409]: https://github.com/rust-lang/cargo/pull/3409 [cargo/3410]: https://github.com/rust-lang/cargo/pull/3410 [`std::iter::Iterator::min_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.min_by [`std::iter::Iterator::max_by`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.max_by [`std::os::*::fs::FileExt`]: https://doc.rust-lang.org/std/os/unix/fs/trait.FileExt.html [`std::sync::atomic::Atomic*::get_mut`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.get_mut [`std::sync::atomic::Atomic*::into_inner`]: https://doc.rust-lang.org/std/sync/atomic/struct.AtomicU8.html#method.into_inner [`std::vec::IntoIter::as_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_slice [`std::vec::IntoIter::as_mut_slice`]: https://doc.rust-lang.org/std/vec/struct.IntoIter.html#method.as_mut_slice [`std::sync::mpsc::Receiver::try_iter`]: https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.try_iter [`std::os::unix::process::CommandExt::before_exec`]: https://doc.rust-lang.org/std/os/unix/process/trait.CommandExt.html#tymethod.before_exec [`std::rc::Rc::strong_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.strong_count [`std::rc::Rc::weak_count`]: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.weak_count [`std::sync::Arc::strong_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.strong_count [`std::sync::Arc::weak_count`]: https://doc.rust-lang.org/std/sync/struct.Arc.html#method.weak_count [`std::char::encode_utf8`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf8 [`std::char::encode_utf16`]: https://doc.rust-lang.org/std/primitive.char.html#method.encode_utf16 [`std::cell::Ref::clone`]: https://doc.rust-lang.org/std/cell/struct.Ref.html#method.clone [`std::io::Take::into_inner`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.into_inner Version 1.14.0 (2016-12-22) =========================== Language -------- * [`..` matches multiple tuple fields in enum variants, structs and tuples][36843]. [RFC 1492]. * [Safe `fn` items can be coerced to `unsafe fn` pointers][37389] * [`use *` and `use ::*` both glob-import from the crate root][37367] * [It's now possible to call a `Vec>` without explicit dereferencing][36822] Compiler -------- * [Mark enums with non-zero discriminant as non-zero][37224] * [Lower-case `static mut` names are linted like other statics and consts][37162] * [Fix ICE on some macros in const integer positions (e.g. `[u8; m!()]`)][36819] * [Improve error message and snippet for "did you mean `x`"][36798] * [Add a panic-strategy field to the target specification][36794] * [Include LLVM version in `--version --verbose`][37200] Compile-time Optimizations -------------------------- * [Improve macro expansion performance][37569] * [Shrink `Expr_::ExprInlineAsm`][37445] * [Replace all uses of SHA-256 with BLAKE2b][37439] * [Reduce the number of bytes hashed by `IchHasher`][37427] * [Avoid more allocations when compiling html5ever][37373] * [Use `SmallVector` in `CombineFields::instantiate`][37322] * [Avoid some allocations in the macro parser][37318] * [Use a faster deflate setting][37298] * [Add `ArrayVec` and `AccumulateVec` to reduce heap allocations during interning of slices][37270] * [Optimize `write_metadata`][37267] * [Don't process obligation forest cycles when stalled][37231] * [Avoid many `CrateConfig` clones][37161] * [Optimize `Substs::super_fold_with`][37108] * [Optimize `ObligationForest`'s `NodeState` handling][36993] * [Speed up `plug_leaks`][36917] Libraries --------- * [`println!()`, with no arguments, prints newline][36825]. Previously, an empty string was required to achieve the same. * [`Wrapping` impls standard binary and unary operators, as well as the `Sum` and `Product` iterators][37356] * [Implement `From> for String` and `From> for Vec`][37326] * [Improve `fold` performance for `chain`, `cloned`, `map`, and `VecDeque` iterators][37315] * [Improve `SipHasher` performance on small values][37312] * [Add Iterator trait TrustedLen to enable better FromIterator / Extend][37306] * [Expand `.zip()` specialization to `.map()` and `.cloned()`][37230] * [`ReadDir` implements `Debug`][37221] * [Implement `RefUnwindSafe` for atomic types][37178] * [Specialize `Vec::extend` to `Vec::extend_from_slice`][37094] * [Avoid allocations in `Decoder::read_str`][37064] * [`io::Error` implements `From`][37037] * [Impl `Debug` for raw pointers to unsized data][36880] * [Don't reuse `HashMap` random seeds][37470] * [The internal memory layout of `HashMap` is more cache-friendly, for significant improvements in some operations][36692] * [`HashMap` uses less memory on 32-bit architectures][36595] * [Impl `Add<{str, Cow}>` for `Cow`][36430] Cargo ----- * [Expose rustc cfg values to build scripts][cargo/3243] * [Allow cargo to work with read-only `CARGO_HOME`][cargo/3259] * [Fix passing --features when testing multiple packages][cargo/3280] * [Use a single profile set per workspace][cargo/3249] * [Load `replace` sections from lock files][cargo/3220] * [Ignore `panic` configuration for test/bench profiles][cargo/3175] Tooling ------- * [rustup is the recommended Rust installation method][1.14rustup] * This release includes host (rustc) builds for Linux on MIPS, PowerPC, and S390x. These are [tier 2] platforms and may have major defects. Follow the instructions on the website to install, or add the targets to an existing installation with `rustup target add`. The new target triples are: - `mips-unknown-linux-gnu` - `mipsel-unknown-linux-gnu` - `mips64-unknown-linux-gnuabi64` - `mips64el-unknown-linux-gnuabi64 ` - `powerpc-unknown-linux-gnu` - `powerpc64-unknown-linux-gnu` - `powerpc64le-unknown-linux-gnu` - `s390x-unknown-linux-gnu ` * This release includes target (std) builds for ARM Linux running MUSL libc. These are [tier 2] platforms and may have major defects. Add the following triples to an existing rustup installation with `rustup target add`: - `arm-unknown-linux-musleabi` - `arm-unknown-linux-musleabihf` - `armv7-unknown-linux-musleabihf` * This release includes [experimental support for WebAssembly][1.14wasm], via the `wasm32-unknown-emscripten` target. This target is known to have major defects. Please test, report, and fix. * rustup no longer installs documentation by default. Run `rustup component add rust-docs` to install. * [Fix line stepping in debugger][37310] * [Enable line number debuginfo in releases][37280] Misc ---- * [Disable jemalloc on aarch64/powerpc/mips][37392] * [Add support for Fuchsia OS][37313] * [Detect local-rebuild by only MAJOR.MINOR version][37273] Compatibility Notes ------------------- * [A number of forward-compatibility lints used by the compiler to gradually introduce language changes have been converted to deny by default][36894]: - ["use of inaccessible extern crate erroneously allowed"][36886] - ["type parameter default erroneously allowed in invalid location"][36887] - ["detects super or self keywords at the beginning of global path"][36888] - ["two overlapping inherent impls define an item with the same name were erroneously allowed"][36889] - ["floating-point constants cannot be used in patterns"][36890] - ["constants of struct or enum type can only be used in a pattern if the struct or enum has `#[derive(PartialEq, Eq)]`"][36891] - ["lifetimes or labels named `'_` were erroneously allowed"][36892] * [Prohibit patterns in trait methods without bodies][37378] * [The atomic `Ordering` enum may not be matched exhaustively][37351] * [Future-proofing `#[no_link]` breaks some obscure cases][37247] * [The `$crate` macro variable is accepted in fewer locations][37213] * [Impls specifying extra region requirements beyond the trait they implement are rejected][37167] * [Enums may not be unsized][37111]. Unsized enums are intended to work but never have. For now they are forbidden. * [Enforce the shadowing restrictions from RFC 1560 for today's macros][36767] [tier 2]: https://forge.rust-lang.org/platform-support.html [1.14rustup]: https://internals.rust-lang.org/t/beta-testing-rustup-rs/3316/204 [1.14wasm]: https://users.rust-lang.org/t/compiling-to-the-web-with-rust-and-emscripten/7627 [36430]: https://github.com/rust-lang/rust/pull/36430 [36595]: https://github.com/rust-lang/rust/pull/36595 [36595]: https://github.com/rust-lang/rust/pull/36595 [36692]: https://github.com/rust-lang/rust/pull/36692 [36767]: https://github.com/rust-lang/rust/pull/36767 [36794]: https://github.com/rust-lang/rust/pull/36794 [36798]: https://github.com/rust-lang/rust/pull/36798 [36819]: https://github.com/rust-lang/rust/pull/36819 [36822]: https://github.com/rust-lang/rust/pull/36822 [36825]: https://github.com/rust-lang/rust/pull/36825 [36843]: https://github.com/rust-lang/rust/pull/36843 [36880]: https://github.com/rust-lang/rust/pull/36880 [36886]: https://github.com/rust-lang/rust/issues/36886 [36887]: https://github.com/rust-lang/rust/issues/36887 [36888]: https://github.com/rust-lang/rust/issues/36888 [36889]: https://github.com/rust-lang/rust/issues/36889 [36890]: https://github.com/rust-lang/rust/issues/36890 [36891]: https://github.com/rust-lang/rust/issues/36891 [36892]: https://github.com/rust-lang/rust/issues/36892 [36894]: https://github.com/rust-lang/rust/pull/36894 [36917]: https://github.com/rust-lang/rust/pull/36917 [36993]: https://github.com/rust-lang/rust/pull/36993 [37037]: https://github.com/rust-lang/rust/pull/37037 [37064]: https://github.com/rust-lang/rust/pull/37064 [37094]: https://github.com/rust-lang/rust/pull/37094 [37108]: https://github.com/rust-lang/rust/pull/37108 [37111]: https://github.com/rust-lang/rust/pull/37111 [37161]: https://github.com/rust-lang/rust/pull/37161 [37162]: https://github.com/rust-lang/rust/pull/37162 [37167]: https://github.com/rust-lang/rust/pull/37167 [37178]: https://github.com/rust-lang/rust/pull/37178 [37200]: https://github.com/rust-lang/rust/pull/37200 [37213]: https://github.com/rust-lang/rust/pull/37213 [37221]: https://github.com/rust-lang/rust/pull/37221 [37224]: https://github.com/rust-lang/rust/pull/37224 [37230]: https://github.com/rust-lang/rust/pull/37230 [37231]: https://github.com/rust-lang/rust/pull/37231 [37247]: https://github.com/rust-lang/rust/pull/37247 [37267]: https://github.com/rust-lang/rust/pull/37267 [37270]: https://github.com/rust-lang/rust/pull/37270 [37273]: https://github.com/rust-lang/rust/pull/37273 [37280]: https://github.com/rust-lang/rust/pull/37280 [37298]: https://github.com/rust-lang/rust/pull/37298 [37306]: https://github.com/rust-lang/rust/pull/37306 [37310]: https://github.com/rust-lang/rust/pull/37310 [37312]: https://github.com/rust-lang/rust/pull/37312 [37313]: https://github.com/rust-lang/rust/pull/37313 [37315]: https://github.com/rust-lang/rust/pull/37315 [37318]: https://github.com/rust-lang/rust/pull/37318 [37322]: https://github.com/rust-lang/rust/pull/37322 [37326]: https://github.com/rust-lang/rust/pull/37326 [37351]: https://github.com/rust-lang/rust/pull/37351 [37356]: https://github.com/rust-lang/rust/pull/37356 [37367]: https://github.com/rust-lang/rust/pull/37367 [37373]: https://github.com/rust-lang/rust/pull/37373 [37378]: https://github.com/rust-lang/rust/pull/37378 [37389]: https://github.com/rust-lang/rust/pull/37389 [37392]: https://github.com/rust-lang/rust/pull/37392 [37427]: https://github.com/rust-lang/rust/pull/37427 [37439]: https://github.com/rust-lang/rust/pull/37439 [37445]: https://github.com/rust-lang/rust/pull/37445 [37470]: https://github.com/rust-lang/rust/pull/37470 [37569]: https://github.com/rust-lang/rust/pull/37569 [RFC 1492]: https://github.com/rust-lang/rfcs/blob/master/text/1492-dotdot-in-patterns.md [cargo/3175]: https://github.com/rust-lang/cargo/pull/3175 [cargo/3220]: https://github.com/rust-lang/cargo/pull/3220 [cargo/3243]: https://github.com/rust-lang/cargo/pull/3243 [cargo/3249]: https://github.com/rust-lang/cargo/pull/3249 [cargo/3259]: https://github.com/rust-lang/cargo/pull/3259 [cargo/3280]: https://github.com/rust-lang/cargo/pull/3280 Version 1.13.0 (2016-11-10) =========================== Language -------- * [Stabilize the `?` operator][36995]. `?` is a simple way to propagate errors, like the `try!` macro, described in [RFC 0243]. * [Stabilize macros in type position][36014]. Described in [RFC 873]. * [Stabilize attributes on statements][36995]. Described in [RFC 0016]. * [Fix `#[derive]` for empty tuple structs/variants][35728] * [Fix lifetime rules for 'if' conditions][36029] * [Avoid loading and parsing unconfigured non-inline modules][36482] Compiler -------- * [Add the `-C link-arg` argument][36574] * [Remove the old AST-based backend from rustc_trans][35764] * [Don't enable NEON by default on armv7 Linux][35814] * [Fix debug line number info for macro expansions][35238] * [Do not emit "class method" debuginfo for types that are not DICompositeType][36008] * [Warn about multiple conflicting #[repr] hints][34623] * [When sizing DST, don't double-count nested struct prefixes][36351] * [Default RUST_MIN_STACK to 16MiB for now][36505] * [Improve rlib metadata format][36551]. Reduces rlib size significantly. * [Reject macros with empty repetitions to avoid infinite loop][36721] * [Expand macros without recursing to avoid stack overflows][36214] Diagnostics ----------- * [Replace macro backtraces with labeled local uses][35702] * [Improve error message for missplaced doc comments][33922] * [Buffer unix and lock windows to prevent message interleaving][35975] * [Update lifetime errors to specifically note temporaries][36171] * [Special case a few colors for Windows][36178] * [Suggest `use self` when such an import resolves][36289] * [Be more specific when type parameter shadows primitive type][36338] * Many minor improvements Compile-time Optimizations -------------------------- * [Compute and cache HIR hashes at beginning][35854] * [Don't hash types in loan paths][36004] * [Cache projections in trans][35761] * [Optimize the parser's last token handling][36527] * [Only instantiate #[inline] functions in codegen units referencing them][36524]. This leads to big improvements in cases where crates export define many inline functions without using them directly. * [Lazily allocate TypedArena's first chunk][36592] * [Don't allocate during default HashSet creation][36734] Stabilized APIs --------------- * [`checked_abs`] * [`wrapping_abs`] * [`overflowing_abs`] * [`RefCell::try_borrow`] * [`RefCell::try_borrow_mut`] Libraries --------- * [Add `assert_ne!` and `debug_assert_ne!`][35074] * [Make `vec_deque::Drain`, `hash_map::Drain`, and `hash_set::Drain` covariant][35354] * [Implement `AsRef<[T]>` for `std::slice::Iter`][35559] * [Implement `Debug` for `std::vec::IntoIter`][35707] * [`CString`: avoid excessive growth just to 0-terminate][35871] * [Implement `CoerceUnsized` for `{Cell, RefCell, UnsafeCell}`][35627] * [Use arc4rand on FreeBSD][35884] * [memrchr: Correct aligned offset computation][35969] * [Improve Demangling of Rust Symbols][36059] * [Use monotonic time in condition variables][35048] * [Implement `Debug` for `std::path::{Components,Iter}`][36101] * [Implement conversion traits for `char`][35755] * [Fix illegal instruction caused by overflow in channel cloning][36104] * [Zero first byte of CString on drop][36264] * [Inherit overflow checks for sum and product][36372] * [Add missing Eq implementations][36423] * [Implement `Debug` for `DirEntry`][36631] * [When `getaddrinfo` returns `EAI_SYSTEM` retrieve actual error from `errno`][36754] * [`SipHasher`] is deprecated. Use [`DefaultHasher`]. * [Implement more traits for `std::io::ErrorKind`][35911] * [Optimize BinaryHeap bounds checking][36072] * [Work around pointer aliasing issue in `Vec::extend_from_slice`, `extend_with_element`][36355] * [Fix overflow checking in unsigned pow()][34942] Cargo ----- * This release includes security fixes to both curl and OpenSSL. * [Fix transitive doctests when panic=abort][cargo/3021] * [Add --all-features flag to cargo][cargo/3038] * [Reject path-based dependencies in `cargo package`][cargo/3060] * [Don't parse the home directory more than once][cargo/3078] * [Don't try to generate Cargo.lock on empty workspaces][cargo/3092] * [Update OpenSSL to 1.0.2j][cargo/3121] * [Add license and license_file to cargo metadata output][cargo/3110] * [Make crates-io registry URL optional in config; ignore all changes to source.crates-io][cargo/3089] * [Don't download dependencies from other platforms][cargo/3123] * [Build transitive dev-dependencies when needed][cargo/3125] * [Add support for per-target rustflags in .cargo/config][cargo/3157] * [Avoid updating registry when adding existing deps][cargo/3144] * [Warn about path overrides that won't work][cargo/3136] * [Use workspaces during `cargo install`][cargo/3146] * [Leak mspdbsrv.exe processes on Windows][cargo/3162] * [Add --message-format flag][cargo/3000] * [Pass target environment for rustdoc][cargo/3205] * [Use `CommandExt::exec` for `cargo run` on Unix][cargo/2818] * [Update curl and curl-sys][cargo/3241] * [Call rustdoc test with the correct cfg flags of a package][cargo/3242] Tooling ------- * [rustdoc: Add the `--sysroot` argument][36586] * [rustdoc: Fix a couple of issues with the search results][35655] * [rustdoc: remove the `!` from macro URLs and titles][35234] * [gdb: Fix pretty-printing special-cased Rust types][35585] * [rustdoc: Filter more incorrect methods inherited through Deref][36266] Misc ---- * [Remove unmaintained style guide][35124] * [Add s390x support][36369] * [Initial work at Haiku OS support][36727] * [Add mips-uclibc targets][35734] * [Crate-ify compiler-rt into compiler-builtins][35021] * [Add rustc version info (git hash + date) to dist tarball][36213] * Many documentation improvements Compatibility Notes ------------------- * [`SipHasher`] is deprecated. Use [`DefaultHasher`]. * [Deny (by default) transmuting from fn item types to pointer-sized types][34923]. Continuing the long transition to zero-sized fn items, per [RFC 401]. * [Fix `#[derive]` for empty tuple structs/variants][35728]. Part of [RFC 1506]. * [Issue deprecation warnings for safe accesses to extern statics][36173] * [Fix lifetime rules for 'if' conditions][36029]. * [Inherit overflow checks for sum and product][36372]. * [Forbid user-defined macros named "macro_rules"][36730]. [33922]: https://github.com/rust-lang/rust/pull/33922 [34623]: https://github.com/rust-lang/rust/pull/34623 [34923]: https://github.com/rust-lang/rust/pull/34923 [34942]: https://github.com/rust-lang/rust/pull/34942 [34982]: https://github.com/rust-lang/rust/pull/34982 [35021]: https://github.com/rust-lang/rust/pull/35021 [35048]: https://github.com/rust-lang/rust/pull/35048 [35074]: https://github.com/rust-lang/rust/pull/35074 [35124]: https://github.com/rust-lang/rust/pull/35124 [35234]: https://github.com/rust-lang/rust/pull/35234 [35238]: https://github.com/rust-lang/rust/pull/35238 [35354]: https://github.com/rust-lang/rust/pull/35354 [35559]: https://github.com/rust-lang/rust/pull/35559 [35585]: https://github.com/rust-lang/rust/pull/35585 [35627]: https://github.com/rust-lang/rust/pull/35627 [35655]: https://github.com/rust-lang/rust/pull/35655 [35702]: https://github.com/rust-lang/rust/pull/35702 [35707]: https://github.com/rust-lang/rust/pull/35707 [35728]: https://github.com/rust-lang/rust/pull/35728 [35734]: https://github.com/rust-lang/rust/pull/35734 [35755]: https://github.com/rust-lang/rust/pull/35755 [35761]: https://github.com/rust-lang/rust/pull/35761 [35764]: https://github.com/rust-lang/rust/pull/35764 [35814]: https://github.com/rust-lang/rust/pull/35814 [35854]: https://github.com/rust-lang/rust/pull/35854 [35871]: https://github.com/rust-lang/rust/pull/35871 [35884]: https://github.com/rust-lang/rust/pull/35884 [35911]: https://github.com/rust-lang/rust/pull/35911 [35969]: https://github.com/rust-lang/rust/pull/35969 [35975]: https://github.com/rust-lang/rust/pull/35975 [36004]: https://github.com/rust-lang/rust/pull/36004 [36008]: https://github.com/rust-lang/rust/pull/36008 [36014]: https://github.com/rust-lang/rust/pull/36014 [36029]: https://github.com/rust-lang/rust/pull/36029 [36059]: https://github.com/rust-lang/rust/pull/36059 [36072]: https://github.com/rust-lang/rust/pull/36072 [36101]: https://github.com/rust-lang/rust/pull/36101 [36104]: https://github.com/rust-lang/rust/pull/36104 [36171]: https://github.com/rust-lang/rust/pull/36171 [36173]: https://github.com/rust-lang/rust/pull/36173 [36178]: https://github.com/rust-lang/rust/pull/36178 [36213]: https://github.com/rust-lang/rust/pull/36213 [36214]: https://github.com/rust-lang/rust/pull/36214 [36264]: https://github.com/rust-lang/rust/pull/36264 [36266]: https://github.com/rust-lang/rust/pull/36266 [36289]: https://github.com/rust-lang/rust/pull/36289 [36338]: https://github.com/rust-lang/rust/pull/36338 [36351]: https://github.com/rust-lang/rust/pull/36351 [36355]: https://github.com/rust-lang/rust/pull/36355 [36369]: https://github.com/rust-lang/rust/pull/36369 [36372]: https://github.com/rust-lang/rust/pull/36372 [36423]: https://github.com/rust-lang/rust/pull/36423 [36482]: https://github.com/rust-lang/rust/pull/36482 [36505]: https://github.com/rust-lang/rust/pull/36505 [36524]: https://github.com/rust-lang/rust/pull/36524 [36527]: https://github.com/rust-lang/rust/pull/36527 [36551]: https://github.com/rust-lang/rust/pull/36551 [36574]: https://github.com/rust-lang/rust/pull/36574 [36586]: https://github.com/rust-lang/rust/pull/36586 [36592]: https://github.com/rust-lang/rust/pull/36592 [36631]: https://github.com/rust-lang/rust/pull/36631 [36639]: https://github.com/rust-lang/rust/pull/36639 [36721]: https://github.com/rust-lang/rust/pull/36721 [36727]: https://github.com/rust-lang/rust/pull/36727 [36730]: https://github.com/rust-lang/rust/pull/36730 [36734]: https://github.com/rust-lang/rust/pull/36734 [36754]: https://github.com/rust-lang/rust/pull/36754 [36995]: https://github.com/rust-lang/rust/pull/36995 [RFC 0016]: https://github.com/rust-lang/rfcs/blob/master/text/0016-more-attributes.md [RFC 0243]: https://github.com/rust-lang/rfcs/blob/master/text/0243-trait-based-exception-handling.md [RFC 1506]: https://github.com/rust-lang/rfcs/blob/master/text/1506-adt-kinds.md [RFC 401]: https://github.com/rust-lang/rfcs/blob/master/text/0401-coercions.md [RFC 873]: https://github.com/rust-lang/rfcs/blob/master/text/0873-type-macros.md [cargo/2818]: https://github.com/rust-lang/cargo/pull/2818 [cargo/3000]: https://github.com/rust-lang/cargo/pull/3000 [cargo/3021]: https://github.com/rust-lang/cargo/pull/3021 [cargo/3038]: https://github.com/rust-lang/cargo/pull/3038 [cargo/3060]: https://github.com/rust-lang/cargo/pull/3060 [cargo/3078]: https://github.com/rust-lang/cargo/pull/3078 [cargo/3089]: https://github.com/rust-lang/cargo/pull/3089 [cargo/3092]: https://github.com/rust-lang/cargo/pull/3092 [cargo/3110]: https://github.com/rust-lang/cargo/pull/3110 [cargo/3121]: https://github.com/rust-lang/cargo/pull/3121 [cargo/3123]: https://github.com/rust-lang/cargo/pull/3123 [cargo/3125]: https://github.com/rust-lang/cargo/pull/3125 [cargo/3136]: https://github.com/rust-lang/cargo/pull/3136 [cargo/3144]: https://github.com/rust-lang/cargo/pull/3144 [cargo/3146]: https://github.com/rust-lang/cargo/pull/3146 [cargo/3157]: https://github.com/rust-lang/cargo/pull/3157 [cargo/3162]: https://github.com/rust-lang/cargo/pull/3162 [cargo/3205]: https://github.com/rust-lang/cargo/pull/3205 [cargo/3241]: https://github.com/rust-lang/cargo/pull/3241 [cargo/3242]: https://github.com/rust-lang/cargo/pull/3242 [rustup]: https://www.rustup.rs [`checked_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.checked_abs [`wrapping_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.wrapping_abs [`overflowing_abs`]: https://doc.rust-lang.org/std/primitive.i32.html#method.overflowing_abs [`RefCell::try_borrow`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow [`RefCell::try_borrow_mut`]: https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.try_borrow_mut [`SipHasher`]: https://doc.rust-lang.org/std/hash/struct.SipHasher.html [`DefaultHasher`]: https://doc.rust-lang.org/std/collections/hash_map/struct.DefaultHasher.html Version 1.12.1 (2016-10-20) =========================== Regression Fixes ---------------- * [ICE: 'rustc' panicked at 'assertion failed: concrete_substs.is_normalized_for_trans()' #36381][36381] * [Confusion with double negation and booleans][36856] * [rustc 1.12.0 fails with SIGSEGV in release mode (syn crate 0.8.0)][36875] * [Rustc 1.12.0 Windows build of `ethcore` crate fails with LLVM error][36924] * [1.12.0: High memory usage when linking in release mode with debug info][36926] * [Corrupted memory after updated to 1.12][36936] * ["Let NullaryConstructor = something;" causes internal compiler error: "tried to overwrite interned AdtDef"][37026] * [Fix ICE: inject bitcast if types mismatch for invokes/calls/stores][37112] * [debuginfo: Handle spread_arg case in MIR-trans in a more stable way.][37153] [36381]: https://github.com/rust-lang/rust/issues/36381 [36856]: https://github.com/rust-lang/rust/issues/36856 [36875]: https://github.com/rust-lang/rust/issues/36875 [36924]: https://github.com/rust-lang/rust/issues/36924 [36926]: https://github.com/rust-lang/rust/issues/36926 [36936]: https://github.com/rust-lang/rust/issues/36936 [37026]: https://github.com/rust-lang/rust/issues/37026 [37112]: https://github.com/rust-lang/rust/issues/37112 [37153]: https://github.com/rust-lang/rust/issues/37153 Version 1.12.0 (2016-09-29) =========================== Highlights ---------- * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)] (https://github.com/rust-lang/rust/pull/34096). This translation pass is far simpler than the previous AST->LLVM pass, and creates opportunities to perform new optimizations directly on the MIR. It was previously described [on the Rust blog] (https://blog.rust-lang.org/2016/04/19/MIR.html). * [`rustc` presents a new, more readable error format, along with machine-readable JSON error output for use by IDEs] (https://github.com/rust-lang/rust/pull/35401). Most common editors supporting Rust have been updated to work with it. It was previously described [on the Rust blog] (https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html). Compiler -------- * [`rustc` translates code to LLVM IR via its own "middle" IR (MIR)] (https://github.com/rust-lang/rust/pull/34096). This translation pass is far simpler than the previous AST->LLVM pass, and creates opportunities to perform new optimizations directly on the MIR. It was previously described [on the Rust blog] (https://blog.rust-lang.org/2016/04/19/MIR.html). * [Print the Rust target name, not the LLVM target name, with `--print target-list`] (https://github.com/rust-lang/rust/pull/35489) * [The computation of `TypeId` is correct in some cases where it was previously producing inconsistent results] (https://github.com/rust-lang/rust/pull/35267) * [The `mips-unknown-linux-gnu` target uses hardware floating point by default] (https://github.com/rust-lang/rust/pull/34910) * [The `rustc` arguments, `--print target-cpus`, `--print target-features`, `--print relocation-models`, and `--print code-models` print the available options to the `-C target-cpu`, `-C target-feature`, `-C relocation-model` and `-C code-model` code generation arguments] (https://github.com/rust-lang/rust/pull/34845) * [`rustc` supports three new MUSL targets on ARM: `arm-unknown-linux-musleabi`, `arm-unknown-linux-musleabihf`, and `armv7-unknown-linux-musleabihf`] (https://github.com/rust-lang/rust/pull/35060). These targets produce statically-linked binaries. There are no binary release builds yet though. Diagnostics ----------- * [`rustc` presents a new, more readable error format, along with machine-readable JSON error output for use by IDEs] (https://github.com/rust-lang/rust/pull/35401). Most common editors supporting Rust have been updated to work with it. It was previously described [on the Rust blog] (https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html). * [In error descriptions, references are now described in plain English, instead of as "&-ptr"] (https://github.com/rust-lang/rust/pull/35611) * [In error type descriptions, unknown numeric types are named `{integer}` or `{float}` instead of `_`] (https://github.com/rust-lang/rust/pull/35080) * [`rustc` emits a clearer error when inner attributes follow a doc comment] (https://github.com/rust-lang/rust/pull/34676) Language -------- * [`macro_rules!