private async Task HandleSource(Task <bool> t)
{
if (t.IsFaulted)
{
if (TryDisposeSource())
{
await _subject.Error(ExceptionHelper.Extract(t.Exception));
}
}
else if (t.Result)
{
var v = _source.Current;
if (TryDisposeSource())
{
await _subject.Next(v);
MoveNextSource();
}
}
else
{
if (TryDisposeSource())
{
await _subject.Complete();
}
}
}
public static async ValueTask Consume <T>(this IAsyncEnumerable <T> source, IAsyncConsumer <T> consumer, CancellationToken ct)
{
var en = source.GetAsyncEnumerator();
try
{
if (!ct.IsCancellationRequested)
{
try
{
while (await en.MoveNextAsync())
{
if (ct.IsCancellationRequested)
{
return;
}
await consumer.Next(en.Current);
}
await consumer.Complete();
}
catch (Exception ex)
{
await consumer.Error(ex);
}
}
}
finally
{
await en.DisposeAsync();
}
}
private static async void FillQueue <T>(IAsyncEnumerable <T> source, IAsyncConsumer <T> queue,
CancellationToken cancellationToken = default)
{
try
{
await foreach (var item in source.WithCancellation(cancellationToken))
{
await queue.Next(item);
}
}
catch (Exception e)
{
await queue.Error(e);
}
finally
{
await queue.Complete();
}
}