1 // class template regex -*- C++ -*- 2 3 // Copyright (C) 2010-2016 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 /** 26 * @file bits/regex.h 27 * This is an internal header file, included by other library headers. 28 * Do not attempt to use it directly. @headername{regex} 29 */ 30 31 namespace std _GLIBCXX_VISIBILITY(default) 32 { 33 _GLIBCXX_BEGIN_NAMESPACE_VERSION 34 _GLIBCXX_BEGIN_NAMESPACE_CXX11 35 template<typename, typename> 36 class basic_regex; 37 38 template<typename, typename> 39 class match_results; 40 41 _GLIBCXX_END_NAMESPACE_CXX11 42 _GLIBCXX_END_NAMESPACE_VERSION 43 44 namespace __detail 45 { 46 _GLIBCXX_BEGIN_NAMESPACE_VERSION 47 48 enum class _RegexExecutorPolicy : int 49 { _S_auto, _S_alternate }; 50 51 template<typename _BiIter, typename _Alloc, 52 typename _CharT, typename _TraitsT, 53 _RegexExecutorPolicy __policy, 54 bool __match_mode> 55 bool 56 __regex_algo_impl(_BiIter __s, 57 _BiIter __e, 58 match_results<_BiIter, _Alloc>& __m, 59 const basic_regex<_CharT, _TraitsT>& __re, 60 regex_constants::match_flag_type __flags); 61 62 template<typename, typename, typename, bool> 63 class _Executor; 64 65 _GLIBCXX_END_NAMESPACE_VERSION 66 } 67 68 _GLIBCXX_BEGIN_NAMESPACE_VERSION 69 _GLIBCXX_BEGIN_NAMESPACE_CXX11 70 71 /** 72 * @addtogroup regex 73 * @{ 74 */ 75 76 /** 77 * @brief Describes aspects of a regular expression. 78 * 79 * A regular expression traits class that satisfies the requirements of 80 * section [28.7]. 81 * 82 * The class %regex is parameterized around a set of related types and 83 * functions used to complete the definition of its semantics. This class 84 * satisfies the requirements of such a traits class. 85 */ 86 template<typename _Ch_type> 87 struct regex_traits 88 { 89 public: 90 typedef _Ch_type char_type; 91 typedef std::basic_string<char_type> string_type; 92 typedef std::locale locale_type; 93 private: 94 struct _RegexMask 95 { 96 typedef std::ctype_base::mask _BaseType; 97 _BaseType _M_base; 98 unsigned char _M_extended; 99 static constexpr unsigned char _S_under = 1 << 0; 100 static constexpr unsigned char _S_valid_mask = 0x1; 101 102 constexpr _RegexMask(_BaseType __base = 0, 103 unsigned char __extended = 0) 104 : _M_base(__base), _M_extended(__extended) 105 { } 106 107 constexpr _RegexMask 108 operator&(_RegexMask __other) const 109 { 110 return _RegexMask(_M_base & __other._M_base, 111 _M_extended & __other._M_extended); 112 } 113 114 constexpr _RegexMask 115 operator|(_RegexMask __other) const 116 { 117 return _RegexMask(_M_base | __other._M_base, 118 _M_extended | __other._M_extended); 119 } 120 121 constexpr _RegexMask 122 operator^(_RegexMask __other) const 123 { 124 return _RegexMask(_M_base ^ __other._M_base, 125 _M_extended ^ __other._M_extended); 126 } 127 128 constexpr _RegexMask 129 operator~() const 130 { return _RegexMask(~_M_base, ~_M_extended); } 131 132 _RegexMask& 133 operator&=(_RegexMask __other) 134 { return *this = (*this) & __other; } 135 136 _RegexMask& 137 operator|=(_RegexMask __other) 138 { return *this = (*this) | __other; } 139 140 _RegexMask& 141 operator^=(_RegexMask __other) 142 { return *this = (*this) ^ __other; } 143 144 constexpr bool 145 operator==(_RegexMask __other) const 146 { 147 return (_M_extended & _S_valid_mask) 148 == (__other._M_extended & _S_valid_mask) 149 && _M_base == __other._M_base; 150 } 151 152 constexpr bool 153 operator!=(_RegexMask __other) const 154 { return !((*this) == __other); } 155 156 }; 157 public: 158 typedef _RegexMask char_class_type; 159 160 public: 161 /** 162 * @brief Constructs a default traits object. 163 */ 164 regex_traits() { } 165 166 /** 167 * @brief Gives the length of a C-style string starting at @p __p. 168 * 169 * @param __p a pointer to the start of a character sequence. 170 * 171 * @returns the number of characters between @p *__p and the first 172 * default-initialized value of type @p char_type. In other words, uses 173 * the C-string algorithm for determining the length of a sequence of 174 * characters. 175 */ 176 static std::size_t 177 length(const char_type* __p) 178 { return string_type::traits_type::length(__p); } 179 180 /** 181 * @brief Performs the identity translation. 182 * 183 * @param __c A character to the locale-specific character set. 184 * 185 * @returns __c. 186 */ 187 char_type 188 translate(char_type __c) const 189 { return __c; } 190 191 /** 192 * @brief Translates a character into a case-insensitive equivalent. 193 * 194 * @param __c A character to the locale-specific character set. 195 * 196 * @returns the locale-specific lower-case equivalent of __c. 197 * @throws std::bad_cast if the imbued locale does not support the ctype 198 * facet. 199 */ 200 char_type 201 translate_nocase(char_type __c) const 202 { 203 typedef std::ctype<char_type> __ctype_type; 204 const __ctype_type& __fctyp(use_facet<__ctype_type>(_M_locale)); 205 return __fctyp.tolower(__c); 206 } 207 208 /** 209 * @brief Gets a sort key for a character sequence. 210 * 211 * @param __first beginning of the character sequence. 212 * @param __last one-past-the-end of the character sequence. 213 * 214 * Returns a sort key for the character sequence designated by the 215 * iterator range [F1, F2) such that if the character sequence [G1, G2) 216 * sorts before the character sequence [H1, H2) then 217 * v.transform(G1, G2) < v.transform(H1, H2). 218 * 219 * What this really does is provide a more efficient way to compare a 220 * string to multiple other strings in locales with fancy collation 221 * rules and equivalence classes. 222 * 223 * @returns a locale-specific sort key equivalent to the input range. 224 * 225 * @throws std::bad_cast if the current locale does not have a collate 226 * facet. 227 */ 228 template<typename _Fwd_iter> 229 string_type 230 transform(_Fwd_iter __first, _Fwd_iter __last) const 231 { 232 typedef std::collate<char_type> __collate_type; 233 const __collate_type& __fclt(use_facet<__collate_type>(_M_locale)); 234 string_type __s(__first, __last); 235 return __fclt.transform(__s.data(), __s.data() + __s.size()); 236 } 237 238 /** 239 * @brief Gets a sort key for a character sequence, independent of case. 240 * 241 * @param __first beginning of the character sequence. 242 * @param __last one-past-the-end of the character sequence. 243 * 244 * Effects: if typeid(use_facet<collate<_Ch_type> >) == 245 * typeid(collate_byname<_Ch_type>) and the form of the sort key 246 * returned by collate_byname<_Ch_type>::transform(__first, __last) 247 * is known and can be converted into a primary sort key 248 * then returns that key, otherwise returns an empty string. 249 * 250 * @todo Implement this function correctly. 251 */ 252 template<typename _Fwd_iter> 253 string_type 254 transform_primary(_Fwd_iter __first, _Fwd_iter __last) const 255 { 256 // TODO : this is not entirely correct. 257 // This function requires extra support from the platform. 258 // 259 // Read http://gcc.gnu.org/ml/libstdc++/2013-09/msg00117.html and 260 // http://www.open-std.org/Jtc1/sc22/wg21/docs/papers/2003/n1429.htm 261 // for details. 262 typedef std::ctype<char_type> __ctype_type; 263 const __ctype_type& __fctyp(use_facet<__ctype_type>(_M_locale)); 264 std::vector<char_type> __s(__first, __last); 265 __fctyp.tolower(__s.data(), __s.data() + __s.size()); 266 return this->transform(__s.data(), __s.data() + __s.size()); 267 } 268 269 /** 270 * @brief Gets a collation element by name. 271 * 272 * @param __first beginning of the collation element name. 273 * @param __last one-past-the-end of the collation element name. 274 * 275 * @returns a sequence of one or more characters that represents the 276 * collating element consisting of the character sequence designated by 277 * the iterator range [__first, __last). Returns an empty string if the 278 * character sequence is not a valid collating element. 279 */ 280 template<typename _Fwd_iter> 281 string_type 282 lookup_collatename(_Fwd_iter __first, _Fwd_iter __last) const; 283 284 /** 285 * @brief Maps one or more characters to a named character 286 * classification. 287 * 288 * @param __first beginning of the character sequence. 289 * @param __last one-past-the-end of the character sequence. 290 * @param __icase ignores the case of the classification name. 291 * 292 * @returns an unspecified value that represents the character 293 * classification named by the character sequence designated by 294 * the iterator range [__first, __last). If @p icase is true, 295 * the returned mask identifies the classification regardless of 296 * the case of the characters to be matched (for example, 297 * [[:lower:]] is the same as [[:alpha:]]), otherwise a 298 * case-dependent classification is returned. The value 299 * returned shall be independent of the case of the characters 300 * in the character sequence. If the name is not recognized then 301 * returns a value that compares equal to 0. 302 * 303 * At least the following names (or their wide-character equivalent) are 304 * supported. 305 * - d 306 * - w 307 * - s 308 * - alnum 309 * - alpha 310 * - blank 311 * - cntrl 312 * - digit 313 * - graph 314 * - lower 315 * - print 316 * - punct 317 * - space 318 * - upper 319 * - xdigit 320 */ 321 template<typename _Fwd_iter> 322 char_class_type 323 lookup_classname(_Fwd_iter __first, _Fwd_iter __last, 324 bool __icase = false) const; 325 326 /** 327 * @brief Determines if @p c is a member of an identified class. 328 * 329 * @param __c a character. 330 * @param __f a class type (as returned from lookup_classname). 331 * 332 * @returns true if the character @p __c is a member of the classification 333 * represented by @p __f, false otherwise. 334 * 335 * @throws std::bad_cast if the current locale does not have a ctype 336 * facet. 337 */ 338 bool 339 isctype(_Ch_type __c, char_class_type __f) const; 340 341 /** 342 * @brief Converts a digit to an int. 343 * 344 * @param __ch a character representing a digit. 345 * @param __radix the radix if the numeric conversion (limited to 8, 10, 346 * or 16). 347 * 348 * @returns the value represented by the digit __ch in base radix if the 349 * character __ch is a valid digit in base radix; otherwise returns -1. 350 */ 351 int 352 value(_Ch_type __ch, int __radix) const; 353 354 /** 355 * @brief Imbues the regex_traits object with a copy of a new locale. 356 * 357 * @param __loc A locale. 358 * 359 * @returns a copy of the previous locale in use by the regex_traits 360 * object. 361 * 362 * @note Calling imbue with a different locale than the one currently in 363 * use invalidates all cached data held by *this. 364 */ 365 locale_type 366 imbue(locale_type __loc) 367 { 368 std::swap(_M_locale, __loc); 369 return __loc; 370 } 371 372 /** 373 * @brief Gets a copy of the current locale in use by the regex_traits 374 * object. 375 */ 376 locale_type 377 getloc() const 378 { return _M_locale; } 379 380 protected: 381 locale_type _M_locale; 382 }; 383 384 // [7.8] Class basic_regex 385 /** 386 * Objects of specializations of this class represent regular expressions 387 * constructed from sequences of character type @p _Ch_type. 388 * 389 * Storage for the regular expression is allocated and deallocated as 390 * necessary by the member functions of this class. 391 */ 392 template<typename _Ch_type, typename _Rx_traits = regex_traits<_Ch_type>> 393 class basic_regex 394 { 395 public: 396 static_assert(is_same<_Ch_type, typename _Rx_traits::char_type>::value, 397 "regex traits class must have the same char_type"); 398 399 // types: 400 typedef _Ch_type value_type; 401 typedef _Rx_traits traits_type; 402 typedef typename traits_type::string_type string_type; 403 typedef regex_constants::syntax_option_type flag_type; 404 typedef typename traits_type::locale_type locale_type; 405 406 /** 407 * @name Constants 408 * std [28.8.1](1) 409 */ 410 //@{ 411 static constexpr flag_type icase = regex_constants::icase; 412 static constexpr flag_type nosubs = regex_constants::nosubs; 413 static constexpr flag_type optimize = regex_constants::optimize; 414 static constexpr flag_type collate = regex_constants::collate; 415 static constexpr flag_type ECMAScript = regex_constants::ECMAScript; 416 static constexpr flag_type basic = regex_constants::basic; 417 static constexpr flag_type extended = regex_constants::extended; 418 static constexpr flag_type awk = regex_constants::awk; 419 static constexpr flag_type grep = regex_constants::grep; 420 static constexpr flag_type egrep = regex_constants::egrep; 421 //@} 422 423 // [7.8.2] construct/copy/destroy 424 /** 425 * Constructs a basic regular expression that does not match any 426 * character sequence. 