Function clamp

src/backend/cuda/math.hpp:431–434

template<typename T, typename Compare>
constexpr const __DH__ T clamp(const T value, const T lo, const T hi,
                               Compare comp) {
    return comp(value, lo) ? lo : comp(hi, value) ? hi : value;
}

template<typename T>
constexpr const __DH__ T clamp(const T value, const T lo, const T hi) {