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+Title: This Week in Rust 66
+Date: 2015-01-19
+Category: This Week in Rust
+
+Hello and welcome to another issue of *This Week in Rust*!
+[Rust](http://rust-lang.org) is a systems language pursuing the trifecta:
+safe, concurrent, and fast. This is a weekly summary of its progress and
+community. Want something mentioned? [Send me an
+email!](mailto:corey@octayn.net?subject=This%20Week%20in%20Rust%20Suggestion)
+Want to get involved? [We love
+contributions](https://github.com/mozilla/rust/wiki/Note-guide-for-new-contributors).
+
+This Week in Rust is openly developed [on Github](https://github.com/cmr/this-week-in-rust).
+If you find any errors or omissions in this week's issue, [please submit a PR](https://github.com/cmr/this-week-in-rust/pulls).
+
+# What's cooking on master?
+
+119 pull requests were [merged in the last week][merged], and 1 [RFC][rfcs].
+
+[code]: https://github.com/rust-lang/rust/pulls?q=is%3Apr+is%3Amerged+merged%3A2015-01-12..2015-01-18
+[rfcs]: https://github.com/rust-lang/rfcs/pulls?q=is%3Apr+is%3Amerged+merged%3A2015-01-12..2015-01-18
+
+Now you can follow breaking changes *[as they happen][BitRust]*!
+
+[BitRust]: http://bitrust.octarineparrot.com/
+
+## Breaking Changes
+
+* `AtomicInt` and `AtomicUint` have been [renamed][atomic] to
+  `AtomicIsize` and `AtomicUsize` to match their corresponding integer
+  types.
+* To fix a bug in coherence [builtin traits can only be implemented
+  for structs and enums][cohere].
+
+[atomic]: https://github.com/rust-lang/rust/pull/20896
+[cohere]: https://github.com/rust-lang/rust/pull/21167
+
+## Other Changes
+
+* Certain long error messages of the form 'expected foo found bar' are
+  now [split neatly across multiple lines][multiline]. Examples in the
+  PR.
+* UFCS method calls can now be [qualified by the trait][ufcs] of the
+  method.  This can be used to disambiguate method calls when multiple
+  applicable methods are in scope, e.g. `<i32 as Add<_>>::add(1, 2)`
+  which is equivalent to `1.add(2)`. [RFC][rfcs-rfc].
+* Negative impls are [partially implemented][negimpl], though appear
+  to still be special-cased to the `Send` and `Sync`
+  traits. [RFC][negimpl-rfc].
+* Mutexes on Windows are faster now they are [implemented with Slim
+  Reader Writer Locks][mutex].
+* 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].
+* [Preliminary support for PowerPC][powerpc].
+* Fatal runtime errors are [now suitably boring][bore].
+
+[multiline]: https://github.com/rust-lang/rust/pull/19870
+[mutex]: https://github.com/rust-lang/rust/pull/20367
+[onun]: https://github.com/rust-lang/rust/pull/20889
+[negimpl]: https://github.com/rust-lang/rust/pull/20972
+[negimpl-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0019-opt-in-builtin-traits.md
+[powerpc]: https://github.com/rust-lang/rust/pull/20980
+[ufcs]: https://github.com/rust-lang/rust/pull/21077
+[ufcs-rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0132-ufcs.md
+[bore]: https://github.com/rust-lang/rust/pull/20944
+
+## New Contributors
+
+* Aidan Hobson Sayers
+* Alexander Korolkov
+* Andrew Barchuk
+* Cam Jackson
+* CarVac
+* Diggory Blake
+* Fenhl
+* Greg Chapple
+* Jeff Belgum
+* Lauri Lehmijoki
+* nathan dotz
+* Paul Crowley
+* Seth Faxon
+* Toni Cárdenas
+* Travis Watkins
+
+# Approved RFC's
+
+* [517: io and os reform (skeleton)][rfc-517]. Updating the `io` and
+  `os` modules is a large task and at the moment the RFC only lays out
+  the motivation. It will be updated incrementally in further pull
+  requests. [PR][rfc-517-pr]. Many follow-ups have been posted for
+  review: [string handling][rfc-517-string],
+  [`Reader`/`Writer`][rfc-517-readwrite], [deadlines][rfc-517-dead],
+  [`std::env`][rfc-517-env], [`std::process`][rfc-517-process].
