Function isfinite

extlibs/fmt/include/fmt/chrono.h:673–675

template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
inline bool isfinite(T) {
  return true;
}
template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value)>
inline bool isfinite(T value) {
  return std::isfinite(value);