` invocations can be made within `macro_rules!` invocations] (https://github.com/rust-lang/rust/pull/34925) * [`macro_rules!` meta-variables are hygienic] (https://github.com/rust-lang/rust/pull/35453) * [`macro_rules!` `tt` matchers can be reparsed correctly, making them much more useful] (https://github.com/rust-lang/rust/pull/34908) * [`macro_rules!` `stmt` matchers correctly consume the entire contents when inside non-braces invocations] (https://github.com/rust-lang/rust/pull/34886) * [Semicolons are properly required as statement delimeters inside `macro_rules!` invocations] (https://github.com/rust-lang/rust/pull/34660) * [`cfg_attr` works on `path` attributes] (https://github.com/rust-lang/rust/pull/34546) Stabilized APIs --------------- * [`Cell::as_ptr`] (https://doc.rust-lang.org/std/cell/struct.Cell.html#method.as_ptr) * [`RefCell::as_ptr`] (https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.as_ptr) * [`IpAddr::is_unspecified`] (https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_unspecified) * [`IpAddr::is_loopback`] (https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_loopback) * [`IpAddr::is_multicast`] (https://doc.rust-lang.org/std/net/enum.IpAddr.html#method.is_multicast) * [`Ipv4Addr::is_unspecified`] (https://doc.rust-lang.org/std/net/struct.Ipv4Addr.html#method.is_unspecified) * [`Ipv6Addr::octets`] (https://doc.rust-lang.org/std/net/struct.Ipv6Addr.html#method.octets) * [`LinkedList::contains`] (https://doc.rust-lang.org/std/collections/linked_list/struct.LinkedList.html#method.contains) * [`VecDeque::contains`] (https://doc.rust-lang.org/std/collections/vec_deque/struct.VecDeque.html#method.contains) * [`ExitStatusExt::from_raw`] (https://doc.rust-lang.org/std/os/unix/process/trait.ExitStatusExt.html#tymethod.from_raw). Both on Unix and Windows. * [`Receiver::recv_timeout`] (https://doc.rust-lang.org/std/sync/mpsc/struct.Receiver.html#method.recv_timeout) * [`RecvTimeoutError`] (https://doc.rust-lang.org/std/sync/mpsc/enum.RecvTimeoutError.html) * [`BinaryHeap::peek_mut`] (https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.peek_mut) * [`PeekMut`] (https://doc.rust-lang.org/std/collections/binary_heap/struct.PeekMut.html) * [`iter::Product`] (https://doc.rust-lang.org/std/iter/trait.Product.html) * [`iter::Sum`] (https://doc.rust-lang.org/std/iter/trait.Sum.html) * [`OccupiedEntry::remove_entry`] (https://doc.rust-lang.org/std/collections/btree_map/struct.OccupiedEntry.html#method.remove_entry) * [`VacantEntry::into_key`] (https://doc.rust-lang.org/std/collections/btree_map/struct.VacantEntry.html#method.into_key) Libraries --------- * [The `format!` macro and friends now allow a single argument to be formatted in multiple styles] (https://github.com/rust-lang/rust/pull/33642) * [The lifetime bounds on `[T]::binary_search_by` and `[T]::binary_search_by_key` have been adjusted to be more flexible] (https://github.com/rust-lang/rust/pull/34762) * [`Option` implements `From` for its contained type] (https://github.com/rust-lang/rust/pull/34828) * [`Cell`, `RefCell` and `UnsafeCell` implement `From` for their contained type] (https://github.com/rust-lang/rust/pull/35392) * [`RwLock` panics if the reader count overflows] (https://github.com/rust-lang/rust/pull/35378) * [`vec_deque::Drain`, `hash_map::Drain` and `hash_set::Drain` are covariant] (https://github.com/rust-lang/rust/pull/35354) * [`vec::Drain` and `binary_heap::Drain` are covariant] (https://github.com/rust-lang/rust/pull/34951) * [`Cow` implements `FromIterator` for `char`, `&str` and `String`] (https://github.com/rust-lang/rust/pull/35064) * [Sockets on Linux are correctly closed in subprocesses via `SOCK_CLOEXEC`] (https://github.com/rust-lang/rust/pull/34946) * [`hash_map::Entry`, `hash_map::VacantEntry` and `hash_map::OccupiedEntry` implement `Debug`] (https://github.com/rust-lang/rust/pull/34937) * [`btree_map::Entry`, `btree_map::VacantEntry` and `btree_map::OccupiedEntry` implement `Debug`] (https://github.com/rust-lang/rust/pull/34885) * [`String` implements `AddAssign`] (https://github.com/rust-lang/rust/pull/34890) * [Variadic `extern fn` pointers implement the `Clone`, `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and `fmt::Debug` traits] (https://github.com/rust-lang/rust/pull/34879) * [`FileType` implements `Debug`] (https://github.com/rust-lang/rust/pull/34757) * [References to `Mutex` and `RwLock` are unwind-safe] (https://github.com/rust-lang/rust/pull/34756) * [`mpsc::sync_channel` `Receiver`s return any available message before reporting a disconnect] (https://github.com/rust-lang/rust/pull/34731) * [Unicode definitions have been updated to 9.0] (https://github.com/rust-lang/rust/pull/34599) * [`env` iterators implement `DoubleEndedIterator`] (https://github.com/rust-lang/rust/pull/33312) Cargo ----- * [Support local mirrors of registries] (https://github.com/rust-lang/cargo/pull/2857) * [Add support for command aliases] (https://github.com/rust-lang/cargo/pull/2679) * [Allow `opt-level="s"` / `opt-level="z"` in profile overrides] (https://github.com/rust-lang/cargo/pull/3007) * [Make `cargo doc --open --target` work as expected] (https://github.com/rust-lang/cargo/pull/2988) * [Speed up noop registry updates] (https://github.com/rust-lang/cargo/pull/2974) * [Update OpenSSL] (https://github.com/rust-lang/cargo/pull/2971) * [Fix `--panic=abort` with plugins] (https://github.com/rust-lang/cargo/pull/2954) * [Always pass `-C metadata` to the compiler] (https://github.com/rust-lang/cargo/pull/2946) * [Fix depending on git repos with workspaces] (https://github.com/rust-lang/cargo/pull/2938) * [Add a `--lib` flag to `cargo new`] (https://github.com/rust-lang/cargo/pull/2921) * [Add `http.cainfo` for custom certs] (https://github.com/rust-lang/cargo/pull/2917) * [Indicate the compilation profile after compiling] (https://github.com/rust-lang/cargo/pull/2909) * [Allow enabling features for dependencies with `--features`] (https://github.com/rust-lang/cargo/pull/2876) * [Add `--jobs` flag to `cargo package`] (https://github.com/rust-lang/cargo/pull/2867) * [Add `--dry-run` to `cargo publish`] (https://github.com/rust-lang/cargo/pull/2849) * [Add support for `RUSTDOCFLAGS`] (https://github.com/rust-lang/cargo/pull/2794) Performance ----------- * [`panic::catch_unwind` is more optimized] (https://github.com/rust-lang/rust/pull/35444) * [`panic::catch_unwind` no longer accesses thread-local storage on entry] (https://github.com/rust-lang/rust/pull/34866) Tooling ------- * [Test binaries now support a `--test-threads` argument to specify the number of threads used to run tests, and which acts the same as the `RUST_TEST_THREADS` environment variable] (https://github.com/rust-lang/rust/pull/35414) * [The test runner now emits a warning when tests run over 60 seconds] (https://github.com/rust-lang/rust/pull/35405) * [rustdoc: Fix methods in search results] (https://github.com/rust-lang/rust/pull/34752) * [`rust-lldb` warns about unsupported versions of LLDB] (https://github.com/rust-lang/rust/pull/34646) * [Rust releases now come with source packages that can be installed by rustup via `rustup component add rust-src`] (https://github.com/rust-lang/rust/pull/34366). The resulting source code can be used by tools and IDES, located in the sysroot under `lib/rustlib/src`. Misc ---- * [The compiler can now be built against LLVM 3.9] (https://github.com/rust-lang/rust/pull/35594) * Many minor improvements to the documentation. * [The Rust exception handling "personality" routine is now written in Rust] (https://github.com/rust-lang/rust/pull/34832) Compatibility Notes ------------------- * [When printing Windows `OsStr`s, unpaired surrogate codepoints are escaped with the lowercase format instead of the uppercase] (https://github.com/rust-lang/rust/pull/35084) * [When formatting strings, if "precision" is specified, the "fill", "align" and "width" specifiers are no longer ignored] (https://github.com/rust-lang/rust/pull/34544) * [The `Debug` impl for strings no longer escapes all non-ASCII characters] (https://github.com/rust-lang/rust/pull/34485) Version 1.11.0 (2016-08-18) =========================== Language -------- * [`cfg_attr` works on `path` attributes] (https://github.com/rust-lang/rust/pull/34546) * [Support nested `cfg_attr` attributes] (https://github.com/rust-lang/rust/pull/34216) * [Allow statement-generating braced macro invocations at the end of blocks] (https://github.com/rust-lang/rust/pull/34436) * [Macros can be expanded inside of trait definitions] (https://github.com/rust-lang/rust/pull/34213) * [`#[macro_use]` works properly when it is itself expanded from a macro] (https://github.com/rust-lang/rust/pull/34032) Stabilized APIs --------------- * [`BinaryHeap::append`] (https://doc.rust-lang.org/std/collections/binary_heap/struct.BinaryHeap.html#method.append) * [`BTreeMap::append`] (https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.append) * [`BTreeMap::split_off`] (https://doc.rust-lang.org/std/collections/btree_map/struct.BTreeMap.html#method.split_off) * [`BTreeSet::append`] (https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.append) * [`BTreeSet::split_off`] (https://doc.rust-lang.org/std/collections/btree_set/struct.BTreeSet.html#method.split_off) * [`f32::to_degrees`] (https://doc.rust-lang.org/std/primitive.f32.html#method.to_degrees) (in libcore - previously stabilized in libstd) * [`f32::to_radians`] (https://doc.rust-lang.org/std/primitive.f32.html#method.to_radians) (in libcore - previously stabilized in libstd) * [`f64::to_degrees`] (https://doc.rust-lang.org/std/primitive.f64.html#method.to_degrees) (in libcore - previously stabilized in libstd) * [`f64::to_radians`] (https://doc.rust-lang.org/std/primitive.f64.html#method.to_radians) (in libcore - previously stabilized in libstd) * [`Iterator::sum`] (https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum) * [`Iterator::product`] (https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.sum) * [`Cell::get_mut`] (https://doc.rust-lang.org/std/cell/struct.Cell.html#method.get_mut) * [`RefCell::get_mut`] (https://doc.rust-lang.org/std/cell/struct.RefCell.html#method.get_mut) Libraries --------- * [The `thread_local!` macro supports multiple definitions in a single invocation, and can apply attributes] (https://github.com/rust-lang/rust/pull/34077) * [`Cow` implements `Default`] (https://github.com/rust-lang/rust/pull/34305) * [`Wrapping` implements binary, octal, lower-hex and upper-hex `Display` formatting] (https://github.com/rust-lang/rust/pull/34190) * [The range types implement `Hash`] (https://github.com/rust-lang/rust/pull/34180) * [`lookup_host` ignores unknown address types] (https://github.com/rust-lang/rust/pull/34067) * [`assert_eq!` accepts a custom error message, like `assert!` does] (https://github.com/rust-lang/rust/pull/33976) * [The main thread is now called "main" instead of "<main>"] (https://github.com/rust-lang/rust/pull/33803) Cargo ----- * [Disallow specifying features of transitive deps] (https://github.com/rust-lang/cargo/pull/2821) * [Add color support for Windows consoles] (https://github.com/rust-lang/cargo/pull/2804) * [Fix `harness = false` on `[lib]` sections] (https://github.com/rust-lang/cargo/pull/2795) * [Don't panic when `links` contains a '.'] (https://github.com/rust-lang/cargo/pull/2787) * [Build scripts can emit warnings] (https://github.com/rust-lang/cargo/pull/2630), and `-vv` prints warnings for all crates. * [Ignore file locks on OS X NFS mounts] (https://github.com/rust-lang/cargo/pull/2720) * [Don't warn about `package.metadata` keys] (https://github.com/rust-lang/cargo/pull/2668). This provides room for expansion by arbitrary tools. * [Add support for cdylib crate types] (https://github.com/rust-lang/cargo/pull/2741) * [Prevent publishing crates when files are dirty] (https://github.com/rust-lang/cargo/pull/2781) * [Don't fetch all crates on clean] (https://github.com/rust-lang/cargo/pull/2704) * [Propagate --color option to rustc] (https://github.com/rust-lang/cargo/pull/2779) * [Fix `cargo doc --open` on Windows] (https://github.com/rust-lang/cargo/pull/2780) * [Improve autocompletion] (https://github.com/rust-lang/cargo/pull/2772) * [Configure colors of stderr as well as stdout] (https://github.com/rust-lang/cargo/pull/2739) Performance ----------- * [Caching projections speeds up type check dramatically for some workloads] (https://github.com/rust-lang/rust/pull/33816) * [The default `HashMap` hasher is SipHash 1-3 instead of SipHash 2-4] (https://github.com/rust-lang/rust/pull/33940) This hasher is faster, but is believed to provide sufficient protection from collision attacks. * [Comparison of `Ipv4Addr` is 10x faster] (https://github.com/rust-lang/rust/pull/33891) Rustdoc ------- * [Fix empty implementation section on some module pages] (https://github.com/rust-lang/rust/pull/34536) * [Fix inlined renamed reexports in import lists] (https://github.com/rust-lang/rust/pull/34479) * [Fix search result layout for enum variants and struct fields] (https://github.com/rust-lang/rust/pull/34477) * [Fix issues with source links to external crates] (https://github.com/rust-lang/rust/pull/34387) * [Fix redirect pages for renamed reexports] (https://github.com/rust-lang/rust/pull/34245) Tooling ------- * [rustc is better at finding the MSVC toolchain] (https://github.com/rust-lang/rust/pull/34492) * [When emitting debug info, rustc emits frame pointers for closures, shims and glue, as it does for all other functions] (https://github.com/rust-lang/rust/pull/33909) * [rust-lldb warns about unsupported versions of LLDB] (https://github.com/rust-lang/rust/pull/34646) * Many more errors have been given error codes and extended explanations * API documentation continues to be improved, with many new examples Misc ---- * [rustc no longer hangs when dependencies recursively re-export submodules] (https://github.com/rust-lang/rust/pull/34542) * [rustc requires LLVM 3.7+] (https://github.com/rust-lang/rust/pull/34104) * [The 'How Safe and Unsafe Interact' chapter of The Rustonomicon was rewritten] (https://github.com/rust-lang/rust/pull/33895) * [rustc support 16-bit pointer sizes] (https://github.com/rust-lang/rust/pull/33460). No targets use this yet, but it works toward AVR support. Compatibility Notes ------------------- * [`const`s and `static`s may not have unsized types] (https://github.com/rust-lang/rust/pull/34443) * [The new follow-set rules that place restrictions on `macro_rules!` in order to ensure syntax forward-compatibility have been enabled] (https://github.com/rust-lang/rust/pull/33982) This was an [ammendment to RFC 550] (https://github.com/rust-lang/rfcs/pull/1384), and has been a warning since 1.10. * [`cfg` attribute process has been refactored to fix various bugs] (https://github.com/rust-lang/rust/pull/33706). This causes breakage in some corner cases. Version 1.10.0 (2016-07-07) =========================== Language -------- * [Allow `concat_idents!` in type positions as well as in expression positions] (https://github.com/rust-lang/rust/pull/33735). * [`Copy` types are required to have a trivial implementation of `Clone`] (https://github.com/rust-lang/rust/pull/33420). [RFC 1521](https://github.com/rust-lang/rfcs/blob/master/text/1521-copy-clone-semantics.md). * [Single-variant enums support the `#[repr(..)]` attribute] (https://github.com/rust-lang/rust/pull/33355). * [Fix `#[derive(RustcEncodable)]` in the presence of other `encode` methods] (https://github.com/rust-lang/rust/pull/32908). * [`panic!` can be converted to a runtime abort with the `-C panic=abort` flag] (https://github.com/rust-lang/rust/pull/32900). [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md). * [Add a new crate type, 'cdylib'] (https://github.com/rust-lang/rust/pull/33553). cdylibs are dynamic libraries suitable for loading by non-Rust hosts. [RFC 1510](https://github.com/rust-lang/rfcs/blob/master/text/1510-rdylib.md). Note that Cargo does not yet directly support cdylibs. Stabilized APIs --------------- * `os::windows::fs::OpenOptionsExt::access_mode` * `os::windows::fs::OpenOptionsExt::share_mode` * `os::windows::fs::OpenOptionsExt::custom_flags` * `os::windows::fs::OpenOptionsExt::attributes` * `os::windows::fs::OpenOptionsExt::security_qos_flags` * `os::unix::fs::OpenOptionsExt::custom_flags` * [`sync::Weak::new`] (http://doc.rust-lang.org/alloc/arc/struct.Weak.html#method.new) * `Default for sync::Weak` * [`panic::set_hook`] (http://doc.rust-lang.org/std/panic/fn.set_hook.html) * [`panic::take_hook`] (http://doc.rust-lang.org/std/panic/fn.take_hook.html) * [`panic::PanicInfo`] (http://doc.rust-lang.org/std/panic/struct.PanicInfo.html) * [`panic::PanicInfo::payload`] (http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.payload) * [`panic::PanicInfo::location`] (http://doc.rust-lang.org/std/panic/struct.PanicInfo.html#method.location) * [`panic::Location`] (http://doc.rust-lang.org/std/panic/struct.Location.html) * [`panic::Location::file`] (http://doc.rust-lang.org/std/panic/struct.Location.html#method.file) * [`panic::Location::line`] (http://doc.rust-lang.org/std/panic/struct.Location.html#method.line) * [`ffi::CStr::from_bytes_with_nul`] (http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul) * [`ffi::CStr::from_bytes_with_nul_unchecked`] (http://doc.rust-lang.org/std/ffi/struct.CStr.html#method.from_bytes_with_nul_unchecked) * [`ffi::FromBytesWithNulError`] (http://doc.rust-lang.org/std/ffi/struct.FromBytesWithNulError.html) * [`fs::Metadata::modified`] (http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.modified) * [`fs::Metadata::accessed`] (http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.accessed) * [`fs::Metadata::created`] (http://doc.rust-lang.org/std/fs/struct.Metadata.html#method.created) * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange` * `sync::atomic::Atomic{Usize,Isize,Bool,Ptr}::compare_exchange_weak` * `collections::{btree,hash}_map::{Occupied,Vacant,}Entry::key` * `os::unix::net::{UnixStream, UnixListener, UnixDatagram, SocketAddr}` * [`SocketAddr::is_unnamed`] (http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.is_unnamed) * [`SocketAddr::as_pathname`] (http://doc.rust-lang.org/std/os/unix/net/struct.SocketAddr.html#method.as_pathname) * [`UnixStream::connect`] (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.connect) * [`UnixStream::pair`] (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.pair) * [`UnixStream::try_clone`] (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.try_clone) * [`UnixStream::local_addr`] (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.local_addr) * [`UnixStream::peer_addr`] (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.peer_addr) * [`UnixStream::set_read_timeout`] (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout) * [`UnixStream::set_write_timeout`] (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout) * [`UnixStream::read_timeout`] (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.read_timeout) * [`UnixStream::write_timeout`] (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.write_timeout) * [`UnixStream::set_nonblocking`] (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.set_nonblocking) * [`UnixStream::take_error`] (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.take_error) * [`UnixStream::shutdown`] (http://doc.rust-lang.org/std/os/unix/net/struct.UnixStream.html#method.shutdown) * Read/Write/RawFd impls for `UnixStream` * [`UnixListener::bind`] (http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.bind) * [`UnixListener::accept`] (http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.accept) * [`UnixListener::try_clone`] (http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.try_clone) * [`UnixListener::local_addr`] (http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.local_addr) * [`UnixListener::set_nonblocking`] (http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.set_nonblocking) * [`UnixListener::take_error`] (http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.take_error) * [`UnixListener::incoming`] (http://doc.rust-lang.org/std/os/unix/net/struct.UnixListener.html#method.incoming) * RawFd impls for `UnixListener` * [`UnixDatagram::bind`] (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.bind) * [`UnixDatagram::unbound`] (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.unbound) * [`UnixDatagram::pair`] (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.pair) * [`UnixDatagram::connect`] (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.connect) * [`UnixDatagram::try_clone`] (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.try_clone) * [`UnixDatagram::local_addr`] (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.local_addr) * [`UnixDatagram::peer_addr`] (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.peer_addr) * [`UnixDatagram::recv_from`] (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv_from) * [`UnixDatagram::recv`] (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.recv) * [`UnixDatagram::send_to`] (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send_to) * [`UnixDatagram::send`] (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.send) * [`UnixDatagram::set_read_timeout`] (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_read_timeout) * [`UnixDatagram::set_write_timeout`] (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_write_timeout) * [`UnixDatagram::read_timeout`] (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.read_timeout) * [`UnixDatagram::write_timeout`] (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.write_timeout) * [`UnixDatagram::set_nonblocking`] (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.set_nonblocking) * [`UnixDatagram::take_error`] (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.take_error) * [`UnixDatagram::shutdown`] (http://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html#method.shutdown) * RawFd impls for `UnixDatagram` * `{BTree,Hash}Map::values_mut` * [`<[_]>::binary_search_by_key`] (http://doc.rust-lang.org/beta/std/primitive.slice.html#method.binary_search_by_key) Libraries --------- * [The `abs_sub` method of floats is deprecated] (https://github.com/rust-lang/rust/pull/33664). The semantics of this minor method are subtle and probably not what most people want. * [Add implementation of Ord for Cell and RefCell where T: Ord] (https://github.com/rust-lang/rust/pull/33306). * [On Linux, if `HashMap`s can't be initialized with `getrandom` they will fall back to `/dev/urandom` temporarily to avoid blocking during early boot] (https://github.com/rust-lang/rust/pull/33086). * [Implemented negation for wrapping numerals] (https://github.com/rust-lang/rust/pull/33067). * [Implement `Clone` for `binary_heap::IntoIter`] (https://github.com/rust-lang/rust/pull/33050). * [Implement `Display` and `Hash` for `std::num::Wrapping`] (https://github.com/rust-lang/rust/pull/33023). * [Add `Default` implementation for `&CStr`, `CString`] (https://github.com/rust-lang/rust/pull/32990). * [Implement `From>` and `Into>` for `VecDeque`] (https://github.com/rust-lang/rust/pull/32866). * [Implement `Default` for `UnsafeCell`, `fmt::Error`, `Condvar`, `Mutex`, `RwLock`] (https://github.com/rust-lang/rust/pull/32785). Cargo ----- * [Cargo.toml supports the `profile.*.panic` option] (https://github.com/rust-lang/cargo/pull/2687). This controls the runtime behavior of the `panic!` macro and can be either "unwind" (the default), or "abort". [RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md). * [Don't throw away errors with `-p` arguments] (https://github.com/rust-lang/cargo/pull/2723). * [Report status to stderr instead of stdout] (https://github.com/rust-lang/cargo/pull/2693). * [Build scripts are passed a `CARGO_MANIFEST_LINKS` environment variable that corresponds to the `links` field of the manifest] (https://github.com/rust-lang/cargo/pull/2710). * [Ban keywords from crate names] (https://github.com/rust-lang/cargo/pull/2707). * [Canonicalize `CARGO_HOME` on Windows] (https://github.com/rust-lang/cargo/pull/2604). * [Retry network requests] (https://github.com/rust-lang/cargo/pull/2396). By default they are retried twice, which can be customized with the `net.retry` value in `.cargo/config`. * [Don't print extra error info for failing subcommands] (https://github.com/rust-lang/cargo/pull/2674). * [Add `--force` flag to `cargo install`] (https://github.com/rust-lang/cargo/pull/2405). * [Don't use `flock` on NFS mounts] (https://github.com/rust-lang/cargo/pull/2623). * [Prefer building `cargo install` artifacts in temporary directories] (https://github.com/rust-lang/cargo/pull/2610). Makes it possible to install multiple crates in parallel. * [Add `cargo test --doc`] (https://github.com/rust-lang/cargo/pull/2578). * [Add `cargo --explain`] (https://github.com/rust-lang/cargo/pull/2551). * [Don't print warnings when `-q` is passed] (https://github.com/rust-lang/cargo/pull/2576). * [Add `cargo doc --lib` and `--bin`] (https://github.com/rust-lang/cargo/pull/2577). * [Don't require build script output to be UTF-8] (https://github.com/rust-lang/cargo/pull/2560). * [Correctly attempt multiple git usernames] (https://github.com/rust-lang/cargo/pull/2584). Performance ----------- * [rustc memory usage was reduced by refactoring the context used for type checking] (https://github.com/rust-lang/rust/pull/33425). * [Speed up creation of `HashMap`s by caching the random keys used to initialize the hash state] (https://github.com/rust-lang/rust/pull/33318). * [The `find` implementation for `Chain` iterators is 2x faster] (https://github.com/rust-lang/rust/pull/33289). * [Trait selection optimizations speed up type checking by 15%] (https://github.com/rust-lang/rust/pull/33138). * [Efficient trie lookup for boolean Unicode properties] (https://github.com/rust-lang/rust/pull/33098). 