draft 311

Author: nasa42

drafts/2019-11-05-this-week-in-rust.md

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+Title: This Week in Rust 311
+Number: 311
+Date: 2019-11-05
+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
+
+# Crate of the Week
+
+Sadly, there was no nomination for crate of the week.
+
+[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.
+
+* [good first issue] [async-std: use once_cell instead of lazy_static](https://github.com/async-rs/async-std/issues/406).
+* [good first issue] [async-std: Add Future::flatten](https://github.com/async-rs/async-std/issues/404).
+* [good first issue] [async-std: Add stream::from_iter](https://github.com/async-rs/async-std/issues/400).
+* [good first issue] [async-std: TCP smoke testing](https://github.com/async-rs/async-std/issues/407).
+
+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
+
+347 pull requests were [merged in the last week][merged]
+
+[merged]: https://github.com/search?q=is%3Apr+org%3Arust-lang+is%3Amerged+merged%3A2019-10-21..2019-10-28
+
+* [Don't ICE for completely unexpandable `impl Trait` types](https://github.com/rust-lang/rust/pull/65777)
+* [Eliminate `intersect_opt`](https://github.com/rust-lang/rust/pull/65648)
+* [Derive `Rustc{En,De}codable` for `TokenStream`](https://github.com/rust-lang/rust/pull/65641)
+* [Forbid non-`structural_match` types in const generics](https://github.com/rust-lang/rust/pull/65627)
+* [Turn crate store into a resolver output](https://github.com/rust-lang/rust/pull/65625)
+* [Simplify chalk-engine a bit](https://github.com/rust-lang/chalk/pull/264)
+* [Use heuristics to suggest assignment](https://github.com/rust-lang/rust/pull/65566)
+* [Point at associated type for some obligations](https://github.com/rust-lang/rust/pull/65288)
+* [Lockless `LintStore`](https://github.com/rust-lang/rust/pull/65193)
+* [Remove unnecessary trait bounds and derivations](https://github.com/rust-lang/rust/pull/65647)
+* [Change untagged_unions to not allow union fields with drop](https://github.com/rust-lang/rust/pull/62330)
+* [miri: Add `write_bytes` method to Memory doing bounds-checks and supporting iterators](https://github.com/rust-lang/rust/pull/65621)
+* [Object safe for dispatch](https://github.com/rust-lang/rust/pull/57545)
+* [Fix WASI sleep impl](https://github.com/rust-lang/rust/pull/65617)
+* [Stabilize `const_constructor`](https://github.com/rust-lang/rust/pull/65188)
+* [Stabilize `Option::flatten`](https://github.com/rust-lang/rust/pull/64747)
+* [Stabilize `#[non_exhaustive]`](https://github.com/rust-lang/rust/pull/64639) (RFC 2008)
+* [Make `is_power_of_two` a const function](https://github.com/rust-lang/rust/pull/65092)
+* [Add by-value iterator for arrays](https://github.com/rust-lang/rust/pull/62959)
+* [Add `Cow::`{`is_borrowed`, `is_owned`}`()`](https://github.com/rust-lang/rust/pull/65144)
+* [Add `[_]::`{`as_ptr_range`, `as_mut_ptr_range`}`()`](https://github.com/rust-lang/rust/pull/65806)
+* [Add {`String`, `Vec`}`::into_raw_parts()`](https://github.com/rust-lang/rust/pull/65705)
+* [Add the `matches!( $expr, $pat ) -> bool` macro](https://github.com/rust-lang/rust/pull/65479)
+* [Relax `ExactSizeIterator` bound on `write_bytes`](https://github.com/rust-lang/rust/pull/65704)
+* [rustdoc: Forward `-Z` options to rustc](https://github.com/rust-lang/rust/pull/65314)
+
+## 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:
+
+*No RFCs were approved this week.*
+
+## 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: postpone] [Signing registry index commits](https://github.com/rust-lang/rfcs/pull/2474).
+
+### [Tracking Issues & PRs](https://github.com/rust-lang/rust/labels/final-comment-period)
+
+* [disposition: merge] [Stabilize --extern flag without a path](https://github.com/rust-lang/rust/pull/64882).
+* [disposition: merge] [Stabilize cfg(doctest)](https://github.com/rust-lang/rust/pull/63803).
+* [disposition: merge] [Fix accidental stabilization in feature-detection macros](https://github.com/rust-lang/rust/pull/64534).
+* [disposition: merge] [Implement @argsfile to read arguments from command line](https://github.com/rust-lang/rust/issues/63576).
