Re: Ada.Containers.Doubly_Linked_Lists

["Jeffrey R. Carter" <jrcarter@acm.org>]

Carroll, Andrew wrote:
>  
> Okay, so, just out of curiosity, what do I do if I need the Node_type 
> within Ada.Containers.Doubly_Linked_Lists to have an additional 
> "attribute"?  So instead of just having
>  
> type Node_Type is limited record
>  Element : Element_Access;
>  Next : Node_Access;
>  Prev : Node_Access;
> end record;

There is nothing named Node_Type in Ada.Containers.Doubly_Linked_Lists. 
See ARM-0X A.18.3 for the definition of this generic package:

http://www.adaic.org/standards/05rm/html/RM-A-18-3.html

An implementation may have something named Node_Type, but that would not 
be in the visible part of the specification, and so unavailable to you 
as a client of the generic or instantiations of it. Another 
implementation may be completely different, so relying on information 
about the implementation would be completely non-portable.

-- 
Jeff Carter
"Now go away or I shall taunt you a second time."
Monty Python & the Holy Grail
07