clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name RedundantControlFlowCheck.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -mframe-pointer=none -relaxed-aliasing -fmath-errno -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -ffunction-sections -fdata-sections -fcoverage-compilation-dir=/build/llvm-toolchain-snapshot-15~++20220211101351+43a1756a5d53/build-llvm/tools/clang/stage2-bins -resource-dir /usr/lib/llvm-15/lib/clang/15.0.0 -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I tools/clang/tools/extra/clang-tidy/readability -I /build/llvm-toolchain-snapshot-15~++20220211101351+43a1756a5d53/clang-tools-extra/clang-tidy/readability -I tools/clang/tools/extra/clang-tidy -I /build/llvm-toolchain-snapshot-15~++20220211101351+43a1756a5d53/clang/include -I tools/clang/include -I include -I /build/llvm-toolchain-snapshot-15~++20220211101351+43a1756a5d53/llvm/include -D _FORTIFY_SOURCE=2 -D NDEBUG -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/x86_64-linux-gnu/c++/10 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/backward -internal-isystem /usr/lib/llvm-15/lib/clang/15.0.0/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -fmacro-prefix-map=/build/llvm-toolchain-snapshot-15~++20220211101351+43a1756a5d53/build-llvm/tools/clang/stage2-bins=build-llvm/tools/clang/stage2-bins -fmacro-prefix-map=/build/llvm-toolchain-snapshot-15~++20220211101351+43a1756a5d53/= -fcoverage-prefix-map=/build/llvm-toolchain-snapshot-15~++20220211101351+43a1756a5d53/build-llvm/tools/clang/stage2-bins=build-llvm/tools/clang/stage2-bins -fcoverage-prefix-map=/build/llvm-toolchain-snapshot-15~++20220211101351+43a1756a5d53/= -O3 -Wno-unused-command-line-argument -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-class-memaccess -Wno-redundant-move -Wno-pessimizing-move -Wno-noexcept-type -Wno-comment -std=c++14 -fdeprecated-macro -fdebug-compilation-dir=/build/llvm-toolchain-snapshot-15~++20220211101351+43a1756a5d53/build-llvm/tools/clang/stage2-bins -fdebug-prefix-map=/build/llvm-toolchain-snapshot-15~++20220211101351+43a1756a5d53/build-llvm/tools/clang/stage2-bins=build-llvm/tools/clang/stage2-bins -fdebug-prefix-map=/build/llvm-toolchain-snapshot-15~++20220211101351+43a1756a5d53/= -ferror-limit 19 -fvisibility-inlines-hidden -stack-protector 2 -fgnuc-version=4.2.1 -fcolor-diagnostics -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/scan-build-2022-02-12-012820-35430-1 -x c++ /build/llvm-toolchain-snapshot-15~++20220211101351+43a1756a5d53/clang-tools-extra/clang-tidy/readability/RedundantControlFlowCheck.cpp
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60 | #ifndef _STL_ITERATOR_H |
61 | #define _STL_ITERATOR_H 1 |
62 | |
63 | #include <bits/cpp_type_traits.h> |
64 | #include <ext/type_traits.h> |
65 | #include <bits/move.h> |
66 | #include <bits/ptr_traits.h> |
67 | |
68 | #if __cplusplus >= 201103L |
69 | # include <type_traits> |
70 | #endif |
71 | |
72 | #if __cplusplus > 201703L |
73 | # define __cpp_lib_array_constexpr 201811L |
74 | # define __cpp_lib_constexpr_iterator 201811L |
75 | #elif __cplusplus == 201703L |
76 | # define __cpp_lib_array_constexpr 201803L |
77 | #endif |
78 | |
79 | #if __cplusplus > 201703L |
80 | # include <compare> |
81 | # include <new> |
82 | # include <bits/iterator_concepts.h> |
83 | #endif |
84 | |
85 | namespace std _GLIBCXX_VISIBILITY(default) |
86 | { |
87 | _GLIBCXX_BEGIN_NAMESPACE_VERSION |
88 | |
89 | |
90 | |
91 | |
92 | |
93 | |
94 | #if __cplusplus > 201703L && __cpp_lib_concepts |
95 | namespace __detail |
96 | { |
97 | |
98 | |
99 | template<typename _Cat, typename _Limit, typename _Otherwise = _Cat> |
100 | using __clamp_iter_cat |
101 | = conditional_t<derived_from<_Cat, _Limit>, _Limit, _Otherwise>; |
102 | } |
103 | #endif |
104 | |
105 | |
106 | |
107 | |
108 | |
109 | |
110 | |
111 | |
112 | |
113 | |
114 | |
115 | |
116 | |
117 | |
118 | |
119 | |
120 | |
121 | |
122 | |
123 | |
124 | template<typename _Iterator> |
125 | class reverse_iterator |
126 | : public iterator<typename iterator_traits<_Iterator>::iterator_category, |
127 | typename iterator_traits<_Iterator>::value_type, |
128 | typename iterator_traits<_Iterator>::difference_type, |
129 | typename iterator_traits<_Iterator>::pointer, |
130 | typename iterator_traits<_Iterator>::reference> |
131 | { |
132 | protected: |
133 | _Iterator current; |
134 | |
135 | typedef iterator_traits<_Iterator> __traits_type; |
136 | |
137 | public: |
138 | typedef _Iterator iterator_type; |
139 | typedef typename __traits_type::difference_type difference_type; |
140 | typedef typename __traits_type::pointer pointer; |
141 | typedef typename __traits_type::reference reference; |
142 | |
143 | #if __cplusplus > 201703L && __cpp_lib_concepts |
144 | using iterator_concept |
145 | = conditional_t<random_access_iterator<_Iterator>, |
146 | random_access_iterator_tag, |
147 | bidirectional_iterator_tag>; |
148 | using iterator_category |
149 | = __detail::__clamp_iter_cat<typename __traits_type::iterator_category, |
150 | random_access_iterator_tag>; |
151 | #endif |
152 | |
153 | |
154 | |
155 | |
156 | |
157 | |
158 | |
159 | |
160 | _GLIBCXX17_CONSTEXPR |
161 | reverse_iterator() : current() { } |
162 | |
163 | |
164 | |
165 | |
166 | explicit _GLIBCXX17_CONSTEXPR |
167 | reverse_iterator(iterator_type __x) : current(__x) { } |
168 | |
169 | |
170 | |
171 | |
172 | _GLIBCXX17_CONSTEXPR |
173 | reverse_iterator(const reverse_iterator& __x) |
174 | : current(__x.current) { } |
175 | |
176 | #if __cplusplus >= 201103L |
177 | reverse_iterator& operator=(const reverse_iterator&) = default; |
178 | #endif |
179 | |
180 | |
181 | |
182 | |
183 | |
184 | template<typename _Iter> |
185 | _GLIBCXX17_CONSTEXPR |
186 | reverse_iterator(const reverse_iterator<_Iter>& __x) |
187 | : current(__x.base()) { } |
188 | |
189 | |
190 | |
191 | |
192 | _GLIBCXX17_CONSTEXPR iterator_type |
193 | base() const |
194 | { return current; } |
195 | |
196 | |
197 | |
198 | |
199 | |
200 | |
201 | |
202 | |
203 | |
204 | |
205 | |
206 | _GLIBCXX17_CONSTEXPR reference |
207 | operator*() const |
208 | { |
209 | _Iterator __tmp = current; |
210 | return *--__tmp; |
211 | } |
212 | |
213 | |
214 | |
215 | |
216 | |
217 | |
218 | _GLIBCXX17_CONSTEXPR pointer |
219 | operator->() const |
220 | #if __cplusplus > 201703L && __cpp_concepts >= 201907L |
221 | requires is_pointer_v<_Iterator> |
222 | || requires(const _Iterator __i) { __i.operator->(); } |
223 | #endif |
224 | { |
225 | |
226 | |
227 | _Iterator __tmp = current; |
228 | --__tmp; |
229 | return _S_to_pointer(__tmp); |
230 | } |
231 | |
232 | |
233 | |
234 | |
235 | |
236 | |
237 | _GLIBCXX17_CONSTEXPR reverse_iterator& |
238 | operator++() |
239 | { |
240 | --current; |
241 | return *this; |
242 | } |
243 | |
244 | |
245 | |
246 | |
247 | |
248 | |
249 | _GLIBCXX17_CONSTEXPR reverse_iterator |
250 | operator++(int) |
251 | { |
252 | reverse_iterator __tmp = *this; |
253 | --current; |
254 | return __tmp; |
255 | } |
256 | |
257 | |
258 | |
259 | |
260 | |
261 | |
262 | _GLIBCXX17_CONSTEXPR reverse_iterator& |
263 | operator--() |
264 | { |
265 | ++current; |
266 | return *this; |
267 | } |
268 | |
269 | |
270 | |
271 | |
272 | |
273 | |
274 | _GLIBCXX17_CONSTEXPR reverse_iterator |
275 | operator--(int) |
276 | { |
277 | reverse_iterator __tmp = *this; |
278 | ++current; |
279 | return __tmp; |
280 | } |
281 | |
282 | |
283 | |
284 | |
285 | |
286 | |
287 | _GLIBCXX17_CONSTEXPR reverse_iterator |
288 | operator+(difference_type __n) const |
289 | { return reverse_iterator(current - __n); } |
290 | |
291 | |
292 | |
293 | |
294 | |
295 | |
296 | |
297 | _GLIBCXX17_CONSTEXPR reverse_iterator& |
298 | operator+=(difference_type __n) |
299 | { |
300 | current -= __n; |
301 | return *this; |
302 | } |
303 | |
304 | |
305 | |
306 | |
307 | |
308 | |
309 | _GLIBCXX17_CONSTEXPR reverse_iterator |
310 | operator-(difference_type __n) const |
311 | { return reverse_iterator(current + __n); } |
312 | |
313 | |
314 | |
315 | |
316 | |
317 | |
318 | |
319 | _GLIBCXX17_CONSTEXPR reverse_iterator& |
320 | operator-=(difference_type __n) |
321 | { |
322 | current += __n; |
323 | return *this; |
324 | } |
325 | |
326 | |
327 | |
328 | |
329 | |
330 | |
331 | _GLIBCXX17_CONSTEXPR reference |
332 | operator[](difference_type __n) const |
333 | { return *(*this + __n); } |
334 | |
335 | #if __cplusplus > 201703L && __cpp_lib_concepts |
336 | friend constexpr iter_rvalue_reference_t<_Iterator> |
337 | iter_move(const reverse_iterator& __i) |
338 | noexcept(is_nothrow_copy_constructible_v<_Iterator> |
339 | && noexcept(ranges::iter_move(--std::declval<_Iterator&>()))) |
340 | { |
