Simple variant class using standard container for storage and small buffer optimization

var_1a

class var
{
private:
  std::size_t index;
  static std::vector<int64_t>     vsigned;
  static std::vector<double>      vdouble;
  static std::vector<std::string> vstring;
public:
  var() { }
  var(bool v) : index(v) { }
  var(std::size_t v) : index(v) { }
  var(double v) : index(vdouble.size()) { vdouble.push_back(v); }
  var(const char *v) : index(vstring.size()) { vstring.push_back(v); }
  var(const std::string &v) : index(vstring.size()) { vstring.push_back(v); }
  
  virtual ~var() { }
};