Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.c > #61694

Re: Implementing static_assert

From James Kuyper <jameskuyper@verizon.net>
Newsgroups comp.lang.c
Subject Re: Implementing static_assert
Date 2015-05-07 12:30 -0400
Organization A noiseless patient Spider
Message-ID <mig3tk$s56$1@dont-email.me> (permalink)
References <midqsq$81d$1@dont-email.me> <mif6mb$ffc$1@dont-email.me> <MPG.2fb4e3efad69db5721@news.eternal-september.org> <miflb1$36l$1@dont-email.me> <87d22cjrkv.fsf@kst-u.example.com>

Show all headers | View raw

On 05/07/2015 12:11 PM, Keith Thompson wrote:
> David Brown <david.brown@hesbynett.no> writes:
>> On 07/05/15 12:53, Philip Lantz wrote:
>>> David Brown wrote:
>>>> Conversely, I would consider turning an "old-fashioned" assert into a
>>>> static assertion if the expression is compile-time constant.
>>>
>>> No, you can't do that--even if the expression in an assert is a compile-
>>> time constant, the program can't abort unless/until it is executed. 
> [...]
> 
>> That's why I said I would /consider/ doing this - I realise there are
>> cases where you might want to avoid a compile-time error here.
> 
> Yes -- and those cases are *all uses of assert()*.

I don't think so. I've frequently seen assert() used in cases where
_Static_assert() would have been preferred, but was not used because it
wasn't available yet. I think that this may be true of many, and perhaps
most, of the assert()s where the argument is a compile-time constant.
-- 
James Kuyper

Back to comp.lang.c | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Implementing static_assert jacobnavia <jacob@jacob.remcomp.fr> - 2015-05-06 21:44 +0200
  Re: Implementing static_assert Keith Thompson <kst-u@mib.org> - 2015-05-06 13:28 -0700
    Re: Implementing static_assert jacobnavia <jacob@jacob.remcomp.fr> - 2015-05-06 22:55 +0200
      Re: Implementing static_assert Keith Thompson <kst-u@mib.org> - 2015-05-06 14:30 -0700
        Re: Implementing static_assert Martin Shobe <martin.shobe@yahoo.com> - 2015-05-06 18:07 -0500
          Re: Implementing static_assert Keith Thompson <kst-u@mib.org> - 2015-05-06 17:34 -0700
          Re: Implementing static_assert David Brown <david.brown@hesbynett.no> - 2015-05-07 09:44 +0200
      Re: Implementing static_assert Tim Rentsch <txr@alumni.caltech.edu> - 2015-05-07 12:37 -0700
  Re: Implementing static_assert David Brown <david.brown@hesbynett.no> - 2015-05-07 10:11 +0200
    Re: Implementing static_assert Ian Collins <ian-news@hotmail.com> - 2015-05-07 22:13 +1200
      Re: Implementing static_assert jacobnavia <jacob@jacob.remcomp.fr> - 2015-05-07 12:24 +0200
        Re: Implementing static_assert Ian Collins <ian-news@hotmail.com> - 2015-05-07 22:33 +1200
          Re: Implementing static_assert David Brown <david.brown@hesbynett.no> - 2015-05-07 14:30 +0200
    Re: Implementing static_assert Philip Lantz <prl@canterey.us> - 2015-05-07 03:53 -0700
      Re: Implementing static_assert David Brown <david.brown@hesbynett.no> - 2015-05-07 14:21 +0200
        Re: Implementing static_assert Keith Thompson <kst-u@mib.org> - 2015-05-07 09:11 -0700
          Re: Implementing static_assert James Kuyper <jameskuyper@verizon.net> - 2015-05-07 12:30 -0400
            Re: Implementing static_assert James Kuyper <jameskuyper@verizon.net> - 2015-05-07 12:55 -0400
    Re: Implementing static_assert Keith Thompson <kst-u@mib.org> - 2015-05-07 09:06 -0700
  Re: Implementing static_assert jacobnavia <jacob@jacob.remcomp.fr> - 2015-05-07 19:43 +0200
    Re: Implementing static_assert Tim Rentsch <txr@alumni.caltech.edu> - 2015-05-07 16:10 -0700

csiph-web