1 // Iostreams base classes -*- C++ -*-
3 // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
4 // 2006, 2007, 2008, 2009, 2010
5 // Free Software Foundation, Inc.
7 // This file is part of the GNU ISO C++ Library. This library is free
8 // software; you can redistribute it and/or modify it under the
9 // terms of the GNU General Public License as published by the
10 // Free Software Foundation; either version 3, or (at your option)
13 // This library is distributed in the hope that it will be useful,
14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 // GNU General Public License for more details.
18 // Under Section 7 of GPL version 3, you are granted additional
19 // permissions described in the GCC Runtime Library Exception, version
20 // 3.1, as published by the Free Software Foundation.
22 // You should have received a copy of the GNU General Public License and
23 // a copy of the GCC Runtime Library Exception along with this program;
24 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
25 // <http://www.gnu.org/licenses/>.
28 * This is an internal header file, included by other library headers.
29 * You should not attempt to use it directly.
33 // ISO C++ 14882: 27.4 Iostreams base classes
39 #pragma GCC system_header
41 #include <ext/atomicity.h>
42 #include <bits/localefwd.h>
43 #include <bits/locale_classes.h>
45 #ifndef _GLIBCXX_STDIO_MACROS
46 # include <cstdio> // For SEEK_CUR, SEEK_END
47 # define _IOS_BASE_SEEK_CUR SEEK_CUR
48 # define _IOS_BASE_SEEK_END SEEK_END
50 # define _IOS_BASE_SEEK_CUR 1
51 # define _IOS_BASE_SEEK_END 2
54 _GLIBCXX_BEGIN_NAMESPACE(std
)
56 // The following definitions of bitmask types are enums, not ints,
57 // as permitted (but not required) in the standard, in order to provide
58 // better type safety in iostream calls. A side effect is that
59 // expressions involving them are no longer compile-time constants.
62 _S_boolalpha
= 1L << 0,
66 _S_internal
= 1L << 4,
70 _S_scientific
= 1L << 8,
71 _S_showbase
= 1L << 9,
72 _S_showpoint
= 1L << 10,
73 _S_showpos
= 1L << 11,
75 _S_unitbuf
= 1L << 13,
76 _S_uppercase
= 1L << 14,
77 _S_adjustfield
= _S_left
| _S_right
| _S_internal
,
78 _S_basefield
= _S_dec
| _S_oct
| _S_hex
,
79 _S_floatfield
= _S_scientific
| _S_fixed
,
80 _S_ios_fmtflags_end
= 1L << 16
84 operator&(_Ios_Fmtflags __a
, _Ios_Fmtflags __b
)
85 { return _Ios_Fmtflags(static_cast<int>(__a
) & static_cast<int>(__b
)); }
88 operator|(_Ios_Fmtflags __a
, _Ios_Fmtflags __b
)
89 { return _Ios_Fmtflags(static_cast<int>(__a
) | static_cast<int>(__b
)); }
92 operator^(_Ios_Fmtflags __a
, _Ios_Fmtflags __b
)
93 { return _Ios_Fmtflags(static_cast<int>(__a
) ^ static_cast<int>(__b
)); }
96 operator|=(_Ios_Fmtflags
& __a
, _Ios_Fmtflags __b
)
97 { return __a
= __a
| __b
; }
100 operator&=(_Ios_Fmtflags
& __a
, _Ios_Fmtflags __b
)
101 { return __a
= __a
& __b
; }
103 inline _Ios_Fmtflags
&
104 operator^=(_Ios_Fmtflags
& __a
, _Ios_Fmtflags __b
)
105 { return __a
= __a
^ __b
; }
108 operator~(_Ios_Fmtflags __a
)
109 { return _Ios_Fmtflags(~static_cast<int>(__a
)); }
120 _S_ios_openmode_end
= 1L << 16
124 operator&(_Ios_Openmode __a
, _Ios_Openmode __b
)
125 { return _Ios_Openmode(static_cast<int>(__a
) & static_cast<int>(__b
)); }
128 operator|(_Ios_Openmode __a
, _Ios_Openmode __b
)
129 { return _Ios_Openmode(static_cast<int>(__a
) | static_cast<int>(__b
)); }
132 operator^(_Ios_Openmode __a
, _Ios_Openmode __b
)
