1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 
10 // <regex>
11 
12 // template <class BidirectionalIterator, class Allocator, class charT, class traits>
13 //     bool
14 //     regex_search(BidirectionalIterator first, BidirectionalIterator last,
15 //                  match_results<BidirectionalIterator, Allocator>& m,
16 //                  const basic_regex<charT, traits>& e,
17 //                  regex_constants::match_flag_type flags = regex_constants::match_default);
18 
19 #include <regex>
20 #include <cassert>
21 #include "test_macros.h"
22 #include "test_iterators.h"
23 
24 int main(int, char**)
25 {
26     {
27         std::cmatch m;
28         assert(!std::regex_search("a", m, std::regex()));
29         assert(m.size() == 0);
30         assert(m.empty());
31     }
32     {
33         std::cmatch m;
34         const char s[] = "a";
35         assert(std::regex_search(s, m, std::regex("a", std::regex_constants::basic)));
36         assert(m.size() == 1);
37         assert(!m.empty());
38         assert(!m.prefix().matched);
39         assert(m.prefix().first == s);
40         assert(m.prefix().second == m[0].first);
41         assert(!m.suffix().matched);
42         assert(m.suffix().first == m[0].second);
43         assert(m.suffix().second == s+1);
44         assert(m.length(0) == 1);
45         assert(m.position(0) == 0);
46         assert(m.str(0) == "a");
47     }
48     {
49         std::cmatch m;
50         const char s[] = "ab";
51         assert(std::regex_search(s, m, std::regex("ab", std::regex_constants::basic)));
52         assert(m.size() == 1);
53         assert(!m.prefix().matched);
54         assert(m.prefix().first == s);
55         assert(m.prefix().second == m[0].first);
56         assert(!m.suffix().matched);
57         assert(m.suffix().first == m[0].second);
58         assert(m.suffix().second == s+2);
59         assert(m.length(0) == 2);
60         assert(m.position(0) == 0);
61         assert(m.str(0) == "ab");
62     }
63     {
64         std::cmatch m;
65         const char s[] = "ab";
66         assert(!std::regex_search(s, m, std::regex("ba", std::regex_constants::basic)));
67         assert(m.size() == 0);
68         assert(m.empty());
69     }
70     {
71         std::cmatch m;
72         const char s[] = "aab";
73         assert(std::regex_search(s, m, std::regex("ab", std::regex_constants::basic)));
74         assert(m.size() == 1);
75         assert(m.prefix().matched);
76         assert(m.prefix().first == s);
77         assert(m.prefix().second == m[0].first);
78         assert(!m.suffix().matched);
79         assert(m.suffix().first == m[0].second);
80         assert(m.suffix().second == s+3);
81         assert(m.length(0) == 2);
82         assert(m.position(0) == 1);
83         assert(m.str(0) == "ab");
84     }
85     {
86         std::cmatch m;
87         const char s[] = "aab";
88         assert(!std::regex_search(s, m, std::regex("ab", std::regex_constants::basic),
89                                             std::regex_constants::match_continuous));
90         assert(m.size() == 0);
91     }
92     {
93         std::cmatch m;
94         const char s[] = "abcd";
95         assert(std::regex_search(s, m, std::regex("bc", std::regex_constants::basic)));
96         assert(m.size() == 1);
97         assert(m.prefix().matched);
98         assert(m.prefix().first == s);
99         assert(m.prefix().second == m[0].first);
100         assert(m.suffix().matched);
101         assert(m.suffix().first == m[0].second);
102         assert(m.suffix().second == s+4);
103         assert(m.length(0) == 2);
104         assert(m.position(0) == 1);
105         assert(m.str(0) == "bc");
106     }
107     {
108         std::cmatch m;
109         const char s[] = "abbc";
110         assert(std::regex_search(s, m, std::regex("ab*c", std::regex_constants::basic)));
111         assert(m.size() == 1);
112         assert(!m.prefix().matched);
113         assert(m.prefix().first == s);
114         assert(m.prefix().second == m[0].first);
115         assert(!m.suffix().matched);
116         assert(m.suffix().first == m[0].second);
117         assert(m.suffix().second == s+4);
118         assert(m.length(0) == 4);
119         assert(m.position(0) == 0);
120         assert(m.str(0) == s);
121     }
122     {
123         std::cmatch m;
124         const char s[] = "ababc";
125         assert(std::regex_search(s, m, std::regex("\\(ab\\)*c", std::regex_constants::basic)));
126         assert(m.size() == 2);
127         assert(!m.prefix().matched);
128         assert(m.prefix().first == s);
129         assert(m.prefix().second == m[0].first);
130         assert(!m.suffix().matched);
131         assert(m.suffix().first == m[0].second);
132         assert(m.suffix().second == s+5);
133         assert(m.length(0) == 5);
134         assert(m.position(0) == 0);
135         assert(m.str(0) == s);
136         assert(m.length(1) == 2);
137         assert(m.position(1) == 2);
138         assert(m.str(1) == "ab");
139     }
140     {
141         std::cmatch m;
142         const char s[] = "abcdefghijk";
143         assert(std::regex_search(s, m, std::regex("cd\\(\\(e\\)fg\\)hi",
144                                  std::regex_constants::basic)));
145         assert(m.size() == 3);
146         assert(m.prefix().matched);
147         assert(m.prefix().first == s);
148         assert(m.prefix().second == m[0].first);
149         assert(m.suffix().matched);
150         assert(m.suffix().first == m[0].second);
151         assert(m.suffix().second == s+std::regex_traits<char>::length(s));
152         assert(m.length(0) == 7);
153         assert(m.position(0) == 2);
154         assert(m.str(0) == "cdefghi");
155         assert(m.length(1) == 3);
156         assert(m.position(1) == 4);
157         assert(m.str(1) == "efg");
158         assert(m.length(2) == 1);
159         assert(m.position(2) == 4);
160         assert(m.str(2) == "e");
161     }
162     {
163         std::cmatch m;
164         const char s[] = "abc";
165         assert(std::regex_search(s, m, std::regex("^abc", std::regex_constants::basic)));
166         assert(m.size() == 1);
167         assert(!m.prefix().matched);
168         assert(m.prefix().first == s);
169         assert(m.prefix().second == m[0].first);
170         assert(!m.suffix().matched);
171         assert(m.suffix().first == m[0].second);
172         assert(m.suffix().second == s+3);
173         assert(m.length(0) == 3);
174         assert(m.position(0) == 0);
175         assert(m.str(0) == s);
176     }
177     {
178         std::cmatch m;
179         const char s[] = "abcd";
180         assert(std::regex_search(s, m, std::regex("^abc", std::regex_constants::basic)));
181         assert(m.size() == 1);
182         assert(!m.prefix().matched);
183         assert(m.prefix().first == s);
184         assert(m.prefix().second == m[0].first);
185         assert(m.suffix().matched);
186         assert(m.suffix().first == m[0].second);
187         assert(m.suffix().second == s+4);
188         assert(m.length(0) == 3);
189         assert(m.position(0) == 0);
190         assert(m.str(0) == "abc");
191     }
192     {
193         std::cmatch m;
194         const char s[] = "aabc";
195         assert(!std::regex_search(s, m, std::regex("^abc", std::regex_constants::basic)));
196         assert(m.size() == 0);
197     }
198     {
199         std::cmatch m;
200         const char s[] = "abc";
201         assert(std::regex_search(s, m, std::regex("abc$", std::regex_constants::basic)));
202         assert(m.size() == 1);
203         assert(!m.prefix().matched);
204         assert(m.prefix().first == s);
205         assert(m.prefix().second == m[0].first);
