| commit | 0bb3adb704d1278f740e76622888bbd6e0ca9653 | [log] [tgz] |
|---|---|---|
| author | Stephen Adams <sra@google.com> | Mon Apr 07 12:49:04 2025 -0700 |
| committer | Commit Queue <dart-scoped@luci-project-accounts.iam.gserviceaccount.com> | Mon Apr 07 12:49:04 2025 -0700 |
| tree | 2a1ee56b8282f1a0adb3ae4a64a94f5bef6e2bf7 | |
| parent | 156802777dd2f374c9c3f0d890718c1629d65b87 [diff] |
[dart2js] Remove receiver-not-null strengthening Adding the inference that, after `x.foo()`, `x` cannot be null used to make sense, but with sound null safety means this is only applicable when `x` is `dynamic`. Removing the `knownType` update logic makes it easier to reason about type propagation. There are very few regressions for removing this now (huge app had half a dozen minor regressions, several other apps had none). If we decide to add something like this in the future, I think it should be added as part of SsaTypeConversionInserter, and be extended to add other post-conditions (e.g. the runtime helper `checkString(s)` ensures `s` is a String). Change-Id: I27a7fcbc13873867713c439c062ecf9bd71d644d Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/420504 Commit-Queue: Stephen Adams <sra@google.com> Reviewed-by: Mayank Patke <fishythefish@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.