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-Language: ENGLISH,ASCII-7-bit
X-Google-Thread: 109fba,e0a59694a441eb7b
X-Google-Thread: 103376,e0a59694a441eb7b
X-Google-Thread: fac41,e0a59694a441eb7b
X-Google-Thread: 1108a1,e0a59694a441eb7b
X-Google-Attributes: gid109fba,gid103376,gidfac41,gid1108a1,public
X-Google-ArrivalTime: 2004-04-23 13:13:20 PST
Path: 
 archiver1.google.com!news2.google.com!news.maxwell.syr.edu!newsfeed.icl.net!news-FFM2.ecrc.net!eusc.inter.net!cs.tu-berlin.de!uni-duisburg.de!not-for-mail
From: Georg Bauhaus <sb463ba@l1-hrz.uni-duisburg.de>
Newsgroups: comp.lang.c++,comp.lang.ada,comp.lang.eiffel,comp.object
Subject: Re: OOP Language for OS Development
Date: Fri, 23 Apr 2004 20:13:19 +0000 (UTC)
Organization: GMUGHDU
Message-ID: <c6btcv$2gn$1@a1-hrz.uni-duisburg.de>
References: <95db0572.0404142153.431fd058@posting.google.com>
 <566e2bfb.0404181753.2844342f@posting.google.com>
 <ytOgc.39006$zm5.17464@nntpserver.swip.net>
 <c67sgr$2e0$1@news5.svr.pol.co.uk> <4088D574.2020503@tele2.fr>
 <c6ap5j$1nh$1@newsg1.svr.pol.co.uk> <c6bfs3$ed7$1@a1-hrz.uni-duisburg.de>
 <1082738747.300309@master.nyc.kbcfp.com>
NNTP-Posting-Host: l1-hrz.uni-duisburg.de
X-Trace: a1-hrz.uni-duisburg.de 1082751199 2583 134.91.1.34 (23 Apr 2004
 20:13:19 GMT)
X-Complaints-To: usenet@news.uni-duisburg.de
NNTP-Posting-Date: Fri, 23 Apr 2004 20:13:19 +0000 (UTC)
User-Agent: tin/1.5.8-20010221 ("Blue Water") (UNIX) (HP-UX/B.11.00
 (9000/800))
Xref: archiver1.google.com comp.lang.c++:31321 comp.lang.ada:7432
 comp.lang.eiffel:728 comp.object:11058
Date: 2004-04-23T20:13:19+00:00
List-Id: <comp.lang.ada>

In comp.lang.ada Hyman Rosen <hyrosen@mail.com> wrote:
: Georg Bauhaus wrote:
:> How would you write "once" routines in C++?
: 
: With a static method containing a static value, of course.

So in the general case where the method will have (side)
effects on object variables I use an if (once) {...} with a
static bool once, I guess?  Whatever suggests the necessity
of ONCE in a language, if it is necessary then being able
to write ONCE might have an advantage in my view.

:> They are different I think. Can you express
:>  deferred class C [P -> T]
:>  feature foo(x: P): P is deferred end
:>  end -- C
:> in C++?
: 
: Sure. You just don't define the method, and if it gets used,
: the linker will complain.

So the compiler, compiling seperately, will not know which types
can be passed to some_C.foo before the linker is run.