This Week In Rust 531#

2024-01-24

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 and archives can be viewed at this-week-in-rust.org. If you find any errors in this week's issue, please submit a PR.

Updates from Rust Community#

Foundation#

• Q4 2023 Recap from Rebecca Rumbul

Project/Tooling Updates#

• Ruffle 2023 in review
• Four challenges cargo-semver-checks has yet to tackle
• rustc_codegen_gcc: Progress Report #29
• Roadmap for the Xilem backend in 2024
• rust-analyzer changelog #217
• pq-sys 0.5.0
• What's new in SeaORM 0.12.x
• Rust on Espressif chips - January 24 2024

Observations/Thoughts#

• Making Rust binaries smaller by default
• My Best and Worst Deadlock in Rust
• Why SQL hang for exactly 940s? TCP and Async Rust!
• Making Async Rust Reliable
• Identifying Rust’s collect::() memory leak footgun
• [video] embassy is now on crates.io
• [video] Rust full stack web frameworks have a bright future
• [video] Rust Halifax - Rust & Tell #1
• [video] Why Rust will keep growing in 2024

Rust Walkthroughs#

• Using mem::take to reduce heap allocations
• Writing your own Rust linter
• Using Serde in Rust
• Parsing JSON in Rust
• Billion-row challenge: Rust walkthrough
• Embassy on ESP: Timers
• Supporting LoRa on the SparkFun expLoRaBLE Thing Plus with Rust
• How to work with !Sized types in Rust
• Rocket - logging in the web application
• Rocket - access custom configuration in the routes
• Testing with tempfiles and environment variables

Research#

• Profiling Programming Language Learning
• Rust-lancet: Automated Ownership-Rule-Violation Fixing with Behavior Preservation

Crate of the Week#

This week's crate is apistos, an OpenAPI documentation tool.

Thanks to Romain Lebran for the self-suggestion!

Please submit your suggestions and votes for next week!

Call for Participation; projects and speakers#

CFP - Projects#

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.

• Ockam - Have a single SqlxDatabase instance per process
• Ockam - Improve database migrations to pair sql and rust migration code
• Ockam - Make install.sh not fail during upgrade process
• Hyperswitch - [FEATURE]: Make cache configuration configurable at runtime
• Hyperswitch - [FEATURE]: Implement Code cov for local system using makefile
• Hyperswitch - [FEATURE]: Setup code coverage for local tests & CI
• Hyperswitch - [FEATURE]: Add domain type for client secret
• Hyperswitch - [FEATURE]: Have get_required_value to use ValidationError in OptionExt

If you are a Rust project owner and are looking for contributors, please submit tasks here.

CFP - Speakers#

Are you a new or experienced speaker looking for a place to share something cool? This section highlights events that are being planned and are accepting submissions to join their event as a speaker.

If you are an event organizer hoping to expand the reach of your event, please submit a link to the submission website through a PR to TWiR.