341 | auto __tmp = __i.base(); |
342 | return ranges::iter_move(--__tmp); |
343 | } |
344 | |
345 | template<indirectly_swappable<_Iterator> _Iter2> |
346 | friend constexpr void |
347 | iter_swap(const reverse_iterator& __x, |
348 | const reverse_iterator<_Iter2>& __y) |
349 | noexcept(is_nothrow_copy_constructible_v<_Iterator> |
350 | && is_nothrow_copy_constructible_v<_Iter2> |
351 | && noexcept(ranges::iter_swap(--std::declval<_Iterator&>(), |
352 | --std::declval<_Iter2&>()))) |
353 | { |
354 | auto __xtmp = __x.base(); |
355 | auto __ytmp = __y.base(); |
356 | ranges::iter_swap(--__xtmp, --__ytmp); |
357 | } |
358 | #endif |
359 | |
360 | private: |
361 | template<typename _Tp> |
362 | static _GLIBCXX17_CONSTEXPR _Tp* |
363 | _S_to_pointer(_Tp* __p) |
364 | { return __p; } |
365 | |
366 | template<typename _Tp> |
367 | static _GLIBCXX17_CONSTEXPR pointer |
368 | _S_to_pointer(_Tp __t) |
369 | { return __t.operator->(); } |
370 | }; |
371 | |
372 | |
373 | |
374 | |
375 | |
376 | |
377 | |
378 | |
379 | |
380 | |
381 | |
382 | #if __cplusplus <= 201703L || ! defined __cpp_lib_concepts |
383 | template<typename _Iterator> |
384 | inline _GLIBCXX17_CONSTEXPR bool |
385 | operator==(const reverse_iterator<_Iterator>& __x, |
386 | const reverse_iterator<_Iterator>& __y) |
387 | { return __x.base() == __y.base(); } |
| 14 | | Assuming the condition is false | |
|
| 15 | | Returning zero, which participates in a condition later | |
|
388 | |
389 | template<typename _Iterator> |
390 | inline _GLIBCXX17_CONSTEXPR bool |
391 | operator<(const reverse_iterator<_Iterator>& __x, |
392 | const reverse_iterator<_Iterator>& __y) |
393 | { return __y.base() < __x.base(); } |
394 | |
395 | template<typename _Iterator> |
396 | inline _GLIBCXX17_CONSTEXPR bool |
397 | operator!=(const reverse_iterator<_Iterator>& __x, |
398 | const reverse_iterator<_Iterator>& __y) |
399 | { return !(__x == __y); } |
| 13 | | Calling 'operator==<clang::Stmt *const *>' | |
|
| 16 | | Returning from 'operator==<clang::Stmt *const *>' | |
|
| 17 | | Returning the value 1, which participates in a condition later | |
|
400 | |
401 | template<typename _Iterator> |
402 | inline _GLIBCXX17_CONSTEXPR bool |
403 | operator>(const reverse_iterator<_Iterator>& __x, |
404 | const reverse_iterator<_Iterator>& __y) |
405 | { return __y < __x; } |
406 | |
407 | template<typename _Iterator> |
408 | inline _GLIBCXX17_CONSTEXPR bool |
409 | operator<=(const reverse_iterator<_Iterator>& __x, |
410 | const reverse_iterator<_Iterator>& __y) |
411 | { return !(__y < __x); } |
412 | |
413 | template<typename _Iterator> |
414 | inline _GLIBCXX17_CONSTEXPR bool |
415 | operator>=(const reverse_iterator<_Iterator>& __x, |
416 | const reverse_iterator<_Iterator>& __y) |
417 | { return !(__x < __y); } |
418 | |
419 | |
420 | |
421 | template<typename _IteratorL, typename _IteratorR> |
422 | inline _GLIBCXX17_CONSTEXPR bool |
423 | operator==(const reverse_iterator<_IteratorL>& __x, |
424 | const reverse_iterator<_IteratorR>& __y) |
425 | { return __x.base() == __y.base(); } |
426 | |
427 | template<typename _IteratorL, typename _IteratorR> |
428 | inline _GLIBCXX17_CONSTEXPR bool |
429 | operator<(const reverse_iterator<_IteratorL>& __x, |
430 | const reverse_iterator<_IteratorR>& __y) |
431 | { return __y.base() < __x.base(); } |
432 | |
433 | template<typename _IteratorL, typename _IteratorR> |
434 | inline _GLIBCXX17_CONSTEXPR bool |
435 | operator!=(const reverse_iterator<_IteratorL>& __x, |
436 | const reverse_iterator<_IteratorR>& __y) |
437 | { return !(__x == __y); } |
438 | |
439 | template<typename _IteratorL, typename _IteratorR> |
440 | inline _GLIBCXX17_CONSTEXPR bool |
441 | operator>(const reverse_iterator<_IteratorL>& __x, |
442 | const reverse_iterator<_IteratorR>& __y) |
443 | { return __y < __x; } |
444 | |
445 | template<typename _IteratorL, typename _IteratorR> |
446 | inline _GLIBCXX17_CONSTEXPR bool |
447 | operator<=(const reverse_iterator<_IteratorL>& __x, |
448 | const reverse_iterator<_IteratorR>& __y) |
449 | { return !(__y < __x); } |
450 | |
451 | template<typename _IteratorL, typename _IteratorR> |
452 | inline _GLIBCXX17_CONSTEXPR bool |
453 | operator>=(const reverse_iterator<_IteratorL>& __x, |
454 | const reverse_iterator<_IteratorR>& __y) |
455 | { return !(__x < __y); } |
456 | #else // C++20 |
457 | template<typename _IteratorL, typename _IteratorR> |
458 | constexpr bool |
459 | operator==(const reverse_iterator<_IteratorL>& __x, |
460 | const reverse_iterator<_IteratorR>& __y) |
461 | requires requires { { __x.base() == __y.base() } -> convertible_to<bool>; } |
462 | { return __x.base() == __y.base(); } |
463 | |
464 | template<typename _IteratorL, typename _IteratorR> |
465 | constexpr bool |
466 | operator!=(const reverse_iterator<_IteratorL>& __x, |
467 | const reverse_iterator<_IteratorR>& __y) |
468 | requires requires { { __x.base() != __y.base() } -> convertible_to<bool>; } |
469 | { return __x.base() != __y.base(); } |
470 | |
471 | template<typename _IteratorL, typename _IteratorR> |
472 | constexpr bool |
473 | operator<(const reverse_iterator<_IteratorL>& __x, |
474 | const reverse_iterator<_IteratorR>& __y) |
475 | requires requires { { __x.base() > __y.base() } -> convertible_to<bool>; } |
476 | { return __x.base() > __y.base(); } |
477 | |
478 | template<typename _IteratorL, typename _IteratorR> |
479 | constexpr bool |
480 | operator>(const reverse_iterator<_IteratorL>& __x, |
481 | const reverse_iterator<_IteratorR>& __y) |
482 | requires requires { { __x.base() < __y.base() } -> convertible_to<bool>; } |
483 | { return __x.base() < __y.base(); } |
484 | |
485 | template<typename _IteratorL, typename _IteratorR> |
486 | constexpr bool |
487 | operator<=(const reverse_iterator<_IteratorL>& __x, |
488 | const reverse_iterator<_IteratorR>& __y) |
489 | requires requires { { __x.base() >= __y.base() } -> convertible_to<bool>; } |
490 | { return __x.base() >= __y.base(); } |
491 | |
492 | template<typename _IteratorL, typename _IteratorR> |
493 | constexpr bool |
494 | operator>=(const reverse_iterator<_IteratorL>& __x, |
495 | const reverse_iterator<_IteratorR>& __y) |
496 | requires requires { { __x.base() <= __y.base() } -> convertible_to<bool>; } |
497 | { return __x.base() <= __y.base(); } |
498 | |
499 | template<typename _IteratorL, |
500 | three_way_comparable_with<_IteratorL> _IteratorR> |
501 | constexpr compare_three_way_result_t<_IteratorL, _IteratorR> |
502 | operator<=>(const reverse_iterator<_IteratorL>& __x, |
503 | const reverse_iterator<_IteratorR>& __y) |
504 | { return __y.base() <=> __x.base(); } |
505 | #endif // C++20 |
506 | |
507 | |
508 | #if __cplusplus < 201103L |
509 | template<typename _Iterator> |
510 | inline typename reverse_iterator<_Iterator>::difference_type |
511 | operator-(const reverse_iterator<_Iterator>& __x, |
512 | const reverse_iterator<_Iterator>& __y) |
513 | { return __y.base() - __x.base(); } |
514 | |
515 | template<typename _IteratorL, typename _IteratorR> |
516 | inline typename reverse_iterator<_IteratorL>::difference_type |
517 | operator-(const reverse_iterator<_IteratorL>& __x, |
518 | const reverse_iterator<_IteratorR>& __y) |
519 | { return __y.base() - __x.base(); } |
520 | #else |
521 | |
522 | |
523 | template<typename _IteratorL, typename _IteratorR> |
524 | inline _GLIBCXX17_CONSTEXPR auto |
525 | operator-(const reverse_iterator<_IteratorL>& __x, |
526 | const reverse_iterator<_IteratorR>& __y) |
527 | -> decltype(__y.base() - __x.base()) |
528 | { return __y.base() - __x.base(); } |
529 | #endif |
530 | |
531 | template<typename _Iterator> |
532 | inline _GLIBCXX17_CONSTEXPR reverse_iterator<_Iterator> |
533 | operator+(typename reverse_iterator<_Iterator>::difference_type __n, |
534 | const reverse_iterator<_Iterator>& __x) |
535 | { return reverse_iterator<_Iterator>(__x.base() - __n); } |
536 | |
537 | #if __cplusplus >= 201103L |
538 | |
539 | template<typename _Iterator> |
540 | inline _GLIBCXX17_CONSTEXPR reverse_iterator<_Iterator> |
541 | __make_reverse_iterator(_Iterator __i) |
542 | { return reverse_iterator<_Iterator>(__i); } |
543 | |
544 | # if __cplusplus >= 201402L |
545 | # define __cpp_lib_make_reverse_iterator 201402 |
546 | |
547 | |
548 | |
549 | |
550 | template<typename _Iterator> |
551 | inline _GLIBCXX17_CONSTEXPR reverse_iterator<_Iterator> |
552 | make_reverse_iterator(_Iterator __i) |
553 | { return reverse_iterator<_Iterator>(__i); } |
554 | |
555 | # if __cplusplus > 201703L && defined __cpp_lib_concepts |
556 | template<typename _Iterator1, typename _Iterator2> |
557 | requires (!sized_sentinel_for<_Iterator1, _Iterator2>) |
558 | inline constexpr bool |
