Revert "Revert "[analyzer] new warning for nullable '==' parameter type""

This reverts commit 885457e1d3a8a1bce76f13d30391bc873e159a91.

[analyzer] new warning for nullable '==' parameter type

This rule checks that a parameter to an `operator ==` implementation has
a non-nullable type.

I intentionally did not enforce, in this rule, that the parameter is
exactly `Object`. It is legal to narrow the parameter type to a
different non-nullable type, like `int`. I can't imagine doing it, but
it seems to be unrelated to whether the type should be nullable or not.

Fixes https://github.com/dart-lang/linter/issues/3441

Replaces https://github.com/dart-lang/linter/pull/3923

Change-Id: Ic0be2bfebaf59b0336e9a3a58e5b7f5359eb8646
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/291042
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
Reviewed-by: Stephen Adams <sra@google.com>
Reviewed-by: Konstantin Shcheglov <scheglov@google.com>
14 files changed
tree: 36bfa96ae024f1fb662f6a2297b70cdcf15f0ea3
  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. README.dart-sdk
  32. README.md
  33. sdk.code-workspace
  34. sdk_args.gni
  35. SECURITY.md
  36. WATCHLISTS
README.md

Dart

A client-optimized language for fast apps on any platform

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 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 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.