public override void handleNext(_EventDispatch <T> dispatch)
{
if (_iterator == null)
{
throw new Exception("No events pending.");
}
bool?hasMore = null;
try {
hasMore = _iterator.MoveNext();
if (hasMore ?? false)
{
dispatch._sendData(_iterator.Current);
}
else
{
_iterator = null;
dispatch._sendDone();
}
}
catch (Exception e) {
if (hasMore == null)
{
// Threw in .moveNext().
// Ensure that we send a done afterwards.
_iterator = Enumerable.Empty <T>().GetEnumerator(); // new EmptyIterator<Null>();
dispatch._sendError(e, e.StackTrace);
}
else
{
// Threw in .current.
dispatch._sendError(e, e.StackTrace);
}
}
}
public override void perform(_EventDispatch <T> dispatch)
{
dispatch._sendData(value);
}