namespace std
{
  enum _Ios_Fmtflags
    {
      a = 1,
    };
  enum _Ios_Openmode
    {
      _S_in = 1L << 3,
    };
  class ios_base
  {
  public:
    typedef _Ios_Fmtflags fmtflags;
    static const _Ios_Openmode in = _S_in;
  };
  void setiosflags(ios_base::fmtflags __mask)  {  }
}