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/usr/include/c++/13/debug/set.h
$ cat -n /usr/include/c++/13/debug/set.h 1 // Debugging set implementation -*- C++ -*- 2 3 // Copyright (C) 2003-2023 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 /** @file debug/set.h 26 * This file is a GNU debug extension to the Standard C++ Library. 27 */ 28 29 #ifndef _GLIBCXX_DEBUG_SET_H 30 #define _GLIBCXX_DEBUG_SET_H 1 31 32 #include <debug/safe_sequence.h> 33 #include <debug/safe_container.h> 34 #include <debug/safe_iterator.h> 35 #include <bits/stl_pair.h> 36 37 namespace std _GLIBCXX_VISIBILITY(default) 38 { 39 namespace __debug 40 { 41 /// Class std::set with safety/checking/debug instrumentation. 42 template<typename _Key, typename _Compare = std::less<_Key>, 43 typename _Allocator = std::allocator<_Key> > 44 class set 45 : public __gnu_debug::_Safe_container< 46 set<_Key, _Compare, _Allocator>, _Allocator, 47 __gnu_debug::_Safe_node_sequence>, 48 public _GLIBCXX_STD_C::set<_Key,_Compare,_Allocator> 49 { 50 typedef _GLIBCXX_STD_C::set<_Key, _Compare, _Allocator> _Base; 51 typedef __gnu_debug::_Safe_container< 52 set, _Allocator, __gnu_debug::_Safe_node_sequence> _Safe; 53 54 typedef typename _Base::const_iterator _Base_const_iterator; 55 typedef typename _Base::iterator _Base_iterator; 56 typedef __gnu_debug::_Equal_to<_Base_const_iterator> _Equal; 57 58 template<typename _ItT, typename _SeqT, typename _CatT> 59 friend class ::__gnu_debug::_Safe_iterator; 60 61 // Reference wrapper for base class. Disambiguates set(const _Base&) 62 // from copy constructor by requiring a user-defined conversion. 63 // See PR libstdc++/90102. 64 struct _Base_ref 65 { 66 _Base_ref(const _Base& __r) : _M_ref(__r) { } 67 68 const _Base& _M_ref; 69 }; 70 71 public: 72 // types: 73 typedef _Key key_type; 74 typedef _Key value_type; 75 typedef _Compare key_compare; 76 typedef _Compare value_compare; 77 typedef _Allocator allocator_type; 78 typedef typename _Base::reference reference; 79 typedef typename _Base::const_reference const_reference; 80 81 typedef __gnu_debug::_Safe_iterator<_Base_iterator, set> 82 iterator; 83 typedef __gnu_debug::_Safe_iterator<_Base_const_iterator, set> 84 const_iterator; 85 86 typedef typename _Base::size_type size_type; 87 typedef typename _Base::difference_type difference_type; 88 typedef typename _Base::pointer pointer; 89 typedef typename _Base::const_pointer const_pointer; 90 typedef std::reverse_iterator<iterator> reverse_iterator; 91 typedef std::reverse_iterator<const_iterator> const_reverse_iterator; 92 93 // 23.3.3.1 construct/copy/destroy: 94 95 #if __cplusplus < 201103L 96 set() : _Base() { } 97 98 set(const set& __x) 99 : _Base(__x) { } 100 101 ~set() { } 102 #else 103 set() = default; 104 set(const set&) = default; 105 set(set&&) = default; 106 107 set(initializer_list<value_type> __l, 108 const _Compare& __comp = _Compare(), 109 const allocator_type& __a = allocator_type()) 110 : _Base(__l, __comp, __a) { } 111 112 explicit 113 set(const allocator_type& __a) 114 : _Base(__a) { } 115 116 set(const set& __x, const __type_identity_t<allocator_type>& __a) 117 : _Base(__x, __a) { } 118 119 set(set&& __x, const __type_identity_t<allocator_type>& __a) 120 noexcept( noexcept(_Base(std::move(__x), __a)) ) 121 : _Safe(std::move(__x), __a), 122 _Base(std::move(__x), __a) { } 123 124 set(initializer_list<value_type> __l, const allocator_type& __a) 125 : _Base(__l, __a) { } 126 127 template<typename _InputIterator> 128 set(_InputIterator __first, _InputIterator __last, 129 const allocator_type& __a) 130 : _Base(__gnu_debug::__base( 131 __glibcxx_check_valid_constructor_range(__first, __last)), 132 __gnu_debug::__base(__last), __a) { } 133 134 ~set() = default; 135 #endif 136 137 explicit set(const _Compare& __comp, 