427 */ 428 basic_regex() 429 : _M_flags(ECMAScript), _M_loc(), _M_automaton(nullptr) 430 { } 431 432 /** 433 * @brief Constructs a basic regular expression from the 434 * sequence [__p, __p + char_traits<_Ch_type>::length(__p)) 435 * interpreted according to the flags in @p __f. 436 * 437 * @param __p A pointer to the start of a C-style null-terminated string 438 * containing a regular expression. 439 * @param __f Flags indicating the syntax rules and options. 440 * 441 * @throws regex_error if @p __p is not a valid regular expression. 442 */ 443 explicit 444 basic_regex(const _Ch_type* __p, flag_type __f = ECMAScript) 445 : basic_regex(__p, __p + char_traits<_Ch_type>::length(__p), __f) 446 { } 447 448 /** 449 * @brief Constructs a basic regular expression from the sequence 450 * [p, p + len) interpreted according to the flags in @p f. 451 * 452 * @param __p A pointer to the start of a string containing a regular 453 * expression. 454 * @param __len The length of the string containing the regular 455 * expression. 456 * @param __f Flags indicating the syntax rules and options. 457 * 458 * @throws regex_error if @p __p is not a valid regular expression. 459 */ 460 basic_regex(const _Ch_type* __p, std::size_t __len, 461 flag_type __f = ECMAScript) 462 : basic_regex(__p, __p + __len, __f) 463 { } 464 465 /** 466 * @brief Copy-constructs a basic regular expression. 467 * 468 * @param __rhs A @p regex object. 469 */ 470 basic_regex(const basic_regex& __rhs) = default; 471 472 /** 473 * @brief Move-constructs a basic regular expression. 474 * 475 * @param __rhs A @p regex object. 476 */ 477 basic_regex(basic_regex&& __rhs) noexcept = default; 478 479 /** 480 * @brief Constructs a basic regular expression from the string 481 * @p s interpreted according to the flags in @p f. 482 * 483 * @param __s A string containing a regular expression. 484 * @param __f Flags indicating the syntax rules and options. 485 * 486 * @throws regex_error if @p __s is not a valid regular expression. 487 */ 488 template<typename _Ch_traits, typename _Ch_alloc> 489 explicit 490 basic_regex(const std::basic_string<_Ch_type, _Ch_traits, 491 _Ch_alloc>& __s, 492 flag_type __f = ECMAScript) 493 : basic_regex(__s.data(), __s.data() + __s.size(), __f) 494 { } 495 496 /** 497 * @brief Constructs a basic regular expression from the range 498 * [first, last) interpreted according to the flags in @p f. 499 * 500 * @param __first The start of a range containing a valid regular 501 * expression. 502 * @param __last The end of a range containing a valid regular 503 * expression. 504 * @param __f The format flags of the regular expression. 505 * 506 * @throws regex_error if @p [__first, __last) is not a valid regular 507 * expression. 508 */ 509 template<typename _FwdIter> 510 basic_regex(_FwdIter __first, _FwdIter __last, 511 flag_type __f = ECMAScript) 512 : basic_regex(std::move(__first), std::move(__last), locale_type(), __f) 513 { } 514 515 /** 516 * @brief Constructs a basic regular expression from an initializer list. 517 * 518 * @param __l The initializer list. 519 * @param __f The format flags of the regular expression. 520 * 521 * @throws regex_error if @p __l is not a valid regular expression. 522 */ 523 basic_regex(initializer_list<_Ch_type> __l, flag_type __f = ECMAScript) 524 : basic_regex(__l.begin(), __l.end(), __f) 525 { } 526 527 /** 528 * @brief Destroys a basic regular expression. 529 */ 530 ~basic_regex() 531 { } 532 533 /** 534 * @brief Assigns one regular expression to another. 535 */ 536 basic_regex& 537 operator=(const basic_regex& __rhs) 538 { return this->assign(__rhs); } 539 540 /** 541 * @brief Move-assigns one regular expression to another. 542 */ 543 basic_regex& 544 operator=(basic_regex&& __rhs) noexcept 545 { return this->assign(std::move(__rhs)); } 546 547 /** 548 * @brief Replaces a regular expression with a new one constructed from 549 * a C-style null-terminated string. 550 * 551 * @param __p A pointer to the start of a null-terminated C-style string 552 * containing a regular expression. 553 */ 554 basic_regex& 555 operator=(const _Ch_type* __p) 556 { return this->assign(__p); } 557 558 /** 559 * @brief Replaces a regular expression with a new one constructed from 560 * an initializer list. 561 * 562 * @param __l The initializer list. 563 * 564 * @throws regex_error if @p __l is not a valid regular expression. 565 */ 566 basic_regex& 567 operator=(initializer_list<_Ch_type> __l) 568 { return this->assign(__l.begin(), __l.end()); } 569 570 /** 571 * @brief Replaces a regular expression with a new one constructed from 572 * a string. 573 * 574 * @param __s A pointer to a string containing a regular expression. 575 */ 576 template<typename _Ch_traits, typename _Alloc> 577 basic_regex& 578 operator=(const basic_string<_Ch_type, _Ch_traits, _Alloc>& __s) 579 { return this->assign(__s); } 580 581 // [7.8.3] assign 582 /** 583 * @brief the real assignment operator. 584 * 585 * @param __rhs Another regular expression object. 586 */ 587 basic_regex& 588 assign(const basic_regex& __rhs) 589 { 590 basic_regex __tmp(__rhs); 591 this->swap(__tmp); 592 return *this; 593 } 594 595 /** 596 * @brief The move-assignment operator. 597 * 598 * @param __rhs Another regular expression object. 599 */ 600 basic_regex& 601 assign(basic_regex&& __rhs) noexcept 602 { 603 basic_regex __tmp(std::move(__rhs)); 604 this->swap(__tmp); 605 return *this; 606 } 607 608 /** 609 * @brief Assigns a new regular expression to a regex object from a 610 * C-style null-terminated string containing a regular expression 611 * pattern. 612 * 613 * @param __p A pointer to a C-style null-terminated string containing 614 * a regular expression pattern. 615 * @param __flags Syntax option flags. 616 * 617 * @throws regex_error if __p does not contain a valid regular 618 * expression pattern interpreted according to @p __flags. If 619 * regex_error is thrown, *this remains unchanged. 620 */ 621 basic_regex& 622 assign(const _Ch_type* __p, flag_type __flags = ECMAScript) 623 { return this->assign(string_type(__p), __flags); } 624 625 /** 626 * @brief Assigns a new regular expression to a regex object from a 627 * C-style string containing a regular expression pattern. 628 * 629 * @param __p A pointer to a C-style string containing a 630 * regular expression pattern. 631 * @param __len The length of the regular expression pattern string. 632 * @param __flags Syntax option flags. 633 * 634 * @throws regex_error if p does not contain a valid regular 635 * expression pattern interpreted according to @p __flags. If 636 * regex_error is thrown, *this remains unchanged. 637 */ 638 basic_regex& 639 assign(const _Ch_type* __p, std::size_t __len, flag_type __flags) 640 { return this->assign(string_type(__p, __len), __flags); } 641 642 /** 643 * @brief Assigns a new regular expression to a regex object from a 644 * string containing a regular expression pattern. 645 * 646 * @param __s A string containing a regular expression pattern. 647 * @param __flags Syntax option flags. 648 * 649 * @throws regex_error if __s does not contain a valid regular 650 * expression pattern interpreted according to @p __flags. If 651 * regex_error is thrown, *this remains unchanged. 652 */ 653 template<typename _Ch_traits, typename _Alloc> 654 basic_regex& 655 assign(const basic_string<_Ch_type, _Ch_traits, _Alloc>& __s, 656 flag_type __flags = ECMAScript) 657 { 658 return this->assign(basic_regex(__s.data(), __s.data() + __s.size(), 659 _M_loc, __flags)); 660 } 661 662 /** 663 * @brief Assigns a new regular expression to a regex object. 664 * 665 * @param __first The start of a range containing a valid regular 666 * expression. 667 * @param __last The end of a range containing a valid regular 668 * expression. 669 * @param __flags Syntax option flags. 670 * 671 * @throws regex_error if p does not contain a valid regular 672 * expression pattern interpreted according to @p __flags. If 673 * regex_error is thrown, the object remains unchanged. 674 */ 675 template<typename _InputIterator> 676 basic_regex& 677 assign(_InputIterator __first, _InputIterator __last, 678 flag_type __flags = ECMAScript) 679 { return this->assign(string_type(__first, __last), __flags); } 680 681 /** 682 * @brief Assigns a new regular expression to a regex object. 683 * 684 * @param __l An initializer list representing a regular expression. 685 * @param __flags Syntax option flags. 686 * 687 * @throws regex_error if @p __l does not contain a valid 688 * regular expression pattern interpreted according to @p 689 * __flags. If regex_error is thrown, the object remains 690 * unchanged. 691 */ 692 basic_regex& 693 assign(initializer_list<_Ch_type> __l, flag_type __flags = ECMAScript) 694 { return this->assign(__l.begin(), __l.end(), __flags); } 695 696 // [7.8.4] const operations 697 /** 698 * @brief Gets the number of marked subexpressions within the regular 699 * expression. 700 */ 701 unsigned int 702 mark_count() const 703 { 704 if (_M_automaton) 705 return _M_automaton->_M_sub_count() - 1; 706 return 0; 707 } 708 709 /** 710 * @brief Gets the flags used to construct the regular expression 711 * or in the last call to assign(). 712 */ 713 flag_type 714 flags() const 715 { return _M_flags; } 716 717 // [7.8.5] locale 718 /** 719 * @brief Imbues the regular expression object with the given locale. 720 * 721 * @param __loc A locale. 722 */ 723 locale_type 724 imbue(locale_type __loc) 725 { 726 std::swap(__loc, _M_loc); 727 _M_automaton.reset(); 728 return __loc; 729 } 730 731 /** 732 * @brief Gets the locale currently imbued in the regular expression 733 * object. 734 */ 735 locale_type 736 getloc() const 737 { return _M_loc; } 738 739 // [7.8.6] swap 740 /** 741 * @brief Swaps the contents of two regular expression objects. 742 * 743 * @param __rhs Another regular expression object. 744 */ 745 void 746 swap(basic_regex& __rhs) 747 { 748 std::swap(_M_flags, __rhs._M_flags); 749 std::swap(_M_loc, __rhs._M_loc); 750 std::swap(_M_automaton, __rhs._M_automaton); 751 } 752 753 #ifdef _GLIBCXX_DEBUG 754 void 755 _M_dot(std::ostream& __ostr) 756 { _M_automaton->_M_dot(__ostr); } 757 #endif 758 759 private: 760 typedef std::shared_ptr<const __detail::_NFA<_Rx_traits>> _AutomatonPtr; 761 762 template<typename _FwdIter> 763 basic_regex(_FwdIter __first, _FwdIter __last, locale_type __loc, 764 flag_type __f) 765 : _M_flags(__f), _M_loc(std::move(__loc)), 766 _M_automaton(__detail::__compile_nfa<_FwdIter, _Rx_traits>( 767 std::move(__first), std::move(__last), _M_loc, _M_flags)) 768 { } 769 770 template<typename _Bp, typename _Ap, typename _Cp, typename _Rp, 771 __detail::_RegexExecutorPolicy, bool> 772 friend bool __detail:: 773 #if _GLIBCXX_INLINE_VERSION 774 __7:: // Required due to PR c++/59256 775 #endif 776 __regex_algo_impl(_Bp, _Bp, match_results<_Bp, _Ap>&, 777 const basic_regex<_Cp, _Rp>&, 778 regex_constants::match_flag_type); 779 780 template<typename, typename, typename, bool> 781 friend class __detail::_Executor; 782 783 flag_type _M_flags; 784 locale_type _M_loc; 785 _AutomatonPtr _M_automaton; 786 }; 787 788 template<typename _Ch, typename _Tr> 789 constexpr regex_constants::syntax_option_type 790 basic_regex<_Ch, _Tr>::icase; 791 792 template<typename _Ch, typename _Tr> 793 constexpr regex_constants::syntax_option_type 794 basic_regex<_Ch, _Tr>::nosubs; 795 796 template<typename _Ch, typename _Tr> 797 constexpr regex_constants::syntax_option_type 798 basic_regex<_Ch, _Tr>::optimize; 799 800 template<typename _Ch, typename _Tr> 801 constexpr regex_constants::syntax_option_type 802 basic_regex<_Ch, _Tr>::collate; 803 804 template<typename _Ch, typename _Tr> 805 constexpr regex_constants::syntax_option_type 806 basic_regex<_Ch, _Tr>::ECMAScript; 807 808 template<typename _Ch, typename _Tr> 809 constexpr regex_constants::syntax_option_type 810 basic_regex<_Ch, _Tr>::basic; 811 812 template<typename _Ch, typename _Tr> 813 constexpr regex_constants::syntax_option_type 814 basic_regex<_Ch, _Tr>::extended; 815 816 template<typename _Ch, typename _Tr> 817 constexpr regex_constants::syntax_option_type 818 basic_regex<_Ch, _Tr>::awk; 819 820 template<typename _Ch, typename _Tr> 821 constexpr regex_constants::syntax_option_type 822 basic_regex<_Ch, _Tr>::grep; 823 824 template<typename _Ch, typename _Tr> 825 constexpr regex_constants::syntax_option_type 826 basic_regex<_Ch, _Tr>::egrep; 827 828 /** @brief Standard regular expressions. */ 829 typedef basic_regex<char> regex; 830 831 #ifdef _GLIBCXX_USE_WCHAR_T 832 /** @brief Standard wide-character regular expressions. */ 833 typedef basic_regex<wchar_t> wregex; 834 #endif 835 836 837 // [7.8.6] basic_regex swap 838 /** 839 * @brief Swaps the contents of two regular expression objects. 