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The C and C++ Include Header Files
/usr/include/c++/13/iomanip
$ cat -n /usr/include/c++/13/iomanip 1 // Standard stream manipulators -*- C++ -*- 2 3 // Copyright (C) 1997-2023 Free Software Foundation, Inc. 4 // 5 // This file is part of the GNU ISO C++ Library. This library is free 6 // software; you can redistribute it and/or modify it under the 7 // terms of the GNU General Public License as published by the 8 // Free Software Foundation; either version 3, or (at your option) 9 // any later version. 10 11 // This library is distributed in the hope that it will be useful, 12 // but WITHOUT ANY WARRANTY; without even the implied warranty of 13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 // GNU General Public License for more details. 15 16 // Under Section 7 of GPL version 3, you are granted additional 17 // permissions described in the GCC Runtime Library Exception, version 18 // 3.1, as published by the Free Software Foundation. 19 20 // You should have received a copy of the GNU General Public License and 21 // a copy of the GCC Runtime Library Exception along with this program; 22 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 23 // <http://www.gnu.org/licenses/>. 24 25 /** @file include/iomanip 26 * This is a Standard C++ Library header. 27 */ 28 29 // 30 // ISO C++ 14882: 27.6.3 Standard manipulators 31 // 32 33 #ifndef _GLIBCXX_IOMANIP 34 #define _GLIBCXX_IOMANIP 1 35 36 #pragma GCC system_header 37 38 #include <bits/requires_hosted.h> // iostreams 39 40 #include <bits/c++config.h> 41 #include <iosfwd> 42 #include <bits/ios_base.h> 43 44 #if __cplusplus >= 201103L 45 #include <locale> 46 #if __cplusplus > 201103L 47 #include <bits/quoted_string.h> 48 #endif 49 #endif 50 51 namespace std _GLIBCXX_VISIBILITY(default) 52 { 53 _GLIBCXX_BEGIN_NAMESPACE_VERSION 54 55 // [27.6.3] standard manipulators 56 // Also see DR 183. 57 58 struct _Resetiosflags { ios_base::fmtflags _M_mask; }; 59 60 /** 61 * @brief Manipulator for @c setf. 62 * @param __mask A format flags mask. 63 * 64 * Sent to a stream object, this manipulator resets the specified flags, 65 * via @e stream.setf(0,__mask). 66 */ 67 inline _Resetiosflags 68 resetiosflags(ios_base::fmtflags __mask) 69 { return { __mask }; } 70 71 template<typename _CharT, typename _Traits> 72 inline basic_istream<_CharT, _Traits>& 73 operator>>(basic_istream<_CharT, _Traits>& __is, _Resetiosflags __f) 74 { 75 __is.setf(ios_base::fmtflags(0), __f._M_mask); 76 return __is; 77 } 78 79 template<typename _CharT, typename _Traits> 80 inline basic_ostream<_CharT, _Traits>& 81 operator<<(basic_ostream<_CharT, _Traits>& __os, _Resetiosflags __f) 82 { 83 __os.setf(ios_base::fmtflags(0), __f._M_mask); 84 return __os; 85 } 86 87 88 struct _Setiosflags { ios_base::fmtflags _M_mask; }; 89 90 /** 91 * @brief Manipulator for @c setf. 92 * @param __mask A format flags mask. 93 * 94 * Sent to a stream object, this manipulator sets the format flags 95 * to @a __mask. 96 */ 97 inline _Setiosflags 98 setiosflags(ios_base::fmtflags __mask) 99 { return { __mask }; } 100 101 template<typename _CharT, typename _Traits> 102 inline basic_istream<_CharT, _Traits>& 103 operator>>(basic_istream<_CharT, _Traits>& __is, _Setiosflags __f) 104 { 105 __is.setf(__f._M_mask); 106 return __is; 107 } 108 109 