/// <summary>
/// Catches any errors in the source future and handles them with the specified handler.
/// If <paramref name="handler"/> throws an error the result will complete with that error.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="source">The source.</param>
/// <param name="handler">The handler.</param>
/// <returns>A result that will catch errors from <paramref name="source"/> with <paramref name="handler"/>.</returns>
public static Future <T> Catch <T>(this IFuture <T> source, Func <Exception, T> handler)
{
var result = new Future <T>();
source.OnComplete(() =>
{
if (source.Status == FutureStatus.Failure)
{
try
{
result.SetResult(handler(source.Error));
}
catch (Exception ex)
{
result.SetError(ex);
}
return;
}
source.CopyTo(result);
});
return(result);
}