when<TResult extends Object?> method
- @optionalTypeArgs
A switch
-like method, using callbacks.
As opposed to map
, this offers destructuring.
It is equivalent to doing:
switch (sealedClass) {
case Subclass(:final field):
return ...;
case Subclass2(:final field2):
return ...;
}
Implementation
@optionalTypeArgs TResult when<TResult extends Object?>(TResult Function( String $type, @AtUriConverter() AtUri uri, String cid, String name, @ListPurposeConverter() ListPurpose purpose, String? avatar, int? listItemCount, @LabelConverter() List<Label>? labels, @ListViewerStateConverter() ListViewerState? viewer, DateTime? indexedAt, Map<String, dynamic>? $unknown) $default,) {final _that = this;
switch (_that) {
case _ListViewBasic():
return $default(_that.$type,_that.uri,_that.cid,_that.name,_that.purpose,_that.avatar,_that.listItemCount,_that.labels,_that.viewer,_that.indexedAt,_that.$unknown);case _:
throw StateError('Unexpected subclass');
}
}