Function Sign

libs/base/math.hpp:38–41

template <typename Number, typename EnableIf = typename std::enable_if_t<
                               std::is_integral_v<Number> || std::is_floating_point_v<Number>, void>>
int constexpr Sign(Number const number) noexcept
{
  return number == 0 ? 0 : number > 0 ? 1 : -1;
}
}  // namespace math

// Compare floats or doubles for almost equality.