133 { return _Ios_Openmode(static_cast<int>(__a
) ^ static_cast<int>(__b
)); }
135 inline _Ios_Openmode
&
136 operator|=(_Ios_Openmode
& __a
, _Ios_Openmode __b
)
137 { return __a
= __a
| __b
; }
139 inline _Ios_Openmode
&
140 operator&=(_Ios_Openmode
& __a
, _Ios_Openmode __b
)
141 { return __a
= __a
& __b
; }
143 inline _Ios_Openmode
&
144 operator^=(_Ios_Openmode
& __a
, _Ios_Openmode __b
)
145 { return __a
= __a
^ __b
; }
148 operator~(_Ios_Openmode __a
)
149 { return _Ios_Openmode(~static_cast<int>(__a
)); }
157 _S_failbit
= 1L << 2,
158 _S_ios_iostate_end
= 1L << 16
162 operator&(_Ios_Iostate __a
, _Ios_Iostate __b
)
163 { return _Ios_Iostate(static_cast<int>(__a
) & static_cast<int>(__b
)); }
166 operator|(_Ios_Iostate __a
, _Ios_Iostate __b
)
167 { return _Ios_Iostate(static_cast<int>(__a
) | static_cast<int>(__b
)); }
170 operator^(_Ios_Iostate __a
, _Ios_Iostate __b
)
171 { return _Ios_Iostate(static_cast<int>(__a
) ^ static_cast<int>(__b
)); }
174 operator|=(_Ios_Iostate
& __a
, _Ios_Iostate __b
)
175 { return __a
= __a
| __b
; }
178 operator&=(_Ios_Iostate
& __a
, _Ios_Iostate __b
)
179 { return __a
= __a
& __b
; }
182 operator^=(_Ios_Iostate
& __a
, _Ios_Iostate __b
)
183 { return __a
= __a
^ __b
; }
186 operator~(_Ios_Iostate __a
)
187 { return _Ios_Iostate(~static_cast<int>(__a
)); }
192 _S_cur
= _IOS_BASE_SEEK_CUR
,
193 _S_end
= _IOS_BASE_SEEK_END
,
194 _S_ios_seekdir_end
= 1L << 16
197 // 27.4.2 Class ios_base
199 * @brief The base of the I/O class hierarchy.
202 * This class defines everything that can be defined about I/O that does
203 * not depend on the type of characters being input or output. Most
204 * people will only see @c ios_base when they need to specify the full
205 * name of the various I/O flags (e.g., the openmodes).
212 * @brief These are thrown to indicate problems with io.
213 * @ingroup exceptions
215 * 27.4.2.1.1 Class ios_base::failure
217 class failure
: public exception
220 // _GLIBCXX_RESOLVE_LIB_DEFECTS
221 // 48. Use of non-existent exception constructor
223 failure(const string
& __str
) throw();
225 // This declaration is not useless:
226 // http://gcc.gnu.org/onlinedocs/gcc-4.3.2/gcc/Vague-Linkage.html
231 what() const throw();
237 // 27.4.2.1.2 Type ios_base::fmtflags
239 * @brief This is a bitmask type.
241 * @c @a _Ios_Fmtflags is implementation-defined, but it is valid to
242 * perform bitwise operations on these values and expect the Right
243 * Thing to happen. Defined objects of type fmtflags are:
263 typedef _Ios_Fmtflags fmtflags
;
265 /// Insert/extract @c bool in alphabetic rather than numeric format.
266 static const fmtflags boolalpha
= _S_boolalpha
;
268 /// Converts integer input or generates integer output in decimal base.
269 static const fmtflags dec
= _S_dec
;
271 /// Generate floating-point output in fixed-point notation.
272 static const fmtflags fixed
= _S_fixed
;
274 /// Converts integer input or generates integer output in hexadecimal base.
275 static const fmtflags hex
= _S_hex
;
277 /// Adds fill characters at a designated internal point in certain
278 /// generated output, or identical to @c right if no such point is
280 static const fmtflags internal
= _S_internal
;
282 /// Adds fill characters on the right (final positions) of certain
283 /// generated output. (I.e., the thing you print is flush left.)
284 static const fmtflags left
= _S_left
;
286 /// Converts integer input or generates integer output in octal base.