template<typename _CharT, typename _Traits> 110 inline basic_ostream<_CharT, _Traits>& 111 operator<<(basic_ostream<_CharT, _Traits>& __os, _Setiosflags __f) 112 { 113 __os.setf(__f._M_mask); 114 return __os; 115 } 116 117 118 struct _Setbase { int _M_base; }; 119 120 /** 121 * @brief Manipulator for @c setf. 122 * @param __base A numeric base. 123 * 124 * Sent to a stream object, this manipulator changes the 125 * @c ios_base::basefield flags to @c oct, @c dec, or @c hex when @a base 126 * is 8, 10, or 16, accordingly, and to 0 if @a __base is any other value. 127 */ 128 inline _Setbase 129 setbase(int __base) 130 { return { __base }; } 131 132 template<typename _CharT, typename _Traits> 133 inline basic_istream<_CharT, _Traits>& 134 operator>>(basic_istream<_CharT, _Traits>& __is, _Setbase __f) 135 { 136 __is.setf(__f._M_base == 8 ? ios_base::oct : 137 __f._M_base == 10 ? ios_base::dec : 138 __f._M_base == 16 ? ios_base::hex : 139 ios_base::fmtflags(0), ios_base::basefield); 140 return __is; 141 } 142 143 template<typename _CharT, typename _Traits> 144 inline basic_ostream<_CharT, _Traits>& 145 operator<<(basic_ostream<_CharT, _Traits>& __os, _Setbase __f) 146 { 147 __os.setf(__f._M_base == 8 ? ios_base::oct : 148 __f._M_base == 10 ? ios_base::dec : 149 __f._M_base == 16 ? ios_base::hex : 150 ios_base::fmtflags(0), ios_base::basefield); 151 return __os; 152 } 153 154 155 template<typename _CharT> 156 struct _Setfill { _CharT _M_c; }; 157 158 /** 159 * @brief Manipulator for @c fill. 160 * @param __c The new fill character. 161 * 162 * Sent to a stream object, this manipulator calls @c fill(__c) for that 163 * object. 164 */ 165 template<typename _CharT> 166 inline _Setfill<_CharT> 167 setfill(_CharT __c) 168 { return { __c }; } 169 170 template<typename _CharT, typename _Traits> 171 inline basic_istream<_CharT, _Traits>& 172 operator>>(basic_istream<_CharT, _Traits>& __is, _Setfill<_CharT> __f) 173 { 174 __is.fill(__f._M_c); 175 return __is; 176 } 177 178 template<typename _CharT, typename _Traits> 179 inline basic_ostream<_CharT, _Traits>& 180 operator<<(basic_ostream<_CharT, _Traits>& __os, _Setfill<_CharT> __f) 181 { 182 __os.fill(__f._M_c); 183 return __os; 184 } 185 186 187 struct _Setprecision { int _M_n; }; 188 189 /** 190 * @brief Manipulator for @c precision. 191 * @param __n The new precision. 192 * 193 * Sent to a stream object, this manipulator calls @c precision(__n) for 194 * that object. 195 */ 196 inline _Setprecision 197 setprecision(int __n) 198 { return { __n }; } 199 200 template<typename _CharT, typename _Traits> 201 inline basic_istream<_CharT, _Traits>& 202 operator>>(basic_istream<_CharT, _Traits>& __is, _Setprecision __f) 203 { 204 __is.precision(__f._M_n); 205 return __is; 206 } 207 208 template<typename _CharT, typename _Traits> 209 inline basic_ostream<_CharT, _Traits>& 210 operator<<(basic_ostream<_CharT, _Traits>& __os, _Setprecision __f) 211 { 212 __os.precision(__f._M_n); 213 return __os; 214 } 215 216 217 struct _Setw { int _M_n; }; 218 219 /** 220 * @brief Manipulator for @c width. 221 * @param __n The new width. 222 * 223 * Sent to a stream object, this manipulator calls @c width(__n) for 224 * that object. 