Doubly linked list (again, sorry)

["Matt Tyler" <matt_tyler@hotmail.com>]

Hello.

I have created a doubly linked list. With the procedure (body only)

List:=new cell'(V,Next=>, Prev=>null);

V=integer and prev,next are access types to next and previous cells in list.

I want to loop through the list in both directions. I can loop in the
reverse order to creation using a loop containing:

L:=L.Next;       (where L is also an access type to cell)

To loop from start of list do I need to create a (say) Start_of_list access
type to the first cell in the list or is there a more elegant way that I am
missing.

Also, when I remove (to delete) a record from the list do I have to
de-allocate the memory occupied by the object or is it done for me.

I am sorry to waste your time but I am having a few problems with access
types. Thanks in advance

Matt Tyler