ContinuationResultTaskFromTask.cs

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namespace System.Threading.Tasks;
 
internal sealed class ContinuationResultTaskFromTask<TResult> : Task<TResult>
{
    private Task m_antecedent;
 
    public ContinuationResultTaskFromTask(Task antecedent, Delegate function, object state, TaskCreationOptions creationOptions, InternalTaskOptions internalOptions)
        : base(function, state, Task.InternalCurrentIfAttached(creationOptions), default(CancellationToken), creationOptions, internalOptions, (TaskScheduler)null)
    {
        m_antecedent = antecedent;
    }
 
    internal override void InnerInvoke()
    {
        Task antecedent = m_antecedent;
        m_antecedent = null;
        antecedent.NotifyDebuggerOfWaitCompletionIfNecessary();
        if (m_action is Func<Task, TResult> func)
        {
            m_result = func(antecedent);
        }
        else if (m_action is Func<Task, object, TResult> func2)
        {
            m_result = func2(antecedent, m_stateObject);
        }
    }
}