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From: "Randy Brukardt" <randy@rrsoftware.com>
Newsgroups: comp.lang.ada
Subject: Re: What do you think about this?
Date: Fri, 3 Jul 2015 22:30:09 -0500
Organization: Jacob Sparre Andersen Research & Innovation
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Date: 2015-07-03T22:30:09-05:00
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"Simon Wright" <simon@pushface.org> wrote in message 
news:lyk2uhyrrt.fsf@pushface.org...
> Laurent <lutgenl@icloud.com> writes:
>
>>    type String_Pointer is access all String;
>
> Or you could make this 'access constant String' (not sure this is Ada
> 95, though)

It is. It's not allowed in anonymous access in Ada 95, but it is allowed in 
type declarations.

>>    Prompt_1 : aliased String := "Enter a command >";
>
> and this would be 'aliased constant String'
>
>>    Prompt_Table : array (1 .. 4) of String_Pointer :=
>>                     (Prompt_1'Access, Prompt_2'Access,
>>                      Prompt_3'Access, Prompt_4'Access);
>
> or you could say 'array (1 .. 4) of access constant String' and do away
> with type String_Pointer.

That's not Ada 95 (that was introduced [mistakenly, in hindsight] in Ada 
2005).

>
> In any case Prompt_Table can be 'constant array'.
>
> I believe that GNAT has special circuitry to place all these strings and
> Prompt_Table in ROM (i.e. no need for elaboration).

Probably, but not all Ada compilers will do that. OTOH, it really doesn't 
matter unless you need to burn a ROM (the time elaboration takes is usually 
small enough to ignore).

                         Randy.