559 | disable_sized_sentinel_for<reverse_iterator<_Iterator1>, |
560 | reverse_iterator<_Iterator2>> = true; |
561 | # endif // C++20 |
562 | # endif // C++14 |
563 | |
564 | template<typename _Iterator> |
565 | _GLIBCXX20_CONSTEXPR |
566 | auto |
567 | __niter_base(reverse_iterator<_Iterator> __it) |
568 | -> decltype(__make_reverse_iterator(__niter_base(__it.base()))) |
569 | { return __make_reverse_iterator(__niter_base(__it.base())); } |
570 | |
571 | template<typename _Iterator> |
572 | struct __is_move_iterator<reverse_iterator<_Iterator> > |
573 | : __is_move_iterator<_Iterator> |
574 | { }; |
575 | |
576 | template<typename _Iterator> |
577 | _GLIBCXX20_CONSTEXPR |
578 | auto |
579 | __miter_base(reverse_iterator<_Iterator> __it) |
580 | -> decltype(__make_reverse_iterator(__miter_base(__it.base()))) |
581 | { return __make_reverse_iterator(__miter_base(__it.base())); } |
582 | #endif // C++11 |
583 | |
584 | |
585 | |
586 | |
587 | |
588 | |
589 | |
590 | |
591 | |
592 | |
593 | |
594 | |
595 | template<typename _Container> |
596 | class back_insert_iterator |
597 | : public iterator<output_iterator_tag, void, void, void, void> |
598 | { |
599 | protected: |
600 | _Container* container; |
601 | |
602 | public: |
603 | |
604 | typedef _Container container_type; |
605 | #if __cplusplus > 201703L |
606 | using difference_type = ptrdiff_t; |
607 | |
608 | constexpr back_insert_iterator() noexcept : container(nullptr) { } |
609 | #endif |
610 | |
611 | |
612 | explicit _GLIBCXX20_CONSTEXPR |
613 | back_insert_iterator(_Container& __x) |
614 | : container(std::__addressof(__x)) { } |
615 | |
616 | |
617 | |
618 | |
619 | |
620 | |
621 | |
622 | |
623 | |
624 | |
625 | |
626 | |
627 | #if __cplusplus < 201103L |
628 | back_insert_iterator& |
629 | operator=(typename _Container::const_reference __value) |
630 | { |
631 | container->push_back(__value); |
632 | return *this; |
633 | } |
634 | #else |
635 | _GLIBCXX20_CONSTEXPR |
636 | back_insert_iterator& |
637 | operator=(const typename _Container::value_type& __value) |
638 | { |
639 | container->push_back(__value); |
640 | return *this; |
641 | } |
642 | |
643 | _GLIBCXX20_CONSTEXPR |
644 | back_insert_iterator& |
645 | operator=(typename _Container::value_type&& __value) |
646 | { |
647 | container->push_back(std::move(__value)); |
648 | return *this; |
649 | } |
650 | #endif |
651 | |
652 | |
653 | _GLIBCXX20_CONSTEXPR |
654 | back_insert_iterator& |
655 | operator*() |
656 | { return *this; } |
657 | |
658 | |
659 | _GLIBCXX20_CONSTEXPR |
660 | back_insert_iterator& |
661 | operator++() |
662 | { return *this; } |
663 | |
664 | |
665 | _GLIBCXX20_CONSTEXPR |
666 | back_insert_iterator |
667 | operator++(int) |
668 | { return *this; } |
669 | }; |
670 | |
671 | |
672 | |
673 | |
674 | |
675 | |
676 | |
677 | |
678 | |
679 | |
680 | |
681 | |
682 | template<typename _Container> |
683 | _GLIBCXX20_CONSTEXPR |
684 | inline back_insert_iterator<_Container> |
685 | back_inserter(_Container& __x) |
686 | { return back_insert_iterator<_Container>(__x); } |
687 | |
688 | |
689 | |
690 | |
691 | |
692 | |
693 | |
694 | |
695 | |
696 | |
697 | |
698 | template<typename _Container> |
699 | class front_insert_iterator |
700 | : public iterator<output_iterator_tag, void, void, void, void> |
701 | { |
702 | protected: |
703 | _Container* container; |
704 | |
705 | public: |
706 | |
707 | typedef _Container container_type; |
708 | #if __cplusplus > 201703L |
709 | using difference_type = ptrdiff_t; |
710 | |
711 | constexpr front_insert_iterator() noexcept : container(nullptr) { } |
712 | #endif |
713 | |
714 | |
715 | explicit _GLIBCXX20_CONSTEXPR |
716 | front_insert_iterator(_Container& __x) |
717 | : container(std::__addressof(__x)) { } |
718 | |
719 | |
720 | |
721 | |
722 | |
723 | |
724 | |
725 | |
726 | |
727 | |
728 | |
729 | |
730 | #if __cplusplus < 201103L |
731 | front_insert_iterator& |
732 | operator=(typename _Container::const_reference __value) |
733 | { |
734 | container->push_front(__value); |
735 | return *this; |
736 | } |
737 | #else |
738 | _GLIBCXX20_CONSTEXPR |
739 | front_insert_iterator& |
740 | operator=(const typename _Container::value_type& __value) |
741 | { |
742 | container->push_front(__value); |
743 | return *this; |
744 | } |
745 | |
746 | _GLIBCXX20_CONSTEXPR |
747 | front_insert_iterator& |
748 | operator=(typename _Container::value_type&& __value) |
749 | { |
750 | container->push_front(std::move(__value)); |
751 | return *this; |
752 | } |
753 | #endif |
754 | |
755 | |
756 | _GLIBCXX20_CONSTEXPR |
757 | front_insert_iterator& |
758 | operator*() |
759 | { return *this; } |
760 | |
761 | |
762 | _GLIBCXX20_CONSTEXPR |
763 | front_insert_iterator& |
764 | operator++() |
765 | { return *this; } |
766 | |
767 | |
768 | _GLIBCXX20_CONSTEXPR |
769 | front_insert_iterator |
770 | operator++(int) |
771 | { return *this; } |
772 | }; |
773 | |
774 | |
775 | |
776 | |
777 | |
778 | |
779 | |
780 | |
781 | |
782 | |
783 | |
784 | |
785 | template<typename _Container> |
786 | _GLIBCXX20_CONSTEXPR |
787 | inline front_insert_iterator<_Container> |
788 | front_inserter(_Container& __x) |
789 | { return front_insert_iterator<_Container>(__x); } |
790 | |
791 | |
792 | |
793 | |
794 | |
795 | |
796 | |
797 | |
798 | |
799 | |
800 | |
801 | |
802 | |
803 | |
804 | |
805 | template<typename _Container> |
806 | class insert_iterator |
807 | : public iterator<output_iterator_tag, void, void, void, void> |
808 | { |
809 | #if __cplusplus > 201703L && defined __cpp_lib_concepts |
810 | using _Iter = std::__detail::__range_iter_t<_Container>; |
811 | |
812 | protected: |
813 | _Container* container = nullptr; |
814 | _Iter iter = _Iter(); |
815 | #else |
816 | typedef typename _Container::iterator _Iter; |
817 | |
818 | protected: |
819 | _Container* container; |
820 | _Iter iter; |
821 | #endif |
822 | |
823 | public: |
824 | |
825 | typedef _Container container_type; |
826 | |
827 | #if __cplusplus > 201703L && defined __cpp_lib_concepts |
828 | using difference_type = ptrdiff_t; |
829 | |
830 | insert_iterator() = default; |
831 | #endif |
832 | |
833 | |
834 | |
835 | |
836 | |
837 | _GLIBCXX20_CONSTEXPR |
838 | insert_iterator(_Container& __x, _Iter __i) |
839 | : container(std::__addressof(__x)), iter(__i) {} |
840 | |
841 | |
842 | |
843 | |
844 | |
845 | |
846 | |
847 | |
848 | |
849 | |
850 | |
851 | |
852 | |
853 | |
854 | |
855 | |
856 | |
857 | |
858 | |
859 | |
860 | |
861 | |
862 | |
863 | |
864 | #if __cplusplus < 201103L |
865 | insert_iterator& |
866 | operator=(typename _Container::const_reference __value) |
867 | { |
868 | iter = container->insert(iter, __value); |
869 | ++iter; |
870 | return *this; |
871 | } |
872 | #else |
873 | _GLIBCXX20_CONSTEXPR |
874 | insert_iterator& |
875 | operator=(const typename _Container::value_type& __value) |
876 | { |
877 | iter = container->insert(iter, __value); |
878 | ++iter; |
879 | return *this; |
880 | } |
881 | |
882 | _GLIBCXX20_CONSTEXPR |
883 | insert_iterator& |
884 | operator=(typename _Container::value_type&& __value) |
885 | { |
886 | iter = container->insert(iter, std::move(__value)); |
887 | ++iter; |
888 | return *this; |
889 | } |
890 | #endif |
891 | |
892 | |
893 | _GLIBCXX20_CONSTEXPR |
894 | insert_iterator& |
895 | operator*() |
896 | { return *this; } |
897 | |
898 | |
899 | _GLIBCXX20_CONSTEXPR |
900 | insert_iterator& |
901 | operator++() |
902 | { return *this; } |
903 | |
904 | |
905 | _GLIBCXX20_CONSTEXPR |
906 | insert_iterator& |
907 | operator++(int) |
908 | { return *this; } |
909 | }; |
910 | |
911 | |
912 | |
913 | |
914 | |
915 | |
916 | |
917 | |
918 | |
919 | |
920 | |
921 | |
922 | |
923 | #if __cplusplus > 201703L && defined __cpp_lib_concepts |
924 | template<typename _Container> |
925 | constexpr insert_iterator<_Container> |
926 | inserter(_Container& __x, std::__detail::__range_iter_t<_Container> __i) |
927 | { return insert_iterator<_Container>(__x, __i); } |
928 | #else |
929 | template<typename _Container, typename _Iterator> |
930 | inline insert_iterator<_Container> |
931 | inserter(_Container& __x, _Iterator __i) |
932 | { |
933 | return insert_iterator<_Container>(__x, |
934 | typename _Container::iterator(__i)); |
935 | } |
936 | #endif |
937 | |
938 | |
939 | |
940 | _GLIBCXX_END_NAMESPACE_VERSION |
941 | } |
942 | |
943 | namespace __gnu_cxx _GLIBCXX_VISIBILITY(default) |
944 | { |
945 | _GLIBCXX_BEGIN_NAMESPACE_VERSION |
946 | |
947 | |
948 | |
949 | |
950 | |
951 | |
952 | |
953 | |
954 | template<typename _Iterator, typename _Container> |
955 | class __normal_iterator |
956 | { |
957 | protected: |
958 | _Iterator _M_current; |
959 | |
