Kallen Tu
7b135fc7a6
Used to separate the behaviour without the variance experiment flag turned off and with the flag turned on. Allows for more specific error descriptions and allows the backend to avoid emitting variance annotations for legacy covariance and only when the experiment is enabled, otherwise there is no way of knowing whether the variance is user specified. Change-Id: Ia3070a1358e9b0fef10a3ce5057df881b9659832 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/121140 Commit-Queue: Kallen Tu <kallentu@google.com> Reviewed-by: Dmitry Stefantsov <dmitryas@google.com> Reviewed-by: Leaf Petersen <leafp@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.