287 static const fmtflags oct
= _S_oct
;
289 /// Adds fill characters on the left (initial positions) of certain
290 /// generated output. (I.e., the thing you print is flush right.)
291 static const fmtflags right
= _S_right
;
293 /// Generates floating-point output in scientific notation.
294 static const fmtflags scientific
= _S_scientific
;
296 /// Generates a prefix indicating the numeric base of generated integer
298 static const fmtflags showbase
= _S_showbase
;
300 /// Generates a decimal-point character unconditionally in generated
301 /// floating-point output.
302 static const fmtflags showpoint
= _S_showpoint
;
304 /// Generates a + sign in non-negative generated numeric output.
305 static const fmtflags showpos
= _S_showpos
;
307 /// Skips leading white space before certain input operations.
308 static const fmtflags skipws
= _S_skipws
;
310 /// Flushes output after each output operation.
311 static const fmtflags unitbuf
= _S_unitbuf
;
313 /// Replaces certain lowercase letters with their uppercase equivalents
314 /// in generated output.
315 static const fmtflags uppercase
= _S_uppercase
;
317 /// A mask of left|right|internal. Useful for the 2-arg form of @c setf.
318 static const fmtflags adjustfield
= _S_adjustfield
;
320 /// A mask of dec|oct|hex. Useful for the 2-arg form of @c setf.
321 static const fmtflags basefield
= _S_basefield
;
323 /// A mask of scientific|fixed. Useful for the 2-arg form of @c setf.
324 static const fmtflags floatfield
= _S_floatfield
;
326 // 27.4.2.1.3 Type ios_base::iostate
328 * @brief This is a bitmask type.
330 * @c @a _Ios_Iostate is implementation-defined, but it is valid to
331 * perform bitwise operations on these values and expect the Right
332 * Thing to happen. Defined objects of type iostate are:
338 typedef _Ios_Iostate iostate
;
340 /// Indicates a loss of integrity in an input or output sequence (such
341 /// as an irrecoverable read error from a file).
342 static const iostate badbit
= _S_badbit
;
344 /// Indicates that an input operation reached the end of an input sequence.
345 static const iostate eofbit
= _S_eofbit
;
347 /// Indicates that an input operation failed to read the expected
348 /// characters, or that an output operation failed to generate the
349 /// desired characters.
350 static const iostate failbit
= _S_failbit
;
352 /// Indicates all is well.
353 static const iostate goodbit
= _S_goodbit
;
355 // 27.4.2.1.4 Type ios_base::openmode
357 * @brief This is a bitmask type.
359 * @c @a _Ios_Openmode is implementation-defined, but it is valid to
360 * perform bitwise operations on these values and expect the Right
361 * Thing to happen. Defined objects of type openmode are:
369 typedef _Ios_Openmode openmode
;
371 /// Seek to end before each write.
372 static const openmode app
= _S_app
;
374 /// Open and seek to end immediately after opening.
375 static const openmode ate
= _S_ate
;
377 /// Perform input and output in binary mode (as opposed to text mode).
378 /// This is probably not what you think it is; see
379 /// http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt11ch27s02.html
380 static const openmode binary
= _S_bin
;
382 /// Open for input. Default for @c ifstream and fstream.
383 static const openmode in
= _S_in
;
385 /// Open for output. Default for @c ofstream and fstream.
386 static const openmode out
= _S_out
;
388 /// Open for input. Default for @c ofstream.
389 static const openmode trunc
= _S_trunc
;
391 // 27.4.2.1.5 Type ios_base::seekdir
393 * @brief This is an enumerated type.
395 * @c @a _Ios_Seekdir is implementation-defined. Defined values
396 * of type seekdir are:
398 * - cur, equivalent to @c SEEK_CUR in the C standard library.
399 * - end, equivalent to @c SEEK_END in the C standard library.
401 typedef _Ios_Seekdir seekdir
;
403 /// Request a seek relative to the beginning of the stream.
404 static const seekdir beg
= _S_beg
;
406 /// Request a seek relative to the current position within the sequence.
407 static const seekdir cur
= _S_cur
;
409 /// Request a seek relative to the current end of the sequence.
410 static const seekdir end
= _S_end
;
413 typedef int io_state
;
414 typedef int open_mode
;
415 typedef int seek_dir
;
417 typedef std::streampos streampos
;
418 typedef std::streamoff streamoff
;
422 * @brief The set of events that may be passed to an event callback.
