[beta] Roll dart_style 3.1.0 into SDK. Issue description: This brings the 3.1.0 dart_style into the SDK. It has a number of requested style fixes since 3.7 and adds support for the 3.8 language version, including support for null-aware elements. Why cherry-pick: We want as much experience with the new style on beta before shipping as possible. Also, this is needed to be able to format 3.8 code using null-aware elements. Risk: Moderate. It's just a DEPS change so the cherrypick itself is simple, but the style changes are significant. To mitigate risk, the new style only applies to code at language version 3.8 or higher. I've tested the new formatter by running it on a huge corpus of pub packages. Cherry-pick: https://dart-review.googlesource.com/c/sdk/+/419990 Change-Id: I60d2d97a4c54185e33acbe57cf217178c5433e3d Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/422022 Reviewed-by: Alexander Thomas <athom@google.com> Reviewed-by: Nate Bosch <nbosch@google.com> Commit-Queue: Bob Nystrom <rnystrom@google.com> Auto-Submit: Bob Nystrom <rnystrom@google.com>
Dart is:
Approachable: Develop with a strongly typed programming language that is consistent, concise, and offers modern language features like null safety and patterns.
Portable: Compile to ARM, x64, or RISC-V machine code for mobile, desktop, and backend. Compile to JavaScript or WebAssembly for the web.
Productive: Make changes iteratively: use hot reload to see the result instantly in your running app. Diagnose app issues using DevTools.
Dart's flexible compiler technology lets you run Dart code in different ways, depending on your target platform and goals:
Dart Native: For programs targeting devices (mobile, desktop, server, and more), Dart Native includes both a Dart VM with JIT (just-in-time) compilation and an AOT (ahead-of-time) compiler for producing machine code.
Dart Web: For programs targeting the web, Dart Web includes both a development time compiler (dartdevc) and a production time compiler (dart2js).
Dart is free and open source.
See LICENSE and PATENT_GRANT.
Visit dart.dev to learn more about the language, tools, and to find codelabs.
Browse pub.dev for more packages and libraries contributed by the community and the Dart team.
Our API reference documentation is published at api.dart.dev, based on the stable release. (We also publish docs from our beta and dev channels, as well as from the primary development branch).
If you want to build Dart yourself, here is a guide to getting the source, preparing your machine to build the SDK, and building.
There are more documents in our repo at docs.
The easiest way to contribute to Dart is to file issues.
You can also contribute patches, as described in Contributing.
Future plans for Dart are included in the combined Dart and Flutter roadmap on the Flutter wiki.