namespace System.Reactive.Linq.ObservableImpl { internal sealed class MinDecimal : Producer<decimal, MinDecimal._> { internal sealed class _ : Sink<decimal>, IObserver<decimal> { private bool _hasValue; private decimal _lastValue; public _(IObserver<decimal> observer, IDisposable cancel) : base(observer, cancel) { _hasValue = false; _lastValue = default(decimal); } public void OnNext(decimal value) { if (_hasValue) { if (value < _lastValue) _lastValue = value; } else { _lastValue = value; _hasValue = true; } } public void OnError(Exception error) { _observer.OnError(error); base.Dispose(); } public void OnCompleted() { if (!_hasValue) _observer.OnError(new InvalidOperationException(Strings_Linq.NO_ELEMENTS)); else { _observer.OnNext(_lastValue); _observer.OnCompleted(); } base.Dispose(); } } private readonly IObservable<decimal> _source; public MinDecimal(IObservable<decimal> source) { _source = source; } protected override _ CreateSink(IObserver<decimal> observer, IDisposable cancel) { return new _(observer, cancel); } protected override IDisposable Run(_ sink) { return _source.SubscribeSafe(sink); } } }