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 autolearn=ham
	autolearn_force=no version=3.4.4
X-Google-Thread: a07f3367d7,2078ce7aac45af5b
X-Google-Attributes: gida07f3367d7,public,usenet
X-Google-NewGroupId: yes
X-Google-Language: ENGLISH,ASCII-7-bit
Received: by 10.152.109.171 with SMTP id ht11mr15136lab.2.1353486861590;
        Wed, 21 Nov 2012 00:34:21 -0800 (PST)
Path: 
 ha8ni3667wib.1!nntp.google.com!feeder1.cambriumusenet.nl!feeder3.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!backlog2.nntp.dca.giganews.com!border4.nntp.dca.giganews.com!border2.nntp.dca.giganews.com!nntp.giganews.com!news.glorb.com!eternal-september.org!feeder.eternal-september.org!mx04.eternal-september.org!.POSTED!not-for-mail
From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: Ada202X : Adding functors
Date: Wed, 14 Nov 2012 21:45:24 +0000
Organization: A noiseless patient Spider
Message-ID: <lyzk2jrh8r.fsf@nidhoggr.home>
References: <0114d327-9f9f-4ad2-9281-56331d11a90c@googlegroups.com>
	<2bb9e5fa-04a2-4073-bca1-1739ce0580f1@googlegroups.com>
	<57bca956-2348-4825-8f5f-04fb91863696@googlegroups.com>
	<094f94ed-dbcc-4dba-bd9d-894a75f69037@googlegroups.com>
	<d2a94934-9a3f-4e50-b97d-249980221aea@googlegroups.com>
	<8373eaf3-5299-4bbb-a462-56d2d76d6333@googlegroups.com>
	<1na6brajyyab1.1m57ova8gzvwk$.dlg@40tude.net>
Mime-Version: 1.0
Injection-Info: mx04.eternal-september.org;
 posting-host="f38d6453efa614aca652dfde0a80d954";
	logging-data="21427"; mail-complaints-to="abuse@eternal-september.org";
	posting-account="U2FsdGVkX18YH8rCs4ztHS4eZTGbipRGQkv0h5hTiIA="
User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.2 (darwin)
Cancel-Lock: sha1:IxqwocVFd4jsNeH9bSRS4pZAe4U=
	sha1:Mve3zWF0BCIO2+kTk3Z2T6b57Tg=
X-Original-Bytes: 2396
Content-Type: text/plain
Date: 2012-11-14T21:45:24+00:00
List-Id: <comp.lang.ada>

"Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> writes:

> On Wed, 14 Nov 2012 08:54:09 -0800 (PST), Adam Beneschan wrote:
>
>> A new way to write obfuscated code?
>
> I don't understand the point. If there is any obfuscation then on the
> Ada's side which does not support straightforward declaration of
> user-defined arrays/indexing operation.

This is Martin's code:

   procedure Test is
      F1 : constant Algorithm := C_To_F.Create (10.0);
      F2 : constant Algorithm := C_To_F.Create (20.0);
   begin
      Put_Line ("F1 := " & Long_Float'Image (F1(X)));
      Put_Line ("F2 := " & Long_Float'Image (F2(X)));
   end Test;

F1(X) is a user-defined array indexing which returns the Fahrenheit
equivalent of the 10.0 Celsius that F1 was created with *no matter what
index you supply* because the only purpose of making it look like an
array indexing was to avoid making it look like what it is - a
subprogram call.

There may be some point in this in C++, if the templating mechanism only
cares about the syntactic feature of ()-represents-invocation. I'm not
sure I want to know.