+* [disposition: merge] [Tracking issue for todo! macro](https://github.com/rust-lang/rust/issues/59277).
+* [disposition: merge] [Tracking issue for floats ↔ bytes conversions](https://github.com/rust-lang/rust/issues/60446).
+* [disposition: merge] [Under what conditions can you implement Copy for a union](https://github.com/rust-lang/rust/issues/65748)?
+
+## New RFCs
+
+* [Propose implicit named arguments for formatting macros](https://github.com/rust-lang/rfcs/pull/2795).
+* [Announcing the FFI-unwinding Project Group](https://github.com/rust-lang/rfcs/pull/2797).
+* [Environment variable sandboxing](https://github.com/rust-lang/rfcs/pull/2794).
+* [Add `[T]::as_ptr_range()`](https://github.com/rust-lang/rfcs/pull/2791).
+* [Subslice-offset - Get the offset of references into a slice](https://github.com/rust-lang/rfcs/pull/2796).
+
+# Upcoming Events
+
+### Africa
+
+* [Nov  6. Johannesburg, ZA - Johannesburg Rust Meetup - informal discussions on topics related to the language](https://www.meetup.com/Johannesburg-Rust-Meetup/events/dgqmbryzpbjb/).
+
+### Asia Pacific
+
+* [Nov  4. Auckland, NZ - Rust AKL - Introduction to Rust (part 2 of 3)](https://www.meetup.com/rust-akl/events/259481269/).
+* [Nov 13. TBD, MY - Rust Malaysia Meetup November 2019](https://docs.google.com/forms/d/e/1FAIpQLSfZM9XYmBXq9tjqRziR-O3vBmm4rt1Ltnc9bGcleVrLmZHrSg/viewform).
+
+### Europe
+
+* [Nov 2. Lviv, UA - Peer Lab Lviv #Rust: Introduction](https://t.me/peerlab_lviv_rust/135).
+* [Nov 2. Kharkiv, UA - Peer Lab Kharkiv #Rust: Command-Line Applications in Rust](https://www.facebook.com/events/689432161466405/).
+* **[Nov 9 & 10. Barcelona, ES - RustFest Barcelona 2019](https://barcelona.rustfest.eu/).**
+* [Nov 12. Hamburg, DE - Rust Hack & Learn November 2019](https://www.meetup.com/Rust-Meetup-Hamburg/events/265899865/).
+* [Nov 13. Wrocław, PL - Rust Wrocław Meetup #14](https://www.meetup.com/Rust-Wroclaw/events/265813648/).
+* [Nov 13. Berlin, DE - OpenTechSchool Berlin - Rust Hack and Learn](https://www.meetup.com/opentechschool-berlin/events/nxdpgryzpbrb/).
+* [Nov 14. Zurich, CH - Rust Zurich - RustFest Decompression Zürich](https://www.meetup.com/Rust-Zurich/events/265593126/).
+* [Nov 15. Barcelona, ES - Rust GTK/GStreamer Workshop at Linux Application Summit 2019](https://www.meetup.com/Barcelona-Free-Software/events/265596417/).
+
+### North America
+
+* [Nov  6. Indianapolis, IN, US - Indy.rs](https://www.meetup.com/indyrs/events/mffbtpyzpbjb/).
+* [Nov 13. Atlanta, GA, US - Grab a beer with fellow Rustaceans](https://www.meetup.com/Rust-ATL/events/qxqdgryzpbrb/).
+* [Nov 12. Seattle, WA, US - Seattle Rust Meetup - Monthly meetup](https://www.meetup.com/Seattle-Rust-Meetup/events/prbtdryzpbqb/).
+* [Nov 13. Vancouver, BC, CA - Vancouver Rust meetup](https://www.meetup.com/Vancouver-Rust/events/rwcpfryzpbrb/).
+* [Nov 14. San Diego, CA, US - San Diego Rust November Meetup](https://www.meetup.com/San-Diego-Rust/events/265981542/).
+* [Nov 14. Lehi, UT, US - Utah Rust - November 2019 Regular Meetup](https://www.meetup.com/utah-rust/events/265905259/).
+* [Nov 14. Columbus, OH, US - Columbus Rust Society - Monthly Meeting](https://www.meetup.com/columbus-rs/events/dpkhgryzpbsb/).
+
+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:[email protected]
+
+# Rust Jobs
+
+*Tweet us at [@ThisWeekInRust](https://twitter.com/ThisWeekInRust) to get your job offers listed here!*
+
+# Quote of the Week
+
+> …man, starting to dig through the source code of a really large open source program is so weird. It’s like wandering around a giant cathedral that’s being constantly renovated and repaired and maintained over the course of years by a giant team of invisible crafters and architects, who mostly communicate via notes and designs pinned to the walls in various places.
+
+– [icefoxen on their wiki](https://wiki.alopex.li/WhereRustcSpendsItsTime)
+
+Thanks to [Ralf Jung](https://users.rust-lang.org/t/twir-quote-of-the-week/328/717) for the suggestion!
+
+[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>