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From: =?utf-8?Q?Yannick_Duch=C3=AAne_=28Hibou57?=
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 <yannick_duchene@yahoo.fr>
Newsgroups: comp.lang.ada
Subject: Re: Seeking for papers about tagged types vs access to subprograms
Date: Mon, 06 May 2013 12:00:25 +0200
Organization: Ada @ Home
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Date: 2013-05-06T12:00:25+02:00
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Le Tue, 30 Apr 2013 02:31:37 +0200, Yannick Duch=C3=AAne (Hibou57)  =

<yannick_duchene@yahoo.fr> a =C3=A9crit:

> Le Sun, 28 Apr 2013 07:14:15 +0200, Yannick Duch=C3=AAne (Hibou57)  =

> <yannick_duchene@yahoo.fr> a =C3=A9crit:
>> As an additional aside but related question, I'm also interested in t=
he  =

>> question in the particular context of storage=E2=80=91pools, which us=
e tagged  =

>> types instead of simple sub=E2=80=91program designated by some attrib=
utes or  =

>> operator overloading (I imagine simple sub=E2=80=91programs could hav=
e been an  =

>> option for the `new` operator, just like for the other operators).
>
> Same question in the context of `Ada.Finalization`. Similar semantic  =

> could have been made available without requiring tagged types.
>

I also looked at the RM about user=E2=80=91defined indexing, and could n=
ot find a  =

reason why it is legal for tagged types only. May be I will understand a=
  =

future day why it requires a tagged type, so far, it makes me feel it's =
 =

lacking orthogonality.

Or else, may be it suggest types should rather be tagged by default but =
 =

the primitives ones or derived from the primitive ones.


-- =

=E2=80=9CSyntactic sugar causes cancer of the semi-colons.=E2=80=9D [1]
=E2=80=9CStructured Programming supports the law of the excluded muddle.=
=E2=80=9D [1]
[1]: Epigrams on Programming =E2=80=94 Alan J. =E2=80=94 P. Yale Univers=
ity