1 | // Vector implementation -*- C++ -*- |
2 | |
3 | // Copyright (C) 2001-2024 Free Software Foundation, Inc. |
4 | // |
5 | // This file is part of the GNU ISO C++ Library. This library is free |
6 | // software; you can redistribute it and/or modify it under the |
7 | // terms of the GNU General Public License as published by the |
8 | // Free Software Foundation; either version 3, or (at your option) |
9 | // any later version. |
10 | |
11 | // This library is distributed in the hope that it will be useful, |
12 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | // GNU General Public License for more details. |
15 | |
16 | // Under Section 7 of GPL version 3, you are granted additional |
17 | // permissions described in the GCC Runtime Library Exception, version |
18 | // 3.1, as published by the Free Software Foundation. |
19 | |
20 | // You should have received a copy of the GNU General Public License and |
21 | // a copy of the GCC Runtime Library Exception along with this program; |
22 | // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
23 | // <http://www.gnu.org/licenses/>. |
24 | |
25 | /* |
26 | * |
27 | * Copyright (c) 1994 |
28 | * Hewlett-Packard Company |
29 | * |
30 | * Permission to use, copy, modify, distribute and sell this software |
31 | * and its documentation for any purpose is hereby granted without fee, |
32 | * provided that the above copyright notice appear in all copies and |
33 | * that both that copyright notice and this permission notice appear |
34 | * in supporting documentation. Hewlett-Packard Company makes no |
35 | * representations about the suitability of this software for any |
36 | * purpose. It is provided "as is" without express or implied warranty. |
37 | * |
38 | * |
39 | * Copyright (c) 1996 |
40 | * Silicon Graphics Computer Systems, Inc. |
41 | * |
42 | * Permission to use, copy, modify, distribute and sell this software |
43 | * and its documentation for any purpose is hereby granted without fee, |
44 | * provided that the above copyright notice appear in all copies and |
45 | * that both that copyright notice and this permission notice appear |
46 | * in supporting documentation. Silicon Graphics makes no |
47 | * representations about the suitability of this software for any |
48 | * purpose. It is provided "as is" without express or implied warranty. |
49 | */ |
50 | |
51 | /** @file bits/stl_vector.h |
52 | * This is an internal header file, included by other library headers. |
53 | * Do not attempt to use it directly. @headername{vector} |
54 | */ |
55 | |
56 | #ifndef _STL_VECTOR_H |
57 | #define _STL_VECTOR_H 1 |
58 | |
59 | #include <bits/stl_iterator_base_funcs.h> |
60 | #include <bits/functexcept.h> |
61 | #include <bits/concept_check.h> |
62 | #if __cplusplus >= 201103L |
63 | #include <initializer_list> |
64 | #endif |
65 | #if __cplusplus >= 202002L |
66 | # include <compare> |
67 | #endif |
68 | |
69 | #include <debug/assertions.h> |
70 | |
71 | #if _GLIBCXX_SANITIZE_STD_ALLOCATOR && _GLIBCXX_SANITIZE_VECTOR |
72 | extern "C" void |
73 | __sanitizer_annotate_contiguous_container(const void*, const void*, |
74 | const void*, const void*); |
75 | #endif |
76 | |
77 | namespace std _GLIBCXX_VISIBILITY(default) |
78 | { |
79 | _GLIBCXX_BEGIN_NAMESPACE_VERSION |
80 | _GLIBCXX_BEGIN_NAMESPACE_CONTAINER |
81 | |
82 | /// See bits/stl_deque.h's _Deque_base for an explanation. |
83 | template<typename _Tp, typename _Alloc> |
84 | struct _Vector_base |
85 | { |
86 | typedef typename __gnu_cxx::__alloc_traits<_Alloc>::template |
87 | rebind<_Tp>::other _Tp_alloc_type; |
88 | typedef typename __gnu_cxx::__alloc_traits<_Tp_alloc_type>::pointer |
89 | pointer; |
90 | |
91 | struct _Vector_impl_data |
92 | { |
93 | pointer _M_start; |
94 | pointer _M_finish; |
95 | pointer _M_end_of_storage; |
96 | |
97 | _GLIBCXX20_CONSTEXPR |
98 | _Vector_impl_data() _GLIBCXX_NOEXCEPT |
99 | : _M_start(), _M_finish(), _M_end_of_storage() |
100 | { } |
101 | |
102 | #if __cplusplus >= 201103L |
103 | _GLIBCXX20_CONSTEXPR |
104 | _Vector_impl_data(_Vector_impl_data&& __x) noexcept |
105 | : _M_start(__x._M_start), _M_finish(__x._M_finish), |
106 | _M_end_of_storage(__x._M_end_of_storage) |
107 | { __x._M_start = __x._M_finish = __x._M_end_of_storage = pointer(); } |
108 | #endif |
109 | |
110 | _GLIBCXX20_CONSTEXPR |
111 | void |
112 | _M_copy_data(_Vector_impl_data const& __x) _GLIBCXX_NOEXCEPT |
113 | { |
114 | _M_start = __x._M_start; |
115 | _M_finish = __x._M_finish; |
116 | _M_end_of_storage = __x._M_end_of_storage; |
117 | } |
118 | |
119 | _GLIBCXX20_CONSTEXPR |
120 | void |
121 | _M_swap_data(_Vector_impl_data& __x) _GLIBCXX_NOEXCEPT |
122 | { |
123 | // Do not use std::swap(_M_start, __x._M_start), etc as it loses |
124 | // information used by TBAA. |
125 | _Vector_impl_data __tmp; |
126 | __tmp._M_copy_data(*this); |
127 | _M_copy_data(__x); |
128 | __x._M_copy_data(__tmp); |
129 | } |
130 | }; |
131 | |
132 | struct _Vector_impl |
133 | : public _Tp_alloc_type, public _Vector_impl_data |
134 | { |
135 | _GLIBCXX20_CONSTEXPR |
136 | _Vector_impl() _GLIBCXX_NOEXCEPT_IF( |
137 | is_nothrow_default_constructible<_Tp_alloc_type>::value) |
138 | #if __cpp_lib_concepts |
139 | requires is_default_constructible_v<_Tp_alloc_type> |
140 | #endif |
141 | : _Tp_alloc_type() |
142 | { } |
143 | |
144 | _GLIBCXX20_CONSTEXPR |
145 | _Vector_impl(_Tp_alloc_type const& __a) _GLIBCXX_NOEXCEPT |
146 | : _Tp_alloc_type(__a) |
147 | { } |
148 | |
149 | #if __cplusplus >= 201103L |
150 | // Not defaulted, to enforce noexcept(true) even when |
151 | // !is_nothrow_move_constructible<_Tp_alloc_type>. |
152 | _GLIBCXX20_CONSTEXPR |
153 | _Vector_impl(_Vector_impl&& __x) noexcept |
154 | : _Tp_alloc_type(std::move(__x)), _Vector_impl_data(std::move(__x)) |
155 | { } |
156 | |
157 | _GLIBCXX20_CONSTEXPR |
158 | _Vector_impl(_Tp_alloc_type&& __a) noexcept |
159 | : _Tp_alloc_type(std::move(__a)) |
160 | { } |
161 | |
162 | _GLIBCXX20_CONSTEXPR |
163 | _Vector_impl(_Tp_alloc_type&& __a, _Vector_impl&& __rv) noexcept |
164 | : _Tp_alloc_type(std::move(__a)), _Vector_impl_data(std::move(__rv)) |
165 | { } |
166 | #endif |
167 | |
168 | #if _GLIBCXX_SANITIZE_STD_ALLOCATOR && _GLIBCXX_SANITIZE_VECTOR |
169 | template<typename = _Tp_alloc_type> |
170 | struct _Asan |
171 | { |
172 | typedef typename __gnu_cxx::__alloc_traits<_Tp_alloc_type> |
173 | ::size_type size_type; |
174 | |
175 | static _GLIBCXX20_CONSTEXPR void |
176 | _S_shrink(_Vector_impl&, size_type) { } |
177 | static _GLIBCXX20_CONSTEXPR void |
178 | _S_on_dealloc(_Vector_impl&) { } |
179 | |
180 | typedef _Vector_impl& _Reinit; |
181 | |
182 | struct _Grow |
183 | { |
184 | _GLIBCXX20_CONSTEXPR _Grow(_Vector_impl&, size_type) { } |
185 | _GLIBCXX20_CONSTEXPR void _M_grew(size_type) { } |
186 | }; |
187 | }; |
188 | |
189 | // Enable ASan annotations for memory obtained from std::allocator. |
190 | template<typename _Up> |
191 | struct _Asan<allocator<_Up> > |
192 | { |
193 | typedef typename __gnu_cxx::__alloc_traits<_Tp_alloc_type> |
194 | ::size_type size_type; |
195 | |
196 | // Adjust ASan annotation for [_M_start, _M_end_of_storage) to |
197 | // mark end of valid region as __curr instead of __prev. |
198 | static _GLIBCXX20_CONSTEXPR void |
199 | _S_adjust(_Vector_impl& __impl, pointer __prev, pointer __curr) |
200 | { |
201 | #if __cpp_lib_is_constant_evaluated |
202 | if (std::is_constant_evaluated()) |
203 | return; |
204 | #endif |
205 | __sanitizer_annotate_contiguous_container(__impl._M_start, |
206 | __impl._M_end_of_storage, __prev, __curr); |
207 | } |
208 | |
209 | static _GLIBCXX20_CONSTEXPR void |
210 | _S_grow(_Vector_impl& __impl, size_type __n) |
211 | { _S_adjust(__impl, __impl._M_finish, __impl._M_finish + __n); } |
212 | |
213 | static _GLIBCXX20_CONSTEXPR void |
214 | _S_shrink(_Vector_impl& __impl, size_type __n) |
215 | { _S_adjust(__impl, __impl._M_finish + __n, __impl._M_finish); } |
216 | |
217 | static _GLIBCXX20_CONSTEXPR void |
218 | _S_on_dealloc(_Vector_impl& __impl) |
219 | { |
220 | if (__impl._M_start) |
221 | _S_adjust(__impl, __impl._M_finish, __impl._M_end_of_storage); |
222 | } |
223 | |
224 | // Used on reallocation to tell ASan unused capacity is invalid. |
225 | struct _Reinit |
226 | { |
227 | explicit _GLIBCXX20_CONSTEXPR |
228 | _Reinit(_Vector_impl& __impl) : _M_impl(__impl) |
229 | { |
230 | // Mark unused capacity as valid again before deallocating it. |
231 | _S_on_dealloc(_M_impl); |
232 | } |
233 | |
234 | _GLIBCXX20_CONSTEXPR |
235 | ~_Reinit() |
236 | { |
237 | // Mark unused capacity as invalid after reallocation. |
238 | if (_M_impl._M_start) |
239 | _S_adjust(_M_impl, _M_impl._M_end_of_storage, |
240 | _M_impl._M_finish); |
241 | } |
242 | |
243 | _Vector_impl& _M_impl; |
244 | |
245 | #if __cplusplus >= 201103L |
246 | _Reinit(const _Reinit&) = delete; |
247 | _Reinit& operator=(const _Reinit&) = delete; |
248 | #endif |
249 | }; |
250 | |
251 | // Tell ASan when unused capacity is initialized to be valid. |
252 | struct _Grow |
253 | { |
254 | _GLIBCXX20_CONSTEXPR |
255 | _Grow(_Vector_impl& __impl, size_type __n) |
256 | : _M_impl(__impl), _M_n(__n) |
257 | { _S_grow(_M_impl, __n); } |
258 | |
259 | _GLIBCXX20_CONSTEXPR |
260 | ~_Grow() { if (_M_n) _S_shrink(_M_impl, _M_n); } |
261 | |
262 | _GLIBCXX20_CONSTEXPR |
263 | void _M_grew(size_type __n) { _M_n -= __n; } |
264 | |
265 | #if __cplusplus >= 201103L |
266 | _Grow(const _Grow&) = delete; |
267 | _Grow& operator=(const _Grow&) = delete; |
268 | #endif |
269 | private: |
270 | _Vector_impl& _M_impl; |
271 | size_type _M_n; |
272 | }; |
273 | }; |
274 | |
275 | #define _GLIBCXX_ASAN_ANNOTATE_REINIT \ |
276 | typename _Base::_Vector_impl::template _Asan<>::_Reinit const \ |
277 | __attribute__((__unused__)) __reinit_guard(this->_M_impl) |
278 | #define _GLIBCXX_ASAN_ANNOTATE_GROW(n) \ |
279 | typename _Base::_Vector_impl::template _Asan<>::_Grow \ |
