whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  1. TResult? $default(
    1. int id,
    2. int userId,
    3. int attributeId,
    4. String value,
    5. DateTime createdAt,
    6. DateTime updatedAt,
    )?
)

A variant of when that fallback to returning null

It is equivalent to doing:

switch (sealedClass) {
  case Subclass(:final field):
    return ...;
  case _:
    return null;
}

Implementation

@optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  TResult? Function(
    int id,
    int userId,
    int attributeId,
    String value,
    DateTime createdAt,
    DateTime updatedAt,
  )?
  $default,
) {
  final _that = this;
  switch (_that) {
    case _Sub2ApiAdminUserAttributeValue() when $default != null:
      return $default(
        _that.id,
        _that.userId,
        _that.attributeId,
        _that.value,
        _that.createdAt,
        _that.updatedAt,
      );
    case _:
      return null;
  }
}