1 | // class template regex -*- C++ -*- |
2 | |
3 | // Copyright (C) 2010-2021 Free Software Foundation, Inc. |
4 | // |
5 | // This file is part of the GNU ISO C++ Library. This library is free |
6 | // software; you can redistribute it and/or modify it under the |
7 | // terms of the GNU General Public License as published by the |
8 | // Free Software Foundation; either version 3, or (at your option) |
9 | // any later version. |
10 | |
11 | // This library is distributed in the hope that it will be useful, |
12 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | // GNU General Public License for more details. |
15 | |
16 | // Under Section 7 of GPL version 3, you are granted additional |
17 | // permissions described in the GCC Runtime Library Exception, version |
18 | // 3.1, as published by the Free Software Foundation. |
19 | |
20 | // You should have received a copy of the GNU General Public License and |
21 | // a copy of the GCC Runtime Library Exception along with this program; |
22 | // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
23 | // <http://www.gnu.org/licenses/>. |
24 | |
25 | /** |
26 | * @file bits/regex.h |
27 | * This is an internal header file, included by other library headers. |
28 | * Do not attempt to use it directly. @headername{regex} |
29 | */ |
30 | |
31 | namespace std _GLIBCXX_VISIBILITY(default) |
32 | { |
33 | _GLIBCXX_BEGIN_NAMESPACE_VERSION |
34 | _GLIBCXX_BEGIN_NAMESPACE_CXX11 |
35 | template<typename, typename> |
36 | class basic_regex; |
37 | |
38 | template<typename, typename> |
39 | class match_results; |
40 | |
41 | _GLIBCXX_END_NAMESPACE_CXX11 |
42 | |
43 | namespace __detail |
44 | { |
45 | enum class _RegexExecutorPolicy : int { _S_auto, _S_alternate }; |
46 | |
47 | template<typename _BiIter, typename _Alloc, |
48 | typename _CharT, typename _TraitsT, |
49 | _RegexExecutorPolicy __policy, |
50 | bool __match_mode> |
51 | bool |
52 | __regex_algo_impl(_BiIter __s, |
53 | _BiIter __e, |
54 | match_results<_BiIter, _Alloc>& __m, |
55 | const basic_regex<_CharT, _TraitsT>& __re, |
56 | regex_constants::match_flag_type __flags); |
57 | |
58 | template<typename, typename, typename, bool> |
59 | class _Executor; |
60 | } |
61 | |
62 | _GLIBCXX_BEGIN_NAMESPACE_CXX11 |
63 | |
64 | /** |
65 | * @addtogroup regex |
66 | * @{ |
67 | */ |
68 | |
69 | /** |
70 | * @brief Describes aspects of a regular expression. |
71 | * |
72 | * A regular expression traits class that satisfies the requirements of |
73 | * section [28.7]. |
74 | * |
75 | * The class %regex is parameterized around a set of related types and |
76 | * functions used to complete the definition of its semantics. This class |
77 | * satisfies the requirements of such a traits class. |
78 | */ |
79 | template<typename _Ch_type> |
80 | class regex_traits |
81 | { |
82 | public: |
83 | typedef _Ch_type char_type; |
84 | typedef std::basic_string<char_type> string_type; |
85 | typedef std::locale locale_type; |
86 | |
87 | private: |
88 | struct _RegexMask |
89 | { |
90 | typedef std::ctype_base::mask _BaseType; |
91 | _BaseType _M_base; |
92 | unsigned char _M_extended; |
93 | static constexpr unsigned char _S_under = 1 << 0; |
94 | static constexpr unsigned char _S_valid_mask = 0x1; |
95 | |
96 | constexpr _RegexMask(_BaseType __base = 0, |
97 | unsigned char __extended = 0) |
98 | : _M_base(__base), _M_extended(__extended) |
99 | { } |
100 | |
101 | constexpr _RegexMask |
102 | operator&(_RegexMask __other) const |
103 | { |
104 | return _RegexMask(_M_base & __other._M_base, |
105 | _M_extended & __other._M_extended); |
106 | } |
107 | |
108 | constexpr _RegexMask |
109 | operator|(_RegexMask __other) const |
110 | { |
111 | return _RegexMask(_M_base | __other._M_base, |
112 | _M_extended | __other._M_extended); |
113 | } |
114 | |
115 | constexpr _RegexMask |
116 | operator^(_RegexMask __other) const |
117 | { |
118 | return _RegexMask(_M_base ^ __other._M_base, |
119 | _M_extended ^ __other._M_extended); |
120 | } |
121 | |
122 | constexpr _RegexMask |
123 | operator~() const |
124 | { return _RegexMask(~_M_base, ~_M_extended); } |
125 | |
126 | _RegexMask& |
127 | operator&=(_RegexMask __other) |
128 | { return *this = (*this) & __other; } |
129 | |
130 | _RegexMask& |
131 | operator|=(_RegexMask __other) |
132 | { return *this = (*this) | __other; } |
133 | |
134 | _RegexMask& |
135 | operator^=(_RegexMask __other) |
136 | { return *this = (*this) ^ __other; } |
137 | |
138 | constexpr bool |
139 | operator==(_RegexMask __other) const |
140 | { |
141 | return (_M_extended & _S_valid_mask) |
142 | == (__other._M_extended & _S_valid_mask) |
143 | && _M_base == __other._M_base; |
144 | } |
145 | |
146 | #if __cpp_impl_three_way_comparison < 201907L |
147 | constexpr bool |
148 | operator!=(_RegexMask __other) const |
149 | { return !((*this) == __other); } |
150 | #endif |
151 | }; |
152 | |
153 | public: |
154 | typedef _RegexMask char_class_type; |
155 | |
156 | public: |
157 | /** |
158 | * @brief Constructs a default traits object. |
159 | */ |
160 | regex_traits() { } |
161 | |
162 | /** |
163 | * @brief Gives the length of a C-style string starting at @p __p. |
164 | * |
165 | * @param __p a pointer to the start of a character sequence. |
166 | * |
167 | * @returns the number of characters between @p *__p and the first |
168 | * default-initialized value of type @p char_type. In other words, uses |
169 | * the C-string algorithm for determining the length of a sequence of |
170 | * characters. |
171 | */ |
172 | static std::size_t |
173 | length(const char_type* __p) |
174 | { return string_type::traits_type::length(__p); } |
175 | |
176 | /** |
177 | * @brief Performs the identity translation. |
178 | * |
179 | * @param __c A character to the locale-specific character set. |
180 | * |
181 | * @returns __c. |
182 | */ |
183 | char_type |
184 | translate(char_type __c) const |
185 | { return __c; } |
186 | |
187 | /** |
188 | * @brief Translates a character into a case-insensitive equivalent. |
189 | * |
190 | * @param __c A character to the locale-specific character set. |
191 | * |
192 | * @returns the locale-specific lower-case equivalent of __c. |
193 | * @throws std::bad_cast if the imbued locale does not support the ctype |
194 | * facet. |
195 | */ |
196 | char_type |
197 | translate_nocase(char_type __c) const |
198 | { |
199 | typedef std::ctype<char_type> __ctype_type; |
200 | const __ctype_type& __fctyp(use_facet<__ctype_type>(_M_locale)); |
201 | return __fctyp.tolower(__c); |
202 | } |
203 | |
204 | /** |
205 | * @brief Gets a sort key for a character sequence. |
206 | * |
207 | * @param __first beginning of the character sequence. |
208 | * @param __last one-past-the-end of the character sequence. |
209 | * |
210 | * Returns a sort key for the character sequence designated by the |
211 | * iterator range [F1, F2) such that if the character sequence [G1, G2) |
212 | * sorts before the character sequence [H1, H2) then |
213 | * v.transform(G1, G2) < v.transform(H1, H2). |
214 | * |
215 | * What this really does is provide a more efficient way to compare a |
216 | * string to multiple other strings in locales with fancy collation |
217 | * rules and equivalence classes. |
218 | * |
219 | * @returns a locale-specific sort key equivalent to the input range. |
220 | * |
221 | * @throws std::bad_cast if the current locale does not have a collate |
222 | * facet. |
223 | */ |
224 | template<typename _Fwd_iter> |
225 | string_type |
226 | transform(_Fwd_iter __first, _Fwd_iter __last) const |
227 | { |
228 | typedef std::collate<char_type> __collate_type; |
229 | const __collate_type& __fclt(use_facet<__collate_type>(_M_locale)); |
230 | string_type __s(__first, __last); |
231 | return __fclt.transform(__s.data(), __s.data() + __s.size()); |
232 | } |
233 | |
234 | /** |
235 | * @brief Gets a sort key for a character sequence, independent of case. |
236 | * |
237 | * @param __first beginning of the character sequence. |
238 | * @param __last one-past-the-end of the character sequence. |
239 | * |
240 | * Effects: if typeid(use_facet<collate<_Ch_type> >) == |
241 | * typeid(collate_byname<_Ch_type>) and the form of the sort key |
242 | * returned by collate_byname<_Ch_type>::transform(__first, __last) |
243 | * is known and can be converted into a primary sort key |
244 | * then returns that key, otherwise returns an empty string. |
245 | * |
246 | * @todo Implement this function correctly. |
247 | */ |
248 | template<typename _Fwd_iter> |
249 | string_type |
250 | transform_primary(_Fwd_iter __first, _Fwd_iter __last) const |
251 | { |
252 | // TODO : this is not entirely correct. |
253 | // This function requires extra support from the platform. |
254 | // |
255 | // Read http://gcc.gnu.org/ml/libstdc++/2013-09/msg00117.html and |
256 | // http://www.open-std.org/Jtc1/sc22/wg21/docs/papers/2003/n1429.htm |
257 | // for details. |
258 | typedef std::ctype<char_type> __ctype_type; |
259 | const __ctype_type& __fctyp(use_facet<__ctype_type>(_M_locale)); |
260 | std::vector<char_type> __s(__first, __last); |
261 | __fctyp.tolower(__s.data(), __s.data() + __s.size()); |
262 | return this->transform(__s.data(), __s.data() + __s.size()); |
263 | } |
264 | |
265 | /** |
266 | * @brief Gets a collation element by name. |
267 | * |
268 | * @param __first beginning of the collation element name. |
269 | * @param __last one-past-the-end of the collation element name. |
270 | * |
271 | * @returns a sequence of one or more characters that represents the |
272 | * collating element consisting of the character sequence designated by |
273 | * the iterator range [__first, __last). Returns an empty string if the |
274 | * character sequence is not a valid collating element. |
275 | */ |
276 | template<typename _Fwd_iter> |
277 | string_type |
278 | lookup_collatename(_Fwd_iter __first, _Fwd_iter __last) const; |
279 | |
280 | /** |
281 | * @brief Maps one or more characters to a named character |
282 | * classification. |
283 | * |
284 | * @param __first beginning of the character sequence. |
285 | * @param __last one-past-the-end of the character sequence. |
286 | * @param __icase ignores the case of the classification name. |
287 | * |
288 | * @returns an unspecified value that represents the character |
289 | * classification named by the character sequence designated by |
290 | * the iterator range [__first, __last). If @p icase is true, |
291 | * the returned mask identifies the classification regardless of |
292 | * the case of the characters to be matched (for example, |
293 | * [[:lower:]] is the same as [[:alpha:]]), otherwise a |
294 | * case-dependent classification is returned. The value |
295 | * returned shall be independent of the case of the characters |
296 | * in the character sequence. If the name is not recognized then |
297 | * returns a value that compares equal to 0. |
298 | * |
299 | * At least the following names (or their wide-character equivalent) are |
300 | * supported. |
301 | * - d |
302 | * - w |
303 | * - s |
304 | * - alnum |
305 | * - alpha |
306 | * - blank |
307 | * - cntrl |
308 | * - digit |
309 | * - graph |
310 | * - lower |
311 | * - print |
312 | * - punct |
313 | * - space |
314 | * - upper |
315 | * - xdigit |
316 | */ |
317 | template<typename _Fwd_iter> |
318 | char_class_type |
319 | lookup_classname(_Fwd_iter __first, _Fwd_iter __last, |
320 | bool __icase = false) const; |
321 | |
322 | /** |
323 | * @brief Determines if @p c is a member of an identified class. |
324 | * |
325 | * @param __c a character. |
326 | * @param __f a class type (as returned from lookup_classname). |
327 | * |
328 | * @returns true if the character @p __c is a member of the classification |
329 | * represented by @p __f, false otherwise. |
330 | * |
331 | * @throws std::bad_cast if the current locale does not have a ctype |
332 | * facet. |
333 | */ |
334 | bool |
335 | isctype(_Ch_type __c, char_class_type __f) const; |
336 | |
337 | /** |
338 | * @brief Converts a digit to an int. |
339 | * |
340 | * @param __ch a character representing a digit. |
341 | * @param __radix the radix if the numeric conversion (limited to 8, 10, |
342 | * or 16). |
343 | * |
344 | * @returns the value represented by the digit __ch in base radix if the |
345 | * character __ch is a valid digit in base radix; otherwise returns -1. |
346 | */ |
347 | int |
348 | value(_Ch_type __ch, int __radix) const; |
349 | |
350 | /** |
351 | * @brief Imbues the regex_traits object with a copy of a new locale. |
352 | * |
353 | * @param __loc A locale. |
354 | * |
355 | * @returns a copy of the previous locale in use by the regex_traits |
356 | * object. |
357 | * |
358 | * @note Calling imbue with a different locale than the one currently in |
359 | * use invalidates all cached data held by *this. |
360 | */ |
361 | locale_type |
362 | imbue(locale_type __loc) |
363 | { |
364 | std::swap(_M_locale, __loc); |
365 | return __loc; |
366 | } |
367 | |
368 | /** |
369 | * @brief Gets a copy of the current locale in use by the regex_traits |
370 | * object. |
371 | */ |
372 | locale_type |
373 | getloc() const |
374 | { return _M_locale; } |
375 | |
376 | protected: |
377 | locale_type _M_locale; |
378 | }; |
379 | |
380 | // [7.8] Class basic_regex |
381 | /** |
382 | * Objects of specializations of this class represent regular expressions |
383 | * constructed from sequences of character type @p _Ch_type. |
384 | * |
385 | * Storage for the regular expression is allocated and deallocated as |
386 | * necessary by the member functions of this class. |
387 | */ |
388 | template<typename _Ch_type, typename _Rx_traits = regex_traits<_Ch_type>> |
389 | class basic_regex |
390 | { |
391 | public: |
392 | static_assert(is_same<_Ch_type, typename _Rx_traits::char_type>::value, |
393 | "regex traits class must have the same char_type" ); |
394 | |
395 | // types: |
396 | typedef _Ch_type value_type; |
397 | typedef _Rx_traits traits_type; |
398 | typedef typename traits_type::string_type string_type; |
399 | typedef regex_constants::syntax_option_type flag_type; |
400 | typedef typename traits_type::locale_type locale_type; |
401 | |
402 | /** |
403 | * @name Constants |
404 | * std [28.8.1](1) |
405 | */ |
406 | ///@{ |
407 | static constexpr flag_type icase = regex_constants::icase; |