280 | __attribute__((__unused__)) __grow_guard(this->_M_impl, (n)) |
281 | #define _GLIBCXX_ASAN_ANNOTATE_GREW(n) __grow_guard._M_grew(n) |
282 | #define _GLIBCXX_ASAN_ANNOTATE_SHRINK(n) \ |
283 | _Base::_Vector_impl::template _Asan<>::_S_shrink(this->_M_impl, n) |
284 | #define _GLIBCXX_ASAN_ANNOTATE_BEFORE_DEALLOC \ |
285 | _Base::_Vector_impl::template _Asan<>::_S_on_dealloc(this->_M_impl) |
286 | #else // ! (_GLIBCXX_SANITIZE_STD_ALLOCATOR && _GLIBCXX_SANITIZE_VECTOR) |
287 | #define _GLIBCXX_ASAN_ANNOTATE_REINIT |
288 | #define _GLIBCXX_ASAN_ANNOTATE_GROW(n) |
289 | #define _GLIBCXX_ASAN_ANNOTATE_GREW(n) |
290 | #define _GLIBCXX_ASAN_ANNOTATE_SHRINK(n) |
291 | #define _GLIBCXX_ASAN_ANNOTATE_BEFORE_DEALLOC |
292 | #endif // _GLIBCXX_SANITIZE_STD_ALLOCATOR && _GLIBCXX_SANITIZE_VECTOR |
293 | }; |
294 | |
295 | public: |
296 | typedef _Alloc allocator_type; |
297 | |
298 | _GLIBCXX20_CONSTEXPR |
299 | _Tp_alloc_type& |
300 | _M_get_Tp_allocator() _GLIBCXX_NOEXCEPT |
301 | { return this->_M_impl; } |
302 | |
303 | _GLIBCXX20_CONSTEXPR |
304 | const _Tp_alloc_type& |
305 | _M_get_Tp_allocator() const _GLIBCXX_NOEXCEPT |
306 | { return this->_M_impl; } |
307 | |
308 | _GLIBCXX20_CONSTEXPR |
309 | allocator_type |
310 | get_allocator() const _GLIBCXX_NOEXCEPT |
311 | { return allocator_type(_M_get_Tp_allocator()); } |
312 | |
313 | #if __cplusplus >= 201103L |
314 | _Vector_base() = default; |
315 | #else |
316 | _Vector_base() { } |
317 | #endif |
318 | |
319 | _GLIBCXX20_CONSTEXPR |
320 | _Vector_base(const allocator_type& __a) _GLIBCXX_NOEXCEPT |
321 | : _M_impl(__a) { } |
322 | |
323 | // Kept for ABI compatibility. |
324 | #if !_GLIBCXX_INLINE_VERSION |
325 | _GLIBCXX20_CONSTEXPR |
326 | _Vector_base(size_t __n) |
327 | : _M_impl() |
328 | { _M_create_storage(__n); } |
329 | #endif |
330 | |
331 | _GLIBCXX20_CONSTEXPR |
332 | _Vector_base(size_t __n, const allocator_type& __a) |
333 | : _M_impl(__a) |
334 | { _M_create_storage(__n); } |
335 | |
336 | #if __cplusplus >= 201103L |
337 | _Vector_base(_Vector_base&&) = default; |
338 | |
339 | // Kept for ABI compatibility. |
340 | # if !_GLIBCXX_INLINE_VERSION |
341 | _GLIBCXX20_CONSTEXPR |
342 | _Vector_base(_Tp_alloc_type&& __a) noexcept |
343 | : _M_impl(std::move(__a)) { } |
344 | |
345 | _GLIBCXX20_CONSTEXPR |
346 | _Vector_base(_Vector_base&& __x, const allocator_type& __a) |
347 | : _M_impl(__a) |
348 | { |
349 | if (__x.get_allocator() == __a) |
350 | this->_M_impl._M_swap_data(__x._M_impl); |
351 | else |
352 | { |
353 | size_t __n = __x._M_impl._M_finish - __x._M_impl._M_start; |
354 | _M_create_storage(__n); |
355 | } |
356 | } |
357 | # endif |
358 | |
359 | _GLIBCXX20_CONSTEXPR |
360 | _Vector_base(const allocator_type& __a, _Vector_base&& __x) |
361 | : _M_impl(_Tp_alloc_type(__a), std::move(__x._M_impl)) |
362 | { } |
363 | #endif |
364 | |
365 | _GLIBCXX20_CONSTEXPR |
366 | ~_Vector_base() _GLIBCXX_NOEXCEPT |
367 | { |
368 | _M_deallocate(p: _M_impl._M_start, |
369 | n: _M_impl._M_end_of_storage - _M_impl._M_start); |
370 | } |
371 | |
372 | public: |
373 | _Vector_impl _M_impl; |
374 | |
375 | _GLIBCXX20_CONSTEXPR |
376 | pointer |
377 | _M_allocate(size_t __n) |
378 | { |
379 | typedef __gnu_cxx::__alloc_traits<_Tp_alloc_type> _Tr; |
380 | return __n != 0 ? _Tr::allocate(_M_impl, __n) : pointer(); |
381 | } |
382 | |
383 | _GLIBCXX20_CONSTEXPR |
384 | void |
385 | _M_deallocate(pointer __p, size_t __n) |
386 | { |
387 | typedef __gnu_cxx::__alloc_traits<_Tp_alloc_type> _Tr; |
388 | if (__p) |
389 | _Tr::deallocate(_M_impl, __p, __n); |
390 | } |
391 | |
392 | protected: |
393 | |
394 | _GLIBCXX20_CONSTEXPR |
395 | void |
396 | _M_create_storage(size_t __n) |
397 | { |
398 | this->_M_impl._M_start = this->_M_allocate(__n); |
399 | this->_M_impl._M_finish = this->_M_impl._M_start; |
400 | this->_M_impl._M_end_of_storage = this->_M_impl._M_start + __n; |
401 | } |
402 | }; |
403 | |
404 | /** |
405 | * @brief A standard container which offers fixed time access to |
406 | * individual elements in any order. |
407 | * |
408 | * @ingroup sequences |
409 | * @headerfile vector |
410 | * @since C++98 |
411 | * |
412 | * @tparam _Tp Type of element. |
413 | * @tparam _Alloc Allocator type, defaults to allocator<_Tp>. |
414 | * |
415 | * Meets the requirements of a <a href="tables.html#65">container</a>, a |
416 | * <a href="tables.html#66">reversible container</a>, and a |
417 | * <a href="tables.html#67">sequence</a>, including the |
418 | * <a href="tables.html#68">optional sequence requirements</a> with the |
419 | * %exception of @c push_front and @c pop_front. |
420 | * |
421 | * In some terminology a %vector can be described as a dynamic |
422 | * C-style array, it offers fast and efficient access to individual |
423 | * elements in any order and saves the user from worrying about |
424 | * memory and size allocation. Subscripting ( @c [] ) access is |
425 | * also provided as with C-style arrays. |
426 | */ |
427 | template<typename _Tp, typename _Alloc = std::allocator<_Tp> > |
428 | class vector : protected _Vector_base<_Tp, _Alloc> |
429 | { |
430 | #ifdef _GLIBCXX_CONCEPT_CHECKS |
431 | // Concept requirements. |
432 | typedef typename _Alloc::value_type _Alloc_value_type; |
433 | # if __cplusplus < 201103L |
434 | __glibcxx_class_requires(_Tp, _SGIAssignableConcept) |
435 | # endif |
436 | __glibcxx_class_requires2(_Tp, _Alloc_value_type, _SameTypeConcept) |
437 | #endif |
438 | |
439 | #if __cplusplus >= 201103L |
440 | static_assert(is_same<typename remove_cv<_Tp>::type, _Tp>::value, |
441 | "std::vector must have a non-const, non-volatile value_type" ); |
442 | # if __cplusplus > 201703L || defined __STRICT_ANSI__ |
443 | static_assert(is_same<typename _Alloc::value_type, _Tp>::value, |
444 | "std::vector must have the same value_type as its allocator" ); |
445 | # endif |
446 | #endif |
447 | |
448 | typedef _Vector_base<_Tp, _Alloc> _Base; |
449 | typedef typename _Base::_Tp_alloc_type _Tp_alloc_type; |
450 | typedef __gnu_cxx::__alloc_traits<_Tp_alloc_type> _Alloc_traits; |
451 | |
452 | public: |
453 | typedef _Tp value_type; |
454 | typedef typename _Base::pointer pointer; |
455 | typedef typename _Alloc_traits::const_pointer const_pointer; |
456 | typedef typename _Alloc_traits::reference reference; |
457 | typedef typename _Alloc_traits::const_reference const_reference; |
458 | typedef __gnu_cxx::__normal_iterator<pointer, vector> iterator; |
459 | typedef __gnu_cxx::__normal_iterator<const_pointer, vector> |
460 | const_iterator; |
461 | typedef std::reverse_iterator<const_iterator> const_reverse_iterator; |
462 | typedef std::reverse_iterator<iterator> reverse_iterator; |
463 | typedef size_t size_type; |
464 | typedef ptrdiff_t difference_type; |
465 | typedef _Alloc allocator_type; |
466 | |
467 | private: |
468 | #if __cplusplus >= 201103L |
469 | static constexpr bool |
470 | _S_nothrow_relocate(true_type) |
471 | { |
472 | return noexcept(std::__relocate_a(std::declval<pointer>(), |
473 | std::declval<pointer>(), |
474 | std::declval<pointer>(), |
475 | std::declval<_Tp_alloc_type&>())); |
476 | } |
477 | |
478 | static constexpr bool |
479 | _S_nothrow_relocate(false_type) |
480 | { return false; } |
481 | |
482 | static constexpr bool |
483 | _S_use_relocate() |
484 | { |
485 | // Instantiating std::__relocate_a might cause an error outside the |
486 | // immediate context (in __relocate_object_a's noexcept-specifier), |
487 | // so only do it if we know the type can be move-inserted into *this. |
488 | return _S_nothrow_relocate(__is_move_insertable<_Tp_alloc_type>{}); |
489 | } |
490 | |
491 | static pointer |
492 | _S_do_relocate(pointer __first, pointer __last, pointer __result, |
493 | _Tp_alloc_type& __alloc, true_type) noexcept |
494 | { |
495 | return std::__relocate_a(__first, __last, __result, __alloc); |
496 | } |
497 | |
498 | static pointer |
499 | _S_do_relocate(pointer, pointer, pointer __result, |
500 | _Tp_alloc_type&, false_type) noexcept |
501 | { return __result; } |
502 | |
503 | static _GLIBCXX20_CONSTEXPR pointer |
504 | _S_relocate(pointer __first, pointer __last, pointer __result, |
505 | _Tp_alloc_type& __alloc) noexcept |
506 | { |
507 | #if __cpp_if_constexpr |
508 | // All callers have already checked _S_use_relocate() so just do it. |
509 | return std::__relocate_a(__first, __last, __result, __alloc); |
510 | #else |
511 | using __do_it = __bool_constant<_S_use_relocate()>; |
512 | return _S_do_relocate(__first, __last, __result, __alloc, __do_it{}); |
513 | #endif |
514 | } |
515 | #endif // C++11 |
516 | |
517 | protected: |
518 | using _Base::_M_allocate; |
519 | using _Base::_M_deallocate; |
520 | using _Base::_M_impl; |
521 | using _Base::_M_get_Tp_allocator; |
522 | |
523 | public: |
524 | // [23.2.4.1] construct/copy/destroy |
525 | // (assign() and get_allocator() are also listed in this section) |
526 | |
527 | /** |
528 | * @brief Creates a %vector with no elements. |
529 | */ |
530 | #if __cplusplus >= 201103L |
531 | vector() = default; |
532 | #else |
533 | vector() { } |
534 | #endif |
535 | |
536 | /** |
537 | * @brief Creates a %vector with no elements. |
538 | * @param __a An allocator object. |
539 | */ |
540 | explicit |
541 | _GLIBCXX20_CONSTEXPR |
542 | vector(const allocator_type& __a) _GLIBCXX_NOEXCEPT |
543 | : _Base(__a) { } |
544 | |
545 | #if __cplusplus >= 201103L |
546 | /** |
547 | * @brief Creates a %vector with default constructed elements. |
548 | * @param __n The number of elements to initially create. |
549 | * @param __a An allocator. |
550 | * |
551 | * This constructor fills the %vector with @a __n default |
552 | * constructed elements. |
553 | */ |
554 | explicit |
555 | _GLIBCXX20_CONSTEXPR |
556 | vector(size_type __n, const allocator_type& __a = allocator_type()) |
557 | : _Base(_S_check_init_len(__n, __a), __a) |
558 | { _M_default_initialize(__n); } |
559 | |
560 | /** |