206         assert(!m.suffix().matched);
207         assert(m.suffix().first == m[0].second);
208         assert(m.suffix().second == s+3);
209         assert(m.length(0) == 3);
210         assert(m.position(0) == 0);
211         assert(m.str(0) == s);
212     }
213     {
214         std::cmatch m;
215         const char s[] = "efabc";
216         assert(std::regex_search(s, m, std::regex("abc$", std::regex_constants::basic)));
217         assert(m.size() == 1);
218         assert(m.prefix().matched);
219         assert(m.prefix().first == s);
220         assert(m.prefix().second == m[0].first);
221         assert(!m.suffix().matched);
222         assert(m.suffix().first == m[0].second);
223         assert(m.suffix().second == s+5);
224         assert(m.length(0) == 3);
225         assert(m.position(0) == 2);
226         assert(m.str(0) == s+2);
227     }
228     {
229         std::cmatch m;
230         const char s[] = "efabcg";
231         assert(!std::regex_search(s, m, std::regex("abc$", std::regex_constants::basic)));
232         assert(m.size() == 0);
233     }
234     {
235         std::cmatch m;
236         const char s[] = "abc";
237         assert(std::regex_search(s, m, std::regex("a.c", std::regex_constants::basic)));
238         assert(m.size() == 1);
239         assert(!m.prefix().matched);
240         assert(m.prefix().first == s);
241         assert(m.prefix().second == m[0].first);
242         assert(!m.suffix().matched);
243         assert(m.suffix().first == m[0].second);
244         assert(m.suffix().second == s+3);
245         assert(m.length(0) == 3);
246         assert(m.position(0) == 0);
247         assert(m.str(0) == s);
248     }
249     {
250         std::cmatch m;
251         const char s[] = "acc";
252         assert(std::regex_search(s, m, std::regex("a.c", std::regex_constants::basic)));
253         assert(m.size() == 1);
254         assert(!m.prefix().matched);
255         assert(m.prefix().first == s);
256         assert(m.prefix().second == m[0].first);
257         assert(!m.suffix().matched);
258         assert(m.suffix().first == m[0].second);
259         assert(m.suffix().second == s+3);
260         assert(m.length(0) == 3);
261         assert(m.position(0) == 0);
262         assert(m.str(0) == s);
263     }
264     {
265         std::cmatch m;
266         const char s[] = "acc";
267         assert(std::regex_search(s, m, std::regex("a.c", std::regex_constants::basic)));
268         assert(m.size() == 1);
269         assert(!m.prefix().matched);
270         assert(m.prefix().first == s);
271         assert(m.prefix().second == m[0].first);
272         assert(!m.suffix().matched);
273         assert(m.suffix().first == m[0].second);
274         assert(m.suffix().second == s+3);
275         assert(m.length(0) == 3);
276         assert(m.position(0) == 0);
277         assert(m.str(0) == s);
278     }
279     {
280         std::cmatch m;
281         const char s[] = "abcdef";
282         assert(std::regex_search(s, m, std::regex("\\(.*\\).*", std::regex_constants::basic)));
283         assert(m.size() == 2);
284         assert(!m.prefix().matched);
285         assert(m.prefix().first == s);
286         assert(m.prefix().second == m[0].first);
287         assert(!m.suffix().matched);
288         assert(m.suffix().first == m[0].second);
289         assert(m.suffix().second == s+6);
290         assert(m.length(0) == 6);
291         assert(m.position(0) == 0);
292         assert(m.str(0) == s);
293         assert(m.length(1) == 6);
294         assert(m.position(1) == 0);
295         assert(m.str(1) == s);
296     }
297     {
298         std::cmatch m;
299         const char s[] = "bc";
300         assert(std::regex_search(s, m, std::regex("\\(a*\\)*", std::regex_constants::basic)));
301         assert(m.size() == 2);
302         assert(!m.prefix().matched);
303         assert(m.prefix().first == s);
304         assert(m.prefix().second == m[0].first);
305         assert(m.suffix().matched);
306         assert(m.suffix().first == m[0].second);
307         assert(m.suffix().second == s+2);
308         assert(m.length(0) == 0);
309         assert(m.position(0) == 0);
310         assert(m.str(0) == "");
311         assert(m.length(1) == 0);
312         assert(m.position(1) == 0);
313         assert(m.str(1) == "");
314     }
315     {
316         std::cmatch m;
317         const char s[] = "abbc";
318         assert(!std::regex_search(s, m, std::regex("ab\\{3,5\\}c", std::regex_constants::basic)));
319         assert(m.size() == 0);
320     }
321     {
322         std::cmatch m;
323         const char s[] = "abbbc";
324         assert(std::regex_search(s, m, std::regex("ab\\{3,5\\}c", std::regex_constants::basic)));
325         assert(m.size() == 1);
326         assert(!m.prefix().matched);
327         assert(m.prefix().first == s);
328         assert(m.prefix().second == m[0].first);
329         assert(!m.suffix().matched);
330         assert(m.suffix().first == m[0].second);
331         assert(m.suffix().second == m[0].second);
332         assert(m.length(0) == sizeof(s)-1);
333         assert(m.position(0) == 0);
334         assert(m.str(0) == s);
335     }
336     {
337         std::cmatch m;
338         const char s[] = "abbbbc";
339         assert(std::regex_search(s, m, std::regex("ab\\{3,5\\}c", std::regex_constants::basic)));
340         assert(m.size() == 1);
341         assert(!m.prefix().matched);
342         assert(m.prefix().first == s);
343         assert(m.prefix().second == m[0].first);
344         assert(!m.suffix().matched);
345         assert(m.suffix().first == m[0].second);
346         assert(m.suffix().second == m[0].second);
347         assert(m.length(0) == sizeof(s)-1);
348         assert(m.position(0) == 0);
349         assert(m.str(0) == s);
350     }
351     {
352         std::cmatch m;
353         const char s[] = "abbbbbc";
354         assert(std::regex_search(s, m, std::regex("ab\\{3,5\\}c", std::regex_constants::basic)));
355         assert(m.size() == 1);
356         assert(!m.prefix().matched);
357         assert(m.prefix().first == s);
358         assert(m.prefix().second == m[0].first);
359         assert(!m.suffix().matched);
360         assert(m.suffix().first == m[0].second);
361         assert(m.suffix().second == m[0].second);
362         assert(m.length(0) == sizeof(s)-1);
363         assert(m.position(0) == 0);
364         assert(m.str(0) == s);
365     }
366     {
367         std::cmatch m;
368         const char s[] = "adefc";
369         assert(!std::regex_search(s, m, std::regex("ab\\{3,5\\}c", std::regex_constants::basic)));
370         assert(m.size() == 0);
371     }
372     {
373         std::cmatch m;
374         const char s[] = "abbbbbbc";
375         assert(!std::regex_search(s, m, std::regex("ab\\{3,5\\}c", std::regex_constants::basic)));
376         assert(m.size() == 0);
377     }
378     {
379         std::cmatch m;
380         const char s[] = "adec";
381         assert(!std::regex_search(s, m, std::regex("a.\\{3,5\\}c", std::regex_constants::basic)));
382         assert(m.size() == 0);
383     }
384     {
385         std::cmatch m;
386         const char s[] = "adefc";
387         assert(std::regex_search(s, m, std::regex("a.\\{3,5\\}c", std::regex_constants::basic)));
388         assert(m.size() == 1);
389         assert(!m.prefix().matched);
390         assert(m.prefix().first == s);
391         assert(m.prefix().second == m[0].first);
392         assert(!m.suffix().matched);
393         assert(m.suffix().first == m[0].second);
394         assert(m.suffix().second == m[0].second);
395         assert(m.length(0) == sizeof(s)-1);
396         assert(m.position(0) == 0);
397         assert(m.str(0) == s);
