Files
sdk/pkg/kernel
Chloe Stefantsova 47ba2f23a1 [cfe] Use semantic nullability in subtype case of least upper bound
Previously, the declared nullability was used, which doesn't account
for extension types that don't extend Object.

Closes https://github.com/dart-lang/sdk/issues/62242

Change-Id: I2ecf7f8fd53c362468523412b0b59037943e2971
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/473240
Reviewed-by: Johnni Winther <johnniwinther@google.com>
Commit-Queue: Chloe Stefantsova <cstefantsova@google.com>
2026-01-15 03:39:31 -08:00
..
2025-02-19 09:33:31 -08:00

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.