text_config.hpp

#include <istream>
#include <map>
#include <string>
#include <sstream>

class text_config
  : public std::map<std::string, std::map<std::string, std::string> >
{
public:
  friend std::istream& operator>>(std::istream&, text_config&);
  friend std::ostream& operator<<(std::ostream&, text_config&);
  
  template <typename Ty>
  void get(std::string section, std::string key, Ty& out)
  {
    std::stringstream ss((*this)[section][key]);
    ss >> out;
  }

  template <typename Ty>
  void set(std::string section, std::string key, Ty val)
  {
    std::stringstream ss;
    ss << val;

    (*this)[section][key] = ss.str();
  }
};