prefer_const_declarations

Prefer const over final for declarations.

PREFER using const for constant-valued declarations.

Constant declarations are more hot-reload friendly and allow values to be used in other constant expressions.

BAD:

final o = const <int>[];

class A {
  static final o = const <int>[];
}

GOOD:

const o = <int>[];

class A {
  static const o = <int>[];
}

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

linter:
  rules:
    - prefer_const_declarations

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

linter:
  rules:
    prefer_const_declarations: true