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dart / sdk / c5fb584a751a6fc6307d71bbbdebb85931df1b59
commitc5fb584a751a6fc6307d71bbbdebb85931df1b59[log] [tgz]
authorPaul Berry <paulberry@google.com>Wed Jan 17 21:55:14 2024 +0000
committerCommit Queue <dart-scoped@luci-project-accounts.iam.gserviceaccount.com>Wed Jan 17 21:55:14 2024 +0000
treeea85ec5fb2c44b77d53bd446701bfc5cc1b8d357
parent4b273b44816bdd73c0f2247d257df53e27787443 [diff]
Language test pattern type schemas.

I discovered recently that when we implemented the "patterns" feature,
we got the pattern type schema for cast patterns wrong--it was
specified to be `_`, but what was actually implemented was
`Object?`. I've filed a breaking change request to address that:
https://github.com/dart-lang/sdk/issues/54640.

In the course of prototyping a fix, I was surprised to find that no
language tests or co19 tests were affected; it appears that we don't
have adequate test coverage of pattern type schemas. This CL addresses
the lack of test coverage by adding a language test.

The test case for cast patterns is currently commented out, pending
resolution of the breaking change request; after the breaking change
lands, I will update the test accordingly.

Change-Id: I0d27fd8ac65f16d21a8597586e6f76fd9a5ba86e
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/346621
Commit-Queue: Paul Berry <paulberry@google.com>
Reviewed-by: Bob Nystrom <rnystrom@google.com>
1 file changed
tree: ea85ec5fb2c44b77d53bd446701bfc5cc1b8d357
  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.