libstdc++
I/O

Classes

class  std::basic_filebuf< _CharT, _Traits >
 
class  std::basic_fstream< _CharT, _Traits >
 
class  std::basic_ifstream< _CharT, _Traits >
 
class  std::basic_ios< _CharT, _Traits >
 
class  std::basic_iostream< _CharT, _Traits >
 
class  std::basic_istream< _CharT, _Traits >
 
class  std::basic_istringstream< _CharT, _Traits, _Alloc >
 
class  std::basic_ofstream< _CharT, _Traits >
 
class  std::basic_ostream< _CharT, _Traits >
 
class  std::basic_ostringstream< _CharT, _Traits, _Alloc >
 
class  std::basic_streambuf< _CharT, _Traits >
 
class  std::basic_stringbuf< _CharT, _Traits, _Alloc >
 
class  std::basic_stringstream< _CharT, _Traits, _Alloc >
 
class  std::istreambuf_iterator< _CharT, _Traits >
 
class  std::ostreambuf_iterator< _CharT, _Traits >
 

Typedefs

typedef basic_filebuf< char > std::filebuf
 
typedef basic_fstream< char > std::fstream
 
typedef basic_ifstream< char > std::ifstream
 
typedef basic_ios< char > std::ios
 
typedef basic_iostream< char > std::iostream
 
typedef basic_istream< char > std::istream
 
typedef basic_istringstream< char > std::istringstream
 
typedef basic_ofstream< char > std::ofstream
 
typedef basic_ostream< char > std::ostream
 
typedef basic_ostringstream< char > std::ostringstream
 
typedef basic_streambuf< char > std::streambuf
 
typedef basic_stringbuf< char > std::stringbuf
 
typedef basic_stringstream< char > std::stringstream
 
typedef basic_filebuf< wchar_t > std::wfilebuf
 
typedef basic_fstream< wchar_t > std::wfstream
 
typedef basic_ifstream< wchar_t > std::wifstream
 
typedef basic_ios< wchar_t > std::wios
 
typedef basic_iostream< wchar_t > std::wiostream
 
typedef basic_istream< wchar_t > std::wistream
 
typedef basic_istringstream< wchar_t > std::wistringstream
 
typedef basic_ofstream< wchar_t > std::wofstream
 
typedef basic_ostream< wchar_t > std::wostream
 
typedef basic_ostringstream< wchar_t > std::wostringstream
 
typedef basic_streambuf< wchar_t > std::wstreambuf
 
typedef basic_stringbuf< wchar_t > std::wstringbuf
 
typedef basic_stringstream< wchar_t > std::wstringstream
 

Detailed Description

Nearly all of the I/O classes are parameterized on the type of characters they read and write. (The major exception is ios_base at the top of the hierarchy.) This is a change from pre-Standard streams, which were not templates.

For ease of use and compatibility, all of the basic_* I/O-related classes are given typedef names for both of the builtin character widths (wide and narrow). The typedefs are the same as the pre-Standard names, for example:

typedef basic_ifstream<char> ifstream;
basic_ifstream< char > ifstream
Class for char input file streams.
Definition: iosfwd:162

Because properly forward-declaring these classes can be difficult, you should not do it yourself. Instead, include the <iosfwd> header, which contains only declarations of all the I/O classes as well as the typedefs. Trying to forward-declare the typedefs themselves (e.g., class ostream;) is not valid ISO C++.

For more specific declarations, see https://gcc.gnu.org/onlinedocs/libstdc++/manual/io.html#std.io.objects

Typedef Documentation

◆ filebuf

typedef basic_filebuf<char> std::filebuf

Class for char file buffers.

Definition at line 159 of file iosfwd.

◆ fstream

typedef basic_fstream<char> std::fstream

Class for char mixed input and output file streams.

Definition at line 168 of file iosfwd.

◆ ifstream

Class for char input file streams.

Definition at line 162 of file iosfwd.

◆ ios

typedef basic_ios<char> std::ios

Base class for char streams.

Definition at line 132 of file iosfwd.

◆ iostream

Base class for char mixed input and output streams.

Definition at line 144 of file iosfwd.

◆ istream

typedef basic_istream<char> std::istream

Base class for char input streams.

Definition at line 138 of file iosfwd.

◆ istringstream

Class for char input memory streams.

Definition at line 150 of file iosfwd.

◆ ofstream

Class for char output file streams.

Definition at line 165 of file iosfwd.

◆ ostream

typedef basic_ostream<char> std::ostream

Base class for char output streams.

Definition at line 141 of file iosfwd.

◆ ostringstream

Class for char output memory streams.

Definition at line 153 of file iosfwd.

◆ streambuf

Base class for char buffers.

Definition at line 135 of file iosfwd.

◆ stringbuf

Class for char memory buffers.

Definition at line 147 of file iosfwd.

◆ stringstream

Class for char mixed input and output memory streams.

Definition at line 156 of file iosfwd.

◆ wfilebuf

typedef basic_filebuf<wchar_t> std::wfilebuf

Class for wchar_t file buffers.

Definition at line 199 of file iosfwd.

◆ wfstream

typedef basic_fstream<wchar_t> std::wfstream

Class for wchar_t mixed input and output file streams.

Definition at line 208 of file iosfwd.

◆ wifstream

typedef basic_ifstream<wchar_t> std::wifstream

Class for wchar_t input file streams.

Definition at line 202 of file iosfwd.

◆ wios

typedef basic_ios<wchar_t> std::wios

Base class for wchar_t streams.

Definition at line 172 of file iosfwd.

◆ wiostream

typedef basic_iostream<wchar_t> std::wiostream

Base class for wchar_t mixed input and output streams.

Definition at line 184 of file iosfwd.

◆ wistream

typedef basic_istream<wchar_t> std::wistream

Base class for wchar_t input streams.

Definition at line 178 of file iosfwd.

◆ wistringstream

Class for wchar_t input memory streams.

Definition at line 190 of file iosfwd.

◆ wofstream

typedef basic_ofstream<wchar_t> std::wofstream

Class for wchar_t output file streams.

Definition at line 205 of file iosfwd.

◆ wostream

typedef basic_ostream<wchar_t> std::wostream

Base class for wchar_t output streams.

Definition at line 181 of file iosfwd.

◆ wostringstream

Class for wchar_t output memory streams.

Definition at line 193 of file iosfwd.

◆ wstreambuf

typedef basic_streambuf<wchar_t> std::wstreambuf

Base class for wchar_t buffers.

Definition at line 175 of file iosfwd.

◆ wstringbuf

typedef basic_stringbuf<wchar_t> std::wstringbuf

Class for wchar_t memory buffers.

Definition at line 187 of file iosfwd.

◆ wstringstream

Class for wchar_t mixed input and output memory streams.

Definition at line 196 of file iosfwd.