Crate of the week: typetag

This week's crate is typetag, a small crate to allow for serde trait objects. Thanks to Christopher Durham for the suggestion!

This week in Rust #272 — 05 feb 2019

https://this-week-in-rust.org/blog/2019/02/05/this-week-in-rust-272/

Updates from core

HirIdification: add key HirId methods
https://github.com/rust-lang/rust/pull/58090

don't panic when accessing enum variant ctor using Self in match
https://github.com/rust-lang/rust/pull/58007

use LLVM intrinsics for saturating add/sub
https://github.com/rust-lang/rust/pull/58003

add MOVBE x86 CPU feature
https://github.com/rust-lang/rust/pull/57999

NVPTX target specification
https://github.com/rust-lang/rust/pull/57937

fix bug in integer range matching
https://github.com/rust-lang/rust/pull/57978

unused variable suggestions apply on all patterns
https://github.com/rust-lang/rust/pull/57899

add information to higher-ranked lifetimes conflicts error messages
https://github.com/rust-lang/rust/pull/57901

rustc: use multiple threads by default
https://github.com/rust-lang/rust/pull/57948

misc performance tweaks
https://github.com/rust-lang/rust/pull/57916

simplify ConstValue::ScalarPair
https://github.com/rust-lang/rust/pull/57442

mark str::trim* functions as #[must_use]
https://github.com/rust-lang/rust/pull/57106

override VecDeque's Iter::try_fold
https://github.com/rust-lang/rust/pull/57974

introduce into_raw_non_null on Rc and Arc
https://github.com/rust-lang/rust/pull/57934

implement Weak::{strong_count, weak_count}
https://github.com/rust-lang/rust/pull/56696

rename iter::unfold to iter::from_fn and remove explicit state
https://github.com/rust-lang/rust/pull/58062

stabilize std::error::Error::type_id
https://github.com/rust-lang/rust/pull/58048

stabilize split_ascii_whitespace
https://github.com/rust-lang/rust/pull/58047

cargo: fix overlapping progress with stdout
https://github.com/rust-lang/cargo/pull/6618

cargo: improve progress bar flickering
https://github.com/rust-lang/cargo/pull/6615

News

Cargo's next few years.
https://www.ncameron.org/blog/cargos-next-few-years/

The steps towards rustc, the great optimiser.
https://kazlauskas.me/entries/the-road-to-bestest-optimiser.html

Salsa: Incremental recompilation.
http://smallcultfollowing.com/babysteps/blog/2019/01/29/salsa-incremental-recompilation/

Collection of Rust hacks.
https://vorner.github.io/2019/02/03/hacks.html

Writing Neovim plugins in Rust.
https://medium.com/@srishanbhattarai/a-detailed-guide-to-writing-your-first-neovim-plugin-in-rust-a81604c606b1

osaka.rs - rust async without the noise.
https://aep.github.io/rust-async-without-the-noise/

Rust on iOS (and Android).
https://medium.com/visly/rust-on-ios-39f799b3c1dd

Rust: regretless concurrency.
https://medium.com/@polyglot_factotum/rust-regret-less-concurrency-2238b9e53333

Learning Rust via Advent of Code.
https://www.forrestthewoods.com/blog/learning-rust-via-advent-of-code/

Creating web-server .deb binary with rust.
https://gill.net.in/posts/creating-web-server-deb-binary-with-rust/

An introduction to the Rust programming language for Node developers.
https://twitter.com/PipoPeperoni/status/1092842843637456899

Crate of the week: log-derive

This week's crate is log-derive, a procedural macro to log function outputs. Thanks to elichai2 for the suggestion!

