0e524b949a
`sealed` and `abstract` modifiers are mutually exclusive. Error when a user tries to use them together on a class declaration. Implemented in the parser since it's a common error between the analyzer and the CFE. Change-Id: I9a8835c29ddb430ea0f005630bbdf9348f8b055c Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/269260 Reviewed-by: Konstantin Shcheglov <scheglov@google.com> Reviewed-by: Johnni Winther <johnniwinther@google.com> Commit-Queue: Kallen Tu <kallentu@google.com>
FE/analyzer shared code
This package contains logic that is shared between the front_end and analyzer packages. It is intended solely to facilitate development of the Dart SDK, and is not intended for use by end users. In particular, this package has no public API, so no guarantee is made of compatibility between one version of the package and the next.
End users should consider using the analyzer package to analyze Dart source code.