10x faster than the previous lookup tables. * [Special case `#[derive(Copy, Clone)]` to avoid bloat] (https://github.com/rust-lang/rust/pull/31414). Usability --------- * Many incremental improvements to documentation and rustdoc. * [rustdoc: List blanket trait impls] (https://github.com/rust-lang/rust/pull/33514). * [rustdoc: Clean up ABI rendering] (https://github.com/rust-lang/rust/pull/33151). * [Indexing with the wrong type produces a more informative error] (https://github.com/rust-lang/rust/pull/33401). * [Improve diagnostics for constants being used in irrefutable patterns] (https://github.com/rust-lang/rust/pull/33406). * [When many method candidates are in scope limit the suggestions to 10] (https://github.com/rust-lang/rust/pull/33338). * [Remove confusing suggestion when calling a `fn` type] (https://github.com/rust-lang/rust/pull/33325). * [Do not suggest changing `&mut self` to `&mut mut self`] (https://github.com/rust-lang/rust/pull/33319). Misc ---- * [Update i686-linux-android features to match Android ABI] (https://github.com/rust-lang/rust/pull/33651). * [Update aarch64-linux-android features to match Android ABI] (https://github.com/rust-lang/rust/pull/33500). * [`std` no longer prints backtraces on platforms where the running module must be loaded with `env::current_exe`, which can't be relied on](https://github.com/rust-lang/rust/pull/33554). * This release includes std binaries for the i586-unknown-linux-gnu, i686-unknown-linux-musl, and armv7-linux-androideabi targets. The i586 target is for old x86 hardware without SSE2, and the armv7 target is for Android running on modern ARM architectures. * [The `rust-gdb` and `rust-lldb` scripts are distributed on all Unix platforms](https://github.com/rust-lang/rust/pull/32835). * [On Unix the runtime aborts by calling `libc::abort` instead of generating an illegal instruction] (https://github.com/rust-lang/rust/pull/31457). * [Rust is now bootstrapped from the previous release of Rust, instead of a snapshot from an arbitrary commit] (https://github.com/rust-lang/rust/pull/32942). Compatibility Notes ------------------- * [`AtomicBool` is now bool-sized, not word-sized] (https://github.com/rust-lang/rust/pull/33579). * [`target_env` for Linux ARM targets is just `gnu`, not `gnueabihf`, `gnueabi`, etc] (https://github.com/rust-lang/rust/pull/33403). * [Consistently panic on overflow in `Duration::new`] (https://github.com/rust-lang/rust/pull/33072). * [Change `String::truncate` to panic less] (https://github.com/rust-lang/rust/pull/32977). * [Add `:block` to the follow set for `:ty` and `:path`] (https://github.com/rust-lang/rust/pull/32945). Affects how macros are parsed. * [Fix macro hygiene bug] (https://github.com/rust-lang/rust/pull/32923). * [Feature-gated attributes on macro-generated macro invocations are now rejected] (https://github.com/rust-lang/rust/pull/32791). * [Suppress fallback and ambiguity errors during type inference] (https://github.com/rust-lang/rust/pull/32258). This caused some minor changes to type inference. Version 1.9.0 (2016-05-26) ========================== Language -------- * The `#[deprecated]` attribute when applied to an API will generate warnings when used. The warnings may be suppressed with `#[allow(deprecated)]`. [RFC 1270]. * [`fn` item types are zero sized, and each `fn` names a unique type][1.9fn]. This will break code that transmutes `fn`s, so calling `transmute` on a `fn` type will generate a warning for a few cycles, then will be converted to an error. * [Field and method resolution understand visibility, so private fields and methods cannot prevent the proper use of public fields and methods][1.9fv]. * [The parser considers unicode codepoints in the `PATTERN_WHITE_SPACE` category to be whitespace][1.9ws]. Stabilized APIs --------------- * [`std::panic`] * [`std::panic::catch_unwind`][] (renamed from `recover`) * [`std::panic::resume_unwind`][] (renamed from `propagate`) * [`std::panic::AssertUnwindSafe`][] (renamed from `AssertRecoverSafe`) * [`std::panic::UnwindSafe`][] (renamed from `RecoverSafe`) * [`str::is_char_boundary`] * [`<*const T>::as_ref`] * [`<*mut T>::as_ref`] * [`<*mut T>::as_mut`] * [`AsciiExt::make_ascii_uppercase`] * [`AsciiExt::make_ascii_lowercase`] * [`char::decode_utf16`] * [`char::DecodeUtf16`] * [`char::DecodeUtf16Error`] * [`char::DecodeUtf16Error::unpaired_surrogate`] * [`BTreeSet::take`] * [`BTreeSet::replace`] * [`BTreeSet::get`] * [`HashSet::take`] * [`HashSet::replace`] * [`HashSet::get`] * [`OsString::with_capacity`] * [`OsString::clear`] * [`OsString::capacity`] * [`OsString::reserve`] * [`OsString::reserve_exact`] * [`OsStr::is_empty`] * [`OsStr::len`] * [`std::os::unix::thread`] * [`RawPthread`] * [`JoinHandleExt`] * [`JoinHandleExt::as_pthread_t`] * [`JoinHandleExt::into_pthread_t`] * [`HashSet::hasher`] * [`HashMap::hasher`] * [`CommandExt::exec`] * [`File::try_clone`] * [`SocketAddr::set_ip`] * [`SocketAddr::set_port`] * [`SocketAddrV4::set_ip`] * [`SocketAddrV4::set_port`] * [`SocketAddrV6::set_ip`] * [`SocketAddrV6::set_port`] * [`SocketAddrV6::set_flowinfo`] * [`SocketAddrV6::set_scope_id`] * [`slice::copy_from_slice`] * [`ptr::read_volatile`] * [`ptr::write_volatile`] * [`OpenOptions::create_new`] * [`TcpStream::set_nodelay`] * [`TcpStream::nodelay`] * [`TcpStream::set_ttl`] * [`TcpStream::ttl`] * [`TcpStream::set_only_v6`] * [`TcpStream::only_v6`] * [`TcpStream::take_error`] * [`TcpStream::set_nonblocking`] * [`TcpListener::set_ttl`] * [`TcpListener::ttl`] * [`TcpListener::set_only_v6`] * [`TcpListener::only_v6`] * [`TcpListener::take_error`] * [`TcpListener::set_nonblocking`] * [`UdpSocket::set_broadcast`] * [`UdpSocket::broadcast`] * [`UdpSocket::set_multicast_loop_v4`] * [`UdpSocket::multicast_loop_v4`] * [`UdpSocket::set_multicast_ttl_v4`] * [`UdpSocket::multicast_ttl_v4`] * [`UdpSocket::set_multicast_loop_v6`] * [`UdpSocket::multicast_loop_v6`] * [`UdpSocket::set_multicast_ttl_v6`] * [`UdpSocket::multicast_ttl_v6`] * [`UdpSocket::set_ttl`] * [`UdpSocket::ttl`] * [`UdpSocket::set_only_v6`] * [`UdpSocket::only_v6`] * [`UdpSocket::join_multicast_v4`] * [`UdpSocket::join_multicast_v6`] * [`UdpSocket::leave_multicast_v4`] * [`UdpSocket::leave_multicast_v6`] * [`UdpSocket::take_error`] * [`UdpSocket::connect`] * [`UdpSocket::send`] * [`UdpSocket::recv`] * [`UdpSocket::set_nonblocking`] Libraries --------- * [`std::sync::Once` is poisoned if its initialization function fails][1.9o]. * [`cell::Ref` and `cell::RefMut` can contain unsized types][1.9cu]. * [Most types implement `fmt::Debug`][1.9db]. * [The default buffer size used by `BufReader` and `BufWriter` was reduced to 8K, from 64K][1.9bf]. This is in line with the buffer size used by other languages. * [`Instant`, `SystemTime` and `Duration` implement `+=` and `-=`. `Duration` additionally implements `*=` and `/=`][1.9ta]. * [`Skip` is a `DoubleEndedIterator`][1.9sk]. * [`From<[u8; 4]>` is implemented for `Ipv4Addr`][1.9fi]. * [`Chain` implements `BufRead`][1.9ch]. * [`HashMap`, `HashSet` and iterators are covariant][1.9hc]. Cargo ----- * [Cargo can now run concurrently][1.9cc]. * [Top-level overrides allow specific revisions of crates to be overridden through the entire crate graph][1.9ct]. This is intended to make upgrades easier for large projects, by allowing crates to be forked temporarily until they've been upgraded and republished. * [Cargo exports a `CARGO_PKG_AUTHORS` environment variable][1.9cp]. * [Cargo will pass the contents of the `RUSTFLAGS` variable to `rustc` on the commandline][1.9cf]. `rustc` arguments can also be specified in the `build.rustflags` configuration key. Performance ----------- * [The time complexity of comparing variables for equivalence during type unification is reduced from _O_(_n_!) to _O_(_n_)][1.9tu]. This leads to major compilation time improvement in some scenarios. * [`ToString` is specialized for `str`, giving it the same performance as `to_owned`][1.9ts]. * [Spawning processes with `Command::output` no longer creates extra threads][1.9sp]. * [`#[derive(PartialEq)]` and `#[derive(PartialOrd)]` emit less code for C-like enums][1.9cl]. Misc ---- * [Passing the `--quiet` flag to a test runner will produce much-abbreviated output][1.9q]. * The Rust Project now publishes std binaries for the `mips-unknown-linux-musl`, `mipsel-unknown-linux-musl`, and `i586-pc-windows-msvc` targets. Compatibility Notes ------------------- * [`std::sync::Once` is poisoned if its initialization function fails][1.9o]. * [It is illegal to define methods with the same name in overlapping inherent `impl` blocks][1.9sn]. * [`fn` item types are zero sized, and each `fn` names a unique type][1.9fn]. This will break code that transmutes `fn`s, so calling `transmute` on a `fn` type will generate a warning for a few cycles, then will be converted to an error. * [Improvements to const evaluation may trigger new errors when integer literals are out of range][1.9ce]. [1.9bf]: https://github.com/rust-lang/rust/pull/32695 [1.9cc]: https://github.com/rust-lang/cargo/pull/2486 [1.9ce]: https://github.com/rust-lang/rust/pull/30587 [1.9cf]: https://github.com/rust-lang/cargo/pull/2241 [1.9ch]: https://github.com/rust-lang/rust/pull/32541 [1.9cl]: https://github.com/rust-lang/rust/pull/31977 [1.9cp]: https://github.com/rust-lang/cargo/pull/2465 [1.9ct]: https://github.com/rust-lang/cargo/pull/2385 [1.9cu]: https://github.com/rust-lang/rust/pull/32652 [1.9db]: https://github.com/rust-lang/rust/pull/32054 [1.9fi]: https://github.com/rust-lang/rust/pull/32050 [1.9fn]: https://github.com/rust-lang/rust/pull/31710 [1.9fv]: https://github.com/rust-lang/rust/pull/31938 [1.9hc]: https://github.com/rust-lang/rust/pull/32635 [1.9o]: https://github.com/rust-lang/rust/pull/32325 [1.9q]: https://github.com/rust-lang/rust/pull/31887 [1.9sk]: https://github.com/rust-lang/rust/pull/31700 [1.9sn]: https://github.com/rust-lang/rust/pull/31925 [1.9sp]: https://github.com/rust-lang/rust/pull/31618 [1.9ta]: https://github.com/rust-lang/rust/pull/32448 [1.9ts]: https://github.com/rust-lang/rust/pull/32586 [1.9tu]: https://github.com/rust-lang/rust/pull/32062 [1.9ws]: https://github.com/rust-lang/rust/pull/29734 [RFC 1270]: https://github.com/rust-lang/rfcs/blob/master/text/1270-deprecation.md [`<*const T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref [`<*mut T>::as_mut`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_mut [`<*mut T>::as_ref`]: http://doc.rust-lang.org/nightly/std/primitive.pointer.html#method.as_ref [`slice::copy_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.copy_from_slice [`AsciiExt::make_ascii_lowercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_lowercase [`AsciiExt::make_ascii_uppercase`]: http://doc.rust-lang.org/nightly/std/ascii/trait.AsciiExt.html#tymethod.make_ascii_uppercase [`BTreeSet::get`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.get [`BTreeSet::replace`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.replace [`BTreeSet::take`]: http://doc.rust-lang.org/nightly/collections/btree/set/struct.BTreeSet.html#method.take [`CommandExt::exec`]: http://doc.rust-lang.org/nightly/std/os/unix/process/trait.CommandExt.html#tymethod.exec [`File::try_clone`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html#method.try_clone [`HashMap::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.hasher [`HashSet::get`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.get [`HashSet::hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.hasher [`HashSet::replace`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.replace [`HashSet::take`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.take [`JoinHandleExt::as_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.as_pthread_t [`JoinHandleExt::into_pthread_t`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html#tymethod.into_pthread_t [`JoinHandleExt`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/trait.JoinHandleExt.html [`OpenOptions::create_new`]: http://doc.rust-lang.org/nightly/std/fs/struct.OpenOptions.html#method.create_new [`OsStr::is_empty`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.is_empty [`OsStr::len`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsStr.html#method.len [`OsString::capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.capacity [`OsString::clear`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.clear [`OsString::reserve_exact`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve_exact [`OsString::reserve`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.reserve [`OsString::with_capacity`]: http://doc.rust-lang.org/nightly/std/ffi/struct.OsString.html#method.with_capacity [`RawPthread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/type.RawPthread.html [`SocketAddr::set_ip`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_ip [`SocketAddr::set_port`]: http://doc.rust-lang.org/nightly/std/net/enum.SocketAddr.html#method.set_port [`SocketAddrV4::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_ip [`SocketAddrV4::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV4.html#method.set_port [`SocketAddrV6::set_flowinfo`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_flowinfo [`SocketAddrV6::set_ip`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_ip [`SocketAddrV6::set_port`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_port [`SocketAddrV6::set_scope_id`]: http://doc.rust-lang.org/nightly/std/net/struct.SocketAddrV6.html#method.set_scope_id [`TcpListener::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6 [`TcpListener::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking [`TcpListener::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6 [`TcpListener::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl [`TcpListener::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error [`TcpListener::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl [`TcpStream::nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.nodelay [`TcpStream::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.only_v6 [`TcpStream::set_nodelay`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nodelay [`TcpStream::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_nonblocking [`TcpStream::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_only_v6 [`TcpStream::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_ttl [`TcpStream::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.take_error [`TcpStream::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.ttl [`UdpSocket::broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.broadcast [`UdpSocket::connect`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.connect [`UdpSocket::join_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v4 [`UdpSocket::join_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.join_multicast_v6 [`UdpSocket::leave_multicast_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v4 [`UdpSocket::leave_multicast_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.leave_multicast_v6 [`UdpSocket::multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v4 [`UdpSocket::multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_loop_v6 [`UdpSocket::multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v4 [`UdpSocket::multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.multicast_ttl_v6 [`UdpSocket::only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.only_v6 [`UdpSocket::recv`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.recv [`UdpSocket::send`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.send [`UdpSocket::set_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_broadcast [`UdpSocket::set_multicast_loop_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v4 [`UdpSocket::set_multicast_loop_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_loop_v6 [`UdpSocket::set_multicast_ttl_v4`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v4 [`UdpSocket::set_multicast_ttl_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_multicast_ttl_v6 [`UdpSocket::set_nonblocking`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_nonblocking [`UdpSocket::set_only_v6`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_only_v6 [`UdpSocket::set_ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.set_ttl [`UdpSocket::take_error`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.take_error [`UdpSocket::ttl`]: http://doc.rust-lang.org/nightly/std/net/struct.UdpSocket.html#method.ttl [`char::DecodeUtf16Error::unpaired_surrogate`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html#method.unpaired_surrogate [`char::DecodeUtf16Error`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16Error.html [`char::DecodeUtf16`]: http://doc.rust-lang.org/nightly/std/char/struct.DecodeUtf16.html [`char::decode_utf16`]: http://doc.rust-lang.org/nightly/std/char/fn.decode_utf16.html [`ptr::read_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.read_volatile.html [`ptr::write_volatile`]: http://doc.rust-lang.org/nightly/std/ptr/fn.write_volatile.html [`std::os::unix::thread`]: http://doc.rust-lang.org/nightly/std/os/unix/thread/index.html [`std::panic::AssertUnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/struct.AssertUnwindSafe.html [`std::panic::UnwindSafe`]: http://doc.rust-lang.org/nightly/std/panic/trait.UnwindSafe.html [`std::panic::catch_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.catch_unwind.html [`std::panic::resume_unwind`]: http://doc.rust-lang.org/nightly/std/panic/fn.resume_unwind.html [`std::panic`]: http://doc.rust-lang.org/nightly/std/panic/index.html [`str::is_char_boundary`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.is_char_boundary Version 1.8.0 (2016-04-14) ========================== Language -------- * Rust supports overloading of compound assignment statements like `+=` by implementing the [`AddAssign`], [`SubAssign`], [`MulAssign`], [`DivAssign`], [`RemAssign`], [`BitAndAssign`], [`BitOrAssign`], [`BitXorAssign`], [`ShlAssign`], or [`ShrAssign`] traits. [RFC 953]. * Empty structs can be defined with braces, as in `struct Foo { }`, in addition to the non-braced form, `struct Foo;`. [RFC 218]. Libraries --------- * Stabilized APIs: * [`str::encode_utf16`][] (renamed from `utf16_units`) * [`str::EncodeUtf16`][] (renamed from `Utf16Units`) * [`Ref::map`] * [`RefMut::map`] * [`ptr::drop_in_place`] * [`time::Instant`] * [`time::SystemTime`] * [`Instant::now`] * [`Instant::duration_since`][] (renamed from `duration_from_earlier`) * [`Instant::elapsed`] * [`SystemTime::now`] * [`SystemTime::duration_since`][] (renamed from `duration_from_earlier`) * [`SystemTime::elapsed`] * Various `Add`/`Sub` impls for `Time` and `SystemTime` * [`SystemTimeError`] * [`SystemTimeError::duration`] * Various impls for `SystemTimeError` * [`UNIX_EPOCH`] * [`AddAssign`], [`SubAssign`], [`MulAssign`], [`DivAssign`], [`RemAssign`], [`BitAndAssign`], [`BitOrAssign`], [`BitXorAssign`], [`ShlAssign`], [`ShrAssign`]. * [The `write!` and `writeln!` macros correctly emit errors if any of their arguments can't be formatted][1.8w]. * [Various I/O functions support large files on 32-bit Linux][1.8l]. * [The Unix-specific `raw` modules, which contain a number of redefined C types are deprecated][1.8r], including `os::raw::unix`, `os::raw::macos`, and `os::raw::linux`. These modules defined types such as `ino_t` and `dev_t`. The inconsistency of these definitions across platforms was making it difficult to implement `std` correctly. Those that need these definitions should use the `libc` crate. [RFC 1415]. * The Unix-specific `MetadataExt` traits, including `os::unix::fs::MetadataExt`, which expose values such as inode numbers [no longer return platform-specific types][1.8r], but instead return widened integers. [RFC 1415]. * [`btree_set::{IntoIter, Iter, Range}` are covariant][1.8cv]. * [Atomic loads and stores are not volatile][1.8a]. * [All types in `sync::mpsc` implement `fmt::Debug`][1.8mp]. Performance ----------- * [Inlining hash functions lead to a 3% compile-time improvement in some workloads][1.8h]. * When using jemalloc, its symbols are [unprefixed so that it overrides the libc malloc implementation][1.8h]. This means that for rustc, LLVM is now using jemalloc, which results in a 6% compile-time improvement on a specific workload. * [Avoid quadratic growth in function size due to cleanups][1.8cu]. Misc ---- * [32-bit MSVC builds finally implement unwinding][1.8ms]. i686-pc-windows-msvc is now considered a tier-1 platform. * [The `--print targets` flag prints a list of supported targets][1.8t]. * [The `--print cfg` flag prints the `cfg`s defined for the current target][1.8cf]. * [`rustc` can be built with an new Cargo-based build system, written in Rust][1.8b]. It will eventually replace Rust's Makefile-based build system. To enable it configure with `configure --rustbuild`. * [Errors for non-exhaustive `match` patterns now list up to 3 missing variants while also indicating the total number of missing variants if more than 3][1.8m]. * [Executable stacks are disabled on Linux and BSD][1.8nx]. * The Rust Project now publishes binary releases of the standard library for a number of tier-2 targets: `armv7-unknown-linux-gnueabihf`, `powerpc-unknown-linux-gnu`, `powerpc64-unknown-linux-gnu`, `powerpc64le-unknown-linux-gnu` `x86_64-rumprun-netbsd`. These can be installed with tools such as [multirust][1.8mr]. Cargo ----- * [`cargo init` creates a new Cargo project in the current directory][1.8ci]. It is otherwise like `cargo new`. * [Cargo has configuration keys for `-v` and `--color`][1.8cc]. `verbose` and `color`, respectively, go in the `[term]` section of `.cargo/config`. * [Configuration keys that evaluate to strings or integers can be set via environment variables][1.8ce]. For example the `build.jobs` key can be set via `CARGO_BUILD_JOBS`. Environment variables take precedence over config files. * [Target-specific dependencies support Rust `cfg` syntax for describing targets][1.8cfg] so that dependencies for multiple targets can be specified together. [RFC 1361]. * [The environment variables `CARGO_TARGET_ROOT`, `RUSTC`, and `RUSTDOC` take precedence over the `build.target-dir`, `build.rustc`, and `build.rustdoc` configuration values][1.8cv]. * [The child process tree is killed on Windows when Cargo is killed][1.8ck]. * [The `build.target` configuration value sets the target platform, like `--target`][1.8ct]. Compatibility Notes ------------------- * [Unstable compiler flags have been further restricted][1.8u]. Since 1.0 `-Z` flags have been considered unstable, and other flags that were considered unstable additionally required passing `-Z unstable-options` to access. Unlike unstable language and library features though, these options have been accessible on the stable release channel. Going forward, *new unstable flags will not be available on the stable release channel*, and old unstable flags will warn about their usage. In the future, all unstable flags will be unavailable on the stable release channel. * [It is no longer possible to `match` on empty enum variants using the `Variant(..)` syntax][1.8v]. This has been a warning since 1.6. * The Unix-specific `MetadataExt` traits, including `os::unix::fs::MetadataExt`, which expose values such as inode numbers [no longer return platform-specific types][1.8r], but instead return widened integers. [RFC 1415]. * [Modules sourced from the filesystem cannot appear within arbitrary blocks, but only within other modules][1.8mf]. * [`--cfg` compiler flags are parsed strictly as identifiers][1.8c]. * On Unix, [stack overflow triggers a runtime abort instead of a SIGSEGV][1.8so]. * [`Command::spawn` and its equivalents return an error if any of its command-line arguments contain interior `NUL`s][1.8n]. * [Tuple and unit enum variants from other crates are in the type namespace][1.8tn]. * [On Windows `rustc` emits `.lib` files for the `staticlib` library type instead of `.a` files][1.8st]. Additionally, for the MSVC toolchain, `rustc` emits import libraries named `foo.dll.lib` instead of `foo.lib`. [1.8a]: https://github.com/rust-lang/rust/pull/30962 [1.8b]: https://github.com/rust-lang/rust/pull/31123 [1.8c]: https://github.com/rust-lang/rust/pull/31530 [1.8cc]: https://github.com/rust-lang/cargo/pull/2397 [1.8ce]: https://github.com/rust-lang/cargo/pull/2398 [1.8cf]: https://github.com/rust-lang/rust/pull/31278 [1.8cfg]: https://github.com/rust-lang/cargo/pull/2328 [1.8ci]: https://github.com/rust-lang/cargo/pull/2081 [1.8ck]: https://github.com/rust-lang/cargo/pull/2370 [1.8ct]: https://github.com/rust-lang/cargo/pull/2335 [1.8cu]: https://github.com/rust-lang/rust/pull/31390 [1.8cv]: https://github.com/rust-lang/cargo/issues/2365 [1.8cv]: https://github.com/rust-lang/rust/pull/30998 [1.8h]: https://github.com/rust-lang/rust/pull/31460 [1.8l]: https://github.com/rust-lang/rust/pull/31668 [1.8m]: https://github.com/rust-lang/rust/pull/31020 [1.8mf]: https://github.com/rust-lang/rust/pull/31534 [1.8mp]: https://github.com/rust-lang/rust/pull/30894 [1.8mr]: https://users.rust-lang.org/t/multirust-0-8-with-cross-std-installation/4901 [1.8ms]: https://github.com/rust-lang/rust/pull/30448 [1.8n]: https://github.com/rust-lang/rust/pull/31056 [1.8nx]: https://github.com/rust-lang/rust/pull/30859 [1.8r]: https://github.com/rust-lang/rust/pull/31551 [1.8so]: https://github.com/rust-lang/rust/pull/31333 [1.8st]: https://github.com/rust-lang/rust/pull/29520 [1.8t]: https://github.com/rust-lang/rust/pull/31358 [1.8tn]: https://github.com/rust-lang/rust/pull/30882 [1.8u]: https://github.com/rust-lang/rust/pull/31793 [1.8v]: https://github.com/rust-lang/rust/pull/31757 [1.8w]: https://github.com/rust-lang/rust/pull/31904 [RFC 1361]: https://github.com/rust-lang/rfcs/blob/master/text/1361-cargo-cfg-dependencies.md [RFC 1415]: https://github.com/rust-lang/rfcs/blob/master/text/1415-trim-std-os.md [RFC 218]: https://github.com/rust-lang/rfcs/blob/master/text/0218-empty-struct-with-braces.md [RFC 953]: https://github.com/rust-lang/rfcs/blob/master/text/0953-op-assign.md [`AddAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.AddAssign.html [`BitAndAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitAndAssign.html [`BitOrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitOrAssign.html [`BitXorAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.BitXorAssign.html [`DivAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.DivAssign.html [`Instant::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.duration_since [`Instant::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.elapsed [`Instant::now`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html#method.now [`MulAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.MulAssign.html [`Ref::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.Ref.html#method.map [`RefMut::map`]: http://doc.rust-lang.org/nightly/std/cell/struct.RefMut.html#method.map [`RemAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.RemAssign.html [`ShlAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShlAssign.html [`ShrAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.ShrAssign.html [`SubAssign`]: http://doc.rust-lang.org/nightly/std/ops/trait.SubAssign.html [`SystemTime::duration_since`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.duration_since [`SystemTime::elapsed`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.elapsed [`SystemTime::now`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html#method.now [`SystemTimeError::duration`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html#method.duration [`SystemTimeError`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTimeError.html [`UNIX_EPOCH`]: http://doc.rust-lang.org/nightly/std/time/constant.UNIX_EPOCH.html [`ptr::drop_in_place`]: http://doc.rust-lang.org/nightly/std/ptr/fn.drop_in_place.html [`str::EncodeUtf16`]: http://doc.rust-lang.org/nightly/std/str/struct.EncodeUtf16.html [`str::encode_utf16`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.encode_utf16 [`time::Instant`]: http://doc.rust-lang.org/nightly/std/time/struct.Instant.html [`time::SystemTime`]: http://doc.rust-lang.org/nightly/std/time/struct.SystemTime.html Version 1.7.0 (2016-03-03) ========================== Libraries --------- * Stabilized APIs * `Path` * [`Path::strip_prefix`][] (renamed from relative_from) * [`path::StripPrefixError`][] (new error type returned from strip_prefix) * `Ipv4Addr` * [`Ipv4Addr::is_loopback`] * [`Ipv4Addr::is_private`] * [`Ipv4Addr::is_link_local`] * [`Ipv4Addr::is_multicast`] * [`Ipv4Addr::is_broadcast`] * [`Ipv4Addr::is_documentation`] * `Ipv6Addr` * [`Ipv6Addr::is_unspecified`] * [`Ipv6Addr::is_loopback`] * [`Ipv6Addr::is_multicast`] * `Vec` * [`Vec::as_slice`] * [`Vec::as_mut_slice`] * `String` * [`String::as_str`] * [`String::as_mut_str`] * Slices * `<[T]>::`[`clone_from_slice`], which now requires the two slices to be the same length * `<[T]>::`[`sort_by_key`] * checked, saturated, and overflowing operations * [`i32::checked_rem`], [`i32::checked_neg`], [`i32::checked_shl`], [`i32::checked_shr`] * [`i32::saturating_mul`] * [`i32::overflowing_add`], [`i32::overflowing_sub`], [`i32::overflowing_mul`], [`i32::overflowing_div`] * [`i32::overflowing_rem`], [`i32::overflowing_neg`], [`i32::overflowing_shl`], [`i32::overflowing_shr`] * [`u32::checked_rem`], [`u32::checked_neg`], [`u32::checked_shl`], [`u32::checked_shl`] * [`u32::saturating_mul`] * [`u32::overflowing_add`], [`u32::overflowing_sub`], [`u32::overflowing_mul`], [`u32::overflowing_div`] * [`u32::overflowing_rem`], [`u32::overflowing_neg`], [`u32::overflowing_shl`], [`u32::overflowing_shr`] * and checked, saturated, and overflowing operations for other primitive types * FFI * [`ffi::IntoStringError`] * [`CString::into_string`] * [`CString::into_bytes`] * [`CString::into_bytes_with_nul`] * `From for Vec` * `IntoStringError` * [`IntoStringError::into_cstring`] * [`IntoStringError::utf8_error`] * `Error for IntoStringError` * Hashing * [`std::hash::BuildHasher`] * [`BuildHasher::Hasher`] * [`BuildHasher::build_hasher`] * [`std::hash::BuildHasherDefault`] * [`HashMap::with_hasher`] * [`HashMap::with_capacity_and_hasher`] * [`HashSet::with_hasher`] * [`HashSet::with_capacity_and_hasher`] * [`std::collections::hash_map::RandomState`] * [`RandomState::new`] * [Validating