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Groups > comp.std.c > #6038

Re: Addition of nocode keyword

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On 10/30/19 12:47 PM, Nick Bowler wrote:
> On Wed, 30 Oct 2019 08:12:24 -0700, jameskuyper wrote:
>> "auto" has been a keyword for longer than C has been a language. It is,
>> in fact, a carry over from one of C's predecessor languages (I'm not
>> sure whether it was introduced in B or in BCPL). It actually made more
>> sense in the predecessor language. In C, the only places where you're
>> allowed to use "auto" are places where automatic storage duration is the
>> default, so leaving out "auto" would give the same result as using it.
>> As a result, C code almost never uses "auto". Something about it's
>> predecessor language was different (I'm not sure what) that made "auto"
>> a reasonable thing to use in that language.
> 
> In B, local variables are declared like this:
> 
>   auto x;
> 
> This syntax was permitted and works basically the same way in the original
> C standards.  In this specific case, removing 'auto' in fact changes the
> meaning of the declaration (so in C90 it was not the case, in general,
> that removing "auto" would give the same result as using it).
> 
> C99 and later standards completely removed this particular declaration
> style from the language; all remaining uses of the auto keyword are truly
> redundant.  However most modern C compilers still support this syntax
> (with the required diagnostic message) even when they implement recent
> standards.
> 

I knew that, and forgot about it, and should have modified my
explanation to accommodate those facts. However, even in C90, that usage
of "auto" could equally well have been handled by typing "int x;", which
involves (very marginally) less typing.

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Addition of nocode keyword "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2019-10-25 05:26 -0700
  Re: Addition of nocode keyword Philipp Klaus Krause <pkk@spth.de> - 2019-10-25 15:53 +0200
    Re: Addition of nocode keyword "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2019-10-25 07:26 -0700
      Re: Addition of nocode keyword Philipp Klaus Krause <pkk@spth.de> - 2020-08-04 11:00 +0200
  Re: Addition of nocode keyword "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2019-10-25 11:04 -0700
  Re: Addition of nocode keyword Ben Bacarisse <ben.usenet@bsb.me.uk> - 2019-10-25 23:42 +0100
    Re: Addition of nocode keyword "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2019-10-25 22:20 -0400
      Re: Addition of nocode keyword Ben Bacarisse <ben.usenet@bsb.me.uk> - 2019-10-26 22:52 +0100
        Re: Addition of nocode keyword Ben Bacarisse <ben.usenet@bsb.me.uk> - 2019-10-26 23:27 +0100
        Re: Addition of nocode keyword "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2019-10-26 17:19 -0700
  Re: Addition of nocode keyword Richard Damon <Richard@Damon-Family.org> - 2019-10-25 22:10 -0300
    Re: Addition of nocode keyword "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2019-10-25 19:02 -0700
      Re: Addition of nocode keyword Richard Damon <Richard@Damon-Family.org> - 2019-10-28 23:45 -0400
        Re: Addition of nocode keyword "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2019-10-29 08:15 -0400
          Re: Addition of nocode keyword "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2019-10-29 08:42 -0400
          Re: Addition of nocode keyword Richard Damon <Richard@Damon-Family.org> - 2019-10-29 22:37 -0400
            Re: Addition of nocode keyword "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2019-10-30 05:10 -0700
    Re: Addition of nocode keyword Philipp Klaus Krause <pkk@spth.de> - 2019-10-26 18:45 +0200
  Re: Addition of nocode keyword Jakob Bohm <jb-usenet@wisemo.com.invalid> - 2019-10-28 10:42 +0100
    Re: Addition of nocode keyword "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2019-10-28 18:13 -0700
      Re: Addition of nocode keyword David Spencer <spencer@panix.com> - 2019-10-29 02:55 +0000
        Re: Addition of nocode keyword "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2019-10-29 07:58 -0400
          Re: Addition of nocode keyword David Spencer <spencer@panix.com> - 2019-10-29 20:21 +0000
            Re: Addition of nocode keyword "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2019-10-29 13:31 -0700
              Re: Addition of nocode keyword jameskuyper@alumni.caltech.edu - 2019-10-29 14:47 -0700
                Re: Addition of nocode keyword "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2019-10-29 19:36 -0400
                Re: Addition of nocode keyword Richard Damon <Richard@Damon-Family.org> - 2019-10-29 22:13 -0400
                Re: Addition of nocode keyword "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2019-10-30 05:03 -0700
                Re: Addition of nocode keyword David Brown <david.brown@hesbynett.no> - 2019-10-30 09:48 +0100
                Re: Addition of nocode keyword "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2019-10-30 05:13 -0700
                Re: Addition of nocode keyword Keith Thompson <kst-u@mib.org> - 2019-10-30 08:40 -0700
                Re: Addition of nocode keyword "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2019-10-30 09:44 -0700
                Re: Addition of nocode keyword David Brown <david.brown@hesbynett.no> - 2019-10-30 18:30 +0100
                Re: Addition of nocode keyword jameskuyper@alumni.caltech.edu - 2019-10-30 08:12 -0700
                Re: Addition of nocode keyword Nick Bowler <nbowler@draconx.ca> - 2019-10-30 16:47 +0000
                Re: Addition of nocode keyword James Kuyper <jameskuyper@alumni.caltech.edu> - 2019-10-30 13:30 -0400
                Re: Addition of nocode keyword David Brown <david.brown@hesbynett.no> - 2019-10-30 18:37 +0100
                Re: Addition of nocode keyword Nick Bowler <nbowler@draconx.ca> - 2019-10-30 18:34 +0000
                Re: Addition of nocode keyword Keith Thompson <kst-u@mib.org> - 2019-10-31 10:14 -0700
                Re: Addition of nocode keyword "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2019-10-30 21:29 -0400
                Re: Addition of nocode keyword jameskuyper@alumni.caltech.edu - 2019-10-31 08:37 -0700
                Re: Addition of nocode keyword "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2019-10-31 09:38 -0700
                Re: Addition of nocode keyword David Brown <david.brown@hesbynett.no> - 2019-10-31 19:50 +0100
                Re: Addition of nocode keyword Philipp Klaus Krause <pkk@spth.de> - 2020-08-04 11:18 +0200
                Re: Addition of nocode keyword "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2019-11-01 07:20 -0700
              Re: Addition of nocode keyword David Spencer <spencer@panix.com> - 2019-10-29 23:46 +0000
                Re: Addition of nocode keyword "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2019-10-29 21:41 -0400
              Re: Addition of nocode keyword guinness.tony@gmail.com - 2019-10-30 04:36 -0700
                Re: Addition of nocode keyword Ben Bacarisse <ben.usenet@bsb.me.uk> - 2019-10-31 00:19 +0000
    Re: Addition of nocode keyword David Brown <david.brown@hesbynett.no> - 2019-10-29 14:32 +0100
      Re: Addition of nocode keyword Jakob Bohm <jb-usenet@wisemo.com.invalid> - 2019-10-29 17:41 +0100
        Re: Addition of nocode keyword David Brown <david.brown@hesbynett.no> - 2019-10-29 23:24 +0100

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