Provided by: libstdc++-4.8-doc_4.8.5-4ubuntu8_all bug

NAME

       std::basic_ios< _CharT, _Traits >

SYNOPSIS

       Inherits std::ios_base.

   Public Types
       enum event { erase_event, imbue_event, copyfmt_event }
       typedef void(* event_callback) (event __e, ios_base &__b, int __i)
       typedef _Ios_Fmtflags fmtflags
       typedef int io_state
       typedef _Ios_Iostate iostate
       typedef int open_mode
       typedef _Ios_Openmode openmode
       typedef int seek_dir
       typedef _Ios_Seekdir seekdir
       typedef std::streamoff streamoff
       typedef std::streampos streampos

           typedef _CharT char_type
           typedef _Traits::int_type int_type
           typedef _Traits::pos_type pos_type
           typedef _Traits::off_type off_type
           typedef _Traits traits_type

           typedef ctype< _CharT > __ctype_type
           typedef num_put< _CharT, ostreambuf_iterator< _CharT, _Traits > > __num_put_type
           typedef num_get< _CharT, istreambuf_iterator< _CharT, _Traits > > __num_get_type

   Public Member Functions
       basic_ios (basic_streambuf< _CharT, _Traits > *__sb)
       virtual ~basic_ios ()
       const locale & _M_getloc () const
       void _M_setstate (iostate __state)
       bool bad () const
       void clear (iostate __state=goodbit)
       basic_ios & copyfmt (const basic_ios &__rhs)
       bool eof () const
       iostate exceptions () const
       void exceptions (iostate __except)
       bool fail () const
       char_type fill () const
       char_type fill (char_type __ch)
       fmtflags flags () const
       fmtflags flags (fmtflags __fmtfl)
       locale getloc () const
       bool good () const
       locale imbue (const locale &__loc)
       long & iword (int __ix)
       char narrow (char_type __c, char __dfault) const
       streamsize precision () const
       streamsize precision (streamsize __prec)
       void *& pword (int __ix)
       basic_streambuf< _CharT, _Traits > * rdbuf () const
       basic_streambuf< _CharT, _Traits > * rdbuf (basic_streambuf< _CharT, _Traits > *__sb)
       iostate rdstate () const
       void register_callback (event_callback __fn, int __index)
       fmtflags setf (fmtflags __fmtfl)
       fmtflags setf (fmtflags __fmtfl, fmtflags __mask)
       void setstate (iostate __state)
       basic_ostream< _CharT, _Traits > * tie () const
       basic_ostream< _CharT, _Traits > * tie (basic_ostream< _CharT, _Traits > *__tiestr)
       void unsetf (fmtflags __mask)
       char_type widen (char __c) const
       streamsize width () const
       streamsize width (streamsize __wide)

           operator void * () const
           bool operator! () const

   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
       basic_ios ()
       void _M_cache_locale (const locale &__loc)
       void _M_call_callbacks (event __ev)  throw ()
       void _M_dispose_callbacks (void)  throw ()
       _Words & _M_grow_words (int __index, bool __iword)
       void _M_init ()  throw ()
       void init (basic_streambuf< _CharT, _Traits > *__sb)

   Protected Attributes
       _Callback_list * _M_callbacks
       const __ctype_type * _M_ctype
       iostate _M_exception
       char_type _M_fill
       bool _M_fill_init
       fmtflags _M_flags
       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
       streamsize _M_precision
       basic_streambuf< _CharT, _Traits > * _M_streambuf
       iostate _M_streambuf_state
       basic_ostream< _CharT, _Traits > * _M_tie
       streamsize _M_width
       _Words * _M_word
       int _M_word_size
       _Words _M_word_zero

Detailed Description

   template<typename _CharT, typename _Traits>
       class std::basic_ios< _CharT, _Traits >" Template class basic_ios, virtual base class for
       all stream classes.

       Template Parameters:
           _CharT Type of character stream.
           _Traits Traits for character type, defaults to char_traits<_CharT>.

       Most of the member functions called dispatched on stream objects (e.g.,
       std::cout.foo(bar);) are consolidated in this class.

       Definition at line 66 of file basic_ios.h.

Member Typedef Documentation

   template<typename _CharT , typename _Traits > typedef ctype<_CharT> std::basic_ios< _CharT,
       _Traits >::__ctype_type
       These are non-standard types.

       Definition at line 86 of file basic_ios.h.

   template<typename _CharT , typename _Traits > typedef num_get<_CharT,
       istreambuf_iterator<_CharT, _Traits> > std::basic_ios< _CharT, _Traits >::__num_get_type
       These are non-standard types.

