libstdc++
regex.h
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1 // class template regex -*- C++ -*-
2 
3 // Copyright (C) 2010-2014 Free Software Foundation, Inc.
4 //
5 // This file is part of the GNU ISO C++ Library. This library is free
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7 // terms of the GNU General Public License as published by the
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10 
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15 
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18 // 3.1, as published by the Free Software Foundation.
19 
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24 
25 /**
26  * @file bits/regex.h
27  * This is an internal header file, included by other library headers.
28  * Do not attempt to use it directly. @headername{regex}
29  */
30 
31 namespace std _GLIBCXX_VISIBILITY(default)
32 {
33 namespace __detail
34 {
35 _GLIBCXX_BEGIN_NAMESPACE_VERSION
36 
37  enum class _RegexExecutorPolicy : int
38  { _S_auto, _S_alternate };
39 
40  template<typename _BiIter, typename _Alloc,
41  typename _CharT, typename _TraitsT,
42  _RegexExecutorPolicy __policy,
43  bool __match_mode>
44  bool
45  __regex_algo_impl(_BiIter __s,
46  _BiIter __e,
47  match_results<_BiIter, _Alloc>& __m,
48  const basic_regex<_CharT, _TraitsT>& __re,
50 
51 _GLIBCXX_END_NAMESPACE_VERSION
52 }
53 
54 _GLIBCXX_BEGIN_NAMESPACE_VERSION
55 
56  /**
57  * @addtogroup regex
58  * @{
59  */
60 
61  /**
62  * @brief Class regex_traits. Describes aspects of a regular expression.
63  *
64  * A regular expression traits class that satisfies the requirements of
65  * section [28.7].
66  *
67  * The class %regex is parameterized around a set of related types and
68  * functions used to complete the definition of its semantics. This class
69  * satisfies the requirements of such a traits class.
70  */
71  template<typename _Ch_type>
72  struct regex_traits
73  {
74  public:
75  typedef _Ch_type char_type;
77  typedef std::locale locale_type;
78  private:
79  struct _RegexMask
80  {
81  typedef typename std::ctype<char_type>::mask _BaseType;
82  _BaseType _M_base;
83  unsigned char _M_extended;
84  static constexpr unsigned char _S_under = 1 << 0;
85  // FIXME: _S_blank should be removed in the future,
86  // when locale's complete.
87  static constexpr unsigned char _S_blank = 1 << 1;
88  static constexpr unsigned char _S_valid_mask = 0x3;
89 
90  constexpr _RegexMask(_BaseType __base = 0,
91  unsigned char __extended = 0)
92  : _M_base(__base), _M_extended(__extended)
93  { }
94 
95  constexpr _RegexMask
96  operator&(_RegexMask __other) const
97  {
98  return _RegexMask(_M_base & __other._M_base,
99  _M_extended & __other._M_extended);
100  }
101 
102  constexpr _RegexMask
103  operator|(_RegexMask __other) const
104  {
105  return _RegexMask(_M_base | __other._M_base,
106  _M_extended | __other._M_extended);
107  }
108 
109  constexpr _RegexMask
110  operator^(_RegexMask __other) const
111  {
112  return _RegexMask(_M_base ^ __other._M_base,
113  _M_extended ^ __other._M_extended);
114  }
115 
116  constexpr _RegexMask
117  operator~() const
118  { return _RegexMask(~_M_base, ~_M_extended); }
119 
120  _RegexMask&
121  operator&=(_RegexMask __other)
122  { return *this = (*this) & __other; }
123 
124  _RegexMask&
125  operator|=(_RegexMask __other)
126  { return *this = (*this) | __other; }
127 
128  _RegexMask&
129  operator^=(_RegexMask __other)
130  { return *this = (*this) ^ __other; }
131 
132  constexpr bool
133  operator==(_RegexMask __other) const
134  {
135  return (_M_extended & _S_valid_mask)
136  == (__other._M_extended & _S_valid_mask)
137  && _M_base == __other._M_base;
138  }
139 
140  constexpr bool
141  operator!=(_RegexMask __other) const
142  { return !((*this) == __other); }
143 
144  };
145  public:
146  typedef _RegexMask char_class_type;
147 
148  public:
149  /**
150  * @brief Constructs a default traits object.
151  */
153 
154  /**
155  * @brief Gives the length of a C-style string starting at @p __p.
156  *
157  * @param __p a pointer to the start of a character sequence.
158  *
159  * @returns the number of characters between @p *__p and the first
160  * default-initialized value of type @p char_type. In other words, uses
161  * the C-string algorithm for determining the length of a sequence of
162  * characters.
163  */
164  static std::size_t
165  length(const char_type* __p)
166  { return string_type::traits_type::length(__p); }
167 
168  /**
169  * @brief Performs the identity translation.
170  *
171  * @param __c A character to the locale-specific character set.
172  *
173  * @returns __c.
174  */
175  char_type
176  translate(char_type __c) const
177  { return __c; }
178 
179  /**
180  * @brief Translates a character into a case-insensitive equivalent.
181  *
182  * @param __c A character to the locale-specific character set.
183  *
184  * @returns the locale-specific lower-case equivalent of __c.
185  * @throws std::bad_cast if the imbued locale does not support the ctype
186  * facet.
187  */
188  char_type
189  translate_nocase(char_type __c) const
190  {
191  typedef std::ctype<char_type> __ctype_type;
192  const __ctype_type& __fctyp(use_facet<__ctype_type>(_M_locale));
193  return __fctyp.tolower(__c);
194  }
195 
196  /**
197  * @brief Gets a sort key for a character sequence.
198  *
199  * @param __first beginning of the character sequence.
200  * @param __last one-past-the-end of the character sequence.
201  *
202  * Returns a sort key for the character sequence designated by the
203  * iterator range [F1, F2) such that if the character sequence [G1, G2)
204  * sorts before the character sequence [H1, H2) then
205  * v.transform(G1, G2) < v.transform(H1, H2).
206  *
207  * What this really does is provide a more efficient way to compare a
208  * string to multiple other strings in locales with fancy collation
209  * rules and equivalence classes.
210  *
211  * @returns a locale-specific sort key equivalent to the input range.
212  *
213  * @throws std::bad_cast if the current locale does not have a collate
214  * facet.
215  */
216  template<typename _Fwd_iter>
217  string_type
218  transform(_Fwd_iter __first, _Fwd_iter __last) const
219  {
220  typedef std::collate<char_type> __collate_type;
221  const __collate_type& __fclt(use_facet<__collate_type>(_M_locale));
222  string_type __s(__first, __last);
223  return __fclt.transform(__s.data(), __s.data() + __s.size());
224  }
225 
226  /**
227  * @brief Gets a sort key for a character sequence, independent of case.
228  *
229  * @param __first beginning of the character sequence.
230  * @param __last one-past-the-end of the character sequence.
231  *
232  * Effects: if typeid(use_facet<collate<_Ch_type> >) ==
233  * typeid(collate_byname<_Ch_type>) and the form of the sort key
234  * returned by collate_byname<_Ch_type>::transform(__first, __last)
235  * is known and can be converted into a primary sort key
236  * then returns that key, otherwise returns an empty string.
237  *
238  * @todo Implement this function correctly.
239  */
240  template<typename _Fwd_iter>
241  string_type
242  transform_primary(_Fwd_iter __first, _Fwd_iter __last) const
243  {
244  // TODO : this is not entirely correct.
245  // This function requires extra support from the platform.
246  //
247  // Read http://gcc.gnu.org/ml/libstdc++/2013-09/msg00117.html and
248  // http://www.open-std.org/Jtc1/sc22/wg21/docs/papers/2003/n1429.htm
249  // for details.
250  typedef std::ctype<char_type> __ctype_type;
251  const __ctype_type& __fctyp(use_facet<__ctype_type>(_M_locale));
252  std::vector<char_type> __s(__first, __last);
253  __fctyp.tolower(__s.data(), __s.data() + __s.size());
254  return this->transform(__s.data(), __s.data() + __s.size());
255  }
256 
257  /**
258  * @brief Gets a collation element by name.
259  *
260  * @param __first beginning of the collation element name.
261  * @param __last one-past-the-end of the collation element name.
262  *
263  * @returns a sequence of one or more characters that represents the
264  * collating element consisting of the character sequence designated by
265  * the iterator range [__first, __last). Returns an empty string if the
266  * character sequence is not a valid collating element.
267  */
268  template<typename _Fwd_iter>
269  string_type
270  lookup_collatename(_Fwd_iter __first, _Fwd_iter __last) const;
271 
272  /**
273  * @brief Maps one or more characters to a named character
274  * classification.
275  *
276  * @param __first beginning of the character sequence.
277  * @param __last one-past-the-end of the character sequence.
278  * @param __icase ignores the case of the classification name.
279  *
280  * @returns an unspecified value that represents the character
281  * classification named by the character sequence designated by
282  * the iterator range [__first, __last). If @p icase is true,
283  * the returned mask identifies the classification regardless of
284  * the case of the characters to be matched (for example,
285  * [[:lower:]] is the same as [[:alpha:]]), otherwise a
286  * case-dependent classification is returned. The value
287  * returned shall be independent of the case of the characters
288  * in the character sequence. If the name is not recognized then
289  * returns a value that compares equal to 0.
290  *
291  * At least the following names (or their wide-character equivalent) are
292  * supported.
293  * - d
294  * - w
295  * - s
296  * - alnum
297  * - alpha
298  * - blank
299  * - cntrl
300  * - digit
301  * - graph
302  * - lower
303  * - print
304  * - punct
305  * - space
306  * - upper
307  * - xdigit
308  */
309  template<typename _Fwd_iter>
310  char_class_type
311  lookup_classname(_Fwd_iter __first, _Fwd_iter __last,
312  bool __icase = false) const;
313 
314  /**
315  * @brief Determines if @p c is a member of an identified class.
316  *
317  * @param __c a character.
318  * @param __f a class type (as returned from lookup_classname).
319  *
320  * @returns true if the character @p __c is a member of the classification
321  * represented by @p __f, false otherwise.
322  *
323  * @throws std::bad_cast if the current locale does not have a ctype
324  * facet.
325  */
326  bool
327  isctype(_Ch_type __c, char_class_type __f) const;
328 
329  /**
330  * @brief Converts a digit to an int.
331  *
332  * @param __ch a character representing a digit.
333  * @param __radix the radix if the numeric conversion (limited to 8, 10,
334  * or 16).
335  *
336  * @returns the value represented by the digit __ch in base radix if the
337  * character __ch is a valid digit in base radix; otherwise returns -1.
338  */
339  int
340  value(_Ch_type __ch, int __radix) const;
341 
342  /**
343  * @brief Imbues the regex_traits object with a copy of a new locale.
344  *
345  * @param __loc A locale.
346  *
347  * @returns a copy of the previous locale in use by the regex_traits
348  * object.
349  *
350  * @note Calling imbue with a different locale than the one currently in
351  * use invalidates all cached data held by *this.
352  */
353  locale_type
355  {
356  std::swap(_M_locale, __loc);
357  return __loc;
358  }
359 
360  /**
361  * @brief Gets a copy of the current locale in use by the regex_traits
362  * object.
363  */
364  locale_type
365  getloc() const
366  { return _M_locale; }
367 
368  protected:
369  locale_type _M_locale;
370  };
371 
372  // [7.8] Class basic_regex
373  /**
374  * Objects of specializations of this class represent regular expressions
375  * constructed from sequences of character type @p _Ch_type.
376  *
377  * Storage for the regular expression is allocated and deallocated as
378  * necessary by the member functions of this class.
379  */
380  template<typename _Ch_type, typename _Rx_traits = regex_traits<_Ch_type>>
382  {
383  public:
384  static_assert(is_same<_Ch_type, typename _Rx_traits::char_type>::value,
385  "regex traits class must have the same char_type");
386 
387  // types:
388  typedef _Ch_type value_type;
389  typedef _Rx_traits traits_type;
390  typedef typename traits_type::string_type string_type;
392  typedef typename traits_type::locale_type locale_type;
393 
394  /**
395  * @name Constants
396  * std [28.8.1](1)
397  */
398  //@{
399  static constexpr flag_type icase = regex_constants::icase;
400  static constexpr flag_type nosubs = regex_constants::nosubs;
401  static constexpr flag_type optimize = regex_constants::optimize;
402  static constexpr flag_type collate = regex_constants::collate;
403  static constexpr flag_type ECMAScript = regex_constants::ECMAScript;
404  static constexpr flag_type basic = regex_constants::basic;
405  static constexpr flag_type extended = regex_constants::extended;
406  static constexpr flag_type awk = regex_constants::awk;
407  static constexpr flag_type grep = regex_constants::grep;
408  static constexpr flag_type egrep = regex_constants::egrep;
409  //@}
410 
411  // [7.8.2] construct/copy/destroy
412  /**
413  * Constructs a basic regular expression that does not match any
414  * character sequence.
