[Bug c++/90880] compile error instead of SFINAE with non-public member variables

[federico.kircheis at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90880

--- Comment #3 from Federico Kircheis <federico.kircheis at gmail dot com> ---
(In reply to Jonathan Wakely from comment #2)
> (In reply to Federico Kircheis from comment #1)
> > After researching a little bit more, I've convinced myself that
> > `status<c1>::value` should be false, as `decltype` has no special rules for
> > accessing private data, thus clang is correct.
> 
> Agreed. And G++ should accept it.


Thank you.

Sorry if linking to external bug trackers in comments is bad practice, but I
did not saw any rule about it.
Since it could be interesting for those having this issue, here is the bug
report for MSVC: 

https://developercommunity.visualstudio.com/content/problem/607019/incorrect-decltype-on-non-public-member-variables.html