561 | * @brief Creates a %vector with copies of an exemplar element. |
562 | * @param __n The number of elements to initially create. |
563 | * @param __value An element to copy. |
564 | * @param __a An allocator. |
565 | * |
566 | * This constructor fills the %vector with @a __n copies of @a __value. |
567 | */ |
568 | _GLIBCXX20_CONSTEXPR |
569 | vector(size_type __n, const value_type& __value, |
570 | const allocator_type& __a = allocator_type()) |
571 | : _Base(_S_check_init_len(__n, __a), __a) |
572 | { _M_fill_initialize(__n, __value); } |
573 | #else |
574 | /** |
575 | * @brief Creates a %vector with copies of an exemplar element. |
576 | * @param __n The number of elements to initially create. |
577 | * @param __value An element to copy. |
578 | * @param __a An allocator. |
579 | * |
580 | * This constructor fills the %vector with @a __n copies of @a __value. |
581 | */ |
582 | explicit |
583 | vector(size_type __n, const value_type& __value = value_type(), |
584 | const allocator_type& __a = allocator_type()) |
585 | : _Base(_S_check_init_len(__n, __a), __a) |
586 | { _M_fill_initialize(__n, __value); } |
587 | #endif |
588 | |
589 | /** |
590 | * @brief %Vector copy constructor. |
591 | * @param __x A %vector of identical element and allocator types. |
592 | * |
593 | * All the elements of @a __x are copied, but any unused capacity in |
594 | * @a __x will not be copied |
595 | * (i.e. capacity() == size() in the new %vector). |
596 | * |
597 | * The newly-created %vector uses a copy of the allocator object used |
598 | * by @a __x (unless the allocator traits dictate a different object). |
599 | */ |
600 | _GLIBCXX20_CONSTEXPR |
601 | vector(const vector& __x) |
602 | : _Base(__x.size(), |
603 | _Alloc_traits::_S_select_on_copy(__x._M_get_Tp_allocator())) |
604 | { |
605 | this->_M_impl._M_finish = |
606 | std::__uninitialized_copy_a(__x.begin(), __x.end(), |
607 | this->_M_impl._M_start, |
608 | _M_get_Tp_allocator()); |
609 | } |
610 | |
611 | #if __cplusplus >= 201103L |
612 | /** |
613 | * @brief %Vector move constructor. |
614 | * |
615 | * The newly-created %vector contains the exact contents of the |
616 | * moved instance. |
617 | * The contents of the moved instance are a valid, but unspecified |
618 | * %vector. |
619 | */ |
620 | vector(vector&&) noexcept = default; |
621 | |
622 | /// Copy constructor with alternative allocator |
623 | _GLIBCXX20_CONSTEXPR |
624 | vector(const vector& __x, const __type_identity_t<allocator_type>& __a) |
625 | : _Base(__x.size(), __a) |
626 | { |
627 | this->_M_impl._M_finish = |
628 | std::__uninitialized_copy_a(__x.begin(), __x.end(), |
629 | this->_M_impl._M_start, |
630 | _M_get_Tp_allocator()); |
631 | } |
632 | |
633 | private: |
634 | _GLIBCXX20_CONSTEXPR |
635 | vector(vector&& __rv, const allocator_type& __m, true_type) noexcept |
636 | : _Base(__m, std::move(__rv)) |
637 | { } |
638 | |
639 | _GLIBCXX20_CONSTEXPR |
640 | vector(vector&& __rv, const allocator_type& __m, false_type) |
641 | : _Base(__m) |
642 | { |
643 | if (__rv.get_allocator() == __m) |
644 | this->_M_impl._M_swap_data(__rv._M_impl); |
645 | else if (!__rv.empty()) |
646 | { |
647 | this->_M_create_storage(__rv.size()); |
648 | this->_M_impl._M_finish = |
649 | std::__uninitialized_move_a(__rv.begin(), __rv.end(), |
650 | this->_M_impl._M_start, |
651 | _M_get_Tp_allocator()); |
652 | __rv.clear(); |
653 | } |
654 | } |
655 | |
656 | public: |
657 | /// Move constructor with alternative allocator |
658 | _GLIBCXX20_CONSTEXPR |
659 | vector(vector&& __rv, const __type_identity_t<allocator_type>& __m) |
660 | noexcept( noexcept( |
661 | vector(std::declval<vector&&>(), std::declval<const allocator_type&>(), |
662 | std::declval<typename _Alloc_traits::is_always_equal>())) ) |
663 | : vector(std::move(__rv), __m, typename _Alloc_traits::is_always_equal{}) |
664 | { } |
665 | |
666 | /** |
667 | * @brief Builds a %vector from an initializer list. |
668 | * @param __l An initializer_list. |
669 | * @param __a An allocator. |
670 | * |
671 | * Create a %vector consisting of copies of the elements in the |
672 | * initializer_list @a __l. |
673 | * |
674 | * This will call the element type's copy constructor N times |
675 | * (where N is @a __l.size()) and do no memory reallocation. |
676 | */ |
677 | _GLIBCXX20_CONSTEXPR |
678 | vector(initializer_list<value_type> __l, |
679 | const allocator_type& __a = allocator_type()) |
680 | : _Base(__a) |
681 | { |
682 | _M_range_initialize(__l.begin(), __l.end(), |
683 | random_access_iterator_tag()); |
684 | } |
685 | #endif |
686 | |
687 | /** |
688 | * @brief Builds a %vector from a range. |
689 | * @param __first An input iterator. |
690 | * @param __last An input iterator. |
691 | * @param __a An allocator. |
692 | * |
693 | * Create a %vector consisting of copies of the elements from |
694 | * [first,last). |
695 | * |
696 | * If the iterators are forward, bidirectional, or |
697 | * random-access, then this will call the elements' copy |
698 | * constructor N times (where N is distance(first,last)) and do |
699 | * no memory reallocation. But if only input iterators are |
700 | * used, then this will do at most 2N calls to the copy |
701 | * constructor, and logN memory reallocations. |
702 | */ |
703 | #if __cplusplus >= 201103L |
704 | template<typename _InputIterator, |
705 | typename = std::_RequireInputIter<_InputIterator>> |
706 | _GLIBCXX20_CONSTEXPR |
707 | vector(_InputIterator __first, _InputIterator __last, |
708 | const allocator_type& __a = allocator_type()) |
709 | : _Base(__a) |
710 | { |
711 | _M_range_initialize(__first, __last, |
712 | std::__iterator_category(__first)); |
713 | } |
714 | #else |
715 | template<typename _InputIterator> |
716 | vector(_InputIterator __first, _InputIterator __last, |
717 | const allocator_type& __a = allocator_type()) |
718 | : _Base(__a) |
719 | { |
720 | // Check whether it's an integral type. If so, it's not an iterator. |
721 | typedef typename std::__is_integer<_InputIterator>::__type _Integral; |
722 | _M_initialize_dispatch(__first, __last, _Integral()); |
723 | } |
724 | #endif |
725 | |
726 | /** |
727 | * The dtor only erases the elements, and note that if the |
728 | * elements themselves are pointers, the pointed-to memory is |
729 | * not touched in any way. Managing the pointer is the user's |
730 | * responsibility. |
731 | */ |
732 | _GLIBCXX20_CONSTEXPR |
733 | ~vector() _GLIBCXX_NOEXCEPT |
734 | { |
735 | std::_Destroy(this->_M_impl._M_start, this->_M_impl._M_finish, |
736 | _M_get_Tp_allocator()); |
737 | _GLIBCXX_ASAN_ANNOTATE_BEFORE_DEALLOC; |
738 | } |
739 | |
740 | /** |
741 | * @brief %Vector assignment operator. |
742 | * @param __x A %vector of identical element and allocator types. |
743 | * |
744 | * All the elements of @a __x are copied, but any unused capacity in |
745 | * @a __x will not be copied. |
746 | * |
747 | * Whether the allocator is copied depends on the allocator traits. |
748 | */ |
749 | _GLIBCXX20_CONSTEXPR |
750 | vector& |
751 | operator=(const vector& __x); |
752 | |
753 | #if __cplusplus >= 201103L |
754 | /** |
755 | * @brief %Vector move assignment operator. |
756 | * @param __x A %vector of identical element and allocator types. |
757 | * |
758 | * The contents of @a __x are moved into this %vector (without copying, |
759 | * if the allocators permit it). |
760 | * Afterwards @a __x is a valid, but unspecified %vector. |
761 | * |
762 | * Whether the allocator is moved depends on the allocator traits. |
763 | */ |
764 | _GLIBCXX20_CONSTEXPR |
765 | vector& |
766 | operator=(vector&& __x) noexcept(_Alloc_traits::_S_nothrow_move()) |
767 | { |
768 | constexpr bool __move_storage = |
769 | _Alloc_traits::_S_propagate_on_move_assign() |
770 | || _Alloc_traits::_S_always_equal(); |
771 | _M_move_assign(std::move(__x), __bool_constant<__move_storage>()); |
772 | return *this; |
773 | } |
774 | |
775 | /** |
776 | * @brief %Vector list assignment operator. |
777 | * @param __l An initializer_list. |
778 | * |
779 | * This function fills a %vector with copies of the elements in the |
780 | * initializer list @a __l. |
781 | * |
782 | * Note that the assignment completely changes the %vector and |
783 | * that the resulting %vector's size is the same as the number |
784 | * of elements assigned. |
785 | */ |
786 | _GLIBCXX20_CONSTEXPR |
787 | vector& |
788 | operator=(initializer_list<value_type> __l) |
789 | { |
790 | this->_M_assign_aux(__l.begin(), __l.end(), |
791 | random_access_iterator_tag()); |
792 | return *this; |
793 | } |
794 | #endif |
795 | |
796 | /** |
797 | * @brief Assigns a given value to a %vector. |
798 | * @param __n Number of elements to be assigned. |
799 | * @param __val Value to be assigned. |
800 | * |
801 | * This function fills a %vector with @a __n copies of the given |
802 | * value. Note that the assignment completely changes the |
803 | * %vector and that the resulting %vector's size is the same as |
804 | * the number of elements assigned. |
805 | */ |
806 | _GLIBCXX20_CONSTEXPR |
807 | void |
808 | assign(size_type __n, const value_type& __val) |
809 | { _M_fill_assign(__n, __val); } |
810 | |
811 | /** |
812 | * @brief Assigns a range to a %vector. |
813 | * @param __first An input iterator. |
814 | * @param __last An input iterator. |
815 | * |
816 | * This function fills a %vector with copies of the elements in the |
817 | * range [__first,__last). |
818 | * |
819 | * Note that the assignment completely changes the %vector and |
820 | * that the resulting %vector's size is the same as the number |
821 | * of elements assigned. |
822 | */ |
823 | #if __cplusplus >= 201103L |
824 | template<typename _InputIterator, |
825 | typename = std::_RequireInputIter<_InputIterator>> |
826 | _GLIBCXX20_CONSTEXPR |
827 | void |
828 | assign(_InputIterator __first, _InputIterator __last) |
829 | { _M_assign_aux(__first, __last, std::__iterator_category(__first)); } |
