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From: Maciej Sobczak <see.my.homepage@gmail.com>
Newsgroups: comp.lang.ada
Subject: Re: Allocators and exceptions
Date: Thu, 13 Sep 2007 02:43:41 -0700
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Date: 2007-09-13T02:43:41-07:00
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On 13 Wrz, 00:32, "Randy Brukardt" <ra...@rrsoftware.com> wrote:

>     type Access_T is access all T;
>     procedure Free is new Unchecked_Deallocation (T, Access_T);
>     function Alloc_Object (...) return Access_T is
>        A_T : Access_T := new T; -- Default initialized.
>     begin
>        A_T.all := <constructor>;
>        return A_T;
>     exception
>         when others => Free(A_T); return null;
>     end Alloc_Object;

Yes, this is a very reasonable approach. I would even propagate (or
translate) the exception out instead of returning null - this can make
it more plausible to work with at the call site.

--
Maciej Sobczak
http://www.msobczak.com/