whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  1. TResult? $default(
    1. bool? isPrimary,
    2. String? fullAddress,
    3. String? addressId,
    4. String? line1,
    5. String? line2,
    6. String? city,
    7. String? state,
    8. String? postalCode,
    9. String? country,
    10. bool? isSelected,
    )?
)

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(
          bool? isPrimary,
          String? fullAddress,
          String? addressId,
          String? line1,
          String? line2,
          String? city,
          String? state,
          String? postalCode,
          String? country,
          bool? isSelected)?
      $default,
) {
  final _that = this;
  switch (_that) {
    case _EPAddress() when $default != null:
      return $default(
          _that.isPrimary,
          _that.fullAddress,
          _that.addressId,
          _that.line1,
          _that.line2,
          _that.city,
          _that.state,
          _that.postalCode,
          _that.country,
          _that.isSelected);
    case _:
      return null;
  }
}