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To your average Joe, being “rusty” is not seen as a good thing.1 But readers of this blog know that being Rusty – with a capitol R! – is, of course, something completely different! So what is that makes Rust Rust? Our slogans articulate key...
Lately I’ve been iterating on an idea I call project goals. Project goals are a new kind of RFC that defines a specific goal that a specific group of people hope to achieve in a specific amount of time – for example, “Rusty Spoon Corp propo...
A few years back, the Async Wg tried something new. We collaboratively authored an Async Vision Doc. The doc began by writing “status quo” stories, written as narratives from our cast of characters, that described how people were experienci...
I’m on the plane back to the US from Belgium now and feeling grateful for having had the chance to speak at the EuroRust conference1. EuroRust was the first Rust-focused conference that I’ve attended since COVID (though not the first confer...
In the previous Polonius post, we formulated the original borrow checker in a Polonius-like style. In this post, we are going to explore how we can extend that formulation to be flow-sensitive. In so doing, we will enable the original Polon...
Rust helps you to build reliable programs. One of the ways it does that is by surfacing things to your attention that you really ought to care about. Think of the way we handle errors with Result: if some operation can fail, you can’t, ahem...
lqd has been doing awesome work driving progress on polonius. He’s authoring an update for Inside Rust, but the TL;DR is that, with his latest PR, we’ve reimplemented the traditional Rust borrow checker in a more polonius-like style. We are...
One of Rust’s core principles is “stability without stagnation”. This is embodied by our use of a “release train” model, in which we issue a new release every 6 weeks. Release trains make releasing a new release a “non-event”. Feature-based...
I recently posted a draft of an RFC about Return Type Notation to the async working group Zulip stream. In response, Josh Triplett reached out to me to raise some concerns. Talking to him gave rise to a 3rd idea for how to resolve the send...
In a previous post on async closures, I concluded that the best way to support async closures was with an async trait combinator. I’ve had a few conversations since the post and I want to share some additional thoughts. In particular, this...
I previously introduced the “send bound” problem, which refers to the need to add a Send bound to the future returned by an async function. This post continues my tour over the various solutions that are available. This post covers “Trait T...
In the previous post, I introduced the “send bound” problem, which refers to the need to add a Send bound to the future returned by an async function. I want to start talking about some of the ideas that have been floating around for how to...
Nightly Rust now has support for async functions in traits, so long as you limit yourself to static dispatch. That’s super exciting! And yet, for many users, this support won’t yet meet their needs. One of the problems we need to resolve is...
When I started working on Rust in 2011, my daughter was about three months old. She’s now in sixth grade, and she’s started growing rapidly. Sometimes we wake up to find that her clothes don’t quite fit anymore: the sleeves might be a littl...
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