libstdc++
regex.h
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1// class template regex -*- C++ -*-
2
3// Copyright (C) 2010-2018 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
31namespace 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
43namespace __detail
44{
45 enum class _RegexExecutorPolicy : int
46 { _S_auto, _S_alternate };
47
48 template<typename _BiIter, typename _Alloc,
49 typename _CharT, typename _TraitsT,
50 _RegexExecutorPolicy __policy,
51 bool __match_mode>
52 bool
53 __regex_algo_impl(_BiIter __s,
54 _BiIter __e,
55 match_results<_BiIter, _Alloc>& __m,
56 const basic_regex<_CharT, _TraitsT>& __re,
58
59 template<typename, typename, typename, bool>
60 class _Executor;
61}
62
63_GLIBCXX_BEGIN_NAMESPACE_CXX11
64
65 /**
66 * @addtogroup regex
67 * @{
68 */
69
70 /**
71 * @brief Describes aspects of a regular expression.
72 *
73 * A regular expression traits class that satisfies the requirements of
74 * section [28.7].
75 *
76 * The class %regex is parameterized around a set of related types and
77 * functions used to complete the definition of its semantics. This class
78 * satisfies the requirements of such a traits class.
79 */
80 template<typename _Ch_type>
82 {
83 public:
84 typedef _Ch_type char_type;
87 private:
88 struct _RegexMask
89 {
90 typedef std::ctype_base::mask _BaseType;
91 _BaseType _M_base;
92 unsigned char _M_extended;
93 static constexpr unsigned char _S_under = 1 << 0;
94 static constexpr unsigned char _S_valid_mask = 0x1;
95
96 constexpr _RegexMask(_BaseType __base = 0,
97 unsigned char __extended = 0)
98 : _M_base(__base), _M_extended(__extended)
99 { }
100
101 constexpr _RegexMask
102 operator&(_RegexMask __other) const
103 {
104 return _RegexMask(_M_base & __other._M_base,
105 _M_extended & __other._M_extended);
106 }
107
108 constexpr _RegexMask
109 operator|(_RegexMask __other) const
110 {
111 return _RegexMask(_M_base | __other._M_base,
112 _M_extended | __other._M_extended);
113 }
114
115 constexpr _RegexMask
116 operator^(_RegexMask __other) const
117 {
118 return _RegexMask(_M_base ^ __other._M_base,
119 _M_extended ^ __other._M_extended);
120 }
121
122 constexpr _RegexMask
123 operator~() const
124 { return _RegexMask(~_M_base, ~_M_extended); }
125
126 _RegexMask&
127 operator&=(_RegexMask __other)
128 { return *this = (*this) & __other; }
129
130 _RegexMask&
131 operator|=(_RegexMask __other)
132 { return *this = (*this) | __other; }
133
134 _RegexMask&
135 operator^=(_RegexMask __other)
136 { return *this = (*this) ^ __other; }
137
138 constexpr bool
139 operator==(_RegexMask __other) const
140 {
141 return (_M_extended & _S_valid_mask)
142 == (__other._M_extended & _S_valid_mask)
143 && _M_base == __other._M_base;
144 }
145
146 constexpr bool
147 operator!=(_RegexMask __other) const
148 { return !((*this) == __other); }
149
150 };
151 public:
152 typedef _RegexMask char_class_type;
153
154 public:
155 /**
156 * @brief Constructs a default traits object.
157 */
159
160 /**
161 * @brief Gives the length of a C-style string starting at @p __p.
162 *
163 * @param __p a pointer to the start of a character sequence.
164 *
165 * @returns the number of characters between @p *__p and the first
166 * default-initialized value of type @p char_type. In other words, uses
167 * the C-string algorithm for determining the length of a sequence of
168 * characters.
169 */
170 static std::size_t
171 length(const char_type* __p)
172 { return string_type::traits_type::length(__p); }
173
174 /**
175 * @brief Performs the identity translation.
176 *
177 * @param __c A character to the locale-specific character set.
178 *
179 * @returns __c.
180 */
181 char_type
182 translate(char_type __c) const
183 { return __c; }
184
185 /**
186 * @brief Translates a character into a case-insensitive equivalent.
187 *
188 * @param __c A character to the locale-specific character set.
189 *
190 * @returns the locale-specific lower-case equivalent of __c.
191 * @throws std::bad_cast if the imbued locale does not support the ctype
192 * facet.
193 */
194 char_type
195 translate_nocase(char_type __c) const
196 {
197 typedef std::ctype<char_type> __ctype_type;
198 const __ctype_type& __fctyp(use_facet<__ctype_type>(_M_locale));
199 return __fctyp.tolower(__c);
200 }
201
202 /**
203 * @brief Gets a sort key for a character sequence.
204 *
205 * @param __first beginning of the character sequence.
206 * @param __last one-past-the-end of the character sequence.
207 *
208 * Returns a sort key for the character sequence designated by the
209 * iterator range [F1, F2) such that if the character sequence [G1, G2)
210 * sorts before the character sequence [H1, H2) then
211 * v.transform(G1, G2) < v.transform(H1, H2).
212 *
213 * What this really does is provide a more efficient way to compare a
214 * string to multiple other strings in locales with fancy collation
215 * rules and equivalence classes.
216 *
217 * @returns a locale-specific sort key equivalent to the input range.
218 *
219 * @throws std::bad_cast if the current locale does not have a collate
220 * facet.
221 */
222 template<typename _Fwd_iter>
223 string_type
224 transform(_Fwd_iter __first, _Fwd_iter __last) const
225 {
226 typedef std::collate<char_type> __collate_type;
227 const __collate_type& __fclt(use_facet<__collate_type>(_M_locale));
228 string_type __s(__first, __last);
229 return __fclt.transform(__s.data(), __s.data() + __s.size());
230 }
231
232 /**
233 * @brief Gets a sort key for a character sequence, independent of case.
234 *
235 * @param __first beginning of the character sequence.
236 * @param __last one-past-the-end of the character sequence.
237 *
238 * Effects: if typeid(use_facet<collate<_Ch_type> >) ==
239 * typeid(collate_byname<_Ch_type>) and the form of the sort key
240 * returned by collate_byname<_Ch_type>::transform(__first, __last)
241 * is known and can be converted into a primary sort key
242 * then returns that key, otherwise returns an empty string.
243 *
244 * @todo Implement this function correctly.
245 */
246 template<typename _Fwd_iter>
247 string_type
248 transform_primary(_Fwd_iter __first, _Fwd_iter __last) const
249 {
250 // TODO : this is not entirely correct.
251 // This function requires extra support from the platform.
252 //
253 // Read http://gcc.gnu.org/ml/libstdc++/2013-09/msg00117.html and
254 // http://www.open-std.org/Jtc1/sc22/wg21/docs/papers/2003/n1429.htm
255 // for details.
256 typedef std::ctype<char_type> __ctype_type;
257 const __ctype_type& __fctyp(use_facet<__ctype_type>(_M_locale));
258 std::vector<char_type> __s(__first, __last);
259 __fctyp.tolower(__s.data(), __s.data() + __s.size());
260 return this->transform(__s.data(), __s.data() + __s.size());
261 }
262
263 /**
264 * @brief Gets a collation element by name.
265 *
266 * @param __first beginning of the collation element name.
267 * @param __last one-past-the-end of the collation element name.
268 *
269 * @returns a sequence of one or more characters that represents the
270 * collating element consisting of the character sequence designated by
271 * the iterator range [__first, __last). Returns an empty string if the
272 * character sequence is not a valid collating element.
273 */
274 template<typename _Fwd_iter>
275 string_type
276 lookup_collatename(_Fwd_iter __first, _Fwd_iter __last) const;
277
278 /**
279 * @brief Maps one or more characters to a named character
280 * classification.
281 *
282 * @param __first beginning of the character sequence.
283 * @param __last one-past-the-end of the character sequence.
284 * @param __icase ignores the case of the classification name.
285 *
286 * @returns an unspecified value that represents the character
287 * classification named by the character sequence designated by
288 * the iterator range [__first, __last). If @p icase is true,
289 * the returned mask identifies the classification regardless of
290 * the case of the characters to be matched (for example,
291 * [[:lower:]] is the same as [[:alpha:]]), otherwise a
292 * case-dependent classification is returned. The value
293 * returned shall be independent of the case of the characters
294 * in the character sequence. If the name is not recognized then
295 * returns a value that compares equal to 0.
296 *
297 * At least the following names (or their wide-character equivalent) are
298 * supported.
299 * - d
300 * - w
301 * - s
302 * - alnum
303 * - alpha
304 * - blank
305 * - cntrl
306 * - digit
307 * - graph
308 * - lower
309 * - print
310 * - punct
311 * - space
312 * - upper
313 * - xdigit
314 */
315 template<typename _Fwd_iter>
316 char_class_type
317 lookup_classname(_Fwd_iter __first, _Fwd_iter __last,
318 bool __icase = false) const;
319
320 /**
321 * @brief Determines if @p c is a member of an identified class.
322 *
323 * @param __c a character.
324 * @param __f a class type (as returned from lookup_classname).
325 *
326 * @returns true if the character @p __c is a member of the classification
327 * represented by @p __f, false otherwise.