830 | #else |
831 | template<typename _InputIterator> |
832 | void |
833 | assign(_InputIterator __first, _InputIterator __last) |
834 | { |
835 | // Check whether it's an integral type. If so, it's not an iterator. |
836 | typedef typename std::__is_integer<_InputIterator>::__type _Integral; |
837 | _M_assign_dispatch(__first, __last, _Integral()); |
838 | } |
839 | #endif |
840 | |
841 | #if __cplusplus >= 201103L |
842 | /** |
843 | * @brief Assigns an initializer list to a %vector. |
844 | * @param __l An initializer_list. |
845 | * |
846 | * This function fills a %vector with copies of the elements in the |
847 | * initializer list @a __l. |
848 | * |
849 | * Note that the assignment completely changes the %vector and |
850 | * that the resulting %vector's size is the same as the number |
851 | * of elements assigned. |
852 | */ |
853 | _GLIBCXX20_CONSTEXPR |
854 | void |
855 | assign(initializer_list<value_type> __l) |
856 | { |
857 | this->_M_assign_aux(__l.begin(), __l.end(), |
858 | random_access_iterator_tag()); |
859 | } |
860 | #endif |
861 | |
862 | /// Get a copy of the memory allocation object. |
863 | using _Base::get_allocator; |
864 | |
865 | // iterators |
866 | /** |
867 | * Returns a read/write iterator that points to the first |
868 | * element in the %vector. Iteration is done in ordinary |
869 | * element order. |
870 | */ |
871 | _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR |
872 | iterator |
873 | begin() _GLIBCXX_NOEXCEPT |
874 | { return iterator(this->_M_impl._M_start); } |
875 | |
876 | /** |
877 | * Returns a read-only (constant) iterator that points to the |
878 | * first element in the %vector. Iteration is done in ordinary |
879 | * element order. |
880 | */ |
881 | _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR |
882 | const_iterator |
883 | begin() const _GLIBCXX_NOEXCEPT |
884 | { return const_iterator(this->_M_impl._M_start); } |
885 | |
886 | /** |
887 | * Returns a read/write iterator that points one past the last |
888 | * element in the %vector. Iteration is done in ordinary |
889 | * element order. |
890 | */ |
891 | _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR |
892 | iterator |
893 | end() _GLIBCXX_NOEXCEPT |
894 | { return iterator(this->_M_impl._M_finish); } |
895 | |
896 | /** |
897 | * Returns a read-only (constant) iterator that points one past |
898 | * the last element in the %vector. Iteration is done in |
899 | * ordinary element order. |
900 | */ |
901 | _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR |
902 | const_iterator |
903 | end() const _GLIBCXX_NOEXCEPT |
904 | { return const_iterator(this->_M_impl._M_finish); } |
905 | |
906 | /** |
907 | * Returns a read/write reverse iterator that points to the |
908 | * last element in the %vector. Iteration is done in reverse |
909 | * element order. |
910 | */ |
911 | _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR |
912 | reverse_iterator |
913 | rbegin() _GLIBCXX_NOEXCEPT |
914 | { return reverse_iterator(end()); } |
915 | |
916 | /** |
917 | * Returns a read-only (constant) reverse iterator that points |
918 | * to the last element in the %vector. Iteration is done in |
919 | * reverse element order. |
920 | */ |
921 | _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR |
922 | const_reverse_iterator |
923 | rbegin() const _GLIBCXX_NOEXCEPT |
924 | { return const_reverse_iterator(end()); } |
925 | |
926 | /** |
927 | * Returns a read/write reverse iterator that points to one |
928 | * before the first element in the %vector. Iteration is done |
929 | * in reverse element order. |
930 | */ |
931 | _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR |
932 | reverse_iterator |
933 | rend() _GLIBCXX_NOEXCEPT |
934 | { return reverse_iterator(begin()); } |
935 | |
936 | /** |
937 | * Returns a read-only (constant) reverse iterator that points |
938 | * to one before the first element in the %vector. Iteration |
939 | * is done in reverse element order. |
940 | */ |
941 | _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR |
942 | const_reverse_iterator |
943 | rend() const _GLIBCXX_NOEXCEPT |
944 | { return const_reverse_iterator(begin()); } |
945 | |
946 | #if __cplusplus >= 201103L |
947 | /** |
948 | * Returns a read-only (constant) iterator that points to the |
949 | * first element in the %vector. Iteration is done in ordinary |
950 | * element order. |
951 | */ |
952 | [[__nodiscard__]] _GLIBCXX20_CONSTEXPR |
953 | const_iterator |
954 | cbegin() const noexcept |
955 | { return const_iterator(this->_M_impl._M_start); } |
956 | |
957 | /** |
958 | * Returns a read-only (constant) iterator that points one past |
959 | * the last element in the %vector. Iteration is done in |
960 | * ordinary element order. |
961 | */ |
962 | [[__nodiscard__]] _GLIBCXX20_CONSTEXPR |
963 | const_iterator |
964 | cend() const noexcept |
965 | { return const_iterator(this->_M_impl._M_finish); } |
966 | |
967 | /** |
968 | * Returns a read-only (constant) reverse iterator that points |
969 | * to the last element in the %vector. Iteration is done in |
970 | * reverse element order. |
971 | */ |
972 | [[__nodiscard__]] _GLIBCXX20_CONSTEXPR |
973 | const_reverse_iterator |
974 | crbegin() const noexcept |
975 | { return const_reverse_iterator(end()); } |
976 | |
977 | /** |
978 | * Returns a read-only (constant) reverse iterator that points |
979 | * to one before the first element in the %vector. Iteration |
980 | * is done in reverse element order. |
981 | */ |
982 | [[__nodiscard__]] _GLIBCXX20_CONSTEXPR |
983 | const_reverse_iterator |
984 | crend() const noexcept |
985 | { return const_reverse_iterator(begin()); } |
986 | #endif |
987 | |
988 | // [23.2.4.2] capacity |
989 | /** Returns the number of elements in the %vector. */ |
990 | _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR |
991 | size_type |
992 | size() const _GLIBCXX_NOEXCEPT |
993 | { return size_type(this->_M_impl._M_finish - this->_M_impl._M_start); } |
994 | |
995 | /** Returns the size() of the largest possible %vector. */ |
996 | _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR |
997 | size_type |
998 | max_size() const _GLIBCXX_NOEXCEPT |
999 | { return _S_max_size(a: _M_get_Tp_allocator()); } |
1000 | |
1001 | #if __cplusplus >= 201103L |
1002 | /** |
1003 | * @brief Resizes the %vector to the specified number of elements. |
1004 | * @param __new_size Number of elements the %vector should contain. |
1005 | * |
1006 | * This function will %resize the %vector to the specified |
1007 | * number of elements. If the number is smaller than the |
1008 | * %vector's current size the %vector is truncated, otherwise |
1009 | * default constructed elements are appended. |
1010 | */ |
1011 | _GLIBCXX20_CONSTEXPR |
1012 | void |
1013 | resize(size_type __new_size) |
1014 | { |
1015 | if (__new_size > size()) |
1016 | _M_default_append(n: __new_size - size()); |
1017 | else if (__new_size < size()) |
1018 | _M_erase_at_end(pos: this->_M_impl._M_start + __new_size); |
1019 | } |
1020 | |
1021 | /** |
1022 | * @brief Resizes the %vector to the specified number of elements. |
1023 | * @param __new_size Number of elements the %vector should contain. |
1024 | * @param __x Data with which new elements should be populated. |
1025 | * |
1026 | * This function will %resize the %vector to the specified |
1027 | * number of elements. If the number is smaller than the |
1028 | * %vector's current size the %vector is truncated, otherwise |
1029 | * the %vector is extended and new elements are populated with |
1030 | * given data. |
1031 | */ |
1032 | _GLIBCXX20_CONSTEXPR |
1033 | void |
1034 | resize(size_type __new_size, const value_type& __x) |
1035 | { |
1036 | if (__new_size > size()) |
1037 | _M_fill_insert(pos: end(), n: __new_size - size(), __x); |
1038 | else if (__new_size < size()) |
1039 | _M_erase_at_end(pos: this->_M_impl._M_start + __new_size); |
1040 | } |
1041 | #else |
1042 | /** |
1043 | * @brief Resizes the %vector to the specified number of elements. |
1044 | * @param __new_size Number of elements the %vector should contain. |
1045 | * @param __x Data with which new elements should be populated. |
1046 | * |
1047 | * This function will %resize the %vector to the specified |
1048 | * number of elements. If the number is smaller than the |
1049 | * %vector's current size the %vector is truncated, otherwise |
1050 | * the %vector is extended and new elements are populated with |
1051 | * given data. |
1052 | */ |
1053 | _GLIBCXX20_CONSTEXPR |
1054 | void |
1055 | resize(size_type __new_size, value_type __x = value_type()) |
1056 | { |
1057 | if (__new_size > size()) |
1058 | _M_fill_insert(end(), __new_size - size(), __x); |
1059 | else if (__new_size < size()) |
1060 | _M_erase_at_end(this->_M_impl._M_start + __new_size); |
1061 | } |
1062 | #endif |
1063 | |
1064 | #if __cplusplus >= 201103L |
1065 | /** A non-binding request to reduce capacity() to size(). */ |
1066 | _GLIBCXX20_CONSTEXPR |
1067 | void |
1068 | shrink_to_fit() |
1069 | { _M_shrink_to_fit(); } |
1070 | #endif |
1071 | |
1072 | /** |
1073 | * Returns the total number of elements that the %vector can |
1074 | * hold before needing to allocate more memory. |
1075 | */ |
1076 | _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR |
1077 | size_type |
1078 | capacity() const _GLIBCXX_NOEXCEPT |
1079 | { |
1080 | return size_type(this->_M_impl._M_end_of_storage |
1081 | - this->_M_impl._M_start); |
1082 | } |
1083 | |
1084 | /** |
1085 | * Returns true if the %vector is empty. (Thus begin() would |
1086 | * equal end().) |
1087 | */ |
1088 | _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR |
1089 | bool |
1090 | empty() const _GLIBCXX_NOEXCEPT |
1091 | { return begin() == end(); } |
1092 | |
1093 | /** |
1094 | * @brief Attempt to preallocate enough memory for specified number of |
1095 | * elements. |
1096 | * @param __n Number of elements required. |
