Re: duplicate using declarations

[Nathan Sidwell <nathan at acm dot org>]

I see this is DR 36.
http://wiki.edg.com/pub/Wg21kona2019/CoreWorkingGroup/cwg_active.html#36

I still think we should drop this check, for one thing we don't apply it 
consistently (eg, naming an unscoped enum value).

On 3/14/19 11:47 AM, Nathan Sidwell wrote:
> Jason, Paolo,
>
> This concerns:
> namespace N
> {
>    int i;
> }
>
> void
> f ()
> {
>    using N::i;
>    using N::i;       // { dg-error "declared" }
> }
>
> which is extracted from g++.dg/lookup/using53.C added fixing 
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=20420
>
> The comment mentions C++11 7.3.3/10, which does give this as an error, 
> but confusingly permits the duplicate decl if we were at namespace 
> scope.  That seems wrong to me, and indeed in the current WD, (moved to 
> 9.8/10) the fn example is removed.  Presumably making it as well formed 
> as the namespace example.
>
> Ok with dropping this check entirely? There's a bunch of obsolete using 
> decl code I'd like to kill before adding support to modules.
>
> nathan


--
Nathan Sidwell