| commit | 16ed7df34fd15f13592a38c5c7482a497d7a0ca2 | [log] [tgz] |
|---|---|---|
| author | Paul Berry <paulberry@google.com> | Mon Jul 18 14:51:24 2022 +0000 |
| committer | Commit Bot <commit-bot@chromium.org> | Mon Jul 18 14:51:24 2022 +0000 |
| tree | 03d15fd793f008844920c6df0f15ff4d72e06dd8 | |
| parent | 145a9230de377dc1564ea563c55afbfa1912f102 [diff] |
Flow analysis: clarify behavior of ifNullExpression_rightBegin. Previously, it was unclear what information was stored in _IfNullExpressionContext._previous. It turned out that it was the "shortcut state", i.e. the flow state if the LHS of the `??` was non-`null`. I've renamed variables and added comments to clarify this. Also, based on the implementation of `ifNullExpression_rightBegin`, it looked like it might update `_current`, but in fact it did not (because `tryMarkNonNullable` always returns an `ExpressionInfo` whose `ifFalse` is unchanged); I've refactored the code so that this is clearer, and added a comment explaining why it is the right thing to do. Bug: https://github.com/dart-lang/language/issues/2020 Change-Id: Ib8a5235f9b9482f4b290ad90686385514660a95d Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/251142 Reviewed-by: Johnni Winther <johnniwinther@google.com> Commit-Queue: Paul Berry <paulberry@google.com> Reviewed-by: Konstantin Shcheglov <scheglov@google.com>
Dart is:
Optimized for UI: Develop with a programming language specialized around the needs of user interface creation.
Productive: Make changes iteratively: use hot reload to see the result instantly in your running app.
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:
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.
Dart Web: For programs targeting the web, Dart Web includes both a development time compiler (dartdevc) and a production time compiler (dart2js).
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See LICENSE and PATENT_GRANT.
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