1097 | * @throw std::length_error If @a n exceeds @c max_size(). |
1098 | * |
1099 | * This function attempts to reserve enough memory for the |
1100 | * %vector to hold the specified number of elements. If the |
1101 | * number requested is more than max_size(), length_error is |
1102 | * thrown. |
1103 | * |
1104 | * The advantage of this function is that if optimal code is a |
1105 | * necessity and the user can determine the number of elements |
1106 | * that will be required, the user can reserve the memory in |
1107 | * %advance, and thus prevent a possible reallocation of memory |
1108 | * and copying of %vector data. |
1109 | */ |
1110 | _GLIBCXX20_CONSTEXPR |
1111 | void |
1112 | reserve(size_type __n); |
1113 | |
1114 | // element access |
1115 | /** |
1116 | * @brief Subscript access to the data contained in the %vector. |
1117 | * @param __n The index of the element for which data should be |
1118 | * accessed. |
1119 | * @return Read/write reference to data. |
1120 | * |
1121 | * This operator allows for easy, array-style, data access. |
1122 | * Note that data access with this operator is unchecked and |
1123 | * out_of_range lookups are not defined. (For checked lookups |
1124 | * see at().) |
1125 | */ |
1126 | _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR |
1127 | reference |
1128 | operator[](size_type __n) _GLIBCXX_NOEXCEPT |
1129 | { |
1130 | __glibcxx_requires_subscript(__n); |
1131 | return *(this->_M_impl._M_start + __n); |
1132 | } |
1133 | |
1134 | /** |
1135 | * @brief Subscript access to the data contained in the %vector. |
1136 | * @param __n The index of the element for which data should be |
1137 | * accessed. |
1138 | * @return Read-only (constant) reference to data. |
1139 | * |
1140 | * This operator allows for easy, array-style, data access. |
1141 | * Note that data access with this operator is unchecked and |
1142 | * out_of_range lookups are not defined. (For checked lookups |
1143 | * see at().) |
1144 | */ |
1145 | _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR |
1146 | const_reference |
1147 | operator[](size_type __n) const _GLIBCXX_NOEXCEPT |
1148 | { |
1149 | __glibcxx_requires_subscript(__n); |
1150 | return *(this->_M_impl._M_start + __n); |
1151 | } |
1152 | |
1153 | protected: |
1154 | /// Safety check used only from at(). |
1155 | _GLIBCXX20_CONSTEXPR |
1156 | void |
1157 | _M_range_check(size_type __n) const |
1158 | { |
1159 | if (__n >= this->size()) |
1160 | __throw_out_of_range_fmt(__N("vector::_M_range_check: __n " |
1161 | "(which is %zu) >= this->size() " |
1162 | "(which is %zu)" ), |
1163 | __n, this->size()); |
1164 | } |
1165 | |
1166 | public: |
1167 | /** |
1168 | * @brief Provides access to the data contained in the %vector. |
1169 | * @param __n The index of the element for which data should be |
1170 | * accessed. |
1171 | * @return Read/write reference to data. |
1172 | * @throw std::out_of_range If @a __n is an invalid index. |
1173 | * |
1174 | * This function provides for safer data access. The parameter |
1175 | * is first checked that it is in the range of the vector. The |
1176 | * function throws out_of_range if the check fails. |
1177 | */ |
1178 | _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR |
1179 | reference |
1180 | at(size_type __n) |
1181 | { |
1182 | _M_range_check(__n); |
1183 | return (*this)[__n]; |
1184 | } |
1185 | |
1186 | /** |
1187 | * @brief Provides access to the data contained in the %vector. |
1188 | * @param __n The index of the element for which data should be |
1189 | * accessed. |
1190 | * @return Read-only (constant) reference to data. |
1191 | * @throw std::out_of_range If @a __n is an invalid index. |
1192 | * |
1193 | * This function provides for safer data access. The parameter |
1194 | * is first checked that it is in the range of the vector. The |
1195 | * function throws out_of_range if the check fails. |
1196 | */ |
1197 | _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR |
1198 | const_reference |
1199 | at(size_type __n) const |
1200 | { |
1201 | _M_range_check(__n); |
1202 | return (*this)[__n]; |
1203 | } |
1204 | |
1205 | /** |
1206 | * Returns a read/write reference to the data at the first |
1207 | * element of the %vector. |
1208 | */ |
1209 | _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR |
1210 | reference |
1211 | front() _GLIBCXX_NOEXCEPT |
1212 | { |
1213 | __glibcxx_requires_nonempty(); |
1214 | return *begin(); |
1215 | } |
1216 | |
1217 | /** |
1218 | * Returns a read-only (constant) reference to the data at the first |
1219 | * element of the %vector. |
1220 | */ |
1221 | _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR |
1222 | const_reference |
1223 | front() const _GLIBCXX_NOEXCEPT |
1224 | { |
1225 | __glibcxx_requires_nonempty(); |
1226 | return *begin(); |
1227 | } |
1228 | |
1229 | /** |
1230 | * Returns a read/write reference to the data at the last |
1231 | * element of the %vector. |
1232 | */ |
1233 | _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR |
1234 | reference |
1235 | back() _GLIBCXX_NOEXCEPT |
1236 | { |
1237 | __glibcxx_requires_nonempty(); |
1238 | return *(end() - 1); |
1239 | } |
1240 | |
1241 | /** |
1242 | * Returns a read-only (constant) reference to the data at the |
1243 | * last element of the %vector. |
1244 | */ |
1245 | _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR |
1246 | const_reference |
1247 | back() const _GLIBCXX_NOEXCEPT |
1248 | { |
1249 | __glibcxx_requires_nonempty(); |
1250 | return *(end() - 1); |
1251 | } |
1252 | |
1253 | // _GLIBCXX_RESOLVE_LIB_DEFECTS |
1254 | // DR 464. Suggestion for new member functions in standard containers. |
1255 | // data access |
1256 | /** |
1257 | * Returns a pointer such that [data(), data() + size()) is a valid |
1258 | * range. For a non-empty %vector, data() == &front(). |
1259 | */ |
1260 | _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR |
1261 | _Tp* |
1262 | data() _GLIBCXX_NOEXCEPT |
1263 | { return _M_data_ptr(this->_M_impl._M_start); } |
1264 | |
1265 | _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR |
1266 | const _Tp* |
1267 | data() const _GLIBCXX_NOEXCEPT |
1268 | { return _M_data_ptr(this->_M_impl._M_start); } |
1269 | |
1270 | // [23.2.4.3] modifiers |
1271 | /** |
1272 | * @brief Add data to the end of the %vector. |
1273 | * @param __x Data to be added. |
1274 | * |
1275 | * This is a typical stack operation. The function creates an |
1276 | * element at the end of the %vector and assigns the given data |
1277 | * to it. Due to the nature of a %vector this operation can be |
1278 | * done in constant time if the %vector has preallocated space |
1279 | * available. |
1280 | */ |
1281 | _GLIBCXX20_CONSTEXPR |
1282 | void |
1283 | push_back(const value_type& __x) |
1284 | { |
1285 | if (this->_M_impl._M_finish != this->_M_impl._M_end_of_storage) |
1286 | { |
1287 | _GLIBCXX_ASAN_ANNOTATE_GROW(1); |
1288 | _Alloc_traits::construct(this->_M_impl, this->_M_impl._M_finish, |
1289 | __x); |
1290 | ++this->_M_impl._M_finish; |
1291 | _GLIBCXX_ASAN_ANNOTATE_GREW(1); |
1292 | } |
1293 | else |
1294 | _M_realloc_append(__x); |
1295 | } |
1296 | |
1297 | #if __cplusplus >= 201103L |
1298 | _GLIBCXX20_CONSTEXPR |
1299 | void |
1300 | push_back(value_type&& __x) |
1301 | { emplace_back(std::move(__x)); } |
1302 | |
1303 | template<typename... _Args> |
1304 | #if __cplusplus > 201402L |
1305 | _GLIBCXX20_CONSTEXPR |
1306 | reference |
1307 | #else |
1308 | void |
1309 | #endif |
1310 | emplace_back(_Args&&... __args); |
1311 | #endif |
1312 | |
1313 | /** |
1314 | * @brief Removes last element. |
1315 | * |
1316 | * This is a typical stack operation. It shrinks the %vector by one. |
1317 | * |
1318 | * Note that no data is returned, and if the last element's |
1319 | * data is needed, it should be retrieved before pop_back() is |
1320 | * called. |
1321 | */ |
1322 | _GLIBCXX20_CONSTEXPR |
1323 | void |
1324 | pop_back() _GLIBCXX_NOEXCEPT |
1325 | { |
1326 | __glibcxx_requires_nonempty(); |
1327 | --this->_M_impl._M_finish; |
1328 | _Alloc_traits::destroy(this->_M_impl, this->_M_impl._M_finish); |
1329 | _GLIBCXX_ASAN_ANNOTATE_SHRINK(1); |
1330 | } |
1331 | |
1332 | #if __cplusplus >= 201103L |
1333 | /** |
1334 | * @brief Inserts an object in %vector before specified iterator. |
1335 | * @param __position A const_iterator into the %vector. |
1336 | * @param __args Arguments. |
1337 | * @return An iterator that points to the inserted data. |
1338 | * |
1339 | * This function will insert an object of type T constructed |
1340 | * with T(std::forward<Args>(args)...) before the specified location. |
1341 | * Note that this kind of operation could be expensive for a %vector |
1342 | * and if it is frequently used the user should consider using |
1343 | * std::list. |
1344 | */ |
1345 | template<typename... _Args> |
1346 | _GLIBCXX20_CONSTEXPR |
1347 | iterator |
1348 | emplace(const_iterator __position, _Args&&... __args) |
1349 | { return _M_emplace_aux(__position, std::forward<_Args>(__args)...); } |
1350 | |
1351 | /** |
1352 | * @brief Inserts given value into %vector before specified iterator. |
1353 | * @param __position A const_iterator into the %vector. |
1354 | * @param __x Data to be inserted. |
1355 | * @return An iterator that points to the inserted data. |
1356 | * |
1357 | * This function will insert a copy of the given value before |
1358 | * the specified location. Note that this kind of operation |
1359 | * could be expensive for a %vector and if it is frequently |
1360 | * used the user should consider using std::list. |
1361 | */ |
1362 | _GLIBCXX20_CONSTEXPR |
1363 | iterator |
1364 | insert(const_iterator __position, const value_type& __x); |
1365 | #else |
1366 | /** |
1367 | * @brief Inserts given value into %vector before specified iterator. |
1368 | * @param __position An iterator into the %vector. |
1369 | * @param __x Data to be inserted. |
