#pragma once

#include <cstdlib>

namespace math { namespace matrix {
  template <typename T, std::size_t R, std::size_t C> class matrix;
}}

namespace math { namespace vector {
  template <typename T, std::size_t N> class vector;
}}

namespace math { namespace matrix { namespace concat_strategy {
  struct {
  } horizonal;
  using horizontal_concat_t = decltype(horizonal);
  struct {
  } vertical;
  using vertical_concat_t = decltype(vertical);
  struct {
  } diagonal;
  using diagonal_concat_t = decltype(diagonal);
}}}