Rust周报 406(译)

• this-week-in-rust
• 日期：2021-09-01
• 原文：406 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。 Rust*公开开发on GitHub.如果您在本周的问题中发现任何错误，please submit a PR

Updates from Rust Community

Newsletters

• RiB Newsletter #27

Project/Tooling Updates

• Rust Analyzer Changelog #92
• IntelliJ Rust Changelog #154
• GCC Rust Monthly Report #9 August 2021
• Bebop v2.3.0: Adding Rust support to Bebop serialization
• partial-borrow: derive macro 语法，制造 一个 ‘struct’ 的多个引用 (maybe mut)
• Zellij 0.16.0 released: new UI, many bugfixes and more!
• Knurling-rs changelog #30
• SixtyFPS (GUI crate) weekly update
• This week in Fluvio #4: the programmable streaming platform
• This week in Datafuse #5
• [Tauri] feature freeze,Community Survey

Observations/Thoughts

• Game engine beginner - First look at Bevy - What is ECS and why should you care?
• An Alternative Syntax for Async Functions
• Development Cost of 将 TensorFlow 模型，移植到纯粹的 Rust 代码

Rust Walkthroughs

• Rust Option and Result
• Asynchronous Rust: basic concepts
• Rust Visualized: Pointers as References
• Password auth in Rust, from scratch - Attacks and best practices
• Building an LC-3 virtual machine in Rust
• Combining Axum, Hyper, Tonic, and Tower for hybrid web/gRPC apps: Part 1
• [video] getting started with rust programming language 🦀 2021: 5. refactoring the cli app in rust
• [video] crust of rust: async/await
• [video] concurrency in rust - sharing state

Miscellaneous

• Struct Update Syntax in Rust
• htsget-rs: Bioinformatic file formats accessible to the web, 100% Rust, a GSoC2021 project wrap-up
• cold_iron: A Brief Introduction to Nanothaumaturgy

Crate of the Week

本周的箱子是cargo-llvm-cov，用于基于 LLVM 的代码，覆盖率的 cargo 子命令。

谢谢Jacob Pratt的建议。

Please 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来自 Rust 社区的一些任务，供您挑选并开始使用！

• cdrs-tokio road to performance and testing
• RoaringBitmap/roaring-rs - The insert_range method does not properly handle boundary condition
• ockam-network/ockam - Ockam Vault for AWS (KMS/HSM) in Rust
• ockam-network/ockam - Ockam TCP Transport using smoltcp

其中一些任务可能还有可用的导师，请访问任务页面了解更多信息。

如果您是 Rust 项目所有者并且正在寻找贡献者，请提交任务here.

Updates from Rust Core

296 个拉取请求是merged in the last week

• fix debugger stepping behavior with match expressions
• improve liveness analysis for generators
• handle match statements with non exhaustive variants in closures
• ast_lowering: introduce lower_span for catching all spans entering HIR
• PGO for LLVM builds on x86_64-unknown-linux-gnu in CI
• Cow‘ify some pprust methods
• polonius: move to a fully hand-written parser to improve compile / iteration times
• warn about unreachable code following an expression with an uninhabited type
• normalize projections under binders
• stabilize and document --force-warn
• stabilise BufWriter::into_parts
• add Cell::as_array_of_cells
• add Saturating type (based on Wrapping type)
• stdarch: update codegen for simd wasm intrinsics with LLVM 13
• futures: add Peekable::{peek_mut, poll_peek_mut}
• cargo: show description of well known subcommands (fmt, clippy) in cargo --list
• clippy: fix option_if_let_else
• clippy: add module_style lint to style
• clippy: don’t report function calls as unnecessary operation if used in array index

Rust Compiler Performance Triage

非常忙碌的一周，退步和改进的数量相对均匀（尽管，改进超过了退步）。最大的胜利是在 x86_64 linux builds 上，使用了配置文件引导优化（profile-guided optimization） (PGO) ，这为现实世界的 crate 带来了相当大的改进。有 2 个退步（~3.5%）需要调查的，导致实际 crate 相当大的退步。

分流完成 @rylev.修订范围：33fdb..fe379

5 个退步，4 个改进，5 个混合；其中 0 个在汇总中 总共进行了 56 次比较

Full report here.

Approved RFCs

Rust 的变化遵循 RustRFC (request for comments) process.这些是本周批准实施的 RFC：

本周没有 RFC 获得批准。

Final Comment Period

每周the team宣布正在达成决定的 RFC 和关键 PR 的“最终评论期”。现在就发表你的意见。

[Tracking Issues & PRs](https://github.com/rust-lang/rust/labels/f

RFCs

• [disposition: close] Proposal: Else clauses for for and while loops
• [disposition: close] RFC: let-expression
• [disposition: merge] Scrape code examples from examples/ directory for Rustdoc
• [disposition: merge] Rust-lang crate ownership policy

Tracking Issues & PRs

• [disposition: merge] Partially stabilize array_methods
• [disposition: merge] Stabilize std::os::unix::fs::chroot
• [disposition: merge] Stabilize reserved prefixes
• [disposition: merge] stabilize disjoint capture in closures (RFC 2229)
• [disposition: merge] Stabilize try_reserve
• [disposition: merge] Support #[track_caller] on closures and generators

Quote of the Week

总之，当标准库文档说：“去看看 nomicon 吧 ” 然后 nomicon 说：“这里是有一些建议，但最终版本，我们是不知道的，也许可以看看 UCG ” 然后 UCG（ Unsafe Code Guidelines） 说：“最终版本，我们不知道它可能是怎样的，因为还没有 RFC”
然后 Ralf（rust 研究员/发起者） 说：“如果布局匹配，可能会有吧”。

– Lokathor on the Rust Zulip

Thanks to Riccardo D’Ambrosio 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

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