225 */ 226 inline _Setw 227 setw(int __n) 228 { return { __n }; } 229 230 template<typename _CharT, typename _Traits> 231 inline basic_istream<_CharT, _Traits>& 232 operator>>(basic_istream<_CharT, _Traits>& __is, _Setw __f) 233 { 234 __is.width(__f._M_n); 235 return __is; 236 } 237 238 template<typename _CharT, typename _Traits> 239 inline basic_ostream<_CharT, _Traits>& 240 operator<<(basic_ostream<_CharT, _Traits>& __os, _Setw __f) 241 { 242 __os.width(__f._M_n); 243 return __os; 244 } 245 246 #if __cplusplus >= 201103L 247 248 template<typename _MoneyT> 249 struct _Get_money { _MoneyT& _M_mon; bool _M_intl; }; 250 251 /** 252 * @brief Extended manipulator for extracting money. 253 * @param __mon Either long double or a specialization of @c basic_string. 254 * @param __intl A bool indicating whether international format 255 * is to be used. 256 * 257 * Sent to a stream object, this manipulator extracts @a __mon. 258 */ 259 template<typename _MoneyT> 260 inline _Get_money<_MoneyT> 261 get_money(_MoneyT& __mon, bool __intl = false) 262 { return { __mon, __intl }; } 263 264 template<typename _CharT, typename _Traits, typename _MoneyT> 265 basic_istream<_CharT, _Traits>& 266 operator>>(basic_istream<_CharT, _Traits>& __is, _Get_money<_MoneyT> __f) 267 { 268 typename basic_istream<_CharT, _Traits>::sentry __cerb(__is, false); 269 if (__cerb) 270 { 271 ios_base::iostate __err = ios_base::goodbit; 272 __try 273 { 274 typedef istreambuf_iterator<_CharT, _Traits> _Iter; 275 typedef money_get<_CharT, _Iter> _MoneyGet; 276 277 const _MoneyGet& __mg = use_facet<_MoneyGet>(__is.getloc()); 278 __mg.get(_Iter(__is.rdbuf()), _Iter(), __f._M_intl, 279 __is, __err, __f._M_mon); 280 } 281 __catch(__cxxabiv1::__forced_unwind&) 282 { 283 __is._M_setstate(ios_base::badbit); 284 __throw_exception_again; 285 } 286 __catch(...) 287 { __is._M_setstate(ios_base::badbit); } 288 if (__err) 289 __is.setstate(__err); 290 } 291 return __is; 292 } 293 294 295 template<typename _MoneyT> 296 struct _Put_money { const _MoneyT& _M_mon; bool _M_intl; }; 297 298 /** 299 * @brief Extended manipulator for inserting money. 300 * @param __mon Either long double or a specialization of @c basic_string. 301 * @param __intl A bool indicating whether international format 302 * is to be used. 303 * 304 * Sent to a stream object, this manipulator inserts @a __mon. 305 */ 306 template<typename _MoneyT> 307 inline _Put_money<_MoneyT> 308 put_money(const _MoneyT& __mon, bool __intl = false) 309 { return { __mon, __intl }; } 310 311 template<typename _CharT, typename _Traits, typename _MoneyT> 312 basic_ostream<_CharT, _Traits>& 313 operator<<(basic_ostream<_CharT, _Traits>& __os, _Put_money<_MoneyT> __f) 314 { 315 typename basic_ostream<_CharT, _Traits>::sentry __cerb(__os); 316 if (__cerb) 317 { 318 ios_base::iostate __err = ios_base::goodbit; 319 __try 320 { 321 typedef ostreambuf_iterator<_CharT, _Traits> _Iter; 322 typedef money_put<_CharT, _Iter> _MoneyPut; 323 324 const _MoneyPut& __mp = use_facet<_MoneyPut>(__os.getloc()); 325 if (__mp.put(_Iter(__os.rdbuf()), __f._M_intl, __os, 326 __os.fill(), __f._M_mon).failed()) 327 __err |= ios_base::badbit; 328 } 329 __catch(__cxxabiv1::__forced_unwind&) 330 { 331 __os._M_setstate(ios_base::badbit); 332 __throw_exception_again; 333 } 334 __catch(...) 