415  */
417  : _M_flags(ECMAScript), _M_automaton(nullptr)
418  { }
419 
420  /**
421  * @brief Constructs a basic regular expression from the
422  * sequence [__p, __p + char_traits<_Ch_type>::length(__p))
423  * interpreted according to the flags in @p __f.
424  *
425  * @param __p A pointer to the start of a C-style null-terminated string
426  * containing a regular expression.
427  * @param __f Flags indicating the syntax rules and options.
428  *
429  * @throws regex_error if @p __p is not a valid regular expression.
430  */
431  explicit
432  basic_regex(const _Ch_type* __p, flag_type __f = ECMAScript)
433  : basic_regex(__p, __p + _Rx_traits::length(__p), __f)
434  { }
435 
436  /**
437  * @brief Constructs a basic regular expression from the sequence
438  * [p, p + len) interpreted according to the flags in @p f.
439  *
440  * @param __p A pointer to the start of a string containing a regular
441  * expression.
442  * @param __len The length of the string containing the regular
443  * expression.
444  * @param __f Flags indicating the syntax rules and options.
445  *
446  * @throws regex_error if @p __p is not a valid regular expression.
447  */
448  basic_regex(const _Ch_type* __p, std::size_t __len,
449  flag_type __f = ECMAScript)
450  : basic_regex(__p, __p + __len, __f)
451  { }
452 
453  /**
454  * @brief Copy-constructs a basic regular expression.
455  *
456  * @param __rhs A @p regex object.
457  */
458  basic_regex(const basic_regex& __rhs) = default;
459 
460  /**
461  * @brief Move-constructs a basic regular expression.
462  *
463  * @param __rhs A @p regex object.
464  */
465  basic_regex(const basic_regex&& __rhs) noexcept
466  : _M_flags(__rhs._M_flags), _M_traits(__rhs._M_traits),
467  _M_automaton(std::move(__rhs._M_automaton))
468  { }
469 
470  /**
471  * @brief Constructs a basic regular expression from the string
472  * @p s interpreted according to the flags in @p f.
473  *
474  * @param __s A string containing a regular expression.
475  * @param __f Flags indicating the syntax rules and options.
476  *
477  * @throws regex_error if @p __s is not a valid regular expression.
478  */
479  template<typename _Ch_traits, typename _Ch_alloc>
480  explicit
481  basic_regex(const std::basic_string<_Ch_type, _Ch_traits,
482  _Ch_alloc>& __s,
483  flag_type __f = ECMAScript)
484  : basic_regex(__s.begin(), __s.end(), __f)
485  { }
486 
487  /**
488  * @brief Constructs a basic regular expression from the range
489  * [first, last) interpreted according to the flags in @p f.
490  *
491  * @param __first The start of a range containing a valid regular
492  * expression.
493  * @param __last The end of a range containing a valid regular
494  * expression.
495  * @param __f The format flags of the regular expression.
496  *
497  * @throws regex_error if @p [__first, __last) is not a valid regular
498  * expression.
499  */
500  template<typename _FwdIter>
501  basic_regex(_FwdIter __first, _FwdIter __last,
502  flag_type __f = ECMAScript)
503  : _M_flags(__f),
504  _M_automaton(__detail::__compile_nfa(__first, __last, _M_traits,
505  _M_flags))
506  { }
507 
508  /**
509  * @brief Constructs a basic regular expression from an initializer list.
510  *
511  * @param __l The initializer list.
512  * @param __f The format flags of the regular expression.
513  *
514  * @throws regex_error if @p __l is not a valid regular expression.
515  */
517  : basic_regex(__l.begin(), __l.end(), __f)
518  { }
519 
520  /**
521  * @brief Destroys a basic regular expression.
522  */
524  { }
525 
526  /**
527  * @brief Assigns one regular expression to another.
528  */
529  basic_regex&
530  operator=(const basic_regex& __rhs)
531  { return this->assign(__rhs); }
532 
533  /**
534  * @brief Move-assigns one regular expression to another.
535  */
536  basic_regex&
537  operator=(basic_regex&& __rhs) noexcept
538  { return this->assign(std::move(__rhs)); }
539 
540  /**
541  * @brief Replaces a regular expression with a new one constructed from
542  * a C-style null-terminated string.
543  *
544  * @param __p A pointer to the start of a null-terminated C-style string
545  * containing a regular expression.
546  */
547  basic_regex&
548  operator=(const _Ch_type* __p)
549  { return this->assign(__p, flags()); }
550 
551  /**
552  * @brief Replaces a regular expression with a new one constructed from
553  * a string.
554  *
555  * @param __s A pointer to a string containing a regular expression.
556  */
557  template<typename _Ch_typeraits, typename _Alloc>
558  basic_regex&
560  { return this->assign(__s, flags()); }
561 
562  // [7.8.3] assign
563  /**
564  * @brief the real assignment operator.
565  *
566  * @param __rhs Another regular expression object.
567  */
568  basic_regex&
569  assign(const basic_regex& __rhs)
570  {
571  basic_regex __tmp(__rhs);
572  this->swap(__tmp);
573  return *this;
574  }
575 
576  /**
577  * @brief The move-assignment operator.
578  *
579  * @param __rhs Another regular expression object.
580  */
581  basic_regex&
582  assign(basic_regex&& __rhs) noexcept
583  {
584  basic_regex __tmp(std::move(__rhs));
585  this->swap(__tmp);
586  return *this;
587  }
588 
589  /**
590  * @brief Assigns a new regular expression to a regex object from a
591  * C-style null-terminated string containing a regular expression
592  * pattern.
593  *
594  * @param __p A pointer to a C-style null-terminated string containing
595  * a regular expression pattern.
596  * @param __flags Syntax option flags.
597  *
598  * @throws regex_error if __p does not contain a valid regular
599  * expression pattern interpreted according to @p __flags. If
600  * regex_error is thrown, *this remains unchanged.
601  */
602  basic_regex&
603  assign(const _Ch_type* __p, flag_type __flags = ECMAScript)
604  { return this->assign(string_type(__p), __flags); }
605 
606  /**
607  * @brief Assigns a new regular expression to a regex object from a
608  * C-style string containing a regular expression pattern.
609  *
610  * @param __p A pointer to a C-style string containing a
611  * regular expression pattern.
612  * @param __len The length of the regular expression pattern string.
613  * @param __flags Syntax option flags.
614  *
615  * @throws regex_error if p does not contain a valid regular
616  * expression pattern interpreted according to @p __flags. If
617  * regex_error is thrown, *this remains unchanged.
618  */
619  basic_regex&
620  assign(const _Ch_type* __p, std::size_t __len, flag_type __flags)
621  { return this->assign(string_type(__p, __len), __flags); }
622 
623  /**
624  * @brief Assigns a new regular expression to a regex object from a
625  * string containing a regular expression pattern.
626  *
627  * @param __s A string containing a regular expression pattern.
628  * @param __flags Syntax option flags.
629  *
630  * @throws regex_error if __s does not contain a valid regular
631  * expression pattern interpreted according to @p __flags. If
632  * regex_error is thrown, *this remains unchanged.
633  */
634  template<typename _Ch_typeraits, typename _Alloc>
635  basic_regex&
637  flag_type __flags = ECMAScript)
638  {
639  _M_flags = __flags;
640  _M_automaton = __detail::__compile_nfa(__s.begin(), __s.end(),
641  _M_traits, _M_flags);
642  return *this;
643  }
644 
645  /**
646  * @brief Assigns a new regular expression to a regex object.
647  *
648  * @param __first The start of a range containing a valid regular
649  * expression.
650  * @param __last The end of a range containing a valid regular
651  * expression.
652  * @param __flags Syntax option flags.
653  *
654  * @throws regex_error if p does not contain a valid regular
655  * expression pattern interpreted according to @p __flags. If
656  * regex_error is thrown, the object remains unchanged.
657  */
658  template<typename _InputIterator>
659  basic_regex&
660  assign(_InputIterator __first, _InputIterator __last,
661  flag_type __flags = ECMAScript)
662  { return this->assign(string_type(__first, __last), __flags); }
663 
664  /**
665  * @brief Assigns a new regular expression to a regex object.
666  *
667  * @param __l An initializer list representing a regular expression.
668  * @param __flags Syntax option flags.
669  *
670  * @throws regex_error if @p __l does not contain a valid
671  * regular expression pattern interpreted according to @p
672  * __flags. If regex_error is thrown, the object remains
673  * unchanged.
674  */
675  basic_regex&
676  assign(initializer_list<_Ch_type> __l, flag_type __flags = ECMAScript)
677  { return this->assign(__l.begin(), __l.end(), __flags); }
678 
679  // [7.8.4] const operations
680  /**
681  * @brief Gets the number of marked subexpressions within the regular
682  * expression.
683  */
684  unsigned int
685  mark_count() const
686  { return _M_automaton->_M_sub_count() - 1; }
687 
688  /**
689  * @brief Gets the flags used to construct the regular expression
690  * or in the last call to assign().
691  */
692  flag_type
693  flags() const
694  { return _M_flags; }
695 
696  // [7.8.5] locale
697  /**
698  * @brief Imbues the regular expression object with the given locale.
699  *
700  * @param __loc A locale.
701  */
702  locale_type
703  imbue(locale_type __loc)
704  { return _M_traits.imbue(__loc); }
705 
706  /**
707  * @brief Gets the locale currently imbued in the regular expression
708  * object.
709  */
710  locale_type
711  getloc() const
712  { return _M_traits.getloc(); }
713 
714  // [7.8.6] swap
715  /**
716  * @brief Swaps the contents of two regular expression objects.
717  *
718  * @param __rhs Another regular expression object.
719  */
720  void
722  {
723  std::swap(_M_flags, __rhs._M_flags);
724  std::swap(_M_traits, __rhs._M_traits);
725  std::swap(_M_automaton, __rhs._M_automaton);
726  }
727 
728 #ifdef _GLIBCXX_DEBUG
729  void
730  _M_dot(std::ostream& __ostr)
731  { _M_automaton->_M_dot(__ostr); }
732 #endif
733 
734  protected:
735  typedef std::shared_ptr<__detail::_NFA<_Rx_traits>> _AutomatonPtr;
736 
737  template<typename _Bp, typename _Ap, typename _Cp, typename _Rp,
738  __detail::_RegexExecutorPolicy, bool>
739  friend bool
740  __detail::__regex_algo_impl(_Bp, _Bp, match_results<_Bp, _Ap>&,
741  const basic_regex<_Cp, _Rp>&,
743 
744  template<typename, typename, typename, bool>
745  friend class __detail::_Executor;
746 
747  flag_type _M_flags;
748  _Rx_traits _M_traits;
749  _AutomatonPtr _M_automaton;
750  };
751 
752  /** @brief Standard regular expressions. */
754 
755 #ifdef _GLIBCXX_USE_WCHAR_T
756  /** @brief Standard wide-character regular expressions. */
758 #endif
759 
760 
761  // [7.8.6] basic_regex swap
762  /**
763  * @brief Swaps the contents of two regular expression objects.
764  * @param __lhs First regular expression.
765  * @param __rhs Second regular expression.
766  */
767  template<typename _Ch_type, typename _Rx_traits>
768  inline void
771  { __lhs.swap(__rhs); }
772 
773 
774  // [7.9] Class template sub_match
775  /**
776  * A sequence of characters matched by a particular marked sub-expression.
777  *
778  * An object of this class is essentially a pair of iterators marking a
779  * matched subexpression within a regular expression pattern match. Such
780  * objects can be converted to and compared with std::basic_string objects
781  * of a similar base character type as the pattern matched by the regular
782  * expression.
783  *
784  * The iterators that make up the pair are the usual half-open interval
785  * referencing the actual original pattern matched.
786  */
787  template<typename _BiIter>
788  class sub_match : public std::pair<_BiIter, _BiIter>
789  {
790  typedef iterator_traits<_BiIter> __iter_traits;
791 
792  public:
793  typedef typename __iter_traits::value_type value_type;
794  typedef typename __iter_traits::difference_type difference_type;
795  typedef _BiIter iterator;
797 
798  bool matched;
799 
800  constexpr sub_match() : matched() { }
801 
802  /**
803  * Gets the length of the matching sequence.
804  */
805  difference_type
806  length() const
807  { return this->matched ? std::distance(this->first, this->second) : 0; }
808 
809  /**
810  * @brief Gets the matching sequence as a string.
811  *
812  * @returns the matching sequence as a string.
813  *
814  * This is the implicit conversion operator. It is identical to the
815  * str() member function except that it will want to pop up in
816  * unexpected places and cause a great deal of confusion and cursing
817  * from the unwary.
818  */
819  operator string_type() const
820  {
821  return this->matched
822  ? string_type(this->first, this->second)
823  : string_type();
824  }
825 
826  /**
827  * @brief Gets the matching sequence as a string.
828  *
829  * @returns the matching sequence as a string.
