Updated releases notes for 1.19 #42503
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| Version 1.19.0 (2017-07-20) | ||
| =========================== | ||
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| Language | ||
| -------- | ||
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| - [Numeric fields can now be used for creating tuple structs.][36868] | ||
| For example `struct Point(u32, u32); let x = Point { 0: 7, 1: 0 };`. | ||
| - [Macro recursion limit increased to 1024 from 64.][41676] | ||
| - [Added lint for detecting unused macros.][41907] | ||
| - [`loop` can now return a value with `break`.][42016] | ||
| For example: `let x = loop { break 7; };` | ||
| - [C compatible `union`s are now available.][42068] They can only contain `Copy` | ||
| types and cannot have a `Drop` implementation. | ||
| Example: `union Foo { bar: u8 }` | ||
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There was a problem hiding this comment. A union with two fields of different types might be a clearer example. |
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| Compiler | ||
| -------- | ||
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| - [Added bootstrap support for Android.][41370] | ||
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There was a problem hiding this comment. I suggest expanding this to "Add support for bootstrapping the Rust compiler toolchain on Android." |
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| - [Change `arm-linux-androideabi` to correspond to the `armeabi` | ||
| official ABI.][41656] | ||
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There was a problem hiding this comment. It might be useful to note that developers must now use |
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| - [Fixed ICE when removing a source file between compilation sessions.][41873] | ||
| - [Minor optimisation of string operations.][42037] | ||
| - [Compiler error message is now `aborting due to previous error(s)` instead of | ||
| `aborting due to N previous errors`][42150] This was previously inaccurate and | ||
| would only count certain kinds of errors. | ||
| - [Now supports Visual Studio 2017][42225] | ||
| - [Added a lot][42264] of [new error codes][42302] | ||
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| Libraries | ||
| --------- | ||
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| - [`String` now implements `FromIterator<Cow<'a, str>>` and | ||
| `Extend<Cow<'a, str>>`][41449] | ||
| - [`Vec` now implements `From<&mut [T]>`][41530] | ||
| - [`SplitWhitespace` now implements `Clone`][41659] | ||
| - [`[u8]::reverse` is now 5x faster and `[u16]::reverse` is now | ||
| 1.5x faster][41764] | ||
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| Compatibility Notes | ||
| ------------------- | ||
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| - [`MutexGuard<T>` may only be `Sync` if `T` is `Sync`.][41624] | ||
| - [`-Z` flags are now no longer allowed to be used on the stable | ||
| compiler.][41751] This has been a warning for a year previous to this. | ||
| - [Ending a float literal with `._` is now a hard error. | ||
| Example: `42._` .][41946] | ||
| - [Ending a str literal with an underscore is now a hard error | ||
| Example: `"foo"_`][41990] | ||
|
There was a problem hiding this comment. This is also a warning, not error. |
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| - [Publicly exposing a private type is now a hard error][34537] This was | ||
| previously a warning. | ||
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There was a problem hiding this comment. Nah, this is wrong. Most of #34537 isn't going to be an error, only some tiny piece of it (public reexports of private enum variants) has become an error. |
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| - [Type parameter defaults in trait impls and functions is now a | ||
| hard error][36887] This was previously a warning. | ||
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There was a problem hiding this comment. This is still a warning, there was too much breakage (as you can see, the issue is still open). |
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| - [`use` imports on a private `extern crate` in a module is now a hard | ||
| error.][36886] This was previously a warning. | ||
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There was a problem hiding this comment. #36886 is about any use of private extern crates outside of their module, not about imports or reexports. |
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| - [`use ::self::foo;` is now a hard error.][36888] `self` paths are always | ||
| relative while the `::` prefix makes a path absolute, but was ignored and the | ||
| path was relative regardless. | ||
| - [Floating point constants in match patterns is now a hard error][36890] | ||
| This was previously a warning. | ||
| - [Struct or enum constants that don't derive `PartialEq` & `Eq` used | ||
