Re: ambiguous types: want automatic conversion

std::cout << i; // works
std::cout << s; // doesn't work: "Not an int" exception thrown

  class Value {
    std::string stringValue;
    int intValue;
    bool isString;
    bool isInt;
  public:
    Value(std::string s) : isString(true), isInt(false),
stringValue(s) {}
    Value(int i) : isString(false), isInt(true), intValue(i) {}
    operator std::string (){
      if(!isString){throw std::runtime_error("Not a string");}
      return stringValue;
    }
    operator int (){
      if(!isInt){throw std::runtime_error("Not an int");}
      return intValue;
    }
  };