1 // Standard stream manipulators -*- C++ -*-
3 // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
4 // 2006, 2007, 2008, 2009, 2010, 2011
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/>.
27 /** @file include/iomanip
28 * This is a Standard C++ Library header.
32 // ISO C++ 14882: 27.6.3 Standard manipulators
35 #ifndef _GLIBCXX_IOMANIP
36 #define _GLIBCXX_IOMANIP 1
38 #pragma GCC system_header
40 #include <bits/c++config.h>
42 #include <bits/ios_base.h>
44 #ifdef __GXX_EXPERIMENTAL_CXX0X__
48 namespace std _GLIBCXX_VISIBILITY(default)
50 _GLIBCXX_BEGIN_NAMESPACE_VERSION
52 // [27.6.3] standard manipulators
55 struct _Resetiosflags { ios_base::fmtflags _M_mask; };
58 * @brief Manipulator for @c setf.
59 * @param __mask A format flags mask.
61 * Sent to a stream object, this manipulator resets the specified flags,
62 * via @e stream.setf(0,__mask).
65 resetiosflags(ios_base::fmtflags __mask)
66 { return { __mask }; }
68 template<typename _CharT, typename _Traits>
69 inline basic_istream<_CharT, _Traits>&
70 operator>>(basic_istream<_CharT, _Traits>& __is, _Resetiosflags __f)
72 __is.setf(ios_base::fmtflags(0), __f._M_mask);
76 template<typename _CharT, typename _Traits>
77 inline basic_ostream<_CharT, _Traits>&
78 operator<<(basic_ostream<_CharT, _Traits>& __os, _Resetiosflags __f)
80 __os.setf(ios_base::fmtflags(0), __f._M_mask);
85 struct _Setiosflags { ios_base::fmtflags _M_mask; };
88 * @brief Manipulator for @c setf.
89 * @param __mask A format flags mask.
91 * Sent to a stream object, this manipulator sets the format flags
95 setiosflags(ios_base::fmtflags __mask)
96 { return { __mask }; }
98 template<typename _CharT, typename _Traits>
99 inline basic_istream<_CharT, _Traits>&
100 operator>>(basic_istream<_CharT, _Traits>& __is, _Setiosflags __f)
102 __is.setf(__f._M_mask);
106 template<typename _CharT, typename _Traits>
107 inline basic_ostream<_CharT, _Traits>&
108 operator<<(basic_ostream<_CharT, _Traits>& __os, _Setiosflags __f)
110 __os.setf(__f._M_mask);
115 struct _Setbase { int _M_base; };
118 * @brief Manipulator for @c setf.
119 * @param __base A numeric base.
121 * Sent to a stream object, this manipulator changes the
122 * @c ios_base::basefield flags to @c oct, @c dec, or @c hex when @a base
123 * is 8, 10, or 16, accordingly, and to 0 if @a __base is any other value.
127 { return { __base }; }
129 template<typename _CharT, typename _Traits>
130 inline basic_istream<_CharT, _Traits>&
131 operator>>(basic_istream<_CharT, _Traits>& __is, _Setbase __f)
133 __is.setf(__f._M_base == 8 ? ios_base::oct :
134 __f._M_base == 10 ? ios_base::dec :
135 __f._M_base == 16 ? ios_base::hex :
136 ios_base::fmtflags(0), ios_base::basefield);
140 template<typename _CharT, typename _Traits>
141 inline basic_ostream<_CharT, _Traits>&
142 operator<<(basic_ostream<_CharT, _Traits>& __os, _Setbase __f)
144 __os.setf(__f._M_base == 8 ? ios_base::oct :
145 __f._M_base == 10 ? ios_base::dec :
146 __f._M_base == 16 ? ios_base::hex :
147 ios_base::fmtflags(0), ios_base::basefield);
152 template<typename _CharT>
153 struct _Setfill { _CharT _M_c; };
156 * @brief Manipulator for @c fill.
157 * @param __c The new fill character.
159 * Sent to a stream object, this manipulator calls @c fill(__c) for that
162 template<typename _CharT>
163 inline _Setfill<_CharT>
167 template<typename _CharT, typename _Traits>
168 inline basic_istream<_CharT, _Traits>&
169 operator>>(basic_istream<_CharT, _Traits>& __is, _Setfill<_CharT> __f)
175 template<typename _CharT, typename _Traits>
176 inline basic_ostream<_CharT, _Traits>&
177 operator<<(basic_ostream<_CharT, _Traits>& __os, _Setfill<_CharT> __f)
184 struct _Setprecision { int _M_n; };
187 * @brief Manipulator for @c precision.
188 * @param __n The new precision.
190 * Sent to a stream object, this manipulator calls @c precision(__n) for
194 setprecision(int __n)
197 template<typename _CharT, typename _Traits>
198 inline basic_istream<_CharT, _Traits>&
199 operator>>(basic_istream<_CharT, _Traits>& __is, _Setprecision __f)
201 __is.precision(__f._M_n);
205 template<typename _CharT, typename _Traits>
206 inline basic_ostream<_CharT, _Traits>&
207 operator<<(basic_ostream<_CharT, _Traits>& __os, _Setprecision __f)
209 __os.precision(__f._M_n);
214 struct _Setw { int _M_n; };
217 * @brief Manipulator for @c width.
218 * @param __n The new width.
