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dart / sdk / b18efe289159247c6b77f5bc64153127a6332f3f
commitb18efe289159247c6b77f5bc64153127a6332f3f[log] [tgz]
authorNicholas Shahan <nshahan@google.com>Fri May 05 21:13:40 2023 +0000
committerCommit Queue <dart-scoped@luci-project-accounts.iam.gserviceaccount.com>Fri May 05 21:13:40 2023 +0000
treea4c9019fa43f9dc2fbbea618924e0a2deb3c2af1
parentdd2fb672fd562e047ac5a7fe9092f6381d2b2422 [diff]
[ddc] Update type parameter representations

Previously type tests involving type parameter types would
be replaced with native primitive tests when the type parameter
was bounded by a type with a native representation. This isn't
always correct because the type parameter can always be inhabited
by the bottom type at runtime. So code like `x is T` would be true
when `T` is instantiated as `Never` and `x` is any primitive value
like a number, string, or bool.

This change removes the incorrect optimization that allowed type
parameters to be replaced with their bound when that bound was
represented by a native type when performing an `is` operation.

Fixes: https://github.com/dart-lang/sdk/issues/52243
Change-Id: I57cebef7bb533d71831ef84415b3d91369758476
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/300820
Commit-Queue: Nicholas Shahan <nshahan@google.com>
Reviewed-by: Anna Gringauze <annagrin@google.com>
1 file changed
tree: a4c9019fa43f9dc2fbbea618924e0a2deb3c2af1
  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.