Paul Berry
602e38eab4
When entering visiting a subpattern of an object pattern, the flow analysis engine now updates `_FlowAnalysisImpl._scrutineeReference` to a `_PropertyReference` referring to the property being matched; this ensures that if the subpattern match implies a type promotion, and the property in question is promotable, the type promotion will be applied to the property. Also, if the property has already been promoted at the time of entry to the subpattern, the promoted property type is used as the matched value type. Includes unit tests and language tests for the new functionality. Fixes #53100. Change-Id: I6d28e9a7d188bf1136e8517d6aa06af3b4c31c69 Bug: https://github.com/dart-lang/sdk/issues/53100 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/323001 Reviewed-by: Konstantin Shcheglov <scheglov@google.com> Commit-Queue: Paul Berry <paulberry@google.com>