[dart2wasm] Implement unmodifiable JS byte data 18994e6e46e removed unmodifiable view classes in the standard library that can make any implementation of `ByteData` and other typed_data types unmodifiable. Add a `_immutable` field to `JSDataViewImpl`, implement `asUnmodifiableView`. An alternative implementation would be adding a subcalss with overridden setters. However I think a simple boolean flag check should be better, as adding a subtype can make call sites polymorphic and prevent direct calls and inlining. (We can't do the same in native typed_data types because we allocate Wasm arrays with different element types for the fastest possible implementation in the common cases, so we need different `ByteData` implementations for different Wasm array types.) Bug: #56014 Change-Id: I674121cff14559128bc2a9deb318a3bc6adf316d Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/372082 Reviewed-by: Martin Kustermann <kustermann@google.com> Commit-Queue: Ömer Ağacan <omersa@google.com>
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).
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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.
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If you want to build Dart yourself, here is a guide to getting the source, preparing your machine to build the SDK, and building.
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You can also contribute patches, as described in Contributing.
Future plans for Dart are included in the combined Dart and Flutter roadmap on the Flutter wiki.