840 * @param __lhs First regular expression. 841 * @param __rhs Second regular expression. 842 */ 843 template<typename _Ch_type, typename _Rx_traits> 844 inline void 845 swap(basic_regex<_Ch_type, _Rx_traits>& __lhs, 846 basic_regex<_Ch_type, _Rx_traits>& __rhs) 847 { __lhs.swap(__rhs); } 848 849 850 // [7.9] Class template sub_match 851 /** 852 * A sequence of characters matched by a particular marked sub-expression. 853 * 854 * An object of this class is essentially a pair of iterators marking a 855 * matched subexpression within a regular expression pattern match. Such 856 * objects can be converted to and compared with std::basic_string objects 857 * of a similar base character type as the pattern matched by the regular 858 * expression. 859 * 860 * The iterators that make up the pair are the usual half-open interval 861 * referencing the actual original pattern matched. 862 */ 863 template<typename _BiIter> 864 class sub_match : public std::pair<_BiIter, _BiIter> 865 { 866 typedef iterator_traits<_BiIter> __iter_traits; 867 868 public: 869 typedef typename __iter_traits::value_type value_type; 870 typedef typename __iter_traits::difference_type difference_type; 871 typedef _BiIter iterator; 872 typedef std::basic_string<value_type> string_type; 873 874 bool matched; 875 876 constexpr sub_match() : matched() { } 877 878 /** 879 * Gets the length of the matching sequence. 880 */ 881 difference_type 882 length() const 883 { return this->matched ? std::distance(this->first, this->second) : 0; } 884 885 /** 886 * @brief Gets the matching sequence as a string. 887 * 888 * @returns the matching sequence as a string. 889 * 890 * This is the implicit conversion operator. It is identical to the 891 * str() member function except that it will want to pop up in 892 * unexpected places and cause a great deal of confusion and cursing 893 * from the unwary. 894 */ 895 operator string_type() const 896 { 897 return this->matched 898 ? string_type(this->first, this->second) 899 : string_type(); 900 } 901 902 /** 903 * @brief Gets the matching sequence as a string. 904 * 905 * @returns the matching sequence as a string. 906 */ 907 string_type 908 str() const 909 { 910 return this->matched 911 ? string_type(this->first, this->second) 912 : string_type(); 913 } 914 915 /** 916 * @brief Compares this and another matched sequence. 917 * 918 * @param __s Another matched sequence to compare to this one. 919 * 920 * @retval <0 this matched sequence will collate before @p __s. 921 * @retval =0 this matched sequence is equivalent to @p __s. 922 * @retval <0 this matched sequence will collate after @p __s. 923 */ 924 int 925 compare(const sub_match& __s) const 926 { return this->str().compare(__s.str()); } 927 928 /** 929 * @brief Compares this sub_match to a string. 930 * 931 * @param __s A string to compare to this sub_match. 932 * 933 * @retval <0 this matched sequence will collate before @p __s. 934 * @retval =0 this matched sequence is equivalent to @p __s. 935 * @retval <0 this matched sequence will collate after @p __s. 936 */ 937 int 938 compare(const string_type& __s) const 939 { return this->str().compare(__s); } 940 941 /** 942 * @brief Compares this sub_match to a C-style string. 943 * 944 * @param __s A C-style string to compare to this sub_match. 945 * 946 * @retval <0 this matched sequence will collate before @p __s. 947 * @retval =0 this matched sequence is equivalent to @p __s. 948 * @retval <0 this matched sequence will collate after @p __s. 949 */ 950 int 951 compare(const value_type* __s) const 952 { return this->str().compare(__s); } 953 }; 954 955 956 /** @brief Standard regex submatch over a C-style null-terminated string. */ 957 typedef sub_match<const char*> csub_match; 958 959 /** @brief Standard regex submatch over a standard string. */ 960 typedef sub_match<string::const_iterator> ssub_match; 961 962 #ifdef _GLIBCXX_USE_WCHAR_T 963 /** @brief Regex submatch over a C-style null-terminated wide string. */ 964 typedef sub_match<const wchar_t*> wcsub_match; 965 966 /** @brief Regex submatch over a standard wide string. */ 967 typedef sub_match<wstring::const_iterator> wssub_match; 968 #endif 969 970 // [7.9.2] sub_match non-member operators 971 972 /** 973 * @brief Tests the equivalence of two regular expression submatches. 974 * @param __lhs First regular expression submatch. 975 * @param __rhs Second regular expression submatch. 976 * @returns true if @a __lhs is equivalent to @a __rhs, false otherwise. 977 */ 978 template<typename _BiIter> 979 inline bool 980 operator==(const sub_match<_BiIter>& __lhs, const sub_match<_BiIter>& __rhs) 981 { return __lhs.compare(__rhs) == 0; } 982 983 /** 984 * @brief Tests the inequivalence of two regular expression submatches. 985 * @param __lhs First regular expression submatch. 986 * @param __rhs Second regular expression submatch. 987 * @returns true if @a __lhs is not equivalent to @a __rhs, false otherwise. 988 */ 989 template<typename _BiIter> 990 inline bool 991 operator!=(const sub_match<_BiIter>& __lhs, const sub_match<_BiIter>& __rhs) 992 { return __lhs.compare(__rhs) != 0; } 993 994 /** 995 * @brief Tests the ordering of two regular expression submatches. 996 * @param __lhs First regular expression submatch. 997 * @param __rhs Second regular expression submatch. 998 * @returns true if @a __lhs precedes @a __rhs, false otherwise. 999 */ 1000 template<typename _BiIter> 1001 inline bool 1002 operator<(const sub_match<_BiIter>& __lhs, const sub_match<_BiIter>& __rhs) 1003 { return __lhs.compare(__rhs) < 0; } 1004 1005 /** 1006 * @brief Tests the ordering of two regular expression submatches. 1007 * @param __lhs First regular expression submatch. 1008 * @param __rhs Second regular expression submatch. 1009 * @returns true if @a __lhs does not succeed @a __rhs, false otherwise. 1010 */ 1011 template<typename _BiIter> 1012 inline bool 1013 operator<=(const sub_match<_BiIter>& __lhs, const sub_match<_BiIter>& __rhs) 1014 { return __lhs.compare(__rhs) <= 0; } 1015 1016 /** 1017 * @brief Tests the ordering of two regular expression submatches. 1018 * @param __lhs First regular expression submatch. 1019 * @param __rhs Second regular expression submatch. 1020 * @returns true if @a __lhs does not precede @a __rhs, false otherwise. 1021 */ 1022 template<typename _BiIter> 1023 inline bool 1024 operator>=(const sub_match<_BiIter>& __lhs, const sub_match<_BiIter>& __rhs) 1025 { return __lhs.compare(__rhs) >= 0; } 1026 1027 /** 1028 * @brief Tests the ordering of two regular expression submatches. 1029 * @param __lhs First regular expression submatch. 1030 * @param __rhs Second regular expression submatch. 1031 * @returns true if @a __lhs succeeds @a __rhs, false otherwise. 1032 */ 1033 template<typename _BiIter> 1034 inline bool 1035 operator>(const sub_match<_BiIter>& __lhs, const sub_match<_BiIter>& __rhs) 1036 { return __lhs.compare(__rhs) > 0; } 1037 1038 // Alias for sub_match'd string. 1039 template<typename _Bi_iter, typename _Ch_traits, typename _Ch_alloc> 1040 using __sub_match_string = basic_string< 1041 typename iterator_traits<_Bi_iter>::value_type, 1042 _Ch_traits, _Ch_alloc>; 1043 1044 /** 1045 * @brief Tests the equivalence of a string and a regular expression 1046 * submatch. 1047 * @param __lhs A string. 1048 * @param __rhs A regular expression submatch. 1049 * @returns true if @a __lhs is equivalent to @a __rhs, false otherwise. 1050 */ 1051 template<typename _Bi_iter, typename _Ch_traits, typename _Ch_alloc> 1052 inline bool 1053 operator==(const __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>& __lhs, 1054 const sub_match<_Bi_iter>& __rhs) 1055 { 1056 typedef typename sub_match<_Bi_iter>::string_type string_type; 1057 return __rhs.compare(string_type(__lhs.data(), __lhs.size())) == 0; 1058 } 1059 1060 /** 1061 * @brief Tests the inequivalence of a string and a regular expression 1062 * submatch. 1063 * @param __lhs A string. 1064 * @param __rhs A regular expression submatch. 1065 * @returns true if @a __lhs is not equivalent to @a __rhs, false otherwise. 1066 */ 1067 template<typename _Bi_iter, typename _Ch_traits, typename _Ch_alloc> 1068 inline bool 1069 operator!=(const __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>& __lhs, 1070 const sub_match<_Bi_iter>& __rhs) 1071 { return !(__lhs == __rhs); } 1072 1073 /** 1074 * @brief Tests the ordering of a string and a regular expression submatch. 1075 * @param __lhs A string. 1076 * @param __rhs A regular expression submatch. 1077 * @returns true if @a __lhs precedes @a __rhs, false otherwise. 1078 */ 1079 template<typename _Bi_iter, typename _Ch_traits, typename _Ch_alloc> 1080 inline bool 1081 operator<(const __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>& __lhs, 1082 const sub_match<_Bi_iter>& __rhs) 1083 { 1084 typedef typename sub_match<_Bi_iter>::string_type string_type; 1085 return __rhs.compare(string_type(__lhs.data(), __lhs.size())) > 0; 1086 } 1087 1088 /** 1089 * @brief Tests the ordering of a string and a regular expression submatch. 1090 * @param __lhs A string. 1091 * @param __rhs A regular expression submatch. 1092 * @returns true if @a __lhs succeeds @a __rhs, false otherwise. 1093 */ 1094 template<typename _Bi_iter, typename _Ch_traits, typename _Ch_alloc> 1095 inline bool 1096 operator>(const __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>& __lhs, 1097 const sub_match<_Bi_iter>& __rhs) 1098 { return __rhs < __lhs; } 1099 1100 /** 1101 * @brief Tests the ordering of a string and a regular expression submatch. 1102 * @param __lhs A string. 1103 * @param __rhs A regular expression submatch. 1104 * @returns true if @a __lhs does not precede @a __rhs, false otherwise. 1105 */ 1106 template<typename _Bi_iter, typename _Ch_traits, typename _Ch_alloc> 1107 inline bool 1108 operator>=(const __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>& __lhs, 1109 const sub_match<_Bi_iter>& __rhs) 1110 { return !(__lhs < __rhs); } 1111 1112 /** 1113 * @brief Tests the ordering of a string and a regular expression submatch. 1114 * @param __lhs A string. 1115 * @param __rhs A regular expression submatch. 1116 * @returns true if @a __lhs does not succeed @a __rhs, false otherwise. 1117 */ 1118 template<typename _Bi_iter, typename _Ch_traits, typename _Ch_alloc> 1119 inline bool 1120 operator<=(const __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>& __lhs, 1121 const sub_match<_Bi_iter>& __rhs) 1122 { return !(__rhs < __lhs); } 1123 1124 /** 1125 * @brief Tests the equivalence of a regular expression submatch and a 1126 * string. 1127 * @param __lhs A regular expression submatch. 1128 * @param __rhs A string. 1129 * @returns true if @a __lhs is equivalent to @a __rhs, false otherwise. 