From 8619863723939341005 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: f78e5,fb1a92fa405c930c X-Google-Attributes: gidf78e5,public From: comeau@panix.com (Greg Comeau) Subject: Re: nested functions Date: 1999/06/16 Message-ID: <7k5og8$ct1$1@panix.com>#1/1 X-Deja-AN: 490110759 Approved: Fergus Henderson References: <081650426190c69CPIMSSMTPU07@email.msn.com> <7k0b01$nod$1@panix.com> <7k3fr2$7el@abyss.West.Sun.COM> X-Original-Date: 15 Jun 1999 10:38:00 -0400 X-Complaints-To: news@news.unimelb.edu.au X-Trace: izvestia.its.unimelb.edu.au 929505322 14513 128.250.29.16 (16 Jun 1999 03:55:22 GMT) Organization: Comeau Computing; http://www.comeaucomputing.com X-Auth: PGPMoose V1.1 PGP comp.std.c++ iQBFAgUAN2cgFuEDnX0m9pzZAQGGOQF/fIv1/SEtjKkuU/woTckTtS3cFea99f45 Jq9yOow0/QkbY5KQKy+tmA8cZokMNh9g =jqT5 Reply-To: comeau@comeaucomputing.com NNTP-Posting-Date: 16 Jun 1999 03:55:22 GMT Newsgroups: comp.std.c++ X-Newsposter: trn 4.0-test55 (26 Feb 97) In article <7k3fr2$7el@abyss.West.Sun.COM> stanley@West.Sun.COM (Stanley Friesen [Contractor]) writes: >In article <7k0b01$nod$1@panix.com>, >Greg Comeau wrote: >>scope is a syntactic thing. It doesn't apply to a running program >>in the same sense. > >True - but there is this little rule that variables of automatic *duration* >are destroyed on exit from their scope. As I recall the post I responded to, the scope was not existed yet, and hence why I made this point. >> So, when you say the local vars do not exist when >>you leave the scope, they will if the local function calls a different >>function, perhaps passing or having pointers to the local vars. > >But if the destructors have been called on them, and the sotrage reused for >some other set of automatic variables (as is allowed upon leaving a function), >then those pointers generate undefined behavior, as they are pointers to >variables after their destructors are called. Again, as I recall the original context, this didn't seem to apply (my point was to raise that no function was left yet as I recall it). I do completely agree with your points when they apply though. - Greg -- Comeau Computing, 91-34 120th Street, Richmond Hill, NY, 11418-3214 Producers of Comeau C/C++ 4.2.38 -- New Release! We now do Windows too. Email: comeau@comeaucomputing.com / Voice:718-945-0009 / Fax:718-441-2310 *** WEB: http://www.comeaucomputing.com *** --- [ 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://reality.sgi.com/austern_mti/std-c++/faq.html ]