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Re: VAX

Path csiph.com!eternal-september.org!feeder.eternal-september.org!.POSTED!not-for-mail
From Keith Thompson <Keith.S.Thompson+u@gmail.com>
Newsgroups comp.arch, comp.lang.c
Subject Re: VAX
Date Mon, 18 Aug 2025 21:57:59 -0700
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Cross-posted to 2 groups.

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David Brown <david.brown@hesbynett.no> writes:
> On 18.08.2025 07:18, Keith Thompson wrote:
>> Jakob Bohm <egenagwemdimtapsar@jbohm.dk> writes:
>> [...]
>>> I am unsure how GCC --pedantic deals with the standards-contrary
>>> features in the GNUC89 language, such as the different type of (foo,
>>> 'C') (GNUC says char, C89 says int), maybe specifying standard C
>>> instead of GNUC reverts those to the standard definition .
>> I'm not sure what you're referring to.  You didn't say what foo is.
>> I believe that in all versions of C, the result of a comma operator
>> has
>> the type and value of its right operand, and the type of an unprefixed
>> character constant is int.
>> Can you show a complete example where `sizeof (foo, 'C')` yields
>> sizeof (int) in any version of GNUC?
>
> Presumably that's a typo - you meant to ask when the size is /not/ the
> size of "int" ?  After all, you said yourself that "(foo, 'C')"
> evaluates to 'C' which is of type "int".  It would be very interesting
> if Jakob can show an example where gcc treats the expression as any
> other type than "int".

Yes (more of a thinko, actually).

I meant to ask about `sizeof (foo, 'C')` yielding a value *other than*
`sizeof (int)`.  Jakob implies a difference in this area between GNU C
and ISO C.  I'm not aware of any.

-- 
Keith Thompson (The_Other_Keith) Keith.S.Thompson+u@gmail.com
void Void(void) { Void(); } /* The recursive call of the void */

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Re: VAX Michael S <already5chosen@yahoo.com> - 2025-08-04 18:28 +0300
  Re: VAX Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2025-08-04 09:53 -0700
    Re: VAX Michael S <already5chosen@yahoo.com> - 2025-08-04 22:03 +0300
      Re: VAX James Kuyper <jameskuyper@alumni.caltech.edu> - 2025-08-04 15:25 -0400
        Re: VAX Michael S <already5chosen@yahoo.com> - 2025-08-04 22:40 +0300
          Re: VAX "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2025-08-04 12:44 -0700
          Re: VAX Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2025-08-04 22:21 -0700
            Re: VAX Kaz Kylheku <643-408-1753@kylheku.com> - 2025-08-05 21:25 +0000
              Re: VAX Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2025-08-05 19:14 -0700
                Re: VAX Kaz Kylheku <643-408-1753@kylheku.com> - 2025-08-06 04:31 +0000
                Re: VAX Michael S <already5chosen@yahoo.com> - 2025-08-06 11:48 +0300
              Re: VAX James Kuyper <jameskuyper@alumni.caltech.edu> - 2025-08-06 11:56 -0400
                Re: VAX Tim Rentsch <tr.17687@z991.linuxsc.com> - 2025-12-15 11:51 -0800
          Re: VAX Kaz Kylheku <643-408-1753@kylheku.com> - 2025-08-05 21:13 +0000
            Re: VAX James Kuyper <jameskuyper@alumni.caltech.edu> - 2025-08-06 11:54 -0400
              Re: VAX Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2025-08-06 13:58 -0700
                Re: VAX Tim Rentsch <tr.17687@z991.linuxsc.com> - 2026-01-06 21:33 -0800
      Re: VAX Kaz Kylheku <643-408-1753@kylheku.com> - 2025-08-05 21:08 +0000
        Re: VAX Jakob Bohm <egenagwemdimtapsar@jbohm.dk> - 2025-08-17 20:18 +0200
          Re: VAX Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2025-08-17 22:18 -0700
            Re: VAX Richard Heathfield <rjh@cpax.org.uk> - 2025-08-18 08:02 +0100
            Re: VAX David Brown <david.brown@hesbynett.no> - 2025-08-18 11:34 +0200
              Re: VAX Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2025-08-18 21:57 -0700
    Re: VAX Tim Rentsch <tr.17687@z991.linuxsc.com> - 2026-01-06 21:14 -0800

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