Jens Johansen
57d48dcc9f
Before this CL, if initializing from a dill file containing a class, say A, but it wasn't used, and then later using it as a type, say 'A a = new A()', the class hierarchy would complain about not knowing A. This was caused by the class hierarchy initially being constructed using the full component of the first compile (i.e. in the example above without any usage of A and thus without including A), and subsequent compiles telling the class hierarchy about new classes created in that compile. The problem was, that if the class was loaded from a dill file (in the example above 'A' was such a class) it would never be included if not a part of the first full component. This CL fixes it by changing the interface to the class hierarchys `applyTreeChanges` function and letting the class hierarchy know about libraries too: It will now basically just be given the full component when asked to update, and just update with the libraries it doesn't already know about. In the example above that would - once using 'A' - include 'A'. Change-Id: I895100b51659938636da0bca6c80516d87b57a24 Reviewed-on: https://dart-review.googlesource.com/69302 Reviewed-by: Aske Simon Christensen <askesc@google.com> Commit-Queue: Jens Johansen <jensj@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 as a frontend for codegen and execution backends.
The kernel language has in-memory representations in Dart and C++, 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
- A frontend based on the analyzer
- 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.
Getting Kernel
Checkout the repository and run pub get:
git clone https://github.com/dart-lang/kernel
cd kernel
pub get
Command-Line Tool
Run tool/dartk.dart from the command-line to convert between .dart files
and the serialized binary and textual formats.
dartk expects the .dill extension for files in the binary format.
The textual format has no preferred extension right now.
Example commands:
dartk foo.dart # print text IR for foo.dart
dartk foo.dart -ofoo.dill # write binary IR for foo.dart to foo.dill
dartk foo.dill # print text IR for binary file foo.dill
Pass the --link or -l flag to link all transitive dependencies into one file:
dartk myapp.dart -ppackages -l -omyapp.dill # Bundle everything.
dartk myapp.dill # Print it back out in a (very, very long) textual format.
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.
Testing
If you plan to make changes to kernel, get a checkout of the Dartk SDK and run:
tool/regenerate_dill_files.dart --sdk <path to SDK checkout>
pub run test
Linking
Linking from binary files is not yet implemented. In order to compile a whole program, currently everything must be compiled from source at once.