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From: =?utf-8?Q?Yannick_Duch=C3=AAne_=28Hibou57?=
 =?utf-8?Q?=29?=
 <yannick_duchene@yahoo.fr>
Newsgroups: comp.lang.ada
Subject: Re: Seeking for papers about tagged types vs access to subprograms
Date: Sat, 11 May 2013 09:46:40 +0200
Organization: Ada @ Home
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Date: 2013-05-11T09:46:40+02:00
List-Id: <comp.lang.ada>

Le Sat, 11 May 2013 02:42:37 +0200, Randy Brukardt <randy@rrsoftware.com=
>  =

a =C3=A9crit:
> I don't think operations have anything to do with types: they *use*  =

> types,
> they aren't part of them in any way. The "profile" of objects determin=
es
> what operations can be used with them.

Well, =E2=80=9Cthey use=E2=80=9D or =E2=80=9Cthey provides=E2=80=9D or =E2=
=80=9Cthey comes with=E2=80=9D, ends to be all  =

the same: that's a system of interdependent things. A type may depends o=
n  =

a function to create its instances, at least in the public view, as much=
  =

as sub=E2=80=91programs depends on types, and there are optional and req=
uired  =

dependencies (if optional, better in child or other packages).

To be checked: do all formalism use functions and types at their core  =

basis or are there some formalisms which only uses functions and defines=
  =

types in terms of functions (I will check it a future day, I believe the=
  =

latter is the is true, while not sure).

-- =

=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