Hello and welcome to another issue of This Week in Rust! +Rust is a programming language empowering everyone to build reliable and efficient software. +This is a weekly summary of its progress and community. +Want something mentioned? Tag us at @ThisWeekInRust on Twitter or @ThisWeekinRust on mastodon.social, 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
+Foundation
+-
+
- Rust Foundation Joins Open Infrastructure Foundation as Associate Member +
- Rust Identified as Safer Coding Tool by NIST +
- Rewarding Resilience: Rust & the U.S. National Cybersecurity Strategy +
Project/Tooling Updates
+-
+
- Helix editor 23.03 released +
- Rustls 0.21.0 Released With Exciting New Features +
- Slint 1.0: The Next-Generation Native GUI Toolkit Matures +
- rust-analyzer changelog #175 +
- Introducing SeaStreamer - a stream processing toolkit for Kafka and Redis Streams +
- youki 0.0.5 has been released +
- Fluvio Connector Development Kit released +
Observations/Thoughts
+-
+
- Thoughts on async closures +
- How to speed up the Rust compiler in March 2023 +
- Two things that Rust does better than C++ +
- Rust Tidbits #1 +
- Follow up on cracking ZIP archives in Rust +
- 58 Rust Resources Every Learner Should Know in 2023 +
- [audio] AI-NC with Tom Miles +
- [audio] Servo with Josh Matthews +
Rust Walkthroughs
+-
+
- Building a Classic Mac OS App in Rust +
- Cross Compiling Rust Projects in GitHub Actions +
- Rust on the CH32V003 +
- Build your own CountMinSketch in Rust +
- [ZH] Build a Lua interpreter in Rust +
- Nine Rules for Creating Fast, Safe, and Compatible Data Structures in Rust (Part 1): Lessons from RangeSetBlaze +
- A definitive guide to sealed traits in Rust +
Miscellaneous
+-
+
- [video] Rust Wasm-Bindgen in 2 Minutes: Bridging the Gap Between WASM & JavaScript +
- Rust for C#/.NET Developers +
Crate of the Week
+This week's crate is keshvar, a library providing a host of information on every country.
+Thanks to Pouriya for the suggestion!
+Please submit your suggestions and votes for next week!
+Call for Participation
+Always wanted to contribute to open-source projects but did not 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.
+-
+
- Hyperswitch - Use newtype pattern for email addresses +
- Hyperswitch - Determine card brand from card BIN +
- Hyperswitch - Validate card number while accepting payment method information +
- man-in-the-middle-proxy - Transparent mode +
- man-in-the-middle-proxy - TLS Decoder +
- man-in-the-middle-proxy - Edit and resend requests +
- man-in-the-middle-proxy - Duplicate and resend requests +
- rusticify - Arrows parallel mode +
- ockam - Update ockam tcp-outlet create clap command to have defined default arguments +
- ockam - Update ockam forwarder create clap command to have defined default arguments +
- ockam - Display worker address in the output of ockam tcp-connection create clap command +
If you are a Rust project owner and are looking for contributors, please submit tasks here.
+Updates from the Rust Project
+390 pull requests were merged in the last week
+-
+
- initial support for return type notation (RTN) +
- specialization involving RPITITs is broken so ignore the diagnostic differences +
- add a builtin
FnPtrtrait that is implemented for all function pointers
+ - middle: emit error rather than delay bug when reaching limit +
- closures always implement
FnOncein new solver
+ - correctly substitute GAT's type used in
normalize_param_envincheck_type_bounds
+ - do not consider elaborated projection predicates for objects in new solver +
- don't ICE on
DiscriminantKindprojection in new solver
+ - don't ICE on placeholder consts in deep reject +
- erase impl regions when checking for impossible to eagerly monomorphize items +
- freshen normalizes-to hack goal RHS in the evaluate loop +
- improve error message when writer is forgotten in write and writeln macro +
- make init mask lazy for fully initialized/uninitialized const allocations +
- numeric vars can only be unified with numerical types in deep reject +
- simplify transmutes in MIR InstCombine +
- stable MIR: Add basic MIR body datastructures +
- stop special-casing
'staticin evaluation
+ - suggest ..= when someone tries to create an overflowing range +
- drop array patterns using subslices +
- add
IndexSliceto go withIndexVec
+ - use
&IndexSliceinstead of&IndexVecwhere possible
+ - partial stabilization of
