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| From | Kaz Kylheku <864-117-4973@kylheku.com> |
|---|---|
| Newsgroups | comp.std.c |
| Subject | Re: C23: asctime is obsolescent |
| Date | 2023-07-20 17:29 +0000 |
| Organization | A noiseless patient Spider |
| Message-ID | <20230720101225.383@kylheku.com> (permalink) |
| References | <875yf5ksn9.fsf@nosuchdomain.example.com> |
On 2022-11-24, Keith Thompson <Keith.S.Thompson+u@gmail.com> wrote:
> In the latest C23 draft:
> https://www.open-std.org/jtc1/sc22/wg14/www/docs/n3047.pdf
> the descriptions of the __DATE__ and __TIME__ macros refer to the
> asctime() function.
>
> That's not new. What's new is that asctime() is deprecated.
>
> Referring to a deprecated function isn't really a problem, but if
> asctime() is actually removed in a future standard the descriptions of
> __DATE__ and __TIME__ will need to be updated.
This seems like a minor oversight. __DATE__ and __TIME__ do not
depened on the semantics of asctime in any deep way; just that
__DATE__ produces a "Mmm dd yyyy" time in the same way that
asciitime would generate those fields, and similarly for __TIME__'s
"hh:mm:ss".
The documentation could refer to specific conversion specifiers of
strftime. __DATE__'s "Mmm dd yyyy" corresponds to "%b %d %Y".
The minor oversight points at a possible process problem though; it
seems that someone carelessly deprecated a function without searching
the document for occurrences of that name, and doing something about it,
resulting in requirements of a non-obsolescent feature being described
with the help of an obsolescent feature.
> It would also be nice to have a new macro that expands to the current
> date in the form "YYYY-MM-DD". I do not suggest changing the behavior
> of __DATE__, but perhaps something like __ISODATE__ could be added.
How about:
__DATEF("%Y-%M-%d")
Let's nuke trailing underscores Two leading underscores give us the
needed namespace privacy. Or just _DATEF, for that matter.
> Question: If this is done, should __DATE__ be deprecated?
Deprecating safe features used in countless code bases doesn't seem very
productive; it's just disruptive.
--
TXR Programming Language: http://nongnu.org/txr
Cygnal: Cygwin Native Application Library: http://kylheku.com/cygnal
Mastodon: @Kazinator@mstdn.ca
Back to comp.std.c | Previous | Next — Previous in thread | Next in thread | Find similar
C23: asctime is obsolescent Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2022-11-23 18:12 -0800
Re: C23: asctime is obsolescent Tim Rentsch <tr.17687@z991.linuxsc.com> - 2023-01-02 08:11 -0800
Re: C23: asctime is obsolescent Richard Damon <Richard@Damon-Family.org> - 2023-01-02 12:11 -0500
Re: C23: asctime is obsolescent Tim Rentsch <tr.17687@z991.linuxsc.com> - 2023-01-29 10:33 -0800
Re: C23: asctime is obsolescent Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2023-01-29 16:49 -0800
Re: C23: asctime is obsolescent Pete Forman <petef4+usenet@gmail.com> - 2023-01-30 23:23 +0000
Re: C23: asctime is obsolescent Tim Rentsch <tr.17687@z991.linuxsc.com> - 2023-07-20 10:11 -0700
Re: C23: asctime is obsolescent Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2023-07-20 15:04 -0700
Re: C23: asctime is obsolescent Tim Rentsch <tr.17687@z991.linuxsc.com> - 2023-08-13 15:26 -0700
Re: C23: asctime is obsolescent Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2023-08-13 16:47 -0700
Re: C23: asctime is obsolescent Jakob Bohm <jb-usenet@wisemo.com.invalid> - 2023-08-17 21:18 +0200
Re: C23: asctime is obsolescent Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2023-08-17 13:14 -0700
Re: C23: asctime is obsolescent Jakob Bohm <jb-usenet@wisemo.com.invalid> - 2023-08-18 01:26 +0200
Re: C23: asctime is obsolescent Pete Forman <petef4+usenet@gmail.com> - 2023-08-21 17:42 +0100
Re: C23: asctime is obsolescent Tim Rentsch <tr.17687@z991.linuxsc.com> - 2023-08-29 02:37 -0700
Re: C23: asctime is obsolescent Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2023-01-02 16:47 -0800
Re: C23: asctime is obsolescent David Brown <david.brown@hesbynett.no> - 2023-01-03 09:40 +0100
Re: C23: asctime is obsolescent Pete Forman <petef4+usenet@gmail.com> - 2023-01-03 15:15 +0000
Re: C23: asctime is obsolescent Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2023-01-03 10:35 -0800
Re: C23: asctime is obsolescent Phil Carmody <pc+usenet@asdf.org> - 2023-01-04 18:22 +0200
Re: C23: asctime is obsolescent James Kuyper <jameskuyper@alumni.caltech.edu> - 2023-01-04 15:04 -0500
Re: C23: asctime is obsolescent Tim Rentsch <tr.17687@z991.linuxsc.com> - 2023-01-29 10:43 -0800
Re: C23: asctime is obsolescent Tim Rentsch <tr.17687@z991.linuxsc.com> - 2023-01-02 08:20 -0800
Re: C23: asctime is obsolescent Kaz Kylheku <864-117-4973@kylheku.com> - 2023-07-20 17:29 +0000
Re: C23: asctime is obsolescent Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2023-07-20 15:20 -0700
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