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Groups > comp.lang.c > #385491
| From | Keith Thompson <Keith.S.Thompson+u@gmail.com> |
|---|---|
| Newsgroups | comp.lang.c |
| Subject | Re: C23 thoughts and opinions |
| Date | 2024-06-03 16:23 -0700 |
| Organization | None to speak of |
| Message-ID | <87le3l1ugi.fsf@nosuchdomain.example.com> (permalink) |
| References | (3 earlier) <v3gou9$36n61$3@dont-email.me> <v3hrq7$1o743$1@news.xmission.com> <v3i7u3$3bp0v$1@dont-email.me> <20240602124448.704@kylheku.com> <v3lgti$325i$1@dont-email.me> |
bart <bc@freeuk.com> writes:
[...]
> At this point someone will suggest a macro this:
>
> #define forever for(;;)
When I was first learning C, I defined a macro, something like:
#define ever ;;
so that I could write
for (ever) {
/* ... */
}
At the time, I thought it was very clever.
I still think it was very clever. But I no longer think that's a
good thing.
> All that suggest sto me is that the language *needs* an explicit
> endless loop!
No, it doesn't.
There are multiple valid and idiomatic ways to write an infinite
loop in C:
for (;;)
while (1)
while (true) // requires C99 or later and #include <stdbool.h>,
// or C23 or later without the #include,
// or your own "true" macro.
There is nothing wrong with any of them. All C programmers should
immediately recognize each of them as an infinite loop. The compiler
might have to do a few different things internally to process each
one -- and that makes no difference to me as a programmer. If a
compiler generated different code for different forms, I probably
wouldn't notice. If I bothered to check, I'd be mildly curious
about the reasons, and annoyed if one form was more efficient.
A language designed from the beginning with syntactic and semantic
elegance in mind might have only one explicit form of infinite loop
(though something like "while (true)" or "while (1+1==2)" would
still be allowed). C is not that language.
I suspect some of the people in this thread saying that one form
is obviously better than the others are joking.
It doesn't matter.
--
Keith Thompson (The_Other_Keith) Keith.S.Thompson+u@gmail.com
void Void(void) { Void(); } /* The recursive call of the void */
Back to comp.lang.c | Previous | Next — Previous in thread | Next in thread | Find similar
Re: C23 thoughts and opinions Lynn McGuire <lynnmcguire5@gmail.com> - 2024-05-31 17:55 -0500
Re: C23 thoughts and opinions David Brown <david.brown@hesbynett.no> - 2024-06-01 15:30 +0200
Re: C23 thoughts and opinions Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-06-02 03:29 +0000
Re: C23 thoughts and opinions Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2024-06-01 23:31 -0700
Re: C23 thoughts and opinions gazelle@shell.xmission.com (Kenny McCormack) - 2024-06-02 13:24 +0000
Re: C23 thoughts and opinions Lew Pitcher <lew.pitcher@digitalfreehold.ca> - 2024-06-02 16:51 +0000
Re: C23 thoughts and opinions Kaz Kylheku <643-408-1753@kylheku.com> - 2024-06-02 19:52 +0000
Re: C23 thoughts and opinions Michael S <already5chosen@yahoo.com> - 2024-06-03 12:01 +0300
Re: C23 thoughts and opinions Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-06-03 13:31 -0700
Re: C23 thoughts and opinions "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-06-03 14:02 -0700
Re: C23 thoughts and opinions gazelle@shell.xmission.com (Kenny McCormack) - 2024-06-03 21:48 +0000
Re: C23 thoughts and opinions David Brown <david.brown@hesbynett.no> - 2024-06-04 10:36 +0200
Re: C23 thoughts and opinions "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-06-04 14:47 -0700
Re: C23 thoughts and opinions bart <bc@freeuk.com> - 2024-06-03 23:43 +0100
Re: C23 thoughts and opinions Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2024-06-03 16:23 -0700
Re: C23 thoughts and opinions David Brown <david.brown@hesbynett.no> - 2024-06-04 10:47 +0200
Re: C23 thoughts and opinions Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-06-04 02:20 +0000
Re: C23 thoughts and opinions David Brown <david.brown@hesbynett.no> - 2024-06-04 10:47 +0200
Re: C23 thoughts and opinions Kaz Kylheku <643-408-1753@kylheku.com> - 2024-06-04 05:25 +0000
Re: C23 thoughts and opinions Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-06-03 13:29 -0700
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