408 | static constexpr flag_type nosubs = regex_constants::nosubs; |
409 | static constexpr flag_type optimize = regex_constants::optimize; |
410 | static constexpr flag_type collate = regex_constants::collate; |
411 | static constexpr flag_type ECMAScript = regex_constants::ECMAScript; |
412 | static constexpr flag_type basic = regex_constants::basic; |
413 | static constexpr flag_type extended = regex_constants::extended; |
414 | static constexpr flag_type awk = regex_constants::awk; |
415 | static constexpr flag_type grep = regex_constants::grep; |
416 | static constexpr flag_type egrep = regex_constants::egrep; |
417 | ///@} |
418 | |
419 | // [7.8.2] construct/copy/destroy |
420 | /** |
421 | * Constructs a basic regular expression that does not match any |
422 | * character sequence. |
423 | */ |
424 | basic_regex() |
425 | : _M_flags(ECMAScript), _M_loc(), _M_automaton(nullptr) |
426 | { } |
427 | |
428 | /** |
429 | * @brief Constructs a basic regular expression from the |
430 | * sequence [__p, __p + char_traits<_Ch_type>::length(__p)) |
431 | * interpreted according to the flags in @p __f. |
432 | * |
433 | * @param __p A pointer to the start of a C-style null-terminated string |
434 | * containing a regular expression. |
435 | * @param __f Flags indicating the syntax rules and options. |
436 | * |
437 | * @throws regex_error if @p __p is not a valid regular expression. |
438 | */ |
439 | explicit |
440 | basic_regex(const _Ch_type* __p, flag_type __f = ECMAScript) |
441 | : basic_regex(__p, __p + char_traits<_Ch_type>::length(__p), __f) |
442 | { } |
443 | |
444 | /** |
445 | * @brief Constructs a basic regular expression from the sequence |
446 | * [p, p + len) interpreted according to the flags in @p f. |
447 | * |
448 | * @param __p A pointer to the start of a string containing a regular |
449 | * expression. |
450 | * @param __len The length of the string containing the regular |
451 | * expression. |
452 | * @param __f Flags indicating the syntax rules and options. |
453 | * |
454 | * @throws regex_error if @p __p is not a valid regular expression. |
455 | */ |
456 | basic_regex(const _Ch_type* __p, std::size_t __len, |
457 | flag_type __f = ECMAScript) |
458 | : basic_regex(__p, __p + __len, __f) |
459 | { } |
460 | |
461 | /** |
462 | * @brief Copy-constructs a basic regular expression. |
463 | * |
464 | * @param __rhs A @p regex object. |
465 | */ |
466 | basic_regex(const basic_regex& __rhs) = default; |
467 | |
468 | /** |
469 | * @brief Move-constructs a basic regular expression. |
470 | * |
471 | * @param __rhs A @p regex object. |
472 | */ |
473 | basic_regex(basic_regex&& __rhs) noexcept = default; |
474 | |
475 | /** |
476 | * @brief Constructs a basic regular expression from the string |
477 | * @p s interpreted according to the flags in @p f. |
478 | * |
479 | * @param __s A string containing a regular expression. |
480 | * @param __f Flags indicating the syntax rules and options. |
481 | * |
482 | * @throws regex_error if @p __s is not a valid regular expression. |
483 | */ |
484 | template<typename _Ch_traits, typename _Ch_alloc> |
485 | explicit |
486 | basic_regex(const std::basic_string<_Ch_type, _Ch_traits, |
487 | _Ch_alloc>& __s, |
488 | flag_type __f = ECMAScript) |
489 | : basic_regex(__s.data(), __s.data() + __s.size(), __f) |
490 | { } |
491 | |
492 | /** |
493 | * @brief Constructs a basic regular expression from the range |
494 | * [first, last) interpreted according to the flags in @p f. |
495 | * |
496 | * @param __first The start of a range containing a valid regular |
497 | * expression. |
498 | * @param __last The end of a range containing a valid regular |
499 | * expression. |
500 | * @param __f The format flags of the regular expression. |
501 | * |
502 | * @throws regex_error if @p [__first, __last) is not a valid regular |
503 | * expression. |
504 | */ |
505 | template<typename _FwdIter> |
506 | basic_regex(_FwdIter __first, _FwdIter __last, |
507 | flag_type __f = ECMAScript) |
508 | : basic_regex(std::move(__first), std::move(__last), locale_type(), __f) |
509 | { } |
510 | |
511 | /** |
512 | * @brief Constructs a basic regular expression from an initializer list. |
513 | * |
514 | * @param __l The initializer list. |
515 | * @param __f The format flags of the regular expression. |
516 | * |
517 | * @throws regex_error if @p __l is not a valid regular expression. |
518 | */ |
519 | basic_regex(initializer_list<_Ch_type> __l, flag_type __f = ECMAScript) |
520 | : basic_regex(__l.begin(), __l.end(), __f) |
521 | { } |
522 | |
523 | /** |
524 | * @brief Destroys a basic regular expression. |
525 | */ |
526 | ~basic_regex() |
527 | { } |
528 | |
529 | /** |
530 | * @brief Assigns one regular expression to another. |
531 | */ |
532 | basic_regex& |
533 | operator=(const basic_regex& __rhs) |
534 | { return this->assign(__rhs); } |
535 | |
536 | /** |
537 | * @brief Move-assigns one regular expression to another. |
538 | */ |
539 | basic_regex& |
540 | operator=(basic_regex&& __rhs) noexcept |
541 | { return this->assign(std::move(__rhs)); } |
542 | |
543 | /** |
544 | * @brief Replaces a regular expression with a new one constructed from |
545 | * a C-style null-terminated string. |
546 | * |
547 | * @param __p A pointer to the start of a null-terminated C-style string |
548 | * containing a regular expression. |
549 | */ |
550 | basic_regex& |
551 | operator=(const _Ch_type* __p) |
552 | { return this->assign(__p); } |
553 | |
554 | /** |
555 | * @brief Replaces a regular expression with a new one constructed from |
556 | * an initializer list. |
557 | * |
558 | * @param __l The initializer list. |
559 | * |
560 | * @throws regex_error if @p __l is not a valid regular expression. |
561 | */ |
562 | basic_regex& |
563 | operator=(initializer_list<_Ch_type> __l) |
564 | { return this->assign(__l.begin(), __l.end()); } |
565 | |
566 | /** |
567 | * @brief Replaces a regular expression with a new one constructed from |
568 | * a string. |
569 | * |
570 | * @param __s A pointer to a string containing a regular expression. |
571 | */ |
572 | template<typename _Ch_traits, typename _Alloc> |
573 | basic_regex& |
574 | operator=(const basic_string<_Ch_type, _Ch_traits, _Alloc>& __s) |
575 | { return this->assign(__s); } |
576 | |
577 | // [7.8.3] assign |
578 | /** |
579 | * @brief the real assignment operator. |
580 | * |
581 | * @param __rhs Another regular expression object. |
582 | */ |
583 | basic_regex& |
584 | assign(const basic_regex& __rhs) |
585 | { |
586 | basic_regex __tmp(__rhs); |
587 | this->swap(__tmp); |
588 | return *this; |
589 | } |
590 | |
591 | /** |
592 | * @brief The move-assignment operator. |
593 | * |
594 | * @param __rhs Another regular expression object. |
595 | */ |
596 | basic_regex& |
597 | assign(basic_regex&& __rhs) noexcept |
598 | { |
599 | basic_regex __tmp(std::move(__rhs)); |
600 | this->swap(__tmp); |
601 | return *this; |
602 | } |
603 | |
604 | /** |
605 | * @brief Assigns a new regular expression to a regex object from a |
606 | * C-style null-terminated string containing a regular expression |
607 | * pattern. |
608 | * |
609 | * @param __p A pointer to a C-style null-terminated string containing |
610 | * a regular expression pattern. |
611 | * @param __flags Syntax option flags. |
612 | * |
613 | * @throws regex_error if __p does not contain a valid regular |
614 | * expression pattern interpreted according to @p __flags. If |
615 | * regex_error is thrown, *this remains unchanged. |
616 | */ |
617 | basic_regex& |
618 | assign(const _Ch_type* __p, flag_type __flags = ECMAScript) |
619 | { return this->assign(string_type(__p), __flags); } |
620 | |
621 | /** |
622 | * @brief Assigns a new regular expression to a regex object from a |
623 | * C-style string containing a regular expression pattern. |
624 | * |
625 | * @param __p A pointer to a C-style string containing a |
626 | * regular expression pattern. |
627 | * @param __len The length of the regular expression pattern string. |
628 | * @param __flags Syntax option flags. |
629 | * |
630 | * @throws regex_error if p 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 | // _GLIBCXX_RESOLVE_LIB_DEFECTS |
635 | // 3296. Inconsistent default argument for basic_regex<>::assign |
636 | basic_regex& |
637 | assign(const _Ch_type* __p, size_t __len, flag_type __flags = ECMAScript) |
638 | { return this->assign(string_type(__p, __len), __flags); } |
639 | |
640 | /** |
641 | * @brief Assigns a new regular expression to a regex object from a |
642 | * string containing a regular expression pattern. |
643 | * |
644 | * @param __s A string containing a regular expression pattern. |
645 | * @param __flags Syntax option flags. |
646 | * |
647 | * @throws regex_error if __s does not contain a valid regular |
648 | * expression pattern interpreted according to @p __flags. If |
649 | * regex_error is thrown, *this remains unchanged. |
650 | */ |
651 | template<typename _Ch_traits, typename _Alloc> |
652 | basic_regex& |
653 | assign(const basic_string<_Ch_type, _Ch_traits, _Alloc>& __s, |
654 | flag_type __flags = ECMAScript) |
655 | { |
656 | return this->assign(basic_regex(__s.data(), __s.data() + __s.size(), |
657 | _M_loc, __flags)); |
658 | } |
659 | |
660 | /** |
661 | * @brief Assigns a new regular expression to a regex object. |
662 | * |
663 | * @param __first The start of a range containing a valid regular |
664 | * expression. |
665 | * @param __last The end of a range containing a valid regular |
666 | * expression. |
667 | * @param __flags Syntax option flags. |
668 | * |
669 | * @throws regex_error if p does not contain a valid regular |
670 | * expression pattern interpreted according to @p __flags. If |
671 | * regex_error is thrown, the object remains unchanged. |
672 | */ |
673 | template<typename _InputIterator> |
674 | basic_regex& |
675 | assign(_InputIterator __first, _InputIterator __last, |
676 | flag_type __flags = ECMAScript) |
677 | { return this->assign(string_type(__first, __last), __flags); } |
678 | |
679 | /** |
680 | * @brief Assigns a new regular expression to a regex object. |
681 | * |
682 | * @param __l An initializer list representing a regular expression. |
683 | * @param __flags Syntax option flags. |
684 | * |
685 | * @throws regex_error if @p __l does not contain a valid |
686 | * regular expression pattern interpreted according to @p |
687 | * __flags. If regex_error is thrown, the object remains |
688 | * unchanged. |
689 | */ |
690 | basic_regex& |
691 | assign(initializer_list<_Ch_type> __l, flag_type __flags = ECMAScript) |
692 | { return this->assign(__l.begin(), __l.end(), __flags); } |
693 | |
694 | // [7.8.4] const operations |
695 | /** |
696 | * @brief Gets the number of marked subexpressions within the regular |
697 | * expression. |
698 | */ |
699 | unsigned int |
700 | mark_count() const |
701 | { |
702 | if (_M_automaton) |
703 | return _M_automaton->_M_sub_count() - 1; |
704 | return 0; |
705 | } |
706 | |
707 | /** |
708 | * @brief Gets the flags used to construct the regular expression |
709 | * or in the last call to assign(). |
710 | */ |
711 | flag_type |
712 | flags() const |
713 | { return _M_flags; } |
714 | |
715 | // [7.8.5] locale |
716 | /** |
717 | * @brief Imbues the regular expression object with the given locale. |
718 | * |
719 | * @param __loc A locale. |
720 | */ |
721 | locale_type |
722 | imbue(locale_type __loc) |
723 | { |
724 | std::swap(__loc, _M_loc); |
725 | _M_automaton.reset(); |
726 | return __loc; |
727 | } |
728 | |
729 | /** |
730 | * @brief Gets the locale currently imbued in the regular expression |
731 | * object. |
732 | */ |
733 | locale_type |
734 | getloc() const |
735 | { return _M_loc; } |
736 | |
737 | // [7.8.6] swap |
738 | /** |
739 | * @brief Swaps the contents of two regular expression objects. |
740 | * |
741 | * @param __rhs Another regular expression object. |
742 | */ |
743 | void |
744 | swap(basic_regex& __rhs) |
745 | { |
746 | std::swap(_M_flags, __rhs._M_flags); |
747 | std::swap(_M_loc, __rhs._M_loc); |
748 | std::swap(_M_automaton, __rhs._M_automaton); |
749 | } |
750 | |
751 | #ifdef _GLIBCXX_DEBUG |
752 | void |
753 | _M_dot(std::ostream& __ostr) |
754 | { _M_automaton->_M_dot(__ostr); } |
755 | #endif |
756 | |
757 | private: |
758 | typedef std::shared_ptr<const __detail::_NFA<_Rx_traits>> _AutomatonPtr; |
759 | |
760 | template<typename _FwdIter> |
761 | basic_regex(_FwdIter __first, _FwdIter __last, locale_type __loc, |
762 | flag_type __f) |
763 | : _M_flags(__f), _M_loc(std::move(__loc)), |
764 | _M_automaton(__detail::__compile_nfa<_Rx_traits>( |
765 | std::move(__first), std::move(__last), _M_loc, _M_flags)) |
766 | { } |
767 | |
768 | template<typename _Bp, typename _Ap, typename _Cp, typename _Rp, |
769 | __detail::_RegexExecutorPolicy, bool> |
770 | friend bool |
771 | __detail::__regex_algo_impl(_Bp, _Bp, match_results<_Bp, _Ap>&, |
772 | const basic_regex<_Cp, _Rp>&, |
773 | regex_constants::match_flag_type); |
774 | |
775 | template<typename, typename, typename, bool> |
776 | friend class __detail::_Executor; |
777 | |
778 | flag_type _M_flags; |
779 | locale_type _M_loc; |
780 | _AutomatonPtr _M_automaton; |
781 | }; |
782 | |
783 | #if __cplusplus < 201703L |
784 | template<typename _Ch, typename _Tr> |
785 | constexpr regex_constants::syntax_option_type |
786 | basic_regex<_Ch, _Tr>::icase; |
787 | |
788 | template<typename _Ch, typename _Tr> |
789 | constexpr regex_constants::syntax_option_type |
790 | basic_regex<_Ch, _Tr>::nosubs; |
791 | |
792 | template<typename _Ch, typename _Tr> |
793 | constexpr regex_constants::syntax_option_type |
794 | basic_regex<_Ch, _Tr>::optimize; |
795 | |
796 | template<typename _Ch, typename _Tr> |
797 | constexpr regex_constants::syntax_option_type |
798 | basic_regex<_Ch, _Tr>::collate; |
799 | |
800 | template<typename _Ch, typename _Tr> |
801 | constexpr regex_constants::syntax_option_type |
802 | basic_regex<_Ch, _Tr>::ECMAScript; |
803 | |
804 | template<typename _Ch, typename _Tr> |
805 | constexpr regex_constants::syntax_option_type |
806 | basic_regex<_Ch, _Tr>::basic; |
807 | |
808 | template<typename _Ch, typename _Tr> |
809 | constexpr regex_constants::syntax_option_type |
810 | basic_regex<_Ch, _Tr>::extended; |
811 | |
812 | template<typename _Ch, typename _Tr> |
