Nate Biggs
92ae8b61ec
'canInvokeTypeEquality' was assuming that if a single case was a Type expression, then type equality should be used for the whole switch statement. This is incorrect because if a single case is a type expression but the rest are, for example, ints (as in the fixed test) then the int cases should be compared with identical while only the type expression should be compared with ==. More importantly, the expected type of the case expression constants should be top type rather than the Type type. Top type is the union of Type and the other case type. Switches that only include Type expressions will now use "top" type as well but in general switching on a Type expression is an antipattern we shouldn't optimize for. And the impact of not specializing the switch type to Type should be very minimal. Fixes: https://github.com/dart-lang/sdk/issues/63476 Change-Id: Ib96172f157d8cf3093199e5127d4835e7b25011c Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/509920 Reviewed-by: Martin Kustermann <kustermann@google.com> Commit-Queue: Nate Biggs <natebiggs@google.com>
Dart
An approachable, portable, and productive language for high-quality apps on any platform
Dart is:
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Approachable: Develop with a strongly typed programming language that is consistent, concise, and offers modern language features like null safety and patterns.
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Portable: Compile to ARM, x64, or RISC-V machine code for mobile, desktop, and backend. Compile to JavaScript or WebAssembly for the web.
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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:
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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.
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Dart Web: For programs targeting the web, Dart Web includes both a development time compiler (dartdevc) and a production time compiler (dart2js).
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 in our repo at docs.
Contributing to Dart
The easiest way to contribute to Dart is to file issues.
You can also contribute patches, as described in Contributing.
Roadmap
Future plans for Dart are included in the combined Dart and Flutter roadmap on the Flutter wiki.