       Definition at line 90 of file basic_ios.h.

   template<typename _CharT , typename _Traits > typedef num_put<_CharT,
       ostreambuf_iterator<_CharT, _Traits> > std::basic_ios< _CharT, _Traits >::__num_put_type
       These are non-standard types.

       Definition at line 88 of file basic_ios.h.

   template<typename _CharT , typename _Traits > typedef _CharT std::basic_ios< _CharT, _Traits
       >::char_type
       These are standard types. They permit a standardized way of referring to names of (or
       names dependent on) the template parameters, which are specific to the implementation.

       Definition at line 75 of file basic_ios.h.

   typedef void(* std::ios_base::event_callback) (event __e, ios_base &__b, int __i) [inherited]
       The type of an event callback function.

       Parameters:
           __e One of the members of the event enum.
           __b Reference to the ios_base object.
           __i 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 442 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 261 of file ios_base.h.

   template<typename _CharT , typename _Traits > typedef _Traits::int_type std::basic_ios<
       _CharT, _Traits >::int_type
       These are standard types. They permit a standardized way of referring to names of (or
       names dependent on) the template parameters, which are specific to the implementation.

       Definition at line 76 of file basic_ios.h.

   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 336 of file ios_base.h.

   template<typename _CharT , typename _Traits > typedef _Traits::off_type std::basic_ios<
       _CharT, _Traits >::off_type
       These are standard types. They permit a standardized way of referring to names of (or
       names dependent on) the template parameters, which are specific to the implementation.

       Definition at line 78 of file basic_ios.h.

   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 367 of file ios_base.h.

   template<typename _CharT , typename _Traits > typedef _Traits::pos_type std::basic_ios<
       _CharT, _Traits >::pos_type
       These are standard types. They permit a standardized way of referring to names of (or
       names dependent on) the template parameters, which are specific to the implementation.

       Definition at line 77 of file basic_ios.h.

   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 399 of file ios_base.h.

   template<typename _CharT , typename _Traits > typedef _Traits std::basic_ios< _CharT, _Traits
       >::traits_type
       These are standard types. They permit a standardized way of referring to names of (or
       names dependent on) the template parameters, which are specific to the implementation.

       Definition at line 79 of file basic_ios.h.

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 425 of file ios_base.h.

Constructor & Destructor Documentation

   template<typename _CharT , typename _Traits > std::basic_ios< _CharT, _Traits >::basic_ios
       (basic_streambuf< _CharT, _Traits > * __sb) [inline],  [explicit]
       Constructor performs initialization. The parameter is passed by derived streams.

       Definition at line 264 of file basic_ios.h.

       References std::basic_ios< _CharT, _Traits >::init().

   template<typename _CharT , typename _Traits > virtual std::basic_ios< _CharT, _Traits
       >::~basic_ios () [inline],  [virtual]
       Empty. The destructor does nothing. More specifically, it does not destroy the streambuf
       held by rdbuf().

       Definition at line 276 of file basic_ios.h.

   template<typename _CharT , typename _Traits > std::basic_ios< _CharT, _Traits >::basic_ios ()
       [inline],  [protected]
       Empty. The default constructor does nothing and is not normally accessible to users.

       Definition at line 454 of file basic_ios.h.

       References std::basic_ios< _CharT, _Traits >::init().

Member Function Documentation

   const locale& std::ios_base::_M_getloc () const [inline],  [inherited]
       Locale access.

       Returns:
           A reference to the current locale.

       Like getloc above, but returns a reference instead of generating a copy.

       Definition at line 712 of file ios_base.h.

       References std::ios_base::xalloc().

   template<typename _CharT , typename _Traits > bool std::basic_ios< _CharT, _Traits >::bad ()
       const [inline]
       Fast error checking.

       Returns:
           True if the badbit is set.

       Note that other iostate flags may also be set.

       Definition at line 205 of file basic_ios.h.

       References std::ios_base::badbit, and std::basic_ios< _CharT, _Traits >::rdstate().

   template<typename _CharT , typename _Traits > void std::basic_ios< _CharT, _Traits >::clear
       (iostate __state = goodbit)
       [Re]sets the error state.

       Parameters:
           __state The new state flag(s) to set.

       See std::ios_base::iostate for the possible bit values. Most users will not need to pass
       an argument.

