ab7dc265d7
This is not intended to change the result of the cast in any mode. An optimization for casting null in weak mode accidentally added warnings when casting to a FutureOr (non-nullable) of a legacy type. Also moves the `is` and `as` methods for FutureOr types from being hard-coded in the compiler to the runtime method that builds the type. Tested on golem and found no attributable performance regressions: https://golem.corp.goog/Comparison?team=dartdevc#targetA%3Ddartdevc-null%3BmachineTypeA%3Dlinux-x64%3BrevisionA%3D88970%3BpatchA%3Dnshahan-FutureOr-Fix%3BtargetB%3Ddartdevc-null%3BmachineTypeB%3Dlinux-x64%3BrevisionB%3D88964%3BpatchB%3DNone Change-Id: I44a23c7e2e1d15bc6c383fc95b19f99b584a3f7a Fixes: https://github.com/dart-lang/sdk/issues/43990 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/170001 Reviewed-by: Mark Zhou <markzipan@google.com> Commit-Queue: Nicholas Shahan <nshahan@google.com> |
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.dart_tool | ||
.github | ||
benchmarks | ||
build | ||
client | ||
docs | ||
pkg | ||
runtime | ||
samples | ||
samples-dev/swarm | ||
sdk | ||
tests | ||
third_party | ||
tools | ||
utils | ||
.clang-format | ||
.gitattributes | ||
.gitconfig | ||
.gitignore | ||
.gn | ||
.mailmap | ||
.packages | ||
.style.yapf | ||
.vpython | ||
AUTHORS | ||
BUILD.gn | ||
CHANGELOG.md | ||
codereview.settings | ||
CONTRIBUTING.md | ||
DEPS | ||
LICENSE | ||
PATENT_GRANT | ||
PRESUBMIT.py | ||
README.dart-sdk | ||
README.md | ||
sdk_args.gni | ||
WATCHLISTS |
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, getting started, and more.
Browse pub.dev for more packages and libraries contributed by the community and the Dart team.
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.