Hello and welcome to another issue of This Week in Rust! Rust is a systems language pursuing the trifecta: safety, concurrency, and speed. This is a weekly summary of its progress and community. Want something mentioned? Send me an email! Want to get involved? We love contributions.

This Week in Rust is openly developed on GitHub. If you find any errors or omissions in this week's issue, please submit a PR.

What's cooking on master?

115 pull requests were merged in the last week, and 2 RFC PRs.

Now you can follow breaking changes as they happen!

Breaking Changes

Other Changes

Implement associated constants
Expand the area of std::fs
Make UnsafeCell, RefCell, Mutex, and RwLock accept DSTs
Experimental MUSL target support
Implement Vec::drain from RFC 574
Add single-threaded fence intrinsics
Provide a Default implementation for AtomicPtr
std: Fix inheriting standard handles on windows
Add intrinsics for unchecked division and modulo
robinst, bguiz and michaelsproul landed more extended error diagnostics: 1, 2, 3.
derive: Give access to field attributes in ext::deriving
Implement String::drain(range) according to RFC 574

New Contributors

Brendan Graetz
Carol (Nichols || Goulding)
critiqjo
Dominic van Berkel
Hech
Jan Bujak
J Bailey
jooert
Jordan Humphreys
Poga Po
sinkuu
Xuefeng Wu

Approved RFCs

RFC 1040: Duration

New RFCs

Betawatch!

The current beta is rustc 1.0.0-beta.4 (850151a75 2015-04-30).

There were 2 PRs this week landing backports to beta.

25004
24943

Notable Links

Where Rust really shines
Using the Option type effectively
A Rust contributor tries their hand at Go
On reference counting and leaks and a few more remarks.
Rust web lessons based on nickel.rs and Angular.js. A tutorial on using nickel.
Helping Travis catch the rustc train and Travis on the train, part 2.
rustfmt - help wanted
I got Rust working on a $13 ARM micro controller board. Here are my notes from the process
Evaluation of performance and productivity metrics of potential programming languages in the HPC environment. MrFloya's bachelor's thesis.
A journey into iterators
Abomonation: terrifying serialization
Weekly meeting 2015-04-28. Snapshots, transmute, static_assert.
Core team meeting 2015-04-29. Optimizing by default, mem::forget, Debug builders, security policy.

Project Updates

Piston - skeletal animations with dual-quaternions. Video.
hprof. A simple hierarchical profiler.
Baby steps at procedural tile generation in kvarkus's Claymore.
Google APIs for Rust - Dev Diary #2: Making CLIs (video)
extra_lints. More lints!
RustyAndroid. Sample Rust Android application.
Servo continues pushing forward
Racer on Rust beta!
bounded-spsc-queue.
Horrorshow. An HTML templating macro.
rust-chunked-transfer. Encoder and decoder for HTTP chunked transfer.
kademlia-rs. A Rust implementation of the Kademlia DHT.

Upcoming Events

May 5. San Diego
May 11. Seattle
May 15. Amsterdam
May 15. Berlin
May 15. Boston
May 15. Columbus Rust Society
May 15. Copenhagen
May 15. Florence (@develer)
May 15. Florence (@Unifi)
May 15. London
May 15. Los Angeles
May 15. Madrid
May 15. Moscow
May 15. Munich
May 15. NYC
May 15. Paris
May 15. Pittsburgh
May 15. Portland
May 15. San Francisco
May 15. Toronto
May 15. Washington, DC
May 15. Warsaw
May 16. Chengdu
May 16. Seoul
May 16. Tokyo
May 19. Sydney
May 22. Lambdaconf. Boulder, CO. Jared Roesch - "Who got types in my systems programming?"
May 23. Bangalore

If you are running a Rust event please add it to the calendar to get it mentioned here. Email Erick Tryzelaar or Brian Anderson for access.

Quote of the Week

"Ultimately, I think this all boils down to the fact that borrowck only cares about reachable values. A leaked value isn't reachable, therefore it doesn't matter that it had a lifetime associated with it and technically outlives that lifetime, since it's not reachable no undefined behavior can be invoked."

Insight from kballard on the safety of linking.

Thanks to Gankro for the tip. Submit your quotes for next week!.

Like what you see? Subscribe!