       Referenced by std::basic_ios< _CharT, _Traits >::exceptions(), std::basic_ios< _CharT,
       _Traits >::rdstate(), and std::basic_ios< _CharT, _Traits >::setstate().

   template<typename _CharT , typename _Traits > basic_ios& std::basic_ios< _CharT, _Traits
       >::copyfmt (const basic_ios< _CharT, _Traits > & __rhs)
       Copies fields of __rhs into this.

       Parameters:
           __rhs The source values for the copies.

       Returns:
           Reference to this object.

       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().

       Referenced by std::basic_ios< _CharT, _Traits >::rdbuf().

   template<typename _CharT , typename _Traits > bool std::basic_ios< _CharT, _Traits >::eof ()
       const [inline]
       Fast error checking.

       Returns:
           True if the eofbit is set.

       Note that other iostate flags may also be set.

       Definition at line 184 of file basic_ios.h.

       References std::ios_base::eofbit, and std::basic_ios< _CharT, _Traits >::rdstate().

   template<typename _CharT , typename _Traits > iostate std::basic_ios< _CharT, _Traits
       >::exceptions () const [inline]
       Throwing exceptions on errors.

       Returns:
           The current exceptions mask.

       This changes nothing in the stream. See the one-argument version of exceptions(iostate)
       for the meaning of the return value.

       Definition at line 216 of file basic_ios.h.

       Referenced by std::basic_ios< _CharT, _Traits >::setstate().

   template<typename _CharT , typename _Traits > void std::basic_ios< _CharT, _Traits
       >::exceptions (iostate __except) [inline]
       Throwing exceptions on errors.

       Parameters:
           __except The new exceptions mask.

       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 251 of file basic_ios.h.

       References std::basic_ios< _CharT, _Traits >::clear().

   template<typename _CharT , typename _Traits > bool std::basic_ios< _CharT, _Traits >::fail ()
       const [inline]
       Fast error checking.

       Returns:
           True if either the badbit or the failbit is set.

       Checking the badbit in fail() is historical practice. Note that other iostate flags may
       also be set.

       Definition at line 195 of file basic_ios.h.

       References std::ios_base::badbit, std::ios_base::failbit, and std::basic_ios< _CharT,
       _Traits >::rdstate().

       Referenced by std::basic_ios< _CharT, _Traits >::operator void *(), and std::basic_ios<
       _CharT, _Traits >::operator!().

   template<typename _CharT , typename _Traits > char_type std::basic_ios< _CharT, _Traits
       >::fill () const [inline]
       Retrieves the empty character.

       Returns:
           The current fill character.

       It defaults to a space (' ') in the current locale.

       Definition at line 364 of file basic_ios.h.

       References std::basic_ios< _CharT, _Traits >::widen().

       Referenced by std::basic_ios< _CharT, _Traits >::fill().

   template<typename _CharT , typename _Traits > char_type std::basic_ios< _CharT, _Traits
       >::fill (char_type __ch) [inline]
       Sets a new empty character.

       Parameters:
           __ch The new character.

       Returns:
           The previous fill character.

       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 384 of file basic_ios.h.

       References std::basic_ios< _CharT, _Traits >::fill(), and std::basic_ios< _CharT, _Traits
       >::imbue().

   fmtflags std::ios_base::flags () const [inline],  [inherited]
       Access to format flags.

       Returns:
           The format control flags for both input and output.

       Definition at line 557 of file ios_base.h.

   fmtflags std::ios_base::flags (fmtflags __fmtfl) [inline],  [inherited]
       Setting new format flags all at once.

       Parameters:
           __fmtfl The new flags to set.

       Returns:
           The previous format control flags.

       This function overwrites all the format flags with __fmtfl.

       Definition at line 568 of file ios_base.h.

   locale std::ios_base::getloc () const [inline],  [inherited]
       Locale access.

       Returns:
           A copy of the current locale.

       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 701 of file ios_base.h.

   template<typename _CharT , typename _Traits > bool std::basic_ios< _CharT, _Traits >::good ()
       const [inline]
       Fast error checking.

       Returns:
           True if no error flags are set.

       A wrapper around rdstate.

       Definition at line 174 of file basic_ios.h.

       References std::basic_ios< _CharT, _Traits >::rdstate().

   template<typename _CharT , typename _Traits > locale std::basic_ios< _CharT, _Traits >::imbue
       (const locale & __loc)
       Moves to a new locale.

       Parameters:
           __loc The new locale.

       Returns:
           The previous locale.

