Mara
@m_ou_se
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Rust dev, Electronics engineer, Author, @rustlang Library team lead, ADHD, Polyamorous, Lesbian, She/Her
Delft, Nederland
Joined April 2009
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Got a new laptop with the wrong power plug. But nothing a little `unsafe` block can't solve. 😌 🦀 ⚡️
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"Nobody uses Rust in production", he emailed (with Thunderbird) from his laptop (running Windows) to a mailing list (on AWS, behind Cloudflare), which I then read (in Firefox) on my phone (running Android) after clicking a link (in Discord) to the list archive (served by Fastly).
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🦀📕 All chapters of my book, Rust Atomics and Locks, are now freely available online:
Enjoy! ✨
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⚛️📋 I made an overview of the ARMv8 and x86-64 machine instructions for all the common atomic operations:
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🐚 Brace expansion in shells like Bash and Zsh can be very useful to avoid repeating yourself. ✨
For example, if you want to do:
$ mv some_long_file_name.txt some_long_file_name.rs
You can write this instead:
$ mv some_long_file_name.{txt,rs}
Here's some ways to use braces:
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🆕🦀 A new exciting
@rustlang
feature coming up in Rust 1.58: format argument capturing! 🎉✨
Starting in Rust 1.58, which will be released as stable on January 13, you can refer to variables from within format strings:
let name = "world";
println!("Hello, {name}!");
Examples:
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🦀📕 Did I tell y'all I've been working on a book?! 🤩
Title: Rust Atomics and Locks
It's not finished yet! But it will be, later this year! ✨
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🦀📕 Here's a sneak preview of my book, Rust Atomics and Locks 📖
It's already available for pre-order! It should ship in December, so you can all read it during the holidays. ✨
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🐚 Did you know? Posix shell input/output redirection doesn't need to be at the end of the command. You can put it at the start or in the middle of the command too:
$ echo >file hello world
✨
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Hey
@rust_foundation
, maybe don't promote ponzi schemes.
As a reminder to everyone: the Rust Foundation is entirely separate from the Rust Project. They do not represent us, and they do not involve us in decisions like this.
Rust Foundation Silver Member
@_parastate
provides insight into how Rust can help reduce blockchain energy consumption.
Read the piece:
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Apparently the concept of users who are not men is "too controversial" in the SerenityOS project, "as to not alienate anyone*".
(*Anyone, as long as you go by he/him, of course.)
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🆕🦀 Just moments ago,
@rustlang
1.63.0 was released! 🎉
It's quite a big release, with even more exciting new features than usual!
Here's a thread with some of the highlights. 🧵
1/16
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I just tried to charge my phone by connecting it to my laptop (with USB-C), but instead of my phone, my *laptop* started getting charged, quickly draining my phone's battery. Uh, what. 👀
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I feel really uncomforatble calling something "Rust Global" when it's just an event the US, with nothing planned in other countries yet.
The US-centrism is an issue we must work on. This "Rust Global" announcement Tweet doesn't even mention the country, just "Bellevue, WA". :/
The Rust Foundation is thrilled to present
#rustglobal
: an event dedicated to driving collaboration b/w tech decision-makers &
#rustlang
users internationally.
The 1st Rust Global will be co-located w/
#WasmCon
on Sept 6.
More info here:
@linuxfoundation
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🦀📕 Rust Atomics and Locks is now available as ebook! 🎉
Pre-ordered printed copies should start shipping in a few weeks. ⌛️
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New programming outfit. ✨
(To wear while making the Rust standard library more gay. 🦀🏳️🌈)
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We're very close to stabilizing
@rustlang
2021! A few decisions and bugs are still left, but it looks like it'll be ready for inclusion in Rust 1.56! ✨🦀
We already tested the edition migration on the top 10'000 most downloaded crates, and will soon test *all* public crates. ⏳
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💶🦀 If more companies did this, for more maintainers, we could maintain Rust without the overhead and distractions of employment/contracting.
As sponsorship, this doesn't come with expectations/targets. It is recognition, and trusting I'll continue to do what is right for Rust.
