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Add item in CHANGELOG.md about relaxed constant factory constructor rule

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Change-Id: Ia4a9ffa1b4e27abcea66dca985d099f9fef75790
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/211400
Commit-Queue: Erik Ernst <eernst@google.com>
Reviewed-by: Michael Thomsen <mit@google.com>
This commit is contained in:
Erik Ernst 2021-08-31 15:09:40 +00:00 committed by commit-bot@chromium.org
parent ed3824a220
commit 65b5125223
1 changed files with 31 additions and 5 deletions
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36
CHANGELOG.md
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@ -45,6 +45,32 @@
[#1785]: https://github.com/dart-lang/language/issues/1785
- Restrictions on members of a class with a constant constructor are relaxed
such that they only apply when the class has a _generative_ constant
constructor. For example, this used to be an error, but is now permitted:
```dart
abstract class A {
var v1;
late final v2 = Random().nextInt(10);
late final v3;
const factory A() = B;
}
class B implements A {
get v1 => null;
set v1(_) => throw 'Cannot mutate B.v1';
final v2 = 0;
final v3;
set v3(_) => throw 'Cannot initialize B.v3';
const B([this.v3 = 1]);
}
```
This implements a relaxation of the specified rule for a `late final`
instance variable, and it brings the implementation behavior in line with
the specification in all other cases.
### Tools
#### Dart command line
@ -223,13 +249,13 @@
#### Linter
Updated the Linter to `1.10.0`, which includes changes that
- improves regular expression parsing performance for common checks
- improves regular expression parsing performance for common checks
(`camel_case_types`, `file_names`, etc.).
- (internal) migrates to analyzer 2.1.0 APIs.
- fixes false positive in `use_build_context_synchronously` in awaits inside
- fixes false positive in `use_build_context_synchronously` in awaits inside
anonymous functions.
- fixes `overridden_fields` false positive w/ static fields.
- fixes false positive in `avoid_null_checks_in_equality_operators` w/
- fixes false positive in `avoid_null_checks_in_equality_operators` w/
non-nullable params.
- fixes false positive for deferred imports in `prefer_const_constructors`.
- marks `avoid_dynamic_calls` stable.
@ -257,7 +283,7 @@ Updated the Linter to `1.10.0`, which includes changes that
- fix `curly_braces_in_flow_control_structures` to properly flag terminating `else-if`
blocks.
- improve `always_specify_types` to support type aliases.
- fix a false positive in `unnecessary_string_interpolations` w/ nullable interpolated
- fix a false positive in `unnecessary_string_interpolations` w/ nullable interpolated
strings
- fix a false positive in `avoid_function_literals_in_foreach_calls` for nullable
iterables.
@ -345,7 +371,7 @@ Updated the Linter to `1.10.0`, which includes changes that
`--legacy-javascript` flag will let you opt out of this update, but this
flag will be removed in a future release. Modern browsers will not be
affected, as Dart2JS continues to support [last two major releases][1] of
Edge, Safari, Firefox, and Chrome.
Edge, Safari, Firefox, and Chrome.
[#46545]: https://github.com/dart-lang/sdk/issues/46545
[1]: https://dart.dev/faq#q-what-browsers-do-you-support-as-javascript-compilation-targets