Re: Safety of casting from 'long' to 'int'

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From	Tim Rentsch <tr.17687@z991.linuxsc.com>
Newsgroups	comp.lang.c
Subject	Re: Safety of casting from 'long' to 'int'
Date	Sat, 23 May 2026 00:09:56 -0700
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Keith Thompson <Keith.S.Thompson+u@gmail.com> writes:

> Tim Rentsch <tr.17687@z991.linuxsc.com> writes:
>
>> antispam@fricas.org (Waldek Hebisch) writes:
>>
>>> [...] for some time there was a belief that correct and full BNF
>>> for C was impossible to give or too messy.
>>
>> I find this statement hard to believe.  There is nothing especially
>> difficult about a syntax for the C language.  There is of course the
>> well-known problem with typedef names, but that has long been
>> understood to be unresolvable in any context-free way (and so cannot
>> be dealt with in BNF).  Earlier versions of C (pre-K&R) had other
>> syntax for some constructs, and maybe that was the issue.  I'm at a
>> loss to understand how people could have thought a BNF for C, for
>> the post K&R version of the language, would be challenging or
>> difficult.
>
> I'm having trouble figuring out what you mean here.  You acknowledge
> that typedefs make a full BNF grammar for C impossible, and then
> you say that it's not challenging or difficult.

Because I think the problem with typedef names is orthogonal to
what Waldek was saying.  The problem with typedef names is not
solvable in a context-free grammar, and that is just as true today
as it was 50 years ago.  The syntax I am talking about is C syntax
without regard to the problem with typedef names.