424 * erase_event is used during ~ios() and copyfmt(). imbue_event is used
425 * during imbue(). copyfmt_event is used during copyfmt().
435 * @brief The type of an event callback function.
436 * @param event One of the members of the event enum.
437 * @param ios_base Reference to the ios_base object.
438 * @param int The integer provided when the callback was registered.
440 * Event callbacks are user defined functions that get called during
441 * several ios_base and basic_ios functions, specifically imbue(),
442 * copyfmt(), and ~ios().
444 typedef void (*event_callback
) (event
, ios_base
&, int);
447 * @brief Add the callback __fn with parameter __index.
448 * @param __fn The function to add.
449 * @param __index The integer to pass to the function when invoked.
451 * Registers a function as an event callback with an integer parameter to
452 * be passed to the function when invoked. Multiple copies of the
453 * function are allowed. If there are multiple callbacks, they are
454 * invoked in the order they were registered.
457 register_callback(event_callback __fn
, int __index
);
460 streamsize _M_precision
;
463 iostate _M_exception
;
464 iostate _M_streambuf_state
;
466 // 27.4.2.6 Members for callbacks
467 // 27.4.2.6 ios_base callbacks
468 struct _Callback_list
471 _Callback_list
* _M_next
;
472 ios_base::event_callback _M_fn
;
474 _Atomic_word _M_refcount
; // 0 means one reference.
476 _Callback_list(ios_base::event_callback __fn
, int __index
,
477 _Callback_list
* __cb
)
478 : _M_next(__cb
), _M_fn(__fn
), _M_index(__index
), _M_refcount(0) { }
481 _M_add_reference() { __gnu_cxx::__atomic_add_dispatch(&_M_refcount
, 1); }
483 // 0 => OK to delete.
485 _M_remove_reference()
486 { return __gnu_cxx::__exchange_and_add_dispatch(&_M_refcount
, -1); }
489 _Callback_list
* _M_callbacks
;
492 _M_call_callbacks(event __ev
) throw();
495 _M_dispose_callbacks(void) throw();
497 // 27.4.2.5 Members for iword/pword storage
502 _Words() : _M_pword(0), _M_iword(0) { }
505 // Only for failed iword/pword calls.
508 // Guaranteed storage.
509 // The first 5 iword and pword slots are reserved for internal use.
510 enum { _S_local_word_size
= 8 };
511 _Words _M_local_word
[_S_local_word_size
];
513 // Allocated storage.
518 _M_grow_words(int __index
, bool __iword
);
520 // Members for locale and locale caching.
521 locale _M_ios_locale
;
528 // 27.4.2.1.6 Class ios_base::Init
529 // Used to initialize standard streams. In theory, g++ could use
530 // -finit-priority to order this stuff correctly without going
531 // through these machinations.
534 friend class ios_base
;
540 static _Atomic_word _S_refcount
;
541 static bool _S_synced_with_stdio
;
544 // [27.4.2.2] fmtflags state functions
546 * @brief Access to format flags.
547 * @return The format control flags for both input and output.
554 * @brief Setting new format flags all at once.
555 * @param fmtfl The new flags to set.
556 * @return The previous format control flags.
558 * This function overwrites all the format flags with @a fmtfl.
561 flags(fmtflags __fmtfl
)
563 fmtflags __old
= _M_flags
;
569 * @brief Setting new format flags.
570 * @param fmtfl Additional flags to set.
571 * @return The previous format control flags.
573 * This function sets additional flags in format control. Flags that
574 * were previously set remain set.
577 setf(fmtflags __fmtfl
)
579 fmtflags __old
= _M_flags
;
585 * @brief Setting new format flags.
586 * @param fmtfl Additional flags to set.
587 * @param mask The flags mask for @a fmtfl.
588 * @return The previous format control flags.
590 * This function clears @a mask in the format flags, then sets
591 * @a fmtfl @c & @a mask. An example mask is @c ios_base::adjustfield.
594 setf(fmtflags __fmtfl
, fmtflags __mask
)
596 fmtflags __old
= _M_flags
;
598 _M_flags
|= (__fmtfl
& __mask
);
603 * @brief Clearing format flags.
604 * @param mask The flags to unset.
606 * This function clears @a mask in the format flags.