960 | typedef std::iterator_traits<_Iterator> __traits_type; |
961 | |
962 | public: |
963 | typedef _Iterator iterator_type; |
964 | typedef typename __traits_type::iterator_category iterator_category; |
965 | typedef typename __traits_type::value_type value_type; |
966 | typedef typename __traits_type::difference_type difference_type; |
967 | typedef typename __traits_type::reference reference; |
968 | typedef typename __traits_type::pointer pointer; |
969 | |
970 | #if __cplusplus > 201703L && __cpp_lib_concepts |
971 | using iterator_concept = std::__detail::__iter_concept<_Iterator>; |
972 | #endif |
973 | |
974 | _GLIBCXX_CONSTEXPR __normal_iterator() _GLIBCXX_NOEXCEPT |
975 | : _M_current(_Iterator()) { } |
976 | |
977 | explicit _GLIBCXX20_CONSTEXPR |
978 | __normal_iterator(const _Iterator& __i) _GLIBCXX_NOEXCEPT |
979 | : _M_current(__i) { } |
980 | |
981 | |
982 | template<typename _Iter> |
983 | _GLIBCXX20_CONSTEXPR |
984 | __normal_iterator(const __normal_iterator<_Iter, |
985 | typename __enable_if< |
986 | (std::__are_same<_Iter, typename _Container::pointer>::__value), |
987 | _Container>::__type>& __i) _GLIBCXX_NOEXCEPT |
988 | : _M_current(__i.base()) { } |
989 | |
990 | |
991 | _GLIBCXX20_CONSTEXPR |
992 | reference |
993 | operator*() const _GLIBCXX_NOEXCEPT |
994 | { return *_M_current; } |
995 | |
996 | _GLIBCXX20_CONSTEXPR |
997 | pointer |
998 | operator->() const _GLIBCXX_NOEXCEPT |
999 | { return _M_current; } |
1000 | |
1001 | _GLIBCXX20_CONSTEXPR |
1002 | __normal_iterator& |
1003 | operator++() _GLIBCXX_NOEXCEPT |
1004 | { |
1005 | ++_M_current; |
1006 | return *this; |
1007 | } |
1008 | |
1009 | _GLIBCXX20_CONSTEXPR |
1010 | __normal_iterator |
1011 | operator++(int) _GLIBCXX_NOEXCEPT |
1012 | { return __normal_iterator(_M_current++); } |
1013 | |
1014 | |
1015 | _GLIBCXX20_CONSTEXPR |
1016 | __normal_iterator& |
1017 | operator--() _GLIBCXX_NOEXCEPT |
1018 | { |
1019 | --_M_current; |
1020 | return *this; |
1021 | } |
1022 | |
1023 | _GLIBCXX20_CONSTEXPR |
1024 | __normal_iterator |
1025 | operator--(int) _GLIBCXX_NOEXCEPT |
1026 | { return __normal_iterator(_M_current--); } |
1027 | |
1028 | |
1029 | _GLIBCXX20_CONSTEXPR |
1030 | reference |
1031 | operator[](difference_type __n) const _GLIBCXX_NOEXCEPT |
1032 | { return _M_current[__n]; } |
1033 | |
1034 | _GLIBCXX20_CONSTEXPR |
1035 | __normal_iterator& |
1036 | operator+=(difference_type __n) _GLIBCXX_NOEXCEPT |
1037 | { _M_current += __n; return *this; } |
1038 | |
1039 | _GLIBCXX20_CONSTEXPR |
1040 | __normal_iterator |
1041 | operator+(difference_type __n) const _GLIBCXX_NOEXCEPT |
1042 | { return __normal_iterator(_M_current + __n); } |
1043 | |
1044 | _GLIBCXX20_CONSTEXPR |
1045 | __normal_iterator& |
1046 | operator-=(difference_type __n) _GLIBCXX_NOEXCEPT |
1047 | { _M_current -= __n; return *this; } |
1048 | |
1049 | _GLIBCXX20_CONSTEXPR |
1050 | __normal_iterator |
1051 | operator-(difference_type __n) const _GLIBCXX_NOEXCEPT |
1052 | { return __normal_iterator(_M_current - __n); } |
1053 | |
1054 | _GLIBCXX20_CONSTEXPR |
1055 | const _Iterator& |
1056 | base() const _GLIBCXX_NOEXCEPT |
1057 | { return _M_current; } |
1058 | }; |
1059 | |
1060 | |
1061 | |
1062 | |
1063 | |
1064 | |
1065 | |
1066 | |
1067 | |
1068 | #if __cpp_lib_three_way_comparison |
1069 | template<typename _IteratorL, typename _IteratorR, typename _Container> |
1070 | requires requires (_IteratorL __lhs, _IteratorR __rhs) |
1071 | { { __lhs == __rhs } -> std::convertible_to<bool>; } |
1072 | constexpr bool |
1073 | operator==(const __normal_iterator<_IteratorL, _Container>& __lhs, |
1074 | const __normal_iterator<_IteratorR, _Container>& __rhs) |
1075 | noexcept(noexcept(__lhs.base() == __rhs.base())) |
1076 | { return __lhs.base() == __rhs.base(); } |
1077 | |
1078 | template<typename _IteratorL, typename _IteratorR, typename _Container> |
1079 | constexpr std::__detail::__synth3way_t<_IteratorR, _IteratorL> |
1080 | operator<=>(const __normal_iterator<_IteratorL, _Container>& __lhs, |
1081 | const __normal_iterator<_IteratorR, _Container>& __rhs) |
1082 | noexcept(noexcept(std::__detail::__synth3way(__lhs.base(), __rhs.base()))) |
1083 | { return std::__detail::__synth3way(__lhs.base(), __rhs.base()); } |
1084 | #else |
1085 | |
1086 | template<typename _IteratorL, typename _IteratorR, typename _Container> |
1087 | _GLIBCXX20_CONSTEXPR |
1088 | inline bool |
1089 | operator==(const __normal_iterator<_IteratorL, _Container>& __lhs, |
1090 | const __normal_iterator<_IteratorR, _Container>& __rhs) |
1091 | _GLIBCXX_NOEXCEPT |
1092 | { return __lhs.base() == __rhs.base(); } |
1093 | |
1094 | template<typename _Iterator, typename _Container> |
1095 | _GLIBCXX20_CONSTEXPR |
1096 | inline bool |
1097 | operator==(const __normal_iterator<_Iterator, _Container>& __lhs, |
1098 | const __normal_iterator<_Iterator, _Container>& __rhs) |
1099 | _GLIBCXX_NOEXCEPT |
1100 | { return __lhs.base() == __rhs.base(); } |
1101 | |
1102 | template<typename _IteratorL, typename _IteratorR, typename _Container> |
1103 | _GLIBCXX20_CONSTEXPR |
1104 | inline bool |
1105 | operator!=(const __normal_iterator<_IteratorL, _Container>& __lhs, |
1106 | const __normal_iterator<_IteratorR, _Container>& __rhs) |
1107 | _GLIBCXX_NOEXCEPT |
1108 | { return __lhs.base() != __rhs.base(); } |
1109 | |
1110 | template<typename _Iterator, typename _Container> |
1111 | _GLIBCXX20_CONSTEXPR |
1112 | inline bool |
1113 | operator!=(const __normal_iterator<_Iterator, _Container>& __lhs, |
1114 | const __normal_iterator<_Iterator, _Container>& __rhs) |
1115 | _GLIBCXX_NOEXCEPT |
1116 | { return __lhs.base() != __rhs.base(); } |
1117 | |
1118 | |
1119 | template<typename _IteratorL, typename _IteratorR, typename _Container> |
1120 | inline bool |
1121 | operator<(const __normal_iterator<_IteratorL, _Container>& __lhs, |
1122 | const __normal_iterator<_IteratorR, _Container>& __rhs) |
1123 | _GLIBCXX_NOEXCEPT |
1124 | { return __lhs.base() < __rhs.base(); } |
1125 | |
1126 | template<typename _Iterator, typename _Container> |
1127 | _GLIBCXX20_CONSTEXPR |
1128 | inline bool |
1129 | operator<(const __normal_iterator<_Iterator, _Container>& __lhs, |
1130 | const __normal_iterator<_Iterator, _Container>& __rhs) |
1131 | _GLIBCXX_NOEXCEPT |
1132 | { return __lhs.base() < __rhs.base(); } |
1133 | |
1134 | template<typename _IteratorL, typename _IteratorR, typename _Container> |
1135 | inline bool |
1136 | operator>(const __normal_iterator<_IteratorL, _Container>& __lhs, |
1137 | const __normal_iterator<_IteratorR, _Container>& __rhs) |
1138 | _GLIBCXX_NOEXCEPT |
1139 | { return __lhs.base() > __rhs.base(); } |
1140 | |
1141 | template<typename _Iterator, typename _Container> |
1142 | _GLIBCXX20_CONSTEXPR |
1143 | inline bool |
1144 | operator>(const __normal_iterator<_Iterator, _Container>& __lhs, |
1145 | const __normal_iterator<_Iterator, _Container>& __rhs) |
1146 | _GLIBCXX_NOEXCEPT |
1147 | { return __lhs.base() > __rhs.base(); } |
1148 | |
1149 | template<typename _IteratorL, typename _IteratorR, typename _Container> |
1150 | inline bool |
1151 | operator<=(const __normal_iterator<_IteratorL, _Container>& __lhs, |
1152 | const __normal_iterator<_IteratorR, _Container>& __rhs) |
1153 | _GLIBCXX_NOEXCEPT |
1154 | { return __lhs.base() <= __rhs.base(); } |
1155 | |
1156 | template<typename _Iterator, typename _Container> |
1157 | _GLIBCXX20_CONSTEXPR |
1158 | inline bool |
1159 | operator<=(const __normal_iterator<_Iterator, _Container>& __lhs, |
1160 | const __normal_iterator<_Iterator, _Container>& __rhs) |
1161 | _GLIBCXX_NOEXCEPT |
1162 | { return __lhs.base() <= __rhs.base(); } |
1163 | |
1164 | template<typename _IteratorL, typename _IteratorR, typename _Container> |
1165 | inline bool |
1166 | operator>=(const __normal_iterator<_IteratorL, _Container>& __lhs, |
1167 | const __normal_iterator<_IteratorR, _Container>& __rhs) |
1168 | _GLIBCXX_NOEXCEPT |
1169 | { return __lhs.base() >= __rhs.base(); } |
1170 | |
1171 | template<typename _Iterator, typename _Container> |
1172 | _GLIBCXX20_CONSTEXPR |
1173 | inline bool |
1174 | operator>=(const __normal_iterator<_Iterator, _Container>& __lhs, |
1175 | const __normal_iterator<_Iterator, _Container>& __rhs) |
1176 | _GLIBCXX_NOEXCEPT |
1177 | { return __lhs.base() >= __rhs.base(); } |
1178 | #endif // three-way comparison |
1179 | |
1180 | |
1181 | |
1182 | |
1183 | |
1184 | template<typename _IteratorL, typename _IteratorR, typename _Container> |
1185 | #if __cplusplus >= 201103L |
1186 | |
1187 | _GLIBCXX20_CONSTEXPR |
1188 | inline auto |
1189 | operator-(const __normal_iterator<_IteratorL, _Container>& __lhs, |
