| std::basic_ofstream(3) | Library Functions Manual | std::basic_ofstream(3) | 
NAME¶
std::basic_ofstream -
Controlling output for files.
This class supports reading from named files, using the inherited functions from std::basic_ostream. To control the associated sequence, an instance of std::basic_filebuf is used, which this page refers to as sb.
SYNOPSIS¶
Inherits std::basic_ostream< _CharT, _Traits >.
Public Types¶
typedef ctype< _CharT > __ctype_type
  
  typedef basic_filebuf< char_type, traits_type >
    __filebuf_type
  
  typedef basic_ios< _CharT, _Traits > __ios_type
  
  typedef num_put< _CharT, ostreambuf_iterator< _CharT,
    _Traits > > __num_put_type
  
  typedef basic_ostream< char_type, traits_type >
    __ostream_type
  
  typedef basic_streambuf< _CharT, _Traits >
    __streambuf_type
  
  typedef _CharT char_type
  
  enum event { erase_event, imbue_event,
    copyfmt_event }
  
  typedef void(* event_callback )(event, ios_base &,
    int)
  
  typedef _Ios_Fmtflags fmtflags
  
  typedef traits_type::int_type int_type
  
  typedef int io_state
  
  typedef _Ios_Iostate iostate
  
  typedef traits_type::off_type off_type
  
  typedef int open_mode
  
  typedef _Ios_Openmode openmode
  
  typedef traits_type::pos_type pos_type
  
  typedef int seek_dir
  
  typedef _Ios_Seekdir seekdir
  
  typedef std::streamoff streamoff
  
  typedef std::streampos streampos
  
  typedef _Traits traits_type
  
  
Public Member Functions¶
const locale & _M_getloc () const
  
  void _M_setstate (iostate __state)
  
  bool bad () const
  
  basic_ofstream (const std::string &__s,
    ios_base::openmode
    __mode=ios_base::out|ios_base::trunc)
  
  basic_ofstream (const char *__s, ios_base::openmode
    __mode=ios_base::out|ios_base::trunc)
  
  basic_ofstream ()
  
  void clear (iostate __state=goodbit)
  
  void close ()
  
  basic_ios & copyfmt (const basic_ios &__rhs)
  
  bool eof () const
  
  void exceptions (iostate __except)
  
  iostate exceptions () const
  
  bool fail () const
  
  char_type fill (char_type __ch)
  
  char_type fill () const
  
  fmtflags flags (fmtflags __fmtfl)
  
  fmtflags flags () const
  
  __ostream_type & flush ()
  
  locale getloc () const
  
  bool good () const
  
  locale imbue (const locale &__loc)
  
  bool is_open () const
  
  bool is_open ()
  
  long & iword (int __ix)
  
  char narrow (char_type __c, char __dfault) const
  
  void open (const std::string &__s, ios_base::openmode
    __mode=ios_base::out|ios_base::trunc)
  
  void open (const char *__s, ios_base::openmode
    __mode=ios_base::out|ios_base::trunc)
  
  streamsize precision (streamsize __prec)
  
  streamsize precision () const
  
  void *& pword (int __ix)
  
  basic_streambuf< _CharT, _Traits > * rdbuf
    (basic_streambuf< _CharT, _Traits > *__sb)
  
  __filebuf_type * rdbuf () const
  
  iostate rdstate () const
  
  void register_callback (event_callback __fn, int __index)
  
  __ostream_type & seekp (off_type,
    ios_base::seekdir)
  
  __ostream_type & seekp (pos_type)
  
  fmtflags setf (fmtflags __fmtfl, fmtflags __mask)
  
  fmtflags setf (fmtflags __fmtfl)
  
  void setstate (iostate __state)
  
  pos_type tellp ()
  
  basic_ostream< _CharT, _Traits > * tie
    (basic_ostream< _CharT, _Traits > *__tiestr)
  
  basic_ostream< _CharT, _Traits > * tie () const
  
  void unsetf (fmtflags __mask)
  
  char_type widen (char __c) const
  
  streamsize width (streamsize __wide)
  
  streamsize width () const
  
  ~basic_ofstream ()
  
  
Unformatted Output Functions
  
   All the unformatted output functions have some common behavior. Each starts
    by constructing a temporary object of type
    std::basic_ostream::sentry. This has several effects, concluding with
    the setting of a status flag; see the sentry documentation for more.
If the sentry status is good, the function tries to generate whatever data is appropriate for the type of the argument.
If an exception is thrown during insertion, ios_base::badbit will be turned on in the stream's error state. If badbit is on in the stream's exceptions mask, the exception will be rethrown without completing its actions.
  
  
  void _M_write (const char_type *__s, streamsize __n)
  
  __ostream_type & put (char_type __c)
  
  __ostream_type & write (const char_type *__s,
    streamsize __n)
  
  
  
Arithmetic Inserters
  
   All the operator<< functions (aka formatted output
    functions) have some common behavior. Each starts by constructing a
    temporary object of type std::basic_ostream::sentry. This can
    have several effects, concluding with the setting of a status flag; see the
    sentry documentation for more.
If the sentry status is good, the function tries to generate whatever data is appropriate for the type of the argument.
If an exception is thrown during insertion, ios_base::badbit will be turned on in the stream's error state without causing an ios_base::failure to be thrown. The original exception will then be rethrown.
  
  
  __ostream_type & operator<< (__streambuf_type
    *__sb)
  
  __ostream_type & operator<< (const void *__p)
  
  __ostream_type & operator<< (long double __f)
  
  __ostream_type & operator<< (float __f)
  
  __ostream_type & operator<< (double __f)
  
  __ostream_type & operator<< (unsigned long long __n)
  
  __ostream_type & operator<< (long long __n)
  
  __ostream_type & operator<< (unsigned int __n)
  
  __ostream_type & operator<< (int __n)
  
  __ostream_type & operator<< (unsigned short __n)
  
  __ostream_type & operator<< (short __n)
  
  __ostream_type & operator<< (bool __n)
  
  __ostream_type & operator<< (unsigned long __n)
  
  __ostream_type & operator<< (long __n)
  
  
  
  
  
  __ostream_type & operator<< (ios_base
    &(*__pf)(ios_base &))
  
  __ostream_type & operator<< (__ios_type
    &(*__pf)(__ios_type &))
  
  __ostream_type & operator<< (__ostream_type
    &(*__pf)(__ostream_type &))
  
  
  
Static Public Member Functions¶
static bool sync_with_stdio (bool __sync=true)
  
  static int xalloc () throw ()
  
  
Static Public Attributes¶
static const fmtflags adjustfield
  
  static const openmode app
  
  static const openmode ate
  
  static const iostate badbit
  
  static const fmtflags basefield
  
  static const seekdir beg
  
  static const openmode binary
  
  static const fmtflags boolalpha
  
  static const seekdir cur
  
  static const fmtflags dec
  
  static const seekdir end
  
  static const iostate eofbit
  
  static const iostate failbit
  
  static const fmtflags fixed
  
  static const fmtflags floatfield
  
  static const iostate goodbit
  
  static const fmtflags hex
  
  static const openmode in
  
  static const fmtflags internal
  
  static const fmtflags left
  
  static const fmtflags oct
  
  static const openmode out
  
  static const fmtflags right
  
  static const fmtflags scientific
  
  static const fmtflags showbase
  
  static const fmtflags showpoint
  
  static const fmtflags showpos
  
  static const fmtflags skipws
  
  static const openmode trunc
  
  static const fmtflags unitbuf
  
  static const fmtflags uppercase
  
  
Protected Types¶
enum { _S_local_word_size }
  
  
Protected Member Functions¶
void _M_cache_locale (const locale &__loc)
  
  void _M_call_callbacks (event __ev) throw ()
  
  void _M_dispose_callbacks (void)
  
