Title: This Week in Rust 212
Number: 212
Date: 2017-12-12
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

* [Rust and the case for WebAssembly in 2018](https://mgattozzi.com/rust-wasm).
* [Introducing TQL - An easy-to-use ORM for Rust](http://antoyo.ml/tql-easy-orm).
* [Introducing Conduit - A service mesh for Kubernetes written in Rust](https://buoyant.io/2017/12/05/introducing-conduit/).
* [Running Rust regex engine on JVM, via WebAssembly](https://github.com/cretz/asmble/tree/master/examples/rust-regex).
* [A tutorial on how to use Diesel ORM in Rust](http://spejss.com/index.php/2017/12/06/how-to-use-diesel-orm-in-rust/).
* [This week in Rust docs 85](https://guillaumegomez.github.io/this-week-in-rust-docs/blog/this-week-in-rust-docs-85).
* [video] [Why Rust is successful](https://www.youtube.com/watch?v=-Tj8Q12DaEQ).
* [podcast] [Rusty Spike Podcast - episode 11](https://rusty-spike.blubrry.net/2017/12/07/episode-11-dec-6-2017/). Fedora, Conduit, a WebAssembly game, The Playground, Criterion.rs, Diesel, Mercurial, Android, and iOS.

# Crate of the Week

This week's crate is [printpdf](https://crates.io/crates/printpdf), a pure Rust PDF-writing library that already has a lot of features (though I note a lot of
bool-taking methods). Thanks to [Felix Schütt](https://users.rust-lang.org/u/sharazam) 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.

* [Contribute to Rust's 2017 impl period](https://www.rustaceans.org/findwork/impl).

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

105 pull requests were [merged in the last week][merged]

[merged]: https://github.com/search?q=is%3Apr+org%3Arust-lang+is%3Amerged+merged%3A2017-12-04..2017-12-11

* [fix bad error message for cannot_reborrow_already_uniquely_borrowed](https://github.com/rust-lang/rust/pull/46572)
* [rustc_mir: promote references of statics from other statics](https://github.com/rust-lang/rust/pull/46524)
* [MIR borrowck: implement union-and-array-compatible semantics](https://github.com/rust-lang/rust/pull/46268)
* [incr.comp.: uncorporate the stable commandline arg hash and SVHs of upstream crates into the SVH](https://github.com/rust-lang/rust/pull/46427)
* [incr.comp.: enable query result caching for many more queries](https://github.com/rust-lang/rust/pull/46556)
* [coherence: fix is_knowable logic](https://github.com/rust-lang/rust/pull/46192)
* [rustc_trans: don't write discriminants for uninhabited variants](https://github.com/rust-lang/rust/pull/46521)
* [rustc: further tweak linkage in ThinLTO](https://github.com/rust-lang/rust/pull/46549)
* [stabilize abi_sysv64](https://github.com/rust-lang/rust/pull/46528)
* [add read, read_string, and write functions to std::fs](https://github.com/rust-lang/rust/pull/45837)
* [add Drop impl for linked_list::DrainFilter](https://github.com/rust-lang/rust/pull/46581)
* [compiletest: account for `ui` reference files when deciding to skip](https://github.com/rust-lang/rust/pull/46533)
* [rustdoc: improve search style](https://github.com/rust-lang/rust/pull/46502)

## New Contributors

* Agustin Chiappe Berrini
* Jonathan Strong
* JRegimbal
* Timo

## 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. [This week's FCPs][fcp] are:

[fcp]: https://github.com/rust-lang/rfcs/labels/final-comment-period

* [disposition: merge] [Fallible collection allocation 1.0](https://github.com/rust-lang/rfcs/pull/2116).
* [disposition: merge] [Implicit caller location (third try to the unwrap/expect line info problem)](https://github.com/rust-lang/rfcs/pull/2091).
* [disposition: merge] [Unsized rvalues](https://github.com/rust-lang/rfcs/pull/1909).
* [disposition: merge] [eRFC: Cargo build system integration](https://github.com/rust-lang/rfcs/pull/2136).
* [disposition: merge] [Type privacy and private-in-public lints](https://github.com/rust-lang/rfcs/pull/2145).

## New RFCs

* [Hex literals](https://github.com/rust-lang/rfcs/pull/2244). Introduce hex literals in the form of `h"00 aa cc ff"`.
* [Pointers to const fn:s](https://github.com/rust-lang/rfcs/pull/2238). Introduce the syntax `const fn(input_types..) -> return_type` as a type which `const fn`s may be coereced to.
* [Implement Debug, Eq, PartialEq, and Hash for libc structs](https://github.com/rust-lang/rfcs/pull/2235).
* [const bounds and methods](https://github.com/rust-lang/rfcs/pull/2237).

# Upcoming Events

* [Dec 14. Rust Nairobi - Writing a Rust library: Africa's Talking API wrapper in Rust](https://www.meetup.com/Rust-Nairobi/events/245535269/).
* [Dec 14. Rust release triage](https://internals.rust-lang.org/t/release-cycle-triage-proposal/3544).
* [Dec 14. Rust DC - Mid-month Rustful: Falcon](https://www.meetup.com/RustDC/events/243672324/).
* [Dec 14. Columbus Rust Society - Monthly Meeting](https://www.meetup.com/columbus-rs/events/czcwhlywqbsb/).
* [Dec 18. Rust London - Rust learning and hacking evening #6](https://www.meetup.com/Rust-London-User-Group/events/245327924/).
* [Dec 20. Rust London Meetup #19 - Show and Tell](https://www.meetup.com/Rust-London-User-Group/events/242846316/).
* [Dec 20. Rust Community Team Meeting at #rust-community on irc.mozilla.org](https://chat.mibbit.com/?server=irc.mozilla.org&channel=%23rust-community).
* [Dec 20. Rust Documentation Team Meeting at #rust-docs on irc.mozilla.org](https://chat.mibbit.com/?server=irc.mozilla.org&channel=%23rust-docs).
* [Dec 21. Cambridge Rust Meetup #6](https://www.meetup.com/Cambridge-Rust-Meetup/events/mgtcwnywqbcc/).
* [Dec 27. Rust Community Team Meeting at #rust-community on irc.mozilla.org](https://chat.mibbit.com/?server=irc.mozilla.org&channel=%23rust-community).
* [Dec 27. Rust Documentation Team Meeting at #rust-docs on irc.mozilla.org](https://chat.mibbit.com/?server=irc.mozilla.org&channel=%23rust-docs).
* [Dec 28. Rust release triage](https://internals.rust-lang.org/t/release-cycle-triage-proposal/3544).

If you are running a Rust event please add it to the [calendar] to get
it mentioned here. 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

* [Full-time Rust developer for iOS/Android app at Mullvad](https://mullvad.net/blog/2017/12/5/hiring-full-time-rust-developer-iosandroid-app/).

*Tweet us at [@ThisWeekInRust](https://twitter.com/ThisWeekInRust) to get your job offers listed here!*

# Quote of the Week

> Although rusting is generally a negative aspect of iron, a particular form of rusting, known as “stable rust,” causes the object to have a thin coating of rust over the top, and if kept in low relative humidity, makes the “stable” layer protective to the iron below

— [Wikipedia on rusting of iron](https://en.wikipedia.org/wiki/Rust).

Thanks to [leodasvacas](https://users.rust-lang.org/t/twir-quote-of-the-week/328/473) for the suggestion!

[Submit your quotes for next week][submit]!

[submit]: http://users.rust-lang.org/t/twir-quote-of-the-week/328

*This Week in Rust is edited by: [nasa42](https://github.com/nasa42) and [llogiq](https://github.com/llogiq).*