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| From | Keith Thompson <kst-u@mib.org> |
|---|---|
| Newsgroups | comp.lang.c |
| Subject | Re: what is n1570? |
| Date | 2011-07-01 13:23 -0700 |
| Organization | None to speak of |
| Message-ID | <lntyb5698h.fsf@nuthaus.mib.org> (permalink) |
| References | <5903d461-260f-4d81-a120-e0d787c3c0f1@z7g2000prh.googlegroups.com> <1b62nofk75.fsf@snowball.wb.pfeifferfamily.net> <6998523e-c479-4858-b93d-a56dc0bb3356@d7g2000vbv.googlegroups.com> <iul8dc$5i6$1@oravannahka.helsinki.fi> |
Lauri Alanko <la@iki.fi> writes:
> In article <6998523e-c479-4858-b93d-a56dc0bb3356@d7g2000vbv.googlegroups.com>,
> pete <pete@pwilson.net> wrote:
>> Horrifying to me because I didn't understand that the const qualifier
>> has run-time implications. But now I got my mind right, boss.
>
> Note that these run-time implications are a _good_ thing. Because a
> program isn't allowed to modify const storage, this means that
> multiple running instances of a program (or of several programs using
> the same library) can all share a single instance of this read-only
> data in memory.
Yes, but an implementation isn't *required* to do that.
A conforming implementation could generate exactly the same code
for a given program and for the same program with all occurences of
"const" removed, as long as it issues the required diagnostics for
any constraint violations.
--
Keith Thompson (The_Other_Keith) kst-u@mib.org <http://www.ghoti.net/~kst>
Nokia
"We must do something. This is something. Therefore, we must do this."
-- Antony Jay and Jonathan Lynn, "Yes Minister"
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what is n1570? pete <pete@pwilson.net> - 2011-06-29 08:24 -0700
Re: what is n1570? Noob <root@127.0.0.1> - 2011-06-29 18:08 +0200
Re: what is n1570? Shao Miller <sha0.miller@gmail.com> - 2011-06-29 12:29 -0400
Re: what is n1570? Keith Thompson <kst-u@mib.org> - 2011-06-29 10:26 -0700
Re: what is n1570? Seebs <usenet-nospam@seebs.net> - 2011-06-29 17:46 +0000
Re: what is n1570? Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2011-06-29 14:37 -0600
Re: what is n1570? Seebs <usenet-nospam@seebs.net> - 2011-06-29 21:15 +0000
Re: what is n1570? Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2011-06-29 20:39 -0600
Re: what is n1570? Seebs <usenet-nospam@seebs.net> - 2011-06-30 14:52 +0000
Re: what is n1570? pete <pete@pwilson.net> - 2011-07-01 12:43 -0700
Re: what is n1570? Lauri Alanko <la@iki.fi> - 2011-07-01 19:50 +0000
Re: what is n1570? Keith Thompson <kst-u@mib.org> - 2011-07-01 13:23 -0700
Re: what is n1570? "J. J. Farrell" <jjf@bcs.org.uk> - 2011-06-29 23:32 +0100
Re: what is n1570? Keith Thompson <kst-u@mib.org> - 2011-06-29 16:55 -0700
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