[dart2wasm] Add basic support for exceptions. This CL adds support for try, catch, throw, and rethrow. In addition, it adds stack trace support. If functions have names then these will print in the stack trace. This CL flips an additional 53 tests to passing(5241 -> 5294). 1 test which was passing on TOT now crashes at compile time due to a missing language feature which is now reachable through compilation of a catch block. A number of other tests flip from runtime errors to compile time crashes due to similar issues. Note: TryFinally is implemented in the follow on. Change-Id: I740dd25c4e062e1be2f50bbd18d1302575dff6f1 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/226808 Reviewed-by: Aske Simon Christensen <askesc@google.com> Commit-Queue: Joshua Litt <joshualitt@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 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).
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.
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You can also contribute patches, as described in Contributing.