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Groups > comp.lang.c > #103808

Re: better atoi

From BartC <bc@freeuk.com>
Newsgroups comp.lang.c
Subject Re: better atoi
Date 2017-02-13 15:00 +0000
Organization A noiseless patient Spider
Message-ID <o7shjm$uqo$1@dont-email.me> (permalink)
References (17 earlier) <87bmu7uer4.fsf@bsb.me.uk> <o7r3ln$443$1@dont-email.me> <87y3xatlne.fsf@bsb.me.uk> <o7s5or$krf$1@dont-email.me> <8737fitaw0.fsf@bsb.me.uk>

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On 13/02/2017 14:37, Ben Bacarisse wrote:
> BartC <bc@freeuk.com> writes:

>> I take it that with a const pointer, the 'const' (one  or more of
>> them) has to go immediately after the '*'?
>
> Of course.
>
>> So 'int const *p;', while legal, is misleading as the const belongs to
>> the int. It has to be 'int * const p;'.
>
> Well obviously you can write int const *p; if that is what you mean.  If
> you mean int *const p;" then that is what you have to write.  What I
> think you mean is that you find this distinction complicated.

It's not something I've thought about much before, and possibly others 
haven't either. (Not that I've ever used const, but I have to understand 
it in others' code.)

But with 'int', you can have 'const int' or 'int const'. When a pointer 
is const, it must be '* const'; it must always go after the '*'. Or, if 
you start with int const A, and need to turn that into a const pointer, 
the '*' must go between 'int' and 'const'. Also, if you start with 'int 
*const A' and remove the *, the 'const' needs to come out too.

This is not as obvious as it would be if 'const' was always applied on 
the left of what it was modifying. (And the same applies to volatile, 
restrict, and _Atomic.)

-- 
Bartc

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Thread

better atoi fir <profesor.fir@gmail.com> - 2017-02-10 12:24 -0800
  Re: better atoi fir <profesor.fir@gmail.com> - 2017-02-10 12:35 -0800
  Re: better atoi Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2017-02-10 14:48 -0700
    Re: better atoi fir <profesor.fir@gmail.com> - 2017-02-10 14:12 -0800
      Re: better atoi Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2017-02-10 22:36 -0700
        Re: better atoi fir <profesor.fir@gmail.com> - 2017-02-11 01:07 -0800
          Re: better atoi Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2017-02-11 10:10 -0700
            Re: better atoi fir <profesor.fir@gmail.com> - 2017-02-11 09:26 -0800
              Re: better atoi Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2017-02-11 15:36 -0700
                Re: better atoi fir <profesor.fir@gmail.com> - 2017-02-12 00:18 -0800
                Re: better atoi fir <profesor.fir@gmail.com> - 2017-02-12 00:31 -0800
                Re: better atoi fir <profesor.fir@gmail.com> - 2017-02-12 03:47 -0800
                Re: better atoi fir <profesor.fir@gmail.com> - 2017-02-12 04:22 -0800
                Re: better atoi fir <profesor.fir@gmail.com> - 2017-02-12 06:08 -0800
                Re: better atoi fir <profesor.fir@gmail.com> - 2017-02-12 06:13 -0800
                Re: better atoi fir <profesor.fir@gmail.com> - 2017-02-12 07:31 -0800
                Re: better atoi fir <profesor.fir@gmail.com> - 2017-02-12 08:02 -0800
                Re: better atoi fir <profesor.fir@gmail.com> - 2017-02-12 08:08 -0800
                Re: better atoi fir <profesor.fir@gmail.com> - 2017-02-12 08:17 -0800
                Re: better atoi fir <profesor.fir@gmail.com> - 2017-02-12 08:23 -0800
                Re: better atoi Robert Latest <boblatest@yahoo.com> - 2017-02-19 11:11 +0000
            Re: better atoi Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-02-11 17:33 +0000
              Re: better atoi Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2017-02-11 15:35 -0700
                Re: better atoi "James R. Kuyper" <jameskuyper@verizon.net> - 2017-02-11 17:52 -0500
                Re: better atoi Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2017-02-11 18:53 -0700
    Re: better atoi Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-02-10 22:50 +0000
      Re: better atoi Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2017-02-10 21:59 -0700
        Re: better atoi Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-02-11 12:08 +0000
          Re: better atoi Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2017-02-11 09:39 -0700
            Re: better atoi Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-02-11 17:26 +0000
              Re: better atoi Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2017-02-11 15:30 -0700
                Re: better atoi Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-02-11 22:58 +0000
                Re: better atoi Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2017-02-11 18:48 -0700
                Re: better atoi Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-02-12 02:16 +0000
                Re: better atoi "James R. Kuyper" <jameskuyper@verizon.net> - 2017-02-12 09:57 -0500
                Re: better atoi fir <profesor.fir@gmail.com> - 2017-02-12 07:27 -0800
                Re: better atoi jameskuyper@verizon.net - 2017-02-12 08:44 -0800
                Re: better atoi fir <profesor.fir@gmail.com> - 2017-02-12 09:15 -0800
                Re: better atoi Malcolm McLean <malcolm.mclean5@btinternet.com> - 2017-02-12 09:44 -0800
                Re: better atoi BartC <bc@freeuk.com> - 2017-02-12 18:32 +0000
                Re: better atoi Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-02-12 18:56 +0000
                Re: better atoi BartC <bc@freeuk.com> - 2017-02-12 19:18 +0000
                Re: better atoi Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-02-13 00:16 +0000
                Re: better atoi BartC <bc@freeuk.com> - 2017-02-13 01:56 +0000
                Re: better atoi Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-02-13 10:44 +0000
                Re: better atoi BartC <bc@freeuk.com> - 2017-02-13 11:38 +0000
                Re: better atoi Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-02-13 14:37 +0000
                Re: better atoi BartC <bc@freeuk.com> - 2017-02-13 15:00 +0000
                Re: better atoi Keith Thompson <kst-u@mib.org> - 2017-02-12 11:15 -0800
                Re: better atoi BartC <bc@freeuk.com> - 2017-02-12 19:25 +0000
                Re: better atoi Keith Thompson <kst-u@mib.org> - 2017-02-12 11:54 -0800
                Re: better atoi supercat@casperkitty.com - 2017-02-12 13:13 -0800
    Re: better atoi Keith Thompson <kst-u@mib.org> - 2017-02-10 15:16 -0800
      Re: better atoi Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2017-02-10 22:01 -0700
        Re: better atoi Keith Thompson <kst-u@mib.org> - 2017-02-11 01:30 -0800
      Re: better atoi Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2017-02-10 22:26 -0700
    Re: better atoi Nick Bowler <nbowler@draconx.ca> - 2017-02-11 00:26 +0000
      Re: better atoi Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2017-02-10 22:32 -0700
    Re: better atoi "James R. Kuyper" <jameskuyper@verizon.net> - 2017-02-19 11:10 -0500

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