MESSAGE
DATE | 2011-06-05 |
FROM | Ruben Safir
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SUBJECT | Subject: [NYLXS - HANGOUT] (fwd) Re: Anonymous namespace
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From owner-hangout-outgoing-at-mrbrklyn.com Sun Jun 5 00:27:50 2011 Return-Path: X-Original-To: archive-at-mrbrklyn.com Delivered-To: archive-at-mrbrklyn.com Received: by www2.mrbrklyn.com (Postfix) id D5391100BD0; Sun, 5 Jun 2011 00:27:48 -0400 (EDT) Delivered-To: hangout-outgoing-at-www2.mrbrklyn.com Received: by www2.mrbrklyn.com (Postfix, from userid 28) id 7277F100BC3; Sun, 5 Jun 2011 00:27:47 -0400 (EDT) Delivered-To: hangout-at-nylxs.com Received: from mailbackend.panix.com (mailbackend.panix.com [166.84.1.89]) by www2.mrbrklyn.com (Postfix) with ESMTP id 08212100B83 for ; Sun, 5 Jun 2011 00:27:25 -0400 (EDT) Received: from panix2.panix.com (panix2.panix.com [166.84.1.2]) by mailbackend.panix.com (Postfix) with ESMTP id 4403A32F0F for ; Sun, 5 Jun 2011 00:27:38 -0400 (EDT) Received: by panix2.panix.com (Postfix, from userid 20529) id 1FA0333C6F; Sun, 5 Jun 2011 00:27:38 -0400 (EDT) From: Ruben Safir To: hangout-at-nylxs.com Subject: [NYLXS - HANGOUT] (fwd) Re: Anonymous namespace User-Agent: tin/1.8.3-20070201 ("Scotasay") (UNIX) (NetBSD/5.1 (i386)) Message-Id: <20110605042738.1FA0333C6F-at-panix2.panix.com> Date: Sun, 5 Jun 2011 00:27:38 -0400 (EDT) Sender: owner-hangout-at-mrbrklyn.com Precedence: bulk Reply-To: hangout-at-mrbrklyn.com
-- forwarded message -- Path: reader1.panix.com!panix!panix.com!mrbrklyn From: Ruben Safir Newsgroups: comp.lang.c++ Subject: Re: Anonymous namespace Date: Sat, 4 Jun 2011 02:44:29 +0000 (UTC) Organization: PANIX Public Access Internet and UNIX, NYC Lines: 28 Message-ID: References: <03464db0-e118-463c-9834-171dab457e42-at-h9g2000yqk.googlegroups.com> NNTP-Posting-Host: panix2.panix.com X-Trace: reader1.panix.com 1307155469 11543 166.84.1.2 (4 Jun 2011 02:44:29 GMT) X-Complaints-To: abuse-at-panix.com NNTP-Posting-Date: Sat, 4 Jun 2011 02:44:29 +0000 (UTC) User-Agent: tin/1.8.3-20070201 ("Scotasay") (UNIX) (NetBSD/5.1 (i386)) Xref: panix comp.lang.c++:1085997
Victor Bazarov wrote: > On 6/3/2011 4:08 AM, gwowen wrote: >> On Jun 3, 3:54 am, r...-at-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 -- end of forwarded message --
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