Updates from the Rust Project#

453 pull requests were merged in the last week

• HashMap/HashSet: forward fold implementations of iterators
• dead_code treats #[repr(transparent)] the same as #[repr(C)]
• fix(rust-analyzer): use new pkgid spec to compare
• large_assignments: Lint on specific large args passed to functions
• maybe_lint_impl_trait: separate is_downgradable from is_object_safe
• never_patterns: Count ! bindings as diverging
• never_patterns: typecheck never patterns
• pat_analysis: Don't rely on contiguous VariantIds outside of rustc
• pattern_analysis: Remove Ty: Copy bound
• proc_macro: Add Literal::c_string constructor
• single_use_lifetimes: Don't suggest deleting lifetimes with bounds
• add #[track_caller] to the "From implies Into" impl
• add Ipv6Addr::is_ipv4_mapped
• add PatKind::Err to AST/HIR
• add help message for exclusive_range_pattern error
• add private NonZero<T> type alias
• add way to express that no values are expected with check-cfg
• added NonZeroXxx::from_mut(_unchecked)?
• allow any const expression blocks in thread_local!
• always use RevealAll for const eval queries
• avoid ICEs in trait names without dyn
• consolidate logic around resolving built-in coroutine trait impls
• deny braced macro invocations in let-else
• detect NulInCStr error earlier
• improve let_underscore_lock
• improved collapse_debuginfo attribute, added command-line flag
• make unsafe_op_in_unsafe_fn migrated in edition 2024
• restrict access to the private field of newtype indexes
• simplify closure_env_ty and closure_env_param
• suggest .swap() when encountering conflicting borrows from mem::swap on a slice
• undeprecate lint unstable_features and make use of it in the compiler
• make MIR pass name a compile-time constant
• make stable_mir::with_tables sound
• SMIR: make the remaining "private" fields actually private
• use an interpreter in MIR jump threading
• use implied bounds compat mode in MIR borrowck
• validate AggregateKind types in MIR
• sandwich MIR optimizations between DSE
• cache local DefId-keyed queries without hashing
• pack u128 in the compiler to mitigate new alignment
• use UnhashMap for a few more maps
• fold arithmetic identities in GVN
• optimize large array creation in const-eval
• implement iterator specialization traits on more adapters
• optimize EscapeAscii's Display and CStr's Debug
• stabilise bound_map
• stabilize round_ties_even
• stabilize slice_first_last_chunk
• stabilize single-field offset_of!
• implement strict integer operations that panic on overflow
• core: introduce split_at{,_mut}_checked
• un-hide iter::repeat_n
• fix deallocation with wrong allocator in (A)Rc::from_box_in
• use bool instead of PartialOrd as return value of the comparison closure in {slice,Iterator}::is_sorted_by
• regex: make Input::new guard against incorrect AsRef implementations
• cargo-rustdoc: use same path by output format logic everywhere
• cargo: use pkgid spec in in JSON messages
• cargo: remap common prefix only
• cargo doc: add a heading to highlight "How to find features enabled on dependencies"
• cargo: inherit jobserver from env for all kinds of runner
• cargo: fix precise-prerelease tracking link
• cargo: go back to passing an empty values() when no features are declared
• cargo: improve GitHub Actions CI config
• rustdoc: Allows links in headings
• rustdoc: hide modals when resizing the sidebar
• rustfmt: check that a token can begin a nonterminal kind before parsing it as a macro arg
• rustfmt: add config option generated_marker_line_search_limit
• clippy: blocks_in_conditions: do not warn if condition comes from macro
• clippy: default_numeric_fallback: improve const context detection
• clippy: no_effect_underscore_binding: _ prefixed variables can be used
• clippy: unused_io_amount captures Ok(_)s
• clippy: add suspicious_open_options lint
• clippy: correctly handle type relative in trait_duplication_in_bounds lint
• clippy: don't emit derive_partial_eq_without_eq lint if the type has the non_exhaustive attribute
• clippy: find function path references early in the same lint pass
• clippy: fix FP on semicolon_if_nothing_returned
• clippy: fix multiple_crate_versions to correctly normalize package names to avoid missing the local one
• clippy: fix warning span for no_effect_underscore_binding
• clippy: respect #[allow] attributes in single_call_fn lint
• clippy: improve wording and fix dead link in description of arc_with_non_send_sync lint
• rust-analyzer: add "One" import granularity
• rust-analyzer: add a new config to allow renaming of non-local defs
• rust-analyzer: goto type actions for notable trait hovers
• rust-analyzer: show additional value information when hovering over literals
• rust-analyzer: show notable implemented traits on hover
• rust-analyzer: add error recovery for use_tree_list parsing
• rust-analyzer: fix panic when extracting struct from enum variant
• rust-analyzer: fix progress reporting getting stuck
• rust-analyzer: handle SelfParam better in "Inline call"
• rust-analyzer: include for construct in convert to guarded return conditions
• rust-analyzer: infer OUT_DIR when workspace root contains a symlink
• rust-analyzer: make value_ty query fallible
• rust-analyzer: parse macro_rules as macro name

