whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  1. TResult? $default(
    1. String $type,
    2. AtUri uri,
    3. String cid,
    4. ProfileViewBasic author,
    5. Map<String, dynamic> record,
    6. UPostViewEmbed? embed,
    7. int? bookmarkCount,
    8. int? replyCount,
    9. int? repostCount,
    10. int? likeCount,
    11. int? quoteCount,
    12. DateTime indexedAt,
    13. ViewerState? viewer,
    14. List<Label>? labels,
    15. ThreadgateView? threadgate,
    16. Map<String, dynamic>? $unknown,
    )?
)

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 $type, @AtUriConverter()  AtUri uri,  String cid, @ProfileViewBasicConverter()  ProfileViewBasic author,  Map<String, dynamic> record, @UPostViewEmbedConverter()  UPostViewEmbed? embed,  int? bookmarkCount,  int? replyCount,  int? repostCount,  int? likeCount,  int? quoteCount,  DateTime indexedAt, @ViewerStateConverter()  ViewerState? viewer, @LabelConverter()  List<Label>? labels, @ThreadgateViewConverter()  ThreadgateView? threadgate,  Map<String, dynamic>? $unknown)?  $default,) {final _that = this;
switch (_that) {
case _PostView() when $default != null:
return $default(_that.$type,_that.uri,_that.cid,_that.author,_that.record,_that.embed,_that.bookmarkCount,_that.replyCount,_that.repostCount,_that.likeCount,_that.quoteCount,_that.indexedAt,_that.viewer,_that.labels,_that.threadgate,_that.$unknown);case _:
  return null;

}
}