is there a way to pass nested initializer lists in C++11 to construct a 2D matrix?

Question

Imagine you have a simple matrix class

template 
class Matrix {

  T* data;
  size_t row, col;

public:

  Matrix(size_t m, size_t         


        

Answer 1

Why not?

  Matrix(std::initializer_list> lst) :
  Matrix(lst.size(), lst.size() ? lst.begin()->size() : 0)
  {
     int i = 0, j = 0;
     for (const auto& l : lst)
     {
        for (const auto& v : l)
        {
           data[i + j * row] = v;
           ++j;
        }
        j = 0;
        ++i;
     }
  }

And as stardust_ suggests - you should use vectors, not arrays here.