C++ HM

#include <iostream>
#include <map>
#include <vector>

#include <boost/variant.hpp>

typedef boost::variant<
  int,
  bool,
  double,
  std::string,
  char> basic_types;
typedef std::vector<basic_types> array_types;
typedef std::vector<array_types> matrix_types;
typedef boost::variant<basic_types, array_types, matrix_types> all_types;

int main() {
  std::map<all_types, all_types> test;
  test[0] = 23;
  test[1] = "hello";
  test[15] = 34.5;
  test["mamma mia!"] = 42;

  all_types tt = 42;
  std::cout << (tt == test["mamma mia!"]) << std::endl;

  return 0;
}