public Logic(FirstOrDefault <TIn> stage) : base(stage.Shape)
{
_inlet = stage._in;
Action onPush = () =>
{
_promise.TrySetResult(Grab(_inlet));
CompleteStage();
};
Action onUpstreamFinish = () =>
{
if (stage._throwOnDefault)
{
_promise.TrySetException(new NoSuchElementException("First of empty stream"));
}
else
{
_promise.TrySetResult(default(TIn));
}
CompleteStage();
};
Action <Exception> onUpstreamFailure = e =>
{
_promise.TrySetException(e);
FailStage(e);
};
SetHandler(stage._in, onPush, onUpstreamFinish, onUpstreamFailure);
}
public Logic(FirstOrDefault <TIn> stage) : base(stage.Shape)
{
_stage = stage;
SetHandler(stage._in, this);
}