Johnni Winther
4fc0e1f13d
The .getStaticType results for NullLiteral and NullConstant are inconsistent. The former returns `const BottomType()` and the latter return `TypeEnvironment.nullType`. To avoid this inconsistency and since `const BottomType()` is really the "unreachable" type, used for instance of for the type of a throw expression, the implementation is changed to consistently use the .nullType. For this to work, getStaticTypeAsInstanceOf (and the equivalent dart2js implementation), and the `Type.fromStaticType` constructor in the VM type flow analysis have to special case the .nullType. Change-Id: If6b806d4a39ef7b906275c43fa2089b9d140523b Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/98563 Commit-Queue: Johnni Winther <johnniwinther@google.com> Reviewed-by: Alexander Markov <alexmarkov@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.