39b8f7bef4
Before this CL kernel tags had specialized tags that was marked by the single high bit, then using the three lowest bits for a value: 128 + value = 0b10000xxx 136 + value = 0b10001xxx 144 + value = 0b10010xxx So the numbers from 128 to 151 is taken by this scheme, but because of the high bit marking stuff being special we can't really use 152-256. This CL shifts the specialized tags up so it instead uses the 3 highest bits as a marker while still using the lower 3 bits for the value: 224 + value = 0b11100xxx 232 + value = 0b11101xxx 240 + value = 0b11110xxx This takes up 224-247 and leave 248-255 unused. It would let us use 128-223 though. (If we eventually need more we can probably remove one of the specialized ranges (SpecializedVariableSet isn't used very much in previously sampled dill files) and use 4 bits for tagging). Additionally, a tool to print free tags has been added (via binary.md), and the "binary version is in sync with VM" test has been prepared for version > 99. TEST=Existing tests. Change-Id: If77b12cee6fc3801628dd67dc40afbb018ec8a61 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/284302 Reviewed-by: Martin Kustermann <kustermann@google.com> Reviewed-by: Johnni Winther <johnniwinther@google.com> Commit-Queue: Jens Johansen <jensj@google.com> |
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Dart
A client-optimized language for fast apps on any platform
Dart is:
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Optimized for UI: Develop with a programming language specialized around the needs of user interface creation.
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Productive: Make changes iteratively: use hot reload to see the result instantly in your running app.
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Fast on all platforms: Compile to ARM & x64 machine code for mobile, desktop, and backend. Or compile to JavaScript for the web.
Dart's flexible compiler technology lets you run Dart code in different ways, depending on your target platform and goals:
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Dart Native: For programs targeting devices (mobile, desktop, server, and more), Dart Native includes both a Dart VM with JIT (just-in-time) compilation and an AOT (ahead-of-time) compiler for producing machine code.
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Dart Web: For programs targeting the web, Dart Web includes both a development time compiler (dartdevc) and a production time compiler (dart2js).
License & patents
Dart is free and open source.
See LICENSE and PATENT_GRANT.
Using Dart
Visit dart.dev to learn more about the language, tools, and to find codelabs.
Browse pub.dev for more packages and libraries contributed by the community and the Dart team.
Our API reference documentation is published at api.dart.dev, based on the stable release. (We also publish docs from our beta and dev channels, as well as from the primary development branch).
Building Dart
If you want to build Dart yourself, here is a guide to getting the source, preparing your machine to build the SDK, and building.
There are more documents on our wiki.
Contributing to Dart
The easiest way to contribute to Dart is to file issues.
You can also contribute patches, as described in Contributing.