using System.Runtime.CompilerServices; namespace System.Reactive.Linq.ObservableImpl { [System.Runtime.CompilerServices.NullableContext(1)] [System.Runtime.CompilerServices.Nullable(new byte[] { 0, 2, 1, 1 })] internal sealed class ElementAtOrDefault<[System.Runtime.CompilerServices.Nullable(2)] TSource> : Producer<TSource, ElementAtOrDefault<TSource>._> { [System.Runtime.CompilerServices.Nullable(new byte[] { 0, 1, 2 })] internal sealed class _ : Sink<TSource, TSource> { private int _i; public _(int index, [System.Runtime.CompilerServices.Nullable(new byte[] { 1, 2 })] IObserver<TSource> observer) : base(observer) { _i = index; } public override void OnNext(TSource value) { if (_i == 0) { ForwardOnNext(value); ForwardOnCompleted(); } _i--; } public override void OnCompleted() { ForwardOnNext(default(TSource)); ForwardOnCompleted(); } } private readonly IObservable<TSource> _source; private readonly int _index; public ElementAtOrDefault(IObservable<TSource> source, int index) { _source = source; _index = index; } [return: System.Runtime.CompilerServices.Nullable(new byte[] { 1, 0 })] protected override _ CreateSink([System.Runtime.CompilerServices.Nullable(new byte[] { 1, 2 })] IObserver<TSource> observer) { return new _(_index, observer); } protected override void Run([System.Runtime.CompilerServices.Nullable(new byte[] { 1, 0 })] _ sink) { sink.Run(_source); } } }