unnecessary_const

Avoid const keyword.

AVOID repeating const keyword in a const context.

BAD:

class A { const A(); }
m(){
  const a = const A();
  final b = const [const A()];
}

GOOD:

class A { const A(); }
m(){
  const a = A();
  final b = const [A()];
}

To enable the unnecessary_const rule, add unnecessary_const under linter > rules in your analysis_options.yaml file:

linter:
  rules:
    - unnecessary_const

If you're instead using the YAML map syntax to configure linter rules, add unnecessary_const: true under linter > rules:

linter:
  rules:
    unnecessary_const: true

Unless stated otherwise, the documentation on this site reflects Dart 3.6.0. Page last updated on 2025-01-27. View source or report an issue.