  _Words & _M_grow_words (int __index, bool __iword)
  
  void _M_init ()
  
  template<typename _ValueT > __ostream_type & _M_insert
    (_ValueT __v)
  
  void init (basic_streambuf< _CharT, _Traits > *__sb)
  
  
Protected Attributes¶
_Callback_list * _M_callbacks
  
  const __ctype_type * _M_ctype
  
  char_type _M_fill
  
  bool _M_fill_init
  
  locale _M_ios_locale
  
  _Words _M_local_word [_S_local_word_size]
  
  const __num_get_type * _M_num_get
  
  const __num_put_type * _M_num_put
  
  basic_streambuf< _CharT, _Traits > * _M_streambuf
  
  basic_ostream< _CharT, _Traits > * _M_tie
  
  _Words * _M_word
  
  int _M_word_size
  
  _Words _M_word_zero
  
  
  
  
  iostate _M_exception
  
  fmtflags _M_flags
  
  streamsize _M_precision
  
  iostate _M_streambuf_state
  
  streamsize _M_width
  
  
  
Friends¶
class sentry
  
  
  
  typedef num_get< _CharT, istreambuf_iterator< _CharT,
    _Traits > > __num_get_type
  
  operator void * () const
  
  bool operator! () const
  
  
Detailed Description¶
template<typename _CharT, typename _Traits> class std::basic_ofstream< _CharT, _Traits >¶
Controlling output for files.
This class supports reading from named files, using the inherited functions from std::basic_ostream. To control the associated sequence, an instance of std::basic_filebuf is used, which this page refers to as sb.
Definition at line 582 of file fstream.
Member Typedef Documentation¶
template<typename _CharT, typename _Traits> typedef ctype<_CharT> std::basic_ostream< _CharT, _Traits >::__ctype_type [inherited] These are non-standard types.¶
Reimplemented from std::basic_ios< _CharT, _Traits >.
Definition at line 71 of file ostream.
template<typename _CharT, typename _Traits> typedef num_get<_CharT, istreambuf_iterator<_CharT, _Traits> > std::basic_ios< _CharT, _Traits >::__num_get_type [inherited] These are non-standard types.¶
Reimplemented in std::basic_istream< _CharT, _Traits >, std::basic_istream< char, _Traits >, and std::basic_istream< char >.
Definition at line 86 of file basic_ios.h.
template<typename _CharT, typename _Traits> typedef num_put<_CharT, ostreambuf_iterator<_CharT, _Traits> > std::basic_ostream< _CharT, _Traits >::__num_put_type [inherited]¶
The quick-and-easy status check. This allows you to write constructs such as 'if (!a_stream) ...' and 'while (a_stream) ...'
Reimplemented from std::basic_ios< _CharT, _Traits >.
Definition at line 70 of file ostream.
template<typename _CharT , typename _Traits > typedef _CharT std::basic_ofstream< _CharT, _Traits >::char_type These are standard types. They permit a standardized way of referring to names of (or names dependant on) the template parameters, which are specific to the implementation.¶
Reimplemented from std::basic_ostream< _CharT, _Traits >.
Definition at line 586 of file fstream.
typedef void(* std::ios_base::event_callback)(event, ios_base &, int) [inherited]¶
The type of an event callback function. Parameters:
ios_base Reference to the ios_base object.
int The integer provided when the callback was registered.
Event callbacks are user defined functions that get called during several ios_base and basic_ios functions, specifically imbue(), copyfmt(), and ~ios().
Definition at line 444 of file ios_base.h.
typedef _Ios_Fmtflags std::ios_base::fmtflags [inherited]¶
This is a bitmask type. '_Ios_Fmtflags' is implementation-defined, but it is valid to perform bitwise operations on these values and expect the Right Thing to happen. Defined objects of type fmtflags are:
- boolalpha
- dec
- fixed
- hex
- internal
- left
- oct
- right
- scientific
- showbase
- showpoint
- showpos
- skipws
- unitbuf
- uppercase
- adjustfield
- basefield
- floatfield
Definition at line 263 of file ios_base.h.
template<typename _CharT , typename _Traits > typedef traits_type::int_type std::basic_ofstream< _CharT, _Traits >::int_type These are non-standard types.¶
Reimplemented from std::basic_ostream< _CharT, _Traits >.
Definition at line 588 of file fstream.
typedef _Ios_Iostate std::ios_base::iostate [inherited]¶
This is a bitmask type. '_Ios_Iostate' is implementation-defined, but it is valid to perform bitwise operations on these values and expect the Right Thing to happen. Defined objects of type iostate are:
- badbit
- eofbit
- failbit
- goodbit
Definition at line 338 of file ios_base.h.
template<typename _CharT , typename _Traits > typedef traits_type::off_type std::basic_ofstream< _CharT, _Traits >::off_type These are non-standard types.¶
Reimplemented from std::basic_ostream< _CharT, _Traits >.
Definition at line 590 of file fstream.
typedef _Ios_Openmode std::ios_base::openmode [inherited]¶
This is a bitmask type. '_Ios_Openmode' is implementation-defined, but it is valid to perform bitwise operations on these values and expect the Right Thing to happen. Defined objects of type openmode are:
- app
- ate
- binary
- in
- out
- trunc
Definition at line 369 of file ios_base.h.
template<typename _CharT , typename _Traits > typedef traits_type::pos_type std::basic_ofstream< _CharT, _Traits >::pos_type These are non-standard types.¶
Reimplemented from std::basic_ostream< _CharT, _Traits >.
Definition at line 589 of file fstream.
typedef _Ios_Seekdir std::ios_base::seekdir [inherited]¶
This is an enumerated type. '_Ios_Seekdir' is implementation-defined. Defined values of type seekdir are:
- beg
- cur, equivalent to SEEK_CUR in the C standard library.
- end, equivalent to SEEK_END in the C standard library.
Definition at line 401 of file ios_base.h.
template<typename _CharT , typename _Traits > typedef _Traits std::basic_ofstream< _CharT, _Traits >::traits_type These are non-standard types.¶
Reimplemented from std::basic_ostream< _CharT, _Traits >.
Definition at line 587 of file fstream.
Member Enumeration Documentation¶
enum std::ios_base::event [inherited]¶
The set of events that may be passed to an event callback. erase_event is used during ~ios() and copyfmt(). imbue_event is used during imbue(). copyfmt_event is used during copyfmt().
Definition at line 427 of file ios_base.h.
Constructor & Destructor Documentation¶
template<typename _CharT , typename _Traits > std::basic_ofstream< _CharT, _Traits >::basic_ofstream () [inline]¶
Default constructor. Initializes sb using its default constructor, and passes &sb to the base class initializer. Does not open any files (you haven't given it a filename to open).
Definition at line 608 of file fstream.
template<typename _CharT , typename _Traits > std::basic_ofstream< _CharT, _Traits >::basic_ofstream (const char * __s, ios_base::openmode __mode = ios_base::out|ios_base::trunc) [inline, explicit]¶
Create an output file stream. Parameters:
mode Open file in specified mode (see std::ios_base).
ios_base::out|ios_basetrunc is automatically included in mode.
Tip: When using std::string to hold the filename, you must use .c_str() before passing it to this constructor.
Definition at line 623 of file fstream.
template<typename _CharT , typename _Traits > std::basic_ofstream< _CharT, _Traits >::basic_ofstream (const std::string & __s, ios_base::openmode __mode = ios_base::out|ios_base::trunc) [inline, explicit]¶
Create an output file stream. Parameters:
mode Open file in specified mode (see std::ios_base).
ios_base::out|ios_basetrunc is automatically included in mode.
Definition at line 641 of file fstream.
template<typename _CharT , typename _Traits > std::basic_ofstream< _CharT, _Traits >::~basic_ofstream () [inline]¶
The destructor does nothing. The file is closed by the filebuf object, not the formatting stream.
Definition at line 656 of file fstream.
Member Function Documentation¶
const locale& std::ios_base::_M_getloc () const [inline, inherited]¶
Locale access. Returns:
Like getloc above, but returns a reference instead of generating a copy.
Definition at line 710 of file ios_base.h.
