Re: CAlive and char* p1, p2 --vs-- char *p1, p2

From	Ben Bacarisse <ben.usenet@bsb.me.uk>
Newsgroups	comp.lang.c
Subject	Re: CAlive and char* p1, p2 --vs-- char *p1, p2
Date	2015-10-31 21:43 +0000
Organization	A noiseless patient Spider
Message-ID	<87k2q290je.fsf@bsb.me.uk> (permalink)
References	(2 earlier) <71c21d38-b2fb-44ac-86b5-771c8cdc2dc8@googlegroups.com> <87d1vvaxox.fsf@bsb.me.uk> <7aa592e1-ca1e-4717-8fd9-6c3cfe0ebfe4@googlegroups.com> <87lhaiajtx.fsf@bsb.me.uk> <aef40968-6979-4aa4-84ef-485075c3187c@googlegroups.com>

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"Rick C. Hodgin" <rick.c.hodgin@gmail.com> writes:

> On Saturday, October 31, 2015 at 4:01:37 PM UTC-4, Ben Bacarisse wrote:
>> "Rick C. Hodgin" <rick.c.hodgin@gmail.com> writes:
>> 
>> > On Saturday, October 31, 2015 at 11:02:19 AM UTC-4, Ben Bacarisse wrote:
>> >> "Rick C. Hodgin" <rick.c.hodgin@gmail.com> writes:
>> >> 
>> >> > On Saturday, October 31, 2015 at 7:23:55 AM UTC-4, Ben Bacarisse wrote:
>> <snip>
>> >> >> What will the following mean:
>> <snip>
>> >> >> 03:  char *const* p, q;
>> <snip>
>> >> > 03:  Syntax error
>> >> 
>> >> Why the syntax error?
>> >
>> > The CAlive parser would see the source code sequence:
>> >
>> >     char *const* p, q;
>> >
>> > Broken out to:
>> >
>> >     [char][whitespace][*][const][*][whitespace][p][,][whitespace][q][;]
>> >
>> > Reduced to:  [char][*][const][*][p][,][q]
>> > Reduced to:  [char][*const]<!--error-->[*][p][,][q]
>> >
>> > It would not see a comma between [*const] and [*], and would attach
>> > the syntax error to the line and component, and it would stop parsing
>> > at that point, and insert an inquiry for the statement.
>> 
>> I think you missed my point.  My question was *why* you decided that
>> this would be a syntax error.  In C it declares p to be pointer to a
>> const pointer to char.
>
> CAlive does not support crossing types in a single step like that, as
> with one pointer.
>
> CAlive allows pointers, and pointer-to-pointers of the same type, but
> in order to cross a type it must go through something, such as a class,
> angel, or struct, which serves to document the operation taking place,
> so as to indicate clearly what it's doing (by its associated name), and
> why the subsequent layers of data are required to get there.

OK.  In short you've decided that CAlive can't directly declare a
pointer to a pointer that is const.  That pushes the question to why you
decided this, but let's not go down that rabbit hole.

> If you'll remember, many moons ago...
>
> We've had this discussion before.  I made the comment that in all of
> my programming experience I've never seen the need to go further than
> pointers, and pointers-to-pointers.

The type I asked about is a pointer to a pointer.

<snip>
-- 
Ben.

