Contents
Contents

Avoid final for parameter declarations.

This rule is available as of Dart 2.16.0.

Incompatible rules: prefer_final_parameters

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

Usage

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