[dart2js] Assume `isPotentialSubtype` is always true. The current implementation of this check is incorrect and produces false negatives. Conservatively assuming that one type is always a potential subtype of another is a simple fix to get this working. The main downsides are that we may emit signatures and provide type arguments to functions even when they're not needed because we no longer statically deduce that a type check must fail. This may cause size regressions. I've added a TODO to add proper constraint solving per the local type inference spec, but this is not currently a priority since no regression is observed on large Google apps. Change-Id: Ie5065596331c33a030e06e66481f258ef937e659 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/155544 Reviewed-by: Stephen Adams <sra@google.com> Commit-Queue: Mayank Patke <fishythefish@google.com>
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 is free and open source.
See LICENSE and PATENT_GRANT.
Visit the dart.dev to learn more about the language, tools, getting started, and more.
Browse pub.dev for more packages and libraries contributed by the community and the Dart team.
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.
The easiest way to contribute to Dart is to file issues.
You can also contribute patches, as described in Contributing.