/// <summary>
/// Propagates the completion state of <paramref name="task"/> (<see cref="TaskStatus.Canceled"/>, <see cref="TaskStatus.Faulted"/>,
/// or <see cref="TaskStatus.RanToCompletion"/>) to the given <paramref name="taskCompletionSource"/>, optionally using
/// <paramref name="resultFactory"/> to generate a <typeparamref name="TResult"/> value (otherwise the default <typeparamref name="TResult"/>
/// value is used. Returns the input <paramref name="taskCompletionSource"/>
/// </summary>
public static TaskCompletionSource <TResult> CompleteWith <TResult>(this TaskCompletionSource <TResult> taskCompletionSource, Task task, Func <TResult> resultFactory = null)
{
var continuationOptions = resultFactory == null
? TaskContinuationOptions.ExecuteSynchronously
: TaskContinuationOptions.None;
return(taskCompletionSource.InternalCompleteWith(task, (_, state) => state != null ? ((Func <TResult>)state)() : default(TResult), resultFactoryState: resultFactory, continuationOptions: continuationOptions));
}
/// <summary>
/// Propagates the completion state of <paramref name="task"/> (<see cref="TaskStatus.Canceled"/>, <see cref="TaskStatus.Faulted"/>,
/// or <see cref="TaskStatus.RanToCompletion"/>) to the given <paramref name="taskCompletionSource"/>, using <paramref name="resultFactory"/>
/// to generate a <typeparamref name="TResult"/> value from the given <paramref name="task"/>'s result. Returns the input
/// <paramref name="taskCompletionSource"/>
/// </summary>
public static TaskCompletionSource <TResult> CompleteWith <TResult, TTaskResult>(this TaskCompletionSource <TResult> taskCompletionSource, Task <TTaskResult> task, Func <TTaskResult, TResult> resultFactory)
{
if (resultFactory == null)
{
throw new ArgumentNullException(nameof(resultFactory));
}
return(taskCompletionSource.InternalCompleteWith(task, (t, state) => ((Func <TTaskResult, TResult>)state)(t.Result), resultFactoryState: resultFactory));
}
/// <summary>
/// Propagates the completion state of <paramref name="task"/> (<see cref="TaskStatus.Canceled"/>, <see cref="TaskStatus.Faulted"/>,
/// or <see cref="TaskStatus.RanToCompletion"/>) to the given <paramref name="taskCompletionSource"/>. Returns the input
/// <paramref name="taskCompletionSource"/>
/// </summary>
public static TaskCompletionSource <TResult> CompleteWith <TResult>(this TaskCompletionSource <TResult> taskCompletionSource, Task <TResult> task)
{
return(taskCompletionSource.InternalCompleteWith(task, (t, _) => t.Result, resultFactoryState: null, continuationOptions: TaskContinuationOptions.ExecuteSynchronously));
}
