Cell
{
   string TypeName;
   ???  AnyType;
}

Cell row[3];
row[0] = Cell(123);
row[1] = Cell(123.123f);
row[2] = Cell("text");

template <typename T>
struct Cell {
 std::string type;
 T data;
};

/* Или */

std::variant<int, huint, pizda, ruly> aaaaa;

access: std::get<T>(variant);

Cell<T> arr[n];

std::variant<AnyTypes...> arr[n];

std::variant afaik since C++17

struct SimpleVariant {
 union data {
  uint8_t uint8;
  // TODO: see you next time!
 };

 uint8_t type;
};

struct SimpleVariant {
union data {
int int_v;
std::string str_v;
double double_v;
};

uint8_t type;
};

#define INT_TYPE 0u
#define STRING_TYPE 1u
#define DOUBLE_TYPE 2u

SimpleVariant variant {};

variant.data.double_v = 10.0;

variant.type = DOUBLE_TYPE;