1190 | const __normal_iterator<_IteratorR, _Container>& __rhs) noexcept |
1191 | -> decltype(__lhs.base() - __rhs.base()) |
1192 | #else |
1193 | inline typename __normal_iterator<_IteratorL, _Container>::difference_type |
1194 | operator-(const __normal_iterator<_IteratorL, _Container>& __lhs, |
1195 | const __normal_iterator<_IteratorR, _Container>& __rhs) |
1196 | #endif |
1197 | { return __lhs.base() - __rhs.base(); } |
1198 | |
1199 | template<typename _Iterator, typename _Container> |
1200 | _GLIBCXX20_CONSTEXPR |
1201 | inline typename __normal_iterator<_Iterator, _Container>::difference_type |
1202 | operator-(const __normal_iterator<_Iterator, _Container>& __lhs, |
1203 | const __normal_iterator<_Iterator, _Container>& __rhs) |
1204 | _GLIBCXX_NOEXCEPT |
1205 | { return __lhs.base() - __rhs.base(); } |
1206 | |
1207 | template<typename _Iterator, typename _Container> |
1208 | _GLIBCXX20_CONSTEXPR |
1209 | inline __normal_iterator<_Iterator, _Container> |
1210 | operator+(typename __normal_iterator<_Iterator, _Container>::difference_type |
1211 | __n, const __normal_iterator<_Iterator, _Container>& __i) |
1212 | _GLIBCXX_NOEXCEPT |
1213 | { return __normal_iterator<_Iterator, _Container>(__i.base() + __n); } |
1214 | |
1215 | _GLIBCXX_END_NAMESPACE_VERSION |
1216 | } |
1217 | |
1218 | namespace std _GLIBCXX_VISIBILITY(default) |
1219 | { |
1220 | _GLIBCXX_BEGIN_NAMESPACE_VERSION |
1221 | |
1222 | template<typename _Iterator, typename _Container> |
1223 | _GLIBCXX20_CONSTEXPR |
1224 | _Iterator |
1225 | __niter_base(__gnu_cxx::__normal_iterator<_Iterator, _Container> __it) |
1226 | _GLIBCXX_NOEXCEPT_IF(std::is_nothrow_copy_constructible<_Iterator>::value) |
1227 | { return __it.base(); } |
1228 | |
1229 | #if __cplusplus >= 201103L |
1230 | |
1231 | |
1232 | |
1233 | |
1234 | |
1235 | #if __cplusplus > 201703L && __cpp_lib_concepts |
1236 | template<semiregular _Sent> |
1237 | class move_sentinel |
1238 | { |
1239 | public: |
1240 | constexpr |
1241 | move_sentinel() |
1242 | noexcept(is_nothrow_default_constructible_v<_Sent>) |
1243 | : _M_last() { } |
1244 | |
1245 | constexpr explicit |
1246 | move_sentinel(_Sent __s) |
1247 | noexcept(is_nothrow_move_constructible_v<_Sent>) |
1248 | : _M_last(std::move(__s)) { } |
1249 | |
1250 | template<typename _S2> requires convertible_to<const _S2&, _Sent> |
1251 | constexpr |
1252 | move_sentinel(const move_sentinel<_S2>& __s) |
1253 | noexcept(is_nothrow_constructible_v<_Sent, const _S2&>) |
1254 | : _M_last(__s.base()) |
1255 | { } |
1256 | |
1257 | template<typename _S2> requires assignable_from<_Sent&, const _S2&> |
1258 | constexpr move_sentinel& |
1259 | operator=(const move_sentinel<_S2>& __s) |
1260 | noexcept(is_nothrow_assignable_v<_Sent, const _S2&>) |
1261 | { |
1262 | _M_last = __s.base(); |
1263 | return *this; |
1264 | } |
1265 | |
1266 | constexpr _Sent |
1267 | base() const |
1268 | noexcept(is_nothrow_copy_constructible_v<_Sent>) |
1269 | { return _M_last; } |
1270 | |
1271 | private: |
1272 | _Sent _M_last; |
1273 | }; |
1274 | #endif // C++20 |
1275 | |
1276 | |
1277 | |
1278 | |
1279 | |
1280 | |
1281 | |
1282 | |
1283 | |
1284 | |
1285 | template<typename _Iterator> |
1286 | class move_iterator |
1287 | { |
1288 | _Iterator _M_current; |
1289 | |
1290 | using __traits_type = iterator_traits<_Iterator>; |
1291 | #if __cplusplus > 201703L && __cpp_lib_concepts |
1292 | using __base_cat = typename __traits_type::iterator_category; |
1293 | #else |
1294 | using __base_ref = typename __traits_type::reference; |
1295 | #endif |
1296 | |
1297 | public: |
1298 | using iterator_type = _Iterator; |
1299 | |
1300 | #if __cplusplus > 201703L && __cpp_lib_concepts |
1301 | using iterator_concept = input_iterator_tag; |
1302 | using iterator_category |
1303 | = __detail::__clamp_iter_cat<__base_cat, random_access_iterator_tag>; |
1304 | using value_type = iter_value_t<_Iterator>; |
1305 | using difference_type = iter_difference_t<_Iterator>; |
1306 | using pointer = _Iterator; |
1307 | using reference = iter_rvalue_reference_t<_Iterator>; |
1308 | #else |
1309 | typedef typename __traits_type::iterator_category iterator_category; |
1310 | typedef typename __traits_type::value_type value_type; |
1311 | typedef typename __traits_type::difference_type difference_type; |
1312 | |
1313 | typedef _Iterator pointer; |
1314 | |
1315 | |
1316 | typedef typename conditional<is_reference<__base_ref>::value, |
1317 | typename remove_reference<__base_ref>::type&&, |
1318 | __base_ref>::type reference; |
1319 | #endif |
1320 | |
1321 | _GLIBCXX17_CONSTEXPR |
1322 | move_iterator() |
1323 | : _M_current() { } |
1324 | |
1325 | explicit _GLIBCXX17_CONSTEXPR |
1326 | move_iterator(iterator_type __i) |
1327 | : _M_current(std::move(__i)) { } |
1328 | |
1329 | template<typename _Iter> |
1330 | _GLIBCXX17_CONSTEXPR |
1331 | move_iterator(const move_iterator<_Iter>& __i) |
1332 | : _M_current(__i.base()) { } |
1333 | |
1334 | #if __cplusplus <= 201703L |
1335 | _GLIBCXX17_CONSTEXPR iterator_type |
1336 | base() const |
1337 | { return _M_current; } |
1338 | #else |
1339 | constexpr iterator_type |
1340 | base() const & |
1341 | #if __cpp_lib_concepts |
1342 | requires copy_constructible<iterator_type> |
1343 | #endif |
1344 | { return _M_current; } |
1345 | |
1346 | constexpr iterator_type |
1347 | base() && |
1348 | { return std::move(_M_current); } |
1349 | #endif |
1350 | |
1351 | _GLIBCXX17_CONSTEXPR reference |
1352 | operator*() const |
1353 | #if __cplusplus > 201703L && __cpp_lib_concepts |
1354 | { return ranges::iter_move(_M_current); } |
1355 | #else |
1356 | { return static_cast<reference>(*_M_current); } |
1357 | #endif |
1358 | |
1359 | _GLIBCXX17_CONSTEXPR pointer |
1360 | operator->() const |
1361 | { return _M_current; } |
1362 | |
1363 | _GLIBCXX17_CONSTEXPR move_iterator& |
1364 | operator++() |
1365 | { |
1366 | ++_M_current; |
1367 | return *this; |
1368 | } |
1369 | |
1370 | _GLIBCXX17_CONSTEXPR move_iterator |
1371 | operator++(int) |
1372 | { |
1373 | move_iterator __tmp = *this; |
1374 | ++_M_current; |
1375 | return __tmp; |
1376 | } |
1377 | |
1378 | #if __cpp_lib_concepts |
1379 | constexpr void |
1380 | operator++(int) requires (!forward_iterator<_Iterator>) |
1381 | { ++_M_current; } |
1382 | #endif |
1383 | |
1384 | _GLIBCXX17_CONSTEXPR move_iterator& |
1385 | operator--() |
1386 | { |
1387 | --_M_current; |
1388 | return *this; |
1389 | } |
1390 | |
1391 | _GLIBCXX17_CONSTEXPR move_iterator |
1392 | operator--(int) |
1393 | { |
1394 | move_iterator __tmp = *this; |
1395 | --_M_current; |
1396 | return __tmp; |
1397 | } |
1398 | |
1399 | _GLIBCXX17_CONSTEXPR move_iterator |
1400 | operator+(difference_type __n) const |
1401 | { return move_iterator(_M_current + __n); } |
1402 | |
1403 | _GLIBCXX17_CONSTEXPR move_iterator& |
1404 | operator+=(difference_type __n) |
1405 | { |
1406 | _M_current += __n; |
1407 | return *this; |
1408 | } |
1409 | |
1410 | _GLIBCXX17_CONSTEXPR move_iterator |
1411 | operator-(difference_type __n) const |
1412 | { return move_iterator(_M_current - __n); } |
1413 | |
1414 | _GLIBCXX17_CONSTEXPR move_iterator& |
1415 | operator-=(difference_type __n) |
1416 | { |
1417 | _M_current -= __n; |
1418 | return *this; |
1419 | } |
1420 | |
1421 | _GLIBCXX17_CONSTEXPR reference |
1422 | operator[](difference_type __n) const |
1423 | #if __cplusplus > 201703L && __cpp_lib_concepts |
1424 | { return ranges::iter_move(_M_current + __n); } |
1425 | #else |
1426 | { return std::move(_M_current[__n]); } |
1427 | #endif |
1428 | |
1429 | #if __cplusplus > 201703L && __cpp_lib_concepts |
1430 | template<sentinel_for<_Iterator> _Sent> |
1431 | friend constexpr bool |
1432 | operator==(const move_iterator& __x, const move_sentinel<_Sent>& __y) |
1433 | { return __x.base() == __y.base(); } |
1434 | |
1435 | template<sized_sentinel_for<_Iterator> _Sent> |
1436 | friend constexpr iter_difference_t<_Iterator> |
1437 | operator-(const move_sentinel<_Sent>& __x, const move_iterator& __y) |
1438 | { return __x.base() - __y.base(); } |
1439 | |
1440 | template<sized_sentinel_for<_Iterator> _Sent> |
1441 | friend constexpr iter_difference_t<_Iterator> |
1442 | operator-(const move_iterator& __x, const move_sentinel<_Sent>& __y) |
1443 | { return __x.base() - __y.base(); } |
1444 | |
1445 | friend constexpr iter_rvalue_reference_t<_Iterator> |
1446 | iter_move(const move_iterator& __i) |
1447 | noexcept(noexcept(ranges::iter_move(__i._M_current))) |
1448 | { return ranges::iter_move(__i._M_current); } |
1449 | |
1450 | template<indirectly_swappable<_Iterator> _Iter2> |
1451 | friend constexpr void |
1452 | iter_swap(const move_iterator& __x, const move_iterator<_Iter2>& __y) |