       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

       Referenced by std::basic_ios< _CharT, _Traits >::fill().

   template<typename _CharT , typename _Traits > void std::basic_ios< _CharT, _Traits >::init
       (basic_streambuf< _CharT, _Traits > * __sb) [protected]
       All setup is performed here. This is called from the public constructor. It is not virtual
       and cannot be redefined.

       Referenced by std::basic_ios< _CharT, _Traits >::basic_ios().

   long& std::ios_base::iword (int __ix) [inline],  [inherited]
       Access to integer array.

       Parameters:
           __ix Index into the array.

       Returns:
           A reference to an integer associated with the index.

       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 747 of file ios_base.h.

   template<typename _CharT , typename _Traits > char std::basic_ios< _CharT, _Traits >::narrow
       (char_type __c, char __dfault) const [inline]
       Squeezes characters.

       Parameters:
           __c The character to narrow.
           __dfault The character to narrow.

       Returns:
           The narrowed character.

       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 424 of file basic_ios.h.

   template<typename _CharT , typename _Traits > std::basic_ios< _CharT, _Traits >::operator void
       * () const [inline]
       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.

       References std::basic_ios< _CharT, _Traits >::fail().

   template<typename _CharT , typename _Traits > bool std::basic_ios< _CharT, _Traits
       >::operator! () const [inline]
       The quick-and-easy status check. This allows you to write constructs such as if
       (!a_stream) ... and while (a_stream) ...

       Definition at line 119 of file basic_ios.h.

       References std::basic_ios< _CharT, _Traits >::fail().

   streamsize std::ios_base::precision () const [inline],  [inherited]
       Flags access.

       Returns:
           The precision to generate on certain output operations.

       Be careful if you try to give a definition of precision here; see DR 189.

       Definition at line 627 of file ios_base.h.

   streamsize std::ios_base::precision (streamsize __prec) [inline],  [inherited]
       Changing flags.

       Parameters:
           __prec The new precision value.

       Returns:
           The previous value of precision().

       Definition at line 636 of file ios_base.h.

   void*& std::ios_base::pword (int __ix) [inline],  [inherited]
       Access to void pointer array.

       Parameters:
           __ix Index into the array.

       Returns:
           A reference to a void* associated with the index.

       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 768 of file ios_base.h.

       References std::ios_base::~ios_base().

   template<typename _CharT , typename _Traits > basic_streambuf<_CharT, _Traits>*
       std::basic_ios< _CharT, _Traits >::rdbuf () const [inline]
       Accessing the underlying buffer.

       Returns:
           The current stream buffer.

       This does not change the state of the stream.

       Definition at line 315 of file basic_ios.h.

       References std::basic_ios< _CharT, _Traits >::copyfmt().

   template<typename _CharT , typename _Traits > basic_streambuf<_CharT, _Traits>*
       std::basic_ios< _CharT, _Traits >::rdbuf (basic_streambuf< _CharT, _Traits > * __sb)
       Changing the underlying buffer.

       Parameters:
           __sb The new stream buffer.

       Returns:
           The previous stream buffer.

       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>

   template<typename _CharT , typename _Traits > iostate std::basic_ios< _CharT, _Traits
       >::rdstate () const [inline]
       Returns the error state of the stream buffer.

       Returns:
           A bit pattern (well, isn't everything?)

       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 131 of file basic_ios.h.

       References std::basic_ios< _CharT, _Traits >::clear(), and std::ios_base::goodbit.

       Referenced by std::basic_ios< _CharT, _Traits >::bad(), std::basic_ios< _CharT, _Traits
       >::eof(), std::basic_ios< _CharT, _Traits >::fail(), std::basic_ios< _CharT, _Traits
       >::good(), and std::basic_ios< _CharT, _Traits >::setstate().

   void std::ios_base::register_callback (event_callback __fn, int __index) [inherited]
       Add the callback __fn with parameter __index.

       Parameters:
           __fn The function to add.
           __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.

   fmtflags std::ios_base::setf (fmtflags __fmtfl) [inline],  [inherited]
       Setting new format flags.

       Parameters:
           __fmtfl Additional flags to set.

       Returns:
           The previous format control flags.

       This function sets additional flags in format control. Flags that were previously set
       remain set.

       Definition at line 584 of file ios_base.h.

       Referenced by std::boolalpha(), std::dec(), std::fixed(), std::hex(), std::left(),
       std::oct(), std::right(), std::scientific(), std::showbase(), std::showpoint(),
       std::showpos(), std::skipws(), std::unitbuf(), and std::uppercase().

   fmtflags std::ios_base::setf (fmtflags __fmtfl, fmtflags __mask) [inline],  [inherited]
       Setting new format flags.