Referenced by std::money_get< _CharT, _InIter >::do_get(), std::num_get< _CharT, _InIter >::do_get(), std::time_get< _CharT, _InIter >::do_get_date(), std::time_get< _CharT, _InIter >::do_get_monthname(), std::time_get< _CharT, _InIter >::do_get_time(), std::time_get< _CharT, _InIter >::do_get_weekday(), std::time_get< _CharT, _InIter >::do_get_year(), std::time_put< _CharT, _OutIter >::do_put(), std::num_put< _CharT, _OutIter >::do_put(), and std::time_put< _CharT, _OutIter >::put().
template<typename _CharT, typename _Traits> void std::basic_ostream< _CharT, _Traits >::_M_write (const char_type * __s, streamsize __n) [inline, inherited]¶
Simple insertion. Parameters:
Returns:
Tries to insert c.
Note:
Definition at line 287 of file ostream.
Referenced by std::basic_ostream< _CharT, _Traits >::write().
template<typename _CharT, typename _Traits> bool std::basic_ios< _CharT, _Traits >::bad () const [inline, inherited]¶
Fast error checking. Returns:
Note that other iostate flags may also be set.
Definition at line 201 of file basic_ios.h.
template<typename _CharT , typename _Traits > void std::basic_ios< _CharT, _Traits >::clear (iostate __state = goodbit) [inline, inherited]¶
[Re]sets the error state. Parameters:
See std::ios_base::iostate for the possible bit values. Most users will not need to pass an argument.
Definition at line 40 of file basic_ios.tcc.
Referenced by std::basic_ios< _CharT, _Traits >::rdbuf().
template<typename _CharT , typename _Traits > void std::basic_ofstream< _CharT, _Traits >::close () [inline]¶
Close the file. Calls std::basic_filebuf::close(). If that function fails, failbit is set in the stream's error state.
Definition at line 736 of file fstream.
template<typename _CharT , typename _Traits > basic_ios< _CharT, _Traits > & std::basic_ios< _CharT, _Traits >::copyfmt (const basic_ios< _CharT, _Traits > & __rhs) [inline, inherited]¶
Copies fields of __rhs into this. Parameters:
Returns:
All fields of __rhs are copied into this object except that rdbuf() and rdstate() remain unchanged. All values in the pword and iword arrays are copied. Before copying, each callback is invoked with erase_event. After copying, each (new) callback is invoked with copyfmt_event. The final step is to copy exceptions().
Definition at line 62 of file basic_ios.tcc.
References std::basic_ios< _CharT, _Traits >::exceptions(), std::basic_ios< _CharT, _Traits >::fill(), std::ios_base::flags(), std::ios_base::getloc(), std::ios_base::precision(), std::basic_ios< _CharT, _Traits >::tie(), and std::ios_base::width().
template<typename _CharT, typename _Traits> bool std::basic_ios< _CharT, _Traits >::eof () const [inline, inherited]¶
Fast error checking. Returns:
Note that other iostate flags may also be set.
Definition at line 180 of file basic_ios.h.
Referenced by std::basic_istream< _CharT, _Traits >::get(), std::basic_istream< _CharT, _Traits >::getline(), std::basic_istream< _CharT, _Traits >::ignore(), std::basic_istream< _CharT, _Traits >::peek(), std::basic_istream< _CharT, _Traits >::putback(), and std::basic_istream< _CharT, _Traits >::unget().
template<typename _CharT, typename _Traits> void std::basic_ios< _CharT, _Traits >::exceptions (iostate __except) [inline, inherited]¶
Throwing exceptions on errors. Parameters:
By default, error flags are set silently. You can set an exceptions mask for each stream; if a bit in the mask becomes set in the error flags, then an exception of type std::ios_base::failure is thrown.
If the error flag is already set when the exceptions mask is added, the exception is immediately thrown. Try running the following under GCC 3.1 or later:
#include <iostream>
#include <fstream>
#include <exception>
int main()
{
std::set_terminate (__gnu_cxx::__verbose_terminate_handler);
std::ifstream f ('/etc/motd');
std::cerr << 'Setting badbit0;
f.setstate (std::ios_base::badbit);
std::cerr << 'Setting exception mask0;
f.exceptions (std::ios_base::badbit);
}
Definition at line 247 of file basic_ios.h.
template<typename _CharT, typename _Traits> iostate std::basic_ios< _CharT, _Traits >::exceptions () const [inline, inherited]¶
Throwing exceptions on errors. Returns:
This changes nothing in the stream. See the one-argument version of exceptions(iostate) for the meaning of the return value.
Definition at line 212 of file basic_ios.h.
Referenced by std::basic_ios< _CharT, _Traits >::copyfmt().
template<typename _CharT, typename _Traits> bool std::basic_ios< _CharT, _Traits >::fail () const [inline, inherited]¶
Fast error checking. Returns:
Checking the badbit in fail() is historical practice. Note that other iostate flags may also be set.
Definition at line 191 of file basic_ios.h.
Referenced by std::basic_istream< _CharT, _Traits >::operator>>(), std::basic_istream< _CharT, _Traits >::seekg(), std::basic_ostream< _CharT, _Traits >::seekp(), std::basic_istream< _CharT, _Traits >::tellg(), and std::basic_ostream< _CharT, _Traits >::tellp().
template<typename _CharT, typename _Traits> char_type std::basic_ios< _CharT, _Traits >::fill (char_type __ch) [inline, inherited]¶
Sets a new 'empty' character. Parameters:
Returns:
The fill character is used to fill out space when P+ characters have been requested (e.g., via setw), Q characters are actually used, and Q<P. It defaults to a space (' ') in the current locale.
Definition at line 380 of file basic_ios.h.
template<typename _CharT, typename _Traits> char_type std::basic_ios< _CharT, _Traits >::fill () const [inline, inherited]¶
Retrieves the 'empty' character. Returns:
It defaults to a space (' ') in the current locale.
Definition at line 360 of file basic_ios.h.
Referenced by std::basic_ios< _CharT, _Traits >::copyfmt().
fmtflags std::ios_base::flags (fmtflags __fmtfl) [inline, inherited]¶
Setting new format flags all at once. Parameters:
Returns:
This function overwrites all the format flags with fmtfl.
Definition at line 566 of file ios_base.h.
fmtflags std::ios_base::flags () const [inline, inherited]¶
Access to format flags. Returns:
Definition at line 555 of file ios_base.h.
Referenced by std::basic_ios< _CharT, _Traits >::copyfmt(), std::num_get< _CharT, _InIter >::do_get(), std::num_put< _CharT, _OutIter >::do_put(), std::basic_ostream< _CharT, _Traits >::operator<<(), and std::operator<<().
template<typename _CharT , typename _Traits > basic_ostream< _CharT, _Traits > & std::basic_ostream< _CharT, _Traits >::flush () [inline, inherited]¶
Synchronizing the stream buffer. Returns:
If rdbuf() is a null pointer, changes nothing.
Otherwise, calls rdbuf()->pubsync(), and if that returns -1, sets badbit.
Definition at line 211 of file ostream.tcc.
References std::ios_base::badbit, std::ios_base::goodbit, std::basic_ios< _CharT, _Traits >::rdbuf(), and std::basic_ios< _CharT, _Traits >::setstate().
Referenced by std::flush().
locale std::ios_base::getloc () const [inline, inherited]¶
Locale access. Returns:
If imbue(loc) has previously been called, then this function returns loc. Otherwise, it returns a copy of std::locale(), the global C++ locale.
Definition at line 699 of file ios_base.h.
Referenced by std::basic_ios< _CharT, _Traits >::copyfmt(), std::money_put< _CharT, _OutIter >::do_put(), std::basic_ios< _CharT, _Traits >::imbue(), std::operator>>(), and std::ws().
template<typename _CharT, typename _Traits> bool std::basic_ios< _CharT, _Traits >::good () const [inline, inherited]¶
Fast error checking. Returns:
A wrapper around rdstate.
Definition at line 170 of file basic_ios.h.
template<typename _CharT , typename _Traits > locale std::basic_ios< _CharT, _Traits >::imbue (const locale & __loc) [inline, inherited]¶
Moves to a new locale. Parameters:
Returns:
Calls ios_base::imbue(loc), and if a stream buffer is associated with this stream, calls that buffer's pubimbue(loc).