813 | constexpr regex_constants::syntax_option_type |
814 | basic_regex<_Ch, _Tr>::awk; |
815 | |
816 | template<typename _Ch, typename _Tr> |
817 | constexpr regex_constants::syntax_option_type |
818 | basic_regex<_Ch, _Tr>::grep; |
819 | |
820 | template<typename _Ch, typename _Tr> |
821 | constexpr regex_constants::syntax_option_type |
822 | basic_regex<_Ch, _Tr>::egrep; |
823 | #endif // ! C++17 |
824 | |
825 | #if __cpp_deduction_guides >= 201606 |
826 | template<typename _ForwardIterator> |
827 | basic_regex(_ForwardIterator, _ForwardIterator, |
828 | regex_constants::syntax_option_type = {}) |
829 | -> basic_regex<typename iterator_traits<_ForwardIterator>::value_type>; |
830 | #endif |
831 | |
832 | /** @brief Standard regular expressions. */ |
833 | typedef basic_regex<char> regex; |
834 | |
835 | #ifdef _GLIBCXX_USE_WCHAR_T |
836 | /** @brief Standard wide-character regular expressions. */ |
837 | typedef basic_regex<wchar_t> wregex; |
838 | #endif |
839 | |
840 | |
841 | // [7.8.6] basic_regex swap |
842 | /** |
843 | * @brief Swaps the contents of two regular expression objects. |
844 | * @param __lhs First regular expression. |
845 | * @param __rhs Second regular expression. |
846 | * @relates basic_regex |
847 | */ |
848 | template<typename _Ch_type, typename _Rx_traits> |
849 | inline void |
850 | swap(basic_regex<_Ch_type, _Rx_traits>& __lhs, |
851 | basic_regex<_Ch_type, _Rx_traits>& __rhs) |
852 | { __lhs.swap(__rhs); } |
853 | |
854 | |
855 | // C++11 28.9 [re.submatch] Class template sub_match |
856 | /** |
857 | * A sequence of characters matched by a particular marked sub-expression. |
858 | * |
859 | * An object of this class is essentially a pair of iterators marking a |
860 | * matched subexpression within a regular expression pattern match. Such |
861 | * objects can be converted to and compared with std::basic_string objects |
862 | * of a similar base character type as the pattern matched by the regular |
863 | * expression. |
864 | * |
865 | * The iterators that make up the pair are the usual half-open interval |
866 | * referencing the actual original pattern matched. |
867 | */ |
868 | template<typename _BiIter> |
869 | class sub_match : public std::pair<_BiIter, _BiIter> |
870 | { |
871 | typedef iterator_traits<_BiIter> __iter_traits; |
872 | |
873 | public: |
874 | typedef typename __iter_traits::value_type value_type; |
875 | typedef typename __iter_traits::difference_type difference_type; |
876 | typedef _BiIter iterator; |
877 | typedef basic_string<value_type> string_type; |
878 | |
879 | bool matched; |
880 | |
881 | constexpr sub_match() noexcept : matched() { } |
882 | |
883 | /// Gets the length of the matching sequence. |
884 | difference_type |
885 | length() const noexcept |
886 | { return this->matched ? std::distance(this->first, this->second) : 0; } |
887 | |
888 | /** |
889 | * @brief Gets the matching sequence as a string. |
890 | * |
891 | * @returns the matching sequence as a string. |
892 | * |
893 | * This is the implicit conversion operator. It is identical to the |
894 | * str() member function except that it will want to pop up in |
895 | * unexpected places and cause a great deal of confusion and cursing |
896 | * from the unwary. |
897 | */ |
898 | operator string_type() const |
899 | { return str(); } |
900 | |
901 | /** |
902 | * @brief Gets the matching sequence as a string. |
903 | * |
904 | * @returns the matching sequence as a string. |
905 | */ |
906 | string_type |
907 | str() const |
908 | { |
909 | return this->matched |
910 | ? string_type(this->first, this->second) |
911 | : string_type(); |
912 | } |
913 | |
914 | /** |
915 | * @brief Compares this and another matched sequence. |
916 | * |
917 | * @param __s Another matched sequence to compare to this one. |
918 | * |
919 | * @retval negative This matched sequence will collate before `__s`. |
920 | * @retval zero This matched sequence is equivalent to `__s`. |
921 | * @retval positive This matched sequence will collate after `__s`. |
922 | */ |
923 | int |
924 | compare(const sub_match& __s) const |
925 | { return this->_M_str().compare(__s._M_str()); } |
926 | |
927 | /** |
928 | * @{ |
929 | * @brief Compares this `sub_match` to a string. |
930 | * |
931 | * @param __s A string to compare to this `sub_match`. |
932 | * |
933 | * @retval negative This matched sequence will collate before `__s`. |
934 | * @retval zero This matched sequence is equivalent to `__s`. |
935 | * @retval positive This matched sequence will collate after `__s`. |
936 | */ |
937 | int |
938 | compare(const string_type& __s) const |
939 | { return this->_M_str().compare(__s); } |
940 | |
941 | int |
942 | compare(const value_type* __s) const |
943 | { return this->_M_str().compare(__s); } |
944 | /// @} |
945 | |
946 | /// @cond undocumented |
947 | // Non-standard, used by comparison operators |
948 | int |
949 | _M_compare(const value_type* __s, size_t __n) const |
950 | { return this->_M_str().compare({__s, __n}); } |
951 | /// @endcond |
952 | |
953 | private: |
954 | // Simplified basic_string_view for C++11 |
955 | struct __string_view |
956 | { |
957 | using traits_type = typename string_type::traits_type; |
958 | |
959 | __string_view() = default; |
960 | |
961 | __string_view(const value_type* __s, size_t __n) noexcept |
962 | : _M_data(__s), _M_len(__n) { } |
963 | |
964 | __string_view(const value_type* __s) noexcept |
965 | : _M_data(__s), _M_len(traits_type::length(__s)) { } |
966 | |
967 | __string_view(const string_type& __s) noexcept |
968 | : _M_data(__s.data()), _M_len(__s.length()) { } |
969 | |
970 | int |
971 | compare(__string_view __s) const noexcept |
972 | { |
973 | if (const size_t __n = std::min(_M_len, __s._M_len)) |
974 | if (int __ret = traits_type::compare(_M_data, __s._M_data, __n)) |
975 | return __ret; |
976 | using __limits = __gnu_cxx::__int_traits<int>; |
977 | const difference_type __diff = _M_len - __s._M_len; |
978 | if (__diff > __limits::__max) |
979 | return __limits::__max; |
980 | if (__diff < __limits::__min) |
981 | return __limits::__min; |
982 | return static_cast<int>(__diff); |
983 | } |
984 | |
985 | private: |
986 | const value_type* _M_data = nullptr; |
987 | size_t _M_len = 0; |
988 | }; |
989 | |
990 | // Create a __string_view over the iterator range. |
991 | template<typename _Iter = _BiIter> |
992 | __enable_if_t<__detail::__is_contiguous_iter<_Iter>::value, |
993 | __string_view> |
994 | _M_str() const noexcept |
995 | { |
996 | if (this->matched) |
997 | if (size_t __len = this->second - this->first) |
998 | return { std::__addressof(*this->first), __len }; |
999 | return {}; |
1000 | } |
1001 | |
1002 | // Create a temporary string that can be converted to __string_view. |
1003 | template<typename _Iter = _BiIter> |
1004 | __enable_if_t<!__detail::__is_contiguous_iter<_Iter>::value, |
1005 | string_type> |
1006 | _M_str() const |
1007 | { return str(); } |
1008 | }; |
1009 | |
1010 | |
1011 | /** @brief Standard regex submatch over a C-style null-terminated string. */ |
1012 | typedef sub_match<const char*> csub_match; |
1013 | |
1014 | /** @brief Standard regex submatch over a standard string. */ |
1015 | typedef sub_match<string::const_iterator> ssub_match; |
1016 | |
1017 | #ifdef _GLIBCXX_USE_WCHAR_T |
1018 | /** @brief Regex submatch over a C-style null-terminated wide string. */ |
1019 | typedef sub_match<const wchar_t*> wcsub_match; |
1020 | |
1021 | /** @brief Regex submatch over a standard wide string. */ |
1022 | typedef sub_match<wstring::const_iterator> wssub_match; |
1023 | #endif |
1024 | |
1025 | // [7.9.2] sub_match non-member operators |
1026 | |
1027 | /// @relates sub_match @{ |
1028 | |
1029 | /** |
1030 | * @brief Tests the equivalence of two regular expression submatches. |
1031 | * @param __lhs First regular expression submatch. |
1032 | * @param __rhs Second regular expression submatch. |
1033 | * @returns true if @a __lhs is equivalent to @a __rhs, false otherwise. |
1034 | */ |
1035 | template<typename _BiIter> |
1036 | inline bool |
1037 | operator==(const sub_match<_BiIter>& __lhs, const sub_match<_BiIter>& __rhs) |
1038 | { return __lhs.compare(__rhs) == 0; } |
1039 | |
1040 | #if __cpp_lib_three_way_comparison |
1041 | /** |
1042 | * @brief Three-way comparison of two regular expression submatches. |
1043 | * @param __lhs First regular expression submatch. |
1044 | * @param __rhs Second regular expression submatch. |
1045 | * @returns A value indicating whether `__lhs` is less than, equal to, |
1046 | * greater than, or incomparable with `__rhs`. |
1047 | */ |
1048 | template<typename _BiIter> |
1049 | inline auto |
1050 | operator<=>(const sub_match<_BiIter>& __lhs, |
1051 | const sub_match<_BiIter>& __rhs) |
1052 | noexcept(__detail::__is_contiguous_iter<_BiIter>::value) |
1053 | { |
1054 | using _Tr = char_traits<typename iterator_traits<_BiIter>::value_type>; |
1055 | return __detail::__char_traits_cmp_cat<_Tr>(__lhs.compare(__rhs)); |
1056 | } |
1057 | #else |
1058 | /** |
1059 | * @brief Tests the inequivalence of two regular expression submatches. |
1060 | * @param __lhs First regular expression submatch. |
1061 | * @param __rhs Second regular expression submatch. |
1062 | * @returns true if @a __lhs is not equivalent to @a __rhs, false otherwise. |
1063 | */ |
1064 | template<typename _BiIter> |
1065 | inline bool |
1066 | operator!=(const sub_match<_BiIter>& __lhs, const sub_match<_BiIter>& __rhs) |
1067 | { return __lhs.compare(__rhs) != 0; } |
1068 | |
1069 | /** |
1070 | * @brief Tests the ordering of two regular expression submatches. |
1071 | * @param __lhs First regular expression submatch. |
1072 | * @param __rhs Second regular expression submatch. |
1073 | * @returns true if @a __lhs precedes @a __rhs, false otherwise. |
1074 | */ |
1075 | template<typename _BiIter> |
1076 | inline bool |
1077 | operator<(const sub_match<_BiIter>& __lhs, const sub_match<_BiIter>& __rhs) |
1078 | { return __lhs.compare(__rhs) < 0; } |
1079 | |
1080 | /** |
1081 | * @brief Tests the ordering of two regular expression submatches. |
1082 | * @param __lhs First regular expression submatch. |
1083 | * @param __rhs Second regular expression submatch. |
1084 | * @returns true if @a __lhs does not succeed @a __rhs, false otherwise. |
1085 | */ |
1086 | template<typename _BiIter> |
1087 | inline bool |
1088 | operator<=(const sub_match<_BiIter>& __lhs, const sub_match<_BiIter>& __rhs) |
1089 | { return __lhs.compare(__rhs) <= 0; } |
1090 | |
1091 | /** |
1092 | * @brief Tests the ordering of two regular expression submatches. |
1093 | * @param __lhs First regular expression submatch. |
1094 | * @param __rhs Second regular expression submatch. |
1095 | * @returns true if @a __lhs does not precede @a __rhs, false otherwise. |
1096 | */ |
1097 | template<typename _BiIter> |
1098 | inline bool |
1099 | operator>=(const sub_match<_BiIter>& __lhs, const sub_match<_BiIter>& __rhs) |
1100 | { return __lhs.compare(__rhs) >= 0; } |
1101 | |
1102 | /** |
1103 | * @brief Tests the ordering of two regular expression submatches. |
1104 | * @param __lhs First regular expression submatch. |
1105 | * @param __rhs Second regular expression submatch. |
1106 | * @returns true if @a __lhs succeeds @a __rhs, false otherwise. |
1107 | */ |
1108 | template<typename _BiIter> |
1109 | inline bool |
1110 | operator>(const sub_match<_BiIter>& __lhs, const sub_match<_BiIter>& __rhs) |
1111 | { return __lhs.compare(__rhs) > 0; } |
1112 | #endif // three-way comparison |
1113 | |
1114 | /// @cond undocumented |
1115 | |
1116 | // Alias for a basic_string that can be compared to a sub_match. |
1117 | template<typename _Bi_iter, typename _Ch_traits, typename _Ch_alloc> |
1118 | using __sub_match_string = basic_string< |
1119 | typename iterator_traits<_Bi_iter>::value_type, |
1120 | _Ch_traits, _Ch_alloc>; |
1121 | /// @endcond |
1122 | |
1123 | #if ! __cpp_lib_three_way_comparison |
1124 | /** |
1125 | * @brief Tests the equivalence of a string and a regular expression |
1126 | * submatch. |
1127 | * @param __lhs A string. |
1128 | * @param __rhs A regular expression submatch. |
1129 | * @returns true if @a __lhs is equivalent to @a __rhs, false otherwise. |
1130 | */ |
1131 | template<typename _Bi_iter, typename _Ch_traits, typename _Ch_alloc> |
1132 | inline bool |
1133 | operator==(const __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>& __lhs, |
1134 | const sub_match<_Bi_iter>& __rhs) |
1135 | { return __rhs._M_compare(__lhs.data(), __lhs.size()) == 0; } |
1136 | |
1137 | /** |
1138 | * @brief Tests the inequivalence of a string and a regular expression |
1139 | * submatch. |
1140 | * @param __lhs A string. |
1141 | * @param __rhs A regular expression submatch. |
1142 | * @returns true if @a __lhs is not equivalent to @a __rhs, false otherwise. |
1143 | */ |
1144 | template<typename _Bi_iter, typename _Ch_traits, typename _Ch_alloc> |
1145 | inline bool |
1146 | operator!=(const __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>& __lhs, |
1147 | const sub_match<_Bi_iter>& __rhs) |
1148 | { return !(__lhs == __rhs); } |
1149 | |
1150 | /** |
1151 | * @brief Tests the ordering of a string and a regular expression submatch. |
1152 | * @param __lhs A string. |
1153 | * @param __rhs A regular expression submatch. |
1154 | * @returns true if @a __lhs precedes @a __rhs, false otherwise. |
1155 | */ |
1156 | template<typename _Bi_iter, typename _Ch_traits, typename _Ch_alloc> |
1157 | inline bool |
1158 | operator<(const __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>& __lhs, |
1159 | const sub_match<_Bi_iter>& __rhs) |
1160 | { return __rhs._M_compare(__lhs.data(), __lhs.size()) > 0; } |
1161 | |
1162 | /** |
1163 | * @brief Tests the ordering of a string and a regular expression submatch. |
1164 | * @param __lhs A string. |
1165 | * @param __rhs A regular expression submatch. |
1166 | * @returns true if @a __lhs succeeds @a __rhs, false otherwise. |
1167 | */ |
1168 | template<typename _Bi_iter, typename _Ch_traits, typename _Ch_alloc> |
1169 | inline bool |
1170 | operator>(const __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>& __lhs, |
1171 | const sub_match<_Bi_iter>& __rhs) |
1172 | { return __rhs < __lhs; } |
1173 | |
1174 | /** |
1175 | * @brief Tests the ordering of a string and a regular expression submatch. |