1370 | * @return An iterator that points to the inserted data. |
1371 | * |
1372 | * This function will insert a copy of the given value before |
1373 | * the specified location. Note that this kind of operation |
1374 | * could be expensive for a %vector and if it is frequently |
1375 | * used the user should consider using std::list. |
1376 | */ |
1377 | iterator |
1378 | insert(iterator __position, const value_type& __x); |
1379 | #endif |
1380 | |
1381 | #if __cplusplus >= 201103L |
1382 | /** |
1383 | * @brief Inserts given rvalue into %vector before specified iterator. |
1384 | * @param __position A const_iterator into the %vector. |
1385 | * @param __x Data to be inserted. |
1386 | * @return An iterator that points to the inserted data. |
1387 | * |
1388 | * This function will insert a copy of the given rvalue before |
1389 | * the specified location. Note that this kind of operation |
1390 | * could be expensive for a %vector and if it is frequently |
1391 | * used the user should consider using std::list. |
1392 | */ |
1393 | _GLIBCXX20_CONSTEXPR |
1394 | iterator |
1395 | insert(const_iterator __position, value_type&& __x) |
1396 | { return _M_insert_rval(__position, v: std::move(__x)); } |
1397 | |
1398 | /** |
1399 | * @brief Inserts an initializer_list into the %vector. |
1400 | * @param __position An iterator into the %vector. |
1401 | * @param __l An initializer_list. |
1402 | * |
1403 | * This function will insert copies of the data in the |
1404 | * initializer_list @a l into the %vector before the location |
1405 | * specified by @a position. |
1406 | * |
1407 | * Note that this kind of operation could be expensive for a |
1408 | * %vector and if it is frequently used the user should |
1409 | * consider using std::list. |
1410 | */ |
1411 | _GLIBCXX20_CONSTEXPR |
1412 | iterator |
1413 | insert(const_iterator __position, initializer_list<value_type> __l) |
1414 | { |
1415 | auto __offset = __position - cbegin(); |
1416 | _M_range_insert(begin() + __offset, __l.begin(), __l.end(), |
1417 | std::random_access_iterator_tag()); |
1418 | return begin() + __offset; |
1419 | } |
1420 | #endif |
1421 | |
1422 | #if __cplusplus >= 201103L |
1423 | /** |
1424 | * @brief Inserts a number of copies of given data into the %vector. |
1425 | * @param __position A const_iterator into the %vector. |
1426 | * @param __n Number of elements to be inserted. |
1427 | * @param __x Data to be inserted. |
1428 | * @return An iterator that points to the inserted data. |
1429 | * |
1430 | * This function will insert a specified number of copies of |
1431 | * the given data before the location specified by @a position. |
1432 | * |
1433 | * Note that this kind of operation could be expensive for a |
1434 | * %vector and if it is frequently used the user should |
1435 | * consider using std::list. |
1436 | */ |
1437 | _GLIBCXX20_CONSTEXPR |
1438 | iterator |
1439 | insert(const_iterator __position, size_type __n, const value_type& __x) |
1440 | { |
1441 | difference_type __offset = __position - cbegin(); |
1442 | _M_fill_insert(pos: begin() + __offset, __n, __x); |
1443 | return begin() + __offset; |
1444 | } |
1445 | #else |
1446 | /** |
1447 | * @brief Inserts a number of copies of given data into the %vector. |
1448 | * @param __position An iterator into the %vector. |
1449 | * @param __n Number of elements to be inserted. |
1450 | * @param __x Data to be inserted. |
1451 | * |
1452 | * This function will insert a specified number of copies of |
1453 | * the given data before the location specified by @a position. |
1454 | * |
1455 | * Note that this kind of operation could be expensive for a |
1456 | * %vector and if it is frequently used the user should |
1457 | * consider using std::list. |
1458 | */ |
1459 | void |
1460 | insert(iterator __position, size_type __n, const value_type& __x) |
1461 | { _M_fill_insert(__position, __n, __x); } |
1462 | #endif |
1463 | |
1464 | #if __cplusplus >= 201103L |
1465 | /** |
1466 | * @brief Inserts a range into the %vector. |
1467 | * @param __position A const_iterator into the %vector. |
1468 | * @param __first An input iterator. |
1469 | * @param __last An input iterator. |
1470 | * @return An iterator that points to the inserted data. |
1471 | * |
1472 | * This function will insert copies of the data in the range |
1473 | * [__first,__last) into the %vector before the location specified |
1474 | * by @a pos. |
1475 | * |
1476 | * Note that this kind of operation could be expensive for a |
1477 | * %vector and if it is frequently used the user should |
1478 | * consider using std::list. |
1479 | */ |
1480 | template<typename _InputIterator, |
1481 | typename = std::_RequireInputIter<_InputIterator>> |
1482 | _GLIBCXX20_CONSTEXPR |
1483 | iterator |
1484 | insert(const_iterator __position, _InputIterator __first, |
1485 | _InputIterator __last) |
1486 | { |
1487 | difference_type __offset = __position - cbegin(); |
1488 | _M_range_insert(begin() + __offset, __first, __last, |
1489 | std::__iterator_category(__first)); |
1490 | return begin() + __offset; |
1491 | } |
1492 | #else |
1493 | /** |
1494 | * @brief Inserts a range into the %vector. |
1495 | * @param __position An iterator into the %vector. |
1496 | * @param __first An input iterator. |
1497 | * @param __last An input iterator. |
1498 | * |
1499 | * This function will insert copies of the data in the range |
1500 | * [__first,__last) into the %vector before the location specified |
1501 | * by @a pos. |
1502 | * |
1503 | * Note that this kind of operation could be expensive for a |
1504 | * %vector and if it is frequently used the user should |
1505 | * consider using std::list. |
1506 | */ |
1507 | template<typename _InputIterator> |
1508 | void |
1509 | insert(iterator __position, _InputIterator __first, |
1510 | _InputIterator __last) |
1511 | { |
1512 | // Check whether it's an integral type. If so, it's not an iterator. |
1513 | typedef typename std::__is_integer<_InputIterator>::__type _Integral; |
1514 | _M_insert_dispatch(__position, __first, __last, _Integral()); |
1515 | } |
1516 | #endif |
1517 | |
1518 | /** |
1519 | * @brief Remove element at given position. |
1520 | * @param __position Iterator pointing to element to be erased. |
1521 | * @return An iterator pointing to the next element (or end()). |
1522 | * |
1523 | * This function will erase the element at the given position and thus |
1524 | * shorten the %vector by one. |
1525 | * |
1526 | * Note This operation could be expensive and if it is |
1527 | * frequently used the user should consider using std::list. |
1528 | * The user is also cautioned that this function only erases |
1529 | * the element, and that if the element is itself a pointer, |
1530 | * the pointed-to memory is not touched in any way. Managing |
1531 | * the pointer is the user's responsibility. |
1532 | */ |
1533 | _GLIBCXX20_CONSTEXPR |
1534 | iterator |
1535 | #if __cplusplus >= 201103L |
1536 | erase(const_iterator __position) |
1537 | { return _M_erase(begin() + (__position - cbegin())); } |
1538 | #else |
1539 | erase(iterator __position) |
1540 | { return _M_erase(__position); } |
1541 | #endif |
1542 | |
1543 | /** |
1544 | * @brief Remove a range of elements. |
1545 | * @param __first Iterator pointing to the first element to be erased. |
1546 | * @param __last Iterator pointing to one past the last element to be |
1547 | * erased. |
1548 | * @return An iterator pointing to the element pointed to by @a __last |
1549 | * prior to erasing (or end()). |
1550 | * |
1551 | * This function will erase the elements in the range |
1552 | * [__first,__last) and shorten the %vector accordingly. |
1553 | * |
1554 | * Note This operation could be expensive and if it is |
1555 | * frequently used the user should consider using std::list. |
1556 | * The user is also cautioned that this function only erases |
1557 | * the elements, and that if the elements themselves are |
1558 | * pointers, the pointed-to memory is not touched in any way. |
1559 | * Managing the pointer is the user's responsibility. |
1560 | */ |
1561 | _GLIBCXX20_CONSTEXPR |
1562 | iterator |
1563 | #if __cplusplus >= 201103L |
1564 | erase(const_iterator __first, const_iterator __last) |
1565 | { |
1566 | const auto __beg = begin(); |
1567 | const auto __cbeg = cbegin(); |
1568 | return _M_erase(__beg + (__first - __cbeg), __beg + (__last - __cbeg)); |
1569 | } |
1570 | #else |
1571 | erase(iterator __first, iterator __last) |
1572 | { return _M_erase(__first, __last); } |
1573 | #endif |
1574 | |
1575 | /** |
1576 | * @brief Swaps data with another %vector. |
1577 | * @param __x A %vector of the same element and allocator types. |
1578 | * |
1579 | * This exchanges the elements between two vectors in constant time. |
1580 | * (Three pointers, so it should be quite fast.) |
1581 | * Note that the global std::swap() function is specialized such that |
1582 | * std::swap(v1,v2) will feed to this function. |
1583 | * |
1584 | * Whether the allocators are swapped depends on the allocator traits. |
1585 | */ |
1586 | _GLIBCXX20_CONSTEXPR |
1587 | void |
1588 | swap(vector& __x) _GLIBCXX_NOEXCEPT |
1589 | { |
1590 | #if __cplusplus >= 201103L |
1591 | __glibcxx_assert(_Alloc_traits::propagate_on_container_swap::value |
1592 | || _M_get_Tp_allocator() == __x._M_get_Tp_allocator()); |
1593 | #endif |
1594 | this->_M_impl._M_swap_data(__x._M_impl); |
1595 | _Alloc_traits::_S_on_swap(_M_get_Tp_allocator(), |
1596 | __x._M_get_Tp_allocator()); |
1597 | } |
1598 | |
1599 | /** |
1600 | * Erases all the elements. Note that this function only erases the |
1601 | * elements, and that if the elements themselves are pointers, the |
1602 | * pointed-to memory is not touched in any way. Managing the pointer is |
1603 | * the user's responsibility. |
1604 | */ |
1605 | _GLIBCXX20_CONSTEXPR |
1606 | void |
1607 | clear() _GLIBCXX_NOEXCEPT |
