In Pursuit of Laziness

Manish Goregaokar’s blog

Rust in 2018

A week ago we put out a call for blog posts for what folks think Rust should do in 2018.

This is mine.

Overall focus

I think 2017 was a great year for Rust. Near the beginning of the year, after custom derive and a bunch of things stabilized, I had a strong feeling that Rust was “complete”. Not really “finished”, there’s still tons of stuff to improve, but this was the first time stable Rust was the language I wanted it to be, and was something I could recommend for most kinds of work without reservations.

I think this is a good signal to wind down the frightening pace of new features Rust has been getting. And that happened! We had the impl period, which took some time to focus on getting things done before proposing new things. And Rust is feeling more polished than ever.

Like Nick, I feel like 2018 should be boring. I feel like we should focus on polishing what we have, implementing all the things, and improving our approachability as a language.

Basically, I want to see this as an extended impl period.

This doesn’t mean I’m looking for a moratorium on RFCs, really. Hell, in the past few days I’ve posted one pre-pre-RFC1, one pre-RFC, and one RFC (from the pre-RFC). I’m mostly looking for prioritizing impl work over designing new things, but still having some focus on design.

Language

I think Rust still has some “missing bits” which make it hard to justify for some use cases. Rust’s async story is being fleshed out. We don’t yet have stable SIMD or stable inline ASM. The microcontroller story is kinda iffy. RLS/clippy need nightly. I’d like to see these crystallize and stabilize this year.

I think this year we need to continue to take a critical look at Rust’s ergonomics. Last year the ergonomics initiative was really good for Rust, and I’d like to see more of that. This is kind of at odds with my “focus on polishing Rust” statement, but fixing ergonomics is not just new features. It’s also about figuring out barriers in Rust, polishing mental models, improving docs/diagnostics, and in general figuring out how to best present Rust’s features. Starting dialogues about confusing bits of the language and figuring out the best mental model to present them with is something we should continue doing. Sometimes this may need new features, indeed, but not always. We must continue to take a critical look at how our language presents itself to newcomers.

Community

I’d like to see a stronger focus in mentoring. Mentoring on rustc, mentoring on major libraries, mentoring on Rust tooling, mentoring everywhere. This includes not just the mentors, but the associated infrastructure – contribution docs, sites like servo-starters and findwork, and similar tooling.

I’m also hoping for more companies to invest back into Rust. This year Buoyant became pretty well known within the community, and many of their employees are paid to work on various important parts of the Rust ecosystem. There are also multiple consulting groups that contribute to the ecosystem. It’s nice to see that “paid to work on Rust” is no longer limited to Mozilla, and this is crucial for the health of the language. I hope this trend continues.

Finally, I want to see more companies talk about Rust. Success stories are really nice to hear. I’ve heard many amazing success stories this year, but a lot of them are things which can’t be shared.

Governance

Last year we started seeing the limits of the RFC process. Large RFCs were stressful for both the RFC authors and participating community members, and rather opaque for newer community members wishing to participate. Alternative models have been discussed; I’d like to see more movement on this front.

I’d also like to grow the moderation team; it is currently rather small and doesn’t have the capacity to handle incidents in a timely fashion.

Docs / Learning

I’d like to see a focus on improving Rust for folks who learn the language by trying things over reading books 2 3.

This means better diagnostics, better alternative resources like rustbyexample, etc. Improving mentorship helps here as well.

Of course, I’d like to see our normal docs work continue to happen.


I’m overall really excited for 2018. I think we’re doing great on most fronts so far, and if we maintain the momentum we’ll have an even-more-awesome Rust by the end of this year!


  1. This isn’t a “pre rfc” because I’ve written it as a much looser sketch of the problem and a solution

  2. There is literally no programming language I’ve personally learned through a book or formal teaching. I’ve often read books after I know a language because it’s fun and instructive, but it’s always started out as “learn extreme basics” followed by “look at existing code, tweak stuff, and write your own code”.

  3. Back in my day Rust didn’t have a book, just this tiny thing called “The Tutorial”. grouches incessantly