UTF-8 is faster by a factor of between 7 and 14x for ASCII input][1.7utf8]. This means that creating `String`s and `str`s from bytes is faster. * [The performance of `LineWriter` (and thus `io::stdout`) was improved by using `memchr` to search for newlines][1.7m]. * [`f32::to_degrees` and `f32::to_radians` are stable][1.7f]. The `f64` variants were stabilized previously. * [`BTreeMap` was rewritten to use less memory and improve the performance of insertion and iteration, the latter by as much as 5x][1.7bm]. * [`BTreeSet` and its iterators, `Iter`, `IntoIter`, and `Range` are covariant over their contained type][1.7bt]. * [`LinkedList` and its iterators, `Iter` and `IntoIter` are covariant over their contained type][1.7ll]. * [`str::replace` now accepts a `Pattern`][1.7rp], like other string searching methods. * [`Any` is implemented for unsized types][1.7a]. * [`Hash` is implemented for `Duration`][1.7h]. Misc ---- * [When running tests with `--test`, rustdoc will pass `--cfg` arguments to the compiler][1.7dt]. * [The compiler is built with RPATH information by default][1.7rpa]. This means that it will be possible to run `rustc` when installed in unusual configurations without configuring the dynamic linker search path explicitly. * [`rustc` passes `--enable-new-dtags` to GNU ld][1.7dta]. This makes any RPATH entries (emitted with `-C rpath`) *not* take precedence over `LD_LIBRARY_PATH`. Cargo ----- * [`cargo rustc` accepts a `--profile` flag that runs `rustc` under any of the compilation profiles, 'dev', 'bench', or 'test'][1.7cp]. * [The `rerun-if-changed` build script directive no longer causes the build script to incorrectly run twice in certain scenarios][1.7rr]. Compatibility Notes ------------------- * Soundness fixes to the interactions between associated types and lifetimes, specified in [RFC 1214], [now generate errors][1.7sf] for code that violates the new rules. This is a significant change that is known to break existing code, so it has emitted warnings for the new error cases since 1.4 to give crate authors time to adapt. The details of what is changing are subtle; read the RFC for more. * [Several bugs in the compiler's visibility calculations were fixed][1.7v]. Since this was found to break significant amounts of code, the new errors will be emitted as warnings for several release cycles, under the `private_in_public` lint. * Defaulted type parameters were accidentally accepted in positions that were not intended. In this release, [defaulted type parameters appearing outside of type definitions will generate a warning][1.7d], which will become an error in future releases. * [Parsing "." as a float results in an error instead of 0][1.7p]. That is, `".".parse::()` returns `Err`, not `Ok(0.0)`. * [Borrows of closure parameters may not outlive the closure][1.7bc]. [1.7a]: https://github.com/rust-lang/rust/pull/30928 [1.7bc]: https://github.com/rust-lang/rust/pull/30341 [1.7bm]: https://github.com/rust-lang/rust/pull/30426 [1.7bt]: https://github.com/rust-lang/rust/pull/30998 [1.7cp]: https://github.com/rust-lang/cargo/pull/2224 [1.7d]: https://github.com/rust-lang/rust/pull/30724 [1.7dt]: https://github.com/rust-lang/rust/pull/30372 [1.7dta]: https://github.com/rust-lang/rust/pull/30394 [1.7f]: https://github.com/rust-lang/rust/pull/30672 [1.7h]: https://github.com/rust-lang/rust/pull/30818 [1.7ll]: https://github.com/rust-lang/rust/pull/30663 [1.7m]: https://github.com/rust-lang/rust/pull/30381 [1.7p]: https://github.com/rust-lang/rust/pull/30681 [1.7rp]: https://github.com/rust-lang/rust/pull/29498 [1.7rpa]: https://github.com/rust-lang/rust/pull/30353 [1.7rr]: https://github.com/rust-lang/cargo/pull/2279 [1.7sf]: https://github.com/rust-lang/rust/pull/30389 [1.7utf8]: https://github.com/rust-lang/rust/pull/30740 [1.7v]: https://github.com/rust-lang/rust/pull/29973 [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md [`BuildHasher::Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html [`BuildHasher::build_hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html#tymethod.build_hasher [`CString::into_bytes_with_nul`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes_with_nul [`CString::into_bytes`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes [`CString::into_string`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_string [`HashMap::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_capacity_and_hasher [`HashMap::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_hasher [`HashSet::with_capacity_and_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_capacity_and_hasher [`HashSet::with_hasher`]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_hasher [`IntoStringError::into_cstring`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.into_cstring [`IntoStringError::utf8_error`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.utf8_error [`Ipv4Addr::is_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_broadcast [`Ipv4Addr::is_documentation`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_documentation [`Ipv4Addr::is_link_local`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_link_local [`Ipv4Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_loopback [`Ipv4Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_multicast [`Ipv4Addr::is_private`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_private [`Ipv6Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_loopback [`Ipv6Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_multicast [`Ipv6Addr::is_unspecified`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_unspecified [`Path::strip_prefix`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.strip_prefix [`RandomState::new`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html#method.new [`String::as_mut_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_mut_str [`String::as_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_str [`Vec::as_mut_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_mut_slice [`Vec::as_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_slice [`clone_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.clone_from_slice [`ffi::IntoStringError`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html [`i32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_neg [`i32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_rem [`i32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shl [`i32::checked_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shr [`i32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_add [`i32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_div [`i32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_mul [`i32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_neg [`i32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_rem [`i32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shl [`i32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shr [`i32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_sub [`i32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.saturating_mul [`path::StripPrefixError`]: http://doc.rust-lang.org/nightly/std/path/struct.StripPrefixError.html [`sort_by_key`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.sort_by_key [`std::collections::hash_map::RandomState`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html [`std::hash::BuildHasherDefault`]: http://doc.rust-lang.org/nightly/std/hash/struct.BuildHasherDefault.html [`std::hash::BuildHasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg [`u32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_rem [`u32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg [`u32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_shl [`u32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_add [`u32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_div [`u32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_mul [`u32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_neg [`u32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_rem [`u32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shl [`u32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shr [`u32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_sub [`u32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.saturating_mul Version 1.6.0 (2016-01-21) ========================== Language -------- * The `#![no_std]` attribute causes a crate to not be linked to the standard library, but only the [core library][1.6co], as described in [RFC 1184]. The core library defines common types and traits but has no platform dependencies whatsoever, and is the basis for Rust software in environments that cannot support a full port of the standard library, such as operating systems. Most of the core library is now stable. Libraries --------- * Stabilized APIs: [`Read::read_exact`], [`ErrorKind::UnexpectedEof`][] (renamed from `UnexpectedEOF`), [`fs::DirBuilder`], [`fs::DirBuilder::new`], [`fs::DirBuilder::recursive`], [`fs::DirBuilder::create`], [`os::unix::fs::DirBuilderExt`], [`os::unix::fs::DirBuilderExt::mode`], [`vec::Drain`], [`vec::Vec::drain`], [`string::Drain`], [`string::String::drain`], [`vec_deque::Drain`], [`vec_deque::VecDeque::drain`], [`collections::hash_map::Drain`], [`collections::hash_map::HashMap::drain`], [`collections::hash_set::Drain`], [`collections::hash_set::HashSet::drain`], [`collections::binary_heap::Drain`], [`collections::binary_heap::BinaryHeap::drain`], [`Vec::extend_from_slice`][] (renamed from `push_all`), [`Mutex::get_mut`], [`Mutex::into_inner`], [`RwLock::get_mut`], [`RwLock::into_inner`], [`Iterator::min_by_key`][] (renamed from `min_by`), [`Iterator::max_by_key`][] (renamed from `max_by`). * The [core library][1.6co] is stable, as are most of its APIs. * [The `assert_eq!` macro supports arguments that don't implement `Sized`][1.6ae], such as arrays. In this way it behaves more like `assert!`. * Several timer functions that take duration in milliseconds [are deprecated in favor of those that take `Duration`][1.6ms]. These include `Condvar::wait_timeout_ms`, `thread::sleep_ms`, and `thread::park_timeout_ms`. * The algorithm by which `Vec` reserves additional elements was [tweaked to not allocate excessive space][1.6a] while still growing exponentially. * `From` conversions are [implemented from integers to floats][1.6f] in cases where the conversion is lossless. Thus they are not implemented for 32-bit ints to `f32`, nor for 64-bit ints to `f32` or `f64`. They are also not implemented for `isize` and `usize` because the implementations would be platform-specific. `From` is also implemented from `f32` to `f64`. * `From<&Path>` and `From` are implemented for `Cow`. * `From` is implemented for `Box`, `Rc` and `Arc`. * `IntoIterator` is implemented for `&PathBuf` and `&Path`. * [`BinaryHeap` was refactored][1.6bh] for modest performance improvements. * Sorting slices that are already sorted [is 50% faster in some cases][1.6s]. Cargo ----- * Cargo will look in `$CARGO_HOME/bin` for subcommands [by default][1.6c]. * Cargo build scripts can specify their dependencies by emitting the [`rerun-if-changed`][1.6rr] key. * crates.io will reject publication of crates with dependencies that have a wildcard version constraint. Crates with wildcard dependencies were seen to cause a variety of problems, as described in [RFC 1241]. Since 1.5 publication of such crates has emitted a warning. * `cargo clean` [accepts a `--release` flag][1.6cc] to clean the release folder. A variety of artifacts that Cargo failed to clean are now correctly deleted. Misc ---- * The `unreachable_code` lint [warns when a function call's argument diverges][1.6dv]. * The parser indicates [failures that may be caused by confusingly-similar Unicode characters][1.6uc] * Certain macro errors [are reported at definition time][1.6m], not expansion. Compatibility Notes ------------------- * The compiler no longer makes use of the [`RUST_PATH`][1.6rp] environment variable when locating crates. This was a pre-cargo feature for integrating with the package manager that was accidentally never removed. * [A number of bugs were fixed in the privacy checker][1.6p] that could cause previously-accepted code to break. * [Modules and unit/tuple structs may not share the same name][1.6ts]. * [Bugs in pattern matching unit structs were fixed][1.6us]. The tuple struct pattern syntax (`Foo(..)`) can no longer be used to match unit structs. This is a warning now, but will become an error in future releases. Patterns that share the same name as a const are now an error. * A bug was fixed that causes [rustc not to apply default type parameters][1.6xc] when resolving certain method implementations of traits defined in other crates. [1.6a]: https://github.com/rust-lang/rust/pull/29454 [1.6ae]: https://github.com/rust-lang/rust/pull/29770 [1.6bh]: https://github.com/rust-lang/rust/pull/29811 [1.6c]: https://github.com/rust-lang/cargo/pull/2192 [1.6cc]: https://github.com/rust-lang/cargo/pull/2131 [1.6co]: http://doc.rust-lang.org/beta/core/index.html [1.6dv]: https://github.com/rust-lang/rust/pull/30000 [1.6f]: https://github.com/rust-lang/rust/pull/29129 [1.6m]: https://github.com/rust-lang/rust/pull/29828 [1.6ms]: https://github.com/rust-lang/rust/pull/29604 [1.6p]: https://github.com/rust-lang/rust/pull/29726 [1.6rp]: https://github.com/rust-lang/rust/pull/30034 [1.6rr]: https://github.com/rust-lang/cargo/pull/2134 [1.6s]: https://github.com/rust-lang/rust/pull/29675 [1.6ts]: https://github.com/rust-lang/rust/issues/21546 [1.6uc]: https://github.com/rust-lang/rust/pull/29837 [1.6us]: https://github.com/rust-lang/rust/pull/29383 [1.6xc]: https://github.com/rust-lang/rust/issues/30123 [RFC 1184]: https://github.com/rust-lang/rfcs/blob/master/text/1184-stabilize-no_std.md [RFC 1241]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md [`ErrorKind::UnexpectedEof`]: http://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html#variant.UnexpectedEof [`Iterator::max_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.max_by_key [`Iterator::min_by_key`]: http://doc.rust-lang.org/nightly/std/iter/trait.Iterator.html#method.min_by_key [`Mutex::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.get_mut [`Mutex::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html#method.into_inner [`Read::read_exact`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_exact [`RwLock::get_mut`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.get_mut [`RwLock::into_inner`]: http://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html#method.into_inner [`Vec::extend_from_slice`]: http://doc.rust-lang.org/nightly/collections/vec/struct.Vec.html#method.extend_from_slice [`collections::binary_heap::BinaryHeap::drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.BinaryHeap.html#method.drain [`collections::binary_heap::Drain`]: http://doc.rust-lang.org/nightly/std/collections/binary_heap/struct.Drain.html [`collections::hash_map::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.Drain.html [`collections::hash_map::HashMap::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.HashMap.html#method.drain [`collections::hash_set::Drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.Drain.html [`collections::hash_set::HashSet::drain`]: http://doc.rust-lang.org/nightly/std/collections/hash_set/struct.HashSet.html#method.drain [`fs::DirBuilder::create`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.create [`fs::DirBuilder::new`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.new [`fs::DirBuilder::recursive`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html#method.recursive [`fs::DirBuilder`]: http://doc.rust-lang.org/nightly/std/fs/struct.DirBuilder.html [`os::unix::fs::DirBuilderExt::mode`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html#tymethod.mode [`os::unix::fs::DirBuilderExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.DirBuilderExt.html [`string::Drain`]: http://doc.rust-lang.org/nightly/std/string/struct.Drain.html [`string::String::drain`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.drain [`vec::Drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Drain.html [`vec::Vec::drain`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.drain [`vec_deque::Drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.Drain.html [`vec_deque::VecDeque::drain`]: http://doc.rust-lang.org/nightly/std/collections/vec_deque/struct.VecDeque.html#method.drain Version 1.5.0 (2015-12-10) ========================== * ~700 changes, numerous bugfixes Highlights ---------- * Stabilized APIs: [`BinaryHeap::from`], [`BinaryHeap::into_sorted_vec`], [`BinaryHeap::into_vec`], [`Condvar::wait_timeout`], [`FileTypeExt::is_block_device`], [`FileTypeExt::is_char_device`], [`FileTypeExt::is_fifo`], [`FileTypeExt::is_socket`], [`FileTypeExt`], [`Formatter::alternate`], [`Formatter::fill`], [`Formatter::precision`], [`Formatter::sign_aware_zero_pad`], [`Formatter::sign_minus`], [`Formatter::sign_plus`], [`Formatter::width`], [`Iterator::cmp`], [`Iterator::eq`], [`Iterator::ge`], [`Iterator::gt`], [`Iterator::le`], [`Iterator::lt`], [`Iterator::ne`], [`Iterator::partial_cmp`], [`Path::canonicalize`], [`Path::exists`], [`Path::is_dir`], [`Path::is_file`], [`Path::metadata`], [`Path::read_dir`], [`Path::read_link`], [`Path::symlink_metadata`], [`Utf8Error::valid_up_to`], [`Vec::resize`], [`VecDeque::as_mut_slices`], [`VecDeque::as_slices`], [`VecDeque::insert`], [`VecDeque::shrink_to_fit`], [`VecDeque::swap_remove_back`], [`VecDeque::swap_remove_front`], [`slice::split_first_mut`], [`slice::split_first`], [`slice::split_last_mut`], [`slice::split_last`], [`char::from_u32_unchecked`], [`fs::canonicalize`], [`str::MatchIndices`], [`str::RMatchIndices`], [`str::match_indices`], [`str::rmatch_indices`], [`str::slice_mut_unchecked`], [`string::ParseError`]. * Rust applications hosted on crates.io can be installed locally to `~/.cargo/bin` with the [`cargo install`] command. Among other things this makes it easier to augment Cargo with new subcommands: when a binary named e.g. `cargo-foo` is found in `$PATH` it can be invoked as `cargo foo`. * Crates with wildcard (`*`) dependencies will [emit warnings when published][1.5w]. In 1.6 it will no longer be possible to publish crates with wildcard dependencies. Breaking Changes ---------------- * The rules determining when a particular lifetime must outlive a particular value (known as '[dropck]') have been [modified to not rely on parametricity][1.5p]. * [Implementations of `AsRef` and `AsMut` were added to `Box`, `Rc`, and `Arc`][1.5a]. Because these smart pointer types implement `Deref`, this causes breakage in cases where the interior type contains methods of the same name. * [Correct a bug in Rc/Arc][1.5c] that caused [dropck] to be unaware that they could drop their content. Soundness fix. * All method invocations are [properly checked][1.5wf1] for [well-formedness][1.5wf2]. Soundness fix. * Traits whose supertraits contain `Self` are [not object safe][1.5o]. Soundness fix. * Target specifications support a [`no_default_libraries`][1.5nd] setting that controls whether `-nodefaultlibs` is passed to the linker, and in turn the `is_like_windows` setting no longer affects the `-nodefaultlibs` flag. * `#[derive(Show)]`, long-deprecated, [has been removed][1.5ds]. * The `#[inline]` and `#[repr]` attributes [can only appear in valid locations][1.5at]. * Native libraries linked from the local crate are [passed to the linker before native libraries from upstream crates][1.5nl]. * Two rarely-used attributes, `#[no_debug]` and `#[omit_gdb_pretty_printer_section]` [are feature gated][1.5fg]. * Negation of unsigned integers, which has been a warning for several releases, [is now behind a feature gate and will generate errors][1.5nu]. * The parser accidentally accepted visibility modifiers on enum variants, a bug [which has been fixed][1.5ev]. * [A bug was fixed that allowed `use` statements to import unstable features][1.5use]. Language -------- * When evaluating expressions at compile-time that are not compile-time constants (const-evaluating expressions in non-const contexts), incorrect code such as overlong bitshifts and arithmetic overflow will [generate a warning instead of an error][1.5ce], delaying the error until runtime. This will allow the const-evaluator to be expanded in the future backwards-compatibly. * The `improper_ctypes` lint [no longer warns about using `isize` and `usize` in FFI][1.5ict]. Libraries --------- * `Arc` and `Rc` are [covariant with respect to `T` instead of invariant][1.5c]. * `Default` is [implemented for mutable slices][1.5d]. * `FromStr` is [implemented for `SockAddrV4` and `SockAddrV6`][1.5s]. * There are now `From` conversions [between floating point types][1.5f] where the conversions are lossless. * Thera are now `From` conversions [between integer types][1.5i] where the conversions are lossless. * [`fs::Metadata` implements `Clone`][1.5fs]. * The `parse` method [accepts a leading "+" when parsing integers][1.5pi]. * [`AsMut` is implemented for `Vec`][1.5am]. * The `clone_from` implementations for `String` and `BinaryHeap` [have been optimized][1.5cf] and no longer rely on the default impl. * The `extern "Rust"`, `extern "C"`, `unsafe extern "Rust"` and `unsafe extern "C"` function types now [implement `Clone`, `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Hash`, `fmt::Pointer`, and `fmt::Debug` for up to 12 arguments][1.5fp]. * [Dropping `Vec`s is much faster in unoptimized builds when the element types don't implement `Drop`][1.5dv]. * A bug that caused in incorrect behavior when [combining `VecDeque` with zero-sized types][1.5vdz] was resolved. * [`PartialOrd` for slices is faster][1.5po]. Miscellaneous ------------- * [Crate metadata size was reduced by 20%][1.5md]. * [Improvements to code generation reduced the size of libcore by 3.3 MB and rustc's memory usage by 18MB][1.5m]. * [Improvements to deref translation increased performance in unoptimized builds][1.5dr]. * Various errors in trait resolution [are deduplicated to only be reported once][1.5te]. * Rust has preliminary [support for rumprun kernels][1.5rr]. * Rust has preliminary [support for NetBSD on amd64][1.5na]. [1.5use]: https://github.com/rust-lang/rust/pull/28364 [1.5po]: https://github.com/rust-lang/rust/pull/28436 [1.5ev]: https://github.com/rust-lang/rust/pull/28442 [1.5nu]: https://github.com/rust-lang/rust/pull/28468 [1.5dr]: https://github.com/rust-lang/rust/pull/28491 [1.5vdz]: https://github.com/rust-lang/rust/pull/28494 [1.5md]: https://github.com/rust-lang/rust/pull/28521 [1.5fg]: https://github.com/rust-lang/rust/pull/28522 [1.5dv]: https://github.com/rust-lang/rust/pull/28531 [1.5na]: https://github.com/rust-lang/rust/pull/28543 [1.5fp]: https://github.com/rust-lang/rust/pull/28560 [1.5rr]: https://github.com/rust-lang/rust/pull/28593 [1.5cf]: https://github.com/rust-lang/rust/pull/28602 [1.5nl]: https://github.com/rust-lang/rust/pull/28605 [1.5te]: https://github.com/rust-lang/rust/pull/28645 [1.5at]: https://github.com/rust-lang/rust/pull/28650 [1.5am]: https://github.com/rust-lang/rust/pull/28663 [1.5m]: https://github.com/rust-lang/rust/pull/28778 [1.5ict]: https://github.com/rust-lang/rust/pull/28779 [1.5a]: https://github.com/rust-lang/rust/pull/28811 [1.5pi]: https://github.com/rust-lang/rust/pull/28826 [1.5ce]: https://github.com/rust-lang/rfcs/blob/master/text/1229-compile-time-asserts.md [1.5p]: https://github.com/rust-lang/rfcs/blob/master/text/1238-nonparametric-dropck.md [1.5i]: https://github.com/rust-lang/rust/pull/28921 [1.5fs]: https://github.com/rust-lang/rust/pull/29021 [1.5f]: https://github.com/rust-lang/rust/pull/29129 [1.5ds]: https://github.com/rust-lang/rust/pull/29148 [1.5s]: https://github.com/rust-lang/rust/pull/29190 [1.5d]: https://github.com/rust-lang/rust/pull/29245 [1.5o]: https://github.com/rust-lang/rust/pull/29259 [1.5nd]: https://github.com/rust-lang/rust/pull/28578 [1.5wf2]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md [1.5wf1]: https://github.com/rust-lang/rust/pull/28669 [dropck]: https://doc.rust-lang.org/nightly/nomicon/dropck.html [1.5c]: https://github.com/rust-lang/rust/pull/29110 [1.5w]: https://github.com/rust-lang/rfcs/blob/master/text/1241-no-wildcard-deps.md [`cargo install`]: https://github.com/rust-lang/rfcs/blob/master/text/1200-cargo-install.md [`BinaryHeap::from`]: http://doc.rust-lang.org/nightly/std/convert/trait.From.html#method.from [`BinaryHeap::into_sorted_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_sorted_vec [`BinaryHeap::into_vec`]: http://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html#method.into_vec [`Condvar::wait_timeout`]: http://doc.rust-lang.org/nightly/std/sync/struct.Condvar.html#method.wait_timeout [`FileTypeExt::is_block_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_block_device [`FileTypeExt::is_char_device`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_char_device [`FileTypeExt::is_fifo`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_fifo [`FileTypeExt::is_socket`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html#tymethod.is_socket [`FileTypeExt`]: http://doc.rust-lang.org/nightly/std/os/unix/fs/trait.FileTypeExt.html [`Formatter::alternate`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.alternate [`Formatter::fill`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.fill [`Formatter::precision`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.precision [`Formatter::sign_aware_zero_pad`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_aware_zero_pad [`Formatter::sign_minus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_minus [`Formatter::sign_plus`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.sign_plus [`Formatter::width`]: http://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.width [`Iterator::cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.cmp [`Iterator::eq`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.eq [`Iterator::ge`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ge [`Iterator::gt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.gt [`Iterator::le`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.le [`Iterator::lt`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.lt [`Iterator::ne`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.ne [`Iterator::partial_cmp`]: http://doc.rust-lang.org/nightly/core/iter/trait.Iterator.html#method.partial_cmp [`Path::canonicalize`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.canonicalize [`Path::exists`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.exists [`Path::is_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_dir [`Path::is_file`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.is_file [`Path::metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.metadata [`Path::read_dir`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_dir [`Path::read_link`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.read_link [`Path::symlink_metadata`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.symlink_metadata [`Utf8Error::valid_up_to`]: http://doc.rust-lang.org/nightly/core/str/struct.Utf8Error.html#method.valid_up_to [`Vec::resize`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.resize [`VecDeque::as_mut_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_mut_slices [`VecDeque::as_slices`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.as_slices [`VecDeque::insert`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.insert [`VecDeque::shrink_to_fit`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.shrink_to_fit [`VecDeque::swap_remove_back`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_back [`VecDeque::swap_remove_front`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.swap_remove_front [`slice::split_first_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first_mut [`slice::split_first`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_first [`slice::split_last_mut`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last_mut [`slice::split_last`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_last [`char::from_u32_unchecked`]: http://doc.rust-lang.org/nightly/std/char/fn.from_u32_unchecked.html [`fs::canonicalize`]: http://doc.rust-lang.org/nightly/std/fs/fn.canonicalize.html [`str::MatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.MatchIndices.html [`str::RMatchIndices`]: http://doc.rust-lang.org/nightly/std/str/struct.RMatchIndices.html [`str::match_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.match_indices [`str::rmatch_indices`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatch_indices [`str::slice_mut_unchecked`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.slice_mut_unchecked [`string::ParseError`]: http://doc.rust-lang.org/nightly/std/string/enum.ParseError.html Version 1.4.0 (2015-10-29) ========================== * ~1200 changes, numerous bugfixes Highlights ---------- * Windows builds targeting the 64-bit MSVC ABI and linker (instead of GNU) are now supported and recommended for use. Breaking Changes ---------------- * [Several changes have been made to fix type soundness and improve the behavior of associated types][sound]. See [RFC 1214]. Although we have mostly introduced these changes as warnings this release, to become errors next release, there are still some scenarios that will see immediate breakage. * [The `str::lines` and `BufRead::lines` iterators treat `\r\n` as line breaks in addition to `\n`][crlf]. * [Loans of `'static` lifetime extend to the end of a function][stat]. * [`str::parse` no longer introduces avoidable rounding error when parsing floating point numbers. Together with earlier changes to float formatting/output, "round trips" like f.to_string().parse() now preserve the value of f exactly. Additionally, leading plus signs are now accepted][fp3]. Language -------- * `use` statements that import multiple items [can now rename them][i], as in `use foo::{bar as kitten, baz as puppy}`. * [Binops work correctly on fat pointers][binfat]. * `pub extern crate`, which does not behave as expected, [issues a warning][pec] until a better solution is found. Libraries --------- * [Many APIs were stabilized][stab]: `>::into_string`, [`Arc::downgrade`], [`Arc::get_mut`], [`Arc::make_mut`], [`Arc::try_unwrap`], [`Box::from_raw`], [`Box::into_raw`], [`CStr::to_str`], [`CStr::to_string_lossy`], [`CString::from_raw`], [`CString::into_raw`], [`IntoRawFd::into_raw_fd`], [`IntoRawFd`], `IntoRawHandle::into_raw_handle`, `IntoRawHandle`, `IntoRawSocket::into_raw_socket`, `IntoRawSocket`, [`Rc::downgrade`], [`Rc::get_mut`], [`Rc::make_mut`], [`Rc::try_unwrap`], [`Result::expect`], [`String::into_boxed_str`], [`TcpStream::read_timeout`], [`TcpStream::set_read_timeout`], [`TcpStream::set_write_timeout`], [`TcpStream::write_timeout`], [`UdpSocket::read_timeout`], [`UdpSocket::set_read_timeout`], [`UdpSocket::set_write_timeout`], [`UdpSocket::write_timeout`], `Vec::append`, `Vec::split_off`, [`VecDeque::append`], [`VecDeque::retain`], [`VecDeque::split_off`], [`rc::Weak::upgrade`], [`rc::Weak`], [`slice::Iter::as_slice`], [`slice::IterMut::into_slice`], [`str::CharIndices::as_str`], [`str::Chars::as_str`], [`str::split_at_mut`], [`str::split_at`], [`sync::Weak::upgrade`], [`sync::Weak`], [`thread::park_timeout`], [`thread::sleep`]. * [Some APIs were deprecated][dep]: `BTreeMap::with_b`, `BTreeSet::with_b`, `Option::as_mut_slice`, `Option::as_slice`, `Result::as_mut_slice`, `Result::as_slice`, `f32::from_str_radix`, `f64::from_str_radix`. * [Reverse-searching strings is faster with the 'two-way' algorithm][s]. * [`std::io::copy` allows `?Sized` arguments][cc]. * The `Windows`, `Chunks`, and `ChunksMut` iterators over slices all [override `count`, `nth` and `last` with an O(1) implementation][it]. * [`Default` is implemented for arrays up to `[T; 32]`][d]. * [`IntoRawFd` has been added to the Unix-specific prelude, `IntoRawSocket` and `IntoRawHandle` to the Windows-specific prelude][pr]. * [`Extend` and `FromIterator` where `T: Copy`][ext] as part of [RFC 839]. This will cause type inferance breakage in rare situations. * [`BinaryHeap` implements `Debug`][bh2]. * [`Borrow` and `BorrowMut` are implemented for fixed-size arrays][bm]. * [`extern fn`s with the "Rust" and "C" ABIs implement common traits including `Eq`, `Ord`, `Debug`, `Hash`][fp]. * [String comparison is faster][faststr]. * `&mut T` where `T: std::fmt::Write` [also implements `std::fmt::Write`][mutw]. * [A stable regression in `VecDeque::push_back` and other capicity-altering methods that caused panics for zero-sized types was fixed][vd]. * [Function pointers implement traits for up to 12 parameters][fp2]. Miscellaneous ------------- * The compiler [no longer uses the 'morestack' feature to prevent stack overflow][mm]. Instead it uses guard pages and stack probes (though stack probes are not yet implemented on any platform but Windows). * [The compiler matches traits faster when projections are involved][p]. * The 'improper_ctypes' lint [no longer warns about use of `isize` and `usize`][ffi]. * [Cargo now displays useful information about what its doing during `cargo update`][cu]. [`Arc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.downgrade [`Arc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.make_mut [`Arc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.get_mut [`Arc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/arc/struct.Arc.html#method.try_unwrap [`Box::from_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.from_raw [`Box::into_raw`]: http://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html#method.into_raw [`CStr::to_str`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_str [`CStr::to_string_lossy`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html#method.to_string_lossy [`CString::from_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.from_raw [`CString::into_raw`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_raw [`IntoRawFd::into_raw_fd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html#tymethod.into_raw_fd [`IntoRawFd`]: http://doc.rust-lang.org/nightly/std/os/unix/io/trait.IntoRawFd.html [`Rc::downgrade`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.downgrade [`Rc::get_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.get_mut [`Rc::make_mut`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.make_mut [`Rc::try_unwrap`]: http://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html#method.try_unwrap [`Result::expect`]: http://doc.rust-lang.org/nightly/core/result/enum.Result.html#method.expect [`String::into_boxed_str`]: http://doc.rust-lang.org/nightly/collections/string/struct.String.html#method.into_boxed_str [`TcpStream::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout [`TcpStream::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout [`TcpStream::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout [`TcpStream::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout [`UdpSocket::read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.read_timeout [`UdpSocket::set_read_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_read_timeout [`UdpSocket::write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.write_timeout [`UdpSocket::set_write_timeout`]: http://doc.rust-lang.org/nightly/std/net/struct.TcpStream.html#method.set_write_timeout [`VecDeque::append`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.append [`VecDeque::retain`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.retain [`VecDeque::split_off`]: http://doc.rust-lang.org/nightly/std/collections/struct.VecDeque.html#method.split_off [`rc::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html#method.upgrade [`rc::Weak`]: http://doc.rust-lang.org/nightly/std/rc/struct.Weak.html [`slice::Iter::as_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.Iter.html#method.as_slice [`slice::IterMut::into_slice`]: http://doc.rust-lang.org/nightly/std/slice/struct.IterMut.html#method.into_slice [`str::CharIndices::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.CharIndices.html#method.as_str [`str::Chars::as_str`]: http://doc.rust-lang.org/nightly/std/str/struct.Chars.html#method.as_str [`str::split_at_mut`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at_mut [`str::split_at`]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at [`sync::Weak::upgrade`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html#method.upgrade [`sync::Weak`]: http://doc.rust-lang.org/nightly/std/sync/struct.Weak.html [`thread::park_timeout`]: http://doc.rust-lang.org/nightly/std/thread/fn.park_timeout.html [`thread::sleep`]: http://doc.rust-lang.org/nightly/std/thread/fn.sleep.html [bh2]: https://github.com/rust-lang/rust/pull/28156 [binfat]: https://github.com/rust-lang/rust/pull/28270 [bm]: https://github.com/rust-lang/rust/pull/28197 [cc]: https://github.com/rust-lang/rust/pull/27531 [crlf]: https://github.com/rust-lang/rust/pull/28034 [cu]: https://github.com/rust-lang/cargo/pull/1931 [d]: https://github.com/rust-lang/rust/pull/27825 [dep]: https://github.com/rust-lang/rust/pull/28339 [es]: https://github.com/rust-lang/rust/pull/27956 [ext]: https://github.com/rust-lang/rust/pull/28094 [faststr]: https://github.com/rust-lang/rust/pull/28338 [ffi]: https://github.com/rust-lang/rust/pull/28779 [fp]: https://github.com/rust-lang/rust/pull/28268 [fp2]: https://github.com/rust-lang/rust/pull/28560 [fp3]: https://github.com/rust-lang/rust/pull/27307 [i]: https://github.com/rust-lang/rust/pull/27451 [into2]: https://github.com/rust-lang/rust/pull/28039 [it]: https://github.com/rust-lang/rust/pull/27652 [mm]: https://github.com/rust-lang/rust/pull/27338 [mutw]: https://github.com/rust-lang/rust/pull/28368 [sound]: https://github.com/rust-lang/rust/pull/27641 [p]: https://github.com/rust-lang/rust/pull/27866 [pec]: https://github.com/rust-lang/rust/pull/28486 [pr]: https://github.com/rust-lang/rust/pull/27896 [RFC 839]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md [RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md [s]: https://github.com/rust-lang/rust/pull/27474 [stab]: https://github.com/rust-lang/rust/pull/28339 [stat]: https://github.com/rust-lang/rust/pull/28321 [vd]: https://github.com/rust-lang/rust/pull/28494 Version 1.3.0 (2015-09-17) ============================== * ~900 changes, numerous bugfixes Highlights ---------- * The [new object lifetime defaults][nold] have been [turned on][nold2] after a cycle of warnings about the change. Now types like `&'a Box` (or `&'a Rc`, etc) will change from being interpreted as `&'a Box` to `&'a Box`. * [The Rustonomicon][nom] is a new book in the official documentation that dives into writing unsafe Rust. * The [`Duration`] API, [has been stabilized][ds]. This basic unit of timekeeping is employed by other std APIs, as well as out-of-tree time crates. Breaking Changes ---------------- * The [new object lifetime defaults][nold] have been [turned on][nold2] after a cycle of warnings about the change. * There is a known [regression][lr] in how object lifetime elision is interpreted, the proper solution for which is undetermined. * The `#[prelude_import]` attribute, an internal implementation detail, was accidentally stabilized previously. [It has been put behind the `prelude_import` feature gate][pi]. This change is believed to break no existing code. * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is [more sane for dynamically sized types][dst3]. Code that relied on the previous behavior is thought to be broken. * The `dropck` rules, which checks that destructors can't access destroyed values, [have been updated][dropck] to match the [RFC][dropckrfc]. This fixes some soundness holes, and as such will cause some previously-compiling code to no longer build. Language -------- * The [new object lifetime defaults][nold] have been [turned on][nold2] after a cycle of warnings about the change. * Semicolons may [now follow types and paths in macros](https://github.com/rust-lang/rust/pull/27000). * The behavior of [`size_of_val`][dst1] and [`align_of_val`][dst2] is [more sane for dynamically sized types][dst3]. Code that relied on the previous behavior is not known to exist, and suspected to be broken. * `'static` variables [may now be recursive][st]. * `ref` bindings choose between [`Deref`] and [`DerefMut`] implementations correctly. * The `dropck` rules, which checks that destructors can't access destroyed values, [have been updated][dropck] to match the [RFC][dropckrfc]. Libraries --------- * The [`Duration`] API, [has been stabilized][ds], as well as the `std::time` module, which presently contains only `Duration`. * `Box` and `Box<[T]>` both implement `Clone`. * The owned C string, [`CString`], implements [`Borrow`] and the borrowed C string, [`CStr`], implements [`ToOwned`]. The two of these allow C strings to be borrowed and cloned in generic code. * [`CStr`] implements [`Debug`]. * [`AtomicPtr`] implements [`Debug`]. * [`Error`] trait objects [can be downcast to their concrete types][e] in many common configurations, using the [`is`], [`downcast`], [`downcast_ref`] and [`downcast_mut`] methods, similarly to the [`Any`] trait. * Searching for substrings now [employs the two-way algorithm][search] instead of doing a naive search. This gives major speedups to a number of methods, including [`contains`][sc], [`find`][sf], [`rfind`][srf], [`split`][ss]. [`starts_with`][ssw] and [`ends_with`][sew] are also faster. * The performance of `PartialEq` for slices is [much faster][ps]. * The [`Hash`] trait offers the default method, [`hash_slice`], which is overridden and optimized by the implementations for scalars. * The [`Hasher`] trait now has a number of specialized `write_*` methods for primitive types, for efficiency. * The I/O-specific error type, [`std::io::Error`][ie], gained a set of methods for accessing the 'inner error', if any: [`get_ref`][iegr], [`get_mut`][iegm], [`into_inner`][ieii]. As well, the implementation of [`std::error::Error::cause`][iec] also delegates to the inner error. * [`process::Child`][pc] gained the [`id`] method, which returns a `u32` representing the platform-specific process identifier. * The [`connect`] method on slices is deprecated, replaced by the new [`join`] method (note that both of these are on the *unstable* [`SliceConcatExt`] trait, but through the magic of the prelude are available to stable code anyway). * The [`Div`] operator is implemented for [`Wrapping`] types. * [`DerefMut` is implemented for `String`][dms]. * Performance of SipHash (the default hasher for `HashMap`) is [better for long data][sh]. * [`AtomicPtr`] implements [`Send`]. * The [`read_to_end`] implementations for [`Stdin`] and [`File`] are now [specialized to use uninitalized buffers for increased performance][rte]. * Lifetime parameters of foreign functions [are now resolved properly][f]. Misc ---- * Rust can now, with some coercion, [produce programs that run on Windows XP][xp], though XP is not considered a supported platform. * Porting Rust on Windows from the GNU toolchain to MSVC continues ([1][win1], [2][win2], [3][win3], [4][win4]). It is still not recommended for use in 1.3, though should be fully-functional in the [64-bit 1.4 beta][b14]. * On Fedora-based systems installation will [properly configure the dynamic linker][fl]. * The compiler gained many new extended error descriptions, which can be accessed with the `--explain` flag. * The `dropck` pass, which checks that destructors can't access destroyed values, [has been rewritten][dropck]. This fixes some soundness holes, and as such will cause some previously-compiling code to no longer build. * `rustc` now uses [LLVM to write archive files where possible][ar]. Eventually this will eliminate the compiler's dependency on the ar utility. * Rust has [preliminary support for i686 FreeBSD][fb] (it has long supported FreeBSD on x86_64). * The [`unused_mut`][lum], [`unconditional_recursion`][lur], [`improper_ctypes`][lic], and [`negate_unsigned`][lnu] lints are more strict. * If landing pads are disabled (with `-Z no-landing-pads`), [`panic!` will kill the process instead of leaking][nlp]. [`Any`]: http://doc.rust-lang.org/nightly/std/any/trait.Any.html [`AtomicPtr`]: http://doc.rust-lang.org/nightly/std/sync/atomic/struct.AtomicPtr.html [`Borrow`]: http://doc.rust-lang.org/nightly/std/borrow/trait.Borrow.html [`CStr`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CStr.html [`CString`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html [`Debug`]: http://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html [`DerefMut`]: http://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html [`Deref`]: http://doc.rust-lang.org/nightly/std/ops/trait.Deref.html [`Div`]: http://doc.rust-lang.org/nightly/std/ops/trait.Div.html [`Duration`]: http://doc.rust-lang.org/nightly/std/time/struct.Duration.html [`Error`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html [`File`]: http://doc.rust-lang.org/nightly/std/fs/struct.File.html [`Hash`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html [`Hasher`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html [`Send`]: http://doc.rust-lang.org/nightly/std/marker/trait.Send.html [`SliceConcatExt`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html [`Stdin`]: http://doc.rust-lang.org/nightly/std/io/struct.Stdin.html [`ToOwned`]: http://doc.rust-lang.org/nightly/std/borrow/trait.ToOwned.html [`Wrapping`]: http://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html [`connect`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.connect [`downcast_mut`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_mut [`downcast_ref`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast_ref [`downcast`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.downcast [`hash_slice`]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice [`id`]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html#method.id [`is`]: http://doc.rust-lang.org/nightly/std/error/trait.Error.html#method.is [`join`]: http://doc.rust-lang.org/nightly/std/slice/trait.SliceConcatExt.html#method.join [`read_to_end`]: http://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_to_end [ar]: https://github.com/rust-lang/rust/pull/26926 [b14]: https://static.rust-lang.org/dist/rust-beta-x86_64-pc-windows-msvc.msi [dms]: https://github.com/rust-lang/rust/pull/26241 [dropck]: https://github.com/rust-lang/rust/pull/27261 [dropckrfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md [ds]: https://github.com/rust-lang/rust/pull/26818 [dst1]: http://doc.rust-lang.org/nightly/std/mem/fn.size_of_val.html [dst2]: http://doc.rust-lang.org/nightly/std/mem/fn.align_of_val.html [dst3]: https://github.com/rust-lang/rust/pull/27351 [e]: https://github.com/rust-lang/rust/pull/24793 [f]: https://github.com/rust-lang/rust/pull/26588 [fb]: https://github.com/rust-lang/rust/pull/26959 [fl]: https://github.com/rust-lang/rust-installer/pull/41 [hs]: http://doc.rust-lang.org/nightly/std/hash/trait.Hash.html#method.hash_slice [ie]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html [iec]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.cause [iegm]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_mut [iegr]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.get_ref [ieii]: http://doc.rust-lang.org/nightly/std/io/struct.Error.html#method.into_inner [lic]: https://github.com/rust-lang/rust/pull/26583 [lnu]: https://github.com/rust-lang/rust/pull/27026 [lr]: https://github.com/rust-lang/rust/issues/27248 [lum]: https://github.com/rust-lang/rust/pull/26378 [lur]: https://github.com/rust-lang/rust/pull/26783 [nlp]: https://github.com/rust-lang/rust/pull/27176 [nold2]: https://github.com/rust-lang/rust/pull/27045 [nold]: https://github.com/rust-lang/rfcs/blob/master/text/1156-adjust-default-object-bounds.md [nom]: http://doc.rust-lang.org/nightly/nomicon/ [pc]: http://doc.rust-lang.org/nightly/std/process/struct.Child.html [pi]: https://github.com/rust-lang/rust/pull/26699 [ps]: https://github.com/rust-lang/rust/pull/26884 [rte]: https://github.com/rust-lang/rust/pull/26950 [sc]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.contains [search]: https://github.com/rust-lang/rust/pull/26327 [sew]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.ends_with [sf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.find [sh]: https://github.com/rust-lang/rust/pull/27280 [srf]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.rfind [ss]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.split [ssw]: http://doc.rust-lang.org/nightly/std/primitive.str.html#method.starts_with [st]: https://github.com/rust-lang/rust/pull/26630 [win1]: https://github.com/rust-lang/rust/pull/26569 [win2]: https://github.com/rust-lang/rust/pull/26741 [win3]: https://github.com/rust-lang/rust/pull/26741 [win4]: https://github.com/rust-lang/rust/pull/27210 [xp]: https://github.com/rust-lang/rust/pull/26569 Version 1.2.0 (2015-08-07) ========================== * ~1200 changes, numerous bugfixes Highlights ---------- * [Dynamically-sized-type coercions][dst] allow smart pointer types like `Rc` to contain types without a fixed size, arrays and trait objects, finally enabling use of `Rc<[T]>` and completing the implementation of DST. * [Parallel codegen][parcodegen] is now working again, which can substantially speed up large builds in debug mode; It also gets another ~33% speedup when bootstrapping on a 4 core machine (using 8 jobs). It's not enabled by default, but will be "in the near future". It can be activated with the `-C codegen-units=N` flag to `rustc`. * This is the first release with [experimental support for linking with the MSVC linker and lib C on Windows (instead of using the GNU variants via MinGW)][win]. It is yet recommended only for the most intrepid Rusticians. * Benchmark compilations are showing a 30% improvement in bootstrapping over 1.1. Breaking Changes ---------------- * The [`to_uppercase`] and [`to_lowercase`] methods on `char` now do unicode case mapping, which is a previously-planned change in behavior and considered a bugfix. * [`mem::align_of`] now specifies [the *minimum alignment* for T][align], which is usually the alignment programs are interested in, and the same value reported by clang's `alignof`. [`mem::min_align_of`] is deprecated. This is not known to break real code. * [The `#[packed]` attribute is no longer silently accepted by the compiler][packed]. This attribute did nothing and code that mentioned it likely did not work as intended. * Associated type defaults are [now behind the `associated_type_defaults` feature gate][ad]. In 1.1 associated type defaults *did not work*, but could be mentioned syntactically. As such this breakage has minimal impact. Language -------- * Patterns with `ref mut` now correctly invoke [`DerefMut`] when matching against dereferencable values. Libraries --------- * The [`Extend`] trait, which grows a collection from an iterator, is implemented over iterators of references, for `String`, `Vec`, `LinkedList`, `VecDeque`, `EnumSet`, `BinaryHeap`, `VecMap`, `BTreeSet` and `BTreeMap`. [RFC][extend-rfc]. * The [`iter::once`] function returns an iterator that yields a single element, and [`iter::empty`] returns an iterator that yields no elements. * The [`matches`] and [`rmatches`] methods on `str` return iterators over substring matches. * [`Cell`] and [`RefCell`] both implement `Eq`. * A number of methods for wrapping arithmetic are added to the integral types, [`wrapping_div`], [`wrapping_rem`], [`wrapping_neg`], [`wrapping_shl`], [`wrapping_shr`]. These are in addition to the existing [`wrapping_add`], [`wrapping_sub`], and [`wrapping_mul`] methods, and alternatives to the [`Wrapping`] type.. It is illegal for the default arithmetic operations in Rust to overflow; the desire to wrap must be explicit. * The `{:#?}` formatting specifier [displays the alternate, pretty-printed][debugfmt] form of the `Debug` formatter. This feature was actually introduced prior to 1.0 with little fanfare. * [`fmt::Formatter`] implements [`fmt::Write`], a `fmt`-specific trait for writing data to formatted strings, similar to [`io::Write`]. * [`fmt::Formatter`] adds 'debug builder' methods, [`debug_struct`], [`debug_tuple`], [`debug_list`], [`debug_set`], [`debug_map`]. These are used by code generators to emit implementations of [`Debug`]. * `str` has new [`to_uppercase`][strup] and [`to_lowercase`][strlow] methods that convert case, following Unicode case mapping. * It is now easier to handle poisoned locks. The [`PoisonError`] type, returned by failing lock operations, exposes `into_inner`, `get_ref`, and `get_mut`, which all give access to the inner lock guard, and allow the poisoned lock to continue to operate. The `is_poisoned` method of [`RwLock`] and [`Mutex`] can poll for a poisoned lock without attempting to take the lock. * On Unix the [`FromRawFd`] trait is implemented for [`Stdio`], and [`AsRawFd`] for [`ChildStdin`], [`ChildStdout`], [`ChildStderr`]. On Windows the `FromRawHandle` trait is implemented for `Stdio`, and `AsRawHandle` for `ChildStdin`, `ChildStdout`, `ChildStderr`. * [`io::ErrorKind`] has a new variant, `InvalidData`, which indicates malformed input. Misc ---- * `rustc` employs smarter heuristics for guessing at [typos]. * `rustc` emits more efficient code for [no-op conversions between unsafe pointers][nop]. * Fat pointers are now [passed in pairs of immediate arguments][fat], resulting in faster compile times and smaller code. [`Extend`]: https://doc.rust-lang.org/nightly/std/iter/trait.Extend.html [extend-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0839-embrace-extend-extinguish.md [`iter::once`]: https://doc.rust-lang.org/nightly/std/iter/fn.once.html [`iter::empty`]: https://doc.rust-lang.org/nightly/std/iter/fn.empty.html [`matches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.matches [`rmatches`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatches [`Cell`]: https://doc.rust-lang.org/nightly/std/cell/struct.Cell.html [`RefCell`]: https://doc.rust-lang.org/nightly/std/cell/struct.RefCell.html [`wrapping_add`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_add [`wrapping_sub`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_sub [`wrapping_mul`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_mul [`wrapping_div`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_div [`wrapping_rem`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_rem [`wrapping_neg`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_neg [`wrapping_shl`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shl [`wrapping_shr`]: https://doc.rust-lang.org/nightly/std/primitive.i8.html#method.wrapping_shr [`Wrapping`]: https://doc.rust-lang.org/nightly/std/num/struct.Wrapping.html [`fmt::Formatter`]: https://doc.rust-lang.org/nightly/std/fmt/struct.Formatter.html [`fmt::Write`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Write.html [`io::Write`]: https://doc.rust-lang.org/nightly/std/io/trait.Write.html [`debug_struct`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_struct [`debug_tuple`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_tuple [`debug_list`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_list [`debug_set`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_set [`debug_map`]: https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html#method.debug_map [`Debug`]: https://doc.rust-lang.org/nightly/std/fmt/trait.Debug.html [strup]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_uppercase [strlow]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.to_lowercase [`to_uppercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_uppercase [`to_lowercase`]: https://doc.rust-lang.org/nightly/std/primitive.char.html#method.to_lowercase [`PoisonError`]: https://doc.rust-lang.org/nightly/std/sync/struct.PoisonError.html [`RwLock`]: https://doc.rust-lang.org/nightly/std/sync/struct.RwLock.html [`Mutex`]: https://doc.rust-lang.org/nightly/std/sync/struct.Mutex.html [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html [`Stdio`]: https://doc.rust-lang.org/nightly/std/process/struct.Stdio.html [`ChildStdin`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdin.html [`ChildStdout`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStdout.html [`ChildStderr`]: https://doc.rust-lang.org/nightly/std/process/struct.ChildStderr.html [`io::ErrorKind`]: https://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html [debugfmt]: https://www.reddit.com/r/rust/comments/3ceaui/psa_produces_prettyprinted_debug_output/ [`DerefMut`]: https://doc.rust-lang.org/nightly/std/ops/trait.DerefMut.html [`mem::align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.align_of.html [align]: https://github.com/rust-lang/rust/pull/25646 [`mem::min_align_of`]: https://doc.rust-lang.org/nightly/std/mem/fn.min_align_of.html [typos]: https://github.com/rust-lang/rust/pull/26087 [nop]: https://github.com/rust-lang/rust/pull/26336 [fat]: https://github.com/rust-lang/rust/pull/26411 [dst]: https://github.com/rust-lang/rfcs/blob/master/text/0982-dst-coercion.md [parcodegen]: https://github.com/rust-lang/rust/pull/26018 [packed]: https://github.com/rust-lang/rust/pull/25541 [ad]: https://github.com/rust-lang/rust/pull/27382 [win]: https://github.com/rust-lang/rust/pull/25350 Version 1.1.0 (2015-06-25) ========================= * ~850 changes, numerous bugfixes Highlights ---------- * The [`std::fs` module has been expanded][fs] to expand the set of functionality exposed: * `DirEntry` now supports optimizations like `file_type` and `metadata` which don't incur a syscall on some platforms. * A `symlink_metadata` function has been added. * The `fs::Metadata` structure now lowers to its OS counterpart, providing access to all underlying information. * The compiler now contains extended explanations of many errors. When an error with an explanation occurs the compiler suggests using the `--explain` flag to read the explanation. Error explanations are also [available online][err-index]. * Thanks to multiple [improvements][sk] to [type checking][pre], as well as other work, the time to bootstrap the compiler decreased by 32%. Libraries --------- * The [`str::split_whitespace`] method splits a string on unicode whitespace boundaries. * On both Windows and Unix, new extension traits provide conversion of I/O types to and from the underlying system handles. On Unix, these traits are [`FromRawFd`] and [`AsRawFd`], on Windows `FromRawHandle` and `AsRawHandle`. These are implemented for `File`, `TcpStream`, `TcpListener`, and `UpdSocket`. Further implementations for `std::process` will be stabilized later. * On Unix, [`std::os::unix::symlink`] creates symlinks. On Windows, symlinks can be created with `std::os::windows::symlink_dir` and `std::os::windows::symlink_file`. * The `mpsc::Receiver` type can now be converted into an iterator with `into_iter` on the [`IntoIterator`] trait. * `Ipv4Addr` can be created from `u32` with the `From` implementation of the [`From`] trait. * The `Debug` implementation for `RangeFull` [creates output that is more consistent with other implementations][rf]. * [`Debug` is implemented for `File`][file]. * The `Default` implementation for `Arc` [no longer requires `Sync + Send`][arc]. * [The `Iterator` methods `count`, `nth`, and `last` have been overridden for slices to have O(1) performance instead of O(n)][si]. * Incorrect handling of paths on Windows has been improved in both the compiler and the standard library. * [`AtomicPtr` gained a `Default` implementation][ap]. * In accordance with Rust's policy on arithmetic overflow `abs` now [panics on overflow when debug assertions are enabled][abs]. * The [`Cloned`] iterator, which was accidentally left unstable for 1.0 [has been stabilized][c]. * The [`Incoming`] iterator, which iterates over incoming TCP connections, and which was accidentally unnamable in 1.0, [is now properly exported][inc]. * [`BinaryHeap`] no longer corrupts itself [when functions called by `sift_up` or `sift_down` panic][bh]. * The [`split_off`] method of `LinkedList` [no longer corrupts the list in certain scenarios][ll]. Misc ---- * Type checking performance [has improved notably][sk] with [multiple improvements][pre]. * The compiler [suggests code changes][ch] for more errors. * rustc and it's build system have experimental support for [building toolchains against MUSL][m] instead of glibc on Linux. * The compiler defines the `target_env` cfg value, which is used for distinguishing toolchains that are otherwise for the same platform. Presently this is set to `gnu` for common GNU Linux targets and for MinGW targets, and `musl` for MUSL Linux targets. * The [`cargo rustc`][crc] command invokes a build with custom flags to rustc. * [Android executables are always position independent][pie]. * [The `drop_with_repr_extern` lint warns about mixing `repr(C)` with `Drop`][drop]. [`str::split_whitespace`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_whitespace [`FromRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html [`AsRawFd`]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html [`std::os::unix::symlink`]: https://doc.rust-lang.org/nightly/std/os/unix/fs/fn.symlink.html [`IntoIterator`]: https://doc.rust-lang.org/nightly/std/iter/trait.IntoIterator.html [`From`]: https://doc.rust-lang.org/nightly/std/convert/trait.From.html [rf]: https://github.com/rust-lang/rust/pull/24491 [err-index]: https://doc.rust-lang.org/error-index.html [sk]: https://github.com/rust-lang/rust/pull/24615 [pre]: https://github.com/rust-lang/rust/pull/25323 [file]: https://github.com/rust-lang/rust/pull/24598 [ch]: https://github.com/rust-lang/rust/pull/24683 [arc]: https://github.com/rust-lang/rust/pull/24695 [si]: https://github.com/rust-lang/rust/pull/24701 [ap]: https://github.com/rust-lang/rust/pull/24834 [m]: https://github.com/rust-lang/rust/pull/24777 [fs]: https://github.com/rust-lang/rfcs/blob/master/text/1044-io-fs-2.1.md [crc]: https://github.com/rust-lang/cargo/pull/1568 [pie]: https://github.com/rust-lang/rust/pull/24953 [abs]: https://github.com/rust-lang/rust/pull/25441 [c]: https://github.com/rust-lang/rust/pull/25496 [`Cloned`]: https://doc.rust-lang.org/nightly/std/iter/struct.Cloned.html [`Incoming`]: https://doc.rust-lang.org/nightly/std/net/struct.Incoming.html [inc]: https://github.com/rust-lang/rust/pull/25522 [bh]: https://github.com/rust-lang/rust/pull/25856 [`BinaryHeap`]: https://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html [ll]: https://github.com/rust-lang/rust/pull/26022 [`split_off`]: https://doc.rust-lang.org/nightly/collections/linked_list/struct.LinkedList.html#method.split_off [drop]: https://github.com/rust-lang/rust/pull/24935 Version 1.0.0 (2015-05-15) ======================== * ~1500 changes, numerous bugfixes Highlights ---------- * The vast majority of the standard library is now `#[stable]`. It is no longer possible to use unstable features with a stable build of the compiler. * Many popular crates on [crates.io] now work on the stable release channel. * Arithmetic on basic integer types now [checks for overflow in debug builds][overflow]. Language -------- * Several [restrictions have been added to trait coherence][coh] in order to make it easier for upstream authors to change traits without breaking downstream code. * Digits of binary and octal literals are [lexed more eagerly][lex] to improve error messages and macro behavior. For example, `0b1234` is now lexed as `0b1234` instead of two tokens, `0b1` and `234`. * Trait bounds [are always invariant][inv], eliminating the need for the `PhantomFn` and `MarkerTrait` lang items, which have been removed. * ["-" is no longer a valid character in crate names][cr], the `extern crate "foo" as bar` syntax has been replaced with `extern crate foo as bar`, and Cargo now automatically translates "-" in *package* names to underscore for the crate name. * [Lifetime shadowing is an error][lt]. * [`Send` no longer implies `'static`][send-rfc]. * [UFCS now supports trait-less associated paths][moar-ufcs] like `MyType::default()`. * Primitive types [now have inherent methods][prim-inherent], obviating the need for extension traits like `SliceExt`. * Methods with `Self: Sized` in their `where` clause are [considered object-safe][self-sized], allowing many extension traits like `IteratorExt` to be merged into the traits they extended. * You can now [refer to associated types][assoc-where] whose corresponding trait bounds appear only in a `where` clause. * The final bits of [OIBIT landed][oibit-final], meaning that traits like `Send` and `Sync` are now library-defined. * A [Reflect trait][reflect] was introduced, which means that downcasting via the `Any` trait is effectively limited to concrete types. This helps retain the potentially-important "parametricity" property: generic code cannot behave differently for different type arguments except in minor ways. * The `unsafe_destructor` feature is now deprecated in favor of the [new `dropck`][dropck]. This change is a major reduction in unsafe code. Libraries --------- * The `thread_local` module [has been renamed to `std::thread`][th]. * The methods of `IteratorExt` [have been moved to the `Iterator` trait itself][ie]. * Several traits that implement Rust's conventions for type conversions, `AsMut`, `AsRef`, `From`, and `Into` have been [centralized in the `std::convert` module][con]. * The `FromError` trait [was removed in favor of `From`][fe]. * The basic sleep function [has moved to `std::thread::sleep_ms`][slp]. * The `splitn` function now takes an `n` parameter that represents the number of items yielded by the returned iterator [instead of the number of 'splits'][spl]. * [On Unix, all file descriptors are `CLOEXEC` by default][clo]. * [Derived implementations of `PartialOrd` now order enums according to their explicitly-assigned discriminants][po]. * [Methods for searching strings are generic over `Pattern`s][pat], implemented presently by `&char`, `&str`, `FnMut(char) -> bool` and some others. * [In method resolution, object methods are resolved before inherent methods][meth]. * [`String::from_str` has been deprecated in favor of the `From` impl, `String::from`][sf]. * [`io::Error` implements `Sync`][ios]. * [The `words` method on `&str` has been replaced with `split_whitespace`][sw], to avoid answering the tricky question, 'what is a word?' * The new path and IO modules are complete and `#[stable]`. This was the major library focus for this cycle. * The path API was [revised][path-normalize] to normalize `.`, adjusting the tradeoffs in favor of the most common usage. * A large number of remaining APIs in `std` were also stabilized during this cycle; about 75% of the non-deprecated API surface is now stable. * The new [string pattern API][string-pattern] landed, which makes the string slice API much more internally consistent and flexible. * A new set of [generic conversion traits][conversion] replaced many existing ad hoc traits. * Generic numeric traits were [completely removed][num-traits]. This was made possible thanks to inherent methods for primitive types, and the removal gives maximal flexibility for designing a numeric hierarchy in the future. * The `Fn` traits are now related via [inheritance][fn-inherit] and provide ergonomic [blanket implementations][fn-blanket]. * The `Index` and `IndexMut` traits were changed to [take the index by value][index-value], enabling code like `hash_map["string"]` to work. * `Copy` now [inherits][copy-clone] from `Clone`, meaning that all `Copy` data is known to be `Clone` as well. Misc ---- * Many errors now have extended explanations that can be accessed with the `--explain` flag to `rustc`. * Many new examples have been added to the standard library documentation. * rustdoc has received a number of improvements focused on completion and polish. * Metadata was tuned, shrinking binaries [by 27%][metadata-shrink]. * Much headway was made on ecosystem-wide CI, making it possible to [compare builds for breakage][ci-compare]. [crates.io]: http://crates.io [clo]: https://github.com/rust-lang/rust/pull/24034 [coh]: https://github.com/rust-lang/rfcs/blob/master/text/1023-rebalancing-coherence.md [con]: https://github.com/rust-lang/rust/pull/23875 [cr]: https://github.com/rust-lang/rust/pull/23419 [fe]: https://github.com/rust-lang/rust/pull/23879 [ie]: https://github.com/rust-lang/rust/pull/23300 [inv]: https://github.com/rust-lang/rust/pull/23938 [ios]: https://github.com/rust-lang/rust/pull/24133 [lex]: https://github.com/rust-lang/rfcs/blob/master/text/0879-small-base-lexing.md [lt]: https://github.com/rust-lang/rust/pull/24057 [meth]: https://github.com/rust-lang/rust/pull/24056 [pat]: https://github.com/rust-lang/rfcs/blob/master/text/0528-string-patterns.md [po]: https://github.com/rust-lang/rust/pull/24270 [sf]: https://github.com/rust-lang/rust/pull/24517 [slp]: https://github.com/rust-lang/rust/pull/23949 [spl]: https://github.com/rust-lang/rfcs/blob/master/text/0979-align-splitn-with-other-languages.md [sw]: https://github.com/rust-lang/rfcs/blob/master/text/1054-str-words.md [th]: https://github.com/rust-lang/rfcs/blob/master/text/0909-move-thread-local-to-std-thread.md [send-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0458-send-improvements.md [moar-ufcs]: https://github.com/rust-lang/rust/pull/22172 [prim-inherent]: https://github.com/rust-lang/rust/pull/23104 [overflow]: https://github.com/rust-lang/rfcs/blob/master/text/0560-integer-overflow.md [metadata-shrink]: https://github.com/rust-lang/rust/pull/22971 [self-sized]: https://github.com/rust-lang/rust/pull/22301 [assoc-where]: https://github.com/rust-lang/rust/pull/22512 [string-pattern]: https://github.com/rust-lang/rust/pull/22466 [oibit-final]: https://github.com/rust-lang/rust/pull/21689 [reflect]: https://github.com/rust-lang/rust/pull/23712 [conversion]: https://github.com/rust-lang/rfcs/pull/529 [num-traits]: https://github.com/rust-lang/rust/pull/23549 [index-value]: https://github.com/rust-lang/rust/pull/23601 [dropck]: https://github.com/rust-lang/rfcs/pull/769 [ci-compare]: https://gist.github.com/brson/a30a77836fbec057cbee [fn-inherit]: https://github.com/rust-lang/rust/pull/23282 [fn-blanket]: https://github.com/rust-lang/rust/pull/23895 [copy-clone]: https://github.com/rust-lang/rust/pull/23860 [path-normalize]: https://github.com/rust-lang/rust/pull/23229 Version 1.0.0-alpha.2 (2015-02-20) ===================================== * ~1300 changes, numerous bugfixes * Highlights * The various I/O modules were [overhauled][io-rfc] to reduce unnecessary abstractions and provide better interoperation with the underlying platform. The old `io` module remains temporarily at `std::old_io`. * The standard library now [participates in feature gating][feat], so use of unstable libraries now requires a `#![feature(...)]` attribute. The impact of this change is [described on the forum][feat-forum]. [RFC][feat-rfc]. * Language * `for` loops [now operate on the `IntoIterator` trait][into], which eliminates the need to call `.iter()`, etc. to iterate over collections. There are some new subtleties to remember though regarding what sort of iterators various types yield, in particular that `for foo in bar { }` yields values from a move iterator, destroying the original collection. [RFC][into-rfc]. * Objects now have [default lifetime bounds][obj], so you don't have to write `Box` when you don't care about storing references. [RFC][obj-rfc]. * In types that implement `Drop`, [lifetimes must outlive the value][drop]. This will soon make it possible to safely implement `Drop` for types where `#[unsafe_destructor]` is now required. Read the [gorgeous RFC][drop-rfc] for details. * The fully qualified ::X syntax lets you set the Self type for a trait method or associated type. [RFC][ufcs-rfc]. * References to types that implement `Deref` now [automatically coerce to references][deref] to the dereferenced type `U`, e.g. `&T where T: Deref` automatically coerces to `&U`. This should eliminate many unsightly uses of `&*`, as when converting from references to vectors into references to slices. [RFC][deref-rfc]. * The explicit [closure kind syntax][close] (`|&:|`, `|&mut:|`, `|:|`) is obsolete and closure kind is inferred from context. * [`Self` is a keyword][Self]. * Libraries * The `Show` and `String` formatting traits [have been renamed][fmt] to `Debug` and `Display` to more clearly reflect their related purposes. Automatically getting a string conversion to use with `format!("{:?}", something_to_debug)` is now written `#[derive(Debug)]`. * Abstract [OS-specific string types][osstr], `std::ff::{OsString, OsStr}`, provide strings in platform-specific encodings for easier interop with system APIs. [RFC][osstr-rfc]. * The `boxed::into_raw` and `Box::from_raw` functions [convert between `Box` and `*mut T`][boxraw], a common pattern for creating raw pointers. * Tooling * Certain long error messages of the form 'expected foo found bar' are now [split neatly across multiple lines][multiline]. Examples in the PR. * On Unix Rust can be [uninstalled][un] by running `/usr/local/lib/rustlib/uninstall.sh`. * The `#[rustc_on_unimplemented]` attribute, requiring the 'on_unimplemented' feature, lets rustc [display custom error messages when a trait is expected to be implemented for a type but is not][onun]. * Misc * Rust is tested against a [LALR grammar][lalr], which parses almost all the Rust files that rustc does. [boxraw]: https://github.com/rust-lang/rust/pull/21318 [close]: https://github.com/rust-lang/rust/pull/21843 [deref]: https://github.com/rust-lang/rust/pull/21351 [deref-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0241-deref-conversions.md [drop]: https://github.com/rust-lang/rust/pull/21972 [drop-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0769-sound-generic-drop.md [feat]: https://github.com/rust-lang/rust/pull/21248 [feat-forum]: https://users.rust-lang.org/t/psa-important-info-about-rustcs-new-feature-staging/82/5 [feat-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0507-release-channels.md [fmt]: https://github.com/rust-lang/rust/pull/21457 [into]: https://github.com/rust-lang/rust/pull/20790 [into-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md#intoiterator-and-iterable [io-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md [lalr]: https://github.com/rust-lang/rust/pull/21452 [multiline]: https://github.com/rust-lang/rust/pull/19870 [obj]: https://github.com/rust-lang/rust/pull/22230 [obj-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0599-default-object-bound.md [onun]: https://github.com/rust-lang/rust/pull/20889 [osstr]: https://github.com/rust-lang/rust/pull/21488 [osstr-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md [Self]: https://github.com/rust-lang/rust/pull/22158 [ufcs-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0132-ufcs.md [un]: https://github.com/rust-lang/rust/pull/22256 Version 1.0.0-alpha (2015-01-09) ================================== * ~2400 changes, numerous bugfixes * Highlights * The language itself is considered feature complete for 1.0, though there will be many usability improvements and bugfixes before the final release. * Nearly 50% of the public API surface of the standard library has been declared 'stable'. Those interfaces are unlikely to change before 1.0. * The long-running debate over integer types has been [settled][ints]: Rust will ship with types named `isize` and `usize`, rather than `int` and `uint`, for pointer-sized integers. Guidelines will be rolled out during the alpha cycle. * Most crates that are not `std` have been moved out of the Rust distribution into the Cargo ecosystem so they can evolve separately and don't need to be stabilized as quickly, including 'time', 'getopts', 'num', 'regex', and 'term'. * Documentation continues to be expanded with more API coverage, more examples, and more in-depth explanations. The guides have been consolidated into [The Rust Programming Language][trpl]. * "[Rust By Example][rbe]" is now maintained by the Rust team. * All official Rust binary installers now come with [Cargo], the Rust package manager. * Language * Closures have been [completely redesigned][unboxed] to be implemented in terms of traits, can now be used as generic type bounds and thus monomorphized and inlined, or via an opaque pointer (boxed) as in the old system. The new system is often referred to as 'unboxed' closures. * Traits now support [associated types][assoc], allowing families of related types to be defined together and used generically in powerful ways. * Enum variants are [namespaced by their type names][enum]. * [`where` clauses][where] provide a more versatile and attractive syntax for specifying generic bounds, though the previous syntax remains valid. * Rust again picks a [fallback][fb] (either i32 or f64) for uninferred numeric types. * Rust [no longer has a runtime][rt] of any description, and only supports OS threads, not green threads. * At long last, Rust has been overhauled for 'dynamically-sized types' ([DST]), which integrates 'fat pointers' (object types, arrays, and `str`) more deeply into the type system, making it more consistent. * Rust now has a general [range syntax][range], `i..j`, `i..`, and `..j` that produce range types and which, when combined with the `Index` operator and multidispatch, leads to a convenient slice notation, `[i..j]`. * The new range syntax revealed an ambiguity in the fixed-length array syntax, so now fixed length arrays [are written `[T; N]`][arrays]. * The `Copy` trait is no longer implemented automatically. Unsafe pointers no longer implement `Sync` and `Send` so types containing them don't automatically either. `Sync` and `Send` are now 'unsafe traits' so one can "forcibly" implement them via `unsafe impl` if a type confirms to the requirements for them even though the internals do not (e.g. structs containing unsafe pointers like `Arc`). These changes are intended to prevent some footguns and are collectively known as [opt-in built-in traits][oibit] (though `Sync` and `Send` will soon become pure library types unknown to the compiler). * Operator traits now take their operands [by value][ops], and comparison traits can use multidispatch to compare one type against multiple other types, allowing e.g. `String` to be compared with `&str`. * `if let` and `while let` are no longer feature-gated. * Rust has adopted a more [uniform syntax for escaping unicode characters][unicode]. * `macro_rules!` [has been declared stable][mac]. Though it is a flawed system it is sufficiently popular that it must be usable for 1.0. Effort has gone into [future-proofing][mac-future] it in ways that will allow other macro systems to be developed in parallel, and won't otherwise impact the evolution of the language. * The prelude has been [pared back significantly][prelude] such that it is the minimum necessary to support the most pervasive code patterns, and through [generalized where clauses][where] many of the prelude extension traits have been consolidated. * Rust's rudimentary reflection [has been removed][refl], as it incurred too much code generation for little benefit. * [Struct variants][structvars] are no longer feature-gated. * Trait bounds can be [polymorphic over lifetimes][hrtb]. Also known as 'higher-ranked trait bounds', this crucially allows unboxed closures to work. * Macros invocations surrounded by parens or square brackets and not terminated by a semicolon are [parsed as expressions][macros], which makes expressions like `vec![1i32, 2, 3].len()` work as expected. * Trait objects now implement their traits automatically, and traits that can be coerced to objects now must be [object safe][objsafe]. * Automatically deriving traits is now done with `#[derive(...)]` not `#[deriving(...)]` for [consistency with other naming conventions][derive]. * Importing the containing module or enum at the same time as items or variants they contain is [now done with `self` instead of `mod`][self], as in use `foo::{self, bar}` * Glob imports are no longer feature-gated. * The `box` operator and `box` patterns have been feature-gated pending a redesign. For now unique boxes should be allocated like other containers, with `Box::new`. * Libraries * A [series][coll1] of [efforts][coll2] to establish [conventions][coll3] for collections types has resulted in API improvements throughout the standard library. * New [APIs for error handling][err] provide ergonomic interop between error types, and [new conventions][err-conv] describe more clearly the recommended error handling strategies in Rust. * The `fail!` macro has been renamed to [`panic!`][panic] so that it is easier to discuss failure in the context of error handling without making clarifications as to whether you are referring to the 'fail' macro or failure more generally. * On Linux, `OsRng` prefers the new, more reliable `getrandom` syscall when available. * The 'serialize' crate has been renamed 'rustc-serialize' and moved out of the distribution to Cargo. Although it is widely used now, it is expected to be superseded in the near future. * The `Show` formatter, typically implemented with `#[derive(Show)]` is [now requested with the `{:?}` specifier][show] and is intended for use by all types, for uses such as `println!` debugging. The new `String` formatter must be implemented by hand, uses the `{}` specifier, and is intended for full-fidelity conversions of things that can logically be represented as strings. * Tooling * [Flexible target specification][flex] allows rustc's code generation to be configured to support otherwise-unsupported platforms. * Rust comes with rust-gdb and rust-lldb scripts that launch their respective debuggers with Rust-appropriate pretty-printing. * The Windows installation of Rust is distributed with the MinGW components currently required to link binaries on that platform. * Misc * Nullable enum optimizations have been extended to more types so that e.g. `Option>` and `Option` take up no more space than the inner types themselves. * Work has begun on supporting AArch64. [Cargo]: https://crates.io [unboxed]: http://smallcultfollowing.com/babysteps/blog/2014/11/26/purging-proc/ [enum]: https://github.com/rust-lang/rfcs/blob/master/text/0390-enum-namespacing.md [flex]: https://github.com/rust-lang/rfcs/blob/master/text/0131-target-specification.md [err]: https://github.com/rust-lang/rfcs/blob/master/text/0201-error-chaining.md [err-conv]: https://github.com/rust-lang/rfcs/blob/master/text/0236-error-conventions.md [rt]: https://github.com/rust-lang/rfcs/blob/master/text/0230-remove-runtime.md [mac]: https://github.com/rust-lang/rfcs/blob/master/text/0453-macro-reform.md [mac-future]: https://github.com/rust-lang/rfcs/pull/550 [DST]: http://smallcultfollowing.com/babysteps/blog/2014/01/05/dst-take-5/ [coll1]: https://github.com/rust-lang/rfcs/blob/master/text/0235-collections-conventions.md [coll2]: https://github.com/rust-lang/rfcs/blob/master/text/0509-collections-reform-part-2.md [coll3]: https://github.com/rust-lang/rfcs/blob/master/text/0216-collection-views.md [ops]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md [prelude]: https://github.com/rust-lang/rfcs/blob/master/text/0503-prelude-stabilization.md [where]: https://github.com/rust-lang/rfcs/blob/master/text/0135-where.md [refl]: https://github.com/rust-lang/rfcs/blob/master/text/0379-remove-reflection.md [panic]: https://github.com/rust-lang/rfcs/blob/master/text/0221-panic.md [structvars]: https://github.com/rust-lang/rfcs/blob/master/text/0418-struct-variants.md [hrtb]: https://github.com/rust-lang/rfcs/blob/master/text/0387-higher-ranked-trait-bounds.md [unicode]: https://github.com/rust-lang/rfcs/blob/master/text/0446-es6-unicode-escapes.md [oibit]: https://github.com/rust-lang/rfcs/blob/master/text/0019-opt-in-builtin-traits.md [macros]: https://github.com/rust-lang/rfcs/blob/master/text/0378-expr-macros.md [range]: https://github.com/rust-lang/rfcs/blob/master/text/0439-cmp-ops-reform.md#indexing-and-slicing [arrays]: https://github.com/rust-lang/rfcs/blob/master/text/0520-new-array-repeat-syntax.md [show]: https://github.com/rust-lang/rfcs/blob/master/text/0504-show-stabilization.md [derive]: https://github.com/rust-lang/rfcs/blob/master/text/0534-deriving2derive.md [self]: https://github.com/rust-lang/rfcs/blob/master/text/0532-self-in-use.md [fb]: https://github.com/rust-lang/rfcs/blob/master/text/0212-restore-int-fallback.md [objsafe]: https://github.com/rust-lang/rfcs/blob/master/text/0255-object-safety.md [assoc]: https://github.com/rust-lang/rfcs/blob/master/text/0195-associated-items.md [ints]: https://github.com/rust-lang/rfcs/pull/544#issuecomment-68760871 [trpl]: https://doc.rust-lang.org/book/index.html [rbe]: http://rustbyexample.com/ Version 0.12.0 (2014-10-09) ============================= * ~1900 changes, numerous bugfixes * Highlights * The introductory documentation (now called The Rust Guide) has been completely rewritten, as have a number of supplementary guides. * Rust's package manager, Cargo, continues to improve and is sometimes considered to be quite awesome. * Many API's in `std` have been reviewed and updated for consistency with the in-development Rust coding guidelines. The standard library documentation tracks stabilization progress. * Minor libraries have been moved out-of-tree to the rust-lang org on GitHub: uuid, semver, glob, num, hexfloat, fourcc. They can be installed with Cargo. * Lifetime elision allows lifetime annotations to be left off of function declarations in many common scenarios. * Rust now works on 64-bit Windows. * Language * Indexing can be overloaded with the `Index` and `IndexMut` traits. * The `if let` construct takes a branch only if the `let` pattern matches, currently behind the 'if_let' feature gate. * 'where clauses', a more flexible syntax for specifying trait bounds that is more aesthetic, have been added for traits and free functions. Where clauses will in the future make it possible to constrain associated types, which would be impossible with the existing syntax. * A new slicing syntax (e.g. `[0..4]`) has been introduced behind the 'slicing_syntax' feature gate, and can be overloaded with the `Slice` or `SliceMut` traits. * The syntax for matching of sub-slices has been changed to use a postfix `..