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dart / sdk.git / bb6cab29b9e78eedbd6a3e03cad6c55f807d0cd8
commitbb6cab29b9e78eedbd6a3e03cad6c55f807d0cd8[log] [tgz]
authorKonstantin Shcheglov <scheglov@google.com>Fri Jan 31 19:35:23 2020 +0000
committercommit-bot@chromium.org <commit-bot@chromium.org>Fri Jan 31 19:35:23 2020 +0000
treedba4c76cd3de54c02aad261411ae303e4d0b670f
parentf07c805656cbfd0d37974ec64a439a1052ad3ab6 [diff]
Check for correct overrides as the specification requires.

Specifically, we replace types of covariant parameters with `Object?`
or `Object` and use subtype check. Then we check types of covariant
formal parameters and corresponding overridden formal parameters.

It looks that NNBD related changes that are coming now require
such more precise following to the specification rules.

Change-Id: Idfa4e3a118050a1be79acce8c708b3aac07b5051
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/134043
Commit-Queue: Konstantin Shcheglov <scheglov@google.com>
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
3 files changed
tree: dba4c76cd3de54c02aad261411ae303e4d0b670f
  1. .github/
  2. benchmarks/
  3. build/
  4. client/
  5. docs/
  6. pkg/
  7. runtime/
  8. samples/
  9. samples-dev/
  10. sdk/
  11. sdk_nnbd/
  12. tests/
  13. third_party/
  14. tools/
  15. utils/
  16. .clang-format
  17. .gitattributes
  18. .gitconfig
  19. .gitignore
  20. .gn
  21. .mailmap
  22. .packages
  23. .style.yapf
  24. .vpython
  25. AUTHORS
  26. BUILD.gn
  27. CHANGELOG.md
  28. codereview.settings
  29. CONTRIBUTING.md
  30. DEPS
  31. LICENSE
  32. PATENT_GRANT
  33. PRESUBMIT.py
  34. README.dart-sdk
  35. README.md
  36. sdk_args.gni
  37. 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 has 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 the dart.dev to learn more about the language, tools, getting started, and more.

Browse pub.dev for more packages and libraries contributed by the community and the Dart team.

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.