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From: "Matt Tyler" <matt_tyler@hotmail.com>
Subject: Doubly linked list (again, sorry)
Date: 1998/12/16
Message-ID: <7580p3$q00@romeo.logica.co.uk>#1/1
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Organization: Logica UK Limited
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Newsgroups: comp.lang.ada
Date: 1998-12-16T00:00:00+00:00
List-Id: <comp.lang.ada>

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