328 *
329 * @throws std::bad_cast if the current locale does not have a ctype
330 * facet.
331 */
332 bool
333 isctype(_Ch_type __c, char_class_type __f) const;
334
335 /**
336 * @brief Converts a digit to an int.
337 *
338 * @param __ch a character representing a digit.
339 * @param __radix the radix if the numeric conversion (limited to 8, 10,
340 * or 16).
341 *
342 * @returns the value represented by the digit __ch in base radix if the
343 * character __ch is a valid digit in base radix; otherwise returns -1.
344 */
345 int
346 value(_Ch_type __ch, int __radix) const;
347
348 /**
349 * @brief Imbues the regex_traits object with a copy of a new locale.
350 *
351 * @param __loc A locale.
352 *
353 * @returns a copy of the previous locale in use by the regex_traits
354 * object.
355 *
356 * @note Calling imbue with a different locale than the one currently in
357 * use invalidates all cached data held by *this.
358 */
359 locale_type
361 {
362 std::swap(_M_locale, __loc);
363 return __loc;
364 }
365
366 /**
367 * @brief Gets a copy of the current locale in use by the regex_traits
368 * object.
369 */
370 locale_type
371 getloc() const
372 { return _M_locale; }
373
374 protected:
375 locale_type _M_locale;
376 };
377
378 // [7.8] Class basic_regex
379 /**
380 * Objects of specializations of this class represent regular expressions
381 * constructed from sequences of character type @p _Ch_type.
382 *
383 * Storage for the regular expression is allocated and deallocated as
384 * necessary by the member functions of this class.
385 */
386 template<typename _Ch_type, typename _Rx_traits = regex_traits<_Ch_type>>
388 {
389 public:
391 "regex traits class must have the same char_type");
392
393 // types:
394 typedef _Ch_type value_type;
395 typedef _Rx_traits traits_type;
396 typedef typename traits_type::string_type string_type;
398 typedef typename traits_type::locale_type locale_type;
399
400 /**
401 * @name Constants
402 * std [28.8.1](1)
403 */
404 //@{
415 //@}
416
417 // [7.8.2] construct/copy/destroy
418 /**
419 * Constructs a basic regular expression that does not match any
420 * character sequence.
421 */
423 : _M_flags(ECMAScript), _M_loc(), _M_automaton(nullptr)
424 { }
425
426 /**
427 * @brief Constructs a basic regular expression from the
428 * sequence [__p, __p + char_traits<_Ch_type>::length(__p))
429 * interpreted according to the flags in @p __f.
430 *
431 * @param __p A pointer to the start of a C-style null-terminated string
432 * containing a regular expression.
433 * @param __f Flags indicating the syntax rules and options.
434 *
435 * @throws regex_error if @p __p is not a valid regular expression.
436 */
437 explicit
438 basic_regex(const _Ch_type* __p, flag_type __f = ECMAScript)
439 : basic_regex(__p, __p + char_traits<_Ch_type>::length(__p), __f)
440 { }
441
442 /**
443 * @brief Constructs a basic regular expression from the sequence
444 * [p, p + len) interpreted according to the flags in @p f.
445 *
446 * @param __p A pointer to the start of a string containing a regular
447 * expression.
448 * @param __len The length of the string containing the regular
449 * expression.
450 * @param __f Flags indicating the syntax rules and options.
451 *
452 * @throws regex_error if @p __p is not a valid regular expression.
453 */
454 basic_regex(const _Ch_type* __p, std::size_t __len,
455 flag_type __f = ECMAScript)
456 : basic_regex(__p, __p + __len, __f)
457 { }
458
459 /**
460 * @brief Copy-constructs a basic regular expression.
461 *
462 * @param __rhs A @p regex object.
463 */
464 basic_regex(const basic_regex& __rhs) = default;
465
466 /**
467 * @brief Move-constructs a basic regular expression.
468 *
469 * @param __rhs A @p regex object.
470 */
471 basic_regex(basic_regex&& __rhs) noexcept = default;
472
473 /**
474 * @brief Constructs a basic regular expression from the string
475 * @p s interpreted according to the flags in @p f.
476 *
477 * @param __s A string containing a regular expression.
478 * @param __f Flags indicating the syntax rules and options.
479 *
480 * @throws regex_error if @p __s is not a valid regular expression.
481 */
482 template<typename _Ch_traits, typename _Ch_alloc>
483 explicit
484 basic_regex(const std::basic_string<_Ch_type, _Ch_traits,
485 _Ch_alloc>& __s,
486 flag_type __f = ECMAScript)
487 : basic_regex(__s.data(), __s.data() + __s.size(), __f)
488 { }
489
490 /**
491 * @brief Constructs a basic regular expression from the range
492 * [first, last) interpreted according to the flags in @p f.
493 *
494 * @param __first The start of a range containing a valid regular
495 * expression.
496 * @param __last The end of a range containing a valid regular
497 * expression.
498 * @param __f The format flags of the regular expression.
499 *
500 * @throws regex_error if @p [__first, __last) is not a valid regular
501 * expression.
502 */
503 template<typename _FwdIter>
504 basic_regex(_FwdIter __first, _FwdIter __last,
505 flag_type __f = ECMAScript)
506 : basic_regex(std::move(__first), std::move(__last), locale_type(), __f)
507 { }
508
509 /**
510 * @brief Constructs a basic regular expression from an initializer list.
511 *
512 * @param __l The initializer list.
513 * @param __f The format flags of the regular expression.
514 *
515 * @throws regex_error if @p __l is not a valid regular expression.
516 */
518 : basic_regex(__l.begin(), __l.end(), __f)
519 { }
520
521 /**
522 * @brief Destroys a basic regular expression.
523 */
525 { }
526
527 /**
528 * @brief Assigns one regular expression to another.
529 */
531 operator=(const basic_regex& __rhs)
532 { return this->assign(__rhs); }
533
534 /**
535 * @brief Move-assigns one regular expression to another.
536 */
538 operator=(basic_regex&& __rhs) noexcept
539 { return this->assign(std::move(__rhs)); }
540
541 /**
542 * @brief Replaces a regular expression with a new one constructed from
543 * a C-style null-terminated string.
544 *
545 * @param __p A pointer to the start of a null-terminated C-style string
546 * containing a regular expression.
547 */
549 operator=(const _Ch_type* __p)
550 { return this->assign(__p); }
551
552 /**
553 * @brief Replaces a regular expression with a new one constructed from
554 * an initializer list.
555 *
556 * @param __l The initializer list.
557 *
558 * @throws regex_error if @p __l is not a valid regular expression.
559 */
562 { return this->assign(__l.begin(), __l.end()); }
563
564 /**
565 * @brief Replaces a regular expression with a new one constructed from
566 * a string.
567 *
568 * @param __s A pointer to a string containing a regular expression.
569 */
570 template<typename _Ch_traits, typename _Alloc>
573 { return this->assign(__s); }
574
575 // [7.8.3] assign
576 /**
577 * @brief the real assignment operator.
578 *
579 * @param __rhs Another regular expression object.
580 */
582 assign(const basic_regex& __rhs)
583 {
584 basic_regex __tmp(__rhs);
585 this->swap(__tmp);
586 return *this;
587 }
588
589 /**
590 * @brief The move-assignment operator.
591 *
592 * @param __rhs Another regular expression object.
593 */
595 assign(basic_regex&& __rhs) noexcept
596 {
597 basic_regex __tmp(std::move(__rhs));
598 this->swap(__tmp);
599 return *this;
600 }
601
602 /**
603 * @brief Assigns a new regular expression to a regex object from a
604 * C-style null-terminated string containing a regular expression
605 * pattern.
606 *
607 * @param __p A pointer to a C-style null-terminated string containing
608 * a regular expression pattern.
609 * @param __flags Syntax option flags.
610 *
611 * @throws regex_error if __p does not contain a valid regular
612 * expression pattern interpreted according to @p __flags. If
613 * regex_error is thrown, *this remains unchanged.
614 */
616 assign(const _Ch_type* __p, flag_type __flags = ECMAScript)
617 { return this->assign(string_type(__p), __flags); }
618
619 /**
620 * @brief Assigns a new regular expression to a regex object from a
621 * C-style string containing a regular expression pattern.
622 *
623 * @param __p A pointer to a C-style string containing a
624 * regular expression pattern.
625 * @param __len The length of the regular expression pattern string.
626 * @param __flags Syntax option flags.
627 *
628 * @throws regex_error if p does not contain a valid regular
629 * expression pattern interpreted according to @p __flags. If
630 * regex_error is thrown, *this remains unchanged.
631 */
633 assign(const _Ch_type* __p, std::size_t __len, flag_type __flags)
634 { return this->assign(string_type(__p, __len), __flags); }
635
636 /**
637 * @brief Assigns a new regular expression to a regex object from a
638 * string containing a regular expression pattern.
639 *
640 * @param __s A string containing a regular expression pattern.
641 * @param __flags Syntax option flags.
642 *
643 * @throws regex_error if __s does not contain a valid regular
644 * expression pattern interpreted according to @p __flags. If
645 * regex_error is thrown, *this remains unchanged.