830  */
831  string_type
832  str() const
833  {
834  return this->matched
835  ? string_type(this->first, this->second)
836  : string_type();
837  }
838 
839  /**
840  * @brief Compares this and another matched sequence.
841  *
842  * @param __s Another matched sequence to compare to this one.
843  *
844  * @retval <0 this matched sequence will collate before @p __s.
845  * @retval =0 this matched sequence is equivalent to @p __s.
846  * @retval <0 this matched sequence will collate after @p __s.
847  */
848  int
849  compare(const sub_match& __s) const
850  { return this->str().compare(__s.str()); }
851 
852  /**
853  * @brief Compares this sub_match to a string.
854  *
855  * @param __s A string to compare to this sub_match.
856  *
857  * @retval <0 this matched sequence will collate before @p __s.
858  * @retval =0 this matched sequence is equivalent to @p __s.
859  * @retval <0 this matched sequence will collate after @p __s.
860  */
861  int
862  compare(const string_type& __s) const
863  { return this->str().compare(__s); }
864 
865  /**
866  * @brief Compares this sub_match to a C-style string.
867  *
868  * @param __s A C-style string to compare to this sub_match.
869  *
870  * @retval <0 this matched sequence will collate before @p __s.
871  * @retval =0 this matched sequence is equivalent to @p __s.
872  * @retval <0 this matched sequence will collate after @p __s.
873  */
874  int
875  compare(const value_type* __s) const
876  { return this->str().compare(__s); }
877  };
878 
879 
880  /** @brief Standard regex submatch over a C-style null-terminated string. */
882 
883  /** @brief Standard regex submatch over a standard string. */
885 
886 #ifdef _GLIBCXX_USE_WCHAR_T
887  /** @brief Regex submatch over a C-style null-terminated wide string. */
889 
890  /** @brief Regex submatch over a standard wide string. */
892 #endif
893 
894  // [7.9.2] sub_match non-member operators
895 
896  /**
897  * @brief Tests the equivalence of two regular expression submatches.
898  * @param __lhs First regular expression submatch.
899  * @param __rhs Second regular expression submatch.
900  * @returns true if @a __lhs is equivalent to @a __rhs, false otherwise.
901  */
902  template<typename _BiIter>
903  inline bool
904  operator==(const sub_match<_BiIter>& __lhs, const sub_match<_BiIter>& __rhs)
905  { return __lhs.compare(__rhs) == 0; }
906 
907  /**
908  * @brief Tests the inequivalence of two regular expression submatches.
909  * @param __lhs First regular expression submatch.
910  * @param __rhs Second regular expression submatch.
911  * @returns true if @a __lhs is not equivalent to @a __rhs, false otherwise.
912  */
913  template<typename _BiIter>
914  inline bool
915  operator!=(const sub_match<_BiIter>& __lhs, const sub_match<_BiIter>& __rhs)
916  { return __lhs.compare(__rhs) != 0; }
917 
918  /**
919  * @brief Tests the ordering of two regular expression submatches.
920  * @param __lhs First regular expression submatch.
921  * @param __rhs Second regular expression submatch.
922  * @returns true if @a __lhs precedes @a __rhs, false otherwise.
923  */
924  template<typename _BiIter>
925  inline bool
926  operator<(const sub_match<_BiIter>& __lhs, const sub_match<_BiIter>& __rhs)
927  { return __lhs.compare(__rhs) < 0; }
928 
929  /**
930  * @brief Tests the ordering of two regular expression submatches.
931  * @param __lhs First regular expression submatch.
932  * @param __rhs Second regular expression submatch.
933  * @returns true if @a __lhs does not succeed @a __rhs, false otherwise.
934  */
935  template<typename _BiIter>
936  inline bool
937  operator<=(const sub_match<_BiIter>& __lhs, const sub_match<_BiIter>& __rhs)
938  { return __lhs.compare(__rhs) <= 0; }
939 
940  /**
941  * @brief Tests the ordering of two regular expression submatches.
942  * @param __lhs First regular expression submatch.
943  * @param __rhs Second regular expression submatch.
944  * @returns true if @a __lhs does not precede @a __rhs, false otherwise.
945  */
946  template<typename _BiIter>
947  inline bool
948  operator>=(const sub_match<_BiIter>& __lhs, const sub_match<_BiIter>& __rhs)
949  { return __lhs.compare(__rhs) >= 0; }
950 
951  /**
952  * @brief Tests the ordering of two regular expression submatches.
953  * @param __lhs First regular expression submatch.
954  * @param __rhs Second regular expression submatch.
955  * @returns true if @a __lhs succeeds @a __rhs, false otherwise.
956  */
957  template<typename _BiIter>
958  inline bool
959  operator>(const sub_match<_BiIter>& __lhs, const sub_match<_BiIter>& __rhs)
960  { return __lhs.compare(__rhs) > 0; }
961 
962  // Alias for sub_match'd string.
963  template<typename _Bi_iter, typename _Ch_traits, typename _Ch_alloc>
964  using __sub_match_string = basic_string<
965  typename iterator_traits<_Bi_iter>::value_type,
966  _Ch_traits, _Ch_alloc>;
967 
968  /**
969  * @brief Tests the equivalence of a string and a regular expression
970  * submatch.
971  * @param __lhs A string.
972  * @param __rhs A regular expression submatch.
973  * @returns true if @a __lhs is equivalent to @a __rhs, false otherwise.
974  */
975  template<typename _Bi_iter, typename _Ch_traits, typename _Ch_alloc>
976  inline bool
978  const sub_match<_Bi_iter>& __rhs)
979  { return __rhs.compare(__lhs.c_str()) == 0; }
980 
981  /**
982  * @brief Tests the inequivalence of a string and a regular expression
983  * submatch.
984  * @param __lhs A string.
985  * @param __rhs A regular expression submatch.
986  * @returns true if @a __lhs is not equivalent to @a __rhs, false otherwise.
987  */
988  template<typename _Bi_iter, typename _Ch_traits, typename _Ch_alloc>
989  inline bool
991  const sub_match<_Bi_iter>& __rhs)
992  { return !(__lhs == __rhs); }
993 
994  /**
995  * @brief Tests the ordering of a string and a regular expression submatch.
996  * @param __lhs A string.
997  * @param __rhs A regular expression submatch.
998  * @returns true if @a __lhs precedes @a __rhs, false otherwise.
999  */
1000  template<typename _Bi_iter, typename _Ch_traits, typename _Ch_alloc>
1001  inline bool
1002  operator<(const __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>& __lhs,
1003  const sub_match<_Bi_iter>& __rhs)
1004  { return __rhs.compare(__lhs.c_str()) > 0; }
1005 
1006  /**
1007  * @brief Tests the ordering of a string and a regular expression submatch.
1008  * @param __lhs A string.
1009  * @param __rhs A regular expression submatch.
1010  * @returns true if @a __lhs succeeds @a __rhs, false otherwise.
1011  */
1012  template<typename _Bi_iter, typename _Ch_traits, typename _Ch_alloc>
1013  inline bool
1015  const sub_match<_Bi_iter>& __rhs)
1016  { return __rhs < __lhs; }
1017 
1018  /**
1019  * @brief Tests the ordering of a string and a regular expression submatch.
1020  * @param __lhs A string.
1021  * @param __rhs A regular expression submatch.
1022  * @returns true if @a __lhs does not precede @a __rhs, false otherwise.
1023  */
1024  template<typename _Bi_iter, typename _Ch_traits, typename _Ch_alloc>
1025  inline bool
1027  const sub_match<_Bi_iter>& __rhs)
1028  { return !(__lhs < __rhs); }
1029 
1030  /**
1031  * @brief Tests the ordering of a string and a regular expression submatch.
1032  * @param __lhs A string.
1033  * @param __rhs A regular expression submatch.
1034  * @returns true if @a __lhs does not succeed @a __rhs, false otherwise.
1035  */
1036  template<typename _Bi_iter, typename _Ch_traits, typename _Ch_alloc>
1037  inline bool
1038  operator<=(const __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>& __lhs,
1039  const sub_match<_Bi_iter>& __rhs)
1040  { return !(__rhs < __lhs); }
1041 
1042  /**
1043  * @brief Tests the equivalence of a regular expression submatch and a
1044  * string.
1045  * @param __lhs A regular expression submatch.
1046  * @param __rhs A string.
1047  * @returns true if @a __lhs is equivalent to @a __rhs, false otherwise.
1048  */
1049  template<typename _Bi_iter, typename _Ch_traits, typename _Ch_alloc>
1050  inline bool
1051  operator==(const sub_match<_Bi_iter>& __lhs,
1053  { return __lhs.compare(__rhs.c_str()) == 0; }
1054 
1055  /**
1056  * @brief Tests the inequivalence of a regular expression submatch and a
1057  * string.
1058  * @param __lhs A regular expression submatch.
1059  * @param __rhs A string.
1060  * @returns true if @a __lhs is not equivalent to @a __rhs, false otherwise.
1061  */
1062  template<typename _Bi_iter, typename _Ch_traits, typename _Ch_alloc>
1063  inline bool
1064  operator!=(const sub_match<_Bi_iter>& __lhs,
1066  { return !(__lhs == __rhs); }
1067 
1068  /**
1069  * @brief Tests the ordering of a regular expression submatch and a string.
1070  * @param __lhs A regular expression submatch.
1071  * @param __rhs A string.
1072  * @returns true if @a __lhs precedes @a __rhs, false otherwise.
1073  */
1074  template<typename _Bi_iter, class _Ch_traits, class _Ch_alloc>
1075  inline bool
1076  operator<(const sub_match<_Bi_iter>& __lhs,
1078  { return __lhs.compare(__rhs.c_str()) < 0; }
1079 
1080  /**
1081  * @brief Tests the ordering of a regular expression submatch and a string.
1082  * @param __lhs A regular expression submatch.
1083  * @param __rhs A string.
1084  * @returns true if @a __lhs succeeds @a __rhs, false otherwise.
1085  */
1086  template<typename _Bi_iter, class _Ch_traits, class _Ch_alloc>
1087  inline bool
1088  operator>(const sub_match<_Bi_iter>& __lhs,
1090  { return __rhs < __lhs; }
1091 
1092  /**
1093  * @brief Tests the ordering of a regular expression submatch and a string.
1094  * @param __lhs A regular expression submatch.
1095  * @param __rhs A string.
1096  * @returns true if @a __lhs does not precede @a __rhs, false otherwise.
1097  */
1098  template<typename _Bi_iter, class _Ch_traits, class _Ch_alloc>
1099  inline bool
1100  operator>=(const sub_match<_Bi_iter>& __lhs,
1102  { return !(__lhs < __rhs); }
1103 
1104  /**
1105  * @brief Tests the ordering of a regular expression submatch and a string.
1106  * @param __lhs A regular expression submatch.
1107  * @param __rhs A string.
1108  * @returns true if @a __lhs does not succeed @a __rhs, false otherwise.
1109  */
1110  template<typename _Bi_iter, class _Ch_traits, class _Ch_alloc>
1111  inline bool
1112  operator<=(const sub_match<_Bi_iter>& __lhs,
1114  { return !(__rhs < __lhs); }
1115 
1116  /**
1117  * @brief Tests the equivalence of a C string and a regular expression
1118  * submatch.
1119  * @param __lhs A C string.
1120  * @param __rhs A regular expression submatch.
1121  * @returns true if @a __lhs is equivalent to @a __rhs, false otherwise.
1122  */
1123  template<typename _Bi_iter>
1124  inline bool
1125  operator==(typename iterator_traits<_Bi_iter>::value_type const* __lhs,
1126  const sub_match<_Bi_iter>& __rhs)
1127  { return __rhs.compare(__lhs) == 0; }
1128 
1129  /**
1130  * @brief Tests the inequivalence of an iterator value and a regular
1131  * expression submatch.
1132  * @param __lhs A regular expression submatch.
1133  * @param __rhs A string.
1134  * @returns true if @a __lhs is not equivalent to @a __rhs, false otherwise.
1135  */
1136  template<typename _Bi_iter>
1137  inline bool
1138  operator!=(typename iterator_traits<_Bi_iter>::value_type const* __lhs,
1139  const sub_match<_Bi_iter>& __rhs)
1140  { return !(__lhs == __rhs); }
1141 
1142  /**
1143  * @brief Tests the ordering of a string and a regular expression submatch.
1144  * @param __lhs A string.
1145  * @param __rhs A regular expression submatch.
1146  * @returns true if @a __lhs precedes @a __rhs, false otherwise.
1147  */
1148  template<typename _Bi_iter>
1149  inline bool
1150  operator<(typename iterator_traits<_Bi_iter>::value_type const* __lhs,
1151  const sub_match<_Bi_iter>& __rhs)
1152  { return __rhs.compare(__lhs) > 0; }
1153 
1154  /**
1155  * @brief Tests the ordering of a string and a regular expression submatch.
1156  * @param __lhs A string.
1157  * @param __rhs A regular expression submatch.
1158  * @returns true if @a __lhs succeeds @a __rhs, false otherwise.
