avoid_final_parameters

Avoid final for parameter declarations.

This rule is available as of Dart 2.16.0.

Details

AVOID declaring parameters as final.

Declaring parameters as final can lead to unnecessarily verbose code, especially when using the “parameter_assignments” rule.

BAD:

void goodParameter(final String label) { // LINT
  print(label);
}

GOOD:

void badParameter(String label) { // OK
  print(label);
}

BAD:

void goodExpression(final int value) => print(value); // LINT

GOOD:

void badExpression(int value) => print(value); // OK

BAD:

[1, 4, 6, 8].forEach((final value) => print(value + 2)); // LINT

GOOD:

[1, 4, 6, 8].forEach((value) => print(value + 2)); // OK

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

linter:
  rules:
    - avoid_final_parameters