Visual Studio IDE環境

>>23
こうしたら出た。
#include <fstream>
#include <memory>

template <typename CH, typename TR = std::char_traits<CH> >
class basic_MyStream : public std::basic_ifstream<CH, TR>
{
public:
  void f();
};

typedef basic_MyStream<char> MyStream;
typedef basic_MyStream<wchar_t> wMyStream;

MyStream s;