1176 | * @param __lhs A string. |
1177 | * @param __rhs A regular expression submatch. |
1178 | * @returns true if @a __lhs does not precede @a __rhs, false otherwise. |
1179 | */ |
1180 | template<typename _Bi_iter, typename _Ch_traits, typename _Ch_alloc> |
1181 | inline bool |
1182 | operator>=(const __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>& __lhs, |
1183 | const sub_match<_Bi_iter>& __rhs) |
1184 | { return !(__lhs < __rhs); } |
1185 | |
1186 | /** |
1187 | * @brief Tests the ordering of a string and a regular expression submatch. |
1188 | * @param __lhs A string. |
1189 | * @param __rhs A regular expression submatch. |
1190 | * @returns true if @a __lhs does not succeed @a __rhs, false otherwise. |
1191 | */ |
1192 | template<typename _Bi_iter, typename _Ch_traits, typename _Ch_alloc> |
1193 | inline bool |
1194 | operator<=(const __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>& __lhs, |
1195 | const sub_match<_Bi_iter>& __rhs) |
1196 | { return !(__rhs < __lhs); } |
1197 | #endif // three-way comparison |
1198 | |
1199 | /** |
1200 | * @brief Tests the equivalence of a regular expression submatch and a |
1201 | * string. |
1202 | * @param __lhs A regular expression submatch. |
1203 | * @param __rhs A string. |
1204 | * @returns true if @a __lhs is equivalent to @a __rhs, false otherwise. |
1205 | */ |
1206 | template<typename _Bi_iter, typename _Ch_traits, typename _Ch_alloc> |
1207 | inline bool |
1208 | operator==(const sub_match<_Bi_iter>& __lhs, |
1209 | const __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>& __rhs) |
1210 | { return __lhs._M_compare(__rhs.data(), __rhs.size()) == 0; } |
1211 | |
1212 | #if __cpp_lib_three_way_comparison |
1213 | /** |
1214 | * @brief Three-way comparison of a regular expression submatch and a string. |
1215 | * @param __lhs A regular expression submatch. |
1216 | * @param __rhs A string. |
1217 | * @returns A value indicating whether `__lhs` is less than, equal to, |
1218 | * greater than, or incomparable with `__rhs`. |
1219 | */ |
1220 | template<typename _Bi_iter, typename _Ch_traits, typename _Alloc> |
1221 | inline auto |
1222 | operator<=>(const sub_match<_Bi_iter>& __lhs, |
1223 | const __sub_match_string<_Bi_iter, _Ch_traits, _Alloc>& __rhs) |
1224 | noexcept(__detail::__is_contiguous_iter<_Bi_iter>::value) |
1225 | { |
1226 | return __detail::__char_traits_cmp_cat<_Ch_traits>( |
1227 | __lhs._M_compare(__rhs.data(), __rhs.size())); |
1228 | } |
1229 | #else |
1230 | /** |
1231 | * @brief Tests the inequivalence of a regular expression submatch and a |
1232 | * string. |
1233 | * @param __lhs A regular expression submatch. |
1234 | * @param __rhs A string. |
1235 | * @returns true if @a __lhs is not equivalent to @a __rhs, false otherwise. |
1236 | */ |
1237 | template<typename _Bi_iter, typename _Ch_traits, typename _Ch_alloc> |
1238 | inline bool |
1239 | operator!=(const sub_match<_Bi_iter>& __lhs, |
1240 | const __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>& __rhs) |
1241 | { return !(__lhs == __rhs); } |
1242 | |
1243 | /** |
1244 | * @brief Tests the ordering of a regular expression submatch and a string. |
1245 | * @param __lhs A regular expression submatch. |
1246 | * @param __rhs A string. |
1247 | * @returns true if @a __lhs precedes @a __rhs, false otherwise. |
1248 | */ |
1249 | template<typename _Bi_iter, typename _Ch_traits, typename _Ch_alloc> |
1250 | inline bool |
1251 | operator<(const sub_match<_Bi_iter>& __lhs, |
1252 | const __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>& __rhs) |
1253 | { return __lhs._M_compare(__rhs.data(), __rhs.size()) < 0; } |
1254 | |
1255 | /** |
1256 | * @brief Tests the ordering of a regular expression submatch and a string. |
1257 | * @param __lhs A regular expression submatch. |
1258 | * @param __rhs A string. |
1259 | * @returns true if @a __lhs succeeds @a __rhs, false otherwise. |
1260 | */ |
1261 | template<typename _Bi_iter, typename _Ch_traits, typename _Ch_alloc> |
1262 | inline bool |
1263 | operator>(const sub_match<_Bi_iter>& __lhs, |
1264 | const __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>& __rhs) |
1265 | { return __rhs < __lhs; } |
1266 | |
1267 | /** |
1268 | * @brief Tests the ordering of a regular expression submatch and a string. |
1269 | * @param __lhs A regular expression submatch. |
1270 | * @param __rhs A string. |
1271 | * @returns true if @a __lhs does not precede @a __rhs, false otherwise. |
1272 | */ |
1273 | template<typename _Bi_iter, typename _Ch_traits, typename _Ch_alloc> |
1274 | inline bool |
1275 | operator>=(const sub_match<_Bi_iter>& __lhs, |
1276 | const __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>& __rhs) |
1277 | { return !(__lhs < __rhs); } |
1278 | |
1279 | /** |
1280 | * @brief Tests the ordering of a regular expression submatch and a string. |
1281 | * @param __lhs A regular expression submatch. |
1282 | * @param __rhs A string. |
1283 | * @returns true if @a __lhs does not succeed @a __rhs, false otherwise. |
1284 | */ |
1285 | template<typename _Bi_iter, typename _Ch_traits, typename _Ch_alloc> |
1286 | inline bool |
1287 | operator<=(const sub_match<_Bi_iter>& __lhs, |
1288 | const __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>& __rhs) |
1289 | { return !(__rhs < __lhs); } |
1290 | |
1291 | /** |
1292 | * @brief Tests the equivalence of a C string and a regular expression |
1293 | * submatch. |
1294 | * @param __lhs A null-terminated string. |
1295 | * @param __rhs A regular expression submatch. |
1296 | * @returns true if @a __lhs is equivalent to @a __rhs, false otherwise. |
1297 | */ |
1298 | template<typename _Bi_iter> |
1299 | inline bool |
1300 | operator==(typename iterator_traits<_Bi_iter>::value_type const* __lhs, |
1301 | const sub_match<_Bi_iter>& __rhs) |
1302 | { return __rhs.compare(__lhs) == 0; } |
1303 | |
1304 | /** |
1305 | * @brief Tests the inequivalence of a C string and a regular |
1306 | * expression submatch. |
1307 | * @param __lhs A null-terminated string. |
1308 | * @param __rhs A regular expression submatch. |
1309 | * @returns true if @a __lhs is not equivalent to @a __rhs, false otherwise. |
1310 | */ |
1311 | template<typename _Bi_iter> |
1312 | inline bool |
1313 | operator!=(typename iterator_traits<_Bi_iter>::value_type const* __lhs, |
1314 | const sub_match<_Bi_iter>& __rhs) |
1315 | { return !(__lhs == __rhs); } |
1316 | |
1317 | /** |
1318 | * @brief Tests the ordering of a C string and a regular expression submatch. |
1319 | * @param __lhs A null-terminated string. |
1320 | * @param __rhs A regular expression submatch. |
1321 | * @returns true if @a __lhs precedes @a __rhs, false otherwise. |
1322 | */ |
1323 | template<typename _Bi_iter> |
1324 | inline bool |
1325 | operator<(typename iterator_traits<_Bi_iter>::value_type const* __lhs, |
1326 | const sub_match<_Bi_iter>& __rhs) |
1327 | { return __rhs.compare(__lhs) > 0; } |
1328 | |
1329 | /** |
1330 | * @brief Tests the ordering of a C string and a regular expression submatch. |
1331 | * @param __lhs A null-terminated string. |
1332 | * @param __rhs A regular expression submatch. |
1333 | * @returns true if @a __lhs succeeds @a __rhs, false otherwise. |
1334 | */ |
1335 | template<typename _Bi_iter> |
1336 | inline bool |
1337 | operator>(typename iterator_traits<_Bi_iter>::value_type const* __lhs, |
1338 | const sub_match<_Bi_iter>& __rhs) |
1339 | { return __rhs < __lhs; } |
1340 | |
1341 | /** |
1342 | * @brief Tests the ordering of a C string and a regular expression submatch. |
1343 | * @param __lhs A null-terminated string. |
1344 | * @param __rhs A regular expression submatch. |
1345 | * @returns true if @a __lhs does not precede @a __rhs, false otherwise. |
1346 | */ |
1347 | template<typename _Bi_iter> |
1348 | inline bool |
1349 | operator>=(typename iterator_traits<_Bi_iter>::value_type const* __lhs, |
1350 | const sub_match<_Bi_iter>& __rhs) |
1351 | { return !(__lhs < __rhs); } |
1352 | |
1353 | /** |
1354 | * @brief Tests the ordering of a C string and a regular expression submatch. |
1355 | * @param __lhs A null-terminated string. |
1356 | * @param __rhs A regular expression submatch. |
1357 | * @returns true if @a __lhs does not succeed @a __rhs, false otherwise. |
1358 | */ |
1359 | template<typename _Bi_iter> |
1360 | inline bool |
1361 | operator<=(typename iterator_traits<_Bi_iter>::value_type const* __lhs, |
1362 | const sub_match<_Bi_iter>& __rhs) |
1363 | { return !(__rhs < __lhs); } |
1364 | #endif // three-way comparison |
1365 | |
1366 | /** |
1367 | * @brief Tests the equivalence of a regular expression submatch and a C |
1368 | * string. |
1369 | * @param __lhs A regular expression submatch. |
1370 | * @param __rhs A null-terminated string. |
1371 | * @returns true if @a __lhs is equivalent to @a __rhs, false otherwise. |
1372 | */ |
1373 | template<typename _Bi_iter> |
1374 | inline bool |
1375 | operator==(const sub_match<_Bi_iter>& __lhs, |
1376 | typename iterator_traits<_Bi_iter>::value_type const* __rhs) |
1377 | { return __lhs.compare(__rhs) == 0; } |
1378 | |
1379 | #if __cpp_lib_three_way_comparison |
1380 | /** |
1381 | * @brief Three-way comparison of a regular expression submatch and a C |
1382 | * string. |
1383 | * @param __lhs A regular expression submatch. |
1384 | * @param __rhs A null-terminated string. |
1385 | * @returns A value indicating whether `__lhs` is less than, equal to, |
1386 | * greater than, or incomparable with `__rhs`. |
1387 | */ |
1388 | template<typename _Bi_iter> |
1389 | inline auto |
1390 | operator<=>(const sub_match<_Bi_iter>& __lhs, |
1391 | typename iterator_traits<_Bi_iter>::value_type const* __rhs) |
1392 | noexcept(__detail::__is_contiguous_iter<_Bi_iter>::value) |
1393 | { |
1394 | using _Tr = char_traits<typename iterator_traits<_Bi_iter>::value_type>; |
1395 | return __detail::__char_traits_cmp_cat<_Tr>(__lhs.compare(__rhs)); |
1396 | } |
1397 | #else |
1398 | /** |
1399 | * @brief Tests the inequivalence of a regular expression submatch and a |
1400 | * string. |
1401 | * @param __lhs A regular expression submatch. |
1402 | * @param __rhs A null-terminated string. |
1403 | * @returns true if @a __lhs is not equivalent to @a __rhs, false otherwise. |
1404 | */ |
1405 | template<typename _Bi_iter> |
1406 | inline bool |
1407 | operator!=(const sub_match<_Bi_iter>& __lhs, |
1408 | typename iterator_traits<_Bi_iter>::value_type const* __rhs) |
1409 | { return !(__lhs == __rhs); } |
1410 | |
1411 | /** |
1412 | * @brief Tests the ordering of a regular expression submatch and a C string. |
1413 | * @param __lhs A regular expression submatch. |
1414 | * @param __rhs A null-terminated string. |
1415 | * @returns true if @a __lhs precedes @a __rhs, false otherwise. |
1416 | */ |
1417 | template<typename _Bi_iter> |
1418 | inline bool |
1419 | operator<(const sub_match<_Bi_iter>& __lhs, |
1420 | typename iterator_traits<_Bi_iter>::value_type const* __rhs) |
1421 | { return __lhs.compare(__rhs) < 0; } |
1422 | |
1423 | /** |
1424 | * @brief Tests the ordering of a regular expression submatch and a C string. |
1425 | * @param __lhs A regular expression submatch. |
1426 | * @param __rhs A null-terminated string. |
1427 | * @returns true if @a __lhs succeeds @a __rhs, false otherwise. |
1428 | */ |
1429 | template<typename _Bi_iter> |
1430 | inline bool |
1431 | operator>(const sub_match<_Bi_iter>& __lhs, |
1432 | typename iterator_traits<_Bi_iter>::value_type const* __rhs) |
1433 | { return __rhs < __lhs; } |
1434 | |
1435 | /** |
1436 | * @brief Tests the ordering of a regular expression submatch and a C string. |
1437 | * @param __lhs A regular expression submatch. |
1438 | * @param __rhs A null-terminated string. |
1439 | * @returns true if @a __lhs does not precede @a __rhs, false otherwise. |
1440 | */ |
1441 | template<typename _Bi_iter> |
1442 | inline bool |
1443 | operator>=(const sub_match<_Bi_iter>& __lhs, |
1444 | typename iterator_traits<_Bi_iter>::value_type const* __rhs) |
1445 | { return !(__lhs < __rhs); } |
1446 | |
1447 | /** |
1448 | * @brief Tests the ordering of a regular expression submatch and a C string. |
1449 | * @param __lhs A regular expression submatch. |
1450 | * @param __rhs A null-terminated string. |
1451 | * @returns true if @a __lhs does not succeed @a __rhs, false otherwise. |
1452 | */ |
1453 | template<typename _Bi_iter> |
1454 | inline bool |
1455 | operator<=(const sub_match<_Bi_iter>& __lhs, |
1456 | typename iterator_traits<_Bi_iter>::value_type const* __rhs) |
1457 | { return !(__rhs < __lhs); } |
1458 | |
1459 | /** |
1460 | * @brief Tests the equivalence of a character and a regular expression |
1461 | * submatch. |
1462 | * @param __lhs A character. |
1463 | * @param __rhs A regular expression submatch. |
1464 | * @returns true if @a __lhs is equivalent to @a __rhs, false otherwise. |
1465 | */ |
1466 | template<typename _Bi_iter> |
1467 | inline bool |
1468 | operator==(typename iterator_traits<_Bi_iter>::value_type const& __lhs, |
1469 | const sub_match<_Bi_iter>& __rhs) |
1470 | { return __rhs._M_compare(std::__addressof(__lhs), 1) == 0; } |
1471 | |
1472 | /** |
1473 | * @brief Tests the inequivalence of a character and a regular expression |
1474 | * submatch. |
1475 | * @param __lhs A character. |
1476 | * @param __rhs A regular expression submatch. |
1477 | * @returns true if @a __lhs is not equivalent to @a __rhs, false otherwise. |
1478 | */ |
1479 | template<typename _Bi_iter> |
1480 | inline bool |
1481 | operator!=(typename iterator_traits<_Bi_iter>::value_type const& __lhs, |
1482 | const sub_match<_Bi_iter>& __rhs) |
1483 | { return !(__lhs == __rhs); } |
1484 | |
1485 | /** |
1486 | * @brief Tests the ordering of a character and a regular expression |
1487 | * submatch. |
1488 | * @param __lhs A character. |
1489 | * @param __rhs A regular expression submatch. |
1490 | * @returns true if @a __lhs precedes @a __rhs, false otherwise. |
1491 | */ |
1492 | template<typename _Bi_iter> |
1493 | inline bool |
1494 | operator<(typename iterator_traits<_Bi_iter>::value_type const& __lhs, |
1495 | const sub_match<_Bi_iter>& __rhs) |
1496 | { return __rhs._M_compare(std::__addressof(__lhs), 1) > 0; } |
1497 | |
1498 | /** |
1499 | * @brief Tests the ordering of a character and a regular expression |