1608 | { _M_erase_at_end(pos: this->_M_impl._M_start); } |
1609 | |
1610 | protected: |
1611 | /** |
1612 | * Memory expansion handler. Uses the member allocation function to |
1613 | * obtain @a n bytes of memory, and then copies [first,last) into it. |
1614 | */ |
1615 | template<typename _ForwardIterator> |
1616 | _GLIBCXX20_CONSTEXPR |
1617 | pointer |
1618 | _M_allocate_and_copy(size_type __n, |
1619 | _ForwardIterator __first, _ForwardIterator __last) |
1620 | { |
1621 | pointer __result = this->_M_allocate(__n); |
1622 | __try |
1623 | { |
1624 | std::__uninitialized_copy_a(__first, __last, __result, |
1625 | _M_get_Tp_allocator()); |
1626 | return __result; |
1627 | } |
1628 | __catch(...) |
1629 | { |
1630 | _M_deallocate(__result, __n); |
1631 | __throw_exception_again; |
1632 | } |
1633 | } |
1634 | |
1635 | |
1636 | // Internal constructor functions follow. |
1637 | |
1638 | // Called by the range constructor to implement [23.1.1]/9 |
1639 | |
1640 | #if __cplusplus < 201103L |
1641 | // _GLIBCXX_RESOLVE_LIB_DEFECTS |
1642 | // 438. Ambiguity in the "do the right thing" clause |
1643 | template<typename _Integer> |
1644 | void |
1645 | _M_initialize_dispatch(_Integer __n, _Integer __value, __true_type) |
1646 | { |
1647 | this->_M_impl._M_start = _M_allocate(_S_check_init_len( |
1648 | static_cast<size_type>(__n), _M_get_Tp_allocator())); |
1649 | this->_M_impl._M_end_of_storage = |
1650 | this->_M_impl._M_start + static_cast<size_type>(__n); |
1651 | _M_fill_initialize(static_cast<size_type>(__n), __value); |
1652 | } |
1653 | |
1654 | // Called by the range constructor to implement [23.1.1]/9 |
1655 | template<typename _InputIterator> |
1656 | void |
1657 | _M_initialize_dispatch(_InputIterator __first, _InputIterator __last, |
1658 | __false_type) |
1659 | { |
1660 | _M_range_initialize(__first, __last, |
1661 | std::__iterator_category(__first)); |
1662 | } |
1663 | #endif |
1664 | |
1665 | // Called by the second initialize_dispatch above |
1666 | template<typename _InputIterator> |
1667 | _GLIBCXX20_CONSTEXPR |
1668 | void |
1669 | _M_range_initialize(_InputIterator __first, _InputIterator __last, |
1670 | std::input_iterator_tag) |
1671 | { |
1672 | __try { |
1673 | for (; __first != __last; ++__first) |
1674 | #if __cplusplus >= 201103L |
1675 | emplace_back(*__first); |
1676 | #else |
1677 | push_back(*__first); |
1678 | #endif |
1679 | } __catch(...) { |
1680 | clear(); |
1681 | __throw_exception_again; |
1682 | } |
1683 | } |
1684 | |
1685 | // Called by the second initialize_dispatch above |
1686 | template<typename _ForwardIterator> |
1687 | _GLIBCXX20_CONSTEXPR |
1688 | void |
1689 | _M_range_initialize(_ForwardIterator __first, _ForwardIterator __last, |
1690 | std::forward_iterator_tag) |
1691 | { |
1692 | const size_type __n = std::distance(__first, __last); |
1693 | this->_M_impl._M_start |
1694 | = this->_M_allocate(_S_check_init_len(__n, a: _M_get_Tp_allocator())); |
1695 | this->_M_impl._M_end_of_storage = this->_M_impl._M_start + __n; |
1696 | this->_M_impl._M_finish = |
1697 | std::__uninitialized_copy_a(__first, __last, |
1698 | this->_M_impl._M_start, |
1699 | _M_get_Tp_allocator()); |
1700 | } |
1701 | |
1702 | // Called by the first initialize_dispatch above and by the |
1703 | // vector(n,value,a) constructor. |
1704 | _GLIBCXX20_CONSTEXPR |
1705 | void |
1706 | _M_fill_initialize(size_type __n, const value_type& __value) |
1707 | { |
1708 | this->_M_impl._M_finish = |
1709 | std::__uninitialized_fill_n_a(this->_M_impl._M_start, __n, __value, |
1710 | _M_get_Tp_allocator()); |
1711 | } |
1712 | |
1713 | #if __cplusplus >= 201103L |
1714 | // Called by the vector(n) constructor. |
1715 | _GLIBCXX20_CONSTEXPR |
1716 | void |
1717 | _M_default_initialize(size_type __n) |
1718 | { |
1719 | this->_M_impl._M_finish = |
1720 | std::__uninitialized_default_n_a(this->_M_impl._M_start, __n, |
1721 | _M_get_Tp_allocator()); |
1722 | } |
1723 | #endif |
1724 | |
1725 | // Internal assign functions follow. The *_aux functions do the actual |
1726 | // assignment work for the range versions. |
1727 | |
1728 | // Called by the range assign to implement [23.1.1]/9 |
1729 | |
1730 | // _GLIBCXX_RESOLVE_LIB_DEFECTS |
1731 | // 438. Ambiguity in the "do the right thing" clause |
1732 | template<typename _Integer> |
1733 | _GLIBCXX20_CONSTEXPR |
1734 | void |
1735 | _M_assign_dispatch(_Integer __n, _Integer __val, __true_type) |
1736 | { _M_fill_assign(__n, __val); } |
1737 | |
1738 | // Called by the range assign to implement [23.1.1]/9 |
1739 | template<typename _InputIterator> |
1740 | _GLIBCXX20_CONSTEXPR |
1741 | void |
1742 | _M_assign_dispatch(_InputIterator __first, _InputIterator __last, |
1743 | __false_type) |
1744 | { _M_assign_aux(__first, __last, std::__iterator_category(__first)); } |
1745 | |
1746 | // Called by the second assign_dispatch above |
1747 | template<typename _InputIterator> |
1748 | _GLIBCXX20_CONSTEXPR |
1749 | void |
1750 | _M_assign_aux(_InputIterator __first, _InputIterator __last, |
1751 | std::input_iterator_tag); |
1752 | |
1753 | // Called by the second assign_dispatch above |
1754 | template<typename _ForwardIterator> |
1755 | _GLIBCXX20_CONSTEXPR |
1756 | void |
1757 | _M_assign_aux(_ForwardIterator __first, _ForwardIterator __last, |
1758 | std::forward_iterator_tag); |
1759 | |
1760 | // Called by assign(n,t), and the range assign when it turns out |
1761 | // to be the same thing. |
1762 | _GLIBCXX20_CONSTEXPR |
1763 | void |
1764 | _M_fill_assign(size_type __n, const value_type& __val); |
1765 | |
1766 | // Internal insert functions follow. |
1767 | |
1768 | // Called by the range insert to implement [23.1.1]/9 |
1769 | |
1770 | // _GLIBCXX_RESOLVE_LIB_DEFECTS |
1771 | // 438. Ambiguity in the "do the right thing" clause |
1772 | template<typename _Integer> |
1773 | _GLIBCXX20_CONSTEXPR |
1774 | void |
1775 | _M_insert_dispatch(iterator __pos, _Integer __n, _Integer __val, |
1776 | __true_type) |
1777 | { _M_fill_insert(__pos, __n, x: __val); } |
1778 | |
1779 | // Called by the range insert to implement [23.1.1]/9 |
1780 | template<typename _InputIterator> |
1781 | _GLIBCXX20_CONSTEXPR |
1782 | void |
1783 | _M_insert_dispatch(iterator __pos, _InputIterator __first, |
1784 | _InputIterator __last, __false_type) |
1785 | { |
1786 | _M_range_insert(__pos, __first, __last, |
1787 | std::__iterator_category(__first)); |
1788 | } |
1789 | |
1790 | // Called by the second insert_dispatch above |
1791 | template<typename _InputIterator> |
1792 | _GLIBCXX20_CONSTEXPR |
1793 | void |
1794 | _M_range_insert(iterator __pos, _InputIterator __first, |
1795 | _InputIterator __last, std::input_iterator_tag); |
1796 | |
1797 | // Called by the second insert_dispatch above |
1798 | template<typename _ForwardIterator> |
1799 | _GLIBCXX20_CONSTEXPR |
1800 | void |
1801 | _M_range_insert(iterator __pos, _ForwardIterator __first, |
1802 | _ForwardIterator __last, std::forward_iterator_tag); |
1803 | |
1804 | // Called by insert(p,n,x), and the range insert when it turns out to be |
1805 | // the same thing. |
1806 | _GLIBCXX20_CONSTEXPR |
1807 | void |
1808 | _M_fill_insert(iterator __pos, size_type __n, const value_type& __x); |
1809 | |
1810 | #if __cplusplus >= 201103L |
1811 | // Called by resize(n). |
1812 | _GLIBCXX20_CONSTEXPR |
1813 | void |
1814 | _M_default_append(size_type __n); |
1815 | |
1816 | _GLIBCXX20_CONSTEXPR |
1817 | bool |
1818 | _M_shrink_to_fit(); |
1819 | #endif |
1820 | |
1821 | #if __cplusplus < 201103L |
1822 | // Called by insert(p,x) |
1823 | void |
1824 | _M_insert_aux(iterator __position, const value_type& __x); |
1825 | |
1826 | void |
1827 | _M_realloc_insert(iterator __position, const value_type& __x); |
1828 | |
1829 | void |
1830 | _M_realloc_append(const value_type& __x); |
1831 | #else |
1832 | // A value_type object constructed with _Alloc_traits::construct() |
1833 | // and destroyed with _Alloc_traits::destroy(). |
1834 | struct _Temporary_value |
1835 | { |
1836 | template<typename... _Args> |
1837 | _GLIBCXX20_CONSTEXPR explicit |
1838 | _Temporary_value(vector* __vec, _Args&&... __args) : _M_this(__vec) |
1839 | { |
1840 | _Alloc_traits::construct(_M_this->_M_impl, _M_ptr(), |
1841 | std::forward<_Args>(__args)...); |
1842 | } |
1843 | |
1844 | _GLIBCXX20_CONSTEXPR |
1845 | ~_Temporary_value() |
1846 | { _Alloc_traits::destroy(_M_this->_M_impl, _M_ptr()); } |
1847 | |
1848 | _GLIBCXX20_CONSTEXPR value_type& |
1849 | _M_val() noexcept { return _M_storage._M_val; } |
1850 | |
1851 | private: |
1852 | _GLIBCXX20_CONSTEXPR _Tp* |
1853 | _M_ptr() noexcept { return std::__addressof(_M_storage._M_val); } |
1854 | |
1855 | union _Storage |
1856 | { |
1857 | constexpr _Storage() : _M_byte() { } |
1858 | _GLIBCXX20_CONSTEXPR ~_Storage() { } |
1859 | _Storage& operator=(const _Storage&) = delete; |
1860 | unsigned char _M_byte; |
1861 | _Tp _M_val; |
1862 | }; |
1863 | |
1864 | vector* _M_this; |
1865 | _Storage _M_storage; |
1866 | }; |
1867 | |
1868 | // Called by insert(p,x) and other functions when insertion needs to |
1869 | // reallocate or move existing elements. _Arg is either _Tp& or _Tp. |
1870 | template<typename _Arg> |
1871 | _GLIBCXX20_CONSTEXPR |
1872 | void |
1873 | _M_insert_aux(iterator __position, _Arg&& __arg); |
1874 | |
1875 | template<typename... _Args> |
1876 | _GLIBCXX20_CONSTEXPR |
1877 | void |
1878 | _M_realloc_insert(iterator __position, _Args&&... __args); |
1879 | |
1880 | template<typename... _Args> |
1881 | _GLIBCXX20_CONSTEXPR |
1882 | void |
1883 | _M_realloc_append(_Args&&... __args); |
1884 | |
1885 | // Either move-construct at the end, or forward to _M_insert_aux. |
1886 | _GLIBCXX20_CONSTEXPR |
1887 | iterator |
1888 | _M_insert_rval(const_iterator __position, value_type&& __v); |
1889 | |
1890 | // Try to emplace at the end, otherwise forward to _M_insert_aux. |
1891 | template<typename... _Args> |
1892 | _GLIBCXX20_CONSTEXPR |
