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Groups > comp.lang.c > #102916
| From | Keith Thompson <kst-u@mib.org> |
|---|---|
| Newsgroups | comp.lang.c |
| Subject | Re: C declarations |
| Date | 2017-02-01 10:40 -0800 |
| Organization | None to speak of |
| Message-ID | <ln37fx92lt.fsf@kst-u.example.com> (permalink) |
| References | (7 earlier) <o6sha6$a6l$1@dont-email.me> <o6slob$pkf$1@dont-email.me> <o6snb9$v37$1@dont-email.me> <o6suqv$q9r$1@dont-email.me> <910e144a-fbc1-43e6-a2d2-59aa44aebb72@googlegroups.com> |
supercat@casperkitty.com writes:
> On Wednesday, February 1, 2017 at 9:30:23 AM UTC-6, David Brown wrote:
>> How can you be writing a parser, and complaining about what C does and
>> does not allow, and how other compilers match the standards, when you
>> haven't even bothered to /read/ the standards? How are you making
>> making your code at the moment - by skim-reading a couple of Wikipedia
>> articles then some trial-and-error runs with a few existing compilers?
>
> The language Dennis Ritchie designed was not processed using a formal grammar,
> nor is a formal grammar the most efficient way to parse that language. In
> addition, I don't think a formal grammar works well as a human-readable way of
> describing it either.
The earliest C reference manuals, from 1974 and 1975, describe the
syntax using a formal grammar, so the *language* certainly was defined
that way. If you're making a claim about how Dennis Ritchie's early C
compiler happened to operate, then (a) please be clear about that, and
(b) I fail see the relevance.
> Since some compiler-generation tools are easiest to use when they have a
> formal grammar as a starting point, I think it is reasonable for the Standard
> to provide a grammar and say that implementations are required to handle the
> cases described by the Standard and are not required to handle cases outside
> the grammar. Given the charter of the Committee, however, I really doubt that
> the Committee intended that compilers should be required to reject forms that
> they had accepted previously and which may be in use by production code.
Compilers are not required to reject anything other than code that uses
a #error directive.
--
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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