1159  */
1160  template<typename _Bi_iter>
1161  inline bool
1162  operator>(typename iterator_traits<_Bi_iter>::value_type const* __lhs,
1163  const sub_match<_Bi_iter>& __rhs)
1164  { return __rhs < __lhs; }
1165 
1166  /**
1167  * @brief Tests the ordering of a string and a regular expression submatch.
1168  * @param __lhs A string.
1169  * @param __rhs A regular expression submatch.
1170  * @returns true if @a __lhs does not precede @a __rhs, false otherwise.
1171  */
1172  template<typename _Bi_iter>
1173  inline bool
1174  operator>=(typename iterator_traits<_Bi_iter>::value_type const* __lhs,
1175  const sub_match<_Bi_iter>& __rhs)
1176  { return !(__lhs < __rhs); }
1177 
1178  /**
1179  * @brief Tests the ordering of a string and a regular expression submatch.
1180  * @param __lhs A string.
1181  * @param __rhs A regular expression submatch.
1182  * @returns true if @a __lhs does not succeed @a __rhs, false otherwise.
1183  */
1184  template<typename _Bi_iter>
1185  inline bool
1186  operator<=(typename iterator_traits<_Bi_iter>::value_type const* __lhs,
1187  const sub_match<_Bi_iter>& __rhs)
1188  { return !(__rhs < __lhs); }
1189 
1190  /**
1191  * @brief Tests the equivalence of a regular expression submatch and a
1192  * string.
1193  * @param __lhs A regular expression submatch.
1194  * @param __rhs A pointer to a string?
1195  * @returns true if @a __lhs is equivalent to @a __rhs, false otherwise.
1196  */
1197  template<typename _Bi_iter>
1198  inline bool
1199  operator==(const sub_match<_Bi_iter>& __lhs,
1200  typename iterator_traits<_Bi_iter>::value_type const* __rhs)
1201  { return __lhs.compare(__rhs) == 0; }
1202 
1203  /**
1204  * @brief Tests the inequivalence of a regular expression submatch and a
1205  * string.
1206  * @param __lhs A regular expression submatch.
1207  * @param __rhs A pointer to a string.
1208  * @returns true if @a __lhs is not equivalent to @a __rhs, false otherwise.
1209  */
1210  template<typename _Bi_iter>
1211  inline bool
1212  operator!=(const sub_match<_Bi_iter>& __lhs,
1213  typename iterator_traits<_Bi_iter>::value_type const* __rhs)
1214  { return !(__lhs == __rhs); }
1215 
1216  /**
1217  * @brief Tests the ordering of a regular expression submatch and a string.
1218  * @param __lhs A regular expression submatch.
1219  * @param __rhs A string.
1220  * @returns true if @a __lhs precedes @a __rhs, false otherwise.
1221  */
1222  template<typename _Bi_iter>
1223  inline bool
1224  operator<(const sub_match<_Bi_iter>& __lhs,
1225  typename iterator_traits<_Bi_iter>::value_type const* __rhs)
1226  { return __lhs.compare(__rhs) < 0; }
1227 
1228  /**
1229  * @brief Tests the ordering of a regular expression submatch and a string.
1230  * @param __lhs A regular expression submatch.
1231  * @param __rhs A string.
1232  * @returns true if @a __lhs succeeds @a __rhs, false otherwise.
1233  */
1234  template<typename _Bi_iter>
1235  inline bool
1236  operator>(const sub_match<_Bi_iter>& __lhs,
1237  typename iterator_traits<_Bi_iter>::value_type const* __rhs)
1238  { return __rhs < __lhs; }
1239 
1240  /**
1241  * @brief Tests the ordering of a regular expression submatch and a string.
1242  * @param __lhs A regular expression submatch.
1243  * @param __rhs A string.
1244  * @returns true if @a __lhs does not precede @a __rhs, false otherwise.
1245  */
1246  template<typename _Bi_iter>
1247  inline bool
1248  operator>=(const sub_match<_Bi_iter>& __lhs,
1249  typename iterator_traits<_Bi_iter>::value_type const* __rhs)
1250  { return !(__lhs < __rhs); }
1251 
1252  /**
1253  * @brief Tests the ordering of a regular expression submatch and a string.
1254  * @param __lhs A regular expression submatch.
1255  * @param __rhs A string.
1256  * @returns true if @a __lhs does not succeed @a __rhs, false otherwise.
1257  */
1258  template<typename _Bi_iter>
1259  inline bool
1260  operator<=(const sub_match<_Bi_iter>& __lhs,
1261  typename iterator_traits<_Bi_iter>::value_type const* __rhs)
1262  { return !(__rhs < __lhs); }
1263 
1264  /**
1265  * @brief Tests the equivalence of a string and a regular expression
1266  * submatch.
1267  * @param __lhs A string.
1268  * @param __rhs A regular expression submatch.
1269  * @returns true if @a __lhs is equivalent to @a __rhs, false otherwise.
1270  */
1271  template<typename _Bi_iter>
1272  inline bool
1273  operator==(typename iterator_traits<_Bi_iter>::value_type const& __lhs,
1274  const sub_match<_Bi_iter>& __rhs)
1275  {
1276  typedef typename sub_match<_Bi_iter>::string_type string_type;
1277  return __rhs.compare(string_type(1, __lhs)) == 0;
1278  }
1279 
1280  /**
1281  * @brief Tests the inequivalence of a string and a regular expression
1282  * submatch.
1283  * @param __lhs A string.
1284  * @param __rhs A regular expression submatch.
1285  * @returns true if @a __lhs is not equivalent to @a __rhs, false otherwise.
1286  */
1287  template<typename _Bi_iter>
1288  inline bool
1289  operator!=(typename iterator_traits<_Bi_iter>::value_type const& __lhs,
1290  const sub_match<_Bi_iter>& __rhs)
1291  { return !(__lhs == __rhs); }
1292 
1293  /**
1294  * @brief Tests the ordering of a string and a regular expression submatch.
1295  * @param __lhs A string.
1296  * @param __rhs A regular expression submatch.
1297  * @returns true if @a __lhs precedes @a __rhs, false otherwise.
1298  */
1299  template<typename _Bi_iter>
1300  inline bool
1301  operator<(typename iterator_traits<_Bi_iter>::value_type const& __lhs,
1302  const sub_match<_Bi_iter>& __rhs)
1303  {
1304  typedef typename sub_match<_Bi_iter>::string_type string_type;
1305  return __rhs.compare(string_type(1, __lhs)) > 0;
1306  }
1307 
1308  /**
1309  * @brief Tests the ordering of a string and a regular expression submatch.
1310  * @param __lhs A string.
1311  * @param __rhs A regular expression submatch.
1312  * @returns true if @a __lhs succeeds @a __rhs, false otherwise.
1313  */
1314  template<typename _Bi_iter>
1315  inline bool
1316  operator>(typename iterator_traits<_Bi_iter>::value_type const& __lhs,
1317  const sub_match<_Bi_iter>& __rhs)
1318  { return __rhs < __lhs; }
1319 
1320  /**
1321  * @brief Tests the ordering of a string and a regular expression submatch.
1322  * @param __lhs A string.
1323  * @param __rhs A regular expression submatch.
1324  * @returns true if @a __lhs does not precede @a __rhs, false otherwise.
1325  */
1326  template<typename _Bi_iter>
1327  inline bool
1328  operator>=(typename iterator_traits<_Bi_iter>::value_type const& __lhs,
1329  const sub_match<_Bi_iter>& __rhs)
1330  { return !(__lhs < __rhs); }
1331 
1332  /**
1333  * @brief Tests the ordering of a string and a regular expression submatch.
1334  * @param __lhs A string.
1335  * @param __rhs A regular expression submatch.
1336  * @returns true if @a __lhs does not succeed @a __rhs, false otherwise.
1337  */
1338  template<typename _Bi_iter>
1339  inline bool
1340  operator<=(typename iterator_traits<_Bi_iter>::value_type const& __lhs,
1341  const sub_match<_Bi_iter>& __rhs)
1342  { return !(__rhs < __lhs); }
1343 
1344  /**
1345  * @brief Tests the equivalence of a regular expression submatch and a
1346  * string.
1347  * @param __lhs A regular expression submatch.
1348  * @param __rhs A const string reference.
1349  * @returns true if @a __lhs is equivalent to @a __rhs, false otherwise.
1350  */
1351  template<typename _Bi_iter>
1352  inline bool
1353  operator==(const sub_match<_Bi_iter>& __lhs,
1354  typename iterator_traits<_Bi_iter>::value_type const& __rhs)
1355  {
1356  typedef typename sub_match<_Bi_iter>::string_type string_type;
1357  return __lhs.compare(string_type(1, __rhs)) == 0;
1358  }
1359 
1360  /**
1361  * @brief Tests the inequivalence of a regular expression submatch and a
1362  * string.
1363  * @param __lhs A regular expression submatch.
1364  * @param __rhs A const string reference.
1365  * @returns true if @a __lhs is not equivalent to @a __rhs, false otherwise.
1366  */
1367  template<typename _Bi_iter>
1368  inline bool
1369  operator!=(const sub_match<_Bi_iter>& __lhs,
1370  typename iterator_traits<_Bi_iter>::value_type const& __rhs)
1371  { return !(__lhs == __rhs); }
1372 
1373  /**
1374  * @brief Tests the ordering of a regular expression submatch and a string.
1375  * @param __lhs A regular expression submatch.
1376  * @param __rhs A const string reference.
1377  * @returns true if @a __lhs precedes @a __rhs, false otherwise.
1378  */
1379  template<typename _Bi_iter>
1380  inline bool
1381  operator<(const sub_match<_Bi_iter>& __lhs,
1382  typename iterator_traits<_Bi_iter>::value_type const& __rhs)
1383  {
1384  typedef typename sub_match<_Bi_iter>::string_type string_type;
1385  return __lhs.compare(string_type(1, __rhs)) < 0;
1386  }
1387 
1388  /**
1389  * @brief Tests the ordering of a regular expression submatch and a string.
1390  * @param __lhs A regular expression submatch.
1391  * @param __rhs A const string reference.
1392  * @returns true if @a __lhs succeeds @a __rhs, false otherwise.
1393  */
1394  template<typename _Bi_iter>
1395  inline bool
1396  operator>(const sub_match<_Bi_iter>& __lhs,
1397  typename iterator_traits<_Bi_iter>::value_type const& __rhs)
1398  { return __rhs < __lhs; }
1399 
1400  /**
1401  * @brief Tests the ordering of a regular expression submatch and a string.
1402  * @param __lhs A regular expression submatch.
1403  * @param __rhs A const string reference.
1404  * @returns true if @a __lhs does not precede @a __rhs, false otherwise.
1405  */
1406  template<typename _Bi_iter>
1407  inline bool
1408  operator>=(const sub_match<_Bi_iter>& __lhs,
1409  typename iterator_traits<_Bi_iter>::value_type const& __rhs)
1410  { return !(__lhs < __rhs); }
1411 
1412  /**
1413  * @brief Tests the ordering of a regular expression submatch and a string.
1414  * @param __lhs A regular expression submatch.
1415  * @param __rhs A const string reference.
1416  * @returns true if @a __lhs does not succeed @a __rhs, false otherwise.
1417  */
1418  template<typename _Bi_iter>
1419  inline bool
1420  operator<=(const sub_match<_Bi_iter>& __lhs,
1421  typename iterator_traits<_Bi_iter>::value_type const& __rhs)
1422  { return !(__rhs < __lhs); }
1423 
1424  /**
1425  * @brief Inserts a matched string into an output stream.
1426  *
1427  * @param __os The output stream.
1428  * @param __m A submatch string.
1429  *
1430  * @returns the output stream with the submatch string inserted.
1431  */
1432  template<typename _Ch_type, typename _Ch_traits, typename _Bi_iter>
1433  inline
1434  basic_ostream<_Ch_type, _Ch_traits>&
1435  operator<<(basic_ostream<_Ch_type, _Ch_traits>& __os,
1436  const sub_match<_Bi_iter>& __m)
1437  { return __os << __m.str(); }
1438 
1439  // [7.10] Class template match_results
1440 
1441  /*
1442  * Special sub_match object representing an unmatched sub-expression.
1443  */
1444  template<typename _Bi_iter>
1445  inline const sub_match<_Bi_iter>&
1446  __unmatched_sub()
1447  {
1448  static const sub_match<_Bi_iter> __unmatched = sub_match<_Bi_iter>();
1449  return __unmatched;
1450  }
1451 
1452  /**
1453  * @brief The results of a match or search operation.
1454  *
1455  * A collection of character sequences representing the result of a regular
1456  * expression match. Storage for the collection is allocated and freed as
1457  * necessary by the member functions of class template match_results.
1458  *
1459  * This class satisfies the Sequence requirements, with the exception that
1460  * only the operations defined for a const-qualified Sequence are supported.
1461  *
1462  * The sub_match object stored at index 0 represents sub-expression 0, i.e.