Additional l10n notes are at http://gcc.gnu.org/onlinedocs/libstdc++/manual/localization.html
Reimplemented from std::ios_base.
Definition at line 113 of file basic_ios.tcc.
References std::ios_base::getloc(), and std::basic_ios< _CharT, _Traits >::rdbuf().
Referenced by std::operator<<().
template<typename _CharT, typename _Traits> void std::basic_ios< _CharT, _Traits >::init (basic_streambuf< _CharT, _Traits > * __sb) [inline, protected, inherited]¶
All setup is performed here. This is called from the public constructor. It is not virtual and cannot be redefined.
Definition at line 125 of file basic_ios.tcc.
References std::ios_base::_M_exception, std::ios_base::_M_streambuf_state, std::ios_base::badbit, and std::ios_base::goodbit.
template<typename _CharT , typename _Traits > bool std::basic_ofstream< _CharT, _Traits >::is_open () [inline]¶
Wrapper to test for an open file. Returns:
Definition at line 675 of file fstream.
long& std::ios_base::iword (int __ix) [inline, inherited]¶
Access to integer array. Parameters:
Returns:
The iword function provides access to an array of integers that can be used for any purpose. The array grows as required to hold the supplied index. All integers in the array are initialized to 0.
The implementation reserves several indices. You should use xalloc to obtain an index that is safe to use. Also note that since the array can grow dynamically, it is not safe to hold onto the reference.
Definition at line 745 of file ios_base.h.
template<typename _CharT, typename _Traits> char std::basic_ios< _CharT, _Traits >::narrow (char_type __c, char __dfault) const [inline, inherited]¶
Squeezes characters. Parameters:
dfault The character to narrow.
Returns:
Maps a character of char_type to a character of char, if possible.
Returns the result of
std::use_facet<ctype<char_type> >(getloc()).narrow(c,dfault)
Additional l10n notes are at http://gcc.gnu.org/onlinedocs/libstdc++/manual/localization.html
Definition at line 420 of file basic_ios.h.
template<typename _CharT , typename _Traits > void std::basic_ofstream< _CharT, _Traits >::open (const std::string & __s, ios_base::openmode __mode = ios_base::out | ios_base::trunc) [inline]¶
Opens an external file. Parameters:
mode The open mode flags.
Calls std::basic_filebuf::open(s,mode|out|trunc). If that function fails, failbit is set in the stream's error state.
Definition at line 717 of file fstream.
template<typename _CharT , typename _Traits > void std::basic_ofstream< _CharT, _Traits >::open (const char * __s, ios_base::openmode __mode = ios_base::out | ios_base::trunc) [inline]¶
Opens an external file. Parameters:
mode The open mode flags.
Calls std::basic_filebuf::open(s,mode|out|trunc). If that function fails, failbit is set in the stream's error state.
Tip: When using std::string to hold the filename, you must use .c_str() before passing it to this constructor.
Definition at line 696 of file fstream.
template<typename _CharT, typename _Traits> std::basic_ios< _CharT, _Traits >::operator void * () const [inline, inherited]¶
The quick-and-easy status check. This allows you to write constructs such as 'if (!a_stream) ...' and 'while (a_stream) ...'
Definition at line 111 of file basic_ios.h.
template<typename _CharT, typename _Traits> bool std::basic_ios< _CharT, _Traits >::operator! () const [inline, inherited]¶
The quick-and-easy status check. This allows you to write constructs such as 'if (!a_stream) ...' and 'while (a_stream) ...'
Definition at line 115 of file basic_ios.h.
template<typename _CharT , typename _Traits > basic_ostream< _CharT, _Traits > & std::basic_ostream< _CharT, _Traits >::operator<< (__streambuf_type * __sb) [inline, inherited]¶
Extracting from another streambuf. Parameters:
This function behaves like one of the basic arithmetic extractors, in that it also constructs a sentry object and has the same error handling behavior.
If sb is NULL, the stream will set failbit in its error state.
Characters are extracted from sb and inserted into *this until one of the following occurs:
- the input stream reaches end-of-file,
- insertion into the output sequence fails (in this case, the character that would have been inserted is not extracted), or
- an exception occurs while getting a character from sb, which sets failbit in the error state
If the function inserts no characters, failbit is set.
Definition at line 120 of file ostream.tcc.
References std::ios_base::badbit, std::ios_base::failbit, std::ios_base::goodbit, std::basic_ios< _CharT, _Traits >::rdbuf(), and std::basic_ios< _CharT, _Traits >::setstate().
template<typename _CharT, typename _Traits> __ostream_type& std::basic_ostream< _CharT, _Traits >::operator<< (const void * __p) [inline, inherited]¶
Extracting from another streambuf. Parameters:
This function behaves like one of the basic arithmetic extractors, in that it also constructs a sentry object and has the same error handling behavior.
If sb is NULL, the stream will set failbit in its error state.
Characters are extracted from sb and inserted into *this until one of the following occurs:
- the input stream reaches end-of-file,
- insertion into the output sequence fails (in this case, the character that would have been inserted is not extracted), or
- an exception occurs while getting a character from sb, which sets failbit in the error state
If the function inserts no characters, failbit is set.
Definition at line 225 of file ostream.
template<typename _CharT, typename _Traits> __ostream_type& std::basic_ostream< _CharT, _Traits >::operator<< (long double __f) [inline, inherited]¶
Extracting from another streambuf. Parameters:
This function behaves like one of the basic arithmetic extractors, in that it also constructs a sentry object and has the same error handling behavior.
If sb is NULL, the stream will set failbit in its error state.
Characters are extracted from sb and inserted into *this until one of the following occurs:
- the input stream reaches end-of-file,
- insertion into the output sequence fails (in this case, the character that would have been inserted is not extracted), or
- an exception occurs while getting a character from sb, which sets failbit in the error state
If the function inserts no characters, failbit is set.
Definition at line 221 of file ostream.
template<typename _CharT, typename _Traits> __ostream_type& std::basic_ostream< _CharT, _Traits >::operator<< (float __f) [inline, inherited]¶
Extracting from another streambuf. Parameters:
This function behaves like one of the basic arithmetic extractors, in that it also constructs a sentry object and has the same error handling behavior.
If sb is NULL, the stream will set failbit in its error state.
Characters are extracted from sb and inserted into *this until one of the following occurs:
- the input stream reaches end-of-file,
- insertion into the output sequence fails (in this case, the character that would have been inserted is not extracted), or
- an exception occurs while getting a character from sb, which sets failbit in the error state
If the function inserts no characters, failbit is set.
Definition at line 213 of file ostream.
template<typename _CharT, typename _Traits> __ostream_type& std::basic_ostream< _CharT, _Traits >::operator<< (double __f) [inline, inherited]¶
Extracting from another streambuf. Parameters:
This function behaves like one of the basic arithmetic extractors, in that it also constructs a sentry object and has the same error handling behavior.
If sb is NULL, the stream will set failbit in its error state.
Characters are extracted from sb and inserted into *this until one of the following occurs:
- the input stream reaches end-of-file,
- insertion into the output sequence fails (in this case, the character that would have been inserted is not extracted), or