1130 */ 1131 template<typename _Bi_iter, typename _Ch_traits, typename _Ch_alloc> 1132 inline bool 1133 operator==(const sub_match<_Bi_iter>& __lhs, 1134 const __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>& __rhs) 1135 { 1136 typedef typename sub_match<_Bi_iter>::string_type string_type; 1137 return __lhs.compare(string_type(__rhs.data(), __rhs.size())) == 0; 1138 } 1139 1140 /** 1141 * @brief Tests the inequivalence of a regular expression submatch and a 1142 * string. 1143 * @param __lhs A regular expression submatch. 1144 * @param __rhs A string. 1145 * @returns true if @a __lhs is not equivalent to @a __rhs, false otherwise. 1146 */ 1147 template<typename _Bi_iter, typename _Ch_traits, typename _Ch_alloc> 1148 inline bool 1149 operator!=(const sub_match<_Bi_iter>& __lhs, 1150 const __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>& __rhs) 1151 { return !(__lhs == __rhs); } 1152 1153 /** 1154 * @brief Tests the ordering of a regular expression submatch and a string. 1155 * @param __lhs A regular expression submatch. 1156 * @param __rhs A string. 1157 * @returns true if @a __lhs precedes @a __rhs, false otherwise. 1158 */ 1159 template<typename _Bi_iter, class _Ch_traits, class _Ch_alloc> 1160 inline bool 1161 operator<(const sub_match<_Bi_iter>& __lhs, 1162 const __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>& __rhs) 1163 { 1164 typedef typename sub_match<_Bi_iter>::string_type string_type; 1165 return __lhs.compare(string_type(__rhs.data(), __rhs.size())) < 0; 1166 } 1167 1168 /** 1169 * @brief Tests the ordering of a regular expression submatch and a string. 1170 * @param __lhs A regular expression submatch. 1171 * @param __rhs A string. 1172 * @returns true if @a __lhs succeeds @a __rhs, false otherwise. 1173 */ 1174 template<typename _Bi_iter, class _Ch_traits, class _Ch_alloc> 1175 inline bool 1176 operator>(const sub_match<_Bi_iter>& __lhs, 1177 const __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>& __rhs) 1178 { return __rhs < __lhs; } 1179 1180 /** 1181 * @brief Tests the ordering of a regular expression submatch and a string. 1182 * @param __lhs A regular expression submatch. 1183 * @param __rhs A string. 1184 * @returns true if @a __lhs does not precede @a __rhs, false otherwise. 1185 */ 1186 template<typename _Bi_iter, class _Ch_traits, class _Ch_alloc> 1187 inline bool 1188 operator>=(const sub_match<_Bi_iter>& __lhs, 1189 const __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>& __rhs) 1190 { return !(__lhs < __rhs); } 1191 1192 /** 1193 * @brief Tests the ordering of a regular expression submatch and a string. 1194 * @param __lhs A regular expression submatch. 1195 * @param __rhs A string. 1196 * @returns true if @a __lhs does not succeed @a __rhs, false otherwise. 1197 */ 1198 template<typename _Bi_iter, class _Ch_traits, class _Ch_alloc> 1199 inline bool 1200 operator<=(const sub_match<_Bi_iter>& __lhs, 1201 const __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>& __rhs) 1202 { return !(__rhs < __lhs); } 1203 1204 /** 1205 * @brief Tests the equivalence of a C string and a regular expression 1206 * submatch. 1207 * @param __lhs A C string. 1208 * @param __rhs A regular expression submatch. 1209 * @returns true if @a __lhs is equivalent to @a __rhs, false otherwise. 1210 */ 1211 template<typename _Bi_iter> 1212 inline bool 1213 operator==(typename iterator_traits<_Bi_iter>::value_type const* __lhs, 1214 const sub_match<_Bi_iter>& __rhs) 1215 { return __rhs.compare(__lhs) == 0; } 1216 1217 /** 1218 * @brief Tests the inequivalence of an iterator value and a regular 1219 * expression submatch. 1220 * @param __lhs A regular expression submatch. 1221 * @param __rhs A string. 1222 * @returns true if @a __lhs is not equivalent to @a __rhs, false otherwise. 1223 */ 1224 template<typename _Bi_iter> 1225 inline bool 1226 operator!=(typename iterator_traits<_Bi_iter>::value_type const* __lhs, 1227 const sub_match<_Bi_iter>& __rhs) 1228 { return !(__lhs == __rhs); } 1229 1230 /** 1231 * @brief Tests the ordering of a string and a regular expression submatch. 1232 * @param __lhs A string. 1233 * @param __rhs A regular expression submatch. 1234 * @returns true if @a __lhs precedes @a __rhs, false otherwise. 1235 */ 1236 template<typename _Bi_iter> 1237 inline bool 1238 operator<(typename iterator_traits<_Bi_iter>::value_type const* __lhs, 1239 const sub_match<_Bi_iter>& __rhs) 1240 { return __rhs.compare(__lhs) > 0; } 1241 1242 /** 1243 * @brief Tests the ordering of a string and a regular expression submatch. 1244 * @param __lhs A string. 1245 * @param __rhs A regular expression submatch. 1246 * @returns true if @a __lhs succeeds @a __rhs, false otherwise. 1247 */ 1248 template<typename _Bi_iter> 1249 inline bool 1250 operator>(typename iterator_traits<_Bi_iter>::value_type const* __lhs, 1251 const sub_match<_Bi_iter>& __rhs) 1252 { return __rhs < __lhs; } 1253 1254 /** 1255 * @brief Tests the ordering of a string and a regular expression submatch. 1256 * @param __lhs A string. 1257 * @param __rhs A regular expression submatch. 1258 * @returns true if @a __lhs does not precede @a __rhs, false otherwise. 1259 */ 1260 template<typename _Bi_iter> 1261 inline bool 1262 operator>=(typename iterator_traits<_Bi_iter>::value_type const* __lhs, 1263 const sub_match<_Bi_iter>& __rhs) 1264 { return !(__lhs < __rhs); } 1265 1266 /** 1267 * @brief Tests the ordering of a string and a regular expression submatch. 1268 * @param __lhs A string. 1269 * @param __rhs A regular expression submatch. 1270 * @returns true if @a __lhs does not succeed @a __rhs, false otherwise. 1271 */ 1272 template<typename _Bi_iter> 1273 inline bool 1274 operator<=(typename iterator_traits<_Bi_iter>::value_type const* __lhs, 1275 const sub_match<_Bi_iter>& __rhs) 1276 { return !(__rhs < __lhs); } 1277 1278 /** 1279 * @brief Tests the equivalence of a regular expression submatch and a 1280 * string. 1281 * @param __lhs A regular expression submatch. 1282 * @param __rhs A pointer to a string? 1283 * @returns true if @a __lhs is equivalent to @a __rhs, false otherwise. 1284 */ 1285 template<typename _Bi_iter> 1286 inline bool 1287 operator==(const sub_match<_Bi_iter>& __lhs, 1288 typename iterator_traits<_Bi_iter>::value_type const* __rhs) 1289 { return __lhs.compare(__rhs) == 0; } 1290 1291 /** 1292 * @brief Tests the inequivalence of a regular expression submatch and a 1293 * string. 1294 * @param __lhs A regular expression submatch. 1295 * @param __rhs A pointer to a string. 1296 * @returns true if @a __lhs is not equivalent to @a __rhs, false otherwise. 1297 */ 1298 template<typename _Bi_iter> 1299 inline bool 1300 operator!=(const sub_match<_Bi_iter>& __lhs, 1301 typename iterator_traits<_Bi_iter>::value_type const* __rhs) 1302 { return !(__lhs == __rhs); } 1303 1304 /** 1305 * @brief Tests the ordering of a regular expression submatch and a string. 1306 * @param __lhs A regular expression submatch. 1307 * @param __rhs A string. 1308 * @returns true if @a __lhs precedes @a __rhs, false otherwise. 1309 */ 1310 template<typename _Bi_iter> 1311 inline bool 1312 operator<(const sub_match<_Bi_iter>& __lhs, 1313 typename iterator_traits<_Bi_iter>::value_type const* __rhs) 1314 { return __lhs.compare(__rhs) < 0; } 1315 1316 /** 1317 * @brief Tests the ordering of a regular expression submatch and a string. 1318 * @param __lhs A regular expression submatch. 1319 * @param __rhs A string. 1320 * @returns true if @a __lhs succeeds @a __rhs, false otherwise. 1321 */ 1322 template<typename _Bi_iter> 1323 inline bool 1324 operator>(const sub_match<_Bi_iter>& __lhs, 1325 typename iterator_traits<_Bi_iter>::value_type const* __rhs) 1326 { return __rhs < __lhs; } 1327 1328 /** 1329 * @brief Tests the ordering of a regular expression submatch and a string. 1330 * @param __lhs A regular expression submatch. 1331 * @param __rhs A string. 1332 * @returns true if @a __lhs does not precede @a __rhs, false otherwise. 1333 */ 1334 template<typename _Bi_iter> 1335 inline bool 1336 operator>=(const sub_match<_Bi_iter>& __lhs, 1337 typename iterator_traits<_Bi_iter>::value_type const* __rhs) 1338 { return !(__lhs < __rhs); } 1339 1340 /** 1341 * @brief Tests the ordering of a regular expression submatch and a string. 1342 * @param __lhs A regular expression submatch. 1343 * @param __rhs A string. 1344 * @returns true if @a __lhs does not succeed @a __rhs, false otherwise. 1345 */ 1346 template<typename _Bi_iter> 1347 inline bool 1348 operator<=(const sub_match<_Bi_iter>& __lhs, 1349 typename iterator_traits<_Bi_iter>::value_type const* __rhs) 1350 { return !(__rhs < __lhs); } 1351 1352 /** 1353 * @brief Tests the equivalence of a string and a regular expression 1354 * submatch. 1355 * @param __lhs A string. 1356 * @param __rhs A regular expression submatch. 1357 * @returns true if @a __lhs is equivalent to @a __rhs, false otherwise. 1358 */ 1359 template<typename _Bi_iter> 1360 inline bool 1361 operator==(typename iterator_traits<_Bi_iter>::value_type const& __lhs, 1362 const sub_match<_Bi_iter>& __rhs) 1363 { 1364 typedef typename sub_match<_Bi_iter>::string_type string_type; 1365 return __rhs.compare(string_type(1, __lhs)) == 0; 1366 } 1367 1368 /** 1369 * @brief Tests the inequivalence of a string and a regular expression 1370 * submatch. 1371 * @param __lhs A string. 1372 * @param __rhs A regular expression submatch. 1373 * @returns true if @a __lhs is not equivalent to @a __rhs, false otherwise. 1374 */ 1375 template<typename _Bi_iter> 1376 inline bool 1377 operator!=(typename iterator_traits<_Bi_iter>::value_type const& __lhs, 1378 const sub_match<_Bi_iter>& __rhs) 1379 { return !(__lhs == __rhs); } 1380 1381 /** 1382 * @brief Tests the ordering of a string and a regular expression submatch. 1383 * @param __lhs A string. 1384 * @param __rhs A regular expression submatch. 1385 * @returns true if @a __lhs precedes @a __rhs, false otherwise. 1386 */ 1387 template<typename _Bi_iter> 1388 inline bool 1389 operator<(typename iterator_traits<_Bi_iter>::value_type const& __lhs, 1390 const sub_match<_Bi_iter>& __rhs) 1391 { 1392 typedef typename sub_match<_Bi_iter>::string_type string_type; 1393 return __rhs.compare(string_type(1, __lhs)) > 0; 1394 } 1395 1396 /** 1397 * @brief Tests the ordering of a string and a regular expression submatch. 1398 * @param __lhs A string. 1399 * @param __rhs A regular expression submatch. 1400 * @returns true if @a __lhs succeeds @a __rhs, false otherwise. 1401 */ 1402 template<typename _Bi_iter> 1403 inline bool 1404 operator>(typename iterator_traits<_Bi_iter>::value_type const& __lhs, 1405 const sub_match<_Bi_iter>& __rhs) 1406 { return __rhs < __lhs; } 1407 1408 /** 1409 * @brief Tests the ordering of a string and a regular expression submatch. 1410 * @param __lhs A string. 1411 * @param __rhs A regular expression submatch. 1412 * @returns true if @a __lhs does not precede @a __rhs, false otherwise. 1413 */ 1414 template<typename _Bi_iter> 1415 inline bool 1416 operator>=(typename iterator_traits<_Bi_iter>::value_type const& __lhs, 1417 const sub_match<_Bi_iter>& __rhs) 1418 { return !(__lhs < __rhs); } 1419 1420 /** 1421 * @brief Tests the ordering of a string and a regular expression submatch. 1422 * @param __lhs A string. 1423 * @param __rhs A regular expression submatch. 1424 * @returns true if @a __lhs does not succeed @a __rhs, false otherwise. 1425 */ 1426 template<typename _Bi_iter> 1427 inline bool 1428 operator<=(typename iterator_traits<_Bi_iter>::value_type const& __lhs, 1429 const sub_match<_Bi_iter>& __rhs) 1430 { return !(__rhs < __lhs); } 1431 1432 /** 1433 * @brief Tests the equivalence of a regular expression submatch and a 1434 * string. 1435 * @param __lhs A regular expression submatch. 1436 * @param __rhs A const string reference. 1437 * @returns true if @a __lhs is equivalent to @a __rhs, false otherwise. 