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If you like
@rustlang
so much, stop trying to hire all the active Rust team members to work on something else. Sponsor us instead! ✨💶
"We love Rust and your work on the language and standard libary, so how about you quit doing that?" —Startup founders in all of our inboxes. 🙄
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🦀 As of Rust 1.62 (going into beta this week), std::sync::Mutex, RwLock, and Condvar no longer do any allocations on Linux. 🎉
Benchmarking locks is extremely tricky, as their performance depends heavily on the exact use case, but there are very noticable differences:
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🦀 New (cursed) Rust proc macro! This one expands to whatever `use` statements you need to make the rest of the code compile. 🪄 😄
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Hey you should buy my book:
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🆕🦀 Just a few hours ago, Rust 1.61 was released! ✨
Here's a thread with fourteen highlights:
1/16
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🆕🦀 A few hours ago,
@rustlang
1.64.0 was released! 🎉
Just like every six weeks, at every new release, here's a thread with some of the highlights. 🧵
1/15
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🦀💶 Who is sponsoring me for my work on
@rustlang
:
✅ Lots of individuals who care about Rust 💛
✅
@EmbarkStudios
and sometimes other tiny companies 💛
❌ Microsoft
❌ Amazon
❌ Google
❌ Huawei
❌ Facebook
❌ Any other big company using Rust
Open source funding is broken. 😞
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🆕🦀 Just moments ago,
@rustlang
1.62.0 was released! 🎉
As usual, a thread with some of the highlights. 🧵
1/9
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It's really cool how Steam lets me play Windows-only games on my MacBook by remotely launching them on my *Linux* desktop using Proton/Wine and then streaming it over the network with no noticable latency. It feels like this shouldn't be possible. ^^'
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🦀🇯🇵 私の本「詳解 Rustアトミック操作とロック」が日本語版で出版されました!
Rust Atomics and Locks is now available in Japanese!
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🦀✨
@rustlang
1.58.0 was released just now!
As usual, a thread to highlight some of the new features:
1/11
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For everyone worried about my safety:
1. I'm an electronics engineer. I know what I'm doing.
2. The power strip was switched off and not plugged in. See point 1.
3. I disassembled this right after taking the picture, so no one would accidentally power it. See also point 1.
(:
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We finished the design of the new
@rustlang
edition: Rust 2021! 🦀🎉
What are Rust editions? And what is changing in Rust 2021?
I wrote a blog post with all the answers:
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After 2 years of discussions, more than ten proposed renames, several hundred GitHub comments with over 10000 words in total, 4 proposed 'final' commenting periods, and several video calls, `bool::then()` has finally landed as stable today with the release of
@rustlang
1.50.0. 🎉
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Reminder that my book—Rust Atomics and Locks—is freely available online: 😊
(If you read it, please leave a review on )
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The Rust Evangelism (Crowd)Strike Force will continue the outages until everything is rewritten in Rust. 🦀🚀
For people looking for a conspiracy, the replacement language for C++, Rust, is compromised by a cabal of woke tards that are doing strange things.
It's possible this could be a plot to move mission-critical code to Rust. It's the only other language Linux is allowing, other
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🦀✨
@rustlang
1.57.0 was released just moments ago!
As usual, a thread to highlight some of the new features:
1/11
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🦀📔 What would you want to see in a book titled "Rust for C and C++ programmers"?
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🦀 I'm really excited about today's Rust release! 🥳
- offset_of!
- stripping release binaries by default!
- IP/socket types available in no_std!
- File::create_new (won't overwrite existing files)!
- more array and slice methods (each_ref, chunk methods)!
- Mutex::clear_poison!
Rust 1.77.0 is now available! 🦀🌈
This release comes with c"" string literals, offset_of!(), recursive async functions, stripping of binaries in release mode, File::create_new, Mutex::clear_poison, and more!
Check out the announcement and release notes:
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🦀 Happy new Rust! 🎆
Just now,
@rustlang
1.55 was released, shipping with some small but very nice improvements.
A thread:
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⚡️💡Two years ago, I wanted to explain some folks digital protocols like I²C. I wanted to skip the boring stuff; make it a hands-on experience. So I made these little boards that they could use as I/O pins and invent their own protocols to talk to each other across the table. 1/3
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🦀 This code compiles (and runs without panicking). 10 points if you can figure out how. 😁
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🦀 Do you have an Option<String>, but need an Option<&str>?
Or do you have an Option<Vec<T>>, but want an Option<&[T]>?