- an exception occurs while getting a character from sb, which sets failbit in the error state
If the function inserts no characters, failbit is set.
Definition at line 209 of file ostream.
template<typename _CharT, typename _Traits> __ostream_type& std::basic_ostream< _CharT, _Traits >::operator<< (unsigned long long __n) [inline, inherited]¶
Extracting from another streambuf. Parameters:
This function behaves like one of the basic arithmetic extractors, in that it also constructs a sentry object and has the same error handling behavior.
If sb is NULL, the stream will set failbit in its error state.
Characters are extracted from sb and inserted into *this until one of the following occurs:
- the input stream reaches end-of-file,
- insertion into the output sequence fails (in this case, the character that would have been inserted is not extracted), or
- an exception occurs while getting a character from sb, which sets failbit in the error state
If the function inserts no characters, failbit is set.
Definition at line 204 of file ostream.
template<typename _CharT, typename _Traits> __ostream_type& std::basic_ostream< _CharT, _Traits >::operator<< (long long __n) [inline, inherited]¶
Extracting from another streambuf. Parameters:
This function behaves like one of the basic arithmetic extractors, in that it also constructs a sentry object and has the same error handling behavior.
If sb is NULL, the stream will set failbit in its error state.
Characters are extracted from sb and inserted into *this until one of the following occurs:
- the input stream reaches end-of-file,
- insertion into the output sequence fails (in this case, the character that would have been inserted is not extracted), or
- an exception occurs while getting a character from sb, which sets failbit in the error state
If the function inserts no characters, failbit is set.
Definition at line 200 of file ostream.
template<typename _CharT, typename _Traits> __ostream_type& std::basic_ostream< _CharT, _Traits >::operator<< (unsigned int __n) [inline, inherited]¶
Extracting from another streambuf. Parameters:
This function behaves like one of the basic arithmetic extractors, in that it also constructs a sentry object and has the same error handling behavior.
If sb is NULL, the stream will set failbit in its error state.
Characters are extracted from sb and inserted into *this until one of the following occurs:
- the input stream reaches end-of-file,
- insertion into the output sequence fails (in this case, the character that would have been inserted is not extracted), or
- an exception occurs while getting a character from sb, which sets failbit in the error state
If the function inserts no characters, failbit is set.
Definition at line 191 of file ostream.
template<typename _CharT , typename _Traits > basic_ostream< _CharT, _Traits > & std::basic_ostream< _CharT, _Traits >::operator<< (int __n) [inline, inherited]¶
Extracting from another streambuf. Parameters:
This function behaves like one of the basic arithmetic extractors, in that it also constructs a sentry object and has the same error handling behavior.
If sb is NULL, the stream will set failbit in its error state.
Characters are extracted from sb and inserted into *this until one of the following occurs:
- the input stream reaches end-of-file,
- insertion into the output sequence fails (in this case, the character that would have been inserted is not extracted), or
- an exception occurs while getting a character from sb, which sets failbit in the error state
If the function inserts no characters, failbit is set.
Definition at line 106 of file ostream.tcc.
References std::ios_base::basefield, std::ios_base::flags(), std::ios_base::hex, and std::ios_base::oct.
template<typename _CharT, typename _Traits> __ostream_type& std::basic_ostream< _CharT, _Traits >::operator<< (unsigned short __n) [inline, inherited]¶
Extracting from another streambuf. Parameters:
This function behaves like one of the basic arithmetic extractors, in that it also constructs a sentry object and has the same error handling behavior.
If sb is NULL, the stream will set failbit in its error state.
Characters are extracted from sb and inserted into *this until one of the following occurs:
- the input stream reaches end-of-file,
- insertion into the output sequence fails (in this case, the character that would have been inserted is not extracted), or
- an exception occurs while getting a character from sb, which sets failbit in the error state
If the function inserts no characters, failbit is set.
Definition at line 180 of file ostream.
template<typename _CharT , typename _Traits > basic_ostream< _CharT, _Traits > & std::basic_ostream< _CharT, _Traits >::operator<< (short __n) [inline, inherited]¶
Extracting from another streambuf. Parameters:
This function behaves like one of the basic arithmetic extractors, in that it also constructs a sentry object and has the same error handling behavior.
If sb is NULL, the stream will set failbit in its error state.
Characters are extracted from sb and inserted into *this until one of the following occurs:
- the input stream reaches end-of-file,
- insertion into the output sequence fails (in this case, the character that would have been inserted is not extracted), or
- an exception occurs while getting a character from sb, which sets failbit in the error state
If the function inserts no characters, failbit is set.
Definition at line 92 of file ostream.tcc.
References std::ios_base::basefield, std::ios_base::flags(), std::ios_base::hex, and std::ios_base::oct.
template<typename _CharT, typename _Traits> __ostream_type& std::basic_ostream< _CharT, _Traits >::operator<< (bool __n) [inline, inherited]¶
Extracting from another streambuf. Parameters:
This function behaves like one of the basic arithmetic extractors, in that it also constructs a sentry object and has the same error handling behavior.
If sb is NULL, the stream will set failbit in its error state.
Characters are extracted from sb and inserted into *this until one of the following occurs:
- the input stream reaches end-of-file,
- insertion into the output sequence fails (in this case, the character that would have been inserted is not extracted), or
- an exception occurs while getting a character from sb, which sets failbit in the error state
If the function inserts no characters, failbit is set.
Definition at line 173 of file ostream.
template<typename _CharT, typename _Traits> __ostream_type& std::basic_ostream< _CharT, _Traits >::operator<< (unsigned long __n) [inline, inherited]¶
Extracting from another streambuf. Parameters:
This function behaves like one of the basic arithmetic extractors, in that it also constructs a sentry object and has the same error handling behavior.
If sb is NULL, the stream will set failbit in its error state.
Characters are extracted from sb and inserted into *this until one of the following occurs:
- the input stream reaches end-of-file,
- insertion into the output sequence fails (in this case, the character that would have been inserted is not extracted), or
- an exception occurs while getting a character from sb, which sets failbit in the error state
If the function inserts no characters, failbit is set.
Definition at line 169 of file ostream.
template<typename _CharT, typename _Traits> __ostream_type& std::basic_ostream< _CharT, _Traits >::operator<< (long __n) [inline, inherited]¶
Basic arithmetic inserters. Parameters:
Returns:
These functions use the stream's current locale (specifically, the num_get facet) to perform numeric formatting.
Definition at line 165 of file ostream.
template<typename _CharT, typename _Traits> __ostream_type& std::basic_ostream< _CharT, _Traits >::operator<< (ios_base &(*)(ios_base &) __pf) [inline, inherited]¶
