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chromium / external / github.com / dart-lang / sdk / febdd14b3d02817dc8cf3ea4f832184c6629f91c
commitfebdd14b3d02817dc8cf3ea4f832184c6629f91c[log] [tgz]
authorKallen Tu <kallentu@google.com>Wed Dec 27 18:19:10 2023
committerCommit Queue <dart-scoped@luci-project-accounts.iam.gserviceaccount.com>Wed Dec 27 18:19:10 2023
tree3c3fc8d38bd4b27b3c141d99c9d09108c33bc8e2
parentc0a56e19f3556606cf662937a4b9158831ae1b8f [diff]
[ddc] Add type parameter variance to ddc canary.

Updated the ddc canary implementation to handle variance subtyping.

Variance subtyping is currently broken on DDC. This CL emits a runtime call to `addTypeParameterVariances` from `rti.dart` to annotate the type parameter variances of each interface that's appeared in type recipes. The rest of the subtyping algorithm already exists from the Dart2JS implementation, so the variance feature should be working correctly now in DDC with these changes and after the switch to canary by default.

Existing tests now pass: language/variance/variance_in_subtyping_test, language/variance/variance_inout_subtyping_test

Fixes https://github.com/dart-lang/sdk/issues/54367

Change-Id: I8483570184de61f2a6d365f89446720ef2349608
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/338651
Reviewed-by: Nate Bosch <nbosch@google.com>
Commit-Queue: Kallen Tu <kallentu@google.com>
Reviewed-by: Nicholas Shahan <nshahan@google.com>
2 files changed
tree: 3c3fc8d38bd4b27b3c141d99c9d09108c33bc8e2
  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

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 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.