Fine. Track hasNonFinalField in manifests and requirements.

Persist and track `hasNonFinalField` for interface-like elements so
fine- grained dependencies can invalidate precisely when a class (or its
supertypes) declares a non-final instance field.

What’s changed
- Store `hasNonFinalField` on manifest items for classes, enums,
  extension types, and mixins. The flag is serialized/deserialized and
  printed in dumps.
- Add a tracked getter on `InterfaceElementImpl` that records a
  dependency when `hasNonFinalField` is queried; use a private backing
  field with a setter.
- Extend requirements schema with an optional `hasNonFinalField` entry
  and record it when requested.
- Validate the requirement via a new
  `InterfaceHasNonFinalFieldMismatch` failure.
- Exclude `hasNonFinalField` from item identity matching; it is enforced
  via requirements instead of forcing new IDs.
- Bump `AnalysisDriver.DATA_VERSION` to 541 for the format change.

Why
- Consumers that depend on mutability of instance fields (directly or
  through inheritance) now get targeted invalidation without unnecessary
  ID churn, improving both correctness and incremental performance.

Implementation notes
- LibraryManifestBuilder copies `element.hasNonFinalField` into item
  instances.
- Manifest read/write gains a boolean field on `InterfaceItem` (and
  subclasses) and helpers to encode/decode optional booleans in the
  requirements stream.
- Result printer includes `hasNonFinalField` in interface requirement
  dumps.

Change-Id: Ib132dca582f77df87f995920dd9b73784a4eeefd
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/448444
Reviewed-by: Johnni Winther <johnniwinther@google.com>
Reviewed-by: Paul Berry <paulberry@google.com>
Commit-Queue: Konstantin Shcheglov <scheglov@google.com>
8 files changed
tree: 15cee85d8b35a5f43e802d3b2c682ffd44f490d9
  1. .dart_tool/
  2. .github/
  3. benchmarks/
  4. build/
  5. docs/
  6. pkg/
  7. runtime/
  8. samples/
  9. sdk/
  10. tests/
  11. third_party/
  12. tools/
  13. utils/
  14. .clang-format
  15. .gitattributes
  16. .gitconfig
  17. .gitignore
  18. .gn
  19. .mailmap
  20. .style.yapf
  21. AUTHORS
  22. BUILD.gn
  23. CHANGELOG.md
  24. codereview.settings
  25. CONTRIBUTING.md
  26. DEPS
  27. LICENSE
  28. OWNERS
  29. PATENT_GRANT
  30. PRESUBMIT.py
  31. pubspec.yaml
  32. README.dart-sdk
  33. README.md
  34. sdk.code-workspace
  35. sdk_args.gni
  36. sdk_packages.yaml
  37. SECURITY.md
  38. WATCHLISTS
README.md

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).

Dart platforms illustration

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.