private void EnumerateSteps()
{
if (base.Task.IsCompleted)
{
return;
}
if (!this.steps.MoveNext())
{
this.StepsComplete();
return;
}
this.currentStep = this.steps.Current;
this.currentStep.Task.ContinueWith((System.Threading.Tasks.Task t) => {
if (t.IsCanceled)
{
if (this.currentStep.Policy == IteratorTask <TResult> .ExceptionPolicy.Transfer)
{
base.TrySetCanceled();
this.StepsComplete();
}
return;
}
if (t.IsFaulted && this.currentStep.Policy == IteratorTask <TResult> .ExceptionPolicy.Transfer)
{
this.DoSetException(t.Exception.GetBaseException());
this.StepsComplete();
return;
}
try
{
this.EnumerateSteps();
}
catch (Exception exception1)
{
Exception exception = exception1;
if (Fx.IsFatal(exception))
{
throw;
}
this.DoSetException(exception);
}
}, TaskContinuationOptions.ExecuteSynchronously);
}
protected IteratorTask <TResult> .TaskStep CallTask(System.Threading.Tasks.Task task, IteratorTask <TResult> .ExceptionPolicy policy = 0)
{
return(new IteratorTask <TResult> .TaskStep(task, policy));
}
protected IteratorTask <TResult> .TaskStep CallTask <TState>(Func <TState, System.Threading.Tasks.Task> taskFunc, TState state, IteratorTask <TResult> .ExceptionPolicy policy = 0)
{
System.Threading.Tasks.Task task;
if (policy != IteratorTask <TResult> .ExceptionPolicy.Continue)
{
task = taskFunc(state);
}
else
{
try
{
task = taskFunc(state);
}
catch (Exception exception1)
{
Exception exception = exception1;
if (Fx.IsFatal(exception))
{
throw;
}
TaskCompletionSource <object> taskCompletionSource = new TaskCompletionSource <object>();
taskCompletionSource.SetException(exception);
task = taskCompletionSource.Task;
}
}
return(new IteratorTask <TResult> .TaskStep(task, policy));
}
public TaskStep(System.Threading.Tasks.Task task, IteratorTask <TResult> .ExceptionPolicy policy)
{
this.task = task;
this.policy = policy;
}