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// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
#if HAS_AWAIT
using System.Threading;
using System.Reactive.Disposables;
using System.Reactive.Subjects;
namespace System.Reactive.Linq
{
public static partial class Observable
{
/// <summary>
/// Gets an awaiter that returns the last value of the observable sequence or throws an exception if the sequence is empty.
/// This operation subscribes to the observable sequence, making it hot.
/// </summary>
/// <typeparam name="TSource">The type of the elements in the source sequence.</typeparam>
/// <param name="source">Source sequence to await.</param>
/// <returns>Object that can be awaited.</returns>
/// <exception cref="ArgumentNullException"><paramref name="source"/> is null.</exception>
public static AsyncSubject<TSource> GetAwaiter<TSource>(this IObservable<TSource> source)
{
if (source == null)
throw new ArgumentNullException("source");
return s_impl.GetAwaiter<TSource>(source);
}
/// <summary>
/// Gets an awaiter that returns the last value of the observable sequence or throws an exception if the sequence is empty.
/// This operation subscribes and connects to the observable sequence, making it hot.
/// </summary>
/// <typeparam name="TSource">The type of the elements in the source sequence.</typeparam>
/// <param name="source">Source sequence to await.</param>
/// <returns>Object that can be awaited.</returns>
/// <exception cref="ArgumentNullException"><paramref name="source"/> is null.</exception>
public static AsyncSubject<TSource> GetAwaiter<TSource>(this IConnectableObservable<TSource> source)
{
if (source == null)
throw new ArgumentNullException("source");
return s_impl.GetAwaiter<TSource>(source);
}
/// <summary>
/// Gets an awaiter that returns the last value of the observable sequence or throws an exception if the sequence is empty.
/// This operation subscribes to the observable sequence, making it hot. The supplied CancellationToken can be used to cancel the subscription.
/// </summary>
/// <typeparam name="TSource">The type of the elements in the source sequence.</typeparam>
/// <param name="source">Source sequence to await.</param>
/// <param name="cancellationToken">Cancellation token.</param>
/// <returns>Object that can be awaited.</returns>
/// <exception cref="ArgumentNullException"><paramref name="source"/> is null.</exception>
public static AsyncSubject<TSource> RunAsync<TSource>(this IObservable<TSource> source, CancellationToken cancellationToken)
{
if (source == null)
throw new ArgumentNullException("source");
return s_impl.RunAsync<TSource>(source, cancellationToken);
}
/// <summary>
/// Gets an awaiter that returns the last value of the observable sequence or throws an exception if the sequence is empty.
/// This operation subscribes and connects to the observable sequence, making it hot. The supplied CancellationToken can be used to cancel the subscription and connection.
/// </summary>
/// <typeparam name="TSource">The type of the elements in the source sequence.</typeparam>
/// <param name="source">Source sequence to await.</param>
/// <param name="cancellationToken">Cancellation token.</param>
/// <returns>Object that can be awaited.</returns>
/// <exception cref="ArgumentNullException"><paramref name="source"/> is null.</exception>
public static AsyncSubject<TSource> RunAsync<TSource>(this IConnectableObservable<TSource> source, CancellationToken cancellationToken)
{
if (source == null)
throw new ArgumentNullException("source");
return s_impl.RunAsync<TSource>(source, cancellationToken);
}
}
}
#endif
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