public async ValueTask <bool> MoveNextAsync()
{
if (_done)
{
var ex = ExceptionHelper.Terminate(ref _error);
if (ex != null)
{
throw ex;
}
return(false);
}
for (; ;)
{
var success = _queue.TryDequeue(out var entry);
if (success)
{
var b = _buffer;
if (entry.Done)
{
_done = true;
if (b != null)
{
Current = b;
_buffer = default;
return(true);
}
var ex = ExceptionHelper.Terminate(ref _error);
if (ex != null)
{
throw ex;
}
return(false);
}
if (entry.Boundary)
{
if (b == null)
{
Current = _collectionSupplier();
}
else
{
Current = b;
_buffer = default;
}
_size = 0;
MoveNextOther();
return(true);
}
if (b == null)
{
b = _collectionSupplier();
_buffer = b;
}
b.Add(entry.Value);
if (++_size == _maxSize)
{
Current = b;
_buffer = default;
_size = 0;
MoveNextSource();
return(true);
}
MoveNextSource();
continue;
}
await ResumeHelper.Await(ref _resume);
ResumeHelper.Clear(ref _resume);
}
}