1453 | noexcept(noexcept(ranges::iter_swap(__x._M_current, __y._M_current))) |
1454 | { return ranges::iter_swap(__x._M_current, __y._M_current); } |
1455 | #endif // C++20 |
1456 | }; |
1457 | |
1458 | template<typename _IteratorL, typename _IteratorR> |
1459 | inline _GLIBCXX17_CONSTEXPR bool |
1460 | operator==(const move_iterator<_IteratorL>& __x, |
1461 | const move_iterator<_IteratorR>& __y) |
1462 | #if __cplusplus > 201703L && __cpp_lib_concepts |
1463 | requires requires { { __x.base() == __y.base() } -> convertible_to<bool>; } |
1464 | #endif |
1465 | { return __x.base() == __y.base(); } |
1466 | |
1467 | #if __cpp_lib_three_way_comparison |
1468 | template<typename _IteratorL, |
1469 | three_way_comparable_with<_IteratorL> _IteratorR> |
1470 | constexpr compare_three_way_result_t<_IteratorL, _IteratorR> |
1471 | operator<=>(const move_iterator<_IteratorL>& __x, |
1472 | const move_iterator<_IteratorR>& __y) |
1473 | { return __x.base() <=> __y.base(); } |
1474 | #else |
1475 | template<typename _IteratorL, typename _IteratorR> |
1476 | inline _GLIBCXX17_CONSTEXPR bool |
1477 | operator!=(const move_iterator<_IteratorL>& __x, |
1478 | const move_iterator<_IteratorR>& __y) |
1479 | { return !(__x == __y); } |
1480 | #endif |
1481 | |
1482 | template<typename _IteratorL, typename _IteratorR> |
1483 | inline _GLIBCXX17_CONSTEXPR bool |
1484 | operator<(const move_iterator<_IteratorL>& __x, |
1485 | const move_iterator<_IteratorR>& __y) |
1486 | #if __cplusplus > 201703L && __cpp_lib_concepts |
1487 | requires requires { { __x.base() < __y.base() } -> convertible_to<bool>; } |
1488 | #endif |
1489 | { return __x.base() < __y.base(); } |
1490 | |
1491 | template<typename _IteratorL, typename _IteratorR> |
1492 | inline _GLIBCXX17_CONSTEXPR bool |
1493 | operator<=(const move_iterator<_IteratorL>& __x, |
1494 | const move_iterator<_IteratorR>& __y) |
1495 | #if __cplusplus > 201703L && __cpp_lib_concepts |
1496 | requires requires { { __y.base() < __x.base() } -> convertible_to<bool>; } |
1497 | #endif |
1498 | { return !(__y < __x); } |
1499 | |
1500 | template<typename _IteratorL, typename _IteratorR> |
1501 | inline _GLIBCXX17_CONSTEXPR bool |
1502 | operator>(const move_iterator<_IteratorL>& __x, |
1503 | const move_iterator<_IteratorR>& __y) |
1504 | #if __cplusplus > 201703L && __cpp_lib_concepts |
1505 | requires requires { { __y.base() < __x.base() } -> convertible_to<bool>; } |
1506 | #endif |
1507 | { return __y < __x; } |
1508 | |
1509 | template<typename _IteratorL, typename _IteratorR> |
1510 | inline _GLIBCXX17_CONSTEXPR bool |
1511 | operator>=(const move_iterator<_IteratorL>& __x, |
1512 | const move_iterator<_IteratorR>& __y) |
1513 | #if __cplusplus > 201703L && __cpp_lib_concepts |
1514 | requires requires { { __x.base() < __y.base() } -> convertible_to<bool>; } |
1515 | #endif |
1516 | { return !(__x < __y); } |
1517 | |
1518 | #if ! (__cplusplus > 201703L && __cpp_lib_concepts) |
1519 | |
1520 | |
1521 | |
1522 | |
1523 | |
1524 | |
1525 | |
1526 | template<typename _Iterator> |
1527 | inline _GLIBCXX17_CONSTEXPR bool |
1528 | operator==(const move_iterator<_Iterator>& __x, |
1529 | const move_iterator<_Iterator>& __y) |
1530 | { return __x.base() == __y.base(); } |
1531 | |
1532 | template<typename _Iterator> |
1533 | inline _GLIBCXX17_CONSTEXPR bool |
1534 | operator!=(const move_iterator<_Iterator>& __x, |
1535 | const move_iterator<_Iterator>& __y) |
1536 | { return !(__x == __y); } |
1537 | |
1538 | template<typename _Iterator> |
1539 | inline _GLIBCXX17_CONSTEXPR bool |
1540 | operator<(const move_iterator<_Iterator>& __x, |
1541 | const move_iterator<_Iterator>& __y) |
1542 | { return __x.base() < __y.base(); } |
1543 | |
1544 | template<typename _Iterator> |
1545 | inline _GLIBCXX17_CONSTEXPR bool |
1546 | operator<=(const move_iterator<_Iterator>& __x, |
1547 | const move_iterator<_Iterator>& __y) |
1548 | { return !(__y < __x); } |
1549 | |
1550 | template<typename _Iterator> |
1551 | inline _GLIBCXX17_CONSTEXPR bool |
1552 | operator>(const move_iterator<_Iterator>& __x, |
1553 | const move_iterator<_Iterator>& __y) |
1554 | { return __y < __x; } |
1555 | |
1556 | template<typename _Iterator> |
1557 | inline _GLIBCXX17_CONSTEXPR bool |
1558 | operator>=(const move_iterator<_Iterator>& __x, |
1559 | const move_iterator<_Iterator>& __y) |
1560 | { return !(__x < __y); } |
1561 | #endif // ! C++20 |
1562 | |
1563 | |
1564 | template<typename _IteratorL, typename _IteratorR> |
1565 | inline _GLIBCXX17_CONSTEXPR auto |
1566 | operator-(const move_iterator<_IteratorL>& __x, |
1567 | const move_iterator<_IteratorR>& __y) |
1568 | -> decltype(__x.base() - __y.base()) |
1569 | { return __x.base() - __y.base(); } |
1570 | |
1571 | template<typename _Iterator> |
1572 | inline _GLIBCXX17_CONSTEXPR move_iterator<_Iterator> |
1573 | operator+(typename move_iterator<_Iterator>::difference_type __n, |
1574 | const move_iterator<_Iterator>& __x) |
1575 | { return __x + __n; } |
1576 | |
1577 | template<typename _Iterator> |
1578 | inline _GLIBCXX17_CONSTEXPR move_iterator<_Iterator> |
1579 | make_move_iterator(_Iterator __i) |
1580 | { return move_iterator<_Iterator>(std::move(__i)); } |
1581 | |
1582 | template<typename _Iterator, typename _ReturnType |
1583 | = typename conditional<__move_if_noexcept_cond |
1584 | <typename iterator_traits<_Iterator>::value_type>::value, |
1585 | _Iterator, move_iterator<_Iterator>>::type> |
1586 | inline _GLIBCXX17_CONSTEXPR _ReturnType |
1587 | __make_move_if_noexcept_iterator(_Iterator __i) |
1588 | { return _ReturnType(__i); } |
1589 | |
1590 | |
1591 | |
1592 | template<typename _Tp, typename _ReturnType |
1593 | = typename conditional<__move_if_noexcept_cond<_Tp>::value, |
1594 | const _Tp*, move_iterator<_Tp*>>::type> |
1595 | inline _GLIBCXX17_CONSTEXPR _ReturnType |
1596 | __make_move_if_noexcept_iterator(_Tp* __i) |
1597 | { return _ReturnType(__i); } |
1598 | |
1599 | #if __cplusplus > 201703L && __cpp_lib_concepts |
1600 | |
1601 | |
1602 | namespace __detail |
1603 | { |
1604 | template<typename _It> |
1605 | concept __common_iter_has_arrow = indirectly_readable<const _It> |
1606 | && (requires(const _It& __it) { __it.operator->(); } |
1607 | || is_reference_v<iter_reference_t<_It>> |
1608 | || constructible_from<iter_value_t<_It>, iter_reference_t<_It>>); |
1609 | |
1610 | } |
1611 | |
1612 | |
1613 | template<input_or_output_iterator _It, sentinel_for<_It> _Sent> |
1614 | requires (!same_as<_It, _Sent>) && copyable<_It> |
1615 | class common_iterator |
1616 | { |
1617 | template<typename _Tp, typename _Up> |
1618 | static constexpr bool |
1619 | _S_noexcept1() |
1620 | { |
1621 | if constexpr (is_trivially_default_constructible_v<_Tp>) |
1622 | return is_nothrow_assignable_v<_Tp, _Up>; |
1623 | else |
1624 | return is_nothrow_constructible_v<_Tp, _Up>; |
1625 | } |
1626 | |
1627 | template<typename _It2, typename _Sent2> |
1628 | static constexpr bool |
1629 | _S_noexcept() |
1630 | { return _S_noexcept1<_It, _It2>() && _S_noexcept1<_Sent, _Sent2>(); } |
1631 | |
1632 | class _Proxy |
1633 | { |
1634 | iter_value_t<_It> _M_keep; |
1635 | |
1636 | _Proxy(iter_reference_t<_It>&& __x) |
1637 | : _M_keep(std::move(__x)) { } |
1638 | |
1639 | friend class common_iterator; |
1640 | |
1641 | public: |
1642 | const iter_value_t<_It>* |
1643 | operator->() const |
1644 | { return std::__addressof(_M_keep); } |
1645 | }; |
1646 | |
1647 | public: |
1648 | constexpr |
1649 | common_iterator() |
1650 | noexcept(is_nothrow_default_constructible_v<_It>) |
1651 | : _M_it(), _M_index(0) |
1652 | { } |
1653 | |
1654 | constexpr |
1655 | common_iterator(_It __i) |
1656 | noexcept(is_nothrow_move_constructible_v<_It>) |
1657 | : _M_it(std::move(__i)), _M_index(0) |
1658 | { } |
1659 | |
1660 | constexpr |
1661 | common_iterator(_Sent __s) |
1662 | noexcept(is_nothrow_move_constructible_v<_Sent>) |
1663 | : _M_sent(std::move(__s)), _M_index(1) |
1664 | { } |
1665 | |
1666 | template<typename _It2, typename _Sent2> |
1667 | requires convertible_to<const _It2&, _It> |
1668 | && convertible_to<const _Sent2&, _Sent> |
1669 | constexpr |
1670 | common_iterator(const common_iterator<_It2, _Sent2>& __x) |
1671 | noexcept(_S_noexcept<const _It2&, const _Sent2&>()) |
1672 | : _M_valueless(), _M_index(__x._M_index) |
1673 | { |
1674 | if (_M_index == 0) |
1675 | { |
1676 | if constexpr (is_trivially_default_constructible_v<_It>) |
1677 | _M_it = std::move(__x._M_it); |
1678 | else |
1679 | ::new((void*)std::__addressof(_M_it)) _It(__x._M_it); |
1680 | } |
1681 | else if (_M_index == 1) |
1682 | { |
1683 | if constexpr (is_trivially_default_constructible_v<_Sent>) |
