public override void Subscribe(IFlowableSubscriber <R> subscriber)
{
var s = sources;
var a = new IPublisher <T> [8];
int n = 0;
try
{
foreach (var p in sources)
{
if (p == null)
{
throw new NullReferenceException("One of the source IPublishers is null");
}
if (n == a.Length)
{
var b = new IPublisher <T> [n + (n >> 2)];
Array.Copy(a, 0, b, 0, n);
a = b;
}
a[n++] = p;
}
}
catch (Exception ex)
{
subscriber.OnSubscribe(EmptySubscription <T> .Instance);
subscriber.OnError(ex);
return;
}
if (n == 0)
{
subscriber.OnSubscribe(EmptySubscription <T> .Instance);
subscriber.OnComplete();
return;
}
if (n == 1)
{
Flowable.FromPublisher(a[0]).Map(v => combiner(new T[] { v })).Subscribe(subscriber);
return;
}
var parent = new FlowableCombineLatest <T, R> .CombineLatestSubscription(subscriber, combiner, n, prefetch);
subscriber.OnSubscribe(parent);
parent.Subscribe(a);
}