whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  1. TResult? $default(
    1. String userId,
    2. bool expired,
    3. String? token,
    4. String? platform,
    5. String? productId,
    6. String? purchaseId,
    7. String? packageName,
    8. int? expiredTime,
    9. String? orderId,
    )?
)

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(
          String userId,
          bool expired,
          String? token,
          String? platform,
          String? productId,
          String? purchaseId,
          String? packageName,
          int? expiredTime,
          String? orderId)?
      $default,
) {
  final _that = this;
  switch (_that) {
    case _PurchaseSubscriptionModel() when $default != null:
      return $default(
          _that.userId,
          _that.expired,
          _that.token,
          _that.platform,
          _that.productId,
          _that.purchaseId,
          _that.packageName,
          _that.expiredTime,
          _that.orderId);
    case _:
      return null;
  }
}