| match patterns is now a hard error][36891] This was previously a warning. | ||
| - [Lifetimes named `'_` are no longer allowed.][36892] This was previously | ||
| a warning. | ||
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| Misc | ||
| ---- | ||
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| - [Added `rust-windbg.cmd`][39983] for loading rust `.natvis` files in the | ||
| Windows Debugger. | ||
| - [Rust Language Server is now packaged as a non default component with the | ||
| `.exe`, `.msi`, and `.pkg` installers][42306] | ||
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There was a problem hiding this comment. I think this has been reverted: #42472 |
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| Cargo | ||
| ----- | ||
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| - [Build scripts can now add environment variables the environment | ||
| the crate is being compiled in. | ||
| Example: `println!("cargo:rustc-env=FOO=bar");`][cargo/3929] | ||
| - [Subcommands now replace the current process rather than spawning a new | ||
| child process][cargo/3970] | ||
| - [Workspace members can now accept glob file patterns][cargo/3979] | ||
| - [Added `--all` flag to the `cargo bench` subcommand to run benchmarks of all | ||
| the members in a given workspace.][cargo/3988] | ||
| - [Updated `libssh2-sys` to 0.2.6][cargo/4008] | ||
| - [Target directory path is now in the cargo metadata][cargo/4022] | ||
| - [Cargo no longer checks the crates.io index locally][cargo/4026] This should | ||
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There was a problem hiding this comment. I would word this something like "Cargo no longer checks out a local working directory for the crates.io index" |
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| provide smaller file size for the registry, and improve cloning times, | ||
| especially on Windows machines. | ||
| - [Added an `--exclude` option for excluding certain packages when using the | ||
| `--all` option][cargo/4031] | ||
| - [Cargo will now automatically retry when receiving a 5xx error | ||
| from crates.io][cargo/4032] | ||
| - [The `--features` option now accepts multiple comma or space | ||
| delimited values.][cargo/4084] | ||
| - [Added a GNU make jobserver implementation to Cargo.][cargo/4110] | ||
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| [39983]: https://github.com/rust-lang/rust/pull/39983 | ||
| [36868]: https://github.com/rust-lang/rust/pull/36868 | ||
| [41370]: https://github.com/rust-lang/rust/pull/41370 | ||
| [41449]: https://github.com/rust-lang/rust/pull/41449 | ||
| [41530]: https://github.com/rust-lang/rust/pull/41530 | ||
| [41624]: https://github.com/rust-lang/rust/pull/41624 | ||
| [41656]: https://github.com/rust-lang/rust/pull/41656 | ||
| [41659]: https://github.com/rust-lang/rust/pull/41659 | ||
| [41676]: https://github.com/rust-lang/rust/pull/41676 | ||
| [41751]: https://github.com/rust-lang/rust/pull/41751 | ||
| [41764]: https://github.com/rust-lang/rust/pull/41764 | ||
| [41873]: https://github.com/rust-lang/rust/pull/41873 | ||
| [41907]: https://github.com/rust-lang/rust/pull/41907 | ||
| [41946]: https://github.com/rust-lang/rust/pull/41946 | ||
| [41990]: https://github.com/rust-lang/rust/pull/41990 | ||
| [42016]: https://github.com/rust-lang/rust/pull/42016 | ||
| [42037]: https://github.com/rust-lang/rust/pull/42037 | ||
| [42068]: https://github.com/rust-lang/rust/pull/42068 | ||
| [34537]: https://github.com/rust-lang/rust/issues/34537 | ||
| [36887]: https://github.com/rust-lang/rust/issues/36887 | ||
| [36886]: https://github.com/rust-lang/rust/issues/36886 | ||
| [36888]: https://github.com/rust-lang/rust/issues/36888 | ||
| [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 | ||
| [42150]: https://github.com/rust-lang/rust/pull/42150 | ||
| [42225]: https://github.com/rust-lang/rust/pull/42225 | ||
| [42306]: https://github.com/rust-lang/rust/pull/42306 | ||
| [42264]: https://github.com/rust-lang/rust/pull/42264 | ||
| [42302]: https://github.com/rust-lang/rust/pull/42302 | ||
| [cargo/3929]: https://github.com/rust-lang/cargo/pull/3929 | ||
| [cargo/3970]: https://github.com/rust-lang/cargo/pull/3970 | ||
| [cargo/3979]: https://github.com/rust-lang/cargo/pull/3979 | ||
| [cargo/3988]: https://github.com/rust-lang/cargo/pull/3988 | ||
| [cargo/4008]: https://github.com/rust-lang/cargo/pull/4008 | ||
| [cargo/4022]: https://github.com/rust-lang/cargo/pull/4022 | ||
| [cargo/4026]: https://github.com/rust-lang/cargo/pull/4026 | ||
| [cargo/4031]: https://github.com/rust-lang/cargo/pull/4031 | ||
| [cargo/4032]: https://github.com/rust-lang/cargo/pull/4032 | ||
| [cargo/4084]: https://github.com/rust-lang/cargo/pull/4084 | ||
| [cargo/4110]: https://github.com/rust-lang/cargo/pull/4110 | ||
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| Version 1.18.0 (2017-06-08) | ||
| =========================== | ||
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The correct PR is #41145