1438 */ 1439 template<typename _Bi_iter> 1440 inline bool 1441 operator==(const sub_match<_Bi_iter>& __lhs, 1442 typename iterator_traits<_Bi_iter>::value_type const& __rhs) 1443 { 1444 typedef typename sub_match<_Bi_iter>::string_type string_type; 1445 return __lhs.compare(string_type(1, __rhs)) == 0; 1446 } 1447 1448 /** 1449 * @brief Tests the inequivalence of a regular expression submatch and a 1450 * string. 1451 * @param __lhs A regular expression submatch. 1452 * @param __rhs A const string reference. 1453 * @returns true if @a __lhs is not equivalent to @a __rhs, false otherwise. 1454 */ 1455 template<typename _Bi_iter> 1456 inline bool 1457 operator!=(const sub_match<_Bi_iter>& __lhs, 1458 typename iterator_traits<_Bi_iter>::value_type const& __rhs) 1459 { return !(__lhs == __rhs); } 1460 1461 /** 1462 * @brief Tests the ordering of a regular expression submatch and a string. 1463 * @param __lhs A regular expression submatch. 1464 * @param __rhs A const string reference. 1465 * @returns true if @a __lhs precedes @a __rhs, false otherwise. 1466 */ 1467 template<typename _Bi_iter> 1468 inline bool 1469 operator<(const sub_match<_Bi_iter>& __lhs, 1470 typename iterator_traits<_Bi_iter>::value_type const& __rhs) 1471 { 1472 typedef typename sub_match<_Bi_iter>::string_type string_type; 1473 return __lhs.compare(string_type(1, __rhs)) < 0; 1474 } 1475 1476 /** 1477 * @brief Tests the ordering of a regular expression submatch and a string. 1478 * @param __lhs A regular expression submatch. 1479 * @param __rhs A const string reference. 1480 * @returns true if @a __lhs succeeds @a __rhs, false otherwise. 1481 */ 1482 template<typename _Bi_iter> 1483 inline bool 1484 operator>(const sub_match<_Bi_iter>& __lhs, 1485 typename iterator_traits<_Bi_iter>::value_type const& __rhs) 1486 { return __rhs < __lhs; } 1487 1488 /** 1489 * @brief Tests the ordering of a regular expression submatch and a string. 1490 * @param __lhs A regular expression submatch. 1491 * @param __rhs A const string reference. 1492 * @returns true if @a __lhs does not precede @a __rhs, false otherwise. 1493 */ 1494 template<typename _Bi_iter> 1495 inline bool 1496 operator>=(const sub_match<_Bi_iter>& __lhs, 1497 typename iterator_traits<_Bi_iter>::value_type const& __rhs) 1498 { return !(__lhs < __rhs); } 1499 1500 /** 1501 * @brief Tests the ordering of a regular expression submatch and a string. 1502 * @param __lhs A regular expression submatch. 1503 * @param __rhs A const string reference. 1504 * @returns true if @a __lhs does not succeed @a __rhs, false otherwise. 1505 */ 1506 template<typename _Bi_iter> 1507 inline bool 1508 operator<=(const sub_match<_Bi_iter>& __lhs, 1509 typename iterator_traits<_Bi_iter>::value_type const& __rhs) 1510 { return !(__rhs < __lhs); } 1511 1512 /** 1513 * @brief Inserts a matched string into an output stream. 1514 * 1515 * @param __os The output stream. 1516 * @param __m A submatch string. 1517 * 1518 * @returns the output stream with the submatch string inserted. 1519 */ 1520 template<typename _Ch_type, typename _Ch_traits, typename _Bi_iter> 1521 inline 1522 basic_ostream<_Ch_type, _Ch_traits>& 1523 operator<<(basic_ostream<_Ch_type, _Ch_traits>& __os, 1524 const sub_match<_Bi_iter>& __m) 1525 { return __os << __m.str(); } 1526 1527 // [7.10] Class template match_results 1528 1529 /** 1530 * @brief The results of a match or search operation. 1531 * 1532 * A collection of character sequences representing the result of a regular 1533 * expression match. Storage for the collection is allocated and freed as 1534 * necessary by the member functions of class template match_results. 1535 * 1536 * This class satisfies the Sequence requirements, with the exception that 1537 * only the operations defined for a const-qualified Sequence are supported. 1538 * 1539 * The sub_match object stored at index 0 represents sub-expression 0, i.e. 1540 * the whole match. In this case the %sub_match member matched is always true. 1541 * The sub_match object stored at index n denotes what matched the marked 1542 * sub-expression n within the matched expression. If the sub-expression n 1543 * participated in a regular expression match then the %sub_match member 1544 * matched evaluates to true, and members first and second denote the range 1545 * of characters [first, second) which formed that match. Otherwise matched 1546 * is false, and members first and second point to the end of the sequence 1547 * that was searched. 1548 * 1549 * @nosubgrouping 1550 */ 1551 template<typename _Bi_iter, 1552 typename _Alloc = allocator<sub_match<_Bi_iter> > > 1553 class match_results 1554 : private std::vector<sub_match<_Bi_iter>, _Alloc> 1555 { 1556 private: 1557 /* 1558 * The vector base is empty if this does not represent a match (!ready()); 1559 * Otherwise if it's a match failure, it contains 3 elements: 1560 * [0] unmatched 1561 * [1] prefix 1562 * [2] suffix 1563 * Otherwise it contains n+4 elements where n is the number of marked 1564 * sub-expressions: 1565 * [0] entire match 1566 * [1] 1st marked subexpression 1567 * ... 1568 * [n] nth marked subexpression 1569 * [n+1] unmatched 1570 * [n+2] prefix 1571 * [n+3] suffix 1572 */ 1573 typedef std::vector<sub_match<_Bi_iter>, _Alloc> _Base_type; 1574 typedef std::iterator_traits<_Bi_iter> __iter_traits; 1575 typedef regex_constants::match_flag_type match_flag_type; 1576 1577 public: 1578 /** 1579 * @name 10.? Public Types 1580 */ 1581 //@{ 1582 typedef sub_match<_Bi_iter> value_type; 1583 typedef const value_type& const_reference; 1584 typedef const_reference reference; 1585 typedef typename _Base_type::const_iterator const_iterator; 1586 typedef const_iterator iterator; 1587 typedef typename __iter_traits::difference_type difference_type; 1588 typedef typename allocator_traits<_Alloc>::size_type size_type; 1589 typedef _Alloc allocator_type; 1590 typedef typename __iter_traits::value_type char_type; 1591 typedef std::basic_string<char_type> string_type; 1592 //@} 1593 1594 public: 1595 /** 1596 * @name 28.10.1 Construction, Copying, and Destruction 1597 */ 1598 //@{ 1599 1600 /** 1601 * @brief Constructs a default %match_results container. 1602 * @post size() returns 0 and str() returns an empty string. 1603 */ 1604 explicit 1605 match_results(const _Alloc& __a = _Alloc()) 1606 : _Base_type(__a) 1607 { } 1608 1609 /** 1610 * @brief Copy constructs a %match_results. 1611 */ 1612 match_results(const match_results& __rhs) = default; 1613 1614 /** 1615 * @brief Move constructs a %match_results. 1616 */ 1617 match_results(match_results&& __rhs) noexcept = default; 1618 1619 /** 1620 * @brief Assigns rhs to *this. 1621 */ 1622 match_results& 1623 operator=(const match_results& __rhs) = default; 1624 1625 /** 1626 * @brief Move-assigns rhs to *this. 1627 */ 1628 match_results& 1629 operator=(match_results&& __rhs) = default; 1630 1631 /** 1632 * @brief Destroys a %match_results object. 1633 */ 1634 ~match_results() 1635 { } 1636 1637 //@} 1638 1639 // 28.10.2, state: 1640 /** 1641 * @brief Indicates if the %match_results is ready. 1642 * @retval true The object has a fully-established result state. 1643 * @retval false The object is not ready. 1644 */ 1645 bool ready() const { return !_Base_type::empty(); } 1646 1647 /** 1648 * @name 28.10.2 Size 1649 */ 1650 //@{ 1651 1652 /** 1653 * @brief Gets the number of matches and submatches. 1654 * 1655 * The number of matches for a given regular expression will be either 0 1656 * if there was no match or mark_count() + 1 if a match was successful. 1657 * Some matches may be empty. 1658 * 1659 * @returns the number of matches found. 1660 */ 1661 size_type 1662 size() const 1663 { return _Base_type::empty() ? 0 : _Base_type::size() - 3; } 1664 1665 size_type 1666 max_size() const 1667 { return _Base_type::max_size(); } 1668 1669 /** 1670 * @brief Indicates if the %match_results contains no results. 1671 * @retval true The %match_results object is empty. 1672 * @retval false The %match_results object is not empty. 1673 */ 1674 bool 1675 empty() const 1676 { return size() == 0; } 1677 1678 //@} 1679 1680 /** 1681 * @name 10.3 Element Access 1682 */ 1683 //@{ 1684 1685 /** 1686 * @brief Gets the length of the indicated submatch. 1687 * @param __sub indicates the submatch. 1688 * @pre ready() == true 1689 * 1690 * This function returns the length of the indicated submatch, or the 1691 * length of the entire match if @p __sub is zero (the default). 1692 */ 1693 difference_type 1694 length(size_type __sub = 0) const 1695 { return (*this)[__sub].length(); } 1696 1697 /** 1698 * @brief Gets the offset of the beginning of the indicated submatch. 1699 * @param __sub indicates the submatch. 1700 * @pre ready() == true 1701 * 1702 * This function returns the offset from the beginning of the target 1703 * sequence to the beginning of the submatch, unless the value of @p __sub 1704 * is zero (the default), in which case this function returns the offset 1705 * from the beginning of the target sequence to the beginning of the 1706 * match. 1707 */ 1708 difference_type 1709 position(size_type __sub = 0) const 1710 { return std::distance(_M_begin, (*this)[__sub].first); } 1711 1712 /** 1713 * @brief Gets the match or submatch converted to a string type. 1714 * @param __sub indicates the submatch. 1715 * @pre ready() == true 1716 * 1717 * This function gets the submatch (or match, if @p __sub is 1718 * zero) extracted from the target range and converted to the 1719 * associated string type. 1720 */ 1721 string_type 1722 str(size_type __sub = 0) const 1723 { return string_type((*this)[__sub]); } 1724 1725 /** 1726 * @brief Gets a %sub_match reference for the match or submatch. 1727 * @param __sub indicates the submatch. 1728 * @pre ready() == true 1729 * 1730 * This function gets a reference to the indicated submatch, or 1731 * the entire match if @p __sub is zero. 1732 * 1733 * If @p __sub >= size() then this function returns a %sub_match with a 1734 * special value indicating no submatch. 1735 */ 1736 const_reference 1737 operator[](size_type __sub) const 1738 { 1739 __glibcxx_assert( ready() ); 1740 return __sub < size() 1741 ? _Base_type::operator[](__sub) 1742 : _M_unmatched_sub(); 1743 } 1744 1745 /** 1746 * @brief Gets a %sub_match representing the match prefix. 1747 * @pre ready() == true 1748 * 1749 * This function gets a reference to a %sub_match object representing the 1750 * part of the target range between the start of the target range and the 1751 * start of the match. 1752 */ 1753 const_reference 1754 prefix() const 1755 { 1756 __glibcxx_assert( ready() ); 1757 return !empty() ? _M_prefix() : _M_unmatched_sub(); 1758 } 1759 1760 /** 1761 * @brief Gets a %sub_match representing the match suffix. 1762 * @pre ready() == true 1763 * 1764 * This function gets a reference to a %sub_match object representing the 1765 * part of the target range between the end of the match and the end of 1766 * the target range. 1767 */ 1768 const_reference 1769 suffix() const 1770 { 1771 __glibcxx_assert( ready() ); 1772 return !empty() ? _M_suffix() : _M_unmatched_sub(); 1773 } 1774 1775 /** 1776 * @brief Gets an iterator to the start of the %sub_match collection. 1777 */ 1778 const_iterator 1779 begin() const 1780 { return _Base_type::begin(); } 1781 1782 /** 1783 * @brief Gets an iterator to the start of the %sub_match collection. 1784 */ 1785 const_iterator 1786 cbegin() const 1787 { return this->begin(); } 1788 1789 /** 1790 * @brief Gets an iterator to one-past-the-end of the collection. 1791 */ 1792 const_iterator 1793 end() const 1794 { return _Base_type::end() - (empty() ? 0 : 3); } 1795 1796 /** 1797 * @brief Gets an iterator to one-past-the-end of the collection. 1798 */ 1799 const_iterator 1800 cend() const 1801 { return this->end(); } 1802 1803 //@} 1804 1805 /** 1806 * @name 10.4 Formatting 1807 * 1808 * These functions perform formatted substitution of the matched 1809 * character sequences into their target. The format specifiers and 1810 * escape sequences accepted by these functions are determined by 1811 * their @p flags parameter as documented above. 