138 const _Allocator& __a = _Allocator()) 139 : _Base(__comp, __a) { } 140 141 template<typename _InputIterator> 142 set(_InputIterator __first, _InputIterator __last, 143 const _Compare& __comp = _Compare(), 144 const _Allocator& __a = _Allocator()) 145 : _Base(__gnu_debug::__base( 146 __glibcxx_check_valid_constructor_range(__first, __last)), 147 __gnu_debug::__base(__last), 148 __comp, __a) { } 149 150 set(_Base_ref __x) 151 : _Base(__x._M_ref) { } 152 153 #if __cplusplus >= 201103L 154 set& 155 operator=(const set&) = default; 156 157 set& 158 operator=(set&&) = default; 159 160 set& 161 operator=(initializer_list<value_type> __l) 162 { 163 _Base::operator=(__l); 164 this->_M_invalidate_all(); 165 return *this; 166 } 167 #endif 168 169 using _Base::get_allocator; 170 171 // iterators: 172 iterator 173 begin() _GLIBCXX_NOEXCEPT 174 { return iterator(_Base::begin(), this); } 175 176 const_iterator 177 begin() const _GLIBCXX_NOEXCEPT 178 { return const_iterator(_Base::begin(), this); } 179 180 iterator 181 end() _GLIBCXX_NOEXCEPT 182 { return iterator(_Base::end(), this); } 183 184 const_iterator 185 end() const _GLIBCXX_NOEXCEPT 186 { return const_iterator(_Base::end(), this); } 187 188 reverse_iterator 189 rbegin() _GLIBCXX_NOEXCEPT 190 { return reverse_iterator(end()); } 191 192 const_reverse_iterator 193 rbegin() const _GLIBCXX_NOEXCEPT 194 { return const_reverse_iterator(end()); } 195 196 reverse_iterator 197 rend() _GLIBCXX_NOEXCEPT 198 { return reverse_iterator(begin()); } 199 200 const_reverse_iterator 201 rend() const _GLIBCXX_NOEXCEPT 202 { return const_reverse_iterator(begin()); } 203 204 #if __cplusplus >= 201103L 205 const_iterator 206 cbegin() const noexcept 207 { return const_iterator(_Base::begin(), this); } 208 209 const_iterator 210 cend() const noexcept 211 { return const_iterator(_Base::end(), this); } 212 213 const_reverse_iterator 214 crbegin() const noexcept 215 { return const_reverse_iterator(end()); } 216 217 const_reverse_iterator 218 crend() const noexcept 219 { return const_reverse_iterator(begin()); } 220 #endif 221 222 // capacity: 223 using _Base::empty; 224 using _Base::size; 225 using _Base::max_size; 226 227 // modifiers: 228 #if __cplusplus >= 201103L 229 template<typename... _Args> 230 std::pair<iterator, bool> 231 emplace(_Args&&... __args) 232 { 233 auto __res = _Base::emplace(std::forward<_Args>(__args)...); 234 return { { __res.first, this }, __res.second }; 235 } 236 237 template<typename... _Args> 238 iterator 239 emplace_hint(const_iterator __pos, _Args&&... __args) 240 { 241 __glibcxx_check_insert(__pos); 242 return 243 { 244 _Base::emplace_hint(__pos.base(), std::forward<_Args>(__args)...), 245 this 246 }; 247 } 248 #endif 249 250 std::pair<iterator, bool> 251 insert(const value_type& __x) 252 { 253 std::pair<_Base_iterator, bool> __res = _Base::insert(__x); 254 return std::pair<iterator, bool>(iterator(__res.first, this), 255 __res.second); 256 } 257 258 #if __cplusplus >= 201103L 259 std::pair<iterator, bool> 260 insert(value_type&& __x) 261 { 262 auto __res = _Base::insert(std::move(__x)); 263 return { { __res.first, this }, __res.second }; 264 } 265 #endif 266 267 iterator 268 insert(const_iterator __position, const value_type& __x) 269 { 270 __glibcxx_check_insert(__position); 271 return iterator(_Base::insert(__position.base(), __x), this); 272 } 273 274 #if __cplusplus >= 201103L 275 iterator 276 insert(const_iterator __position, value_type&& __x) 277 { 278 __glibcxx_check_insert(__position); 279 return { _Base::insert(__position.base(), std::move(__x)), this }; 280 } 281 #endif 282 283 template <typename _InputIterator> 284 void 285 insert(_InputIterator __first, _InputIterator __last) 286 { 287 typename __gnu_debug::_Distance_traits<_InputIterator>::__type __dist; 288 __glibcxx_check_valid_range2(__first, __last, __dist); 289 290 if (__dist.second >= __gnu_debug::__dp_sign) 291 _Base::insert(__gnu_debug::__unsafe(__first), 292 __gnu_debug::__unsafe(__last)); 293 else 294 _Base::insert(__first, __last); 295 } 296 297 #if __cplusplus >= 201103L 298 void 299 insert(initializer_list<value_type> __l) 300 { _Base::insert(__l); } 301 #endif 302 303 #if __cplusplus > 201402L 304 using node_type = typename _Base::node_type; 305 using insert_return_type = _Node_insert_return<iterator, node_type>; 306 307 node_type 308 extract(const_iterator __position) 309 { 310 __glibcxx_check_erase(__position); 311 this->_M_invalidate_if(_Equal(__position.base())); 312 return _Base::extract(__position.base()); 313 } 314 315 node_type 316 extract(const key_type& __key) 317 { 318 const auto __position = find(__key); 319 if (__position != end()) 320 return extract(__position); 321 return {}; 322 } 323 324 insert_return_type 325 insert(node_type&& __nh) 326 { 327 auto __ret = _Base::insert(std::move(__nh)); 328 iterator __pos = iterator(__ret.position, this); 329 return { __pos, __ret.inserted, std::move(__ret.node) }; 330 } 331 332 iterator 333 insert(const_iterator __hint, node_type&& __nh) 334 { 335 __glibcxx_check_insert(__hint); 336 return { _Base::insert(__hint.base(), std::move(__nh)), this }; 337 } 338 339 using _Base::merge; 340 #endif // C++17 341 342 #if __cplusplus >= 201103L 343 _GLIBCXX_ABI_TAG_CXX11 344 iterator 345 erase(const_iterator __position) 346 { 347 __glibcxx_check_erase(__position); 348 return { erase(__position.base()), this }; 349 } 350 351 _Base_iterator 352 erase(_Base_const_iterator __position) 353 { 354 __glibcxx_check_erase2(__position); 355 this->_M_invalidate_if(_Equal(__position)); 356 return _Base::erase(__position); 357 } 358 #else 359 void 360 erase(iterator __position) 361 { 362 __glibcxx_check_erase(__position); 363 this->_M_invalidate_if(_Equal(__position.base())); 364 _Base::erase(__position.base()); 365 } 366 #endif 367 368 size_type 369 erase(const key_type& __x) 370 { 371 _Base_iterator __victim = _Base::find(__x); 372 if (__victim == _Base::end()) 373 return 0; 374 else 375 { 376 this->_M_invalidate_if(_Equal(__victim)); 377 _Base::erase(__victim); 378 return 1; 379 } 380 } 381 382 #if __cplusplus >= 201103L 383 _GLIBCXX_ABI_TAG_CXX11 384 iterator 385 erase(const_iterator __first, const_iterator __last) 386 { 387 // _GLIBCXX_RESOLVE_LIB_DEFECTS 388 // 151. can't currently clear() empty container 389 __glibcxx_check_erase_range(__first, __last); 390 for (_Base_const_iterator __victim = __first.base(); 391 __victim != __last.base(); ++__victim) 392 { 393 _GLIBCXX_DEBUG_VERIFY(__victim != _Base::cend(), 394 _M_message(__gnu_debug::__msg_valid_range) 395 ._M_iterator(__first, "first") 396 ._M_iterator(__last, "last")); 397 this->_M_invalidate_if(_Equal(__victim)); 398 } 399 400 return { _Base::erase(__first.base(), __last.base()), this }; 401 } 402 #else 403 void 404 erase(iterator __first, iterator __last) 405 { 406 // _GLIBCXX_RESOLVE_LIB_DEFECTS 407 // 151. can't currently clear() empty container 408 __glibcxx_check_erase_range(__first, __last); 409 for (_Base_iterator __victim = __first.base(); 410 __victim != __last.base(); ++__victim) 411 { 412 _GLIBCXX_DEBUG_VERIFY(__victim != _Base::end(), 413 _M_message(__gnu_debug::__msg_valid_range) 414 ._M_iterator(__first, "first") 415 ._M_iterator(__last, "last")); 416 this->_M_invalidate_if(_Equal(__victim)); 417 } 418 _Base::erase(__first.base(), __last.base()); 419 } 420 #endif 421 422 void 423 swap(set& __x) 424 _GLIBCXX_NOEXCEPT_IF( noexcept(declval<_Base&>().swap(__x)) ) 425 { 426 _Safe::_M_swap(__x); 427 _Base::swap(__x); 428 } 429 430 void 431 clear() _GLIBCXX_NOEXCEPT 432 { 433 this->_M_invalidate_all(); 