#include <array>
#include <iostream>
#include <iterator>
 
template <typename T, size_t N>
struct Array
{
   std::array<T,N> data;
   //T data[N];
 
   auto begin() const { return std::begin(data); }
   auto end() const { return std::end(data); }
};
 
template <typename T, size_t N>
std::ostream& operator << (std::ostream& output, const Array<T, N>& array)
{
   output << "[";
   for (auto&& element : array)
      output << " " << element;
 
   return output << " ]";
}
 
int main()
{
   Array<Array<int, 2>, 2> m { 0, 1, 2, 3 };
   std::cout << m << std::endl;
}
 
 

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