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| From | Ike Naar <ike@iceland.freeshell.org> |
|---|---|
| Newsgroups | comp.lang.c |
| Subject | Re: Baby X |
| Date | 2013-08-18 20:15 +0000 |
| Organization | A noiseless patient Spider |
| Message-ID | <slrn3vfsl12aq8.klg.ike@iceland.freeshell.org> (permalink) |
| References | (14 earlier) <ku8fjm$juj$1@dont-email.me> <4bQNt.683$nK2.441@en-nntp-11.dc1.easynews.com> <lntxiwlz3c.fsf@nuthaus.mib.org> <MPG.2c79fbfac4cd825d7@news.eternal-september.org> <kur51b$rkm$1@dont-email.me> |
On 2013-08-18, James Kuyper <jameskuyper@verizon.net> wrote:
> On 08/18/2013 01:31 AM, Philip Lantz wrote:
> ...
>> Unfortunately, this would require a diagnostic for the following:
>>
>> int func(void) {
>> if (cond) {
>> cleanup_and_exit(); // unconditionally calls exit()
>> }
>> else {
>> return 0;
>> }
>> }
>>
>> unless you also add a noreturn attribute.
>
> Too late - _Noreturn was added in C2011. You can use noreturn as an
> equivalent, so long as you #include <stdnoreturn.h> first.
But with different semantics.
_Noreturn in C2011 applies to an entire function and indicates
that the function shall never return to its caller.
If the _Noreturn specifier were used with func as given above, the
behaviour would be undefined if the flow would reach the 'else'
branch, returning 0. Also, the standard recommends that the
implementation produce a diagnostic message for the function
since it appears to be capable to return to its caller.
Philip was apparently looking for a noreturn attribute that would
prevent a diagnostic for not returning a value in the 'if (cond)'
branch.
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Re: Baby X Ian Collins <ian-news@hotmail.com> - 2013-08-07 07:19 +1200
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Re: Baby X Ian Collins <ian-news@hotmail.com> - 2013-08-07 07:49 +1200
Re: Baby X Malcolm McLean <malcolm.mclean5@btinternet.com> - 2013-08-06 15:17 -0700
Re: Baby X Ben Bacarisse <ben.usenet@bsb.me.uk> - 2013-08-07 00:29 +0100
Re: Baby X Ian Collins <ian-news@hotmail.com> - 2013-08-07 13:45 +1200
Re: Baby X Malcolm McLean <malcolm.mclean5@btinternet.com> - 2013-08-07 03:22 -0700
Re: Baby X James Kuyper <jameskuyper@verizon.net> - 2013-08-07 06:36 -0400
Re: Baby X Dr Nick <nospam-4@temporary-address.org.uk> - 2013-08-10 20:04 +0100
Re: Baby X Kelsey Bjarnason <kbjarnason@gmail.com> - 2013-08-09 17:28 +0000
Re: Baby X Malcolm McLean <malcolm.mclean5@btinternet.com> - 2013-08-09 12:43 -0700
Re: Baby X glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2013-08-09 20:01 +0000
[OT] Re: Baby X Eric Sosman <esosman@comcast-dot-net.invalid> - 2013-08-09 16:30 -0400
Re: Baby X Keith Thompson <kst-u@mib.org> - 2013-08-09 14:12 -0700
Re: Baby X Dr Nick <nospam-4@temporary-address.org.uk> - 2013-08-10 20:11 +0100
Re: Baby X Robert Wessel <robertwessel2@yahoo.com> - 2013-08-10 14:41 -0500
Re: Baby X James Kuyper <jameskuyper@verizon.net> - 2013-08-10 21:34 -0400
Re: Baby X Dr Nick <nospam-4@temporary-address.org.uk> - 2013-08-11 11:02 +0100
Re: Baby X James Kuyper <jameskuyper@verizon.net> - 2013-08-11 12:54 -0400
Re: Baby X Richard Damon <Richard@Damon-Family.org> - 2013-08-11 13:51 -0400
Re: Baby X James Kuyper <jameskuyper@verizon.net> - 2013-08-11 14:10 -0400
Re: Baby X Richard Damon <Richard@Damon-Family.org> - 2013-08-11 14:43 -0400
Re: Baby X Keith Thompson <kst-u@mib.org> - 2013-08-11 14:03 -0700
Re: Baby X Richard Damon <Richard@Damon-Family.org> - 2013-08-11 17:57 -0400
Re: Baby X Keith Thompson <kst-u@mib.org> - 2013-08-11 18:37 -0700
Re: Baby X glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2013-08-12 04:12 +0000
Re: Baby X Dr Nick <nospam-4@temporary-address.org.uk> - 2013-08-12 07:42 +0100
Re: Baby X Keith Thompson <kst-u@mib.org> - 2013-08-12 09:10 -0700
Re: Baby X Philip Lantz <prl@canterey.us> - 2013-08-17 22:31 -0700
Re: Baby X James Kuyper <jameskuyper@verizon.net> - 2013-08-18 14:50 -0400
Re: Baby X Ike Naar <ike@iceland.freeshell.org> - 2013-08-18 20:15 +0000
Re: Baby X James Kuyper <jameskuyper@verizon.net> - 2013-08-18 16:30 -0400
Re: Baby X Ike Naar <ike@iceland.freeshell.org> - 2013-08-18 21:03 +0000
Re: Baby X Ian Collins <ian-news@hotmail.com> - 2013-08-20 13:09 +1200
Re: Baby X Phil Carmody <thefatphil_demunged@yahoo.co.uk> - 2013-08-20 12:24 +0300
Re: Baby X Ben Bacarisse <ben.usenet@bsb.me.uk> - 2013-08-20 13:11 +0100
Re: Baby X Keith Thompson <kst-u@mib.org> - 2013-08-20 08:33 -0700
Re: Baby X Phil Carmody <thefatphil_demunged@yahoo.co.uk> - 2013-08-23 11:32 +0300
Re: Baby X Ian Collins <ian-news@hotmail.com> - 2013-08-21 08:01 +1200
Re: Baby X Keith Thompson <kst-u@mib.org> - 2013-08-11 13:57 -0700
Re: Baby X James Kuyper <jameskuyper@verizon.net> - 2013-08-10 21:29 -0400
Re: Baby X Malcolm McLean <malcolm.mclean5@btinternet.com> - 2013-08-10 22:04 -0700
Re: Baby X Ike Naar <ike@iceland.freeshell.org> - 2013-08-09 20:16 +0000
Re: Baby X Malcolm McLean <malcolm.mclean5@btinternet.com> - 2013-08-09 15:29 -0700
Re: Baby X Ike Naar <ike@iceland.freeshell.org> - 2013-08-10 05:45 +0000
Re: Baby X Malcolm McLean <malcolm.mclean5@btinternet.com> - 2013-08-10 03:18 -0700
Re: Baby X Ike Naar <ike@iceland.freeshell.org> - 2013-08-10 17:02 +0000
Re: Baby X Ike Naar <ike@ukato.freeshell.org> - 2013-08-06 21:00 +0000
Re: Baby X Malcolm McLean <malcolm.mclean5@btinternet.com> - 2013-08-06 15:07 -0700
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