       Parameters:
           __fmtfl Additional flags to set.
           __mask The flags mask for fmtfl.

       Returns:
           The previous format control flags.

       This function clears mask in the format flags, then sets fmtfl & mask. An example mask is
       ios_base::adjustfield.

       Definition at line 601 of file ios_base.h.

   template<typename _CharT , typename _Traits > void std::basic_ios< _CharT, _Traits >::setstate
       (iostate __state) [inline]
       Sets additional flags in the error state.

       Parameters:
           __state The additional state flag(s) to set.

       See std::ios_base::iostate for the possible bit values.

       Definition at line 151 of file basic_ios.h.

       References std::basic_ios< _CharT, _Traits >::clear(), std::basic_ios< _CharT, _Traits
       >::exceptions(), and std::basic_ios< _CharT, _Traits >::rdstate().

   static bool std::ios_base::sync_with_stdio (bool __sync = true) [static],  [inherited]
       Interaction with the standard C I/O objects.

       Parameters:
           __sync Whether to synchronize or not.

       Returns:
           True if the standard streams were previously synchronized.

       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

       Referenced by std::ios_base::width().

   template<typename _CharT , typename _Traits > basic_ostream<_CharT, _Traits>* std::basic_ios<
       _CharT, _Traits >::tie () const [inline]
       Fetches the current tied stream.

       Returns:
           A pointer to the tied stream, or NULL if the stream is not tied.

       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 289 of file basic_ios.h.

   template<typename _CharT , typename _Traits > basic_ostream<_CharT, _Traits>* std::basic_ios<
       _CharT, _Traits >::tie (basic_ostream< _CharT, _Traits > * __tiestr) [inline]
       Ties this stream to an output stream.

       Parameters:
           __tiestr The output stream.

       Returns:
           The previously tied output stream, or NULL if the stream was not tied.

       This sets up a new tie; see tie() for more.

       Definition at line 301 of file basic_ios.h.

   void std::ios_base::unsetf (fmtflags __mask) [inline],  [inherited]
       Clearing format flags.

       Parameters:
           __mask The flags to unset.

       This function clears __mask in the format flags.

       Definition at line 616 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]
       Widens characters.

       Parameters:
           __c The character to widen.

       Returns:
           The widened character.

       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 443 of file basic_ios.h.

       Referenced by std::basic_ios< _CharT, _Traits >::fill().

   streamsize std::ios_base::width () const [inline],  [inherited]
       Flags access.

       Returns:
           The minimum field width to generate on output operations.

       Minimum field width refers to the number of characters.

       Definition at line 650 of file ios_base.h.

   streamsize std::ios_base::width (streamsize __wide) [inline],  [inherited]
       Changing flags.

       Parameters:
           __wide The new width value.

       Returns:
           The previous value of width().

       Definition at line 659 of file ios_base.h.

       References std::ios_base::imbue(), and std::ios_base::sync_with_stdio().

   static int std::ios_base::xalloc () [static],  [inherited]
       Access to unique indices.

       Returns:
           An integer different from all previous calls.

       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.

       Referenced by std::ios_base::_M_getloc().

Member Data Documentation

   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 316 of file ios_base.h.

       Referenced by std::internal(), std::left(), and std::right().

   const openmode std::ios_base::app [static],  [inherited]
       Seek to end before each write.

       Definition at line 370 of file ios_base.h.

   const openmode std::ios_base::ate [static],  [inherited]
       Open and seek to end immediately after opening.

       Definition at line 373 of file ios_base.h.

   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 340 of file ios_base.h.

       Referenced by std::basic_ios< _CharT, _Traits >::bad(), and std::basic_ios< _CharT,
       _Traits >::fail().

   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 319 of file ios_base.h.

       Referenced by std::dec(), std::hex(), and std::oct().

   const seekdir std::ios_base::beg [static],  [inherited]
       Request a seek relative to the beginning of the stream.

       Definition at line 402 of file ios_base.h.

       Referenced by __gnu_cxx::stdio_sync_filebuf< _CharT, _Traits >::file().

   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 378 of file ios_base.h.

   const fmtflags std::ios_base::boolalpha [static],  [inherited]
       Insert/extract bool in alphabetic rather than numeric format.

       Definition at line 264 of file ios_base.h.

