avoid-nested-assignments

v1.28.0

warning

effort: 2m

configurable

pro+

Warns when an assignment is used inside another expression.

Assigning to a variable inside another expression can be confusing and reduce readability. Consider moving the assignment out.

⚙️ Config

Set ignore-null-aware-assignments (default is false) to exclude null aware assignments.

analysis_options.yaml

dart_code_metrics:
  rules:
    - avoid-nested-assignments:
        ignore-null-aware-assignments: false

Example

❌ Bad:

void fn() {
  var userName = 'Someone';
  
  // LINT: Avoid nested assignments. Try moving this assignment out.
  final message = "Hello ${userName = 'Someone Else'}!";
}

✅ Good:

void fn() {
  var userName = 'Someone Else';
  ...
  final message = "Hello ${userName}!";
}

Related Rules

• avoid-assignments-as-conditions
• avoid-multi-assignment