This week in Rust #273 — 12 feb 2019

https://this-week-in-rust.org/blog/2019/02/12/this-week-in-rust-273/

Updates from core

Initial addition of the Embedded Rust Book.
https://github.com/rust-lang/rust/pull/56291

Add const generics to the AST.
https://github.com/rust-lang/rust/pull/58191

Error on duplicate matcher bindings.
https://github.com/rust-lang/rust/pull/57617

libc: RFC 2235 - Implement PartialEq,Eq,Hash,Debug for all types.
https://github.com/rust-lang/libc/pull/1217

Lower constant patterns with ascribed types.
https://github.com/rust-lang/rust/pull/58161

Make intern_lazy_const actually intern its argument.
https://github.com/rust-lang/rust/pull/58207

Avoid committing to autoderef in object method probing.
https://github.com/rust-lang/rust/pull/57885

Add #[must_use] to core::task::Poll.
https://github.com/rust-lang/rust/pull/58145

Add #[must_use] message to Fn* traits.
https://github.com/rust-lang/rust/pull/58262

Avoid some bounds checks in binary_heap::{PeekMut,Hole}.
https://github.com/rust-lang/rust/pull/58123

Make -Zdump-mir dump shims.
https://github.com/rust-lang/rust/pull/58103

Cargo: Bail when trying to run "test --doc --no-run".
https://github.com/rust-lang/cargo/pull/6628

Improve error message and docs for non-UTF-8 bytes in stdio on Windows.
https://github.com/rust-lang/rust/pull/58136

Move privacy checking later in the pipeline and make some passes run in parallel.
https://github.com/rust-lang/rust/pull/58010

Overhaul syntax::fold::Folder.
https://github.com/rust-lang/rust/pull/58061

Factor out error reporting from smart_resolve_path_fragment fn.
https://github.com/rust-lang/rust/pull/58065

Do not ICE in codegen when using a extern_type static.
https://github.com/rust-lang/rust/pull/58192

hir: add more HirId methods.
https://github.com/rust-lang/rust/pull/58139

Implement more detailed self profiling.
https://github.com/rust-lang/rust/pull/58085

Add a forever unstable opt-out of const qualification checks.
https://github.com/rust-lang/rust/pull/56123

Initial implementation of rustfixable unused_imports lint.
https://github.com/rust-lang/rust/pull/56645

Add a query type which is always marked as red if it runs.
https://github.com/rust-lang/rust/pull/57770

Don't try to clean predicates involving ReErased.
https://github.com/rust-lang/rust/pull/57851

Deduplicate mismatched delimiter errors.
https://github.com/rust-lang/rust/pull/57944

Add suggestion for duplicated import.
https://github.com/rust-lang/rust/pull/57973

Allow #[repr(align(x))] on enums.
https://github.com/rust-lang/rust/pull/57998

News

Learning Rust in 2019.
https://www.ragona.com/posts/learning_rust_2019

A quick look at trait objects in Rust.
https://tratt.net/laurie/blog/entries/a_quick_look_at_trait_objects_in_rust.html

Allocations in Rust: An introduction to the memory model.
https://speice.io/2019/02/understanding-allocations-in-rust.html

Custom exit status codes with ? in main.
https://www.joshmcguigan.com/blog/custom-exit-status-codes-rust/

Rust: a unique perspective.
https://limpet.net/mbrubeck/2019/02/07/rust-a-unique-perspective.html

Rust on STM32: Blinking an LED.
https://jonathanklimt.de/electrics/programming/rust-STM32F103-blink/

Generators I: Toward a minimum viable product.
https://boats.gitlab.io/blog/post/generators-i/

Aturon retires from the Core Team (but not from Rust).
https://internals.rust-lang.org/t/aturon-retires-from-the-core-team-but-not-from-rust/9392

Rewriting stackcollapse-xdebug in Rust.
https://daniellockyer.com/rewriting-stackcollapse-xdebug/

Are you still using 'println' in Rust for debugging?
https://blog.knoldus.com/are-you-still-using-println-in-rust-for-debugging/

UCG+Miri All-Hands 2019 Recap.
https://www.ralfj.de/blog/2019/02/12/all-hands-recap.html

Crate of the week: sysinfo

This week's crate is sysinfo, a system handler to get information and interact with processes. Thanks to GuillaumeGomez for the suggestion!