1812 */ 1813 //@{ 1814 1815 /** 1816 * @pre ready() == true 1817 */ 1818 template<typename _Out_iter> 1819 _Out_iter 1820 format(_Out_iter __out, const char_type* __fmt_first, 1821 const char_type* __fmt_last, 1822 match_flag_type __flags = regex_constants::format_default) const; 1823 1824 /** 1825 * @pre ready() == true 1826 */ 1827 template<typename _Out_iter, typename _St, typename _Sa> 1828 _Out_iter 1829 format(_Out_iter __out, const basic_string<char_type, _St, _Sa>& __fmt, 1830 match_flag_type __flags = regex_constants::format_default) const 1831 { 1832 return format(__out, __fmt.data(), __fmt.data() + __fmt.size(), 1833 __flags); 1834 } 1835 1836 /** 1837 * @pre ready() == true 1838 */ 1839 template<typename _St, typename _Sa> 1840 basic_string<char_type, _St, _Sa> 1841 format(const basic_string<char_type, _St, _Sa>& __fmt, 1842 match_flag_type __flags = regex_constants::format_default) const 1843 { 1844 basic_string<char_type, _St, _Sa> __result; 1845 format(std::back_inserter(__result), __fmt, __flags); 1846 return __result; 1847 } 1848 1849 /** 1850 * @pre ready() == true 1851 */ 1852 string_type 1853 format(const char_type* __fmt, 1854 match_flag_type __flags = regex_constants::format_default) const 1855 { 1856 string_type __result; 1857 format(std::back_inserter(__result), 1858 __fmt, 1859 __fmt + char_traits<char_type>::length(__fmt), 1860 __flags); 1861 return __result; 1862 } 1863 1864 //@} 1865 1866 /** 1867 * @name 10.5 Allocator 1868 */ 1869 //@{ 1870 1871 /** 1872 * @brief Gets a copy of the allocator. 1873 */ 1874 allocator_type 1875 get_allocator() const 1876 { return _Base_type::get_allocator(); } 1877 1878 //@} 1879 1880 /** 1881 * @name 10.6 Swap 1882 */ 1883 //@{ 1884 1885 /** 1886 * @brief Swaps the contents of two match_results. 1887 */ 1888 void 1889 swap(match_results& __that) 1890 { 1891 using std::swap; 1892 _Base_type::swap(__that); 1893 swap(_M_begin, __that._M_begin); 1894 } 1895 //@} 1896 1897 private: 1898 template<typename, typename, typename, bool> 1899 friend class __detail::_Executor; 1900 1901 template<typename, typename, typename> 1902 friend class regex_iterator; 1903 1904 template<typename _Bp, typename _Ap, typename _Cp, typename _Rp, 1905 __detail::_RegexExecutorPolicy, bool> 1906 friend bool __detail:: 1907 #if _GLIBCXX_INLINE_VERSION 1908 __7:: // Required due to PR c++/59256 1909 #endif 1910 __regex_algo_impl(_Bp, _Bp, match_results<_Bp, _Ap>&, 1911 const basic_regex<_Cp, _Rp>&, 1912 regex_constants::match_flag_type); 1913 1914 void 1915 _M_resize(unsigned int __size) 1916 { _Base_type::resize(__size + 3); } 1917 1918 const_reference 1919 _M_unmatched_sub() const 1920 { return _Base_type::operator[](_Base_type::size() - 3); } 1921 1922 sub_match<_Bi_iter>& 1923 _M_unmatched_sub() 1924 { return _Base_type::operator[](_Base_type::size() - 3); } 1925 1926 const_reference 1927 _M_prefix() const 1928 { return _Base_type::operator[](_Base_type::size() - 2); } 1929 1930 sub_match<_Bi_iter>& 1931 _M_prefix() 1932 { return _Base_type::operator[](_Base_type::size() - 2); } 1933 1934 const_reference 1935 _M_suffix() const 1936 { return _Base_type::operator[](_Base_type::size() - 1); } 1937 1938 sub_match<_Bi_iter>& 1939 _M_suffix() 1940 { return _Base_type::operator[](_Base_type::size() - 1); } 1941 1942 _Bi_iter _M_begin; 1943 }; 1944 1945 typedef match_results<const char*> cmatch; 1946 typedef match_results<string::const_iterator> smatch; 1947 #ifdef _GLIBCXX_USE_WCHAR_T 1948 typedef match_results<const wchar_t*> wcmatch; 1949 typedef match_results<wstring::const_iterator> wsmatch; 1950 #endif 1951 1952 // match_results comparisons 1953 /** 1954 * @brief Compares two match_results for equality. 1955 * @returns true if the two objects refer to the same match, 1956 * false otherwise. 1957 */ 1958 template<typename _Bi_iter, typename _Alloc> 1959 inline bool 1960 operator==(const match_results<_Bi_iter, _Alloc>& __m1, 1961 const match_results<_Bi_iter, _Alloc>& __m2) 1962 { 1963 if (__m1.ready() != __m2.ready()) 1964 return false; 1965 if (!__m1.ready()) // both are not ready 1966 return true; 1967 if (__m1.empty() != __m2.empty()) 1968 return false; 1969 if (__m1.empty()) // both are empty 1970 return true; 1971 return __m1.prefix() == __m2.prefix() 1972 && __m1.size() == __m2.size() 1973 && std::equal(__m1.begin(), __m1.end(), __m2.begin()) 1974 && __m1.suffix() == __m2.suffix(); 1975 } 1976 1977 /** 1978 * @brief Compares two match_results for inequality. 1979 * @returns true if the two objects do not refer to the same match, 1980 * false otherwise. 1981 */ 1982 template<typename _Bi_iter, class _Alloc> 1983 inline bool 1984 operator!=(const match_results<_Bi_iter, _Alloc>& __m1, 1985 const match_results<_Bi_iter, _Alloc>& __m2) 1986 { return !(__m1 == __m2); } 1987 1988 // [7.10.6] match_results swap 1989 /** 1990 * @brief Swaps two match results. 1991 * @param __lhs A match result. 1992 * @param __rhs A match result. 1993 * 1994 * The contents of the two match_results objects are swapped. 1995 */ 1996 template<typename _Bi_iter, typename _Alloc> 1997 inline void 1998 swap(match_results<_Bi_iter, _Alloc>& __lhs, 1999 match_results<_Bi_iter, _Alloc>& __rhs) 2000 { __lhs.swap(__rhs); } 2001 2002 _GLIBCXX_END_NAMESPACE_CXX11 2003 2004 // [7.11.2] Function template regex_match 2005 /** 2006 * @name Matching, Searching, and Replacing 2007 */ 2008 //@{ 2009 2010 /** 2011 * @brief Determines if there is a match between the regular expression @p e 2012 * and all of the character sequence [first, last). 2013 * 2014 * @param __s Start of the character sequence to match. 2015 * @param __e One-past-the-end of the character sequence to match. 2016 * @param __m The match results. 2017 * @param __re The regular expression. 2018 * @param __flags Controls how the regular expression is matched. 2019 * 2020 * @retval true A match exists. 2021 * @retval false Otherwise. 2022 * 2023 * @throws an exception of type regex_error. 2024 */ 2025 template<typename _Bi_iter, typename _Alloc, 2026 typename _Ch_type, typename _Rx_traits> 2027 inline bool 2028 regex_match(_Bi_iter __s, 2029 _Bi_iter __e, 2030 match_results<_Bi_iter, _Alloc>& __m, 2031 const basic_regex<_Ch_type, _Rx_traits>& __re, 2032 regex_constants::match_flag_type __flags 2033 = regex_constants::match_default) 2034 { 2035 return __detail::__regex_algo_impl<_Bi_iter, _Alloc, _Ch_type, _Rx_traits, 2036 __detail::_RegexExecutorPolicy::_S_auto, true> 2037 (__s, __e, __m, __re, __flags); 2038 } 2039 2040 /** 2041 * @brief Indicates if there is a match between the regular expression @p e 2042 * and all of the character sequence [first, last). 2043 * 2044 * @param __first Beginning of the character sequence to match. 2045 * @param __last One-past-the-end of the character sequence to match. 2046 * @param __re The regular expression. 2047 * @param __flags Controls how the regular expression is matched. 2048 * 2049 * @retval true A match exists. 2050 * @retval false Otherwise. 2051 * 2052 * @throws an exception of type regex_error. 2053 */ 2054 template<typename _Bi_iter, typename _Ch_type, typename _Rx_traits> 2055 inline bool 2056 regex_match(_Bi_iter __first, _Bi_iter __last, 2057 const basic_regex<_Ch_type, _Rx_traits>& __re, 2058 regex_constants::match_flag_type __flags 2059 = regex_constants::match_default) 2060 { 2061 match_results<_Bi_iter> __what; 2062 return regex_match(__first, __last, __what, __re, __flags); 2063 } 2064 2065 /** 2066 * @brief Determines if there is a match between the regular expression @p e 2067 * and a C-style null-terminated string. 2068 * 2069 * @param __s The C-style null-terminated string to match. 2070 * @param __m The match results. 2071 * @param __re The regular expression. 2072 * @param __f Controls how the regular expression is matched. 2073 * 2074 * @retval true A match exists. 2075 * @retval false Otherwise. 2076 * 2077 * @throws an exception of type regex_error. 2078 */ 2079 template<typename _Ch_type, typename _Alloc, typename _Rx_traits> 2080 inline bool 2081 regex_match(const _Ch_type* __s, 2082 match_results<const _Ch_type*, _Alloc>& __m, 2083 const basic_regex<_Ch_type, _Rx_traits>& __re, 2084 regex_constants::match_flag_type __f 2085 = regex_constants::match_default) 2086 { return regex_match(__s, __s + _Rx_traits::length(__s), __m, __re, __f); } 2087 2088 /** 2089 * @brief Determines if there is a match between the regular expression @p e 2090 * and a string. 2091 * 2092 * @param __s The string to match. 2093 * @param __m The match results. 2094 * @param __re The regular expression. 2095 * @param __flags Controls how the regular expression is matched. 2096 * 2097 * @retval true A match exists. 2098 * @retval false Otherwise. 2099 * 2100 * @throws an exception of type regex_error. 2101 */ 2102 template<typename _Ch_traits, typename _Ch_alloc, 2103 typename _Alloc, typename _Ch_type, typename _Rx_traits> 2104 inline bool 2105 regex_match(const basic_string<_Ch_type, _Ch_traits, _Ch_alloc>& __s, 2106 match_results<typename basic_string<_Ch_type, 2107 _Ch_traits, _Ch_alloc>::const_iterator, _Alloc>& __m, 2108 const basic_regex<_Ch_type, _Rx_traits>& __re, 2109 regex_constants::match_flag_type __flags 2110 = regex_constants::match_default) 2111 { return regex_match(__s.begin(), __s.end(), __m, __re, __flags); } 2112 2113 // _GLIBCXX_RESOLVE_LIB_DEFECTS 2114 // 2329. regex_match() with match_results should forbid temporary strings 2115 /// Prevent unsafe attempts to get match_results from a temporary string. 2116 template<typename _Ch_traits, typename _Ch_alloc, 2117 typename _Alloc, typename _Ch_type, typename _Rx_traits> 2118 bool 2119 regex_match(const basic_string<_Ch_type, _Ch_traits, _Ch_alloc>&&, 2120 match_results<typename basic_string<_Ch_type, 2121 _Ch_traits, _Ch_alloc>::const_iterator, _Alloc>&, 2122 const basic_regex<_Ch_type, _Rx_traits>&, 2123 regex_constants::match_flag_type 2124 = regex_constants::match_default) = delete; 2125 2126 /** 2127 * @brief Indicates if there is a match between the regular expression @p e 2128 * and a C-style null-terminated string. 2129 * 2130 * @param __s The C-style null-terminated string to match. 2131 * @param __re The regular expression. 2132 * @param __f Controls how the regular expression is matched. 2133 * 2134 * @retval true A match exists. 2135 * @retval false Otherwise. 2136 * 2137 * @throws an exception of type regex_error. 2138 */ 2139 template<typename _Ch_type, class _Rx_traits> 2140 inline bool 2141 regex_match(const _Ch_type* __s, 2142 const basic_regex<_Ch_type, _Rx_traits>& __re, 2143 regex_constants::match_flag_type __f 2144 = regex_constants::match_default) 2145 { return regex_match(__s, __s + _Rx_traits::length(__s), __re, __f); } 2146 2147 /** 2148 * @brief Indicates if there is a match between the regular expression @p e 2149 * and a string. 2150 * 2151 * @param __s [IN] The string to match. 2152 * @param __re [IN] The regular expression. 2153 * @param __flags [IN] Controls how the regular expression is matched. 2154 * 2155 * @retval true A match exists. 2156 * @retval false Otherwise. 2157 * 2158 * @throws an exception of type regex_error. 2159 */ 2160 template<typename _Ch_traits, typename _Str_allocator, 2161 typename _Ch_type, typename _Rx_traits> 2162 inline bool 2163 regex_match(const basic_string<_Ch_type, _Ch_traits, _Str_allocator>& __s, 2164 const basic_regex<_Ch_type, _Rx_traits>& __re, 2165 regex_constants::match_flag_type __flags 2166 = regex_constants::match_default) 2167 { return regex_match(__s.begin(), __s.end(), __re, __flags); } 2168 2169 // [7.11.3] Function template regex_search 2170 /** 2171 * Searches for a regular expression within a range. 2172 * @param __s [IN] The start of the string to search. 2173 * @param __e [IN] One-past-the-end of the string to search. 2174 * @param __m [OUT] The match results. 2175 * @param __re [IN] The regular expression to search for. 2176 * @param __flags [IN] Search policy flags. 2177 * @retval true A match was found within the string. 2178 * @retval false No match was found within the string, the content of %m is 2179 * undefined. 