646 */
647 template<typename _Ch_traits, typename _Alloc>
650 flag_type __flags = ECMAScript)
651 {
652 return this->assign(basic_regex(__s.data(), __s.data() + __s.size(),
653 _M_loc, __flags));
654 }
655
656 /**
657 * @brief Assigns a new regular expression to a regex object.
658 *
659 * @param __first The start of a range containing a valid regular
660 * expression.
661 * @param __last The end of a range containing a valid regular
662 * expression.
663 * @param __flags Syntax option flags.
664 *
665 * @throws regex_error if p does not contain a valid regular
666 * expression pattern interpreted according to @p __flags. If
667 * regex_error is thrown, the object remains unchanged.
668 */
669 template<typename _InputIterator>
671 assign(_InputIterator __first, _InputIterator __last,
672 flag_type __flags = ECMAScript)
673 { return this->assign(string_type(__first, __last), __flags); }
674
675 /**
676 * @brief Assigns a new regular expression to a regex object.
677 *
678 * @param __l An initializer list representing a regular expression.
679 * @param __flags Syntax option flags.
680 *
681 * @throws regex_error if @p __l does not contain a valid
682 * regular expression pattern interpreted according to @p
683 * __flags. If regex_error is thrown, the object remains
684 * unchanged.
685 */
688 { return this->assign(__l.begin(), __l.end(), __flags); }
689
690 // [7.8.4] const operations
691 /**
692 * @brief Gets the number of marked subexpressions within the regular
693 * expression.
694 */
695 unsigned int
697 {
698 if (_M_automaton)
699 return _M_automaton->_M_sub_count() - 1;
700 return 0;
701 }
702
703 /**
704 * @brief Gets the flags used to construct the regular expression
705 * or in the last call to assign().
706 */
707 flag_type
708 flags() const
709 { return _M_flags; }
710
711 // [7.8.5] locale
712 /**
713 * @brief Imbues the regular expression object with the given locale.
714 *
715 * @param __loc A locale.
716 */
717 locale_type
718 imbue(locale_type __loc)
719 {
720 std::swap(__loc, _M_loc);
721 _M_automaton.reset();
722 return __loc;
723 }
724
725 /**
726 * @brief Gets the locale currently imbued in the regular expression
727 * object.
728 */
729 locale_type
730 getloc() const
731 { return _M_loc; }
732
733 // [7.8.6] swap
734 /**
735 * @brief Swaps the contents of two regular expression objects.
736 *
737 * @param __rhs Another regular expression object.
738 */
739 void
741 {
742 std::swap(_M_flags, __rhs._M_flags);
743 std::swap(_M_loc, __rhs._M_loc);
744 std::swap(_M_automaton, __rhs._M_automaton);
745 }
746
747#ifdef _GLIBCXX_DEBUG
748 void
749 _M_dot(std::ostream& __ostr)
750 { _M_automaton->_M_dot(__ostr); }
751#endif
752
753 private:
755
756 template<typename _FwdIter>
757 basic_regex(_FwdIter __first, _FwdIter __last, locale_type __loc,
758 flag_type __f)
759 : _M_flags(__f), _M_loc(std::move(__loc)),
760 _M_automaton(__detail::__compile_nfa<_Rx_traits>(
761 std::move(__first), std::move(__last), _M_loc, _M_flags))
762 { }
763
764 template<typename _Bp, typename _Ap, typename _Cp, typename _Rp,
765 __detail::_RegexExecutorPolicy, bool>
766 friend bool
770
771 template<typename, typename, typename, bool>
773
774 flag_type _M_flags;
775 locale_type _M_loc;
776 _AutomatonPtr _M_automaton;
777 };
778
779#if __cplusplus < 201703L
780 template<typename _Ch, typename _Tr>
783
784 template<typename _Ch, typename _Tr>
787
788 template<typename _Ch, typename _Tr>
791
792 template<typename _Ch, typename _Tr>
795
796 template<typename _Ch, typename _Tr>
799
800 template<typename _Ch, typename _Tr>
803
804 template<typename _Ch, typename _Tr>
807
808 template<typename _Ch, typename _Tr>
811
812 template<typename _Ch, typename _Tr>
815
816 template<typename _Ch, typename _Tr>
819#endif // ! C++17
820
821#if __cpp_deduction_guides >= 201606
822 template<typename _ForwardIterator>
823 basic_regex(_ForwardIterator, _ForwardIterator,
825 -> basic_regex<typename iterator_traits<_ForwardIterator>::value_type>;
826#endif
827
828 /** @brief Standard regular expressions. */
830
831#ifdef _GLIBCXX_USE_WCHAR_T
832 /** @brief Standard wide-character regular expressions. */
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
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;
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. */
958
959 /** @brief Standard regex submatch over a standard string. */
961
962#ifdef _GLIBCXX_USE_WCHAR_T
963 /** @brief Regex submatch over a C-style null-terminated wide string. */
965
966 /** @brief Regex submatch over a standard wide string. */
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
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
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
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
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
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
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,
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,
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,
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,
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,
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,
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> > >
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 */
1574 typedef std::iterator_traits<_Bi_iter> __iter_traits;
1576
1577 public:
1578 /**
1579 * @name 10.? Public Types
1580 */
1581 //@{
1583 typedef const value_type& const_reference;
1584 typedef value_type& 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;
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 */
1623 operator=(const match_results& __rhs) = default;
1624
1625 /**
1626 * @brief Move-assigns rhs to *this.
1627 */
1629 operator=(match_results&& __rhs) = default;
1630
1631 /**
1632 * @brief Destroys a %match_results object.
1633 */
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,
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,
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>
1843 {
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,
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
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
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>
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
1908 const basic_regex<_Cp, _Rp>&,
1910
1911 void
1912 _M_resize(unsigned int __size)
1913 { _Base_type::resize(__size + 3); }
1914
1915 const_reference
1916 _M_unmatched_sub() const
1917 { return _Base_type::operator[](_Base_type::size() - 3); }
1918
1919 sub_match<_Bi_iter>&
1920 _M_unmatched_sub()
1921 { return _Base_type::operator[](_Base_type::size() - 3); }
1922
1923 const_reference
1924 _M_prefix() const
1925 { return _Base_type::operator[](_Base_type::size() - 2); }
1926
1927 sub_match<_Bi_iter>&
1928 _M_prefix()
1929 { return _Base_type::operator[](_Base_type::size() - 2); }
1930
1931 const_reference
1932 _M_suffix() const
1933 { return _Base_type::operator[](_Base_type::size() - 1); }
1934
1935 sub_match<_Bi_iter>&
1936 _M_suffix()
1937 { return _Base_type::operator[](_Base_type::size() - 1); }
1938
1939 _Bi_iter _M_begin;
1940 };
1941
1942 typedef match_results<const char*> cmatch;
1943 typedef match_results<string::const_iterator> smatch;
1944#ifdef _GLIBCXX_USE_WCHAR_T
1945 typedef match_results<const wchar_t*> wcmatch;
1946 typedef match_results<wstring::const_iterator> wsmatch;
1947#endif
1948
1949 // match_results comparisons
1950 /**
1951 * @brief Compares two match_results for equality.
1952 * @returns true if the two objects refer to the same match,
1953 * false otherwise.
1954 */
1955 template<typename _Bi_iter, typename _Alloc>
1956 inline bool
1957 operator==(const match_results<_Bi_iter, _Alloc>& __m1,
1959 {
1960 if (__m1.ready() != __m2.ready())
1961 return false;
1962 if (!__m1.ready()) // both are not ready
1963 return true;
1964 if (__m1.empty() != __m2.empty())
1965 return false;
1966 if (__m1.empty()) // both are empty
1967 return true;
1968 return __m1.prefix() == __m2.prefix()
1969 && __m1.size() == __m2.size()
1970 && std::equal(__m1.begin(), __m1.end(), __m2.begin())
1971 && __m1.suffix() == __m2.suffix();
1972 }
1973
1974 /**
1975 * @brief Compares two match_results for inequality.
1976 * @returns true if the two objects do not refer to the same match,
1977 * false otherwise.
1978 */
1979 template<typename _Bi_iter, class _Alloc>
1980 inline bool
1981 operator!=(const match_results<_Bi_iter, _Alloc>& __m1,
1983 { return !(__m1 == __m2); }
1984
1985 // [7.10.6] match_results swap
1986 /**
1987 * @brief Swaps two match results.
1988 * @param __lhs A match result.
1989 * @param __rhs A match result.
1990 *
1991 * The contents of the two match_results objects are swapped.
1992 */
1993 template<typename _Bi_iter, typename _Alloc>
1994 inline void
1997 { __lhs.swap(__rhs); }
1998
1999_GLIBCXX_END_NAMESPACE_CXX11
2000
2001 // [7.11.2] Function template regex_match
2002 /**
2003 * @name Matching, Searching, and Replacing
2004 */
2005 //@{
2006
2007 /**
2008 * @brief Determines if there is a match between the regular expression @p e
2009 * and all of the character sequence [first, last).
2010 *
2011 * @param __s Start of the character sequence to match.
2012 * @param __e One-past-the-end of the character sequence to match.
2013 * @param __m The match results.
