Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.c > #76901

Re: howmany -- What the F**k ?

Show all headers | View raw

On 11/22/2015 01:18 PM, Philip Lantz wrote:
> James Kuyper wrote:
...
>> Why not? I thought the original complaint was about the conflict with a
>> user-defined identifier with the same name. Users have no right to
>> expect a lack of conflict if they use identifiers with file scope that
>> start with an underscore. (7.1.3p1).
> 
> Am I not allowed to do this:
> 
> struct s { int _howmany; };
> 
> ?

Sorry - the rule is short enough that I should have simply quoted it,
rather than summarizing it. My summary left out an important detail
relevant to that example:

"All identifiers that begin with an underscore are always reserved for
use as identifiers with file scope in both the ordinary and tag name
spaces."

Each structure or union has a separate name space for it's members.
(6.2.3p1), so in this case _howmany is in neither the ordinary nor the
tag name space.

Many people keep things simple by never defining identifiers starting
with underscore in any context, even the ones where they're permitted. I
recommend following that approach unless and until you have memorized
7.1.3p1, and possibly even then.

Back to comp.lang.c | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

howmany -- What the F**k ? James Dow Allen <gmail@jamesdowallen.nospam> - 2015-11-18 12:01 +0000
  Re: howmany -- What the F**k ? Eric Sosman <esosman@comcast-dot-net.invalid> - 2015-11-18 07:52 -0500
    Re: howmany -- What the F**k ? "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-11-18 05:14 -0800
    Re: howmany -- What the F**k ? Keith Thompson <kst-u@mib.org> - 2015-11-18 08:26 -0800
      Re: howmany -- What the F**k ? Eric Sosman <esosman@comcast-dot-net.invalid> - 2015-11-18 11:44 -0500
        Re: howmany -- What the F**k ? Keith Thompson <kst-u@mib.org> - 2015-11-18 09:08 -0800
  Re: howmany -- What the F**k ? James Kuyper <jameskuyper@verizon.net> - 2015-11-18 08:31 -0500
  Re: howmany -- What the F**k ? Keith Thompson <kst-u@mib.org> - 2015-11-18 08:25 -0800
    Re: howmany -- What the F**k ? James Dow Allen <jdallen2000@yahoo.com> - 2015-11-18 11:58 -0800
      Re: howmany -- What the F**k ? Eric Sosman <esosman@comcast-dot-net.invalid> - 2015-11-18 15:14 -0500
        Re: howmany -- What the F**k ? James Dow Allen <jdallen2000@yahoo.com> - 2015-11-18 17:48 -0800
          Re: howmany -- What the F**k ? James Kuyper <jameskuyper@verizon.net> - 2015-11-18 21:06 -0500
          Re: howmany -- What the F**k ? Eric Sosman <esosman@comcast-dot-net.invalid> - 2015-11-19 08:23 -0500
          Re: howmany -- What the F**k ? Keith Thompson <kst-u@mib.org> - 2015-11-19 21:45 -0800
          Re: howmany -- What the F**k ? Tim Rentsch <txr@alumni.caltech.edu> - 2015-11-20 12:55 -0800
  Re: howmany -- What the F**k ? Keith Thompson <kst-u@mib.org> - 2015-11-20 03:27 -0800
    Re: howmany -- What the F**k ? Philip Lantz <prl@canterey.us> - 2015-11-21 20:40 -0800
      Re: howmany -- What the F**k ? James Kuyper <jameskuyper@verizon.net> - 2015-11-22 10:09 -0500
        Re: howmany -- What the F**k ? Philip Lantz <prl@canterey.us> - 2015-11-22 10:18 -0800
          Re: howmany -- What the F**k ? gazelle@shell.xmission.com (Kenny McCormack) - 2015-11-22 18:35 +0000
            Re: howmany -- What the F**k ? Philip Lantz <prl@canterey.us> - 2015-11-22 13:10 -0800
          Re: howmany -- What the F**k ? James Kuyper <jameskuyper@verizon.net> - 2015-11-22 13:57 -0500
            Re: howmany -- What the F**k ? Philip Lantz <prl@canterey.us> - 2015-11-22 13:02 -0800
              Re: howmany -- What the F**k ? James Kuyper <jameskuyper@verizon.net> - 2015-11-22 16:15 -0500
          Re: howmany -- What the F**k ? James Kuyper <jameskuyper@verizon.net> - 2015-11-23 06:33 -0500
            Re: howmany -- What the F**k ? gazelle@shell.xmission.com (Kenny McCormack) - 2015-11-23 12:17 +0000
            Re: howmany -- What the F**k ? Philip Lantz <prl@canterey.us> - 2015-11-23 21:09 -0800
        Re: howmany -- What the F**k ? Keith Thompson <kst-u@mib.org> - 2015-11-22 12:34 -0800
          Re: howmany -- What the F**k ? James Kuyper <jameskuyper@verizon.net> - 2015-11-22 16:18 -0500

csiph-web