Rust周报 398(译)

• this-week-in-rust
• 日期：2021-07-07
• 原文：398 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

Updates from Rust Community

Official

• [Inside] what the error handling project group is working towards

Project/Tooling Updates

• Linux Rust Support Patches
• Intellij Rust Changelog #150
• Rust Analyzer Changelog #84
• GCC Rust Monthly Report #7 June 2021
• The future of Buck
• ChainSafe’s Rust implementation of Mina spec Community Spotlight (video)
• MoonZoon Dev News (5): Chat example, MoonZoon Cloud
• Fluvio: The Programmable Data Platform
• butido - a Linux Package Building Tool in Rust
• Knurling-rs changelog #28
• fcp 0.2.0 released - A significantly faster alternative to cp
• Announcing Sycamore v0.5.0 - SSR + Routing
• This Week In TensorBase 10

Observations/Thoughts

• 用 Rust 浏览一遍 “The Java Tutorials” - ‘What Is an Interface?’ and specialization
• Rust and Tinyverse
• 用 Rust + WebAssembly 加速 Webcola Graph Viz Library
• Rust closures: How a closure can implement more than one trait

Rust Walkthroughs

• Rust 前端
• Deploy a Rust Web App With Rocket
• 30行 Rust，一个 TCP 代理
• Manage WebAssembly Apps in WasmEdge Using Docker Tools
• Rust 概念大揭秘: Deref vs AsRef vs Borrow vs Cow
• Thread safety and Learning in Rust
• REST API Wrapper with Rust
• [video] Building a Web Application with Rust - Part VII - Auth Middleware
• [video] Building a Web Application with Rust - Part VIII - Containerization
• [video] Rust & Bevy Tutorial - Building a Game From Scratch (Part 1)
• [video] Creating a Chat Server with async Rust and Tokio
• [video] 1Password Developer Fireside Chat: Dive into Async & Futures in Rust

Miscellaneous

Crate of the Week

本周的箱子是css-inline，一个将 CSS 内联到style标签的箱子。

谢谢Dmitry Dygalo的建议。

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！

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。

Synth

• Feature: Scheduler / Topological sorting namespaces
• Use parameterized Statements for Postgres export
• Feature: Doc template generator
• XML export / import
• Feature: CSV import/export

Sycamore

• Sycamore has some good first issues

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

297 个拉取请求是merged in the last week

• make ForceWarn a lint level
• change vtable memory representation to use tcx allocated allocations
• support allocation failures when interpreting MIR
• avoid byte to char position conversions in is_multiline
• fix pretty print for loop
• pretty-print macro matchers instead of using source code
• fix ICE when main is declared in an extern block
• ignore inference variables in certain queries
• check the number of generic lifetime and const parameters of intrinsics
• check node kind to avoid ICE in check_expr_return()
• deny using default function in impl const Trait
• fix garbled suggestion for missing lifetime specifier
• fix misleading “impl Trait” error
• alloc: no_global_oom_handling: disable new()s, pin()s, etc.
• add linked list cursor end methods
• stabilize str::from_utf8_unchecked as const
• stabilize string_drain_as_str
• stabilize Bound::cloned()
• stabilize Seek::rewind()
• when using process::Command on Windows, environment variable names must be case-preserving but case-insensitive
• add track_path::path fn for usage in proc_macros
• libm: optimize round and roundf
• cargo: adjust error message with offline and frozen
• clippy: stabilize cargo clippy --fix
• clippy: downgrade nonstandard_macro_braces to nursery
• clippy: don’t suggest doc(hidden) or unstable variants in wildcard lint
• clippy: fix emitting in nested (proc_)macros for nonstandard_macro_braces lint
• clippy: fix doc_markdown false positive
• clippy: new lint: rc_mutex
• clippy: new lint: strlen_on_c_strings
• clippy: new lint: disallowed_script_idents

Rust Compiler Performance Triage

一个相当复杂的一周，改进和退步大多相互抵消。本周的亮点是我们现在开始采用新的性能分类流程，该流程将对引起性能退步的 PR 标记为perf-regression标签。作者 and/or 审阅者应该通过简短总结，为什么尽管退步仍然值得更改，或者通过创建一个问题来跟进退步，从而证明他们的性能退步是合理的。

从长远来看，我们希望这个过程能够带来更好的编译器性能。

分流完成 @rylev .修订范围：5a78340..9a27044

2 个退步，3 个改进，2 个混合。1 个在汇总中

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。

RFCs

• [disposition: merge] RFC: let-else statements
• [disposition: merge] RFC: I/O Safety
• [disposition: merge] #[derive(Default)] on enums with a #[default] attribute

Tracking Issues & PRs

• [disposition: merge] Stabilize const_fn_transmute, const_fn_union
• [disposition: merge] Stabilize bindings_after_at
• [disposition: close] Add expr202x macro pattern
• [disposition: merge] Stabilize impl From<[(K, V); N]> for HashMap (and friends)
• [disposition: merge] Stabilize “RangeFrom” patterns in 1.55
• [disposition: merge] Remove P: Unpin bound on impl Future for Pin
• [disposition: merge] Tracking Issue for IntoInnerError::into_parts etc. (io_into_inner_error_parts)
• [disposition: merge] Tracking Issue for array_map
• [disposition: merge] Tracking issue for #![feature(maybe_uninit_extra)]

New RFCs

本周没有提出新的 RFC。

Quote of the Week

我喜欢 Rust 的一件事是，它过滤掉了懒惰/马虎的思想者。即使我不同意另一种，但对问题考虑得足够深入，借此通过借用检查器检查的想法，抱有一定程度的尊重。

– Zeroexcuses on rust-users

Thanks to Jonah for the self-suggestion!

Please submit quotes and vote for next week!

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

Discuss on r/rust