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.

Updates from Rust Community

News & Blog Posts

Crate of the Week

This week's crate is generational-arena, a safe arena allocator that allows deletion without suffering from the ABA problem by using generational indices. Thanks to Willi Kappler for the suggestion!

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.

Updates from Rust Core

140 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:

Final Comment Period

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


Tracking Issues & PRs

New RFCs

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Quote of the Week

Bastion of the Turbofish

Beware travellers, lest you venture into waters callous and unforgiving, where hope must abandoned, ere it is cruelly torn from you. For here stands the bastion of the Turbofish: an impenetrable fortress holding unshaking against those who would dare suggest the supererogation of the Turbofish.

Once I was young and foolish and had the impudence to imagine that I could shake free from the coils by which that creature had us tightly bound. I dared to suggest that there was a better way: a brighter future, in which Rustaceans both new and old could be rid of that vile beast. But alas! In my foolhardiness my ignorance was unveiled and my dreams were dashed unforgivingly against the rock of syntactic ambiguity.

This humble program, small and insignificant though it might seem, demonstrates that to which we had previously cast a blind eye: an ambiguity in permitting generic arguments to be provided without the consent of the Great Turbofish. Should you be so naïve as to try to revolt against its mighty clutches, here shall its wrath be indomitably displayed. This program must pass for all eternity, fundamentally at odds with an impetuous rebellion against the Turbofish.

My heart aches in sorrow, for I know I am defeated. Let this be a warning to all those who come after. Here stands the bastion of the Turbofish.

varkor on the rust github.

Thanks to Mazdak Farrokhzad for the suggestion!

Please submit your quotes for next week!

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

Discuss on r/rust.