Module: Standard C++ Library Library: Input/output
Header
The header <iosfwd> is part of the Input/output library of the Standard C++ Library. It declares all essential iostream class templates and defines aliases for specializations of these templates on types char and wchar_t.
#include <iosfwd>
namespace std {
// forward declare the traits class
template<class charT> struct char_traits;
// forward declare the positioning class
template<class stateT> class fpos;
// forward declare the state class
class mbstate_t;
// forward declare the allocator class
template<class T> class allocator;
// forward declare the iostreams class templates
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 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 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 ostreambuf_iterator;
template<class charT,class traits=char_traits<charT> >
class istreambuf_iterator;
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_stringstream;
template<class charT,class traits=char_traits<charT> >
class basic_fstream;
// specializations on tiny characters
typedef basic_ios<char> ios;
typedef basic_streambuf<char> streambuf;
typedef basic_istream<char> istream;
typedef basic_ostream<char> ostream;
typedef basic_stringbuf<char> stringbuf;
typedef basic_istringstream<char> istringstream;
typedef basic_ostringstream<char> ostringstream;
typedef basic_filebuf<char> filebuf;
typedef basic_ifstream<char> ifstream;
typedef basic_ofstream<char> ofstream;
typedef basic_iostream<char> iostream;
typedef basic_stringstream<char> stringstream;
typedef basic_fstream<char> fstream;
// specializations on wide characters
typedef basic_ios<wchar_t> wios;
typedef basic_streambuf<wchar_t> wstreambuf;
typedef basic_istream<wchar_t> wistream;
typedef basic_ostream<wchar_t> wostream;
typedef basic_stringbuf<wchar_t> wstringbuf;
typedef basic_istringstream<wchar_t> wistringstream;
typedef basic_ostringstream<wchar_t> wostringstream;
typedef basic_filebuf<wchar_t> wfilebuf;
typedef basic_ifstream<wchar_t> wifstream;
typedef basic_ofstream<wchar_t> wofstream;
typedef basic_iostream<wchar_t> wiostream;
typedef basic_stringstream<wchar_t> wstringstream;
typedef basic_fstream<wchar_t> wfstream;
// positional types used by char_traits
typedef fpos<mbstate_t> streampos;
typedef fpos<mbstate_t> wstreampos;
typedef long streamoff;
typedef long wstreamoff;
}
fpos, char_traits, basic_ios, basic_streambuf, basic_istream, basic_ostream, basic_iostream, basic_stringbuf, basic_istringstream, basic_ostringstream, basic_stringstream, basic_filebuf, basic_ifstream, basic_ofstream, basic_fstream, istreambuf_iterator, ostreambuf_iterator
ISO/IEC 14882:1998 -- International Standard for Information Systems --Programming Language C++, Section 27.2
Copyright (c) 1994-2006 Rogue Wave Software, a Quovadx Division.
Licensed under the Apache License, Version 2.0.
Contact Rogue Wave about documentation or support issues. You can also seek help from other developers through the Apache stdcxx community (see below).