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dart / sdk / e2971da5632ceaaec4e7276ac8d4efa753a41aee
commite2971da5632ceaaec4e7276ac8d4efa753a41aee[log] [tgz]
authorAske Simon Christensen <askesc@google.com>Wed Aug 30 08:54:38 2023 +0000
committerCommit Queue <dart-scoped@luci-project-accounts.iam.gserviceaccount.com>Wed Aug 30 08:54:38 2023 +0000
tree5465754820f54a99f96a9b4a1fc98d6745f3feb8
parentadb2be018f3f4e9346ae2c6fe4194c789b74c187 [diff]
[dart2wasm] Consolidate runtime type classes for bottom and top types

This merges the representations for the `Null` and `Never` types into
a single `_BottomType` class and for the `Object`, `Object?`,
`dynamic` and `void` types into a single `_TopType` class.

Since the merged classes behave identically in subtype checking apart
from nullability, this simplifies subtype checking.

Also makes the runtime type representations for these types plus
`Function`, `Function?`, `Record` and `Record?` singletons in order to
simplify their equality and `hashCode`.

Change-Id: Iad51d1042d0f2f01c1190ba3f63edaeb32dac1dd
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/320540
Reviewed-by: Ömer Ağacan <omersa@google.com>
Commit-Queue: Aske Simon Christensen <askesc@google.com>
6 files changed
tree: 5465754820f54a99f96a9b4a1fc98d6745f3feb8
  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.code-workspace
  35. sdk_args.gni
  36. SECURITY.md
  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'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.