1893 | iterator |
1894 | _M_emplace_aux(const_iterator __position, _Args&&... __args); |
1895 | |
1896 | // Emplacing an rvalue of the correct type can use _M_insert_rval. |
1897 | _GLIBCXX20_CONSTEXPR |
1898 | iterator |
1899 | _M_emplace_aux(const_iterator __position, value_type&& __v) |
1900 | { return _M_insert_rval(__position, v: std::move(__v)); } |
1901 | #endif |
1902 | |
1903 | // Called by _M_fill_insert, _M_insert_aux etc. |
1904 | _GLIBCXX20_CONSTEXPR |
1905 | size_type |
1906 | _M_check_len(size_type __n, const char* __s) const |
1907 | { |
1908 | if (max_size() - size() < __n) |
1909 | __throw_length_error(__N(__s)); |
1910 | |
1911 | const size_type __len = size() + (std::max)(size(), __n); |
1912 | return (__len < size() || __len > max_size()) ? max_size() : __len; |
1913 | } |
1914 | |
1915 | // Called by constructors to check initial size. |
1916 | static _GLIBCXX20_CONSTEXPR size_type |
1917 | _S_check_init_len(size_type __n, const allocator_type& __a) |
1918 | { |
1919 | if (__n > _S_max_size(a: _Tp_alloc_type(__a))) |
1920 | __throw_length_error( |
1921 | __N("cannot create std::vector larger than max_size()" )); |
1922 | return __n; |
1923 | } |
1924 | |
1925 | static _GLIBCXX20_CONSTEXPR size_type |
1926 | _S_max_size(const _Tp_alloc_type& __a) _GLIBCXX_NOEXCEPT |
1927 | { |
1928 | // std::distance(begin(), end()) cannot be greater than PTRDIFF_MAX, |
1929 | // and realistically we can't store more than PTRDIFF_MAX/sizeof(T) |
1930 | // (even if std::allocator_traits::max_size says we can). |
1931 | const size_t __diffmax |
1932 | = __gnu_cxx::__numeric_traits<ptrdiff_t>::__max / sizeof(_Tp); |
1933 | const size_t __allocmax = _Alloc_traits::max_size(__a); |
1934 | return (std::min)(a: __diffmax, b: __allocmax); |
1935 | } |
1936 | |
1937 | // Internal erase functions follow. |
1938 | |
1939 | // Called by erase(q1,q2), clear(), resize(), _M_fill_assign, |
1940 | // _M_assign_aux. |
1941 | _GLIBCXX20_CONSTEXPR |
1942 | void |
1943 | _M_erase_at_end(pointer __pos) _GLIBCXX_NOEXCEPT |
1944 | { |
1945 | if (size_type __n = this->_M_impl._M_finish - __pos) |
1946 | { |
1947 | std::_Destroy(__pos, this->_M_impl._M_finish, |
1948 | _M_get_Tp_allocator()); |
1949 | this->_M_impl._M_finish = __pos; |
1950 | _GLIBCXX_ASAN_ANNOTATE_SHRINK(__n); |
1951 | } |
1952 | } |
1953 | |
1954 | _GLIBCXX20_CONSTEXPR |
1955 | iterator |
1956 | _M_erase(iterator __position); |
1957 | |
1958 | _GLIBCXX20_CONSTEXPR |
1959 | iterator |
1960 | _M_erase(iterator __first, iterator __last); |
1961 | |
1962 | #if __cplusplus >= 201103L |
1963 | private: |
1964 | // Constant-time move assignment when source object's memory can be |
1965 | // moved, either because the source's allocator will move too |
1966 | // or because the allocators are equal. |
1967 | _GLIBCXX20_CONSTEXPR |
1968 | void |
1969 | _M_move_assign(vector&& __x, true_type) noexcept |
1970 | { |
1971 | vector __tmp(get_allocator()); |
1972 | this->_M_impl._M_swap_data(__x._M_impl); |
1973 | __tmp._M_impl._M_swap_data(__x._M_impl); |
1974 | std::__alloc_on_move(_M_get_Tp_allocator(), __x._M_get_Tp_allocator()); |
1975 | } |
1976 | |
1977 | // Do move assignment when it might not be possible to move source |
1978 | // object's memory, resulting in a linear-time operation. |
1979 | _GLIBCXX20_CONSTEXPR |
1980 | void |
1981 | _M_move_assign(vector&& __x, false_type) |
1982 | { |
1983 | if (__x._M_get_Tp_allocator() == this->_M_get_Tp_allocator()) |
1984 | _M_move_assign(std::move(__x), true_type()); |
1985 | else |
1986 | { |
1987 | // The rvalue's allocator cannot be moved and is not equal, |
1988 | // so we need to individually move each element. |
1989 | this->_M_assign_aux(std::make_move_iterator(__x.begin()), |
1990 | std::make_move_iterator(__x.end()), |
1991 | std::random_access_iterator_tag()); |
1992 | __x.clear(); |
1993 | } |
1994 | } |
1995 | #endif |
1996 | |
1997 | template<typename _Up> |
1998 | _GLIBCXX20_CONSTEXPR |
1999 | _Up* |
2000 | _M_data_ptr(_Up* __ptr) const _GLIBCXX_NOEXCEPT |
2001 | { return __ptr; } |
2002 | |
2003 | #if __cplusplus >= 201103L |
2004 | template<typename _Ptr> |
2005 | _GLIBCXX20_CONSTEXPR |
2006 | typename std::pointer_traits<_Ptr>::element_type* |
2007 | _M_data_ptr(_Ptr __ptr) const |
2008 | { return empty() ? nullptr : std::__to_address(__ptr); } |
2009 | #else |
2010 | template<typename _Up> |
2011 | _Up* |
2012 | _M_data_ptr(_Up* __ptr) _GLIBCXX_NOEXCEPT |
2013 | { return __ptr; } |
2014 | |
2015 | template<typename _Ptr> |
2016 | value_type* |
2017 | _M_data_ptr(_Ptr __ptr) |
2018 | { return empty() ? (value_type*)0 : __ptr.operator->(); } |
2019 | |
2020 | template<typename _Ptr> |
2021 | const value_type* |
2022 | _M_data_ptr(_Ptr __ptr) const |
2023 | { return empty() ? (const value_type*)0 : __ptr.operator->(); } |
2024 | #endif |
2025 | }; |
2026 | |
2027 | #if __cpp_deduction_guides >= 201606 |
2028 | template<typename _InputIterator, typename _ValT |
2029 | = typename iterator_traits<_InputIterator>::value_type, |
2030 | typename _Allocator = allocator<_ValT>, |
2031 | typename = _RequireInputIter<_InputIterator>, |
2032 | typename = _RequireAllocator<_Allocator>> |
2033 | vector(_InputIterator, _InputIterator, _Allocator = _Allocator()) |
2034 | -> vector<_ValT, _Allocator>; |
2035 | #endif |
2036 | |
2037 | /** |
2038 | * @brief Vector equality comparison. |
2039 | * @param __x A %vector. |
2040 | * @param __y A %vector of the same type as @a __x. |
2041 | * @return True iff the size and elements of the vectors are equal. |
2042 | * |
2043 | * This is an equivalence relation. It is linear in the size of the |
2044 | * vectors. Vectors are considered equivalent if their sizes are equal, |
2045 | * and if corresponding elements compare equal. |
2046 | */ |
2047 | template<typename _Tp, typename _Alloc> |
2048 | _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR |
2049 | inline bool |
2050 | operator==(const vector<_Tp, _Alloc>& __x, const vector<_Tp, _Alloc>& __y) |
2051 | { return (__x.size() == __y.size() |
2052 | && std::equal(__x.begin(), __x.end(), __y.begin())); } |
2053 | |
2054 | #if __cpp_lib_three_way_comparison |
2055 | /** |
2056 | * @brief Vector ordering relation. |
2057 | * @param __x A `vector`. |
2058 | * @param __y A `vector` of the same type as `__x`. |
2059 | * @return A value indicating whether `__x` is less than, equal to, |
2060 | * greater than, or incomparable with `__y`. |
2061 | * |
2062 | * See `std::lexicographical_compare_three_way()` for how the determination |
2063 | * is made. This operator is used to synthesize relational operators like |
2064 | * `<` and `>=` etc. |
2065 | */ |
2066 | template<typename _Tp, typename _Alloc> |
2067 | [[nodiscard]] _GLIBCXX20_CONSTEXPR |
2068 | inline __detail::__synth3way_t<_Tp> |
2069 | operator<=>(const vector<_Tp, _Alloc>& __x, const vector<_Tp, _Alloc>& __y) |
2070 | { |
2071 | return std::lexicographical_compare_three_way(__x.begin(), __x.end(), |
2072 | __y.begin(), __y.end(), |
2073 | __detail::__synth3way); |
2074 | } |
2075 | #else |
2076 | /** |
2077 | * @brief Vector ordering relation. |
2078 | * @param __x A %vector. |
2079 | * @param __y A %vector of the same type as @a __x. |
2080 | * @return True iff @a __x is lexicographically less than @a __y. |
2081 | * |
2082 | * This is a total ordering relation. It is linear in the size of the |
2083 | * vectors. The elements must be comparable with @c <. |
2084 | * |
2085 | * See std::lexicographical_compare() for how the determination is made. |
2086 | */ |
2087 | template<typename _Tp, typename _Alloc> |
2088 | _GLIBCXX_NODISCARD inline bool |
2089 | operator<(const vector<_Tp, _Alloc>& __x, const vector<_Tp, _Alloc>& __y) |
2090 | { return std::lexicographical_compare(__x.begin(), __x.end(), |
2091 | __y.begin(), __y.end()); } |
2092 | |
2093 | /// Based on operator== |
2094 | template<typename _Tp, typename _Alloc> |
2095 | _GLIBCXX_NODISCARD inline bool |
2096 | operator!=(const vector<_Tp, _Alloc>& __x, const vector<_Tp, _Alloc>& __y) |
2097 | { return !(__x == __y); } |
2098 | |
2099 | /// Based on operator< |
2100 | template<typename _Tp, typename _Alloc> |
2101 | _GLIBCXX_NODISCARD inline bool |
2102 | operator>(const vector<_Tp, _Alloc>& __x, const vector<_Tp, _Alloc>& __y) |
2103 | { return __y < __x; } |
2104 | |
2105 | /// Based on operator< |
2106 | template<typename _Tp, typename _Alloc> |
2107 | _GLIBCXX_NODISCARD inline bool |
2108 | operator<=(const vector<_Tp, _Alloc>& __x, const vector<_Tp, _Alloc>& __y) |
2109 | { return !(__y < __x); } |
2110 | |
2111 | /// Based on operator< |
2112 | template<typename _Tp, typename _Alloc> |
2113 | _GLIBCXX_NODISCARD inline bool |
2114 | operator>=(const vector<_Tp, _Alloc>& __x, const vector<_Tp, _Alloc>& __y) |
2115 | { return !(__x < __y); } |
2116 | #endif // three-way comparison |
2117 | |
2118 | /// See std::vector::swap(). |
2119 | template<typename _Tp, typename _Alloc> |
2120 | _GLIBCXX20_CONSTEXPR |
2121 | inline void |
2122 | swap(vector<_Tp, _Alloc>& __x, vector<_Tp, _Alloc>& __y) |
2123 | _GLIBCXX_NOEXCEPT_IF(noexcept(__x.swap(__y))) |
2124 | { __x.swap(__y); } |
2125 | |
2126 | _GLIBCXX_END_NAMESPACE_CONTAINER |
2127 | |
2128 | #if __cplusplus >= 201703L |
2129 | namespace __detail::__variant |
2130 | { |
2131 | template<typename> struct _Never_valueless_alt; // see <variant> |
2132 | |
2133 | // Provide the strong exception-safety guarantee when emplacing a |
2134 | // vector into a variant, but only if move assignment cannot throw. |
2135 | template<typename _Tp, typename _Alloc> |
2136 | struct _Never_valueless_alt<_GLIBCXX_STD_C::vector<_Tp, _Alloc>> |
2137 | : std::is_nothrow_move_assignable<_GLIBCXX_STD_C::vector<_Tp, _Alloc>> |
2138 | { }; |
2139 | } // namespace __detail::__variant |
2140 | #endif // C++17 |
2141 | |
2142 | _GLIBCXX_END_NAMESPACE_VERSION |
2143 | } // namespace std |
2144 | |
2145 | #endif /* _STL_VECTOR_H */ |
2146 | |