Interface for manipulators. Manipulators such as std::endl and std::hex use these functions in constructs like 'std::cout << std::endl'. For more information, see the iomanip header.
Definition at line 127 of file ostream.
template<typename _CharT, typename _Traits> __ostream_type& std::basic_ostream< _CharT, _Traits >::operator<< (__ios_type &(*)(__ios_type &) __pf) [inline, inherited]¶
Interface for manipulators. Manipulators such as std::endl and std::hex use these functions in constructs like 'std::cout << std::endl'. For more information, see the iomanip header.
Definition at line 117 of file ostream.
template<typename _CharT, typename _Traits> __ostream_type& std::basic_ostream< _CharT, _Traits >::operator<< (__ostream_type &(*)(__ostream_type &) __pf) [inline, inherited]¶
Interface for manipulators. Manipulators such as std::endl and std::hex use these functions in constructs like 'std::cout << std::endl'. For more information, see the iomanip header.
Definition at line 108 of file ostream.
streamsize std::ios_base::precision (streamsize __prec) [inline, inherited]¶
Changing flags. Parameters:
Returns:
Definition at line 634 of file ios_base.h.
streamsize std::ios_base::precision () const [inline, inherited]¶
Flags access. Returns:
Be careful if you try to give a definition of 'precision' here; see DR 189.
Definition at line 625 of file ios_base.h.
Referenced by std::basic_ios< _CharT, _Traits >::copyfmt(), and std::operator<<().
template<typename _CharT , typename _Traits > basic_ostream< _CharT, _Traits > & std::basic_ostream< _CharT, _Traits >::put (char_type __c) [inline, inherited]¶
Simple insertion. Parameters:
Returns:
Tries to insert c.
Note:
Definition at line 149 of file ostream.tcc.
References std::ios_base::badbit, std::ios_base::goodbit, std::basic_ios< _CharT, _Traits >::rdbuf(), and std::basic_ios< _CharT, _Traits >::setstate().
Referenced by std::endl(), and std::ends().
void*& std::ios_base::pword (int __ix) [inline, inherited]¶
Access to void pointer array. Parameters:
Returns:
The pword function provides access to an array of pointers that can be used for any purpose. The array grows as required to hold the supplied index. All pointers in the array are initialized to 0.
The implementation reserves several indices. You should use xalloc to obtain an index that is safe to use. Also note that since the array can grow dynamically, it is not safe to hold onto the reference.
Definition at line 766 of file ios_base.h.
template<typename _CharT, typename _Traits> basic_streambuf< _CharT, _Traits > * std::basic_ios< _CharT, _Traits >::rdbuf (basic_streambuf< _CharT, _Traits > * __sb) [inline, inherited]¶
Changing the underlying buffer. Parameters:
Returns:
Associates a new buffer with the current stream, and clears the error state.
Due to historical accidents which the LWG refuses to correct, the I/O library suffers from a design error: this function is hidden in derived classes by overrides of the zero-argument rdbuf(), which is non-virtual for hysterical raisins. As a result, you must use explicit qualifications to access this function via any derived class. For example:
std::fstream foo; // or some other derived type
std::streambuf* p = .....;
foo.ios::rdbuf(p); // ios == basic_ios<char>
Definition at line 52 of file basic_ios.tcc.
References std::basic_ios< _CharT, _Traits >::clear().
template<typename _CharT , typename _Traits > __filebuf_type* std::basic_ofstream< _CharT, _Traits >::rdbuf () const [inline]¶
Accessing the underlying buffer. Returns:
This hides both signatures of std::basic_ios::rdbuf().
Reimplemented from std::basic_ios< _CharT, _Traits >.
Definition at line 667 of file fstream.
template<typename _CharT, typename _Traits> iostate std::basic_ios< _CharT, _Traits >::rdstate () const [inline, inherited]¶
Returns the error state of the stream buffer. Returns:
See std::ios_base::iostate for the possible bit values. Most users will call one of the interpreting wrappers, e.g., good().
Definition at line 127 of file basic_ios.h.
void std::ios_base::register_callback (event_callback __fn, int __index) [inherited]¶
Add the callback __fn with parameter __index. Parameters:
__index The integer to pass to the function when invoked.
Registers a function as an event callback with an integer parameter to be passed to the function when invoked. Multiple copies of the function are allowed. If there are multiple callbacks, they are invoked in the order they were registered.
template<typename _CharT , typename _Traits > basic_ostream< _CharT, _Traits > & std::basic_ostream< _CharT, _Traits >::seekp (off_type __off, ios_base::seekdir __dir) [inline, inherited]¶
Changing the current write position. Parameters:
dir The direction in which to seek.
Returns:
If fail() is not true, calls rdbuf()->pubseekoff(off,dir). If that function fails, sets failbit.
Definition at line 290 of file ostream.tcc.
References std::ios_base::badbit, std::basic_ios< _CharT, _Traits >::fail(), std::ios_base::failbit, std::ios_base::goodbit, std::ios_base::out, std::basic_ios< _CharT, _Traits >::rdbuf(), and std::basic_ios< _CharT, _Traits >::setstate().
template<typename _CharT , typename _Traits > basic_ostream< _CharT, _Traits > & std::basic_ostream< _CharT, _Traits >::seekp (pos_type __pos) [inline, inherited]¶
Changing the current write position. Parameters:
Returns:
If fail() is not true, calls rdbuf()->pubseekpos(pos). If that function fails, sets failbit.
Definition at line 258 of file ostream.tcc.
References std::ios_base::badbit, std::basic_ios< _CharT, _Traits >::fail(), std::ios_base::failbit, std::ios_base::goodbit, std::ios_base::out, std::basic_ios< _CharT, _Traits >::rdbuf(), and std::basic_ios< _CharT, _Traits >::setstate().
fmtflags std::ios_base::setf (fmtflags __fmtfl, fmtflags __mask) [inline, inherited]¶
Setting new format flags. Parameters:
mask The flags mask for fmtfl.
Returns:
This function clears mask in the format flags, then sets fmtfl & mask. An example mask is ios_base::adjustfield.
Definition at line 599 of file ios_base.h.
fmtflags std::ios_base::setf (fmtflags __fmtfl) [inline, inherited]¶
Setting new format flags. Parameters:
Returns:
This function sets additional flags in format control. Flags that were previously set remain set.
Definition at line 582 of file ios_base.h.
Referenced by std::boolalpha(), std::dec(), std::fixed(), std::hex(), std::internal(), std::left(), std::oct(), std::right(), std::scientific(), std::showbase(), std::showpoint(), std::showpos(), std::skipws(), std::unitbuf(), and std::uppercase().
template<typename _CharT, typename _Traits> void std::basic_ios< _CharT, _Traits >::setstate (iostate __state) [inline, inherited]¶
Sets additional flags in the error state. Parameters:
See std::ios_base::iostate for the possible bit values.
Definition at line 147 of file basic_ios.h.
Referenced by std::basic_ostream< _CharT, _Traits >::flush(), std::basic_istream< _CharT, _Traits >::get(), std::basic_istream< _CharT, _Traits >::getline(), std::getline(), std::basic_istream< _CharT, _Traits >::ignore(), std::basic_ostream< _CharT, _Traits >::operator<<(), std::basic_istream< _CharT, _Traits >::operator>>(), std::operator>>(), std::basic_istream< _CharT, _Traits >::peek(), std::basic_ostream< _CharT, _Traits >::put(), std::basic_istream< _CharT, _Traits >::putback(), std::basic_istream< _CharT, _Traits >::read(), std::basic_istream< _CharT, _Traits >::readsome(), std::basic_istream< _CharT, _Traits >::seekg(), std::basic_ostream< _CharT, _Traits >::seekp(), std::basic_istream< _CharT, _Traits >::sync(), std::basic_istream< _CharT, _Traits >::unget(), and std::ws().
static bool std::ios_base::sync_with_stdio (bool __sync = true) [static, inherited]¶
Interaction with the standard C I/O objects. Parameters:
Returns:
