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dart-sdk/pkg/js_shared
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Stephen Adams ef6ce1e88a [dart2js] Basic records 
Records can be constructed, returned, and field accessed in non-dynamic code. Type checks don't work, so records cannot be added to generic collections like `List<(int,int>)`.

- Add runtime for base classes for records of various arities.

- Use impacts to collect record static types used.

- Create record classes for each record shape. Record classes have
  extra metadata properties on the prototype. This allows slower,
  general operations at the root of the hierarchy that can be
  overridden with specialized operations lower in the hierarchy.



Change-Id: Ic1b38a5076c2d05f2ecff0a9ed3255b43645386e
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/278699
Commit-Queue: Stephen Adams <sra@google.com>
Reviewed-by: Nate Biggs <natebiggs@google.com>
2023-01-12 04:44:16 +00:00
..
lib/synced [dart2js] Basic records 2023-01-12 04:44:16 +00:00
test
analysis_options.yaml [pkg/js_shared] address a few analysis issues 2022-06-23 23:34:18 +00:00
OWNERS
pubspec.yaml [pkg/js_shared] address a few analysis issues 2022-06-23 23:34:18 +00:00
README.md

README.md

Package js_shared:

This code is a compile time dependency of dart2js and DDC. It is imported as a package: import by both compilers.

There is an exact copy in the SDK of the libraries in the pkg/js_shared/lib/synced sub-directory. Those libraries are imported as dart: imports by the dart2js and DDC runtime libraries.

Important: all code under pkg/js_shared/lib/synced must be kept in sync with the runtime (in sdk/lib/_internal/js_shared/lib/synced) at all times. The test/in_sync_test.dart test verifies this.