On Sat, 2 May 2026, 12:19 Muneem via Std-Proposals, <std-proposals@lists.isocpp.org> wrote:
Hi there, folks! 
I had this issue while working on a stateful metaprogramming technique 
(almost complete):
"is_scoped_enum_v is not a member of std"
https://godbolt.org/z/jqzdf4rvq
as you can see, I am using c++23

No you aren't. 

Your GCC trunk window is using c++20 and that's why you get that error. 

This mailing list is not for help using GCC.


and according to:
https://en.cppreference.com/cpp/types/is_scoped_enum
it says:
template< class T >
struct is_scoped_enum;
(since C++23)
yet I am getting "a not found error". Any discussion on the potential issues would be appreciated and even more so if such discussion targets other issues in my technique/approach. I personally believe that this error is caused by some implementation issues, but what made me discuss this over here is that I face this issue in MSCV and in godbolt. 
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