Alexander Markov
da4ff4e9a6
Previously, annotations were not traced by global type flow analysis (in order to avoid retaining classes which are only used in annotations). Annotations were only traced during tree shaking and references from such constants were treated much like references from types. This handling of constants in annotations conflicts with removal of fields, as tree shaker needs to know which fields are retained upfront to be independent of the visiting order. In a certain corner case (field was replaced with a getter but was still used in a constant in annotation) that caused incorrect AST and crash during serialization of AST. In order to fix that, this change adds proper tracing through annotations on members, classes and libraries, as if annotation constants were used in the executable code. That also means that annotation classes will be retained as allocated. In order to compensate for that, a new pass is added before the global analysis to clean all annotations except @ExternalName, @pragma (used by the VM) and @TagNumber (used by protobuf tree shaking). TEST=runtime/tests/vm/dart/regress_45968_test.dart Fixes https://github.com/dart-lang/sdk/issues/45968 Change-Id: I998e4f7ec7da7b74e1738fc21b354a4ec9f0c071 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/199200 Commit-Queue: Alexander Markov <alexmarkov@google.com> Reviewed-by: Vyacheslav Egorov <vegorov@google.com> Reviewed-by: Martin Kustermann <kustermann@google.com>
Dart
A client-optimized language for fast apps on any platform
Dart is:
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Optimized for UI: Develop with a programming language specialized around the needs of user interface creation.
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Productive: Make changes iteratively: use hot reload to see the result instantly in your running app.
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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:
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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.
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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 on our wiki.
Contributing to Dart
The easiest way to contribute to Dart is to file issues.
You can also contribute patches, as described in Contributing.