+
+[rfc-517]: https://github.com/rust-lang/rfcs/blob/master/text/0517-io-os-reform.md
+[rfc-517-pr]: https://github.com/rust-lang/rfcs/pull/517
+[rfc-517-readwrite]: https://github.com/rust-lang/rfcs/pull/576
+[rfc-517-string]: https://github.com/rust-lang/rfcs/pull/575
+[rfc-517-dead]: https://github.com/rust-lang/rfcs/pull/577
+[rfc-517-env]: https://github.com/rust-lang/rfcs/pull/578
+[rfc-517-process]: https://github.com/rust-lang/rfcs/pull/579
+
+# New RFC's
+
+* [Use `isz`/`usz` as literal suffix for `isize`/`usize`][rfc-573-pr].
+* [Replace `Vec::drain` by a method that accepts a range parameter][rfc-574-pr].
+* [Rename (maybe one of) the standard collections for
+  consistency][rfc-580-pr]. Proposes several possible renamings.
+* [Add `foreach` to iterators][rfc-582-pr]. An internal iterator.
+* [Add `fmt` size hints][rfc-583-pr]. Allows buffers to be optimized.
+* [Remove `proc` keyword][rfc-584-pr]. Why isn't it gone already?
+* [Negative bounds][rfc-586-pr]. Gives flexibility to avoid coherence
+  conflicts.
+* [Make return types of `Fn` traits associated
+  types][rfc-587-pr]. More flexible because it doesn't require generic
+  return types to be constrained.
+* [Early trait bounds on generic types][rfc-590-pr]. Create a
+  convention to always apply trait bounds to wrapper types to improve
+  error messages when the bounds on the underlying types or methods
+  can't be satisfied.
+* [sizeof, alignof, offsetof, typeof][rfc-591-pr].
+* [CStr, the dereferenced complement to CString][rfc-592-pr].
+* [Forbid identifier `Self` for definitions][rfc-593-pr]. Fixing a
+  weird corner case that results from `Self` not being a keyword.
+* [Support incremental compilation][rfc-594-pr]. Rearchitect the
+  compiler.
+* [Output option handling][rfc-595-pr]. Make rustc's `-o`,
+  `--out-dir`, and `--emit` options more consistent.
+
+[rfc-573-pr]: https://github.com/rust-lang/rfcs/pull/573
+[rfc-574-pr]: https://github.com/rust-lang/rfcs/pull/574
+[rfc-580-pr]: https://github.com/rust-lang/rfcs/pull/580
+[rfc-582-pr]: https://github.com/rust-lang/rfcs/pull/582
+[rfc-583-pr]: https://github.com/rust-lang/rfcs/pull/583
+[rfc-584-pr]: https://github.com/rust-lang/rfcs/pull/584
+[rfc-586-pr]: https://github.com/rust-lang/rfcs/pull/586
+[rfc-587-pr]: https://github.com/rust-lang/rfcs/pull/587
+[rfc-590-pr]: https://github.com/rust-lang/rfcs/pull/590
+[rfc-591-pr]: https://github.com/rust-lang/rfcs/pull/591
+[rfc-592-pr]: https://github.com/rust-lang/rfcs/pull/592
+[rfc-593-pr]: https://github.com/rust-lang/rfcs/pull/593
+[rfc-594-pr]: https://github.com/rust-lang/rfcs/pull/594
+[rfc-595-pr]: https://github.com/rust-lang/rfcs/pull/595
+
+# Community
+
+The [periodic table of Rust types][period] has been updated, and
+/r/rust finally hit [8 trillion subscribers][trill].
+
+[period]: http://cosmic.mearie.org/2014/01/periodic-table-of-rust-types/
+[trill]: https://www.reddit.com/r/rust/comments/2sn91h/8_trillion_subscribers_we_did_it_reddit/
+
+## From the Team
+
+* [Weekly-meetings/2015-01-13][mtg]. fott; homu; integer overflow;
+  I/O; 1.0; comment RFC
+
+[mtg]: https://github.com/rust-lang/meeting-minutes/blob/master/weekly-meetings/2015-01-13.md
+
+## Blog Posts
+
+* [Thoughts about Rust from a D programmer][d]. Good
+  comparison. [/r/rust][d-r-rust]. [/r/programming][d-r-programming].
