The impl period newsletter #4

aturon · November 28, 2017, 9:21pm

The impl period

We’re just past the 2/3rds marker on the impl period, and still going strong!

The “impl period” consists of 37 working groups, all helping push our 2017 roadmap to completion. There’s a global Gitter channel (with IRC bridge), and dedicated channels for each working group.

This effort is intended for people with all experience levels and interests — there really is something for everyone, and the WG leads are putting a ton of work into mentoring. If you’re not sure what working group is right for you, drop by the main chatroom and introduce yourself, and we’ll help you find your way!

Highlights

Thanks to @chrisvittal, impl Trait in argument position is now available in nightly builds!
- https://play.rust-lang.org/?gist=b1f75f7b195129f169fde6c0a32e7a97&version=nightly
Thanks to @petrochenkov, ::crate::foo paths is now landed on master. Coming to a nightly near you!
The work on non-lexical lifetimes and the MIR borrowck work continues apace. We are slowly burning down the bugs on our milestone and approaching feature and diagnostic parity with the existing borrow checker. Thanks to @vramana, @zilbuz, @KiChjang, @mikhail-m1, @zackmdavis, @Nashenas88, @spastorino, and @davidtwco for their continued efforts and PRs.
Performance monitoring will be ready to take in the benchmarks posted to the internals post. A re-implementation of the backend and redesign of the frontend in the future branch of rustc-perf which allows for easier benchmark additions and implements a better UI for interpreting collected data is nearly complete, and is in the bugfix stage. Expect a request for community help in this area in the next couple weeks!
Thanks to @QuietMisdreavus, rustdoc on nightly can now load in external files for documentation!
New rustdoc grew support for alternative frontends, moved from error-chain to failure, and moved the testing framework to JMESPath.

Where help is most needed

Compiler

Issue 45385: permit foo.rs or foo/mod.rs to support submodules like foo/bar.rs
- has mentoring instructions!
- haven’t heard from existing person in some time, presumably they got busy

Rand crate

rand-core
- Hash functions for use in deterministically seeding PRNGs
rand
- Small, fast PRNGs
- “Crypto” PRNGs

rayon

Help document the rayon crate! See the [1.0](https://github.com/rayon-rs/rayon/milestone/1) release milestone for more details

semver-parser

Support parsing range sets

Shoutouts

Compiler teams

@cramertj put up a PR enabling in-band lifetimes — not yet landed.
@sunjay continues to push on generic associated types.
@gaurikholkar is working on helpful lints related to the new in-band lifetimes.
@qmx continues to learn the intricacies of the HIR in an effort to enable elision in impl headers.
@bkchr has been working on enabling the use of [?](https://github.com/rust-lang/rust/issues/43301) in main.

Rand crate

@pitdicker for a huge amount of help on design, review, algorithms and optimisations
@burdges for lots of iterator-wrangled designs and other code trickery
@newpavlov for crypto/hash insights and reviews

rust-cookbook Covers 29.10.2017 - 24.11.2017.

Incremental Compilation

We’ve seen many improvements to the test suite from @gaurikholkar (#45941, #45987), @CrockAgile (#45951), and @fitzgen (#45950).
@wesleywiser has been collecting information about what typical dependency graphs look like (with some surprising results) and is exploring ways of using this information to optimize our dependency tracking implementation.
@michaelwoerister has implemented a first version of “query result caching” with more to come as soon as the known ICEs are fixed.

Cargo

@cswindle implemented storing tokens for different registries and being able specify a --registry argument with cargo login, cargo owner, cargo publish, cargo search, and cargo yank! (rust-lang/cargo#4680)
@cswindle implemented rules around which registries a crate may be published to based on its Cargo.toml and the registry’s settings for allowable registries for dependencies! (rust-lang/cargo#4568)

Docs

@GuillaumeGomez landed several improvements to rustdoc search! (#45055, #45673)
@GuillaumeGomez updated the “Pulldown rendering difference” warnings to be displayed even when using the default Hoedown markdown renderer (#45324)
@QuietMisdreavus let rustdoc show when the type returned by a function implements Iterator, Read, or Write (#45039)
@QuietMisdreavus added an option to let rustdoc print the crate version into the docs, and turned it on for the standard library docs (#44989)
@fhartwig hid methods that took self by-value from method listings printed via Deref (#45645)
@federicomenaquintero landed several updates to fmt's docs, helping close its Standard Library Docs Checklist item! (#44855)

libz blitz Covers 01.11.2017 - 24.11.2017. flate2-rs

mio

memmap-rs

@sfackler Inline deref codepath methods

rayon

lazy-static.rs

log

@GuillaumeGomez fix doc warnings

num_cpus

@GabrielMajeri Change fallback to fall back

env_logger

semver

semver-parser

`bindgen`

Crater

@colinbankier Implemented a feature request to improving QoL for crater run reviewers - https://github.com/rust-lang-nursery/crater/pull/152.

RLS

Closed impl period issues so far

VSCode

Closed impl period issues so far

rustfmt

Closed impl period issues so far

leonardo · November 28, 2017, 10:18pm

Perhaps this landed.

aturon · March 25, 2019, 8:29am

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