1500 | * submatch. |
1501 | * @param __lhs A character. |
1502 | * @param __rhs A regular expression submatch. |
1503 | * @returns true if @a __lhs succeeds @a __rhs, false otherwise. |
1504 | */ |
1505 | template<typename _Bi_iter> |
1506 | inline bool |
1507 | operator>(typename iterator_traits<_Bi_iter>::value_type const& __lhs, |
1508 | const sub_match<_Bi_iter>& __rhs) |
1509 | { return __rhs < __lhs; } |
1510 | |
1511 | /** |
1512 | * @brief Tests the ordering of a character and a regular expression |
1513 | * submatch. |
1514 | * @param __lhs A character. |
1515 | * @param __rhs A regular expression submatch. |
1516 | * @returns true if @a __lhs does not precede @a __rhs, false otherwise. |
1517 | */ |
1518 | template<typename _Bi_iter> |
1519 | inline bool |
1520 | operator>=(typename iterator_traits<_Bi_iter>::value_type const& __lhs, |
1521 | const sub_match<_Bi_iter>& __rhs) |
1522 | { return !(__lhs < __rhs); } |
1523 | |
1524 | /** |
1525 | * @brief Tests the ordering of a character and a regular expression |
1526 | * submatch. |
1527 | * @param __lhs A character. |
1528 | * @param __rhs A regular expression submatch. |
1529 | * @returns true if @a __lhs does not succeed @a __rhs, false otherwise. |
1530 | */ |
1531 | template<typename _Bi_iter> |
1532 | inline bool |
1533 | operator<=(typename iterator_traits<_Bi_iter>::value_type const& __lhs, |
1534 | const sub_match<_Bi_iter>& __rhs) |
1535 | { return !(__rhs < __lhs); } |
1536 | #endif // three-way comparison |
1537 | |
1538 | /** |
1539 | * @brief Tests the equivalence of a regular expression submatch and a |
1540 | * character. |
1541 | * @param __lhs A regular expression submatch. |
1542 | * @param __rhs A character. |
1543 | * @returns true if @a __lhs is equivalent to @a __rhs, false otherwise. |
1544 | */ |
1545 | template<typename _Bi_iter> |
1546 | inline bool |
1547 | operator==(const sub_match<_Bi_iter>& __lhs, |
1548 | typename iterator_traits<_Bi_iter>::value_type const& __rhs) |
1549 | { return __lhs._M_compare(std::__addressof(__rhs), 1) == 0; } |
1550 | |
1551 | #if __cpp_lib_three_way_comparison |
1552 | /** |
1553 | * @brief Three-way comparison of a regular expression submatch and a |
1554 | * character. |
1555 | * @param __lhs A regular expression submatch. |
1556 | * @param __rhs A character. |
1557 | * @returns A value indicating whether `__lhs` is less than, equal to, |
1558 | * greater than, or incomparable with `__rhs`. |
1559 | */ |
1560 | |
1561 | template<typename _Bi_iter> |
1562 | inline auto |
1563 | operator<=>(const sub_match<_Bi_iter>& __lhs, |
1564 | typename iterator_traits<_Bi_iter>::value_type const& __rhs) |
1565 | noexcept(__detail::__is_contiguous_iter<_Bi_iter>::value) |
1566 | { |
1567 | using _Tr = char_traits<typename iterator_traits<_Bi_iter>::value_type>; |
1568 | return __detail::__char_traits_cmp_cat<_Tr>( |
1569 | __lhs._M_compare(std::__addressof(__rhs), 1)); |
1570 | } |
1571 | #else |
1572 | /** |
1573 | * @brief Tests the inequivalence of a regular expression submatch and a |
1574 | * character. |
1575 | * @param __lhs A regular expression submatch. |
1576 | * @param __rhs A character. |
1577 | * @returns true if @a __lhs is not equivalent to @a __rhs, false otherwise. |
1578 | */ |
1579 | template<typename _Bi_iter> |
1580 | inline bool |
1581 | operator!=(const sub_match<_Bi_iter>& __lhs, |
1582 | typename iterator_traits<_Bi_iter>::value_type const& __rhs) |
1583 | { return !(__lhs == __rhs); } |
1584 | |
1585 | /** |
1586 | * @brief Tests the ordering of a regular expression submatch and a |
1587 | * character. |
1588 | * @param __lhs A regular expression submatch. |
1589 | * @param __rhs A character. |
1590 | * @returns true if @a __lhs precedes @a __rhs, false otherwise. |
1591 | */ |
1592 | template<typename _Bi_iter> |
1593 | inline bool |
1594 | operator<(const sub_match<_Bi_iter>& __lhs, |
1595 | typename iterator_traits<_Bi_iter>::value_type const& __rhs) |
1596 | { return __lhs._M_compare(std::__addressof(__rhs), 1) < 0; } |
1597 | |
1598 | /** |
1599 | * @brief Tests the ordering of a regular expression submatch and a |
1600 | * character. |
1601 | * @param __lhs A regular expression submatch. |
1602 | * @param __rhs A character. |
1603 | * @returns true if @a __lhs succeeds @a __rhs, false otherwise. |
1604 | */ |
1605 | template<typename _Bi_iter> |
1606 | inline bool |
1607 | operator>(const sub_match<_Bi_iter>& __lhs, |
1608 | typename iterator_traits<_Bi_iter>::value_type const& __rhs) |
1609 | { return __rhs < __lhs; } |
1610 | |
1611 | /** |
1612 | * @brief Tests the ordering of a regular expression submatch and a |
1613 | * character. |
1614 | * @param __lhs A regular expression submatch. |
1615 | * @param __rhs A character. |
1616 | * @returns true if @a __lhs does not precede @a __rhs, false otherwise. |
1617 | */ |
1618 | template<typename _Bi_iter> |
1619 | inline bool |
1620 | operator>=(const sub_match<_Bi_iter>& __lhs, |
1621 | typename iterator_traits<_Bi_iter>::value_type const& __rhs) |
1622 | { return !(__lhs < __rhs); } |
1623 | |
1624 | /** |
1625 | * @brief Tests the ordering of a regular expression submatch and a |
1626 | * character. |
1627 | * @param __lhs A regular expression submatch. |
1628 | * @param __rhs A character. |
1629 | * @returns true if @a __lhs does not succeed @a __rhs, false otherwise. |
1630 | */ |
1631 | template<typename _Bi_iter> |
1632 | inline bool |
1633 | operator<=(const sub_match<_Bi_iter>& __lhs, |
1634 | typename iterator_traits<_Bi_iter>::value_type const& __rhs) |
1635 | { return !(__rhs < __lhs); } |
1636 | #endif // three-way comparison |
1637 | |
1638 | /** |
1639 | * @brief Inserts a matched string into an output stream. |
1640 | * |
1641 | * @param __os The output stream. |
1642 | * @param __m A submatch string. |
1643 | * |
1644 | * @returns the output stream with the submatch string inserted. |
1645 | */ |
1646 | template<typename _Ch_type, typename _Ch_traits, typename _Bi_iter> |
1647 | inline |
1648 | basic_ostream<_Ch_type, _Ch_traits>& |
1649 | operator<<(basic_ostream<_Ch_type, _Ch_traits>& __os, |
1650 | const sub_match<_Bi_iter>& __m) |
1651 | { return __os << __m.str(); } |
1652 | |
1653 | /// @} relates sub_match |
1654 | |
1655 | // [7.10] Class template match_results |
1656 | |
1657 | /** |
1658 | * @brief The results of a match or search operation. |
1659 | * |
1660 | * A collection of character sequences representing the result of a regular |
1661 | * expression match. Storage for the collection is allocated and freed as |
1662 | * necessary by the member functions of class template match_results. |
1663 | * |
1664 | * This class satisfies the Sequence requirements, with the exception that |
1665 | * only the operations defined for a const-qualified Sequence are supported. |
1666 | * |
1667 | * The sub_match object stored at index 0 represents sub-expression 0, i.e. |
1668 | * the whole match. In this case the %sub_match member matched is always true. |
1669 | * The sub_match object stored at index n denotes what matched the marked |
1670 | * sub-expression n within the matched expression. If the sub-expression n |
1671 | * participated in a regular expression match then the %sub_match member |
1672 | * matched evaluates to true, and members first and second denote the range |
1673 | * of characters [first, second) which formed that match. Otherwise matched |
1674 | * is false, and members first and second point to the end of the sequence |
1675 | * that was searched. |
1676 | */ |
1677 | template<typename _Bi_iter, |
1678 | typename _Alloc = allocator<sub_match<_Bi_iter> > > |
1679 | class match_results |
1680 | : private std::vector<sub_match<_Bi_iter>, _Alloc> |
1681 | { |
1682 | private: |
1683 | /* |
1684 | * The vector base is empty if this does not represent a match (!ready()); |
1685 | * Otherwise if it's a match failure, it contains 3 elements: |
1686 | * [0] unmatched |
1687 | * [1] prefix |
1688 | * [2] suffix |
1689 | * Otherwise it contains n+4 elements where n is the number of marked |
1690 | * sub-expressions: |
1691 | * [0] entire match |
1692 | * [1] 1st marked subexpression |
1693 | * ... |
1694 | * [n] nth marked subexpression |
1695 | * [n+1] unmatched |
1696 | * [n+2] prefix |
1697 | * [n+3] suffix |
1698 | */ |
1699 | typedef std::vector<sub_match<_Bi_iter>, _Alloc> _Base_type; |
1700 | typedef std::iterator_traits<_Bi_iter> __iter_traits; |
1701 | typedef regex_constants::match_flag_type match_flag_type; |
1702 | |
1703 | public: |
1704 | /** |
1705 | * @name 28.10 Public Types |
1706 | */ |
1707 | ///@{ |
1708 | typedef sub_match<_Bi_iter> value_type; |
1709 | typedef const value_type& const_reference; |
1710 | typedef value_type& reference; |
1711 | typedef typename _Base_type::const_iterator const_iterator; |
1712 | typedef const_iterator iterator; |
1713 | typedef typename __iter_traits::difference_type difference_type; |
1714 | typedef typename allocator_traits<_Alloc>::size_type size_type; |
1715 | typedef _Alloc allocator_type; |
1716 | typedef typename __iter_traits::value_type char_type; |
1717 | typedef std::basic_string<char_type> string_type; |
1718 | ///@} |
1719 | |
1720 | public: |
1721 | /** |
1722 | * @name 28.10.1 Construction, Copying, and Destruction |
1723 | */ |
1724 | ///@{ |
1725 | |
1726 | /** |
1727 | * @brief Constructs a default %match_results container. |
1728 | * @post size() returns 0 and str() returns an empty string. |
1729 | */ |
1730 | match_results() : match_results(_Alloc()) { } |
1731 | |
1732 | /** |
1733 | * @brief Constructs a default %match_results container. |
1734 | * @post size() returns 0 and str() returns an empty string. |
1735 | */ |
1736 | explicit |
1737 | match_results(const _Alloc& __a) noexcept |
1738 | : _Base_type(__a) |
1739 | { } |
1740 | |
1741 | /** |
1742 | * @brief Copy constructs a %match_results. |
1743 | */ |
1744 | match_results(const match_results&) = default; |
1745 | |
1746 | /** |
1747 | * @brief Move constructs a %match_results. |
1748 | */ |
1749 | match_results(match_results&&) noexcept = default; |
1750 | |
1751 | /** |
1752 | * @brief Assigns rhs to *this. |
1753 | */ |
1754 | match_results& |
1755 | operator=(const match_results&) = default; |
1756 | |
1757 | /** |
1758 | * @brief Move-assigns rhs to *this. |
1759 | */ |
1760 | match_results& |
1761 | operator=(match_results&&) = default; |
1762 | |
1763 | /** |
1764 | * @brief Destroys a %match_results object. |
1765 | */ |
1766 | ~match_results() = default; |
1767 | |
1768 | ///@} |
1769 | |
1770 | // 28.10.2, state: |
1771 | /** |
1772 | * @brief Indicates if the %match_results is ready. |
1773 | * @retval true The object has a fully-established result state. |
1774 | * @retval false The object is not ready. |
1775 | */ |
1776 | bool ready() const noexcept { return !_Base_type::empty(); } |
1777 | |
1778 | /** |
1779 | * @name 28.10.2 Size |
1780 | */ |
1781 | ///@{ |
1782 | |
1783 | /** |
1784 | * @brief Gets the number of matches and submatches. |
1785 | * |
1786 | * The number of matches for a given regular expression will be either 0 |
1787 | * if there was no match or mark_count() + 1 if a match was successful. |
1788 | * Some matches may be empty. |
1789 | * |
1790 | * @returns the number of matches found. |
1791 | */ |
1792 | size_type |
1793 | size() const noexcept |
1794 | { return _Base_type::empty() ? 0 : _Base_type::size() - 3; } |
1795 | |
1796 | size_type |
1797 | max_size() const noexcept |
1798 | { return _Base_type::max_size() - 3; } |
1799 | |
1800 | /** |
1801 | * @brief Indicates if the %match_results contains no results. |
1802 | * @retval true The %match_results object is empty. |
1803 | * @retval false The %match_results object is not empty. |
1804 | */ |
1805 | _GLIBCXX_NODISCARD bool |
1806 | empty() const noexcept |
1807 | { return _Base_type::size() <= 3; } |
1808 | |
1809 | ///@} |
1810 | |
1811 | /** |
1812 | * @name 28.10.4 Element Access |
1813 | */ |
1814 | ///@{ |
1815 | |
1816 | /** |
1817 | * @brief Gets the length of the indicated submatch. |
1818 | * @param __sub indicates the submatch. |
1819 | * @pre ready() == true |
1820 | * |
1821 | * This function returns the length of the indicated submatch, or the |
1822 | * length of the entire match if @p __sub is zero (the default). |
1823 | */ |
1824 | difference_type |
1825 | length(size_type __sub = 0) const |
1826 | { return (*this)[__sub].length(); } |
1827 | |
1828 | /** |
1829 | * @brief Gets the offset of the beginning of the indicated submatch. |
1830 | * @param __sub indicates the submatch. |
1831 | * @pre ready() == true |
1832 | * |
1833 | * This function returns the offset from the beginning of the target |
1834 | * sequence to the beginning of the submatch, unless the value of @p __sub |
1835 | * is zero (the default), in which case this function returns the offset |
1836 | * from the beginning of the target sequence to the beginning of the |
1837 | * match. |
1838 | */ |
1839 | difference_type |
1840 | position(size_type __sub = 0) const |
1841 | { return std::distance(_M_begin, (*this)[__sub].first); } |
1842 | |
1843 | /** |
1844 | * @brief Gets the match or submatch converted to a string type. |
1845 | * @param __sub indicates the submatch. |
1846 | * @pre ready() == true |
1847 | * |
1848 | * This function gets the submatch (or match, if @p __sub is |
1849 | * zero) extracted from the target range and converted to the |
1850 | * associated string type. |
1851 | */ |
1852 | string_type |
1853 | str(size_type __sub = 0) const |
1854 | { return string_type((*this)[__sub]); } |
1855 | |
1856 | /** |
1857 | * @brief Gets a %sub_match reference for the match or submatch. |
1858 | * @param __sub indicates the submatch. |
1859 | * @pre ready() == true |
1860 | * |
1861 | * This function gets a reference to the indicated submatch, or |
1862 | * the entire match if @p __sub is zero. |
1863 | * |
1864 | * If @p __sub >= size() then this function returns a %sub_match with a |
1865 | * special value indicating no submatch. |
1866 | */ |
1867 | const_reference |
1868 | operator[](size_type __sub) const |
1869 | { |
1870 | __glibcxx_assert( ready() ); |
1871 | return __sub < size() |
1872 | ? _Base_type::operator[](__sub) |
1873 | : _M_unmatched_sub(); |
1874 | } |
1875 | |
1876 | /** |