2180 * 2181 * @throws an exception of type regex_error. 2182 */ 2183 template<typename _Bi_iter, typename _Alloc, 2184 typename _Ch_type, typename _Rx_traits> 2185 inline bool 2186 regex_search(_Bi_iter __s, _Bi_iter __e, 2187 match_results<_Bi_iter, _Alloc>& __m, 2188 const basic_regex<_Ch_type, _Rx_traits>& __re, 2189 regex_constants::match_flag_type __flags 2190 = regex_constants::match_default) 2191 { 2192 return __detail::__regex_algo_impl<_Bi_iter, _Alloc, _Ch_type, _Rx_traits, 2193 __detail::_RegexExecutorPolicy::_S_auto, false> 2194 (__s, __e, __m, __re, __flags); 2195 } 2196 2197 /** 2198 * Searches for a regular expression within a range. 2199 * @param __first [IN] The start of the string to search. 2200 * @param __last [IN] One-past-the-end of the string to search. 2201 * @param __re [IN] The regular expression to search for. 2202 * @param __flags [IN] Search policy flags. 2203 * @retval true A match was found within the string. 2204 * @retval false No match was found within the string. 2205 * 2206 * @throws an exception of type regex_error. 2207 */ 2208 template<typename _Bi_iter, typename _Ch_type, typename _Rx_traits> 2209 inline bool 2210 regex_search(_Bi_iter __first, _Bi_iter __last, 2211 const basic_regex<_Ch_type, _Rx_traits>& __re, 2212 regex_constants::match_flag_type __flags 2213 = regex_constants::match_default) 2214 { 2215 match_results<_Bi_iter> __what; 2216 return regex_search(__first, __last, __what, __re, __flags); 2217 } 2218 2219 /** 2220 * @brief Searches for a regular expression within a C-string. 2221 * @param __s [IN] A C-string to search for the regex. 2222 * @param __m [OUT] The set of regex matches. 2223 * @param __e [IN] The regex to search for in @p s. 2224 * @param __f [IN] The search flags. 2225 * @retval true A match was found within the string. 2226 * @retval false No match was found within the string, the content of %m is 2227 * undefined. 2228 * 2229 * @throws an exception of type regex_error. 2230 */ 2231 template<typename _Ch_type, class _Alloc, class _Rx_traits> 2232 inline bool 2233 regex_search(const _Ch_type* __s, 2234 match_results<const _Ch_type*, _Alloc>& __m, 2235 const basic_regex<_Ch_type, _Rx_traits>& __e, 2236 regex_constants::match_flag_type __f 2237 = regex_constants::match_default) 2238 { return regex_search(__s, __s + _Rx_traits::length(__s), __m, __e, __f); } 2239 2240 /** 2241 * @brief Searches for a regular expression within a C-string. 2242 * @param __s [IN] The C-string to search. 2243 * @param __e [IN] The regular expression to search for. 2244 * @param __f [IN] Search policy flags. 2245 * @retval true A match was found within the string. 2246 * @retval false No match was found within the string. 2247 * 2248 * @throws an exception of type regex_error. 2249 */ 2250 template<typename _Ch_type, typename _Rx_traits> 2251 inline bool 2252 regex_search(const _Ch_type* __s, 2253 const basic_regex<_Ch_type, _Rx_traits>& __e, 2254 regex_constants::match_flag_type __f 2255 = regex_constants::match_default) 2256 { return regex_search(__s, __s + _Rx_traits::length(__s), __e, __f); } 2257 2258 /** 2259 * @brief Searches for a regular expression within a string. 2260 * @param __s [IN] The string to search. 2261 * @param __e [IN] The regular expression to search for. 2262 * @param __flags [IN] Search policy flags. 2263 * @retval true A match was found within the string. 2264 * @retval false No match was found within the string. 2265 * 2266 * @throws an exception of type regex_error. 2267 */ 2268 template<typename _Ch_traits, typename _String_allocator, 2269 typename _Ch_type, typename _Rx_traits> 2270 inline bool 2271 regex_search(const basic_string<_Ch_type, _Ch_traits, 2272 _String_allocator>& __s, 2273 const basic_regex<_Ch_type, _Rx_traits>& __e, 2274 regex_constants::match_flag_type __flags 2275 = regex_constants::match_default) 2276 { return regex_search(__s.begin(), __s.end(), __e, __flags); } 2277 2278 /** 2279 * @brief Searches for a regular expression within a string. 2280 * @param __s [IN] A C++ string to search for the regex. 2281 * @param __m [OUT] The set of regex matches. 2282 * @param __e [IN] The regex to search for in @p s. 2283 * @param __f [IN] The search flags. 2284 * @retval true A match was found within the string. 2285 * @retval false No match was found within the string, the content of %m is 2286 * undefined. 2287 * 2288 * @throws an exception of type regex_error. 2289 */ 2290 template<typename _Ch_traits, typename _Ch_alloc, 2291 typename _Alloc, typename _Ch_type, 2292 typename _Rx_traits> 2293 inline bool 2294 regex_search(const basic_string<_Ch_type, _Ch_traits, _Ch_alloc>& __s, 2295 match_results<typename basic_string<_Ch_type, 2296 _Ch_traits, _Ch_alloc>::const_iterator, _Alloc>& __m, 2297 const basic_regex<_Ch_type, _Rx_traits>& __e, 2298 regex_constants::match_flag_type __f 2299 = regex_constants::match_default) 2300 { return regex_search(__s.begin(), __s.end(), __m, __e, __f); } 2301 2302 // _GLIBCXX_RESOLVE_LIB_DEFECTS 2303 // 2329. regex_search() with match_results should forbid temporary strings 2304 /// Prevent unsafe attempts to get match_results from a temporary string. 2305 template<typename _Ch_traits, typename _Ch_alloc, 2306 typename _Alloc, typename _Ch_type, 2307 typename _Rx_traits> 2308 bool 2309 regex_search(const basic_string<_Ch_type, _Ch_traits, _Ch_alloc>&&, 2310 match_results<typename basic_string<_Ch_type, 2311 _Ch_traits, _Ch_alloc>::const_iterator, _Alloc>&, 2312 const basic_regex<_Ch_type, _Rx_traits>&, 2313 regex_constants::match_flag_type 2314 = regex_constants::match_default) = delete; 2315 2316 // std [28.11.4] Function template regex_replace 2317 /** 2318 * @brief Search for a regular expression within a range for multiple times, 2319 and replace the matched parts through filling a format string. 2320 * @param __out [OUT] The output iterator. 2321 * @param __first [IN] The start of the string to search. 2322 * @param __last [IN] One-past-the-end of the string to search. 2323 * @param __e [IN] The regular expression to search for. 2324 * @param __fmt [IN] The format string. 2325 * @param __flags [IN] Search and replace policy flags. 2326 * 2327 * @returns __out 2328 * @throws an exception of type regex_error. 2329 */ 2330 template<typename _Out_iter, typename _Bi_iter, 2331 typename _Rx_traits, typename _Ch_type, 2332 typename _St, typename _Sa> 2333 inline _Out_iter 2334 regex_replace(_Out_iter __out, _Bi_iter __first, _Bi_iter __last, 2335 const basic_regex<_Ch_type, _Rx_traits>& __e, 2336 const basic_string<_Ch_type, _St, _Sa>& __fmt, 2337 regex_constants::match_flag_type __flags 2338 = regex_constants::match_default) 2339 { 2340 return regex_replace(__out, __first, __last, __e, __fmt.c_str(), __flags); 2341 } 2342 2343 /** 2344 * @brief Search for a regular expression within a range for multiple times, 2345 and replace the matched parts through filling a format C-string. 2346 * @param __out [OUT] The output iterator. 2347 * @param __first [IN] The start of the string to search. 2348 * @param __last [IN] One-past-the-end of the string to search. 2349 * @param __e [IN] The regular expression to search for. 2350 * @param __fmt [IN] The format C-string. 2351 * @param __flags [IN] Search and replace policy flags. 2352 * 2353 * @returns __out 2354 * @throws an exception of type regex_error. 2355 */ 2356 template<typename _Out_iter, typename _Bi_iter, 2357 typename _Rx_traits, typename _Ch_type> 2358 _Out_iter 2359 regex_replace(_Out_iter __out, _Bi_iter __first, _Bi_iter __last, 2360 const basic_regex<_Ch_type, _Rx_traits>& __e, 2361 const _Ch_type* __fmt, 2362 regex_constants::match_flag_type __flags 2363 = regex_constants::match_default); 2364 2365 /** 2366 * @brief Search for a regular expression within a string for multiple times, 2367 and replace the matched parts through filling a format string. 2368 * @param __s [IN] The string to search and replace. 2369 * @param __e [IN] The regular expression to search for. 2370 * @param __fmt [IN] The format string. 2371 * @param __flags [IN] Search and replace policy flags. 2372 * 2373 * @returns The string after replacing. 2374 * @throws an exception of type regex_error. 2375 */ 2376 template<typename _Rx_traits, typename _Ch_type, 2377 typename _St, typename _Sa, typename _Fst, typename _Fsa> 2378 inline basic_string<_Ch_type, _St, _Sa> 2379 regex_replace(const basic_string<_Ch_type, _St, _Sa>& __s, 2380 const basic_regex<_Ch_type, _Rx_traits>& __e, 2381 const basic_string<_Ch_type, _Fst, _Fsa>& __fmt, 2382 regex_constants::match_flag_type __flags 2383 = regex_constants::match_default) 2384 { 2385 basic_string<_Ch_type, _St, _Sa> __result; 2386 regex_replace(std::back_inserter(__result), 2387 __s.begin(), __s.end(), __e, __fmt, __flags); 2388 return __result; 2389 } 2390 2391 /** 2392 * @brief Search for a regular expression within a string for multiple times, 2393 and replace the matched parts through filling a format C-string. 2394 * @param __s [IN] The string to search and replace. 2395 * @param __e [IN] The regular expression to search for. 2396 * @param __fmt [IN] The format C-string. 2397 * @param __flags [IN] Search and replace policy flags. 2398 * 2399 * @returns The string after replacing. 2400 * @throws an exception of type regex_error. 2401 */ 2402 template<typename _Rx_traits, typename _Ch_type, 2403 typename _St, typename _Sa> 2404 inline basic_string<_Ch_type, _St, _Sa> 2405 regex_replace(const basic_string<_Ch_type, _St, _Sa>& __s, 2406 const basic_regex<_Ch_type, _Rx_traits>& __e, 2407 const _Ch_type* __fmt, 2408 regex_constants::match_flag_type __flags 2409 = regex_constants::match_default) 2410 { 2411 basic_string<_Ch_type, _St, _Sa> __result; 2412 regex_replace(std::back_inserter(__result), 2413 __s.begin(), __s.end(), __e, __fmt, __flags); 2414 return __result; 2415 } 2416 2417 /** 2418 * @brief Search for a regular expression within a C-string for multiple 2419 times, and replace the matched parts through filling a format string. 2420 * @param __s [IN] The C-string to search and replace. 2421 * @param __e [IN] The regular expression to search for. 2422 * @param __fmt [IN] The format string. 2423 * @param __flags [IN] Search and replace policy flags. 2424 * 2425 * @returns The string after replacing. 2426 * @throws an exception of type regex_error. 2427 */ 2428 template<typename _Rx_traits, typename _Ch_type, 2429 typename _St, typename _Sa> 2430 inline basic_string<_Ch_type> 2431 regex_replace(const _Ch_type* __s, 2432 const basic_regex<_Ch_type, _Rx_traits>& __e, 2433 const basic_string<_Ch_type, _St, _Sa>& __fmt, 2434 regex_constants::match_flag_type __flags 2435 = regex_constants::match_default) 2436 { 2437 basic_string<_Ch_type> __result; 2438 regex_replace(std::back_inserter(__result), __s, 2439 __s + char_traits<_Ch_type>::length(__s), 2440 __e, __fmt, __flags); 2441 return __result; 2442 } 2443 2444 /** 2445 * @brief Search for a regular expression within a C-string for multiple 2446 times, and replace the matched parts through filling a format C-string. 2447 * @param __s [IN] The C-string to search and replace. 2448 * @param __e [IN] The regular expression to search for. 2449 * @param __fmt [IN] The format C-string. 2450 * @param __flags [IN] Search and replace policy flags. 2451 * 2452 * @returns The string after replacing. 2453 * @throws an exception of type regex_error. 2454 */ 2455 template<typename _Rx_traits, typename _Ch_type> 2456 inline basic_string<_Ch_type> 2457 regex_replace(const _Ch_type* __s, 2458 const basic_regex<_Ch_type, _Rx_traits>& __e, 2459 const _Ch_type* __fmt, 2460 regex_constants::match_flag_type __flags 2461 = regex_constants::match_default) 2462 { 2463 basic_string<_Ch_type> __result; 2464 regex_replace(std::back_inserter(__result), __s, 2465 __s + char_traits<_Ch_type>::length(__s), 2466 __e, __fmt, __flags); 2467 return __result; 2468 } 2469 2470 //@} 2471 2472 _GLIBCXX_BEGIN_NAMESPACE_CXX11 2473 2474 // std [28.12] Class template regex_iterator 2475 /** 2476 * An iterator adaptor that will provide repeated calls of regex_search over 2477 * a range until no more matches remain. 