/// <summary>
/// Create an enumerator on a linked list.
/// </summary>
/// <param name="head">
/// The head node for the list.
/// </param>
public LinkedListEnumerator(IListHead head)
{
#region Assert
Debug.Assert(
head != null,
"Null list header",
"A null list header was passed to the constructor."
);
Debug.Assert(
head.Next != null && head.Previous != null,
"Null head reference",
"The list header contains a null reference."
);
#endregion
this.head = head as ListNode;
if (this.head == null)
{
throw new InvalidOperationException();
}
this.list = head.Value as LinkedList;
this.list.isIterating = true;
this.node = this.head.next.previous;
}
/// <summary>
/// Create a node enumerator on a linked list that will
/// start at the specified index.
/// </summary>
public NodeEnumerator(IListHead head, int index) : base(head, index)
{
}
/// <summary>
/// Create a node enumerator on a linked list.
/// </summary>
public NodeEnumerator(IListHead head) : base(head)
{
}
/// <summary>
/// Create an enumerator on a linked list that will
/// start at the specified index.
/// </summary>
/// <param name="head">
/// Head node for the list.
/// </param>
/// <param name="index">
/// Position to which the enumerator will advance.
/// </param>
public LinkedListEnumerator(IListHead head, int index)
: this(head)
{
this.MoveTo(index);
}
/// <summary>
/// Create a node enumerator on a linked list that will
/// start at the specified index.
/// </summary>
public LinkedListIterator(IListHead head, int index) : base(head, index)
{
}
/// <summary>
/// Create a node enumerator on a linked list.
/// </summary>
public LinkedListIterator(IListHead head) : base(head)
{
}