       Referenced by std::boolalpha(), and std::noboolalpha().

   const seekdir std::ios_base::cur [static],  [inherited]
       Request a seek relative to the current position within the sequence.

       Definition at line 405 of file ios_base.h.

       Referenced by __gnu_cxx::stdio_sync_filebuf< _CharT, _Traits >::file().

   const fmtflags std::ios_base::dec [static],  [inherited]
       Converts integer input or generates integer output in decimal base.

       Definition at line 267 of file ios_base.h.

       Referenced by std::dec().

   const seekdir std::ios_base::end [static],  [inherited]
       Request a seek relative to the current end of the sequence.

       Definition at line 408 of file ios_base.h.

   const iostate std::ios_base::eofbit [static],  [inherited]
       Indicates that an input operation reached the end of an input sequence.

       Definition at line 343 of file ios_base.h.

       Referenced by std::basic_ios< _CharT, _Traits >::eof().

   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 348 of file ios_base.h.

       Referenced by std::basic_ios< _CharT, _Traits >::fail().

   const fmtflags std::ios_base::fixed [static],  [inherited]
       Generate floating-point output in fixed-point notation.

       Definition at line 270 of file ios_base.h.

       Referenced by std::fixed().

   const fmtflags std::ios_base::floatfield [static],  [inherited]
       A mask of scientific|fixed. Useful for the 2-arg form of setf.

       Definition at line 322 of file ios_base.h.

       Referenced by std::fixed(), and std::scientific().

   const iostate std::ios_base::goodbit [static],  [inherited]
       Indicates all is well.

       Definition at line 351 of file ios_base.h.

       Referenced by std::basic_ios< _CharT, _Traits >::rdstate().

   const fmtflags std::ios_base::hex [static],  [inherited]
       Converts integer input or generates integer output in hexadecimal base.

       Definition at line 273 of file ios_base.h.

       Referenced by std::hex().

   const openmode std::ios_base::in [static],  [inherited]
       Open for input. Default for ifstream and fstream.

       Definition at line 381 of file ios_base.h.

       Referenced by __gnu_cxx::stdio_sync_filebuf< _CharT, _Traits >::file().

   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 278 of file ios_base.h.

       Referenced by std::internal().

   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 282 of file ios_base.h.

       Referenced by std::left().

   const fmtflags std::ios_base::oct [static],  [inherited]
       Converts integer input or generates integer output in octal base.

       Definition at line 285 of file ios_base.h.

       Referenced by std::oct().

   const openmode std::ios_base::out [static],  [inherited]
       Open for output. Default for ofstream and fstream.

       Definition at line 384 of file ios_base.h.

       Referenced by __gnu_cxx::stdio_sync_filebuf< _CharT, _Traits >::file().

   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 289 of file ios_base.h.

       Referenced by std::right().

   const fmtflags std::ios_base::scientific [static],  [inherited]
       Generates floating-point output in scientific notation.

       Definition at line 292 of file ios_base.h.

       Referenced by std::scientific().

   const fmtflags std::ios_base::showbase [static],  [inherited]
       Generates a prefix indicating the numeric base of generated integer output.

       Definition at line 296 of file ios_base.h.

       Referenced by std::noshowbase(), and std::showbase().

   const fmtflags std::ios_base::showpoint [static],  [inherited]
       Generates a decimal-point character unconditionally in generated floating-point output.

       Definition at line 300 of file ios_base.h.

       Referenced by std::noshowpoint(), and std::showpoint().

   const fmtflags std::ios_base::showpos [static],  [inherited]
       Generates a + sign in non-negative generated numeric output.

       Definition at line 303 of file ios_base.h.

       Referenced by std::noshowpos(), and std::showpos().

   const fmtflags std::ios_base::skipws [static],  [inherited]
       Skips leading white space before certain input operations.

       Definition at line 306 of file ios_base.h.

       Referenced by std::noskipws(), and std::skipws().

   const openmode std::ios_base::trunc [static],  [inherited]
       Open for input. Default for ofstream.

       Definition at line 387 of file ios_base.h.

   const fmtflags std::ios_base::unitbuf [static],  [inherited]
       Flushes output after each output operation.

       Definition at line 309 of file ios_base.h.

       Referenced by std::nounitbuf(), and std::unitbuf().

   const fmtflags std::ios_base::uppercase [static],  [inherited]
       Replaces certain lowercase letters with their uppercase equivalents in generated output.

       Definition at line 313 of file ios_base.h.

       Referenced by std::nouppercase(), and std::uppercase().

Author

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