[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 #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
But what about following:
#include <cmath>
#include <stdfloat>

auto f = static_cast<std::float128_t (*)(std::float128_t, long
double)>(&std::nexttoward);

This doesn't call std::nexttoward(std::float128_t, long double), just checks if
it is defined.