From -3161036306713682621 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: f78e5,2340bb60e0f0f248 X-Google-Attributes: gidf78e5,public X-Google-ArrivalTime: 2002-02-22 14:59:08 PST Path: archiver1.google.com!news1.google.com!newsfeed.stanford.edu!newsfeeds.belnet.be!news.belnet.be!colt.net!dispose.news.demon.net!news.demon.co.uk!demon!mail2news.demon.co.uk!not-for-mail From: Markus Werle Newsgroups: comp.std.c++ Subject: Re: proposal for resolution of "valarray operator[] const returning value" (closed isuue 77) Date: Fri, 22 Feb 2002 22:58:38 GMT Organization: Aachen University of Technology (RWTH) Approved: Fergus Henderson , moderator of comp.std.c++ Message-ID: References: <3c6c03e9.287237645@news.easynet.co.uk> <7dc3b1ea.0202201107.6adbbf61@posting.google.com> X-Trace: mail2news.demon.co.uk 1014418723 mail2news:7476 mail2news mail2news.demon.co.uk X-Complaints-To: abuse@demon.net X-Mail2News-Path: news.demon.net!mulga.cs.mu.oz.au X-Authentication-Warning: mulga.cs.mu.OZ.AU: fjh set sender to devnull@stump.algebra.com using -f X-Robomod: STUMP, ichudov@algebra.com (Igor Chudov) Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7Bit NNTP-Posting-Date: 22 Feb 2002 09:38:47 GMT User-Agent: KNode/0.6.1 Lines: 47 Xref: archiver1.google.com comp.std.c++:9740 Peter Dimov wrote: > Would introducing a data() member function solve this problem, or the > problem in general? It would be better. Nevertheless I feel unhappy with this approach. I always found that asymmetry of concepts is the thing that gives a lot of pain in C++. The normal vector way to contact a fortran library is std::vector v; [...] call_fortran_stuff(&v[0]); So I think there is no need to complicate the use of STL again. vector and valarray should be kept in symmetry for those features that they (could) share. We should consider the decisison to let valarray<...>::operator[] const; return a value as a decisison that had unwanted effects on its usability and I look forward to a _clean_ fix, which does not need any further repair in the future. I fear that with my policy-class approach there are other problems which may crop up, so this is why I ask You again to look at it and to find them. Markus --- [ comp.std.c++ is moderated. To submit articles, try just posting with ] [ your news-reader. If that fails, use mailto:std-c++@ncar.ucar.edu ] [ --- Please see the FAQ before posting. --- ] [ FAQ: http://www.research.att.com/~austern/csc/faq.html ]