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Title: This Week in Rust 25
Date: 2013-11-30 15:56
Category: This Week in Rust
Welcome to another issue of *This Week in Rust*, a weekly newsletter
summarizing Rust's progress and community activity. As always, if you have
something you'd like to be featured, just [send me an
email](mailto:corey@octayn.net?subject=This%20Week%20in%20Rust%20Suggestion).
Last week was very slow, but this week more than makes up for it I think!
Static linking landed, and there's been some nice cleanup of error messages
and various APIs.
<!-- more -->
# What's cooking on master?
59 PRs were merged this week.
## Breaking Changes
- Names of methods creating iterators have [changed
drastically](https://github.com/mozilla/rust/pull/10622) to remove the
`_iter` suffix. This reflects that iterators are a primary focus of APIs.
The PR description has all of the changes summarized.
- We now have [static linking
support](https://github.com/mozilla/rust/pull/10528)! It does, however,
involve some changes with how the `link` attribute works. The error messages
should guide you to the fixes.
- In preparation for the placement new changes, the `Path` constructor has
been [renamed from `new` to
`init`](https://github.com/mozilla/rust/pull/10697),.
- Some overly-permissive borrow checking for `&mut &mut` [has been
fixed](https://github.com/mozilla/rust/pull/10519). This is fairly obscure,
most code shouldn't have hit it.
- The parser is [more strict](https://github.com/mozilla/rust/pull/10642)
about what it accepts as a doc comment. Now, only `///` and `/**` are
counted as introducing doc comments (previously, `////` and `/***` would
also introduce a doc comment).
- `std::{uint, int}::{min, max}` [have been
removed](https://github.com/mozilla/rust/pull/10719). They were identical to
the functions in `std::cmp`, so use those instead.
- `extra::json` [has been rid of @
boxes](https://github.com/mozilla/rust/pull/10727), and now uses idiomatic
constructor names.
- The `type_id` intrinsic [now uses a language item as its return
value](https://github.com/mozilla/rust/pull/10722).
- Some [cleanup](https://github.com/mozilla/rust/pull/10662) has been done to
`std::rt::thread`, which is an interface to native threads (rather than
tasks).
- `do` blocks are [no longer
allowed](https://github.com/mozilla/rust/pull/10581) in non-`proc` contexts.
This means that `do` can not be used with a function whose last argument is
not a `proc`. A fairly large [thread on the mailing
list](https://mail.mozilla.org/pipermail/rust-dev/2013-November/006999.html)
is ongoing about this change.
- `LittleLock` now [uses RAII](https://github.com/mozilla/rust/pull/10660).
- C-like enums are [now represented as an
integer](https://github.com/mozilla/rust/pull/10652) rather than a struct,
at the LLVM level. This affects ABI.
- Linked failure [has been
removed](https://github.com/mozilla/rust/pull/10603) from the runtime.
- `extra::term` [no longer uses `@mut
Writer`](https://github.com/mozilla/rust/pull/10637), instead taking the
writer to use by value.
## Other changes
- `RefCell<T>`, previously known as `Mut<T>`, [has finally
landed](https://github.com/mozilla/rust/pull/10514), for all your dynamic
borrow checking needs.
- A lint for unknown attributes [has finally been
added](https://github.com/mozilla/rust/pull/10316). The compiler will now
warn when it sees an attribute it doesn't recognize.
- A lock-free [Chase-Lev
deque](http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.170.1097&rep=rep1&type=pdf)
has [been added to the runtime](https://github.com/mozilla/rust/pull/10678).
- The shootout-spectralnorm benchmark [has been
resurrected](https://github.com/mozilla/rust/pull/10704).
- Unknown feature gates [are now
linted](https://github.com/mozilla/rust/pull/10680), rather than being a
hard failure.
- The AST is [now frozen](https://github.com/mozilla/rust/pull/10693)!