2014 * @param __re The regular expression.
2015 * @param __flags Controls how the regular expression is matched.
2016 *
2017 * @retval true A match exists.
2018 * @retval false Otherwise.
2019 *
2020 * @throws an exception of type regex_error.
2021 */
2022 template<typename _Bi_iter, typename _Alloc,
2023 typename _Ch_type, typename _Rx_traits>
2024 inline bool
2025 regex_match(_Bi_iter __s,
2026 _Bi_iter __e,
2031 {
2032 return __detail::__regex_algo_impl<_Bi_iter, _Alloc, _Ch_type, _Rx_traits,
2033 __detail::_RegexExecutorPolicy::_S_auto, true>
2034 (__s, __e, __m, __re, __flags);
2035 }
2036
2037 /**
2038 * @brief Indicates if there is a match between the regular expression @p e
2039 * and all of the character sequence [first, last).
2040 *
2041 * @param __first Beginning of the character sequence to match.
2042 * @param __last One-past-the-end of the character sequence to match.
2043 * @param __re The regular expression.
2044 * @param __flags Controls how the regular expression is matched.
2045 *
2046 * @retval true A match exists.
2047 * @retval false Otherwise.
2048 *
2049 * @throws an exception of type regex_error.
2050 */
2051 template<typename _Bi_iter, typename _Ch_type, typename _Rx_traits>
2052 inline bool
2053 regex_match(_Bi_iter __first, _Bi_iter __last,
2057 {
2059 return regex_match(__first, __last, __what, __re, __flags);
2060 }
2061
2062 /**
2063 * @brief Determines if there is a match between the regular expression @p e
2064 * and a C-style null-terminated string.
2065 *
2066 * @param __s The C-style null-terminated string to match.
2067 * @param __m The match results.
2068 * @param __re The regular expression.
2069 * @param __f Controls how the regular expression is matched.
2070 *
2071 * @retval true A match exists.
2072 * @retval false Otherwise.
2073 *
2074 * @throws an exception of type regex_error.
2075 */
2076 template<typename _Ch_type, typename _Alloc, typename _Rx_traits>
2077 inline bool
2078 regex_match(const _Ch_type* __s,
2083 { return regex_match(__s, __s + _Rx_traits::length(__s), __m, __re, __f); }
2084
2085 /**
2086 * @brief Determines if there is a match between the regular expression @p e
2087 * and a string.
2088 *
2089 * @param __s The string to match.
2090 * @param __m The match results.
2091 * @param __re The regular expression.
2092 * @param __flags Controls how the regular expression is matched.
2093 *
2094 * @retval true A match exists.
2095 * @retval false Otherwise.
2096 *
2097 * @throws an exception of type regex_error.
2098 */
2099 template<typename _Ch_traits, typename _Ch_alloc,
2100 typename _Alloc, typename _Ch_type, typename _Rx_traits>
2101 inline bool
2103 match_results<typename basic_string<_Ch_type,
2104 _Ch_traits, _Ch_alloc>::const_iterator, _Alloc>& __m,
2108 { return regex_match(__s.begin(), __s.end(), __m, __re, __flags); }
2109
2110 // _GLIBCXX_RESOLVE_LIB_DEFECTS
2111 // 2329. regex_match() with match_results should forbid temporary strings
2112 /// Prevent unsafe attempts to get match_results from a temporary string.
2113 template<typename _Ch_traits, typename _Ch_alloc,
2114 typename _Alloc, typename _Ch_type, typename _Rx_traits>
2115 bool
2117 match_results<typename basic_string<_Ch_type,
2118 _Ch_traits, _Ch_alloc>::const_iterator, _Alloc>&,
2122
2123 /**
2124 * @brief Indicates if there is a match between the regular expression @p e
2125 * and a C-style null-terminated string.
2126 *
2127 * @param __s The C-style null-terminated string to match.
2128 * @param __re The regular expression.
2129 * @param __f Controls how the regular expression is matched.
2130 *
2131 * @retval true A match exists.
2132 * @retval false Otherwise.
2133 *
2134 * @throws an exception of type regex_error.
2135 */
2136 template<typename _Ch_type, class _Rx_traits>
2137 inline bool
2138 regex_match(const _Ch_type* __s,
2142 { return regex_match(__s, __s + _Rx_traits::length(__s), __re, __f); }
2143
2144 /**
2145 * @brief Indicates if there is a match between the regular expression @p e
2146 * and a string.
2147 *
2148 * @param __s [IN] The string to match.
2149 * @param __re [IN] The regular expression.
2150 * @param __flags [IN] Controls how the regular expression is matched.
2151 *
2152 * @retval true A match exists.
2153 * @retval false Otherwise.
2154 *
2155 * @throws an exception of type regex_error.
2156 */
2157 template<typename _Ch_traits, typename _Str_allocator,
2158 typename _Ch_type, typename _Rx_traits>
2159 inline bool
2164 { return regex_match(__s.begin(), __s.end(), __re, __flags); }
2165
2166 // [7.11.3] Function template regex_search
2167 /**
2168 * Searches for a regular expression within a range.
2169 * @param __s [IN] The start of the string to search.
2170 * @param __e [IN] One-past-the-end of the string to search.
2171 * @param __m [OUT] The match results.
2172 * @param __re [IN] The regular expression to search for.
2173 * @param __flags [IN] Search policy flags.
2174 * @retval true A match was found within the string.
2175 * @retval false No match was found within the string, the content of %m is
2176 * undefined.
2177 *
2178 * @throws an exception of type regex_error.
2179 */
2180 template<typename _Bi_iter, typename _Alloc,
2181 typename _Ch_type, typename _Rx_traits>
2182 inline bool
2183 regex_search(_Bi_iter __s, _Bi_iter __e,
2188 {
2189 return __detail::__regex_algo_impl<_Bi_iter, _Alloc, _Ch_type, _Rx_traits,
2190 __detail::_RegexExecutorPolicy::_S_auto, false>
2191 (__s, __e, __m, __re, __flags);
2192 }
2193
2194 /**
2195 * Searches for a regular expression within a range.
2196 * @param __first [IN] The start of the string to search.
2197 * @param __last [IN] One-past-the-end of the string to search.
2198 * @param __re [IN] The regular expression to search for.
2199 * @param __flags [IN] Search policy flags.
2200 * @retval true A match was found within the string.
2201 * @retval false No match was found within the string.
2202 *
2203 * @throws an exception of type regex_error.
2204 */
2205 template<typename _Bi_iter, typename _Ch_type, typename _Rx_traits>
2206 inline bool
2207 regex_search(_Bi_iter __first, _Bi_iter __last,
2211 {
2213 return regex_search(__first, __last, __what, __re, __flags);
2214 }
2215
2216 /**
2217 * @brief Searches for a regular expression within a C-string.
2218 * @param __s [IN] A C-string to search for the regex.
2219 * @param __m [OUT] The set of regex matches.
2220 * @param __e [IN] The regex to search for in @p s.
2221 * @param __f [IN] The search flags.
2222 * @retval true A match was found within the string.
2223 * @retval false No match was found within the string, the content of %m is
2224 * undefined.
2225 *
2226 * @throws an exception of type regex_error.
2227 */
2228 template<typename _Ch_type, class _Alloc, class _Rx_traits>
2229 inline bool
2230 regex_search(const _Ch_type* __s,
2235 { return regex_search(__s, __s + _Rx_traits::length(__s), __m, __e, __f); }
2236
2237 /**
2238 * @brief Searches for a regular expression within a C-string.
2239 * @param __s [IN] The C-string to search.
2240 * @param __e [IN] The regular expression to search for.
2241 * @param __f [IN] Search policy flags.
2242 * @retval true A match was found within the string.
2243 * @retval false No match was found within the string.
2244 *
2245 * @throws an exception of type regex_error.
2246 */
2247 template<typename _Ch_type, typename _Rx_traits>
2248 inline bool
2249 regex_search(const _Ch_type* __s,
2253 { return regex_search(__s, __s + _Rx_traits::length(__s), __e, __f); }
2254
2255 /**
2256 * @brief Searches for a regular expression within a string.
2257 * @param __s [IN] The string to search.
2258 * @param __e [IN] The regular expression to search for.
2259 * @param __flags [IN] Search policy flags.
2260 * @retval true A match was found within the string.
2261 * @retval false No match was found within the string.
2262 *
2263 * @throws an exception of type regex_error.
2264 */
2265 template<typename _Ch_traits, typename _String_allocator,
2266 typename _Ch_type, typename _Rx_traits>
2267 inline bool
2268 regex_search(const basic_string<_Ch_type, _Ch_traits,
2269 _String_allocator>& __s,
2273 { return regex_search(__s.begin(), __s.end(), __e, __flags); }
2274
2275 /**
2276 * @brief Searches for a regular expression within a string.
2277 * @param __s [IN] A C++ string to search for the regex.
2278 * @param __m [OUT] The set of regex matches.
2279 * @param __e [IN] The regex to search for in @p s.
2280 * @param __f [IN] The search flags.
2281 * @retval true A match was found within the string.
2282 * @retval false No match was found within the string, the content of %m is
2283 * undefined.