1684 | _M_sent = std::move(__x._M_sent); |
1685 | else |
1686 | ::new((void*)std::__addressof(_M_sent)) _Sent(__x._M_sent); |
1687 | } |
1688 | } |
1689 | |
1690 | constexpr |
1691 | common_iterator(const common_iterator& __x) |
1692 | noexcept(_S_noexcept<const _It&, const _Sent&>()) |
1693 | : _M_valueless(), _M_index(__x._M_index) |
1694 | { |
1695 | if (_M_index == 0) |
1696 | { |
1697 | if constexpr (is_trivially_default_constructible_v<_It>) |
1698 | _M_it = std::move(__x._M_it); |
1699 | else |
1700 | ::new((void*)std::__addressof(_M_it)) _It(__x._M_it); |
1701 | } |
1702 | else if (_M_index == 1) |
1703 | { |
1704 | if constexpr (is_trivially_default_constructible_v<_Sent>) |
1705 | _M_sent = std::move(__x._M_sent); |
1706 | else |
1707 | ::new((void*)std::__addressof(_M_sent)) _Sent(__x._M_sent); |
1708 | } |
1709 | } |
1710 | |
1711 | common_iterator& |
1712 | operator=(const common_iterator& __x) |
1713 | noexcept(is_nothrow_copy_assignable_v<_It> |
1714 | && is_nothrow_copy_assignable_v<_Sent> |
1715 | && is_nothrow_copy_constructible_v<_It> |
1716 | && is_nothrow_copy_constructible_v<_Sent>) |
1717 | { |
1718 | return this->operator=<_It, _Sent>(__x); |
1719 | } |
1720 | |
1721 | template<typename _It2, typename _Sent2> |
1722 | requires convertible_to<const _It2&, _It> |
1723 | && convertible_to<const _Sent2&, _Sent> |
1724 | && assignable_from<_It&, const _It2&> |
1725 | && assignable_from<_Sent&, const _Sent2&> |
1726 | common_iterator& |
1727 | operator=(const common_iterator<_It2, _Sent2>& __x) |
1728 | noexcept(is_nothrow_constructible_v<_It, const _It2&> |
1729 | && is_nothrow_constructible_v<_Sent, const _Sent2&> |
1730 | && is_nothrow_assignable_v<_It, const _It2&> |
1731 | && is_nothrow_assignable_v<_Sent, const _Sent2&>) |
1732 | { |
1733 | switch(_M_index << 2 | __x._M_index) |
1734 | { |
1735 | case 0b0000: |
1736 | _M_it = __x._M_it; |
1737 | break; |
1738 | case 0b0101: |
1739 | _M_sent = __x._M_sent; |
1740 | break; |
1741 | case 0b0001: |
1742 | _M_it.~_It(); |
1743 | _M_index = -1; |
1744 | [[fallthrough]]; |
1745 | case 0b1001: |
1746 | ::new((void*)std::__addressof(_M_sent)) _Sent(__x._M_sent); |
1747 | _M_index = 1; |
1748 | break; |
1749 | case 0b0100: |
1750 | _M_sent.~_Sent(); |
1751 | _M_index = -1; |
1752 | [[fallthrough]]; |
1753 | case 0b1000: |
1754 | ::new((void*)std::__addressof(_M_it)) _It(__x._M_it); |
1755 | _M_index = 0; |
1756 | break; |
1757 | default: |
1758 | __glibcxx_assert(__x._M_has_value()); |
1759 | __builtin_unreachable(); |
1760 | } |
1761 | return *this; |
1762 | } |
1763 | |
1764 | ~common_iterator() |
1765 | { |
1766 | switch (_M_index) |
1767 | { |
1768 | case 0: |
1769 | _M_it.~_It(); |
1770 | break; |
1771 | case 1: |
1772 | _M_sent.~_Sent(); |
1773 | break; |
1774 | } |
1775 | } |
1776 | |
1777 | decltype(auto) |
1778 | operator*() |
1779 | { |
1780 | __glibcxx_assert(_M_index == 0); |
1781 | return *_M_it; |
1782 | } |
1783 | |
1784 | decltype(auto) |
1785 | operator*() const requires __detail::__dereferenceable<const _It> |
1786 | { |
1787 | __glibcxx_assert(_M_index == 0); |
1788 | return *_M_it; |
1789 | } |
1790 | |
1791 | decltype(auto) |
1792 | operator->() const requires __detail::__common_iter_has_arrow<_It> |
1793 | { |
1794 | __glibcxx_assert(_M_index == 0); |
1795 | if constexpr (is_pointer_v<_It> || requires { _M_it.operator->(); }) |
1796 | return _M_it; |
1797 | else if constexpr (is_reference_v<iter_reference_t<_It>>) |
1798 | { |
1799 | auto&& __tmp = *_M_it; |
1800 | return std::__addressof(__tmp); |
1801 | } |
1802 | else |
1803 | return _Proxy{*_M_it}; |
1804 | } |
1805 | |
1806 | common_iterator& |
1807 | operator++() |
1808 | { |
1809 | __glibcxx_assert(_M_index == 0); |
1810 | ++_M_it; |
1811 | return *this; |
1812 | } |
1813 | |
1814 | decltype(auto) |
1815 | operator++(int) |
1816 | { |
1817 | __glibcxx_assert(_M_index == 0); |
1818 | if constexpr (forward_iterator<_It>) |
1819 | { |
1820 | common_iterator __tmp = *this; |
1821 | ++*this; |
1822 | return __tmp; |
1823 | } |
1824 | else |
1825 | return _M_it++; |
1826 | } |
1827 | |
1828 | template<typename _It2, sentinel_for<_It> _Sent2> |
1829 | requires sentinel_for<_Sent, _It2> |
1830 | friend bool |
1831 | operator==(const common_iterator& __x, |
1832 | const common_iterator<_It2, _Sent2>& __y) |
1833 | { |
1834 | switch(__x._M_index << 2 | __y._M_index) |
1835 | { |
1836 | case 0b0000: |
1837 | case 0b0101: |
1838 | return true; |
1839 | case 0b0001: |
1840 | return __x._M_it == __y._M_sent; |
1841 | case 0b0100: |
1842 | return __x._M_sent == __y._M_it; |
1843 | default: |
1844 | __glibcxx_assert(__x._M_has_value()); |
1845 | __glibcxx_assert(__y._M_has_value()); |
1846 | __builtin_unreachable(); |
1847 | } |
1848 | } |
1849 | |
1850 | template<typename _It2, sentinel_for<_It> _Sent2> |
1851 | requires sentinel_for<_Sent, _It2> && equality_comparable_with<_It, _It2> |
1852 | friend bool |
1853 | operator==(const common_iterator& __x, |
1854 | const common_iterator<_It2, _Sent2>& __y) |
1855 | { |
1856 | switch(__x._M_index << 2 | __y._M_index) |
1857 | { |
1858 | case 0b0101: |
1859 | return true; |
1860 | case 0b0000: |
1861 | return __x._M_it == __y._M_it; |
1862 | case 0b0001: |
1863 | return __x._M_it == __y._M_sent; |
1864 | case 0b0100: |
1865 | return __x._M_sent == __y._M_it; |
1866 | default: |
1867 | __glibcxx_assert(__x._M_has_value()); |
1868 | __glibcxx_assert(__y._M_has_value()); |
1869 | __builtin_unreachable(); |
1870 | } |
1871 | } |
1872 | |
1873 | template<sized_sentinel_for<_It> _It2, sized_sentinel_for<_It> _Sent2> |
1874 | requires sized_sentinel_for<_Sent, _It2> |
1875 | friend iter_difference_t<_It2> |
1876 | operator-(const common_iterator& __x, |
1877 | const common_iterator<_It2, _Sent2>& __y) |
1878 | { |
1879 | switch(__x._M_index << 2 | __y._M_index) |
1880 | { |
1881 | case 0b0101: |
1882 | return 0; |
1883 | case 0b0000: |
1884 | return __x._M_it - __y._M_it; |
1885 | case 0b0001: |
1886 | return __x._M_it - __y._M_sent; |
1887 | case 0b0100: |
1888 | return __x._M_sent - __y._M_it; |
1889 | default: |
1890 | __glibcxx_assert(__x._M_has_value()); |
1891 | __glibcxx_assert(__y._M_has_value()); |
1892 | __builtin_unreachable(); |
1893 | } |
1894 | } |
1895 | |
1896 | friend iter_rvalue_reference_t<_It> |
1897 | iter_move(const common_iterator& __i) |
1898 | noexcept(noexcept(ranges::iter_move(std::declval<const _It&>()))) |
1899 | requires input_iterator<_It> |
1900 | { |
1901 | __glibcxx_assert(__i._M_index == 0); |
1902 | return ranges::iter_move(__i._M_it); |
1903 | } |
1904 | |
1905 | template<indirectly_swappable<_It> _It2, typename _Sent2> |
1906 | friend void |
1907 | iter_swap(const common_iterator& __x, |
1908 | const common_iterator<_It2, _Sent2>& __y) |
1909 | noexcept(noexcept(ranges::iter_swap(std::declval<const _It&>(), |
1910 | std::declval<const _It2&>()))) |
1911 | { |
1912 | __glibcxx_assert(__x._M_index == 0); |
1913 | __glibcxx_assert(__y._M_index == 0); |
1914 | return ranges::iter_swap(__x._M_it, __y._M_it); |
1915 | } |
1916 | |
1917 | private: |
1918 | template<input_or_output_iterator _It2, sentinel_for<_It2> _Sent2> |
1919 | friend class common_iterator; |
1920 | |
1921 | bool _M_has_value() const noexcept { return _M_index < 2; } |
1922 | |
1923 | union |
1924 | { |
1925 | _It _M_it; |
1926 | _Sent _M_sent; |
1927 | unsigned char _M_valueless; |
1928 | }; |
1929 | unsigned char _M_index; |
1930 | }; |
1931 | |
1932 | template<typename _It, typename _Sent> |
1933 | struct incrementable_traits<common_iterator<_It, _Sent>> |
1934 | { |
1935 | using difference_type = iter_difference_t<_It>; |
1936 | }; |
1937 | |
1938 | template<input_iterator _It, typename _Sent> |
1939 | struct iterator_traits<common_iterator<_It, _Sent>> |
1940 | { |
1941 | private: |
1942 | template<typename _Iter> |
1943 | struct __ptr |
1944 | { |
1945 | using type = void; |
1946 | }; |
1947 | |
1948 | template<typename _Iter> |
1949 | requires __detail::__common_iter_has_arrow<_Iter> |
1950 | struct __ptr<_Iter> |
1951 | { |
1952 | using _CIter = common_iterator<_Iter, _Sent>; |
1953 | using type = decltype(std::declval<const _CIter&>().operator->()); |
1954 | }; |
1955 | |
1956 | public: |
1957 | using iterator_concept = conditional_t<forward_iterator<_It>, |
1958 | forward_iterator_tag, input_iterator_tag>; |
1959 | using iterator_category = __detail::__clamp_iter_cat< |
1960 | typename iterator_traits<_It>::iterator_category, |
1961 | forward_iterator_tag, input_iterator_tag>; |
1962 | using value_type = iter_value_t<_It>; |
1963 | using difference_type = iter_difference_t<_It>; |
1964 | using pointer = typename __ptr<_It>::type; |
1965 | using reference = iter_reference_t<_It>; |
