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dart / sdk / 53ba44ff00a497a6dc09c210a69a8094fd556804
commit53ba44ff00a497a6dc09c210a69a8094fd556804[log] [tgz]
authorPaul Berry <paulberry@google.com>Wed Aug 06 11:20:25 2025 -0700
committerCommit Queue <dart-scoped@luci-project-accounts.iam.gserviceaccount.com>Wed Aug 06 11:20:25 2025 -0700
treea2c84298565c137836719902e07b9b2450758c41
parent333460ead410f2b57d3d59639bfa7585bf554c57 [diff]
[analyzer] Improve dead code highlighting for null-aware expressions

Previously, when a null-aware property access, method invocation, or
index invocation was performed on a variable that was definitely
unassigned, the entire expression was highlighted as dead code.

This change modifies the `DeadCodeVerifier` to highlight only from the
null-aware operator (`?.`, `?[]`, etc.) to the end of the expression.
This provides a more precise and helpful diagnostic by highlighting
the exact portion of the code that can be safely removed.

Fixes https://github.com/dart-lang/sdk/issues/61251.

Bug: https://github.com/dart-lang/sdk/issues/61251
Change-Id: I4792b84d16a797f70b752a20e6affa69f3fe3d8c
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/444040
Reviewed-by: Konstantin Shcheglov <scheglov@google.com>
Commit-Queue: Paul Berry <paulberry@google.com>
2 files changed
tree: a2c84298565c137836719902e07b9b2450758c41
  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.