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Date: Thu, 22 Apr 2021 03:21:19 -0700 (PDT)
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Subject: Re: Unchecked_Deallocation with tagged types
From: Vincent Marciante <vincent.marciante@l3harris.com>
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Xref: reader02.eternal-september.org comp.lang.ada:61896
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On Wednesday, April 21, 2021 at 9:28:06 AM UTC-4, J-P. Rosen wrote:
> Le 21/04/2021 =C3=A0 12:21, Vincent Marciante a =C3=A9crit :=20
> > But that idiom pretty much prohibits "using" more than one package with=
 such naming:=20
> >=20
> > use Queues, Lists;=20
> >=20
> > Queue : Handle; --\ Both=20
> > List : Handle; --/ ambiguous=20
> >
> I would not agree with "prohibits". You may still use qualified notation=
=20
> in the scope of a "use" clause, so yes, you have to write:=20
> Queue : Queues.Handle;=20
> List : Lists.Handle;=20
>=20
> which is not worse that having:=20
> Queue : Queues_Handle;=20
> List : Lists_Handle;
> --=20
> J-P. Rosen=20
> Adalog=20
> 2 rue du Docteur Lombard, 92441 Issy-les-Moulineaux CEDEX=20
> Tel: +33 1 45 29 21 52
> https://www.adalog.fr
Of course you are correct (my last response seems to have been garbled by G=
oogle groups).
But - in the case the there is only one such type involved, I'd prefer

X : List; Y : List; instead of X : Handle; Y : Handle;

I do not like the idea/idiom that the type always has the same name - handl=
e - and=20
"thingness" is only expressed by the package name.  _That_ seems way more r=
edundant
and is a redundancy that cannot be removed by a "use" clause, whereas, the =
redundancy=20
in something like  Guests : Lists.List; can be made to be Guests : List and=
 still express
the nature of the data structure.

But like I wrote in my garbled response, I think that it ultimately become =
an issue of
individual preference. (Not talking about what might be the decree/agreemen=
t in the=20
guidelines/standard of a multi-person project.)=20