once_cell
+ - optimize
LazyCellsize
+ - drop unstable
Option::contains, Result::contains, Result::contains_err
+ - use span of placeholders in
format_args!()expansion
+ - change
advance(_back)_byto return the remainder instead of the number of processed elements
+ binary_heap: Optimize Extend implementation
+- stabilize
binary_heap_retain
+ - hashbrown: optimize insertion to only use a single lookup +
- codegen_gcc: optimize bitreverse codegen +
- cargo: add delays to network retries +
- rustdoc + rustdoc-json support for
feature(non_lifetime_binders)
+ - rustdoc: run more HIR validation to mirror rustc +
- clippy: add large future lint +
- clippy: added the
unnecessary_box_returnslint
+ - clippy: flag
bufreader.lines().filter_map(Result::ok)as suspicious
+ - clippy: add suggestions to
extra_unused_type_parameters
+ - clippy:
arithmetic_side_effects: correctly handle division and module when the right-hand-side is unknown
+ - clippy: fix
nonminimal_bool #[allow]attributes
+ - clippy: fix allow attribute, items from macros in
items_after_statements
+ - clippy: ignore
file!()macro inprint_literal,write_literal
+ - clippy: in uninit checking, add fallback for polymorphic types +
- rust-analyzer: expand Macro Recursively: don't append "!" to non-bang macro name +
- rust-analyzer: feat: pop a notification prompting the user to add a Cargo.toml of unlinked file to the linkedProjects +
- rust-analyzer: fix stack overflow in
is_ty_uninhabited_from
+ - rust-analyzer: add missing autoborrow adjustment for index expressions +
- rust-analyzer: allow new, subsequent
rust-project.json-based workspaces to get proc macro expansion
+ - rust-analyzer: canonicalize rust-project.json manifest path +
- rust-analyzer: handle box and raw pointers correctly in
builtin_deref
+ - rust-analyzer: lower adjusts in simple index except the last one +
- rust-analyzer: properly handle local trait impls +
- rust-analyzer: recover from
pub()visibility modifier
+ - rust-analyzer: use
struct_tail_without_normalizationinExpectation::rvalue_hint
+ - rust-analyzer: use async block in async fn type inference +
- rust-analyzer: limited syntax support for return type notations (RTN) +
- rust-analyzer: missing runnable env on debug target +
Rust Compiler Performance Triage
+A large improvement in const evaluation (particularly for large types) in +#109670 and a large +improvement to many-paged rustdoc workloads in +#109876 by removing quadratic +behavior. Regressions are comparatively limited this week.
+Triage done by @simulacrum. +Revision range: cbc064b341be231403d181402a786cce7f1c73f1..7c96e40da81165beef4f273f44e96eeef5a1bd30
+Summary:
+| (instructions:u) | +mean | +range | +count | +
|---|---|---|---|
| Regressions ❌ (primary) |
+2.3% | +[0.4%, 8.4%] | +18 | +
| Regressions ❌ (secondary) |
+1.6% | +[0.3%, 10.7%] | +26 | +
| Improvements ✅ (primary) |
+-2.5% | +[-77.6%, -0.3%] | +63 | +
| Improvements ✅ (secondary) |
+-4.0% | +[-27.9%, -0.3%] | +52 | +
| All ❌✅ (primary) | +-1.4% | +[-77.6%, 8.4%] | +81 | +
1 Regressions, 4 Improvements, 3 Mixed; 2 of them in rollups +54 artifact comparisons made in total
+ +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.
+RFCs
+-
+
- No RFCs entered Final Comment Period this week. +
Tracking Issues & PRs
+-
+
- [disposition: merge] rustdoc-search: add support for nested generics +
- [disposition: merge] Tracking Issue for const_ptr_read +
- [disposition: merge] Uplift
clippy::{drop,forget}_{ref,copy}lints
+ - [disposition: close] Tracking issue for the #[alloc_error_handler] attribute (for no_std + liballoc) +
- [disposition: merge] Implement Neg for signed non-zero integers. +
- [disposition: merge] Tracking Issue for IsTerminal / is_terminal +
- [disposition: close] Tracking Issue for array_zip +
New and Updated RFCs
+-
+
- [new] ABI-stabilize
core::task::Waker
+
Call for Testing
+An important step for RFC implementation is for people to experiment with the +implementation and give feedback, especially before stabilization. The following +RFCs would benefit from user testing before moving forward:
+-
+
- No RFCs issued a call for testing this week. +
If you are a feature implementer and would like your RFC to appear on the above list, add the new call-for-testing
+label to your RFC along with a comment providing testing instructions and/or guidance on which aspect(s) of the feature
+need testing.
