gistfile1.cpp

    switch (typeid(A1))
    {
    case typeid(char):
    case typeid(short int):
    case typeid(int):
      A1 a1 = static_cast<A1>(va_arg(vl, int));
      break;
    case typeid(float):
    case typeid(double):
      A1 a1 = static_cast<A1>(va_arg(vl, double));
      break;
    }