Create an abstract layer to customize querying element types. This will be needed for the NNBD migration engine. Currently only used in checker.dart. Later CLs will convert the resolver to use this abstraction layer as well. The runtime overhead of this abstraction should be negligible, since under normal analyzer operation, there will only be a single const instance of this class, and no instances of any subclasses. So the VM should be able to trivially inline all uses of the abstraction layer. Change-Id: I0132b76238606e6e6b789169a62806d09f10f71d Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/127490 Commit-Queue: Paul Berry <paulberry@google.com> Reviewed-by: Brian Wilkerson <brianwilkerson@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 has 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 the dart.dev to learn more about the language, tools, getting started, and more.
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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.