MESSAGE
| DATE | 2011-06-05 |
| FROM | Ruben Safir
|
| SUBJECT | Subject: [NYLXS - HANGOUT] (fwd) Re: Anonymous namespace
|
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Path: reader1.panix.com!panix!not-for-mail
From: Ruben Safir
Newsgroups: comp.lang.c++
Subject: Re: Anonymous namespace
Date: Sat, 4 Jun 2011 05:08:06 +0000 (UTC)
Organization: PANIX Public Access Internet and UNIX, NYC
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On Fri, 03 Jun 2011 20:17:24 +1200, Ian Collins wrote:
> On 06/ 3/11 08:08 PM, 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.
>
> I guess the most common (at least in my case) use is to declare
> different classes with a common name in multiple source files. I have
> lots of instances of
>
> namespace {
> struct TestObject { .. };
> }
>
> in my unit test files.
YES - I can understand that. Then you can have one in each transitional
unit. The problem arises when you #include two of them from different
files.
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