Upcoming Events
+Rusty Events between 2023-04-05 - 2023-05-03 🦀
+Virtual
+-
+
- 2023-04-05 | Virtual (Indianapolis, IN, US) | Indy Rust + +
- 2023-04-05 | Virtual (Stuttgart, DE) | Rust Community Stuttgart
-
+
- Rust-Meetup +
+ - 2023-04-06 | Virtual (Tehran, IR) | Iran Rust Meetup + +
- 2023-04-08 | Virtual | Rust GameDev + +
- 2023-04-08 | Virtual | Ukrainian Rust Community + +
- 2023-04-11 | Virtual (Berlin, DE) | Berline.rs - OpenTechSchool Berlin + +
- 2023-04-11 | Virtual (Dallas, TX, US) | Dallas Rust + +
- 2023-04-11 | Virtual | Rust Live + +
- 2023-04-11 | Virtual (Saarbrücken, DE) | Rust-Saar + +
- 2023-04-12 | Virtual (Boulder, CO, US) | Boulder Elixir and Rust + +
- 2023-04-12 | Virtual (Cardiff, UK) | Rust and C++ Cardiff + +
- 2023-04-13 | Virtual (Charlottesville, VA, US) | Charlottesville Rust Meetup + +
- 2023-04-13 | Virtual (Nürnberg, DE) | Rust Nuremberg + +
- 2023-04-18 | Virtual (Washington, DC, US) | Rust DC + +
- 2023-04-19 | Virtual (Vancouver, BC, CA) | Vancouver Rust + +
- 2023-04-20 | Virtual (Munich, DE) | Rust Munich + +
- 2023-04-20 | Virtual (Stuttgart, DE) | Rust Community Stuttgart
-
+
- Rust-Meetup +
+ - 2023-04-25 | Virtual (Dallas, TX, US) | Dallas Rust
-
+
- Last Tuesday +
+ - 2023-04-26 | Virtual (Cardiff, UK) | Rust and C++ Cardiff + +
- 2023-04-27 | Virtual (Charlottesville, VA, US) | Charlottesville Rust Meetup + +
- 2023-04-29 | Virtual (Nürnberg, DE) | Rust Nuremberg + +
- 2023-05-02 | Virtual (Buffalo, NY, US) | Buffalo Rust Meetup + +
- 2023-05-03 | Virtual (Indianapolis, IN, US) | Indy Rust + +
Asia
+-
+
- 2023-04-08 | Beijing, CN | Rust Chinese Group + +
- 2023-04-08 | Kyoto, JP | Kansai Rust + +
- 2023-04-12 | Kuala Lumpur, MY | Rust Malaysia; Telegram + +
- 2023-04-18 | Tokyo, JP | Tokyo Rust Meetup + +
Europe
+-
+
- 2023-04-05 | Cologne, DE | Rust Cologne + +
- 2023-04-06 | Lyon, FR | Rust Lyon + +
- 2023-04-13 | Roma, IT | Rust Roma + +
- 2023-04-13 | Wrocław, PL | Rust Wrocław + +
- 2023-04-19 | Paris, FR | Rust Paris + +
- 2023-04-19 | Trondheim, NO | Rust Trondheim + +
- 2023-04-19 | Zurich, CH | Rust Zurich + +
- 2023-04-20 | Aarhus, DK | Rust Aarhus + +
- 2023-04-20 | Munich, DE + Virtual | Rust Munich + +
- 2023-04-20 | Bern, CH | Rust Bern + +
- 2023-04-21 | Stuttgart, DE | Rust Community Stuttgart + +
- 2023-05-02 | Amsterdam, NL | Rust Developers Amsterdam Group + +
- 2023-05-10 | Amsterdam, NL | RustNL
-
+
- RustNL 2023 +
+
North America
+-
+
- 2023-04-08 | Durham, NC, US | Triangle Rust + +
- 2023-04-13 | New York, NY, US | Rust NYC + +
- 2023-04-18 | San Francisco, CA, US | San Francisco Rust Study Group + +
Oceania
+-
+
- 2023-04-13 | Sydney, NSW, AU | Rust Sydney + +
If you are running a Rust event please add it to the calendar to get +it mentioned here. Please remember to add a link to the event too. +Email the Rust Community Team for access.
+Jobs
+ + +Please see the latest Who's Hiring thread on r/rust
+Quote of the Week
+++ +As usual, the borrow checker is correct: we are doing memory crimes.
+
Thanks to Jelte Fennema for the suggestion!
+Please submit quotes and vote for next week!
+This Week in Rust is edited by: nellshamrell, llogiq, cdmistman, ericseppanen, extrawurst, andrewpollack, U007D, kolharsam, joelmarcey, mariannegoldin, bennyvasquez.
+Email list hosting is sponsored by The Rust Foundation
+ +