/// <summary>
/// Catch an exception emitted from the previous observables or operators
/// and perform an action with it. This will only catch the exception if it is
/// an instance of the declared exception type.
/// </summary>
/// <typeparam name="TSource">The type of the value.</typeparam>
/// <typeparam name="TException">The exception type.</typeparam>
/// <param name="observable">The parent observable.</param>
/// <param name="action">The action to be performed.</param>
/// <returns>An instance of <see cref="IProviderObservable{TSource}"/>.</returns>
public static IProviderObservable <TSource> Catch <TSource, TException>(
this IProviderObservable <TSource> observable,
Action <TException> action)
where TException : Exception =>
observable.Catch((TException exception) =>
{
action(exception);
return(Observable.Throw <TSource>(exception, observable.ServiceProvider));
});
/// <summary>
/// Catch an exception emitted from the previous observables or operators
/// and perform an action with it.
/// </summary>
/// <typeparam name="TSource">The type of the value.</typeparam>
/// <param name="observable">The parent observable.</param>
/// <param name="action">The action to be performed.</param>
/// <returns>An instance of <see cref="IProviderObservable{TSource}"/>.</returns>
public static IProviderObservable <TSource> Catch <TSource>(
this IProviderObservable <TSource> observable,
Action <Exception> action) =>
observable.Catch <TSource, Exception>(action);
/// <summary>
/// Catch an exception emitted from the previous observables or operators
/// and return a new observable.
/// </summary>
/// <typeparam name="TSource">The type of the value.</typeparam>
/// <param name="observable">The parent observable.</param>
/// <param name="handler">The function to handle the exception.</param>
/// <returns>An instance of <see cref="IProviderObservable{TSource}"/>.</returns>
public static IProviderObservable <TSource> Catch <TSource>(
this IProviderObservable <TSource> observable,
Func <Exception, IProviderObservable <TSource> > handler) =>
observable.Catch <TSource, Exception>(handler);
