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Cleaned up a few entries in the CHANGELOG
Mostly addressing my comments on https://dart-review.googlesource.com/c/sdk/+/67860 for the dart2js section Change-Id: I421489088ba79be693fa07662a7c008f1f950944 Reviewed-on: https://dart-review.googlesource.com/68160 Reviewed-by: Vijay Menon <vsm@google.com> Commit-Queue: Sigmund Cherem <sigmund@google.com>
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CHANGELOG.md
78
CHANGELOG.md
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@ -104,7 +104,7 @@ significant changes across all areas of the platform. Large changes include:
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}
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```
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* Bounds on generic functions are invariant The following program now issues
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* Bounds on generic functions are invariant. The following program now issues
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an invalid override error ([issue 29014][sdk#29014]):
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```dart
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@ -391,7 +391,7 @@ Still need entries for all changes to dart:html since 1.x
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null, which is a value that was always possible for it to return previously.
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* Deprecated `packageRoot` parameter in `Isolate.spawnUri`, which is was
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previously used only for `packages/` directory resolution. That style of
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resolution is no longer supported in dart 2.
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resolution is no longer supported in Dart 2.
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<!--
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Still need entries for all changes to dart:js since 1.x
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@ -406,8 +406,9 @@ Still need entries for all changes to dart:js since 1.x
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* Added `IsolateMirror.loadUri`, which allows dynamically loading additional
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code.
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* Marked `MirrorsUsed` as deprecated. The mirrors library is no longer
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supported by dart2js, and `MirrorsUsed` only affected dart2js.
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* Marked `MirrorsUsed` as deprecated. The `MirrorsUsed` annotation was only
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used to inform the dart2js compiler about how mirrors were used, but dart2js
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no longer supports the mirrors library altogether.
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<!--
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Still need entries for all changes to dart:svg since 1.x
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@ -435,13 +436,13 @@ Still need entries for all changes to dart:web_audio,web_gl,web_sql since 1.x
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https://github.com/dart-lang/sdk/blob/master/docs/language/informal/int64.md
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for details.
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* The dart VM no longer attempts to perform `packages/` directory resolution
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* The Dart VM no longer attempts to perform `packages/` directory resolution
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(for loading scripts, and in `Isolate.resolveUri`). Users relying on
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`packages/` directories should switch to `.packages` files.
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### Dart for the Web
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* Expose Javascript Promise APIs using Dart futures. For example,
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* Expose JavaScript Promise APIs using Dart futures. For example,
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`BackgroundFetchManager.get` is defined as:
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```dart
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@ -481,60 +482,35 @@ Still need entries for all changes to dart:web_audio,web_gl,web_sql since 1.x
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#### dart2js
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* The dart2js compiler now uses the common front-end by default. This is a
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step towards supporting Dart 2.0. At this time dart2js has no semantic
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changes: the Dart 2.0 strong-mode semantics are not enabled, so dart2js
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continues to support the Dart 1 type system. This change however lets us
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start supporting new syntactic features of Dart 2.0, like optional
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new/const. With this change you may notice:
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* dart2js now compiles programs with Dart 2.0 semantics. Apps are expected to
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be bigger than before, because Dart 2.0 has many more implicit checks
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(similar to the `--checked` flag in Dart 1.0).
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* Small code differences (~1% code size): some code is generated slightly
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different, this is expected because the internal representation of the
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program has small differences between the old and new front end.
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We exposed a `--omit-implicit-checks` flag which removes most of the extra
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implicit checks. Only use this if you have enough test coverage to know that
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the app will work well without the checks. If a check would have failed and
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it is omitted, your app may crash or behave in unexpected ways. This flag is
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similar to `--trust-type-annotations` in Dart 1.0.
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* Source-maps changes: with the new front-end, dart2js also is using a new
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mechanism to generate source-map files. We don't expect big differences
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here either, the new source-maps try to encode more data for locations
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that are commonly used during debugging.
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* dart2js replaced its front-end with the common front-end (CFE). Thanks to
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the CFE, dart2js errors are more consistent with all other Dart tools.
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* Some missing errors: the CFE is not complete and may not report some
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static errors that the old front-end did. This is temporary. If you run
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the analyzer on all your project already, you may never notice those
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missing error messages.
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* dart2js replaced its source-map implementation. There aren't any big
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differences, but more data is emitted for synthetic code generated by the
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compiler.
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* As announced earlier, this is the first version of dart2js that no
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longer supports `dart:mirrors`.
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* `dart:mirrors` support was removed. Frameworks are encouraged to use
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code-generation instead. Conditional imports indicate that mirrors are not
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supported, and any API in the mirrors library will throw at runtime.
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* This is the first version of dart2js that no longer supports
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`--package-root`, which long ago was deprecated in favor of
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`--packages`.
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* The generated output of dart2js can now be run as webworker.
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* Fixed `--no-frequency-based-minification`, which was not working together
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with the common front-end ([issue 32600][sdk#32600]).
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* Support `--categories=Server` with the common front-end. This included also
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fixes for the constant value `bool.fromEnvironment("*")` of
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"dart.libraries.io", "dart.libraries.mirrors", "dart.libraries.isolate", and
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"dart.libraries.html".
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* Several fixes to improve support for running output of dart2js as a
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webworker.
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* `dart:isolate` implementation removed. To launch background tasks, please
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* `dart:isolate` support was removed. To launch background tasks, please
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use webworkers instead. APIs for webworkers can be accessed from `dart:html`
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or JS-interop.
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* Dart2js now compiles programs by default with Dart 2.0 semantics. Apps are
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expected to be bigger than before, because Dart 2.0 has many more implicit
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checks (similar to the `--checked` flag in Dart 1.0).
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* Add `--omit-implicit-checks` which removes most of the extra implicit
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checks. Only use this if you have enough test coverage to know that the app
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will work well without the checks. If a check would have failed and it is
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omitted, your app may crash or behave in unexpected ways.
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[sdk#32561]: https://github.com/dart-lang/sdk/issues/32561
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[sdk#32600]: https://github.com/dart-lang/sdk/issues/32600
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* dart2js no longer supports the `--package-root` flag. This flag was
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deprecated in favor of `--packages` long ago.
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### Tool Changes
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