Rust周报 391(译)

• this-week-in-rust
• 日期：2021-05-19
• 原文：391 期

你好，欢迎再来一期本周的螃蟹行情！Rust是一种追求三位一体的系统语言：安全性、并发性和速度。这是它的进展和社区的每周总结。有什么要说的吗？推特@ThisWeekInRust或向我们发送请求。 想参与吗？我们热爱贡献.

这本周的螃蟹行情是在在 Github 上公开的。如果你在本周的问题中发现任何错误，请提交 PR。

Updates from Rust Community

本周没有新闻通讯或研究论文。

Official

• Announcing Rustup 1.24.2
• Six Years of Rust

Project/Tooling Updates

• rust-analyzer Changelog #77
• IntelliJ Rust Changelog #147
• GCC Rust Weekly Status Report 15
• MoonZoon Dev News (3): Signals, React-like Hooks, Optimizations
• Alacritty Version 0.8.0
• Micromath 2.0.0: approximation-based embedded arithmetic, 2D/3D vector, quarternion, and statistics library（算术运算）
• This Week In TensorBase 3

Observations/Thoughts

• Scylla Developer Hackathon: Rust Driver
• Plugins in Rust: The Technologies
• gRPC load-balancing in Rust
• Verifying vectorized Rust revisited（Rust 验证工具的思考）
• Routes to Discovering Rust
• How we utilized fuzzing to improve security in the TezEdge node，created an open-source CI tool for Rust code fuzzing
• Boost productivity with Rust
• Building ‘Outer Wonders for Linux’
• Behind the scenes of ‘1Password for Linux’
• Writing Pythonic Rust
• Upgradable parking_lot::RwLock might not be what you expect
• Why Rust for Embedded Development?

Rust Walkthroughs

• 身份认证机制 in Rust web applications
• Understanding Rust Privacy and Visibility Model
• Things you can’t do in Rust (and what to do instead)
• State Management With WebAssembly and Rust
• Implementing ‘Linked List’ in Rust
• How to use gRPC with Rust Tonic and Postgres database with examples
• Generating pre-signed S3 URLs in Rust
• A simple user input collection, validation, and conversion library in Rust
• How to make a cryptocurrency Telegram bot with Rust and Teloxide
• ‘Infinite Mixture Model’ in Rust with RV 0.12（统计工具）
• Optimizing HashMaps even more
• Inventing the Service trait
• Rust Macros Rule: DRY warp Routes
• Error Handling in Rust - A Deep Dive
• [DE] speicherverwaltung in rust
• [ES] cómo utilizar rust web framework warp
• [PT] o que é dyn no rust?
• [ZH] practice of rendering markdown to html in rust (rust web 开发中，将 markdown 渲染为 html 的实践)
• [ZH] [series] Build GraphQL services based on Async Rust using actix-web + async-graphql + rbatis + postgresql / mysql (基于 actix-web + async-graphql + rbatis + postgresql / mysql 构建异步 Rust GraphQL 服务) - Part 4
• [video] the rust borrow checker - a deep dive @ rust dc, april 20 2021 w/ nell shamrell-harrington

Miscellaneous

• James Munns on the state and the future of embedded & safety-critical Rust | Emergence Podcast
• Rust 2021 edition to arrive in October with ‘more consistent panic’ and other new features
• SpaceX about the Rust Programming Language!

