Nate Biggs
3d2d6492c1
Call sites targeting a procedure annotated with `external-effect` will not produce any code, including the argument which will not be evaluated. However, the single parameter will be treated as 'live' for the purposes of any global analysis the backends do. This is useful for things like protobuf shaking where a user may want to retain certain protobuf messages without actually emitting the code that retains those messages. Today this functionality is available internally in the vm and wasm SDK libraries. dart2js has similar functionality represented via the opaqueTrue and opaqueFalse booleans (which will cause conditional branches to get shaken after analysis). This will replace dart2js's opaque(True/False). This also adds validation to the frontend to ensure a method annotated with 'external-effect' is well-formed. Change-Id: If1c4096673e655c58fe7638840a16125003e7809 Tested: Backend tests for codegen were added. A frontend test was added for the validation. A language test was added to confirm the behavior. Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/476020 Reviewed-by: Alexander Markov <alexmarkov@google.com> Commit-Queue: Nate Biggs <natebiggs@google.com>
Dart
An approachable, portable, and productive language for high-quality apps on any platform
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).
License & patents
Dart is free and open source.
See LICENSE and PATENT_GRANT.
Using Dart
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).
Building Dart
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.
Contributing to Dart
The easiest way to contribute to Dart is to file issues.
You can also contribute patches, as described in Contributing.
Roadmap
Future plans for Dart are included in the combined Dart and Flutter roadmap on the Flutter wiki.