[Bug libstdc++/114018] std::nexttoward is not implemented for C++23-FP-Types

[jakub at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114018

--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So, do we need to define those and std::unreachable (); in their bodies or
something similar?