2284 *
2285 * @throws an exception of type regex_error.
2286 */
2287 template<typename _Ch_traits, typename _Ch_alloc,
2288 typename _Alloc, typename _Ch_type,
2289 typename _Rx_traits>
2290 inline bool
2292 match_results<typename basic_string<_Ch_type,
2293 _Ch_traits, _Ch_alloc>::const_iterator, _Alloc>& __m,
2297 { return regex_search(__s.begin(), __s.end(), __m, __e, __f); }
2298
2299 // _GLIBCXX_RESOLVE_LIB_DEFECTS
2300 // 2329. regex_search() with match_results should forbid temporary strings
2301 /// Prevent unsafe attempts to get match_results from a temporary string.
2302 template<typename _Ch_traits, typename _Ch_alloc,
2303 typename _Alloc, typename _Ch_type,
2304 typename _Rx_traits>
2305 bool
2307 match_results<typename basic_string<_Ch_type,
2308 _Ch_traits, _Ch_alloc>::const_iterator, _Alloc>&,
2312
2313 // std [28.11.4] Function template regex_replace
2314 /**
2315 * @brief Search for a regular expression within a range for multiple times,
2316 and replace the matched parts through filling a format string.
2317 * @param __out [OUT] The output iterator.
2318 * @param __first [IN] The start of the string to search.
2319 * @param __last [IN] One-past-the-end of the string to search.
2320 * @param __e [IN] The regular expression to search for.
2321 * @param __fmt [IN] The format string.
2322 * @param __flags [IN] Search and replace policy flags.
2323 *
2324 * @returns __out
2325 * @throws an exception of type regex_error.
2326 */
2327 template<typename _Out_iter, typename _Bi_iter,
2328 typename _Rx_traits, typename _Ch_type,
2329 typename _St, typename _Sa>
2330 inline _Out_iter
2331 regex_replace(_Out_iter __out, _Bi_iter __first, _Bi_iter __last,
2336 {
2337 return regex_replace(__out, __first, __last, __e, __fmt.c_str(), __flags);
2338 }
2339
2340 /**
2341 * @brief Search for a regular expression within a range for multiple times,
2342 and replace the matched parts through filling a format C-string.
2343 * @param __out [OUT] The output iterator.
2344 * @param __first [IN] The start of the string to search.
2345 * @param __last [IN] One-past-the-end of the string to search.
2346 * @param __e [IN] The regular expression to search for.
2347 * @param __fmt [IN] The format C-string.
2348 * @param __flags [IN] Search and replace policy flags.
2349 *
2350 * @returns __out
2351 * @throws an exception of type regex_error.
2352 */
2353 template<typename _Out_iter, typename _Bi_iter,
2354 typename _Rx_traits, typename _Ch_type>
2355 _Out_iter
2356 regex_replace(_Out_iter __out, _Bi_iter __first, _Bi_iter __last,
2357 const basic_regex<_Ch_type, _Rx_traits>& __e,
2358 const _Ch_type* __fmt,
2361
2362 /**
2363 * @brief Search for a regular expression within a string for multiple times,
2364 and replace the matched parts through filling a format string.
2365 * @param __s [IN] The string to search and replace.
2366 * @param __e [IN] The regular expression to search for.
2367 * @param __fmt [IN] The format string.
2368 * @param __flags [IN] Search and replace policy flags.
2369 *
2370 * @returns The string after replacing.
2371 * @throws an exception of type regex_error.
2372 */
2373 template<typename _Rx_traits, typename _Ch_type,
2374 typename _St, typename _Sa, typename _Fst, typename _Fsa>
2375 inline basic_string<_Ch_type, _St, _Sa>
2381 {
2384 __s.begin(), __s.end(), __e, __fmt, __flags);
2385 return __result;
2386 }
2387
2388 /**
2389 * @brief Search for a regular expression within a string for multiple times,
2390 and replace the matched parts through filling a format C-string.
2391 * @param __s [IN] The string to search and replace.
2392 * @param __e [IN] The regular expression to search for.
2393 * @param __fmt [IN] The format C-string.
2394 * @param __flags [IN] Search and replace policy flags.
2395 *
2396 * @returns The string after replacing.
2397 * @throws an exception of type regex_error.
2398 */
2399 template<typename _Rx_traits, typename _Ch_type,
2400 typename _St, typename _Sa>
2401 inline basic_string<_Ch_type, _St, _Sa>
2404 const _Ch_type* __fmt,
2407 {
2410 __s.begin(), __s.end(), __e, __fmt, __flags);
2411 return __result;
2412 }
2413
2414 /**
2415 * @brief Search for a regular expression within a C-string for multiple
2416 times, and replace the matched parts through filling a format string.
2417 * @param __s [IN] The C-string to search and replace.
2418 * @param __e [IN] The regular expression to search for.
2419 * @param __fmt [IN] The format string.
2420 * @param __flags [IN] Search and replace policy flags.
2421 *
2422 * @returns The string after replacing.
2423 * @throws an exception of type regex_error.
2424 */
2425 template<typename _Rx_traits, typename _Ch_type,
2426 typename _St, typename _Sa>
2427 inline basic_string<_Ch_type>
2428 regex_replace(const _Ch_type* __s,
2433 {
2434 basic_string<_Ch_type> __result;
2435 regex_replace(std::back_inserter(__result), __s,
2437 __e, __fmt, __flags);
2438 return __result;
2439 }
2440
2441 /**
2442 * @brief Search for a regular expression within a C-string for multiple
2443 times, and replace the matched parts through filling a format C-string.
2444 * @param __s [IN] The C-string to search and replace.
2445 * @param __e [IN] The regular expression to search for.
2446 * @param __fmt [IN] The format C-string.
2447 * @param __flags [IN] Search and replace policy flags.
2448 *
2449 * @returns The string after replacing.
2450 * @throws an exception of type regex_error.
2451 */
2452 template<typename _Rx_traits, typename _Ch_type>
2453 inline basic_string<_Ch_type>
2454 regex_replace(const _Ch_type* __s,
2456 const _Ch_type* __fmt,
2459 {
2460 basic_string<_Ch_type> __result;
2461 regex_replace(std::back_inserter(__result), __s,
2463 __e, __fmt, __flags);
2464 return __result;
2465 }
2466
2467 //@}
2468
2469_GLIBCXX_BEGIN_NAMESPACE_CXX11
2470
2471 // std [28.12] Class template regex_iterator
2472 /**
2473 * An iterator adaptor that will provide repeated calls of regex_search over
2474 * a range until no more matches remain.
2475 */
2476 template<typename _Bi_iter,
2477 typename _Ch_type = typename iterator_traits<_Bi_iter>::value_type,
2478 typename _Rx_traits = regex_traits<_Ch_type> >
2480 {
2481 public:
2483 typedef match_results<_Bi_iter> value_type;
2484 typedef std::ptrdiff_t difference_type;
2485 typedef const value_type* pointer;
2486 typedef const value_type& reference;
2488
2489 /**
2490 * @brief Provides a singular iterator, useful for indicating
2491 * one-past-the-end of a range.
2492 */
2494 : _M_pregex()
2495 { }
2496
2497 /**
2498 * Constructs a %regex_iterator...
2499 * @param __a [IN] The start of a text range to search.
2500 * @param __b [IN] One-past-the-end of the text range to search.
2501 * @param __re [IN] The regular expression to match.
2502 * @param __m [IN] Policy flags for match rules.
2503 */
2504 regex_iterator(_Bi_iter __a, _Bi_iter __b, const regex_type& __re,
2507 : _M_begin(__a), _M_end(__b), _M_pregex(&__re), _M_flags(__m), _M_match()
2508 {
2509 if (!regex_search(_M_begin, _M_end, _M_match, *_M_pregex, _M_flags))
2510 *this = regex_iterator();
2511 }
2512
2513 // _GLIBCXX_RESOLVE_LIB_DEFECTS
2514 // 2332. regex_iterator should forbid temporary regexes
2515 regex_iterator(_Bi_iter, _Bi_iter, const regex_type&&,
2518 /**
2519 * Copy constructs a %regex_iterator.
2520 */
2521 regex_iterator(const regex_iterator& __rhs) = default;
2522
2523 /**
2524 * @brief Assigns one %regex_iterator to another.
2525 */
2527 operator=(const regex_iterator& __rhs) = default;
2528
2529 /**
2530 * @brief Tests the equivalence of two regex iterators.
2531 */
2532 bool
2533 operator==(const regex_iterator& __rhs) const;
2534
2535 /**
2536 * @brief Tests the inequivalence of two regex iterators.
2537 */
2538 bool
2539 operator!=(const regex_iterator& __rhs) const
2540 { return !(*this == __rhs); }
2541
2542 /**
2543 * @brief Dereferences a %regex_iterator.
2544 */
2545 const value_type&
2547 { return _M_match; }
2548
2549 /**
2550 * @brief Selects a %regex_iterator member.
2551 */
2552 const value_type*
2554 { return &_M_match; }
2555
2556 /**
2557 * @brief Increments a %regex_iterator.
2558 */
2560 operator++();
2561
2562 /**
2563 * @brief Postincrements a %regex_iterator.
