Groups | Search | Server Info | Login | Register
Groups > comp.lang.c > #397281
| Path | csiph.com!eternal-september.org!feeder.eternal-september.org!nntp.eternal-september.org!.POSTED!not-for-mail |
|---|---|
| From | Keith Thompson <Keith.S.Thompson+u@gmail.com> |
| Newsgroups | comp.lang.c |
| Subject | Re: Why is this happening? |
| Date | Sun, 29 Mar 2026 13:57:41 -0700 |
| Organization | None to speak of |
| Lines | 25 |
| Message-ID | <87mrzquzei.fsf@example.invalid> (permalink) |
| References | <10q5046$3ec1o$2@dont-email.me> <10q523v$3e865$1@dont-email.me> <n2n05bFmg8nU2@mid.individual.net> <10q7bug$7vod$1@dont-email.me> <87bjg8wrgl.fsf@example.invalid> <10q7kon$aibc$2@dont-email.me> <10q85s6$fe60$1@dont-email.me> <10q8e9o$igtv$1@dont-email.me> <10q8sg1$nocf$1@dont-email.me> <10q91bf$pms8$2@dont-email.me> <10qarlj$1c51m$3@dont-email.me> |
| MIME-Version | 1.0 |
| Content-Type | text/plain; charset=utf-8 |
| Content-Transfer-Encoding | 8bit |
| Injection-Date | Sun, 29 Mar 2026 20:57:42 +0000 (UTC) |
| Injection-Info | dont-email.me; posting-host="1ddb92ea07dcf10ad5bdf45e81a7e5f2"; logging-data="2008312"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX18OMlgok6gu3XsHaGKbEa0g" |
| User-Agent | Gnus/5.13 (Gnus v5.13) |
| Cancel-Lock | sha1:xcEcKqv0hbfnUdZaeS9zVLAjnxY= sha1:fYDKFBIiAoItFC/hYAecq7W5i0E= |
| Xref | csiph.com comp.lang.c:397281 |
Show key headers only | View raw
David Brown <david.brown@hesbynett.no> writes:
> On 28/03/2026 17:58, Richard Harnden wrote:
>> On 28/03/2026 15:35, David Brown wrote:
>>> Well, underscore basically counts as a letter, so it's a valid
>>> identifier just like "x1234" would be. Sometimes people use
>>> identifiers like that for specific purposes, like macro parameters.
>> Isn't _UPPERCASE and __anything reserved for the implementation?
>
> Yes.
>
> And identifiers with _lowercase have implicit internal linkage (when
> they would otherwise have had implicit external linkage). That's why
> I wrote "underscore /basically/ counts as a letter" - to save
> mentioning all the details.
I don't believe that's correct. The language defines rules about
which identifiers are reserved depending on how they're spelled,
but I've never seen a rule that says the linkage of an identifier
is affected by its spelling. (A compiler could take advantage of
undefined behavior to do something weird, but I believe and hope
that no compilers actually do so.)
--
Keith Thompson (The_Other_Keith) Keith.S.Thompson+u@gmail.com
void Void(void) { Void(); } /* The recursive call of the void */
Back to comp.lang.c | Previous | Next — Previous in thread | Next in thread | Find similar
Why is this happening? DFS <nospam@dfs.com> - 2026-03-27 00:12 -0400
Re: Why is this happening? Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2026-03-27 05:46 +0100
Re: Why is this happening? Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2026-03-27 06:01 +0100
Re: Why is this happening? DFS <nospam@dfs.com> - 2026-03-27 02:31 -0400
Re: Why is this happening? Josef Möllers <josef@invalid.invalid> - 2026-03-27 10:15 +0100
Re: Why is this happening? scott@slp53.sl.home (Scott Lurndal) - 2026-03-27 16:02 +0000
Re: Why is this happening? Josef Möllers <josef@invalid.invalid> - 2026-03-28 21:58 +0100
Re: Why is this happening? Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2026-03-29 14:30 +0200
Re: Why is this happening? scott@slp53.sl.home (Scott Lurndal) - 2026-03-29 18:56 +0000
Re: Why is this happening? Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2026-03-30 02:00 +0200
Re: Why is this happening? Mike Terry <news.dead.person.stones@darjeeling.plus.com> - 2026-03-30 00:41 +0100
Re: Why is this happening? Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2026-03-30 09:25 +0200
Re: Why is this happening? Michael S <already5chosen@yahoo.com> - 2026-03-30 11:23 +0300
Re: Why is this happening? Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2026-03-30 11:16 +0200