1877 | * @brief Gets a %sub_match representing the match prefix. |
1878 | * @pre ready() == true |
1879 | * |
1880 | * This function gets a reference to a %sub_match object representing the |
1881 | * part of the target range between the start of the target range and the |
1882 | * start of the match. |
1883 | */ |
1884 | const_reference |
1885 | prefix() const |
1886 | { |
1887 | __glibcxx_assert( ready() ); |
1888 | return !empty() ? _M_prefix() : _M_unmatched_sub(); |
1889 | } |
1890 | |
1891 | /** |
1892 | * @brief Gets a %sub_match representing the match suffix. |
1893 | * @pre ready() == true |
1894 | * |
1895 | * This function gets a reference to a %sub_match object representing the |
1896 | * part of the target range between the end of the match and the end of |
1897 | * the target range. |
1898 | */ |
1899 | const_reference |
1900 | suffix() const |
1901 | { |
1902 | __glibcxx_assert( ready() ); |
1903 | return !empty() ? _M_suffix() : _M_unmatched_sub(); |
1904 | } |
1905 | |
1906 | /** |
1907 | * @brief Gets an iterator to the start of the %sub_match collection. |
1908 | */ |
1909 | const_iterator |
1910 | begin() const noexcept |
1911 | { return _Base_type::begin(); } |
1912 | |
1913 | /** |
1914 | * @brief Gets an iterator to the start of the %sub_match collection. |
1915 | */ |
1916 | const_iterator |
1917 | cbegin() const noexcept |
1918 | { return this->begin(); } |
1919 | |
1920 | /** |
1921 | * @brief Gets an iterator to one-past-the-end of the collection. |
1922 | */ |
1923 | const_iterator |
1924 | end() const noexcept |
1925 | { return _Base_type::end() - (_Base_type::empty() ? 0 : 3); } |
1926 | |
1927 | /** |
1928 | * @brief Gets an iterator to one-past-the-end of the collection. |
1929 | */ |
1930 | const_iterator |
1931 | cend() const noexcept |
1932 | { return this->end(); } |
1933 | |
1934 | ///@} |
1935 | |
1936 | /** |
1937 | * @name 28.10.5 Formatting |
1938 | * |
1939 | * These functions perform formatted substitution of the matched |
1940 | * character sequences into their target. The format specifiers and |
1941 | * escape sequences accepted by these functions are determined by |
1942 | * their @p flags parameter as documented above. |
1943 | */ |
1944 | ///@{ |
1945 | |
1946 | /** |
1947 | * @pre ready() == true |
1948 | */ |
1949 | template<typename _Out_iter> |
1950 | _Out_iter |
1951 | format(_Out_iter __out, const char_type* __fmt_first, |
1952 | const char_type* __fmt_last, |
1953 | match_flag_type __flags = regex_constants::format_default) const; |
1954 | |
1955 | /** |
1956 | * @pre ready() == true |
1957 | */ |
1958 | template<typename _Out_iter, typename _St, typename _Sa> |
1959 | _Out_iter |
1960 | format(_Out_iter __out, const basic_string<char_type, _St, _Sa>& __fmt, |
1961 | match_flag_type __flags = regex_constants::format_default) const |
1962 | { |
1963 | return format(__out, __fmt.data(), __fmt.data() + __fmt.size(), |
1964 | __flags); |
1965 | } |
1966 | |
1967 | /** |
1968 | * @pre ready() == true |
1969 | */ |
1970 | template<typename _St, typename _Sa> |
1971 | basic_string<char_type, _St, _Sa> |
1972 | format(const basic_string<char_type, _St, _Sa>& __fmt, |
1973 | match_flag_type __flags = regex_constants::format_default) const |
1974 | { |
1975 | basic_string<char_type, _St, _Sa> __result; |
1976 | format(std::back_inserter(__result), __fmt, __flags); |
1977 | return __result; |
1978 | } |
1979 | |
1980 | /** |
1981 | * @pre ready() == true |
1982 | */ |
1983 | string_type |
1984 | format(const char_type* __fmt, |
1985 | match_flag_type __flags = regex_constants::format_default) const |
1986 | { |
1987 | string_type __result; |
1988 | format(std::back_inserter(__result), |
1989 | __fmt, |
1990 | __fmt + char_traits<char_type>::length(__fmt), |
1991 | __flags); |
1992 | return __result; |
1993 | } |
1994 | |
1995 | ///@} |
1996 | |
1997 | /** |
1998 | * @name 28.10.6 Allocator |
1999 | */ |
2000 | ///@{ |
2001 | |
2002 | /** |
2003 | * @brief Gets a copy of the allocator. |
2004 | */ |
2005 | allocator_type |
2006 | get_allocator() const noexcept |
2007 | { return _Base_type::get_allocator(); } |
2008 | |
2009 | ///@} |
2010 | |
2011 | /** |
2012 | * @name 28.10.7 Swap |
2013 | */ |
2014 | ///@{ |
2015 | |
2016 | /** |
2017 | * @brief Swaps the contents of two match_results. |
2018 | */ |
2019 | void |
2020 | swap(match_results& __that) noexcept |
2021 | { |
2022 | using std::swap; |
2023 | _Base_type::swap(__that); |
2024 | swap(_M_begin, __that._M_begin); |
2025 | } |
2026 | ///@} |
2027 | |
2028 | private: |
2029 | template<typename, typename, typename> |
2030 | friend class regex_iterator; |
2031 | |
2032 | /// @cond undocumented |
2033 | |
2034 | template<typename, typename, typename, bool> |
2035 | friend class __detail::_Executor; |
2036 | |
2037 | template<typename _Bp, typename _Ap, typename _Cp, typename _Rp, |
2038 | __detail::_RegexExecutorPolicy, bool> |
2039 | friend bool |
2040 | __detail::__regex_algo_impl(_Bp, _Bp, match_results<_Bp, _Ap>&, |
2041 | const basic_regex<_Cp, _Rp>&, |
2042 | regex_constants::match_flag_type); |
2043 | |
2044 | // Reset contents to __size unmatched sub_match objects |
2045 | // (plus additional objects for prefix, suffix and unmatched sub). |
2046 | void |
2047 | _M_resize(unsigned int __size) |
2048 | { _Base_type::assign(__size + 3, sub_match<_Bi_iter>{}); } |
2049 | |
2050 | // Set state to a failed match for the given past-the-end iterator. |
2051 | void |
2052 | _M_establish_failed_match(_Bi_iter __end) |
2053 | { |
2054 | sub_match<_Bi_iter> __sm; |
2055 | __sm.first = __sm.second = __end; |
2056 | _Base_type::assign(3, __sm); |
2057 | } |
2058 | |
2059 | const_reference |
2060 | _M_unmatched_sub() const |
2061 | { return _Base_type::operator[](_Base_type::size() - 3); } |
2062 | |
2063 | sub_match<_Bi_iter>& |
2064 | _M_unmatched_sub() |
2065 | { return _Base_type::operator[](_Base_type::size() - 3); } |
2066 | |
2067 | const_reference |
2068 | _M_prefix() const |
2069 | { return _Base_type::operator[](_Base_type::size() - 2); } |
2070 | |
2071 | sub_match<_Bi_iter>& |
2072 | _M_prefix() |
2073 | { return _Base_type::operator[](_Base_type::size() - 2); } |
2074 | |
2075 | const_reference |
2076 | _M_suffix() const |
2077 | { return _Base_type::operator[](_Base_type::size() - 1); } |
2078 | |
2079 | sub_match<_Bi_iter>& |
2080 | _M_suffix() |
2081 | { return _Base_type::operator[](_Base_type::size() - 1); } |
2082 | |
2083 | _Bi_iter _M_begin; |
2084 | /// @endcond |
2085 | }; |
2086 | |
2087 | typedef match_results<const char*> cmatch; |
2088 | typedef match_results<string::const_iterator> smatch; |
2089 | #ifdef _GLIBCXX_USE_WCHAR_T |
2090 | typedef match_results<const wchar_t*> wcmatch; |
2091 | typedef match_results<wstring::const_iterator> wsmatch; |
2092 | #endif |
2093 | |
2094 | // match_results comparisons |
2095 | |
2096 | /** |
2097 | * @brief Compares two match_results for equality. |
2098 | * @returns true if the two objects refer to the same match, |
2099 | * false otherwise. |
2100 | */ |
2101 | template<typename _Bi_iter, typename _Alloc> |
2102 | inline bool |
2103 | operator==(const match_results<_Bi_iter, _Alloc>& __m1, |
2104 | const match_results<_Bi_iter, _Alloc>& __m2) |
2105 | { |
2106 | if (__m1.ready() != __m2.ready()) |
2107 | return false; |
2108 | if (!__m1.ready()) // both are not ready |
2109 | return true; |
2110 | if (__m1.empty() != __m2.empty()) |
2111 | return false; |
2112 | if (__m1.empty()) // both are empty |
2113 | return true; |
2114 | return __m1.prefix() == __m2.prefix() |
2115 | && __m1.size() == __m2.size() |
2116 | && std::equal(__m1.begin(), __m1.end(), __m2.begin()) |
2117 | && __m1.suffix() == __m2.suffix(); |
2118 | } |
2119 | |
2120 | #if ! __cpp_lib_three_way_comparison |
2121 | /** |
2122 | * @brief Compares two match_results for inequality. |
2123 | * @returns true if the two objects do not refer to the same match, |
2124 | * false otherwise. |
2125 | */ |
2126 | template<typename _Bi_iter, class _Alloc> |
2127 | inline bool |
2128 | operator!=(const match_results<_Bi_iter, _Alloc>& __m1, |
2129 | const match_results<_Bi_iter, _Alloc>& __m2) |
2130 | { return !(__m1 == __m2); } |
2131 | #endif |
2132 | |
2133 | // [7.10.6] match_results swap |
2134 | /** |
2135 | * @brief Swaps two match results. |
2136 | * @param __lhs A match result. |
2137 | * @param __rhs A match result. |
2138 | * |
2139 | * The contents of the two match_results objects are swapped. |
2140 | */ |
2141 | template<typename _Bi_iter, typename _Alloc> |
2142 | inline void |
2143 | swap(match_results<_Bi_iter, _Alloc>& __lhs, |
2144 | match_results<_Bi_iter, _Alloc>& __rhs) noexcept |
2145 | { __lhs.swap(__rhs); } |
2146 | |
2147 | _GLIBCXX_END_NAMESPACE_CXX11 |
2148 | |
2149 | // [28.11.2] Function template regex_match |
2150 | /** |
2151 | * @name Matching, Searching, and Replacing |
2152 | */ |
2153 | ///@{ |
2154 | |
2155 | /** |
2156 | * @brief Determines if there is a match between the regular expression @p e |
2157 | * and all of the character sequence [first, last). |
2158 | * |
2159 | * @param __s Start of the character sequence to match. |
2160 | * @param __e One-past-the-end of the character sequence to match. |
2161 | * @param __m The match results. |
2162 | * @param __re The regular expression. |
2163 | * @param __flags Controls how the regular expression is matched. |
2164 | * |
2165 | * @retval true A match exists. |
2166 | * @retval false Otherwise. |
2167 | * |
2168 | * @throws an exception of type regex_error. |
2169 | */ |
2170 | template<typename _Bi_iter, typename _Alloc, |
2171 | typename _Ch_type, typename _Rx_traits> |
2172 | inline bool |
2173 | regex_match(_Bi_iter __s, |
2174 | _Bi_iter __e, |
2175 | match_results<_Bi_iter, _Alloc>& __m, |
2176 | const basic_regex<_Ch_type, _Rx_traits>& __re, |
2177 | regex_constants::match_flag_type __flags |
2178 | = regex_constants::match_default) |
2179 | { |
2180 | return __detail::__regex_algo_impl<_Bi_iter, _Alloc, _Ch_type, _Rx_traits, |
2181 | __detail::_RegexExecutorPolicy::_S_auto, true> |
2182 | (__s, __e, __m, __re, __flags); |
2183 | } |
2184 | |
2185 | /** |
2186 | * @brief Indicates if there is a match between the regular expression @p e |
2187 | * and all of the character sequence [first, last). |
2188 | * |
2189 | * @param __first Beginning of the character sequence to match. |
2190 | * @param __last One-past-the-end of the character sequence to match. |
2191 | * @param __re The regular expression. |
2192 | * @param __flags Controls how the regular expression is matched. |
2193 | * |
2194 | * @retval true A match exists. |
2195 | * @retval false Otherwise. |
2196 | * |
2197 | * @throws an exception of type regex_error. |
2198 | */ |
2199 | template<typename _Bi_iter, typename _Ch_type, typename _Rx_traits> |
2200 | inline bool |
2201 | regex_match(_Bi_iter __first, _Bi_iter __last, |
2202 | const basic_regex<_Ch_type, _Rx_traits>& __re, |
2203 | regex_constants::match_flag_type __flags |
2204 | = regex_constants::match_default) |
2205 | { |
2206 | match_results<_Bi_iter> __what; |
2207 | return regex_match(__first, __last, __what, __re, __flags); |
2208 | } |
2209 | |
2210 | /** |
2211 | * @brief Determines if there is a match between the regular expression @p e |
2212 | * and a C-style null-terminated string. |
2213 | * |
2214 | * @param __s The C-style null-terminated string to match. |
2215 | * @param __m The match results. |
2216 | * @param __re The regular expression. |
2217 | * @param __f Controls how the regular expression is matched. |
2218 | * |
2219 | * @retval true A match exists. |
2220 | * @retval false Otherwise. |
2221 | * |
2222 | * @throws an exception of type regex_error. |
2223 | */ |
2224 | template<typename _Ch_type, typename _Alloc, typename _Rx_traits> |
2225 | inline bool |
2226 | regex_match(const _Ch_type* __s, |
2227 | match_results<const _Ch_type*, _Alloc>& __m, |
2228 | const basic_regex<_Ch_type, _Rx_traits>& __re, |
2229 | regex_constants::match_flag_type __f |
2230 | = regex_constants::match_default) |
2231 | { return regex_match(__s, __s + _Rx_traits::length(__s), __m, __re, __f); } |
2232 | |
2233 | /** |
2234 | * @brief Determines if there is a match between the regular expression @p e |
2235 | * and a string. |
2236 | * |
2237 | * @param __s The string to match. |
2238 | * @param __m The match results. |
2239 | * @param __re The regular expression. |
2240 | * @param __flags Controls how the regular expression is matched. |
2241 | * |
2242 | * @retval true A match exists. |
2243 | * @retval false Otherwise. |
2244 | * |
2245 | * @throws an exception of type regex_error. |
2246 | */ |
2247 | template<typename _Ch_traits, typename _Ch_alloc, |
2248 | typename _Alloc, typename _Ch_type, typename _Rx_traits> |
2249 | inline bool |
2250 | regex_match(const basic_string<_Ch_type, _Ch_traits, _Ch_alloc>& __s, |
2251 | match_results<typename basic_string<_Ch_type, |
2252 | _Ch_traits, _Ch_alloc>::const_iterator, _Alloc>& __m, |
2253 | const basic_regex<_Ch_type, _Rx_traits>& __re, |
2254 | regex_constants::match_flag_type __flags |
2255 | = regex_constants::match_default) |
2256 | { return regex_match(__s.begin(), __s.end(), __m, __re, __flags); } |
2257 | |
2258 | // _GLIBCXX_RESOLVE_LIB_DEFECTS |
2259 | // 2329. regex_match() with match_results should forbid temporary strings |
2260 | /// Prevent unsafe attempts to get match_results from a temporary string. |
2261 | template<typename _Ch_traits, typename _Ch_alloc, |
2262 | typename _Alloc, typename _Ch_type, typename _Rx_traits> |
2263 | bool |
2264 | regex_match(const basic_string<_Ch_type, _Ch_traits, _Ch_alloc>&&, |
2265 | match_results<typename basic_string<_Ch_type, |
2266 | _Ch_traits, _Ch_alloc>::const_iterator, _Alloc>&, |
2267 | const basic_regex<_Ch_type, _Rx_traits>&, |
2268 | regex_constants::match_flag_type |
2269 | = regex_constants::match_default) = delete; |
2270 | |
2271 | /** |
2272 | * @brief Indicates if there is a match between the regular expression @p e |
2273 | * and a C-style null-terminated string. |
2274 | * |
2275 | * @param __s The C-style null-terminated string to match. |
2276 | * @param __re The regular expression. |
2277 | * @param __f Controls how the regular expression is matched. |
2278 | * |
2279 | * @retval true A match exists. |
2280 | * @retval false Otherwise. |