434 _Base::clear(); 435 } 436 437 // observers: 438 using _Base::key_comp; 439 using _Base::value_comp; 440 441 // set operations: 442 iterator 443 find(const key_type& __x) 444 { return iterator(_Base::find(__x), this); } 445 446 // _GLIBCXX_RESOLVE_LIB_DEFECTS 447 // 214. set::find() missing const overload 448 const_iterator 449 find(const key_type& __x) const 450 { return const_iterator(_Base::find(__x), this); } 451 452 #if __cplusplus > 201103L 453 template<typename _Kt, 454 typename _Req = 455 typename __has_is_transparent<_Compare, _Kt>::type> 456 iterator 457 find(const _Kt& __x) 458 { return { _Base::find(__x), this }; } 459 460 template<typename _Kt, 461 typename _Req = 462 typename __has_is_transparent<_Compare, _Kt>::type> 463 const_iterator 464 find(const _Kt& __x) const 465 { return { _Base::find(__x), this }; } 466 #endif 467 468 using _Base::count; 469 470 iterator 471 lower_bound(const key_type& __x) 472 { return iterator(_Base::lower_bound(__x), this); } 473 474 // _GLIBCXX_RESOLVE_LIB_DEFECTS 475 // 214. set::find() missing const overload 476 const_iterator 477 lower_bound(const key_type& __x) const 478 { return const_iterator(_Base::lower_bound(__x), this); } 479 480 #if __cplusplus > 201103L 481 template<typename _Kt, 482 typename _Req = 483 typename __has_is_transparent<_Compare, _Kt>::type> 484 iterator 485 lower_bound(const _Kt& __x) 486 { return { _Base::lower_bound(__x), this }; } 487 488 template<typename _Kt, 489 typename _Req = 490 typename __has_is_transparent<_Compare, _Kt>::type> 491 const_iterator 492 lower_bound(const _Kt& __x) const 493 { return { _Base::lower_bound(__x), this }; } 494 #endif 495 496 iterator 497 upper_bound(const key_type& __x) 498 { return iterator(_Base::upper_bound(__x), this); } 499 500 // _GLIBCXX_RESOLVE_LIB_DEFECTS 501 // 214. set::find() missing const overload 502 const_iterator 503 upper_bound(const key_type& __x) const 504 { return const_iterator(_Base::upper_bound(__x), this); } 505 506 #if __cplusplus > 201103L 507 template<typename _Kt, 508 typename _Req = 509 typename __has_is_transparent<_Compare, _Kt>::type> 510 iterator 511 upper_bound(const _Kt& __x) 512 { return { _Base::upper_bound(__x), this }; } 513 514 template<typename _Kt, 515 typename _Req = 516 typename __has_is_transparent<_Compare, _Kt>::type> 517 const_iterator 518 upper_bound(const _Kt& __x) const 519 { return { _Base::upper_bound(__x), this }; } 520 #endif 521 522 std::pair<iterator, iterator> 523 equal_range(const key_type& __x) 524 { 525 std::pair<_Base_iterator, _Base_iterator> __res = 526 _Base::equal_range(__x); 527 return std::make_pair(iterator(__res.first, this), 528 iterator(__res.second, this)); 529 } 530 531 // _GLIBCXX_RESOLVE_LIB_DEFECTS 532 // 214. set::find() missing const overload 533 std::pair<const_iterator, const_iterator> 534 equal_range(const key_type& __x) const 535 { 536 std::pair<_Base_const_iterator, _Base_const_iterator> __res = 537 _Base::equal_range(__x); 538 return std::make_pair(const_iterator(__res.first, this), 539 const_iterator(__res.second, this)); 540 } 541 542 #if __cplusplus > 201103L 543 template<typename _Kt, 544 typename _Req = 545 typename __has_is_transparent<_Compare, _Kt>::type> 546 std::pair<iterator, iterator> 547 equal_range(const _Kt& __x) 548 { 549 auto __res = _Base::equal_range(__x); 550 return { { __res.first, this }, { __res.second, this } }; 551 } 552 553 template<typename _Kt, 554 typename _Req = 555 typename __has_is_transparent<_Compare, _Kt>::type> 556 std::pair<const_iterator, const_iterator> 557 equal_range(const _Kt& __x) const 558 { 559 auto __res = _Base::equal_range(__x); 560 return { { __res.first, this }, { __res.second, this } }; 561 } 562 #endif 563 564 _Base& 565 _M_base() _GLIBCXX_NOEXCEPT { return *this; } 566 567 