1463  * the whole match. In this case the %sub_match member matched is always true.
1464  * The sub_match object stored at index n denotes what matched the marked
1465  * sub-expression n within the matched expression. If the sub-expression n
1466  * participated in a regular expression match then the %sub_match member
1467  * matched evaluates to true, and members first and second denote the range
1468  * of characters [first, second) which formed that match. Otherwise matched
1469  * is false, and members first and second point to the end of the sequence
1470  * that was searched.
1471  *
1472  * @nosubgrouping
1473  */
1474  template<typename _Bi_iter,
1475  typename _Alloc = allocator<sub_match<_Bi_iter> > >
1477  : private std::vector<sub_match<_Bi_iter>, _Alloc>
1478  {
1479  private:
1480  /*
1481  * The vector base is empty if this does not represent a successful match.
1482  * Otherwise it contains n+3 elements where n is the number of marked
1483  * sub-expressions:
1484  * [0] entire match
1485  * [1] 1st marked subexpression
1486  * ...
1487  * [n] nth marked subexpression
1488  * [n+1] prefix
1489  * [n+2] suffix
1490  */
1492  typedef std::iterator_traits<_Bi_iter> __iter_traits;
1494 
1495  public:
1496  /**
1497  * @name 10.? Public Types
1498  */
1499  //@{
1501  typedef const value_type& const_reference;
1502  typedef const_reference reference;
1503  typedef typename _Base_type::const_iterator const_iterator;
1504  typedef const_iterator iterator;
1505  typedef typename __iter_traits::difference_type difference_type;
1506  typedef typename allocator_traits<_Alloc>::size_type size_type;
1507  typedef _Alloc allocator_type;
1508  typedef typename __iter_traits::value_type char_type;
1510  //@}
1511 
1512  public:
1513  /**
1514  * @name 28.10.1 Construction, Copying, and Destruction
1515  */
1516  //@{
1517 
1518  /**
1519  * @brief Constructs a default %match_results container.
1520  * @post size() returns 0 and str() returns an empty string.
1521  */
1522  explicit
1523  match_results(const _Alloc& __a = _Alloc())
1524  : _Base_type(__a), _M_in_iterator(false)
1525  { }
1526 
1527  /**
1528  * @brief Copy constructs a %match_results.
1529  */
1531  : _Base_type(__rhs), _M_in_iterator(false)
1532  { }
1533 
1534  /**
1535  * @brief Move constructs a %match_results.
1536  */
1537  match_results(match_results&& __rhs) noexcept
1538  : _Base_type(std::move(__rhs)), _M_in_iterator(false)
1539  { }
1540 
1541  /**
1542  * @brief Assigns rhs to *this.
1543  */
1544  match_results&
1545  operator=(const match_results& __rhs)
1546  {
1547  match_results(__rhs).swap(*this);
1548  return *this;
1549  }
1550 
1551  /**
1552  * @brief Move-assigns rhs to *this.
1553  */
1554  match_results&
1556  {
1557  match_results(std::move(__rhs)).swap(*this);
1558  return *this;
1559  }
1560 
1561  /**
1562  * @brief Destroys a %match_results object.
1563  */
1565  { }
1566 
1567  //@}
1568 
1569  // 28.10.2, state:
1570  /**
1571  * @brief Indicates if the %match_results is ready.
1572  * @retval true The object has a fully-established result state.
1573  * @retval false The object is not ready.
1574  */
1575  bool ready() const { return !_Base_type::empty(); }
1576 
1577  /**
1578  * @name 28.10.2 Size
1579  */
1580  //@{
1581 
1582  /**
1583  * @brief Gets the number of matches and submatches.
1584  *
1585  * The number of matches for a given regular expression will be either 0
1586  * if there was no match or mark_count() + 1 if a match was successful.
1587  * Some matches may be empty.
1588  *
1589  * @returns the number of matches found.
1590  */
1591  size_type
1592  size() const
1593  {
1594  size_type __size = _Base_type::size();
1595  return (__size && _Base_type::operator[](0).matched) ? __size - 2 : 0;
1596  }
1597 
1598  size_type
1599  max_size() const
1600  { return _Base_type::max_size(); }
1601 
1602  /**
1603  * @brief Indicates if the %match_results contains no results.
1604  * @retval true The %match_results object is empty.
1605  * @retval false The %match_results object is not empty.
1606  */
1607  bool
1608  empty() const
1609  { return size() == 0; }
1610 
1611  //@}
1612 
1613  /**
1614  * @name 10.3 Element Access
1615  */
1616  //@{
1617 
1618  /**
1619  * @brief Gets the length of the indicated submatch.
1620  * @param __sub indicates the submatch.
1621  * @pre ready() == true
1622  *
1623  * This function returns the length of the indicated submatch, or the
1624  * length of the entire match if @p __sub is zero (the default).
1625  */
1626  difference_type
1627  length(size_type __sub = 0) const
1628  { return (*this)[__sub].length(); }
1629 
1630  /**
1631  * @brief Gets the offset of the beginning of the indicated submatch.
1632  * @param __sub indicates the submatch.
1633  * @pre ready() == true
1634  *
1635  * This function returns the offset from the beginning of the target
1636  * sequence to the beginning of the submatch, unless the value of @p __sub
1637  * is zero (the default), in which case this function returns the offset
1638  * from the beginning of the target sequence to the beginning of the
1639  * match.
1640  *
1641  * Returns -1 if @p __sub is out of range.
1642  */
1643  difference_type
1644  position(size_type __sub = 0) const
1645  {
1646  // [28.12.1.4.5]
1647  if (_M_in_iterator)
1648  return __sub < size() ? std::distance(_M_begin,
1649  (*this)[__sub].first) : -1;
1650  else
1651  return __sub < size() ? std::distance(this->prefix().first,
1652  (*this)[__sub].first) : -1;
1653  }
1654 
1655  /**
1656  * @brief Gets the match or submatch converted to a string type.
1657  * @param __sub indicates the submatch.
1658  * @pre ready() == true
1659  *
1660  * This function gets the submatch (or match, if @p __sub is
1661  * zero) extracted from the target range and converted to the
1662  * associated string type.
1663  */
1664  string_type
1665  str(size_type __sub = 0) const
1666  { return (*this)[__sub].str(); }
1667 
1668  /**
1669  * @brief Gets a %sub_match reference for the match or submatch.
1670  * @param __sub indicates the submatch.
1671  * @pre ready() == true
1672  *
1673  * This function gets a reference to the indicated submatch, or
1674  * the entire match if @p __sub is zero.
1675  *
1676  * If @p __sub >= size() then this function returns a %sub_match with a
1677  * special value indicating no submatch.
1678  */
1679  const_reference
1680  operator[](size_type __sub) const
1681  {
1682  _GLIBCXX_DEBUG_ASSERT( ready() );
1683  return __sub < size()
1684  ? _Base_type::operator[](__sub)
1685  : __unmatched_sub<_Bi_iter>();
1686  }
1687 
1688  /**
1689  * @brief Gets a %sub_match representing the match prefix.
1690  * @pre ready() == true
1691  *
1692  * This function gets a reference to a %sub_match object representing the
1693  * part of the target range between the start of the target range and the
1694  * start of the match.
1695  */
1696  const_reference
1697  prefix() const
1698  {
1699  _GLIBCXX_DEBUG_ASSERT( ready() );
1700  return !empty()
1702  : __unmatched_sub<_Bi_iter>();
1703  }
1704 
1705  /**
1706  * @brief Gets a %sub_match representing the match suffix.
1707  * @pre ready() == true
1708  *
1709  * This function gets a reference to a %sub_match object representing the
1710  * part of the target range between the end of the match and the end of
1711  * the target range.
1712  */
1713  const_reference
1714  suffix() const
1715  {
1716  _GLIBCXX_DEBUG_ASSERT( ready() );
1717  return !empty()
1719  : __unmatched_sub<_Bi_iter>();
1720  }
1721 
1722  /**
1723  * @brief Gets an iterator to the start of the %sub_match collection.
1724  */
1725  const_iterator
1726  begin() const
1727  { return _Base_type::begin(); }
1728 
1729  /**
1730  * @brief Gets an iterator to the start of the %sub_match collection.
1731  */
1732  const_iterator
1733  cbegin() const
1734  { return _Base_type::cbegin() + 2; }
1735 
1736  /**
1737  * @brief Gets an iterator to one-past-the-end of the collection.
1738  */
1739  const_iterator
1740  end() const
1741  { return _Base_type::end() - 2; }
1742 
1743  /**
1744  * @brief Gets an iterator to one-past-the-end of the collection.
1745  */
1746  const_iterator
1747  cend() const
1748  { return _Base_type::cend(); }
1749 
1750  //@}
1751 
1752  /**
1753  * @name 10.4 Formatting
1754  *
1755  * These functions perform formatted substitution of the matched
1756  * character sequences into their target. The format specifiers and
1757  * escape sequences accepted by these functions are determined by
1758  * their @p flags parameter as documented above.
1759  */
1760  //@{
1761 
1762  /**
1763  * @pre ready() == true
1764  */
1765  template<typename _Out_iter>
1766  _Out_iter
1767  format(_Out_iter __out, const char_type* __fmt_first,
1768  const char_type* __fmt_last,
1769  match_flag_type __flags = regex_constants::format_default) const;
1770 
1771  /**
1772  * @pre ready() == true
1773  */
1774  template<typename _Out_iter, typename _St, typename _Sa>
1775  _Out_iter
1776  format(_Out_iter __out, const basic_string<char_type, _St, _Sa>& __fmt,
1778  {
1779  return format(__out, __fmt.data(), __fmt.data() + __fmt.size(),
1780  __flags);
1781  }
1782 
1783  /**
1784  * @pre ready() == true
1785  */
1786  template<typename _Out_iter, typename _St, typename _Sa>
1790  {
1792  format(std::back_inserter(__result), __fmt, __flags);
1793  return __result;
1794  }
1795 
1796  /**
1797  * @pre ready() == true
1798  */
1799  string_type
1800  format(const char_type* __fmt,
1802  {
1803  string_type __result;
1804  format(std::back_inserter(__result),
1805  __fmt,
1806  __fmt + char_traits<char_type>::length(__fmt),
1807  __flags);
1808  return __result;
1809  }
1810 
1811  //@}
1812 
1813  /**
1814  * @name 10.5 Allocator
1815  */
1816  //@{
1817 
1818  /**
1819  * @brief Gets a copy of the allocator.
1820  */
1821  allocator_type
1823  { return _Base_type::get_allocator(); }
1824 
1825  //@}
1826 
1827  /**
1828  * @name 10.6 Swap
1829  */
1830  //@{
1831 
1832  /**
1833  * @brief Swaps the contents of two match_results.
1834  */
1835  void
1837  { _Base_type::swap(__that); }
1838  //@}
1839 
1840  private:
1841  template<typename, typename, typename, bool>
1842  friend class __detail::_Executor;
1843 
1844  template<typename, typename, typename>
1845  friend class regex_iterator;
1846 
1847  template<typename _Bp, typename _Ap, typename _Cp, typename _Rp,
1848  __detail::_RegexExecutorPolicy, bool>
1849  friend bool
1850  __detail::__regex_algo_impl(_Bp, _Bp, match_results<_Bp, _Ap>&,
1851  const basic_regex<_Cp, _Rp>&,
1853 
1854  _Bi_iter _M_begin;
1855  bool _M_in_iterator;
1856  };
1857 
1858  typedef match_results<const char*> cmatch;
1859  typedef match_results<string::const_iterator> smatch;
1860 #ifdef _GLIBCXX_USE_WCHAR_T
1861  typedef match_results<const wchar_t*> wcmatch;
1862  typedef match_results<wstring::const_iterator> wsmatch;
1863 #endif
1864 
1865  // match_results comparisons
1866  /**
1867  * @brief Compares two match_results for equality.
1868  * @returns true if the two objects refer to the same match,
1869  * false otherwise.
1870  */
1871  template<typename _Bi_iter, typename _Alloc>
1872  inline bool
1873  operator==(const match_results<_Bi_iter, _Alloc>& __m1,
1874  const match_results<_Bi_iter, _Alloc>& __m2)
1875  {
1876  if (__m1.ready() != __m2.ready())
1877  return false;
1878  if (!__m1.ready()) // both are not ready
1879  return true;
1880  if (__m1.empty() != __m2.empty())
1881  return false;
1882  if (__m1.empty()) // both are empty
1883  return true;
1884  return __m1.prefix() == __m2.prefix()
1885  && __m1.size() == __m2.size()
1886  && std::equal(__m1.begin(), __m1.end(), __m2.begin())
1887  && __m1.suffix() == __m2.suffix();
1888  }
1889 
1890  /**
1891  * @brief Compares two match_results for inequality.
1892  * @returns true if the two objects do not refer to the same match,
1893  * false otherwise.
