[Bug c++/111660] Compilation of constexpr function returning enum takes exponential time with -std=c++2a

[envia at envia dot pe.kr via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111660

--- Comment #4 from Hwang Joonhyung <envia at envia dot pe.kr> ---
I can see the time spent changes exponentially when I change the number of
ternary operators in the constexpr function.