Or do you have an Option<Box<T>>, but require an Option<&T>?
There's a method for that: Option::as_deref()! ✨
Works on everything that implements Deref. ✨
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🦀💭 The gap between no_std and regular Rust is too large. With std, you basically assume there is a (Unix or Windows-like) filesystem, networking, "infallible" memory allocation, processes, locks, and so on. And in no_std, there is nothing. For too many use cases, neither works.
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✨ New unstable
@rustlang
feature: I've added `assert_matches!()`, which can be used to assert an expression matches a pattern. Like `assert_eq`, but doesn't require PartialEq and allows for some more flexibility. Available in tomorrow's nightly with #![feature(assert_matches)].
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The new stable version of
@rustlang
, Rust 1.52, was released just now! 🦀🎉
This release contains quite a few new small but significant features.
A thread.
1/10
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@chandlerc1024
When we switched from C++ to Rust, people with very little programming experience were suddenly writing embedded, systems, real-time, and/or performance critical software within weeks. I thought it was the type of software that made it hard to teach. But it was the language.
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🦀🌈✨Iterator::collect() in
@rustlang
can do more than you might think. It can collect Results and stop at the first Err & same for Options, it can concatenate Strings and OsStrings too, it can join Paths, it can produce Cows, and more:
([].into_iter() only works in Rust 2021.)
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🆕🦀 Just moments ago,
#rustlang
1.69.0 was released!
As usual, here's a thread with some of the highlights. 🧵
1/8
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"programming is serious and not a game [..] stop with the outfits and princess programmer stuff"
I think we should all start writing software and giving talks while wearing princess dresses. 👸👗👩💻
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🆕🦀 A bit more than a week ago,
@rustlang
1.60.0 was released! ✨
Here's a thread with ten highlights from this release:
1/12
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🦀🧮 Update: my fast integer🡘floating point conversion functions have been merged into both Rust's compiler-builtins and the .NET runtime. 😊
🦀📢 New blog post!
✨ Converting Integers to Floats Using Hyperfocus ✨
Making u128 to f64 conversion much faster through some manual bit twiddling. 🧮
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This year we'll be releasing a new edition of
@rustlang
: Rust 2021! Read about it on the Inside Rust Blog:
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“There are two ways of constructing a software design: One way is to make it so simple that there are obviously no deficiencies, and the other way is to make it so complicated that there are no obvious deficiencies.”
—Tony Hoare
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🦀📢 New blog post!
✨ Converting Integers to Floats Using Hyperfocus ✨
Making u128 to f64 conversion much faster through some manual bit twiddling. 🧮
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This happened to me several times, even when I was introduced as the CTO or founder. I asked technical questions, and the (engineering) candidate would not even look at me and give the answer to the man in the room. I asked follow up questions, but the responses went only to him.
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The community: 46 👍, 6 🎉!
The maintainer: Too controversial! Closed! Locked!
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Another big new feature in today's Rust release is let-else statements.
You can now write things like:
let Ok(a) = i32::from_str("123") else { return };
without needing an if or match statement. This can be useful to avoid deeply nested if statements.
3/10
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🦀📢 New blog post! 📝✨
Do we need a "Rust Standard"?
My views on whether we need a Rust standard, or a Rust specification, and an overview of what we already have and do in terms of stability, specification, and language evolution.
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🦀✨ New blog post! 📝
Comparing Rust's and C++'s Concurrency Library
A review of the concurrency features of the C++ standard library, and what their Rust equivalent might look like.
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@OtaK_
Fun fact: the most recent CVE in the Rust standard library (remove_dir_all) also applies to C++ standard library implementations. But in C++ it's just considered undefined behaviour and your own fault if any other process touches the file system, so it's not considered an issue.
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TIL Portal 2 crashes if you have too many cores.😬
"Out of thread ids. Decrease the number of threads or increase MAX_THREAD_IDS"
Googling that shows some leaked cs:go source with "const int MAX_THREAD_IDS = 128;". The game is probably allocating an ID per core, and a few more.
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🦀 I wrote a proposal for an #[export] attribute in Rust to allow for *dynamic* linking between Rust crates, without losing memory safety at the linker boundary.
This will make other ABI work aimed at Rust FFI directly usable between Rust crates as well.
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