335 { __os._M_setstate(ios_base::badbit); } 336 if (__err) 337 __os.setstate(__err); 338 } 339 return __os; 340 } 341 342 template<typename _CharT> 343 struct _Put_time 344 { 345 const std::tm* _M_tmb; 346 const _CharT* _M_fmt; 347 }; 348 349 /** 350 * @brief Extended manipulator for formatting time. 351 * 352 * This manipulator uses time_put::put to format time. 353 * [ext.manip] 354 * 355 * @param __tmb struct tm time data to format. 356 * @param __fmt format string. 357 */ 358 template<typename _CharT> 359 inline _Put_time<_CharT> 360 put_time(const std::tm* __tmb, const _CharT* __fmt) 361 { return { __tmb, __fmt }; } 362 363 template<typename _CharT, typename _Traits> 364 basic_ostream<_CharT, _Traits>& 365 operator<<(basic_ostream<_CharT, _Traits>& __os, _Put_time<_CharT> __f) 366 { 367 typename basic_ostream<_CharT, _Traits>::sentry __cerb(__os); 368 if (__cerb) 369 { 370 ios_base::iostate __err = ios_base::goodbit; 371 __try 372 { 373 typedef ostreambuf_iterator<_CharT, _Traits> _Iter; 374 typedef time_put<_CharT, _Iter> _TimePut; 375 376 const _CharT* const __fmt_end = __f._M_fmt + 377 _Traits::length(__f._M_fmt); 378 379 const _TimePut& __mp = use_facet<_TimePut>(__os.getloc()); 380 if (__mp.put(_Iter(__os.rdbuf()), __os, __os.fill(), 381 __f._M_tmb, __f._M_fmt, __fmt_end).failed()) 382 __err |= ios_base::badbit; 383 } 384 __catch(__cxxabiv1::__forced_unwind&) 385 { 386 __os._M_setstate(ios_base::badbit); 387 __throw_exception_again; 388 } 389 __catch(...) 390 { __os._M_setstate(ios_base::badbit); } 391 if (__err) 392 __os.setstate(__err); 393 } 394 return __os; 395 } 396 397 template<typename _CharT> 398 struct _Get_time 399 { 400 std::tm* _M_tmb; 401 const _CharT* _M_fmt; 402 }; 403 404 /** 405 * @brief Extended manipulator for extracting time. 406 * 407 * This manipulator uses time_get::get to extract time. 408 * [ext.manip] 409 * 410 * @param __tmb struct to extract the time data to. 411 * @param __fmt format string. 412 */ 413 template<typename _CharT> 414 inline _Get_time<_CharT> 415 get_time(std::tm* __tmb, const _CharT* __fmt) 416 { return { __tmb, __fmt }; } 417 418 template<typename _CharT, typename _Traits> 419 basic_istream<_CharT, _Traits>& 420 operator>>(basic_istream<_CharT, _Traits>& __is, _Get_time<_CharT> __f) 421 { 422 typename basic_istream<_CharT, _Traits>::sentry __cerb(__is, false); 423 if (__cerb) 424 { 425 ios_base::iostate __err = ios_base::goodbit; 426 __try 427 { 428 typedef istreambuf_iterator<_CharT, _Traits> _Iter; 429 typedef time_get<_CharT, _Iter> _TimeGet; 430 431 const _CharT* const __fmt_end = __f._M_fmt + 432 _Traits::length(__f._M_fmt); 433 434 const _TimeGet& __mg = use_facet<_TimeGet>(__is.getloc()); 435 __mg.get(_Iter(__is.rdbuf()), _Iter(), __is, 436 __err, __f._M_tmb, __f._M_fmt, __fmt_end); 437 } 438 __catch(__cxxabiv1::__forced_unwind&) 439 { 440 __is._M_setstate(ios_base::badbit); 441 __throw_exception_again; 442 } 443 __catch(...) 444 { __is._M_setstate(ios_base::badbit); } 445 if (__err) 446 __is.setstate(__err); 447 } 448 return __is; 449 } 450 451 #if __cplusplus >= 201402L 452 453 #define __cpp_lib_quoted_string_io 201304L 454 455 /** 456 * @brief Manipulator for quoted strings. 457 * @param __string String to quote. 458 * @param __delim Character to quote string with. 459 * @param __escape Escape character to escape itself or quote character. 