398     }
399     {
400         std::cmatch m;
401         const char s[] = "adefgc";
402         assert(std::regex_search(s, m, std::regex("a.\\{3,5\\}c", std::regex_constants::basic)));
403         assert(m.size() == 1);
404         assert(!m.prefix().matched);
405         assert(m.prefix().first == s);
406         assert(m.prefix().second == m[0].first);
407         assert(!m.suffix().matched);
408         assert(m.suffix().first == m[0].second);
409         assert(m.suffix().second == m[0].second);
410         assert(m.length(0) == sizeof(s)-1);
411         assert(m.position(0) == 0);
412         assert(m.str(0) == s);
413     }
414     {
415         std::cmatch m;
416         const char s[] = "adefghc";
417         assert(std::regex_search(s, m, std::regex("a.\\{3,5\\}c", std::regex_constants::basic)));
418         assert(m.size() == 1);
419         assert(!m.prefix().matched);
420         assert(m.prefix().first == s);
421         assert(m.prefix().second == m[0].first);
422         assert(!m.suffix().matched);
423         assert(m.suffix().first == m[0].second);
424         assert(m.suffix().second == m[0].second);
425         assert(m.length(0) == sizeof(s)-1);
426         assert(m.position(0) == 0);
427         assert(m.str(0) == s);
428     }
429     {
430         std::cmatch m;
431         const char s[] = "adefghic";
432         assert(!std::regex_search(s, m, std::regex("a.\\{3,5\\}c", std::regex_constants::basic)));
433         assert(m.size() == 0);
434     }
435     {
436         std::cmatch m;
437         const char s[] = "-ab,ab-";
438         assert(std::regex_search(s, m, std::regex("-\\(.*\\),\\1-", std::regex_constants::basic)));
439         assert(m.size() == 2);
440         assert(!m.prefix().matched);
441         assert(m.prefix().first == s);
442         assert(m.prefix().second == m[0].first);
443         assert(!m.suffix().matched);
444         assert(m.suffix().first == m[0].second);
445         assert(m.suffix().second == m[0].second);
446         assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<char>::length(s));
447         assert(m.position(0) == 0);
448         assert(m.str(0) == s);
449         assert(m.length(1) == 2);
450         assert(m.position(1) == 1);
451         assert(m.str(1) == "ab");
452     }
453     {
454         std::cmatch m;
455         const char s[] = "ababbabb";
456         assert(std::regex_search(s, m, std::regex("^\\(ab*\\)*\\1$", std::regex_constants::basic)));
457         assert(m.size() == 2);
458         assert(!m.prefix().matched);
459         assert(m.prefix().first == s);
460         assert(m.prefix().second == m[0].first);
461         assert(!m.suffix().matched);
462         assert(m.suffix().first == m[0].second);
463         assert(m.suffix().second == m[0].second);
464         assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<char>::length(s));
465         assert(m.position(0) == 0);
466         assert(m.str(0) == s);
467         assert(m.length(1) == 3);
468         assert(m.position(1) == 2);
469         assert(m.str(1) == "abb");
470     }
471     {
472         std::cmatch m;
473         const char s[] = "ababbab";
474         assert(!std::regex_search(s, m, std::regex("^\\(ab*\\)*\\1$", std::regex_constants::basic)));
475         assert(m.size() == 0);
476     }
477     {
478         std::cmatch m;
479         const char s[] = "aBAbbAbB";
480         assert(std::regex_search(s, m, std::regex("^\\(Ab*\\)*\\1$",
481                    std::regex_constants::basic | std::regex_constants::icase)));
482         assert(m.size() == 2);
483         assert(!m.prefix().matched);
484         assert(m.prefix().first == s);
485         assert(m.prefix().second == m[0].first);
486         assert(!m.suffix().matched);
487         assert(m.suffix().first == m[0].second);
488         assert(m.suffix().second == m[0].second);
489         assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<char>::length(s));
490         assert(m.position(0) == 0);
491         assert(m.str(0) == s);
492         assert(m.length(1) == 3);
493         assert(m.position(1) == 2);
494         assert(m.str(1) == "Abb");
495     }
496     {
497         std::cmatch m;
498         const char s[] = "aBAbbAbB";
499         assert(!std::regex_search(s, m, std::regex("^\\(Ab*\\)*\\1$",
500                                                  std::regex_constants::basic)));
501         assert(m.size() == 0);
502     }
503     {
504         std::cmatch m;
505         const char s[] = "a";
506         assert(std::regex_search(s, m, std::regex("^[a]$",
507                                                  std::regex_constants::basic)));
508         assert(m.size() == 1);
509         assert(!m.prefix().matched);
510         assert(m.prefix().first == s);
511         assert(m.prefix().second == m[0].first);
512         assert(!m.suffix().matched);
513         assert(m.suffix().first == m[0].second);
514         assert(m.suffix().second == m[0].second);
515         assert(m.length(0) == 1);
516         assert(m.position(0) == 0);
517         assert(m.str(0) == "a");
518     }
519     {
520         std::cmatch m;
521         const char s[] = "a";
522         assert(std::regex_search(s, m, std::regex("^[ab]$",
523                                                  std::regex_constants::basic)));
524         assert(m.size() == 1);
525         assert(!m.prefix().matched);
526         assert(m.prefix().first == s);
527         assert(m.prefix().second == m[0].first);
528         assert(!m.suffix().matched);
529         assert(m.suffix().first == m[0].second);
530         assert(m.suffix().second == m[0].second);
531         assert(m.length(0) == 1);
532         assert(m.position(0) == 0);
533         assert(m.str(0) == "a");
534     }
535     {
536         std::cmatch m;
537         const char s[] = "c";
538         assert(std::regex_search(s, m, std::regex("^[a-f]$",
539                                                  std::regex_constants::basic)));
540         assert(m.size() == 1);
541         assert(!m.prefix().matched);
542         assert(m.prefix().first == s);
543         assert(m.prefix().second == m[0].first);
544         assert(!m.suffix().matched);
545         assert(m.suffix().first == m[0].second);
546         assert(m.suffix().second == m[0].second);
547         assert(m.length(0) == 1);
548         assert(m.position(0) == 0);
549         assert(m.str(0) == s);
550     }
551     {
552         std::cmatch m;
553         const char s[] = "g";
554         assert(!std::regex_search(s, m, std::regex("^[a-f]$",
555                                                  std::regex_constants::basic)));
556         assert(m.size() == 0);
557     }
558     {
559         std::cmatch m;
560         const char s[] = "Iraqi";
561         assert(std::regex_search(s, m, std::regex("q[^u]",
562                                                  std::regex_constants::basic)));
563         assert(m.size() == 1);
564         assert(m.prefix().matched);
565         assert(m.prefix().first == s);
566         assert(m.prefix().second == m[0].first);
567         assert(!m.suffix().matched);
568         assert(m.suffix().first == m[0].second);
569         assert(m.suffix().second == m[0].second);
570         assert(m.length(0) == 2);
571         assert(m.position(0) == 3);
572         assert(m.str(0) == "qi");
573     }
574     {
575         std::cmatch m;
576         const char s[] = "Iraq";
577         assert(!std::regex_search(s, m, std::regex("q[^u]",
578                                                  std::regex_constants::basic)));
579         assert(m.size() == 0);
580     }
581     {
582         std::cmatch m;
583         const char s[] = "AmB";