const _Base& 568 _M_base() const _GLIBCXX_NOEXCEPT { return *this; } 569 }; 570 571 #if __cpp_deduction_guides >= 201606 572 573 template<typename _InputIterator, 574 typename _Compare = 575 less<typename iterator_traits<_InputIterator>::value_type>, 576 typename _Allocator = 577 allocator<typename iterator_traits<_InputIterator>::value_type>, 578 typename = _RequireInputIter<_InputIterator>, 579 typename = _RequireNotAllocator<_Compare>, 580 typename = _RequireAllocator<_Allocator>> 581 set(_InputIterator, _InputIterator, 582 _Compare = _Compare(), _Allocator = _Allocator()) 583 -> set<typename iterator_traits<_InputIterator>::value_type, 584 _Compare, _Allocator>; 585 586 template<typename _Key, typename _Compare = less<_Key>, 587 typename _Allocator = allocator<_Key>, 588 typename = _RequireNotAllocator<_Compare>, 589 typename = _RequireAllocator<_Allocator>> 590 set(initializer_list<_Key>, 591 _Compare = _Compare(), _Allocator = _Allocator()) 592 -> set<_Key, _Compare, _Allocator>; 593 594 template<typename _InputIterator, typename _Allocator, 595 typename = _RequireInputIter<_InputIterator>, 596 typename = _RequireAllocator<_Allocator>> 597 set(_InputIterator, _InputIterator, _Allocator) 598 -> set<typename iterator_traits<_InputIterator>::value_type, 599 less<typename iterator_traits<_InputIterator>::value_type>, 600 _Allocator>; 601 602 template<typename _Key, typename _Allocator, 603 typename = _RequireAllocator<_Allocator>> 604 set(initializer_list<_Key>, _Allocator) 605 -> set<_Key, less<_Key>, _Allocator>; 606 607 #endif // deduction guides 608 609 template<typename _Key, typename _Compare, typename _Allocator> 610 inline bool 611 operator==(const set<_Key, _Compare, _Allocator>& __lhs, 612 const set<_Key, _Compare, _Allocator>& __rhs) 613 { return __lhs._M_base() == __rhs._M_base(); } 614 615 #if __cpp_lib_three_way_comparison 616 template<typename _Key, typename _Compare, typename _Alloc> 617 inline __detail::__synth3way_t<_Key> 618 operator<=>(const set<_Key, _Compare, _Alloc>& __lhs, 619 const set<_Key, _Compare, _Alloc>& __rhs) 620 { return __lhs._M_base() <=> __rhs._M_base(); } 621 #else 622 template<typename _Key, typename _Compare, typename _Allocator> 623 inline bool 624 operator!=(const set<_Key, _Compare, _Allocator>& __lhs, 625 const set<_Key, _Compare, _Allocator>& __rhs) 626 { return __lhs._M_base() != __rhs._M_base(); } 627 628 template<typename _Key, typename _Compare, typename _Allocator> 629 inline bool 630 operator<(const set<_Key, _Compare, _Allocator>& __lhs, 631 const set<_Key, _Compare, _Allocator>& __rhs) 632 { return __lhs._M_base() < __rhs._M_base(); } 633 634 template<typename _Key, typename _Compare, typename _Allocator> 635 inline bool 636 operator<=(const set<_Key, _Compare, _Allocator>& __lhs, 637 const set<_Key, _Compare, _Allocator>& __rhs) 638 { return __lhs._M_base() <= __rhs._M_base(); } 639 640 template<typename _Key, typename _Compare, typename _Allocator> 641 inline bool 642 operator>=(const set<_Key, _Compare, _Allocator>& __lhs, 643 const set<_Key, _Compare, _Allocator>& __rhs) 644 { return __lhs._M_base() >= __rhs._M_base(); } 645 646 template<typename _Key, typename _Compare, typename _Allocator> 647 inline bool 648 operator>(const set<_Key, _Compare, _Allocator>& __lhs, 649 const set<_Key, _Compare, _Allocator>& __rhs) 650 { return __lhs._M_base() > __rhs._M_base(); } 651 #endif // three-way comparison 652 653 template<typename _Key, typename _Compare, typename _Allocator> 654 void 655 swap(set<_Key, _Compare, _Allocator>& __x, 656 set<_Key, _Compare, _Allocator>& __y) 657 _GLIBCXX_NOEXCEPT_IF(noexcept(__x.swap(__y))) 658 { return __x.swap(__y); } 659 660 } // namespace __debug 661 } // namespace std 662 663 #endif
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