Re: Anonymous namespace

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From	Ian Collins <ian-news@hotmail.com>
Newsgroups	comp.lang.c++
Subject	Re: Anonymous namespace
Date	Sat, 04 Jun 2011 16:01:38 +1200
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On 06/ 4/11 02:48 PM, Ruben Safir wrote:
> Michael Doubez<michael.doubez@free.fr>  wrote:
>> On 3 juin, 03:53, ruben safir<ru...@mrbrklyn.com>  wrote:
>>> what is the anonymous name space and how is it accessed?
>>
>> In brief, the effect is the same as C 'static' for functions and
>> global variables.
>>
> I'm confused because i thought what static did was create a variable
> which isn't destroyed between function calls and remembers its state.
> How that was accomplished, I'm uncertain of.

The static keyword suffers from overload abuse.  In the global scope, a 
static variable has local linkage, at function scope it does as you say 
above.

>> // not in class of function scope
>> static int N; // N is only visible in file
>>
>> static void foo(){ // foo can only be called in file
>> // ...
>> }
>>
>> The interest is that it also work on type definition.
>>
>> namespace {
>>
>> // Bar can only be seen in file
>> class Bar
>> {
>> // ...
>> };
>>
>> }
>>
>> And it has also the same side effect that, when included in multiple
>> translation unit (through a header by example), each translation unit
>> will have its own definition of the class. This means that, by
>> example, class member variables are not shared.
>
> I thought class member variables are not shared by defauult?

I assumed he was referring to the member variable declarations.

