when<TResult extends Object?> method
- @optionalTypeArgs
- required TResult listViewBasic(
- ListViewBasic data
- required TResult listView(
- ListView data
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?>({required TResult Function( ListViewBasic data) listViewBasic,required TResult Function( ListView data) listView,}) {final _that = this;
switch (_that) {
case UModerationSubjectUserListListViewBasic():
return listViewBasic(_that.data);case UModerationSubjectUserListListView():
return listView(_that.data);case _:
throw StateError('Unexpected subclass');
}
}