[Bug c++/83000] Constraints for union-templates do not work

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83000

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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             Status|WAITING                     |UNCONFIRMED
     Ever confirmed|1                           |0

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Martin Liška from comment #3)
> (In reply to Andrew Pinski from comment #2)
> > Seems fixed in GCC 10.
> 
> Are you sure, all releases I have reject the code.

You need -std=c++2a or -std=c++20 or -fconcepts to support concepts :).