` instead of prefix (.e.g. `[a, b, c..]`), for consistency with other uses of `..` and to future-proof potential additional uses of the syntax. * The syntax for matching inclusive ranges in patterns has changed from `0..3` to `0...4` to be consistent with the exclusive range syntax for slicing. * Matching of sub-slices in non-tail positions (e.g. `[a.., b, c]`) has been put behind the 'advanced_slice_patterns' feature gate and may be removed in the future. * Components of tuples and tuple structs can be extracted using the `value.0` syntax, currently behind the `tuple_indexing` feature gate. * The `#[crate_id]` attribute is no longer supported; versioning is handled by the package manager. * Renaming crate imports are now written `extern crate foo as bar` instead of `extern crate bar = foo`. * Renaming use statements are now written `use foo as bar` instead of `use bar = foo`. * `let` and `match` bindings and argument names in macros are now hygienic. * The new, more efficient, closure types ('unboxed closures') have been added under a feature gate, 'unboxed_closures'. These will soon replace the existing closure types, once higher-ranked trait lifetimes are added to the language. * `move` has been added as a keyword, for indicating closures that capture by value. * Mutation and assignment is no longer allowed in pattern guards. * Generic structs and enums can now have trait bounds. * The `Share` trait is now called `Sync` to free up the term 'shared' to refer to 'shared reference' (the default reference type. * Dynamically-sized types have been mostly implemented, unifying the behavior of fat-pointer types with the rest of the type system. * As part of dynamically-sized types, the `Sized` trait has been introduced, which qualifying types implement by default, and which type parameters expect by default. To specify that a type parameter does not need to be sized, write ``. Most types are `Sized`, notable exceptions being unsized arrays (`[T]`) and trait types. * Closures can return `!`, as in `|| -> !` or `proc() -> !`. * Lifetime bounds can now be applied to type parameters and object types. * The old, reference counted GC type, `Gc` which was once denoted by the `@` sigil, has finally been removed. GC will be revisited in the future. * Libraries * Library documentation has been improved for a number of modules. * Bit-vectors, collections::bitv has been modernized. * The url crate is deprecated in favor of http://github.com/servo/rust-url, which can be installed with Cargo. * Most I/O stream types can be cloned and subsequently closed from a different thread. * A `std::time::Duration` type has been added for use in I/O methods that rely on timers, as well as in the 'time' crate's `Timespec` arithmetic. * The runtime I/O abstraction layer that enabled the green thread scheduler to do non-thread-blocking I/O has been removed, along with the libuv-based implementation employed by the green thread scheduler. This will greatly simplify the future I/O work. * `collections::btree` has been rewritten to have a more idiomatic and efficient design. * Tooling * rustdoc output now indicates the stability levels of API's. * The `--crate-name` flag can specify the name of the crate being compiled, like `#[crate_name]`. * The `-C metadata` specifies additional metadata to hash into symbol names, and `-C extra-filename` specifies additional information to put into the output filename, for use by the package manager for versioning. * debug info generation has continued to improve and should be more reliable under both gdb and lldb. * rustc has experimental support for compiling in parallel using the `-C codegen-units` flag. * rustc no longer encodes rpath information into binaries by default. * Misc * Stack usage has been optimized with LLVM lifetime annotations. * Official Rust binaries on Linux are more compatible with older kernels and distributions, built on CentOS 5.10. Version 0.11.0 (2014-07-02) ========================== * ~1700 changes, numerous bugfixes * Language * ~[T] has been removed from the language. This type is superseded by the Vec type. * ~str has been removed from the language. This type is superseded by the String type. * ~T has been removed from the language. This type is superseded by the Box type. * @T has been removed from the language. This type is superseded by the standard library's std::gc::Gc type. * Struct fields are now all private by default. * Vector indices and shift amounts are both required to be a `uint` instead of any integral type. * Byte character, byte string, and raw byte string literals are now all supported by prefixing the normal literal with a `b`. * Multiple ABIs are no longer allowed in an ABI string * The syntax for lifetimes on closures/procedures has been tweaked slightly: `<'a>|A, B|: 'b + K -> T` * Floating point modulus has been removed from the language; however it is still provided by a library implementation. * Private enum variants are now disallowed. * The `priv` keyword has been removed from the language. * A closure can no longer be invoked through a &-pointer. * The `use foo, bar, baz;` syntax has been removed from the language. * The transmute intrinsic no longer works on type parameters. * Statics now allow blocks/items in their definition. * Trait bounds are separated from objects with + instead of : now. * Objects can no longer be read while they are mutably borrowed. * The address of a static is now marked as insignificant unless the #[inline(never)] attribute is placed it. * The #[unsafe_destructor] attribute is now behind a feature gate. * Struct literals are no longer allowed in ambiguous positions such as if, while, match, and for..in. * Declaration of lang items and intrinsics are now feature-gated by default. * Integral literals no longer default to `int`, and floating point literals no longer default to `f64`. Literals must be suffixed with an appropriate type if inference cannot determine the type of the literal. * The Box type is no longer implicitly borrowed to &mut T. * Procedures are now required to not capture borrowed references. * Libraries * The standard library is now a "facade" over a number of underlying libraries. This means that development on the standard library should be speeder due to smaller crates, as well as a clearer line between all dependencies. * A new library, libcore, lives under the standard library's facade which is Rust's "0-assumption" library, suitable for embedded and kernel development for example. * A regex crate has been added to the standard distribution. This crate includes statically compiled regular expressions. * The unwrap/unwrap_err methods on Result require a Show bound for better error messages. * The return types of the std::comm primitives have been centralized around the Result type. * A number of I/O primitives have gained the ability to time out their operations. * A number of I/O primitives have gained the ability to close their reading/writing halves to cancel pending operations. * Reverse iterator methods have been removed in favor of `rev()` on their forward-iteration counterparts. * A bitflags! macro has been added to enable easy interop with C and management of bit flags. * A debug_assert! macro is now provided which is disabled when `--cfg ndebug` is passed to the compiler. * A graphviz crate has been added for creating .dot files. * The std::cast module has been migrated into std::mem. * The std::local_data api has been migrated from freestanding functions to being based on methods. * The Pod trait has been renamed to Copy. * jemalloc has been added as the default allocator for types. * The API for allocating memory has been changed to use proper alignment and sized deallocation * Connecting a TcpStream or binding a TcpListener is now based on a string address and a u16 port. This allows connecting to a hostname as opposed to an IP. * The Reader trait now contains a core method, read_at_least(), which correctly handles many repeated 0-length reads. * The process-spawning API is now centered around a builder-style Command struct. * The :? printing qualifier has been moved from the standard library to an external libdebug crate. * Eq/Ord have been renamed to PartialEq/PartialOrd. TotalEq/TotalOrd have been renamed to Eq/Ord. * The select/plural methods have been removed from format!. The escapes for { and } have also changed from \{ and \} to {{ and }}, respectively. * The TaskBuilder API has been re-worked to be a true builder, and extension traits for spawning native/green tasks have been added. * Tooling * All breaking changes to the language or libraries now have their commit message annotated with `[breaking-change]` to allow for easy discovery of breaking changes. * The compiler will now try to suggest how to annotate lifetimes if a lifetime-related error occurs. * Debug info continues to be improved greatly with general bug fixes and better support for situations like link time optimization (LTO). * Usage of syntax extensions when cross-compiling has been fixed. * Functionality equivalent to GCC & Clang's -ffunction-sections, -fdata-sections and --gc-sections has been enabled by default * The compiler is now stricter about where it will load module files from when a module is declared via `mod foo;`. * The #[phase(syntax)] attribute has been renamed to #[phase(plugin)]. Syntax extensions are now discovered via a "plugin registrar" type which will be extended in the future to other various plugins. * Lints have been restructured to allow for dynamically loadable lints. * A number of rustdoc improvements: * The HTML output has been visually redesigned. * Markdown is now powered by hoedown instead of sundown. * Searching heuristics have been greatly improved. * The search index has been reduced in size by a great amount. * Cross-crate documentation via `pub use` has been greatly improved. * Primitive types are now hyperlinked and documented. * Documentation has been moved from static.rust-lang.org/doc to doc.rust-lang.org * A new sandbox, play.rust-lang.org, is available for running and sharing rust code examples on-line. * Unused attributes are now more robustly warned about. * The dead_code lint now warns about unused struct fields. * Cross-compiling to iOS is now supported. * Cross-compiling to mipsel is now supported. * Stability attributes are now inherited by default and no longer apply to intra-crate usage, only inter-crate usage. * Error message related to non-exhaustive match expressions have been greatly improved. Version 0.10 (2014-04-03) ========================= * ~1500 changes, numerous bugfixes * Language * A new RFC process is now in place for modifying the language. * Patterns with `@`-pointers have been removed from the language. * Patterns with unique vectors (`~[T]`) have been removed from the language. * Patterns with unique strings (`~str`) have been removed from the language. * `@str` has been removed from the language. * `@[T]` has been removed from the language. * `@self` has been removed from the language. * `@Trait` has been removed from the language. * Headers on `~` allocations which contain `@` boxes inside the type for reference counting have been removed. * The semantics around the lifetimes of temporary expressions have changed, see #3511 and #11585 for more information. * Cross-crate syntax extensions are now possible, but feature gated. See #11151 for more information. This includes both `macro_rules!` macros as well as syntax extensions such as `format!`. * New lint modes have been added, and older ones have been turned on to be warn-by-default. * Unnecessary parentheses * Uppercase statics * Camel Case types * Uppercase variables * Publicly visible private types * `#[deriving]` with raw pointers * Unsafe functions can no longer be coerced to closures. * Various obscure macros such as `log_syntax!` are now behind feature gates. * The `#[simd]` attribute is now behind a feature gate. * Visibility is no longer allowed on `extern crate` statements, and unnecessary visibility (`priv`) is no longer allowed on `use` statements. * Trailing commas are now allowed in argument lists and tuple patterns. * The `do` keyword has been removed, it is now a reserved keyword. * Default type parameters have been implemented, but are feature gated. * Borrowed variables through captures in closures are now considered soundly. * `extern mod` is now `extern crate` * The `Freeze` trait has been removed. * The `Share` trait has been added for types that can be shared among threads. * Labels in macros are now hygienic. * Expression/statement macro invocations can be delimited with `{}` now. * Treatment of types allowed in `static mut` locations has been tweaked. * The `*` and `.` operators are now overloadable through the `Deref` and `DerefMut` traits. * `~Trait` and `proc` no longer have `Send` bounds by default. * Partial type hints are now supported with the `_` type marker. * An `Unsafe` type was introduced for interior mutability. It is now considered undefined to transmute from `&T` to `&mut T` without using the `Unsafe` type. * The #[linkage] attribute was implemented for extern statics/functions. * The inner attribute syntax has changed from `#[foo];` to `#![foo]`. * `Pod` was renamed to `Copy`. * Libraries * The `libextra` library has been removed. It has now been decomposed into component libraries with smaller and more focused nuggets of functionality. The full list of libraries can be found on the documentation index page. * std: `std::condition` has been removed. All I/O errors are now propagated through the `Result` type. In order to assist with error handling, a `try!` macro for unwrapping errors with an early return and a lint for unused results has been added. See #12039 for more information. * std: The `vec` module has been renamed to `slice`. * std: A new vector type, `Vec`, has been added in preparation for DST. This will become the only growable vector in the future. * std: `std::io` now has more public-reexports. Types such as `BufferedReader` are now found at `std::io::BufferedReader` instead of `std::io::buffered::BufferedReader`. * std: `print` and `println` are no longer in the prelude, the `print!` and `println!` macros are intended to be used instead. * std: `Rc` now has a `Weak` pointer for breaking cycles, and it no longer attempts to statically prevent cycles. * std: The standard distribution is adopting the policy of pushing failure to the user rather than failing in libraries. Many functions (such as `slice::last()`) now return `Option` instead of `T` + failing. * std: `fmt::Default` has been renamed to `fmt::Show`, and it now has a new deriving mode: `#[deriving(Show)]`. * std: `ToStr` is now implemented for all types implementing `Show`. * std: The formatting trait methods now take `&self` instead of `&T` * std: The `invert()` method on iterators has been renamed to `rev()` * std: `std::num` has seen a reduction in the genericity of its traits, consolidating functionality into a few core traits. * std: Backtraces are now printed on task failure if the environment variable `RUST_BACKTRACE` is present. * std: Naming conventions for iterators have been standardized. More details can be found on the wiki's style guide. * std: `eof()` has been removed from the `Reader` trait. Specific types may still implement the function. * std: Networking types are now cloneable to allow simultaneous reads/writes. * std: `assert_approx_eq!` has been removed * std: The `e` and `E` formatting specifiers for floats have been added to print them in exponential notation. * std: The `Times` trait has been removed * std: Indications of variance and opting out of builtin bounds is done through marker types in `std::kinds::marker` now * std: `hash` has been rewritten, `IterBytes` has been removed, and `#[deriving(Hash)]` is now possible. * std: `SharedChan` has been removed, `Sender` is now cloneable. * std: `Chan` and `Port` were renamed to `Sender` and `Receiver`. * std: `Chan::new` is now `channel()`. * std: A new synchronous channel type has been implemented. * std: A `select!` macro is now provided for selecting over `Receiver`s. * std: `hashmap` and `trie` have been moved to `libcollections` * std: `run` has been rolled into `io::process` * std: `assert_eq!` now uses `{}` instead of `{:?}` * std: The equality and comparison traits have seen some reorganization. * std: `rand` has moved to `librand`. * std: `to_{lower,upper}case` has been implemented for `char`. * std: Logging has been moved to `liblog`. * collections: `HashMap` has been rewritten for higher performance and less memory usage. * native: The default runtime is now `libnative`. If `libgreen` is desired, it can be booted manually. The runtime guide has more information and examples. * native: All I/O functionality except signals has been implemented. * green: Task spawning with `libgreen` has been optimized with stack caching and various trimming of code. * green: Tasks spawned by `libgreen` now have an unmapped guard page. * sync: The `extra::sync` module has been updated to modern rust (and moved to the `sync` library), tweaking and improving various interfaces while dropping redundant functionality. * sync: A new `Barrier` type has been added to the `sync` library. * sync: An efficient mutex for native and green tasks has been implemented. * serialize: The `base64` module has seen some improvement. It treats newlines better, has non-string error values, and has seen general cleanup. * fourcc: A `fourcc!` macro was introduced * hexfloat: A `hexfloat!` macro was implemented for specifying floats via a hexadecimal literal. * Tooling * `rustpkg` has been deprecated and removed from the main repository. Its replacement, `cargo`, is under development. * Nightly builds of rust are now available * The memory usage of rustc has been improved many times throughout this release cycle. * The build process supports disabling rpath support for the rustc binary itself. * Code generation has improved in some cases, giving more information to the LLVM optimization passes to enable more extensive optimizations. * Debuginfo compatibility with lldb on OSX has been restored. * The master branch is now gated on an android bot, making building for android much more reliable. * Output flags have been centralized into one `--emit` flag. * Crate type flags have been centralized into one `--crate-type` flag. * Codegen flags have been consolidated behind a `-C` flag. * Linking against outdated crates now has improved error messages. * Error messages with lifetimes will often suggest how to annotate the function to fix the error. * Many more types are documented in the standard library, and new guides were written. * Many `rustdoc` improvements: * code blocks are syntax highlighted. * render standalone markdown files. * the --test flag tests all code blocks by default. * exported macros are displayed. * reexported types have their documentation inlined at the location of the first reexport. * search works across crates that have been rendered to the same output directory. Version 0.9 (2014-01-09) ========================== * ~1800 changes, numerous bugfixes * Language * The `float` type has been removed. Use `f32` or `f64` instead. * A new facility for enabling experimental features (feature gating) has been added, using the crate-level `#[feature(foo)]` attribute. * Managed boxes (@) are now behind a feature gate (`#[feature(managed_boxes)]`) in preparation for future removal. Use the standard library's `Gc` or `Rc` types instead. * `@mut` has been removed. Use `std::cell::{Cell, RefCell}` instead. * Jumping back to the top of a loop is now done with `continue` instead of `loop`. * Strings can no longer be mutated through index assignment. * Raw strings can be created via the basic `r"foo"` syntax or with matched hash delimiters, as in `r###"foo"###`. * `~fn` is now written `proc (args) -> retval { ... }` and may only be called once. * The `&fn` type is now written `|args| -> ret` to match the literal form. * `@fn`s have been removed. * `do` only works with procs in order to make it obvious what the cost of `do` is. * Single-element tuple-like structs can no longer be dereferenced to obtain the inner value. A more comprehensive solution for overloading the dereference operator will be provided in the future. * The `#[link(...)]` attribute has been replaced with `#[crate_id = "name#vers"]`. * Empty `impl`s must be terminated with empty braces and may not be terminated with a semicolon. * Keywords are no longer allowed as lifetime names; the `self` lifetime no longer has any special meaning. * The old `fmt!` string formatting macro has been removed. * `printf!` and `printfln!` (old-style formatting) removed in favor of `print!` and `println!`. * `mut` works in patterns now, as in `let (mut x, y) = (1, 2);`. * The `extern mod foo (name = "bar")` syntax has been removed. Use `extern mod foo = "bar"` instead. * New reserved keywords: `alignof`, `offsetof`, `sizeof`. * Macros can have attributes. * Macros can expand to items with attributes. * Macros can expand to multiple items. * The `asm!` macro is feature-gated (`#[feature(asm)]`). * Comments may be nested. * Values automatically coerce to trait objects they implement, without an explicit `as`. * Enum discriminants are no longer an entire word but as small as needed to contain all the variants. The `repr` attribute can be used to override the discriminant size, as in `#[repr(int)]` for integer-sized, and `#[repr(C)]` to match C enums. * Non-string literals are not allowed in attributes (they never worked). * The FFI now supports variadic functions. * Octal numeric literals, as in `0o7777`. * The `concat!` syntax extension performs compile-time string concatenation. * The `#[fixed_stack_segment]` and `#[rust_stack]` attributes have been removed as Rust no longer uses segmented stacks. * Non-ascii identifiers are feature-gated (`#[feature(non_ascii_idents)]`). * Ignoring all fields of an enum variant or tuple-struct is done with `..`, not `*`; ignoring remaining fields of a struct is also done with `..`, not `_`; ignoring a slice of a vector is done with `..`, not `.._`. * `rustc` supports the "win64" calling convention via `extern "win64"`. * `rustc` supports the "system" calling convention, which defaults to the preferred convention for the target platform, "stdcall" on 32-bit Windows, "C" elsewhere. * The `type_overflow` lint (default: warn) checks literals for overflow. * The `unsafe_block` lint (default: allow) checks for usage of `unsafe`. * The `attribute_usage` lint (default: warn) warns about unknown attributes. * The `unknown_features` lint (default: warn) warns about unknown feature gates. * The `dead_code` lint (default: warn) checks for dead code. * Rust libraries can be linked statically to one another * `#[link_args]` is behind the `link_args` feature gate. * Native libraries are now linked with `#[link(name = "foo")]` * Native libraries can be statically linked to a rust crate (`#[link(name = "foo", kind = "static")]`). * Native OS X frameworks are now officially supported (`#[link(name = "foo", kind = "framework")]`). * The `#[thread_local]` attribute creates thread-local (not task-local) variables. Currently behind the `thread_local` feature gate. * The `return` keyword may be used in closures. * Types that can be copied via a memcpy implement the `Pod` kind. * The `cfg` attribute can now be used on struct fields and enum variants. * Libraries * std: The `option` and `result` API's have been overhauled to make them simpler, more consistent, and more composable. * std: The entire `std::io` module has been replaced with one that is more comprehensive and that properly interfaces with the underlying scheduler. File, TCP, UDP, Unix sockets, pipes, and timers are all implemented. * std: `io::util` contains a number of useful implementations of `Reader` and `Writer`, including `NullReader`, `NullWriter`, `ZeroReader`, `TeeReader`. * std: The reference counted pointer type `extra::rc` moved into std. * std: The `Gc` type in the `gc` module will replace `@` (it is currently just a wrapper around it). * std: The `Either` type has been removed. * std: `fmt::Default` can be implemented for any type to provide default formatting to the `format!` macro, as in `format!("{}", myfoo)`. * std: The `rand` API continues to be tweaked. * std: The `rust_begin_unwind` function, useful for inserting breakpoints on failure in gdb, is now named `rust_fail`. * std: The `each_key` and `each_value` methods on `HashMap` have been replaced by the `keys` and `values` iterators. * std: Functions dealing with type size and alignment have moved from the `sys` module to the `mem` module. * std: The `path` module was written and API changed. * std: `str::from_utf8` has been changed to cast instead of allocate. * std: `starts_with` and `ends_with` methods added to vectors via the `ImmutableEqVector` trait, which is in the prelude. * std: Vectors can be indexed with the `get_opt` method, which returns `None` if the index is out of bounds. * std: Task failure no longer propagates between tasks, as the model was complex, expensive, and incompatible with thread-based tasks. * std: The `Any` type can be used for dynamic typing. * std: `~Any` can be passed to the `fail!