584         assert(std::regex_search(s, m, std::regex("A[[:lower:]]B",
585                                                  std::regex_constants::basic)));
586         assert(m.size() == 1);
587         assert(!m.prefix().matched);
588         assert(m.prefix().first == s);
589         assert(m.prefix().second == m[0].first);
590         assert(!m.suffix().matched);
591         assert(m.suffix().first == m[0].second);
592         assert(m.suffix().second == m[0].second);
593         assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<char>::length(s));
594         assert(m.position(0) == 0);
595         assert(m.str(0) == s);
596     }
597     {
598         std::cmatch m;
599         const char s[] = "AMB";
600         assert(!std::regex_search(s, m, std::regex("A[[:lower:]]B",
601                                                  std::regex_constants::basic)));
602         assert(m.size() == 0);
603     }
604     {
605         std::cmatch m;
606         const char s[] = "AMB";
607         assert(std::regex_search(s, m, std::regex("A[^[:lower:]]B",
608                                                  std::regex_constants::basic)));
609         assert(m.size() == 1);
610         assert(!m.prefix().matched);
611         assert(m.prefix().first == s);
612         assert(m.prefix().second == m[0].first);
613         assert(!m.suffix().matched);
614         assert(m.suffix().first == m[0].second);
615         assert(m.suffix().second == m[0].second);
616         assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<char>::length(s));
617         assert(m.position(0) == 0);
618         assert(m.str(0) == s);
619     }
620     {
621         std::cmatch m;
622         const char s[] = "AmB";
623         assert(!std::regex_search(s, m, std::regex("A[^[:lower:]]B",
624                                                  std::regex_constants::basic)));
625         assert(m.size() == 0);
626     }
627     {
628         std::cmatch m;
629         const char s[] = "A5B";
630         assert(!std::regex_search(s, m, std::regex("A[^[:lower:]0-9]B",
631                                                  std::regex_constants::basic)));
632         assert(m.size() == 0);
633     }
634     {
635         std::cmatch m;
636         const char s[] = "A?B";
637         assert(std::regex_search(s, m, std::regex("A[^[:lower:]0-9]B",
638                                                  std::regex_constants::basic)));
639         assert(m.size() == 1);
640         assert(!m.prefix().matched);
641         assert(m.prefix().first == s);
642         assert(m.prefix().second == m[0].first);
643         assert(!m.suffix().matched);
644         assert(m.suffix().first == m[0].second);
645         assert(m.suffix().second == m[0].second);
646         assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<char>::length(s));
647         assert(m.position(0) == 0);
648         assert(m.str(0) == s);
649     }
650     {
651         std::cmatch m;
652         const char s[] = "-";
653         assert(std::regex_search(s, m, std::regex("[a[.hyphen.]z]",
654                                                  std::regex_constants::basic)));
655         assert(m.size() == 1);
656         assert(!m.prefix().matched);
657         assert(m.prefix().first == s);
658         assert(m.prefix().second == m[0].first);
659         assert(!m.suffix().matched);
660         assert(m.suffix().first == m[0].second);
661         assert(m.suffix().second == m[0].second);
662         assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<char>::length(s));
663         assert(m.position(0) == 0);
664         assert(m.str(0) == s);
665     }
666     {
667         std::cmatch m;
668         const char s[] = "z";
669         assert(std::regex_search(s, m, std::regex("[a[.hyphen.]z]",
670                                                  std::regex_constants::basic)));
671         assert(m.size() == 1);
672         assert(!m.prefix().matched);
673         assert(m.prefix().first == s);
674         assert(m.prefix().second == m[0].first);
675         assert(!m.suffix().matched);
676         assert(m.suffix().first == m[0].second);
677         assert(m.suffix().second == m[0].second);
678         assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<char>::length(s));
679         assert(m.position(0) == 0);
680         assert(m.str(0) == s);
681     }
682     {
683         std::cmatch m;
684         const char s[] = "m";
685         assert(!std::regex_search(s, m, std::regex("[a[.hyphen.]z]",
686                                                  std::regex_constants::basic)));
687         assert(m.size() == 0);
688     }
689     {
690         std::cmatch m;
691         const char s[] = "01a45cef9";
692         assert(std::regex_search(s, m, std::regex("[ace1-9]*",
693                                                  std::regex_constants::basic)));
694         assert(m.size() == 1);
695         assert(!m.prefix().matched);
696         assert(m.prefix().first == s);
697         assert(m.prefix().second == m[0].first);
698         assert(m.suffix().matched);
699         assert(m.suffix().first == m[0].second);
700         assert(m.suffix().second == s + std::char_traits<char>::length(s));
701         assert(m.length(0) == 0);
702         assert(m.position(0) == 0);
703         assert(m.str(0) == "");
704     }
705     {
706         std::cmatch m;
707         const char s[] = "01a45cef9";
708         assert(std::regex_search(s, m, std::regex("[ace1-9]\\{1,\\}",
709                                                  std::regex_constants::basic)));
710         assert(m.size() == 1);
711         assert(m.prefix().matched);
712         assert(m.prefix().first == s);
713         assert(m.prefix().second == m[0].first);
714         assert(m.suffix().matched);
715         assert(m.suffix().first == m[0].second);
716         assert(m.suffix().second == s + std::char_traits<char>::length(s));
717         assert(m.length(0) == 6);
718         assert(m.position(0) == 1);
719         assert(m.str(0) == "1a45ce");
720     }
721     {
722         const char r[] = "^[-+]\\{0,1\\}[0-9]\\{1,\\}[CF]$";
723         std::ptrdiff_t sr = std::char_traits<char>::length(r);
724         typedef forward_iterator<const char*> FI;
725         typedef bidirectional_iterator<const char*> BI;
726         std::regex regex(FI(r), FI(r+sr), std::regex_constants::basic);
727         std::match_results<BI> m;
728         const char s[] = "-40C";
729         std::ptrdiff_t ss = std::char_traits<char>::length(s);
730         assert(std::regex_search(BI(s), BI(s+ss), m, regex));
731         assert(m.size() == 1);
732         assert(!m.prefix().matched);
733         assert(m.prefix().first == BI(s));
734         assert(m.prefix().second == m[0].first);
735         assert(!m.suffix().matched);
736         assert(m.suffix().first == m[0].second);
737         assert(m.suffix().second == m[0].second);
738         assert(m.length(0) == 4);
739         assert(m.position(0) == 0);
740         assert(m.str(0) == s);
741     }
742 
743     {
744         std::wcmatch m;
745         assert(!std::regex_search(L"a", m, std::wregex()));
746         assert(m.size() == 0);
747         assert(m.empty());
748     }
749     {
750         std::wcmatch m;
751         const wchar_t s[] = L"a";
752         assert(std::regex_search(s, m, std::wregex(L"a", std::regex_constants::basic)));
753         assert(m.size() == 1);
754         assert(!m.empty());
755         assert(!m.prefix().matched);
756         assert(m.prefix().first == s);
757         assert(m.prefix().second == m[0].first);
758         assert(!m.suffix().matched);
759         assert(m.suffix().first == m[0].second);
760         assert(m.suffix().second == s+1);
761         assert(m.length(0) == 1);
