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, Map<String, dynamic> value, @BlobViewConverter() List<BlobView> blobs, @LabelConverter() List<Label>? labels, DateTime indexedAt, @ModerationDetailConverter() ModerationDetail moderation, @RepoViewConverter() RepoView repo, Map<String, dynamic>? $unknown) $default,) {final _that = this;
switch (_that) {
case _RecordViewDetail():
return $default(_that.$type,_that.uri,_that.cid,_that.value,_that.blobs,_that.labels,_that.indexedAt,_that.moderation,_that.repo,_that.$unknown);case _:
throw StateError('Unexpected subclass');
}
}