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Field promotions should apply inside irrefutable patterns.

field-promotionIssues related to addressing the lack of field promotionIssues related to addressing the lack of field promotion

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

patternsIssues related to pattern matching.Issues related to pattern matching.

Status: Open.

#4347 In dart-lang/language;

· stereotype441 opened on May 1, 2025

Type Promotion on Record Attributes

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

field-promotionIssues related to addressing the lack of field promotionIssues related to addressing the lack of field promotion

type-inferenceType inference, issues or improvementsType inference, issues or improvements

Status: Open.

#4165 In dart-lang/language;

· caseycrogers opened on Nov 19, 2024

Inconsistent behavior of field promotion in irrefutable patterns.

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

field-promotionIssues related to addressing the lack of field promotionIssues related to addressing the lack of field promotion

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

patternsIssues related to pattern matching.Issues related to pattern matching.

Status: Open.

#3418 In dart-lang/language;

· stereotype441 opened on Oct 19, 2023

Value fields

field-promotionIssues related to addressing the lack of field promotionIssues related to addressing the lack of field promotion

Status: Open.

#3332 In dart-lang/language;

· leafpetersen opened on Sep 8, 2023

[Field promotion] Final expressions

field-promotionIssues related to addressing the lack of field promotionIssues related to addressing the lack of field promotion

Status: Open.

#3327 In dart-lang/language;

· leafpetersen opened on Sep 6, 2023

Consider allowing static constant fields and top level constants to be considered stable and promotable

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

field-promotionIssues related to addressing the lack of field promotionIssues related to addressing the lack of field promotion

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

type-inferenceType inference, issues or improvementsType inference, issues or improvements

Status: Open.

#3326 In dart-lang/language;

· stereotype441 opened on Sep 6, 2023

Consider allowing static fields and top level variables in the same library to be considered stable and promotable (if they’re final)

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

field-promotionIssues related to addressing the lack of field promotionIssues related to addressing the lack of field promotion

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

type-inferenceType inference, issues or improvementsType inference, issues or improvements

Status: Open.

#3325 In dart-lang/language;

· stereotype441 opened on Sep 6, 2023

[Field Promotion] Promotion of fields on final classes

class-modifiersIssues related to "base", "final", "interface", and "mixin" modifiers on classes and mixins.Issues related to "base", "final", "interface", and "mixin" modifiers on classes and mixins.

field-promotionIssues related to addressing the lack of field promotionIssues related to addressing the lack of field promotion

Status: Open.

#3050 In dart-lang/language;

· leafpetersen opened on May 8, 2023

Support for Swift style if-let and guard-let constructs.

field-promotionIssues related to addressing the lack of field promotionIssues related to addressing the lack of field promotion

Status: Open.

#2074 In dart-lang/language;

· leafpetersen opened on Jan 20, 2022

Allow if-scoped variable declarations to help address field promotion

field-promotionIssues related to addressing the lack of field promotionIssues related to addressing the lack of field promotion

Status: Open.

#1991 In dart-lang/language;

· leafpetersen opened on Nov 24, 2021

An alternative syntax for if-variables

field-promotionIssues related to addressing the lack of field promotionIssues related to addressing the lack of field promotion

Status: Open.

#1975 In dart-lang/language;

· leafpetersen opened on Nov 19, 2021

Null safety flow analysis on nullable object fields

field-promotionIssues related to addressing the lack of field promotionIssues related to addressing the lack of field promotion

Status: Open.

#1722 In dart-lang/language;

· KristianBalaj opened on Jul 3, 2021