The synchronization referred to is only that between the standard C facilities (e.g., stdout) and the standard C++ objects (e.g., cout). User-declared streams are unaffected. See http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt11ch28s02.html
template<typename _CharT , typename _Traits > basic_ostream< _CharT, _Traits >::pos_type std::basic_ostream< _CharT, _Traits >::tellp () [inline, inherited]¶
Getting the current write position. Returns:
If fail() is not false, returns pos_type(-1) to indicate failure. Otherwise returns rdbuf()->pubseekoff(0,cur,out).
Definition at line 237 of file ostream.tcc.
References std::ios_base::badbit, std::ios_base::cur, std::basic_ios< _CharT, _Traits >::fail(), std::ios_base::out, and std::basic_ios< _CharT, _Traits >::rdbuf().
template<typename _CharT, typename _Traits> basic_ostream<_CharT, _Traits>* std::basic_ios< _CharT, _Traits >::tie (basic_ostream< _CharT, _Traits > * __tiestr) [inline, inherited]¶
Ties this stream to an output stream. Parameters:
Returns:
This sets up a new tie; see tie() for more.
Definition at line 297 of file basic_ios.h.
template<typename _CharT, typename _Traits> basic_ostream<_CharT, _Traits>* std::basic_ios< _CharT, _Traits >::tie () const [inline, inherited]¶
Fetches the current tied stream. Returns:
A stream may be tied (or synchronized) to a second output stream. When this stream performs any I/O, the tied stream is first flushed. For example, std::cin is tied to std::cout.
Definition at line 285 of file basic_ios.h.
Referenced by std::basic_ios< _CharT, _Traits >::copyfmt().
void std::ios_base::unsetf (fmtflags __mask) [inline, inherited]¶
Clearing format flags. Parameters:
This function clears mask in the format flags.
Definition at line 614 of file ios_base.h.
Referenced by std::noboolalpha(), std::noshowbase(), std::noshowpoint(), std::noshowpos(), std::noskipws(), std::nounitbuf(), and std::nouppercase().
template<typename _CharT, typename _Traits> char_type std::basic_ios< _CharT, _Traits >::widen (char __c) const [inline, inherited]¶
Widens characters. Parameters:
Returns:
Maps a character of char to a character of char_type.
Returns the result of
std::use_facet<ctype<char_type> >(getloc()).widen(c)
Additional l10n notes are at http://gcc.gnu.org/onlinedocs/libstdc++/manual/localization.html
Definition at line 439 of file basic_ios.h.
Referenced by std::endl(), std::getline(), and std::operator>>().
streamsize std::ios_base::width (streamsize __wide) [inline, inherited]¶
Changing flags. Parameters:
Returns:
Definition at line 657 of file ios_base.h.
streamsize std::ios_base::width () const [inline, inherited]¶
Flags access. Returns:
Definition at line 648 of file ios_base.h.
Referenced by std::basic_ios< _CharT, _Traits >::copyfmt(), std::num_put< _CharT, _OutIter >::do_put(), and std::operator>>().
template<typename _CharT , typename _Traits > basic_ostream< _CharT, _Traits > & std::basic_ostream< _CharT, _Traits >::write (const char_type * __s, streamsize __n) [inline, inherited]¶
Character string insertion. Parameters:
n Maximum number of characters to insert.
Returns:
Characters are copied from s and inserted into the stream until one of the following happens:
- n characters are inserted
- inserting into the output sequence fails (in this case, badbit will be set in the stream's error state)
Note:
Definition at line 183 of file ostream.tcc.
References std::basic_ostream< _CharT, _Traits >::_M_write(), and std::ios_base::badbit.
static int std::ios_base::xalloc () throw () [static, inherited]¶
Access to unique indices. Returns:
This function returns a unique integer every time it is called. It can be used for any purpose, but is primarily intended to be a unique index for the iword and pword functions. The expectation is that an application calls xalloc in order to obtain an index in the iword and pword arrays that can be used without fear of conflict.
The implementation maintains a static variable that is incremented and returned on each invocation. xalloc is guaranteed to return an index that is safe to use in the iword and pword arrays.
Member Data Documentation¶
iostate std::ios_base::_M_exception [protected, inherited] ios_base data members (doc me)¶
Definition at line 467 of file ios_base.h.
Referenced by std::basic_ios< _CharT, _Traits >::init().
fmtflags std::ios_base::_M_flags [protected, inherited] ios_base data members (doc me)¶
Definition at line 466 of file ios_base.h.
streamsize std::ios_base::_M_precision [protected, inherited] ios_base data members (doc me)¶
Definition at line 464 of file ios_base.h.
iostate std::ios_base::_M_streambuf_state [protected, inherited] ios_base data members (doc me)¶
Definition at line 468 of file ios_base.h.
Referenced by std::basic_ios< _CharT, _Traits >::init().
streamsize std::ios_base::_M_width [protected, inherited] ios_base data members (doc me)¶
Definition at line 465 of file ios_base.h.
const fmtflags std::ios_base::adjustfield [static, inherited]¶
A mask of left|right|internal. Useful for the 2-arg form of setf.
Definition at line 318 of file ios_base.h.
Referenced by std::num_put< _CharT, _OutIter >::do_put().
const openmode std::ios_base::app [static, inherited]¶
Seek to end before each write.
Definition at line 372 of file ios_base.h.
const openmode std::ios_base::ate [static, inherited]¶
Open and seek to end immediately after opening.
Definition at line 375 of file ios_base.h.
Referenced by std::basic_filebuf< _CharT, _Traits >::open().
const iostate std::ios_base::badbit [static, inherited]¶
Indicates a loss of integrity in an input or output sequence (such as an irrecoverable read error from a file).
Definition at line 342 of file ios_base.h.
Referenced by std::basic_ostream< _CharT, _Traits >::flush(), std::basic_istream< _CharT, _Traits >::get(), std::basic_istream< _CharT, _Traits >::getline(), std::basic_istream< _CharT, _Traits >::ignore(), std::basic_ios< _CharT, _Traits >::init(), std::operator<<(), std::basic_ostream< _CharT, _Traits >::operator<<(), std::operator>>(), std::basic_istream< _CharT, _Traits >::peek(), std::basic_ostream< _CharT, _Traits >::put(), std::basic_istream< _CharT, _Traits >::putback(), std::basic_istream< _CharT, _Traits >::read(), std::basic_istream< _CharT, _Traits >::readsome(), std::basic_istream< _CharT, _Traits >::seekg(), std::basic_ostream< _CharT, _Traits >::seekp(), std::basic_istream< _CharT, _Traits >::sync(), std::basic_istream< _CharT, _Traits >::tellg(), std::basic_ostream< _CharT, _Traits >::tellp(), std::basic_istream< _CharT, _Traits >::unget(), and std::basic_ostream< _CharT, _Traits >::write().
const fmtflags std::ios_base::basefield [static, inherited]¶
A mask of dec|oct|hex. Useful for the 2-arg form of setf.
Definition at line 321 of file ios_base.h.
Referenced by std::num_get< _CharT, _InIter >::do_get(), and std::basic_ostream< _CharT, _Traits >::operator<<().
const seekdir std::ios_base::beg [static, inherited]¶
Request a seek relative to the beginning of the stream.
Definition at line 404 of file ios_base.h.
Referenced by std::basic_filebuf< _CharT, _Traits >::seekpos().
const openmode std::ios_base::binary [static, inherited]¶
Perform input and output in binary mode (as opposed to text mode). This is probably not what you think it is; see http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt11ch27s02.html.
Definition at line 380 of file ios_base.h.
Referenced by std::basic_filebuf< _CharT, _Traits >::showmanyc().
const fmtflags std::ios_base::boolalpha [static, inherited]¶
Insert/extract bool in alphabetic rather than numeric format.
Definition at line 266 of file ios_base.h.
Referenced by std::num_get< _CharT, _InIter >::do_get(), and std::num_put< _CharT, _OutIter >::do_put().
const seekdir std::ios_base::cur [static, inherited]¶
Request a seek relative to the current position within the sequence.
Definition at line 407 of file ios_base.h.