1894  */
1895  template<typename _Bi_iter, class _Alloc>
1896  inline bool
1897  operator!=(const match_results<_Bi_iter, _Alloc>& __m1,
1898  const match_results<_Bi_iter, _Alloc>& __m2)
1899  { return !(__m1 == __m2); }
1900 
1901  // [7.10.6] match_results swap
1902  /**
1903  * @brief Swaps two match results.
1904  * @param __lhs A match result.
1905  * @param __rhs A match result.
1906  *
1907  * The contents of the two match_results objects are swapped.
1908  */
1909  template<typename _Bi_iter, typename _Alloc>
1910  inline void
1913  { __lhs.swap(__rhs); }
1914 
1915  // [7.11.2] Function template regex_match
1916  /**
1917  * @name Matching, Searching, and Replacing
1918  */
1919  //@{
1920 
1921  /**
1922  * @brief Determines if there is a match between the regular expression @p e
1923  * and all of the character sequence [first, last).
1924  *
1925  * @param __s Start of the character sequence to match.
1926  * @param __e One-past-the-end of the character sequence to match.
1927  * @param __m The match results.
1928  * @param __re The regular expression.
1929  * @param __flags Controls how the regular expression is matched.
1930  *
1931  * @retval true A match exists.
1932  * @retval false Otherwise.
1933  *
1934  * @throws an exception of type regex_error.
1935  */
1936  template<typename _Bi_iter, typename _Alloc,
1937  typename _Ch_type, typename _Rx_traits>
1938  inline bool
1939  regex_match(_Bi_iter __s,
1940  _Bi_iter __e,
1945  {
1946  return __detail::__regex_algo_impl<_Bi_iter, _Alloc, _Ch_type, _Rx_traits,
1947  __detail::_RegexExecutorPolicy::_S_auto, true>
1948  (__s, __e, __m, __re, __flags);
1949  }
1950 
1951  /**
1952  * @brief Indicates if there is a match between the regular expression @p e
1953  * and all of the character sequence [first, last).
1954  *
1955  * @param __first Beginning of the character sequence to match.
1956  * @param __last One-past-the-end of the character sequence to match.
1957  * @param __re The regular expression.
1958  * @param __flags Controls how the regular expression is matched.
1959  *
1960  * @retval true A match exists.
1961  * @retval false Otherwise.
1962  *
1963  * @throws an exception of type regex_error.
1964  */
1965  template<typename _Bi_iter, typename _Ch_type, typename _Rx_traits>
1966  inline bool
1967  regex_match(_Bi_iter __first, _Bi_iter __last,
1971  {
1972  match_results<_Bi_iter> __what;
1973  return regex_match(__first, __last, __what, __re, __flags);
1974  }
1975 
1976  /**
1977  * @brief Determines if there is a match between the regular expression @p e
1978  * and a C-style null-terminated string.
1979  *
1980  * @param __s The C-style null-terminated string to match.
1981  * @param __m The match results.
1982  * @param __re The regular expression.
1983  * @param __f Controls how the regular expression is matched.
1984  *
1985  * @retval true A match exists.
1986  * @retval false Otherwise.
1987  *
1988  * @throws an exception of type regex_error.
1989  */
1990  template<typename _Ch_type, typename _Alloc, typename _Rx_traits>
1991  inline bool
1992  regex_match(const _Ch_type* __s,
1997  { return regex_match(__s, __s + _Rx_traits::length(__s), __m, __re, __f); }
1998 
1999  /**
2000  * @brief Determines if there is a match between the regular expression @p e
2001  * and a string.
2002  *
2003  * @param __s The string to match.
2004  * @param __m The match results.
2005  * @param __re The regular expression.
2006  * @param __flags Controls how the regular expression is matched.
2007  *
2008  * @retval true A match exists.
2009  * @retval false Otherwise.
2010  *
2011  * @throws an exception of type regex_error.
2012  */
2013  template<typename _Ch_traits, typename _Ch_alloc,
2014  typename _Alloc, typename _Ch_type, typename _Rx_traits>
2015  inline bool
2017  match_results<typename basic_string<_Ch_type,
2018  _Ch_traits, _Ch_alloc>::const_iterator, _Alloc>& __m,
2022  { return regex_match(__s.begin(), __s.end(), __m, __re, __flags); }
2023 
2024  /**
2025  * @brief Indicates if there is a match between the regular expression @p e
2026  * and a C-style null-terminated string.
2027  *
2028  * @param __s The C-style null-terminated string to match.
2029  * @param __re The regular expression.
2030  * @param __f Controls how the regular expression is matched.
2031  *
2032  * @retval true A match exists.
2033  * @retval false Otherwise.
2034  *
2035  * @throws an exception of type regex_error.
2036  */
2037  template<typename _Ch_type, class _Rx_traits>
2038  inline bool
2039  regex_match(const _Ch_type* __s,
2043  { return regex_match(__s, __s + _Rx_traits::length(__s), __re, __f); }
2044 
2045  /**
2046  * @brief Indicates if there is a match between the regular expression @p e
2047  * and a string.
2048  *
2049  * @param __s [IN] The string to match.
2050  * @param __re [IN] The regular expression.
2051  * @param __flags [IN] Controls how the regular expression is matched.
2052  *
2053  * @retval true A match exists.
2054  * @retval false Otherwise.
2055  *
2056  * @throws an exception of type regex_error.
2057  */
2058  template<typename _Ch_traits, typename _Str_allocator,
2059  typename _Ch_type, typename _Rx_traits>
2060  inline bool
2065  { return regex_match(__s.begin(), __s.end(), __re, __flags); }
2066 
2067  // [7.11.3] Function template regex_search
2068  /**
2069  * Searches for a regular expression within a range.
2070  * @param __first [IN] The start of the string to search.
2071  * @param __last [IN] One-past-the-end of the string to search.
2072  * @param __m [OUT] The match results.
2073  * @param __re [IN] The regular expression to search for.
2074  * @param __flags [IN] Search policy flags.
2075  * @retval true A match was found within the string.
2076  * @retval false No match was found within the string, the content of %m is
2077  * undefined.
2078  *
2079  * @throws an exception of type regex_error.
2080  */
2081  template<typename _Bi_iter, typename _Alloc,
2082  typename _Ch_type, typename _Rx_traits>
2083  inline bool
2084  regex_search(_Bi_iter __s, _Bi_iter __e,
2089  {
2090  return __detail::__regex_algo_impl<_Bi_iter, _Alloc, _Ch_type, _Rx_traits,
2091  __detail::_RegexExecutorPolicy::_S_auto, false>
2092  (__s, __e, __m, __re, __flags);
2093  }
2094 
2095  /**
2096  * Searches for a regular expression within a range.
2097  * @param __first [IN] The start of the string to search.
2098  * @param __last [IN] One-past-the-end of the string to search.
2099  * @param __re [IN] The regular expression to search for.
2100  * @param __flags [IN] Search policy flags.
2101  * @retval true A match was found within the string.
2102  * @retval false No match was found within the string.
2103  *
2104  * @throws an exception of type regex_error.
2105  */
2106  template<typename _Bi_iter, typename _Ch_type, typename _Rx_traits>
2107  inline bool
2108  regex_search(_Bi_iter __first, _Bi_iter __last,
2112  {
2113  match_results<_Bi_iter> __what;
2114  return regex_search(__first, __last, __what, __re, __flags);
2115  }
2116 
2117  /**
2118  * @brief Searches for a regular expression within a C-string.
2119  * @param __s [IN] A C-string to search for the regex.
2120  * @param __m [OUT] The set of regex matches.
2121  * @param __e [IN] The regex to search for in @p s.
2122  * @param __f [IN] The search flags.
2123  * @retval true A match was found within the string.
2124  * @retval false No match was found within the string, the content of %m is
2125  * undefined.
2126  *
2127  * @throws an exception of type regex_error.
2128  */
2129  template<typename _Ch_type, class _Alloc, class _Rx_traits>
2130  inline bool
2131  regex_search(const _Ch_type* __s,
2136  { return regex_search(__s, __s + _Rx_traits::length(__s), __m, __e, __f); }
2137 
2138  /**
2139  * @brief Searches for a regular expression within a C-string.
2140  * @param __s [IN] The C-string to search.
2141  * @param __e [IN] The regular expression to search for.
2142  * @param __f [IN] Search policy flags.
2143  * @retval true A match was found within the string.
2144  * @retval false No match was found within the string.
2145  *
2146  * @throws an exception of type regex_error.
2147  */
2148  template<typename _Ch_type, typename _Rx_traits>
2149  inline bool
2150  regex_search(const _Ch_type* __s,
2154  { return regex_search(__s, __s + _Rx_traits::length(__s), __e, __f); }
2155 
2156  /**
2157  * @brief Searches for a regular expression within a string.
2158  * @param __s [IN] The string to search.
2159  * @param __e [IN] The regular expression to search for.
2160  * @param __flags [IN] Search policy flags.
2161  * @retval true A match was found within the string.
2162  * @retval false No match was found within the string.
2163  *
2164  * @throws an exception of type regex_error.
2165  */
2166  template<typename _Ch_traits, typename _String_allocator,
2167  typename _Ch_type, typename _Rx_traits>
2168  inline bool
2169  regex_search(const basic_string<_Ch_type, _Ch_traits,
2170  _String_allocator>& __s,
2174  { return regex_search(__s.begin(), __s.end(), __e, __flags); }
2175 
2176  /**
2177  * @brief Searches for a regular expression within a string.
2178  * @param __s [IN] A C++ string to search for the regex.
2179  * @param __m [OUT] The set of regex matches.
2180  * @param __e [IN] The regex to search for in @p s.
2181  * @param __f [IN] The search flags.
2182  * @retval true A match was found within the string.
2183  * @retval false No match was found within the string, the content of %m is
2184  * undefined.
2185  *
2186  * @throws an exception of type regex_error.
2187  */
2188  template<typename _Ch_traits, typename _Ch_alloc,
2189  typename _Alloc, typename _Ch_type,
2190  typename _Rx_traits>
2191  inline bool
2193  match_results<typename basic_string<_Ch_type,
2194  _Ch_traits, _Ch_alloc>::const_iterator, _Alloc>& __m,
2198  { return regex_search(__s.begin(), __s.end(), __m, __e, __f); }
2199 
2200  // std [28.11.4] Function template regex_replace
2201  /**
2202  * @brief Search for a regular expression within a range for multiple times,
2203  and replace the matched parts through filling a format string.
2204  * @param __out [OUT] The output iterator.
2205  * @param __first [IN] The start of the string to search.
2206  * @param __last [IN] One-past-the-end of the string to search.
2207  * @param __e [IN] The regular expression to search for.
2208  * @param __fmt [IN] The format string.
2209  * @param __flags [IN] Search and replace policy flags.
2210  *
2211  * @returns __out
2212  * @throws an exception of type regex_error.
2213  */
2214  template<typename _Out_iter, typename _Bi_iter,
2215  typename _Rx_traits, typename _Ch_type,
2216  typename _St, typename _Sa>
2217  inline _Out_iter
2218  regex_replace(_Out_iter __out, _Bi_iter __first, _Bi_iter __last,
2220  const basic_string<_Ch_type, _St, _Sa>& __fmt,
2223  {
2224  return regex_replace(__out, __first, __last, __e, __fmt.c_str(), __flags);
2225  }
2226 
2227  /**
2228  * @brief Search for a regular expression within a range for multiple times,
2229  and replace the matched parts through filling a format C-string.
2230  * @param __out [OUT] The output iterator.
2231  * @param __first [IN] The start of the string to search.
2232  * @param __last [IN] One-past-the-end of the string to search.
2233  * @param __e [IN] The regular expression to search for.
2234  * @param __fmt [IN] The format C-string.
2235  * @param __flags [IN] Search and replace policy flags.
2236  *
2237  * @returns __out
2238  * @throws an exception of type regex_error.
2239  */
2240  template<typename _Out_iter, typename _Bi_iter,
2241  typename _Rx_traits, typename _Ch_type>
2242  _Out_iter
2243  regex_replace(_Out_iter __out, _Bi_iter __first, _Bi_iter __last,
2244  const basic_regex<_Ch_type, _Rx_traits>& __e,
2245  const _Ch_type* __fmt,
2248 
2249  /**
2250  * @brief Search for a regular expression within a string for multiple times,
2251  and replace the matched parts through filling a format string.
2252  * @param __s [IN] The string to search and replace.
2253  * @param __e [IN] The regular expression to search for.
2254  * @param __fmt [IN] The format string.
2255  * @param __flags [IN] Search and replace policy flags.
2256  *
2257  * @returns The string after replacing.
2258  * @throws an exception of type regex_error.
2259  */
2260  template<typename _Rx_traits, typename _Ch_type,
2261  typename _St, typename _Sa, typename _Fst, typename _Fsa>
2262  inline basic_string<_Ch_type, _St, _Sa>
2268  {
2271  __s.begin(), __s.end(), __e, __fmt, __flags);
2272  return __result;
2273  }
2274 
2275  /**
2276  * @brief Search for a regular expression within a string for multiple times,
2277  and replace the matched parts through filling a format C-string.
