[PATCH] Fix PR c++/21802 (two-stage name lookup fails for operators

[David Abdurachmanov]

> On 15 Jan 2016, at 05:10, Patrick Palka <patrick@parcs.ath.cx> wrote:
> 
> On Thu, 14 Jan 2016, Ryan Burn wrote:
> 
>> Also caused https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69091
> 
> Thanks for the heads up, I was not aware I had caused this regression.

While looking at last few failures with GCC 6.0.0 in our software, I found one
compilation error related to PR c++/21802 fix. I am not yet sure if this is a
compiler issue or something else, thus instead just made a comment [1] to PR
c++/21802 with the current details (incl. pre-processed source).

It works fine with GCC 5.3.0, Clang 3.7.0 and ICC (16.0.2 20160204).

david
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[1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=21802#c8