460 * @since C++14 461 */ 462 template<typename _CharT> 463 inline auto 464 quoted(const _CharT* __string, 465 _CharT __delim = _CharT('"'), _CharT __escape = _CharT('\\')) 466 { 467 return __detail::_Quoted_string<const _CharT*, _CharT>(__string, __delim, 468 __escape); 469 } 470 471 template<typename _CharT, typename _Traits, typename _Alloc> 472 inline auto 473 quoted(const basic_string<_CharT, _Traits, _Alloc>& __string, 474 _CharT __delim = _CharT('"'), _CharT __escape = _CharT('\\')) 475 { 476 return __detail::_Quoted_string< 477 const basic_string<_CharT, _Traits, _Alloc>&, _CharT>( 478 __string, __delim, __escape); 479 } 480 481 template<typename _CharT, typename _Traits, typename _Alloc> 482 inline auto 483 quoted(basic_string<_CharT, _Traits, _Alloc>& __string, 484 _CharT __delim = _CharT('"'), _CharT __escape = _CharT('\\')) 485 { 486 return __detail::_Quoted_string< 487 basic_string<_CharT, _Traits, _Alloc>&, _CharT>( 488 __string, __delim, __escape); 489 } 490 491 #if __cplusplus >= 201703L 492 // _GLIBCXX_RESOLVE_LIB_DEFECTS 493 // 2785. quoted should work with basic_string_view 494 template<typename _CharT, typename _Traits> 495 inline auto 496 quoted(basic_string_view<_CharT, _Traits> __sv, 497 _CharT __delim = _CharT('"'), _CharT __escape = _CharT('\\')) 498 { 499 return __detail::_Quoted_string< 500 basic_string_view<_CharT, _Traits>, _CharT>(__sv, __delim, __escape); 501 } 502 #endif // C++17 503 #endif // C++14 504 505 #endif // __cplusplus >= 201103L 506 507 // Inhibit implicit instantiations for required instantiations, 508 // which are defined via explicit instantiations elsewhere. 509 // NB: This syntax is a GNU extension. 510 #if _GLIBCXX_EXTERN_TEMPLATE 511 extern template ostream& operator<<(ostream&, _Setfill<char>); 512 extern template ostream& operator<<(ostream&, _Setiosflags); 513 extern template ostream& operator<<(ostream&, _Resetiosflags); 514 extern template ostream& operator<<(ostream&, _Setbase); 515 extern template ostream& operator<<(ostream&, _Setprecision); 516 extern template ostream& operator<<(ostream&, _Setw); 517 extern template istream& operator>>(istream&, _Setfill<char>); 518 extern template istream& operator>>(istream&, _Setiosflags); 519 extern template istream& operator>>(istream&, _Resetiosflags); 520 extern template istream& operator>>(istream&, _Setbase); 521 extern template istream& operator>>(istream&, _Setprecision); 522 extern template istream& operator>>(istream&, _Setw); 523 524 #ifdef _GLIBCXX_USE_WCHAR_T 525 extern template wostream& operator<<(wostream&, _Setfill<wchar_t>); 526 extern template wostream& operator<<(wostream&, _Setiosflags); 527 extern template wostream& operator<<(wostream&, _Resetiosflags); 528 extern template wostream& operator<<(wostream&, _Setbase); 529 extern template wostream& operator<<(wostream&, _Setprecision); 530 extern template wostream& operator<<(wostream&, _Setw); 531 extern template wistream& operator>>(wistream&, _Setfill<wchar_t>); 532 extern template wistream& operator>>(wistream&, _Setiosflags); 533 extern template wistream& operator>>(wistream&, _Resetiosflags); 534 extern template wistream& operator>>(wistream&, _Setbase); 535 extern template wistream& operator>>(wistream&, _Setprecision); 536 extern template wistream& operator>>(wistream&, _Setw); 537 #endif 538 #endif 539 540 _GLIBCXX_END_NAMESPACE_VERSION 541 } // namespace 542 543 #endif /* _GLIBCXX_IOMANIP */
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