Re: Anonymous namespace

From	Ruben Safir <mrbrklyn@panix.com>
Newsgroups	comp.lang.c++
Subject	Re: Anonymous namespace
Date	2011-06-04 02:44 +0000
Organization	PANIX Public Access Internet and UNIX, NYC
Message-ID	<isc66d$b8n$2@reader1.panix.com> (permalink)
References	(1 earlier) <unnamed-namespace-20110603040622@ram.dialup.fu-berlin.de> <is9hj6$91p$1@reader1.panix.com> <unnamed-namespaces-20110603045329@ram.dialup.fu-berlin.de> <03464db0-e118-463c-9834-171dab457e42@h9g2000yqk.googlegroups.com> <isaofu$m4c$1@dont-email.me>

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Victor Bazarov <v.bazarov@comcast.invalid> wrote:
> On 6/3/2011 4:08 AM, gwowen wrote:
>> On Jun 3, 3:54 am, r...@zedat.fu-berlin.de (Stefan Ram) wrote:
>>>> What is the point of the anonymous namespace.
>>>
>>>    Names can be hidden from the linker (from other translation
>>>    units), even if they should have external linkage.
>>
>> Can someone give the benefits of external-but-unlinkable anon-
>> namespace variables (or functions) against old-school internal linkage
>> file-scope "static" variables and functions.
> 
> The Standard prohibits the use of names with no linkage or names with 
> internal linkage as template arguments.  

Thanks Victor, but I have limited understanding of internal linkage, and
can't see how there can be no linkage to a name.  Can you expand on that
aspect of the conversation?

Ruben


> Only objects with external 
> linkage are allowed.  Hence you can't use a function declared 'static' 
> or a local type as a predicate in 'std::sort', for instance, or as the 
> functor in 'std::for_each', and so on.
> 
> V

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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