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Groups > comp.lang.c > #75788

Re: memset extensions

From James Kuyper <jameskuyper@verizon.net>
Newsgroups comp.lang.c
Subject Re: memset extensions
Date 2015-11-11 16:01 -0500
Organization Self
Message-ID <5643AC9B.2030305@verizon.net> (permalink)
References <n1v3pk$967$1@dont-email.me> <n1vctl$jg8$1@solani.org> <n1vqhm$u0o$2@dont-email.me> <87lha4ladh.fsf@bsb.me.uk> <n207p4$o0l$2@dont-email.me>

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On 11/11/2015 03:19 PM, jacobnavia wrote:
> Le 11/11/2015 18:22, Ben Bacarisse a écrit :
>> The controlling expression of _Generic does not
>> undergo promotion.
> 
> When you type
> 
> 'A' in C it is the same as you would have typed "65".

The numeric valued depends upon which encoding is supported by the
implementation, but the fact that character constants have 'int' type is
independent of that issue.

> This is done in the lexical analysis phase.

True. But it's not a promotion.

If you want to do something memset()-like using 'A' to initialize one
byte at a time, just use the original memset(). Your extended versions
of memset() would only be used when you want to initialize using
something other than a narrow character constant - which means that
_Generic could be used to determine the appropriate way to handle it.

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memset extensions jacobnavia <jacob@jacob.remcomp.fr> - 2015-11-11 11:05 +0100
  Re: memset extensions Lőrinczy Zsigmond <zsiga@nospam.for.me> - 2015-11-11 11:08 +0100
    Re: memset extensions "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-11-11 04:56 -0800
  Re: memset extensions Philipp Klaus Krause <pkk@spth.de> - 2015-11-11 13:39 +0100
    Re: memset extensions jacobnavia <jacob@jacob.remcomp.fr> - 2015-11-11 17:34 +0100
      Re: memset extensions Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-11-11 17:22 +0000
        Re: memset extensions jacobnavia <jacob@jacob.remcomp.fr> - 2015-11-11 21:19 +0100
          Re: memset extensions Keith Thompson <kst-u@mib.org> - 2015-11-11 12:51 -0800
          Re: memset extensions James Kuyper <jameskuyper@verizon.net> - 2015-11-11 16:01 -0500
            Re: memset extensions jacobnavia <jacob@jacob.remcomp.fr> - 2015-11-11 22:03 +0100
              Re: memset extensions Keith Thompson <kst-u@mib.org> - 2015-11-11 13:19 -0800
                Re: memset extensions jacobnavia <jacob@jacob.remcomp.fr> - 2015-11-11 22:45 +0100
                Re: memset extensions James Kuyper <jameskuyper@verizon.net> - 2015-11-11 16:51 -0500
                Re: memset extensions jacobnavia <jacob@jacob.remcomp.fr> - 2015-11-11 23:01 +0100
                Re: memset extensions James Kuyper <jameskuyper@verizon.net> - 2015-11-11 17:29 -0500
                Re: memset extensions jacobnavia <jacob@jacob.remcomp.fr> - 2015-11-11 23:36 +0100
                Re: memset extensions Keith Thompson <kst-u@mib.org> - 2015-11-11 15:00 -0800
              Re: memset extensions James Kuyper <jameskuyper@verizon.net> - 2015-11-11 16:48 -0500
          Re: memset extensions Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-11-11 22:15 +0000
  Re: memset extensions James Kuyper <jameskuyper@verizon.net> - 2015-11-11 08:05 -0500
  Re: memset extensions Eric Sosman <esosman@comcast-dot-net.invalid> - 2015-11-11 08:31 -0500
    Re: memset extensions jacobnavia <jacob@jacob.remcomp.fr> - 2015-11-11 17:34 +0100
  Re: memset extensions Les Cargill <lcargill99@comcast.com> - 2015-11-11 08:30 -0600
    Re: memset extensions Eric Sosman <esosman@comcast-dot-net.invalid> - 2015-11-11 09:48 -0500
    Re: memset extensions gwowen <gwowen@gmail.com> - 2015-11-11 07:55 -0800
    Re: memset extensions James Kuyper <jameskuyper@verizon.net> - 2015-11-11 11:24 -0500
    Re: memset extensions jacobnavia <jacob@jacob.remcomp.fr> - 2015-11-11 17:32 +0100
      Re: memset extensions Eric Sosman <esosman@comcast-dot-net.invalid> - 2015-11-11 11:44 -0500
      Re: memset extensions raltbos@xs4all.nl (Richard Bos) - 2015-11-17 22:53 +0000
        Re: memset extensions supercat@casperkitty.com - 2015-11-17 15:37 -0800
          Re: memset extensions raltbos@xs4all.nl (Richard Bos) - 2015-11-20 11:27 +0000
            Re: memset extensions supercat@casperkitty.com - 2015-11-20 08:45 -0800
  Re: memset extensions supercat@casperkitty.com - 2015-11-11 08:25 -0800
  Re: memset extensions Keith Thompson <kst-u@mib.org> - 2015-11-11 09:09 -0800
    Re: memset extensions supercat@casperkitty.com - 2015-11-11 09:18 -0800
      Re: memset extensions Keith Thompson <kst-u@mib.org> - 2015-11-11 10:57 -0800
    Re: memset extensions jacobnavia <jacob@jacob.remcomp.fr> - 2015-11-11 21:17 +0100

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