97 lines
3.2 KiB
C#
97 lines
3.2 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 static class Select<TSource, TResult>
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{
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internal sealed class Selector : Producer<TResult, Selector._>
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{
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private readonly IObservable<TSource> _source;
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private readonly Func<TSource, TResult> _selector;
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public Selector(IObservable<TSource> source, Func<TSource, TResult> selector)
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{
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_source = source;
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_selector = selector;
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}
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protected override _ CreateSink(IObserver<TResult> observer) => new(_selector, 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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private readonly Func<TSource, TResult> _selector;
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public _(Func<TSource, TResult> selector, IObserver<TResult> observer)
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: base(observer)
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{
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_selector = selector;
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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 = _selector(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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internal sealed class SelectorIndexed : Producer<TResult, SelectorIndexed._>
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{
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private readonly IObservable<TSource> _source;
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private readonly Func<TSource, int, TResult> _selector;
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public SelectorIndexed(IObservable<TSource> source, Func<TSource, int, TResult> selector)
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{
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_source = source;
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_selector = selector;
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}
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protected override _ CreateSink(IObserver<TResult> observer) => new(_selector, 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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private readonly Func<TSource, int, TResult> _selector;
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private int _index;
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public _(Func<TSource, int, TResult> selector, IObserver<TResult> observer)
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: base(observer)
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{
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_selector = selector;
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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 = _selector(value, checked(_index++));
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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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}
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