2278  * @param __s [IN] The string to search and replace.
2279  * @param __e [IN] The regular expression to search for.
2280  * @param __fmt [IN] The format C-string.
2281  * @param __flags [IN] Search and replace policy flags.
2282  *
2283  * @returns The string after replacing.
2284  * @throws an exception of type regex_error.
2285  */
2286  template<typename _Rx_traits, typename _Ch_type,
2287  typename _St, typename _Sa>
2288  inline basic_string<_Ch_type, _St, _Sa>
2291  const _Ch_type* __fmt,
2294  {
2297  __s.begin(), __s.end(), __e, __fmt, __flags);
2298  return __result;
2299  }
2300 
2301  /**
2302  * @brief Search for a regular expression within a C-string for multiple
2303  times, and replace the matched parts through filling a format string.
2304  * @param __s [IN] The C-string to search and replace.
2305  * @param __e [IN] The regular expression to search for.
2306  * @param __fmt [IN] The format string.
2307  * @param __flags [IN] Search and replace policy flags.
2308  *
2309  * @returns The string after replacing.
2310  * @throws an exception of type regex_error.
2311  */
2312  template<typename _Rx_traits, typename _Ch_type,
2313  typename _St, typename _Sa>
2314  inline basic_string<_Ch_type>
2315  regex_replace(const _Ch_type* __s,
2317  const basic_string<_Ch_type, _St, _Sa>& __fmt,
2320  {
2321  basic_string<_Ch_type> __result;
2322  regex_replace(std::back_inserter(__result), __s,
2323  __s + char_traits<_Ch_type>::length(__s),
2324  __e, __fmt, __flags);
2325  return __result;
2326  }
2327 
2328  /**
2329  * @brief Search for a regular expression within a C-string for multiple
2330  times, and replace the matched parts through filling a format C-string.
2331  * @param __s [IN] The C-string to search and replace.
2332  * @param __e [IN] The regular expression to search for.
2333  * @param __fmt [IN] The format C-string.
2334  * @param __flags [IN] Search and replace policy flags.
2335  *
2336  * @returns The string after replacing.
2337  * @throws an exception of type regex_error.
2338  */
2339  template<typename _Rx_traits, typename _Ch_type>
2340  inline basic_string<_Ch_type>
2341  regex_replace(const _Ch_type* __s,
2343  const _Ch_type* __fmt,
2346  {
2347  basic_string<_Ch_type> __result;
2348  regex_replace(std::back_inserter(__result), __s,
2349  __s + char_traits<_Ch_type>::length(__s),
2350  __e, __fmt, __flags);
2351  return __result;
2352  }
2353 
2354  //@}
2355 
2356  // std [28.12] Class template regex_iterator
2357  /**
2358  * An iterator adaptor that will provide repeated calls of regex_search over
2359  * a range until no more matches remain.
2360  */
2361  template<typename _Bi_iter,
2362  typename _Ch_type = typename iterator_traits<_Bi_iter>::value_type,
2363  typename _Rx_traits = regex_traits<_Ch_type> >
2365  {
2366  public:
2369  typedef std::ptrdiff_t difference_type;
2370  typedef const value_type* pointer;
2371  typedef const value_type& reference;
2373 
2374  /**
2375  * @brief Provides a singular iterator, useful for indicating
2376  * one-past-the-end of a range.
2377  */
2379  : _M_match()
2380  { }
2381 
2382  /**
2383  * Constructs a %regex_iterator...
2384  * @param __a [IN] The start of a text range to search.
2385  * @param __b [IN] One-past-the-end of the text range to search.
2386  * @param __re [IN] The regular expression to match.
2387  * @param __m [IN] Policy flags for match rules.
2388  */
2389  regex_iterator(_Bi_iter __a, _Bi_iter __b, const regex_type& __re,
2392  : _M_begin(__a), _M_end(__b), _M_pregex(&__re), _M_flags(__m), _M_match()
2393  {
2394  if (!regex_search(_M_begin, _M_end, _M_match, *_M_pregex, _M_flags))
2395  *this = regex_iterator();
2396  }
2397 
2398  /**
2399  * Copy constructs a %regex_iterator.
2400  */
2401  regex_iterator(const regex_iterator& __rhs) = default;
2402 
2403  /**
2404  * @brief Assigns one %regex_iterator to another.
2405  */
2407  operator=(const regex_iterator& __rhs) = default;
2408 
2409  /**
2410  * @brief Tests the equivalence of two regex iterators.
2411  */
2412  bool
2413  operator==(const regex_iterator& __rhs) const;
2414 
2415  /**
2416  * @brief Tests the inequivalence of two regex iterators.
2417  */
2418  bool
2419  operator!=(const regex_iterator& __rhs) const
2420  { return !(*this == __rhs); }
2421 
2422  /**
2423  * @brief Dereferences a %regex_iterator.
2424  */
2425  const value_type&
2426  operator*() const
2427  { return _M_match; }
2428 
2429  /**
2430  * @brief Selects a %regex_iterator member.
2431  */
2432  const value_type*
2433  operator->() const
2434  { return &_M_match; }
2435 
2436  /**
2437  * @brief Increments a %regex_iterator.
2438  */
2440  operator++();
2441 
2442  /**
2443  * @brief Postincrements a %regex_iterator.
2444  */
2447  {
2448  auto __tmp = *this;
2449  ++(*this);
2450  return __tmp;
2451  }
2452 
2453  private:
2454  _Bi_iter _M_begin;
2455  _Bi_iter _M_end;
2456  const regex_type* _M_pregex;
2458  match_results<_Bi_iter> _M_match;
2459  };
2460 
2461  typedef regex_iterator<const char*> cregex_iterator;
2462  typedef regex_iterator<string::const_iterator> sregex_iterator;
2463 #ifdef _GLIBCXX_USE_WCHAR_T
2464  typedef regex_iterator<const wchar_t*> wcregex_iterator;
2465  typedef regex_iterator<wstring::const_iterator> wsregex_iterator;
2466 #endif
2467 
2468  // [7.12.2] Class template regex_token_iterator
2469  /**
2470  * Iterates over submatches in a range (or @a splits a text string).
2471  *
2472  * The purpose of this iterator is to enumerate all, or all specified,
2473  * matches of a regular expression within a text range. The dereferenced
2474  * value of an iterator of this class is a std::sub_match object.
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:
2484  typedef std::ptrdiff_t difference_type;
2485  typedef const value_type* pointer;
2486  typedef const value_type& reference;
2488 
2489  public:
2490  /**
2491  * @brief Default constructs a %regex_token_iterator.
2492  *
2493  * A default-constructed %regex_token_iterator is a singular iterator
2494  * that will compare equal to the one-past-the-end value for any
2495  * iterator of the same type.
2496  */
2498  : _M_position(), _M_subs(), _M_suffix(), _M_n(0), _M_result(nullptr),
2499  _M_has_m1(false)
2500  { }
2501 
2502  /**
2503  * Constructs a %regex_token_iterator...
2504  * @param __a [IN] The start of the text to search.
2505  * @param __b [IN] One-past-the-end of the text to search.
2506  * @param __re [IN] The regular expression to search for.
2507  * @param __submatch [IN] Which submatch to return. There are some
2508  * special values for this parameter:
2509  * - -1 each enumerated subexpression does NOT
2510  * match the regular expression (aka field
2511  * splitting)
2512  * - 0 the entire string matching the
2513  * subexpression is returned for each match
2514  * within the text.
2515  * - >0 enumerates only the indicated
2516  * subexpression from a match within the text.
2517  * @param __m [IN] Policy flags for match rules.
2518  */
2519  regex_token_iterator(_Bi_iter __a, _Bi_iter __b, const regex_type& __re,
2520  int __submatch = 0,
2523  : _M_position(__a, __b, __re, __m), _M_subs(1, __submatch), _M_n(0)
2524  { _M_init(__a, __b); }
2525 
2526  /**
2527  * Constructs a %regex_token_iterator...
2528  * @param __a [IN] The start of the text to search.
2529  * @param __b [IN] One-past-the-end of the text to search.
2530  * @param __re [IN] The regular expression to search for.
2531  * @param __submatches [IN] A list of subexpressions to return for each
2532  * regular expression match within the text.
2533  * @param __m [IN] Policy flags for match rules.
2534  */
2535  regex_token_iterator(_Bi_iter __a, _Bi_iter __b,
2536  const regex_type& __re,
2537  const std::vector<int>& __submatches,
2540  : _M_position(__a, __b, __re, __m), _M_subs(__submatches), _M_n(0)
2541  { _M_init(__a, __b); }
2542 
2543  /**
2544  * Constructs a %regex_token_iterator...
2545  * @param __a [IN] The start of the text to search.
2546  * @param __b [IN] One-past-the-end of the text to search.
2547  * @param __re [IN] The regular expression to search for.
2548  * @param __submatches [IN] A list of subexpressions to return for each
2549  * regular expression match within the text.
2550  * @param __m [IN] Policy flags for match rules.
2551  */
2552  regex_token_iterator(_Bi_iter __a, _Bi_iter __b,
2553  const regex_type& __re,
2554  initializer_list<int> __submatches,
2557  : _M_position(__a, __b, __re, __m), _M_subs(__submatches), _M_n(0)
2558  { _M_init(__a, __b); }
2559 
2560  /**
2561  * Constructs a %regex_token_iterator...
2562  * @param __a [IN] The start of the text to search.
2563  * @param __b [IN] One-past-the-end of the text to search.
2564  * @param __re [IN] The regular expression to search for.
2565  * @param __submatches [IN] A list of subexpressions to return for each
2566  * regular expression match within the text.
2567  * @param __m [IN] Policy flags for match rules.
2568  */
2569  template<std::size_t _Nm>
2570  regex_token_iterator(_Bi_iter __a, _Bi_iter __b,
2571  const regex_type& __re,
2572  const int (&__submatches)[_Nm],
2575  : _M_position(__a, __b, __re, __m),
2576  _M_subs(__submatches, *(&__submatches+1)), _M_n(0)
2577  { _M_init(__a, __b); }
2578 
2579  /**
2580  * @brief Copy constructs a %regex_token_iterator.
2581  * @param __rhs [IN] A %regex_token_iterator to copy.
2582  */
2584  : _M_position(__rhs._M_position), _M_subs(__rhs._M_subs),
2585  _M_suffix(__rhs._M_suffix), _M_n(__rhs._M_n), _M_result(__rhs._M_result),
2586  _M_has_m1(__rhs._M_has_m1)
2587  {
2588  if (__rhs._M_result == &__rhs._M_suffix)
2589  _M_result = &_M_suffix;
2590  }
2591 
2592  /**
2593  * @brief Assigns a %regex_token_iterator to another.
2594  * @param __rhs [IN] A %regex_token_iterator to copy.
2595  */
2597  operator=(const regex_token_iterator& __rhs);
2598 
2599  /**
2600  * @brief Compares a %regex_token_iterator to another for equality.
2601  */
2602  bool
2603  operator==(const regex_token_iterator& __rhs) const;
2604 
2605  /**
2606  * @brief Compares a %regex_token_iterator to another for inequality.
2607  */
2608  bool
2609  operator!=(const regex_token_iterator& __rhs) const
2610  { return !(*this == __rhs); }
2611 
2612  /**
2613  * @brief Dereferences a %regex_token_iterator.
2614  */
2615  const value_type&
2616  operator*() const
2617  { return *_M_result; }
2618 
2619  /**
2620  * @brief Selects a %regex_token_iterator member.
2621  */
2622  const value_type*
2623  operator->() const
2624  { return _M_result; }
2625 
2626  /**
2627  * @brief Increments a %regex_token_iterator.
2628  */
2630  operator++();
2631 
2632  /**
2633  * @brief Postincrements a %regex_token_iterator.
2634  */
2637  {
2638  auto __tmp = *this;
2639  ++(*this);
2640  return __tmp;
2641  }
2642 
2643  private:
2645 
2646  void
2647  _M_init(_Bi_iter __a, _Bi_iter __b);
2648 
2649  const value_type&
2650  _M_current_match() const
2651  {
2652  if (_M_subs[_M_n] == -1)
2653  return (*_M_position).prefix();
2654  else
2655  return (*_M_position)[_M_subs[_M_n]];
2656  }
2657 
2658  constexpr bool
2659  _M_end_of_seq()
2660  { return _M_result == nullptr; }
2661 
2662  _Position _M_position;
2663  std::vector<int> _M_subs;
2664  value_type _M_suffix;
2665  std::size_t _M_n;
2666  const value_type* _M_result;
2667 
2668  // Show whether _M_subs contains -1
2669  bool _M_has_m1;
2670  };
2671 
2672  /** @brief Token iterator for C-style NULL-terminated strings. */
2674 
2675  /** @brief Token iterator for standard strings. */
2677 
2678 #ifdef _GLIBCXX_USE_WCHAR_T
2679  /** @brief Token iterator for C-style NULL-terminated wide strings. */
2681 
2682  /** @brief Token iterator for standard wide-character strings. */
2684 #endif
2685 
2686  //@} // group regex
2687 _GLIBCXX_END_NAMESPACE_VERSION
2688 } // namespace
2689 
2690 #include <bits/regex.tcc>
const _CharT * data() const noexcept
Return const pointer to contents.
basic_regex & operator=(const basic_string< _Ch_type, _Ch_typeraits, _Alloc > &__s)
Replaces a regular expression with a new one constructed from a string.
