[analyzer] Ensure watchers can be subscribed to more than once The stream created by memory resources was a single-subscriber stream. The stream from the physical file system watchers was a broadcast stream, but the code to translate FileSystemException to the abstractions was written in a way that made it single-subscriber. This fixes both to ensure that a `ResourceWatcher` can support multiple subscribers that can subscribe and cancel at different times. We don't currently use this, so this change should effectively be a no-op right now, but it will allow us to reuse the temporary catchers we create when set up analysis roots instead of creating new ones. There's an issue at https://github.com/dart-lang/sdk/issues/54274 discussing changing how we watch here, but it may still be worth picking the low-hanging fruit in the short-term. Change-Id: I3bda77ddaee676c573021aa671cb01bae48bd56f Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/341740 Reviewed-by: Brian Wilkerson <brianwilkerson@google.com> Commit-Queue: Brian Wilkerson <brianwilkerson@google.com> Reviewed-by: Konstantin Shcheglov <scheglov@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.
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.
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You can also contribute patches, as described in Contributing.