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dart / sdk / 7532b5b1382803dad325b2f7c25851adde87a650
commit7532b5b1382803dad325b2f7c25851adde87a650[log] [tgz]
authorPaul Berry <paulberry@google.com>Tue Feb 07 14:22:56 2023 +0000
committerCommit Queue <dart-scoped@luci-project-accounts.iam.gserviceaccount.com>Tue Feb 07 14:22:56 2023 +0000
tree89376a9517dbc5dcf72c881bdcf930dbdb0608b8
parentbd13fc128d3b2e6f41f57c648a4fcb345afdded9 [diff]
Flow analysis: store full EqualityInfo for pattern scrutinees.

This will make it possible to generalize the flow analysis logic we
already have for equality expressions and calls to `identical`, so
that we can use it for constant patterns (which implicitly do an
equality check) and relational patterns involving `==` or `!=`.

This requires adding a new method to the flow analysis API,
`FlowAnalysis.assignedVariablePattern`, to handle variable references
appearing inside a pattern assignment.  Previously we were able to use
`FlowAnalysis.write` for this purpose, relying on its call to
`getExpressionInfo` to gather the relevant information about the RHS
of the assignment.  But now, since we are calling
`equalityOperand_end` from `_pushScrutinee`, the expression info is no
longer available at the time we visit the variable reference.

Change-Id: I9a28bced97dcf6ee15674eaa4430910121185489
Bug: https://github.com/dart-lang/sdk/issues/50419
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/280219
Reviewed-by: Johnni Winther <johnniwinther@google.com>
Commit-Queue: Paul Berry <paulberry@google.com>
2 files changed
tree: 89376a9517dbc5dcf72c881bdcf930dbdb0608b8
  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.