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From: "Luke A. Guest" <laguest@archeia.com>
Newsgroups: comp.lang.ada
Subject: Re: How can I get this data into the .data section of the binary?
Date: Tue, 16 Jun 2020 16:43:07 +0100
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On 16/06/2020 16:21, Dmitry A. Kazakov wrote:
> On 16/06/2020 16:42, Luke A. Guest wrote:
>> On 16/06/2020 15:25, Dmitry A. Kazakov wrote:
>>> On 16/06/2020 16:14, Niklas Holsti wrote:
>>
>>>> I have no idea if this will help you -- the types in our case were
>>>> much simpler -- but you might try it with a small subset of your
>>>> package:
>>>>
>>>>      Pixel_Format_Unknown     : constant Pixel_Format_Names :=
>>>>        (True, (NUL, NUL, NUL, NUL));
>>>>
>>>> (assuming "use Ada.Characters.Latin_1").
>>>
>>> That is interesting. Was there the "others =>" part?
>>>
>>> I can imagine that with "others => NUL" a static zeroed section were
>>> used with other parts written upon it during start.
>>>
>>> P.S. I hope more people now see why compile-time subprograms are
>>> necessary.
>>>
>>
>> I don't think Ada needs compile-time subprograms, it just needs to
>> recognise actual static data which can be generated at compile time,
> 
> Without calling subprograms? That is not possible in 99% of use cases.

Course it is. The compiler will translate the code into data.

> Note also that initialization of shared sections using run-time code is
> simply not possible as you must run the code exactly once.
> 
>> also the static_predicate could be evaluated by the compiler at runtime
>> too.
> 
> And the predicate's terms were only literals?
> 

Yup.