/// <summary>Advances to the next element in the flattened enumerable. Enumerables that contain no elements are automatically skipped.</summary>
/// <returns><see langword="true"/> if the enumerator advanced to the next element, otherwise <see langword="false"/> if there were no remaining elements to enumerate.</returns>
public bool MoveNext()
{
while (innerFlattenedEnumerator?.MoveNext() != true)
{
if (!outerEnumerator.MoveNext())
{
return(false);
}
innerFlattenedEnumerator = new(outerEnumerator.Current.GetEnumerator());
}
current = innerFlattenedEnumerator.Current;
return(true);
}
/// <summary>Initializes a new instance of the <seealso cref="Enumerator"/> class out of a <seealso cref="FlattenedEnumerables2D{T}"/> instance.</summary>
/// <param name="instance">The <seealso cref="FlattenedEnumerables2D{T}"/> whose enumerables will be flattened.</param>
public Enumerator(FlattenedEnumerables2D <T> instance)
{
outerEnumerator = instance.enumerables.GetEnumerator();
}
/// <inheritdoc/>
public void Reset()
{
outerEnumerator.Reset();
innerFlattenedEnumerator = null;
}