220 * Sent to a stream object, this manipulator calls @c width(__n) for
227 template<typename _CharT, typename _Traits>
228 inline basic_istream<_CharT, _Traits>&
229 operator>>(basic_istream<_CharT, _Traits>& __is, _Setw __f)
231 __is.width(__f._M_n);
235 template<typename _CharT, typename _Traits>
236 inline basic_ostream<_CharT, _Traits>&
237 operator<<(basic_ostream<_CharT, _Traits>& __os, _Setw __f)
239 __os.width(__f._M_n);
243 #ifdef __GXX_EXPERIMENTAL_CXX0X__
245 template<typename _MoneyT>
246 struct _Get_money { _MoneyT& _M_mon; bool _M_intl; };
249 * @brief Extended manipulator for extracting money.
250 * @param __mon Either long double or a specialization of @c basic_string.
251 * @param __intl A bool indicating whether international format
254 * Sent to a stream object, this manipulator extracts @a __mon.
256 template<typename _MoneyT>
257 inline _Get_money<_MoneyT>
258 get_money(_MoneyT& __mon, bool __intl = false)
259 { return { __mon, __intl }; }
261 template<typename _CharT, typename _Traits, typename _MoneyT>
262 basic_istream<_CharT, _Traits>&
263 operator>>(basic_istream<_CharT, _Traits>& __is, _Get_money<_MoneyT> __f)
265 typename basic_istream<_CharT, _Traits>::sentry __cerb(__is, false);
268 ios_base::iostate __err = ios_base::goodbit;
271 typedef istreambuf_iterator<_CharT, _Traits> _Iter;
272 typedef money_get<_CharT, _Iter> _MoneyGet;
274 const _MoneyGet& __mg = use_facet<_MoneyGet>(__is.getloc());
275 __mg.get(_Iter(__is.rdbuf()), _Iter(), __f._M_intl,
276 __is, __err, __f._M_mon);
278 __catch(__cxxabiv1::__forced_unwind&)
280 __is._M_setstate(ios_base::badbit);
281 __throw_exception_again;
284 { __is._M_setstate(ios_base::badbit); }
286 __is.setstate(__err);
292 template<typename _MoneyT>
293 struct _Put_money { const _MoneyT& _M_mon; bool _M_intl; };
296 * @brief Extended manipulator for inserting money.
297 * @param __mon Either long double or a specialization of @c basic_string.
298 * @param __intl A bool indicating whether international format
301 * Sent to a stream object, this manipulator inserts @a __mon.
303 template<typename _MoneyT>
304 inline _Put_money<_MoneyT>
305 put_money(const _MoneyT& __mon, bool __intl = false)
306 { return { __mon, __intl }; }
308 template<typename _CharT, typename _Traits, typename _MoneyT>
309 basic_ostream<_CharT, _Traits>&
310 operator<<(basic_ostream<_CharT, _Traits>& __os, _Put_money<_MoneyT> __f)
312 typename basic_ostream<_CharT, _Traits>::sentry __cerb(__os);
315 ios_base::iostate __err = ios_base::goodbit;
318 typedef ostreambuf_iterator<_CharT, _Traits> _Iter;
319 typedef money_put<_CharT, _Iter> _MoneyPut;
321 const _MoneyPut& __mp = use_facet<_MoneyPut>(__os.getloc());
322 if (__mp.put(_Iter(__os.rdbuf()), __f._M_intl, __os,
323 __os.fill(), __f._M_mon).failed())
324 __err |= ios_base::badbit;
326 __catch(__cxxabiv1::__forced_unwind&)
328 __os._M_setstate(ios_base::badbit);
329 __throw_exception_again;
332 { __os._M_setstate(ios_base::badbit); }
334 __os.setstate(__err);
341 // Inhibit implicit instantiations for required instantiations,
342 // which are defined via explicit instantiations elsewhere.
343 // NB: This syntax is a GNU extension.
344 #if _GLIBCXX_EXTERN_TEMPLATE
345 extern template ostream& operator<<(ostream&, _Setfill<char>);
346 extern template ostream& operator<<(ostream&, _Setiosflags);
347 extern template ostream& operator<<(ostream&, _Resetiosflags);
348 extern template ostream& operator<<(ostream&, _Setbase);
349 extern template ostream& operator<<(ostream&, _Setprecision);
350 extern template ostream& operator<<(ostream&, _Setw);
351 extern template istream& operator>>(istream&, _Setfill<char>);
352 extern template istream& operator>>(istream&, _Setiosflags);
353 extern template istream& operator>>(istream&, _Resetiosflags);
354 extern template istream& operator>>(istream&, _Setbase);
355 extern template istream& operator>>(istream&, _Setprecision);
356 extern template istream& operator>>(istream&, _Setw);
358 #ifdef _GLIBCXX_USE_WCHAR_T
359 extern template wostream& operator<<(wostream&, _Setfill<wchar_t>);
360 extern template wostream& operator<<(wostream&, _Setiosflags);
361 extern template wostream& operator<<(wostream&, _Resetiosflags);
362 extern template wostream& operator<<(wostream&, _Setbase);
363 extern template wostream& operator<<(wostream&, _Setprecision);
364 extern template wostream& operator<<(wostream&, _Setw);
365 extern template wistream& operator>>(wistream&, _Setfill<wchar_t>);
366 extern template wistream& operator>>(wistream&, _Setiosflags);
367 extern template wistream& operator>>(wistream&, _Resetiosflags);
368 extern template wistream& operator>>(wistream&, _Setbase);
369 extern template wistream& operator>>(wistream&, _Setprecision);
370 extern template wistream& operator>>(wistream&, _Setw);
374 _GLIBCXX_END_NAMESPACE_VERSION
377 #endif /* _GLIBCXX_IOMANIP */