<iosfwd>
Deklariert Vorwärtsverweise zu einigen Vorlagenklassen, die während der iostreams verwendet werden.All diese Vorlagenklassen werden in anderen standardmäßigen Remoteheadern definiert.Schließen Sie diesen Header nur eine explizite Deklarationen erfordern, jedoch nicht ihre Definition ein.
#include <iosfwd>
Typedefs
typedef T1 streamoff;
typedef T2 streamsize;
typedef fpos streampos;
// wchar_t TYPE DEFINITIONS
typedef basic_ios<char, char_traits<char> > ios;
typedef basic_streambuf<char, char_traits<char> > streambuf;
typedef basic_istream<char, char_traits<char> > istream;
typedef basic_ostream<char, char_traits<char> > ostream;
typedef basic_iostream<char, char_traits<char> > iostream;
typedef basic_stringbuf<char, char_traits<char> > stringbuf;
typedef basic_istringstream<char, char_traits<char> > istringstream;
typedef basic_ostringstream<char, char_traits<char> > ostringstream;
typedef basic_stringstream<char, char_traits<char> > stringstream;
typedef basic_filebuf<char, char_traits<char> > filebuf;
typedef basic_ifstream<char, char_traits<char> > ifstream;
typedef basic_ofstream<char, char_traits<char> > ofstream;
typedef basic_fstream<char, char_traits<char> > fstream;
// wchar_t TYPE DEFINITIONS
typedef basic_ios<wchar_t, char_traits<wchar_t> > wios;
typedef basic_streambuf<wchar_t, char_traits<wchar_t> > wstreambuf;
typedef basic_istream<wchar_t, char_traits<wchar_t> > wistream;
typedef basic_ostream<wchar_t, char_traits<wchar_t> > wostream;
typedef basic_iostream<wchar_t, char_traits<wchar_t> > wiostream;
typedef basic_stringbuf<wchar_t, char_traits<wchar_t> > wstringbuf;
typedef basic_istringstream<wchar_t, char_traits<wchar_t> > wistringstream;
typedef basic_ostringstream<wchar_t, char_traits<wchar_t> > wostringstream;
typedef basic_stringstream<wchar_t, char_traits<wchar_t> > wstringstream;
typedef basic_filebuf<wchar_t, char_traits<wchar_t> > wfilebuf;
typedef basic_ifstream<wchar_t, char_traits<wchar_t> > wifstream;
typedef basic_ofstream<wchar_t, char_traits<wchar_t> > wofstream;
typedef basic_fstream<wchar_t, char_traits<wchar_t> > wfstream;
};
Vorwärtsdeklarationen/Vorlagenklassen
template<class _Statetype>
class fpos;
template<class Elem>;
class char_traits;
class char_traits<char>;
class char_traits<wchar_t>;
template<class _Ty>
class allocator;
class ios_base;
template<class Elem, class Tr = char_traits<Elem> >
class basic_ios;
template<class Elem, class Tr = char_traits<Elem> >
class istreambuf_iterator;
template<class Elem, class Tr = char_traits<Elem> >
class ostreambuf_iterator;
template<class Elem, class Tr = char_traits<Elem> >
class basic_streambuf;
template<class Elem, class Tr = char_traits<Elem> >
class basic_istream;
template<class Elem, class Tr = char_traits<Elem> >
class basic_ostream;
template<class Elem, class Tr = char_traits<Elem> >
class basic_iostream;
template<class Elem, class Tr = char_traits<Elem> >
class basic_stringbuf;
template<class Elem, class Tr = char_traits<Elem> >
class basic_istringstream;
template<class Elem, class Tr = char_traits<Elem> >
class basic_ostringstream;
template<class Elem, class Tr = char_traits<Elem> >
class basic_stringstream;
template<class Elem, class Tr = char_traits<Elem> >
class basic_filebuf;
template<class Elem, class Tr = char_traits<Elem> >
class basic_ifstream;
template<class Elem, class Tr = char_traits<Elem> >
class basic_ofstream;
template<class Elem, class Tr = char_traits<Elem> >
class basic_fstream;
Siehe auch
Referenz
Threadsicherheit in der C++-Standardbibliothek
Programmierung der iostream-Headerdatei