` macro and retrieved via `task::try`. * std: Methods that produce iterators generally do not have an `_iter` suffix now. * std: `cell::Cell` and `cell::RefCell` can be used to introduce mutability roots (mutable fields, etc.). Use instead of e.g. `@mut`. * std: `util::ignore` renamed to `prelude::drop`. * std: Slices have `sort` and `sort_by` methods via the `MutableVector` trait. * std: `vec::raw` has seen a lot of cleanup and API changes. * std: The standard library no longer includes any C++ code, and very minimal C, eliminating the dependency on libstdc++. * std: Runtime scheduling and I/O functionality has been factored out into extensible interfaces and is now implemented by two different crates: libnative, for native threading and I/O; and libgreen, for green threading and I/O. This paves the way for using the standard library in more limited embedded environments. * std: The `comm` module has been rewritten to be much faster, have a simpler, more consistent API, and to work for both native and green threading. * std: All libuv dependencies have been moved into the rustuv crate. * native: New implementations of runtime scheduling on top of OS threads. * native: New native implementations of TCP, UDP, file I/O, process spawning, and other I/O. * green: The green thread scheduler and message passing types are almost entirely lock-free. * extra: The `flatpipes` module had bitrotted and was removed. * extra: All crypto functions have been removed and Rust now has a policy of not reimplementing crypto in the standard library. In the future crypto will be provided by external crates with bindings to established libraries. * extra: `c_vec` has been modernized. * extra: The `sort` module has been removed. Use the `sort` method on mutable slices. * Tooling * The `rust` and `rusti` commands have been removed, due to lack of maintenance. * `rustdoc` was completely rewritten. * `rustdoc` can test code examples in documentation. * `rustpkg` can test packages with the argument, 'test'. * `rustpkg` supports arbitrary dependencies, including C libraries. * `rustc`'s support for generating debug info is improved again. * `rustc` has better error reporting for unbalanced delimiters. * `rustc`'s JIT support was removed due to bitrot. * Executables and static libraries can be built with LTO (-Z lto) * `rustc` adds a `--dep-info` flag for communicating dependencies to build tools. Version 0.8 (2013-09-26) ============================ * ~2200 changes, numerous bugfixes * Language * The `for` loop syntax has changed to work with the `Iterator` trait. * At long last, unwinding works on Windows. * Default methods are ready for use. * Many trait inheritance bugs fixed. * Owned and borrowed trait objects work more reliably. * `copy` is no longer a keyword. It has been replaced by the `Clone` trait. * rustc can omit emission of code for the `debug!` macro if it is passed `--cfg ndebug` * mod.rs is now "blessed". When loading `mod foo;`, rustc will now look for foo.rs, then foo/mod.rs, and will generate an error when both are present. * Strings no longer contain trailing nulls. The new `std::c_str` module provides new mechanisms for converting to C strings. * The type of foreign functions is now `extern "C" fn` instead of `*u8'. * The FFI has been overhauled such that foreign functions are called directly, instead of through a stack-switching wrapper. * Calling a foreign function must be done through a Rust function with the `#[fixed_stack_segment]` attribute. * The `externfn!` macro can be used to declare both a foreign function and a `#[fixed_stack_segment]` wrapper at once. * `pub` and `priv` modifiers on `extern` blocks are no longer parsed. * `unsafe` is no longer allowed on extern fns - they are all unsafe. * `priv` is disallowed everywhere except for struct fields and enum variants. * `&T` (besides `&'static T`) is no longer allowed in `@T`. * `ref` bindings in irrefutable patterns work correctly now. * `char` is now prevented from containing invalid code points. * Casting to `bool` is no longer allowed. * `\0` is now accepted as an escape in chars and strings. * `yield` is a reserved keyword. * `typeof` is a reserved keyword. * Crates may be imported by URL with `extern mod foo = "url";`. * Explicit enum discriminants may be given as uints as in `enum E { V = 0u }` * Static vectors can be initialized with repeating elements, e.g. `static foo: [u8, .. 100]: [0, .. 100];`. * Static structs can be initialized with functional record update, e.g. `static foo: Foo = Foo { a: 5, .. bar };`. * `cfg!` can be used to conditionally execute code based on the crate configuration, similarly to `#[cfg(...)]`. * The `unnecessary_qualification` lint detects unneeded module prefixes (default: allow). * Arithmetic operations have been implemented on the SIMD types in `std::unstable::simd`. * Exchange allocation headers were removed, reducing memory usage. * `format!` implements a completely new, extensible, and higher-performance string formatting system. It will replace `fmt!`. * `print!` and `println!` write formatted strings (using the `format!` extension) to stdout. * `write!` and `writeln!` write formatted strings (using the `format!` extension) to the new Writers in `std::rt::io`. * The library section in which a function or static is placed may be specified with `#[link_section = "..."]`. * The `proto!` syntax extension for defining bounded message protocols was removed. * `macro_rules!` is hygienic for `let` declarations. * The `#[export_name]` attribute specifies the name of a symbol. * `unreachable!` can be used to indicate unreachable code, and fails if executed. * Libraries * std: Transitioned to the new runtime, written in Rust. * std: Added an experimental I/O library, `rt::io`, based on the new runtime. * std: A new generic `range` function was added to the prelude, replacing `uint::range` and friends. * std: `range_rev` no longer exists. Since range is an iterator it can be reversed with `range(lo, hi).invert()`. * std: The `chain` method on option renamed to `and_then`; `unwrap_or_default` renamed to `unwrap_or`. * std: The `iterator` module was renamed to `iter`. * std: Integral types now support the `checked_add`, `checked_sub`, and `checked_mul` operations for detecting overflow. * std: Many methods in `str`, `vec`, `option, `result` were renamed for consistency. * std: Methods are standardizing on conventions for casting methods: `to_foo` for copying, `into_foo` for moving, `as_foo` for temporary and cheap casts. * std: The `CString` type in `c_str` provides new ways to convert to and from C strings. * std: `DoubleEndedIterator` can yield elements in two directions. * std: The `mut_split` method on vectors partitions an `&mut [T]` into two splices. * std: `str::from_bytes` renamed to `str::from_utf8`. * std: `pop_opt` and `shift_opt` methods added to vectors. * std: The task-local data interface no longer uses @, and keys are no longer function pointers. * std: The `swap_unwrap` method of `Option` renamed to `take_unwrap`. * std: Added `SharedPort` to `comm`. * std: `Eq` has a default method for `ne`; only `eq` is required in implementations. * std: `Ord` has default methods for `le`, `gt` and `ge`; only `lt` is required in implementations. * std: `is_utf8` performance is improved, impacting many string functions. * std: `os::MemoryMap` provides cross-platform mmap. * std: `ptr::offset` is now unsafe, but also more optimized. Offsets that are not 'in-bounds' are considered undefined. * std: Many freestanding functions in `vec` removed in favor of methods. * std: Many freestanding functions on scalar types removed in favor of methods. * std: Many options to task builders were removed since they don't make sense in the new scheduler design. * std: More containers implement `FromIterator` so can be created by the `collect` method. * std: More complete atomic types in `unstable::atomics`. * std: `comm::PortSet` removed. * std: Mutating methods in the `Set` and `Map` traits have been moved into the `MutableSet` and `MutableMap` traits. `Container::is_empty`, `Map::contains_key`, `MutableMap::insert`, and `MutableMap::remove` have default implementations. * std: Various `from_str` functions were removed in favor of a generic `from_str` which is available in the prelude. * std: `util::unreachable` removed in favor of the `unreachable!` macro. * extra: `dlist`, the doubly-linked list was modernized. * extra: Added a `hex` module with `ToHex` and `FromHex` traits. * extra: Added `glob` module, replacing `std::os::glob`. * extra: `rope` was removed. * extra: `deque` was renamed to `ringbuf`. `RingBuf` implements `Deque`. * extra: `net`, and `timer` were removed. The experimental replacements are `std::rt::io::net` and `std::rt::io::timer`. * extra: Iterators implemented for `SmallIntMap`. * extra: Iterators implemented for `Bitv` and `BitvSet`. * extra: `SmallIntSet` removed. Use `BitvSet`. * extra: Performance of JSON parsing greatly improved. * extra: `semver` updated to SemVer 2.0.0. * extra: `term` handles more terminals correctly. * extra: `dbg` module removed. * extra: `par` module removed. * extra: `future` was cleaned up, with some method renames. * extra: Most free functions in `getopts` were converted to methods. * Other * rustc's debug info generation (`-Z debug-info`) is greatly improved. * rustc accepts `--target-cpu` to compile to a specific CPU architecture, similarly to gcc's `--march` flag. * rustc's performance compiling small crates is much better. * rustpkg has received many improvements. * rustpkg supports git tags as package IDs. * rustpkg builds into target-specific directories so it can be used for cross-compiling. * The number of concurrent test tasks is controlled by the environment variable RUST_TEST_TASKS. * The test harness can now report metrics for benchmarks. * All tools have man pages. * Programs compiled with `--test` now support the `-h` and `--help` flags. * The runtime uses jemalloc for allocations. * Segmented stacks are temporarily disabled as part of the transition to the new runtime. Stack overflows are possible! * A new documentation backend, rustdoc_ng, is available for use. It is still invoked through the normal `rustdoc` command. Version 0.7 (2013-07-03) ======================= * ~2000 changes, numerous bugfixes * Language * `impl`s no longer accept a visibility qualifier. Put them on methods instead. * The borrow checker has been rewritten with flow-sensitivity, fixing many bugs and inconveniences. * The `self` parameter no longer implicitly means `&'self self`, and can be explicitly marked with a lifetime. * Overloadable compound operators (`+=`, etc.) have been temporarily removed due to bugs. * The `for` loop protocol now requires `for`-iterators to return `bool` so they compose better. * The `Durable` trait is replaced with the `'static` bounds. * Trait default methods work more often. * Structs with the `#[packed]` attribute have byte alignment and no padding between fields. * Type parameters bound by `Copy` must now be copied explicitly with the `copy` keyword. * It is now illegal to move out of a dereferenced unsafe pointer. * `Option<~T>` is now represented as a nullable pointer. * `@mut` does dynamic borrow checks correctly. * The `main` function is only detected at the topmost level of the crate. The `#[main]` attribute is still valid anywhere. * Struct fields may no longer be mutable. Use inherited mutability. * The `#[no_send]` attribute makes a type that would otherwise be `Send`, not. * The `#[no_freeze]` attribute makes a type that would otherwise be `Freeze`, not. * Unbounded recursion will abort the process after reaching the limit specified by the `RUST_MAX_STACK` environment variable (default: 1GB). * The `vecs_implicitly_copyable` lint mode has been removed. Vectors are never implicitly copyable. * `#[static_assert]` makes compile-time assertions about static bools. * At long last, 'argument modes' no longer exist. * The rarely used `use mod` statement no longer exists. * Syntax extensions * `fail!` and `assert!` accept `~str`, `&'static str` or `fmt!`-style argument list. * `Encodable`, `Decodable`, `Ord`, `TotalOrd`, `TotalEq`, `DeepClone`, `Rand`, `Zero` and `ToStr` can all be automatically derived with `#[deriving(...)]`. * The `bytes!` macro returns a vector of bytes for string, u8, char, and unsuffixed integer literals. * Libraries * The `core` crate was renamed to `std`. * The `std` crate was renamed to `extra`. * More and improved documentation. * std: `iterator` module for external iterator objects. * Many old-style (internal, higher-order function) iterators replaced by implementations of `Iterator`. * std: Many old internal vector and string iterators, incl. `any`, `all`. removed. * std: The `finalize` method of `Drop` renamed to `drop`. * std: The `drop` method now takes `&mut self` instead of `&self`. * std: The prelude no longer reexports any modules, only types and traits. * std: Prelude additions: `print`, `println`, `FromStr`, `ApproxEq`, `Equiv`, `Iterator`, `IteratorUtil`, many numeric traits, many tuple traits. * std: New numeric traits: `Fractional`, `Real`, `RealExt`, `Integer`, `Ratio`, `Algebraic`, `Trigonometric`, `Exponential`, `Primitive`. * std: Tuple traits and accessors defined for up to 12-tuples, e.g. `(0, 1, 2).n2()` or `(0, 1, 2).n2_ref()`. * std: Many types implement `Clone`. * std: `path` type renamed to `Path`. * std: `mut` module and `Mut` type removed. * std: Many standalone functions removed in favor of methods and iterators in `vec`, `str`. In the future methods will also work as functions. * std: `reinterpret_cast` removed. Use `transmute`. * std: ascii string handling in `std::ascii`. * std: `Rand` is implemented for ~/@. * std: `run` module for spawning processes overhauled. * std: Various atomic types added to `unstable::atomic`. * std: Various types implement `Zero`. * std: `LinearMap` and `LinearSet` renamed to `HashMap` and `HashSet`. * std: Borrowed pointer functions moved from `ptr` to `borrow`. * std: Added `os::mkdir_recursive`. * std: Added `os::glob` function performs filesystems globs. * std: `FuzzyEq` renamed to `ApproxEq`. * std: `Map` now defines `pop` and `swap` methods. * std: `Cell` constructors converted to static methods. * extra: `rc` module adds the reference counted pointers, `Rc` and `RcMut`. * extra: `flate` module moved from `std` to `extra`. * extra: `fileinput` module for iterating over a series of files. * extra: `Complex` number type and `complex` module. * extra: `Rational` number type and `rational` module. * extra: `BigInt`, `BigUint` implement numeric and comparison traits. * extra: `term` uses terminfo now, is more correct. * extra: `arc` functions converted to methods. * extra: Implementation of fixed output size variations of SHA-2. * Tooling * `unused_variable` lint mode for unused variables (default: warn). * `unused_unsafe` lint mode for detecting unnecessary `unsafe` blocks (default: warn). * `unused_mut` lint mode for identifying unused `mut` qualifiers (default: warn). * `dead_assignment` lint mode for unread variables (default: warn). * `unnecessary_allocation` lint mode detects some heap allocations that are immediately borrowed so could be written without allocating (default: warn). * `missing_doc` lint mode (default: allow). * `unreachable_code` lint mode (default: warn). * The `rusti` command has been rewritten and a number of bugs addressed. * rustc outputs in color on more terminals. * rustc accepts a `--link-args` flag to pass arguments to the linker. * rustc accepts a `-Z print-link-args` flag for debugging linkage. * Compiling with `-g` will make the binary record information about dynamic borrowcheck failures for debugging. * rustdoc has a nicer stylesheet. * Various improvements to rustdoc. * Improvements to rustpkg (see the detailed release notes). Version 0.6 (2013-04-03) ======================== * ~2100 changes, numerous bugfixes * Syntax changes * The self type parameter in traits is now spelled `Self` * The `self` parameter in trait and impl methods must now be explicitly named (for example: `fn f(&self) { }`). Implicit self is deprecated. * Static methods no longer require the `static` keyword and instead are distinguished by the lack of a `self` parameter * Replaced the `Durable` trait with the `'static` lifetime * The old closure type syntax with the trailing sigil has been removed in favor of the more consistent leading sigil * `super` is a keyword, and may be prefixed to paths * Trait bounds are separated with `+` instead of whitespace * Traits are implemented with `impl Trait for Type` instead of `impl Type: Trait` * Lifetime syntax is now `&'l foo` instead of `&l/foo` * The `export` keyword has finally been removed * The `move` keyword has been removed (see "Semantic changes") * The interior mutability qualifier on vectors, `[mut T]`, has been removed. Use `&mut [T]`, etc. * `mut` is no longer valid in `~mut T`. Use inherited mutability * `fail` is no longer a keyword. Use `fail!()` * `assert` is no longer a keyword. Use `assert!()` * `log` is no longer a keyword. use `debug!`, etc. * 1-tuples may be represented as `(T,)` * Struct fields may no longer be `mut`. Use inherited mutability, `@mut T`, `core::mut` or `core::cell` * `extern mod { ... }` is no longer valid syntax for foreign function modules. Use extern blocks: `extern { ... }` * Newtype enums removed. Use tuple-structs. * Trait implementations no longer support visibility modifiers * Pattern matching over vectors improved and expanded * `const` renamed to `static` to correspond to lifetime name, and make room for future `static mut` unsafe mutable globals. * Replaced `#[deriving_eq]` with `#[deriving(Eq)]`, etc. * `Clone` implementations can be automatically generated with `#[deriving(Clone)]` * Casts to traits must use a pointer sigil, e.g. `@foo as @Bar` instead of `foo as Bar`. * Fixed length vector types are now written as `[int, .. 3]` instead of `[int * 3]`. * Fixed length vector types can express the length as a constant expression. (ex: `[int, .. GL_BUFFER_SIZE - 2]`) * Semantic changes * Types with owned pointers or custom destructors move by default, eliminating the `move` keyword * All foreign functions are considered unsafe * &mut is now unaliasable * Writes to borrowed @mut pointers are prevented dynamically * () has size 0 * The name of the main function can be customized using #[main] * The default type of an inferred closure is &fn instead of @fn * `use` statements may no longer be "chained" - they cannot import identifiers imported by previous `use` statements * `use` statements are crate relative, importing from the "top" of the crate by default. Paths may be prefixed with `super::` or `self::` to change the search behavior. * Method visibility is inherited from the implementation declaration * Structural records have been removed * Many more types can be used in static items, including enums 'static-lifetime pointers and vectors * Pattern matching over vectors improved and expanded * Typechecking of closure types has been overhauled to improve inference and eliminate unsoundness * Macros leave scope at the end of modules, unless that module is tagged with #[macro_escape] * Libraries * Added big integers to `std::bigint` * Removed `core::oldcomm` module * Added pipe-based `core::comm` module * Numeric traits have been reorganized under `core::num` * `vec::slice` finally returns a slice * `debug!` and friends don't require a format string, e.g. `debug!(Foo)` * Containers reorganized around traits in `core::container` * `core::dvec` removed, `~[T]` is a drop-in replacement * `core::send_map` renamed to `core::hashmap` * `std::map` removed; replaced with `core::hashmap` * `std::treemap` reimplemented as an owned balanced tree * `std::deque` and `std::smallintmap` reimplemented as owned containers * `core::trie` added as a fast ordered map for integer keys * Set types added to `core::hashmap`, `core::trie` and `std::treemap` * `Ord` split into `Ord` and `TotalOrd`. `Ord` is still used to overload the comparison operators, whereas `TotalOrd` is used by certain container types * Other * Replaced the 'cargo' package manager with 'rustpkg' * Added all-purpose 'rust' tool * `rustc --test` now supports benchmarks with the `#[bench]` attribute * rustc now *attempts* to offer spelling suggestions * Improved support for ARM and Android * Preliminary MIPS backend * Improved foreign function ABI implementation for x86, x86_64 * Various memory usage improvements * Rust code may be embedded in foreign code under limited circumstances * Inline assembler supported by new asm!() syntax extension. Version 0.5 (2012-12-21) =========================== * ~900 changes, numerous bugfixes * Syntax changes * Removed `<-` move operator * Completed the transition from the `#fmt` extension syntax to `fmt!` * Removed old fixed length vector syntax - `[T]/N` * New token-based quasi-quoters, `quote_tokens!`, `quote_expr!`, etc. * Macros may now expand to items and statements * `a.b()` is always parsed as a method call, never as a field projection * `Eq` and `IterBytes` implementations can be automatically generated with `#[deriving_eq]` and `#[deriving_iter_bytes]` respectively * Removed the special crate language for `.rc` files * Function arguments may consist of any irrefutable pattern * Semantic changes * `&` and `~` pointers may point to objects * Tuple structs - `struct Foo(Bar, Baz)`. Will replace newtype enums. * Enum variants may be structs * Destructors can be added to all nominal types with the Drop trait * Structs and nullary enum variants may be constants * Values that cannot be implicitly copied are now automatically moved without writing `move` explicitly * `&T` may now be coerced to `*T` * Coercions happen in `let` statements as well as function calls * `use` statements now take crate-relative paths * The module and type namespaces have been merged so that static method names can be resolved under the trait in which they are declared * Improved support for language features * Trait inheritance works in many scenarios * More support for explicit self arguments in methods - `self`, `&self` `@self`, and `~self` all generally work as expected * Static methods work in more situations * Experimental: Traits may declare default methods for the implementations to use * Libraries * New condition handling system in `core::condition` * Timsort added to `std::sort` * New priority queue, `std::priority_queue` * Pipes for serializable types, `std::flatpipes' * Serialization overhauled to be trait-based * Expanded `getopts` definitions * Moved futures to `std` * More functions are pure now * `core::comm` renamed to `oldcomm`. Still deprecated * `rustdoc` and `cargo` are libraries now * Misc * Added a preliminary REPL, `rusti` * License changed from MIT to dual MIT/APL2 Version 0.4 (2012-10-15) ========================== * ~2000 changes, numerous bugfixes * Syntax * All keywords are now strict and may not be used as identifiers anywhere * Keyword removal: 'again', 'import', 'check', 'new', 'owned', 'send', 'of', 'with', 'to', 'class'. * Classes are replaced with simpler structs * Explicit method self types * `ret` became `return` and `alt` became `match` * `import` is now `use`; `use is now `extern mod` * `extern mod { ... }` is now `extern { ... }` * `use mod` is the recommended way to import modules * `pub` and `priv` replace deprecated export lists * The syntax of `match` pattern arms now uses fat arrow (=>) * `main` no longer accepts an args vector; use `os::args` instead * Semantics * Trait implementations are now coherent, ala Haskell typeclasses * Trait methods may be static * Argument modes are deprecated * Borrowed pointers are much more mature and recommended for use * Strings and vectors in the static region are stored in constant memory * Typestate was removed * Resolution rewritten to be more reliable * Support for 'dual-mode' data structures (freezing and thawing) * Libraries * Most binary operators can now be overloaded via the traits in `core::ops' * `std::net::url` for representing URLs * Sendable hash maps in `core::send_map` * `core::task' gained a (currently unsafe) task-local storage API * Concurrency * An efficient new intertask communication primitive called the pipe, along with a number of higher-level channel types, in `core::pipes` * `std::arc`, an atomically reference counted, immutable, shared memory type * `std::sync`, various exotic synchronization tools based on arcs and pipes * Futures are now based on pipes and sendable * More robust linked task failure * Improved task builder API * Other * Improved error reporting * Preliminary JIT support * Preliminary work on precise GC * Extensive architectural improvements to rustc * Begun a transition away from buggy C++-based reflection (shape) code to Rust-based (visitor) code * All hash functions and tables converted to secure, randomized SipHash Version 0.3 (2012-07-12) ======================== * ~1900 changes, numerous bugfixes * New coding conveniences * Integer-literal suffix inference * Per-item control over warnings, errors * #[cfg(windows)] and #[cfg(unix)] attributes * Documentation comments * More compact closure syntax * 'do' expressions for treating higher-order functions as control structures * *-patterns (wildcard extended to all constructor fields) * Semantic cleanup * Name resolution pass and exhaustiveness checker rewritten * Region pointers and borrow checking supersede alias analysis * Init-ness checking is now provided by a region-based liveness pass instead of the typestate pass; same for last-use analysis * Extensive work on region pointers * Experimental new language features * Slices and fixed-size, interior-allocated vectors * #!-comments for lang versioning, shell execution * Destructors and iface implementation for classes; type-parameterized classes and class methods * 'const' type kind for types that can be used to implement shared-memory concurrency patterns * Type reflection * Removal of various obsolete features * Keywords: 'be', 'prove', 'syntax', 'note', 'mutable', 'bind', 'crust', 'native' (now 'extern'), 'cont' (now 'again') * Constructs: do-while loops ('do' repurposed), fn binding, resources (replaced by destructors) * Compiler reorganization * Syntax-layer of compiler split into separate crate * Clang (from LLVM project) integrated into build * Typechecker split into sub-modules * New library code * New time functions * Extension methods for many built-in types * Arc: atomic-refcount read-only / exclusive-use shared cells * Par: parallel map and search routines * Extensive work on libuv interface * Much vector code moved to libraries * Syntax extensions: #line, #col, #file, #mod, #stringify, #include, #include_str, #include_bin * Tool improvements * Cargo automatically resolves dependencies Version 0.2 (2012-03-29) ========================= * >1500 changes, numerous bugfixes * New docs and doc tooling * New port: FreeBSD x86_64 * Compilation model enhancements * Generics now specialized, multiply instantiated * Functions now inlined across separate crates * Scheduling, stack and threading fixes * Noticeably improved message-passing performance * Explicit schedulers * Callbacks from C * Helgrind clean * Experimental new language features * Operator overloading * Region pointers * Classes * Various language extensions * C-callback function types: 'crust fn ...' * Infinite-loop construct: 'loop { ... }' * Shorten 'mutable' to 'mut' * Required mutable-local qualifier: 'let mut ...' * Basic glob-exporting: 'export foo::*;' * Alt now exhaustive, 'alt check' for runtime-checked * Block-function form of 'for' loop, with 'break' and 'ret'. * New library code * AST quasi-quote syntax extension * Revived libuv interface * New modules: core::{future, iter}, std::arena * Merged per-platform std::{os*, fs*} to core::{libc, os} * Extensive cleanup, regularization in libstd, libcore Version 0.1 (2012-01-20) =============================== * Most language features work, including: * Unique pointers, unique closures, move semantics * Interface-constrained generics * Static interface dispatch * Stack growth * Multithread task scheduling * Typestate predicates * Failure unwinding, destructors * Pattern matching and destructuring assignment * Lightweight block-lambda syntax * Preliminary macro-by-example * Compiler works with the following configurations: * Linux: x86 and x86_64 hosts and targets * MacOS: x86 and x86_64 hosts and targets * Windows: x86 hosts and targets * Cross compilation / multi-target configuration supported. * Preliminary API-documentation and package-management tools included. Known issues: * Documentation is incomplete. * Performance is below intended target. * Standard library APIs are subject to extensive change, reorganization. * Language-level versioning is not yet operational - future code will break unexpectedly.