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Newsgroups: comp.lang.ada
Date: Sat, 13 Apr 2019 06:48:53 -0700 (PDT)
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Subject: Re: Why can't objects be static in Ada?
From: Lucretia <laguest9000@googlemail.com>
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Xref: reader01.eternal-september.org comp.lang.ada:56129
Date: 2019-04-13T06:48:53-07:00
List-Id: <comp.lang.ada>

On Saturday, 13 April 2019 14:07:13 UTC+1, Jere  wrote:
> On Thursday, April 11, 2019 at 8:40:40 AM UTC-4, Lucretia wrote:

> >    Zero_Size : constant Sizes :=3D (others =3D> Natural_Dimension'First=
);
> >=20
> > Why can't Zero_Size be compiled as static in this pre-elaborated packag=
e?
> >=20
> > This seems to be a major flaw in Ada imo.
> >=20
> > Luke.
>=20
> Out of curiosity, are you looking for something more akin to C++'s
> constexpr [1][2] keyword?  Ada's static definition is kind of like that,=
=20

What I'm after is for the compiler to compile a constant, which as can be s=
een has it's components initialised from other constants, such that I can t=
hen pass the overall constant like Zero_Size, into a generic, in which the =
whole outer package is pre-elaborated.

> but not as flexible or usable yet.  I'm hoping that at some point Ada=20
> does adjust the definition of static to be even more useful.  Most=20

I can't believe, in 40 years, nobody has come up against this issue before.

I suppose maybe that constexpr function modifier would be helpful here too,=
 but really the data should be considered static, as in, clearly defined at=
 compile time.