609 unsetf(fmtflags __mask
)
610 { _M_flags
&= ~__mask
; }
613 * @brief Flags access.
614 * @return The precision to generate on certain output operations.
616 * Be careful if you try to give a definition of @a precision here; see
621 { return _M_precision
; }
624 * @brief Changing flags.
625 * @param prec The new precision value.
626 * @return The previous value of precision().
629 precision(streamsize __prec
)
631 streamsize __old
= _M_precision
;
632 _M_precision
= __prec
;
637 * @brief Flags access.
638 * @return The minimum field width to generate on output operations.
640 * <em>Minimum field width</em> refers to the number of characters.
647 * @brief Changing flags.
648 * @param wide The new width value.
649 * @return The previous value of width().
652 width(streamsize __wide
)
654 streamsize __old
= _M_width
;
659 // [27.4.2.4] ios_base static members
661 * @brief Interaction with the standard C I/O objects.
662 * @param sync Whether to synchronize or not.
663 * @return True if the standard streams were previously synchronized.
665 * The synchronization referred to is @e only that between the standard
666 * C facilities (e.g., stdout) and the standard C++ objects (e.g.,
667 * cout). User-declared streams are unaffected. See
668 * http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt11ch28s02.html
671 sync_with_stdio(bool __sync
= true);
673 // [27.4.2.3] ios_base locale functions
675 * @brief Setting a new locale.
676 * @param loc The new locale.
677 * @return The previous locale.
679 * Sets the new locale for this stream, and then invokes each callback
683 imbue(const locale
& __loc
) throw();
686 * @brief Locale access
687 * @return A copy of the current locale.
689 * If @c imbue(loc) has previously been called, then this function
690 * returns @c loc. Otherwise, it returns a copy of @c std::locale(),
691 * the global C++ locale.
695 { return _M_ios_locale
; }
698 * @brief Locale access
699 * @return A reference to the current locale.
701 * Like getloc above, but returns a reference instead of
706 { return _M_ios_locale
; }
708 // [27.4.2.5] ios_base storage functions
710 * @brief Access to unique indices.
711 * @return An integer different from all previous calls.
713 * This function returns a unique integer every time it is called. It
714 * can be used for any purpose, but is primarily intended to be a unique
715 * index for the iword and pword functions. The expectation is that an
716 * application calls xalloc in order to obtain an index in the iword and
717 * pword arrays that can be used without fear of conflict.
719 * The implementation maintains a static variable that is incremented and
720 * returned on each invocation. xalloc is guaranteed to return an index
721 * that is safe to use in the iword and pword arrays.
727 * @brief Access to integer array.
728 * @param __ix Index into the array.
729 * @return A reference to an integer associated with the index.
731 * The iword function provides access to an array of integers that can be
732 * used for any purpose. The array grows as required to hold the
733 * supplied index. All integers in the array are initialized to 0.
735 * The implementation reserves several indices. You should use xalloc to
736 * obtain an index that is safe to use. Also note that since the array
737 * can grow dynamically, it is not safe to hold onto the reference.
742 _Words
& __word
= (__ix
< _M_word_size
)
743 ? _M_word
[__ix
] : _M_grow_words(__ix
, true);
744 return __word
._M_iword
;
748 * @brief Access to void pointer array.
749 * @param __ix Index into the array.
750 * @return A reference to a void* associated with the index.
752 * The pword function provides access to an array of pointers that can be
753 * used for any purpose. The array grows as required to hold the
754 * supplied index. All pointers in the array are initialized to 0.
756 * The implementation reserves several indices. You should use xalloc to
757 * obtain an index that is safe to use. Also note that since the array
758 * can grow dynamically, it is not safe to hold onto the reference.
763 _Words
& __word
= (__ix
< _M_word_size
)
764 ? _M_word
[__ix
] : _M_grow_words(__ix
, false);
765 return __word
._M_pword
;
770 * Invokes each callback with erase_event. Destroys local storage.
772 * Note that the ios_base object for the standard streams never gets
773 * destroyed. As a result, any callbacks registered with the standard
774 * streams will not get invoked with erase_event (unless copyfmt is
782 // _GLIBCXX_RESOLVE_LIB_DEFECTS
783 // 50. Copy constructor and assignment operator of ios_base
785 ios_base(const ios_base
&);
788 operator=(const ios_base
&);
791 // [27.4.5.1] fmtflags manipulators
792 /// Calls base.setf(ios_base::boolalpha).
