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From: ytomino <aghia05@gmail.com>
Newsgroups: comp.lang.ada
Subject: Is Storage Subpool Example tested?
Date: Wed, 25 Apr 2012 14:18:14 -0700 (PDT)
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Date: 2012-04-25T14:18:14-07:00
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Hello.

I'm trying to compile http://ada-auth.org/standards/12rm/html/RM-13-11-6.html , but there are some errors.

Perhaps, 

1. "use type System.Storage_Pools.Subpools.Subpool_Handle;" is missing.

2. 2nd parameter of Set_Pool_of_Subpool is "in out", but access value is given.

3. Downcast as MR_Subpool is missing in
> Result.Start := Pool.Next_Allocation;

4. ".Start" is missing in
> Pool.Next_Allocation := Pool.Markers(Pool.Current_Pool);

(And, I had to replace some 'Unchecked_Access to 'Unrestricted_Access, but this is GNAT's feature. I don't care it.)

BTW, Do you have a interesting idea to use subpools?
For instance, I like Matthew Heaney's System.Initialization. ( http://www.ada-auth.org/cgi-bin/cvsweb.cgi/ai05s/ai05-0001-1.txt?rev=1.17 )
It seems to be able to implement by user with subpool.

 P := System.Initialization.New_Object (Storage);

is able to be rewritten like below

 P := new (Make_Subpool_Using_Given_Address (Storage'Address)) Object_Type;

However, Delete_Object is difficult. :-)