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Re: Safety of casting from 'long' to 'int' Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2026-05-13 12:16 +0200
  Re: Safety of casting from 'long' to 'int' Bart <bc@freeuk.com> - 2026-05-13 13:20 +0100
  Re: Safety of casting from 'long' to 'int' cross@spitfire.i.gajendra.net (Dan Cross) - 2026-05-13 14:31 +0000
    Re: Safety of casting from 'long' to 'int' David Brown <david.brown@hesbynett.no> - 2026-05-13 17:16 +0200
      Re: Safety of casting from 'long' to 'int' cross@spitfire.i.gajendra.net (Dan Cross) - 2026-05-13 15:52 +0000
        Re: Safety of casting from 'long' to 'int' David Brown <david.brown@hesbynett.no> - 2026-05-14 11:43 +0200
    Re: Safety of casting from 'long' to 'int' Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2026-05-14 02:59 +0200
      Re: Safety of casting from 'long' to 'int' cross@spitfire.i.gajendra.net (Dan Cross) - 2026-05-14 01:39 +0000
        Re: Safety of casting from 'long' to 'int' Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2026-05-14 03:57 +0200
          Re: Safety of casting from 'long' to 'int' David Brown <david.brown@hesbynett.no> - 2026-05-14 11:49 +0200
            Re: Safety of casting from 'long' to 'int' cross@spitfire.i.gajendra.net (Dan Cross) - 2026-05-14 10:57 +0000
          Re: Safety of casting from 'long' to 'int' cross@spitfire.i.gajendra.net (Dan Cross) - 2026-05-14 10:22 +0000
      Re: Safety of casting from 'long' to 'int' Bart <bc@freeuk.com> - 2026-05-14 12:32 +0100
        Re: Safety of casting from 'long' to 'int' Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2026-05-14 16:11 -0700
          Re: Safety of casting from 'long' to 'int' Bart <bc@freeuk.com> - 2026-05-15 01:12 +0100
          Re: Safety of casting from 'long' to 'int' Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2026-05-15 02:30 +0200
        Re: Safety of casting from 'long' to 'int' Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2026-05-15 02:38 +0200
        Re: Safety of casting from 'long' to 'int' James Kuyper <jameskuyper@alumni.caltech.edu> - 2026-05-18 19:48 -0400
          Re: Safety of casting from 'long' to 'int' Bart <bc@freeuk.com> - 2026-05-19 01:12 +0100
            Re: Safety of casting from 'long' to 'int' Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2026-05-18 19:22 -0700
              Re: Safety of casting from 'long' to 'int' Bart <bc@freeuk.com> - 2026-05-19 11:31 +0100
                Re: Safety of casting from 'long' to 'int' antispam@fricas.org (Waldek Hebisch) - 2026-05-19 12:21 +0000
                Re: Safety of casting from 'long' to 'int' Bart <bc@freeuk.com> - 2026-05-19 14:15 +0100
                Re: Safety of casting from 'long' to 'int' Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2026-05-19 14:14 -0700
                Re: Safety of casting from 'long' to 'int' Tim Rentsch <tr.17687@z991.linuxsc.com> - 2026-05-22 21:58 -0700
                Re: Safety of casting from 'long' to 'int' Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2026-05-22 23:23 -0700
                Re: Safety of casting from 'long' to 'int' Tim Rentsch <tr.17687@z991.linuxsc.com> - 2026-05-23 00:09 -0700
                Re: Safety of casting from 'long' to 'int' Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2026-05-23 04:13 -0700
                Re: Safety of casting from 'long' to 'int' Tim Rentsch <tr.17687@z991.linuxsc.com> - 2026-05-24 04:37 -0700
                Re: Safety of casting from 'long' to 'int' Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2026-05-19 14:12 -0700
                Re: Safety of casting from 'long' to 'int' Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2026-05-20 04:20 +0200
                Re: Safety of casting from 'long' to 'int' James Kuyper <jameskuyper@alumni.caltech.edu> - 2026-05-19 19:00 -0400
                Re: Safety of casting from 'long' to 'int' Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2026-05-19 16:56 -0700
            Re: Safety of casting from 'long' to 'int' James Kuyper <jameskuyper@alumni.caltech.edu> - 2026-05-19 11:31 -0400
      Re: Safety of casting from 'long' to 'int' Tim Rentsch <tr.17687@z991.linuxsc.com> - 2026-05-14 08:37 -0700
        Re: Safety of casting from 'long' to 'int' Bart <bc@freeuk.com> - 2026-05-14 17:00 +0100
          Re: Safety of casting from 'long' to 'int' Tim Rentsch <tr.17687@z991.linuxsc.com> - 2026-05-14 09:44 -0700
            Re: Safety of casting from 'long' to 'int' Bart <bc@freeuk.com> - 2026-05-14 18:57 +0100
          Re: Safety of casting from 'long' to 'int' David Brown <david.brown@hesbynett.no> - 2026-05-14 18:51 +0200
            Re: Safety of casting from 'long' to 'int' Bart <bc@freeuk.com> - 2026-05-14 19:19 +0100
              Re: Safety of casting from 'long' to 'int' David Brown <david.brown@hesbynett.no> - 2026-05-14 20:50 +0200
                Re: Safety of casting from 'long' to 'int' Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2026-05-15 02:52 +0200
                Re: Safety of casting from 'long' to 'int' Bart <bc@freeuk.com> - 2026-05-15 02:07 +0100
                Re: Safety of casting from 'long' to 'int' Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2026-05-15 03:39 +0200
                Re: Safety of casting from 'long' to 'int' Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2026-05-14 19:04 -0700
                Re: Safety of casting from 'long' to 'int' David Brown <david.brown@hesbynett.no> - 2026-05-15 10:27 +0200
                Re: Safety of casting from 'long' to 'int' tTh <tth@none.invalid> - 2026-05-15 12:25 +0200
          Re: Safety of casting from 'long' to 'int' Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2026-05-14 16:40 -0700
            Re: Safety of casting from 'long' to 'int' Bart <bc@freeuk.com> - 2026-05-15 01:31 +0100
              Re: Safety of casting from 'long' to 'int' Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2026-05-14 17:52 -0700
              Re: Safety of casting from 'long' to 'int' David Brown <david.brown@hesbynett.no> - 2026-05-15 10:32 +0200
                Re: Safety of casting from 'long' to 'int' Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2026-05-15 02:35 -0700
                Re: Safety of casting from 'long' to 'int' Bart <bc@freeuk.com> - 2026-05-15 11:38 +0100
                Re: Safety of casting from 'long' to 'int' cross@spitfire.i.gajendra.net (Dan Cross) - 2026-05-15 11:35 +0000
                Re: Safety of casting from 'long' to 'int' Bart <bc@freeuk.com> - 2026-05-15 13:05 +0100
                Re: Safety of casting from 'long' to 'int' David Brown <david.brown@hesbynett.no> - 2026-05-15 13:58 +0200
                Re: Safety of casting from 'long' to 'int' Bart <bc@freeuk.com> - 2026-05-15 14:54 +0100
                Re: Safety of casting from 'long' to 'int' Bart <bc@freeuk.com> - 2026-05-15 15:00 +0100
                Re: Safety of casting from 'long' to 'int' scott@slp53.sl.home (Scott Lurndal) - 2026-05-15 16:01 +0000
                Re: Safety of casting from 'long' to 'int' Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2026-05-15 12:23 -0700
                Re: Safety of casting from 'long' to 'int' Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2026-05-15 12:54 -0700
                Re: Safety of casting from 'long' to 'int' Bart <bc@freeuk.com> - 2026-05-15 21:39 +0100
                Re: Safety of casting from 'long' to 'int' Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2026-05-15 14:14 -0700
                Re: Safety of casting from 'long' to 'int' Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2026-05-16 00:44 +0200
                Re: Safety of casting from 'long' to 'int' Bart <bc@freeuk.com> - 2026-05-16 00:36 +0100
          Re: Safety of casting from 'long' to 'int' Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2026-05-15 02:46 +0200

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