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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Newsgroups: comp.lang.ada
Subject: Re: Emulating placement new
Date: Sun, 29 Jul 2012 16:25:22 +0200
Organization: cbb software GmbH
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Date: 2012-07-29T16:25:22+02:00
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On Sun, 29 Jul 2012 16:15:01 +0200, Florian Weimer wrote:

> * Dmitry A. Kazakov:
> 
>> On Sun, 29 Jul 2012 15:56:27 +0200, Florian Weimer wrote:
>>
>>> Is there a way to specify a storage pool (or something similar) on the
>>> allocator, and not on the access type?
> 
>> Maybe something like this:
>>
>>    function Allocate_In (Pool : in out Root_Storage_Pool'Class)
>>        return not null access T is
>>        type T_Ptr is access T;
>>        for T_Ptr'Storage_Pool use Pool;
>>        Ptr : T_Ptr;
>>    begin
>>        Ptr := new T;
>>        return Ptr.all'Unchecked_Access;
>>    end Allocate_In;
> 
> This doesn't work for unconstrained types.

Why?

   Ptr := new T (discriminants);

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de