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

This reverts commit 48ee1f218d9c1934f20b71c36131729325060571.

Reason for revert: https://github.com/flutter/flutter/issues/118632

Original change's description:
> [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: I61d4a7b1ab8318dc9403da1633c352de95bfac61
> Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/277700
> Reviewed-by: Mark Zhou <markzipan@google.com>
> Commit-Queue: Samuel Rawlins <srawlins@google.com>
> Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>

# Not skipping CQ checks because original CL landed > 1 day ago.

Change-Id: I6f96936b8d4e785b5f8e9719751e4b61c2a6ca2a
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/279141
Reviewed-by: Samuel Rawlins <srawlins@google.com>
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
Commit-Queue: Siva Annamalai <asiva@google.com>
Reviewed-by: Mark Zhou <markzipan@google.com>
Reviewed-by: Phil Quitslund <pquitslund@google.com>
14 files changed
tree: 86dc031c7c1e35196057dc8f9f225ffc70f99470
  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. .vpython
  22. AUTHORS
  23. BUILD.gn
  24. CHANGELOG.md
  25. codereview.settings
  26. CONTRIBUTING.md
  27. DEPS
  28. LICENSE
  29. OWNERS
  30. PATENT_GRANT
  31. PRESUBMIT.py
  32. README.dart-sdk
  33. README.md
  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.