Re: Why is this happening? Michael S <already5chosen@yahoo.com> - 2026-03-30 13:06 +0300
Re: Why is this happening? Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-03-28 01:46 +0000
Re: Why is this happening? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2026-03-27 20:41 -0700
Re: Why is this happening? Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2026-03-28 05:17 +0100
Re: Why is this happening? David Brown <david.brown@hesbynett.no> - 2026-03-28 10:09 +0100
Re: Why is this happening? Bart <bc@freeuk.com> - 2026-03-28 11:33 +0000
Re: Why is this happening? David Brown <david.brown@hesbynett.no> - 2026-03-28 16:35 +0100
Re: Why is this happening? Richard Harnden <richard.nospam@gmail.invalid> - 2026-03-28 16:56 +0000
Re: Why is this happening? Richard Harnden <richard.nospam@gmail.invalid> - 2026-03-28 16:58 +0000
Re: Why is this happening? James Kuyper <jameskuyper@alumni.caltech.edu> - 2026-03-28 19:24 -0400
Re: Why is this happening? David Brown <david.brown@hesbynett.no> - 2026-03-29 11:33 +0200
Re: Why is this happening? Richard Harnden <richard.nospam@gmail.invalid> - 2026-03-29 16:30 +0100
Re: Why is this happening? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2026-03-29 10:37 -0700
Re: Why is this happening? David Brown <david.brown@hesbynett.no> - 2026-03-31 16:20 +0200
Re: Why is this happening? Richard Harnden <richard.nospam@gmail.invalid> - 2026-03-31 17:19 +0100
Re: Why is this happening? "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2026-03-29 13:19 -0700
Re: Why is this happening? "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2026-03-29 13:26 -0700
Re: Why is this happening? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2026-03-29 14:14 -0700
Re: Why is this happening? James Kuyper <jameskuyper@alumni.caltech.edu> - 2026-03-29 20:47 -0400
Re: Why is this happening? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2026-03-29 13:57 -0700
Re: Why is this happening? David Brown <david.brown@hesbynett.no> - 2026-03-31 16:26 +0200
Re: Why is this happening? scott@slp53.sl.home (Scott Lurndal) - 2026-03-28 15:14 +0000
Re: Why is this happening? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2026-03-28 10:18 -0700
Re: Why is this happening? scott@slp53.sl.home (Scott Lurndal) - 2026-03-29 18:50 +0000
Re: Why is this happening? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2026-03-28 19:12 -0700
Re: Why is this happening? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2026-03-28 22:31 -0700
Re: Why is this happening? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2026-04-06 12:11 -0700
Re: Why is this happening? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2026-04-06 14:20 -0700
Re: Why is this happening? Michael S <already5chosen@yahoo.com> - 2026-04-07 02:05 +0300
Re: Why is this happening? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2026-04-06 17:42 -0700
Re: Why is this happening? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2026-03-29 14:43 -0700
Re: Why is this happening? Michael S <already5chosen@yahoo.com> - 2026-03-29 11:50 +0300
Re: Why is this happening? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2026-03-29 13:54 -0700
Re: Why is this happening? Michael S <already5chosen@yahoo.com> - 2026-03-30 02:05 +0300
Re: Why is this happening? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2026-03-29 16:22 -0700
Re: Why is this happening? Michael S <already5chosen@yahoo.com> - 2026-03-30 10:57 +0300
Re: Why is this happening? James Kuyper <jameskuyper@alumni.caltech.edu> - 2026-03-30 20:37 -0400
Re: Why is this happening? Michael S <already5chosen@yahoo.com> - 2026-03-31 11:48 +0300
Re: Why is this happening? James Kuyper <jameskuyper@alumni.caltech.edu> - 2026-03-31 10:51 -0400
Re: Why is this happening? candycanearter07 <candycanearter07@candycanearter07.nomail.afraid> - 2026-03-31 19:00 +0000
Re: Why is this happening? Tristan Wibberley <tristan.wibberley+netnews2@alumni.manchester.ac.uk> - 2026-04-03 02:41 +0100
csiph-web