internal static Stream <T> SwitchSImpl <T, T2>(this Behavior <T2> bsa) where T2 : Stream <T> { return(TransactionInternal.Apply( (trans1, _) => { Stream <T> @out = new Stream <T>(bsa.KeepListenersAlive); MutableListener currentListener = new MutableListener(); void HInitial(TransactionInternal trans2, Stream <T> sa) { IListener cl = currentListener; cl.Unlisten(); currentListener.SetListenerImpl(sa.Listen(@out.Node, trans2, @out.Send, false)); } void H(TransactionInternal trans2, Stream <T> sa) { trans2.Last( () => { IListener cl = currentListener; cl.Unlisten(); currentListener.SetListenerImpl(sa.Listen(@out.Node, trans2, @out.Send, true)); }); } trans1.Prioritized(new Node <T>(), trans2 => HInitial(trans2, bsa.SampleNoTransaction())); IListener l1 = bsa.Updates().Listen(new Node <T>(), trans1, H, false); return @out.UnsafeAttachListener(l1).UnsafeAttachListener(currentListener); }, false)); }
internal Stream <TResult> SnapshotImpl <T1, T2, TResult>(Behavior <T1> b1, Behavior <T2> b2, Func <T, T1, T2, TResult> f) { Stream <TResult> @out = new Stream <TResult>(this.KeepListenersAlive); IListener l = this.Listen( @out.Node, (trans2, a) => @out.Send(trans2, f(a, b1.SampleNoTransaction(), b2.SampleNoTransaction()))); return(@out.UnsafeAttachListener(l)); }