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Groups > comp.lang.c > #102919

Re: C declarations

From Keith Thompson <kst-u@mib.org>
Newsgroups comp.lang.c
Subject Re: C declarations
Date 2017-02-01 11:03 -0800
Organization None to speak of
Message-ID <lnr33h7mya.fsf@kst-u.example.com> (permalink)
References (10 earlier) <o6suqv$q9r$1@dont-email.me> <910e144a-fbc1-43e6-a2d2-59aa44aebb72@googlegroups.com> <o6t5gj$l24$1@dont-email.me> <910b80be-2f7c-4dab-860c-ed756849b91f@googlegroups.com> <o6ta6i$8c1$1@dont-email.me>

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BartC <bc@freeuk.com> writes:
[...]
> So, yes, (((((a))))); can be confusing. Because for a start, it can mean 
> different things depending on context. And it doesn't exactly look like 
> a typical declaration.

It isn't a declaration.  At block scope, it could be an expression
statement depending on how and whether `a` is declared.  At file
scope, it's invalid.

Some compilers might accept it with a warning, which is an acceptable
way to flag it as a violation of a constraint or syntax rule.
Compilers that accept it without a diagnostic are non-conforming (but
can likely be made reasonably conforming with the right options.)

-- 
Keith Thompson (The_Other_Keith) kst-u@mib.org  <http://www.ghoti.net/~kst>
Working, but not speaking, for JetHead Development, Inc.
"We must do something.  This is something.  Therefore, we must do this."
    -- Antony Jay and Jonathan Lynn, "Yes Minister"

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C declarations BartC <bc@freeuk.com> - 2017-01-30 13:00 +0000
  Re: C declarations David Brown <david.brown@hesbynett.no> - 2017-01-30 14:25 +0100
    Re: C declarations Keith Thompson <kst-u@mib.org> - 2017-01-30 11:42 -0800
  Re: C declarations Andrey Tarasevich <andreytarasevich@hotmail.com> - 2017-01-31 13:46 -0800
    Re: C declarations BartC <bc@freeuk.com> - 2017-01-31 22:13 +0000
      Re: C declarations Andrey Tarasevich <andreytarasevich@hotmail.com> - 2017-01-31 16:43 -0800
        Re: C declarations Andrey Tarasevich <andreytarasevich@hotmail.com> - 2017-01-31 17:06 -0800
      Re: C declarations Ian Collins <ian-news@hotmail.com> - 2017-02-01 17:58 +1300
        Re: C declarations luser droog <luser.droog@gmail.com> - 2017-01-31 22:42 -0800
          Re: C declarations Ian Collins <ian-news@hotmail.com> - 2017-02-01 19:48 +1300
            Re: C declarations Robert Wessel <robertwessel2@yahoo.com> - 2017-02-01 01:18 -0600
            Re: C declarations David Brown <david.brown@hesbynett.no> - 2017-02-01 10:10 +0100
              Re: C declarations BartC <bc@freeuk.com> - 2017-02-01 11:39 +0000
                Re: C declarations David Brown <david.brown@hesbynett.no> - 2017-02-01 13:55 +0100
                Re: C declarations BartC <bc@freeuk.com> - 2017-02-01 13:22 +0000
                Re: C declarations David Brown <david.brown@hesbynett.no> - 2017-02-01 16:30 +0100
                Re: C declarations Keith Thompson <kst-u@mib.org> - 2017-02-01 08:15 -0800
                Re: C declarations supercat@casperkitty.com - 2017-02-01 08:44 -0800
                Re: C declarations David Brown <david.brown@hesbynett.no> - 2017-02-01 20:56 +0100
                Re: C declarations supercat@casperkitty.com - 2017-02-01 08:29 -0800
                Re: C declarations BartC <bc@freeuk.com> - 2017-02-01 17:24 +0000
                Re: C declarations fir <profesor.fir@gmail.com> - 2017-02-01 09:55 -0800
                Re: C declarations BartC <bc@freeuk.com> - 2017-02-01 18:44 +0000
                Re: C declarations Keith Thompson <kst-u@mib.org> - 2017-02-01 11:03 -0800
                Re: C declarations fir <profesor.fir@gmail.com> - 2017-02-01 12:26 -0800
                Re: C declarations fir <profesor.fir@gmail.com> - 2017-02-01 13:03 -0800
                Re: C declarations fir <profesor.fir@gmail.com> - 2017-02-01 13:12 -0800
                Re: C declarations fir <profesor.fir@gmail.com> - 2017-02-03 16:07 -0800
                Re: C declarations Keith Thompson <kst-u@mib.org> - 2017-02-01 10:44 -0800
                Re: C declarations jameskuyper@verizon.net - 2017-02-01 11:08 -0800
                Re: C declarations Keith Thompson <kst-u@mib.org> - 2017-02-01 10:40 -0800
                Re: C declarations BartC <bc@freeuk.com> - 2017-02-01 17:04 +0000
                Re: C declarations Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-02-01 19:58 +0000
                Re: C declarations BartC <bc@freeuk.com> - 2017-02-01 21:23 +0000
                Re: C declarations Keith Thompson <kst-u@mib.org> - 2017-02-01 08:08 -0800
                Re: C declarations Andrey Tarasevich <andreytarasevich@hotmail.com> - 2017-02-01 12:45 -0800
  Re: C declarations Andrey Tarasevich <andreytarasevich@hotmail.com> - 2017-03-06 11:19 -0800
    Re: C declarations Keith Thompson <kst-u@mib.org> - 2017-03-06 11:27 -0800

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