using System.Reactive.Concurrency; namespace System.Reactive.Linq.ObservableImpl { internal sealed class Timestamp<TSource> : Producer<Timestamped<TSource>, Timestamp<TSource>._> { internal sealed class _ : Sink<TSource, Timestamped<TSource>> { private readonly IScheduler _scheduler; public _(IScheduler scheduler, IObserver<Timestamped<TSource>> observer) : base(observer) { _scheduler = scheduler; } public override void OnNext(TSource value) { ForwardOnNext(new Timestamped<TSource>(value, _scheduler.Now)); } } private readonly IObservable<TSource> _source; private readonly IScheduler _scheduler; public Timestamp(IObservable<TSource> source, IScheduler scheduler) { _source = source; _scheduler = scheduler; } protected override _ CreateSink(IObserver<Timestamped<TSource>> observer) { return new _(_scheduler, observer); } protected override void Run(_ sink) { sink.Run(_source); } } }