public Logic(LastOrDefault <TIn> stage) : base(stage.Shape)
{
_inlet = stage._in;
Action onPush = () =>
{
_prev = Grab(_inlet);
_foundAtLeastOne = true;
Pull(_inlet);
};
Action onUpstreamFinish = () =>
{
if (stage._throwOnDefault && !_foundAtLeastOne)
{
_promise.TrySetException(new NoSuchElementException("Last of empty stream"));
}
else
{
_promise.TrySetResult(_prev);
}
CompleteStage();
};
Action <Exception> onUpstreamFailure = e =>
{
_promise.TrySetException(e);
FailStage(e);
};
SetHandler(stage._in, onPush, onUpstreamFinish, onUpstreamFailure);
}
public Logic(LastOrDefault <TIn> stage) : base(stage.Shape)
{
_stage = stage;
SetHandler(stage._in, this);
}