- `GenericPort` [now has an
iterator](https://github.com/mozilla/rust/pull/10688) over the messages it
receives.
- `NodeId`, `CrateNum`, `Name`, and `Mrk` (types in libsyntax) [have been
shrunk to 32 bits](https://github.com/mozilla/rust/pull/10670).
- The restriction on macros expanding to a single item [has been
lifted](https://github.com/mozilla/rust/pull/10649). This obviates the need
for macros hackily expanding to a module containing the desired items. Do
note that this only works when the macro is in "item position", or where an
item is expected. There is an
[issue](https://github.com/mozilla/rust/issues/10681) open for lifting this
restriction.
- A `thread_local` attribute [has been
added](https://github.com/mozilla/rust/pull/10312), which exposes a
platform's native TLS, a la C11/C++11 `thread_local`.
- Cross compilation to win64 (via mingw-w64) [is now
supported](https://github.com/mozilla/rust/pull/10578). There were also a
[bunch of fixes](https://github.com/mozilla/rust/pull/10631) on real win64.
- The parser gives a [better error
message](https://github.com/mozilla/rust/pull/10641) when it encounters an
unclosed delimiter it didn't expect.
- There is a [better error
message](https://github.com/mozilla/rust/pull/10475) when a module name is
used as a type (the motivating example being `impl SomeTrait for some_module`).
- JSON decoding [now gives better
errors](https://github.com/mozilla/rust/pull/10625).
- Linker optimizations are [now
used](https://github.com/mozilla/rust/pull/10620) on Linux.
## New contributors
Our first-time contributors this week are:
- Andreas Ots
- Eric Biggers
- Jannis Harder
- Kiet Tran
# Weekly Meeting
The [weekly
meeting](https://github.com/mozilla/rust/wiki/Meeting-weekly-2013-11-26)
discussed bootstrap times, the `thread_local` PR, mutexes, and the GC. In
particular, it was decided that we should have nightlies.
# This Week in Servo
Servo is a web browser engine written in Rust and is one of the primary test
cases for the Rust language.
This was a short week due to the US Thanksgiving holiday, but there were still
17 landed PRs this week.
## Notable additions
- Hyunjune Kim and Sammy Kim landed some border style extensions in
[#1276](http://github.com/mozilla/servo/pull/1322).
- Youngmin Yoo, Seonghyun Kim, and Jaemin Moon landed overflow:hidden in
[#1298](http://github.com/mozilla/servo/pull/1298).
- Isabelle Carter landed changing the unrendered portion of content to use the
doc's background color in [#1210](http://github.com/mozilla/servo/pull/1210).
- Patrick Walton has been experimenting with some very promising parallel
layout work, which he described in a
[message](https://groups.google.com/forum/#!topic/mozilla.dev.servo/1nKmBvFewIs)
to the mailing list.
## Meetings
This week's [meeting](https://github.com/mozilla/servo/wiki/Meeting-2013-11-25)
covered the poor situation with Nvidia support on Linux, fleshed out the string
interning plan during CSS selector parsing/matching, and went into some Servo
and Rust-related build issues.
# Announcements etc
Do note that all the links are pulled directly from the
[subreddit](https://reddit.com/r/rust).
- [Matrix Multiply Performance in Rust](http://www.reddit.com/r/rust/comments/1rf8rz/matrix_multiply_performance_in_rust/)
- [nrays](https://github.com/sebcrozet/nrays) - a 3d/4d raytracer
- [SprocketNES: Practical Systems Programming in
Rust](https://air.mozilla.org/sprocketnes-practical-systems-programming-in-rust/).
Contrary to the title, this is actually a recording of the presentations at
the Bay Area meetup.
- [uutils](https://github.com/uutils/coreutils) - an attempt at writing
universal (as in cross-platform) CLI utils in Rust
- [lbac](https://github.com/cmr/lets-build-a-compiler) - a Rust port of Jack
Crenshaw's "Let's Build a Compiler"
|