794 boolalpha(ios_base
& __base
)
796 __base
.setf(ios_base::boolalpha
);
800 /// Calls base.unsetf(ios_base::boolalpha).
802 noboolalpha(ios_base
& __base
)
804 __base
.unsetf(ios_base::boolalpha
);
808 /// Calls base.setf(ios_base::showbase).
810 showbase(ios_base
& __base
)
812 __base
.setf(ios_base::showbase
);
816 /// Calls base.unsetf(ios_base::showbase).
818 noshowbase(ios_base
& __base
)
820 __base
.unsetf(ios_base::showbase
);
824 /// Calls base.setf(ios_base::showpoint).
826 showpoint(ios_base
& __base
)
828 __base
.setf(ios_base::showpoint
);
832 /// Calls base.unsetf(ios_base::showpoint).
834 noshowpoint(ios_base
& __base
)
836 __base
.unsetf(ios_base::showpoint
);
840 /// Calls base.setf(ios_base::showpos).
842 showpos(ios_base
& __base
)
844 __base
.setf(ios_base::showpos
);
848 /// Calls base.unsetf(ios_base::showpos).
850 noshowpos(ios_base
& __base
)
852 __base
.unsetf(ios_base::showpos
);
856 /// Calls base.setf(ios_base::skipws).
858 skipws(ios_base
& __base
)
860 __base
.setf(ios_base::skipws
);
864 /// Calls base.unsetf(ios_base::skipws).
866 noskipws(ios_base
& __base
)
868 __base
.unsetf(ios_base::skipws
);
872 /// Calls base.setf(ios_base::uppercase).
874 uppercase(ios_base
& __base
)
876 __base
.setf(ios_base::uppercase
);
880 /// Calls base.unsetf(ios_base::uppercase).
882 nouppercase(ios_base
& __base
)
884 __base
.unsetf(ios_base::uppercase
);
888 /// Calls base.setf(ios_base::unitbuf).
890 unitbuf(ios_base
& __base
)
892 __base
.setf(ios_base::unitbuf
);
896 /// Calls base.unsetf(ios_base::unitbuf).
898 nounitbuf(ios_base
& __base
)
900 __base
.unsetf(ios_base::unitbuf
);
904 // [27.4.5.2] adjustfield manipulators
905 /// Calls base.setf(ios_base::internal, ios_base::adjustfield).
907 internal(ios_base
& __base
)
909 __base
.setf(ios_base::internal
, ios_base::adjustfield
);
913 /// Calls base.setf(ios_base::left, ios_base::adjustfield).
915 left(ios_base
& __base
)
917 __base
.setf(ios_base::left
, ios_base::adjustfield
);
921 /// Calls base.setf(ios_base::right, ios_base::adjustfield).
923 right(ios_base
& __base
)
925 __base
.setf(ios_base::right
, ios_base::adjustfield
);
929 // [27.4.5.3] basefield manipulators
930 /// Calls base.setf(ios_base::dec, ios_base::basefield).
932 dec(ios_base
& __base
)
934 __base
.setf(ios_base::dec
, ios_base::basefield
);
938 /// Calls base.setf(ios_base::hex, ios_base::basefield).
940 hex(ios_base
& __base
)
942 __base
.setf(ios_base::hex
, ios_base::basefield
);
946 /// Calls base.setf(ios_base::oct, ios_base::basefield).
948 oct(ios_base
& __base
)
950 __base
.setf(ios_base::oct
, ios_base::basefield
);
954 // [27.4.5.4] floatfield manipulators
955 /// Calls base.setf(ios_base::fixed, ios_base::floatfield).
957 fixed(ios_base
& __base
)
959 __base
.setf(ios_base::fixed
, ios_base::floatfield
);
963 /// Calls base.setf(ios_base::scientific, ios_base::floatfield).
965 scientific(ios_base
& __base
)
967 __base
.setf(ios_base::scientific
, ios_base::floatfield
);
971 _GLIBCXX_END_NAMESPACE
973 #undef _IOS_BASE_SEEK_CUR
974 #undef _IOS_BASE_SEEK_END
976 #endif /* _IOS_BASE_H */