undefined_referenced_parameter
The parameter '{0}' isn't defined by '{1}'.
Description
#The analyzer produces this diagnostic when an annotation of the form UseResult.unless(parameterDefined: parameterName)
specifies a parameter name that isn't defined by the annotated function.
Example
#The following code produces this diagnostic because the function f
doesn't have a parameter named b
:
dart
import 'package:meta/meta.dart';
@UseResult.unless(parameterDefined: 'b')
int f([int? a]) => a ?? 0;
Common fixes
#Change the argument named parameterDefined
to match the name of one of the parameters to the function:
dart
import 'package:meta/meta.dart';
@UseResult.unless(parameterDefined: 'a')
int f([int? a]) => a ?? 0;
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Provide details Unless stated otherwise, the documentation on this site reflects Dart 3.8.1. Page last updated on 2025-05-08. View source or report an issue.