762         assert(m.position(0) == 0);
763         assert(m.str(0) == L"a");
764     }
765     {
766         std::wcmatch m;
767         const wchar_t s[] = L"ab";
768         assert(std::regex_search(s, m, std::wregex(L"ab", std::regex_constants::basic)));
769         assert(m.size() == 1);
770         assert(!m.prefix().matched);
771         assert(m.prefix().first == s);
772         assert(m.prefix().second == m[0].first);
773         assert(!m.suffix().matched);
774         assert(m.suffix().first == m[0].second);
775         assert(m.suffix().second == s+2);
776         assert(m.length(0) == 2);
777         assert(m.position(0) == 0);
778         assert(m.str(0) == L"ab");
779     }
780     {
781         std::wcmatch m;
782         const wchar_t s[] = L"ab";
783         assert(!std::regex_search(s, m, std::wregex(L"ba", std::regex_constants::basic)));
784         assert(m.size() == 0);
785         assert(m.empty());
786     }
787     {
788         std::wcmatch m;
789         const wchar_t s[] = L"aab";
790         assert(std::regex_search(s, m, std::wregex(L"ab", std::regex_constants::basic)));
791         assert(m.size() == 1);
792         assert(m.prefix().matched);
793         assert(m.prefix().first == s);
794         assert(m.prefix().second == m[0].first);
795         assert(!m.suffix().matched);
796         assert(m.suffix().first == m[0].second);
797         assert(m.suffix().second == s+3);
798         assert(m.length(0) == 2);
799         assert(m.position(0) == 1);
800         assert(m.str(0) == L"ab");
801     }
802     {
803         std::wcmatch m;
804         const wchar_t s[] = L"aab";
805         assert(!std::regex_search(s, m, std::wregex(L"ab", std::regex_constants::basic),
806                                             std::regex_constants::match_continuous));
807         assert(m.size() == 0);
808     }
809     {
810         std::wcmatch m;
811         const wchar_t s[] = L"abcd";
812         assert(std::regex_search(s, m, std::wregex(L"bc", std::regex_constants::basic)));
813         assert(m.size() == 1);
814         assert(m.prefix().matched);
815         assert(m.prefix().first == s);
816         assert(m.prefix().second == m[0].first);
817         assert(m.suffix().matched);
818         assert(m.suffix().first == m[0].second);
819         assert(m.suffix().second == s+4);
820         assert(m.length(0) == 2);
821         assert(m.position(0) == 1);
822         assert(m.str(0) == L"bc");
823     }
824     {
825         std::wcmatch m;
826         const wchar_t s[] = L"abbc";
827         assert(std::regex_search(s, m, std::wregex(L"ab*c", std::regex_constants::basic)));
828         assert(m.size() == 1);
829         assert(!m.prefix().matched);
830         assert(m.prefix().first == s);
831         assert(m.prefix().second == m[0].first);
832         assert(!m.suffix().matched);
833         assert(m.suffix().first == m[0].second);
834         assert(m.suffix().second == s+4);
835         assert(m.length(0) == 4);
836         assert(m.position(0) == 0);
837         assert(m.str(0) == s);
838     }
839     {
840         std::wcmatch m;
841         const wchar_t s[] = L"ababc";
842         assert(std::regex_search(s, m, std::wregex(L"\\(ab\\)*c", std::regex_constants::basic)));
843         assert(m.size() == 2);
844         assert(!m.prefix().matched);
845         assert(m.prefix().first == s);
846         assert(m.prefix().second == m[0].first);
847         assert(!m.suffix().matched);
848         assert(m.suffix().first == m[0].second);
849         assert(m.suffix().second == s+5);
850         assert(m.length(0) == 5);
851         assert(m.position(0) == 0);
852         assert(m.str(0) == s);
853         assert(m.length(1) == 2);
854         assert(m.position(1) == 2);
855         assert(m.str(1) == L"ab");
856     }
857     {
858         std::wcmatch m;
859         const wchar_t s[] = L"abcdefghijk";
860         assert(std::regex_search(s, m, std::wregex(L"cd\\(\\(e\\)fg\\)hi",
861                                  std::regex_constants::basic)));
862         assert(m.size() == 3);
863         assert(m.prefix().matched);
864         assert(m.prefix().first == s);
865         assert(m.prefix().second == m[0].first);
866         assert(m.suffix().matched);
867         assert(m.suffix().first == m[0].second);
868         assert(m.suffix().second == s+std::regex_traits<wchar_t>::length(s));
869         assert(m.length(0) == 7);
870         assert(m.position(0) == 2);
871         assert(m.str(0) == L"cdefghi");
872         assert(m.length(1) == 3);
873         assert(m.position(1) == 4);
874         assert(m.str(1) == L"efg");
875         assert(m.length(2) == 1);
876         assert(m.position(2) == 4);
877         assert(m.str(2) == L"e");
878     }
879     {
880         std::wcmatch m;
881         const wchar_t s[] = L"abc";
882         assert(std::regex_search(s, m, std::wregex(L"^abc", std::regex_constants::basic)));
883         assert(m.size() == 1);
884         assert(!m.prefix().matched);
885         assert(m.prefix().first == s);
886         assert(m.prefix().second == m[0].first);
887         assert(!m.suffix().matched);
888         assert(m.suffix().first == m[0].second);
889         assert(m.suffix().second == s+3);
890         assert(m.length(0) == 3);
891         assert(m.position(0) == 0);
892         assert(m.str(0) == s);
893     }
894     {
895         std::wcmatch m;
896         const wchar_t s[] = L"abcd";
897         assert(std::regex_search(s, m, std::wregex(L"^abc", std::regex_constants::basic)));
898         assert(m.size() == 1);
899         assert(!m.prefix().matched);
900         assert(m.prefix().first == s);
901         assert(m.prefix().second == m[0].first);
902         assert(m.suffix().matched);
903         assert(m.suffix().first == m[0].second);
904         assert(m.suffix().second == s+4);
905         assert(m.length(0) == 3);
906         assert(m.position(0) == 0);
907         assert(m.str(0) == L"abc");
908     }
909     {
910         std::wcmatch m;
911         const wchar_t s[] = L"aabc";
912         assert(!std::regex_search(s, m, std::wregex(L"^abc", std::regex_constants::basic)));
913         assert(m.size() == 0);
914     }
915     {
916         std::wcmatch m;
917         const wchar_t s[] = L"abc";
918         assert(std::regex_search(s, m, std::wregex(L"abc$", std::regex_constants::basic)));
919         assert(m.size() == 1);
920         assert(!m.prefix().matched);
921         assert(m.prefix().first == s);
922         assert(m.prefix().second == m[0].first);
923         assert(!m.suffix().matched);
924         assert(m.suffix().first == m[0].second);
925         assert(m.suffix().second == s+3);
926         assert(m.length(0) == 3);
927         assert(m.position(0) == 0);
928         assert(m.str(0) == s);
929     }
930     {
931         std::wcmatch m;
932         const wchar_t s[] = L"efabc";
933         assert(std::regex_search(s, m, std::wregex(L"abc$", std::regex_constants::basic)));
934         assert(m.size() == 1);
935         assert(m.prefix().matched);
936         assert(m.prefix().first == s);
937         assert(m.prefix().second == m[0].first);
938         assert(!m.suffix().matched);
939         assert(m.suffix().first == m[0].second);
940         assert(m.suffix().second == s+5);
941         assert(m.length(0) == 3);
942         assert(m.position(0) == 2);
943         assert(m.str(0) == s+2);
944     }
945     {
946         std::wcmatch m;
947         const wchar_t s[] = L"efabcg";
948         assert(!std::regex_search(s, m, std::wregex(L"abc$", std::regex_constants::basic)));
949         assert(m.size() == 0);
950     }
951     {
952         std::wcmatch m;
953         const wchar_t s[] = L"abc";
