Function AF_IF_CONSTEXPR

src/backend/common/half.hpp:872–874

        return __half2short_rn(value);
    }
    else AF_IF_CONSTEXPR(std::is_same<T, unsigned short>::value) {
        return __half2ushort_rn(value);
    }
    else AF_IF_CONSTEXPR(std::is_same<T, long long>::value) {
        return __half2ll_rn(value);
    }