+* [Recent syntactic changes][syntax]. Nick discusses some of the
+  last-minute syntax changes he's recently landed.
+* [Little Orphan Impls][orphan]. Niko discusses options for coherence
+  rules. [/r/rust][orphan-r-rust].
+* [Unboxed Closures and FFI Callbacks][ffi]. How to use closures as
+  foreign callbacks.
+* [A Quick Comparison of Nim
+  vs. Rust][nim]. [/r/rust][nim-r-rust]. [/r/programming][nim-r-programming].
+* [Mooney GB: A Gameboy emulator written in Rust][mooneye].
+* [Building a HashMap in Rust - Part 1: What's a
+  Hashmap?][hashmap]. Gankro on the Rust
+  HashMap. [/r/rust][hashmap-r-rust].
+* [Worklog 2015-01-17: Rustdoc testing][rustdoc]. Yurume on his new
+  patch to test rustdoc output.
+* [Solving Project Eueler with Rust][euler]. A walk through of the
+  first problem.
+* [Getting started contributing to Rust][started]. kmc's slides from
+  the Saturday event in SF.
+* [Explore ownership in Rust][pwned]. Good entry level discussion of
+  ownership. [/r/rust][pwned-r-rust].
+* [DTrace on Rust][dtrace].
+* [SystemTap on Rust][systemtap]. Not to be outdone.
+* [Summary of Korean Rust Meetup #4][korea]. The Korean Rust
+  contingent is always up to interesting stuff.
+
+[d]: http://blog.dicebot.lv/2015/01/thoughts-about-rust-from-d-programmer.html
+[d-r-rust]: https://www.reddit.com/r/rust/comments/2s7bnt/thoughts_about_rust_from_d_programmer/
+[d-r-programming]: https://www.reddit.com/r/programming/comments/2s70mm/thoughts_about_rust_from_a_d_programmer/
+[nim-hn]: http://news.ycombinator.com/item?id=8883791
+[nim-r-rust]: https://www.reddit.com/r/rust/comments/2sd5rv/a_quick_comparison_of_nim_vs_rust/
+[nim-r-programming]: https://www.reddit.com/r/programming/comments/2scodb/a_quick_comparison_of_nim_vs_rust/
+[syntax]: http://featherweightmusings.blogspot.co.nz/2015/01/recent-syntactic-changes-to-rust.html
+[euler]: http://unlogic.co.uk/2015/01/12/solving-project-euler-with-rust-1/
+[dtrace]: https://twitter.com/bcantrill/status/555143487482368000
+[mooneye]: http://gekkio.fi/blog/2015-01-13-mooneye-gb-a-gameboy-emulator-written-in-rust.html
+[systemtap]: https://gist.github.com/cuviper/08239cbae023411a29d9
+[orphan]: http://smallcultfollowing.com/babysteps/blog/2015/01/14/little-orphan-impls/
+[orphan-r-rust]: https://www.reddit.com/r/rust/comments/2sfm4a/little_orphan_impls_nikos_blog/
+[hashmap]: http://cglab.ca/~abeinges/blah/robinhood-part-1/
+[hashmap-r-rust]: https://www.reddit.com/r/rust/comments/2sjayc/building_a_hashmap_in_rust_part_1_whats_a_hashmap/
+[ffi]: http://aatch.github.io/blog/2015/01/17/unboxed-closures-and-ffi-callbacks/
+[rustdoc]: https://lifthrasiir.github.io/rustlog/worklog-2015-01-17.html
+[started]: http://kmcallister.github.io/talks/rust/2015-contributing-to-rust/slides.html
+[pwned]: http://nercury.github.io/rust/guide/2015/01/19/ownership.html
+[pwned-r-rust]: https://www.reddit.com/r/rust/comments/2sv4uv/explore_ownership_system_in_rust/
+[korea]: https://gist.github.com/lifthrasiir/93ba9f6aec7bd2113941
+
+## Videos
+
+* [Servo: Building a Parallel Web Browser][servo]. Jack Moffit at
+  linux.conf.au. [HN][servo-hn]. [/r/programming][servo-r-programming].
+
+[servo]: https://youtu.be/7q9vIMXSTzc
+[servo-hn]: https://news.ycombinator.com/item?id=8899812
+[servo-r-programming]: https://www.reddit.com/r/programming/comments/2lcap0/an_introduction_to_servo/
+
+## Discussions
+
+* [Small string optimization, remove as_mut_vec][small]. The current
+  definition of `Vec` doesn't allow the common 'small string'
+  optimization. [/r/rust][small-r-rust].