954         assert(std::regex_search(s, m, std::wregex(L"a.c", std::regex_constants::basic)));
955         assert(m.size() == 1);
956         assert(!m.prefix().matched);
957         assert(m.prefix().first == s);
958         assert(m.prefix().second == m[0].first);
959         assert(!m.suffix().matched);
960         assert(m.suffix().first == m[0].second);
961         assert(m.suffix().second == s+3);
962         assert(m.length(0) == 3);
963         assert(m.position(0) == 0);
964         assert(m.str(0) == s);
965     }
966     {
967         std::wcmatch m;
968         const wchar_t s[] = L"acc";
969         assert(std::regex_search(s, m, std::wregex(L"a.c", std::regex_constants::basic)));
970         assert(m.size() == 1);
971         assert(!m.prefix().matched);
972         assert(m.prefix().first == s);
973         assert(m.prefix().second == m[0].first);
974         assert(!m.suffix().matched);
975         assert(m.suffix().first == m[0].second);
976         assert(m.suffix().second == s+3);
977         assert(m.length(0) == 3);
978         assert(m.position(0) == 0);
979         assert(m.str(0) == s);
980     }
981     {
982         std::wcmatch m;
983         const wchar_t s[] = L"acc";
984         assert(std::regex_search(s, m, std::wregex(L"a.c", std::regex_constants::basic)));
985         assert(m.size() == 1);
986         assert(!m.prefix().matched);
987         assert(m.prefix().first == s);
988         assert(m.prefix().second == m[0].first);
989         assert(!m.suffix().matched);
990         assert(m.suffix().first == m[0].second);
991         assert(m.suffix().second == s+3);
992         assert(m.length(0) == 3);
993         assert(m.position(0) == 0);
994         assert(m.str(0) == s);
995     }
996     {
997         std::wcmatch m;
998         const wchar_t s[] = L"abcdef";
999         assert(std::regex_search(s, m, std::wregex(L"\\(.*\\).*", std::regex_constants::basic)));
1000         assert(m.size() == 2);
1001         assert(!m.prefix().matched);
1002         assert(m.prefix().first == s);
1003         assert(m.prefix().second == m[0].first);
1004         assert(!m.suffix().matched);
1005         assert(m.suffix().first == m[0].second);
1006         assert(m.suffix().second == s+6);
1007         assert(m.length(0) == 6);
1008         assert(m.position(0) == 0);
1009         assert(m.str(0) == s);
1010         assert(m.length(1) == 6);
1011         assert(m.position(1) == 0);
1012         assert(m.str(1) == s);
1013     }
1014     {
1015         std::wcmatch m;
1016         const wchar_t s[] = L"bc";
1017         assert(std::regex_search(s, m, std::wregex(L"\\(a*\\)*", std::regex_constants::basic)));
1018         assert(m.size() == 2);
1019         assert(!m.prefix().matched);
1020         assert(m.prefix().first == s);
1021         assert(m.prefix().second == m[0].first);
1022         assert(m.suffix().matched);
1023         assert(m.suffix().first == m[0].second);
1024         assert(m.suffix().second == s+2);
1025         assert(m.length(0) == 0);
1026         assert(m.position(0) == 0);
1027         assert(m.str(0) == L"");
1028         assert(m.length(1) == 0);
1029         assert(m.position(1) == 0);
1030         assert(m.str(1) == L"");
1031     }
1032     {
1033         std::wcmatch m;
1034         const wchar_t s[] = L"abbc";
1035         assert(!std::regex_search(s, m, std::wregex(L"ab\\{3,5\\}c", std::regex_constants::basic)));
1036         assert(m.size() == 0);
1037     }
1038     {
1039         std::wcmatch m;
1040         const wchar_t s[] = L"abbbc";
1041         assert(std::regex_search(s, m, std::wregex(L"ab\\{3,5\\}c", std::regex_constants::basic)));
1042         assert(m.size() == 1);
1043         assert(!m.prefix().matched);
1044         assert(m.prefix().first == s);
1045         assert(m.prefix().second == m[0].first);
1046         assert(!m.suffix().matched);
1047         assert(m.suffix().first == m[0].second);
1048         assert(m.suffix().second == m[0].second);
1049         assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<wchar_t>::length(s));
1050         assert(m.position(0) == 0);
1051         assert(m.str(0) == s);
1052     }
1053     {
1054         std::wcmatch m;
1055         const wchar_t s[] = L"abbbbc";
1056         assert(std::regex_search(s, m, std::wregex(L"ab\\{3,5\\}c", std::regex_constants::basic)));
1057         assert(m.size() == 1);
1058         assert(!m.prefix().matched);
1059         assert(m.prefix().first == s);
1060         assert(m.prefix().second == m[0].first);
1061         assert(!m.suffix().matched);
1062         assert(m.suffix().first == m[0].second);
1063         assert(m.suffix().second == m[0].second);
1064         assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<wchar_t>::length(s));
1065         assert(m.position(0) == 0);
1066         assert(m.str(0) == s);
1067     }
1068     {
1069         std::wcmatch m;
1070         const wchar_t s[] = L"abbbbbc";
1071         assert(std::regex_search(s, m, std::wregex(L"ab\\{3,5\\}c", std::regex_constants::basic)));
1072         assert(m.size() == 1);
1073         assert(!m.prefix().matched);
1074         assert(m.prefix().first == s);
1075         assert(m.prefix().second == m[0].first);
1076         assert(!m.suffix().matched);
1077         assert(m.suffix().first == m[0].second);
1078         assert(m.suffix().second == m[0].second);
1079         assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<wchar_t>::length(s));
1080         assert(m.position(0) == 0);
1081         assert(m.str(0) == s);
1082     }
1083     {
1084         std::wcmatch m;
1085         const wchar_t s[] = L"adefc";
1086         assert(!std::regex_search(s, m, std::wregex(L"ab\\{3,5\\}c", std::regex_constants::basic)));
1087         assert(m.size() == 0);
1088     }
1089     {
1090         std::wcmatch m;
1091         const wchar_t s[] = L"abbbbbbc";
1092         assert(!std::regex_search(s, m, std::wregex(L"ab\\{3,5\\}c", std::regex_constants::basic)));
1093         assert(m.size() == 0);
1094     }
1095     {
1096         std::wcmatch m;
1097         const wchar_t s[] = L"adec";
1098         assert(!std::regex_search(s, m, std::wregex(L"a.\\{3,5\\}c", std::regex_constants::basic)));
1099         assert(m.size() == 0);
1100     }
1101     {
1102         std::wcmatch m;
1103         const wchar_t s[] = L"adefc";
1104         assert(std::regex_search(s, m, std::wregex(L"a.\\{3,5\\}c", std::regex_constants::basic)));
1105         assert(m.size() == 1);
1106         assert(!m.prefix().matched);
1107         assert(m.prefix().first == s);
1108         assert(m.prefix().second == m[0].first);
1109         assert(!m.suffix().matched);
1110         assert(m.suffix().first == m[0].second);
1111         assert(m.suffix().second == m[0].second);
1112         assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<wchar_t>::length(s));
1113         assert(m.position(0) == 0);
1114         assert(m.str(0) == s);
1115     }
1116     {
1117         std::wcmatch m;
1118         const wchar_t s[] = L"adefgc";
1119         assert(std::regex_search(s, m, std::wregex(L"a.\\{3,5\\}c", std::regex_constants::basic)));
1120         assert(m.size() == 1);
1121         assert(!m.prefix().matched);
1122         assert(m.prefix().first == s);
1123         assert(m.prefix().second == m[0].first);
1124         assert(!m.suffix().matched);
1125         assert(m.suffix().first == m[0].second);
1126         assert(m.suffix().second == m[0].second);
1127         assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<wchar_t>::length(s));
1128         assert(m.position(0) == 0);
1129         assert(m.str(0) == s);
1130     }
1131     {
1132         std::wcmatch m;