2281 | * |
2282 | * @throws an exception of type regex_error. |
2283 | */ |
2284 | template<typename _Ch_type, class _Rx_traits> |
2285 | inline bool |
2286 | regex_match(const _Ch_type* __s, |
2287 | const basic_regex<_Ch_type, _Rx_traits>& __re, |
2288 | regex_constants::match_flag_type __f |
2289 | = regex_constants::match_default) |
2290 | { return regex_match(__s, __s + _Rx_traits::length(__s), __re, __f); } |
2291 | |
2292 | /** |
2293 | * @brief Indicates if there is a match between the regular expression @p e |
2294 | * and a string. |
2295 | * |
2296 | * @param __s [IN] The string to match. |
2297 | * @param __re [IN] The regular expression. |
2298 | * @param __flags [IN] Controls how the regular expression is matched. |
2299 | * |
2300 | * @retval true A match exists. |
2301 | * @retval false Otherwise. |
2302 | * |
2303 | * @throws an exception of type regex_error. |
2304 | */ |
2305 | template<typename _Ch_traits, typename _Str_allocator, |
2306 | typename _Ch_type, typename _Rx_traits> |
2307 | inline bool |
2308 | regex_match(const basic_string<_Ch_type, _Ch_traits, _Str_allocator>& __s, |
2309 | const basic_regex<_Ch_type, _Rx_traits>& __re, |
2310 | regex_constants::match_flag_type __flags |
2311 | = regex_constants::match_default) |
2312 | { return regex_match(__s.begin(), __s.end(), __re, __flags); } |
2313 | |
2314 | // [7.11.3] Function template regex_search |
2315 | /** |
2316 | * Searches for a regular expression within a range. |
2317 | * @param __s [IN] The start of the string to search. |
2318 | * @param __e [IN] One-past-the-end of the string to search. |
2319 | * @param __m [OUT] The match results. |
2320 | * @param __re [IN] The regular expression to search for. |
2321 | * @param __flags [IN] Search policy flags. |
2322 | * @retval true A match was found within the string. |
2323 | * @retval false No match was found within the string, the content of %m is |
2324 | * undefined. |
2325 | * |
2326 | * @throws an exception of type regex_error. |
2327 | */ |
2328 | template<typename _Bi_iter, typename _Alloc, |
2329 | typename _Ch_type, typename _Rx_traits> |
2330 | inline bool |
2331 | regex_search(_Bi_iter __s, _Bi_iter __e, |
2332 | match_results<_Bi_iter, _Alloc>& __m, |
2333 | const basic_regex<_Ch_type, _Rx_traits>& __re, |
2334 | regex_constants::match_flag_type __flags |
2335 | = regex_constants::match_default) |
2336 | { |
2337 | return __detail::__regex_algo_impl<_Bi_iter, _Alloc, _Ch_type, _Rx_traits, |
2338 | __detail::_RegexExecutorPolicy::_S_auto, false> |
2339 | (__s, __e, __m, __re, __flags); |
2340 | } |
2341 | |
2342 | /** |
2343 | * Searches for a regular expression within a range. |
2344 | * @param __first [IN] The start of the string to search. |
2345 | * @param __last [IN] One-past-the-end of the string to search. |
2346 | * @param __re [IN] The regular expression to search for. |
2347 | * @param __flags [IN] Search policy flags. |
2348 | * @retval true A match was found within the string. |
2349 | * @retval false No match was found within the string. |
2350 | * |
2351 | * @throws an exception of type regex_error. |
2352 | */ |
2353 | template<typename _Bi_iter, typename _Ch_type, typename _Rx_traits> |
2354 | inline bool |
2355 | regex_search(_Bi_iter __first, _Bi_iter __last, |
2356 | const basic_regex<_Ch_type, _Rx_traits>& __re, |
2357 | regex_constants::match_flag_type __flags |
2358 | = regex_constants::match_default) |
2359 | { |
2360 | match_results<_Bi_iter> __what; |
2361 | return regex_search(__first, __last, __what, __re, __flags); |
2362 | } |
2363 | |
2364 | /** |
2365 | * @brief Searches for a regular expression within a C-string. |
2366 | * @param __s [IN] A C-string to search for the regex. |
2367 | * @param __m [OUT] The set of regex matches. |
2368 | * @param __e [IN] The regex to search for in @p s. |
2369 | * @param __f [IN] The search flags. |
2370 | * @retval true A match was found within the string. |
2371 | * @retval false No match was found within the string, the content of %m is |
2372 | * undefined. |
2373 | * |
2374 | * @throws an exception of type regex_error. |
2375 | */ |
2376 | template<typename _Ch_type, class _Alloc, class _Rx_traits> |
2377 | inline bool |
2378 | regex_search(const _Ch_type* __s, |
2379 | match_results<const _Ch_type*, _Alloc>& __m, |
2380 | const basic_regex<_Ch_type, _Rx_traits>& __e, |
2381 | regex_constants::match_flag_type __f |
2382 | = regex_constants::match_default) |
2383 | { return regex_search(__s, __s + _Rx_traits::length(__s), __m, __e, __f); } |
2384 | |
2385 | /** |
2386 | * @brief Searches for a regular expression within a C-string. |
2387 | * @param __s [IN] The C-string to search. |
2388 | * @param __e [IN] The regular expression to search for. |
2389 | * @param __f [IN] Search policy flags. |
2390 | * @retval true A match was found within the string. |
2391 | * @retval false No match was found within the string. |
2392 | * |
2393 | * @throws an exception of type regex_error. |
2394 | */ |
2395 | template<typename _Ch_type, typename _Rx_traits> |
2396 | inline bool |
2397 | regex_search(const _Ch_type* __s, |
2398 | const basic_regex<_Ch_type, _Rx_traits>& __e, |
2399 | regex_constants::match_flag_type __f |
2400 | = regex_constants::match_default) |
2401 | { return regex_search(__s, __s + _Rx_traits::length(__s), __e, __f); } |
2402 | |
2403 | /** |
2404 | * @brief Searches for a regular expression within a string. |
2405 | * @param __s [IN] The string to search. |
2406 | * @param __e [IN] The regular expression to search for. |
2407 | * @param __flags [IN] Search policy flags. |
2408 | * @retval true A match was found within the string. |
2409 | * @retval false No match was found within the string. |
2410 | * |
2411 | * @throws an exception of type regex_error. |
2412 | */ |
2413 | template<typename _Ch_traits, typename _String_allocator, |
2414 | typename _Ch_type, typename _Rx_traits> |
2415 | inline bool |
2416 | regex_search(const basic_string<_Ch_type, _Ch_traits, |
2417 | _String_allocator>& __s, |
2418 | const basic_regex<_Ch_type, _Rx_traits>& __e, |
2419 | regex_constants::match_flag_type __flags |
2420 | = regex_constants::match_default) |
2421 | { return regex_search(__s.begin(), __s.end(), __e, __flags); } |
2422 | |
2423 | /** |
2424 | * @brief Searches for a regular expression within a string. |
2425 | * @param __s [IN] A C++ string to search for the regex. |
2426 | * @param __m [OUT] The set of regex matches. |
2427 | * @param __e [IN] The regex to search for in @p s. |
2428 | * @param __f [IN] The search flags. |
2429 | * @retval true A match was found within the string. |
2430 | * @retval false No match was found within the string, the content of %m is |
2431 | * undefined. |
2432 | * |
2433 | * @throws an exception of type regex_error. |
2434 | */ |
2435 | template<typename _Ch_traits, typename _Ch_alloc, |
2436 | typename _Alloc, typename _Ch_type, |
2437 | typename _Rx_traits> |
2438 | inline bool |
2439 | regex_search(const basic_string<_Ch_type, _Ch_traits, _Ch_alloc>& __s, |
2440 | match_results<typename basic_string<_Ch_type, |
2441 | _Ch_traits, _Ch_alloc>::const_iterator, _Alloc>& __m, |
2442 | const basic_regex<_Ch_type, _Rx_traits>& __e, |
2443 | regex_constants::match_flag_type __f |
2444 | = regex_constants::match_default) |
2445 | { return regex_search(__s.begin(), __s.end(), __m, __e, __f); } |
2446 | |
2447 | // _GLIBCXX_RESOLVE_LIB_DEFECTS |
2448 | // 2329. regex_search() with match_results should forbid temporary strings |
2449 | /// Prevent unsafe attempts to get match_results from a temporary string. |
2450 | template<typename _Ch_traits, typename _Ch_alloc, |
2451 | typename _Alloc, typename _Ch_type, |
2452 | typename _Rx_traits> |
2453 | bool |
2454 | regex_search(const basic_string<_Ch_type, _Ch_traits, _Ch_alloc>&&, |
2455 | match_results<typename basic_string<_Ch_type, |
2456 | _Ch_traits, _Ch_alloc>::const_iterator, _Alloc>&, |
2457 | const basic_regex<_Ch_type, _Rx_traits>&, |
2458 | regex_constants::match_flag_type |
2459 | = regex_constants::match_default) = delete; |
2460 | |
2461 | // std [28.11.4] Function template regex_replace |
2462 | /** |
2463 | * @brief Search for a regular expression within a range for multiple times, |
2464 | and replace the matched parts through filling a format string. |
2465 | * @param __out [OUT] The output iterator. |
2466 | * @param __first [IN] The start of the string to search. |
2467 | * @param __last [IN] One-past-the-end of the string to search. |
2468 | * @param __e [IN] The regular expression to search for. |
2469 | * @param __fmt [IN] The format string. |
2470 | * @param __flags [IN] Search and replace policy flags. |
2471 | * |
2472 | * @returns __out |
2473 | * @throws an exception of type regex_error. |
2474 | */ |
2475 | template<typename _Out_iter, typename _Bi_iter, |
2476 | typename _Rx_traits, typename _Ch_type, |
2477 | typename _St, typename _Sa> |
2478 | inline _Out_iter |
2479 | regex_replace(_Out_iter __out, _Bi_iter __first, _Bi_iter __last, |
2480 | const basic_regex<_Ch_type, _Rx_traits>& __e, |
2481 | const basic_string<_Ch_type, _St, _Sa>& __fmt, |
2482 | regex_constants::match_flag_type __flags |
2483 | = regex_constants::match_default) |
2484 | { |
2485 | return regex_replace(__out, __first, __last, __e, __fmt.c_str(), __flags); |
2486 | } |
2487 | |
2488 | /** |
2489 | * @brief Search for a regular expression within a range for multiple times, |
2490 | and replace the matched parts through filling a format C-string. |
2491 | * @param __out [OUT] The output iterator. |
2492 | * @param __first [IN] The start of the string to search. |
2493 | * @param __last [IN] One-past-the-end of the string to search. |
2494 | * @param __e [IN] The regular expression to search for. |
2495 | * @param __fmt [IN] The format C-string. |
2496 | * @param __flags [IN] Search and replace policy flags. |
2497 | * |
2498 | * @returns __out |
2499 | * @throws an exception of type regex_error. |
2500 | */ |
2501 | template<typename _Out_iter, typename _Bi_iter, |
2502 | typename _Rx_traits, typename _Ch_type> |
2503 | _Out_iter |
2504 | regex_replace(_Out_iter __out, _Bi_iter __first, _Bi_iter __last, |
2505 | const basic_regex<_Ch_type, _Rx_traits>& __e, |
2506 | const _Ch_type* __fmt, |
2507 | regex_constants::match_flag_type __flags |
2508 | = regex_constants::match_default); |
2509 | |
2510 | /** |
2511 | * @brief Search for a regular expression within a string for multiple times, |
2512 | and replace the matched parts through filling a format string. |
2513 | * @param __s [IN] The string to search and replace. |
2514 | * @param __e [IN] The regular expression to search for. |
2515 | * @param __fmt [IN] The format string. |
2516 | * @param __flags [IN] Search and replace policy flags. |
2517 | * |
2518 | * @returns The string after replacing. |
2519 | * @throws an exception of type regex_error. |
2520 | */ |
2521 | template<typename _Rx_traits, typename _Ch_type, |
2522 | typename _St, typename _Sa, typename _Fst, typename _Fsa> |
2523 | inline basic_string<_Ch_type, _St, _Sa> |
2524 | regex_replace(const basic_string<_Ch_type, _St, _Sa>& __s, |
2525 | const basic_regex<_Ch_type, _Rx_traits>& __e, |
2526 | const basic_string<_Ch_type, _Fst, _Fsa>& __fmt, |
2527 | regex_constants::match_flag_type __flags |
2528 | = regex_constants::match_default) |
2529 | { |
2530 | basic_string<_Ch_type, _St, _Sa> __result; |
2531 | regex_replace(std::back_inserter(__result), |
2532 | __s.begin(), __s.end(), __e, __fmt, __flags); |
2533 | return __result; |
2534 | } |
2535 | |
2536 | /** |
2537 | * @brief Search for a regular expression within a string for multiple times, |
2538 | and replace the matched parts through filling a format C-string. |
2539 | * @param __s [IN] The string to search and replace. |
2540 | * @param __e [IN] The regular expression to search for. |
2541 | * @param __fmt [IN] The format C-string. |
2542 | * @param __flags [IN] Search and replace policy flags. |
2543 | * |
2544 | * @returns The string after replacing. |
2545 | * @throws an exception of type regex_error. |
2546 | */ |
2547 | template<typename _Rx_traits, typename _Ch_type, |
2548 | typename _St, typename _Sa> |
2549 | inline basic_string<_Ch_type, _St, _Sa> |
2550 | regex_replace(const basic_string<_Ch_type, _St, _Sa>& __s, |
2551 | const basic_regex<_Ch_type, _Rx_traits>& __e, |
2552 | const _Ch_type* __fmt, |
2553 | regex_constants::match_flag_type __flags |
2554 | = regex_constants::match_default) |
2555 | { |
2556 | basic_string<_Ch_type, _St, _Sa> __result; |
2557 | regex_replace(std::back_inserter(__result), |
2558 | __s.begin(), __s.end(), __e, __fmt, __flags); |
2559 | return __result; |
2560 | } |
2561 | |
2562 | /** |
2563 | * @brief Search for a regular expression within a C-string for multiple |
2564 | times, and replace the matched parts through filling a format string. |
2565 | * @param __s [IN] The C-string to search and replace. |
2566 | * @param __e [IN] The regular expression to search for. |
2567 | * @param __fmt [IN] The format string. |
2568 | * @param __flags [IN] Search and replace policy flags. |
2569 | * |
2570 | * @returns The string after replacing. |
2571 | * @throws an exception of type regex_error. |
2572 | */ |
2573 | template<typename _Rx_traits, typename _Ch_type, |
2574 | typename _St, typename _Sa> |
2575 | inline basic_string<_Ch_type> |
2576 | regex_replace(const _Ch_type* __s, |
2577 | const basic_regex<_Ch_type, _Rx_traits>& __e, |
2578 | const basic_string<_Ch_type, _St, _Sa>& __fmt, |
2579 | regex_constants::match_flag_type __flags |
2580 | = regex_constants::match_default) |
2581 | { |
2582 | basic_string<_Ch_type> __result; |
2583 | regex_replace(std::back_inserter(__result), __s, |
2584 | __s + char_traits<_Ch_type>::length(__s), |
2585 | __e, __fmt, __flags); |
2586 | return __result; |
2587 | } |
2588 | |
2589 | /** |
2590 | * @brief Search for a regular expression within a C-string for multiple |
2591 | times, and replace the matched parts through filling a format C-string. |
2592 | * @param __s [IN] The C-string to search and replace. |
2593 | * @param __e [IN] The regular expression to search for. |
2594 | * @param __fmt [IN] The format C-string. |
2595 | * @param __flags [IN] Search and replace policy flags. |
2596 | * |
