0662b64697
This is the second part of the referenced issue. Practically, we don't do anything special during demotion, we merely demote when write T to such type S, that T <: S. This S must be a type of interest (tested or declared). If it happens to be nullable, and T < NonNull(S), we will promote to NonNull(S). Bug: https://github.com/dart-lang/sdk/issues/40011 Change-Id: I254b4bfbbfad47fa2c2811def864c8ce0419b7c9 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/145740 Reviewed-by: Paul Berry <paulberry@google.com> Commit-Queue: Konstantin Shcheglov <scheglov@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.