1133         const wchar_t s[] = L"adefghc";
1134         assert(std::regex_search(s, m, std::wregex(L"a.\\{3,5\\}c", std::regex_constants::basic)));
1135         assert(m.size() == 1);
1136         assert(!m.prefix().matched);
1137         assert(m.prefix().first == s);
1138         assert(m.prefix().second == m[0].first);
1139         assert(!m.suffix().matched);
1140         assert(m.suffix().first == m[0].second);
1141         assert(m.suffix().second == m[0].second);
1142         assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<wchar_t>::length(s));
1143         assert(m.position(0) == 0);
1144         assert(m.str(0) == s);
1145     }
1146     {
1147         std::wcmatch m;
1148         const wchar_t s[] = L"adefghic";
1149         assert(!std::regex_search(s, m, std::wregex(L"a.\\{3,5\\}c", std::regex_constants::basic)));
1150         assert(m.size() == 0);
1151     }
1152     {
1153         std::wcmatch m;
1154         const wchar_t s[] = L"-ab,ab-";
1155         assert(std::regex_search(s, m, std::wregex(L"-\\(.*\\),\\1-", std::regex_constants::basic)));
1156         assert(m.size() == 2);
1157         assert(!m.prefix().matched);
1158         assert(m.prefix().first == s);
1159         assert(m.prefix().second == m[0].first);
1160         assert(!m.suffix().matched);
1161         assert(m.suffix().first == m[0].second);
1162         assert(m.suffix().second == m[0].second);
1163         assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<wchar_t>::length(s));
1164         assert(m.position(0) == 0);
1165         assert(m.str(0) == s);
1166         assert(m.length(1) == 2);
1167         assert(m.position(1) == 1);
1168         assert(m.str(1) == L"ab");
1169     }
1170     {
1171         std::wcmatch m;
1172         const wchar_t s[] = L"ababbabb";
1173         assert(std::regex_search(s, m, std::wregex(L"^\\(ab*\\)*\\1$", std::regex_constants::basic)));
1174         assert(m.size() == 2);
1175         assert(!m.prefix().matched);
1176         assert(m.prefix().first == s);
1177         assert(m.prefix().second == m[0].first);
1178         assert(!m.suffix().matched);
1179         assert(m.suffix().first == m[0].second);
1180         assert(m.suffix().second == m[0].second);
1181         assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<wchar_t>::length(s));
1182         assert(m.position(0) == 0);
1183         assert(m.str(0) == s);
1184         assert(m.length(1) == 3);
1185         assert(m.position(1) == 2);
1186         assert(m.str(1) == L"abb");
1187     }
1188     {
1189         std::wcmatch m;
1190         const wchar_t s[] = L"ababbab";
1191         assert(!std::regex_search(s, m, std::wregex(L"^\\(ab*\\)*\\1$", std::regex_constants::basic)));
1192         assert(m.size() == 0);
1193     }
1194     {
1195         std::wcmatch m;
1196         const wchar_t s[] = L"aBAbbAbB";
1197         assert(std::regex_search(s, m, std::wregex(L"^\\(Ab*\\)*\\1$",
1198                    std::regex_constants::basic | std::regex_constants::icase)));
1199         assert(m.size() == 2);
1200         assert(!m.prefix().matched);
1201         assert(m.prefix().first == s);
1202         assert(m.prefix().second == m[0].first);
1203         assert(!m.suffix().matched);
1204         assert(m.suffix().first == m[0].second);
1205         assert(m.suffix().second == m[0].second);
1206         assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<wchar_t>::length(s));
1207         assert(m.position(0) == 0);
1208         assert(m.str(0) == s);
1209         assert(m.length(1) == 3);
1210         assert(m.position(1) == 2);
1211         assert(m.str(1) == L"Abb");
1212     }
1213     {
1214         std::wcmatch m;
1215         const wchar_t s[] = L"aBAbbAbB";
1216         assert(!std::regex_search(s, m, std::wregex(L"^\\(Ab*\\)*\\1$",
1217                                                  std::regex_constants::basic)));
1218         assert(m.size() == 0);
1219     }
1220     {
1221         std::wcmatch m;
1222         const wchar_t s[] = L"a";
1223         assert(std::regex_search(s, m, std::wregex(L"^[a]$",
1224                                                  std::regex_constants::basic)));
1225         assert(m.size() == 1);
1226         assert(!m.prefix().matched);
1227         assert(m.prefix().first == s);
1228         assert(m.prefix().second == m[0].first);
1229         assert(!m.suffix().matched);
1230         assert(m.suffix().first == m[0].second);
1231         assert(m.suffix().second == m[0].second);
1232         assert(m.length(0) == 1);
1233         assert(m.position(0) == 0);
1234         assert(m.str(0) == L"a");
1235     }
1236     {
1237         std::wcmatch m;
1238         const wchar_t s[] = L"a";
1239         assert(std::regex_search(s, m, std::wregex(L"^[ab]$",
1240                                                  std::regex_constants::basic)));
1241         assert(m.size() == 1);
1242         assert(!m.prefix().matched);
1243         assert(m.prefix().first == s);
1244         assert(m.prefix().second == m[0].first);
1245         assert(!m.suffix().matched);
1246         assert(m.suffix().first == m[0].second);
1247         assert(m.suffix().second == m[0].second);
1248         assert(m.length(0) == 1);
1249         assert(m.position(0) == 0);
1250         assert(m.str(0) == L"a");
1251     }
1252     {
1253         std::wcmatch m;
1254         const wchar_t s[] = L"c";
1255         assert(std::regex_search(s, m, std::wregex(L"^[a-f]$",
1256                                                  std::regex_constants::basic)));
1257         assert(m.size() == 1);
1258         assert(!m.prefix().matched);
1259         assert(m.prefix().first == s);
1260         assert(m.prefix().second == m[0].first);
1261         assert(!m.suffix().matched);
1262         assert(m.suffix().first == m[0].second);
1263         assert(m.suffix().second == m[0].second);
1264         assert(m.length(0) == 1);
1265         assert(m.position(0) == 0);
1266         assert(m.str(0) == s);
1267     }
1268     {
1269         std::wcmatch m;
1270         const wchar_t s[] = L"g";
1271         assert(!std::regex_search(s, m, std::wregex(L"^[a-f]$",
1272                                                  std::regex_constants::basic)));
1273         assert(m.size() == 0);
1274     }
1275     {
1276         std::wcmatch m;
1277         const wchar_t s[] = L"Iraqi";
1278         assert(std::regex_search(s, m, std::wregex(L"q[^u]",
1279                                                  std::regex_constants::basic)));
1280         assert(m.size() == 1);
1281         assert(m.prefix().matched);
1282         assert(m.prefix().first == s);
1283         assert(m.prefix().second == m[0].first);
1284         assert(!m.suffix().matched);
1285         assert(m.suffix().first == m[0].second);
1286         assert(m.suffix().second == m[0].second);
1287         assert(m.length(0) == 2);
1288         assert(m.position(0) == 3);
1289         assert(m.str(0) == L"qi");
1290     }
1291     {
1292         std::wcmatch m;
1293         const wchar_t s[] = L"Iraq";
1294         assert(!std::regex_search(s, m, std::wregex(L"q[^u]",
1295                                                  std::regex_constants::basic)));
1296         assert(m.size() == 0);
1297     }
1298     {
1299         std::wcmatch m;
1300         const wchar_t s[] = L"AmB";
1301         assert(std::regex_search(s, m, std::wregex(L"A[[:lower:]]B",
1302                                                  std::regex_constants::basic)));
1303         assert(m.size() == 1);
1304         assert(!m.prefix().matched);
1305         assert(m.prefix().first == s);
1306         assert(m.prefix().second == m[0].first);
1307         assert(!m.suffix().matched);