Definition: regex.h:559
_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:2218
regex_token_iterator< wstring::const_iterator > wsregex_token_iterator
Token iterator for standard wide-character strings.
Definition: regex.h:2683
size_type max_size() const
Gets the number of matches and submatches.
Definition: regex.h:1599
regex_token_iterator< string::const_iterator > sregex_token_iterator
Token iterator for standard strings.
Definition: regex.h:2676
bitset< _Nb > operator~() const noexcept
See the no-argument flip().
Definition: bitset:1137
bitset< _Nb > operator|(const bitset< _Nb > &__x, const bitset< _Nb > &__y) noexcept
Global bitwise operations on bitsets.
Definition: bitset:1435
static std::size_t length(const char_type *__p)
Gives the length of a C-style string starting at __p.
Definition: regex.h:165
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:242
_BiIter second
first is a copy of the first object
Definition: stl_pair.h:102
difference_type length() const
Definition: regex.h:806
const _CharT * c_str() const noexcept
Return const pointer to null-terminated contents.
regex_token_iterator & operator=(const regex_token_iterator &__rhs)
Assigns a regex_token_iterator to another.
Definition: regex.tcc:613
Forward iterators support a superset of input iterator operations.
sub_match< const char * > csub_match
Standard regex submatch over a C-style null-terminated string.
Definition: regex.h:881
locale_type getloc() const
Gets the locale currently imbued in the regular expression object.
Definition: regex.h:711
regex_traits()
Constructs a default traits object.
Definition: regex.h:152
~match_results()
Destroys a match_results object.
Definition: regex.h:1564
match_flag_type
This is a bitmask type indicating regex matching rules.
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:1939
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:2084
int compare(const value_type *__s) const
Compares this sub_match to a C-style string.
Definition: regex.h:875
constexpr const _Tp * begin(initializer_list< _Tp > __ils) noexcept
Return an iterator pointing to the first element of the initializer_list.
match_results & operator=(const match_results &__rhs)
Assigns rhs to *this.
Definition: regex.h:1545
The results of a match or search operation.
Definition: regex.h:1476
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:603
locale_type imbue(locale_type __loc)
Imbues the regular expression object with the given locale.
Definition: regex.h:703
_BiIter first
second_type is the second bound type
Definition: stl_pair.h:101
string_type str(size_type __sub=0) const
Gets the match or submatch converted to a string type.
Definition: regex.h:1665
int compare(const sub_match &__s) const
Compares this and another matched sequence.
Definition: regex.h:849
basic_regex & assign(_InputIterator __first, _InputIterator __last, flag_type __flags=ECMAScript)
Assigns a new regular expression to a regex object.
Definition: regex.h:660
iterator begin()
Definition: basic_string.h:614
Struct holding two objects of arbitrary type.
Definition: stl_pair.h:96
regex_token_iterator & operator++()
Increments a regex_token_iterator.
Definition: regex.tcc:651
void swap(basic_regex &__rhs)
Swaps the contents of two regular expression objects.
Definition: regex.h:721
basic_regex & assign(basic_regex &&__rhs) noexcept
The move-assignment operator.
Definition: regex.h:582
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:1788
sub_match< string::const_iterator > ssub_match
Standard regex submatch over a standard string.
Definition: regex.h:884
size_type size() const noexcept
Returns the number of characters in the string, not including any null-termination.
Definition: basic_string.h:724
void swap(match_results &__that)
Swaps the contents of two match_results.
Definition: regex.h:1836
basic_regex & assign(const basic_regex &__rhs)
the real assignment operator.
Definition: regex.h:569
size_type max_size() const noexcept
Definition: stl_vector.h:645
char_type translate(char_type __c) const
Performs the identity translation.
Definition: regex.h:176
char_type translate_nocase(char_type __c) const
Translates a character into a case-insensitive equivalent.
Definition: regex.h:189
bool isctype(_Ch_type __c, char_class_type __f) const
Determines if c is a member of an identified class.
Definition: regex.tcc:382
match_results(const match_results &__rhs)
Copy constructs a match_results.
Definition: regex.h:1530
reference operator[](size_type __n) noexcept
Subscript access to the data contained in the vector.
Definition: stl_vector.h:765
bool operator==(const regex_token_iterator &__rhs) const
Compares a regex_token_iterator to another for equality.
Definition: regex.tcc:631
bool operator!=(const regex_token_iterator &__rhs) const
Compares a regex_token_iterator to another for inequality.
Definition: regex.h:2609
regex_iterator & operator=(const regex_iterator &__rhs)=default
Assigns one regex_iterator to another.
size_type size() const noexcept
Definition: stl_vector.h:640
iterator_traits< _InputIterator >::difference_type distance(_InputIterator __first, _InputIterator __last)
A generalization of pointer arithmetic.
difference_type length(size_type __sub=0) const
Gets the length of the indicated submatch.
Definition: regex.h:1627
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:501
regex_token_iterator operator++(int)
Postincrements a regex_token_iterator.
Definition: regex.h:2636
difference_type position(size_type __sub=0) const
Gets the offset of the beginning of the indicated submatch.
Definition: regex.h:1644
locale_type imbue(locale_type __loc)
Imbues the regex_traits object with a copy of a new locale.
Definition: regex.h:354
basic_regex & assign(initializer_list< _Ch_type > __l, flag_type __flags=ECMAScript)
Assigns a new regular expression to a regex object.
Definition: regex.h:676
basic_regex(const basic_regex &&__rhs) noexcept
Move-constructs a basic regular expression.
Definition: regex.h:465
const_iterator cbegin() const noexcept
Definition: stl_vector.h:606
basic_regex & operator=(basic_regex &&__rhs) noexcept
Move-assigns one regular expression to another.
Definition: regex.h:537
const value_type * operator->() const
Selects a regex_iterator member.
Definition: regex.h:2433
bool empty() const
Indicates if the match_results contains no results.
Definition: regex.h:1608
Facet for localized string comparison.
match_results & operator=(match_results &&__rhs)
Move-assigns rhs to *this.
Definition: regex.h:1555
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.
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:2552
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:2570
~basic_regex()
Destroys a basic regular expression.
Definition: regex.h:523
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:620
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:548
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:448
allocator_type get_allocator() const
Gets a copy of the allocator.
Definition: regex.h:1822
bool equal(_II1 __first1, _II1 __last1, _II2 __first2)
Tests a range for element-wise equality.
int compare(const string_type &__s) const
Compares this sub_match to a string.
Definition: regex.h:862
basic_regex< char > regex
Standard regular expressions.
Definition: regex.h:753
const value_type & operator*() const
Dereferences a regex_iterator.
Definition: regex.h:2426
Container class for localization functionality.The locale class is first a class wrapper for C librar...
_Tp * data() noexcept
Definition: stl_vector.h:876
regex_token_iterator(const regex_token_iterator &__rhs)
Copy constructs a regex_token_iterator.
Definition: regex.h:2583
const value_type & operator*() const
Dereferences a regex_token_iterator.
Definition: regex.h:2616
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:2519
regex_token_iterator()
Default constructs a regex_token_iterator.
Definition: regex.h:2497
const value_type * operator->() const
Selects a regex_token_iterator member.
Definition: regex.h:2623
const_reference suffix() const
Gets a sub_match representing the match suffix.
Definition: regex.h:1714
regex_token_iterator< const char * > cregex_token_iterator
Token iterator for C-style NULL-terminated strings.
Definition: regex.h:2673
_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:1776
basic_regex(const _Ch_type *__p, flag_type __f=ECMAScript)
Constructs a basic regular expression from the sequence [__p, __p + char_traits&lt;_Ch_type&gt;::length(__p...
Definition: regex.h:432
const_reference operator[](size_type __sub) const
Gets a sub_match reference for the match or submatch.
Definition: regex.h:1680
basic_regex & assign(const basic_string< _Ch_type, _Ch_typeraits, _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:636
basic_regex(initializer_list< _Ch_type > __l, flag_type __f=ECMAScript)
Constructs a basic regular expression from an initializer list.
Definition: regex.h:516
string_type transform(_Fwd_iter __first, _Fwd_iter __last) const
Gets a sort key for a character sequence.
Definition: regex.h:218
Class regex_traits. Describes aspects of a regular expression.
Definition: regex.h:72
const_iterator cbegin() const
Gets an iterator to the start of the sub_match collection.
Definition: regex.h:1733
sub_match< wstring::const_iterator > wssub_match
Regex submatch over a standard wide string.
Definition: regex.h:891
syntax_option_type
This is a bitmask type indicating how to interpret the regex.
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:2535
bool ready() const
Indicates if the match_results is ready.
Definition: regex.h:1575
string_type lookup_collatename(_Fwd_iter __first, _Fwd_iter __last) const
Gets a collation element by name.
const_iterator end() const
Gets an iterator to one-past-the-end of the collection.
Definition: regex.h:1740
size_type size() const
Gets the number of matches and submatches.
Definition: regex.h:1592
Basis for explicit traits specializations.
Definition: char_traits.h:227
bool operator!=(const regex_iterator &__rhs) const
Tests the inequivalence of two regex iterators.
Definition: regex.h:2419
A smart pointer with reference-counted copy semantics.
Definition: shared_ptr.h:93
constexpr const _Tp * end(initializer_list< _Tp > __ils) noexcept
Return an iterator pointing to one past the last element of the initializer_list. ...
const_reference prefix() const
Gets a sub_match representing the match prefix.
Definition: regex.h:1697
locale_type getloc() const
Gets a copy of the current locale in use by the regex_traits object.
Definition: regex.h:365
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:481
void swap(function< _Res(_Args...)> &__x, function< _Res(_Args...)> &__y)
Swap the targets of two polymorphic function object wrappers.
Definition: functional:2534
flag_type flags() const
Gets the flags used to construct the regular expression or in the last call to assign().
Definition: regex.h:693
basic_regex< wchar_t > wregex
Standard wide-character regular expressions.
Definition: regex.h:757
basic_regex & operator=(const basic_regex &__rhs)
Assigns one regular expression to another.
Definition: regex.h:530
initializer_list
const_iterator cend() const noexcept
Definition: stl_vector.h:615
int compare(const basic_string &__str) const
Compare to a string.
regex_token_iterator< const wchar_t * > wcregex_token_iterator
Token iterator for C-style NULL-terminated wide strings.
Definition: regex.h:2680
const_iterator cend() const
Gets an iterator to one-past-the-end of the collection.
Definition: regex.h:1747
bitset< _Nb > operator&(const bitset< _Nb > &__x, const bitset< _Nb > &__y) noexcept
Global bitwise operations on bitsets.
Definition: bitset:1426
_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
regex_iterator & operator++()
Increments a regex_iterator.
Definition: regex.tcc:558
_Siter_base< _Iterator >::iterator_type __base(_Iterator __it)
Definition: functions.h:558
regex_iterator operator++(int)
Postincrements a regex_iterator.
Definition: regex.h:2446
A standard container which offers fixed time access to individual elements in any order...
Definition: stl_vector.h:210
Managing sequences of characters and character-like objects.
Definition: basic_string.h:112
int value(_Ch_type __ch, int __radix) const
Converts a digit to an int.
Definition: regex.tcc:400
bool operator==(const regex_iterator &__rhs) const
Tests the equivalence of two regex iterators.
Definition: regex.tcc:543
match_results(match_results &&__rhs) noexcept
Move constructs a match_results.
Definition: regex.h:1537
back_insert_iterator< _Container > back_inserter(_Container &__x)
Definition: stl_iterator.h:480
bitset< _Nb > operator^(const bitset< _Nb > &__x, const bitset< _Nb > &__y) noexcept
Global bitwise operations on bitsets.
Definition: bitset:1444
string_type str() const
Gets the matching sequence as a string.
Definition: regex.h:832
regex_iterator()
Provides a singular iterator, useful for indicating one-past-the-end of a range.
Definition: regex.h:2378
unsigned int mark_count() const
Gets the number of marked subexpressions within the regular expression.
Definition: regex.h:685
string_type format(const char_type *__fmt, match_flag_type __flags=regex_constants::format_default) const
Definition: regex.h:1800
const_iterator begin() const
Gets an iterator to the start of the sub_match collection.
Definition: regex.h:1726
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:2389
sub_match< const wchar_t * > wcsub_match
Regex submatch over a C-style null-terminated wide string.
Definition: regex.h:888
__size_type size_type
The allocator&#39;s size type.