Crate of the Week

这周的箱子是arraygen，派生 proc 宏，可从结构，生成数组。

谢谢José Manuel Barroso Galindo提名

Submit your suggestions and votes for next week！

Call for Participation

一直想为开源项目做贡献，但不知道从哪里开始？每周我们都会重点介绍 Rust 社区中的一些任务，供您选择和开始！

其中一些任务也可能有导师，请访问任务页面以获取更多信息。

如果您是 Rust 项目的所有者并且正在寻找贡献者，请提交任务here。

没有针对 CfP 提出任何问题。

Updates from Rust Core

共有 333 个拉取请求merged in the last week

• add auto traits and clone trait migrations，for（RFC#2229）
• insignificant destructors for RFC #2229
• add asm!() support for PowerPC
• add asm!() support for PowerPC64
• add support for const operands and options to global_asm!
• recover from invalid struct item syntax
• fix diagnostic for cross crate private tuple struct constructors
• fix suggestions for missing return type lifetime specifiers
• suggest adding a type parameter for impls
• fix stack overflow when checking for structural recursion
• implement span quoting for proc-macros
• handle more span edge cases in generics diagnostics
• improve diagnostics for GATs
• show macro name in ‘this error originates in macro’ message
• store VariantIdx to distinguish enum variants
• remove CrateNum parameter for queries that only work on local crate
• adjust target search algorithm for rustlib path
• don’t suggest adding 'static lifetime to arguments
• improve error message for non-exhaustive matches on non-exhaustive enums
• allow async {} expressions in const contexts
• warn about unused pub fields in non-pub structs
• fix unused attributes on macro_rules
• box Impl.blanket_impl to reduce size
• #[inline(always)] on basic pointer methods
• make unchecked_{add, sub, mul} inherent methods unstably const
• BTree: no longer copy keys and values before dropping them
• str::is_char_boundary - slight optimization
• futures-macro: improve diagnostics on type mismatch
• futures: implement try_chunks
• futures: change SelectAll iterators to return stream instead of StreamFuture
• futures: expose iterators from SelectAll
• futures: SelectAll::clear
• futures: FuturesUnordered::clear
• futures: change StreamExt::scan to pass state to closure by value
• futures: abortable streams
• cargo: improve performance of git status check in cargo package
• rustdoc: minimize amount of fake DefIds used in rustdoc
• clippy: add needless_bitwise_bool lint
• clippy: new lint: unused_async
• clippy: move inconsistent_struct_constructor to pedantic
• clippy: needless_collect enhancements
• clippy: while_let_on_iterator improvements
• clippy: add Sized trait for wrong_self_convention lint test
• clippy: match_single_binding: fix invalid suggestion when match scrutinee has side effects
• clippy: trigger wrong_self_convention only if it has implicit self
• clippy: stop linting ‘else if let’ pattern in option_if_let_else lint
• clippy: fix false positives about generic args
• clippy: fix a manual_unwrap_or false positive with deref coercion

Rust Compiler Performance Triage

本周基准测试结果中，有很多噪音。我们正在讨论（zulip archive，live zulip）如何最好地更新基准测试集合，以消除反复出现的嘈杂情况。除此之外，对一些单独的基准，进行了一些重大改进。

内存使用情况（max-rss）似乎基本持平。除了tuple-stess表明较一周前，内存增加了 4％。

分流由 @pnkfelix。修订范围：382f..25a2

5 个退步，7 个改进，2 个汇总中的 1 个

Full report here。

Approved RFCs

对 Rust 的更改跟随 RustRFC (request for comments) process。以下是本周批准实施的 RFC：

本周未批准任何 RFC。

Final Comment Period

每周the team宣布即将做出决定的 RFC 和主要 PR 的“最终意见征询期”。立即发表您的意见。

RFCs

• [disposition: merge] RFC: 2021 Edition
• [disposition: postpone] Allow Overloading || and &&

Tracking Issues & PRs

• [disposition: merge] stabilize const_fn_unsize
• [disposition: merge] rustc: Allow safe #[target_feature] on wasm
• [disposition: merge] stabilize int_error_matching
• [disposition: merge] Show test type during prints
• [disposition: merge] stabilize member constraints
• [disposition: merge] Move UnwindSafe, RefUnwindSafe, AssertUnwindSafe to core
• [disposition: merge] Use try_reserve in Vec’s io::Write
• [disposition: merge] Add functions Duration::try_from_secs_{f32, f64}
• [disposition: close] Allow unused variables with todo!

New RFCs

• Pinned synchronization primitives

Quote of the Week

我经常将 Rust 视为开发编程语言的过程和社区，而不仅是编程语言本身。

– throwaway894345 on hacker news

Thanks to Krishna Sundarram for the suggestion!

Please submit quotes and vote for next week!

This Week in Rust is edited by: nellshamrell, llogiq, and cdmistman.

Discuss on r/rust