This allows us to write enums in the mock SDK (which is currently broken). This will allow me to land such an enum in the SDK, in
https://dart-review.googlesource.com/c/sdk/+/445403.
This diverges from the actual Dart SDK implementation of the Enum class
and the _Enum class. I think this is an acceptable divergence; these
classes hardly ever change, and the changes will be easy to follow
when they come, however many months or years from now.
Change-Id: Ia6ff3803415af8c251dbee330a218f2618395cc4
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/446141
Reviewed-by: Konstantin Shcheglov <scheglov@google.com>
Commit-Queue: Samuel Rawlins <srawlins@google.com>
Sam Rawlins
1e7cb9dfed