2478 */ 2479 template<typename _Bi_iter, 2480 typename _Ch_type = typename iterator_traits<_Bi_iter>::value_type, 2481 typename _Rx_traits = regex_traits<_Ch_type> > 2482 class regex_iterator 2483 { 2484 public: 2485 typedef basic_regex<_Ch_type, _Rx_traits> regex_type; 2486 typedef match_results<_Bi_iter> value_type; 2487 typedef std::ptrdiff_t difference_type; 2488 typedef const value_type* pointer; 2489 typedef const value_type& reference; 2490 typedef std::forward_iterator_tag iterator_category; 2491 2492 /** 2493 * @brief Provides a singular iterator, useful for indicating 2494 * one-past-the-end of a range. 2495 */ 2496 regex_iterator() 2497 : _M_pregex() 2498 { } 2499 2500 /** 2501 * Constructs a %regex_iterator... 2502 * @param __a [IN] The start of a text range to search. 2503 * @param __b [IN] One-past-the-end of the text range to search. 2504 * @param __re [IN] The regular expression to match. 2505 * @param __m [IN] Policy flags for match rules. 2506 */ 2507 regex_iterator(_Bi_iter __a, _Bi_iter __b, const regex_type& __re, 2508 regex_constants::match_flag_type __m 2509 = regex_constants::match_default) 2510 : _M_begin(__a), _M_end(__b), _M_pregex(&__re), _M_flags(__m), _M_match() 2511 { 2512 if (!regex_search(_M_begin, _M_end, _M_match, *_M_pregex, _M_flags)) 2513 *this = regex_iterator(); 2514 } 2515 2516 // _GLIBCXX_RESOLVE_LIB_DEFECTS 2517 // 2332. regex_iterator should forbid temporary regexes 2518 regex_iterator(_Bi_iter, _Bi_iter, const regex_type&&, 2519 regex_constants::match_flag_type 2520 = regex_constants::match_default) = delete; 2521 /** 2522 * Copy constructs a %regex_iterator. 2523 */ 2524 regex_iterator(const regex_iterator& __rhs) = default; 2525 2526 /** 2527 * @brief Assigns one %regex_iterator to another. 2528 */ 2529 regex_iterator& 2530 operator=(const regex_iterator& __rhs) = default; 2531 2532 /** 2533 * @brief Tests the equivalence of two regex iterators. 2534 */ 2535 bool 2536 operator==(const regex_iterator& __rhs) const; 2537 2538 /** 2539 * @brief Tests the inequivalence of two regex iterators. 2540 */ 2541 bool 2542 operator!=(const regex_iterator& __rhs) const 2543 { return !(*this == __rhs); } 2544 2545 /** 2546 * @brief Dereferences a %regex_iterator. 2547 */ 2548 const value_type& 2549 operator*() const 2550 { return _M_match; } 2551 2552 /** 2553 * @brief Selects a %regex_iterator member. 2554 */ 2555 const value_type* 2556 operator->() const 2557 { return &_M_match; } 2558 2559 /** 2560 * @brief Increments a %regex_iterator. 2561 */ 2562 regex_iterator& 2563 operator++(); 2564 2565 /** 2566 * @brief Postincrements a %regex_iterator. 2567 */ 2568 regex_iterator 2569 operator++(int) 2570 { 2571 auto __tmp = *this; 2572 ++(*this); 2573 return __tmp; 2574 } 2575 2576 private: 2577 _Bi_iter _M_begin; 2578 _Bi_iter _M_end; 2579 const regex_type* _M_pregex; 2580 regex_constants::match_flag_type _M_flags; 2581 match_results<_Bi_iter> _M_match; 2582 }; 2583 2584 typedef regex_iterator<const char*> cregex_iterator; 2585 typedef regex_iterator<string::const_iterator> sregex_iterator; 2586 #ifdef _GLIBCXX_USE_WCHAR_T 2587 typedef regex_iterator<const wchar_t*> wcregex_iterator; 2588 typedef regex_iterator<wstring::const_iterator> wsregex_iterator; 2589 #endif 2590 2591 // [7.12.2] Class template regex_token_iterator 2592 /** 2593 * Iterates over submatches in a range (or @a splits a text string). 2594 * 2595 * The purpose of this iterator is to enumerate all, or all specified, 2596 * matches of a regular expression within a text range. The dereferenced 2597 * value of an iterator of this class is a std::sub_match object. 2598 */ 2599 template<typename _Bi_iter, 2600 typename _Ch_type = typename iterator_traits<_Bi_iter>::value_type, 2601 typename _Rx_traits = regex_traits<_Ch_type> > 2602 class regex_token_iterator 2603 { 2604 public: 2605 typedef basic_regex<_Ch_type, _Rx_traits> regex_type; 2606 typedef sub_match<_Bi_iter> value_type; 2607 typedef std::ptrdiff_t difference_type; 2608 typedef const value_type* pointer; 2609 typedef const value_type& reference; 2610 typedef std::forward_iterator_tag iterator_category; 2611 2612 public: 2613 /** 2614 * @brief Default constructs a %regex_token_iterator. 2615 * 2616 * A default-constructed %regex_token_iterator is a singular iterator 2617 * that will compare equal to the one-past-the-end value for any 2618 * iterator of the same type. 2619 */ 2620 regex_token_iterator() 2621 : _M_position(), _M_subs(), _M_suffix(), _M_n(0), _M_result(nullptr), 2622 _M_has_m1(false) 2623 { } 2624 2625 /** 2626 * Constructs a %regex_token_iterator... 2627 * @param __a [IN] The start of the text to search. 2628 * @param __b [IN] One-past-the-end of the text to search. 2629 * @param __re [IN] The regular expression to search for. 2630 * @param __submatch [IN] Which submatch to return. There are some 2631 * special values for this parameter: 2632 * - -1 each enumerated subexpression does NOT 2633 * match the regular expression (aka field 2634 * splitting) 2635 * - 0 the entire string matching the 2636 * subexpression is returned for each match 2637 * within the text. 2638 * - >0 enumerates only the indicated 2639 * subexpression from a match within the text. 2640 * @param __m [IN] Policy flags for match rules. 2641 */ 2642 regex_token_iterator(_Bi_iter __a, _Bi_iter __b, const regex_type& __re, 2643 int __submatch = 0, 2644 regex_constants::match_flag_type __m 2645 = regex_constants::match_default) 2646 : _M_position(__a, __b, __re, __m), _M_subs(1, __submatch), _M_n(0) 2647 { _M_init(__a, __b); } 2648 2649 /** 2650 * Constructs a %regex_token_iterator... 2651 * @param __a [IN] The start of the text to search. 2652 * @param __b [IN] One-past-the-end of the text to search. 2653 * @param __re [IN] The regular expression to search for. 2654 * @param __submatches [IN] A list of subexpressions to return for each 2655 * regular expression match within the text. 2656 * @param __m [IN] Policy flags for match rules. 2657 */ 2658 regex_token_iterator(_Bi_iter __a, _Bi_iter __b, 2659 const regex_type& __re, 2660 const std::vector<int>& __submatches, 2661 regex_constants::match_flag_type __m 2662 = regex_constants::match_default) 2663 : _M_position(__a, __b, __re, __m), _M_subs(__submatches), _M_n(0) 2664 { _M_init(__a, __b); } 2665 2666 /** 2667 * Constructs a %regex_token_iterator... 2668 * @param __a [IN] The start of the text to search. 2669 * @param __b [IN] One-past-the-end of the text to search. 2670 * @param __re [IN] The regular expression to search for. 2671 * @param __submatches [IN] A list of subexpressions to return for each 2672 * regular expression match within the text. 2673 * @param __m [IN] Policy flags for match rules. 2674 */ 2675 regex_token_iterator(_Bi_iter __a, _Bi_iter __b, 2676 const regex_type& __re, 2677 initializer_list<int> __submatches, 2678 regex_constants::match_flag_type __m 2679 = regex_constants::match_default) 2680 : _M_position(__a, __b, __re, __m), _M_subs(__submatches), _M_n(0) 2681 { _M_init(__a, __b); } 2682 2683 /** 2684 * Constructs a %regex_token_iterator... 2685 * @param __a [IN] The start of the text to search. 2686 * @param __b [IN] One-past-the-end of the text to search. 2687 * @param __re [IN] The regular expression to search for. 2688 * @param __submatches [IN] A list of subexpressions to return for each 2689 * regular expression match within the text. 2690 * @param __m [IN] Policy flags for match rules. 2691 */ 2692 template<std::size_t _Nm> 2693 regex_token_iterator(_Bi_iter __a, _Bi_iter __b, 2694 const regex_type& __re, 2695 const int (&__submatches)[_Nm], 2696 regex_constants::match_flag_type __m 2697 = regex_constants::match_default) 2698 : _M_position(__a, __b, __re, __m), 2699 _M_subs(__submatches, __submatches + _Nm), _M_n(0) 2700 { _M_init(__a, __b); } 2701 2702 // _GLIBCXX_RESOLVE_LIB_DEFECTS 2703 // 2332. regex_token_iterator should forbid temporary regexes 2704 regex_token_iterator(_Bi_iter, _Bi_iter, const regex_type&&, int = 0, 2705 regex_constants::match_flag_type = 2706 regex_constants::match_default) = delete; 2707 regex_token_iterator(_Bi_iter, _Bi_iter, const regex_type&&, 2708 const std::vector<int>&, 2709 regex_constants::match_flag_type = 2710 regex_constants::match_default) = delete; 2711 regex_token_iterator(_Bi_iter, _Bi_iter, const regex_type&&, 2712 initializer_list<int>, 2713 regex_constants::match_flag_type = 2714 regex_constants::match_default) = delete; 2715 template <std::size_t _Nm> 2716 regex_token_iterator(_Bi_iter, _Bi_iter, const regex_type&&, 2717 const int (&)[_Nm], 2718 regex_constants::match_flag_type = 2719 regex_constants::match_default) = delete; 2720 2721 /** 2722 * @brief Copy constructs a %regex_token_iterator. 2723 * @param __rhs [IN] A %regex_token_iterator to copy. 2724 */ 2725 regex_token_iterator(const regex_token_iterator& __rhs) 2726 : _M_position(__rhs._M_position), _M_subs(__rhs._M_subs), 2727 _M_suffix(__rhs._M_suffix), _M_n(__rhs._M_n), _M_has_m1(__rhs._M_has_m1) 2728 { _M_normalize_result(); } 2729 2730 /** 2731 * @brief Assigns a %regex_token_iterator to another. 2732 * @param __rhs [IN] A %regex_token_iterator to copy. 2733 */ 2734 regex_token_iterator& 2735 operator=(const regex_token_iterator& __rhs); 2736 2737 /** 2738 * @brief Compares a %regex_token_iterator to another for equality. 2739 */ 2740 bool 2741 operator==(const regex_token_iterator& __rhs) const; 2742 2743 /** 2744 * @brief Compares a %regex_token_iterator to another for inequality. 2745 */ 2746 bool 2747 operator!=(const regex_token_iterator& __rhs) const 2748 { return !(*this == __rhs); } 2749 2750 /** 2751 * @brief Dereferences a %regex_token_iterator. 2752 */ 2753 const value_type& 2754 operator*() const 2755 { return *_M_result; } 2756 2757 /** 2758 * @brief Selects a %regex_token_iterator member. 2759 */ 2760 const value_type* 2761 operator->() const 2762 { return _M_result; } 2763 2764 /** 2765 * @brief Increments a %regex_token_iterator. 2766 */ 2767 regex_token_iterator& 2768 operator++(); 2769 2770 /** 2771 * @brief Postincrements a %regex_token_iterator. 2772 */ 2773 regex_token_iterator 2774 operator++(int) 2775 { 2776 auto __tmp = *this; 2777 ++(*this); 2778 return __tmp; 2779 } 2780 2781 private: 2782 typedef regex_iterator<_Bi_iter, _Ch_type, _Rx_traits> _Position; 2783 2784 void 2785 _M_init(_Bi_iter __a, _Bi_iter __b); 2786 2787 const value_type& 2788 _M_current_match() const 2789 { 2790 if (_M_subs[_M_n] == -1) 2791 return (*_M_position).prefix(); 2792 else 2793 return (*_M_position)[_M_subs[_M_n]]; 2794 } 2795 2796 constexpr bool 2797 _M_end_of_seq() const 2798 { return _M_result == nullptr; } 2799 2800 // [28.12.2.2.4] 2801 void 2802 _M_normalize_result() 2803 { 2804 if (_M_position != _Position()) 2805 _M_result = &_M_current_match(); 2806 else if (_M_has_m1) 2807 _M_result = &_M_suffix; 2808 else 2809 _M_result = nullptr; 2810 } 2811 2812 _Position _M_position; 2813 std::vector<int> _M_subs; 2814 value_type _M_suffix; 2815 std::size_t _M_n; 2816 const value_type* _M_result; 2817 2818 // Show whether _M_subs contains -1 2819 bool _M_has_m1; 2820 }; 2821 2822 /** @brief Token iterator for C-style NULL-terminated strings. */ 2823 typedef regex_token_iterator<const char*> cregex_token_iterator; 2824 2825 /** @brief Token iterator for standard strings. */ 2826 typedef regex_token_iterator<string::const_iterator> sregex_token_iterator; 2827 2828 #ifdef _GLIBCXX_USE_WCHAR_T 2829 /** @brief Token iterator for C-style NULL-terminated wide strings. */ 2830 typedef regex_token_iterator<const wchar_t*> wcregex_token_iterator; 2831 2832 /** @brief Token iterator for standard wide-character strings. */ 2833 typedef regex_token_iterator<wstring::const_iterator> wsregex_token_iterator; 2834 #endif 2835 2836 //@} // group regex 2837 2838 _GLIBCXX_END_NAMESPACE_CXX11 2839 _GLIBCXX_END_NAMESPACE_VERSION 2840 } // namespace 2841 2842 #include <bits/regex.tcc> 2843