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Language proposal for getting rid of the interface ambiguity of a class with private members

featureProposed language feature that solves one or more problemsProposed language feature that solves one or more problems

Status: Open.

#4666 In dart-lang/language;

· acarstoiu opened on Mar 18, 2026

Support static analysis of required operations

featureProposed language feature that solves one or more problemsProposed language feature that solves one or more problems

Status: Open.

#4665 In dart-lang/language;

· eernstg opened on Mar 18, 2026

Clarify interactions among primary constructors and augmentation

augmentationsIssues related to the augmentations proposal.Issues related to the augmentations proposal.

primary-constructorsFeature for less verbose constructors, otherwise known as declaring constructors.Feature for less verbose constructors, otherwise known as declaring constructors.

small-featureA small feature which is relatively cheap to implement.A small feature which is relatively cheap to implement.

Status: Open.

#4662 In dart-lang/language;

· eernstg opened on Mar 17, 2026

[void] Treat return and yield statements consistently in the void usage allowlist

bugThere is a mistake in the language specification or in an active documentThere is a mistake in the language specification or in an active document

specification

Status: Open.

#4660 In dart-lang/language;

· eernstg opened on Mar 9, 2026

[void] Treat actual arguments uniformly in the void allowlist

bugThere is a mistake in the language specification or in an active documentThere is a mistake in the language specification or in an active document

specification

Status: Open.

#4659 In dart-lang/language;

· eernstg opened on Mar 9, 2026

It is inconvenient to extend a class which has an unnamed factory

requestRequests to resolve a particular developer problemRequests to resolve a particular developer problem

Status: Open.

#4658 In dart-lang/language;

· TekExplorer opened on Mar 9, 2026

False positive with invalid_use_of_type_outside_library when a class both 'extends' and 'implements' an interface

featureProposed language feature that solves one or more problemsProposed language feature that solves one or more problems

Status: Open.

#4657 In dart-lang/language;

· rrousselGit opened on Mar 9, 2026

Deprecate and remove "default constructors" feature.

breaking-change

featureProposed language feature that solves one or more problemsProposed language feature that solves one or more problems

Status: Open.

#4654 In dart-lang/language;

· lrhn opened on Mar 6, 2026

Restore the ability to choose the parameter name of a setter in an augmenting declaration

augmentationsIssues related to the augmentations proposal.Issues related to the augmentations proposal.

bugThere is a mistake in the language specification or in an active documentThere is a mistake in the language specification or in an active document

specification

Status: Open.

#4652 In dart-lang/language;

· eernstg opened on Mar 3, 2026

Disallow implementing the same generic interface with different instantiations in all cases?

questionFurther information is requestedFurther information is requested

Status: Open.

#4644 In dart-lang/language;

· lrhn opened on Feb 23, 2026

Recognize null-shorting + if-null as a control flow with nice properties?

featureProposed language feature that solves one or more problemsProposed language feature that solves one or more problems

flow-analysisDiscussions about possible future improvements to flow analysisDiscussions about possible future improvements to flow analysis

Status: Open.

#4637 In dart-lang/language;

· eernstg opened on Feb 17, 2026

Improve on the precision when talking about static namespaces

bugThere is a mistake in the language specification or in an active documentThere is a mistake in the language specification or in an active document

specification

Status: Open.

#4636 In dart-lang/language;

· eernstg opened on Feb 14, 2026