2597 | * @returns The string after replacing. |
2598 | * @throws an exception of type regex_error. |
2599 | */ |
2600 | template<typename _Rx_traits, typename _Ch_type> |
2601 | inline basic_string<_Ch_type> |
2602 | regex_replace(const _Ch_type* __s, |
2603 | const basic_regex<_Ch_type, _Rx_traits>& __e, |
2604 | const _Ch_type* __fmt, |
2605 | regex_constants::match_flag_type __flags |
2606 | = regex_constants::match_default) |
2607 | { |
2608 | basic_string<_Ch_type> __result; |
2609 | regex_replace(std::back_inserter(__result), __s, |
2610 | __s + char_traits<_Ch_type>::length(__s), |
2611 | __e, __fmt, __flags); |
2612 | return __result; |
2613 | } |
2614 | |
2615 | ///@} |
2616 | |
2617 | _GLIBCXX_BEGIN_NAMESPACE_CXX11 |
2618 | |
2619 | // std [28.12] Class template regex_iterator |
2620 | /** |
2621 | * An iterator adaptor that will provide repeated calls of regex_search over |
2622 | * a range until no more matches remain. |
2623 | */ |
2624 | template<typename _Bi_iter, |
2625 | typename _Ch_type = typename iterator_traits<_Bi_iter>::value_type, |
2626 | typename _Rx_traits = regex_traits<_Ch_type> > |
2627 | class regex_iterator |
2628 | { |
2629 | public: |
2630 | typedef basic_regex<_Ch_type, _Rx_traits> regex_type; |
2631 | typedef match_results<_Bi_iter> value_type; |
2632 | typedef std::ptrdiff_t difference_type; |
2633 | typedef const value_type* pointer; |
2634 | typedef const value_type& reference; |
2635 | typedef std::forward_iterator_tag iterator_category; |
2636 | |
2637 | /** |
2638 | * @brief Provides a singular iterator, useful for indicating |
2639 | * one-past-the-end of a range. |
2640 | */ |
2641 | regex_iterator() = default; |
2642 | |
2643 | /** |
2644 | * Constructs a %regex_iterator... |
2645 | * @param __a [IN] The start of a text range to search. |
2646 | * @param __b [IN] One-past-the-end of the text range to search. |
2647 | * @param __re [IN] The regular expression to match. |
2648 | * @param __m [IN] Policy flags for match rules. |
2649 | */ |
2650 | regex_iterator(_Bi_iter __a, _Bi_iter __b, const regex_type& __re, |
2651 | regex_constants::match_flag_type __m |
2652 | = regex_constants::match_default) |
2653 | : _M_begin(__a), _M_end(__b), _M_pregex(&__re), _M_flags(__m), _M_match() |
2654 | { |
2655 | if (!regex_search(_M_begin, _M_end, _M_match, *_M_pregex, _M_flags)) |
2656 | *this = regex_iterator(); |
2657 | } |
2658 | |
2659 | // _GLIBCXX_RESOLVE_LIB_DEFECTS |
2660 | // 2332. regex_iterator should forbid temporary regexes |
2661 | regex_iterator(_Bi_iter, _Bi_iter, const regex_type&&, |
2662 | regex_constants::match_flag_type |
2663 | = regex_constants::match_default) = delete; |
2664 | |
2665 | /// Copy constructs a %regex_iterator. |
2666 | regex_iterator(const regex_iterator&) = default; |
2667 | |
2668 | /// Copy assigns one %regex_iterator to another. |
2669 | regex_iterator& |
2670 | operator=(const regex_iterator&) = default; |
2671 | |
2672 | ~regex_iterator() = default; |
2673 | |
2674 | /** |
2675 | * @brief Tests the equivalence of two regex iterators. |
2676 | */ |
2677 | bool |
2678 | operator==(const regex_iterator&) const noexcept; |
2679 | |
2680 | /** |
2681 | * @brief Tests the inequivalence of two regex iterators. |
2682 | */ |
2683 | bool |
2684 | operator!=(const regex_iterator& __rhs) const noexcept |
2685 | { return !(*this == __rhs); } |
2686 | |
2687 | /** |
2688 | * @brief Dereferences a %regex_iterator. |
2689 | */ |
2690 | const value_type& |
2691 | operator*() const noexcept |
2692 | { return _M_match; } |
2693 | |
2694 | /** |
2695 | * @brief Selects a %regex_iterator member. |
2696 | */ |
2697 | const value_type* |
2698 | operator->() const noexcept |
2699 | { return &_M_match; } |
2700 | |
2701 | /** |
2702 | * @brief Increments a %regex_iterator. |
2703 | */ |
2704 | regex_iterator& |
2705 | operator++(); |
2706 | |
2707 | /** |
2708 | * @brief Postincrements a %regex_iterator. |
2709 | */ |
2710 | regex_iterator |
2711 | operator++(int) |
2712 | { |
2713 | auto __tmp = *this; |
2714 | ++(*this); |
2715 | return __tmp; |
2716 | } |
2717 | |
2718 | private: |
2719 | _Bi_iter _M_begin {}; |
2720 | _Bi_iter _M_end {}; |
2721 | const regex_type* _M_pregex = nullptr; |
2722 | regex_constants::match_flag_type _M_flags {}; |
2723 | match_results<_Bi_iter> _M_match; |
2724 | }; |
2725 | |
2726 | typedef regex_iterator<const char*> cregex_iterator; |
2727 | typedef regex_iterator<string::const_iterator> sregex_iterator; |
2728 | #ifdef _GLIBCXX_USE_WCHAR_T |
2729 | typedef regex_iterator<const wchar_t*> wcregex_iterator; |
2730 | typedef regex_iterator<wstring::const_iterator> wsregex_iterator; |
2731 | #endif |
2732 | |
2733 | // [7.12.2] Class template regex_token_iterator |
2734 | /** |
2735 | * Iterates over submatches in a range (or @a splits a text string). |
2736 | * |
2737 | * The purpose of this iterator is to enumerate all, or all specified, |
2738 | * matches of a regular expression within a text range. The dereferenced |
2739 | * value of an iterator of this class is a std::sub_match object. |
2740 | */ |
2741 | template<typename _Bi_iter, |
2742 | typename _Ch_type = typename iterator_traits<_Bi_iter>::value_type, |
2743 | typename _Rx_traits = regex_traits<_Ch_type> > |
2744 | class regex_token_iterator |
2745 | { |
2746 | public: |
2747 | typedef basic_regex<_Ch_type, _Rx_traits> regex_type; |
2748 | typedef sub_match<_Bi_iter> value_type; |
2749 | typedef std::ptrdiff_t difference_type; |
2750 | typedef const value_type* pointer; |
2751 | typedef const value_type& reference; |
2752 | typedef std::forward_iterator_tag iterator_category; |
2753 | |
2754 | public: |
2755 | /** |
2756 | * @brief Default constructs a %regex_token_iterator. |
2757 | * |
2758 | * A default-constructed %regex_token_iterator is a singular iterator |
2759 | * that will compare equal to the one-past-the-end value for any |
2760 | * iterator of the same type. |
2761 | */ |
2762 | regex_token_iterator() |
2763 | : _M_position(), _M_subs(), _M_suffix(), _M_n(0), _M_result(nullptr), |
2764 | _M_has_m1(false) |
2765 | { } |
2766 | |
2767 | /** |
2768 | * Constructs a %regex_token_iterator... |
2769 | * @param __a [IN] The start of the text to search. |
2770 | * @param __b [IN] One-past-the-end of the text to search. |
2771 | * @param __re [IN] The regular expression to search for. |
2772 | * @param __submatch [IN] Which submatch to return. There are some |
2773 | * special values for this parameter: |
2774 | * - -1 each enumerated subexpression does NOT |
2775 | * match the regular expression (aka field |
2776 | * splitting) |
2777 | * - 0 the entire string matching the |
2778 | * subexpression is returned for each match |
2779 | * within the text. |
2780 | * - >0 enumerates only the indicated |
2781 | * subexpression from a match within the text. |
2782 | * @param __m [IN] Policy flags for match rules. |
2783 | */ |
2784 | regex_token_iterator(_Bi_iter __a, _Bi_iter __b, const regex_type& __re, |
2785 | int __submatch = 0, |
2786 | regex_constants::match_flag_type __m |
2787 | = regex_constants::match_default) |
2788 | : _M_position(__a, __b, __re, __m), _M_subs(1, __submatch), _M_n(0) |
2789 | { _M_init(__a, __b); } |
2790 | |
2791 | /** |
2792 | * Constructs a %regex_token_iterator... |
2793 | * @param __a [IN] The start of the text to search. |
2794 | * @param __b [IN] One-past-the-end of the text to search. |
2795 | * @param __re [IN] The regular expression to search for. |
2796 | * @param __submatches [IN] A list of subexpressions to return for each |
2797 | * regular expression match within the text. |
2798 | * @param __m [IN] Policy flags for match rules. |
2799 | */ |
2800 | regex_token_iterator(_Bi_iter __a, _Bi_iter __b, |
2801 | const regex_type& __re, |
2802 | const std::vector<int>& __submatches, |
2803 | regex_constants::match_flag_type __m |
2804 | = regex_constants::match_default) |
2805 | : _M_position(__a, __b, __re, __m), _M_subs(__submatches), _M_n(0) |
2806 | { _M_init(__a, __b); } |
2807 | |
2808 | /** |
2809 | * Constructs a %regex_token_iterator... |
2810 | * @param __a [IN] The start of the text to search. |
2811 | * @param __b [IN] One-past-the-end of the text to search. |
2812 | * @param __re [IN] The regular expression to search for. |
2813 | * @param __submatches [IN] A list of subexpressions to return for each |
2814 | * regular expression match within the text. |
2815 | * @param __m [IN] Policy flags for match rules. |
2816 | */ |
2817 | regex_token_iterator(_Bi_iter __a, _Bi_iter __b, |
2818 | const regex_type& __re, |
2819 | initializer_list<int> __submatches, |
2820 | regex_constants::match_flag_type __m |
2821 | = regex_constants::match_default) |
2822 | : _M_position(__a, __b, __re, __m), _M_subs(__submatches), _M_n(0) |
2823 | { _M_init(__a, __b); } |
2824 | |
2825 | /** |
2826 | * Constructs a %regex_token_iterator... |
2827 | * @param __a [IN] The start of the text to search. |
2828 | * @param __b [IN] One-past-the-end of the text to search. |
2829 | * @param __re [IN] The regular expression to search for. |
2830 | * @param __submatches [IN] A list of subexpressions to return for each |
2831 | * regular expression match within the text. |
2832 | * @param __m [IN] Policy flags for match rules. |
2833 | */ |
2834 | template<std::size_t _Nm> |
2835 | regex_token_iterator(_Bi_iter __a, _Bi_iter __b, |
2836 | const regex_type& __re, |
2837 | const int (&__submatches)[_Nm], |
2838 | regex_constants::match_flag_type __m |
2839 | = regex_constants::match_default) |
2840 | : _M_position(__a, __b, __re, __m), |
2841 | _M_subs(__submatches, __submatches + _Nm), _M_n(0) |
2842 | { _M_init(__a, __b); } |
2843 | |
2844 | // _GLIBCXX_RESOLVE_LIB_DEFECTS |
2845 | // 2332. regex_token_iterator should forbid temporary regexes |
2846 | regex_token_iterator(_Bi_iter, _Bi_iter, const regex_type&&, int = 0, |
2847 | regex_constants::match_flag_type = |
2848 | regex_constants::match_default) = delete; |
2849 | regex_token_iterator(_Bi_iter, _Bi_iter, const regex_type&&, |
2850 | const std::vector<int>&, |
2851 | regex_constants::match_flag_type = |
2852 | regex_constants::match_default) = delete; |
2853 | regex_token_iterator(_Bi_iter, _Bi_iter, const regex_type&&, |
2854 | initializer_list<int>, |
2855 | regex_constants::match_flag_type = |
2856 | regex_constants::match_default) = delete; |
2857 | template <std::size_t _Nm> |
2858 | regex_token_iterator(_Bi_iter, _Bi_iter, const regex_type&&, |
2859 | const int (&)[_Nm], |
2860 | regex_constants::match_flag_type = |
2861 | regex_constants::match_default) = delete; |
2862 | |
2863 | /** |
2864 | * @brief Copy constructs a %regex_token_iterator. |
2865 | * @param __rhs [IN] A %regex_token_iterator to copy. |
2866 | */ |
2867 | regex_token_iterator(const regex_token_iterator& __rhs) |
2868 | : _M_position(__rhs._M_position), _M_subs(__rhs._M_subs), |
2869 | _M_suffix(__rhs._M_suffix), _M_n(__rhs._M_n), _M_has_m1(__rhs._M_has_m1) |
2870 | { _M_normalize_result(); } |
2871 | |
2872 | /** |
2873 | * @brief Assigns a %regex_token_iterator to another. |
2874 | * @param __rhs [IN] A %regex_token_iterator to copy. |
2875 | */ |
2876 | regex_token_iterator& |
2877 | operator=(const regex_token_iterator& __rhs); |
2878 | |
2879 | /** |
2880 | * @brief Compares a %regex_token_iterator to another for equality. |
2881 | */ |
2882 | bool |
2883 | operator==(const regex_token_iterator& __rhs) const; |
2884 | |
2885 | /** |
2886 | * @brief Compares a %regex_token_iterator to another for inequality. |
2887 | */ |
2888 | bool |
2889 | operator!=(const regex_token_iterator& __rhs) const |
2890 | { return !(*this == __rhs); } |
2891 | |
2892 | /** |
2893 | * @brief Dereferences a %regex_token_iterator. |
2894 | */ |
2895 | const value_type& |
2896 | operator*() const |
2897 | { return *_M_result; } |
2898 | |
2899 | /** |
2900 | * @brief Selects a %regex_token_iterator member. |
2901 | */ |
2902 | const value_type* |
2903 | operator->() const |
2904 | { return _M_result; } |
2905 | |
2906 | /** |
2907 | * @brief Increments a %regex_token_iterator. |
2908 | */ |
2909 | regex_token_iterator& |
2910 | operator++(); |
2911 | |
2912 | /** |
2913 | * @brief Postincrements a %regex_token_iterator. |
2914 | */ |
2915 | regex_token_iterator |
2916 | operator++(int) |
2917 | { |
2918 | auto __tmp = *this; |
2919 | ++(*this); |
2920 | return __tmp; |
2921 | } |
2922 | |
2923 | private: |
2924 | typedef regex_iterator<_Bi_iter, _Ch_type, _Rx_traits> _Position; |
2925 | |
2926 | void |
2927 | _M_init(_Bi_iter __a, _Bi_iter __b); |
2928 | |
2929 | const value_type& |
2930 | _M_current_match() const |
2931 | { |
2932 | if (_M_subs[_M_n] == -1) |
2933 | return (*_M_position).prefix(); |
2934 | else |
2935 | return (*_M_position)[_M_subs[_M_n]]; |
2936 | } |
2937 | |
2938 | constexpr bool |
2939 | _M_end_of_seq() const |
2940 | { return _M_result == nullptr; } |
2941 | |
2942 | // [28.12.2.2.4] |
2943 | void |
2944 | _M_normalize_result() |
2945 | { |
2946 | if (_M_position != _Position()) |
2947 | _M_result = &_M_current_match(); |
2948 | else if (_M_has_m1) |
2949 | _M_result = &_M_suffix; |
2950 | else |
2951 | _M_result = nullptr; |
2952 | } |
2953 | |
2954 | _Position _M_position; |
2955 | std::vector<int> _M_subs; |
2956 | value_type _M_suffix; |
2957 | std::size_t _M_n; |
2958 | const value_type* _M_result; |
2959 | |
2960 | // Show whether _M_subs contains -1 |
2961 | bool _M_has_m1; |
2962 | }; |
2963 | |
2964 | /** @brief Token iterator for C-style NULL-terminated strings. */ |
2965 | typedef regex_token_iterator<const char*> cregex_token_iterator; |
2966 | |
2967 | /** @brief Token iterator for standard strings. */ |
2968 | typedef regex_token_iterator<string::const_iterator> sregex_token_iterator; |
2969 | |
2970 | #ifdef _GLIBCXX_USE_WCHAR_T |
2971 | /** @brief Token iterator for C-style NULL-terminated wide strings. */ |
2972 | typedef regex_token_iterator<const wchar_t*> wcregex_token_iterator; |
2973 | |
2974 | /** @brief Token iterator for standard wide-character strings. */ |
2975 | typedef regex_token_iterator<wstring::const_iterator> wsregex_token_iterator; |
2976 | #endif |
2977 | |
2978 | ///@} // group regex |
2979 | |
2980 | _GLIBCXX_END_NAMESPACE_CXX11 |
2981 | _GLIBCXX_END_NAMESPACE_VERSION |
2982 | } // namespace |
2983 | |
2984 | #include <bits/regex.tcc> |
2985 | |