1966 | }; |
1967 | |
1968 | |
1969 | |
1970 | |
1971 | template<input_or_output_iterator _It> |
1972 | class counted_iterator |
1973 | { |
1974 | public: |
1975 | using iterator_type = _It; |
1976 | |
1977 | constexpr counted_iterator() = default; |
1978 | |
1979 | constexpr |
1980 | counted_iterator(_It __i, iter_difference_t<_It> __n) |
1981 | : _M_current(std::move(__i)), _M_length(__n) |
1982 | { __glibcxx_assert(__n >= 0); } |
1983 | |
1984 | template<typename _It2> |
1985 | requires convertible_to<const _It2&, _It> |
1986 | constexpr |
1987 | counted_iterator(const counted_iterator<_It2>& __x) |
1988 | : _M_current(__x._M_current), _M_length(__x._M_length) |
1989 | { } |
1990 | |
1991 | template<typename _It2> |
1992 | requires assignable_from<_It&, const _It2&> |
1993 | constexpr counted_iterator& |
1994 | operator=(const counted_iterator<_It2>& __x) |
1995 | { |
1996 | _M_current = __x._M_current; |
1997 | _M_length = __x._M_length; |
1998 | return *this; |
1999 | } |
2000 | |
2001 | constexpr _It |
2002 | base() const & |
2003 | noexcept(is_nothrow_copy_constructible_v<_It>) |
2004 | requires copy_constructible<_It> |
2005 | { return _M_current; } |
2006 | |
2007 | constexpr _It |
2008 | base() && |
2009 | noexcept(is_nothrow_move_constructible_v<_It>) |
2010 | { return std::move(_M_current); } |
2011 | |
2012 | constexpr iter_difference_t<_It> |
2013 | count() const noexcept { return _M_length; } |
2014 | |
2015 | constexpr decltype(auto) |
2016 | operator*() |
2017 | noexcept(noexcept(*_M_current)) |
2018 | { return *_M_current; } |
2019 | |
2020 | constexpr decltype(auto) |
2021 | operator*() const |
2022 | noexcept(noexcept(*_M_current)) |
2023 | requires __detail::__dereferenceable<const _It> |
2024 | { return *_M_current; } |
2025 | |
2026 | constexpr counted_iterator& |
2027 | operator++() |
2028 | { |
2029 | __glibcxx_assert(_M_length > 0); |
2030 | ++_M_current; |
2031 | --_M_length; |
2032 | return *this; |
2033 | } |
2034 | |
2035 | decltype(auto) |
2036 | operator++(int) |
2037 | { |
2038 | __glibcxx_assert(_M_length > 0); |
2039 | --_M_length; |
2040 | __try |
2041 | { |
2042 | return _M_current++; |
2043 | } __catch(...) { |
2044 | ++_M_length; |
2045 | __throw_exception_again; |
2046 | } |
2047 | |
2048 | } |
2049 | |
2050 | constexpr counted_iterator |
2051 | operator++(int) requires forward_iterator<_It> |
2052 | { |
2053 | auto __tmp = *this; |
2054 | ++*this; |
2055 | return __tmp; |
2056 | } |
2057 | |
2058 | constexpr counted_iterator& |
2059 | operator--() requires bidirectional_iterator<_It> |
2060 | { |
2061 | --_M_current; |
2062 | ++_M_length; |
2063 | return *this; |
2064 | } |
2065 | |
2066 | constexpr counted_iterator |
2067 | operator--(int) requires bidirectional_iterator<_It> |
2068 | { |
2069 | auto __tmp = *this; |
2070 | --*this; |
2071 | return __tmp; |
2072 | } |
2073 | |
2074 | constexpr counted_iterator |
2075 | operator+(iter_difference_t<_It> __n) const |
2076 | requires random_access_iterator<_It> |
2077 | { return counted_iterator(_M_current + __n, _M_length - __n); } |
2078 | |
2079 | friend constexpr counted_iterator |
2080 | operator+(iter_difference_t<_It> __n, const counted_iterator& __x) |
2081 | requires random_access_iterator<_It> |
2082 | { return __x + __n; } |
2083 | |
2084 | constexpr counted_iterator& |
2085 | operator+=(iter_difference_t<_It> __n) |
2086 | requires random_access_iterator<_It> |
2087 | { |
2088 | __glibcxx_assert(__n <= _M_length); |
2089 | _M_current += __n; |
2090 | _M_length -= __n; |
2091 | return *this; |
2092 | } |
2093 | |
2094 | constexpr counted_iterator |
2095 | operator-(iter_difference_t<_It> __n) const |
2096 | requires random_access_iterator<_It> |
2097 | { return counted_iterator(_M_current - __n, _M_length + __n); } |
2098 | |
2099 | template<common_with<_It> _It2> |
2100 | friend constexpr iter_difference_t<_It2> |
2101 | operator-(const counted_iterator& __x, |
2102 | const counted_iterator<_It2>& __y) |
2103 | { return __y._M_length - __x._M_length; } |
2104 | |
2105 | friend constexpr iter_difference_t<_It> |
2106 | operator-(const counted_iterator& __x, default_sentinel_t) |
2107 | { return -__x._M_length; } |
2108 | |
2109 | friend constexpr iter_difference_t<_It> |
2110 | operator-(default_sentinel_t, const counted_iterator& __y) |
2111 | { return __y._M_length; } |
2112 | |
2113 | constexpr counted_iterator& |
2114 | operator-=(iter_difference_t<_It> __n) |
2115 | requires random_access_iterator<_It> |
2116 | { |
2117 | __glibcxx_assert(-__n <= _M_length); |
2118 | _M_current -= __n; |
2119 | _M_length += __n; |
2120 | return *this; |
2121 | } |
2122 | |
2123 | constexpr decltype(auto) |
2124 | operator[](iter_difference_t<_It> __n) const |
2125 | noexcept(noexcept(_M_current[__n])) |
2126 | requires random_access_iterator<_It> |
2127 | { |
2128 | __glibcxx_assert(__n < _M_length); |
2129 | return _M_current[__n]; |
2130 | } |
2131 | |
2132 | template<common_with<_It> _It2> |
2133 | friend constexpr bool |
2134 | operator==(const counted_iterator& __x, |
2135 | const counted_iterator<_It2>& __y) |
2136 | { return __x._M_length == __y._M_length; } |
2137 | |
2138 | friend constexpr bool |
2139 | operator==(const counted_iterator& __x, default_sentinel_t) |
2140 | { return __x._M_length == 0; } |
2141 | |
2142 | template<common_with<_It> _It2> |
2143 | friend constexpr strong_ordering |
2144 | operator<=>(const counted_iterator& __x, |
2145 | const counted_iterator<_It2>& __y) |
2146 | { return __y._M_length <=> __x._M_length; } |
2147 | |
2148 | friend constexpr iter_rvalue_reference_t<_It> |
2149 | iter_move(const counted_iterator& __i) |
2150 | noexcept(noexcept(ranges::iter_move(__i._M_current))) |
2151 | requires input_iterator<_It> |
2152 | { return ranges::iter_move(__i._M_current); } |
2153 | |
2154 | template<indirectly_swappable<_It> _It2> |
2155 | friend constexpr void |
2156 | iter_swap(const counted_iterator& __x, |
2157 | const counted_iterator<_It2>& __y) |
2158 | noexcept(noexcept(ranges::iter_swap(__x._M_current, __y._M_current))) |
2159 | { ranges::iter_swap(__x._M_current, __y._M_current); } |
2160 | |
2161 | private: |
2162 | template<input_or_output_iterator _It2> friend class counted_iterator; |
2163 | |
2164 | _It _M_current = _It(); |
2165 | iter_difference_t<_It> _M_length = 0; |
2166 | }; |
2167 | |
2168 | template<typename _It> |
2169 | struct incrementable_traits<counted_iterator<_It>> |
2170 | { |
2171 | using difference_type = iter_difference_t<_It>; |
2172 | }; |
2173 | |
2174 | template<input_iterator _It> |
2175 | struct iterator_traits<counted_iterator<_It>> : iterator_traits<_It> |
2176 | { |
2177 | using pointer = void; |
2178 | }; |
2179 | #endif // C++20 |
2180 | |
2181 | |
2182 | |
2183 | template<typename _Iterator> |
2184 | auto |
2185 | __niter_base(move_iterator<_Iterator> __it) |
2186 | -> decltype(make_move_iterator(__niter_base(__it.base()))) |
2187 | { return make_move_iterator(__niter_base(__it.base())); } |
2188 | |
2189 | template<typename _Iterator> |
2190 | struct __is_move_iterator<move_iterator<_Iterator> > |
2191 | { |
2192 | enum { __value = 1 }; |
2193 | typedef __true_type __type; |
2194 | }; |
2195 | |
2196 | template<typename _Iterator> |
2197 | auto |
2198 | __miter_base(move_iterator<_Iterator> __it) |
2199 | -> decltype(__miter_base(__it.base())) |
2200 | { return __miter_base(__it.base()); } |
2201 | |
2202 | #define _GLIBCXX_MAKE_MOVE_ITERATOR(_Iter) std::make_move_iterator(_Iter) |
2203 | #define _GLIBCXX_MAKE_MOVE_IF_NOEXCEPT_ITERATOR(_Iter) \ |
2204 | std::__make_move_if_noexcept_iterator(_Iter) |
2205 | #else |
2206 | #define _GLIBCXX_MAKE_MOVE_ITERATOR(_Iter) (_Iter) |
2207 | #define _GLIBCXX_MAKE_MOVE_IF_NOEXCEPT_ITERATOR(_Iter) (_Iter) |
2208 | #endif // C++11 |
2209 | |
2210 | #if __cpp_deduction_guides >= 201606 |
2211 | |
2212 | |
2213 | template<typename _InputIterator> |
2214 | using __iter_key_t = remove_const_t< |
2215 | typename iterator_traits<_InputIterator>::value_type::first_type>; |
2216 | |
2217 | template<typename _InputIterator> |
2218 | using __iter_val_t = |
2219 | typename iterator_traits<_InputIterator>::value_type::second_type; |
2220 | |
2221 | template<typename _T1, typename _T2> |
2222 | struct pair; |
2223 | |
2224 | template<typename _InputIterator> |
2225 | using __iter_to_alloc_t = |
2226 | pair<add_const_t<__iter_key_t<_InputIterator>>, |
2227 | __iter_val_t<_InputIterator>>; |
2228 | #endif // __cpp_deduction_guides |
2229 | |
2230 | _GLIBCXX_END_NAMESPACE_VERSION |
2231 | } |
2232 | |
2233 | #ifdef _GLIBCXX_DEBUG |
2234 | # include <debug/stl_iterator.h> |
2235 | #endif |
2236 | |
2237 | #endif |