Function Abs

libs/base/math.hpp:30–34

template <typename T>
T Abs(T x)
{
  static_assert(std::is_signed<T>::value, "");
  return (x < 0 ? -x : x);
}

template <typename Number, typename EnableIf = typename std::enable_if_t<
                               std::is_integral_v<Number> || std::is_floating_point_v<Number>, void>>