From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me
X-Spam-Level: 
X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,FREEMAIL_FROM
	autolearn=ham autolearn_force=no version=3.4.4
X-Google-Thread: a07f3367d7,39579ad87542da0e
X-Google-Attributes: gida07f3367d7,public,usenet
X-Google-NewGroupId: yes
X-Google-Language: ENGLISH,UTF8
X-Received: by 10.180.210.161 with SMTP id mv1mr1643295wic.1.1368583815686;
        Tue, 14 May 2013 19:10:15 -0700 (PDT)
Path: 
 hg5ni110160wib.1!nntp.google.com!feeder1.cambriumusenet.nl!82.197.223.103.MISMATCH!feeder3.cambriumusenet.nl!82.197.223.108.MISMATCH!feeder2.cambriumusenet.nl!feed.tweaknews.nl!194.109.133.83.MISMATCH!newsfeed.xs4all.nl!newsfeed4.news.xs4all.nl!xs4all!border4.nntp.ams.giganews.com!border2.nntp.ams.giganews.com!border2.nntp.dca.giganews.com!nntp.giganews.com!newsfeed.news.ucla.edu!nrc-news.nrc.ca!News.Dal.Ca!news.litech.org!news.stack.nl!aioe.org!.POSTED!not-for-mail
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 09:14:26 +0200
Organization: Ada @ Home
Message-ID: <op.wwwrqcmdule2fv@cardamome>
References: <op.wv8jh1c1ule2fv@cardamome>
 <17ceq51ydy3s0.s94miqqzbg5w.dlg@40tude.net> <op.wwny5jerule2fv@cardamome>
 <1vrhb7oc4qbob$.q02vuouyovp5$.dlg@40tude.net> <op.wwn4oak8ule2fv@cardamome>
 <19lrzzbgm77v6.1dzpgqckptaj6.dlg@40tude.net> <kmbohm$elb$1@loke.gir.dk>
 <p0pf97g5w6xg.jhca6ztjwpde$.dlg@40tude.net> <op.wwq9s4l6ule2fv@cardamome>
 <1bfhq7jo34xpi.p8n2vq6yjsea.dlg@40tude.net> <op.wwrefx1pule2fv@cardamome>
 <cps71yzogw24$.7ol98fxcaurj$.dlg@40tude.net> <op.wwriky0dule2fv@cardamome>
 <nd22gfeezrwf$.tlj4yyygrwq3$.dlg@40tude.net> <kmecg6$et4$1@loke.gir.dk>
 <12gn9wvv1gwfk.10ikfju4rzmnj.dlg@40tude.net> <kmh7d4$up3$1@loke.gir.dk>
 <op.wwumn3r2ule2fv@cardamome> <av4r5qFitfiU1@mid.individual.net>
 <kmk2on$tij$1@loke.gir.dk>
NNTP-Posting-Host: Sz+Cz+YCi2SKRtUDNsu0BQ.user.speranza.aioe.org
Mime-Version: 1.0
X-Complaints-To: abuse@aioe.org
User-Agent: Opera Mail/12.15 (Linux)
X-Notice: Filtered by postfilter v. 0.8.2
Content-Type: text/plain; charset=utf-8; format=flowed; delsp=yes
Content-Transfer-Encoding: Quoted-Printable
Date: 2013-05-11T09:14:26+02:00
List-Id: <comp.lang.ada>

Le Sat, 11 May 2013 02:18:30 +0200, Randy Brukardt <randy@rrsoftware.com=
>  =

a =C3=A9crit:
> Thanks for the reference. I doubted that the idea was new (there are n=
o  =

> new
> ideas), but I hadn't heard of it before. I don't like the name much,  =

> because
> it feeds into the "type is everything" madness that Dmitry exhibits so=

> clearly. This clearly (just like constraints and predicates) is someth=
ing
> that's added in addition to type analysis; it's not part of it at all.=


I agree this cannot be checked with typing and needs an additional  =

analysis, that seems obvious. But where would you state the predicates t=
o  =

be verified, if not in something which is bounded to the type? The type =
 =

definition it self or its methods, is the only one place where to requir=
es  =

the predicates to be verified; this can't move around freely, this have =
to  =

be bound to it in some way.

-- =

=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