Method isfinite

include/fmt/format.h:2508–2512

template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value&& has_isfinite<T>::value)>
FMT_CONSTEXPR20 bool isfinite(T value) {
    constexpr T inf = T(std::numeric_limits<double>::infinity());
    if (is_constant_evaluated()) return !detail::isnan(value) && value < inf && value > -inf;
    return std::isfinite(value);
}

template <typename T, FMT_ENABLE_IF(!has_isfinite<T>::value)> FMT_CONSTEXPR bool isfinite(T value) {
    T inf = T(std::numeric_limits<double>::infinity());