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? Tweet us at @ThisWeekInRust or send us a pull request. Want to get involved? We love contributions.

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

News & Blog Posts

Crate of the Week

This week's crate, as decreed by llogiq, is im, a library for immutable data structures in Rust.

Submit your suggestions and votes for next week!

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.

If you are a Rust project owner and are looking for contributors, please submit tasks here.

149 pull requests were merged in the last week

Approved RFCs

Changes to Rust follow the Rust RFC (request for comments) process. These are the RFCs that were approved for implementation this week:

Every week the team announces the 'final comment period' for RFCs and key PRs which are reaching a decision. Express your opinions now.

No RFCs are currently in final comment period.

New RFCs

Upcoming Events

If you are running a Rust event please add it to the calendar to get it mentioned here. Email the Rust Community Team for access.

Rust Jobs

Tweet us at @ThisWeekInRust to get your job offers listed here!

Quote of the Week

When picking up a lentil (Result) a pigeon (?) must consider two options. If the lentil is a good one (Ok), the pigeon simply puts it into the pot (evaluates to the wrapped value). However, if the lentil happens to be a bad one (Err), the pigeon eats it, digests it (from) and finally “returns” it. Also the silhouette of a pigeon kind of resembles a questionmark.

– anatol1234 on internals

Thanks to Christopher Durham for the suggestion!

Submit your quotes for next week!

This Week in Rust is edited by: nasa42 and llogiq.