2564 */
2567 {
2568 auto __tmp = *this;
2569 ++(*this);
2570 return __tmp;
2571 }
2572
2573 private:
2574 _Bi_iter _M_begin;
2575 _Bi_iter _M_end;
2576 const regex_type* _M_pregex;
2578 match_results<_Bi_iter> _M_match;
2579 };
2580
2583#ifdef _GLIBCXX_USE_WCHAR_T
2586#endif
2587
2588 // [7.12.2] Class template regex_token_iterator
2589 /**
2590 * Iterates over submatches in a range (or @a splits a text string).
2591 *
2592 * The purpose of this iterator is to enumerate all, or all specified,
2593 * matches of a regular expression within a text range. The dereferenced
2594 * value of an iterator of this class is a std::sub_match object.
2595 */
2596 template<typename _Bi_iter,
2597 typename _Ch_type = typename iterator_traits<_Bi_iter>::value_type,
2598 typename _Rx_traits = regex_traits<_Ch_type> >
2600 {
2601 public:
2604 typedef std::ptrdiff_t difference_type;
2605 typedef const value_type* pointer;
2606 typedef const value_type& reference;
2608
2609 public:
2610 /**
2611 * @brief Default constructs a %regex_token_iterator.
2612 *
2613 * A default-constructed %regex_token_iterator is a singular iterator
2614 * that will compare equal to the one-past-the-end value for any
2615 * iterator of the same type.
2616 */
2618 : _M_position(), _M_subs(), _M_suffix(), _M_n(0), _M_result(nullptr),
2619 _M_has_m1(false)
2620 { }
2621
2622 /**
2623 * Constructs a %regex_token_iterator...
2624 * @param __a [IN] The start of the text to search.
2625 * @param __b [IN] One-past-the-end of the text to search.
2626 * @param __re [IN] The regular expression to search for.
2627 * @param __submatch [IN] Which submatch to return. There are some
2628 * special values for this parameter:
2629 * - -1 each enumerated subexpression does NOT
2630 * match the regular expression (aka field
2631 * splitting)
2632 * - 0 the entire string matching the
2633 * subexpression is returned for each match
2634 * within the text.
2635 * - >0 enumerates only the indicated
2636 * subexpression from a match within the text.
2637 * @param __m [IN] Policy flags for match rules.
2638 */
2639 regex_token_iterator(_Bi_iter __a, _Bi_iter __b, const regex_type& __re,
2640 int __submatch = 0,
2643 : _M_position(__a, __b, __re, __m), _M_subs(1, __submatch), _M_n(0)
2644 { _M_init(__a, __b); }
2645
2646 /**
2647 * Constructs a %regex_token_iterator...
2648 * @param __a [IN] The start of the text to search.
2649 * @param __b [IN] One-past-the-end of the text to search.
2650 * @param __re [IN] The regular expression to search for.
2651 * @param __submatches [IN] A list of subexpressions to return for each
2652 * regular expression match within the text.
2653 * @param __m [IN] Policy flags for match rules.
2654 */
2655 regex_token_iterator(_Bi_iter __a, _Bi_iter __b,
2656 const regex_type& __re,
2657 const std::vector<int>& __submatches,
2660 : _M_position(__a, __b, __re, __m), _M_subs(__submatches), _M_n(0)
2661 { _M_init(__a, __b); }
2662
2663 /**
2664 * Constructs a %regex_token_iterator...
2665 * @param __a [IN] The start of the text to search.
2666 * @param __b [IN] One-past-the-end of the text to search.
2667 * @param __re [IN] The regular expression to search for.
2668 * @param __submatches [IN] A list of subexpressions to return for each
2669 * regular expression match within the text.
2670 * @param __m [IN] Policy flags for match rules.
2671 */
2672 regex_token_iterator(_Bi_iter __a, _Bi_iter __b,
2673 const regex_type& __re,
2674 initializer_list<int> __submatches,
2677 : _M_position(__a, __b, __re, __m), _M_subs(__submatches), _M_n(0)
2678 { _M_init(__a, __b); }
2679
2680 /**
2681 * Constructs a %regex_token_iterator...
2682 * @param __a [IN] The start of the text to search.
2683 * @param __b [IN] One-past-the-end of the text to search.
2684 * @param __re [IN] The regular expression to search for.
2685 * @param __submatches [IN] A list of subexpressions to return for each
2686 * regular expression match within the text.
2687 * @param __m [IN] Policy flags for match rules.
2688 */
2689 template<std::size_t _Nm>
2690 regex_token_iterator(_Bi_iter __a, _Bi_iter __b,
2691 const regex_type& __re,
2692 const int (&__submatches)[_Nm],
2695 : _M_position(__a, __b, __re, __m),
2696 _M_subs(__submatches, __submatches + _Nm), _M_n(0)
2697 { _M_init(__a, __b); }
2698
2699 // _GLIBCXX_RESOLVE_LIB_DEFECTS
2700 // 2332. regex_token_iterator should forbid temporary regexes
2701 regex_token_iterator(_Bi_iter, _Bi_iter, const regex_type&&, int = 0,
2704 regex_token_iterator(_Bi_iter, _Bi_iter, const regex_type&&,
2705 const std::vector<int>&,
2708 regex_token_iterator(_Bi_iter, _Bi_iter, const regex_type&&,
2712 template <std::size_t _Nm>
2713 regex_token_iterator(_Bi_iter, _Bi_iter, const regex_type&&,
2714 const int (&)[_Nm],
2717
2718 /**
2719 * @brief Copy constructs a %regex_token_iterator.
2720 * @param __rhs [IN] A %regex_token_iterator to copy.
2721 */
2723 : _M_position(__rhs._M_position), _M_subs(__rhs._M_subs),
2724 _M_suffix(__rhs._M_suffix), _M_n(__rhs._M_n), _M_has_m1(__rhs._M_has_m1)
2725 { _M_normalize_result(); }
2726
2727 /**
2728 * @brief Assigns a %regex_token_iterator to another.
2729 * @param __rhs [IN] A %regex_token_iterator to copy.
2730 */
2732 operator=(const regex_token_iterator& __rhs);
2733
2734 /**
2735 * @brief Compares a %regex_token_iterator to another for equality.
2736 */
2737 bool
2738 operator==(const regex_token_iterator& __rhs) const;
2739
2740 /**
2741 * @brief Compares a %regex_token_iterator to another for inequality.
2742 */
2743 bool
2745 { return !(*this == __rhs); }
2746
2747 /**
2748 * @brief Dereferences a %regex_token_iterator.
2749 */
2750 const value_type&
2752 { return *_M_result; }
2753
2754 /**
2755 * @brief Selects a %regex_token_iterator member.
2756 */
2757 const value_type*
2759 { return _M_result; }
2760
2761 /**
2762 * @brief Increments a %regex_token_iterator.
2763 */
2765 operator++();
2766
2767 /**
2768 * @brief Postincrements a %regex_token_iterator.
2769 */
2772 {
2773 auto __tmp = *this;
2774 ++(*this);
2775 return __tmp;
2776 }
2777
2778 private:
2780
2781 void
2782 _M_init(_Bi_iter __a, _Bi_iter __b);
2783
2784 const value_type&
2785 _M_current_match() const
2786 {
2787 if (_M_subs[_M_n] == -1)
2788 return (*_M_position).prefix();
2789 else
2790 return (*_M_position)[_M_subs[_M_n]];
2791 }
2792
2793 constexpr bool
2794 _M_end_of_seq() const
2795 { return _M_result == nullptr; }
2796
2797 // [28.12.2.2.4]
2798 void
2799 _M_normalize_result()
2800 {
2801 if (_M_position != _Position())
2802 _M_result = &_M_current_match();
2803 else if (_M_has_m1)
2804 _M_result = &_M_suffix;
2805 else
2806 _M_result = nullptr;
2807 }
2808
2809 _Position _M_position;
2810 std::vector<int> _M_subs;
2811 value_type _M_suffix;
2812 std::size_t _M_n;
2813 const value_type* _M_result;
2814
2815 // Show whether _M_subs contains -1
2816 bool _M_has_m1;
2817 };
2818
2819 /** @brief Token iterator for C-style NULL-terminated strings. */
2821
2822 /** @brief Token iterator for standard strings. */
2824
2825#ifdef _GLIBCXX_USE_WCHAR_T
2826 /** @brief Token iterator for C-style NULL-terminated wide strings. */
2828
2829 /** @brief Token iterator for standard wide-character strings. */
2831#endif
2832
2833 //@} // group regex
2834
2835_GLIBCXX_END_NAMESPACE_CXX11
2836_GLIBCXX_END_NAMESPACE_VERSION
2837} // namespace
2838
2839#include <bits/regex.tcc>
char_type translate(char_type __c) const
Performs the identity translation.
Definition: regex.h:182
basic_regex & assign(const _Ch_type *__p, flag_type __flags=ECMAScript)
Assigns a new regular expression to a regex object from a C-style null-terminated string containing a...
Definition: regex.h:616
regex_token_iterator(_Bi_iter __a, _Bi_iter __b, const regex_type &__re, const int(&__submatches)[_Nm], regex_constants::match_flag_type __m=regex_constants::match_default)
Definition: regex.h:2690
bool operator==(const regex_token_iterator &__rhs) const
Compares a regex_token_iterator to another for equality.
