45 lines
1.4 KiB
C#
45 lines
1.4 KiB
C#
// Licensed to the .NET Foundation under one or more agreements.
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// The .NET Foundation licenses this file to you under the MIT License.
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// See the LICENSE file in the project root for more information.
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namespace System.Reactive.Linq.ObservableImpl
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{
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internal sealed class Cast<TSource, TResult> : Producer<TResult, Cast<TSource, TResult>._> /* Could optimize further by deriving from Select<TResult> and providing Combine<TResult2>. We're not doing this (yet) for debuggability. */
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{
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private readonly IObservable<TSource> _source;
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public Cast(IObservable<TSource> source)
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{
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_source = source;
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}
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protected override _ CreateSink(IObserver<TResult> observer) => new(observer);
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protected override void Run(_ sink) => sink.Run(_source);
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internal sealed class _ : Sink<TSource, TResult>
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{
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public _(IObserver<TResult> observer)
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: base(observer)
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{
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}
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public override void OnNext(TSource value)
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{
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TResult? result;
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try
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{
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result = (TResult?)(object?)value;
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}
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catch (Exception exception)
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{
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ForwardOnError(exception);
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return;
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}
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ForwardOnNext(result!);
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}
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}
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}
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}
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