Referenced by std::basic_filebuf< _CharT, _Traits >::imbue(), std::basic_filebuf< _CharT, _Traits >::pbackfail(), std::basic_stringbuf< _CharT, _Traits, _Alloc >::seekoff(), std::basic_filebuf< _CharT, _Traits >::seekoff(), std::basic_istream< _CharT, _Traits >::tellg(), and std::basic_ostream< _CharT, _Traits >::tellp().
const fmtflags std::ios_base::dec [static, inherited]¶
Converts integer input or generates integer output in decimal base.
Definition at line 269 of file ios_base.h.
const seekdir std::ios_base::end [static, inherited]¶
Request a seek relative to the current end of the sequence.
Definition at line 410 of file ios_base.h.
Referenced by std::basic_filebuf< _CharT, _Traits >::open(), and std::basic_stringbuf< _CharT, _Traits, _Alloc >::seekoff().
const iostate std::ios_base::eofbit [static, inherited]¶
Indicates that an input operation reached the end of an input sequence.
Definition at line 345 of file ios_base.h.
Referenced by std::num_get< _CharT, _InIter >::do_get(), std::time_get< _CharT, _InIter >::do_get_date(), std::time_get< _CharT, _InIter >::do_get_monthname(), std::time_get< _CharT, _InIter >::do_get_time(), std::time_get< _CharT, _InIter >::do_get_weekday(), std::time_get< _CharT, _InIter >::do_get_year(), std::basic_istream< _CharT, _Traits >::get(), std::basic_istream< _CharT, _Traits >::getline(), std::basic_istream< _CharT, _Traits >::ignore(), std::operator>>(), std::basic_istream< _CharT, _Traits >::operator>>(), std::basic_istream< _CharT, _Traits >::peek(), std::basic_istream< _CharT, _Traits >::read(), std::basic_istream< _CharT, _Traits >::readsome(), and std::ws().
const iostate std::ios_base::failbit [static, inherited]¶
Indicates that an input operation failed to read the expected characters, or that an output operation failed to generate the desired characters.
Definition at line 350 of file ios_base.h.
Referenced by std::num_get< _CharT, _InIter >::do_get(), std::time_get< _CharT, _InIter >::do_get_monthname(), std::time_get< _CharT, _InIter >::do_get_weekday(), std::time_get< _CharT, _InIter >::do_get_year(), std::basic_istream< _CharT, _Traits >::get(), std::basic_istream< _CharT, _Traits >::getline(), std::basic_ostream< _CharT, _Traits >::operator<<(), std::basic_istream< _CharT, _Traits >::operator>>(), std::operator>>(), std::basic_istream< _CharT, _Traits >::read(), std::basic_istream< _CharT, _Traits >::seekg(), and std::basic_ostream< _CharT, _Traits >::seekp().
const fmtflags std::ios_base::fixed [static, inherited]¶
Generate floating-point output in fixed-point notation.
Definition at line 272 of file ios_base.h.
const fmtflags std::ios_base::floatfield [static, inherited]¶
A mask of scientific|fixed. Useful for the 2-arg form of setf.
Definition at line 324 of file ios_base.h.
const iostate std::ios_base::goodbit [static, inherited]¶
Indicates all is well.
Definition at line 353 of file ios_base.h.
Referenced by std::num_get< _CharT, _InIter >::do_get(), std::time_get< _CharT, _InIter >::do_get_monthname(), std::time_get< _CharT, _InIter >::do_get_weekday(), std::basic_ostream< _CharT, _Traits >::flush(), std::basic_istream< _CharT, _Traits >::get(), std::basic_istream< _CharT, _Traits >::getline(), std::basic_istream< _CharT, _Traits >::ignore(), std::basic_ios< _CharT, _Traits >::init(), std::basic_ostream< _CharT, _Traits >::operator<<(), std::operator>>(), std::basic_istream< _CharT, _Traits >::operator>>(), std::basic_istream< _CharT, _Traits >::peek(), std::basic_ostream< _CharT, _Traits >::put(), std::basic_istream< _CharT, _Traits >::putback(), std::basic_istream< _CharT, _Traits >::read(), std::basic_istream< _CharT, _Traits >::readsome(), std::basic_istream< _CharT, _Traits >::seekg(), std::basic_ostream< _CharT, _Traits >::seekp(), std::basic_istream< _CharT, _Traits >::sync(), and std::basic_istream< _CharT, _Traits >::unget().
const fmtflags std::ios_base::hex [static, inherited]¶
Converts integer input or generates integer output in hexadecimal base.
Definition at line 275 of file ios_base.h.
Referenced by std::num_get< _CharT, _InIter >::do_get(), std::num_put< _CharT, _OutIter >::do_put(), and std::basic_ostream< _CharT, _Traits >::operator<<().
const openmode std::ios_base::in [static, inherited]¶
Open for input. Default for ifstream and fstream.
Definition at line 383 of file ios_base.h.
Referenced by std::basic_filebuf< _CharT, _Traits >::pbackfail(), std::basic_istream< _CharT, _Traits >::seekg(), std::basic_stringbuf< _CharT, _Traits, _Alloc >::seekoff(), std::basic_stringbuf< _CharT, _Traits, _Alloc >::seekpos(), std::basic_filebuf< _CharT, _Traits >::showmanyc(), std::basic_istream< _CharT, _Traits >::tellg(), std::basic_stringbuf< _CharT, _Traits, _Alloc >::underflow(), std::basic_filebuf< _CharT, _Traits >::underflow(), and std::basic_filebuf< _CharT, _Traits >::xsgetn().
const fmtflags std::ios_base::internal [static, inherited]¶
Adds fill characters at a designated internal point in certain generated output, or identical to right if no such point is designated.
Definition at line 280 of file ios_base.h.
const fmtflags std::ios_base::left [static, inherited]¶
Adds fill characters on the right (final positions) of certain generated output. (I.e., the thing you print is flush left.).
Definition at line 284 of file ios_base.h.
Referenced by std::num_put< _CharT, _OutIter >::do_put().
const fmtflags std::ios_base::oct [static, inherited]¶
Converts integer input or generates integer output in octal base.
Definition at line 287 of file ios_base.h.
Referenced by std::basic_ostream< _CharT, _Traits >::operator<<().
const openmode std::ios_base::out [static, inherited]¶
Open for output. Default for ofstream and fstream.
Definition at line 386 of file ios_base.h.
Referenced by std::basic_stringbuf< _CharT, _Traits, _Alloc >::overflow(), std::basic_filebuf< _CharT, _Traits >::overflow(), std::basic_stringbuf< _CharT, _Traits, _Alloc >::seekoff(), std::basic_ostream< _CharT, _Traits >::seekp(), std::basic_stringbuf< _CharT, _Traits, _Alloc >::seekpos(), std::basic_ostream< _CharT, _Traits >::tellp(), and std::basic_filebuf< _CharT, _Traits >::xsputn().
const fmtflags std::ios_base::right [static, inherited]¶
Adds fill characters on the left (initial positions) of certain generated output. (I.e., the thing you print is flush right.).
Definition at line 291 of file ios_base.h.
const fmtflags std::ios_base::scientific [static, inherited]¶
Generates floating-point output in scientific notation.
Definition at line 294 of file ios_base.h.
const fmtflags std::ios_base::showbase [static, inherited]¶
Generates a prefix indicating the numeric base of generated integer output.
Definition at line 298 of file ios_base.h.
const fmtflags std::ios_base::showpoint [static, inherited]¶
Generates a decimal-point character unconditionally in generated floating-point output.
Definition at line 302 of file ios_base.h.
const fmtflags std::ios_base::showpos [static, inherited]¶
Generates a + sign in non-negative generated numeric output.
Definition at line 305 of file ios_base.h.
const fmtflags std::ios_base::skipws [static, inherited]¶
Skips leading white space before certain input operations.
Definition at line 308 of file ios_base.h.
const openmode std::ios_base::trunc [static, inherited]¶
Open for input. Default for ofstream.
Definition at line 389 of file ios_base.h.
const fmtflags std::ios_base::unitbuf [static, inherited]¶
Flushes output after each output operation.
Definition at line 311 of file ios_base.h.
const fmtflags std::ios_base::uppercase [static, inherited]¶
Replaces certain lowercase letters with their uppercase equivalents in generated output.
Definition at line 315 of file ios_base.h.
Referenced by std::num_put< _CharT, _OutIter >::do_put().
Author¶
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| 19 Jun 2018 | libstdc++ |