+* [Does Rust let you develop faster than C++?][fast]. TL;DR ¯\_(ツ)_/¯
+* [Using Rust 1.0 for video game development][games]. Yes, please.
+* [Rust support in Visual Studio][vs]. Doesn't exist yet, sorry.
+* [Rust Berlin community efforts][berlin]. Berlin needs you!
+* [By value operator overloading problems][over]. Implementing math
+  operators for non-copyable types means you have to pass them by
+  reference, like `&a + &b`, which some consider unsightly.
+
+[games]: https://www.reddit.com/r/rust/comments/2s4kp9/using_rust_10_for_video_game_development/
+[vs]: https://www.reddit.com/r/rust/comments/2s5d65/rust_support_in_visual_studio/
+[fast]: https://www.reddit.com/r/rust/comments/2sa2qx/does_rust_let_you_develop_faster_than_c/
+[berlin]: https://www.reddit.com/r/rust/comments/2sbkuo/rustberlin_community_efforts/
+[small]: http://discuss.rust-lang.org/t/small-string-optimization-remove-as-mut-vec/1320
+[small-r-rust]: https://www.reddit.com/r/rust/comments/2slcs8/small_string_optimization_remove_as_mut_vec/
+[over]: https://www.reddit.com/r/rust/comments/2srz0g/by_value_operator_overloading_problems/
+
+## New Projects
+
+* [launch-code]. Cryptographic auditing of unsafe code. [/r/rust][launch-code-r-rust].
+* [rust-cipher]. Encryption with XSalsa20 and BLAKE2B-512 in the
+  Encrypt-then-MAC mode.
+* [rust-haskell-ffi]. Example of calling Rust from Haskell.
+* [dynamodule]. Experiments with dynamic OOP.
+* [rdb-rs]. A Redis RDB parser.
+* [carboxyl]. Functional reactive programming.
+* [Sparkle]. An entity component system. [/r/rust][Sparkle-r-rust].
+* [rust-erl-ext]. Erlang 'external term' parser.
+* [rs-intrusive]. A system for creating intrusive data structures,
+  Rust's kryptonite.
+* [handlebars-iron]. Template middleware for the Iron web framework.
+
+[launch-code]: https://github.com/kmcallister/launch-code
+[launch-code-r-rust]: https://www.reddit.com/r/rust/comments/2sc7oq/cryptographic_signatures_for_auditing_unsafe_code/
+[rust-cipher]: https://github.com/zenith-nz/rust-cipher
+[rust-haskell-ffi]: https://github.com/aisamanra/rust-haskell-ffi
+[dynamodule]: https://github.com/kmcallister/dynamodule
+[rdb-rs]: http://fnordig.de/2015/01/15/rdb-rs-fast-and-efficient-rdb-parsing-utility/
+[carboxyl]: https://github.com/aepsil0n/carboxyl
+[Sparkle]: https://github.com/RustSparkle/Sparkle
+[Sparkle-r-rust]: https://www.reddit.com/r/rust/comments/2srrx0/another_entity_component_system/
+[rust-erl-ext]: https://github.com/seriyps/rust-erl-ext
+[rs-intrusive]: https://github.com/aidancully/rs-intrusive
+[handlebars-iron]: https://github.com/sunng87/handlebars-iron
+
+## Project Updates
+
+* [This Week in Servo 19][twis].
+* [Worklog 2015-01-13: Time zones, chrono, and associated
+  types]. Yurume discusses updates to rust-chrono.
+
+[twis]: http://blog.servo.org/2015/01/13/twis-19/
+[chrono]: https://lifthrasiir.github.io/rustlog/worklog-2015-01-13.html
+
+## Upcoming Events
+
+* [January 19 - Rust Paris](http://www.meetup.com/Rust-Paris)
+* [January 20 - Rust Berlin](http://www.meetup.com/Rust-Berlin/events/219070839/)
+* [January 20 - Fast, Safe, and
+  Beautiful](http://www.oreilly.com/pub/e/3291). Jim Blandy's webcast
+  on Rust for O'Reilly.
+* [January 28 - Rust Amsterdam](http://www.meetup.com/Rust-Amsterdam/events/218908906/)