Add `interface` to a few classes which had missed it. Breaking change request: https://dartbug.com/52334 Four abstract pure-interface classes in `stream.dart` have been missed, and not made into `interface` declarations like other similar abstract interface-only classes. They should be marked `interface`, for consistency, and to express intent. The classes are: * `StreamConsumer` * `StreamIterator` * `StreamTransformer` * `MultiStreamController` All are abstract classes with only abstract instance members. Only `StreamConsumer` has uses where it is extended. Most of those are inside the SDK, and are fixed here. Two more are in packages (`http_server` and `streams`). The former is discontinued and archived, and will never have a 3.0 release. The latter is internally developed and easy to fix. Hope to cherry pick this for 3.0.3 Tested: Modified affected tests. Only adding restrictions. CoreLibraryReviewExempt: Adding modifiers only. Change-Id: I41aa47e48eaf769b7bd9d3206c1079a16ef3d476 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/302204 Reviewed-by: Nate Bosch <nbosch@google.com> Commit-Queue: Lasse Nielsen <lrn@google.com>
Dart is:
Optimized for UI: Develop with a programming language specialized around the needs of user interface creation.
Productive: Make changes iteratively: use hot reload to see the result instantly in your running app.
Fast on all platforms: Compile to ARM & x64 machine code for mobile, desktop, and backend. Or compile to JavaScript for the web.
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 on our wiki.
The easiest way to contribute to Dart is to file issues.
You can also contribute patches, as described in Contributing.