private IntrusiveCollection.Element RemoveElement(IntrusiveCollection.Element elem
)
{
IntrusiveCollection.Element prev = elem.GetPrev(this);
IntrusiveCollection.Element next = elem.GetNext(this);
elem.RemoveInternal(this);
prev.SetNext(this, next);
next.SetPrev(this, prev);
size--;
return(next);
}
/// <summary>Add an element to the front of the list.</summary>
/// <param name="elem">The new element to add.</param>
public virtual bool AddFirst(IntrusiveCollection.Element elem)
{
if (elem == null)
{
return(false);
}
if (elem.IsInList(this))
{
return(false);
}
IntrusiveCollection.Element next = root.GetNext(this);
next.SetPrev(this, elem);
root.SetNext(this, elem);
elem.InsertInternal(this, root, next);
size++;
return(true);
}
/// <summary>Add an element to the end of the list.</summary>
/// <param name="elem">The new element to add.</param>
public virtual bool AddItem(E elem)
{
if (elem == null)
{
return(false);
}
if (elem.IsInList(this))
{
return(false);
}
IntrusiveCollection.Element prev = root.GetPrev(this);
prev.SetNext(this, elem);
root.SetPrev(this, elem);
elem.InsertInternal(this, prev, root);
size++;
return(true);
}