Upcoming Events#

Rusty Events between 2024-01-24 - 2024-02-21 🦀

Virtual#

• 2024-01-24 | Virtual (Berlin, DE) | WeAreDevelopers Community
  • WeAreDevelopers LIVE - Rust Day
• 2024-01-25 | Virtual (Charlottesville, NC, US) | Charlottesville Rust Meetup
  • Crafting Interpreters in Rust Collaboratively
• 2024-01-25 | Virtual (Linz, AT) | Rust Linz
  • Rust Meetup Linz - 36th Edition
• 2024-01-25 | Virtual (Mexico City, DF, MX) | Rust MX
  • Iniciando 2024 con Rust
• 2024-01-28 | Virtual (Wrocław, PL) | Stacja IT Wrocław
  • Wprowadzenie do języka Rust
• 2024-01-30 | Virtual | Bevy Game Development
  • Bevy Meetup #1
• 2024-01-30 | Virtual (Buffalo, NY, US) | Buffalo Rust User Group
  • Buffalo Rust User Group
• 2024-01-30 | Virtual (Dallas, TX, US) | Dallas Rust
  • Last Tuesday
• 2024-01-31 | Virtual (Cardiff, UK) | Rust and C++ Cardiff
  • Rust for Rustaceans Book Club launch!
• 2024-02-01 | Virtual + In Person (Barcelona, ES) | BcnRust
  • 12th BcnRust Meetup - Stream
• 2024-02-01 | Virtual (Berlin, DE) | OpenTechSchool Berlin + Rust Berlin
  • Rust Hack n Learn | Mirror: Rust Hack n Learn
• 2024-02-03 | Virtual + In-person (Brussels, BE) | FOSDEM 2024
  • FOSDEM Conference: Rust devroom - talks
• 2024-02-03 | Virtual (Kampala, UG) | Rust Circle
  • Rust Circle Meetup
• 2024-02-04 | Virtual | Rust Maven
  • Web development with Rocket - In English
• 2024-02-07 | Virtual (Indianapolis, IN, US) | Indy Rust
  • Indy.rs - with Social Distancing
• 2024-02-08 | Virtual (Charlottesville, NC, US) | Charlottesville Rust Meetup
  • Crafting Interpreters in Rust Collaboratively
• 2024-02-08 | Virtual (Nürnberg, DE) | Rust Nüremberg
  • Rust Nürnberg online
• 2024-02-10 | Virtual (Wrocław, PL) | Stacja IT Wrocław
  • Rust – budowanie narzędzi działających w linii komend
• 2024-02-13 | Virtual (Dallas, TX, US) | Dallas Rust
  • Second Tuesday
• 2024-02-15 | Virtual (Berlin, DE) | OpenTechSchool Berlin + Rust Berlin
  • Rust Hack n Learn | Mirror: Rust Hack n Learn
• 2024-02-21 | Virtual (Vancouver, BC, CA) | Vancouver Rust

  • Rust Study/Hack/Hang-out

Europe#

• 2024-01-24 | Zagreb, HR | impl Zagreb for Rust
  • Rust Meetup 2024/01: WebGPU intro using Rust
• 2024-01-25 | Augsburg, DE | Rust Meetup Augsburg
  • Augsburg Rust Meetup #5: Async Part2 and Async in action
• 2024-01-25 | Vienna, AT | Rust Vienna
  • Rust Vienna Meetup - January - Blockchains and Data Pipelines
• 2024-02-01 | Hybrid (Barcelona, ES) | BcnRust
  • 12th BcnRust Meetup
• 2024-02-03 | Brussels, BE | FOSDEM '24
  • FOSDEM '24 Conference: Rust devroom - talks | Rust Aarhus FOSDEM Meetup
• 2024-02-03 | Nürnberg, BY, DE | Paessler Rust Camp 2024
  • Paessler Rust Camp 2024
• 2024-02-06 | Bremen, DE | Rust Meetup Bremen
  • Rust Meetup Bremen [1]
• 2024-02-07 | London, UK | Rust London User Group
  • Rust for the Web — Mainmatter x Shuttle Takeover
• 2024-02-08 | Bern, CH | Rust Bern

  • Rust Bern Meetup #1 2024 🦀

North America#

• 2024-01-24 | Austin, TX, US | Rust ATX
  • Rust Lunch - Fareground
• 2024-01-27-28 | Calgary, AB, CA | Rust Calgary
  • Harnessing Rust for Real-World Problems hackathon: Day 1
  • Harnessing Rust for Real-World Problems hackathon: Day 2
• 2024-01-25 | Mountain View, CA, US | Mountain View Rust Meetup
  • Rust Study/Hack/Hang-out
• 2024-01-30 | Cambridge, MA, US | Boston Rust Meetup
  • Harvard Square Rust Lunch
• 2024-02-07 | Brookline, MA, US | Boston Rust Meetup
  • Coolidge Corner Brookline Rust Lunch, Feb 7
• 2024-02-12 | Minneapolis, MN, US | Minneapolis Rust Meetup
  • Minneapolis Rust: Open Source Contrib Hackathon & Happy Hour
• 2024-02-13 | New York, NY, US | Rust NYC
  • Rust NYC Monthly Mixer
• 2024-02-13 | Seattle, WA, US | Cap Hill Rust Coding/Hacking/Learning
  • Rusty Coding/Hacking/Learning Night
• 2024-02-15 | Boston, MA, US | Boston Rust Meetup
  • Back Bay Rust Lunch, Feb 15
• 2024-02-15 | Seattle, WA, US | Seattle Rust User Group

  • Seattle Rust User Group Meetup

Oceania#

• 2024-02-06 | Perth, WA, AU | Perth Rust Meetup Group
  • Rust Feb 2024 Meetup

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#

The functional ML roots of the language, Graydon's first Rust compiler was written in OCaml, shine through, influencing it right from the start.

It's not "C++ but better".

It's Haskell standing on Lisp's shoulders, hiding in C's coat to sneak into PRDCTN. (The fancy nightclub where all the popular language's hang out)

– tris on his "No Boilerplate" Youtube channel

Thanks to PrototypeNM1 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

Discuss on r/rust