#ifndef _GHLIBCPP_IOSFWD
#define _GHLIBCPP_IOSFWD
namespace std {
template <class charT> class char_traits;
template <> class char_traits<char>;
template <> class char_traits<char16_t>;
template <> class char_traits<char32_t>;
template <> class char_traits<wchar_t>;
template <class T> class allocator;
template <class charT, class traits = char_traits<charT>> class basic_ios;
template <class charT, class traits = char_traits<charT>> class basic_streambuf;
template <class charT, class traits = char_traits<charT>> class basic_istream;
template <class charT, class traits = char_traits<charT>> class basic_ostream;
template <class charT, class traits = char_traits<charT>> class basic_iostream;
template <class charT, class traits = char_traits<charT>,
          class Allocator = allocator<charT>>
class basic_stringbuf;
template <class charT, class traits = char_traits<charT>,
          class Allocator = allocator<charT>>
class basic_istringstream;
template <class charT, class traits = char_traits<charT>,
          class Allocator = allocator<charT>>
class basic_ostringstream;
template <class charT, class traits = char_traits<charT>,
          class Allocator = allocator<charT>>
class basic_stringstream;
template <class charT, class traits = char_traits<charT>> class basic_filebuf;
template <class charT, class traits = char_traits<charT>> class basic_ifstream;
template <class charT, class traits = char_traits<charT>> class basic_ofstream;
template <class charT, class traits = char_traits<charT>> class basic_fstream;
template <class charT, class traits = char_traits<charT>>
class istreambuf_iterator;
template <class charT, class traits = char_traits<charT>>
class ostreambuf_iterator;
typedef basic_ios<char> ios;
typedef basic_ios<wchar_t> wios;
typedef basic_streambuf<char> streambuf;
typedef basic_istream<char> istream;
typedef basic_ostream<char> ostream;
typedef basic_iostream<char> iostream;
typedef basic_stringbuf<char> stringbuf;
typedef basic_istringstream<char> istringstream;
typedef basic_ostringstream<char> ostringstream;
typedef basic_stringstream<char> stringstream;
typedef basic_filebuf<char> filebuf;
typedef basic_ifstream<char> ifstream;
typedef basic_ofstream<char> ofstream;
typedef basic_fstream<char> fstream;
typedef basic_streambuf<wchar_t> wstreambuf;
typedef basic_istream<wchar_t> wistream;
typedef basic_ostream<wchar_t> wostream;
typedef basic_iostream<wchar_t> wiostream;
typedef basic_stringbuf<wchar_t> wstringbuf;
typedef basic_istringstream<wchar_t> wistringstream;
typedef basic_ostringstream<wchar_t> wostringstream;
typedef basic_stringstream<wchar_t> wstringstream;
typedef basic_filebuf<wchar_t> wfilebuf;
typedef basic_ifstream<wchar_t> wifstream;
typedef basic_ofstream<wchar_t> wofstream;
typedef basic_fstream<wchar_t> wfstream;
} // namespace std
#endif // _GHLIBCPP_IOSFWD