Definition: regex.tcc:594
sub_match< wstring::const_iterator > wssub_match
Regex submatch over a standard wide string.
Definition: regex.h:967
sub_match< string::const_iterator > ssub_match
Standard regex submatch over a standard string.
Definition: regex.h:960
basic_regex & operator=(const basic_regex &__rhs)
Assigns one regular expression to another.
Definition: regex.h:531
bool operator==(const regex_iterator &__rhs) const
Tests the equivalence of two regex iterators.
Definition: regex.tcc:503
bool empty() const
Indicates if the match_results contains no results.
Definition: regex.h:1675
_GLIBCXX17_INLINE constexpr syntax_option_type basic
friend bool __detail::__regex_algo_impl(_Bp, _Bp, match_results< _Bp, _Ap > &, const basic_regex< _Cp, _Rp > &, regex_constants::match_flag_type)
_GLIBCXX17_INLINE constexpr syntax_option_type awk
_GLIBCXX17_INLINE constexpr syntax_option_type egrep
_GLIBCXX17_INLINE constexpr syntax_option_type icase
regex_iterator()
Provides a singular iterator, useful for indicating one-past-the-end of a range.
Definition: regex.h:2493
difference_type position(size_type __sub=0) const
Gets the offset of the beginning of the indicated submatch.
Definition: regex.h:1709
sub_match< const char * > csub_match
Standard regex submatch over a C-style null-terminated string.
Definition: regex.h:957
_GLIBCXX17_INLINE constexpr syntax_option_type nosubs
regex_token_iterator< const char * > cregex_token_iterator
Token iterator for C-style NULL-terminated strings.
Definition: regex.h:2820
static std::size_t length(const char_type *__p)
Gives the length of a C-style string starting at __p.
Definition: regex.h:171
string_type transform_primary(_Fwd_iter __first, _Fwd_iter __last) const
Gets a sort key for a character sequence, independent of case.
Definition: regex.h:248
basic_regex & assign(_InputIterator __first, _InputIterator __last, flag_type __flags=ECMAScript)
Assigns a new regular expression to a regex object.
Definition: regex.h:671
regex_token_iterator(const regex_token_iterator &__rhs)
Copy constructs a regex_token_iterator.
Definition: regex.h:2722
static constexpr flag_type egrep
Definition: regex.h:414
size_type size() const
Gets the number of matches and submatches.
Definition: regex.h:1662
const_iterator end() const
Gets an iterator to one-past-the-end of the collection.
Definition: regex.h:1793
const_iterator begin() const
Gets an iterator to the start of the sub_match collection.
Definition: regex.h:1779
regex_iterator< wstring::const_iterator > wsregex_iterator
Token iterator for C-style NULL-terminated strings.
Definition: regex.h:2585
regex_token_iterator< wstring::const_iterator > wsregex_token_iterator
Token iterator for standard wide-character strings.
Definition: regex.h:2830
locale_type imbue(locale_type __loc)
Imbues the regular expression object with the given locale.
Definition: regex.h:718
_Out_iter format(_Out_iter __out, const char_type *__fmt_first, const char_type *__fmt_last, match_flag_type __flags=regex_constants::format_default) const
const_iterator cbegin() const
Gets an iterator to the start of the sub_match collection.
Definition: regex.h:1786
difference_type length(size_type __sub=0) const
Gets the length of the indicated submatch.
Definition: regex.h:1694
regex_traits()
Constructs a default traits object.
Definition: regex.h:158
const_reference prefix() const
Gets a sub_match representing the match prefix.
Definition: regex.h:1754
syntax_option_type
This is a bitmask type indicating how to interpret the regex.
basic_regex(const basic_regex &__rhs)=default
Copy-constructs a basic regular expression.
regex_token_iterator(_Bi_iter __a, _Bi_iter __b, const regex_type &__re, const std::vector< int > &__submatches, regex_constants::match_flag_type __m=regex_constants::match_default)
Definition: regex.h:2655
regex_token_iterator(_Bi_iter __a, _Bi_iter __b, const regex_type &__re, initializer_list< int > __submatches, regex_constants::match_flag_type __m=regex_constants::match_default)
Definition: regex.h:2672
int value(_Ch_type __ch, int __radix) const
Converts a digit to an int.
Definition: regex.tcc:341
regex_token_iterator< const wchar_t * > wcregex_token_iterator
Token iterator for C-style NULL-terminated wide strings.
Definition: regex.h:2827
basic_regex & assign(initializer_list< _Ch_type > __l, flag_type __flags=ECMAScript)
Assigns a new regular expression to a regex object.
Definition: regex.h:687
regex_iterator operator++(int)
Postincrements a regex_iterator.
Definition: regex.h:2566
void swap(basic_regex &__rhs)
Swaps the contents of two regular expression objects.
Definition: regex.h:740
basic_string< char_type, _St, _Sa > format(const basic_string< char_type, _St, _Sa > &__fmt, match_flag_type __flags=regex_constants::format_default) const
Definition: regex.h:1841
basic_regex & assign(basic_regex &&__rhs) noexcept
The move-assignment operator.
Definition: regex.h:595
const_reference operator[](size_type __sub) const
Gets a sub_match reference for the match or submatch.
Definition: regex.h:1737
static constexpr flag_type extended
Definition: regex.h:411
match_results(const _Alloc &__a=_Alloc())
Constructs a default match_results container.
Definition: regex.h:1605
unsigned int mark_count() const
Gets the number of marked subexpressions within the regular expression.
Definition: regex.h:696
bool operator!=(const regex_token_iterator &__rhs) const
Compares a regex_token_iterator to another for inequality.
Definition: regex.h:2744
regex_iterator(_Bi_iter __a, _Bi_iter __b, const regex_type &__re, regex_constants::match_flag_type __m=regex_constants::match_default)
Definition: regex.h:2504
regex_token_iterator operator++(int)
Postincrements a regex_token_iterator.
Definition: regex.h:2771
const value_type & operator*() const
Dereferences a regex_iterator.
Definition: regex.h:2546
const_iterator cend() const
Gets an iterator to one-past-the-end of the collection.
Definition: regex.h:1800
const value_type * operator->() const
Selects a regex_token_iterator member.
Definition: regex.h:2758
_Out_iter format(_Out_iter __out, const basic_string< char_type, _St, _Sa > &__fmt, match_flag_type __flags=regex_constants::format_default) const
Definition: regex.h:1829
match_results & operator=(const match_results &__rhs)=default
Assigns rhs to *this.
regex_token_iterator & operator=(const regex_token_iterator &__rhs)
Assigns a regex_token_iterator to another.
Definition: regex.tcc:578
_GLIBCXX17_INLINE constexpr syntax_option_type optimize
void swap(match_results &__that)
Swaps the contents of two match_results.
Definition: regex.h:1889
regex_iterator< string::const_iterator > sregex_iterator
Token iterator for C-style NULL-terminated strings.
Definition: regex.h:2582
regex_token_iterator & operator++()
Increments a regex_token_iterator.
Definition: regex.tcc:614
static constexpr flag_type awk
Definition: regex.h:412
basic_regex & assign(const basic_regex &__rhs)
the real assignment operator.
Definition: regex.h:582
static constexpr flag_type ECMAScript
Definition: regex.h:409
string_type str(size_type __sub=0) const
Gets the match or submatch converted to a string type.
Definition: regex.h:1722
regex_iterator< const wchar_t * > wcregex_iterator
Token iterator for C-style NULL-terminated strings.
Definition: regex.h:2584
~match_results()
Destroys a match_results object.
Definition: regex.h:1634
regex_token_iterator()
Default constructs a regex_token_iterator.
Definition: regex.h:2617
basic_regex< char > regex
Standard regular expressions.
Definition: regex.h:829
basic_regex(const _Ch_type *__p, flag_type __f=ECMAScript)
Constructs a basic regular expression from the sequence [__p, __p + char_traits<_Ch_type>::length(__p...
Definition: regex.h:438
_Out_iter regex_replace(_Out_iter __out, _Bi_iter __first, _Bi_iter __last, const basic_regex< _Ch_type, _Rx_traits > &__e, const basic_string< _Ch_type, _St, _Sa > &__fmt, regex_constants::match_flag_type __flags=regex_constants::match_default)
Search for a regular expression within a range for multiple times, and replace the matched parts thro...
Definition: regex.h:2331
int compare(const value_type *__s) const
Compares this sub_match to a C-style string.
Definition: regex.h:951
bool ready() const
Indicates if the match_results is ready.
Definition: regex.h:1645
static constexpr flag_type nosubs
Definition: regex.h:406
regex_iterator & operator=(const regex_iterator &__rhs)=default
Assigns one regex_iterator to another.
_GLIBCXX17_INLINE constexpr syntax_option_type collate
basic_regex(const std::basic_string< _Ch_type, _Ch_traits, _Ch_alloc > &__s, flag_type __f=ECMAScript)
Constructs a basic regular expression from the string s interpreted according to the flags in f.