This week in Rust #274 — 19 feb 2019

https://this-week-in-rust.org/blog/2019/02/19/this-week-in-rust-274/

Updates from core

Implement incremental "fat" LTO
https://github.com/rust-lang/rust/pull/58378

Enable comparing fat pointers
https://github.com/rust-lang/rust/pull/58301

impl iter() for dyn Error
https://github.com/rust-lang/rust/pull/58289

Improve the error messages for missing stability attributes
https://github.com/rust-lang/rust/pull/58276

Cut down on number formating code size
https://github.com/rust-lang/rust/pull/58272

Reduce the size of hir::Expr
https://github.com/rust-lang/rust/pull/58258

Make saturating_add and saturating_sub const functions
https://github.com/rust-lang/rust/pull/58246

Stabilize slice_sort_by_cached_key
https://github.com/rust-lang/rust/pull/58074

Stabilize str::escape_* methods with new return types
https://github.com/rust-lang/rust/pull/58051

Stabilize the time_checked_add feature
https://github.com/rust-lang/rust/pull/58034

Update the future/task API
https://github.com/rust-lang/rust/pull/57992

Speed up the fast path for assert_eq! and assert_ne!
https://github.com/rust-lang/rust/pull/57815

cargo: Stabilize Alternative Registries
https://github.com/rust-lang/cargo/pull/6654

News

Moving from Ruby to Rust.
https://deliveroo.engineering/2019/02/14/moving-from-ruby-to-rust.html

Rust lifetime visualization ideas.
https://blog.adamant-lang.org/2019/rust-lifetime-visualization-ideas/

Generators II: The question mark problem.
https://boats.gitlab.io/blog/post/generators-ii/

A list of itch.io games written in Rust.
https://itch.io/c/449652/rustlang-games

Cross-compiling Rust code to Minix.
https://iandouglasscott.com/2019/02/18/cross-compiling-rust-code-to-minix/

One hundred Rust PRs later.
https://phansch.net/2019/02/18/onehundred-rust-prs/

This week in Rust and WebAssembly 10.
https://rustwasm.github.io/2019/02/13/this-week-in-rust-and-wasm-010.html

Crate of the week: num-format

This week's crate is num-format, a crate to format numbers to international standards. Thanks to Vikrant for the suggestion!

This week in Rust #275 — 26 feb 2019

https://this-week-in-rust.org/blog/2019/02/26/this-week-in-rust-275/

Updates from core

Add an unstable option to build proc macros for both the host and the target
https://github.com/rust-lang/cargo/pull/6547

Avoid ICE when region sneaks into impl trait
https://github.com/rust-lang/rust/pull/58649

Add const generics to the HIR
https://github.com/rust-lang/rust/pull/58503

Improve parsing diagnostic for negative supertrait bounds
https://github.com/rust-lang/rust/pull/57364

Optimise vec![false; N] to zero-alloc
https://github.com/rust-lang/rust/pull/58628

Add expected/provided byte alignments to validation error message
https://github.com/rust-lang/rust/pull/58658

Remove LazyTokenStream
https://github.com/rust-lang/rust/pull/58476

Add better error message for partial move
https://github.com/rust-lang/rust/pull/58199

Suggest removing parentheses surrounding lifetimes
https://github.com/rust-lang/rust/pull/58198

Use normal mutable borrows in matches
https://github.com/rust-lang/rust/pull/57609

Monomorphize less code in fs::{read, write}
https://github.com/rust-lang/rust/pull/58530

Make overflowing and wrapping negation const
https://github.com/rust-lang/rust/pull/58044

Fix overlapping references in BTree
https://github.com/rust-lang/rust/pull/58431

Relax some Ord bounds on BinaryHeap
https://github.com/rust-lang/rust/pull/58421

Relax some Hash bounds on HashMap and HashSet
https://github.com/rust-lang/rust/pull/58370

Turn duration consts into associated consts
https://github.com/rust-lang/rust/pull/58595

RangeInclusive internal iteration performance improvement
https://github.com/rust-lang/rust/pull/58122

Override VecDeque::try_rfold, also update iterator
https://github.com/rust-lang/rust/pull/58064

Stabilize TryFrom and TryInto with a convert::Infallible empty enum
https://github.com/rust-lang/rust/pull/58302

Stabilize iter::successors and iter::from_fn
https://github.com/rust-lang/rust/pull/58576

Destabilize fixed-width const defined atomic integers
https://github.com/rust-lang/rust/pull/58616

Deprecate the unstable Vec::resize_default
https://github.com/rust-lang/rust/pull/57656

Modify doctest's auto-fn main() to allow Results
https://github.com/rust-lang/rust/pull/56470

crates.io: Stop logging the referer header
https://github.com/rust-lang/crates.io/pull/1636