-- 
Ian Collins

Thread

Anonymous namespace ruben safir <ruben@mrbrklyn.com> - 2011-06-02 21:53 -0400
  Re: Anonymous namespace Pete Becker <pete@versatilecoding.com> - 2011-06-02 16:00 -1000
  Re: Anonymous namespace ruben safir <ruben@mrbrklyn.com> - 2011-06-02 22:40 -0400
    Re: Anonymous namespace ruben safir <ruben@mrbrklyn.com> - 2011-06-03 02:29 -0400
      Re: Anonymous namespace Ian Collins <ian-news@hotmail.com> - 2011-06-03 20:12 +1200
        Re: Anonymous namespace Ruben Safir <mrbrklyn@panix.com> - 2011-06-04 02:40 +0000
          Re: Anonymous namespace Ian Collins <ian-news@hotmail.com> - 2011-06-04 15:40 +1200
            Re: Anonymous namespace Ruben Safir <ruben@mrbrklyn.com> - 2011-06-04 04:56 +0000
              Re: Anonymous namespace Ian Collins <ian-news@hotmail.com> - 2011-06-04 17:19 +1200
                Re: Anonymous namespace Ruben Safir <ruben@mrbrklyn.com> - 2011-06-04 05:37 +0000
                Re: Anonymous namespace Ian Collins <ian-news@hotmail.com> - 2011-06-04 17:40 +1200
        Re: Anonymous namespace Ruben Safir <ruben@mrbrklyn.com> - 2011-06-04 05:05 +0000
          Re: Anonymous namespace Ian Collins <ian-news@hotmail.com> - 2011-06-04 17:31 +1200
            Re: Anonymous namespace Ruben Safir <ruben@mrbrklyn.com> - 2011-06-04 05:42 +0000
      Re: Anonymous namespace Öö Tiib <ootiib@hot.ee> - 2011-06-03 06:08 -0700
        Re: Anonymous namespace Ruben Safir <ruben@mrbrklyn.com> - 2011-06-04 05:09 +0000
          Re: Anonymous namespace Ian Collins <ian-news@hotmail.com> - 2011-06-04 17:32 +1200
            Re: Anonymous namespace Ruben Safir <ruben@mrbrklyn.com> - 2011-06-04 05:39 +0000
              Re: Anonymous namespace Ian Collins <ian-news@hotmail.com> - 2011-06-04 17:45 +1200
    Re: Anonymous namespace gwowen <gwowen@gmail.com> - 2011-06-03 01:08 -0700
      Re: Anonymous namespace Ian Collins <ian-news@hotmail.com> - 2011-06-03 20:17 +1200
        Re: Anonymous namespace Ruben Safir <ruben@mrbrklyn.com> - 2011-06-04 05:08 +0000
      Re: Anonymous namespace Victor Bazarov <v.bazarov@comcast.invalid> - 2011-06-03 09:44 -0400
        Re: Anonymous namespace Ruben Safir <mrbrklyn@panix.com> - 2011-06-04 02:44 +0000
        Re: Anonymous namespace Ian Collins <ian-news@hotmail.com> - 2011-06-04 15:57 +1200
        Re: Anonymous namespace Ruben Safir <ruben@mrbrklyn.com> - 2011-06-04 05:14 +0000
          Re: Anonymous namespace "Bo Persson" <bop@gmb.dk> - 2011-06-04 11:33 +0200
  Re: Anonymous namespace Michael Doubez <michael.doubez@free.fr> - 2011-06-03 03:10 -0700
    Re: Anonymous namespace Ruben Safir <mrbrklyn@panix.com> - 2011-06-04 02:48 +0000
      Re: Anonymous namespace Ian Collins <ian-news@hotmail.com> - 2011-06-04 16:01 +1200
        Re: Anonymous namespace Ruben Safir <ruben@mrbrklyn.com> - 2011-06-04 05:16 +0000
          Re: Anonymous namespace Ian Collins <ian-news@hotmail.com> - 2011-06-04 17:34 +1200
  Re: Anonymous namespace Ruben Safir <ruben@mrbrklyn.com> - 2011-06-04 05:01 +0000
    Re: Anonymous namespace Jorgen Grahn <grahn+nntp@snipabacken.se> - 2011-06-09 11:26 +0000
      Re: Anonymous namespace Ruben Safir <ruben@mrbrklyn.com> - 2011-06-10 04:12 +0000
        Re: Anonymous namespace Michael Doubez <michael.doubez@free.fr> - 2011-06-10 01:49 -0700
          Re: Anonymous namespace mrbrklyn <ceo.brooklyn@gmail.com> - 2011-06-10 10:34 -0700
          Re: Anonymous namespace mrbrklyn <ceo.brooklyn@gmail.com> - 2011-06-10 10:45 -0700
            Re: Anonymous namespace Michael Doubez <michael.doubez@free.fr> - 2011-06-12 00:01 -0700
              Re: Anonymous namespace ruben safir <ruben@mrbrklyn.com> - 2011-06-13 04:08 +0000
                Re: Anonymous namespace Michael Doubez <michael.doubez@free.fr> - 2011-06-13 08:43 -0700
        Re: Anonymous namespace Jorgen Grahn <grahn+nntp@snipabacken.se> - 2011-06-10 18:27 +0000
          Re: Anonymous namespace ruben safir <ruben@mrbrklyn.com> - 2011-06-13 05:02 +0000
            Re: Anonymous namespace Jorgen Grahn <grahn+nntp@snipabacken.se> - 2011-06-13 07:58 +0000
              Re: "namespaces were a mistake" (was: Anonymous namespace) Öö Tiib <ootiib@hot.ee> - 2011-06-13 09:56 -0700
              Re: "namespaces were a mistake" (was: Anonymous namespace) Jorgen Grahn <grahn+nntp@snipabacken.se> - 2011-06-13 19:52 +0000
                Re: "namespaces were a mistake" Miles Bader <miles@gnu.org> - 2011-06-14 13:43 +0900
                Re: "namespaces were a mistake" Miles Bader <miles@gnu.org> - 2011-06-15 07:15 +0900
                Re: "namespaces were a mistake" Jorgen Grahn <grahn+nntp@snipabacken.se> - 2011-06-15 12:01 +0000
                Re: "namespaces were a mistake" (was: Anonymous namespace) drew@furrfu.invalid (Drew Lawson) - 2011-06-14 12:24 +0000
                Re: "namespaces were a mistake" (was: Anonymous namespace) gwowen <gwowen@gmail.com> - 2011-06-14 06:00 -0700
                Re: "namespaces were a mistake" (was: Anonymous namespace) Joshua Maurice <joshuamaurice@gmail.com> - 2011-06-14 14:10 -0700
                Re: "namespaces were a mistake" Miles Bader <miles@gnu.org> - 2011-06-15 06:30 +0900
              Re: Anonymous namespace Ruben Safir <ruben@mrbrklyn.com> - 2011-06-27 16:34 +0000
                Re: Anonymous namespace Victor Bazarov <v.bazarov@comcast.invalid> - 2011-06-27 14:29 -0400

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