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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: Thu, 16 May 2013 13:56:22 +0200
Organization: Ada @ Home
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Date: 2013-05-16T13:56:22+02:00
List-Id: <comp.lang.ada>

Le Thu, 16 May 2013 13:31:58 +0200, Peter C. Chapin <PChapin@vtc.vsc.edu=
>  =

a =C3=A9crit:
> I again return to my original statement: a type is two sets, a set of =
 =

> values and a set of operations.

There is nothing like operation as something distinct from values, at  =

least formally. Operations as understood in procedural languages, is an =
 =

interpretation, especially when it has side effects, it differs entirely=
.  =

There is no operations, and there are at most functions, which are  =

expressions which are values (a partially evaluated expression like a  =

function is supposed to be most often unless constant, is still a value,=
  =

this is just a set which is that of a domain, still a value).

(don't kick too hard if it happens I'm boring :D )

I feel there is a mix of formal definitions and language specific  =

definitions, while both can't be mixed.

-- =

=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