Alexander Markov
1777f769ab
If tree shaker doesn't visit TypeParameterType.promotedBound which contains the only reference to a particular class it may remove that class, leaving a dangling reference from promotedBound. After that kernel AST serialization would crash with "Missing canonical name for Reference" error. This change also fixes TypeParameterType.visitChildren. TEST=pkg/vm/testcases/transformations/type_flow/transformer/regress_47878.dart Fixes https://github.com/dart-lang/sdk/issues/47878 Change-Id: I555261713240bf0be412db27efb68f32cfd8008b Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/222781 Reviewed-by: Johnni Winther <johnniwinther@google.com> Commit-Queue: 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.