Chloe Stefantsova
72860d3569
Previously we would use the value of the `nullability` getter as the carry over nullablity for the substituted type. This CL changes that to `declaredNullability`. The change is observable in substituted extension types: their `nullability` is a combination of the representation type nullability and the declared nullability, and its value range includes `Nullability.undetermined`, which should not be available for `ExtensionType.declaredNullability`. The unexpected value for `ExtensionType.declaredNullability` was detected by the assert in `_NullabilityMarkerDetector.visitExtensionType`. Change-Id: I38f81df57db18ec94f2f6422134c02efe6649be6 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/350323 Reviewed-by: Johnni Winther <johnniwinther@google.com> Commit-Queue: Chloe Stefantsova <cstefantsova@google.com>
Dart Kernel
Dart Kernel is a small high-level language derived from Dart. It is designed for use as an intermediate format for whole-program analysis and transformations, and to be consumed by codegen and execution backends.
The kernel language has an in-memory representation in Dart and can be serialized as binary or text.
Both the kernel language and its implementations are unstable and are under development.
This package contains the Dart part of the implementation and contains:
- A transformable IR for the kernel language
- Serialization of kernel code
Note: The APIs in this package are in an early state; developers should be careful about depending on this package. In particular, there is no semver contract for release versions of this package. Please depend directly on individual versions.
See ast.dart for the in-memory IR, or binary.md for a description of the binary format. For now, the textual format is very ad-hoc and cannot be parsed back in.