who wants types?

pwned_recursive_map.cpp

#include <iostream>
#include <map>
#include <string>
#include <boost/variant.hpp> 

typedef boost::variant<std::string, double, int> Data;
  
struct Graph: std::map<Data, Graph>
{ 
  Data data;
    
  template <typename T>
  Graph &operator= (T const &t)
  {
    data= t;
    return *this; 
  }

  template <typename T>
  operator T &(){ return boost::get<T>(data); }

  std::string to_yaml() const
  { 
    return "";
  }
};
  
int main()
{ 
  Graph omg;
  omg["lol"][0]["name"]= "pwned";
  omg["lol"][0]["age"]= 42;
  omg["lol"][1]["name"]= "noob";
  omg["lol"][1]["age"]= 21;
  std::cout<< omg.to_yaml()<< '\n';
}