News

Rust case study: Community makes Rust an easy choice for npm.
https://www.rust-lang.org/static/pdfs/Rust-npm-Whitepaper.pdf

Combine results for improved Rust validation logic.
https://www.joshmcguigan.com/blog/multi-try-improved-validation-logic-rust/

Rust now runs on the new Cortex-M33 based Nordic nRF9160 LTE SiP.
https://twitter.com/42Technology/status/1099009843967471617

Scientific computing: a Rust adventure - part 0 - vectors.
https://www.lpalmieri.com/posts/2019-02-23-scientific-computing-a-rust-adventure-part-0-vectors/

HTML code coverage reports for Rust.
https://blog.knoldus.com/bid-adieu-to-tarpaulin-html-reports-are-here-for-rust/

Blockchain in Rust - a video series.
https://www.youtube.com/watch?v=vJdT05zl6jk&list=PLwnSaD6BDfXL0RiKT_5nOIdxTxZWpPtAv&index=2&t=0s

Changes in the core team.
https://blog.rust-lang.org/2019/02/22/Core-team-changes.html

Rust lang team working groups.
http://smallcultfollowing.com/babysteps/blog/2019/02/22/rust-lang-team-working-groups/

This week in Rust and WebAssembly 11.
https://rustwasm.github.io/2019/02/21/this-week-in-rust-and-wasm-011.html

The embedded WG newsletter 15.
https://rust-embedded.github.io/blog/newsletter-15/

Crate of the week: shellfn

This week's crate is shellfn, a proc macro to easily and safely use shell noscripts in Rust. Thanks to Willi Kappler for the suggestion!

This week in Rust #276 — 05 mar 2019

https://this-week-in-rust.org/blog/2019/03/05/this-week-in-rust-276/

Updates from core

Support defining C compatible variadic functions
https://github.com/rust-lang/rust/pull/57760

Fix C-variadic function printing
https://github.com/rust-lang/rust/pull/58865

Add support for using a jobserver with Rayon
https://github.com/rust-lang/rust/pull/56946

Stabilize unrestricted_attribute_tokens
https://github.com/rust-lang/rust/pull/57367

Include bounds from promoted constants in NLL
https://github.com/rust-lang/rust/pull/57202

NLL: Type check operations with pointer types
https://github.com/rust-lang/rust/pull/58673

NLL: Remove LiveVar
https://github.com/rust-lang/rust/pull/58505

Self-Profiler: Make the profiler faster/more efficient
https://github.com/rust-lang/rust/pull/58425

Normalize the type Self resolves to in an impl
https://github.com/rust-lang/rust/pull/58757

Use internal iteration in all methods of Filter and FilterMap
https://github.com/rust-lang/rust/pull/58730

News

🎈🎉 Announcing Rust 1.33.0. 🎉🎈
https://blog.rust-lang.org/2019/02/28/Rust-1.33.0.html

Building fast interpreters in Rust.
https://blog.cloudflare.com/building-fast-interpreters-in-rust/

Implications of rewriting a browser component in Rust.
https://hacks.mozilla.org/2019/02/rewriting-a-browser-component-in-rust/

24 hours of game development in Rust.
http://iolivia.me/posts/24-hours-of-rust-game-dev/

Proposal: New channels for Rust's standard library.
https://stjepang.github.io/2019/03/02/new-channels.html

Async-await status report.
http://smallcultfollowing.com/babysteps/blog/2019/03/01/async-await-status-report/

Up and Running with React + Rust + Wasm.
https://prestonrichey.com/blog/react-rust-wasm/

Exposing FFI from the Rust library.
https://svartalf.info/posts/2019-03-01-exposing-ffi-from-the-rust-library/

Compile time function evaluation using const fn in Rust.
https://blog.knoldus.com/no-more-run-time-enjoy-compile-time-function-evaluation-using-const-fn-in-rust/

This week in Rust and WebAssembly 12.
https://rustwasm.github.io/2019/02/28/this-week-in-rust-and-wasm-012.html

Crate of the week: multi_try

This week's crate is multi_try, a crate to simplify working with multiple results. Thanks to Azriel Hoh for the suggestion!