/// <summary>
/// Returns the iterator pointing to the first item greater than <paramref name="item"/>.
/// </summary>
public RedBlackTreeIterator <T> UpperBound(T item)
{
RedBlackTreeIterator <T> it = LowerBound(item);
while (it.IsValid && host.Compare(it.Current, item) == 0)
{
it.MoveNext();
}
return(it);
}
/// <summary>
/// Returns the iterator pointing to the specified item, or an iterator in End state if the item is not found.
/// </summary>
public RedBlackTreeIterator <T> Find(T item)
{
RedBlackTreeIterator <T> it = LowerBound(item);
while (it.IsValid && host.Compare(it.Current, item) == 0)
{
if (host.Equals(it.Current, item))
{
return(it);
}
it.MoveNext();
}
return(default(RedBlackTreeIterator <T>));
}