Article View: pl.comp.objects
Article #4726Re: Prawda o C++
From: A. Hajderek
Date: Fri, 22 Jan 1999 18:28
Date: Fri, 22 Jan 1999 18:28
36 lines
2596 bytes
2596 bytes
>: Inny kompilator czy optymalizator nie musi zachowac (i nie zachowuje)
>: "fizycznosci" referencji jao pola klasy. Tak ze niestety
"nieprzestawialnosc"
>: referencji w C++ nie jest mitem lecz faktem.
Wynika to z definicji jezyka i to od bardzo dawna.
"A reference cannot be changed to refer to another object after
initialization.
# This means that references are not first class citizens in C++. In a very
real
sense a reference in not an object. Sometimes, [...], a reference can be
optimized out of existence."
("The Annotated C++ Reference Manual", Margaret A. Ellis, Bjarne Stroustrup,
Copyright (c) 1990 by AT&T, reprinted with corrections April, 1995)
Cytat z "Preface":
"It [tzn. ta ksiazka] has been chosen by ANSI to serve as a starting point
fot the
formal standarization of C++".
[Dlaczego nie mozna przestawiac referencji? Streszczam za w.w. publikacja.
-> Poniewaz sa juz wskazniki.]
>Udalo mi sie to obalic w tym szczegolnym przypadku, ale nie zawsze
zadziala;
>standard bowiem nie zaklada fizycznosci dla zmiennych referencyjnych.
I po co? :-)
Pozdrowienia,
Andrzej
Technical Details
Message-ID:
<917029935.18963.0.nnrp-09.c2d9616c@news.demon.co.uk>Path:
mbox-mo1.pugleaf.net!news-archive.icm.edu.pl!pingwin.icm.edu.pl!mat.uni.torun.pl!news.man.torun.pl!news.icm.edu.pl!fu-berlin.de!news-fra.pop.de!newsfeed.ecrc.net!news-fra.maz.net!news-lond.gip.net!news.gsl.net!gip.net!dispose.news.demon.net!demon!news.demon.co.uk!demon!melisa.lscope.co.uk!not-for-mailReferences:
<77o3bl$j0q$1@polonez.man.lodz.pl> <77vn97$j3l$1@polonez.man.lodz.pl> <77vsod$l0u$1@zeus.polsl.gliwice.pl> <36A3823B.1950@bear.com> <78073r$t5p$1@zeus.polsl.gliwice.pl> <781vtm$9l8$3@polonez.man.lodz.pl> <36a58e24.0@news.vogel.pl> <916854946.11215.0.nnrp-02.c2d9616c@news.demon.co.uk> <36a62532.0@news.vogel.pl> <916860225.14810.0.nnrp-02.c2d9616c@news.demon.co.uk> <36a6326b.0@news.vogel.pl> <787s93$oa7$7@polonez.man.lodz.pl> <788ir6$8lt$1@zeus.polsl.gliwice.pl> <789tmc$c7a$6@polonez.man.lodz.pl>Show Full Headers
Complete Article Headers
Path: mbox-mo1.pugleaf.net!news-archive.icm.edu.pl!pingwin.icm.edu.pl!mat.uni.torun.pl!news.man.torun.pl!news.icm.edu.pl!fu-berlin.de!news-fra.pop.de!newsfeed.ecrc.net!news-fra.maz.net!news-lond.gip.net!news.gsl.net!gip.net!dispose.news.demon.net!demon!news.demon.co.uk!demon!melisa.lscope.co.uk!not-for-mail From: "A. Hajderek" <andrew@logicscope.net> Newsgroups: pl.comp.objects Subject: Re: Prawda o C++ Date: Fri, 22 Jan 1999 18:28:40 -0000 Message-ID: <917029935.18963.0.nnrp-09.c2d9616c@news.demon.co.uk> References: <77o3bl$j0q$1@polonez.man.lodz.pl> <77vn97$j3l$1@polonez.man.lodz.pl> <77vsod$l0u$1@zeus.polsl.gliwice.pl> <36A3823B.1950@bear.com> <78073r$t5p$1@zeus.polsl.gliwice.pl> <781vtm$9l8$3@polonez.man.lodz.pl> <36a58e24.0@news.vogel.pl> <916854946.11215.0.nnrp-02.c2d9616c@news.demon.co.uk> <36a62532.0@news.vogel.pl> <916860225.14810.0.nnrp-02.c2d9616c@news.demon.co.uk> <36a6326b.0@news.vogel.pl> <787s93$oa7$7@polonez.man.lodz.pl> <788ir6$8lt$1@zeus.polsl.gliwice.pl> <789tmc$c7a$6@polonez.man.lodz.pl> NNTP-Posting-Host: melisa.lscope.co.uk X-NNTP-Posting-Host: melisa.lscope.co.uk:194.217.97.108 X-Trace: news.demon.co.uk 917029935 nnrp-09:18963 NO-IDENT melisa.lscope.co.uk:194.217.97.108 X-Complaints-To: abuse@demon.net X-Newsreader: Microsoft Outlook Express 4.72.2106.4 X-MimeOLE: Produced By Microsoft MimeOLE V4.72.2106.4 Lines: 39 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit