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+Title: This Week in Rust 284
+Number: 284
+Date: 2019-04-30
+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: safety, concurrency, and speed.
+This is a weekly summary of its progress and community.
+Want something mentioned? Tweet us at [@ThisWeekInRust](https://twitter.com/ThisWeekInRust) or [send us a pull request](https://github.com/cmr/this-week-in-rust).
+Want to get involved? [We love contributions](https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md).
+
+*This Week in Rust* is openly developed [on GitHub](https://github.com/cmr/this-week-in-rust).
+If you find any errors in this week's issue, [please submit a PR](https://github.com/cmr/this-week-in-rust/pulls).
+
+# Updates from Rust Community
+
+## News & Blog Posts
+
+* 🎈🎉 [Announcing Rust 1.34.1](https://blog.rust-lang.org/2019/04/25/Rust-1.34.1.html). 🎉🎈
+* [Await syntax discussion summary](https://internals.rust-lang.org/t/await-syntax-discussion-summary/9914).
+* [A (type-based) Rust cheatsheet](https://upsuper.github.io/rust-cheatsheet/).
+* [Writing an OS in Rust: Testing](https://os.phil-opp.com/testing/).
+* [How Rust solved dependency hell](https://stephencoakley.com/2019/04/24/how-rust-solved-dependency-hell).
+* [Creating crossplatform Rust terminal apps](http://www.jonathanturner.org/2019/04/porting-the-pikachu.html).
+* [10 key learnings in Rust after 30,000 lines of code](https://medium.com/@jondot/my-key-learnings-after-30-000-loc-in-rust-a553e6403c19).
+* [UWP port is in progress](https://www.reddit.com/r/rust/comments/bhffwn/uwp_port_is_in_progress/).
+* [Mozilla IRC sunset and the Rust channel](https://blog.rust-lang.org/2019/04/26/Mozilla-IRC-Sunset-and-the-Rust-Channel.html).
+* [Giving up on wlroots-rs](http://way-cooler.org/blog/2019/04/29/rewriting-way-cooler-in-c.html).
+* [Making Sandspiel (a falling sand game in Rust and Wasm)](https://maxbittker.com/making-sandspiel).
+* [Implementing tile encoding in rav1e](https://blog.rom1v.com/2019/04/implementing-tile-encoding-in-rav1e/).
+
+# Crate of the Week
+
+This week's crate is [cast-rs](https://github.com/japaric/cast), a crate with ergonomic, checked cast functions for primitive types. Thanks to [mark-i-m](https://users.rust-lang.org/t/crate-of-the-week/2704/525) for the suggestion!
+
+[Submit your suggestions and votes for next week][submit_crate]!
+
+[submit_crate]: https://users.rust-lang.org/t/crate-of-the-week/2704
+
+# Call for Participation
+
+Always wanted to contribute to open-source projects but didn't know where to start?
+Every week we highlight some tasks from the Rust community for you to pick and get started!
+
+Some of these tasks may also have mentors available, visit the task page for more information.
+
+*No issues were proposed for CfP*.
+
+If you are a Rust project owner and are looking for contributors, please submit tasks [here][guidelines].
+
+[guidelines]: https://users.rust-lang.org/t/twir-call-for-participation/4821
+
+# Updates from Rust Core
+
+229 pull requests were [merged in the last week][merged]
+
+[merged]: https://github.com/search?q=is%3Apr+org%3Arust-lang+is%3Amerged+merged%3A2019-04-22..2019-04-29
+
+* [Stabilize futures_api](https://github.com/rust-lang/rust/pull/59739).
+* [Replace HashMap implementation with SwissTable (as an external crate)](https://github.com/rust-lang/rust/pull/58623)
+* [Introduce `hir::ExprKind::Use` and employ in for loop desugaring](https://github.com/rust-lang/rust/pull/60225)
+* [Future-proof MIR for dedicated debuginfo](https://github.com/rust-lang/rust/pull/56278)
+* [Add `f16c` target_feature](https://github.com/rust-lang/rust/pull/60191)
+* [Fix `sync_all` on macos/ios](https://github.com/rust-lang/rust/pull/60121)
+* [Implement `saturating_abs()` and `saturating_neg()` functions for signed integer types](https://github.com/rust-lang/rust/pull/60192)
+* [Stabilize `Iterator::copied`](https://github.com/rust-lang/rust/pull/60333)
+* [Stabilize `pointer::align_offset`](https://github.com/rust-lang/rust/pull/60303)
+* [Const-stabilize `std::mem::needs_drop`](https://github.com/rust-lang/rust/pull/60364)
+* [cargo: Support relative paths for registries](https://github.com/rust-lang/cargo/pull/6873)
+* [Set `cfg(test)` when rustdoc is running with `--test` option](https://github.com/rust-lang/rust/pull/59940)
+
+## Approved RFCs
+
+Changes to Rust follow the Rust [RFC (request for comments)
+process](https://github.com/rust-lang/rfcs#rust-rfcs). These
+are the RFCs that were approved for implementation this week:
+
+* [RFC 2645: Transparent Unions and Enums](https://github.com/rust-lang/rfcs/pull/2645).
+* [RFC 2565: Attributes in formal function parameter position](https://github.com/rust-lang/rfcs/pull/2565).
+
+## Final Comment Period
+
+Every week [the team](https://www.rust-lang.org/team.html) announces the
+'final comment period' for RFCs and key PRs which are reaching a
+decision. Express your opinions now.
+
+### [RFCs](https://github.com/rust-lang/rfcs/labels/final-comment-period)
+
+* [disposition: merge] [Allow arbitrary enums to have explicit discriminants](https://github.com/rust-lang/rfcs/pull/2363).
