whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  1. TResult? $default(
    1. String? id,
    2. Name? username,
    3. PhoneNumber? primaryPhoneNumber,
    4. EmailAddress? primaryEmailAddress,
    5. List<PhoneNumber>? secondaryPhoneNumbers,
    6. List<EmailAddress>? secondaryEmailAddresses,
    7. bool? termsAccepted,
    8. bool? suspended,
    9. String? photoUploadID,
    10. List<Cover?>? covers,
    11. BioData? userBioData,
    12. Address? homeAddress,
    13. Address? workAddress,
    14. String? referralLink,
    15. Assistant? assistant,
    )?
)

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(
          @JsonKey(name: 'id') String? id,
          @JsonKey(name: 'userName') Name? username,
          @JsonKey(name: 'primaryPhone') PhoneNumber? primaryPhoneNumber,
          @JsonKey(name: 'primaryEmailAddress')
          EmailAddress? primaryEmailAddress,
          @JsonKey(name: 'secondaryPhoneNumbers')
          List<PhoneNumber>? secondaryPhoneNumbers,
          @JsonKey(name: 'secondaryEmailAddresses')
          List<EmailAddress>? secondaryEmailAddresses,
          @JsonKey(name: 'terms_accepted') bool? termsAccepted,
          @JsonKey(name: 'suspended') bool? suspended,
          @JsonKey(name: 'photoUploadID') String? photoUploadID,
          @JsonKey(name: 'covers') List<Cover?>? covers,
          @JsonKey(name: 'userBioData') BioData? userBioData,
          @JsonKey(name: 'homeAddress') Address? homeAddress,
          @JsonKey(name: 'workAddress') Address? workAddress,
          @JsonKey(name: 'referralLink') String? referralLink,
          @JsonKey(name: 'assistant', unknownEnumValue: Assistant.BEV)
          Assistant? assistant)?
      $default,
) {
  final _that = this;
  switch (_that) {
    case _UserProfile() when $default != null:
      return $default(
          _that.id,
          _that.username,
          _that.primaryPhoneNumber,
          _that.primaryEmailAddress,
          _that.secondaryPhoneNumbers,
          _that.secondaryEmailAddresses,
          _that.termsAccepted,
          _that.suspended,
          _that.photoUploadID,
          _that.covers,
          _that.userBioData,
          _that.homeAddress,
          _that.workAddress,
          _that.referralLink,
          _that.assistant);
    case _:
      return null;
  }
}