namespace std {
template<class T> class numeric_limits {
public:
static constexpr bool is_specialized = false;
static constexpr T min() noexcept { return T(); }
static constexpr T max() noexcept { return T(); }
static constexpr T lowest() noexcept { return T(); }
static constexpr int digits = 0;
static constexpr int digits10 = 0;
static constexpr int max_digits10 = 0;
static constexpr bool is_signed = false;
static constexpr bool is_integer = false;
static constexpr bool is_exact = false;
static constexpr int radix = 0;
static constexpr T epsilon() noexcept { return T(); }
static constexpr T round_error() noexcept { return T(); }
static constexpr int min_exponent = 0;
static constexpr int min_exponent10 = 0;
static constexpr int max_exponent = 0;
static constexpr int max_exponent10 = 0;
static constexpr bool has_infinity = false;
static constexpr bool has_quiet_NaN = false;
static constexpr bool has_signaling_NaN = false;
static constexpr float_denorm_style has_denorm = denorm_absent;
static constexpr bool has_denorm_loss = false;
static constexpr T infinity() noexcept { return T(); }
static constexpr T quiet_NaN() noexcept { return T(); }
static constexpr T signaling_NaN() noexcept { return T(); }
static constexpr T denorm_min() noexcept { return T(); }
static constexpr bool is_iec559 = false;
static constexpr bool is_bounded = false;
static constexpr bool is_modulo = false;
static constexpr bool traps = false;
static constexpr bool tinyness_before = false;
static constexpr float_round_style round_style = round_toward_zero;
};
template<class T> class numeric_limits<const T>;
template<class T> class numeric_limits<volatile T>;
template<class T> class numeric_limits<const volatile T>;
}
The default numeric_limits<T> template shall have all members, but with 0 or false values.