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From: Martin Krischik <krischik@users.sourceforge.net>
Newsgroups: comp.lang.ada
Subject: Re: ADA Popularity Discussion Request
Date: Mon, 20 Sep 2004 09:36:27 +0200
Organization: AdaCL
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Date: 2004-09-20T09:36:27+02:00
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Simon Wright wrote:

> Georg Bauhaus <sb463ba@l1-hrz.uni-duisburg.de> writes:
> 
>> Martin Krischik <krischik@users.sourceforge.net> wrote:
>> :> for constants,
>> :> 
>> :>    X: constant Ragged :=
>> :>     ( new String'("1"),
>> :>     ...
>> :> 
>> :> does just as well, the allocations are performed by the compiler,
>> :> not at run time :-)
>> : 
>> : Really! I did not know that! Where does it say in the RM - or is a
>> : compiler dependent optimisation.
>> 
>> I've found it to be true, and it looks like compatible with
>> "evaluation of an allocator" and elaboration (control, preelaborate?).
>> I don't know whether there is a sentence addressing this directly,
>> maybe the experts can tell?
>> 
>> Both ObjectAda and GNAT do this. I don't know whether it is at
>> all possible to intruct ObjectAda not to "preallocate" constant
>> string pointers.
> 
> This code
> 
>    package New_String is
> 
>       type String_P is access all String;

Should it be not "access constant String".

With Regards

Martin
-- 
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