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Groups > comp.lang.c++ > #6191

Re: Anonymous namespace

From "Bo Persson" <bop@gmb.dk>
Newsgroups comp.lang.c++
Subject Re: Anonymous namespace
Date 2011-06-04 11:33 +0200
Message-ID <94ucfdFv9lU1@mid.individual.net> (permalink)
References <is9eqf$ft8$2@reader1.panix.com><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$1@dont-email.me> <iscf0i$keo$6@reader1.panix.com>

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Ruben Safir wrote:
> On Fri, 03 Jun 2011 09:44:29 -0400, Victor Bazarov wrote:
>
>
>> The Standard prohibits the use of names with no linkage or names
>> with internal linkage as template arguments.  Only objects with
>> external linkage are allowed.
>
> Victor, you must have written the Bloomberg employment examination.
> :)
>
> What does :Only objects with external linkage are allowed.
> specifically mean?  If I create a class and a templated class in
> the same file, is that not internal and no linkage?
>

The thing with the linkage is that other rules force you to have one 
defintion of a type with external linkage. You can't have several with 
different meaning. That will make things like vector<type> mean the 
same in the whole program.

Types with internal or no linkage would break that and make things 
extremely difficult for the linker.



Bo Persson

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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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