Definition: regex.h:484
sub_match< const wchar_t * > wcsub_match
Regex submatch over a C-style null-terminated wide string.
Definition: regex.h:964
regex_token_iterator< string::const_iterator > sregex_token_iterator
Token iterator for standard strings.
Definition: regex.h:2823
allocator_type get_allocator() const
Gets a copy of the allocator.
Definition: regex.h:1875
bool regex_match(_Bi_iter __s, _Bi_iter __e, match_results< _Bi_iter, _Alloc > &__m, const basic_regex< _Ch_type, _Rx_traits > &__re, regex_constants::match_flag_type __flags=regex_constants::match_default)
Determines if there is a match between the regular expression e and all of the character sequence [fi...
Definition: regex.h:2025
char_type translate_nocase(char_type __c) const
Translates a character into a case-insensitive equivalent.
Definition: regex.h:195
match_flag_type
This is a bitmask type indicating regex matching rules.
const value_type * operator->() const
Selects a regex_iterator member.
Definition: regex.h:2553
const_reference suffix() const
Gets a sub_match representing the match suffix.
Definition: regex.h:1769
locale_type getloc() const
Gets the locale currently imbued in the regular expression object.
Definition: regex.h:730
static constexpr flag_type basic
Definition: regex.h:410
static constexpr flag_type grep
Definition: regex.h:413
basic_regex(_FwdIter __first, _FwdIter __last, flag_type __f=ECMAScript)
Constructs a basic regular expression from the range [first, last) interpreted according to the flags...
Definition: regex.h:504
size_type max_size() const
Gets the number of matches and submatches.
Definition: regex.h:1666
match_results & operator=(match_results &&__rhs)=default
Move-assigns rhs to *this.
static constexpr flag_type icase
Definition: regex.h:405
bool regex_search(_Bi_iter __s, _Bi_iter __e, match_results< _Bi_iter, _Alloc > &__m, const basic_regex< _Ch_type, _Rx_traits > &__re, regex_constants::match_flag_type __flags=regex_constants::match_default)
Definition: regex.h:2183
bool operator!=(const regex_iterator &__rhs) const
Tests the inequivalence of two regex iterators.
Definition: regex.h:2539
_GLIBCXX17_INLINE constexpr match_flag_type match_default
difference_type length() const
Definition: regex.h:882
string_type lookup_collatename(_Fwd_iter __first, _Fwd_iter __last) const
Gets a collation element by name.
Definition: regex.tcc:127
flag_type flags() const
Gets the flags used to construct the regular expression or in the last call to assign().
Definition: regex.h:708
basic_regex(const _Ch_type *__p, std::size_t __len, flag_type __f=ECMAScript)
Constructs a basic regular expression from the sequence [p, p + len) interpreted according to the fla...
Definition: regex.h:454
basic_regex & operator=(initializer_list< _Ch_type > __l)
Replaces a regular expression with a new one constructed from an initializer list.
Definition: regex.h:561
const value_type & operator*() const
Dereferences a regex_token_iterator.
Definition: regex.h:2751
regex_iterator< const char * > cregex_iterator
Token iterator for C-style NULL-terminated strings.
Definition: regex.h:2581
locale_type getloc() const
Gets a copy of the current locale in use by the regex_traits object.
Definition: regex.h:371
string_type format(const char_type *__fmt, match_flag_type __flags=regex_constants::format_default) const
Definition: regex.h:1853
string_type str() const
Gets the matching sequence as a string.
Definition: regex.h:908
regex_iterator(const regex_iterator &__rhs)=default
match_results(const match_results &__rhs)=default
Copy constructs a match_results.
bool isctype(_Ch_type __c, char_class_type __f) const
Determines if c is a member of an identified class.
Definition: regex.tcc:327
basic_regex & assign(const basic_string< _Ch_type, _Ch_traits, _Alloc > &__s, flag_type __flags=ECMAScript)
Assigns a new regular expression to a regex object from a string containing a regular expression patt...
Definition: regex.h:649
basic_regex & operator=(basic_regex &&__rhs) noexcept
Move-assigns one regular expression to another.
Definition: regex.h:538
basic_regex< wchar_t > wregex
Standard wide-character regular expressions.
Definition: regex.h:833
locale_type imbue(locale_type __loc)
Imbues the regex_traits object with a copy of a new locale.
Definition: regex.h:360
basic_regex(basic_regex &&__rhs) noexcept=default
Move-constructs a basic regular expression.
basic_regex(initializer_list< _Ch_type > __l, flag_type __f=ECMAScript)
Constructs a basic regular expression from an initializer list.
Definition: regex.h:517
basic_regex & operator=(const _Ch_type *__p)
Replaces a regular expression with a new one constructed from a C-style null-terminated string.
Definition: regex.h:549
char_class_type lookup_classname(_Fwd_iter __first, _Fwd_iter __last, bool __icase=false) const
Maps one or more characters to a named character classification.
Definition: regex.tcc:283
_GLIBCXX17_INLINE constexpr match_flag_type format_default
basic_regex & operator=(const basic_string< _Ch_type, _Ch_traits, _Alloc > &__s)
Replaces a regular expression with a new one constructed from a string.
Definition: regex.h:572
regex_iterator & operator++()
Increments a regex_iterator.
Definition: regex.tcc:519
int compare(const sub_match &__s) const
Compares this and another matched sequence.
Definition: regex.h:925
string_type transform(_Fwd_iter __first, _Fwd_iter __last) const
Gets a sort key for a character sequence.
Definition: regex.h:224
int compare(const string_type &__s) const
Compares this sub_match to a string.
Definition: regex.h:938
_GLIBCXX17_INLINE constexpr syntax_option_type extended
regex_token_iterator(_Bi_iter __a, _Bi_iter __b, const regex_type &__re, int __submatch=0, regex_constants::match_flag_type __m=regex_constants::match_default)
Definition: regex.h:2639
match_results(match_results &&__rhs) noexcept=default
Move constructs a match_results.
_GLIBCXX17_INLINE constexpr syntax_option_type ECMAScript
_GLIBCXX17_INLINE constexpr syntax_option_type grep
~basic_regex()
Destroys a basic regular expression.
Definition: regex.h:524
basic_regex & assign(const _Ch_type *__p, std::size_t __len, flag_type __flags)
Assigns a new regular expression to a regex object from a C-style string containing a regular express...
Definition: regex.h:633
static constexpr flag_type optimize
Definition: regex.h:407
back_insert_iterator< _Container > back_inserter(_Container &__x)
ISO C++ entities toplevel namespace is std.
constexpr const _Tp * begin(initializer_list< _Tp > __ils) noexcept
Return an iterator pointing to the first element of the initializer_list.
bitset< _Nb > operator&(const bitset< _Nb > &__x, const bitset< _Nb > &__y) noexcept
Global bitwise operations on bitsets.
Definition: bitset:1429
_GLIBCXX17_CONSTEXPR iterator_traits< _InputIterator >::difference_type distance(_InputIterator __first, _InputIterator __last)
A generalization of pointer arithmetic.
constexpr const _Tp * end(initializer_list< _Tp > __ils) noexcept
Return an iterator pointing to one past the last element of the initializer_list.
initializer_list
is_same
Definition: type_traits:1280
typename _Size< _Alloc, difference_type >::type size_type
The allocator's size type.
Managing sequences of characters and character-like objects.
const _CharT * data() const noexcept
Return const pointer to contents.
int compare(const basic_string &__str) const
Compare to a string.
size_type length() const noexcept
Returns the number of characters in the string, not including any null-termination.
size_type size() const noexcept
Returns the number of characters in the string, not including any null-termination.
const _CharT * c_str() const noexcept
Return const pointer to null-terminated contents.
Basis for explicit traits specializations.
Definition: char_traits.h:272
Container class for localization functionality.
Facet for localized string comparison.
Primary class template ctype facet.
The results of a match or search operation.
Definition: regex.h:1555
Takes a regex and an input string and does the matching.
Describes aspects of a regular expression.
Definition: regex.h:82
A smart pointer with reference-counted copy semantics.
Forward iterators support a superset of input iterator operations.
Struct holding two objects of arbitrary type.
Definition: stl_pair.h:210
_BiIter first
second_type is the second bound type
Definition: stl_pair.h:214
_BiIter second
first is a copy of the first object
Definition: stl_pair.h:215
A standard container which offers fixed time access to individual elements in any order.
Definition: stl_vector.h:340
void resize(size_type __new_size)
Resizes the vector to the specified number of elements.
Definition: stl_vector.h:824
_Tp * data() noexcept
Definition: stl_vector.h:1055
bool empty() const noexcept
Definition: stl_vector.h:894
allocator_type get_allocator() const noexcept
Get a copy of the memory allocation object.
Definition: stl_vector.h:245
size_type max_size() const noexcept
Definition: stl_vector.h:810
void swap(vector &__x) noexcept
Swaps data with another vector.
Definition: stl_vector.h:1367
iterator begin() noexcept
Definition: stl_vector.h:698
iterator end() noexcept
Definition: stl_vector.h:716
size_type size() const noexcept
Definition: stl_vector.h:805
reference operator[](size_type __n) noexcept
Subscript access to the data contained in the vector.
Definition: stl_vector.h:930