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: 103376,81bb2ce65a3240c3
X-Google-NewGroupId: yes
X-Google-Attributes: gida07f3367d7,domainid0,public,usenet
X-Google-Language: ENGLISH,UTF8
Received: by 10.68.236.170 with SMTP id uv10mr14265612pbc.4.1335727968497;
        Sun, 29 Apr 2012 12:32:48 -0700 (PDT)
Path: 
 r9ni113081pbh.0!nntp.google.com!news1.google.com!volia.net!news2.volia.net!feed-A.news.volia.net!news.ecp.fr!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: What would you like in Ada202X?
Date: Sun, 29 Apr 2012 21:32:47 +0200
Organization: Ada @ Home
Message-ID: <op.wdjkkxw4ule2fv@douda-yannick>
References: <3637793.35.1335340026327.JavaMail.geo-discussion-forums@ynfi5>
 <4f97bf40$0$6559$9b4e6d93@newsspool4.arcor-online.net>
 <jn9f2o$g98$1@tornado.tornevall.net> <op.wdb9nm14ule2fv@douda-yannick>
 <jn9pjs$b8a$1@tornado.tornevall.net> <op.wdcbcfmcule2fv@douda-yannick>
 <jn9u73$mao$1@tornado.tornevall.net> <op.wdckmcyzule2fv@douda-yannick>
 <7039631.627.1335610937700.JavaMail.geo-discussion-forums@vbxz8>
 <wccehr6hcw6.fsf@shell01.TheWorld.com>
 <10544679.2854.1335718755733.JavaMail.geo-discussion-forums@vbdx11>
 <wccfwbmwe9p.fsf@shell01.TheWorld.com>
NNTP-Posting-Host: rXMSOiTd84HHp2Ew/pys9A.user.speranza.aioe.org
Mime-Version: 1.0
X-Complaints-To: abuse@aioe.org
User-Agent: Opera Mail/12.00 (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: 2012-04-29T21:32:47+02:00
List-Id: <comp.lang.ada>

Le Sun, 29 Apr 2012 21:04:34 +0200, Robert A Duff  =

<bobduff@shell01.theworld.com> a =C3=A9crit:

> okellogg@users.sourceforge.net writes:
>
>> Could you elaborate?
>
> package P is
>     package Q is
>     private
>     end Q;
> private
> end P;
>
> package body P is
>     package body Q is
>     end Q;
> end P;
>
> In the above nested case:
> P spec can see things in Q spec (imagine all sorts of declarations
>  at various places above).

Yes, and that's useful to define a set of preliminary types needed for t=
he  =

definition of a types, which is to be defined in P. Then, I like to do i=
t  =

all in Q, avoiding overlong and bloat name which would inevitably be the=
re  =

if ever another types follow some similar pattern in P. Unfortunately, i=
f  =

you do this, you cannot give Q any child packages, and if you make Q a  =

child package, it cannot anymore access stuff already defined in p.

package P

    type Comment_Type =E2=80=A6;

    package Q1
       type Role1_Type;
       type Role2_Type;
       type Uuseful_Type;
       -- Useful type defined based on role 1 and role 2
       -- and common type.
    end Q1;

    subtype Some_Type is Q1.Useful_Type;

    package Q2
       type Role1_Type;
       type Role2_Type;
       type Useful_Type;
       -- Note how the pattern is the same as in Q1.
    end Q2;

    subtype Another_Type is Q2.Useful_Type;

end P;


-- =

=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