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<iosfwd>

Declara o encaminhamento de referências a várias classes de modelo usados em todo o iostreams.Todas essas classes de modelo são definidas em outros cabeçalhos padrão.Você incluir explicitamente esse cabeçalho somente quando você precisar de uma das suas declarações, mas não sua definição.

#include <iosfwd>

Definições de tipo

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;
};

Classes de encaminhar declarações/modelo.

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;

Consulte também

Referência

Segurança do thread na biblioteca C++ padrão

iostream de programação

Convenções de iostreams

Outros recursos

Arquivos de cabeçalho