Thread

CAlive and char* p1, p2 --vs-- char *p1, p2 "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-30 19:40 -0700
  Re: CAlive and char* p1, p2 --vs-- char *p1, p2 supercat@casperkitty.com - 2015-10-30 19:50 -0700
    Re: CAlive and char* p1, p2 --vs-- char *p1, p2 "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-30 19:56 -0700
      Re: CAlive and char* p1, p2 --vs-- char *p1, p2 supercat@casperkitty.com - 2015-10-31 13:00 -0700
  Re: CAlive and char* p1, p2 --vs-- char *p1, p2 Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-31 11:23 +0000
    Re: CAlive and char* p1, p2 --vs-- char *p1, p2 "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-31 07:45 -0700
      Re: CAlive and char* p1, p2 --vs-- char *p1, p2 Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-31 15:02 +0000
        Re: CAlive and char* p1, p2 --vs-- char *p1, p2 "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-31 10:52 -0700
          Re: CAlive and char* p1, p2 --vs-- char *p1, p2 Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-31 20:01 +0000
            Re: CAlive and char* p1, p2 --vs-- char *p1, p2 "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-31 13:51 -0700
              Re: CAlive and char* p1, p2 --vs-- char *p1, p2 Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-31 21:43 +0000
                Re: CAlive and char* p1, p2 --vs-- char *p1, p2 "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-31 17:04 -0700
                Re: CAlive and char* p1, p2 --vs-- char *p1, p2 Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-11-01 01:17 +0000
                Re: CAlive and char* p1, p2 --vs-- char *p1, p2 "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-31 19:20 -0700
              Re: CAlive and char* p1, p2 --vs-- char *p1, p2 "Chris M. Thomasson" <nospam@nospam.nospam> - 2015-10-31 16:02 -0700
                Re: CAlive and char* p1, p2 --vs-- char *p1, p2 "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-31 17:06 -0700
  Re: CAlive and char* p1, p2 --vs-- char *p1, p2 Bartc <bc@freeuk.com> - 2015-10-31 13:54 +0000
    Re: CAlive and char* p1, p2 --vs-- char *p1, p2 "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-31 07:52 -0700
      Re: CAlive and char* p1, p2 --vs-- char *p1, p2 Richard Damon <Richard@Damon-Family.org> - 2015-10-31 11:16 -0400
        Re: CAlive and char* p1, p2 --vs-- char *p1, p2 "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-31 10:08 -0700
          Re: CAlive and char* p1, p2 --vs-- char *p1, p2 Richard Damon <Richard@Damon-Family.org> - 2015-10-31 14:00 -0400
        Re: CAlive and char* p1, p2 --vs-- char *p1, p2 gazelle@shell.xmission.com (Kenny McCormack) - 2015-10-31 17:41 +0000
          Re: CAlive and char* p1, p2 --vs-- char *p1, p2 "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-31 11:03 -0700
            Re: CAlive and char* p1, p2 --vs-- char *p1, p2 Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-31 20:04 +0000
              Re: CAlive and char* p1, p2 --vs-- char *p1, p2 "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-31 13:56 -0700
                Re: CAlive and char* p1, p2 --vs-- char *p1, p2 Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-31 21:49 +0000
        Re: CAlive and char* p1, p2 --vs-- char *p1, p2 Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-10-31 12:20 -0700
  Re: CAlive and char* p1, p2 --vs-- char *p1, p2 glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-11-01 04:17 +0000
    Re: CAlive and char* p1, p2 --vs-- char *p1, p2 Chad <cdalten@gmail.com> - 2015-11-01 00:02 -0700
  Re: CAlive and char* p1, p2 --vs-- char *p1, p2 Ian Collins <ian-news@hotmail.com> - 2015-11-01 20:30 +1300
  Re: CAlive and char* p1, p2 --vs-- char *p1, p2 David Brown <david.brown@hesbynett.no> - 2015-11-01 23:48 +0100
    Re: CAlive and char* p1, p2 --vs-- char *p1, p2 "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-11-01 16:54 -0800
      Re: CAlive and char* p1, p2 --vs-- char *p1, p2 David Brown <david.brown@hesbynett.no> - 2015-11-02 02:05 +0100
        Re: CAlive and char* p1, p2 --vs-- char *p1, p2 "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-11-01 17:12 -0800
          Re: CAlive and char* p1, p2 --vs-- char *p1, p2 "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-11-01 17:23 -0800
    Re: CAlive and char* p1, p2 --vs-- char *p1, p2 Tim Rentsch <txr@alumni.caltech.edu> - 2015-11-02 02:28 -0800
      Re: CAlive and char* p1, p2 --vs-- char *p1, p2 raltbos@xs4all.nl (Richard Bos) - 2015-11-10 15:57 +0000
      Re: CAlive and char* p1, p2 --vs-- char *p1, p2 "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-11-10 08:11 -0800
        Re: CAlive and char* p1, p2 --vs-- char *p1, p2 Gareth Owen <gwowen@gmail.com> - 2015-11-10 18:34 +0000
          Re: CAlive and char* p1, p2 --vs-- char *p1, p2 "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-11-10 10:55 -0800
        Re: CAlive and char* p1, p2 --vs-- char *p1, p2 Tim Rentsch <txr@alumni.caltech.edu> - 2015-11-10 21:08 -0800
          Re: CAlive and char* p1, p2 --vs-- char *p1, p2 "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-11-12 05:14 -0800
            Re: CAlive and char* p1, p2 --vs-- char *p1, p2 BartC <bc@freeuk.com> - 2015-11-12 13:31 +0000
              Re: CAlive and char* p1, p2 --vs-- char *p1, p2 "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-11-12 06:21 -0800
            Re: CAlive and char* p1, p2 --vs-- char *p1, p2 Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-11-12 14:29 +0000
              Re: CAlive and char* p1, p2 --vs-- char *p1, p2 "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-11-12 06:36 -0800
              Re: CAlive and char* p1, p2 --vs-- char *p1, p2 supercat@casperkitty.com - 2015-11-12 06:45 -0800
                Re: CAlive and char* p1, p2 --vs-- char *p1, p2 "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-11-12 06:48 -0800
                Re: CAlive and char* p1, p2 --vs-- char *p1, p2 David Brown <david.brown@hesbynett.no> - 2015-11-12 15:59 +0100
                Re: CAlive and char* p1, p2 --vs-- char *p1, p2 "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-11-12 07:03 -0800
                Re: CAlive and char* p1, p2 --vs-- char *p1, p2 gazelle@shell.xmission.com (Kenny McCormack) - 2015-11-12 16:21 +0000
                Re: CAlive and char* p1, p2 --vs-- char *p1, p2 supercat@casperkitty.com - 2015-11-12 09:09 -0800
                Re: CAlive and char* p1, p2 --vs-- char *p1, p2 "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-11-12 09:16 -0800
                Re: CAlive and char* p1, p2 --vs-- char *p1, p2 "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-11-12 09:46 -0800
                Re: CAlive and char* p1, p2 --vs-- char *p1, p2 supercat@casperkitty.com - 2015-11-12 09:51 -0800
                Re: CAlive and char* p1, p2 --vs-- char *p1, p2 "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-11-12 10:01 -0800
                Re: CAlive and char* p1, p2 --vs-- char *p1, p2 supercat@casperkitty.com - 2015-11-12 11:10 -0800
                Re: CAlive and char* p1, p2 --vs-- char *p1, p2 "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-11-12 11:31 -0800
                Re: CAlive and char* p1, p2 --vs-- char *p1, p2 supercat@casperkitty.com - 2015-11-12 12:14 -0800
                Re: CAlive and char* p1, p2 --vs-- char *p1, p2 "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-11-12 12:18 -0800

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