Mozilla and the Rust community are pleased to announce version 0.9 of the
Rust compiler and tools. Rust is a systems programming language with a
focus on safety, performance and concurrency.
This was another eventful release in which we made extensive improvements
to the runtime and I/O subsystem, introduced static linking and link-time
optimization, and reduced the variety of closures in the language. 0.9
also
begins a final series of planned changes to how pointers are treated in
Rust, starting with the deprecation of the built-in "managed pointer"
type
and its accompanying `@` sigil, and the introduction of smart pointer
types
to the standard library.
The brief release notes are included in this announcement, and there is
further explanation in the detailed release [notes] on the wiki.
Documentation and all the links in this email are available on the
[website]. As usual, version 0.9 should be considered an alpha release,
suitable for early adopters and language enthusiasts. Please file [bugs]
and join the [fun].
[website]: http://www.rust-lang.org
[notes]: https://github.com/mozilla/rust/wiki/Doc-detailed-release-notes
[bugs]: https://github.com/mozilla/rust/issues
[fun]:
https://github.com/mozilla/rust/wiki/Note-guide-for-new-contributors
This release is available as both a tarball and a Windows installer:
* http://static.rust-lang.org/dist/rust-0.9.tar.gz
http://static.rust-lang.org/dist/rust-0.9.tar.gz.asc
SHA256 (of .tar.gz):
c0911c3545b797a1ca16f3d76bf5ed234754b828efd1e22c182c7300ac7dd5d1
* http://static.rust-lang.org/dist/rust-0.9-install.exe
http://static.rust-lang.org/dist/rust-0.9-install.exe.asc
SHA256 (of .exe):
6ab14e25761d61ba724c5f77403d09d566d3187a2e048e006036b960d938fe90
Thanks to everyone who contributed!
Regards,
The Rust Team
Version 0.9 (January 2014)
--------------------------
* 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 preperation 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 introduc
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 embeded 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.
Contributors to Rust 0.9
------------------------
Adrien Tétar <[email protected]>
Alan Andrade <[email protected]>
Alexandros Tasos <[email protected]>
Alex Crichton <[email protected]>
a_m0d <[email protected]>
Andreas Neuhaus <[email protected]>
Andreas Ots <[email protected]>
Andrei Formiga <[email protected]>
Benjamin Herr <[email protected]>
Benjamin Peterson <[email protected]>
Birunthan Mohanathas <[email protected]>
blake2-ppc <blake2-ppc>
Branimir <[email protected]>
Brendan Zabarauskas <[email protected]>
Brian Anderson <[email protected]>
Brian <[email protected]>
Cadence Marseille <[email protected]>
Carl-Anton Ingmarsson <[email protected]>
Carol Willing <[email protected]>
Carter Tazio Schonwald <[email protected]>
chitra <chitra@chitra-HP-Pavilion-g6-Notebook-PC.(none)>
Chris Morgan <[email protected]>
Chris Sainty <[email protected]>
Corey Richardson <[email protected]>
Dan Connolly <[email protected]>
Daniel Micay <[email protected]>
Dan Luu <[email protected]>
Dave Hodder <[email protected]>
David Creswick <[email protected]>
David Renshaw <[email protected]>
Diego Ongaro <[email protected]>
Dirkjan Bussink <[email protected]>
Dmitry Ermolov <[email protected]>
Do Nhat Minh <[email protected]>
Eduard Burtescu <[email protected]>
Edward Z. Yang <[email protected]>
eliovir <[email protected]>
Eric Biggers <[email protected]>
Eric Holk <[email protected]>
Erick Tryzelaar <[email protected]>
Erik Lyon <[email protected]>
Erik Price <[email protected]>
Fabrice Desré <[email protected]>
Felix S. Klock II <[email protected]>
Flavio Percoco <[email protected]>
flo-l <[email protected]>
Florian Gilcher <[email protected]>
Florian Hahn <[email protected]>
Florian Zeitz <[email protected]>
g3xzh <[email protected]>
Gareth Smith <[email protected]>
Geoff Hill <[email protected]>
Geoffroy Couprie <[email protected]>
Georges Dubus <[email protected]>
gifnksm <[email protected]>
Guillaume Pinot <[email protected]>
Gyorgy Andrasek <[email protected]>
Harry Marr <[email protected]>
Heather <[email protected]>
Huon Wilson <[email protected]>
Ian Daniher <[email protected]>
Igor Bukanov <[email protected]>
Isaac Dupree <[email protected]>
Jack Moffitt <[email protected]>
Jaemin Moon <[email protected]>
Jan Niklas Hasse <[email protected]>
Jannis Harder <[email protected]>
Jason Orendorff <[email protected]>
Jason Toffaletti <[email protected]>
Jay Anderson <[email protected]>
Jed Davis <[email protected]>
Jeff Olson <[email protected]>
Joe Schafer <[email protected]>
John Louis Walker <[email protected]>
Jordi Boggiano <[email protected]>
Joshua Yanovski <[email protected]>
Julia Evans <[email protected]>
Jyun-Yan You <[email protected]>
Keegan McAllister <[email protected]>
Kevin Ballard <[email protected]>
Kiet Tran <[email protected]>
klutzy <[email protected]>
kud1ing <[email protected]>
Leah Hanson <[email protected]>
LEE Wondong <[email protected]>
Léo Testard <[email protected]>
Lindsey Kuper <[email protected]>
Luca Bruno <[email protected]>
Luis de Bethencourt <[email protected]>
Luqman Aden <[email protected]>
lyuts <[email protected]>
Mark Rowe <[email protected]>
Marvin Löbel <[email protected]>
Matt Carberry <[email protected]>
Matthew Auld <[email protected]>
Matthew Iselin <[email protected]>
Micah Chalmer <[email protected]>
Michael 'devbug' Williams <[email protected]>
Michael Letterle <[email protected]>
Michael Woerister <michaelwoerister@gmail>
niftynif <[email protected]>
Niko Matsakis <[email protected]>
Noufal Ibrahim <[email protected]>
Olivier Saut <[email protected]>
osa1 <[email protected]>
Palmer Cox <[email protected]>
Patrick Walton <[email protected]>
Peter Zotov <[email protected]>
Philipp Brüschweiler <[email protected]>
Raphael Speyer <[email protected]>
reedlepee <[email protected]>
Richard Diamond <[email protected]>
Robert Irelan <[email protected]>
Scott Lawrence <[email protected]>
Sébastien Chauvel <[email protected]>
Sébastien Crozet <[email protected]>
Sébastien Paolacci <[email protected]>
Seo Sanghyeon <[email protected]>
sh8281.kim <[email protected]>
SiegeLord <[email protected]>
sp3d <sp3d@github>
S Pradeep Kumar <[email protected]>
Steve Klabnik <[email protected]>
Steven Fackler <[email protected]>
Strahinja Val Markovic <[email protected]>
Tim Chevalier <[email protected]>
Tomas Sedovic <[email protected]>
Vadim Chugunov <[email protected]>
Vijay Korapaty <[email protected]>
Volker Mische <[email protected]>
Young-il Choi <[email protected]>
Zach Kamsler <[email protected]>
Zack Corr <[email protected]>
Ziad Hatahet <[email protected]>
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