cpp11's list of matrices

[pachamaltese]

Hi!

I am trying to create a list of two matrices, one for the real part and one for the imaginary part of an Armadillo matrix

I have this code that works

template <typename T>
inline doubles_matrix<> Mat_to_complex_matrix_(const Mat<T>& A) {
  static_assert(is_same<T, complex<double>>::value,
                "T must be complex<double>");
  Mat<double> A_real = real(A);
  Mat<double> A_imag = imag(A);

  int n = A_real.n_rows;
  int m = A_real.n_cols;

  writable::doubles_matrix<> B_real(n, m);
  writable::doubles_matrix<> B_imag(n, m);

  for (int i = 0; i < n; ++i) {
    for (int j = 0; j < m; j++) {
      B_real(i, j) = A_real(i, j);
      B_imag(i, j) = A_imag(i, j);
    }
  }

  return B_real;
}

inline doubles_matrix<> as_complex_matrix(const Mat<complex<double>>& A) {
  return Mat_to_complex_matrix_<complex<double>>(A);
}

If I change the output to return writable::list({"real"_nm = B_real, "imag"_nm = B_imag}) as in this example, it returns this.

[[1]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]]
[[1]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]]
NULL

[[1]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]]
[[1]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]]
NULL

[[1]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]]
[[1]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]]
NULL

[[1]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]]
[[1]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]]
NULL

[[1]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]]
[[1]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]][[2]]
NULL

with a vector (i.e., writable::doubles and vector<double> it is the same issue