From: reinert <reinkor@gmail.com>
Subject: Re: Q: discrete_subtype_definition: static only cases?
Date: Wed, 10 Jun 2020 22:36:39 -0700 (PDT)
Date: 2020-06-10T22:36:39-07:00 [thread overview]
Message-ID: <33d5f817-74aa-4373-a5e1-026962dc3ef7o@googlegroups.com> (raw)
In-Reply-To: <2d4d6645-7055-4564-a854-6da5fc83af4eo@googlegroups.com>
I have made myself somehow similar questions, and found workarounds using subtype predicates.
http://www.ada-auth.org/standards/12rat/html/Rat12-2-5.html
reinert
søndag 7. juni 2020 11.27.33 UTC+2 skrev gautier...@hotmail.com følgende:
> Hi,
>
> Are there cases in the Ada syntax where a discrete_subtype_definition (RM 3.6 (6)) is expected to be determined at compile-time?
>
> For instance, for array indices or "for" loops, it can be static or dynamic.
> Same for subtypes.
>
> procedure SD is
> A : array (1 .. 5) of Integer;
> type XYZ is (X, Y, Z);
> begin
> for I in 1 .. 3 loop
> declare
> B : array (1 .. I) of Integer; -- I is a variable
> begin
> for J in 1 .. I loop -- I is a variable
> B (J) := J;
> end loop;
> end;
> end loop;
> for E in XYZ loop
> declare
> subtype S is XYZ range X .. E; -- E is a variable
> begin
> null;
> end;
> end loop;
> end;
> _________________________
> Gautier's Ada programming
> https://hacadacompiler.sourceforge.io/
> NB: follow the above link for a valid e-mail address
prev parent reply other threads:[~2020-06-11 5:36 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-07 9:27 Q: discrete_subtype_definition: static only cases? gautier_niouzes
2020-06-07 10:40 ` J-P. Rosen
2020-06-07 11:36 ` Niklas Holsti
2020-06-07 12:05 ` Niklas Holsti
2020-06-07 21:02 ` J-P. Rosen
2020-06-08 4:55 ` gautier_niouzes
2020-06-07 12:13 ` gautier_niouzes
2020-06-07 13:02 ` Jeffrey R. Carter
2020-06-07 13:14 ` gautier_niouzes
2020-06-07 13:50 ` AdaMagica
2020-06-07 14:11 ` gautier_niouzes
2020-06-07 13:00 ` Jeffrey R. Carter
2020-06-11 5:36 ` reinert [this message]
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