[Bug c++/72868] Constexpr expressions mistreat case ranges

[daniel.kruegler at googlemail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=72868

--- Comment #3 from Daniel Krügler <daniel.kruegler at googlemail dot com> ---
The quoted essentials also require you to provide the full command line (A
range in a switch case is not Standard C++), please read about what's needed in
the quoted document.