[C++ PATCH] Fix up decl_in_std_namespace_p handling of --enable-symvers=gnu-versioned-namespace

[Jason Merrill]

On 10/30/19 9:30 AM, Marek Polacek wrote:
> On Wed, Oct 30, 2019 at 10:58:57AM +0100, Jakub Jelinek wrote:
>> On Fri, Oct 25, 2019 at 10:44:18AM -0400, Marek Polacek wrote:
>>> That is... sneaky.  I guess I/we need to test with
>>> --enable-symvers=gnu-versioned-namespace every now and then.
>>
>> Indeed.
>>
>>> Probably deserves a comment.
>>
>> Ok, here it is with a comment, bootstrapped/regtested again last night:
> 
> Thanks, looks good!

OK, thanks.  I'm a bit surprised we don't already have something like 
decl_non_inline_namespace_context, but don't need to add it now.

Jason