+* [disposition: merge] [Symbol Mangling v2](https://github.com/rust-lang/rfcs/pull/2603).
+* [disposition: merge] [Introduce "compiler-team contributors"](https://github.com/rust-lang/rfcs/pull/2689).
+* [disposition: postpone] [Changing the overflow behavior for usize in release builds to panic](https://github.com/rust-lang/rfcs/pull/2635).
+
+### [Tracking Issues & PRs](https://github.com/rust-lang/rust/labels/final-comment-period)
+
+* [disposition: merge] [[Stabilization] Future APIs](https://github.com/rust-lang/rust/issues/59725).
+* [disposition: merge] [Stabilize the core::array module and reexport in std (for TryFromSliceError)](https://github.com/rust-lang/rust/issues/60014).
+* [disposition: merge] [Tracking issue for DoubleEndedIterator::nth_back](https://github.com/rust-lang/rust/issues/56995).
+* [disposition: merge] [Experimentally add `ffi_const` and `ffi_pure` extern fn attributes](https://github.com/rust-lang/rust/pull/58327).
+* [disposition: merge] [Implement `iter::Sum` and `iter::Product` for `Option`](https://github.com/rust-lang/rust/pull/58975).
+* [disposition: merge] [std: Derive `Default` for `io::Cursor`](https://github.com/rust-lang/rust/pull/60234).
+
+## New RFCs
+
+* [Add Unicode Annex 31 methods to `char`](https://github.com/rust-lang/rfcs/pull/2693).
+
+# Upcoming Events
+
+### Africa
+
+* [May  2. Johannesburg, ZA - Johannesburg meetup - Everybody Borrows](https://www.meetup.com/Johannesburg-Rust-Meetup/events/gpxrtqyzhbcb/).
+
+### Asia Pacific
+
+* [May  6. Auckland, NZ - Rust AKL - Rust Debugging Techniques + Lightening Talks](https://www.meetup.com/rust-akl/events/259480601/).
+* [May  8. Kuala Lumpur, MY - Rust Meetup May 2019](https://docs.google.com/forms/d/e/1FAIpQLScUHpCLPMF8I1QxA_WnIz9bipalrNsUckSyLMysGGNB5y0Lyw/viewform).
+
+### Europe
+
+* [May  2. Munich, DE - Rust Munich - Rust libp2p](https://www.meetup.com/rust-munich/events/259984522/).
+* [May  2. Zagreb, HR - Rust Meetup 201905: WebAssembly <3 Rust](https://www.meetup.com/Zagreb-Rust-Meetup/events/260942646/).
+* [May  6. Budapest, HU - Rust Hungary Meetup](https://www.meetup.com/Rust-Hungary-Meetup/events/260651034/).
+* [May  9. Wrocław, PL - Rust Wroclaw Meetup #10](https://www.meetup.com/Rust-Wroclaw/events/260858425/).
+* [May  9. Berlin, DE - Rust+GNOME 2019 Hackfest#5](https://wiki.gnome.org/Hackfests/Rust2019).
+* [May 15. Berlin, DE - Berlin Rust Hack and Learn](https://www.meetup.com/opentechschool-berlin/events/gkkttqyzhbtb/).
+* [May 15. Helsinki, FI - Rust meetup May](https://www.meetup.com/Finland-Rust-Meetup/events/260939025/).
+
+### North America
+
+* [May  8. Mesa, US - Desert Rust: Rust Study Group (booze.rs)](https://www.meetup.com/Desert-Rustaceans/events/xbfdtqyzhblb/).
+* [May  9. San Diego, US - San Diego Rust May Meetup](https://www.meetup.com/San-Diego-Rust/events/260763786/).
+* [May  9. Arlington, US - Rust DC — Mid-month Rustful](https://www.meetup.com/RustDC/events/260559957).
+* [May  9. Columbus, US - Columbus Rust Society - Monthly Meeting](https://www.meetup.com/columbus-rs/events/dbcfrpyzhbmb/).
+* [May 14. Seattle, US - Monthly meetup](https://www.meetup.com/Seattle-Rust-Meetup/events/nzfspqyzhbsb/).
+* [May 15. Vancouver, CA - Vancouver Rust meetup](https://www.meetup.com/Vancouver-Rust/events/fzqqwqyzhbtb/).
+
+If you are running a Rust event please add it to the [calendar] to get
+it mentioned here. Please remember to add a link to the event too.
+Email the [Rust Community Team][community] for access.
+
+[calendar]: https://www.google.com/calendar/embed?src=apd9vmbc22egenmtu5l6c5jbfc%40group.calendar.google.com
+[community]: mailto:community-team@rust-lang.org
+
+# Rust Jobs
+
+* [Mozilla is hiring for the Rust Team](https://internals.rust-lang.org/t/mozilla-is-hiring-for-the-rust-team-2019/9949).
+* [Developer Advocate at Parity, Berlin, DE or remote](https://www.parity.io/jobs/#berlin-developer-advocate).
+
+*Tweet us at [@ThisWeekInRust](https://twitter.com/ThisWeekInRust) to get your job offers listed here!*
+
+# Quote of the Week
+
+> Clippy’s Favorite Activity Is Criticizing Clippy’s Codebase
+
+[ReductRs on twitter](https://mobile.twitter.com/reduct_rs/status/1121439213772333058)!
+
+Llogiq is pretty self-congratulatory for picking this awesome quote.
+
+[Please submit quotes and vote for next week!](https://users.rust-lang.org/t/twir-quote-of-the-week/328)
+
+*This Week in Rust is edited by: [nasa42](https://github.com/nasa42), [llogiq](https://github.com/llogiq), and [Flavsditz](https://github.com/Flavsditz).*
+
+<small>[Discuss on r/rust]().</small>