Reland "Add hints to check the SDK constraints for both set literals and for the ui-as-code features"

This is a reland of 5fdb3c505785457ab0f0c92155e296c570bbea7b

Original change's description:
> Add hints to check the SDK constraints for both set literals and for the ui-as-code features
> 
> Change-Id: I1046e57304d56e6d7f088ea1a8a054318a45ac37
> Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/96837
> Commit-Queue: Brian Wilkerson <brianwilkerson@google.com>
> Reviewed-by: Konstantin Shcheglov <scheglov@google.com>

Change-Id: Ic2fd6d4ad82b6882e20373d224177ea8ebc4685b
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/97121
Reviewed-by: Konstantin Shcheglov <scheglov@google.com>
Reviewed-by: Paul Berry <paulberry@google.com>
Commit-Queue: Brian Wilkerson <brianwilkerson@google.com>
11 files changed
tree: fcbd051d0fb4ad78b0fecec78d5b15c784ef525c
  1. .clang-format
  2. .gitattributes
  3. .gitconfig
  4. .github/
  5. .gitignore
  6. .gn
  7. .mailmap
  8. .packages
  9. .vpython
  10. AUTHORS
  11. BUILD.gn
  12. CHANGELOG.md
  13. CONTRIBUTING.md
  14. DEPS
  15. LICENSE
  16. PATENTS
  17. PRESUBMIT.py
  18. README.dart-sdk
  19. README.md
  20. WATCHLISTS
  21. build/
  22. client/
  23. codereview.settings
  24. docs/
  25. pkg/
  26. runtime/
  27. samples-dev/
  28. samples/
  29. sdk/
  30. tests/
  31. third_party/
  32. tools/
  33. utils/
README.md

Dart

Dart is an open-source, scalable programming language, with robust libraries and runtimes, for building web, server, and mobile apps.

Using Dart

Visit the dartlang.org to learn more about the language, tools, getting started, and more.

Browse pub.dartlang.org 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.

License & patents

See LICENSE and PATENTS.