1308         assert(m.suffix().first == m[0].second);
1309         assert(m.suffix().second == m[0].second);
1310         assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<wchar_t>::length(s));
1311         assert(m.position(0) == 0);
1312         assert(m.str(0) == s);
1313     }
1314     {
1315         std::wcmatch m;
1316         const wchar_t s[] = L"AMB";
1317         assert(!std::regex_search(s, m, std::wregex(L"A[[:lower:]]B",
1318                                                  std::regex_constants::basic)));
1319         assert(m.size() == 0);
1320     }
1321     {
1322         std::wcmatch m;
1323         const wchar_t s[] = L"AMB";
1324         assert(std::regex_search(s, m, std::wregex(L"A[^[:lower:]]B",
1325                                                  std::regex_constants::basic)));
1326         assert(m.size() == 1);
1327         assert(!m.prefix().matched);
1328         assert(m.prefix().first == s);
1329         assert(m.prefix().second == m[0].first);
1330         assert(!m.suffix().matched);
1331         assert(m.suffix().first == m[0].second);
1332         assert(m.suffix().second == m[0].second);
1333         assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<wchar_t>::length(s));
1334         assert(m.position(0) == 0);
1335         assert(m.str(0) == s);
1336     }
1337     {
1338         std::wcmatch m;
1339         const wchar_t s[] = L"AmB";
1340         assert(!std::regex_search(s, m, std::wregex(L"A[^[:lower:]]B",
1341                                                  std::regex_constants::basic)));
1342         assert(m.size() == 0);
1343     }
1344     {
1345         std::wcmatch m;
1346         const wchar_t s[] = L"A5B";
1347         assert(!std::regex_search(s, m, std::wregex(L"A[^[:lower:]0-9]B",
1348                                                  std::regex_constants::basic)));
1349         assert(m.size() == 0);
1350     }
1351     {
1352         std::wcmatch m;
1353         const wchar_t s[] = L"A?B";
1354         assert(std::regex_search(s, m, std::wregex(L"A[^[:lower:]0-9]B",
1355                                                  std::regex_constants::basic)));
1356         assert(m.size() == 1);
1357         assert(!m.prefix().matched);
1358         assert(m.prefix().first == s);
1359         assert(m.prefix().second == m[0].first);
1360         assert(!m.suffix().matched);
1361         assert(m.suffix().first == m[0].second);
1362         assert(m.suffix().second == m[0].second);
1363         assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<wchar_t>::length(s));
1364         assert(m.position(0) == 0);
1365         assert(m.str(0) == s);
1366     }
1367     {
1368         std::wcmatch m;
1369         const wchar_t s[] = L"-";
1370         assert(std::regex_search(s, m, std::wregex(L"[a[.hyphen.]z]",
1371                                                  std::regex_constants::basic)));
1372         assert(m.size() == 1);
1373         assert(!m.prefix().matched);
1374         assert(m.prefix().first == s);
1375         assert(m.prefix().second == m[0].first);
1376         assert(!m.suffix().matched);
1377         assert(m.suffix().first == m[0].second);
1378         assert(m.suffix().second == m[0].second);
1379         assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<wchar_t>::length(s));
1380         assert(m.position(0) == 0);
1381         assert(m.str(0) == s);
1382     }
1383     {
1384         std::wcmatch m;
1385         const wchar_t s[] = L"z";
1386         assert(std::regex_search(s, m, std::wregex(L"[a[.hyphen.]z]",
1387                                                  std::regex_constants::basic)));
1388         assert(m.size() == 1);
1389         assert(!m.prefix().matched);
1390         assert(m.prefix().first == s);
1391         assert(m.prefix().second == m[0].first);
1392         assert(!m.suffix().matched);
1393         assert(m.suffix().first == m[0].second);
1394         assert(m.suffix().second == m[0].second);
1395         assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<wchar_t>::length(s));
1396         assert(m.position(0) == 0);
1397         assert(m.str(0) == s);
1398     }
1399     {
1400         std::wcmatch m;
1401         const wchar_t s[] = L"m";
1402         assert(!std::regex_search(s, m, std::wregex(L"[a[.hyphen.]z]",
1403                                                  std::regex_constants::basic)));
1404         assert(m.size() == 0);
1405     }
1406     {
1407         std::wcmatch m;
1408         const wchar_t s[] = L"01a45cef9";
1409         assert(std::regex_search(s, m, std::wregex(L"[ace1-9]*",
1410                                                  std::regex_constants::basic)));
1411         assert(m.size() == 1);
1412         assert(!m.prefix().matched);
1413         assert(m.prefix().first == s);
1414         assert(m.prefix().second == m[0].first);
1415         assert(m.suffix().matched);
1416         assert(m.suffix().first == m[0].second);
1417         assert(m.suffix().second == s + std::char_traits<wchar_t>::length(s));
1418         assert(m.length(0) == 0);
1419         assert(m.position(0) == 0);
1420         assert(m.str(0) == L"");
1421     }
1422     {
1423         std::wcmatch m;
1424         const wchar_t s[] = L"01a45cef9";
1425         assert(std::regex_search(s, m, std::wregex(L"[ace1-9]\\{1,\\}",
1426                                                  std::regex_constants::basic)));
1427         assert(m.size() == 1);
1428         assert(m.prefix().matched);
1429         assert(m.prefix().first == s);
1430         assert(m.prefix().second == m[0].first);
1431         assert(m.suffix().matched);
1432         assert(m.suffix().first == m[0].second);
1433         assert(m.suffix().second == s + std::char_traits<wchar_t>::length(s));
1434         assert(m.length(0) == 6);
1435         assert(m.position(0) == 1);
1436         assert(m.str(0) == L"1a45ce");
1437     }
1438     {
1439         const wchar_t r[] = L"^[-+]\\{0,1\\}[0-9]\\{1,\\}[CF]$";
1440         std::ptrdiff_t sr = std::char_traits<wchar_t>::length(r);
1441         typedef forward_iterator<const wchar_t*> FI;
1442         typedef bidirectional_iterator<const wchar_t*> BI;
1443         std::wregex regex(FI(r), FI(r+sr), std::regex_constants::basic);
1444         std::match_results<BI> m;
1445         const wchar_t s[] = L"-40C";
1446         std::ptrdiff_t ss = std::char_traits<wchar_t>::length(s);
1447         assert(std::regex_search(BI(s), BI(s+ss), m, regex));
1448         assert(m.size() == 1);
1449         assert(!m.prefix().matched);
1450         assert(m.prefix().first == BI(s));
1451         assert(m.prefix().second == m[0].first);
1452         assert(!m.suffix().matched);
1453         assert(m.suffix().first == m[0].second);
1454         assert(m.suffix().second == m[0].second);
1455         assert(m.length(0) == 4);
1456         assert(m.position(0) == 0);
1457         assert(m.str(0) == s);
1458     }
1459     { // LWG 2273
1460         std::regex re("Foo|FooBar");
1461         std::cmatch m;
1462         {
1463             assert(std::regex_search("FooBar", m, re));
1464             assert(m.size() == 1);
1465             assert(m[0] == "Foo");
1466         }
1467         {
1468             assert(std::regex_search("Foo", m, re));
1469             assert(m.size() == 1);
1470             assert(m[0] == "Foo");
1471         }
1472         {
1473             assert(std::regex_search("FooBarBaz", m, re));
1474             assert(m.size() == 1);
1475             assert(m[0] == "Foo");
1476         }
1477         {
1478             assert(std::regex_search("FooBa", m, re));
1479             assert(m.size() == 1);
1480             assert(m[0] == "Foo");
1481         }
1482     }
1483 
1484   return 0;
1485 }
1486