/// <summary>
/// Creates an enumerator that iterates through a collection asynchronously
/// </summary>
/// <param name="cancellationToken">A cancellation token to cancel creation of the enumerator in case if it takes a lot of time</param>
/// <returns>Returns a task with the created enumerator as result on completion</returns>
Task <IAsyncEnumerator> IAsyncEnumerable.GetAsyncEnumeratorAsync(CancellationToken cancellationToken)
{
var enumerator = new AsyncEnumeratorWithState <TItem, TState>(_enumerationFunction, State);
return(Task.FromResult <IAsyncEnumerator>(enumerator));
}
/// <summary>
/// Creates an enumerator that iterates through a collection asynchronously
/// </summary>
/// <param name="cancellationToken">A cancellation token to cancel creation of the enumerator in case if it takes a lot of time</param>
/// <returns>Returns a task with the created enumerator as result on completion</returns>
public virtual Task <IAsyncEnumerator <TItem> > GetAsyncEnumeratorAsync(CancellationToken cancellationToken = default(CancellationToken))
{
var enumerator = new AsyncEnumeratorWithState <TItem, TState>(_enumerationFunction, State);
return(Task.FromResult <IAsyncEnumerator <TItem> >(enumerator));
}