From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Subject: Re: Ada 2005,Doubly_Linked_List with Controlled parameter
Date: Tue, 5 Apr 2016 10:50:03 +0200
Date: 2016-04-05T10:50:03+02:00 [thread overview]
Message-ID: <ndvu8i$ndc$1@gioia.aioe.org> (raw)
In-Reply-To: 8fdba7bf-86a5-4d6e-b212-c670d3fdf9f9@googlegroups.com
On 05/04/2016 10:35, George J wrote:
> ....
>> Or, better, since you never change Name or Surname:
>>
>> type Info_Record
>> (Name_Length : Positive; Surname_Length : Positive) is
>> record
>> Name : String (1..Name_Length);
>> Surname : String (1..Surname_Length);
>> Age : Natural;
>> end Info_Record;
>>
>> --
>> Regards,
>> Dmitry A. Kazakov
>> http://www.dmitry-kazakov.de
>
> I do it this way, and I have to change Doubly_Linked_List(Info_Record) to
> Indefinite_DoublY_Linked(Info_Record) cause of error:"unconstrained
> subtype in component declaration". Am I right?
I am not familiar with the design of standard container's doubly-linked
lists. Normally, a list always deals with limited indefinite elements.
Otherwise, it does not make much sense.
> Or may be it's any way to
> use Doubly_Linked_List? And,BTW, I'm afraid of using Indefinite List
> cause I think,that it can request much more memory, than
> Doubly_C_L,isn't it?
As I said, I don't know how it is designed. There are many ways to
design a list. One is that elements are derived from linked base
elements. Another is that links are allocated outside and point to the
elements. A better variant of the latter is to use a custom storage pool
and put links before the elements. In all three methods there is no
overhead of having elements limited indefinite.
--
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de
next prev parent reply other threads:[~2016-04-05 8:50 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-05 2:03 Ada 2005,Doubly_Linked_List with Controlled parameter George J
2016-04-05 2:27 ` Jeffrey R. Carter
2016-04-05 3:00 ` George J
2016-04-05 4:13 ` George J
2016-04-05 6:20 ` Jeffrey R. Carter
2016-04-05 6:31 ` George J
2016-04-05 7:58 ` Dmitry A. Kazakov
2016-04-05 8:09 ` George J
2016-04-05 8:35 ` George J
2016-04-05 8:50 ` Dmitry A. Kazakov [this message]
2016-04-05 8:57 ` George J
2016-04-05 16:22 ` Jeffrey R. Carter
2016-04-06 1:14 ` George J
2016-04-05 3:25 ` George J
2016-04-05 5:24 ` Jeffrey R. Carter
2016-04-05 6:30 ` George J
2016-04-06 20:29 ` Randy Brukardt
2016-04-06 21:04 ` Jeffrey R. Carter
2016-04-07 1:28 ` George J
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